diff --git a/CleanSpec.mk b/CleanSpec.mk
index f6ef906..c84bd24 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -88,3 +88,5 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/root/product_services)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/recovery/root/product_services)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/debug_ramdisk/product_services)
+$(call add-clean-step, find $(PRODUCT_OUT) -type l -name "charger" -print0 | xargs -0 rm -f)
+$(call add-clean-step, rm -f $(PRODUCT_OUT)/system/bin/adbd)
diff --git a/TEST_MAPPING b/TEST_MAPPING
index a3bd44f..51d5755 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -4,24 +4,27 @@
       "name": "adbd_test"
     },
     {
+      "name": "CtsInitTestCases"
+    },
+    {
       "name": "debuggerd_test"
     },
     {
-      "name": "fs_mgr_unit_test"
+      "name": "CtsFsMgrTestCases"
     },
     {
       "name": "fs_mgr_vendor_overlay_test"
     },
     {
-      "name": "init_tests"
-    },
-    {
       "name": "libbase_test"
     },
     {
       "name": "libpackagelistparser_test"
     },
     {
+      "name": "libcutils_test"
+    },
+    {
       "name": "libprocinfo_test"
     },
     {
diff --git a/adb/Android.bp b/adb/Android.bp
index 06cfcbf..bd1f124 100644
--- a/adb/Android.bp
+++ b/adb/Android.bp
@@ -27,7 +27,6 @@
         "-DADB_HOST=1",         // overridden by adbd_defaults
         "-DALLOW_ADBD_ROOT=0",  // overridden by adbd_defaults
         "-DANDROID_BASE_UNIQUE_FD_DISABLE_IMPLICIT_CONVERSION=1",
-        "-DENABLE_FASTDEPLOY=1", // enable fast deploy
     ],
     cpp_std: "experimental",
 
@@ -135,6 +134,7 @@
     "transport_fd.cpp",
     "transport_local.cpp",
     "transport_usb.cpp",
+    "types.cpp",
 ]
 
 libadb_posix_srcs = [
@@ -142,6 +142,10 @@
     "sysdeps/posix/network.cpp",
 ]
 
+libadb_linux_srcs = [
+    "fdevent/fdevent_epoll.cpp",
+]
+
 libadb_test_srcs = [
     "adb_io_test.cpp",
     "adb_listeners_test.cpp",
@@ -170,12 +174,11 @@
 
     target: {
         linux: {
-            srcs: ["client/usb_linux.cpp"],
+            srcs: ["client/usb_linux.cpp"] + libadb_linux_srcs,
         },
         darwin: {
             srcs: ["client/usb_osx.cpp"],
         },
-
         not_windows: {
             srcs: libadb_posix_srcs,
         },
@@ -250,7 +253,7 @@
         "libbase",
         "libcutils",
         "libcrypto_utils",
-        "libcrypto",
+        "libcrypto_static",
         "libdiagnose_usb",
         "liblog",
         "libusb",
@@ -342,7 +345,7 @@
     // libminadbd wants both, as it's used to build native tests.
     compile_multilib: "both",
 
-    srcs: libadb_srcs + libadb_posix_srcs + [
+    srcs: libadb_srcs + libadb_linux_srcs + libadb_posix_srcs + [
         "daemon/auth.cpp",
         "daemon/jdwp_service.cpp",
     ],
@@ -354,11 +357,12 @@
     generated_headers: ["platform_tools_version"],
 
     static_libs: [
-        "libadbconnection_server",
         "libdiagnose_usb",
     ],
 
     shared_libs: [
+        "libadbconnection_server",
+        "libadbd_auth",
         "libasyncio",
         "libbase",
         "libcrypto",
@@ -406,12 +410,13 @@
     ],
 
     static_libs: [
-        "libadbconnection_server",
         "libadbd_core",
         "libdiagnose_usb",
     ],
 
     shared_libs: [
+        "libadbconnection_server",
+        "libadbd_auth",
         "libasyncio",
         "libbase",
         "libcrypto",
@@ -420,33 +425,16 @@
         "liblog",
     ],
 
-    product_variables: {
-        debuggable: {
-            required: [
-                "remount",
-            ],
-        },
-    },
-
     target: {
         android: {
             srcs: [
                 "daemon/abb_service.cpp",
                 "daemon/framebuffer_service.cpp",
                 "daemon/mdns.cpp",
-                "daemon/reboot_service.cpp",
-                "daemon/remount_service.cpp",
                 "daemon/restart_service.cpp",
-                "daemon/set_verity_enable_state_service.cpp",
-            ],
-            static_libs: [
-                "libavb_user",
             ],
             shared_libs: [
-                "libbootloader_message",
                 "libmdnssd",
-                "libfec",
-                "libfs_mgr",
                 "libselinux",
             ],
         },
@@ -475,6 +463,8 @@
     ],
 
     shared_libs: [
+        "libadbconnection_server",
+        "libadbd_auth",
         "libadbd_services",
         "libasyncio",
         "libbase",
@@ -507,63 +497,43 @@
         keep_symbols: true,
     },
 
-    shared_libs: [
-        "libadbd",
-        "libadbd_services",
-        "libbase",
-        "libcap",
-        "libcrypto",
-        "libcutils",
-        "liblog",
-        "libminijail",
-        "libselinux",
-    ],
-}
-
-cc_binary {
-    name: "static_adbd",
-    defaults: ["adbd_defaults", "host_adbd_supported"],
-
-    recovery_available: false,
-    static_executable: true,
-    host_supported: false,
-
-    srcs: [
-        "daemon/main.cpp",
-    ],
-
-    cflags: [
-        "-D_GNU_SOURCE",
-        "-Wno-deprecated-declarations",
-    ],
-
-    strip: {
-        keep_symbols: true,
-    },
-
+    stl: "libc++_static",
     static_libs: [
-        "libadbconnection_server",
         "libadbd",
+        "libadbd_auth",
         "libadbd_services",
         "libasyncio",
-        "libavb_user",
         "libbase",
-        "libbootloader_message",
         "libcap",
-        "libcrypto",
         "libcrypto_utils",
         "libcutils",
         "libdiagnose_usb",
-        "libext4_utils",
-        "libfec",
-        "libfec_rs",
-        "libfs_mgr",
         "liblog",
-        "liblp",
         "libmdnssd",
         "libminijail",
         "libselinux",
-        "libsquashfs_utils",
+    ],
+
+    shared_libs: [
+        "libadbconnection_server",
+        "libcrypto",
+    ],
+}
+
+phony {
+    name: "adbd_system_binaries",
+    required: [
+        "abb",
+        "libadbd_auth",
+        "reboot",
+        "set-verity-state",
+    ]
+}
+
+phony {
+    name: "adbd_system_binaries_recovery",
+    required: [
+        "reboot.recovery",
     ],
 }
 
@@ -614,11 +584,11 @@
 
     static_libs: [
         "libadbd",
+        "libadbd_auth",
         "libbase",
-        "libbootloader_message",
         "libcutils",
         "libcrypto_utils",
-        "libcrypto",
+        "libcrypto_static",
         "libdiagnose_usb",
         "liblog",
         "libusb",
@@ -626,6 +596,7 @@
         "libselinux",
     ],
     test_suites: ["device-tests"],
+    require_root: true,
 }
 
 python_test_host {
@@ -687,6 +658,7 @@
     name: "libfastdeploy_host",
     defaults: ["adb_defaults"],
     srcs: [
+        "fastdeploy/deploypatchgenerator/apk_archive.cpp",
         "fastdeploy/deploypatchgenerator/deploy_patch_generator.cpp",
         "fastdeploy/deploypatchgenerator/patch_utils.cpp",
         "fastdeploy/proto/ApkEntry.proto",
@@ -723,6 +695,7 @@
     name: "fastdeploy_test",
     defaults: ["adb_defaults"],
     srcs: [
+        "fastdeploy/deploypatchgenerator/apk_archive_test.cpp",
         "fastdeploy/deploypatchgenerator/deploy_patch_generator_test.cpp",
         "fastdeploy/deploypatchgenerator/patch_utils_test.cpp",
     ],
@@ -750,6 +723,45 @@
         },
     },
     data: [
+        "fastdeploy/testdata/rotating_cube-metadata-release.data",
         "fastdeploy/testdata/rotating_cube-release.apk",
+        "fastdeploy/testdata/sample.apk",
+        "fastdeploy/testdata/sample.cd",
     ],
 }
+
+prebuilt_etc {
+    name: "com.android.adbd.ld.config.txt",
+    src: "apex/ld.config.txt",
+    filename: "ld.config.txt",
+    installable: false,
+}
+
+apex {
+    name: "com.android.adbd",
+    manifest: "apex/apex_manifest.json",
+
+    binaries: ["adbd"],
+    prebuilts: ["com.android.adbd.init.rc", "com.android.adbd.ld.config.txt"],
+
+    key: "com.android.adbd.key",
+    certificate: ":com.android.adbd.certificate",
+}
+
+apex_key {
+    name: "com.android.adbd.key",
+    public_key: "apex/com.android.adbd.avbpubkey",
+    private_key: "apex/com.android.adbd.pem",
+}
+
+android_app_certificate {
+    name: "com.android.adbd.certificate",
+    certificate: "apex/com.android.adbd",
+}
+
+prebuilt_etc {
+    name: "com.android.adbd.init.rc",
+    src: "apex/adbd.rc",
+    filename: "init.rc",
+    installable: false,
+}
diff --git a/adb/SOCKET-ACTIVATION.txt b/adb/SOCKET-ACTIVATION.txt
new file mode 100644
index 0000000..4ef62ac
--- /dev/null
+++ b/adb/SOCKET-ACTIVATION.txt
@@ -0,0 +1,42 @@
+adb can be configured to work with systemd-style socket activation,
+allowing the daemon to start automatically when the adb control port
+is forwarded across a network. You need two files, placed in the usual
+systemd service directories (e.g., ~/.config/systemd/user for a user
+service).
+
+adb.service:
+
+--- START adb.service CUT HERE ---
+[Unit]
+Description=adb
+After=adb.socket
+Requires=adb.socket
+[Service]
+Type=simple
+# FD 3 is part of the systemd interface
+ExecStart=/path/to/adb server nodaemon -L acceptfd:3
+--- END adb.service CUT HERE ---
+
+--- START adb.socket CUT HERE ---
+[Unit]
+Description=adb
+PartOf=adb.service
+[Socket]
+ListenStream=127.0.0.1:5037
+Accept=no
+[Install]
+WantedBy=sockets.target
+--- END adb.socket CUT HERE ---
+
+After installing the adb service, the adb server will be started
+automatically on any connection to 127.0.0.1:5037 (the default adb
+control port), even after adb kill-server kills the server.
+
+Other "superserver" launcher systems (like macOS launchd) can be
+configured analogously. The important part is that adb be started with
+"server" and "nodaemon" command line arguments and that the listen
+address (passed to -L) name a file descriptor that's ready to
+accept(2) connections and that's already bound to the desired address
+and listening. inetd-style pre-accepted sockets do _not_ work in this
+configuration: the file descriptor passed to acceptfd must be the
+serve socket, not the accepted connection socket.
diff --git a/adb/adb.cpp b/adb/adb.cpp
index 7dff1b8..9b663be 100644
--- a/adb/adb.cpp
+++ b/adb/adb.cpp
@@ -300,6 +300,7 @@
     handle_online(t);
 #else
     if (!auth_required) {
+        LOG(INFO) << "authentication not required";
         handle_online(t);
         send_connect(t);
     } else {
@@ -337,9 +338,12 @@
             case ADB_AUTH_SIGNATURE: {
                 // TODO: Switch to string_view.
                 std::string signature(p->payload.begin(), p->payload.end());
-                if (adbd_auth_verify(t->token, sizeof(t->token), signature)) {
+                std::string auth_key;
+                if (adbd_auth_verify(t->token, sizeof(t->token), signature, &auth_key)) {
                     adbd_auth_verified(t);
                     t->failed_auth_attempts = 0;
+                    t->auth_key = auth_key;
+                    adbd_notify_framework_connected_key(t);
                 } else {
                     if (t->failed_auth_attempts++ > 256) std::this_thread::sleep_for(1s);
                     send_auth_request(t);
@@ -348,7 +352,8 @@
             }
 
             case ADB_AUTH_RSAPUBLICKEY:
-                adbd_auth_confirm_key(p->payload.data(), p->msg.data_length, t);
+                t->auth_key = std::string(p->payload.data());
+                adbd_auth_confirm_key(t);
                 break;
 #endif
             default:
@@ -1127,7 +1132,9 @@
 
     if (service == "features") {
         std::string error;
-        atransport* t = acquire_one_transport(type, serial, transport_id, nullptr, &error);
+        atransport* t =
+                s->transport ? s->transport
+                             : acquire_one_transport(type, serial, transport_id, nullptr, &error);
         if (t != nullptr) {
             SendOkay(reply_fd, FeatureSetToString(t->features()));
         } else {
@@ -1186,7 +1193,9 @@
     // These always report "unknown" rather than the actual error, for scripts.
     if (service == "get-serialno") {
         std::string error;
-        atransport* t = acquire_one_transport(type, serial, transport_id, nullptr, &error);
+        atransport* t =
+                s->transport ? s->transport
+                             : acquire_one_transport(type, serial, transport_id, nullptr, &error);
         if (t) {
             SendOkay(reply_fd, !t->serial.empty() ? t->serial : "unknown");
         } else {
@@ -1196,7 +1205,9 @@
     }
     if (service == "get-devpath") {
         std::string error;
-        atransport* t = acquire_one_transport(type, serial, transport_id, nullptr, &error);
+        atransport* t =
+                s->transport ? s->transport
+                             : acquire_one_transport(type, serial, transport_id, nullptr, &error);
         if (t) {
             SendOkay(reply_fd, !t->devpath.empty() ? t->devpath : "unknown");
         } else {
@@ -1206,7 +1217,9 @@
     }
     if (service == "get-state") {
         std::string error;
-        atransport* t = acquire_one_transport(type, serial, transport_id, nullptr, &error);
+        atransport* t =
+                s->transport ? s->transport
+                             : acquire_one_transport(type, serial, transport_id, nullptr, &error);
         if (t) {
             SendOkay(reply_fd, t->connection_state_name());
         } else {
@@ -1230,7 +1243,9 @@
 
     if (service == "reconnect") {
         std::string response;
-        atransport* t = acquire_one_transport(type, serial, transport_id, nullptr, &response, true);
+        atransport* t = s->transport ? s->transport
+                                     : acquire_one_transport(type, serial, transport_id, nullptr,
+                                                             &response, true);
         if (t != nullptr) {
             kick_transport(t, true);
             response =
@@ -1242,8 +1257,15 @@
 
     // TODO: Switch handle_forward_request to string_view.
     std::string service_str(service);
-    if (handle_forward_request(
-                service_str.c_str(), [=](std::string* error) { return s->transport; }, reply_fd)) {
+    auto transport_acquirer = [=](std::string* error) {
+        if (s->transport) {
+            return s->transport;
+        } else {
+            std::string error;
+            return acquire_one_transport(type, serial, transport_id, nullptr, &error);
+        }
+    };
+    if (handle_forward_request(service_str.c_str(), transport_acquirer, reply_fd)) {
         return HostRequestResult::Handled;
     }
 
diff --git a/adb/adb.h b/adb/adb.h
index 352b2fe..c6cb06a 100644
--- a/adb/adb.h
+++ b/adb/adb.h
@@ -33,6 +33,7 @@
 
 constexpr size_t MAX_PAYLOAD_V1 = 4 * 1024;
 constexpr size_t MAX_PAYLOAD = 1024 * 1024;
+constexpr size_t MAX_FRAMEWORK_PAYLOAD = 64 * 1024;
 
 constexpr size_t LINUX_MAX_SOCKET_SIZE = 4194304;
 
diff --git a/adb/adb_auth.h b/adb/adb_auth.h
index 2fc8478..2be9a76 100644
--- a/adb/adb_auth.h
+++ b/adb/adb_auth.h
@@ -50,8 +50,10 @@
 void adbd_auth_verified(atransport *t);
 
 void adbd_cloexec_auth_socket();
-bool adbd_auth_verify(const char* token, size_t token_size, const std::string& sig);
-void adbd_auth_confirm_key(const char* data, size_t len, atransport* t);
+bool adbd_auth_verify(const char* token, size_t token_size, const std::string& sig,
+                      std::string* auth_key);
+void adbd_auth_confirm_key(atransport* t);
+void adbd_notify_framework_connected_key(atransport* t);
 
 void send_auth_request(atransport *t);
 
diff --git a/adb/adb_utils.h b/adb/adb_utils.h
index faad03d..66cba12 100644
--- a/adb/adb_utils.h
+++ b/adb/adb_utils.h
@@ -16,6 +16,7 @@
 
 #pragma once
 
+#include <charconv>
 #include <condition_variable>
 #include <mutex>
 #include <string>
@@ -112,33 +113,17 @@
 // Base-10 stroll on a string_view.
 template <typename T>
 inline bool ParseUint(T* result, std::string_view str, std::string_view* remaining = nullptr) {
-    if (str.empty() || !isdigit(str[0])) {
+    T value;
+    const auto res = std::from_chars(str.begin(), str.end(), value);
+    if (res.ec != std::errc{}) {
         return false;
     }
-
-    T value = 0;
-    std::string_view::iterator it;
-    constexpr T max = std::numeric_limits<T>::max();
-    for (it = str.begin(); it != str.end() && isdigit(*it); ++it) {
-        if (value > max / 10) {
-            return false;
-        }
-
-        value *= 10;
-
-        T digit = *it - '0';
-        if (value > max - digit) {
-            return false;
-        }
-
-        value += digit;
+    if (res.ptr != str.end() && !remaining) {
+        return false;
+    }
+    if (remaining) {
+        *remaining = std::string_view(res.ptr, str.end() - res.ptr);
     }
     *result = value;
-    if (remaining) {
-        *remaining = str.substr(it - str.begin());
-    } else {
-      return it == str.end();
-    }
-
     return true;
 }
diff --git a/adb/apex/adbd.rc b/adb/apex/adbd.rc
new file mode 100644
index 0000000..9cb072b
--- /dev/null
+++ b/adb/apex/adbd.rc
@@ -0,0 +1,6 @@
+service adbd /apex/com.android.adbd/bin/adbd --root_seclabel=u:r:su:s0
+    class core
+    socket adbd seqpacket 660 system system
+    disabled
+    override
+    seclabel u:r:adbd:s0
diff --git a/adb/apex/apex_manifest.json b/adb/apex/apex_manifest.json
new file mode 100644
index 0000000..ff2df12
--- /dev/null
+++ b/adb/apex/apex_manifest.json
@@ -0,0 +1,4 @@
+{
+  "name": "com.android.adbd",
+  "version": 1
+}
diff --git a/adb/apex/com.android.adbd.avbpubkey b/adb/apex/com.android.adbd.avbpubkey
new file mode 100644
index 0000000..06235bd
--- /dev/null
+++ b/adb/apex/com.android.adbd.avbpubkey
Binary files differ
diff --git a/adb/apex/com.android.adbd.pem b/adb/apex/com.android.adbd.pem
new file mode 100644
index 0000000..2c9a860
--- /dev/null
+++ b/adb/apex/com.android.adbd.pem
@@ -0,0 +1,51 @@
+-----BEGIN RSA PRIVATE KEY-----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+oESWG/HXLN4Hw6j4iWt2NvqpnSVJrvYr6zar/QxRHOMwnUoUV3ugmzUkqFC/Nwmm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-----END RSA PRIVATE KEY-----
diff --git a/adb/apex/com.android.adbd.pk8 b/adb/apex/com.android.adbd.pk8
new file mode 100644
index 0000000..cdddc3f
--- /dev/null
+++ b/adb/apex/com.android.adbd.pk8
Binary files differ
diff --git a/adb/apex/com.android.adbd.x509.pem b/adb/apex/com.android.adbd.x509.pem
new file mode 100644
index 0000000..bb85c1d
--- /dev/null
+++ b/adb/apex/com.android.adbd.x509.pem
@@ -0,0 +1,35 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/adb/apex/ld.config.txt b/adb/apex/ld.config.txt
new file mode 100644
index 0000000..85f9b29
--- /dev/null
+++ b/adb/apex/ld.config.txt
@@ -0,0 +1,51 @@
+# Copyright (C) 2019 The Android Open Source Project
+#
+# Bionic loader config file for the adbd APEX.
+
+dir.adbd = /apex/com.android.adbd/bin/
+
+[adbd]
+additional.namespaces = platform,art,adbd
+
+namespace.default.isolated = true
+namespace.default.links = art,adbd,platform
+namespace.default.link.art.shared_libs = libadbconnection_server.so
+namespace.default.link.platform.allow_all_shared_libs = true
+namespace.default.link.adbd.allow_all_shared_libs = true
+
+###############################################################################
+# "adbd" APEX namespace
+###############################################################################
+namespace.adbd.isolated = true
+namespace.adbd.search.paths = /apex/com.android.adbd/${LIB}
+namespace.adbd.asan.search.paths = /apex/com.android.adbd/${LIB}
+namespace.adbd.links = platform
+namespace.adbd.link.platform.allow_all_shared_libs = true
+
+###############################################################################
+# "art" APEX namespace: used for libadbdconnection_server
+###############################################################################
+namespace.art.isolated = true
+namespace.art.search.paths = /apex/com.android.art/${LIB}
+namespace.art.asan.search.paths = /apex/com.android.art/${LIB}
+namespace.art.links = platform
+namespace.art.link.platform.allow_all_shared_libs = true
+
+###############################################################################
+# "platform" namespace: used for NDK libraries, and libadbd_auth
+###############################################################################
+namespace.platform.isolated = true
+namespace.platform.search.paths = /system/${LIB}
+namespace.platform.asan.search.paths = /data/asan/system/${LIB}
+
+# /system/lib/libc.so, etc are symlinks to
+# /apex/com.android.runtime/lib/bionic/libc.so, etc. Add the path to the
+# permitted paths because linker uses realpath(3) to check the accessibility
+# of the lib. We could add this to search.paths instead but that makes the
+# resolution of bionic libs be dependent on the order of /system/lib and
+# /apex/.../lib/bionic in search.paths. If the latter is after the former,
+# then the latter is never tried because libc.so is always found in
+# /system/lib but fails to pass the accessibility test because of its realpath.
+# It's better to not depend on the ordering if possible.
+namespace.platform.permitted.paths = /apex/com.android.runtime/${LIB}/bionic
+namespace.platform.asan.permitted.paths = /apex/com.android.runtime/${LIB}/bionic
diff --git a/adb/client/adb_client.cpp b/adb/client/adb_client.cpp
index d91ae35..f724cb5 100644
--- a/adb/client/adb_client.cpp
+++ b/adb/client/adb_client.cpp
@@ -222,7 +222,7 @@
     int port;
     std::string error;
     if (!parse_tcp_socket_spec(__adb_server_socket_spec, nullptr, &port, nullptr, &error)) {
-        LOG(FATAL) << "failed to parse server socket spec: " << error;
+        return {};
     }
 
     return adb_get_android_dir_path() + OS_PATH_SEPARATOR + "adb." + std::to_string(port);
diff --git a/adb/client/adb_install.cpp b/adb/client/adb_install.cpp
index a6e8998..73dcde1 100644
--- a/adb/client/adb_install.cpp
+++ b/adb/client/adb_install.cpp
@@ -37,9 +37,7 @@
 #include "commandline.h"
 #include "fastdeploy.h"
 
-#if defined(ENABLE_FASTDEPLOY)
 static constexpr int kFastDeployMinApi = 24;
-#endif
 
 namespace {
 
@@ -146,15 +144,7 @@
     *buf = '\0';
 }
 
-#if defined(ENABLE_FASTDEPLOY)
-static int delete_device_patch_file(const char* apkPath) {
-    std::string patchDevicePath = get_patch_path(apkPath);
-    return delete_device_file(patchDevicePath);
-}
-#endif
-
-static int install_app_streamed(int argc, const char** argv, bool use_fastdeploy,
-                                bool use_localagent) {
+static int install_app_streamed(int argc, const char** argv, bool use_fastdeploy) {
     printf("Performing Streamed Install\n");
 
     // The last argument must be the APK file
@@ -176,98 +166,80 @@
         error_exit("--fastdeploy doesn't support .apex files");
     }
 
-    if (use_fastdeploy == true) {
-#if defined(ENABLE_FASTDEPLOY)
-        TemporaryFile metadataTmpFile;
-        std::string patchTmpFilePath;
-        {
-            TemporaryFile patchTmpFile;
-            patchTmpFile.DoNotRemove();
-            patchTmpFilePath = patchTmpFile.path;
+    if (use_fastdeploy) {
+        auto metadata = extract_metadata(file);
+        if (metadata.has_value()) {
+            // pass all but 1st (command) and last (apk path) parameters through to pm for
+            // session creation
+            std::vector<const char*> pm_args{argv + 1, argv + argc - 1};
+            auto patchFd = install_patch(pm_args.size(), pm_args.data());
+            return stream_patch(file, std::move(metadata.value()), std::move(patchFd));
         }
+    }
 
-        FILE* metadataFile = fopen(metadataTmpFile.path, "wb");
-        extract_metadata(file, metadataFile);
-        fclose(metadataFile);
-
-        create_patch(file, metadataTmpFile.path, patchTmpFilePath.c_str());
-        // pass all but 1st (command) and last (apk path) parameters through to pm for
-        // session creation
-        std::vector<const char*> pm_args{argv + 1, argv + argc - 1};
-        install_patch(file, patchTmpFilePath.c_str(), pm_args.size(), pm_args.data());
-        adb_unlink(patchTmpFilePath.c_str());
-        delete_device_patch_file(file);
-        return 0;
-#else
-        error_exit("fastdeploy is disabled");
-#endif
-    } else {
-        struct stat sb;
-        if (stat(file, &sb) == -1) {
-            fprintf(stderr, "adb: failed to stat %s: %s\n", file, strerror(errno));
-            return 1;
-        }
-
-        unique_fd local_fd(adb_open(file, O_RDONLY | O_CLOEXEC));
-        if (local_fd < 0) {
-            fprintf(stderr, "adb: failed to open %s: %s\n", file, strerror(errno));
-            return 1;
-        }
-
-#ifdef __linux__
-        posix_fadvise(local_fd.get(), 0, 0, POSIX_FADV_SEQUENTIAL | POSIX_FADV_NOREUSE);
-#endif
-
-        const bool use_abb = can_use_feature(kFeatureAbb);
-        std::string error;
-        std::vector<std::string> cmd_args = {use_abb ? "package" : "exec:cmd package"};
-        cmd_args.reserve(argc + 3);
-
-        // don't copy the APK name, but, copy the rest of the arguments as-is
-        while (argc-- > 1) {
-            if (use_abb) {
-                cmd_args.push_back(*argv++);
-            } else {
-                cmd_args.push_back(escape_arg(*argv++));
-            }
-        }
-
-        // add size parameter [required for streaming installs]
-        // do last to override any user specified value
-        cmd_args.push_back("-S");
-        cmd_args.push_back(
-                android::base::StringPrintf("%" PRIu64, static_cast<uint64_t>(sb.st_size)));
-
-        if (is_apex) {
-            cmd_args.push_back("--apex");
-        }
-
-        unique_fd remote_fd;
-        if (use_abb) {
-            remote_fd = send_abb_exec_command(cmd_args, &error);
-        } else {
-            remote_fd.reset(adb_connect(android::base::Join(cmd_args, " "), &error));
-        }
-        if (remote_fd < 0) {
-            fprintf(stderr, "adb: connect error for write: %s\n", error.c_str());
-            return 1;
-        }
-
-        copy_to_file(local_fd.get(), remote_fd.get());
-
-        char buf[BUFSIZ];
-        read_status_line(remote_fd.get(), buf, sizeof(buf));
-        if (!strncmp("Success", buf, 7)) {
-            fputs(buf, stdout);
-            return 0;
-        }
-        fprintf(stderr, "adb: failed to install %s: %s", file, buf);
+    struct stat sb;
+    if (stat(file, &sb) == -1) {
+        fprintf(stderr, "adb: failed to stat %s: %s\n", file, strerror(errno));
         return 1;
     }
+
+    unique_fd local_fd(adb_open(file, O_RDONLY | O_CLOEXEC));
+    if (local_fd < 0) {
+        fprintf(stderr, "adb: failed to open %s: %s\n", file, strerror(errno));
+        return 1;
+    }
+
+#ifdef __linux__
+    posix_fadvise(local_fd.get(), 0, 0, POSIX_FADV_SEQUENTIAL | POSIX_FADV_NOREUSE);
+#endif
+
+    const bool use_abb = can_use_feature(kFeatureAbbExec);
+    std::string error;
+    std::vector<std::string> cmd_args = {use_abb ? "package" : "exec:cmd package"};
+    cmd_args.reserve(argc + 3);
+
+    // don't copy the APK name, but, copy the rest of the arguments as-is
+    while (argc-- > 1) {
+        if (use_abb) {
+            cmd_args.push_back(*argv++);
+        } else {
+            cmd_args.push_back(escape_arg(*argv++));
+        }
+    }
+
+    // add size parameter [required for streaming installs]
+    // do last to override any user specified value
+    cmd_args.push_back("-S");
+    cmd_args.push_back(android::base::StringPrintf("%" PRIu64, static_cast<uint64_t>(sb.st_size)));
+
+    if (is_apex) {
+        cmd_args.push_back("--apex");
+    }
+
+    unique_fd remote_fd;
+    if (use_abb) {
+        remote_fd = send_abb_exec_command(cmd_args, &error);
+    } else {
+        remote_fd.reset(adb_connect(android::base::Join(cmd_args, " "), &error));
+    }
+    if (remote_fd < 0) {
+        fprintf(stderr, "adb: connect error for write: %s\n", error.c_str());
+        return 1;
+    }
+
+    copy_to_file(local_fd.get(), remote_fd.get());
+
+    char buf[BUFSIZ];
+    read_status_line(remote_fd.get(), buf, sizeof(buf));
+    if (!strncmp("Success", buf, 7)) {
+        fputs(buf, stdout);
+        return 0;
+    }
+    fprintf(stderr, "adb: failed to install %s: %s", file, buf);
+    return 1;
 }
 
-static int install_app_legacy(int argc, const char** argv, bool use_fastdeploy,
-                              bool use_localagent) {
+static int install_app_legacy(int argc, const char** argv, bool use_fastdeploy) {
     printf("Performing Push Install\n");
 
     // Find last APK argument.
@@ -288,35 +260,26 @@
     int result = -1;
     std::vector<const char*> apk_file = {argv[last_apk]};
     std::string apk_dest = "/data/local/tmp/" + android::base::Basename(argv[last_apk]);
-
-    if (use_fastdeploy == true) {
-#if defined(ENABLE_FASTDEPLOY)
-        TemporaryFile metadataTmpFile;
-        TemporaryFile patchTmpFile;
-
-        FILE* metadataFile = fopen(metadataTmpFile.path, "wb");
-        extract_metadata(apk_file[0], metadataFile);
-        fclose(metadataFile);
-
-        create_patch(apk_file[0], metadataTmpFile.path, patchTmpFile.path);
-        apply_patch_on_device(apk_file[0], patchTmpFile.path, apk_dest.c_str());
-#else
-        error_exit("fastdeploy is disabled");
-#endif
-    } else {
-        if (!do_sync_push(apk_file, apk_dest.c_str(), false)) goto cleanup_apk;
-    }
-
     argv[last_apk] = apk_dest.c_str(); /* destination name, not source location */
-    result = pm_command(argc, argv);
 
-cleanup_apk:
-    if (use_fastdeploy == true) {
-#if defined(ENABLE_FASTDEPLOY)
-        delete_device_patch_file(apk_file[0]);
-#endif
+    if (use_fastdeploy) {
+        auto metadata = extract_metadata(apk_file[0]);
+        if (metadata.has_value()) {
+            auto patchFd = apply_patch_on_device(apk_dest.c_str());
+            int status = stream_patch(apk_file[0], std::move(metadata.value()), std::move(patchFd));
+
+            result = pm_command(argc, argv);
+            delete_device_file(apk_dest);
+
+            return status;
+        }
     }
-    delete_device_file(apk_dest);
+
+    if (do_sync_push(apk_file, apk_dest.c_str(), false)) {
+        result = pm_command(argc, argv);
+        delete_device_file(apk_dest);
+    }
+
     return result;
 }
 
@@ -325,7 +288,6 @@
     InstallMode installMode = INSTALL_DEFAULT;
     bool use_fastdeploy = false;
     bool is_reinstall = false;
-    bool use_localagent = false;
     FastDeploy_AgentUpdateStrategy agent_update_strategy = FastDeploy_AgentUpdateDifferentVersion;
 
     for (int i = 1; i < argc; i++) {
@@ -354,11 +316,6 @@
         } else if (!strcmp(argv[i], "--version-check-agent")) {
             processedArgIndicies.push_back(i);
             agent_update_strategy = FastDeploy_AgentUpdateDifferentVersion;
-#ifndef _WIN32
-        } else if (!strcmp(argv[i], "--local-agent")) {
-            processedArgIndicies.push_back(i);
-            use_localagent = true;
-#endif
         }
     }
 
@@ -370,14 +327,13 @@
         error_exit("Attempting to use streaming install on unsupported device");
     }
 
-#if defined(ENABLE_FASTDEPLOY)
-    if (use_fastdeploy == true && get_device_api_level() < kFastDeployMinApi) {
+    if (use_fastdeploy && get_device_api_level() < kFastDeployMinApi) {
         printf("Fast Deploy is only compatible with devices of API version %d or higher, "
                "ignoring.\n",
                kFastDeployMinApi);
         use_fastdeploy = false;
     }
-#endif
+    fastdeploy_set_agent_update_strategy(agent_update_strategy);
 
     std::vector<const char*> passthrough_argv;
     for (int i = 0; i < argc; i++) {
@@ -390,26 +346,13 @@
         error_exit("install requires an apk argument");
     }
 
-    if (use_fastdeploy == true) {
-#if defined(ENABLE_FASTDEPLOY)
-        fastdeploy_set_local_agent(use_localagent);
-        update_agent(agent_update_strategy);
-
-        // The last argument must be the APK file
-        const char* file = passthrough_argv.back();
-        use_fastdeploy = find_package(file);
-#else
-        error_exit("fastdeploy is disabled");
-#endif
-    }
-
     switch (installMode) {
         case INSTALL_PUSH:
             return install_app_legacy(passthrough_argv.size(), passthrough_argv.data(),
-                                      use_fastdeploy, use_localagent);
+                                      use_fastdeploy);
         case INSTALL_STREAM:
             return install_app_streamed(passthrough_argv.size(), passthrough_argv.data(),
-                                        use_fastdeploy, use_localagent);
+                                        use_fastdeploy);
         case INSTALL_DEFAULT:
         default:
             return 1;
diff --git a/adb/client/auth.cpp b/adb/client/auth.cpp
index ed6a9a8..e8be784 100644
--- a/adb/client/auth.cpp
+++ b/adb/client/auth.cpp
@@ -173,7 +173,8 @@
 
     RSA* key = RSA_new();
     if (!PEM_read_RSAPrivateKey(fp.get(), &key, nullptr, nullptr)) {
-        LOG(ERROR) << "Failed to read key";
+        LOG(ERROR) << "Failed to read key from '" << file << "'";
+        ERR_print_errors_fp(stderr);
         RSA_free(key);
         return nullptr;
     }
@@ -249,7 +250,7 @@
     return adb_get_android_dir_path() + OS_PATH_SEPARATOR + "adbkey";
 }
 
-static bool generate_userkey() {
+static bool load_userkey() {
     std::string path = get_user_key_path();
     if (path.empty()) {
         PLOG(ERROR) << "Error getting user key filename";
@@ -435,8 +436,8 @@
 void adb_auth_init() {
     LOG(INFO) << "adb_auth_init...";
 
-    if (!generate_userkey()) {
-        LOG(ERROR) << "Failed to generate user key";
+    if (!load_userkey()) {
+        LOG(ERROR) << "Failed to load (or generate) user key";
         return;
     }
 
diff --git a/adb/client/commandline.cpp b/adb/client/commandline.cpp
index 599e0e6..6465ffe 100644
--- a/adb/client/commandline.cpp
+++ b/adb/client/commandline.cpp
@@ -107,6 +107,7 @@
         "       localfilesystem:<unix domain socket name>\n"
         "       dev:<character device name>\n"
         "       jdwp:<process pid> (remote only)\n"
+        "       acceptfd:<fd> (listen only)\n"
         " forward --remove LOCAL   remove specific forward socket connection\n"
         " forward --remove-all     remove all forward socket connections\n"
         " ppp TTY [PARAMETER...]   run PPP over USB\n"
@@ -255,13 +256,8 @@
 }
 #endif
 
-// Reads from |fd| and prints received data. If |use_shell_protocol| is true
-// this expects that incoming data will use the shell protocol, in which case
-// stdout/stderr are routed independently and the remote exit code will be
-// returned.
-// if |callback| is non-null, stdout/stderr output will be handled by it.
-int read_and_dump(borrowed_fd fd, bool use_shell_protocol = false,
-                  StandardStreamsCallbackInterface* callback = &DEFAULT_STANDARD_STREAMS_CALLBACK) {
+int read_and_dump(borrowed_fd fd, bool use_shell_protocol,
+                  StandardStreamsCallbackInterface* callback) {
     int exit_code = 0;
     if (fd < 0) return exit_code;
 
@@ -1704,10 +1700,27 @@
             error_exit("tcpip: invalid port: %s", argv[1]);
         }
         return adb_connect_command(android::base::StringPrintf("tcpip:%d", port));
+    } else if (!strcmp(argv[0], "remount")) {
+        FeatureSet features;
+        std::string error;
+        if (!adb_get_feature_set(&features, &error)) {
+            fprintf(stderr, "error: %s\n", error.c_str());
+            return 1;
+        }
+
+        if (CanUseFeature(features, kFeatureRemountShell)) {
+            std::vector<const char*> args = {"shell"};
+            args.insert(args.cend(), argv, argv + argc);
+            return adb_shell(args.size(), args.data());
+        } else if (argc > 1) {
+            auto command = android::base::StringPrintf("%s:%s", argv[0], argv[1]);
+            return adb_connect_command(command);
+        } else {
+            return adb_connect_command("remount:");
+        }
     }
     // clang-format off
-    else if (!strcmp(argv[0], "remount") ||
-             !strcmp(argv[0], "reboot") ||
+    else if (!strcmp(argv[0], "reboot") ||
              !strcmp(argv[0], "reboot-bootloader") ||
              !strcmp(argv[0], "reboot-fastboot") ||
              !strcmp(argv[0], "usb") ||
diff --git a/adb/client/commandline.h b/adb/client/commandline.h
index cd5933a..ab77b29 100644
--- a/adb/client/commandline.h
+++ b/adb/client/commandline.h
@@ -109,6 +109,14 @@
         const std::string& command, bool disable_shell_protocol = false,
         StandardStreamsCallbackInterface* callback = &DEFAULT_STANDARD_STREAMS_CALLBACK);
 
+// Reads from |fd| and prints received data. If |use_shell_protocol| is true
+// this expects that incoming data will use the shell protocol, in which case
+// stdout/stderr are routed independently and the remote exit code will be
+// returned.
+// if |callback| is non-null, stdout/stderr output will be handled by it.
+int read_and_dump(borrowed_fd fd, bool use_shell_protocol = false,
+                  StandardStreamsCallbackInterface* callback = &DEFAULT_STANDARD_STREAMS_CALLBACK);
+
 // Connects to the device "abb" service with |command| and returns the fd.
 template <typename ContainerT>
 unique_fd send_abb_exec_command(const ContainerT& command_args, std::string* error) {
diff --git a/adb/client/fastdeploy.cpp b/adb/client/fastdeploy.cpp
index fbae219..5fa0edb 100644
--- a/adb/client/fastdeploy.cpp
+++ b/adb/client/fastdeploy.cpp
@@ -30,112 +30,109 @@
 #include "deployagent.inc"        // Generated include via build rule.
 #include "deployagentscript.inc"  // Generated include via build rule.
 #include "fastdeploy/deploypatchgenerator/deploy_patch_generator.h"
+#include "fastdeploy/deploypatchgenerator/patch_utils.h"
+#include "fastdeploy/proto/ApkEntry.pb.h"
 #include "fastdeploycallbacks.h"
 #include "sysdeps.h"
 
 #include "adb_utils.h"
 
-static constexpr long kRequiredAgentVersion = 0x00000002;
+static constexpr long kRequiredAgentVersion = 0x00000003;
 
-static constexpr const char* kDeviceAgentPath = "/data/local/tmp/";
+static constexpr int kPackageMissing = 3;
+static constexpr int kInvalidAgentVersion = 4;
+
 static constexpr const char* kDeviceAgentFile = "/data/local/tmp/deployagent.jar";
 static constexpr const char* kDeviceAgentScript = "/data/local/tmp/deployagent";
 
-static bool g_use_localagent = false;
+static constexpr bool g_verbose_timings = false;
+static FastDeploy_AgentUpdateStrategy g_agent_update_strategy =
+        FastDeploy_AgentUpdateDifferentVersion;
 
-long get_agent_version() {
-    std::vector<char> versionOutputBuffer;
-    std::vector<char> versionErrorBuffer;
+using APKMetaData = com::android::fastdeploy::APKMetaData;
 
-    int statusCode = capture_shell_command("/data/local/tmp/deployagent version",
-                                           &versionOutputBuffer, &versionErrorBuffer);
-    long version = -1;
+namespace {
 
-    if (statusCode == 0 && versionOutputBuffer.size() > 0) {
-        version = strtol((char*)versionOutputBuffer.data(), NULL, 16);
+struct TimeReporter {
+    TimeReporter(const char* label) : label_(label) {}
+    ~TimeReporter() {
+        if (g_verbose_timings) {
+            auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(
+                    std::chrono::steady_clock::now() - start_);
+            fprintf(stderr, "%s finished in %lldms\n", label_,
+                    static_cast<long long>(duration.count()));
+        }
     }
 
-    return version;
-}
+  private:
+    const char* label_;
+    std::chrono::steady_clock::time_point start_ = std::chrono::steady_clock::now();
+};
+#define REPORT_FUNC_TIME() TimeReporter reporter(__func__)
+
+struct FileDeleter {
+    FileDeleter(const char* path) : path_(path) {}
+    ~FileDeleter() { adb_unlink(path_); }
+
+  private:
+    const char* const path_;
+};
+
+}  // namespace
 
 int get_device_api_level() {
-    std::vector<char> sdkVersionOutputBuffer;
-    std::vector<char> sdkVersionErrorBuffer;
+    REPORT_FUNC_TIME();
+    std::vector<char> sdk_version_output_buffer;
+    std::vector<char> sdk_version_error_buffer;
     int api_level = -1;
 
-    int statusCode = capture_shell_command("getprop ro.build.version.sdk", &sdkVersionOutputBuffer,
-                                           &sdkVersionErrorBuffer);
-    if (statusCode == 0 && sdkVersionOutputBuffer.size() > 0) {
-        api_level = strtol((char*)sdkVersionOutputBuffer.data(), NULL, 10);
+    int statusCode = capture_shell_command("getprop ro.build.version.sdk",
+                                           &sdk_version_output_buffer, &sdk_version_error_buffer);
+    if (statusCode == 0 && sdk_version_output_buffer.size() > 0) {
+        api_level = strtol((char*)sdk_version_output_buffer.data(), NULL, 10);
     }
 
     return api_level;
 }
 
-void fastdeploy_set_local_agent(bool use_localagent) {
-    g_use_localagent = use_localagent;
+void fastdeploy_set_agent_update_strategy(FastDeploy_AgentUpdateStrategy agent_update_strategy) {
+    g_agent_update_strategy = agent_update_strategy;
 }
 
-static bool deploy_agent(bool checkTimeStamps) {
+static void push_to_device(const void* data, size_t byte_count, const char* dst, bool sync) {
     std::vector<const char*> srcs;
-    // TODO: Deploy agent from bin2c directly instead of writing to disk first.
-    TemporaryFile tempAgent;
-    android::base::WriteFully(tempAgent.fd, kDeployAgent, sizeof(kDeployAgent));
-    srcs.push_back(tempAgent.path);
-    if (!do_sync_push(srcs, kDeviceAgentFile, checkTimeStamps)) {
+    TemporaryFile tf;
+    android::base::WriteFully(tf.fd, data, byte_count);
+    srcs.push_back(tf.path);
+    // On Windows, the file needs to be flushed before pushing to device,
+    // but can't be removed until after the push.
+    unix_close(tf.release());
+
+    if (!do_sync_push(srcs, dst, sync)) {
         error_exit("Failed to push fastdeploy agent to device.");
     }
-    srcs.clear();
-    // TODO: Deploy agent from bin2c directly instead of writing to disk first.
-    TemporaryFile tempAgentScript;
-    android::base::WriteFully(tempAgentScript.fd, kDeployAgentScript, sizeof(kDeployAgentScript));
-    srcs.push_back(tempAgentScript.path);
-    if (!do_sync_push(srcs, kDeviceAgentScript, checkTimeStamps)) {
-        error_exit("Failed to push fastdeploy agent script to device.");
-    }
-    srcs.clear();
+}
+
+static bool deploy_agent(bool check_time_stamps) {
+    REPORT_FUNC_TIME();
+
+    push_to_device(kDeployAgent, sizeof(kDeployAgent), kDeviceAgentFile, check_time_stamps);
+    push_to_device(kDeployAgentScript, sizeof(kDeployAgentScript), kDeviceAgentScript,
+                   check_time_stamps);
+
     // on windows the shell script might have lost execute permission
     // so need to set this explicitly
     const char* kChmodCommandPattern = "chmod 777 %s";
-    std::string chmodCommand =
+    std::string chmod_command =
             android::base::StringPrintf(kChmodCommandPattern, kDeviceAgentScript);
-    int ret = send_shell_command(chmodCommand);
+    int ret = send_shell_command(chmod_command);
     if (ret != 0) {
-        error_exit("Error executing %s returncode: %d", chmodCommand.c_str(), ret);
+        error_exit("Error executing %s returncode: %d", chmod_command.c_str(), ret);
     }
 
     return true;
 }
 
-void update_agent(FastDeploy_AgentUpdateStrategy agentUpdateStrategy) {
-    long agent_version = get_agent_version();
-    switch (agentUpdateStrategy) {
-        case FastDeploy_AgentUpdateAlways:
-            deploy_agent(false);
-            break;
-        case FastDeploy_AgentUpdateNewerTimeStamp:
-            deploy_agent(true);
-            break;
-        case FastDeploy_AgentUpdateDifferentVersion:
-            if (agent_version != kRequiredAgentVersion) {
-                if (agent_version < 0) {
-                    printf("Could not detect agent on device, deploying\n");
-                } else {
-                    printf("Device agent version is (%ld), (%ld) is required, re-deploying\n",
-                           agent_version, kRequiredAgentVersion);
-                }
-                deploy_agent(false);
-            }
-            break;
-    }
-
-    agent_version = get_agent_version();
-    if (agent_version != kRequiredAgentVersion) {
-        error_exit("After update agent version remains incorrect! Expected %ld but version is %ld",
-                   kRequiredAgentVersion, agent_version);
-    }
-}
-
 static std::string get_string_from_utf16(const char16_t* input, int input_len) {
     ssize_t utf8_length = utf16_to_utf8_length(input, input_len);
     if (utf8_length <= 0) {
@@ -147,29 +144,29 @@
     return utf8;
 }
 
-static std::string get_packagename_from_apk(const char* apkPath) {
+static std::string get_package_name_from_apk(const char* apk_path) {
 #undef open
-    std::unique_ptr<android::ZipFileRO> zipFile(android::ZipFileRO::open(apkPath));
+    std::unique_ptr<android::ZipFileRO> zip_file((android::ZipFileRO::open)(apk_path));
 #define open ___xxx_unix_open
-    if (zipFile == nullptr) {
-        perror_exit("Could not open %s", apkPath);
+    if (zip_file == nullptr) {
+        perror_exit("Could not open %s", apk_path);
     }
-    android::ZipEntryRO entry = zipFile->findEntryByName("AndroidManifest.xml");
+    android::ZipEntryRO entry = zip_file->findEntryByName("AndroidManifest.xml");
     if (entry == nullptr) {
-        error_exit("Could not find AndroidManifest.xml inside %s", apkPath);
+        error_exit("Could not find AndroidManifest.xml inside %s", apk_path);
     }
     uint32_t manifest_len = 0;
-    if (!zipFile->getEntryInfo(entry, NULL, &manifest_len, NULL, NULL, NULL, NULL)) {
-        error_exit("Could not read AndroidManifest.xml inside %s", apkPath);
+    if (!zip_file->getEntryInfo(entry, NULL, &manifest_len, NULL, NULL, NULL, NULL)) {
+        error_exit("Could not read AndroidManifest.xml inside %s", apk_path);
     }
     std::vector<char> manifest_data(manifest_len);
-    if (!zipFile->uncompressEntry(entry, manifest_data.data(), manifest_len)) {
-        error_exit("Could not uncompress AndroidManifest.xml inside %s", apkPath);
+    if (!zip_file->uncompressEntry(entry, manifest_data.data(), manifest_len)) {
+        error_exit("Could not uncompress AndroidManifest.xml inside %s", apk_path);
     }
     android::ResXMLTree tree;
     android::status_t setto_status = tree.setTo(manifest_data.data(), manifest_len, true);
     if (setto_status != android::OK) {
-        error_exit("Could not parse AndroidManifest.xml inside %s", apkPath);
+        error_exit("Could not parse AndroidManifest.xml inside %s", apk_path);
     }
     android::ResXMLParser::event_code_t code;
     while ((code = tree.next()) != android::ResXMLParser::BAD_DOCUMENT &&
@@ -210,80 +207,97 @@
                 break;
         }
     }
-    error_exit("Could not find package name tag in AndroidManifest.xml inside %s", apkPath);
+    error_exit("Could not find package name tag in AndroidManifest.xml inside %s", apk_path);
 }
 
-void extract_metadata(const char* apkPath, FILE* outputFp) {
-    std::string packageName = get_packagename_from_apk(apkPath);
-    const char* kAgentExtractCommandPattern = "/data/local/tmp/deployagent extract %s";
-    std::string extractCommand =
-            android::base::StringPrintf(kAgentExtractCommandPattern, packageName.c_str());
+static long parse_agent_version(const std::vector<char>& version_buffer) {
+    long version = -1;
+    if (!version_buffer.empty()) {
+        version = strtol((char*)version_buffer.data(), NULL, 16);
+    }
+    return version;
+}
 
-    std::vector<char> extractErrorBuffer;
-    DeployAgentFileCallback cb(outputFp, &extractErrorBuffer);
-    int returnCode = send_shell_command(extractCommand, false, &cb);
+static void update_agent_if_necessary() {
+    switch (g_agent_update_strategy) {
+        case FastDeploy_AgentUpdateAlways:
+            deploy_agent(/*check_time_stamps=*/false);
+            break;
+        case FastDeploy_AgentUpdateNewerTimeStamp:
+            deploy_agent(/*check_time_stamps=*/true);
+            break;
+        default:
+            break;
+    }
+}
+
+std::optional<APKMetaData> extract_metadata(const char* apk_path) {
+    // Update agent if there is a command line argument forcing to do so.
+    update_agent_if_necessary();
+
+    REPORT_FUNC_TIME();
+
+    std::string package_name = get_package_name_from_apk(apk_path);
+
+    // Dump apk command checks the required vs current agent version and if they match then returns
+    // the APK dump for package. Doing this in a single call saves round-trip and agent launch time.
+    constexpr const char* kAgentDumpCommandPattern = "/data/local/tmp/deployagent dump %ld %s";
+    std::string dump_command = android::base::StringPrintf(
+            kAgentDumpCommandPattern, kRequiredAgentVersion, package_name.c_str());
+
+    std::vector<char> dump_out_buffer;
+    std::vector<char> dump_error_buffer;
+    int returnCode =
+            capture_shell_command(dump_command.c_str(), &dump_out_buffer, &dump_error_buffer);
+    if (returnCode >= kInvalidAgentVersion) {
+        // Agent has wrong version or missing.
+        long agent_version = parse_agent_version(dump_out_buffer);
+        if (agent_version < 0) {
+            printf("Could not detect agent on device, deploying\n");
+        } else {
+            printf("Device agent version is (%ld), (%ld) is required, re-deploying\n",
+                   agent_version, kRequiredAgentVersion);
+        }
+        deploy_agent(/*check_time_stamps=*/false);
+
+        // Retry with new agent.
+        dump_out_buffer.clear();
+        dump_error_buffer.clear();
+        returnCode =
+                capture_shell_command(dump_command.c_str(), &dump_out_buffer, &dump_error_buffer);
+    }
     if (returnCode != 0) {
-        fprintf(stderr, "Executing %s returned %d\n", extractCommand.c_str(), returnCode);
-        fprintf(stderr, "%*s\n", int(extractErrorBuffer.size()), extractErrorBuffer.data());
+        if (returnCode == kInvalidAgentVersion) {
+            long agent_version = parse_agent_version(dump_out_buffer);
+            error_exit(
+                    "After update agent version remains incorrect! Expected %ld but version is %ld",
+                    kRequiredAgentVersion, agent_version);
+        }
+        if (returnCode == kPackageMissing) {
+            fprintf(stderr, "Package %s not found, falling back to install\n",
+                    package_name.c_str());
+            return {};
+        }
+        fprintf(stderr, "Executing %s returned %d\n", dump_command.c_str(), returnCode);
+        fprintf(stderr, "%*s\n", int(dump_error_buffer.size()), dump_error_buffer.data());
         error_exit("Aborting");
     }
+
+    com::android::fastdeploy::APKDump dump;
+    if (!dump.ParseFromArray(dump_out_buffer.data(), dump_out_buffer.size())) {
+        fprintf(stderr, "Can't parse output of %s\n", dump_command.c_str());
+        error_exit("Aborting");
+    }
+
+    return PatchUtils::GetDeviceAPKMetaData(dump);
 }
 
-void create_patch(const char* apkPath, const char* metadataPath, const char* patchPath) {
-    DeployPatchGenerator generator(false);
-    unique_fd patchFd(adb_open(patchPath, O_WRONLY | O_CREAT | O_CLOEXEC));
-    if (patchFd < 0) {
-        perror_exit("adb: failed to create %s", patchPath);
-    }
-    bool success = generator.CreatePatch(apkPath, metadataPath, patchFd);
-    if (!success) {
-        error_exit("Failed to create patch for %s", apkPath);
-    }
-}
+unique_fd install_patch(int argc, const char** argv) {
+    REPORT_FUNC_TIME();
+    constexpr char kAgentApplyServicePattern[] = "shell:/data/local/tmp/deployagent apply - -pm %s";
 
-std::string get_patch_path(const char* apkPath) {
-    std::string packageName = get_packagename_from_apk(apkPath);
-    std::string patchDevicePath =
-            android::base::StringPrintf("%s%s.patch", kDeviceAgentPath, packageName.c_str());
-    return patchDevicePath;
-}
-
-void apply_patch_on_device(const char* apkPath, const char* patchPath, const char* outputPath) {
-    const std::string kAgentApplyCommandPattern = "/data/local/tmp/deployagent apply %s %s -o %s";
-    std::string packageName = get_packagename_from_apk(apkPath);
-    std::string patchDevicePath = get_patch_path(apkPath);
-
-    std::vector<const char*> srcs = {patchPath};
-    bool push_ok = do_sync_push(srcs, patchDevicePath.c_str(), false);
-    if (!push_ok) {
-        error_exit("Error pushing %s to %s returned", patchPath, patchDevicePath.c_str());
-    }
-
-    std::string applyPatchCommand =
-            android::base::StringPrintf(kAgentApplyCommandPattern.c_str(), packageName.c_str(),
-                                        patchDevicePath.c_str(), outputPath);
-
-    int returnCode = send_shell_command(applyPatchCommand);
-    if (returnCode != 0) {
-        error_exit("Executing %s returned %d", applyPatchCommand.c_str(), returnCode);
-    }
-}
-
-void install_patch(const char* apkPath, const char* patchPath, int argc, const char** argv) {
-    const std::string kAgentApplyCommandPattern = "/data/local/tmp/deployagent apply %s %s -pm %s";
-    std::string packageName = get_packagename_from_apk(apkPath);
-
-    std::string patchDevicePath =
-            android::base::StringPrintf("%s%s.patch", kDeviceAgentPath, packageName.c_str());
-
-    std::vector<const char*> srcs{patchPath};
-    bool push_ok = do_sync_push(srcs, patchDevicePath.c_str(), false);
-    if (!push_ok) {
-        error_exit("Error pushing %s to %s returned", patchPath, patchDevicePath.c_str());
-    }
-
-    std::vector<unsigned char> applyOutputBuffer;
-    std::vector<unsigned char> applyErrorBuffer;
+    std::vector<unsigned char> apply_output_buffer;
+    std::vector<unsigned char> apply_error_buffer;
     std::string argsString;
 
     bool rSwitchPresent = false;
@@ -298,17 +312,42 @@
         argsString.append("-r");
     }
 
-    std::string applyPatchCommand =
-            android::base::StringPrintf(kAgentApplyCommandPattern.c_str(), packageName.c_str(),
-                                        patchDevicePath.c_str(), argsString.c_str());
-    int returnCode = send_shell_command(applyPatchCommand);
-    if (returnCode != 0) {
-        error_exit("Executing %s returned %d", applyPatchCommand.c_str(), returnCode);
+    std::string error;
+    std::string apply_patch_service_string =
+            android::base::StringPrintf(kAgentApplyServicePattern, argsString.c_str());
+    unique_fd fd{adb_connect(apply_patch_service_string, &error)};
+    if (fd < 0) {
+        error_exit("Executing %s returned %s", apply_patch_service_string.c_str(), error.c_str());
+    }
+    return fd;
+}
+
+unique_fd apply_patch_on_device(const char* output_path) {
+    REPORT_FUNC_TIME();
+    constexpr char kAgentApplyServicePattern[] = "shell:/data/local/tmp/deployagent apply - -o %s";
+
+    std::string error;
+    std::string apply_patch_service_string =
+            android::base::StringPrintf(kAgentApplyServicePattern, output_path);
+    unique_fd fd{adb_connect(apply_patch_service_string, &error)};
+    if (fd < 0) {
+        error_exit("Executing %s returned %s", apply_patch_service_string.c_str(), error.c_str());
+    }
+    return fd;
+}
+
+static void create_patch(const char* apk_path, APKMetaData metadata, borrowed_fd patch_fd) {
+    REPORT_FUNC_TIME();
+    DeployPatchGenerator generator(/*is_verbose=*/false);
+    bool success = generator.CreatePatch(apk_path, std::move(metadata), patch_fd);
+    if (!success) {
+        error_exit("Failed to create patch for %s", apk_path);
     }
 }
 
-bool find_package(const char* apkPath) {
-    const std::string findCommand =
-            "/data/local/tmp/deployagent find " + get_packagename_from_apk(apkPath);
-    return !send_shell_command(findCommand);
+int stream_patch(const char* apk_path, APKMetaData metadata, unique_fd patch_fd) {
+    create_patch(apk_path, std::move(metadata), patch_fd);
+
+    REPORT_FUNC_TIME();
+    return read_and_dump(patch_fd.get());
 }
diff --git a/adb/client/fastdeploy.h b/adb/client/fastdeploy.h
index 7b7f2ec..830aeb2 100644
--- a/adb/client/fastdeploy.h
+++ b/adb/client/fastdeploy.h
@@ -16,6 +16,11 @@
 
 #pragma once
 
+#include "adb_unique_fd.h"
+
+#include "fastdeploy/proto/ApkEntry.pb.h"
+
+#include <optional>
 #include <string>
 
 enum FastDeploy_AgentUpdateStrategy {
@@ -24,12 +29,11 @@
     FastDeploy_AgentUpdateDifferentVersion
 };
 
-void fastdeploy_set_local_agent(bool use_localagent);
+void fastdeploy_set_agent_update_strategy(FastDeploy_AgentUpdateStrategy agent_update_strategy);
 int get_device_api_level();
-void update_agent(FastDeploy_AgentUpdateStrategy agentUpdateStrategy);
-void extract_metadata(const char* apkPath, FILE* outputFp);
-void create_patch(const char* apkPath, const char* metadataPath, const char* patchPath);
-void apply_patch_on_device(const char* apkPath, const char* patchPath, const char* outputPath);
-void install_patch(const char* apkPath, const char* patchPath, int argc, const char** argv);
-std::string get_patch_path(const char* apkPath);
-bool find_package(const char* apkPath);
+
+std::optional<com::android::fastdeploy::APKMetaData> extract_metadata(const char* apk_path);
+unique_fd install_patch(int argc, const char** argv);
+unique_fd apply_patch_on_device(const char* output_path);
+int stream_patch(const char* apk_path, com::android::fastdeploy::APKMetaData metadata,
+                 unique_fd patch_fd);
diff --git a/adb/client/fastdeploycallbacks.cpp b/adb/client/fastdeploycallbacks.cpp
index 23a0aca..86ceaa1 100644
--- a/adb/client/fastdeploycallbacks.cpp
+++ b/adb/client/fastdeploycallbacks.cpp
@@ -49,35 +49,7 @@
 int capture_shell_command(const char* command, std::vector<char>* outBuffer,
                           std::vector<char>* errBuffer) {
     DeployAgentBufferCallback cb(outBuffer, errBuffer);
-    return send_shell_command(command, false, &cb);
-}
-
-DeployAgentFileCallback::DeployAgentFileCallback(FILE* outputFile, std::vector<char>* errBuffer) {
-    mpOutFile = outputFile;
-    mpErrBuffer = errBuffer;
-    mBytesWritten = 0;
-}
-
-void DeployAgentFileCallback::OnStdout(const char* buffer, int length) {
-    if (mpOutFile != NULL) {
-        int bytes_written = fwrite(buffer, 1, length, mpOutFile);
-        if (bytes_written != length) {
-            printf("Write error %d\n", bytes_written);
-        }
-        mBytesWritten += bytes_written;
-    }
-}
-
-void DeployAgentFileCallback::OnStderr(const char* buffer, int length) {
-    appendBuffer(mpErrBuffer, buffer, length);
-}
-
-int DeployAgentFileCallback::Done(int status) {
-    return status;
-}
-
-int DeployAgentFileCallback::getBytesWritten() {
-    return mBytesWritten;
+    return send_shell_command(command, /*disable_shell_protocol=*/false, &cb);
 }
 
 DeployAgentBufferCallback::DeployAgentBufferCallback(std::vector<char>* outBuffer,
diff --git a/adb/client/fastdeploycallbacks.h b/adb/client/fastdeploycallbacks.h
index 7e049c5..4a6fb99 100644
--- a/adb/client/fastdeploycallbacks.h
+++ b/adb/client/fastdeploycallbacks.h
@@ -17,23 +17,6 @@
 #pragma once
 
 #include <vector>
-#include "commandline.h"
-
-class DeployAgentFileCallback : public StandardStreamsCallbackInterface {
-  public:
-    DeployAgentFileCallback(FILE* outputFile, std::vector<char>* errBuffer);
-
-    virtual void OnStdout(const char* buffer, int length);
-    virtual void OnStderr(const char* buffer, int length);
-    virtual int Done(int status);
-
-    int getBytesWritten();
-
-  private:
-    FILE* mpOutFile;
-    std::vector<char>* mpErrBuffer;
-    int mBytesWritten;
-};
 
 int capture_shell_command(const char* command, std::vector<char>* outBuffer,
                           std::vector<char>* errBuffer);
diff --git a/adb/client/file_sync_client.cpp b/adb/client/file_sync_client.cpp
index 2db1d85..fbfeb53 100644
--- a/adb/client/file_sync_client.cpp
+++ b/adb/client/file_sync_client.cpp
@@ -872,6 +872,16 @@
     return true;
 }
 
+// dirname("//foo") returns "//", so we can't do the obvious `path == "/"`.
+static bool is_root_dir(std::string_view path) {
+    for (char c : path) {
+        if (c != '/') {
+            return false;
+        }
+    }
+    return true;
+}
+
 static bool copy_local_dir_remote(SyncConnection& sc, std::string lpath,
                                   std::string rpath, bool check_timestamps,
                                   bool list_only) {
@@ -885,8 +895,8 @@
     std::vector<copyinfo> file_list;
     std::vector<std::string> directory_list;
 
-    for (std::string dirpath = rpath; dirpath != "/"; dirpath = android::base::Dirname(dirpath)) {
-        directory_list.push_back(dirpath);
+    for (std::string path = rpath; !is_root_dir(path); path = android::base::Dirname(path)) {
+        directory_list.push_back(path);
     }
     std::reverse(directory_list.begin(), directory_list.end());
 
diff --git a/adb/client/usb_linux.cpp b/adb/client/usb_linux.cpp
index 17b4db1..343e7b5 100644
--- a/adb/client/usb_linux.cpp
+++ b/adb/client/usb_linux.cpp
@@ -406,25 +406,44 @@
     }
 }
 
-int usb_write(usb_handle *h, const void *_data, int len)
-{
+static int usb_write_split(usb_handle* h, unsigned char* data, int len) {
+    for (int i = 0; i < len; i += 16384) {
+        int chunk_size = (i + 16384 > len) ? len - i : 16384;
+        int n = usb_bulk_write(h, data + i, chunk_size);
+        if (n != chunk_size) {
+            D("ERROR: n = %d, errno = %d (%s)", n, errno, strerror(errno));
+            return -1;
+        }
+    }
+
+    return len;
+}
+
+int usb_write(usb_handle* h, const void* _data, int len) {
     D("++ usb_write ++");
 
-    unsigned char *data = (unsigned char*) _data;
+    unsigned char* data = (unsigned char*)_data;
+
+    // The kernel will attempt to allocate a contiguous buffer for each write we submit.
+    // This might fail due to heap fragmentation, so attempt a contiguous write once, and if that
+    // fails, retry after having split the data into 16kB chunks to avoid allocation failure.
     int n = usb_bulk_write(h, data, len);
-    if (n != len) {
-        D("ERROR: n = %d, errno = %d (%s)", n, errno, strerror(errno));
+    if (n == -1 && errno == ENOMEM) {
+        n = usb_write_split(h, data, len);
+    }
+
+    if (n == -1) {
         return -1;
     }
 
     if (h->zero_mask && !(len & h->zero_mask)) {
         // If we need 0-markers and our transfer is an even multiple of the packet size,
         // then send a zero marker.
-        return usb_bulk_write(h, _data, 0) == 0 ? n : -1;
+        return usb_bulk_write(h, _data, 0) == 0 ? len : -1;
     }
 
     D("-- usb_write --");
-    return n;
+    return len;
 }
 
 int usb_read(usb_handle *h, void *_data, int len)
@@ -590,6 +609,7 @@
     while (true) {
         // TODO: Use inotify.
         find_usb_device("/dev/bus/usb", register_device);
+        adb_notify_device_scan_complete();
         kick_disconnected_devices();
         std::this_thread::sleep_for(1s);
     }
diff --git a/adb/client/usb_osx.cpp b/adb/client/usb_osx.cpp
index 5c0da47..7207ca7 100644
--- a/adb/client/usb_osx.cpp
+++ b/adb/client/usb_osx.cpp
@@ -461,6 +461,7 @@
             std::this_thread::sleep_for(100ms);
         }
 
+        adb_notify_device_scan_complete();
         initialized = true;
     }
 }
diff --git a/adb/client/usb_windows.cpp b/adb/client/usb_windows.cpp
index f23c3a5..197c6fa 100644
--- a/adb/client/usb_windows.cpp
+++ b/adb/client/usb_windows.cpp
@@ -172,6 +172,7 @@
 
     while (true) {
         find_devices();
+        adb_notify_device_scan_complete();
         std::this_thread::sleep_for(1s);
     }
 }
diff --git a/adb/daemon/auth.cpp b/adb/daemon/auth.cpp
index 2b8f461..2e84ce6 100644
--- a/adb/daemon/auth.cpp
+++ b/adb/daemon/auth.cpp
@@ -26,9 +26,12 @@
 #include <resolv.h>
 #include <stdio.h>
 #include <string.h>
+#include <iomanip>
 
+#include <algorithm>
 #include <memory>
 
+#include <adbd_auth.h>
 #include <android-base/file.h>
 #include <android-base/strings.h>
 #include <crypto_utils/android_pubkey.h>
@@ -36,59 +39,57 @@
 #include <openssl/rsa.h>
 #include <openssl/sha.h>
 
-static fdevent* listener_fde = nullptr;
-static fdevent* framework_fde = nullptr;
-static int framework_fd = -1;
+static AdbdAuthContext* auth_ctx;
 
-static void usb_disconnected(void* unused, atransport* t);
-static struct adisconnect usb_disconnect = { usb_disconnected, nullptr};
-static atransport* usb_transport;
-static bool needs_retry = false;
+static void adb_disconnected(void* unused, atransport* t);
+static struct adisconnect adb_disconnect = {adb_disconnected, nullptr};
 
 bool auth_required = true;
 
-bool adbd_auth_verify(const char* token, size_t token_size, const std::string& sig) {
-    static constexpr const char* key_paths[] = { "/adb_keys", "/data/misc/adb/adb_keys", nullptr };
+static void IteratePublicKeys(std::function<bool(std::string_view public_key)> f) {
+    adbd_auth_get_public_keys(
+            auth_ctx,
+            [](const char* public_key, size_t len, void* arg) {
+                return (*static_cast<decltype(f)*>(arg))(std::string_view(public_key, len));
+            },
+            &f);
+}
 
-    for (const auto& path : key_paths) {
-        if (access(path, R_OK) == 0) {
-            LOG(INFO) << "Loading keys from " << path;
+bool adbd_auth_verify(const char* token, size_t token_size, const std::string& sig,
+                      std::string* auth_key) {
+    bool authorized = false;
+    auth_key->clear();
 
-            std::string content;
-            if (!android::base::ReadFileToString(path, &content)) {
-                PLOG(ERROR) << "Couldn't read " << path;
-                continue;
-            }
-
-            for (const auto& line : android::base::Split(content, "\n")) {
-                // TODO: do we really have to support both ' ' and '\t'?
-                char* sep = strpbrk(const_cast<char*>(line.c_str()), " \t");
-                if (sep) *sep = '\0';
-
-                // b64_pton requires one additional byte in the target buffer for
-                // decoding to succeed. See http://b/28035006 for details.
-                uint8_t keybuf[ANDROID_PUBKEY_ENCODED_SIZE + 1];
-                if (b64_pton(line.c_str(), keybuf, sizeof(keybuf)) != ANDROID_PUBKEY_ENCODED_SIZE) {
-                    LOG(ERROR) << "Invalid base64 key " << line.c_str() << " in " << path;
-                    continue;
-                }
-
-                RSA* key = nullptr;
-                if (!android_pubkey_decode(keybuf, ANDROID_PUBKEY_ENCODED_SIZE, &key)) {
-                    LOG(ERROR) << "Failed to parse key " << line.c_str() << " in " << path;
-                    continue;
-                }
-
-                bool verified =
-                    (RSA_verify(NID_sha1, reinterpret_cast<const uint8_t*>(token), token_size,
-                                reinterpret_cast<const uint8_t*>(sig.c_str()), sig.size(),
-                                key) == 1);
-                RSA_free(key);
-                if (verified) return true;
-            }
+    IteratePublicKeys([&](std::string_view public_key) {
+        // TODO: do we really have to support both ' ' and '\t'?
+        std::vector<std::string> split = android::base::Split(std::string(public_key), " \t");
+        uint8_t keybuf[ANDROID_PUBKEY_ENCODED_SIZE + 1];
+        const std::string& pubkey = split[0];
+        if (b64_pton(pubkey.c_str(), keybuf, sizeof(keybuf)) != ANDROID_PUBKEY_ENCODED_SIZE) {
+            LOG(ERROR) << "Invalid base64 key " << pubkey;
+            return true;
         }
-    }
-    return false;
+
+        RSA* key = nullptr;
+        if (!android_pubkey_decode(keybuf, ANDROID_PUBKEY_ENCODED_SIZE, &key)) {
+            LOG(ERROR) << "Failed to parse key " << pubkey;
+            return true;
+        }
+
+        bool verified =
+                (RSA_verify(NID_sha1, reinterpret_cast<const uint8_t*>(token), token_size,
+                            reinterpret_cast<const uint8_t*>(sig.c_str()), sig.size(), key) == 1);
+        RSA_free(key);
+        if (verified) {
+            *auth_key = public_key;
+            authorized = true;
+            return false;
+        }
+
+        return true;
+    });
+
+    return authorized;
 }
 
 static bool adbd_auth_generate_token(void* token, size_t token_size) {
@@ -99,87 +100,6 @@
     return okay;
 }
 
-static void usb_disconnected(void* unused, atransport* t) {
-    LOG(INFO) << "USB disconnect";
-    usb_transport = nullptr;
-    needs_retry = false;
-}
-
-static void framework_disconnected() {
-    LOG(INFO) << "Framework disconnect";
-    if (framework_fde) {
-        fdevent_destroy(framework_fde);
-        framework_fd = -1;
-    }
-}
-
-static void adbd_auth_event(int fd, unsigned events, void*) {
-    if (events & FDE_READ) {
-        char response[2];
-        int ret = unix_read(fd, response, sizeof(response));
-        if (ret <= 0) {
-            framework_disconnected();
-        } else if (ret == 2 && response[0] == 'O' && response[1] == 'K') {
-            if (usb_transport) {
-                adbd_auth_verified(usb_transport);
-            }
-        }
-    }
-}
-
-void adbd_auth_confirm_key(const char* key, size_t len, atransport* t) {
-    if (!usb_transport) {
-        usb_transport = t;
-        t->AddDisconnect(&usb_disconnect);
-    }
-
-    if (framework_fd < 0) {
-        LOG(ERROR) << "Client not connected";
-        needs_retry = true;
-        return;
-    }
-
-    if (key[len - 1] != '\0') {
-        LOG(ERROR) << "Key must be a null-terminated string";
-        return;
-    }
-
-    char msg[MAX_PAYLOAD_V1];
-    int msg_len = snprintf(msg, sizeof(msg), "PK%s", key);
-    if (msg_len >= static_cast<int>(sizeof(msg))) {
-        LOG(ERROR) << "Key too long (" << msg_len << ")";
-        return;
-    }
-    LOG(DEBUG) << "Sending '" << msg << "'";
-
-    if (unix_write(framework_fd, msg, msg_len) == -1) {
-        PLOG(ERROR) << "Failed to write PK";
-        return;
-    }
-}
-
-static void adbd_auth_listener(int fd, unsigned events, void* data) {
-    int s = adb_socket_accept(fd, nullptr, nullptr);
-    if (s < 0) {
-        PLOG(ERROR) << "Failed to accept";
-        return;
-    }
-
-    if (framework_fd >= 0) {
-        LOG(WARNING) << "adb received framework auth socket connection again";
-        framework_disconnected();
-    }
-
-    framework_fd = s;
-    framework_fde = fdevent_create(framework_fd, adbd_auth_event, nullptr);
-    fdevent_add(framework_fde, FDE_READ);
-
-    if (needs_retry) {
-        needs_retry = false;
-        send_auth_request(usb_transport);
-    }
-}
-
 void adbd_cloexec_auth_socket() {
     int fd = android_get_control_socket("adbd");
     if (fd == -1) {
@@ -189,20 +109,23 @@
     fcntl(fd, F_SETFD, FD_CLOEXEC);
 }
 
+static void adbd_auth_key_authorized(void* arg, uint64_t id) {
+    LOG(INFO) << "adb client authorized";
+    auto* transport = static_cast<atransport*>(arg);
+    transport->auth_id = id;
+    adbd_auth_verified(transport);
+}
+
 void adbd_auth_init(void) {
-    int fd = android_get_control_socket("adbd");
-    if (fd == -1) {
-        PLOG(ERROR) << "Failed to get adbd socket";
-        return;
-    }
-
-    if (listen(fd, 4) == -1) {
-        PLOG(ERROR) << "Failed to listen on '" << fd << "'";
-        return;
-    }
-
-    listener_fde = fdevent_create(fd, adbd_auth_listener, nullptr);
-    fdevent_add(listener_fde, FDE_READ);
+    AdbdAuthCallbacks cb;
+    cb.version = 1;
+    cb.callbacks.v1.key_authorized = adbd_auth_key_authorized;
+    auth_ctx = adbd_auth_new(&cb);
+    std::thread([]() {
+        adb_thread_setname("adbd auth");
+        adbd_auth_run(auth_ctx);
+        LOG(FATAL) << "auth thread terminated";
+    }).detach();
 }
 
 void send_auth_request(atransport* t) {
@@ -226,3 +149,18 @@
     handle_online(t);
     send_connect(t);
 }
+
+static void adb_disconnected(void* unused, atransport* t) {
+    LOG(INFO) << "ADB disconnect";
+    adbd_auth_notify_disconnect(auth_ctx, t->auth_id);
+}
+
+void adbd_auth_confirm_key(atransport* t) {
+    LOG(INFO) << "prompting user to authorize key";
+    t->AddDisconnect(&adb_disconnect);
+    adbd_auth_prompt_user(auth_ctx, t->auth_key.data(), t->auth_key.size(), t);
+}
+
+void adbd_notify_framework_connected_key(atransport* t) {
+    adbd_auth_notify_auth(auth_ctx, t->auth_key.data(), t->auth_key.size());
+}
diff --git a/adb/daemon/main.cpp b/adb/daemon/main.cpp
index e5a4917..7277cc8 100644
--- a/adb/daemon/main.cpp
+++ b/adb/daemon/main.cpp
@@ -205,7 +205,11 @@
     // descriptor will always be open.
     adbd_cloexec_auth_socket();
 
-#if defined(ALLOW_ADBD_NO_AUTH)
+#if defined(__ANDROID_RECOVERY__)
+    if (is_device_unlocked() || __android_log_is_debuggable()) {
+        auth_required = false;
+    }
+#elif defined(ALLOW_ADBD_NO_AUTH)
     // If ro.adb.secure is unset, default to no authentication required.
     auth_required = android::base::GetBoolProperty("ro.adb.secure", false);
 #elif defined(__ANDROID__)
@@ -214,8 +218,6 @@
     }
 #endif
 
-    adbd_auth_init();
-
     // Our external storage path may be different than apps, since
     // we aren't able to bind mount after dropping root.
     const char* adb_external_storage = getenv("ADB_EXTERNAL_STORAGE");
@@ -230,6 +232,9 @@
     drop_privileges(server_port);
 #endif
 
+    // adbd_auth_init will spawn a thread, so we need to defer it until after selinux transitions.
+    adbd_auth_init();
+
     bool is_usb = false;
 
 #if defined(__ANDROID__)
@@ -248,6 +253,12 @@
         prop_port = android::base::GetProperty("persist.adb.tcp.port", "");
     }
 
+#if !defined(__ANDROID__)
+    if (prop_port.empty() && getenv("ADBD_PORT")) {
+        prop_port = getenv("ADBD_PORT");
+    }
+#endif
+
     int port;
     if (sscanf(prop_port.c_str(), "%d", &port) == 1 && port > 0) {
         D("using port=%d", port);
diff --git a/adb/daemon/reboot_service.cpp b/adb/daemon/reboot_service.cpp
deleted file mode 100644
index 13398af..0000000
--- a/adb/daemon/reboot_service.cpp
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define TRACE_TAG SERVICES
-
-#include "sysdeps.h"
-
-#include <stdlib.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <unistd.h>
-
-#include <string>
-
-#include <android-base/logging.h>
-#include <android-base/properties.h>
-#include <android-base/stringprintf.h>
-#include <bootloader_message/bootloader_message.h>
-#include <cutils/android_reboot.h>
-
-#include "adb_io.h"
-#include "adb_unique_fd.h"
-
-void reboot_service(unique_fd fd, const std::string& arg) {
-    std::string reboot_arg = arg;
-    sync();
-
-    if (reboot_arg.empty()) reboot_arg = "adb";
-    std::string reboot_string = android::base::StringPrintf("reboot,%s", reboot_arg.c_str());
-
-    if (reboot_arg == "fastboot" &&
-        android::base::GetBoolProperty("ro.boot.dynamic_partitions", false) &&
-        access("/dev/socket/recovery", F_OK) == 0) {
-        LOG(INFO) << "Recovery specific reboot fastboot";
-        /*
-         * The socket is created to allow switching between recovery and
-         * fastboot.
-         */
-        android::base::unique_fd sock(socket(AF_UNIX, SOCK_STREAM, 0));
-        if (sock < 0) {
-            WriteFdFmt(fd, "reboot (%s) create\n", strerror(errno));
-            PLOG(ERROR) << "Creating recovery socket failed";
-            return;
-        }
-
-        sockaddr_un addr = {.sun_family = AF_UNIX};
-        strncpy(addr.sun_path, "/dev/socket/recovery", sizeof(addr.sun_path) - 1);
-        if (connect(sock.get(), reinterpret_cast<sockaddr*>(&addr), sizeof(addr)) == -1) {
-            WriteFdFmt(fd, "reboot (%s) connect\n", strerror(errno));
-            PLOG(ERROR) << "Couldn't connect to recovery socket";
-            return;
-        }
-        const char msg_switch_to_fastboot = 'f';
-        auto ret = adb_write(sock, &msg_switch_to_fastboot, sizeof(msg_switch_to_fastboot));
-        if (ret != sizeof(msg_switch_to_fastboot)) {
-            WriteFdFmt(fd, "reboot (%s) write\n", strerror(errno));
-            PLOG(ERROR) << "Couldn't write message to recovery socket to switch to fastboot";
-            return;
-        }
-    } else {
-        if (!android::base::SetProperty(ANDROID_RB_PROPERTY, reboot_string)) {
-            WriteFdFmt(fd.get(), "reboot (%s) failed\n", reboot_string.c_str());
-            return;
-        }
-    }
-    // Don't return early. Give the reboot command time to take effect
-    // to avoid messing up scripts which do "adb reboot && adb wait-for-device"
-    while (true) {
-        pause();
-    }
-}
diff --git a/adb/daemon/reboot_service.h b/adb/daemon/reboot_service.h
deleted file mode 100644
index f68913e..0000000
--- a/adb/daemon/reboot_service.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <string>
-
-#include "adb_unique_fd.h"
-
-#if defined(__ANDROID__)
-void reboot_service(unique_fd fd, const std::string& arg);
-#endif
diff --git a/adb/daemon/remount_service.cpp b/adb/daemon/remount_service.cpp
deleted file mode 100644
index ce494ee..0000000
--- a/adb/daemon/remount_service.cpp
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-#include <string>
-
-#include "adb.h"
-#include "adb_io.h"
-#include "adb_unique_fd.h"
-
-static constexpr char kRemountCmd[] = "/system/bin/remount";
-
-static bool do_remount(int fd, const std::string& cmd) {
-    if (getuid() != 0) {
-        WriteFdExactly(fd, "Not running as root. Try \"adb root\" first.\n");
-        return false;
-    }
-
-    auto pid = fork();
-    if (pid < 0) {
-        WriteFdFmt(fd, "Failed to fork to %s: %s\n", kRemountCmd, strerror(errno));
-        return false;
-    }
-
-    if (pid == 0) {
-        // child side of the fork
-        dup2(fd, STDIN_FILENO);
-        dup2(fd, STDOUT_FILENO);
-        dup2(fd, STDERR_FILENO);
-
-        execl(kRemountCmd, kRemountCmd, cmd.empty() ? nullptr : cmd.c_str(), nullptr);
-        _exit(errno);
-    }
-
-    int wstatus = 0;
-    auto ret = waitpid(pid, &wstatus, 0);
-
-    if (ret == -1) {
-        WriteFdFmt(fd, "Failed to wait for %s: %s\n", kRemountCmd, strerror(errno));
-        return false;
-    } else if (ret != pid) {
-        WriteFdFmt(fd, "pid %d and waitpid return %d do not match for %s\n",
-                   static_cast<int>(pid), static_cast<int>(ret), kRemountCmd);
-        return false;
-    }
-
-    if (WIFSIGNALED(wstatus)) {
-        WriteFdFmt(fd, "%s terminated with signal %s\n", kRemountCmd,
-                   strsignal(WTERMSIG(wstatus)));
-        return false;
-    }
-
-    if (!WIFEXITED(wstatus)) {
-        WriteFdFmt(fd, "%s stopped with status 0x%x\n", kRemountCmd, wstatus);
-        return false;
-    }
-
-    if (WEXITSTATUS(wstatus)) {
-        WriteFdFmt(fd, "%s exited with status %d\n", kRemountCmd, WEXITSTATUS(wstatus));
-        return false;
-    }
-
-    return true;
-}
-
-void remount_service(unique_fd fd, const std::string& cmd) {
-    const char* success = do_remount(fd.get(), cmd) ? "succeeded" : "failed";
-    WriteFdFmt(fd.get(), "remount %s\n", success);
-}
diff --git a/adb/daemon/remount_service.h b/adb/daemon/remount_service.h
deleted file mode 100644
index 522a5da..0000000
--- a/adb/daemon/remount_service.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <string>
-
-#include "adb_unique_fd.h"
-
-#if defined(__ANDROID__)
-void remount_service(unique_fd, const std::string&);
-#endif
diff --git a/adb/daemon/services.cpp b/adb/daemon/services.cpp
index e6f4499..4ec90d2 100644
--- a/adb/daemon/services.cpp
+++ b/adb/daemon/services.cpp
@@ -39,6 +39,7 @@
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
+#include <cutils/android_reboot.h>
 #include <cutils/sockets.h>
 #include <log/log_properties.h>
 
@@ -53,10 +54,7 @@
 
 #include "daemon/file_sync_service.h"
 #include "daemon/framebuffer_service.h"
-#include "daemon/reboot_service.h"
-#include "daemon/remount_service.h"
 #include "daemon/restart_service.h"
-#include "daemon/set_verity_enable_state_service.h"
 #include "daemon/shell_service.h"
 
 
@@ -143,6 +141,26 @@
     WriteFdExactly(fd.get(), "spinning\n");
 }
 
+[[maybe_unused]] static unique_fd reboot_device(const std::string& name) {
+#if defined(__ANDROID_RECOVERY__)
+    if (!__android_log_is_debuggable()) {
+        auto reboot_service = [name](unique_fd fd) {
+            std::string reboot_string = android::base::StringPrintf("reboot,%s", name.c_str());
+            if (!android::base::SetProperty(ANDROID_RB_PROPERTY, reboot_string)) {
+                WriteFdFmt(fd.get(), "reboot (%s) failed\n", reboot_string.c_str());
+                return;
+            }
+            while (true) pause();
+        };
+        return create_service_thread("reboot", reboot_service);
+    }
+#endif
+    // Fall through
+    std::string cmd = "/system/bin/reboot ";
+    cmd += name;
+    return StartSubprocess(cmd, nullptr, SubprocessType::kRaw, SubprocessProtocol::kNone);
+}
+
 struct ServiceSocket : public asocket {
     ServiceSocket() {
         install_local_socket(this);
@@ -251,13 +269,11 @@
     if (name.starts_with("framebuffer:")) {
         return create_service_thread("fb", framebuffer_service);
     } else if (android::base::ConsumePrefix(&name, "remount:")) {
-        std::string arg(name);
-        return create_service_thread("remount",
-                                     std::bind(remount_service, std::placeholders::_1, arg));
+        std::string cmd = "/system/bin/remount ";
+        cmd += name;
+        return StartSubprocess(cmd, nullptr, SubprocessType::kRaw, SubprocessProtocol::kNone);
     } else if (android::base::ConsumePrefix(&name, "reboot:")) {
-        std::string arg(name);
-        return create_service_thread("reboot",
-                                     std::bind(reboot_service, std::placeholders::_1, arg));
+        return reboot_device(std::string(name));
     } else if (name.starts_with("root:")) {
         return create_service_thread("root", restart_root_service);
     } else if (name.starts_with("unroot:")) {
@@ -270,11 +286,11 @@
         return StartSubprocess("/system/bin/bu restore", nullptr, SubprocessType::kRaw,
                                SubprocessProtocol::kNone);
     } else if (name.starts_with("disable-verity:")) {
-        return create_service_thread("verity-on", std::bind(set_verity_enabled_state_service,
-                                                            std::placeholders::_1, false));
+        return StartSubprocess("/system/bin/disable-verity", nullptr, SubprocessType::kRaw,
+                               SubprocessProtocol::kNone);
     } else if (name.starts_with("enable-verity:")) {
-        return create_service_thread("verity-off", std::bind(set_verity_enabled_state_service,
-                                                             std::placeholders::_1, true));
+        return StartSubprocess("/system/bin/enable-verity", nullptr, SubprocessType::kRaw,
+                               SubprocessProtocol::kNone);
     } else if (android::base::ConsumePrefix(&name, "tcpip:")) {
         std::string str(name);
 
diff --git a/adb/daemon/set_verity_enable_state_service.cpp b/adb/daemon/set_verity_enable_state_service.cpp
deleted file mode 100644
index 4fbccdb..0000000
--- a/adb/daemon/set_verity_enable_state_service.cpp
+++ /dev/null
@@ -1,250 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define TRACE_TAG ADB
-
-#include "set_verity_enable_state_service.h"
-#include "sysdeps.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <libavb_user/libavb_user.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <sys/mount.h>
-#include <sys/stat.h>
-
-#include <android-base/properties.h>
-#include <android-base/stringprintf.h>
-#include <fs_mgr.h>
-#include <fs_mgr_overlayfs.h>
-#include <fstab/fstab.h>
-#include <log/log_properties.h>
-
-#include "adb.h"
-#include "adb_io.h"
-#include "adb_unique_fd.h"
-
-#include "fec/io.h"
-
-#ifdef ALLOW_ADBD_DISABLE_VERITY
-static const bool kAllowDisableVerity = true;
-#else
-static const bool kAllowDisableVerity = false;
-#endif
-
-void suggest_run_adb_root(int fd) {
-    if (getuid() != 0) WriteFdExactly(fd, "Maybe run adb root?\n");
-}
-
-static bool make_block_device_writable(const std::string& dev) {
-    unique_fd fd(unix_open(dev, O_RDONLY | O_CLOEXEC));
-    if (fd == -1) {
-        return false;
-    }
-
-    int OFF = 0;
-    bool result = (ioctl(fd.get(), BLKROSET, &OFF) != -1);
-    return result;
-}
-
-/* Turn verity on/off */
-static bool set_verity_enabled_state(int fd, const char* block_device, const char* mount_point,
-                                     bool enable) {
-    if (!make_block_device_writable(block_device)) {
-        WriteFdFmt(fd, "Could not make block device %s writable (%s).\n",
-                   block_device, strerror(errno));
-        return false;
-    }
-
-    fec::io fh(block_device, O_RDWR);
-
-    if (!fh) {
-        WriteFdFmt(fd, "Could not open block device %s (%s).\n", block_device, strerror(errno));
-        suggest_run_adb_root(fd);
-        return false;
-    }
-
-    fec_verity_metadata metadata;
-
-    if (!fh.get_verity_metadata(metadata)) {
-        WriteFdExactly(fd, "Couldn't find verity metadata!\n");
-        return false;
-    }
-
-    if (!enable && metadata.disabled) {
-        WriteFdFmt(fd, "Verity already disabled on %s\n", mount_point);
-        return false;
-    }
-
-    if (enable && !metadata.disabled) {
-        WriteFdFmt(fd, "Verity already enabled on %s\n", mount_point);
-        return false;
-    }
-
-    if (!fh.set_verity_status(enable)) {
-        WriteFdFmt(fd, "Could not set verity %s flag on device %s with error %s\n",
-                   enable ? "enabled" : "disabled",
-                   block_device, strerror(errno));
-        return false;
-    }
-
-    auto change = false;
-    errno = 0;
-    if (enable ? fs_mgr_overlayfs_teardown(mount_point, &change)
-               : fs_mgr_overlayfs_setup(nullptr, mount_point, &change)) {
-        if (change) {
-            WriteFdFmt(fd, "%s overlayfs for %s\n", enable ? "disabling" : "using", mount_point);
-        }
-    } else if (errno) {
-        int expected_errno = enable ? EBUSY : ENOENT;
-        if (errno != expected_errno) {
-            WriteFdFmt(fd, "Overlayfs %s for %s failed with error %s\n",
-                       enable ? "teardown" : "setup", mount_point, strerror(errno));
-        }
-    }
-    WriteFdFmt(fd, "Verity %s on %s\n", enable ? "enabled" : "disabled", mount_point);
-    return true;
-}
-
-/* Helper function to get A/B suffix, if any. If the device isn't
- * using A/B the empty string is returned. Otherwise either "_a",
- * "_b", ... is returned.
- */
-static std::string get_ab_suffix() {
-    return android::base::GetProperty("ro.boot.slot_suffix", "");
-}
-
-static bool is_avb_device_locked() {
-    return android::base::GetProperty("ro.boot.vbmeta.device_state", "") == "locked";
-}
-
-static bool overlayfs_setup(int fd, bool enable) {
-    auto change = false;
-    errno = 0;
-    if (enable ? fs_mgr_overlayfs_teardown(nullptr, &change)
-               : fs_mgr_overlayfs_setup(nullptr, nullptr, &change)) {
-        if (change) {
-            WriteFdFmt(fd, "%s overlayfs\n", enable ? "disabling" : "using");
-        }
-    } else if (errno) {
-        WriteFdFmt(fd, "Overlayfs %s failed with error %s\n", enable ? "teardown" : "setup",
-                   strerror(errno));
-        suggest_run_adb_root(fd);
-    }
-    return change;
-}
-
-/* Use AVB to turn verity on/off */
-static bool set_avb_verity_enabled_state(int fd, AvbOps* ops, bool enable_verity) {
-    std::string ab_suffix = get_ab_suffix();
-    bool verity_enabled;
-
-    if (is_avb_device_locked()) {
-        WriteFdExactly(fd, "Device is locked. Please unlock the device first\n");
-        return false;
-    }
-
-    if (!avb_user_verity_get(ops, ab_suffix.c_str(), &verity_enabled)) {
-        WriteFdExactly(fd, "Error getting verity state. Try adb root first?\n");
-        return false;
-    }
-
-    if ((verity_enabled && enable_verity) || (!verity_enabled && !enable_verity)) {
-        WriteFdFmt(fd, "verity is already %s\n", verity_enabled ? "enabled" : "disabled");
-        return false;
-    }
-
-    if (!avb_user_verity_set(ops, ab_suffix.c_str(), enable_verity)) {
-        WriteFdExactly(fd, "Error setting verity\n");
-        return false;
-    }
-
-    overlayfs_setup(fd, enable_verity);
-    WriteFdFmt(fd, "Successfully %s verity\n", enable_verity ? "enabled" : "disabled");
-    return true;
-}
-
-void set_verity_enabled_state_service(unique_fd fd, bool enable) {
-    bool any_changed = false;
-
-    // Figure out if we're using VB1.0 or VB2.0 (aka AVB) - by
-    // contract, androidboot.vbmeta.digest is set by the bootloader
-    // when using AVB).
-    bool using_avb = !android::base::GetProperty("ro.boot.vbmeta.digest", "").empty();
-
-    // If using AVB, dm-verity is used on any build so we want it to
-    // be possible to disable/enable on any build (except USER). For
-    // VB1.0 dm-verity is only enabled on certain builds.
-    if (!using_avb) {
-        if (!kAllowDisableVerity) {
-            WriteFdFmt(fd.get(), "%s-verity only works for userdebug builds\n",
-                       enable ? "enable" : "disable");
-        }
-
-        if (!android::base::GetBoolProperty("ro.secure", false)) {
-            overlayfs_setup(fd.get(), enable);
-            WriteFdExactly(fd.get(), "verity not enabled - ENG build\n");
-            return;
-        }
-    }
-
-    // Should never be possible to disable dm-verity on a USER build
-    // regardless of using AVB or VB1.0.
-    if (!__android_log_is_debuggable()) {
-        WriteFdExactly(fd.get(), "verity cannot be disabled/enabled - USER build\n");
-        return;
-    }
-
-    if (using_avb) {
-        // Yep, the system is using AVB.
-        AvbOps* ops = avb_ops_user_new();
-        if (ops == nullptr) {
-            WriteFdExactly(fd.get(), "Error getting AVB ops\n");
-            return;
-        }
-        if (set_avb_verity_enabled_state(fd.get(), ops, enable)) {
-            any_changed = true;
-        }
-        avb_ops_user_free(ops);
-    } else {
-        // Not using AVB - assume VB1.0.
-
-        // read all fstab entries at once from all sources
-        android::fs_mgr::Fstab fstab;
-        if (!android::fs_mgr::ReadDefaultFstab(&fstab)) {
-            WriteFdExactly(fd.get(), "Failed to read fstab\n");
-            suggest_run_adb_root(fd.get());
-            return;
-        }
-
-        // Loop through entries looking for ones that verity manages.
-        for (const auto& entry : fstab) {
-            if (entry.fs_mgr_flags.verify) {
-                if (set_verity_enabled_state(fd.get(), entry.blk_device.c_str(),
-                                             entry.mount_point.c_str(), enable)) {
-                    any_changed = true;
-                }
-            }
-        }
-    }
-    if (!any_changed) any_changed = overlayfs_setup(fd.get(), enable);
-
-    if (any_changed) {
-        WriteFdExactly(fd.get(), "Now reboot your device for settings to take effect\n");
-    }
-}
diff --git a/adb/daemon/usb.cpp b/adb/daemon/usb.cpp
index f4aa9fb..a9ad805 100644
--- a/adb/daemon/usb.cpp
+++ b/adb/daemon/usb.cpp
@@ -117,14 +117,18 @@
     }
 };
 
+template <class Payload>
 struct IoBlock {
     bool pending = false;
     struct iocb control = {};
-    std::shared_ptr<Block> payload;
+    Payload payload;
 
     TransferId id() const { return TransferId::from_value(control.aio_data); }
 };
 
+using IoReadBlock = IoBlock<Block>;
+using IoWriteBlock = IoBlock<std::shared_ptr<Block>>;
+
 struct ScopedAioContext {
     ScopedAioContext() = default;
     ~ScopedAioContext() { reset(); }
@@ -208,16 +212,17 @@
 
     virtual bool Write(std::unique_ptr<apacket> packet) override final {
         LOG(DEBUG) << "USB write: " << dump_header(&packet->msg);
-        Block header(sizeof(packet->msg));
-        memcpy(header.data(), &packet->msg, sizeof(packet->msg));
+        auto header = std::make_shared<Block>(sizeof(packet->msg));
+        memcpy(header->data(), &packet->msg, sizeof(packet->msg));
 
         std::lock_guard<std::mutex> lock(write_mutex_);
-        write_requests_.push_back(CreateWriteBlock(std::move(header), next_write_id_++));
+        write_requests_.push_back(
+                CreateWriteBlock(std::move(header), 0, sizeof(packet->msg), next_write_id_++));
         if (!packet->payload.empty()) {
             // The kernel attempts to allocate a contiguous block of memory for each write,
             // which can fail if the write is large and the kernel heap is fragmented.
             // Split large writes into smaller chunks to avoid this.
-            std::shared_ptr<Block> payload = std::make_shared<Block>(std::move(packet->payload));
+            auto payload = std::make_shared<Block>(std::move(packet->payload));
             size_t offset = 0;
             size_t len = payload->size();
 
@@ -464,16 +469,20 @@
         worker_thread_.join();
     }
 
-    void PrepareReadBlock(IoBlock* block, uint64_t id) {
+    void PrepareReadBlock(IoReadBlock* block, uint64_t id) {
         block->pending = false;
-        block->payload = std::make_shared<Block>(kUsbReadSize);
+        if (block->payload.capacity() >= kUsbReadSize) {
+            block->payload.resize(kUsbReadSize);
+        } else {
+            block->payload = Block(kUsbReadSize);
+        }
         block->control.aio_data = static_cast<uint64_t>(TransferId::read(id));
-        block->control.aio_buf = reinterpret_cast<uintptr_t>(block->payload->data());
-        block->control.aio_nbytes = block->payload->size();
+        block->control.aio_buf = reinterpret_cast<uintptr_t>(block->payload.data());
+        block->control.aio_nbytes = block->payload.size();
     }
 
-    IoBlock CreateReadBlock(uint64_t id) {
-        IoBlock block;
+    IoReadBlock CreateReadBlock(uint64_t id) {
+        IoReadBlock block;
         PrepareReadBlock(&block, id);
         block.control.aio_rw_flags = 0;
         block.control.aio_lio_opcode = IOCB_CMD_PREAD;
@@ -509,62 +518,50 @@
             }
 
             if (id.direction == TransferDirection::READ) {
-                if (!HandleRead(id, event.res)) {
-                    return;
-                }
+                HandleRead(id, event.res);
             } else {
                 HandleWrite(id);
             }
         }
     }
 
-    bool HandleRead(TransferId id, int64_t size) {
+    void HandleRead(TransferId id, int64_t size) {
         uint64_t read_idx = id.id % kUsbReadQueueDepth;
-        IoBlock* block = &read_requests_[read_idx];
+        IoReadBlock* block = &read_requests_[read_idx];
         block->pending = false;
-        block->payload->resize(size);
+        block->payload.resize(size);
 
         // Notification for completed reads can be received out of order.
         if (block->id().id != needed_read_id_) {
             LOG(VERBOSE) << "read " << block->id().id << " completed while waiting for "
                          << needed_read_id_;
-            return true;
+            return;
         }
 
         for (uint64_t id = needed_read_id_;; ++id) {
             size_t read_idx = id % kUsbReadQueueDepth;
-            IoBlock* current_block = &read_requests_[read_idx];
+            IoReadBlock* current_block = &read_requests_[read_idx];
             if (current_block->pending) {
                 break;
             }
-            if (!ProcessRead(current_block)) {
-                return false;
-            }
+            ProcessRead(current_block);
             ++needed_read_id_;
         }
-
-        return true;
     }
 
-    bool ProcessRead(IoBlock* block) {
-        if (!block->payload->empty()) {
+    void ProcessRead(IoReadBlock* block) {
+        if (!block->payload.empty()) {
             if (!incoming_header_.has_value()) {
-                if (block->payload->size() != sizeof(amessage)) {
-                    HandleError("received packet of unexpected length while reading header");
-                    return false;
-                }
-                amessage msg;
-                memcpy(&msg, block->payload->data(), sizeof(amessage));
+                CHECK_EQ(sizeof(amessage), block->payload.size());
+                amessage& msg = incoming_header_.emplace();
+                memcpy(&msg, block->payload.data(), sizeof(msg));
                 LOG(DEBUG) << "USB read:" << dump_header(&msg);
                 incoming_header_ = msg;
             } else {
                 size_t bytes_left = incoming_header_->data_length - incoming_payload_.size();
-                Block payload = std::move(*block->payload);
-                if (block->payload->size() > bytes_left) {
-                    HandleError("received too many bytes while waiting for payload");
-                    return false;
-                }
-                incoming_payload_.append(std::make_unique<Block>(std::move(payload)));
+                Block payload = std::move(block->payload);
+                CHECK_LE(payload.size(), bytes_left);
+                incoming_payload_.append(std::move(payload));
             }
 
             if (incoming_header_->data_length == incoming_payload_.size()) {
@@ -572,20 +569,23 @@
                 packet->msg = *incoming_header_;
 
                 // TODO: Make apacket contain an IOVector so we don't have to coalesce.
-                packet->payload = incoming_payload_.coalesce();
+                packet->payload = std::move(incoming_payload_).coalesce();
                 read_callback_(this, std::move(packet));
 
                 incoming_header_.reset();
-                incoming_payload_.clear();
+                // reuse the capacity of the incoming payload while we can.
+                auto free_block = incoming_payload_.clear();
+                if (block->payload.capacity() == 0) {
+                    block->payload = std::move(free_block);
+                }
             }
         }
 
         PrepareReadBlock(block, block->id().id + kUsbReadQueueDepth);
         SubmitRead(block);
-        return true;
     }
 
-    bool SubmitRead(IoBlock* block) {
+    bool SubmitRead(IoReadBlock* block) {
         block->pending = true;
         struct iocb* iocb = &block->control;
         if (io_submit(aio_context_.get(), 1, &iocb) != 1) {
@@ -607,7 +607,7 @@
         std::lock_guard<std::mutex> lock(write_mutex_);
         auto it =
                 std::find_if(write_requests_.begin(), write_requests_.end(), [id](const auto& req) {
-                    return static_cast<uint64_t>(req->id()) == static_cast<uint64_t>(id);
+                    return static_cast<uint64_t>(req.id()) == static_cast<uint64_t>(id);
                 });
         CHECK(it != write_requests_.end());
 
@@ -618,27 +618,26 @@
         SubmitWrites();
     }
 
-    std::unique_ptr<IoBlock> CreateWriteBlock(std::shared_ptr<Block> payload, size_t offset,
-                                              size_t len, uint64_t id) {
-        auto block = std::make_unique<IoBlock>();
-        block->payload = std::move(payload);
-        block->control.aio_data = static_cast<uint64_t>(TransferId::write(id));
-        block->control.aio_rw_flags = 0;
-        block->control.aio_lio_opcode = IOCB_CMD_PWRITE;
-        block->control.aio_reqprio = 0;
-        block->control.aio_fildes = write_fd_.get();
-        block->control.aio_buf = reinterpret_cast<uintptr_t>(block->payload->data() + offset);
-        block->control.aio_nbytes = len;
-        block->control.aio_offset = 0;
-        block->control.aio_flags = IOCB_FLAG_RESFD;
-        block->control.aio_resfd = worker_event_fd_.get();
+    IoWriteBlock CreateWriteBlock(std::shared_ptr<Block> payload, size_t offset, size_t len,
+                                  uint64_t id) {
+        auto block = IoWriteBlock();
+        block.payload = std::move(payload);
+        block.control.aio_data = static_cast<uint64_t>(TransferId::write(id));
+        block.control.aio_rw_flags = 0;
+        block.control.aio_lio_opcode = IOCB_CMD_PWRITE;
+        block.control.aio_reqprio = 0;
+        block.control.aio_fildes = write_fd_.get();
+        block.control.aio_buf = reinterpret_cast<uintptr_t>(block.payload->data() + offset);
+        block.control.aio_nbytes = len;
+        block.control.aio_offset = 0;
+        block.control.aio_flags = IOCB_FLAG_RESFD;
+        block.control.aio_resfd = worker_event_fd_.get();
         return block;
     }
 
-    std::unique_ptr<IoBlock> CreateWriteBlock(Block payload, uint64_t id) {
-        std::shared_ptr<Block> block = std::make_shared<Block>(std::move(payload));
-        size_t len = block->size();
-        return CreateWriteBlock(std::move(block), 0, len, id);
+    IoWriteBlock CreateWriteBlock(Block&& payload, uint64_t id) {
+        size_t len = payload.size();
+        return CreateWriteBlock(std::make_shared<Block>(std::move(payload)), 0, len, id);
     }
 
     void SubmitWrites() REQUIRES(write_mutex_) {
@@ -655,9 +654,9 @@
 
         struct iocb* iocbs[kUsbWriteQueueDepth];
         for (int i = 0; i < writes_to_submit; ++i) {
-            CHECK(!write_requests_[writes_submitted_ + i]->pending);
-            write_requests_[writes_submitted_ + i]->pending = true;
-            iocbs[i] = &write_requests_[writes_submitted_ + i]->control;
+            CHECK(!write_requests_[writes_submitted_ + i].pending);
+            write_requests_[writes_submitted_ + i].pending = true;
+            iocbs[i] = &write_requests_[writes_submitted_ + i].control;
             LOG(VERBOSE) << "submitting write_request " << static_cast<void*>(iocbs[i]);
         }
 
@@ -702,7 +701,7 @@
     std::optional<amessage> incoming_header_;
     IOVector incoming_payload_;
 
-    std::array<IoBlock, kUsbReadQueueDepth> read_requests_;
+    std::array<IoReadBlock, kUsbReadQueueDepth> read_requests_;
     IOVector read_data_;
 
     // ID of the next request that we're going to send out.
@@ -712,7 +711,7 @@
     size_t needed_read_id_ = 0;
 
     std::mutex write_mutex_;
-    std::deque<std::unique_ptr<IoBlock>> write_requests_ GUARDED_BY(write_mutex_);
+    std::deque<IoWriteBlock> write_requests_ GUARDED_BY(write_mutex_);
     size_t next_write_id_ GUARDED_BY(write_mutex_) = 0;
     size_t writes_submitted_ GUARDED_BY(write_mutex_) = 0;
 
diff --git a/adb/daemon/usb_ffs.cpp b/adb/daemon/usb_ffs.cpp
index a64ce40..338d776 100644
--- a/adb/daemon/usb_ffs.cpp
+++ b/adb/daemon/usb_ffs.cpp
@@ -299,7 +299,6 @@
         }
         // Signal only when writing the descriptors to ffs
         android::base::SetProperty("sys.usb.ffs.ready", "1");
-        *out_control = std::move(control);
     }
 
     bulk_out.reset(adb_open(USB_FFS_ADB_OUT, O_RDONLY));
@@ -314,6 +313,7 @@
         return false;
     }
 
+    *out_control = std::move(control);
     *out_bulk_in = std::move(bulk_in);
     *out_bulk_out = std::move(bulk_out);
     return true;
diff --git a/adb/fastdeploy/Android.bp b/adb/fastdeploy/Android.bp
index 95e1a28..f5893aa 100644
--- a/adb/fastdeploy/Android.bp
+++ b/adb/fastdeploy/Android.bp
@@ -13,15 +13,77 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //
-java_binary {
-    name: "deployagent",
+java_library {
+    name: "deployagent_lib",
     sdk_version: "24",
-    srcs: ["deployagent/src/**/*.java", "deploylib/src/**/*.java", "proto/**/*.proto"],
-    static_libs: ["apkzlib_zip"],
+    srcs: [
+        "deployagent/src/**/*.java",
+        "proto/**/*.proto",
+    ],
     proto: {
         type: "lite",
     },
+}
+
+java_binary {
+    name: "deployagent",
+    sdk_version: "24",
+    static_libs: [
+        "deployagent_lib",
+    ],
     dex_preopt: {
         enabled: false,
     }
-}
\ No newline at end of file
+}
+
+android_test {
+    name: "FastDeployTests",
+
+    manifest: "AndroidManifest.xml",
+
+    srcs: [
+        "deployagent/test/com/android/fastdeploy/ApkArchiveTest.java",
+    ],
+
+    static_libs: [
+        "androidx.test.core",
+        "androidx.test.runner",
+        "androidx.test.rules",
+        "deployagent_lib",
+        "mockito-target-inline-minus-junit4",
+    ],
+
+    libs: [
+        "android.test.runner",
+        "android.test.base",
+        "android.test.mock",
+    ],
+
+    data: [
+        "testdata/sample.apk",
+        "testdata/sample.cd",
+    ],
+
+    optimize: {
+        enabled: false,
+    },
+}
+
+java_test_host {
+    name: "FastDeployHostTests",
+    srcs: [
+        "deployagent/test/com/android/fastdeploy/FastDeployTest.java",
+    ],
+    data: [
+        "testdata/helloworld5.apk",
+        "testdata/helloworld7.apk",
+    ],
+    libs: [
+        "compatibility-host-util",
+        "cts-tradefed",
+        "tradefed",
+    ],
+    test_suites: [
+        "general-tests",
+    ],
+}
diff --git a/adb/fastdeploy/AndroidManifest.xml b/adb/fastdeploy/AndroidManifest.xml
new file mode 100644
index 0000000..89dc745
--- /dev/null
+++ b/adb/fastdeploy/AndroidManifest.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2019 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.android.fastdeploytests">
+
+    <application android:testOnly="true"
+                 android:debuggable="true">
+        <uses-library android:name="android.test.runner" />
+    </application>
+
+    <instrumentation
+        android:name="androidx.test.runner.AndroidJUnitRunner"
+        android:targetPackage="com.android.fastdeploytests"
+        android:label="FastDeploy Tests" />
+</manifest>
\ No newline at end of file
diff --git a/adb/fastdeploy/AndroidTest.xml b/adb/fastdeploy/AndroidTest.xml
new file mode 100644
index 0000000..24a72bc
--- /dev/null
+++ b/adb/fastdeploy/AndroidTest.xml
@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2019 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License
+  -->
+<configuration description="Runs Device Tests for FastDeploy.">
+    <option name="test-suite-tag" value="FastDeployTests"/>
+
+    <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
+        <option name="cleanup-apks" value="true"/>
+        <option name="install-arg" value="-t"/>
+        <option name="test-file-name" value="FastDeployTests.apk"/>
+    </target_preparer>
+
+    <target_preparer class="com.android.tradefed.targetprep.PushFilePreparer">
+        <option name="cleanup" value="false" />
+        <option name="push-file" key="sample.apk" value="/data/local/tmp/FastDeployTests/sample.apk" />
+        <option name="push-file" key="sample.cd" value="/data/local/tmp/FastDeployTests/sample.cd" />
+    </target_preparer>
+
+    <test class="com.android.tradefed.testtype.AndroidJUnitTest">
+        <option name="package" value="com.android.fastdeploytests"/>
+        <option name="runner" value="androidx.test.runner.AndroidJUnitRunner"/>
+    </test>
+
+    <test class="com.android.compatibility.common.tradefed.testtype.JarHostTest" >
+        <option name="jar" value="FastDeployHostTests.jar" />
+    </test>
+</configuration>
diff --git a/adb/fastdeploy/deployagent/src/com/android/fastdeploy/ApkArchive.java b/adb/fastdeploy/deployagent/src/com/android/fastdeploy/ApkArchive.java
new file mode 100644
index 0000000..31e0502
--- /dev/null
+++ b/adb/fastdeploy/deployagent/src/com/android/fastdeploy/ApkArchive.java
@@ -0,0 +1,193 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.fastdeploy;
+
+import android.util.Log;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.channels.FileChannel;
+
+/**
+ * Extremely light-weight APK parser class.
+ * Aware of Central Directory, Local File Headers and Signature.
+ * No Zip64 support yet.
+ */
+public final class ApkArchive {
+    private static final String TAG = "ApkArchive";
+
+    // Central Directory constants.
+    private static final int EOCD_SIGNATURE = 0x06054b50;
+    private static final int EOCD_MIN_SIZE = 22;
+    private static final long EOCD_MAX_SIZE = 65_535L + EOCD_MIN_SIZE;
+
+    private static final int CD_ENTRY_HEADER_SIZE_BYTES = 22;
+    private static final int CD_LOCAL_FILE_HEADER_SIZE_OFFSET = 12;
+
+    // Signature constants.
+    private static final int EOSIGNATURE_SIZE = 24;
+
+    public final static class Dump {
+        final byte[] cd;
+        final byte[] signature;
+
+        Dump(byte[] cd, byte[] signature) {
+            this.cd = cd;
+            this.signature = signature;
+        }
+    }
+
+    final static class Location {
+        final long offset;
+        final long size;
+
+        public Location(long offset, long size) {
+            this.offset = offset;
+            this.size = size;
+        }
+    }
+
+    private final RandomAccessFile mFile;
+    private final FileChannel mChannel;
+
+    public ApkArchive(File apk) throws IOException {
+        mFile = new RandomAccessFile(apk, "r");
+        mChannel = mFile.getChannel();
+    }
+
+    /**
+     * Extract the APK metadata: content of Central Directory and Signature.
+     *
+     * @return raw content from APK representing CD and Signature data.
+     */
+    public Dump extractMetadata() throws IOException {
+        Location cdLoc = getCDLocation();
+        byte[] cd = readMetadata(cdLoc);
+
+        byte[] signature = null;
+        Location sigLoc = getSignatureLocation(cdLoc.offset);
+        if (sigLoc != null) {
+            signature = readMetadata(sigLoc);
+            long size = ByteBuffer.wrap(signature).order(ByteOrder.LITTLE_ENDIAN).getLong();
+            if (sigLoc.size != size) {
+                Log.e(TAG, "Mismatching signature sizes: " + sigLoc.size + " != " + size);
+                signature = null;
+            }
+        }
+
+        return new Dump(cd, signature);
+    }
+
+    private long findEndOfCDRecord() throws IOException {
+        final long fileSize = mChannel.size();
+        int sizeToRead = Math.toIntExact(Math.min(fileSize, EOCD_MAX_SIZE));
+        final long readOffset = fileSize - sizeToRead;
+        ByteBuffer buffer = mChannel.map(FileChannel.MapMode.READ_ONLY, readOffset,
+                sizeToRead).order(ByteOrder.LITTLE_ENDIAN);
+
+        buffer.position(sizeToRead - EOCD_MIN_SIZE);
+        while (true) {
+            int signature = buffer.getInt(); // Read 4 bytes.
+            if (signature == EOCD_SIGNATURE) {
+                return readOffset + buffer.position() - 4;
+            }
+            if (buffer.position() == 4) {
+                break;
+            }
+            buffer.position(buffer.position() - Integer.BYTES - 1); // Backtrack 5 bytes.
+        }
+
+        return -1L;
+    }
+
+    private Location findCDRecord(ByteBuffer buf) {
+        if (buf.order() != ByteOrder.LITTLE_ENDIAN) {
+            throw new IllegalArgumentException("ByteBuffer byte order must be little endian");
+        }
+        if (buf.remaining() < CD_ENTRY_HEADER_SIZE_BYTES) {
+            throw new IllegalArgumentException(
+                    "Input too short. Need at least " + CD_ENTRY_HEADER_SIZE_BYTES
+                            + " bytes, available: " + buf.remaining() + "bytes.");
+        }
+
+        int originalPosition = buf.position();
+        int recordSignature = buf.getInt();
+        if (recordSignature != EOCD_SIGNATURE) {
+            throw new IllegalArgumentException(
+                    "Not a Central Directory record. Signature: 0x"
+                            + Long.toHexString(recordSignature & 0xffffffffL));
+        }
+
+        buf.position(originalPosition + CD_LOCAL_FILE_HEADER_SIZE_OFFSET);
+        long size = buf.getInt() & 0xffffffffL;
+        long offset = buf.getInt() & 0xffffffffL;
+        return new Location(offset, size);
+    }
+
+    // Retrieve the location of the Central Directory Record.
+    Location getCDLocation() throws IOException {
+        long eocdRecord = findEndOfCDRecord();
+        if (eocdRecord < 0) {
+            throw new IllegalArgumentException("Unable to find End of Central Directory record.");
+        }
+
+        Location location = findCDRecord(mChannel.map(FileChannel.MapMode.READ_ONLY, eocdRecord,
+                CD_ENTRY_HEADER_SIZE_BYTES).order(ByteOrder.LITTLE_ENDIAN));
+        if (location == null) {
+            throw new IllegalArgumentException("Unable to find Central Directory File Header.");
+        }
+
+        return location;
+    }
+
+    // Retrieve the location of the signature block starting from Central
+    // Directory Record or null if signature is not found.
+    Location getSignatureLocation(long cdRecordOffset) throws IOException {
+        long signatureOffset = cdRecordOffset - EOSIGNATURE_SIZE;
+        if (signatureOffset < 0) {
+            Log.e(TAG, "Unable to find Signature.");
+            return null;
+        }
+
+        ByteBuffer signature = mChannel.map(FileChannel.MapMode.READ_ONLY, signatureOffset,
+                EOSIGNATURE_SIZE).order(ByteOrder.LITTLE_ENDIAN);
+
+        long size = signature.getLong();
+
+        byte[] sign = new byte[16];
+        signature.get(sign);
+        String signAsString = new String(sign);
+        if (!"APK Sig Block 42".equals(signAsString)) {
+            Log.e(TAG, "Signature magic does not match: " + signAsString);
+            return null;
+        }
+
+        long offset = cdRecordOffset - size - 8;
+
+        return new Location(offset, size);
+    }
+
+    private byte[] readMetadata(Location loc) throws IOException {
+        byte[] payload = new byte[(int) loc.size];
+        ByteBuffer buffer = mChannel.map(FileChannel.MapMode.READ_ONLY, loc.offset, loc.size);
+        buffer.get(payload);
+        return payload;
+    }
+}
diff --git a/adb/fastdeploy/deployagent/src/com/android/fastdeploy/DeployAgent.java b/adb/fastdeploy/deployagent/src/com/android/fastdeploy/DeployAgent.java
index a8103c4..3812307 100644
--- a/adb/fastdeploy/deployagent/src/com/android/fastdeploy/DeployAgent.java
+++ b/adb/fastdeploy/deployagent/src/com/android/fastdeploy/DeployAgent.java
@@ -24,18 +24,22 @@
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
-import java.util.concurrent.SynchronousQueue;
-import java.util.concurrent.TimeUnit;
-import java.io.OutputStream;
 import java.io.RandomAccessFile;
-import java.util.Set;
+import java.nio.channels.Channels;
+import java.nio.channels.FileChannel;
+import java.nio.channels.WritableByteChannel;
 
+import com.android.fastdeploy.PatchFormatException;
+import com.android.fastdeploy.ApkArchive;
+import com.android.fastdeploy.APKDump;
 import com.android.fastdeploy.APKMetaData;
 import com.android.fastdeploy.PatchUtils;
 
+import com.google.protobuf.ByteString;
+
 public final class DeployAgent {
     private static final int BUFFER_SIZE = 128 * 1024;
-    private static final int AGENT_VERSION = 0x00000002;
+    private static final int AGENT_VERSION = 0x00000003;
 
     public static void main(String[] args) {
         int exitCode = 0;
@@ -45,68 +49,70 @@
             }
 
             String commandString = args[0];
+            switch (commandString) {
+                case "dump": {
+                    if (args.length != 3) {
+                        showUsage(1);
+                    }
 
-            if (commandString.equals("extract")) {
-                if (args.length != 2) {
-                    showUsage(1);
-                }
-
-                String packageName = args[1];
-                extractMetaData(packageName);
-            } else if (commandString.equals("find")) {
-                if (args.length != 2) {
-                    showUsage(1);
-                }
-
-                String packageName = args[1];
-                if (getFilenameFromPackageName(packageName) == null) {
-                    exitCode = 3;
-                }
-            } else if (commandString.equals("apply")) {
-                if (args.length < 4) {
-                    showUsage(1);
-                }
-
-                String packageName = args[1];
-                String patchPath = args[2];
-                String outputParam = args[3];
-
-                InputStream deltaInputStream = null;
-                if (patchPath.compareTo("-") == 0) {
-                    deltaInputStream = System.in;
-                } else {
-                    deltaInputStream = new FileInputStream(patchPath);
-                }
-
-                if (outputParam.equals("-o")) {
-                    OutputStream outputStream = null;
-                    if (args.length > 4) {
-                        String outputPath = args[4];
-                        if (!outputPath.equals("-")) {
-                            outputStream = new FileOutputStream(outputPath);
+                    String requiredVersion = args[1];
+                    if (AGENT_VERSION == Integer.parseInt(requiredVersion)) {
+                        String packageName = args[2];
+                        String packagePath = getFilenameFromPackageName(packageName);
+                        if (packagePath != null) {
+                            dumpApk(packageName, packagePath);
+                        } else {
+                            exitCode = 3;
                         }
+                    } else {
+                        System.out.printf("0x%08X\n", AGENT_VERSION);
+                        exitCode = 4;
                     }
-                    if (outputStream == null) {
-                        outputStream = System.out;
-                    }
-                    File deviceFile = getFileFromPackageName(packageName);
-                    writePatchToStream(
-                            new RandomAccessFile(deviceFile, "r"), deltaInputStream, outputStream);
-                } else if (outputParam.equals("-pm")) {
-                    String[] sessionArgs = null;
-                    if (args.length > 4) {
-                        int numSessionArgs = args.length-4;
-                        sessionArgs = new String[numSessionArgs];
-                        for (int i=0 ; i<numSessionArgs ; i++) {
-                            sessionArgs[i] = args[i+4];
-                        }
-                    }
-                    exitCode = applyPatch(packageName, deltaInputStream, sessionArgs);
+                    break;
                 }
-            } else if (commandString.equals("version")) {
-                System.out.printf("0x%08X\n", AGENT_VERSION);
-            } else {
-                showUsage(1);
+                case "apply": {
+                    if (args.length < 3) {
+                        showUsage(1);
+                    }
+
+                    String patchPath = args[1];
+                    String outputParam = args[2];
+
+                    InputStream deltaInputStream = null;
+                    if (patchPath.compareTo("-") == 0) {
+                        deltaInputStream = System.in;
+                    } else {
+                        deltaInputStream = new FileInputStream(patchPath);
+                    }
+
+                    if (outputParam.equals("-o")) {
+                        OutputStream outputStream = null;
+                        if (args.length > 3) {
+                            String outputPath = args[3];
+                            if (!outputPath.equals("-")) {
+                                outputStream = new FileOutputStream(outputPath);
+                            }
+                        }
+                        if (outputStream == null) {
+                            outputStream = System.out;
+                        }
+                        writePatchToStream(deltaInputStream, outputStream);
+                    } else if (outputParam.equals("-pm")) {
+                        String[] sessionArgs = null;
+                        if (args.length > 3) {
+                            int numSessionArgs = args.length - 3;
+                            sessionArgs = new String[numSessionArgs];
+                            for (int i = 0; i < numSessionArgs; i++) {
+                                sessionArgs[i] = args[i + 3];
+                            }
+                        }
+                        exitCode = applyPatch(deltaInputStream, sessionArgs);
+                    }
+                    break;
+                }
+                default:
+                    showUsage(1);
+                    break;
             }
         } catch (Exception e) {
             System.err.println("Error: " + e);
@@ -118,16 +124,16 @@
 
     private static void showUsage(int exitCode) {
         System.err.println(
-            "usage: deployagent <command> [<args>]\n\n" +
-            "commands:\n" +
-            "version                             get the version\n" +
-            "find PKGNAME                        return zero if package found, else non-zero\n" +
-            "extract PKGNAME                     extract an installed package's metadata\n" +
-            "apply PKGNAME PATCHFILE [-o|-pm]    apply a patch from PATCHFILE (- for stdin) to an installed package\n" +
-            " -o <FILE> directs output to FILE, default or - for stdout\n" +
-            " -pm <ARGS> directs output to package manager, passes <ARGS> to 'pm install-create'\n"
-            );
-
+                "usage: deployagent <command> [<args>]\n\n" +
+                        "commands:\n" +
+                        "dump VERSION PKGNAME  dump info for an installed package given that " +
+                        "VERSION equals current agent's version\n" +
+                        "apply PATCHFILE [-o|-pm]    apply a patch from PATCHFILE " +
+                        "(- for stdin) to an installed package\n" +
+                        " -o <FILE> directs output to FILE, default or - for stdout\n" +
+                        " -pm <ARGS> directs output to package manager, passes <ARGS> to " +
+                        "'pm install-create'\n"
+        );
         System.exit(exitCode);
     }
 
@@ -162,32 +168,34 @@
                 }
                 int equalsIndex = line.lastIndexOf(packageSuffix);
                 String fileName =
-                    line.substring(packageIndex + packagePrefix.length(), equalsIndex);
+                        line.substring(packageIndex + packagePrefix.length(), equalsIndex);
                 return fileName;
             }
         }
         return null;
     }
 
-    private static File getFileFromPackageName(String packageName) throws IOException {
-        String filename = getFilenameFromPackageName(packageName);
-        if (filename == null) {
-            // Should not happen (function is only called when we know the package exists)
-            throw new IOException("package not found");
-        }
-        return new File(filename);
-    }
+    private static void dumpApk(String packageName, String packagePath) throws IOException {
+        File apk = new File(packagePath);
+        ApkArchive.Dump dump = new ApkArchive(apk).extractMetadata();
 
-    private static void extractMetaData(String packageName) throws IOException {
-        File apkFile = getFileFromPackageName(packageName);
-        APKMetaData apkMetaData = PatchUtils.getAPKMetaData(apkFile);
-        apkMetaData.writeTo(System.out);
+        APKDump.Builder apkDumpBuilder = APKDump.newBuilder();
+        apkDumpBuilder.setName(packageName);
+        if (dump.cd != null) {
+            apkDumpBuilder.setCd(ByteString.copyFrom(dump.cd));
+        }
+        if (dump.signature != null) {
+            apkDumpBuilder.setSignature(ByteString.copyFrom(dump.signature));
+        }
+        apkDumpBuilder.setAbsolutePath(apk.getAbsolutePath());
+
+        apkDumpBuilder.build().writeTo(System.out);
     }
 
     private static int createInstallSession(String[] args) throws IOException {
         StringBuilder commandBuilder = new StringBuilder();
         commandBuilder.append("pm install-create ");
-        for (int i=0 ; args != null && i<args.length ; i++) {
+        for (int i = 0; args != null && i < args.length; i++) {
             commandBuilder.append(args[i] + " ");
         }
 
@@ -199,7 +207,8 @@
         String successLineEnd = "]";
         while ((line = reader.readLine()) != null) {
             if (line.startsWith(successLineStart) && line.endsWith(successLineEnd)) {
-                return Integer.parseInt(line.substring(successLineStart.length(), line.lastIndexOf(successLineEnd)));
+                return Integer.parseInt(line.substring(successLineStart.length(),
+                        line.lastIndexOf(successLineEnd)));
             }
         }
 
@@ -213,16 +222,15 @@
         return p.exitValue();
     }
 
-    private static int applyPatch(String packageName, InputStream deltaStream, String[] sessionArgs)
+    private static int applyPatch(InputStream deltaStream, String[] sessionArgs)
             throws IOException, PatchFormatException {
-        File deviceFile = getFileFromPackageName(packageName);
         int sessionId = createInstallSession(sessionArgs);
         if (sessionId < 0) {
             System.err.println("PM Create Session Failed");
             return -1;
         }
 
-        int writeExitCode = writePatchedDataToSession(new RandomAccessFile(deviceFile, "r"), deltaStream, sessionId);
+        int writeExitCode = writePatchedDataToSession(deltaStream, sessionId);
         if (writeExitCode == 0) {
             return commitInstallSession(sessionId);
         } else {
@@ -230,84 +238,94 @@
         }
     }
 
-    private static long writePatchToStream(RandomAccessFile oldData, InputStream patchData,
-        OutputStream outputStream) throws IOException, PatchFormatException {
+    private static long writePatchToStream(InputStream patchData,
+            OutputStream outputStream) throws IOException, PatchFormatException {
         long newSize = readPatchHeader(patchData);
-        long bytesWritten = writePatchedDataToStream(oldData, newSize, patchData, outputStream);
+        long bytesWritten = writePatchedDataToStream(newSize, patchData, outputStream);
         outputStream.flush();
         if (bytesWritten != newSize) {
             throw new PatchFormatException(String.format(
-                "output size mismatch (expected %ld but wrote %ld)", newSize, bytesWritten));
+                    "output size mismatch (expected %ld but wrote %ld)", newSize, bytesWritten));
         }
         return bytesWritten;
     }
 
     private static long readPatchHeader(InputStream patchData)
-        throws IOException, PatchFormatException {
+            throws IOException, PatchFormatException {
         byte[] signatureBuffer = new byte[PatchUtils.SIGNATURE.length()];
         try {
-            PatchUtils.readFully(patchData, signatureBuffer, 0, signatureBuffer.length);
+            PatchUtils.readFully(patchData, signatureBuffer);
         } catch (IOException e) {
             throw new PatchFormatException("truncated signature");
         }
 
-        String signature = new String(signatureBuffer, 0, signatureBuffer.length, "US-ASCII");
+        String signature = new String(signatureBuffer);
         if (!PatchUtils.SIGNATURE.equals(signature)) {
             throw new PatchFormatException("bad signature");
         }
 
-        long newSize = PatchUtils.readBsdiffLong(patchData);
-        if (newSize < 0 || newSize > Integer.MAX_VALUE) {
-            throw new PatchFormatException("bad newSize");
+        long newSize = PatchUtils.readLELong(patchData);
+        if (newSize < 0) {
+            throw new PatchFormatException("bad newSize: " + newSize);
         }
 
         return newSize;
     }
 
     // Note that this function assumes patchData has been seek'ed to the start of the delta stream
-    // (i.e. the signature has already been read by readPatchHeader). For a stream that points to the
-    // start of a patch file call writePatchToStream
-    private static long writePatchedDataToStream(RandomAccessFile oldData, long newSize,
-        InputStream patchData, OutputStream outputStream) throws IOException {
+    // (i.e. the signature has already been read by readPatchHeader). For a stream that points to
+    // the start of a patch file call writePatchToStream
+    private static long writePatchedDataToStream(long newSize, InputStream patchData,
+            OutputStream outputStream) throws IOException {
+        String deviceFile = PatchUtils.readString(patchData);
+        RandomAccessFile oldDataFile = new RandomAccessFile(deviceFile, "r");
+        FileChannel oldData = oldDataFile.getChannel();
+
+        WritableByteChannel newData = Channels.newChannel(outputStream);
+
         long newDataBytesWritten = 0;
         byte[] buffer = new byte[BUFFER_SIZE];
 
         while (newDataBytesWritten < newSize) {
-            long copyLen = PatchUtils.readFormattedLong(patchData);
-            if (copyLen > 0) {
-                PatchUtils.pipe(patchData, outputStream, buffer, (int) copyLen);
+            long newDataLen = PatchUtils.readLELong(patchData);
+            if (newDataLen > 0) {
+                PatchUtils.pipe(patchData, outputStream, buffer, newDataLen);
             }
 
-            long oldDataOffset = PatchUtils.readFormattedLong(patchData);
-            long oldDataLen = PatchUtils.readFormattedLong(patchData);
-            oldData.seek(oldDataOffset);
-            if (oldDataLen > 0) {
-                PatchUtils.pipe(oldData, outputStream, buffer, (int) oldDataLen);
+            long oldDataOffset = PatchUtils.readLELong(patchData);
+            long oldDataLen = PatchUtils.readLELong(patchData);
+            if (oldDataLen >= 0) {
+                long offset = oldDataOffset;
+                long len = oldDataLen;
+                while (len > 0) {
+                    long chunkLen = Math.min(len, 1024*1024*1024);
+                    oldData.transferTo(offset, chunkLen, newData);
+                    offset += chunkLen;
+                    len -= chunkLen;
+                }
             }
-            newDataBytesWritten += copyLen + oldDataLen;
+            newDataBytesWritten += newDataLen + oldDataLen;
         }
 
         return newDataBytesWritten;
     }
 
-    private static int writePatchedDataToSession(RandomAccessFile oldData, InputStream patchData, int sessionId)
+    private static int writePatchedDataToSession(InputStream patchData, int sessionId)
             throws IOException, PatchFormatException {
         try {
             Process p;
             long newSize = readPatchHeader(patchData);
-            StringBuilder commandBuilder = new StringBuilder();
-            commandBuilder.append(String.format("pm install-write -S %d %d -- -", newSize, sessionId));
-
-            String command = commandBuilder.toString();
+            String command = String.format("pm install-write -S %d %d -- -", newSize, sessionId);
             p = Runtime.getRuntime().exec(command);
 
             OutputStream sessionOutputStream = p.getOutputStream();
-            long bytesWritten = writePatchedDataToStream(oldData, newSize, patchData, sessionOutputStream);
+            long bytesWritten = writePatchedDataToStream(newSize, patchData, sessionOutputStream);
             sessionOutputStream.flush();
             p.waitFor();
             if (bytesWritten != newSize) {
                 throw new PatchFormatException(
-                        String.format("output size mismatch (expected %d but wrote %)", newSize, bytesWritten));
+                        String.format("output size mismatch (expected %d but wrote %)", newSize,
+                                bytesWritten));
             }
             return p.exitValue();
         } catch (InterruptedException e) {
diff --git a/adb/fastdeploy/deploylib/src/com/android/fastdeploy/PatchFormatException.java b/adb/fastdeploy/deployagent/src/com/android/fastdeploy/PatchFormatException.java
similarity index 100%
rename from adb/fastdeploy/deploylib/src/com/android/fastdeploy/PatchFormatException.java
rename to adb/fastdeploy/deployagent/src/com/android/fastdeploy/PatchFormatException.java
diff --git a/adb/fastdeploy/deployagent/src/com/android/fastdeploy/PatchUtils.java b/adb/fastdeploy/deployagent/src/com/android/fastdeploy/PatchUtils.java
new file mode 100644
index 0000000..54be26f
--- /dev/null
+++ b/adb/fastdeploy/deployagent/src/com/android/fastdeploy/PatchUtils.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.fastdeploy;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+class PatchUtils {
+    public static final String SIGNATURE = "FASTDEPLOY";
+
+    /**
+     * Reads a 64-bit signed integer in Little Endian format from the specified {@link
+     * DataInputStream}.
+     *
+     * @param in the stream to read from.
+     */
+    static long readLELong(InputStream in) throws IOException {
+        byte[] buffer = new byte[Long.BYTES];
+        readFully(in, buffer);
+        ByteBuffer buf = ByteBuffer.wrap(buffer).order(ByteOrder.LITTLE_ENDIAN);
+        return buf.getLong();
+    }
+
+    static String readString(InputStream in) throws IOException {
+        int size = (int) readLELong(in);
+        byte[] buffer = new byte[size];
+        readFully(in, buffer);
+        return new String(buffer);
+    }
+
+    static void readFully(final InputStream in, final byte[] destination, final int startAt,
+            final int numBytes) throws IOException {
+        int numRead = 0;
+        while (numRead < numBytes) {
+            int readNow = in.read(destination, startAt + numRead, numBytes - numRead);
+            if (readNow == -1) {
+                throw new IOException("truncated input stream");
+            }
+            numRead += readNow;
+        }
+    }
+
+    static void readFully(final InputStream in, final byte[] destination) throws IOException {
+        readFully(in, destination, 0, destination.length);
+    }
+
+    static void pipe(final InputStream in, final OutputStream out, final byte[] buffer,
+            long copyLength) throws IOException {
+        while (copyLength > 0) {
+            int maxCopy = (int) Math.min(buffer.length, copyLength);
+            readFully(in, buffer, 0, maxCopy);
+            out.write(buffer, 0, maxCopy);
+            copyLength -= maxCopy;
+        }
+    }
+}
diff --git a/adb/fastdeploy/deployagent/test/com/android/fastdeploy/ApkArchiveTest.java b/adb/fastdeploy/deployagent/test/com/android/fastdeploy/ApkArchiveTest.java
new file mode 100644
index 0000000..7c2468f
--- /dev/null
+++ b/adb/fastdeploy/deployagent/test/com/android/fastdeploy/ApkArchiveTest.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.fastdeploy;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import com.android.fastdeploy.ApkArchive;
+
+import java.io.File;
+import java.io.IOException;
+
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class ApkArchiveTest {
+    private static final File SAMPLE_APK = new File("/data/local/tmp/FastDeployTests/sample.apk");
+    private static final File WRONG_APK = new File("/data/local/tmp/FastDeployTests/sample.cd");
+
+    @Test
+    public void testApkArchiveSizes() throws IOException {
+        ApkArchive archive = new ApkArchive(SAMPLE_APK);
+
+        ApkArchive.Location cdLoc = archive.getCDLocation();
+        assertNotEquals(cdLoc, null);
+        assertEquals(cdLoc.offset, 2044145);
+        assertEquals(cdLoc.size, 49390);
+
+        // Check that block can be retrieved
+        ApkArchive.Location sigLoc = archive.getSignatureLocation(cdLoc.offset);
+        assertNotEquals(sigLoc, null);
+        assertEquals(sigLoc.offset, 2040049);
+        assertEquals(sigLoc.size, 4088);
+    }
+
+    @Test
+    public void testApkArchiveDump() throws IOException {
+        ApkArchive archive = new ApkArchive(SAMPLE_APK);
+
+        ApkArchive.Dump dump = archive.extractMetadata();
+        assertNotEquals(dump, null);
+        assertNotEquals(dump.cd, null);
+        assertNotEquals(dump.signature, null);
+        assertEquals(dump.cd.length, 49390);
+        assertEquals(dump.signature.length, 4088);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testApkArchiveDumpWrongApk() throws IOException {
+        ApkArchive archive = new ApkArchive(WRONG_APK);
+
+        archive.extractMetadata();
+    }
+}
diff --git a/adb/fastdeploy/deployagent/test/com/android/fastdeploy/FastDeployTest.java b/adb/fastdeploy/deployagent/test/com/android/fastdeploy/FastDeployTest.java
new file mode 100644
index 0000000..4aa2f79
--- /dev/null
+++ b/adb/fastdeploy/deployagent/test/com/android/fastdeploy/FastDeployTest.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.fastdeploy;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import com.android.compatibility.common.tradefed.build.CompatibilityBuildHelper;
+import com.android.ddmlib.Log.LogLevel;
+import com.android.tradefed.device.DeviceNotAvailableException;
+import com.android.tradefed.log.LogUtil.CLog;
+import com.android.tradefed.testtype.DeviceJUnit4ClassRunner;
+import com.android.tradefed.testtype.junit4.BaseHostJUnit4Test;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.io.IOException;
+import java.util.Arrays;
+
+@RunWith(DeviceJUnit4ClassRunner.class)
+public class FastDeployTest extends BaseHostJUnit4Test {
+
+    private static final String TEST_APP_PACKAGE = "com.example.helloworld";
+    private static final String TEST_APK5_NAME = "helloworld5.apk";
+    private static final String TEST_APK7_NAME = "helloworld7.apk";
+
+    private String mTestApk5Path;
+    private String mTestApk7Path;
+
+    @Before
+    public void setUp() throws Exception {
+        CompatibilityBuildHelper buildHelper = new CompatibilityBuildHelper(getBuild());
+        getDevice().uninstallPackage(TEST_APP_PACKAGE);
+        mTestApk5Path = buildHelper.getTestFile(TEST_APK5_NAME).getAbsolutePath();
+        mTestApk7Path = buildHelper.getTestFile(TEST_APK7_NAME).getAbsolutePath();
+    }
+
+    @Test
+    public void testAppInstalls() throws Exception {
+        fastInstallPackage(mTestApk5Path);
+        assertTrue(isAppInstalled(TEST_APP_PACKAGE));
+        getDevice().uninstallPackage(TEST_APP_PACKAGE);
+        assertFalse(isAppInstalled(TEST_APP_PACKAGE));
+    }
+
+    @Test
+    public void testAppPatch() throws Exception {
+        fastInstallPackage(mTestApk5Path);
+        assertTrue(isAppInstalled(TEST_APP_PACKAGE));
+        fastInstallPackage(mTestApk7Path);
+        assertTrue(isAppInstalled(TEST_APP_PACKAGE));
+        getDevice().uninstallPackage(TEST_APP_PACKAGE);
+        assertFalse(isAppInstalled(TEST_APP_PACKAGE));
+    }
+
+    private boolean isAppInstalled(String packageName) throws DeviceNotAvailableException {
+        final String result = getDevice().executeShellCommand("pm list packages");
+        CLog.logAndDisplay(LogLevel.INFO, result);
+        final int prefixLength = "package:".length();
+        return Arrays.stream(result.split("\\r?\\n"))
+                .anyMatch(line -> line.substring(prefixLength).equals(packageName));
+    }
+
+    // Mostly copied from PkgInstallSignatureVerificationTest.java.
+    private void fastInstallPackage(String apkPath)
+            throws IOException, DeviceNotAvailableException {
+        String result = getDevice().executeAdbCommand("install", "-t", "--fastdeploy", "--force-agent",
+                apkPath);
+        CLog.logAndDisplay(LogLevel.INFO, result);
+    }
+}
+
+
diff --git a/adb/fastdeploy/deploylib/src/com/android/fastdeploy/PatchUtils.java b/adb/fastdeploy/deploylib/src/com/android/fastdeploy/PatchUtils.java
deleted file mode 100644
index c60f9a6..0000000
--- a/adb/fastdeploy/deploylib/src/com/android/fastdeploy/PatchUtils.java
+++ /dev/null
@@ -1,186 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.fastdeploy;
-
-import java.io.File;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.io.RandomAccessFile;
-import java.util.Arrays;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.Comparator;
-
-import com.android.tools.build.apkzlib.zip.ZFile;
-import com.android.tools.build.apkzlib.zip.ZFileOptions;
-import com.android.tools.build.apkzlib.zip.StoredEntry;
-import com.android.tools.build.apkzlib.zip.StoredEntryType;
-import com.android.tools.build.apkzlib.zip.CentralDirectoryHeaderCompressInfo;
-import com.android.tools.build.apkzlib.zip.CentralDirectoryHeader;
-
-import com.android.fastdeploy.APKMetaData;
-import com.android.fastdeploy.APKEntry;
-
-class PatchUtils {
-    private static final long NEGATIVE_MASK = 1L << 63;
-    private static final long NEGATIVE_LONG_SIGN_MASK = 1L << 63;
-    public static final String SIGNATURE = "FASTDEPLOY";
-
-    private static long getOffsetFromEntry(StoredEntry entry) {
-        return entry.getCentralDirectoryHeader().getOffset() + entry.getLocalHeaderSize();
-    }
-
-    public static APKMetaData getAPKMetaData(File apkFile) throws IOException {
-        APKMetaData.Builder apkEntriesBuilder = APKMetaData.newBuilder();
-        ZFileOptions options = new ZFileOptions();
-        ZFile zFile = new ZFile(apkFile, options);
-
-        ArrayList<StoredEntry> metaDataEntries = new ArrayList<StoredEntry>();
-
-        for (StoredEntry entry : zFile.entries()) {
-            if (entry.getType() != StoredEntryType.FILE) {
-                continue;
-            }
-            metaDataEntries.add(entry);
-        }
-
-        Collections.sort(metaDataEntries, new Comparator<StoredEntry>() {
-            private long getOffsetFromEntry(StoredEntry entry) {
-                return PatchUtils.getOffsetFromEntry(entry);
-            }
-
-            @Override
-            public int compare(StoredEntry lhs, StoredEntry rhs) {
-                // -1 - less than, 1 - greater than, 0 - equal, all inversed for descending
-                return Long.compare(getOffsetFromEntry(lhs), getOffsetFromEntry(rhs));
-            }
-        });
-
-        for (StoredEntry entry : metaDataEntries) {
-            CentralDirectoryHeader cdh = entry.getCentralDirectoryHeader();
-            CentralDirectoryHeaderCompressInfo cdhci = cdh.getCompressionInfoWithWait();
-
-            APKEntry.Builder entryBuilder = APKEntry.newBuilder();
-            entryBuilder.setCrc32(cdh.getCrc32());
-            entryBuilder.setFileName(cdh.getName());
-            entryBuilder.setCompressedSize(cdhci.getCompressedSize());
-            entryBuilder.setUncompressedSize(cdh.getUncompressedSize());
-            entryBuilder.setDataOffset(getOffsetFromEntry(entry));
-
-            apkEntriesBuilder.addEntries(entryBuilder);
-            apkEntriesBuilder.build();
-        }
-        return apkEntriesBuilder.build();
-    }
-
-    /**
-     * Writes a 64-bit signed integer to the specified {@link OutputStream}. The least significant
-     * byte is written first and the most significant byte is written last.
-     * @param value the value to write
-     * @param outputStream the stream to write to
-     */
-    static void writeFormattedLong(final long value, OutputStream outputStream) throws IOException {
-        long y = value;
-        if (y < 0) {
-            y = (-y) | NEGATIVE_MASK;
-        }
-
-        for (int i = 0; i < 8; ++i) {
-            outputStream.write((byte) (y & 0xff));
-            y >>>= 8;
-        }
-    }
-
-    /**
-     * Reads a 64-bit signed integer written by {@link #writeFormattedLong(long, OutputStream)} from
-     * the specified {@link InputStream}.
-     * @param inputStream the stream to read from
-     */
-    static long readFormattedLong(InputStream inputStream) throws IOException {
-        long result = 0;
-        for (int bitshift = 0; bitshift < 64; bitshift += 8) {
-            result |= ((long) inputStream.read()) << bitshift;
-        }
-
-        if ((result - NEGATIVE_MASK) > 0) {
-            result = (result & ~NEGATIVE_MASK) * -1;
-        }
-        return result;
-    }
-
-    static final long readBsdiffLong(InputStream in) throws PatchFormatException, IOException {
-        long result = 0;
-        for (int bitshift = 0; bitshift < 64; bitshift += 8) {
-            result |= ((long) in.read()) << bitshift;
-        }
-
-        if (result == NEGATIVE_LONG_SIGN_MASK) {
-            // "Negative zero", which is valid in signed-magnitude format.
-            // NB: No sane patch generator should ever produce such a value.
-            throw new PatchFormatException("read negative zero");
-        }
-
-        if ((result & NEGATIVE_LONG_SIGN_MASK) != 0) {
-            result = -(result & ~NEGATIVE_LONG_SIGN_MASK);
-        }
-
-        return result;
-    }
-
-    static void readFully(final InputStream in, final byte[] destination, final int startAt,
-        final int numBytes) throws IOException {
-        int numRead = 0;
-        while (numRead < numBytes) {
-            int readNow = in.read(destination, startAt + numRead, numBytes - numRead);
-            if (readNow == -1) {
-                throw new IOException("truncated input stream");
-            }
-            numRead += readNow;
-        }
-    }
-
-    static void pipe(final InputStream in, final OutputStream out, final byte[] buffer,
-        long copyLength) throws IOException {
-        while (copyLength > 0) {
-            int maxCopy = Math.min(buffer.length, (int) copyLength);
-            readFully(in, buffer, 0, maxCopy);
-            out.write(buffer, 0, maxCopy);
-            copyLength -= maxCopy;
-        }
-    }
-
-    static void pipe(final RandomAccessFile in, final OutputStream out, final byte[] buffer,
-        long copyLength) throws IOException {
-        while (copyLength > 0) {
-            int maxCopy = Math.min(buffer.length, (int) copyLength);
-            in.readFully(buffer, 0, maxCopy);
-            out.write(buffer, 0, maxCopy);
-            copyLength -= maxCopy;
-        }
-    }
-
-    static void fill(byte value, final OutputStream out, final byte[] buffer, long fillLength)
-        throws IOException {
-        while (fillLength > 0) {
-            int maxCopy = Math.min(buffer.length, (int) fillLength);
-            Arrays.fill(buffer, 0, maxCopy, value);
-            out.write(buffer, 0, maxCopy);
-            fillLength -= maxCopy;
-        }
-    }
-}
diff --git a/adb/fastdeploy/deploypatchgenerator/apk_archive.cpp b/adb/fastdeploy/deploypatchgenerator/apk_archive.cpp
new file mode 100644
index 0000000..3dc5e50
--- /dev/null
+++ b/adb/fastdeploy/deploypatchgenerator/apk_archive.cpp
@@ -0,0 +1,415 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define TRACE_TAG ADB
+
+#include "apk_archive.h"
+
+#include "adb_trace.h"
+#include "sysdeps.h"
+
+#include <android-base/endian.h>
+#include <android-base/mapped_file.h>
+
+#include <openssl/md5.h>
+
+constexpr uint16_t kCompressStored = 0;
+
+// mask value that signifies that the entry has a DD
+static const uint32_t kGPBDDFlagMask = 0x0008;
+
+namespace {
+struct FileRegion {
+    FileRegion(borrowed_fd fd, off64_t offset, size_t length)
+        : mapped_(android::base::MappedFile::FromOsHandle(adb_get_os_handle(fd), offset, length,
+                                                          PROT_READ)) {
+        if (mapped_.data() != nullptr) {
+            return;
+        }
+
+        // Mapped file failed, falling back to pread.
+        buffer_.resize(length);
+        if (auto err = adb_pread(fd.get(), buffer_.data(), length, offset); size_t(err) != length) {
+            fprintf(stderr, "Unable to read %lld bytes at offset %" PRId64 " \n",
+                    static_cast<long long>(length), offset);
+            buffer_.clear();
+            return;
+        }
+    }
+
+    const char* data() const { return mapped_.data() ? mapped_.data() : buffer_.data(); }
+    size_t size() const { return mapped_.data() ? mapped_.size() : buffer_.size(); }
+
+  private:
+    FileRegion() = default;
+    DISALLOW_COPY_AND_ASSIGN(FileRegion);
+
+    android::base::MappedFile mapped_;
+    std::string buffer_;
+};
+}  // namespace
+
+using com::android::fastdeploy::APKDump;
+
+ApkArchive::ApkArchive(const std::string& path) : path_(path), size_(0) {
+    fd_.reset(adb_open(path_.c_str(), O_RDONLY));
+    if (fd_ == -1) {
+        fprintf(stderr, "Unable to open file '%s'\n", path_.c_str());
+        return;
+    }
+
+    struct stat st;
+    if (stat(path_.c_str(), &st) == -1) {
+        fprintf(stderr, "Unable to stat file '%s'\n", path_.c_str());
+        return;
+    }
+    size_ = st.st_size;
+}
+
+ApkArchive::~ApkArchive() {}
+
+APKDump ApkArchive::ExtractMetadata() {
+    D("ExtractMetadata");
+    if (!ready()) {
+        return {};
+    }
+
+    Location cdLoc = GetCDLocation();
+    if (!cdLoc.valid) {
+        return {};
+    }
+
+    APKDump dump;
+    dump.set_absolute_path(path_);
+    dump.set_cd(ReadMetadata(cdLoc));
+
+    Location sigLoc = GetSignatureLocation(cdLoc.offset);
+    if (sigLoc.valid) {
+        dump.set_signature(ReadMetadata(sigLoc));
+    }
+    return dump;
+}
+
+off_t ApkArchive::FindEndOfCDRecord() const {
+    constexpr int endOfCDSignature = 0x06054b50;
+    constexpr off_t endOfCDMinSize = 22;
+    constexpr off_t endOfCDMaxSize = 65535 + endOfCDMinSize;
+
+    auto sizeToRead = std::min(size_, endOfCDMaxSize);
+    auto readOffset = size_ - sizeToRead;
+    FileRegion mapped(fd_, readOffset, sizeToRead);
+
+    // Start scanning from the end
+    auto* start = mapped.data();
+    auto* cursor = start + mapped.size() - sizeof(endOfCDSignature);
+
+    // Search for End of Central Directory record signature.
+    while (cursor >= start) {
+        if (*(int32_t*)cursor == endOfCDSignature) {
+            return readOffset + (cursor - start);
+        }
+        cursor--;
+    }
+    return -1;
+}
+
+ApkArchive::Location ApkArchive::FindCDRecord(const char* cursor) {
+    struct ecdr_t {
+        int32_t signature;
+        uint16_t diskNumber;
+        uint16_t numDisk;
+        uint16_t diskEntries;
+        uint16_t numEntries;
+        uint32_t crSize;
+        uint32_t offsetToCdHeader;
+        uint16_t commentSize;
+        uint8_t comment[0];
+    } __attribute__((packed));
+    ecdr_t* header = (ecdr_t*)cursor;
+
+    Location location;
+    location.offset = header->offsetToCdHeader;
+    location.size = header->crSize;
+    location.valid = true;
+    return location;
+}
+
+ApkArchive::Location ApkArchive::GetCDLocation() {
+    constexpr off_t cdEntryHeaderSizeBytes = 22;
+    Location location;
+
+    // Find End of Central Directory Record
+    off_t eocdRecord = FindEndOfCDRecord();
+    if (eocdRecord < 0) {
+        fprintf(stderr, "Unable to find End of Central Directory record in file '%s'\n",
+                path_.c_str());
+        return location;
+    }
+
+    // Find Central Directory Record
+    FileRegion mapped(fd_, eocdRecord, cdEntryHeaderSizeBytes);
+    location = FindCDRecord(mapped.data());
+    if (!location.valid) {
+        fprintf(stderr, "Unable to find Central Directory File Header in file '%s'\n",
+                path_.c_str());
+        return location;
+    }
+
+    return location;
+}
+
+ApkArchive::Location ApkArchive::GetSignatureLocation(off_t cdRecordOffset) {
+    Location location;
+
+    // Signature constants.
+    constexpr off_t endOfSignatureSize = 24;
+    off_t signatureOffset = cdRecordOffset - endOfSignatureSize;
+    if (signatureOffset < 0) {
+        fprintf(stderr, "Unable to find signature in file '%s'\n", path_.c_str());
+        return location;
+    }
+
+    FileRegion mapped(fd_, signatureOffset, endOfSignatureSize);
+
+    uint64_t signatureSize = *(uint64_t*)mapped.data();
+    auto* signature = mapped.data() + sizeof(signatureSize);
+    // Check if there is a v2/v3 Signature block here.
+    if (memcmp(signature, "APK Sig Block 42", 16)) {
+        return location;
+    }
+
+    // This is likely a signature block.
+    location.size = signatureSize;
+    location.offset = cdRecordOffset - location.size - 8;
+    location.valid = true;
+
+    return location;
+}
+
+std::string ApkArchive::ReadMetadata(Location loc) const {
+    FileRegion mapped(fd_, loc.offset, loc.size);
+    return {mapped.data(), mapped.size()};
+}
+
+size_t ApkArchive::ParseCentralDirectoryRecord(const char* input, size_t size, std::string* md5Hash,
+                                               int64_t* localFileHeaderOffset, int64_t* dataSize) {
+    // A structure representing the fixed length fields for a single
+    // record in the central directory of the archive. In addition to
+    // the fixed length fields listed here, each central directory
+    // record contains a variable length "file_name" and "extra_field"
+    // whose lengths are given by |file_name_length| and |extra_field_length|
+    // respectively.
+    static constexpr int kCDFileHeaderMagic = 0x02014b50;
+    struct CentralDirectoryRecord {
+        // The start of record signature. Must be |kSignature|.
+        uint32_t record_signature;
+        // Source tool version. Top byte gives source OS.
+        uint16_t version_made_by;
+        // Tool version. Ignored by this implementation.
+        uint16_t version_needed;
+        // The "general purpose bit flags" for this entry. The only
+        // flag value that we currently check for is the "data descriptor"
+        // flag.
+        uint16_t gpb_flags;
+        // The compression method for this entry, one of |kCompressStored|
+        // and |kCompressDeflated|.
+        uint16_t compression_method;
+        // The file modification time and date for this entry.
+        uint16_t last_mod_time;
+        uint16_t last_mod_date;
+        // The CRC-32 checksum for this entry.
+        uint32_t crc32;
+        // The compressed size (in bytes) of this entry.
+        uint32_t compressed_size;
+        // The uncompressed size (in bytes) of this entry.
+        uint32_t uncompressed_size;
+        // The length of the entry file name in bytes. The file name
+        // will appear immediately after this record.
+        uint16_t file_name_length;
+        // The length of the extra field info (in bytes). This data
+        // will appear immediately after the entry file name.
+        uint16_t extra_field_length;
+        // The length of the entry comment (in bytes). This data will
+        // appear immediately after the extra field.
+        uint16_t comment_length;
+        // The start disk for this entry. Ignored by this implementation).
+        uint16_t file_start_disk;
+        // File attributes. Ignored by this implementation.
+        uint16_t internal_file_attributes;
+        // File attributes. For archives created on Unix, the top bits are the
+        // mode.
+        uint32_t external_file_attributes;
+        // The offset to the local file header for this entry, from the
+        // beginning of this archive.
+        uint32_t local_file_header_offset;
+
+      private:
+        CentralDirectoryRecord() = default;
+        DISALLOW_COPY_AND_ASSIGN(CentralDirectoryRecord);
+    } __attribute__((packed));
+
+    const CentralDirectoryRecord* cdr;
+    if (size < sizeof(*cdr)) {
+        return 0;
+    }
+
+    auto begin = input;
+    cdr = reinterpret_cast<const CentralDirectoryRecord*>(begin);
+    if (cdr->record_signature != kCDFileHeaderMagic) {
+        fprintf(stderr, "Invalid Central Directory Record signature\n");
+        return 0;
+    }
+    auto end = begin + sizeof(*cdr) + cdr->file_name_length + cdr->extra_field_length +
+               cdr->comment_length;
+
+    uint8_t md5Digest[MD5_DIGEST_LENGTH];
+    MD5((const unsigned char*)begin, end - begin, md5Digest);
+    md5Hash->assign((const char*)md5Digest, sizeof(md5Digest));
+
+    *localFileHeaderOffset = cdr->local_file_header_offset;
+    *dataSize = (cdr->compression_method == kCompressStored) ? cdr->uncompressed_size
+                                                             : cdr->compressed_size;
+
+    return end - begin;
+}
+
+size_t ApkArchive::CalculateLocalFileEntrySize(int64_t localFileHeaderOffset,
+                                               int64_t dataSize) const {
+    // The local file header for a given entry. This duplicates information
+    // present in the central directory of the archive. It is an error for
+    // the information here to be different from the central directory
+    // information for a given entry.
+    static constexpr int kLocalFileHeaderMagic = 0x04034b50;
+    struct LocalFileHeader {
+        // The local file header signature, must be |kSignature|.
+        uint32_t lfh_signature;
+        // Tool version. Ignored by this implementation.
+        uint16_t version_needed;
+        // The "general purpose bit flags" for this entry. The only
+        // flag value that we currently check for is the "data descriptor"
+        // flag.
+        uint16_t gpb_flags;
+        // The compression method for this entry, one of |kCompressStored|
+        // and |kCompressDeflated|.
+        uint16_t compression_method;
+        // The file modification time and date for this entry.
+        uint16_t last_mod_time;
+        uint16_t last_mod_date;
+        // The CRC-32 checksum for this entry.
+        uint32_t crc32;
+        // The compressed size (in bytes) of this entry.
+        uint32_t compressed_size;
+        // The uncompressed size (in bytes) of this entry.
+        uint32_t uncompressed_size;
+        // The length of the entry file name in bytes. The file name
+        // will appear immediately after this record.
+        uint16_t file_name_length;
+        // The length of the extra field info (in bytes). This data
+        // will appear immediately after the entry file name.
+        uint16_t extra_field_length;
+
+      private:
+        LocalFileHeader() = default;
+        DISALLOW_COPY_AND_ASSIGN(LocalFileHeader);
+    } __attribute__((packed));
+    static constexpr int kLocalFileHeaderSize = sizeof(LocalFileHeader);
+    CHECK(ready()) << path_;
+
+    const LocalFileHeader* lfh;
+    if (localFileHeaderOffset + kLocalFileHeaderSize > size_) {
+        fprintf(stderr,
+                "Invalid Local File Header offset in file '%s' at offset %lld, file size %lld\n",
+                path_.c_str(), static_cast<long long>(localFileHeaderOffset),
+                static_cast<long long>(size_));
+        return 0;
+    }
+
+    FileRegion lfhMapped(fd_, localFileHeaderOffset, sizeof(LocalFileHeader));
+    lfh = reinterpret_cast<const LocalFileHeader*>(lfhMapped.data());
+    if (lfh->lfh_signature != kLocalFileHeaderMagic) {
+        fprintf(stderr, "Invalid Local File Header signature in file '%s' at offset %lld\n",
+                path_.c_str(), static_cast<long long>(localFileHeaderOffset));
+        return 0;
+    }
+
+    // The *optional* data descriptor start signature.
+    static constexpr int kOptionalDataDescriptorMagic = 0x08074b50;
+    struct DataDescriptor {
+        // CRC-32 checksum of the entry.
+        uint32_t crc32;
+        // Compressed size of the entry.
+        uint32_t compressed_size;
+        // Uncompressed size of the entry.
+        uint32_t uncompressed_size;
+
+      private:
+        DataDescriptor() = default;
+        DISALLOW_COPY_AND_ASSIGN(DataDescriptor);
+    } __attribute__((packed));
+    static constexpr int kDataDescriptorSize = sizeof(DataDescriptor);
+
+    off_t ddOffset = localFileHeaderOffset + kLocalFileHeaderSize + lfh->file_name_length +
+                     lfh->extra_field_length + dataSize;
+    int64_t ddSize = 0;
+
+    int64_t localDataSize;
+    if (lfh->gpb_flags & kGPBDDFlagMask) {
+        // There is trailing data descriptor.
+        const DataDescriptor* dd;
+
+        if (ddOffset + int(sizeof(uint32_t)) > size_) {
+            fprintf(stderr,
+                    "Error reading trailing data descriptor signature in file '%s' at offset %lld, "
+                    "file size %lld\n",
+                    path_.c_str(), static_cast<long long>(ddOffset), static_cast<long long>(size_));
+            return 0;
+        }
+
+        FileRegion ddMapped(fd_, ddOffset, sizeof(uint32_t) + sizeof(DataDescriptor));
+
+        off_t localDDOffset = 0;
+        if (kOptionalDataDescriptorMagic == *(uint32_t*)ddMapped.data()) {
+            ddOffset += sizeof(uint32_t);
+            localDDOffset += sizeof(uint32_t);
+            ddSize += sizeof(uint32_t);
+        }
+        if (ddOffset + kDataDescriptorSize > size_) {
+            fprintf(stderr,
+                    "Error reading trailing data descriptor in file '%s' at offset %lld, file size "
+                    "%lld\n",
+                    path_.c_str(), static_cast<long long>(ddOffset), static_cast<long long>(size_));
+            return 0;
+        }
+
+        dd = reinterpret_cast<const DataDescriptor*>(ddMapped.data() + localDDOffset);
+        localDataSize = (lfh->compression_method == kCompressStored) ? dd->uncompressed_size
+                                                                     : dd->compressed_size;
+        ddSize += sizeof(*dd);
+    } else {
+        localDataSize = (lfh->compression_method == kCompressStored) ? lfh->uncompressed_size
+                                                                     : lfh->compressed_size;
+    }
+    if (localDataSize != dataSize) {
+        fprintf(stderr,
+                "Data sizes mismatch in file '%s' at offset %lld, CDr: %lld vs LHR/DD: %lld\n",
+                path_.c_str(), static_cast<long long>(localFileHeaderOffset),
+                static_cast<long long>(dataSize), static_cast<long long>(localDataSize));
+        return 0;
+    }
+
+    return kLocalFileHeaderSize + lfh->file_name_length + lfh->extra_field_length + dataSize +
+           ddSize;
+}
diff --git a/adb/fastdeploy/deploypatchgenerator/apk_archive.h b/adb/fastdeploy/deploypatchgenerator/apk_archive.h
new file mode 100644
index 0000000..7127800
--- /dev/null
+++ b/adb/fastdeploy/deploypatchgenerator/apk_archive.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include <adb_unique_fd.h>
+
+#include "fastdeploy/proto/ApkEntry.pb.h"
+
+class ApkArchiveTester;
+
+// Manipulates an APK archive. Process it by mmaping it in order to minimize
+// I/Os.
+class ApkArchive {
+  public:
+    friend ApkArchiveTester;
+
+    // A convenience struct to store the result of search operation when
+    // locating the EoCDr, CDr, and Signature Block.
+    struct Location {
+        off_t offset = 0;
+        off_t size = 0;
+        bool valid = false;
+    };
+
+    ApkArchive(const std::string& path);
+    ~ApkArchive();
+
+    com::android::fastdeploy::APKDump ExtractMetadata();
+
+    // Parses the CDr starting from |input| and returns number of bytes consumed.
+    // Extracts local file header offset, data size and calculates MD5 hash of the record.
+    // 0 indicates invalid CDr.
+    static size_t ParseCentralDirectoryRecord(const char* input, size_t size, std::string* md5Hash,
+                                              int64_t* localFileHeaderOffset, int64_t* dataSize);
+    // Calculates Local File Entry size including header using offset and data size from CDr.
+    // 0 indicates invalid Local File Entry.
+    size_t CalculateLocalFileEntrySize(int64_t localFileHeaderOffset, int64_t dataSize) const;
+
+  private:
+    std::string ReadMetadata(Location loc) const;
+
+    // Retrieve the location of the Central Directory Record.
+    Location GetCDLocation();
+
+    // Retrieve the location of the signature block starting from Central
+    // Directory Record
+    Location GetSignatureLocation(off_t cdRecordOffset);
+
+    // Find the End of Central Directory Record, starting from the end of the
+    // file.
+    off_t FindEndOfCDRecord() const;
+
+    // Find Central Directory Record, starting from the end of the file.
+    Location FindCDRecord(const char* cursor);
+
+    // Checks if the archive can be used.
+    bool ready() const { return fd_ >= 0; }
+
+    std::string path_;
+    off_t size_;
+    unique_fd fd_;
+};
diff --git a/adb/fastdeploy/deploypatchgenerator/apk_archive_test.cpp b/adb/fastdeploy/deploypatchgenerator/apk_archive_test.cpp
new file mode 100644
index 0000000..554cb57
--- /dev/null
+++ b/adb/fastdeploy/deploypatchgenerator/apk_archive_test.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <iostream>
+
+#include <gtest/gtest.h>
+
+#include "apk_archive.h"
+
+// Friend test to get around private scope of ApkArchive private functions.
+class ApkArchiveTester {
+  public:
+    ApkArchiveTester(const std::string& path) : archive_(path) {}
+
+    bool ready() { return archive_.ready(); }
+
+    auto ExtractMetadata() { return archive_.ExtractMetadata(); }
+
+    ApkArchive::Location GetCDLocation() { return archive_.GetCDLocation(); }
+    ApkArchive::Location GetSignatureLocation(size_t start) {
+        return archive_.GetSignatureLocation(start);
+    }
+
+  private:
+    ApkArchive archive_;
+};
+
+TEST(ApkArchiveTest, TestApkArchiveSizes) {
+    ApkArchiveTester archiveTester("fastdeploy/testdata/sample.apk");
+    EXPECT_TRUE(archiveTester.ready());
+
+    ApkArchive::Location cdLoc = archiveTester.GetCDLocation();
+    EXPECT_TRUE(cdLoc.valid);
+    ASSERT_EQ(cdLoc.offset, 2044145u);
+    ASSERT_EQ(cdLoc.size, 49390u);
+
+    // Check that block can be retrieved
+    ApkArchive::Location sigLoc = archiveTester.GetSignatureLocation(cdLoc.offset);
+    EXPECT_TRUE(sigLoc.valid);
+    ASSERT_EQ(sigLoc.offset, 2040049u);
+    ASSERT_EQ(sigLoc.size, 4088u);
+}
+
+TEST(ApkArchiveTest, TestApkArchiveDump) {
+    ApkArchiveTester archiveTester("fastdeploy/testdata/sample.apk");
+    EXPECT_TRUE(archiveTester.ready());
+
+    auto dump = archiveTester.ExtractMetadata();
+    ASSERT_EQ(dump.cd().size(), 49390u);
+    ASSERT_EQ(dump.signature().size(), 4088u);
+}
+
+TEST(ApkArchiveTest, WrongApk) {
+    ApkArchiveTester archiveTester("fastdeploy/testdata/sample.cd");
+    EXPECT_TRUE(archiveTester.ready());
+
+    auto dump = archiveTester.ExtractMetadata();
+    ASSERT_EQ(dump.cd().size(), 0u);
+    ASSERT_EQ(dump.signature().size(), 0u);
+}
diff --git a/adb/fastdeploy/deploypatchgenerator/deploy_patch_generator.cpp b/adb/fastdeploy/deploypatchgenerator/deploy_patch_generator.cpp
index 22c9243..8aa7da7 100644
--- a/adb/fastdeploy/deploypatchgenerator/deploy_patch_generator.cpp
+++ b/adb/fastdeploy/deploypatchgenerator/deploy_patch_generator.cpp
@@ -25,8 +25,12 @@
 #include <iostream>
 #include <sstream>
 #include <string>
+#include <unordered_map>
+
+#include <openssl/md5.h>
 
 #include "adb_unique_fd.h"
+#include "adb_utils.h"
 #include "android-base/file.h"
 #include "patch_utils.h"
 #include "sysdeps.h"
@@ -34,9 +38,6 @@
 using namespace com::android::fastdeploy;
 
 void DeployPatchGenerator::Log(const char* fmt, ...) {
-    if (!is_verbose_) {
-        return;
-    }
     va_list ap;
     va_start(ap, fmt);
     vprintf(fmt, ap);
@@ -44,19 +45,34 @@
     va_end(ap);
 }
 
-void DeployPatchGenerator::APKEntryToLog(const APKEntry& entry) {
-    Log("Filename: %s", entry.filename().c_str());
-    Log("CRC32: 0x%08llX", entry.crc32());
-    Log("Data Offset: %lld", entry.dataoffset());
-    Log("Compressed Size: %lld", entry.compressedsize());
-    Log("Uncompressed Size: %lld", entry.uncompressedsize());
+static std::string HexEncode(const void* in_buffer, unsigned int size) {
+    static const char kHexChars[] = "0123456789ABCDEF";
+
+    // Each input byte creates two output hex characters.
+    std::string out_buffer(size * 2, '\0');
+
+    for (unsigned int i = 0; i < size; ++i) {
+        char byte = ((const uint8_t*)in_buffer)[i];
+        out_buffer[(i << 1)] = kHexChars[(byte >> 4) & 0xf];
+        out_buffer[(i << 1) + 1] = kHexChars[byte & 0xf];
+    }
+    return out_buffer;
 }
 
-void DeployPatchGenerator::APKMetaDataToLog(const char* file, const APKMetaData& metadata) {
+void DeployPatchGenerator::APKEntryToLog(const APKEntry& entry) {
     if (!is_verbose_) {
         return;
     }
-    Log("APK Metadata: %s", file);
+    Log("MD5: %s", HexEncode(entry.md5().data(), entry.md5().size()).c_str());
+    Log("Data Offset: %" PRId64, entry.dataoffset());
+    Log("Data Size: %" PRId64, entry.datasize());
+}
+
+void DeployPatchGenerator::APKMetaDataToLog(const APKMetaData& metadata) {
+    if (!is_verbose_) {
+        return;
+    }
+    Log("APK Metadata: %s", metadata.absolute_path().c_str());
     for (int i = 0; i < metadata.entries_size(); i++) {
         const APKEntry& entry = metadata.entries(i);
         APKEntryToLog(entry);
@@ -65,49 +81,93 @@
 
 void DeployPatchGenerator::ReportSavings(const std::vector<SimpleEntry>& identicalEntries,
                                          uint64_t totalSize) {
-    long totalEqualBytes = 0;
-    int totalEqualFiles = 0;
+    uint64_t totalEqualBytes = 0;
+    uint64_t totalEqualFiles = 0;
     for (size_t i = 0; i < identicalEntries.size(); i++) {
         if (identicalEntries[i].deviceEntry != nullptr) {
-            totalEqualBytes += identicalEntries[i].localEntry->compressedsize();
+            totalEqualBytes += identicalEntries[i].localEntry->datasize();
             totalEqualFiles++;
         }
     }
-    float savingPercent = (totalEqualBytes * 100.0f) / totalSize;
-    fprintf(stderr, "Detected %d equal APK entries\n", totalEqualFiles);
-    fprintf(stderr, "%ld bytes are equal out of %" PRIu64 " (%.2f%%)\n", totalEqualBytes, totalSize,
-            savingPercent);
+    double savingPercent = (totalEqualBytes * 100.0f) / totalSize;
+    fprintf(stderr, "Detected %" PRIu64 " equal APK entries\n", totalEqualFiles);
+    fprintf(stderr, "%" PRIu64 " bytes are equal out of %" PRIu64 " (%.2f%%)\n", totalEqualBytes,
+            totalSize, savingPercent);
+}
+
+struct PatchEntry {
+    int64_t deltaFromDeviceDataStart = 0;
+    int64_t deviceDataOffset = 0;
+    int64_t deviceDataLength = 0;
+};
+static void WritePatchEntry(const PatchEntry& patchEntry, borrowed_fd input, borrowed_fd output,
+                            size_t* realSizeOut) {
+    if (!(patchEntry.deltaFromDeviceDataStart | patchEntry.deviceDataOffset |
+          patchEntry.deviceDataLength)) {
+        return;
+    }
+
+    PatchUtils::WriteLong(patchEntry.deltaFromDeviceDataStart, output);
+    if (patchEntry.deltaFromDeviceDataStart > 0) {
+        PatchUtils::Pipe(input, output, patchEntry.deltaFromDeviceDataStart);
+    }
+    auto hostDataLength = patchEntry.deviceDataLength;
+    adb_lseek(input, hostDataLength, SEEK_CUR);
+
+    PatchUtils::WriteLong(patchEntry.deviceDataOffset, output);
+    PatchUtils::WriteLong(patchEntry.deviceDataLength, output);
+
+    *realSizeOut += patchEntry.deltaFromDeviceDataStart + hostDataLength;
 }
 
 void DeployPatchGenerator::GeneratePatch(const std::vector<SimpleEntry>& entriesToUseOnDevice,
-                                         const char* localApkPath, borrowed_fd output) {
-    unique_fd input(adb_open(localApkPath, O_RDONLY | O_CLOEXEC));
+                                         const std::string& localApkPath,
+                                         const std::string& deviceApkPath, borrowed_fd output) {
+    unique_fd input(adb_open(localApkPath.c_str(), O_RDONLY | O_CLOEXEC));
     size_t newApkSize = adb_lseek(input, 0L, SEEK_END);
     adb_lseek(input, 0L, SEEK_SET);
 
+    // Header.
     PatchUtils::WriteSignature(output);
     PatchUtils::WriteLong(newApkSize, output);
+    PatchUtils::WriteString(deviceApkPath, output);
+
     size_t currentSizeOut = 0;
+    size_t realSizeOut = 0;
     // Write data from the host upto the first entry we have that matches a device entry. Then write
     // the metadata about the device entry and repeat for all entries that match on device. Finally
     // write out any data left. If the device and host APKs are exactly the same this ends up
     // writing out zip metadata from the local APK followed by offsets to the data to use from the
     // device APK.
-    for (auto&& entry : entriesToUseOnDevice) {
-        int64_t deviceDataOffset = entry.deviceEntry->dataoffset();
+    PatchEntry patchEntry;
+    for (size_t i = 0, size = entriesToUseOnDevice.size(); i < size; ++i) {
+        auto&& entry = entriesToUseOnDevice[i];
         int64_t hostDataOffset = entry.localEntry->dataoffset();
-        int64_t deviceDataLength = entry.deviceEntry->compressedsize();
+        int64_t hostDataLength = entry.localEntry->datasize();
+        int64_t deviceDataOffset = entry.deviceEntry->dataoffset();
+        // Both entries are the same, using host data length.
+        int64_t deviceDataLength = hostDataLength;
+
         int64_t deltaFromDeviceDataStart = hostDataOffset - currentSizeOut;
-        PatchUtils::WriteLong(deltaFromDeviceDataStart, output);
         if (deltaFromDeviceDataStart > 0) {
-            PatchUtils::Pipe(input, output, deltaFromDeviceDataStart);
+            WritePatchEntry(patchEntry, input, output, &realSizeOut);
+            patchEntry.deltaFromDeviceDataStart = deltaFromDeviceDataStart;
+            patchEntry.deviceDataOffset = deviceDataOffset;
+            patchEntry.deviceDataLength = deviceDataLength;
+        } else {
+            patchEntry.deviceDataLength += deviceDataLength;
         }
-        PatchUtils::WriteLong(deviceDataOffset, output);
-        PatchUtils::WriteLong(deviceDataLength, output);
-        adb_lseek(input, deviceDataLength, SEEK_CUR);
-        currentSizeOut += deltaFromDeviceDataStart + deviceDataLength;
+
+        currentSizeOut += deltaFromDeviceDataStart + hostDataLength;
     }
-    if (currentSizeOut != newApkSize) {
+    WritePatchEntry(patchEntry, input, output, &realSizeOut);
+    if (realSizeOut != currentSizeOut) {
+        fprintf(stderr, "Size mismatch current %lld vs real %lld\n",
+                static_cast<long long>(currentSizeOut), static_cast<long long>(realSizeOut));
+        error_exit("Aborting");
+    }
+
+    if (newApkSize > currentSizeOut) {
         PatchUtils::WriteLong(newApkSize - currentSizeOut, output);
         PatchUtils::Pipe(input, output, newApkSize - currentSizeOut);
         PatchUtils::WriteLong(0, output);
@@ -115,44 +175,72 @@
     }
 }
 
-bool DeployPatchGenerator::CreatePatch(const char* localApkPath, const char* deviceApkMetadataPath,
-                                       borrowed_fd output) {
-    std::string content;
-    APKMetaData deviceApkMetadata;
-    if (android::base::ReadFileToString(deviceApkMetadataPath, &content)) {
-        deviceApkMetadata.ParsePartialFromString(content);
-    } else {
-        // TODO: What do we want to do if we don't find any metadata.
-        // The current fallback behavior is to build a patch with the contents of |localApkPath|.
-    }
+bool DeployPatchGenerator::CreatePatch(const char* localApkPath, APKMetaData deviceApkMetadata,
+                                       android::base::borrowed_fd output) {
+    return CreatePatch(PatchUtils::GetHostAPKMetaData(localApkPath), std::move(deviceApkMetadata),
+                       output);
+}
 
-    APKMetaData localApkMetadata = PatchUtils::GetAPKMetaData(localApkPath);
-    // Log gathered metadata info.
-    APKMetaDataToLog(deviceApkMetadataPath, deviceApkMetadata);
-    APKMetaDataToLog(localApkPath, localApkMetadata);
+bool DeployPatchGenerator::CreatePatch(APKMetaData localApkMetadata, APKMetaData deviceApkMetadata,
+                                       borrowed_fd output) {
+    // Log metadata info.
+    APKMetaDataToLog(deviceApkMetadata);
+    APKMetaDataToLog(localApkMetadata);
+
+    const std::string localApkPath = localApkMetadata.absolute_path();
+    const std::string deviceApkPath = deviceApkMetadata.absolute_path();
 
     std::vector<SimpleEntry> identicalEntries;
     uint64_t totalSize =
             BuildIdenticalEntries(identicalEntries, localApkMetadata, deviceApkMetadata);
     ReportSavings(identicalEntries, totalSize);
-    GeneratePatch(identicalEntries, localApkPath, output);
+    GeneratePatch(identicalEntries, localApkPath, deviceApkPath, output);
+
     return true;
 }
 
 uint64_t DeployPatchGenerator::BuildIdenticalEntries(std::vector<SimpleEntry>& outIdenticalEntries,
                                                      const APKMetaData& localApkMetadata,
                                                      const APKMetaData& deviceApkMetadata) {
+    outIdenticalEntries.reserve(
+            std::min(localApkMetadata.entries_size(), deviceApkMetadata.entries_size()));
+
+    using md5Digest = std::pair<uint64_t, uint64_t>;
+    struct md5Hash {
+        size_t operator()(const md5Digest& digest) const {
+            std::hash<uint64_t> hasher;
+            size_t seed = 0;
+            seed ^= hasher(digest.first) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+            seed ^= hasher(digest.second) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+            return seed;
+        }
+    };
+    static_assert(sizeof(md5Digest) == MD5_DIGEST_LENGTH);
+    std::unordered_map<md5Digest, std::vector<const APKEntry*>, md5Hash> deviceEntries;
+    for (const auto& deviceEntry : deviceApkMetadata.entries()) {
+        md5Digest md5;
+        memcpy(&md5, deviceEntry.md5().data(), deviceEntry.md5().size());
+
+        deviceEntries[md5].push_back(&deviceEntry);
+    }
+
     uint64_t totalSize = 0;
-    for (int i = 0; i < localApkMetadata.entries_size(); i++) {
-        const APKEntry& localEntry = localApkMetadata.entries(i);
-        totalSize += localEntry.compressedsize();
-        for (int j = 0; j < deviceApkMetadata.entries_size(); j++) {
-            const APKEntry& deviceEntry = deviceApkMetadata.entries(j);
-            if (deviceEntry.crc32() == localEntry.crc32() &&
-                deviceEntry.filename().compare(localEntry.filename()) == 0) {
+    for (const auto& localEntry : localApkMetadata.entries()) {
+        totalSize += localEntry.datasize();
+
+        md5Digest md5;
+        memcpy(&md5, localEntry.md5().data(), localEntry.md5().size());
+
+        auto deviceEntriesIt = deviceEntries.find(md5);
+        if (deviceEntriesIt == deviceEntries.end()) {
+            continue;
+        }
+
+        for (const auto* deviceEntry : deviceEntriesIt->second) {
+            if (deviceEntry->md5() == localEntry.md5()) {
                 SimpleEntry simpleEntry;
-                simpleEntry.localEntry = const_cast<APKEntry*>(&localEntry);
-                simpleEntry.deviceEntry = const_cast<APKEntry*>(&deviceEntry);
+                simpleEntry.localEntry = &localEntry;
+                simpleEntry.deviceEntry = deviceEntry;
                 APKEntryToLog(localEntry);
                 outIdenticalEntries.push_back(simpleEntry);
                 break;
@@ -164,4 +252,4 @@
                   return lhs.localEntry->dataoffset() < rhs.localEntry->dataoffset();
               });
     return totalSize;
-}
\ No newline at end of file
+}
diff --git a/adb/fastdeploy/deploypatchgenerator/deploy_patch_generator.h b/adb/fastdeploy/deploypatchgenerator/deploy_patch_generator.h
index 30e41a5..fd7eaee 100644
--- a/adb/fastdeploy/deploypatchgenerator/deploy_patch_generator.h
+++ b/adb/fastdeploy/deploypatchgenerator/deploy_patch_generator.h
@@ -27,12 +27,15 @@
  */
 class DeployPatchGenerator {
   public:
+    using APKEntry = com::android::fastdeploy::APKEntry;
+    using APKMetaData = com::android::fastdeploy::APKMetaData;
+
     /**
      * Simple struct to hold mapping between local metadata and device metadata.
      */
     struct SimpleEntry {
-        com::android::fastdeploy::APKEntry* localEntry;
-        com::android::fastdeploy::APKEntry* deviceEntry;
+        const APKEntry* localEntry;
+        const APKEntry* deviceEntry;
     };
 
     /**
@@ -41,10 +44,10 @@
      */
     explicit DeployPatchGenerator(bool is_verbose) : is_verbose_(is_verbose) {}
     /**
-     * Given a |localApkPath|, and the |deviceApkMetadataPath| from an installed APK this function
+     * Given a |localApkPath|, and the |deviceApkMetadata| from an installed APK this function
      * writes a patch to the given |output|.
      */
-    bool CreatePatch(const char* localApkPath, const char* deviceApkMetadataPath,
+    bool CreatePatch(const char* localApkPath, APKMetaData deviceApkMetadata,
                      android::base::borrowed_fd output);
 
   private:
@@ -57,14 +60,20 @@
 
     /**
      * Helper function to log the APKMetaData structure. If |is_verbose_| is false this function
-     * early outs. |file| is the path to the file represented by |metadata|. This function is used
-     * for debugging / information.
+     * early outs. This function is used for debugging / information.
      */
-    void APKMetaDataToLog(const char* file, const com::android::fastdeploy::APKMetaData& metadata);
+    void APKMetaDataToLog(const APKMetaData& metadata);
     /**
      * Helper function to log APKEntry.
      */
-    void APKEntryToLog(const com::android::fastdeploy::APKEntry& entry);
+    void APKEntryToLog(const APKEntry& entry);
+
+    /**
+     * Given the |localApkMetadata| metadata, and the |deviceApkMetadata| from an installed APK this
+     * function writes a patch to the given |output|.
+     */
+    bool CreatePatch(APKMetaData localApkMetadata, APKMetaData deviceApkMetadata,
+                     android::base::borrowed_fd output);
 
     /**
      * Helper function to report savings by fastdeploy. This function prints out savings even with
@@ -92,11 +101,11 @@
      * highest.
      */
     void GeneratePatch(const std::vector<SimpleEntry>& entriesToUseOnDevice,
-                       const char* localApkPath, android::base::borrowed_fd output);
+                       const std::string& localApkPath, const std::string& deviceApkPath,
+                       android::base::borrowed_fd output);
 
   protected:
-    uint64_t BuildIdenticalEntries(
-            std::vector<SimpleEntry>& outIdenticalEntries,
-            const com::android::fastdeploy::APKMetaData& localApkMetadata,
-            const com::android::fastdeploy::APKMetaData& deviceApkMetadataPath);
-};
\ No newline at end of file
+    uint64_t BuildIdenticalEntries(std::vector<SimpleEntry>& outIdenticalEntries,
+                                   const APKMetaData& localApkMetadata,
+                                   const APKMetaData& deviceApkMetadata);
+};
diff --git a/adb/fastdeploy/deploypatchgenerator/deploy_patch_generator_test.cpp b/adb/fastdeploy/deploypatchgenerator/deploy_patch_generator_test.cpp
index 9cdc44e..e4c96ea 100644
--- a/adb/fastdeploy/deploypatchgenerator/deploy_patch_generator_test.cpp
+++ b/adb/fastdeploy/deploypatchgenerator/deploy_patch_generator_test.cpp
@@ -15,6 +15,7 @@
  */
 
 #include "deploy_patch_generator.h"
+#include "apk_archive.h"
 #include "patch_utils.h"
 
 #include <android-base/file.h>
@@ -31,21 +32,17 @@
     return "fastdeploy/testdata/" + name;
 }
 
-class TestPatchGenerator : DeployPatchGenerator {
-  public:
-    TestPatchGenerator() : DeployPatchGenerator(false) {}
-    void GatherIdenticalEntries(std::vector<DeployPatchGenerator::SimpleEntry>& outIdenticalEntries,
-                                const APKMetaData& metadataA, const APKMetaData& metadataB) {
-        BuildIdenticalEntries(outIdenticalEntries, metadataA, metadataB);
-    }
+struct TestPatchGenerator : DeployPatchGenerator {
+    using DeployPatchGenerator::BuildIdenticalEntries;
+    using DeployPatchGenerator::DeployPatchGenerator;
 };
 
 TEST(DeployPatchGeneratorTest, IdenticalFileEntries) {
     std::string apkPath = GetTestFile("rotating_cube-release.apk");
-    APKMetaData metadataA = PatchUtils::GetAPKMetaData(apkPath.c_str());
-    TestPatchGenerator generator;
+    APKMetaData metadataA = PatchUtils::GetHostAPKMetaData(apkPath.c_str());
+    TestPatchGenerator generator(false);
     std::vector<DeployPatchGenerator::SimpleEntry> entries;
-    generator.GatherIdenticalEntries(entries, metadataA, metadataA);
+    generator.BuildIdenticalEntries(entries, metadataA, metadataA);
     // Expect the entry count to match the number of entries in the metadata.
     const uint32_t identicalCount = entries.size();
     const uint32_t entriesCount = metadataA.entries_size();
@@ -64,9 +61,28 @@
     // Create a patch that is 100% different.
     TemporaryFile output;
     DeployPatchGenerator generator(true);
-    generator.CreatePatch(apkPath.c_str(), "", output.fd);
+    generator.CreatePatch(apkPath.c_str(), {}, output.fd);
 
     // Expect a patch file that has a size at least the size of our initial APK.
     long patchSize = adb_lseek(output.fd, 0L, SEEK_END);
     EXPECT_GT(patchSize, apkSize);
-}
\ No newline at end of file
+}
+
+TEST(DeployPatchGeneratorTest, ZeroSizePatch) {
+    std::string apkPath = GetTestFile("rotating_cube-release.apk");
+    ApkArchive archive(apkPath);
+    auto dump = archive.ExtractMetadata();
+    EXPECT_NE(dump.cd().size(), 0u);
+
+    APKMetaData metadata = PatchUtils::GetDeviceAPKMetaData(dump);
+
+    // Create a patch that is 100% the same.
+    TemporaryFile output;
+    output.DoNotRemove();
+    DeployPatchGenerator generator(true);
+    generator.CreatePatch(apkPath.c_str(), metadata, output.fd);
+
+    // Expect a patch file that is smaller than 0.5K.
+    int64_t patchSize = adb_lseek(output.fd, 0L, SEEK_END);
+    EXPECT_LE(patchSize, 512);
+}
diff --git a/adb/fastdeploy/deploypatchgenerator/patch_utils.cpp b/adb/fastdeploy/deploypatchgenerator/patch_utils.cpp
index f11ddd1..2b00c80 100644
--- a/adb/fastdeploy/deploypatchgenerator/patch_utils.cpp
+++ b/adb/fastdeploy/deploypatchgenerator/patch_utils.cpp
@@ -16,72 +16,94 @@
 
 #include "patch_utils.h"
 
-#include <androidfw/ZipFileRO.h>
 #include <stdio.h>
 
 #include "adb_io.h"
+#include "adb_utils.h"
 #include "android-base/endian.h"
 #include "sysdeps.h"
 
+#include "apk_archive.h"
+
 using namespace com::android;
 using namespace com::android::fastdeploy;
 using namespace android::base;
 
 static constexpr char kSignature[] = "FASTDEPLOY";
 
-APKMetaData PatchUtils::GetAPKMetaData(const char* apkPath) {
+APKMetaData PatchUtils::GetDeviceAPKMetaData(const APKDump& apk_dump) {
     APKMetaData apkMetaData;
-#undef open
-    std::unique_ptr<android::ZipFileRO> zipFile(android::ZipFileRO::open(apkPath));
-#define open ___xxx_unix_open
-    if (zipFile == nullptr) {
-        printf("Could not open %s", apkPath);
-        exit(1);
-    }
-    void* cookie;
-    if (zipFile->startIteration(&cookie)) {
-        android::ZipEntryRO entry;
-        while ((entry = zipFile->nextEntry(cookie)) != NULL) {
-            char fileName[256];
-            // Make sure we have a file name.
-            // TODO: Handle filenames longer than 256.
-            if (zipFile->getEntryFileName(entry, fileName, sizeof(fileName))) {
-                continue;
-            }
+    apkMetaData.set_absolute_path(apk_dump.absolute_path());
 
-            uint32_t uncompressedSize, compressedSize, crc32;
-            int64_t dataOffset;
-            zipFile->getEntryInfo(entry, nullptr, &uncompressedSize, &compressedSize, &dataOffset,
-                                  nullptr, &crc32);
-            APKEntry* apkEntry = apkMetaData.add_entries();
-            apkEntry->set_crc32(crc32);
-            apkEntry->set_filename(fileName);
-            apkEntry->set_compressedsize(compressedSize);
-            apkEntry->set_uncompressedsize(uncompressedSize);
-            apkEntry->set_dataoffset(dataOffset);
-        }
+    std::string md5Hash;
+    int64_t localFileHeaderOffset;
+    int64_t dataSize;
+
+    const auto& cd = apk_dump.cd();
+    auto cur = cd.data();
+    int64_t size = cd.size();
+    while (auto consumed = ApkArchive::ParseCentralDirectoryRecord(
+                   cur, size, &md5Hash, &localFileHeaderOffset, &dataSize)) {
+        cur += consumed;
+        size -= consumed;
+
+        auto apkEntry = apkMetaData.add_entries();
+        apkEntry->set_md5(md5Hash);
+        apkEntry->set_dataoffset(localFileHeaderOffset);
+        apkEntry->set_datasize(dataSize);
     }
     return apkMetaData;
 }
 
+APKMetaData PatchUtils::GetHostAPKMetaData(const char* apkPath) {
+    ApkArchive archive(apkPath);
+    auto dump = archive.ExtractMetadata();
+    if (dump.cd().empty()) {
+        fprintf(stderr, "adb: Could not extract Central Directory from %s\n", apkPath);
+        error_exit("Aborting");
+    }
+
+    auto apkMetaData = GetDeviceAPKMetaData(dump);
+
+    // Now let's set data sizes.
+    for (auto& apkEntry : *apkMetaData.mutable_entries()) {
+        auto dataSize =
+                archive.CalculateLocalFileEntrySize(apkEntry.dataoffset(), apkEntry.datasize());
+        if (dataSize == 0) {
+            error_exit("Aborting");
+        }
+        apkEntry.set_datasize(dataSize);
+    }
+
+    return apkMetaData;
+}
+
 void PatchUtils::WriteSignature(borrowed_fd output) {
     WriteFdExactly(output, kSignature, sizeof(kSignature) - 1);
 }
 
 void PatchUtils::WriteLong(int64_t value, borrowed_fd output) {
-    int64_t toLittleEndian = htole64(value);
-    WriteFdExactly(output, &toLittleEndian, sizeof(int64_t));
+    int64_t littleEndian = htole64(value);
+    WriteFdExactly(output, &littleEndian, sizeof(littleEndian));
+}
+
+void PatchUtils::WriteString(const std::string& value, android::base::borrowed_fd output) {
+    WriteLong(value.size(), output);
+    WriteFdExactly(output, value);
 }
 
 void PatchUtils::Pipe(borrowed_fd input, borrowed_fd output, size_t amount) {
-    constexpr static int BUFFER_SIZE = 128 * 1024;
+    constexpr static size_t BUFFER_SIZE = 128 * 1024;
     char buffer[BUFFER_SIZE];
     size_t transferAmount = 0;
     while (transferAmount != amount) {
-        long chunkAmount =
-                amount - transferAmount > BUFFER_SIZE ? BUFFER_SIZE : amount - transferAmount;
-        long readAmount = adb_read(input, buffer, chunkAmount);
+        auto chunkAmount = std::min(amount - transferAmount, BUFFER_SIZE);
+        auto readAmount = adb_read(input, buffer, chunkAmount);
+        if (readAmount < 0) {
+            fprintf(stderr, "adb: failed to read from input: %s\n", strerror(errno));
+            error_exit("Aborting");
+        }
         WriteFdExactly(output, buffer, readAmount);
         transferAmount += readAmount;
     }
-}
\ No newline at end of file
+}
diff --git a/adb/fastdeploy/deploypatchgenerator/patch_utils.h b/adb/fastdeploy/deploypatchgenerator/patch_utils.h
index 0ebfe8f..8dc9b9c 100644
--- a/adb/fastdeploy/deploypatchgenerator/patch_utils.h
+++ b/adb/fastdeploy/deploypatchgenerator/patch_utils.h
@@ -25,11 +25,18 @@
 class PatchUtils {
   public:
     /**
+     * This function takes the dump of Central Directly and builds the APKMetaData required by the
+     * patching algorithm. The if this function has an error a string is printed to the terminal and
+     * exit(1) is called.
+     */
+    static com::android::fastdeploy::APKMetaData GetDeviceAPKMetaData(
+            const com::android::fastdeploy::APKDump& apk_dump);
+    /**
      * This function takes a local APK file and builds the APKMetaData required by the patching
      * algorithm. The if this function has an error a string is printed to the terminal and exit(1)
      * is called.
      */
-    static com::android::fastdeploy::APKMetaData GetAPKMetaData(const char* file);
+    static com::android::fastdeploy::APKMetaData GetHostAPKMetaData(const char* file);
     /**
      * Writes a fixed signature string to the header of the patch.
      */
@@ -39,8 +46,12 @@
      */
     static void WriteLong(int64_t value, android::base::borrowed_fd output);
     /**
+     * Writes string to the |output|.
+     */
+    static void WriteString(const std::string& value, android::base::borrowed_fd output);
+    /**
      * Copy |amount| of data from |input| to |output|.
      */
     static void Pipe(android::base::borrowed_fd input, android::base::borrowed_fd output,
                      size_t amount);
-};
\ No newline at end of file
+};
diff --git a/adb/fastdeploy/deploypatchgenerator/patch_utils_test.cpp b/adb/fastdeploy/deploypatchgenerator/patch_utils_test.cpp
index a7eeebf..3ec5ab3 100644
--- a/adb/fastdeploy/deploypatchgenerator/patch_utils_test.cpp
+++ b/adb/fastdeploy/deploypatchgenerator/patch_utils_test.cpp
@@ -23,10 +23,13 @@
 #include <sstream>
 #include <string>
 
+#include <google/protobuf/util/message_differencer.h>
+
 #include "adb_io.h"
 #include "sysdeps.h"
 
 using namespace com::android::fastdeploy;
+using google::protobuf::util::MessageDifferencer;
 
 static std::string GetTestFile(const std::string& name) {
     return "fastdeploy/testdata/" + name;
@@ -86,11 +89,56 @@
 
 TEST(PatchUtilsTest, GatherMetadata) {
     std::string apkFile = GetTestFile("rotating_cube-release.apk");
-    APKMetaData metadata = PatchUtils::GetAPKMetaData(apkFile.c_str());
+    APKMetaData actual = PatchUtils::GetHostAPKMetaData(apkFile.c_str());
+
     std::string expectedMetadata;
     android::base::ReadFileToString(GetTestFile("rotating_cube-metadata-release.data"),
                                     &expectedMetadata);
+    APKMetaData expected;
+    EXPECT_TRUE(expected.ParseFromString(expectedMetadata));
+
+    // Test paths might vary.
+    expected.set_absolute_path(actual.absolute_path());
+
     std::string actualMetadata;
-    metadata.SerializeToString(&actualMetadata);
+    actual.SerializeToString(&actualMetadata);
+
+    expected.SerializeToString(&expectedMetadata);
+
     EXPECT_EQ(expectedMetadata, actualMetadata);
-}
\ No newline at end of file
+}
+
+static inline void sanitize(APKMetaData& metadata) {
+    metadata.clear_absolute_path();
+    for (auto&& entry : *metadata.mutable_entries()) {
+        entry.clear_datasize();
+    }
+}
+
+TEST(PatchUtilsTest, GatherDumpMetadata) {
+    APKMetaData hostMetadata;
+    APKMetaData deviceMetadata;
+
+    hostMetadata = PatchUtils::GetHostAPKMetaData(GetTestFile("sample.apk").c_str());
+
+    {
+        std::string cd;
+        android::base::ReadFileToString(GetTestFile("sample.cd"), &cd);
+
+        APKDump dump;
+        dump.set_cd(std::move(cd));
+
+        deviceMetadata = PatchUtils::GetDeviceAPKMetaData(dump);
+    }
+
+    sanitize(hostMetadata);
+    sanitize(deviceMetadata);
+
+    std::string expectedMetadata;
+    hostMetadata.SerializeToString(&expectedMetadata);
+
+    std::string actualMetadata;
+    deviceMetadata.SerializeToString(&actualMetadata);
+
+    EXPECT_EQ(expectedMetadata, actualMetadata);
+}
diff --git a/adb/fastdeploy/proto/ApkEntry.proto b/adb/fastdeploy/proto/ApkEntry.proto
index 9460d15..d84c5a5 100644
--- a/adb/fastdeploy/proto/ApkEntry.proto
+++ b/adb/fastdeploy/proto/ApkEntry.proto
@@ -1,18 +1,26 @@
-syntax = "proto2";
+syntax = "proto3";
 
 package com.android.fastdeploy;
 
 option java_package = "com.android.fastdeploy";
+option java_outer_classname = "ApkEntryProto";
 option java_multiple_files = true;
+option optimize_for = LITE_RUNTIME;
+
+message APKDump {
+    string name = 1;
+    bytes cd = 2;
+    bytes signature = 3;
+    string absolute_path = 4;
+}
 
 message APKEntry {
-    required int64 crc32 = 1;
-    required string fileName = 2;
-    required int64 dataOffset = 3;
-    required int64 compressedSize = 4;
-    required int64 uncompressedSize = 5;
+    bytes md5 = 1;
+    int64 dataOffset = 2;
+    int64 dataSize = 3;
 }
 
 message APKMetaData {
-    repeated APKEntry entries = 1;
+    string absolute_path = 1;
+    repeated APKEntry entries = 2;
 }
diff --git a/adb/fastdeploy/testdata/helloworld5.apk b/adb/fastdeploy/testdata/helloworld5.apk
new file mode 100644
index 0000000..4a1539e
--- /dev/null
+++ b/adb/fastdeploy/testdata/helloworld5.apk
Binary files differ
diff --git a/adb/fastdeploy/testdata/helloworld7.apk b/adb/fastdeploy/testdata/helloworld7.apk
new file mode 100644
index 0000000..82c46df
--- /dev/null
+++ b/adb/fastdeploy/testdata/helloworld7.apk
Binary files differ
diff --git a/adb/fastdeploy/testdata/rotating_cube-metadata-release.data b/adb/fastdeploy/testdata/rotating_cube-metadata-release.data
index 0671bf3..52352ff 100644
--- a/adb/fastdeploy/testdata/rotating_cube-metadata-release.data
+++ b/adb/fastdeploy/testdata/rotating_cube-metadata-release.data
Binary files differ
diff --git a/adb/fastdeploy/testdata/sample.apk b/adb/fastdeploy/testdata/sample.apk
new file mode 100644
index 0000000..c316205
--- /dev/null
+++ b/adb/fastdeploy/testdata/sample.apk
Binary files differ
diff --git a/adb/fastdeploy/testdata/sample.cd b/adb/fastdeploy/testdata/sample.cd
new file mode 100644
index 0000000..5e5b4d4
--- /dev/null
+++ b/adb/fastdeploy/testdata/sample.cd
Binary files differ
diff --git a/adb/fdevent/fdevent.cpp b/adb/fdevent/fdevent.cpp
index 28b8f37..562f587 100644
--- a/adb/fdevent/fdevent.cpp
+++ b/adb/fdevent/fdevent.cpp
@@ -26,16 +26,24 @@
 
 #include "adb_utils.h"
 #include "fdevent.h"
+#include "fdevent_epoll.h"
 #include "fdevent_poll.h"
 
+using namespace std::chrono_literals;
+using std::chrono::duration_cast;
+
+void invoke_fde(struct fdevent* fde, unsigned events) {
+    if (auto f = std::get_if<fd_func>(&fde->func)) {
+        (*f)(fde->fd.get(), events, fde->arg);
+    } else if (auto f = std::get_if<fd_func2>(&fde->func)) {
+        (*f)(fde, events, fde->arg);
+    } else {
+        __builtin_unreachable();
+    }
+}
+
 std::string dump_fde(const fdevent* fde) {
     std::string state;
-    if (fde->state & FDE_ACTIVE) {
-        state += "A";
-    }
-    if (fde->state & FDE_PENDING) {
-        state += "P";
-    }
     if (fde->state & FDE_READ) {
         state += "R";
     }
@@ -53,9 +61,11 @@
     CheckMainThread();
     CHECK_GE(fd.get(), 0);
 
+    int fd_num = fd.get();
+
     fdevent* fde = new fdevent();
     fde->id = fdevent_id_++;
-    fde->state = FDE_ACTIVE;
+    fde->state = 0;
     fde->fd = std::move(fd);
     fde->func = func;
     fde->arg = arg;
@@ -66,6 +76,10 @@
         LOG(ERROR) << "failed to set non-blocking mode for fd " << fde->fd.get();
     }
 
+    auto [it, inserted] = this->installed_fdevents_.emplace(fd_num, fde);
+    CHECK(inserted);
+    UNUSED(it);
+
     this->Register(fde);
     return fde;
 }
@@ -78,18 +92,22 @@
 
     this->Unregister(fde);
 
+    auto erased = this->installed_fdevents_.erase(fde->fd.get());
+    CHECK_EQ(1UL, erased);
+
     unique_fd result = std::move(fde->fd);
     delete fde;
     return result;
 }
 
 void fdevent_context::Add(fdevent* fde, unsigned events) {
-    Set(fde, (fde->state & FDE_EVENTMASK) | events);
+    CHECK(!(events & FDE_TIMEOUT));
+    Set(fde, fde->state | events);
 }
 
 void fdevent_context::Del(fdevent* fde, unsigned events) {
     CHECK(!(events & FDE_TIMEOUT));
-    Set(fde, (fde->state & FDE_EVENTMASK) & ~events);
+    Set(fde, fde->state & ~events);
 }
 
 void fdevent_context::SetTimeout(fdevent* fde, std::optional<std::chrono::milliseconds> timeout) {
@@ -98,6 +116,56 @@
     fde->last_active = std::chrono::steady_clock::now();
 }
 
+std::optional<std::chrono::milliseconds> fdevent_context::CalculatePollDuration() {
+    std::optional<std::chrono::milliseconds> result = std::nullopt;
+    auto now = std::chrono::steady_clock::now();
+    CheckMainThread();
+
+    for (const auto& [fd, fde] : this->installed_fdevents_) {
+        UNUSED(fd);
+        auto timeout_opt = fde->timeout;
+        if (timeout_opt) {
+            auto deadline = fde->last_active + *timeout_opt;
+            auto time_left = duration_cast<std::chrono::milliseconds>(deadline - now);
+            if (time_left < 0ms) {
+                time_left = 0ms;
+            }
+
+            if (!result) {
+                result = time_left;
+            } else {
+                result = std::min(*result, time_left);
+            }
+        }
+    }
+
+    return result;
+}
+
+void fdevent_context::HandleEvents(const std::vector<fdevent_event>& events) {
+    for (const auto& event : events) {
+        invoke_fde(event.fde, event.events);
+    }
+    FlushRunQueue();
+}
+
+void fdevent_context::FlushRunQueue() {
+    // We need to be careful around reentrancy here, since a function we call can queue up another
+    // function.
+    while (true) {
+        std::function<void()> fn;
+        {
+            std::lock_guard<std::mutex> lock(this->run_queue_mutex_);
+            if (this->run_queue_.empty()) {
+                break;
+            }
+            fn = std::move(this->run_queue_.front());
+            this->run_queue_.pop_front();
+        }
+        fn();
+    }
+}
+
 void fdevent_context::CheckMainThread() {
     if (main_thread_id_) {
         CHECK_EQ(*main_thread_id_, android::base::GetThreadId());
@@ -118,25 +186,16 @@
     Interrupt();
 }
 
-void fdevent_context::FlushRunQueue() {
-    // We need to be careful around reentrancy here, since a function we call can queue up another
-    // function.
-    while (true) {
-        std::function<void()> fn;
-        {
-            std::lock_guard<std::mutex> lock(this->run_queue_mutex_);
-            if (this->run_queue_.empty()) {
-                break;
-            }
-            fn = this->run_queue_.front();
-            this->run_queue_.pop_front();
-        }
-        fn();
-    }
+static std::unique_ptr<fdevent_context> fdevent_create_context() {
+#if defined(__linux__)
+    return std::make_unique<fdevent_context_epoll>();
+#else
+    return std::make_unique<fdevent_context_poll>();
+#endif
 }
 
 static auto& g_ambient_fdevent_context =
-        *new std::unique_ptr<fdevent_context>(new fdevent_context_poll());
+        *new std::unique_ptr<fdevent_context>(fdevent_create_context());
 
 static fdevent_context* fdevent_get_ambient() {
     return g_ambient_fdevent_context.get();
@@ -197,5 +256,5 @@
 }
 
 void fdevent_reset() {
-    g_ambient_fdevent_context.reset(new fdevent_context_poll());
+    g_ambient_fdevent_context = fdevent_create_context();
 }
diff --git a/adb/fdevent/fdevent.h b/adb/fdevent/fdevent.h
index 2424252..86814d7 100644
--- a/adb/fdevent/fdevent.h
+++ b/adb/fdevent/fdevent.h
@@ -26,6 +26,7 @@
 #include <functional>
 #include <mutex>
 #include <optional>
+#include <unordered_map>
 #include <variant>
 
 #include <android-base/thread_annotations.h>
@@ -38,19 +39,19 @@
 #define FDE_ERROR 0x0004
 #define FDE_TIMEOUT 0x0008
 
-// Internal states.
-#define FDE_EVENTMASK  0x00ff
-#define FDE_STATEMASK  0xff00
-
-#define FDE_ACTIVE     0x0100
-#define FDE_PENDING    0x0200
+struct fdevent;
 
 typedef void (*fd_func)(int fd, unsigned events, void *userdata);
 typedef void (*fd_func2)(struct fdevent* fde, unsigned events, void* userdata);
 
-struct fdevent;
+void invoke_fde(struct fdevent* fde, unsigned events);
 std::string dump_fde(const fdevent* fde);
 
+struct fdevent_event {
+    fdevent* fde;
+    unsigned events;
+};
+
 struct fdevent_context {
   public:
     virtual ~fdevent_context() = default;
@@ -59,14 +60,13 @@
     fdevent* Create(unique_fd fd, std::variant<fd_func, fd_func2> func, void* arg);
 
     // Deallocate an fdevent object, returning the file descriptor that was owned by it.
+    // Note that this calls Set, which is a virtual method, so destructors that call this must be
+    // final.
     unique_fd Destroy(fdevent* fde);
 
   protected:
-    // Register an fdevent that is being created by Create with the fdevent_context.
-    virtual void Register(fdevent* fde) = 0;
-
-    // Unregister an fdevent that is being destroyed by Destroy with the fdevent_context.
-    virtual void Unregister(fdevent* fde) = 0;
+    virtual void Register(fdevent*) {}
+    virtual void Unregister(fdevent*) {}
 
   public:
     // Change which events should cause notifications.
@@ -80,6 +80,15 @@
     // trigger repeatedly every |timeout| ms.
     void SetTimeout(fdevent* fde, std::optional<std::chrono::milliseconds> timeout);
 
+  protected:
+    std::optional<std::chrono::milliseconds> CalculatePollDuration();
+    void HandleEvents(const std::vector<fdevent_event>& events);
+
+  private:
+    // Run all pending functions enqueued via Run().
+    void FlushRunQueue() EXCLUDES(run_queue_mutex_);
+
+  public:
     // Loop until TerminateLoop is called, handling events.
     // Implementations should call FlushRunQueue on every iteration, and check the value of
     // terminate_loop_ to determine whether to stop.
@@ -100,12 +109,12 @@
     // Interrupt the run loop.
     virtual void Interrupt() = 0;
 
-    // Run all pending functions enqueued via Run().
-    void FlushRunQueue() EXCLUDES(run_queue_mutex_);
-
     std::optional<uint64_t> main_thread_id_ = std::nullopt;
     std::atomic<bool> terminate_loop_ = false;
 
+  protected:
+    std::unordered_map<int, fdevent*> installed_fdevents_;
+
   private:
     uint64_t fdevent_id_ = 0;
     std::mutex run_queue_mutex_;
@@ -119,7 +128,6 @@
     int force_eof = 0;
 
     uint16_t state = 0;
-    uint16_t events = 0;
     std::optional<std::chrono::milliseconds> timeout;
     std::chrono::steady_clock::time_point last_active;
 
diff --git a/adb/fdevent/fdevent_epoll.cpp b/adb/fdevent/fdevent_epoll.cpp
new file mode 100644
index 0000000..e3d1674
--- /dev/null
+++ b/adb/fdevent/fdevent_epoll.cpp
@@ -0,0 +1,200 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "fdevent_epoll.h"
+
+#if defined(__linux__)
+
+#include <sys/epoll.h>
+#include <sys/eventfd.h>
+
+#include <android-base/logging.h>
+#include <android-base/threads.h>
+
+#include "adb_unique_fd.h"
+#include "fdevent.h"
+
+static void fdevent_interrupt(int fd, unsigned, void*) {
+    uint64_t buf;
+    ssize_t rc = TEMP_FAILURE_RETRY(adb_read(fd, &buf, sizeof(buf)));
+    if (rc == -1) {
+        PLOG(FATAL) << "failed to read from fdevent interrupt fd";
+    }
+}
+
+fdevent_context_epoll::fdevent_context_epoll() {
+    epoll_fd_.reset(epoll_create1(EPOLL_CLOEXEC));
+
+    unique_fd interrupt_fd(eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK));
+    if (interrupt_fd == -1) {
+        PLOG(FATAL) << "failed to create fdevent interrupt eventfd";
+    }
+
+    unique_fd interrupt_fd_dup(fcntl(interrupt_fd.get(), F_DUPFD_CLOEXEC, 3));
+    if (interrupt_fd_dup == -1) {
+        PLOG(FATAL) << "failed to dup fdevent interrupt eventfd";
+    }
+
+    this->interrupt_fd_ = std::move(interrupt_fd_dup);
+    fdevent* fde = this->Create(std::move(interrupt_fd), fdevent_interrupt, nullptr);
+    CHECK(fde != nullptr);
+    this->Add(fde, FDE_READ);
+}
+
+fdevent_context_epoll::~fdevent_context_epoll() {
+    // Destroy calls virtual methods, but this class is final, so that's okay.
+    this->Destroy(this->interrupt_fde_);
+}
+
+static epoll_event calculate_epoll_event(fdevent* fde) {
+    epoll_event result;
+    result.events = 0;
+    if (fde->state & FDE_READ) {
+        result.events |= EPOLLIN;
+    }
+    if (fde->state & FDE_WRITE) {
+        result.events |= EPOLLOUT;
+    }
+    if (fde->state & FDE_ERROR) {
+        result.events |= EPOLLERR;
+    }
+    result.events |= EPOLLRDHUP;
+    result.data.ptr = fde;
+    return result;
+}
+
+void fdevent_context_epoll::Register(fdevent* fde) {
+    epoll_event ev = calculate_epoll_event(fde);
+    if (epoll_ctl(epoll_fd_.get(), EPOLL_CTL_ADD, fde->fd.get(), &ev) != 0) {
+        PLOG(FATAL) << "failed to register fd " << fde->fd.get() << " with epoll";
+    }
+}
+
+void fdevent_context_epoll::Unregister(fdevent* fde) {
+    if (epoll_ctl(epoll_fd_.get(), EPOLL_CTL_DEL, fde->fd.get(), nullptr) != 0) {
+        PLOG(FATAL) << "failed to unregister fd " << fde->fd.get() << " with epoll";
+    }
+}
+
+void fdevent_context_epoll::Set(fdevent* fde, unsigned events) {
+    unsigned previous_state = fde->state;
+    fde->state = events;
+
+    // If the state is the same, or only differed by FDE_TIMEOUT, we don't need to modify epoll.
+    if ((previous_state & ~FDE_TIMEOUT) == (events & ~FDE_TIMEOUT)) {
+        return;
+    }
+
+    epoll_event ev = calculate_epoll_event(fde);
+    if (epoll_ctl(epoll_fd_.get(), EPOLL_CTL_MOD, fde->fd.get(), &ev) != 0) {
+        PLOG(FATAL) << "failed to modify fd " << fde->fd.get() << " with epoll";
+    }
+}
+
+void fdevent_context_epoll::Loop() {
+    main_thread_id_ = android::base::GetThreadId();
+
+    std::vector<fdevent_event> fde_events;
+    std::vector<epoll_event> epoll_events;
+    epoll_events.resize(this->installed_fdevents_.size());
+
+    while (true) {
+        if (terminate_loop_) {
+            break;
+        }
+
+        int rc = -1;
+        while (rc == -1) {
+            std::optional<std::chrono::milliseconds> timeout = CalculatePollDuration();
+            int timeout_ms;
+            if (!timeout) {
+                timeout_ms = -1;
+            } else {
+                timeout_ms = timeout->count();
+            }
+
+            rc = epoll_wait(epoll_fd_.get(), epoll_events.data(), epoll_events.size(), timeout_ms);
+            if (rc == -1 && errno != EINTR) {
+                PLOG(FATAL) << "epoll_wait failed";
+            }
+        }
+
+        auto post_poll = std::chrono::steady_clock::now();
+        std::unordered_map<fdevent*, unsigned> event_map;
+        for (int i = 0; i < rc; ++i) {
+            fdevent* fde = static_cast<fdevent*>(epoll_events[i].data.ptr);
+
+            unsigned events = 0;
+            if (epoll_events[i].events & EPOLLIN) {
+                CHECK(fde->state & FDE_READ);
+                events |= FDE_READ;
+            }
+            if (epoll_events[i].events & EPOLLOUT) {
+                CHECK(fde->state & FDE_WRITE);
+                events |= FDE_WRITE;
+            }
+            if (epoll_events[i].events & (EPOLLERR | EPOLLHUP | EPOLLRDHUP)) {
+                // We fake a read, as the rest of the code assumes that errors will
+                // be detected at that point.
+                events |= FDE_READ | FDE_ERROR;
+            }
+
+            event_map[fde] = events;
+        }
+
+        for (const auto& [fd, fde] : installed_fdevents_) {
+            unsigned events = 0;
+            if (auto it = event_map.find(fde); it != event_map.end()) {
+                events = it->second;
+            }
+
+            if (events == 0) {
+                if (fde->timeout) {
+                    auto deadline = fde->last_active + *fde->timeout;
+                    if (deadline < post_poll) {
+                        events |= FDE_TIMEOUT;
+                    }
+                }
+            }
+
+            if (events != 0) {
+                LOG(DEBUG) << dump_fde(fde) << " got events " << std::hex << std::showbase
+                           << events;
+                fde_events.push_back({fde, events});
+                fde->last_active = post_poll;
+            }
+        }
+        this->HandleEvents(std::move(fde_events));
+        fde_events.clear();
+    }
+
+    main_thread_id_.reset();
+}
+
+size_t fdevent_context_epoll::InstalledCount() {
+    // We always have an installed fde for interrupt.
+    return this->installed_fdevents_.size() - 1;
+}
+
+void fdevent_context_epoll::Interrupt() {
+    uint64_t i = 1;
+    ssize_t rc = TEMP_FAILURE_RETRY(adb_write(this->interrupt_fd_, &i, sizeof(i)));
+    if (rc != sizeof(i)) {
+        PLOG(FATAL) << "failed to write to fdevent interrupt eventfd";
+    }
+}
+
+#endif  // defined(__linux__)
diff --git a/adb/fdevent/fdevent_epoll.h b/adb/fdevent/fdevent_epoll.h
new file mode 100644
index 0000000..684fa32
--- /dev/null
+++ b/adb/fdevent/fdevent_epoll.h
@@ -0,0 +1,61 @@
+#pragma once
+
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#if defined(__linux__)
+
+#include "sysdeps.h"
+
+#include <sys/epoll.h>
+
+#include <deque>
+#include <list>
+#include <mutex>
+#include <unordered_map>
+
+#include <android-base/thread_annotations.h>
+
+#include "adb_unique_fd.h"
+#include "fdevent.h"
+
+struct fdevent_context_epoll final : public fdevent_context {
+    fdevent_context_epoll();
+    virtual ~fdevent_context_epoll();
+
+    virtual void Register(fdevent* fde) final;
+    virtual void Unregister(fdevent* fde) final;
+
+    virtual void Set(fdevent* fde, unsigned events) final;
+
+    virtual void Loop() final;
+    size_t InstalledCount() final;
+
+  protected:
+    virtual void Interrupt() final;
+
+  public:
+    // All operations to fdevent should happen only in the main thread.
+    // That's why we don't need a lock for fdevent.
+    std::unordered_map<int, fdevent*> epoll_node_map_;
+    std::list<fdevent*> pending_list_;
+
+    unique_fd epoll_fd_;
+    unique_fd interrupt_fd_;
+    fdevent* interrupt_fde_ = nullptr;
+};
+
+#endif  // defined(__linux__)
diff --git a/adb/fdevent/fdevent_poll.cpp b/adb/fdevent/fdevent_poll.cpp
index 75ea081..cc4a7a1 100644
--- a/adb/fdevent/fdevent_poll.cpp
+++ b/adb/fdevent/fdevent_poll.cpp
@@ -75,60 +75,14 @@
 }
 
 fdevent_context_poll::~fdevent_context_poll() {
+    // Destroy calls virtual methods, but this class is final, so that's okay.
     this->Destroy(this->interrupt_fde_);
 }
 
-void fdevent_context_poll::Register(fdevent* fde) {
-    auto pair = poll_node_map_.emplace(fde->fd.get(), PollNode(fde));
-    CHECK(pair.second) << "install existing fd " << fde->fd.get();
-}
-
-void fdevent_context_poll::Unregister(fdevent* fde) {
-    if (fde->state & FDE_ACTIVE) {
-        poll_node_map_.erase(fde->fd.get());
-
-        if (fde->state & FDE_PENDING) {
-            pending_list_.remove(fde);
-        }
-        fde->state = 0;
-        fde->events = 0;
-    }
-}
-
 void fdevent_context_poll::Set(fdevent* fde, unsigned events) {
     CheckMainThread();
-    events &= FDE_EVENTMASK;
-    if ((fde->state & FDE_EVENTMASK) == events) {
-        return;
-    }
-    CHECK(fde->state & FDE_ACTIVE);
-
-    auto it = poll_node_map_.find(fde->fd.get());
-    CHECK(it != poll_node_map_.end());
-    PollNode& node = it->second;
-    if (events & FDE_READ) {
-        node.pollfd.events |= POLLIN;
-    } else {
-        node.pollfd.events &= ~POLLIN;
-    }
-
-    if (events & FDE_WRITE) {
-        node.pollfd.events |= POLLOUT;
-    } else {
-        node.pollfd.events &= ~POLLOUT;
-    }
-    fde->state = (fde->state & FDE_STATEMASK) | events;
-
+    fde->state = events;
     D("fdevent_set: %s, events = %u", dump_fde(fde).c_str(), events);
-
-    if (fde->state & FDE_PENDING) {
-        // If we are pending, make sure we don't signal an event that is no longer wanted.
-        fde->events &= events;
-        if (fde->events == 0) {
-            pending_list_.remove(fde);
-            fde->state &= ~FDE_PENDING;
-        }
-    }
 }
 
 static std::string dump_pollfds(const std::vector<adb_pollfd>& pollfds) {
@@ -146,204 +100,94 @@
     return result;
 }
 
-static std::optional<std::chrono::milliseconds> calculate_timeout(fdevent_context_poll* ctx) {
-    std::optional<std::chrono::milliseconds> result = std::nullopt;
-    auto now = std::chrono::steady_clock::now();
-    ctx->CheckMainThread();
-
-    for (const auto& [fd, pollnode] : ctx->poll_node_map_) {
-        UNUSED(fd);
-        auto timeout_opt = pollnode.fde->timeout;
-        if (timeout_opt) {
-            auto deadline = pollnode.fde->last_active + *timeout_opt;
-            auto time_left = std::chrono::duration_cast<std::chrono::milliseconds>(deadline - now);
-            if (time_left < std::chrono::milliseconds::zero()) {
-                time_left = std::chrono::milliseconds::zero();
-            }
-
-            if (!result) {
-                result = time_left;
-            } else {
-                result = std::min(*result, time_left);
-            }
-        }
-    }
-
-    return result;
-}
-
-static void fdevent_process(fdevent_context_poll* ctx) {
-    std::vector<adb_pollfd> pollfds;
-    for (const auto& pair : ctx->poll_node_map_) {
-        pollfds.push_back(pair.second.pollfd);
-    }
-    CHECK_GT(pollfds.size(), 0u);
-    D("poll(), pollfds = %s", dump_pollfds(pollfds).c_str());
-
-    auto timeout = calculate_timeout(ctx);
-    int timeout_ms;
-    if (!timeout) {
-        timeout_ms = -1;
-    } else {
-        timeout_ms = timeout->count();
-    }
-
-    int ret = adb_poll(&pollfds[0], pollfds.size(), timeout_ms);
-    if (ret == -1) {
-        PLOG(ERROR) << "poll(), ret = " << ret;
-        return;
-    }
-
-    auto post_poll = std::chrono::steady_clock::now();
-
-    for (const auto& pollfd : pollfds) {
-        if (pollfd.revents != 0) {
-            D("for fd %d, revents = %x", pollfd.fd, pollfd.revents);
-        }
-        unsigned events = 0;
-        if (pollfd.revents & POLLIN) {
-            events |= FDE_READ;
-        }
-        if (pollfd.revents & POLLOUT) {
-            events |= FDE_WRITE;
-        }
-        if (pollfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
-            // We fake a read, as the rest of the code assumes that errors will
-            // be detected at that point.
-            events |= FDE_READ | FDE_ERROR;
-        }
-#if defined(__linux__)
-        if (pollfd.revents & POLLRDHUP) {
-            events |= FDE_READ | FDE_ERROR;
-        }
-#endif
-        auto it = ctx->poll_node_map_.find(pollfd.fd);
-        CHECK(it != ctx->poll_node_map_.end());
-        fdevent* fde = it->second.fde;
-
-        if (events == 0) {
-            // Check for timeout.
-            if (fde->timeout) {
-                auto deadline = fde->last_active + *fde->timeout;
-                if (deadline < post_poll) {
-                    events |= FDE_TIMEOUT;
-                }
-            }
-        }
-
-        if (events != 0) {
-            CHECK_EQ(fde->fd.get(), pollfd.fd);
-            fde->events |= events;
-            fde->last_active = post_poll;
-            D("%s got events %x", dump_fde(fde).c_str(), events);
-            fde->state |= FDE_PENDING;
-            ctx->pending_list_.push_back(fde);
-        }
-    }
-}
-
-template <class T>
-struct always_false : std::false_type {};
-
-static void fdevent_call_fdfunc(fdevent* fde) {
-    unsigned events = fde->events;
-    fde->events = 0;
-    CHECK(fde->state & FDE_PENDING);
-    fde->state &= (~FDE_PENDING);
-    D("fdevent_call_fdfunc %s", dump_fde(fde).c_str());
-    std::visit(
-            [&](auto&& f) {
-                using F = std::decay_t<decltype(f)>;
-                if constexpr (std::is_same_v<fd_func, F>) {
-                    f(fde->fd.get(), events, fde->arg);
-                } else if constexpr (std::is_same_v<fd_func2, F>) {
-                    f(fde, events, fde->arg);
-                } else {
-                    static_assert(always_false<F>::value, "non-exhaustive visitor");
-                }
-            },
-            fde->func);
-}
-
-static void fdevent_check_spin(fdevent_context_poll* ctx, uint64_t cycle) {
-    // Check to see if we're spinning because we forgot about an fdevent
-    // by keeping track of how long fdevents have been continuously pending.
-    struct SpinCheck {
-        fdevent* fde;
-        android::base::boot_clock::time_point timestamp;
-        uint64_t cycle;
-    };
-
-    // TODO: Move this into the base fdevent_context.
-    static auto& g_continuously_pending = *new std::unordered_map<uint64_t, SpinCheck>();
-    static auto last_cycle = android::base::boot_clock::now();
-
-    auto now = android::base::boot_clock::now();
-    if (now - last_cycle > 10ms) {
-        // We're not spinning.
-        g_continuously_pending.clear();
-        last_cycle = now;
-        return;
-    }
-    last_cycle = now;
-
-    for (auto* fde : ctx->pending_list_) {
-        auto it = g_continuously_pending.find(fde->id);
-        if (it == g_continuously_pending.end()) {
-            g_continuously_pending[fde->id] =
-                    SpinCheck{.fde = fde, .timestamp = now, .cycle = cycle};
-        } else {
-            it->second.cycle = cycle;
-        }
-    }
-
-    for (auto it = g_continuously_pending.begin(); it != g_continuously_pending.end();) {
-        if (it->second.cycle != cycle) {
-            it = g_continuously_pending.erase(it);
-        } else {
-            // Use an absurdly long window, since all we really care about is
-            // getting a bugreport eventually.
-            if (now - it->second.timestamp > 300s) {
-                LOG(FATAL_WITHOUT_ABORT)
-                        << "detected spin in fdevent: " << dump_fde(it->second.fde);
-#if defined(__linux__)
-                int fd = it->second.fde->fd.get();
-                std::string fd_path = android::base::StringPrintf("/proc/self/fd/%d", fd);
-                std::string path;
-                if (!android::base::Readlink(fd_path, &path)) {
-                    PLOG(FATAL_WITHOUT_ABORT) << "readlink of fd " << fd << " failed";
-                }
-                LOG(FATAL_WITHOUT_ABORT) << "fd " << fd << " = " << path;
-#endif
-                abort();
-            }
-            ++it;
-        }
-    }
-}
-
 void fdevent_context_poll::Loop() {
     main_thread_id_ = android::base::GetThreadId();
 
-    uint64_t cycle = 0;
     while (true) {
         if (terminate_loop_) {
             break;
         }
 
         D("--- --- waiting for events");
+        std::vector<adb_pollfd> pollfds;
+        for (const auto& [fd, fde] : this->installed_fdevents_) {
+            adb_pollfd pfd;
+            pfd.fd = fd;
+            pfd.events = 0;
+            if (fde->state & FDE_READ) {
+                pfd.events |= POLLIN;
+            }
+            if (fde->state & FDE_WRITE) {
+                pfd.events |= POLLOUT;
+            }
+            if (fde->state & FDE_ERROR) {
+                pfd.events |= POLLERR;
+            }
+#if defined(__linux__)
+            pfd.events |= POLLRDHUP;
+#endif
+            pfd.revents = 0;
+            pollfds.push_back(pfd);
+        }
+        CHECK_GT(pollfds.size(), 0u);
+        D("poll(), pollfds = %s", dump_pollfds(pollfds).c_str());
 
-        fdevent_process(this);
-
-        fdevent_check_spin(this, cycle++);
-
-        while (!pending_list_.empty()) {
-            fdevent* fde = pending_list_.front();
-            pending_list_.pop_front();
-            fdevent_call_fdfunc(fde);
+        std::optional<std::chrono::milliseconds> timeout = CalculatePollDuration();
+        int timeout_ms;
+        if (!timeout) {
+            timeout_ms = -1;
+        } else {
+            timeout_ms = timeout->count();
         }
 
-        this->FlushRunQueue();
+        int ret = adb_poll(pollfds.data(), pollfds.size(), timeout_ms);
+        if (ret == -1) {
+            PLOG(ERROR) << "poll(), ret = " << ret;
+            return;
+        }
+
+        auto post_poll = std::chrono::steady_clock::now();
+        std::vector<fdevent_event> poll_events;
+
+        for (const auto& pollfd : pollfds) {
+            unsigned events = 0;
+            if (pollfd.revents & POLLIN) {
+                events |= FDE_READ;
+            }
+            if (pollfd.revents & POLLOUT) {
+                events |= FDE_WRITE;
+            }
+            if (pollfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
+                // We fake a read, as the rest of the code assumes that errors will
+                // be detected at that point.
+                events |= FDE_READ | FDE_ERROR;
+            }
+#if defined(__linux__)
+            if (pollfd.revents & POLLRDHUP) {
+                events |= FDE_READ | FDE_ERROR;
+            }
+#endif
+
+            auto it = this->installed_fdevents_.find(pollfd.fd);
+            CHECK(it != this->installed_fdevents_.end());
+            fdevent* fde = it->second;
+
+            if (events == 0) {
+                if (fde->timeout) {
+                    auto deadline = fde->last_active + *fde->timeout;
+                    if (deadline < post_poll) {
+                        events |= FDE_TIMEOUT;
+                    }
+                }
+            }
+
+            if (events != 0) {
+                D("%s got events %x", dump_fde(fde).c_str(), events);
+                poll_events.push_back({fde, events});
+                fde->last_active = post_poll;
+            }
+        }
+        this->HandleEvents(std::move(poll_events));
     }
 
     main_thread_id_.reset();
@@ -351,7 +195,7 @@
 
 size_t fdevent_context_poll::InstalledCount() {
     // We always have an installed fde for interrupt.
-    return poll_node_map_.size() - 1;
+    return this->installed_fdevents_.size() - 1;
 }
 
 void fdevent_context_poll::Interrupt() {
diff --git a/adb/fdevent/fdevent_poll.h b/adb/fdevent/fdevent_poll.h
index db08301..98abab2 100644
--- a/adb/fdevent/fdevent_poll.h
+++ b/adb/fdevent/fdevent_poll.h
@@ -44,13 +44,10 @@
   }
 };
 
-struct fdevent_context_poll : public fdevent_context {
+struct fdevent_context_poll final : public fdevent_context {
     fdevent_context_poll();
     virtual ~fdevent_context_poll();
 
-    virtual void Register(fdevent* fde) final;
-    virtual void Unregister(fdevent* fde) final;
-
     virtual void Set(fdevent* fde, unsigned events) final;
 
     virtual void Loop() final;
@@ -61,11 +58,6 @@
     virtual void Interrupt() final;
 
   public:
-    // All operations to fdevent should happen only in the main thread.
-    // That's why we don't need a lock for fdevent.
-    std::unordered_map<int, PollNode> poll_node_map_;
-    std::list<fdevent*> pending_list_;
-
     unique_fd interrupt_fd_;
     fdevent* interrupt_fde_ = nullptr;
 };
diff --git a/adb/fdevent/fdevent_test.cpp b/adb/fdevent/fdevent_test.cpp
index 682f061..e06b3b3 100644
--- a/adb/fdevent/fdevent_test.cpp
+++ b/adb/fdevent/fdevent_test.cpp
@@ -118,8 +118,8 @@
 TEST_F(FdeventTest, smoke) {
     for (bool use_new_callback : {true, false}) {
         fdevent_reset();
-        const size_t PIPE_COUNT = 10;
-        const size_t MESSAGE_LOOP_COUNT = 100;
+        const size_t PIPE_COUNT = 512;
+        const size_t MESSAGE_LOOP_COUNT = 10;
         const std::string MESSAGE = "fdevent_test";
         int fd_pair1[2];
         int fd_pair2[2];
@@ -172,44 +172,6 @@
     }
 }
 
-struct InvalidFdArg {
-    fdevent* fde;
-    unsigned expected_events;
-    size_t* happened_event_count;
-};
-
-static void InvalidFdEventCallback(int, unsigned events, void* userdata) {
-    InvalidFdArg* arg = reinterpret_cast<InvalidFdArg*>(userdata);
-    ASSERT_EQ(arg->expected_events, events);
-    fdevent_destroy(arg->fde);
-    if (++*(arg->happened_event_count) == 2) {
-        fdevent_terminate_loop();
-    }
-}
-
-static void InvalidFdThreadFunc() {
-    const int INVALID_READ_FD = std::numeric_limits<int>::max() - 1;
-    size_t happened_event_count = 0;
-    InvalidFdArg read_arg;
-    read_arg.expected_events = FDE_READ | FDE_ERROR;
-    read_arg.happened_event_count = &happened_event_count;
-    read_arg.fde = fdevent_create(INVALID_READ_FD, InvalidFdEventCallback, &read_arg);
-    fdevent_add(read_arg.fde, FDE_READ);
-
-    const int INVALID_WRITE_FD = std::numeric_limits<int>::max();
-    InvalidFdArg write_arg;
-    write_arg.expected_events = FDE_READ | FDE_ERROR;
-    write_arg.happened_event_count = &happened_event_count;
-    write_arg.fde = fdevent_create(INVALID_WRITE_FD, InvalidFdEventCallback, &write_arg);
-    fdevent_add(write_arg.fde, FDE_WRITE);
-    fdevent_loop();
-}
-
-TEST_F(FdeventTest, invalid_fd) {
-    std::thread thread(InvalidFdThreadFunc);
-    thread.join();
-}
-
 TEST_F(FdeventTest, run_on_main_thread) {
     std::vector<int> vec;
 
diff --git a/adb/socket_spec.cpp b/adb/socket_spec.cpp
index 98468b5..9ce443e 100644
--- a/adb/socket_spec.cpp
+++ b/adb/socket_spec.cpp
@@ -16,6 +16,7 @@
 
 #include "socket_spec.h"
 
+#include <limits>
 #include <string>
 #include <string_view>
 #include <unordered_map>
@@ -28,10 +29,12 @@
 #include <cutils/sockets.h>
 
 #include "adb.h"
+#include "adb_utils.h"
 #include "sysdeps.h"
 
 using namespace std::string_literals;
 
+using android::base::ConsumePrefix;
 using android::base::StringPrintf;
 
 #if defined(__linux__)
@@ -131,7 +134,7 @@
             return true;
         }
     }
-    return spec.starts_with("tcp:");
+    return spec.starts_with("tcp:") || spec.starts_with("acceptfd:");
 }
 
 bool is_local_socket_spec(std::string_view spec) {
@@ -235,6 +238,9 @@
         *error = "vsock is only supported on linux";
         return false;
 #endif  // ADB_LINUX
+    } else if (address.starts_with("acceptfd:")) {
+        *error = "cannot connect to acceptfd";
+        return false;
     }
 
     for (const auto& it : kLocalSocketTypes) {
@@ -272,7 +278,9 @@
         if (hostname.empty() && gListenAll) {
             result = network_inaddr_any_server(port, SOCK_STREAM, error);
         } else if (tcp_host_is_local(hostname)) {
-            result = network_loopback_server(port, SOCK_STREAM, error);
+            result = network_loopback_server(port, SOCK_STREAM, error, true);
+        } else if (hostname == "::1") {
+            result = network_loopback_server(port, SOCK_STREAM, error, false);
         } else {
             // TODO: Implement me.
             *error = "listening on specified hostname currently unsupported";
@@ -332,6 +340,46 @@
         *error = "vsock is only supported on linux";
         return -1;
 #endif  // ADB_LINUX
+    } else if (ConsumePrefix(&spec, "acceptfd:")) {
+#if ADB_WINDOWS
+        *error = "socket activation not supported under Windows";
+        return -1;
+#else
+        // We inherited the socket from some kind of launcher. It's already bound and
+        // listening. Return a copy of the FD instead of the FD itself so we implement the
+        // normal "listen" contract and can succeed more than once.
+        unsigned int fd_u;
+        if (!ParseUint(&fd_u, spec) || fd_u > std::numeric_limits<int>::max()) {
+            *error = "invalid fd";
+            return -1;
+        }
+        int fd = static_cast<int>(fd_u);
+        int flags = get_fd_flags(fd);
+        if (flags < 0) {
+            *error = android::base::StringPrintf("could not get flags of inherited fd %d: '%s'", fd,
+                                                 strerror(errno));
+            return -1;
+        }
+        if (flags & FD_CLOEXEC) {
+            *error = android::base::StringPrintf("fd %d was not inherited from parent", fd);
+            return -1;
+        }
+
+        int dummy_sock_type;
+        socklen_t dummy_sock_type_size = sizeof(dummy_sock_type);
+        if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &dummy_sock_type, &dummy_sock_type_size)) {
+            *error = android::base::StringPrintf("fd %d does not refer to a socket", fd);
+            return -1;
+        }
+
+        int new_fd = fcntl(fd, F_DUPFD_CLOEXEC, 0);
+        if (new_fd < 0) {
+            *error = android::base::StringPrintf("could not dup inherited fd %d: '%s'", fd,
+                                                 strerror(errno));
+            return -1;
+        }
+        return new_fd;
+#endif
     }
 
     for (const auto& it : kLocalSocketTypes) {
diff --git a/adb/sockets.cpp b/adb/sockets.cpp
index 75993b3..7d5bf17 100644
--- a/adb/sockets.cpp
+++ b/adb/sockets.cpp
@@ -125,8 +125,7 @@
         if (rc > 0 && static_cast<size_t>(rc) == s->packet_queue.size()) {
             s->packet_queue.clear();
         } else if (rc > 0) {
-            // TODO: Implement a faster drop_front?
-            s->packet_queue.take_front(rc);
+            s->packet_queue.drop_front(rc);
             fdevent_add(s->fde, FDE_WRITE);
             return SocketFlushResult::TryAgain;
         } else if (rc == -1 && errno == EAGAIN) {
@@ -757,6 +756,8 @@
 
 #if ADB_HOST
     service = std::string_view(s->smart_socket_data).substr(4);
+
+    // TODO: These should be handled in handle_host_request.
     if (android::base::ConsumePrefix(&service, "host-serial:")) {
         // serial number should follow "host:" and could be a host:port string.
         if (!internal::parse_host_service(&serial, &service, service)) {
diff --git a/adb/sysdeps.h b/adb/sysdeps.h
index b0e7fa0..0c5a6b4 100644
--- a/adb/sysdeps.h
+++ b/adb/sysdeps.h
@@ -33,6 +33,7 @@
 // Include this before open/close/unlink are defined as macros below.
 #include <android-base/errors.h>
 #include <android-base/macros.h>
+#include <android-base/off64_t.h>
 #include <android-base/unique_fd.h>
 #include <android-base/utf8.h>
 
@@ -91,11 +92,14 @@
 extern int adb_open(const char* path, int options);
 extern int adb_creat(const char* path, int mode);
 extern int adb_read(borrowed_fd fd, void* buf, int len);
+extern int adb_pread(borrowed_fd fd, void* buf, int len, off64_t offset);
 extern int adb_write(borrowed_fd fd, const void* buf, int len);
+extern int adb_pwrite(borrowed_fd fd, const void* buf, int len, off64_t offset);
 extern int64_t adb_lseek(borrowed_fd fd, int64_t pos, int where);
 extern int adb_shutdown(borrowed_fd fd, int direction = SHUT_RDWR);
 extern int adb_close(int fd);
 extern int adb_register_socket(SOCKET s);
+extern HANDLE adb_get_os_handle(borrowed_fd fd);
 
 // See the comments for the !defined(_WIN32) version of unix_close().
 static __inline__ int unix_close(int fd) {
@@ -115,6 +119,9 @@
 #undef   read
 #define  read  ___xxx_read
 
+#undef pread
+#define pread ___xxx_pread
+
 // See the comments for the !defined(_WIN32) version of unix_write().
 static __inline__ int unix_write(borrowed_fd fd, const void* buf, size_t len) {
     return write(fd.get(), buf, len);
@@ -122,6 +129,9 @@
 #undef   write
 #define  write  ___xxx_write
 
+#undef pwrite
+#define pwrite ___xxx_pwrite
+
 // See the comments for the !defined(_WIN32) version of unix_lseek().
 static __inline__ int unix_lseek(borrowed_fd fd, int pos, int where) {
     return lseek(fd.get(), pos, where);
@@ -339,8 +349,15 @@
     return c == '/';
 }
 
+static __inline__ int get_fd_flags(borrowed_fd fd) {
+    return fcntl(fd.get(), F_GETFD);
+}
+
 static __inline__ void close_on_exec(borrowed_fd fd) {
-    fcntl(fd.get(), F_SETFD, FD_CLOEXEC);
+    int flags = get_fd_flags(fd);
+    if (flags >= 0 && (flags & FD_CLOEXEC) == 0) {
+        fcntl(fd.get(), F_SETFD, flags | FD_CLOEXEC);
+    }
 }
 
 // Open a file and return a file descriptor that may be used with unix_read(),
@@ -415,6 +432,14 @@
     return TEMP_FAILURE_RETRY(read(fd.get(), buf, len));
 }
 
+static __inline__ int adb_pread(int fd, void* buf, size_t len, off64_t offset) {
+#if defined(__APPLE__)
+    return TEMP_FAILURE_RETRY(pread(fd, buf, len, offset));
+#else
+    return TEMP_FAILURE_RETRY(pread64(fd, buf, len, offset));
+#endif
+}
+
 // Like unix_read(), but does not handle EINTR.
 static __inline__ int unix_read_interruptible(borrowed_fd fd, void* buf, size_t len) {
     return read(fd.get(), buf, len);
@@ -422,12 +447,25 @@
 
 #undef read
 #define read ___xxx_read
+#undef pread
+#define pread ___xxx_pread
 
 static __inline__ int adb_write(borrowed_fd fd, const void* buf, size_t len) {
     return TEMP_FAILURE_RETRY(write(fd.get(), buf, len));
 }
+
+static __inline__ int adb_pwrite(int fd, const void* buf, size_t len, off64_t offset) {
+#if defined(__APPLE__)
+    return TEMP_FAILURE_RETRY(pwrite(fd, buf, len, offset));
+#else
+    return TEMP_FAILURE_RETRY(pwrite64(fd, buf, len, offset));
+#endif
+}
+
 #undef   write
 #define  write  ___xxx_write
+#undef pwrite
+#define pwrite ___xxx_pwrite
 
 static __inline__ int64_t adb_lseek(borrowed_fd fd, int64_t pos, int where) {
 #if defined(__APPLE__)
@@ -570,6 +608,10 @@
     return path[0] == '/';
 }
 
+static __inline__ int adb_get_os_handle(borrowed_fd fd) {
+    return fd.get();
+}
+
 #endif /* !_WIN32 */
 
 static inline void disable_tcp_nagle(borrowed_fd fd) {
diff --git a/adb/sysdeps/network.h b/adb/sysdeps/network.h
index 83ce371..fadd155 100644
--- a/adb/sysdeps/network.h
+++ b/adb/sysdeps/network.h
@@ -19,4 +19,4 @@
 #include <string>
 
 int network_loopback_client(int port, int type, std::string* error);
-int network_loopback_server(int port, int type, std::string* error);
+int network_loopback_server(int port, int type, std::string* error, bool prefer_ipv4);
diff --git a/adb/sysdeps/posix/network.cpp b/adb/sysdeps/posix/network.cpp
index c5c2275..a4d9013 100644
--- a/adb/sysdeps/posix/network.cpp
+++ b/adb/sysdeps/posix/network.cpp
@@ -119,12 +119,15 @@
     return s.release();
 }
 
-int network_loopback_server(int port, int type, std::string* error) {
-    int rc = _network_loopback_server(false, port, type, error);
+int network_loopback_server(int port, int type, std::string* error, bool prefer_ipv4) {
+    int rc = -1;
+    if (prefer_ipv4) {
+        rc = _network_loopback_server(false, port, type, error);
+    }
 
-    // Only attempt to listen on IPv6 if IPv4 is unavailable.
+    // Only attempt to listen on IPv6 if IPv4 is unavailable or prefer_ipv4 is false
     // We don't want to start an IPv6 server if there's already an IPv4 one running.
-    if (rc == -1 && (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT)) {
+    if (rc == -1 && (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT || !prefer_ipv4)) {
         return _network_loopback_server(true, port, type, error);
     }
     return rc;
diff --git a/adb/sysdeps_win32.cpp b/adb/sysdeps_win32.cpp
index 6372b3d..d9cc36f 100644
--- a/adb/sysdeps_win32.cpp
+++ b/adb/sysdeps_win32.cpp
@@ -60,6 +60,7 @@
     int (*_fh_read)(FH, void*, int);
     int (*_fh_write)(FH, const void*, int);
     int (*_fh_writev)(FH, const adb_iovec*, int);
+    intptr_t (*_fh_get_os_handle)(FH);
 } FHClassRec;
 
 static void _fh_file_init(FH);
@@ -68,14 +69,11 @@
 static int _fh_file_read(FH, void*, int);
 static int _fh_file_write(FH, const void*, int);
 static int _fh_file_writev(FH, const adb_iovec*, int);
+static intptr_t _fh_file_get_os_handle(FH f);
 
 static const FHClassRec _fh_file_class = {
-    _fh_file_init,
-    _fh_file_close,
-    _fh_file_lseek,
-    _fh_file_read,
-    _fh_file_write,
-    _fh_file_writev,
+        _fh_file_init,  _fh_file_close,  _fh_file_lseek,         _fh_file_read,
+        _fh_file_write, _fh_file_writev, _fh_file_get_os_handle,
 };
 
 static void _fh_socket_init(FH);
@@ -84,14 +82,11 @@
 static int _fh_socket_read(FH, void*, int);
 static int _fh_socket_write(FH, const void*, int);
 static int _fh_socket_writev(FH, const adb_iovec*, int);
+static intptr_t _fh_socket_get_os_handle(FH f);
 
 static const FHClassRec _fh_socket_class = {
-    _fh_socket_init,
-    _fh_socket_close,
-    _fh_socket_lseek,
-    _fh_socket_read,
-    _fh_socket_write,
-    _fh_socket_writev,
+        _fh_socket_init,  _fh_socket_close,  _fh_socket_lseek,         _fh_socket_read,
+        _fh_socket_write, _fh_socket_writev, _fh_socket_get_os_handle,
 };
 
 #if defined(assert)
@@ -331,6 +326,10 @@
     return li.QuadPart;
 }
 
+static intptr_t _fh_file_get_os_handle(FH f) {
+    return reinterpret_cast<intptr_t>(f->u.handle);
+}
+
 /**************************************************************************/
 /**************************************************************************/
 /*****                                                                *****/
@@ -456,6 +455,26 @@
     return f->clazz->_fh_read(f, buf, len);
 }
 
+int adb_pread(borrowed_fd fd, void* buf, int len, off64_t offset) {
+    OVERLAPPED overlapped = {};
+    overlapped.Offset = static_cast<DWORD>(offset);
+    overlapped.OffsetHigh = static_cast<DWORD>(offset >> 32);
+    DWORD bytes_read;
+    if (!::ReadFile(adb_get_os_handle(fd), buf, static_cast<DWORD>(len), &bytes_read,
+                    &overlapped)) {
+        D("adb_pread: could not read %d bytes from FD %d", len, fd.get());
+        switch (::GetLastError()) {
+            case ERROR_IO_PENDING:
+                errno = EAGAIN;
+                return -1;
+            default:
+                errno = EINVAL;
+                return -1;
+        }
+    }
+    return static_cast<int>(bytes_read);
+}
+
 int adb_write(borrowed_fd fd, const void* buf, int len) {
     FH f = _fh_from_int(fd, __func__);
 
@@ -478,6 +497,25 @@
     return f->clazz->_fh_writev(f, iov, iovcnt);
 }
 
+int adb_pwrite(borrowed_fd fd, const void* buf, int len, off64_t offset) {
+    OVERLAPPED params = {};
+    params.Offset = static_cast<DWORD>(offset);
+    params.OffsetHigh = static_cast<DWORD>(offset >> 32);
+    DWORD bytes_written = 0;
+    if (!::WriteFile(adb_get_os_handle(fd), buf, len, &bytes_written, &params)) {
+        D("adb_pwrite: could not write %d bytes to FD %d", len, fd.get());
+        switch (::GetLastError()) {
+            case ERROR_IO_PENDING:
+                errno = EAGAIN;
+                return -1;
+            default:
+                errno = EINVAL;
+                return -1;
+        }
+    }
+    return static_cast<int>(bytes_written);
+}
+
 int64_t adb_lseek(borrowed_fd fd, int64_t pos, int where) {
     FH f = _fh_from_int(fd, __func__);
     if (!f) {
@@ -500,6 +538,20 @@
     return 0;
 }
 
+HANDLE adb_get_os_handle(borrowed_fd fd) {
+    FH f = _fh_from_int(fd, __func__);
+
+    if (!f) {
+        errno = EBADF;
+        return nullptr;
+    }
+
+    D("adb_get_os_handle: %s", f->name);
+    const intptr_t intptr_handle = f->clazz->_fh_get_os_handle(f);
+    const HANDLE handle = reinterpret_cast<const HANDLE>(intptr_handle);
+    return handle;
+}
+
 /**************************************************************************/
 /**************************************************************************/
 /*****                                                                *****/
@@ -688,12 +740,16 @@
               android::base::SystemErrorCodeToString(err).c_str());
         }
         _socket_set_errno(err);
-        result = -1;
+        return -1;
     }
     CHECK_GE(static_cast<DWORD>(std::numeric_limits<int>::max()), bytes_written);
     return static_cast<int>(bytes_written);
 }
 
+static intptr_t _fh_socket_get_os_handle(FH f) {
+    return f->u.socket;
+}
+
 /**************************************************************************/
 /**************************************************************************/
 /*****                                                                *****/
@@ -864,7 +920,8 @@
     return fd;
 }
 
-int network_loopback_server(int port, int type, std::string* error) {
+int network_loopback_server(int port, int type, std::string* error, bool prefer_ipv4) {
+    // TODO implement IPv6 support on windows
     return _network_server(port, type, INADDR_LOOPBACK, error);
 }
 
@@ -1076,7 +1133,7 @@
     int local_port = -1;
     std::string error;
 
-    server = network_loopback_server(0, SOCK_STREAM, &error);
+    server = network_loopback_server(0, SOCK_STREAM, &error, true);
     if (server < 0) {
         D("adb_socketpair: failed to create server: %s", error.c_str());
         goto fail;
diff --git a/adb/test_adb.py b/adb/test_adb.py
index 8272722..3d6de26 100755
--- a/adb/test_adb.py
+++ b/adb/test_adb.py
@@ -281,6 +281,37 @@
             subprocess.check_output(["adb", "-P", str(port), "kill-server"],
                                     stderr=subprocess.STDOUT)
 
+    @unittest.skipUnless(
+        os.name == "posix",
+        "adb doesn't yet support IPv6 on Windows",
+    )
+    def test_starts_on_ipv6_localhost(self):
+        """
+        Tests that the server can start up on ::1 and that it's accessible
+        """
+        server_port = 5037
+        # Kill any existing server on this non-default port.
+        subprocess.check_output(
+            ["adb", "-P", str(server_port), "kill-server"],
+            stderr=subprocess.STDOUT,
+        )
+        try:
+            subprocess.check_output(
+                ["adb", "-L", "tcp:[::1]:{}".format(server_port), "server"],
+                stderr=subprocess.STDOUT,
+            )
+            with fake_adbd() as (port, _):
+                with adb_connect(self, serial="localhost:{}".format(port)):
+                    pass
+        finally:
+            # If we started a server, kill it.
+            subprocess.check_output(
+                ["adb", "-P", str(server_port), "kill-server"],
+                stderr=subprocess.STDOUT,
+            )
+
+
+
 
 class EmulatorTest(unittest.TestCase):
     """Tests for the emulator connection."""
diff --git a/adb/test_device.py b/adb/test_device.py
index f95a5b3..57925e8 100755
--- a/adb/test_device.py
+++ b/adb/test_device.py
@@ -139,6 +139,25 @@
         msg = self.device.forward_list()
         self.assertEqual('', msg.strip())
 
+    def test_forward_old_protocol(self):
+        serialno = subprocess.check_output(self.device.adb_cmd + ['get-serialno']).strip()
+
+        msg = self.device.forward_list()
+        self.assertEqual('', msg.strip(),
+                         'Forwarding list must be empty to run this test.')
+
+        s = socket.create_connection(("localhost", 5037))
+        service = b"host-serial:%s:forward:tcp:5566;tcp:6655" % serialno
+        cmd = b"%04x%s" % (len(service), service)
+        s.sendall(cmd)
+
+        msg = self.device.forward_list()
+        self.assertTrue(re.search(r'tcp:5566.+tcp:6655', msg))
+
+        self.device.forward_remove_all()
+        msg = self.device.forward_list()
+        self.assertEqual('', msg.strip())
+
     def test_forward_tcp_port_0(self):
         self.assertEqual('', self.device.forward_list().strip(),
                          'Forwarding list must be empty to run this test.')
@@ -884,6 +903,20 @@
             remote_path += '/filename'
             self.device.push(local=tmp_file.name, remote=remote_path)
 
+    def disabled_test_push_multiple_slash_root(self):
+        """Regression test for pushing to //data/local/tmp.
+
+        Bug: http://b/141311284
+
+        Disabled because this broken on the adbd side as well: b/141943968
+        """
+        with tempfile.NamedTemporaryFile() as tmp_file:
+            tmp_file.write('\0' * 1024 * 1024)
+            tmp_file.flush()
+            remote_path = '/' + self.DEVICE_TEMP_DIR + '/test_push_multiple_slash_root'
+            self.device.shell(['rm', '-rf', remote_path])
+            self.device.push(local=tmp_file.name, remote=remote_path)
+
     def _test_pull(self, remote_file, checksum):
         tmp_write = tempfile.NamedTemporaryFile(mode='wb', delete=False)
         tmp_write.close()
diff --git a/libmeminfo/libdmabufinfo/tools/Android.bp b/adb/tools/Android.bp
similarity index 67%
copy from libmeminfo/libdmabufinfo/tools/Android.bp
copy to adb/tools/Android.bp
index 224b68e..71e32b7 100644
--- a/libmeminfo/libdmabufinfo/tools/Android.bp
+++ b/adb/tools/Android.bp
@@ -1,4 +1,4 @@
-// Copyright (C) 2019 The Android Open Source Project
+// Copyright (C) 2017 The Android Open Source Project
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -12,19 +12,25 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-cc_binary {
-    name: "dmabuf_dump",
-    cflags: [
-        "-Wall",
-        "-Werror",
+cc_binary_host {
+    name: "check_ms_os_desc",
+
+    defaults: ["adb_defaults"],
+
+    srcs: [
+        "check_ms_os_desc.cpp",
     ],
 
-    srcs: ["dmabuf_dump.cpp"],
-    shared_libs: [
-        "libbase",
-    ],
     static_libs: [
-        "libdmabufinfo",
+        "libbase",
+        "libusb",
     ],
-    product_specific: true,
-}
\ No newline at end of file
+
+    stl: "libc++_static",
+
+    dist: {
+        targets: [
+            "sdk",
+        ],
+    },
+}
diff --git a/adb/tools/check_ms_os_desc.cpp b/adb/tools/check_ms_os_desc.cpp
new file mode 100644
index 0000000..8743ff7
--- /dev/null
+++ b/adb/tools/check_ms_os_desc.cpp
@@ -0,0 +1,266 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <err.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <optional>
+#include <string>
+#include <vector>
+
+#include <libusb/libusb.h>
+
+static bool is_adb_device(libusb_device* device) {
+    libusb_device_descriptor device_desc;
+    libusb_get_device_descriptor(device, &device_desc);
+    if (device_desc.bDeviceClass != 0) {
+        return false;
+    }
+
+    libusb_config_descriptor* config_desc;
+    int rc = libusb_get_active_config_descriptor(device, &config_desc);
+    if (rc != 0) {
+        fprintf(stderr, "failed to get config descriptor for device %u:%u: %s\n",
+                libusb_get_bus_number(device), libusb_get_port_number(device),
+                libusb_error_name(rc));
+        return false;
+    }
+
+    for (size_t i = 0; i < config_desc->bNumInterfaces; ++i) {
+        const libusb_interface* interface = &config_desc->interface[i];
+        for (int j = 0; j < interface->num_altsetting; ++j) {
+            const libusb_interface_descriptor* interface_descriptor = &interface->altsetting[j];
+            if (interface_descriptor->bInterfaceClass == 0xff &&
+                interface_descriptor->bInterfaceSubClass == 0x42 &&
+                interface_descriptor->bInterfaceProtocol == 1) {
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
+static std::optional<std::vector<uint8_t>> get_descriptor(libusb_device_handle* handle,
+                                                          uint8_t type, uint8_t index,
+                                                          uint16_t length) {
+    std::vector<uint8_t> result;
+    result.resize(length);
+    int rc = libusb_get_descriptor(handle, type, index, result.data(), result.size());
+    if (rc < 0) {
+        fprintf(stderr, "libusb_get_descriptor failed: %s\n", libusb_error_name(rc));
+        return std::nullopt;
+    }
+    result.resize(rc);
+    return result;
+}
+
+static std::optional<std::string> get_string_descriptor(libusb_device_handle* handle,
+                                                        uint8_t index) {
+    std::string result;
+    result.resize(4096);
+    int rc = libusb_get_string_descriptor_ascii(
+            handle, index, reinterpret_cast<uint8_t*>(result.data()), result.size());
+    if (rc < 0) {
+        fprintf(stderr, "libusb_get_string_descriptor_ascii failed: %s\n", libusb_error_name(rc));
+        return std::nullopt;
+    }
+    result.resize(rc);
+    return result;
+}
+
+static void check_ms_os_desc_v1(libusb_device_handle* device_handle, const std::string& serial) {
+    auto os_desc = get_descriptor(device_handle, 0x03, 0xEE, 0x12);
+    if (!os_desc) {
+        errx(1, "failed to retrieve MS OS descriptor");
+    }
+
+    if (os_desc->size() != 0x12) {
+        errx(1, "os descriptor size mismatch");
+    }
+
+    if (memcmp(os_desc->data() + 2, u"MSFT100\0", 14) != 0) {
+        errx(1, "os descriptor signature mismatch");
+    }
+
+    uint8_t vendor_code = (*os_desc)[16];
+    uint8_t pad = (*os_desc)[17];
+
+    if (pad != 0) {
+        errx(1, "os descriptor padding non-zero");
+    }
+
+    std::vector<uint8_t> data;
+    data.resize(0x10);
+    int rc = libusb_control_transfer(device_handle, 0xC0, vendor_code, 0x00, 0x04, data.data(),
+                                     data.size(), 0);
+    if (rc != 0x10) {
+        errx(1, "failed to retrieve MS OS v1 compat descriptor header: %s", libusb_error_name(rc));
+    }
+
+    struct __attribute__((packed)) ms_os_desc_v1_header {
+        uint32_t dwLength;
+        uint16_t bcdVersion;
+        uint16_t wIndex;
+        uint8_t bCount;
+        uint8_t reserved[7];
+    };
+    static_assert(sizeof(ms_os_desc_v1_header) == 0x10);
+
+    ms_os_desc_v1_header hdr;
+    memcpy(&hdr, data.data(), data.size());
+
+    data.resize(hdr.dwLength);
+    rc = libusb_control_transfer(device_handle, 0xC0, vendor_code, 0x00, 0x04, data.data(),
+                                 data.size(), 0);
+    if (static_cast<size_t>(rc) != data.size()) {
+        errx(1, "failed to retrieve MS OS v1 compat descriptor: %s", libusb_error_name(rc));
+    }
+
+    memcpy(&hdr, data.data(), data.size());
+
+    struct __attribute__((packed)) ms_os_desc_v1_function {
+        uint8_t bFirstInterfaceNumber;
+        uint8_t reserved1;
+        uint8_t compatibleID[8];
+        uint8_t subCompatibleID[8];
+        uint8_t reserved2[6];
+    };
+
+    if (sizeof(ms_os_desc_v1_header) + hdr.bCount * sizeof(ms_os_desc_v1_function) != data.size()) {
+        errx(1, "MS OS v1 compat descriptor size mismatch");
+    }
+
+    for (int i = 0; i < hdr.bCount; ++i) {
+        ms_os_desc_v1_function function;
+        memcpy(&function,
+               data.data() + sizeof(ms_os_desc_v1_header) + i * sizeof(ms_os_desc_v1_function),
+               sizeof(function));
+        if (memcmp("WINUSB\0\0", function.compatibleID, 8) == 0) {
+            return;
+        }
+    }
+
+    errx(1, "failed to find v1 MS OS descriptor specifying WinUSB for device %s", serial.c_str());
+}
+
+static void check_ms_os_desc_v2(libusb_device_handle* device_handle, const std::string& serial) {
+    libusb_bos_descriptor* bos;
+    int rc = libusb_get_bos_descriptor(device_handle, &bos);
+
+    if (rc != 0) {
+        fprintf(stderr, "failed to get bos descriptor for device %s\n", serial.c_str());
+        return;
+    }
+
+    for (size_t i = 0; i < bos->bNumDeviceCaps; ++i) {
+        libusb_bos_dev_capability_descriptor* desc = bos->dev_capability[i];
+        if (desc->bDescriptorType != LIBUSB_DT_DEVICE_CAPABILITY) {
+            errx(1, "invalid BOS descriptor type: %d", desc->bDescriptorType);
+        }
+
+        if (desc->bDevCapabilityType != 0x05 /* PLATFORM */) {
+            fprintf(stderr, "skipping non-platform dev capability: %#02x\n",
+                    desc->bDevCapabilityType);
+            continue;
+        }
+
+        if (desc->bLength < sizeof(*desc) + 16) {
+            errx(1, "received device capability descriptor not long enough to contain a UUID?");
+        }
+
+        char uuid[16];
+        memcpy(uuid, desc->dev_capability_data, 16);
+
+        constexpr uint8_t ms_os_uuid[16] = {0xD8, 0xDD, 0x60, 0xDF, 0x45, 0x89, 0x4C, 0xC7,
+                                            0x9C, 0xD2, 0x65, 0x9D, 0x9E, 0x64, 0x8A, 0x9F};
+        if (memcmp(uuid, ms_os_uuid, 16) != 0) {
+            fprintf(stderr, "skipping unknown UUID\n");
+            continue;
+        }
+
+        size_t data_length = desc->bLength - sizeof(*desc) - 16;
+        fprintf(stderr, "found MS OS 2.0 descriptor, length = %zu\n", data_length);
+
+        // Linux does not appear to support MS OS 2.0 Descriptors.
+        // TODO: If and when it does, verify that we're emitting them properly.
+    }
+}
+
+int main(int argc, char** argv) {
+    libusb_context* ctx;
+    if (libusb_init(&ctx) != 0) {
+        errx(1, "failed to initialize libusb context");
+    }
+
+    libusb_device** device_list = nullptr;
+    ssize_t device_count = libusb_get_device_list(ctx, &device_list);
+    if (device_count < 0) {
+        errx(1, "libusb_get_device_list failed");
+    }
+
+    const char* expected_serial = getenv("ANDROID_SERIAL");
+    bool found = false;
+
+    for (ssize_t i = 0; i < device_count; ++i) {
+        libusb_device* device = device_list[i];
+        if (!is_adb_device(device)) {
+            continue;
+        }
+
+        libusb_device_handle* device_handle = nullptr;
+        int rc = libusb_open(device, &device_handle);
+        if (rc != 0) {
+            fprintf(stderr, "failed to open device %u:%u: %s\n", libusb_get_bus_number(device),
+                    libusb_get_port_number(device), libusb_error_name(rc));
+            continue;
+        }
+
+        libusb_device_descriptor device_desc;
+        libusb_get_device_descriptor(device, &device_desc);
+
+        std::optional<std::string> serial =
+                get_string_descriptor(device_handle, device_desc.iSerialNumber);
+        if (!serial) {
+            errx(1, "failed to get serial for device %u:%u", libusb_get_bus_number(device),
+                 libusb_get_port_number(device));
+        }
+
+        if (expected_serial && *serial != expected_serial) {
+            fprintf(stderr, "skipping %s (wanted %s)\n", serial->c_str(), expected_serial);
+            continue;
+        }
+
+        // Check for MS OS Descriptor v1.
+        // https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rdpeusb/c2f351f9-84d2-4a1b-9fe3-a6ca195f84d0
+        fprintf(stderr, "fetching v1 OS descriptor from device %s\n", serial->c_str());
+        check_ms_os_desc_v1(device_handle, *serial);
+        fprintf(stderr, "found v1 OS descriptor for device %s\n", serial->c_str());
+
+        // Read BOS for MS OS Descriptor 2.0 descriptors:
+        // http://download.microsoft.com/download/3/5/6/3563ED4A-F318-4B66-A181-AB1D8F6FD42D/MS_OS_2_0_desc.docx
+        fprintf(stderr, "fetching v2 OS descriptor from device %s\n", serial->c_str());
+        check_ms_os_desc_v2(device_handle, *serial);
+
+        found = true;
+    }
+
+    if (expected_serial && !found) {
+        errx(1, "failed to find device with serial %s", expected_serial);
+    }
+    return 0;
+}
diff --git a/adb/transport.cpp b/adb/transport.cpp
index bebd27c..9dd6ec6 100644
--- a/adb/transport.cpp
+++ b/adb/transport.cpp
@@ -55,7 +55,7 @@
 using android::base::ScopedLockAssertion;
 
 static void remove_transport(atransport* transport);
-static void transport_unref(atransport* transport);
+static void transport_destroy(atransport* transport);
 
 // TODO: unordered_map<TransportId, atransport*>
 static auto& transport_list = *new std::list<atransport*>();
@@ -74,6 +74,7 @@
 const char* const kFeatureAbb = "abb";
 const char* const kFeatureFixedPushSymlinkTimestamp = "fixed_push_symlink_timestamp";
 const char* const kFeatureAbbExec = "abb_exec";
+const char* const kFeatureRemountShell = "remount_shell";
 
 namespace {
 
@@ -676,7 +677,6 @@
     if (t->GetConnectionState() != kCsNoPerm) {
         // The connection gets a reference to the atransport. It will release it
         // upon a read/write error.
-        t->ref_count++;
         t->connection()->SetTransportName(t->serial_name());
         t->connection()->SetReadCallback([t](Connection*, std::unique_ptr<apacket> p) {
             if (!check_header(p.get(), t)) {
@@ -695,7 +695,7 @@
             LOG(INFO) << t->serial_name() << ": connection terminated: " << error;
             fdevent_run_on_main_thread([t]() {
                 handle_offline(t);
-                transport_unref(t);
+                transport_destroy(t);
             });
         });
 
@@ -771,36 +771,27 @@
     }
 }
 
-static void transport_unref(atransport* t) {
+static void transport_destroy(atransport* t) {
     check_main_thread();
     CHECK(t != nullptr);
 
     std::lock_guard<std::recursive_mutex> lock(transport_lock);
-    CHECK_GT(t->ref_count, 0u);
-    t->ref_count--;
-    if (t->ref_count == 0) {
-        LOG(INFO) << "destroying transport " << t->serial_name();
-        t->connection()->Stop();
+    LOG(INFO) << "destroying transport " << t->serial_name();
+    t->connection()->Stop();
 #if ADB_HOST
-        if (t->IsTcpDevice() && !t->kicked()) {
-            D("transport: %s unref (attempting reconnection)", t->serial.c_str());
+    if (t->IsTcpDevice() && !t->kicked()) {
+        D("transport: %s destroy (attempting reconnection)", t->serial.c_str());
 
-            // We need to clear the transport's keys, so that on the next connection, it tries
-            // again from the beginning.
-            t->ResetKeys();
-            reconnect_handler.TrackTransport(t);
-        } else {
-            D("transport: %s unref (kicking and closing)", t->serial.c_str());
-            remove_transport(t);
-        }
-#else
-        D("transport: %s unref (kicking and closing)", t->serial.c_str());
-        remove_transport(t);
+        // We need to clear the transport's keys, so that on the next connection, it tries
+        // again from the beginning.
+        t->ResetKeys();
+        reconnect_handler.TrackTransport(t);
+        return;
+    }
 #endif
 
-    } else {
-        D("transport: %s unref (count=%zu)", t->serial.c_str(), t->ref_count);
-    }
+    D("transport: %s destroy (kicking and closing)", t->serial.c_str());
+    remove_transport(t);
 }
 
 static int qual_match(const std::string& to_test, const char* prefix, const std::string& qual,
@@ -1051,6 +1042,7 @@
             kFeatureAbb,
             kFeatureFixedPushSymlinkTimestamp,
             kFeatureAbbExec,
+            kFeatureRemountShell,
             // Increment ADB_SERVER_VERSION when adding a feature that adbd needs
             // to know about. Otherwise, the client can be stuck running an old
             // version of the server even after upgrading their copy of adb.
diff --git a/adb/transport.h b/adb/transport.h
index c4a6841..ea77117 100644
--- a/adb/transport.h
+++ b/adb/transport.h
@@ -66,10 +66,13 @@
 extern const char* const kFeatureApex;
 // adbd has b/110953234 fixed.
 extern const char* const kFeatureFixedPushMkdir;
-// adbd supports android binder bridge (abb).
+// adbd supports android binder bridge (abb) in interactive mode using shell protocol.
 extern const char* const kFeatureAbb;
+// adbd supports abb using raw pipe.
+extern const char* const kFeatureAbbExec;
 // adbd properly updates symlink timestamps on push.
 extern const char* const kFeatureFixedPushSymlinkTimestamp;
+extern const char* const kFeatureRemountShell;
 
 TransportId NextTransportId();
 
@@ -264,7 +267,7 @@
     usb_handle* GetUsbHandle() { return usb_handle_; }
 
     const TransportId id;
-    size_t ref_count = 0;
+
     bool online = false;
     TransportType type = kTransportAny;
 
@@ -275,6 +278,12 @@
     std::string device;
     std::string devpath;
 
+#if !ADB_HOST
+    // Used to provide the key to the framework.
+    std::string auth_key;
+    uint64_t auth_id;
+#endif
+
     bool IsTcpDevice() const { return type == kTransportLocal; }
 
 #if ADB_HOST
diff --git a/adb/transport_fd.cpp b/adb/transport_fd.cpp
index a93e68a..8d2ad66 100644
--- a/adb/transport_fd.cpp
+++ b/adb/transport_fd.cpp
@@ -93,8 +93,8 @@
 
                 if (pfds[0].revents & POLLIN) {
                     // TODO: Should we be getting blocks from a free list?
-                    auto block = std::make_unique<IOVector::block_type>(MAX_PAYLOAD);
-                    rc = adb_read(fd_.get(), &(*block)[0], block->size());
+                    auto block = IOVector::block_type(MAX_PAYLOAD);
+                    rc = adb_read(fd_.get(), &block[0], block.size());
                     if (rc == -1) {
                         *error = std::string("read failed: ") + strerror(errno);
                         return;
@@ -102,7 +102,7 @@
                         *error = "read failed: EOF";
                         return;
                     }
-                    block->resize(rc);
+                    block.resize(rc);
                     read_buffer_.append(std::move(block));
 
                     if (!read_header_ && read_buffer_.size() >= sizeof(amessage)) {
@@ -116,7 +116,7 @@
                         auto data_chain = read_buffer_.take_front(read_header_->data_length);
 
                         // TODO: Make apacket carry around a IOVector instead of coalescing.
-                        auto payload = data_chain.coalesce<apacket::payload_type>();
+                        auto payload = std::move(data_chain).coalesce();
                         auto packet = std::make_unique<apacket>();
                         packet->msg = *read_header_;
                         packet->payload = std::move(payload);
@@ -184,8 +184,7 @@
             return WriteResult::Error;
         }
 
-        // TODO: Implement a more efficient drop_front?
-        write_buffer_.take_front(rc);
+        write_buffer_.drop_front(rc);
         writable_ = write_buffer_.empty();
         if (write_buffer_.empty()) {
             return WriteResult::Completed;
@@ -199,10 +198,10 @@
         std::lock_guard<std::mutex> lock(write_mutex_);
         const char* header_begin = reinterpret_cast<const char*>(&packet->msg);
         const char* header_end = header_begin + sizeof(packet->msg);
-        auto header_block = std::make_unique<IOVector::block_type>(header_begin, header_end);
+        auto header_block = IOVector::block_type(header_begin, header_end);
         write_buffer_.append(std::move(header_block));
         if (!packet->payload.empty()) {
-            write_buffer_.append(std::make_unique<IOVector::block_type>(std::move(packet->payload)));
+            write_buffer_.append(std::move(packet->payload));
         }
 
         WriteResult result = DispatchWrites();
diff --git a/adb/types.cpp b/adb/types.cpp
new file mode 100644
index 0000000..26b77ab
--- /dev/null
+++ b/adb/types.cpp
@@ -0,0 +1,204 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "types.h"
+
+IOVector& IOVector::operator=(IOVector&& move) noexcept {
+    chain_ = std::move(move.chain_);
+    chain_length_ = move.chain_length_;
+    begin_offset_ = move.begin_offset_;
+    start_index_ = move.start_index_;
+
+    move.clear();
+    return *this;
+}
+
+IOVector::block_type IOVector::clear() {
+    chain_length_ = 0;
+    begin_offset_ = 0;
+    start_index_ = 0;
+    block_type res;
+    if (!chain_.empty()) {
+        res = std::move(chain_.back());
+    }
+    chain_.clear();
+    return res;
+}
+
+void IOVector::drop_front(IOVector::size_type len) {
+    if (len == 0) {
+        return;
+    }
+    if (len == size()) {
+        clear();
+        return;
+    }
+    CHECK_LT(len, size());
+
+    auto dropped = 0u;
+    while (dropped < len) {
+        const auto next = chain_[start_index_].size() - begin_offset_;
+        if (dropped + next < len) {
+            pop_front_block();
+            dropped += next;
+        } else {
+            const auto taken = len - dropped;
+            begin_offset_ += taken;
+            break;
+        }
+    }
+}
+
+IOVector IOVector::take_front(IOVector::size_type len) {
+    if (len == 0) {
+        return {};
+    }
+    if (len == size()) {
+        return std::move(*this);
+    }
+
+    CHECK_GE(size(), len);
+    IOVector res;
+    // first iterate over the blocks that completely go into the other vector
+    while (chain_[start_index_].size() - begin_offset_ <= len) {
+        chain_length_ -= chain_[start_index_].size();
+        len -= chain_[start_index_].size() - begin_offset_;
+        if (chain_[start_index_].size() > begin_offset_) {
+            res.append(std::move(chain_[start_index_]));
+            if (begin_offset_) {
+                res.begin_offset_ = std::exchange(begin_offset_, 0);
+            }
+        } else {
+            begin_offset_ = 0;
+        }
+        ++start_index_;
+    }
+
+    if (len > 0) {
+        // what's left is a single buffer that needs to be split between the |res| and |this|
+        // we know that it has to be split - there was a check for the case when it has to
+        // go away as a whole.
+        if (begin_offset_ != 0 || len < chain_[start_index_].size() / 2) {
+            // let's memcpy the data out
+            block_type block(chain_[start_index_].begin() + begin_offset_,
+                             chain_[start_index_].begin() + begin_offset_ + len);
+            res.append(std::move(block));
+            begin_offset_ += len;
+        } else {
+            CHECK_EQ(begin_offset_, 0u);
+            // move out the internal buffer out and copy only the tail of it back in
+            block_type block(chain_[start_index_].begin() + len, chain_[start_index_].end());
+            chain_length_ -= chain_[start_index_].size();
+            chain_[start_index_].resize(len);
+            res.append(std::move(chain_[start_index_]));
+            chain_length_ += block.size();
+            chain_[start_index_] = std::move(block);
+        }
+    }
+    return res;
+}
+
+void IOVector::trim_front() {
+    if ((begin_offset_ == 0 && start_index_ == 0) || chain_.empty()) {
+        return;
+    }
+    block_type& first_block = chain_[start_index_];
+    if (begin_offset_ == first_block.size()) {
+        ++start_index_;
+    } else {
+        memmove(first_block.data(), first_block.data() + begin_offset_,
+                first_block.size() - begin_offset_);
+        first_block.resize(first_block.size() - begin_offset_);
+    }
+    chain_length_ -= begin_offset_;
+    begin_offset_ = 0;
+    trim_chain_front();
+}
+
+void IOVector::trim_chain_front() {
+    if (start_index_) {
+        chain_.erase(chain_.begin(), chain_.begin() + start_index_);
+        start_index_ = 0;
+    }
+}
+
+void IOVector::pop_front_block() {
+    chain_length_ -= chain_[start_index_].size();
+    begin_offset_ = 0;
+    chain_[start_index_].clear();
+    ++start_index_;
+    if (start_index_ > std::max<size_t>(4, chain_.size() / 2)) {
+        trim_chain_front();
+    }
+}
+
+IOVector::block_type IOVector::coalesce() && {
+    // Destructive coalesce() may optimize for several cases when it doesn't need to allocate
+    // new buffer, or even return one of the existing blocks as is. The only guarantee is that
+    // after this call the IOVector is in some valid state. Nothing is guaranteed about the
+    // specifics.
+    if (size() == 0) {
+        return {};
+    }
+    if (begin_offset_ == chain_[start_index_].size() && chain_.size() == start_index_ + 2) {
+        chain_length_ -= chain_.back().size();
+        auto res = std::move(chain_.back());
+        chain_.pop_back();
+        return res;
+    }
+    if (chain_.size() == start_index_ + 1) {
+        chain_length_ -= chain_.back().size();
+        auto res = std::move(chain_.back());
+        chain_.pop_back();
+        if (begin_offset_ != 0) {
+            memmove(res.data(), res.data() + begin_offset_, res.size() - begin_offset_);
+            res.resize(res.size() - begin_offset_);
+            begin_offset_ = 0;
+        }
+        return res;
+    }
+    if (auto& firstBuffer = chain_[start_index_]; firstBuffer.capacity() >= size()) {
+        auto res = std::move(chain_[start_index_]);
+        auto size = res.size();
+        chain_length_ -= size;
+        if (begin_offset_ != 0) {
+            memmove(res.data(), res.data() + begin_offset_, res.size() - begin_offset_);
+            size -= begin_offset_;
+            begin_offset_ = 0;
+        }
+        for (auto i = start_index_ + 1; i < chain_.size(); ++i) {
+            memcpy(res.data() + size, chain_[i].data(), chain_[i].size());
+            size += chain_[i].size();
+        }
+        res.resize(size);
+        ++start_index_;
+        return res;
+    }
+    return const_cast<const IOVector*>(this)->coalesce<>();
+}
+
+std::vector<adb_iovec> IOVector::iovecs() const {
+    std::vector<adb_iovec> result;
+    result.reserve(chain_.size() - start_index_);
+    iterate_blocks([&result](const char* data, size_t len) {
+        adb_iovec iov;
+        iov.iov_base = const_cast<char*>(data);
+        iov.iov_len = len;
+        result.emplace_back(iov);
+    });
+
+    return result;
+}
diff --git a/adb/types.h b/adb/types.h
index 8bd66be..6b00224 100644
--- a/adb/types.h
+++ b/adb/types.h
@@ -19,9 +19,7 @@
 #include <string.h>
 
 #include <algorithm>
-#include <deque>
 #include <memory>
-#include <type_traits>
 #include <utility>
 #include <vector>
 
@@ -33,7 +31,7 @@
 struct Block {
     using iterator = char*;
 
-    Block() {}
+    Block() = default;
 
     explicit Block(size_t size) { allocate(size); }
 
@@ -43,24 +41,21 @@
     }
 
     Block(const Block& copy) = delete;
-    Block(Block&& move) noexcept {
-        std::swap(data_, move.data_);
-        std::swap(capacity_, move.capacity_);
-        std::swap(size_, move.size_);
-    }
+    Block(Block&& move) noexcept
+        : data_(std::exchange(move.data_, nullptr)),
+          capacity_(std::exchange(move.capacity_, 0)),
+          size_(std::exchange(move.size_, 0)) {}
 
     Block& operator=(const Block& copy) = delete;
     Block& operator=(Block&& move) noexcept {
         clear();
-
-        std::swap(data_, move.data_);
-        std::swap(capacity_, move.capacity_);
-        std::swap(size_, move.size_);
-
+        data_ = std::exchange(move.data_, nullptr);
+        capacity_ = std::exchange(move.capacity_, 0);
+        size_ = std::exchange(move.size_, 0);
         return *this;
     }
 
-    ~Block() { clear(); }
+    ~Block() = default;
 
     void resize(size_t new_size) {
         if (!data_) {
@@ -144,146 +139,63 @@
     using block_type = Block;
     using size_type = size_t;
 
-    IOVector() {}
+    IOVector() = default;
 
-    explicit IOVector(std::unique_ptr<block_type> block) {
-        append(std::move(block));
-    }
+    explicit IOVector(block_type&& block) { append(std::move(block)); }
 
     IOVector(const IOVector& copy) = delete;
     IOVector(IOVector&& move) noexcept : IOVector() { *this = std::move(move); }
 
     IOVector& operator=(const IOVector& copy) = delete;
-    IOVector& operator=(IOVector&& move) noexcept {
-        chain_ = std::move(move.chain_);
-        chain_length_ = move.chain_length_;
-        begin_offset_ = move.begin_offset_;
-        end_offset_ = move.end_offset_;
+    IOVector& operator=(IOVector&& move) noexcept;
 
-        move.chain_.clear();
-        move.chain_length_ = 0;
-        move.begin_offset_ = 0;
-        move.end_offset_ = 0;
-
-        return *this;
-    }
-
-    size_type size() const { return chain_length_ - begin_offset_ - end_offset_; }
+    size_type size() const { return chain_length_ - begin_offset_; }
     bool empty() const { return size() == 0; }
 
-    void clear() {
-        chain_length_ = 0;
-        begin_offset_ = 0;
-        end_offset_ = 0;
-        chain_.clear();
-    }
+    // Return the last block so the caller can still reuse its allocated capacity
+    // or it can be simply ignored.
+    block_type clear();
+
+    void drop_front(size_type len);
 
     // Split the first |len| bytes out of this chain into its own.
-    IOVector take_front(size_type len) {
-        IOVector head;
-
-        if (len == 0) {
-            return head;
-        }
-        CHECK_GE(size(), len);
-
-        std::shared_ptr<const block_type> first_block = chain_.front();
-        CHECK_GE(first_block->size(), begin_offset_);
-        head.append_shared(std::move(first_block));
-        head.begin_offset_ = begin_offset_;
-
-        while (head.size() < len) {
-            pop_front_block();
-            CHECK(!chain_.empty());
-
-            head.append_shared(chain_.front());
-        }
-
-        if (head.size() == len) {
-            // Head takes full ownership of the last block it took.
-            head.end_offset_ = 0;
-            begin_offset_ = 0;
-            pop_front_block();
-        } else {
-            // Head takes partial ownership of the last block it took.
-            size_t bytes_taken = head.size() - len;
-            head.end_offset_ = bytes_taken;
-            CHECK_GE(chain_.front()->size(), bytes_taken);
-            begin_offset_ = chain_.front()->size() - bytes_taken;
-        }
-
-        return head;
-    }
+    IOVector take_front(size_type len);
 
     // Add a nonempty block to the chain.
-    // The end of the chain must be a complete block (i.e. end_offset_ == 0).
-    void append(std::unique_ptr<const block_type> block) {
-        if (block->size() == 0) {
+    void append(block_type&& block) {
+        if (block.size() == 0) {
             return;
         }
-
-        CHECK_EQ(0ULL, end_offset_);
-        chain_length_ += block->size();
+        CHECK_NE(0ULL, block.size());
+        chain_length_ += block.size();
         chain_.emplace_back(std::move(block));
     }
 
-    void append(block_type&& block) { append(std::make_unique<block_type>(std::move(block))); }
-
-    void trim_front() {
-        if (begin_offset_ == 0) {
-            return;
-        }
-
-        const block_type* first_block = chain_.front().get();
-        auto copy = std::make_unique<block_type>(first_block->size() - begin_offset_);
-        memcpy(copy->data(), first_block->data() + begin_offset_, copy->size());
-        chain_.front() = std::move(copy);
-
-        chain_length_ -= begin_offset_;
-        begin_offset_ = 0;
-    }
+    void trim_front();
 
   private:
-    // append, except takes a shared_ptr.
-    // Private to prevent exterior mutation of blocks.
-    void append_shared(std::shared_ptr<const block_type> block) {
-        CHECK_NE(0ULL, block->size());
-        CHECK_EQ(0ULL, end_offset_);
-        chain_length_ += block->size();
-        chain_.emplace_back(std::move(block));
-    }
+    void trim_chain_front();
 
     // Drop the front block from the chain, and update chain_length_ appropriately.
-    void pop_front_block() {
-        chain_length_ -= chain_.front()->size();
-        begin_offset_ = 0;
-        chain_.pop_front();
-    }
+    void pop_front_block();
 
     // Iterate over the blocks with a callback with an operator()(const char*, size_t).
     template <typename Fn>
     void iterate_blocks(Fn&& callback) const {
-        if (chain_.size() == 0) {
+        if (size() == 0) {
             return;
         }
 
-        for (size_t i = 0; i < chain_.size(); ++i) {
-            const std::shared_ptr<const block_type>& block = chain_.at(i);
-            const char* begin = block->data();
-            size_t length = block->size();
+        for (size_t i = start_index_; i < chain_.size(); ++i) {
+            const auto& block = chain_[i];
+            const char* begin = block.data();
+            size_t length = block.size();
 
-            // Note that both of these conditions can be true if there's only one block.
-            if (i == 0) {
-                CHECK_GE(block->size(), begin_offset_);
+            if (i == start_index_) {
+                CHECK_GE(block.size(), begin_offset_);
                 begin += begin_offset_;
                 length -= begin_offset_;
             }
-
-            if (i == chain_.size() - 1) {
-                CHECK_GE(length, end_offset_);
-                length -= end_offset_;
-            }
-
             callback(begin, length);
         }
     }
@@ -291,7 +203,7 @@
   public:
     // Copy all of the blocks into a single block.
     template <typename CollectionType = block_type>
-    CollectionType coalesce() const {
+    CollectionType coalesce() const& {
         CollectionType result;
         if (size() == 0) {
             return result;
@@ -308,12 +220,13 @@
         return result;
     }
 
+    block_type coalesce() &&;
+
     template <typename FunctionType>
-    auto coalesced(FunctionType&& f) const ->
-        typename std::result_of<FunctionType(const char*, size_t)>::type {
-        if (chain_.size() == 1) {
+    auto coalesced(FunctionType&& f) const {
+        if (chain_.size() == start_index_ + 1) {
             // If we only have one block, we can use it directly.
-            return f(chain_.front()->data() + begin_offset_, size());
+            return f(chain_[start_index_].data() + begin_offset_, size());
         } else {
             // Otherwise, copy to a single block.
             auto data = coalesce();
@@ -322,23 +235,13 @@
     }
 
     // Get a list of iovecs that can be used to write out all of the blocks.
-    std::vector<adb_iovec> iovecs() const {
-        std::vector<adb_iovec> result;
-        iterate_blocks([&result](const char* data, size_t len) {
-            adb_iovec iov;
-            iov.iov_base = const_cast<char*>(data);
-            iov.iov_len = len;
-            result.emplace_back(iov);
-        });
-
-        return result;
-    }
+    std::vector<adb_iovec> iovecs() const;
 
   private:
     // Total length of all of the blocks in the chain.
     size_t chain_length_ = 0;
 
     size_t begin_offset_ = 0;
-    size_t end_offset_ = 0;
-    std::deque<std::shared_ptr<const block_type>> chain_;
+    size_t start_index_ = 0;
+    std::vector<block_type> chain_;
 };
diff --git a/adb/types_test.cpp b/adb/types_test.cpp
index 1fbd2ca..2c99f95 100644
--- a/adb/types_test.cpp
+++ b/adb/types_test.cpp
@@ -19,21 +19,21 @@
 #include <memory>
 #include "types.h"
 
-static std::unique_ptr<IOVector::block_type> create_block(const std::string& string) {
-    return std::make_unique<IOVector::block_type>(string.begin(), string.end());
+static IOVector::block_type create_block(const std::string& string) {
+    return IOVector::block_type(string.begin(), string.end());
 }
 
-static std::unique_ptr<IOVector::block_type> create_block(char value, size_t len) {
-    auto block = std::make_unique<IOVector::block_type>();
-    block->resize(len);
-    memset(&(*block)[0], value, len);
+static IOVector::block_type create_block(char value, size_t len) {
+    auto block = IOVector::block_type();
+    block.resize(len);
+    memset(&(block)[0], value, len);
     return block;
 }
 
 template <typename T>
-static std::unique_ptr<IOVector::block_type> copy_block(T&& block) {
-    auto copy = std::make_unique<IOVector::block_type>();
-    copy->assign(block->begin(), block->end());
+static IOVector::block_type copy_block(const T& block) {
+    auto copy = IOVector::block_type();
+    copy.assign(block.begin(), block.end());
     return copy;
 }
 
@@ -50,7 +50,7 @@
     bc.append(copy_block(block));
     ASSERT_EQ(100ULL, bc.size());
     auto coalesced = bc.coalesce();
-    ASSERT_EQ(*block, coalesced);
+    ASSERT_EQ(block, coalesced);
 }
 
 TEST(IOVector, single_block_split) {
@@ -60,8 +60,8 @@
     IOVector foo = bc.take_front(3);
     ASSERT_EQ(3ULL, foo.size());
     ASSERT_EQ(3ULL, bc.size());
-    ASSERT_EQ(*create_block("foo"), foo.coalesce());
-    ASSERT_EQ(*create_block("bar"), bc.coalesce());
+    ASSERT_EQ(create_block("foo"), foo.coalesce());
+    ASSERT_EQ(create_block("bar"), bc.coalesce());
 }
 
 TEST(IOVector, aligned_split) {
@@ -73,15 +73,15 @@
 
     IOVector foo = bc.take_front(3);
     ASSERT_EQ(3ULL, foo.size());
-    ASSERT_EQ(*create_block("foo"), foo.coalesce());
+    ASSERT_EQ(create_block("foo"), foo.coalesce());
 
     IOVector bar = bc.take_front(3);
     ASSERT_EQ(3ULL, bar.size());
-    ASSERT_EQ(*create_block("bar"), bar.coalesce());
+    ASSERT_EQ(create_block("bar"), bar.coalesce());
 
     IOVector baz = bc.take_front(3);
     ASSERT_EQ(3ULL, baz.size());
-    ASSERT_EQ(*create_block("baz"), baz.coalesce());
+    ASSERT_EQ(create_block("baz"), baz.coalesce());
 
     ASSERT_EQ(0ULL, bc.size());
 }
@@ -97,23 +97,23 @@
     // Aligned left, misaligned right, across multiple blocks.
     IOVector foob = bc.take_front(4);
     ASSERT_EQ(4ULL, foob.size());
-    ASSERT_EQ(*create_block("foob"), foob.coalesce());
+    ASSERT_EQ(create_block("foob"), foob.coalesce());
 
     // Misaligned left, misaligned right, in one block.
     IOVector a = bc.take_front(1);
     ASSERT_EQ(1ULL, a.size());
-    ASSERT_EQ(*create_block("a"), a.coalesce());
+    ASSERT_EQ(create_block("a"), a.coalesce());
 
     // Misaligned left, misaligned right, across two blocks.
     IOVector rba = bc.take_front(3);
     ASSERT_EQ(3ULL, rba.size());
-    ASSERT_EQ(*create_block("rba"), rba.coalesce());
+    ASSERT_EQ(create_block("rba"), rba.coalesce());
 
     // Misaligned left, misaligned right, across three blocks.
     IOVector zquxquu = bc.take_front(7);
     ASSERT_EQ(7ULL, zquxquu.size());
-    ASSERT_EQ(*create_block("zquxquu"), zquxquu.coalesce());
+    ASSERT_EQ(create_block("zquxquu"), zquxquu.coalesce());
 
     ASSERT_EQ(1ULL, bc.size());
-    ASSERT_EQ(*create_block("x"), bc.coalesce());
+    ASSERT_EQ(create_block("x"), bc.coalesce());
 }
diff --git a/base/Android.bp b/base/Android.bp
index 357ce01..8351461 100644
--- a/base/Android.bp
+++ b/base/Android.bp
@@ -20,8 +20,14 @@
         "-Wall",
         "-Werror",
         "-Wextra",
-        "-D_FILE_OFFSET_BITS=64",
     ],
+    target: {
+        android: {
+            cflags: [
+                "-D_FILE_OFFSET_BITS=64",
+            ],
+        },
+    },
 }
 
 cc_library_headers {
@@ -52,10 +58,10 @@
         "file.cpp",
         "logging.cpp",
         "mapped_file.cpp",
+        "parsebool.cpp",
         "parsenetaddress.cpp",
         "process.cpp",
         "properties.cpp",
-        "quick_exit.cpp",
         "stringprintf.cpp",
         "strings.cpp",
         "threads.cpp",
@@ -143,12 +149,13 @@
         "logging_test.cpp",
         "macros_test.cpp",
         "mapped_file_test.cpp",
+        "no_destructor_test.cpp",
         "parsedouble_test.cpp",
+        "parsebool_test.cpp",
         "parseint_test.cpp",
         "parsenetaddress_test.cpp",
         "process_test.cpp",
         "properties_test.cpp",
-        "quick_exit_test.cpp",
         "result_test.cpp",
         "scopeguard_test.cpp",
         "stringprintf_test.cpp",
diff --git a/base/README.md b/base/README.md
new file mode 100644
index 0000000..2ef5c10
--- /dev/null
+++ b/base/README.md
@@ -0,0 +1,42 @@
+# libbase
+
+## Who is this library for?
+
+This library is a collection of convenience functions to make common tasks
+easier and less error-prone.
+
+In this context, "error-prone" covers both "hard to do correctly" and
+"hard to do with good performance", but as a general purpose library,
+libbase's primary focus is on making it easier to do things easily and
+correctly when a compromise has to be made between "simplest API" on the
+one hand and "fastest implementation" on the other. Though obviously
+the ideal is to have both.
+
+## Should my routine be added?
+
+The intention is to cover the 80% use cases, not be all things to all users.
+
+If you have a routine that's really useful in your project,
+congratulations. But that doesn't mean it should be here rather than
+just in your project.
+
+The question for libbase is "should everyone be doing this?"/"does this
+make everyone's code cleaner/safer?". Historically we've considered the
+bar for inclusion to be "are there at least three *unrelated* projects
+that would be cleaned up by doing so".
+
+If your routine is actually something from a future C++ standard (that
+isn't yet in libc++), or it's widely used in another library, that helps
+show that there's precedent. Being able to say "so-and-so has used this
+API for n years" is a good way to reduce concerns about API choices.
+
+## Any other restrictions?
+
+Unlike most Android code, code in libbase has to build for Mac and
+Windows too.
+
+Code here is also expected to have good test coverage.
+
+By its nature, it's difficult to change libbase API. It's often best
+to start using your routine just in your project, and let it "graduate"
+after you're certain that the API is solid.
diff --git a/base/file.cpp b/base/file.cpp
index 3dfcfbb..6321fc6 100644
--- a/base/file.cpp
+++ b/base/file.cpp
@@ -49,29 +49,54 @@
 #include "android-base/unique_fd.h"
 #include "android-base/utf8.h"
 
+namespace {
+
 #ifdef _WIN32
-int mkstemp(char* template_name) {
-  if (_mktemp(template_name) == nullptr) {
+static int mkstemp(char* name_template, size_t size_in_chars) {
+  std::wstring path;
+  CHECK(android::base::UTF8ToWide(name_template, &path))
+      << "path can't be converted to wchar: " << name_template;
+  if (_wmktemp_s(path.data(), path.size() + 1) != 0) {
     return -1;
   }
+
   // Use open() to match the close() that TemporaryFile's destructor does.
   // Use O_BINARY to match base file APIs.
-  return open(template_name, O_CREAT | O_EXCL | O_RDWR | O_BINARY, S_IRUSR | S_IWUSR);
+  int fd = _wopen(path.c_str(), O_CREAT | O_EXCL | O_RDWR | O_BINARY, S_IRUSR | S_IWUSR);
+  if (fd < 0) {
+    return -1;
+  }
+
+  std::string path_utf8;
+  CHECK(android::base::WideToUTF8(path, &path_utf8)) << "path can't be converted to utf8";
+  CHECK(strcpy_s(name_template, size_in_chars, path_utf8.c_str()) == 0)
+      << "utf8 path can't be assigned back to name_template";
+
+  return fd;
 }
 
-char* mkdtemp(char* template_name) {
-  if (_mktemp(template_name) == nullptr) {
+static char* mkdtemp(char* name_template, size_t size_in_chars) {
+  std::wstring path;
+  CHECK(android::base::UTF8ToWide(name_template, &path))
+      << "path can't be converted to wchar: " << name_template;
+
+  if (_wmktemp_s(path.data(), path.size() + 1) != 0) {
     return nullptr;
   }
-  if (_mkdir(template_name) == -1) {
+
+  if (_wmkdir(path.c_str()) != 0) {
     return nullptr;
   }
-  return template_name;
+
+  std::string path_utf8;
+  CHECK(android::base::WideToUTF8(path, &path_utf8)) << "path can't be converted to utf8";
+  CHECK(strcpy_s(name_template, size_in_chars, path_utf8.c_str()) == 0)
+      << "utf8 path can't be assigned back to name_template";
+
+  return name_template;
 }
 #endif
 
-namespace {
-
 std::string GetSystemTempDir() {
 #if defined(__ANDROID__)
   const auto* tmpdir = getenv("TMPDIR");
@@ -83,15 +108,20 @@
   // so try current directory if /data/local/tmp is not accessible.
   return ".";
 #elif defined(_WIN32)
-  char tmp_dir[MAX_PATH];
-  DWORD result = GetTempPathA(sizeof(tmp_dir), tmp_dir);  // checks TMP env
-  CHECK_NE(result, 0ul) << "GetTempPathA failed, error: " << GetLastError();
-  CHECK_LT(result, sizeof(tmp_dir)) << "path truncated to: " << result;
+  wchar_t tmp_dir_w[MAX_PATH];
+  DWORD result = GetTempPathW(std::size(tmp_dir_w), tmp_dir_w);  // checks TMP env
+  CHECK_NE(result, 0ul) << "GetTempPathW failed, error: " << GetLastError();
+  CHECK_LT(result, std::size(tmp_dir_w)) << "path truncated to: " << result;
 
   // GetTempPath() returns a path with a trailing slash, but init()
   // does not expect that, so remove it.
-  CHECK_EQ(tmp_dir[result - 1], '\\');
-  tmp_dir[result - 1] = '\0';
+  if (tmp_dir_w[result - 1] == L'\\') {
+    tmp_dir_w[result - 1] = L'\0';
+  }
+
+  std::string tmp_dir;
+  CHECK(android::base::WideToUTF8(tmp_dir_w, &tmp_dir)) << "path can't be converted to utf8";
+
   return tmp_dir;
 #else
   const auto* tmpdir = getenv("TMPDIR");
@@ -127,7 +157,11 @@
 
 void TemporaryFile::init(const std::string& tmp_dir) {
   snprintf(path, sizeof(path), "%s%cTemporaryFile-XXXXXX", tmp_dir.c_str(), OS_PATH_SEPARATOR);
+#if defined(_WIN32)
+  fd = mkstemp(path, sizeof(path));
+#else
   fd = mkstemp(path);
+#endif
 }
 
 TemporaryDir::TemporaryDir() {
@@ -167,7 +201,11 @@
 
 bool TemporaryDir::init(const std::string& tmp_dir) {
   snprintf(path, sizeof(path), "%s%cTemporaryDir-XXXXXX", tmp_dir.c_str(), OS_PATH_SEPARATOR);
+#if defined(_WIN32)
+  return (mkdtemp(path, sizeof(path)) != nullptr);
+#else
   return (mkdtemp(path) != nullptr);
+#endif
 }
 
 namespace android {
diff --git a/base/file_test.cpp b/base/file_test.cpp
index f64e81c..120228d 100644
--- a/base/file_test.cpp
+++ b/base/file_test.cpp
@@ -16,18 +16,25 @@
 
 #include "android-base/file.h"
 
+#include "android-base/utf8.h"
+
 #include <gtest/gtest.h>
 
 #include <errno.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <wchar.h>
 
 #include <string>
 
 #if !defined(_WIN32)
 #include <pwd.h>
+#else
+#include <windows.h>
 #endif
 
+#include "android-base/logging.h"  // and must be after windows.h for ERROR
+
 TEST(file, ReadFileToString_ENOENT) {
   std::string s("hello");
   errno = 0;
@@ -38,7 +45,7 @@
 
 TEST(file, ReadFileToString_WriteStringToFile) {
   TemporaryFile tf;
-  ASSERT_TRUE(tf.fd != -1);
+  ASSERT_NE(tf.fd, -1) << tf.path;
   ASSERT_TRUE(android::base::WriteStringToFile("abc", tf.path))
     << strerror(errno);
   std::string s;
@@ -70,7 +77,7 @@
 #if !defined(_WIN32)
 TEST(file, WriteStringToFile2) {
   TemporaryFile tf;
-  ASSERT_TRUE(tf.fd != -1);
+  ASSERT_NE(tf.fd, -1) << tf.path;
   ASSERT_TRUE(android::base::WriteStringToFile("abc", tf.path, 0660,
                                                getuid(), getgid()))
       << strerror(errno);
@@ -86,9 +93,92 @@
 }
 #endif
 
+#if defined(_WIN32)
+TEST(file, NonUnicodeCharsWindows) {
+  constexpr auto kMaxEnvVariableValueSize = 32767;
+  std::wstring old_tmp;
+  old_tmp.resize(kMaxEnvVariableValueSize);
+  old_tmp.resize(GetEnvironmentVariableW(L"TMP", old_tmp.data(), old_tmp.size()));
+  if (old_tmp.empty()) {
+    // Can't continue with empty TMP folder.
+    return;
+  }
+
+  std::wstring new_tmp = old_tmp;
+  if (new_tmp.back() != L'\\') {
+    new_tmp.push_back(L'\\');
+  }
+
+  {
+    auto path(new_tmp + L"锦绣成都\\");
+    _wmkdir(path.c_str());
+    ASSERT_TRUE(SetEnvironmentVariableW(L"TMP", path.c_str()));
+
+    TemporaryFile tf;
+    ASSERT_NE(tf.fd, -1) << tf.path;
+    ASSERT_TRUE(android::base::WriteStringToFd("abc", tf.fd));
+
+    ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET)) << strerror(errno);
+
+    std::string s;
+    ASSERT_TRUE(android::base::ReadFdToString(tf.fd, &s)) << strerror(errno);
+    EXPECT_EQ("abc", s);
+  }
+  {
+    auto path(new_tmp + L"директория с длинным именем\\");
+    _wmkdir(path.c_str());
+    ASSERT_TRUE(SetEnvironmentVariableW(L"TMP", path.c_str()));
+
+    TemporaryFile tf;
+    ASSERT_NE(tf.fd, -1) << tf.path;
+    ASSERT_TRUE(android::base::WriteStringToFd("abc", tf.fd));
+
+    ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET)) << strerror(errno);
+
+    std::string s;
+    ASSERT_TRUE(android::base::ReadFdToString(tf.fd, &s)) << strerror(errno);
+    EXPECT_EQ("abc", s);
+  }
+  {
+    auto path(new_tmp + L"äüöß weiß\\");
+    _wmkdir(path.c_str());
+    ASSERT_TRUE(SetEnvironmentVariableW(L"TMP", path.c_str()));
+
+    TemporaryFile tf;
+    ASSERT_NE(tf.fd, -1) << tf.path;
+    ASSERT_TRUE(android::base::WriteStringToFd("abc", tf.fd));
+
+    ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET)) << strerror(errno);
+
+    std::string s;
+    ASSERT_TRUE(android::base::ReadFdToString(tf.fd, &s)) << strerror(errno);
+    EXPECT_EQ("abc", s);
+  }
+
+  SetEnvironmentVariableW(L"TMP", old_tmp.c_str());
+}
+
+TEST(file, RootDirectoryWindows) {
+  constexpr auto kMaxEnvVariableValueSize = 32767;
+  std::wstring old_tmp;
+  bool tmp_is_empty = false;
+  old_tmp.resize(kMaxEnvVariableValueSize);
+  old_tmp.resize(GetEnvironmentVariableW(L"TMP", old_tmp.data(), old_tmp.size()));
+  if (old_tmp.empty()) {
+    tmp_is_empty = (GetLastError() == ERROR_ENVVAR_NOT_FOUND);
+  }
+  SetEnvironmentVariableW(L"TMP", L"C:");
+
+  TemporaryFile tf;
+  ASSERT_NE(tf.fd, -1) << tf.path;
+
+  SetEnvironmentVariableW(L"TMP", tmp_is_empty ? nullptr : old_tmp.c_str());
+}
+#endif
+
 TEST(file, WriteStringToFd) {
   TemporaryFile tf;
-  ASSERT_TRUE(tf.fd != -1);
+  ASSERT_NE(tf.fd, -1) << tf.path;
   ASSERT_TRUE(android::base::WriteStringToFd("abc", tf.fd));
 
   ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET)) << strerror(errno);
@@ -100,7 +190,7 @@
 
 TEST(file, WriteFully) {
   TemporaryFile tf;
-  ASSERT_TRUE(tf.fd != -1);
+  ASSERT_NE(tf.fd, -1) << tf.path;
   ASSERT_TRUE(android::base::WriteFully(tf.fd, "abc", 3));
 
   ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET)) << strerror(errno);
@@ -119,7 +209,7 @@
 
 TEST(file, RemoveFileIfExists) {
   TemporaryFile tf;
-  ASSERT_TRUE(tf.fd != -1);
+  ASSERT_NE(tf.fd, -1) << tf.path;
   close(tf.fd);
   tf.fd = -1;
   std::string err;
@@ -253,7 +343,7 @@
 
 TEST(file, ReadFileToString_capacity) {
   TemporaryFile tf;
-  ASSERT_TRUE(tf.fd != -1);
+  ASSERT_NE(tf.fd, -1) << tf.path;
 
   // For a huge file, the overhead should still be small.
   std::string s;
@@ -280,7 +370,7 @@
 
 TEST(file, ReadFileToString_capacity_0) {
   TemporaryFile tf;
-  ASSERT_TRUE(tf.fd != -1);
+  ASSERT_NE(tf.fd, -1) << tf.path;
 
   // Because /proc reports its files as zero-length, we don't actually trust
   // any file that claims to be zero-length. Rather than add increasingly
diff --git a/base/include/android-base/endian.h b/base/include/android-base/endian.h
index cbbd8c9..8fa6365 100644
--- a/base/include/android-base/endian.h
+++ b/base/include/android-base/endian.h
@@ -18,6 +18,9 @@
 
 /* A cross-platform equivalent of bionic's <sys/endian.h>. */
 
+/* For __BIONIC__ and __GLIBC__ */
+#include <sys/cdefs.h>
+
 #if defined(__BIONIC__)
 
 #include <sys/endian.h>
@@ -38,26 +41,34 @@
 #define betoh16(x) be16toh(x)
 #define betoh32(x) be32toh(x)
 #define betoh64(x) be64toh(x)
+#define letoh16(x) le16toh(x)
+#define letoh32(x) le32toh(x)
+#define letoh64(x) le64toh(x)
 
 #else
 
-/* Mac OS and Windows have nothing. */
-
-#define __LITTLE_ENDIAN 1234
-#define LITTLE_ENDIAN __LITTLE_ENDIAN
-
-#define __BIG_ENDIAN 4321
-#define BIG_ENDIAN __BIG_ENDIAN
-
-#define __BYTE_ORDER __LITTLE_ENDIAN
-#define BYTE_ORDER __BYTE_ORDER
-
+#if defined(__APPLE__)
+/* macOS has some of the basics. */
+#include <sys/_endian.h>
+#else
+/* Windows has some of the basics as well. */
+#include <sys/param.h>
+#include <winsock2.h>
+/* winsock2.h *must* be included before the following four macros. */
 #define htons(x) __builtin_bswap16(x)
 #define htonl(x) __builtin_bswap32(x)
-#define htonq(x) __builtin_bswap64(x)
-
 #define ntohs(x) __builtin_bswap16(x)
 #define ntohl(x) __builtin_bswap32(x)
+#endif
+
+/* Neither macOS nor Windows have the rest. */
+
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#define __BYTE_ORDER __LITTLE_ENDIAN
+
+#define htonq(x) __builtin_bswap64(x)
+
 #define ntohq(x) __builtin_bswap64(x)
 
 #define htobe16(x) __builtin_bswap16(x)
diff --git a/base/include/android-base/format.h b/base/include/android-base/format.h
index 6799c1f..330040d 100644
--- a/base/include/android-base/format.h
+++ b/base/include/android-base/format.h
@@ -18,8 +18,11 @@
 
 // We include fmtlib here as an alias, since libbase will have fmtlib statically linked already.
 // It is accessed through its normal fmt:: namespace.
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wshadow"
+#include <fmt/chrono.h>
+#pragma clang diagnostic pop
 #include <fmt/core.h>
 #include <fmt/format.h>
 #include <fmt/ostream.h>
 #include <fmt/printf.h>
-#include <fmt/time.h>
diff --git a/base/include/android-base/mapped_file.h b/base/include/android-base/mapped_file.h
index 2ab49ab..6a19f1b 100644
--- a/base/include/android-base/mapped_file.h
+++ b/base/include/android-base/mapped_file.h
@@ -28,15 +28,17 @@
 #include <windows.h>
 #define PROT_READ 1
 #define PROT_WRITE 2
+using os_handle = HANDLE;
 #else
 #include <sys/mman.h>
+using os_handle = int;
 #endif
 
 namespace android {
 namespace base {
 
 /**
- * A region of a file mapped into memory, also known as MmapFile.
+ * A region of a file mapped into memory (for grepping: also known as MmapFile or file mapping).
  */
 class MappedFile {
  public:
@@ -49,16 +51,33 @@
                                             int prot);
 
   /**
+   * Same thing, but using the raw OS file handle instead of a CRT wrapper.
+   */
+  static MappedFile FromOsHandle(os_handle h, off64_t offset, size_t length, int prot);
+
+  /**
    * Removes the mapping.
    */
   ~MappedFile();
 
-  char* data() { return base_ + offset_; }
-  size_t size() { return size_; }
+  /**
+   * Not copyable but movable.
+   */
+  MappedFile(MappedFile&& other);
+  MappedFile& operator=(MappedFile&& other);
+
+  char* data() const { return base_ + offset_; }
+  size_t size() const { return size_; }
+
+  bool isValid() const { return base_ != nullptr; }
+
+  explicit operator bool() const { return isValid(); }
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(MappedFile);
 
+  void Close();
+
   char* base_;
   size_t size_;
 
diff --git a/base/include/android-base/no_destructor.h b/base/include/android-base/no_destructor.h
new file mode 100644
index 0000000..ce0dc9f
--- /dev/null
+++ b/base/include/android-base/no_destructor.h
@@ -0,0 +1,94 @@
+#pragma once
+
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <utility>
+
+#include "android-base/macros.h"
+
+namespace android {
+namespace base {
+
+// A wrapper that makes it easy to create an object of type T with static
+// storage duration that:
+// - is only constructed on first access
+// - never invokes the destructor
+// in order to satisfy the styleguide ban on global constructors and
+// destructors.
+//
+// Runtime constant example:
+// const std::string& GetLineSeparator() {
+//  // Forwards to std::string(size_t, char, const Allocator&) constructor.
+//   static const base::NoDestructor<std::string> s(5, '-');
+//   return *s;
+// }
+//
+// More complex initialization with a lambda:
+// const std::string& GetSessionNonce() {
+//   static const base::NoDestructor<std::string> nonce([] {
+//     std::string s(16);
+//     crypto::RandString(s.data(), s.size());
+//     return s;
+//   }());
+//   return *nonce;
+// }
+//
+// NoDestructor<T> stores the object inline, so it also avoids a pointer
+// indirection and a malloc. Also note that since C++11 static local variable
+// initialization is thread-safe and so is this pattern. Code should prefer to
+// use NoDestructor<T> over:
+// - A function scoped static T* or T& that is dynamically initialized.
+// - A global base::LazyInstance<T>.
+//
+// Note that since the destructor is never run, this *will* leak memory if used
+// as a stack or member variable. Furthermore, a NoDestructor<T> should never
+// have global scope as that may require a static initializer.
+template <typename T>
+class NoDestructor {
+ public:
+  // Not constexpr; just write static constexpr T x = ...; if the value should
+  // be a constexpr.
+  template <typename... Args>
+  explicit NoDestructor(Args&&... args) {
+    new (storage_) T(std::forward<Args>(args)...);
+  }
+
+  // Allows copy and move construction of the contained type, to allow
+  // construction from an initializer list, e.g. for std::vector.
+  explicit NoDestructor(const T& x) { new (storage_) T(x); }
+  explicit NoDestructor(T&& x) { new (storage_) T(std::move(x)); }
+
+  NoDestructor(const NoDestructor&) = delete;
+  NoDestructor& operator=(const NoDestructor&) = delete;
+
+  ~NoDestructor() = default;
+
+  const T& operator*() const { return *get(); }
+  T& operator*() { return *get(); }
+
+  const T* operator->() const { return get(); }
+  T* operator->() { return get(); }
+
+  const T* get() const { return reinterpret_cast<const T*>(storage_); }
+  T* get() { return reinterpret_cast<T*>(storage_); }
+
+ private:
+  alignas(T) char storage_[sizeof(T)];
+};
+
+}  // namespace base
+}  // namespace android
diff --git a/base/include/android-base/parsebool.h b/base/include/android-base/parsebool.h
new file mode 100644
index 0000000..b2bd021
--- /dev/null
+++ b/base/include/android-base/parsebool.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <string_view>
+
+namespace android {
+namespace base {
+
+// Parse the given string as yes or no inactivation of some sort. Return one of the
+// ParseBoolResult enumeration values.
+//
+// The following values parse as true:
+//
+//   1
+//   on
+//   true
+//   y
+//   yes
+//
+//
+// The following values parse as false:
+//
+//   0
+//   false
+//   n
+//   no
+//   off
+//
+// Anything else is a parse error.
+//
+// The purpose of this function is to have a single canonical parser for yes-or-no indications
+// throughout the system.
+
+enum class ParseBoolResult {
+  kError,
+  kFalse,
+  kTrue,
+};
+
+ParseBoolResult ParseBool(std::string_view s);
+
+}  // namespace base
+}  // namespace android
diff --git a/base/include/android-base/quick_exit.h b/base/include/android-base/quick_exit.h
deleted file mode 100644
index a03b14f..0000000
--- a/base/include/android-base/quick_exit.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <stdlib.h>
-
-// Provide emulation for at_quick_exit/quick_exit on platforms that don't have it.
-namespace android {
-namespace base {
-
-// Bionic and glibc have quick_exit, Darwin and Windows don't.
-#if !defined(__linux__)
-  void quick_exit(int exit_code) __attribute__((noreturn));
-  int at_quick_exit(void (*func)());
-#else
-  using ::at_quick_exit;
-  using ::quick_exit;
-#endif
-}
-}
diff --git a/base/include/android-base/strings.h b/base/include/android-base/strings.h
index b1c22c9..14d534a 100644
--- a/base/include/android-base/strings.h
+++ b/base/include/android-base/strings.h
@@ -85,5 +85,10 @@
   return true;
 }
 
+// Replaces `from` with `to` in `s`, once if `all == false`, or as many times as
+// there are matches if `all == true`.
+[[nodiscard]] std::string StringReplace(std::string_view s, std::string_view from,
+                                        std::string_view to, bool all);
+
 }  // namespace base
 }  // namespace android
diff --git a/base/include/android-base/unique_fd.h b/base/include/android-base/unique_fd.h
index 6e11b4e..1605daf 100644
--- a/base/include/android-base/unique_fd.h
+++ b/base/include/android-base/unique_fd.h
@@ -120,7 +120,7 @@
   // Catch bogus error checks (i.e.: "!fd" instead of "fd != -1").
   bool operator!() const = delete;
 
-  bool ok() const { return get() != -1; }
+  bool ok() const { return get() >= 0; }
 
   int release() __attribute__((warn_unused_result)) {
     tag(fd_, this, nullptr);
diff --git a/base/mapped_file.cpp b/base/mapped_file.cpp
index f60de56..862b73b 100644
--- a/base/mapped_file.cpp
+++ b/base/mapped_file.cpp
@@ -16,13 +16,15 @@
 
 #include "android-base/mapped_file.h"
 
-#include <errno.h>
+#include <utility>
 
-#include "android-base/unique_fd.h"
+#include <errno.h>
 
 namespace android {
 namespace base {
 
+static constexpr char kEmptyBuffer[] = {'0'};
+
 static off64_t InitPageSize() {
 #if defined(_WIN32)
   SYSTEM_INFO si;
@@ -35,51 +37,86 @@
 
 std::unique_ptr<MappedFile> MappedFile::FromFd(borrowed_fd fd, off64_t offset, size_t length,
                                                int prot) {
-  static off64_t page_size = InitPageSize();
+#if defined(_WIN32)
+  auto file =
+      FromOsHandle(reinterpret_cast<HANDLE>(_get_osfhandle(fd.get())), offset, length, prot);
+#else
+  auto file = FromOsHandle(fd.get(), offset, length, prot);
+#endif
+  return file ? std::make_unique<MappedFile>(std::move(file)) : std::unique_ptr<MappedFile>{};
+}
+
+MappedFile MappedFile::FromOsHandle(os_handle h, off64_t offset, size_t length, int prot) {
+  static const off64_t page_size = InitPageSize();
   size_t slop = offset % page_size;
   off64_t file_offset = offset - slop;
   off64_t file_length = length + slop;
 
 #if defined(_WIN32)
-  HANDLE handle =
-      CreateFileMapping(reinterpret_cast<HANDLE>(_get_osfhandle(fd.get())), nullptr,
-                        (prot & PROT_WRITE) ? PAGE_READWRITE : PAGE_READONLY, 0, 0, nullptr);
+  HANDLE handle = CreateFileMappingW(
+      h, nullptr, (prot & PROT_WRITE) ? PAGE_READWRITE : PAGE_READONLY, 0, 0, nullptr);
   if (handle == nullptr) {
     // http://b/119818070 "app crashes when reading asset of zero length".
     // Return a MappedFile that's only valid for reading the size.
-    if (length == 0) {
-      return std::unique_ptr<MappedFile>(new MappedFile{nullptr, 0, 0, nullptr});
+    if (length == 0 && ::GetLastError() == ERROR_FILE_INVALID) {
+      return MappedFile{const_cast<char*>(kEmptyBuffer), 0, 0, nullptr};
     }
-    return nullptr;
+    return MappedFile(nullptr, 0, 0, nullptr);
   }
   void* base = MapViewOfFile(handle, (prot & PROT_WRITE) ? FILE_MAP_ALL_ACCESS : FILE_MAP_READ, 0,
                              file_offset, file_length);
   if (base == nullptr) {
     CloseHandle(handle);
-    return nullptr;
+    return MappedFile(nullptr, 0, 0, nullptr);
   }
-  return std::unique_ptr<MappedFile>(
-      new MappedFile{static_cast<char*>(base), length, slop, handle});
+  return MappedFile{static_cast<char*>(base), length, slop, handle};
 #else
-  void* base = mmap(nullptr, file_length, prot, MAP_SHARED, fd.get(), file_offset);
+  void* base = mmap(nullptr, file_length, prot, MAP_SHARED, h, file_offset);
   if (base == MAP_FAILED) {
     // http://b/119818070 "app crashes when reading asset of zero length".
     // mmap fails with EINVAL for a zero length region.
     if (errno == EINVAL && length == 0) {
-      return std::unique_ptr<MappedFile>(new MappedFile{nullptr, 0, 0});
+      return MappedFile{const_cast<char*>(kEmptyBuffer), 0, 0};
     }
-    return nullptr;
+    return MappedFile(nullptr, 0, 0);
   }
-  return std::unique_ptr<MappedFile>(new MappedFile{static_cast<char*>(base), length, slop});
+  return MappedFile{static_cast<char*>(base), length, slop};
 #endif
 }
 
+MappedFile::MappedFile(MappedFile&& other)
+    : base_(std::exchange(other.base_, nullptr)),
+      size_(std::exchange(other.size_, 0)),
+      offset_(std::exchange(other.offset_, 0))
+#ifdef _WIN32
+      ,
+      handle_(std::exchange(other.handle_, nullptr))
+#endif
+{
+}
+
+MappedFile& MappedFile::operator=(MappedFile&& other) {
+  Close();
+  base_ = std::exchange(other.base_, nullptr);
+  size_ = std::exchange(other.size_, 0);
+  offset_ = std::exchange(other.offset_, 0);
+#ifdef _WIN32
+  handle_ = std::exchange(other.handle_, nullptr);
+#endif
+  return *this;
+}
+
 MappedFile::~MappedFile() {
+  Close();
+}
+
+void MappedFile::Close() {
 #if defined(_WIN32)
-  if (base_ != nullptr) UnmapViewOfFile(base_);
+  if (base_ != nullptr && size_ != 0) UnmapViewOfFile(base_);
   if (handle_ != nullptr) CloseHandle(handle_);
+  handle_ = nullptr;
 #else
-  if (base_ != nullptr) munmap(base_, size_ + offset_);
+  if (base_ != nullptr && size_ != 0) munmap(base_, size_ + offset_);
 #endif
 
   base_ = nullptr;
diff --git a/base/mapped_file_test.cpp b/base/mapped_file_test.cpp
index cfde73c..3629108 100644
--- a/base/mapped_file_test.cpp
+++ b/base/mapped_file_test.cpp
@@ -44,5 +44,8 @@
   ASSERT_TRUE(tf.fd != -1);
 
   auto m = android::base::MappedFile::FromFd(tf.fd, 4096, 0, PROT_READ);
-  ASSERT_EQ(0u, m->size());
+  ASSERT_NE(nullptr, m);
+  EXPECT_TRUE((bool)*m);
+  EXPECT_EQ(0u, m->size());
+  EXPECT_NE(nullptr, m->data());
 }
diff --git a/base/no_destructor_test.cpp b/base/no_destructor_test.cpp
new file mode 100644
index 0000000..f19468a
--- /dev/null
+++ b/base/no_destructor_test.cpp
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "android-base/no_destructor.h"
+
+#include <gtest/gtest.h>
+
+struct __attribute__((packed)) Bomb {
+  Bomb() : magic_(123) {}
+
+  ~Bomb() { exit(42); }
+
+  int get() const { return magic_; }
+
+ private:
+  [[maybe_unused]] char padding_;
+  int magic_;
+};
+
+TEST(no_destructor, bomb) {
+  ASSERT_EXIT(({
+                {
+                  Bomb b;
+                  if (b.get() != 123) exit(1);
+                }
+
+                exit(0);
+              }),
+              ::testing::ExitedWithCode(42), "");
+}
+
+TEST(no_destructor, defused) {
+  ASSERT_EXIT(({
+                {
+                  android::base::NoDestructor<Bomb> b;
+                  if (b->get() != 123) exit(1);
+                }
+
+                exit(0);
+              }),
+              ::testing::ExitedWithCode(0), "");
+}
+
+TEST(no_destructor, operators) {
+  android::base::NoDestructor<Bomb> b;
+  const android::base::NoDestructor<Bomb>& c = b;
+  ASSERT_EQ(123, b.get()->get());
+  ASSERT_EQ(123, b->get());
+  ASSERT_EQ(123, (*b).get());
+  ASSERT_EQ(123, c.get()->get());
+  ASSERT_EQ(123, c->get());
+  ASSERT_EQ(123, (*c).get());
+}
diff --git a/libmeminfo/vts/vts_meminfo_test.cpp b/base/parsebool.cpp
similarity index 62%
copy from libmeminfo/vts/vts_meminfo_test.cpp
copy to base/parsebool.cpp
index 3193c31..ff96fe9 100644
--- a/libmeminfo/vts/vts_meminfo_test.cpp
+++ b/base/parsebool.cpp
@@ -14,18 +14,21 @@
  * limitations under the License.
  */
 
-#include <gtest/gtest.h>
-
-#include <meminfo/procmeminfo.h>
+#include "android-base/parsebool.h"
+#include <errno.h>
 
 namespace android {
-namespace meminfo {
+namespace base {
 
-// /proc/<pid>/smaps_rollup support is required.
-TEST(SmapsRollup, IsSupported) {
-    // Use init's pid for this test since it's the only known pid.
-    ASSERT_TRUE(IsSmapsRollupSupported(1));
+ParseBoolResult ParseBool(std::string_view s) {
+  if (s == "1" || s == "y" || s == "yes" || s == "on" || s == "true") {
+    return ParseBoolResult::kTrue;
+  }
+  if (s == "0" || s == "n" || s == "no" || s == "off" || s == "false") {
+    return ParseBoolResult::kFalse;
+  }
+  return ParseBoolResult::kError;
 }
 
-}  // namespace meminfo
+}  // namespace base
 }  // namespace android
diff --git a/base/parsebool_test.cpp b/base/parsebool_test.cpp
new file mode 100644
index 0000000..a081994
--- /dev/null
+++ b/base/parsebool_test.cpp
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "android-base/parsebool.h"
+
+#include <errno.h>
+
+#include <gtest/gtest.h>
+#include <string_view>
+
+using android::base::ParseBool;
+using android::base::ParseBoolResult;
+
+TEST(parsebool, true_) {
+  static const char* yes[] = {
+      "1", "on", "true", "y", "yes",
+  };
+  for (const char* s : yes) {
+    ASSERT_EQ(ParseBoolResult::kTrue, ParseBool(s));
+  }
+}
+
+TEST(parsebool, false_) {
+  static const char* no[] = {
+      "0", "false", "n", "no", "off",
+  };
+  for (const char* s : no) {
+    ASSERT_EQ(ParseBoolResult::kFalse, ParseBool(s));
+  }
+}
+
+TEST(parsebool, invalid) {
+  ASSERT_EQ(ParseBoolResult::kError, ParseBool("blarg"));
+  ASSERT_EQ(ParseBoolResult::kError, ParseBool(""));
+}
diff --git a/base/properties.cpp b/base/properties.cpp
index d5a5918..4731bf2 100644
--- a/base/properties.cpp
+++ b/base/properties.cpp
@@ -28,19 +28,22 @@
 #include <map>
 #include <string>
 
+#include <android-base/parsebool.h>
 #include <android-base/parseint.h>
 
 namespace android {
 namespace base {
 
 bool GetBoolProperty(const std::string& key, bool default_value) {
-  std::string value = GetProperty(key, "");
-  if (value == "1" || value == "y" || value == "yes" || value == "on" || value == "true") {
-    return true;
-  } else if (value == "0" || value == "n" || value == "no" || value == "off" || value == "false") {
-    return false;
+  switch (ParseBool(GetProperty(key, ""))) {
+    case ParseBoolResult::kError:
+      return default_value;
+    case ParseBoolResult::kFalse:
+      return false;
+    case ParseBoolResult::kTrue:
+      return true;
   }
-  return default_value;
+  __builtin_unreachable();
 }
 
 template <typename T>
diff --git a/base/quick_exit.cpp b/base/quick_exit.cpp
deleted file mode 100644
index e4dd62b..0000000
--- a/base/quick_exit.cpp
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "android-base/quick_exit.h"
-
-#if !defined(__linux__)
-
-#include <mutex>
-#include <vector>
-
-namespace android {
-namespace base {
-
-static auto& quick_exit_mutex = *new std::mutex();
-static auto& quick_exit_handlers = *new std::vector<void (*)()>();
-
-void quick_exit(int exit_code) {
-  std::lock_guard<std::mutex> lock(quick_exit_mutex);
-  for (auto it = quick_exit_handlers.rbegin(); it != quick_exit_handlers.rend(); ++it) {
-    (*it)();
-  }
-  _Exit(exit_code);
-}
-
-int at_quick_exit(void (*func)()) {
-  std::lock_guard<std::mutex> lock(quick_exit_mutex);
-  quick_exit_handlers.push_back(func);
-  return 0;
-}
-
-}  // namespace base
-}  // namespace android
-#endif
diff --git a/base/quick_exit_test.cpp b/base/quick_exit_test.cpp
deleted file mode 100644
index 7ca8156..0000000
--- a/base/quick_exit_test.cpp
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "android-base/quick_exit.h"
-
-#include <gtest/gtest.h>
-
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include <string>
-
-#include "android-base/test_utils.h"
-
-// These tests are a bit sketchy, since each test run adds global state that affects subsequent
-// tests (including ones not in this file!). Exit with 0 in Exiter and stick the at_quick_exit test
-// at the end to hack around this.
-struct Exiter {
-  ~Exiter() {
-    _Exit(0);
-  }
-};
-
-TEST(quick_exit, smoke) {
-  ASSERT_EXIT(android::base::quick_exit(123), testing::ExitedWithCode(123), "");
-}
-
-TEST(quick_exit, skip_static_destructors) {
-  static Exiter exiter;
-  ASSERT_EXIT(android::base::quick_exit(123), testing::ExitedWithCode(123), "");
-}
-
-TEST(quick_exit, at_quick_exit) {
-  static int counter = 4;
-  // "Functions passed to at_quick_exit are called in reverse order of their registration."
-  ASSERT_EQ(0, android::base::at_quick_exit([]() { _exit(counter); }));
-  ASSERT_EQ(0, android::base::at_quick_exit([]() { counter += 2; }));
-  ASSERT_EQ(0, android::base::at_quick_exit([]() { counter *= 10; }));
-  ASSERT_EXIT(android::base::quick_exit(123), testing::ExitedWithCode(42), "");
-}
diff --git a/base/strings.cpp b/base/strings.cpp
index bb3167e..40b2bf2 100644
--- a/base/strings.cpp
+++ b/base/strings.cpp
@@ -116,5 +116,24 @@
   return lhs.size() == rhs.size() && strncasecmp(lhs.data(), rhs.data(), lhs.size()) == 0;
 }
 
+std::string StringReplace(std::string_view s, std::string_view from, std::string_view to,
+                          bool all) {
+  if (from.empty()) return std::string(s);
+
+  std::string result;
+  std::string_view::size_type start_pos = 0;
+  do {
+    std::string_view::size_type pos = s.find(from, start_pos);
+    if (pos == std::string_view::npos) break;
+
+    result.append(s.data() + start_pos, pos - start_pos);
+    result.append(to.data(), to.size());
+
+    start_pos = pos + from.size();
+  } while (all);
+  result.append(s.data() + start_pos, s.size() - start_pos);
+  return result;
+}
+
 }  // namespace base
 }  // namespace android
diff --git a/base/strings_test.cpp b/base/strings_test.cpp
index ca3c0b8..5ae3094 100644
--- a/base/strings_test.cpp
+++ b/base/strings_test.cpp
@@ -311,3 +311,46 @@
   ASSERT_TRUE(android::base::ConsumeSuffix(&s, ".bar"));
   ASSERT_EQ("foo", s);
 }
+
+TEST(strings, StringReplace_false) {
+  // No change.
+  ASSERT_EQ("abcabc", android::base::StringReplace("abcabc", "z", "Z", false));
+  ASSERT_EQ("", android::base::StringReplace("", "z", "Z", false));
+  ASSERT_EQ("abcabc", android::base::StringReplace("abcabc", "", "Z", false));
+
+  // Equal lengths.
+  ASSERT_EQ("Abcabc", android::base::StringReplace("abcabc", "a", "A", false));
+  ASSERT_EQ("aBcabc", android::base::StringReplace("abcabc", "b", "B", false));
+  ASSERT_EQ("abCabc", android::base::StringReplace("abcabc", "c", "C", false));
+
+  // Longer replacement.
+  ASSERT_EQ("foobcabc", android::base::StringReplace("abcabc", "a", "foo", false));
+  ASSERT_EQ("afoocabc", android::base::StringReplace("abcabc", "b", "foo", false));
+  ASSERT_EQ("abfooabc", android::base::StringReplace("abcabc", "c", "foo", false));
+
+  // Shorter replacement.
+  ASSERT_EQ("xxyz", android::base::StringReplace("abcxyz", "abc", "x", false));
+  ASSERT_EQ("axyz", android::base::StringReplace("abcxyz", "bcx", "x", false));
+  ASSERT_EQ("abcx", android::base::StringReplace("abcxyz", "xyz", "x", false));
+}
+
+TEST(strings, StringReplace_true) {
+  // No change.
+  ASSERT_EQ("abcabc", android::base::StringReplace("abcabc", "z", "Z", true));
+  ASSERT_EQ("", android::base::StringReplace("", "z", "Z", true));
+  ASSERT_EQ("abcabc", android::base::StringReplace("abcabc", "", "Z", true));
+
+  // Equal lengths.
+  ASSERT_EQ("AbcAbc", android::base::StringReplace("abcabc", "a", "A", true));
+  ASSERT_EQ("aBcaBc", android::base::StringReplace("abcabc", "b", "B", true));
+  ASSERT_EQ("abCabC", android::base::StringReplace("abcabc", "c", "C", true));
+
+  // Longer replacement.
+  ASSERT_EQ("foobcfoobc", android::base::StringReplace("abcabc", "a", "foo", true));
+  ASSERT_EQ("afoocafooc", android::base::StringReplace("abcabc", "b", "foo", true));
+  ASSERT_EQ("abfooabfoo", android::base::StringReplace("abcabc", "c", "foo", true));
+
+  // Shorter replacement.
+  ASSERT_EQ("xxyzx", android::base::StringReplace("abcxyzabc", "abc", "x", true));
+  ASSERT_EQ("<xx>", android::base::StringReplace("<abcabc>", "abc", "x", true));
+}
diff --git a/bootstat/bootstat.cpp b/bootstat/bootstat.cpp
index cd9fda3..d08a59f 100644
--- a/bootstat/bootstat.cpp
+++ b/bootstat/bootstat.cpp
@@ -311,6 +311,7 @@
     {"shutdown,userrequested,recovery", 182},
     {"reboot,unknown[0-9]*", 183},
     {"reboot,longkey,.*", 184},
+    {"reboot,boringssl-self-check-failed", 185},
 };
 
 // Converts a string value representing the reason the system booted to an
@@ -1093,8 +1094,8 @@
 void LogBootInfoToStatsd(std::chrono::milliseconds end_time,
                          std::chrono::milliseconds total_duration, int32_t bootloader_duration_ms,
                          double time_since_last_boot_sec) {
-  const auto reason = android::base::GetProperty(bootloader_reboot_reason_property, "<EMPTY>");
-  const auto system_reason = android::base::GetProperty(system_reboot_reason_property, "<EMPTY>");
+  auto reason = android::base::GetProperty(bootloader_reboot_reason_property, "<EMPTY>");
+  auto system_reason = android::base::GetProperty(system_reboot_reason_property, "<EMPTY>");
   android::util::stats_write(android::util::BOOT_SEQUENCE_REPORTED, reason.c_str(),
                              system_reason.c_str(), end_time.count(), total_duration.count(),
                              (int64_t)bootloader_duration_ms,
diff --git a/code_coverage/Android.mk b/code_coverage/Android.mk
new file mode 100644
index 0000000..80ab36b
--- /dev/null
+++ b/code_coverage/Android.mk
@@ -0,0 +1,37 @@
+# policies to allow processes inside minijail to dump code coverage information
+#
+
+LOCAL_PATH := $(call my-dir)
+
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := code_coverage.policy
+LOCAL_MODULE_CLASS := ETC
+LOCAL_MULTILIB := both
+
+ifeq ($(TARGET_ARCH), $(filter $(TARGET_ARCH), arm arm64))
+LOCAL_MODULE_STEM_32 := code_coverage.arm.policy
+LOCAL_MODULE_STEM_64 := code_coverage.arm64.policy
+endif
+
+ifeq ($(TARGET_ARCH), $(filter $(TARGET_ARCH), x86 x86_64))
+LOCAL_MODULE_STEM_32 := code_coverage.x86.policy
+LOCAL_MODULE_STEM_64 := code_coverage.x86_64.policy
+endif
+
+# different files for different configurations
+ifeq ($(NATIVE_COVERAGE),true)
+LOCAL_SRC_FILES_arm := seccomp_policy/code_coverage.arm.policy
+LOCAL_SRC_FILES_arm64 := seccomp_policy/code_coverage.arm64.policy
+LOCAL_SRC_FILES_x86 := seccomp_policy/code_coverage.x86.policy
+LOCAL_SRC_FILES_x86_64 := seccomp_policy/code_coverage.x86_64.policy
+else
+LOCAL_SRC_FILES_arm := empty_policy/code_coverage.arm.policy
+LOCAL_SRC_FILES_arm64 := empty_policy/code_coverage.arm64.policy
+LOCAL_SRC_FILES_x86 := empty_policy/code_coverage.x86.policy
+LOCAL_SRC_FILES_x86_64 := empty_policy/code_coverage.x86_64.policy
+endif
+
+LOCAL_MODULE_TARGET_ARCH := arm arm64 x86 x86_64
+LOCAL_MODULE_PATH := $(TARGET_OUT)/etc/seccomp_policy
+include $(BUILD_PREBUILT)
diff --git a/code_coverage/empty_policy/code_coverage.arm.policy b/code_coverage/empty_policy/code_coverage.arm.policy
new file mode 100644
index 0000000..4c9132b
--- /dev/null
+++ b/code_coverage/empty_policy/code_coverage.arm.policy
@@ -0,0 +1,2 @@
+# empty unless code_coverage is enabled.
+# code_coverage.arm.policy
diff --git a/code_coverage/empty_policy/code_coverage.arm64.policy b/code_coverage/empty_policy/code_coverage.arm64.policy
new file mode 100644
index 0000000..dc5c35a
--- /dev/null
+++ b/code_coverage/empty_policy/code_coverage.arm64.policy
@@ -0,0 +1,2 @@
+# empty unless code_coverage is enabled.
+# code_coverage.arm64.policy
diff --git a/code_coverage/empty_policy/code_coverage.x86.policy b/code_coverage/empty_policy/code_coverage.x86.policy
new file mode 100644
index 0000000..044f34c
--- /dev/null
+++ b/code_coverage/empty_policy/code_coverage.x86.policy
@@ -0,0 +1,2 @@
+# empty unless code_coverage is enabled.
+# code_coverage.x86.policy
diff --git a/code_coverage/empty_policy/code_coverage.x86_64.policy b/code_coverage/empty_policy/code_coverage.x86_64.policy
new file mode 100644
index 0000000..6dcd22d
--- /dev/null
+++ b/code_coverage/empty_policy/code_coverage.x86_64.policy
@@ -0,0 +1,2 @@
+# empty unless code_coverage is enabled.
+# code_coverage.x86_64.policy
diff --git a/code_coverage/seccomp_policy/code_coverage.arm.policy b/code_coverage/seccomp_policy/code_coverage.arm.policy
new file mode 100644
index 0000000..d6784e3
--- /dev/null
+++ b/code_coverage/seccomp_policy/code_coverage.arm.policy
@@ -0,0 +1,14 @@
+close: 1
+mkdirat: 1
+msync: 1
+munmap: 1
+openat: 1
+write: 1
+fcntl64: 1
+fstat64: 1
+geteuid32: 1
+_llseek: 1
+mmap2: 1
+sigreturn: 1
+gettimeofday: 1
+prctl: 1
diff --git a/code_coverage/seccomp_policy/code_coverage.arm64.policy b/code_coverage/seccomp_policy/code_coverage.arm64.policy
new file mode 100644
index 0000000..4c3dd26
--- /dev/null
+++ b/code_coverage/seccomp_policy/code_coverage.arm64.policy
@@ -0,0 +1,13 @@
+close: 1
+mkdirat: 1
+msync: 1
+munmap: 1
+openat: 1
+write: 1
+fcntl: 1
+fstat: 1
+geteuid: 1
+lseek: 1
+mmap: 1
+rt_sigreturn: 1
+prctl: 1
diff --git a/code_coverage/seccomp_policy/code_coverage.policy.def b/code_coverage/seccomp_policy/code_coverage.policy.def
new file mode 100644
index 0000000..f136084
--- /dev/null
+++ b/code_coverage/seccomp_policy/code_coverage.policy.def
@@ -0,0 +1,51 @@
+// SECCOMP_MODE_STRICT
+//
+// minijail allowances for code coverage
+// this is processed with generate.sh, so we can use appropriate directives
+// size specific: __LP64__ for 64 bit, else 32 bit
+// arch specific: __arm__, __aarch64__, __i386__, __x86_64__
+
+// includes *all* syscalls used during the coverage dumping
+// no skipping just because they might have been in another policy file.
+
+// coverage tool uses different operations on different passes
+// 1st: uses write() to fill the file
+// 2nd-Nth: uses mmap() to update in place
+
+close: 1
+mkdirat: 1
+msync: 1
+munmap: 1
+openat: 1
+write: 1
+
+#if     defined(__LP64__)
+fcntl: 1
+fstat: 1
+geteuid: 1
+lseek: 1
+mmap: 1
+rt_sigreturn: 1
+#else
+fcntl64: 1
+fstat64: 1
+geteuid32: 1
+_llseek: 1
+mmap2: 1
+sigreturn: 1
+#endif
+
+#if     defined(__arm__)
+gettimeofday: 1
+#endif
+
+#if     defined(__i386__)
+madvise: 1
+#endif
+
+#if     defined(__arm__)
+prctl: 1
+#elif   defined(__aarch64__)
+prctl: 1
+#endif
+
diff --git a/code_coverage/seccomp_policy/code_coverage.x86.policy b/code_coverage/seccomp_policy/code_coverage.x86.policy
new file mode 100644
index 0000000..24ff8b9
--- /dev/null
+++ b/code_coverage/seccomp_policy/code_coverage.x86.policy
@@ -0,0 +1,13 @@
+close: 1
+mkdirat: 1
+msync: 1
+munmap: 1
+openat: 1
+write: 1
+fcntl64: 1
+fstat64: 1
+geteuid32: 1
+_llseek: 1
+mmap2: 1
+sigreturn: 1
+madvise: 1
diff --git a/code_coverage/seccomp_policy/code_coverage.x86_64.policy b/code_coverage/seccomp_policy/code_coverage.x86_64.policy
new file mode 100644
index 0000000..3081036
--- /dev/null
+++ b/code_coverage/seccomp_policy/code_coverage.x86_64.policy
@@ -0,0 +1,12 @@
+close: 1
+mkdirat: 1
+msync: 1
+munmap: 1
+openat: 1
+write: 1
+fcntl: 1
+fstat: 1
+geteuid: 1
+lseek: 1
+mmap: 1
+rt_sigreturn: 1
diff --git a/code_coverage/seccomp_policy/generate.sh b/code_coverage/seccomp_policy/generate.sh
new file mode 100755
index 0000000..ae582c6
--- /dev/null
+++ b/code_coverage/seccomp_policy/generate.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# generate the arch-specific files from the generic one
+
+set -ex
+
+cd "$(dirname "$0")"
+CPP='cpp -undef -E -P code_coverage.policy.def'
+$CPP -D__arm__ -o code_coverage.arm.policy
+$CPP -D__aarch64__ -D__LP64__ -o code_coverage.arm64.policy
+$CPP -D__i386__ -o code_coverage.x86.policy
+$CPP -D__x86_64__ -D__LP64__ -o code_coverage.x86_64.policy
diff --git a/debuggerd/Android.bp b/debuggerd/Android.bp
index 2e226da..0602e0a 100644
--- a/debuggerd/Android.bp
+++ b/debuggerd/Android.bp
@@ -194,6 +194,7 @@
 cc_test {
     name: "debuggerd_test",
     defaults: ["debuggerd_defaults"],
+    require_root: true,
 
     cflags: ["-Wno-missing-field-initializers"],
     srcs: [
diff --git a/debuggerd/client/debuggerd_client.cpp b/debuggerd/client/debuggerd_client.cpp
index 1a5b435..7e35a2f 100644
--- a/debuggerd/client/debuggerd_client.cpp
+++ b/debuggerd/client/debuggerd_client.cpp
@@ -195,7 +195,10 @@
     return false;
   }
 
-  InterceptRequest req = {.pid = pid, .dump_type = dump_type};
+  InterceptRequest req = {
+      .dump_type = dump_type,
+      .pid = pid,
+  };
   if (!set_timeout(sockfd)) {
     PLOG(ERROR) << "libdebugger_client: failed to set timeout";
     return false;
diff --git a/debuggerd/client/debuggerd_client_test.cpp b/debuggerd/client/debuggerd_client_test.cpp
index 9c2f0d6..2545cd6 100644
--- a/debuggerd/client/debuggerd_client_test.cpp
+++ b/debuggerd/client/debuggerd_client_test.cpp
@@ -73,15 +73,15 @@
   unique_fd pipe_read, pipe_write;
   ASSERT_TRUE(Pipe(&pipe_read, &pipe_write));
 
-  // 64 kB should be enough for everyone.
+  // 64 MiB should be enough for everyone.
   constexpr int PIPE_SIZE = 64 * 1024 * 1024;
   ASSERT_EQ(PIPE_SIZE, fcntl(pipe_read.get(), F_SETPIPE_SZ, PIPE_SIZE));
 
   // Wait for a bit to let the child spawn all of its threads.
-  std::this_thread::sleep_for(250ms);
+  std::this_thread::sleep_for(1s);
 
   ASSERT_TRUE(
-      debuggerd_trigger_dump(forkpid, kDebuggerdNativeBacktrace, 10000, std::move(pipe_write)));
+      debuggerd_trigger_dump(forkpid, kDebuggerdNativeBacktrace, 60000, std::move(pipe_write)));
   // Immediately kill the forked child, to make sure that the dump didn't return early.
   ASSERT_EQ(0, kill(forkpid, SIGKILL)) << strerror(errno);
 
diff --git a/debuggerd/debuggerd_test.cpp b/debuggerd/debuggerd_test.cpp
index fbc8b97..99729dc 100644
--- a/debuggerd/debuggerd_test.cpp
+++ b/debuggerd/debuggerd_test.cpp
@@ -101,7 +101,10 @@
     FAIL() << "failed to contact tombstoned: " << strerror(errno);
   }
 
-  InterceptRequest req = {.pid = target_pid, .dump_type = intercept_type};
+  InterceptRequest req = {
+      .dump_type = intercept_type,
+      .pid = target_pid,
+  };
 
   unique_fd output_pipe_write;
   if (!Pipe(output_fd, &output_pipe_write)) {
@@ -176,7 +179,7 @@
   if (crasher_pid != -1) {
     kill(crasher_pid, SIGKILL);
     int status;
-    waitpid(crasher_pid, &status, WUNTRACED);
+    TEMP_FAILURE_RETRY(waitpid(crasher_pid, &status, WUNTRACED));
   }
 
   android::base::SetProperty(kWaitForGdbKey, previous_wait_for_gdb ? "1" : "0");
@@ -195,8 +198,7 @@
 void CrasherTest::FinishIntercept(int* result) {
   InterceptResponse response;
 
-  // Timeout for tombstoned intercept is 10 seconds.
-  ssize_t rc = TIMEOUT(20, read(intercept_fd.get(), &response, sizeof(response)));
+  ssize_t rc = TIMEOUT(30, read(intercept_fd.get(), &response, sizeof(response)));
   if (rc == -1) {
     FAIL() << "failed to read response from tombstoned: " << strerror(errno);
   } else if (rc == 0) {
@@ -233,7 +235,7 @@
     FAIL() << "crasher pipe uninitialized";
   }
 
-  ssize_t rc = write(crasher_pipe.get(), "\n", 1);
+  ssize_t rc = TEMP_FAILURE_RETRY(write(crasher_pipe.get(), "\n", 1));
   if (rc == -1) {
     FAIL() << "failed to write to crasher pipe: " << strerror(errno);
   } else if (rc == 0) {
@@ -243,7 +245,7 @@
 
 void CrasherTest::AssertDeath(int signo) {
   int status;
-  pid_t pid = TIMEOUT(10, waitpid(crasher_pid, &status, 0));
+  pid_t pid = TIMEOUT(30, waitpid(crasher_pid, &status, 0));
   if (pid != crasher_pid) {
     printf("failed to wait for crasher (expected pid %d, return value %d): %s\n", crasher_pid, pid,
            strerror(errno));
@@ -441,7 +443,7 @@
   FinishCrasher();
 
   int status;
-  ASSERT_EQ(crasher_pid, waitpid(crasher_pid, &status, WUNTRACED));
+  ASSERT_EQ(crasher_pid, TEMP_FAILURE_RETRY(waitpid(crasher_pid, &status, WUNTRACED)));
   ASSERT_TRUE(WIFSTOPPED(status));
   ASSERT_EQ(SIGSTOP, WSTOPSIG(status));
 
@@ -603,13 +605,15 @@
   policy += "\nclone: 1";
   policy += "\nsigaltstack: 1";
   policy += "\nnanosleep: 1";
+  policy += "\ngetrlimit: 1";
+  policy += "\nugetrlimit: 1";
 
   FILE* tmp_file = tmpfile();
   if (!tmp_file) {
     PLOG(FATAL) << "tmpfile failed";
   }
 
-  unique_fd tmp_fd(dup(fileno(tmp_file)));
+  unique_fd tmp_fd(TEMP_FAILURE_RETRY(dup(fileno(tmp_file))));
   if (!android::base::WriteStringToFd(policy, tmp_fd.get())) {
     PLOG(FATAL) << "failed to write policy to tmpfile";
   }
@@ -822,7 +826,7 @@
   FinishCrasher();
 
   int status;
-  ASSERT_EQ(crasher_pid, waitpid(crasher_pid, &status, 0));
+  ASSERT_EQ(crasher_pid, TEMP_FAILURE_RETRY(waitpid(crasher_pid, &status, 0)));
   ASSERT_TRUE(WIFSTOPPED(status));
   ASSERT_EQ(SIGABRT, WSTOPSIG(status));
 
@@ -837,7 +841,7 @@
   regex += R"( \(.+debuggerd_test)";
   ASSERT_MATCH(result, regex.c_str());
 
-  ASSERT_EQ(crasher_pid, waitpid(crasher_pid, &status, 0));
+  ASSERT_EQ(crasher_pid, TEMP_FAILURE_RETRY(waitpid(crasher_pid, &status, 0)));
   ASSERT_TRUE(WIFSTOPPED(status));
   ASSERT_EQ(SIGABRT, WSTOPSIG(status));
 
@@ -851,7 +855,7 @@
 
   StartProcess([]() {
     android_fdsan_set_error_level(ANDROID_FDSAN_ERROR_LEVEL_WARN_ONCE);
-    unique_fd fd(open("/dev/null", O_RDONLY | O_CLOEXEC));
+    unique_fd fd(TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY | O_CLOEXEC)));
     if (fd == -1) {
       abort();
     }
@@ -886,13 +890,13 @@
     raise(DEBUGGER_SIGNAL);
 
     errno = 0;
-    rc = waitpid(-1, &status, __WALL | __WNOTHREAD);
+    rc = TEMP_FAILURE_RETRY(waitpid(-1, &status, __WALL | __WNOTHREAD));
     if (rc != -1 || errno != ECHILD) {
       errx(2, "second waitpid returned %d (%s), expected failure with ECHILD", rc, strerror(errno));
     }
     _exit(0);
   } else {
-    rc = waitpid(forkpid, &status, 0);
+    rc = TEMP_FAILURE_RETRY(waitpid(forkpid, &status, 0));
     ASSERT_EQ(forkpid, rc);
     ASSERT_TRUE(WIFEXITED(status));
     ASSERT_EQ(0, WEXITSTATUS(status));
diff --git a/debuggerd/handler/debuggerd_handler.cpp b/debuggerd/handler/debuggerd_handler.cpp
index 598ea85..b90ca80 100644
--- a/debuggerd/handler/debuggerd_handler.cpp
+++ b/debuggerd/handler/debuggerd_handler.cpp
@@ -525,8 +525,8 @@
   log_signal_summary(info);
 
   debugger_thread_info thread_info = {
-      .pseudothread_tid = -1,
       .crashing_tid = __gettid(),
+      .pseudothread_tid = -1,
       .siginfo = info,
       .ucontext = context,
       .abort_msg = reinterpret_cast<uintptr_t>(abort_message),
diff --git a/debuggerd/libdebuggerd/include/libdebuggerd/utility.h b/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
index f189c45..75bac87 100644
--- a/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
+++ b/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
@@ -20,6 +20,7 @@
 
 #include <inttypes.h>
 #include <signal.h>
+#include <stdarg.h>
 #include <stdbool.h>
 #include <sys/types.h>
 
@@ -71,6 +72,7 @@
 
 // Log information onto the tombstone.
 void _LOG(log_t* log, logtype ltype, const char* fmt, ...) __attribute__((format(printf, 3, 4)));
+void _VLOG(log_t* log, logtype ltype, const char* fmt, va_list ap);
 
 namespace unwindstack {
 class Unwinder;
diff --git a/debuggerd/libdebuggerd/test/tombstone_test.cpp b/debuggerd/libdebuggerd/test/tombstone_test.cpp
index 88c206f..9dea7ac 100644
--- a/debuggerd/libdebuggerd/test/tombstone_test.cpp
+++ b/debuggerd/libdebuggerd/test/tombstone_test.cpp
@@ -345,9 +345,9 @@
 
 TEST_F(TombstoneTest, dump_thread_info_uid) {
   dump_thread_info(&log_, ThreadInfo{.uid = 1,
-                                     .pid = 2,
                                      .tid = 3,
                                      .thread_name = "some_thread",
+                                     .pid = 2,
                                      .process_name = "some_process"});
   std::string expected = "pid: 2, tid: 3, name: some_thread  >>> some_process <<<\nuid: 1\n";
   ASSERT_STREQ(expected.c_str(), amfd_data_.c_str());
diff --git a/debuggerd/libdebuggerd/tombstone.cpp b/debuggerd/libdebuggerd/tombstone.cpp
index da2ba58..236fcf7 100644
--- a/debuggerd/libdebuggerd/tombstone.cpp
+++ b/debuggerd/libdebuggerd/tombstone.cpp
@@ -428,7 +428,7 @@
   std::vector<std::pair<std::string, uint64_t>> special_row;
 
 #if defined(__arm__) || defined(__aarch64__)
-  static constexpr const char* special_registers[] = {"ip", "lr", "sp", "pc"};
+  static constexpr const char* special_registers[] = {"ip", "lr", "sp", "pc", "pst"};
 #elif defined(__i386__)
   static constexpr const char* special_registers[] = {"ebp", "esp", "eip"};
 #elif defined(__x86_64__)
@@ -595,7 +595,7 @@
       }
       AndroidLogEntry e;
       char buf[512];
-      if (android_log_processBinaryLogBuffer(&log_entry.entry_v1, &e, g_eventTagMap, buf,
+      if (android_log_processBinaryLogBuffer(&log_entry.entry, &e, g_eventTagMap, buf,
                                              sizeof(buf)) == 0) {
         _LOG(log, logtype::LOGS, "%s.%03d %5d %5d %c %-8.*s: %s\n", timeBuf,
              log_entry.entry.nsec / 1000000, log_entry.entry.pid, log_entry.entry.tid, 'I',
diff --git a/debuggerd/libdebuggerd/utility.cpp b/debuggerd/libdebuggerd/utility.cpp
index 9b2779a..5ce26fc 100644
--- a/debuggerd/libdebuggerd/utility.cpp
+++ b/debuggerd/libdebuggerd/utility.cpp
@@ -67,6 +67,14 @@
 
 __attribute__((__weak__, visibility("default")))
 void _LOG(log_t* log, enum logtype ltype, const char* fmt, ...) {
+  va_list ap;
+  va_start(ap, fmt);
+  _VLOG(log, ltype, fmt, ap);
+  va_end(ap);
+}
+
+__attribute__((__weak__, visibility("default")))
+void _VLOG(log_t* log, enum logtype ltype, const char* fmt, va_list ap) {
   bool write_to_tombstone = (log->tfd != -1);
   bool write_to_logcat = is_allowed_in_logcat(ltype)
                       && log->crashed_tid != -1
@@ -75,10 +83,7 @@
   static bool write_to_kmsg = should_write_to_kmsg();
 
   std::string msg;
-  va_list ap;
-  va_start(ap, fmt);
   android::base::StringAppendV(&msg, fmt, ap);
-  va_end(ap);
 
   if (msg.empty()) return;
 
diff --git a/debuggerd/tombstoned/tombstoned.cpp b/debuggerd/tombstoned/tombstoned.cpp
index bbeb181..d09b8e8 100644
--- a/debuggerd/tombstoned/tombstoned.cpp
+++ b/debuggerd/tombstoned/tombstoned.cpp
@@ -100,7 +100,7 @@
 
   static CrashQueue* for_tombstones() {
     static CrashQueue queue("/data/tombstones", "tombstone_" /* file_name_prefix */,
-                            GetIntProperty("tombstoned.max_tombstone_count", 10),
+                            GetIntProperty("tombstoned.max_tombstone_count", 32),
                             1 /* max_concurrent_dumps */);
     return &queue;
   }
diff --git a/debuggerd/tombstoned/tombstoned.rc b/debuggerd/tombstoned/tombstoned.rc
index 53ef01c..b4a1e71 100644
--- a/debuggerd/tombstoned/tombstoned.rc
+++ b/debuggerd/tombstoned/tombstoned.rc
@@ -2,10 +2,10 @@
     user tombstoned
     group system
 
-    # Don't start tombstoned until after the real /data is mounted.
-    class late_start
-
     socket tombstoned_crash seqpacket 0666 system system
     socket tombstoned_intercept seqpacket 0666 system system
     socket tombstoned_java_trace seqpacket 0666 system system
     writepid /dev/cpuset/system-background/tasks
+
+on post-fs-data
+    start tombstoned
diff --git a/fastboot/Android.bp b/fastboot/Android.bp
index 716fe95..a757d56 100644
--- a/fastboot/Android.bp
+++ b/fastboot/Android.bp
@@ -122,6 +122,7 @@
 
     shared_libs: [
         "android.hardware.boot@1.0",
+        "android.hardware.boot@1.1",
         "android.hardware.fastboot@1.0",
         "android.hardware.health@2.0",
         "libadbd",
@@ -134,17 +135,21 @@
         "libfs_mgr",
         "libgsi",
         "libhidlbase",
-        "libhidltransport",
-        "libhwbinder",
         "liblog",
         "liblp",
+        "libprotobuf-cpp-lite",
         "libsparse",
         "libutils",
     ],
 
     static_libs: [
         "libhealthhalutils",
+        "libsnapshot_nobinder",
     ],
+
+    header_libs: [
+        "libsnapshot_headers",
+    ]
 }
 
 cc_defaults {
@@ -187,7 +192,11 @@
     // will violate ODR.
     shared_libs: [],
 
-    header_libs: ["bootimg_headers"],
+    header_libs: [
+        "avb_headers",
+        "bootimg_headers",
+    ],
+
     static_libs: [
         "libziparchive",
         "libsparse",
diff --git a/fastboot/constants.h b/fastboot/constants.h
index 8a72627..5a554a0 100644
--- a/fastboot/constants.h
+++ b/fastboot/constants.h
@@ -34,6 +34,7 @@
 #define FB_CMD_UPDATE_SUPER "update-super"
 #define FB_CMD_OEM "oem"
 #define FB_CMD_GSI "gsi"
+#define FB_CMD_SNAPSHOT_UPDATE "snapshot-update"
 
 #define RESPONSE_OKAY "OKAY"
 #define RESPONSE_FAIL "FAIL"
@@ -66,3 +67,5 @@
 #define FB_VAR_BATTERY_VOLTAGE "battery-voltage"
 #define FB_VAR_BATTERY_SOC_OK "battery-soc-ok"
 #define FB_VAR_SUPER_PARTITION_NAME "super-partition-name"
+#define FB_VAR_SNAPSHOT_UPDATE_STATUS "snapshot-update-status"
+#define FB_VAR_CPU_ABI "cpu-abi"
diff --git a/fastboot/device/commands.cpp b/fastboot/device/commands.cpp
index 409ef70..1a745ab 100644
--- a/fastboot/device/commands.cpp
+++ b/fastboot/device/commands.cpp
@@ -19,12 +19,15 @@
 #include <sys/socket.h>
 #include <sys/un.h>
 
+#include <unordered_set>
+
 #include <android-base/logging.h>
 #include <android-base/parseint.h>
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
+#include <android/hardware/boot/1.1/IBootControl.h>
 #include <cutils/android_reboot.h>
 #include <ext4_utils/wipe.h>
 #include <fs_mgr.h>
@@ -32,6 +35,7 @@
 #include <libgsi/libgsi.h>
 #include <liblp/builder.h>
 #include <liblp/liblp.h>
+#include <libsnapshot/snapshot.h>
 #include <uuid/uuid.h>
 
 #include "constants.h"
@@ -44,8 +48,11 @@
 using ::android::hardware::boot::V1_0::BoolResult;
 using ::android::hardware::boot::V1_0::CommandResult;
 using ::android::hardware::boot::V1_0::Slot;
+using ::android::hardware::boot::V1_1::MergeStatus;
 using ::android::hardware::fastboot::V1_0::Result;
 using ::android::hardware::fastboot::V1_0::Status;
+using android::snapshot::SnapshotManager;
+using IBootControl1_1 = ::android::hardware::boot::V1_1::IBootControl;
 
 struct VariableHandlers {
     // Callback to retrieve the value of a single variable.
@@ -54,6 +61,24 @@
     std::function<std::vector<std::vector<std::string>>(FastbootDevice*)> get_all_args;
 };
 
+static bool IsSnapshotUpdateInProgress(FastbootDevice* device) {
+    auto hal = device->boot1_1();
+    if (!hal) {
+        return false;
+    }
+    auto merge_status = hal->getSnapshotMergeStatus();
+    return merge_status == MergeStatus::SNAPSHOTTED || merge_status == MergeStatus::MERGING;
+}
+
+static bool IsProtectedPartitionDuringMerge(FastbootDevice* device, const std::string& name) {
+    static const std::unordered_set<std::string> ProtectedPartitionsDuringMerge = {
+            "userdata", "metadata", "misc"};
+    if (ProtectedPartitionsDuringMerge.count(name) == 0) {
+        return false;
+    }
+    return IsSnapshotUpdateInProgress(device);
+}
+
 static void GetAllVars(FastbootDevice* device, const std::string& name,
                        const VariableHandlers& handlers) {
     if (!handlers.get_all_args) {
@@ -101,7 +126,9 @@
             {FB_VAR_BATTERY_VOLTAGE, {GetBatteryVoltage, nullptr}},
             {FB_VAR_BATTERY_SOC_OK, {GetBatterySoCOk, nullptr}},
             {FB_VAR_HW_REVISION, {GetHardwareRevision, nullptr}},
-            {FB_VAR_SUPER_PARTITION_NAME, {GetSuperPartitionName, nullptr}}};
+            {FB_VAR_SUPER_PARTITION_NAME, {GetSuperPartitionName, nullptr}},
+            {FB_VAR_SNAPSHOT_UPDATE_STATUS, {GetSnapshotUpdateStatus, nullptr}},
+            {FB_VAR_CPU_ABI, {GetCpuAbi, nullptr}}};
 
     if (args.size() < 2) {
         return device->WriteFail("Missing argument");
@@ -138,8 +165,14 @@
         return device->WriteStatus(FastbootResult::FAIL, "Erase is not allowed on locked devices");
     }
 
+    const auto& partition_name = args[1];
+    if (IsProtectedPartitionDuringMerge(device, partition_name)) {
+        auto message = "Cannot erase " + partition_name + " while a snapshot update is in progress";
+        return device->WriteFail(message);
+    }
+
     PartitionHandle handle;
-    if (!OpenPartition(device, args[1], &handle)) {
+    if (!OpenPartition(device, partition_name, &handle)) {
         return device->WriteStatus(FastbootResult::FAIL, "Partition doesn't exist");
     }
     if (wipe_block_device(handle.fd(), get_block_device_size(handle.fd())) == 0) {
@@ -194,23 +227,6 @@
     return device->WriteStatus(FastbootResult::FAIL, "Couldn't download data");
 }
 
-bool FlashHandler(FastbootDevice* device, const std::vector<std::string>& args) {
-    if (args.size() < 2) {
-        return device->WriteStatus(FastbootResult::FAIL, "Invalid arguments");
-    }
-
-    if (GetDeviceLockStatus()) {
-        return device->WriteStatus(FastbootResult::FAIL,
-                                   "Flashing is not allowed on locked devices");
-    }
-
-    int ret = Flash(device, args[1]);
-    if (ret < 0) {
-        return device->WriteStatus(FastbootResult::FAIL, strerror(-ret));
-    }
-    return device->WriteStatus(FastbootResult::OKAY, "Flashing succeeded");
-}
-
 bool SetActiveHandler(FastbootDevice* device, const std::vector<std::string>& args) {
     if (args.size() < 2) {
         return device->WriteStatus(FastbootResult::FAIL, "Missing slot argument");
@@ -221,9 +237,9 @@
                                    "set_active command is not allowed on locked devices");
     }
 
-    // Slot suffix needs to be between 'a' and 'z'.
     Slot slot;
     if (!GetSlotNumber(args[1], &slot)) {
+        // Slot suffix needs to be between 'a' and 'z'.
         return device->WriteStatus(FastbootResult::FAIL, "Bad slot suffix");
     }
 
@@ -236,6 +252,32 @@
     if (slot >= boot_control_hal->getNumberSlots()) {
         return device->WriteStatus(FastbootResult::FAIL, "Slot out of range");
     }
+
+    // If the slot is not changing, do nothing.
+    if (slot == boot_control_hal->getCurrentSlot()) {
+        return device->WriteOkay("");
+    }
+
+    // Check how to handle the current snapshot state.
+    if (auto hal11 = device->boot1_1()) {
+        auto merge_status = hal11->getSnapshotMergeStatus();
+        if (merge_status == MergeStatus::MERGING) {
+            return device->WriteFail("Cannot change slots while a snapshot update is in progress");
+        }
+        // Note: we allow the slot change if the state is SNAPSHOTTED. First-
+        // stage init does not have access to the HAL, and uses the slot number
+        // and /metadata OTA state to determine whether a slot change occurred.
+        // Booting into the old slot would erase the OTA, and switching A->B->A
+        // would simply resume it if no boots occur in between. Re-flashing
+        // partitions implicitly cancels the OTA, so leaving the state as-is is
+        // safe.
+        if (merge_status == MergeStatus::SNAPSHOTTED) {
+            device->WriteInfo(
+                    "Changing the active slot with a snapshot applied may cancel the"
+                    " update.");
+        }
+    }
+
     CommandResult ret;
     auto cb = [&ret](CommandResult result) { ret = result; };
     auto result = boot_control_hal->setActiveBootSlot(slot, cb);
@@ -440,6 +482,11 @@
     if (!partition) {
         return device->WriteFail("Partition does not exist");
     }
+
+    // Remove the updated flag to cancel any snapshots.
+    uint32_t attrs = partition->attributes();
+    partition->set_attributes(attrs & ~LP_PARTITION_ATTR_UPDATED);
+
     if (!builder->ResizePartition(partition, partition_size)) {
         return device->WriteFail("Not enough space to resize partition");
     }
@@ -449,6 +496,47 @@
     return device->WriteOkay("Partition resized");
 }
 
+void CancelPartitionSnapshot(FastbootDevice* device, const std::string& partition_name) {
+    PartitionBuilder builder(device, partition_name);
+    if (!builder.Valid()) return;
+
+    auto partition = builder->FindPartition(partition_name);
+    if (!partition) return;
+
+    // Remove the updated flag to cancel any snapshots.
+    uint32_t attrs = partition->attributes();
+    partition->set_attributes(attrs & ~LP_PARTITION_ATTR_UPDATED);
+
+    builder.Write();
+}
+
+bool FlashHandler(FastbootDevice* device, const std::vector<std::string>& args) {
+    if (args.size() < 2) {
+        return device->WriteStatus(FastbootResult::FAIL, "Invalid arguments");
+    }
+
+    if (GetDeviceLockStatus()) {
+        return device->WriteStatus(FastbootResult::FAIL,
+                                   "Flashing is not allowed on locked devices");
+    }
+
+    const auto& partition_name = args[1];
+    if (IsProtectedPartitionDuringMerge(device, partition_name)) {
+        auto message = "Cannot flash " + partition_name + " while a snapshot update is in progress";
+        return device->WriteFail(message);
+    }
+
+    if (LogicalPartitionExists(device, partition_name)) {
+        CancelPartitionSnapshot(device, partition_name);
+    }
+
+    int ret = Flash(device, partition_name);
+    if (ret < 0) {
+        return device->WriteStatus(FastbootResult::FAIL, strerror(-ret));
+    }
+    return device->WriteStatus(FastbootResult::OKAY, "Flashing succeeded");
+}
+
 bool UpdateSuperHandler(FastbootDevice* device, const std::vector<std::string>& args) {
     if (args.size() < 2) {
         return device->WriteFail("Invalid arguments");
@@ -523,3 +611,53 @@
     }
     return device->WriteStatus(FastbootResult::OKAY, "Success");
 }
+
+bool SnapshotUpdateHandler(FastbootDevice* device, const std::vector<std::string>& args) {
+    // Note that we use the HAL rather than mounting /metadata, since we want
+    // our results to match the bootloader.
+    auto hal = device->boot1_1();
+    if (!hal) return device->WriteFail("Not supported");
+
+    // If no arguments, return the same thing as a getvar. Note that we get the
+    // HAL first so we can return "not supported" before we return the less
+    // specific error message below.
+    if (args.size() < 2 || args[1].empty()) {
+        std::string message;
+        if (!GetSnapshotUpdateStatus(device, {}, &message)) {
+            return device->WriteFail("Could not determine update status");
+        }
+        device->WriteInfo(message);
+        return device->WriteOkay("");
+    }
+
+    MergeStatus status = hal->getSnapshotMergeStatus();
+
+    if (args.size() != 2) {
+        return device->WriteFail("Invalid arguments");
+    }
+    if (args[1] == "cancel") {
+        switch (status) {
+            case MergeStatus::SNAPSHOTTED:
+            case MergeStatus::MERGING:
+                hal->setSnapshotMergeStatus(MergeStatus::CANCELLED);
+                break;
+            default:
+                break;
+        }
+    } else if (args[1] == "merge") {
+        if (status != MergeStatus::MERGING) {
+            return device->WriteFail("No snapshot merge is in progress");
+        }
+
+        auto sm = SnapshotManager::NewForFirstStageMount();
+        if (!sm) {
+            return device->WriteFail("Unable to create SnapshotManager");
+        }
+        if (!sm->HandleImminentDataWipe()) {
+            return device->WriteFail("Unable to finish snapshot merge");
+        }
+    } else {
+        return device->WriteFail("Invalid parameter to snapshot-update");
+    }
+    return device->WriteStatus(FastbootResult::OKAY, "Success");
+}
diff --git a/fastboot/device/commands.h b/fastboot/device/commands.h
index afd6d08..c1324bc 100644
--- a/fastboot/device/commands.h
+++ b/fastboot/device/commands.h
@@ -19,7 +19,7 @@
 #include <string>
 #include <vector>
 
-constexpr unsigned int kMaxDownloadSizeDefault = 0x20000000;
+constexpr unsigned int kMaxDownloadSizeDefault = 0x10000000;
 
 class FastbootDevice;
 
@@ -49,3 +49,4 @@
 bool UpdateSuperHandler(FastbootDevice* device, const std::vector<std::string>& args);
 bool OemCmdHandler(FastbootDevice* device, const std::vector<std::string>& args);
 bool GsiHandler(FastbootDevice* device, const std::vector<std::string>& args);
+bool SnapshotUpdateHandler(FastbootDevice* device, const std::vector<std::string>& args);
diff --git a/fastboot/device/fastboot_device.cpp b/fastboot/device/fastboot_device.cpp
index 56fafab..31fc359 100644
--- a/fastboot/device/fastboot_device.cpp
+++ b/fastboot/device/fastboot_device.cpp
@@ -54,12 +54,17 @@
               {FB_CMD_UPDATE_SUPER, UpdateSuperHandler},
               {FB_CMD_OEM, OemCmdHandler},
               {FB_CMD_GSI, GsiHandler},
+              {FB_CMD_SNAPSHOT_UPDATE, SnapshotUpdateHandler},
       }),
       transport_(std::make_unique<ClientUsbTransport>()),
       boot_control_hal_(IBootControl::getService()),
       health_hal_(get_health_service()),
       fastboot_hal_(IFastboot::getService()),
-      active_slot_("") {}
+      active_slot_("") {
+    if (boot_control_hal_) {
+        boot1_1_ = android::hardware::boot::V1_1::IBootControl::castFrom(boot_control_hal_);
+    }
+}
 
 FastbootDevice::~FastbootDevice() {
     CloseDevice();
diff --git a/fastboot/device/fastboot_device.h b/fastboot/device/fastboot_device.h
index 091aadf..bbe8172 100644
--- a/fastboot/device/fastboot_device.h
+++ b/fastboot/device/fastboot_device.h
@@ -23,6 +23,7 @@
 #include <vector>
 
 #include <android/hardware/boot/1.0/IBootControl.h>
+#include <android/hardware/boot/1.1/IBootControl.h>
 #include <android/hardware/fastboot/1.0/IFastboot.h>
 #include <android/hardware/health/2.0/IHealth.h>
 
@@ -51,6 +52,7 @@
     android::sp<android::hardware::boot::V1_0::IBootControl> boot_control_hal() {
         return boot_control_hal_;
     }
+    android::sp<android::hardware::boot::V1_1::IBootControl> boot1_1() { return boot1_1_; }
     android::sp<android::hardware::fastboot::V1_0::IFastboot> fastboot_hal() {
         return fastboot_hal_;
     }
@@ -63,6 +65,7 @@
 
     std::unique_ptr<Transport> transport_;
     android::sp<android::hardware::boot::V1_0::IBootControl> boot_control_hal_;
+    android::sp<android::hardware::boot::V1_1::IBootControl> boot1_1_;
     android::sp<android::hardware::health::V2_0::IHealth> health_hal_;
     android::sp<android::hardware::fastboot::V1_0::IFastboot> fastboot_hal_;
     std::vector<char> download_data_;
diff --git a/fastboot/device/flashing.cpp b/fastboot/device/flashing.cpp
index 99854c9..102ebdb 100644
--- a/fastboot/device/flashing.cpp
+++ b/fastboot/device/flashing.cpp
@@ -32,6 +32,7 @@
 #include <fstab/fstab.h>
 #include <liblp/builder.h>
 #include <liblp/liblp.h>
+#include <libsnapshot/snapshot.h>
 #include <sparse/sparse.h>
 
 #include "fastboot_device.h"
@@ -171,6 +172,11 @@
         if (!slot_suffix.empty() && GetPartitionSlotSuffix(partition_name) == slot_suffix) {
             continue;
         }
+        std::string group_name = GetPartitionGroupName(old_metadata->groups[partition.group_index]);
+        // Skip partitions in the COW group
+        if (group_name == android::snapshot::kCowGroupName) {
+            continue;
+        }
         partitions_to_keep.emplace(partition_name);
     }
 
diff --git a/fastboot/device/utility.cpp b/fastboot/device/utility.cpp
index e01e39b..b3f2d5f 100644
--- a/fastboot/device/utility.cpp
+++ b/fastboot/device/utility.cpp
@@ -56,8 +56,16 @@
     if (!path) {
         return false;
     }
+
+    CreateLogicalPartitionParams params = {
+            .block_device = *path,
+            .metadata_slot = slot_number,
+            .partition_name = partition_name,
+            .force_writable = true,
+            .timeout_ms = 5s,
+    };
     std::string dm_path;
-    if (!CreateLogicalPartition(path->c_str(), slot_number, partition_name, true, 5s, &dm_path)) {
+    if (!CreateLogicalPartition(params, &dm_path)) {
         LOG(ERROR) << "Could not map partition: " << partition_name;
         return false;
     }
diff --git a/fastboot/device/variables.cpp b/fastboot/device/variables.cpp
index 130a3cf..10eac01 100644
--- a/fastboot/device/variables.cpp
+++ b/fastboot/device/variables.cpp
@@ -23,6 +23,7 @@
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
+#include <android/hardware/boot/1.1/IBootControl.h>
 #include <ext4_utils/ext4_utils.h>
 #include <fs_mgr.h>
 #include <healthhalutils/HealthHalUtils.h>
@@ -34,9 +35,11 @@
 
 using ::android::hardware::boot::V1_0::BoolResult;
 using ::android::hardware::boot::V1_0::Slot;
+using ::android::hardware::boot::V1_1::MergeStatus;
 using ::android::hardware::fastboot::V1_0::FileSystemType;
 using ::android::hardware::fastboot::V1_0::Result;
 using ::android::hardware::fastboot::V1_0::Status;
+using IBootControl1_1 = ::android::hardware::boot::V1_1::IBootControl;
 using namespace android::fs_mgr;
 
 constexpr char kFastbootProtocolVersion[] = "0.4";
@@ -424,3 +427,34 @@
     *message = fs_mgr_get_super_partition_name(slot_number);
     return true;
 }
+
+bool GetSnapshotUpdateStatus(FastbootDevice* device, const std::vector<std::string>& /* args */,
+                             std::string* message) {
+    // Note that we use the HAL rather than mounting /metadata, since we want
+    // our results to match the bootloader.
+    auto hal = device->boot1_1();
+    if (!hal) {
+        *message = "not supported";
+        return false;
+    }
+
+    MergeStatus status = hal->getSnapshotMergeStatus();
+    switch (status) {
+        case MergeStatus::SNAPSHOTTED:
+            *message = "snapshotted";
+            break;
+        case MergeStatus::MERGING:
+            *message = "merging";
+            break;
+        default:
+            *message = "none";
+            break;
+    }
+    return true;
+}
+
+bool GetCpuAbi(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+               std::string* message) {
+    *message = android::base::GetProperty("ro.product.cpu.abi", "");
+    return true;
+}
diff --git a/fastboot/device/variables.h b/fastboot/device/variables.h
index 015a4c5..90840d6 100644
--- a/fastboot/device/variables.h
+++ b/fastboot/device/variables.h
@@ -61,6 +61,9 @@
                      std::string* message);
 bool GetSuperPartitionName(FastbootDevice* device, const std::vector<std::string>& args,
                            std::string* message);
+bool GetSnapshotUpdateStatus(FastbootDevice* device, const std::vector<std::string>& args,
+                             std::string* message);
+bool GetCpuAbi(FastbootDevice* device, const std::vector<std::string>& args, std::string* message);
 
 // Helpers for getvar all.
 std::vector<std::vector<std::string>> GetAllPartitionArgsWithSlot(FastbootDevice* device);
diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index 8923f40..cbd42b1 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -51,6 +51,7 @@
 #include <utility>
 #include <vector>
 
+#include <android-base/endian.h>
 #include <android-base/file.h>
 #include <android-base/macros.h>
 #include <android-base/parseint.h>
@@ -59,6 +60,7 @@
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
 #include <build/version.h>
+#include <libavb/libavb.h>
 #include <liblp/liblp.h>
 #include <platform_tools_version.h>
 #include <sparse/sparse.h>
@@ -160,6 +162,10 @@
                                                       "vbmeta_system",
                                                                   true,  ImageType::BootCritical },
     { "vendor",   "vendor.img",       "vendor.sig",   "vendor",   true,  ImageType::Normal },
+    { "vendor_boot",
+                  "vendor_boot.img",  "vendor_boot.sig",
+                                                      "vendor_boot",
+                                                                  true,  ImageType::BootCritical },
     { nullptr,    "vendor_other.img", "vendor.sig",   "vendor",   true,  ImageType::Normal },
         // clang-format on
 };
@@ -390,6 +396,12 @@
             " gsi wipe|disable           Wipe or disable a GSI installation (fastbootd only).\n"
             " wipe-super [SUPER_EMPTY]   Wipe the super partition. This will reset it to\n"
             "                            contain an empty set of default dynamic partitions.\n"
+            " snapshot-update cancel     On devices that support snapshot-based updates, cancel\n"
+            "                            an in-progress update. This may make the device\n"
+            "                            unbootable until it is reflashed.\n"
+            " snapshot-update merge      On devices that support snapshot-based updates, finish\n"
+            "                            an in-progress update if it is in the \"merging\"\n"
+            "                            phase.\n"
             "\n"
             "boot image:\n"
             " boot KERNEL [RAMDISK [SECOND]]\n"
@@ -870,7 +882,7 @@
         return false;
     }
 
-    if (sparse_file* s = sparse_file_import_auto(fd, false, false)) {
+    if (sparse_file* s = sparse_file_import(fd, false, false)) {
         buf->image_size = sparse_file_len(s, false, false);
         sparse_file_destroy(s);
     } else {
@@ -915,33 +927,50 @@
     return load_buf_fd(fd.release(), buf);
 }
 
-static void rewrite_vbmeta_buffer(struct fastboot_buffer* buf) {
+static void rewrite_vbmeta_buffer(struct fastboot_buffer* buf, bool vbmeta_in_boot) {
     // Buffer needs to be at least the size of the VBMeta struct which
     // is 256 bytes.
     if (buf->sz < 256) {
         return;
     }
 
-    int fd = make_temporary_fd("vbmeta rewriting");
-
     std::string data;
     if (!android::base::ReadFdToString(buf->fd, &data)) {
         die("Failed reading from vbmeta");
     }
 
+    uint64_t vbmeta_offset = 0;
+    if (vbmeta_in_boot) {
+        // Tries to locate top-level vbmeta from boot.img footer.
+        uint64_t footer_offset = buf->sz - AVB_FOOTER_SIZE;
+        if (0 != data.compare(footer_offset, AVB_FOOTER_MAGIC_LEN, AVB_FOOTER_MAGIC)) {
+            die("Failed to find AVB_FOOTER at offset: %" PRId64, footer_offset);
+        }
+        const AvbFooter* footer = reinterpret_cast<const AvbFooter*>(data.c_str() + footer_offset);
+        vbmeta_offset = be64toh(footer->vbmeta_offset);
+    }
+    // Ensures there is AVB_MAGIC at vbmeta_offset.
+    if (0 != data.compare(vbmeta_offset, AVB_MAGIC_LEN, AVB_MAGIC)) {
+        die("Failed to find AVB_MAGIC at offset: %" PRId64, vbmeta_offset);
+    }
+
+    fprintf(stderr, "Rewriting vbmeta struct at offset: %" PRId64 "\n", vbmeta_offset);
+
     // There's a 32-bit big endian |flags| field at offset 120 where
     // bit 0 corresponds to disable-verity and bit 1 corresponds to
     // disable-verification.
     //
     // See external/avb/libavb/avb_vbmeta_image.h for the layout of
     // the VBMeta struct.
+    uint64_t flags_offset = 123 + vbmeta_offset;
     if (g_disable_verity) {
-        data[123] |= 0x01;
+        data[flags_offset] |= 0x01;
     }
     if (g_disable_verification) {
-        data[123] |= 0x02;
+        data[flags_offset] |= 0x02;
     }
 
+    int fd = make_temporary_fd("vbmeta rewriting");
     if (!android::base::WriteStringToFd(data, fd)) {
         die("Failed writing to modified vbmeta");
     }
@@ -950,14 +979,25 @@
     lseek(fd, 0, SEEK_SET);
 }
 
+static bool has_vbmeta_partition() {
+    std::string partition_type;
+    return fb->GetVar("partition-type:vbmeta", &partition_type) == fastboot::SUCCESS ||
+           fb->GetVar("partition-type:vbmeta_a", &partition_type) == fastboot::SUCCESS ||
+           fb->GetVar("partition-type:vbmeta_b", &partition_type) == fastboot::SUCCESS;
+}
+
 static void flash_buf(const std::string& partition, struct fastboot_buffer *buf)
 {
     sparse_file** s;
 
     // Rewrite vbmeta if that's what we're flashing and modification has been requested.
-    if ((g_disable_verity || g_disable_verification) &&
-        (partition == "vbmeta" || partition == "vbmeta_a" || partition == "vbmeta_b")) {
-        rewrite_vbmeta_buffer(buf);
+    if (g_disable_verity || g_disable_verification) {
+        if (partition == "vbmeta" || partition == "vbmeta_a" || partition == "vbmeta_b") {
+            rewrite_vbmeta_buffer(buf, false /* vbmeta_in_boot */);
+        } else if (!has_vbmeta_partition() &&
+                   (partition == "boot" || partition == "boot_a" || partition == "boot_b")) {
+            rewrite_vbmeta_buffer(buf, true /* vbmeta_in_boot */ );
+        }
     }
 
     switch (buf->type) {
@@ -1182,6 +1222,14 @@
     target_sparse_limit = -1;
 }
 
+static void CancelSnapshotIfNeeded() {
+    std::string merge_status = "none";
+    if (fb->GetVar(FB_VAR_SNAPSHOT_UPDATE_STATUS, &merge_status) == fastboot::SUCCESS &&
+        merge_status != "none") {
+        fb->SnapshotUpdateCommand("Cancel");
+    }
+}
+
 class ImageSource {
   public:
     virtual bool ReadFile(const std::string& name, std::vector<char>* out) const = 0;
@@ -1234,6 +1282,8 @@
     DetermineSecondarySlot();
     CollectImages();
 
+    CancelSnapshotIfNeeded();
+
     // First flash boot partitions. We allow this to happen either in userspace
     // or in bootloader fastboot.
     FlashImages(boot_images_);
@@ -2037,12 +2087,24 @@
                 image = next_arg(&args);
             }
             do_wipe_super(image, slot_override);
+        } else if (command == "snapshot-update") {
+            std::string arg;
+            if (!args.empty()) {
+                arg = next_arg(&args);
+            }
+            if (!arg.empty() && (arg != "cancel" && arg != "merge")) {
+                syntax_error("expected: snapshot-update [cancel|merge]");
+            }
+            fb->SnapshotUpdateCommand(arg);
         } else {
             syntax_error("unknown command %s", command.c_str());
         }
     }
 
     if (wants_wipe) {
+        if (force_flash) {
+            CancelSnapshotIfNeeded();
+        }
         std::vector<std::string> partitions = { "userdata", "cache", "metadata" };
         for (const auto& partition : partitions) {
             std::string partition_type;
@@ -2054,10 +2116,10 @@
             if (partition == "userdata" && set_fbe_marker) {
                 fprintf(stderr, "setting FBE marker on initial userdata...\n");
                 std::string initial_userdata_dir = create_fbemarker_tmpdir();
-                fb_perform_format(partition, 1, "", "", initial_userdata_dir);
+                fb_perform_format(partition, 1, partition_type, "", initial_userdata_dir);
                 delete_fbemarker_tmpdir(initial_userdata_dir);
             } else {
-                fb_perform_format(partition, 1, "", "", "");
+                fb_perform_format(partition, 1, partition_type, "", "");
             }
         }
     }
diff --git a/fastboot/fastboot_driver.cpp b/fastboot/fastboot_driver.cpp
index fea0a77..8d534ea 100644
--- a/fastboot/fastboot_driver.cpp
+++ b/fastboot/fastboot_driver.cpp
@@ -122,6 +122,15 @@
                       response, info);
 }
 
+RetCode FastBootDriver::SnapshotUpdateCommand(const std::string& command, std::string* response,
+                                              std::vector<std::string>* info) {
+    prolog_(StringPrintf("Snapshot %s", command.c_str()));
+    std::string raw = FB_CMD_SNAPSHOT_UPDATE ":" + command;
+    auto result = RawCommand(raw, response, info);
+    epilog_(result);
+    return result;
+}
+
 RetCode FastBootDriver::FlashPartition(const std::string& partition,
                                        const std::vector<char>& data) {
     RetCode ret;
@@ -291,7 +300,7 @@
 RetCode FastBootDriver::UploadInner(const std::string& outfile, std::string* response,
                                     std::vector<std::string>* info) {
     RetCode ret;
-    int dsize;
+    int dsize = 0;
     if ((ret = RawCommand(FB_CMD_UPLOAD, response, info, &dsize))) {
         error_ = "Upload request failed: " + error_;
         return ret;
diff --git a/fastboot/fastboot_driver.h b/fastboot/fastboot_driver.h
index af02637..7265632 100644
--- a/fastboot/fastboot_driver.h
+++ b/fastboot/fastboot_driver.h
@@ -104,6 +104,8 @@
                       std::vector<std::string>* info = nullptr);
     RetCode Upload(const std::string& outfile, std::string* response = nullptr,
                    std::vector<std::string>* info = nullptr);
+    RetCode SnapshotUpdateCommand(const std::string& command, std::string* response = nullptr,
+                                  std::vector<std::string>* info = nullptr);
 
     /* HIGHER LEVEL COMMANDS -- Composed of the commands above */
     RetCode FlashPartition(const std::string& partition, const std::vector<char>& data);
diff --git a/fs_mgr/Android.bp b/fs_mgr/Android.bp
index 65f0eff..eb737bb 100644
--- a/fs_mgr/Android.bp
+++ b/fs_mgr/Android.bp
@@ -74,6 +74,7 @@
         "liblogwrap",
         "libdm",
         "libext2_uuid",
+        "libfscrypt",
         "libfstab",
     ],
     cppflags: [
diff --git a/fs_mgr/README.overlayfs.md b/fs_mgr/README.overlayfs.md
index fe2e052..f579078 100644
--- a/fs_mgr/README.overlayfs.md
+++ b/fs_mgr/README.overlayfs.md
@@ -1,33 +1,27 @@
-Android Overlayfs integration with adb remount
+Android OverlayFS Integration with adb Remount
 ==============================================
 
 Introduction
 ------------
 
-Users working with userdebug or eng builds expect to be able to
-remount the system partition as read-write and then add or modify
-any number of files without reflashing the system image, which is
-understandably efficient for a development cycle.
-Limited memory systems that chose to use readonly filesystems like
-*squashfs*, or *Logical Resizable Android Partitions* which land
-system partition images right-sized, and with filesystem that have
-been deduped on the block level to compress the content; means that
-either a remount is not possible directly, or when done offers
-little or no utility because of remaining space limitations or
-support logistics.
+Users working with userdebug or eng builds expect to be able to remount the
+system partition as read-write and then add or modify any number of files
+without reflashing the system image, which is efficient for a development cycle.
 
-*Overlayfs* comes to the rescue for these debug scenarios, and logic
-will _automatically_ setup backing storage for a writable filesystem
-as an upper reference, and mount overtop the lower.  These actions
-will be performed in the **adb disable-verity** and **adb remount**
-requests.
+Limited memory systems use read-only types of file systems or logical resizable
+Android partitions (LRAPs). These file systems land system partition images
+right-sized, and have been deduped at the block level to compress the content.
+This means that a remount either isn’t possible, or isn't useful because of
+space limitations or support logistics.
 
-Operations
-----------
+OverlayFS resolves these debug scenarios with the _adb disable-verity_ and
+_adb remount_ commands, which set up backing storage for a writable file
+system as an upper reference, and mount the lower reference on top.
 
-### Cookbook
+Performing a remount
+--------------------
 
-The typical action to utilize the remount facility is:
+Use the following sequence to perform the remount.
 
     $ adb root
     $ adb disable-verity
@@ -36,11 +30,11 @@
     $ adb root
     $ adb remount
 
-Followed by one of the following:
+Then enter one of the following sequences:
 
-    $ adb stop
+    $ adb shell stop
     $ adb sync
-    $ adb start
+    $ adb shell start
     $ adb reboot
 
 *or*
@@ -48,75 +42,67 @@
     $ adb push <source> <destination>
     $ adb reboot
 
-Note that the sequence above:
+Note that you can replace these two lines:
 
     $ adb disable-verity
     $ adb reboot
 
-*or*
-
-    $ adb remount
-
-can be replaced in both places with:
+with this line:
 
     $ adb remount -R
 
-which will not reboot if everything is already prepared and ready
-to go.
+**Note:** _adb reboot -R_ won’t reboot if the device is already in the adb remount state.
 
-None of this changes if *overlayfs* needs to be engaged.
-The decisions whether to use traditional direct filesystem remount,
-or one wrapped by *overlayfs* is automatically determined based on
-a probe of the filesystem types and space remaining.
+None of this changes if OverlayFS needs to be engaged.
+The decisions whether to use traditional direct file-system remount,
+or one wrapped by OverlayFS is automatically determined based on
+a probe of the file-system types and space remaining.
 
 ### Backing Storage
 
-When *overlayfs* logic is feasible, it will use either the
+When *OverlayFS* logic is feasible, it uses either the
 **/cache/overlay/** directory for non-A/B devices, or the
 **/mnt/scratch/overlay** directory for A/B devices that have
-access to *Logical Resizable Android Partitions*.
+access to *LRAP*.
+It is also possible for an A/B device to use the system_<other> partition
+for backing storage. eg: if booting off system_a+vendor_a, use system_b.
 The backing store is used as soon as possible in the boot
-process and can occur at first stage init, or at the
-mount_all init rc commands.
+process and can occur at first stage init, or when the
+*mount_all* commands are run in init RC scripts.
 
-This early as possible attachment of *overlayfs* means that
-*sepolicy* or *init* itself can also be pushed and used after
-the exec phases that accompany each stage.
+By attaching OverlayFS early, SEpolicy or init can be pushed and used after the exec phases of each stage.
 
 Caveats
 -------
 
-- Space used in the backing storage is on a file by file basis
-  and will require more space than if updated in place.  As such
-  it is important to be mindful of any wasted space, for instance
-  **BOARD_<partition>IMAGE_PARTITION_RESERVED_SIZE** being defined
-  will have a negative impact on the overall right-sizing of images
-  and thus free dynamic partition space.
-- Kernel must have CONFIG_OVERLAY_FS=y and will need to be patched
-  with "*overlayfs: override_creds=off option bypass creator_cred*"
-  if kernel is 4.4 or higher.
+- Backing storage requires more space than immutable storage, as backing is
+  done file by file. Be mindful of wasted space. For example, defining
+  **BOARD_IMAGE_PARTITION_RESERVED_SIZE** has a negative impact on the
+  right-sizing of images and requires more free dynamic partition space.
+- The kernel requires **CONFIG_OVERLAY_FS=y**. If the kernel version is higher
+  than 4.4, it requires source to be in line with android-common kernels. 
   The patch series is available on the upstream mailing list and the latest as
-  of Jul 24 2019 is https://lore.kernel.org/patchwork/patch/1104577/.
-  This patch adds an override_creds _mount_ option to overlayfs that
+  of Sep 5 2019 is https://www.spinics.net/lists/linux-mtd/msg08331.html
+  This patch adds an override_creds _mount_ option to OverlayFS that
   permits legacy behavior for systems that do not have overlapping
   sepolicy rules, principals of least privilege, which is how Android behaves.
-- *adb enable-verity* will free up overlayfs and as a bonus the
-  device will be reverted pristine to before any content was updated.
-  Update engine does not take advantage of this, will perform a full OTA.
-- Update engine may not run if *fs_mgr_overlayfs_is_setup*() reports
-  true as adb remount overrides are incompatible with an OTA resources.
+  For 4.19 and higher a rework of the xattr handling to deal with recursion
+  is required. https://patchwork.kernel.org/patch/11117145/ is a start of that
+  adjustment.
+- _adb enable-verity_ frees up OverlayFS and reverts the device to the state
+  prior to content updates. The update engine performs a full OTA.
+- _adb remount_ overrides are incompatible with OTA resources, so the update
+  engine may not run if fs_mgr_overlayfs_is_setup() returns true.
+- If a dynamic partition runs out of space, making a logical partition larger
+  may fail because of the scratch partition. If this happens, clear the scratch
+  storage by running either either _fastboot flashall_ or _adb enable-verity_.
+  Then reinstate the overrides and continue.
 - For implementation simplicity on retrofit dynamic partition devices,
   take the whole alternate super (eg: if "*a*" slot, then the whole of
   "*system_b*").
   Since landing a filesystem on the alternate super physical device
   without differentiating if it is setup to support logical or physical,
   the alternate slot metadata and previous content will be lost.
-- If dynamic partitions runs out of space, resizing a logical
-  partition larger may fail because of the scratch partition.
-  If this happens, either fastboot flashall or adb enable-verity can
-  be used to clear scratch storage to permit the flash.
-  Then reinstate the overrides and continue.
-- File bugs or submit fixes for review.
 - There are other subtle caveats requiring complex logic to solve.
   Have evaluated them as too complex or not worth the trouble, please
   File a bug if a use case needs to be covered.
@@ -125,7 +111,7 @@
     out and we reserve the right to not inform, if the layering
     does not prevent any messaging.
   - Space remaining threshold is hard coded.  If 1% or more space
-    still remains, overlayfs will not be used, yet that amount of
+    still remains, OverlayFS will not be used, yet that amount of
     space remaining is problematic.
   - Flashing a partition via bootloader fastboot, as opposed to user
     space fastbootd, is not detected, thus a partition may have
@@ -139,3 +125,4 @@
     to confusion.  When debugging using **adb remount** it is
     currently advised to confirm update is present after a reboot
     to develop confidence.
+- File bugs or submit fixes for review.
diff --git a/fs_mgr/fs_mgr.cpp b/fs_mgr/fs_mgr.cpp
index 7a0d019..7b686f0 100644
--- a/fs_mgr/fs_mgr.cpp
+++ b/fs_mgr/fs_mgr.cpp
@@ -58,6 +58,7 @@
 #include <fs_avb/fs_avb.h>
 #include <fs_mgr/file_wait.h>
 #include <fs_mgr_overlayfs.h>
+#include <fscrypt/fscrypt.h>
 #include <libdm/dm.h>
 #include <liblp/metadata_format.h>
 #include <linux/fs.h>
@@ -84,9 +85,13 @@
 
 #define SYSFS_EXT4_VERITY "/sys/fs/ext4/features/verity"
 
+// FIXME: this should be in system/extras
+#define EXT4_FEATURE_COMPAT_STABLE_INODES 0x0800
+
 #define ARRAY_SIZE(a) (sizeof(a) / sizeof(*(a)))
 
 using android::base::Basename;
+using android::base::GetBoolProperty;
 using android::base::Realpath;
 using android::base::StartsWith;
 using android::base::unique_fd;
@@ -222,13 +227,11 @@
         } else {
             LINFO << "Running " << E2FSCK_BIN << " on " << realpath(blk_device);
             if (should_force_check(*fs_stat)) {
-                ret = android_fork_execvp_ext(
-                    ARRAY_SIZE(e2fsck_forced_argv), const_cast<char**>(e2fsck_forced_argv), &status,
-                    true, LOG_KLOG | LOG_FILE, true, const_cast<char*>(FSCK_LOG_FILE), nullptr, 0);
+                ret = logwrap_fork_execvp(ARRAY_SIZE(e2fsck_forced_argv), e2fsck_forced_argv,
+                                          &status, false, LOG_KLOG | LOG_FILE, true, FSCK_LOG_FILE);
             } else {
-                ret = android_fork_execvp_ext(
-                    ARRAY_SIZE(e2fsck_argv), const_cast<char**>(e2fsck_argv), &status, true,
-                    LOG_KLOG | LOG_FILE, true, const_cast<char*>(FSCK_LOG_FILE), nullptr, 0);
+                ret = logwrap_fork_execvp(ARRAY_SIZE(e2fsck_argv), e2fsck_argv, &status, false,
+                                          LOG_KLOG | LOG_FILE, true, FSCK_LOG_FILE);
             }
 
             if (ret < 0) {
@@ -246,14 +249,12 @@
 
         if (should_force_check(*fs_stat)) {
             LINFO << "Running " << F2FS_FSCK_BIN << " -f " << realpath(blk_device);
-            ret = android_fork_execvp_ext(
-                ARRAY_SIZE(f2fs_fsck_forced_argv), const_cast<char**>(f2fs_fsck_forced_argv), &status,
-                true, LOG_KLOG | LOG_FILE, true, const_cast<char*>(FSCK_LOG_FILE), nullptr, 0);
+            ret = logwrap_fork_execvp(ARRAY_SIZE(f2fs_fsck_forced_argv), f2fs_fsck_forced_argv,
+                                      &status, false, LOG_KLOG | LOG_FILE, true, FSCK_LOG_FILE);
         } else {
             LINFO << "Running " << F2FS_FSCK_BIN << " -a " << realpath(blk_device);
-            ret = android_fork_execvp_ext(
-                ARRAY_SIZE(f2fs_fsck_argv), const_cast<char**>(f2fs_fsck_argv), &status, true,
-                LOG_KLOG | LOG_FILE, true, const_cast<char*>(FSCK_LOG_FILE), nullptr, 0);
+            ret = logwrap_fork_execvp(ARRAY_SIZE(f2fs_fsck_argv), f2fs_fsck_argv, &status, false,
+                                      LOG_KLOG | LOG_FILE, true, FSCK_LOG_FILE);
         }
         if (ret < 0) {
             /* No need to check for error in fork, we can't really handle it now */
@@ -331,8 +332,7 @@
 static bool run_tune2fs(const char* argv[], int argc) {
     int ret;
 
-    ret = android_fork_execvp_ext(argc, const_cast<char**>(argv), nullptr, true,
-                                  LOG_KLOG | LOG_FILE, true, nullptr, nullptr, 0);
+    ret = logwrap_fork_execvp(argc, argv, nullptr, false, LOG_KLOG, true, nullptr);
     return ret == 0;
 }
 
@@ -417,25 +417,43 @@
 // Enable file-based encryption if needed.
 static void tune_encrypt(const std::string& blk_device, const FstabEntry& entry,
                          const struct ext4_super_block* sb, int* fs_stat) {
-    bool has_encrypt = (sb->s_feature_incompat & cpu_to_le32(EXT4_FEATURE_INCOMPAT_ENCRYPT)) != 0;
-    bool want_encrypt = entry.fs_mgr_flags.file_encryption;
-
-    if (has_encrypt || !want_encrypt) {
+    if (!entry.fs_mgr_flags.file_encryption) {
+        return;  // Nothing needs done.
+    }
+    std::vector<std::string> features_needed;
+    if ((sb->s_feature_incompat & cpu_to_le32(EXT4_FEATURE_INCOMPAT_ENCRYPT)) == 0) {
+        features_needed.emplace_back("encrypt");
+    }
+    android::fscrypt::EncryptionOptions options;
+    if (!android::fscrypt::ParseOptions(entry.encryption_options, &options)) {
+        LERROR << "Unable to parse encryption options on " << blk_device << ": "
+               << entry.encryption_options;
         return;
     }
-
+    if ((options.flags & FSCRYPT_POLICY_FLAG_IV_INO_LBLK_64) != 0) {
+        // We can only use this policy on ext4 if the "stable_inodes" feature
+        // is set on the filesystem, otherwise shrinking will break encrypted files.
+        if ((sb->s_feature_compat & cpu_to_le32(EXT4_FEATURE_COMPAT_STABLE_INODES)) == 0) {
+            features_needed.emplace_back("stable_inodes");
+        }
+    }
+    if (features_needed.size() == 0) {
+        return;
+    }
     if (!tune2fs_available()) {
         LERROR << "Unable to enable ext4 encryption on " << blk_device
                << " because " TUNE2FS_BIN " is missing";
         return;
     }
 
-    const char* argv[] = {TUNE2FS_BIN, "-Oencrypt", blk_device.c_str()};
+    auto flags = android::base::Join(features_needed, ',');
+    auto flag_arg = "-O"s + flags;
+    const char* argv[] = {TUNE2FS_BIN, flag_arg.c_str(), blk_device.c_str()};
 
-    LINFO << "Enabling ext4 encryption on " << blk_device;
+    LINFO << "Enabling ext4 flags " << flags << " on " << blk_device;
     if (!run_tune2fs(argv, ARRAY_SIZE(argv))) {
         LERROR << "Failed to run " TUNE2FS_BIN " to enable "
-               << "ext4 encryption on " << blk_device;
+               << "ext4 flags " << flags << " on " << blk_device;
         *fs_stat |= FS_STAT_ENABLE_ENCRYPTION_FAILED;
     }
 }
@@ -852,37 +870,22 @@
     }
 }
 
-static bool call_vdc(const std::vector<std::string>& args) {
+static bool call_vdc(const std::vector<std::string>& args, int* ret) {
     std::vector<char const*> argv;
     argv.emplace_back("/system/bin/vdc");
     for (auto& arg : args) {
         argv.emplace_back(arg.c_str());
     }
     LOG(INFO) << "Calling: " << android::base::Join(argv, ' ');
-    int ret =
-            android_fork_execvp(argv.size(), const_cast<char**>(argv.data()), nullptr, false, true);
-    if (ret != 0) {
-        LOG(ERROR) << "vdc returned error code: " << ret;
-        return false;
-    }
-    LOG(DEBUG) << "vdc finished successfully";
-    return true;
-}
-
-static bool call_vdc_ret(const std::vector<std::string>& args, int* ret) {
-    std::vector<char const*> argv;
-    argv.emplace_back("/system/bin/vdc");
-    for (auto& arg : args) {
-        argv.emplace_back(arg.c_str());
-    }
-    LOG(INFO) << "Calling: " << android::base::Join(argv, ' ');
-    int err = android_fork_execvp(argv.size(), const_cast<char**>(argv.data()), ret, false, true);
+    int err = logwrap_fork_execvp(argv.size(), argv.data(), ret, false, LOG_ALOG, false, nullptr);
     if (err != 0) {
         LOG(ERROR) << "vdc call failed with error code: " << err;
         return false;
     }
     LOG(DEBUG) << "vdc finished successfully";
-    *ret = WEXITSTATUS(*ret);
+    if (ret != nullptr) {
+        *ret = WEXITSTATUS(*ret);
+    }
     return true;
 }
 
@@ -908,22 +911,27 @@
   public:
     CheckpointManager(int needs_checkpoint = -1) : needs_checkpoint_(needs_checkpoint) {}
 
+    bool NeedsCheckpoint() {
+        if (needs_checkpoint_ != UNKNOWN) {
+            return needs_checkpoint_ == YES;
+        }
+        if (!call_vdc({"checkpoint", "needsCheckpoint"}, &needs_checkpoint_)) {
+            LERROR << "Failed to find if checkpointing is needed. Assuming no.";
+            needs_checkpoint_ = NO;
+        }
+        return needs_checkpoint_ == YES;
+    }
+
     bool Update(FstabEntry* entry, const std::string& block_device = std::string()) {
         if (!entry->fs_mgr_flags.checkpoint_blk && !entry->fs_mgr_flags.checkpoint_fs) {
             return true;
         }
 
         if (entry->fs_mgr_flags.checkpoint_blk) {
-            call_vdc({"checkpoint", "restoreCheckpoint", entry->blk_device});
+            call_vdc({"checkpoint", "restoreCheckpoint", entry->blk_device}, nullptr);
         }
 
-        if (needs_checkpoint_ == UNKNOWN &&
-            !call_vdc_ret({"checkpoint", "needsCheckpoint"}, &needs_checkpoint_)) {
-            LERROR << "Failed to find if checkpointing is needed. Assuming no.";
-            needs_checkpoint_ = NO;
-        }
-
-        if (needs_checkpoint_ != YES) {
+        if (!NeedsCheckpoint()) {
             return true;
         }
 
@@ -1111,6 +1119,12 @@
             continue;
         }
 
+        // Terrible hack to make it possible to remount /data.
+        // TODO: refact fs_mgr_mount_all and get rid of this.
+        if (mount_mode == MOUNT_MODE_ONLY_USERDATA && current_entry.mount_point != "/data") {
+            continue;
+        }
+
         // Translate LABEL= file system labels into block devices.
         if (is_extfs(current_entry.fs_type)) {
             if (!TranslateExtLabels(&current_entry)) {
@@ -1193,7 +1207,8 @@
                 encryptable = status;
                 if (status == FS_MGR_MNTALL_DEV_NEEDS_METADATA_ENCRYPTION) {
                     if (!call_vdc({"cryptfs", "encryptFstab", attempted_entry.blk_device,
-                                   attempted_entry.mount_point})) {
+                                   attempted_entry.mount_point},
+                                  nullptr)) {
                         LERROR << "Encryption failed";
                         return FS_MGR_MNTALL_FAIL;
                     }
@@ -1265,7 +1280,8 @@
         } else if (mount_errno != EBUSY && mount_errno != EACCES &&
                    should_use_metadata_encryption(attempted_entry)) {
             if (!call_vdc({"cryptfs", "mountFstab", attempted_entry.blk_device,
-                           attempted_entry.mount_point})) {
+                           attempted_entry.mount_point},
+                          nullptr)) {
                 ++error_count;
             }
             encryptable = FS_MGR_MNTALL_DEV_IS_METADATA_ENCRYPTED;
@@ -1342,6 +1358,85 @@
     return ret;
 }
 
+static std::string GetBlockDeviceForMountPoint(const std::string& mount_point) {
+    Fstab mounts;
+    if (!ReadFstabFromFile("/proc/mounts", &mounts)) {
+        LERROR << "Can't read /proc/mounts";
+        return "";
+    }
+    auto entry = GetEntryForMountPoint(&mounts, mount_point);
+    if (entry == nullptr) {
+        LWARNING << mount_point << " is not mounted";
+        return "";
+    }
+    return entry->blk_device;
+}
+
+// TODO(b/143970043): return different error codes based on which step failed.
+int fs_mgr_remount_userdata_into_checkpointing(Fstab* fstab) {
+    std::string block_device = GetBlockDeviceForMountPoint("/data");
+    if (block_device.empty()) {
+        LERROR << "/data is not mounted";
+        return -1;
+    }
+    auto fstab_entry = GetMountedEntryForUserdata(fstab);
+    if (fstab_entry == nullptr) {
+        LERROR << "Can't find /data in fstab";
+        return -1;
+    }
+    if (!fstab_entry->fs_mgr_flags.checkpoint_blk && !fstab_entry->fs_mgr_flags.checkpoint_fs) {
+        LINFO << "Userdata doesn't support checkpointing. Nothing to do";
+        return 0;
+    }
+    CheckpointManager checkpoint_manager;
+    if (!checkpoint_manager.NeedsCheckpoint()) {
+        LINFO << "Checkpointing not needed. Don't remount";
+        return 0;
+    }
+    bool force_umount_for_f2fs =
+            GetBoolProperty("sys.init.userdata_remount.force_umount_f2fs", false);
+    if (fstab_entry->fs_mgr_flags.checkpoint_fs && !force_umount_for_f2fs) {
+        // Userdata is f2fs, simply remount it.
+        if (!checkpoint_manager.Update(fstab_entry)) {
+            LERROR << "Failed to remount userdata in checkpointing mode";
+            return -1;
+        }
+        if (mount(block_device.c_str(), fstab_entry->mount_point.c_str(), "none",
+                  MS_REMOUNT | fstab_entry->flags, fstab_entry->fs_options.c_str()) != 0) {
+            PERROR << "Failed to remount userdata in checkpointing mode";
+            return -1;
+        }
+    } else {
+        LINFO << "Unmounting /data before remounting into checkpointing mode";
+        if (umount2("/data", UMOUNT_NOFOLLOW) != 0) {
+            PERROR << "Failed to umount /data";
+            return -1;
+        }
+        DeviceMapper& dm = DeviceMapper::Instance();
+        while (dm.IsDmBlockDevice(block_device)) {
+            auto next_device = dm.GetParentBlockDeviceByPath(block_device);
+            auto name = dm.GetDmDeviceNameByPath(block_device);
+            if (!name) {
+                LERROR << "Failed to get dm-name for " << block_device;
+                return -1;
+            }
+            LINFO << "Deleting " << block_device << " named " << *name;
+            if (!dm.DeleteDevice(*name, 3s)) {
+                return -1;
+            }
+            if (!next_device) {
+                LERROR << "Failed to find parent device for " << block_device;
+            }
+            block_device = *next_device;
+        }
+        LINFO << "Remounting /data";
+        // TODO(b/143970043): remove this hack after fs_mgr_mount_all is refactored.
+        int result = fs_mgr_mount_all(fstab, MOUNT_MODE_ONLY_USERDATA);
+        return result == FS_MGR_MNTALL_FAIL ? -1 : 0;
+    }
+    return 0;
+}
+
 // wrapper to __mount() and expects a fully prepared fstab_rec,
 // unlike fs_mgr_do_mount which does more things with avb / verity etc.
 int fs_mgr_do_mount_one(const FstabEntry& entry, const std::string& mount_point) {
@@ -1615,10 +1710,8 @@
                 MKSWAP_BIN,
                 entry.blk_device.c_str(),
         };
-        int err = 0;
-        int status;
-        err = android_fork_execvp_ext(ARRAY_SIZE(mkswap_argv), const_cast<char**>(mkswap_argv),
-                                      &status, true, LOG_KLOG, false, nullptr, nullptr, 0);
+        int err = logwrap_fork_execvp(ARRAY_SIZE(mkswap_argv), mkswap_argv, nullptr, false,
+                                      LOG_KLOG, false, nullptr);
         if (err) {
             LERROR << "mkswap failed for " << entry.blk_device;
             ret = false;
diff --git a/fs_mgr/fs_mgr_dm_linear.cpp b/fs_mgr/fs_mgr_dm_linear.cpp
index 04ba0bf..0dcb9fe 100644
--- a/fs_mgr/fs_mgr_dm_linear.cpp
+++ b/fs_mgr/fs_mgr_dm_linear.cpp
@@ -52,45 +52,53 @@
 using DmTargetZero = android::dm::DmTargetZero;
 using DmTargetLinear = android::dm::DmTargetLinear;
 
-static bool GetPhysicalPartitionDevicePath(const LpMetadata& metadata,
+static bool GetPhysicalPartitionDevicePath(const IPartitionOpener& opener,
+                                           const LpMetadata& metadata,
                                            const LpMetadataBlockDevice& block_device,
-                                           const std::string& super_device,
-                                           std::string* result) {
-    // Note: device-mapper will not accept symlinks, so we must use realpath
-    // here.
-    std::string name = GetBlockDevicePartitionName(block_device);
-    std::string path = "/dev/block/by-name/" + name;
+                                           const std::string& super_device, std::string* result) {
     // If the super device is the source of this block device's metadata,
     // make sure we use the correct super device (and not just "super",
     // which might not exist.)
+    std::string name = GetBlockDevicePartitionName(block_device);
+    std::string dev_string = opener.GetDeviceString(name);
     if (GetMetadataSuperBlockDevice(metadata) == &block_device) {
-        path = super_device;
+        dev_string = opener.GetDeviceString(super_device);
     }
-    if (!android::base::Realpath(path, result)) {
-        PERROR << "realpath: " << path;
-        return false;
+
+    // Note: device-mapper will not accept symlinks, so we must use realpath
+    // here. If the device string is a major:minor sequence, we don't need to
+    // to call Realpath (it would not work anyway).
+    if (android::base::StartsWith(dev_string, "/")) {
+        if (!android::base::Realpath(dev_string, result)) {
+            PERROR << "realpath: " << dev_string;
+            return false;
+        }
+    } else {
+        *result = dev_string;
     }
     return true;
 }
 
-static bool CreateDmTable(const LpMetadata& metadata, const LpMetadataPartition& partition,
-                          const std::string& super_device, DmTable* table) {
+bool CreateDmTableInternal(const CreateLogicalPartitionParams& params, DmTable* table) {
+    const auto& super_device = params.block_device;
+
     uint64_t sector = 0;
-    for (size_t i = 0; i < partition.num_extents; i++) {
-        const auto& extent = metadata.extents[partition.first_extent_index + i];
+    for (size_t i = 0; i < params.partition->num_extents; i++) {
+        const auto& extent = params.metadata->extents[params.partition->first_extent_index + i];
         std::unique_ptr<DmTarget> target;
         switch (extent.target_type) {
             case LP_TARGET_TYPE_ZERO:
                 target = std::make_unique<DmTargetZero>(sector, extent.num_sectors);
                 break;
             case LP_TARGET_TYPE_LINEAR: {
-                const auto& block_device = metadata.block_devices[extent.target_source];
-                std::string path;
-                if (!GetPhysicalPartitionDevicePath(metadata, block_device, super_device, &path)) {
+                const auto& block_device = params.metadata->block_devices[extent.target_source];
+                std::string dev_string;
+                if (!GetPhysicalPartitionDevicePath(*params.partition_opener, *params.metadata,
+                                                    block_device, super_device, &dev_string)) {
                     LOG(ERROR) << "Unable to complete device-mapper table, unknown block device";
                     return false;
                 }
-                target = std::make_unique<DmTargetLinear>(sector, extent.num_sectors, path,
+                target = std::make_unique<DmTargetLinear>(sector, extent.num_sectors, dev_string,
                                                           extent.target_data);
                 break;
             }
@@ -103,30 +111,19 @@
         }
         sector += extent.num_sectors;
     }
-    if (partition.attributes & LP_PARTITION_ATTR_READONLY) {
+    if (params.partition->attributes & LP_PARTITION_ATTR_READONLY) {
         table->set_readonly(true);
     }
+    if (params.force_writable) {
+        table->set_readonly(false);
+    }
     return true;
 }
 
-static bool CreateLogicalPartition(const LpMetadata& metadata, const LpMetadataPartition& partition,
-                                   bool force_writable, const std::chrono::milliseconds& timeout_ms,
-                                   const std::string& super_device, std::string* path) {
-    DeviceMapper& dm = DeviceMapper::Instance();
-
-    DmTable table;
-    if (!CreateDmTable(metadata, partition, super_device, &table)) {
-        return false;
-    }
-    if (force_writable) {
-        table.set_readonly(false);
-    }
-    std::string name = GetPartitionName(partition);
-    if (!dm.CreateDevice(name, table, path, timeout_ms)) {
-        return false;
-    }
-    LINFO << "Created logical partition " << name << " on device " << *path;
-    return true;
+bool CreateDmTable(CreateLogicalPartitionParams params, DmTable* table) {
+    CreateLogicalPartitionParams::OwnedData owned_data;
+    if (!params.InitDefaults(&owned_data)) return false;
+    return CreateDmTableInternal(params, table);
 }
 
 bool CreateLogicalPartitions(const std::string& block_device) {
@@ -145,13 +142,20 @@
 }
 
 bool CreateLogicalPartitions(const LpMetadata& metadata, const std::string& super_device) {
+    CreateLogicalPartitionParams params = {
+            .block_device = super_device,
+            .metadata = &metadata,
+    };
     for (const auto& partition : metadata.partitions) {
         if (!partition.num_extents) {
             LINFO << "Skipping zero-length logical partition: " << GetPartitionName(partition);
             continue;
         }
-        std::string path;
-        if (!CreateLogicalPartition(metadata, partition, false, {}, super_device, &path)) {
+
+        params.partition = &partition;
+
+        std::string ignore_path;
+        if (!CreateLogicalPartition(params, &ignore_path)) {
             LERROR << "Could not create logical partition: " << GetPartitionName(partition);
             return false;
         }
@@ -159,29 +163,86 @@
     return true;
 }
 
-bool CreateLogicalPartition(const std::string& block_device, const LpMetadata& metadata,
-                            const std::string& partition_name, bool force_writable,
-                            const std::chrono::milliseconds& timeout_ms, std::string* path) {
-    for (const auto& partition : metadata.partitions) {
-        if (GetPartitionName(partition) == partition_name) {
-            return CreateLogicalPartition(metadata, partition, force_writable, timeout_ms,
-                                          block_device, path);
+bool CreateLogicalPartitionParams::InitDefaults(CreateLogicalPartitionParams::OwnedData* owned) {
+    if (block_device.empty()) {
+        LOG(ERROR) << "block_device is required for CreateLogicalPartition";
+        return false;
+    }
+
+    if (!partition_opener) {
+        owned->partition_opener = std::make_unique<PartitionOpener>();
+        partition_opener = owned->partition_opener.get();
+    }
+
+    // Read metadata if needed.
+    if (!metadata) {
+        if (!metadata_slot) {
+            LOG(ERROR) << "Either metadata or a metadata slot must be specified.";
+            return false;
+        }
+        auto slot = *metadata_slot;
+        if (owned->metadata = ReadMetadata(*partition_opener, block_device, slot);
+            !owned->metadata) {
+            LOG(ERROR) << "Could not read partition table for: " << block_device;
+            return false;
+        }
+        metadata = owned->metadata.get();
+    }
+
+    // Find the partition by name if needed.
+    if (!partition) {
+        for (const auto& metadata_partition : metadata->partitions) {
+            if (android::fs_mgr::GetPartitionName(metadata_partition) == partition_name) {
+                partition = &metadata_partition;
+                break;
+            }
         }
     }
-    LERROR << "Could not find any partition with name: " << partition_name;
-    return false;
+    if (!partition) {
+        LERROR << "Could not find any partition with name: " << partition_name;
+        return false;
+    }
+    if (partition_name.empty()) {
+        partition_name = android::fs_mgr::GetPartitionName(*partition);
+    } else if (partition_name != android::fs_mgr::GetPartitionName(*partition)) {
+        LERROR << "Inconsistent partition_name " << partition_name << " with partition "
+               << android::fs_mgr::GetPartitionName(*partition);
+        return false;
+    }
+
+    if (device_name.empty()) {
+        device_name = partition_name;
+    }
+
+    return true;
 }
 
-bool CreateLogicalPartition(const std::string& block_device, uint32_t metadata_slot,
-                            const std::string& partition_name, bool force_writable,
-                            const std::chrono::milliseconds& timeout_ms, std::string* path) {
-    auto metadata = ReadMetadata(block_device.c_str(), metadata_slot);
-    if (!metadata) {
-        LOG(ERROR) << "Could not read partition table.";
-        return true;
+bool CreateLogicalPartition(CreateLogicalPartitionParams params, std::string* path) {
+    CreateLogicalPartitionParams::OwnedData owned_data;
+    if (!params.InitDefaults(&owned_data)) return false;
+
+    DmTable table;
+    if (!CreateDmTableInternal(params, &table)) {
+        return false;
     }
-    return CreateLogicalPartition(block_device, *metadata.get(), partition_name, force_writable,
-                                  timeout_ms, path);
+
+    DeviceMapper& dm = DeviceMapper::Instance();
+    if (!dm.CreateDevice(params.device_name, table, path, params.timeout_ms)) {
+        return false;
+    }
+    LINFO << "Created logical partition " << params.device_name << " on device " << *path;
+    return true;
+}
+
+std::string CreateLogicalPartitionParams::GetDeviceName() const {
+    if (!device_name.empty()) return device_name;
+    return GetPartitionName();
+}
+
+std::string CreateLogicalPartitionParams::GetPartitionName() const {
+    if (!partition_name.empty()) return partition_name;
+    if (partition) return android::fs_mgr::GetPartitionName(*partition);
+    return "<unknown partition>";
 }
 
 bool UnmapDevice(const std::string& name) {
diff --git a/fs_mgr/fs_mgr_format.cpp b/fs_mgr/fs_mgr_format.cpp
index 1c6652a..acf4d7b 100644
--- a/fs_mgr/fs_mgr_format.cpp
+++ b/fs_mgr/fs_mgr_format.cpp
@@ -76,8 +76,8 @@
             "/system/bin/mke2fs", "-t",   "ext4", "-b", "4096", fs_blkdev.c_str(),
             size_str.c_str(),     nullptr};
 
-    rc = android_fork_execvp_ext(arraysize(mke2fs_args), const_cast<char**>(mke2fs_args), NULL,
-                                 true, LOG_KLOG, true, nullptr, nullptr, 0);
+    rc = logwrap_fork_execvp(arraysize(mke2fs_args), mke2fs_args, nullptr, false, LOG_KLOG, true,
+                             nullptr);
     if (rc) {
         LERROR << "mke2fs returned " << rc;
         return rc;
@@ -86,8 +86,8 @@
     const char* const e2fsdroid_args[] = {
             "/system/bin/e2fsdroid", "-e", "-a", fs_mnt_point.c_str(), fs_blkdev.c_str(), nullptr};
 
-    rc = android_fork_execvp_ext(arraysize(e2fsdroid_args), const_cast<char**>(e2fsdroid_args),
-                                 NULL, true, LOG_KLOG, true, nullptr, nullptr, 0);
+    rc = logwrap_fork_execvp(arraysize(e2fsdroid_args), e2fsdroid_args, nullptr, false, LOG_KLOG,
+                             true, nullptr);
     if (rc) {
         LERROR << "e2fsdroid returned " << rc;
     }
@@ -119,8 +119,7 @@
     };
     // clang-format on
 
-    return android_fork_execvp_ext(arraysize(args), const_cast<char**>(args), NULL, true,
-                                   LOG_KLOG, true, nullptr, nullptr, 0);
+    return logwrap_fork_execvp(arraysize(args), args, nullptr, false, LOG_KLOG, true, nullptr);
 }
 
 int fs_mgr_do_format(const FstabEntry& entry, bool crypt_footer) {
diff --git a/fs_mgr/fs_mgr_fstab.cpp b/fs_mgr/fs_mgr_fstab.cpp
index bc197cd..9697a4c 100644
--- a/fs_mgr/fs_mgr_fstab.cpp
+++ b/fs_mgr/fs_mgr_fstab.cpp
@@ -36,9 +36,11 @@
 
 #include "fs_mgr_priv.h"
 
+using android::base::EndsWith;
 using android::base::ParseByteCount;
 using android::base::ParseInt;
 using android::base::ReadFileToString;
+using android::base::Readlink;
 using android::base::Split;
 using android::base::StartsWith;
 
@@ -98,58 +100,9 @@
     return false;
 }
 
-const std::array<const char*, 3> kFileContentsEncryptionMode = {
-        "aes-256-xts",
-        "adiantum",
-        "ice",
-};
-
-const std::array<const char*, 3> kFileNamesEncryptionMode = {
-        "aes-256-cts",
-        "aes-256-heh",
-        "adiantum",
-};
-
 void ParseFileEncryption(const std::string& arg, FstabEntry* entry) {
-    // The fileencryption flag is followed by an = and the mode of contents encryption, then
-    // optionally a and the mode of filenames encryption (defaults to aes-256-cts).  Get it and
-    // return it.
     entry->fs_mgr_flags.file_encryption = true;
-
-    auto parts = Split(arg, ":");
-    if (parts.empty() || parts.size() > 2) {
-        LWARNING << "Warning: fileencryption= flag malformed: " << arg;
-        return;
-    }
-
-    // Alias for backwards compatibility.
-    if (parts[0] == "software") {
-        parts[0] = "aes-256-xts";
-    }
-
-    if (std::find(kFileContentsEncryptionMode.begin(), kFileContentsEncryptionMode.end(),
-                  parts[0]) == kFileContentsEncryptionMode.end()) {
-        LWARNING << "fileencryption= flag malformed, file contents encryption mode not found: "
-                 << arg;
-        return;
-    }
-
-    entry->file_contents_mode = parts[0];
-
-    if (parts.size() == 2) {
-        if (std::find(kFileNamesEncryptionMode.begin(), kFileNamesEncryptionMode.end(), parts[1]) ==
-            kFileNamesEncryptionMode.end()) {
-            LWARNING << "fileencryption= flag malformed, file names encryption mode not found: "
-                     << arg;
-            return;
-        }
-
-        entry->file_names_mode = parts[1];
-    } else if (entry->file_contents_mode == "adiantum") {
-        entry->file_names_mode = "adiantum";
-    } else {
-        entry->file_names_mode = "aes-256-cts";
-    }
+    entry->encryption_options = arg;
 }
 
 bool SetMountFlag(const std::string& flag, FstabEntry* entry) {
@@ -285,8 +238,7 @@
             // return it.
             entry->fs_mgr_flags.force_fde_or_fbe = true;
             entry->key_loc = arg;
-            entry->file_contents_mode = "aes-256-xts";
-            entry->file_names_mode = "aes-256-cts";
+            entry->encryption_options = "aes-256-xts:aes-256-cts";
         } else if (StartsWith(flag, "max_comp_streams=")) {
             if (!ParseInt(arg, &entry->max_comp_streams)) {
                 LWARNING << "Warning: max_comp_streams= flag malformed: " << arg;
@@ -598,7 +550,7 @@
     return boot_devices;
 }
 
-FstabEntry BuildGsiUserdataFstabEntry() {
+FstabEntry BuildDsuUserdataFstabEntry() {
     constexpr uint32_t kFlags = MS_NOATIME | MS_NOSUID | MS_NODEV;
 
     FstabEntry userdata = {
@@ -627,7 +579,11 @@
     return false;
 }
 
-void TransformFstabForGsi(Fstab* fstab) {
+}  // namespace
+
+void TransformFstabForDsu(Fstab* fstab, const std::vector<std::string>& dsu_partitions) {
+    static constexpr char kDsuKeysDir[] = "/avb";
+    // Convert userdata
     // Inherit fstab properties for userdata.
     FstabEntry userdata;
     if (FstabEntry* entry = GetEntryForMountPoint(fstab, "/data")) {
@@ -639,19 +595,65 @@
             userdata.key_dir += "/gsi";
         }
     } else {
-        userdata = BuildGsiUserdataFstabEntry();
-    }
-
-    if (EraseFstabEntry(fstab, "/system")) {
-        fstab->emplace_back(BuildGsiSystemFstabEntry());
+        userdata = BuildDsuUserdataFstabEntry();
     }
 
     if (EraseFstabEntry(fstab, "/data")) {
         fstab->emplace_back(userdata);
     }
-}
 
-}  // namespace
+    // Convert others
+    for (auto&& partition : dsu_partitions) {
+        if (!EndsWith(partition, gsi::kDsuPostfix)) {
+            continue;
+        }
+        // userdata has been handled
+        if (StartsWith(partition, "user")) {
+            continue;
+        }
+        // dsu_partition_name = corresponding_partition_name + kDsuPostfix
+        // e.g.
+        //    system_gsi for system
+        //    product_gsi for product
+        //    vendor_gsi for vendor
+        std::string lp_name = partition.substr(0, partition.length() - strlen(gsi::kDsuPostfix));
+        std::string mount_point = "/" + lp_name;
+        std::vector<FstabEntry*> entries = GetEntriesForMountPoint(fstab, mount_point);
+        if (entries.empty()) {
+            FstabEntry entry = {
+                    .blk_device = partition,
+                    // .logical_partition_name is required to look up AVB Hashtree descriptors.
+                    .logical_partition_name = "system",
+                    .mount_point = mount_point,
+                    .fs_type = "ext4",
+                    .flags = MS_RDONLY,
+                    .fs_options = "barrier=1",
+                    .avb_keys = kDsuKeysDir,
+            };
+            entry.fs_mgr_flags.wait = true;
+            entry.fs_mgr_flags.logical = true;
+            entry.fs_mgr_flags.first_stage_mount = true;
+        } else {
+            // If the corresponding partition exists, transform all its Fstab
+            // by pointing .blk_device to the DSU partition.
+            for (auto&& entry : entries) {
+                entry->blk_device = partition;
+                // AVB keys for DSU should always be under kDsuKeysDir.
+                entry->avb_keys += kDsuKeysDir;
+            }
+            // Make sure the ext4 is included to support GSI.
+            auto partition_ext4 =
+                    std::find_if(fstab->begin(), fstab->end(), [&](const auto& entry) {
+                        return entry.mount_point == mount_point && entry.fs_type == "ext4";
+                    });
+            if (partition_ext4 == fstab->end()) {
+                auto new_entry = *GetEntryForMountPoint(fstab, mount_point);
+                new_entry.fs_type = "ext4";
+                fstab->emplace_back(new_entry);
+            }
+        }
+    }
+}
 
 bool ReadFstabFromFile(const std::string& path, Fstab* fstab) {
     auto fstab_file = std::unique_ptr<FILE, decltype(&fclose)>{fopen(path.c_str(), "re"), fclose};
@@ -667,7 +669,9 @@
         return false;
     }
     if (!is_proc_mounts && !access(android::gsi::kGsiBootedIndicatorFile, F_OK)) {
-        TransformFstabForGsi(fstab);
+        std::string lp_names;
+        ReadFileToString(gsi::kGsiLpNamesFile, &lp_names);
+        TransformFstabForDsu(fstab, Split(lp_names, ","));
     }
 
     SkipMountingPartitions(fstab);
@@ -706,10 +710,12 @@
 
 // For GSI to skip mounting /product and /system_ext, until there are well-defined interfaces
 // between them and /system. Otherwise, the GSI flashed on /system might not be able to work with
-// /product and /system_ext. When they're skipped here, /system/product and /system/system_ext in
-// GSI will be used.
+// device-specific /product and /system_ext. skip_mount.cfg belongs to system_ext partition because
+// only common files for all targets can be put into system partition. It is under
+// /system/system_ext because GSI is a single system.img that includes the contents of system_ext
+// partition and product partition under /system/system_ext and /system/product, respectively.
 bool SkipMountingPartitions(Fstab* fstab) {
-    constexpr const char kSkipMountConfig[] = "/system/etc/init/config/skip_mount.cfg";
+    constexpr const char kSkipMountConfig[] = "/system/system_ext/etc/init/config/skip_mount.cfg";
 
     std::string skip_config;
     auto save_errno = errno;
@@ -777,6 +783,104 @@
     return nullptr;
 }
 
+std::vector<FstabEntry*> GetEntriesForMountPoint(Fstab* fstab, const std::string& path) {
+    std::vector<FstabEntry*> entries;
+    if (fstab == nullptr) {
+        return entries;
+    }
+
+    for (auto& entry : *fstab) {
+        if (entry.mount_point == path) {
+            entries.emplace_back(&entry);
+        }
+    }
+
+    return entries;
+}
+
+static std::string ResolveBlockDevice(const std::string& block_device) {
+    if (!StartsWith(block_device, "/dev/block/")) {
+        LWARNING << block_device << " is not a block device";
+        return block_device;
+    }
+    std::string name = block_device.substr(5);
+    if (!StartsWith(name, "block/dm-")) {
+        // Not a dm-device, but might be a symlink. Optimistically try to readlink.
+        std::string result;
+        if (Readlink(block_device, &result)) {
+            return result;
+        } else if (errno == EINVAL) {
+            // After all, it wasn't a symlink.
+            return block_device;
+        } else {
+            LERROR << "Failed to readlink " << block_device;
+            return "";
+        }
+    }
+    // It's a dm-device, let's find what's inside!
+    std::string sys_dir = "/sys/" + name;
+    while (true) {
+        std::string slaves_dir = sys_dir + "/slaves";
+        std::unique_ptr<DIR, decltype(&closedir)> dir(opendir(slaves_dir.c_str()), closedir);
+        if (!dir) {
+            LERROR << "Failed to open " << slaves_dir;
+            return "";
+        }
+        std::string sub_device_name = "";
+        for (auto entry = readdir(dir.get()); entry; entry = readdir(dir.get())) {
+            if (entry->d_type != DT_LNK) continue;
+            if (!sub_device_name.empty()) {
+                LERROR << "Too many slaves in " << slaves_dir;
+                return "";
+            }
+            sub_device_name = entry->d_name;
+        }
+        if (sub_device_name.empty()) {
+            LERROR << "No slaves in " << slaves_dir;
+            return "";
+        }
+        if (!StartsWith(sub_device_name, "dm-")) {
+            // Not a dm-device! We can stop now.
+            return "/dev/block/" + sub_device_name;
+        }
+        // Still a dm-device, keep digging.
+        sys_dir = "/sys/block/" + sub_device_name;
+    }
+}
+
+FstabEntry* GetMountedEntryForUserdata(Fstab* fstab) {
+    Fstab mounts;
+    if (!ReadFstabFromFile("/proc/mounts", &mounts)) {
+        LERROR << "Failed to read /proc/mounts";
+        return nullptr;
+    }
+    auto mounted_entry = GetEntryForMountPoint(&mounts, "/data");
+    if (mounted_entry == nullptr) {
+        LWARNING << "/data is not mounted";
+        return nullptr;
+    }
+    std::string resolved_block_device = ResolveBlockDevice(mounted_entry->blk_device);
+    if (resolved_block_device.empty()) {
+        return nullptr;
+    }
+    LINFO << "/data is mounted on " << resolved_block_device;
+    for (auto& entry : *fstab) {
+        if (entry.mount_point != "/data") {
+            continue;
+        }
+        std::string block_device;
+        if (!Readlink(entry.blk_device, &block_device)) {
+            LWARNING << "Failed to readlink " << entry.blk_device;
+            block_device = entry.blk_device;
+        }
+        if (block_device == resolved_block_device) {
+            return &entry;
+        }
+    }
+    LERROR << "Didn't find entry that was used to mount /data";
+    return nullptr;
+}
+
 std::set<std::string> GetBootDevices() {
     // First check the kernel commandline, then try the device tree otherwise
     std::string dt_file_name = get_android_dt_dir() + "/boot_devices";
@@ -796,23 +900,6 @@
     return ExtraBootDevices(fstab);
 }
 
-FstabEntry BuildGsiSystemFstabEntry() {
-    // .logical_partition_name is required to look up AVB Hashtree descriptors.
-    FstabEntry system = {
-            .blk_device = "system_gsi",
-            .mount_point = "/system",
-            .fs_type = "ext4",
-            .flags = MS_RDONLY,
-            .fs_options = "barrier=1",
-            // could add more keys separated by ':'.
-            .avb_keys = "/avb/q-gsi.avbpubkey:/avb/r-gsi.avbpubkey:/avb/s-gsi.avbpubkey",
-            .logical_partition_name = "system"};
-    system.fs_mgr_flags.wait = true;
-    system.fs_mgr_flags.logical = true;
-    system.fs_mgr_flags.first_stage_mount = true;
-    return system;
-}
-
 std::string GetVerityDeviceName(const FstabEntry& entry) {
     std::string base_device;
     if (entry.mount_point == "/") {
diff --git a/fs_mgr/fs_mgr_overlayfs.cpp b/fs_mgr/fs_mgr_overlayfs.cpp
index 4ee7db9..05f3311 100644
--- a/fs_mgr/fs_mgr_overlayfs.cpp
+++ b/fs_mgr/fs_mgr_overlayfs.cpp
@@ -133,7 +133,7 @@
     return ret | !rmdir(test_directory.c_str());
 }
 
-// At less than 1% free space return value of false,
+// At less than 1% or 8MB of free space return value of false,
 // means we will try to wrap with overlayfs.
 bool fs_mgr_filesystem_has_space(const std::string& mount_point) {
     // If we have access issues to find out space remaining, return true
@@ -145,9 +145,11 @@
         return true;
     }
 
-    static constexpr int kPercentThreshold = 1;  // 1%
+    static constexpr int kPercentThreshold = 1;                       // 1%
+    static constexpr unsigned long kSizeThreshold = 8 * 1024 * 1024;  // 8MB
 
-    return (vst.f_bfree >= (vst.f_blocks * kPercentThreshold / 100));
+    return (vst.f_bfree >= (vst.f_blocks * kPercentThreshold / 100)) &&
+           (vst.f_bfree * vst.f_bsize) >= kSizeThreshold;
 }
 
 const auto kPhysicalDevice = "/dev/block/by-name/"s;
@@ -711,7 +713,7 @@
     }
     report = report + ")=";
 
-    auto ret = mount("overlay", mount_point.c_str(), "overlay", MS_RDONLY | MS_RELATIME,
+    auto ret = mount("overlay", mount_point.c_str(), "overlay", MS_RDONLY | MS_NOATIME,
                      options.c_str());
     if (ret) {
         retval = false;
@@ -774,12 +776,13 @@
     entry.fs_type = mnt_type;
     if ((mnt_type == "f2fs") && !f2fs) entry.fs_type = "ext4";
     if ((mnt_type == "ext4") && !ext4) entry.fs_type = "f2fs";
-    entry.flags = MS_RELATIME;
+    entry.flags = MS_NOATIME;
     if (readonly) {
         entry.flags |= MS_RDONLY;
     } else {
         fs_mgr_set_blk_ro(device_path, false);
     }
+    entry.fs_mgr_flags.check = true;
     auto save_errno = errno;
     auto mounted = fs_mgr_do_mount_one(entry) == 0;
     if (!mounted) {
@@ -959,9 +962,16 @@
     }
 
     if (changed || partition_create) {
-        if (!CreateLogicalPartition(super_device, slot_number, partition_name, true, 10s,
-                                    scratch_device))
+        CreateLogicalPartitionParams params = {
+                .block_device = super_device,
+                .metadata_slot = slot_number,
+                .partition_name = partition_name,
+                .force_writable = true,
+                .timeout_ms = 10s,
+        };
+        if (!CreateLogicalPartition(params, scratch_device)) {
             return false;
+        }
 
         if (change) *change = true;
     }
@@ -1056,6 +1066,25 @@
     return candidates;
 }
 
+static void TryMountScratch() {
+    auto scratch_device = fs_mgr_overlayfs_scratch_device();
+    if (!fs_mgr_overlayfs_scratch_can_be_mounted(scratch_device)) {
+        return;
+    }
+    if (!WaitForFile(scratch_device, 10s)) {
+        return;
+    }
+    const auto mount_type = fs_mgr_overlayfs_scratch_mount_type();
+    if (!fs_mgr_overlayfs_mount_scratch(scratch_device, mount_type, true /* readonly */)) {
+        return;
+    }
+    auto has_overlayfs_dir = fs_mgr_access(kScratchMountPoint + kOverlayTopDir);
+    fs_mgr_overlayfs_umount_scratch();
+    if (has_overlayfs_dir) {
+        fs_mgr_overlayfs_mount_scratch(scratch_device, mount_type);
+    }
+}
+
 bool fs_mgr_overlayfs_mount_all(Fstab* fstab) {
     auto ret = false;
     if (fs_mgr_overlayfs_invalid()) return ret;
@@ -1070,19 +1099,7 @@
         }
         if (scratch_can_be_mounted) {
             scratch_can_be_mounted = false;
-            auto scratch_device = fs_mgr_overlayfs_scratch_device();
-            if (fs_mgr_overlayfs_scratch_can_be_mounted(scratch_device) &&
-                WaitForFile(scratch_device, 10s)) {
-                const auto mount_type = fs_mgr_overlayfs_scratch_mount_type();
-                if (fs_mgr_overlayfs_mount_scratch(scratch_device, mount_type,
-                                                   true /* readonly */)) {
-                    auto has_overlayfs_dir = fs_mgr_access(kScratchMountPoint + kOverlayTopDir);
-                    fs_mgr_overlayfs_umount_scratch();
-                    if (has_overlayfs_dir) {
-                        fs_mgr_overlayfs_mount_scratch(scratch_device, mount_type);
-                    }
-                }
-            }
+            TryMountScratch();
         }
         if (fs_mgr_overlayfs_mount(mount_point)) ret = true;
     }
@@ -1182,11 +1199,15 @@
     if ((mount_point != nullptr) && !fs_mgr_overlayfs_already_mounted(kScratchMountPoint, false)) {
         auto scratch_device = fs_mgr_overlayfs_scratch_device();
         if (scratch_device.empty()) {
-            auto slot_number = fs_mgr_overlayfs_slot_number();
-            auto super_device = fs_mgr_overlayfs_super_device(slot_number);
-            const auto partition_name = android::base::Basename(kScratchMountPoint);
-            CreateLogicalPartition(super_device, slot_number, partition_name, true, 10s,
-                                   &scratch_device);
+            auto metadata_slot = fs_mgr_overlayfs_slot_number();
+            CreateLogicalPartitionParams params = {
+                    .block_device = fs_mgr_overlayfs_super_device(metadata_slot),
+                    .metadata_slot = metadata_slot,
+                    .partition_name = android::base::Basename(kScratchMountPoint),
+                    .force_writable = true,
+                    .timeout_ms = 10s,
+            };
+            CreateLogicalPartition(params, &scratch_device);
         }
         mount_scratch = fs_mgr_overlayfs_mount_scratch(scratch_device,
                                                        fs_mgr_overlayfs_scratch_mount_type());
diff --git a/fs_mgr/fs_mgr_remount.cpp b/fs_mgr/fs_mgr_remount.cpp
index 149bee3..93bba68 100644
--- a/fs_mgr/fs_mgr_remount.cpp
+++ b/fs_mgr/fs_mgr_remount.cpp
@@ -82,13 +82,7 @@
 
 void MyLogger(android::base::LogId id, android::base::LogSeverity severity, const char* tag,
               const char* file, unsigned int line, const char* message) {
-    static const char log_characters[] = "VD\0WEFF";
-    if (severity < sizeof(log_characters)) {
-        auto severity_char = log_characters[severity];
-        if (severity_char) fprintf(stderr, "%c ", severity_char);
-    }
     fprintf(stderr, "%s\n", message);
-
     static auto logd = android::base::LogdLogger();
     logd(id, severity, tag, file, line, message);
 }
@@ -107,11 +101,9 @@
 
 }  // namespace
 
-int main(int argc, char* argv[]) {
-    android::base::InitLogging(argv, MyLogger);
-
+static int do_remount(int argc, char* argv[]) {
     enum {
-        SUCCESS,
+        SUCCESS = 0,
         NOT_USERDEBUG,
         BADARG,
         NOT_ROOT,
@@ -165,7 +157,7 @@
 
     // Make sure we are root.
     if (::getuid() != 0) {
-        LOG(ERROR) << "must be run as root";
+        LOG(ERROR) << "Not running as root. Try \"adb root\" first.";
         return NOT_ROOT;
     }
 
@@ -390,3 +382,10 @@
 
     return retval;
 }
+
+int main(int argc, char* argv[]) {
+    android::base::InitLogging(argv, MyLogger);
+    int result = do_remount(argc, argv);
+    printf("remount %s\n", result ? "failed" : "succeeded");
+    return result;
+}
diff --git a/fs_mgr/include/fs_mgr.h b/fs_mgr/include/fs_mgr.h
index bdec7be..9bc38f9 100644
--- a/fs_mgr/include/fs_mgr.h
+++ b/fs_mgr/include/fs_mgr.h
@@ -46,7 +46,9 @@
 enum mount_mode {
     MOUNT_MODE_DEFAULT = 0,
     MOUNT_MODE_EARLY = 1,
-    MOUNT_MODE_LATE = 2
+    MOUNT_MODE_LATE = 2,
+    // TODO(b/135984674): remove this after refactoring fs_mgr_mount_all.
+    MOUNT_MODE_ONLY_USERDATA = 3
 };
 
 #define FS_MGR_MNTALL_DEV_IS_METADATA_ENCRYPTED 7
@@ -105,6 +107,8 @@
 // it destroys verity devices from device mapper after the device is unmounted.
 int fs_mgr_umount_all(android::fs_mgr::Fstab* fstab);
 
+int fs_mgr_remount_userdata_into_checkpointing(android::fs_mgr::Fstab* fstab);
+
 // Finds the dm_bow device on which this block device is stacked, or returns
 // empty string
 std::string fs_mgr_find_bow_device(const std::string& block_device);
diff --git a/fs_mgr/include/fs_mgr_dm_linear.h b/fs_mgr/include/fs_mgr_dm_linear.h
index a1dc2dc..f3d09fb 100644
--- a/fs_mgr/include/fs_mgr_dm_linear.h
+++ b/fs_mgr/include/fs_mgr_dm_linear.h
@@ -29,6 +29,7 @@
 
 #include <chrono>
 #include <memory>
+#include <optional>
 #include <string>
 #include <vector>
 
@@ -49,27 +50,63 @@
 // method for ReadMetadata and CreateLogicalPartitions.
 bool CreateLogicalPartitions(const std::string& block_device);
 
-// Create a block device for a single logical partition, given metadata and
-// the partition name. On success, a path to the partition's block device is
-// returned. If |force_writable| is true, the "readonly" flag will be ignored
-// so the partition can be flashed.
-//
-// If |timeout_ms| is non-zero, then CreateLogicalPartition will block for the
-// given amount of time until the path returned in |path| is available.
-bool CreateLogicalPartition(const std::string& block_device, uint32_t metadata_slot,
-                            const std::string& partition_name, bool force_writable,
-                            const std::chrono::milliseconds& timeout_ms, std::string* path);
+struct CreateLogicalPartitionParams {
+    // Block device of the super partition.
+    std::string block_device;
 
-// Same as above, but with a given metadata object. Care should be taken that
-// the metadata represents a valid partition layout.
-bool CreateLogicalPartition(const std::string& block_device, const LpMetadata& metadata,
-                            const std::string& partition_name, bool force_writable,
-                            const std::chrono::milliseconds& timeout_ms, std::string* path);
+    // If |metadata| is null, the slot will be read using |metadata_slot|.
+    const LpMetadata* metadata = nullptr;
+    std::optional<uint32_t> metadata_slot;
+
+    // If |partition| is not set, it will be found via |partition_name|.
+    const LpMetadataPartition* partition = nullptr;
+    std::string partition_name;
+
+    // Force the device to be read-write even if it was specified as readonly
+    // in the metadata.
+    bool force_writable = false;
+
+    // If |timeout_ms| is non-zero, then CreateLogicalPartition will block for
+    // the given amount of time until the path returned in |path| is available.
+    std::chrono::milliseconds timeout_ms = {};
+
+    // If this is non-empty, it will override the device mapper name (by
+    // default the partition name will be used).
+    std::string device_name;
+
+    // If non-null, this will use the specified IPartitionOpener rather than
+    // the default one.
+    const IPartitionOpener* partition_opener = nullptr;
+
+    // Helpers for determining the effective partition and device name.
+    std::string GetPartitionName() const;
+    std::string GetDeviceName() const;
+
+    // Specify ownership of fields. The ownership of these fields are managed
+    // by the caller of InitDefaults().
+    // These are not declared in CreateLogicalPartitionParams so that the
+    // copy constructor is not deleted.
+    struct OwnedData {
+        std::unique_ptr<LpMetadata> metadata;
+        std::unique_ptr<IPartitionOpener> partition_opener;
+    };
+
+    // Fill in default values for |params| that CreateLogicalPartition assumes. Caller does
+    // not need to call this before calling CreateLogicalPartition; CreateLogicalPartition sets
+    // values when they are missing.
+    // Caller is responsible for destroying owned_data when |this| is not used.
+    bool InitDefaults(OwnedData* owned);
+};
+
+bool CreateLogicalPartition(CreateLogicalPartitionParams params, std::string* path);
 
 // Destroy the block device for a logical partition, by name. If |timeout_ms|
 // is non-zero, then this will block until the device path has been unlinked.
 bool DestroyLogicalPartition(const std::string& name);
 
+// Helper for populating a DmTable for a logical partition.
+bool CreateDmTable(CreateLogicalPartitionParams params, android::dm::DmTable* table);
+
 }  // namespace fs_mgr
 }  // namespace android
 
diff --git a/fs_mgr/include_fstab/fstab/fstab.h b/fs_mgr/include_fstab/fstab/fstab.h
index c7193ab..80deaef 100644
--- a/fs_mgr/include_fstab/fstab/fstab.h
+++ b/fs_mgr/include_fstab/fstab/fstab.h
@@ -45,8 +45,7 @@
     int max_comp_streams = 0;
     off64_t zram_size = 0;
     off64_t reserved_size = 0;
-    std::string file_contents_mode;
-    std::string file_names_mode;
+    std::string encryption_options;
     off64_t erase_blk_size = 0;
     off64_t logical_blk_size = 0;
     std::string sysfs_path;
@@ -101,9 +100,19 @@
 bool SkipMountingPartitions(Fstab* fstab);
 
 FstabEntry* GetEntryForMountPoint(Fstab* fstab, const std::string& path);
+// The Fstab can contain multiple entries for the same mount point with different configurations.
+std::vector<FstabEntry*> GetEntriesForMountPoint(Fstab* fstab, const std::string& path);
+FstabEntry* GetMountedEntryForUserdata(Fstab* fstab);
 
-// Helper method to build a GSI fstab entry for mounting /system.
-FstabEntry BuildGsiSystemFstabEntry();
+// This method builds DSU fstab entries and transfer the fstab.
+//
+// fstab points to the unmodified fstab.
+//
+// dsu_partitions contains partition names, e.g.
+//     dsu_partitions[0] = "system_gsi"
+//     dsu_partitions[1] = "userdata_gsi"
+//     dsu_partitions[2] = ...
+void TransformFstabForDsu(Fstab* fstab, const std::vector<std::string>& dsu_partitions);
 
 std::set<std::string> GetBootDevices();
 
diff --git a/fs_mgr/libdm/Android.bp b/fs_mgr/libdm/Android.bp
index 4cdea71..8a924d5 100644
--- a/fs_mgr/libdm/Android.bp
+++ b/fs_mgr/libdm/Android.bp
@@ -44,8 +44,17 @@
     },
 }
 
-cc_test {
-    name: "libdm_test",
+filegroup {
+    name: "libdm_test_srcs",
+    srcs: [
+        "dm_test.cpp",
+        "loop_control_test.cpp",
+        "test_util.cpp",
+    ],
+}
+
+cc_defaults {
+    name: "libdm_defaults",
     defaults: ["fs_mgr_defaults"],
     static_libs: [
         "libdm",
@@ -54,9 +63,35 @@
         "libfs_mgr",
         "liblog",
     ],
-    srcs: [
-        "dm_test.cpp",
-        "loop_control_test.cpp",
-        "test_util.cpp",
-    ]
+    srcs: [":libdm_test_srcs"],
+}
+
+cc_test {
+    name: "libdm_test",
+    defaults: ["libdm_defaults"],
+}
+
+cc_test {
+    name: "vts_libdm_test",
+    defaults: ["libdm_defaults"],
+    test_suites: ["vts-core"],
+    auto_gen_config: true,
+    require_root: true,
+    test_min_api_level: 29,
+}
+
+cc_fuzz {
+  name: "dm_linear_table_fuzzer",
+  defaults: ["fs_mgr_defaults"],
+  srcs: [
+    "dm_linear_fuzzer.cpp",
+    "test_util.cpp",
+  ],
+  static_libs: [
+        "libdm",
+        "libbase",
+        "libext2_uuid",
+        "libfs_mgr",
+        "liblog",
+  ],
 }
diff --git a/fs_mgr/libdm/dm.cpp b/fs_mgr/libdm/dm.cpp
index a4e0d76..809318c 100644
--- a/fs_mgr/libdm/dm.cpp
+++ b/fs_mgr/libdm/dm.cpp
@@ -16,11 +16,14 @@
 
 #include "libdm/dm.h"
 
+#include <linux/dm-ioctl.h>
 #include <sys/ioctl.h>
 #include <sys/sysmacros.h>
 #include <sys/types.h>
 
+#include <chrono>
 #include <functional>
+#include <string_view>
 #include <thread>
 
 #include <android-base/file.h>
@@ -79,7 +82,24 @@
     return true;
 }
 
-bool DeviceMapper::DeleteDevice(const std::string& name) {
+bool DeviceMapper::DeleteDeviceIfExists(const std::string& name,
+                                        const std::chrono::milliseconds& timeout_ms) {
+    if (GetState(name) == DmDeviceState::INVALID) {
+        return true;
+    }
+    return DeleteDevice(name, timeout_ms);
+}
+
+bool DeviceMapper::DeleteDeviceIfExists(const std::string& name) {
+    return DeleteDeviceIfExists(name, 0ms);
+}
+
+bool DeviceMapper::DeleteDevice(const std::string& name,
+                                const std::chrono::milliseconds& timeout_ms) {
+    std::string unique_path;
+    if (!GetDeviceUniquePath(name, &unique_path)) {
+        LOG(ERROR) << "Failed to get unique path for device " << name;
+    }
     struct dm_ioctl io;
     InitIo(&io, name);
 
@@ -93,9 +113,23 @@
     CHECK(io.flags & DM_UEVENT_GENERATED_FLAG)
             << "Didn't generate uevent for [" << name << "] removal";
 
+    if (timeout_ms <= std::chrono::milliseconds::zero()) {
+        return true;
+    }
+    if (unique_path.empty()) {
+        return false;
+    }
+    if (!WaitForFileDeleted(unique_path, timeout_ms)) {
+        LOG(ERROR) << "Timeout out waiting for " << unique_path << " to be deleted";
+        return false;
+    }
     return true;
 }
 
+bool DeviceMapper::DeleteDevice(const std::string& name) {
+    return DeleteDevice(name, 0ms);
+}
+
 static std::string GenerateUuid() {
     uuid_t uuid_bytes;
     uuid_generate(uuid_bytes);
@@ -472,5 +506,74 @@
     return std::string{spec.target_type, sizeof(spec.target_type)};
 }
 
+static bool ExtractBlockDeviceName(const std::string& path, std::string* name) {
+    static constexpr std::string_view kDevBlockPrefix("/dev/block/");
+    if (android::base::StartsWith(path, kDevBlockPrefix)) {
+        *name = path.substr(kDevBlockPrefix.length());
+        return true;
+    }
+    return false;
+}
+
+bool DeviceMapper::IsDmBlockDevice(const std::string& path) {
+    std::string name;
+    if (!ExtractBlockDeviceName(path, &name)) {
+        return false;
+    }
+    return android::base::StartsWith(name, "dm-");
+}
+
+std::optional<std::string> DeviceMapper::GetDmDeviceNameByPath(const std::string& path) {
+    std::string name;
+    if (!ExtractBlockDeviceName(path, &name)) {
+        LOG(WARNING) << path << " is not a block device";
+        return std::nullopt;
+    }
+    if (!android::base::StartsWith(name, "dm-")) {
+        LOG(WARNING) << path << " is not a dm device";
+        return std::nullopt;
+    }
+    std::string dm_name_file = "/sys/block/" + name + "/dm/name";
+    std::string dm_name;
+    if (!android::base::ReadFileToString(dm_name_file, &dm_name)) {
+        PLOG(ERROR) << "Failed to read file " << dm_name_file;
+        return std::nullopt;
+    }
+    dm_name = android::base::Trim(dm_name);
+    return dm_name;
+}
+
+std::optional<std::string> DeviceMapper::GetParentBlockDeviceByPath(const std::string& path) {
+    std::string name;
+    if (!ExtractBlockDeviceName(path, &name)) {
+        LOG(WARNING) << path << " is not a block device";
+        return std::nullopt;
+    }
+    if (!android::base::StartsWith(name, "dm-")) {
+        // Reached bottom of the device mapper stack.
+        return std::nullopt;
+    }
+    auto slaves_dir = "/sys/block/" + name + "/slaves";
+    auto dir = std::unique_ptr<DIR, decltype(&closedir)>(opendir(slaves_dir.c_str()), closedir);
+    if (dir == nullptr) {
+        PLOG(ERROR) << "Failed to open: " << slaves_dir;
+        return std::nullopt;
+    }
+    std::string sub_device_name = "";
+    for (auto entry = readdir(dir.get()); entry; entry = readdir(dir.get())) {
+        if (entry->d_type != DT_LNK) continue;
+        if (!sub_device_name.empty()) {
+            LOG(ERROR) << "Too many slaves in " << slaves_dir;
+            return std::nullopt;
+        }
+        sub_device_name = entry->d_name;
+    }
+    if (sub_device_name.empty()) {
+        LOG(ERROR) << "No slaves in " << slaves_dir;
+        return std::nullopt;
+    }
+    return "/dev/block/" + sub_device_name;
+}
+
 }  // namespace dm
 }  // namespace android
diff --git a/fs_mgr/libdm/dm_linear_fuzzer.cpp b/fs_mgr/libdm/dm_linear_fuzzer.cpp
new file mode 100644
index 0000000..8462901
--- /dev/null
+++ b/fs_mgr/libdm/dm_linear_fuzzer.cpp
@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <chrono>
+
+#include <android-base/file.h>
+#include <android-base/unique_fd.h>
+#include <libdm/dm_table.h>
+#include <libdm/loop_control.h>
+
+#include "test_util.h"
+
+using namespace android;
+using namespace android::base;
+using namespace android::dm;
+using namespace std;
+using namespace std::chrono_literals;
+
+/*
+ * This test aims at making the library crash, so these functions are not
+ * really useful.
+ * Keeping them here for future use.
+ */
+template <class T, class C>
+void ASSERT_EQ(const T& /*a*/, const C& /*b*/) {
+    // if (a != b) {}
+}
+
+template <class T>
+void ASSERT_FALSE(const T& /*a*/) {
+    // if (a) {}
+}
+
+template <class T, class C>
+void ASSERT_GE(const T& /*a*/, const C& /*b*/) {
+    // if (a < b) {}
+}
+
+template <class T, class C>
+void ASSERT_NE(const T& /*a*/, const C& /*b*/) {
+    // if (a == b) {}
+}
+
+template <class T>
+void ASSERT_TRUE(const T& /*a*/) {
+    // if (!a) {}
+}
+
+template <class T, class C>
+void EXPECT_EQ(const T& a, const C& b) {
+    ASSERT_EQ(a, b);
+}
+
+template <class T>
+void EXPECT_TRUE(const T& a) {
+    ASSERT_TRUE(a);
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+    uint64_t val[6];
+
+    if (size != sizeof(val)) {
+        return 0;
+    }
+
+    memcpy(&val, &data[0], sizeof(*val));
+
+    unique_fd tmp1(CreateTempFile("file_1", 4096));
+    ASSERT_GE(tmp1, 0);
+    unique_fd tmp2(CreateTempFile("file_2", 4096));
+    ASSERT_GE(tmp2, 0);
+
+    LoopDevice loop_a(tmp1, 10s);
+    ASSERT_TRUE(loop_a.valid());
+    LoopDevice loop_b(tmp2, 10s);
+    ASSERT_TRUE(loop_b.valid());
+
+    // Define a 2-sector device, with each sector mapping to the first sector
+    // of one of our loop devices.
+    DmTable table;
+    ASSERT_TRUE(table.Emplace<DmTargetLinear>(val[0], val[1], loop_a.device(), val[2]));
+    ASSERT_TRUE(table.Emplace<DmTargetLinear>(val[3], val[4], loop_b.device(), val[5]));
+    ASSERT_TRUE(table.valid());
+    ASSERT_EQ(2u, table.num_sectors());
+
+    TempDevice dev("libdm-test-dm-linear", table);
+    ASSERT_TRUE(dev.valid());
+    ASSERT_FALSE(dev.path().empty());
+
+    auto& dm = DeviceMapper::Instance();
+
+    dev_t dev_number;
+    ASSERT_TRUE(dm.GetDeviceNumber(dev.name(), &dev_number));
+    ASSERT_NE(dev_number, 0);
+
+    std::string dev_string;
+    ASSERT_TRUE(dm.GetDeviceString(dev.name(), &dev_string));
+    ASSERT_FALSE(dev_string.empty());
+
+    // Test GetTableStatus.
+    vector<DeviceMapper::TargetInfo> targets;
+    ASSERT_TRUE(dm.GetTableStatus(dev.name(), &targets));
+    ASSERT_EQ(targets.size(), 2);
+    EXPECT_EQ(strcmp(targets[0].spec.target_type, "linear"), 0);
+    EXPECT_TRUE(targets[0].data.empty());
+    EXPECT_EQ(targets[0].spec.sector_start, 0);
+    EXPECT_EQ(targets[0].spec.length, 1);
+    EXPECT_EQ(strcmp(targets[1].spec.target_type, "linear"), 0);
+    EXPECT_TRUE(targets[1].data.empty());
+    EXPECT_EQ(targets[1].spec.sector_start, 1);
+    EXPECT_EQ(targets[1].spec.length, 1);
+
+    // Test GetTargetType().
+    EXPECT_EQ(DeviceMapper::GetTargetType(targets[0].spec), std::string{"linear"});
+    EXPECT_EQ(DeviceMapper::GetTargetType(targets[1].spec), std::string{"linear"});
+
+    // Normally the TestDevice destructor would delete this, but at least one
+    // test should ensure that device deletion works.
+    ASSERT_TRUE(dev.Destroy());
+
+    return 0;
+}
diff --git a/fs_mgr/libdm/dm_table.cpp b/fs_mgr/libdm/dm_table.cpp
index 15c7ce1..efe03ab 100644
--- a/fs_mgr/libdm/dm_table.cpp
+++ b/fs_mgr/libdm/dm_table.cpp
@@ -26,6 +26,7 @@
     if (!target->Valid()) {
         return false;
     }
+    num_sectors_ += target->size();
     targets_.push_back(std::move(target));
     return true;
 }
diff --git a/fs_mgr/libdm/dm_target.cpp b/fs_mgr/libdm/dm_target.cpp
index 7c9804c..65f6e12 100644
--- a/fs_mgr/libdm/dm_target.cpp
+++ b/fs_mgr/libdm/dm_target.cpp
@@ -244,7 +244,8 @@
 }
 
 std::string DmTargetDefaultKey::GetParameterString() const {
-    return cipher_ + " " + key_ + " " + blockdev_ + " " + std::to_string(start_sector_);
+    return cipher_ + " " + key_ + " " + blockdev_ + " " + std::to_string(start_sector_) +
+           (set_dun_ ? " 1 set_dun" : "");
 }
 
 }  // namespace dm
diff --git a/fs_mgr/libdm/dm_test.cpp b/fs_mgr/libdm/dm_test.cpp
index eed21dc..b7f31bc 100644
--- a/fs_mgr/libdm/dm_test.cpp
+++ b/fs_mgr/libdm/dm_test.cpp
@@ -29,6 +29,7 @@
 #include <thread>
 
 #include <android-base/file.h>
+#include <android-base/strings.h>
 #include <android-base/unique_fd.h>
 #include <gtest/gtest.h>
 #include <libdm/dm.h>
@@ -47,50 +48,6 @@
     ASSERT_TRUE(dm.GetTargetByName("linear", &info));
 }
 
-// Helper to ensure that device mapper devices are released.
-class TempDevice {
-  public:
-    TempDevice(const std::string& name, const DmTable& table)
-        : dm_(DeviceMapper::Instance()), name_(name), valid_(false) {
-        valid_ = dm_.CreateDevice(name, table, &path_, 5s);
-    }
-    TempDevice(TempDevice&& other) noexcept
-        : dm_(other.dm_), name_(other.name_), path_(other.path_), valid_(other.valid_) {
-        other.valid_ = false;
-    }
-    ~TempDevice() {
-        if (valid_) {
-            dm_.DeleteDevice(name_);
-        }
-    }
-    bool Destroy() {
-        if (!valid_) {
-            return false;
-        }
-        valid_ = false;
-        return dm_.DeleteDevice(name_);
-    }
-    std::string path() const { return path_; }
-    const std::string& name() const { return name_; }
-    bool valid() const { return valid_; }
-
-    TempDevice(const TempDevice&) = delete;
-    TempDevice& operator=(const TempDevice&) = delete;
-
-    TempDevice& operator=(TempDevice&& other) noexcept {
-        name_ = other.name_;
-        valid_ = other.valid_;
-        other.valid_ = false;
-        return *this;
-    }
-
-  private:
-    DeviceMapper& dm_;
-    std::string name_;
-    std::string path_;
-    bool valid_;
-};
-
 TEST(libdm, DmLinear) {
     unique_fd tmp1(CreateTempFile("file_1", 4096));
     ASSERT_GE(tmp1, 0);
@@ -114,6 +71,7 @@
     ASSERT_TRUE(table.Emplace<DmTargetLinear>(0, 1, loop_a.device(), 0));
     ASSERT_TRUE(table.Emplace<DmTargetLinear>(1, 1, loop_b.device(), 0));
     ASSERT_TRUE(table.valid());
+    ASSERT_EQ(2u, table.num_sectors());
 
     TempDevice dev("libdm-test-dm-linear", table);
     ASSERT_TRUE(dev.valid());
@@ -176,6 +134,7 @@
     DmTable table;
     ASSERT_TRUE(table.Emplace<DmTargetLinear>(0, 1, loop_a.device(), 0));
     ASSERT_TRUE(table.valid());
+    ASSERT_EQ(1u, table.num_sectors());
 
     TempDevice dev("libdm-test-dm-suspend-resume", table);
     ASSERT_TRUE(dev.valid());
@@ -292,6 +251,7 @@
     ASSERT_TRUE(origin_table.AddTarget(make_unique<DmTargetSnapshotOrigin>(
             0, kBaseDeviceSize / kSectorSize, base_loop_->device())));
     ASSERT_TRUE(origin_table.valid());
+    ASSERT_EQ(kBaseDeviceSize / kSectorSize, origin_table.num_sectors());
 
     origin_dev_ = std::make_unique<TempDevice>("libdm-test-dm-snapshot-origin", origin_table);
     ASSERT_TRUE(origin_dev_->valid());
@@ -303,6 +263,7 @@
             0, kBaseDeviceSize / kSectorSize, base_loop_->device(), cow_loop_->device(),
             SnapshotStorageMode::Persistent, 8)));
     ASSERT_TRUE(snap_table.valid());
+    ASSERT_EQ(kBaseDeviceSize / kSectorSize, snap_table.num_sectors());
 
     snapshot_dev_ = std::make_unique<TempDevice>("libdm-test-dm-snapshot", snap_table);
     ASSERT_TRUE(snapshot_dev_->valid());
@@ -322,6 +283,7 @@
             make_unique<DmTargetSnapshot>(0, kBaseDeviceSize / kSectorSize, base_loop_->device(),
                                           cow_loop_->device(), SnapshotStorageMode::Merge, 8)));
     ASSERT_TRUE(merge_table.valid());
+    ASSERT_EQ(kBaseDeviceSize / kSectorSize, merge_table.num_sectors());
 
     DeviceMapper& dm = DeviceMapper::Instance();
     ASSERT_TRUE(dm.LoadTableAndActivate("libdm-test-dm-snapshot", merge_table));
@@ -559,3 +521,87 @@
     ASSERT_TRUE(target.Valid());
     ASSERT_EQ(target.GetParameterString(), "AES-256-XTS abcdef0123456789 /dev/loop0 0");
 }
+
+TEST(libdm, DeleteDeviceWithTimeout) {
+    unique_fd tmp(CreateTempFile("file_1", 4096));
+    ASSERT_GE(tmp, 0);
+    LoopDevice loop(tmp, 10s);
+    ASSERT_TRUE(loop.valid());
+
+    DmTable table;
+    ASSERT_TRUE(table.Emplace<DmTargetLinear>(0, 1, loop.device(), 0));
+    ASSERT_TRUE(table.valid());
+    TempDevice dev("libdm-test-dm-linear", table);
+    ASSERT_TRUE(dev.valid());
+
+    DeviceMapper& dm = DeviceMapper::Instance();
+
+    std::string path;
+    ASSERT_TRUE(dm.GetDmDevicePathByName("libdm-test-dm-linear", &path));
+    ASSERT_EQ(0, access(path.c_str(), F_OK));
+
+    ASSERT_TRUE(dm.DeleteDevice("libdm-test-dm-linear", 5s));
+    ASSERT_EQ(DmDeviceState::INVALID, dm.GetState("libdm-test-dm-linear"));
+    ASSERT_NE(0, access(path.c_str(), F_OK));
+    ASSERT_EQ(ENOENT, errno);
+}
+
+TEST(libdm, IsDmBlockDevice) {
+    unique_fd tmp(CreateTempFile("file_1", 4096));
+    ASSERT_GE(tmp, 0);
+    LoopDevice loop(tmp, 10s);
+    ASSERT_TRUE(loop.valid());
+    ASSERT_TRUE(android::base::StartsWith(loop.device(), "/dev/block"));
+
+    DmTable table;
+    ASSERT_TRUE(table.Emplace<DmTargetLinear>(0, 1, loop.device(), 0));
+    ASSERT_TRUE(table.valid());
+
+    TempDevice dev("libdm-test-dm-linear", table);
+    ASSERT_TRUE(dev.valid());
+
+    DeviceMapper& dm = DeviceMapper::Instance();
+    ASSERT_TRUE(dm.IsDmBlockDevice(dev.path()));
+    ASSERT_FALSE(dm.IsDmBlockDevice(loop.device()));
+}
+
+TEST(libdm, GetDmDeviceNameByPath) {
+    unique_fd tmp(CreateTempFile("file_1", 4096));
+    ASSERT_GE(tmp, 0);
+    LoopDevice loop(tmp, 10s);
+    ASSERT_TRUE(loop.valid());
+    ASSERT_TRUE(android::base::StartsWith(loop.device(), "/dev/block"));
+
+    DmTable table;
+    ASSERT_TRUE(table.Emplace<DmTargetLinear>(0, 1, loop.device(), 0));
+    ASSERT_TRUE(table.valid());
+
+    TempDevice dev("libdm-test-dm-linear", table);
+    ASSERT_TRUE(dev.valid());
+
+    DeviceMapper& dm = DeviceMapper::Instance();
+    // Not a dm device, GetDmDeviceNameByPath will return std::nullopt.
+    ASSERT_FALSE(dm.GetDmDeviceNameByPath(loop.device()));
+    auto name = dm.GetDmDeviceNameByPath(dev.path());
+    ASSERT_EQ("libdm-test-dm-linear", *name);
+}
+
+TEST(libdm, GetParentBlockDeviceByPath) {
+    unique_fd tmp(CreateTempFile("file_1", 4096));
+    ASSERT_GE(tmp, 0);
+    LoopDevice loop(tmp, 10s);
+    ASSERT_TRUE(loop.valid());
+    ASSERT_TRUE(android::base::StartsWith(loop.device(), "/dev/block"));
+
+    DmTable table;
+    ASSERT_TRUE(table.Emplace<DmTargetLinear>(0, 1, loop.device(), 0));
+    ASSERT_TRUE(table.valid());
+
+    TempDevice dev("libdm-test-dm-linear", table);
+    ASSERT_TRUE(dev.valid());
+
+    DeviceMapper& dm = DeviceMapper::Instance();
+    ASSERT_FALSE(dm.GetParentBlockDeviceByPath(loop.device()));
+    auto sub_block_device = dm.GetParentBlockDeviceByPath(dev.path());
+    ASSERT_EQ(loop.device(), *sub_block_device);
+}
diff --git a/fs_mgr/libdm/include/libdm/dm.h b/fs_mgr/libdm/include/libdm/dm.h
index cf306f3..418210c 100644
--- a/fs_mgr/libdm/include/libdm/dm.h
+++ b/fs_mgr/libdm/include/libdm/dm.h
@@ -89,6 +89,11 @@
     // Removes a device mapper device with the given name.
     // Returns 'true' on success, false otherwise.
     bool DeleteDevice(const std::string& name);
+    bool DeleteDeviceIfExists(const std::string& name);
+    // Removes a device mapper device with the given name and waits for |timeout_ms| milliseconds
+    // for the corresponding block device to be deleted.
+    bool DeleteDevice(const std::string& name, const std::chrono::milliseconds& timeout_ms);
+    bool DeleteDeviceIfExists(const std::string& name, const std::chrono::milliseconds& timeout_ms);
 
     // Fetches and returns the complete state of the underlying device mapper
     // device with given name.
@@ -209,6 +214,19 @@
 
     static std::string GetTargetType(const struct dm_target_spec& spec);
 
+    // Returns true if given path is a path to a dm block device.
+    bool IsDmBlockDevice(const std::string& path);
+
+    // Returns name of a dm-device with the given path, or std::nulloptr if given path is not a
+    // dm-device.
+    std::optional<std::string> GetDmDeviceNameByPath(const std::string& path);
+
+    // Returns a parent block device of a dm device with the given path, or std::nullopt if:
+    //  * Given path doesn't correspond to a dm device.
+    //  * A dm device is based on top of more than one block devices.
+    //  * A failure occurred.
+    std::optional<std::string> GetParentBlockDeviceByPath(const std::string& path);
+
   private:
     // Maximum possible device mapper targets registered in the kernel.
     // This is only used to read the list of targets from kernel so we allocate
diff --git a/fs_mgr/libdm/include/libdm/dm_target.h b/fs_mgr/libdm/include/libdm/dm_target.h
index a66ab7a..a78bc71 100644
--- a/fs_mgr/libdm/include/libdm/dm_target.h
+++ b/fs_mgr/libdm/include/libdm/dm_target.h
@@ -280,12 +280,14 @@
 class DmTargetDefaultKey final : public DmTarget {
   public:
     DmTargetDefaultKey(uint64_t start, uint64_t length, const std::string& cipher,
-                       const std::string& key, const std::string& blockdev, uint64_t start_sector)
+                       const std::string& key, const std::string& blockdev, uint64_t start_sector,
+                       bool set_dun = false)
         : DmTarget(start, length),
           cipher_(cipher),
           key_(key),
           blockdev_(blockdev),
-          start_sector_(start_sector) {}
+          start_sector_(start_sector),
+          set_dun_(set_dun) {}
 
     std::string name() const override { return "default-key"; }
     bool Valid() const override { return true; }
@@ -296,6 +298,7 @@
     std::string key_;
     std::string blockdev_;
     uint64_t start_sector_;
+    bool set_dun_;
 };
 
 }  // namespace dm
diff --git a/fs_mgr/libdm/include/libdm/loop_control.h b/fs_mgr/libdm/include/libdm/loop_control.h
index eeed6b5..ad53c11 100644
--- a/fs_mgr/libdm/include/libdm/loop_control.h
+++ b/fs_mgr/libdm/include/libdm/loop_control.h
@@ -64,7 +64,8 @@
   public:
     // Create a loop device for the given file descriptor. It is closed when
     // LoopDevice is destroyed only if auto_close is true.
-    LoopDevice(int fd, const std::chrono::milliseconds& timeout_ms, bool auto_close = false);
+    LoopDevice(android::base::borrowed_fd fd, const std::chrono::milliseconds& timeout_ms,
+               bool auto_close = false);
     // Create a loop device for the given file path. It will be opened for
     // reading and writing and closed when the loop device is detached.
     LoopDevice(const std::string& path, const std::chrono::milliseconds& timeout_ms);
@@ -81,8 +82,8 @@
   private:
     void Init(const std::chrono::milliseconds& timeout_ms);
 
-    android::base::unique_fd fd_;
-    bool owns_fd_;
+    android::base::borrowed_fd fd_;
+    android::base::unique_fd owned_fd_;
     std::string device_;
     LoopControl control_;
     bool valid_ = false;
diff --git a/fs_mgr/libdm/loop_control.cpp b/fs_mgr/libdm/loop_control.cpp
index edc9a45..2e40a18 100644
--- a/fs_mgr/libdm/loop_control.cpp
+++ b/fs_mgr/libdm/loop_control.cpp
@@ -133,18 +133,23 @@
     return true;
 }
 
-LoopDevice::LoopDevice(int fd, const std::chrono::milliseconds& timeout_ms, bool auto_close)
-    : fd_(fd), owns_fd_(auto_close) {
+LoopDevice::LoopDevice(android::base::borrowed_fd fd, const std::chrono::milliseconds& timeout_ms,
+                       bool auto_close)
+    : fd_(fd), owned_fd_(-1) {
+    if (auto_close) {
+        owned_fd_.reset(fd.get());
+    }
     Init(timeout_ms);
 }
 
 LoopDevice::LoopDevice(const std::string& path, const std::chrono::milliseconds& timeout_ms)
-    : fd_(-1), owns_fd_(true) {
-    fd_.reset(open(path.c_str(), O_RDWR | O_CLOEXEC));
-    if (fd_ < -1) {
+    : fd_(-1), owned_fd_(-1) {
+    owned_fd_.reset(open(path.c_str(), O_RDWR | O_CLOEXEC));
+    if (owned_fd_ == -1) {
         PLOG(ERROR) << "open failed for " << path;
         return;
     }
+    fd_ = owned_fd_;
     Init(timeout_ms);
 }
 
@@ -152,13 +157,10 @@
     if (valid()) {
         control_.Detach(device_);
     }
-    if (!owns_fd_) {
-        (void)fd_.release();
-    }
 }
 
 void LoopDevice::Init(const std::chrono::milliseconds& timeout_ms) {
-    valid_ = control_.Attach(fd_, timeout_ms, &device_);
+    valid_ = control_.Attach(fd_.get(), timeout_ms, &device_);
 }
 
 }  // namespace dm
diff --git a/fs_mgr/libdm/test_util.h b/fs_mgr/libdm/test_util.h
index 96b051c..6671364 100644
--- a/fs_mgr/libdm/test_util.h
+++ b/fs_mgr/libdm/test_util.h
@@ -20,8 +20,12 @@
 #include <android-base/unique_fd.h>
 #include <stddef.h>
 
+#include <chrono>
 #include <string>
 
+#include <libdm/dm.h>
+#include <libdm/dm_table.h>
+
 namespace android {
 namespace dm {
 
@@ -29,6 +33,50 @@
 // created with a fixed size.
 android::base::unique_fd CreateTempFile(const std::string& name, size_t size);
 
+// Helper to ensure that device mapper devices are released.
+class TempDevice {
+  public:
+    TempDevice(const std::string& name, const DmTable& table)
+        : dm_(DeviceMapper::Instance()), name_(name), valid_(false) {
+        valid_ = dm_.CreateDevice(name, table, &path_, std::chrono::seconds(5));
+    }
+    TempDevice(TempDevice&& other) noexcept
+        : dm_(other.dm_), name_(other.name_), path_(other.path_), valid_(other.valid_) {
+        other.valid_ = false;
+    }
+    ~TempDevice() {
+        if (valid_) {
+            dm_.DeleteDevice(name_);
+        }
+    }
+    bool Destroy() {
+        if (!valid_) {
+            return false;
+        }
+        valid_ = false;
+        return dm_.DeleteDevice(name_);
+    }
+    std::string path() const { return path_; }
+    const std::string& name() const { return name_; }
+    bool valid() const { return valid_; }
+
+    TempDevice(const TempDevice&) = delete;
+    TempDevice& operator=(const TempDevice&) = delete;
+
+    TempDevice& operator=(TempDevice&& other) noexcept {
+        name_ = other.name_;
+        valid_ = other.valid_;
+        other.valid_ = false;
+        return *this;
+    }
+
+  private:
+    DeviceMapper& dm_;
+    std::string name_;
+    std::string path_;
+    bool valid_;
+};
+
 }  // namespace dm
 }  // namespace android
 
diff --git a/fs_mgr/libdm/utility.cpp b/fs_mgr/libdm/utility.cpp
index eccf2fb..f252565 100644
--- a/fs_mgr/libdm/utility.cpp
+++ b/fs_mgr/libdm/utility.cpp
@@ -52,5 +52,15 @@
     return WaitForCondition(condition, timeout_ms);
 }
 
+bool WaitForFileDeleted(const std::string& path, const std::chrono::milliseconds& timeout_ms) {
+    auto condition = [&]() -> WaitResult {
+        if (access(path.c_str(), F_OK) == 0 || errno != ENOENT) {
+            return WaitResult::Wait;
+        }
+        return WaitResult::Done;
+    };
+    return WaitForCondition(condition, timeout_ms);
+}
+
 }  // namespace dm
 }  // namespace android
diff --git a/fs_mgr/libdm/utility.h b/fs_mgr/libdm/utility.h
index f1dce9e..58fa96b 100644
--- a/fs_mgr/libdm/utility.h
+++ b/fs_mgr/libdm/utility.h
@@ -23,6 +23,7 @@
 enum class WaitResult { Wait, Done, Fail };
 
 bool WaitForFile(const std::string& path, const std::chrono::milliseconds& timeout_ms);
+bool WaitForFileDeleted(const std::string& path, const std::chrono::milliseconds& timeout_ms);
 bool WaitForCondition(const std::function<WaitResult()>& condition,
                       const std::chrono::milliseconds& timeout_ms);
 
diff --git a/fs_mgr/libfs_avb/Android.bp b/fs_mgr/libfs_avb/Android.bp
index 414a186..bf51fe7 100644
--- a/fs_mgr/libfs_avb/Android.bp
+++ b/fs_mgr/libfs_avb/Android.bp
@@ -37,11 +37,9 @@
         "libfstab",
     ],
     shared_libs: [
+        "libbase",
         "libcrypto",
     ],
-    header_libs: [
-        "libbase_headers",
-    ],
     target: {
         darwin: {
             enabled: false,
@@ -123,6 +121,7 @@
 cc_test {
     name: "libfs_avb_device_test",
     test_suites: ["device-tests"],
+    require_root: true,
     static_libs: [
         "libavb",
         "libdm",
diff --git a/fs_mgr/libfs_avb/fs_avb.cpp b/fs_mgr/libfs_avb/fs_avb.cpp
index c4d7511..8770a6b 100644
--- a/fs_mgr/libfs_avb/fs_avb.cpp
+++ b/fs_mgr/libfs_avb/fs_avb.cpp
@@ -22,6 +22,7 @@
 #include <sys/ioctl.h>
 #include <sys/types.h>
 
+#include <algorithm>
 #include <sstream>
 #include <string>
 #include <vector>
@@ -308,7 +309,18 @@
             return nullptr;
     }
 
-    if (!ValidatePublicKeyBlob(public_key_data, Split(fstab_entry.avb_keys, ":"))) {
+    // fstab_entry.avb_keys might be either a directory containing multiple keys,
+    // or a string indicating multiple keys separated by ':'.
+    std::vector<std::string> allowed_avb_keys;
+    auto list_avb_keys_in_dir = ListFiles(fstab_entry.avb_keys);
+    if (list_avb_keys_in_dir) {
+        std::sort(list_avb_keys_in_dir->begin(), list_avb_keys_in_dir->end());
+        allowed_avb_keys = *list_avb_keys_in_dir;
+    } else {
+        allowed_avb_keys = Split(fstab_entry.avb_keys, ":");
+    }
+
+    if (!ValidatePublicKeyBlob(public_key_data, allowed_avb_keys)) {
         avb_handle->status_ = AvbHandleStatus::kVerificationError;
         LWARNING << "Found unknown public key used to sign " << fstab_entry.mount_point;
         if (!allow_verification_error) {
diff --git a/fs_mgr/libfs_avb/tests/avb_util_test.cpp b/fs_mgr/libfs_avb/tests/avb_util_test.cpp
index 0d342d3..784eb9c 100644
--- a/fs_mgr/libfs_avb/tests/avb_util_test.cpp
+++ b/fs_mgr/libfs_avb/tests/avb_util_test.cpp
@@ -101,10 +101,10 @@
 TEST_F(AvbUtilTest, DeriveAvbPartitionName) {
     // The fstab_entry to test.
     FstabEntry fstab_entry = {
-        .blk_device = "/dev/block/dm-1",  // a dm-linear device (logical)
-        .mount_point = "/system",
-        .fs_type = "ext4",
-        .logical_partition_name = "system",
+            .blk_device = "/dev/block/dm-1",  // a dm-linear device (logical)
+            .logical_partition_name = "system",
+            .mount_point = "/system",
+            .fs_type = "ext4",
     };
 
     // Logical partitions.
diff --git a/fs_mgr/libfs_avb/tests/util_test.cpp b/fs_mgr/libfs_avb/tests/util_test.cpp
index 12b5acb..e64282b 100644
--- a/fs_mgr/libfs_avb/tests/util_test.cpp
+++ b/fs_mgr/libfs_avb/tests/util_test.cpp
@@ -16,10 +16,12 @@
 
 #include <unistd.h>
 
+#include <algorithm>
 #include <future>
 #include <string>
 #include <thread>
 
+#include <android-base/strings.h>
 #include <base/files/file_util.h>
 
 #include "fs_avb_test_util.h"
@@ -29,6 +31,7 @@
 using android::fs_mgr::BytesToHex;
 using android::fs_mgr::FileWaitMode;
 using android::fs_mgr::HexToBytes;
+using android::fs_mgr::ListFiles;
 using android::fs_mgr::NibbleValue;
 using android::fs_mgr::WaitForFile;
 
@@ -210,4 +213,102 @@
     ASSERT_TRUE(base::DeleteFile(wait_path, false /* resursive */));
 }
 
+TEST(BasicUtilTest, ListFiles) {
+    // Gets system tmp dir.
+    base::FilePath tmp_dir;
+    ASSERT_TRUE(GetTempDir(&tmp_dir));
+
+    // Creates a test dir for ListFiles testing.
+    base::FilePath test_dir;
+    ASSERT_TRUE(base::CreateTemporaryDirInDir(tmp_dir, "list-file-tests.", &test_dir));
+
+    // Generates dummy files to list.
+    base::FilePath file_path_1 = test_dir.Append("1.txt");
+    ASSERT_TRUE(base::WriteFile(file_path_1, "1", 1));
+    base::FilePath file_path_2 = test_dir.Append("2.txt");
+    ASSERT_TRUE(base::WriteFile(file_path_2, "22", 2));
+    base::FilePath file_path_3 = test_dir.Append("3.txt");
+    ASSERT_TRUE(base::WriteFile(file_path_3, "333", 3));
+
+    // List files for comparison.
+    auto result = ListFiles(test_dir.value());
+    ASSERT_TRUE(result);
+    ASSERT_TRUE(result.has_value());
+    auto files = result.value();
+    EXPECT_EQ(3UL, files.size());
+    // Sort them offline for comparison.
+    std::sort(files.begin(), files.end());
+    EXPECT_EQ(file_path_1.value(), files[0]);
+    EXPECT_EQ(file_path_2.value(), files[1]);
+    EXPECT_EQ(file_path_3.value(), files[2]);
+
+    ASSERT_TRUE(base::DeleteFile(test_dir, true /* resursive */));
+}
+
+TEST(BasicUtilTest, ListFilesShouldDiscardSymlink) {
+    // Gets system tmp dir.
+    base::FilePath tmp_dir;
+    ASSERT_TRUE(GetTempDir(&tmp_dir));
+
+    // Creates a test dir for ListFiles testing.
+    base::FilePath test_dir;
+    ASSERT_TRUE(base::CreateTemporaryDirInDir(tmp_dir, "list-file-tests.", &test_dir));
+
+    // Generates dummy files to list.
+    base::FilePath file_path_1 = test_dir.Append("1.txt");
+    ASSERT_TRUE(base::WriteFile(file_path_1, "1", 1));
+    base::FilePath file_path_2 = test_dir.Append("2.txt");
+    ASSERT_TRUE(base::WriteFile(file_path_2, "22", 2));
+    // Creates a symlink and checks it won't be returned by ListFiles.
+    base::FilePath file_path_3 = test_dir.Append("3.txt");
+    base::FilePath non_existent_target = test_dir.Append("non_existent_target.txt");
+    ASSERT_TRUE(base::CreateSymbolicLink(non_existent_target, file_path_3));
+
+    // List files for comparison.
+    auto result = ListFiles(test_dir.value());
+    ASSERT_TRUE(result);
+    ASSERT_TRUE(result.has_value());
+    auto files = result.value();
+    EXPECT_EQ(2UL, files.size());  // Should not include the symlink file.
+    // Sort them offline for comparison.
+    std::sort(files.begin(), files.end());
+    EXPECT_EQ(file_path_1.value(), files[0]);
+    EXPECT_EQ(file_path_2.value(), files[1]);
+
+    ASSERT_TRUE(base::DeleteFile(test_dir, true /* resursive */));
+}
+
+TEST(BasicUtilTest, ListFilesOpenDirFailure) {
+    // Gets system tmp dir.
+    base::FilePath tmp_dir;
+    ASSERT_TRUE(GetTempDir(&tmp_dir));
+
+    // Generates dummy files to list.
+    base::FilePath no_such_dir = tmp_dir.Append("not_such_dir");
+
+    auto fail = ListFiles(no_such_dir.value());
+    ASSERT_FALSE(fail);
+    EXPECT_EQ(ENOENT, fail.error().code());
+    EXPECT_TRUE(android::base::StartsWith(fail.error().message(), "Failed to opendir: "));
+}
+
+TEST(BasicUtilTest, ListFilesEmptyDir) {
+    // Gets system tmp dir.
+    base::FilePath tmp_dir;
+    ASSERT_TRUE(GetTempDir(&tmp_dir));
+
+    // Creates a test dir for ListFiles testing.
+    base::FilePath test_dir;
+    ASSERT_TRUE(base::CreateTemporaryDirInDir(tmp_dir, "list-file-tests.", &test_dir));
+
+    // List files without sorting.
+    auto result = ListFiles(test_dir.value());
+    ASSERT_TRUE(result);
+    ASSERT_TRUE(result.has_value());
+    auto files = result.value();
+    EXPECT_EQ(0UL, files.size());
+
+    ASSERT_TRUE(base::DeleteFile(test_dir, true /* resursive */));
+}
+
 }  // namespace fs_avb_host_test
diff --git a/fs_mgr/libfs_avb/util.cpp b/fs_mgr/libfs_avb/util.cpp
index d214b5b..7783d04 100644
--- a/fs_mgr/libfs_avb/util.cpp
+++ b/fs_mgr/libfs_avb/util.cpp
@@ -16,10 +16,13 @@
 
 #include "util.h"
 
+#include <dirent.h>
 #include <sys/ioctl.h>
+#include <sys/types.h>
 
 #include <thread>
 
+#include <android-base/stringprintf.h>
 #include <android-base/unique_fd.h>
 #include <linux/fs.h>
 
@@ -122,5 +125,23 @@
     return ioctl(fd, BLKROSET, &ON) == 0;
 }
 
+Result<std::vector<std::string>> ListFiles(const std::string& dir) {
+    struct dirent* de;
+    std::vector<std::string> files;
+
+    std::unique_ptr<DIR, int (*)(DIR*)> dirp(opendir(dir.c_str()), closedir);
+    if (!dirp) {
+        return ErrnoError() << "Failed to opendir: " << dir;
+    }
+
+    while ((de = readdir(dirp.get()))) {
+        if (de->d_type != DT_REG) continue;
+        std::string full_path = android::base::StringPrintf("%s/%s", dir.c_str(), de->d_name);
+        files.emplace_back(std::move(full_path));
+    }
+
+    return files;
+}
+
 }  // namespace fs_mgr
 }  // namespace android
diff --git a/fs_mgr/libfs_avb/util.h b/fs_mgr/libfs_avb/util.h
index 7763da5..427ab7c 100644
--- a/fs_mgr/libfs_avb/util.h
+++ b/fs_mgr/libfs_avb/util.h
@@ -18,6 +18,7 @@
 
 #include <chrono>
 #include <string>
+#include <vector>
 
 #ifdef HOST_TEST
 #include <base/logging.h>
@@ -25,6 +26,11 @@
 #include <android-base/logging.h>
 #endif
 
+#include <android-base/result.h>
+
+using android::base::ErrnoError;
+using android::base::Result;
+
 #define FS_AVB_TAG "[libfs_avb]"
 
 // Logs a message to kernel
@@ -60,5 +66,8 @@
 
 bool SetBlockDeviceReadOnly(const std::string& blockdev);
 
+// Returns a list of file under the dir, no order is guaranteed.
+Result<std::vector<std::string>> ListFiles(const std::string& dir);
+
 }  // namespace fs_mgr
 }  // namespace android
diff --git a/fs_mgr/liblp/Android.bp b/fs_mgr/liblp/Android.bp
index 5b377ae..ea0fca8 100644
--- a/fs_mgr/liblp/Android.bp
+++ b/fs_mgr/liblp/Android.bp
@@ -17,7 +17,6 @@
 liblp_lib_deps = [
     "libbase",
     "liblog",
-    "libcrypto",
     "libcrypto_utils",
     "libsparse",
     "libext4_utils",
@@ -41,7 +40,9 @@
         "utility.cpp",
         "writer.cpp",
     ],
-    shared_libs: liblp_lib_deps,
+    shared_libs: [
+        "libcrypto",
+    ] + liblp_lib_deps,
     target: {
         windows: {
             enabled: true,
@@ -55,29 +56,55 @@
     export_include_dirs: ["include"],
 }
 
-cc_test {
-    name: "liblp_test_static",
+filegroup {
+    name: "liblp_test_srcs",
+    srcs: [
+        "builder_test.cpp",
+        "device_test.cpp",
+        "io_test.cpp",
+        "test_partition_opener.cpp",
+        "utility_test.cpp",
+    ],
+}
+
+cc_defaults {
+    name: "liblp_test_defaults",
     defaults: ["fs_mgr_defaults"],
     cppflags: [
         "-Wno-unused-parameter",
     ],
     static_libs: [
+        "libcutils",
         "libgmock",
         "libfs_mgr",
         "liblp",
+        "libcrypto_static",
     ] + liblp_lib_deps,
-    stl: "libc++_static",
-    srcs: [
-        "builder_test.cpp",
-        "io_test.cpp",
-        "test_partition_opener.cpp",
-        "utility_test.cpp",
+    header_libs: [
+        "libstorage_literals_headers",
     ],
-    target: {
-        android: {
-            static_libs: [
-                "libcutils",
-            ],
-        },
-    },
+    stl: "libc++_static",
+    srcs: [":liblp_test_srcs"],
 }
+
+cc_test {
+    name: "liblp_test",
+    defaults: ["liblp_test_defaults"],
+    test_config: "liblp_test.xml",
+    test_suites: ["device-tests"],
+}
+
+cc_test {
+    name: "vts_core_liblp_test",
+    defaults: ["liblp_test_defaults"],
+    test_suites: ["vts-core"],
+    auto_gen_config: true,
+    test_min_api_level: 29,
+    require_root: true,
+}
+
+cc_test {
+    name: "vts_kernel_liblp_test",
+    defaults: ["liblp_test_defaults"],
+}
+
diff --git a/fs_mgr/liblp/AndroidTest.xml b/fs_mgr/liblp/AndroidTest.xml
index fe1002c..2eb0ad1 100644
--- a/fs_mgr/liblp/AndroidTest.xml
+++ b/fs_mgr/liblp/AndroidTest.xml
@@ -21,8 +21,8 @@
     </target_preparer>
     <test class="com.android.tradefed.testtype.VtsMultiDeviceTest">
       <option name="test-module-name" value="VtsKernelLiblpTest"/>
-        <option name="binary-test-source" value="_32bit::DATA/nativetest/liblp_test_static/liblp_test_static" />
-        <option name="binary-test-source" value="_64bit::DATA/nativetest64/liblp_test_static/liblp_test_static" />
+        <option name="binary-test-source" value="_32bit::DATA/nativetest/vts_kernel_liblp_test/vts_kernel_liblp_test" />
+        <option name="binary-test-source" value="_64bit::DATA/nativetest64/vts_kernel_liblp_test/vts_kernel_liblp_test" />
         <option name="binary-test-type" value="gtest"/>
         <option name="test-timeout" value="1m"/>
         <option name="precondition-first-api-level" value="29" />
diff --git a/fs_mgr/liblp/TEST_MAPPING b/fs_mgr/liblp/TEST_MAPPING
new file mode 100644
index 0000000..04bcbda
--- /dev/null
+++ b/fs_mgr/liblp/TEST_MAPPING
@@ -0,0 +1,7 @@
+{
+  "presubmit": [
+    {
+      "name": "liblp_test"
+    }
+  ]
+}
diff --git a/fs_mgr/liblp/builder.cpp b/fs_mgr/liblp/builder.cpp
index 777743c..54350a5 100644
--- a/fs_mgr/liblp/builder.cpp
+++ b/fs_mgr/liblp/builder.cpp
@@ -40,12 +40,16 @@
     return true;
 }
 
+Interval LinearExtent::AsInterval() const {
+    return Interval(device_index(), physical_sector(), end_sector());
+}
+
 bool ZeroExtent::AddTo(LpMetadata* out) const {
     out->extents.emplace_back(LpMetadataExtent{num_sectors_, LP_TARGET_TYPE_ZERO, 0, 0});
     return true;
 }
 
-Partition::Partition(const std::string& name, const std::string& group_name, uint32_t attributes)
+Partition::Partition(std::string_view name, std::string_view group_name, uint32_t attributes)
     : name_(name), group_name_(group_name), attributes_(attributes), size_(0) {}
 
 void Partition::AddExtent(std::unique_ptr<Extent>&& extent) {
@@ -96,6 +100,20 @@
     DCHECK(size_ == aligned_size);
 }
 
+Partition Partition::GetBeginningExtents(uint64_t aligned_size) const {
+    Partition p(name_, group_name_, attributes_);
+    for (const auto& extent : extents_) {
+        auto le = extent->AsLinearExtent();
+        if (le) {
+            p.AddExtent(std::make_unique<LinearExtent>(*le));
+        } else {
+            p.AddExtent(std::make_unique<ZeroExtent>(extent->num_sectors()));
+        }
+    }
+    p.ShrinkTo(aligned_size);
+    return p;
+}
+
 uint64_t Partition::BytesOnDisk() const {
     uint64_t sectors = 0;
     for (const auto& extent : extents_) {
@@ -140,7 +158,7 @@
     }
     if (opener) {
         for (size_t i = 0; i < builder->block_devices_.size(); i++) {
-            std::string partition_name = GetBlockDevicePartitionName(builder->block_devices_[i]);
+            std::string partition_name = builder->GetBlockDevicePartitionName(i);
             BlockDeviceInfo device_info;
             if (opener->GetInfo(partition_name, &device_info)) {
                 builder->UpdateBlockDeviceInfo(i, device_info);
@@ -153,7 +171,8 @@
 std::unique_ptr<MetadataBuilder> MetadataBuilder::NewForUpdate(const IPartitionOpener& opener,
                                                                const std::string& source_partition,
                                                                uint32_t source_slot_number,
-                                                               uint32_t target_slot_number) {
+                                                               uint32_t target_slot_number,
+                                                               bool always_keep_source_slot) {
     auto metadata = ReadMetadata(opener, source_partition, source_slot_number);
     if (!metadata) {
         return nullptr;
@@ -164,13 +183,21 @@
     // name and system properties.
     // See comments for UpdateMetadataForOtherSuper.
     auto super_device = GetMetadataSuperBlockDevice(*metadata.get());
-    if (GetBlockDevicePartitionName(*super_device) != "super" &&
+    if (android::fs_mgr::GetBlockDevicePartitionName(*super_device) != "super" &&
         IsRetrofitDynamicPartitionsDevice()) {
         if (!UpdateMetadataForOtherSuper(metadata.get(), source_slot_number, target_slot_number)) {
             return nullptr;
         }
     }
 
+    if (IPropertyFetcher::GetInstance()->GetBoolProperty("ro.virtual_ab.enabled", false) &&
+        !always_keep_source_slot) {
+        if (!UpdateMetadataForInPlaceSnapshot(metadata.get(), source_slot_number,
+                                              target_slot_number)) {
+            return nullptr;
+        }
+    }
+
     return New(*metadata.get(), &opener);
 }
 
@@ -192,7 +219,8 @@
     // Translate block devices.
     auto source_block_devices = std::move(metadata->block_devices);
     for (const auto& source_block_device : source_block_devices) {
-        std::string partition_name = GetBlockDevicePartitionName(source_block_device);
+        std::string partition_name =
+                android::fs_mgr::GetBlockDevicePartitionName(source_block_device);
         std::string slot_suffix = GetPartitionSlotSuffix(partition_name);
         if (slot_suffix.empty() || slot_suffix != source_slot_suffix) {
             // This should never happen. It means that the source metadata
@@ -224,7 +252,7 @@
     memset(&header_, 0, sizeof(header_));
     header_.magic = LP_METADATA_HEADER_MAGIC;
     header_.major_version = LP_METADATA_MAJOR_VERSION;
-    header_.minor_version = LP_METADATA_MINOR_VERSION;
+    header_.minor_version = LP_METADATA_MINOR_VERSION_MIN;
     header_.header_size = sizeof(header_);
     header_.partitions.entry_size = sizeof(LpMetadataPartition);
     header_.extents.entry_size = sizeof(LpMetadataExtent);
@@ -375,7 +403,7 @@
             block_devices_.emplace_back(out);
         }
     }
-    if (GetBlockDevicePartitionName(block_devices_[0]) != super_partition) {
+    if (GetBlockDevicePartitionName(0) != super_partition) {
         LERROR << "No super partition was specified.";
         return false;
     }
@@ -418,7 +446,7 @@
     return true;
 }
 
-bool MetadataBuilder::AddGroup(const std::string& group_name, uint64_t maximum_size) {
+bool MetadataBuilder::AddGroup(std::string_view group_name, uint64_t maximum_size) {
     if (FindGroup(group_name)) {
         LERROR << "Group already exists: " << group_name;
         return false;
@@ -428,10 +456,10 @@
 }
 
 Partition* MetadataBuilder::AddPartition(const std::string& name, uint32_t attributes) {
-    return AddPartition(name, std::string(kDefaultGroup), attributes);
+    return AddPartition(name, kDefaultGroup, attributes);
 }
 
-Partition* MetadataBuilder::AddPartition(const std::string& name, const std::string& group_name,
+Partition* MetadataBuilder::AddPartition(std::string_view name, std::string_view group_name,
                                          uint32_t attributes) {
     if (name.empty()) {
         LERROR << "Partition must have a non-empty name.";
@@ -449,7 +477,7 @@
     return partitions_.back().get();
 }
 
-Partition* MetadataBuilder::FindPartition(const std::string& name) {
+Partition* MetadataBuilder::FindPartition(std::string_view name) {
     for (const auto& partition : partitions_) {
         if (partition->name() == name) {
             return partition.get();
@@ -458,7 +486,7 @@
     return nullptr;
 }
 
-PartitionGroup* MetadataBuilder::FindGroup(const std::string& group_name) {
+PartitionGroup* MetadataBuilder::FindGroup(std::string_view group_name) {
     for (const auto& group : groups_) {
         if (group->name() == group_name) {
             return group.get();
@@ -478,7 +506,7 @@
     return total;
 }
 
-void MetadataBuilder::RemovePartition(const std::string& name) {
+void MetadataBuilder::RemovePartition(std::string_view name) {
     for (auto iter = partitions_.begin(); iter != partitions_.end(); iter++) {
         if ((*iter)->name() == name) {
             partitions_.erase(iter);
@@ -571,19 +599,48 @@
     return true;
 }
 
-bool MetadataBuilder::GrowPartition(Partition* partition, uint64_t aligned_size) {
+Interval Interval::Intersect(const Interval& a, const Interval& b) {
+    Interval ret = a;
+    if (a.device_index != b.device_index) {
+        ret.start = ret.end = a.start;  // set length to 0 to indicate no intersection.
+        return ret;
+    }
+    ret.start = std::max(a.start, b.start);
+    ret.end = std::max(ret.start, std::min(a.end, b.end));
+    return ret;
+}
+
+std::vector<Interval> Interval::Intersect(const std::vector<Interval>& a,
+                                          const std::vector<Interval>& b) {
+    std::vector<Interval> ret;
+    for (const Interval& a_interval : a) {
+        for (const Interval& b_interval : b) {
+            auto intersect = Intersect(a_interval, b_interval);
+            if (intersect.length() > 0) ret.emplace_back(std::move(intersect));
+        }
+    }
+    return ret;
+}
+
+std::unique_ptr<Extent> Interval::AsExtent() const {
+    return std::make_unique<LinearExtent>(length(), device_index, start);
+}
+
+bool MetadataBuilder::GrowPartition(Partition* partition, uint64_t aligned_size,
+                                    const std::vector<Interval>& free_region_hint) {
     uint64_t space_needed = aligned_size - partition->size();
     uint64_t sectors_needed = space_needed / LP_SECTOR_SIZE;
     DCHECK(sectors_needed * LP_SECTOR_SIZE == space_needed);
 
     std::vector<Interval> free_regions = GetFreeRegions();
+    if (!free_region_hint.empty())
+        free_regions = Interval::Intersect(free_regions, free_region_hint);
 
     const uint64_t sectors_per_block = geometry_.logical_block_size / LP_SECTOR_SIZE;
     CHECK_NE(sectors_per_block, 0);
     CHECK(sectors_needed % sectors_per_block == 0);
 
-    if (IsABDevice() && !IsRetrofitMetadata() &&
-        GetPartitionSlotSuffix(partition->name()) == "_b") {
+    if (IsABDevice() && ShouldHalveSuper() && GetPartitionSlotSuffix(partition->name()) == "_b") {
         // Allocate "a" partitions top-down and "b" partitions bottom-up, to
         // minimize fragmentation during OTA.
         free_regions = PrioritizeSecondHalfOfSuper(free_regions);
@@ -643,7 +700,7 @@
     return true;
 }
 
-std::vector<MetadataBuilder::Interval> MetadataBuilder::PrioritizeSecondHalfOfSuper(
+std::vector<Interval> MetadataBuilder::PrioritizeSecondHalfOfSuper(
         const std::vector<Interval>& free_list) {
     const auto& super = block_devices_[0];
     uint64_t first_sector = super.first_logical_sector;
@@ -789,6 +846,11 @@
             return nullptr;
         }
 
+        if (partition->attributes() & LP_PARTITION_ATTR_UPDATED) {
+            static const uint16_t kMinVersion = LP_METADATA_VERSION_FOR_UPDATED_ATTR;
+            metadata->header.minor_version = std::max(metadata->header.minor_version, kMinVersion);
+        }
+
         strncpy(part.name, partition->name().c_str(), sizeof(part.name));
         part.first_extent_index = static_cast<uint32_t>(metadata->extents.size());
         part.num_extents = static_cast<uint32_t>(partition->extents().size());
@@ -849,7 +911,7 @@
 bool MetadataBuilder::FindBlockDeviceByName(const std::string& partition_name,
                                             uint32_t* index) const {
     for (size_t i = 0; i < block_devices_.size(); i++) {
-        if (GetBlockDevicePartitionName(block_devices_[i]) == partition_name) {
+        if (GetBlockDevicePartitionName(i) == partition_name) {
             *index = i;
             return true;
         }
@@ -914,7 +976,8 @@
     return true;
 }
 
-bool MetadataBuilder::ResizePartition(Partition* partition, uint64_t requested_size) {
+bool MetadataBuilder::ResizePartition(Partition* partition, uint64_t requested_size,
+                                      const std::vector<Interval>& free_region_hint) {
     // Align the space needed up to the nearest sector.
     uint64_t aligned_size = AlignTo(requested_size, geometry_.logical_block_size);
     uint64_t old_size = partition->size();
@@ -924,7 +987,7 @@
     }
 
     if (aligned_size > old_size) {
-        if (!GrowPartition(partition, aligned_size)) {
+        if (!GrowPartition(partition, aligned_size, free_region_hint)) {
             return false;
         }
     } else if (aligned_size < partition->size()) {
@@ -946,7 +1009,7 @@
     return names;
 }
 
-void MetadataBuilder::RemoveGroupAndPartitions(const std::string& group_name) {
+void MetadataBuilder::RemoveGroupAndPartitions(std::string_view group_name) {
     if (group_name == kDefaultGroup) {
         // Cannot remove the default group.
         return;
@@ -974,7 +1037,8 @@
     // Note: we don't compare alignment, since it's a performance thing and
     // won't affect whether old extents continue to work.
     return first.first_logical_sector == second.first_logical_sector && first.size == second.size &&
-           GetBlockDevicePartitionName(first) == GetBlockDevicePartitionName(second);
+           android::fs_mgr::GetBlockDevicePartitionName(first) ==
+                   android::fs_mgr::GetBlockDevicePartitionName(second);
 }
 
 bool MetadataBuilder::ImportPartitions(const LpMetadata& metadata,
@@ -1056,8 +1120,9 @@
                                                             false);
 }
 
-bool MetadataBuilder::IsRetrofitMetadata() const {
-    return GetBlockDevicePartitionName(block_devices_[0]) != LP_METADATA_DEFAULT_PARTITION_NAME;
+bool MetadataBuilder::ShouldHalveSuper() const {
+    return GetBlockDevicePartitionName(0) == LP_METADATA_DEFAULT_PARTITION_NAME &&
+           !IPropertyFetcher::GetInstance()->GetBoolProperty("ro.virtual_ab.enabled", false);
 }
 
 bool MetadataBuilder::AddLinearExtent(Partition* partition, const std::string& block_device,
@@ -1073,7 +1138,7 @@
     return true;
 }
 
-std::vector<Partition*> MetadataBuilder::ListPartitionsInGroup(const std::string& group_name) {
+std::vector<Partition*> MetadataBuilder::ListPartitionsInGroup(std::string_view group_name) {
     std::vector<Partition*> partitions;
     for (const auto& partition : partitions_) {
         if (partition->group_name() == group_name) {
@@ -1083,7 +1148,7 @@
     return partitions;
 }
 
-bool MetadataBuilder::ChangePartitionGroup(Partition* partition, const std::string& group_name) {
+bool MetadataBuilder::ChangePartitionGroup(Partition* partition, std::string_view group_name) {
     if (!FindGroup(group_name)) {
         LERROR << "Partition cannot change to unknown group: " << group_name;
         return false;
@@ -1121,5 +1186,15 @@
     return true;
 }
 
+std::string MetadataBuilder::GetBlockDevicePartitionName(uint64_t index) const {
+    return index < block_devices_.size()
+                   ? android::fs_mgr::GetBlockDevicePartitionName(block_devices_[index])
+                   : "";
+}
+
+uint64_t MetadataBuilder::logical_block_size() const {
+    return geometry_.logical_block_size;
+}
+
 }  // namespace fs_mgr
 }  // namespace android
diff --git a/fs_mgr/liblp/builder_test.cpp b/fs_mgr/liblp/builder_test.cpp
index 6d27873..a67ffa7 100644
--- a/fs_mgr/liblp/builder_test.cpp
+++ b/fs_mgr/liblp/builder_test.cpp
@@ -14,34 +14,27 @@
  * limitations under the License.
  */
 
-#include <fs_mgr.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 #include <liblp/builder.h>
+#include <storage_literals/storage_literals.h>
 
-#include "mock_property_fetcher.h"
+#include "liblp_test.h"
 #include "utility.h"
 
 using namespace std;
+using namespace android::storage_literals;
 using namespace android::fs_mgr;
-using ::android::fs_mgr::MockPropertyFetcher;
+using namespace android::fs_mgr::testing;
 using ::testing::_;
 using ::testing::AnyNumber;
 using ::testing::ElementsAre;
 using ::testing::NiceMock;
 using ::testing::Return;
 
-static void ResetPropertyFetcher() {
-    IPropertyFetcher::OverrideForTesting(std::make_unique<NiceMock<MockPropertyFetcher>>());
-}
-
-MockPropertyFetcher* GetMockedInstance() {
-    return static_cast<MockPropertyFetcher*>(IPropertyFetcher::GetInstance());
-}
-
 class Environment : public ::testing::Environment {
   public:
-    void SetUp() override { ResetPropertyFetcher(); }
+    void SetUp() override { ResetMockPropertyFetcher(); }
 };
 
 int main(int argc, char** argv) {
@@ -49,11 +42,7 @@
     return RUN_ALL_TESTS();
 }
 
-class BuilderTest : public ::testing::Test {
-  public:
-    void SetUp() override { ResetPropertyFetcher(); }
-    void TearDown() override { ResetPropertyFetcher(); }
-};
+class BuilderTest : public LiblpTest {};
 
 TEST_F(BuilderTest, BuildBasic) {
     unique_ptr<MetadataBuilder> builder = MetadataBuilder::New(1024 * 1024, 1024, 2);
@@ -362,7 +351,7 @@
     const LpMetadataHeader& header = exported->header;
     EXPECT_EQ(header.magic, LP_METADATA_HEADER_MAGIC);
     EXPECT_EQ(header.major_version, LP_METADATA_MAJOR_VERSION);
-    EXPECT_EQ(header.minor_version, LP_METADATA_MINOR_VERSION);
+    EXPECT_EQ(header.minor_version, LP_METADATA_MINOR_VERSION_MIN);
 
     ASSERT_EQ(exported->partitions.size(), 2);
     ASSERT_EQ(exported->extents.size(), 3);
@@ -460,23 +449,6 @@
     EXPECT_EQ(builder, nullptr);
 }
 
-TEST_F(BuilderTest, block_device_info) {
-    PartitionOpener opener;
-
-    BlockDeviceInfo device_info;
-    ASSERT_TRUE(opener.GetInfo(fs_mgr_get_super_partition_name(), &device_info));
-
-    // Sanity check that the device doesn't give us some weird inefficient
-    // alignment.
-    ASSERT_EQ(device_info.alignment % LP_SECTOR_SIZE, 0);
-    ASSERT_EQ(device_info.alignment_offset % LP_SECTOR_SIZE, 0);
-    ASSERT_LE(device_info.alignment_offset, INT_MAX);
-    ASSERT_EQ(device_info.logical_block_size % LP_SECTOR_SIZE, 0);
-
-    // Having an alignment offset > alignment doesn't really make sense.
-    ASSERT_LT(device_info.alignment_offset, device_info.alignment);
-}
-
 TEST_F(BuilderTest, UpdateBlockDeviceInfo) {
     BlockDeviceInfo device_info("super", 1024 * 1024, 4096, 1024, 4096);
     unique_ptr<MetadataBuilder> builder = MetadataBuilder::New(device_info, 1024, 1);
@@ -621,13 +593,6 @@
     ASSERT_NE(builder->Export(), nullptr);
 }
 
-constexpr unsigned long long operator"" _GiB(unsigned long long x) {  // NOLINT
-    return x << 30;
-}
-constexpr unsigned long long operator"" _MiB(unsigned long long x) {  // NOLINT
-    return x << 20;
-}
-
 TEST_F(BuilderTest, RemoveAndAddFirstPartition) {
     auto builder = MetadataBuilder::New(10_GiB, 65536, 2);
     ASSERT_NE(nullptr, builder);
@@ -789,7 +754,7 @@
 
     // A and B slots should be allocated from separate halves of the partition,
     // to mitigate allocating too many extents. (b/120433288)
-    ON_CALL(*GetMockedInstance(), GetProperty("ro.boot.slot_suffix", _))
+    ON_CALL(*GetMockedPropertyFetcher(), GetProperty("ro.boot.slot_suffix", _))
             .WillByDefault(Return("_a"));
 
     auto builder = MetadataBuilder::New(device_info, 65536, 2);
@@ -917,3 +882,38 @@
     std::set<std::string> partitions_to_keep{"system_a", "vendor_a", "product_a"};
     ASSERT_TRUE(builder->ImportPartitions(*on_disk.get(), partitions_to_keep));
 }
+
+// Interval has operator< defined; it is not appropriate to re-define Interval::operator== that
+// compares device index.
+namespace android {
+namespace fs_mgr {
+bool operator==(const Interval& a, const Interval& b) {
+    return a.device_index == b.device_index && a.start == b.start && a.end == b.end;
+}
+}  // namespace fs_mgr
+}  // namespace android
+
+TEST_F(BuilderTest, Interval) {
+    EXPECT_EQ(0u, Interval::Intersect(Interval(0, 100, 200), Interval(0, 50, 100)).length());
+    EXPECT_EQ(Interval(0, 100, 150),
+              Interval::Intersect(Interval(0, 100, 200), Interval(0, 50, 150)));
+    EXPECT_EQ(Interval(0, 100, 200),
+              Interval::Intersect(Interval(0, 100, 200), Interval(0, 50, 200)));
+    EXPECT_EQ(Interval(0, 100, 200),
+              Interval::Intersect(Interval(0, 100, 200), Interval(0, 50, 250)));
+    EXPECT_EQ(Interval(0, 100, 200),
+              Interval::Intersect(Interval(0, 100, 200), Interval(0, 100, 200)));
+    EXPECT_EQ(Interval(0, 150, 200),
+              Interval::Intersect(Interval(0, 100, 200), Interval(0, 150, 250)));
+    EXPECT_EQ(0u, Interval::Intersect(Interval(0, 100, 200), Interval(0, 200, 250)).length());
+
+    auto v = Interval::Intersect(std::vector<Interval>{Interval(0, 0, 50), Interval(0, 100, 150)},
+                                 std::vector<Interval>{Interval(0, 25, 125)});
+    ASSERT_EQ(2, v.size());
+    EXPECT_EQ(Interval(0, 25, 50), v[0]);
+    EXPECT_EQ(Interval(0, 100, 125), v[1]);
+
+    EXPECT_EQ(0u, Interval::Intersect(std::vector<Interval>{Interval(0, 0, 50)},
+                                      std::vector<Interval>{Interval(0, 100, 150)})
+                          .size());
+}
diff --git a/fs_mgr/liblp/device_test.cpp b/fs_mgr/liblp/device_test.cpp
new file mode 100644
index 0000000..382d53d
--- /dev/null
+++ b/fs_mgr/liblp/device_test.cpp
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <android-base/properties.h>
+#include <fs_mgr.h>
+#include <fstab/fstab.h>
+#include <gtest/gtest.h>
+#include <liblp/liblp.h>
+#include <liblp/metadata_format.h>
+#include <liblp/partition_opener.h>
+#include <liblp/property_fetcher.h>
+
+#include "liblp_test.h"
+
+using namespace android::fs_mgr;
+using namespace android::fs_mgr::testing;
+using ::testing::Return;
+
+// Compliance test on the actual device with dynamic partitions.
+class DeviceTest : public LiblpTest {
+  public:
+    void SetUp() override {
+        // Read real properties.
+        IPropertyFetcher::OverrideForTesting(std::make_unique<PropertyFetcher>());
+        if (!IPropertyFetcher::GetInstance()->GetBoolProperty("ro.boot.dynamic_partitions",
+                                                              false)) {
+            GTEST_SKIP() << "Device doesn't have dynamic partitions enabled, skipping";
+        }
+    }
+};
+
+TEST_F(DeviceTest, BlockDeviceInfo) {
+    PartitionOpener opener;
+    BlockDeviceInfo device_info;
+    ASSERT_TRUE(opener.GetInfo(fs_mgr_get_super_partition_name(), &device_info));
+
+    // Sanity check that the device doesn't give us some weird inefficient
+    // alignment.
+    EXPECT_EQ(device_info.alignment % LP_SECTOR_SIZE, 0);
+    EXPECT_EQ(device_info.alignment_offset % LP_SECTOR_SIZE, 0);
+    EXPECT_LE(device_info.alignment_offset, INT_MAX);
+    EXPECT_EQ(device_info.logical_block_size % LP_SECTOR_SIZE, 0);
+
+    // Having an alignment offset > alignment doesn't really make sense.
+    EXPECT_LT(device_info.alignment_offset, device_info.alignment);
+}
+
+TEST_F(DeviceTest, ReadSuperPartitionCurrentSlot) {
+    auto slot_suffix = fs_mgr_get_slot_suffix();
+    auto slot_number = SlotNumberForSlotSuffix(slot_suffix);
+    auto super_name = fs_mgr_get_super_partition_name(slot_number);
+    auto metadata = ReadMetadata(super_name, slot_number);
+    EXPECT_NE(metadata, nullptr);
+}
+
+TEST_F(DeviceTest, ReadSuperPartitionOtherSlot) {
+    auto other_slot_suffix = fs_mgr_get_other_slot_suffix();
+    if (other_slot_suffix.empty()) {
+        GTEST_SKIP() << "No other slot, skipping";
+    }
+    if (IPropertyFetcher::GetInstance()->GetBoolProperty("ro.boot.dynamic_partitions_retrofit",
+                                                         false)) {
+        GTEST_SKIP() << "Device with retrofit dynamic partition may not have metadata at other "
+                     << "slot, skipping";
+    }
+
+    auto other_slot_number = SlotNumberForSlotSuffix(other_slot_suffix);
+    auto other_super_name = fs_mgr_get_super_partition_name(other_slot_number);
+    auto other_metadata = ReadMetadata(other_super_name, other_slot_number);
+    EXPECT_NE(other_metadata, nullptr);
+}
diff --git a/fs_mgr/liblp/images.cpp b/fs_mgr/liblp/images.cpp
index 58a88b5..e4d92ca 100644
--- a/fs_mgr/liblp/images.cpp
+++ b/fs_mgr/liblp/images.cpp
@@ -17,6 +17,7 @@
 #include "images.h"
 
 #include <limits.h>
+#include <sys/stat.h>
 
 #include <android-base/file.h>
 
@@ -27,12 +28,45 @@
 namespace android {
 namespace fs_mgr {
 
+using android::base::borrowed_fd;
 using android::base::unique_fd;
 
 #if defined(_WIN32)
 static const int O_NOFOLLOW = 0;
 #endif
 
+static bool IsEmptySuperImage(borrowed_fd fd) {
+    struct stat s;
+    if (fstat(fd.get(), &s) < 0) {
+        PERROR << __PRETTY_FUNCTION__ << " fstat failed";
+        return false;
+    }
+    if (s.st_size < LP_METADATA_GEOMETRY_SIZE) {
+        return false;
+    }
+
+    // Rewind back to the start, read the geometry struct.
+    LpMetadataGeometry geometry = {};
+    if (SeekFile64(fd.get(), 0, SEEK_SET) < 0) {
+        PERROR << __PRETTY_FUNCTION__ << " lseek failed";
+        return false;
+    }
+    if (!android::base::ReadFully(fd, &geometry, sizeof(geometry))) {
+        PERROR << __PRETTY_FUNCTION__ << " read failed";
+        return false;
+    }
+    return geometry.magic == LP_METADATA_GEOMETRY_MAGIC;
+}
+
+bool IsEmptySuperImage(const std::string& file) {
+    unique_fd fd = GetControlFileOrOpen(file, O_RDONLY | O_CLOEXEC);
+    if (fd < 0) {
+        PERROR << __PRETTY_FUNCTION__ << " open failed";
+        return false;
+    }
+    return IsEmptySuperImage(fd);
+}
+
 std::unique_ptr<LpMetadata> ReadFromImageFile(int fd) {
     std::unique_ptr<uint8_t[]> buffer = std::make_unique<uint8_t[]>(LP_METADATA_GEOMETRY_SIZE);
     if (SeekFile64(fd, 0, SEEK_SET) < 0) {
@@ -76,7 +110,7 @@
     return ReadFromImageFile(fd);
 }
 
-bool WriteToImageFile(int fd, const LpMetadata& input) {
+bool WriteToImageFile(borrowed_fd fd, const LpMetadata& input) {
     std::string geometry = SerializeGeometry(input.geometry);
     std::string metadata = SerializeMetadata(input);
 
diff --git a/fs_mgr/liblp/images.h b/fs_mgr/liblp/images.h
index a284d2e..88e5882 100644
--- a/fs_mgr/liblp/images.h
+++ b/fs_mgr/liblp/images.h
@@ -29,8 +29,6 @@
 // Helper function to serialize geometry and metadata to a normal file, for
 // flashing or debugging.
 std::unique_ptr<LpMetadata> ReadFromImageFile(int fd);
-bool WriteToImageFile(const char* file, const LpMetadata& metadata);
-bool WriteToImageFile(int fd, const LpMetadata& metadata);
 
 // We use an object to build the image file since it requires that data
 // pointers be held alive until the sparse file is destroyed. It's easier
diff --git a/fs_mgr/liblp/include/liblp/builder.h b/fs_mgr/liblp/include/liblp/builder.h
index 3b229bd..1e9d636 100644
--- a/fs_mgr/liblp/include/liblp/builder.h
+++ b/fs_mgr/liblp/include/liblp/builder.h
@@ -33,10 +33,11 @@
 namespace fs_mgr {
 
 class LinearExtent;
+struct Interval;
 
 // By default, partitions are aligned on a 1MiB boundary.
-static const uint32_t kDefaultPartitionAlignment = 1024 * 1024;
-static const uint32_t kDefaultBlockSize = 4096;
+static constexpr uint32_t kDefaultPartitionAlignment = 1024 * 1024;
+static constexpr uint32_t kDefaultBlockSize = 4096;
 
 // Name of the default group in a metadata.
 static constexpr std::string_view kDefaultGroup = "default";
@@ -74,6 +75,8 @@
         return sector >= physical_sector_ && sector < end_sector();
     }
 
+    Interval AsInterval() const;
+
   private:
     uint32_t device_index_;
     uint64_t physical_sector_;
@@ -91,7 +94,7 @@
     friend class MetadataBuilder;
 
   public:
-    explicit PartitionGroup(const std::string& name, uint64_t maximum_size)
+    explicit PartitionGroup(std::string_view name, uint64_t maximum_size)
         : name_(name), maximum_size_(maximum_size) {}
 
     const std::string& name() const { return name_; }
@@ -108,7 +111,7 @@
     friend class MetadataBuilder;
 
   public:
-    Partition(const std::string& name, const std::string& group_name, uint32_t attributes);
+    Partition(std::string_view name, std::string_view group_name, uint32_t attributes);
 
     // Add a raw extent.
     void AddExtent(std::unique_ptr<Extent>&& extent);
@@ -123,12 +126,19 @@
     const std::string& name() const { return name_; }
     const std::string& group_name() const { return group_name_; }
     uint32_t attributes() const { return attributes_; }
+    void set_attributes(uint32_t attributes) { attributes_ = attributes; }
     const std::vector<std::unique_ptr<Extent>>& extents() const { return extents_; }
     uint64_t size() const { return size_; }
 
+    // Return a copy of *this, but with extents that includes only the first
+    // |aligned_size| bytes. |aligned_size| should be aligned to
+    // logical_block_size() of the MetadataBuilder that this partition belongs
+    // to.
+    Partition GetBeginningExtents(uint64_t aligned_size) const;
+
   private:
     void ShrinkTo(uint64_t aligned_size);
-    void set_group_name(const std::string& group_name) { group_name_ = group_name; }
+    void set_group_name(std::string_view group_name) { group_name_ = group_name; }
 
     std::string name_;
     std::string group_name_;
@@ -137,6 +147,35 @@
     uint64_t size_;
 };
 
+// An interval in the metadata. This is similar to a LinearExtent with one difference.
+// LinearExtent represents a "used" region in the metadata, while Interval can also represent
+// an "unused" region.
+struct Interval {
+    uint32_t device_index;
+    uint64_t start;
+    uint64_t end;
+
+    Interval(uint32_t device_index, uint64_t start, uint64_t end)
+        : device_index(device_index), start(start), end(end) {}
+    uint64_t length() const { return end - start; }
+
+    // Note: the device index is not included in sorting (intervals are
+    // sorted in per-device lists).
+    bool operator<(const Interval& other) const {
+        return (start == other.start) ? end < other.end : start < other.start;
+    }
+
+    std::unique_ptr<Extent> AsExtent() const;
+
+    // Intersect |a| with |b|.
+    // If no intersection, result has 0 length().
+    static Interval Intersect(const Interval& a, const Interval& b);
+
+    // Intersect two lists of intervals, and store result to |a|.
+    static std::vector<Interval> Intersect(const std::vector<Interval>& a,
+                                           const std::vector<Interval>& b);
+};
+
 class MetadataBuilder {
   public:
     // Construct an empty logical partition table builder given the specified
@@ -170,10 +209,13 @@
     // metadata may not have the target slot's devices listed yet, in which
     // case, it is automatically upgraded to include all available block
     // devices.
+    // If |always_keep_source_slot| is set, on a Virtual A/B device, source slot
+    // partitions are kept. This is useful when applying a downgrade package.
     static std::unique_ptr<MetadataBuilder> NewForUpdate(const IPartitionOpener& opener,
                                                          const std::string& source_partition,
                                                          uint32_t source_slot_number,
-                                                         uint32_t target_slot_number);
+                                                         uint32_t target_slot_number,
+                                                         bool always_keep_source_slot = false);
 
     // Import an existing table for modification. If the table is not valid, for
     // example it contains duplicate partition names, then nullptr is returned.
@@ -205,7 +247,7 @@
     // total space used by all partitions in the group.
     //
     // This can fail and return false if the group already exists.
-    bool AddGroup(const std::string& group_name, uint64_t maximum_size);
+    bool AddGroup(std::string_view group_name, uint64_t maximum_size);
 
     // Export metadata so it can be serialized to an image, to disk, or mounted
     // via device-mapper.
@@ -213,7 +255,7 @@
 
     // Add a partition, returning a handle so it can be sized as needed. If a
     // partition with the given name already exists, nullptr is returned.
-    Partition* AddPartition(const std::string& name, const std::string& group_name,
+    Partition* AddPartition(std::string_view name, std::string_view group_name,
                             uint32_t attributes);
 
     // Same as AddPartition above, but uses the default partition group which
@@ -221,13 +263,13 @@
     Partition* AddPartition(const std::string& name, uint32_t attributes);
 
     // Delete a partition by name if it exists.
-    void RemovePartition(const std::string& name);
+    void RemovePartition(std::string_view name);
 
     // Find a partition by name. If no partition is found, nullptr is returned.
-    Partition* FindPartition(const std::string& name);
+    Partition* FindPartition(std::string_view name);
 
     // Find a group by name. If no group is found, nullptr is returned.
-    PartitionGroup* FindGroup(const std::string& name);
+    PartitionGroup* FindGroup(std::string_view name);
 
     // Add a predetermined extent to a partition.
     bool AddLinearExtent(Partition* partition, const std::string& block_device,
@@ -243,16 +285,20 @@
     //
     // Note, this is an in-memory operation, and it does not alter the
     // underlying filesystem or contents of the partition on disk.
-    bool ResizePartition(Partition* partition, uint64_t requested_size);
+    //
+    // If |free_region_hint| is not empty, it will only try to allocate extents
+    // in regions within the list.
+    bool ResizePartition(Partition* partition, uint64_t requested_size,
+                         const std::vector<Interval>& free_region_hint = {});
 
     // Return the list of partitions belonging to a group.
-    std::vector<Partition*> ListPartitionsInGroup(const std::string& group_name);
+    std::vector<Partition*> ListPartitionsInGroup(std::string_view group_name);
 
     // Changes a partition's group. Size constraints will not be checked until
     // the metadata is exported, to avoid errors during potential group and
     // size shuffling operations. This will return false if the new group does
     // not exist.
-    bool ChangePartitionGroup(Partition* partition, const std::string& group_name);
+    bool ChangePartitionGroup(Partition* partition, std::string_view group_name);
 
     // Changes the size of a partition group. Size constraints will not be
     // checked until metadata is exported, to avoid errors during group
@@ -268,7 +314,7 @@
     std::vector<std::string> ListGroups() const;
 
     // Remove all partitions belonging to a group, then remove the group.
-    void RemoveGroupAndPartitions(const std::string& group_name);
+    void RemoveGroupAndPartitions(std::string_view group_name);
 
     // Set the LP_METADATA_AUTO_SLOT_SUFFIXING flag.
     void SetAutoSlotSuffixing();
@@ -287,6 +333,14 @@
     // Return true if a block device is found, else false.
     bool HasBlockDevice(const std::string& partition_name) const;
 
+    // Return the name of the block device at |index|.
+    std::string GetBlockDevicePartitionName(uint64_t index) const;
+
+    // Return the list of free regions not occupied by extents in the metadata.
+    std::vector<Interval> GetFreeRegions() const;
+
+    uint64_t logical_block_size() const;
+
   private:
     MetadataBuilder();
     MetadataBuilder(const MetadataBuilder&) = delete;
@@ -296,7 +350,8 @@
     bool Init(const std::vector<BlockDeviceInfo>& block_devices, const std::string& super_partition,
               uint32_t metadata_max_size, uint32_t metadata_slot_count);
     bool Init(const LpMetadata& metadata);
-    bool GrowPartition(Partition* partition, uint64_t aligned_size);
+    bool GrowPartition(Partition* partition, uint64_t aligned_size,
+                       const std::vector<Interval>& free_region_hint);
     void ShrinkPartition(Partition* partition, uint64_t aligned_size);
     uint64_t AlignSector(const LpMetadataBlockDevice& device, uint64_t sector) const;
     uint64_t TotalSizeOfGroup(PartitionGroup* group) const;
@@ -314,27 +369,11 @@
     // Return true if the device is retrofitting dynamic partitions.
     static bool IsRetrofitDynamicPartitionsDevice();
 
-    // Return true if "this" metadata represents a metadata on a retrofit device.
-    bool IsRetrofitMetadata() const;
+    // Return true if _b partitions should be prioritized at the second half of the device.
+    bool ShouldHalveSuper() const;
 
     bool ValidatePartitionGroups() const;
 
-    struct Interval {
-        uint32_t device_index;
-        uint64_t start;
-        uint64_t end;
-
-        Interval(uint32_t device_index, uint64_t start, uint64_t end)
-            : device_index(device_index), start(start), end(end) {}
-        uint64_t length() const { return end - start; }
-
-        // Note: the device index is not included in sorting (intervals are
-        // sorted in per-device lists).
-        bool operator<(const Interval& other) const {
-            return (start == other.start) ? end < other.end : start < other.start;
-        }
-    };
-    std::vector<Interval> GetFreeRegions() const;
     bool IsAnyRegionCovered(const std::vector<Interval>& regions,
                             const LinearExtent& candidate) const;
     bool IsAnyRegionAllocated(const LinearExtent& candidate) const;
diff --git a/fs_mgr/liblp/include/liblp/liblp.h b/fs_mgr/liblp/include/liblp/liblp.h
index 135a1b3..04f8987 100644
--- a/fs_mgr/liblp/include/liblp/liblp.h
+++ b/fs_mgr/liblp/include/liblp/liblp.h
@@ -70,11 +70,21 @@
                           uint32_t slot_number);
 std::unique_ptr<LpMetadata> ReadMetadata(const std::string& super_partition, uint32_t slot_number);
 
-// Read/Write logical partition metadata to an image file, for diagnostics or
+// Returns whether an image is an "empty" image or not. An empty image contains
+// only metadata. Unlike a flashed block device, there are no reserved bytes or
+// backup sections, and only one slot is stored (even if multiple slots are
+// supported). It is a format specifically for storing only metadata.
+bool IsEmptySuperImage(const std::string& file);
+
+// Read/Write logical partition metadata and contents to an image file, for
 // flashing.
 bool WriteToImageFile(const std::string& file, const LpMetadata& metadata, uint32_t block_size,
                       const std::map<std::string, std::string>& images, bool sparsify);
+
+// Read/Write logical partition metadata to an image file, for producing a
+// super_empty.img (for fastboot wipe-super/update-super) or for diagnostics.
 bool WriteToImageFile(const std::string& file, const LpMetadata& metadata);
+bool WriteToImageFile(android::base::borrowed_fd fd, const LpMetadata& metadata);
 std::unique_ptr<LpMetadata> ReadFromImageFile(const std::string& image_file);
 std::unique_ptr<LpMetadata> ReadFromImageBlob(const void* data, size_t bytes);
 
diff --git a/fs_mgr/liblp/include/liblp/metadata_format.h b/fs_mgr/liblp/include/liblp/metadata_format.h
index 8934aaf..6e928b4 100644
--- a/fs_mgr/liblp/include/liblp/metadata_format.h
+++ b/fs_mgr/liblp/include/liblp/metadata_format.h
@@ -39,7 +39,11 @@
 
 /* Current metadata version. */
 #define LP_METADATA_MAJOR_VERSION 10
-#define LP_METADATA_MINOR_VERSION 0
+#define LP_METADATA_MINOR_VERSION_MIN 0
+#define LP_METADATA_MINOR_VERSION_MAX 1
+
+/* Metadata version needed to use the UPDATED partition attribute. */
+#define LP_METADATA_VERSION_FOR_UPDATED_ATTR 1
 
 /* Attributes for the LpMetadataPartition::attributes field.
  *
@@ -58,8 +62,20 @@
  */
 #define LP_PARTITION_ATTR_SLOT_SUFFIXED (1 << 1)
 
-/* Mask that defines all valid attributes. */
-#define LP_PARTITION_ATTRIBUTE_MASK (LP_PARTITION_ATTR_READONLY | LP_PARTITION_ATTR_SLOT_SUFFIXED)
+/* This flag is applied automatically when using MetadataBuilder::NewForUpdate.
+ * It signals that the partition was created (or modified) for a snapshot-based
+ * update. If this flag is not present, the partition was likely flashed via
+ * fastboot.
+ */
+#define LP_PARTITION_ATTR_UPDATED (1 << 2)
+
+/* Mask that defines all valid attributes. When changing this, make sure to
+ * update ParseMetadata().
+ */
+#define LP_PARTITION_ATTRIBUTE_MASK_V0 \
+    (LP_PARTITION_ATTR_READONLY | LP_PARTITION_ATTR_SLOT_SUFFIXED)
+#define LP_PARTITION_ATTRIBUTE_MASK_V1 (LP_PARTITION_ATTRIBUTE_MASK_V0 | LP_PARTITION_ATTR_UPDATED)
+#define LP_PARTITION_ATTRIBUTE_MASK LP_PARTITION_ATTRIBUTE_MASK_V1
 
 /* Default name of the physical partition that holds logical partition entries.
  * The layout of this partition will look like:
diff --git a/fs_mgr/liblp/mock_property_fetcher.h b/fs_mgr/liblp/include/liblp/mock_property_fetcher.h
similarity index 79%
rename from fs_mgr/liblp/mock_property_fetcher.h
rename to fs_mgr/liblp/include/liblp/mock_property_fetcher.h
index eb91de2..f15611b 100644
--- a/fs_mgr/liblp/mock_property_fetcher.h
+++ b/fs_mgr/liblp/include/liblp/mock_property_fetcher.h
@@ -22,6 +22,7 @@
 
 namespace android {
 namespace fs_mgr {
+namespace testing {
 
 class MockPropertyFetcher : public IPropertyFetcher {
   public:
@@ -41,7 +42,15 @@
     }
 };
 
+static inline void ResetMockPropertyFetcher() {
+    IPropertyFetcher::OverrideForTesting(
+            std::make_unique<::testing::NiceMock<MockPropertyFetcher>>());
+}
+
+static inline MockPropertyFetcher* GetMockedPropertyFetcher() {
+    return static_cast<MockPropertyFetcher*>(IPropertyFetcher::GetInstance());
+}
+
+}  // namespace testing
 }  // namespace fs_mgr
 }  // namespace android
-
-android::fs_mgr::MockPropertyFetcher* GetMockedInstance();
diff --git a/fs_mgr/liblp/include/liblp/partition_opener.h b/fs_mgr/liblp/include/liblp/partition_opener.h
index e506bd5..7c9100b 100644
--- a/fs_mgr/liblp/include/liblp/partition_opener.h
+++ b/fs_mgr/liblp/include/liblp/partition_opener.h
@@ -62,6 +62,11 @@
     // Return block device information about the given named physical partition.
     // The name can be an absolute path if the full path is already known.
     virtual bool GetInfo(const std::string& partition_name, BlockDeviceInfo* info) const = 0;
+
+    // Return a path that can be used to pass the block device to device-mapper.
+    // This must either result in an absolute path, or a major:minor device
+    // sequence.
+    virtual std::string GetDeviceString(const std::string& partition_name) const = 0;
 };
 
 // Helper class to implement IPartitionOpener. If |partition_name| is not an
@@ -71,6 +76,7 @@
     virtual android::base::unique_fd Open(const std::string& partition_name,
                                           int flags) const override;
     virtual bool GetInfo(const std::string& partition_name, BlockDeviceInfo* info) const override;
+    virtual std::string GetDeviceString(const std::string& partition_name) const override;
 };
 
 }  // namespace fs_mgr
diff --git a/fs_mgr/liblp/io_test.cpp b/fs_mgr/liblp/io_test.cpp
index 2990863..22f6746 100644
--- a/fs_mgr/liblp/io_test.cpp
+++ b/fs_mgr/liblp/io_test.cpp
@@ -21,14 +21,12 @@
 
 #include <android-base/file.h>
 #include <android-base/unique_fd.h>
-#include <fs_mgr.h>
-#include <fstab/fstab.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 #include <liblp/builder.h>
 
 #include "images.h"
-#include "mock_property_fetcher.h"
+#include "liblp_test.h"
 #include "reader.h"
 #include "test_partition_opener.h"
 #include "utility.h"
@@ -36,6 +34,7 @@
 
 using namespace std;
 using namespace android::fs_mgr;
+using namespace android::fs_mgr::testing;
 using ::testing::_;
 using ::testing::Return;
 using unique_fd = android::base::unique_fd;
@@ -124,7 +123,7 @@
 }
 
 // Test that our CreateFakeDisk() function works.
-TEST(liblp, CreateFakeDisk) {
+TEST_F(LiblpTest, CreateFakeDisk) {
     unique_fd fd = CreateFakeDisk();
     ASSERT_GE(fd, 0);
 
@@ -140,7 +139,7 @@
 
 // Flashing metadata should not work if the metadata was created for a larger
 // disk than the destination disk.
-TEST(liblp, ExportDiskTooSmall) {
+TEST_F(LiblpTest, ExportDiskTooSmall) {
     unique_ptr<MetadataBuilder> builder = MetadataBuilder::New(kDiskSize + 4096, 512, 2);
     ASSERT_NE(builder, nullptr);
     unique_ptr<LpMetadata> exported = builder->Export();
@@ -157,7 +156,7 @@
 }
 
 // Test the basics of flashing a partition and reading it back.
-TEST(liblp, FlashAndReadback) {
+TEST_F(LiblpTest, FlashAndReadback) {
     unique_ptr<MetadataBuilder> builder = CreateDefaultBuilder();
     ASSERT_NE(builder, nullptr);
     ASSERT_TRUE(AddDefaultPartitions(builder.get()));
@@ -207,7 +206,7 @@
 }
 
 // Test that we can update metadata slots without disturbing others.
-TEST(liblp, UpdateAnyMetadataSlot) {
+TEST_F(LiblpTest, UpdateAnyMetadataSlot) {
     unique_fd fd = CreateFlashedDisk();
     ASSERT_GE(fd, 0);
 
@@ -252,7 +251,7 @@
     }
 }
 
-TEST(liblp, InvalidMetadataSlot) {
+TEST_F(LiblpTest, InvalidMetadataSlot) {
     unique_fd fd = CreateFlashedDisk();
     ASSERT_GE(fd, 0);
 
@@ -271,7 +270,7 @@
 
 // Test that updating a metadata slot does not allow it to be computed based
 // on mismatching geometry.
-TEST(liblp, NoChangingGeometry) {
+TEST_F(LiblpTest, NoChangingGeometry) {
     unique_fd fd = CreateFlashedDisk();
     ASSERT_GE(fd, 0);
 
@@ -300,7 +299,7 @@
 }
 
 // Test that changing one bit of metadata is enough to break the checksum.
-TEST(liblp, BitFlipGeometry) {
+TEST_F(LiblpTest, BitFlipGeometry) {
     unique_fd fd = CreateFlashedDisk();
     ASSERT_GE(fd, 0);
 
@@ -319,7 +318,7 @@
     EXPECT_EQ(metadata->geometry.metadata_slot_count, 2);
 }
 
-TEST(liblp, ReadBackupGeometry) {
+TEST_F(LiblpTest, ReadBackupGeometry) {
     unique_fd fd = CreateFlashedDisk();
     ASSERT_GE(fd, 0);
 
@@ -339,7 +338,7 @@
     EXPECT_EQ(ReadMetadata(opener, "super", 0), nullptr);
 }
 
-TEST(liblp, ReadBackupMetadata) {
+TEST_F(LiblpTest, ReadBackupMetadata) {
     unique_fd fd = CreateFlashedDisk();
     ASSERT_GE(fd, 0);
 
@@ -366,7 +365,7 @@
 
 // Test that we don't attempt to write metadata if it would overflow its
 // reserved space.
-TEST(liblp, TooManyPartitions) {
+TEST_F(LiblpTest, TooManyPartitions) {
     unique_ptr<MetadataBuilder> builder = CreateDefaultBuilder();
     ASSERT_NE(builder, nullptr);
 
@@ -420,7 +419,7 @@
 }
 
 // Test that we can read and write image files.
-TEST(liblp, ImageFiles) {
+TEST_F(LiblpTest, ImageFiles) {
     unique_ptr<MetadataBuilder> builder = CreateDefaultBuilder();
     ASSERT_NE(builder, nullptr);
     ASSERT_TRUE(AddDefaultPartitions(builder.get()));
@@ -436,7 +435,7 @@
 }
 
 // Test that we can read images from buffers.
-TEST(liblp, ImageFilesInMemory) {
+TEST_F(LiblpTest, ImageFilesInMemory) {
     unique_ptr<MetadataBuilder> builder = CreateDefaultBuilder();
     ASSERT_NE(builder, nullptr);
     ASSERT_TRUE(AddDefaultPartitions(builder.get()));
@@ -496,7 +495,7 @@
 
 // Test that an interrupted flash operation on the "primary" copy of metadata
 // is not fatal.
-TEST(liblp, UpdatePrimaryMetadataFailure) {
+TEST_F(LiblpTest, UpdatePrimaryMetadataFailure) {
     unique_fd fd = CreateFlashedDisk();
     ASSERT_GE(fd, 0);
 
@@ -524,7 +523,7 @@
 
 // Test that an interrupted flash operation on the "backup" copy of metadata
 // is not fatal.
-TEST(liblp, UpdateBackupMetadataFailure) {
+TEST_F(LiblpTest, UpdateBackupMetadataFailure) {
     unique_fd fd = CreateFlashedDisk();
     ASSERT_GE(fd, 0);
 
@@ -553,7 +552,7 @@
 // Test that an interrupted write *in between* writing metadata will read
 // the correct metadata copy. The primary is always considered newer than
 // the backup.
-TEST(liblp, UpdateMetadataCleanFailure) {
+TEST_F(LiblpTest, UpdateMetadataCleanFailure) {
     unique_fd fd = CreateFlashedDisk();
     ASSERT_GE(fd, 0);
 
@@ -590,7 +589,7 @@
 }
 
 // Test that writing a sparse image can be read back.
-TEST(liblp, FlashSparseImage) {
+TEST_F(LiblpTest, FlashSparseImage) {
     unique_fd fd = CreateFakeDisk();
     ASSERT_GE(fd, 0);
 
@@ -624,7 +623,7 @@
     ASSERT_NE(ReadBackupMetadata(fd.get(), geometry, 0), nullptr);
 }
 
-TEST(liblp, AutoSlotSuffixing) {
+TEST_F(LiblpTest, AutoSlotSuffixing) {
     unique_ptr<MetadataBuilder> builder = CreateDefaultBuilder();
     ASSERT_NE(builder, nullptr);
     ASSERT_TRUE(AddDefaultPartitions(builder.get()));
@@ -667,8 +666,8 @@
     EXPECT_EQ(metadata->groups[1].flags, 0);
 }
 
-TEST(liblp, UpdateRetrofit) {
-    ON_CALL(*GetMockedInstance(), GetBoolProperty("ro.boot.dynamic_partitions_retrofit", _))
+TEST_F(LiblpTest, UpdateRetrofit) {
+    ON_CALL(*GetMockedPropertyFetcher(), GetBoolProperty("ro.boot.dynamic_partitions_retrofit", _))
             .WillByDefault(Return(true));
 
     unique_ptr<MetadataBuilder> builder = CreateDefaultBuilder();
@@ -699,8 +698,8 @@
     ASSERT_TRUE(updated->extents.empty());
 }
 
-TEST(liblp, UpdateNonRetrofit) {
-    ON_CALL(*GetMockedInstance(), GetBoolProperty("ro.boot.dynamic_partitions_retrofit", _))
+TEST_F(LiblpTest, UpdateNonRetrofit) {
+    ON_CALL(*GetMockedPropertyFetcher(), GetBoolProperty("ro.boot.dynamic_partitions_retrofit", _))
             .WillByDefault(Return(false));
 
     unique_fd fd = CreateFlashedDisk();
@@ -715,18 +714,31 @@
     EXPECT_EQ(GetBlockDevicePartitionName(updated->block_devices[0]), "super");
 }
 
-TEST(liblp, ReadSuperPartition) {
-    auto slot_suffix = fs_mgr_get_slot_suffix();
-    auto slot_number = SlotNumberForSlotSuffix(slot_suffix);
-    auto super_name = fs_mgr_get_super_partition_name(slot_number);
-    auto metadata = ReadMetadata(super_name, slot_number);
-    ASSERT_NE(metadata, nullptr);
+TEST_F(LiblpTest, UpdateVirtualAB) {
+    ON_CALL(*GetMockedPropertyFetcher(), GetBoolProperty("ro.virtual_ab.enabled", _))
+            .WillByDefault(Return(true));
 
-    if (!slot_suffix.empty()) {
-        auto other_slot_suffix = fs_mgr_get_other_slot_suffix();
-        auto other_slot_number = SlotNumberForSlotSuffix(other_slot_suffix);
-        auto other_super_name = fs_mgr_get_super_partition_name(other_slot_number);
-        auto other_metadata = ReadMetadata(other_super_name, other_slot_number);
-        ASSERT_NE(other_metadata, nullptr);
-    }
+    unique_fd fd = CreateFlashedDisk();
+    ASSERT_GE(fd, 0);
+
+    DefaultPartitionOpener opener(fd);
+    auto builder = MetadataBuilder::NewForUpdate(opener, "super", 0, 1);
+    ASSERT_NE(builder, nullptr);
+    auto updated = builder->Export();
+    ASSERT_NE(updated, nullptr);
+    ASSERT_TRUE(UpdatePartitionTable(opener, "super", *updated.get(), 1));
+
+    // Validate old slot.
+    auto metadata = ReadMetadata(opener, "super", 0);
+    ASSERT_NE(metadata, nullptr);
+    ASSERT_EQ(metadata->header.minor_version, 0);
+    ASSERT_GE(metadata->partitions.size(), 1);
+    ASSERT_EQ(metadata->partitions[0].attributes & LP_PARTITION_ATTR_UPDATED, 0);
+
+    // Validate new slot.
+    metadata = ReadMetadata(opener, "super", 1);
+    ASSERT_NE(metadata, nullptr);
+    ASSERT_EQ(metadata->header.minor_version, 1);
+    ASSERT_GE(metadata->partitions.size(), 1);
+    ASSERT_NE(metadata->partitions[0].attributes & LP_PARTITION_ATTR_UPDATED, 0);
 }
diff --git a/libmeminfo/vts/vts_meminfo_test.cpp b/fs_mgr/liblp/liblp_test.h
similarity index 68%
rename from libmeminfo/vts/vts_meminfo_test.cpp
rename to fs_mgr/liblp/liblp_test.h
index 3193c31..c61aaa5 100644
--- a/libmeminfo/vts/vts_meminfo_test.cpp
+++ b/fs_mgr/liblp/liblp_test.h
@@ -14,18 +14,22 @@
  * limitations under the License.
  */
 
+#pragma once
+
 #include <gtest/gtest.h>
 
-#include <meminfo/procmeminfo.h>
+#include <liblp/mock_property_fetcher.h>
 
 namespace android {
-namespace meminfo {
+namespace fs_mgr {
+namespace testing {
 
-// /proc/<pid>/smaps_rollup support is required.
-TEST(SmapsRollup, IsSupported) {
-    // Use init's pid for this test since it's the only known pid.
-    ASSERT_TRUE(IsSmapsRollupSupported(1));
-}
+class LiblpTest : public ::testing::Test {
+  public:
+    void SetUp() override { ResetMockPropertyFetcher(); }
+    void TearDown() override { ResetMockPropertyFetcher(); }
+};
 
-}  // namespace meminfo
+}  // namespace testing
+}  // namespace fs_mgr
 }  // namespace android
diff --git a/libmemunreachable/tests/AndroidTest.xml b/fs_mgr/liblp/liblp_test.xml
similarity index 70%
rename from libmemunreachable/tests/AndroidTest.xml
rename to fs_mgr/liblp/liblp_test.xml
index 604c0ec..d9ee12e 100644
--- a/libmemunreachable/tests/AndroidTest.xml
+++ b/fs_mgr/liblp/liblp_test.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2017 The Android Open Source Project
+<!-- Copyright (C) 2019 The Android Open Source Project
 
      Licensed under the Apache License, Version 2.0 (the "License");
      you may not use this file except in compliance with the License.
@@ -13,14 +13,15 @@
      See the License for the specific language governing permissions and
      limitations under the License.
 -->
-<configuration description="Config for memunreachable_test">
+<configuration description="Config for liblp_test">
+    <target_preparer class="com.android.tradefed.targetprep.RootTargetPreparer"/>
     <target_preparer class="com.android.tradefed.targetprep.PushFilePreparer">
         <option name="cleanup" value="true" />
-        <option name="push" value="memunreachable_test->/data/local/tmp/memunreachable_test" />
+        <option name="push" value="liblp_test->/data/local/tmp/liblp_test" />
     </target_preparer>
-    <option name="test-suite-tag" value="apct" />
+    <option name="test-suite-tag" value="vts-core" />
     <test class="com.android.tradefed.testtype.GTest" >
         <option name="native-test-device-path" value="/data/local/tmp" />
-        <option name="module-name" value="memunreachable_test" />
+        <option name="module-name" value="liblp_test" />
     </test>
 </configuration>
diff --git a/fs_mgr/liblp/partition_opener.cpp b/fs_mgr/liblp/partition_opener.cpp
index cc4a882..1d4db85 100644
--- a/fs_mgr/liblp/partition_opener.cpp
+++ b/fs_mgr/liblp/partition_opener.cpp
@@ -41,7 +41,21 @@
     if (android::base::StartsWith(path, "/")) {
         return path;
     }
-    return "/dev/block/by-name/" + path;
+
+    auto by_name = "/dev/block/by-name/" + path;
+    if (access(by_name.c_str(), F_OK) != 0) {
+        // If the by-name symlink doesn't exist, as a special case we allow
+        // certain devices to be used as partition names. This can happen if a
+        // Dynamic System Update is installed to an sdcard, which won't be in
+        // the boot device list.
+        //
+        // We whitelist because most devices in /dev/block are not valid for
+        // storing fiemaps.
+        if (android::base::StartsWith(path, "mmcblk")) {
+            return "/dev/block/" + path;
+        }
+    }
+    return by_name;
 }
 
 bool GetBlockDeviceInfo(const std::string& block_device, BlockDeviceInfo* device_info) {
@@ -100,5 +114,9 @@
     return GetBlockDeviceInfo(path, info);
 }
 
+std::string PartitionOpener::GetDeviceString(const std::string& partition_name) const {
+    return GetPartitionAbsolutePath(partition_name);
+}
+
 }  // namespace fs_mgr
 }  // namespace android
diff --git a/fs_mgr/liblp/reader.cpp b/fs_mgr/liblp/reader.cpp
index 8dbe955..aecf685 100644
--- a/fs_mgr/liblp/reader.cpp
+++ b/fs_mgr/liblp/reader.cpp
@@ -181,7 +181,7 @@
     }
     // Check that the version is compatible.
     if (header.major_version != LP_METADATA_MAJOR_VERSION ||
-        header.minor_version > LP_METADATA_MINOR_VERSION) {
+        header.minor_version > LP_METADATA_MINOR_VERSION_MAX) {
         LERROR << "Logical partition metadata has incompatible version.";
         return false;
     }
@@ -245,6 +245,13 @@
         return nullptr;
     }
 
+    uint32_t valid_attributes = 0;
+    if (metadata->header.minor_version >= LP_METADATA_VERSION_FOR_UPDATED_ATTR) {
+        valid_attributes = LP_PARTITION_ATTRIBUTE_MASK_V1;
+    } else {
+        valid_attributes = LP_PARTITION_ATTRIBUTE_MASK_V0;
+    }
+
     // ValidateTableSize ensured that |cursor| is valid for the number of
     // entries in the table.
     uint8_t* cursor = buffer.get() + header.partitions.offset;
@@ -253,7 +260,7 @@
         memcpy(&partition, cursor, sizeof(partition));
         cursor += header.partitions.entry_size;
 
-        if (partition.attributes & ~LP_PARTITION_ATTRIBUTE_MASK) {
+        if (partition.attributes & ~valid_attributes) {
             LERROR << "Logical partition has invalid attribute set.";
             return nullptr;
         }
diff --git a/fs_mgr/liblp/utility.cpp b/fs_mgr/liblp/utility.cpp
index 338b525..48c5c83 100644
--- a/fs_mgr/liblp/utility.cpp
+++ b/fs_mgr/liblp/utility.cpp
@@ -24,6 +24,10 @@
 #include <sys/ioctl.h>
 #endif
 
+#include <map>
+#include <string>
+#include <vector>
+
 #include <android-base/file.h>
 #include <ext4_utils/ext4_utils.h>
 #include <openssl/sha.h>
@@ -182,6 +186,14 @@
     return true;
 }
 
+bool UpdatePartitionName(LpMetadataPartition* partition, const std::string& name) {
+    if (name.size() > sizeof(partition->name)) {
+        return false;
+    }
+    strncpy(partition->name, name.c_str(), sizeof(partition->name));
+    return true;
+}
+
 bool SetBlockReadonly(int fd, bool readonly) {
 #if defined(__linux__)
     int val = readonly;
@@ -193,9 +205,9 @@
 #endif
 }
 
-base::unique_fd GetControlFileOrOpen(const char* path, int flags) {
+base::unique_fd GetControlFileOrOpen(std::string_view path, int flags) {
 #if defined(__ANDROID__)
-    int fd = android_get_control_file(path);
+    int fd = android_get_control_file(path.data());
     if (fd >= 0) {
         int newfd = TEMP_FAILURE_RETRY(dup(fd));
         if (newfd >= 0) {
@@ -204,7 +216,73 @@
         PERROR << "Cannot dup fd for already controlled file: " << path << ", reopening...";
     }
 #endif
-    return base::unique_fd(open(path, flags));
+    return base::unique_fd(open(path.data(), flags));
+}
+
+bool UpdateMetadataForInPlaceSnapshot(LpMetadata* metadata, uint32_t source_slot_number,
+                                      uint32_t target_slot_number) {
+    std::string source_slot_suffix = SlotSuffixForSlotNumber(source_slot_number);
+    std::string target_slot_suffix = SlotSuffixForSlotNumber(target_slot_number);
+
+    // There can be leftover groups with target suffix on retrofit devices.
+    // They are useless now, so delete.
+    std::vector<LpMetadataPartitionGroup*> new_group_ptrs;
+    for (auto& group : metadata->groups) {
+        std::string group_name = GetPartitionGroupName(group);
+        std::string slot_suffix = GetPartitionSlotSuffix(group_name);
+        // Don't add groups with target slot suffix.
+        if (slot_suffix == target_slot_suffix) continue;
+        // Replace source slot suffix with target slot suffix.
+        if (slot_suffix == source_slot_suffix) {
+            std::string new_name = group_name.substr(0, group_name.size() - slot_suffix.size()) +
+                                   target_slot_suffix;
+            if (!UpdatePartitionGroupName(&group, new_name)) {
+                LERROR << "Group name too long: " << new_name;
+                return false;
+            }
+        }
+        new_group_ptrs.push_back(&group);
+    }
+
+    std::vector<LpMetadataPartition*> new_partition_ptrs;
+    for (auto& partition : metadata->partitions) {
+        std::string partition_name = GetPartitionName(partition);
+        std::string slot_suffix = GetPartitionSlotSuffix(partition_name);
+        // Don't add partitions with target slot suffix.
+        if (slot_suffix == target_slot_suffix) continue;
+        // Replace source slot suffix with target slot suffix.
+        if (slot_suffix == source_slot_suffix) {
+            std::string new_name =
+                    partition_name.substr(0, partition_name.size() - slot_suffix.size()) +
+                    target_slot_suffix;
+            if (!UpdatePartitionName(&partition, new_name)) {
+                LERROR << "Partition name too long: " << new_name;
+                return false;
+            }
+        }
+        // Update group index.
+        auto it = std::find(new_group_ptrs.begin(), new_group_ptrs.end(),
+                            &metadata->groups[partition.group_index]);
+        if (it == new_group_ptrs.end()) {
+            LWARN << "Removing partition " << partition_name << " from group "
+                  << GetPartitionGroupName(metadata->groups[partition.group_index])
+                  << "; this partition should not belong to this group!";
+            continue;  // not adding to new_partition_ptrs
+        }
+        partition.attributes |= LP_PARTITION_ATTR_UPDATED;
+        partition.group_index = std::distance(new_group_ptrs.begin(), it);
+        new_partition_ptrs.push_back(&partition);
+    }
+
+    std::vector<LpMetadataPartition> new_partitions;
+    for (auto* p : new_partition_ptrs) new_partitions.emplace_back(std::move(*p));
+    metadata->partitions = std::move(new_partitions);
+
+    std::vector<LpMetadataPartitionGroup> new_groups;
+    for (auto* g : new_group_ptrs) new_groups.emplace_back(std::move(*g));
+    metadata->groups = std::move(new_groups);
+
+    return true;
 }
 
 }  // namespace fs_mgr
diff --git a/fs_mgr/liblp/utility.h b/fs_mgr/liblp/utility.h
index 96f1717..0661769 100644
--- a/fs_mgr/liblp/utility.h
+++ b/fs_mgr/liblp/utility.h
@@ -21,6 +21,9 @@
 #include <stdint.h>
 #include <sys/types.h>
 
+#include <string>
+#include <string_view>
+
 #include <android-base/logging.h>
 #include <android-base/unique_fd.h>
 
@@ -89,11 +92,16 @@
 // Update names from C++ strings.
 bool UpdateBlockDevicePartitionName(LpMetadataBlockDevice* device, const std::string& name);
 bool UpdatePartitionGroupName(LpMetadataPartitionGroup* group, const std::string& name);
+bool UpdatePartitionName(LpMetadataPartition* partition, const std::string& name);
 
 // Call BLKROSET ioctl on fd so that fd is readonly / read-writable.
 bool SetBlockReadonly(int fd, bool readonly);
 
-::android::base::unique_fd GetControlFileOrOpen(const char* path, int flags);
+::android::base::unique_fd GetControlFileOrOpen(std::string_view path, int flags);
+
+// For Virtual A/B updates, modify |metadata| so that it can be written to |target_slot_number|.
+bool UpdateMetadataForInPlaceSnapshot(LpMetadata* metadata, uint32_t source_slot_number,
+                                      uint32_t target_slot_number);
 
 }  // namespace fs_mgr
 }  // namespace android
diff --git a/fs_mgr/liblp/utility_test.cpp b/fs_mgr/liblp/utility_test.cpp
index 15f7fff..cac3989 100644
--- a/fs_mgr/liblp/utility_test.cpp
+++ b/fs_mgr/liblp/utility_test.cpp
@@ -15,6 +15,7 @@
  */
 
 #include <gtest/gtest.h>
+#include <liblp/builder.h>
 #include <liblp/liblp.h>
 
 #include "utility.h"
@@ -75,3 +76,81 @@
     EXPECT_EQ(GetPartitionSlotSuffix("system_a"), "_a");
     EXPECT_EQ(GetPartitionSlotSuffix("system_b"), "_b");
 }
+
+namespace android {
+namespace fs_mgr {
+// Equality comparison for testing. In reality, equality of device_index doesn't
+// necessary mean equality of the block device.
+bool operator==(const LinearExtent& l, const LinearExtent& r) {
+    return l.device_index() == r.device_index() && l.physical_sector() == r.physical_sector() &&
+           l.end_sector() == r.end_sector();
+}
+}  // namespace fs_mgr
+}  // namespace android
+
+static std::vector<LinearExtent> GetPartitionExtents(Partition* p) {
+    std::vector<LinearExtent> extents;
+    for (auto&& extent : p->extents()) {
+        auto linear_extent = extent->AsLinearExtent();
+        if (!linear_extent) return {};
+        extents.push_back(*linear_extent);
+    }
+    return extents;
+}
+
+TEST(liblp, UpdateMetadataForInPlaceSnapshot) {
+    using std::unique_ptr;
+
+    unique_ptr<MetadataBuilder> builder = MetadataBuilder::New(1024 * 1024, 1024, 2);
+    ASSERT_NE(builder, nullptr);
+
+    ASSERT_TRUE(builder->AddGroup("group_a", 256 * 1024));
+    Partition* system_a = builder->AddPartition("system_a", "group_a", LP_PARTITION_ATTR_READONLY);
+    ASSERT_NE(system_a, nullptr);
+    ASSERT_TRUE(builder->ResizePartition(system_a, 40 * 1024));
+    Partition* vendor_a = builder->AddPartition("vendor_a", "group_a", LP_PARTITION_ATTR_READONLY);
+    ASSERT_NE(vendor_a, nullptr);
+    ASSERT_TRUE(builder->ResizePartition(vendor_a, 20 * 1024));
+
+    ASSERT_TRUE(builder->AddGroup("group_b", 258 * 1024));
+    Partition* system_b = builder->AddPartition("system_b", "group_b", LP_PARTITION_ATTR_READONLY);
+    ASSERT_NE(system_b, nullptr);
+    ASSERT_TRUE(builder->ResizePartition(system_b, 36 * 1024));
+    Partition* vendor_b = builder->AddPartition("vendor_b", "group_b", LP_PARTITION_ATTR_READONLY);
+    ASSERT_NE(vendor_b, nullptr);
+    ASSERT_TRUE(builder->ResizePartition(vendor_b, 32 * 1024));
+
+    auto system_a_extents = GetPartitionExtents(system_a);
+    ASSERT_FALSE(system_a_extents.empty());
+
+    auto vendor_a_extents = GetPartitionExtents(vendor_a);
+    ASSERT_FALSE(vendor_a_extents.empty());
+
+    auto metadata = builder->Export();
+    ASSERT_NE(nullptr, metadata);
+
+    ASSERT_TRUE(UpdateMetadataForInPlaceSnapshot(metadata.get(), 0, 1));
+
+    auto new_builder = MetadataBuilder::New(*metadata);
+    ASSERT_NE(nullptr, new_builder);
+
+    EXPECT_EQ(nullptr, new_builder->FindGroup("group_a"));
+    EXPECT_EQ(nullptr, new_builder->FindPartition("system_a"));
+    EXPECT_EQ(nullptr, new_builder->FindPartition("vendor_a"));
+
+    auto group_b = new_builder->FindGroup("group_b");
+    ASSERT_NE(nullptr, group_b);
+    ASSERT_EQ(256 * 1024, group_b->maximum_size());
+
+    auto new_system_b = new_builder->FindPartition("system_b");
+    ASSERT_NE(nullptr, new_system_b);
+    EXPECT_EQ(40 * 1024, new_system_b->size());
+    auto new_system_b_extents = GetPartitionExtents(new_system_b);
+    EXPECT_EQ(system_a_extents, new_system_b_extents);
+
+    auto new_vendor_b = new_builder->FindPartition("vendor_b");
+    ASSERT_NE(nullptr, new_vendor_b);
+    EXPECT_EQ(20 * 1024, new_vendor_b->size());
+    auto new_vendor_b_extents = GetPartitionExtents(new_vendor_b);
+    EXPECT_EQ(vendor_a_extents, new_vendor_b_extents);
+}
diff --git a/fs_mgr/liblp/writer.cpp b/fs_mgr/liblp/writer.cpp
index 8a983ad..bb24069 100644
--- a/fs_mgr/liblp/writer.cpp
+++ b/fs_mgr/liblp/writer.cpp
@@ -83,8 +83,9 @@
 
 // Perform sanity checks so we don't accidentally overwrite valid metadata
 // with potentially invalid metadata, or random partition data with metadata.
-static bool ValidateAndSerializeMetadata(const IPartitionOpener& opener, const LpMetadata& metadata,
-                                         const std::string& slot_suffix, std::string* blob) {
+static bool ValidateAndSerializeMetadata([[maybe_unused]] const IPartitionOpener& opener,
+                                         const LpMetadata& metadata, const std::string& slot_suffix,
+                                         std::string* blob) {
     const LpMetadataGeometry& geometry = metadata.geometry;
 
     *blob = SerializeMetadata(metadata);
@@ -128,6 +129,10 @@
                    << block_device.first_logical_sector << " for size " << block_device.size;
             return false;
         }
+
+        // When flashing on the device, check partition sizes. Don't do this on
+        // the host since there is no way to verify.
+#if defined(__ANDROID__)
         BlockDeviceInfo info;
         if (!opener.GetInfo(partition_name, &info)) {
             PERROR << partition_name << ": ioctl";
@@ -138,6 +143,7 @@
                    << block_device.size << ", got " << info.size << ")";
             return false;
         }
+#endif
     }
 
     // Make sure all partition entries reference valid extents.
diff --git a/fs_mgr/libsnapshot/Android.bp b/fs_mgr/libsnapshot/Android.bp
index 52aad12..30d01a6 100644
--- a/fs_mgr/libsnapshot/Android.bp
+++ b/fs_mgr/libsnapshot/Android.bp
@@ -25,39 +25,128 @@
     shared_libs: [
         "libbase",
         "liblog",
+        "liblp",
     ],
     static_libs: [
+        "libcutils",
         "libdm",
+        "libfs_mgr",
+        "libfstab",
+        "liblp",
+        "update_metadata-protos",
     ],
     whole_static_libs: [
         "libext2_uuid",
         "libext4_utils",
-        "libfiemap",
+        "libfstab",
+    ],
+    header_libs: [
+        "libfiemap_headers",
+    ],
+    export_static_lib_headers: [
+        "update_metadata-protos",
+    ],
+    export_header_lib_headers: [
+        "libfiemap_headers",
     ],
     export_include_dirs: ["include"],
+    proto: {
+        type: "lite",
+        export_proto_headers: true,
+        canonical_path_from_root: false,
+    },
+}
+
+cc_defaults {
+    name: "libsnapshot_hal_deps",
+    cflags: [
+        "-DLIBSNAPSHOT_USE_HAL",
+    ],
+    shared_libs: [
+        "android.hardware.boot@1.0",
+        "android.hardware.boot@1.1",
+    ],
 }
 
 filegroup {
     name: "libsnapshot_sources",
     srcs: [
+        "android/snapshot/snapshot.proto",
+        "device_info.cpp",
         "snapshot.cpp",
+        "snapshot_metadata_updater.cpp",
+        "partition_cow_creator.cpp",
+        "utility.cpp",
     ],
 }
 
+cc_library_headers {
+    name: "libsnapshot_headers",
+    recovery_available: true,
+    defaults: ["libsnapshot_defaults"],
+}
+
 cc_library_static {
     name: "libsnapshot",
-    defaults: ["libsnapshot_defaults"],
+    defaults: [
+        "libsnapshot_defaults",
+        "libsnapshot_hal_deps",
+    ],
     srcs: [":libsnapshot_sources"],
-    static_libs: [
+    whole_static_libs: [
         "libfiemap_binder",
     ],
 }
 
 cc_library_static {
-    name: "libsnapshot_nobinder",
+    name: "libsnapshot_init",
     defaults: ["libsnapshot_defaults"],
     srcs: [":libsnapshot_sources"],
     recovery_available: true,
+    whole_static_libs: [
+        "libfiemap_passthrough",
+    ],
+}
+
+cc_library_static {
+    name: "libsnapshot_nobinder",
+    defaults: [
+        "libsnapshot_defaults",
+        "libsnapshot_hal_deps",
+    ],
+    srcs: [":libsnapshot_sources"],
+    recovery_available: true,
+    whole_static_libs: [
+        "libfiemap_passthrough",
+    ],
+}
+
+cc_library_static {
+    name: "libsnapshot_test_helpers",
+    defaults: ["libsnapshot_defaults"],
+    export_include_dirs: [
+        "include_test",
+    ],
+    srcs: [
+        "test_helpers.cpp",
+    ],
+    shared_libs: [
+        "android.hardware.boot@1.1",
+        "libcrypto",
+    ],
+    export_shared_lib_headers: [
+        "android.hardware.boot@1.1",
+    ],
+    header_libs: [
+        "libstorage_literals_headers",
+    ],
+    export_header_lib_headers: [
+        "libstorage_literals_headers",
+    ],
+    static_libs: [
+        "libgtest",
+        "libgmock",
+    ],
 }
 
 cc_test {
@@ -65,16 +154,60 @@
     defaults: ["libsnapshot_defaults"],
     srcs: [
         "snapshot_test.cpp",
+        "partition_cow_creator_test.cpp",
+        "snapshot_metadata_updater_test.cpp",
+        "test_helpers.cpp",
     ],
     shared_libs: [
         "libbinder",
+        "libcrypto",
+        "libhidlbase",
+        "libprotobuf-cpp-lite",
         "libutils",
     ],
     static_libs: [
-        "libcutils",
-        "libcrypto",
+        "android.hardware.boot@1.0",
+        "android.hardware.boot@1.1",
         "libfs_mgr",
+        "libgmock",
         "liblp",
         "libsnapshot",
+        "libsnapshot_test_helpers",
+        "libsparse",
+        "libz",
+    ],
+    header_libs: [
+        "libstorage_literals_headers",
+    ],
+}
+
+cc_binary {
+    name: "snapshotctl",
+    srcs: [
+        "snapshotctl.cpp",
+    ],
+    static_libs: [
+        "libdm",
+        "libext2_uuid",
+        "libfiemap_binder",
+        "libfstab",
+        "libsnapshot",
+    ],
+    shared_libs: [
+        "android.hardware.boot@1.0",
+        "android.hardware.boot@1.1",
+        "libbase",
+        "libbinder",
+        "libbinderthreadstate",
+        "libext4_utils",
+        "libfs_mgr",
+        "libhidlbase",
+        "liblog",
+        "liblp",
+        "libprotobuf-cpp-lite",
+        "libutils",
+    ],
+    init_rc: [
+        "snapshotctl.rc",
     ],
 }
diff --git a/fs_mgr/libsnapshot/android/snapshot/snapshot.proto b/fs_mgr/libsnapshot/android/snapshot/snapshot.proto
new file mode 100644
index 0000000..629c3a4
--- /dev/null
+++ b/fs_mgr/libsnapshot/android/snapshot/snapshot.proto
@@ -0,0 +1,87 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+package android.snapshot;
+
+option optimize_for = LITE_RUNTIME;
+
+// Next: 4
+enum SnapshotState {
+    // No snapshot is found.
+    NONE = 0;
+
+    // The snapshot has been created and possibly written to. Rollbacks are
+    // possible by destroying the snapshot.
+    CREATED = 1;
+
+    // Changes are being merged. No rollbacks are possible beyond this point.
+    MERGING = 2;
+
+    // Changes have been merged, Future reboots may map the base device
+    // directly.
+    MERGE_COMPLETED = 3;
+}
+
+// Next: 9
+message SnapshotStatus {
+    // Name of the snapshot. This is usually the name of the snapshotted
+    // logical partition; for example, "system_b".
+    string name = 1;
+
+    SnapshotState state = 2;
+
+    // Size of the full (base) device.
+    uint64 device_size = 3;
+
+    // Size of the snapshot. This is the sum of lengths of ranges in the base
+    // device that needs to be snapshotted during the update.
+    // This must be less than or equal to |device_size|.
+    // This value is 0 if no snapshot is needed for this device because
+    // no changes
+    uint64 snapshot_size = 4;
+
+    // Size of the "COW partition". A COW partition is a special logical
+    // partition represented in the super partition metadata. This partition and
+    // the "COW image" form the "COW device" that supports the snapshot device.
+    //
+    // When SnapshotManager creates a COW device, it first searches for unused
+    // blocks in the super partition, and use those before creating the COW
+    // image if the COW partition is not big enough.
+    //
+    // This value is 0 if no space in super is left for the COW partition.
+    // |cow_partition_size + cow_file_size| must not be zero if |snapshot_size|
+    // is non-zero.
+    uint64 cow_partition_size = 5;
+
+    // Size of the "COW file", or "COW image". A COW file / image is created
+    // when the "COW partition" is not big enough to store changes to the
+    // snapshot device.
+    //
+    // This value is 0 if |cow_partition_size| is big enough to hold all changes
+    // to the snapshot device.
+    uint64 cow_file_size = 6;
+
+    // Sectors allocated for the COW device. Recording this value right after
+    // the update and before the merge allows us to infer the progress of the
+    // merge process.
+    // This is non-zero when |state| == MERGING or MERGE_COMPLETED.
+    uint64 sectors_allocated = 7;
+
+    // Metadata sectors allocated for the COW device. Recording this value right
+    // before the update and before the merge allows us to infer the progress of
+    // the merge process.
+    // This is non-zero when |state| == MERGING or MERGE_COMPLETED.
+    uint64 metadata_sectors = 8;
+}
diff --git a/fs_mgr/libsnapshot/device_info.cpp b/fs_mgr/libsnapshot/device_info.cpp
new file mode 100644
index 0000000..bacb41c
--- /dev/null
+++ b/fs_mgr/libsnapshot/device_info.cpp
@@ -0,0 +1,123 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "device_info.h"
+
+#include <android-base/logging.h>
+#include <fs_mgr.h>
+#include <fs_mgr_overlayfs.h>
+
+namespace android {
+namespace snapshot {
+
+#ifdef LIBSNAPSHOT_USE_HAL
+using android::hardware::boot::V1_0::CommandResult;
+#endif
+
+using namespace std::string_literals;
+
+#ifdef __ANDROID_RECOVERY__
+constexpr bool kIsRecovery = true;
+#else
+constexpr bool kIsRecovery = false;
+#endif
+
+std::string DeviceInfo::GetGsidDir() const {
+    return "ota"s;
+}
+
+std::string DeviceInfo::GetMetadataDir() const {
+    return "/metadata/ota"s;
+}
+
+std::string DeviceInfo::GetSlotSuffix() const {
+    return fs_mgr_get_slot_suffix();
+}
+
+std::string DeviceInfo::GetOtherSlotSuffix() const {
+    return fs_mgr_get_other_slot_suffix();
+}
+
+const android::fs_mgr::IPartitionOpener& DeviceInfo::GetPartitionOpener() const {
+    return opener_;
+}
+
+std::string DeviceInfo::GetSuperDevice(uint32_t slot) const {
+    return fs_mgr_get_super_partition_name(slot);
+}
+
+bool DeviceInfo::IsOverlayfsSetup() const {
+    return fs_mgr_overlayfs_is_setup();
+}
+
+#ifdef LIBSNAPSHOT_USE_HAL
+bool DeviceInfo::EnsureBootHal() {
+    if (!boot_control_) {
+        auto hal = android::hardware::boot::V1_0::IBootControl::getService();
+        if (!hal) {
+            LOG(ERROR) << "Could not find IBootControl HAL";
+            return false;
+        }
+        boot_control_ = android::hardware::boot::V1_1::IBootControl::castFrom(hal);
+        if (!boot_control_) {
+            LOG(ERROR) << "Could not find IBootControl 1.1 HAL";
+            return false;
+        }
+    }
+    return true;
+}
+#endif
+
+bool DeviceInfo::SetBootControlMergeStatus([[maybe_unused]] MergeStatus status) {
+#ifdef LIBSNAPSHOT_USE_HAL
+    if (!EnsureBootHal()) {
+        return false;
+    }
+    if (!boot_control_->setSnapshotMergeStatus(status)) {
+        LOG(ERROR) << "Unable to set the snapshot merge status";
+        return false;
+    }
+    return true;
+#else
+    LOG(ERROR) << "HAL support not enabled.";
+    return false;
+#endif
+}
+
+bool DeviceInfo::IsRecovery() const {
+    return kIsRecovery;
+}
+
+bool DeviceInfo::SetSlotAsUnbootable([[maybe_unused]] unsigned int slot) {
+#ifdef LIBSNAPSHOT_USE_HAL
+    if (!EnsureBootHal()) {
+        return false;
+    }
+
+    CommandResult result = {};
+    auto cb = [&](CommandResult r) -> void { result = r; };
+    boot_control_->setSlotAsUnbootable(slot, cb);
+    if (!result.success) {
+        LOG(ERROR) << "Error setting slot " << slot << " unbootable: " << result.errMsg;
+        return false;
+    }
+    return true;
+#else
+    LOG(ERROR) << "HAL support not enabled.";
+    return false;
+#endif
+}
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/device_info.h b/fs_mgr/libsnapshot/device_info.h
new file mode 100644
index 0000000..d8d3d91
--- /dev/null
+++ b/fs_mgr/libsnapshot/device_info.h
@@ -0,0 +1,53 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <string>
+
+#ifdef LIBSNAPSHOT_USE_HAL
+#include <android/hardware/boot/1.1/IBootControl.h>
+#endif
+#include <liblp/partition_opener.h>
+#include <libsnapshot/snapshot.h>
+
+namespace android {
+namespace snapshot {
+
+class DeviceInfo final : public SnapshotManager::IDeviceInfo {
+    using MergeStatus = android::hardware::boot::V1_1::MergeStatus;
+
+  public:
+    std::string GetGsidDir() const override;
+    std::string GetMetadataDir() const override;
+    std::string GetSlotSuffix() const override;
+    std::string GetOtherSlotSuffix() const override;
+    const android::fs_mgr::IPartitionOpener& GetPartitionOpener() const override;
+    std::string GetSuperDevice(uint32_t slot) const override;
+    bool IsOverlayfsSetup() const override;
+    bool SetBootControlMergeStatus(MergeStatus status) override;
+    bool SetSlotAsUnbootable(unsigned int slot) override;
+    bool IsRecovery() const override;
+
+  private:
+    bool EnsureBootHal();
+
+    android::fs_mgr::PartitionOpener opener_;
+#ifdef LIBSNAPSHOT_USE_HAL
+    android::sp<android::hardware::boot::V1_1::IBootControl> boot_control_;
+#endif
+};
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/dm_snapshot_internals.h b/fs_mgr/libsnapshot/dm_snapshot_internals.h
new file mode 100644
index 0000000..fef256d
--- /dev/null
+++ b/fs_mgr/libsnapshot/dm_snapshot_internals.h
@@ -0,0 +1,135 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <stdint.h>
+
+#include <vector>
+
+namespace android {
+namespace snapshot {
+
+class DmSnapCowSizeCalculator {
+  public:
+    DmSnapCowSizeCalculator(unsigned int sector_bytes, unsigned int chunk_sectors)
+        : sector_bytes_(sector_bytes),
+          chunk_sectors_(chunk_sectors),
+          exceptions_per_chunk(chunk_sectors_ * sector_bytes_ / (64 * 2 / 8)) {}
+
+    void WriteByte(uint64_t address) { WriteSector(address / sector_bytes_); }
+    void WriteSector(uint64_t sector) { WriteChunk(sector / chunk_sectors_); }
+    void WriteChunk(uint64_t chunk_id) {
+        if (modified_chunks_.size() <= chunk_id) {
+            modified_chunks_.resize(chunk_id + 1, false);
+        }
+        modified_chunks_[chunk_id] = true;
+    }
+
+    uint64_t cow_size_bytes() const { return cow_size_sectors() * sector_bytes_; }
+    uint64_t cow_size_sectors() const { return cow_size_chunks() * chunk_sectors_; }
+
+    /*
+     * The COW device has a precise internal structure as follows:
+     *
+     * - header (1 chunk)
+     * - #0 map and chunks
+     *   - map (1 chunk)
+     *   - chunks addressable by previous map (exceptions_per_chunk)
+     * - #1 map and chunks
+     *   - map (1 chunk)
+     *   - chunks addressable by previous map (exceptions_per_chunk)
+     * ...
+     * - #n: map and chunks
+     *   - map (1 chunk)
+     *   - chunks addressable by previous map (exceptions_per_chunk)
+     * - 1 extra chunk
+     */
+    uint64_t cow_size_chunks() const {
+        uint64_t modified_chunks_count = 0;
+        uint64_t cow_chunks = 0;
+
+        for (const auto& c : modified_chunks_) {
+            if (c) {
+                ++modified_chunks_count;
+            }
+        }
+
+        /* disk header + padding = 1 chunk */
+        cow_chunks += 1;
+
+        /* snapshot modified chunks */
+        cow_chunks += modified_chunks_count;
+
+        /* snapshot chunks index metadata */
+        cow_chunks += 1 + modified_chunks_count / exceptions_per_chunk;
+
+        return cow_chunks;
+    }
+
+  private:
+    /*
+     * Size of each sector in bytes.
+     */
+    const uint64_t sector_bytes_;
+
+    /*
+     * Size of each chunk in sectors.
+     */
+    const uint64_t chunk_sectors_;
+
+    /*
+     * The COW device stores tables to map the modified chunks. Each table
+     * has the size of exactly 1 chunk.
+     * Each row of the table (also called exception in the kernel) contains two
+     * 64 bit indices to identify the corresponding chunk, and this 128 bit row
+     * size is a constant.
+     * The number of exceptions that each table can contain determines the
+     * number of data chunks that separate two consecutive tables. This value
+     * is then fundamental to compute the space overhead introduced by the
+     * tables in COW devices.
+     */
+    const uint64_t exceptions_per_chunk;
+
+    /*
+     * |modified_chunks_| is a container that keeps trace of the modified
+     * chunks.
+     * Multiple options were considered when choosing the most appropriate data
+     * structure for this container. Here follows a summary of why vector<bool>
+     * has been chosen, taking as a reference a snapshot partition of 4 GiB and
+     * chunk size of 4 KiB.
+     * - std::set<uint64_t> is very space-efficient for a small number of
+     *   operations, but if the whole snapshot is changed, it would need to
+     *   store
+     *     4 GiB / 4 KiB * (64 bit / 8) = 8 MiB
+     *   just for the data, plus the additional data overhead for the red-black
+     *   tree used for data sorting (if each rb-tree element stores 3 address
+     *   and the word-aligne color, the total size grows to 32 MiB).
+     * - std::bitset<N> is not a good fit because requires a priori knowledge,
+     *   at compile time, of the bitset size.
+     * - std::vector<bool> is a special case of vector, which uses a data
+     *   compression that allows reducing the space utilization of each element
+     *   to 1 bit. In detail, this data structure is composed of a resizable
+     *   array of words, each of them representing a bitmap. On a 64 bit
+     *   device, modifying the whole 4 GiB snapshot grows this container up to
+     *     4 * GiB / 4 KiB / 64 = 64 KiB
+     *   that, even if is the same space requirement to change a single byte at
+     *   the highest address of the snapshot, is a very affordable space
+     *   requirement.
+     */
+    std::vector<bool> modified_chunks_;
+};
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/include/libsnapshot/auto_device.h b/fs_mgr/libsnapshot/include/libsnapshot/auto_device.h
new file mode 100644
index 0000000..73450db
--- /dev/null
+++ b/fs_mgr/libsnapshot/include/libsnapshot/auto_device.h
@@ -0,0 +1,42 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <string>
+
+#include <android-base/macros.h>
+
+namespace android {
+namespace snapshot {
+
+// An abstract "device" that will be cleaned up (unmapped, unmounted, etc.) upon
+// destruction.
+struct AutoDevice {
+    virtual ~AutoDevice(){};
+    void Release();
+
+    bool HasDevice() const { return !name_.empty(); }
+
+  protected:
+    AutoDevice(const std::string& name) : name_(name) {}
+    std::string name_;
+
+  private:
+    DISALLOW_COPY_AND_ASSIGN(AutoDevice);
+    AutoDevice(AutoDevice&& other) = delete;
+};
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h b/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
index f7608dc..7450d19 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
@@ -17,13 +17,23 @@
 #include <stdint.h>
 
 #include <chrono>
+#include <map>
 #include <memory>
+#include <optional>
+#include <ostream>
 #include <string>
+#include <string_view>
 #include <vector>
 
 #include <android-base/unique_fd.h>
+#include <fs_mgr_dm_linear.h>
 #include <libdm/dm.h>
 #include <libfiemap/image_manager.h>
+#include <liblp/builder.h>
+#include <liblp/liblp.h>
+#include <update_engine/update_metadata.pb.h>
+
+#include <libsnapshot/auto_device.h>
 
 #ifndef FRIEND_TEST
 #define FRIEND_TEST(test_set_name, individual_test) \
@@ -37,8 +47,33 @@
 class IImageManager;
 }  // namespace fiemap
 
+namespace fs_mgr {
+struct CreateLogicalPartitionParams;
+class IPartitionOpener;
+}  // namespace fs_mgr
+
+// Forward declare IBootControl types since we cannot include only the headers
+// with Soong. Note: keep the enum width in sync.
+namespace hardware {
+namespace boot {
+namespace V1_1 {
+enum class MergeStatus : int32_t;
+}  // namespace V1_1
+}  // namespace boot
+}  // namespace hardware
+
 namespace snapshot {
 
+struct AutoDeleteCowImage;
+struct AutoDeleteSnapshot;
+struct AutoDeviceList;
+struct PartitionCowCreator;
+class SnapshotStatus;
+
+static constexpr const std::string_view kCowGroupName = "cow";
+
+bool SourceCopyOperationIsClone(const chromeos_update_engine::InstallOperation& operation);
+
 enum class UpdateState : unsigned int {
     // No update or merge is in progress.
     None,
@@ -60,10 +95,22 @@
     MergeCompleted,
 
     // Merging failed due to an unrecoverable error.
-    MergeFailed
+    MergeFailed,
+
+    // The update was implicitly cancelled, either by a rollback or a flash
+    // operation via fastboot. This state can only be returned by WaitForMerge.
+    Cancelled
 };
+std::ostream& operator<<(std::ostream& os, UpdateState state);
 
 class SnapshotManager final {
+    using CreateLogicalPartitionParams = android::fs_mgr::CreateLogicalPartitionParams;
+    using IPartitionOpener = android::fs_mgr::IPartitionOpener;
+    using LpMetadata = android::fs_mgr::LpMetadata;
+    using MetadataBuilder = android::fs_mgr::MetadataBuilder;
+    using DeltaArchiveManifest = chromeos_update_engine::DeltaArchiveManifest;
+    using MergeStatus = android::hardware::boot::V1_1::MergeStatus;
+
   public:
     // Dependency injection for testing.
     class IDeviceInfo {
@@ -71,11 +118,14 @@
         virtual ~IDeviceInfo() {}
         virtual std::string GetGsidDir() const = 0;
         virtual std::string GetMetadataDir() const = 0;
-
-        // Return true if the device is currently running off snapshot devices,
-        // indicating that we have booted after applying (but not merging) an
-        // OTA.
-        virtual bool IsRunningSnapshot() const = 0;
+        virtual std::string GetSlotSuffix() const = 0;
+        virtual std::string GetOtherSlotSuffix() const = 0;
+        virtual std::string GetSuperDevice(uint32_t slot) const = 0;
+        virtual const IPartitionOpener& GetPartitionOpener() const = 0;
+        virtual bool IsOverlayfsSetup() const = 0;
+        virtual bool SetBootControlMergeStatus(MergeStatus status) = 0;
+        virtual bool SetSlotAsUnbootable(unsigned int slot) = 0;
+        virtual bool IsRecovery() const = 0;
     };
 
     ~SnapshotManager();
@@ -85,24 +135,42 @@
     // instance will be created.
     static std::unique_ptr<SnapshotManager> New(IDeviceInfo* device = nullptr);
 
+    // This is similar to New(), except designed specifically for first-stage
+    // init or recovery.
+    static std::unique_ptr<SnapshotManager> NewForFirstStageMount(IDeviceInfo* device = nullptr);
+
+    // Helper function for first-stage init to check whether a SnapshotManager
+    // might be needed to perform first-stage mounts.
+    static bool IsSnapshotManagerNeeded();
+
     // Begin an update. This must be called before creating any snapshots. It
     // will fail if GetUpdateState() != None.
     bool BeginUpdate();
 
-    // Cancel an update; any snapshots will be deleted. This will fail if the
-    // state != Initiated or None.
+    // Cancel an update; any snapshots will be deleted. This is allowed if the
+    // state == Initiated, None, or Unverified (before rebooting to the new
+    // slot).
     bool CancelUpdate();
 
+    // Mark snapshot writes as having completed. After this, new snapshots cannot
+    // be created, and the device must either cancel the OTA (either before
+    // rebooting or after rolling back), or merge the OTA.
+    bool FinishedSnapshotWrites();
+
+  private:
     // Initiate a merge on all snapshot devices. This should only be used after an
     // update has been marked successful after booting.
     bool InitiateMerge();
 
-    // Wait for the current merge to finish, then perform cleanup when it
-    // completes. It is necessary to call this after InitiateMerge(), or when
-    // a merge state is detected during boot.
+    // Perform any necessary post-boot actions. This should be run soon after
+    // /data is mounted.
     //
-    // Note that after calling WaitForMerge(), GetUpdateState() may still return
-    // that a merge is in progress:
+    // If a merge is in progress, this function will block until the merge is
+    // completed. If a merge or update was cancelled, this will clean up any
+    // update artifacts and return.
+    //
+    // Note that after calling this, GetUpdateState() may still return that a
+    // merge is in progress:
     //   MergeFailed indicates that a fatal error occurred. WaitForMerge() may
     //   called any number of times again to attempt to make more progress, but
     //   we do not expect it to succeed if a catastrophic error occurred.
@@ -115,7 +183,19 @@
     //
     //   MergeCompleted indicates that the update has fully completed.
     //   GetUpdateState will return None, and a new update can begin.
-    UpdateState WaitForMerge();
+    //
+    // The optional callback allows the caller to periodically check the
+    // progress with GetUpdateState().
+    UpdateState ProcessUpdateState(const std::function<void()>& callback = {});
+
+  public:
+    // Initiate the merge if necessary, then wait for the merge to finish.
+    // See InitiateMerge() and ProcessUpdateState() for details.
+    // Returns:
+    //   - None if no merge to initiate
+    //   - MergeCompleted if merge is completed
+    //   - other states indicating an error has occurred
+    UpdateState InitiateMergeAndWait();
 
     // Find the status of the current update, if any.
     //
@@ -125,14 +205,82 @@
     //   Other: 0
     UpdateState GetUpdateState(double* progress = nullptr);
 
+    // Create necessary COW device / files for OTA clients. New logical partitions will be added to
+    // group "cow" in target_metadata. Regions of partitions of current_metadata will be
+    // "write-protected" and snapshotted.
+    bool CreateUpdateSnapshots(const DeltaArchiveManifest& manifest);
+
+    // Map a snapshotted partition for OTA clients to write to. Write-protected regions are
+    // determined previously in CreateSnapshots.
+    bool MapUpdateSnapshot(const CreateLogicalPartitionParams& params, std::string* snapshot_path);
+
+    // Unmap a snapshot device that's previously mapped with MapUpdateSnapshot.
+    bool UnmapUpdateSnapshot(const std::string& target_partition_name);
+
+    // If this returns true, first-stage mount must call
+    // CreateLogicalAndSnapshotPartitions rather than CreateLogicalPartitions.
+    bool NeedSnapshotsInFirstStageMount();
+
+    // Perform first-stage mapping of snapshot targets. This replaces init's
+    // call to CreateLogicalPartitions when snapshots are present.
+    bool CreateLogicalAndSnapshotPartitions(const std::string& super_device);
+
+    // This method should be called preceding any wipe or flash of metadata or
+    // userdata. It is only valid in recovery or fastbootd, and it ensures that
+    // a merge has been completed.
+    //
+    // When userdata will be wiped or flashed, it is necessary to clean up any
+    // snapshot state. If a merge is in progress, the merge must be finished.
+    // If a snapshot is present but not yet merged, the slot must be marked as
+    // unbootable.
+    //
+    // Returns true on success (or nothing to do), false on failure. The
+    // optional callback fires periodically to query progress via GetUpdateState.
+    bool HandleImminentDataWipe(const std::function<void()>& callback = {});
+
+    // Dump debug information.
+    bool Dump(std::ostream& os);
+
+    // Ensure metadata directory is mounted in recovery. When the returned
+    // AutoDevice is destroyed, the metadata directory is automatically
+    // unmounted.
+    // Return nullptr if any failure.
+    // In Android mode, Return an AutoDevice that does nothing
+    // In recovery, return an AutoDevice that does nothing if metadata entry
+    // is not found in fstab.
+    // Note: if this function is called the second time before the AutoDevice returned from the
+    // first call is destroyed, the device will be unmounted when any of these AutoDevices is
+    // destroyed. For example:
+    //   auto a = mgr->EnsureMetadataMounted(); // mounts
+    //   auto b = mgr->EnsureMetadataMounted(); // does nothing
+    //   b.reset() // unmounts
+    //   a.reset() // does nothing
+    std::unique_ptr<AutoDevice> EnsureMetadataMounted();
+
   private:
+    FRIEND_TEST(SnapshotTest, CleanFirstStageMount);
     FRIEND_TEST(SnapshotTest, CreateSnapshot);
-    FRIEND_TEST(SnapshotTest, MapSnapshot);
+    FRIEND_TEST(SnapshotTest, FirstStageMountAfterRollback);
+    FRIEND_TEST(SnapshotTest, FirstStageMountAndMerge);
+    FRIEND_TEST(SnapshotTest, FlashSuperDuringMerge);
+    FRIEND_TEST(SnapshotTest, FlashSuperDuringUpdate);
     FRIEND_TEST(SnapshotTest, MapPartialSnapshot);
-    FRIEND_TEST(SnapshotTest, NoMergeBeforeReboot);
+    FRIEND_TEST(SnapshotTest, MapSnapshot);
     FRIEND_TEST(SnapshotTest, Merge);
-    FRIEND_TEST(SnapshotTest, MergeCannotRemoveCow);
+    FRIEND_TEST(SnapshotTest, NoMergeBeforeReboot);
+    FRIEND_TEST(SnapshotTest, UpdateBootControlHal);
+    FRIEND_TEST(SnapshotUpdateTest, DataWipeAfterRollback);
+    FRIEND_TEST(SnapshotUpdateTest, DataWipeRollbackInRecovery);
+    FRIEND_TEST(SnapshotUpdateTest, MergeCannotRemoveCow);
+    FRIEND_TEST(SnapshotUpdateTest, MergeInRecovery);
+    FRIEND_TEST(SnapshotUpdateTest, SnapshotStatusFileWithoutCow);
     friend class SnapshotTest;
+    friend class SnapshotUpdateTest;
+    friend class FlashAfterUpdateTest;
+    friend class LockTestConsumer;
+    friend struct AutoDeleteCowImage;
+    friend struct AutoDeleteSnapshot;
+    friend struct PartitionCowCreator;
 
     using DmTargetSnapshot = android::dm::DmTargetSnapshot;
     using IImageManager = android::fiemap::IImageManager;
@@ -140,9 +288,12 @@
 
     explicit SnapshotManager(IDeviceInfo* info);
 
-    // This is created lazily since it connects via binder.
+    // This is created lazily since it can connect via binder.
     bool EnsureImageManager();
 
+    // Helper for first-stage init.
+    bool ForceLocalImageManager();
+
     // Helper function for tests.
     IImageManager* image_manager() const { return images_.get(); }
 
@@ -154,9 +305,6 @@
         LockedFile(const std::string& path, android::base::unique_fd&& fd, int lock_mode)
             : path_(path), fd_(std::move(fd)), lock_mode_(lock_mode) {}
         ~LockedFile();
-
-        const std::string& path() const { return path_; }
-        int fd() const { return fd_; }
         int lock_mode() const { return lock_mode_; }
 
       private:
@@ -164,28 +312,29 @@
         android::base::unique_fd fd_;
         int lock_mode_;
     };
-    std::unique_ptr<LockedFile> OpenFile(const std::string& file, int open_flags, int lock_flags);
-    bool Truncate(LockedFile* file);
+    static std::unique_ptr<LockedFile> OpenFile(const std::string& file, int lock_flags);
 
     // Create a new snapshot record. This creates the backing COW store and
     // persists information needed to map the device. The device can be mapped
     // with MapSnapshot().
     //
-    // |device_size| should be the size of the base_device that will be passed
-    // via MapDevice(). |snapshot_size| should be the number of bytes in the
-    // base device, starting from 0, that will be snapshotted. The cow_size
+    // |status|.device_size should be the size of the base_device that will be passed
+    // via MapDevice(). |status|.snapshot_size should be the number of bytes in the
+    // base device, starting from 0, that will be snapshotted. |status|.cow_file_size
     // should be the amount of space that will be allocated to store snapshot
     // deltas.
     //
-    // If |snapshot_size| < device_size, then the device will always
+    // If |status|.snapshot_size < |status|.device_size, then the device will always
     // be mapped with two table entries: a dm-snapshot range covering
     // snapshot_size, and a dm-linear range covering the remainder.
     //
-    // All sizes are specified in bytes, and the device and snapshot sizes
-    // must be a multiple of the sector size (512 bytes). |cow_size| will
-    // be rounded up to the nearest sector.
-    bool CreateSnapshot(LockedFile* lock, const std::string& name, uint64_t device_size,
-                        uint64_t snapshot_size, uint64_t cow_size);
+    // All sizes are specified in bytes, and the device, snapshot, COW partition and COW file sizes
+    // must be a multiple of the sector size (512 bytes).
+    bool CreateSnapshot(LockedFile* lock, SnapshotStatus* status);
+
+    // |name| should be the base partition name (e.g. "system_a"). Create the
+    // backing COW image using the size previously passed to CreateSnapshot().
+    bool CreateCowImage(LockedFile* lock, const std::string& name);
 
     // Map a snapshot device that was previously created with CreateSnapshot.
     // If a merge was previously initiated, the device-mapper table will have a
@@ -195,45 +344,70 @@
     // timeout_ms is 0, then no wait will occur and |dev_path| may not yet
     // exist on return.
     bool MapSnapshot(LockedFile* lock, const std::string& name, const std::string& base_device,
-                     const std::chrono::milliseconds& timeout_ms, std::string* dev_path);
+                     const std::string& cow_device, const std::chrono::milliseconds& timeout_ms,
+                     std::string* dev_path);
 
-    // Remove the backing copy-on-write image for the named snapshot. The
+    // Map a COW image that was previous created with CreateCowImage.
+    std::optional<std::string> MapCowImage(const std::string& name,
+                                           const std::chrono::milliseconds& timeout_ms);
+
+    // Remove the backing copy-on-write image and snapshot states for the named snapshot. The
     // caller is responsible for ensuring that the snapshot is unmapped.
     bool DeleteSnapshot(LockedFile* lock, const std::string& name);
 
     // Unmap a snapshot device previously mapped with MapSnapshotDevice().
     bool UnmapSnapshot(LockedFile* lock, const std::string& name);
 
+    // Unmap a COW image device previously mapped with MapCowImage().
+    bool UnmapCowImage(const std::string& name);
+
     // Unmap and remove all known snapshots.
     bool RemoveAllSnapshots(LockedFile* lock);
 
     // List the known snapshot names.
     bool ListSnapshots(LockedFile* lock, std::vector<std::string>* snapshots);
 
-    // Interact with /metadata/ota/state.
-    std::unique_ptr<LockedFile> OpenStateFile(int open_flags, int lock_flags);
+    // Check for a cancelled or rolled back merge, returning true if such a
+    // condition was detected and handled.
+    bool HandleCancelledUpdate(LockedFile* lock);
+
+    // Helper for HandleCancelledUpdate. Assumes booting from new slot.
+    bool HandleCancelledUpdateOnNewSlot(LockedFile* lock);
+
+    // Remove artifacts created by the update process, such as snapshots, and
+    // set the update state to None.
+    bool RemoveAllUpdateState(LockedFile* lock);
+
+    // Interact with /metadata/ota.
+    std::unique_ptr<LockedFile> OpenLock(int lock_flags);
     std::unique_ptr<LockedFile> LockShared();
     std::unique_ptr<LockedFile> LockExclusive();
+    std::string GetLockPath() const;
+
+    // Interact with /metadata/ota/state.
     UpdateState ReadUpdateState(LockedFile* file);
     bool WriteUpdateState(LockedFile* file, UpdateState state);
     std::string GetStateFilePath() const;
 
-    // This state is persisted per-snapshot in /metadata/ota/snapshots/.
-    struct SnapshotStatus {
-        std::string state;
-        uint64_t device_size;
-        uint64_t snapshot_size;
-        // These are non-zero when merging.
-        uint64_t sectors_allocated = 0;
-        uint64_t metadata_sectors = 0;
-    };
-
     // Helpers for merging.
     bool SwitchSnapshotToMerge(LockedFile* lock, const std::string& name);
     bool RewriteSnapshotDeviceTable(const std::string& dm_name);
     bool MarkSnapshotMergeCompleted(LockedFile* snapshot_lock, const std::string& snapshot_name);
     void AcknowledgeMergeSuccess(LockedFile* lock);
     void AcknowledgeMergeFailure();
+    std::unique_ptr<LpMetadata> ReadCurrentMetadata();
+
+    enum class MetadataPartitionState {
+        // Partition does not exist.
+        None,
+        // Partition is flashed.
+        Flashed,
+        // Partition is created by OTA client.
+        Updated,
+    };
+    // Helper function to check the state of a partition as described in metadata.
+    MetadataPartitionState GetMetadataPartitionState(const LpMetadata& metadata,
+                                                     const std::string& name);
 
     // Note that these require the name of the device containing the snapshot,
     // which may be the "inner" device. Use GetsnapshotDeviecName().
@@ -256,21 +430,71 @@
     UpdateState CheckTargetMergeState(LockedFile* lock, const std::string& name);
 
     // Interact with status files under /metadata/ota/snapshots.
-    bool WriteSnapshotStatus(LockedFile* lock, const std::string& name,
-                             const SnapshotStatus& status);
+    bool WriteSnapshotStatus(LockedFile* lock, const SnapshotStatus& status);
     bool ReadSnapshotStatus(LockedFile* lock, const std::string& name, SnapshotStatus* status);
     std::string GetSnapshotStatusFilePath(const std::string& name);
 
+    std::string GetSnapshotBootIndicatorPath();
+    void RemoveSnapshotBootIndicator();
+
     // Return the name of the device holding the "snapshot" or "snapshot-merge"
     // target. This may not be the final device presented via MapSnapshot(), if
     // for example there is a linear segment.
     std::string GetSnapshotDeviceName(const std::string& snapshot_name,
                                       const SnapshotStatus& status);
 
+    // Map the base device, COW devices, and snapshot device.
+    bool MapPartitionWithSnapshot(LockedFile* lock, CreateLogicalPartitionParams params,
+                                  std::string* path);
+
+    // Map the COW devices, including the partition in super and the images.
+    // |params|:
+    //    - |partition_name| should be the name of the top-level partition (e.g. system_b),
+    //            not system_b-cow-img
+    //    - |device_name| and |partition| is ignored
+    //    - |timeout_ms| and the rest is respected
+    // Return the path in |cow_device_path| (e.g. /dev/block/dm-1) and major:minor in
+    // |cow_device_string|
+    bool MapCowDevices(LockedFile* lock, const CreateLogicalPartitionParams& params,
+                       const SnapshotStatus& snapshot_status, AutoDeviceList* created_devices,
+                       std::string* cow_name);
+
+    // The reverse of MapCowDevices.
+    bool UnmapCowDevices(LockedFile* lock, const std::string& name);
+
+    // The reverse of MapPartitionWithSnapshot.
+    bool UnmapPartitionWithSnapshot(LockedFile* lock, const std::string& target_partition_name);
+
+    // If there isn't a previous update, return true. |needs_merge| is set to false.
+    // If there is a previous update but the device has not boot into it, tries to cancel the
+    //   update and delete any snapshots. Return true if successful. |needs_merge| is set to false.
+    // If there is a previous update and the device has boot into it, do nothing and return true.
+    //   |needs_merge| is set to true.
+    bool TryCancelUpdate(bool* needs_merge);
+
+    // Helper for CreateUpdateSnapshots.
+    // Creates all underlying images, COW partitions and snapshot files. Does not initialize them.
+    bool CreateUpdateSnapshotsInternal(LockedFile* lock, const DeltaArchiveManifest& manifest,
+                                       PartitionCowCreator* cow_creator,
+                                       AutoDeviceList* created_devices,
+                                       std::map<std::string, SnapshotStatus>* all_snapshot_status);
+
+    // Initialize snapshots so that they can be mapped later.
+    // Map the COW partition and zero-initialize the header.
+    bool InitializeUpdateSnapshots(
+            LockedFile* lock, MetadataBuilder* target_metadata,
+            const LpMetadata* exported_target_metadata, const std::string& target_suffix,
+            const std::map<std::string, SnapshotStatus>& all_snapshot_status);
+
+    // Unmap all partitions that were mapped by CreateLogicalAndSnapshotPartitions.
+    // This should only be called in recovery.
+    bool UnmapAllPartitions();
+
     std::string gsid_dir_;
     std::string metadata_dir_;
     std::unique_ptr<IDeviceInfo> device_;
     std::unique_ptr<IImageManager> images_;
+    bool has_local_image_manager_ = false;
 };
 
 }  // namespace snapshot
diff --git a/fs_mgr/libsnapshot/include_test/libsnapshot/test_helpers.h b/fs_mgr/libsnapshot/include_test/libsnapshot/test_helpers.h
new file mode 100644
index 0000000..2bf1b57
--- /dev/null
+++ b/fs_mgr/libsnapshot/include_test/libsnapshot/test_helpers.h
@@ -0,0 +1,159 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <optional>
+#include <string>
+#include <unordered_set>
+
+#include <android/hardware/boot/1.1/IBootControl.h>
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+#include <libfiemap/image_manager.h>
+#include <liblp/mock_property_fetcher.h>
+#include <liblp/partition_opener.h>
+#include <libsnapshot/snapshot.h>
+#include <storage_literals/storage_literals.h>
+#include <update_engine/update_metadata.pb.h>
+
+namespace android {
+namespace snapshot {
+
+using android::fs_mgr::IPropertyFetcher;
+using android::fs_mgr::MetadataBuilder;
+using android::fs_mgr::testing::MockPropertyFetcher;
+using android::hardware::boot::V1_1::MergeStatus;
+using chromeos_update_engine::DeltaArchiveManifest;
+using chromeos_update_engine::PartitionUpdate;
+using testing::_;
+using testing::AssertionResult;
+using testing::NiceMock;
+using testing::Return;
+
+using namespace android::storage_literals;
+using namespace std::string_literals;
+
+// These are not reset between each test because it's expensive to create
+// these resources (starting+connecting to gsid, zero-filling images).
+extern std::unique_ptr<SnapshotManager> sm;
+extern class TestDeviceInfo* test_device;
+extern std::string fake_super;
+static constexpr uint64_t kSuperSize = 16_MiB + 4_KiB;
+static constexpr uint64_t kGroupSize = 16_MiB;
+
+// Redirect requests for "super" to our fake super partition.
+class TestPartitionOpener final : public android::fs_mgr::PartitionOpener {
+  public:
+    explicit TestPartitionOpener(const std::string& fake_super_path)
+        : fake_super_path_(fake_super_path) {}
+
+    android::base::unique_fd Open(const std::string& partition_name, int flags) const override;
+    bool GetInfo(const std::string& partition_name,
+                 android::fs_mgr::BlockDeviceInfo* info) const override;
+    std::string GetDeviceString(const std::string& partition_name) const override;
+
+  private:
+    std::string fake_super_path_;
+};
+
+class TestDeviceInfo : public SnapshotManager::IDeviceInfo {
+  public:
+    TestDeviceInfo() {}
+    explicit TestDeviceInfo(const std::string& fake_super) { set_fake_super(fake_super); }
+    TestDeviceInfo(const std::string& fake_super, const std::string& slot_suffix)
+        : TestDeviceInfo(fake_super) {
+        set_slot_suffix(slot_suffix);
+    }
+    std::string GetGsidDir() const override { return "ota/test"s; }
+    std::string GetMetadataDir() const override { return "/metadata/ota/test"s; }
+    std::string GetSlotSuffix() const override { return slot_suffix_; }
+    std::string GetOtherSlotSuffix() const override { return slot_suffix_ == "_a" ? "_b" : "_a"; }
+    std::string GetSuperDevice([[maybe_unused]] uint32_t slot) const override { return "super"; }
+    const android::fs_mgr::IPartitionOpener& GetPartitionOpener() const override {
+        return *opener_.get();
+    }
+    bool SetBootControlMergeStatus(MergeStatus status) override {
+        merge_status_ = status;
+        return true;
+    }
+    bool IsOverlayfsSetup() const override { return false; }
+    bool IsRecovery() const override { return recovery_; }
+    bool SetSlotAsUnbootable(unsigned int slot) override {
+        unbootable_slots_.insert(slot);
+        return true;
+    }
+
+    bool IsSlotUnbootable(uint32_t slot) { return unbootable_slots_.count(slot) != 0; }
+
+    void set_slot_suffix(const std::string& suffix) { slot_suffix_ = suffix; }
+    void set_fake_super(const std::string& path) {
+        opener_ = std::make_unique<TestPartitionOpener>(path);
+    }
+    void set_recovery(bool value) { recovery_ = value; }
+    MergeStatus merge_status() const { return merge_status_; }
+
+  private:
+    std::string slot_suffix_ = "_a";
+    std::unique_ptr<TestPartitionOpener> opener_;
+    MergeStatus merge_status_;
+    bool recovery_ = false;
+    std::unordered_set<uint32_t> unbootable_slots_;
+};
+
+class SnapshotTestPropertyFetcher : public android::fs_mgr::testing::MockPropertyFetcher {
+  public:
+    SnapshotTestPropertyFetcher(const std::string& slot_suffix) {
+        ON_CALL(*this, GetProperty("ro.boot.slot_suffix", _)).WillByDefault(Return(slot_suffix));
+        ON_CALL(*this, GetBoolProperty("ro.boot.dynamic_partitions", _))
+                .WillByDefault(Return(true));
+        ON_CALL(*this, GetBoolProperty("ro.boot.dynamic_partitions_retrofit", _))
+                .WillByDefault(Return(false));
+        ON_CALL(*this, GetBoolProperty("ro.virtual_ab.enabled", _)).WillByDefault(Return(true));
+    }
+
+    static void SetUp(const std::string& slot_suffix = "_a") { Reset(slot_suffix); }
+
+    static void TearDown() { Reset("_a"); }
+
+  private:
+    static void Reset(const std::string& slot_suffix) {
+        IPropertyFetcher::OverrideForTesting(
+                std::make_unique<NiceMock<SnapshotTestPropertyFetcher>>(slot_suffix));
+    }
+};
+
+// Helper for error-spam-free cleanup.
+void DeleteBackingImage(android::fiemap::IImageManager* manager, const std::string& name);
+
+// Write some random data to the given device.
+// If expect_size is not specified, will write until reaching end of the device.
+// Expect space of |path| is multiple of 4K.
+bool WriteRandomData(const std::string& path, std::optional<size_t> expect_size = std::nullopt,
+                     std::string* hash = nullptr);
+
+std::optional<std::string> GetHash(const std::string& path);
+
+// Add partitions and groups described by |manifest|.
+AssertionResult FillFakeMetadata(MetadataBuilder* builder, const DeltaArchiveManifest& manifest,
+                                 const std::string& suffix);
+
+// In the update package metadata, set a partition with the given size.
+void SetSize(PartitionUpdate* partition_update, uint64_t size);
+
+// Get partition size from update package metadata.
+uint64_t GetSize(PartitionUpdate* partition_update);
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/partition_cow_creator.cpp b/fs_mgr/libsnapshot/partition_cow_creator.cpp
new file mode 100644
index 0000000..61f5c0c
--- /dev/null
+++ b/fs_mgr/libsnapshot/partition_cow_creator.cpp
@@ -0,0 +1,175 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "partition_cow_creator.h"
+
+#include <math.h>
+
+#include <android-base/logging.h>
+#include <android/snapshot/snapshot.pb.h>
+
+#include "dm_snapshot_internals.h"
+#include "utility.h"
+
+using android::dm::kSectorSize;
+using android::fs_mgr::Extent;
+using android::fs_mgr::Interval;
+using android::fs_mgr::kDefaultBlockSize;
+using android::fs_mgr::Partition;
+using chromeos_update_engine::InstallOperation;
+template <typename T>
+using RepeatedPtrField = google::protobuf::RepeatedPtrField<T>;
+
+namespace android {
+namespace snapshot {
+
+// Intersect two linear extents. If no intersection, return an extent with length 0.
+static std::unique_ptr<Extent> Intersect(Extent* target_extent, Extent* existing_extent) {
+    // Convert target_extent and existing_extent to linear extents. Zero extents
+    // doesn't matter and doesn't result in any intersection.
+    auto existing_linear_extent = existing_extent->AsLinearExtent();
+    if (!existing_linear_extent) return nullptr;
+
+    auto target_linear_extent = target_extent->AsLinearExtent();
+    if (!target_linear_extent) return nullptr;
+
+    return Interval::Intersect(target_linear_extent->AsInterval(),
+                               existing_linear_extent->AsInterval())
+            .AsExtent();
+}
+
+// Check that partition |p| contains |e| fully. Both of them should
+// be from |target_metadata|.
+// Returns true as long as |e| is a subrange of any extent of |p|.
+bool PartitionCowCreator::HasExtent(Partition* p, Extent* e) {
+    for (auto& partition_extent : p->extents()) {
+        auto intersection = Intersect(partition_extent.get(), e);
+        if (intersection != nullptr && intersection->num_sectors() == e->num_sectors()) {
+            return true;
+        }
+    }
+    return false;
+}
+
+bool SourceCopyOperationIsClone(const InstallOperation& operation) {
+    using ChromeOSExtent = chromeos_update_engine::Extent;
+    if (operation.src_extents().size() != operation.dst_extents().size()) {
+        return false;
+    }
+    return std::equal(operation.src_extents().begin(), operation.src_extents().end(),
+                      operation.dst_extents().begin(),
+                      [](const ChromeOSExtent& src, const ChromeOSExtent& dst) {
+                          return src.start_block() == dst.start_block() &&
+                                 src.num_blocks() == dst.num_blocks();
+                      });
+}
+
+void WriteExtent(DmSnapCowSizeCalculator* sc, const chromeos_update_engine::Extent& de,
+                 unsigned int sectors_per_block) {
+    const auto block_boundary = de.start_block() + de.num_blocks();
+    for (auto b = de.start_block(); b < block_boundary; ++b) {
+        for (unsigned int s = 0; s < sectors_per_block; ++s) {
+            const auto sector_id = b * sectors_per_block + s;
+            sc->WriteSector(sector_id);
+        }
+    }
+}
+
+uint64_t PartitionCowCreator::GetCowSize() {
+    // WARNING: The origin partition should be READ-ONLY
+    const uint64_t logical_block_size = current_metadata->logical_block_size();
+    const unsigned int sectors_per_block = logical_block_size / kSectorSize;
+    DmSnapCowSizeCalculator sc(kSectorSize, kSnapshotChunkSize);
+
+    // Allocate space for extra extents (if any). These extents are those that can be
+    // used for error corrections or to store verity hash trees.
+    for (const auto& de : extra_extents) {
+        WriteExtent(&sc, de, sectors_per_block);
+    }
+
+    if (operations == nullptr) return sc.cow_size_bytes();
+
+    for (const auto& iop : *operations) {
+        // Do not allocate space for operations that are going to be skipped
+        // during OTA application.
+        if (iop.type() == InstallOperation::SOURCE_COPY && SourceCopyOperationIsClone(iop))
+            continue;
+
+        for (const auto& de : iop.dst_extents()) {
+            WriteExtent(&sc, de, sectors_per_block);
+        }
+    }
+
+    return sc.cow_size_bytes();
+}
+
+std::optional<PartitionCowCreator::Return> PartitionCowCreator::Run() {
+    CHECK(current_metadata->GetBlockDevicePartitionName(0) == LP_METADATA_DEFAULT_PARTITION_NAME &&
+          target_metadata->GetBlockDevicePartitionName(0) == LP_METADATA_DEFAULT_PARTITION_NAME);
+
+    const uint64_t logical_block_size = current_metadata->logical_block_size();
+    CHECK(logical_block_size != 0 && !(logical_block_size & (logical_block_size - 1)))
+            << "logical_block_size is not power of 2";
+
+    Return ret;
+    ret.snapshot_status.set_name(target_partition->name());
+    ret.snapshot_status.set_device_size(target_partition->size());
+    ret.snapshot_status.set_snapshot_size(target_partition->size());
+
+    // Being the COW partition virtual, its size doesn't affect the storage
+    // memory that will be occupied by the target.
+    // The actual storage space is affected by the COW file, whose size depends
+    // on the chunks that diverged between |current| and |target|.
+    // If the |target| partition is bigger than |current|, the data that is
+    // modified outside of |current| can be written directly to |current|.
+    // This because the data that will be written outside of |current| would
+    // not invalidate any useful information of |current|, thus:
+    // - if the snapshot is accepted for merge, this data would be already at
+    // the right place and should not be copied;
+    // - in the unfortunate case of the snapshot to be discarded, the regions
+    // modified by this data can be set as free regions and reused.
+    // Compute regions that are free in both current and target metadata. These are the regions
+    // we can use for COW partition.
+    auto target_free_regions = target_metadata->GetFreeRegions();
+    auto current_free_regions = current_metadata->GetFreeRegions();
+    auto free_regions = Interval::Intersect(target_free_regions, current_free_regions);
+    uint64_t free_region_length = 0;
+    for (const auto& interval : free_regions) {
+        free_region_length += interval.length();
+    }
+    free_region_length *= kSectorSize;
+
+    LOG(INFO) << "Remaining free space for COW: " << free_region_length << " bytes";
+    auto cow_size = GetCowSize();
+
+    // Compute the COW partition size.
+    uint64_t cow_partition_size = std::min(cow_size, free_region_length);
+    // Round it down to the nearest logical block. Logical partitions must be a multiple
+    // of logical blocks.
+    cow_partition_size &= ~(logical_block_size - 1);
+    ret.snapshot_status.set_cow_partition_size(cow_partition_size);
+    // Assign cow_partition_usable_regions to indicate what regions should the COW partition uses.
+    ret.cow_partition_usable_regions = std::move(free_regions);
+
+    auto cow_file_size = cow_size - cow_partition_size;
+    // Round it up to the nearest sector.
+    cow_file_size += kSectorSize - 1;
+    cow_file_size &= ~(kSectorSize - 1);
+    ret.snapshot_status.set_cow_file_size(cow_file_size);
+
+    return ret;
+}
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/partition_cow_creator.h b/fs_mgr/libsnapshot/partition_cow_creator.h
new file mode 100644
index 0000000..699f9a1
--- /dev/null
+++ b/fs_mgr/libsnapshot/partition_cow_creator.h
@@ -0,0 +1,72 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <stdint.h>
+
+#include <optional>
+#include <string>
+#include <vector>
+
+#include <liblp/builder.h>
+#include <update_engine/update_metadata.pb.h>
+
+#include <android/snapshot/snapshot.pb.h>
+
+namespace android {
+namespace snapshot {
+
+// Helper class that creates COW for a partition.
+struct PartitionCowCreator {
+    using Extent = android::fs_mgr::Extent;
+    using ChromeOSExtent = chromeos_update_engine::Extent;
+    using Interval = android::fs_mgr::Interval;
+    using MetadataBuilder = android::fs_mgr::MetadataBuilder;
+    using Partition = android::fs_mgr::Partition;
+    using InstallOperation = chromeos_update_engine::InstallOperation;
+    template <typename T>
+    using RepeatedPtrField = google::protobuf::RepeatedPtrField<T>;
+
+    // The metadata that will be written to target metadata slot.
+    MetadataBuilder* target_metadata = nullptr;
+    // The suffix of the target slot.
+    std::string target_suffix;
+    // The partition in target_metadata that needs to be snapshotted.
+    Partition* target_partition = nullptr;
+    // The metadata at the current slot (that would be used if the device boots
+    // normally). This is used to determine which extents are being used.
+    MetadataBuilder* current_metadata = nullptr;
+    // The suffix of the current slot.
+    std::string current_suffix;
+    // List of operations to be applied on the partition.
+    const RepeatedPtrField<InstallOperation>* operations = nullptr;
+    // Extra extents that are going to be invalidated during the update
+    // process.
+    std::vector<ChromeOSExtent> extra_extents = {};
+
+    struct Return {
+        SnapshotStatus snapshot_status;
+        std::vector<Interval> cow_partition_usable_regions;
+    };
+
+    std::optional<Return> Run();
+
+  private:
+    bool HasExtent(Partition* p, Extent* e);
+    uint64_t GetCowSize();
+};
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/partition_cow_creator_test.cpp b/fs_mgr/libsnapshot/partition_cow_creator_test.cpp
new file mode 100644
index 0000000..9da3f05
--- /dev/null
+++ b/fs_mgr/libsnapshot/partition_cow_creator_test.cpp
@@ -0,0 +1,217 @@
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+#include <libdm/dm.h>
+#include <liblp/builder.h>
+#include <liblp/property_fetcher.h>
+
+#include <libsnapshot/test_helpers.h>
+
+#include "dm_snapshot_internals.h"
+#include "partition_cow_creator.h"
+#include "utility.h"
+
+using namespace android::fs_mgr;
+
+namespace android {
+namespace snapshot {
+
+class PartitionCowCreatorTest : public ::testing::Test {
+  public:
+    void SetUp() override { SnapshotTestPropertyFetcher::SetUp(); }
+    void TearDown() override { SnapshotTestPropertyFetcher::TearDown(); }
+};
+
+TEST_F(PartitionCowCreatorTest, IntersectSelf) {
+    constexpr uint64_t initial_size = 1_MiB;
+    constexpr uint64_t final_size = 40_KiB;
+
+    auto builder_a = MetadataBuilder::New(initial_size, 1_KiB, 2);
+    ASSERT_NE(builder_a, nullptr);
+    auto system_a = builder_a->AddPartition("system_a", LP_PARTITION_ATTR_READONLY);
+    ASSERT_NE(system_a, nullptr);
+    ASSERT_TRUE(builder_a->ResizePartition(system_a, final_size));
+
+    auto builder_b = MetadataBuilder::New(initial_size, 1_KiB, 2);
+    ASSERT_NE(builder_b, nullptr);
+    auto system_b = builder_b->AddPartition("system_b", LP_PARTITION_ATTR_READONLY);
+    ASSERT_NE(system_b, nullptr);
+    ASSERT_TRUE(builder_b->ResizePartition(system_b, final_size));
+
+    PartitionCowCreator creator{.target_metadata = builder_b.get(),
+                                .target_suffix = "_b",
+                                .target_partition = system_b,
+                                .current_metadata = builder_a.get(),
+                                .current_suffix = "_a"};
+    auto ret = creator.Run();
+    ASSERT_TRUE(ret.has_value());
+    ASSERT_EQ(final_size, ret->snapshot_status.device_size());
+    ASSERT_EQ(final_size, ret->snapshot_status.snapshot_size());
+}
+
+TEST_F(PartitionCowCreatorTest, Holes) {
+    const auto& opener = test_device->GetPartitionOpener();
+
+    constexpr auto slack_space = 1_MiB;
+    constexpr auto big_size = (kSuperSize - slack_space) / 2;
+    constexpr auto small_size = big_size / 2;
+
+    BlockDeviceInfo super_device("super", kSuperSize, 0, 0, 4_KiB);
+    std::vector<BlockDeviceInfo> devices = {super_device};
+    auto source = MetadataBuilder::New(devices, "super", 1_KiB, 2);
+    auto system = source->AddPartition("system_a", 0);
+    ASSERT_NE(nullptr, system);
+    ASSERT_TRUE(source->ResizePartition(system, big_size));
+    auto vendor = source->AddPartition("vendor_a", 0);
+    ASSERT_NE(nullptr, vendor);
+    ASSERT_TRUE(source->ResizePartition(vendor, big_size));
+    // Create a hole between system and vendor
+    ASSERT_TRUE(source->ResizePartition(system, small_size));
+    auto source_metadata = source->Export();
+    ASSERT_NE(nullptr, source_metadata);
+    ASSERT_TRUE(FlashPartitionTable(opener, fake_super, *source_metadata.get()));
+
+    auto target = MetadataBuilder::NewForUpdate(opener, "super", 0, 1);
+    // Shrink vendor
+    vendor = target->FindPartition("vendor_b");
+    ASSERT_NE(nullptr, vendor);
+    ASSERT_TRUE(target->ResizePartition(vendor, small_size));
+    // Grow system to take hole & saved space from vendor
+    system = target->FindPartition("system_b");
+    ASSERT_NE(nullptr, system);
+    ASSERT_TRUE(target->ResizePartition(system, big_size * 2 - small_size));
+
+    PartitionCowCreator creator{.target_metadata = target.get(),
+                                .target_suffix = "_b",
+                                .target_partition = system,
+                                .current_metadata = source.get(),
+                                .current_suffix = "_a"};
+    auto ret = creator.Run();
+    ASSERT_TRUE(ret.has_value());
+}
+
+TEST_F(PartitionCowCreatorTest, CowSize) {
+    using InstallOperation = chromeos_update_engine::InstallOperation;
+    using RepeatedInstallOperationPtr = google::protobuf::RepeatedPtrField<InstallOperation>;
+    using Extent = chromeos_update_engine::Extent;
+
+    constexpr uint64_t initial_size = 50_MiB;
+    constexpr uint64_t final_size = 40_MiB;
+
+    auto builder_a = MetadataBuilder::New(initial_size, 1_KiB, 2);
+    ASSERT_NE(builder_a, nullptr);
+    auto system_a = builder_a->AddPartition("system_a", LP_PARTITION_ATTR_READONLY);
+    ASSERT_NE(system_a, nullptr);
+    ASSERT_TRUE(builder_a->ResizePartition(system_a, final_size));
+
+    auto builder_b = MetadataBuilder::New(initial_size, 1_KiB, 2);
+    ASSERT_NE(builder_b, nullptr);
+    auto system_b = builder_b->AddPartition("system_b", LP_PARTITION_ATTR_READONLY);
+    ASSERT_NE(system_b, nullptr);
+    ASSERT_TRUE(builder_b->ResizePartition(system_b, final_size));
+
+    const uint64_t block_size = builder_b->logical_block_size();
+    const uint64_t chunk_size = kSnapshotChunkSize * dm::kSectorSize;
+    ASSERT_EQ(chunk_size, block_size);
+
+    auto cow_device_size = [](const std::vector<InstallOperation>& iopv, MetadataBuilder* builder_a,
+                              MetadataBuilder* builder_b, Partition* system_b) {
+        RepeatedInstallOperationPtr riop(iopv.begin(), iopv.end());
+        PartitionCowCreator creator{.target_metadata = builder_b,
+                                    .target_suffix = "_b",
+                                    .target_partition = system_b,
+                                    .current_metadata = builder_a,
+                                    .current_suffix = "_a",
+                                    .operations = &riop};
+
+        auto ret = creator.Run();
+
+        if (ret.has_value()) {
+            return ret->snapshot_status.cow_file_size() + ret->snapshot_status.cow_partition_size();
+        }
+        return std::numeric_limits<uint64_t>::max();
+    };
+
+    std::vector<InstallOperation> iopv;
+    InstallOperation iop;
+    Extent* e;
+
+    // No data written, no operations performed
+    ASSERT_EQ(2 * chunk_size, cow_device_size(iopv, builder_a.get(), builder_b.get(), system_b));
+
+    // No data written
+    e = iop.add_dst_extents();
+    e->set_start_block(0);
+    e->set_num_blocks(0);
+    iopv.push_back(iop);
+    ASSERT_EQ(2 * chunk_size, cow_device_size(iopv, builder_a.get(), builder_b.get(), system_b));
+
+    e = iop.add_dst_extents();
+    e->set_start_block(1);
+    e->set_num_blocks(0);
+    iopv.push_back(iop);
+    ASSERT_EQ(2 * chunk_size, cow_device_size(iopv, builder_a.get(), builder_b.get(), system_b));
+
+    // Fill the first block
+    e = iop.add_dst_extents();
+    e->set_start_block(0);
+    e->set_num_blocks(1);
+    iopv.push_back(iop);
+    ASSERT_EQ(3 * chunk_size, cow_device_size(iopv, builder_a.get(), builder_b.get(), system_b));
+
+    // Fill the second block
+    e = iop.add_dst_extents();
+    e->set_start_block(1);
+    e->set_num_blocks(1);
+    iopv.push_back(iop);
+    ASSERT_EQ(4 * chunk_size, cow_device_size(iopv, builder_a.get(), builder_b.get(), system_b));
+
+    // Jump to 5th block and write 2
+    e = iop.add_dst_extents();
+    e->set_start_block(5);
+    e->set_num_blocks(2);
+    iopv.push_back(iop);
+    ASSERT_EQ(6 * chunk_size, cow_device_size(iopv, builder_a.get(), builder_b.get(), system_b));
+}
+
+TEST(DmSnapshotInternals, CowSizeCalculator) {
+    DmSnapCowSizeCalculator cc(512, 8);
+    unsigned long int b;
+
+    // Empty COW
+    ASSERT_EQ(cc.cow_size_sectors(), 16);
+
+    // First chunk written
+    for (b = 0; b < 4_KiB; ++b) {
+        cc.WriteByte(b);
+        ASSERT_EQ(cc.cow_size_sectors(), 24);
+    }
+
+    // Second chunk written
+    for (b = 4_KiB; b < 8_KiB; ++b) {
+        cc.WriteByte(b);
+        ASSERT_EQ(cc.cow_size_sectors(), 32);
+    }
+
+    // Leave a hole and write 5th chunk
+    for (b = 16_KiB; b < 20_KiB; ++b) {
+        cc.WriteByte(b);
+        ASSERT_EQ(cc.cow_size_sectors(), 40);
+    }
+}
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/snapshot.cpp b/fs_mgr/libsnapshot/snapshot.cpp
index 63a01f3..830495c 100644
--- a/fs_mgr/libsnapshot/snapshot.cpp
+++ b/fs_mgr/libsnapshot/snapshot.cpp
@@ -15,11 +15,14 @@
 #include <libsnapshot/snapshot.h>
 
 #include <dirent.h>
+#include <math.h>
 #include <sys/file.h>
 #include <sys/types.h>
 #include <sys/unistd.h>
 
+#include <optional>
 #include <thread>
+#include <unordered_set>
 
 #include <android-base/file.h>
 #include <android-base/logging.h>
@@ -27,8 +30,18 @@
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
 #include <ext4_utils/ext4_utils.h>
+#include <fs_mgr.h>
+#include <fs_mgr_dm_linear.h>
+#include <fstab/fstab.h>
 #include <libdm/dm.h>
 #include <libfiemap/image_manager.h>
+#include <liblp/liblp.h>
+
+#include <android/snapshot/snapshot.pb.h>
+#include "device_info.h"
+#include "partition_cow_creator.h"
+#include "snapshot_metadata_updater.h"
+#include "utility.h"
 
 namespace android {
 namespace snapshot {
@@ -42,25 +55,27 @@
 using android::dm::kSectorSize;
 using android::dm::SnapshotStorageMode;
 using android::fiemap::IImageManager;
+using android::fs_mgr::CreateDmTable;
+using android::fs_mgr::CreateLogicalPartition;
+using android::fs_mgr::CreateLogicalPartitionParams;
+using android::fs_mgr::GetPartitionGroupName;
+using android::fs_mgr::GetPartitionName;
+using android::fs_mgr::LpMetadata;
+using android::fs_mgr::MetadataBuilder;
+using android::fs_mgr::SlotNumberForSlotSuffix;
+using android::hardware::boot::V1_1::MergeStatus;
+using chromeos_update_engine::DeltaArchiveManifest;
+using chromeos_update_engine::Extent;
+using chromeos_update_engine::InstallOperation;
+template <typename T>
+using RepeatedPtrField = google::protobuf::RepeatedPtrField<T>;
+using std::chrono::duration_cast;
 using namespace std::chrono_literals;
 using namespace std::string_literals;
 
-// Unit is sectors, this is a 4K chunk.
-static constexpr uint32_t kSnapshotChunkSize = 8;
+static constexpr char kBootIndicatorPath[] = "/metadata/ota/snapshot-boot";
 
-class DeviceInfo final : public SnapshotManager::IDeviceInfo {
-  public:
-    std::string GetGsidDir() const override { return "ota"s; }
-    std::string GetMetadataDir() const override { return "/metadata/ota"s; }
-    bool IsRunningSnapshot() const override;
-};
-
-bool DeviceInfo::IsRunningSnapshot() const {
-    // :TODO: implement this check.
-    return true;
-}
-
-// Note: IIMageManager is an incomplete type in the header, so the default
+// Note: IImageManager is an incomplete type in the header, so the default
 // destructor doesn't work.
 SnapshotManager::~SnapshotManager() {}
 
@@ -71,6 +86,14 @@
     return std::unique_ptr<SnapshotManager>(new SnapshotManager(info));
 }
 
+std::unique_ptr<SnapshotManager> SnapshotManager::NewForFirstStageMount(IDeviceInfo* info) {
+    auto sm = New(info);
+    if (!sm || !sm->ForceLocalImageManager()) {
+        return nullptr;
+    }
+    return sm;
+}
+
 SnapshotManager::SnapshotManager(IDeviceInfo* device) : device_(device) {
     gsid_dir_ = device_->GetGsidDir();
     metadata_dir_ = device_->GetMetadataDir();
@@ -80,10 +103,39 @@
     return snapshot_name + "-cow";
 }
 
+static std::string GetCowImageDeviceName(const std::string& snapshot_name) {
+    return snapshot_name + "-cow-img";
+}
+
+static std::string GetBaseDeviceName(const std::string& partition_name) {
+    return partition_name + "-base";
+}
+
+static std::string GetSnapshotExtraDeviceName(const std::string& snapshot_name) {
+    return snapshot_name + "-inner";
+}
+
 bool SnapshotManager::BeginUpdate() {
+    bool needs_merge = false;
+    if (!TryCancelUpdate(&needs_merge)) {
+        return false;
+    }
+    if (needs_merge) {
+        LOG(INFO) << "Wait for merge (if any) before beginning a new update.";
+        auto state = ProcessUpdateState();
+        LOG(INFO) << "Merged with state = " << state;
+    }
+
     auto file = LockExclusive();
     if (!file) return false;
 
+    // Purge the ImageManager just in case there is a corrupt lp_metadata file
+    // lying around. (NB: no need to return false on an error, we can let the
+    // update try to progress.)
+    if (EnsureImageManager()) {
+        images_->RemoveAllImages();
+    }
+
     auto state = ReadUpdateState(file.get());
     if (state != UpdateState::None) {
         LOG(ERROR) << "An update is already in progress, cannot begin a new update";
@@ -93,93 +145,178 @@
 }
 
 bool SnapshotManager::CancelUpdate() {
+    bool needs_merge = false;
+    if (!TryCancelUpdate(&needs_merge)) {
+        return false;
+    }
+    if (needs_merge) {
+        LOG(ERROR) << "Cannot cancel update after it has completed or started merging";
+    }
+    return !needs_merge;
+}
+
+bool SnapshotManager::TryCancelUpdate(bool* needs_merge) {
+    *needs_merge = false;
+
     auto file = LockExclusive();
     if (!file) return false;
 
     UpdateState state = ReadUpdateState(file.get());
     if (state == UpdateState::None) return true;
-    if (state != UpdateState::Initiated) {
-        LOG(ERROR) << "Cannot cancel update after it has completed or started merging";
-        return false;
+
+    if (state == UpdateState::Initiated) {
+        LOG(INFO) << "Update has been initiated, now canceling";
+        return RemoveAllUpdateState(file.get());
     }
 
-    if (!RemoveAllSnapshots(file.get())) {
+    if (state == UpdateState::Unverified) {
+        // We completed an update, but it can still be canceled if we haven't booted into it.
+        auto boot_file = GetSnapshotBootIndicatorPath();
+        std::string contents;
+        if (!android::base::ReadFileToString(boot_file, &contents)) {
+            PLOG(WARNING) << "Cannot read " << boot_file << ", proceed to canceling the update:";
+            return RemoveAllUpdateState(file.get());
+        }
+        if (device_->GetSlotSuffix() == contents) {
+            LOG(INFO) << "Canceling a previously completed update";
+            return RemoveAllUpdateState(file.get());
+        }
+    }
+    *needs_merge = true;
+    return true;
+}
+
+bool SnapshotManager::RemoveAllUpdateState(LockedFile* lock) {
+    if (!RemoveAllSnapshots(lock)) {
         LOG(ERROR) << "Could not remove all snapshots";
         return false;
     }
 
-    if (!WriteUpdateState(file.get(), UpdateState::None)) {
-        LOG(ERROR) << "Could not write new update state";
+    RemoveSnapshotBootIndicator();
+
+    // If this fails, we'll keep trying to remove the update state (as the
+    // device reboots or starts a new update) until it finally succeeds.
+    return WriteUpdateState(lock, UpdateState::None);
+}
+
+bool SnapshotManager::FinishedSnapshotWrites() {
+    auto lock = LockExclusive();
+    if (!lock) return false;
+
+    auto update_state = ReadUpdateState(lock.get());
+    if (update_state == UpdateState::Unverified) {
+        LOG(INFO) << "FinishedSnapshotWrites already called before. Ignored.";
+        return true;
+    }
+
+    if (update_state != UpdateState::Initiated) {
+        LOG(ERROR) << "Can only transition to the Unverified state from the Initiated state.";
+        return false;
+    }
+
+    // This file acts as both a quick indicator for init (it can use access(2)
+    // to decide how to do first-stage mounts), and it stores the old slot, so
+    // we can tell whether or not we performed a rollback.
+    auto contents = device_->GetSlotSuffix();
+    auto boot_file = GetSnapshotBootIndicatorPath();
+    if (!WriteStringToFileAtomic(contents, boot_file)) {
+        PLOG(ERROR) << "write failed: " << boot_file;
+        return false;
+    }
+    return WriteUpdateState(lock.get(), UpdateState::Unverified);
+}
+
+bool SnapshotManager::CreateSnapshot(LockedFile* lock, SnapshotStatus* status) {
+    CHECK(lock);
+    CHECK(lock->lock_mode() == LOCK_EX);
+    CHECK(status);
+
+    if (status->name().empty()) {
+        LOG(ERROR) << "SnapshotStatus has no name.";
+        return false;
+    }
+    // Sanity check these sizes. Like liblp, we guarantee the partition size
+    // is respected, which means it has to be sector-aligned. (This guarantee
+    // is useful for locating avb footers correctly). The COW file size, however,
+    // can be arbitrarily larger than specified, so we can safely round it up.
+    if (status->device_size() % kSectorSize != 0) {
+        LOG(ERROR) << "Snapshot " << status->name()
+                   << " device size is not a multiple of the sector size: "
+                   << status->device_size();
+        return false;
+    }
+    if (status->snapshot_size() % kSectorSize != 0) {
+        LOG(ERROR) << "Snapshot " << status->name()
+                   << " snapshot size is not a multiple of the sector size: "
+                   << status->snapshot_size();
+        return false;
+    }
+    if (status->cow_partition_size() % kSectorSize != 0) {
+        LOG(ERROR) << "Snapshot " << status->name()
+                   << " cow partition size is not a multiple of the sector size: "
+                   << status->cow_partition_size();
+        return false;
+    }
+    if (status->cow_file_size() % kSectorSize != 0) {
+        LOG(ERROR) << "Snapshot " << status->name()
+                   << " cow file size is not a multiple of the sector size: "
+                   << status->cow_file_size();
+        return false;
+    }
+
+    status->set_state(SnapshotState::CREATED);
+    status->set_sectors_allocated(0);
+    status->set_metadata_sectors(0);
+
+    if (!WriteSnapshotStatus(lock, *status)) {
+        PLOG(ERROR) << "Could not write snapshot status: " << status->name();
         return false;
     }
     return true;
 }
 
-bool SnapshotManager::CreateSnapshot(LockedFile* lock, const std::string& name,
-                                     uint64_t device_size, uint64_t snapshot_size,
-                                     uint64_t cow_size) {
+bool SnapshotManager::CreateCowImage(LockedFile* lock, const std::string& name) {
     CHECK(lock);
-    if (!EnsureImageManager()) return false;
-
-    // Sanity check these sizes. Like liblp, we guarantee the partition size
-    // is respected, which means it has to be sector-aligned. (This guarantee
-    // is useful for locating avb footers correctly). The COW size, however,
-    // can be arbitrarily larger than specified, so we can safely round it up.
-    if (device_size % kSectorSize != 0) {
-        LOG(ERROR) << "Snapshot " << name
-                   << " device size is not a multiple of the sector size: " << device_size;
-        return false;
-    }
-    if (snapshot_size % kSectorSize != 0) {
-        LOG(ERROR) << "Snapshot " << name
-                   << " snapshot size is not a multiple of the sector size: " << snapshot_size;
-        return false;
-    }
-
-    // Round the COW size up to the nearest sector.
-    cow_size += kSectorSize - 1;
-    cow_size &= ~(kSectorSize - 1);
-
-    LOG(INFO) << "Snapshot " << name << " will have COW size " << cow_size;
-
-    // Note, we leave the status file hanging around if we fail to create the
-    // actual backing image. This is harmless, since it'll get removed when
-    // CancelUpdate is called.
-    SnapshotStatus status = {
-            .state = "created",
-            .device_size = device_size,
-            .snapshot_size = snapshot_size,
-    };
-    if (!WriteSnapshotStatus(lock, name, status)) {
-        PLOG(ERROR) << "Could not write snapshot status: " << name;
-        return false;
-    }
-
-    auto cow_name = GetCowName(name);
-    int cow_flags = IImageManager::CREATE_IMAGE_ZERO_FILL;
-    return images_->CreateBackingImage(cow_name, cow_size, cow_flags);
-}
-
-bool SnapshotManager::MapSnapshot(LockedFile* lock, const std::string& name,
-                                  const std::string& base_device,
-                                  const std::chrono::milliseconds& timeout_ms,
-                                  std::string* dev_path) {
-    CHECK(lock);
+    CHECK(lock->lock_mode() == LOCK_EX);
     if (!EnsureImageManager()) return false;
 
     SnapshotStatus status;
     if (!ReadSnapshotStatus(lock, name, &status)) {
         return false;
     }
-    if (status.state == "merge-completed") {
+
+    // The COW file size should have been rounded up to the nearest sector in CreateSnapshot.
+    // Sanity check this.
+    if (status.cow_file_size() % kSectorSize != 0) {
+        LOG(ERROR) << "Snapshot " << name << " COW file size is not a multiple of the sector size: "
+                   << status.cow_file_size();
+        return false;
+    }
+
+    std::string cow_image_name = GetCowImageDeviceName(name);
+    int cow_flags = IImageManager::CREATE_IMAGE_DEFAULT;
+    return images_->CreateBackingImage(cow_image_name, status.cow_file_size(), cow_flags);
+}
+
+bool SnapshotManager::MapSnapshot(LockedFile* lock, const std::string& name,
+                                  const std::string& base_device, const std::string& cow_device,
+                                  const std::chrono::milliseconds& timeout_ms,
+                                  std::string* dev_path) {
+    CHECK(lock);
+
+    SnapshotStatus status;
+    if (!ReadSnapshotStatus(lock, name, &status)) {
+        return false;
+    }
+    if (status.state() == SnapshotState::NONE || status.state() == SnapshotState::MERGE_COMPLETED) {
         LOG(ERROR) << "Should not create a snapshot device for " << name
                    << " after merging has completed.";
         return false;
     }
 
     // Validate the block device size, as well as the requested snapshot size.
-    // During this we also compute the linear sector region if any.
-    {
+    // Note that during first-stage init, we don't have the device paths.
+    if (android::base::StartsWith(base_device, "/")) {
         unique_fd fd(open(base_device.c_str(), O_RDONLY | O_CLOEXEC));
         if (fd < 0) {
             PLOG(ERROR) << "open failed: " << base_device;
@@ -190,30 +327,23 @@
             PLOG(ERROR) << "Could not determine block device size: " << base_device;
             return false;
         }
-        if (status.device_size != dev_size) {
+        if (status.device_size() != dev_size) {
             LOG(ERROR) << "Block device size for " << base_device << " does not match"
-                       << "(expected " << status.device_size << ", got " << dev_size << ")";
+                       << "(expected " << status.device_size() << ", got " << dev_size << ")";
             return false;
         }
     }
-    if (status.device_size % kSectorSize != 0) {
-        LOG(ERROR) << "invalid blockdev size for " << base_device << ": " << status.device_size;
+    if (status.device_size() % kSectorSize != 0) {
+        LOG(ERROR) << "invalid blockdev size for " << base_device << ": " << status.device_size();
         return false;
     }
-    if (status.snapshot_size % kSectorSize != 0 || status.snapshot_size > status.device_size) {
-        LOG(ERROR) << "Invalid snapshot size for " << base_device << ": " << status.snapshot_size;
+    if (status.snapshot_size() % kSectorSize != 0 ||
+        status.snapshot_size() > status.device_size()) {
+        LOG(ERROR) << "Invalid snapshot size for " << base_device << ": " << status.snapshot_size();
         return false;
     }
-    uint64_t snapshot_sectors = status.snapshot_size / kSectorSize;
-    uint64_t linear_sectors = (status.device_size - status.snapshot_size) / kSectorSize;
-
-    auto cow_name = GetCowName(name);
-
-    std::string cow_dev;
-    if (!images_->MapImageDevice(cow_name, timeout_ms, &cow_dev)) {
-        LOG(ERROR) << "Could not map image device: " << cow_name;
-        return false;
-    }
+    uint64_t snapshot_sectors = status.snapshot_size() / kSectorSize;
+    uint64_t linear_sectors = (status.device_size() - status.snapshot_size()) / kSectorSize;
 
     auto& dm = DeviceMapper::Instance();
 
@@ -242,30 +372,34 @@
     // and a linear target in the same table. Instead, we stack them, and give the
     // snapshot device a different name. It is not exposed to the caller in this
     // case.
-    auto snap_name = (linear_sectors > 0) ? name + "-inner" : name;
+    auto snap_name = (linear_sectors > 0) ? GetSnapshotExtraDeviceName(name) : name;
 
     DmTable table;
-    table.Emplace<DmTargetSnapshot>(0, snapshot_sectors, base_device, cow_dev, mode,
+    table.Emplace<DmTargetSnapshot>(0, snapshot_sectors, base_device, cow_device, mode,
                                     kSnapshotChunkSize);
     if (!dm.CreateDevice(snap_name, table, dev_path, timeout_ms)) {
         LOG(ERROR) << "Could not create snapshot device: " << snap_name;
-        images_->UnmapImageDevice(cow_name);
         return false;
     }
 
     if (linear_sectors) {
+        std::string snap_dev;
+        if (!dm.GetDeviceString(snap_name, &snap_dev)) {
+            LOG(ERROR) << "Cannot determine major/minor for: " << snap_name;
+            return false;
+        }
+
         // Our stacking will looks like this:
         //     [linear, linear] ; to snapshot, and non-snapshot region of base device
         //     [snapshot-inner]
         //     [base device]   [cow]
         DmTable table;
-        table.Emplace<DmTargetLinear>(0, snapshot_sectors, *dev_path, 0);
+        table.Emplace<DmTargetLinear>(0, snapshot_sectors, snap_dev, 0);
         table.Emplace<DmTargetLinear>(snapshot_sectors, linear_sectors, base_device,
                                       snapshot_sectors);
         if (!dm.CreateDevice(name, table, dev_path, timeout_ms)) {
             LOG(ERROR) << "Could not create outer snapshot device: " << name;
             dm.DeleteDevice(snap_name);
-            images_->UnmapImageDevice(cow_name);
             return false;
         }
     }
@@ -276,49 +410,75 @@
     return true;
 }
 
-bool SnapshotManager::UnmapSnapshot(LockedFile* lock, const std::string& name) {
-    CHECK(lock);
-    if (!EnsureImageManager()) return false;
+std::optional<std::string> SnapshotManager::MapCowImage(
+        const std::string& name, const std::chrono::milliseconds& timeout_ms) {
+    if (!EnsureImageManager()) return std::nullopt;
+    auto cow_image_name = GetCowImageDeviceName(name);
 
-    SnapshotStatus status;
-    if (!ReadSnapshotStatus(lock, name, &status)) {
-        return false;
+    bool ok;
+    std::string cow_dev;
+    if (has_local_image_manager_) {
+        // If we forced a local image manager, it means we don't have binder,
+        // which means first-stage init. We must use device-mapper.
+        const auto& opener = device_->GetPartitionOpener();
+        ok = images_->MapImageWithDeviceMapper(opener, cow_image_name, &cow_dev);
+    } else {
+        ok = images_->MapImageDevice(cow_image_name, timeout_ms, &cow_dev);
     }
 
+    if (ok) {
+        LOG(INFO) << "Mapped " << cow_image_name << " to " << cow_dev;
+        return cow_dev;
+    }
+    LOG(ERROR) << "Could not map image device: " << cow_image_name;
+    return std::nullopt;
+}
+
+bool SnapshotManager::UnmapSnapshot(LockedFile* lock, const std::string& name) {
+    CHECK(lock);
+
     auto& dm = DeviceMapper::Instance();
-    if (dm.GetState(name) != DmDeviceState::INVALID && !dm.DeleteDevice(name)) {
+    if (!dm.DeleteDeviceIfExists(name)) {
         LOG(ERROR) << "Could not delete snapshot device: " << name;
         return false;
     }
 
-    // There may be an extra device, since the kernel doesn't let us have a
-    // snapshot and linear target in the same table.
-    auto dm_name = GetSnapshotDeviceName(name, status);
-    if (name != dm_name && !dm.DeleteDevice(dm_name)) {
-        LOG(ERROR) << "Could not delete inner snapshot device: " << dm_name;
+    auto snapshot_extra_device = GetSnapshotExtraDeviceName(name);
+    if (!dm.DeleteDeviceIfExists(snapshot_extra_device)) {
+        LOG(ERROR) << "Could not delete snapshot inner device: " << snapshot_extra_device;
         return false;
     }
 
-    auto cow_name = GetCowName(name);
-    if (images_->IsImageMapped(cow_name) && !images_->UnmapImageDevice(cow_name)) {
-        return false;
-    }
     return true;
 }
 
+bool SnapshotManager::UnmapCowImage(const std::string& name) {
+    if (!EnsureImageManager()) return false;
+    return images_->UnmapImageIfExists(GetCowImageDeviceName(name));
+}
+
 bool SnapshotManager::DeleteSnapshot(LockedFile* lock, const std::string& name) {
     CHECK(lock);
+    CHECK(lock->lock_mode() == LOCK_EX);
     if (!EnsureImageManager()) return false;
 
-    auto cow_name = GetCowName(name);
-    if (!images_->BackingImageExists(cow_name)) {
+    if (!UnmapCowDevices(lock, name)) {
+        return false;
+    }
+
+    // We can't delete snapshots in recovery. The only way we'd try is it we're
+    // completing or canceling a merge in preparation for a data wipe, in which
+    // case, we don't care if the file sticks around.
+    if (device_->IsRecovery()) {
+        LOG(INFO) << "Skipping delete of snapshot " << name << " in recovery.";
         return true;
     }
-    if (images_->IsImageMapped(cow_name) && !images_->UnmapImageDevice(cow_name)) {
-        return false;
-    }
-    if (!images_->DeleteBackingImage(cow_name)) {
-        return false;
+
+    auto cow_image_name = GetCowImageDeviceName(name);
+    if (images_->BackingImageExists(cow_image_name)) {
+        if (!images_->DeleteBackingImage(cow_image_name)) {
+            return false;
+        }
     }
 
     std::string error;
@@ -339,8 +499,16 @@
         LOG(ERROR) << "Cannot begin a merge if an update has not been verified";
         return false;
     }
-    if (!device_->IsRunningSnapshot()) {
-        LOG(ERROR) << "Cannot begin a merge if the device is not booted off a snapshot";
+
+    std::string old_slot;
+    auto boot_file = GetSnapshotBootIndicatorPath();
+    if (!android::base::ReadFileToString(boot_file, &old_slot)) {
+        LOG(ERROR) << "Could not determine the previous slot; aborting merge";
+        return false;
+    }
+    auto new_slot = device_->GetSlotSuffix();
+    if (new_slot == old_slot) {
+        LOG(ERROR) << "Device cannot merge while booting off old slot " << old_slot;
         return false;
     }
 
@@ -362,6 +530,27 @@
         }
     }
 
+    auto metadata = ReadCurrentMetadata();
+    for (auto it = snapshots.begin(); it != snapshots.end();) {
+        switch (GetMetadataPartitionState(*metadata, *it)) {
+            case MetadataPartitionState::Flashed:
+                LOG(WARNING) << "Detected re-flashing for partition " << *it
+                             << ". Skip merging it.";
+                [[fallthrough]];
+            case MetadataPartitionState::None: {
+                LOG(WARNING) << "Deleting snapshot for partition " << *it;
+                if (!DeleteSnapshot(lock.get(), *it)) {
+                    LOG(WARNING) << "Cannot delete snapshot for partition " << *it
+                                 << ". Skip merging it anyways.";
+                }
+                it = snapshots.erase(it);
+            } break;
+            case MetadataPartitionState::Updated: {
+                ++it;
+            } break;
+        }
+    }
+
     // Point of no return - mark that we're starting a merge. From now on every
     // snapshot must be a merge target.
     if (!WriteUpdateState(lock.get(), UpdateState::Merging)) {
@@ -395,8 +584,9 @@
     if (!ReadSnapshotStatus(lock, name, &status)) {
         return false;
     }
-    if (status.state != "created") {
-        LOG(WARNING) << "Snapshot " << name << " has unexpected state: " << status.state;
+    if (status.state() != SnapshotState::CREATED) {
+        LOG(WARNING) << "Snapshot " << name
+                     << " has unexpected state: " << SnapshotState_Name(status.state());
     }
 
     // After this, we return true because we technically did switch to a merge
@@ -406,15 +596,15 @@
         return false;
     }
 
-    status.state = "merging";
+    status.set_state(SnapshotState::MERGING);
 
     DmTargetSnapshot::Status dm_status;
     if (!QuerySnapshotStatus(dm_name, nullptr, &dm_status)) {
         LOG(ERROR) << "Could not query merge status for snapshot: " << dm_name;
     }
-    status.sectors_allocated = dm_status.sectors_allocated;
-    status.metadata_sectors = dm_status.metadata_sectors;
-    if (!WriteSnapshotStatus(lock, name, status)) {
+    status.set_sectors_allocated(dm_status.sectors_allocated);
+    status.set_metadata_sectors(dm_status.metadata_sectors);
+    if (!WriteSnapshotStatus(lock, status)) {
         LOG(ERROR) << "Could not update status file for snapshot: " << name;
     }
     return true;
@@ -516,15 +706,22 @@
 // Note that when a merge fails, we will *always* try again to complete the
 // merge each time the device boots. There is no harm in doing so, and if
 // the problem was transient, we might manage to get a new outcome.
-UpdateState SnapshotManager::WaitForMerge() {
+UpdateState SnapshotManager::ProcessUpdateState(const std::function<void()>& callback) {
     while (true) {
         UpdateState state = CheckMergeState();
+        if (state == UpdateState::MergeFailed) {
+            AcknowledgeMergeFailure();
+        }
         if (state != UpdateState::Merging) {
             // Either there is no merge, or the merge was finished, so no need
             // to keep waiting.
             return state;
         }
 
+        if (callback) {
+            callback();
+        }
+
         // This wait is not super time sensitive, so we have a relatively
         // low polling frequency.
         std::this_thread::sleep_for(2s);
@@ -534,15 +731,16 @@
 UpdateState SnapshotManager::CheckMergeState() {
     auto lock = LockExclusive();
     if (!lock) {
-        AcknowledgeMergeFailure();
         return UpdateState::MergeFailed;
     }
 
-    auto state = CheckMergeState(lock.get());
+    UpdateState state = CheckMergeState(lock.get());
     if (state == UpdateState::MergeCompleted) {
+        // Do this inside the same lock. Failures get acknowledged without the
+        // lock, because flock() might have failed.
         AcknowledgeMergeSuccess(lock.get());
-    } else if (state == UpdateState::MergeFailed) {
-        AcknowledgeMergeFailure();
+    } else if (state == UpdateState::Cancelled) {
+        RemoveAllUpdateState(lock.get());
     }
     return state;
 }
@@ -564,10 +762,17 @@
             // run.
             break;
 
+        case UpdateState::Unverified:
+            // This is an edge case. Normally cancelled updates are detected
+            // via the merge poll below, but if we never started a merge, we
+            // need to also check here.
+            if (HandleCancelledUpdate(lock)) {
+                return UpdateState::Cancelled;
+            }
+            return state;
+
         default:
-            LOG(ERROR) << "No merge exists, cannot wait. Update state: "
-                       << static_cast<uint32_t>(state);
-            return UpdateState::None;
+            return state;
     }
 
     std::vector<std::string> snapshots;
@@ -575,6 +780,7 @@
         return UpdateState::MergeFailed;
     }
 
+    bool cancelled = false;
     bool failed = false;
     bool merging = false;
     bool needs_reboot = false;
@@ -592,6 +798,9 @@
                 break;
             case UpdateState::MergeCompleted:
                 break;
+            case UpdateState::Cancelled:
+                cancelled = true;
+                break;
             default:
                 LOG(ERROR) << "Unknown merge status: " << static_cast<uint32_t>(snapshot_state);
                 failed = true;
@@ -614,6 +823,14 @@
         WriteUpdateState(lock, UpdateState::MergeNeedsReboot);
         return UpdateState::MergeNeedsReboot;
     }
+    if (cancelled) {
+        // This is an edge case, that we handle as correctly as we sensibly can.
+        // The underlying partition has changed behind update_engine, and we've
+        // removed the snapshot as a result. The exact state of the update is
+        // undefined now, but this can only happen on an unlocked device where
+        // partitions can be flashed without wiping userdata.
+        return UpdateState::Cancelled;
+    }
     return UpdateState::MergeCompleted;
 }
 
@@ -625,17 +842,38 @@
 
     std::string dm_name = GetSnapshotDeviceName(name, snapshot_status);
 
-    // During a check, we decided the merge was complete, but we were unable to
-    // collapse the device-mapper stack and perform COW cleanup. If we haven't
-    // rebooted after this check, the device will still be a snapshot-merge
-    // target. If the have rebooted, the device will now be a linear target,
-    // and we can try cleanup again.
-    if (snapshot_status.state == "merge-complete" && !IsSnapshotDevice(dm_name)) {
-        // NB: It's okay if this fails now, we gave cleanup our best effort.
-        OnSnapshotMergeComplete(lock, name, snapshot_status);
-        return UpdateState::MergeCompleted;
+    std::unique_ptr<LpMetadata> current_metadata;
+
+    if (!IsSnapshotDevice(dm_name)) {
+        if (!current_metadata) {
+            current_metadata = ReadCurrentMetadata();
+        }
+
+        if (!current_metadata ||
+            GetMetadataPartitionState(*current_metadata, name) != MetadataPartitionState::Updated) {
+            DeleteSnapshot(lock, name);
+            return UpdateState::Cancelled;
+        }
+
+        // During a check, we decided the merge was complete, but we were unable to
+        // collapse the device-mapper stack and perform COW cleanup. If we haven't
+        // rebooted after this check, the device will still be a snapshot-merge
+        // target. If the have rebooted, the device will now be a linear target,
+        // and we can try cleanup again.
+        if (snapshot_status.state() == SnapshotState::MERGE_COMPLETED) {
+            // NB: It's okay if this fails now, we gave cleanup our best effort.
+            OnSnapshotMergeComplete(lock, name, snapshot_status);
+            return UpdateState::MergeCompleted;
+        }
+
+        LOG(ERROR) << "Expected snapshot or snapshot-merge for device: " << dm_name;
+        return UpdateState::MergeFailed;
     }
 
+    // This check is expensive so it is only enabled for debugging.
+    DCHECK((current_metadata = ReadCurrentMetadata()) &&
+           GetMetadataPartitionState(*current_metadata, name) == MetadataPartitionState::Updated);
+
     std::string target_type;
     DmTargetSnapshot::Status status;
     if (!QuerySnapshotStatus(dm_name, &target_type, &status)) {
@@ -651,7 +889,7 @@
 
     // These two values are equal when merging is complete.
     if (status.sectors_allocated != status.metadata_sectors) {
-        if (snapshot_status.state == "merge-complete") {
+        if (snapshot_status.state() == SnapshotState::MERGE_COMPLETED) {
             LOG(ERROR) << "Snapshot " << name << " is merging after being marked merge-complete.";
             return UpdateState::MergeFailed;
         }
@@ -666,8 +904,8 @@
     // This makes it simpler to reason about the next reboot: no matter what
     // part of cleanup failed, first-stage init won't try to create another
     // snapshot device for this partition.
-    snapshot_status.state = "merge-complete";
-    if (!WriteSnapshotStatus(lock, name, snapshot_status)) {
+    snapshot_status.set_state(SnapshotState::MERGE_COMPLETED);
+    if (!WriteSnapshotStatus(lock, snapshot_status)) {
         return UpdateState::MergeFailed;
     }
     if (!OnSnapshotMergeComplete(lock, name, snapshot_status)) {
@@ -676,13 +914,24 @@
     return UpdateState::MergeCompleted;
 }
 
-void SnapshotManager::AcknowledgeMergeSuccess(LockedFile* lock) {
-    if (!WriteUpdateState(lock, UpdateState::None)) {
-        // We'll try again next reboot, ad infinitum.
-        return;
+std::string SnapshotManager::GetSnapshotBootIndicatorPath() {
+    return metadata_dir_ + "/" + android::base::Basename(kBootIndicatorPath);
+}
+
+void SnapshotManager::RemoveSnapshotBootIndicator() {
+    // It's okay if this fails - first-stage init performs a deeper check after
+    // reading the indicator file, so it's not a problem if it still exists
+    // after the update completes.
+    auto boot_file = GetSnapshotBootIndicatorPath();
+    if (unlink(boot_file.c_str()) == -1 && errno != ENOENT) {
+        PLOG(ERROR) << "unlink " << boot_file;
     }
 }
 
+void SnapshotManager::AcknowledgeMergeSuccess(LockedFile* lock) {
+    RemoveAllUpdateState(lock);
+}
+
 void SnapshotManager::AcknowledgeMergeFailure() {
     // Log first, so worst case, we always have a record of why the calls below
     // were being made.
@@ -739,25 +988,16 @@
 
 bool SnapshotManager::CollapseSnapshotDevice(const std::string& name,
                                              const SnapshotStatus& status) {
-    // Ideally, we would complete the following steps to collapse the device:
-    //  (1) Rewrite the snapshot table to be identical to the base device table.
-    //  (2) Rewrite the verity table to use the "snapshot" (now linear) device.
-    //  (3) Delete the base device.
-    //
-    // This should be possible once libsnapshot understands LpMetadata. In the
-    // meantime, we implement a simpler solution: rewriting the snapshot table
-    // to be a single dm-linear segment against the base device. While not as
-    // ideal, it still lets us remove the COW device. We can remove this
-    // implementation once the new method has been tested.
     auto& dm = DeviceMapper::Instance();
     auto dm_name = GetSnapshotDeviceName(name, status);
 
+    // Verify we have a snapshot-merge device.
     DeviceMapper::TargetInfo target;
     if (!GetSingleTarget(dm_name, TableQuery::Table, &target)) {
         return false;
     }
     if (DeviceMapper::GetTargetType(target.spec) != "snapshot-merge") {
-        // This should be impossible, it was checked above.
+        // This should be impossible, it was checked earlier.
         LOG(ERROR) << "Snapshot device has invalid target type: " << dm_name;
         return false;
     }
@@ -769,10 +1009,10 @@
         return false;
     }
 
-    uint64_t num_sectors = status.snapshot_size / kSectorSize;
-    if (num_sectors * kSectorSize != status.snapshot_size) {
+    uint64_t snapshot_sectors = status.snapshot_size() / kSectorSize;
+    if (snapshot_sectors * kSectorSize != status.snapshot_size()) {
         LOG(ERROR) << "Snapshot " << name
-                   << " size is not sector aligned: " << status.snapshot_size;
+                   << " size is not sector aligned: " << status.snapshot_size();
         return false;
     }
 
@@ -786,7 +1026,7 @@
             return false;
         }
         if (outer_table.size() != 2) {
-            LOG(ERROR) << "Expected 2 dm-linear targets for tabble " << name
+            LOG(ERROR) << "Expected 2 dm-linear targets for table " << name
                        << ", got: " << outer_table.size();
             return false;
         }
@@ -798,36 +1038,146 @@
                 return false;
             }
         }
-        uint64_t sectors = outer_table[0].spec.length + outer_table[1].spec.length;
-        if (sectors != num_sectors) {
-            LOG(ERROR) << "Outer snapshot " << name << " should have " << num_sectors
-                       << ", got: " << sectors;
+        if (outer_table[0].spec.length != snapshot_sectors) {
+            LOG(ERROR) << "dm-snapshot " << name << " should have " << snapshot_sectors
+                       << " sectors, got: " << outer_table[0].spec.length;
+            return false;
+        }
+        uint64_t expected_device_sectors = status.device_size() / kSectorSize;
+        uint64_t actual_device_sectors = outer_table[0].spec.length + outer_table[1].spec.length;
+        if (expected_device_sectors != actual_device_sectors) {
+            LOG(ERROR) << "Outer device " << name << " should have " << expected_device_sectors
+                       << " sectors, got: " << actual_device_sectors;
             return false;
         }
     }
 
-    // Note: we are replacing the OUTER table here, so we do not use dm_name.
-    DmTargetLinear new_target(0, num_sectors, base_device, 0);
-    LOG(INFO) << "Replacing snapshot device " << name
-              << " table with: " << new_target.GetParameterString();
-
+    uint32_t slot = SlotNumberForSlotSuffix(device_->GetSlotSuffix());
+    // Create a DmTable that is identical to the base device.
+    CreateLogicalPartitionParams base_device_params{
+            .block_device = device_->GetSuperDevice(slot),
+            .metadata_slot = slot,
+            .partition_name = name,
+            .partition_opener = &device_->GetPartitionOpener(),
+    };
     DmTable table;
-    table.Emplace<DmTargetLinear>(new_target);
+    if (!CreateDmTable(base_device_params, &table)) {
+        LOG(ERROR) << "Could not create a DmTable for partition: " << name;
+        return false;
+    }
+
+    // Note: we are replacing the *outer* table here, so we do not use dm_name.
     if (!dm.LoadTableAndActivate(name, table)) {
         return false;
     }
 
-    if (dm_name != name) {
-        // Attempt to delete the snapshot device. Nothing should be depending on
-        // the device, and device-mapper should have flushed remaining I/O. We
-        // could in theory replace with dm-zero (or re-use the table above), but
-        // for now it's better to know why this would fail.
-        if (!dm.DeleteDevice(dm_name)) {
-            LOG(ERROR) << "Unable to delete snapshot device " << dm_name << ", COW cannot be "
-                       << "reclaimed until after reboot.";
+    // Attempt to delete the snapshot device if one still exists. Nothing
+    // should be depending on the device, and device-mapper should have
+    // flushed remaining I/O. We could in theory replace with dm-zero (or
+    // re-use the table above), but for now it's better to know why this
+    // would fail.
+    if (dm_name != name && !dm.DeleteDeviceIfExists(dm_name)) {
+        LOG(ERROR) << "Unable to delete snapshot device " << dm_name << ", COW cannot be "
+                   << "reclaimed until after reboot.";
+        return false;
+    }
+
+    // Cleanup the base device as well, since it is no longer used. This does
+    // not block cleanup.
+    auto base_name = GetBaseDeviceName(name);
+    if (!dm.DeleteDeviceIfExists(base_name)) {
+        LOG(ERROR) << "Unable to delete base device for snapshot: " << base_name;
+    }
+    return true;
+}
+
+bool SnapshotManager::HandleCancelledUpdate(LockedFile* lock) {
+    std::string old_slot;
+    auto boot_file = GetSnapshotBootIndicatorPath();
+    if (!android::base::ReadFileToString(boot_file, &old_slot)) {
+        PLOG(ERROR) << "Unable to read the snapshot indicator file: " << boot_file;
+        return false;
+    }
+    if (device_->GetSlotSuffix() != old_slot) {
+        // We're booted into the target slot, which means we just rebooted
+        // after applying the update.
+        if (!HandleCancelledUpdateOnNewSlot(lock)) {
             return false;
         }
     }
+
+    // The only way we can get here is if:
+    //  (1) The device rolled back to the previous slot.
+    //  (2) This function was called prematurely before rebooting the device.
+    //  (3) fastboot set_active was used.
+    //  (4) The device updates to the new slot but re-flashed *all* partitions
+    //      in the new slot.
+    //
+    // In any case, delete the snapshots. It may be worth using the boot_control
+    // HAL to differentiate case (2).
+    RemoveAllUpdateState(lock);
+    return true;
+}
+
+std::unique_ptr<LpMetadata> SnapshotManager::ReadCurrentMetadata() {
+    const auto& opener = device_->GetPartitionOpener();
+    uint32_t slot = SlotNumberForSlotSuffix(device_->GetSlotSuffix());
+    auto super_device = device_->GetSuperDevice(slot);
+    auto metadata = android::fs_mgr::ReadMetadata(opener, super_device, slot);
+    if (!metadata) {
+        LOG(ERROR) << "Could not read dynamic partition metadata for device: " << super_device;
+        return nullptr;
+    }
+    return metadata;
+}
+
+SnapshotManager::MetadataPartitionState SnapshotManager::GetMetadataPartitionState(
+        const LpMetadata& metadata, const std::string& name) {
+    auto partition = android::fs_mgr::FindPartition(metadata, name);
+    if (!partition) return MetadataPartitionState::None;
+    if (partition->attributes & LP_PARTITION_ATTR_UPDATED) {
+        return MetadataPartitionState::Updated;
+    }
+    return MetadataPartitionState::Flashed;
+}
+
+bool SnapshotManager::HandleCancelledUpdateOnNewSlot(LockedFile* lock) {
+    std::vector<std::string> snapshots;
+    if (!ListSnapshots(lock, &snapshots)) {
+        LOG(WARNING) << "Failed to list snapshots to determine whether device has been flashed "
+                     << "after applying an update. Assuming no snapshots.";
+        // Let HandleCancelledUpdate resets UpdateState.
+        return true;
+    }
+
+    // Attempt to detect re-flashing on each partition.
+    // - If all partitions are re-flashed, we can proceed to cancel the whole update.
+    // - If only some of the partitions are re-flashed, snapshots for re-flashed partitions are
+    //   deleted. Caller is responsible for merging the rest of the snapshots.
+    // - If none of the partitions are re-flashed, caller is responsible for merging the snapshots.
+    auto metadata = ReadCurrentMetadata();
+    if (!metadata) return false;
+    bool all_snapshot_cancelled = true;
+    for (const auto& snapshot_name : snapshots) {
+        if (GetMetadataPartitionState(*metadata, snapshot_name) ==
+            MetadataPartitionState::Updated) {
+            LOG(WARNING) << "Cannot cancel update because snapshot" << snapshot_name
+                         << " is in use.";
+            all_snapshot_cancelled = false;
+            continue;
+        }
+        // Delete snapshots for partitions that are re-flashed after the update.
+        LOG(INFO) << "Detected re-flashing of partition " << snapshot_name << ".";
+        if (!DeleteSnapshot(lock, snapshot_name)) {
+            // This is an error, but it is okay to leave the snapshot in the short term.
+            // However, if all_snapshot_cancelled == false after exiting the loop, caller may
+            // initiate merge for this unused snapshot, which is likely to fail.
+            LOG(WARNING) << "Failed to delete snapshot for re-flashed partition " << snapshot_name;
+        }
+    }
+    if (!all_snapshot_cancelled) return false;
+
+    LOG(INFO) << "All partitions are re-flashed after update, removing all update states.";
     return true;
 }
 
@@ -839,8 +1189,26 @@
     }
 
     bool ok = true;
+    bool has_mapped_cow_images = false;
     for (const auto& name : snapshots) {
-        ok &= DeleteSnapshot(lock, name);
+        if (!UnmapPartitionWithSnapshot(lock, name) || !DeleteSnapshot(lock, name)) {
+            // Remember whether or not we were able to unmap the cow image.
+            auto cow_image_device = GetCowImageDeviceName(name);
+            has_mapped_cow_images |= images_->IsImageMapped(cow_image_device);
+
+            ok = false;
+        }
+    }
+
+    if (ok || !has_mapped_cow_images) {
+        // Delete any image artifacts as a precaution, in case an update is
+        // being cancelled due to some corrupted state in an lp_metadata file.
+        // Note that we do not do this if some cow images are still mapped,
+        // since we must not remove backing storage if it's in use.
+        if (!EnsureImageManager() || !images_->RemoveAllImages()) {
+            LOG(ERROR) << "Could not remove all snapshot artifacts";
+            return false;
+        }
     }
     return ok;
 }
@@ -852,12 +1220,12 @@
         return UpdateState::None;
     }
 
-    auto file = LockShared();
-    if (!file) {
+    auto lock = LockShared();
+    if (!lock) {
         return UpdateState::None;
     }
 
-    auto state = ReadUpdateState(file.get());
+    auto state = ReadUpdateState(lock.get());
     if (progress) {
         *progress = 0.0;
         if (state == UpdateState::Merging) {
@@ -887,14 +1255,356 @@
     return true;
 }
 
-auto SnapshotManager::OpenFile(const std::string& file, int open_flags, int lock_flags)
+bool SnapshotManager::IsSnapshotManagerNeeded() {
+    return access(kBootIndicatorPath, F_OK) == 0;
+}
+
+bool SnapshotManager::NeedSnapshotsInFirstStageMount() {
+    // If we fail to read, we'll wind up using CreateLogicalPartitions, which
+    // will create devices that look like the old slot, except with extra
+    // content at the end of each device. This will confuse dm-verity, and
+    // ultimately we'll fail to boot. Why not make it a fatal error and have
+    // the reason be clearer? Because the indicator file still exists, and
+    // if this was FATAL, reverting to the old slot would be broken.
+    std::string old_slot;
+    auto boot_file = GetSnapshotBootIndicatorPath();
+    if (!android::base::ReadFileToString(boot_file, &old_slot)) {
+        PLOG(ERROR) << "Unable to read the snapshot indicator file: " << boot_file;
+        return false;
+    }
+    if (device_->GetSlotSuffix() == old_slot) {
+        LOG(INFO) << "Detected slot rollback, will not mount snapshots.";
+        return false;
+    }
+
+    // If we can't read the update state, it's unlikely anything else will
+    // succeed, so this is a fatal error. We'll eventually exhaust boot
+    // attempts and revert to the old slot.
+    auto lock = LockShared();
+    if (!lock) {
+        LOG(FATAL) << "Could not read update state to determine snapshot status";
+        return false;
+    }
+    switch (ReadUpdateState(lock.get())) {
+        case UpdateState::Unverified:
+        case UpdateState::Merging:
+        case UpdateState::MergeFailed:
+            return true;
+        default:
+            return false;
+    }
+}
+
+bool SnapshotManager::CreateLogicalAndSnapshotPartitions(const std::string& super_device) {
+    LOG(INFO) << "Creating logical partitions with snapshots as needed";
+
+    auto lock = LockExclusive();
+    if (!lock) return false;
+
+    const auto& opener = device_->GetPartitionOpener();
+    uint32_t slot = SlotNumberForSlotSuffix(device_->GetSlotSuffix());
+    auto metadata = android::fs_mgr::ReadMetadata(opener, super_device, slot);
+    if (!metadata) {
+        LOG(ERROR) << "Could not read dynamic partition metadata for device: " << super_device;
+        return false;
+    }
+
+    for (const auto& partition : metadata->partitions) {
+        if (GetPartitionGroupName(metadata->groups[partition.group_index]) == kCowGroupName) {
+            LOG(INFO) << "Skip mapping partition " << GetPartitionName(partition) << " in group "
+                      << kCowGroupName;
+            continue;
+        }
+
+        CreateLogicalPartitionParams params = {
+                .block_device = super_device,
+                .metadata = metadata.get(),
+                .partition = &partition,
+                .partition_opener = &opener,
+        };
+        std::string ignore_path;
+        if (!MapPartitionWithSnapshot(lock.get(), std::move(params), &ignore_path)) {
+            return false;
+        }
+    }
+
+    LOG(INFO) << "Created logical partitions with snapshot.";
+    return true;
+}
+
+static std::chrono::milliseconds GetRemainingTime(
+        const std::chrono::milliseconds& timeout,
+        const std::chrono::time_point<std::chrono::steady_clock>& begin) {
+    // If no timeout is specified, execute all commands without specifying any timeout.
+    if (timeout.count() == 0) return std::chrono::milliseconds(0);
+    auto passed_time = std::chrono::steady_clock::now() - begin;
+    auto remaining_time = timeout - duration_cast<std::chrono::milliseconds>(passed_time);
+    if (remaining_time.count() <= 0) {
+        LOG(ERROR) << "MapPartitionWithSnapshot has reached timeout " << timeout.count() << "ms ("
+                   << remaining_time.count() << "ms remaining)";
+        // Return min() instead of remaining_time here because 0 is treated as a special value for
+        // no timeout, where the rest of the commands will still be executed.
+        return std::chrono::milliseconds::min();
+    }
+    return remaining_time;
+}
+
+bool SnapshotManager::MapPartitionWithSnapshot(LockedFile* lock,
+                                               CreateLogicalPartitionParams params,
+                                               std::string* path) {
+    auto begin = std::chrono::steady_clock::now();
+
+    CHECK(lock);
+    path->clear();
+
+    if (params.GetPartitionName() != params.GetDeviceName()) {
+        LOG(ERROR) << "Mapping snapshot with a different name is unsupported: partition_name = "
+                   << params.GetPartitionName() << ", device_name = " << params.GetDeviceName();
+        return false;
+    }
+
+    // Fill out fields in CreateLogicalPartitionParams so that we have more information (e.g. by
+    // reading super partition metadata).
+    CreateLogicalPartitionParams::OwnedData params_owned_data;
+    if (!params.InitDefaults(&params_owned_data)) {
+        return false;
+    }
+
+    if (!params.partition->num_extents) {
+        LOG(INFO) << "Skipping zero-length logical partition: " << params.GetPartitionName();
+        return true;  // leave path empty to indicate that nothing is mapped.
+    }
+
+    // Determine if there is a live snapshot for the SnapshotStatus of the partition; i.e. if the
+    // partition still has a snapshot that needs to be mapped.  If no live snapshot or merge
+    // completed, live_snapshot_status is set to nullopt.
+    std::optional<SnapshotStatus> live_snapshot_status;
+    do {
+        if (!(params.partition->attributes & LP_PARTITION_ATTR_UPDATED)) {
+            LOG(INFO) << "Detected re-flashing of partition, will skip snapshot: "
+                      << params.GetPartitionName();
+            break;
+        }
+        auto file_path = GetSnapshotStatusFilePath(params.GetPartitionName());
+        if (access(file_path.c_str(), F_OK) != 0) {
+            if (errno != ENOENT) {
+                PLOG(INFO) << "Can't map snapshot for " << params.GetPartitionName()
+                           << ": Can't access " << file_path;
+                return false;
+            }
+            break;
+        }
+        live_snapshot_status = std::make_optional<SnapshotStatus>();
+        if (!ReadSnapshotStatus(lock, params.GetPartitionName(), &*live_snapshot_status)) {
+            return false;
+        }
+        // No live snapshot if merge is completed.
+        if (live_snapshot_status->state() == SnapshotState::MERGE_COMPLETED) {
+            live_snapshot_status.reset();
+        }
+
+        if (live_snapshot_status->state() == SnapshotState::NONE ||
+            live_snapshot_status->cow_partition_size() + live_snapshot_status->cow_file_size() ==
+                    0) {
+            LOG(WARNING) << "Snapshot status for " << params.GetPartitionName()
+                         << " is invalid, ignoring: state = "
+                         << SnapshotState_Name(live_snapshot_status->state())
+                         << ", cow_partition_size = " << live_snapshot_status->cow_partition_size()
+                         << ", cow_file_size = " << live_snapshot_status->cow_file_size();
+            live_snapshot_status.reset();
+        }
+    } while (0);
+
+    if (live_snapshot_status.has_value()) {
+        // dm-snapshot requires the base device to be writable.
+        params.force_writable = true;
+        // Map the base device with a different name to avoid collision.
+        params.device_name = GetBaseDeviceName(params.GetPartitionName());
+    }
+
+    AutoDeviceList created_devices;
+
+    // Create the base device for the snapshot, or if there is no snapshot, the
+    // device itself. This device consists of the real blocks in the super
+    // partition that this logical partition occupies.
+    auto& dm = DeviceMapper::Instance();
+    std::string base_path;
+    if (!CreateLogicalPartition(params, &base_path)) {
+        LOG(ERROR) << "Could not create logical partition " << params.GetPartitionName()
+                   << " as device " << params.GetDeviceName();
+        return false;
+    }
+    created_devices.EmplaceBack<AutoUnmapDevice>(&dm, params.GetDeviceName());
+
+    if (!live_snapshot_status.has_value()) {
+        *path = base_path;
+        created_devices.Release();
+        return true;
+    }
+
+    // We don't have ueventd in first-stage init, so use device major:minor
+    // strings instead.
+    std::string base_device;
+    if (!dm.GetDeviceString(params.GetDeviceName(), &base_device)) {
+        LOG(ERROR) << "Could not determine major/minor for: " << params.GetDeviceName();
+        return false;
+    }
+
+    auto remaining_time = GetRemainingTime(params.timeout_ms, begin);
+    if (remaining_time.count() < 0) return false;
+
+    std::string cow_name;
+    CreateLogicalPartitionParams cow_params = params;
+    cow_params.timeout_ms = remaining_time;
+    if (!MapCowDevices(lock, cow_params, *live_snapshot_status, &created_devices, &cow_name)) {
+        return false;
+    }
+    std::string cow_device;
+    if (!dm.GetDeviceString(cow_name, &cow_device)) {
+        LOG(ERROR) << "Could not determine major/minor for: " << cow_name;
+        return false;
+    }
+
+    remaining_time = GetRemainingTime(params.timeout_ms, begin);
+    if (remaining_time.count() < 0) return false;
+
+    if (!MapSnapshot(lock, params.GetPartitionName(), base_device, cow_device, remaining_time,
+                     path)) {
+        LOG(ERROR) << "Could not map snapshot for partition: " << params.GetPartitionName();
+        return false;
+    }
+    // No need to add params.GetPartitionName() to created_devices since it is immediately released.
+
+    created_devices.Release();
+
+    LOG(INFO) << "Mapped " << params.GetPartitionName() << " as snapshot device at " << *path;
+
+    return true;
+}
+
+bool SnapshotManager::UnmapPartitionWithSnapshot(LockedFile* lock,
+                                                 const std::string& target_partition_name) {
+    CHECK(lock);
+
+    if (!UnmapSnapshot(lock, target_partition_name)) {
+        return false;
+    }
+
+    if (!UnmapCowDevices(lock, target_partition_name)) {
+        return false;
+    }
+
+    auto& dm = DeviceMapper::Instance();
+    std::string base_name = GetBaseDeviceName(target_partition_name);
+    if (!dm.DeleteDeviceIfExists(base_name)) {
+        LOG(ERROR) << "Cannot delete base device: " << base_name;
+        return false;
+    }
+
+    LOG(INFO) << "Successfully unmapped snapshot " << target_partition_name;
+
+    return true;
+}
+
+bool SnapshotManager::MapCowDevices(LockedFile* lock, const CreateLogicalPartitionParams& params,
+                                    const SnapshotStatus& snapshot_status,
+                                    AutoDeviceList* created_devices, std::string* cow_name) {
+    CHECK(lock);
+    CHECK(snapshot_status.cow_partition_size() + snapshot_status.cow_file_size() > 0);
+    auto begin = std::chrono::steady_clock::now();
+
+    std::string partition_name = params.GetPartitionName();
+    std::string cow_image_name = GetCowImageDeviceName(partition_name);
+    *cow_name = GetCowName(partition_name);
+
+    auto& dm = DeviceMapper::Instance();
+
+    // Map COW image if necessary.
+    if (snapshot_status.cow_file_size() > 0) {
+        if (!EnsureImageManager()) return false;
+        auto remaining_time = GetRemainingTime(params.timeout_ms, begin);
+        if (remaining_time.count() < 0) return false;
+
+        if (!MapCowImage(partition_name, remaining_time).has_value()) {
+            LOG(ERROR) << "Could not map cow image for partition: " << partition_name;
+            return false;
+        }
+        created_devices->EmplaceBack<AutoUnmapImage>(images_.get(), cow_image_name);
+
+        // If no COW partition exists, just return the image alone.
+        if (snapshot_status.cow_partition_size() == 0) {
+            *cow_name = std::move(cow_image_name);
+            LOG(INFO) << "Mapped COW image for " << partition_name << " at " << *cow_name;
+            return true;
+        }
+    }
+
+    auto remaining_time = GetRemainingTime(params.timeout_ms, begin);
+    if (remaining_time.count() < 0) return false;
+
+    CHECK(snapshot_status.cow_partition_size() > 0);
+
+    // Create the DmTable for the COW device. It is the DmTable of the COW partition plus
+    // COW image device as the last extent.
+    CreateLogicalPartitionParams cow_partition_params = params;
+    cow_partition_params.partition = nullptr;
+    cow_partition_params.partition_name = *cow_name;
+    cow_partition_params.device_name.clear();
+    DmTable table;
+    if (!CreateDmTable(cow_partition_params, &table)) {
+        return false;
+    }
+    // If the COW image exists, append it as the last extent.
+    if (snapshot_status.cow_file_size() > 0) {
+        std::string cow_image_device;
+        if (!dm.GetDeviceString(cow_image_name, &cow_image_device)) {
+            LOG(ERROR) << "Cannot determine major/minor for: " << cow_image_name;
+            return false;
+        }
+        auto cow_partition_sectors = snapshot_status.cow_partition_size() / kSectorSize;
+        auto cow_image_sectors = snapshot_status.cow_file_size() / kSectorSize;
+        table.Emplace<DmTargetLinear>(cow_partition_sectors, cow_image_sectors, cow_image_device,
+                                      0);
+    }
+
+    // We have created the DmTable now. Map it.
+    std::string cow_path;
+    if (!dm.CreateDevice(*cow_name, table, &cow_path, remaining_time)) {
+        LOG(ERROR) << "Could not create COW device: " << *cow_name;
+        return false;
+    }
+    created_devices->EmplaceBack<AutoUnmapDevice>(&dm, *cow_name);
+    LOG(INFO) << "Mapped COW device for " << params.GetPartitionName() << " at " << cow_path;
+    return true;
+}
+
+bool SnapshotManager::UnmapCowDevices(LockedFile* lock, const std::string& name) {
+    CHECK(lock);
+    if (!EnsureImageManager()) return false;
+
+    auto& dm = DeviceMapper::Instance();
+    auto cow_name = GetCowName(name);
+    if (!dm.DeleteDeviceIfExists(cow_name)) {
+        LOG(ERROR) << "Cannot unmap " << cow_name;
+        return false;
+    }
+
+    std::string cow_image_name = GetCowImageDeviceName(name);
+    if (!images_->UnmapImageIfExists(cow_image_name)) {
+        LOG(ERROR) << "Cannot unmap image " << cow_image_name;
+        return false;
+    }
+    return true;
+}
+
+auto SnapshotManager::OpenFile(const std::string& file, int lock_flags)
         -> std::unique_ptr<LockedFile> {
-    unique_fd fd(open(file.c_str(), open_flags | O_CLOEXEC | O_NOFOLLOW | O_SYNC, 0660));
+    unique_fd fd(open(file.c_str(), O_RDONLY | O_CLOEXEC | O_NOFOLLOW));
     if (fd < 0) {
         PLOG(ERROR) << "Open failed: " << file;
         return nullptr;
     }
-    if (flock(fd, lock_flags) < 0) {
+    if (lock_flags != 0 && flock(fd, lock_flags) < 0) {
         PLOG(ERROR) << "Acquire flock failed: " << file;
         return nullptr;
     }
@@ -914,29 +1624,28 @@
     return metadata_dir_ + "/state"s;
 }
 
-std::unique_ptr<SnapshotManager::LockedFile> SnapshotManager::OpenStateFile(int open_flags,
-                                                                            int lock_flags) {
-    auto state_file = GetStateFilePath();
-    return OpenFile(state_file, open_flags, lock_flags);
+std::string SnapshotManager::GetLockPath() const {
+    return metadata_dir_;
+}
+
+std::unique_ptr<SnapshotManager::LockedFile> SnapshotManager::OpenLock(int lock_flags) {
+    auto lock_file = GetLockPath();
+    return OpenFile(lock_file, lock_flags);
 }
 
 std::unique_ptr<SnapshotManager::LockedFile> SnapshotManager::LockShared() {
-    return OpenStateFile(O_RDONLY, LOCK_SH);
+    return OpenLock(LOCK_SH);
 }
 
 std::unique_ptr<SnapshotManager::LockedFile> SnapshotManager::LockExclusive() {
-    return OpenStateFile(O_RDWR | O_CREAT, LOCK_EX);
+    return OpenLock(LOCK_EX);
 }
 
-UpdateState SnapshotManager::ReadUpdateState(LockedFile* file) {
-    // Reset position since some calls read+write.
-    if (lseek(file->fd(), 0, SEEK_SET) < 0) {
-        PLOG(ERROR) << "lseek state file failed";
-        return UpdateState::None;
-    }
+UpdateState SnapshotManager::ReadUpdateState(LockedFile* lock) {
+    CHECK(lock);
 
     std::string contents;
-    if (!android::base::ReadFdToString(file->fd(), &contents)) {
+    if (!android::base::ReadFileToString(GetStateFilePath(), &contents)) {
         PLOG(ERROR) << "Read state file failed";
         return UpdateState::None;
     }
@@ -961,40 +1670,79 @@
     }
 }
 
-bool SnapshotManager::WriteUpdateState(LockedFile* file, UpdateState state) {
-    std::string contents;
+std::ostream& operator<<(std::ostream& os, UpdateState state) {
     switch (state) {
         case UpdateState::None:
-            contents = "none";
-            break;
+            return os << "none";
         case UpdateState::Initiated:
-            contents = "initiated";
-            break;
+            return os << "initiated";
         case UpdateState::Unverified:
-            contents = "unverified";
-            break;
+            return os << "unverified";
         case UpdateState::Merging:
-            contents = "merging";
-            break;
+            return os << "merging";
         case UpdateState::MergeCompleted:
-            contents = "merge-completed";
-            break;
+            return os << "merge-completed";
         case UpdateState::MergeNeedsReboot:
-            contents = "merge-needs-reboot";
-            break;
+            return os << "merge-needs-reboot";
         case UpdateState::MergeFailed:
-            contents = "merge-failed";
-            break;
+            return os << "merge-failed";
         default:
             LOG(ERROR) << "Unknown update state";
-            return false;
+            return os;
+    }
+}
+
+bool SnapshotManager::WriteUpdateState(LockedFile* lock, UpdateState state) {
+    CHECK(lock);
+    CHECK(lock->lock_mode() == LOCK_EX);
+
+    std::stringstream ss;
+    ss << state;
+    std::string contents = ss.str();
+    if (contents.empty()) return false;
+
+#ifdef LIBSNAPSHOT_USE_HAL
+    auto merge_status = MergeStatus::UNKNOWN;
+    switch (state) {
+        // The needs-reboot and completed cases imply that /data and /metadata
+        // can be safely wiped, so we don't report a merge status.
+        case UpdateState::None:
+        case UpdateState::MergeNeedsReboot:
+        case UpdateState::MergeCompleted:
+        case UpdateState::Initiated:
+            merge_status = MergeStatus::NONE;
+            break;
+        case UpdateState::Unverified:
+            merge_status = MergeStatus::SNAPSHOTTED;
+            break;
+        case UpdateState::Merging:
+        case UpdateState::MergeFailed:
+            merge_status = MergeStatus::MERGING;
+            break;
+        default:
+            // Note that Cancelled flows to here - it is never written, since
+            // it only communicates a transient state to the caller.
+            LOG(ERROR) << "Unexpected update status: " << state;
+            break;
     }
 
-    if (!Truncate(file)) return false;
-    if (!android::base::WriteStringToFd(contents, file->fd())) {
+    bool set_before_write =
+            merge_status == MergeStatus::SNAPSHOTTED || merge_status == MergeStatus::MERGING;
+    if (set_before_write && !device_->SetBootControlMergeStatus(merge_status)) {
+        return false;
+    }
+#endif
+
+    if (!WriteStringToFileAtomic(contents, GetStateFilePath())) {
         PLOG(ERROR) << "Could not write to state file";
         return false;
     }
+
+#ifdef LIBSNAPSHOT_USE_HAL
+    if (!set_before_write && !device_->SetBootControlMergeStatus(merge_status)) {
+        return false;
+    }
+#endif
     return true;
 }
 
@@ -1014,82 +1762,45 @@
         return false;
     }
 
-    std::string contents;
-    if (!android::base::ReadFdToString(fd, &contents)) {
-        PLOG(ERROR) << "read failed: " << path;
-        return false;
-    }
-    auto pieces = android::base::Split(contents, " ");
-    if (pieces.size() != 5) {
-        LOG(ERROR) << "Invalid status line for snapshot: " << path;
+    if (!status->ParseFromFileDescriptor(fd.get())) {
+        PLOG(ERROR) << "Unable to parse " << path << " as SnapshotStatus";
         return false;
     }
 
-    status->state = pieces[0];
-    if (!android::base::ParseUint(pieces[1], &status->device_size)) {
-        LOG(ERROR) << "Invalid device size in status line for: " << path;
-        return false;
+    if (status->name() != name) {
+        LOG(WARNING) << "Found snapshot status named " << status->name() << " in " << path;
+        status->set_name(name);
     }
-    if (!android::base::ParseUint(pieces[2], &status->snapshot_size)) {
-        LOG(ERROR) << "Invalid snapshot size in status line for: " << path;
-        return false;
-    }
-    if (!android::base::ParseUint(pieces[3], &status->sectors_allocated)) {
-        LOG(ERROR) << "Invalid snapshot size in status line for: " << path;
-        return false;
-    }
-    if (!android::base::ParseUint(pieces[4], &status->metadata_sectors)) {
-        LOG(ERROR) << "Invalid snapshot size in status line for: " << path;
-        return false;
-    }
+
     return true;
 }
 
-bool SnapshotManager::WriteSnapshotStatus(LockedFile* lock, const std::string& name,
-                                          const SnapshotStatus& status) {
+bool SnapshotManager::WriteSnapshotStatus(LockedFile* lock, const SnapshotStatus& status) {
     // The caller must take an exclusive lock to modify snapshots.
     CHECK(lock);
     CHECK(lock->lock_mode() == LOCK_EX);
+    CHECK(!status.name().empty());
 
-    auto path = GetSnapshotStatusFilePath(name);
-    unique_fd fd(open(path.c_str(), O_RDWR | O_CLOEXEC | O_NOFOLLOW | O_CREAT | O_SYNC, 0660));
-    if (fd < 0) {
-        PLOG(ERROR) << "Open failed: " << path;
+    auto path = GetSnapshotStatusFilePath(status.name());
+
+    std::string content;
+    if (!status.SerializeToString(&content)) {
+        LOG(ERROR) << "Unable to serialize SnapshotStatus for " << status.name();
         return false;
     }
 
-    std::vector<std::string> pieces = {
-            status.state,
-            std::to_string(status.device_size),
-            std::to_string(status.snapshot_size),
-            std::to_string(status.sectors_allocated),
-            std::to_string(status.metadata_sectors),
-    };
-    auto contents = android::base::Join(pieces, " ");
+    if (!WriteStringToFileAtomic(content, path)) {
+        PLOG(ERROR) << "Unable to write SnapshotStatus to " << path;
+        return false;
+    }
 
-    if (!android::base::WriteStringToFd(contents, fd)) {
-        PLOG(ERROR) << "write failed: " << path;
-        return false;
-    }
-    return true;
-}
-
-bool SnapshotManager::Truncate(LockedFile* file) {
-    if (lseek(file->fd(), 0, SEEK_SET) < 0) {
-        PLOG(ERROR) << "lseek file failed: " << file->path();
-        return false;
-    }
-    if (ftruncate(file->fd(), 0) < 0) {
-        PLOG(ERROR) << "truncate failed: " << file->path();
-        return false;
-    }
     return true;
 }
 
 std::string SnapshotManager::GetSnapshotDeviceName(const std::string& snapshot_name,
                                                    const SnapshotStatus& status) {
-    if (status.device_size != status.snapshot_size) {
-        return snapshot_name + "-inner";
+    if (status.device_size() != status.snapshot_size()) {
+        return GetSnapshotExtraDeviceName(snapshot_name);
     }
     return snapshot_name;
 }
@@ -1106,5 +1817,491 @@
     return true;
 }
 
+bool SnapshotManager::ForceLocalImageManager() {
+    images_ = android::fiemap::ImageManager::Open(gsid_dir_);
+    if (!images_) {
+        LOG(ERROR) << "Could not open ImageManager";
+        return false;
+    }
+    has_local_image_manager_ = true;
+    return true;
+}
+
+static void UnmapAndDeleteCowPartition(MetadataBuilder* current_metadata) {
+    auto& dm = DeviceMapper::Instance();
+    std::vector<std::string> to_delete;
+    for (auto* existing_cow_partition : current_metadata->ListPartitionsInGroup(kCowGroupName)) {
+        if (!dm.DeleteDeviceIfExists(existing_cow_partition->name())) {
+            LOG(WARNING) << existing_cow_partition->name()
+                         << " cannot be unmapped and its space cannot be reclaimed";
+            continue;
+        }
+        to_delete.push_back(existing_cow_partition->name());
+    }
+    for (const auto& name : to_delete) {
+        current_metadata->RemovePartition(name);
+    }
+}
+
+bool SnapshotManager::CreateUpdateSnapshots(const DeltaArchiveManifest& manifest) {
+    auto lock = LockExclusive();
+    if (!lock) return false;
+
+    // TODO(b/134949511): remove this check. Right now, with overlayfs mounted, the scratch
+    // partition takes up a big chunk of space in super, causing COW images to be created on
+    // retrofit Virtual A/B devices.
+    if (device_->IsOverlayfsSetup()) {
+        LOG(ERROR) << "Cannot create update snapshots with overlayfs setup. Run `adb enable-verity`"
+                   << ", reboot, then try again.";
+        return false;
+    }
+
+    const auto& opener = device_->GetPartitionOpener();
+    auto current_suffix = device_->GetSlotSuffix();
+    uint32_t current_slot = SlotNumberForSlotSuffix(current_suffix);
+    auto target_suffix = device_->GetOtherSlotSuffix();
+    uint32_t target_slot = SlotNumberForSlotSuffix(target_suffix);
+    auto current_super = device_->GetSuperDevice(current_slot);
+
+    auto current_metadata = MetadataBuilder::New(opener, current_super, current_slot);
+    auto target_metadata =
+            MetadataBuilder::NewForUpdate(opener, current_super, current_slot, target_slot);
+
+    // Delete partitions with target suffix in |current_metadata|. Otherwise,
+    // partition_cow_creator recognizes these left-over partitions as used space.
+    for (const auto& group_name : current_metadata->ListGroups()) {
+        if (android::base::EndsWith(group_name, target_suffix)) {
+            current_metadata->RemoveGroupAndPartitions(group_name);
+        }
+    }
+
+    SnapshotMetadataUpdater metadata_updater(target_metadata.get(), target_slot, manifest);
+    if (!metadata_updater.Update()) {
+        LOG(ERROR) << "Cannot calculate new metadata.";
+        return false;
+    }
+
+    // Delete previous COW partitions in current_metadata so that PartitionCowCreator marks those as
+    // free regions.
+    UnmapAndDeleteCowPartition(current_metadata.get());
+
+    // Check that all these metadata is not retrofit dynamic partitions. Snapshots on
+    // devices with retrofit dynamic partitions does not make sense.
+    // This ensures that current_metadata->GetFreeRegions() uses the same device
+    // indices as target_metadata (i.e. 0 -> "super").
+    // This is also assumed in MapCowDevices() call below.
+    CHECK(current_metadata->GetBlockDevicePartitionName(0) == LP_METADATA_DEFAULT_PARTITION_NAME &&
+          target_metadata->GetBlockDevicePartitionName(0) == LP_METADATA_DEFAULT_PARTITION_NAME);
+
+    std::map<std::string, SnapshotStatus> all_snapshot_status;
+
+    // In case of error, automatically delete devices that are created along the way.
+    // Note that "lock" is destroyed after "created_devices", so it is safe to use |lock| for
+    // these devices.
+    AutoDeviceList created_devices;
+
+    PartitionCowCreator cow_creator{
+            .target_metadata = target_metadata.get(),
+            .target_suffix = target_suffix,
+            .target_partition = nullptr,
+            .current_metadata = current_metadata.get(),
+            .current_suffix = current_suffix,
+            .operations = nullptr,
+            .extra_extents = {},
+    };
+
+    if (!CreateUpdateSnapshotsInternal(lock.get(), manifest, &cow_creator, &created_devices,
+                                       &all_snapshot_status)) {
+        return false;
+    }
+
+    auto exported_target_metadata = target_metadata->Export();
+    if (exported_target_metadata == nullptr) {
+        LOG(ERROR) << "Cannot export target metadata";
+        return false;
+    }
+
+    if (!InitializeUpdateSnapshots(lock.get(), target_metadata.get(),
+                                   exported_target_metadata.get(), target_suffix,
+                                   all_snapshot_status)) {
+        return false;
+    }
+
+    if (!UpdatePartitionTable(opener, device_->GetSuperDevice(target_slot),
+                              *exported_target_metadata, target_slot)) {
+        LOG(ERROR) << "Cannot write target metadata";
+        return false;
+    }
+
+    created_devices.Release();
+    LOG(INFO) << "Successfully created all snapshots for target slot " << target_suffix;
+
+    return true;
+}
+
+bool SnapshotManager::CreateUpdateSnapshotsInternal(
+        LockedFile* lock, const DeltaArchiveManifest& manifest, PartitionCowCreator* cow_creator,
+        AutoDeviceList* created_devices,
+        std::map<std::string, SnapshotStatus>* all_snapshot_status) {
+    CHECK(lock);
+
+    auto* target_metadata = cow_creator->target_metadata;
+    const auto& target_suffix = cow_creator->target_suffix;
+
+    if (!target_metadata->AddGroup(kCowGroupName, 0)) {
+        LOG(ERROR) << "Cannot add group " << kCowGroupName;
+        return false;
+    }
+
+    std::map<std::string, const RepeatedPtrField<InstallOperation>*> install_operation_map;
+    std::map<std::string, std::vector<Extent>> extra_extents_map;
+    for (const auto& partition_update : manifest.partitions()) {
+        auto suffixed_name = partition_update.partition_name() + target_suffix;
+        auto&& [it, inserted] =
+                install_operation_map.emplace(suffixed_name, &partition_update.operations());
+        if (!inserted) {
+            LOG(ERROR) << "Duplicated partition " << partition_update.partition_name()
+                       << " in update manifest.";
+            return false;
+        }
+
+        auto& extra_extents = extra_extents_map[suffixed_name];
+        if (partition_update.has_hash_tree_extent()) {
+            extra_extents.push_back(partition_update.hash_tree_extent());
+        }
+        if (partition_update.has_fec_extent()) {
+            extra_extents.push_back(partition_update.fec_extent());
+        }
+    }
+
+    for (auto* target_partition : ListPartitionsWithSuffix(target_metadata, target_suffix)) {
+        cow_creator->target_partition = target_partition;
+        cow_creator->operations = nullptr;
+        auto operations_it = install_operation_map.find(target_partition->name());
+        if (operations_it != install_operation_map.end()) {
+            cow_creator->operations = operations_it->second;
+        }
+
+        cow_creator->extra_extents.clear();
+        auto extra_extents_it = extra_extents_map.find(target_partition->name());
+        if (extra_extents_it != extra_extents_map.end()) {
+            cow_creator->extra_extents = std::move(extra_extents_it->second);
+        }
+
+        // Compute the device sizes for the partition.
+        auto cow_creator_ret = cow_creator->Run();
+        if (!cow_creator_ret.has_value()) {
+            return false;
+        }
+
+        LOG(INFO) << "For partition " << target_partition->name()
+                  << ", device size = " << cow_creator_ret->snapshot_status.device_size()
+                  << ", snapshot size = " << cow_creator_ret->snapshot_status.snapshot_size()
+                  << ", cow partition size = "
+                  << cow_creator_ret->snapshot_status.cow_partition_size()
+                  << ", cow file size = " << cow_creator_ret->snapshot_status.cow_file_size();
+
+        // Delete any existing snapshot before re-creating one.
+        if (!DeleteSnapshot(lock, target_partition->name())) {
+            LOG(ERROR) << "Cannot delete existing snapshot before creating a new one for partition "
+                       << target_partition->name();
+            return false;
+        }
+
+        // It is possible that the whole partition uses free space in super, and snapshot / COW
+        // would not be needed. In this case, skip the partition.
+        bool needs_snapshot = cow_creator_ret->snapshot_status.snapshot_size() > 0;
+        bool needs_cow = (cow_creator_ret->snapshot_status.cow_partition_size() +
+                          cow_creator_ret->snapshot_status.cow_file_size()) > 0;
+        CHECK(needs_snapshot == needs_cow);
+
+        if (!needs_snapshot) {
+            LOG(INFO) << "Skip creating snapshot for partition " << target_partition->name()
+                      << "because nothing needs to be snapshotted.";
+            continue;
+        }
+
+        // Store these device sizes to snapshot status file.
+        if (!CreateSnapshot(lock, &cow_creator_ret->snapshot_status)) {
+            return false;
+        }
+        created_devices->EmplaceBack<AutoDeleteSnapshot>(this, lock, target_partition->name());
+
+        // Create the COW partition. That is, use any remaining free space in super partition before
+        // creating the COW images.
+        if (cow_creator_ret->snapshot_status.cow_partition_size() > 0) {
+            CHECK(cow_creator_ret->snapshot_status.cow_partition_size() % kSectorSize == 0)
+                    << "cow_partition_size == "
+                    << cow_creator_ret->snapshot_status.cow_partition_size()
+                    << " is not a multiple of sector size " << kSectorSize;
+            auto cow_partition = target_metadata->AddPartition(GetCowName(target_partition->name()),
+                                                               kCowGroupName, 0 /* flags */);
+            if (cow_partition == nullptr) {
+                return false;
+            }
+
+            if (!target_metadata->ResizePartition(
+                        cow_partition, cow_creator_ret->snapshot_status.cow_partition_size(),
+                        cow_creator_ret->cow_partition_usable_regions)) {
+                LOG(ERROR) << "Cannot create COW partition on metadata with size "
+                           << cow_creator_ret->snapshot_status.cow_partition_size();
+                return false;
+            }
+            // Only the in-memory target_metadata is modified; nothing to clean up if there is an
+            // error in the future.
+        }
+
+        // Create the backing COW image if necessary.
+        if (cow_creator_ret->snapshot_status.cow_file_size() > 0) {
+            if (!CreateCowImage(lock, target_partition->name())) {
+                return false;
+            }
+        }
+
+        all_snapshot_status->emplace(target_partition->name(),
+                                     std::move(cow_creator_ret->snapshot_status));
+
+        LOG(INFO) << "Successfully created snapshot for " << target_partition->name();
+    }
+    return true;
+}
+
+bool SnapshotManager::InitializeUpdateSnapshots(
+        LockedFile* lock, MetadataBuilder* target_metadata,
+        const LpMetadata* exported_target_metadata, const std::string& target_suffix,
+        const std::map<std::string, SnapshotStatus>& all_snapshot_status) {
+    CHECK(lock);
+
+    auto& dm = DeviceMapper::Instance();
+    CreateLogicalPartitionParams cow_params{
+            .block_device = LP_METADATA_DEFAULT_PARTITION_NAME,
+            .metadata = exported_target_metadata,
+            .timeout_ms = std::chrono::milliseconds::max(),
+            .partition_opener = &device_->GetPartitionOpener(),
+    };
+    for (auto* target_partition : ListPartitionsWithSuffix(target_metadata, target_suffix)) {
+        AutoDeviceList created_devices_for_cow;
+
+        if (!UnmapPartitionWithSnapshot(lock, target_partition->name())) {
+            LOG(ERROR) << "Cannot unmap existing COW devices before re-mapping them for zero-fill: "
+                       << target_partition->name();
+            return false;
+        }
+
+        auto it = all_snapshot_status.find(target_partition->name());
+        if (it == all_snapshot_status.end()) continue;
+        cow_params.partition_name = target_partition->name();
+        std::string cow_name;
+        if (!MapCowDevices(lock, cow_params, it->second, &created_devices_for_cow, &cow_name)) {
+            return false;
+        }
+
+        std::string cow_path;
+        if (!dm.GetDmDevicePathByName(cow_name, &cow_path)) {
+            LOG(ERROR) << "Cannot determine path for " << cow_name;
+            return false;
+        }
+
+        if (!InitializeCow(cow_path)) {
+            LOG(ERROR) << "Can't zero-fill COW device for " << target_partition->name() << ": "
+                       << cow_path;
+            return false;
+        }
+        // Let destructor of created_devices_for_cow to unmap the COW devices.
+    };
+    return true;
+}
+
+bool SnapshotManager::MapUpdateSnapshot(const CreateLogicalPartitionParams& params,
+                                        std::string* snapshot_path) {
+    auto lock = LockShared();
+    if (!lock) return false;
+    if (!UnmapPartitionWithSnapshot(lock.get(), params.GetPartitionName())) {
+        LOG(ERROR) << "Cannot unmap existing snapshot before re-mapping it: "
+                   << params.GetPartitionName();
+        return false;
+    }
+    return MapPartitionWithSnapshot(lock.get(), params, snapshot_path);
+}
+
+bool SnapshotManager::UnmapUpdateSnapshot(const std::string& target_partition_name) {
+    auto lock = LockShared();
+    if (!lock) return false;
+    return UnmapPartitionWithSnapshot(lock.get(), target_partition_name);
+}
+
+bool SnapshotManager::UnmapAllPartitions() {
+    auto lock = LockExclusive();
+    if (!lock) return false;
+
+    const auto& opener = device_->GetPartitionOpener();
+    uint32_t slot = SlotNumberForSlotSuffix(device_->GetSlotSuffix());
+    auto super_device = device_->GetSuperDevice(slot);
+    auto metadata = android::fs_mgr::ReadMetadata(opener, super_device, slot);
+    if (!metadata) {
+        LOG(ERROR) << "Could not read dynamic partition metadata for device: " << super_device;
+        return false;
+    }
+
+    bool ok = true;
+    for (const auto& partition : metadata->partitions) {
+        auto partition_name = GetPartitionName(partition);
+        ok &= UnmapPartitionWithSnapshot(lock.get(), partition_name);
+    }
+    return ok;
+}
+
+bool SnapshotManager::Dump(std::ostream& os) {
+    // Don't actually lock. Dump() is for debugging purposes only, so it is okay
+    // if it is racy.
+    auto file = OpenLock(0 /* lock flag */);
+    if (!file) return false;
+
+    std::stringstream ss;
+
+    ss << "Update state: " << ReadUpdateState(file.get()) << std::endl;
+
+    auto boot_file = GetSnapshotBootIndicatorPath();
+    std::string boot_indicator;
+    if (android::base::ReadFileToString(boot_file, &boot_indicator)) {
+        ss << "Boot indicator: old slot = " << boot_indicator << std::endl;
+    }
+
+    bool ok = true;
+    std::vector<std::string> snapshots;
+    if (!ListSnapshots(file.get(), &snapshots)) {
+        LOG(ERROR) << "Could not list snapshots";
+        snapshots.clear();
+        ok = false;
+    }
+    for (const auto& name : snapshots) {
+        ss << "Snapshot: " << name << std::endl;
+        SnapshotStatus status;
+        if (!ReadSnapshotStatus(file.get(), name, &status)) {
+            ok = false;
+            continue;
+        }
+        ss << "    state: " << SnapshotState_Name(status.state()) << std::endl;
+        ss << "    device size (bytes): " << status.device_size() << std::endl;
+        ss << "    snapshot size (bytes): " << status.snapshot_size() << std::endl;
+        ss << "    cow partition size (bytes): " << status.cow_partition_size() << std::endl;
+        ss << "    cow file size (bytes): " << status.cow_file_size() << std::endl;
+        ss << "    allocated sectors: " << status.sectors_allocated() << std::endl;
+        ss << "    metadata sectors: " << status.metadata_sectors() << std::endl;
+    }
+    os << ss.rdbuf();
+    return ok;
+}
+
+std::unique_ptr<AutoDevice> SnapshotManager::EnsureMetadataMounted() {
+    if (!device_->IsRecovery()) {
+        // No need to mount anything in recovery.
+        LOG(INFO) << "EnsureMetadataMounted does nothing in Android mode.";
+        return std::unique_ptr<AutoUnmountDevice>(new AutoUnmountDevice());
+    }
+    return AutoUnmountDevice::New(device_->GetMetadataDir());
+}
+
+UpdateState SnapshotManager::InitiateMergeAndWait() {
+    {
+        auto lock = LockExclusive();
+        // Sync update state from file with bootloader.
+        if (!WriteUpdateState(lock.get(), ReadUpdateState(lock.get()))) {
+            LOG(WARNING) << "Unable to sync write update state, fastboot may "
+                         << "reject / accept wipes incorrectly!";
+        }
+    }
+
+    LOG(INFO) << "Waiting for any previous merge request to complete. "
+              << "This can take up to several minutes.";
+    auto state = ProcessUpdateState();
+    if (state == UpdateState::None) {
+        LOG(INFO) << "Can't find any snapshot to merge.";
+        return state;
+    }
+    if (state == UpdateState::Unverified) {
+        if (!InitiateMerge()) {
+            LOG(ERROR) << "Failed to initiate merge.";
+            return state;
+        }
+        // All other states can be handled by ProcessUpdateState.
+        LOG(INFO) << "Waiting for merge to complete. This can take up to several minutes.";
+        state = ProcessUpdateState();
+    }
+
+    LOG(INFO) << "Merge finished with state \"" << state << "\".";
+    return state;
+}
+
+bool SnapshotManager::HandleImminentDataWipe(const std::function<void()>& callback) {
+    if (!device_->IsRecovery()) {
+        LOG(ERROR) << "Data wipes are only allowed in recovery.";
+        return false;
+    }
+
+    auto mount = EnsureMetadataMounted();
+    if (!mount || !mount->HasDevice()) {
+        // We allow the wipe to continue, because if we can't mount /metadata,
+        // it is unlikely the device would have booted anyway. If there is no
+        // metadata partition, then the device predates Virtual A/B.
+        return true;
+    }
+
+    // Check this early, so we don't accidentally start trying to populate
+    // the state file in recovery. Note we don't call GetUpdateState since
+    // we want errors in acquiring the lock to be propagated, instead of
+    // returning UpdateState::None.
+    auto state_file = GetStateFilePath();
+    if (access(state_file.c_str(), F_OK) != 0 && errno == ENOENT) {
+        return true;
+    }
+
+    auto slot_number = SlotNumberForSlotSuffix(device_->GetSlotSuffix());
+    auto super_path = device_->GetSuperDevice(slot_number);
+    if (!CreateLogicalAndSnapshotPartitions(super_path)) {
+        LOG(ERROR) << "Unable to map partitions to complete merge.";
+        return false;
+    }
+
+    UpdateState state = ProcessUpdateState(callback);
+    LOG(INFO) << "Update state in recovery: " << state;
+    switch (state) {
+        case UpdateState::MergeFailed:
+            LOG(ERROR) << "Unrecoverable merge failure detected.";
+            return false;
+        case UpdateState::Unverified: {
+            // If an OTA was just applied but has not yet started merging, we
+            // have no choice but to revert slots, because the current slot will
+            // immediately become unbootable. Rather than wait for the device
+            // to reboot N times until a rollback, we proactively disable the
+            // new slot instead.
+            //
+            // Since the rollback is inevitable, we don't treat a HAL failure
+            // as an error here.
+            std::string old_slot;
+            auto boot_file = GetSnapshotBootIndicatorPath();
+            if (android::base::ReadFileToString(boot_file, &old_slot) &&
+                device_->GetSlotSuffix() != old_slot) {
+                LOG(ERROR) << "Reverting to slot " << old_slot << " since update will be deleted.";
+                device_->SetSlotAsUnbootable(slot_number);
+            }
+            break;
+        }
+        case UpdateState::MergeNeedsReboot:
+            // We shouldn't get here, because nothing is depending on
+            // logical partitions.
+            LOG(ERROR) << "Unexpected merge-needs-reboot state in recovery.";
+            break;
+        default:
+            break;
+    }
+
+    // Nothing should be depending on partitions now, so unmap them all.
+    if (!UnmapAllPartitions()) {
+        LOG(ERROR) << "Unable to unmap all partitions; fastboot may fail to flash.";
+    }
+    return true;
+}
+
 }  // namespace snapshot
 }  // namespace android
diff --git a/fs_mgr/libsnapshot/snapshot_metadata_updater.cpp b/fs_mgr/libsnapshot/snapshot_metadata_updater.cpp
new file mode 100644
index 0000000..60bf796
--- /dev/null
+++ b/fs_mgr/libsnapshot/snapshot_metadata_updater.cpp
@@ -0,0 +1,273 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include "snapshot_metadata_updater.h"
+
+#include <algorithm>
+#include <map>
+#include <optional>
+#include <set>
+#include <string>
+#include <string_view>
+#include <vector>
+
+#include <android-base/logging.h>
+#include <android-base/strings.h>
+#include <fs_mgr.h>
+#include <libsnapshot/snapshot.h>
+
+using android::fs_mgr::MetadataBuilder;
+using android::fs_mgr::Partition;
+using android::fs_mgr::SlotSuffixForSlotNumber;
+using chromeos_update_engine::DeltaArchiveManifest;
+
+namespace android {
+namespace snapshot {
+SnapshotMetadataUpdater::SnapshotMetadataUpdater(MetadataBuilder* builder, uint32_t target_slot,
+                                                 const DeltaArchiveManifest& manifest)
+    : builder_(builder), target_suffix_(SlotSuffixForSlotNumber(target_slot)) {
+    if (!manifest.has_dynamic_partition_metadata()) {
+        return;
+    }
+
+    // Key: partition name ("system"). Value: group name ("group").
+    // No suffix.
+    std::map<std::string_view, std::string_view> partition_group_map;
+    const auto& metadata_groups = manifest.dynamic_partition_metadata().groups();
+    groups_.reserve(metadata_groups.size());
+    for (const auto& group : metadata_groups) {
+        groups_.emplace_back(Group{group.name() + target_suffix_, &group});
+        for (const auto& partition_name : group.partition_names()) {
+            partition_group_map[partition_name] = group.name();
+        }
+    }
+
+    for (const auto& p : manifest.partitions()) {
+        auto it = partition_group_map.find(p.partition_name());
+        if (it != partition_group_map.end()) {
+            partitions_.emplace_back(Partition{p.partition_name() + target_suffix_,
+                                               std::string(it->second) + target_suffix_, &p});
+        }
+    }
+}
+
+bool SnapshotMetadataUpdater::ShrinkPartitions() const {
+    for (const auto& partition_update : partitions_) {
+        auto* existing_partition = builder_->FindPartition(partition_update.name);
+        if (existing_partition == nullptr) {
+            continue;
+        }
+        auto new_size = partition_update->new_partition_info().size();
+        if (existing_partition->size() <= new_size) {
+            continue;
+        }
+        if (!builder_->ResizePartition(existing_partition, new_size)) {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool SnapshotMetadataUpdater::DeletePartitions() const {
+    std::vector<std::string> partitions_to_delete;
+    // Don't delete partitions in groups where the group name doesn't have target_suffix,
+    // e.g. default.
+    for (auto* existing_partition : ListPartitionsWithSuffix(builder_, target_suffix_)) {
+        auto iter = std::find_if(partitions_.begin(), partitions_.end(),
+                                 [existing_partition](auto&& partition_update) {
+                                     return partition_update.name == existing_partition->name();
+                                 });
+        // Update package metadata doesn't have this partition. Prepare to delete it.
+        // Not deleting from builder_ yet because it may break ListPartitionsWithSuffix if it were
+        // to return an iterable view of builder_.
+        if (iter == partitions_.end()) {
+            partitions_to_delete.push_back(existing_partition->name());
+        }
+    }
+
+    for (const auto& partition_name : partitions_to_delete) {
+        builder_->RemovePartition(partition_name);
+    }
+    return true;
+}
+
+bool SnapshotMetadataUpdater::MovePartitionsToDefault() const {
+    for (const auto& partition_update : partitions_) {
+        auto* existing_partition = builder_->FindPartition(partition_update.name);
+        if (existing_partition == nullptr) {
+            continue;
+        }
+        if (existing_partition->group_name() == partition_update.group_name) {
+            continue;
+        }
+        // Move to "default" group (which doesn't have maximum size constraint)
+        // temporarily.
+        if (!builder_->ChangePartitionGroup(existing_partition, android::fs_mgr::kDefaultGroup)) {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool SnapshotMetadataUpdater::ShrinkGroups() const {
+    for (const auto& group_update : groups_) {
+        auto* existing_group = builder_->FindGroup(group_update.name);
+        if (existing_group == nullptr) {
+            continue;
+        }
+        if (existing_group->maximum_size() <= group_update->size()) {
+            continue;
+        }
+        if (!builder_->ChangeGroupSize(existing_group->name(), group_update->size())) {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool SnapshotMetadataUpdater::DeleteGroups() const {
+    std::vector<std::string> existing_groups = builder_->ListGroups();
+    for (const auto& existing_group_name : existing_groups) {
+        // Don't delete groups without target suffix, e.g. default.
+        if (!android::base::EndsWith(existing_group_name, target_suffix_)) {
+            continue;
+        }
+
+        auto iter = std::find_if(groups_.begin(), groups_.end(),
+                                 [&existing_group_name](auto&& group_update) {
+                                     return group_update.name == existing_group_name;
+                                 });
+        // Update package metadata has this group as well, so not deleting it.
+        if (iter != groups_.end()) {
+            continue;
+        }
+        // Update package metadata doesn't have this group. Before deleting it, sanity check that it
+        // doesn't have any partitions left. Update metadata shouldn't assign any partitions to this
+        // group, so all partitions that originally belong to this group should be moved by
+        // MovePartitionsToDefault at this point.
+        auto existing_partitions_in_group = builder_->ListPartitionsInGroup(existing_group_name);
+        if (!existing_partitions_in_group.empty()) {
+            std::vector<std::string> partition_names_in_group;
+            std::transform(existing_partitions_in_group.begin(), existing_partitions_in_group.end(),
+                           std::back_inserter(partition_names_in_group),
+                           [](auto* p) { return p->name(); });
+            LOG(ERROR)
+                    << "Group " << existing_group_name
+                    << " cannot be deleted because the following partitions are left unassigned: ["
+                    << android::base::Join(partition_names_in_group, ",") << "]";
+            return false;
+        }
+        builder_->RemoveGroupAndPartitions(existing_group_name);
+    }
+    return true;
+}
+
+bool SnapshotMetadataUpdater::AddGroups() const {
+    for (const auto& group_update : groups_) {
+        if (builder_->FindGroup(group_update.name) == nullptr) {
+            if (!builder_->AddGroup(group_update.name, group_update->size())) {
+                return false;
+            }
+        }
+    }
+    return true;
+}
+
+bool SnapshotMetadataUpdater::GrowGroups() const {
+    for (const auto& group_update : groups_) {
+        auto* existing_group = builder_->FindGroup(group_update.name);
+        if (existing_group == nullptr) {
+            continue;
+        }
+        if (existing_group->maximum_size() >= group_update->size()) {
+            continue;
+        }
+        if (!builder_->ChangeGroupSize(existing_group->name(), group_update->size())) {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool SnapshotMetadataUpdater::AddPartitions() const {
+    for (const auto& partition_update : partitions_) {
+        if (builder_->FindPartition(partition_update.name) == nullptr) {
+            auto* p =
+                    builder_->AddPartition(partition_update.name, partition_update.group_name,
+                                           LP_PARTITION_ATTR_READONLY | LP_PARTITION_ATTR_UPDATED);
+            if (p == nullptr) {
+                return false;
+            }
+        }
+    }
+    // Will be resized in GrowPartitions.
+    return true;
+}
+
+bool SnapshotMetadataUpdater::GrowPartitions() const {
+    for (const auto& partition_update : partitions_) {
+        auto* existing_partition = builder_->FindPartition(partition_update.name);
+        if (existing_partition == nullptr) {
+            continue;
+        }
+        auto new_size = partition_update->new_partition_info().size();
+        if (existing_partition->size() >= new_size) {
+            continue;
+        }
+        if (!builder_->ResizePartition(existing_partition, new_size)) {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool SnapshotMetadataUpdater::MovePartitionsToCorrectGroup() const {
+    for (const auto& partition_update : partitions_) {
+        auto* existing_partition = builder_->FindPartition(partition_update.name);
+        if (existing_partition == nullptr) {
+            continue;
+        }
+        if (existing_partition->group_name() == partition_update.group_name) {
+            continue;
+        }
+        if (!builder_->ChangePartitionGroup(existing_partition, partition_update.group_name)) {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool SnapshotMetadataUpdater::Update() const {
+    // Remove extents used by COW devices by removing the COW group completely.
+    builder_->RemoveGroupAndPartitions(android::snapshot::kCowGroupName);
+
+    // The order of these operations are important so that we
+    // always have enough space to grow or add new partitions / groups.
+    // clang-format off
+    return ShrinkPartitions() &&
+           DeletePartitions() &&
+           MovePartitionsToDefault() &&
+           ShrinkGroups() &&
+           DeleteGroups() &&
+           AddGroups() &&
+           GrowGroups() &&
+           AddPartitions() &&
+           GrowPartitions() &&
+           MovePartitionsToCorrectGroup();
+    // clang-format on
+}
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/snapshot_metadata_updater.h b/fs_mgr/libsnapshot/snapshot_metadata_updater.h
new file mode 100644
index 0000000..83c9460
--- /dev/null
+++ b/fs_mgr/libsnapshot/snapshot_metadata_updater.h
@@ -0,0 +1,85 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#pragma once
+
+#include <stdint.h>
+
+#include <string>
+#include <vector>
+
+#include <liblp/builder.h>
+#include <update_engine/update_metadata.pb.h>
+
+#include "utility.h"
+
+namespace android {
+namespace snapshot {
+
+// Helper class that modifies a super partition metadata for an update for
+// Virtual A/B devices.
+class SnapshotMetadataUpdater {
+    using DeltaArchiveManifest = chromeos_update_engine::DeltaArchiveManifest;
+    using DynamicPartitionMetadata = chromeos_update_engine::DynamicPartitionMetadata;
+    using DynamicPartitionGroup = chromeos_update_engine::DynamicPartitionGroup;
+    using PartitionUpdate = chromeos_update_engine::PartitionUpdate;
+
+  public:
+    // Caller is responsible for ensuring the lifetime of manifest to be longer
+    // than SnapshotMetadataUpdater.
+    SnapshotMetadataUpdater(android::fs_mgr::MetadataBuilder* builder, uint32_t target_slot,
+                            const DeltaArchiveManifest& manifest);
+    bool Update() const;
+
+  private:
+    bool RenameGroupSuffix() const;
+    bool ShrinkPartitions() const;
+    bool DeletePartitions() const;
+    bool MovePartitionsToDefault() const;
+    bool ShrinkGroups() const;
+    bool DeleteGroups() const;
+    bool AddGroups() const;
+    bool GrowGroups() const;
+    bool AddPartitions() const;
+    bool GrowPartitions() const;
+    bool MovePartitionsToCorrectGroup() const;
+
+    // Wraps a DynamicPartitionGroup with a slot-suffixed name. Always use
+    // .name instead of ->name() because .name has the slot suffix (e.g.
+    // .name is "group_b" and ->name() is "group".)
+    struct Group {
+        std::string name;
+        const DynamicPartitionGroup* group;
+        const DynamicPartitionGroup* operator->() const { return group; }
+    };
+    // Wraps a PartitionUpdate with a slot-suffixed name / group name. Always use
+    // .name instead of ->partition_name() because .name has the slot suffix (e.g.
+    // .name is "system_b" and ->partition_name() is "system".)
+    struct Partition {
+        std::string name;
+        std::string group_name;
+        const PartitionUpdate* partition;
+        const PartitionUpdate* operator->() const { return partition; }
+    };
+
+    android::fs_mgr::MetadataBuilder* const builder_;
+    const std::string target_suffix_;
+    std::vector<Group> groups_;
+    std::vector<Partition> partitions_;
+};
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/snapshot_metadata_updater_test.cpp b/fs_mgr/libsnapshot/snapshot_metadata_updater_test.cpp
new file mode 100644
index 0000000..337be4f
--- /dev/null
+++ b/fs_mgr/libsnapshot/snapshot_metadata_updater_test.cpp
@@ -0,0 +1,331 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include "snapshot_metadata_updater.h"
+
+#include <memory>
+#include <string>
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+#include <liblp/builder.h>
+#include <storage_literals/storage_literals.h>
+
+#include <libsnapshot/test_helpers.h>
+
+using namespace android::storage_literals;
+using android::fs_mgr::LpMetadata;
+using android::fs_mgr::MetadataBuilder;
+using android::fs_mgr::SlotSuffixForSlotNumber;
+using chromeos_update_engine::DeltaArchiveManifest;
+using chromeos_update_engine::DynamicPartitionGroup;
+using chromeos_update_engine::PartitionUpdate;
+using testing::AssertionFailure;
+using testing::AssertionResult;
+using testing::AssertionSuccess;
+
+namespace android {
+namespace snapshot {
+
+class SnapshotMetadataUpdaterTest : public ::testing::TestWithParam<uint32_t> {
+  public:
+    void SetUp() override {
+        target_slot_ = GetParam();
+        target_suffix_ = SlotSuffixForSlotNumber(target_slot_);
+        SnapshotTestPropertyFetcher::SetUp(SlotSuffixForSlotNumber(1 - target_slot_));
+        builder_ = MetadataBuilder::New(4_GiB + 1_MiB, 4_KiB, 2);
+
+        group_ = manifest_.mutable_dynamic_partition_metadata()->add_groups();
+        group_->set_name("group");
+        group_->set_size(4_GiB);
+        group_->add_partition_names("system");
+        group_->add_partition_names("vendor");
+        system_ = manifest_.add_partitions();
+        system_->set_partition_name("system");
+        SetSize(system_, 2_GiB);
+        vendor_ = manifest_.add_partitions();
+        vendor_->set_partition_name("vendor");
+        SetSize(vendor_, 1_GiB);
+
+        ASSERT_TRUE(FillFakeMetadata(builder_.get(), manifest_, target_suffix_));
+    }
+
+    void TearDown() override { SnapshotTestPropertyFetcher::TearDown(); }
+
+    // Append suffix to name.
+    std::string T(std::string_view name) { return std::string(name) + target_suffix_; }
+
+    AssertionResult UpdateAndExport() {
+        SnapshotMetadataUpdater updater(builder_.get(), target_slot_, manifest_);
+        if (!updater.Update()) {
+            return AssertionFailure() << "Update failed.";
+        }
+
+        exported_ = builder_->Export();
+        if (exported_ == nullptr) {
+            return AssertionFailure() << "Export failed.";
+        }
+        return AssertionSuccess();
+    }
+
+    // Check that in |builder_|, partition |name| + |target_suffix_| has the given |size|.
+    AssertionResult CheckSize(std::string_view name, uint64_t size) {
+        auto p = builder_->FindPartition(T(name));
+        if (p == nullptr) {
+            return AssertionFailure() << "Cannot find partition " << T(name);
+        }
+        if (p->size() != size) {
+            return AssertionFailure() << "Partition " << T(name) << " should be " << size
+                                      << " bytes, but is " << p->size() << " bytes.";
+        }
+        return AssertionSuccess() << "Partition" << T(name) << " is " << size << " bytes.";
+    }
+
+    // Check that in |builder_|, group |name| + |target_suffix_| has the given |size|.
+    AssertionResult CheckGroupSize(std::string_view name, uint64_t size) {
+        auto g = builder_->FindGroup(T(name));
+        if (g == nullptr) {
+            return AssertionFailure() << "Cannot find group " << T(name);
+        }
+        if (g->maximum_size() != size) {
+            return AssertionFailure() << "Group " << T(name) << " should be " << size
+                                      << " bytes, but is " << g->maximum_size() << " bytes.";
+        }
+        return AssertionSuccess() << "Group" << T(name) << " is " << size << " bytes.";
+    }
+
+    // Check that in |builder_|, partition |partition_name| + |target_suffix_| is in group
+    // |group_name| + |target_suffix_|;
+    AssertionResult CheckGroupName(std::string_view partition_name, std::string_view group_name) {
+        auto p = builder_->FindPartition(T(partition_name));
+        if (p == nullptr) {
+            return AssertionFailure() << "Cannot find partition " << T(partition_name);
+        }
+        if (p->group_name() != T(group_name)) {
+            return AssertionFailure() << "Partition " << T(partition_name) << " should be in "
+                                      << T(group_name) << ", but is in " << p->group_name() << ".";
+        }
+        return AssertionSuccess() << "Partition" << T(partition_name) << " is in " << T(group_name)
+                                  << ".";
+    }
+
+    std::unique_ptr<MetadataBuilder> builder_;
+    uint32_t target_slot_;
+    std::string target_suffix_;
+    DeltaArchiveManifest manifest_;
+    std::unique_ptr<LpMetadata> exported_;
+    DynamicPartitionGroup* group_ = nullptr;
+    PartitionUpdate* system_ = nullptr;
+    PartitionUpdate* vendor_ = nullptr;
+};
+
+TEST_P(SnapshotMetadataUpdaterTest, NoChange) {
+    EXPECT_TRUE(UpdateAndExport());
+
+    EXPECT_TRUE(CheckGroupSize("group", 4_GiB));
+    EXPECT_TRUE(CheckSize("system", 2_GiB));
+    EXPECT_TRUE(CheckGroupName("system", "group"));
+    EXPECT_TRUE(CheckSize("vendor", 1_GiB));
+    EXPECT_TRUE(CheckGroupName("vendor", "group"));
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, GrowWithinBounds) {
+    SetSize(system_, 2_GiB + 512_MiB);
+    SetSize(vendor_, 1_GiB + 512_MiB);
+
+    ASSERT_TRUE(UpdateAndExport());
+
+    EXPECT_TRUE(CheckSize("system", 2_GiB + 512_MiB));
+    EXPECT_TRUE(CheckSize("vendor", 1_GiB + 512_MiB));
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, GrowOverSuper) {
+    SetSize(system_, 3_GiB);
+    SetSize(vendor_, 1_GiB + 512_MiB);
+
+    EXPECT_FALSE(UpdateAndExport());
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, GrowOverGroup) {
+    SetSize(system_, 3_GiB);
+    SetSize(vendor_, 1_GiB + 4_KiB);
+
+    EXPECT_FALSE(UpdateAndExport());
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, Add) {
+    group_->add_partition_names("product");
+    auto product = manifest_.add_partitions();
+    product->set_partition_name("product");
+    SetSize(product, 1_GiB);
+
+    EXPECT_TRUE(UpdateAndExport());
+
+    EXPECT_TRUE(CheckSize("system", 2_GiB));
+    EXPECT_TRUE(CheckSize("vendor", 1_GiB));
+    EXPECT_TRUE(CheckSize("product", 1_GiB));
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, AddTooBig) {
+    group_->add_partition_names("product");
+    auto product = manifest_.add_partitions();
+    product->set_partition_name("product");
+    SetSize(product, 1_GiB + 4_KiB);
+
+    EXPECT_FALSE(UpdateAndExport());
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, ShrinkAll) {
+    SetSize(system_, 1_GiB);
+    SetSize(vendor_, 512_MiB);
+
+    ASSERT_TRUE(UpdateAndExport());
+
+    EXPECT_TRUE(CheckSize("system", 1_GiB));
+    EXPECT_TRUE(CheckSize("vendor", 512_MiB));
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, ShrinkAndGrow) {
+    SetSize(system_, 3_GiB + 512_MiB);
+    SetSize(vendor_, 512_MiB);
+
+    ASSERT_TRUE(UpdateAndExport());
+
+    EXPECT_TRUE(CheckSize("system", 3_GiB + 512_MiB));
+    EXPECT_TRUE(CheckSize("vendor", 512_MiB));
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, ShrinkAndAdd) {
+    SetSize(system_, 2_GiB);
+    SetSize(vendor_, 512_MiB);
+    group_->add_partition_names("product");
+    auto product = manifest_.add_partitions();
+    product->set_partition_name("product");
+    SetSize(product, 1_GiB + 512_MiB);
+
+    ASSERT_TRUE(UpdateAndExport());
+
+    EXPECT_TRUE(CheckSize("system", 2_GiB));
+    EXPECT_TRUE(CheckSize("vendor", 512_MiB));
+    EXPECT_TRUE(CheckSize("product", 1_GiB + 512_MiB));
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, Delete) {
+    group_->mutable_partition_names()->RemoveLast();
+    // No need to delete it from manifest.partitions as SnapshotMetadataUpdater
+    // should ignore them (treat them as static partitions).
+
+    EXPECT_TRUE(UpdateAndExport());
+
+    EXPECT_TRUE(CheckSize("system", 2_GiB));
+    EXPECT_EQ(nullptr, builder_->FindPartition(T("vendor")));
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, DeleteAndGrow) {
+    group_->mutable_partition_names()->RemoveLast();
+    SetSize(system_, 4_GiB);
+
+    EXPECT_TRUE(UpdateAndExport());
+
+    EXPECT_TRUE(CheckSize("system", 4_GiB));
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, DeleteAndAdd) {
+    group_->mutable_partition_names()->RemoveLast();
+    group_->add_partition_names("product");
+    auto product = manifest_.add_partitions();
+    product->set_partition_name("product");
+    SetSize(product, 2_GiB);
+
+    EXPECT_TRUE(UpdateAndExport());
+
+    EXPECT_TRUE(CheckSize("system", 2_GiB));
+    EXPECT_EQ(nullptr, builder_->FindPartition(T("vendor")));
+    EXPECT_TRUE(CheckSize("product", 2_GiB));
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, GrowGroup) {
+    group_->set_size(4_GiB + 512_KiB);
+    SetSize(system_, 2_GiB + 256_KiB);
+    SetSize(vendor_, 2_GiB + 256_KiB);
+
+    EXPECT_TRUE(UpdateAndExport());
+
+    EXPECT_TRUE(CheckSize("system", 2_GiB + 256_KiB));
+    EXPECT_TRUE(CheckSize("vendor", 2_GiB + 256_KiB));
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, ShrinkGroup) {
+    group_->set_size(1_GiB);
+    SetSize(system_, 512_MiB);
+    SetSize(vendor_, 512_MiB);
+
+    EXPECT_TRUE(UpdateAndExport());
+
+    EXPECT_TRUE(CheckSize("system", 512_MiB));
+    EXPECT_TRUE(CheckSize("vendor", 512_MiB));
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, MoveToNewGroup) {
+    group_->mutable_partition_names()->RemoveLast();
+    group_->set_size(2_GiB);
+
+    auto another_group = manifest_.mutable_dynamic_partition_metadata()->add_groups();
+    another_group->set_name("another_group");
+    another_group->set_size(2_GiB);
+    another_group->add_partition_names("vendor");
+    SetSize(vendor_, 2_GiB);
+
+    EXPECT_TRUE(UpdateAndExport());
+
+    EXPECT_TRUE(CheckGroupSize("group", 2_GiB));
+    EXPECT_TRUE(CheckGroupSize("another_group", 2_GiB));
+    EXPECT_TRUE(CheckSize("system", 2_GiB));
+    EXPECT_TRUE(CheckGroupName("system", "group"));
+    EXPECT_TRUE(CheckSize("vendor", 2_GiB));
+    EXPECT_TRUE(CheckGroupName("vendor", "another_group"));
+}
+
+TEST_P(SnapshotMetadataUpdaterTest, DeleteAndAddGroup) {
+    manifest_.mutable_dynamic_partition_metadata()->mutable_groups()->RemoveLast();
+    group_ = nullptr;
+
+    auto another_group = manifest_.mutable_dynamic_partition_metadata()->add_groups();
+    another_group->set_name("another_group");
+    another_group->set_size(4_GiB);
+    another_group->add_partition_names("system");
+    another_group->add_partition_names("vendor");
+    another_group->add_partition_names("product");
+    auto product = manifest_.add_partitions();
+    product->set_partition_name("product");
+    SetSize(product, 1_GiB);
+
+    EXPECT_TRUE(UpdateAndExport());
+
+    EXPECT_EQ(nullptr, builder_->FindGroup(T("group")));
+    EXPECT_TRUE(CheckGroupSize("another_group", 4_GiB));
+    EXPECT_TRUE(CheckSize("system", 2_GiB));
+    EXPECT_TRUE(CheckGroupName("system", "another_group"));
+    EXPECT_TRUE(CheckSize("vendor", 1_GiB));
+    EXPECT_TRUE(CheckGroupName("vendor", "another_group"));
+    EXPECT_TRUE(CheckSize("product", 1_GiB));
+    EXPECT_TRUE(CheckGroupName("product", "another_group"));
+}
+
+INSTANTIATE_TEST_SUITE_P(Snapshot, SnapshotMetadataUpdaterTest, testing::Values(0, 1));
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/snapshot_test.cpp b/fs_mgr/libsnapshot/snapshot_test.cpp
index 4903224..ff943f2 100644
--- a/fs_mgr/libsnapshot/snapshot_test.cpp
+++ b/fs_mgr/libsnapshot/snapshot_test.cpp
@@ -20,15 +20,26 @@
 #include <sys/types.h>
 
 #include <chrono>
+#include <deque>
+#include <future>
 #include <iostream>
 
 #include <android-base/file.h>
+#include <android-base/logging.h>
 #include <android-base/properties.h>
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
+#include <fs_mgr/roots.h>
+#include <fs_mgr_dm_linear.h>
 #include <gtest/gtest.h>
 #include <libdm/dm.h>
 #include <libfiemap/image_manager.h>
+#include <liblp/builder.h>
+#include <storage_literals/storage_literals.h>
+
+#include <android/snapshot/snapshot.pb.h>
+#include <libsnapshot/test_helpers.h>
+#include "utility.h"
 
 namespace android {
 namespace snapshot {
@@ -36,65 +47,94 @@
 using android::base::unique_fd;
 using android::dm::DeviceMapper;
 using android::dm::DmDeviceState;
+using android::fiemap::IImageManager;
+using android::fs_mgr::BlockDeviceInfo;
+using android::fs_mgr::CreateLogicalPartitionParams;
+using android::fs_mgr::DestroyLogicalPartition;
+using android::fs_mgr::EnsurePathMounted;
+using android::fs_mgr::EnsurePathUnmounted;
+using android::fs_mgr::Extent;
+using android::fs_mgr::Fstab;
+using android::fs_mgr::GetPartitionGroupName;
+using android::fs_mgr::GetPartitionName;
+using android::fs_mgr::Interval;
+using android::fs_mgr::MetadataBuilder;
+using android::fs_mgr::SlotSuffixForSlotNumber;
+using chromeos_update_engine::DeltaArchiveManifest;
+using chromeos_update_engine::DynamicPartitionGroup;
+using chromeos_update_engine::PartitionUpdate;
+using namespace ::testing;
+using namespace android::storage_literals;
 using namespace std::chrono_literals;
 using namespace std::string_literals;
 
-class TestDeviceInfo : public SnapshotManager::IDeviceInfo {
-  public:
-    std::string GetGsidDir() const override { return "ota/test"s; }
-    std::string GetMetadataDir() const override { return "/metadata/ota/test"s; }
-    bool IsRunningSnapshot() const override { return is_running_snapshot_; }
-
-    void set_is_running_snapshot(bool value) { is_running_snapshot_ = value; }
-
-  private:
-    bool is_running_snapshot_;
-};
-
+// Global states. See test_helpers.h.
 std::unique_ptr<SnapshotManager> sm;
 TestDeviceInfo* test_device = nullptr;
+std::string fake_super;
+
+void MountMetadata();
 
 class SnapshotTest : public ::testing::Test {
   public:
     SnapshotTest() : dm_(DeviceMapper::Instance()) {}
 
+    // This is exposed for main.
+    void Cleanup() {
+        InitializeState();
+        CleanupTestArtifacts();
+    }
+
   protected:
     void SetUp() override {
-        test_device->set_is_running_snapshot(false);
-
-        if (sm->GetUpdateState() != UpdateState::None) {
-            CleanupTestArtifacts();
-        }
+        SnapshotTestPropertyFetcher::SetUp();
+        InitializeState();
+        CleanupTestArtifacts();
+        FormatFakeSuper();
+        MountMetadata();
         ASSERT_TRUE(sm->BeginUpdate());
-        ASSERT_TRUE(sm->EnsureImageManager());
-
-        image_manager_ = sm->image_manager();
-        ASSERT_NE(image_manager_, nullptr);
     }
 
     void TearDown() override {
         lock_ = nullptr;
 
         CleanupTestArtifacts();
+        SnapshotTestPropertyFetcher::TearDown();
+    }
+
+    void InitializeState() {
+        ASSERT_TRUE(sm->EnsureImageManager());
+        image_manager_ = sm->image_manager();
+
+        test_device->set_slot_suffix("_a");
     }
 
     void CleanupTestArtifacts() {
         // Normally cancelling inside a merge is not allowed. Since these
         // are tests, we don't care, destroy everything that might exist.
-        std::vector<std::string> snapshots = {"test-snapshot"};
+        // Note we hardcode this list because of an annoying quirk: when
+        // completing a merge, the snapshot stops existing, so we can't
+        // get an accurate list to remove.
+        lock_ = nullptr;
+
+        std::vector<std::string> snapshots = {"test-snapshot", "test_partition_a",
+                                              "test_partition_b"};
         for (const auto& snapshot : snapshots) {
-            DeleteSnapshotDevice(snapshot);
-            temp_images_.emplace_back(snapshot + "-cow");
+            ASSERT_TRUE(DeleteSnapshotDevice(snapshot));
+            DeleteBackingImage(image_manager_, snapshot + "-cow-img");
 
             auto status_file = sm->GetSnapshotStatusFilePath(snapshot);
             android::base::RemoveFileIfExists(status_file);
         }
 
-        // Remove all images.
-        temp_images_.emplace_back("test-snapshot-cow");
-        for (const auto& temp_image : temp_images_) {
-            image_manager_->UnmapImageDevice(temp_image);
-            image_manager_->DeleteBackingImage(temp_image);
+        // Remove stale partitions in fake super.
+        std::vector<std::string> partitions = {
+                "base-device",
+                "test_partition_b",
+                "test_partition_b-base",
+        };
+        for (const auto& partition : partitions) {
+            DeleteDevice(partition);
         }
 
         if (sm->GetUpdateState() != UpdateState::None) {
@@ -104,40 +144,152 @@
     }
 
     bool AcquireLock() {
-        lock_ = sm->OpenStateFile(O_RDWR, LOCK_EX);
+        lock_ = sm->LockExclusive();
         return !!lock_;
     }
 
-    bool CreateTempDevice(const std::string& name, uint64_t size, std::string* path) {
-        if (!image_manager_->CreateBackingImage(name, size, false)) {
-            return false;
-        }
-        temp_images_.emplace_back(name);
-        return image_manager_->MapImageDevice(name, 10s, path);
+    // This is so main() can instantiate this to invoke Cleanup.
+    virtual void TestBody() override {}
+
+    void FormatFakeSuper() {
+        BlockDeviceInfo super_device("super", kSuperSize, 0, 0, 4096);
+        std::vector<BlockDeviceInfo> devices = {super_device};
+
+        auto builder = MetadataBuilder::New(devices, "super", 65536, 2);
+        ASSERT_NE(builder, nullptr);
+
+        auto metadata = builder->Export();
+        ASSERT_NE(metadata, nullptr);
+
+        TestPartitionOpener opener(fake_super);
+        ASSERT_TRUE(FlashPartitionTable(opener, fake_super, *metadata.get()));
     }
 
-    bool DeleteSnapshotDevice(const std::string& snapshot) {
-        if (dm_.GetState(snapshot) != DmDeviceState::INVALID) {
-            if (!dm_.DeleteDevice(snapshot)) return false;
+    // If |path| is non-null, the partition will be mapped after creation.
+    bool CreatePartition(const std::string& name, uint64_t size, std::string* path = nullptr) {
+        TestPartitionOpener opener(fake_super);
+        auto builder = MetadataBuilder::New(opener, "super", 0);
+        if (!builder) return false;
+
+        auto partition = builder->AddPartition(name, 0);
+        if (!partition) return false;
+        if (!builder->ResizePartition(partition, size)) {
+            return false;
         }
-        if (dm_.GetState(snapshot + "-inner") != DmDeviceState::INVALID) {
-            if (!dm_.DeleteDevice(snapshot + "-inner")) return false;
+
+        // Update the source slot.
+        auto metadata = builder->Export();
+        if (!metadata) return false;
+        if (!UpdatePartitionTable(opener, "super", *metadata.get(), 0)) {
+            return false;
+        }
+
+        if (!path) return true;
+
+        CreateLogicalPartitionParams params = {
+                .block_device = fake_super,
+                .metadata = metadata.get(),
+                .partition_name = name,
+                .force_writable = true,
+                .timeout_ms = 10s,
+        };
+        return CreateLogicalPartition(params, path);
+    }
+
+    bool MapUpdatePartitions() {
+        TestPartitionOpener opener(fake_super);
+        auto builder = MetadataBuilder::NewForUpdate(opener, "super", 0, 1);
+        if (!builder) return false;
+
+        auto metadata = builder->Export();
+        if (!metadata) return false;
+
+        // Update the destination slot, mark it as updated.
+        if (!UpdatePartitionTable(opener, "super", *metadata.get(), 1)) {
+            return false;
+        }
+
+        for (const auto& partition : metadata->partitions) {
+            CreateLogicalPartitionParams params = {
+                    .block_device = fake_super,
+                    .metadata = metadata.get(),
+                    .partition = &partition,
+                    .force_writable = true,
+                    .timeout_ms = 10s,
+                    .device_name = GetPartitionName(partition) + "-base",
+            };
+            std::string ignore_path;
+            if (!CreateLogicalPartition(params, &ignore_path)) {
+                return false;
+            }
         }
         return true;
     }
 
+    AssertionResult DeleteSnapshotDevice(const std::string& snapshot) {
+        AssertionResult res = AssertionSuccess();
+        if (!(res = DeleteDevice(snapshot))) return res;
+        if (!(res = DeleteDevice(snapshot + "-inner"))) return res;
+        if (!(res = DeleteDevice(snapshot + "-cow"))) return res;
+        if (!image_manager_->UnmapImageIfExists(snapshot + "-cow-img")) {
+            return AssertionFailure() << "Cannot unmap image " << snapshot << "-cow-img";
+        }
+        if (!(res = DeleteDevice(snapshot + "-base"))) return res;
+        return AssertionSuccess();
+    }
+
+    AssertionResult DeleteDevice(const std::string& device) {
+        if (!dm_.DeleteDeviceIfExists(device)) {
+            return AssertionFailure() << "Can't delete " << device;
+        }
+        return AssertionSuccess();
+    }
+
+    AssertionResult CreateCowImage(const std::string& name) {
+        if (!sm->CreateCowImage(lock_.get(), name)) {
+            return AssertionFailure() << "Cannot create COW image " << name;
+        }
+        std::string cow_device;
+        auto map_res = MapCowImage(name, 10s, &cow_device);
+        if (!map_res) {
+            return map_res;
+        }
+        if (!InitializeCow(cow_device)) {
+            return AssertionFailure() << "Cannot zero fill " << cow_device;
+        }
+        if (!sm->UnmapCowImage(name)) {
+            return AssertionFailure() << "Cannot unmap " << name << " after zero filling it";
+        }
+        return AssertionSuccess();
+    }
+
+    AssertionResult MapCowImage(const std::string& name,
+                                const std::chrono::milliseconds& timeout_ms, std::string* path) {
+        auto cow_image_path = sm->MapCowImage(name, timeout_ms);
+        if (!cow_image_path.has_value()) {
+            return AssertionFailure() << "Cannot map cow image " << name;
+        }
+        *path = *cow_image_path;
+        return AssertionSuccess();
+    }
+
     DeviceMapper& dm_;
     std::unique_ptr<SnapshotManager::LockedFile> lock_;
-    std::vector<std::string> temp_images_;
     android::fiemap::IImageManager* image_manager_ = nullptr;
+    std::string fake_super_;
 };
 
 TEST_F(SnapshotTest, CreateSnapshot) {
     ASSERT_TRUE(AcquireLock());
 
     static const uint64_t kDeviceSize = 1024 * 1024;
-    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), "test-snapshot", kDeviceSize, kDeviceSize,
-                                   kDeviceSize));
+    SnapshotStatus status;
+    status.set_name("test-snapshot");
+    status.set_device_size(kDeviceSize);
+    status.set_snapshot_size(kDeviceSize);
+    status.set_cow_file_size(kDeviceSize);
+    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), &status));
+    ASSERT_TRUE(CreateCowImage("test-snapshot"));
 
     std::vector<std::string> snapshots;
     ASSERT_TRUE(sm->ListSnapshots(lock_.get(), &snapshots));
@@ -146,14 +298,15 @@
 
     // Scope so delete can re-acquire the snapshot file lock.
     {
-        SnapshotManager::SnapshotStatus status;
+        SnapshotStatus status;
         ASSERT_TRUE(sm->ReadSnapshotStatus(lock_.get(), "test-snapshot", &status));
-        ASSERT_EQ(status.state, "created");
-        ASSERT_EQ(status.device_size, kDeviceSize);
-        ASSERT_EQ(status.snapshot_size, kDeviceSize);
+        ASSERT_EQ(status.state(), SnapshotState::CREATED);
+        ASSERT_EQ(status.device_size(), kDeviceSize);
+        ASSERT_EQ(status.snapshot_size(), kDeviceSize);
     }
 
     ASSERT_TRUE(sm->UnmapSnapshot(lock_.get(), "test-snapshot"));
+    ASSERT_TRUE(sm->UnmapCowImage("test-snapshot"));
     ASSERT_TRUE(sm->DeleteSnapshot(lock_.get(), "test-snapshot"));
 }
 
@@ -161,14 +314,23 @@
     ASSERT_TRUE(AcquireLock());
 
     static const uint64_t kDeviceSize = 1024 * 1024;
-    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), "test-snapshot", kDeviceSize, kDeviceSize,
-                                   kDeviceSize));
+    SnapshotStatus status;
+    status.set_name("test-snapshot");
+    status.set_device_size(kDeviceSize);
+    status.set_snapshot_size(kDeviceSize);
+    status.set_cow_file_size(kDeviceSize);
+    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), &status));
+    ASSERT_TRUE(CreateCowImage("test-snapshot"));
 
     std::string base_device;
-    ASSERT_TRUE(CreateTempDevice("base-device", kDeviceSize, &base_device));
+    ASSERT_TRUE(CreatePartition("base-device", kDeviceSize, &base_device));
+
+    std::string cow_device;
+    ASSERT_TRUE(MapCowImage("test-snapshot", 10s, &cow_device));
 
     std::string snap_device;
-    ASSERT_TRUE(sm->MapSnapshot(lock_.get(), "test-snapshot", base_device, 10s, &snap_device));
+    ASSERT_TRUE(sm->MapSnapshot(lock_.get(), "test-snapshot", base_device, cow_device, 10s,
+                                &snap_device));
     ASSERT_TRUE(android::base::StartsWith(snap_device, "/dev/block/dm-"));
 }
 
@@ -177,40 +339,71 @@
 
     static const uint64_t kSnapshotSize = 1024 * 1024;
     static const uint64_t kDeviceSize = 1024 * 1024 * 2;
-    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), "test-snapshot", kDeviceSize, kSnapshotSize,
-                                   kSnapshotSize));
+    SnapshotStatus status;
+    status.set_name("test-snapshot");
+    status.set_device_size(kDeviceSize);
+    status.set_snapshot_size(kSnapshotSize);
+    status.set_cow_file_size(kSnapshotSize);
+    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), &status));
+    ASSERT_TRUE(CreateCowImage("test-snapshot"));
 
     std::string base_device;
-    ASSERT_TRUE(CreateTempDevice("base-device", kDeviceSize, &base_device));
+    ASSERT_TRUE(CreatePartition("base-device", kDeviceSize, &base_device));
+
+    std::string cow_device;
+    ASSERT_TRUE(MapCowImage("test-snapshot", 10s, &cow_device));
 
     std::string snap_device;
-    ASSERT_TRUE(sm->MapSnapshot(lock_.get(), "test-snapshot", base_device, 10s, &snap_device));
+    ASSERT_TRUE(sm->MapSnapshot(lock_.get(), "test-snapshot", base_device, cow_device, 10s,
+                                &snap_device));
     ASSERT_TRUE(android::base::StartsWith(snap_device, "/dev/block/dm-"));
 }
 
 TEST_F(SnapshotTest, NoMergeBeforeReboot) {
-    ASSERT_TRUE(AcquireLock());
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
 
-    // Set the state to Unverified, as if we finished an update.
-    ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::Unverified));
-
-    // Release the lock.
-    lock_ = nullptr;
-
-    // Merge should fail, since we didn't mark the device as rebooted.
+    // Merge should fail, since the slot hasn't changed.
     ASSERT_FALSE(sm->InitiateMerge());
 }
 
+TEST_F(SnapshotTest, CleanFirstStageMount) {
+    // If there's no update in progress, there should be no first-stage mount
+    // needed.
+    TestDeviceInfo* info = new TestDeviceInfo(fake_super);
+    auto sm = SnapshotManager::NewForFirstStageMount(info);
+    ASSERT_NE(sm, nullptr);
+    ASSERT_FALSE(sm->NeedSnapshotsInFirstStageMount());
+}
+
+TEST_F(SnapshotTest, FirstStageMountAfterRollback) {
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // We didn't change the slot, so we shouldn't need snapshots.
+    TestDeviceInfo* info = new TestDeviceInfo(fake_super);
+    auto sm = SnapshotManager::NewForFirstStageMount(info);
+    ASSERT_NE(sm, nullptr);
+    ASSERT_FALSE(sm->NeedSnapshotsInFirstStageMount());
+}
+
 TEST_F(SnapshotTest, Merge) {
     ASSERT_TRUE(AcquireLock());
 
     static const uint64_t kDeviceSize = 1024 * 1024;
-    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), "test-snapshot", kDeviceSize, kDeviceSize,
-                                   kDeviceSize));
 
-    std::string base_device, snap_device;
-    ASSERT_TRUE(CreateTempDevice("base-device", kDeviceSize, &base_device));
-    ASSERT_TRUE(sm->MapSnapshot(lock_.get(), "test-snapshot", base_device, 10s, &snap_device));
+    std::string base_device, cow_device, snap_device;
+    ASSERT_TRUE(CreatePartition("test_partition_a", kDeviceSize));
+    ASSERT_TRUE(MapUpdatePartitions());
+    ASSERT_TRUE(dm_.GetDmDevicePathByName("test_partition_b-base", &base_device));
+    SnapshotStatus status;
+    status.set_name("test_partition_b");
+    status.set_device_size(kDeviceSize);
+    status.set_snapshot_size(kDeviceSize);
+    status.set_cow_file_size(kDeviceSize);
+    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), &status));
+    ASSERT_TRUE(CreateCowImage("test_partition_b"));
+    ASSERT_TRUE(MapCowImage("test_partition_b", 10s, &cow_device));
+    ASSERT_TRUE(sm->MapSnapshot(lock_.get(), "test_partition_b", base_device, cow_device, 10s,
+                                &snap_device));
 
     std::string test_string = "This is a test string.";
     {
@@ -219,36 +412,38 @@
         ASSERT_TRUE(android::base::WriteFully(fd, test_string.data(), test_string.size()));
     }
 
-    // Note: we know the name of the device is test-snapshot because we didn't
-    // request a linear segment.
+    // Note: we know there is no inner/outer dm device since we didn't request
+    // a linear segment.
     DeviceMapper::TargetInfo target;
-    ASSERT_TRUE(sm->IsSnapshotDevice("test-snapshot", &target));
+    ASSERT_TRUE(sm->IsSnapshotDevice("test_partition_b", &target));
     ASSERT_EQ(DeviceMapper::GetTargetType(target.spec), "snapshot");
 
-    // Set the state to Unverified, as if we finished an update.
-    ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::Unverified));
-
     // Release the lock.
     lock_ = nullptr;
 
-    test_device->set_is_running_snapshot(true);
+    // Done updating.
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    test_device->set_slot_suffix("_b");
     ASSERT_TRUE(sm->InitiateMerge());
 
     // The device should have been switched to a snapshot-merge target.
-    ASSERT_TRUE(sm->IsSnapshotDevice("test-snapshot", &target));
+    ASSERT_TRUE(sm->IsSnapshotDevice("test_partition_b", &target));
     ASSERT_EQ(DeviceMapper::GetTargetType(target.spec), "snapshot-merge");
 
     // We should not be able to cancel an update now.
     ASSERT_FALSE(sm->CancelUpdate());
 
-    ASSERT_EQ(sm->WaitForMerge(), UpdateState::MergeCompleted);
+    ASSERT_EQ(sm->ProcessUpdateState(), UpdateState::MergeCompleted);
     ASSERT_EQ(sm->GetUpdateState(), UpdateState::None);
 
     // The device should no longer be a snapshot or snapshot-merge.
-    ASSERT_FALSE(sm->IsSnapshotDevice("test-snapshot"));
+    ASSERT_FALSE(sm->IsSnapshotDevice("test_partition_b"));
 
-    // Test that we can read back the string we wrote to the snapshot.
-    unique_fd fd(open(base_device.c_str(), O_RDONLY | O_CLOEXEC));
+    // Test that we can read back the string we wrote to the snapshot. Note
+    // that the base device is gone now. |snap_device| contains the correct
+    // partition.
+    unique_fd fd(open(snap_device.c_str(), O_RDONLY | O_CLOEXEC));
     ASSERT_GE(fd, 0);
 
     std::string buffer(test_string.size(), '\0');
@@ -256,49 +451,1170 @@
     ASSERT_EQ(test_string, buffer);
 }
 
-TEST_F(SnapshotTest, MergeCannotRemoveCow) {
+TEST_F(SnapshotTest, FirstStageMountAndMerge) {
     ASSERT_TRUE(AcquireLock());
 
     static const uint64_t kDeviceSize = 1024 * 1024;
-    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), "test-snapshot", kDeviceSize, kDeviceSize,
-                                   kDeviceSize));
 
-    std::string base_device, snap_device;
-    ASSERT_TRUE(CreateTempDevice("base-device", kDeviceSize, &base_device));
-    ASSERT_TRUE(sm->MapSnapshot(lock_.get(), "test-snapshot", base_device, 10s, &snap_device));
+    ASSERT_TRUE(CreatePartition("test_partition_a", kDeviceSize));
+    ASSERT_TRUE(MapUpdatePartitions());
+    SnapshotStatus status;
+    status.set_name("test_partition_b");
+    status.set_device_size(kDeviceSize);
+    status.set_snapshot_size(kDeviceSize);
+    status.set_cow_file_size(kDeviceSize);
+    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), &status));
+    ASSERT_TRUE(CreateCowImage("test_partition_b"));
+
+    // Simulate a reboot into the new slot.
+    lock_ = nullptr;
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+    ASSERT_TRUE(DestroyLogicalPartition("test_partition_b-base"));
+
+    auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_NE(init, nullptr);
+    ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+
+    ASSERT_TRUE(AcquireLock());
+
+    // Validate that we have a snapshot device.
+    ASSERT_TRUE(init->ReadSnapshotStatus(lock_.get(), "test_partition_b", &status));
+    ASSERT_EQ(status.state(), SnapshotState::CREATED);
+
+    DeviceMapper::TargetInfo target;
+    auto dm_name = init->GetSnapshotDeviceName("test_partition_b", status);
+    ASSERT_TRUE(init->IsSnapshotDevice(dm_name, &target));
+    ASSERT_EQ(DeviceMapper::GetTargetType(target.spec), "snapshot");
+}
+
+TEST_F(SnapshotTest, FlashSuperDuringUpdate) {
+    ASSERT_TRUE(AcquireLock());
+
+    static const uint64_t kDeviceSize = 1024 * 1024;
+
+    ASSERT_TRUE(CreatePartition("test_partition_a", kDeviceSize));
+    ASSERT_TRUE(MapUpdatePartitions());
+    SnapshotStatus status;
+    status.set_name("test_partition_b");
+    status.set_device_size(kDeviceSize);
+    status.set_snapshot_size(kDeviceSize);
+    status.set_cow_file_size(kDeviceSize);
+    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), &status));
+    ASSERT_TRUE(CreateCowImage("test_partition_b"));
+
+    // Simulate a reboot into the new slot.
+    lock_ = nullptr;
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+    ASSERT_TRUE(DestroyLogicalPartition("test_partition_b-base"));
+
+    // Reflash the super partition.
+    FormatFakeSuper();
+    ASSERT_TRUE(CreatePartition("test_partition_b", kDeviceSize));
+
+    auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_NE(init, nullptr);
+    ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+
+    ASSERT_TRUE(AcquireLock());
+
+    ASSERT_TRUE(init->ReadSnapshotStatus(lock_.get(), "test_partition_b", &status));
+
+    // We should not get a snapshot device now.
+    DeviceMapper::TargetInfo target;
+    auto dm_name = init->GetSnapshotDeviceName("test_partition_b", status);
+    ASSERT_FALSE(init->IsSnapshotDevice(dm_name, &target));
+
+    // We should see a cancelled update as well.
+    lock_ = nullptr;
+    ASSERT_EQ(sm->ProcessUpdateState(), UpdateState::Cancelled);
+}
+
+TEST_F(SnapshotTest, FlashSuperDuringMerge) {
+    ASSERT_TRUE(AcquireLock());
+
+    static const uint64_t kDeviceSize = 1024 * 1024;
+
+    ASSERT_TRUE(CreatePartition("test_partition_a", kDeviceSize));
+    ASSERT_TRUE(MapUpdatePartitions());
+    SnapshotStatus status;
+    status.set_name("test_partition_b");
+    status.set_device_size(kDeviceSize);
+    status.set_snapshot_size(kDeviceSize);
+    status.set_cow_file_size(kDeviceSize);
+    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), &status));
+    ASSERT_TRUE(CreateCowImage("test_partition_b"));
+
+    // Simulate a reboot into the new slot.
+    lock_ = nullptr;
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+    ASSERT_TRUE(DestroyLogicalPartition("test_partition_b-base"));
+
+    auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_NE(init, nullptr);
+    ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+    ASSERT_TRUE(init->InitiateMerge());
+
+    // Now, reflash super. Note that we haven't called ProcessUpdateState, so the
+    // status is still Merging.
+    ASSERT_TRUE(DeleteSnapshotDevice("test_partition_b"));
+    ASSERT_TRUE(init->image_manager()->UnmapImageIfExists("test_partition_b-cow-img"));
+    FormatFakeSuper();
+    ASSERT_TRUE(CreatePartition("test_partition_b", kDeviceSize));
+    ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+
+    // Because the status is Merging, we must call ProcessUpdateState, which should
+    // detect a cancelled update.
+    ASSERT_EQ(sm->ProcessUpdateState(), UpdateState::Cancelled);
+    ASSERT_EQ(sm->GetUpdateState(), UpdateState::None);
+}
+
+TEST_F(SnapshotTest, UpdateBootControlHal) {
+    ASSERT_TRUE(AcquireLock());
+
+    ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::None));
+    ASSERT_EQ(test_device->merge_status(), MergeStatus::NONE);
+
+    ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::Initiated));
+    ASSERT_EQ(test_device->merge_status(), MergeStatus::NONE);
+
+    ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::Unverified));
+    ASSERT_EQ(test_device->merge_status(), MergeStatus::SNAPSHOTTED);
+
+    ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::Merging));
+    ASSERT_EQ(test_device->merge_status(), MergeStatus::MERGING);
+
+    ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::MergeNeedsReboot));
+    ASSERT_EQ(test_device->merge_status(), MergeStatus::NONE);
+
+    ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::MergeCompleted));
+    ASSERT_EQ(test_device->merge_status(), MergeStatus::NONE);
+
+    ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::MergeFailed));
+    ASSERT_EQ(test_device->merge_status(), MergeStatus::MERGING);
+}
+
+enum class Request { UNKNOWN, LOCK_SHARED, LOCK_EXCLUSIVE, UNLOCK, EXIT };
+std::ostream& operator<<(std::ostream& os, Request request) {
+    switch (request) {
+        case Request::LOCK_SHARED:
+            return os << "LOCK_SHARED";
+        case Request::LOCK_EXCLUSIVE:
+            return os << "LOCK_EXCLUSIVE";
+        case Request::UNLOCK:
+            return os << "UNLOCK";
+        case Request::EXIT:
+            return os << "EXIT";
+        case Request::UNKNOWN:
+            [[fallthrough]];
+        default:
+            return os << "UNKNOWN";
+    }
+}
+
+class LockTestConsumer {
+  public:
+    AssertionResult MakeRequest(Request new_request) {
+        {
+            std::unique_lock<std::mutex> ulock(mutex_);
+            requests_.push_back(new_request);
+        }
+        cv_.notify_all();
+        return AssertionSuccess() << "Request " << new_request << " successful";
+    }
+
+    template <typename R, typename P>
+    AssertionResult WaitFulfill(std::chrono::duration<R, P> timeout) {
+        std::unique_lock<std::mutex> ulock(mutex_);
+        if (cv_.wait_for(ulock, timeout, [this] { return requests_.empty(); })) {
+            return AssertionSuccess() << "All requests_ fulfilled.";
+        }
+        return AssertionFailure() << "Timeout waiting for fulfilling " << requests_.size()
+                                  << " request(s), first one is "
+                                  << (requests_.empty() ? Request::UNKNOWN : requests_.front());
+    }
+
+    void StartHandleRequestsInBackground() {
+        future_ = std::async(std::launch::async, &LockTestConsumer::HandleRequests, this);
+    }
+
+  private:
+    void HandleRequests() {
+        static constexpr auto consumer_timeout = 3s;
+
+        auto next_request = Request::UNKNOWN;
+        do {
+            // Peek next request.
+            {
+                std::unique_lock<std::mutex> ulock(mutex_);
+                if (cv_.wait_for(ulock, consumer_timeout, [this] { return !requests_.empty(); })) {
+                    next_request = requests_.front();
+                } else {
+                    next_request = Request::EXIT;
+                }
+            }
+
+            // Handle next request.
+            switch (next_request) {
+                case Request::LOCK_SHARED: {
+                    lock_ = sm->LockShared();
+                } break;
+                case Request::LOCK_EXCLUSIVE: {
+                    lock_ = sm->LockExclusive();
+                } break;
+                case Request::EXIT:
+                    [[fallthrough]];
+                case Request::UNLOCK: {
+                    lock_.reset();
+                } break;
+                case Request::UNKNOWN:
+                    [[fallthrough]];
+                default:
+                    break;
+            }
+
+            // Pop next request. This thread is the only thread that
+            // pops from the front of the requests_ deque.
+            {
+                std::unique_lock<std::mutex> ulock(mutex_);
+                if (next_request == Request::EXIT) {
+                    requests_.clear();
+                } else {
+                    requests_.pop_front();
+                }
+            }
+            cv_.notify_all();
+        } while (next_request != Request::EXIT);
+    }
+
+    std::mutex mutex_;
+    std::condition_variable cv_;
+    std::deque<Request> requests_;
+    std::unique_ptr<SnapshotManager::LockedFile> lock_;
+    std::future<void> future_;
+};
+
+class LockTest : public ::testing::Test {
+  public:
+    void SetUp() {
+        first_consumer.StartHandleRequestsInBackground();
+        second_consumer.StartHandleRequestsInBackground();
+    }
+
+    void TearDown() {
+        EXPECT_TRUE(first_consumer.MakeRequest(Request::EXIT));
+        EXPECT_TRUE(second_consumer.MakeRequest(Request::EXIT));
+    }
+
+    static constexpr auto request_timeout = 500ms;
+    LockTestConsumer first_consumer;
+    LockTestConsumer second_consumer;
+};
+
+TEST_F(LockTest, SharedShared) {
+    ASSERT_TRUE(first_consumer.MakeRequest(Request::LOCK_SHARED));
+    ASSERT_TRUE(first_consumer.WaitFulfill(request_timeout));
+    ASSERT_TRUE(second_consumer.MakeRequest(Request::LOCK_SHARED));
+    ASSERT_TRUE(second_consumer.WaitFulfill(request_timeout));
+}
+
+using LockTestParam = std::pair<Request, Request>;
+class LockTestP : public LockTest, public ::testing::WithParamInterface<LockTestParam> {};
+TEST_P(LockTestP, Test) {
+    ASSERT_TRUE(first_consumer.MakeRequest(GetParam().first));
+    ASSERT_TRUE(first_consumer.WaitFulfill(request_timeout));
+    ASSERT_TRUE(second_consumer.MakeRequest(GetParam().second));
+    ASSERT_FALSE(second_consumer.WaitFulfill(request_timeout))
+            << "Should not be able to " << GetParam().second << " while separate thread "
+            << GetParam().first;
+    ASSERT_TRUE(first_consumer.MakeRequest(Request::UNLOCK));
+    ASSERT_TRUE(second_consumer.WaitFulfill(request_timeout))
+            << "Should be able to hold lock that is released by separate thread";
+}
+INSTANTIATE_TEST_SUITE_P(
+        LockTest, LockTestP,
+        testing::Values(LockTestParam{Request::LOCK_EXCLUSIVE, Request::LOCK_EXCLUSIVE},
+                        LockTestParam{Request::LOCK_EXCLUSIVE, Request::LOCK_SHARED},
+                        LockTestParam{Request::LOCK_SHARED, Request::LOCK_EXCLUSIVE}),
+        [](const testing::TestParamInfo<LockTestP::ParamType>& info) {
+            std::stringstream ss;
+            ss << info.param.first << "_" << info.param.second;
+            return ss.str();
+        });
+
+class SnapshotUpdateTest : public SnapshotTest {
+  public:
+    void SetUp() override {
+        SnapshotTest::SetUp();
+        Cleanup();
+
+        // Cleanup() changes slot suffix, so initialize it again.
+        test_device->set_slot_suffix("_a");
+
+        opener_ = std::make_unique<TestPartitionOpener>(fake_super);
+
+        // Create a fake update package metadata.
+        // Not using full name "system", "vendor", "product" because these names collide with the
+        // mapped partitions on the running device.
+        // Each test modifies manifest_ slightly to indicate changes to the partition layout.
+        group_ = manifest_.mutable_dynamic_partition_metadata()->add_groups();
+        group_->set_name("group");
+        group_->set_size(kGroupSize);
+        group_->add_partition_names("sys");
+        group_->add_partition_names("vnd");
+        group_->add_partition_names("prd");
+        sys_ = manifest_.add_partitions();
+        sys_->set_partition_name("sys");
+        SetSize(sys_, 3_MiB);
+        vnd_ = manifest_.add_partitions();
+        vnd_->set_partition_name("vnd");
+        SetSize(vnd_, 3_MiB);
+        prd_ = manifest_.add_partitions();
+        prd_->set_partition_name("prd");
+        SetSize(prd_, 3_MiB);
+
+        // Initialize source partition metadata using |manifest_|.
+        src_ = MetadataBuilder::New(*opener_, "super", 0);
+        ASSERT_TRUE(FillFakeMetadata(src_.get(), manifest_, "_a"));
+        // Add sys_b which is like system_other.
+        ASSERT_TRUE(src_->AddGroup("group_b", kGroupSize));
+        auto partition = src_->AddPartition("sys_b", "group_b", 0);
+        ASSERT_NE(nullptr, partition);
+        ASSERT_TRUE(src_->ResizePartition(partition, 1_MiB));
+        auto metadata = src_->Export();
+        ASSERT_NE(nullptr, metadata);
+        ASSERT_TRUE(UpdatePartitionTable(*opener_, "super", *metadata.get(), 0));
+
+        // Map source partitions. Additionally, map sys_b to simulate system_other after flashing.
+        std::string path;
+        for (const auto& name : {"sys_a", "vnd_a", "prd_a", "sys_b"}) {
+            ASSERT_TRUE(CreateLogicalPartition(
+                    CreateLogicalPartitionParams{
+                            .block_device = fake_super,
+                            .metadata_slot = 0,
+                            .partition_name = name,
+                            .timeout_ms = 1s,
+                            .partition_opener = opener_.get(),
+                    },
+                    &path));
+            ASSERT_TRUE(WriteRandomData(path));
+            auto hash = GetHash(path);
+            ASSERT_TRUE(hash.has_value());
+            hashes_[name] = *hash;
+        }
+    }
+    void TearDown() override {
+        Cleanup();
+        SnapshotTest::TearDown();
+    }
+    void Cleanup() {
+        if (!image_manager_) {
+            InitializeState();
+        }
+        MountMetadata();
+        for (const auto& suffix : {"_a", "_b"}) {
+            test_device->set_slot_suffix(suffix);
+            EXPECT_TRUE(sm->CancelUpdate()) << suffix;
+        }
+        EXPECT_TRUE(UnmapAll());
+    }
+
+    AssertionResult IsPartitionUnchanged(const std::string& name) {
+        std::string path;
+        if (!dm_.GetDmDevicePathByName(name, &path)) {
+            return AssertionFailure() << "Path of " << name << " cannot be determined";
+        }
+        auto hash = GetHash(path);
+        if (!hash.has_value()) {
+            return AssertionFailure() << "Cannot read partition " << name << ": " << path;
+        }
+        auto it = hashes_.find(name);
+        if (it == hashes_.end()) {
+            return AssertionFailure() << "No existing hash for " << name << ". Bad test code?";
+        }
+        if (it->second != *hash) {
+            return AssertionFailure() << "Content of " << name << " has changed";
+        }
+        return AssertionSuccess();
+    }
+
+    std::optional<uint64_t> GetSnapshotSize(const std::string& name) {
+        if (!AcquireLock()) {
+            return std::nullopt;
+        }
+        auto local_lock = std::move(lock_);
+
+        SnapshotStatus status;
+        if (!sm->ReadSnapshotStatus(local_lock.get(), name, &status)) {
+            return std::nullopt;
+        }
+        return status.snapshot_size();
+    }
+
+    AssertionResult UnmapAll() {
+        for (const auto& name : {"sys", "vnd", "prd"}) {
+            if (!dm_.DeleteDeviceIfExists(name + "_a"s)) {
+                return AssertionFailure() << "Cannot unmap " << name << "_a";
+            }
+            if (!DeleteSnapshotDevice(name + "_b"s)) {
+                return AssertionFailure() << "Cannot delete snapshot " << name << "_b";
+            }
+        }
+        return AssertionSuccess();
+    }
+
+    AssertionResult MapUpdateSnapshot(const std::string& name, std::string* path = nullptr) {
+        std::string real_path;
+        if (!sm->MapUpdateSnapshot(
+                    CreateLogicalPartitionParams{
+                            .block_device = fake_super,
+                            .metadata_slot = 1,
+                            .partition_name = name,
+                            .timeout_ms = 10s,
+                            .partition_opener = opener_.get(),
+                    },
+                    &real_path)) {
+            return AssertionFailure() << "Unable to map snapshot " << name;
+        }
+        if (path) {
+            *path = real_path;
+        }
+        return AssertionSuccess() << "Mapped snapshot " << name << " to " << real_path;
+    }
+
+    AssertionResult WriteSnapshotAndHash(const std::string& name,
+                                         std::optional<size_t> size = std::nullopt) {
+        std::string path;
+        auto res = MapUpdateSnapshot(name, &path);
+        if (!res) {
+            return res;
+        }
+
+        std::string size_string = size ? (std::to_string(*size) + " bytes") : "";
+
+        if (!WriteRandomData(path, size, &hashes_[name])) {
+            return AssertionFailure() << "Unable to write " << size_string << " to " << path
+                                      << " for partition " << name;
+        }
+
+        return AssertionSuccess() << "Written " << size_string << " to " << path
+                                  << " for snapshot partition " << name
+                                  << ", hash: " << hashes_[name];
+    }
+
+    std::unique_ptr<TestPartitionOpener> opener_;
+    DeltaArchiveManifest manifest_;
+    std::unique_ptr<MetadataBuilder> src_;
+    std::map<std::string, std::string> hashes_;
+
+    PartitionUpdate* sys_ = nullptr;
+    PartitionUpdate* vnd_ = nullptr;
+    PartitionUpdate* prd_ = nullptr;
+    DynamicPartitionGroup* group_ = nullptr;
+};
+
+// Test full update flow executed by update_engine. Some partitions uses super empty space,
+// some uses images, and some uses both.
+// Also test UnmapUpdateSnapshot unmaps everything.
+// Also test first stage mount and merge after this.
+TEST_F(SnapshotUpdateTest, FullUpdateFlow) {
+    // OTA client blindly unmaps all partitions that are possibly mapped.
+    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
+        ASSERT_TRUE(sm->UnmapUpdateSnapshot(name));
+    }
+
+    // Grow all partitions.
+    constexpr uint64_t partition_size = 3788_KiB;
+    SetSize(sys_, partition_size);
+    SetSize(vnd_, partition_size);
+    SetSize(prd_, partition_size);
+
+    // Create fake install operations to grow the COW device size.
+    for (auto& partition : {sys_, vnd_, prd_}) {
+        auto e = partition->add_operations()->add_dst_extents();
+        e->set_start_block(0);
+        e->set_num_blocks(GetSize(partition) / manifest_.block_size());
+    }
+
+    // Execute the update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+
+    // Test that partitions prioritize using space in super.
+    auto tgt = MetadataBuilder::New(*opener_, "super", 1);
+    ASSERT_NE(nullptr, tgt->FindPartition("sys_b-cow"));
+    ASSERT_NE(nullptr, tgt->FindPartition("vnd_b-cow"));
+    ASSERT_EQ(nullptr, tgt->FindPartition("prd_b-cow"));
+
+    // Write some data to target partitions.
+    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
+        ASSERT_TRUE(WriteSnapshotAndHash(name, partition_size));
+    }
+
+    // Assert that source partitions aren't affected.
+    for (const auto& name : {"sys_a", "vnd_a", "prd_a"}) {
+        ASSERT_TRUE(IsPartitionUnchanged(name));
+    }
+
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    // After reboot, init does first stage mount.
+    auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_NE(init, nullptr);
+    ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+
+    // Check that the target partitions have the same content.
+    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
+        ASSERT_TRUE(IsPartitionUnchanged(name));
+    }
+
+    // Initiate the merge and wait for it to be completed.
+    ASSERT_EQ(UpdateState::MergeCompleted, init->InitiateMergeAndWait());
+
+    // Check that the target partitions have the same content after the merge.
+    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
+        ASSERT_TRUE(IsPartitionUnchanged(name))
+                << "Content of " << name << " changes after the merge";
+    }
+}
+
+// Test that if new system partitions uses empty space in super, that region is not snapshotted.
+TEST_F(SnapshotUpdateTest, DirectWriteEmptySpace) {
+    GTEST_SKIP() << "b/141889746";
+    SetSize(sys_, 4_MiB);
+    // vnd_b and prd_b are unchanged.
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+    ASSERT_EQ(3_MiB, GetSnapshotSize("sys_b").value_or(0));
+}
+
+// Test that if new system partitions uses space of old vendor partition, that region is
+// snapshotted.
+TEST_F(SnapshotUpdateTest, SnapshotOldPartitions) {
+    SetSize(sys_, 4_MiB);  // grows
+    SetSize(vnd_, 2_MiB);  // shrinks
+    // prd_b is unchanged
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+    ASSERT_EQ(4_MiB, GetSnapshotSize("sys_b").value_or(0));
+}
+
+// Test that even if there seem to be empty space in target metadata, COW partition won't take
+// it because they are used by old partitions.
+TEST_F(SnapshotUpdateTest, CowPartitionDoNotTakeOldPartitions) {
+    SetSize(sys_, 2_MiB);  // shrinks
+    // vnd_b and prd_b are unchanged.
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+
+    auto tgt = MetadataBuilder::New(*opener_, "super", 1);
+    ASSERT_NE(nullptr, tgt);
+    auto metadata = tgt->Export();
+    ASSERT_NE(nullptr, metadata);
+    std::vector<std::string> written;
+    // Write random data to all COW partitions in super
+    for (auto p : metadata->partitions) {
+        if (GetPartitionGroupName(metadata->groups[p.group_index]) != kCowGroupName) {
+            continue;
+        }
+        std::string path;
+        ASSERT_TRUE(CreateLogicalPartition(
+                CreateLogicalPartitionParams{
+                        .block_device = fake_super,
+                        .metadata = metadata.get(),
+                        .partition = &p,
+                        .timeout_ms = 1s,
+                        .partition_opener = opener_.get(),
+                },
+                &path));
+        ASSERT_TRUE(WriteRandomData(path));
+        written.push_back(GetPartitionName(p));
+    }
+    ASSERT_FALSE(written.empty())
+            << "No COW partitions are created even if there are empty space in super partition";
+
+    // Make sure source partitions aren't affected.
+    for (const auto& name : {"sys_a", "vnd_a", "prd_a"}) {
+        ASSERT_TRUE(IsPartitionUnchanged(name));
+    }
+}
+
+// Test that it crashes after creating snapshot status file but before creating COW image, then
+// calling CreateUpdateSnapshots again works.
+TEST_F(SnapshotUpdateTest, SnapshotStatusFileWithoutCow) {
+    // Write some trash snapshot files to simulate leftovers from previous runs.
+    {
+        ASSERT_TRUE(AcquireLock());
+        auto local_lock = std::move(lock_);
+        SnapshotStatus status;
+        status.set_name("sys_b");
+        ASSERT_TRUE(sm->WriteSnapshotStatus(local_lock.get(), status));
+        ASSERT_TRUE(image_manager_->CreateBackingImage("sys_b-cow-img", 1_MiB,
+                                                       IImageManager::CREATE_IMAGE_DEFAULT));
+    }
+
+    // Redo the update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->UnmapUpdateSnapshot("sys_b"));
+
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+
+    // Check that target partitions can be mapped.
+    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
+        EXPECT_TRUE(MapUpdateSnapshot(name));
+    }
+}
+
+// Test that the old partitions are not modified.
+TEST_F(SnapshotUpdateTest, TestRollback) {
+    // Execute the update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->UnmapUpdateSnapshot("sys_b"));
+
+    // Create fake install operations to grow the COW device size.
+    for (auto& partition : {sys_, vnd_, prd_}) {
+        auto e = partition->add_operations()->add_dst_extents();
+        e->set_start_block(0);
+        e->set_num_blocks(GetSize(partition) / manifest_.block_size());
+    }
+
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+
+    // Write some data to target partitions.
+    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
+        ASSERT_TRUE(WriteSnapshotAndHash(name));
+    }
+
+    // Assert that source partitions aren't affected.
+    for (const auto& name : {"sys_a", "vnd_a", "prd_a"}) {
+        ASSERT_TRUE(IsPartitionUnchanged(name));
+    }
+
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    // After reboot, init does first stage mount.
+    auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_NE(init, nullptr);
+    ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+
+    // Check that the target partitions have the same content.
+    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
+        ASSERT_TRUE(IsPartitionUnchanged(name));
+    }
+
+    // Simulate shutting down the device again.
+    ASSERT_TRUE(UnmapAll());
+    init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_a"));
+    ASSERT_NE(init, nullptr);
+    ASSERT_FALSE(init->NeedSnapshotsInFirstStageMount());
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+
+    // Assert that the source partitions aren't affected.
+    for (const auto& name : {"sys_a", "vnd_a", "prd_a"}) {
+        ASSERT_TRUE(IsPartitionUnchanged(name));
+    }
+}
+
+// Test that if an update is applied but not booted into, it can be canceled.
+TEST_F(SnapshotUpdateTest, CancelAfterApply) {
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+    ASSERT_TRUE(sm->CancelUpdate());
+}
+
+static std::vector<Interval> ToIntervals(const std::vector<std::unique_ptr<Extent>>& extents) {
+    std::vector<Interval> ret;
+    std::transform(extents.begin(), extents.end(), std::back_inserter(ret),
+                   [](const auto& extent) { return extent->AsLinearExtent()->AsInterval(); });
+    return ret;
+}
+
+// Test that at the second update, old COW partition spaces are reclaimed.
+TEST_F(SnapshotUpdateTest, ReclaimCow) {
+    // Execute the first update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    // After reboot, init does first stage mount.
+    auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_NE(init, nullptr);
+    ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+    init = nullptr;
+
+    // Initiate the merge and wait for it to be completed.
+    auto new_sm = SnapshotManager::New(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_EQ(UpdateState::MergeCompleted, new_sm->InitiateMergeAndWait());
+
+    // Execute the second update.
+    ASSERT_TRUE(new_sm->BeginUpdate());
+    ASSERT_TRUE(new_sm->CreateUpdateSnapshots(manifest_));
+
+    // Check that the old COW space is reclaimed and does not occupy space of mapped partitions.
+    auto src = MetadataBuilder::New(*opener_, "super", 1);
+    auto tgt = MetadataBuilder::New(*opener_, "super", 0);
+    for (const auto& cow_part_name : {"sys_a-cow", "vnd_a-cow", "prd_a-cow"}) {
+        auto* cow_part = tgt->FindPartition(cow_part_name);
+        ASSERT_NE(nullptr, cow_part) << cow_part_name << " does not exist in target metadata";
+        auto cow_intervals = ToIntervals(cow_part->extents());
+        for (const auto& old_part_name : {"sys_b", "vnd_b", "prd_b"}) {
+            auto* old_part = src->FindPartition(old_part_name);
+            ASSERT_NE(nullptr, old_part) << old_part_name << " does not exist in source metadata";
+            auto old_intervals = ToIntervals(old_part->extents());
+
+            auto intersect = Interval::Intersect(cow_intervals, old_intervals);
+            ASSERT_TRUE(intersect.empty()) << "COW uses space of source partitions";
+        }
+    }
+}
+
+TEST_F(SnapshotUpdateTest, RetrofitAfterRegularAb) {
+    constexpr auto kRetrofitGroupSize = kGroupSize / 2;
+
+    // Initialize device-mapper / disk
+    ASSERT_TRUE(UnmapAll());
+    FormatFakeSuper();
+
+    // Setup source partition metadata to have both _a and _b partitions.
+    src_ = MetadataBuilder::New(*opener_, "super", 0);
+    ASSERT_NE(nullptr, src_);
+    for (const auto& suffix : {"_a"s, "_b"s}) {
+        ASSERT_TRUE(src_->AddGroup(group_->name() + suffix, kRetrofitGroupSize));
+        for (const auto& name : {"sys"s, "vnd"s, "prd"s}) {
+            auto partition = src_->AddPartition(name + suffix, group_->name() + suffix, 0);
+            ASSERT_NE(nullptr, partition);
+            ASSERT_TRUE(src_->ResizePartition(partition, 2_MiB));
+        }
+    }
+    auto metadata = src_->Export();
+    ASSERT_NE(nullptr, metadata);
+    ASSERT_TRUE(UpdatePartitionTable(*opener_, "super", *metadata.get(), 0));
+
+    // Flash source partitions
+    std::string path;
+    for (const auto& name : {"sys_a", "vnd_a", "prd_a"}) {
+        ASSERT_TRUE(CreateLogicalPartition(
+                CreateLogicalPartitionParams{
+                        .block_device = fake_super,
+                        .metadata_slot = 0,
+                        .partition_name = name,
+                        .timeout_ms = 1s,
+                        .partition_opener = opener_.get(),
+                },
+                &path));
+        ASSERT_TRUE(WriteRandomData(path));
+        auto hash = GetHash(path);
+        ASSERT_TRUE(hash.has_value());
+        hashes_[name] = *hash;
+    }
+
+    // Setup manifest.
+    group_->set_size(kRetrofitGroupSize);
+    for (auto* partition : {sys_, vnd_, prd_}) {
+        SetSize(partition, 2_MiB);
+        auto* e = partition->add_operations()->add_dst_extents();
+        e->set_start_block(0);
+        e->set_num_blocks(2_MiB / manifest_.block_size());
+    }
+
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+
+    // Test that COW image should not be created for retrofit devices; super
+    // should be big enough.
+    ASSERT_FALSE(image_manager_->BackingImageExists("sys_b-cow-img"));
+    ASSERT_FALSE(image_manager_->BackingImageExists("vnd_b-cow-img"));
+    ASSERT_FALSE(image_manager_->BackingImageExists("prd_b-cow-img"));
+
+    // Write some data to target partitions.
+    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
+        ASSERT_TRUE(WriteSnapshotAndHash(name));
+    }
+
+    // Assert that source partitions aren't affected.
+    for (const auto& name : {"sys_a", "vnd_a", "prd_a"}) {
+        ASSERT_TRUE(IsPartitionUnchanged(name));
+    }
+
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+}
+
+TEST_F(SnapshotUpdateTest, MergeCannotRemoveCow) {
+    // Make source partitions as big as possible to force COW image to be created.
+    SetSize(sys_, 5_MiB);
+    SetSize(vnd_, 5_MiB);
+    SetSize(prd_, 5_MiB);
+    src_ = MetadataBuilder::New(*opener_, "super", 0);
+    src_->RemoveGroupAndPartitions(group_->name() + "_a");
+    src_->RemoveGroupAndPartitions(group_->name() + "_b");
+    ASSERT_TRUE(FillFakeMetadata(src_.get(), manifest_, "_a"));
+    auto metadata = src_->Export();
+    ASSERT_NE(nullptr, metadata);
+    ASSERT_TRUE(UpdatePartitionTable(*opener_, "super", *metadata.get(), 0));
+
+    // OTA client blindly unmaps all partitions that are possibly mapped.
+    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
+        ASSERT_TRUE(sm->UnmapUpdateSnapshot(name));
+    }
+
+    // Add operations for sys. The whole device is written.
+    auto e = sys_->add_operations()->add_dst_extents();
+    e->set_start_block(0);
+    e->set_num_blocks(GetSize(sys_) / manifest_.block_size());
+
+    // Execute the update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    // After reboot, init does first stage mount.
+    // Normally we should use NewForFirstStageMount, but if so, "gsid.mapped_image.sys_b-cow-img"
+    // won't be set.
+    auto init = SnapshotManager::New(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_NE(init, nullptr);
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
 
     // Keep an open handle to the cow device. This should cause the merge to
     // be incomplete.
-    auto cow_path = android::base::GetProperty("gsid.mapped_image.test-snapshot-cow", "");
+    auto cow_path = android::base::GetProperty("gsid.mapped_image.sys_b-cow-img", "");
     unique_fd fd(open(cow_path.c_str(), O_RDONLY | O_CLOEXEC));
     ASSERT_GE(fd, 0);
 
-    // Set the state to Unverified, as if we finished an update.
-    ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::Unverified));
-
-    // Release the lock.
-    lock_ = nullptr;
-
-    test_device->set_is_running_snapshot(true);
-    ASSERT_TRUE(sm->InitiateMerge());
-
     // COW cannot be removed due to open fd, so expect a soft failure.
-    ASSERT_EQ(sm->WaitForMerge(), UpdateState::MergeNeedsReboot);
+    ASSERT_EQ(UpdateState::MergeNeedsReboot, init->InitiateMergeAndWait());
 
-    // Forcefully delete the snapshot device, so it looks like we just rebooted.
-    ASSERT_TRUE(DeleteSnapshotDevice("test-snapshot"));
+    // Simulate shutting down the device.
+    fd.reset();
+    ASSERT_TRUE(UnmapAll());
 
-    // Map snapshot should fail now, because we're in a merge-complete state.
-    ASSERT_TRUE(AcquireLock());
-    ASSERT_FALSE(sm->MapSnapshot(lock_.get(), "test-snapshot", base_device, 10s, &snap_device));
+    // init does first stage mount again.
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
 
-    // Release everything and now the merge should complete.
-    fd = {};
-    lock_ = nullptr;
+    // sys_b should be mapped as a dm-linear device directly.
+    ASSERT_FALSE(sm->IsSnapshotDevice("sys_b", nullptr));
 
-    ASSERT_EQ(sm->WaitForMerge(), UpdateState::MergeCompleted);
+    // Merge should be able to complete now.
+    ASSERT_EQ(UpdateState::MergeCompleted, init->InitiateMergeAndWait());
 }
 
+class MetadataMountedTest : public SnapshotUpdateTest {
+  public:
+    void SetUp() override {
+        metadata_dir_ = test_device->GetMetadataDir();
+        ASSERT_TRUE(ReadDefaultFstab(&fstab_));
+    }
+    void TearDown() override {
+        SetUp();
+        // Remount /metadata
+        test_device->set_recovery(false);
+        EXPECT_TRUE(android::fs_mgr::EnsurePathMounted(&fstab_, metadata_dir_));
+    }
+    AssertionResult IsMetadataMounted() {
+        Fstab mounted_fstab;
+        if (!ReadFstabFromFile("/proc/mounts", &mounted_fstab)) {
+            ADD_FAILURE() << "Failed to scan mounted volumes";
+            return AssertionFailure() << "Failed to scan mounted volumes";
+        }
+
+        auto entry = GetEntryForPath(&fstab_, metadata_dir_);
+        if (entry == nullptr) {
+            return AssertionFailure() << "No mount point found in fstab for path " << metadata_dir_;
+        }
+
+        auto mv = GetEntryForMountPoint(&mounted_fstab, entry->mount_point);
+        if (mv == nullptr) {
+            return AssertionFailure() << metadata_dir_ << " is not mounted";
+        }
+        return AssertionSuccess() << metadata_dir_ << " is mounted";
+    }
+    std::string metadata_dir_;
+    Fstab fstab_;
+};
+
+void MountMetadata() {
+    MetadataMountedTest().TearDown();
+}
+
+TEST_F(MetadataMountedTest, Android) {
+    auto device = sm->EnsureMetadataMounted();
+    EXPECT_NE(nullptr, device);
+    device.reset();
+
+    EXPECT_TRUE(IsMetadataMounted());
+    EXPECT_TRUE(sm->CancelUpdate()) << "Metadata dir should never be unmounted in Android mode";
+}
+
+TEST_F(MetadataMountedTest, Recovery) {
+    test_device->set_recovery(true);
+    metadata_dir_ = test_device->GetMetadataDir();
+
+    EXPECT_TRUE(android::fs_mgr::EnsurePathUnmounted(&fstab_, metadata_dir_));
+    EXPECT_FALSE(IsMetadataMounted());
+
+    auto device = sm->EnsureMetadataMounted();
+    EXPECT_NE(nullptr, device);
+    EXPECT_TRUE(IsMetadataMounted());
+
+    device.reset();
+    EXPECT_FALSE(IsMetadataMounted());
+}
+
+// Test that during a merge, we can wipe data in recovery.
+TEST_F(SnapshotUpdateTest, MergeInRecovery) {
+    // Execute the first update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    // After reboot, init does first stage mount.
+    auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_NE(init, nullptr);
+    ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+    init = nullptr;
+
+    // Initiate the merge and then immediately stop it to simulate a reboot.
+    auto new_sm = SnapshotManager::New(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_TRUE(new_sm->InitiateMerge());
+    ASSERT_TRUE(UnmapAll());
+
+    // Simulate a reboot into recovery.
+    auto test_device = std::make_unique<TestDeviceInfo>(fake_super, "_b");
+    test_device->set_recovery(true);
+    new_sm = SnapshotManager::NewForFirstStageMount(test_device.release());
+
+    ASSERT_TRUE(new_sm->HandleImminentDataWipe());
+    ASSERT_EQ(new_sm->GetUpdateState(), UpdateState::None);
+}
+
+// Test that after an OTA, before a merge, we can wipe data in recovery.
+TEST_F(SnapshotUpdateTest, DataWipeRollbackInRecovery) {
+    // Execute the first update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    // Simulate a reboot into recovery.
+    auto test_device = new TestDeviceInfo(fake_super, "_b");
+    test_device->set_recovery(true);
+    auto new_sm = SnapshotManager::NewForFirstStageMount(test_device);
+
+    ASSERT_TRUE(new_sm->HandleImminentDataWipe());
+    // Manually mount metadata so that we can call GetUpdateState() below.
+    MountMetadata();
+    EXPECT_EQ(new_sm->GetUpdateState(), UpdateState::Unverified);
+    EXPECT_TRUE(test_device->IsSlotUnbootable(1));
+    EXPECT_FALSE(test_device->IsSlotUnbootable(0));
+}
+
+// Test that after an OTA and a bootloader rollback with no merge, we can wipe
+// data in recovery.
+TEST_F(SnapshotUpdateTest, DataWipeAfterRollback) {
+    // Execute the first update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    // Simulate a rollback, with reboot into recovery.
+    auto test_device = new TestDeviceInfo(fake_super, "_a");
+    test_device->set_recovery(true);
+    auto new_sm = SnapshotManager::NewForFirstStageMount(test_device);
+
+    ASSERT_TRUE(new_sm->HandleImminentDataWipe());
+    EXPECT_EQ(new_sm->GetUpdateState(), UpdateState::None);
+    EXPECT_FALSE(test_device->IsSlotUnbootable(0));
+    EXPECT_FALSE(test_device->IsSlotUnbootable(0));
+}
+
+TEST_F(SnapshotUpdateTest, Hashtree) {
+    constexpr auto partition_size = 4_MiB;
+    constexpr auto data_size = 3_MiB;
+    constexpr auto hashtree_size = 512_KiB;
+    constexpr auto fec_size = partition_size - data_size - hashtree_size;
+
+    const auto block_size = manifest_.block_size();
+    SetSize(sys_, partition_size);
+
+    auto e = sys_->add_operations()->add_dst_extents();
+    e->set_start_block(0);
+    e->set_num_blocks(data_size / block_size);
+
+    // Set hastree extents.
+    sys_->mutable_hash_tree_data_extent()->set_start_block(0);
+    sys_->mutable_hash_tree_data_extent()->set_num_blocks(data_size / block_size);
+
+    sys_->mutable_hash_tree_extent()->set_start_block(data_size / block_size);
+    sys_->mutable_hash_tree_extent()->set_num_blocks(hashtree_size / block_size);
+
+    // Set FEC extents.
+    sys_->mutable_fec_data_extent()->set_start_block(0);
+    sys_->mutable_fec_data_extent()->set_num_blocks((data_size + hashtree_size) / block_size);
+
+    sys_->mutable_fec_extent()->set_start_block((data_size + hashtree_size) / block_size);
+    sys_->mutable_fec_extent()->set_num_blocks(fec_size / block_size);
+
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+
+    // Write some data to target partition.
+    ASSERT_TRUE(WriteSnapshotAndHash("sys_b", partition_size));
+
+    // Finish update.
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    // After reboot, init does first stage mount.
+    auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_NE(init, nullptr);
+    ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+
+    // Check that the target partition have the same content. Hashtree and FEC extents
+    // should be accounted for.
+    ASSERT_TRUE(IsPartitionUnchanged("sys_b"));
+}
+
+class FlashAfterUpdateTest : public SnapshotUpdateTest,
+                             public WithParamInterface<std::tuple<uint32_t, bool>> {
+  public:
+    AssertionResult InitiateMerge(const std::string& slot_suffix) {
+        auto sm = SnapshotManager::New(new TestDeviceInfo(fake_super, slot_suffix));
+        if (!sm->CreateLogicalAndSnapshotPartitions("super")) {
+            return AssertionFailure() << "Cannot CreateLogicalAndSnapshotPartitions";
+        }
+        if (!sm->InitiateMerge()) {
+            return AssertionFailure() << "Cannot initiate merge";
+        }
+        return AssertionSuccess();
+    }
+};
+
+TEST_P(FlashAfterUpdateTest, FlashSlotAfterUpdate) {
+    // OTA client blindly unmaps all partitions that are possibly mapped.
+    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
+        ASSERT_TRUE(sm->UnmapUpdateSnapshot(name));
+    }
+
+    // Execute the update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    if (std::get<1>(GetParam()) /* merge */) {
+        ASSERT_TRUE(InitiateMerge("_b"));
+        // Simulate shutting down the device after merge has initiated.
+        ASSERT_TRUE(UnmapAll());
+    }
+
+    auto flashed_slot = std::get<0>(GetParam());
+    auto flashed_slot_suffix = SlotSuffixForSlotNumber(flashed_slot);
+
+    // Simulate flashing |flashed_slot|. This clears the UPDATED flag.
+    auto flashed_builder = MetadataBuilder::New(*opener_, "super", flashed_slot);
+    flashed_builder->RemoveGroupAndPartitions(group_->name() + flashed_slot_suffix);
+    flashed_builder->RemoveGroupAndPartitions(kCowGroupName);
+    ASSERT_TRUE(FillFakeMetadata(flashed_builder.get(), manifest_, flashed_slot_suffix));
+
+    // Deliberately remove a partition from this build so that
+    // InitiateMerge do not switch state to "merging". This is possible in
+    // practice because the list of dynamic partitions may change.
+    ASSERT_NE(nullptr, flashed_builder->FindPartition("prd" + flashed_slot_suffix));
+    flashed_builder->RemovePartition("prd" + flashed_slot_suffix);
+
+    auto flashed_metadata = flashed_builder->Export();
+    ASSERT_NE(nullptr, flashed_metadata);
+    ASSERT_TRUE(UpdatePartitionTable(*opener_, "super", *flashed_metadata, flashed_slot));
+
+    std::string path;
+    for (const auto& name : {"sys", "vnd"}) {
+        ASSERT_TRUE(CreateLogicalPartition(
+                CreateLogicalPartitionParams{
+                        .block_device = fake_super,
+                        .metadata_slot = flashed_slot,
+                        .partition_name = name + flashed_slot_suffix,
+                        .timeout_ms = 1s,
+                        .partition_opener = opener_.get(),
+                },
+                &path));
+        ASSERT_TRUE(WriteRandomData(path));
+        auto hash = GetHash(path);
+        ASSERT_TRUE(hash.has_value());
+        hashes_[name + flashed_slot_suffix] = *hash;
+    }
+
+    // Simulate shutting down the device after flash.
+    ASSERT_TRUE(UnmapAll());
+
+    // Simulate reboot. After reboot, init does first stage mount.
+    auto init = SnapshotManager::NewForFirstStageMount(
+            new TestDeviceInfo(fake_super, flashed_slot_suffix));
+    ASSERT_NE(init, nullptr);
+    if (init->NeedSnapshotsInFirstStageMount()) {
+        ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+    } else {
+        for (const auto& name : {"sys", "vnd"}) {
+            ASSERT_TRUE(CreateLogicalPartition(
+                    CreateLogicalPartitionParams{
+                            .block_device = fake_super,
+                            .metadata_slot = flashed_slot,
+                            .partition_name = name + flashed_slot_suffix,
+                            .timeout_ms = 1s,
+                            .partition_opener = opener_.get(),
+                    },
+                    &path));
+        }
+    }
+
+    // Check that the target partitions have the same content.
+    for (const auto& name : {"sys", "vnd"}) {
+        ASSERT_TRUE(IsPartitionUnchanged(name + flashed_slot_suffix));
+    }
+
+    // There should be no snapshot to merge.
+    auto new_sm = SnapshotManager::New(new TestDeviceInfo(fake_super, flashed_slot_suffix));
+    ASSERT_EQ(UpdateState::Cancelled, new_sm->InitiateMergeAndWait());
+
+    // Next OTA calls CancelUpdate no matter what.
+    ASSERT_TRUE(new_sm->CancelUpdate());
+}
+
+INSTANTIATE_TEST_SUITE_P(Snapshot, FlashAfterUpdateTest, Combine(Values(0, 1), Bool()),
+                         [](const TestParamInfo<FlashAfterUpdateTest::ParamType>& info) {
+                             return "Flash"s + (std::get<0>(info.param) ? "New"s : "Old"s) +
+                                    "Slot"s + (std::get<1>(info.param) ? "After"s : "Before"s) +
+                                    "Merge"s;
+                         });
+
 }  // namespace snapshot
 }  // namespace android
 
@@ -316,10 +1632,14 @@
     ::testing::InitGoogleTest(&argc, argv);
 
     std::vector<std::string> paths = {
+            // clang-format off
             "/data/gsi/ota/test",
+            "/data/gsi/ota/test/super",
             "/metadata/gsi/ota/test",
+            "/metadata/gsi/ota/test/super",
             "/metadata/ota/test",
             "/metadata/ota/test/snapshots",
+            // clang-format on
     };
     for (const auto& path : paths) {
         if (!Mkdir(path)) {
@@ -331,9 +1651,41 @@
     test_device = new TestDeviceInfo();
     sm = SnapshotManager::New(test_device);
     if (!sm) {
-        std::cerr << "Could not create snapshot manager";
+        std::cerr << "Could not create snapshot manager\n";
         return 1;
     }
 
-    return RUN_ALL_TESTS();
+    // Clean up previous run.
+    MetadataMountedTest().TearDown();
+    SnapshotUpdateTest().Cleanup();
+    SnapshotTest().Cleanup();
+
+    // Use a separate image manager for our fake super partition.
+    auto super_images = IImageManager::Open("ota/test/super", 10s);
+    if (!super_images) {
+        std::cerr << "Could not create image manager\n";
+        return 1;
+    }
+
+    // Clean up any old copy.
+    DeleteBackingImage(super_images.get(), "fake-super");
+
+    // Create and map the fake super partition.
+    static constexpr int kImageFlags =
+            IImageManager::CREATE_IMAGE_DEFAULT | IImageManager::CREATE_IMAGE_ZERO_FILL;
+    if (!super_images->CreateBackingImage("fake-super", kSuperSize, kImageFlags)) {
+        std::cerr << "Could not create fake super partition\n";
+        return 1;
+    }
+    if (!super_images->MapImageDevice("fake-super", 10s, &fake_super)) {
+        std::cerr << "Could not map fake super partition\n";
+        return 1;
+    }
+    test_device->set_fake_super(fake_super);
+
+    auto result = RUN_ALL_TESTS();
+
+    DeleteBackingImage(super_images.get(), "fake-super");
+
+    return result;
 }
diff --git a/fs_mgr/libsnapshot/snapshotctl.cpp b/fs_mgr/libsnapshot/snapshotctl.cpp
new file mode 100644
index 0000000..1bc0357
--- /dev/null
+++ b/fs_mgr/libsnapshot/snapshotctl.cpp
@@ -0,0 +1,102 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include <sysexits.h>
+
+#include <chrono>
+#include <iostream>
+#include <map>
+
+#include <android-base/logging.h>
+#include <libsnapshot/snapshot.h>
+
+using namespace std::string_literals;
+
+int Usage() {
+    std::cerr << "snapshotctl: Control snapshots.\n"
+                 "Usage: snapshotctl [action] [flags]\n"
+                 "Actions:\n"
+                 "  dump\n"
+                 "    Print snapshot states.\n"
+                 "  merge [--logcat]\n"
+                 "    Initialize merge and wait for it to be completed.\n"
+                 "    If --logcat is specified, log to logcat. Otherwise, log to stdout.\n";
+    return EX_USAGE;
+}
+
+namespace android {
+namespace snapshot {
+
+bool DumpCmdHandler(int /*argc*/, char** argv) {
+    android::base::InitLogging(argv, &android::base::StderrLogger);
+    return SnapshotManager::New()->Dump(std::cout);
+}
+
+bool MergeCmdHandler(int argc, char** argv) {
+    auto begin = std::chrono::steady_clock::now();
+
+    bool log_to_logcat = false;
+    for (int i = 2; i < argc; ++i) {
+        if (argv[i] == "--logcat"s) {
+            log_to_logcat = true;
+        }
+    }
+    if (log_to_logcat) {
+        android::base::InitLogging(argv);
+    } else {
+        android::base::InitLogging(argv, &android::base::StdioLogger);
+    }
+
+    auto state = SnapshotManager::New()->InitiateMergeAndWait();
+
+    if (state == UpdateState::None) {
+        return true;
+    }
+    if (state == UpdateState::MergeCompleted) {
+        auto end = std::chrono::steady_clock::now();
+        auto passed = std::chrono::duration_cast<std::chrono::milliseconds>(end - begin).count();
+        LOG(INFO) << "Snapshot merged in " << passed << " ms.";
+        return true;
+    }
+
+    LOG(ERROR) << "Snapshot failed to merge with state \"" << state << "\".";
+    return false;
+}
+
+static std::map<std::string, std::function<bool(int, char**)>> kCmdMap = {
+        // clang-format off
+        {"dump", DumpCmdHandler},
+        {"merge", MergeCmdHandler},
+        // clang-format on
+};
+
+}  // namespace snapshot
+}  // namespace android
+
+int main(int argc, char** argv) {
+    using namespace android::snapshot;
+    if (argc < 2) {
+        return Usage();
+    }
+
+    for (const auto& cmd : kCmdMap) {
+        if (cmd.first == argv[1]) {
+            return cmd.second(argc, argv) ? EX_OK : EX_SOFTWARE;
+        }
+    }
+
+    return Usage();
+}
diff --git a/fs_mgr/libsnapshot/snapshotctl.rc b/fs_mgr/libsnapshot/snapshotctl.rc
new file mode 100644
index 0000000..3ab0645
--- /dev/null
+++ b/fs_mgr/libsnapshot/snapshotctl.rc
@@ -0,0 +1,2 @@
+on property:sys.boot_completed=1
+    exec_background - root root -- /system/bin/snapshotctl merge --logcat
diff --git a/fs_mgr/libsnapshot/test_helpers.cpp b/fs_mgr/libsnapshot/test_helpers.cpp
new file mode 100644
index 0000000..f7f25af
--- /dev/null
+++ b/fs_mgr/libsnapshot/test_helpers.cpp
@@ -0,0 +1,171 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <libsnapshot/test_helpers.h>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/unique_fd.h>
+#include <gtest/gtest.h>
+#include <openssl/sha.h>
+
+namespace android {
+namespace snapshot {
+
+using android::base::ReadFully;
+using android::base::unique_fd;
+using android::base::WriteFully;
+using android::fiemap::IImageManager;
+using testing::AssertionFailure;
+using testing::AssertionSuccess;
+
+void DeleteBackingImage(IImageManager* manager, const std::string& name) {
+    if (manager->IsImageMapped(name)) {
+        ASSERT_TRUE(manager->UnmapImageDevice(name));
+    }
+    if (manager->BackingImageExists(name)) {
+        ASSERT_TRUE(manager->DeleteBackingImage(name));
+    }
+}
+
+android::base::unique_fd TestPartitionOpener::Open(const std::string& partition_name,
+                                                   int flags) const {
+    if (partition_name == "super") {
+        return PartitionOpener::Open(fake_super_path_, flags);
+    }
+    return PartitionOpener::Open(partition_name, flags);
+}
+
+bool TestPartitionOpener::GetInfo(const std::string& partition_name,
+                                  android::fs_mgr::BlockDeviceInfo* info) const {
+    if (partition_name == "super") {
+        return PartitionOpener::GetInfo(fake_super_path_, info);
+    }
+    return PartitionOpener::GetInfo(partition_name, info);
+}
+
+std::string TestPartitionOpener::GetDeviceString(const std::string& partition_name) const {
+    if (partition_name == "super") {
+        return fake_super_path_;
+    }
+    return PartitionOpener::GetDeviceString(partition_name);
+}
+
+std::string ToHexString(const uint8_t* buf, size_t len) {
+    char lookup[] = "0123456789abcdef";
+    std::string out(len * 2 + 1, '\0');
+    char* outp = out.data();
+    for (; len > 0; len--, buf++) {
+        *outp++ = (char)lookup[*buf >> 4];
+        *outp++ = (char)lookup[*buf & 0xf];
+    }
+    return out;
+}
+
+bool WriteRandomData(const std::string& path, std::optional<size_t> expect_size,
+                     std::string* hash) {
+    unique_fd rand(open("/dev/urandom", O_RDONLY));
+    unique_fd fd(open(path.c_str(), O_WRONLY));
+
+    SHA256_CTX ctx;
+    if (hash) {
+        SHA256_Init(&ctx);
+    }
+
+    char buf[4096];
+    size_t total_written = 0;
+    while (!expect_size || total_written < *expect_size) {
+        ssize_t n = TEMP_FAILURE_RETRY(read(rand.get(), buf, sizeof(buf)));
+        if (n <= 0) return false;
+        if (!WriteFully(fd.get(), buf, n)) {
+            if (errno == ENOSPC) {
+                break;
+            }
+            PLOG(ERROR) << "Cannot write " << path;
+            return false;
+        }
+        total_written += n;
+        if (hash) {
+            SHA256_Update(&ctx, buf, n);
+        }
+    }
+
+    if (expect_size && total_written != *expect_size) {
+        PLOG(ERROR) << "Written " << total_written << " bytes, expected " << *expect_size;
+        return false;
+    }
+
+    if (hash) {
+        uint8_t out[32];
+        SHA256_Final(out, &ctx);
+        *hash = ToHexString(out, sizeof(out));
+    }
+    return true;
+}
+
+std::optional<std::string> GetHash(const std::string& path) {
+    std::string content;
+    if (!android::base::ReadFileToString(path, &content, true)) {
+        PLOG(ERROR) << "Cannot access " << path;
+        return std::nullopt;
+    }
+    SHA256_CTX ctx;
+    SHA256_Init(&ctx);
+    SHA256_Update(&ctx, content.c_str(), content.size());
+    uint8_t out[32];
+    SHA256_Final(out, &ctx);
+    return ToHexString(out, sizeof(out));
+}
+
+AssertionResult FillFakeMetadata(MetadataBuilder* builder, const DeltaArchiveManifest& manifest,
+                                 const std::string& suffix) {
+    for (const auto& group : manifest.dynamic_partition_metadata().groups()) {
+        if (!builder->AddGroup(group.name() + suffix, group.size())) {
+            return AssertionFailure()
+                   << "Cannot add group " << group.name() << " with size " << group.size();
+        }
+        for (const auto& partition_name : group.partition_names()) {
+            auto p = builder->AddPartition(partition_name + suffix, group.name() + suffix,
+                                           0 /* attr */);
+            if (!p) {
+                return AssertionFailure() << "Cannot add partition " << partition_name + suffix
+                                          << " to group " << group.name() << suffix;
+            }
+        }
+    }
+    for (const auto& partition : manifest.partitions()) {
+        auto p = builder->FindPartition(partition.partition_name() + suffix);
+        if (!p) {
+            return AssertionFailure() << "Cannot resize partition " << partition.partition_name()
+                                      << suffix << "; it is not found.";
+        }
+        if (!builder->ResizePartition(p, partition.new_partition_info().size())) {
+            return AssertionFailure()
+                   << "Cannot resize partition " << partition.partition_name() << suffix
+                   << " to size " << partition.new_partition_info().size();
+        }
+    }
+    return AssertionSuccess();
+}
+
+void SetSize(PartitionUpdate* partition_update, uint64_t size) {
+    partition_update->mutable_new_partition_info()->set_size(size);
+}
+
+uint64_t GetSize(PartitionUpdate* partition_update) {
+    return partition_update->mutable_new_partition_info()->size();
+}
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/utility.cpp b/fs_mgr/libsnapshot/utility.cpp
new file mode 100644
index 0000000..fa1d7f0
--- /dev/null
+++ b/fs_mgr/libsnapshot/utility.cpp
@@ -0,0 +1,156 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "utility.h"
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/strings.h>
+#include <fs_mgr/roots.h>
+
+using android::dm::kSectorSize;
+using android::fs_mgr::EnsurePathMounted;
+using android::fs_mgr::EnsurePathUnmounted;
+using android::fs_mgr::Fstab;
+using android::fs_mgr::GetEntryForPath;
+using android::fs_mgr::MetadataBuilder;
+using android::fs_mgr::Partition;
+using android::fs_mgr::ReadDefaultFstab;
+
+namespace android {
+namespace snapshot {
+
+void AutoDevice::Release() {
+    name_.clear();
+}
+
+AutoDeviceList::~AutoDeviceList() {
+    // Destroy devices in the reverse order because newer devices may have dependencies
+    // on older devices.
+    for (auto it = devices_.rbegin(); it != devices_.rend(); ++it) {
+        it->reset();
+    }
+}
+
+void AutoDeviceList::Release() {
+    for (auto&& p : devices_) {
+        p->Release();
+    }
+}
+
+AutoUnmapDevice::~AutoUnmapDevice() {
+    if (name_.empty()) return;
+    if (!dm_->DeleteDeviceIfExists(name_)) {
+        LOG(ERROR) << "Failed to auto unmap device " << name_;
+    }
+}
+
+AutoUnmapImage::~AutoUnmapImage() {
+    if (name_.empty()) return;
+    if (!images_->UnmapImageIfExists(name_)) {
+        LOG(ERROR) << "Failed to auto unmap cow image " << name_;
+    }
+}
+
+std::vector<Partition*> ListPartitionsWithSuffix(MetadataBuilder* builder,
+                                                 const std::string& suffix) {
+    std::vector<Partition*> ret;
+    for (const auto& group : builder->ListGroups()) {
+        for (auto* partition : builder->ListPartitionsInGroup(group)) {
+            if (!base::EndsWith(partition->name(), suffix)) {
+                continue;
+            }
+            ret.push_back(partition);
+        }
+    }
+    return ret;
+}
+
+AutoDeleteSnapshot::~AutoDeleteSnapshot() {
+    if (!name_.empty() && !manager_->DeleteSnapshot(lock_, name_)) {
+        LOG(ERROR) << "Failed to auto delete snapshot " << name_;
+    }
+}
+
+bool InitializeCow(const std::string& device) {
+    // When the kernel creates a persistent dm-snapshot, it requires a CoW file
+    // to store the modifications. The kernel interface does not specify how
+    // the CoW is used, and there is no standard associated.
+    // By looking at the current implementation, the CoW file is treated as:
+    // - a _NEW_ snapshot if its first 32 bits are zero, so the newly created
+    // dm-snapshot device will look like a perfect copy of the origin device;
+    // - an _EXISTING_ snapshot if the first 32 bits are equal to a
+    // kernel-specified magic number and the CoW file metadata is set as valid,
+    // so it can be used to resume the last state of a snapshot device;
+    // - an _INVALID_ snapshot otherwise.
+    // To avoid zero-filling the whole CoW file when a new dm-snapshot is
+    // created, here we zero-fill only the first chunk to be compliant with
+    // lvm.
+    constexpr ssize_t kDmSnapZeroFillSize = kSectorSize * kSnapshotChunkSize;
+
+    std::vector<uint8_t> zeros(kDmSnapZeroFillSize, 0);
+    android::base::unique_fd fd(open(device.c_str(), O_WRONLY | O_BINARY));
+    if (fd < 0) {
+        PLOG(ERROR) << "Can't open COW device: " << device;
+        return false;
+    }
+
+    LOG(INFO) << "Zero-filling COW device: " << device;
+    if (!android::base::WriteFully(fd, zeros.data(), kDmSnapZeroFillSize)) {
+        PLOG(ERROR) << "Can't zero-fill COW device for " << device;
+        return false;
+    }
+    return true;
+}
+
+std::unique_ptr<AutoUnmountDevice> AutoUnmountDevice::New(const std::string& path) {
+    Fstab fstab;
+    if (!ReadDefaultFstab(&fstab)) {
+        LOG(ERROR) << "Cannot read default fstab";
+        return nullptr;
+    }
+
+    if (GetEntryForPath(&fstab, path) == nullptr) {
+        LOG(INFO) << "EnsureMetadataMounted can't find entry for " << path << ", skipping";
+        return std::unique_ptr<AutoUnmountDevice>(new AutoUnmountDevice("", {}));
+    }
+
+    if (!EnsurePathMounted(&fstab, path)) {
+        LOG(ERROR) << "Cannot mount " << path;
+        return nullptr;
+    }
+    return std::unique_ptr<AutoUnmountDevice>(new AutoUnmountDevice(path, std::move(fstab)));
+}
+
+AutoUnmountDevice::~AutoUnmountDevice() {
+    if (name_.empty()) return;
+    if (!EnsurePathUnmounted(&fstab_, name_)) {
+        LOG(ERROR) << "Cannot unmount " << name_;
+    }
+}
+
+bool WriteStringToFileAtomic(const std::string& content, const std::string& path) {
+    std::string tmp_path = path + ".tmp";
+    if (!android::base::WriteStringToFile(content, tmp_path)) {
+        return false;
+    }
+    if (rename(tmp_path.c_str(), path.c_str()) == -1) {
+        PLOG(ERROR) << "rename failed from " << tmp_path << " to " << path;
+        return false;
+    }
+    return true;
+}
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/utility.h b/fs_mgr/libsnapshot/utility.h
new file mode 100644
index 0000000..5cc572e
--- /dev/null
+++ b/fs_mgr/libsnapshot/utility.h
@@ -0,0 +1,123 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <functional>
+#include <string>
+
+#include <android-base/macros.h>
+#include <fstab/fstab.h>
+#include <libdm/dm.h>
+#include <libfiemap/image_manager.h>
+#include <liblp/builder.h>
+#include <libsnapshot/snapshot.h>
+#include <update_engine/update_metadata.pb.h>
+
+#include <libsnapshot/auto_device.h>
+
+namespace android {
+namespace snapshot {
+
+// Unit is sectors, this is a 4K chunk.
+static constexpr uint32_t kSnapshotChunkSize = 8;
+
+// A list of devices we created along the way.
+// - Whenever a device is created that is subject to GC'ed at the end of
+//   this function, add it to this list.
+// - If any error has occurred, the list is destroyed, and all these devices
+//   are cleaned up.
+// - Upon success, Release() should be called so that the created devices
+//   are kept.
+struct AutoDeviceList {
+    ~AutoDeviceList();
+    template <typename T, typename... Args>
+    void EmplaceBack(Args&&... args) {
+        devices_.emplace_back(std::make_unique<T>(std::forward<Args>(args)...));
+    }
+    void Release();
+
+  private:
+    std::vector<std::unique_ptr<AutoDevice>> devices_;
+};
+
+// Automatically unmap a device upon deletion.
+struct AutoUnmapDevice : AutoDevice {
+    // On destruct, delete |name| from device mapper.
+    AutoUnmapDevice(android::dm::DeviceMapper* dm, const std::string& name)
+        : AutoDevice(name), dm_(dm) {}
+    AutoUnmapDevice(AutoUnmapDevice&& other) = default;
+    ~AutoUnmapDevice();
+
+  private:
+    DISALLOW_COPY_AND_ASSIGN(AutoUnmapDevice);
+    android::dm::DeviceMapper* dm_ = nullptr;
+};
+
+// Automatically unmap an image upon deletion.
+struct AutoUnmapImage : AutoDevice {
+    // On destruct, delete |name| from image manager.
+    AutoUnmapImage(android::fiemap::IImageManager* images, const std::string& name)
+        : AutoDevice(name), images_(images) {}
+    AutoUnmapImage(AutoUnmapImage&& other) = default;
+    ~AutoUnmapImage();
+
+  private:
+    DISALLOW_COPY_AND_ASSIGN(AutoUnmapImage);
+    android::fiemap::IImageManager* images_ = nullptr;
+};
+
+// Automatically deletes a snapshot. |name| should be the name of the partition, e.g. "system_a".
+// Client is responsible for maintaining the lifetime of |manager| and |lock|.
+struct AutoDeleteSnapshot : AutoDevice {
+    AutoDeleteSnapshot(SnapshotManager* manager, SnapshotManager::LockedFile* lock,
+                       const std::string& name)
+        : AutoDevice(name), manager_(manager), lock_(lock) {}
+    AutoDeleteSnapshot(AutoDeleteSnapshot&& other);
+    ~AutoDeleteSnapshot();
+
+  private:
+    DISALLOW_COPY_AND_ASSIGN(AutoDeleteSnapshot);
+    SnapshotManager* manager_ = nullptr;
+    SnapshotManager::LockedFile* lock_ = nullptr;
+};
+
+struct AutoUnmountDevice : AutoDevice {
+    // Empty object that does nothing.
+    AutoUnmountDevice() : AutoDevice("") {}
+    static std::unique_ptr<AutoUnmountDevice> New(const std::string& path);
+    ~AutoUnmountDevice();
+
+  private:
+    AutoUnmountDevice(const std::string& path, android::fs_mgr::Fstab&& fstab)
+        : AutoDevice(path), fstab_(std::move(fstab)) {}
+    android::fs_mgr::Fstab fstab_;
+};
+
+// Return a list of partitions in |builder| with the name ending in |suffix|.
+std::vector<android::fs_mgr::Partition*> ListPartitionsWithSuffix(
+        android::fs_mgr::MetadataBuilder* builder, const std::string& suffix);
+
+// Initialize a device before using it as the COW device for a dm-snapshot device.
+bool InitializeCow(const std::string& device);
+
+// "Atomically" write string to file. This is done by a series of actions:
+// 1. Write to path + ".tmp"
+// 2. Move temporary file to path using rename()
+// Note that rename() is an atomic operation. This function may not work properly if there
+// is an open fd to |path|, because that fd has an old view of the file.
+bool WriteStringToFileAtomic(const std::string& content, const std::string& path);
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libstorage_literals/Android.bp b/fs_mgr/libstorage_literals/Android.bp
new file mode 100644
index 0000000..11611dd
--- /dev/null
+++ b/fs_mgr/libstorage_literals/Android.bp
@@ -0,0 +1,6 @@
+
+cc_library_headers {
+    name: "libstorage_literals_headers",
+    host_supported: true,
+    export_include_dirs: ["."],
+}
diff --git a/fs_mgr/libstorage_literals/storage_literals/storage_literals.h b/fs_mgr/libstorage_literals/storage_literals/storage_literals.h
new file mode 100644
index 0000000..ac0dfbd
--- /dev/null
+++ b/fs_mgr/libstorage_literals/storage_literals/storage_literals.h
@@ -0,0 +1,77 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <stdint.h>
+#include <stdlib.h>
+
+namespace android {
+namespace storage_literals {
+
+template <size_t Power>
+struct Size {
+    static constexpr size_t power = Power;
+    explicit constexpr Size(uint64_t count) : value_(count) {}
+
+    constexpr uint64_t bytes() const { return value_ << power; }
+    constexpr uint64_t count() const { return value_; }
+    constexpr operator uint64_t() const { return bytes(); }
+
+  private:
+    uint64_t value_;
+};
+
+using B = Size<0>;
+using KiB = Size<10>;
+using MiB = Size<20>;
+using GiB = Size<30>;
+
+constexpr B operator""_B(unsigned long long v) {  // NOLINT
+    return B{v};
+}
+
+constexpr KiB operator""_KiB(unsigned long long v) {  // NOLINT
+    return KiB{v};
+}
+
+constexpr MiB operator""_MiB(unsigned long long v) {  // NOLINT
+    return MiB{v};
+}
+
+constexpr GiB operator""_GiB(unsigned long long v) {  // NOLINT
+    return GiB{v};
+}
+
+template <typename Dest, typename Src>
+constexpr Dest size_cast(Src src) {
+    if (Src::power < Dest::power) {
+        return Dest(src.count() >> (Dest::power - Src::power));
+    }
+    if (Src::power > Dest::power) {
+        return Dest(src.count() << (Src::power - Dest::power));
+    }
+    return Dest(src.count());
+}
+
+static_assert(1_B == 1);
+static_assert(1_KiB == 1 << 10);
+static_assert(1_MiB == 1 << 20);
+static_assert(1_GiB == 1 << 30);
+static_assert(size_cast<KiB>(1_B).count() == 0);
+static_assert(size_cast<KiB>(1024_B).count() == 1);
+static_assert(size_cast<KiB>(1_MiB).count() == 1024);
+
+}  // namespace storage_literals
+}  // namespace android
diff --git a/fs_mgr/libvbmeta/Android.bp b/fs_mgr/libvbmeta/Android.bp
new file mode 100644
index 0000000..937e0f3
--- /dev/null
+++ b/fs_mgr/libvbmeta/Android.bp
@@ -0,0 +1,52 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+libvbmeta_lib_deps = [
+    "libbase",
+    "libcrypto",
+]
+
+cc_library {
+    name: "libvbmeta",
+    host_supported: true,
+    srcs: [
+        "builder.cpp",
+        "reader.cpp",
+        "utility.cpp",
+        "writer.cpp",
+    ],
+    shared_libs: [
+        "liblog",
+    ] + libvbmeta_lib_deps,
+    export_include_dirs: ["include"],
+}
+
+cc_test_host {
+    name: "libvbmeta_test",
+    static_libs: [
+        "libsparse",
+        "libvbmeta",
+        "libz",
+    ] + libvbmeta_lib_deps,
+    srcs: [
+        "builder_test.cpp",
+        "super_vbmeta_test.cpp",
+    ],
+    required: [
+        "avbtool",
+        "vbmake",
+    ],
+}
\ No newline at end of file
diff --git a/fs_mgr/libvbmeta/builder.cpp b/fs_mgr/libvbmeta/builder.cpp
new file mode 100644
index 0000000..a901a4f
--- /dev/null
+++ b/fs_mgr/libvbmeta/builder.cpp
@@ -0,0 +1,214 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "builder.h"
+
+#include <android-base/file.h>
+#include <openssl/sha.h>
+
+#include "reader.h"
+#include "utility.h"
+#include "writer.h"
+
+using android::base::ErrnoError;
+using android::base::Error;
+using android::base::Result;
+using android::base::unique_fd;
+
+namespace android {
+namespace fs_mgr {
+
+SuperVBMetaBuilder::SuperVBMetaBuilder() {}
+
+SuperVBMetaBuilder::SuperVBMetaBuilder(const int super_vbmeta_fd,
+                                       const std::map<std::string, std::string>& images_path)
+    : super_vbmeta_fd_(super_vbmeta_fd), images_path_(images_path) {}
+
+Result<void> SuperVBMetaBuilder::Build() {
+    for (const auto& [vbmeta_name, file_path] : images_path_) {
+        Result<std::string> content = ReadVBMetaImageFromFile(file_path);
+        if (!content) {
+            return content.error();
+        }
+
+        Result<uint8_t> vbmeta_index = AddVBMetaImage(vbmeta_name);
+        if (!vbmeta_index) {
+            return vbmeta_index.error();
+        }
+
+        Result<void> rv_export_vbmeta_image =
+                ExportVBMetaImageToFile(vbmeta_index.value(), content.value());
+        if (!rv_export_vbmeta_image) {
+            return rv_export_vbmeta_image;
+        }
+    }
+    return {};
+}
+
+Result<std::string> SuperVBMetaBuilder::ReadVBMetaImageFromFile(const std::string& file) {
+    unique_fd source_fd(TEMP_FAILURE_RETRY(open(file.c_str(), O_RDONLY | O_CLOEXEC)));
+    if (source_fd < 0) {
+        return ErrnoError() << "Couldn't open vbmeta image file " << file;
+    }
+
+    Result<uint64_t> file_size = GetFileSize(source_fd);
+    if (!file_size) {
+        return file_size.error();
+    }
+
+    if (file_size.value() > VBMETA_IMAGE_MAX_SIZE) {
+        return Error() << "vbmeta image file size " << file_size.value() << " is too large";
+    }
+
+    std::unique_ptr<uint8_t[]> buffer = std::make_unique<uint8_t[]>(VBMETA_IMAGE_MAX_SIZE);
+    if (!android::base::ReadFully(source_fd, buffer.get(), file_size.value())) {
+        return ErrnoError() << "Couldn't read vbmeta image file " << file;
+    }
+
+    return std::string(reinterpret_cast<const char*>(buffer.get()), VBMETA_IMAGE_MAX_SIZE);
+}
+
+Result<uint8_t> SuperVBMetaBuilder::GetEmptySlot() {
+    for (uint8_t i = 0; i < VBMETA_IMAGE_MAX_NUM; ++i) {
+        if ((table_.header.in_use & (1 << i)) == 0) return i;
+    }
+    return Error() << "There isn't empty slot in super vbmeta";
+}
+
+Result<uint8_t> SuperVBMetaBuilder::AddVBMetaImage(const std::string& vbmeta_name) {
+    auto desc = std::find_if(
+            table_.descriptors.begin(), table_.descriptors.end(),
+            [&vbmeta_name](const auto& entry) { return entry.vbmeta_name == vbmeta_name; });
+
+    uint8_t slot_number = 0;
+    if (desc != table_.descriptors.end()) {
+        slot_number = desc->vbmeta_index;
+    } else {
+        Result<uint8_t> new_slot = GetEmptySlot();
+        if (!new_slot) {
+            return new_slot;
+        }
+        slot_number = new_slot.value();
+
+        // insert new descriptor into table
+        InternalVBMetaDescriptor new_desc;
+        new_desc.vbmeta_index = slot_number;
+        new_desc.vbmeta_name_length = vbmeta_name.length();
+        new_desc.vbmeta_name = vbmeta_name;
+        memset(new_desc.reserved, 0, sizeof(new_desc.reserved));
+        table_.descriptors.emplace_back(std::move(new_desc));
+
+        // mark slot as in use
+        table_.header.in_use |= (1 << slot_number);
+    }
+
+    return slot_number;
+}
+
+void SuperVBMetaBuilder::DeleteVBMetaImage(const std::string& vbmeta_name) {
+    auto desc = std::find_if(
+            table_.descriptors.begin(), table_.descriptors.end(),
+            [&vbmeta_name](const auto& entry) { return entry.vbmeta_name == vbmeta_name; });
+
+    if (desc != table_.descriptors.end()) {
+        // mark slot as not in use
+        table_.header.in_use &= ~(1 << desc->vbmeta_index);
+
+        // erase descriptor in table
+        table_.descriptors.erase(desc);
+    }
+}
+
+std::unique_ptr<VBMetaTable> SuperVBMetaBuilder::ExportVBMetaTable() {
+    // calculate descriptors size
+    uint32_t descriptors_size = 0;
+    for (const auto& desc : table_.descriptors) {
+        descriptors_size += SUPER_VBMETA_DESCRIPTOR_SIZE + desc.vbmeta_name_length * sizeof(char);
+    }
+
+    // export header
+    table_.header.magic = SUPER_VBMETA_MAGIC;
+    table_.header.major_version = SUPER_VBMETA_MAJOR_VERSION;
+    table_.header.minor_version = SUPER_VBMETA_MINOR_VERSION;
+    table_.header.header_size = SUPER_VBMETA_HEADER_SIZE;
+    table_.header.total_size = SUPER_VBMETA_HEADER_SIZE + descriptors_size;
+    memset(table_.header.checksum, 0, sizeof(table_.header.checksum));
+    table_.header.descriptors_size = descriptors_size;
+    memset(table_.header.reserved, 0, sizeof(table_.header.reserved));
+    std::string serialized_table = SerializeVBMetaTable(table_);
+    ::SHA256(reinterpret_cast<const uint8_t*>(serialized_table.c_str()), table_.header.total_size,
+             &table_.header.checksum[0]);
+
+    return std::make_unique<VBMetaTable>(table_);
+}
+
+Result<void> SuperVBMetaBuilder::ExportVBMetaTableToFile() {
+    std::unique_ptr<VBMetaTable> table = ExportVBMetaTable();
+
+    std::string serialized_table = SerializeVBMetaTable(*table);
+
+    android::base::Result<void> rv_write_primary_vbmeta_table =
+            WritePrimaryVBMetaTable(super_vbmeta_fd_, serialized_table);
+    if (!rv_write_primary_vbmeta_table) {
+        return rv_write_primary_vbmeta_table;
+    }
+
+    android::base::Result<void> rv_write_backup_vbmeta_table =
+            WriteBackupVBMetaTable(super_vbmeta_fd_, serialized_table);
+    return rv_write_backup_vbmeta_table;
+}
+
+Result<void> SuperVBMetaBuilder::ExportVBMetaImageToFile(const uint8_t vbmeta_index,
+                                                         const std::string& vbmeta_image) {
+    Result<void> rv_write_vbmeta_image =
+            WriteVBMetaImage(super_vbmeta_fd_, vbmeta_index, vbmeta_image);
+    if (!rv_write_vbmeta_image) {
+        return rv_write_vbmeta_image;
+    }
+
+    Result<void> rv_validate_vbmeta_image =
+            ValidateVBMetaImage(super_vbmeta_fd_, vbmeta_index, vbmeta_image);
+    return rv_validate_vbmeta_image;
+}
+
+bool WriteToSuperVBMetaFile(const std::string& super_vbmeta_file,
+                            const std::map<std::string, std::string>& images_path) {
+    unique_fd super_vbmeta_fd(TEMP_FAILURE_RETRY(
+            open(super_vbmeta_file.c_str(), O_CREAT | O_RDWR | O_TRUNC | O_CLOEXEC, 0644)));
+    if (super_vbmeta_fd < 0) {
+        PERROR << "Couldn't open super vbmeta file " << super_vbmeta_file;
+        return false;
+    }
+
+    SuperVBMetaBuilder builder(super_vbmeta_fd, images_path);
+
+    Result<void> rv_build = builder.Build();
+    if (!rv_build) {
+        LERROR << rv_build.error();
+        return false;
+    }
+
+    Result<void> rv_export = builder.ExportVBMetaTableToFile();
+    if (!rv_export) {
+        LERROR << rv_export.error();
+        return false;
+    }
+
+    return true;
+}
+
+}  // namespace fs_mgr
+}  // namespace android
\ No newline at end of file
diff --git a/fs_mgr/libvbmeta/builder.h b/fs_mgr/libvbmeta/builder.h
new file mode 100644
index 0000000..58ea36a
--- /dev/null
+++ b/fs_mgr/libvbmeta/builder.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <map>
+#include <string>
+
+#include <android-base/result.h>
+
+#include "super_vbmeta_format.h"
+
+namespace android {
+namespace fs_mgr {
+
+class SuperVBMetaBuilder {
+  public:
+    SuperVBMetaBuilder();
+    SuperVBMetaBuilder(const int super_vbmeta_fd,
+                       const std::map<std::string, std::string>& images_path);
+    android::base::Result<void> Build();
+    android::base::Result<std::string> ReadVBMetaImageFromFile(const std::string& file);
+    // It adds the vbmeta image in super_vbmeta and returns the index
+    // (which has the same meaning with vbmeta_index of VBMetaDescriptor).
+    android::base::Result<uint8_t> AddVBMetaImage(const std::string& vbmeta_name);
+    void DeleteVBMetaImage(const std::string& vbmeta_name);
+    std::unique_ptr<VBMetaTable> ExportVBMetaTable();
+    android::base::Result<void> ExportVBMetaTableToFile();
+    android::base::Result<void> ExportVBMetaImageToFile(const uint8_t vbmeta_index,
+                                                        const std::string& vbmeta_image);
+
+  private:
+    android::base::Result<uint8_t> GetEmptySlot();
+
+    int super_vbmeta_fd_;
+    VBMetaTable table_;
+    // Maps vbmeta image name to vbmeta image file path.
+    std::map<std::string, std::string> images_path_;
+};
+
+}  // namespace fs_mgr
+}  // namespace android
\ No newline at end of file
diff --git a/fs_mgr/libvbmeta/builder_test.cpp b/fs_mgr/libvbmeta/builder_test.cpp
new file mode 100644
index 0000000..9a015fd
--- /dev/null
+++ b/fs_mgr/libvbmeta/builder_test.cpp
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include "builder.h"
+#include "super_vbmeta_format.h"
+
+using android::base::Result;
+using android::fs_mgr::SuperVBMetaBuilder;
+
+TEST(BuilderTest, VBMetaTableBasic) {
+    std::unique_ptr<SuperVBMetaBuilder> builder = std::make_unique<SuperVBMetaBuilder>();
+    ASSERT_NE(builder, nullptr);
+
+    Result<uint8_t> vbmeta_index = builder->AddVBMetaImage("vbmeta" /* vbmeta_name */
+    );
+    EXPECT_TRUE(vbmeta_index);
+
+    Result<uint8_t> vbmeta_system_slot = builder->AddVBMetaImage("vbmeta_system" /* vbmeta_name */
+    );
+    EXPECT_TRUE(vbmeta_system_slot);
+
+    Result<uint8_t> vbmeta_vendor_slot = builder->AddVBMetaImage("vbmeta_vendor" /* vbmeta_name */
+    );
+    EXPECT_TRUE(vbmeta_vendor_slot);
+
+    builder->DeleteVBMetaImage("vbmeta_system" /* vbmeta_name */
+    );
+
+    Result<uint8_t> vbmeta_product_slot = builder->AddVBMetaImage("vbmeta_product" /* vbmeta_name */
+    );
+    EXPECT_TRUE(vbmeta_product_slot);
+
+    std::unique_ptr<VBMetaTable> table = builder->ExportVBMetaTable();
+    ASSERT_NE(table, nullptr);
+
+    // check for vbmeta table header
+    EXPECT_EQ(table->header.magic, SUPER_VBMETA_MAGIC);
+    EXPECT_EQ(table->header.major_version, SUPER_VBMETA_MAJOR_VERSION);
+    EXPECT_EQ(table->header.minor_version, SUPER_VBMETA_MINOR_VERSION);
+    EXPECT_EQ(table->header.header_size, SUPER_VBMETA_HEADER_SIZE);
+    EXPECT_EQ(table->header.total_size,
+              SUPER_VBMETA_HEADER_SIZE + SUPER_VBMETA_DESCRIPTOR_SIZE * 3 + 33);
+    EXPECT_EQ(table->header.descriptors_size, SUPER_VBMETA_DESCRIPTOR_SIZE * 3 + 33);
+
+    // Test for vbmeta table descriptors
+    EXPECT_EQ(table->descriptors.size(), 3);
+
+    EXPECT_EQ(table->descriptors[0].vbmeta_index, 0);
+    EXPECT_EQ(table->descriptors[0].vbmeta_name_length, 6);
+    for (int i = 0; i < sizeof(table->descriptors[0].reserved); i++)
+        EXPECT_EQ(table->descriptors[0].reserved[i], 0);
+    EXPECT_EQ(table->descriptors[0].vbmeta_name, "vbmeta");
+
+    EXPECT_EQ(table->descriptors[1].vbmeta_index, 2);
+    EXPECT_EQ(table->descriptors[1].vbmeta_name_length, 13);
+    for (int i = 0; i < sizeof(table->descriptors[1].reserved); i++)
+        EXPECT_EQ(table->descriptors[1].reserved[i], 0);
+    EXPECT_EQ(table->descriptors[1].vbmeta_name, "vbmeta_vendor");
+
+    EXPECT_EQ(table->descriptors[2].vbmeta_index, 1);
+    EXPECT_EQ(table->descriptors[2].vbmeta_name_length, 14);
+    for (int i = 0; i < sizeof(table->descriptors[2].reserved); i++)
+        EXPECT_EQ(table->descriptors[2].reserved[i], 0);
+    EXPECT_EQ(table->descriptors[2].vbmeta_name, "vbmeta_product");
+}
\ No newline at end of file
diff --git a/libnativeloader/utils.h b/fs_mgr/libvbmeta/include/libvbmeta/libvbmeta.h
similarity index 69%
copy from libnativeloader/utils.h
copy to fs_mgr/libvbmeta/include/libvbmeta/libvbmeta.h
index a1c2be5..ab7ba73 100644
--- a/libnativeloader/utils.h
+++ b/fs_mgr/libvbmeta/include/libvbmeta/libvbmeta.h
@@ -13,14 +13,17 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 #pragma once
 
-namespace android::nativeloader {
+#include <map>
+#include <string>
 
-#if defined(__LP64__)
-#define LIB "lib64"
-#else
-#define LIB "lib"
-#endif
+namespace android {
+namespace fs_mgr {
 
-}  // namespace android::nativeloader
+bool WriteToSuperVBMetaFile(const std::string& super_vbmeta_file,
+                            const std::map<std::string, std::string>& images_path);
+
+}  // namespace fs_mgr
+}  // namespace android
\ No newline at end of file
diff --git a/fs_mgr/libvbmeta/reader.cpp b/fs_mgr/libvbmeta/reader.cpp
new file mode 100644
index 0000000..212d186
--- /dev/null
+++ b/fs_mgr/libvbmeta/reader.cpp
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "reader.h"
+
+#include <android-base/file.h>
+
+using android::base::ErrnoError;
+using android::base::Error;
+using android::base::Result;
+
+namespace android {
+namespace fs_mgr {
+
+Result<void> LoadAndVerifySuperVBMetaHeader(const void* buffer, SuperVBMetaHeader* header) {
+    memcpy(header, buffer, sizeof(*header));
+
+    // Do basic validation of super vbmeta.
+    if (header->magic != SUPER_VBMETA_MAGIC) {
+        return Error() << "Super VBMeta has invalid magic value";
+    }
+
+    // Check that the version is compatible.
+    if (header->major_version != SUPER_VBMETA_MAJOR_VERSION ||
+        header->minor_version > SUPER_VBMETA_MINOR_VERSION) {
+        return Error() << "Super VBMeta has incompatible version";
+    }
+    return {};
+}
+
+void LoadVBMetaDescriptors(const void* buffer, uint32_t size,
+                           std::vector<InternalVBMetaDescriptor>* descriptors) {
+    for (int p = 0; p < size;) {
+        InternalVBMetaDescriptor descriptor;
+        memcpy(&descriptor, (char*)buffer + p, SUPER_VBMETA_DESCRIPTOR_SIZE);
+        p += SUPER_VBMETA_DESCRIPTOR_SIZE;
+
+        descriptor.vbmeta_name = std::string((char*)buffer + p, descriptor.vbmeta_name_length);
+        p += descriptor.vbmeta_name_length;
+
+        descriptors->emplace_back(std::move(descriptor));
+    }
+}
+
+Result<void> ReadVBMetaTable(int fd, uint64_t offset, VBMetaTable* table) {
+    std::unique_ptr<uint8_t[]> header_buffer =
+            std::make_unique<uint8_t[]>(SUPER_VBMETA_HEADER_SIZE);
+    if (!android::base::ReadFullyAtOffset(fd, header_buffer.get(), SUPER_VBMETA_HEADER_SIZE,
+                                          offset)) {
+        return ErrnoError() << "Couldn't read super vbmeta header at offset " << offset;
+    }
+
+    Result<void> rv_header = LoadAndVerifySuperVBMetaHeader(header_buffer.get(), &table->header);
+    if (!rv_header) {
+        return rv_header;
+    }
+
+    const uint64_t descriptors_offset = offset + table->header.header_size;
+    std::unique_ptr<uint8_t[]> descriptors_buffer =
+            std::make_unique<uint8_t[]>(table->header.descriptors_size);
+    if (!android::base::ReadFullyAtOffset(fd, descriptors_buffer.get(),
+                                          table->header.descriptors_size, descriptors_offset)) {
+        return ErrnoError() << "Couldn't read super vbmeta descriptors at offset "
+                            << descriptors_offset;
+    }
+
+    LoadVBMetaDescriptors(descriptors_buffer.get(), table->header.descriptors_size,
+                          &table->descriptors);
+    return {};
+}
+
+Result<void> ReadPrimaryVBMetaTable(int fd, VBMetaTable* table) {
+    uint64_t offset = PRIMARY_SUPER_VBMETA_TABLE_OFFSET;
+    return ReadVBMetaTable(fd, offset, table);
+}
+
+Result<void> ReadBackupVBMetaTable(int fd, VBMetaTable* table) {
+    uint64_t offset = BACKUP_SUPER_VBMETA_TABLE_OFFSET;
+    return ReadVBMetaTable(fd, offset, table);
+}
+
+Result<std::string> ReadVBMetaImage(int fd, int slot) {
+    const uint64_t offset = 2 * SUPER_VBMETA_TABLE_MAX_SIZE + slot * VBMETA_IMAGE_MAX_SIZE;
+    std::unique_ptr<uint8_t[]> buffer = std::make_unique<uint8_t[]>(VBMETA_IMAGE_MAX_SIZE);
+    if (!android::base::ReadFullyAtOffset(fd, buffer.get(), VBMETA_IMAGE_MAX_SIZE, offset)) {
+        return ErrnoError() << "Couldn't read vbmeta image at offset " << offset;
+    }
+    return std::string(reinterpret_cast<char*>(buffer.get()), VBMETA_IMAGE_MAX_SIZE);
+}
+
+Result<void> ValidateVBMetaImage(int super_vbmeta_fd, int vbmeta_index,
+                                 const std::string& vbmeta_image) {
+    Result<std::string> content = ReadVBMetaImage(super_vbmeta_fd, vbmeta_index);
+    if (!content) {
+        return content.error();
+    }
+
+    if (vbmeta_image != content.value()) {
+        return Error() << "VBMeta Image in Super VBMeta differ from the original one.";
+    }
+    return {};
+}
+
+}  // namespace fs_mgr
+}  // namespace android
diff --git a/fs_mgr/libvbmeta/reader.h b/fs_mgr/libvbmeta/reader.h
new file mode 100644
index 0000000..f0997ff
--- /dev/null
+++ b/fs_mgr/libvbmeta/reader.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <android-base/result.h>
+
+#include "super_vbmeta_format.h"
+
+namespace android {
+namespace fs_mgr {
+
+android::base::Result<void> ReadPrimaryVBMetaTable(int fd, VBMetaTable* table);
+android::base::Result<void> ReadBackupVBMetaTable(int fd, VBMetaTable* table);
+android::base::Result<std::string> ReadVBMetaImage(int fd, int slot);
+
+android::base::Result<void> ValidateVBMetaImage(int super_vbmeta_fd, int vbmeta_index,
+                                                const std::string& vbmeta_image);
+
+}  // namespace fs_mgr
+}  // namespace android
\ No newline at end of file
diff --git a/libnativeloader/utils.h b/fs_mgr/libvbmeta/super_vbmeta_format.h
similarity index 60%
copy from libnativeloader/utils.h
copy to fs_mgr/libvbmeta/super_vbmeta_format.h
index a1c2be5..c62a2dd 100644
--- a/libnativeloader/utils.h
+++ b/fs_mgr/libvbmeta/super_vbmeta_format.h
@@ -13,14 +13,22 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
+/* This .h file is intended for CPP clients (usually fastbootd, recovery and update_engine)  */
+
 #pragma once
 
-namespace android::nativeloader {
+#include <string>
+#include <vector>
 
-#if defined(__LP64__)
-#define LIB "lib64"
-#else
-#define LIB "lib"
-#endif
+#include "super_vbmeta_format_c.h"
 
-}  // namespace android::nativeloader
+struct InternalVBMetaDescriptor : VBMetaDescriptor {
+    /*  64: The vbmeta image's name */
+    std::string vbmeta_name;
+};
+
+struct VBMetaTable {
+    SuperVBMetaHeader header;
+    std::vector<InternalVBMetaDescriptor> descriptors;
+};
\ No newline at end of file
diff --git a/fs_mgr/libvbmeta/super_vbmeta_format_c.h b/fs_mgr/libvbmeta/super_vbmeta_format_c.h
new file mode 100644
index 0000000..6d79801
--- /dev/null
+++ b/fs_mgr/libvbmeta/super_vbmeta_format_c.h
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* This .h file is intended for C clients (usually bootloader).  */
+
+#pragma once
+
+#include <stdint.h>
+
+/* Magic signature for super vbmeta. */
+#define SUPER_VBMETA_MAGIC 0x5356424d
+
+/* Current super vbmeta version. */
+#define SUPER_VBMETA_MAJOR_VERSION 1
+#define SUPER_VBMETA_MINOR_VERSION 0
+
+/* super vbmeta size. */
+#define SUPER_VBMETA_HEADER_SIZE sizeof(SuperVBMetaHeader)
+#define SUPER_VBMETA_DESCRIPTOR_SIZE sizeof(VBMetaDescriptor)
+#define SUPER_VBMETA_TABLE_MAX_SIZE 2048
+
+/* super vbmeta offset. */
+#define PRIMARY_SUPER_VBMETA_TABLE_OFFSET 0
+#define BACKUP_SUPER_VBMETA_TABLE_OFFSET SUPER_VBMETA_TABLE_MAX_SIZE
+
+/* restriction of vbmeta image */
+#define VBMETA_IMAGE_MAX_NUM 32
+#define VBMETA_IMAGE_MAX_SIZE 64 * 1024
+
+/* Binary format of the super vbmeta image.
+ *
+ * The super vbmeta image consists of two blocks:
+ *
+ *  +------------------------------------------+
+ *  | Super VBMeta Table - fixed size          |
+ *  +------------------------------------------+
+ *  | Backup Super VBMeta Table - fixed size   |
+ *  +------------------------------------------+
+ *  | VBMeta Images - fixed size               |
+ *  +------------------------------------------+
+ *
+ *  The "Super VBMeta Table" records the offset
+ *  and the size of each vbmeta_partition within
+ *  /super_vbmeta.
+ *
+ *  The "VBMeta Image" is copied from each vbmeta_partition
+ *  and filled with 0 until 64K bytes.
+ *
+ * The super vbmeta table consists of two blocks:
+ *
+ *  +-----------------------------------------+
+ *  | Header data - fixed size                |
+ *  +-----------------------------------------+
+ *  | VBMeta descriptors - variable size      |
+ *  +-----------------------------------------+
+ *
+ * The "Header data" block is described by the following struct and
+ * is always 128 bytes long.
+ *
+ * The "VBMeta descriptor" is |descriptors_size| + |vbmeta_name_length|
+ * bytes long. It contains the offset and size for each vbmeta image
+ * and is followed by |vbmeta_name_length| bytes of the partition name
+ * (UTF-8 encoded).
+ */
+
+typedef struct SuperVBMetaHeader {
+    /*  0: Magic signature (SUPER_VBMETA_MAGIC). */
+    uint32_t magic;
+
+    /*  4: Major version. Version number required to read this super vbmeta. If the version is not
+     * equal to the library version, the super vbmeta should be considered incompatible.
+     */
+    uint16_t major_version;
+
+    /*  6: Minor version. A library supporting newer features should be able to
+     * read super vbmeta with an older minor version. However, an older library
+     * should not support reading super vbmeta if its minor version is higher.
+     */
+    uint16_t minor_version;
+
+    /*  8: The size of this header struct. */
+    uint32_t header_size;
+
+    /*  12: The size of this super vbmeta table. */
+    uint32_t total_size;
+
+    /*  16: SHA256 checksum of this super vbmeta table, with this field set to 0. */
+    uint8_t checksum[32];
+
+    /*  48: The size of the vbmeta table descriptors. */
+    uint32_t descriptors_size;
+
+    /*  52: mark which slot is in use. */
+    uint32_t in_use = 0;
+
+    /*  56: reserved for other usage, filled with 0. */
+    uint8_t reserved[72];
+} __attribute__((packed)) SuperVBMetaHeader;
+
+typedef struct VBMetaDescriptor {
+    /*  0: The slot number of the vbmeta image. */
+    uint8_t vbmeta_index;
+
+    /*  12: The length of the vbmeta image name. */
+    uint32_t vbmeta_name_length;
+
+    /*  16: Space reserved for other usage, filled with 0. */
+    uint8_t reserved[48];
+} __attribute__((packed)) VBMetaDescriptor;
\ No newline at end of file
diff --git a/fs_mgr/libvbmeta/super_vbmeta_test.cpp b/fs_mgr/libvbmeta/super_vbmeta_test.cpp
new file mode 100644
index 0000000..6b4fc5d
--- /dev/null
+++ b/fs_mgr/libvbmeta/super_vbmeta_test.cpp
@@ -0,0 +1,191 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <android-base/file.h>
+#include <gtest/gtest.h>
+#include <openssl/sha.h>
+#include <sparse/sparse.h>
+
+#include "reader.h"
+#include "super_vbmeta_format.h"
+#include "utility.h"
+#include "writer.h"
+
+#define FAKE_DATA_SIZE 40960
+#define FAKE_PARTITION_SIZE FAKE_DATA_SIZE * 25
+
+using android::base::Result;
+using android::fs_mgr::GetFileSize;
+using android::fs_mgr::ReadVBMetaImage;
+using SparsePtr = std::unique_ptr<sparse_file, decltype(&sparse_file_destroy)>;
+
+void GeneratePartitionImage(int fd, const std::string& file_name,
+                            const std::string& partition_name) {
+    std::unique_ptr<uint8_t[]> buffer = std::make_unique<uint8_t[]>(FAKE_DATA_SIZE);
+    for (size_t c = 0; c < FAKE_DATA_SIZE; c++) {
+        buffer[c] = uint8_t(c);
+    }
+
+    SparsePtr file(sparse_file_new(512 /* block size */, FAKE_DATA_SIZE), sparse_file_destroy);
+    EXPECT_TRUE(file);
+    EXPECT_EQ(0, sparse_file_add_data(file.get(), buffer.get(), FAKE_DATA_SIZE,
+                                      0 /* offset in blocks */));
+    EXPECT_EQ(0, sparse_file_write(file.get(), fd, false /* gz */, true /* sparse */,
+                                   false /* crc */));
+
+    std::stringstream cmd;
+    cmd << "avbtool add_hashtree_footer"
+        << " --image " << file_name << " --partition_name " << partition_name
+        << " --partition_size " << FAKE_PARTITION_SIZE << " --algorithm SHA256_RSA2048"
+        << " --key external/avb/test/data/testkey_rsa2048.pem";
+
+    int rc = system(cmd.str().c_str());
+    EXPECT_TRUE(WIFEXITED(rc));
+    EXPECT_EQ(WEXITSTATUS(rc), 0);
+}
+
+void GenerateVBMetaImage(const std::string& vbmeta_file_name,
+                         const std::string& include_file_name) {
+    std::stringstream cmd;
+    cmd << "avbtool make_vbmeta_image"
+        << " --output " << vbmeta_file_name << " --include_descriptors_from_image "
+        << include_file_name;
+
+    int rc = system(cmd.str().c_str());
+    EXPECT_TRUE(WIFEXITED(rc));
+    EXPECT_EQ(WEXITSTATUS(rc), 0);
+}
+
+std::string ReadVBMetaImageFromFile(const std::string& file) {
+    android::base::unique_fd fd(open(file.c_str(), O_RDONLY | O_CLOEXEC));
+    EXPECT_GT(fd, 0);
+    Result<uint64_t> file_size = GetFileSize(fd);
+    EXPECT_TRUE(file_size);
+    std::unique_ptr<uint8_t[]> buffer = std::make_unique<uint8_t[]>(VBMETA_IMAGE_MAX_SIZE);
+    EXPECT_TRUE(android::base::ReadFully(fd, buffer.get(), file_size.value()));
+    return std::string(reinterpret_cast<char*>(buffer.get()), VBMETA_IMAGE_MAX_SIZE);
+}
+
+TEST(VBMetaTableTest, VBMetaTableBasic) {
+    TemporaryDir td;
+
+    // Generate Partition Image
+    TemporaryFile system_tf(std::string(td.path));
+    std::string system_path(system_tf.path);
+    GeneratePartitionImage(system_tf.fd, system_path, "system");
+    system_tf.release();
+
+    TemporaryFile vendor_tf(std::string(td.path));
+    std::string vendor_path(vendor_tf.path);
+    GeneratePartitionImage(vendor_tf.fd, vendor_path, "vendor");
+    vendor_tf.release();
+
+    TemporaryFile product_tf(std::string(td.path));
+    std::string product_path(product_tf.path);
+    GeneratePartitionImage(product_tf.fd, product_path, "product");
+    product_tf.release();
+
+    // Generate VBMeta Image
+    std::string vbmeta_system_path(td.path);
+    vbmeta_system_path.append("/vbmeta_system.img");
+    GenerateVBMetaImage(vbmeta_system_path, system_path);
+
+    std::string vbmeta_vendor_path(td.path);
+    vbmeta_vendor_path.append("/vbmeta_vendor.img");
+    GenerateVBMetaImage(vbmeta_vendor_path, vendor_path);
+
+    std::string vbmeta_product_path(td.path);
+    vbmeta_product_path.append("/vbmeta_product.img");
+    GenerateVBMetaImage(vbmeta_product_path, product_path);
+
+    // Generate Super VBMeta Image
+    std::string super_vbmeta_path(td.path);
+    super_vbmeta_path.append("/super_vbmeta.img");
+
+    std::stringstream cmd;
+    cmd << "vbmake"
+        << " --image "
+        << "vbmeta_system"
+        << "=" << vbmeta_system_path << " --image "
+        << "vbmeta_vendor"
+        << "=" << vbmeta_vendor_path << " --image "
+        << "vbmeta_product"
+        << "=" << vbmeta_product_path << " --output=" << super_vbmeta_path;
+
+    int rc = system(cmd.str().c_str());
+    ASSERT_TRUE(WIFEXITED(rc));
+    ASSERT_EQ(WEXITSTATUS(rc), 0);
+
+    android::base::unique_fd fd(open(super_vbmeta_path.c_str(), O_RDONLY | O_CLOEXEC));
+    EXPECT_GT(fd, 0);
+
+    // Check the size of vbmeta table
+    Result<uint64_t> super_vbmeta_size = GetFileSize(fd);
+    EXPECT_TRUE(super_vbmeta_size);
+    EXPECT_EQ(super_vbmeta_size.value(),
+              SUPER_VBMETA_TABLE_MAX_SIZE * 2 + VBMETA_IMAGE_MAX_SIZE * 3);
+
+    // Check Primary vbmeta table is equal to Backup one
+    VBMetaTable table;
+    EXPECT_TRUE(android::fs_mgr::ReadPrimaryVBMetaTable(fd, &table));
+    VBMetaTable table_backup;
+    EXPECT_TRUE(android::fs_mgr::ReadBackupVBMetaTable(fd, &table_backup));
+    EXPECT_EQ(android::fs_mgr::SerializeVBMetaTable(table),
+              android::fs_mgr::SerializeVBMetaTable(table_backup));
+
+    // Check vbmeta table Header Checksum
+    std::string serial_table = android::fs_mgr::SerializeVBMetaTable(table);
+    std::string serial_removed_checksum(serial_table);
+    // Replace checksum 32 bytes (starts at 16th byte) with 0
+    serial_removed_checksum.replace(16, 32, 32, 0);
+    uint8_t test_checksum[32];
+    ::SHA256(reinterpret_cast<const uint8_t*>(serial_removed_checksum.c_str()),
+             table.header.total_size, &test_checksum[0]);
+    EXPECT_EQ(memcmp(table.header.checksum, test_checksum, 32), 0);
+
+    // Check vbmeta table descriptors and vbmeta images
+    EXPECT_EQ(table.descriptors.size(), 3);
+
+    EXPECT_EQ(table.descriptors[0].vbmeta_index, 0);
+    EXPECT_EQ(table.descriptors[0].vbmeta_name_length, 14);
+    EXPECT_EQ(table.descriptors[0].vbmeta_name, "vbmeta_product");
+    Result<std::string> vbmeta_product_content = ReadVBMetaImage(fd, 0);
+    EXPECT_TRUE(vbmeta_product_content);
+    EXPECT_EQ(ReadVBMetaImageFromFile(vbmeta_product_path), vbmeta_product_content.value());
+
+    EXPECT_EQ(table.descriptors[1].vbmeta_index, 1);
+    EXPECT_EQ(table.descriptors[1].vbmeta_name_length, 13);
+    EXPECT_EQ(table.descriptors[1].vbmeta_name, "vbmeta_system");
+    Result<std::string> vbmeta_system_content = ReadVBMetaImage(fd, 1);
+    EXPECT_TRUE(vbmeta_system_content);
+    EXPECT_EQ(ReadVBMetaImageFromFile(vbmeta_system_path), vbmeta_system_content.value());
+
+    EXPECT_EQ(table.descriptors[2].vbmeta_index, 2);
+    EXPECT_EQ(table.descriptors[2].vbmeta_name_length, 13);
+    EXPECT_EQ(table.descriptors[2].vbmeta_name, "vbmeta_vendor");
+    Result<std::string> vbmeta_vendor_content = ReadVBMetaImage(fd, 2);
+    EXPECT_TRUE(vbmeta_vendor_content);
+    EXPECT_EQ(ReadVBMetaImageFromFile(vbmeta_vendor_path), vbmeta_vendor_content.value());
+}
+
+int main(int argc, char** argv) {
+    ::testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+}
\ No newline at end of file
diff --git a/fs_mgr/libvbmeta/utility.cpp b/fs_mgr/libvbmeta/utility.cpp
new file mode 100644
index 0000000..c184227
--- /dev/null
+++ b/fs_mgr/libvbmeta/utility.cpp
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "utility.h"
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "super_vbmeta_format.h"
+
+using android::base::ErrnoError;
+using android::base::Error;
+using android::base::Result;
+
+namespace android {
+namespace fs_mgr {
+
+Result<uint64_t> GetFileSize(int fd) {
+    struct stat sb;
+    if (fstat(fd, &sb) == -1) {
+        return ErrnoError() << "Couldn't get the file size";
+    }
+    return sb.st_size;
+}
+
+uint64_t IndexOffset(const uint8_t vbmeta_index) {
+    /* There are primary and backup vbmeta table in super_vbmeta,
+       so SUPER_VBMETA_TABLE_MAX_SIZE is counted twice. */
+    return 2 * SUPER_VBMETA_TABLE_MAX_SIZE + vbmeta_index * VBMETA_IMAGE_MAX_SIZE;
+}
+
+}  // namespace fs_mgr
+}  // namespace android
diff --git a/fs_mgr/libvbmeta/utility.h b/fs_mgr/libvbmeta/utility.h
new file mode 100644
index 0000000..91db0ad
--- /dev/null
+++ b/fs_mgr/libvbmeta/utility.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <android-base/logging.h>
+#include <android-base/result.h>
+
+#define VBMETA_TAG "[libvbmeta]"
+#define LWARN LOG(WARNING) << VBMETA_TAG
+#define LINFO LOG(INFO) << VBMETA_TAG
+#define LERROR LOG(ERROR) << VBMETA_TAG
+#define PWARNING PLOG(WARNING) << VBMETA_TAG
+#define PERROR PLOG(ERROR) << VBMETA_TAG
+
+namespace android {
+namespace fs_mgr {
+
+android::base::Result<uint64_t> GetFileSize(int fd);
+
+uint64_t IndexOffset(const uint8_t vbmeta_index);
+
+}  // namespace fs_mgr
+}  // namespace android
\ No newline at end of file
diff --git a/fs_mgr/libvbmeta/writer.cpp b/fs_mgr/libvbmeta/writer.cpp
new file mode 100644
index 0000000..fc0e0fb
--- /dev/null
+++ b/fs_mgr/libvbmeta/writer.cpp
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "writer.h"
+
+#include <android-base/file.h>
+
+#include "utility.h"
+
+using android::base::ErrnoError;
+using android::base::Result;
+
+namespace android {
+namespace fs_mgr {
+
+std::string SerializeVBMetaTable(const VBMetaTable& input) {
+    std::string table;
+    table.append(reinterpret_cast<const char*>(&input.header), SUPER_VBMETA_HEADER_SIZE);
+
+    for (const auto& desc : input.descriptors) {
+        table.append(reinterpret_cast<const char*>(&desc), SUPER_VBMETA_DESCRIPTOR_SIZE);
+        table.append(desc.vbmeta_name);
+    }
+
+    // Ensure the size of vbmeta table is SUPER_VBMETA_TABLE_MAX_SIZE
+    table.resize(SUPER_VBMETA_TABLE_MAX_SIZE, '\0');
+
+    return table;
+}
+
+Result<void> WritePrimaryVBMetaTable(int fd, const std::string& table) {
+    const uint64_t offset = PRIMARY_SUPER_VBMETA_TABLE_OFFSET;
+    if (lseek(fd, offset, SEEK_SET) < 0) {
+        return ErrnoError() << __PRETTY_FUNCTION__ << " lseek failed";
+    }
+
+    if (!android::base::WriteFully(fd, table.data(), table.size())) {
+        return ErrnoError() << "Failed to write primary vbmeta table at offset " << offset;
+    }
+    return {};
+}
+
+Result<void> WriteBackupVBMetaTable(int fd, const std::string& table) {
+    const uint64_t offset = BACKUP_SUPER_VBMETA_TABLE_OFFSET;
+    if (lseek(fd, offset, SEEK_SET) < 0) {
+        return ErrnoError() << __PRETTY_FUNCTION__ << " lseek failed";
+    }
+
+    if (!android::base::WriteFully(fd, table.data(), table.size())) {
+        return ErrnoError() << "Failed to write backup vbmeta table at offset " << offset;
+    }
+    return {};
+}
+
+Result<void> WriteVBMetaImage(int fd, const uint8_t slot_number, const std::string& vbmeta_image) {
+    const uint64_t offset = IndexOffset(slot_number);
+    if (lseek(fd, offset, SEEK_SET) < 0) {
+        return ErrnoError() << __PRETTY_FUNCTION__ << " lseek failed";
+    }
+
+    if (!android::base::WriteFully(fd, vbmeta_image.data(), vbmeta_image.size())) {
+        return ErrnoError() << "Failed to write vbmeta image at offset " << offset;
+    }
+    return {};
+}
+
+}  // namespace fs_mgr
+}  // namespace android
\ No newline at end of file
diff --git a/fs_mgr/libvbmeta/writer.h b/fs_mgr/libvbmeta/writer.h
new file mode 100644
index 0000000..f8eed36
--- /dev/null
+++ b/fs_mgr/libvbmeta/writer.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <string>
+
+#include <android-base/result.h>
+
+#include "super_vbmeta_format.h"
+
+namespace android {
+namespace fs_mgr {
+
+std::string SerializeVBMetaTable(const VBMetaTable& input);
+
+android::base::Result<void> WritePrimaryVBMetaTable(int fd, const std::string& table);
+android::base::Result<void> WriteBackupVBMetaTable(int fd, const std::string& table);
+android::base::Result<void> WriteVBMetaImage(int fd, const uint8_t slot_number,
+                                             const std::string& vbmeta_image);
+
+}  // namespace fs_mgr
+}  // namespace android
\ No newline at end of file
diff --git a/fs_mgr/tests/Android.bp b/fs_mgr/tests/Android.bp
index 83668e9..4f6ec5a 100644
--- a/fs_mgr/tests/Android.bp
+++ b/fs_mgr/tests/Android.bp
@@ -13,8 +13,21 @@
 // limitations under the License.
 
 cc_test {
-    name: "fs_mgr_unit_test",
-    test_suites: ["device-tests"],
+    name: "CtsFsMgrTestCases",
+    test_suites: [
+        "cts",
+        "device-tests",
+        "vts",
+    ],
+    compile_multilib: "both",
+    multilib: {
+        lib32: {
+            suffix: "32",
+        },
+        lib64: {
+            suffix: "64",
+        },
+    },
 
     shared_libs: [
         "libbase",
diff --git a/fs_mgr/tests/AndroidTest.xml b/fs_mgr/tests/AndroidTest.xml
new file mode 100644
index 0000000..91c3fb9
--- /dev/null
+++ b/fs_mgr/tests/AndroidTest.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2019 The Android Open Source Project
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+          http://www.apache.org/licenses/LICENSE-2.0
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<configuration description="Config for CTS fs_mgr test cases">
+    <option name="test-suite-tag" value="cts" />
+    <option name="config-descriptor:metadata" key="component" value="systems" />
+    <option name="config-descriptor:metadata" key="parameter" value="not_instant_app" />
+    <option name="config-descriptor:metadata" key="parameter" value="multi_abi" />
+    <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
+        <option name="cleanup" value="true" />
+        <option name="push" value="CtsFsMgrTestCases->/data/local/tmp/CtsFsMgrTestCases" />
+        <option name="append-bitness" value="true" />
+    </target_preparer>
+    <test class="com.android.tradefed.testtype.GTest" >
+        <option name="native-test-device-path" value="/data/local/tmp" />
+        <option name="module-name" value="CtsFsMgrTestCases" />
+        <option name="runtime-hint" value="65s" />
+    </test>
+</configuration>
diff --git a/fs_mgr/tests/adb-remount-test.sh b/fs_mgr/tests/adb-remount-test.sh
index 642f2c1..4226e95 100755
--- a/fs_mgr/tests/adb-remount-test.sh
+++ b/fs_mgr/tests/adb-remount-test.sh
@@ -38,6 +38,8 @@
 
 EMPTY=""
 SPACE=" "
+# Line up wrap to [  XXXXXXX ] messages.
+INDENT="             "
 # A _real_ embedded tab character
 TAB="`echo | tr '\n' '\t'`"
 # A _real_ embedded escape character
@@ -159,8 +161,7 @@
     return
   fi
   echo "${ORANGE}[  WARNING ]${NORMAL} unlabeled sepolicy violations:" >&2
-  echo "${L}" |
-    sed 's/^/             /' >&2
+  echo "${L}" | sed "s/^/${INDENT}/" >&2
 }
 
 [ "USAGE: get_property <prop>
@@ -639,10 +640,10 @@
 *}" ]; then
       echo "${prefix} expected \"${lval}\""
       echo "${prefix} got \"${rval}\"" |
-        sed ': again
+        sed ": again
              N
-             s/\(\n\)\([^ ]\)/\1             \2/
-             t again'
+             s/\(\n\)\([^ ]\)/\1${INDENT}\2/
+             t again"
       if [ -n "${*}" ] ; then
         echo "${prefix} ${*}"
       fi
@@ -657,10 +658,10 @@
       if [ `echo ${lval}${rval}${*} | wc -c` -gt 60 -o "${rval}" != "${rval% *}" ]; then
         echo "${prefix} ok \"${lval}\""
         echo "       = \"${rval}\"" |
-          sed ': again
+          sed ": again
                N
-               s/\(\n\)\([^ ]\)/\1          \2/
-               t again'
+               s/\(\n\)\([^ ]\)/\1${INDENT}\2/
+               t again"
         if [ -n "${*}" ] ; then
           echo "${prefix} ${*}"
         fi
@@ -709,8 +710,9 @@
       EXPECT_EQ "${lval}" "${rval}" ${*}
       return
   fi
-  EXPECT_EQ "${lval}" "${rval}" ||
+  if ! EXPECT_EQ "${lval}" "${rval}"; then
     die "${@}"
+  fi
 }
 
 [ "USAGE: check_ne <lval> <rval> [--warning [message]]
@@ -724,8 +726,9 @@
       EXPECT_NE "${lval}" "${rval}" ${*}
       return
   fi
-  EXPECT_NE "${lval}" "${rval}" ||
+  if ! EXPECT_NE "${lval}" "${rval}"; then
     die "${@}"
+  fi
 }
 
 [ "USAGE: skip_administrative_mounts [data] < /proc/mounts
@@ -847,6 +850,8 @@
 
 # Do something.
 
+# Collect characteristics of the device and report.
+
 D=`get_property ro.serialno`
 [ -n "${D}" ] || D=`get_property ro.boot.serialno`
 [ -z "${D}" -o -n "${ANDROID_SERIAL}" ] || ANDROID_SERIAL=${D}
@@ -869,35 +874,78 @@
 [ -z "${ACTIVE_SLOT}" ] ||
   echo "${BLUE}[     INFO ]${NORMAL} active slot is ${ACTIVE_SLOT}" >&2
 
+# Acquire list of system partitions
+
+PARTITIONS=`adb_su cat /vendor/etc/fstab* |
+              skip_administrative_mounts |
+              sed -n "s@^\([^ ${TAB}/][^ ${TAB}/]*\)[ ${TAB}].*[, ${TAB}]ro[, ${TAB}].*@\1@p" |
+              sort -u |
+              tr '\n' ' '`
+PARTITIONS="${PARTITIONS:-system vendor}"
+# KISS (we do not support sub-mounts for system partitions currently)
+MOUNTS="`for i in ${PARTITIONS}; do
+           echo /${i}
+         done |
+         tr '\n' ' '`"
+echo "${BLUE}[     INFO ]${NORMAL} System Partitions list: ${PARTITIONS}" >&2
+
 # Report existing partition sizes
-adb_sh ls -l /dev/block/by-name/ </dev/null 2>/dev/null |
+adb_sh ls -l /dev/block/by-name/ /dev/block/mapper/ </dev/null 2>/dev/null |
   sed -n 's@.* \([^ ]*\) -> /dev/block/\([^ ]*\)$@\1 \2@p' |
   while read name device; do
-    case ${name} in
-      system_[ab] | system | vendor_[ab] | vendor | super | cache)
-        case ${device} in
-          sd*)
-            device=${device%%[0-9]*}/${device}
-            ;;
-        esac
-        size=`adb_su cat /sys/block/${device}/size 2>/dev/null </dev/null` &&
-          size=`expr ${size} / 2` &&
-          echo "${BLUE}[     INFO ]${NORMAL} partition ${name} device ${device} size ${size}K" >&2
+    [ super = ${name} -o cache = ${name} ] ||
+      (
+        for i in ${PARTITIONS}; do
+          [ ${i} = ${name} -o ${i} = ${name%_[ab]} ] && exit
+        done
+        exit 1
+      ) ||
+      continue
+
+    case ${device} in
+      sd*)
+        device=${device%%[0-9]*}/${device}
         ;;
     esac
+    size=`adb_su cat /sys/block/${device}/size 2>/dev/null </dev/null` &&
+      size=`expr ${size} / 2` &&
+      echo "${BLUE}[     INFO ]${NORMAL} partition ${name} device ${device} size ${size}K" >&2
   done
 
 # If reboot too soon after fresh flash, could trip device update failure logic
 wait_for_screen
 # Can we test remount -R command?
+OVERLAYFS_BACKING="cache mnt/scratch"
 overlayfs_supported=true
-if [ "orange" = "`get_property ro.boot.verifiedbootstate`" -a \
-     "2" = "`get_property partition.system.verified`" ]; then
+if [ "orange" != "`get_property ro.boot.verifiedbootstate`" -o \
+     "2" != "`get_property partition.system.verified`" ]; then
   restore() {
     ${overlayfs_supported} || return 0
     inFastboot &&
       fastboot reboot &&
-      adb_wait ${ADB_WAIT}
+      adb_wait ${ADB_WAIT} ||
+      true
+    if inAdb; then
+      reboot=false
+      for d in ${OVERLAYFS_BACKING}; do
+        if adb_su ls -d /${d}/overlay </dev/null >/dev/null 2>/dev/null; then
+          adb_su rm -rf /${d}/overlay </dev/null
+          reboot=true
+        fi
+      done
+      if ${reboot}; then
+        adb_reboot &&
+        adb_wait ${ADB_WAIT}
+      fi
+    fi
+  }
+else
+  restore() {
+    ${overlayfs_supported} || return 0
+    inFastboot &&
+      fastboot reboot &&
+      adb_wait ${ADB_WAIT} ||
+      true
     inAdb &&
       adb_root &&
       adb enable-verity >/dev/null 2>/dev/null &&
@@ -908,13 +956,24 @@
   echo "${GREEN}[ RUN      ]${NORMAL} Testing adb shell su root remount -R command" >&2
 
   avc_check
-  adb_su remount -R system </dev/null || true
+  T=`adb_date`
+  adb_su remount -R system </dev/null
+  err=${?}
+  if [ "${err}" != 0 ]; then
+    echo "${ORANGE}[  WARNING ]${NORMAL} adb shell su root remount -R system = ${err}, likely did not reboot!" >&2
+    T="-t ${T}"
+  else
+    # Rebooted, logcat will be meaningless, and last logcat will likely be clear
+    T=""
+  fi
   sleep 2
   adb_wait ${ADB_WAIT} ||
-    die "waiting for device after remount -R `usb_status`"
+    die "waiting for device after adb shell su root remount -R system `usb_status`"
   if [ "orange" != "`get_property ro.boot.verifiedbootstate`" -o \
        "2" = "`get_property partition.system.verified`" ]; then
-    die "remount -R command failed"
+    die ${T} "remount -R command failed
+${INDENT}ro.boot.verifiedbootstate=\"`get_property ro.boot.verifiedbootstate`\"
+${INDENT}partition.system.verified=\"`get_property partition.system.verified`\""
   fi
 
   echo "${GREEN}[       OK ]${NORMAL} adb shell su root remount -R command" >&2
@@ -956,7 +1015,6 @@
 # So lets do our best to surgically wipe the overlayfs state without
 # having to go through enable-verity transition.
 reboot=false
-OVERLAYFS_BACKING="cache mnt/scratch"
 for d in ${OVERLAYFS_BACKING}; do
   if adb_sh ls -d /${d}/overlay </dev/null >/dev/null 2>/dev/null; then
     echo "${ORANGE}[  WARNING ]${NORMAL} /${d}/overlay is setup, surgically wiping" >&2
@@ -1085,7 +1143,7 @@
 
 # Feed log with selinux denials as baseline before overlays
 adb_unroot
-adb_sh find /system /vendor </dev/null >/dev/null 2>/dev/null
+adb_sh find ${MOUNTS} </dev/null >/dev/null 2>/dev/null
 adb_root
 
 D=`adb remount 2>&1`
@@ -1144,6 +1202,11 @@
     skip_unrelated_mounts |
     grep " overlay ro,") ||
     die "remount overlayfs missed a spot (ro)"
+  !(adb_sh grep -v noatime /proc/mounts </dev/null |
+    skip_administrative_mounts data |
+    skip_unrelated_mounts |
+    grep -v ' ro,') ||
+    die "mounts are not noatime"
   D=`adb_sh grep " rw," /proc/mounts </dev/null |
      skip_administrative_mounts data`
   if echo "${D}" | grep /dev/root >/dev/null; then
@@ -1177,21 +1240,19 @@
 
 # Check something.
 
-echo "${GREEN}[ RUN      ]${NORMAL} push content to /system and /vendor" >&2
+echo "${GREEN}[ RUN      ]${NORMAL} push content to ${MOUNTS}" >&2
 
 A="Hello World! $(date)"
-echo "${A}" | adb_sh cat - ">/system/hello"
+for i in ${MOUNTS}; do
+  echo "${A}" | adb_sh cat - ">${i}/hello"
+  B="`adb_cat ${i}/hello`" ||
+    die "${i#/} hello"
+  check_eq "${A}" "${B}" ${i} before reboot
+done
 echo "${A}" | adb_sh cat - ">/system/priv-app/hello"
-echo "${A}" | adb_sh cat - ">/vendor/hello"
-B="`adb_cat /system/hello`" ||
-  die "system hello"
-check_eq "${A}" "${B}" /system before reboot
 B="`adb_cat /system/priv-app/hello`" ||
   die "system priv-app hello"
 check_eq "${A}" "${B}" /system/priv-app before reboot
-B="`adb_cat /vendor/hello`" ||
-  die "vendor hello"
-check_eq "${A}" "${B}" /vendor before reboot
 SYSTEM_DEVT=`adb_sh stat --format=%D /system/hello </dev/null`
 VENDOR_DEVT=`adb_sh stat --format=%D /vendor/hello </dev/null`
 SYSTEM_INO=`adb_sh stat --format=%i /system/hello </dev/null`
@@ -1266,24 +1327,23 @@
   echo "${GREEN}[       OK ]${NORMAL} /vendor content correct MAC after reboot" >&2
   # Feed unprivileged log with selinux denials as a result of overlays
   wait_for_screen
-  adb_sh find /system /vendor </dev/null >/dev/null 2>/dev/null
+  adb_sh find ${MOUNTS} </dev/null >/dev/null 2>/dev/null
 fi
-B="`adb_cat /system/hello`"
-check_eq "${A}" "${B}" /system after reboot
 # If overlayfs has a nested security problem, this will fail.
 B="`adb_ls /system/`" ||
-  dir "adb ls /system"
+  die "adb ls /system"
 [ X"${B}" != X"${B#*priv-app}" ] ||
-  dir "adb ls /system/priv-app"
+  die "adb ls /system/priv-app"
 B="`adb_cat /system/priv-app/hello`"
 check_eq "${A}" "${B}" /system/priv-app after reboot
-echo "${GREEN}[       OK ]${NORMAL} /system content remains after reboot" >&2
 # Only root can read vendor if sepolicy permissions are as expected.
 adb_root ||
   die "adb root"
-B="`adb_cat /vendor/hello`"
-check_eq "${A}" "${B}" vendor after reboot
-echo "${GREEN}[       OK ]${NORMAL} /vendor content remains after reboot" >&2
+for i in ${MOUNTS}; do
+  B="`adb_cat ${i}/hello`"
+  check_eq "${A}" "${B}" ${i#/} after reboot
+  echo "${GREEN}[       OK ]${NORMAL} ${i} content remains after reboot" >&2
+done
 
 check_eq "${SYSTEM_DEVT}" "`adb_sh stat --format=%D /system/hello </dev/null`" system devt after reboot
 check_eq "${VENDOR_DEVT}" "`adb_sh stat --format=%D /vendor/hello </dev/null`" vendor devt after reboot
@@ -1294,7 +1354,7 @@
 check_eq "${BASE_SYSTEM_DEVT}" "`adb_sh stat --format=%D /system/xbin/su </dev/null`" devt for su after reboot
 
 # Feed log with selinux denials as a result of overlays
-adb_sh find /system /vendor </dev/null >/dev/null 2>/dev/null
+adb_sh find ${MOUNTS} </dev/null >/dev/null 2>/dev/null
 
 # Check if the updated libc.so is persistent after reboot.
 adb_root &&
@@ -1399,9 +1459,9 @@
   B="`adb_cat /system/hello`"
   check_eq "${A}" "${B}" system after flash vendor
   B="`adb_ls /system/`" ||
-    dir "adb ls /system"
+    die "adb ls /system"
   [ X"${B}" != X"${B#*priv-app}" ] ||
-    dir "adb ls /system/priv-app"
+    die "adb ls /system/priv-app"
   B="`adb_cat /system/priv-app/hello`"
   check_eq "${A}" "${B}" system/priv-app after flash vendor
   adb_root ||
@@ -1454,6 +1514,9 @@
 check_eq "cat: /system/priv-app/hello: No such file or directory" "${B}" after rm
 B="`adb_cat /vendor/hello`"
 check_eq "cat: /vendor/hello: No such file or directory" "${B}" after rm
+for i in ${MOUNTS}; do
+  adb_sh rm ${i}/hello </dev/null 2>/dev/null || true
+done
 
 if ${is_bootloader_fastboot} && [ -n "${scratch_partition}" ]; then
 
@@ -1468,7 +1531,7 @@
   }
   dd if=/dev/zero of=${img} bs=4096 count=16 2>/dev/null &&
     fastboot_wait ${FASTBOOT_WAIT} ||
-    die "reboot into fastboot `usb_status`"
+    die "reboot into fastboot to flash scratch `usb_status`"
   fastboot flash --force ${scratch_partition} ${img}
   err=${?}
   cleanup
@@ -1592,15 +1655,24 @@
 if ${overlayfs_supported}; then
   echo "${GREEN}[ RUN      ]${NORMAL} test 'adb remount -R'" >&2
   avc_check
-  adb_root &&
-    adb remount -R &&
-    adb_wait ${ADB_WAIT} ||
-    die "adb remount -R"
+  adb_root ||
+    die "adb root in preparation for adb remount -R"
+  T=`adb_date`
+  adb remount -R
+  err=${?}
+  if [ "${err}" != 0 ]; then
+    die -t ${T} "adb remount -R = ${err}"
+  fi
+  sleep 2
+  adb_wait ${ADB_WAIT} ||
+    die "waiting for device after adb remount -R `usb_status`"
   if [ "orange" != "`get_property ro.boot.verifiedbootstate`" -o \
        "2" = "`get_property partition.system.verified`" ] &&
      [ -n "`get_property ro.boot.verifiedbootstate`" -o \
        -n "`get_property partition.system.verified`" ]; then
-    die "remount -R command failed to disable verity"
+    die "remount -R command failed to disable verity
+${INDENT}ro.boot.verifiedbootstate=\"`get_property ro.boot.verifiedbootstate`\"
+${INDENT}partition.system.verified=\"`get_property partition.system.verified`\""
   fi
 
   echo "${GREEN}[       OK ]${NORMAL} 'adb remount -R' command" >&2
diff --git a/fs_mgr/tests/fs_mgr_test.cpp b/fs_mgr/tests/fs_mgr_test.cpp
index 6d87594..c5adea6 100644
--- a/fs_mgr/tests/fs_mgr_test.cpp
+++ b/fs_mgr/tests/fs_mgr_test.cpp
@@ -179,6 +179,7 @@
                 {"nodiratime", MS_NODIRATIME},
                 {"ro", MS_RDONLY},
                 {"rw", 0},
+                {"sync", MS_SYNCHRONOUS},
                 {"remount", MS_REMOUNT},
                 {"bind", MS_BIND},
                 {"rec", MS_REC},
@@ -197,7 +198,7 @@
         if (!(entry.flags & MS_RDONLY)) {
             fs_options.emplace("rw");
         }
-        EXPECT_EQ(mnt_opts, fs_options);
+        EXPECT_EQ(mnt_opts, fs_options) << "At line " << i;
         ++i;
     }
     EXPECT_EQ(i, fstab.size());
@@ -420,8 +421,7 @@
     EXPECT_EQ(0, entry->max_comp_streams);
     EXPECT_EQ(0, entry->zram_size);
     EXPECT_EQ(0, entry->reserved_size);
-    EXPECT_EQ("", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
+    EXPECT_EQ("", entry->encryption_options);
     EXPECT_EQ(0, entry->erase_blk_size);
     EXPECT_EQ(0, entry->logical_blk_size);
     EXPECT_EQ("", entry->sysfs_path);
@@ -448,8 +448,7 @@
     EXPECT_EQ(0, entry->max_comp_streams);
     EXPECT_EQ(0, entry->zram_size);
     EXPECT_EQ(0, entry->reserved_size);
-    EXPECT_EQ("", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
+    EXPECT_EQ("", entry->encryption_options);
     EXPECT_EQ(0, entry->erase_blk_size);
     EXPECT_EQ(0, entry->logical_blk_size);
     EXPECT_EQ("", entry->sysfs_path);
@@ -458,15 +457,14 @@
     EXPECT_EQ("", entry->zram_backing_dev_path);
     entry++;
 
-    // forcefdeorfbe sets file_contents_mode and file_names_mode by default, so test it separately.
+    // forcefdeorfbe has its own encryption_options defaults, so test it separately.
     EXPECT_EQ("none2", entry->mount_point);
     {
         FstabEntry::FsMgrFlags flags = {};
         flags.force_fde_or_fbe = true;
         EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
     }
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
+    EXPECT_EQ("aes-256-xts:aes-256-cts", entry->encryption_options);
     EXPECT_EQ("", entry->key_loc);
 }
 
@@ -680,32 +678,21 @@
     EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
 
     EXPECT_EQ("/dir/key", entry->key_loc);
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
+    EXPECT_EQ("aes-256-xts:aes-256-cts", entry->encryption_options);
 }
 
 TEST(fs_mgr, ReadFstabFromFile_FsMgrOptions_FileEncryption) {
     TemporaryFile tf;
     ASSERT_TRUE(tf.fd != -1);
     std::string fstab_contents = R"fs(
-source none0       swap   defaults      fileencryption=blah
-source none1       swap   defaults      fileencryption=software
-source none2       swap   defaults      fileencryption=aes-256-xts
-source none3       swap   defaults      fileencryption=adiantum
-source none4       swap   defaults      fileencryption=adiantum:aes-256-heh
-source none5       swap   defaults      fileencryption=ice
-source none6       swap   defaults      fileencryption=ice:blah
-source none7       swap   defaults      fileencryption=ice:aes-256-cts
-source none8       swap   defaults      fileencryption=ice:aes-256-heh
-source none9       swap   defaults      fileencryption=ice:adiantum
-source none10      swap   defaults      fileencryption=ice:adiantum:
+source none0       swap   defaults      fileencryption=aes-256-xts:aes-256-cts:v1
 )fs";
 
     ASSERT_TRUE(android::base::WriteStringToFile(fstab_contents, tf.path));
 
     Fstab fstab;
     EXPECT_TRUE(ReadFstabFromFile(tf.path, &fstab));
-    ASSERT_EQ(11U, fstab.size());
+    ASSERT_EQ(1U, fstab.size());
 
     FstabEntry::FsMgrFlags flags = {};
     flags.file_encryption = true;
@@ -713,68 +700,7 @@
     auto entry = fstab.begin();
     EXPECT_EQ("none0", entry->mount_point);
     EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
-
-    entry++;
-    EXPECT_EQ("none1", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-
-    entry++;
-    EXPECT_EQ("none2", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-
-    entry++;
-    EXPECT_EQ("none3", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("adiantum", entry->file_contents_mode);
-    EXPECT_EQ("adiantum", entry->file_names_mode);
-
-    entry++;
-    EXPECT_EQ("none4", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("adiantum", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-heh", entry->file_names_mode);
-
-    entry++;
-    EXPECT_EQ("none5", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-
-    entry++;
-    EXPECT_EQ("none6", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
-
-    entry++;
-    EXPECT_EQ("none7", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-
-    entry++;
-    EXPECT_EQ("none8", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-heh", entry->file_names_mode);
-
-    entry++;
-    EXPECT_EQ("none9", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("adiantum", entry->file_names_mode);
-
-    entry++;
-    EXPECT_EQ("none10", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
+    EXPECT_EQ("aes-256-xts:aes-256-cts:v1", entry->encryption_options);
 }
 
 TEST(fs_mgr, ReadFstabFromFile_FsMgrOptions_MaxCompStreams) {
@@ -1036,3 +962,21 @@
     EXPECT_EQ("none5", entry->mount_point);
     EXPECT_EQ("/dev/path2", entry->zram_backing_dev_path);
 }
+
+TEST(fs_mgr, DefaultFstabContainsUserdata) {
+    Fstab fstab;
+    ASSERT_TRUE(ReadDefaultFstab(&fstab)) << "Failed to read default fstab";
+    ASSERT_NE(nullptr, GetEntryForMountPoint(&fstab, "/data"))
+            << "Default fstab doesn't contain /data entry";
+}
+
+TEST(fs_mgr, UserdataMountedFromDefaultFstab) {
+    if (getuid() != 0) {
+        GTEST_SKIP() << "Must be run as root.";
+        return;
+    }
+    Fstab fstab;
+    ASSERT_TRUE(ReadDefaultFstab(&fstab)) << "Failed to read default fstab";
+    ASSERT_NE(nullptr, GetMountedEntryForUserdata(&fstab))
+            << "/data wasn't mounted from default fstab";
+}
diff --git a/gatekeeperd/Android.bp b/gatekeeperd/Android.bp
index 778e08c..27a6452 100644
--- a/gatekeeperd/Android.bp
+++ b/gatekeeperd/Android.bp
@@ -38,8 +38,6 @@
         "libkeystore_aidl",
         "libkeystore_binder",
         "libhidlbase",
-        "libhidltransport",
-        "libhwbinder",
         "android.hardware.gatekeeper@1.0",
         "libgatekeeper_aidl",
     ],
diff --git a/healthd/Android.bp b/healthd/Android.bp
index 53be526..14d46b3 100644
--- a/healthd/Android.bp
+++ b/healthd/Android.bp
@@ -17,6 +17,10 @@
     shared_libs: [
         "libutils",
         "libbase",
+
+        // Need latest HealthInfo definition from headers of this shared
+        // library. Clients don't need to link to this.
+        "android.hardware.health@2.1",
     ],
     header_libs: ["libhealthd_headers"],
     export_header_lib_headers: ["libhealthd_headers"],
@@ -42,8 +46,6 @@
         "libbase",
         "libcutils",
         "libhidlbase",
-        "libhidltransport",
-        "libhwbinder",
         "liblog",
         "libutils",
         "android.hardware.health@2.0",
@@ -87,6 +89,7 @@
 
 cc_library_static {
     name: "libhealthd_charger_nops",
+    recovery_available: true,
 
     srcs: [
         "healthd_mode_charger_nops.cpp",
@@ -102,17 +105,19 @@
     ],
 
     static_libs: [
-        "android.hardware.health@2.0-impl",
+        "libhealthloop",
+        "libhealth2impl",
     ],
 
     shared_libs: [
-        "android.hardware.health@2.0",
+        "android.hardware.health@2.1",
         "libutils",
     ],
 }
 
 sysprop_library {
     name: "charger_sysprop",
+    recovery_available: true,
     srcs: ["charger.sysprop"],
     property_owner: "Platform",
     api_packages: ["android.sysprop"],
@@ -139,16 +144,16 @@
     export_include_dirs: [".", "include"],
 
     static_libs: [
-        "android.hardware.health@2.0-impl",
         "android.hardware.health@1.0-convert",
         "libcharger_sysprop",
-        "libhealthstoragedefault",
         "libhealthd_draw",
+        "libhealthloop",
+        "libhealth2impl",
         "libminui",
     ],
 
     shared_libs: [
-        "android.hardware.health@2.0",
+        "android.hardware.health@2.1",
         "libbase",
         "libcutils",
         "liblog",
@@ -162,3 +167,76 @@
         "AnimationParser.cpp",
     ],
 }
+
+cc_defaults {
+    name: "charger_defaults",
+
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+
+    shared_libs: [
+        // common
+        "android.hardware.health@2.0",
+        "android.hardware.health@2.1",
+        "libbase",
+        "libcutils",
+        "libhidlbase",
+        "liblog",
+        "libutils",
+
+        // system charger only
+        "libpng",
+    ],
+
+    static_libs: [
+        // common
+        "android.hardware.health@1.0-convert",
+        "libbatterymonitor",
+        "libcharger_sysprop",
+        "libhealthd_charger_nops",
+        "libhealthloop",
+        "libhealth2impl",
+
+        // system charger only
+        "libhealthd_draw",
+        "libhealthd_charger",
+        "libminui",
+        "libsuspend",
+    ],
+}
+
+cc_binary {
+    name: "charger",
+    defaults: ["charger_defaults"],
+    recovery_available: true,
+    srcs: [
+        "charger.cpp",
+        "charger_utils.cpp",
+    ],
+
+    target: {
+        recovery: {
+            // No UI and libsuspend for recovery charger.
+            cflags: [
+                "-DCHARGER_FORCE_NO_UI=1",
+            ],
+            exclude_shared_libs: [
+                "libpng",
+            ],
+            exclude_static_libs: [
+                "libhealthd_draw",
+                "libhealthd_charger",
+                "libminui",
+                "libsuspend",
+            ],
+        }
+    }
+}
+
+cc_test {
+    name: "charger_test",
+    defaults: ["charger_defaults"],
+    srcs: ["charger_test.cpp"],
+}
diff --git a/healthd/Android.mk b/healthd/Android.mk
index b87f3c7..4b09cf8 100644
--- a/healthd/Android.mk
+++ b/healthd/Android.mk
@@ -2,116 +2,10 @@
 
 LOCAL_PATH := $(call my-dir)
 
-### charger ###
-include $(CLEAR_VARS)
 ifeq ($(strip $(BOARD_CHARGER_NO_UI)),true)
 LOCAL_CHARGER_NO_UI := true
 endif
 
-LOCAL_SRC_FILES := \
-    charger.cpp \
-
-LOCAL_MODULE := charger
-LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
-
-LOCAL_CFLAGS := -Werror
-
-CHARGER_STATIC_LIBRARIES := \
-    android.hardware.health@2.0-impl \
-    android.hardware.health@1.0-convert \
-    libbinderthreadstate \
-    libcharger_sysprop \
-    libhidltransport \
-    libhidlbase \
-    libhwbinder_noltopgo \
-    libhealthstoragedefault \
-    libminui \
-    libvndksupport \
-    libhealthd_charger \
-    libhealthd_charger_nops \
-    libhealthd_draw \
-    libbatterymonitor \
-
-CHARGER_SHARED_LIBRARIES := \
-    android.hardware.health@2.0 \
-    libbase \
-    libcutils \
-    libjsoncpp \
-    libpng \
-    libprocessgroup \
-    liblog \
-    libutils \
-
-CHARGER_SHARED_LIBRARIES += libsuspend
-
-LOCAL_STATIC_LIBRARIES := $(CHARGER_STATIC_LIBRARIES)
-LOCAL_SHARED_LIBRARIES := $(CHARGER_SHARED_LIBRARIES)
-
-LOCAL_HAL_STATIC_LIBRARIES := libhealthd
-
-# Symlink /charger to /system/bin/charger
-LOCAL_POST_INSTALL_CMD := $(hide) mkdir -p $(TARGET_ROOT_OUT) \
-    && ln -sf /system/bin/charger $(TARGET_ROOT_OUT)/charger
-
-include $(BUILD_EXECUTABLE)
-
-### charger.recovery ###
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-    charger.cpp \
-
-LOCAL_MODULE := charger.recovery
-LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/system/bin
-LOCAL_MODULE_STEM := charger
-
-LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
-LOCAL_CFLAGS := -Wall -Werror -DCHARGER_FORCE_NO_UI=1
-
-# charger.recovery doesn't link against libhealthd_{charger,draw} or libminui, since it doesn't need
-# any UI support.
-LOCAL_STATIC_LIBRARIES := \
-    android.hardware.health@2.0-impl \
-    android.hardware.health@1.0-convert \
-    libbinderthreadstate \
-    libcharger_sysprop \
-    libhidltransport \
-    libhidlbase \
-    libhwbinder_noltopgo \
-    libhealthstoragedefault \
-    libvndksupport \
-    libhealthd_charger_nops \
-    libbatterymonitor \
-
-# These shared libs will be installed to recovery image because of the dependency in `recovery`
-# module.
-LOCAL_SHARED_LIBRARIES := \
-    android.hardware.health@2.0 \
-    libbase \
-    libcutils \
-    liblog \
-    libutils \
-
-# The use of LOCAL_HAL_STATIC_LIBRARIES prevents from building this module with Android.bp.
-LOCAL_HAL_STATIC_LIBRARIES := libhealthd
-
-include $(BUILD_EXECUTABLE)
-
-### charger_test ###
-include $(CLEAR_VARS)
-LOCAL_MODULE := charger_test
-LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
-LOCAL_CFLAGS := -Wall -Werror
-LOCAL_STATIC_LIBRARIES := $(CHARGER_STATIC_LIBRARIES)
-LOCAL_SHARED_LIBRARIES := $(CHARGER_SHARED_LIBRARIES)
-LOCAL_SRC_FILES := \
-    charger_test.cpp \
-
-include $(BUILD_EXECUTABLE)
-
-CHARGER_STATIC_LIBRARIES :=
-CHARGER_SHARED_LIBRARIES :=
-
 ### charger_res_images ###
 ifneq ($(strip $(LOCAL_CHARGER_NO_UI)),true)
 define _add-charger-image
diff --git a/healthd/BatteryMonitor.cpp b/healthd/BatteryMonitor.cpp
index 06c8176..bdf4aac 100644
--- a/healthd/BatteryMonitor.cpp
+++ b/healthd/BatteryMonitor.cpp
@@ -29,10 +29,12 @@
 
 #include <algorithm>
 #include <memory>
+#include <optional>
 
 #include <android-base/file.h>
 #include <android-base/parseint.h>
 #include <android-base/strings.h>
+#include <android/hardware/health/2.1/types.h>
 #include <batteryservice/BatteryService.h>
 #include <cutils/klog.h>
 #include <cutils/properties.h>
@@ -47,97 +49,106 @@
 #define MILLION 1.0e6
 #define DEFAULT_VBUS_VOLTAGE 5000000
 
+using HealthInfo_1_0 = android::hardware::health::V1_0::HealthInfo;
+using HealthInfo_2_0 = android::hardware::health::V2_0::HealthInfo;
+using HealthInfo_2_1 = android::hardware::health::V2_1::HealthInfo;
+using android::hardware::health::V1_0::BatteryHealth;
+using android::hardware::health::V1_0::BatteryStatus;
+using android::hardware::health::V2_1::BatteryCapacityLevel;
+
 namespace android {
 
-struct sysfsStringEnumMap {
+template <typename T>
+struct SysfsStringEnumMap {
     const char* s;
-    int val;
+    T val;
 };
 
-static int mapSysfsString(const char* str,
-                          struct sysfsStringEnumMap map[]) {
+template <typename T>
+static std::optional<T> mapSysfsString(const char* str, SysfsStringEnumMap<T> map[]) {
     for (int i = 0; map[i].s; i++)
         if (!strcmp(str, map[i].s))
             return map[i].val;
 
-    return -1;
+    return std::nullopt;
 }
 
-static void initBatteryProperties(BatteryProperties* props) {
-    props->chargerAcOnline = false;
-    props->chargerUsbOnline = false;
-    props->chargerWirelessOnline = false;
-    props->maxChargingCurrent = 0;
-    props->maxChargingVoltage = 0;
-    props->batteryStatus = BATTERY_STATUS_UNKNOWN;
-    props->batteryHealth = BATTERY_HEALTH_UNKNOWN;
-    props->batteryPresent = false;
-    props->batteryLevel = 0;
-    props->batteryVoltage = 0;
-    props->batteryTemperature = 0;
-    props->batteryCurrent = 0;
-    props->batteryCycleCount = 0;
-    props->batteryFullCharge = 0;
-    props->batteryChargeCounter = 0;
-    props->batteryTechnology.clear();
+static void initHealthInfo(HealthInfo_2_1* health_info_2_1) {
+    *health_info_2_1 = HealthInfo_2_1{};
+
+    // HIDL enum values are zero initialized, so they need to be initialized
+    // properly.
+    health_info_2_1->batteryCapacityLevel = BatteryCapacityLevel::UNKNOWN;
+    auto* props = &health_info_2_1->legacy.legacy;
+    props->batteryStatus = BatteryStatus::UNKNOWN;
+    props->batteryHealth = BatteryHealth::UNKNOWN;
 }
 
 BatteryMonitor::BatteryMonitor()
     : mHealthdConfig(nullptr),
       mBatteryDevicePresent(false),
       mBatteryFixedCapacity(0),
-      mBatteryFixedTemperature(0) {
-    initBatteryProperties(&props);
+      mBatteryFixedTemperature(0),
+      mHealthInfo(std::make_unique<HealthInfo_2_1>()) {
+    initHealthInfo(mHealthInfo.get());
 }
 
-struct BatteryProperties getBatteryProperties(BatteryMonitor* batteryMonitor) {
-    return batteryMonitor->props;
+BatteryMonitor::~BatteryMonitor() {}
+
+const HealthInfo_1_0& BatteryMonitor::getHealthInfo_1_0() const {
+    return getHealthInfo_2_0().legacy;
 }
 
-int BatteryMonitor::getBatteryStatus(const char* status) {
-    int ret;
-    struct sysfsStringEnumMap batteryStatusMap[] = {
-        { "Unknown", BATTERY_STATUS_UNKNOWN },
-        { "Charging", BATTERY_STATUS_CHARGING },
-        { "Discharging", BATTERY_STATUS_DISCHARGING },
-        { "Not charging", BATTERY_STATUS_NOT_CHARGING },
-        { "Full", BATTERY_STATUS_FULL },
-        { NULL, 0 },
+const HealthInfo_2_0& BatteryMonitor::getHealthInfo_2_0() const {
+    return getHealthInfo_2_1().legacy;
+}
+
+const HealthInfo_2_1& BatteryMonitor::getHealthInfo_2_1() const {
+    return *mHealthInfo;
+}
+
+BatteryStatus getBatteryStatus(const char* status) {
+    static SysfsStringEnumMap<BatteryStatus> batteryStatusMap[] = {
+            {"Unknown", BatteryStatus::UNKNOWN},
+            {"Charging", BatteryStatus::CHARGING},
+            {"Discharging", BatteryStatus::DISCHARGING},
+            {"Not charging", BatteryStatus::NOT_CHARGING},
+            {"Full", BatteryStatus::FULL},
+            {NULL, BatteryStatus::UNKNOWN},
     };
 
-    ret = mapSysfsString(status, batteryStatusMap);
-    if (ret < 0) {
+    auto ret = mapSysfsString(status, batteryStatusMap);
+    if (!ret) {
         KLOG_WARNING(LOG_TAG, "Unknown battery status '%s'\n", status);
-        ret = BATTERY_STATUS_UNKNOWN;
+        *ret = BatteryStatus::UNKNOWN;
     }
 
-    return ret;
+    return *ret;
 }
 
-int BatteryMonitor::getBatteryHealth(const char* status) {
-    int ret;
-    struct sysfsStringEnumMap batteryHealthMap[] = {
-        { "Unknown", BATTERY_HEALTH_UNKNOWN },
-        { "Good", BATTERY_HEALTH_GOOD },
-        { "Overheat", BATTERY_HEALTH_OVERHEAT },
-        { "Dead", BATTERY_HEALTH_DEAD },
-        { "Over voltage", BATTERY_HEALTH_OVER_VOLTAGE },
-        { "Unspecified failure", BATTERY_HEALTH_UNSPECIFIED_FAILURE },
-        { "Cold", BATTERY_HEALTH_COLD },
-        // battery health values from JEITA spec
-        { "Warm", BATTERY_HEALTH_GOOD },
-        { "Cool", BATTERY_HEALTH_GOOD },
-        { "Hot", BATTERY_HEALTH_OVERHEAT },
-        { NULL, 0 },
+BatteryHealth getBatteryHealth(const char* status) {
+    static SysfsStringEnumMap<BatteryHealth> batteryHealthMap[] = {
+            {"Unknown", BatteryHealth::UNKNOWN},
+            {"Good", BatteryHealth::GOOD},
+            {"Overheat", BatteryHealth::OVERHEAT},
+            {"Dead", BatteryHealth::DEAD},
+            {"Over voltage", BatteryHealth::OVER_VOLTAGE},
+            {"Unspecified failure", BatteryHealth::UNSPECIFIED_FAILURE},
+            {"Cold", BatteryHealth::COLD},
+            // battery health values from JEITA spec
+            {"Warm", BatteryHealth::GOOD},
+            {"Cool", BatteryHealth::GOOD},
+            {"Hot", BatteryHealth::OVERHEAT},
+            {NULL, BatteryHealth::UNKNOWN},
     };
 
-    ret = mapSysfsString(status, batteryHealthMap);
-    if (ret < 0) {
+    auto ret = mapSysfsString(status, batteryHealthMap);
+    if (!ret) {
         KLOG_WARNING(LOG_TAG, "Unknown battery health '%s'\n", status);
-        ret = BATTERY_HEALTH_UNKNOWN;
+        *ret = BatteryHealth::UNKNOWN;
     }
 
-    return ret;
+    return *ret;
 }
 
 int BatteryMonitor::readFromFile(const String8& path, std::string* buf) {
@@ -148,35 +159,34 @@
 }
 
 BatteryMonitor::PowerSupplyType BatteryMonitor::readPowerSupplyType(const String8& path) {
-    std::string buf;
-    int ret;
-    struct sysfsStringEnumMap supplyTypeMap[] = {
-            { "Unknown", ANDROID_POWER_SUPPLY_TYPE_UNKNOWN },
-            { "Battery", ANDROID_POWER_SUPPLY_TYPE_BATTERY },
-            { "UPS", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "Mains", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "USB", ANDROID_POWER_SUPPLY_TYPE_USB },
-            { "USB_DCP", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "USB_HVDCP", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "USB_CDP", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "USB_ACA", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "USB_C", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "USB_PD", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "USB_PD_DRP", ANDROID_POWER_SUPPLY_TYPE_USB },
-            { "Wireless", ANDROID_POWER_SUPPLY_TYPE_WIRELESS },
-            { NULL, 0 },
+    static SysfsStringEnumMap<int> supplyTypeMap[] = {
+            {"Unknown", ANDROID_POWER_SUPPLY_TYPE_UNKNOWN},
+            {"Battery", ANDROID_POWER_SUPPLY_TYPE_BATTERY},
+            {"UPS", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"Mains", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"USB", ANDROID_POWER_SUPPLY_TYPE_USB},
+            {"USB_DCP", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"USB_HVDCP", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"USB_CDP", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"USB_ACA", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"USB_C", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"USB_PD", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"USB_PD_DRP", ANDROID_POWER_SUPPLY_TYPE_USB},
+            {"Wireless", ANDROID_POWER_SUPPLY_TYPE_WIRELESS},
+            {NULL, 0},
     };
+    std::string buf;
 
     if (readFromFile(path, &buf) <= 0)
         return ANDROID_POWER_SUPPLY_TYPE_UNKNOWN;
 
-    ret = mapSysfsString(buf.c_str(), supplyTypeMap);
-    if (ret < 0) {
+    auto ret = mapSysfsString(buf.c_str(), supplyTypeMap);
+    if (!ret) {
         KLOG_WARNING(LOG_TAG, "Unknown power supply type '%s'\n", buf.c_str());
-        ret = ANDROID_POWER_SUPPLY_TYPE_UNKNOWN;
+        *ret = ANDROID_POWER_SUPPLY_TYPE_UNKNOWN;
     }
 
-    return static_cast<BatteryMonitor::PowerSupplyType>(ret);
+    return static_cast<BatteryMonitor::PowerSupplyType>(*ret);
 }
 
 bool BatteryMonitor::getBooleanField(const String8& path) {
@@ -200,10 +210,10 @@
     return value;
 }
 
-bool BatteryMonitor::update(void) {
-    bool logthis;
+void BatteryMonitor::updateValues(void) {
+    initHealthInfo(mHealthInfo.get());
 
-    initBatteryProperties(&props);
+    HealthInfo_1_0& props = mHealthInfo->legacy.legacy;
 
     if (!mHealthdConfig->batteryPresentPath.isEmpty())
         props.batteryPresent = getBooleanField(mHealthdConfig->batteryPresentPath);
@@ -227,6 +237,15 @@
     if (!mHealthdConfig->batteryChargeCounterPath.isEmpty())
         props.batteryChargeCounter = getIntField(mHealthdConfig->batteryChargeCounterPath);
 
+    if (!mHealthdConfig->batteryCurrentAvgPath.isEmpty())
+        mHealthInfo->legacy.batteryCurrentAverage =
+                getIntField(mHealthdConfig->batteryCurrentAvgPath);
+
+    // TODO(b/142260281): Retrieve these values correctly.
+    mHealthInfo->batteryCapacityLevel = BatteryCapacityLevel::UNKNOWN;
+    mHealthInfo->batteryChargeTimeToFullNowSeconds = 0;
+    mHealthInfo->batteryFullCapacityUah = props.batteryFullCharge;
+
     props.batteryTemperature = mBatteryFixedTemperature ?
         mBatteryFixedTemperature :
         getIntField(mHealthdConfig->batteryTemperaturePath);
@@ -289,62 +308,58 @@
             }
         }
     }
+}
 
-    logthis = !healthd_board_battery_update(&props);
+void BatteryMonitor::logValues(void) {
+    char dmesgline[256];
+    size_t len;
+    const HealthInfo_1_0& props = mHealthInfo->legacy.legacy;
+    if (props.batteryPresent) {
+        snprintf(dmesgline, sizeof(dmesgline), "battery l=%d v=%d t=%s%d.%d h=%d st=%d",
+                 props.batteryLevel, props.batteryVoltage, props.batteryTemperature < 0 ? "-" : "",
+                 abs(props.batteryTemperature / 10), abs(props.batteryTemperature % 10),
+                 props.batteryHealth, props.batteryStatus);
 
-    if (logthis) {
-        char dmesgline[256];
-        size_t len;
-        if (props.batteryPresent) {
-            snprintf(dmesgline, sizeof(dmesgline),
-                 "battery l=%d v=%d t=%s%d.%d h=%d st=%d",
-                 props.batteryLevel, props.batteryVoltage,
-                 props.batteryTemperature < 0 ? "-" : "",
-                 abs(props.batteryTemperature / 10),
-                 abs(props.batteryTemperature % 10), props.batteryHealth,
-                 props.batteryStatus);
-
-            len = strlen(dmesgline);
-            if (!mHealthdConfig->batteryCurrentNowPath.isEmpty()) {
-                len += snprintf(dmesgline + len, sizeof(dmesgline) - len,
-                                " c=%d", props.batteryCurrent);
-            }
-
-            if (!mHealthdConfig->batteryFullChargePath.isEmpty()) {
-                len += snprintf(dmesgline + len, sizeof(dmesgline) - len,
-                                " fc=%d", props.batteryFullCharge);
-            }
-
-            if (!mHealthdConfig->batteryCycleCountPath.isEmpty()) {
-                len += snprintf(dmesgline + len, sizeof(dmesgline) - len,
-                                " cc=%d", props.batteryCycleCount);
-            }
-        } else {
-            len = snprintf(dmesgline, sizeof(dmesgline),
-                 "battery none");
+        len = strlen(dmesgline);
+        if (!mHealthdConfig->batteryCurrentNowPath.isEmpty()) {
+            len += snprintf(dmesgline + len, sizeof(dmesgline) - len, " c=%d",
+                            props.batteryCurrent);
         }
 
-        snprintf(dmesgline + len, sizeof(dmesgline) - len, " chg=%s%s%s",
-                 props.chargerAcOnline ? "a" : "",
-                 props.chargerUsbOnline ? "u" : "",
-                 props.chargerWirelessOnline ? "w" : "");
+        if (!mHealthdConfig->batteryFullChargePath.isEmpty()) {
+            len += snprintf(dmesgline + len, sizeof(dmesgline) - len, " fc=%d",
+                            props.batteryFullCharge);
+        }
 
-        KLOG_WARNING(LOG_TAG, "%s\n", dmesgline);
+        if (!mHealthdConfig->batteryCycleCountPath.isEmpty()) {
+            len += snprintf(dmesgline + len, sizeof(dmesgline) - len, " cc=%d",
+                            props.batteryCycleCount);
+        }
+    } else {
+        len = snprintf(dmesgline, sizeof(dmesgline), "battery none");
     }
 
-    healthd_mode_ops->battery_update(&props);
+    snprintf(dmesgline + len, sizeof(dmesgline) - len, " chg=%s%s%s",
+             props.chargerAcOnline ? "a" : "", props.chargerUsbOnline ? "u" : "",
+             props.chargerWirelessOnline ? "w" : "");
+
+    KLOG_WARNING(LOG_TAG, "%s\n", dmesgline);
+}
+
+bool BatteryMonitor::isChargerOnline() {
+    const HealthInfo_1_0& props = mHealthInfo->legacy.legacy;
     return props.chargerAcOnline | props.chargerUsbOnline |
             props.chargerWirelessOnline;
 }
 
 int BatteryMonitor::getChargeStatus() {
-    int result = BATTERY_STATUS_UNKNOWN;
+    BatteryStatus result = BatteryStatus::UNKNOWN;
     if (!mHealthdConfig->batteryStatusPath.isEmpty()) {
         std::string buf;
         if (readFromFile(mHealthdConfig->batteryStatusPath, &buf) > 0)
             result = getBatteryStatus(buf.c_str());
     }
-    return result;
+    return static_cast<int>(result);
 }
 
 status_t BatteryMonitor::getProperty(int id, struct BatteryProperty *val) {
@@ -417,6 +432,7 @@
 void BatteryMonitor::dumpState(int fd) {
     int v;
     char vs[128];
+    const HealthInfo_1_0& props = mHealthInfo->legacy.legacy;
 
     snprintf(vs, sizeof(vs), "ac: %d usb: %d wireless: %d current_max: %d voltage_max: %d\n",
              props.chargerAcOnline, props.chargerUsbOnline,
diff --git a/healthd/animation.h b/healthd/animation.h
index 9476c91..d02d7a7 100644
--- a/healthd/animation.h
+++ b/healthd/animation.h
@@ -75,7 +75,7 @@
 
     bool run;
 
-    frame* frames;
+    frame* frames = nullptr;
     int cur_frame;
     int num_frames;
     int first_frame_repeats;  // Number of times to repeat the first frame in the current cycle
@@ -85,6 +85,8 @@
 
     int cur_level;  // current battery level being animated (0-100)
     int cur_status;  // current battery status - see BatteryService.h for BATTERY_STATUS_*
+
+    ~animation() { delete frames; }
 };
 
 }
diff --git a/healthd/api/charger_sysprop-current.txt b/healthd/api/charger_sysprop-current.txt
new file mode 100644
index 0000000..678c847
--- /dev/null
+++ b/healthd/api/charger_sysprop-current.txt
@@ -0,0 +1,29 @@
+props {
+  module: "android.sysprop.ChargerProperties"
+  prop {
+    api_name: "disable_init_blank"
+    scope: Internal
+    prop_name: "ro.charger.disable_init_blank"
+  }
+  prop {
+    api_name: "draw_split_offset"
+    type: Long
+    scope: Internal
+    prop_name: "ro.charger.draw_split_offset"
+  }
+  prop {
+    api_name: "draw_split_screen"
+    scope: Internal
+    prop_name: "ro.charger.draw_split_screen"
+  }
+  prop {
+    api_name: "enable_suspend"
+    scope: Internal
+    prop_name: "ro.charger.enable_suspend"
+  }
+  prop {
+    api_name: "no_ui"
+    scope: Internal
+    prop_name: "ro.charger.no_ui"
+  }
+}
diff --git a/healthd/api/charger_sysprop-latest.txt b/healthd/api/charger_sysprop-latest.txt
new file mode 100644
index 0000000..678c847
--- /dev/null
+++ b/healthd/api/charger_sysprop-latest.txt
@@ -0,0 +1,29 @@
+props {
+  module: "android.sysprop.ChargerProperties"
+  prop {
+    api_name: "disable_init_blank"
+    scope: Internal
+    prop_name: "ro.charger.disable_init_blank"
+  }
+  prop {
+    api_name: "draw_split_offset"
+    type: Long
+    scope: Internal
+    prop_name: "ro.charger.draw_split_offset"
+  }
+  prop {
+    api_name: "draw_split_screen"
+    scope: Internal
+    prop_name: "ro.charger.draw_split_screen"
+  }
+  prop {
+    api_name: "enable_suspend"
+    scope: Internal
+    prop_name: "ro.charger.enable_suspend"
+  }
+  prop {
+    api_name: "no_ui"
+    scope: Internal
+    prop_name: "ro.charger.no_ui"
+  }
+}
diff --git a/healthd/api/current.txt b/healthd/api/current.txt
deleted file mode 100644
index d802177..0000000
--- a/healthd/api/current.txt
+++ /dev/null
@@ -1 +0,0 @@
-// Signature format: 2.0
diff --git a/healthd/api/removed.txt b/healthd/api/removed.txt
deleted file mode 100644
index d802177..0000000
--- a/healthd/api/removed.txt
+++ /dev/null
@@ -1 +0,0 @@
-// Signature format: 2.0
diff --git a/healthd/api/system-current.txt b/healthd/api/system-current.txt
deleted file mode 100644
index d802177..0000000
--- a/healthd/api/system-current.txt
+++ /dev/null
@@ -1 +0,0 @@
-// Signature format: 2.0
diff --git a/healthd/api/system-removed.txt b/healthd/api/system-removed.txt
deleted file mode 100644
index d802177..0000000
--- a/healthd/api/system-removed.txt
+++ /dev/null
@@ -1 +0,0 @@
-// Signature format: 2.0
diff --git a/healthd/api/test-current.txt b/healthd/api/test-current.txt
deleted file mode 100644
index d802177..0000000
--- a/healthd/api/test-current.txt
+++ /dev/null
@@ -1 +0,0 @@
-// Signature format: 2.0
diff --git a/healthd/api/test-removed.txt b/healthd/api/test-removed.txt
deleted file mode 100644
index d802177..0000000
--- a/healthd/api/test-removed.txt
+++ /dev/null
@@ -1 +0,0 @@
-// Signature format: 2.0
diff --git a/healthd/charger_test.cpp b/healthd/charger_test.cpp
index a7e2161..e0bde68 100644
--- a/healthd/charger_test.cpp
+++ b/healthd/charger_test.cpp
@@ -21,13 +21,22 @@
 #include <condition_variable>
 #include <fstream>
 #include <iostream>
+#include <memory>
 #include <mutex>
 #include <streambuf>
 #include <string>
 #include <thread>
 #include <vector>
 
-#include <health2/Health.h>
+#include <health/utils.h>
+#include <health2impl/Health.h>
+
+#include "healthd_mode_charger.h"
+
+using android::hardware::health::InitHealthdConfig;
+using android::hardware::health::V2_1::HealthInfo;
+using android::hardware::health::V2_1::IHealth;
+using android::hardware::health::V2_1::implementation::Health;
 
 #define LOG_THIS(fmt, ...)     \
     ALOGE(fmt, ##__VA_ARGS__); \
@@ -129,22 +138,23 @@
     config->screen_on = NULL;
 }
 
-int healthd_board_battery_update(struct android::BatteryProperties*) {
-    getUpdateNotifier().set(true /* updated */);
+class TestHealth : public Health {
+  protected:
+    using Health::Health;
+    void UpdateHealthInfo(HealthInfo*) override { getUpdateNotifier().set(true /* updated */); }
+};
 
-    // return 0 to log periodic polled battery status to kernel log
-    return 0;
-}
-
-extern int healthd_charger_main(int argc, char** argv);
-
-int main(int argc, char** argv) {
-    using android::hardware::health::V2_0::implementation::Health;
-
+int main(int /*argc*/, char** /*argv*/) {
     const char* dumpFile = "/data/local/tmp/dump.txt";
 
+    auto config = std::make_unique<healthd_config>();
+    InitHealthdConfig(config.get());
+    healthd_board_init(config.get());
+    sp<IHealth> passthrough = new TestHealth(std::move(config));
+
     std::thread bgThread([=] {
-        healthd_charger_main(argc, argv);
+        android::Charger charger(passthrough);
+        charger.StartLoop();
     });
 
     // wait for healthd_init to finish
@@ -153,7 +163,7 @@
         exit(1);
     }
 
-    Health::getImplementation()->debug(createHidlHandle(dumpFile), {} /* options */);
+    passthrough->debug(createHidlHandle(dumpFile), {} /* options */);
 
     std::string content = openToString(dumpFile);
     int status = expectContains(content, {
diff --git a/healthd/charger_utils.cpp b/healthd/charger_utils.cpp
new file mode 100644
index 0000000..0cf9df5
--- /dev/null
+++ b/healthd/charger_utils.cpp
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "charger_utils.h"
+
+#include <android-base/logging.h>
+#include <android/hidl/manager/1.0/IServiceManager.h>
+#include <health/utils.h>
+#include <health2impl/Health.h>
+#include <hidl/ServiceManagement.h>
+
+using android::hardware::getPassthroughServiceManager;
+using android::hidl::base::V1_0::IBase;
+using android::hidl::manager::V1_0::IServiceManager;
+
+namespace android {
+namespace hardware {
+namespace health {
+sp<V2_1::IHealth> GetPassthroughHealthImpl() {
+    // Not using getService() because there is no hwservicemanager in charger mode.
+    sp<IServiceManager> pm = getPassthroughServiceManager();
+    if (pm == nullptr) {
+        LOG(WARNING) << "Cannot get passthrough service manager.";
+        return nullptr;
+    }
+    sp<IBase> base = pm->get(V2_0::IHealth::descriptor, "default");
+    if (base == nullptr) {
+        LOG(WARNING) << "Cannot find passthrough implementation of health 2.0 HAL for instance "
+                        "'default' on the device.";
+        return nullptr;
+    }
+    sp<V2_1::IHealth> service = V2_1::IHealth::castFrom(base);
+    if (service == nullptr) {
+        LOG(WARNING)
+                << "Cannot cast passthrough implementation of health 2.0 HAL to 2.1 for instance "
+                   "'default' on the device.";
+        return nullptr;
+    }
+    return service;
+}
+
+sp<V2_1::IHealth> GetPassthroughHealth() {
+    auto impl = GetPassthroughHealthImpl();
+    if (impl == nullptr) {
+        LOG(WARNING) << "Charger uses system defaults.";
+        auto config = std::make_unique<healthd_config>();
+        InitHealthdConfig(config.get());
+        impl = new V2_1::implementation::Health(std::move(config));
+    }
+    return impl;
+}
+
+}  // namespace health
+}  // namespace hardware
+}  // namespace android
diff --git a/libnativeloader/utils.h b/healthd/charger_utils.h
similarity index 73%
rename from libnativeloader/utils.h
rename to healthd/charger_utils.h
index a1c2be5..f96e827 100644
--- a/libnativeloader/utils.h
+++ b/healthd/charger_utils.h
@@ -13,14 +13,15 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 #pragma once
 
-namespace android::nativeloader {
+#include <android/hardware/health/2.1/IHealth.h>
 
-#if defined(__LP64__)
-#define LIB "lib64"
-#else
-#define LIB "lib"
-#endif
-
-}  // namespace android::nativeloader
+namespace android {
+namespace hardware {
+namespace health {
+sp<V2_1::IHealth> GetPassthroughHealth();
+}  // namespace health
+}  // namespace hardware
+}  // namespace android
diff --git a/healthd/healthd_mode_charger.cpp b/healthd/healthd_mode_charger.cpp
index d676083..7d844c9 100644
--- a/healthd/healthd_mode_charger.cpp
+++ b/healthd/healthd_mode_charger.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include "healthd_mode_charger.h"
+
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
@@ -28,7 +30,7 @@
 #include <time.h>
 #include <unistd.h>
 
-#include <functional>
+#include <optional>
 
 #include <android-base/file.h>
 #include <android-base/macros.h>
@@ -47,16 +49,30 @@
 
 #include "AnimationParser.h"
 #include "charger.sysprop.h"
+#include "charger_utils.h"
 #include "healthd_draw.h"
 
-#include <health2/Health.h>
+#include <android/hardware/health/2.0/IHealthInfoCallback.h>
+#include <health/utils.h>
+#include <health2impl/HalHealthLoop.h>
+#include <health2impl/Health.h>
 #include <healthd/healthd.h>
 
 using namespace android;
+using android::hardware::Return;
+using android::hardware::health::GetPassthroughHealth;
+using android::hardware::health::HealthLoop;
+using android::hardware::health::V1_0::BatteryStatus;
+using android::hardware::health::V2_0::Result;
+using android::hardware::health::V2_1::IHealth;
+using IHealth_2_0 = android::hardware::health::V2_0::IHealth;
+using HealthInfo_1_0 = android::hardware::health::V1_0::HealthInfo;
+using HealthInfo_2_1 = android::hardware::health::V2_1::HealthInfo;
 
 // main healthd loop
 extern int healthd_main(void);
 
+// minui globals
 char* locale;
 
 #ifndef max
@@ -85,6 +101,8 @@
 #define LOGW(x...) KLOG_WARNING("charger", x);
 #define LOGV(x...) KLOG_DEBUG("charger", x);
 
+namespace android {
+
 // Resources in /product/etc/res overrides resources in /res.
 // If the device is using the Generic System Image (GSI), resources may exist in
 // both paths.
@@ -93,28 +111,6 @@
 static constexpr const char* product_animation_root = "/product/etc/res/images/";
 static constexpr const char* animation_desc_path = "/res/values/charger/animation.txt";
 
-struct key_state {
-    bool pending;
-    bool down;
-    int64_t timestamp;
-};
-
-struct charger {
-    bool have_battery_state;
-    bool charger_connected;
-    bool screen_blanked;
-    int64_t next_screen_transition;
-    int64_t next_key_check;
-    int64_t next_pwr_check;
-    int64_t wait_batt_level_timestamp;
-
-    key_state keys[KEY_MAX + 1];
-
-    animation* batt_anim;
-    GRSurface* surf_unknown;
-    int boot_min_cap;
-};
-
 static const animation BASE_ANIMATION = {
     .text_clock =
         {
@@ -153,51 +149,51 @@
     .cur_status = BATTERY_STATUS_UNKNOWN,
 };
 
-static animation::frame default_animation_frames[] = {
-    {
-        .disp_time = 750,
-        .min_level = 0,
-        .max_level = 19,
-        .surface = NULL,
-    },
-    {
-        .disp_time = 750,
-        .min_level = 0,
-        .max_level = 39,
-        .surface = NULL,
-    },
-    {
-        .disp_time = 750,
-        .min_level = 0,
-        .max_level = 59,
-        .surface = NULL,
-    },
-    {
-        .disp_time = 750,
-        .min_level = 0,
-        .max_level = 79,
-        .surface = NULL,
-    },
-    {
-        .disp_time = 750,
-        .min_level = 80,
-        .max_level = 95,
-        .surface = NULL,
-    },
-    {
-        .disp_time = 750,
-        .min_level = 0,
-        .max_level = 100,
-        .surface = NULL,
-    },
-};
+void Charger::InitDefaultAnimationFrames() {
+    owned_frames_ = {
+            {
+                    .disp_time = 750,
+                    .min_level = 0,
+                    .max_level = 19,
+                    .surface = NULL,
+            },
+            {
+                    .disp_time = 750,
+                    .min_level = 0,
+                    .max_level = 39,
+                    .surface = NULL,
+            },
+            {
+                    .disp_time = 750,
+                    .min_level = 0,
+                    .max_level = 59,
+                    .surface = NULL,
+            },
+            {
+                    .disp_time = 750,
+                    .min_level = 0,
+                    .max_level = 79,
+                    .surface = NULL,
+            },
+            {
+                    .disp_time = 750,
+                    .min_level = 80,
+                    .max_level = 95,
+                    .surface = NULL,
+            },
+            {
+                    .disp_time = 750,
+                    .min_level = 0,
+                    .max_level = 100,
+                    .surface = NULL,
+            },
+    };
+}
 
-static animation battery_animation = BASE_ANIMATION;
+Charger::Charger(const sp<IHealth>& service)
+    : HalHealthLoop("charger", service), batt_anim_(BASE_ANIMATION) {}
 
-static charger charger_state;
-static healthd_config* healthd_config;
-static android::BatteryProperties* batt_prop;
-static std::unique_ptr<HealthdDraw> healthd_draw;
+Charger::~Charger() {}
 
 /* current time in milliseconds */
 static int64_t curr_time_ms() {
@@ -284,123 +280,125 @@
     anim->run = false;
 }
 
-static void update_screen_state(charger* charger, int64_t now) {
-    animation* batt_anim = charger->batt_anim;
+void Charger::UpdateScreenState(int64_t now) {
     int disp_time;
 
-    if (!batt_anim->run || now < charger->next_screen_transition) return;
+    if (!batt_anim_.run || now < next_screen_transition_) return;
 
     // If battery level is not ready, keep checking in the defined time
-    if (batt_prop == nullptr ||
-        (batt_prop->batteryLevel == 0 && batt_prop->batteryStatus == BATTERY_STATUS_UNKNOWN)) {
-        if (charger->wait_batt_level_timestamp == 0) {
+    if (health_info_.batteryLevel == 0 && health_info_.batteryStatus == BatteryStatus::UNKNOWN) {
+        if (wait_batt_level_timestamp_ == 0) {
             // Set max delay time and skip drawing screen
-            charger->wait_batt_level_timestamp = now + MAX_BATT_LEVEL_WAIT_TIME;
+            wait_batt_level_timestamp_ = now + MAX_BATT_LEVEL_WAIT_TIME;
             LOGV("[%" PRId64 "] wait for battery capacity ready\n", now);
             return;
-        } else if (now <= charger->wait_batt_level_timestamp) {
+        } else if (now <= wait_batt_level_timestamp_) {
             // Do nothing, keep waiting
             return;
         }
         // If timeout and battery level is still not ready, draw unknown battery
     }
 
-    if (healthd_draw == nullptr) {
-        if (healthd_config && healthd_config->screen_on) {
-            if (!healthd_config->screen_on(batt_prop)) {
+    if (healthd_draw_ == nullptr) {
+        std::optional<bool> out_screen_on;
+        service()->shouldKeepScreenOn([&](Result res, bool screen_on) {
+            if (res == Result::SUCCESS) {
+                *out_screen_on = screen_on;
+            }
+        });
+        if (out_screen_on.has_value()) {
+            if (!*out_screen_on) {
                 LOGV("[%" PRId64 "] leave screen off\n", now);
-                batt_anim->run = false;
-                charger->next_screen_transition = -1;
-                if (charger->charger_connected) request_suspend(true);
+                batt_anim_.run = false;
+                next_screen_transition_ = -1;
+                if (charger_online()) request_suspend(true);
                 return;
             }
         }
 
-        healthd_draw.reset(new HealthdDraw(batt_anim));
+        healthd_draw_.reset(new HealthdDraw(&batt_anim_));
 
         if (android::sysprop::ChargerProperties::disable_init_blank().value_or(false)) {
-            healthd_draw->blank_screen(true);
-            charger->screen_blanked = true;
+            healthd_draw_->blank_screen(true);
+            screen_blanked_ = true;
         }
     }
 
     /* animation is over, blank screen and leave */
-    if (batt_anim->num_cycles > 0 && batt_anim->cur_cycle == batt_anim->num_cycles) {
-        reset_animation(batt_anim);
-        charger->next_screen_transition = -1;
-        healthd_draw->blank_screen(true);
-        charger->screen_blanked = true;
+    if (batt_anim_.num_cycles > 0 && batt_anim_.cur_cycle == batt_anim_.num_cycles) {
+        reset_animation(&batt_anim_);
+        next_screen_transition_ = -1;
+        healthd_draw_->blank_screen(true);
+        screen_blanked_ = true;
         LOGV("[%" PRId64 "] animation done\n", now);
-        if (charger->charger_connected) request_suspend(true);
+        if (charger_online()) request_suspend(true);
         return;
     }
 
-    disp_time = batt_anim->frames[batt_anim->cur_frame].disp_time;
+    disp_time = batt_anim_.frames[batt_anim_.cur_frame].disp_time;
 
-    if (charger->screen_blanked) {
-        healthd_draw->blank_screen(false);
-        charger->screen_blanked = false;
+    if (screen_blanked_) {
+        healthd_draw_->blank_screen(false);
+        screen_blanked_ = false;
     }
 
     /* animation starting, set up the animation */
-    if (batt_anim->cur_frame == 0) {
+    if (batt_anim_.cur_frame == 0) {
         LOGV("[%" PRId64 "] animation starting\n", now);
-        if (batt_prop) {
-            batt_anim->cur_level = batt_prop->batteryLevel;
-            batt_anim->cur_status = batt_prop->batteryStatus;
-            if (batt_prop->batteryLevel >= 0 && batt_anim->num_frames != 0) {
-                /* find first frame given current battery level */
-                for (int i = 0; i < batt_anim->num_frames; i++) {
-                    if (batt_anim->cur_level >= batt_anim->frames[i].min_level &&
-                        batt_anim->cur_level <= batt_anim->frames[i].max_level) {
-                        batt_anim->cur_frame = i;
-                        break;
-                    }
+        batt_anim_.cur_level = health_info_.batteryLevel;
+        batt_anim_.cur_status = (int)health_info_.batteryStatus;
+        if (health_info_.batteryLevel >= 0 && batt_anim_.num_frames != 0) {
+            /* find first frame given current battery level */
+            for (int i = 0; i < batt_anim_.num_frames; i++) {
+                if (batt_anim_.cur_level >= batt_anim_.frames[i].min_level &&
+                    batt_anim_.cur_level <= batt_anim_.frames[i].max_level) {
+                    batt_anim_.cur_frame = i;
+                    break;
                 }
-
-                if (charger->charger_connected) {
-                    // repeat the first frame first_frame_repeats times
-                    disp_time = batt_anim->frames[batt_anim->cur_frame].disp_time *
-                                batt_anim->first_frame_repeats;
-                } else {
-                    disp_time = UNPLUGGED_DISPLAY_TIME / batt_anim->num_cycles;
-                }
-
-                LOGV("cur_frame=%d disp_time=%d\n", batt_anim->cur_frame, disp_time);
             }
+
+            if (charger_online()) {
+                // repeat the first frame first_frame_repeats times
+                disp_time = batt_anim_.frames[batt_anim_.cur_frame].disp_time *
+                            batt_anim_.first_frame_repeats;
+            } else {
+                disp_time = UNPLUGGED_DISPLAY_TIME / batt_anim_.num_cycles;
+            }
+
+            LOGV("cur_frame=%d disp_time=%d\n", batt_anim_.cur_frame, disp_time);
         }
     }
 
     /* draw the new frame (@ cur_frame) */
-    healthd_draw->redraw_screen(charger->batt_anim, charger->surf_unknown);
+    healthd_draw_->redraw_screen(&batt_anim_, surf_unknown_);
 
     /* if we don't have anim frames, we only have one image, so just bump
      * the cycle counter and exit
      */
-    if (batt_anim->num_frames == 0 || batt_anim->cur_level < 0) {
+    if (batt_anim_.num_frames == 0 || batt_anim_.cur_level < 0) {
         LOGW("[%" PRId64 "] animation missing or unknown battery status\n", now);
-        charger->next_screen_transition = now + BATTERY_UNKNOWN_TIME;
-        batt_anim->cur_cycle++;
+        next_screen_transition_ = now + BATTERY_UNKNOWN_TIME;
+        batt_anim_.cur_cycle++;
         return;
     }
 
     /* schedule next screen transition */
-    charger->next_screen_transition = curr_time_ms() + disp_time;
+    next_screen_transition_ = curr_time_ms() + disp_time;
 
     /* advance frame cntr to the next valid frame only if we are charging
      * if necessary, advance cycle cntr, and reset frame cntr
      */
-    if (charger->charger_connected) {
-        batt_anim->cur_frame++;
+    if (charger_online()) {
+        batt_anim_.cur_frame++;
 
-        while (batt_anim->cur_frame < batt_anim->num_frames &&
-               (batt_anim->cur_level < batt_anim->frames[batt_anim->cur_frame].min_level ||
-                batt_anim->cur_level > batt_anim->frames[batt_anim->cur_frame].max_level)) {
-            batt_anim->cur_frame++;
+        while (batt_anim_.cur_frame < batt_anim_.num_frames &&
+               (batt_anim_.cur_level < batt_anim_.frames[batt_anim_.cur_frame].min_level ||
+                batt_anim_.cur_level > batt_anim_.frames[batt_anim_.cur_frame].max_level)) {
+            batt_anim_.cur_frame++;
         }
-        if (batt_anim->cur_frame >= batt_anim->num_frames) {
-            batt_anim->cur_cycle++;
-            batt_anim->cur_frame = 0;
+        if (batt_anim_.cur_frame >= batt_anim_.num_frames) {
+            batt_anim_.cur_cycle++;
+            batt_anim_.cur_frame = 0;
 
             /* don't reset the cycle counter, since we use that as a signal
              * in a test above to check if animation is over
@@ -411,29 +409,29 @@
          * If we stop it immediately instead of going through this loop, then
          * the animation would stop somewhere in the middle.
          */
-        batt_anim->cur_frame = 0;
-        batt_anim->cur_cycle++;
+        batt_anim_.cur_frame = 0;
+        batt_anim_.cur_cycle++;
     }
 }
 
-static int set_key_callback(charger* charger, int code, int value) {
+int Charger::SetKeyCallback(int code, int value) {
     int64_t now = curr_time_ms();
     int down = !!value;
 
     if (code > KEY_MAX) return -1;
 
     /* ignore events that don't modify our state */
-    if (charger->keys[code].down == down) return 0;
+    if (keys_[code].down == down) return 0;
 
     /* only record the down even timestamp, as the amount
      * of time the key spent not being pressed is not useful */
-    if (down) charger->keys[code].timestamp = now;
-    charger->keys[code].down = down;
-    charger->keys[code].pending = true;
+    if (down) keys_[code].timestamp = now;
+    keys_[code].down = down;
+    keys_[code].pending = true;
     if (down) {
         LOGV("[%" PRId64 "] key[%d] down\n", now, code);
     } else {
-        int64_t duration = now - charger->keys[code].timestamp;
+        int64_t duration = now - keys_[code].timestamp;
         int64_t secs = duration / 1000;
         int64_t msecs = duration - secs * 1000;
         LOGV("[%" PRId64 "] key[%d] up (was down for %" PRId64 ".%" PRId64 "sec)\n", now, code,
@@ -443,20 +441,19 @@
     return 0;
 }
 
-static void update_input_state(charger* charger, input_event* ev) {
+void Charger::UpdateInputState(input_event* ev) {
     if (ev->type != EV_KEY) return;
-    set_key_callback(charger, ev->code, ev->value);
+    SetKeyCallback(ev->code, ev->value);
 }
 
-static void set_next_key_check(charger* charger, key_state* key, int64_t timeout) {
+void Charger::SetNextKeyCheck(key_state* key, int64_t timeout) {
     int64_t then = key->timestamp + timeout;
 
-    if (charger->next_key_check == -1 || then < charger->next_key_check)
-        charger->next_key_check = then;
+    if (next_key_check_ == -1 || then < next_key_check_) next_key_check_ = then;
 }
 
-static void process_key(charger* charger, int code, int64_t now) {
-    key_state* key = &charger->keys[code];
+void Charger::ProcessKey(int code, int64_t now) {
+    key_state* key = &keys_[code];
 
     if (code == KEY_POWER) {
         if (key->down) {
@@ -469,7 +466,7 @@
                     LOGW("[%" PRId64 "] booting from charger mode\n", now);
                     property_set("sys.boot_from_charger_mode", "1");
                 } else {
-                    if (charger->batt_anim->cur_level >= charger->boot_min_cap) {
+                    if (batt_anim_.cur_level >= boot_min_cap_) {
                         LOGW("[%" PRId64 "] rebooting\n", now);
                         reboot(RB_AUTOBOOT);
                     } else {
@@ -483,18 +480,18 @@
                 /* if the key is pressed but timeout hasn't expired,
                  * make sure we wake up at the right-ish time to check
                  */
-                set_next_key_check(charger, key, POWER_ON_KEY_TIME);
+                SetNextKeyCheck(key, POWER_ON_KEY_TIME);
 
                 /* Turn on the display and kick animation on power-key press
                  * rather than on key release
                  */
-                kick_animation(charger->batt_anim);
+                kick_animation(&batt_anim_);
                 request_suspend(false);
             }
         } else {
             /* if the power key got released, force screen state cycle */
             if (key->pending) {
-                kick_animation(charger->batt_anim);
+                kick_animation(&batt_anim_);
                 request_suspend(false);
             }
         }
@@ -503,36 +500,35 @@
     key->pending = false;
 }
 
-static void handle_input_state(charger* charger, int64_t now) {
-    process_key(charger, KEY_POWER, now);
+void Charger::HandleInputState(int64_t now) {
+    ProcessKey(KEY_POWER, now);
 
-    if (charger->next_key_check != -1 && now > charger->next_key_check)
-        charger->next_key_check = -1;
+    if (next_key_check_ != -1 && now > next_key_check_) next_key_check_ = -1;
 }
 
-static void handle_power_supply_state(charger* charger, int64_t now) {
+void Charger::HandlePowerSupplyState(int64_t now) {
     int timer_shutdown = UNPLUGGED_SHUTDOWN_TIME;
-    if (!charger->have_battery_state) return;
+    if (!have_battery_state_) return;
 
-    if (!charger->charger_connected) {
+    if (!charger_online()) {
         request_suspend(false);
-        if (charger->next_pwr_check == -1) {
+        if (next_pwr_check_ == -1) {
             /* Last cycle would have stopped at the extreme top of battery-icon
              * Need to show the correct level corresponding to capacity.
              *
-             * Reset next_screen_transition to update screen immediately.
+             * Reset next_screen_transition_ to update screen immediately.
              * Reset & kick animation to show complete animation cycles
              * when charger disconnected.
              */
             timer_shutdown =
                     property_get_int32(UNPLUGGED_SHUTDOWN_TIME_PROP, UNPLUGGED_SHUTDOWN_TIME);
-            charger->next_screen_transition = now - 1;
-            reset_animation(charger->batt_anim);
-            kick_animation(charger->batt_anim);
-            charger->next_pwr_check = now + timer_shutdown;
+            next_screen_transition_ = now - 1;
+            reset_animation(&batt_anim_);
+            kick_animation(&batt_anim_);
+            next_pwr_check_ = now + timer_shutdown;
             LOGW("[%" PRId64 "] device unplugged: shutting down in %" PRId64 " (@ %" PRId64 ")\n",
-                 now, (int64_t)timer_shutdown, charger->next_pwr_check);
-        } else if (now >= charger->next_pwr_check) {
+                 now, (int64_t)timer_shutdown, next_pwr_check_);
+        } else if (now >= next_pwr_check_) {
             LOGW("[%" PRId64 "] shutting down\n", now);
             reboot(RB_POWER_OFF);
         } else {
@@ -540,64 +536,60 @@
         }
     } else {
         /* online supply present, reset shutdown timer if set */
-        if (charger->next_pwr_check != -1) {
-            /* Reset next_screen_transition to update screen immediately.
+        if (next_pwr_check_ != -1) {
+            /* Reset next_screen_transition_ to update screen immediately.
              * Reset & kick animation to show complete animation cycles
              * when charger connected again.
              */
             request_suspend(false);
-            charger->next_screen_transition = now - 1;
-            reset_animation(charger->batt_anim);
-            kick_animation(charger->batt_anim);
+            next_screen_transition_ = now - 1;
+            reset_animation(&batt_anim_);
+            kick_animation(&batt_anim_);
             LOGW("[%" PRId64 "] device plugged in: shutdown cancelled\n", now);
         }
-        charger->next_pwr_check = -1;
+        next_pwr_check_ = -1;
     }
 }
 
-void healthd_mode_charger_heartbeat() {
-    charger* charger = &charger_state;
+void Charger::Heartbeat() {
+    // charger* charger = &charger_state;
     int64_t now = curr_time_ms();
 
-    handle_input_state(charger, now);
-    handle_power_supply_state(charger, now);
+    HandleInputState(now);
+    HandlePowerSupplyState(now);
 
     /* do screen update last in case any of the above want to start
      * screen transitions (animations, etc)
      */
-    update_screen_state(charger, now);
+    UpdateScreenState(now);
 }
 
-void healthd_mode_charger_battery_update(android::BatteryProperties* props) {
-    charger* charger = &charger_state;
+void Charger::OnHealthInfoChanged(const HealthInfo_2_1& health_info) {
+    set_charger_online(health_info);
 
-    charger->charger_connected =
-        props->chargerAcOnline || props->chargerUsbOnline || props->chargerWirelessOnline;
-
-    if (!charger->have_battery_state) {
-        charger->have_battery_state = true;
-        charger->next_screen_transition = curr_time_ms() - 1;
+    if (!have_battery_state_) {
+        have_battery_state_ = true;
+        next_screen_transition_ = curr_time_ms() - 1;
         request_suspend(false);
-        reset_animation(charger->batt_anim);
-        kick_animation(charger->batt_anim);
+        reset_animation(&batt_anim_);
+        kick_animation(&batt_anim_);
     }
-    batt_prop = props;
+    health_info_ = health_info.legacy.legacy;
+
+    AdjustWakealarmPeriods(charger_online());
 }
 
-int healthd_mode_charger_preparetowait(void) {
-    charger* charger = &charger_state;
+int Charger::PrepareToWait(void) {
     int64_t now = curr_time_ms();
     int64_t next_event = INT64_MAX;
     int64_t timeout;
 
     LOGV("[%" PRId64 "] next screen: %" PRId64 " next key: %" PRId64 " next pwr: %" PRId64 "\n",
-         now, charger->next_screen_transition, charger->next_key_check, charger->next_pwr_check);
+         now, next_screen_transition_, next_key_check_, next_pwr_check_);
 
-    if (charger->next_screen_transition != -1) next_event = charger->next_screen_transition;
-    if (charger->next_key_check != -1 && charger->next_key_check < next_event)
-        next_event = charger->next_key_check;
-    if (charger->next_pwr_check != -1 && charger->next_pwr_check < next_event)
-        next_event = charger->next_pwr_check;
+    if (next_screen_transition_ != -1) next_event = next_screen_transition_;
+    if (next_key_check_ != -1 && next_key_check_ < next_event) next_event = next_key_check_;
+    if (next_pwr_check_ != -1 && next_pwr_check_ < next_event) next_event = next_pwr_check_;
 
     if (next_event != -1 && next_event != INT64_MAX)
         timeout = max(0, next_event - now);
@@ -607,32 +599,32 @@
     return (int)timeout;
 }
 
-static int input_callback(charger* charger, int fd, unsigned int epevents) {
+int Charger::InputCallback(int fd, unsigned int epevents) {
     input_event ev;
     int ret;
 
     ret = ev_get_input(fd, epevents, &ev);
     if (ret) return -1;
-    update_input_state(charger, &ev);
+    UpdateInputState(&ev);
     return 0;
 }
 
-static void charger_event_handler(uint32_t /*epevents*/) {
+static void charger_event_handler(HealthLoop* /*charger_loop*/, uint32_t /*epevents*/) {
     int ret;
 
     ret = ev_wait(-1);
     if (!ret) ev_dispatch();
 }
 
-animation* init_animation() {
+void Charger::InitAnimation() {
     bool parse_success;
 
     std::string content;
     if (base::ReadFileToString(product_animation_desc_path, &content)) {
-        parse_success = parse_animation_desc(content, &battery_animation);
-        battery_animation.set_resource_root(product_animation_root);
+        parse_success = parse_animation_desc(content, &batt_anim_);
+        batt_anim_.set_resource_root(product_animation_root);
     } else if (base::ReadFileToString(animation_desc_path, &content)) {
-        parse_success = parse_animation_desc(content, &battery_animation);
+        parse_success = parse_animation_desc(content, &batt_anim_);
     } else {
         LOGW("Could not open animation description at %s\n", animation_desc_path);
         parse_success = false;
@@ -640,41 +632,36 @@
 
     if (!parse_success) {
         LOGW("Could not parse animation description. Using default animation.\n");
-        battery_animation = BASE_ANIMATION;
-        battery_animation.animation_file.assign("charger/battery_scale");
-        battery_animation.frames = default_animation_frames;
-        battery_animation.num_frames = ARRAY_SIZE(default_animation_frames);
+        batt_anim_ = BASE_ANIMATION;
+        batt_anim_.animation_file.assign("charger/battery_scale");
+        InitDefaultAnimationFrames();
+        batt_anim_.frames = owned_frames_.data();
+        batt_anim_.num_frames = owned_frames_.size();
     }
-    if (battery_animation.fail_file.empty()) {
-        battery_animation.fail_file.assign("charger/battery_fail");
+    if (batt_anim_.fail_file.empty()) {
+        batt_anim_.fail_file.assign("charger/battery_fail");
     }
 
     LOGV("Animation Description:\n");
-    LOGV("  animation: %d %d '%s' (%d)\n", battery_animation.num_cycles,
-         battery_animation.first_frame_repeats, battery_animation.animation_file.c_str(),
-         battery_animation.num_frames);
-    LOGV("  fail_file: '%s'\n", battery_animation.fail_file.c_str());
-    LOGV("  clock: %d %d %d %d %d %d '%s'\n", battery_animation.text_clock.pos_x,
-         battery_animation.text_clock.pos_y, battery_animation.text_clock.color_r,
-         battery_animation.text_clock.color_g, battery_animation.text_clock.color_b,
-         battery_animation.text_clock.color_a, battery_animation.text_clock.font_file.c_str());
-    LOGV("  percent: %d %d %d %d %d %d '%s'\n", battery_animation.text_percent.pos_x,
-         battery_animation.text_percent.pos_y, battery_animation.text_percent.color_r,
-         battery_animation.text_percent.color_g, battery_animation.text_percent.color_b,
-         battery_animation.text_percent.color_a, battery_animation.text_percent.font_file.c_str());
-    for (int i = 0; i < battery_animation.num_frames; i++) {
-        LOGV("  frame %.2d: %d %d %d\n", i, battery_animation.frames[i].disp_time,
-             battery_animation.frames[i].min_level, battery_animation.frames[i].max_level);
+    LOGV("  animation: %d %d '%s' (%d)\n", batt_anim_.num_cycles, batt_anim_.first_frame_repeats,
+         batt_anim_.animation_file.c_str(), batt_anim_.num_frames);
+    LOGV("  fail_file: '%s'\n", batt_anim_.fail_file.c_str());
+    LOGV("  clock: %d %d %d %d %d %d '%s'\n", batt_anim_.text_clock.pos_x,
+         batt_anim_.text_clock.pos_y, batt_anim_.text_clock.color_r, batt_anim_.text_clock.color_g,
+         batt_anim_.text_clock.color_b, batt_anim_.text_clock.color_a,
+         batt_anim_.text_clock.font_file.c_str());
+    LOGV("  percent: %d %d %d %d %d %d '%s'\n", batt_anim_.text_percent.pos_x,
+         batt_anim_.text_percent.pos_y, batt_anim_.text_percent.color_r,
+         batt_anim_.text_percent.color_g, batt_anim_.text_percent.color_b,
+         batt_anim_.text_percent.color_a, batt_anim_.text_percent.font_file.c_str());
+    for (int i = 0; i < batt_anim_.num_frames; i++) {
+        LOGV("  frame %.2d: %d %d %d\n", i, batt_anim_.frames[i].disp_time,
+             batt_anim_.frames[i].min_level, batt_anim_.frames[i].max_level);
     }
-
-    return &battery_animation;
 }
 
-void healthd_mode_charger_init(struct healthd_config* config) {
-    using android::hardware::health::V2_0::implementation::Health;
-
+void Charger::Init(struct healthd_config* config) {
     int ret;
-    charger* charger = &charger_state;
     int i;
     int epollfd;
 
@@ -682,22 +669,22 @@
 
     LOGW("--------------- STARTING CHARGER MODE ---------------\n");
 
-    ret = ev_init(std::bind(&input_callback, charger, std::placeholders::_1, std::placeholders::_2));
+    ret = ev_init(
+            std::bind(&Charger::InputCallback, this, std::placeholders::_1, std::placeholders::_2));
     if (!ret) {
         epollfd = ev_get_epollfd();
-        healthd_register_event(epollfd, charger_event_handler, EVENT_WAKEUP_FD);
+        RegisterEvent(epollfd, &charger_event_handler, EVENT_WAKEUP_FD);
     }
 
-    animation* anim = init_animation();
-    charger->batt_anim = anim;
+    InitAnimation();
 
-    ret = res_create_display_surface(anim->fail_file.c_str(), &charger->surf_unknown);
+    ret = res_create_display_surface(batt_anim_.fail_file.c_str(), &surf_unknown_);
     if (ret < 0) {
         LOGE("Cannot load custom battery_fail image. Reverting to built in: %d\n", ret);
-        ret = res_create_display_surface("charger/battery_fail", &charger->surf_unknown);
+        ret = res_create_display_surface("charger/battery_fail", &surf_unknown_);
         if (ret < 0) {
             LOGE("Cannot load built in battery_fail image\n");
-            charger->surf_unknown = NULL;
+            surf_unknown_ = NULL;
         }
     }
 
@@ -705,49 +692,41 @@
     int scale_count;
     int scale_fps;  // Not in use (charger/battery_scale doesn't have FPS text
                     // chunk). We are using hard-coded frame.disp_time instead.
-    ret = res_create_multi_display_surface(anim->animation_file.c_str(), &scale_count, &scale_fps,
-                                           &scale_frames);
+    ret = res_create_multi_display_surface(batt_anim_.animation_file.c_str(), &scale_count,
+                                           &scale_fps, &scale_frames);
     if (ret < 0) {
         LOGE("Cannot load battery_scale image\n");
-        anim->num_frames = 0;
-        anim->num_cycles = 1;
-    } else if (scale_count != anim->num_frames) {
+        batt_anim_.num_frames = 0;
+        batt_anim_.num_cycles = 1;
+    } else if (scale_count != batt_anim_.num_frames) {
         LOGE("battery_scale image has unexpected frame count (%d, expected %d)\n", scale_count,
-             anim->num_frames);
-        anim->num_frames = 0;
-        anim->num_cycles = 1;
+             batt_anim_.num_frames);
+        batt_anim_.num_frames = 0;
+        batt_anim_.num_cycles = 1;
     } else {
-        for (i = 0; i < anim->num_frames; i++) {
-            anim->frames[i].surface = scale_frames[i];
+        for (i = 0; i < batt_anim_.num_frames; i++) {
+            batt_anim_.frames[i].surface = scale_frames[i];
         }
     }
-    ev_sync_key_state(
-        std::bind(&set_key_callback, charger, std::placeholders::_1, std::placeholders::_2));
+    ev_sync_key_state(std::bind(&Charger::SetKeyCallback, this, std::placeholders::_1,
+                                std::placeholders::_2));
 
-    charger->next_screen_transition = -1;
-    charger->next_key_check = -1;
-    charger->next_pwr_check = -1;
-    charger->wait_batt_level_timestamp = 0;
+    next_screen_transition_ = -1;
+    next_key_check_ = -1;
+    next_pwr_check_ = -1;
+    wait_batt_level_timestamp_ = 0;
 
-    // Initialize Health implementation (which initializes the internal BatteryMonitor).
-    Health::initInstance(config);
+    // Retrieve healthd_config from the existing health HAL.
+    HalHealthLoop::Init(config);
 
-    healthd_config = config;
-    charger->boot_min_cap = config->boot_min_cap;
+    boot_min_cap_ = config->boot_min_cap;
 }
 
-static struct healthd_mode_ops charger_ops = {
-        .init = healthd_mode_charger_init,
-        .preparetowait = healthd_mode_charger_preparetowait,
-        .heartbeat = healthd_mode_charger_heartbeat,
-        .battery_update = healthd_mode_charger_battery_update,
-};
+}  // namespace android
 
 int healthd_charger_main(int argc, char** argv) {
     int ch;
 
-    healthd_mode_ops = &charger_ops;
-
     while ((ch = getopt(argc, argv, "cr")) != -1) {
         switch (ch) {
             case 'c':
@@ -763,5 +742,6 @@
         }
     }
 
-    return healthd_main();
+    Charger charger(GetPassthroughHealth());
+    return charger.StartLoop();
 }
diff --git a/healthd/healthd_mode_charger.h b/healthd/healthd_mode_charger.h
index 2f0c9f2..370ca86 100644
--- a/healthd/healthd_mode_charger.h
+++ b/healthd/healthd_mode_charger.h
@@ -16,4 +16,72 @@
 
 #pragma once
 
+#include <linux/input.h>
+
+#include <memory>
+#include <vector>
+
+#include <android/hardware/health/2.0/IHealthInfoCallback.h>
+#include <android/hardware/health/2.1/IHealth.h>
+#include <health2impl/HalHealthLoop.h>
+
+#include "animation.h"
+
+class GRSurface;
+class HealthdDraw;
+
+namespace android {
+struct key_state {
+    bool pending;
+    bool down;
+    int64_t timestamp;
+};
+
+class Charger : public ::android::hardware::health::V2_1::implementation::HalHealthLoop {
+  public:
+    using HealthInfo_1_0 = android::hardware::health::V1_0::HealthInfo;
+    using HealthInfo_2_1 = android::hardware::health::V2_1::HealthInfo;
+
+    Charger(const sp<android::hardware::health::V2_1::IHealth>& service);
+    ~Charger();
+
+  protected:
+    // HealthLoop overrides.
+    void Heartbeat() override;
+    int PrepareToWait() override;
+    void Init(struct healthd_config* config) override;
+    // HalHealthLoop overrides
+    void OnHealthInfoChanged(const HealthInfo_2_1& health_info) override;
+
+  private:
+    void InitDefaultAnimationFrames();
+    void UpdateScreenState(int64_t now);
+    int SetKeyCallback(int code, int value);
+    void UpdateInputState(input_event* ev);
+    void SetNextKeyCheck(key_state* key, int64_t timeout);
+    void ProcessKey(int code, int64_t now);
+    void HandleInputState(int64_t now);
+    void HandlePowerSupplyState(int64_t now);
+    int InputCallback(int fd, unsigned int epevents);
+    void InitAnimation();
+
+    bool have_battery_state_ = false;
+    bool screen_blanked_ = false;
+    int64_t next_screen_transition_ = 0;
+    int64_t next_key_check_ = 0;
+    int64_t next_pwr_check_ = 0;
+    int64_t wait_batt_level_timestamp_ = 0;
+
+    key_state keys_[KEY_MAX + 1];
+
+    animation batt_anim_;
+    GRSurface* surf_unknown_ = nullptr;
+    int boot_min_cap_ = 0;
+
+    HealthInfo_1_0 health_info_ = {};
+    std::unique_ptr<HealthdDraw> healthd_draw_;
+    std::vector<animation::frame> owned_frames_;
+};
+}  // namespace android
+
 int healthd_charger_main(int argc, char** argv);
diff --git a/healthd/healthd_mode_charger_nops.cpp b/healthd/healthd_mode_charger_nops.cpp
index bcc04d5..13e7348 100644
--- a/healthd/healthd_mode_charger_nops.cpp
+++ b/healthd/healthd_mode_charger_nops.cpp
@@ -16,45 +16,14 @@
 
 #include "healthd_mode_charger_nops.h"
 
-#include <health2/Health.h>
-#include <healthd/healthd.h>
+#include <health2impl/HalHealthLoop.h>
 
-#include <stdlib.h>
-#include <string.h>
+#include "charger_utils.h"
 
-using namespace android;
-
-// main healthd loop
-extern int healthd_main(void);
-
-// NOPs for modes that need no special action
-
-static void healthd_mode_nop_init(struct healthd_config* config);
-static int healthd_mode_nop_preparetowait(void);
-static void healthd_mode_nop_heartbeat(void);
-static void healthd_mode_nop_battery_update(struct android::BatteryProperties* props);
-
-static struct healthd_mode_ops healthd_nops = {
-        .init = healthd_mode_nop_init,
-        .preparetowait = healthd_mode_nop_preparetowait,
-        .heartbeat = healthd_mode_nop_heartbeat,
-        .battery_update = healthd_mode_nop_battery_update,
-};
-
-static void healthd_mode_nop_init(struct healthd_config* config) {
-    using android::hardware::health::V2_0::implementation::Health;
-    Health::initInstance(config);
-}
-
-static int healthd_mode_nop_preparetowait(void) {
-    return -1;
-}
-
-static void healthd_mode_nop_heartbeat(void) {}
-
-static void healthd_mode_nop_battery_update(struct android::BatteryProperties* /*props*/) {}
+using android::hardware::health::GetPassthroughHealth;
+using android::hardware::health::V2_1::implementation::HalHealthLoop;
 
 int healthd_charger_nops(int /* argc */, char** /* argv */) {
-    healthd_mode_ops = &healthd_nops;
-    return healthd_main();
+    HalHealthLoop charger("charger", GetPassthroughHealth());
+    return charger.StartLoop();
 }
diff --git a/healthd/include/healthd/BatteryMonitor.h b/healthd/include/healthd/BatteryMonitor.h
index 4d1d53f..d41a374 100644
--- a/healthd/include/healthd/BatteryMonitor.h
+++ b/healthd/include/healthd/BatteryMonitor.h
@@ -17,6 +17,8 @@
 #ifndef HEALTHD_BATTERYMONITOR_H
 #define HEALTHD_BATTERYMONITOR_H
 
+#include <memory>
+
 #include <batteryservice/BatteryService.h>
 #include <utils/String8.h>
 #include <utils/Vector.h>
@@ -24,6 +26,19 @@
 #include <healthd/healthd.h>
 
 namespace android {
+namespace hardware {
+namespace health {
+namespace V1_0 {
+struct HealthInfo;
+}  // namespace V1_0
+namespace V2_0 {
+struct HealthInfo;
+}  // namespace V2_0
+namespace V2_1 {
+struct HealthInfo;
+}  // namespace V2_1
+}  // namespace health
+}  // namespace hardware
 
 class BatteryMonitor {
   public:
@@ -37,12 +52,19 @@
     };
 
     BatteryMonitor();
+    ~BatteryMonitor();
     void init(struct healthd_config *hc);
-    bool update(void);
     int getChargeStatus();
     status_t getProperty(int id, struct BatteryProperty *val);
     void dumpState(int fd);
-    friend struct BatteryProperties getBatteryProperties(BatteryMonitor* batteryMonitor);
+
+    const android::hardware::health::V1_0::HealthInfo& getHealthInfo_1_0() const;
+    const android::hardware::health::V2_0::HealthInfo& getHealthInfo_2_0() const;
+    const android::hardware::health::V2_1::HealthInfo& getHealthInfo_2_1() const;
+
+    void updateValues(void);
+    void logValues(void);
+    bool isChargerOnline();
 
   private:
     struct healthd_config *mHealthdConfig;
@@ -50,10 +72,8 @@
     bool mBatteryDevicePresent;
     int mBatteryFixedCapacity;
     int mBatteryFixedTemperature;
-    struct BatteryProperties props;
+    std::unique_ptr<android::hardware::health::V2_1::HealthInfo> mHealthInfo;
 
-    int getBatteryStatus(const char* status);
-    int getBatteryHealth(const char* status);
     int readFromFile(const String8& path, std::string* buf);
     PowerSupplyType readPowerSupplyType(const String8& path);
     bool getBooleanField(const String8& path);
diff --git a/init/Android.bp b/init/Android.bp
index 3233cc3..9529617 100644
--- a/init/Android.bp
+++ b/init/Android.bp
@@ -62,28 +62,26 @@
         },
     },
     static_libs: [
-        "libseccomp_policy",
         "libavb",
         "libc++fs",
         "libcgrouprc_format",
+        "liblmkd_utils",
         "libmodprobe",
         "libprotobuf-cpp-lite",
         "libpropertyinfoserializer",
         "libpropertyinfoparser",
+        "libsnapshot_init",
     ],
     shared_libs: [
         "libbacktrace",
         "libbase",
         "libbootloader_message",
         "libcutils",
-        "libcrypto",
         "libdl",
         "libext4_utils",
         "libfs_mgr",
-        "libfscrypt",
         "libgsi",
         "libhidl-gen-utils",
-        "libjsoncpp",
         "libkeyutils",
         "liblog",
         "liblogwrap",
@@ -108,7 +106,6 @@
         "action.cpp",
         "action_manager.cpp",
         "action_parser.cpp",
-        "boringssl_self_test.cpp",
         "bootchart.cpp",
         "builtins.cpp",
         "capabilities.cpp",
@@ -117,10 +114,12 @@
         "firmware_handler.cpp",
         "first_stage_init.cpp",
         "first_stage_mount.cpp",
+        "fscrypt_init_extensions.cpp",
         "import_parser.cpp",
         "init.cpp",
         "interface_utils.cpp",
         "keychords.cpp",
+        "lmkd_service.cpp",
         "modalias_handler.cpp",
         "mount_handler.cpp",
         "mount_namespace.cpp",
@@ -128,6 +127,7 @@
         "persistent_properties.cpp",
         "persistent_properties.proto",
         "property_service.cpp",
+        "property_service.proto",
         "property_type.cpp",
         "reboot.cpp",
         "reboot_utils.cpp",
@@ -152,6 +152,7 @@
     whole_static_libs: [
         "libcap",
         "com.android.sysprop.apex",
+        "com.android.sysprop.init",
     ],
     header_libs: ["bootimg_headers"],
     proto: {
@@ -185,9 +186,11 @@
     static_libs: ["libinit"],
     required: [
         "e2fsdroid",
+        "init.rc",
         "mke2fs",
         "sload_f2fs",
         "make_f2fs",
+        "ueventd.rc",
     ],
     srcs: ["main.cpp"],
     symlinks: ["ueventd"],
@@ -206,11 +209,23 @@
 // ------------------------------------------------------------------------------
 
 cc_test {
-    name: "init_tests",
+    name: "CtsInitTestCases",
     defaults: ["init_defaults"],
-    compile_multilib: "first",
+    require_root: true,
+
+    compile_multilib: "both",
+    multilib: {
+        lib32: {
+            suffix: "32",
+        },
+        lib64: {
+            suffix: "64",
+        },
+    },
+
     srcs: [
         "devices_test.cpp",
+        "firmware_handler_test.cpp",
         "init_test.cpp",
         "keychords_test.cpp",
         "persistent_properties_test.cpp",
@@ -225,7 +240,12 @@
         "util_test.cpp",
     ],
     static_libs: ["libinit"],
-    test_suites: ["device-tests"],
+
+    test_suites: [
+        "cts",
+        "device-tests",
+        "vts",
+    ],
 }
 
 cc_benchmark {
@@ -264,12 +284,14 @@
     static_libs: [
         "libbase",
         "libselinux",
+        "libpropertyinfoserializer",
+        "libpropertyinfoparser",
     ],
     whole_static_libs: ["libcap"],
     shared_libs: [
         "libcutils",
         "libhidl-gen-utils",
-        "libjsoncpp",
+        "libhidlmetadata",
         "liblog",
         "libprocessgroup",
         "libprotobuf-cpp-lite",
@@ -287,6 +309,7 @@
         "host_import_parser.cpp",
         "host_init_verifier.cpp",
         "parser.cpp",
+        "property_type.cpp",
         "rlimit_parser.cpp",
         "tokenizer.cpp",
         "service.cpp",
diff --git a/init/Android.mk b/init/Android.mk
index 006e1bf..ee2d89a 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -73,9 +73,8 @@
 LOCAL_REQUIRED_MODULES := \
    adb_debug.prop \
 
-# Set up the same mount points on the ramdisk that system-as-root contains.
+# Set up the directories that first stage init mounts on.
 LOCAL_POST_INSTALL_CMD := mkdir -p \
-    $(TARGET_RAMDISK_OUT)/apex \
     $(TARGET_RAMDISK_OUT)/debug_ramdisk \
     $(TARGET_RAMDISK_OUT)/dev \
     $(TARGET_RAMDISK_OUT)/mnt \
@@ -91,8 +90,6 @@
     libsquashfs_utils \
     liblogwrap \
     libext4_utils \
-    libfscrypt \
-    libseccomp_policy \
     libcrypto_utils \
     libsparse \
     libavb \
@@ -101,7 +98,7 @@
     libcutils \
     libbase \
     liblog \
-    libcrypto \
+    libcrypto_static \
     libdl \
     libz \
     libselinux \
@@ -109,11 +106,13 @@
     libgsi \
     libcom.android.sysprop.apex \
     liblzma \
-    libdexfile_support \
+    libdexfile_support_static \
     libunwindstack \
     libbacktrace \
     libmodprobe \
     libext2_uuid \
+    libprotobuf-cpp-lite \
+    libsnapshot_init \
 
 LOCAL_SANITIZE := signed-integer-overflow
 # First stage init is weird: it may start without stdout/stderr, and no /proc.
diff --git a/init/AndroidTest.xml b/init/AndroidTest.xml
new file mode 100644
index 0000000..667911d
--- /dev/null
+++ b/init/AndroidTest.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2019 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<configuration description="Config for CTS init test cases">
+    <option name="test-suite-tag" value="cts" />
+    <option name="config-descriptor:metadata" key="component" value="systems" />
+    <option name="config-descriptor:metadata" key="parameter" value="not_instant_app" />
+    <option name="config-descriptor:metadata" key="parameter" value="not_multi_abi" />
+    <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
+        <option name="cleanup" value="true" />
+        <option name="push" value="CtsInitTestCases->/data/local/tmp/CtsInitTestCases" />
+        <option name="append-bitness" value="true" />
+    </target_preparer>
+    <test class="com.android.tradefed.testtype.GTest" >
+        <option name="native-test-device-path" value="/data/local/tmp" />
+        <option name="module-name" value="CtsInitTestCases" />
+        <option name="runtime-hint" value="65s" />
+    </test>
+</configuration>
diff --git a/init/README.md b/init/README.md
index 2de76a9..b8300fa 100644
--- a/init/README.md
+++ b/init/README.md
@@ -170,6 +170,8 @@
   be changed by setting the "androidboot.console" kernel parameter. In
   all cases the leading "/dev/" should be omitted, so "/dev/tty0" would be
   specified as just "console tty0".
+  This option connects stdin, stdout, and stderr to the console. It is mutually exclusive with the
+  stdio_to_kmsg option, which only connects stdout and stderr to kmsg.
 
 `critical`
 > This is a device-critical service. If it exits more than four times in
@@ -263,6 +265,12 @@
 > Scheduling priority of the service process. This value has to be in range
   -20 to 19. Default priority is 0. Priority is set via setpriority().
 
+`reboot_on_failure <target>`
+> If this process cannot be started or if the process terminates with an exit code other than
+  CLD_EXITED or an status other than '0', reboot the system with the target specified in
+  _target_. _target_ takes the same format as the parameter to sys.powerctl. This is particularly
+  intended to be used with the `exec_start` builtin for any must-have checks during boot.
+
 `restart_period <seconds>`
 > If a non-oneshot service exits, it will be restarted at its start time plus
   this period. It defaults to 5s to rate limit crashing services.
@@ -307,6 +315,13 @@
   seclabel or computed based on the service executable file security context.
   For native executables see libcutils android\_get\_control\_socket().
 
+`stdio_to_kmsg`
+> Redirect stdout and stderr to /dev/kmsg_debug. This is useful for services that do not use native
+  Android logging during early boot and whose logs messages we want to capture. This is only enabled
+  when /dev/kmsg_debug is enabled, which is only enabled on userdebug and eng builds.
+  This is mutually exclusive with the console option, which additionally connects stdin to the
+  given console.
+
 `timeout_period <seconds>`
 > Provide a timeout after which point the service will be killed. The oneshot keyword is respected
   here, so oneshot services do not automatically restart, however all other services will.
@@ -490,12 +505,23 @@
 > Used to mark the point right after /data is mounted. Used to implement the
   `class_reset_post_data` and `class_start_post_data` commands.
 
-`mkdir <path> [mode] [owner] [group]`
+`mkdir <path> [<mode>] [<owner>] [<group>] [encryption=<action>] [key=<key>]`
 > Create a directory at _path_, optionally with the given mode, owner, and
   group. If not provided, the directory is created with permissions 755 and
   owned by the root user and root group. If provided, the mode, owner and group
   will be updated if the directory exists already.
 
+ > _action_ can be one of:
+  * `None`: take no encryption action; directory will be encrypted if parent is.
+  * `Require`: encrypt directory, abort boot process if encryption fails
+  * `Attempt`: try to set an encryption policy, but continue if it fails
+  * `DeleteIfNecessary`: recursively delete directory if necessary to set
+  encryption policy.
+
+  > _key_ can be one of:
+  * `ref`: use the systemwide DE key
+  * `per_boot_ref`: use the key freshly generated on each boot.
+
 `mount_all <fstab> [ <path> ]\* [--<option>]`
 > Calls fs\_mgr\_mount\_all on the given fs\_mgr-format fstab with optional
   options "early" and "late".
@@ -557,6 +583,7 @@
   Note that this is _not_ synchronous, and even if it were, there is
   no guarantee that the operating system's scheduler will execute the
   service sufficiently to guarantee anything about the service's status.
+  See the `exec_start` command for a synchronous version of `start`.
 
 > This creates an important consequence that if the service offers
   functionality to other services, such as providing a
@@ -769,6 +796,12 @@
 
 Debugging init
 --------------
+When a service starts from init, it may fail to `execv()` the service. This is not typical, and may
+point to an error happening in the linker as the new service is started. The linker in Android
+prints its logs to `logd` and `stderr`, so they are visible in `logcat`. If the error is encountered
+before it is possible to access `logcat`, the `stdio_to_kmsg` service option may be used to direct
+the logs that the linker prints to `stderr` to `kmsg`, where they can be read via a serial port.
+
 Launching init services without init is not recommended as init sets up a significant amount of
 environment (user, groups, security label, capabilities, etc) that is hard to replicate manually.
 
diff --git a/init/README.ueventd.md b/init/README.ueventd.md
new file mode 100644
index 0000000..053ebf8
--- /dev/null
+++ b/init/README.ueventd.md
@@ -0,0 +1,138 @@
+# Ueventd
+-------
+Ueventd manages `/dev`, sets permissions for `/sys`, and handles firmware uevents. It has default
+behavior described below, along with a scripting language that allows customizing this behavior,
+built on the same parser as init.
+
+Ueventd has one generic customization parameter, the size of rcvbuf_size for the ueventd socket. It
+is customized by the `uevent_socket_rcvbuf_size` parameter, which takes the format of
+
+    uevent_socket_rcvbuf_size <size>
+For example
+
+    uevent_socket_rcvbuf_size 16M
+Sets the uevent socket rcvbuf_size to 16 megabytes.
+
+## /dev
+----
+Ueventd listens to the kernel uevent sockets and creates/deletes nodes in `/dev` based on the
+incoming add/remove uevents. It defaults to using `0600` mode and `root` user/group. It always
+creates the nodes with the SELabel from the current loaded SEPolicy. It has three default behaviors
+for the node path:
+
+  1. Block devices are created as `/dev/block/<basename uevent DEVPATH>`. There are symlinks created
+     to this node at `/dev/block/<type>/<parent device>/<basename uevent DEVPATH>`,
+     `/dev/block/<type>/<parent device>/by-name/<uevent PARTNAME>`, and `/dev/block/by-name/<uevent
+     PARTNAME>` if the device is a boot device.
+  2. USB devices are created as `/dev/<uevent DEVNAME>` if `DEVNAME` was specified for the uevent,
+     otherwise as `/dev/bus/usb/<bus_id>/<device_id>` where `bus_id` is `uevent MINOR / 128 + 1` and
+     `device_id` is `uevent MINOR % 128 + 1`.
+  3. All other devices are created as `/dev/<basename uevent DEVPATH>`
+
+The permissions can be modified using a ueventd.rc script and a line that beings with `/dev`. These
+lines take the format of
+
+    devname mode uid gid
+For example
+
+    /dev/null 0666 root root
+When `/dev/null` is created, its mode will be set to `0666`, its user to `root` and its group to
+`root`.
+
+The path can be modified using a ueventd.rc script and a `subsystem` section. There are three to set
+for a subsystem: the subsystem name, which device name to use, and which directory to place the
+device in. The section takes the below format of
+
+    subsystem <subsystem_name>
+      devname uevent_devname|uevent_devpath
+      [dirname <directory>]
+
+`subsystem_name` is used to match uevent `SUBSYSTEM` value
+
+`devname` takes one of two options
+  1. `uevent_devname` specifies that the name of the node will be the uevent `DEVNAME`
+  2. `uevent_devpath` specified that the name of the node will be basename uevent `DEVPATH`
+
+`dirname` is an optional parameter that specifies a directory within `/dev` where the node will be
+created.
+
+For example
+
+    subsystem sound
+      devname uevent_devpath
+      dirname /dev/snd
+Indicates that all uevents with `SUBSYSTEM=sound` will create nodes as `/dev/snd/<basename uevent
+DEVPATH>`.
+
+## /sys
+----
+Ueventd by default takes no action for `/sys`, however it can be instructed to set permissions for
+certain files in `/sys` when matching uevents are generated. This is done using a ueventd.rc script
+and a line that begins with `/sys`. These lines take the format of
+
+    nodename attr mode uid gid
+For example
+
+    /sys/devices/system/cpu/cpu* cpufreq/scaling_max_freq 0664 system system
+When a uevent that matches the pattern `/sys/devices/system/cpu/cpu*` is sent, the matching sysfs
+attribute, `cpufreq/scaling_max_freq`, will have its mode set to `0664`, its user to to `system` and
+its group set to `system`.
+
+Note that `*` matches as a wildcard and can be used anywhere in a path.
+
+## Firmware loading
+----------------
+Ueventd by default serves firmware requests by searching through a list of firmware directories
+for a file matching the uevent `FIRMWARE`. It then forks a process to serve this firmware to the
+kernel.
+
+The list of firmware directories is customized by a `firmware_directories` line in a ueventd.rc
+file. This line takes the format of
+
+    firmware_directories <firmware_directory> [ <firmware_directory> ]*
+For example
+
+    firmware_directories /etc/firmware/ /odm/firmware/ /vendor/firmware/ /firmware/image/
+Adds those 4 directories, in that order to the list of firmware directories that will be tried by
+ueventd. Note that this option always accumulates to the list; it is not possible to remove previous
+entries.
+
+Ueventd will wait until after `post-fs` in init, to keep retrying before believing the firmwares are
+not present.
+
+The exact firmware file to be served can be customized by running an external program by a
+`external_firmware_handler` line in a ueventd.rc file. This line takes the format of
+
+    external_firmware_handler <devpath> <user name to run as> <path to external program>
+For example
+
+    external_firmware_handler /devices/leds/red/firmware/coeffs.bin system /vendor/bin/led_coeffs.bin
+Will launch `/vendor/bin/led_coeffs.bin` as the system user instead of serving the default firmware
+for `/devices/leds/red/firmware/coeffs.bin`.
+
+Ueventd will provide the uevent `DEVPATH` and `FIRMWARE` to this external program on the environment
+via environment variables with the same names. Ueventd will use the string written to stdout as the
+new name of the firmware to load. It will still look for the new firmware in the list of firmware
+directories stated above. It will also reject file names with `..` in them, to prevent leaving these
+directories. If stdout cannot be read, or the program returns with any exit code other than
+`EXIT_SUCCESS`, or the program crashes, the default firmware from the uevent will be loaded.
+
+Ueventd will additionally log all messages sent to stderr from the external program to the serial
+console after the external program has exited.
+
+## Coldboot
+--------
+Ueventd must create devices in `/dev` for all devices that have already sent their uevents before
+ueventd has started. To do so, when ueventd is started it does what it calls a 'coldboot' on `/sys`,
+in which it writes 'add' to every 'uevent' file that it finds in `/sys/class`, `/sys/block`, and
+`/sys/devices`. This causes the kernel to regenerate the uevents for these paths, and thus for
+ueventd to create the nodes.
+
+For boot time purposes, this is done in parallel across a set of child processes. `ueventd.cpp` in
+this directory contains documentation on how the parallelization is done.
+
+There is an option to parallelize the restorecon function during cold boot as well. This should only
+be done for devices that do not use genfscon, which is the recommended method for labeling sysfs
+nodes. To enable this option, use the below line in a ueventd.rc script:
+
+    parallel_restorecon enabled
diff --git a/init/action.cpp b/init/action.cpp
index 1a66eee..f05fa7c 100644
--- a/init/action.cpp
+++ b/init/action.cpp
@@ -180,28 +180,32 @@
 // It takes an optional (name, value) pair, which if provided must
 // be present in property_triggers_; it skips the check of the current
 // property value for this pair.
-bool Action::CheckPropertyTriggers(const std::string& name,
-                                   const std::string& value) const {
+bool Action::CheckPropertyTriggers(const std::string& name, const std::string& value) const {
     if (property_triggers_.empty()) {
         return true;
     }
 
-    bool found = name.empty();
-    for (const auto& [trigger_name, trigger_value] : property_triggers_) {
-        if (trigger_name == name) {
-            if (trigger_value != "*" && trigger_value != value) {
-                return false;
-            } else {
-                found = true;
-            }
-        } else {
-            std::string prop_val = android::base::GetProperty(trigger_name, "");
-            if (prop_val.empty() || (trigger_value != "*" && trigger_value != prop_val)) {
-                return false;
-            }
+    if (!name.empty()) {
+        auto it = property_triggers_.find(name);
+        if (it == property_triggers_.end()) {
+            return false;
+        }
+        const auto& trigger_value = it->second;
+        if (trigger_value != "*" && trigger_value != value) {
+            return false;
         }
     }
-    return found;
+
+    for (const auto& [trigger_name, trigger_value] : property_triggers_) {
+        if (trigger_name != name) {
+            std::string prop_value = android::base::GetProperty(trigger_name, "");
+            if (trigger_value == "*" && !prop_value.empty()) {
+                continue;
+            }
+            if (trigger_value != prop_value) return false;
+        }
+    }
+    return true;
 }
 
 bool Action::CheckEvent(const EventTrigger& event_trigger) const {
diff --git a/init/action_parser.cpp b/init/action_parser.cpp
index ff20e43..a8e1e09 100644
--- a/init/action_parser.cpp
+++ b/init/action_parser.cpp
@@ -16,11 +16,14 @@
 
 #include "action_parser.h"
 
+#include <ctype.h>
+
 #include <android-base/properties.h>
 #include <android-base/strings.h>
 
 #if defined(__ANDROID__)
 #include "property_service.h"
+#include "selinux.h"
 #else
 #include "host_init_stubs.h"
 #endif
@@ -77,6 +80,17 @@
     return {};
 }
 
+Result<void> ValidateEventTrigger(const std::string& event_trigger) {
+    if (SelinuxGetVendorAndroidVersion() >= __ANDROID_API_R__) {
+        for (const char& c : event_trigger) {
+            if (c != '_' && c != '-' && !std::isalnum(c)) {
+                return Error() << "Illegal character '" << c << "' in '" << event_trigger << "'";
+            }
+        }
+    }
+    return {};
+}
+
 Result<void> ParseTriggers(const std::vector<std::string>& args, Subcontext* subcontext,
                            std::string* event_trigger,
                            std::map<std::string, std::string>* property_triggers) {
@@ -103,6 +117,9 @@
             if (!event_trigger->empty()) {
                 return Error() << "multiple event triggers are not allowed";
             }
+            if (auto result = ValidateEventTrigger(args[i]); !result) {
+                return result;
+            }
 
             *event_trigger = args[i];
         }
@@ -121,13 +138,8 @@
     }
 
     Subcontext* action_subcontext = nullptr;
-    if (subcontexts_) {
-        for (auto& subcontext : *subcontexts_) {
-            if (StartsWith(filename, subcontext.path_prefix())) {
-                action_subcontext = &subcontext;
-                break;
-            }
-        }
+    if (subcontext_ && subcontext_->PathMatchesSubcontext(filename)) {
+        action_subcontext = subcontext_;
     }
 
     std::string event_trigger;
diff --git a/init/action_parser.h b/init/action_parser.h
index 2fe9983..3000132 100644
--- a/init/action_parser.h
+++ b/init/action_parser.h
@@ -30,8 +30,8 @@
 
 class ActionParser : public SectionParser {
   public:
-    ActionParser(ActionManager* action_manager, std::vector<Subcontext>* subcontexts)
-        : action_manager_(action_manager), subcontexts_(subcontexts), action_(nullptr) {}
+    ActionParser(ActionManager* action_manager, Subcontext* subcontext)
+        : action_manager_(action_manager), subcontext_(subcontext), action_(nullptr) {}
     Result<void> ParseSection(std::vector<std::string>&& args, const std::string& filename,
                               int line) override;
     Result<void> ParseLineSection(std::vector<std::string>&& args, int line) override;
@@ -39,7 +39,7 @@
 
   private:
     ActionManager* action_manager_;
-    std::vector<Subcontext>* subcontexts_;
+    Subcontext* subcontext_;
     std::unique_ptr<Action> action_;
 };
 
diff --git a/init/boringssl_self_test.cpp b/init/boringssl_self_test.cpp
deleted file mode 100644
index 759eb43..0000000
--- a/init/boringssl_self_test.cpp
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "boringssl_self_test.h"
-
-#include <android-base/logging.h>
-#include <cutils/android_reboot.h>
-#include <openssl/crypto.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-namespace android {
-namespace init {
-
-Result<void> StartBoringSslSelfTest(const BuiltinArguments&) {
-    pid_t id = fork();
-
-    if (id == 0) {
-        if (BORINGSSL_self_test() != 1) {
-            LOG(INFO) << "BoringSSL crypto self tests failed";
-
-            // This check has failed, so the device should refuse
-            // to boot. Rebooting to bootloader to wait for
-            // further action from the user.
-
-            int result = android_reboot(ANDROID_RB_RESTART2, 0,
-                                        "bootloader,boringssl-self-check-failed");
-            if (result != 0) {
-                LOG(ERROR) << "Failed to reboot into bootloader";
-            }
-        }
-
-        _exit(0);
-    } else if (id == -1) {
-        // Failed to fork, so cannot run the test. Refuse to continue.
-        PLOG(FATAL) << "Failed to fork for BoringSSL self test";
-    }
-
-    return {};
-}
-
-}  // namespace init
-}  // namespace android
diff --git a/init/builtins.cpp b/init/builtins.cpp
index a2d782b..62a19ab 100644
--- a/init/builtins.cpp
+++ b/init/builtins.cpp
@@ -42,7 +42,10 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
+#include <memory>
+
 #include <ApexProperties.sysprop.h>
+#include <InitProperties.sysprop.h>
 #include <android-base/chrono_utils.h>
 #include <android-base/file.h>
 #include <android-base/logging.h>
@@ -55,7 +58,6 @@
 #include <cutils/android_reboot.h>
 #include <fs_mgr.h>
 #include <fscrypt/fscrypt.h>
-#include <fscrypt/fscrypt_init_extensions.h>
 #include <libgsi/libgsi.h>
 #include <selinux/android.h>
 #include <selinux/label.h>
@@ -64,6 +66,8 @@
 
 #include "action_manager.h"
 #include "bootchart.h"
+#include "builtin_arguments.h"
+#include "fscrypt_init_extensions.h"
 #include "init.h"
 #include "mount_namespace.h"
 #include "parser.h"
@@ -80,6 +84,9 @@
 using namespace std::literals::string_literals;
 
 using android::base::Basename;
+using android::base::SetProperty;
+using android::base::StartsWith;
+using android::base::StringPrintf;
 using android::base::unique_fd;
 using android::fs_mgr::Fstab;
 using android::fs_mgr::ReadFstabFromFile;
@@ -136,7 +143,7 @@
     if (!write_bootloader_message(options, &err)) {
         return Error() << "Failed to set bootloader message: " << err;
     }
-    property_set("sys.powerctl", "reboot,recovery");
+    trigger_shutdown("reboot,recovery");
     return {};
 }
 
@@ -353,59 +360,61 @@
     return {};
 }
 
-// mkdir <path> [mode] [owner] [group]
-static Result<void> do_mkdir(const BuiltinArguments& args) {
-    mode_t mode = 0755;
-    if (args.size() >= 3) {
-        mode = std::strtoul(args[2].c_str(), 0, 8);
+static Result<void> make_dir_with_options(const MkdirOptions& options) {
+    std::string ref_basename;
+    if (options.ref_option == "ref") {
+        ref_basename = fscrypt_key_ref;
+    } else if (options.ref_option == "per_boot_ref") {
+        ref_basename = fscrypt_key_per_boot_ref;
+    } else {
+        return Error() << "Unknown key option: '" << options.ref_option << "'";
     }
 
-    if (!make_dir(args[1], mode)) {
-        /* chmod in case the directory already exists */
-        if (errno == EEXIST) {
-            if (fchmodat(AT_FDCWD, args[1].c_str(), mode, AT_SYMLINK_NOFOLLOW) == -1) {
-                return ErrnoError() << "fchmodat() failed";
-            }
-        } else {
-            return ErrnoErrorIgnoreEnoent() << "mkdir() failed";
+    struct stat mstat;
+    if (lstat(options.target.c_str(), &mstat) != 0) {
+        if (errno != ENOENT) {
+            return ErrnoError() << "lstat() failed on " << options.target;
+        }
+        if (!make_dir(options.target, options.mode)) {
+            return ErrnoErrorIgnoreEnoent() << "mkdir() failed on " << options.target;
+        }
+        if (lstat(options.target.c_str(), &mstat) != 0) {
+            return ErrnoError() << "lstat() failed on new " << options.target;
         }
     }
-
-    if (args.size() >= 4) {
-        auto uid = DecodeUid(args[3]);
-        if (!uid) {
-            return Error() << "Unable to decode UID for '" << args[3] << "': " << uid.error();
+    if (!S_ISDIR(mstat.st_mode)) {
+        return Error() << "Not a directory on " << options.target;
+    }
+    bool needs_chmod = (mstat.st_mode & ~S_IFMT) != options.mode;
+    if ((options.uid != static_cast<uid_t>(-1) && options.uid != mstat.st_uid) ||
+        (options.gid != static_cast<gid_t>(-1) && options.gid != mstat.st_gid)) {
+        if (lchown(options.target.c_str(), options.uid, options.gid) == -1) {
+            return ErrnoError() << "lchown failed on " << options.target;
         }
-        Result<gid_t> gid = -1;
-
-        if (args.size() == 5) {
-            gid = DecodeUid(args[4]);
-            if (!gid) {
-                return Error() << "Unable to decode GID for '" << args[4] << "': " << gid.error();
-            }
-        }
-
-        if (lchown(args[1].c_str(), *uid, *gid) == -1) {
-            return ErrnoError() << "lchown failed";
-        }
-
-        /* chown may have cleared S_ISUID and S_ISGID, chmod again */
-        if (mode & (S_ISUID | S_ISGID)) {
-            if (fchmodat(AT_FDCWD, args[1].c_str(), mode, AT_SYMLINK_NOFOLLOW) == -1) {
-                return ErrnoError() << "fchmodat failed";
-            }
+        // chown may have cleared S_ISUID and S_ISGID, chmod again
+        needs_chmod = true;
+    }
+    if (needs_chmod) {
+        if (fchmodat(AT_FDCWD, options.target.c_str(), options.mode, AT_SYMLINK_NOFOLLOW) == -1) {
+            return ErrnoError() << "fchmodat() failed on " << options.target;
         }
     }
-
     if (fscrypt_is_native()) {
-        if (fscrypt_set_directory_policy(args[1].c_str())) {
+        if (!FscryptSetDirectoryPolicy(ref_basename, options.fscrypt_action, options.target)) {
             return reboot_into_recovery(
-                {"--prompt_and_wipe_data", "--reason=set_policy_failed:"s + args[1]});
+                    {"--prompt_and_wipe_data", "--reason=set_policy_failed:"s + options.target});
         }
     }
     return {};
 }
 
+// mkdir <path> [mode] [owner] [group] [<option> ...]
+static Result<void> do_mkdir(const BuiltinArguments& args) {
+    auto options = ParseMkdir(args.args);
+    if (!options) return options.error();
+    return make_dir_with_options(*options);
+}
+
 /* umount <path> */
 static Result<void> do_umount(const BuiltinArguments& args) {
     if (umount(args[1].c_str()) < 0) {
@@ -538,21 +547,35 @@
  *
  * return code is processed based on input code
  */
-static Result<void> queue_fs_event(int code) {
+static Result<void> queue_fs_event(int code, bool userdata_remount) {
     if (code == FS_MGR_MNTALL_DEV_NEEDS_ENCRYPTION) {
+        if (userdata_remount) {
+            // FS_MGR_MNTALL_DEV_NEEDS_ENCRYPTION should only happen on FDE devices. Since we don't
+            // support userdata remount on FDE devices, this should never been triggered. Time to
+            // panic!
+            LOG(ERROR) << "Userdata remount is not supported on FDE devices. How did you get here?";
+            trigger_shutdown("reboot,requested-userdata-remount-on-fde-device");
+        }
         ActionManager::GetInstance().QueueEventTrigger("encrypt");
         return {};
     } else if (code == FS_MGR_MNTALL_DEV_MIGHT_BE_ENCRYPTED) {
-        property_set("ro.crypto.state", "encrypted");
-        property_set("ro.crypto.type", "block");
+        if (userdata_remount) {
+            // FS_MGR_MNTALL_DEV_MIGHT_BE_ENCRYPTED should only happen on FDE devices. Since we
+            // don't support userdata remount on FDE devices, this should never been triggered.
+            // Time to panic!
+            LOG(ERROR) << "Userdata remount is not supported on FDE devices. How did you get here?";
+            trigger_shutdown("reboot,requested-userdata-remount-on-fde-device");
+        }
+        SetProperty("ro.crypto.state", "encrypted");
+        SetProperty("ro.crypto.type", "block");
         ActionManager::GetInstance().QueueEventTrigger("defaultcrypto");
         return {};
     } else if (code == FS_MGR_MNTALL_DEV_NOT_ENCRYPTED) {
-        property_set("ro.crypto.state", "unencrypted");
+        SetProperty("ro.crypto.state", "unencrypted");
         ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
         return {};
     } else if (code == FS_MGR_MNTALL_DEV_NOT_ENCRYPTABLE) {
-        property_set("ro.crypto.state", "unsupported");
+        SetProperty("ro.crypto.state", "unsupported");
         ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
         return {};
     } else if (code == FS_MGR_MNTALL_DEV_NEEDS_RECOVERY) {
@@ -565,33 +588,33 @@
         return reboot_into_recovery(options);
         /* If reboot worked, there is no return. */
     } else if (code == FS_MGR_MNTALL_DEV_FILE_ENCRYPTED) {
-        if (fscrypt_install_keyring()) {
-            return Error() << "fscrypt_install_keyring() failed";
+        if (!FscryptInstallKeyring()) {
+            return Error() << "FscryptInstallKeyring() failed";
         }
-        property_set("ro.crypto.state", "encrypted");
-        property_set("ro.crypto.type", "file");
+        SetProperty("ro.crypto.state", "encrypted");
+        SetProperty("ro.crypto.type", "file");
 
         // Although encrypted, we have device key, so we do not need to
         // do anything different from the nonencrypted case.
         ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
         return {};
     } else if (code == FS_MGR_MNTALL_DEV_IS_METADATA_ENCRYPTED) {
-        if (fscrypt_install_keyring()) {
-            return Error() << "fscrypt_install_keyring() failed";
+        if (!FscryptInstallKeyring()) {
+            return Error() << "FscryptInstallKeyring() failed";
         }
-        property_set("ro.crypto.state", "encrypted");
-        property_set("ro.crypto.type", "file");
+        SetProperty("ro.crypto.state", "encrypted");
+        SetProperty("ro.crypto.type", "file");
 
         // Although encrypted, vold has already set the device up, so we do not need to
         // do anything different from the nonencrypted case.
         ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
         return {};
     } else if (code == FS_MGR_MNTALL_DEV_NEEDS_METADATA_ENCRYPTION) {
-        if (fscrypt_install_keyring()) {
-            return Error() << "fscrypt_install_keyring() failed";
+        if (!FscryptInstallKeyring()) {
+            return Error() << "FscryptInstallKeyring() failed";
         }
-        property_set("ro.crypto.state", "encrypted");
-        property_set("ro.crypto.type", "file");
+        SetProperty("ro.crypto.state", "encrypted");
+        SetProperty("ro.crypto.type", "file");
 
         // Although encrypted, vold has already set the device up, so we do not need to
         // do anything different from the nonencrypted case.
@@ -605,6 +628,8 @@
     return Error() << "Invalid code: " << code;
 }
 
+static int initial_mount_fstab_return_code = -1;
+
 /* mount_all <fstab> [ <path> ]* [--<options>]*
  *
  * This function might request a reboot, in which case it will
@@ -641,12 +666,8 @@
         return Error() << "Could not read fstab";
     }
 
-    auto mount_fstab_return_code =
-            CallFunctionAndHandleProperties(fs_mgr_mount_all, &fstab, mount_mode);
-    if (!mount_fstab_return_code) {
-        return Error() << "Could not call fs_mgr_mount_all(): " << mount_fstab_return_code.error();
-    }
-    property_set(prop_name, std::to_string(t.duration().count()));
+    auto mount_fstab_return_code = fs_mgr_mount_all(&fstab, mount_mode);
+    SetProperty(prop_name, std::to_string(t.duration().count()));
 
     if (import_rc && SelinuxGetVendorAndroidVersion() <= __ANDROID_API_Q__) {
         /* Paths of .rc files are specified at the 2nd argument and beyond */
@@ -656,7 +677,8 @@
     if (queue_event) {
         /* queue_fs_event will queue event based on mount_fstab return code
          * and return processed return code*/
-        auto queue_fs_result = queue_fs_event(*mount_fstab_return_code);
+        initial_mount_fstab_return_code = mount_fstab_return_code;
+        auto queue_fs_result = queue_fs_event(mount_fstab_return_code, false);
         if (!queue_fs_result) {
             return Error() << "queue_fs_event() failed: " << queue_fs_result.error();
         }
@@ -672,13 +694,8 @@
         return Error() << "Could not read fstab";
     }
 
-    auto result = CallFunctionAndHandleProperties(fs_mgr_umount_all, &fstab);
-    if (!result) {
-        return Error() << "Could not call fs_mgr_mount_all() " << result.error();
-    }
-
-    if (*result != 0) {
-        return Error() << "fs_mgr_mount_all() failed: " << *result;
+    if (auto result = fs_mgr_umount_all(&fstab); result != 0) {
+        return Error() << "umount_fstab() failed " << result;
     }
     return {};
 }
@@ -689,20 +706,24 @@
         return Error() << "Could not read fstab '" << args[1] << "'";
     }
 
-    auto result = CallFunctionAndHandleProperties(fs_mgr_swapon_all, fstab);
-    if (!result) {
-        return Error() << "Could not call fs_mgr_swapon_all() " << result.error();
-    }
-
-    if (*result == 0) {
-        return Error() << "fs_mgr_swapon_all() failed.";
+    if (!fs_mgr_swapon_all(fstab)) {
+        return Error() << "fs_mgr_swapon_all() failed";
     }
 
     return {};
 }
 
 static Result<void> do_setprop(const BuiltinArguments& args) {
-    property_set(args[1], args[2]);
+    if (StartsWith(args[1], "ctl.")) {
+        return Error()
+               << "Cannot set ctl. properties from init; call the Service functions directly";
+    }
+    if (args[1] == kRestoreconProperty) {
+        return Error() << "Cannot set '" << kRestoreconProperty
+                       << "' from init; use the restorecon builtin directly";
+    }
+
+    SetProperty(args[1], args[2]);
     return {};
 }
 
@@ -816,7 +837,7 @@
         // To be consistent in vboot 1.0 and vboot 2.0 (AVB), use "system" for the partition even
         // for system as root, so it has property [partition.system.verified].
         std::string partition = entry.mount_point == "/" ? "system" : Basename(entry.mount_point);
-        property_set("partition." + partition + ".verified", std::to_string(mode));
+        SetProperty("partition." + partition + ".verified", std::to_string(mode));
     }
 
     return {};
@@ -1017,7 +1038,20 @@
 }
 
 static Result<void> do_load_persist_props(const BuiltinArguments& args) {
-    load_persist_props();
+    // Devices with FDE have load_persist_props called twice; the first time when the temporary
+    // /data partition is mounted and then again once /data is truly mounted.  We do not want to
+    // read persistent properties from the temporary /data partition or mark persistent properties
+    // as having been loaded during the first call, so we return in that case.
+    std::string crypto_state = android::base::GetProperty("ro.crypto.state", "");
+    std::string crypto_type = android::base::GetProperty("ro.crypto.type", "");
+    if (crypto_state == "encrypted" && crypto_type == "block") {
+        static size_t num_calls = 0;
+        if (++num_calls == 1) return {};
+    }
+
+    SendLoadPersistentPropertiesMessage();
+
+    start_waiting_for_property("ro.persistent_properties.ready", "true");
     return {};
 }
 
@@ -1064,34 +1098,64 @@
     return android::base::GetProperty("ro.crypto.type", "") == "file";
 }
 
-static Result<void> ExecWithRebootOnFailure(const std::string& reboot_reason,
-                                            const BuiltinArguments& args) {
-    auto service = Service::MakeTemporaryOneshotService(args.args);
+static Result<void> ExecWithFunctionOnFailure(const std::vector<std::string>& args,
+                                              std::function<void(const std::string&)> function) {
+    auto service = Service::MakeTemporaryOneshotService(args);
     if (!service) {
-        return Error() << "Could not create exec service: " << service.error();
+        function("MakeTemporaryOneshotService failed: " + service.error().message());
     }
-    (*service)->AddReapCallback([reboot_reason](const siginfo_t& siginfo) {
+    (*service)->AddReapCallback([function](const siginfo_t& siginfo) {
         if (siginfo.si_code != CLD_EXITED || siginfo.si_status != 0) {
-            // TODO (b/122850122): support this in gsi
-            if (fscrypt_is_native() && !android::gsi::IsGsiRunning()) {
-                LOG(ERROR) << "Rebooting into recovery, reason: " << reboot_reason;
-                if (auto result = reboot_into_recovery(
-                            {"--prompt_and_wipe_data", "--reason="s + reboot_reason});
-                    !result) {
-                    LOG(FATAL) << "Could not reboot into recovery: " << result.error();
-                }
-            } else {
-                LOG(ERROR) << "Failure (reboot suppressed): " << reboot_reason;
-            }
+            function(StringPrintf("Exec service failed, status %d", siginfo.si_status));
         }
     });
     if (auto result = (*service)->ExecStart(); !result) {
-        return Error() << "Could not start exec service: " << result.error();
+        function("ExecStart failed: " + result.error().message());
     }
     ServiceList::GetInstance().AddService(std::move(*service));
     return {};
 }
 
+static Result<void> ExecVdcRebootOnFailure(const std::string& vdc_arg) {
+    auto reboot_reason = vdc_arg + "_failed";
+
+    auto reboot = [reboot_reason](const std::string& message) {
+        // TODO (b/122850122): support this in gsi
+        if (fscrypt_is_native() && !android::gsi::IsGsiRunning()) {
+            LOG(ERROR) << message << ": Rebooting into recovery, reason: " << reboot_reason;
+            if (auto result = reboot_into_recovery(
+                        {"--prompt_and_wipe_data", "--reason="s + reboot_reason});
+                !result) {
+                LOG(FATAL) << "Could not reboot into recovery: " << result.error();
+            }
+        } else {
+            LOG(ERROR) << "Failure (reboot suppressed): " << reboot_reason;
+        }
+    };
+
+    std::vector<std::string> args = {"exec", "/system/bin/vdc", "--wait", "cryptfs", vdc_arg};
+    return ExecWithFunctionOnFailure(args, reboot);
+}
+
+static Result<void> do_remount_userdata(const BuiltinArguments& args) {
+    if (initial_mount_fstab_return_code == -1) {
+        return Error() << "Calling remount_userdata too early";
+    }
+    Fstab fstab;
+    if (!ReadDefaultFstab(&fstab)) {
+        // TODO(b/135984674): should we reboot here?
+        return Error() << "Failed to read fstab";
+    }
+    // TODO(b/135984674): check that fstab contains /data.
+    if (auto rc = fs_mgr_remount_userdata_into_checkpointing(&fstab); rc < 0) {
+        trigger_shutdown("reboot,mount-userdata-failed");
+    }
+    if (auto result = queue_fs_event(initial_mount_fstab_return_code, true); !result) {
+        return Error() << "queue_fs_event() failed: " << result.error();
+    }
+    return {};
+}
+
 static Result<void> do_installkey(const BuiltinArguments& args) {
     if (!is_file_crypto()) return {};
 
@@ -1099,15 +1163,11 @@
     if (!make_dir(unencrypted_dir, 0700) && errno != EEXIST) {
         return ErrnoError() << "Failed to create " << unencrypted_dir;
     }
-    return ExecWithRebootOnFailure(
-        "enablefilecrypto_failed",
-        {{"exec", "/system/bin/vdc", "--wait", "cryptfs", "enablefilecrypto"}, args.context});
+    return ExecVdcRebootOnFailure("enablefilecrypto");
 }
 
 static Result<void> do_init_user0(const BuiltinArguments& args) {
-    return ExecWithRebootOnFailure(
-        "init_user0_failed",
-        {{"exec", "/system/bin/vdc", "--wait", "cryptfs", "init_user0"}, args.context});
+    return ExecVdcRebootOnFailure("init_user0");
 }
 
 static Result<void> do_mark_post_data(const BuiltinArguments& args) {
@@ -1116,7 +1176,7 @@
     return {};
 }
 
-static Result<void> do_parse_apex_configs(const BuiltinArguments& args) {
+static Result<void> parse_apex_configs() {
     glob_t glob_result;
     static constexpr char glob_pattern[] = "/apex/*/etc/*.rc";
     const int ret = glob(glob_pattern, GLOB_MARK, nullptr, &glob_result);
@@ -1125,7 +1185,7 @@
         return Error() << "glob pattern '" << glob_pattern << "' failed";
     }
     std::vector<std::string> configs;
-    Parser parser = CreateServiceOnlyParser(ServiceList::GetInstance());
+    Parser parser = CreateServiceOnlyParser(ServiceList::GetInstance(), true);
     for (size_t i = 0; i < glob_result.gl_pathc; i++) {
         std::string path = glob_result.gl_pathv[i];
         // Filter-out /apex/<name>@<ver> paths. The paths are bind-mounted to
@@ -1155,6 +1215,45 @@
     }
 }
 
+/*
+ * Creates a directory under /data/misc/apexdata/ for each APEX.
+ */
+static Result<void> create_apex_data_dirs() {
+    auto dirp = std::unique_ptr<DIR, int (*)(DIR*)>(opendir("/apex"), closedir);
+    if (!dirp) {
+        return ErrnoError() << "Unable to open apex directory";
+    }
+    struct dirent* entry;
+    while ((entry = readdir(dirp.get())) != nullptr) {
+        if (entry->d_type != DT_DIR) continue;
+
+        const char* name = entry->d_name;
+        // skip any starting with "."
+        if (name[0] == '.') continue;
+
+        if (strchr(name, '@') != nullptr) continue;
+
+        auto path = "/data/misc/apexdata/" + std::string(name);
+        auto system_uid = DecodeUid("system");
+        auto options =
+                MkdirOptions{path, 0700, *system_uid, *system_uid, FscryptAction::kNone, "ref"};
+        make_dir_with_options(options);
+    }
+    return {};
+}
+
+static Result<void> do_perform_apex_config(const BuiltinArguments& args) {
+    auto create_dirs = create_apex_data_dirs();
+    if (!create_dirs) {
+        return create_dirs.error();
+    }
+    auto parse_configs = parse_apex_configs();
+    if (!parse_configs) {
+        return parse_configs.error();
+    }
+    return {};
+}
+
 static Result<void> do_enter_default_mount_ns(const BuiltinArguments& args) {
     if (SwitchToDefaultMountNamespace()) {
         return {};
@@ -1163,6 +1262,17 @@
     }
 }
 
+static Result<void> do_finish_userspace_reboot(const BuiltinArguments&) {
+    LOG(INFO) << "Userspace reboot successfully finished";
+    boot_clock::time_point now = boot_clock::now();
+    SetProperty("sys.init.userspace_reboot.last_finished",
+                std::to_string(now.time_since_epoch().count()));
+    if (!android::sysprop::InitProperties::userspace_reboot_in_progress(false)) {
+        return Error() << "Failed to set sys.init.userspace_reboot.in_progress property";
+    }
+    return {};
+}
+
 // Builtin-function-map start
 const BuiltinFunctionMap& GetBuiltinFunctionMap() {
     constexpr std::size_t kMax = std::numeric_limits<std::size_t>::max();
@@ -1184,6 +1294,7 @@
         {"exec_background",         {1,     kMax, {false,  do_exec_background}}},
         {"exec_start",              {1,     1,    {false,  do_exec_start}}},
         {"export",                  {2,     2,    {false,  do_export}}},
+        {"finish_userspace_reboot", {0,     0,    {false,  do_finish_userspace_reboot}}},
         {"hostname",                {1,     1,    {true,   do_hostname}}},
         {"ifup",                    {1,     1,    {true,   do_ifup}}},
         {"init_user0",              {0,     0,    {false,  do_init_user0}}},
@@ -1196,17 +1307,18 @@
         {"load_system_props",       {0,     0,    {false,  do_load_system_props}}},
         {"loglevel",                {1,     1,    {false,  do_loglevel}}},
         {"mark_post_data",          {0,     0,    {false,  do_mark_post_data}}},
-        {"mkdir",                   {1,     4,    {true,   do_mkdir}}},
+        {"mkdir",                   {1,     6,    {true,   do_mkdir}}},
         // TODO: Do mount operations in vendor_init.
         // mount_all is currently too complex to run in vendor_init as it queues action triggers,
         // imports rc scripts, etc.  It should be simplified and run in vendor_init context.
         // mount and umount are run in the same context as mount_all for symmetry.
         {"mount_all",               {1,     kMax, {false,  do_mount_all}}},
         {"mount",                   {3,     kMax, {false,  do_mount}}},
-        {"parse_apex_configs",      {0,     0,    {false,  do_parse_apex_configs}}},
+        {"perform_apex_config",     {0,     0,    {false,  do_perform_apex_config}}},
         {"umount",                  {1,     1,    {false,  do_umount}}},
         {"umount_all",              {1,     1,    {false,  do_umount_all}}},
         {"readahead",               {1,     2,    {true,   do_readahead}}},
+        {"remount_userdata",        {0,     0,    {false,  do_remount_userdata}}},
         {"restart",                 {1,     1,    {false,  do_restart}}},
         {"restorecon",              {1,     kMax, {true,   do_restorecon}}},
         {"restorecon_recursive",    {1,     kMax, {true,   do_restorecon_recursive}}},
diff --git a/init/check_builtins.cpp b/init/check_builtins.cpp
index 771f1d7..bef6966 100644
--- a/init/check_builtins.cpp
+++ b/init/check_builtins.cpp
@@ -29,7 +29,9 @@
 #include <android-base/strings.h>
 
 #include "builtin_arguments.h"
+#include "host_init_verifier.h"
 #include "interface_utils.h"
+#include "property_type.h"
 #include "rlimit_parser.h"
 #include "service.h"
 #include "util.h"
@@ -81,6 +83,15 @@
     return check_exec(std::move(args));
 }
 
+Result<void> check_exec_reboot_on_failure(const BuiltinArguments& args) {
+    BuiltinArguments remaining_args(args.context);
+
+    remaining_args.args = std::vector<std::string>(args.begin() + 1, args.end());
+    remaining_args.args[0] = args[0];
+
+    return check_exec(remaining_args);
+}
+
 Result<void> check_interface_restart(const BuiltinArguments& args) {
     if (auto result = IsKnownInterface(args[1]); !result) {
         return result.error();
@@ -112,22 +123,10 @@
 }
 
 Result<void> check_mkdir(const BuiltinArguments& args) {
-    if (args.size() >= 4) {
-        if (!args[3].empty()) {
-            auto uid = DecodeUid(args[3]);
-            if (!uid) {
-                return Error() << "Unable to decode UID for '" << args[3] << "': " << uid.error();
-            }
-        }
-
-        if (args.size() == 5 && !args[4].empty()) {
-            auto gid = DecodeUid(args[4]);
-            if (!gid) {
-                return Error() << "Unable to decode GID for '" << args[4] << "': " << gid.error();
-            }
-        }
+    auto options = ParseMkdir(args.args);
+    if (!options) {
+        return options.error();
     }
-
     return {};
 }
 
@@ -174,6 +173,15 @@
                        << "' from init; use the restorecon builtin directly";
     }
 
+    const char* target_context = nullptr;
+    const char* type = nullptr;
+    property_info_area->GetPropertyInfo(name.c_str(), &target_context, &type);
+
+    if (!CheckType(type, value)) {
+        return Error() << "Property type check failed, value doesn't match expected type '"
+                       << (type ?: "(null)") << "'";
+    }
+
     return {};
 }
 
diff --git a/init/check_builtins.h b/init/check_builtins.h
index 4ff0d0c..fb34556 100644
--- a/init/check_builtins.h
+++ b/init/check_builtins.h
@@ -25,6 +25,7 @@
 Result<void> check_chown(const BuiltinArguments& args);
 Result<void> check_exec(const BuiltinArguments& args);
 Result<void> check_exec_background(const BuiltinArguments& args);
+Result<void> check_exec_reboot_on_failure(const BuiltinArguments& args);
 Result<void> check_interface_restart(const BuiltinArguments& args);
 Result<void> check_interface_start(const BuiltinArguments& args);
 Result<void> check_interface_stop(const BuiltinArguments& args);
diff --git a/init/devices.cpp b/init/devices.cpp
index f6e453a..9fbec64 100644
--- a/init/devices.cpp
+++ b/init/devices.cpp
@@ -441,6 +441,23 @@
     }
 }
 
+void DeviceHandler::HandleAshmemUevent(const Uevent& uevent) {
+    if (uevent.device_name == "ashmem") {
+        static const std::string boot_id_path = "/proc/sys/kernel/random/boot_id";
+        std::string boot_id;
+        if (!ReadFileToString(boot_id_path, &boot_id)) {
+            PLOG(ERROR) << "Cannot duplicate ashmem device node. Failed to read " << boot_id_path;
+            return;
+        };
+        boot_id = Trim(boot_id);
+
+        Uevent dup_ashmem_uevent = uevent;
+        dup_ashmem_uevent.device_name += boot_id;
+        dup_ashmem_uevent.path += boot_id;
+        HandleUevent(dup_ashmem_uevent);
+    }
+}
+
 void DeviceHandler::HandleUevent(const Uevent& uevent) {
     if (uevent.action == "add" || uevent.action == "change" || uevent.action == "online") {
         FixupSysPermissions(uevent.path, uevent.subsystem);
@@ -485,6 +502,10 @@
     mkdir_recursive(Dirname(devpath), 0755);
 
     HandleDevice(uevent.action, devpath, block, uevent.major, uevent.minor, links);
+
+    // Duplicate /dev/ashmem device and name it /dev/ashmem<boot_id>.
+    // TODO(b/111903542): remove once all users of /dev/ashmem are migrated to libcutils API.
+    HandleAshmemUevent(uevent);
 }
 
 void DeviceHandler::ColdbootDone() {
diff --git a/init/devices.h b/init/devices.h
index 442c53f..05d64da 100644
--- a/init/devices.h
+++ b/init/devices.h
@@ -130,6 +130,7 @@
     void HandleDevice(const std::string& action, const std::string& devpath, bool block, int major,
                       int minor, const std::vector<std::string>& links) const;
     void FixupSysPermissions(const std::string& upath, const std::string& subsystem) const;
+    void HandleAshmemUevent(const Uevent& uevent);
 
     std::vector<Permissions> dev_permissions_;
     std::vector<SysfsPermissions> sysfs_permissions_;
diff --git a/init/epoll.cpp b/init/epoll.cpp
index 01d8867..17d63fa 100644
--- a/init/epoll.cpp
+++ b/init/epoll.cpp
@@ -69,19 +69,24 @@
     return {};
 }
 
-Result<void> Epoll::Wait(std::optional<std::chrono::milliseconds> timeout) {
+Result<std::vector<std::function<void()>*>> Epoll::Wait(
+        std::optional<std::chrono::milliseconds> timeout) {
     int timeout_ms = -1;
     if (timeout && timeout->count() < INT_MAX) {
         timeout_ms = timeout->count();
     }
-    epoll_event ev;
-    auto nr = TEMP_FAILURE_RETRY(epoll_wait(epoll_fd_, &ev, 1, timeout_ms));
-    if (nr == -1) {
+    const auto max_events = epoll_handlers_.size();
+    epoll_event ev[max_events];
+    auto num_events = TEMP_FAILURE_RETRY(epoll_wait(epoll_fd_, ev, max_events, timeout_ms));
+    if (num_events == -1) {
         return ErrnoError() << "epoll_wait failed";
-    } else if (nr == 1) {
-        std::invoke(*reinterpret_cast<std::function<void()>*>(ev.data.ptr));
     }
-    return {};
+    std::vector<std::function<void()>*> pending_functions;
+    for (int i = 0; i < num_events; ++i) {
+        pending_functions.emplace_back(reinterpret_cast<std::function<void()>*>(ev[i].data.ptr));
+    }
+
+    return pending_functions;
 }
 
 }  // namespace init
diff --git a/init/epoll.h b/init/epoll.h
index ca84266..c32a661 100644
--- a/init/epoll.h
+++ b/init/epoll.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _INIT_EPOLL_H
-#define _INIT_EPOLL_H
+#pragma once
 
 #include <stdint.h>
 #include <sys/epoll.h>
@@ -24,6 +23,7 @@
 #include <functional>
 #include <map>
 #include <optional>
+#include <vector>
 
 #include <android-base/unique_fd.h>
 
@@ -39,7 +39,8 @@
     Result<void> Open();
     Result<void> RegisterHandler(int fd, std::function<void()> handler, uint32_t events = EPOLLIN);
     Result<void> UnregisterHandler(int fd);
-    Result<void> Wait(std::optional<std::chrono::milliseconds> timeout);
+    Result<std::vector<std::function<void()>*>> Wait(
+            std::optional<std::chrono::milliseconds> timeout);
 
   private:
     android::base::unique_fd epoll_fd_;
@@ -48,5 +49,3 @@
 
 }  // namespace init
 }  // namespace android
-
-#endif
diff --git a/init/firmware_handler.cpp b/init/firmware_handler.cpp
index c067f6f..1dce2d5 100644
--- a/init/firmware_handler.cpp
+++ b/init/firmware_handler.cpp
@@ -17,6 +17,10 @@
 #include "firmware_handler.h"
 
 #include <fcntl.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
 #include <sys/sendfile.h>
 #include <sys/wait.h>
 #include <unistd.h>
@@ -26,25 +30,29 @@
 #include <android-base/chrono_utils.h>
 #include <android-base/file.h>
 #include <android-base/logging.h>
+#include <android-base/strings.h>
 #include <android-base/unique_fd.h>
 
+using android::base::ReadFdToString;
+using android::base::Socketpair;
+using android::base::Split;
 using android::base::Timer;
+using android::base::Trim;
 using android::base::unique_fd;
 using android::base::WriteFully;
 
 namespace android {
 namespace init {
 
-static void LoadFirmware(const Uevent& uevent, const std::string& root, int fw_fd, size_t fw_size,
-                         int loading_fd, int data_fd) {
+static void LoadFirmware(const std::string& firmware, const std::string& root, int fw_fd,
+                         size_t fw_size, int loading_fd, int data_fd) {
     // Start transfer.
     WriteFully(loading_fd, "1", 1);
 
     // Copy the firmware.
     int rc = sendfile(data_fd, fw_fd, nullptr, fw_size);
     if (rc == -1) {
-        PLOG(ERROR) << "firmware: sendfile failed { '" << root << "', '" << uevent.firmware
-                    << "' }";
+        PLOG(ERROR) << "firmware: sendfile failed { '" << root << "', '" << firmware << "' }";
     }
 
     // Tell the firmware whether to abort or commit.
@@ -56,36 +64,151 @@
     return access("/dev/.booting", F_OK) == 0;
 }
 
-FirmwareHandler::FirmwareHandler(std::vector<std::string> firmware_directories)
-    : firmware_directories_(std::move(firmware_directories)) {}
+FirmwareHandler::FirmwareHandler(std::vector<std::string> firmware_directories,
+                                 std::vector<ExternalFirmwareHandler> external_firmware_handlers)
+    : firmware_directories_(std::move(firmware_directories)),
+      external_firmware_handlers_(std::move(external_firmware_handlers)) {}
 
-void FirmwareHandler::ProcessFirmwareEvent(const Uevent& uevent) {
-    int booting = IsBooting();
+Result<std::string> FirmwareHandler::RunExternalHandler(const std::string& handler, uid_t uid,
+                                                        const Uevent& uevent) const {
+    unique_fd child_stdout;
+    unique_fd parent_stdout;
+    if (!Socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, &child_stdout, &parent_stdout)) {
+        return ErrnoError() << "Socketpair() for stdout failed";
+    }
 
+    unique_fd child_stderr;
+    unique_fd parent_stderr;
+    if (!Socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, &child_stderr, &parent_stderr)) {
+        return ErrnoError() << "Socketpair() for stderr failed";
+    }
+
+    signal(SIGCHLD, SIG_DFL);
+
+    auto pid = fork();
+    if (pid < 0) {
+        return ErrnoError() << "fork() failed";
+    }
+
+    if (pid == 0) {
+        setenv("FIRMWARE", uevent.firmware.c_str(), 1);
+        setenv("DEVPATH", uevent.path.c_str(), 1);
+        parent_stdout.reset();
+        parent_stderr.reset();
+        close(STDOUT_FILENO);
+        close(STDERR_FILENO);
+        dup2(child_stdout.get(), STDOUT_FILENO);
+        dup2(child_stderr.get(), STDERR_FILENO);
+
+        auto args = Split(handler, " ");
+        std::vector<char*> c_args;
+        for (auto& arg : args) {
+            c_args.emplace_back(arg.data());
+        }
+        c_args.emplace_back(nullptr);
+
+        if (setuid(uid) != 0) {
+            fprintf(stderr, "setuid() failed: %s", strerror(errno));
+            _exit(EXIT_FAILURE);
+        }
+
+        execv(c_args[0], c_args.data());
+        fprintf(stderr, "exec() failed: %s", strerror(errno));
+        _exit(EXIT_FAILURE);
+    }
+
+    child_stdout.reset();
+    child_stderr.reset();
+
+    int status;
+    pid_t waited_pid = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0));
+    if (waited_pid == -1) {
+        return ErrnoError() << "waitpid() failed";
+    }
+
+    std::string stdout_content;
+    if (!ReadFdToString(parent_stdout.get(), &stdout_content)) {
+        return ErrnoError() << "ReadFdToString() for stdout failed";
+    }
+
+    std::string stderr_content;
+    if (ReadFdToString(parent_stderr.get(), &stderr_content)) {
+        auto messages = Split(stderr_content, "\n");
+        for (const auto& message : messages) {
+            if (!message.empty()) {
+                LOG(ERROR) << "External Firmware Handler: " << message;
+            }
+        }
+    } else {
+        LOG(ERROR) << "ReadFdToString() for stderr failed";
+    }
+
+    if (WIFEXITED(status)) {
+        if (WEXITSTATUS(status) == EXIT_SUCCESS) {
+            return Trim(stdout_content);
+        } else {
+            return Error() << "exited with status " << WEXITSTATUS(status);
+        }
+    } else if (WIFSIGNALED(status)) {
+        return Error() << "killed by signal " << WTERMSIG(status);
+    }
+
+    return Error() << "unexpected exit status " << status;
+}
+
+std::string FirmwareHandler::GetFirmwarePath(const Uevent& uevent) const {
+    for (const auto& external_handler : external_firmware_handlers_) {
+        if (external_handler.devpath == uevent.path) {
+            LOG(INFO) << "Launching external firmware handler '" << external_handler.handler_path
+                      << "' for devpath: '" << uevent.path << "' firmware: '" << uevent.firmware
+                      << "'";
+
+            auto result =
+                    RunExternalHandler(external_handler.handler_path, external_handler.uid, uevent);
+            if (!result) {
+                LOG(ERROR) << "Using default firmware; External firmware handler failed: "
+                           << result.error();
+                return uevent.firmware;
+            }
+            if (result->find("..") != std::string::npos) {
+                LOG(ERROR) << "Using default firmware; External firmware handler provided an "
+                              "invalid path, '"
+                           << *result << "'";
+                return uevent.firmware;
+            }
+            LOG(INFO) << "Loading firmware '" << *result << "' in place of '" << uevent.firmware
+                      << "'";
+            return *result;
+        }
+    }
     LOG(INFO) << "firmware: loading '" << uevent.firmware << "' for '" << uevent.path << "'";
+    return uevent.firmware;
+}
 
-    std::string root = "/sys" + uevent.path;
+void FirmwareHandler::ProcessFirmwareEvent(const std::string& root,
+                                           const std::string& firmware) const {
     std::string loading = root + "/loading";
     std::string data = root + "/data";
 
     unique_fd loading_fd(open(loading.c_str(), O_WRONLY | O_CLOEXEC));
     if (loading_fd == -1) {
-        PLOG(ERROR) << "couldn't open firmware loading fd for " << uevent.firmware;
+        PLOG(ERROR) << "couldn't open firmware loading fd for " << firmware;
         return;
     }
 
     unique_fd data_fd(open(data.c_str(), O_WRONLY | O_CLOEXEC));
     if (data_fd == -1) {
-        PLOG(ERROR) << "couldn't open firmware data fd for " << uevent.firmware;
+        PLOG(ERROR) << "couldn't open firmware data fd for " << firmware;
         return;
     }
 
     std::vector<std::string> attempted_paths_and_errors;
 
+    int booting = IsBooting();
 try_loading_again:
     attempted_paths_and_errors.clear();
     for (const auto& firmware_directory : firmware_directories_) {
-        std::string file = firmware_directory + uevent.firmware;
+        std::string file = firmware_directory + firmware;
         unique_fd fw_fd(open(file.c_str(), O_RDONLY | O_CLOEXEC));
         if (fw_fd == -1) {
             attempted_paths_and_errors.emplace_back("firmware: attempted " + file +
@@ -98,7 +221,7 @@
                                                     ", fstat failed: " + strerror(errno));
             continue;
         }
-        LoadFirmware(uevent, root, fw_fd, sb.st_size, loading_fd, data_fd);
+        LoadFirmware(firmware, root, fw_fd, sb.st_size, loading_fd, data_fd);
         return;
     }
 
@@ -110,7 +233,7 @@
         goto try_loading_again;
     }
 
-    LOG(ERROR) << "firmware: could not find firmware for " << uevent.firmware;
+    LOG(ERROR) << "firmware: could not find firmware for " << firmware;
     for (const auto& message : attempted_paths_and_errors) {
         LOG(ERROR) << message;
     }
@@ -129,7 +252,8 @@
     }
     if (pid == 0) {
         Timer t;
-        ProcessFirmwareEvent(uevent);
+        auto firmware = GetFirmwarePath(uevent);
+        ProcessFirmwareEvent("/sys" + uevent.path, firmware);
         LOG(INFO) << "loading " << uevent.path << " took " << t;
         _exit(EXIT_SUCCESS);
     }
diff --git a/init/firmware_handler.h b/init/firmware_handler.h
index 3996096..b4138f1 100644
--- a/init/firmware_handler.h
+++ b/init/firmware_handler.h
@@ -14,32 +14,48 @@
  * limitations under the License.
  */
 
-#ifndef _INIT_FIRMWARE_HANDLER_H
-#define _INIT_FIRMWARE_HANDLER_H
+#pragma once
+
+#include <pwd.h>
 
 #include <string>
 #include <vector>
 
+#include "result.h"
 #include "uevent.h"
 #include "uevent_handler.h"
 
 namespace android {
 namespace init {
 
+struct ExternalFirmwareHandler {
+    ExternalFirmwareHandler(std::string devpath, uid_t uid, std::string handler_path)
+        : devpath(std::move(devpath)), uid(uid), handler_path(std::move(handler_path)) {}
+    std::string devpath;
+    uid_t uid;
+    std::string handler_path;
+};
+
 class FirmwareHandler : public UeventHandler {
   public:
-    explicit FirmwareHandler(std::vector<std::string> firmware_directories);
+    FirmwareHandler(std::vector<std::string> firmware_directories,
+                    std::vector<ExternalFirmwareHandler> external_firmware_handlers);
     virtual ~FirmwareHandler() = default;
 
     void HandleUevent(const Uevent& uevent) override;
 
   private:
-    void ProcessFirmwareEvent(const Uevent& uevent);
+    friend void FirmwareTestWithExternalHandler(const std::string& test_name,
+                                                bool expect_new_firmware);
+
+    Result<std::string> RunExternalHandler(const std::string& handler, uid_t uid,
+                                           const Uevent& uevent) const;
+    std::string GetFirmwarePath(const Uevent& uevent) const;
+    void ProcessFirmwareEvent(const std::string& root, const std::string& firmware) const;
 
     std::vector<std::string> firmware_directories_;
+    std::vector<ExternalFirmwareHandler> external_firmware_handlers_;
 };
 
 }  // namespace init
 }  // namespace android
-
-#endif
diff --git a/init/firmware_handler_test.cpp b/init/firmware_handler_test.cpp
new file mode 100644
index 0000000..7bb603c
--- /dev/null
+++ b/init/firmware_handler_test.cpp
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "firmware_handler.h"
+
+#include <stdlib.h>
+#include <iostream>
+
+#include <android-base/file.h>
+#include <gtest/gtest.h>
+
+#include "uevent.h"
+
+using android::base::GetExecutablePath;
+using namespace std::literals;
+
+namespace android {
+namespace init {
+
+void FirmwareTestWithExternalHandler(const std::string& test_name, bool expect_new_firmware) {
+    auto test_path = GetExecutablePath() + " firmware " + test_name;
+    auto external_firmware_handler = ExternalFirmwareHandler(
+            "/devices/led/firmware/test_firmware001.bin", getuid(), test_path);
+
+    auto firmware_handler = FirmwareHandler({"/test"}, {external_firmware_handler});
+
+    auto uevent = Uevent{
+            .path = "/devices/led/firmware/test_firmware001.bin",
+            .firmware = "test_firmware001.bin",
+    };
+
+    if (expect_new_firmware) {
+        EXPECT_EQ("other_firmware001.bin", firmware_handler.GetFirmwarePath(uevent));
+    } else {
+        EXPECT_EQ("test_firmware001.bin", firmware_handler.GetFirmwarePath(uevent));
+    }
+
+    // Always test the base case that the handler isn't invoked if the devpath doesn't match.
+    auto uevent_different_path = Uevent{
+            .path = "/devices/led/not/mine",
+            .firmware = "test_firmware001.bin",
+    };
+    EXPECT_EQ("test_firmware001.bin", firmware_handler.GetFirmwarePath(uevent_different_path));
+}
+
+TEST(firmware_handler, HandleChange) {
+    FirmwareTestWithExternalHandler("HandleChange", true);
+}
+
+int HandleChange(int argc, char** argv) {
+    // Assert that the environment is set up correctly.
+    if (getenv("DEVPATH") != "/devices/led/firmware/test_firmware001.bin"s) {
+        std::cerr << "$DEVPATH not set correctly" << std::endl;
+        return EXIT_FAILURE;
+    }
+    if (getenv("FIRMWARE") != "test_firmware001.bin"s) {
+        std::cerr << "$FIRMWARE not set correctly" << std::endl;
+        return EXIT_FAILURE;
+    }
+    std::cout << "other_firmware001.bin" << std::endl;
+    return 0;
+}
+
+TEST(firmware_handler, HandleAbort) {
+    FirmwareTestWithExternalHandler("HandleAbort", false);
+}
+
+int HandleAbort(int argc, char** argv) {
+    abort();
+    return 0;
+}
+
+TEST(firmware_handler, HandleFailure) {
+    FirmwareTestWithExternalHandler("HandleFailure", false);
+}
+
+int HandleFailure(int argc, char** argv) {
+    std::cerr << "Failed" << std::endl;
+    return EXIT_FAILURE;
+}
+
+TEST(firmware_handler, HandleBadPath) {
+    FirmwareTestWithExternalHandler("HandleBadPath", false);
+}
+
+int HandleBadPath(int argc, char** argv) {
+    std::cout << "../firmware.bin";
+    return 0;
+}
+
+}  // namespace init
+}  // namespace android
+
+// init_test.cpp contains the main entry point for all init tests.
+int FirmwareTestChildMain(int argc, char** argv) {
+    if (argc < 3) {
+        return 1;
+    }
+
+#define RunTest(testname)                           \
+    if (argv[2] == std::string(#testname)) {        \
+        return android::init::testname(argc, argv); \
+    }
+
+    RunTest(HandleChange);
+    RunTest(HandleAbort);
+    RunTest(HandleFailure);
+    RunTest(HandleBadPath);
+
+#undef RunTest
+    return 1;
+}
diff --git a/init/first_stage_init.cpp b/init/first_stage_init.cpp
index b60c450..bd71cb5 100644
--- a/init/first_stage_init.cpp
+++ b/init/first_stage_init.cpp
@@ -121,9 +121,9 @@
         _exit(127);
     }
     ioctl(fd, TIOCSCTTY, 0);
-    dup2(fd, 0);
-    dup2(fd, 1);
-    dup2(fd, 2);
+    dup2(fd, STDIN_FILENO);
+    dup2(fd, STDOUT_FILENO);
+    dup2(fd, STDERR_FILENO);
     close(fd);
 
     const char* path = "/system/bin/sh";
@@ -204,10 +204,6 @@
     // part of the product partition, e.g. because they are mounted read-write.
     CHECKCALL(mkdir("/mnt/product", 0755));
 
-    // /apex is used to mount APEXes
-    CHECKCALL(mount("tmpfs", "/apex", "tmpfs", MS_NOEXEC | MS_NOSUID | MS_NODEV,
-                    "mode=0755,uid=0,gid=0"));
-
     // /debug_ramdisk is used to preserve additional files from the debug ramdisk
     CHECKCALL(mount("tmpfs", "/debug_ramdisk", "tmpfs", MS_NOEXEC | MS_NOSUID | MS_NODEV,
                     "mode=0755,uid=0,gid=0"));
@@ -239,11 +235,16 @@
     }
 
     Modprobe m({"/lib/modules"});
-    if (!m.LoadListedModules()) {
-        LOG(FATAL) << "Failed to load kernel modules";
+    auto want_console = ALLOW_FIRST_STAGE_CONSOLE && FirstStageConsole(cmdline);
+    if (!m.LoadListedModules(!want_console)) {
+        if (want_console) {
+            LOG(ERROR) << "Failed to load kernel modules, starting console";
+        } else {
+            LOG(FATAL) << "Failed to load kernel modules";
+        }
     }
 
-    if (ALLOW_FIRST_STAGE_CONSOLE && FirstStageConsole(cmdline)) {
+    if (want_console) {
         StartConsole();
     }
 
@@ -291,6 +292,10 @@
 
     const char* path = "/system/bin/init";
     const char* args[] = {path, "selinux_setup", nullptr};
+    auto fd = open("/dev/kmsg", O_WRONLY | O_CLOEXEC);
+    dup2(fd, STDOUT_FILENO);
+    dup2(fd, STDERR_FILENO);
+    close(fd);
     execv(path, const_cast<char**>(args));
 
     // execv() only returns if an error happened, in which case we
diff --git a/init/first_stage_mount.cpp b/init/first_stage_mount.cpp
index 1a5ed28..9121bac 100644
--- a/init/first_stage_mount.cpp
+++ b/init/first_stage_mount.cpp
@@ -36,6 +36,7 @@
 #include <fs_mgr_overlayfs.h>
 #include <libgsi/libgsi.h>
 #include <liblp/liblp.h>
+#include <libsnapshot/snapshot.h>
 
 #include "devices.h"
 #include "switch_root.h"
@@ -49,12 +50,14 @@
 using android::fs_mgr::AvbHandleStatus;
 using android::fs_mgr::AvbHashtreeResult;
 using android::fs_mgr::AvbUniquePtr;
-using android::fs_mgr::BuildGsiSystemFstabEntry;
 using android::fs_mgr::Fstab;
 using android::fs_mgr::FstabEntry;
 using android::fs_mgr::ReadDefaultFstab;
 using android::fs_mgr::ReadFstabFromDt;
 using android::fs_mgr::SkipMountingPartitions;
+using android::fs_mgr::TransformFstabForDsu;
+using android::init::WriteFile;
+using android::snapshot::SnapshotManager;
 
 using namespace std::literals;
 
@@ -75,8 +78,9 @@
     bool InitDevices();
 
   protected:
-    ListenerAction HandleBlockDevice(const std::string& name, const Uevent&);
-    bool InitRequiredDevices();
+    ListenerAction HandleBlockDevice(const std::string& name, const Uevent&,
+                                     std::set<std::string>* required_devices);
+    bool InitRequiredDevices(std::set<std::string> devices);
     bool InitMappedDevice(const std::string& verity_device);
     bool InitDeviceMapper();
     bool CreateLogicalPartitions();
@@ -87,14 +91,14 @@
     bool TrySwitchSystemAsRoot();
     bool TrySkipMountingPartitions();
     bool IsDmLinearEnabled();
-    bool GetDmLinearMetadataDevice();
+    void GetDmLinearMetadataDevice(std::set<std::string>* devices);
     bool InitDmLinearBackingDevices(const android::fs_mgr::LpMetadata& metadata);
     void UseGsiIfPresent();
 
-    ListenerAction UeventCallback(const Uevent& uevent);
+    ListenerAction UeventCallback(const Uevent& uevent, std::set<std::string>* required_devices);
 
     // Pure virtual functions.
-    virtual bool GetDmVerityDevices() = 0;
+    virtual bool GetDmVerityDevices(std::set<std::string>* devices) = 0;
     virtual bool SetUpDmVerity(FstabEntry* fstab_entry) = 0;
 
     bool need_dm_verity_;
@@ -102,7 +106,6 @@
 
     Fstab fstab_;
     std::string lp_metadata_partition_;
-    std::set<std::string> required_devices_partition_names_;
     std::string super_partition_name_;
     std::unique_ptr<DeviceHandler> device_handler_;
     UeventListener uevent_listener_;
@@ -114,7 +117,7 @@
     ~FirstStageMountVBootV1() override = default;
 
   protected:
-    bool GetDmVerityDevices() override;
+    bool GetDmVerityDevices(std::set<std::string>* devices) override;
     bool SetUpDmVerity(FstabEntry* fstab_entry) override;
 };
 
@@ -126,7 +129,7 @@
     ~FirstStageMountVBootV2() override = default;
 
   protected:
-    bool GetDmVerityDevices() override;
+    bool GetDmVerityDevices(std::set<std::string>* devices) override;
     bool SetUpDmVerity(FstabEntry* fstab_entry) override;
     bool InitAvbHandle();
 
@@ -244,15 +247,19 @@
 
     if (!InitDevices()) return false;
 
-    if (!CreateLogicalPartitions()) return false;
-
     if (!MountPartitions()) return false;
 
     return true;
 }
 
 bool FirstStageMount::InitDevices() {
-    return GetDmLinearMetadataDevice() && GetDmVerityDevices() && InitRequiredDevices();
+    std::set<std::string> devices;
+    GetDmLinearMetadataDevice(&devices);
+
+    if (!GetDmVerityDevices(&devices)) {
+        return false;
+    }
+    return InitRequiredDevices(std::move(devices));
 }
 
 bool FirstStageMount::IsDmLinearEnabled() {
@@ -262,45 +269,46 @@
     return false;
 }
 
-bool FirstStageMount::GetDmLinearMetadataDevice() {
+void FirstStageMount::GetDmLinearMetadataDevice(std::set<std::string>* devices) {
     // Add any additional devices required for dm-linear mappings.
     if (!IsDmLinearEnabled()) {
-        return true;
+        return;
     }
 
-    required_devices_partition_names_.emplace(super_partition_name_);
-    return true;
+    devices->emplace(super_partition_name_);
 }
 
-// Creates devices with uevent->partition_name matching one in the member variable
-// required_devices_partition_names_. Found partitions will then be removed from it
-// for the subsequent member function to check which devices are NOT created.
-bool FirstStageMount::InitRequiredDevices() {
+// Creates devices with uevent->partition_name matching ones in the given set.
+// Found partitions will then be removed from it for the subsequent member
+// function to check which devices are NOT created.
+bool FirstStageMount::InitRequiredDevices(std::set<std::string> devices) {
     if (!InitDeviceMapper()) {
         return false;
     }
 
-    if (required_devices_partition_names_.empty()) {
+    if (devices.empty()) {
         return true;
     }
 
-    auto uevent_callback = [this](const Uevent& uevent) { return UeventCallback(uevent); };
+    auto uevent_callback = [&, this](const Uevent& uevent) {
+        return UeventCallback(uevent, &devices);
+    };
     uevent_listener_.RegenerateUevents(uevent_callback);
 
-    // UeventCallback() will remove found partitions from required_devices_partition_names_.
-    // So if it isn't empty here, it means some partitions are not found.
-    if (!required_devices_partition_names_.empty()) {
+    // UeventCallback() will remove found partitions from |devices|. So if it
+    // isn't empty here, it means some partitions are not found.
+    if (!devices.empty()) {
         LOG(INFO) << __PRETTY_FUNCTION__
                   << ": partition(s) not found in /sys, waiting for their uevent(s): "
-                  << android::base::Join(required_devices_partition_names_, ", ");
+                  << android::base::Join(devices, ", ");
         Timer t;
         uevent_listener_.Poll(uevent_callback, 10s);
         LOG(INFO) << "Wait for partitions returned after " << t;
     }
 
-    if (!required_devices_partition_names_.empty()) {
+    if (!devices.empty()) {
         LOG(ERROR) << __PRETTY_FUNCTION__ << ": partition(s) not found after polling timeout: "
-                   << android::base::Join(required_devices_partition_names_, ", ");
+                   << android::base::Join(devices, ", ");
         return false;
     }
 
@@ -333,27 +341,20 @@
 }
 
 bool FirstStageMount::InitDmLinearBackingDevices(const android::fs_mgr::LpMetadata& metadata) {
+    std::set<std::string> devices;
+
     auto partition_names = android::fs_mgr::GetBlockDevicePartitionNames(metadata);
     for (const auto& partition_name : partition_names) {
         // The super partition was found in the earlier pass.
         if (partition_name == super_partition_name_) {
             continue;
         }
-        required_devices_partition_names_.emplace(partition_name);
+        devices.emplace(partition_name);
     }
-    if (required_devices_partition_names_.empty()) {
+    if (devices.empty()) {
         return true;
     }
-
-    auto uevent_callback = [this](const Uevent& uevent) { return UeventCallback(uevent); };
-    uevent_listener_.RegenerateUevents(uevent_callback);
-
-    if (!required_devices_partition_names_.empty()) {
-        LOG(ERROR) << __PRETTY_FUNCTION__ << ": partition(s) not found after polling timeout: "
-                   << android::base::Join(required_devices_partition_names_, ", ");
-        return false;
-    }
-    return true;
+    return InitRequiredDevices(std::move(devices));
 }
 
 bool FirstStageMount::CreateLogicalPartitions() {
@@ -366,6 +367,21 @@
         return false;
     }
 
+    if (SnapshotManager::IsSnapshotManagerNeeded()) {
+        auto sm = SnapshotManager::NewForFirstStageMount();
+        if (!sm) {
+            return false;
+        }
+        if (sm->NeedSnapshotsInFirstStageMount()) {
+            // When COW images are present for snapshots, they are stored on
+            // the data partition.
+            if (!InitRequiredDevices({"userdata"})) {
+                return false;
+            }
+            return sm->CreateLogicalAndSnapshotPartitions(lp_metadata_partition_);
+        }
+    }
+
     auto metadata = android::fs_mgr::ReadCurrentMetadata(lp_metadata_partition_);
     if (!metadata) {
         LOG(ERROR) << "Could not read logical partition metadata from " << lp_metadata_partition_;
@@ -377,20 +393,21 @@
     return android::fs_mgr::CreateLogicalPartitions(*metadata.get(), lp_metadata_partition_);
 }
 
-ListenerAction FirstStageMount::HandleBlockDevice(const std::string& name, const Uevent& uevent) {
+ListenerAction FirstStageMount::HandleBlockDevice(const std::string& name, const Uevent& uevent,
+                                                  std::set<std::string>* required_devices) {
     // Matches partition name to create device nodes.
     // Both required_devices_partition_names_ and uevent->partition_name have A/B
     // suffix when A/B is used.
-    auto iter = required_devices_partition_names_.find(name);
-    if (iter != required_devices_partition_names_.end()) {
+    auto iter = required_devices->find(name);
+    if (iter != required_devices->end()) {
         LOG(VERBOSE) << __PRETTY_FUNCTION__ << ": found partition: " << *iter;
         if (IsDmLinearEnabled() && name == super_partition_name_) {
             std::vector<std::string> links = device_handler_->GetBlockDeviceSymlinks(uevent);
             lp_metadata_partition_ = links[0];
         }
-        required_devices_partition_names_.erase(iter);
+        required_devices->erase(iter);
         device_handler_->HandleUevent(uevent);
-        if (required_devices_partition_names_.empty()) {
+        if (required_devices->empty()) {
             return ListenerAction::kStop;
         } else {
             return ListenerAction::kContinue;
@@ -399,18 +416,19 @@
     return ListenerAction::kContinue;
 }
 
-ListenerAction FirstStageMount::UeventCallback(const Uevent& uevent) {
+ListenerAction FirstStageMount::UeventCallback(const Uevent& uevent,
+                                               std::set<std::string>* required_devices) {
     // Ignores everything that is not a block device.
     if (uevent.subsystem != "block") {
         return ListenerAction::kContinue;
     }
 
     if (!uevent.partition_name.empty()) {
-        return HandleBlockDevice(uevent.partition_name, uevent);
+        return HandleBlockDevice(uevent.partition_name, uevent, required_devices);
     } else {
         size_t base_idx = uevent.path.rfind('/');
         if (base_idx != std::string::npos) {
-            return HandleBlockDevice(uevent.path.substr(base_idx + 1), uevent);
+            return HandleBlockDevice(uevent.path.substr(base_idx + 1), uevent, required_devices);
         }
     }
     // Not found a partition or find an unneeded partition, continue to find others.
@@ -493,14 +511,7 @@
 // this case, we mount system first then pivot to it.  From that point on,
 // we are effectively identical to a system-as-root device.
 bool FirstStageMount::TrySwitchSystemAsRoot() {
-    auto metadata_partition = std::find_if(fstab_.begin(), fstab_.end(), [](const auto& entry) {
-        return entry.mount_point == "/metadata";
-    });
-    if (metadata_partition != fstab_.end()) {
-        if (MountPartition(metadata_partition, true /* erase_same_mounts */)) {
-            UseGsiIfPresent();
-        }
-    }
+    UseGsiIfPresent();
 
     auto system_partition = std::find_if(fstab_.begin(), fstab_.end(), [](const auto& entry) {
         return entry.mount_point == "/system";
@@ -523,6 +534,17 @@
 }
 
 bool FirstStageMount::MountPartitions() {
+    // Mount /metadata before creating logical partitions, since we need to
+    // know whether a snapshot merge is in progress.
+    auto metadata_partition = std::find_if(fstab_.begin(), fstab_.end(), [](const auto& entry) {
+        return entry.mount_point == "/metadata";
+    });
+    if (metadata_partition != fstab_.end()) {
+        MountPartition(metadata_partition, true /* erase_same_mounts */);
+    }
+
+    if (!CreateLogicalPartitions()) return false;
+
     if (!TrySwitchSystemAsRoot()) return false;
 
     if (!SkipMountingPartitions(&fstab_)) return false;
@@ -563,17 +585,7 @@
     const auto devices = fs_mgr_overlayfs_required_devices(&fstab_);
     for (auto const& device : devices) {
         if (android::base::StartsWith(device, "/dev/block/by-name/")) {
-            required_devices_partition_names_.emplace(basename(device.c_str()));
-            auto uevent_callback = [this](const Uevent& uevent) { return UeventCallback(uevent); };
-            uevent_listener_.RegenerateUevents(uevent_callback);
-            if (!required_devices_partition_names_.empty()) {
-                uevent_listener_.Poll(uevent_callback, 10s);
-                if (!required_devices_partition_names_.empty()) {
-                    LOG(ERROR) << __PRETTY_FUNCTION__
-                               << ": partition(s) not found after polling timeout: "
-                               << android::base::Join(required_devices_partition_names_, ", ");
-                }
-            }
+            InitRequiredDevices({basename(device.c_str())});
         } else {
             InitMappedDevice(device);
         }
@@ -585,14 +597,14 @@
 }
 
 void FirstStageMount::UseGsiIfPresent() {
-    std::string metadata_file, error;
+    std::string error;
 
-    if (!android::gsi::CanBootIntoGsi(&metadata_file, &error)) {
+    if (!android::gsi::CanBootIntoGsi(&error)) {
         LOG(INFO) << "GSI " << error << ", proceeding with normal boot";
         return;
     }
 
-    auto metadata = android::fs_mgr::ReadFromImageFile(metadata_file.c_str());
+    auto metadata = android::fs_mgr::ReadFromImageFile(gsi::kDsuLpMetadataFile);
     if (!metadata) {
         LOG(ERROR) << "GSI partition layout could not be read";
         return;
@@ -602,19 +614,11 @@
         return;
     }
 
-    // Find the name of the super partition for the GSI. It will either be
-    // "userdata", or a block device such as an sdcard. There are no by-name
-    // partitions other than userdata that we support installing GSIs to.
+    // Find the super name. PartitionOpener will ensure this translates to the
+    // correct block device path.
     auto super = GetMetadataSuperBlockDevice(*metadata.get());
-    std::string super_name = android::fs_mgr::GetBlockDevicePartitionName(*super);
-    std::string super_path;
-    if (super_name == "userdata") {
-        super_path = "/dev/block/by-name/" + super_name;
-    } else {
-        super_path = "/dev/block/" + super_name;
-    }
-
-    if (!android::fs_mgr::CreateLogicalPartitions(*metadata.get(), super_path)) {
+    auto super_name = android::fs_mgr::GetBlockDevicePartitionName(*super);
+    if (!android::fs_mgr::CreateLogicalPartitions(*metadata.get(), super_name)) {
         LOG(ERROR) << "GSI partition layout could not be instantiated";
         return;
     }
@@ -624,18 +628,20 @@
         return;
     }
 
-    // Replace the existing system fstab entry.
-    auto system_partition = std::find_if(fstab_.begin(), fstab_.end(), [](const auto& entry) {
-        return entry.mount_point == "/system";
-    });
-    if (system_partition != fstab_.end()) {
-        fstab_.erase(system_partition);
+    std::string lp_names = "";
+    std::vector<std::string> dsu_partitions;
+    for (auto&& partition : metadata->partitions) {
+        auto name = fs_mgr::GetPartitionName(partition);
+        dsu_partitions.push_back(name);
+        lp_names += name + ",";
     }
-    fstab_.emplace_back(BuildGsiSystemFstabEntry());
+    // Publish the logical partition names for TransformFstabForDsu
+    WriteFile(gsi::kGsiLpNamesFile, lp_names);
+    TransformFstabForDsu(&fstab_, dsu_partitions);
     gsi_not_on_userdata_ = (super_name != "userdata");
 }
 
-bool FirstStageMountVBootV1::GetDmVerityDevices() {
+bool FirstStageMountVBootV1::GetDmVerityDevices(std::set<std::string>* devices) {
     need_dm_verity_ = false;
 
     for (const auto& fstab_entry : fstab_) {
@@ -654,7 +660,7 @@
     // Notes that fstab_rec->blk_device has A/B suffix updated by fs_mgr when A/B is used.
     for (const auto& fstab_entry : fstab_) {
         if (!fstab_entry.fs_mgr_flags.logical) {
-            required_devices_partition_names_.emplace(basename(fstab_entry.blk_device.c_str()));
+            devices->emplace(basename(fstab_entry.blk_device.c_str()));
         }
     }
 
@@ -705,7 +711,7 @@
     }
 }
 
-bool FirstStageMountVBootV2::GetDmVerityDevices() {
+bool FirstStageMountVBootV2::GetDmVerityDevices(std::set<std::string>* devices) {
     need_dm_verity_ = false;
 
     std::set<std::string> logical_partitions;
@@ -719,7 +725,7 @@
             // Don't try to find logical partitions via uevent regeneration.
             logical_partitions.emplace(basename(fstab_entry.blk_device.c_str()));
         } else {
-            required_devices_partition_names_.emplace(basename(fstab_entry.blk_device.c_str()));
+            devices->emplace(basename(fstab_entry.blk_device.c_str()));
         }
     }
 
@@ -736,11 +742,11 @@
             if (logical_partitions.count(partition_name)) {
                 continue;
             }
-            // required_devices_partition_names_ is of type std::set so it's not an issue
-            // to emplace a partition twice. e.g., /vendor might be in both places:
+            // devices is of type std::set so it's not an issue to emplace a
+            // partition twice. e.g., /vendor might be in both places:
             //   - device_tree_vbmeta_parts_ = "vbmeta,boot,system,vendor"
             //   - mount_fstab_recs_: /vendor_a
-            required_devices_partition_names_.emplace(partition_name);
+            devices->emplace(partition_name);
         }
     }
     return true;
diff --git a/init/fscrypt_init_extensions.cpp b/init/fscrypt_init_extensions.cpp
new file mode 100644
index 0000000..fbd8189
--- /dev/null
+++ b/init/fscrypt_init_extensions.cpp
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "fscrypt_init_extensions.h"
+
+#include <dirent.h>
+#include <errno.h>
+#include <fts.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <string>
+#include <vector>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/parseint.h>
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+#include <cutils/properties.h>
+#include <cutils/sockets.h>
+#include <fscrypt/fscrypt.h>
+#include <keyutils.h>
+#include <logwrap/logwrap.h>
+
+#define TAG "fscrypt"
+
+using namespace android::fscrypt;
+
+bool FscryptInstallKeyring() {
+    if (keyctl_search(KEY_SPEC_SESSION_KEYRING, "keyring", "fscrypt", 0) != -1) {
+        LOG(INFO) << "Keyring is already created";
+        return true;
+    }
+    key_serial_t device_keyring = add_key("keyring", "fscrypt", 0, 0, KEY_SPEC_SESSION_KEYRING);
+
+    if (device_keyring == -1) {
+        PLOG(ERROR) << "Failed to create keyring";
+        return false;
+    }
+    LOG(INFO) << "Keyring created with id " << device_keyring << " in process " << getpid();
+    return true;
+}
+
+// TODO(b/139378601): use a single central implementation of this.
+static void delete_dir_contents(const std::string& dir) {
+    char* const paths[2] = {const_cast<char*>(dir.c_str()), nullptr};
+    FTS* fts = fts_open(paths, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr);
+    FTSENT* cur;
+    while ((cur = fts_read(fts)) != nullptr) {
+        if (cur->fts_info == FTS_ERR) {
+            PLOG(ERROR) << "fts_read";
+            break;
+        }
+        if (dir == cur->fts_path) {
+            continue;
+        }
+        switch (cur->fts_info) {
+            case FTS_D:
+                break;  // Ignore these
+            case FTS_DP:
+                if (rmdir(cur->fts_path) == -1) {
+                    PLOG(ERROR) << "rmdir " << cur->fts_path;
+                }
+                break;
+            default:
+                PLOG(ERROR) << "FTS unexpected type " << cur->fts_info << " at " << cur->fts_path;
+                if (rmdir(cur->fts_path) != -1) break;
+                // FALLTHRU (for gcc, lint, pcc, etc; and following for clang)
+                FALLTHROUGH_INTENDED;
+            case FTS_F:
+            case FTS_SL:
+            case FTS_SLNONE:
+                if (unlink(cur->fts_path) == -1) {
+                    PLOG(ERROR) << "unlink " << cur->fts_path;
+                }
+                break;
+        }
+    }
+
+    if (fts_close(fts) != 0) {
+        PLOG(ERROR) << "fts_close";
+    }
+}
+
+// Look up an encryption policy  The policy (key reference
+// and encryption options) to use is read from files that were written by vold.
+static bool LookupPolicy(const std::string& ref_basename, EncryptionPolicy* policy) {
+    std::string ref_filename = std::string("/data") + ref_basename;
+    if (!android::base::ReadFileToString(ref_filename, &policy->key_raw_ref)) {
+        LOG(ERROR) << "Unable to read system policy with name " << ref_filename;
+        return false;
+    }
+
+    auto options_filename = std::string("/data") + fscrypt_key_mode;
+    std::string options_string;
+    if (!android::base::ReadFileToString(options_filename, &options_string)) {
+        LOG(ERROR) << "Cannot read encryption options string";
+        return false;
+    }
+    if (!ParseOptions(options_string, &policy->options)) {
+        LOG(ERROR) << "Invalid encryption options string: " << options_string;
+        return false;
+    }
+    return true;
+}
+
+static bool EnsurePolicyOrLog(const EncryptionPolicy& policy, const std::string& dir) {
+    if (!EnsurePolicy(policy, dir)) {
+        std::string ref_hex;
+        BytesToHex(policy.key_raw_ref, &ref_hex);
+        LOG(ERROR) << "Setting " << ref_hex << " policy on " << dir << " failed!";
+        return false;
+    }
+    return true;
+}
+
+static bool SetPolicyOn(const std::string& ref_basename, const std::string& dir) {
+    EncryptionPolicy policy;
+    if (!LookupPolicy(ref_basename, &policy)) return false;
+    if (!EnsurePolicyOrLog(policy, dir)) return false;
+    return true;
+}
+
+bool FscryptSetDirectoryPolicy(const std::string& ref_basename, FscryptAction action,
+                               const std::string& dir) {
+    if (action == FscryptAction::kNone) {
+        return true;
+    }
+    if (SetPolicyOn(ref_basename, dir) || action == FscryptAction::kAttempt) {
+        return true;
+    }
+    if (action == FscryptAction::kDeleteIfNecessary) {
+        LOG(ERROR) << "Setting policy failed, deleting: " << dir;
+        delete_dir_contents(dir);
+        return SetPolicyOn(ref_basename, dir);
+    }
+    return false;
+}
diff --git a/libmemunreachable/tests/HostMallocStub.cpp b/init/fscrypt_init_extensions.h
similarity index 67%
rename from libmemunreachable/tests/HostMallocStub.cpp
rename to init/fscrypt_init_extensions.h
index 0ef0487..d357bb2 100644
--- a/libmemunreachable/tests/HostMallocStub.cpp
+++ b/init/fscrypt_init_extensions.h
@@ -14,8 +14,17 @@
  * limitations under the License.
  */
 
-#include "bionic.h"
+#pragma once
 
-void malloc_disable() {}
+#include <string>
 
-void malloc_enable() {}
+enum class FscryptAction {
+    kNone,
+    kAttempt,
+    kRequire,
+    kDeleteIfNecessary,
+};
+
+bool FscryptInstallKeyring();
+bool FscryptSetDirectoryPolicy(const std::string& ref_basename, FscryptAction action,
+                               const std::string& dir);
diff --git a/init/host_init_stubs.h b/init/host_init_stubs.h
index f9a08a5..caa8f8d 100644
--- a/init/host_init_stubs.h
+++ b/init/host_init_stubs.h
@@ -26,6 +26,7 @@
 
 // android/api-level.h
 #define __ANDROID_API_P__ 28
+#define __ANDROID_API_Q__ 29
 #define __ANDROID_API_R__ 30
 
 // sys/system_properties.h
@@ -38,19 +39,10 @@
 inline bool CanReadProperty(const std::string&, const std::string&) {
     return true;
 }
-inline uint32_t SetProperty(const std::string& key, const std::string& value) {
-    android::base::SetProperty(key, value);
-    return 0;
-}
-inline uint32_t (*property_set)(const std::string& name, const std::string& value) = SetProperty;
-inline uint32_t HandlePropertySet(const std::string&, const std::string&, const std::string&,
-                                  const ucred&, std::string*) {
-    return 0;
-}
 
 // reboot_utils.h
 inline void SetFatalRebootTarget() {}
-inline void __attribute__((noreturn)) InitFatalReboot() {
+inline void __attribute__((noreturn)) InitFatalReboot(int signal_number) {
     abort();
 }
 
diff --git a/init/host_init_verifier.cpp b/init/host_init_verifier.cpp
index b2402b3..22de846 100644
--- a/init/host_init_verifier.cpp
+++ b/init/host_init_verifier.cpp
@@ -14,6 +14,8 @@
 // limitations under the License.
 //
 
+#include "host_init_verifier.h"
+
 #include <errno.h>
 #include <getopt.h>
 #include <pwd.h>
@@ -30,6 +32,8 @@
 #include <android-base/logging.h>
 #include <android-base/parseint.h>
 #include <android-base/strings.h>
+#include <hidl/metadata.h>
+#include <property_info_serializer/property_info_serializer.h>
 
 #include "action.h"
 #include "action_manager.h"
@@ -52,6 +56,10 @@
 using android::base::ParseInt;
 using android::base::ReadFileToString;
 using android::base::Split;
+using android::properties::BuildTrie;
+using android::properties::ParsePropertyInfoFile;
+using android::properties::PropertyInfoArea;
+using android::properties::PropertyInfoEntry;
 
 static std::vector<std::string> passwd_files;
 
@@ -142,43 +150,89 @@
 #include "generated_stub_builtin_function_map.h"
 
 void PrintUsage() {
-    std::cout << "usage: host_init_verifier [-p FILE] -i FILE <init rc file>\n"
+    std::cout << "usage: host_init_verifier [options] <init rc file>\n"
                  "\n"
                  "Tests an init script for correctness\n"
                  "\n"
                  "-p FILE\tSearch this passwd file for users and groups\n"
-                 "-i FILE\tParse this JSON file for the HIDL interface inheritance hierarchy\n"
+                 "--property_contexts=FILE\t Use this file for property_contexts\n"
               << std::endl;
 }
 
+Result<InterfaceInheritanceHierarchyMap> ReadInterfaceInheritanceHierarchy() {
+    InterfaceInheritanceHierarchyMap result;
+    for (const HidlInterfaceMetadata& iface : HidlInterfaceMetadata::all()) {
+        std::set<FQName> inherited_interfaces;
+        for (const std::string& intf : iface.inherited) {
+            FQName fqname;
+            if (!fqname.setTo(intf)) {
+                return Error() << "Unable to parse interface '" << intf << "'";
+            }
+            inherited_interfaces.insert(fqname);
+        }
+        FQName fqname;
+        if (!fqname.setTo(iface.name)) {
+            return Error() << "Unable to parse interface '" << iface.name << "'";
+        }
+        result[fqname] = inherited_interfaces;
+    }
+
+    return result;
+}
+
+const PropertyInfoArea* property_info_area;
+
+void HandlePropertyContexts(const std::string& filename,
+                            std::vector<PropertyInfoEntry>* property_infos) {
+    auto file_contents = std::string();
+    if (!ReadFileToString(filename, &file_contents)) {
+        PLOG(ERROR) << "Could not read properties from '" << filename << "'";
+        exit(EXIT_FAILURE);
+    }
+
+    auto errors = std::vector<std::string>{};
+    ParsePropertyInfoFile(file_contents, true, property_infos, &errors);
+    for (const auto& error : errors) {
+        LOG(ERROR) << "Could not read line from '" << filename << "': " << error;
+    }
+    if (!errors.empty()) {
+        exit(EXIT_FAILURE);
+    }
+}
+
 int main(int argc, char** argv) {
     android::base::InitLogging(argv, &android::base::StdioLogger);
     android::base::SetMinimumLogSeverity(android::base::ERROR);
 
-    std::string interface_inheritance_hierarchy_file;
+    auto property_infos = std::vector<PropertyInfoEntry>();
 
     while (true) {
+        static const char kPropertyContexts[] = "property-contexts=";
         static const struct option long_options[] = {
                 {"help", no_argument, nullptr, 'h'},
+                {kPropertyContexts, required_argument, nullptr, 0},
                 {nullptr, 0, nullptr, 0},
         };
 
-        int arg = getopt_long(argc, argv, "p:i:", long_options, nullptr);
+        int option_index;
+        int arg = getopt_long(argc, argv, "p:", long_options, &option_index);
 
         if (arg == -1) {
             break;
         }
 
         switch (arg) {
+            case 0:
+                if (long_options[option_index].name == kPropertyContexts) {
+                    HandlePropertyContexts(optarg, &property_infos);
+                }
+                break;
             case 'h':
                 PrintUsage();
                 return EXIT_FAILURE;
             case 'p':
                 passwd_files.emplace_back(optarg);
                 break;
-            case 'i':
-                interface_inheritance_hierarchy_file = optarg;
-                break;
             default:
                 std::cerr << "getprop: getopt returned invalid result: " << arg << std::endl;
                 return EXIT_FAILURE;
@@ -188,19 +242,28 @@
     argc -= optind;
     argv += optind;
 
-    if (argc != 1 || interface_inheritance_hierarchy_file.empty()) {
+    if (argc != 1) {
         PrintUsage();
         return EXIT_FAILURE;
     }
 
-    auto interface_inheritance_hierarchy_map =
-            ReadInterfaceInheritanceHierarchy(interface_inheritance_hierarchy_file);
+    auto interface_inheritance_hierarchy_map = ReadInterfaceInheritanceHierarchy();
     if (!interface_inheritance_hierarchy_map) {
         LOG(ERROR) << interface_inheritance_hierarchy_map.error();
         return EXIT_FAILURE;
     }
     SetKnownInterfaces(*interface_inheritance_hierarchy_map);
 
+    std::string serialized_contexts;
+    std::string trie_error;
+    if (!BuildTrie(property_infos, "u:object_r:default_prop:s0", "string", &serialized_contexts,
+                   &trie_error)) {
+        LOG(ERROR) << "Unable to serialize property contexts: " << trie_error;
+        return EXIT_FAILURE;
+    }
+
+    property_info_area = reinterpret_cast<const PropertyInfoArea*>(serialized_contexts.c_str());
+
     const BuiltinFunctionMap& function_map = GetBuiltinFunctionMap();
     Action::set_function_map(&function_map);
     ActionManager& am = ActionManager::GetInstance();
diff --git a/init/boringssl_self_test.h b/init/host_init_verifier.h
similarity index 78%
rename from init/boringssl_self_test.h
rename to init/host_init_verifier.h
index 9e717d0..5d24f2a 100644
--- a/init/boringssl_self_test.h
+++ b/init/host_init_verifier.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
+ * Copyright (C) 2019 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,13 +16,12 @@
 
 #pragma once
 
-#include "builtin_arguments.h"
-#include "result.h"
+#include <property_info_parser/property_info_parser.h>
 
 namespace android {
 namespace init {
 
-Result<void> StartBoringSslSelfTest(const BuiltinArguments&);
+extern const android::properties::PropertyInfoArea* property_info_area;
 
 }  // namespace init
 }  // namespace android
diff --git a/init/init.cpp b/init/init.cpp
index 18fb0c3..5f97e44 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -19,7 +19,6 @@
 #include <dirent.h>
 #include <fcntl.h>
 #include <pthread.h>
-#include <seccomp_policy.h>
 #include <signal.h>
 #include <stdlib.h>
 #include <string.h>
@@ -28,6 +27,9 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
+#include <sys/_system_properties.h>
+
 #include <functional>
 #include <map>
 #include <memory>
@@ -51,16 +53,17 @@
 #include <selinux/android.h>
 
 #include "action_parser.h"
-#include "boringssl_self_test.h"
 #include "builtins.h"
 #include "epoll.h"
 #include "first_stage_init.h"
 #include "first_stage_mount.h"
 #include "import_parser.h"
 #include "keychords.h"
+#include "lmkd_service.h"
 #include "mount_handler.h"
 #include "mount_namespace.h"
 #include "property_service.h"
+#include "proto_utils.h"
 #include "reboot.h"
 #include "reboot_utils.h"
 #include "security.h"
@@ -69,6 +72,7 @@
 #include "service.h"
 #include "service_parser.h"
 #include "sigchld_handler.h"
+#include "system/core/init/property_service.pb.h"
 #include "util.h"
 
 using namespace std::chrono_literals;
@@ -77,6 +81,7 @@
 using android::base::boot_clock;
 using android::base::GetProperty;
 using android::base::ReadFileToString;
+using android::base::SetProperty;
 using android::base::StringPrintf;
 using android::base::Timer;
 using android::base::Trim;
@@ -87,19 +92,16 @@
 
 static int property_triggers_enabled = 0;
 
-static char qemu[32];
-
 static int signal_fd = -1;
+static int property_fd = -1;
 
 static std::unique_ptr<Timer> waiting_for_prop(nullptr);
 static std::string wait_prop_name;
 static std::string wait_prop_value;
-static bool shutting_down;
 static std::string shutdown_command;
 static bool do_shutdown = false;
-static bool load_debug_prop = false;
 
-static std::vector<Subcontext>* subcontexts;
+static std::unique_ptr<Subcontext> subcontext;
 
 void DumpState() {
     ServiceList::GetInstance().DumpState();
@@ -109,20 +111,22 @@
 Parser CreateParser(ActionManager& action_manager, ServiceList& service_list) {
     Parser parser;
 
-    parser.AddSectionParser(
-            "service", std::make_unique<ServiceParser>(&service_list, subcontexts, std::nullopt));
-    parser.AddSectionParser("on", std::make_unique<ActionParser>(&action_manager, subcontexts));
+    parser.AddSectionParser("service", std::make_unique<ServiceParser>(
+                                               &service_list, subcontext.get(), std::nullopt));
+    parser.AddSectionParser("on",
+                            std::make_unique<ActionParser>(&action_manager, subcontext.get()));
     parser.AddSectionParser("import", std::make_unique<ImportParser>(&parser));
 
     return parser;
 }
 
 // parser that only accepts new services
-Parser CreateServiceOnlyParser(ServiceList& service_list) {
+Parser CreateServiceOnlyParser(ServiceList& service_list, bool from_apex) {
     Parser parser;
 
-    parser.AddSectionParser(
-            "service", std::make_unique<ServiceParser>(&service_list, subcontexts, std::nullopt));
+    parser.AddSectionParser("service",
+                            std::make_unique<ServiceParser>(&service_list, subcontext.get(),
+                                                            std::nullopt, from_apex));
     return parser;
 }
 
@@ -131,7 +135,7 @@
 
     std::string bootscript = GetProperty("ro.boot.init_rc", "");
     if (bootscript.empty()) {
-        parser.ParseConfig("/init.rc");
+        parser.ParseConfig("/system/etc/init/hw/init.rc");
         if (!parser.ParseConfig("/system/etc/init")) {
             late_import_paths.emplace_back("/system/etc/init");
         }
@@ -175,6 +179,16 @@
     waiting_for_prop.reset();
 }
 
+static void TriggerShutdown(const std::string& command) {
+    // We can't call HandlePowerctlMessage() directly in this function,
+    // because it modifies the contents of the action queue, which can cause the action queue
+    // to get into a bad state if this function is called from a command being executed by the
+    // action queue.  Instead we set this flag and ensure that shutdown happens before the next
+    // command is run in the main init loop.
+    shutdown_command = command;
+    do_shutdown = true;
+}
+
 void property_changed(const std::string& name, const std::string& value) {
     // If the property is sys.powerctl, we bypass the event queue and immediately handle it.
     // This is to ensure that init will always and immediately shutdown/reboot, regardless of
@@ -183,16 +197,7 @@
     // In non-thermal-shutdown case, 'shutdown' trigger will be fired to let device specific
     // commands to be executed.
     if (name == "sys.powerctl") {
-        // Despite the above comment, we can't call HandlePowerctlMessage() in this function,
-        // because it modifies the contents of the action queue, which can cause the action queue
-        // to get into a bad state if this function is called from a command being executed by the
-        // action queue.  Instead we set this flag and ensure that shutdown happens before the next
-        // command is run in the main init loop.
-        // TODO: once property service is removed from init, this will never happen from a builtin,
-        // but rather from a callback from the property service socket, in which case this hack can
-        // go away.
-        shutdown_command = value;
-        do_shutdown = true;
+        TriggerShutdown(value);
     }
 
     if (property_triggers_enabled) ActionManager::GetInstance().QueuePropertyChange(name, value);
@@ -202,7 +207,7 @@
     // to wait.
     if (name == kColdBootDoneProp) {
         auto time_waited = waiting_for_prop ? waiting_for_prop->duration().count() : 0;
-        property_set("ro.boottime.init.cold_boot_wait", std::to_string(time_waited));
+        SetProperty("ro.boottime.init.cold_boot_wait", std::to_string(time_waited));
     }
 
     if (waiting_for_prop) {
@@ -305,9 +310,6 @@
         process_cmdline = "unknown process";
     }
 
-    LOG(INFO) << "Received control message '" << msg << "' for '" << name << "' from pid: " << pid
-              << " (" << process_cmdline << ")";
-
     const ControlMessageFunction& function = it->second;
 
     Service* svc = nullptr;
@@ -320,20 +322,25 @@
             svc = ServiceList::GetInstance().FindInterface(name);
             break;
         default:
-            LOG(ERROR) << "Invalid function target from static map key '" << msg << "': "
+            LOG(ERROR) << "Invalid function target from static map key ctl." << msg << ": "
                        << static_cast<std::underlying_type<ControlTarget>::type>(function.target);
             return false;
     }
 
     if (svc == nullptr) {
-        LOG(ERROR) << "Could not find '" << name << "' for ctl." << msg;
+        LOG(ERROR) << "Control message: Could not find '" << name << "' for ctl." << msg
+                   << " from pid: " << pid << " (" << process_cmdline << ")";
         return false;
     }
 
     if (auto result = function.action(svc); !result) {
-        LOG(ERROR) << "Could not ctl." << msg << " for '" << name << "': " << result.error();
+        LOG(ERROR) << "Control message: Could not ctl." << msg << " for '" << name
+                   << "' from pid: " << pid << " (" << process_cmdline << "): " << result.error();
         return false;
     }
+
+    LOG(INFO) << "Control message: Processed ctl." << msg << " for '" << name
+              << "' from pid: " << pid << " (" << process_cmdline << ")";
     return true;
 }
 
@@ -356,85 +363,15 @@
     return {};
 }
 
-static void import_kernel_nv(const std::string& key, const std::string& value, bool for_emulator) {
-    if (key.empty()) return;
-
-    if (for_emulator) {
-        // In the emulator, export any kernel option with the "ro.kernel." prefix.
-        property_set("ro.kernel." + key, value);
-        return;
-    }
-
-    if (key == "qemu") {
-        strlcpy(qemu, value.c_str(), sizeof(qemu));
-    } else if (android::base::StartsWith(key, "androidboot.")) {
-        property_set("ro.boot." + key.substr(12), value);
-    }
-}
-
 static void export_oem_lock_status() {
     if (!android::base::GetBoolProperty("ro.oem_unlock_supported", false)) {
         return;
     }
-    import_kernel_cmdline(
-            false, [](const std::string& key, const std::string& value, bool in_qemu) {
-                if (key == "androidboot.verifiedbootstate") {
-                    property_set("ro.boot.flash.locked", value == "orange" ? "0" : "1");
-                }
-            });
-}
-
-static void export_kernel_boot_props() {
-    constexpr const char* UNSET = "";
-    struct {
-        const char *src_prop;
-        const char *dst_prop;
-        const char *default_value;
-    } prop_map[] = {
-        { "ro.boot.serialno",   "ro.serialno",   UNSET, },
-        { "ro.boot.mode",       "ro.bootmode",   "unknown", },
-        { "ro.boot.baseband",   "ro.baseband",   "unknown", },
-        { "ro.boot.bootloader", "ro.bootloader", "unknown", },
-        { "ro.boot.hardware",   "ro.hardware",   "unknown", },
-        { "ro.boot.revision",   "ro.revision",   "0", },
-    };
-    for (const auto& prop : prop_map) {
-        std::string value = GetProperty(prop.src_prop, prop.default_value);
-        if (value != UNSET)
-            property_set(prop.dst_prop, value);
-    }
-}
-
-static void process_kernel_dt() {
-    if (!is_android_dt_value_expected("compatible", "android,firmware")) {
-        return;
-    }
-
-    std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir(get_android_dt_dir().c_str()), closedir);
-    if (!dir) return;
-
-    std::string dt_file;
-    struct dirent *dp;
-    while ((dp = readdir(dir.get())) != NULL) {
-        if (dp->d_type != DT_REG || !strcmp(dp->d_name, "compatible") || !strcmp(dp->d_name, "name")) {
-            continue;
+    ImportKernelCmdline([](const std::string& key, const std::string& value) {
+        if (key == "androidboot.verifiedbootstate") {
+            SetProperty("ro.boot.flash.locked", value == "orange" ? "0" : "1");
         }
-
-        std::string file_name = get_android_dt_dir() + dp->d_name;
-
-        android::base::ReadFileToString(file_name, &dt_file);
-        std::replace(dt_file.begin(), dt_file.end(), ',', '.');
-
-        property_set("ro.boot."s + dp->d_name, dt_file);
-    }
-}
-
-static void process_kernel_cmdline() {
-    // The first pass does the common stuff, and finds if we are in qemu.
-    // The second pass is only necessary for qemu to export all kernel params
-    // as properties.
-    import_kernel_cmdline(false, import_kernel_nv);
-    if (qemu[0]) import_kernel_cmdline(true, import_kernel_nv);
+    });
 }
 
 static Result<void> property_enable_triggers_action(const BuiltinArguments& args) {
@@ -460,7 +397,7 @@
     while ((dp = readdir(dir.get())) != nullptr) {
         if (dp->d_name[0] == '.') continue;
 
-        property_set("sys.usb.controller", dp->d_name);
+        SetProperty("sys.usb.controller", dp->d_name);
         break;
     }
 }
@@ -573,26 +510,31 @@
     }
 }
 
-static void GlobalSeccomp() {
-    import_kernel_cmdline(false, [](const std::string& key, const std::string& value,
-                                    bool in_qemu) {
-        if (key == "androidboot.seccomp" && value == "global" && !set_global_seccomp_filter()) {
-            LOG(FATAL) << "Failed to globally enable seccomp!";
-        }
-    });
-}
-
 static void UmountDebugRamdisk() {
     if (umount("/debug_ramdisk") != 0) {
-        LOG(ERROR) << "Failed to umount /debug_ramdisk";
+        PLOG(ERROR) << "Failed to umount /debug_ramdisk";
     }
 }
 
+static void MountExtraFilesystems() {
+#define CHECKCALL(x) \
+    if ((x) != 0) PLOG(FATAL) << #x " failed.";
+
+    // /apex is used to mount APEXes
+    CHECKCALL(mount("tmpfs", "/apex", "tmpfs", MS_NOEXEC | MS_NOSUID | MS_NODEV,
+                    "mode=0755,uid=0,gid=0"));
+
+    // /linkerconfig is used to keep generated linker configuration
+    CHECKCALL(mount("tmpfs", "/linkerconfig", "tmpfs", MS_NOEXEC | MS_NOSUID | MS_NODEV,
+                    "mode=0755,uid=0,gid=0"));
+#undef CHECKCALL
+}
+
 static void RecordStageBoottimes(const boot_clock::time_point& second_stage_start_time) {
     int64_t first_stage_start_time_ns = -1;
     if (auto first_stage_start_time_str = getenv(kEnvFirstStageStartedAt);
         first_stage_start_time_str) {
-        property_set("ro.boottime.init", first_stage_start_time_str);
+        SetProperty("ro.boottime.init", first_stage_start_time_str);
         android::base::ParseInt(first_stage_start_time_str, &first_stage_start_time_ns);
     }
     unsetenv(kEnvFirstStageStartedAt);
@@ -606,11 +548,73 @@
     if (selinux_start_time_ns == -1) return;
     if (first_stage_start_time_ns == -1) return;
 
-    property_set("ro.boottime.init.first_stage",
-                 std::to_string(selinux_start_time_ns - first_stage_start_time_ns));
-    property_set("ro.boottime.init.selinux",
-                 std::to_string(second_stage_start_time.time_since_epoch().count() -
-                                selinux_start_time_ns));
+    SetProperty("ro.boottime.init.first_stage",
+                std::to_string(selinux_start_time_ns - first_stage_start_time_ns));
+    SetProperty("ro.boottime.init.selinux",
+                std::to_string(second_stage_start_time.time_since_epoch().count() -
+                               selinux_start_time_ns));
+}
+
+void SendLoadPersistentPropertiesMessage() {
+    auto init_message = InitMessage{};
+    init_message.set_load_persistent_properties(true);
+    if (auto result = SendMessage(property_fd, init_message); !result) {
+        LOG(ERROR) << "Failed to send load persistent properties message: " << result.error();
+    }
+}
+
+void SendStopSendingMessagesMessage() {
+    auto init_message = InitMessage{};
+    init_message.set_stop_sending_messages(true);
+    if (auto result = SendMessage(property_fd, init_message); !result) {
+        LOG(ERROR) << "Failed to send 'stop sending messages' message: " << result.error();
+    }
+}
+
+void SendStartSendingMessagesMessage() {
+    auto init_message = InitMessage{};
+    init_message.set_start_sending_messages(true);
+    if (auto result = SendMessage(property_fd, init_message); !result) {
+        LOG(ERROR) << "Failed to send 'start sending messages' message: " << result.error();
+    }
+}
+
+static void HandlePropertyFd() {
+    auto message = ReadMessage(property_fd);
+    if (!message) {
+        LOG(ERROR) << "Could not read message from property service: " << message.error();
+        return;
+    }
+
+    auto property_message = PropertyMessage{};
+    if (!property_message.ParseFromString(*message)) {
+        LOG(ERROR) << "Could not parse message from property service";
+        return;
+    }
+
+    switch (property_message.msg_case()) {
+        case PropertyMessage::kControlMessage: {
+            auto& control_message = property_message.control_message();
+            bool success = HandleControlMessage(control_message.msg(), control_message.name(),
+                                                control_message.pid());
+
+            uint32_t response = success ? PROP_SUCCESS : PROP_ERROR_HANDLE_CONTROL_MESSAGE;
+            if (control_message.has_fd()) {
+                int fd = control_message.fd();
+                TEMP_FAILURE_RETRY(send(fd, &response, sizeof(response), 0));
+                close(fd);
+            }
+            break;
+        }
+        case PropertyMessage::kChangedMessage: {
+            auto& changed_message = property_message.changed_message();
+            property_changed(changed_message.name(), changed_message.value());
+            break;
+        }
+        default:
+            LOG(ERROR) << "Unknown message type from property service: "
+                       << property_message.msg_case();
+    }
 }
 
 int SecondStageMain(int argc, char** argv) {
@@ -620,17 +624,22 @@
 
     boot_clock::time_point start_time = boot_clock::now();
 
+    trigger_shutdown = TriggerShutdown;
+
     SetStdioToDevNull(argv);
     InitKernelLogging(argv);
     LOG(INFO) << "init second stage started!";
 
-    // Set init and its forked children's oom_adj.
-    if (auto result = WriteFile("/proc/1/oom_score_adj", "-1000"); !result) {
-        LOG(ERROR) << "Unable to write -1000 to /proc/1/oom_score_adj: " << result.error();
-    }
+    // Will handle EPIPE at the time of write by checking the errno
+    signal(SIGPIPE, SIG_IGN);
 
-    // Enable seccomp if global boot option was passed (otherwise it is enabled in zygote).
-    GlobalSeccomp();
+    // Set init and its forked children's oom_adj.
+    if (auto result =
+                WriteFile("/proc/1/oom_score_adj", StringPrintf("%d", DEFAULT_OOM_SCORE_ADJUST));
+        !result) {
+        LOG(ERROR) << "Unable to write " << DEFAULT_OOM_SCORE_ADJUST
+                   << " to /proc/1/oom_score_adj: " << result.error();
+    }
 
     // Set up a session keyring that all processes will have access to. It
     // will hold things like FBE encryption keys. No process should override
@@ -640,34 +649,30 @@
     // Indicate that booting is in progress to background fw loaders, etc.
     close(open("/dev/.booting", O_WRONLY | O_CREAT | O_CLOEXEC, 0000));
 
-    property_init();
-
-    // If arguments are passed both on the command line and in DT,
-    // properties set in DT always have priority over the command-line ones.
-    process_kernel_dt();
-    process_kernel_cmdline();
-
-    // Propagate the kernel variables to internal variables
-    // used by init as well as the current required properties.
-    export_kernel_boot_props();
-
-    // Make the time that init stages started available for bootstat to log.
-    RecordStageBoottimes(start_time);
-
-    // Set libavb version for Framework-only OTA match in Treble build.
-    const char* avb_version = getenv("INIT_AVB_VERSION");
-    if (avb_version) property_set("ro.boot.avb_version", avb_version);
-
     // See if need to load debug props to allow adb root, when the device is unlocked.
     const char* force_debuggable_env = getenv("INIT_FORCE_DEBUGGABLE");
+    bool load_debug_prop = false;
     if (force_debuggable_env && AvbHandle::IsDeviceUnlocked()) {
         load_debug_prop = "true"s == force_debuggable_env;
     }
-
-    // Clean up our environment.
-    unsetenv("INIT_AVB_VERSION");
     unsetenv("INIT_FORCE_DEBUGGABLE");
 
+    // Umount the debug ramdisk so property service doesn't read .prop files from there, when it
+    // is not meant to.
+    if (!load_debug_prop) {
+        UmountDebugRamdisk();
+    }
+
+    PropertyInit();
+
+    // Umount the debug ramdisk after property service has read the .prop files when it means to.
+    if (load_debug_prop) {
+        UmountDebugRamdisk();
+    }
+
+    // Mount extra filesystems required during second stage init
+    MountExtraFilesystems();
+
     // Now set up SELinux for second stage.
     SelinuxSetupKernelLogging();
     SelabelInitialize();
@@ -680,11 +685,22 @@
 
     InstallSignalFdHandler(&epoll);
 
-    property_load_boot_defaults(load_debug_prop);
-    UmountDebugRamdisk();
+    StartPropertyService(&property_fd);
+    if (auto result = epoll.RegisterHandler(property_fd, HandlePropertyFd); !result) {
+        LOG(FATAL) << "Could not register epoll handler for property fd: " << result.error();
+    }
+
+    // Make the time that init stages started available for bootstat to log.
+    RecordStageBoottimes(start_time);
+
+    // Set libavb version for Framework-only OTA match in Treble build.
+    if (const char* avb_version = getenv("INIT_AVB_VERSION"); avb_version != nullptr) {
+        SetProperty("ro.boot.avb_version", avb_version);
+    }
+    unsetenv("INIT_AVB_VERSION");
+
     fs_mgr_vendor_overlay_mount_all();
     export_oem_lock_status();
-    StartPropertyService(&epoll);
     MountHandler mount_handler(&epoll);
     set_usb_controller();
 
@@ -695,7 +711,7 @@
         PLOG(FATAL) << "SetupMountNamespaces failed";
     }
 
-    subcontexts = InitializeSubcontexts();
+    subcontext = InitializeSubcontext();
 
     ActionManager& am = ActionManager::GetInstance();
     ServiceList& sm = ServiceList::GetInstance();
@@ -708,13 +724,14 @@
 
     // Make the GSI status available before scripts start running.
     if (android::gsi::IsGsiRunning()) {
-        property_set("ro.gsid.image_running", "1");
+        SetProperty("ro.gsid.image_running", "1");
     } else {
-        property_set("ro.gsid.image_running", "0");
+        SetProperty("ro.gsid.image_running", "0");
     }
 
     am.QueueBuiltinAction(SetupCgroupsAction, "SetupCgroups");
 
+    am.QueueBuiltinAction(SetKptrRestrictAction, "SetKptrRestrict");
     am.QueueEventTrigger("early-init");
 
     // Queue an action that waits for coldboot done so we know ueventd has set up all of /dev...
@@ -722,7 +739,6 @@
     // ... so that we can start queuing up actions that require stuff from /dev.
     am.QueueBuiltinAction(MixHwrngIntoLinuxRngAction, "MixHwrngIntoLinuxRng");
     am.QueueBuiltinAction(SetMmapRndBitsAction, "SetMmapRndBits");
-    am.QueueBuiltinAction(SetKptrRestrictAction, "SetKptrRestrict");
     Keychords keychords;
     am.QueueBuiltinAction(
             [&epoll, &keychords](const BuiltinArguments& args) -> Result<void> {
@@ -737,9 +753,6 @@
     // Trigger all the boot actions to get us started.
     am.QueueEventTrigger("init");
 
-    // Starting the BoringSSL self test, for NIAP certification compliance.
-    am.QueueBuiltinAction(StartBoringSslSelfTest, "StartBoringSslSelfTest");
-
     // Repeat mix_hwrng_into_linux_rng in case /dev/hw_random or /dev/random
     // wasn't ready immediately after wait_for_coldboot_done
     am.QueueBuiltinAction(MixHwrngIntoLinuxRngAction, "MixHwrngIntoLinuxRng");
@@ -759,18 +772,16 @@
         // By default, sleep until something happens.
         auto epoll_timeout = std::optional<std::chrono::milliseconds>{};
 
-        if (do_shutdown && !shutting_down) {
+        if (do_shutdown && !IsShuttingDown()) {
             do_shutdown = false;
-            if (HandlePowerctlMessage(shutdown_command)) {
-                shutting_down = true;
-            }
+            HandlePowerctlMessage(shutdown_command);
         }
 
         if (!(waiting_for_prop || Service::is_exec_service_running())) {
             am.ExecuteOneCommand();
         }
         if (!(waiting_for_prop || Service::is_exec_service_running())) {
-            if (!shutting_down) {
+            if (!IsShuttingDown()) {
                 auto next_process_action_time = HandleProcessActions();
 
                 // If there's a process that needs restarting, wake up in time for that.
@@ -785,8 +796,17 @@
             if (am.HasMoreCommands()) epoll_timeout = 0ms;
         }
 
-        if (auto result = epoll.Wait(epoll_timeout); !result) {
-            LOG(ERROR) << result.error();
+        auto pending_functions = epoll.Wait(epoll_timeout);
+        if (!pending_functions) {
+            LOG(ERROR) << pending_functions.error();
+        } else if (!pending_functions->empty()) {
+            // We always reap children before responding to the other pending functions. This is to
+            // prevent a race where other daemons see that a service has exited and ask init to
+            // start it again via ctl.start before init has reaped it.
+            ReapAnyOutstandingChildren();
+            for (const auto& function : *pending_functions) {
+                (*function)();
+            }
         }
     }
 
diff --git a/init/init.h b/init/init.h
index cfc28f1..4bbca6f 100644
--- a/init/init.h
+++ b/init/init.h
@@ -29,11 +29,7 @@
 namespace init {
 
 Parser CreateParser(ActionManager& action_manager, ServiceList& service_list);
-Parser CreateServiceOnlyParser(ServiceList& service_list);
-
-bool HandleControlMessage(const std::string& msg, const std::string& arg, pid_t pid);
-
-void property_changed(const std::string& name, const std::string& value);
+Parser CreateServiceOnlyParser(ServiceList& service_list, bool from_apex);
 
 bool start_waiting_for_property(const char *name, const char *value);
 
@@ -41,6 +37,10 @@
 
 void ResetWaitForProp();
 
+void SendLoadPersistentPropertiesMessage();
+void SendStopSendingMessagesMessage();
+void SendStartSendingMessagesMessage();
+
 int SecondStageMain(int argc, char** argv);
 
 }  // namespace init
diff --git a/init/init_test.cpp b/init/init_test.cpp
index 0411214..9f63e4f 100644
--- a/init/init_test.cpp
+++ b/init/init_test.cpp
@@ -93,6 +93,26 @@
     EXPECT_TRUE(expect_true);
 }
 
+TEST(init, WrongEventTrigger) {
+    std::string init_script =
+            R"init(
+on boot:
+pass_test
+)init";
+
+    TemporaryFile tf;
+    ASSERT_TRUE(tf.fd != -1);
+    ASSERT_TRUE(android::base::WriteStringToFd(init_script, tf.fd));
+
+    ActionManager am;
+
+    Parser parser;
+    parser.AddSectionParser("on", std::make_unique<ActionParser>(&am, nullptr));
+
+    ASSERT_TRUE(parser.ParseConfig(tf.path));
+    ASSERT_EQ(1u, parser.parse_error_count());
+}
+
 TEST(init, EventTriggerOrder) {
     std::string init_script =
         R"init(
@@ -221,3 +241,19 @@
 
 }  // namespace init
 }  // namespace android
+
+int SubcontextTestChildMain(int, char**);
+int FirmwareTestChildMain(int, char**);
+
+int main(int argc, char** argv) {
+    if (argc > 1 && !strcmp(argv[1], "subcontext")) {
+        return SubcontextTestChildMain(argc, argv);
+    }
+
+    if (argc > 1 && !strcmp(argv[1], "firmware")) {
+        return FirmwareTestChildMain(argc, argv);
+    }
+
+    testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+}
diff --git a/init/interface_utils.cpp b/init/interface_utils.cpp
index a54860f..1b76bba 100644
--- a/init/interface_utils.cpp
+++ b/init/interface_utils.cpp
@@ -21,7 +21,6 @@
 
 #include <android-base/strings.h>
 #include <hidl-util/FqInstance.h>
-#include <json/json.h>
 
 using android::FqInstance;
 using android::FQName;
@@ -42,41 +41,16 @@
 
 }  // namespace
 
-Result<InterfaceInheritanceHierarchyMap> ReadInterfaceInheritanceHierarchy(
-        const std::string& path) {
-    Json::Value root;
-    Json::Reader reader;
-    std::ifstream stream(path);
-    if (!reader.parse(stream, root)) {
-        return Error() << "Failed to read interface inheritance hierarchy file: " << path << "\n"
-                       << reader.getFormattedErrorMessages();
-    }
-
-    InterfaceInheritanceHierarchyMap result;
-    for (const Json::Value& entry : root) {
-        std::set<FQName> inherited_interfaces;
-        for (const Json::Value& intf : entry["inheritedInterfaces"]) {
-            FQName fqname;
-            if (!fqname.setTo(intf.asString())) {
-                return Error() << "Unable to parse interface '" << intf.asString() << "'";
-            }
-            inherited_interfaces.insert(fqname);
-        }
-        std::string intf_string = entry["interface"].asString();
-        FQName fqname;
-        if (!fqname.setTo(intf_string)) {
-            return Error() << "Unable to parse interface '" << intf_string << "'";
-        }
-        result[fqname] = inherited_interfaces;
-    }
-
-    return result;
-}
-
 Result<void> CheckInterfaceInheritanceHierarchy(const std::set<std::string>& instances,
                                                 const InterfaceInheritanceHierarchyMap& hierarchy) {
     std::set<FQName> interface_fqnames;
     for (const std::string& instance : instances) {
+        // There is insufficient build-time information on AIDL interfaces to check them here
+        // TODO(b/139307527): Rework how services store interfaces to avoid excess string parsing
+        if (base::Split(instance, "/")[0] == "aidl") {
+            continue;
+        }
+
         FqInstance fqinstance;
         if (!fqinstance.setTo(instance)) {
             return Error() << "Unable to parse interface instance '" << instance << "'";
diff --git a/init/interface_utils.h b/init/interface_utils.h
index bd0c104..4ca377f 100644
--- a/init/interface_utils.h
+++ b/init/interface_utils.h
@@ -29,9 +29,6 @@
 
 using InterfaceInheritanceHierarchyMap = std::map<android::FQName, std::set<android::FQName>>;
 
-// Reads the HIDL interface inheritance hierarchy JSON file at the given path.
-Result<InterfaceInheritanceHierarchyMap> ReadInterfaceInheritanceHierarchy(const std::string& path);
-
 // For the given set of interfaces / interface instances, checks that each
 // interface's hierarchy of inherited interfaces is also included in the given
 // interface set. Uses the provided hierarchy data.
diff --git a/init/keychords_test.cpp b/init/keychords_test.cpp
index 33373d4..6e9b337 100644
--- a/init/keychords_test.cpp
+++ b/init/keychords_test.cpp
@@ -212,7 +212,11 @@
 }
 
 void TestFrame::RelaxForMs(std::chrono::milliseconds wait) {
-    epoll_.Wait(wait);
+    auto pending_functions = epoll_.Wait(wait);
+    ASSERT_TRUE(pending_functions) << pending_functions.error();
+    for (const auto& function : *pending_functions) {
+        (*function)();
+    }
 }
 
 void TestFrame::SetChord(int key, bool value) {
diff --git a/init/lmkd_service.cpp b/init/lmkd_service.cpp
new file mode 100644
index 0000000..dd1ab4d
--- /dev/null
+++ b/init/lmkd_service.cpp
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "lmkd_service.h"
+
+#include <errno.h>
+
+#include <android-base/logging.h>
+#include <liblmkd_utils.h>
+
+#include "service_list.h"
+
+namespace android {
+namespace init {
+
+enum LmkdRegistrationResult {
+    LMKD_REG_SUCCESS,
+    LMKD_CONN_FAILED,
+    LMKD_REG_FAILED,
+};
+
+static int lmkd_socket = -1;
+
+static LmkdRegistrationResult RegisterProcess(uid_t uid, pid_t pid, int oom_score_adjust) {
+    // connect to lmkd if not already connected
+    if (lmkd_socket < 0) {
+        lmkd_socket = lmkd_connect();
+        if (lmkd_socket < 0) {
+            return LMKD_CONN_FAILED;
+        }
+    }
+
+    // register service with lmkd
+    struct lmk_procprio params;
+    params.pid = pid;
+    params.uid = uid;
+    params.oomadj = oom_score_adjust;
+    params.ptype = PROC_TYPE_SERVICE;
+    if (lmkd_register_proc(lmkd_socket, &params) != 0) {
+        // data transfer failed, reset the connection
+        close(lmkd_socket);
+        lmkd_socket = -1;
+        return LMKD_REG_FAILED;
+    }
+
+    return LMKD_REG_SUCCESS;
+}
+
+static bool UnregisterProcess(pid_t pid) {
+    if (lmkd_socket < 0) {
+        // no connection or it was lost, no need to unregister
+        return false;
+    }
+
+    // unregister service
+    struct lmk_procremove params;
+    params.pid = pid;
+    if (lmkd_unregister_proc(lmkd_socket, &params) != 0) {
+        // data transfer failed, reset the connection
+        close(lmkd_socket);
+        lmkd_socket = -1;
+        return false;
+    }
+
+    return true;
+}
+
+static void RegisterServices(pid_t exclude_pid) {
+    for (const auto& service : ServiceList::GetInstance().services()) {
+        auto svc = service.get();
+        if (svc->oom_score_adjust() != DEFAULT_OOM_SCORE_ADJUST) {
+            // skip if process is excluded or not yet forked (pid==0)
+            if (svc->pid() == exclude_pid || svc->pid() == 0) {
+                continue;
+            }
+            if (RegisterProcess(svc->uid(), svc->pid(), svc->oom_score_adjust()) !=
+                LMKD_REG_SUCCESS) {
+                // a failure here resets the connection, will retry during next registration
+                break;
+            }
+        }
+    }
+}
+
+void LmkdRegister(const std::string& name, uid_t uid, pid_t pid, int oom_score_adjust) {
+    bool new_connection = lmkd_socket == -1;
+    LmkdRegistrationResult result;
+
+    result = RegisterProcess(uid, pid, oom_score_adjust);
+    if (result == LMKD_REG_FAILED) {
+        // retry one time if connection to lmkd was lost
+        result = RegisterProcess(uid, pid, oom_score_adjust);
+        new_connection = result == LMKD_REG_SUCCESS;
+    }
+    switch (result) {
+        case LMKD_REG_SUCCESS:
+            // register existing services once new connection is established
+            if (new_connection) {
+                RegisterServices(pid);
+            }
+            break;
+        case LMKD_CONN_FAILED:
+            PLOG(ERROR) << "lmkd connection failed when " << name << " process got started";
+            break;
+        case LMKD_REG_FAILED:
+            PLOG(ERROR) << "lmkd failed to register " << name << " process";
+            break;
+    }
+}
+
+void LmkdUnregister(const std::string& name, pid_t pid) {
+    if (!UnregisterProcess(pid)) {
+        PLOG(ERROR) << "lmkd failed to unregister " << name << " process";
+    }
+}
+
+}  // namespace init
+}  // namespace android
diff --git a/init/lmkd_service.h b/init/lmkd_service.h
new file mode 100644
index 0000000..5b51d52
--- /dev/null
+++ b/init/lmkd_service.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <sys/types.h>
+
+#include <string>
+
+namespace android {
+namespace init {
+
+static const int MIN_OOM_SCORE_ADJUST = -1000;
+static const int MAX_OOM_SCORE_ADJUST = 1000;
+// service with default score is unkillable
+static const int DEFAULT_OOM_SCORE_ADJUST = MIN_OOM_SCORE_ADJUST;
+
+#if defined(__ANDROID__)
+
+void LmkdRegister(const std::string& name, uid_t uid, pid_t pid, int oom_score_adjust);
+void LmkdUnregister(const std::string& name, pid_t pid);
+
+#else  // defined(__ANDROID__)
+
+static inline void LmkdRegister(const std::string&, uid_t, pid_t, int) {}
+static inline void LmkdUnregister(const std::string&, pid_t) {}
+
+#endif  // defined(__ANDROID__)
+
+}  // namespace init
+}  // namespace android
diff --git a/init/mount_handler.cpp b/init/mount_handler.cpp
index 791a019..0e4e024 100644
--- a/init/mount_handler.cpp
+++ b/init/mount_handler.cpp
@@ -38,7 +38,6 @@
 #include <libdm/dm.h>
 
 #include "epoll.h"
-#include "property_service.h"
 
 namespace android {
 namespace init {
@@ -96,7 +95,7 @@
     // handling, except for clearing non-existent or already clear property.
     // Goal is reduction of empty properties and associated triggers.
     if (value.empty() && android::base::GetProperty(mount_prop, "").empty()) return;
-    property_set(mount_prop, value);
+    android::base::SetProperty(mount_prop, value);
 }
 
 }  // namespace
diff --git a/init/mount_namespace.cpp b/init/mount_namespace.cpp
index 12144c1..c33e0de 100644
--- a/init/mount_namespace.cpp
+++ b/init/mount_namespace.cpp
@@ -25,6 +25,7 @@
 #include <android-base/file.h>
 #include <android-base/logging.h>
 #include <android-base/properties.h>
+#include <android-base/result.h>
 #include <android-base/unique_fd.h>
 
 #include "util.h"
@@ -79,34 +80,73 @@
     return updatable;
 }
 
+static Result<void> MountDir(const std::string& path, const std::string& mount_path) {
+    if (int ret = mkdir(mount_path.c_str(), 0755); ret != 0 && ret != EEXIST) {
+        return ErrnoError() << "Could not create mount point " << mount_path;
+    }
+    if (mount(path.c_str(), mount_path.c_str(), nullptr, MS_BIND, nullptr) != 0) {
+        return ErrnoError() << "Could not bind mount " << path << " to " << mount_path;
+    }
+    return {};
+}
+
+static Result<void> ActivateFlattenedApexesFrom(const std::string& from_dir,
+                                                const std::string& to_dir) {
+    std::unique_ptr<DIR, decltype(&closedir)> dir(opendir(from_dir.c_str()), closedir);
+    if (!dir) {
+        return {};
+    }
+    dirent* entry;
+    while ((entry = readdir(dir.get())) != nullptr) {
+        if (entry->d_name[0] == '.') continue;
+        if (entry->d_type == DT_DIR) {
+            const std::string apex_path = from_dir + "/" + entry->d_name;
+            const std::string mount_path = to_dir + "/" + entry->d_name;
+            if (auto result = MountDir(apex_path, mount_path); !result) {
+                return result;
+            }
+        }
+    }
+    return {};
+}
+
 static bool ActivateFlattenedApexesIfPossible() {
     if (IsRecoveryMode() || IsApexUpdatable()) {
         return true;
     }
 
-    constexpr const char kSystemApex[] = "/system/apex";
-    constexpr const char kApexTop[] = "/apex";
-    if (mount(kSystemApex, kApexTop, nullptr, MS_BIND, nullptr) != 0) {
-        PLOG(ERROR) << "Could not bind mount " << kSystemApex << " to " << kApexTop;
-        return false;
-    }
+    const std::string kApexTop = "/apex";
+    const std::vector<std::string> kBuiltinDirsForApexes = {
+            "/system/apex",
+            "/system_ext/apex",
+            "/product/apex",
+            "/vendor/apex",
+    };
 
-    // Special casing for the runtime APEX
-    constexpr const char kRuntimeApexMountPath[] = "/system/apex/com.android.runtime";
-    static const std::vector<std::string> kRuntimeApexDirNames = {"com.android.runtime.release",
-                                                                  "com.android.runtime.debug"};
+    for (const auto& dir : kBuiltinDirsForApexes) {
+        if (auto result = ActivateFlattenedApexesFrom(dir, kApexTop); !result) {
+            LOG(ERROR) << result.error();
+            return false;
+        }
+    }
+    // Special casing for the ART APEX
+    constexpr const char kArtApexMountPath[] = "/apex/com.android.art";
+    static const std::vector<std::string> kArtApexDirNames = {"com.android.art.release",
+                                                              "com.android.art.debug"};
     bool success = false;
-    for (const auto& name : kRuntimeApexDirNames) {
-        std::string path = std::string(kSystemApex) + "/" + name;
+    for (const auto& name : kArtApexDirNames) {
+        std::string path = kApexTop + "/" + name;
         if (access(path.c_str(), F_OK) == 0) {
-            if (mount(path.c_str(), kRuntimeApexMountPath, nullptr, MS_BIND, nullptr) == 0) {
-                success = true;
-                break;
+            if (auto result = MountDir(path, kArtApexMountPath); !result) {
+                LOG(ERROR) << result.error();
+                return false;
             }
+            success = true;
+            break;
         }
     }
     if (!success) {
-        PLOG(ERROR) << "Failed to bind mount the runtime APEX to " << kRuntimeApexMountPath;
+        PLOG(ERROR) << "Failed to bind mount the ART APEX to " << kArtApexMountPath;
     }
     return success;
 }
@@ -132,6 +172,11 @@
     // the bootstrap namespace get APEXes from the read-only partition.
     if (!(MakePrivate("/apex"))) return false;
 
+    // /linkerconfig is a private mountpoint to give a different linker configuration
+    // based on the mount namespace. Subdirectory will be bind-mounted based on current mount
+    // namespace
+    if (!(MakePrivate("/linkerconfig"))) return false;
+
     bootstrap_ns_fd.reset(OpenMountNamespace());
     bootstrap_ns_id = GetMountNamespaceId();
 
diff --git a/init/persistent_properties.cpp b/init/persistent_properties.cpp
index baa9ad4..1758cfa 100644
--- a/init/persistent_properties.cpp
+++ b/init/persistent_properties.cpp
@@ -31,10 +31,11 @@
 
 #include "util.h"
 
+using android::base::Dirname;
 using android::base::ReadFdToString;
 using android::base::StartsWith;
-using android::base::WriteStringToFd;
 using android::base::unique_fd;
+using android::base::WriteStringToFd;
 
 namespace android {
 namespace init {
@@ -191,6 +192,18 @@
         unlink(temp_filename.c_str());
         return Error(saved_errno) << "Unable to rename persistent property file";
     }
+
+    // rename() is atomic with regards to the kernel's filesystem buffers, but the parent
+    // directories must be fsync()'ed otherwise, the rename is not necessarily written to storage.
+    // Note in this case, that the source and destination directories are the same, so only one
+    // fsync() is required.
+    auto dir = Dirname(persistent_property_filename);
+    auto dir_fd = unique_fd{open(dir.c_str(), O_DIRECTORY | O_RDONLY | O_CLOEXEC)};
+    if (dir_fd < 0) {
+        return ErrnoError() << "Unable to open persistent properties directory for fsync()";
+    }
+    fsync(dir_fd);
+
     return {};
 }
 
diff --git a/init/property_service.cpp b/init/property_service.cpp
index 17622a3..5b35ad2 100644
--- a/init/property_service.cpp
+++ b/init/property_service.cpp
@@ -39,10 +39,10 @@
 #define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
 #include <sys/_system_properties.h>
 
-#include <atomic>
 #include <map>
 #include <memory>
 #include <mutex>
+#include <optional>
 #include <queue>
 #include <thread>
 #include <vector>
@@ -53,7 +53,6 @@
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
-#include <android-base/unique_fd.h>
 #include <property_info_parser/property_info_parser.h>
 #include <property_info_serializer/property_info_serializer.h>
 #include <selinux/android.h>
@@ -61,11 +60,14 @@
 #include <selinux/selinux.h>
 
 #include "debug_ramdisk.h"
+#include "epoll.h"
 #include "init.h"
 #include "persistent_properties.h"
 #include "property_type.h"
+#include "proto_utils.h"
 #include "selinux.h"
 #include "subcontext.h"
+#include "system/core/init/property_service.pb.h"
 #include "util.h"
 
 using namespace std::literals;
@@ -87,20 +89,14 @@
 namespace android {
 namespace init {
 
-static constexpr const char kRestoreconProperty[] = "selinux.restorecon_recursive";
-
 static bool persistent_properties_loaded = false;
 
 static int property_set_fd = -1;
+static int init_socket = -1;
+static bool accept_messages = false;
 
 static PropertyInfoAreaFile property_info_area;
 
-uint32_t InitPropertySet(const std::string& name, const std::string& value);
-
-uint32_t (*property_set)(const std::string& name, const std::string& value) = InitPropertySet;
-
-void CreateSerializedPropertyInfo();
-
 struct PropertyAuditData {
     const ucred* cr;
     const char* name;
@@ -119,21 +115,6 @@
     return 0;
 }
 
-void property_init() {
-    selinux_callback cb;
-    cb.func_audit = PropertyAuditCallback;
-    selinux_set_callback(SELINUX_CB_AUDIT, cb);
-
-    mkdir("/dev/__properties__", S_IRWXU | S_IXGRP | S_IXOTH);
-    CreateSerializedPropertyInfo();
-    if (__system_property_area_init()) {
-        LOG(FATAL) << "Failed to initialize property area";
-    }
-    if (!property_info_area.LoadDefaultPath()) {
-        LOG(FATAL) << "Failed to load serialized property info file";
-    }
-}
-
 bool CanReadProperty(const std::string& source_context, const std::string& name) {
     const char* target_context = nullptr;
     property_info_area->GetPropertyInfo(name.c_str(), &target_context, nullptr);
@@ -166,6 +147,17 @@
     return has_access;
 }
 
+static void SendPropertyChanged(const std::string& name, const std::string& value) {
+    auto property_msg = PropertyMessage{};
+    auto* changed_message = property_msg.mutable_changed_message();
+    changed_message->set_name(name);
+    changed_message->set_value(value);
+
+    if (auto result = SendMessage(init_socket, property_msg); !result) {
+        LOG(ERROR) << "Failed to send property changed message: " << result.error();
+    }
+}
+
 static uint32_t PropertySet(const std::string& name, const std::string& value, std::string* error) {
     size_t valuelen = value.size();
 
@@ -201,7 +193,11 @@
     if (persistent_properties_loaded && StartsWith(name, "persist.")) {
         WritePersistentProperty(name, value);
     }
-    property_changed(name, value);
+    // If init hasn't started its main loop, then it won't be handling property changed messages
+    // anyway, so there's no need to try to send them.
+    if (accept_messages) {
+        SendPropertyChanged(name, value);
+    }
     return PROP_SUCCESS;
 }
 
@@ -241,35 +237,10 @@
     bool thread_started_ = false;
 };
 
-uint32_t InitPropertySet(const std::string& name, const std::string& value) {
-    if (StartsWith(name, "ctl.")) {
-        LOG(ERROR) << "InitPropertySet: Do not set ctl. properties from init; call the Service "
-                      "functions directly";
-        return PROP_ERROR_INVALID_NAME;
-    }
-    if (name == kRestoreconProperty) {
-        LOG(ERROR) << "InitPropertySet: Do not set '" << kRestoreconProperty
-                   << "' from init; use the restorecon builtin directly";
-        return PROP_ERROR_INVALID_NAME;
-    }
-
-    uint32_t result = 0;
-    ucred cr = {.pid = 1, .uid = 0, .gid = 0};
-    std::string error;
-    result = HandlePropertySet(name, value, kInitContext.c_str(), cr, &error);
-    if (result != PROP_SUCCESS) {
-        LOG(ERROR) << "Init cannot set '" << name << "' to '" << value << "': " << error;
-    }
-
-    return result;
-}
-
 class SocketConnection {
   public:
     SocketConnection(int socket, const ucred& cred) : socket_(socket), cred_(cred) {}
 
-    ~SocketConnection() { close(socket_); }
-
     bool RecvUint32(uint32_t* value, uint32_t* timeout_ms) {
         return RecvFully(value, sizeof(*value), timeout_ms);
     }
@@ -306,6 +277,9 @@
     }
 
     bool SendUint32(uint32_t value) {
+        if (!socket_.ok()) {
+            return true;
+        }
         int result = TEMP_FAILURE_RETRY(send(socket_, &value, sizeof(value), 0));
         return result == sizeof(value);
     }
@@ -320,7 +294,7 @@
         return true;
     }
 
-    int socket() { return socket_; }
+    [[nodiscard]] int Release() { return socket_.release(); }
 
     const ucred& cred() { return cred_; }
 
@@ -391,12 +365,46 @@
         return bytes_left == 0;
     }
 
-    int socket_;
+    unique_fd socket_;
     ucred cred_;
 
     DISALLOW_IMPLICIT_CONSTRUCTORS(SocketConnection);
 };
 
+static uint32_t SendControlMessage(const std::string& msg, const std::string& name, pid_t pid,
+                                   SocketConnection* socket, std::string* error) {
+    if (!accept_messages) {
+        *error = "Received control message after shutdown, ignoring";
+        return PROP_ERROR_HANDLE_CONTROL_MESSAGE;
+    }
+
+    auto property_msg = PropertyMessage{};
+    auto* control_message = property_msg.mutable_control_message();
+    control_message->set_msg(msg);
+    control_message->set_name(name);
+    control_message->set_pid(pid);
+
+    // We must release the fd before sending it to init, otherwise there will be a race with init.
+    // If init calls close() before Release(), then fdsan will see the wrong tag and abort().
+    int fd = -1;
+    if (socket != nullptr && SelinuxGetVendorAndroidVersion() > __ANDROID_API_Q__) {
+        fd = socket->Release();
+        control_message->set_fd(fd);
+    }
+
+    if (auto result = SendMessage(init_socket, property_msg); !result) {
+        // We've already released the fd above, so if we fail to send the message to init, we need
+        // to manually free it here.
+        if (fd != -1) {
+            close(fd);
+        }
+        *error = "Failed to send control message: " + result.error().message();
+        return PROP_ERROR_HANDLE_CONTROL_MESSAGE;
+    }
+
+    return PROP_SUCCESS;
+}
+
 bool CheckControlPropertyPerms(const std::string& name, const std::string& value,
                                const std::string& source_context, const ucred& cr) {
     // We check the legacy method first but these properties are dontaudit, so we only log an audit
@@ -453,7 +461,7 @@
         return PROP_ERROR_PERMISSION_DENIED;
     }
 
-    if (type == nullptr || !CheckType(type, value)) {
+    if (!CheckType(type, value)) {
         *error = StringPrintf("Property type check failed, value doesn't match expected type '%s'",
                               (type ?: "(null)"));
         return PROP_ERROR_INVALID_VALUE;
@@ -464,15 +472,14 @@
 
 // This returns one of the enum of PROP_SUCCESS or PROP_ERROR*.
 uint32_t HandlePropertySet(const std::string& name, const std::string& value,
-                           const std::string& source_context, const ucred& cr, std::string* error) {
+                           const std::string& source_context, const ucred& cr,
+                           SocketConnection* socket, std::string* error) {
     if (auto ret = CheckPermissions(name, value, source_context, cr, error); ret != PROP_SUCCESS) {
         return ret;
     }
 
     if (StartsWith(name, "ctl.")) {
-        return HandleControlMessage(name.c_str() + 4, value, cr.pid)
-                       ? PROP_SUCCESS
-                       : PROP_ERROR_HANDLE_CONTROL_MESSAGE;
+        return SendControlMessage(name.c_str() + 4, value, cr.pid, socket, error);
     }
 
     // sys.powerctl is a special property that is used to make the device reboot.  We want to log
@@ -551,7 +558,8 @@
 
         const auto& cr = socket.cred();
         std::string error;
-        uint32_t result = HandlePropertySet(prop_name, prop_value, source_context, cr, &error);
+        uint32_t result =
+                HandlePropertySet(prop_name, prop_value, source_context, cr, nullptr, &error);
         if (result != PROP_SUCCESS) {
             LOG(ERROR) << "Unable to set property '" << prop_name << "' from uid:" << cr.uid
                        << " gid:" << cr.gid << " pid:" << cr.pid << ": " << error;
@@ -579,7 +587,7 @@
 
         const auto& cr = socket.cred();
         std::string error;
-        uint32_t result = HandlePropertySet(name, value, source_context, cr, &error);
+        uint32_t result = HandlePropertySet(name, value, source_context, cr, &socket, &error);
         if (result != PROP_SUCCESS) {
             LOG(ERROR) << "Unable to set property '" << name << "' from uid:" << cr.uid
                        << " gid:" << cr.gid << " pid:" << cr.pid << ": " << error;
@@ -595,6 +603,18 @@
     }
 }
 
+uint32_t InitPropertySet(const std::string& name, const std::string& value) {
+    uint32_t result = 0;
+    ucred cr = {.pid = 1, .uid = 0, .gid = 0};
+    std::string error;
+    result = HandlePropertySet(name, value, kInitContext, cr, nullptr, &error);
+    if (result != PROP_SUCCESS) {
+        LOG(ERROR) << "Init cannot set '" << name << "' to '" << value << "': " << error;
+    }
+
+    return result;
+}
+
 static bool load_properties_from_file(const char*, const char*,
                                       std::map<std::string, std::string>*);
 
@@ -607,11 +627,16 @@
     char *key, *value, *eol, *sol, *tmp, *fn;
     size_t flen = 0;
 
-    const char* context = kInitContext.c_str();
+    static constexpr const char* const kVendorPathPrefixes[2] = {
+            "/vendor",
+            "/odm",
+    };
+
+    const char* context = kInitContext;
     if (SelinuxGetVendorAndroidVersion() >= __ANDROID_API_P__) {
-        for (const auto& [path_prefix, secontext] : paths_and_secontexts) {
-            if (StartsWith(filename, path_prefix)) {
-                context = secontext;
+        for (const auto& vendor_path_prefix : kVendorPathPrefixes) {
+            if (StartsWith(filename, vendor_path_prefix)) {
+                context = kVendorContext;
             }
         }
     }
@@ -721,11 +746,11 @@
     bool is_debuggable = android::base::GetBoolProperty("ro.debuggable", false);
     std::string config = android::base::GetProperty("persist.sys.usb.config", "");
     if (config.empty()) {
-        property_set("persist.sys.usb.config", is_debuggable ? "adb" : "none");
+        InitPropertySet("persist.sys.usb.config", is_debuggable ? "adb" : "none");
     } else if (is_debuggable && config.find("adb") == std::string::npos &&
                config.length() + 4 < PROP_VALUE_MAX) {
         config.append(",adb");
-        property_set("persist.sys.usb.config", config);
+        InitPropertySet("persist.sys.usb.config", config);
     }
 }
 
@@ -743,33 +768,6 @@
     }
 }
 
-/* When booting an encrypted system, /data is not mounted when the
- * property service is started, so any properties stored there are
- * not loaded.  Vold triggers init to load these properties once it
- * has mounted /data.
- */
-void load_persist_props(void) {
-    // Devices with FDE have load_persist_props called twice; the first time when the temporary
-    // /data partition is mounted and then again once /data is truly mounted.  We do not want to
-    // read persistent properties from the temporary /data partition or mark persistent properties
-    // as having been loaded during the first call, so we return in that case.
-    std::string crypto_state = android::base::GetProperty("ro.crypto.state", "");
-    std::string crypto_type = android::base::GetProperty("ro.crypto.type", "");
-    if (crypto_state == "encrypted" && crypto_type == "block") {
-        static size_t num_calls = 0;
-        if (++num_calls == 1) return;
-    }
-
-    load_override_properties();
-    /* Read persistent properties after all default values have been loaded. */
-    auto persistent_properties = LoadPersistentProperties();
-    for (const auto& persistent_property_record : persistent_properties.properties()) {
-        property_set(persistent_property_record.name(), persistent_property_record.value());
-    }
-    persistent_properties_loaded = true;
-    property_set("ro.persistent_properties.ready", "true");
-}
-
 // If the ro.product.[brand|device|manufacturer|model|name] properties have not been explicitly
 // set, derive them from ro.product.${partition}.* properties
 static void property_initialize_ro_product_props() {
@@ -873,7 +871,7 @@
     }
 }
 
-void property_load_boot_defaults(bool load_debug_prop) {
+void PropertyLoadBootDefaults() {
     // TODO(b/117892318): merge prop.default and build.prop files into one
     // We read the properties and their values into a map, in order to always allow properties
     // loaded in the later property files to override the properties in loaded in the earlier
@@ -899,7 +897,7 @@
     load_properties_from_file("/product/build.prop", nullptr, &properties);
     load_properties_from_file("/factory/factory.prop", "ro.*", &properties);
 
-    if (load_debug_prop) {
+    if (access(kDebugRamdiskProp, R_OK) == 0) {
         LOG(INFO) << "Loading " << kDebugRamdiskProp;
         load_properties_from_file(kDebugRamdiskProp, nullptr, &properties);
     }
@@ -927,7 +925,8 @@
     }
 
     auto errors = std::vector<std::string>{};
-    ParsePropertyInfoFile(file_contents, property_infos, &errors);
+    bool require_prefix_or_exact = SelinuxGetVendorAndroidVersion() >= __ANDROID_API_R__;
+    ParsePropertyInfoFile(file_contents, require_prefix_or_exact, property_infos, &errors);
     // Individual parsing errors are reported but do not cause a failed boot, which is what
     // returning false would do here.
     for (const auto& error : errors) {
@@ -947,6 +946,10 @@
         // Don't check for failure here, so we always have a sane list of properties.
         // E.g. In case of recovery, the vendor partition will not have mounted and we
         // still need the system / platform properties to function.
+        if (access("/system_ext/etc/selinux/system_ext_property_contexts", R_OK) != -1) {
+            LoadPropertyInfoFromFile("/system_ext/etc/selinux/system_ext_property_contexts",
+                                     &property_infos);
+        }
         if (!LoadPropertyInfoFromFile("/vendor/etc/selinux/vendor_property_contexts",
                                       &property_infos)) {
             // Fallback to nonplat_* if vendor_* doesn't exist.
@@ -964,6 +967,7 @@
         if (!LoadPropertyInfoFromFile("/plat_property_contexts", &property_infos)) {
             return;
         }
+        LoadPropertyInfoFromFile("/system_ext_property_contexts", &property_infos);
         if (!LoadPropertyInfoFromFile("/vendor_property_contexts", &property_infos)) {
             // Fallback to nonplat_* if vendor_* doesn't exist.
             LoadPropertyInfoFromFile("/nonplat_property_contexts", &property_infos);
@@ -987,58 +991,183 @@
     selinux_android_restorecon(kPropertyInfosPath, 0);
 }
 
-void StartPropertyService(Epoll* epoll) {
-    property_set("ro.property_service.version", "2");
+static void ExportKernelBootProps() {
+    constexpr const char* UNSET = "";
+    struct {
+        const char* src_prop;
+        const char* dst_prop;
+        const char* default_value;
+    } prop_map[] = {
+            // clang-format off
+        { "ro.boot.serialno",   "ro.serialno",   UNSET, },
+        { "ro.boot.mode",       "ro.bootmode",   "unknown", },
+        { "ro.boot.baseband",   "ro.baseband",   "unknown", },
+        { "ro.boot.bootloader", "ro.bootloader", "unknown", },
+        { "ro.boot.hardware",   "ro.hardware",   "unknown", },
+        { "ro.boot.revision",   "ro.revision",   "0", },
+            // clang-format on
+    };
+    for (const auto& prop : prop_map) {
+        std::string value = GetProperty(prop.src_prop, prop.default_value);
+        if (value != UNSET) InitPropertySet(prop.dst_prop, value);
+    }
+}
+
+static void ProcessKernelDt() {
+    if (!is_android_dt_value_expected("compatible", "android,firmware")) {
+        return;
+    }
+
+    std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir(get_android_dt_dir().c_str()), closedir);
+    if (!dir) return;
+
+    std::string dt_file;
+    struct dirent* dp;
+    while ((dp = readdir(dir.get())) != NULL) {
+        if (dp->d_type != DT_REG || !strcmp(dp->d_name, "compatible") ||
+            !strcmp(dp->d_name, "name")) {
+            continue;
+        }
+
+        std::string file_name = get_android_dt_dir() + dp->d_name;
+
+        android::base::ReadFileToString(file_name, &dt_file);
+        std::replace(dt_file.begin(), dt_file.end(), ',', '.');
+
+        InitPropertySet("ro.boot."s + dp->d_name, dt_file);
+    }
+}
+
+static void ProcessKernelCmdline() {
+    bool for_emulator = false;
+    ImportKernelCmdline([&](const std::string& key, const std::string& value) {
+        if (key == "qemu") {
+            for_emulator = true;
+        } else if (StartsWith(key, "androidboot.")) {
+            InitPropertySet("ro.boot." + key.substr(12), value);
+        }
+    });
+
+    if (for_emulator) {
+        ImportKernelCmdline([&](const std::string& key, const std::string& value) {
+            // In the emulator, export any kernel option with the "ro.kernel." prefix.
+            InitPropertySet("ro.kernel." + key, value);
+        });
+    }
+}
+
+void PropertyInit() {
+    selinux_callback cb;
+    cb.func_audit = PropertyAuditCallback;
+    selinux_set_callback(SELINUX_CB_AUDIT, cb);
+
+    mkdir("/dev/__properties__", S_IRWXU | S_IXGRP | S_IXOTH);
+    CreateSerializedPropertyInfo();
+    if (__system_property_area_init()) {
+        LOG(FATAL) << "Failed to initialize property area";
+    }
+    if (!property_info_area.LoadDefaultPath()) {
+        LOG(FATAL) << "Failed to load serialized property info file";
+    }
+
+    // If arguments are passed both on the command line and in DT,
+    // properties set in DT always have priority over the command-line ones.
+    ProcessKernelDt();
+    ProcessKernelCmdline();
+
+    // Propagate the kernel variables to internal variables
+    // used by init as well as the current required properties.
+    ExportKernelBootProps();
+
+    PropertyLoadBootDefaults();
+}
+
+static void HandleInitSocket() {
+    auto message = ReadMessage(init_socket);
+    if (!message) {
+        LOG(ERROR) << "Could not read message from init_dedicated_recv_socket: " << message.error();
+        return;
+    }
+
+    auto init_message = InitMessage{};
+    if (!init_message.ParseFromString(*message)) {
+        LOG(ERROR) << "Could not parse message from init";
+        return;
+    }
+
+    switch (init_message.msg_case()) {
+        case InitMessage::kLoadPersistentProperties: {
+            load_override_properties();
+            // Read persistent properties after all default values have been loaded.
+            auto persistent_properties = LoadPersistentProperties();
+            for (const auto& persistent_property_record : persistent_properties.properties()) {
+                InitPropertySet(persistent_property_record.name(),
+                                persistent_property_record.value());
+            }
+            InitPropertySet("ro.persistent_properties.ready", "true");
+            persistent_properties_loaded = true;
+            break;
+        }
+        case InitMessage::kStopSendingMessages: {
+            accept_messages = false;
+            break;
+        }
+        case InitMessage::kStartSendingMessages: {
+            accept_messages = true;
+            break;
+        }
+        default:
+            LOG(ERROR) << "Unknown message type from init: " << init_message.msg_case();
+    }
+}
+
+static void PropertyServiceThread() {
+    Epoll epoll;
+    if (auto result = epoll.Open(); !result) {
+        LOG(FATAL) << result.error();
+    }
+
+    if (auto result = epoll.RegisterHandler(property_set_fd, handle_property_set_fd); !result) {
+        LOG(FATAL) << result.error();
+    }
+
+    if (auto result = epoll.RegisterHandler(init_socket, HandleInitSocket); !result) {
+        LOG(FATAL) << result.error();
+    }
+
+    while (true) {
+        auto pending_functions = epoll.Wait(std::nullopt);
+        if (!pending_functions) {
+            LOG(ERROR) << pending_functions.error();
+        } else {
+            for (const auto& function : *pending_functions) {
+                (*function)();
+            }
+        }
+    }
+}
+
+void StartPropertyService(int* epoll_socket) {
+    InitPropertySet("ro.property_service.version", "2");
+
+    int sockets[2];
+    if (socketpair(AF_UNIX, SOCK_SEQPACKET | SOCK_CLOEXEC, 0, sockets) != 0) {
+        PLOG(FATAL) << "Failed to socketpair() between property_service and init";
+    }
+    *epoll_socket = sockets[0];
+    init_socket = sockets[1];
+    accept_messages = true;
 
     if (auto result = CreateSocket(PROP_SERVICE_NAME, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
                                    false, 0666, 0, 0, {})) {
         property_set_fd = *result;
     } else {
-        PLOG(FATAL) << "start_property_service socket creation failed: " << result.error();
+        LOG(FATAL) << "start_property_service socket creation failed: " << result.error();
     }
 
     listen(property_set_fd, 8);
 
-    if (auto result = epoll->RegisterHandler(property_set_fd, handle_property_set_fd); !result) {
-        PLOG(FATAL) << result.error();
-    }
-}
-
-Result<int> CallFunctionAndHandlePropertiesImpl(const std::function<int()>& f) {
-    unique_fd reader;
-    unique_fd writer;
-    if (!Socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, &reader, &writer)) {
-        return ErrnoError() << "Could not create socket pair";
-    }
-
-    int result = 0;
-    std::atomic<bool> end = false;
-    auto thread = std::thread{[&f, &result, &end, &writer] {
-        result = f();
-        end = true;
-        send(writer, "1", 1, 0);
-    }};
-
-    Epoll epoll;
-    if (auto result = epoll.Open(); !result) {
-        return Error() << "Could not create epoll: " << result.error();
-    }
-    if (auto result = epoll.RegisterHandler(property_set_fd, handle_property_set_fd); !result) {
-        return Error() << "Could not register epoll handler for property fd: " << result.error();
-    }
-
-    // No-op function, just used to break from loop.
-    if (auto result = epoll.RegisterHandler(reader, [] {}); !result) {
-        return Error() << "Could not register epoll handler for ending thread:" << result.error();
-    }
-
-    while (!end) {
-        epoll.Wait({});
-    }
-
-    thread.join();
-
-    return result;
+    std::thread{PropertyServiceThread}.detach();
 }
 
 }  // namespace init
diff --git a/init/property_service.h b/init/property_service.h
index dc47b4d..506d116 100644
--- a/init/property_service.h
+++ b/init/property_service.h
@@ -18,34 +18,19 @@
 
 #include <sys/socket.h>
 
-#include <functional>
 #include <string>
 
 #include "epoll.h"
-#include "result.h"
 
 namespace android {
 namespace init {
 
+static constexpr const char kRestoreconProperty[] = "selinux.restorecon_recursive";
+
 bool CanReadProperty(const std::string& source_context, const std::string& name);
 
-extern uint32_t (*property_set)(const std::string& name, const std::string& value);
-
-uint32_t HandlePropertySet(const std::string& name, const std::string& value,
-                           const std::string& source_context, const ucred& cr, std::string* error);
-
-void property_init();
-void property_load_boot_defaults(bool load_debug_prop);
-void load_persist_props();
-void StartPropertyService(Epoll* epoll);
-
-template <typename F, typename... Args>
-Result<int> CallFunctionAndHandleProperties(F&& f, Args&&... args) {
-    Result<int> CallFunctionAndHandlePropertiesImpl(const std::function<int()>& f);
-
-    auto func = [&] { return f(args...); };
-    return CallFunctionAndHandlePropertiesImpl(func);
-}
+void PropertyInit();
+void StartPropertyService(int* epoll_socket);
 
 }  // namespace init
 }  // namespace android
diff --git a/init/property_service.proto b/init/property_service.proto
new file mode 100644
index 0000000..08268d9
--- /dev/null
+++ b/init/property_service.proto
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+syntax = "proto2";
+option optimize_for = LITE_RUNTIME;
+
+message PropertyMessage {
+    message ControlMessage {
+        optional string msg = 1;
+        optional string name = 2;
+        optional int32 pid = 3;
+        optional int32 fd = 4;
+    }
+
+    message ChangedMessage {
+        optional string name = 1;
+        optional string value = 2;
+    }
+
+    oneof msg {
+        ControlMessage control_message = 1;
+        ChangedMessage changed_message = 2;
+    };
+}
+
+message InitMessage {
+    oneof msg {
+        bool load_persistent_properties = 1;
+        bool stop_sending_messages = 2;
+        bool start_sending_messages = 3;
+    };
+}
diff --git a/init/property_service_test.cpp b/init/property_service_test.cpp
index c038aff..0f4cd0d 100644
--- a/init/property_service_test.cpp
+++ b/init/property_service_test.cpp
@@ -56,6 +56,11 @@
 }
 
 TEST(property_service, non_utf8_value) {
+    if (getuid() != 0) {
+        GTEST_SKIP() << "Skipping test, must be run as root.";
+        return;
+    }
+
     ASSERT_TRUE(SetProperty("property_service_utf8_test", "base_success"));
     EXPECT_FALSE(SetProperty("property_service_utf8_test", "\x80"));
     EXPECT_FALSE(SetProperty("property_service_utf8_test", "\xC2\x01"));
diff --git a/init/proto_utils.h b/init/proto_utils.h
new file mode 100644
index 0000000..93a7d57
--- /dev/null
+++ b/init/proto_utils.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include <string>
+
+#include "result.h"
+
+namespace android {
+namespace init {
+
+constexpr size_t kBufferSize = 4096;
+
+inline Result<std::string> ReadMessage(int socket) {
+    char buffer[kBufferSize] = {};
+    auto result = TEMP_FAILURE_RETRY(recv(socket, buffer, sizeof(buffer), 0));
+    if (result == 0) {
+        return Error();
+    } else if (result < 0) {
+        return ErrnoError();
+    }
+    return std::string(buffer, result);
+}
+
+template <typename T>
+Result<void> SendMessage(int socket, const T& message) {
+    std::string message_string;
+    if (!message.SerializeToString(&message_string)) {
+        return Error() << "Unable to serialize message";
+    }
+
+    if (message_string.size() > kBufferSize) {
+        return Error() << "Serialized message too long to send";
+    }
+
+    if (auto result =
+                TEMP_FAILURE_RETRY(send(socket, message_string.c_str(), message_string.size(), 0));
+        result != static_cast<long>(message_string.size())) {
+        return ErrnoError() << "send() failed to send message contents";
+    }
+    return {};
+}
+
+}  // namespace init
+}  // namespace android
diff --git a/init/reboot.cpp b/init/reboot.cpp
index b0b5b54..0e61234 100644
--- a/init/reboot.cpp
+++ b/init/reboot.cpp
@@ -22,6 +22,7 @@
 #include <linux/loop.h>
 #include <mntent.h>
 #include <semaphore.h>
+#include <stdlib.h>
 #include <sys/cdefs.h>
 #include <sys/ioctl.h>
 #include <sys/mount.h>
@@ -31,16 +32,19 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 
+#include <chrono>
 #include <memory>
 #include <set>
 #include <thread>
 #include <vector>
 
+#include <InitProperties.sysprop.h>
 #include <android-base/chrono_utils.h>
 #include <android-base/file.h>
 #include <android-base/logging.h>
 #include <android-base/macros.h>
 #include <android-base/properties.h>
+#include <android-base/scopeguard.h>
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
 #include <bootloader_message/bootloader_message.h>
@@ -50,25 +54,48 @@
 #include <private/android_filesystem_config.h>
 #include <selinux/selinux.h>
 
+#include "action.h"
 #include "action_manager.h"
+#include "builtin_arguments.h"
 #include "init.h"
-#include "property_service.h"
+#include "mount_namespace.h"
 #include "reboot_utils.h"
 #include "service.h"
 #include "service_list.h"
 #include "sigchld_handler.h"
+#include "util.h"
 
 #define PROC_SYSRQ "/proc/sysrq-trigger"
 
+using namespace std::literals;
+
+using android::base::boot_clock;
 using android::base::GetBoolProperty;
+using android::base::SetProperty;
 using android::base::Split;
 using android::base::Timer;
 using android::base::unique_fd;
+using android::base::WaitForProperty;
 using android::base::WriteStringToFile;
 
 namespace android {
 namespace init {
 
+static bool shutting_down = false;
+
+static const std::set<std::string> kDebuggingServices{"tombstoned", "logd", "adbd", "console"};
+
+static std::vector<Service*> GetDebuggingServices(bool only_post_data) {
+    std::vector<Service*> ret;
+    ret.reserve(kDebuggingServices.size());
+    for (const auto& s : ServiceList::GetInstance()) {
+        if (kDebuggingServices.count(s->name()) && (!only_post_data || s->is_post_data())) {
+            ret.push_back(s.get());
+        }
+    }
+    return ret;
+}
+
 // represents umount status during reboot / shutdown.
 enum UmountStat {
     /* umount succeeded. */
@@ -114,16 +141,16 @@
                     "-a",
                     mnt_fsname_.c_str(),
             };
-            android_fork_execvp_ext(arraysize(f2fs_argv), (char**)f2fs_argv, &st, true, LOG_KLOG,
-                                    true, nullptr, nullptr, 0);
+            logwrap_fork_execvp(arraysize(f2fs_argv), f2fs_argv, &st, false, LOG_KLOG, true,
+                                nullptr);
         } else if (IsExt4()) {
             const char* ext4_argv[] = {
                     "/system/bin/e2fsck",
                     "-y",
                     mnt_fsname_.c_str(),
             };
-            android_fork_execvp_ext(arraysize(ext4_argv), (char**)ext4_argv, &st, true, LOG_KLOG,
-                                    true, nullptr, nullptr, 0);
+            logwrap_fork_execvp(arraysize(ext4_argv), ext4_argv, &st, false, LOG_KLOG, true,
+                                nullptr);
         }
     }
 
@@ -158,11 +185,17 @@
     }
 }
 
-static void ShutdownVold() {
-    const char* vdc_argv[] = {"/system/bin/vdc", "volume", "shutdown"};
+static Result<void> CallVdc(const std::string& system, const std::string& cmd) {
+    const char* vdc_argv[] = {"/system/bin/vdc", system.c_str(), cmd.c_str()};
     int status;
-    android_fork_execvp_ext(arraysize(vdc_argv), (char**)vdc_argv, &status, true, LOG_KLOG, true,
-                            nullptr, nullptr, 0);
+    if (logwrap_fork_execvp(arraysize(vdc_argv), vdc_argv, &status, false, LOG_KLOG, true,
+                            nullptr) != 0) {
+        return ErrnoError() << "Failed to call '/system/bin/vdc " << system << " " << cmd << "'";
+    }
+    if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
+        return {};
+    }
+    return Error() << "'/system/bin/vdc " << system << " " << cmd << "' failed : " << status;
 }
 
 static void LogShutdownTime(UmountStat stat, Timer* t) {
@@ -170,11 +203,25 @@
                  << stat;
 }
 
-/* Find all read+write block devices and emulated devices in /proc/mounts
- * and add them to correpsponding list.
- */
-static bool FindPartitionsToUmount(std::vector<MountEntry>* blockDevPartitions,
-                                   std::vector<MountEntry>* emulatedPartitions, bool dump) {
+static bool IsDataMounted() {
+    std::unique_ptr<std::FILE, int (*)(std::FILE*)> fp(setmntent("/proc/mounts", "re"), endmntent);
+    if (fp == nullptr) {
+        PLOG(ERROR) << "Failed to open /proc/mounts";
+        return false;
+    }
+    mntent* mentry;
+    while ((mentry = getmntent(fp.get())) != nullptr) {
+        if (mentry->mnt_dir == "/data"s) {
+            return true;
+        }
+    }
+    return false;
+}
+
+// Find all read+write block devices and emulated devices in /proc/mounts and add them to
+// the correpsponding list.
+static bool FindPartitionsToUmount(std::vector<MountEntry>* block_dev_partitions,
+                                   std::vector<MountEntry>* emulated_partitions, bool dump) {
     std::unique_ptr<std::FILE, int (*)(std::FILE*)> fp(setmntent("/proc/mounts", "re"), endmntent);
     if (fp == nullptr) {
         PLOG(ERROR) << "Failed to open /proc/mounts";
@@ -191,10 +238,10 @@
             // Do not umount them as shutdown critical services may rely on them.
             if (mount_dir != "/" && mount_dir != "/system" && mount_dir != "/vendor" &&
                 mount_dir != "/oem") {
-                blockDevPartitions->emplace(blockDevPartitions->begin(), *mentry);
+                block_dev_partitions->emplace(block_dev_partitions->begin(), *mentry);
             }
         } else if (MountEntry::IsEmulatedDevice(*mentry)) {
-            emulatedPartitions->emplace(emulatedPartitions->begin(), *mentry);
+            emulated_partitions->emplace(emulated_partitions->begin(), *mentry);
         }
     }
     return true;
@@ -205,8 +252,8 @@
     if (!security_getenforce()) {
         LOG(INFO) << "Run lsof";
         const char* lsof_argv[] = {"/system/bin/lsof"};
-        android_fork_execvp_ext(arraysize(lsof_argv), (char**)lsof_argv, &status, true, LOG_KLOG,
-                                true, nullptr, nullptr, 0);
+        logwrap_fork_execvp(arraysize(lsof_argv), lsof_argv, &status, false, LOG_KLOG, true,
+                            nullptr);
     }
     FindPartitionsToUmount(nullptr, nullptr, true);
     // dump current CPU stack traces and uninterruptible tasks
@@ -256,8 +303,9 @@
 }
 
 // Create reboot/shutdwon monitor thread
-void RebootMonitorThread(unsigned int cmd, const std::string& rebootTarget, sem_t* reboot_semaphore,
-                         std::chrono::milliseconds shutdown_timeout, bool* reboot_monitor_run) {
+void RebootMonitorThread(unsigned int cmd, const std::string& reboot_target,
+                         sem_t* reboot_semaphore, std::chrono::milliseconds shutdown_timeout,
+                         bool* reboot_monitor_run) {
     unsigned int remaining_shutdown_time = 0;
 
     // 30 seconds more than the timeout passed to the thread as there is a final Umount pass
@@ -295,12 +343,15 @@
             LOG(ERROR) << "Reboot thread timed out";
 
             if (android::base::GetBoolProperty("ro.debuggable", false) == true) {
-                LOG(INFO) << "Try to dump init process call trace:";
-                const char* vdc_argv[] = {"/system/bin/debuggerd", "-b", "1"};
-                int status;
-                android_fork_execvp_ext(arraysize(vdc_argv), (char**)vdc_argv, &status, true,
-                                        LOG_KLOG, true, nullptr, nullptr, 0);
-
+                if (false) {
+                    // SEPolicy will block debuggerd from running and this is intentional.
+                    // But these lines are left to be enabled during debugging.
+                    LOG(INFO) << "Try to dump init process call trace:";
+                    const char* vdc_argv[] = {"/system/bin/debuggerd", "-b", "1"};
+                    int status;
+                    logwrap_fork_execvp(arraysize(vdc_argv), vdc_argv, &status, false, LOG_KLOG,
+                                        true, nullptr);
+                }
                 LOG(INFO) << "Show stack for all active CPU:";
                 WriteStringToFile("l", PROC_SYSRQ);
 
@@ -316,7 +367,7 @@
 
                 WriteStringToFile("u", PROC_SYSRQ);
 
-                RebootSystem(cmd, rebootTarget);
+                RebootSystem(cmd, reboot_target);
             }
 
             LOG(ERROR) << "Trigger crash at last!";
@@ -346,13 +397,13 @@
  *
  * return true when umount was successful. false when timed out.
  */
-static UmountStat TryUmountAndFsck(unsigned int cmd, const std::string& rebootTarget, bool runFsck,
+static UmountStat TryUmountAndFsck(unsigned int cmd, bool run_fsck,
                                    std::chrono::milliseconds timeout, sem_t* reboot_semaphore) {
     Timer t;
     std::vector<MountEntry> block_devices;
     std::vector<MountEntry> emulated_devices;
 
-    if (runFsck && !FindPartitionsToUmount(&block_devices, &emulated_devices, false)) {
+    if (run_fsck && !FindPartitionsToUmount(&block_devices, &emulated_devices, false)) {
         return UMOUNT_STAT_ERROR;
     }
 
@@ -366,7 +417,7 @@
         if ((st != UMOUNT_STAT_SUCCESS) && DUMP_ON_UMOUNT_FAILURE) DumpUmountDebuggingInfo();
     }
 
-    if (stat == UMOUNT_STAT_SUCCESS && runFsck) {
+    if (stat == UMOUNT_STAT_SUCCESS && run_fsck) {
         LOG(INFO) << "Pause reboot monitor thread before fsck";
         sem_post(reboot_semaphore);
 
@@ -387,11 +438,11 @@
 #define ZRAM_DEVICE   "/dev/block/zram0"
 #define ZRAM_RESET    "/sys/block/zram0/reset"
 #define ZRAM_BACK_DEV "/sys/block/zram0/backing_dev"
-static void KillZramBackingDevice() {
+static Result<void> KillZramBackingDevice() {
     std::string backing_dev;
-    if (!android::base::ReadFileToString(ZRAM_BACK_DEV, &backing_dev)) return;
+    if (!android::base::ReadFileToString(ZRAM_BACK_DEV, &backing_dev)) return {};
 
-    if (!android::base::StartsWith(backing_dev, "/dev/block/loop")) return;
+    if (!android::base::StartsWith(backing_dev, "/dev/block/loop")) return {};
 
     // cut the last "\n"
     backing_dev.erase(backing_dev.length() - 1);
@@ -400,41 +451,92 @@
     Timer swap_timer;
     LOG(INFO) << "swapoff() start...";
     if (swapoff(ZRAM_DEVICE) == -1) {
-        LOG(ERROR) << "zram_backing_dev: swapoff (" << backing_dev << ")" << " failed";
-        return;
+        return ErrnoError() << "zram_backing_dev: swapoff (" << backing_dev << ")"
+                            << " failed";
     }
     LOG(INFO) << "swapoff() took " << swap_timer;;
 
     if (!WriteStringToFile("1", ZRAM_RESET)) {
-        LOG(ERROR) << "zram_backing_dev: reset (" << backing_dev << ")" << " failed";
-        return;
+        return Error() << "zram_backing_dev: reset (" << backing_dev << ")"
+                       << " failed";
     }
 
     // clear loopback device
     unique_fd loop(TEMP_FAILURE_RETRY(open(backing_dev.c_str(), O_RDWR | O_CLOEXEC)));
     if (loop.get() < 0) {
-        LOG(ERROR) << "zram_backing_dev: open(" << backing_dev << ")" << " failed";
-        return;
+        return ErrnoError() << "zram_backing_dev: open(" << backing_dev << ")"
+                            << " failed";
     }
 
     if (ioctl(loop.get(), LOOP_CLR_FD, 0) < 0) {
-        LOG(ERROR) << "zram_backing_dev: loop_clear (" << backing_dev << ")" << " failed";
-        return;
+        return ErrnoError() << "zram_backing_dev: loop_clear (" << backing_dev << ")"
+                            << " failed";
     }
     LOG(INFO) << "zram_backing_dev: `" << backing_dev << "` is cleared successfully.";
+    return {};
+}
+
+// Stops given services, waits for them to be stopped for |timeout| ms.
+// If terminate is true, then SIGTERM is sent to services, otherwise SIGKILL is sent.
+static void StopServices(const std::vector<Service*>& services, std::chrono::milliseconds timeout,
+                         bool terminate) {
+    LOG(INFO) << "Stopping " << services.size() << " services by sending "
+              << (terminate ? "SIGTERM" : "SIGKILL");
+    std::vector<pid_t> pids;
+    pids.reserve(services.size());
+    for (const auto& s : services) {
+        if (s->pid() > 0) {
+            pids.push_back(s->pid());
+        }
+        if (terminate) {
+            s->Terminate();
+        } else {
+            s->Stop();
+        }
+    }
+    if (timeout > 0ms) {
+        WaitToBeReaped(pids, timeout);
+    } else {
+        // Even if we don't to wait for services to stop, we still optimistically reap zombies.
+        ReapAnyOutstandingChildren();
+    }
+}
+
+// Like StopServices, but also logs all the services that failed to stop after the provided timeout.
+// Returns number of violators.
+static int StopServicesAndLogViolations(const std::vector<Service*>& services,
+                                        std::chrono::milliseconds timeout, bool terminate) {
+    StopServices(services, timeout, terminate);
+    int still_running = 0;
+    for (const auto& s : services) {
+        if (s->IsRunning()) {
+            LOG(ERROR) << "[service-misbehaving] : service '" << s->name() << "' is still running "
+                       << timeout.count() << "ms after receiving "
+                       << (terminate ? "SIGTERM" : "SIGKILL");
+            still_running++;
+        }
+    }
+    return still_running;
 }
 
 //* Reboot / shutdown the system.
 // cmd ANDROID_RB_* as defined in android_reboot.h
 // reason Reason string like "reboot", "shutdown,userrequested"
-// rebootTarget Reboot target string like "bootloader". Otherwise, it should be an
-//              empty string.
-// runFsck Whether to run fsck after umount is done.
+// reboot_target Reboot target string like "bootloader". Otherwise, it should be an empty string.
+// run_fsck Whether to run fsck after umount is done.
 //
-static void DoReboot(unsigned int cmd, const std::string& reason, const std::string& rebootTarget,
-                     bool runFsck) {
+static void DoReboot(unsigned int cmd, const std::string& reason, const std::string& reboot_target,
+                     bool run_fsck) {
     Timer t;
-    LOG(INFO) << "Reboot start, reason: " << reason << ", rebootTarget: " << rebootTarget;
+    LOG(INFO) << "Reboot start, reason: " << reason << ", reboot_target: " << reboot_target;
+
+    // If /data isn't mounted then we can skip the extra reboot steps below, since we don't need to
+    // worry about unmounting it.
+    if (!IsDataMounted()) {
+        sync();
+        RebootSystem(cmd, reboot_target);
+        abort();
+    }
 
     // Ensure last reboot reason is reduced to canonical
     // alias reported in bootloader or system boot reason.
@@ -445,7 +547,7 @@
          reasons[1] == "hard" || reasons[1] == "warm")) {
         skip = strlen("reboot,");
     }
-    property_set(LAST_REBOOT_REASON_PROPERTY, reason.c_str() + skip);
+    SetProperty(LAST_REBOOT_REASON_PROPERTY, reason.c_str() + skip);
     sync();
 
     bool is_thermal_shutdown = cmd == ANDROID_RB_THERMOFF;
@@ -467,25 +569,26 @@
     if (sem_init(&reboot_semaphore, false, 0) == -1) {
         // These should never fail, but if they do, skip the graceful reboot and reboot immediately.
         LOG(ERROR) << "sem_init() fail and RebootSystem() return!";
-        RebootSystem(cmd, rebootTarget);
+        RebootSystem(cmd, reboot_target);
     }
 
     // Start a thread to monitor init shutdown process
     LOG(INFO) << "Create reboot monitor thread.";
     bool reboot_monitor_run = true;
-    std::thread reboot_monitor_thread(&RebootMonitorThread, cmd, rebootTarget, &reboot_semaphore,
+    std::thread reboot_monitor_thread(&RebootMonitorThread, cmd, reboot_target, &reboot_semaphore,
                                       shutdown_timeout, &reboot_monitor_run);
     reboot_monitor_thread.detach();
 
     // Start reboot monitor thread
     sem_post(&reboot_semaphore);
 
-    // keep debugging tools until non critical ones are all gone.
-    const std::set<std::string> kill_after_apps{"tombstoned", "logd", "adbd"};
     // watchdogd is a vendor specific component but should be alive to complete shutdown safely.
     const std::set<std::string> to_starts{"watchdogd"};
+    std::vector<Service*> stop_first;
+    stop_first.reserve(ServiceList::GetInstance().services().size());
     for (const auto& s : ServiceList::GetInstance()) {
-        if (kill_after_apps.count(s->name())) {
+        if (kDebuggingServices.count(s->name())) {
+            // keep debugging tools until non critical ones are all gone.
             s->SetShutdownCritical();
         } else if (to_starts.count(s->name())) {
             if (auto result = s->Start(); !result) {
@@ -499,6 +602,8 @@
                 LOG(ERROR) << "Could not start shutdown critical service '" << s->name()
                            << "': " << result.error();
             }
+        } else {
+            stop_first.push_back(s.get());
         }
     }
 
@@ -507,16 +612,16 @@
         TurnOffBacklight();
     }
 
-    Service* bootAnim = ServiceList::GetInstance().FindService("bootanim");
-    Service* surfaceFlinger = ServiceList::GetInstance().FindService("surfaceflinger");
-    if (bootAnim != nullptr && surfaceFlinger != nullptr && surfaceFlinger->IsRunning()) {
+    Service* boot_anim = ServiceList::GetInstance().FindService("bootanim");
+    Service* surface_flinger = ServiceList::GetInstance().FindService("surfaceflinger");
+    if (boot_anim != nullptr && surface_flinger != nullptr && surface_flinger->IsRunning()) {
         bool do_shutdown_animation = GetBoolProperty("ro.init.shutdown_animation", false);
 
         if (do_shutdown_animation) {
-            property_set("service.bootanim.exit", "0");
+            SetProperty("service.bootanim.exit", "0");
             // Could be in the middle of animation. Stop and start so that it can pick
             // up the right mode.
-            bootAnim->Stop();
+            boot_anim->Stop();
         }
 
         for (const auto& service : ServiceList::GetInstance()) {
@@ -532,72 +637,33 @@
         }
 
         if (do_shutdown_animation) {
-            bootAnim->Start();
-            surfaceFlinger->SetShutdownCritical();
-            bootAnim->SetShutdownCritical();
+            boot_anim->Start();
+            surface_flinger->SetShutdownCritical();
+            boot_anim->SetShutdownCritical();
         }
     }
 
     // optional shutdown step
     // 1. terminate all services except shutdown critical ones. wait for delay to finish
     if (shutdown_timeout > 0ms) {
-        LOG(INFO) << "terminating init services";
-
-        // Ask all services to terminate except shutdown critical ones.
-        for (const auto& s : ServiceList::GetInstance().services_in_shutdown_order()) {
-            if (!s->IsShutdownCritical()) s->Terminate();
-        }
-
-        int service_count = 0;
-        // Only wait up to half of timeout here
-        auto termination_wait_timeout = shutdown_timeout / 2;
-        while (t.duration() < termination_wait_timeout) {
-            ReapAnyOutstandingChildren();
-
-            service_count = 0;
-            for (const auto& s : ServiceList::GetInstance()) {
-                // Count the number of services running except shutdown critical.
-                // Exclude the console as it will ignore the SIGTERM signal
-                // and not exit.
-                // Note: SVC_CONSOLE actually means "requires console" but
-                // it is only used by the shell.
-                if (!s->IsShutdownCritical() && s->pid() != 0 && (s->flags() & SVC_CONSOLE) == 0) {
-                    service_count++;
-                }
-            }
-
-            if (service_count == 0) {
-                // All terminable services terminated. We can exit early.
-                break;
-            }
-
-            // Wait a bit before recounting the number or running services.
-            std::this_thread::sleep_for(50ms);
-        }
-        LOG(INFO) << "Terminating running services took " << t
-                  << " with remaining services:" << service_count;
+        StopServicesAndLogViolations(stop_first, shutdown_timeout / 2, true /* SIGTERM */);
     }
-
-    // minimum safety steps before restarting
-    // 2. kill all services except ones that are necessary for the shutdown sequence.
-    for (const auto& s : ServiceList::GetInstance().services_in_shutdown_order()) {
-        if (!s->IsShutdownCritical()) s->Stop();
-    }
+    // Send SIGKILL to ones that didn't terminate cleanly.
+    StopServicesAndLogViolations(stop_first, 0ms, false /* SIGKILL */);
     SubcontextTerminate();
+    // Reap subcontext pids.
     ReapAnyOutstandingChildren();
 
     // 3. send volume shutdown to vold
-    Service* voldService = ServiceList::GetInstance().FindService("vold");
-    if (voldService != nullptr && voldService->IsRunning()) {
-        ShutdownVold();
-        voldService->Stop();
+    Service* vold_service = ServiceList::GetInstance().FindService("vold");
+    if (vold_service != nullptr && vold_service->IsRunning()) {
+        CallVdc("volume", "shutdown");
+        vold_service->Stop();
     } else {
         LOG(INFO) << "vold not running, skipping vold shutdown";
     }
     // logcat stopped here
-    for (const auto& s : ServiceList::GetInstance().services_in_shutdown_order()) {
-        if (kill_after_apps.count(s->name())) s->Stop();
-    }
+    StopServices(GetDebuggingServices(false /* only_post_data */), 0ms, false /* SIGKILL */);
     // 4. sync, try umount, and optionally run fsck for user shutdown
     {
         Timer sync_timer;
@@ -608,8 +674,8 @@
     // 5. drop caches and disable zram backing device, if exist
     KillZramBackingDevice();
 
-    UmountStat stat = TryUmountAndFsck(cmd, rebootTarget, runFsck, shutdown_timeout - t.duration(),
-                                       &reboot_semaphore);
+    UmountStat stat =
+            TryUmountAndFsck(cmd, run_fsck, shutdown_timeout - t.duration(), &reboot_semaphore);
     // Follow what linux shutdown is doing: one more sync with little bit delay
     {
         Timer sync_timer;
@@ -625,16 +691,178 @@
     sem_post(&reboot_semaphore);
 
     // Reboot regardless of umount status. If umount fails, fsck after reboot will fix it.
-    RebootSystem(cmd, rebootTarget);
+    RebootSystem(cmd, reboot_target);
     abort();
 }
 
-bool HandlePowerctlMessage(const std::string& command) {
+static void EnterShutdown() {
+    LOG(INFO) << "Entering shutdown mode";
+    shutting_down = true;
+    // Skip wait for prop if it is in progress
+    ResetWaitForProp();
+    // Clear EXEC flag if there is one pending
+    for (const auto& s : ServiceList::GetInstance()) {
+        s->UnSetExec();
+    }
+    // We no longer process messages about properties changing coming from property service, so we
+    // need to tell property service to stop sending us these messages, otherwise it'll fill the
+    // buffers and block indefinitely, causing future property sets, including those that init makes
+    // during shutdown in Service::NotifyStateChange() to also block indefinitely.
+    SendStopSendingMessagesMessage();
+}
+
+static void LeaveShutdown() {
+    LOG(INFO) << "Leaving shutdown mode";
+    shutting_down = false;
+    SendStartSendingMessagesMessage();
+}
+
+static Result<void> UnmountAllApexes() {
+    const char* args[] = {"/system/bin/apexd", "--unmount-all"};
+    int status;
+    if (logwrap_fork_execvp(arraysize(args), args, &status, false, LOG_KLOG, true, nullptr) != 0) {
+        return ErrnoError() << "Failed to call '/system/bin/apexd --unmount-all'";
+    }
+    if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
+        return {};
+    }
+    return Error() << "'/system/bin/apexd --unmount-all' failed : " << status;
+}
+
+static Result<void> DoUserspaceReboot() {
+    LOG(INFO) << "Userspace reboot initiated";
+    boot_clock::time_point now = boot_clock::now();
+    SetProperty("sys.init.userspace_reboot.last_started",
+                std::to_string(now.time_since_epoch().count()));
+    auto guard = android::base::make_scope_guard([] {
+        // Leave shutdown so that we can handle a full reboot.
+        LeaveShutdown();
+        trigger_shutdown("reboot,abort-userspace-reboot");
+    });
+    // Triggering userspace-reboot-requested will result in a bunch of setprop
+    // actions. We should make sure, that all of them are propagated before
+    // proceeding with userspace reboot. Synchronously setting kUserspaceRebootInProgress property
+    // is not perfect, but it should do the trick.
+    if (!android::sysprop::InitProperties::userspace_reboot_in_progress(true)) {
+        return Error() << "Failed to set sys.init.userspace_reboot.in_progress property";
+    }
+    EnterShutdown();
+    std::vector<Service*> stop_first;
+    // Remember the services that were enabled. We will need to manually enable them again otherwise
+    // triggers like class_start won't restart them.
+    std::vector<Service*> were_enabled;
+    stop_first.reserve(ServiceList::GetInstance().services().size());
+    for (const auto& s : ServiceList::GetInstance().services_in_shutdown_order()) {
+        if (s->is_post_data() && !kDebuggingServices.count(s->name())) {
+            stop_first.push_back(s);
+        }
+        if (s->is_post_data() && s->IsEnabled()) {
+            were_enabled.push_back(s);
+        }
+    }
+    {
+        Timer sync_timer;
+        LOG(INFO) << "sync() before terminating services...";
+        sync();
+        LOG(INFO) << "sync() took " << sync_timer;
+    }
+    // TODO(b/135984674): do we need shutdown animation for userspace reboot?
+    // TODO(b/135984674): control userspace timeout via read-only property?
+    StopServicesAndLogViolations(stop_first, 10s, true /* SIGTERM */);
+    if (int r = StopServicesAndLogViolations(stop_first, 20s, false /* SIGKILL */); r > 0) {
+        // TODO(b/135984674): store information about offending services for debugging.
+        return Error() << r << " post-data services are still running";
+    }
+    if (auto result = KillZramBackingDevice(); !result) {
+        return result;
+    }
+    if (auto result = CallVdc("volume", "reset"); !result) {
+        return result;
+    }
+    if (int r = StopServicesAndLogViolations(GetDebuggingServices(true /* only_post_data */), 5s,
+                                             false /* SIGKILL */);
+        r > 0) {
+        // TODO(b/135984674): store information about offending services for debugging.
+        return Error() << r << " debugging services are still running";
+    }
+    {
+        Timer sync_timer;
+        LOG(INFO) << "sync() after stopping services...";
+        sync();
+        LOG(INFO) << "sync() took " << sync_timer;
+    }
+    if (auto result = UnmountAllApexes(); !result) {
+        return result;
+    }
+    if (!SwitchToBootstrapMountNamespaceIfNeeded()) {
+        return Error() << "Failed to switch to bootstrap namespace";
+    }
+    // Remove services that were defined in an APEX.
+    ServiceList::GetInstance().RemoveServiceIf([](const std::unique_ptr<Service>& s) -> bool {
+        if (s->is_from_apex()) {
+            LOG(INFO) << "Removing service '" << s->name() << "' because it's defined in an APEX";
+            return true;
+        }
+        return false;
+    });
+    // Re-enable services
+    for (const auto& s : were_enabled) {
+        LOG(INFO) << "Re-enabling service '" << s->name() << "'";
+        s->Enable();
+    }
+    LeaveShutdown();
+    ActionManager::GetInstance().QueueEventTrigger("userspace-reboot-resume");
+    guard.Disable();  // Go on with userspace reboot.
+    return {};
+}
+
+static void UserspaceRebootWatchdogThread() {
+    if (!WaitForProperty("sys.init.userspace_reboot.in_progress", "1", 20s)) {
+        // TODO(b/135984674): should we reboot instead?
+        LOG(WARNING) << "Userspace reboot didn't start in 20 seconds. Stopping watchdog";
+        return;
+    }
+    LOG(INFO) << "Starting userspace reboot watchdog";
+    // TODO(b/135984674): this should be configured via a read-only sysprop.
+    std::chrono::milliseconds timeout = 60s;
+    if (!WaitForProperty("sys.boot_completed", "1", timeout)) {
+        LOG(ERROR) << "Failed to boot in " << timeout.count() << "ms. Switching to full reboot";
+        // In this case device is in a boot loop. Only way to recover is to do dirty reboot.
+        RebootSystem(ANDROID_RB_RESTART2, "userspace-reboot-watchdog-triggered");
+    }
+    LOG(INFO) << "Device booted, stopping userspace reboot watchdog";
+}
+
+static void HandleUserspaceReboot() {
+    // Spinnig up a separate thread will fail the setns call later in the boot sequence.
+    // Fork a new process to monitor userspace reboot while we are investigating a better solution.
+    pid_t pid = fork();
+    if (pid < 0) {
+        PLOG(ERROR) << "Failed to fork process for userspace reboot watchdog. Switching to full "
+                    << "reboot";
+        trigger_shutdown("reboot,userspace-reboot-failed-to-fork");
+        return;
+    }
+    if (pid == 0) {
+        // Child
+        UserspaceRebootWatchdogThread();
+        _exit(EXIT_SUCCESS);
+    }
+    LOG(INFO) << "Clearing queue and starting userspace-reboot-requested trigger";
+    auto& am = ActionManager::GetInstance();
+    am.ClearQueue();
+    am.QueueEventTrigger("userspace-reboot-requested");
+    auto handler = [](const BuiltinArguments&) { return DoUserspaceReboot(); };
+    am.QueueBuiltinAction(handler, "userspace-reboot");
+}
+
+void HandlePowerctlMessage(const std::string& command) {
     unsigned int cmd = 0;
     std::vector<std::string> cmd_params = Split(command, ",");
     std::string reboot_target = "";
     bool run_fsck = false;
     bool command_invalid = false;
+    bool userspace_reboot = false;
 
     if (cmd_params[0] == "shutdown") {
         cmd = ANDROID_RB_POWEROFF;
@@ -654,6 +882,10 @@
         cmd = ANDROID_RB_RESTART2;
         if (cmd_params.size() >= 2) {
             reboot_target = cmd_params[1];
+            if (reboot_target == "userspace") {
+                LOG(INFO) << "Userspace reboot requested";
+                userspace_reboot = true;
+            }
             // adb reboot fastboot should boot into bootloader for devices not
             // supporting logical partitions.
             if (reboot_target == "fastboot" &&
@@ -680,7 +912,7 @@
                     strlcpy(boot.command, "boot-recovery", sizeof(boot.command));
                     if (std::string err; !write_bootloader_message(boot, &err)) {
                         LOG(ERROR) << "Failed to set bootloader message: " << err;
-                        return false;
+                        return;
                     }
                 }
             } else if (reboot_target == "sideload" || reboot_target == "sideload-auto-reboot" ||
@@ -693,7 +925,7 @@
                 std::string err;
                 if (!write_bootloader_message(options, &err)) {
                     LOG(ERROR) << "Failed to set bootloader message: " << err;
-                    return false;
+                    return;
                 }
                 reboot_target = "recovery";
             }
@@ -708,7 +940,12 @@
     }
     if (command_invalid) {
         LOG(ERROR) << "powerctl: unrecognized command '" << command << "'";
-        return false;
+        return;
+    }
+
+    if (userspace_reboot) {
+        HandleUserspaceReboot();
+        return;
     }
 
     LOG(INFO) << "Clear action queue and start shutdown trigger";
@@ -722,15 +959,11 @@
     };
     ActionManager::GetInstance().QueueBuiltinAction(shutdown_handler, "shutdown_done");
 
-    // Skip wait for prop if it is in progress
-    ResetWaitForProp();
+    EnterShutdown();
+}
 
-    // Clear EXEC flag if there is one pending
-    for (const auto& s : ServiceList::GetInstance()) {
-        s->UnSetExec();
-    }
-
-    return true;
+bool IsShuttingDown() {
+    return shutting_down;
 }
 
 }  // namespace init
diff --git a/init/reboot.h b/init/reboot.h
index 07dcb6e..81c3edc 100644
--- a/init/reboot.h
+++ b/init/reboot.h
@@ -23,8 +23,9 @@
 namespace init {
 
 // Parses and handles a setprop sys.powerctl message.
-bool HandlePowerctlMessage(const std::string& command);
+void HandlePowerctlMessage(const std::string& command);
 
+bool IsShuttingDown();
 }  // namespace init
 }  // namespace android
 
diff --git a/init/reboot_utils.cpp b/init/reboot_utils.cpp
index d1a712f..dac0cf4 100644
--- a/init/reboot_utils.cpp
+++ b/init/reboot_utils.cpp
@@ -21,11 +21,12 @@
 
 #include <string>
 
-#include "android-base/file.h"
-#include "android-base/logging.h"
-#include "android-base/strings.h"
-#include "backtrace/Backtrace.h"
-#include "cutils/android_reboot.h"
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android-base/strings.h>
+#include <backtrace/Backtrace.h>
+#include <cutils/android_reboot.h>
 
 #include "capabilities.h"
 
@@ -93,7 +94,14 @@
             break;
 
         case ANDROID_RB_THERMOFF:
-            reboot(RB_POWER_OFF);
+            if (android::base::GetBoolProperty("ro.thermal_warmreset", false)) {
+                LOG(INFO) << "Try to trigger a warm reset for thermal shutdown";
+                static constexpr const char kThermalShutdownTarget[] = "shutdown,thermal";
+                syscall(__NR_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2,
+                        LINUX_REBOOT_CMD_RESTART2, kThermalShutdownTarget);
+            } else {
+                reboot(RB_POWER_OFF);
+            }
             break;
     }
     // In normal case, reboot should not return.
@@ -101,7 +109,7 @@
     abort();
 }
 
-void __attribute__((noreturn)) InitFatalReboot() {
+void __attribute__((noreturn)) InitFatalReboot(int signal_number) {
     auto pid = fork();
 
     if (pid == -1) {
@@ -116,6 +124,7 @@
     }
 
     // In the parent, let's try to get a backtrace then shutdown.
+    LOG(ERROR) << __FUNCTION__ << ": signal " << signal_number;
     std::unique_ptr<Backtrace> backtrace(
             Backtrace::Create(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD));
     if (!backtrace->Unwind(0)) {
@@ -146,7 +155,7 @@
         // RebootSystem uses syscall() which isn't actually async-signal-safe, but our only option
         // and probably good enough given this is already an error case and only enabled for
         // development builds.
-        InitFatalReboot();
+        InitFatalReboot(signal);
     };
     action.sa_flags = SA_RESTART;
     sigaction(SIGABRT, &action, nullptr);
diff --git a/init/reboot_utils.h b/init/reboot_utils.h
index 3fd969e..878ad96 100644
--- a/init/reboot_utils.h
+++ b/init/reboot_utils.h
@@ -27,7 +27,7 @@
 bool IsRebootCapable();
 // This is a wrapper around the actual reboot calls.
 void __attribute__((noreturn)) RebootSystem(unsigned int cmd, const std::string& reboot_target);
-void __attribute__((noreturn)) InitFatalReboot();
+void __attribute__((noreturn)) InitFatalReboot(int signal_number);
 void InstallRebootSignalHandlers();
 
 }  // namespace init
diff --git a/init/selinux.cpp b/init/selinux.cpp
index 143cdfd..852d6ca 100644
--- a/init/selinux.cpp
+++ b/init/selinux.cpp
@@ -36,21 +36,25 @@
 // The split SEPolicy is loaded as described below:
 // 1) There is a precompiled SEPolicy located at either /vendor/etc/selinux/precompiled_sepolicy or
 //    /odm/etc/selinux/precompiled_sepolicy if odm parition is present.  Stored along with this file
-//    are the sha256 hashes of the parts of the SEPolicy on /system and /product that were used to
-//    compile this precompiled policy.  The system partition contains a similar sha256 of the parts
-//    of the SEPolicy that it currently contains.  Symmetrically, product paritition contains a
-//    sha256 of its SEPolicy.  System loads this precompiled_sepolicy directly if and only if hashes
-//    for system policy match and hashes for product policy match.
-// 2) If these hashes do not match, then either /system or /product (or both) have been updated out
-//    of sync with /vendor and the init needs to compile the SEPolicy.  /system contains the
-//    SEPolicy compiler, secilc, and it is used by the LoadSplitPolicy() function below to compile
-//    the SEPolicy to a temp directory and load it.  That function contains even more documentation
-//    with the specific implementation details of how the SEPolicy is compiled if needed.
+//    are the sha256 hashes of the parts of the SEPolicy on /system, /system_ext and /product that
+//    were used to compile this precompiled policy.  The system partition contains a similar sha256
+//    of the parts of the SEPolicy that it currently contains.  Symmetrically, system_ext and
+//    product paritition contain sha256 hashes of their SEPolicy.  The init loads this
+//    precompiled_sepolicy directly if and only if the hashes along with the precompiled SEPolicy on
+//    /vendor or /odm match the hashes for system, system_ext and product SEPolicy, respectively.
+// 2) If these hashes do not match, then either /system or /system_ext or /product (or some of them)
+//    have been updated out of sync with /vendor (or /odm if it is present) and the init needs to
+//    compile the SEPolicy.  /system contains the SEPolicy compiler, secilc, and it is used by the
+//    LoadSplitPolicy() function below to compile the SEPolicy to a temp directory and load it.
+//    That function contains even more documentation with the specific implementation details of how
+//    the SEPolicy is compiled if needed.
 
 #include "selinux.h"
 
 #include <android/api-level.h>
 #include <fcntl.h>
+#include <linux/audit.h>
+#include <linux/netlink.h>
 #include <stdlib.h>
 #include <sys/wait.h>
 #include <unistd.h>
@@ -84,12 +88,11 @@
 EnforcingStatus StatusFromCmdline() {
     EnforcingStatus status = SELINUX_ENFORCING;
 
-    import_kernel_cmdline(false,
-                          [&](const std::string& key, const std::string& value, bool in_qemu) {
-                              if (key == "androidboot.selinux" && value == "permissive") {
-                                  status = SELINUX_PERMISSIVE;
-                              }
-                          });
+    ImportKernelCmdline([&](const std::string& key, const std::string& value) {
+        if (key == "androidboot.selinux" && value == "permissive") {
+            status = SELINUX_PERMISSIVE;
+        }
+    });
 
     return status;
 }
@@ -226,6 +229,13 @@
                       "/system/etc/selinux/plat_sepolicy_and_mapping.sha256";
         return false;
     }
+    std::string actual_system_ext_id;
+    if (!ReadFirstLine("/system_ext/etc/selinux/system_ext_sepolicy_and_mapping.sha256",
+                       &actual_system_ext_id)) {
+        PLOG(INFO) << "Failed to read "
+                      "/system_ext/etc/selinux/system_ext_sepolicy_and_mapping.sha256";
+        return false;
+    }
     std::string actual_product_id;
     if (!ReadFirstLine("/product/etc/selinux/product_sepolicy_and_mapping.sha256",
                        &actual_product_id)) {
@@ -241,6 +251,13 @@
         file->clear();
         return false;
     }
+    std::string precompiled_system_ext_id;
+    std::string precompiled_system_ext_sha256 = *file + ".system_ext_sepolicy_and_mapping.sha256";
+    if (!ReadFirstLine(precompiled_system_ext_sha256.c_str(), &precompiled_system_ext_id)) {
+        PLOG(INFO) << "Failed to read " << precompiled_system_ext_sha256;
+        file->clear();
+        return false;
+    }
     std::string precompiled_product_id;
     std::string precompiled_product_sha256 = *file + ".product_sepolicy_and_mapping.sha256";
     if (!ReadFirstLine(precompiled_product_sha256.c_str(), &precompiled_product_id)) {
@@ -249,6 +266,7 @@
         return false;
     }
     if (actual_plat_id.empty() || actual_plat_id != precompiled_plat_id ||
+        actual_system_ext_id.empty() || actual_system_ext_id != precompiled_system_ext_id ||
         actual_product_id.empty() || actual_product_id != precompiled_product_id) {
         file->clear();
         return false;
@@ -334,6 +352,17 @@
         plat_compat_cil_file.clear();
     }
 
+    std::string system_ext_policy_cil_file("/system_ext/etc/selinux/system_ext_sepolicy.cil");
+    if (access(system_ext_policy_cil_file.c_str(), F_OK) == -1) {
+        system_ext_policy_cil_file.clear();
+    }
+
+    std::string system_ext_mapping_file("/system_ext/etc/selinux/mapping/" + vend_plat_vers +
+                                        ".cil");
+    if (access(system_ext_mapping_file.c_str(), F_OK) == -1) {
+        system_ext_mapping_file.clear();
+    }
+
     std::string product_policy_cil_file("/product/etc/selinux/product_sepolicy.cil");
     if (access(product_policy_cil_file.c_str(), F_OK) == -1) {
         product_policy_cil_file.clear();
@@ -382,6 +411,12 @@
     if (!plat_compat_cil_file.empty()) {
         compile_args.push_back(plat_compat_cil_file.c_str());
     }
+    if (!system_ext_policy_cil_file.empty()) {
+        compile_args.push_back(system_ext_policy_cil_file.c_str());
+    }
+    if (!system_ext_mapping_file.empty()) {
+        compile_args.push_back(system_ext_mapping_file.c_str());
+    }
     if (!product_policy_cil_file.empty()) {
         compile_args.push_back(product_policy_cil_file.c_str());
     }
@@ -437,7 +472,8 @@
     bool is_enforcing = IsEnforcing();
     if (kernel_enforcing != is_enforcing) {
         if (security_setenforce(is_enforcing)) {
-            PLOG(FATAL) << "security_setenforce(%s) failed" << (is_enforcing ? "true" : "false");
+            PLOG(FATAL) << "security_setenforce(" << (is_enforcing ? "true" : "false")
+                        << ") failed";
         }
     }
 
@@ -446,11 +482,37 @@
     }
 }
 
+constexpr size_t kKlogMessageSize = 1024;
+
+void SelinuxAvcLog(char* buf, size_t buf_len) {
+    CHECK_GT(buf_len, 0u);
+
+    size_t str_len = strnlen(buf, buf_len);
+    // trim newline at end of string
+    if (buf[str_len - 1] == '\n') {
+        buf[str_len - 1] = '\0';
+    }
+
+    struct NetlinkMessage {
+        nlmsghdr hdr;
+        char buf[kKlogMessageSize];
+    } request = {};
+
+    request.hdr.nlmsg_flags = NLM_F_REQUEST;
+    request.hdr.nlmsg_type = AUDIT_USER_AVC;
+    request.hdr.nlmsg_len = sizeof(request);
+    strlcpy(request.buf, buf, sizeof(request.buf));
+
+    auto fd = unique_fd{socket(PF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_AUDIT)};
+    if (!fd.ok()) {
+        return;
+    }
+
+    TEMP_FAILURE_RETRY(send(fd, &request, sizeof(request), 0));
+}
+
 }  // namespace
 
-// The files and directories that were created before initial sepolicy load or
-// files on ramdisk need to have their security context restored to the proper
-// value. This must happen before /dev is populated by ueventd.
 void SelinuxRestoreContext() {
     LOG(INFO) << "Running restorecon...";
     selinux_android_restorecon("/dev", 0);
@@ -469,6 +531,8 @@
     selinux_android_restorecon("/dev/device-mapper", 0);
 
     selinux_android_restorecon("/apex", 0);
+
+    selinux_android_restorecon("/linkerconfig", 0);
 }
 
 int SelinuxKlogCallback(int type, const char* fmt, ...) {
@@ -478,24 +542,28 @@
     } else if (type == SELINUX_INFO) {
         severity = android::base::INFO;
     }
-    char buf[1024];
+    char buf[kKlogMessageSize];
     va_list ap;
     va_start(ap, fmt);
-    vsnprintf(buf, sizeof(buf), fmt, ap);
+    int length_written = vsnprintf(buf, sizeof(buf), fmt, ap);
     va_end(ap);
-    android::base::KernelLogger(android::base::MAIN, severity, "selinux", nullptr, 0, buf);
+    if (length_written <= 0) {
+        return 0;
+    }
+    if (type == SELINUX_AVC) {
+        SelinuxAvcLog(buf, sizeof(buf));
+    } else {
+        android::base::KernelLogger(android::base::MAIN, severity, "selinux", nullptr, 0, buf);
+    }
     return 0;
 }
 
-// This function sets up SELinux logging to be written to kmsg, to match init's logging.
 void SelinuxSetupKernelLogging() {
     selinux_callback cb;
     cb.func_log = SelinuxKlogCallback;
     selinux_set_callback(SELINUX_CB_LOG, cb);
 }
 
-// This function returns the Android version with which the vendor SEPolicy was compiled.
-// It is used for version checks such as whether or not vendor_init should be used
 int SelinuxGetVendorAndroidVersion() {
     static int vendor_android_version = [] {
         if (!IsSplitPolicyDevice()) {
@@ -521,8 +589,8 @@
     return vendor_android_version;
 }
 
-// This function initializes SELinux then execs init to run in the init SELinux context.
 int SetupSelinux(char** argv) {
+    SetStdioToDevNull(argv);
     InitKernelLogging(argv);
 
     if (REBOOT_BOOTLOADER_ON_PANIC) {
diff --git a/init/selinux.h b/init/selinux.h
index 63ad470..1a41bfd 100644
--- a/init/selinux.h
+++ b/init/selinux.h
@@ -19,10 +19,19 @@
 namespace android {
 namespace init {
 
+// Initialize SELinux, then exec init to run in the init SELinux context.
 int SetupSelinux(char** argv);
+
+// Restore the proper security context to files and directories on ramdisk, and
+// those that were created before initial sepolicy load.
+// This must happen before /dev is populated by ueventd.
 void SelinuxRestoreContext();
 
+// Set up SELinux logging to be written to kmsg, to match init's logging.
 void SelinuxSetupKernelLogging();
+
+// Return the Android API level with which the vendor SEPolicy was compiled.
+// Used for version checks such as whether or not vendor_init should be used.
 int SelinuxGetVendorAndroidVersion();
 
 static constexpr char kEnvSelinuxStartedAt[] = "SELINUX_STARTED_AT";
diff --git a/init/service.cpp b/init/service.cpp
index 9537843..a97935e 100644
--- a/init/service.cpp
+++ b/init/service.cpp
@@ -29,20 +29,23 @@
 #include <android-base/file.h>
 #include <android-base/logging.h>
 #include <android-base/properties.h>
+#include <android-base/scopeguard.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <cutils/sockets.h>
 #include <processgroup/processgroup.h>
 #include <selinux/selinux.h>
 
+#include "lmkd_service.h"
 #include "service_list.h"
 #include "util.h"
 
 #if defined(__ANDROID__)
 #include <ApexProperties.sysprop.h>
+#include <android/api-level.h>
 
 #include "mount_namespace.h"
-#include "property_service.h"
+#include "selinux.h"
 #else
 #include "host_init_stubs.h"
 #endif
@@ -50,6 +53,8 @@
 using android::base::boot_clock;
 using android::base::GetProperty;
 using android::base::Join;
+using android::base::make_scope_guard;
+using android::base::SetProperty;
 using android::base::StartsWith;
 using android::base::StringPrintf;
 using android::base::WriteStringToFile;
@@ -116,22 +121,23 @@
     return execv(c_strings[0], c_strings.data()) == 0;
 }
 
-static bool IsRuntimeApexReady() {
+static bool AreRuntimeApexesReady() {
     struct stat buf;
-    return stat("/apex/com.android.runtime/", &buf) == 0;
+    return stat("/apex/com.android.art/", &buf) == 0 &&
+           stat("/apex/com.android.runtime/", &buf) == 0;
 }
 
 unsigned long Service::next_start_order_ = 1;
 bool Service::is_exec_service_running_ = false;
 
 Service::Service(const std::string& name, Subcontext* subcontext_for_restart_commands,
-                 const std::vector<std::string>& args)
-    : Service(name, 0, 0, 0, {}, 0, "", subcontext_for_restart_commands, args) {}
+                 const std::vector<std::string>& args, bool from_apex)
+    : Service(name, 0, 0, 0, {}, 0, "", subcontext_for_restart_commands, args, from_apex) {}
 
 Service::Service(const std::string& name, unsigned flags, uid_t uid, gid_t gid,
                  const std::vector<gid_t>& supp_gids, int namespace_flags,
                  const std::string& seclabel, Subcontext* subcontext_for_restart_commands,
-                 const std::vector<std::string>& args)
+                 const std::vector<std::string>& args, bool from_apex)
     : name_(name),
       classnames_({"default"}),
       flags_(flags),
@@ -147,9 +153,10 @@
       seclabel_(seclabel),
       onrestart_(false, subcontext_for_restart_commands, "<Service '" + name + "' onrestart>", 0,
                  "onrestart", {}),
-      oom_score_adjust_(-1000),
+      oom_score_adjust_(DEFAULT_OOM_SCORE_ADJUST),
       start_order_(0),
-      args_(args) {}
+      args_(args),
+      from_apex_(from_apex) {}
 
 void Service::NotifyStateChange(const std::string& new_state) const {
     if ((flags_ & SVC_TEMPORARY) != 0) {
@@ -158,13 +165,13 @@
     }
 
     std::string prop_name = "init.svc." + name_;
-    property_set(prop_name, new_state);
+    SetProperty(prop_name, new_state);
 
     if (new_state == "running") {
         uint64_t start_ns = time_started_.time_since_epoch().count();
         std::string boottime_property = "ro.boottime." + name_;
         if (GetProperty(boottime_property, "").empty()) {
-            property_set(boottime_property, std::to_string(start_ns));
+            SetProperty(boottime_property, std::to_string(start_ns));
         }
     }
 
@@ -172,13 +179,13 @@
     // on device for security checks.
     std::string pid_property = "init.svc_debug_pid." + name_;
     if (new_state == "running") {
-        property_set(pid_property, std::to_string(pid_));
+        SetProperty(pid_property, std::to_string(pid_));
     } else if (new_state == "stopped") {
-        property_set(pid_property, "");
+        SetProperty(pid_property, "");
     }
 }
 
-void Service::KillProcessGroup(int signal) {
+void Service::KillProcessGroup(int signal, bool report_oneshot) {
     // If we've already seen a successful result from killProcessGroup*(), then we have removed
     // the cgroup already and calling these functions a second time will simply result in an error.
     // This is true regardless of which signal was sent.
@@ -186,15 +193,28 @@
     if (!process_cgroup_empty_) {
         LOG(INFO) << "Sending signal " << signal << " to service '" << name_ << "' (pid " << pid_
                   << ") process group...";
+        int max_processes = 0;
         int r;
         if (signal == SIGTERM) {
-            r = killProcessGroupOnce(proc_attr_.uid, pid_, signal);
+            r = killProcessGroupOnce(proc_attr_.uid, pid_, signal, &max_processes);
         } else {
-            r = killProcessGroup(proc_attr_.uid, pid_, signal);
+            r = killProcessGroup(proc_attr_.uid, pid_, signal, &max_processes);
+        }
+
+        if (report_oneshot && max_processes > 0) {
+            LOG(WARNING)
+                    << "Killed " << max_processes
+                    << " additional processes from a oneshot process group for service '" << name_
+                    << "'. This is new behavior, previously child processes would not be killed in "
+                       "this case.";
         }
 
         if (r == 0) process_cgroup_empty_ = true;
     }
+
+    if (oom_score_adjust_ != DEFAULT_OOM_SCORE_ADJUST) {
+        LmkdUnregister(name_, pid_);
+    }
 }
 
 void Service::SetProcessAttributesAndCaps() {
@@ -236,7 +256,16 @@
 
 void Service::Reap(const siginfo_t& siginfo) {
     if (!(flags_ & SVC_ONESHOT) || (flags_ & SVC_RESTART)) {
-        KillProcessGroup(SIGKILL);
+        KillProcessGroup(SIGKILL, false);
+    } else {
+        // Legacy behavior from ~2007 until Android R: this else branch did not exist and we did not
+        // kill the process group in this case.
+        if (SelinuxGetVendorAndroidVersion() >= __ANDROID_API_R__) {
+            // The new behavior in Android R is to kill these process groups in all cases.  The
+            // 'true' parameter instructions KillProcessGroup() to report a warning message where it
+            // detects a difference in behavior has occurred.
+            KillProcessGroup(SIGKILL, true);
+        }
     }
 
     // Remove any socket resources we may have created.
@@ -249,6 +278,11 @@
         f(siginfo);
     }
 
+    if ((siginfo.si_code != CLD_EXITED || siginfo.si_status != 0) && on_failure_reboot_target_) {
+        LOG(ERROR) << "Service with 'reboot_on_failure' option failed, shutting down system.";
+        trigger_shutdown(*on_failure_reboot_target_);
+    }
+
     if (flags_ & SVC_EXEC) UnSetExec();
 
     if (flags_ & SVC_TEMPORARY) return;
@@ -291,7 +325,8 @@
                     LOG(ERROR) << "updatable process '" << name_ << "' exited 4 times "
                                << (boot_completed ? "in 4 minutes" : "before boot completed");
                     // Notifies update_verifier and apexd
-                    property_set("ro.init.updatable_crashing", "1");
+                    SetProperty("sys.init.updatable_crashing", "1");
+                    SetProperty("sys.init.updatable_crashing_process_name", name_);
                 }
             }
         } else {
@@ -324,6 +359,12 @@
 
 
 Result<void> Service::ExecStart() {
+    auto reboot_on_failure = make_scope_guard([this] {
+        if (on_failure_reboot_target_) {
+            trigger_shutdown(*on_failure_reboot_target_);
+        }
+    });
+
     if (is_updatable() && !ServiceList::GetInstance().IsServicesUpdated()) {
         // Don't delay the service for ExecStart() as the semantic is that
         // the caller might depend on the side effect of the execution.
@@ -344,10 +385,17 @@
               << " gid " << proc_attr_.gid << "+" << proc_attr_.supp_gids.size() << " context "
               << (!seclabel_.empty() ? seclabel_ : "default") << ") started; waiting...";
 
+    reboot_on_failure.Disable();
     return {};
 }
 
 Result<void> Service::Start() {
+    auto reboot_on_failure = make_scope_guard([this] {
+        if (on_failure_reboot_target_) {
+            trigger_shutdown(*on_failure_reboot_target_);
+        }
+    });
+
     if (is_updatable() && !ServiceList::GetInstance().IsServicesUpdated()) {
         ServiceList::GetInstance().DelayService(*this);
         return Error() << "Cannot start an updatable service '" << name_
@@ -370,6 +418,7 @@
             flags_ |= SVC_RESTART;
         }
         // It is not an error to try to start a service that is already running.
+        reboot_on_failure.Disable();
         return {};
     }
 
@@ -406,11 +455,11 @@
         scon = *result;
     }
 
-    if (!IsRuntimeApexReady() && !pre_apexd_) {
-        // If this service is started before the runtime APEX gets available,
-        // mark it as pre-apexd one. Note that this marking is permanent. So
-        // for example, if the service is re-launched (e.g., due to crash),
-        // it is still recognized as pre-apexd... for consistency.
+    if (!AreRuntimeApexesReady() && !pre_apexd_) {
+        // If this service is started before the Runtime and ART APEXes get
+        // available, mark it as pre-apexd one. Note that this marking is
+        // permanent. So for example, if the service is re-launched (e.g., due
+        // to crash), it is still recognized as pre-apexd... for consistency.
         pre_apexd_ = true;
     }
 
@@ -418,6 +467,23 @@
 
     LOG(INFO) << "starting service '" << name_ << "'...";
 
+    std::vector<Descriptor> descriptors;
+    for (const auto& socket : sockets_) {
+        if (auto result = socket.Create(scon)) {
+            descriptors.emplace_back(std::move(*result));
+        } else {
+            LOG(INFO) << "Could not create socket '" << socket.name << "': " << result.error();
+        }
+    }
+
+    for (const auto& file : files_) {
+        if (auto result = file.Create()) {
+            descriptors.emplace_back(std::move(*result));
+        } else {
+            LOG(INFO) << "Could not open file '" << file.name << "': " << result.error();
+        }
+    }
+
     pid_t pid = -1;
     if (namespaces_.flags) {
         pid = clone(nullptr, nullptr, namespaces_.flags | SIGCHLD, nullptr);
@@ -437,16 +503,8 @@
             setenv(key.c_str(), value.c_str(), 1);
         }
 
-        for (const auto& socket : sockets_) {
-            if (auto result = socket.CreateAndPublish(scon); !result) {
-                LOG(INFO) << "Could not create socket '" << socket.name << "': " << result.error();
-            }
-        }
-
-        for (const auto& file : files_) {
-            if (auto result = file.CreateAndPublish(); !result) {
-                LOG(INFO) << "Could not open file '" << file.name << "': " << result.error();
-            }
+        for (const auto& descriptor : descriptors) {
+            descriptor.Publish();
         }
 
         if (auto result = WritePidToFiles(&writepid_files_); !result) {
@@ -458,7 +516,8 @@
         SetProcessAttributesAndCaps();
 
         if (!ExpandArgsAndExecv(args_, sigstop_)) {
-            PLOG(ERROR) << "cannot execve('" << args_[0] << "')";
+            PLOG(ERROR) << "cannot execv('" << args_[0]
+                        << "'). See the 'Debugging init' section of init's README.md for tips";
         }
 
         _exit(127);
@@ -469,7 +528,7 @@
         return ErrnoError() << "Failed to fork";
     }
 
-    if (oom_score_adjust_ != -1000) {
+    if (oom_score_adjust_ != DEFAULT_OOM_SCORE_ADJUST) {
         std::string oom_str = std::to_string(oom_score_adjust_);
         std::string oom_file = StringPrintf("/proc/%d/oom_score_adj", pid);
         if (!WriteStringToFile(oom_str, oom_file)) {
@@ -530,7 +589,12 @@
         }
     }
 
+    if (oom_score_adjust_ != DEFAULT_OOM_SCORE_ADJUST) {
+        LmkdRegister(name_, proc_attr_.uid, pid_, oom_score_adjust_);
+    }
+
     NotifyStateChange("running");
+    reboot_on_failure.Disable();
     return {};
 }
 
@@ -701,7 +765,7 @@
     }
 
     return std::make_unique<Service>(name, flags, *uid, *gid, supp_gids, namespace_flags, seclabel,
-                                     nullptr, str_args);
+                                     nullptr, str_args, false);
 }
 
 }  // namespace init
diff --git a/init/service.h b/init/service.h
index ccefc8e..cf3f0c2 100644
--- a/init/service.h
+++ b/init/service.h
@@ -65,16 +65,18 @@
 
   public:
     Service(const std::string& name, Subcontext* subcontext_for_restart_commands,
-            const std::vector<std::string>& args);
+            const std::vector<std::string>& args, bool from_apex = false);
 
     Service(const std::string& name, unsigned flags, uid_t uid, gid_t gid,
             const std::vector<gid_t>& supp_gids, int namespace_flags, const std::string& seclabel,
-            Subcontext* subcontext_for_restart_commands, const std::vector<std::string>& args);
+            Subcontext* subcontext_for_restart_commands, const std::vector<std::string>& args,
+            bool from_apex = false);
 
     static Result<std::unique_ptr<Service>> MakeTemporaryOneshotService(
             const std::vector<std::string>& args);
 
     bool IsRunning() { return (flags_ & SVC_RUNNING) != 0; }
+    bool IsEnabled() { return (flags_ & SVC_DISABLED) == 0; }
     Result<void> ExecStart();
     Result<void> Start();
     Result<void> StartIfNotDisabled();
@@ -127,11 +129,12 @@
     const std::vector<std::string>& args() const { return args_; }
     bool is_updatable() const { return updatable_; }
     bool is_post_data() const { return post_data_; }
+    bool is_from_apex() const { return from_apex_; }
 
   private:
     void NotifyStateChange(const std::string& new_state) const;
     void StopOrReset(int how);
-    void KillProcessGroup(int signal);
+    void KillProcessGroup(int signal, bool report_oneshot = false);
     void SetProcessAttributesAndCaps();
 
     static unsigned long next_start_order_;
@@ -196,6 +199,10 @@
     bool post_data_ = false;
 
     bool running_at_post_data_reset_ = false;
+
+    std::optional<std::string> on_failure_reboot_target_;
+
+    bool from_apex_ = false;
 };
 
 }  // namespace init
diff --git a/init/service_list.h b/init/service_list.h
index ee2c702..1838624 100644
--- a/init/service_list.h
+++ b/init/service_list.h
@@ -34,6 +34,11 @@
 
     void AddService(std::unique_ptr<Service> service);
     void RemoveService(const Service& svc);
+    template <class UnaryPredicate>
+    void RemoveServiceIf(UnaryPredicate predicate) {
+        services_.erase(std::remove_if(services_.begin(), services_.end(), predicate),
+                        services_.end());
+    }
 
     template <typename T, typename F = decltype(&Service::name)>
     Service* FindService(T value, F function = &Service::name) const {
diff --git a/init/service_parser.cpp b/init/service_parser.cpp
index dd552fb..1d431e3 100644
--- a/init/service_parser.cpp
+++ b/init/service_parser.cpp
@@ -29,6 +29,7 @@
 #include <hidl-util/FQName.h>
 #include <system/thread_defs.h>
 
+#include "lmkd_service.h"
 #include "rlimit_parser.h"
 #include "service_utils.h"
 #include "util.h"
@@ -83,6 +84,9 @@
 }
 
 Result<void> ServiceParser::ParseConsole(std::vector<std::string>&& args) {
+    if (service_->proc_attr_.stdio_to_kmsg) {
+        return Error() << "'console' and 'stdio_to_kmsg' are mutually exclusive";
+    }
     service_->flags_ |= SVC_CONSOLE;
     service_->proc_attr_.console = args.size() > 1 ? "/dev/" + args[1] : "";
     return {};
@@ -145,17 +149,21 @@
     const std::string& interface_name = args[1];
     const std::string& instance_name = args[2];
 
-    FQName fq_name;
-    if (!FQName::parse(interface_name, &fq_name)) {
-        return Error() << "Invalid fully-qualified name for interface '" << interface_name << "'";
-    }
+    // AIDL services don't use fully qualified names and instead just use "interface aidl <name>"
+    if (interface_name != "aidl") {
+        FQName fq_name;
+        if (!FQName::parse(interface_name, &fq_name)) {
+            return Error() << "Invalid fully-qualified name for interface '" << interface_name
+                           << "'";
+        }
 
-    if (!fq_name.isFullyQualified()) {
-        return Error() << "Interface name not fully-qualified '" << interface_name << "'";
-    }
+        if (!fq_name.isFullyQualified()) {
+            return Error() << "Interface name not fully-qualified '" << interface_name << "'";
+        }
 
-    if (fq_name.isValidValueName()) {
-        return Error() << "Interface name must not be a value name '" << interface_name << "'";
+        if (fq_name.isValidValueName()) {
+            return Error() << "Interface name must not be a value name '" << interface_name << "'";
+        }
     }
 
     const std::string fullname = interface_name + "/" + instance_name;
@@ -254,8 +262,10 @@
 }
 
 Result<void> ServiceParser::ParseOomScoreAdjust(std::vector<std::string>&& args) {
-    if (!ParseInt(args[1], &service_->oom_score_adjust_, -1000, 1000)) {
-        return Error() << "oom_score_adjust value must be in range -1000 - +1000";
+    if (!ParseInt(args[1], &service_->oom_score_adjust_, MIN_OOM_SCORE_ADJUST,
+                  MAX_OOM_SCORE_ADJUST)) {
+        return Error() << "oom_score_adjust value must be in range " << MIN_OOM_SCORE_ADJUST
+                       << " - +" << MAX_OOM_SCORE_ADJUST;
     }
     return {};
 }
@@ -306,6 +316,18 @@
     return {};
 }
 
+Result<void> ServiceParser::ParseRebootOnFailure(std::vector<std::string>&& args) {
+    if (service_->on_failure_reboot_target_) {
+        return Error() << "Only one reboot_on_failure command may be specified";
+    }
+    if (!StartsWith(args[1], "shutdown") && !StartsWith(args[1], "reboot")) {
+        return Error()
+               << "reboot_on_failure commands must begin with either 'shutdown' or 'reboot'";
+    }
+    service_->on_failure_reboot_target_ = std::move(args[1]);
+    return {};
+}
+
 Result<void> ServiceParser::ParseRestartPeriod(std::vector<std::string>&& args) {
     int period;
     if (!ParseInt(args[1], &period, 5)) {
@@ -413,6 +435,14 @@
     return {};
 }
 
+Result<void> ServiceParser::ParseStdioToKmsg(std::vector<std::string>&& args) {
+    if (service_->flags_ & SVC_CONSOLE) {
+        return Error() << "'stdio_to_kmsg' and 'console' are mutually exclusive";
+    }
+    service_->proc_attr_.stdio_to_kmsg = true;
+    return {};
+}
+
 // name type
 Result<void> ServiceParser::ParseFile(std::vector<std::string>&& args) {
     if (args[2] != "r" && args[2] != "w" && args[2] != "rw") {
@@ -467,49 +497,42 @@
     constexpr std::size_t kMax = std::numeric_limits<std::size_t>::max();
     // clang-format off
     static const KeywordMap<ServiceParser::OptionParser> parser_map = {
-        {"capabilities",
-                        {0,     kMax, &ServiceParser::ParseCapabilities}},
-        {"class",       {1,     kMax, &ServiceParser::ParseClass}},
-        {"console",     {0,     1,    &ServiceParser::ParseConsole}},
-        {"critical",    {0,     0,    &ServiceParser::ParseCritical}},
-        {"disabled",    {0,     0,    &ServiceParser::ParseDisabled}},
-        {"enter_namespace",
-                        {2,     2,    &ServiceParser::ParseEnterNamespace}},
-        {"file",        {2,     2,    &ServiceParser::ParseFile}},
-        {"group",       {1,     NR_SVC_SUPP_GIDS + 1, &ServiceParser::ParseGroup}},
-        {"interface",   {2,     2,    &ServiceParser::ParseInterface}},
-        {"ioprio",      {2,     2,    &ServiceParser::ParseIoprio}},
-        {"keycodes",    {1,     kMax, &ServiceParser::ParseKeycodes}},
-        {"memcg.limit_in_bytes",
-                        {1,     1,    &ServiceParser::ParseMemcgLimitInBytes}},
-        {"memcg.limit_percent",
-                        {1,     1,    &ServiceParser::ParseMemcgLimitPercent}},
-        {"memcg.limit_property",
-                        {1,     1,    &ServiceParser::ParseMemcgLimitProperty}},
+        {"capabilities",            {0,     kMax, &ServiceParser::ParseCapabilities}},
+        {"class",                   {1,     kMax, &ServiceParser::ParseClass}},
+        {"console",                 {0,     1,    &ServiceParser::ParseConsole}},
+        {"critical",                {0,     0,    &ServiceParser::ParseCritical}},
+        {"disabled",                {0,     0,    &ServiceParser::ParseDisabled}},
+        {"enter_namespace",         {2,     2,    &ServiceParser::ParseEnterNamespace}},
+        {"file",                    {2,     2,    &ServiceParser::ParseFile}},
+        {"group",                   {1,     NR_SVC_SUPP_GIDS + 1, &ServiceParser::ParseGroup}},
+        {"interface",               {2,     2,    &ServiceParser::ParseInterface}},
+        {"ioprio",                  {2,     2,    &ServiceParser::ParseIoprio}},
+        {"keycodes",                {1,     kMax, &ServiceParser::ParseKeycodes}},
+        {"memcg.limit_in_bytes",    {1,     1,    &ServiceParser::ParseMemcgLimitInBytes}},
+        {"memcg.limit_percent",     {1,     1,    &ServiceParser::ParseMemcgLimitPercent}},
+        {"memcg.limit_property",    {1,     1,    &ServiceParser::ParseMemcgLimitProperty}},
         {"memcg.soft_limit_in_bytes",
-                        {1,     1,    &ServiceParser::ParseMemcgSoftLimitInBytes}},
-        {"memcg.swappiness",
-                        {1,     1,    &ServiceParser::ParseMemcgSwappiness}},
-        {"namespace",   {1,     2,    &ServiceParser::ParseNamespace}},
-        {"oneshot",     {0,     0,    &ServiceParser::ParseOneshot}},
-        {"onrestart",   {1,     kMax, &ServiceParser::ParseOnrestart}},
-        {"oom_score_adjust",
-                        {1,     1,    &ServiceParser::ParseOomScoreAdjust}},
-        {"override",    {0,     0,    &ServiceParser::ParseOverride}},
-        {"priority",    {1,     1,    &ServiceParser::ParsePriority}},
-        {"restart_period",
-                        {1,     1,    &ServiceParser::ParseRestartPeriod}},
-        {"rlimit",      {3,     3,    &ServiceParser::ParseProcessRlimit}},
-        {"seclabel",    {1,     1,    &ServiceParser::ParseSeclabel}},
-        {"setenv",      {2,     2,    &ServiceParser::ParseSetenv}},
-        {"shutdown",    {1,     1,    &ServiceParser::ParseShutdown}},
-        {"sigstop",     {0,     0,    &ServiceParser::ParseSigstop}},
-        {"socket",      {3,     6,    &ServiceParser::ParseSocket}},
-        {"timeout_period",
-                        {1,     1,    &ServiceParser::ParseTimeoutPeriod}},
-        {"updatable",   {0,     0,    &ServiceParser::ParseUpdatable}},
-        {"user",        {1,     1,    &ServiceParser::ParseUser}},
-        {"writepid",    {1,     kMax, &ServiceParser::ParseWritepid}},
+                                    {1,     1,    &ServiceParser::ParseMemcgSoftLimitInBytes}},
+        {"memcg.swappiness",        {1,     1,    &ServiceParser::ParseMemcgSwappiness}},
+        {"namespace",               {1,     2,    &ServiceParser::ParseNamespace}},
+        {"oneshot",                 {0,     0,    &ServiceParser::ParseOneshot}},
+        {"onrestart",               {1,     kMax, &ServiceParser::ParseOnrestart}},
+        {"oom_score_adjust",        {1,     1,    &ServiceParser::ParseOomScoreAdjust}},
+        {"override",                {0,     0,    &ServiceParser::ParseOverride}},
+        {"priority",                {1,     1,    &ServiceParser::ParsePriority}},
+        {"reboot_on_failure",       {1,     1,    &ServiceParser::ParseRebootOnFailure}},
+        {"restart_period",          {1,     1,    &ServiceParser::ParseRestartPeriod}},
+        {"rlimit",                  {3,     3,    &ServiceParser::ParseProcessRlimit}},
+        {"seclabel",                {1,     1,    &ServiceParser::ParseSeclabel}},
+        {"setenv",                  {2,     2,    &ServiceParser::ParseSetenv}},
+        {"shutdown",                {1,     1,    &ServiceParser::ParseShutdown}},
+        {"sigstop",                 {0,     0,    &ServiceParser::ParseSigstop}},
+        {"socket",                  {3,     6,    &ServiceParser::ParseSocket}},
+        {"stdio_to_kmsg",           {0,     0,    &ServiceParser::ParseStdioToKmsg}},
+        {"timeout_period",          {1,     1,    &ServiceParser::ParseTimeoutPeriod}},
+        {"updatable",               {0,     0,    &ServiceParser::ParseUpdatable}},
+        {"user",                    {1,     1,    &ServiceParser::ParseUser}},
+        {"writepid",                {1,     kMax, &ServiceParser::ParseWritepid}},
     };
     // clang-format on
     return parser_map;
@@ -529,13 +552,8 @@
     filename_ = filename;
 
     Subcontext* restart_action_subcontext = nullptr;
-    if (subcontexts_) {
-        for (auto& subcontext : *subcontexts_) {
-            if (StartsWith(filename, subcontext.path_prefix())) {
-                restart_action_subcontext = &subcontext;
-                break;
-            }
-        }
+    if (subcontext_ && subcontext_->PathMatchesSubcontext(filename)) {
+        restart_action_subcontext = subcontext_;
     }
 
     std::vector<std::string> str_args(args.begin() + 2, args.end());
@@ -545,8 +563,13 @@
             str_args[0] = "/system/bin/watchdogd";
         }
     }
+    if (SelinuxGetVendorAndroidVersion() <= __ANDROID_API_Q__) {
+        if (str_args[0] == "/charger") {
+            str_args[0] = "/system/bin/charger";
+        }
+    }
 
-    service_ = std::make_unique<Service>(name, restart_action_subcontext, str_args);
+    service_ = std::make_unique<Service>(name, restart_action_subcontext, str_args, from_apex_);
     return {};
 }
 
diff --git a/init/service_parser.h b/init/service_parser.h
index 4729874..7bb0cc0 100644
--- a/init/service_parser.h
+++ b/init/service_parser.h
@@ -30,12 +30,14 @@
 class ServiceParser : public SectionParser {
   public:
     ServiceParser(
-            ServiceList* service_list, std::vector<Subcontext>* subcontexts,
-            const std::optional<InterfaceInheritanceHierarchyMap>& interface_inheritance_hierarchy)
+            ServiceList* service_list, Subcontext* subcontext,
+            const std::optional<InterfaceInheritanceHierarchyMap>& interface_inheritance_hierarchy,
+            bool from_apex = false)
         : service_list_(service_list),
-          subcontexts_(subcontexts),
+          subcontext_(subcontext),
           interface_inheritance_hierarchy_(interface_inheritance_hierarchy),
-          service_(nullptr) {}
+          service_(nullptr),
+          from_apex_(from_apex) {}
     Result<void> ParseSection(std::vector<std::string>&& args, const std::string& filename,
                               int line) override;
     Result<void> ParseLineSection(std::vector<std::string>&& args, int line) override;
@@ -68,12 +70,14 @@
     Result<void> ParseMemcgSwappiness(std::vector<std::string>&& args);
     Result<void> ParseNamespace(std::vector<std::string>&& args);
     Result<void> ParseProcessRlimit(std::vector<std::string>&& args);
+    Result<void> ParseRebootOnFailure(std::vector<std::string>&& args);
     Result<void> ParseRestartPeriod(std::vector<std::string>&& args);
     Result<void> ParseSeclabel(std::vector<std::string>&& args);
     Result<void> ParseSetenv(std::vector<std::string>&& args);
     Result<void> ParseShutdown(std::vector<std::string>&& args);
     Result<void> ParseSigstop(std::vector<std::string>&& args);
     Result<void> ParseSocket(std::vector<std::string>&& args);
+    Result<void> ParseStdioToKmsg(std::vector<std::string>&& args);
     Result<void> ParseTimeoutPeriod(std::vector<std::string>&& args);
     Result<void> ParseFile(std::vector<std::string>&& args);
     Result<void> ParseUser(std::vector<std::string>&& args);
@@ -83,10 +87,11 @@
     bool IsValidName(const std::string& name) const;
 
     ServiceList* service_list_;
-    std::vector<Subcontext>* subcontexts_;
+    Subcontext* subcontext_;
     std::optional<InterfaceInheritanceHierarchyMap> interface_inheritance_hierarchy_;
     std::unique_ptr<Service> service_;
     std::string filename_;
+    bool from_apex_ = false;
 };
 
 }  // namespace init
diff --git a/init/service_test.cpp b/init/service_test.cpp
index c9cc7bd..c158b0a 100644
--- a/init/service_test.cpp
+++ b/init/service_test.cpp
@@ -23,6 +23,7 @@
 
 #include <gtest/gtest.h>
 
+#include "lmkd_service.h"
 #include "util.h"
 
 namespace android {
@@ -49,7 +50,7 @@
     EXPECT_EQ(IoSchedClass_NONE, service_in_old_memory->ioprio_class());
     EXPECT_EQ(0, service_in_old_memory->ioprio_pri());
     EXPECT_EQ(0, service_in_old_memory->priority());
-    EXPECT_EQ(-1000, service_in_old_memory->oom_score_adjust());
+    EXPECT_EQ(DEFAULT_OOM_SCORE_ADJUST, service_in_old_memory->oom_score_adjust());
     EXPECT_FALSE(service_in_old_memory->process_cgroup_empty());
 
     for (std::size_t i = 0; i < memory_size; ++i) {
@@ -68,7 +69,7 @@
     EXPECT_EQ(IoSchedClass_NONE, service_in_old_memory2->ioprio_class());
     EXPECT_EQ(0, service_in_old_memory2->ioprio_pri());
     EXPECT_EQ(0, service_in_old_memory2->priority());
-    EXPECT_EQ(-1000, service_in_old_memory2->oom_score_adjust());
+    EXPECT_EQ(DEFAULT_OOM_SCORE_ADJUST, service_in_old_memory2->oom_score_adjust());
     EXPECT_FALSE(service_in_old_memory->process_cgroup_empty());
 }
 
diff --git a/init/service_utils.cpp b/init/service_utils.cpp
index 836145d..93cffd8 100644
--- a/init/service_utils.cpp
+++ b/init/service_utils.cpp
@@ -16,17 +16,18 @@
 
 #include "service_utils.h"
 
+#include <fcntl.h>
 #include <grp.h>
 #include <sys/mount.h>
 #include <sys/prctl.h>
 #include <sys/wait.h>
+#include <unistd.h>
 
 #include <android-base/file.h>
 #include <android-base/logging.h>
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
-#include <android-base/unique_fd.h>
 #include <cutils/android_get_control_file.h>
 #include <cutils/sockets.h>
 #include <processgroup/processgroup.h>
@@ -122,11 +123,15 @@
     return {};
 }
 
-void ZapStdio() {
+void SetupStdio(bool stdio_to_kmsg) {
     auto fd = unique_fd{open("/dev/null", O_RDWR | O_CLOEXEC)};
-    dup2(fd, 0);
-    dup2(fd, 1);
-    dup2(fd, 2);
+    dup2(fd, STDIN_FILENO);
+    if (stdio_to_kmsg) {
+        fd.reset(open("/dev/kmsg_debug", O_WRONLY | O_CLOEXEC));
+        if (fd == -1) fd.reset(open("/dev/null", O_WRONLY | O_CLOEXEC));
+    }
+    dup2(fd, STDOUT_FILENO);
+    dup2(fd, STDERR_FILENO);
 }
 
 void OpenConsole(const std::string& console) {
@@ -138,37 +143,44 @@
     dup2(fd, 2);
 }
 
-void PublishDescriptor(const std::string& key, const std::string& name, int fd) {
-    std::string published_name = key + name;
+}  // namespace
+
+void Descriptor::Publish() const {
+    auto published_name = name_;
+
     for (auto& c : published_name) {
         c = isalnum(c) ? c : '_';
     }
 
+    int fd = fd_.get();
+    // For safety, the FD is created as CLOEXEC, so that must be removed before publishing.
+    auto fd_flags = fcntl(fd, F_GETFD);
+    fd_flags &= ~FD_CLOEXEC;
+    if (fcntl(fd, F_SETFD, fd_flags) != 0) {
+        PLOG(ERROR) << "Failed to remove CLOEXEC from '" << published_name << "'";
+    }
+
     std::string val = std::to_string(fd);
     setenv(published_name.c_str(), val.c_str(), 1);
 }
 
-}  // namespace
-
-Result<void> SocketDescriptor::CreateAndPublish(const std::string& global_context) const {
+Result<Descriptor> SocketDescriptor::Create(const std::string& global_context) const {
     const auto& socket_context = context.empty() ? global_context : context;
-    auto result = CreateSocket(name, type, passcred, perm, uid, gid, socket_context);
+    auto result = CreateSocket(name, type | SOCK_CLOEXEC, passcred, perm, uid, gid, socket_context);
     if (!result) {
         return result.error();
     }
 
-    PublishDescriptor(ANDROID_SOCKET_ENV_PREFIX, name, *result);
-
-    return {};
+    return Descriptor(ANDROID_SOCKET_ENV_PREFIX + name, unique_fd(*result));
 }
 
-Result<void> FileDescriptor::CreateAndPublish() const {
+Result<Descriptor> FileDescriptor::Create() const {
     int flags = (type == "r") ? O_RDONLY : (type == "w") ? O_WRONLY : O_RDWR;
 
     // Make sure we do not block on open (eg: devices can chose to block on carrier detect).  Our
     // intention is never to delay launch of a service for such a condition.  The service can
     // perform its own blocking on carrier detect.
-    android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(name.c_str(), flags | O_NONBLOCK)));
+    unique_fd fd(TEMP_FAILURE_RETRY(open(name.c_str(), flags | O_NONBLOCK | O_CLOEXEC)));
 
     if (fd < 0) {
         return ErrnoError() << "Failed to open file '" << name << "'";
@@ -179,9 +191,7 @@
 
     LOG(INFO) << "Opened file '" << name << "', flags " << flags;
 
-    PublishDescriptor(ANDROID_FILE_ENV_PREFIX, name, fd.release());
-
-    return {};
+    return Descriptor(ANDROID_FILE_ENV_PREFIX + name, std::move(fd));
 }
 
 Result<void> EnterNamespaces(const NamespaceInfo& info, const std::string& name, bool pre_apexd) {
@@ -234,7 +244,7 @@
         if (setpgid(0, getpid()) == -1) {
             return ErrnoError() << "setpgid failed";
         }
-        ZapStdio();
+        SetupStdio(attr.stdio_to_kmsg);
     }
 
     for (const auto& rlimit : attr.rlimits) {
diff --git a/init/service_utils.h b/init/service_utils.h
index befce25..3f1071e 100644
--- a/init/service_utils.h
+++ b/init/service_utils.h
@@ -22,6 +22,7 @@
 #include <string>
 #include <vector>
 
+#include <android-base/unique_fd.h>
 #include <cutils/iosched_policy.h>
 
 #include "result.h"
@@ -29,6 +30,18 @@
 namespace android {
 namespace init {
 
+class Descriptor {
+  public:
+    Descriptor(const std::string& name, android::base::unique_fd fd)
+        : name_(name), fd_(std::move(fd)){};
+
+    void Publish() const;
+
+  private:
+    std::string name_;
+    android::base::unique_fd fd_;
+};
+
 struct SocketDescriptor {
     std::string name;
     int type = 0;
@@ -38,14 +51,14 @@
     std::string context;
     bool passcred = false;
 
-    Result<void> CreateAndPublish(const std::string& global_context) const;
+    Result<Descriptor> Create(const std::string& global_context) const;
 };
 
 struct FileDescriptor {
     std::string name;
     std::string type;
 
-    Result<void> CreateAndPublish() const;
+    Result<Descriptor> Create() const;
 };
 
 struct NamespaceInfo {
@@ -64,6 +77,7 @@
     gid_t gid;
     std::vector<gid_t> supp_gids;
     int priority;
+    bool stdio_to_kmsg;
 };
 Result<void> SetProcessAttributes(const ProcessAttributes& attr);
 
diff --git a/init/sigchld_handler.cpp b/init/sigchld_handler.cpp
index 984235d..9b2c7d9 100644
--- a/init/sigchld_handler.cpp
+++ b/init/sigchld_handler.cpp
@@ -28,28 +28,31 @@
 #include <android-base/scopeguard.h>
 #include <android-base/stringprintf.h>
 
+#include <thread>
+
 #include "init.h"
 #include "service.h"
 #include "service_list.h"
 
-using android::base::StringPrintf;
 using android::base::boot_clock;
 using android::base::make_scope_guard;
+using android::base::StringPrintf;
+using android::base::Timer;
 
 namespace android {
 namespace init {
 
-static bool ReapOneProcess() {
+static pid_t ReapOneProcess() {
     siginfo_t siginfo = {};
     // This returns a zombie pid or informs us that there are no zombies left to be reaped.
     // It does NOT reap the pid; that is done below.
     if (TEMP_FAILURE_RETRY(waitid(P_ALL, 0, &siginfo, WEXITED | WNOHANG | WNOWAIT)) != 0) {
         PLOG(ERROR) << "waitid failed";
-        return false;
+        return 0;
     }
 
     auto pid = siginfo.si_pid;
-    if (pid == 0) return false;
+    if (pid == 0) return 0;
 
     // At this point we know we have a zombie pid, so we use this scopeguard to reap the pid
     // whenever the function returns from this point forward.
@@ -92,7 +95,7 @@
         LOG(INFO) << name << " received signal " << siginfo.si_status << wait_string;
     }
 
-    if (!service) return true;
+    if (!service) return pid;
 
     service->Reap(siginfo);
 
@@ -100,13 +103,33 @@
         ServiceList::GetInstance().RemoveService(*service);
     }
 
-    return true;
+    return pid;
 }
 
 void ReapAnyOutstandingChildren() {
-    while (ReapOneProcess()) {
+    while (ReapOneProcess() != 0) {
     }
 }
 
+void WaitToBeReaped(const std::vector<pid_t>& pids, std::chrono::milliseconds timeout) {
+    Timer t;
+    std::vector<pid_t> alive_pids(pids.begin(), pids.end());
+    while (!alive_pids.empty() && t.duration() < timeout) {
+        pid_t pid;
+        while ((pid = ReapOneProcess()) != 0) {
+            auto it = std::find(alive_pids.begin(), alive_pids.end(), pid);
+            if (it != alive_pids.end()) {
+                alive_pids.erase(it);
+            }
+        }
+        if (alive_pids.empty()) {
+            break;
+        }
+        std::this_thread::sleep_for(50ms);
+    }
+    LOG(INFO) << "Waiting for " << pids.size() << " pids to be reaped took " << t << " with "
+              << alive_pids.size() << " of them still running";
+}
+
 }  // namespace init
 }  // namespace android
diff --git a/init/sigchld_handler.h b/init/sigchld_handler.h
index 30063f2..fac1020 100644
--- a/init/sigchld_handler.h
+++ b/init/sigchld_handler.h
@@ -17,11 +17,16 @@
 #ifndef _INIT_SIGCHLD_HANDLER_H_
 #define _INIT_SIGCHLD_HANDLER_H_
 
+#include <chrono>
+#include <vector>
+
 namespace android {
 namespace init {
 
 void ReapAnyOutstandingChildren();
 
+void WaitToBeReaped(const std::vector<pid_t>& pids, std::chrono::milliseconds timeout);
+
 }  // namespace init
 }  // namespace android
 
diff --git a/init/subcontext.cpp b/init/subcontext.cpp
index 00f91d8..f3f759d 100644
--- a/init/subcontext.cpp
+++ b/init/subcontext.cpp
@@ -18,16 +18,17 @@
 
 #include <fcntl.h>
 #include <poll.h>
-#include <sys/socket.h>
 #include <unistd.h>
 
 #include <android-base/file.h>
 #include <android-base/logging.h>
+#include <android-base/properties.h>
 #include <android-base/strings.h>
 #include <selinux/android.h>
 
 #include "action.h"
 #include "builtins.h"
+#include "proto_utils.h"
 #include "util.h"
 
 #if defined(__ANDROID__)
@@ -48,55 +49,9 @@
 
 namespace android {
 namespace init {
-
-const std::string kInitContext = "u:r:init:s0";
-const std::string kVendorContext = "u:r:vendor_init:s0";
-
-const char* const paths_and_secontexts[2][2] = {
-    {"/vendor", kVendorContext.c_str()},
-    {"/odm", kVendorContext.c_str()},
-};
-
 namespace {
 
-constexpr size_t kBufferSize = 4096;
-
-Result<std::string> ReadMessage(int socket) {
-    char buffer[kBufferSize] = {};
-    auto result = TEMP_FAILURE_RETRY(recv(socket, buffer, sizeof(buffer), 0));
-    if (result == 0) {
-        return Error();
-    } else if (result < 0) {
-        return ErrnoError();
-    }
-    return std::string(buffer, result);
-}
-
-template <typename T>
-Result<void> SendMessage(int socket, const T& message) {
-    std::string message_string;
-    if (!message.SerializeToString(&message_string)) {
-        return Error() << "Unable to serialize message";
-    }
-
-    if (message_string.size() > kBufferSize) {
-        return Error() << "Serialized message too long to send";
-    }
-
-    if (auto result =
-            TEMP_FAILURE_RETRY(send(socket, message_string.c_str(), message_string.size(), 0));
-        result != static_cast<long>(message_string.size())) {
-        return ErrnoError() << "send() failed to send message contents";
-    }
-    return {};
-}
-
-std::vector<std::pair<std::string, std::string>> properties_to_set;
-
-uint32_t SubcontextPropertySet(const std::string& name, const std::string& value) {
-    properties_to_set.emplace_back(name, value);
-    return 0;
-}
+std::string shutdown_command;
 
 class SubcontextProcess {
   public:
@@ -131,14 +86,6 @@
         result = RunBuiltinFunction(map_result->function, args, context_);
     }
 
-    for (const auto& [name, value] : properties_to_set) {
-        auto property = reply->add_properties_to_set();
-        property->set_name(name);
-        property->set_value(value);
-    }
-
-    properties_to_set.clear();
-
     if (result) {
         reply->set_success(true);
     } else {
@@ -208,6 +155,11 @@
                            << subcontext_command.command_case();
         }
 
+        if (!shutdown_command.empty()) {
+            reply.set_trigger_shutdown(shutdown_command);
+            shutdown_command.clear();
+        }
+
         if (auto result = SendMessage(init_fd_, reply); !result) {
             LOG(FATAL) << "Failed to send message to init: " << result.error();
         }
@@ -224,7 +176,7 @@
 
     SelabelInitialize();
 
-    property_set = SubcontextPropertySet;
+    trigger_shutdown = [](const std::string& command) { shutdown_command = command; };
 
     auto subcontext_process = SubcontextProcess(function_map, context, init_fd);
     subcontext_process.MainLoop();
@@ -252,8 +204,12 @@
             PLOG(FATAL) << "Could not dup child_fd";
         }
 
-        if (setexeccon(context_.c_str()) < 0) {
-            PLOG(FATAL) << "Could not set execcon for '" << context_ << "'";
+        // We don't switch contexts if we're running the unit tests.  We don't use std::optional,
+        // since we still need a real context string to pass to the builtin functions.
+        if (context_ != kTestContext) {
+            if (setexeccon(context_.c_str()) < 0) {
+                PLOG(FATAL) << "Could not set execcon for '" << context_ << "'";
+            }
         }
 
         auto init_path = GetExecutablePath();
@@ -280,6 +236,15 @@
     Fork();
 }
 
+bool Subcontext::PathMatchesSubcontext(const std::string& path) {
+    for (const auto& prefix : path_prefixes_) {
+        if (StartsWith(path, prefix)) {
+            return true;
+        }
+    }
+    return false;
+}
+
 Result<SubcontextReply> Subcontext::TransmitMessage(const SubcontextCommand& subcontext_command) {
     if (auto result = SendMessage(socket_, subcontext_command); !result) {
         Restart();
@@ -297,6 +262,11 @@
         Restart();
         return Error() << "Unable to parse message from subcontext";
     }
+
+    if (subcontext_reply.has_trigger_shutdown()) {
+        trigger_shutdown(subcontext_reply.trigger_shutdown());
+    }
+
     return subcontext_reply;
 }
 
@@ -311,15 +281,6 @@
         return subcontext_reply.error();
     }
 
-    for (const auto& property : subcontext_reply->properties_to_set()) {
-        ucred cr = {.pid = pid_, .uid = 0, .gid = 0};
-        std::string error;
-        if (HandlePropertySet(property.name(), property.value(), context_, cr, &error) != 0) {
-            LOG(ERROR) << "Subcontext init could not set '" << property.name() << "' to '"
-                       << property.value() << "': " << error;
-        }
-    }
-
     if (subcontext_reply->reply_case() == SubcontextReply::kFailure) {
         auto& failure = subcontext_reply->failure();
         return ResultError(failure.error_string(), failure.error_errno());
@@ -365,13 +326,12 @@
 static std::vector<Subcontext> subcontexts;
 static bool shutting_down;
 
-std::vector<Subcontext>* InitializeSubcontexts() {
+std::unique_ptr<Subcontext> InitializeSubcontext() {
     if (SelinuxGetVendorAndroidVersion() >= __ANDROID_API_P__) {
-        for (const auto& [path_prefix, secontext] : paths_and_secontexts) {
-            subcontexts.emplace_back(path_prefix, secontext);
-        }
+        return std::make_unique<Subcontext>(std::vector<std::string>{"/vendor", "/odm"},
+                                            kVendorContext);
     }
-    return &subcontexts;
+    return nullptr;
 }
 
 bool SubcontextChildReap(pid_t pid) {
diff --git a/init/subcontext.h b/init/subcontext.h
index 591521f..5e1d8a8 100644
--- a/init/subcontext.h
+++ b/init/subcontext.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _INIT_SUBCONTEXT_H
-#define _INIT_SUBCONTEXT_H
+#pragma once
 
 #include <signal.h>
 
@@ -31,22 +30,22 @@
 namespace android {
 namespace init {
 
-extern const std::string kInitContext;
-extern const std::string kVendorContext;
-extern const char* const paths_and_secontexts[2][2];
+static constexpr const char kInitContext[] = "u:r:init:s0";
+static constexpr const char kVendorContext[] = "u:r:vendor_init:s0";
+static constexpr const char kTestContext[] = "test-test-test";
 
 class Subcontext {
   public:
-    Subcontext(std::string path_prefix, std::string context)
-        : path_prefix_(std::move(path_prefix)), context_(std::move(context)), pid_(0) {
+    Subcontext(std::vector<std::string> path_prefixes, std::string context)
+        : path_prefixes_(std::move(path_prefixes)), context_(std::move(context)), pid_(0) {
         Fork();
     }
 
     Result<void> Execute(const std::vector<std::string>& args);
     Result<std::vector<std::string>> ExpandArgs(const std::vector<std::string>& args);
     void Restart();
+    bool PathMatchesSubcontext(const std::string& path);
 
-    const std::string& path_prefix() const { return path_prefix_; }
     const std::string& context() const { return context_; }
     pid_t pid() const { return pid_; }
 
@@ -54,18 +53,16 @@
     void Fork();
     Result<SubcontextReply> TransmitMessage(const SubcontextCommand& subcontext_command);
 
-    std::string path_prefix_;
+    std::vector<std::string> path_prefixes_;
     std::string context_;
     pid_t pid_;
     android::base::unique_fd socket_;
 };
 
 int SubcontextMain(int argc, char** argv, const BuiltinFunctionMap* function_map);
-std::vector<Subcontext>* InitializeSubcontexts();
+std::unique_ptr<Subcontext> InitializeSubcontext();
 bool SubcontextChildReap(pid_t pid);
 void SubcontextTerminate();
 
 }  // namespace init
 }  // namespace android
-
-#endif
diff --git a/init/subcontext.proto b/init/subcontext.proto
index c31f4fb..068c7ce 100644
--- a/init/subcontext.proto
+++ b/init/subcontext.proto
@@ -39,9 +39,5 @@
         ExpandArgsReply expand_args_reply = 3;
     }
 
-    message PropertyToSet {
-        optional string name = 1;
-        optional string value = 2;
-    }
-    repeated PropertyToSet properties_to_set = 4;
+    optional string trigger_shutdown = 4;
 }
\ No newline at end of file
diff --git a/init/subcontext_benchmark.cpp b/init/subcontext_benchmark.cpp
index f6fee8a..ccef2f3 100644
--- a/init/subcontext_benchmark.cpp
+++ b/init/subcontext_benchmark.cpp
@@ -33,7 +33,7 @@
         return;
     }
 
-    auto subcontext = Subcontext("path", context);
+    auto subcontext = Subcontext({"path"}, context);
     free(context);
 
     while (state.KeepRunning()) {
diff --git a/init/subcontext_test.cpp b/init/subcontext_test.cpp
index ae89c38..2e5a256 100644
--- a/init/subcontext_test.cpp
+++ b/init/subcontext_test.cpp
@@ -26,6 +26,7 @@
 #include <selinux/selinux.h>
 
 #include "builtin_arguments.h"
+#include "util.h"
 
 using namespace std::literals;
 
@@ -38,24 +39,12 @@
 namespace android {
 namespace init {
 
-// I would use test fixtures, but I cannot skip the test if not root with them, so instead we have
-// this test runner.
 template <typename F>
 void RunTest(F&& test_function) {
-    if (getuid() != 0) {
-        GTEST_LOG_(INFO) << "Skipping test, must be run as root.";
-        return;
-    }
-
-    char* context;
-    ASSERT_EQ(0, getcon(&context));
-    auto context_string = std::string(context);
-    free(context);
-
-    auto subcontext = Subcontext("dummy_path", context_string);
+    auto subcontext = Subcontext({"dummy_path"}, kTestContext);
     ASSERT_NE(0, subcontext.pid());
 
-    test_function(subcontext, context_string);
+    test_function(subcontext);
 
     if (subcontext.pid() > 0) {
         kill(subcontext.pid(), SIGTERM);
@@ -64,7 +53,7 @@
 }
 
 TEST(subcontext, CheckDifferentPid) {
-    RunTest([](auto& subcontext, auto& context_string) {
+    RunTest([](auto& subcontext) {
         auto result = subcontext.Execute(std::vector<std::string>{"return_pids_as_error"});
         ASSERT_FALSE(result);
 
@@ -77,7 +66,12 @@
 }
 
 TEST(subcontext, SetProp) {
-    RunTest([](auto& subcontext, auto& context_string) {
+    if (getuid() != 0) {
+        GTEST_SKIP() << "Skipping test, must be run as root.";
+        return;
+    }
+
+    RunTest([](auto& subcontext) {
         SetProperty("init.test.subcontext", "fail");
         WaitForProperty("init.test.subcontext", "fail");
 
@@ -94,7 +88,7 @@
 }
 
 TEST(subcontext, MultipleCommands) {
-    RunTest([](auto& subcontext, auto& context_string) {
+    RunTest([](auto& subcontext) {
         auto first_pid = subcontext.pid();
 
         auto expected_words = std::vector<std::string>{
@@ -121,7 +115,7 @@
 }
 
 TEST(subcontext, RecoverAfterAbort) {
-    RunTest([](auto& subcontext, auto& context_string) {
+    RunTest([](auto& subcontext) {
         auto first_pid = subcontext.pid();
 
         auto result = subcontext.Execute(std::vector<std::string>{"cause_log_fatal"});
@@ -135,15 +129,27 @@
 }
 
 TEST(subcontext, ContextString) {
-    RunTest([](auto& subcontext, auto& context_string) {
+    RunTest([](auto& subcontext) {
         auto result = subcontext.Execute(std::vector<std::string>{"return_context_as_error"});
         ASSERT_FALSE(result);
-        ASSERT_EQ(context_string, result.error().message());
+        ASSERT_EQ(kTestContext, result.error().message());
     });
 }
 
+TEST(subcontext, TriggerShutdown) {
+    static constexpr const char kTestShutdownCommand[] = "reboot,test-shutdown-command";
+    static std::string trigger_shutdown_command;
+    trigger_shutdown = [](const std::string& command) { trigger_shutdown_command = command; };
+    RunTest([](auto& subcontext) {
+        auto result = subcontext.Execute(
+                std::vector<std::string>{"trigger_shutdown", kTestShutdownCommand});
+        ASSERT_TRUE(result);
+    });
+    EXPECT_EQ(kTestShutdownCommand, trigger_shutdown_command);
+}
+
 TEST(subcontext, ExpandArgs) {
-    RunTest([](auto& subcontext, auto& context_string) {
+    RunTest([](auto& subcontext) {
         auto args = std::vector<std::string>{
             "first",
             "${ro.hardware}",
@@ -159,7 +165,7 @@
 }
 
 TEST(subcontext, ExpandArgsFailure) {
-    RunTest([](auto& subcontext, auto& context_string) {
+    RunTest([](auto& subcontext) {
         auto args = std::vector<std::string>{
             "first",
             "${",
@@ -207,6 +213,11 @@
         return Error() << args.context;
     };
 
+    auto do_trigger_shutdown = [](const BuiltinArguments& args) -> Result<void> {
+        trigger_shutdown(args[1]);
+        return {};
+    };
+
     // clang-format off
     BuiltinFunctionMap test_function_map = {
         {"return_pids_as_error",        {0,     0,      {true,  do_return_pids_as_error}}},
@@ -216,6 +227,7 @@
         {"cause_log_fatal",             {0,     0,      {true,  do_cause_log_fatal}}},
         {"generate_sane_error",         {0,     0,      {true,  do_generate_sane_error}}},
         {"return_context_as_error",     {0,     0,      {true,  do_return_context_as_error}}},
+        {"trigger_shutdown",            {1,     1,      {true,  do_trigger_shutdown}}},
     };
     // clang-format on
     return test_function_map;
@@ -224,12 +236,8 @@
 }  // namespace init
 }  // namespace android
 
-int main(int argc, char** argv) {
-    if (argc > 1 && !strcmp(basename(argv[1]), "subcontext")) {
-        auto test_function_map = android::init::BuildTestFunctionMap();
-        return android::init::SubcontextMain(argc, argv, &test_function_map);
-    }
-
-    testing::InitGoogleTest(&argc, argv);
-    return RUN_ALL_TESTS();
+// init_test.cpp contains the main entry point for all init tests.
+int SubcontextTestChildMain(int argc, char** argv) {
+    auto test_function_map = android::init::BuildTestFunctionMap();
+    return android::init::SubcontextMain(argc, argv, &test_function_map);
 }
diff --git a/init/sysprop/Android.bp b/init/sysprop/Android.bp
new file mode 100644
index 0000000..7582875
--- /dev/null
+++ b/init/sysprop/Android.bp
@@ -0,0 +1,7 @@
+sysprop_library {
+  name: "com.android.sysprop.init",
+  srcs: ["InitProperties.sysprop"],
+  property_owner: "Platform",
+  api_packages: ["android.sysprop"],
+  recovery_available: true,
+}
diff --git a/libmeminfo/vts/Android.mk b/init/sysprop/InitProperties.sysprop
similarity index 64%
rename from libmeminfo/vts/Android.mk
rename to init/sysprop/InitProperties.sysprop
index 62d68d9..d6a1ab6 100644
--- a/libmeminfo/vts/Android.mk
+++ b/init/sysprop/InitProperties.sysprop
@@ -1,4 +1,3 @@
-#
 # Copyright (C) 2019 The Android Open Source Project
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -12,11 +11,17 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-#
 
-LOCAL_PATH := $(call my-dir)
+owner: Platform
+module: "android.sysprop.InitProperties"
 
-include $(CLEAR_VARS)
+# Serves as a signal to all processes that userspace reboot is happening.
+prop {
+    api_name: "userspace_reboot_in_progress"
+    type: Boolean
+    scope: Public
+    access: ReadWrite
+    prop_name: "sys.init.userspace_reboot.in_progress"
+    integer_as_bool: true
+}
 
-LOCAL_MODULE := VtsKernelMemInfoTest
--include test/vts/tools/build/Android.host_config.mk
diff --git a/init/sysprop/api/com.android.sysprop.init-current.txt b/init/sysprop/api/com.android.sysprop.init-current.txt
new file mode 100644
index 0000000..8da50e0
--- /dev/null
+++ b/init/sysprop/api/com.android.sysprop.init-current.txt
@@ -0,0 +1,9 @@
+props {
+  module: "android.sysprop.InitProperties"
+  prop {
+    api_name: "userspace_reboot_in_progress"
+    access: ReadWrite
+    prop_name: "sys.init.userspace_reboot.in_progress"
+    integer_as_bool: true
+  }
+}
diff --git a/init/sysprop/api/com.android.sysprop.init-latest.txt b/init/sysprop/api/com.android.sysprop.init-latest.txt
new file mode 100644
index 0000000..c835b95
--- /dev/null
+++ b/init/sysprop/api/com.android.sysprop.init-latest.txt
@@ -0,0 +1,9 @@
+props {
+  module: "android.sysprop.InitProperties"
+  prop {
+    api_name: "userspace_reboot_in_progress"
+    scope: Public
+    prop_name: "sys.init.userspace_reboot.in_progress"
+    integer_as_bool: true
+  }
+}
diff --git a/init/uevent_listener.cpp b/init/uevent_listener.cpp
index ac633776..d8d9b36 100644
--- a/init/uevent_listener.cpp
+++ b/init/uevent_listener.cpp
@@ -100,7 +100,7 @@
     int n = uevent_kernel_multicast_recv(device_fd_, msg, UEVENT_MSG_LEN);
     if (n <= 0) {
         if (errno != EAGAIN && errno != EWOULDBLOCK) {
-            LOG(ERROR) << "Error reading from Uevent Fd";
+            PLOG(ERROR) << "Error reading from Uevent Fd";
         }
         return false;
     }
@@ -171,7 +171,7 @@
     return RegenerateUeventsForDir(d.get(), callback);
 }
 
-static const char* kRegenerationPaths[] = {"/sys/class", "/sys/block", "/sys/devices"};
+static const char* kRegenerationPaths[] = {"/sys/devices"};
 
 void UeventListener::RegenerateUevents(const ListenerCallback& callback) const {
     for (const auto path : kRegenerationPaths) {
diff --git a/init/ueventd.cpp b/init/ueventd.cpp
index 8b2cf62..d2b503b 100644
--- a/init/ueventd.cpp
+++ b/init/ueventd.cpp
@@ -17,12 +17,15 @@
 #include "ueventd.h"
 
 #include <ctype.h>
+#include <dirent.h>
 #include <fcntl.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/stat.h>
 #include <sys/wait.h>
+#include <unistd.h>
 
 #include <set>
 #include <thread>
@@ -110,10 +113,12 @@
 class ColdBoot {
   public:
     ColdBoot(UeventListener& uevent_listener,
-             std::vector<std::unique_ptr<UeventHandler>>& uevent_handlers)
+             std::vector<std::unique_ptr<UeventHandler>>& uevent_handlers,
+             bool enable_parallel_restorecon)
         : uevent_listener_(uevent_listener),
           uevent_handlers_(uevent_handlers),
-          num_handler_subprocesses_(std::thread::hardware_concurrency() ?: 4) {}
+          num_handler_subprocesses_(std::thread::hardware_concurrency() ?: 4),
+          enable_parallel_restorecon_(enable_parallel_restorecon) {}
 
     void Run();
 
@@ -121,16 +126,21 @@
     void UeventHandlerMain(unsigned int process_num, unsigned int total_processes);
     void RegenerateUevents();
     void ForkSubProcesses();
-    void DoRestoreCon();
     void WaitForSubProcesses();
+    void RestoreConHandler(unsigned int process_num, unsigned int total_processes);
+    void GenerateRestoreCon(const std::string& directory);
 
     UeventListener& uevent_listener_;
     std::vector<std::unique_ptr<UeventHandler>>& uevent_handlers_;
 
     unsigned int num_handler_subprocesses_;
+    bool enable_parallel_restorecon_;
+
     std::vector<Uevent> uevent_queue_;
 
     std::set<pid_t> subprocess_pids_;
+
+    std::vector<std::string> restorecon_queue_;
 };
 
 void ColdBoot::UeventHandlerMain(unsigned int process_num, unsigned int total_processes) {
@@ -141,7 +151,35 @@
             uevent_handler->HandleUevent(uevent);
         }
     }
-    _exit(EXIT_SUCCESS);
+}
+
+void ColdBoot::RestoreConHandler(unsigned int process_num, unsigned int total_processes) {
+    for (unsigned int i = process_num; i < restorecon_queue_.size(); i += total_processes) {
+        auto& dir = restorecon_queue_[i];
+
+        selinux_android_restorecon(dir.c_str(), SELINUX_ANDROID_RESTORECON_RECURSE);
+    }
+}
+
+void ColdBoot::GenerateRestoreCon(const std::string& directory) {
+    std::unique_ptr<DIR, decltype(&closedir)> dir(opendir(directory.c_str()), &closedir);
+
+    if (!dir) return;
+
+    struct dirent* dent;
+    while ((dent = readdir(dir.get())) != NULL) {
+        if (strcmp(dent->d_name, ".") == 0 || strcmp(dent->d_name, "..") == 0) continue;
+
+        struct stat st;
+        if (fstatat(dirfd(dir.get()), dent->d_name, &st, 0) == -1) continue;
+
+        if (S_ISDIR(st.st_mode)) {
+            std::string fullpath = directory + "/" + dent->d_name;
+            if (fullpath != "/sys/devices") {
+                restorecon_queue_.emplace_back(fullpath);
+            }
+        }
+    }
 }
 
 void ColdBoot::RegenerateUevents() {
@@ -160,16 +198,16 @@
 
         if (pid == 0) {
             UeventHandlerMain(i, num_handler_subprocesses_);
+            if (enable_parallel_restorecon_) {
+                RestoreConHandler(i, num_handler_subprocesses_);
+            }
+            _exit(EXIT_SUCCESS);
         }
 
         subprocess_pids_.emplace(pid);
     }
 }
 
-void ColdBoot::DoRestoreCon() {
-    selinux_android_restorecon("/sys", SELINUX_ANDROID_RESTORECON_RECURSE);
-}
-
 void ColdBoot::WaitForSubProcesses() {
     // Treat subprocesses that crash or get stuck the same as if ueventd itself has crashed or gets
     // stuck.
@@ -208,9 +246,19 @@
 
     RegenerateUevents();
 
+    if (enable_parallel_restorecon_) {
+        selinux_android_restorecon("/sys", 0);
+        selinux_android_restorecon("/sys/devices", 0);
+        GenerateRestoreCon("/sys");
+        // takes long time for /sys/devices, parallelize it
+        GenerateRestoreCon("/sys/devices");
+    }
+
     ForkSubProcesses();
 
-    DoRestoreCon();
+    if (!enable_parallel_restorecon_) {
+        selinux_android_restorecon("/sys", SELINUX_ANDROID_RESTORECON_RECURSE);
+    }
 
     WaitForSubProcesses();
 
@@ -240,7 +288,7 @@
     // TODO: cleanup platform ueventd.rc to remove vendor specific device node entries (b/34968103)
     auto hardware = android::base::GetProperty("ro.hardware", "");
 
-    auto ueventd_configuration = ParseConfig({"/ueventd.rc", "/vendor/ueventd.rc",
+    auto ueventd_configuration = ParseConfig({"/system/etc/ueventd.rc", "/vendor/ueventd.rc",
                                               "/odm/ueventd.rc", "/ueventd." + hardware + ".rc"});
 
     uevent_handlers.emplace_back(std::make_unique<DeviceHandler>(
@@ -248,7 +296,8 @@
             std::move(ueventd_configuration.sysfs_permissions),
             std::move(ueventd_configuration.subsystems), android::fs_mgr::GetBootDevices(), true));
     uevent_handlers.emplace_back(std::make_unique<FirmwareHandler>(
-            std::move(ueventd_configuration.firmware_directories)));
+            std::move(ueventd_configuration.firmware_directories),
+            std::move(ueventd_configuration.external_firmware_handlers)));
 
     if (ueventd_configuration.enable_modalias_handling) {
         std::vector<std::string> base_paths = {"/odm/lib/modules", "/vendor/lib/modules"};
@@ -257,7 +306,8 @@
     UeventListener uevent_listener(ueventd_configuration.uevent_socket_rcvbuf_size);
 
     if (!android::base::GetBoolProperty(kColdBootDoneProp, false)) {
-        ColdBoot cold_boot(uevent_listener, uevent_handlers);
+        ColdBoot cold_boot(uevent_listener, uevent_handlers,
+                           ueventd_configuration.enable_parallel_restorecon);
         cold_boot.Run();
     }
 
diff --git a/init/ueventd_parser.cpp b/init/ueventd_parser.cpp
index 8ee0cce..a74b247 100644
--- a/init/ueventd_parser.cpp
+++ b/init/ueventd_parser.cpp
@@ -88,18 +88,42 @@
     return {};
 }
 
-Result<void> ParseModaliasHandlingLine(std::vector<std::string>&& args,
-                                       bool* enable_modalias_handling) {
+Result<void> ParseExternalFirmwareHandlerLine(
+        std::vector<std::string>&& args,
+        std::vector<ExternalFirmwareHandler>* external_firmware_handlers) {
+    if (args.size() != 4) {
+        return Error() << "external_firmware_handler lines must have exactly 3 parameters";
+    }
+
+    if (std::find_if(external_firmware_handlers->begin(), external_firmware_handlers->end(),
+                     [&args](const auto& other) { return other.devpath == args[2]; }) !=
+        external_firmware_handlers->end()) {
+        return Error() << "found a previous external_firmware_handler with the same devpath, '"
+                       << args[2] << "'";
+    }
+
+    passwd* pwd = getpwnam(args[2].c_str());
+    if (!pwd) {
+        return ErrnoError() << "invalid handler uid'" << args[2] << "'";
+    }
+
+    ExternalFirmwareHandler handler(std::move(args[1]), pwd->pw_uid, std::move(args[3]));
+    external_firmware_handlers->emplace_back(std::move(handler));
+
+    return {};
+}
+
+Result<void> ParseEnabledDisabledLine(std::vector<std::string>&& args, bool* feature) {
     if (args.size() != 2) {
-        return Error() << "modalias_handling lines take exactly one parameter";
+        return Error() << args[0] << " lines take exactly one parameter";
     }
 
     if (args[1] == "enabled") {
-        *enable_modalias_handling = true;
+        *feature = true;
     } else if (args[1] == "disabled") {
-        *enable_modalias_handling = false;
+        *feature = false;
     } else {
-        return Error() << "modalias_handling takes either 'enabled' or 'disabled' as a parameter";
+        return Error() << args[0] << " takes either 'enabled' or 'disabled' as a parameter";
     }
 
     return {};
@@ -212,12 +236,18 @@
     parser.AddSingleLineParser("firmware_directories",
                                std::bind(ParseFirmwareDirectoriesLine, _1,
                                          &ueventd_configuration.firmware_directories));
+    parser.AddSingleLineParser("external_firmware_handler",
+                               std::bind(ParseExternalFirmwareHandlerLine, _1,
+                                         &ueventd_configuration.external_firmware_handlers));
     parser.AddSingleLineParser("modalias_handling",
-                               std::bind(ParseModaliasHandlingLine, _1,
+                               std::bind(ParseEnabledDisabledLine, _1,
                                          &ueventd_configuration.enable_modalias_handling));
     parser.AddSingleLineParser("uevent_socket_rcvbuf_size",
                                std::bind(ParseUeventSocketRcvbufSizeLine, _1,
                                          &ueventd_configuration.uevent_socket_rcvbuf_size));
+    parser.AddSingleLineParser("parallel_restorecon",
+                               std::bind(ParseEnabledDisabledLine, _1,
+                                         &ueventd_configuration.enable_parallel_restorecon));
 
     for (const auto& config : configs) {
         parser.ParseConfig(config);
diff --git a/init/ueventd_parser.h b/init/ueventd_parser.h
index d476dec..eaafa5a 100644
--- a/init/ueventd_parser.h
+++ b/init/ueventd_parser.h
@@ -14,13 +14,13 @@
  * limitations under the License.
  */
 
-#ifndef _INIT_UEVENTD_PARSER_H
-#define _INIT_UEVENTD_PARSER_H
+#pragma once
 
 #include <string>
 #include <vector>
 
 #include "devices.h"
+#include "firmware_handler.h"
 
 namespace android {
 namespace init {
@@ -30,13 +30,13 @@
     std::vector<SysfsPermissions> sysfs_permissions;
     std::vector<Permissions> dev_permissions;
     std::vector<std::string> firmware_directories;
+    std::vector<ExternalFirmwareHandler> external_firmware_handlers;
     bool enable_modalias_handling = false;
     size_t uevent_socket_rcvbuf_size = 0;
+    bool enable_parallel_restorecon = false;
 };
 
 UeventdConfiguration ParseConfig(const std::vector<std::string>& configs);
 
 }  // namespace init
 }  // namespace android
-
-#endif
diff --git a/init/ueventd_parser_test.cpp b/init/ueventd_parser_test.cpp
index 9c1cedf..172ba0b 100644
--- a/init/ueventd_parser_test.cpp
+++ b/init/ueventd_parser_test.cpp
@@ -20,6 +20,8 @@
 #include <gtest/gtest.h>
 #include <private/android_filesystem_config.h>
 
+#include "firmware_handler.h"
+
 namespace android {
 namespace init {
 
@@ -93,7 +95,7 @@
             {"test_devname2", Subsystem::DEVNAME_UEVENT_DEVNAME, "/dev"},
             {"test_devpath_dirname", Subsystem::DEVNAME_UEVENT_DEVPATH, "/dev/graphics"}};
 
-    TestUeventdFile(ueventd_file, {subsystems, {}, {}, {}});
+    TestUeventdFile(ueventd_file, {subsystems, {}, {}, {}, {}});
 }
 
 TEST(ueventd_parser, Permissions) {
@@ -119,7 +121,7 @@
             {"/sys/devices/virtual/*/input", "poll_delay", 0660, AID_ROOT, AID_INPUT},
     };
 
-    TestUeventdFile(ueventd_file, {{}, sysfs_permissions, permissions, {}});
+    TestUeventdFile(ueventd_file, {{}, sysfs_permissions, permissions, {}, {}});
 }
 
 TEST(ueventd_parser, FirmwareDirectories) {
@@ -135,7 +137,52 @@
             "/more",
     };
 
-    TestUeventdFile(ueventd_file, {{}, {}, {}, firmware_directories});
+    TestUeventdFile(ueventd_file, {{}, {}, {}, firmware_directories, {}});
+}
+
+TEST(ueventd_parser, ExternalFirmwareHandlers) {
+    auto ueventd_file = R"(
+external_firmware_handler devpath root handler_path
+external_firmware_handler /devices/path/firmware/something001.bin system /vendor/bin/firmware_handler.sh
+external_firmware_handler /devices/path/firmware/something001.bin radio "/vendor/bin/firmware_handler.sh --has --arguments"
+)";
+
+    auto external_firmware_handlers = std::vector<ExternalFirmwareHandler>{
+            {
+                    "devpath",
+                    AID_ROOT,
+                    "handler_path",
+            },
+            {
+                    "/devices/path/firmware/something001.bin",
+                    AID_SYSTEM,
+                    "/vendor/bin/firmware_handler.sh",
+            },
+            {
+                    "/devices/path/firmware/something001.bin",
+                    AID_RADIO,
+                    "/vendor/bin/firmware_handler.sh --has --arguments",
+            },
+    };
+
+    TestUeventdFile(ueventd_file, {{}, {}, {}, {}, external_firmware_handlers});
+}
+
+TEST(ueventd_parser, ExternalFirmwareHandlersDuplicate) {
+    auto ueventd_file = R"(
+external_firmware_handler devpath root handler_path
+external_firmware_handler devpath root handler_path2
+)";
+
+    auto external_firmware_handlers = std::vector<ExternalFirmwareHandler>{
+            {
+                    "devpath",
+                    AID_ROOT,
+                    "handler_path",
+            },
+    };
+
+    TestUeventdFile(ueventd_file, {{}, {}, {}, {}, external_firmware_handlers});
 }
 
 TEST(ueventd_parser, UeventSocketRcvbufSize) {
@@ -144,7 +191,25 @@
 uevent_socket_rcvbuf_size 8M
 )";
 
-    TestUeventdFile(ueventd_file, {{}, {}, {}, {}, false, 8 * 1024 * 1024});
+    TestUeventdFile(ueventd_file, {{}, {}, {}, {}, {}, false, 8 * 1024 * 1024});
+}
+
+TEST(ueventd_parser, EnabledDisabledLines) {
+    auto ueventd_file = R"(
+modalias_handling enabled
+parallel_restorecon enabled
+modalias_handling disabled
+)";
+
+    TestUeventdFile(ueventd_file, {{}, {}, {}, {}, {}, false, 0, true});
+
+    auto ueventd_file2 = R"(
+parallel_restorecon enabled
+modalias_handling enabled
+parallel_restorecon disabled
+)";
+
+    TestUeventdFile(ueventd_file2, {{}, {}, {}, {}, {}, true, 0, false});
 }
 
 TEST(ueventd_parser, AllTogether) {
@@ -178,7 +243,11 @@
 /sys/devices/virtual/*/input   poll_delay  0660  root   input
 firmware_directories /more
 
+external_firmware_handler /devices/path/firmware/firmware001.bin root /vendor/bin/touch.sh
+
 uevent_socket_rcvbuf_size 6M
+modalias_handling enabled
+parallel_restorecon enabled
 
 #ending comment
 )";
@@ -208,10 +277,15 @@
             "/more",
     };
 
+    auto external_firmware_handlers = std::vector<ExternalFirmwareHandler>{
+            {"/devices/path/firmware/firmware001.bin", AID_ROOT, "/vendor/bin/touch.sh"},
+    };
+
     size_t uevent_socket_rcvbuf_size = 6 * 1024 * 1024;
 
-    TestUeventdFile(ueventd_file, {subsystems, sysfs_permissions, permissions, firmware_directories,
-                                   false, uevent_socket_rcvbuf_size});
+    TestUeventdFile(ueventd_file,
+                    {subsystems, sysfs_permissions, permissions, firmware_directories,
+                     external_firmware_handlers, true, uevent_socket_rcvbuf_size, true});
 }
 
 // All of these lines are ill-formed, so test that there is 0 output.
@@ -230,6 +304,18 @@
 
 subsystem #no name
 
+modalias_handling
+modalias_handling enabled enabled
+modalias_handling blah
+
+parallel_restorecon
+parallel_restorecon enabled enabled
+parallel_restorecon blah
+
+external_firmware_handler
+external_firmware_handler blah blah
+external_firmware_handler blah blah blah blah
+
 )";
 
     TestUeventdFile(ueventd_file, {});
diff --git a/init/ueventd_test.cpp b/init/ueventd_test.cpp
index bfdc28e..2d7d2f8 100644
--- a/init/ueventd_test.cpp
+++ b/init/ueventd_test.cpp
@@ -68,7 +68,7 @@
 
 TEST(ueventd, setegid_IsPerThread) {
     if (getuid() != 0) {
-        GTEST_LOG_(INFO) << "Skipping test, must be run as root.";
+        GTEST_SKIP() << "Skipping test, must be run as root.";
         return;
     }
 
@@ -92,11 +92,11 @@
 
 TEST(ueventd, setfscreatecon_IsPerThread) {
     if (getuid() != 0) {
-        GTEST_LOG_(INFO) << "Skipping test, must be run as root.";
+        GTEST_SKIP() << "Skipping test, must be run as root.";
         return;
     }
     if (!is_selinux_enabled() || security_getenforce() == 1) {
-        GTEST_LOG_(INFO) << "Skipping test, SELinux must be enabled and in permissive mode.";
+        GTEST_SKIP() << "Skipping test, SELinux must be enabled and in permissive mode.";
         return;
     }
 
@@ -127,7 +127,7 @@
 
 TEST(ueventd, selabel_lookup_MultiThreaded) {
     if (getuid() != 0) {
-        GTEST_LOG_(INFO) << "Skipping test, must be run as root.";
+        GTEST_SKIP() << "Skipping test, must be run as root.";
         return;
     }
 
diff --git a/init/util.cpp b/init/util.cpp
index 0532375..0ca0da5 100644
--- a/init/util.cpp
+++ b/init/util.cpp
@@ -20,6 +20,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <pwd.h>
+#include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -60,6 +61,8 @@
 
 const std::string kDefaultAndroidDtDir("/proc/device-tree/firmware/android/");
 
+void (*trigger_shutdown)(const std::string& command) = nullptr;
+
 // DecodeUid() - decodes and returns the given string, which can be either the
 // numeric or name representation, into the integer uid or gid.
 Result<uid_t> DecodeUid(const std::string& name) {
@@ -231,15 +234,14 @@
     return -1;
 }
 
-void import_kernel_cmdline(bool in_qemu,
-                           const std::function<void(const std::string&, const std::string&, bool)>& fn) {
+void ImportKernelCmdline(const std::function<void(const std::string&, const std::string&)>& fn) {
     std::string cmdline;
     android::base::ReadFileToString("/proc/cmdline", &cmdline);
 
     for (const auto& entry : android::base::Split(android::base::Trim(cmdline), " ")) {
         std::vector<std::string> pieces = android::base::Split(entry, "=");
         if (pieces.size() == 2) {
-            fn(pieces[0], pieces[1], in_qemu);
+            fn(pieces[0], pieces[1]);
         }
     }
 }
@@ -356,12 +358,11 @@
     // Use the standard procfs-based path by default
     std::string android_dt_dir = kDefaultAndroidDtDir;
     // The platform may specify a custom Android DT path in kernel cmdline
-    import_kernel_cmdline(false,
-                          [&](const std::string& key, const std::string& value, bool in_qemu) {
-                              if (key == "androidboot.android_dt_dir") {
-                                  android_dt_dir = value;
-                              }
-                          });
+    ImportKernelCmdline([&](const std::string& key, const std::string& value) {
+        if (key == "androidboot.android_dt_dir") {
+            android_dt_dir = value;
+        }
+    });
     LOG(INFO) << "Using Android DT directory " << android_dt_dir;
     return android_dt_dir;
 }
@@ -433,6 +434,142 @@
     return {};
 }
 
+static FscryptAction FscryptInferAction(const std::string& dir) {
+    const std::string prefix = "/data/";
+
+    if (!android::base::StartsWith(dir, prefix)) {
+        return FscryptAction::kNone;
+    }
+
+    // Special-case /data/media/obb per b/64566063
+    if (dir == "/data/media/obb") {
+        // Try to set policy on this directory, but if it is non-empty this may fail.
+        return FscryptAction::kAttempt;
+    }
+
+    // Only set policy on first level /data directories
+    // To make this less restrictive, consider using a policy file.
+    // However this is overkill for as long as the policy is simply
+    // to apply a global policy to all /data folders created via makedir
+    if (dir.find_first_of('/', prefix.size()) != std::string::npos) {
+        return FscryptAction::kNone;
+    }
+
+    // Special case various directories that must not be encrypted,
+    // often because their subdirectories must be encrypted.
+    // This isn't a nice way to do this, see b/26641735
+    std::vector<std::string> directories_to_exclude = {
+            "lost+found", "system_ce", "system_de", "misc_ce",     "misc_de",
+            "vendor_ce",  "vendor_de", "media",     "data",        "user",
+            "user_de",    "apex",      "preloads",  "app-staging", "gsi",
+    };
+    for (const auto& d : directories_to_exclude) {
+        if ((prefix + d) == dir) {
+            return FscryptAction::kNone;
+        }
+    }
+    // Empty these directories if policy setting fails.
+    std::vector<std::string> wipe_on_failure = {
+            "rollback", "rollback-observer",  // b/139193659
+    };
+    for (const auto& d : wipe_on_failure) {
+        if ((prefix + d) == dir) {
+            return FscryptAction::kDeleteIfNecessary;
+        }
+    }
+    return FscryptAction::kRequire;
+}
+
+Result<MkdirOptions> ParseMkdir(const std::vector<std::string>& args) {
+    mode_t mode = 0755;
+    Result<uid_t> uid = -1;
+    Result<gid_t> gid = -1;
+    FscryptAction fscrypt_inferred_action = FscryptInferAction(args[1]);
+    FscryptAction fscrypt_action = fscrypt_inferred_action;
+    std::string ref_option = "ref";
+    bool set_option_encryption = false;
+    bool set_option_key = false;
+
+    for (size_t i = 2; i < args.size(); i++) {
+        switch (i) {
+            case 2:
+                mode = std::strtoul(args[2].c_str(), 0, 8);
+                break;
+            case 3:
+                uid = DecodeUid(args[3]);
+                if (!uid) {
+                    return Error()
+                           << "Unable to decode UID for '" << args[3] << "': " << uid.error();
+                }
+                break;
+            case 4:
+                gid = DecodeUid(args[4]);
+                if (!gid) {
+                    return Error()
+                           << "Unable to decode GID for '" << args[4] << "': " << gid.error();
+                }
+                break;
+            default:
+                auto parts = android::base::Split(args[i], "=");
+                if (parts.size() != 2) {
+                    return Error() << "Can't parse option: '" << args[i] << "'";
+                }
+                auto optname = parts[0];
+                auto optval = parts[1];
+                if (optname == "encryption") {
+                    if (set_option_encryption) {
+                        return Error() << "Duplicated option: '" << optname << "'";
+                    }
+                    if (optval == "Require") {
+                        fscrypt_action = FscryptAction::kRequire;
+                    } else if (optval == "None") {
+                        fscrypt_action = FscryptAction::kNone;
+                    } else if (optval == "Attempt") {
+                        fscrypt_action = FscryptAction::kAttempt;
+                    } else if (optval == "DeleteIfNecessary") {
+                        fscrypt_action = FscryptAction::kDeleteIfNecessary;
+                    } else {
+                        return Error() << "Unknown encryption option: '" << optval << "'";
+                    }
+                    set_option_encryption = true;
+                } else if (optname == "key") {
+                    if (set_option_key) {
+                        return Error() << "Duplicated option: '" << optname << "'";
+                    }
+                    if (optval == "ref" || optval == "per_boot_ref") {
+                        ref_option = optval;
+                    } else {
+                        return Error() << "Unknown key option: '" << optval << "'";
+                    }
+                    set_option_key = true;
+                } else {
+                    return Error() << "Unknown option: '" << args[i] << "'";
+                }
+        }
+    }
+    if (set_option_key && fscrypt_action == FscryptAction::kNone) {
+        return Error() << "Key option set but encryption action is none";
+    }
+    const std::string prefix = "/data/";
+    if (StartsWith(args[1], prefix) &&
+        args[1].find_first_of('/', prefix.size()) == std::string::npos) {
+        if (!set_option_encryption) {
+            LOG(WARNING) << "Top-level directory needs encryption action, eg mkdir " << args[1]
+                         << " <mode> <uid> <gid> encryption=Require";
+        }
+        if (fscrypt_action == FscryptAction::kNone) {
+            LOG(INFO) << "Not setting encryption policy on: " << args[1];
+        }
+    }
+    if (fscrypt_action != fscrypt_inferred_action) {
+        LOG(WARNING) << "Inferred action different from explicit one, expected "
+                     << static_cast<int>(fscrypt_inferred_action) << " but got "
+                     << static_cast<int>(fscrypt_action);
+    }
+
+    return MkdirOptions{args[1], mode, *uid, *gid, fscrypt_action, ref_option};
+}
+
 Result<std::pair<int, std::vector<std::string>>> ParseRestorecon(
         const std::vector<std::string>& args) {
     struct flag_type {
@@ -481,7 +618,7 @@
         return;
     }
 
-    InitFatalReboot();
+    InitFatalReboot(SIGABRT);
 }
 
 // The kernel opens /dev/console and uses that fd for stdin/stdout/stderr if there is a serial
diff --git a/init/util.h b/init/util.h
index 4cccefe..ad322d9 100644
--- a/init/util.h
+++ b/init/util.h
@@ -25,6 +25,7 @@
 
 #include <android-base/chrono_utils.h>
 
+#include "fscrypt_init_extensions.h"
 #include "result.h"
 
 using android::base::boot_clock;
@@ -34,6 +35,8 @@
 
 static const char kColdBootDoneProp[] = "ro.cold_boot_done";
 
+extern void (*trigger_shutdown)(const std::string& command);
+
 Result<int> CreateSocket(const std::string& name, int type, bool passcred, mode_t perm, uid_t uid,
                          gid_t gid, const std::string& socketcon);
 
@@ -44,8 +47,7 @@
 
 bool mkdir_recursive(const std::string& pathname, mode_t mode);
 int wait_for_file(const char *filename, std::chrono::nanoseconds timeout);
-void import_kernel_cmdline(bool in_qemu,
-                           const std::function<void(const std::string&, const std::string&, bool)>&);
+void ImportKernelCmdline(const std::function<void(const std::string&, const std::string&)>&);
 bool make_dir(const std::string& path, mode_t mode);
 bool is_dir(const char* pathname);
 Result<std::string> ExpandProps(const std::string& src);
@@ -60,6 +62,17 @@
 bool IsLegalPropertyName(const std::string& name);
 Result<void> IsLegalPropertyValue(const std::string& name, const std::string& value);
 
+struct MkdirOptions {
+    std::string target;
+    mode_t mode;
+    uid_t uid;
+    gid_t gid;
+    FscryptAction fscrypt_action;
+    std::string ref_option;
+};
+
+Result<MkdirOptions> ParseMkdir(const std::vector<std::string>& args);
+
 Result<std::pair<int, std::vector<std::string>>> ParseRestorecon(
         const std::vector<std::string>& args);
 
diff --git a/init/util_test.cpp b/init/util_test.cpp
index 8947256..a8fcc87 100644
--- a/init/util_test.cpp
+++ b/init/util_test.cpp
@@ -61,8 +61,8 @@
 
 TEST(util, ReadFileSymbolicLink) {
     errno = 0;
-    // lrwxrwxrwx 1 root root 13 1970-01-01 00:00 charger -> /sbin/healthd
-    auto file_contents = ReadFile("/charger");
+    // lrw------- 1 root root 23 2008-12-31 19:00 default.prop -> system/etc/prop.default
+    auto file_contents = ReadFile("/default.prop");
     EXPECT_EQ(ELOOP, errno);
     ASSERT_FALSE(file_contents);
     EXPECT_EQ("open() failed: Too many symbolic links encountered",
diff --git a/libappfuse/FuseBridgeLoop.cc b/libappfuse/FuseBridgeLoop.cc
index f1ca446..f71d0c3 100644
--- a/libappfuse/FuseBridgeLoop.cc
+++ b/libappfuse/FuseBridgeLoop.cc
@@ -86,6 +86,7 @@
         const bool proxy_read_ready = last_proxy_events_.events & EPOLLIN;
         const bool proxy_write_ready = last_proxy_events_.events & EPOLLOUT;
 
+        last_state_ = state_;
         last_device_events_.events = 0;
         last_proxy_events_.events = 0;
 
diff --git a/libbacktrace/include/backtrace/BacktraceMap.h b/libbacktrace/include/backtrace/BacktraceMap.h
index f8d5058..e000a00 100644
--- a/libbacktrace/include/backtrace/BacktraceMap.h
+++ b/libbacktrace/include/backtrace/BacktraceMap.h
@@ -79,7 +79,7 @@
       index_++;
       return *this;
     }
-    iterator& operator++(int increment) {
+    const iterator operator++(int increment) {
       index_ += increment;
       return *this;
     }
@@ -87,7 +87,7 @@
       index_--;
       return *this;
     }
-    iterator& operator--(int decrement) {
+    const iterator operator--(int decrement) {
       index_ -= decrement;
       return *this;
     }
diff --git a/libcutils/Android.bp b/libcutils/Android.bp
index b9420d4..334364e 100644
--- a/libcutils/Android.bp
+++ b/libcutils/Android.bp
@@ -197,7 +197,10 @@
 
 cc_defaults {
     name: "libcutils_test_default",
-    srcs: ["sockets_test.cpp"],
+    srcs: [
+        "native_handle_test.cpp",
+        "sockets_test.cpp",
+    ],
 
     target: {
         android: {
@@ -244,6 +247,7 @@
     defaults: ["libcutils_test_default"],
     host_supported: true,
     shared_libs: test_libraries,
+    require_root: true,
 }
 
 cc_test {
@@ -255,6 +259,7 @@
         "libcgrouprc_format",
     ] + test_libraries,
     stl: "libc++_static",
+    require_root: true,
 
     target: {
         android: {
diff --git a/libcutils/ashmem-dev.cpp b/libcutils/ashmem-dev.cpp
index e67b458..340572c 100644
--- a/libcutils/ashmem-dev.cpp
+++ b/libcutils/ashmem-dev.cpp
@@ -23,9 +23,6 @@
  */
 #define LOG_TAG "ashmem"
 
-#ifndef __ANDROID_VNDK__
-#include <dlfcn.h>
-#endif
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/ashmem.h>
@@ -42,11 +39,11 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#include <android-base/file.h>
 #include <android-base/properties.h>
+#include <android-base/strings.h>
 #include <android-base/unique_fd.h>
 
-#define ASHMEM_DEVICE "/dev/ashmem"
-
 /* Will be added to UAPI once upstream change is merged */
 #define F_SEAL_FUTURE_WRITE 0x0010
 
@@ -66,32 +63,6 @@
 static pthread_mutex_t __ashmem_lock = PTHREAD_MUTEX_INITIALIZER;
 
 /*
- * We use ashmemd to enforce that apps don't open /dev/ashmem directly. Vendor
- * code can't access system aidl services per Treble requirements. So we limit
- * ashmemd access to the system variant of libcutils.
- */
-#ifndef __ANDROID_VNDK__
-using openFdType = int (*)();
-
-static openFdType openFd;
-
-openFdType initOpenAshmemFd() {
-    openFdType openFd = nullptr;
-    void* handle = dlopen("libashmemd_client.so", RTLD_NOW);
-    if (!handle) {
-        ALOGE("Failed to dlopen() libashmemd_client.so: %s", dlerror());
-        return openFd;
-    }
-
-    openFd = reinterpret_cast<openFdType>(dlsym(handle, "openAshmemdFd"));
-    if (!openFd) {
-        ALOGE("Failed to dlsym() openAshmemdFd() function: %s", dlerror());
-    }
-    return openFd;
-}
-#endif
-
-/*
  * has_memfd_support() determines if the device can use memfd. memfd support
  * has been there for long time, but certain things in it may be missing.  We
  * check for needed support in it. Also we check if the VNDK version of
@@ -215,25 +186,31 @@
     return memfd_supported;
 }
 
+static std::string get_ashmem_device_path() {
+    static const std::string boot_id_path = "/proc/sys/kernel/random/boot_id";
+    std::string boot_id;
+    if (!android::base::ReadFileToString(boot_id_path, &boot_id)) {
+        ALOGE("Failed to read %s: %s.\n", boot_id_path.c_str(), strerror(errno));
+        return "";
+    };
+    boot_id = android::base::Trim(boot_id);
+
+    return "/dev/ashmem" + boot_id;
+}
+
 /* logistics of getting file descriptor for ashmem */
 static int __ashmem_open_locked()
 {
+    static const std::string ashmem_device_path = get_ashmem_device_path();
+
     int ret;
     struct stat st;
 
-    int fd = -1;
-#ifndef __ANDROID_VNDK__
-    if (!openFd) {
-        openFd = initOpenAshmemFd();
+    if (ashmem_device_path.empty()) {
+        return -1;
     }
 
-    if (openFd) {
-        fd = openFd();
-    }
-#endif
-    if (fd < 0) {
-        fd = TEMP_FAILURE_RETRY(open(ASHMEM_DEVICE, O_RDWR | O_CLOEXEC));
-    }
+    int fd = TEMP_FAILURE_RETRY(open(ashmem_device_path.c_str(), O_RDWR | O_CLOEXEC));
     if (fd < 0) {
         return fd;
     }
@@ -485,11 +462,3 @@
 
     return __ashmem_check_failure(fd, TEMP_FAILURE_RETRY(ioctl(fd, ASHMEM_GET_SIZE, NULL)));
 }
-
-void ashmem_init() {
-#ifndef __ANDROID_VNDK__
-    pthread_mutex_lock(&__ashmem_lock);
-    openFd = initOpenAshmemFd();
-    pthread_mutex_unlock(&__ashmem_lock);
-#endif  //__ANDROID_VNDK__
-}
diff --git a/libcutils/ashmem-host.cpp b/libcutils/ashmem-host.cpp
index 32446d4..2ba1eb0 100644
--- a/libcutils/ashmem-host.cpp
+++ b/libcutils/ashmem-host.cpp
@@ -34,6 +34,29 @@
 
 #include <utils/Compat.h>
 
+static bool ashmem_validate_stat(int fd, struct stat* buf) {
+    int result = fstat(fd, buf);
+    if (result == -1) {
+        return false;
+    }
+
+    /*
+     * Check if this is an "ashmem" region.
+     * TODO: This is very hacky, and can easily break.
+     * We need some reliable indicator.
+     */
+    if (!(buf->st_nlink == 0 && S_ISREG(buf->st_mode))) {
+        errno = ENOTTY;
+        return false;
+    }
+    return true;
+}
+
+int ashmem_valid(int fd) {
+    struct stat buf;
+    return ashmem_validate_stat(fd, &buf);
+}
+
 int ashmem_create_region(const char* /*ignored*/, size_t size) {
     char pattern[PATH_MAX];
     snprintf(pattern, sizeof(pattern), "/tmp/android-ashmem-%d-XXXXXXXXX", getpid());
@@ -65,22 +88,9 @@
 int ashmem_get_size_region(int fd)
 {
     struct stat buf;
-    int result = fstat(fd, &buf);
-    if (result == -1) {
-        return -1;
-    }
-
-    /*
-     * Check if this is an "ashmem" region.
-     * TODO: This is very hacky, and can easily break.
-     * We need some reliable indicator.
-     */
-    if (!(buf.st_nlink == 0 && S_ISREG(buf.st_mode))) {
-        errno = ENOTTY;
+    if (!ashmem_validate_stat(fd, &buf)) {
         return -1;
     }
 
     return buf.st_size;
 }
-
-void ashmem_init() {}
diff --git a/libcutils/fs_config.cpp b/libcutils/fs_config.cpp
index b29638c..2b39ca6 100644
--- a/libcutils/fs_config.cpp
+++ b/libcutils/fs_config.cpp
@@ -84,7 +84,8 @@
     { 00755, AID_ROOT,         AID_ROOT,         0, "system/etc/ppp" },
     { 00755, AID_ROOT,         AID_SHELL,        0, "system/vendor" },
     { 00751, AID_ROOT,         AID_SHELL,        0, "system/xbin" },
-    { 00755, AID_ROOT,         AID_SHELL,        0, "system/apex/*/bin" },
+    { 00751, AID_ROOT,         AID_SHELL,        0, "system/apex/*/bin" },
+    { 00751, AID_ROOT,         AID_SHELL,        0, "system_ext/bin" },
     { 00751, AID_ROOT,         AID_SHELL,        0, "vendor/bin" },
     { 00755, AID_ROOT,         AID_SHELL,        0, "vendor" },
     { 00755, AID_ROOT,         AID_ROOT,         0, 0 },
@@ -161,7 +162,6 @@
     { 00755, AID_ROOT,      AID_SHELL,     0, "system/bin/crash_dump32" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "system/bin/crash_dump64" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "system/bin/debuggerd" },
-    { 00750, AID_ROOT,      AID_ROOT,      0, "system/bin/install-recovery.sh" },
     { 00550, AID_LOGD,      AID_LOGD,      0, "system/bin/logd" },
     { 00700, AID_ROOT,      AID_ROOT,      0, "system/bin/secilc" },
     { 00750, AID_ROOT,      AID_ROOT,      0, "system/bin/uncrypt" },
@@ -173,9 +173,10 @@
     { 00550, AID_ROOT,      AID_SHELL,     0, "system/etc/init.ril" },
     { 00555, AID_ROOT,      AID_ROOT,      0, "system/etc/ppp/*" },
     { 00555, AID_ROOT,      AID_ROOT,      0, "system/etc/rc.*" },
-    { 00440, AID_ROOT,      AID_ROOT,      0, "system/etc/recovery.img" },
+    { 00750, AID_ROOT,      AID_ROOT,      0, "vendor/bin/install-recovery.sh" },
     { 00600, AID_ROOT,      AID_ROOT,      0, "vendor/build.prop" },
     { 00600, AID_ROOT,      AID_ROOT,      0, "vendor/default.prop" },
+    { 00440, AID_ROOT,      AID_ROOT,      0, "vendor/etc/recovery.img" },
     { 00444, AID_ROOT,      AID_ROOT,      0, ven_conf_dir + 1 },
     { 00444, AID_ROOT,      AID_ROOT,      0, ven_conf_file + 1 },
 
@@ -207,6 +208,7 @@
     { 00755, AID_ROOT,      AID_SHELL,     0, "system/bin/*" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "system/xbin/*" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "system/apex/*/bin/*" },
+    { 00755, AID_ROOT,      AID_SHELL,     0, "system_ext/bin/*" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "vendor/bin/*" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "vendor/xbin/*" },
     { 00644, AID_ROOT,      AID_ROOT,      0, 0 },
diff --git a/libcutils/fs_config_test.cpp b/libcutils/fs_config_test.cpp
index 9627152..c6684b4 100644
--- a/libcutils/fs_config_test.cpp
+++ b/libcutils/fs_config_test.cpp
@@ -46,7 +46,7 @@
         // clang-format off
     { true,  "system/lib",             "system/lib/hw",           true  },
     { true,  "vendor/lib",             "system/vendor/lib/hw",    true  },
-    { true,  "system/vendor/lib",      "vendor/lib/hw",           true  },
+    { true,  "system/vendor/lib",      "vendor/lib/hw",           false },
     { true,  "system/vendor/lib",      "system/vendor/lib/hw",    true  },
     { true,  "foo/*/bar/*",            "foo/1/bar/2",             true  },
     { true,  "foo/*/bar/*",            "foo/1/bar",               true  },
@@ -56,13 +56,14 @@
     { false, "vendor/bin/wifi",        "system/vendor/bin/wifi",  true  },
     { false, "vendor/bin/wifi",        "system/vendor/bin/wifi2", false },
     { false, "system/vendor/bin/wifi", "system/vendor/bin/wifi",  true, },
-    { false, "odm/bin/wifi",           "system/odm/bin/wifi",     true  },
-    { false, "oem/bin/wifi",           "system/oem/bin/wifi",     true  },
+    { false, "odm/bin/wifi",           "system/odm/bin/wifi",     false },
+    { false, "odm/bin/wifi",           "vendor/odm/bin/wifi",     true  },
+    { false, "oem/bin/wifi",           "system/oem/bin/wifi",     false },
     { false, "data/bin/wifi",          "system/data/bin/wifi",    false },
     { false, "system/bin/*",           "system/bin/wifi",         true  },
     { false, "vendor/bin/*",           "system/vendor/bin/wifi",  true  },
     { false, "system/bin/*",           "system/bin",              false },
-    { false, "system/vendor/bin/*",    "vendor/bin/wifi",         true  },
+    { false, "system/vendor/bin/*",    "vendor/bin/wifi",         false },
     { false, "foo/*/bar/*",            "foo/1/bar/2",             true  },
     { false, "foo/*/bar/*",            "foo/1/bar",               false },
     { false, "foo/*/bar/*",            "foo/1/bar/2/3",           true  },
diff --git a/libcutils/include/cutils/ashmem.h b/libcutils/include/cutils/ashmem.h
index abc5068..d80caa6 100644
--- a/libcutils/include/cutils/ashmem.h
+++ b/libcutils/include/cutils/ashmem.h
@@ -26,7 +26,6 @@
 int ashmem_pin_region(int fd, size_t offset, size_t len);
 int ashmem_unpin_region(int fd, size_t offset, size_t len);
 int ashmem_get_size_region(int fd);
-void ashmem_init();
 
 #ifdef __cplusplus
 }
diff --git a/libcutils/include/cutils/native_handle.h b/libcutils/include/cutils/native_handle.h
index f6cae36..4f07456 100644
--- a/libcutils/include/cutils/native_handle.h
+++ b/libcutils/include/cutils/native_handle.h
@@ -69,10 +69,11 @@
 
 /*
  * native_handle_create
- * 
+ *
  * creates a native_handle_t and initializes it. must be destroyed with
- * native_handle_delete().
- * 
+ * native_handle_delete(). Note that numFds must be <= NATIVE_HANDLE_MAX_FDS,
+ * numInts must be <= NATIVE_HANDLE_MAX_INTS, and both must be >= 0.
+ *
  */
 native_handle_t* native_handle_create(int numFds, int numInts);
 
diff --git a/libcutils/include/cutils/sockets.h b/libcutils/include/cutils/sockets.h
index 285f150..be21a8f 100644
--- a/libcutils/include/cutils/sockets.h
+++ b/libcutils/include/cutils/sockets.h
@@ -103,14 +103,6 @@
 int socket_close(cutils_socket_t sock);
 
 /*
- * Sets socket receive timeout using SO_RCVTIMEO. Setting |timeout_ms| to 0
- * disables receive timeouts.
- *
- * Return 0 on success.
- */
-int socket_set_receive_timeout(cutils_socket_t sock, int timeout_ms);
-
-/*
  * Returns the local port the socket is bound to or -1 on error.
  */
 int socket_get_local_port(cutils_socket_t sock);
diff --git a/libcutils/include/private/android_filesystem_config.h b/libcutils/include/private/android_filesystem_config.h
index ae9dab5..e1e8230 100644
--- a/libcutils/include/private/android_filesystem_config.h
+++ b/libcutils/include/private/android_filesystem_config.h
@@ -128,6 +128,7 @@
 #define AID_GPU_SERVICE 1072     /* GPU service daemon */
 #define AID_NETWORK_STACK 1073   /* network stack service */
 #define AID_GSID 1074            /* GSI service daemon */
+#define AID_FSVERITY_CERT 1075   /* fs-verity key ownership in keystore */
 /* Changes to this file must be made in AOSP, *not* in internal branches. */
 
 #define AID_SHELL 2000 /* adb and debug shell user */
diff --git a/libcutils/include_vndk/cutils/log.h b/libcutils/include_vndk/cutils/log.h
deleted file mode 100644
index 21dc11e..0000000
--- a/libcutils/include_vndk/cutils/log.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*Special log.h file for VNDK linking modules*/
-/*
- * Copyright (C) 2005-2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
-*/
-#ifndef _LIBS_CUTIL_LOG_H
-#define _LIBS_CUTIL_LOG_H
-
-/* We do not know if developer wanted log/log.h or subset android/log.h */
-#include <log/log.h>
-
-#if defined(__GNUC__)
-#if defined( __clang__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic warning "-W#warnings"
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wpedantic"
-#elif (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR > 9))
-#pragma GCC diagnostic push
-#pragma GCC diagnostic warning "-W#warnings"
-#else
-#pragma GCC diagnostic push
-#pragma GCC diagnostic warning "-Wcpp"
-#endif
-#endif
-
-#warning "Deprecated: don't include cutils/log.h, use either android/log.h or log/log.h"
-
-#if defined(__GNUC__)
-#if defined( __clang__)
-#pragma clang diagnostic pop
-#endif
-#pragma GCC diagnostic pop
-#endif
-
-#endif /* _LIBS_CUTIL_LOG_H */
diff --git a/libcutils/include_vndk/cutils/log.h b/libcutils/include_vndk/cutils/log.h
new file mode 120000
index 0000000..b868d50
--- /dev/null
+++ b/libcutils/include_vndk/cutils/log.h
@@ -0,0 +1 @@
+../../include/cutils/log.h
\ No newline at end of file
diff --git a/libcutils/native_handle.cpp b/libcutils/native_handle.cpp
index b409e5b..5804ab1 100644
--- a/libcutils/native_handle.cpp
+++ b/libcutils/native_handle.cpp
@@ -81,6 +81,8 @@
 }
 
 int native_handle_close(const native_handle_t* h) {
+    if (!h) return 0;
+
     if (h->version != sizeof(native_handle_t)) return -EINVAL;
 
     int saved_errno = errno;
diff --git a/libion/tests/heap_query.cpp b/libcutils/native_handle_test.cpp
similarity index 73%
rename from libion/tests/heap_query.cpp
rename to libcutils/native_handle_test.cpp
index bad3bbf..c1e2f0b 100644
--- a/libion/tests/heap_query.cpp
+++ b/libcutils/native_handle_test.cpp
@@ -14,14 +14,14 @@
  * limitations under the License.
  */
 
+#include <cutils/native_handle.h>
+
 #include <gtest/gtest.h>
-#include "ion_test_fixture.h"
 
-class HeapQuery : public IonTest {};
-
-TEST_F(HeapQuery, AtleastOneHeap) {
-    ASSERT_GT(ion_heaps.size(), 0);
+TEST(native_handle, native_handle_delete) {
+    ASSERT_EQ(0, native_handle_delete(nullptr));
 }
 
-// TODO: Check if we expect some of the default
-// heap types to be present on all devices.
+TEST(native_handle, native_handle_close) {
+    ASSERT_EQ(0, native_handle_close(nullptr));
+}
diff --git a/libcutils/sched_policy_test.cpp b/libcutils/sched_policy_test.cpp
index a321c90..b9e2832 100644
--- a/libcutils/sched_policy_test.cpp
+++ b/libcutils/sched_policy_test.cpp
@@ -107,6 +107,18 @@
 
 TEST(SchedPolicy, get_sched_policy_name) {
     EXPECT_STREQ("bg", get_sched_policy_name(SP_BACKGROUND));
-    EXPECT_STREQ("error", get_sched_policy_name(SchedPolicy(-2)));
-    EXPECT_STREQ("error", get_sched_policy_name(SP_CNT));
+    EXPECT_EQ(nullptr, get_sched_policy_name(SchedPolicy(-2)));
+    EXPECT_EQ(nullptr, get_sched_policy_name(SP_CNT));
+}
+
+TEST(SchedPolicy, get_cpuset_policy_profile_name) {
+    EXPECT_STREQ("CPUSET_SP_BACKGROUND", get_cpuset_policy_profile_name(SP_BACKGROUND));
+    EXPECT_EQ(nullptr, get_cpuset_policy_profile_name(SchedPolicy(-2)));
+    EXPECT_EQ(nullptr, get_cpuset_policy_profile_name(SP_CNT));
+}
+
+TEST(SchedPolicy, get_sched_policy_profile_name) {
+    EXPECT_STREQ("SCHED_SP_BACKGROUND", get_sched_policy_profile_name(SP_BACKGROUND));
+    EXPECT_EQ(nullptr, get_sched_policy_profile_name(SchedPolicy(-2)));
+    EXPECT_EQ(nullptr, get_sched_policy_profile_name(SP_CNT));
 }
diff --git a/libcutils/sockets_test.cpp b/libcutils/sockets_test.cpp
index b762ac1..1fa40bc 100644
--- a/libcutils/sockets_test.cpp
+++ b/libcutils/sockets_test.cpp
@@ -73,25 +73,6 @@
     EXPECT_EQ(0, socket_close(client));
 }
 
-// Tests receive timeout. The timing verification logic must be very coarse to
-// make sure different systems can all pass these tests.
-void TestReceiveTimeout(cutils_socket_t sock) {
-    time_t start_time;
-    char buffer[32];
-
-    // Make sure a 20ms timeout completes in 1 second or less.
-    EXPECT_EQ(0, socket_set_receive_timeout(sock, 20));
-    start_time = time(nullptr);
-    EXPECT_EQ(-1, recv(sock, buffer, sizeof(buffer), 0));
-    EXPECT_LE(difftime(time(nullptr), start_time), 1.0);
-
-    // Make sure a 1250ms timeout takes 1 second or more.
-    EXPECT_EQ(0, socket_set_receive_timeout(sock, 1250));
-    start_time = time(nullptr);
-    EXPECT_EQ(-1, recv(sock, buffer, sizeof(buffer), 0));
-    EXPECT_LE(1.0, difftime(time(nullptr), start_time));
-}
-
 // Tests socket_get_local_port().
 TEST(SocketsTest, TestGetLocalPort) {
     cutils_socket_t server;
@@ -157,32 +138,6 @@
     TestConnectedSockets(handler, client, SOCK_STREAM);
 }
 
-// Tests setting a receive timeout for UDP sockets.
-TEST(SocketsTest, TestUdpReceiveTimeout) {
-    cutils_socket_t sock = socket_inaddr_any_server(0, SOCK_DGRAM);
-    ASSERT_NE(INVALID_SOCKET, sock);
-
-    TestReceiveTimeout(sock);
-
-    EXPECT_EQ(0, socket_close(sock));
-}
-
-// Tests setting a receive timeout for TCP sockets.
-TEST(SocketsTest, TestTcpReceiveTimeout) {
-    cutils_socket_t server = socket_inaddr_any_server(0, SOCK_STREAM);
-    ASSERT_NE(INVALID_SOCKET, server);
-
-    cutils_socket_t client = socket_network_client(
-            "localhost", socket_get_local_port(server), SOCK_STREAM);
-    cutils_socket_t handler = accept(server, nullptr, nullptr);
-    EXPECT_EQ(0, socket_close(server));
-
-    TestReceiveTimeout(handler);
-
-    EXPECT_EQ(0, socket_close(client));
-    EXPECT_EQ(0, socket_close(handler));
-}
-
 // Tests socket_send_buffers() failure.
 TEST(SocketsTest, TestSocketSendBuffersFailure) {
     EXPECT_EQ(-1, socket_send_buffers(INVALID_SOCKET, nullptr, 0));
diff --git a/libcutils/sockets_unix.cpp b/libcutils/sockets_unix.cpp
index 6acdcd8..84663e6 100644
--- a/libcutils/sockets_unix.cpp
+++ b/libcutils/sockets_unix.cpp
@@ -31,13 +31,6 @@
     return close(sock);
 }
 
-int socket_set_receive_timeout(cutils_socket_t sock, int timeout_ms) {
-    timeval tv;
-    tv.tv_sec = timeout_ms / 1000;
-    tv.tv_usec = (timeout_ms % 1000) * 1000;
-    return setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
-}
-
 ssize_t socket_send_buffers(cutils_socket_t sock,
                             const cutils_socket_buffer_t* buffers,
                             size_t num_buffers) {
diff --git a/libcutils/sockets_windows.cpp b/libcutils/sockets_windows.cpp
index df14712..4adb796 100644
--- a/libcutils/sockets_windows.cpp
+++ b/libcutils/sockets_windows.cpp
@@ -54,11 +54,6 @@
     return closesocket(sock);
 }
 
-int socket_set_receive_timeout(cutils_socket_t sock, int timeout_ms) {
-    return setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
-                      reinterpret_cast<char*>(&timeout_ms), sizeof(timeout_ms));
-}
-
 ssize_t socket_send_buffers(cutils_socket_t sock,
                             const cutils_socket_buffer_t* buffers,
                             size_t num_buffers) {
diff --git a/libcutils/trace-dev.cpp b/libcutils/trace-dev.cpp
index 4da8215..bff16c1 100644
--- a/libcutils/trace-dev.cpp
+++ b/libcutils/trace-dev.cpp
@@ -34,12 +34,9 @@
     if (atrace_marker_fd == -1) {
         ALOGE("Error opening trace file: %s (%d)", strerror(errno), errno);
         atrace_enabled_tags = 0;
-        goto done;
+    } else {
+      atrace_enabled_tags = atrace_get_property();
     }
-
-    atrace_enabled_tags = atrace_get_property();
-
-done:
     atomic_store_explicit(&atrace_is_ready, true, memory_order_release);
 }
 
diff --git a/libcutils/uevent.cpp b/libcutils/uevent.cpp
index 721de7c..bf244d2 100644
--- a/libcutils/uevent.cpp
+++ b/libcutils/uevent.cpp
@@ -60,7 +60,7 @@
     struct ucred* cred;
 
     *uid = -1;
-    ssize_t n = recvmsg(socket, &hdr, 0);
+    ssize_t n = TEMP_FAILURE_RETRY(recvmsg(socket, &hdr, 0));
     if (n <= 0) {
         return n;
     }
diff --git a/libgrallocusage/Android.bp b/libgrallocusage/Android.bp
index d27feb9..ce0c3c8 100644
--- a/libgrallocusage/Android.bp
+++ b/libgrallocusage/Android.bp
@@ -20,12 +20,7 @@
         "-Werror",
     ],
     cppflags: [
-        "-Weverything",
-        "-Wno-c++98-compat-pedantic",
-        // Hide errors in headers we include
-        "-Wno-global-constructors",
-        "-Wno-exit-time-destructors",
-        "-Wno-padded",
+        "-Wextra",
     ],
     srcs: ["GrallocUsageConversion.cpp"],
     export_include_dirs: ["include"],
diff --git a/libion/Android.bp b/libion/Android.bp
deleted file mode 100644
index 2f73d92..0000000
--- a/libion/Android.bp
+++ /dev/null
@@ -1,29 +0,0 @@
-cc_library {
-    name: "libion",
-    vendor_available: true,
-    vndk: {
-        enabled: true,
-        support_system_process: true,
-    },
-    srcs: ["ion.c"],
-    shared_libs: ["liblog"],
-    local_include_dirs: [
-        "include",
-        "kernel-headers",
-    ],
-    export_include_dirs: [
-        "include",
-        "kernel-headers",
-    ],
-    cflags: ["-Werror"],
-}
-
-cc_binary {
-    name: "iontest",
-    srcs: ["ion_test.c"],
-    static_libs: ["libion"],
-    shared_libs: ["liblog"],
-    cflags: ["-Werror"],
-}
-
-subdirs = ["tests"]
diff --git a/libion/OWNERS b/libion/OWNERS
deleted file mode 100644
index 143ad2d..0000000
--- a/libion/OWNERS
+++ /dev/null
@@ -1,2 +0,0 @@
-sspatil@google.com
-hridya@google.com
diff --git a/libion/include/ion/ion.h b/libion/include/ion/ion.h
deleted file mode 100644
index a60d24e..0000000
--- a/libion/include/ion/ion.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- *  ion.c
- *
- * Memory Allocator functions for ion
- *
- *   Copyright 2011 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#ifndef __SYS_CORE_ION_H
-#define __SYS_CORE_ION_H
-
-#include <sys/types.h>
-#include <linux/ion.h>
-
-__BEGIN_DECLS
-
-struct ion_handle;
-
-int ion_open();
-int ion_close(int fd);
-int ion_alloc(int fd, size_t len, size_t align, unsigned int heap_mask,
-              unsigned int flags, ion_user_handle_t *handle);
-int ion_alloc_fd(int fd, size_t len, size_t align, unsigned int heap_mask,
-              unsigned int flags, int *handle_fd);
-int ion_sync_fd(int fd, int handle_fd);
-int ion_free(int fd, ion_user_handle_t handle);
-int ion_map(int fd, ion_user_handle_t handle, size_t length, int prot,
-            int flags, off_t offset, unsigned char **ptr, int *map_fd);
-int ion_share(int fd, ion_user_handle_t handle, int *share_fd);
-int ion_import(int fd, int share_fd, ion_user_handle_t *handle);
-
-/**
-  * Add 4.12+ kernel ION interfaces here for forward compatibility
-  * This should be needed till the pre-4.12+ ION interfaces are backported.
-  */
-int ion_query_heap_cnt(int fd, int* cnt);
-int ion_query_get_heaps(int fd, int cnt, void* buffers);
-
-int ion_is_legacy(int fd);
-
-__END_DECLS
-
-#endif /* __SYS_CORE_ION_H */
diff --git a/libion/ion.c b/libion/ion.c
deleted file mode 100644
index 1ecfc78..0000000
--- a/libion/ion.c
+++ /dev/null
@@ -1,224 +0,0 @@
-/*
- *  ion.c
- *
- * Memory Allocator functions for ion
- *
- *   Copyright 2011 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-#define LOG_TAG "ion"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <linux/ion.h>
-#include <stdatomic.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <ion/ion.h>
-#include "ion_4.12.h"
-
-#include <log/log.h>
-
-enum ion_version { ION_VERSION_UNKNOWN, ION_VERSION_MODERN, ION_VERSION_LEGACY };
-
-static atomic_int g_ion_version = ATOMIC_VAR_INIT(ION_VERSION_UNKNOWN);
-
-int ion_is_legacy(int fd) {
-    int version = atomic_load_explicit(&g_ion_version, memory_order_acquire);
-    if (version == ION_VERSION_UNKNOWN) {
-        /**
-          * Check for FREE IOCTL here; it is available only in the old
-          * kernels, not the new ones.
-          */
-        int err = ion_free(fd, (ion_user_handle_t)NULL);
-        version = (err == -ENOTTY) ? ION_VERSION_MODERN : ION_VERSION_LEGACY;
-        atomic_store_explicit(&g_ion_version, version, memory_order_release);
-    }
-    return version == ION_VERSION_LEGACY;
-}
-
-int ion_open() {
-    int fd = open("/dev/ion", O_RDONLY | O_CLOEXEC);
-    if (fd < 0) ALOGE("open /dev/ion failed: %s", strerror(errno));
-
-    return fd;
-}
-
-int ion_close(int fd) {
-    int ret = close(fd);
-    if (ret < 0) return -errno;
-    return ret;
-}
-
-static int ion_ioctl(int fd, int req, void* arg) {
-    int ret = ioctl(fd, req, arg);
-    if (ret < 0) {
-        ALOGE("ioctl %x failed with code %d: %s", req, ret, strerror(errno));
-        return -errno;
-    }
-    return ret;
-}
-
-int ion_alloc(int fd, size_t len, size_t align, unsigned int heap_mask, unsigned int flags,
-              ion_user_handle_t* handle) {
-    int ret = 0;
-
-    if ((handle == NULL) || (!ion_is_legacy(fd))) return -EINVAL;
-
-    struct ion_allocation_data data = {
-        .len = len, .align = align, .heap_id_mask = heap_mask, .flags = flags,
-    };
-
-    ret = ion_ioctl(fd, ION_IOC_ALLOC, &data);
-    if (ret < 0) return ret;
-
-    *handle = data.handle;
-
-    return ret;
-}
-
-int ion_free(int fd, ion_user_handle_t handle) {
-    struct ion_handle_data data = {
-        .handle = handle,
-    };
-    return ion_ioctl(fd, ION_IOC_FREE, &data);
-}
-
-int ion_map(int fd, ion_user_handle_t handle, size_t length, int prot, int flags, off_t offset,
-            unsigned char** ptr, int* map_fd) {
-    if (!ion_is_legacy(fd)) return -EINVAL;
-    int ret;
-    unsigned char* tmp_ptr;
-    struct ion_fd_data data = {
-        .handle = handle,
-    };
-
-    if (map_fd == NULL) return -EINVAL;
-    if (ptr == NULL) return -EINVAL;
-
-    ret = ion_ioctl(fd, ION_IOC_MAP, &data);
-    if (ret < 0) return ret;
-    if (data.fd < 0) {
-        ALOGE("map ioctl returned negative fd");
-        return -EINVAL;
-    }
-    tmp_ptr = mmap(NULL, length, prot, flags, data.fd, offset);
-    if (tmp_ptr == MAP_FAILED) {
-        ALOGE("mmap failed: %s", strerror(errno));
-        return -errno;
-    }
-    *map_fd = data.fd;
-    *ptr = tmp_ptr;
-    return ret;
-}
-
-int ion_share(int fd, ion_user_handle_t handle, int* share_fd) {
-    int ret;
-    struct ion_fd_data data = {
-        .handle = handle,
-    };
-
-    if (!ion_is_legacy(fd)) return -EINVAL;
-    if (share_fd == NULL) return -EINVAL;
-
-    ret = ion_ioctl(fd, ION_IOC_SHARE, &data);
-    if (ret < 0) return ret;
-    if (data.fd < 0) {
-        ALOGE("share ioctl returned negative fd");
-        return -EINVAL;
-    }
-    *share_fd = data.fd;
-    return ret;
-}
-
-int ion_alloc_fd(int fd, size_t len, size_t align, unsigned int heap_mask, unsigned int flags,
-                 int* handle_fd) {
-    ion_user_handle_t handle;
-    int ret;
-
-    if (!handle_fd) return -EINVAL;
-
-    if (!ion_is_legacy(fd)) {
-        struct ion_new_allocation_data data = {
-            .len = len,
-            .heap_id_mask = heap_mask,
-            .flags = flags,
-        };
-
-        ret = ion_ioctl(fd, ION_IOC_NEW_ALLOC, &data);
-        if (ret < 0) return ret;
-        *handle_fd = data.fd;
-    } else {
-        ret = ion_alloc(fd, len, align, heap_mask, flags, &handle);
-        if (ret < 0) return ret;
-        ret = ion_share(fd, handle, handle_fd);
-        ion_free(fd, handle);
-    }
-    return ret;
-}
-
-int ion_import(int fd, int share_fd, ion_user_handle_t* handle) {
-    int ret;
-    struct ion_fd_data data = {
-        .fd = share_fd,
-    };
-
-    if (!ion_is_legacy(fd)) return -EINVAL;
-
-    if (handle == NULL) return -EINVAL;
-
-    ret = ion_ioctl(fd, ION_IOC_IMPORT, &data);
-    if (ret < 0) return ret;
-    *handle = data.handle;
-    return ret;
-}
-
-int ion_sync_fd(int fd, int handle_fd) {
-    struct ion_fd_data data = {
-        .fd = handle_fd,
-    };
-
-    if (!ion_is_legacy(fd)) return -EINVAL;
-
-    return ion_ioctl(fd, ION_IOC_SYNC, &data);
-}
-
-int ion_query_heap_cnt(int fd, int* cnt) {
-    int ret;
-    struct ion_heap_query query;
-
-    if (!cnt) return -EINVAL;
-    memset(&query, 0, sizeof(query));
-
-    ret = ion_ioctl(fd, ION_IOC_HEAP_QUERY, &query);
-    if (ret < 0) return ret;
-
-    *cnt = query.cnt;
-    return ret;
-}
-
-int ion_query_get_heaps(int fd, int cnt, void* buffers) {
-    int ret;
-    struct ion_heap_query query = {
-        .cnt = cnt, .heaps = (uintptr_t)buffers,
-    };
-
-    ret = ion_ioctl(fd, ION_IOC_HEAP_QUERY, &query);
-    return ret;
-}
diff --git a/libion/ion_4.12.h b/libion/ion_4.12.h
deleted file mode 100644
index 614510c..0000000
--- a/libion/ion_4.12.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/****************************************************************************
- ****************************************************************************
- ***
- ***   This header was automatically generated from a Linux kernel header
- ***   of the same name, to make information necessary for userspace to
- ***   call into the kernel available to libc.  It contains only constants,
- ***   structures, and macros generated from the original header, and thus,
- ***   contains no copyrightable information.
- ***
- ***   To edit the content of this header, modify the corresponding
- ***   source file (e.g. under external/kernel-headers/original/) then
- ***   run bionic/libc/kernel/tools/update_all.py
- ***
- ***   Any manual change here will be lost the next time this script will
- ***   be run. You've been warned!
- ***
- ****************************************************************************
- ****************************************************************************/
-#ifndef _UAPI_LINUX_ION_NEW_H
-#define _UAPI_LINUX_ION_NEW_H
-#include <linux/ioctl.h>
-#include <linux/types.h>
-#define ION_NUM_HEAP_IDS (sizeof(unsigned int) * 8)
-struct ion_new_allocation_data {
-  __u64 len;
-  __u32 heap_id_mask;
-  __u32 flags;
-  __u32 fd;
-  __u32 unused;
-};
-#define MAX_HEAP_NAME 32
-struct ion_heap_data {
-  char name[MAX_HEAP_NAME];
-  __u32 type;
-  __u32 heap_id;
-  __u32 reserved0;
-  __u32 reserved1;
-  __u32 reserved2;
-};
-struct ion_heap_query {
-  __u32 cnt;
-  __u32 reserved0;
-  __u64 heaps;
-  __u32 reserved1;
-  __u32 reserved2;
-};
-#define ION_IOC_MAGIC 'I'
-#define ION_IOC_NEW_ALLOC _IOWR(ION_IOC_MAGIC, 0, struct ion_new_allocation_data)
-#define ION_IOC_HEAP_QUERY _IOWR(ION_IOC_MAGIC, 8, struct ion_heap_query)
-#endif
diff --git a/libion/ion_test.c b/libion/ion_test.c
deleted file mode 100644
index f3874ae..0000000
--- a/libion/ion_test.c
+++ /dev/null
@@ -1,289 +0,0 @@
-/*
- *   Copyright 2013 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <getopt.h>
-#include <string.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <sys/mman.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <ion/ion.h>
-#include <linux/ion.h>
-
-size_t len = 1024*1024, align = 0;
-int prot = PROT_READ | PROT_WRITE;
-int map_flags = MAP_SHARED;
-int alloc_flags = 0;
-int heap_mask = 1;
-int test = -1;
-size_t stride;
-
-int _ion_alloc_test(int *fd, ion_user_handle_t *handle)
-{
-    int ret;
-
-    *fd = ion_open();
-    if (*fd < 0)
-        return *fd;
-
-    ret = ion_alloc(*fd, len, align, heap_mask, alloc_flags, handle);
-
-    if (ret)
-        printf("%s failed: %s\n", __func__, strerror(ret));
-    return ret;
-}
-
-void ion_alloc_test()
-{
-    int fd, ret;
-    ion_user_handle_t handle;
-
-    if(_ion_alloc_test(&fd, &handle))
-        return;
-
-    ret = ion_free(fd, handle);
-    if (ret) {
-        printf("%s failed: %s %d\n", __func__, strerror(ret), handle);
-        return;
-    }
-    ion_close(fd);
-    printf("ion alloc test: passed\n");
-}
-
-void ion_map_test()
-{
-    int fd, map_fd, ret;
-    size_t i;
-    ion_user_handle_t handle;
-    unsigned char *ptr;
-
-    if(_ion_alloc_test(&fd, &handle))
-        return;
-
-    ret = ion_map(fd, handle, len, prot, map_flags, 0, &ptr, &map_fd);
-    if (ret)
-        return;
-
-    for (i = 0; i < len; i++) {
-        ptr[i] = (unsigned char)i;
-    }
-    for (i = 0; i < len; i++)
-        if (ptr[i] != (unsigned char)i)
-            printf("%s failed wrote %zu read %d from mapped "
-                   "memory\n", __func__, i, ptr[i]);
-    /* clean up properly */
-    ret = ion_free(fd, handle);
-    ion_close(fd);
-    munmap(ptr, len);
-    close(map_fd);
-
-    _ion_alloc_test(&fd, &handle);
-    close(fd);
-
-#if 0
-    munmap(ptr, len);
-    close(map_fd);
-    ion_close(fd);
-
-    _ion_alloc_test(len, align, flags, &fd, &handle);
-    close(map_fd);
-    ret = ion_map(fd, handle, len, prot, flags, 0, &ptr, &map_fd);
-    /* don't clean up */
-#endif
-}
-
-void ion_share_test()
-
-{
-    ion_user_handle_t handle;
-    int sd[2];
-    int num_fd = 1;
-    struct iovec count_vec = {
-        .iov_base = &num_fd,
-        .iov_len = sizeof num_fd,
-    };
-    char buf[CMSG_SPACE(sizeof(int))];
-    socketpair(AF_UNIX, SOCK_STREAM, 0, sd);
-    if (fork()) {
-        struct msghdr msg = {
-            .msg_control = buf,
-            .msg_controllen = sizeof buf,
-            .msg_iov = &count_vec,
-            .msg_iovlen = 1,
-        };
-
-        struct cmsghdr *cmsg;
-        int fd, share_fd, ret;
-        char *ptr;
-        /* parent */
-        if(_ion_alloc_test(&fd, &handle))
-            return;
-        ret = ion_share(fd, handle, &share_fd);
-        if (ret)
-            printf("share failed %s\n", strerror(errno));
-        ptr = mmap(NULL, len, prot, map_flags, share_fd, 0);
-        if (ptr == MAP_FAILED) {
-            return;
-        }
-        strcpy(ptr, "master");
-        cmsg = CMSG_FIRSTHDR(&msg);
-        cmsg->cmsg_level = SOL_SOCKET;
-        cmsg->cmsg_type = SCM_RIGHTS;
-        cmsg->cmsg_len = CMSG_LEN(sizeof(int));
-        *(int *)CMSG_DATA(cmsg) = share_fd;
-        /* send the fd */
-        printf("master? [%10s] should be [master]\n", ptr);
-        printf("master sending msg 1\n");
-        sendmsg(sd[0], &msg, 0);
-        if (recvmsg(sd[0], &msg, 0) < 0)
-            perror("master recv msg 2");
-        printf("master? [%10s] should be [child]\n", ptr);
-
-        /* send ping */
-        sendmsg(sd[0], &msg, 0);
-        printf("master->master? [%10s]\n", ptr);
-        if (recvmsg(sd[0], &msg, 0) < 0)
-            perror("master recv 1");
-        close(fd);
-        _exit(0);
-    } else {
-        struct cmsghdr *cmsg;
-        char* ptr;
-        int fd, recv_fd;
-        char* child_buf[100];
-        /* child */
-        struct iovec count_vec = {
-            .iov_base = child_buf,
-            .iov_len = sizeof child_buf,
-        };
-
-        struct msghdr child_msg = {
-            .msg_control = buf,
-            .msg_controllen = sizeof buf,
-            .msg_iov = &count_vec,
-            .msg_iovlen = 1,
-        };
-
-        if (recvmsg(sd[1], &child_msg, 0) < 0)
-            perror("child recv msg 1");
-        cmsg = CMSG_FIRSTHDR(&child_msg);
-        if (cmsg == NULL) {
-            printf("no cmsg rcvd in child");
-            return;
-        }
-        recv_fd = *(int*)CMSG_DATA(cmsg);
-        if (recv_fd < 0) {
-            printf("could not get recv_fd from socket");
-            return;
-        }
-        printf("child %d\n", recv_fd);
-        fd = ion_open();
-        ptr = mmap(NULL, len, prot, map_flags, recv_fd, 0);
-        if (ptr == MAP_FAILED) {
-            return;
-        }
-        printf("child? [%10s] should be [master]\n", ptr);
-        strcpy(ptr, "child");
-        printf("child sending msg 2\n");
-        sendmsg(sd[1], &child_msg, 0);
-        close(fd);
-    }
-}
-
-int main(int argc, char* argv[]) {
-    int c;
-    enum tests {
-        ALLOC_TEST = 0, MAP_TEST, SHARE_TEST,
-    };
-
-    while (1) {
-        static struct option opts[] = {
-            {"alloc", no_argument, 0, 'a'},
-            {"alloc_flags", required_argument, 0, 'f'},
-            {"heap_mask", required_argument, 0, 'h'},
-            {"map", no_argument, 0, 'm'},
-            {"share", no_argument, 0, 's'},
-            {"len", required_argument, 0, 'l'},
-            {"align", required_argument, 0, 'g'},
-            {"map_flags", required_argument, 0, 'z'},
-            {"prot", required_argument, 0, 'p'},
-        };
-        int i = 0;
-        c = getopt_long(argc, argv, "af:h:l:mr:st", opts, &i);
-        if (c == -1)
-            break;
-
-        switch (c) {
-        case 'l':
-            len = atol(optarg);
-            break;
-        case 'g':
-            align = atol(optarg);
-            break;
-        case 'z':
-            map_flags = 0;
-            map_flags |= strstr(optarg, "PROT_EXEC") ? PROT_EXEC : 0;
-            map_flags |= strstr(optarg, "PROT_READ") ? PROT_READ: 0;
-            map_flags |= strstr(optarg, "PROT_WRITE") ? PROT_WRITE: 0;
-            map_flags |= strstr(optarg, "PROT_NONE") ? PROT_NONE: 0;
-            break;
-        case 'p':
-            prot = 0;
-            prot |= strstr(optarg, "MAP_PRIVATE") ? MAP_PRIVATE : 0;
-            prot |= strstr(optarg, "MAP_SHARED") ? MAP_SHARED : 0;
-            break;
-        case 'f':
-            alloc_flags = atol(optarg);
-            break;
-        case 'h':
-            heap_mask = atol(optarg);
-            break;
-        case 'a':
-            test = ALLOC_TEST;
-            break;
-        case 'm':
-            test = MAP_TEST;
-            break;
-        case 's':
-            test = SHARE_TEST;
-            break;
-        }
-    }
-    printf("test %d, len %zu, align %zu, map_flags %d, prot %d, heap_mask %d,"
-           " alloc_flags %d\n", test, len, align, map_flags, prot,
-           heap_mask, alloc_flags);
-    switch (test) {
-        case ALLOC_TEST:
-            ion_alloc_test();
-            break;
-        case MAP_TEST:
-            ion_map_test();
-            break;
-        case SHARE_TEST:
-            ion_share_test();
-            break;
-        default:
-            printf("must specify a test (alloc, map, share)\n");
-    }
-    return 0;
-}
diff --git a/libion/kernel-headers/linux/ion.h b/libion/kernel-headers/linux/ion.h
deleted file mode 100644
index 3c28080..0000000
--- a/libion/kernel-headers/linux/ion.h
+++ /dev/null
@@ -1,78 +0,0 @@
-/****************************************************************************
- ****************************************************************************
- ***
- ***   This header was automatically generated from a Linux kernel header
- ***   of the same name, to make information necessary for userspace to
- ***   call into the kernel available to libc.  It contains only constants,
- ***   structures, and macros generated from the original header, and thus,
- ***   contains no copyrightable information.
- ***
- ***   To edit the content of this header, modify the corresponding
- ***   source file (e.g. under external/kernel-headers/original/) then
- ***   run bionic/libc/kernel/tools/update_all.py
- ***
- ***   Any manual change here will be lost the next time this script will
- ***   be run. You've been warned!
- ***
- ****************************************************************************
- ****************************************************************************/
-#ifndef _UAPI_LINUX_ION_H
-#define _UAPI_LINUX_ION_H
-#include <linux/ioctl.h>
-#include <linux/types.h>
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-typedef int ion_user_handle_t;
-enum ion_heap_type {
- ION_HEAP_TYPE_SYSTEM,
- ION_HEAP_TYPE_SYSTEM_CONTIG,
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- ION_HEAP_TYPE_CARVEOUT,
- ION_HEAP_TYPE_CHUNK,
- ION_HEAP_TYPE_DMA,
- ION_HEAP_TYPE_CUSTOM,
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- ION_NUM_HEAPS = 16,
-};
-#define ION_HEAP_SYSTEM_MASK (1 << ION_HEAP_TYPE_SYSTEM)
-#define ION_HEAP_SYSTEM_CONTIG_MASK (1 << ION_HEAP_TYPE_SYSTEM_CONTIG)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define ION_HEAP_CARVEOUT_MASK (1 << ION_HEAP_TYPE_CARVEOUT)
-#define ION_HEAP_TYPE_DMA_MASK (1 << ION_HEAP_TYPE_DMA)
-#define ION_NUM_HEAP_IDS (sizeof(unsigned int) * 8)
-#define ION_FLAG_CACHED 1
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define ION_FLAG_CACHED_NEEDS_SYNC 2
-struct ion_allocation_data {
- size_t len;
- size_t align;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- unsigned int heap_id_mask;
- unsigned int flags;
- ion_user_handle_t handle;
-};
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-struct ion_fd_data {
- ion_user_handle_t handle;
- int fd;
-};
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-struct ion_handle_data {
- ion_user_handle_t handle;
-};
-struct ion_custom_data {
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- unsigned int cmd;
- unsigned long arg;
-};
-#define ION_IOC_MAGIC 'I'
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define ION_IOC_ALLOC _IOWR(ION_IOC_MAGIC, 0,   struct ion_allocation_data)
-#define ION_IOC_FREE _IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data)
-#define ION_IOC_MAP _IOWR(ION_IOC_MAGIC, 2, struct ion_fd_data)
-#define ION_IOC_SHARE _IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define ION_IOC_IMPORT _IOWR(ION_IOC_MAGIC, 5, struct ion_fd_data)
-#define ION_IOC_SYNC _IOWR(ION_IOC_MAGIC, 7, struct ion_fd_data)
-#define ION_IOC_CUSTOM _IOWR(ION_IOC_MAGIC, 6, struct ion_custom_data)
-#endif
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
diff --git a/libion/kernel-headers/linux/ion_test.h b/libion/kernel-headers/linux/ion_test.h
deleted file mode 100644
index 6f3e2a7..0000000
--- a/libion/kernel-headers/linux/ion_test.h
+++ /dev/null
@@ -1,38 +0,0 @@
-/****************************************************************************
- ****************************************************************************
- ***
- ***   This header was automatically generated from a Linux kernel header
- ***   of the same name, to make information necessary for userspace to
- ***   call into the kernel available to libc.  It contains only constants,
- ***   structures, and macros generated from the original header, and thus,
- ***   contains no copyrightable information.
- ***
- ***   To edit the content of this header, modify the corresponding
- ***   source file (e.g. under external/kernel-headers/original/) then
- ***   run bionic/libc/kernel/tools/update_all.py
- ***
- ***   Any manual change here will be lost the next time this script will
- ***   be run. You've been warned!
- ***
- ****************************************************************************
- ****************************************************************************/
-#ifndef _UAPI_LINUX_ION_TEST_H
-#define _UAPI_LINUX_ION_TEST_H
-#include <linux/ioctl.h>
-#include <linux/types.h>
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-struct ion_test_rw_data {
- __u64 ptr;
- __u64 offset;
- __u64 size;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- int write;
- int __padding;
-};
-#define ION_IOC_MAGIC 'I'
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define ION_IOC_TEST_SET_FD   _IO(ION_IOC_MAGIC, 0xf0)
-#define ION_IOC_TEST_DMA_MAPPING   _IOW(ION_IOC_MAGIC, 0xf1, struct ion_test_rw_data)
-#define ION_IOC_TEST_KERNEL_MAPPING   _IOW(ION_IOC_MAGIC, 0xf2, struct ion_test_rw_data)
-#endif
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
diff --git a/libion/original-kernel-headers/linux/ion.h b/libion/original-kernel-headers/linux/ion.h
deleted file mode 100644
index f09e7c1..0000000
--- a/libion/original-kernel-headers/linux/ion.h
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
- * drivers/staging/android/uapi/ion.h
- *
- * Copyright (C) 2011 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef _UAPI_LINUX_ION_H
-#define _UAPI_LINUX_ION_H
-
-#include <linux/ioctl.h>
-#include <linux/types.h>
-
-typedef int ion_user_handle_t;
-
-/**
- * enum ion_heap_types - list of all possible types of heaps
- * @ION_HEAP_TYPE_SYSTEM:	 memory allocated via vmalloc
- * @ION_HEAP_TYPE_SYSTEM_CONTIG: memory allocated via kmalloc
- * @ION_HEAP_TYPE_CARVEOUT:	 memory allocated from a prereserved
- * 				 carveout heap, allocations are physically
- * 				 contiguous
- * @ION_HEAP_TYPE_DMA:		 memory allocated via DMA API
- * @ION_NUM_HEAPS:		 helper for iterating over heaps, a bit mask
- * 				 is used to identify the heaps, so only 32
- * 				 total heap types are supported
- */
-enum ion_heap_type {
-	ION_HEAP_TYPE_SYSTEM,
-	ION_HEAP_TYPE_SYSTEM_CONTIG,
-	ION_HEAP_TYPE_CARVEOUT,
-	ION_HEAP_TYPE_CHUNK,
-	ION_HEAP_TYPE_DMA,
-	ION_HEAP_TYPE_CUSTOM, /* must be last so device specific heaps always
-				 are at the end of this enum */
-	ION_NUM_HEAPS = 16,
-};
-
-#define ION_HEAP_SYSTEM_MASK		(1 << ION_HEAP_TYPE_SYSTEM)
-#define ION_HEAP_SYSTEM_CONTIG_MASK	(1 << ION_HEAP_TYPE_SYSTEM_CONTIG)
-#define ION_HEAP_CARVEOUT_MASK		(1 << ION_HEAP_TYPE_CARVEOUT)
-#define ION_HEAP_TYPE_DMA_MASK		(1 << ION_HEAP_TYPE_DMA)
-
-#define ION_NUM_HEAP_IDS		sizeof(unsigned int) * 8
-
-/**
- * allocation flags - the lower 16 bits are used by core ion, the upper 16
- * bits are reserved for use by the heaps themselves.
- */
-#define ION_FLAG_CACHED 1		/* mappings of this buffer should be
-					   cached, ion will do cache
-					   maintenance when the buffer is
-					   mapped for dma */
-#define ION_FLAG_CACHED_NEEDS_SYNC 2	/* mappings of this buffer will created
-					   at mmap time, if this is set
-					   caches must be managed manually */
-
-/**
- * DOC: Ion Userspace API
- *
- * create a client by opening /dev/ion
- * most operations handled via following ioctls
- *
- */
-
-/**
- * struct ion_allocation_data - metadata passed from userspace for allocations
- * @len:		size of the allocation
- * @align:		required alignment of the allocation
- * @heap_id_mask:	mask of heap ids to allocate from
- * @flags:		flags passed to heap
- * @handle:		pointer that will be populated with a cookie to use to 
- *			refer to this allocation
- *
- * Provided by userspace as an argument to the ioctl
- */
-struct ion_allocation_data {
-	size_t len;
-	size_t align;
-	unsigned int heap_id_mask;
-	unsigned int flags;
-	ion_user_handle_t handle;
-};
-
-/**
- * struct ion_fd_data - metadata passed to/from userspace for a handle/fd pair
- * @handle:	a handle
- * @fd:		a file descriptor representing that handle
- *
- * For ION_IOC_SHARE or ION_IOC_MAP userspace populates the handle field with
- * the handle returned from ion alloc, and the kernel returns the file
- * descriptor to share or map in the fd field.  For ION_IOC_IMPORT, userspace
- * provides the file descriptor and the kernel returns the handle.
- */
-struct ion_fd_data {
-	ion_user_handle_t handle;
-	int fd;
-};
-
-/**
- * struct ion_handle_data - a handle passed to/from the kernel
- * @handle:	a handle
- */
-struct ion_handle_data {
-	ion_user_handle_t handle;
-};
-
-/**
- * struct ion_custom_data - metadata passed to/from userspace for a custom ioctl
- * @cmd:	the custom ioctl function to call
- * @arg:	additional data to pass to the custom ioctl, typically a user
- *		pointer to a predefined structure
- *
- * This works just like the regular cmd and arg fields of an ioctl.
- */
-struct ion_custom_data {
-	unsigned int cmd;
-	unsigned long arg;
-};
-
-#define ION_IOC_MAGIC		'I'
-
-/**
- * DOC: ION_IOC_ALLOC - allocate memory
- *
- * Takes an ion_allocation_data struct and returns it with the handle field
- * populated with the opaque handle for the allocation.
- */
-#define ION_IOC_ALLOC		_IOWR(ION_IOC_MAGIC, 0, \
-				      struct ion_allocation_data)
-
-/**
- * DOC: ION_IOC_FREE - free memory
- *
- * Takes an ion_handle_data struct and frees the handle.
- */
-#define ION_IOC_FREE		_IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data)
-
-/**
- * DOC: ION_IOC_MAP - get a file descriptor to mmap
- *
- * Takes an ion_fd_data struct with the handle field populated with a valid
- * opaque handle.  Returns the struct with the fd field set to a file
- * descriptor open in the current address space.  This file descriptor
- * can then be used as an argument to mmap.
- */
-#define ION_IOC_MAP		_IOWR(ION_IOC_MAGIC, 2, struct ion_fd_data)
-
-/**
- * DOC: ION_IOC_SHARE - creates a file descriptor to use to share an allocation
- *
- * Takes an ion_fd_data struct with the handle field populated with a valid
- * opaque handle.  Returns the struct with the fd field set to a file
- * descriptor open in the current address space.  This file descriptor
- * can then be passed to another process.  The corresponding opaque handle can
- * be retrieved via ION_IOC_IMPORT.
- */
-#define ION_IOC_SHARE		_IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data)
-
-/**
- * DOC: ION_IOC_IMPORT - imports a shared file descriptor
- *
- * Takes an ion_fd_data struct with the fd field populated with a valid file
- * descriptor obtained from ION_IOC_SHARE and returns the struct with the handle
- * filed set to the corresponding opaque handle.
- */
-#define ION_IOC_IMPORT		_IOWR(ION_IOC_MAGIC, 5, struct ion_fd_data)
-
-/**
- * DOC: ION_IOC_SYNC - syncs a shared file descriptors to memory
- *
- * Deprecated in favor of using the dma_buf api's correctly (syncing
- * will happend automatically when the buffer is mapped to a device).
- * If necessary should be used after touching a cached buffer from the cpu,
- * this will make the buffer in memory coherent.
- */
-#define ION_IOC_SYNC		_IOWR(ION_IOC_MAGIC, 7, struct ion_fd_data)
-
-/**
- * DOC: ION_IOC_CUSTOM - call architecture specific ion ioctl
- *
- * Takes the argument of the architecture specific ioctl to call and
- * passes appropriate userdata for that ioctl
- */
-#define ION_IOC_CUSTOM		_IOWR(ION_IOC_MAGIC, 6, struct ion_custom_data)
-
-#endif /* _UAPI_LINUX_ION_H */
diff --git a/libion/original-kernel-headers/linux/ion_4.12.h b/libion/original-kernel-headers/linux/ion_4.12.h
deleted file mode 100644
index 6ae79d4..0000000
--- a/libion/original-kernel-headers/linux/ion_4.12.h
+++ /dev/null
@@ -1,125 +0,0 @@
-/*
- * Adapted from drivers/staging/android/uapi/ion.h
- *
- * Copyright (C) 2011 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef _UAPI_LINUX_ION_NEW_H
-#define _UAPI_LINUX_ION_NEW_H
-
-#include <linux/ioctl.h>
-#include <linux/types.h>
-
-#define ION_NUM_HEAP_IDS (sizeof(unsigned int) * 8)
-
-/**
- * DOC: Ion Userspace API
- *
- * create a client by opening /dev/ion
- * most operations handled via following ioctls
- *
- */
-
-/**
- * struct ion_new_allocation_data - metadata passed from userspace for allocations
- * @len:		size of the allocation
- * @heap_id_mask:	mask of heap ids to allocate from
- * @flags:		flags passed to heap
- * @handle:		pointer that will be populated with a cookie to use to
- *			refer to this allocation
- *
- * Provided by userspace as an argument to the ioctl - added _new to denote
- * this belongs to the new ION interface.
- */
-struct ion_new_allocation_data {
-    __u64 len;
-    __u32 heap_id_mask;
-    __u32 flags;
-    __u32 fd;
-    __u32 unused;
-};
-
-#define MAX_HEAP_NAME 32
-
-/**
- * struct ion_heap_data - data about a heap
- * @name - first 32 characters of the heap name
- * @type - heap type
- * @heap_id - heap id for the heap
- */
-struct ion_heap_data {
-    char name[MAX_HEAP_NAME];
-    __u32 type;
-    __u32 heap_id;
-    __u32 reserved0;
-    __u32 reserved1;
-    __u32 reserved2;
-};
-
-/**
- * struct ion_heap_query - collection of data about all heaps
- * @cnt - total number of heaps to be copied
- * @heaps - buffer to copy heap data
- */
-struct ion_heap_query {
-    __u32 cnt;       /* Total number of heaps to be copied */
-    __u32 reserved0; /* align to 64bits */
-    __u64 heaps;     /* buffer to be populated */
-    __u32 reserved1;
-    __u32 reserved2;
-};
-
-#define ION_IOC_MAGIC 'I'
-
-/**
- * DOC: ION_IOC_NEW_ALLOC - allocate memory
- *
- * Takes an ion_allocation_data struct and returns it with the handle field
- * populated with the opaque handle for the allocation.
- * TODO: This IOCTL will clash by design; however, only one of
- *  ION_IOC_ALLOC or ION_IOC_NEW_ALLOC paths will be exercised,
- *  so this should not conflict.
- */
-#define ION_IOC_NEW_ALLOC _IOWR(ION_IOC_MAGIC, 0, struct ion_new_allocation_data)
-
-/**
- * DOC: ION_IOC_FREE - free memory
- *
- * Takes an ion_handle_data struct and frees the handle.
- *
- * #define ION_IOC_FREE		_IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data)
- * This will come from the older kernels, so don't redefine here
- */
-
-/**
- * DOC: ION_IOC_SHARE - creates a file descriptor to use to share an allocation
- *
- * Takes an ion_fd_data struct with the handle field populated with a valid
- * opaque handle.  Returns the struct with the fd field set to a file
- * descriptor open in the current address space.  This file descriptor
- * can then be passed to another process.  The corresponding opaque handle can
- * be retrieved via ION_IOC_IMPORT.
- *
- * #define ION_IOC_SHARE		_IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data)
- * This will come from the older kernels, so don't redefine here
- */
-
-/**
- * DOC: ION_IOC_HEAP_QUERY - information about available heaps
- *
- * Takes an ion_heap_query structure and populates information about
- * available Ion heaps.
- */
-#define ION_IOC_HEAP_QUERY _IOWR(ION_IOC_MAGIC, 8, struct ion_heap_query)
-
-#endif /* _UAPI_LINUX_ION_NEW_H */
diff --git a/libion/original-kernel-headers/linux/ion_test.h b/libion/original-kernel-headers/linux/ion_test.h
deleted file mode 100644
index ffef06f..0000000
--- a/libion/original-kernel-headers/linux/ion_test.h
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * drivers/staging/android/uapi/ion.h
- *
- * Copyright (C) 2011 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef _UAPI_LINUX_ION_TEST_H
-#define _UAPI_LINUX_ION_TEST_H
-
-#include <linux/ioctl.h>
-#include <linux/types.h>
-
-/**
- * struct ion_test_rw_data - metadata passed to the kernel to read handle
- * @ptr:	a pointer to an area at least as large as size
- * @offset:	offset into the ion buffer to start reading
- * @size:	size to read or write
- * @write:	1 to write, 0 to read
- */
-struct ion_test_rw_data {
-	__u64 ptr;
-	__u64 offset;
-	__u64 size;
-	int write;
-	int __padding;
-};
-
-#define ION_IOC_MAGIC		'I'
-
-/**
- * DOC: ION_IOC_TEST_SET_DMA_BUF - attach a dma buf to the test driver
- *
- * Attaches a dma buf fd to the test driver.  Passing a second fd or -1 will
- * release the first fd.
- */
-#define ION_IOC_TEST_SET_FD \
-			_IO(ION_IOC_MAGIC, 0xf0)
-
-/**
- * DOC: ION_IOC_TEST_DMA_MAPPING - read or write memory from a handle as DMA
- *
- * Reads or writes the memory from a handle using an uncached mapping.  Can be
- * used by unit tests to emulate a DMA engine as close as possible.  Only
- * expected to be used for debugging and testing, may not always be available.
- */
-#define ION_IOC_TEST_DMA_MAPPING \
-			_IOW(ION_IOC_MAGIC, 0xf1, struct ion_test_rw_data)
-
-/**
- * DOC: ION_IOC_TEST_KERNEL_MAPPING - read or write memory from a handle
- *
- * Reads or writes the memory from a handle using a kernel mapping.  Can be
- * used by unit tests to test heap map_kernel functions.  Only expected to be
- * used for debugging and testing, may not always be available.
- */
-#define ION_IOC_TEST_KERNEL_MAPPING \
-			_IOW(ION_IOC_MAGIC, 0xf2, struct ion_test_rw_data)
-
-
-#endif /* _UAPI_LINUX_ION_H */
diff --git a/libion/tests/Android.bp b/libion/tests/Android.bp
deleted file mode 100644
index d3b4688..0000000
--- a/libion/tests/Android.bp
+++ /dev/null
@@ -1,32 +0,0 @@
-//
-// Copyright (C) 2013 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-cc_test {
-    name: "ion-unit-tests",
-    cflags: [
-        "-g",
-        "-Wno-missing-field-initializers",
-    ],
-    shared_libs: ["libion"],
-    srcs: [
-        "allocate_test.cpp",
-        "exit_test.cpp",
-    	"heap_query.cpp",
-        "invalid_values_test.cpp",
-        "ion_test_fixture.cpp",
-        "map_test.cpp",
-    ],
-}
diff --git a/libion/tests/allocate_test.cpp b/libion/tests/allocate_test.cpp
deleted file mode 100644
index 5ed01bb..0000000
--- a/libion/tests/allocate_test.cpp
+++ /dev/null
@@ -1,146 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/mman.h>
-#include <memory>
-
-#include <gtest/gtest.h>
-
-#include <ion/ion.h>
-#include "ion_test_fixture.h"
-
-class Allocate : public IonTest {};
-
-TEST_F(Allocate, Allocate) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            int fd;
-            ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), 0, &fd));
-            ASSERT_TRUE(fd != 0);
-            ASSERT_EQ(close(fd), 0);  // free the buffer
-        }
-    }
-}
-
-TEST_F(Allocate, AllocateCached) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            int fd;
-            ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), ION_FLAG_CACHED, &fd));
-            ASSERT_TRUE(fd != 0);
-            ASSERT_EQ(close(fd), 0);  // free the buffer
-        }
-    }
-}
-
-TEST_F(Allocate, AllocateCachedNeedsSync) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            int fd;
-            ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id),
-                                      ION_FLAG_CACHED_NEEDS_SYNC, &fd));
-            ASSERT_TRUE(fd != 0);
-            ASSERT_EQ(close(fd), 0);  // free the buffer
-        }
-    }
-}
-
-TEST_F(Allocate, RepeatedAllocate) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            int fd;
-
-            for (unsigned int i = 0; i < 1024; i++) {
-                SCOPED_TRACE(::testing::Message() << "iteration " << i);
-                ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), 0, &fd));
-                ASSERT_TRUE(fd != 0);
-                ASSERT_EQ(close(fd), 0);  // free the buffer
-            }
-        }
-    }
-}
-
-TEST_F(Allocate, Large) {
-    for (const auto& heap : ion_heaps) {
-        SCOPED_TRACE(::testing::Message()
-                     << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-        int fd;
-        ASSERT_EQ(-ENOMEM,
-                  ion_alloc_fd(ionfd, 3UL * 1024 * 1024 * 1024, 0, (1 << heap.heap_id), 0, &fd));
-    }
-}
-
-// Make sure all heaps always return zeroed pages
-TEST_F(Allocate, Zeroed) {
-    auto zeroes_ptr = std::make_unique<char[]>(4096);
-
-    for (const auto& heap : ion_heaps) {
-        SCOPED_TRACE(::testing::Message()
-                     << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-        int fds[16];
-        for (unsigned int i = 0; i < 16; i++) {
-            int map_fd = -1;
-
-            ASSERT_EQ(0, ion_alloc_fd(ionfd, 4096, 0, (1 << heap.heap_id), 0, &map_fd));
-            ASSERT_GE(map_fd, 0);
-
-            void* ptr = NULL;
-            ptr = mmap(NULL, 4096, PROT_WRITE, MAP_SHARED, map_fd, 0);
-            ASSERT_TRUE(ptr != NULL);
-
-            memset(ptr, 0xaa, 4096);
-
-            ASSERT_EQ(0, munmap(ptr, 4096));
-            fds[i] = map_fd;
-        }
-
-        for (unsigned int i = 0; i < 16; i++) {
-            ASSERT_EQ(0, close(fds[i]));
-        }
-
-        int new_ionfd = ion_open();
-        int map_fd = -1;
-
-        ASSERT_EQ(0, ion_alloc_fd(new_ionfd, 4096, 0, (1 << heap.heap_id), 0, &map_fd));
-        ASSERT_GE(map_fd, 0);
-
-        void* ptr = NULL;
-        ptr = mmap(NULL, 4096, PROT_READ, MAP_SHARED, map_fd, 0);
-        ASSERT_TRUE(ptr != NULL);
-
-        ASSERT_EQ(0, memcmp(ptr, zeroes_ptr.get(), 4096));
-
-        ASSERT_EQ(0, munmap(ptr, 4096));
-        ASSERT_EQ(0, close(map_fd));
-        ASSERT_EQ(0, ion_close(new_ionfd));
-    }
-}
diff --git a/libion/tests/exit_test.cpp b/libion/tests/exit_test.cpp
deleted file mode 100644
index f312389..0000000
--- a/libion/tests/exit_test.cpp
+++ /dev/null
@@ -1,227 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/mman.h>
-
-#include <gtest/gtest.h>
-
-#include <ion/ion.h>
-
-#include "ion_test_fixture.h"
-
-class Exit : public IonTest {};
-
-TEST_F(Exit, WithAllocFd) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            EXPECT_EXIT(
-                    {
-                        int handle_fd = -1;
-
-                        ASSERT_EQ(0,
-                                  ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), 0, &handle_fd));
-                        ASSERT_NE(-1, handle_fd);
-                        exit(0);
-                    },
-                    ::testing::ExitedWithCode(0), "");
-        }
-    }
-}
-
-TEST_F(Exit, WithRepeatedAllocFd) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            for (unsigned int i = 0; i < 1024; i++) {
-                SCOPED_TRACE(::testing::Message()
-                             << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-                SCOPED_TRACE(::testing::Message() << "size " << size);
-                ASSERT_EXIT(
-                        {
-                            int handle_fd = -1;
-
-                            ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), 0,
-                                                      &handle_fd));
-                            ASSERT_NE(-1, handle_fd);
-                            exit(0);
-                        },
-                        ::testing::ExitedWithCode(0), "")
-                        << "failed on heap " << heap.name << ":" << heap.type << ":" << heap.heap_id
-                        << " and size " << size << " on iteration " << i;
-            }
-        }
-    }
-}
-
-TEST_F(Exit, WithMapping) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            EXPECT_EXIT(
-                    {
-                        int map_fd = -1;
-
-                        ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), 0, &map_fd));
-                        ASSERT_GE(map_fd, 0);
-
-                        void* ptr;
-                        ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-                        ASSERT_TRUE(ptr != NULL);
-                        exit(0);
-                    },
-                    ::testing::ExitedWithCode(0), "");
-        }
-    }
-}
-
-TEST_F(Exit, WithPartialMapping) {
-    static const size_t allocationSizes[] = {64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            EXPECT_EXIT(
-                    {
-                        int map_fd = -1;
-
-                        ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), 0, &map_fd));
-                        ASSERT_GE(map_fd, 0);
-
-                        void* ptr;
-                        ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-                        ASSERT_TRUE(ptr != NULL);
-
-                        ASSERT_EQ(0, munmap(ptr, size / 2));
-                        exit(0);
-                    },
-                    ::testing::ExitedWithCode(0), "");
-        }
-    }
-}
-
-TEST_F(Exit, WithMappingCached) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            EXPECT_EXIT(
-                    {
-                        int map_fd = -1;
-
-                        ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id),
-                                                  ION_FLAG_CACHED, &map_fd));
-                        ASSERT_GE(map_fd, 0);
-
-                        void* ptr;
-                        ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-                        ASSERT_TRUE(ptr != NULL);
-                        exit(0);
-                    },
-                    ::testing::ExitedWithCode(0), "");
-        }
-    }
-}
-
-TEST_F(Exit, WithPartialMappingCached) {
-    static const size_t allocationSizes[] = {64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            EXPECT_EXIT(
-                    {
-                        int map_fd = -1;
-
-                        ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id),
-                                                  ION_FLAG_CACHED, &map_fd));
-                        ASSERT_GE(map_fd, 0);
-
-                        void* ptr;
-                        ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-                        ASSERT_TRUE(ptr != NULL);
-
-                        ASSERT_EQ(0, munmap(ptr, size / 2));
-                        exit(0);
-                    },
-                    ::testing::ExitedWithCode(0), "");
-        }
-    }
-}
-
-TEST_F(Exit, WithMappingNeedsSync) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            EXPECT_EXIT(
-                    {
-                        int map_fd = -1;
-
-                        ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id),
-                                                  ION_FLAG_CACHED | ION_FLAG_CACHED_NEEDS_SYNC,
-                                                  &map_fd));
-                        ASSERT_GE(map_fd, 0);
-
-                        void* ptr;
-                        ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-                        ASSERT_TRUE(ptr != NULL);
-                        exit(0);
-                    },
-                    ::testing::ExitedWithCode(0), "");
-        }
-    }
-}
-
-TEST_F(Exit, WithPartialMappingNeedsSync) {
-    static const size_t allocationSizes[] = {64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            EXPECT_EXIT(
-                    {
-                        int map_fd = -1;
-
-                        ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id),
-                                                  ION_FLAG_CACHED | ION_FLAG_CACHED_NEEDS_SYNC,
-                                                  &map_fd));
-                        ASSERT_GE(map_fd, 0);
-
-                        void* ptr;
-                        ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-                        ASSERT_TRUE(ptr != NULL);
-
-                        ASSERT_EQ(0, munmap(ptr, size / 2));
-                        exit(0);
-                    },
-                    ::testing::ExitedWithCode(0), "");
-        }
-    }
-}
diff --git a/libion/tests/invalid_values_test.cpp b/libion/tests/invalid_values_test.cpp
deleted file mode 100644
index 48fcd72..0000000
--- a/libion/tests/invalid_values_test.cpp
+++ /dev/null
@@ -1,86 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/mman.h>
-
-#include <memory>
-#include <vector>
-
-#include <gtest/gtest.h>
-
-#include <ion/ion.h>
-#include "ion_test_fixture.h"
-
-class InvalidValues : public IonTest {};
-
-TEST_F(InvalidValues, ion_close) {
-    EXPECT_EQ(-EBADF, ion_close(-1));
-}
-
-TEST_F(InvalidValues, ion_alloc_fd) {
-    int fd;
-    // no heaps
-    EXPECT_EQ(-ENODEV, ion_alloc_fd(ionfd, 4096, 0, 0, 0, &fd));
-    for (const auto& heap : ion_heaps) {
-        // invalid ion_fd
-        int ret = ion_alloc_fd(0, 4096, 0, (1 << heap.heap_id), 0, &fd);
-        EXPECT_TRUE(ret == -EINVAL || ret == -ENOTTY);
-        // invalid ion_fd
-        EXPECT_EQ(-EBADF, ion_alloc_fd(-1, 4096, 0, (1 << heap.heap_id), 0, &fd));
-        SCOPED_TRACE(::testing::Message()
-                     << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-        // zero size
-        EXPECT_EQ(-EINVAL, ion_alloc_fd(ionfd, 0, 0, (1 << heap.heap_id), 0, &fd));
-        // too large size
-        EXPECT_EQ(-EINVAL, ion_alloc_fd(ionfd, -1, 0, (1 << heap.heap_id), 0, &fd));
-        // bad alignment
-        // TODO: Current userspace and kernel code completely ignores alignment. So this
-        // test is going to fail. We need to completely remove alignment from the API.
-        // All memory by default is always page aligned. OR actually pass the alignment
-        // down into the kernel and make kernel respect the alignment.
-        // EXPECT_EQ(-EINVAL, ion_alloc_fd(ionfd, 4096, -1, (1 << heap.heap_id), 0, &fd));
-
-        // NULL fd
-        EXPECT_EQ(-EINVAL, ion_alloc_fd(ionfd, 4096, 0, (1 << heap.heap_id), 0, nullptr));
-    }
-}
-
-TEST_F(InvalidValues, ion_query_heap_cnt) {
-    // NULL count
-    EXPECT_EQ(-EINVAL, ion_query_heap_cnt(ionfd, nullptr));
-
-    int heap_count;
-    // bad fd
-    EXPECT_EQ(-EBADF, ion_query_heap_cnt(-1, &heap_count));
-}
-
-TEST_F(InvalidValues, ion_query_get_heaps) {
-    int heap_count;
-    ASSERT_EQ(0, ion_query_heap_cnt(ionfd, &heap_count));
-    ASSERT_GT(heap_count, 0);
-
-    // nullptr buffers, still returns success but without
-    // the ion_heap_data.
-    EXPECT_EQ(0, ion_query_get_heaps(ionfd, heap_count, nullptr));
-
-    std::unique_ptr<struct ion_heap_data[]> heaps =
-            std::make_unique<struct ion_heap_data[]>(heap_count);
-    // bad fd
-    EXPECT_EQ(-EBADF, ion_query_get_heaps(-1, heap_count, heaps.get()));
-
-    // invalid heap data pointer
-    EXPECT_EQ(-EFAULT, ion_query_get_heaps(ionfd, heap_count, reinterpret_cast<void*>(0xdeadf00d)));
-}
diff --git a/libion/tests/ion_4.12.h b/libion/tests/ion_4.12.h
deleted file mode 100644
index 614510c..0000000
--- a/libion/tests/ion_4.12.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/****************************************************************************
- ****************************************************************************
- ***
- ***   This header was automatically generated from a Linux kernel header
- ***   of the same name, to make information necessary for userspace to
- ***   call into the kernel available to libc.  It contains only constants,
- ***   structures, and macros generated from the original header, and thus,
- ***   contains no copyrightable information.
- ***
- ***   To edit the content of this header, modify the corresponding
- ***   source file (e.g. under external/kernel-headers/original/) then
- ***   run bionic/libc/kernel/tools/update_all.py
- ***
- ***   Any manual change here will be lost the next time this script will
- ***   be run. You've been warned!
- ***
- ****************************************************************************
- ****************************************************************************/
-#ifndef _UAPI_LINUX_ION_NEW_H
-#define _UAPI_LINUX_ION_NEW_H
-#include <linux/ioctl.h>
-#include <linux/types.h>
-#define ION_NUM_HEAP_IDS (sizeof(unsigned int) * 8)
-struct ion_new_allocation_data {
-  __u64 len;
-  __u32 heap_id_mask;
-  __u32 flags;
-  __u32 fd;
-  __u32 unused;
-};
-#define MAX_HEAP_NAME 32
-struct ion_heap_data {
-  char name[MAX_HEAP_NAME];
-  __u32 type;
-  __u32 heap_id;
-  __u32 reserved0;
-  __u32 reserved1;
-  __u32 reserved2;
-};
-struct ion_heap_query {
-  __u32 cnt;
-  __u32 reserved0;
-  __u64 heaps;
-  __u32 reserved1;
-  __u32 reserved2;
-};
-#define ION_IOC_MAGIC 'I'
-#define ION_IOC_NEW_ALLOC _IOWR(ION_IOC_MAGIC, 0, struct ion_new_allocation_data)
-#define ION_IOC_HEAP_QUERY _IOWR(ION_IOC_MAGIC, 8, struct ion_heap_query)
-#endif
diff --git a/libion/tests/ion_test_fixture.cpp b/libion/tests/ion_test_fixture.cpp
deleted file mode 100644
index 935fe5c..0000000
--- a/libion/tests/ion_test_fixture.cpp
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <gtest/gtest.h>
-#include <ion/ion.h>
-
-#include "ion_test_fixture.h"
-
-IonTest::IonTest() : ionfd(-1), ion_heaps() {}
-
-void IonTest::SetUp() {
-    ionfd = ion_open();
-    ASSERT_GE(ionfd, 0);
-
-    int heap_count;
-    int ret = ion_query_heap_cnt(ionfd, &heap_count);
-    ASSERT_EQ(ret, 0);
-    ASSERT_GT(heap_count, 0);
-
-    ion_heaps.resize(heap_count, {});
-    ret = ion_query_get_heaps(ionfd, heap_count, ion_heaps.data());
-    ASSERT_EQ(ret, 0);
-}
-
-void IonTest::TearDown() {
-    ion_close(ionfd);
-}
diff --git a/libion/tests/ion_test_fixture.h b/libion/tests/ion_test_fixture.h
deleted file mode 100644
index 4f254b8..0000000
--- a/libion/tests/ion_test_fixture.h
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef ION_TEST_FIXTURE_H_
-#define ION_TEST_FIXTURE_H_
-
-#include <gtest/gtest.h>
-#include <vector>
-#include "ion_4.12.h"
-
-using ::testing::Test;
-
-class IonTest : public virtual Test {
-  public:
-    IonTest();
-    virtual ~IonTest(){};
-    virtual void SetUp();
-    virtual void TearDown();
-    int ionfd;
-    std::vector<struct ion_heap_data> ion_heaps;
-};
-
-#endif /* ION_TEST_FIXTURE_H_ */
diff --git a/libion/tests/map_test.cpp b/libion/tests/map_test.cpp
deleted file mode 100644
index f1b47b7..0000000
--- a/libion/tests/map_test.cpp
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/mman.h>
-#include <unistd.h>
-
-#include <gtest/gtest.h>
-
-#include <ion/ion.h>
-#include "ion_test_fixture.h"
-
-class Map : public IonTest {};
-
-TEST_F(Map, MapFd) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            int map_fd = -1;
-
-            ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), 0, &map_fd));
-            ASSERT_GE(map_fd, 0);
-
-            void* ptr;
-            ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-            ASSERT_TRUE(ptr != NULL);
-            ASSERT_EQ(0, close(map_fd));
-
-            memset(ptr, 0xaa, size);
-
-            ASSERT_EQ(0, munmap(ptr, size));
-        }
-    }
-}
-
-TEST_F(Map, MapOffset) {
-    for (const auto& heap : ion_heaps) {
-        SCOPED_TRACE(::testing::Message()
-                     << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-        int map_fd = -1;
-
-        ASSERT_EQ(0, ion_alloc_fd(ionfd, getpagesize() * 2, 0, (1 << heap.heap_id), 0, &map_fd));
-        ASSERT_GE(map_fd, 0);
-
-        unsigned char* ptr;
-        ptr = (unsigned char*)mmap(NULL, getpagesize() * 2, PROT_READ | PROT_WRITE, MAP_SHARED,
-                                   map_fd, 0);
-        ASSERT_TRUE(ptr != NULL);
-
-        memset(ptr, 0, getpagesize());
-        memset(ptr + getpagesize(), 0xaa, getpagesize());
-
-        ASSERT_EQ(0, munmap(ptr, getpagesize() * 2));
-
-        ptr = (unsigned char*)mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE, MAP_SHARED, map_fd,
-                                   getpagesize());
-        ASSERT_TRUE(ptr != NULL);
-        ASSERT_EQ(ptr[0], 0xaa);
-        ASSERT_EQ(ptr[getpagesize() - 1], 0xaa);
-        ASSERT_EQ(0, munmap(ptr, getpagesize()));
-        ASSERT_EQ(0, close(map_fd));
-    }
-}
-
-TEST_F(Map, MapCached) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            int map_fd = -1;
-            unsigned int flags = ION_FLAG_CACHED;
-
-            ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), flags, &map_fd));
-            ASSERT_GE(map_fd, 0);
-
-            void* ptr;
-            ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-            ASSERT_TRUE(ptr != NULL);
-            ASSERT_EQ(0, close(map_fd));
-
-            memset(ptr, 0xaa, size);
-
-            ASSERT_EQ(0, munmap(ptr, size));
-        }
-    }
-}
-
-TEST_F(Map, MapCachedNeedsSync) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            int map_fd = -1;
-            unsigned int flags = ION_FLAG_CACHED | ION_FLAG_CACHED_NEEDS_SYNC;
-
-            ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), flags, &map_fd));
-            ASSERT_GE(map_fd, 0);
-
-            void* ptr;
-            ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-            ASSERT_TRUE(ptr != NULL);
-            ASSERT_EQ(0, close(map_fd));
-
-            memset(ptr, 0xaa, size);
-
-            ASSERT_EQ(0, munmap(ptr, size));
-        }
-    }
-}
diff --git a/libkeyutils/Android.bp b/libkeyutils/Android.bp
index dda491a..b388e95 100644
--- a/libkeyutils/Android.bp
+++ b/libkeyutils/Android.bp
@@ -16,17 +16,3 @@
     srcs: ["keyutils_test.cpp"],
     test_suites: ["device-tests"],
 }
-
-cc_binary {
-    name: "mini-keyctl",
-    srcs: [
-        "mini_keyctl.cpp",
-        "mini_keyctl_utils.cpp"
-    ],
-    shared_libs: [
-        "libbase",
-        "libkeyutils",
-        "liblog",
-    ],
-    cflags: ["-Werror", "-Wall", "-Wextra", "-fexceptions"],
-}
diff --git a/libkeyutils/mini_keyctl.cpp b/libkeyutils/mini_keyctl.cpp
deleted file mode 100644
index fe89e62..0000000
--- a/libkeyutils/mini_keyctl.cpp
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * A tool loads keys to keyring.
- */
-
-#include "mini_keyctl_utils.h"
-
-#include <error.h>
-#include <stdio.h>
-#include <unistd.h>
-
-#include <android-base/parseint.h>
-
-static void Usage(int exit_code) {
-  fprintf(stderr, "usage: mini-keyctl <action> [args,]\n");
-  fprintf(stderr, "       mini-keyctl add <type> <desc> <data> <keyring>\n");
-  fprintf(stderr, "       mini-keyctl padd <type> <desc> <keyring>\n");
-  fprintf(stderr, "       mini-keyctl unlink <key> <keyring>\n");
-  fprintf(stderr, "       mini-keyctl restrict_keyring <keyring>\n");
-  fprintf(stderr, "       mini-keyctl security <key>\n");
-  _exit(exit_code);
-}
-
-static key_serial_t parseKeyOrDie(const char* str) {
-  key_serial_t key;
-  if (!android::base::ParseInt(str, &key)) {
-    error(1 /* exit code */, 0 /* errno */, "Unparsable key: '%s'\n", str);
-  }
-  return key;
-}
-
-int main(int argc, const char** argv) {
-  if (argc < 2) Usage(1);
-  const std::string action = argv[1];
-
-  if (action == "add") {
-    if (argc != 6) Usage(1);
-    std::string type = argv[2];
-    std::string desc = argv[3];
-    std::string data = argv[4];
-    std::string keyring = argv[5];
-    return Add(type, desc, data, keyring);
-  } else if (action == "padd") {
-    if (argc != 5) Usage(1);
-    std::string type = argv[2];
-    std::string desc = argv[3];
-    std::string keyring = argv[4];
-    return Padd(type, desc, keyring);
-  } else if (action == "restrict_keyring") {
-    if (argc != 3) Usage(1);
-    std::string keyring = argv[2];
-    return RestrictKeyring(keyring);
-  } else if (action == "unlink") {
-    if (argc != 4) Usage(1);
-    key_serial_t key = parseKeyOrDie(argv[2]);
-    const std::string keyring = argv[3];
-    return Unlink(key, keyring);
-  } else if (action == "security") {
-    if (argc != 3) Usage(1);
-    const char* key_str = argv[2];
-    key_serial_t key = parseKeyOrDie(key_str);
-    std::string context = RetrieveSecurityContext(key);
-    if (context.empty()) {
-      perror(key_str);
-      return 1;
-    }
-    fprintf(stderr, "%s\n", context.c_str());
-    return 0;
-  } else {
-    fprintf(stderr, "Unrecognized action: %s\n", action.c_str());
-    Usage(1);
-  }
-
-  return 0;
-}
diff --git a/libkeyutils/mini_keyctl/Android.bp b/libkeyutils/mini_keyctl/Android.bp
new file mode 100644
index 0000000..a04a3db
--- /dev/null
+++ b/libkeyutils/mini_keyctl/Android.bp
@@ -0,0 +1,27 @@
+cc_library_static {
+    name: "libmini_keyctl_static",
+    srcs: [
+        "mini_keyctl_utils.cpp"
+    ],
+    shared_libs: [
+        "libbase",
+        "libkeyutils",
+    ],
+    cflags: ["-Werror", "-Wall", "-Wextra"],
+    export_include_dirs: ["."],
+}
+
+cc_binary {
+    name: "mini-keyctl",
+    srcs: [
+        "mini_keyctl.cpp",
+    ],
+    static_libs: [
+        "libmini_keyctl_static",
+    ],
+    shared_libs: [
+        "libbase",
+        "libkeyutils",
+    ],
+    cflags: ["-Werror", "-Wall", "-Wextra"],
+}
diff --git a/libkeyutils/mini_keyctl/mini_keyctl.cpp b/libkeyutils/mini_keyctl/mini_keyctl.cpp
new file mode 100644
index 0000000..8aace9a
--- /dev/null
+++ b/libkeyutils/mini_keyctl/mini_keyctl.cpp
@@ -0,0 +1,178 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * A tool loads keys to keyring.
+ */
+
+#include <dirent.h>
+#include <errno.h>
+#include <error.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <iostream>
+#include <iterator>
+#include <string>
+
+#include <android-base/file.h>
+#include <android-base/parseint.h>
+#include <keyutils.h>
+#include <mini_keyctl_utils.h>
+
+constexpr int kMaxCertSize = 4096;
+
+static void Usage(int exit_code) {
+  fprintf(stderr, "usage: mini-keyctl <action> [args,]\n");
+  fprintf(stderr, "       mini-keyctl add <type> <desc> <data> <keyring>\n");
+  fprintf(stderr, "       mini-keyctl padd <type> <desc> <keyring>\n");
+  fprintf(stderr, "       mini-keyctl unlink <key> <keyring>\n");
+  fprintf(stderr, "       mini-keyctl restrict_keyring <keyring>\n");
+  fprintf(stderr, "       mini-keyctl security <key>\n");
+  _exit(exit_code);
+}
+
+static key_serial_t parseKeyOrDie(const char* str) {
+  key_serial_t key;
+  if (!android::base::ParseInt(str, &key)) {
+    error(1 /* exit code */, 0 /* errno */, "Unparsable key: '%s'\n", str);
+  }
+  return key;
+}
+
+int Unlink(key_serial_t key, const std::string& keyring) {
+  key_serial_t keyring_id = android::GetKeyringId(keyring);
+  if (keyctl_unlink(key, keyring_id) < 0) {
+    error(1, errno, "Failed to unlink key %x from keyring %s", key, keyring.c_str());
+    return 1;
+  }
+  return 0;
+}
+
+int Add(const std::string& type, const std::string& desc, const std::string& data,
+        const std::string& keyring) {
+  if (data.size() > kMaxCertSize) {
+    error(1, 0, "Certificate too large");
+    return 1;
+  }
+
+  key_serial_t keyring_id = android::GetKeyringId(keyring);
+  key_serial_t key = add_key(type.c_str(), desc.c_str(), data.c_str(), data.size(), keyring_id);
+
+  if (key < 0) {
+    error(1, errno, "Failed to add key");
+    return 1;
+  }
+
+  std::cout << key << std::endl;
+  return 0;
+}
+
+int Padd(const std::string& type, const std::string& desc, const std::string& keyring) {
+  key_serial_t keyring_id = android::GetKeyringId(keyring);
+
+  // read from stdin to get the certificates
+  std::istreambuf_iterator<char> begin(std::cin), end;
+  std::string data(begin, end);
+
+  if (data.size() > kMaxCertSize) {
+    error(1, 0, "Certificate too large");
+    return 1;
+  }
+
+  key_serial_t key = add_key(type.c_str(), desc.c_str(), data.c_str(), data.size(), keyring_id);
+
+  if (key < 0) {
+    error(1, errno, "Failed to add key");
+    return 1;
+  }
+
+  std::cout << key << std::endl;
+  return 0;
+}
+
+int RestrictKeyring(const std::string& keyring) {
+  key_serial_t keyring_id = android::GetKeyringId(keyring);
+  if (keyctl_restrict_keyring(keyring_id, nullptr, nullptr) < 0) {
+    error(1, errno, "Cannot restrict keyring '%s'", keyring.c_str());
+    return 1;
+  }
+  return 0;
+}
+
+std::string RetrieveSecurityContext(key_serial_t key) {
+  // Simply assume this size is enough in practice.
+  const int kMaxSupportedSize = 256;
+  std::string context;
+  context.resize(kMaxSupportedSize);
+  long retval = keyctl_get_security(key, context.data(), kMaxSupportedSize);
+  if (retval < 0) {
+    error(1, errno, "Cannot get security context of key %x", key);
+    return std::string();
+  }
+  if (retval > kMaxSupportedSize) {
+    error(1, 0, "The key has unexpectedly long security context than %d", kMaxSupportedSize);
+    return std::string();
+  }
+  context.resize(retval);
+  return context;
+}
+
+int main(int argc, const char** argv) {
+  if (argc < 2) Usage(1);
+  const std::string action = argv[1];
+
+  if (action == "add") {
+    if (argc != 6) Usage(1);
+    std::string type = argv[2];
+    std::string desc = argv[3];
+    std::string data = argv[4];
+    std::string keyring = argv[5];
+    return Add(type, desc, data, keyring);
+  } else if (action == "padd") {
+    if (argc != 5) Usage(1);
+    std::string type = argv[2];
+    std::string desc = argv[3];
+    std::string keyring = argv[4];
+    return Padd(type, desc, keyring);
+  } else if (action == "restrict_keyring") {
+    if (argc != 3) Usage(1);
+    std::string keyring = argv[2];
+    return RestrictKeyring(keyring);
+  } else if (action == "unlink") {
+    if (argc != 4) Usage(1);
+    key_serial_t key = parseKeyOrDie(argv[2]);
+    const std::string keyring = argv[3];
+    return Unlink(key, keyring);
+  } else if (action == "security") {
+    if (argc != 3) Usage(1);
+    const char* key_str = argv[2];
+    key_serial_t key = parseKeyOrDie(key_str);
+    std::string context = RetrieveSecurityContext(key);
+    if (context.empty()) {
+      perror(key_str);
+      return 1;
+    }
+    fprintf(stderr, "%s\n", context.c_str());
+    return 0;
+  } else {
+    fprintf(stderr, "Unrecognized action: %s\n", action.c_str());
+    Usage(1);
+  }
+
+  return 0;
+}
diff --git a/libkeyutils/mini_keyctl/mini_keyctl_utils.cpp b/libkeyutils/mini_keyctl/mini_keyctl_utils.cpp
new file mode 100644
index 0000000..fb9503f
--- /dev/null
+++ b/libkeyutils/mini_keyctl/mini_keyctl_utils.cpp
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <mini_keyctl_utils.h>
+
+#include <fstream>
+#include <iterator>
+#include <sstream>
+#include <string>
+#include <vector>
+
+#include <android-base/logging.h>
+#include <android-base/parseint.h>
+
+namespace android {
+
+namespace {
+
+std::vector<std::string> SplitBySpace(const std::string& s) {
+  std::istringstream iss(s);
+  return std::vector<std::string>{std::istream_iterator<std::string>{iss},
+                                  std::istream_iterator<std::string>{}};
+}
+
+}  // namespace
+
+// Find the keyring id. request_key(2) only finds keys in the process, session or thread keyring
+// hierarchy, but not internal keyring of a kernel subsystem (e.g. .fs-verity). To support all
+// cases, this function looks up a keyring's ID by parsing /proc/keys. The keyring description may
+// contain other information in the descritption section depending on the key type, only the first
+// word in the keyring description is used for searching.
+key_serial_t GetKeyringId(const std::string& keyring_desc) {
+  // If the keyring id is already a hex number, directly convert it to keyring id
+  key_serial_t keyring_id;
+  if (android::base::ParseInt(keyring_desc.c_str(), &keyring_id)) {
+    return keyring_id;
+  }
+
+  // Only keys allowed by SELinux rules will be shown here.
+  std::ifstream proc_keys_file("/proc/keys");
+  if (!proc_keys_file.is_open()) {
+    PLOG(ERROR) << "Failed to open /proc/keys";
+    return -1;
+  }
+
+  std::string line;
+  while (getline(proc_keys_file, line)) {
+    std::vector<std::string> tokens = SplitBySpace(line);
+    if (tokens.size() < 9) {
+      continue;
+    }
+    std::string key_id = "0x" + tokens[0];
+    std::string key_type = tokens[7];
+    // The key description may contain space.
+    std::string key_desc_prefix = tokens[8];
+    // The prefix has a ":" at the end
+    std::string key_desc_pattern = keyring_desc + ":";
+    if (key_type != "keyring" || key_desc_prefix != key_desc_pattern) {
+      continue;
+    }
+    if (!android::base::ParseInt(key_id.c_str(), &keyring_id)) {
+      LOG(ERROR) << "Unexpected key format in /proc/keys: " << key_id;
+      return -1;
+    }
+    return keyring_id;
+  }
+  return -1;
+}
+
+}  // namespace android
diff --git a/libmeminfo/vts/vts_meminfo_test.cpp b/libkeyutils/mini_keyctl/mini_keyctl_utils.h
similarity index 68%
copy from libmeminfo/vts/vts_meminfo_test.cpp
copy to libkeyutils/mini_keyctl/mini_keyctl_utils.h
index 3193c31..cc31d29 100644
--- a/libmeminfo/vts/vts_meminfo_test.cpp
+++ b/libkeyutils/mini_keyctl/mini_keyctl_utils.h
@@ -14,18 +14,15 @@
  * limitations under the License.
  */
 
-#include <gtest/gtest.h>
+#ifndef _MINI_KEYCTL_MINI_KEYCTL_UTILS_H_
+#define _MINI_KEYCTL_MINI_KEYCTL_UTILS_H_
 
-#include <meminfo/procmeminfo.h>
+#include <string>
+
+#include <keyutils.h>
 
 namespace android {
-namespace meminfo {
-
-// /proc/<pid>/smaps_rollup support is required.
-TEST(SmapsRollup, IsSupported) {
-    // Use init's pid for this test since it's the only known pid.
-    ASSERT_TRUE(IsSmapsRollupSupported(1));
-}
-
-}  // namespace meminfo
+key_serial_t GetKeyringId(const std::string& keyring_desc);
 }  // namespace android
+
+#endif  // _MINI_KEYCTL_MINI_KEYCTL_UTILS_H_
diff --git a/libkeyutils/mini_keyctl_utils.cpp b/libkeyutils/mini_keyctl_utils.cpp
deleted file mode 100644
index 79b4680..0000000
--- a/libkeyutils/mini_keyctl_utils.cpp
+++ /dev/null
@@ -1,164 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <mini_keyctl_utils.h>
-
-#include <dirent.h>
-#include <errno.h>
-#include <error.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <fstream>
-#include <iostream>
-#include <iterator>
-#include <sstream>
-#include <string>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/parseint.h>
-#include <android-base/properties.h>
-#include <android-base/strings.h>
-#include <keyutils.h>
-
-static constexpr int kMaxCertSize = 4096;
-
-static std::vector<std::string> SplitBySpace(const std::string& s) {
-  std::istringstream iss(s);
-  return std::vector<std::string>{std::istream_iterator<std::string>{iss},
-                                  std::istream_iterator<std::string>{}};
-}
-
-// Find the keyring id. Because request_key(2) syscall is not available or the key is
-// kernel keyring, the id is looked up from /proc/keys. The keyring description may contain other
-// information in the descritption section depending on the key type, only the first word in the
-// keyring description is used for searching.
-static key_serial_t GetKeyringIdOrDie(const std::string& keyring_desc) {
-  // If the keyring id is already a hex number, directly convert it to keyring id
-  key_serial_t keyring_id;
-  if (android::base::ParseInt(keyring_desc.c_str(), &keyring_id)) {
-    return keyring_id;
-  }
-
-  // Only keys allowed by SELinux rules will be shown here.
-  std::ifstream proc_keys_file("/proc/keys");
-  if (!proc_keys_file.is_open()) {
-    error(1, errno, "Failed to open /proc/keys");
-    return -1;
-  }
-
-  std::string line;
-  while (getline(proc_keys_file, line)) {
-    std::vector<std::string> tokens = SplitBySpace(line);
-    if (tokens.size() < 9) {
-      continue;
-    }
-    std::string key_id = "0x" + tokens[0];
-    std::string key_type = tokens[7];
-    // The key description may contain space.
-    std::string key_desc_prefix = tokens[8];
-    // The prefix has a ":" at the end
-    std::string key_desc_pattern = keyring_desc + ":";
-    if (key_type != "keyring" || key_desc_prefix != key_desc_pattern) {
-      continue;
-    }
-    if (!android::base::ParseInt(key_id.c_str(), &keyring_id)) {
-      error(1, 0, "Unexpected key format in /proc/keys: %s", key_id.c_str());
-      return -1;
-    }
-    return keyring_id;
-  }
-  return -1;
-}
-
-int Unlink(key_serial_t key, const std::string& keyring) {
-  key_serial_t keyring_id = GetKeyringIdOrDie(keyring);
-  if (keyctl_unlink(key, keyring_id) < 0) {
-    error(1, errno, "Failed to unlink key %x from keyring %s", key, keyring.c_str());
-    return 1;
-  }
-  return 0;
-}
-
-int Add(const std::string& type, const std::string& desc, const std::string& data,
-        const std::string& keyring) {
-  if (data.size() > kMaxCertSize) {
-    error(1, 0, "Certificate too large");
-    return 1;
-  }
-
-  key_serial_t keyring_id = GetKeyringIdOrDie(keyring);
-  key_serial_t key = add_key(type.c_str(), desc.c_str(), data.c_str(), data.size(), keyring_id);
-
-  if (key < 0) {
-    error(1, errno, "Failed to add key");
-    return 1;
-  }
-
-  std::cout << key << std::endl;
-  return 0;
-}
-
-int Padd(const std::string& type, const std::string& desc, const std::string& keyring) {
-  key_serial_t keyring_id = GetKeyringIdOrDie(keyring);
-
-  // read from stdin to get the certificates
-  std::istreambuf_iterator<char> begin(std::cin), end;
-  std::string data(begin, end);
-
-  if (data.size() > kMaxCertSize) {
-    error(1, 0, "Certificate too large");
-    return 1;
-  }
-
-  key_serial_t key = add_key(type.c_str(), desc.c_str(), data.c_str(), data.size(), keyring_id);
-
-  if (key < 0) {
-    error(1, errno, "Failed to add key");
-    return 1;
-  }
-
-  std::cout << key << std::endl;
-  return 0;
-}
-
-int RestrictKeyring(const std::string& keyring) {
-  key_serial_t keyring_id = GetKeyringIdOrDie(keyring);
-  if (keyctl_restrict_keyring(keyring_id, nullptr, nullptr) < 0) {
-    error(1, errno, "Cannot restrict keyring '%s'", keyring.c_str());
-    return 1;
-  }
-  return 0;
-}
-
-std::string RetrieveSecurityContext(key_serial_t key) {
-  // Simply assume this size is enough in practice.
-  const int kMaxSupportedSize = 256;
-  std::string context;
-  context.resize(kMaxSupportedSize);
-  long retval = keyctl_get_security(key, context.data(), kMaxSupportedSize);
-  if (retval < 0) {
-    error(1, errno, "Cannot get security context of key %x", key);
-    return std::string();
-  }
-  if (retval > kMaxSupportedSize) {
-    error(1, 0, "The key has unexpectedly long security context than %d", kMaxSupportedSize);
-    return std::string();
-  }
-  context.resize(retval);
-  return context;
-}
diff --git a/libkeyutils/mini_keyctl_utils.h b/libkeyutils/mini_keyctl_utils.h
deleted file mode 100644
index 3616831..0000000
--- a/libkeyutils/mini_keyctl_utils.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "include/keyutils.h"
-
-#include <string>
-
-// Add key to a keyring. Returns non-zero if error happens.
-int Add(const std::string& type, const std::string& desc, const std::string& data,
-        const std::string& keyring);
-
-// Add key from stdin to a keyring. Returns non-zero if error happens.
-int Padd(const std::string& type, const std::string& desc, const std::string& keyring);
-
-// Removes the link from a keyring to a key if exists. Return non-zero if error happens.
-int Unlink(key_serial_t key, const std::string& keyring);
-
-// Apply key-linking to a keyring. Return non-zero if error happens.
-int RestrictKeyring(const std::string& keyring);
-
-// Retrieves a key's security context. Return the context string, or empty string on error.
-std::string RetrieveSecurityContext(key_serial_t key);
diff --git a/liblog/Android.bp b/liblog/Android.bp
index 53d3ab3..656d4dd 100644
--- a/liblog/Android.bp
+++ b/liblog/Android.bp
@@ -15,8 +15,6 @@
 //
 
 liblog_sources = [
-    "config_read.cpp",
-    "config_write.cpp",
     "log_event_list.cpp",
     "log_event_write.cpp",
     "logger_lock.cpp",
@@ -24,11 +22,9 @@
     "logger_read.cpp",
     "logger_write.cpp",
     "logprint.cpp",
-    "stderr_write.cpp",
 ]
 liblog_host_sources = [
     "fake_log_device.cpp",
-    "fake_writer.cpp",
 ]
 liblog_target_sources = [
     "event_tag_map.cpp",
@@ -108,8 +104,15 @@
         versions: ["10000"],
     },
 
+    // TODO(tomcherry): Renable this before release branch is cut
+    header_abi_checker: {
+        enabled: false,
+    },
+
     cflags: [
+        "-Wall",
         "-Werror",
+        "-Wextra",
         // This is what we want to do:
         //  liblog_cflags := $(shell \
         //   sed -n \
diff --git a/liblog/README.md b/liblog/README.md
index 98bee9f..871399a 100644
--- a/liblog/README.md
+++ b/liblog/README.md
@@ -96,11 +96,6 @@
 
     int android_log_destroy(android_log_context *ctx)
 
-    #include <log/log_transport.h>
-
-    int android_set_log_transport(int transport_flag)
-    int android_get_log_transport()
-
 Description
 -----------
 
@@ -144,11 +139,6 @@
 that was used when opening the sub-log.  It is recommended to open the log `ANDROID_LOG_RDONLY` in
 these cases.
 
-`android_set_log_transport()` selects transport filters.  Argument is either `LOGGER_DEFAULT`,
-`LOGGER_LOGD`, or `LOGGER_NULL`. Log to logger daemon for default or logd, or drop contents on floor
-respectively.  `Both android_set_log_transport()` and `android_get_log_transport()` return the
-current transport mask, or a negative errno for any problems.
-
 Errors
 ------
 
diff --git a/liblog/README.protocol.md b/liblog/README.protocol.md
new file mode 100644
index 0000000..fef29c9
--- /dev/null
+++ b/liblog/README.protocol.md
@@ -0,0 +1,49 @@
+# liblog -> logd
+
+The data that liblog sends to logd is represented below.
+
+    struct {
+        android_log_header_t header;
+        union {
+           struct {
+                char     prio;
+                char     tag[...];
+                char     message[...];
+            } string;
+            struct {
+                android_event_header_t event_header;
+                android_event_*_t      payload[...];
+            } binary;
+        };
+    };
+
+The payload, excluding the header, has a max size of LOGGER_ENTRY_MAX_PAYLOAD.
+
+## header
+
+The header is added immediately before sending the log message to logd.
+
+## `string` payload
+
+The `string` part of the union is for normal buffers (main, system, radio, etc) and consists of a
+single character priority, followed by a variable length null terminated string for the tag, and
+finally a variable length null terminated string for the message.
+
+This payload is used for the `__android_log_buf_write()` family of functions.
+
+## `binary` payload
+
+The `binary` part of the union is for binary buffers (events, security, etc) and consists of an
+android_event_header_t struct followed by a variable number of android_event_*_t
+(android_event_list_t, android_event_int_t, etc) structs.
+
+If multiple android_event_*_t elements are present, then they must be in a list and the first
+element in payload must be an android_event_list_t.
+
+This payload is used for the `__android_log_bwrite()` family of functions. It is additionally used
+for `android_log_write_list()` and the related functions that manipulate event lists.
+
+# logd -> liblog
+
+logd sends a `logger_entry` struct to liblog followed by the payload. The payload is identical to
+the payloads defined above. The max size of the entire message from logd is LOGGER_ENTRY_MAX_LEN.
diff --git a/liblog/config_read.cpp b/liblog/config_read.cpp
deleted file mode 100644
index 3139f78..0000000
--- a/liblog/config_read.cpp
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <log/log_transport.h>
-
-#include "config_read.h"
-#include "logger.h"
-
-struct listnode __android_log_transport_read = {&__android_log_transport_read,
-                                                &__android_log_transport_read};
-struct listnode __android_log_persist_read = {&__android_log_persist_read,
-                                              &__android_log_persist_read};
-
-static void __android_log_add_transport(struct listnode* list,
-                                        struct android_log_transport_read* transport) {
-  uint32_t i;
-
-  /* Try to keep one functioning transport for each log buffer id */
-  for (i = LOG_ID_MIN; i < LOG_ID_MAX; i++) {
-    struct android_log_transport_read* transp;
-
-    if (list_empty(list)) {
-      if (!transport->available || ((*transport->available)(static_cast<log_id_t>(i)) >= 0)) {
-        list_add_tail(list, &transport->node);
-        return;
-      }
-    } else {
-      read_transport_for_each(transp, list) {
-        if (!transp->available) {
-          return;
-        }
-        if (((*transp->available)(static_cast<log_id_t>(i)) < 0) &&
-            (!transport->available || ((*transport->available)(static_cast<log_id_t>(i)) >= 0))) {
-          list_add_tail(list, &transport->node);
-          return;
-        }
-      }
-    }
-  }
-}
-
-void __android_log_config_read() {
-#if (FAKE_LOG_DEVICE == 0)
-  if ((__android_log_transport == LOGGER_DEFAULT) || (__android_log_transport & LOGGER_LOGD)) {
-    extern struct android_log_transport_read logdLoggerRead;
-    extern struct android_log_transport_read pmsgLoggerRead;
-
-    __android_log_add_transport(&__android_log_transport_read, &logdLoggerRead);
-    __android_log_add_transport(&__android_log_persist_read, &pmsgLoggerRead);
-  }
-#endif
-}
-
-void __android_log_config_read_close() {
-  struct android_log_transport_read* transport;
-  struct listnode* n;
-
-  read_transport_for_each_safe(transport, n, &__android_log_transport_read) {
-    list_remove(&transport->node);
-  }
-  read_transport_for_each_safe(transport, n, &__android_log_persist_read) {
-    list_remove(&transport->node);
-  }
-}
diff --git a/liblog/config_read.h b/liblog/config_read.h
deleted file mode 100644
index 212b8a0..0000000
--- a/liblog/config_read.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <cutils/list.h>
-
-#include "log_portability.h"
-
-__BEGIN_DECLS
-
-extern struct listnode __android_log_transport_read;
-extern struct listnode __android_log_persist_read;
-
-#define read_transport_for_each(transp, transports)                           \
-  for ((transp) = node_to_item((transports)->next,                            \
-                               struct android_log_transport_read, node);      \
-       ((transp) != node_to_item((transports),                                \
-                                 struct android_log_transport_read, node)) && \
-       ((transp) != node_to_item((transp)->node.next,                         \
-                                 struct android_log_transport_read, node));   \
-       (transp) = node_to_item((transp)->node.next,                           \
-                               struct android_log_transport_read, node))
-
-#define read_transport_for_each_safe(transp, n, transports)                   \
-  for ((transp) = node_to_item((transports)->next,                            \
-                               struct android_log_transport_read, node),      \
-      (n) = (transp)->node.next;                                              \
-       ((transp) != node_to_item((transports),                                \
-                                 struct android_log_transport_read, node)) && \
-       ((transp) !=                                                           \
-        node_to_item((n), struct android_log_transport_read, node));          \
-       (transp) = node_to_item((n), struct android_log_transport_read, node), \
-      (n) = (transp)->node.next)
-
-void __android_log_config_read();
-void __android_log_config_read_close();
-
-__END_DECLS
diff --git a/liblog/config_write.cpp b/liblog/config_write.cpp
deleted file mode 100644
index d454379..0000000
--- a/liblog/config_write.cpp
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <log/log_transport.h>
-
-#include "config_write.h"
-#include "logger.h"
-
-struct listnode __android_log_transport_write = {&__android_log_transport_write,
-                                                 &__android_log_transport_write};
-struct listnode __android_log_persist_write = {&__android_log_persist_write,
-                                               &__android_log_persist_write};
-
-static void __android_log_add_transport(struct listnode* list,
-                                        struct android_log_transport_write* transport) {
-  uint32_t i;
-
-  /* Try to keep one functioning transport for each log buffer id */
-  for (i = LOG_ID_MIN; i < LOG_ID_MAX; i++) {
-    struct android_log_transport_write* transp;
-
-    if (list_empty(list)) {
-      if (!transport->available || ((*transport->available)(static_cast<log_id_t>(i)) >= 0)) {
-        list_add_tail(list, &transport->node);
-        return;
-      }
-    } else {
-      write_transport_for_each(transp, list) {
-        if (!transp->available) {
-          return;
-        }
-        if (((*transp->available)(static_cast<log_id_t>(i)) < 0) &&
-            (!transport->available || ((*transport->available)(static_cast<log_id_t>(i)) >= 0))) {
-          list_add_tail(list, &transport->node);
-          return;
-        }
-      }
-    }
-  }
-}
-
-void __android_log_config_write() {
-  if ((__android_log_transport == LOGGER_DEFAULT) || (__android_log_transport & LOGGER_LOGD)) {
-#if (FAKE_LOG_DEVICE == 0)
-    extern struct android_log_transport_write logdLoggerWrite;
-    extern struct android_log_transport_write pmsgLoggerWrite;
-
-    __android_log_add_transport(&__android_log_transport_write, &logdLoggerWrite);
-    __android_log_add_transport(&__android_log_persist_write, &pmsgLoggerWrite);
-#else
-    extern struct android_log_transport_write fakeLoggerWrite;
-
-    __android_log_add_transport(&__android_log_transport_write, &fakeLoggerWrite);
-#endif
-  }
-
-  if (__android_log_transport & LOGGER_STDERR) {
-    extern struct android_log_transport_write stderrLoggerWrite;
-
-    /*
-     * stderr logger should be primary if we can be the only one, or if
-     * already in the primary list.  Otherwise land in the persist list.
-     * Remember we can be called here if we are already initialized.
-     */
-    if (list_empty(&__android_log_transport_write)) {
-      __android_log_add_transport(&__android_log_transport_write, &stderrLoggerWrite);
-    } else {
-      struct android_log_transport_write* transp;
-      write_transport_for_each(transp, &__android_log_transport_write) {
-        if (transp == &stderrLoggerWrite) {
-          return;
-        }
-      }
-      __android_log_add_transport(&__android_log_persist_write, &stderrLoggerWrite);
-    }
-  }
-}
-
-void __android_log_config_write_close() {
-  struct android_log_transport_write* transport;
-  struct listnode* n;
-
-  write_transport_for_each_safe(transport, n, &__android_log_transport_write) {
-    transport->logMask = 0;
-    list_remove(&transport->node);
-  }
-  write_transport_for_each_safe(transport, n, &__android_log_persist_write) {
-    transport->logMask = 0;
-    list_remove(&transport->node);
-  }
-}
diff --git a/liblog/config_write.h b/liblog/config_write.h
deleted file mode 100644
index a901f13..0000000
--- a/liblog/config_write.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <cutils/list.h>
-
-#include "log_portability.h"
-
-__BEGIN_DECLS
-
-extern struct listnode __android_log_transport_write;
-extern struct listnode __android_log_persist_write;
-
-#define write_transport_for_each(transp, transports)                           \
-  for ((transp) = node_to_item((transports)->next,                             \
-                               struct android_log_transport_write, node);      \
-       ((transp) != node_to_item((transports),                                 \
-                                 struct android_log_transport_write, node)) && \
-       ((transp) != node_to_item((transp)->node.next,                          \
-                                 struct android_log_transport_write, node));   \
-       (transp) = node_to_item((transp)->node.next,                            \
-                               struct android_log_transport_write, node))
-
-#define write_transport_for_each_safe(transp, n, transports)                   \
-  for ((transp) = node_to_item((transports)->next,                             \
-                               struct android_log_transport_write, node),      \
-      (n) = (transp)->node.next;                                               \
-       ((transp) != node_to_item((transports),                                 \
-                                 struct android_log_transport_write, node)) && \
-       ((transp) !=                                                            \
-        node_to_item((n), struct android_log_transport_write, node));          \
-       (transp) = node_to_item((n), struct android_log_transport_write, node), \
-      (n) = (transp)->node.next)
-
-void __android_log_config_write();
-void __android_log_config_write_close();
-
-__END_DECLS
diff --git a/liblog/event_tag_map.cpp b/liblog/event_tag_map.cpp
index 22cf43b..2886289 100644
--- a/liblog/event_tag_map.cpp
+++ b/liblog/event_tag_map.cpp
@@ -494,7 +494,7 @@
 
 // Cache miss, go to logd to acquire a public reference.
 // Because we lack access to a SHARED PUBLIC /dev/event-log-tags file map?
-static const TagFmt* __getEventTag(EventTagMap* map, unsigned int tag) {
+static const TagFmt* __getEventTag([[maybe_unused]] EventTagMap* map, unsigned int tag) {
   // call event tag service to arrange for a new tag
   char* buf = NULL;
   // Can not use android::base::StringPrintf, asprintf + free instead.
@@ -515,8 +515,9 @@
     } else {
       size = ret;
     }
+#ifdef __ANDROID__
     // Ask event log tag service for an existing entry
-    if (__send_log_msg(buf, size) >= 0) {
+    if (SendLogdControlMessage(buf, size) >= 0) {
       buf[size - 1] = '\0';
       char* ep;
       unsigned long val = strtoul(buf, &ep, 10);  // return size
@@ -529,6 +530,7 @@
         }
       }
     }
+#endif
     free(buf);
   }
   return NULL;
@@ -618,8 +620,9 @@
     } else {
       size = ret;
     }
+#ifdef __ANDROID__
     // Ask event log tag service for an allocation
-    if (__send_log_msg(buf, size) >= 0) {
+    if (SendLogdControlMessage(buf, size) >= 0) {
       buf[size - 1] = '\0';
       unsigned long val = strtoul(buf, &cp, 10);        // return size
       if ((buf != cp) && (val > 0) && (*cp == '\n')) {  // truncation OK
@@ -635,6 +638,7 @@
         }
       }
     }
+#endif
     free(buf);
   }
 
diff --git a/liblog/fake_log_device.cpp b/liblog/fake_log_device.cpp
index 428a482..4143fa6 100644
--- a/liblog/fake_log_device.cpp
+++ b/liblog/fake_log_device.cpp
@@ -23,18 +23,20 @@
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
-#if !defined(_WIN32)
-#include <pthread.h>
-#endif
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 
+#include <mutex>
+
 #include <android/log.h>
+#include <log/log_id.h>
+#include <log/logprint.h>
 
 #include "log_portability.h"
+#include "logger.h"
 
 #define kMaxTagLen 16 /* from the long-dead utils/Log.cpp */
 
@@ -46,37 +48,26 @@
 #define TRACE(...) ((void)0)
 #endif
 
-/* from the long-dead utils/Log.cpp */
-typedef enum {
-  FORMAT_OFF = 0,
-  FORMAT_BRIEF,
-  FORMAT_PROCESS,
-  FORMAT_TAG,
-  FORMAT_THREAD,
-  FORMAT_RAW,
-  FORMAT_TIME,
-  FORMAT_THREADTIME,
-  FORMAT_LONG
-} LogFormat;
+static int FakeAvailable(log_id_t);
+static int FakeOpen();
+static void FakeClose();
+static int FakeWrite(log_id_t log_id, struct timespec* ts, struct iovec* vec, size_t nr);
 
-/*
- * Log driver state.
- */
+struct android_log_transport_write fakeLoggerWrite = {
+    .name = "fake",
+    .logMask = 0,
+    .available = FakeAvailable,
+    .open = FakeOpen,
+    .close = FakeClose,
+    .write = FakeWrite,
+};
+
 typedef struct LogState {
-  /* the fake fd that's seen by the user */
-  int fakeFd;
-
-  /* a printable name for this fake device */
-  char debugName[sizeof("/dev/log/security")];
-
-  /* nonzero if this is a binary log */
-  int isBinary;
-
   /* global minimum priority */
-  int globalMinPriority;
+  int global_min_priority;
 
   /* output format */
-  LogFormat outputFormat;
+  AndroidLogPrintFormat output_format;
 
   /* tags and priorities */
   struct {
@@ -85,81 +76,18 @@
   } tagSet[kTagSetSize];
 } LogState;
 
-#if !defined(_WIN32)
 /*
  * Locking.  Since we're emulating a device, we need to be prepared
  * to have multiple callers at the same time.  This lock is used
  * to both protect the fd list and to prevent LogStates from being
  * freed out from under a user.
  */
-static pthread_mutex_t fakeLogDeviceLock = PTHREAD_MUTEX_INITIALIZER;
+std::mutex mutex;
 
-static void lock() {
-  /*
-   * If we trigger a signal handler in the middle of locked activity and the
-   * signal handler logs a message, we could get into a deadlock state.
-   */
-  pthread_mutex_lock(&fakeLogDeviceLock);
-}
+static LogState log_state;
 
-static void unlock() {
-  pthread_mutex_unlock(&fakeLogDeviceLock);
-}
-
-#else  // !defined(_WIN32)
-
-#define lock() ((void)0)
-#define unlock() ((void)0)
-
-#endif  // !defined(_WIN32)
-
-/*
- * File descriptor management.
- */
-#define FAKE_FD_BASE 10000
-#define MAX_OPEN_LOGS 8
-static LogState openLogTable[MAX_OPEN_LOGS];
-
-/*
- * Allocate an fd and associate a new LogState with it.
- * The fd is available via the fakeFd field of the return value.
- */
-static LogState* createLogState() {
-  size_t i;
-
-  for (i = 0; i < (sizeof(openLogTable) / sizeof(openLogTable[0])); i++) {
-    if (openLogTable[i].fakeFd == 0) {
-      openLogTable[i].fakeFd = FAKE_FD_BASE + i;
-      return &openLogTable[i];
-    }
-  }
-  return NULL;
-}
-
-/*
- * Translate an fd to a LogState.
- */
-static LogState* fdToLogState(int fd) {
-  if (fd >= FAKE_FD_BASE && fd < FAKE_FD_BASE + MAX_OPEN_LOGS) {
-    return &openLogTable[fd - FAKE_FD_BASE];
-  }
-  return NULL;
-}
-
-/*
- * Unregister the fake fd and free the memory it pointed to.
- */
-static void deleteFakeFd(int fd) {
-  LogState* ls;
-
-  lock();
-
-  ls = fdToLogState(fd);
-  if (ls != NULL) {
-    memset(&openLogTable[fd - FAKE_FD_BASE], 0, sizeof(openLogTable[0]));
-  }
-
-  unlock();
+static int FakeAvailable(log_id_t) {
+  return 0;
 }
 
 /*
@@ -175,19 +103,11 @@
  * We also want to check ANDROID_PRINTF_LOG to determine how the output
  * will look.
  */
-static void configureInitialState(const char* pathName, LogState* logState) {
-  static const int kDevLogLen = sizeof("/dev/log/") - 1;
-
-  strncpy(logState->debugName, pathName, sizeof(logState->debugName));
-  logState->debugName[sizeof(logState->debugName) - 1] = '\0';
-
-  /* identify binary logs */
-  if (!strcmp(pathName + kDevLogLen, "events") || !strcmp(pathName + kDevLogLen, "security")) {
-    logState->isBinary = 1;
-  }
+int FakeOpen() {
+  std::lock_guard guard{mutex};
 
   /* global min priority defaults to "info" level */
-  logState->globalMinPriority = ANDROID_LOG_INFO;
+  log_state.global_min_priority = ANDROID_LOG_INFO;
 
   /*
    * This is based on the the long-dead utils/Log.cpp code.
@@ -209,7 +129,7 @@
       }
       if (i == kMaxTagLen) {
         TRACE("ERROR: env tag too long (%d chars max)\n", kMaxTagLen - 1);
-        return;
+        return 0;
       }
       tagName[i] = '\0';
 
@@ -260,16 +180,16 @@
         if (*tags != '\0' && !isspace(*tags)) {
           TRACE("ERROR: garbage in tag env; expected whitespace\n");
           TRACE("       env='%s'\n", tags);
-          return;
+          return 0;
         }
       }
 
       if (tagName[0] == 0) {
-        logState->globalMinPriority = minPrio;
+        log_state.global_min_priority = minPrio;
         TRACE("+++ global min prio %d\n", logState->globalMinPriority);
       } else {
-        logState->tagSet[entry].minPriority = minPrio;
-        strcpy(logState->tagSet[entry].tag, tagName);
+        log_state.tagSet[entry].minPriority = minPrio;
+        strcpy(log_state.tagSet[entry].tag, tagName);
         TRACE("+++ entry %d: %s:%d\n", entry, logState->tagSet[entry].tag,
               logState->tagSet[entry].minPriority);
         entry++;
@@ -281,7 +201,7 @@
    * Taken from the long-dead utils/Log.cpp
    */
   const char* fstr = getenv("ANDROID_PRINTF_LOG");
-  LogFormat format;
+  AndroidLogPrintFormat format;
   if (fstr == NULL) {
     format = FORMAT_BRIEF;
   } else {
@@ -300,10 +220,11 @@
     else if (strcmp(fstr, "long") == 0)
       format = FORMAT_PROCESS;
     else
-      format = (LogFormat)atoi(fstr);  // really?!
+      format = (AndroidLogPrintFormat)atoi(fstr);  // really?!
   }
 
-  logState->outputFormat = format;
+  log_state.output_format = format;
+  return 0;
 }
 
 /*
@@ -348,7 +269,7 @@
  *
  * Log format parsing taken from the long-dead utils/Log.cpp.
  */
-static void showLog(LogState* state, int logPrio, const char* tag, const char* msg) {
+static void ShowLog(int logPrio, const char* tag, const char* msg) {
 #if !defined(_WIN32)
   struct tm tmBuf;
 #endif
@@ -391,7 +312,7 @@
    */
   size_t prefixLen, suffixLen;
 
-  switch (state->outputFormat) {
+  switch (log_state.output_format) {
     case FORMAT_TAG:
       prefixLen = snprintf(prefixBuf, sizeof(prefixBuf), "%c/%-8s: ", priChar, tag);
       strcpy(suffixBuf, "\n");
@@ -548,35 +469,24 @@
  *  tag (N bytes -- null-terminated ASCII string)
  *  message (N bytes -- null-terminated ASCII string)
  */
-ssize_t fakeLogWritev(int fd, const struct iovec* vector, int count) {
-  LogState* state;
-
+static int FakeWrite(log_id_t log_id, struct timespec*, struct iovec* vector, size_t count) {
   /* Make sure that no-one frees the LogState while we're using it.
    * Also guarantees that only one thread is in showLog() at a given
    * time (if it matters).
    */
-  lock();
+  std::lock_guard guard{mutex};
 
-  state = fdToLogState(fd);
-  if (state == NULL) {
-    errno = EBADF;
-    unlock();
-    return -1;
-  }
-
-  if (state->isBinary) {
-    TRACE("%s: ignoring binary log\n", state->debugName);
-    unlock();
+  if (log_id == LOG_ID_EVENTS || log_id == LOG_ID_STATS || log_id == LOG_ID_SECURITY) {
+    TRACE("%s: ignoring binary log\n", android_log_id_to_name(log_id));
     int len = 0;
-    for (int i = 0; i < count; ++i) {
+    for (size_t i = 0; i < count; ++i) {
       len += vector[i].iov_len;
     }
     return len;
   }
 
   if (count != 3) {
-    TRACE("%s: writevLog with count=%d not expected\n", state->debugName, count);
-    unlock();
+    TRACE("%s: writevLog with count=%d not expected\n", android_log_id_to_name(log_id), count);
     return -1;
   }
 
@@ -586,32 +496,30 @@
   const char* msg = (const char*)vector[2].iov_base;
 
   /* see if this log tag is configured */
-  int i;
-  int minPrio = state->globalMinPriority;
-  for (i = 0; i < kTagSetSize; i++) {
-    if (state->tagSet[i].minPriority == ANDROID_LOG_UNKNOWN)
+  int minPrio = log_state.global_min_priority;
+  for (size_t i = 0; i < kTagSetSize; i++) {
+    if (log_state.tagSet[i].minPriority == ANDROID_LOG_UNKNOWN)
       break; /* reached end of configured values */
 
-    if (strcmp(state->tagSet[i].tag, tag) == 0) {
-      minPrio = state->tagSet[i].minPriority;
+    if (strcmp(log_state.tagSet[i].tag, tag) == 0) {
+      minPrio = log_state.tagSet[i].minPriority;
       break;
     }
   }
 
   if (logPrio >= minPrio) {
-    showLog(state, logPrio, tag, msg);
+    ShowLog(logPrio, tag, msg);
   }
 
-  unlock();
   int len = 0;
-  for (i = 0; i < count; ++i) {
+  for (size_t i = 0; i < count; ++i) {
     len += vector[i].iov_len;
   }
   return len;
 }
 
 /*
- * Free up our state and close the fake descriptor.
+ * Reset out state.
  *
  * The logger API has no means or need to 'stop' or 'close' using the logs,
  * and as such, there is no way for that 'stop' or 'close' to translate into
@@ -623,35 +531,10 @@
  * call is in the exit handler. Logging can continue in the exit handler to
  * help debug HOST tools ...
  */
-int fakeLogClose(int fd) {
-  deleteFakeFd(fd);
-  return 0;
-}
+static void FakeClose() {
+  std::lock_guard guard{mutex};
 
-/*
- * Open a log output device and return a fake fd.
- */
-int fakeLogOpen(const char* pathName) {
-  LogState* logState;
-  int fd = -1;
-
-  lock();
-
-  logState = createLogState();
-  if (logState != NULL) {
-    configureInitialState(pathName, logState);
-    fd = logState->fakeFd;
-  } else {
-    errno = ENFILE;
-  }
-
-  unlock();
-
-  return fd;
-}
-
-ssize_t __send_log_msg(char*, size_t) {
-  return -ENODEV;
+  memset(&log_state, 0, sizeof(log_state));
 }
 
 int __android_log_is_loggable(int prio, const char*, int def) {
diff --git a/liblog/fake_log_device.h b/liblog/fake_log_device.h
index ce54db2..bd2256c 100644
--- a/liblog/fake_log_device.h
+++ b/liblog/fake_log_device.h
@@ -29,7 +29,6 @@
 int fakeLogClose(int fd);
 ssize_t fakeLogWritev(int fd, const struct iovec* vector, int count);
 
-ssize_t __send_log_msg(char*, size_t);
 int __android_log_is_loggable(int prio, const char*, int def);
 int __android_log_is_loggable_len(int prio, const char*, size_t, int def);
 int __android_log_is_debuggable();
diff --git a/liblog/fake_writer.cpp b/liblog/fake_writer.cpp
deleted file mode 100644
index c0b0e69..0000000
--- a/liblog/fake_writer.cpp
+++ /dev/null
@@ -1,101 +0,0 @@
-/*
- * Copyright (C) 2007-2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include <log/log.h>
-
-#include "config_write.h"
-#include "fake_log_device.h"
-#include "log_portability.h"
-#include "logger.h"
-
-static int fakeOpen();
-static void fakeClose();
-static int fakeWrite(log_id_t log_id, struct timespec* ts, struct iovec* vec, size_t nr);
-
-static int logFds[(int)LOG_ID_MAX] = {-1, -1, -1, -1, -1, -1};
-
-struct android_log_transport_write fakeLoggerWrite = {
-    .node = {&fakeLoggerWrite.node, &fakeLoggerWrite.node},
-    .context.priv = &logFds,
-    .name = "fake",
-    .available = NULL,
-    .open = fakeOpen,
-    .close = fakeClose,
-    .write = fakeWrite,
-};
-
-static int fakeOpen() {
-  int i;
-
-  for (i = 0; i < LOG_ID_MAX; i++) {
-    /*
-     * Known maximum size string, plus an 8 character margin to deal with
-     * possible independent changes to android_log_id_to_name().
-     */
-    char buf[sizeof("/dev/log_security") + 8];
-    if (logFds[i] >= 0) {
-      continue;
-    }
-    snprintf(buf, sizeof(buf), "/dev/log_%s", android_log_id_to_name(static_cast<log_id_t>(i)));
-    logFds[i] = fakeLogOpen(buf);
-    if (logFds[i] < 0) {
-      fprintf(stderr, "fakeLogOpen(%s) failed\n", buf);
-    }
-  }
-  return 0;
-}
-
-static void fakeClose() {
-  int i;
-
-  for (i = 0; i < LOG_ID_MAX; i++) {
-    fakeLogClose(logFds[i]);
-    logFds[i] = -1;
-  }
-}
-
-static int fakeWrite(log_id_t log_id, struct timespec*, struct iovec* vec, size_t nr) {
-  ssize_t ret;
-  size_t i;
-  int logFd, len;
-
-  if (/*(int)log_id >= 0 &&*/ (int)log_id >= (int)LOG_ID_MAX) {
-    return -EINVAL;
-  }
-
-  len = 0;
-  for (i = 0; i < nr; ++i) {
-    len += vec[i].iov_len;
-  }
-
-  if (len > LOGGER_ENTRY_MAX_PAYLOAD) {
-    len = LOGGER_ENTRY_MAX_PAYLOAD;
-  }
-
-  logFd = logFds[(int)log_id];
-  ret = TEMP_FAILURE_RETRY(fakeLogWritev(logFd, vec, nr));
-  if (ret < 0) {
-    ret = -errno;
-  } else if (ret > len) {
-    ret = len;
-  }
-
-  return ret;
-}
diff --git a/liblog/include/android/log.h b/liblog/include/android/log.h
index 935590d..7290789 100644
--- a/liblog/include/android/log.h
+++ b/liblog/include/android/log.h
@@ -96,20 +96,14 @@
  * [printf(3)](http://man7.org/linux/man-pages/man3/printf.3.html).
  */
 int __android_log_print(int prio, const char* tag, const char* fmt, ...)
-#if defined(__GNUC__)
-    __attribute__((__format__(printf, 3, 4)))
-#endif
-    ;
+    __attribute__((__format__(printf, 3, 4)));
 
 /**
  * Equivalent to `__android_log_print`, but taking a `va_list`.
  * (If `__android_log_print` is like `printf`, this is like `vprintf`.)
  */
 int __android_log_vprint(int prio, const char* tag, const char* fmt, va_list ap)
-#if defined(__GNUC__)
-    __attribute__((__format__(printf, 3, 0)))
-#endif
-    ;
+    __attribute__((__format__(printf, 3, 0)));
 
 /**
  * Writes an assertion failure to the log (as `ANDROID_LOG_FATAL`) and to
@@ -127,16 +121,9 @@
  * including the source filename and line number more conveniently than this
  * function.
  */
-void __android_log_assert(const char* cond, const char* tag, const char* fmt,
-                          ...)
-#if defined(__GNUC__)
-    __attribute__((__noreturn__))
-    __attribute__((__format__(printf, 3, 4)))
-#endif
-    ;
+void __android_log_assert(const char* cond, const char* tag, const char* fmt, ...)
+    __attribute__((__noreturn__)) __attribute__((__format__(printf, 3, 4)));
 
-#ifndef log_id_t_defined
-#define log_id_t_defined
 /**
  * Identifies a specific log buffer for __android_log_buf_write()
  * and __android_log_buf_print().
@@ -163,7 +150,6 @@
 
   LOG_ID_MAX
 } log_id_t;
-#endif
 
 /**
  * Writes the constant string `text` to the log buffer `id`,
@@ -171,8 +157,7 @@
  *
  * Apps should use __android_log_write() instead.
  */
-int __android_log_buf_write(int bufID, int prio, const char* tag,
-                            const char* text);
+int __android_log_buf_write(int bufID, int prio, const char* tag, const char* text);
 
 /**
  * Writes a formatted string to log buffer `id`,
@@ -182,12 +167,8 @@
  *
  * Apps should use __android_log_print() instead.
  */
-int __android_log_buf_print(int bufID, int prio, const char* tag,
-                            const char* fmt, ...)
-#if defined(__GNUC__)
-    __attribute__((__format__(printf, 4, 5)))
-#endif
-    ;
+int __android_log_buf_print(int bufID, int prio, const char* tag, const char* fmt, ...)
+    __attribute__((__format__(printf, 4, 5)));
 
 #ifdef __cplusplus
 }
diff --git a/liblog/include/log/event_tag_map.h b/liblog/include/log/event_tag_map.h
index 2687b3a..f7ec208 100644
--- a/liblog/include/log/event_tag_map.h
+++ b/liblog/include/log/event_tag_map.h
@@ -16,6 +16,8 @@
 
 #pragma once
 
+#include <stddef.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/liblog/include/log/log.h b/liblog/include/log/log.h
index 5928649..90d1e76 100644
--- a/liblog/include/log/log.h
+++ b/liblog/include/log/log.h
@@ -22,7 +22,6 @@
 #endif
 #include <stdint.h> /* uint16_t, int32_t */
 #include <stdio.h>
-#include <sys/types.h>
 #include <time.h>
 #include <unistd.h>
 
@@ -65,21 +64,6 @@
 #endif
 #endif
 
-/* --------------------------------------------------------------------- */
-
-/*
- * This file uses ", ## __VA_ARGS__" zero-argument token pasting to
- * work around issues with debug-only syntax errors in assertions
- * that are missing format strings.  See commit
- * 19299904343daf191267564fe32e6cd5c165cd42
- */
-#if defined(__clang__)
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wgnu-zero-variadic-macro-arguments"
-#endif
-
-/* --------------------------------------------------------------------- */
-
 /*
  * Event logging.
  */
@@ -164,10 +148,6 @@
  */
 void __android_log_close(void);
 
-#if defined(__clang__)
-#pragma clang diagnostic pop
-#endif
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/liblog/include/log/log_event_list.h b/liblog/include/log/log_event_list.h
index 636d417..deadf20 100644
--- a/liblog/include/log/log_event_list.h
+++ b/liblog/include/log/log_event_list.h
@@ -36,16 +36,11 @@
 /*
  * The opaque context used to manipulate lists of events.
  */
-#ifndef __android_log_context_defined
-#define __android_log_context_defined
 typedef struct android_log_context_internal* android_log_context;
-#endif
 
 /*
  * Elements returned when reading a list of events.
  */
-#ifndef __android_log_list_element_defined
-#define __android_log_list_element_defined
 typedef struct {
   AndroidEventLogType type;
   uint16_t complete;
@@ -57,7 +52,6 @@
     float float32;
   } data;
 } android_log_list_element;
-#endif
 
 /*
  * Creates a context associated with an event tag to write elements to
@@ -104,8 +98,6 @@
 int android_log_destroy(android_log_context* ctx);
 
 #ifdef __cplusplus
-#ifndef __class_android_log_event_list_defined
-#define __class_android_log_event_list_defined
 /* android_log_list C++ helpers */
 extern "C++" {
 class android_log_event_list {
@@ -280,7 +272,6 @@
 };
 }
 #endif
-#endif
 
 #ifdef __cplusplus
 }
diff --git a/liblog/include/log/log_id.h b/liblog/include/log/log_id.h
index c052a50..c8fafe7 100644
--- a/liblog/include/log/log_id.h
+++ b/liblog/include/log/log_id.h
@@ -16,41 +16,19 @@
 
 #pragma once
 
+#include <android/log.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#ifndef log_id_t_defined
-#define log_id_t_defined
-typedef enum log_id {
-  LOG_ID_MIN = 0,
-
-  LOG_ID_MAIN = 0,
-  LOG_ID_RADIO = 1,
-  LOG_ID_EVENTS = 2,
-  LOG_ID_SYSTEM = 3,
-  LOG_ID_CRASH = 4,
-  LOG_ID_STATS = 5,
-  LOG_ID_SECURITY = 6,
-  LOG_ID_KERNEL = 7, /* place last, third-parties can not use it */
-
-  LOG_ID_MAX
-} log_id_t;
-#endif
-#define sizeof_log_id_t sizeof(typeof_log_id_t)
-#define typeof_log_id_t unsigned char
-
 /*
  * Send a simple string to the log.
  */
 int __android_log_buf_write(int bufID, int prio, const char* tag,
                             const char* text);
-int __android_log_buf_print(int bufID, int prio, const char* tag,
-                            const char* fmt, ...)
-#if defined(__GNUC__)
-    __attribute__((__format__(printf, 4, 5)))
-#endif
-    ;
+int __android_log_buf_print(int bufID, int prio, const char* tag, const char* fmt, ...)
+    __attribute__((__format__(printf, 4, 5)));
 
 /*
  * log_id_t helpers
diff --git a/liblog/include/log/log_read.h b/liblog/include/log/log_read.h
index fdef306..18c1c33 100644
--- a/liblog/include/log/log_read.h
+++ b/liblog/include/log/log_read.h
@@ -50,64 +50,9 @@
 
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wzero-length-array"
-/*
- * The userspace structure for version 1 of the logger_entry ABI.
- */
-#ifndef __struct_logger_entry_defined
-#define __struct_logger_entry_defined
 struct logger_entry {
-  uint16_t len;   /* length of the payload */
-  uint16_t __pad; /* no matter what, we get 2 bytes of padding */
-  int32_t pid;    /* generating process's pid */
-  int32_t tid;    /* generating process's tid */
-  int32_t sec;    /* seconds since Epoch */
-  int32_t nsec;   /* nanoseconds */
-  char msg[0]; /* the entry's payload */
-};
-#endif
-
-/*
- * The userspace structure for version 2 of the logger_entry ABI.
- */
-#ifndef __struct_logger_entry_v2_defined
-#define __struct_logger_entry_v2_defined
-struct logger_entry_v2 {
   uint16_t len;      /* length of the payload */
-  uint16_t hdr_size; /* sizeof(struct logger_entry_v2) */
-  int32_t pid;       /* generating process's pid */
-  int32_t tid;       /* generating process's tid */
-  int32_t sec;       /* seconds since Epoch */
-  int32_t nsec;      /* nanoseconds */
-  uint32_t euid;     /* effective UID of logger */
-  char msg[0]; /* the entry's payload */
-} __attribute__((__packed__));
-#endif
-
-/*
- * The userspace structure for version 3 of the logger_entry ABI.
- */
-#ifndef __struct_logger_entry_v3_defined
-#define __struct_logger_entry_v3_defined
-struct logger_entry_v3 {
-  uint16_t len;      /* length of the payload */
-  uint16_t hdr_size; /* sizeof(struct logger_entry_v3) */
-  int32_t pid;       /* generating process's pid */
-  int32_t tid;       /* generating process's tid */
-  int32_t sec;       /* seconds since Epoch */
-  int32_t nsec;      /* nanoseconds */
-  uint32_t lid;      /* log id of the payload */
-  char msg[0]; /* the entry's payload */
-} __attribute__((__packed__));
-#endif
-
-/*
- * The userspace structure for version 4 of the logger_entry ABI.
- */
-#ifndef __struct_logger_entry_v4_defined
-#define __struct_logger_entry_v4_defined
-struct logger_entry_v4 {
-  uint16_t len;      /* length of the payload */
-  uint16_t hdr_size; /* sizeof(struct logger_entry_v4) */
+  uint16_t hdr_size; /* sizeof(struct logger_entry) */
   int32_t pid;       /* generating process's pid */
   uint32_t tid;      /* generating process's tid */
   uint32_t sec;      /* seconds since Epoch */
@@ -116,7 +61,6 @@
   uint32_t uid;      /* generating process's uid */
   char msg[0]; /* the entry's payload */
 };
-#endif
 #pragma clang diagnostic pop
 
 /*
@@ -133,16 +77,10 @@
  */
 #define LOGGER_ENTRY_MAX_LEN (5 * 1024)
 
-#ifndef __struct_log_msg_defined
-#define __struct_log_msg_defined
 struct log_msg {
   union {
     unsigned char buf[LOGGER_ENTRY_MAX_LEN + 1];
-    struct logger_entry_v4 entry;
-    struct logger_entry_v4 entry_v4;
-    struct logger_entry_v3 entry_v3;
-    struct logger_entry_v2 entry_v2;
-    struct logger_entry entry_v1;
+    struct logger_entry entry;
   } __attribute__((aligned(4)));
 #ifdef __cplusplus
   /* Matching log_time operators */
@@ -176,22 +114,14 @@
   }
   char* msg() {
     unsigned short hdr_size = entry.hdr_size;
-    if (!hdr_size) {
-      hdr_size = sizeof(entry_v1);
-    }
-    if ((hdr_size < sizeof(entry_v1)) || (hdr_size > sizeof(entry))) {
+    if (hdr_size >= sizeof(struct log_msg) - sizeof(entry)) {
       return nullptr;
     }
     return reinterpret_cast<char*>(buf) + hdr_size;
   }
-  unsigned int len() {
-    return (entry.hdr_size ? entry.hdr_size
-                           : static_cast<uint16_t>(sizeof(entry_v1))) +
-           entry.len;
-  }
+  unsigned int len() { return entry.hdr_size + entry.len; }
 #endif
 };
-#endif
 
 struct logger;
 
@@ -209,8 +139,7 @@
                                       char* buf, size_t len);
 ssize_t android_logger_get_prune_list(struct logger_list* logger_list,
                                       char* buf, size_t len);
-int android_logger_set_prune_list(struct logger_list* logger_list, char* buf,
-                                  size_t len);
+int android_logger_set_prune_list(struct logger_list* logger_list, const char* buf, size_t len);
 
 #define ANDROID_LOG_RDONLY O_RDONLY
 #define ANDROID_LOG_WRONLY O_WRONLY
diff --git a/liblog/include/log/log_time.h b/liblog/include/log/log_time.h
index 09c9910..6b4458c 100644
--- a/liblog/include/log/log_time.h
+++ b/liblog/include/log/log_time.h
@@ -24,9 +24,6 @@
 #define US_PER_SEC 1000000ULL
 #define MS_PER_SEC 1000ULL
 
-#ifndef __struct_log_time_defined
-#define __struct_log_time_defined
-
 #define LOG_TIME_SEC(t) ((t)->tv_sec)
 /* next power of two after NS_PER_SEC */
 #define LOG_TIME_NSEC(t) ((t)->tv_nsec & (UINT32_MAX >> 2))
@@ -35,11 +32,6 @@
 
 extern "C" {
 
-/*
- * NB: we did NOT define a copy constructor. This will result in structure
- * no longer being compatible with pass-by-value which is desired
- * efficient behavior. Also, pass-by-reference breaks C/C++ ABI.
- */
 struct log_time {
  public:
   uint32_t tv_sec = 0; /* good to Feb 5 2106 */
@@ -169,5 +161,3 @@
 } __attribute__((__packed__)) log_time;
 
 #endif /* __cplusplus */
-
-#endif /* __struct_log_time_defined */
diff --git a/liblog/include/log/log_transport.h b/liblog/include/log/log_transport.h
deleted file mode 100644
index b48761a..0000000
--- a/liblog/include/log/log_transport.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
-**
-** Copyright 2017, The Android Open Source Project
-**
-** This file is dual licensed.  It may be redistributed and/or modified
-** under the terms of the Apache 2.0 License OR version 2 of the GNU
-** General Public License.
-*/
-
-#pragma once
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/*
- * Logging transports, bit mask to select features. Function returns selection.
- */
-/* clang-format off */
-#define LOGGER_DEFAULT 0x00
-#define LOGGER_LOGD    0x01
-#define LOGGER_KERNEL  0x02 /* Reserved/Deprecated */
-#define LOGGER_NULL    0x04 /* Does not release resources of other selections */
-#define LOGGER_RESERVED 0x08 /* Reserved, previously for logging to local memory */
-#define LOGGER_STDERR  0x10 /* logs sent to stderr */
-/* clang-format on */
-
-/* Both return the selected transport flag mask, or negative errno */
-int android_set_log_transport(int transport_flag);
-int android_get_log_transport();
-
-#ifdef __cplusplus
-}
-#endif
diff --git a/liblog/include/log/logprint.h b/liblog/include/log/logprint.h
index 8f4b187..7dfd914 100644
--- a/liblog/include/log/logprint.h
+++ b/liblog/include/log/logprint.h
@@ -16,7 +16,8 @@
 
 #pragma once
 
-#include <pthread.h>
+#include <stdint.h>
+#include <sys/types.h>
 
 #include <android/log.h>
 #include <log/event_tag_map.h>
diff --git a/liblog/include/private/android_logger.h b/liblog/include/private/android_logger.h
index 5e04148..d3b72bc 100644
--- a/liblog/include/private/android_logger.h
+++ b/liblog/include/private/android_logger.h
@@ -47,7 +47,7 @@
 
 /* Header Structure to logd, and second header for pstore */
 typedef struct __attribute__((__packed__)) {
-  typeof_log_id_t id;
+  uint8_t id;
   uint16_t tid;
   log_time realtime;
 } android_log_header_t;
@@ -57,6 +57,18 @@
   int32_t tag;  // Little Endian Order
 } android_event_header_t;
 
+// Event payload EVENT_TYPE_LIST
+typedef struct __attribute__((__packed__)) {
+  int8_t type;  // EVENT_TYPE_LIST
+  int8_t element_count;
+} android_event_list_t;
+
+// Event payload EVENT_TYPE_FLOAT
+typedef struct __attribute__((__packed__)) {
+  int8_t type;  // EVENT_TYPE_FLOAT
+  float data;
+} android_event_float_t;
+
 /* Event payload EVENT_TYPE_INT */
 typedef struct __attribute__((__packed__)) {
   int8_t type;   // EVENT_TYPE_INT
diff --git a/liblog/liblog.map.txt b/liblog/liblog.map.txt
index ce4c53c..2dd8059 100644
--- a/liblog/liblog.map.txt
+++ b/liblog/liblog.map.txt
@@ -1,7 +1,7 @@
 LIBLOG {
   global:
-    android_name_to_log_id; # vndk
-    android_log_id_to_name; # vndk
+    android_name_to_log_id; # llndk
+    android_log_id_to_name; # llndk
     __android_log_assert;
     __android_log_buf_print;
     __android_log_buf_write;
@@ -14,44 +14,44 @@
 
 LIBLOG_L {
   global:
-    android_logger_clear; # vndk
-    android_logger_get_id; # vndk
-    android_logger_get_log_readable_size; # vndk
-    android_logger_get_log_version; # vndk
-    android_logger_get_log_size; # vndk
-    android_logger_list_alloc; # apex vndk
-    android_logger_list_alloc_time; # apex vndk
-    android_logger_list_free; # apex vndk
-    android_logger_list_open; # vndk
-    android_logger_list_read; # apex vndk
-    android_logger_open; # apex vndk
-    android_logger_set_log_size; # vndk
+    android_logger_clear; # llndk
+    android_logger_get_id; # llndk
+    android_logger_get_log_readable_size; # llndk
+    android_logger_get_log_version; # llndk
+    android_logger_get_log_size; # llndk
+    android_logger_list_alloc; # apex llndk
+    android_logger_list_alloc_time; # apex llndk
+    android_logger_list_free; # apex llndk
+    android_logger_list_open; # llndk
+    android_logger_list_read; # apex llndk
+    android_logger_open; # apex llndk
+    android_logger_set_log_size; # llndk
 };
 
 LIBLOG_M {
   global:
-    android_logger_get_prune_list; # vndk
-    android_logger_set_prune_list; # vndk
-    android_logger_get_statistics; # vndk
-    __android_log_error_write; # apex vndk
+    android_logger_get_prune_list; # llndk
+    android_logger_set_prune_list; # llndk
+    android_logger_get_statistics; # llndk
+    __android_log_error_write; # apex llndk
     __android_log_is_loggable;
-    create_android_logger; # apex vndk
-    android_log_destroy; # apex vndk
-    android_log_write_list_begin; # apex vndk
-    android_log_write_list_end; # apex vndk
-    android_log_write_int32; # apex vndk
-    android_log_write_int64; # apex vndk
-    android_log_write_string8; # apex vndk
-    android_log_write_string8_len; # apex vndk
-    android_log_write_float32; # apex vndk
-    android_log_write_list; # apex vndk
+    create_android_logger; # apex llndk
+    android_log_destroy; # apex llndk
+    android_log_write_list_begin; # apex llndk
+    android_log_write_list_end; # apex llndk
+    android_log_write_int32; # apex llndk
+    android_log_write_int64; # apex llndk
+    android_log_write_string8; # apex llndk
+    android_log_write_string8_len; # apex llndk
+    android_log_write_float32; # apex llndk
+    android_log_write_list; # apex llndk
 
 };
 
 LIBLOG_O {
   global:
     __android_log_is_loggable_len;
-    __android_log_is_debuggable; # vndk
+    __android_log_is_debuggable; # apex llndk
 };
 
 LIBLOG_Q {
@@ -61,15 +61,15 @@
     __android_log_bwrite; # apex
     __android_log_close; # apex
     __android_log_security; # apex
-    android_log_reset; #vndk
-    android_log_parser_reset; #vndk
+    __android_log_security_bswrite; # apex
+    android_log_reset; # llndk
+    android_log_parser_reset; # llndk
 };
 
 LIBLOG_PRIVATE {
   global:
     __android_log_pmsg_file_read;
     __android_log_pmsg_file_write;
-    __android_log_security_bswrite;
     __android_logger_get_buffer_size;
     __android_logger_property_get_bool;
     android_openEventTagMap;
diff --git a/liblog/log_event_list.cpp b/liblog/log_event_list.cpp
index b1b527c..e9f4a32 100644
--- a/liblog/log_event_list.cpp
+++ b/liblog/log_event_list.cpp
@@ -47,15 +47,10 @@
   uint8_t storage[LOGGER_ENTRY_MAX_PAYLOAD];
 };
 
-// TODO(tomcherry): real C++ structs.
-typedef struct android_log_context_internal android_log_context_internal;
-
 static void init_context(android_log_context_internal* context, uint32_t tag) {
-  size_t needed;
-
   context->tag = tag;
   context->read_write_flag = kAndroidLoggerWrite;
-  needed = sizeof(uint8_t) + sizeof(uint8_t);
+  size_t needed = sizeof(android_event_list_t);
   if ((context->pos + needed) > MAX_EVENT_PAYLOAD) {
     context->overflow = true;
   }
@@ -88,7 +83,6 @@
 
 android_log_context create_android_log_parser(const char* msg, size_t len) {
   android_log_context_internal* context;
-  size_t i;
 
   context =
       static_cast<android_log_context_internal*>(calloc(1, sizeof(android_log_context_internal)));
@@ -113,11 +107,9 @@
   return 0;
 }
 
-int android_log_reset(android_log_context ctx) {
-  android_log_context_internal* context;
+int android_log_reset(android_log_context context) {
   uint32_t tag;
 
-  context = (android_log_context_internal*)ctx;
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -129,10 +121,7 @@
   return 0;
 }
 
-int android_log_parser_reset(android_log_context ctx, const char* msg, size_t len) {
-  android_log_context_internal* context;
-
-  context = (android_log_context_internal*)ctx;
+int android_log_parser_reset(android_log_context context, const char* msg, size_t len) {
   if (!context || (kAndroidLoggerRead != context->read_write_flag)) {
     return -EBADF;
   }
@@ -143,11 +132,7 @@
   return 0;
 }
 
-int android_log_write_list_begin(android_log_context ctx) {
-  size_t needed;
-  android_log_context_internal* context;
-
-  context = (android_log_context_internal*)ctx;
+int android_log_write_list_begin(android_log_context context) {
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -155,7 +140,7 @@
     context->overflow = true;
     return -EOVERFLOW;
   }
-  needed = sizeof(uint8_t) + sizeof(uint8_t);
+  size_t needed = sizeof(android_event_list_t);
   if ((context->pos + needed) > MAX_EVENT_PAYLOAD) {
     context->overflow = true;
     return -EIO;
@@ -169,84 +154,56 @@
   if (context->overflow) {
     return -EIO;
   }
-  context->storage[context->pos + 0] = EVENT_TYPE_LIST;
-  context->storage[context->pos + 1] = 0;
+  auto* event_list = reinterpret_cast<android_event_list_t*>(&context->storage[context->pos]);
+  event_list->type = EVENT_TYPE_LIST;
+  event_list->element_count = 0;
   context->list[context->list_nest_depth] = context->pos + 1;
   context->count[context->list_nest_depth] = 0;
   context->pos += needed;
   return 0;
 }
 
-static inline void copy4LE(uint8_t* buf, uint32_t val) {
-  buf[0] = val & 0xFF;
-  buf[1] = (val >> 8) & 0xFF;
-  buf[2] = (val >> 16) & 0xFF;
-  buf[3] = (val >> 24) & 0xFF;
-}
-
-int android_log_write_int32(android_log_context ctx, int32_t value) {
-  size_t needed;
-  android_log_context_internal* context;
-
-  context = (android_log_context_internal*)ctx;
+int android_log_write_int32(android_log_context context, int32_t value) {
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
   if (context->overflow) {
     return -EIO;
   }
-  needed = sizeof(uint8_t) + sizeof(value);
+  size_t needed = sizeof(android_event_int_t);
   if ((context->pos + needed) > MAX_EVENT_PAYLOAD) {
     context->overflow = true;
     return -EIO;
   }
   context->count[context->list_nest_depth]++;
-  context->storage[context->pos + 0] = EVENT_TYPE_INT;
-  copy4LE(&context->storage[context->pos + 1], value);
+  auto* event_int = reinterpret_cast<android_event_int_t*>(&context->storage[context->pos]);
+  event_int->type = EVENT_TYPE_INT;
+  event_int->data = value;
   context->pos += needed;
   return 0;
 }
 
-static inline void copy8LE(uint8_t* buf, uint64_t val) {
-  buf[0] = val & 0xFF;
-  buf[1] = (val >> 8) & 0xFF;
-  buf[2] = (val >> 16) & 0xFF;
-  buf[3] = (val >> 24) & 0xFF;
-  buf[4] = (val >> 32) & 0xFF;
-  buf[5] = (val >> 40) & 0xFF;
-  buf[6] = (val >> 48) & 0xFF;
-  buf[7] = (val >> 56) & 0xFF;
-}
-
-int android_log_write_int64(android_log_context ctx, int64_t value) {
-  size_t needed;
-  android_log_context_internal* context;
-
-  context = (android_log_context_internal*)ctx;
+int android_log_write_int64(android_log_context context, int64_t value) {
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
   if (context->overflow) {
     return -EIO;
   }
-  needed = sizeof(uint8_t) + sizeof(value);
+  size_t needed = sizeof(android_event_long_t);
   if ((context->pos + needed) > MAX_EVENT_PAYLOAD) {
     context->overflow = true;
     return -EIO;
   }
   context->count[context->list_nest_depth]++;
-  context->storage[context->pos + 0] = EVENT_TYPE_LONG;
-  copy8LE(&context->storage[context->pos + 1], value);
+  auto* event_long = reinterpret_cast<android_event_long_t*>(&context->storage[context->pos]);
+  event_long->type = EVENT_TYPE_LONG;
+  event_long->data = value;
   context->pos += needed;
   return 0;
 }
 
-int android_log_write_string8_len(android_log_context ctx, const char* value, size_t maxlen) {
-  size_t needed;
-  ssize_t len;
-  android_log_context_internal* context;
-
-  context = (android_log_context_internal*)ctx;
+int android_log_write_string8_len(android_log_context context, const char* value, size_t maxlen) {
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -256,8 +213,8 @@
   if (!value) {
     value = "";
   }
-  len = strnlen(value, maxlen);
-  needed = sizeof(uint8_t) + sizeof(int32_t) + len;
+  int32_t len = strnlen(value, maxlen);
+  size_t needed = sizeof(android_event_string_t) + len;
   if ((context->pos + needed) > MAX_EVENT_PAYLOAD) {
     /* Truncate string for delivery */
     len = MAX_EVENT_PAYLOAD - context->pos - 1 - sizeof(int32_t);
@@ -267,10 +224,11 @@
     }
   }
   context->count[context->list_nest_depth]++;
-  context->storage[context->pos + 0] = EVENT_TYPE_STRING;
-  copy4LE(&context->storage[context->pos + 1], len);
+  auto* event_string = reinterpret_cast<android_event_string_t*>(&context->storage[context->pos]);
+  event_string->type = EVENT_TYPE_STRING;
+  event_string->length = len;
   if (len) {
-    memcpy(&context->storage[context->pos + 5], value, len);
+    memcpy(&event_string->data, value, len);
   }
   context->pos += needed;
   return len;
@@ -280,35 +238,27 @@
   return android_log_write_string8_len(ctx, value, MAX_EVENT_PAYLOAD);
 }
 
-int android_log_write_float32(android_log_context ctx, float value) {
-  size_t needed;
-  uint32_t ivalue;
-  android_log_context_internal* context;
-
-  context = (android_log_context_internal*)ctx;
+int android_log_write_float32(android_log_context context, float value) {
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
   if (context->overflow) {
     return -EIO;
   }
-  needed = sizeof(uint8_t) + sizeof(ivalue);
+  size_t needed = sizeof(android_event_float_t);
   if ((context->pos + needed) > MAX_EVENT_PAYLOAD) {
     context->overflow = true;
     return -EIO;
   }
-  ivalue = *(uint32_t*)&value;
   context->count[context->list_nest_depth]++;
-  context->storage[context->pos + 0] = EVENT_TYPE_FLOAT;
-  copy4LE(&context->storage[context->pos + 1], ivalue);
+  auto* event_float = reinterpret_cast<android_event_float_t*>(&context->storage[context->pos]);
+  event_float->type = EVENT_TYPE_FLOAT;
+  event_float->data = value;
   context->pos += needed;
   return 0;
 }
 
-int android_log_write_list_end(android_log_context ctx) {
-  android_log_context_internal* context;
-
-  context = (android_log_context_internal*)ctx;
+int android_log_write_list_end(android_log_context context) {
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -335,8 +285,7 @@
 /*
  * Logs the list of elements to the event log.
  */
-int android_log_write_list(android_log_context ctx, log_id_t id) {
-  android_log_context_internal* context;
+int android_log_write_list(android_log_context context, log_id_t id) {
   const char* msg;
   ssize_t len;
 
@@ -344,7 +293,6 @@
     return -EINVAL;
   }
 
-  context = (android_log_context_internal*)ctx;
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -369,12 +317,10 @@
                                      : __android_log_security_bwrite(context->tag, msg, len));
 }
 
-int android_log_write_list_buffer(android_log_context ctx, const char** buffer) {
-  android_log_context_internal* context;
+int android_log_write_list_buffer(android_log_context context, const char** buffer) {
   const char* msg;
   ssize_t len;
 
-  context = (android_log_context_internal*)ctx;
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -401,34 +347,16 @@
 }
 
 /*
- * Extract a 4-byte value from a byte stream.
- */
-static inline uint32_t get4LE(const uint8_t* src) {
-  return src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);
-}
-
-/*
- * Extract an 8-byte value from a byte stream.
- */
-static inline uint64_t get8LE(const uint8_t* src) {
-  uint32_t low = src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);
-  uint32_t high = src[4] | (src[5] << 8) | (src[6] << 16) | (src[7] << 24);
-  return ((uint64_t)high << 32) | (uint64_t)low;
-}
-
-/*
  * Gets the next element. Parsing errors result in an EVENT_TYPE_UNKNOWN type.
  * If there is nothing to process, the complete field is set to non-zero. If
  * an EVENT_TYPE_UNKNOWN type is returned once, and the caller does not check
  * this and continues to call this function, the behavior is undefined
  * (although it won't crash).
  */
-static android_log_list_element android_log_read_next_internal(android_log_context ctx, int peek) {
+static android_log_list_element android_log_read_next_internal(android_log_context context,
+                                                               int peek) {
   android_log_list_element elem;
   unsigned pos;
-  android_log_context_internal* context;
-
-  context = (android_log_context_internal*)ctx;
 
   memset(&elem, 0, sizeof(elem));
 
@@ -478,20 +406,22 @@
     return elem;
   }
 
-  elem.type = static_cast<AndroidEventLogType>(context->storage[pos++]);
+  elem.type = static_cast<AndroidEventLogType>(context->storage[pos]);
   switch ((int)elem.type) {
     case EVENT_TYPE_FLOAT:
     /* Rely on union to translate elem.data.int32 into elem.data.float32 */
     /* FALLTHRU */
-    case EVENT_TYPE_INT:
+    case EVENT_TYPE_INT: {
       elem.len = sizeof(int32_t);
-      if ((pos + elem.len) > context->len) {
+      if ((pos + sizeof(android_event_int_t)) > context->len) {
         elem.type = EVENT_TYPE_UNKNOWN;
         return elem;
       }
-      elem.data.int32 = get4LE(&context->storage[pos]);
+
+      auto* event_int = reinterpret_cast<android_event_int_t*>(&context->storage[pos]);
+      pos += sizeof(android_event_int_t);
+      elem.data.int32 = event_int->data;
       /* common tangeable object suffix */
-      pos += elem.len;
       elem.complete = !context->list_nest_depth && !context->count[0];
       if (!peek) {
         if (!context->count[context->list_nest_depth] ||
@@ -501,16 +431,19 @@
         context->pos = pos;
       }
       return elem;
+    }
 
-    case EVENT_TYPE_LONG:
+    case EVENT_TYPE_LONG: {
       elem.len = sizeof(int64_t);
-      if ((pos + elem.len) > context->len) {
+      if ((pos + sizeof(android_event_long_t)) > context->len) {
         elem.type = EVENT_TYPE_UNKNOWN;
         return elem;
       }
-      elem.data.int64 = get8LE(&context->storage[pos]);
+
+      auto* event_long = reinterpret_cast<android_event_long_t*>(&context->storage[pos]);
+      pos += sizeof(android_event_long_t);
+      elem.data.int64 = event_long->data;
       /* common tangeable object suffix */
-      pos += elem.len;
       elem.complete = !context->list_nest_depth && !context->count[0];
       if (!peek) {
         if (!context->count[context->list_nest_depth] ||
@@ -520,15 +453,22 @@
         context->pos = pos;
       }
       return elem;
+    }
 
-    case EVENT_TYPE_STRING:
-      if ((pos + sizeof(int32_t)) > context->len) {
+    case EVENT_TYPE_STRING: {
+      if ((pos + sizeof(android_event_string_t)) > context->len) {
         elem.type = EVENT_TYPE_UNKNOWN;
         elem.complete = true;
         return elem;
       }
-      elem.len = get4LE(&context->storage[pos]);
-      pos += sizeof(int32_t);
+      auto* event_string = reinterpret_cast<android_event_string_t*>(&context->storage[pos]);
+      pos += sizeof(android_event_string_t);
+      // Wire format is int32_t, but elem.len is uint16_t...
+      if (event_string->length >= UINT16_MAX) {
+        elem.type = EVENT_TYPE_UNKNOWN;
+        return elem;
+      }
+      elem.len = event_string->length;
       if ((pos + elem.len) > context->len) {
         elem.len = context->len - pos; /* truncate string */
         elem.complete = true;
@@ -537,7 +477,7 @@
           return elem;
         }
       }
-      elem.data.string = (char*)&context->storage[pos];
+      elem.data.string = event_string->data;
       /* common tangeable object suffix */
       pos += elem.len;
       elem.complete = !context->list_nest_depth && !context->count[0];
@@ -549,13 +489,16 @@
         context->pos = pos;
       }
       return elem;
+    }
 
-    case EVENT_TYPE_LIST:
-      if ((pos + sizeof(uint8_t)) > context->len) {
+    case EVENT_TYPE_LIST: {
+      if ((pos + sizeof(android_event_list_t)) > context->len) {
         elem.type = EVENT_TYPE_UNKNOWN;
         elem.complete = true;
         return elem;
       }
+      auto* event_list = reinterpret_cast<android_event_list_t*>(&context->storage[pos]);
+      pos += sizeof(android_event_list_t);
       elem.complete = context->list_nest_depth >= ANDROID_MAX_LIST_NEST_DEPTH;
       if (peek) {
         return elem;
@@ -563,15 +506,17 @@
       if (context->count[context->list_nest_depth]) {
         context->count[context->list_nest_depth]--;
       }
-      context->list_stop = !context->storage[pos];
+      context->list_stop = event_list->element_count == 0;
       context->list_nest_depth++;
       if (context->list_nest_depth <= ANDROID_MAX_LIST_NEST_DEPTH) {
-        context->count[context->list_nest_depth] = context->storage[pos];
+        context->count[context->list_nest_depth] = event_list->element_count;
       }
-      context->pos = pos + sizeof(uint8_t);
+      context->pos = pos;
       return elem;
+    }
 
     case EVENT_TYPE_LIST_STOP: /* Suprise Newline terminates lists. */
+      pos++;
       if (!peek) {
         context->pos = pos;
       }
diff --git a/liblog/logd_reader.cpp b/liblog/logd_reader.cpp
index b7ba782..6865c14 100644
--- a/liblog/logd_reader.cpp
+++ b/liblog/logd_reader.cpp
@@ -14,7 +14,8 @@
  * limitations under the License.
  */
 
-#include <endian.h>
+#include "logd_reader.h"
+
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
@@ -24,6 +25,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/param.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/types.h>
@@ -31,75 +33,14 @@
 #include <time.h>
 #include <unistd.h>
 
+#include <string>
+
 #include <cutils/sockets.h>
 #include <private/android_filesystem_config.h>
 #include <private/android_logger.h>
 
-#include "config_read.h"
-#include "log_portability.h"
-#include "logd_reader.h"
 #include "logger.h"
 
-/* branchless on many architectures. */
-#define min(x, y) ((y) ^ (((x) ^ (y)) & -((x) < (y))))
-
-static int logdAvailable(log_id_t LogId);
-static int logdVersion(struct android_log_logger* logger,
-                       struct android_log_transport_context* transp);
-static int logdRead(struct android_log_logger_list* logger_list,
-                    struct android_log_transport_context* transp, struct log_msg* log_msg);
-static int logdPoll(struct android_log_logger_list* logger_list,
-                    struct android_log_transport_context* transp);
-static void logdClose(struct android_log_logger_list* logger_list,
-                      struct android_log_transport_context* transp);
-static int logdClear(struct android_log_logger* logger,
-                     struct android_log_transport_context* transp);
-static ssize_t logdSetSize(struct android_log_logger* logger,
-                           struct android_log_transport_context* transp, size_t size);
-static ssize_t logdGetSize(struct android_log_logger* logger,
-                           struct android_log_transport_context* transp);
-static ssize_t logdGetReadableSize(struct android_log_logger* logger,
-                                   struct android_log_transport_context* transp);
-static ssize_t logdGetPrune(struct android_log_logger_list* logger,
-                            struct android_log_transport_context* transp, char* buf, size_t len);
-static ssize_t logdSetPrune(struct android_log_logger_list* logger,
-                            struct android_log_transport_context* transp, char* buf, size_t len);
-static ssize_t logdGetStats(struct android_log_logger_list* logger,
-                            struct android_log_transport_context* transp, char* buf, size_t len);
-
-struct android_log_transport_read logdLoggerRead = {
-    .node = {&logdLoggerRead.node, &logdLoggerRead.node},
-    .name = "logd",
-    .available = logdAvailable,
-    .version = logdVersion,
-    .read = logdRead,
-    .poll = logdPoll,
-    .close = logdClose,
-    .clear = logdClear,
-    .getSize = logdGetSize,
-    .setSize = logdSetSize,
-    .getReadableSize = logdGetReadableSize,
-    .getPrune = logdGetPrune,
-    .setPrune = logdSetPrune,
-    .getStats = logdGetStats,
-};
-
-static int logdAvailable(log_id_t logId) {
-  if (logId >= LOG_ID_MAX) {
-    return -EINVAL;
-  }
-  if (logId == LOG_ID_SECURITY) {
-    uid_t uid = __android_log_uid();
-    if (uid != AID_SYSTEM) {
-      return -EPERM;
-    }
-  }
-  if (access("/dev/socket/logdw", W_OK) == 0) {
-    return 0;
-  }
-  return -EBADF;
-}
-
 // Connects to /dev/socket/<name> and returns the associated fd or returns -1 on error.
 // O_CLOEXEC is always set.
 static int socket_local_client(const std::string& name, int type) {
@@ -112,7 +53,7 @@
   strlcpy(addr.sun_path, path.c_str(), sizeof(addr.sun_path));
 
   int fd = socket(AF_LOCAL, type | SOCK_CLOEXEC, 0);
-  if (fd == 0) {
+  if (fd == -1) {
     return -1;
   }
 
@@ -125,8 +66,7 @@
 }
 
 /* worker for sending the command to the logger */
-static ssize_t send_log_msg(struct android_log_logger* logger, const char* msg, char* buf,
-                            size_t buf_size) {
+ssize_t SendLogdControlMessage(char* buf, size_t buf_size) {
   ssize_t ret;
   size_t len;
   char* cp;
@@ -136,10 +76,6 @@
     return sock;
   }
 
-  if (msg) {
-    snprintf(buf, buf_size, msg, logger ? logger->logId : (unsigned)-1);
-  }
-
   len = strlen(buf) + 1;
   ret = TEMP_FAILURE_RETRY(write(sock, buf, len));
   if (ret <= 0) {
@@ -190,10 +126,6 @@
   return ret;
 }
 
-ssize_t __send_log_msg(char* buf, size_t buf_size) {
-  return send_log_msg(NULL, NULL, buf, buf_size);
-}
-
 static int check_log_success(char* buf, ssize_t ret) {
   if (ret < 0) {
     return ret;
@@ -207,19 +139,28 @@
   return 0;
 }
 
-static int logdClear(struct android_log_logger* logger,
-                     struct android_log_transport_context* transp __unused) {
+int android_logger_clear(struct logger* logger) {
+  if (!android_logger_is_logd(logger)) {
+    return -EINVAL;
+  }
+  uint32_t log_id = android_logger_get_id(logger);
   char buf[512];
+  snprintf(buf, sizeof(buf), "clear %" PRIu32, log_id);
 
-  return check_log_success(buf, send_log_msg(logger, "clear %d", buf, sizeof(buf)));
+  return check_log_success(buf, SendLogdControlMessage(buf, sizeof(buf)));
 }
 
 /* returns the total size of the log's ring buffer */
-static ssize_t logdGetSize(struct android_log_logger* logger,
-                           struct android_log_transport_context* transp __unused) {
-  char buf[512];
+long android_logger_get_log_size(struct logger* logger) {
+  if (!android_logger_is_logd(logger)) {
+    return -EINVAL;
+  }
 
-  ssize_t ret = send_log_msg(logger, "getLogSize %d", buf, sizeof(buf));
+  uint32_t log_id = android_logger_get_id(logger);
+  char buf[512];
+  snprintf(buf, sizeof(buf), "getLogSize %" PRIu32, log_id);
+
+  ssize_t ret = SendLogdControlMessage(buf, sizeof(buf));
   if (ret < 0) {
     return ret;
   }
@@ -231,24 +172,32 @@
   return atol(buf);
 }
 
-static ssize_t logdSetSize(struct android_log_logger* logger,
-                           struct android_log_transport_context* transp __unused, size_t size) {
+int android_logger_set_log_size(struct logger* logger, unsigned long size) {
+  if (!android_logger_is_logd(logger)) {
+    return -EINVAL;
+  }
+
+  uint32_t log_id = android_logger_get_id(logger);
   char buf[512];
+  snprintf(buf, sizeof(buf), "setLogSize %" PRIu32 " %lu", log_id, size);
 
-  snprintf(buf, sizeof(buf), "setLogSize %d %zu", logger->logId, size);
-
-  return check_log_success(buf, send_log_msg(NULL, NULL, buf, sizeof(buf)));
+  return check_log_success(buf, SendLogdControlMessage(buf, sizeof(buf)));
 }
 
 /*
  * returns the readable size of the log's ring buffer (that is, amount of the
  * log consumed)
  */
-static ssize_t logdGetReadableSize(struct android_log_logger* logger,
-                                   struct android_log_transport_context* transp __unused) {
-  char buf[512];
+long android_logger_get_log_readable_size(struct logger* logger) {
+  if (!android_logger_is_logd(logger)) {
+    return -EINVAL;
+  }
 
-  ssize_t ret = send_log_msg(logger, "getLogSizeUsed %d", buf, sizeof(buf));
+  uint32_t log_id = android_logger_get_id(logger);
+  char buf[512];
+  snprintf(buf, sizeof(buf), "getLogSizeUsed %" PRIu32, log_id);
+
+  ssize_t ret = SendLogdControlMessage(buf, sizeof(buf));
   if (ret < 0) {
     return ret;
   }
@@ -260,94 +209,68 @@
   return atol(buf);
 }
 
-/*
- * returns the logger version
- */
-static int logdVersion(struct android_log_logger* logger __unused,
-                       struct android_log_transport_context* transp __unused) {
-  uid_t uid = __android_log_uid();
-  return ((uid != AID_ROOT) && (uid != AID_LOG) && (uid != AID_SYSTEM)) ? 3 : 4;
+int android_logger_get_log_version(struct logger*) {
+  return 4;
 }
 
-/*
- * returns statistics
- */
-static ssize_t logdGetStats(struct android_log_logger_list* logger_list,
-                            struct android_log_transport_context* transp __unused, char* buf,
-                            size_t len) {
-  struct android_log_logger* logger;
+ssize_t android_logger_get_statistics(struct logger_list* logger_list, char* buf, size_t len) {
+  if (logger_list->mode & ANDROID_LOG_PSTORE) {
+    return -EINVAL;
+  }
+
   char* cp = buf;
   size_t remaining = len;
   size_t n;
 
   n = snprintf(cp, remaining, "getStatistics");
-  n = min(n, remaining);
+  n = MIN(n, remaining);
   remaining -= n;
   cp += n;
 
-  logger_for_each(logger, logger_list) {
-    n = snprintf(cp, remaining, " %d", logger->logId);
-    n = min(n, remaining);
-    remaining -= n;
-    cp += n;
+  for (size_t log_id = 0; log_id < LOG_ID_MAX; ++log_id) {
+    if ((1 << log_id) & logger_list->log_mask) {
+      n = snprintf(cp, remaining, " %zu", log_id);
+      n = MIN(n, remaining);
+      remaining -= n;
+      cp += n;
+    }
   }
 
   if (logger_list->pid) {
     snprintf(cp, remaining, " pid=%u", logger_list->pid);
   }
 
-  return send_log_msg(NULL, NULL, buf, len);
+  return SendLogdControlMessage(buf, len);
 }
-
-static ssize_t logdGetPrune(struct android_log_logger_list* logger_list __unused,
-                            struct android_log_transport_context* transp __unused, char* buf,
-                            size_t len) {
-  return send_log_msg(NULL, "getPruneList", buf, len);
-}
-
-static ssize_t logdSetPrune(struct android_log_logger_list* logger_list __unused,
-                            struct android_log_transport_context* transp __unused, char* buf,
-                            size_t len) {
-  const char cmd[] = "setPruneList ";
-  const size_t cmdlen = sizeof(cmd) - 1;
-
-  if (strlen(buf) > (len - cmdlen)) {
-    return -ENOMEM; /* KISS */
-  }
-  memmove(buf + cmdlen, buf, len - cmdlen);
-  buf[len - 1] = '\0';
-  memcpy(buf, cmd, cmdlen);
-
-  return check_log_success(buf, send_log_msg(NULL, NULL, buf, len));
-}
-
-static void caught_signal(int signum __unused) {}
-
-static int logdOpen(struct android_log_logger_list* logger_list,
-                    struct android_log_transport_context* transp) {
-  struct android_log_logger* logger;
-  struct sigaction ignore;
-  struct sigaction old_sigaction;
-  unsigned int old_alarm = 0;
-  char buffer[256], *cp, c;
-  int e, ret, remaining, sock;
-
-  if (!logger_list) {
+ssize_t android_logger_get_prune_list(struct logger_list* logger_list, char* buf, size_t len) {
+  if (logger_list->mode & ANDROID_LOG_PSTORE) {
     return -EINVAL;
   }
 
-  sock = atomic_load(&transp->context.sock);
+  snprintf(buf, len, "getPruneList");
+  return SendLogdControlMessage(buf, len);
+}
+
+int android_logger_set_prune_list(struct logger_list* logger_list, const char* buf, size_t len) {
+  if (logger_list->mode & ANDROID_LOG_PSTORE) {
+    return -EINVAL;
+  }
+
+  std::string cmd = "setPruneList " + std::string{buf, len};
+
+  return check_log_success(cmd.data(), SendLogdControlMessage(cmd.data(), cmd.size()));
+}
+
+static int logdOpen(struct logger_list* logger_list) {
+  char buffer[256], *cp, c;
+  int ret, remaining, sock;
+
+  sock = atomic_load(&logger_list->fd);
   if (sock > 0) {
     return sock;
   }
 
   sock = socket_local_client("logdr", SOCK_SEQPACKET);
-  if (sock == 0) {
-    /* Guarantee not file descriptor zero */
-    int newsock = socket_local_client("logdr", SOCK_SEQPACKET);
-    close(sock);
-    sock = newsock;
-  }
   if (sock <= 0) {
     if ((sock == -1) && errno) {
       return -errno;
@@ -362,17 +285,20 @@
   cp += 5;
   c = '=';
   remaining = sizeof(buffer) - (cp - buffer);
-  logger_for_each(logger, logger_list) {
-    ret = snprintf(cp, remaining, "%c%u", c, logger->logId);
-    ret = min(ret, remaining);
-    remaining -= ret;
-    cp += ret;
-    c = ',';
+
+  for (size_t log_id = 0; log_id < LOG_ID_MAX; ++log_id) {
+    if ((1 << log_id) & logger_list->log_mask) {
+      ret = snprintf(cp, remaining, "%c%zu", c, log_id);
+      ret = MIN(ret, remaining);
+      remaining -= ret;
+      cp += ret;
+      c = ',';
+    }
   }
 
   if (logger_list->tail) {
     ret = snprintf(cp, remaining, " tail=%u", logger_list->tail);
-    ret = min(ret, remaining);
+    ret = MIN(ret, remaining);
     remaining -= ret;
     cp += ret;
   }
@@ -381,46 +307,30 @@
     if (logger_list->mode & ANDROID_LOG_WRAP) {
       // ToDo: alternate API to allow timeout to be adjusted.
       ret = snprintf(cp, remaining, " timeout=%u", ANDROID_LOG_WRAP_DEFAULT_TIMEOUT);
-      ret = min(ret, remaining);
+      ret = MIN(ret, remaining);
       remaining -= ret;
       cp += ret;
     }
     ret = snprintf(cp, remaining, " start=%" PRIu32 ".%09" PRIu32, logger_list->start.tv_sec,
                    logger_list->start.tv_nsec);
-    ret = min(ret, remaining);
+    ret = MIN(ret, remaining);
     remaining -= ret;
     cp += ret;
   }
 
   if (logger_list->pid) {
     ret = snprintf(cp, remaining, " pid=%u", logger_list->pid);
-    ret = min(ret, remaining);
+    ret = MIN(ret, remaining);
     cp += ret;
   }
 
-  if (logger_list->mode & ANDROID_LOG_NONBLOCK) {
-    /* Deal with an unresponsive logd */
-    memset(&ignore, 0, sizeof(ignore));
-    ignore.sa_handler = caught_signal;
-    sigemptyset(&ignore.sa_mask);
-    /* particularily useful if tombstone is reporting for logd */
-    sigaction(SIGALRM, &ignore, &old_sigaction);
-    old_alarm = alarm(30);
-  }
-  ret = write(sock, buffer, cp - buffer);
-  e = errno;
-  if (logger_list->mode & ANDROID_LOG_NONBLOCK) {
-    if (e == EINTR) {
-      e = ETIMEDOUT;
-    }
-    alarm(old_alarm);
-    sigaction(SIGALRM, &old_sigaction, NULL);
-  }
+  ret = TEMP_FAILURE_RETRY(write(sock, buffer, cp - buffer));
+  int write_errno = errno;
 
   if (ret <= 0) {
     close(sock);
-    if ((ret == -1) && e) {
-      return -e;
+    if (ret == -1) {
+      return -write_errno;
     }
     if (ret == 0) {
       return -EIO;
@@ -428,7 +338,7 @@
     return ret;
   }
 
-  ret = atomic_exchange(&transp->context.sock, sock);
+  ret = atomic_exchange(&logger_list->fd, sock);
   if ((ret > 0) && (ret != sock)) {
     close(ret);
   }
@@ -436,84 +346,27 @@
 }
 
 /* Read from the selected logs */
-static int logdRead(struct android_log_logger_list* logger_list,
-                    struct android_log_transport_context* transp, struct log_msg* log_msg) {
-  int ret, e;
-  struct sigaction ignore;
-  struct sigaction old_sigaction;
-  unsigned int old_alarm = 0;
-
-  ret = logdOpen(logger_list, transp);
+int LogdRead(struct logger_list* logger_list, struct log_msg* log_msg) {
+  int ret = logdOpen(logger_list);
   if (ret < 0) {
     return ret;
   }
 
-  memset(log_msg, 0, sizeof(*log_msg));
-
-  unsigned int new_alarm = 0;
-  if (logger_list->mode & ANDROID_LOG_NONBLOCK) {
-    if ((logger_list->mode & ANDROID_LOG_WRAP) &&
-        (logger_list->start.tv_sec || logger_list->start.tv_nsec)) {
-      /* b/64143705 */
-      new_alarm = (ANDROID_LOG_WRAP_DEFAULT_TIMEOUT * 11) / 10 + 10;
-      logger_list->mode &= ~ANDROID_LOG_WRAP;
-    } else {
-      new_alarm = 30;
-    }
-
-    memset(&ignore, 0, sizeof(ignore));
-    ignore.sa_handler = caught_signal;
-    sigemptyset(&ignore.sa_mask);
-    /* particularily useful if tombstone is reporting for logd */
-    sigaction(SIGALRM, &ignore, &old_sigaction);
-    old_alarm = alarm(new_alarm);
-  }
-
   /* NOTE: SOCK_SEQPACKET guarantees we read exactly one full entry */
-  ret = recv(ret, log_msg, LOGGER_ENTRY_MAX_LEN, 0);
-  e = errno;
-
-  if (new_alarm) {
-    if ((ret == 0) || (e == EINTR)) {
-      e = EAGAIN;
-      ret = -1;
-    }
-    alarm(old_alarm);
-    sigaction(SIGALRM, &old_sigaction, NULL);
+  ret = TEMP_FAILURE_RETRY(recv(ret, log_msg, LOGGER_ENTRY_MAX_LEN, 0));
+  if ((logger_list->mode & ANDROID_LOG_NONBLOCK) && ret == 0) {
+    return -EAGAIN;
   }
 
-  if ((ret == -1) && e) {
-    return -e;
-  }
-  return ret;
-}
-
-static int logdPoll(struct android_log_logger_list* logger_list,
-                    struct android_log_transport_context* transp) {
-  struct pollfd p;
-
-  int ret = logdOpen(logger_list, transp);
-  if (ret < 0) {
-    return ret;
-  }
-
-  memset(&p, 0, sizeof(p));
-  p.fd = ret;
-  p.events = POLLIN;
-  ret = poll(&p, 1, 20);
-  if ((ret > 0) && !(p.revents & POLLIN)) {
-    ret = 0;
-  }
-  if ((ret == -1) && errno) {
+  if (ret == -1) {
     return -errno;
   }
   return ret;
 }
 
 /* Close all the logs */
-static void logdClose(struct android_log_logger_list* logger_list __unused,
-                      struct android_log_transport_context* transp) {
-  int sock = atomic_exchange(&transp->context.sock, -1);
+void LogdClose(struct logger_list* logger_list) {
+  int sock = atomic_exchange(&logger_list->fd, -1);
   if (sock > 0) {
     close(sock);
   }
diff --git a/liblog/logd_reader.h b/liblog/logd_reader.h
index 7c53cbb..2d032fa 100644
--- a/liblog/logd_reader.h
+++ b/liblog/logd_reader.h
@@ -18,10 +18,14 @@
 
 #include <unistd.h>
 
+#include "log/log_read.h"
 #include "log_portability.h"
 
 __BEGIN_DECLS
 
-ssize_t __send_log_msg(char* buf, size_t buf_size);
+int LogdRead(struct logger_list* logger_list, struct log_msg* log_msg);
+void LogdClose(struct logger_list* logger_list);
+
+ssize_t SendLogdControlMessage(char* buf, size_t buf_size);
 
 __END_DECLS
diff --git a/liblog/logd_writer.cpp b/liblog/logd_writer.cpp
index c3f72f4..a22c3be 100644
--- a/liblog/logd_writer.cpp
+++ b/liblog/logd_writer.cpp
@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-#include <endian.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
@@ -35,23 +34,19 @@
 #include <private/android_filesystem_config.h>
 #include <private/android_logger.h>
 
-#include "config_write.h"
 #include "log_portability.h"
 #include "logger.h"
 #include "uio.h"
 
-/* branchless on many architectures. */
-#define min(x, y) ((y) ^ (((x) ^ (y)) & -((x) < (y))))
-
 static int logdAvailable(log_id_t LogId);
 static int logdOpen();
 static void logdClose();
 static int logdWrite(log_id_t logId, struct timespec* ts, struct iovec* vec, size_t nr);
 
 struct android_log_transport_write logdLoggerWrite = {
-    .node = {&logdLoggerWrite.node, &logdLoggerWrite.node},
-    .context.sock = -EBADF,
     .name = "logd",
+    .logMask = 0,
+    .context.sock = -EBADF,
     .available = logdAvailable,
     .open = logdOpen,
     .close = logdClose,
@@ -153,24 +148,6 @@
     return 0;
   }
 
-  /*
-   *  struct {
-   *      // what we provide to socket
-   *      android_log_header_t header;
-   *      // caller provides
-   *      union {
-   *          struct {
-   *              char     prio;
-   *              char     payload[];
-   *          } string;
-   *          struct {
-   *              uint32_t tag
-   *              char     payload[];
-   *          } binary;
-   *      };
-   *  };
-   */
-
   header.tid = gettid();
   header.realtime.tv_sec = ts->tv_sec;
   header.realtime.tv_nsec = ts->tv_nsec;
@@ -184,9 +161,9 @@
       android_log_event_int_t buffer;
 
       header.id = LOG_ID_SECURITY;
-      buffer.header.tag = htole32(LIBLOG_LOG_TAG);
+      buffer.header.tag = LIBLOG_LOG_TAG;
       buffer.payload.type = EVENT_TYPE_INT;
-      buffer.payload.data = htole32(snapshot);
+      buffer.payload.data = snapshot;
 
       newVec[headerLength].iov_base = &buffer;
       newVec[headerLength].iov_len = sizeof(buffer);
@@ -202,9 +179,9 @@
       android_log_event_int_t buffer;
 
       header.id = LOG_ID_EVENTS;
-      buffer.header.tag = htole32(LIBLOG_LOG_TAG);
+      buffer.header.tag = LIBLOG_LOG_TAG;
       buffer.payload.type = EVENT_TYPE_INT;
-      buffer.payload.data = htole32(snapshot);
+      buffer.payload.data = snapshot;
 
       newVec[headerLength].iov_base = &buffer;
       newVec[headerLength].iov_len = sizeof(buffer);
diff --git a/liblog/logger.h b/liblog/logger.h
index accb6e7..9d74d29 100644
--- a/liblog/logger.h
+++ b/liblog/logger.h
@@ -31,12 +31,9 @@
   void* priv;
   atomic_int sock;
   atomic_int fd;
-  struct listnode* node;
-  atomic_uintptr_t atomic_pointer;
 };
 
 struct android_log_transport_write {
-  struct listnode node;
   const char* name;                  /* human name to describe the transport */
   unsigned logMask;                  /* mask cache of available() success */
   union android_log_context_union context; /* Initialized by static allocation */
@@ -49,97 +46,28 @@
                size_t nr);
 };
 
-struct android_log_logger_list;
-struct android_log_transport_context;
-struct android_log_logger;
-
-struct android_log_transport_read {
-  struct listnode node;
-  const char* name; /* human name to describe the transport */
-
-  /* Does not cause resources to be taken */
-  int (*available)(log_id_t logId);
-  int (*version)(struct android_log_logger* logger,
-                 struct android_log_transport_context* transp);
-  /* Release resources taken by the following interfaces */
-  void (*close)(struct android_log_logger_list* logger_list,
-                struct android_log_transport_context* transp);
-  /*
-   * Expect all to instantiate open automagically on any call,
-   * so we do not have an explicit open call.
-   */
-  int (*read)(struct android_log_logger_list* logger_list,
-              struct android_log_transport_context* transp,
-              struct log_msg* log_msg);
-  /* Must only be called if not ANDROID_LOG_NONBLOCK (blocking) */
-  int (*poll)(struct android_log_logger_list* logger_list,
-              struct android_log_transport_context* transp);
-
-  int (*clear)(struct android_log_logger* logger,
-               struct android_log_transport_context* transp);
-  ssize_t (*setSize)(struct android_log_logger* logger,
-                     struct android_log_transport_context* transp, size_t size);
-  ssize_t (*getSize)(struct android_log_logger* logger,
-                     struct android_log_transport_context* transp);
-  ssize_t (*getReadableSize)(struct android_log_logger* logger,
-                             struct android_log_transport_context* transp);
-
-  ssize_t (*getPrune)(struct android_log_logger_list* logger_list,
-                      struct android_log_transport_context* transp, char* buf,
-                      size_t len);
-  ssize_t (*setPrune)(struct android_log_logger_list* logger_list,
-                      struct android_log_transport_context* transp, char* buf,
-                      size_t len);
-  ssize_t (*getStats)(struct android_log_logger_list* logger_list,
-                      struct android_log_transport_context* transp, char* buf,
-                      size_t len);
-};
-
-struct android_log_logger_list {
-  struct listnode logger;
-  struct listnode transport;
+struct logger_list {
+  atomic_int fd;
   int mode;
   unsigned int tail;
   log_time start;
   pid_t pid;
+  uint32_t log_mask;
 };
 
-struct android_log_logger {
-  struct listnode node;
-  struct android_log_logger_list* parent;
+// Format for a 'logger' entry: uintptr_t where only the bottom 32 bits are used.
+// bit 31: Set if this 'logger' is for logd.
+// bit 30: Set if this 'logger' is for pmsg
+// bits 0-2: the decimal value of the log buffer.
+// Other bits are unused.
 
-  log_id_t logId;
-};
+#define LOGGER_LOGD (1U << 31)
+#define LOGGER_PMSG (1U << 30)
+#define LOGGER_LOG_ID_MASK ((1U << 3) - 1)
 
-struct android_log_transport_context {
-  struct listnode node;
-  union android_log_context_union context; /* zero init per-transport context */
-  struct android_log_logger_list* parent;
-
-  struct android_log_transport_read* transport;
-  unsigned logMask;      /* mask of requested log buffers */
-  int ret;               /* return value associated with following data */
-  struct log_msg logMsg; /* peek at upcoming data, valid if logMsg.len != 0 */
-};
-
-/* assumes caller has structures read-locked, single threaded, or fenced */
-#define transport_context_for_each(transp, logger_list)                          \
-  for ((transp) = node_to_item((logger_list)->transport.next,                    \
-                               struct android_log_transport_context, node);      \
-       ((transp) != node_to_item(&(logger_list)->transport,                      \
-                                 struct android_log_transport_context, node)) && \
-       ((transp)->parent == (logger_list));                                      \
-       (transp) = node_to_item((transp)->node.next,                              \
-                               struct android_log_transport_context, node))
-
-#define logger_for_each(logp, logger_list)                          \
-  for ((logp) = node_to_item((logger_list)->logger.next,            \
-                             struct android_log_logger, node);      \
-       ((logp) != node_to_item(&(logger_list)->logger,              \
-                               struct android_log_logger, node)) && \
-       ((logp)->parent == (logger_list));                           \
-       (logp) =                                                     \
-           node_to_item((logp)->node.next, struct android_log_logger, node))
+inline bool android_logger_is_logd(struct logger* logger) {
+  return reinterpret_cast<uintptr_t>(logger) & LOGGER_LOGD;
+}
 
 /* OS specific dribs and drabs */
 
@@ -159,6 +87,4 @@
 int __android_log_trylock();
 void __android_log_unlock();
 
-extern int __android_log_transport;
-
 __END_DECLS
diff --git a/liblog/logger_read.cpp b/liblog/logger_read.cpp
index 4cf0846..0d383ff 100644
--- a/liblog/logger_read.cpp
+++ b/liblog/logger_read.cpp
@@ -21,6 +21,7 @@
 #include <pthread.h>
 #include <sched.h>
 #include <stddef.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
@@ -29,257 +30,50 @@
 #include <cutils/list.h>
 #include <private/android_filesystem_config.h>
 
-#include "config_read.h"
 #include "log_portability.h"
+#include "logd_reader.h"
 #include "logger.h"
-
-/* android_logger_alloc unimplemented, no use case */
-/* android_logger_free not exported */
-static void android_logger_free(struct logger* logger) {
-  struct android_log_logger* logger_internal = (struct android_log_logger*)logger;
-
-  if (!logger_internal) {
-    return;
-  }
-
-  list_remove(&logger_internal->node);
-
-  free(logger_internal);
-}
-
-/* android_logger_alloc unimplemented, no use case */
+#include "pmsg_reader.h"
 
 /* method for getting the associated sublog id */
 log_id_t android_logger_get_id(struct logger* logger) {
-  return ((struct android_log_logger*)logger)->logId;
+  return static_cast<log_id_t>(reinterpret_cast<uintptr_t>(logger) & LOGGER_LOG_ID_MASK);
 }
 
-static int init_transport_context(struct android_log_logger_list* logger_list) {
-  struct android_log_transport_read* transport;
-  struct listnode* node;
-
+static struct logger_list* android_logger_list_alloc_internal(int mode, unsigned int tail,
+                                                              log_time start, pid_t pid) {
+  auto* logger_list = static_cast<struct logger_list*>(calloc(1, sizeof(struct logger_list)));
   if (!logger_list) {
-    return -EINVAL;
+    return nullptr;
   }
 
-  if (list_empty(&logger_list->logger)) {
-    return -EINVAL;
-  }
-
-  if (!list_empty(&logger_list->transport)) {
-    return 0;
-  }
-
-  __android_log_lock();
-  /* mini __write_to_log_initialize() to populate transports */
-  if (list_empty(&__android_log_transport_read) && list_empty(&__android_log_persist_read)) {
-    __android_log_config_read();
-  }
-  __android_log_unlock();
-
-  node = (logger_list->mode & ANDROID_LOG_PSTORE) ? &__android_log_persist_read
-                                                  : &__android_log_transport_read;
-
-  read_transport_for_each(transport, node) {
-    struct android_log_transport_context* transp;
-    struct android_log_logger* logger;
-    unsigned logMask = 0;
-
-    logger_for_each(logger, logger_list) {
-      log_id_t logId = logger->logId;
-
-      if ((logId == LOG_ID_SECURITY) && (__android_log_uid() != AID_SYSTEM)) {
-        continue;
-      }
-      if (transport->read && (!transport->available || (transport->available(logId) >= 0))) {
-        logMask |= 1 << logId;
-      }
-    }
-    if (!logMask) {
-      continue;
-    }
-    transp = static_cast<android_log_transport_context*>(calloc(1, sizeof(*transp)));
-    if (!transp) {
-      return -ENOMEM;
-    }
-    transp->parent = logger_list;
-    transp->transport = transport;
-    transp->logMask = logMask;
-    transp->ret = 1;
-    list_add_tail(&logger_list->transport, &transp->node);
-  }
-  if (list_empty(&logger_list->transport)) {
-    return -ENODEV;
-  }
-  return 0;
-}
-
-#define LOGGER_FUNCTION(logger, def, func, args...)                                  \
-  ssize_t ret = -EINVAL;                                                             \
-  struct android_log_transport_context* transp;                                      \
-  struct android_log_logger* logger_internal = (struct android_log_logger*)(logger); \
-                                                                                     \
-  if (!logger_internal) {                                                            \
-    return ret;                                                                      \
-  }                                                                                  \
-  ret = init_transport_context(logger_internal->parent);                             \
-  if (ret < 0) {                                                                     \
-    return ret;                                                                      \
-  }                                                                                  \
-                                                                                     \
-  ret = (def);                                                                       \
-  transport_context_for_each(transp, logger_internal->parent) {                      \
-    if ((transp->logMask & (1 << logger_internal->logId)) && transp->transport &&    \
-        transp->transport->func) {                                                   \
-      ssize_t retval = (transp->transport->func)(logger_internal, transp, ##args);   \
-      if ((ret >= 0) || (ret == (def))) {                                            \
-        ret = retval;                                                                \
-      }                                                                              \
-    }                                                                                \
-  }                                                                                  \
-  return ret
-
-int android_logger_clear(struct logger* logger) {
-  LOGGER_FUNCTION(logger, -ENODEV, clear);
-}
-
-/* returns the total size of the log's ring buffer */
-long android_logger_get_log_size(struct logger* logger) {
-  LOGGER_FUNCTION(logger, -ENODEV, getSize);
-}
-
-int android_logger_set_log_size(struct logger* logger, unsigned long size) {
-  LOGGER_FUNCTION(logger, -ENODEV, setSize, size);
-}
-
-/*
- * returns the readable size of the log's ring buffer (that is, amount of the
- * log consumed)
- */
-long android_logger_get_log_readable_size(struct logger* logger) {
-  LOGGER_FUNCTION(logger, -ENODEV, getReadableSize);
-}
-
-/*
- * returns the logger version
- */
-int android_logger_get_log_version(struct logger* logger) {
-  LOGGER_FUNCTION(logger, 4, version);
-}
-
-#define LOGGER_LIST_FUNCTION(logger_list, def, func, args...)                           \
-  struct android_log_transport_context* transp;                                         \
-  struct android_log_logger_list* logger_list_internal =                                \
-      (struct android_log_logger_list*)(logger_list);                                   \
-                                                                                        \
-  ssize_t ret = init_transport_context(logger_list_internal);                           \
-  if (ret < 0) {                                                                        \
-    return ret;                                                                         \
-  }                                                                                     \
-                                                                                        \
-  ret = (def);                                                                          \
-  transport_context_for_each(transp, logger_list_internal) {                            \
-    if (transp->transport && (transp->transport->func)) {                               \
-      ssize_t retval = (transp->transport->func)(logger_list_internal, transp, ##args); \
-      if ((ret >= 0) || (ret == (def))) {                                               \
-        ret = retval;                                                                   \
-      }                                                                                 \
-    }                                                                                   \
-  }                                                                                     \
-  return ret
-
-/*
- * returns statistics
- */
-ssize_t android_logger_get_statistics(struct logger_list* logger_list, char* buf, size_t len) {
-  LOGGER_LIST_FUNCTION(logger_list, -ENODEV, getStats, buf, len);
-}
-
-ssize_t android_logger_get_prune_list(struct logger_list* logger_list, char* buf, size_t len) {
-  LOGGER_LIST_FUNCTION(logger_list, -ENODEV, getPrune, buf, len);
-}
-
-int android_logger_set_prune_list(struct logger_list* logger_list, char* buf, size_t len) {
-  LOGGER_LIST_FUNCTION(logger_list, -ENODEV, setPrune, buf, len);
-}
-
-struct logger_list* android_logger_list_alloc(int mode, unsigned int tail, pid_t pid) {
-  struct android_log_logger_list* logger_list;
-
-  logger_list = static_cast<android_log_logger_list*>(calloc(1, sizeof(*logger_list)));
-  if (!logger_list) {
-    return NULL;
-  }
-
-  list_init(&logger_list->logger);
-  list_init(&logger_list->transport);
   logger_list->mode = mode;
+  logger_list->start = start;
   logger_list->tail = tail;
   logger_list->pid = pid;
 
-  return (struct logger_list*)logger_list;
+  return logger_list;
+}
+
+struct logger_list* android_logger_list_alloc(int mode, unsigned int tail, pid_t pid) {
+  return android_logger_list_alloc_internal(mode, tail, log_time(0, 0), pid);
 }
 
 struct logger_list* android_logger_list_alloc_time(int mode, log_time start, pid_t pid) {
-  struct android_log_logger_list* logger_list;
-
-  logger_list = static_cast<android_log_logger_list*>(calloc(1, sizeof(*logger_list)));
-  if (!logger_list) {
-    return NULL;
-  }
-
-  list_init(&logger_list->logger);
-  list_init(&logger_list->transport);
-  logger_list->mode = mode;
-  logger_list->start = start;
-  logger_list->pid = pid;
-
-  return (struct logger_list*)logger_list;
+  return android_logger_list_alloc_internal(mode, 0, start, pid);
 }
 
-/* android_logger_list_register unimplemented, no use case */
-/* android_logger_list_unregister unimplemented, no use case */
-
 /* Open the named log and add it to the logger list */
 struct logger* android_logger_open(struct logger_list* logger_list, log_id_t logId) {
-  struct android_log_logger_list* logger_list_internal =
-      (struct android_log_logger_list*)logger_list;
-  struct android_log_logger* logger;
-
-  if (!logger_list_internal || (logId >= LOG_ID_MAX)) {
-    goto err;
+  if (!logger_list || (logId >= LOG_ID_MAX)) {
+    return nullptr;
   }
 
-  logger_for_each(logger, logger_list_internal) {
-    if (logger->logId == logId) {
-      goto ok;
-    }
-  }
+  logger_list->log_mask |= 1 << logId;
 
-  logger = static_cast<android_log_logger*>(calloc(1, sizeof(*logger)));
-  if (!logger) {
-    goto err;
-  }
-
-  logger->logId = logId;
-  list_add_tail(&logger_list_internal->logger, &logger->node);
-  logger->parent = logger_list_internal;
-
-  /* Reset known transports to re-evaluate, we just added one */
-  while (!list_empty(&logger_list_internal->transport)) {
-    struct listnode* node = list_head(&logger_list_internal->transport);
-    struct android_log_transport_context* transp =
-        node_to_item(node, struct android_log_transport_context, node);
-
-    list_remove(&transp->node);
-    free(transp);
-  }
-  goto ok;
-
-err:
-  logger = NULL;
-ok:
-  return (struct logger*)logger;
+  uintptr_t logger = logId;
+  logger |= (logger_list->mode & ANDROID_LOG_PSTORE) ? LOGGER_PMSG : LOGGER_LOGD;
+  return reinterpret_cast<struct logger*>(logger);
 }
 
 /* Open the single named log and make it part of a new logger list */
@@ -299,162 +93,58 @@
   return logger_list;
 }
 
-/* Validate log_msg packet, read function has already been null checked */
-static int android_transport_read(struct android_log_logger_list* logger_list,
-                                  struct android_log_transport_context* transp,
-                                  struct log_msg* log_msg) {
-  int ret = (*transp->transport->read)(logger_list, transp, log_msg);
+int android_logger_list_read(struct logger_list* logger_list, struct log_msg* log_msg) {
+  if (logger_list == nullptr || logger_list->log_mask == 0) {
+    return -EINVAL;
+  }
+
+  int ret = 0;
+
+#if (FAKE_LOG_DEVICE == 0)
+  if (logger_list->mode & ANDROID_LOG_PSTORE) {
+    ret = PmsgRead(logger_list, log_msg);
+  } else {
+    ret = LogdRead(logger_list, log_msg);
+  }
+#endif
+
+  if (ret <= 0) {
+    return ret;
+  }
 
   if (ret > (int)sizeof(*log_msg)) {
     ret = sizeof(*log_msg);
   }
 
-  transp->ret = ret;
-
-  /* propagate errors, or make sure len & hdr_size members visible */
-  if (ret < (int)(sizeof(log_msg->entry.len) + sizeof(log_msg->entry.hdr_size))) {
-    if (ret >= (int)sizeof(log_msg->entry.len)) {
-      log_msg->entry.len = 0;
-    }
-    return ret;
-  }
-
-  /* hdr_size correction (logger_entry -> logger_entry_v2+ conversion) */
-  if (log_msg->entry_v2.hdr_size == 0) {
-    log_msg->entry_v2.hdr_size = sizeof(struct logger_entry);
-  }
-  if ((log_msg->entry_v2.hdr_size < sizeof(log_msg->entry_v1)) ||
-      (log_msg->entry_v2.hdr_size > sizeof(log_msg->entry))) {
+  if (ret < static_cast<int>(sizeof(log_msg->entry))) {
     return -EINVAL;
   }
 
-  /* len validation */
-  if (ret <= log_msg->entry_v2.hdr_size) {
-    log_msg->entry.len = 0;
-  } else {
-    log_msg->entry.len = ret - log_msg->entry_v2.hdr_size;
+  if (log_msg->entry.hdr_size < sizeof(log_msg->entry) ||
+      log_msg->entry.hdr_size >= sizeof(struct log_msg) - sizeof(log_msg->entry)) {
+    return -EINVAL;
+  }
+
+  if (log_msg->entry.len > ret - log_msg->entry.hdr_size) {
+    return -EINVAL;
   }
 
   return ret;
 }
 
-/* Read from the selected logs */
-int android_logger_list_read(struct logger_list* logger_list, struct log_msg* log_msg) {
-  struct android_log_transport_context* transp;
-  struct android_log_logger_list* logger_list_internal =
-      (struct android_log_logger_list*)logger_list;
-
-  int ret = init_transport_context(logger_list_internal);
-  if (ret < 0) {
-    return ret;
-  }
-
-  /* at least one transport */
-  transp = node_to_item(logger_list_internal->transport.next, struct android_log_transport_context,
-                        node);
-
-  /* more than one transport? */
-  if (transp->node.next != &logger_list_internal->transport) {
-    /* Poll and merge sort the entries if from multiple transports */
-    struct android_log_transport_context* oldest = NULL;
-    int ret;
-    int polled = 0;
-    do {
-      if (polled) {
-        sched_yield();
-      }
-      ret = -1000;
-      polled = 0;
-      do {
-        int retval = transp->ret;
-        if ((retval > 0) && !transp->logMsg.entry.len) {
-          if (!transp->transport->read) {
-            retval = transp->ret = 0;
-          } else if ((logger_list_internal->mode & ANDROID_LOG_NONBLOCK) ||
-                     !transp->transport->poll) {
-            retval = android_transport_read(logger_list_internal, transp, &transp->logMsg);
-          } else {
-            int pollval = (*transp->transport->poll)(logger_list_internal, transp);
-            if (pollval <= 0) {
-              sched_yield();
-              pollval = (*transp->transport->poll)(logger_list_internal, transp);
-            }
-            polled = 1;
-            if (pollval < 0) {
-              if ((pollval == -EINTR) || (pollval == -EAGAIN)) {
-                return -EAGAIN;
-              }
-              retval = transp->ret = pollval;
-            } else if (pollval > 0) {
-              retval = android_transport_read(logger_list_internal, transp, &transp->logMsg);
-            }
-          }
-        }
-        if (ret < retval) {
-          ret = retval;
-        }
-        if ((transp->ret > 0) && transp->logMsg.entry.len &&
-            (!oldest || (oldest->logMsg.entry.sec > transp->logMsg.entry.sec) ||
-             ((oldest->logMsg.entry.sec == transp->logMsg.entry.sec) &&
-              (oldest->logMsg.entry.nsec > transp->logMsg.entry.nsec)))) {
-          oldest = transp;
-        }
-        transp = node_to_item(transp->node.next, struct android_log_transport_context, node);
-      } while (transp != node_to_item(&logger_list_internal->transport,
-                                      struct android_log_transport_context, node));
-      if (!oldest && (logger_list_internal->mode & ANDROID_LOG_NONBLOCK)) {
-        return (ret < 0) ? ret : -EAGAIN;
-      }
-      transp = node_to_item(logger_list_internal->transport.next,
-                            struct android_log_transport_context, node);
-    } while (!oldest && (ret > 0));
-    if (!oldest) {
-      return ret;
-    }
-    // ret is a positive value less than sizeof(struct log_msg)
-    ret = oldest->ret;
-    if (ret < oldest->logMsg.entry.hdr_size) {
-      // zero truncated header fields.
-      memset(
-          log_msg, 0,
-          (oldest->logMsg.entry.hdr_size > sizeof(oldest->logMsg) ? sizeof(oldest->logMsg)
-                                                                  : oldest->logMsg.entry.hdr_size));
-    }
-    memcpy(log_msg, &oldest->logMsg, ret);
-    oldest->logMsg.entry.len = 0; /* Mark it as copied */
-    return ret;
-  }
-
-  /* if only one, no need to copy into transport_context and merge-sort */
-  return android_transport_read(logger_list_internal, transp, log_msg);
-}
-
 /* Close all the logs */
 void android_logger_list_free(struct logger_list* logger_list) {
-  struct android_log_logger_list* logger_list_internal =
-      (struct android_log_logger_list*)logger_list;
-
-  if (logger_list_internal == NULL) {
+  if (logger_list == NULL) {
     return;
   }
 
-  while (!list_empty(&logger_list_internal->transport)) {
-    struct listnode* node = list_head(&logger_list_internal->transport);
-    struct android_log_transport_context* transp =
-        node_to_item(node, struct android_log_transport_context, node);
-
-    if (transp->transport && transp->transport->close) {
-      (*transp->transport->close)(logger_list_internal, transp);
-    }
-    list_remove(&transp->node);
-    free(transp);
+#if (FAKE_LOG_DEVICE == 0)
+  if (logger_list->mode & ANDROID_LOG_PSTORE) {
+    PmsgClose(logger_list);
+  } else {
+    LogdClose(logger_list);
   }
+#endif
 
-  while (!list_empty(&logger_list_internal->logger)) {
-    struct listnode* node = list_head(&logger_list_internal->logger);
-    struct android_log_logger* logger = node_to_item(node, struct android_log_logger, node);
-    android_logger_free((struct logger*)logger);
-  }
-
-  free(logger_list_internal);
+  free(logger_list);
 }
diff --git a/liblog/logger_write.cpp b/liblog/logger_write.cpp
index a4b3cd7..e1772f1 100644
--- a/liblog/logger_write.cpp
+++ b/liblog/logger_write.cpp
@@ -25,28 +25,31 @@
 #endif
 
 #include <log/event_tag_map.h>
-#include <log/log_transport.h>
 #include <private/android_filesystem_config.h>
 #include <private/android_logger.h>
 
-#include "config_read.h" /* __android_log_config_read_close() definition */
-#include "config_write.h"
 #include "log_portability.h"
 #include "logger.h"
 #include "uio.h"
 
 #define LOG_BUF_SIZE 1024
 
+#if (FAKE_LOG_DEVICE == 0)
+extern struct android_log_transport_write logdLoggerWrite;
+extern struct android_log_transport_write pmsgLoggerWrite;
+
+android_log_transport_write* android_log_write = &logdLoggerWrite;
+android_log_transport_write* android_log_persist_write = &pmsgLoggerWrite;
+#else
+extern android_log_transport_write fakeLoggerWrite;
+
+android_log_transport_write* android_log_write = &fakeLoggerWrite;
+android_log_transport_write* android_log_persist_write = nullptr;
+#endif
+
 static int __write_to_log_init(log_id_t, struct iovec* vec, size_t nr);
 static int (*write_to_log)(log_id_t, struct iovec* vec, size_t nr) = __write_to_log_init;
 
-/*
- * This is used by the C++ code to decide if it should write logs through
- * the C code.  Basically, if /dev/socket/logd is available, we're running in
- * the simulator rather than a desktop tool and want to use the device.
- */
-static enum { kLogUninitialized, kLogNotAvailable, kLogAvailable } g_log_status = kLogUninitialized;
-
 static int check_log_uid_permissions() {
 #if defined(__ANDROID__)
   uid_t uid = __android_log_uid();
@@ -97,30 +100,13 @@
   }
 
   for (i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
-    if (node->write && (i != LOG_ID_KERNEL) &&
-        ((i != LOG_ID_SECURITY) || (check_log_uid_permissions() == 0)) &&
-        (!node->available || ((*node->available)(static_cast<log_id_t>(i)) >= 0))) {
+    if (i != LOG_ID_KERNEL && (i != LOG_ID_SECURITY || check_log_uid_permissions() == 0) &&
+        (*node->available)(static_cast<log_id_t>(i)) >= 0) {
       node->logMask |= 1 << i;
     }
   }
 }
 
-extern "C" int __android_log_dev_available() {
-  struct android_log_transport_write* node;
-
-  if (list_empty(&__android_log_transport_write)) {
-    return kLogUninitialized;
-  }
-
-  write_transport_for_each(node, &__android_log_transport_write) {
-    __android_log_cache_available(node);
-    if (node->logMask) {
-      return kLogAvailable;
-    }
-  }
-  return kLogNotAvailable;
-}
-
 #if defined(__ANDROID__)
 static atomic_uintptr_t tagMap;
 #endif
@@ -129,7 +115,6 @@
  * Release any logger resources. A new log write will immediately re-acquire.
  */
 void __android_log_close() {
-  struct android_log_transport_write* transport;
 #if defined(__ANDROID__)
   EventTagMap* m;
 #endif
@@ -148,20 +133,14 @@
    * disengenuous use of this function.
    */
 
-  write_transport_for_each(transport, &__android_log_persist_write) {
-    if (transport->close) {
-      (*transport->close)();
-    }
+  if (android_log_write != nullptr) {
+    android_log_write->close();
   }
 
-  write_transport_for_each(transport, &__android_log_transport_write) {
-    if (transport->close) {
-      (*transport->close)();
-    }
+  if (android_log_persist_write != nullptr) {
+    android_log_persist_write->close();
   }
 
-  __android_log_config_write_close();
-
 #if defined(__ANDROID__)
   /*
    * Additional risk here somewhat mitigated by immediately unlock flushing
@@ -185,69 +164,39 @@
 #endif
 }
 
+static bool transport_initialize(android_log_transport_write* transport) {
+  if (transport == nullptr) {
+    return false;
+  }
+
+  __android_log_cache_available(transport);
+  if (!transport->logMask) {
+    return false;
+  }
+
+  // TODO: Do we actually need to call close() if open() fails?
+  if (transport->open() < 0) {
+    transport->close();
+    return false;
+  }
+
+  return true;
+}
+
 /* log_init_lock assumed */
 static int __write_to_log_initialize() {
-  struct android_log_transport_write* transport;
-  struct listnode* n;
-  int i = 0, ret = 0;
-
-  __android_log_config_write();
-  write_transport_for_each_safe(transport, n, &__android_log_transport_write) {
-    __android_log_cache_available(transport);
-    if (!transport->logMask) {
-      list_remove(&transport->node);
-      continue;
-    }
-    if (!transport->open || ((*transport->open)() < 0)) {
-      if (transport->close) {
-        (*transport->close)();
-      }
-      list_remove(&transport->node);
-      continue;
-    }
-    ++ret;
-  }
-  write_transport_for_each_safe(transport, n, &__android_log_persist_write) {
-    __android_log_cache_available(transport);
-    if (!transport->logMask) {
-      list_remove(&transport->node);
-      continue;
-    }
-    if (!transport->open || ((*transport->open)() < 0)) {
-      if (transport->close) {
-        (*transport->close)();
-      }
-      list_remove(&transport->node);
-      continue;
-    }
-    ++i;
-  }
-  if (!ret && !i) {
+  if (!transport_initialize(android_log_write)) {
     return -ENODEV;
   }
 
-  return ret;
-}
+  transport_initialize(android_log_persist_write);
 
-/*
- * Extract a 4-byte value from a byte stream. le32toh open coded
- */
-static inline uint32_t get4LE(const uint8_t* src) {
-  return src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);
+  return 1;
 }
 
 static int __write_to_log_daemon(log_id_t log_id, struct iovec* vec, size_t nr) {
-  struct android_log_transport_write* node;
   int ret, save_errno;
   struct timespec ts;
-  size_t len, i;
-
-  for (len = i = 0; i < nr; ++i) {
-    len += vec[i].iov_len;
-  }
-  if (!len) {
-    return -EINVAL;
-  }
 
   save_errno = errno;
 #if defined(__ANDROID__)
@@ -303,7 +252,7 @@
       }
     }
     if (m && (m != (EventTagMap*)(uintptr_t)-1LL)) {
-      tag = android_lookupEventTag_len(m, &len, get4LE(static_cast<uint8_t*>(vec[0].iov_base)));
+      tag = android_lookupEventTag_len(m, &len, *static_cast<uint32_t*>(vec[0].iov_base));
     }
     ret = __android_log_is_loggable_len(ANDROID_LOG_INFO, tag, len, ANDROID_LOG_VERBOSE);
     if (f) { /* local copy marked for close */
@@ -314,30 +263,9 @@
       return -EPERM;
     }
   } else {
-    /* Validate the incoming tag, tag content can not split across iovec */
-    char prio = ANDROID_LOG_VERBOSE;
-    const char* tag = static_cast<const char*>(vec[0].iov_base);
-    size_t len = vec[0].iov_len;
-    if (!tag) {
-      len = 0;
-    }
-    if (len > 0) {
-      prio = *tag;
-      if (len > 1) {
-        --len;
-        ++tag;
-      } else {
-        len = vec[1].iov_len;
-        tag = ((const char*)vec[1].iov_base);
-        if (!tag) {
-          len = 0;
-        }
-      }
-    }
-    /* tag must be nul terminated */
-    if (tag && strnlen(tag, len) >= len) {
-      tag = NULL;
-    }
+    int prio = *static_cast<int*>(vec[0].iov_base);
+    const char* tag = static_cast<const char*>(vec[1].iov_base);
+    size_t len = vec[1].iov_len;
 
     if (!__android_log_is_loggable_len(prio, tag, len - 1, ANDROID_LOG_VERBOSE)) {
       errno = save_errno;
@@ -355,21 +283,18 @@
 #endif
 
   ret = 0;
-  i = 1 << log_id;
-  write_transport_for_each(node, &__android_log_transport_write) {
-    if (node->logMask & i) {
-      ssize_t retval;
-      retval = (*node->write)(log_id, &ts, vec, nr);
-      if (ret >= 0) {
-        ret = retval;
-      }
+  size_t i = 1 << log_id;
+
+  if (android_log_write != nullptr && (android_log_write->logMask & i)) {
+    ssize_t retval;
+    retval = android_log_write->write(log_id, &ts, vec, nr);
+    if (ret >= 0) {
+      ret = retval;
     }
   }
 
-  write_transport_for_each(node, &__android_log_persist_write) {
-    if (node->logMask & i) {
-      (void)(*node->write)(log_id, &ts, vec, nr);
-    }
+  if (android_log_persist_write != nullptr && (android_log_persist_write->logMask & i)) {
+    android_log_persist_write->write(log_id, &ts, vec, nr);
   }
 
   errno = save_errno;
@@ -385,9 +310,6 @@
     ret = __write_to_log_initialize();
     if (ret < 0) {
       __android_log_unlock();
-      if (!list_empty(&__android_log_persist_write)) {
-        __write_to_log_daemon(log_id, vec, nr);
-      }
       errno = save_errno;
       return ret;
     }
@@ -577,82 +499,3 @@
 
   return write_to_log(LOG_ID_SECURITY, vec, 4);
 }
-
-static int __write_to_log_null(log_id_t log_id, struct iovec* vec, size_t nr) {
-  size_t len, i;
-
-  if ((log_id < LOG_ID_MIN) || (log_id >= LOG_ID_MAX)) {
-    return -EINVAL;
-  }
-
-  for (len = i = 0; i < nr; ++i) {
-    len += vec[i].iov_len;
-  }
-  if (!len) {
-    return -EINVAL;
-  }
-  return len;
-}
-
-/* Following functions need access to our internal write_to_log status */
-
-int __android_log_transport;
-
-int android_set_log_transport(int transport_flag) {
-  int retval;
-
-  if (transport_flag < 0) {
-    return -EINVAL;
-  }
-
-  retval = LOGGER_NULL;
-
-  __android_log_lock();
-
-  if (transport_flag & LOGGER_NULL) {
-    write_to_log = __write_to_log_null;
-
-    __android_log_unlock();
-
-    return retval;
-  }
-
-  __android_log_transport &= LOGGER_LOGD | LOGGER_STDERR;
-
-  transport_flag &= LOGGER_LOGD | LOGGER_STDERR;
-
-  if (__android_log_transport != transport_flag) {
-    __android_log_transport = transport_flag;
-    __android_log_config_write_close();
-    __android_log_config_read_close();
-
-    write_to_log = __write_to_log_init;
-    /* generically we only expect these two values for write_to_log */
-  } else if ((write_to_log != __write_to_log_init) && (write_to_log != __write_to_log_daemon)) {
-    write_to_log = __write_to_log_init;
-  }
-
-  retval = __android_log_transport;
-
-  __android_log_unlock();
-
-  return retval;
-}
-
-int android_get_log_transport() {
-  int ret = LOGGER_DEFAULT;
-
-  __android_log_lock();
-  if (write_to_log == __write_to_log_null) {
-    ret = LOGGER_NULL;
-  } else {
-    __android_log_transport &= LOGGER_LOGD | LOGGER_STDERR;
-    ret = __android_log_transport;
-    if ((write_to_log != __write_to_log_init) && (write_to_log != __write_to_log_daemon)) {
-      ret = -EINVAL;
-    }
-  }
-  __android_log_unlock();
-
-  return ret;
-}
diff --git a/liblog/logprint.cpp b/liblog/logprint.cpp
index 3a54445..4b61828 100644
--- a/liblog/logprint.cpp
+++ b/liblog/logprint.cpp
@@ -35,8 +35,10 @@
 #include <wchar.h>
 
 #include <cutils/list.h>
+
 #include <log/log.h>
 #include <log/logprint.h>
+#include <private/android_logger.h>
 
 #include "log_portability.h"
 
@@ -291,8 +293,10 @@
   return 1;
 }
 
+#ifndef __MINGW32__
 static const char tz[] = "TZ";
 static const char utc[] = "UTC";
+#endif
 
 /**
  * Returns FORMAT_OFF on invalid string
@@ -528,18 +532,12 @@
 
   int i;
   char* msg = buf->msg;
-  struct logger_entry_v2* buf2 = (struct logger_entry_v2*)buf;
-  if (buf2->hdr_size) {
-    if ((buf2->hdr_size < sizeof(((struct log_msg*)NULL)->entry_v1)) ||
-        (buf2->hdr_size > sizeof(((struct log_msg*)NULL)->entry))) {
-      fprintf(stderr, "+++ LOG: entry illegal hdr_size\n");
-      return -1;
-    }
-    msg = ((char*)buf2) + buf2->hdr_size;
-    if (buf2->hdr_size >= sizeof(struct logger_entry_v4)) {
-      entry->uid = ((struct logger_entry_v4*)buf)->uid;
-    }
+  if (buf->hdr_size != sizeof(struct logger_entry)) {
+    fprintf(stderr, "+++ LOG: entry illegal hdr_size\n");
+    return -1;
   }
+  entry->uid = buf->uid;
+
   for (i = 1; i < buf->len; i++) {
     if (msg[i] == '\0') {
       if (msgStart == -1) {
@@ -580,24 +578,6 @@
   return 0;
 }
 
-/*
- * Extract a 4-byte value from a byte stream.
- */
-static inline uint32_t get4LE(const uint8_t* src) {
-  return src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);
-}
-
-/*
- * Extract an 8-byte value from a byte stream.
- */
-static inline uint64_t get8LE(const uint8_t* src) {
-  uint32_t low, high;
-
-  low = src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);
-  high = src[4] | (src[5] << 8) | (src[6] << 16) | (src[7] << 24);
-  return ((uint64_t)high << 32) | (uint64_t)low;
-}
-
 static bool findChar(const char** cp, size_t* len, int c) {
   while ((*len) && isspace(*(*cp))) {
     ++(*cp);
@@ -651,8 +631,7 @@
 
   if (eventDataLen < 1) return -1;
 
-  type = *eventData++;
-  eventDataLen--;
+  type = *eventData;
 
   cp = NULL;
   len = 0;
@@ -741,22 +720,24 @@
     case EVENT_TYPE_INT:
       /* 32-bit signed int */
       {
-        int32_t ival;
-
-        if (eventDataLen < 4) return -1;
-        ival = get4LE(eventData);
-        eventData += 4;
-        eventDataLen -= 4;
-
-        lval = ival;
+        if (eventDataLen < sizeof(android_event_int_t)) return -1;
+        auto* event_int = reinterpret_cast<const android_event_int_t*>(eventData);
+        lval = event_int->data;
+        eventData += sizeof(android_event_int_t);
+        eventDataLen -= sizeof(android_event_int_t);
       }
       goto pr_lval;
     case EVENT_TYPE_LONG:
       /* 64-bit signed long */
-      if (eventDataLen < 8) return -1;
-      lval = get8LE(eventData);
-      eventData += 8;
-      eventDataLen -= 8;
+      if (eventDataLen < sizeof(android_event_long_t)) {
+        return -1;
+      }
+      {
+        auto* event_long = reinterpret_cast<const android_event_long_t*>(eventData);
+        lval = event_long->data;
+      }
+      eventData += sizeof(android_event_long_t);
+      eventDataLen -= sizeof(android_event_long_t);
     pr_lval:
       outCount = snprintf(outBuf, outBufLen, "%" PRId64, lval);
       if (outCount < outBufLen) {
@@ -770,14 +751,11 @@
     case EVENT_TYPE_FLOAT:
       /* float */
       {
-        uint32_t ival;
-        float fval;
-
-        if (eventDataLen < 4) return -1;
-        ival = get4LE(eventData);
-        fval = *(float*)&ival;
-        eventData += 4;
-        eventDataLen -= 4;
+        if (eventDataLen < sizeof(android_event_float_t)) return -1;
+        auto* event_float = reinterpret_cast<const android_event_float_t*>(eventData);
+        float fval = event_float->data;
+        eventData += sizeof(android_event_int_t);
+        eventDataLen -= sizeof(android_event_int_t);
 
         outCount = snprintf(outBuf, outBufLen, "%f", fval);
         if (outCount < outBufLen) {
@@ -792,12 +770,11 @@
     case EVENT_TYPE_STRING:
       /* UTF-8 chars, not NULL-terminated */
       {
-        unsigned int strLen;
-
-        if (eventDataLen < 4) return -1;
-        strLen = get4LE(eventData);
-        eventData += 4;
-        eventDataLen -= 4;
+        if (eventDataLen < sizeof(android_event_string_t)) return -1;
+        auto* event_string = reinterpret_cast<const android_event_string_t*>(eventData);
+        unsigned int strLen = event_string->length;
+        eventData += sizeof(android_event_string_t);
+        eventDataLen -= sizeof(android_event_string_t);
 
         if (eventDataLen < strLen) {
           result = -1; /* mark truncated */
@@ -830,20 +807,19 @@
     case EVENT_TYPE_LIST:
       /* N items, all different types */
       {
-        unsigned char count;
-        int i;
+        if (eventDataLen < sizeof(android_event_list_t)) return -1;
+        auto* event_list = reinterpret_cast<const android_event_list_t*>(eventData);
 
-        if (eventDataLen < 1) return -1;
-
-        count = *eventData++;
-        eventDataLen--;
+        int8_t count = event_list->element_count;
+        eventData += sizeof(android_event_list_t);
+        eventDataLen -= sizeof(android_event_list_t);
 
         if (outBufLen <= 0) goto no_room;
 
         *outBuf++ = '[';
         outBufLen--;
 
-        for (i = 0; i < count; i++) {
+        for (int i = 0; i < count; i++) {
           result = android_log_printBinaryEvent(&eventData, &eventDataLen, &outBuf, &outBufLen,
                                                 fmtStr, fmtLen);
           if (result != 0) goto bail;
@@ -1011,32 +987,21 @@
   entry->pid = buf->pid;
   entry->tid = buf->tid;
 
-  /*
-   * Pull the tag out, fill in some additional details based on incoming
-   * buffer version (v3 adds lid, v4 adds uid).
-   */
   eventData = (const unsigned char*)buf->msg;
-  struct logger_entry_v2* buf2 = (struct logger_entry_v2*)buf;
-  if (buf2->hdr_size) {
-    if ((buf2->hdr_size < sizeof(((struct log_msg*)NULL)->entry_v1)) ||
-        (buf2->hdr_size > sizeof(((struct log_msg*)NULL)->entry))) {
-      fprintf(stderr, "+++ LOG: entry illegal hdr_size\n");
-      return -1;
-    }
-    eventData = ((unsigned char*)buf2) + buf2->hdr_size;
-    if ((buf2->hdr_size >= sizeof(struct logger_entry_v3)) &&
-        (((struct logger_entry_v3*)buf)->lid == LOG_ID_SECURITY)) {
-      entry->priority = ANDROID_LOG_WARN;
-    }
-    if (buf2->hdr_size >= sizeof(struct logger_entry_v4)) {
-      entry->uid = ((struct logger_entry_v4*)buf)->uid;
-    }
+  if (buf->hdr_size != sizeof(struct logger_entry)) {
+    fprintf(stderr, "+++ LOG: entry illegal hdr_size\n");
+    return -1;
   }
+  if (buf->lid == LOG_ID_SECURITY) {
+    entry->priority = ANDROID_LOG_WARN;
+  }
+  entry->uid = buf->uid;
   inCount = buf->len;
-  if (inCount < 4) return -1;
-  tagIndex = get4LE(eventData);
-  eventData += 4;
-  inCount -= 4;
+  if (inCount < sizeof(android_event_header_t)) return -1;
+  auto* event_header = reinterpret_cast<const android_event_header_t*>(eventData);
+  tagIndex = event_header->tag;
+  eventData += sizeof(android_event_header_t);
+  inCount -= sizeof(android_event_header_t);
 
   entry->tagLen = 0;
   entry->tag = NULL;
@@ -1086,9 +1051,6 @@
   if ((result == 1) && fmtStr) {
     /* We overflowed :-(, let's repaint the line w/o format dressings */
     eventData = (const unsigned char*)buf->msg;
-    if (buf2->hdr_size) {
-      eventData = ((unsigned char*)buf2) + buf2->hdr_size;
-    }
     eventData += 4;
     outBuf = messageBuf;
     outRemaining = messageBufLen - 1;
@@ -1189,6 +1151,7 @@
   return p - begin;
 }
 
+#ifdef __ANDROID__
 static char* readSeconds(char* e, struct timespec* t) {
   unsigned long multiplier;
   char* p;
@@ -1229,7 +1192,6 @@
   return (long long)now->tv_sec * NS_PER_SEC + now->tv_nsec;
 }
 
-#ifdef __ANDROID__
 static void convertMonotonic(struct timespec* result, const AndroidLogEntry* entry) {
   struct listnode* node;
   struct conversionList {
diff --git a/liblog/pmsg_reader.cpp b/liblog/pmsg_reader.cpp
index eaac97f..9390fec 100644
--- a/liblog/pmsg_reader.cpp
+++ b/liblog/pmsg_reader.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include "pmsg_reader.h"
+
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
@@ -24,125 +26,21 @@
 #include <private/android_filesystem_config.h>
 #include <private/android_logger.h>
 
-#include "config_read.h"
 #include "logger.h"
 
-static int pmsgAvailable(log_id_t logId);
-static int pmsgVersion(struct android_log_logger* logger,
-                       struct android_log_transport_context* transp);
-static int pmsgRead(struct android_log_logger_list* logger_list,
-                    struct android_log_transport_context* transp, struct log_msg* log_msg);
-static void pmsgClose(struct android_log_logger_list* logger_list,
-                      struct android_log_transport_context* transp);
-static int pmsgClear(struct android_log_logger* logger,
-                     struct android_log_transport_context* transp);
-
-struct android_log_transport_read pmsgLoggerRead = {
-    .node = {&pmsgLoggerRead.node, &pmsgLoggerRead.node},
-    .name = "pmsg",
-    .available = pmsgAvailable,
-    .version = pmsgVersion,
-    .read = pmsgRead,
-    .poll = NULL,
-    .close = pmsgClose,
-    .clear = pmsgClear,
-    .setSize = NULL,
-    .getSize = NULL,
-    .getReadableSize = NULL,
-    .getPrune = NULL,
-    .setPrune = NULL,
-    .getStats = NULL,
-};
-
-static int pmsgAvailable(log_id_t logId) {
-  if (logId > LOG_ID_SECURITY) {
-    return -EINVAL;
-  }
-  if (access("/dev/pmsg0", W_OK) == 0) {
-    return 0;
-  }
-  return -EBADF;
-}
-
-/* Determine the credentials of the caller */
-static bool uid_has_log_permission(uid_t uid) {
-  return (uid == AID_SYSTEM) || (uid == AID_LOG) || (uid == AID_ROOT) || (uid == AID_LOGD);
-}
-
-static uid_t get_best_effective_uid() {
-  uid_t euid;
-  uid_t uid;
-  gid_t gid;
-  ssize_t i;
-  static uid_t last_uid = (uid_t)-1;
-
-  if (last_uid != (uid_t)-1) {
-    return last_uid;
-  }
-  uid = __android_log_uid();
-  if (uid_has_log_permission(uid)) {
-    return last_uid = uid;
-  }
-  euid = geteuid();
-  if (uid_has_log_permission(euid)) {
-    return last_uid = euid;
-  }
-  gid = getgid();
-  if (uid_has_log_permission(gid)) {
-    return last_uid = gid;
-  }
-  gid = getegid();
-  if (uid_has_log_permission(gid)) {
-    return last_uid = gid;
-  }
-  i = getgroups((size_t)0, NULL);
-  if (i > 0) {
-    gid_t list[i];
-
-    getgroups(i, list);
-    while (--i >= 0) {
-      if (uid_has_log_permission(list[i])) {
-        return last_uid = list[i];
-      }
-    }
-  }
-  return last_uid = uid;
-}
-
-static int pmsgClear(struct android_log_logger* logger __unused,
-                     struct android_log_transport_context* transp __unused) {
-  if (uid_has_log_permission(get_best_effective_uid())) {
-    return unlink("/sys/fs/pstore/pmsg-ramoops-0");
-  }
-  errno = EPERM;
-  return -1;
-}
-
-/*
- * returns the logger version
- */
-static int pmsgVersion(struct android_log_logger* logger __unused,
-                       struct android_log_transport_context* transp __unused) {
-  return 4;
-}
-
-static int pmsgRead(struct android_log_logger_list* logger_list,
-                    struct android_log_transport_context* transp, struct log_msg* log_msg) {
+int PmsgRead(struct logger_list* logger_list, struct log_msg* log_msg) {
   ssize_t ret;
   off_t current, next;
-  uid_t uid;
-  struct android_log_logger* logger;
   struct __attribute__((__packed__)) {
     android_pmsg_log_header_t p;
     android_log_header_t l;
     uint8_t prio;
   } buf;
   static uint8_t preread_count;
-  bool is_system;
 
   memset(log_msg, 0, sizeof(*log_msg));
 
-  if (atomic_load(&transp->context.fd) <= 0) {
+  if (atomic_load(&logger_list->fd) <= 0) {
     int i, fd = open("/sys/fs/pstore/pmsg-ramoops-0", O_RDONLY | O_CLOEXEC);
 
     if (fd < 0) {
@@ -155,7 +53,7 @@
         return -errno;
       }
     }
-    i = atomic_exchange(&transp->context.fd, fd);
+    i = atomic_exchange(&logger_list->fd, fd);
     if ((i > 0) && (i != fd)) {
       close(i);
     }
@@ -166,7 +64,7 @@
     int fd;
 
     if (preread_count < sizeof(buf)) {
-      fd = atomic_load(&transp->context.fd);
+      fd = atomic_load(&logger_list->fd);
       if (fd <= 0) {
         return -EBADF;
       }
@@ -192,46 +90,39 @@
     }
     preread_count = 0;
 
-    if ((transp->logMask & (1 << buf.l.id)) &&
+    if ((logger_list->log_mask & (1 << buf.l.id)) &&
         ((!logger_list->start.tv_sec && !logger_list->start.tv_nsec) ||
          ((logger_list->start.tv_sec <= buf.l.realtime.tv_sec) &&
           ((logger_list->start.tv_sec != buf.l.realtime.tv_sec) ||
            (logger_list->start.tv_nsec <= buf.l.realtime.tv_nsec)))) &&
         (!logger_list->pid || (logger_list->pid == buf.p.pid))) {
-      uid = get_best_effective_uid();
-      is_system = uid_has_log_permission(uid);
-      if (is_system || (uid == buf.p.uid)) {
-        char* msg = is_system ? log_msg->entry_v4.msg : log_msg->entry_v3.msg;
-        *msg = buf.prio;
-        fd = atomic_load(&transp->context.fd);
-        if (fd <= 0) {
-          return -EBADF;
-        }
-        ret = TEMP_FAILURE_RETRY(read(fd, msg + sizeof(buf.prio), buf.p.len - sizeof(buf)));
-        if (ret < 0) {
-          return -errno;
-        }
-        if (ret != (ssize_t)(buf.p.len - sizeof(buf))) {
-          return -EIO;
-        }
-
-        log_msg->entry_v4.len = buf.p.len - sizeof(buf) + sizeof(buf.prio);
-        log_msg->entry_v4.hdr_size =
-            is_system ? sizeof(log_msg->entry_v4) : sizeof(log_msg->entry_v3);
-        log_msg->entry_v4.pid = buf.p.pid;
-        log_msg->entry_v4.tid = buf.l.tid;
-        log_msg->entry_v4.sec = buf.l.realtime.tv_sec;
-        log_msg->entry_v4.nsec = buf.l.realtime.tv_nsec;
-        log_msg->entry_v4.lid = buf.l.id;
-        if (is_system) {
-          log_msg->entry_v4.uid = buf.p.uid;
-        }
-
-        return ret + sizeof(buf.prio) + log_msg->entry_v4.hdr_size;
+      char* msg = log_msg->entry.msg;
+      *msg = buf.prio;
+      fd = atomic_load(&logger_list->fd);
+      if (fd <= 0) {
+        return -EBADF;
       }
+      ret = TEMP_FAILURE_RETRY(read(fd, msg + sizeof(buf.prio), buf.p.len - sizeof(buf)));
+      if (ret < 0) {
+        return -errno;
+      }
+      if (ret != (ssize_t)(buf.p.len - sizeof(buf))) {
+        return -EIO;
+      }
+
+      log_msg->entry.len = buf.p.len - sizeof(buf) + sizeof(buf.prio);
+      log_msg->entry.hdr_size = sizeof(log_msg->entry);
+      log_msg->entry.pid = buf.p.pid;
+      log_msg->entry.tid = buf.l.tid;
+      log_msg->entry.sec = buf.l.realtime.tv_sec;
+      log_msg->entry.nsec = buf.l.realtime.tv_nsec;
+      log_msg->entry.lid = buf.l.id;
+      log_msg->entry.uid = buf.p.uid;
+
+      return ret + sizeof(buf.prio) + log_msg->entry.hdr_size;
     }
 
-    fd = atomic_load(&transp->context.fd);
+    fd = atomic_load(&logger_list->fd);
     if (fd <= 0) {
       return -EBADF;
     }
@@ -239,7 +130,7 @@
     if (current < 0) {
       return -errno;
     }
-    fd = atomic_load(&transp->context.fd);
+    fd = atomic_load(&logger_list->fd);
     if (fd <= 0) {
       return -EBADF;
     }
@@ -253,9 +144,8 @@
   }
 }
 
-static void pmsgClose(struct android_log_logger_list* logger_list __unused,
-                      struct android_log_transport_context* transp) {
-  int fd = atomic_exchange(&transp->context.fd, 0);
+void PmsgClose(struct logger_list* logger_list) {
+  int fd = atomic_exchange(&logger_list->fd, 0);
   if (fd > 0) {
     close(fd);
   }
@@ -272,17 +162,10 @@
 ssize_t __android_log_pmsg_file_read(log_id_t logId, char prio, const char* prefix,
                                      __android_log_pmsg_file_read_fn fn, void* arg) {
   ssize_t ret;
-  struct android_log_logger_list logger_list;
-  struct android_log_transport_context transp;
+  struct logger_list logger_list;
   struct content {
     struct listnode node;
-    union {
-      struct logger_entry_v4 entry;
-      struct logger_entry_v4 entry_v4;
-      struct logger_entry_v3 entry_v3;
-      struct logger_entry_v2 entry_v2;
-      struct logger_entry entry_v1;
-    };
+    struct logger_entry entry;
   } * content;
   struct names {
     struct listnode node;
@@ -301,15 +184,14 @@
 
   /* Add just enough clues in logger_list and transp to make API function */
   memset(&logger_list, 0, sizeof(logger_list));
-  memset(&transp, 0, sizeof(transp));
 
   logger_list.mode = ANDROID_LOG_PSTORE | ANDROID_LOG_NONBLOCK | ANDROID_LOG_RDONLY;
-  transp.logMask = (unsigned)-1;
+  logger_list.log_mask = (unsigned)-1;
   if (logId != LOG_ID_ANY) {
-    transp.logMask = (1 << logId);
+    logger_list.log_mask = (1 << logId);
   }
-  transp.logMask &= ~((1 << LOG_ID_KERNEL) | (1 << LOG_ID_EVENTS) | (1 << LOG_ID_SECURITY));
-  if (!transp.logMask) {
+  logger_list.log_mask &= ~((1 << LOG_ID_KERNEL) | (1 << LOG_ID_EVENTS) | (1 << LOG_ID_SECURITY));
+  if (!logger_list.log_mask) {
     return -EINVAL;
   }
 
@@ -334,25 +216,26 @@
   }
 
   /* Read the file content */
-  while (pmsgRead(&logger_list, &transp, &transp.logMsg) > 0) {
+  log_msg log_msg;
+  while (PmsgRead(&logger_list, &log_msg) > 0) {
     const char* cp;
-    size_t hdr_size = transp.logMsg.entry.hdr_size ? transp.logMsg.entry.hdr_size
-                                                   : sizeof(transp.logMsg.entry_v1);
-    char* msg = (char*)&transp.logMsg + hdr_size;
+    size_t hdr_size = log_msg.entry.hdr_size;
+
+    char* msg = (char*)&log_msg + hdr_size;
     const char* split = NULL;
 
-    if ((hdr_size < sizeof(transp.logMsg.entry_v1)) || (hdr_size > sizeof(transp.logMsg.entry))) {
+    if (hdr_size != sizeof(log_msg.entry)) {
       continue;
     }
     /* Check for invalid sequence number */
-    if ((transp.logMsg.entry.nsec % ANDROID_LOG_PMSG_FILE_SEQUENCE) ||
-        ((transp.logMsg.entry.nsec / ANDROID_LOG_PMSG_FILE_SEQUENCE) >=
-         ANDROID_LOG_PMSG_FILE_MAX_SEQUENCE)) {
+    if (log_msg.entry.nsec % ANDROID_LOG_PMSG_FILE_SEQUENCE ||
+        (log_msg.entry.nsec / ANDROID_LOG_PMSG_FILE_SEQUENCE) >=
+            ANDROID_LOG_PMSG_FILE_MAX_SEQUENCE) {
       continue;
     }
 
     /* Determine if it has <dirbase>:<filebase> format for tag */
-    len = transp.logMsg.entry.len - sizeof(prio);
+    len = log_msg.entry.len - sizeof(prio);
     for (cp = msg + sizeof(prio); *cp && isprint(*cp) && !isspace(*cp) && --len; ++cp) {
       if (*cp == ':') {
         if (split) {
@@ -398,8 +281,8 @@
     /* check if there is an existing entry */
     list_for_each(node, &name_list) {
       names = node_to_item(node, struct names, node);
-      if (!strcmp(names->name, msg + sizeof(prio)) && (names->id == transp.logMsg.entry.lid) &&
-          (names->prio == *msg)) {
+      if (!strcmp(names->name, msg + sizeof(prio)) && names->id == log_msg.entry.lid &&
+          names->prio == *msg) {
         break;
       }
     }
@@ -416,7 +299,7 @@
         break;
       }
       strcpy(names->name, msg + sizeof(prio));
-      names->id = static_cast<log_id_t>(transp.logMsg.entry.lid);
+      names->id = static_cast<log_id_t>(log_msg.entry.lid);
       names->prio = *msg;
       list_init(&names->content);
       /*
@@ -469,7 +352,7 @@
     /* Remove any file fragments that match our sequence number */
     list_for_each_safe(node, n, &names->content) {
       content = node_to_item(node, struct content, node);
-      if (transp.logMsg.entry.nsec == content->entry.nsec) {
+      if (log_msg.entry.nsec == content->entry.nsec) {
         list_remove(&content->node);
         free(content);
       }
@@ -477,22 +360,22 @@
 
     /* Add content */
     content = static_cast<struct content*>(
-        calloc(1, sizeof(content->node) + hdr_size + transp.logMsg.entry.len));
+        calloc(1, sizeof(content->node) + hdr_size + log_msg.entry.len));
     if (!content) {
       ret = -ENOMEM;
       break;
     }
-    memcpy(&content->entry, &transp.logMsg.entry, hdr_size + transp.logMsg.entry.len);
+    memcpy(&content->entry, &log_msg.entry, hdr_size + log_msg.entry.len);
 
     /* Insert in sequence number sorted order, to ease reconstruction */
     list_for_each_reverse(node, &names->content) {
-      if ((node_to_item(node, struct content, node))->entry.nsec < transp.logMsg.entry.nsec) {
+      if ((node_to_item(node, struct content, node))->entry.nsec < log_msg.entry.nsec) {
         break;
       }
     }
     list_add_head(node, &content->node);
   }
-  pmsgClose(&logger_list, &transp);
+  PmsgClose(&logger_list);
 
   /* Progress through all the collected files */
   list_for_each_safe(node, n, &name_list) {
diff --git a/adb/daemon/set_verity_enable_state_service.h b/liblog/pmsg_reader.h
similarity index 67%
rename from adb/daemon/set_verity_enable_state_service.h
rename to liblog/pmsg_reader.h
index c0ed98e..53746d8 100644
--- a/adb/daemon/set_verity_enable_state_service.h
+++ b/liblog/pmsg_reader.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
+ * Copyright 2019 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,14 @@
 
 #pragma once
 
-#include "adb_unique_fd.h"
+#include <unistd.h>
 
-#if defined(__ANDROID__)
-void set_verity_enabled_state_service(unique_fd fd, bool enable);
-#endif
+#include "log/log_read.h"
+#include "log_portability.h"
+
+__BEGIN_DECLS
+
+int PmsgRead(struct logger_list* logger_list, struct log_msg* log_msg);
+void PmsgClose(struct logger_list* logger_list);
+
+__END_DECLS
diff --git a/liblog/pmsg_writer.cpp b/liblog/pmsg_writer.cpp
index 4632b32..54980d9 100644
--- a/liblog/pmsg_writer.cpp
+++ b/liblog/pmsg_writer.cpp
@@ -29,7 +29,6 @@
 #include <private/android_filesystem_config.h>
 #include <private/android_logger.h>
 
-#include "config_write.h"
 #include "log_portability.h"
 #include "logger.h"
 #include "uio.h"
@@ -40,9 +39,9 @@
 static int pmsgWrite(log_id_t logId, struct timespec* ts, struct iovec* vec, size_t nr);
 
 struct android_log_transport_write pmsgLoggerWrite = {
-    .node = {&pmsgLoggerWrite.node, &pmsgLoggerWrite.node},
-    .context.fd = -1,
     .name = "pmsg",
+    .logMask = 0,
+    .context.fd = -1,
     .available = pmsgAvailable,
     .open = pmsgOpen,
     .close = pmsgClose,
@@ -87,13 +86,6 @@
   return 1;
 }
 
-/*
- * Extract a 4-byte value from a byte stream.
- */
-static inline uint32_t get4LE(const uint8_t* src) {
-  return src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);
-}
-
 static int pmsgWrite(log_id_t logId, struct timespec* ts, struct iovec* vec, size_t nr) {
   static const unsigned headerLength = 2;
   struct iovec newVec[nr + headerLength];
@@ -107,7 +99,7 @@
       return -EINVAL;
     }
 
-    if (SNET_EVENT_LOG_TAG != get4LE(static_cast<uint8_t*>(vec[0].iov_base))) {
+    if (SNET_EVENT_LOG_TAG != *static_cast<uint32_t*>(vec[0].iov_base)) {
       return -EPERM;
     }
   }
diff --git a/liblog/stderr_write.cpp b/liblog/stderr_write.cpp
deleted file mode 100644
index e76673f..0000000
--- a/liblog/stderr_write.cpp
+++ /dev/null
@@ -1,209 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * stderr write handler.  Output is logcat-like, and responds to
- * logcat's environment variables ANDROID_PRINTF_LOG and
- * ANDROID_LOG_TAGS to filter output.
- *
- * This transport only provides a writer, that means that it does not
- * provide an End-To-End capability as the logs are effectively _lost_
- * to the stderr file stream.  The purpose of this transport is to
- * supply a means for command line tools to report their logging
- * to the stderr stream, in line with all other activities.
- */
-
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <log/event_tag_map.h>
-#include <log/log.h>
-#include <log/logprint.h>
-
-#include "log_portability.h"
-#include "logger.h"
-#include "uio.h"
-
-static int stderrOpen();
-static void stderrClose();
-static int stderrAvailable(log_id_t logId);
-static int stderrWrite(log_id_t logId, struct timespec* ts, struct iovec* vec, size_t nr);
-
-struct stderrContext {
-  AndroidLogFormat* logformat;
-#if defined(__ANDROID__)
-  EventTagMap* eventTagMap;
-#endif
-};
-
-struct android_log_transport_write stderrLoggerWrite = {
-    .node = {&stderrLoggerWrite.node, &stderrLoggerWrite.node},
-    .context.priv = NULL,
-    .name = "stderr",
-    .available = stderrAvailable,
-    .open = stderrOpen,
-    .close = stderrClose,
-    .write = stderrWrite,
-};
-
-static int stderrOpen() {
-  struct stderrContext* ctx;
-  const char* envStr;
-  bool setFormat;
-
-  if (!stderr || (fileno(stderr) < 0)) {
-    return -EBADF;
-  }
-
-  if (stderrLoggerWrite.context.priv) {
-    return fileno(stderr);
-  }
-
-  ctx = static_cast<stderrContext*>(calloc(1, sizeof(stderrContext)));
-  if (!ctx) {
-    return -ENOMEM;
-  }
-
-  ctx->logformat = android_log_format_new();
-  if (!ctx->logformat) {
-    free(ctx);
-    return -ENOMEM;
-  }
-
-  envStr = getenv("ANDROID_PRINTF_LOG");
-  setFormat = false;
-
-  if (envStr) {
-    char* formats = strdup(envStr);
-    char* sv = NULL;
-    char* arg = formats;
-    while (!!(arg = strtok_r(arg, ",:; \t\n\r\f", &sv))) {
-      AndroidLogPrintFormat format = android_log_formatFromString(arg);
-      arg = NULL;
-      if (format == FORMAT_OFF) {
-        continue;
-      }
-      if (android_log_setPrintFormat(ctx->logformat, format) <= 0) {
-        continue;
-      }
-      setFormat = true;
-    }
-    free(formats);
-  }
-  if (!setFormat) {
-    AndroidLogPrintFormat format = android_log_formatFromString("threadtime");
-    android_log_setPrintFormat(ctx->logformat, format);
-  }
-  envStr = getenv("ANDROID_LOG_TAGS");
-  if (envStr) {
-    android_log_addFilterString(ctx->logformat, envStr);
-  }
-  stderrLoggerWrite.context.priv = ctx;
-
-  return fileno(stderr);
-}
-
-static void stderrClose() {
-  stderrContext* ctx = static_cast<stderrContext*>(stderrLoggerWrite.context.priv);
-
-  if (ctx) {
-    stderrLoggerWrite.context.priv = NULL;
-    if (ctx->logformat) {
-      android_log_format_free(ctx->logformat);
-      ctx->logformat = NULL;
-    }
-#if defined(__ANDROID__)
-    if (ctx->eventTagMap) {
-      android_closeEventTagMap(ctx->eventTagMap);
-      ctx->eventTagMap = NULL;
-    }
-#endif
-  }
-}
-
-static int stderrAvailable(log_id_t logId) {
-  if ((logId >= LOG_ID_MAX) || (logId == LOG_ID_KERNEL)) {
-    return -EINVAL;
-  }
-  return 1;
-}
-
-static int stderrWrite(log_id_t logId, struct timespec* ts, struct iovec* vec, size_t nr) {
-  struct log_msg log_msg;
-  AndroidLogEntry entry;
-  char binaryMsgBuf[1024];
-  int err;
-  size_t i;
-  stderrContext* ctx = static_cast<stderrContext*>(stderrLoggerWrite.context.priv);
-
-  if (!ctx) return -EBADF;
-  if (!vec || !nr) return -EINVAL;
-
-  log_msg.entry.len = 0;
-  log_msg.entry.hdr_size = sizeof(log_msg.entry);
-  log_msg.entry.pid = getpid();
-#ifdef __BIONIC__
-  log_msg.entry.tid = gettid();
-#else
-  log_msg.entry.tid = getpid();
-#endif
-  log_msg.entry.sec = ts->tv_sec;
-  log_msg.entry.nsec = ts->tv_nsec;
-  log_msg.entry.lid = logId;
-  log_msg.entry.uid = __android_log_uid();
-
-  for (i = 0; i < nr; ++i) {
-    size_t len = vec[i].iov_len;
-    if ((log_msg.entry.len + len) > LOGGER_ENTRY_MAX_PAYLOAD) {
-      len = LOGGER_ENTRY_MAX_PAYLOAD - log_msg.entry.len;
-    }
-    if (!len) continue;
-    memcpy(log_msg.entry.msg + log_msg.entry.len, vec[i].iov_base, len);
-    log_msg.entry.len += len;
-  }
-
-  if ((logId == LOG_ID_EVENTS) || (logId == LOG_ID_SECURITY)) {
-#if defined(__ANDROID__)
-    if (!ctx->eventTagMap) {
-      ctx->eventTagMap = android_openEventTagMap(NULL);
-    }
-#endif
-    err = android_log_processBinaryLogBuffer(&log_msg.entry_v1, &entry,
-#if defined(__ANDROID__)
-                                             ctx->eventTagMap,
-#else
-                                             NULL,
-#endif
-                                             binaryMsgBuf, sizeof(binaryMsgBuf));
-  } else {
-    err = android_log_processLogBuffer(&log_msg.entry_v1, &entry);
-  }
-
-  /* print known truncated data, in essence logcat --debug */
-  if ((err < 0) && !entry.message) return -EINVAL;
-
-  if (!android_log_shouldPrintLine(ctx->logformat, entry.tag, entry.priority)) {
-    return log_msg.entry.len;
-  }
-
-  err = android_log_printLogLine(ctx->logformat, fileno(stderr), &entry);
-  if (err < 0) return errno ? -errno : -EINVAL;
-  return log_msg.entry.len;
-}
diff --git a/liblog/tests/Android.bp b/liblog/tests/Android.bp
index d9d1a21..99df4ca 100644
--- a/liblog/tests/Android.bp
+++ b/liblog/tests/Android.bp
@@ -54,8 +54,7 @@
     ],
     srcs: [
         "libc_test.cpp",
-        "liblog_test_default.cpp",
-        "liblog_test_stderr.cpp",
+        "liblog_test.cpp",
         "log_id_test.cpp",
         "log_radio_test.cpp",
         "log_read_test.cpp",
@@ -69,6 +68,7 @@
         "libbase",
     ],
     static_libs: ["liblog"],
+    isolated: true,
 }
 
 // Build tests for the device (with .so). Run with:
@@ -96,3 +96,11 @@
         "vts",
     ],
 }
+
+cc_test_host {
+    name: "liblog-host-test",
+    static_libs: ["liblog"],
+    shared_libs: ["libbase"],
+    srcs: ["liblog_host_test.cpp"],
+    isolated: true,
+}
diff --git a/liblog/tests/liblog_benchmark.cpp b/liblog/tests/liblog_benchmark.cpp
index 21d12a1..39ac7a5 100644
--- a/liblog/tests/liblog_benchmark.cpp
+++ b/liblog/tests/liblog_benchmark.cpp
@@ -17,7 +17,7 @@
 #include <fcntl.h>
 #include <inttypes.h>
 #include <poll.h>
-#include <sys/endian.h>
+#include <sched.h>
 #include <sys/socket.h>
 #include <sys/syscall.h>
 #include <sys/types.h>
@@ -30,7 +30,6 @@
 #include <benchmark/benchmark.h>
 #include <cutils/sockets.h>
 #include <log/event_tag_map.h>
-#include <log/log_transport.h>
 #include <private/android_logger.h>
 
 BENCHMARK_MAIN();
@@ -74,21 +73,6 @@
 }
 BENCHMARK(BM_log_maximum);
 
-static void set_log_null() {
-  android_set_log_transport(LOGGER_NULL);
-}
-
-static void set_log_default() {
-  android_set_log_transport(LOGGER_DEFAULT);
-}
-
-static void BM_log_maximum_null(benchmark::State& state) {
-  set_log_null();
-  BM_log_maximum(state);
-  set_log_default();
-}
-BENCHMARK(BM_log_maximum_null);
-
 /*
  *	Measure the time it takes to collect the time using
  * discrete acquisition (state.PauseTiming() to state.ResumeTiming())
@@ -227,14 +211,14 @@
   buffer.header.tag = 0;
   buffer.payload.type = EVENT_TYPE_INT;
   uint32_t snapshot = 0;
-  buffer.payload.data = htole32(snapshot);
+  buffer.payload.data = snapshot;
 
   newVec[2].iov_base = &buffer;
   newVec[2].iov_len = sizeof(buffer);
 
   while (state.KeepRunning()) {
     ++snapshot;
-    buffer.payload.data = htole32(snapshot);
+    buffer.payload.data = snapshot;
     writev(pstore_fd, newVec, nr);
   }
   state.PauseTiming();
@@ -303,11 +287,11 @@
   buffer->payload.header.tag = 0;
   buffer->payload.payload.type = EVENT_TYPE_INT;
   uint32_t snapshot = 0;
-  buffer->payload.payload.data = htole32(snapshot);
+  buffer->payload.payload.data = snapshot;
 
   while (state.KeepRunning()) {
     ++snapshot;
-    buffer->payload.payload.data = htole32(snapshot);
+    buffer->payload.payload.data = snapshot;
     write(pstore_fd, &buffer->pmsg_header,
           sizeof(android_pmsg_log_header_t) + sizeof(android_log_header_t) +
               sizeof(android_log_event_int_t));
@@ -378,11 +362,11 @@
   buffer->payload.header.tag = 0;
   buffer->payload.payload.type = EVENT_TYPE_INT;
   uint32_t snapshot = 0;
-  buffer->payload.payload.data = htole32(snapshot);
+  buffer->payload.payload.data = snapshot;
 
   while (state.KeepRunning()) {
     ++snapshot;
-    buffer->payload.payload.data = htole32(snapshot);
+    buffer->payload.payload.data = snapshot;
     write(pstore_fd, &buffer->pmsg_header,
           sizeof(android_pmsg_log_header_t) + sizeof(android_log_header_t) +
               sizeof(android_log_event_int_t));
@@ -453,11 +437,11 @@
   buffer->payload.header.tag = 0;
   buffer->payload.payload.type = EVENT_TYPE_INT;
   uint32_t snapshot = 0;
-  buffer->payload.payload.data = htole32(snapshot);
+  buffer->payload.payload.data = snapshot;
 
   while (state.KeepRunning()) {
     ++snapshot;
-    buffer->payload.payload.data = htole32(snapshot);
+    buffer->payload.payload.data = snapshot;
     write(pstore_fd, &buffer->pmsg_header, LOGGER_ENTRY_MAX_PAYLOAD);
   }
   state.PauseTiming();
@@ -526,11 +510,11 @@
   buffer->payload.header.tag = 0;
   buffer->payload.payload.type = EVENT_TYPE_INT;
   uint32_t snapshot = 0;
-  buffer->payload.payload.data = htole32(snapshot);
+  buffer->payload.payload.data = snapshot;
 
   while (state.KeepRunning()) {
     ++snapshot;
-    buffer->payload.payload.data = htole32(snapshot);
+    buffer->payload.payload.data = snapshot;
     write(pstore_fd, &buffer->pmsg_header, LOGGER_ENTRY_MAX_PAYLOAD);
   }
   state.PauseTiming();
@@ -619,13 +603,6 @@
 }
 BENCHMARK(BM_log_event_overhead_42);
 
-static void BM_log_event_overhead_null(benchmark::State& state) {
-  set_log_null();
-  BM_log_event_overhead(state);
-  set_log_default();
-}
-BENCHMARK(BM_log_event_overhead_null);
-
 /*
  *	Measure the time it takes to submit the android event logging call
  * using discrete acquisition under very-light load (<1% CPU utilization).
@@ -640,15 +617,6 @@
 }
 BENCHMARK(BM_log_light_overhead);
 
-static void BM_log_light_overhead_null(benchmark::State& state) {
-  set_log_null();
-  BM_log_light_overhead(state);
-  set_log_default();
-}
-// Default gets out of hand for this test, so we set a reasonable number of
-// iterations for a timely result.
-BENCHMARK(BM_log_light_overhead_null)->Iterations(500);
-
 static void caught_latency(int /*signum*/) {
   unsigned long long v = 0xDEADBEEFA55A5AA5ULL;
 
@@ -945,7 +913,7 @@
 }
 BENCHMARK(BM_lookupEventTagNum);
 
-// Must be functionally identical to liblog internal __send_log_msg.
+// Must be functionally identical to liblog internal SendLogdControlMessage()
 static void send_to_control(char* buf, size_t len) {
   int sock =
       socket_local_client("logd", ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM | SOCK_CLOEXEC);
diff --git a/liblog/tests/liblog_host_test.cpp b/liblog/tests/liblog_host_test.cpp
new file mode 100644
index 0000000..377550f
--- /dev/null
+++ b/liblog/tests/liblog_host_test.cpp
@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <log/log.h>
+#include <private/android_logger.h>
+
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+#include <android-base/test_utils.h>
+#include <gtest/gtest.h>
+
+using android::base::StringPrintf;
+using android::base::StringReplace;
+
+void GenerateLogContent() {
+  __android_log_buf_print(LOG_ID_MAIN, ANDROID_LOG_VERBOSE, "tag", "verbose main");
+  __android_log_buf_print(LOG_ID_MAIN, ANDROID_LOG_INFO, "tag", "info main");
+  __android_log_buf_print(LOG_ID_MAIN, ANDROID_LOG_ERROR, "tag", "error main");
+
+  __android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_VERBOSE, "tag", "verbose radio");
+  __android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_INFO, "tag", "info radio");
+  __android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_ERROR, "tag", "error radio");
+
+  __android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_VERBOSE, "tag", "verbose system");
+  __android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_INFO, "tag", "info system");
+  __android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_ERROR, "tag", "error system");
+
+  __android_log_buf_print(LOG_ID_CRASH, ANDROID_LOG_VERBOSE, "tag", "verbose crash");
+  __android_log_buf_print(LOG_ID_CRASH, ANDROID_LOG_INFO, "tag", "info crash");
+  __android_log_buf_print(LOG_ID_CRASH, ANDROID_LOG_ERROR, "tag", "error crash");
+}
+
+std::string GetPidString() {
+  int pid = getpid();
+  return StringPrintf("%5d", pid);
+}
+
+TEST(liblog, default_write) {
+  setenv("ANDROID_PRINTF_LOG", "brief", true);
+  CapturedStderr captured_stderr;
+
+  GenerateLogContent();
+
+  std::string expected_output = StringReplace(R"init(I/tag     (<pid>): info main
+E/tag     (<pid>): error main
+I/tag     (<pid>): info radio
+E/tag     (<pid>): error radio
+I/tag     (<pid>): info system
+E/tag     (<pid>): error system
+I/tag     (<pid>): info crash
+E/tag     (<pid>): error crash
+)init",
+                                              "<pid>", GetPidString(), true);
+
+  EXPECT_EQ(expected_output, captured_stderr.str());
+}
+
+TEST(liblog, format) {
+  setenv("ANDROID_PRINTF_LOG", "process", true);
+  CapturedStderr captured_stderr;
+
+  GenerateLogContent();
+
+  std::string expected_output = StringReplace(R"init(I(<pid>) info main  (tag)
+E(<pid>) error main  (tag)
+I(<pid>) info radio  (tag)
+E(<pid>) error radio  (tag)
+I(<pid>) info system  (tag)
+E(<pid>) error system  (tag)
+I(<pid>) info crash  (tag)
+E(<pid>) error crash  (tag)
+)init",
+                                              "<pid>", GetPidString(), true);
+
+  EXPECT_EQ(expected_output, captured_stderr.str());
+  captured_stderr.Stop();
+  captured_stderr.Reset();
+  captured_stderr.Start();
+
+  // Changing the environment after starting writing doesn't change the format.
+  setenv("ANDROID_PRINTF_LOG", "brief", true);
+  GenerateLogContent();
+  EXPECT_EQ(expected_output, captured_stderr.str());
+  captured_stderr.Stop();
+  captured_stderr.Reset();
+  captured_stderr.Start();
+
+  // However calling __android_log_close() does reset logging and allow changing the format.
+  __android_log_close();
+  GenerateLogContent();
+
+  expected_output = StringReplace(R"init(I/tag     (<pid>): info main
+E/tag     (<pid>): error main
+I/tag     (<pid>): info radio
+E/tag     (<pid>): error radio
+I/tag     (<pid>): info system
+E/tag     (<pid>): error system
+I/tag     (<pid>): info crash
+E/tag     (<pid>): error crash
+)init",
+                                  "<pid>", GetPidString(), true);
+
+  EXPECT_EQ(expected_output, captured_stderr.str());
+}
+
+TEST(liblog, filter) {
+  setenv("ANDROID_PRINTF_LOG", "brief", true);
+  setenv("ANDROID_LOG_TAGS", "*:w verbose_tag:v debug_tag:d", true);
+  CapturedStderr captured_stderr;
+
+  auto generate_logs = [](log_id_t log_id) {
+    // Check that we show verbose logs when requesting for a given tag.
+    __android_log_buf_print(log_id, ANDROID_LOG_VERBOSE, "verbose_tag", "verbose verbose_tag");
+    __android_log_buf_print(log_id, ANDROID_LOG_ERROR, "verbose_tag", "error verbose_tag");
+
+    // Check that we don't show verbose logs when explicitly requesting debug+ for a given tag.
+    __android_log_buf_print(log_id, ANDROID_LOG_VERBOSE, "debug_tag", "verbose debug_tag");
+    __android_log_buf_print(log_id, ANDROID_LOG_DEBUG, "debug_tag", "debug debug_tag");
+    __android_log_buf_print(log_id, ANDROID_LOG_ERROR, "debug_tag", "error debug_tag");
+
+    // Check that we don't show info logs when requesting globally warn+.
+    __android_log_buf_print(log_id, ANDROID_LOG_INFO, "default_tag", "info default_tag");
+    __android_log_buf_print(log_id, ANDROID_LOG_WARN, "default_tag", "warn default_tag");
+    __android_log_buf_print(log_id, ANDROID_LOG_ERROR, "default_tag", "error default_tag");
+  };
+
+  auto expected_output = StringReplace(R"init(V/verbose_tag(<pid>): verbose verbose_tag
+E/verbose_tag(<pid>): error verbose_tag
+D/debug_tag(<pid>): debug debug_tag
+E/debug_tag(<pid>): error debug_tag
+W/default_tag(<pid>): warn default_tag
+E/default_tag(<pid>): error default_tag
+)init",
+                                       "<pid>", GetPidString(), true);
+
+  auto test_all_logs = [&] {
+    for (auto log_id : {LOG_ID_MAIN, LOG_ID_SYSTEM, LOG_ID_RADIO, LOG_ID_CRASH}) {
+      generate_logs(log_id);
+      EXPECT_EQ(expected_output, captured_stderr.str());
+      captured_stderr.Stop();
+      captured_stderr.Reset();
+      captured_stderr.Start();
+    }
+  };
+
+  test_all_logs();
+
+  // Changing the environment after starting writing doesn't change the filter.
+  setenv("ANDROID_LOG_TAGS", "*:e", true);
+  test_all_logs();
+
+  // However calling __android_log_close() does reset logging and allow changing the format.
+  __android_log_close();
+  expected_output = StringReplace(R"init(E/verbose_tag(<pid>): error verbose_tag
+E/debug_tag(<pid>): error debug_tag
+E/default_tag(<pid>): error default_tag
+)init",
+                                  "<pid>", GetPidString(), true);
+  test_all_logs();
+}
+
+TEST(liblog, kernel_no_write) {
+  CapturedStderr captured_stderr;
+  __android_log_buf_print(LOG_ID_KERNEL, ANDROID_LOG_ERROR, "tag", "kernel error");
+  EXPECT_EQ("", captured_stderr.str());
+}
+
+TEST(liblog, binary_no_write) {
+  CapturedStderr captured_stderr;
+  __android_log_buf_print(LOG_ID_EVENTS, ANDROID_LOG_ERROR, "tag", "error events");
+  __android_log_buf_print(LOG_ID_STATS, ANDROID_LOG_ERROR, "tag", "error stats");
+  __android_log_buf_print(LOG_ID_SECURITY, ANDROID_LOG_ERROR, "tag", "error security");
+
+  __android_log_bswrite(0x12, "events");
+  __android_log_stats_bwrite(0x34, "stats", strlen("stats"));
+  __android_log_security_bswrite(0x56, "security");
+
+  EXPECT_EQ("", captured_stderr.str());
+}
diff --git a/liblog/tests/liblog_test.cpp b/liblog/tests/liblog_test.cpp
index 1f87b3e..c402e20 100644
--- a/liblog/tests/liblog_test.cpp
+++ b/liblog/tests/liblog_test.cpp
@@ -27,10 +27,12 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#include <memory>
 #include <string>
 
 #include <android-base/file.h>
 #include <android-base/macros.h>
+#include <android-base/scopeguard.h>
 #include <android-base/stringprintf.h>
 #ifdef __ANDROID__  // includes sys/properties.h which does not exist outside
 #include <cutils/properties.h>
@@ -38,25 +40,13 @@
 #include <gtest/gtest.h>
 #include <log/log_event_list.h>
 #include <log/log_properties.h>
-#include <log/log_transport.h>
 #include <log/logprint.h>
 #include <private/android_filesystem_config.h>
 #include <private/android_logger.h>
 
-#ifndef TEST_PREFIX
-#ifdef TEST_LOGGER
-#define TEST_PREFIX android_set_log_transport(TEST_LOGGER);
-// make sure we always run code despite overrides if compiled for android
-#elif defined(__ANDROID__)
-#define TEST_PREFIX
-#endif
-#endif
+using android::base::make_scope_guard;
 
-#ifdef USING_LOGGER_STDERR
-#define SUPPORTS_END_TO_END 0
-#else
-#define SUPPORTS_END_TO_END 1
-#endif
+// #define ENABLE_FLAKY_TESTS
 
 // enhanced version of LOG_FAILURE_RETRY to add support for EAGAIN and
 // non-syscall libs. Since we are only using this in the emergency of
@@ -72,24 +62,93 @@
     _rc;                                                                 \
   })
 
+// std::unique_ptr doesn't let you provide a pointer to a deleter (android_logger_list_close()) if
+// the type (struct logger_list) is an incomplete type, so we create ListCloser instead.
+struct ListCloser {
+  void operator()(struct logger_list* list) { android_logger_list_close(list); }
+};
+
+// This function is meant to be used for most log tests, it does the following:
+// 1) Open the log_buffer with a blocking reader
+// 2) Write the messages via write_messages
+// 3) Set an alarm for 2 seconds as a timeout
+// 4) Read until check_message returns true, which should be used to indicate the target message
+//    is found
+// 5) Open log_buffer with a non_blocking reader and dump all messages
+// 6) Count the number of times check_messages returns true for these messages and assert it's
+//    only 1.
+template <typename FWrite, typename FCheck>
+static void RunLogTests(log_id_t log_buffer, FWrite write_messages, FCheck check_message) {
+  pid_t pid = getpid();
+
+  auto logger_list = std::unique_ptr<struct logger_list, ListCloser>{
+      android_logger_list_open(log_buffer, ANDROID_LOG_RDONLY, 1000, pid)};
+  ASSERT_TRUE(logger_list);
+
+  write_messages();
+
+  alarm(2);
+  auto alarm_guard = android::base::make_scope_guard([] { alarm(0); });
+  bool found = false;
+  while (!found) {
+    log_msg log_msg;
+    ASSERT_GT(android_logger_list_read(logger_list.get(), &log_msg), 0);
+
+    ASSERT_EQ(log_buffer, log_msg.id());
+    ASSERT_EQ(pid, log_msg.entry.pid);
+
+    // TODO: Should this be an assert?
+    if (log_msg.msg() == nullptr) {
+      continue;
+    }
+
+    check_message(log_msg, &found);
+  }
+
+  auto logger_list_non_block = std::unique_ptr<struct logger_list, ListCloser>{
+      android_logger_list_open(log_buffer, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)};
+  ASSERT_TRUE(logger_list_non_block);
+
+  size_t count = 0;
+  while (true) {
+    log_msg log_msg;
+    auto ret = android_logger_list_read(logger_list_non_block.get(), &log_msg);
+    if (ret == -EAGAIN) {
+      break;
+    }
+    ASSERT_GT(ret, 0);
+
+    ASSERT_EQ(log_buffer, log_msg.id());
+    ASSERT_EQ(pid, log_msg.entry.pid);
+
+    // TODO: Should this be an assert?
+    if (log_msg.msg() == nullptr) {
+      continue;
+    }
+
+    found = false;
+    check_message(log_msg, &found);
+    if (found) {
+      ++count;
+    }
+  }
+
+  EXPECT_EQ(1U, count);
+}
+
 TEST(liblog, __android_log_btwrite) {
-#ifdef TEST_PREFIX
-  TEST_PREFIX
-#endif
   int intBuf = 0xDEADBEEF;
   EXPECT_LT(0,
             __android_log_btwrite(0, EVENT_TYPE_INT, &intBuf, sizeof(intBuf)));
   long long longBuf = 0xDEADBEEFA55A5AA5;
   EXPECT_LT(
       0, __android_log_btwrite(0, EVENT_TYPE_LONG, &longBuf, sizeof(longBuf)));
-  usleep(1000);
   char Buf[] = "\20\0\0\0DeAdBeEfA55a5aA5";
   EXPECT_LT(0,
             __android_log_btwrite(0, EVENT_TYPE_STRING, Buf, sizeof(Buf) - 1));
-  usleep(1000);
 }
 
-#if (defined(__ANDROID__) && defined(USING_LOGGER_DEFAULT))
+#if defined(__ANDROID__)
 static std::string popenToString(const std::string& command) {
   std::string ret;
 
@@ -160,80 +219,60 @@
 
 TEST(liblog, __android_log_btwrite__android_logger_list_read) {
 #ifdef __ANDROID__
-#ifdef TEST_PREFIX
-  TEST_PREFIX
-#endif
-  struct logger_list* logger_list;
-
-  pid_t pid = getpid();
-
-  ASSERT_TRUE(NULL !=
-              (logger_list = android_logger_list_open(
-                   LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK,
-                   1000, pid)));
-
   log_time ts(CLOCK_MONOTONIC);
-  EXPECT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
-#ifdef USING_LOGGER_DEFAULT
-  // Check that we can close and reopen the logger
-  bool logdwActiveAfter__android_log_btwrite;
-  if (getuid() == AID_ROOT) {
-    tested__android_log_close = true;
-#ifndef NO_PSTORE
-    bool pmsgActiveAfter__android_log_btwrite = isPmsgActive();
-    EXPECT_TRUE(pmsgActiveAfter__android_log_btwrite);
-#endif /* NO_PSTORE */
-    logdwActiveAfter__android_log_btwrite = isLogdwActive();
-    EXPECT_TRUE(logdwActiveAfter__android_log_btwrite);
-  } else if (!tested__android_log_close) {
-    fprintf(stderr, "WARNING: can not test __android_log_close()\n");
-  }
-  __android_log_close();
-  if (getuid() == AID_ROOT) {
-#ifndef NO_PSTORE
-    bool pmsgActiveAfter__android_log_close = isPmsgActive();
-    EXPECT_FALSE(pmsgActiveAfter__android_log_close);
-#endif /* NO_PSTORE */
-    bool logdwActiveAfter__android_log_close = isLogdwActive();
-    EXPECT_FALSE(logdwActiveAfter__android_log_close);
-  }
-#endif
+  log_time ts1(ts);
 
-  log_time ts1(CLOCK_MONOTONIC);
-  EXPECT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts1, sizeof(ts1)));
-#ifdef USING_LOGGER_DEFAULT
-  if (getuid() == AID_ROOT) {
+  auto write_function = [&] {
+    EXPECT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
+    // Check that we can close and reopen the logger
+    bool logdwActiveAfter__android_log_btwrite;
+    if (getuid() == AID_ROOT) {
+      tested__android_log_close = true;
 #ifndef NO_PSTORE
-    bool pmsgActiveAfter__android_log_btwrite = isPmsgActive();
-    EXPECT_TRUE(pmsgActiveAfter__android_log_btwrite);
+      bool pmsgActiveAfter__android_log_btwrite = isPmsgActive();
+      EXPECT_TRUE(pmsgActiveAfter__android_log_btwrite);
 #endif /* NO_PSTORE */
-    logdwActiveAfter__android_log_btwrite = isLogdwActive();
-    EXPECT_TRUE(logdwActiveAfter__android_log_btwrite);
-  }
-#endif
-  usleep(1000000);
+      logdwActiveAfter__android_log_btwrite = isLogdwActive();
+      EXPECT_TRUE(logdwActiveAfter__android_log_btwrite);
+    } else if (!tested__android_log_close) {
+      fprintf(stderr, "WARNING: can not test __android_log_close()\n");
+    }
+    __android_log_close();
+    if (getuid() == AID_ROOT) {
+#ifndef NO_PSTORE
+      bool pmsgActiveAfter__android_log_close = isPmsgActive();
+      EXPECT_FALSE(pmsgActiveAfter__android_log_close);
+#endif /* NO_PSTORE */
+      bool logdwActiveAfter__android_log_close = isLogdwActive();
+      EXPECT_FALSE(logdwActiveAfter__android_log_close);
+    }
+
+    ts1 = log_time(CLOCK_MONOTONIC);
+    EXPECT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts1, sizeof(ts1)));
+    if (getuid() == AID_ROOT) {
+#ifndef NO_PSTORE
+      bool pmsgActiveAfter__android_log_btwrite = isPmsgActive();
+      EXPECT_TRUE(pmsgActiveAfter__android_log_btwrite);
+#endif /* NO_PSTORE */
+      logdwActiveAfter__android_log_btwrite = isLogdwActive();
+      EXPECT_TRUE(logdwActiveAfter__android_log_btwrite);
+    }
+  };
 
   int count = 0;
   int second_count = 0;
 
-  for (;;) {
-    log_msg log_msg;
-    if (android_logger_list_read(logger_list, &log_msg) <= 0) {
-      break;
-    }
-
-    EXPECT_EQ(log_msg.entry.pid, pid);
-
+  auto check_function = [&](log_msg log_msg, bool* found) {
     if ((log_msg.entry.len != sizeof(android_log_event_long_t)) ||
         (log_msg.id() != LOG_ID_EVENTS)) {
-      continue;
+      return;
     }
 
     android_log_event_long_t* eventData;
     eventData = reinterpret_cast<android_log_event_long_t*>(log_msg.msg());
 
     if (!eventData || (eventData->payload.type != EVENT_TYPE_LONG)) {
-      continue;
+      return;
     }
 
     log_time tx(reinterpret_cast<char*>(&eventData->payload.data));
@@ -242,171 +281,61 @@
     } else if (ts1 == tx) {
       ++second_count;
     }
-  }
 
-  EXPECT_EQ(SUPPORTS_END_TO_END, count);
-  EXPECT_EQ(SUPPORTS_END_TO_END, second_count);
+    if (count == 1 && second_count == 1) {
+      count = 0;
+      second_count = 0;
+      *found = true;
+    }
+  };
 
-  android_logger_list_close(logger_list);
+  RunLogTests(LOG_ID_EVENTS, write_function, check_function);
+
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
 
+TEST(liblog, __android_log_write__android_logger_list_read) {
 #ifdef __ANDROID__
-static void print_transport(const char* prefix, int logger) {
-  static const char orstr[] = " | ";
-
-  if (!prefix) {
-    prefix = "";
-  }
-  if (logger < 0) {
-    fprintf(stderr, "%s%s\n", prefix, strerror(-logger));
-    return;
-  }
-
-  if (logger == LOGGER_DEFAULT) {
-    fprintf(stderr, "%sLOGGER_DEFAULT", prefix);
-    prefix = orstr;
-  }
-  if (logger & LOGGER_LOGD) {
-    fprintf(stderr, "%sLOGGER_LOGD", prefix);
-    prefix = orstr;
-  }
-  if (logger & LOGGER_KERNEL) {
-    fprintf(stderr, "%sLOGGER_KERNEL", prefix);
-    prefix = orstr;
-  }
-  if (logger & LOGGER_NULL) {
-    fprintf(stderr, "%sLOGGER_NULL", prefix);
-    prefix = orstr;
-  }
-  if (logger & LOGGER_STDERR) {
-    fprintf(stderr, "%sLOGGER_STDERR", prefix);
-    prefix = orstr;
-  }
-  logger &= ~(LOGGER_LOGD | LOGGER_KERNEL | LOGGER_NULL | LOGGER_STDERR);
-  if (logger) {
-    fprintf(stderr, "%s0x%x", prefix, logger);
-    prefix = orstr;
-  }
-  if (prefix == orstr) {
-    fprintf(stderr, "\n");
-  }
-}
-#endif
-
-// This test makes little sense standalone, and requires the tests ahead
-// and behind us, to make us whole.  We could incorporate a prefix and
-// suffix test to make this standalone, but opted to not complicate this.
-TEST(liblog, android_set_log_transport) {
-#ifdef __ANDROID__
-#ifdef TEST_PREFIX
-  TEST_PREFIX
-#endif
-
-  int logger = android_get_log_transport();
-  print_transport("android_get_log_transport = ", logger);
-  EXPECT_NE(LOGGER_NULL, logger);
-
-  int ret;
-  EXPECT_EQ(LOGGER_NULL, ret = android_set_log_transport(LOGGER_NULL));
-  print_transport("android_set_log_transport = ", ret);
-  EXPECT_EQ(LOGGER_NULL, ret = android_get_log_transport());
-  print_transport("android_get_log_transport = ", ret);
-
   pid_t pid = getpid();
 
-  struct logger_list* logger_list;
-  ASSERT_TRUE(NULL !=
-              (logger_list = android_logger_list_open(
-                   LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK,
-                   1000, pid)));
+  struct timespec ts;
+  clock_gettime(CLOCK_MONOTONIC, &ts);
+  std::string buf = android::base::StringPrintf("pid=%u ts=%ld.%09ld", pid, ts.tv_sec, ts.tv_nsec);
+  static const char tag[] = "liblog.__android_log_write__android_logger_list_read";
+  static const char prio = ANDROID_LOG_DEBUG;
 
-  log_time ts(CLOCK_MONOTONIC);
-  EXPECT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
+  std::string expected_message =
+      std::string(&prio, sizeof(prio)) + tag + std::string("", 1) + buf + std::string("", 1);
 
-  usleep(1000000);
+  auto write_function = [&] { ASSERT_LT(0, __android_log_write(prio, tag, buf.c_str())); };
 
-  int count = 0;
-
-  for (;;) {
-    log_msg log_msg;
-    if (android_logger_list_read(logger_list, &log_msg) <= 0) {
-      break;
+  auto check_function = [&](log_msg log_msg, bool* found) {
+    if (log_msg.entry.len != expected_message.length()) {
+      return;
     }
 
-    EXPECT_EQ(log_msg.entry.pid, pid);
-
-    if ((log_msg.entry.len != sizeof(android_log_event_long_t)) ||
-        (log_msg.id() != LOG_ID_EVENTS)) {
-      continue;
+    if (expected_message != std::string(log_msg.msg(), log_msg.entry.len)) {
+      return;
     }
 
-    android_log_event_long_t* eventData;
-    eventData = reinterpret_cast<android_log_event_long_t*>(log_msg.msg());
+    *found = true;
+  };
 
-    if (!eventData || (eventData->payload.type != EVENT_TYPE_LONG)) {
-      continue;
-    }
+  RunLogTests(LOG_ID_MAIN, write_function, check_function);
 
-    log_time tx(reinterpret_cast<char*>(&eventData->payload.data));
-    if (ts == tx) {
-      ++count;
-    }
-  }
-
-  android_logger_list_close(logger_list);
-
-  EXPECT_EQ(logger, ret = android_set_log_transport(logger));
-  print_transport("android_set_log_transport = ", ret);
-  EXPECT_EQ(logger, ret = android_get_log_transport());
-  print_transport("android_get_log_transport = ", ret);
-
-  // False negative if liblog.__android_log_btwrite__android_logger_list_read
-  // fails above, so we will likely succeed. But we will have so many
-  // failures elsewhere that it is probably not worthwhile for us to
-  // highlight yet another disappointment.
-  //
-  // We also expect failures in the following tests if the set does not
-  // react in an appropriate manner internally, yet passes, so we depend
-  // on this test being in the middle of a series of tests performed in
-  // the same process.
-  EXPECT_EQ(0, count);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
 
-#ifdef TEST_PREFIX
-static inline uint32_t get4LE(const uint8_t* src) {
-  return src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);
-}
-
-static inline uint32_t get4LE(const char* src) {
-  return get4LE(reinterpret_cast<const uint8_t*>(src));
-}
-#endif
-
 static void bswrite_test(const char* message) {
-#ifdef TEST_PREFIX
-  TEST_PREFIX
-  struct logger_list* logger_list;
-
+#ifdef __ANDROID__
   pid_t pid = getpid();
 
-  ASSERT_TRUE(NULL !=
-              (logger_list = android_logger_list_open(
-                   LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK,
-                   1000, pid)));
-
-#ifdef __ANDROID__
   log_time ts(android_log_clockid());
-#else
-  log_time ts(CLOCK_REALTIME);
-#endif
 
-  EXPECT_LT(0, __android_log_bswrite(0, message));
   size_t num_lines = 1, size = 0, length = 0, total = 0;
   const char* cp = message;
   while (*cp) {
@@ -428,36 +357,25 @@
     ++cp;
     ++total;
   }
-  usleep(1000000);
 
-  int count = 0;
+  auto write_function = [&] { EXPECT_LT(0, __android_log_bswrite(0, message)); };
 
-  for (;;) {
-    log_msg log_msg;
-    if (android_logger_list_read(logger_list, &log_msg) <= 0) {
-      break;
-    }
-
-    EXPECT_EQ(log_msg.entry.pid, pid);
-
-    if ((log_msg.entry.sec < (ts.tv_sec - 1)) ||
-        ((ts.tv_sec + 1) < log_msg.entry.sec) ||
-        ((size_t)log_msg.entry.len !=
-         (sizeof(android_log_event_string_t) + length)) ||
-        (log_msg.id() != LOG_ID_EVENTS)) {
-      continue;
+  auto check_function = [&](log_msg log_msg, bool* found) {
+    if ((size_t)log_msg.entry.len != (sizeof(android_log_event_string_t) + length) ||
+        log_msg.id() != LOG_ID_EVENTS) {
+      return;
     }
 
     android_log_event_string_t* eventData;
     eventData = reinterpret_cast<android_log_event_string_t*>(log_msg.msg());
 
     if (!eventData || (eventData->type != EVENT_TYPE_STRING)) {
-      continue;
+      return;
     }
 
-    size_t len = get4LE(reinterpret_cast<char*>(&eventData->length));
+    size_t len = eventData->length;
     if (len == total) {
-      ++count;
+      *found = true;
 
       AndroidLogFormat* logformat = android_log_format_new();
       EXPECT_TRUE(NULL != logformat);
@@ -467,7 +385,7 @@
         fprintf(stderr, "Expect \"Binary log entry conversion failed\"\n");
       }
       int processBinaryLogBuffer = android_log_processBinaryLogBuffer(
-          &log_msg.entry_v1, &entry, NULL, msgBuf, sizeof(msgBuf));
+          &log_msg.entry, &entry, nullptr, msgBuf, sizeof(msgBuf));
       EXPECT_EQ((length == total) ? 0 : -1, processBinaryLogBuffer);
       if ((processBinaryLogBuffer == 0) || entry.message) {
         size_t line_overhead = 20;
@@ -484,11 +402,10 @@
       }
       android_log_format_free(logformat);
     }
-  }
+  };
 
-  EXPECT_EQ(SUPPORTS_END_TO_END, count);
+  RunLogTests(LOG_ID_EVENTS, write_function, check_function);
 
-  android_logger_list_close(logger_list);
 #else
   message = NULL;
   GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -516,26 +433,15 @@
 }
 
 static void buf_write_test(const char* message) {
-#ifdef TEST_PREFIX
-  TEST_PREFIX
-  struct logger_list* logger_list;
-
+#ifdef __ANDROID__
   pid_t pid = getpid();
 
-  ASSERT_TRUE(
-      NULL !=
-      (logger_list = android_logger_list_open(
-           LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
-
   static const char tag[] = "TEST__android_log_buf_write";
-#ifdef __ANDROID__
   log_time ts(android_log_clockid());
-#else
-  log_time ts(CLOCK_REALTIME);
-#endif
 
-  EXPECT_LT(
-      0, __android_log_buf_write(LOG_ID_MAIN, ANDROID_LOG_INFO, tag, message));
+  auto write_function = [&] {
+    EXPECT_LT(0, __android_log_buf_write(LOG_ID_MAIN, ANDROID_LOG_INFO, tag, message));
+  };
   size_t num_lines = 1, size = 0, length = 0;
   const char* cp = message;
   while (*cp) {
@@ -552,32 +458,18 @@
     }
     ++cp;
   }
-  usleep(1000000);
 
-  int count = 0;
-
-  for (;;) {
-    log_msg log_msg;
-    if (android_logger_list_read(logger_list, &log_msg) <= 0) {
-      break;
+  auto check_function = [&](log_msg log_msg, bool* found) {
+    if ((size_t)log_msg.entry.len != (sizeof(tag) + length + 2) || log_msg.id() != LOG_ID_MAIN) {
+      return;
     }
 
-    ASSERT_EQ(log_msg.entry.pid, pid);
-
-    if ((log_msg.entry.sec < (ts.tv_sec - 1)) ||
-        ((ts.tv_sec + 1) < log_msg.entry.sec) ||
-        ((size_t)log_msg.entry.len != (sizeof(tag) + length + 2)) ||
-        (log_msg.id() != LOG_ID_MAIN)) {
-      continue;
-    }
-
-    ++count;
+    *found = true;
 
     AndroidLogFormat* logformat = android_log_format_new();
     EXPECT_TRUE(NULL != logformat);
     AndroidLogEntry entry;
-    int processLogBuffer =
-        android_log_processLogBuffer(&log_msg.entry_v1, &entry);
+    int processLogBuffer = android_log_processLogBuffer(&log_msg.entry, &entry);
     EXPECT_EQ(0, processLogBuffer);
     if (processLogBuffer == 0) {
       size_t line_overhead = 11;
@@ -588,11 +480,10 @@
                 android_log_printLogLine(logformat, fileno(stderr), &entry));
     }
     android_log_format_free(logformat);
-  }
+  };
 
-  EXPECT_EQ(SUPPORTS_END_TO_END, count);
+  RunLogTests(LOG_ID_MAIN, write_function, check_function);
 
-  android_logger_list_close(logger_list);
 #else
   message = NULL;
   GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -611,8 +502,8 @@
   buf_write_test("\n Hello World \n");
 }
 
-#ifdef USING_LOGGER_DEFAULT  // requires blocking reader functionality
-#ifdef TEST_PREFIX
+#ifdef ENABLE_FLAKY_TESTS
+#ifdef __ANDROID__
 static unsigned signaled;
 static log_time signal_time;
 
@@ -673,8 +564,7 @@
 #endif
 
 TEST(liblog, android_logger_list_read__cpu_signal) {
-#ifdef TEST_PREFIX
-  TEST_PREFIX
+#ifdef __ANDROID__
   struct logger_list* logger_list;
   unsigned long long v = 0xDEADBEEFA55A0000ULL;
 
@@ -766,7 +656,7 @@
 #endif
 }
 
-#ifdef TEST_PREFIX
+#ifdef __ANDROID__
 /*
  *  Strictly, we are not allowed to log messages in a signal context, the
  * correct way to handle this is to ensure the messages are constructed in
@@ -830,8 +720,7 @@
 #endif
 
 TEST(liblog, android_logger_list_read__cpu_thread) {
-#ifdef TEST_PREFIX
-  TEST_PREFIX
+#ifdef __ANDROID__
   struct logger_list* logger_list;
   unsigned long long v = 0xDEADBEAFA55A0000ULL;
 
@@ -923,13 +812,8 @@
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
-#endif  // USING_LOGGER_DEFAULT
+#endif  // ENABLE_FLAKY_TESTS
 
-#ifdef TEST_PREFIX
-static const char max_payload_tag[] = "TEST_max_payload_and_longish_tag_XXXX";
-#define SIZEOF_MAX_PAYLOAD_BUF \
-  (LOGGER_ENTRY_MAX_PAYLOAD - sizeof(max_payload_tag) - 1)
-#endif
 static const char max_payload_buf[] =
     "LEONATO\n\
 I learn in this letter that Don Peter of Arragon\n\
@@ -1063,39 +947,26 @@
 takes his leave.";
 
 TEST(liblog, max_payload) {
-#ifdef TEST_PREFIX
-  TEST_PREFIX
+#ifdef __ANDROID__
+  static const char max_payload_tag[] = "TEST_max_payload_and_longish_tag_XXXX";
+#define SIZEOF_MAX_PAYLOAD_BUF (LOGGER_ENTRY_MAX_PAYLOAD - sizeof(max_payload_tag) - 1)
+
   pid_t pid = getpid();
   char tag[sizeof(max_payload_tag)];
   memcpy(tag, max_payload_tag, sizeof(tag));
   snprintf(tag + sizeof(tag) - 5, 5, "%04X", pid & 0xFFFF);
 
-  LOG_FAILURE_RETRY(__android_log_buf_write(LOG_ID_SYSTEM, ANDROID_LOG_INFO,
-                                            tag, max_payload_buf));
-  sleep(2);
+  auto write_function = [&] {
+    LOG_FAILURE_RETRY(
+        __android_log_buf_write(LOG_ID_SYSTEM, ANDROID_LOG_INFO, tag, max_payload_buf));
+  };
 
-  struct logger_list* logger_list;
-
-  ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
-                           LOG_ID_SYSTEM, ANDROID_LOG_RDONLY, 100, 0)));
-
-  bool matches = false;
   ssize_t max_len = 0;
-
-  for (;;) {
-    log_msg log_msg;
-    if (android_logger_list_read(logger_list, &log_msg) <= 0) {
-      break;
-    }
-
-    if ((log_msg.entry.pid != pid) || (log_msg.id() != LOG_ID_SYSTEM)) {
-      continue;
-    }
-
+  auto check_function = [&](log_msg log_msg, bool* found) {
     char* data = log_msg.msg();
 
     if (!data || strcmp(++data, tag)) {
-      continue;
+      return;
     }
 
     data += strlen(data) + 1;
@@ -1112,71 +983,36 @@
     }
 
     if (max_len > 512) {
-      matches = true;
-      break;
+      *found = true;
     }
-  }
+  };
 
-  android_logger_list_close(logger_list);
-
-#if SUPPORTS_END_TO_END
-  EXPECT_EQ(true, matches);
+  RunLogTests(LOG_ID_SYSTEM, write_function, check_function);
 
   EXPECT_LE(SIZEOF_MAX_PAYLOAD_BUF, static_cast<size_t>(max_len));
 #else
-  EXPECT_EQ(false, matches);
-#endif
-#else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
 
 TEST(liblog, __android_log_buf_print__maxtag) {
-#ifdef TEST_PREFIX
-  TEST_PREFIX
-  struct logger_list* logger_list;
-
-  pid_t pid = getpid();
-
-  ASSERT_TRUE(
-      NULL !=
-      (logger_list = android_logger_list_open(
-           LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
-
 #ifdef __ANDROID__
-  log_time ts(android_log_clockid());
-#else
-  log_time ts(CLOCK_REALTIME);
-#endif
+  auto write_function = [&] {
+    EXPECT_LT(0, __android_log_buf_print(LOG_ID_MAIN, ANDROID_LOG_INFO, max_payload_buf,
+                                         max_payload_buf));
+  };
 
-  EXPECT_LT(0, __android_log_buf_print(LOG_ID_MAIN, ANDROID_LOG_INFO,
-                                       max_payload_buf, max_payload_buf));
-  usleep(1000000);
-
-  int count = 0;
-
-  for (;;) {
-    log_msg log_msg;
-    if (android_logger_list_read(logger_list, &log_msg) <= 0) {
-      break;
+  auto check_function = [&](log_msg log_msg, bool* found) {
+    if ((size_t)log_msg.entry.len < LOGGER_ENTRY_MAX_PAYLOAD) {
+      return;
     }
 
-    ASSERT_EQ(log_msg.entry.pid, pid);
-
-    if ((log_msg.entry.sec < (ts.tv_sec - 1)) ||
-        ((ts.tv_sec + 1) < log_msg.entry.sec) ||
-        ((size_t)log_msg.entry.len < LOGGER_ENTRY_MAX_PAYLOAD) ||
-        (log_msg.id() != LOG_ID_MAIN)) {
-      continue;
-    }
-
-    ++count;
+    *found = true;
 
     AndroidLogFormat* logformat = android_log_format_new();
     EXPECT_TRUE(NULL != logformat);
     AndroidLogEntry entry;
-    int processLogBuffer =
-        android_log_processLogBuffer(&log_msg.entry_v1, &entry);
+    int processLogBuffer = android_log_processLogBuffer(&log_msg.entry, &entry);
     EXPECT_EQ(0, processLogBuffer);
     if (processLogBuffer == 0) {
       fflush(stderr);
@@ -1188,19 +1024,20 @@
       EXPECT_GT(LOGGER_ENTRY_MAX_PAYLOAD * 13 / 8, printLogLine);
     }
     android_log_format_free(logformat);
-  }
+  };
 
-  EXPECT_EQ(SUPPORTS_END_TO_END, count);
+  RunLogTests(LOG_ID_MAIN, write_function, check_function);
 
-  android_logger_list_close(logger_list);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
 
+// TODO: This test is tautological. android_logger_list_read() calls recv() with
+// LOGGER_ENTRY_MAX_PAYLOAD as its size argument, so it's not possible for this test to read a
+// payload larger than that size.
 TEST(liblog, too_big_payload) {
-#ifdef TEST_PREFIX
-  TEST_PREFIX
+#ifdef __ANDROID__
   pid_t pid = getpid();
   static const char big_payload_tag[] = "TEST_big_payload_XXXX";
   char tag[sizeof(big_payload_tag)];
@@ -1208,32 +1045,18 @@
   snprintf(tag + sizeof(tag) - 5, 5, "%04X", pid & 0xFFFF);
 
   std::string longString(3266519, 'x');
+  ssize_t ret;
 
-  ssize_t ret = LOG_FAILURE_RETRY(__android_log_buf_write(
-      LOG_ID_SYSTEM, ANDROID_LOG_INFO, tag, longString.c_str()));
+  auto write_function = [&] {
+    ret = LOG_FAILURE_RETRY(
+        __android_log_buf_write(LOG_ID_SYSTEM, ANDROID_LOG_INFO, tag, longString.c_str()));
+  };
 
-  struct logger_list* logger_list;
-
-  ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
-                           LOG_ID_SYSTEM,
-                           ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 100, 0)));
-
-  ssize_t max_len = 0;
-
-  for (;;) {
-    log_msg log_msg;
-    if (android_logger_list_read(logger_list, &log_msg) <= 0) {
-      break;
-    }
-
-    if ((log_msg.entry.pid != pid) || (log_msg.id() != LOG_ID_SYSTEM)) {
-      continue;
-    }
-
+  auto check_function = [&](log_msg log_msg, bool* found) {
     char* data = log_msg.msg();
 
     if (!data || strcmp(++data, tag)) {
-      continue;
+      return;
     }
 
     data += strlen(data) + 1;
@@ -1245,37 +1068,38 @@
       ++right;
     }
 
-    if (max_len <= (left - data)) {
-      max_len = left - data + 1;
+    ssize_t len = left - data + 1;
+    // Check that we don't see any entries larger than the max payload.
+    EXPECT_LE(static_cast<size_t>(len), LOGGER_ENTRY_MAX_PAYLOAD - sizeof(big_payload_tag));
+
+    // Once we've found our expected entry, break.
+    if (len == LOGGER_ENTRY_MAX_PAYLOAD - sizeof(big_payload_tag)) {
+      EXPECT_EQ(ret, len + static_cast<ssize_t>(sizeof(big_payload_tag)));
+      *found = true;
     }
-  }
+  };
 
-  android_logger_list_close(logger_list);
+  RunLogTests(LOG_ID_SYSTEM, write_function, check_function);
 
-#if !SUPPORTS_END_TO_END
-  max_len =
-      max_len ? max_len : LOGGER_ENTRY_MAX_PAYLOAD - sizeof(big_payload_tag);
-#endif
-  EXPECT_LE(LOGGER_ENTRY_MAX_PAYLOAD - sizeof(big_payload_tag),
-            static_cast<size_t>(max_len));
-
-  // SLOP: Allow the underlying interface to optionally place a
-  // terminating nul at the LOGGER_ENTRY_MAX_PAYLOAD's last byte
-  // or not.
-  if (ret == (max_len + static_cast<ssize_t>(sizeof(big_payload_tag)) - 1)) {
-    --max_len;
-  }
-  EXPECT_EQ(ret, max_len + static_cast<ssize_t>(sizeof(big_payload_tag)));
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
 
 TEST(liblog, dual_reader) {
-#ifdef TEST_PREFIX
-  TEST_PREFIX
+#ifdef __ANDROID__
+  static const int expected_count1 = 25;
+  static const int expected_count2 = 25;
 
-  static const int num = 25;
+  pid_t pid = getpid();
+
+  auto logger_list1 = std::unique_ptr<struct logger_list, ListCloser>{
+      android_logger_list_open(LOG_ID_MAIN, ANDROID_LOG_RDONLY, expected_count1, pid)};
+  ASSERT_TRUE(logger_list1);
+
+  auto logger_list2 = std::unique_ptr<struct logger_list, ListCloser>{
+      android_logger_list_open(LOG_ID_MAIN, ANDROID_LOG_RDONLY, expected_count2, pid)};
+  ASSERT_TRUE(logger_list2);
 
   for (int i = 25; i > 0; --i) {
     static const char fmt[] = "dual_reader %02d";
@@ -1284,32 +1108,46 @@
     LOG_FAILURE_RETRY(__android_log_buf_write(LOG_ID_MAIN, ANDROID_LOG_INFO,
                                               "liblog", buffer));
   }
-  usleep(1000000);
 
-  struct logger_list* logger_list1;
-  ASSERT_TRUE(NULL != (logger_list1 = android_logger_list_open(
-                           LOG_ID_MAIN,
-                           ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, num, 0)));
+  alarm(2);
+  auto alarm_guard = android::base::make_scope_guard([] { alarm(0); });
 
-  struct logger_list* logger_list2;
+  // Wait until we see all messages with the blocking reader.
+  int count1 = 0;
+  int count2 = 0;
 
-  if (NULL == (logger_list2 = android_logger_list_open(
-                   LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK,
-                   num - 10, 0))) {
-    android_logger_list_close(logger_list1);
-    ASSERT_TRUE(NULL != logger_list2);
+  while (count1 != expected_count2 || count2 != expected_count2) {
+    log_msg log_msg;
+    if (count1 < expected_count1) {
+      ASSERT_GT(android_logger_list_read(logger_list1.get(), &log_msg), 0);
+      count1++;
+    }
+    if (count2 < expected_count2) {
+      ASSERT_GT(android_logger_list_read(logger_list2.get(), &log_msg), 0);
+      count2++;
+    }
   }
 
-  int count1 = 0;
+  // Test again with the nonblocking reader.
+  auto logger_list_non_block1 =
+      std::unique_ptr<struct logger_list, ListCloser>{android_logger_list_open(
+          LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, expected_count1, pid)};
+  ASSERT_TRUE(logger_list_non_block1);
+
+  auto logger_list_non_block2 =
+      std::unique_ptr<struct logger_list, ListCloser>{android_logger_list_open(
+          LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, expected_count2, pid)};
+  ASSERT_TRUE(logger_list_non_block2);
+  count1 = 0;
+  count2 = 0;
   bool done1 = false;
-  int count2 = 0;
   bool done2 = false;
 
-  do {
+  while (!done1 || !done2) {
     log_msg log_msg;
 
     if (!done1) {
-      if (android_logger_list_read(logger_list1, &log_msg) <= 0) {
+      if (android_logger_list_read(logger_list_non_block1.get(), &log_msg) <= 0) {
         done1 = true;
       } else {
         ++count1;
@@ -1317,25 +1155,21 @@
     }
 
     if (!done2) {
-      if (android_logger_list_read(logger_list2, &log_msg) <= 0) {
+      if (android_logger_list_read(logger_list_non_block2.get(), &log_msg) <= 0) {
         done2 = true;
       } else {
         ++count2;
       }
     }
-  } while ((!done1) || (!done2));
+  }
 
-  android_logger_list_close(logger_list1);
-  android_logger_list_close(logger_list2);
-
-  EXPECT_EQ(num * SUPPORTS_END_TO_END, count1);
-  EXPECT_EQ((num - 10) * SUPPORTS_END_TO_END, count2);
+  EXPECT_EQ(expected_count1, count1);
+  EXPECT_EQ(expected_count2, count2);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
 
-#ifdef USING_LOGGER_DEFAULT  // Do not retest logprint
 static bool checkPriForTag(AndroidLogFormat* p_format, const char* tag,
                            android_LogPriority pri) {
   return android_log_shouldPrintLine(p_format, tag, pri) &&
@@ -1411,9 +1245,8 @@
 
   android_log_format_free(p_format);
 }
-#endif  // USING_LOGGER_DEFAULT
 
-#ifdef USING_LOGGER_DEFAULT  // Do not retest property handling
+#ifdef ENABLE_FLAKY_TESTS
 TEST(liblog, is_loggable) {
 #ifdef __ANDROID__
   static const char tag[] = "is_loggable";
@@ -1701,14 +1534,13 @@
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
-#endif  // USING_LOGGER_DEFAULT
+#endif  // ENABLE_FLAKY_TESTS
 
+#ifdef ENABLE_FLAKY_TESTS
 // Following tests the specific issues surrounding error handling wrt logd.
 // Kills logd and toss all collected data, equivalent to logcat -b all -c,
 // except we also return errors to the logging callers.
-#ifdef USING_LOGGER_DEFAULT
 #ifdef __ANDROID__
-#ifdef TEST_PREFIX
 // helper to liblog.enoent to count end-to-end matching logging messages.
 static int count_matching_ts(log_time ts) {
   usleep(1000000);
@@ -1744,21 +1576,18 @@
   return count;
 }
 
-// meant to be handed to ASSERT_TRUE / EXPECT_TRUE only to expand the message
-static testing::AssertionResult IsOk(bool ok, std::string& message) {
-  return ok ? testing::AssertionSuccess()
-            : (testing::AssertionFailure() << message);
-}
-#endif  // TEST_PREFIX
-
 TEST(liblog, enoent) {
-#ifdef TEST_PREFIX
-  TEST_PREFIX
+#ifdef __ANDROID__
+  if (getuid() != 0) {
+    GTEST_SKIP() << "Skipping test, must be run as root.";
+    return;
+  }
+
   log_time ts(CLOCK_MONOTONIC);
   EXPECT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
-  EXPECT_EQ(SUPPORTS_END_TO_END, count_matching_ts(ts));
+  EXPECT_EQ(1, count_matching_ts(ts));
 
-  // This call will fail if we are setuid(AID_SYSTEM), beware of any
+  // This call will fail unless we are root, beware of any
   // test prior to this one playing with setuid and causing interference.
   // We need to run before these tests so that they do not interfere with
   // this test.
@@ -1770,20 +1599,7 @@
   // liblog.android_logger_get_ is one of those tests that has no recourse
   // and that would be adversely affected by emptying the log if it was run
   // right after this test.
-  if (getuid() != AID_ROOT) {
-    fprintf(
-        stderr,
-        "WARNING: test conditions request being run as root and not AID=%d\n",
-        getuid());
-    if (!__android_log_is_debuggable()) {
-      fprintf(
-          stderr,
-          "WARNING: can not run test on a \"user\" build, bypassing test\n");
-      return;
-    }
-  }
-
-  system((getuid() == AID_ROOT) ? "stop logd" : "su 0 stop logd");
+  system("stop logd");
   usleep(1000000);
 
   // A clean stop like we are testing returns -ENOENT, but in the _real_
@@ -1795,38 +1611,34 @@
   std::string content = android::base::StringPrintf(
       "__android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)) = %d %s\n",
       ret, (ret <= 0) ? strerror(-ret) : "(content sent)");
-  EXPECT_TRUE(
-      IsOk((ret == -ENOENT) || (ret == -ENOTCONN) || (ret == -ECONNREFUSED),
-           content));
+  EXPECT_TRUE(ret == -ENOENT || ret == -ENOTCONN || ret == -ECONNREFUSED) << content;
   ret = __android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts));
   content = android::base::StringPrintf(
       "__android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)) = %d %s\n",
       ret, (ret <= 0) ? strerror(-ret) : "(content sent)");
-  EXPECT_TRUE(
-      IsOk((ret == -ENOENT) || (ret == -ENOTCONN) || (ret == -ECONNREFUSED),
-           content));
+  EXPECT_TRUE(ret == -ENOENT || ret == -ENOTCONN || ret == -ECONNREFUSED) << content;
   EXPECT_EQ(0, count_matching_ts(ts));
 
-  system((getuid() == AID_ROOT) ? "start logd" : "su 0 start logd");
+  system("start logd");
   usleep(1000000);
 
   EXPECT_EQ(0, count_matching_ts(ts));
 
   ts = log_time(CLOCK_MONOTONIC);
   EXPECT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
-  EXPECT_EQ(SUPPORTS_END_TO_END, count_matching_ts(ts));
+  EXPECT_EQ(1, count_matching_ts(ts));
 
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
 #endif  // __ANDROID__
-#endif  // USING_LOGGER_DEFAULT
+#endif  // ENABLE_FLAKY_TESTS
 
 // Below this point we run risks of setuid(AID_SYSTEM) which may affect others.
 
+#ifdef ENABLE_FLAKY_TESTS
 // Do not retest properties, and cannot log into LOG_ID_SECURITY
-#ifdef USING_LOGGER_DEFAULT
 TEST(liblog, __security) {
 #ifdef __ANDROID__
   static const char persist_key[] = "persist.logd.security";
@@ -2083,113 +1895,74 @@
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
-#endif  // USING_LOGGER_DEFAULT
+#endif  // ENABLE_FLAKY_TESTS
 
-#ifdef TEST_PREFIX
-static void android_errorWriteWithInfoLog_helper(int TAG, const char* SUBTAG,
-                                                 int UID, const char* payload,
-                                                 int DATA_LEN, int& count) {
-  TEST_PREFIX
-  struct logger_list* logger_list;
+#ifdef __ANDROID__
+static void android_errorWriteWithInfoLog_helper(int tag, const char* subtag, int uid,
+                                                 const char* payload, int data_len) {
+  auto write_function = [&] {
+    int ret = android_errorWriteWithInfoLog(tag, subtag, uid, payload, data_len);
+    ASSERT_LT(0, ret);
+  };
 
-  pid_t pid = getpid();
-
-  count = 0;
-
-  ASSERT_TRUE(NULL !=
-              (logger_list = android_logger_list_open(
-                   LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK,
-                   1000, pid)));
-
-  int retval_android_errorWriteWithinInfoLog =
-      android_errorWriteWithInfoLog(TAG, SUBTAG, UID, payload, DATA_LEN);
-  if (payload) {
-    ASSERT_LT(0, retval_android_errorWriteWithinInfoLog);
-  } else {
-    ASSERT_GT(0, retval_android_errorWriteWithinInfoLog);
-  }
-
-  sleep(2);
-
-  for (;;) {
-    log_msg log_msg;
-    if (android_logger_list_read(logger_list, &log_msg) <= 0) {
-      break;
-    }
-
-    char* eventData = log_msg.msg();
-    if (!eventData) {
-      continue;
-    }
-
-    char* original = eventData;
+  auto check_function = [&](log_msg log_msg, bool* found) {
+    char* event_data = log_msg.msg();
+    char* original = event_data;
 
     // Tag
-    int tag = get4LE(eventData);
-    eventData += 4;
-
-    if (tag != TAG) {
-      continue;
-    }
-
-    if (!payload) {
-      // This tag should not have been written because the data was null
-      ++count;
-      break;
+    auto* event_header = reinterpret_cast<android_event_header_t*>(event_data);
+    event_data += sizeof(android_event_header_t);
+    if (event_header->tag != tag) {
+      return;
     }
 
     // List type
-    ASSERT_EQ(EVENT_TYPE_LIST, eventData[0]);
-    eventData++;
-
-    // Number of elements in list
-    ASSERT_EQ(3, eventData[0]);
-    eventData++;
+    auto* event_list = reinterpret_cast<android_event_list_t*>(event_data);
+    ASSERT_EQ(EVENT_TYPE_LIST, event_list->type);
+    ASSERT_EQ(3, event_list->element_count);
+    event_data += sizeof(android_event_list_t);
 
     // Element #1: string type for subtag
-    ASSERT_EQ(EVENT_TYPE_STRING, eventData[0]);
-    eventData++;
-
-    unsigned subtag_len = strlen(SUBTAG);
-    if (subtag_len > 32) subtag_len = 32;
-    ASSERT_EQ(subtag_len, get4LE(eventData));
-    eventData += 4;
-
-    if (memcmp(SUBTAG, eventData, subtag_len)) {
-      continue;
+    auto* event_string_subtag = reinterpret_cast<android_event_string_t*>(event_data);
+    ASSERT_EQ(EVENT_TYPE_STRING, event_string_subtag->type);
+    int32_t subtag_len = strlen(subtag);
+    if (subtag_len > 32) {
+      subtag_len = 32;
     }
-    eventData += subtag_len;
+    ASSERT_EQ(subtag_len, event_string_subtag->length);
+    if (memcmp(subtag, &event_string_subtag->data, subtag_len)) {
+      return;
+    }
+    event_data += sizeof(android_event_string_t) + subtag_len;
 
     // Element #2: int type for uid
-    ASSERT_EQ(EVENT_TYPE_INT, eventData[0]);
-    eventData++;
-
-    ASSERT_EQ(UID, (int)get4LE(eventData));
-    eventData += 4;
+    auto* event_int_uid = reinterpret_cast<android_event_int_t*>(event_data);
+    ASSERT_EQ(EVENT_TYPE_INT, event_int_uid->type);
+    ASSERT_EQ(uid, event_int_uid->data);
+    event_data += sizeof(android_event_int_t);
 
     // Element #3: string type for data
-    ASSERT_EQ(EVENT_TYPE_STRING, eventData[0]);
-    eventData++;
-
-    size_t dataLen = get4LE(eventData);
-    eventData += 4;
-    if (DATA_LEN < 512) ASSERT_EQ(DATA_LEN, (int)dataLen);
-
-    if (memcmp(payload, eventData, dataLen)) {
-      continue;
+    auto* event_string_data = reinterpret_cast<android_event_string_t*>(event_data);
+    ASSERT_EQ(EVENT_TYPE_STRING, event_string_data->type);
+    int32_t message_data_len = event_string_data->length;
+    if (data_len < 512) {
+      ASSERT_EQ(data_len, message_data_len);
     }
+    if (memcmp(payload, &event_string_data->data, message_data_len) != 0) {
+      return;
+    }
+    event_data += sizeof(android_event_string_t);
 
-    if (DATA_LEN >= 512) {
-      eventData += dataLen;
+    if (data_len >= 512) {
+      event_data += message_data_len;
       // 4 bytes for the tag, and max_payload_buf should be truncated.
-      ASSERT_LE(4 + 512, eventData - original);       // worst expectations
-      ASSERT_GT(4 + DATA_LEN, eventData - original);  // must be truncated
+      ASSERT_LE(4 + 512, event_data - original);       // worst expectations
+      ASSERT_GT(4 + data_len, event_data - original);  // must be truncated
     }
+    *found = true;
+  };
 
-    ++count;
-  }
-
-  android_logger_list_close(logger_list);
+  RunLogTests(LOG_ID_EVENTS, write_function, check_function);
 }
 #endif
 
@@ -2203,11 +1976,8 @@
 #endif
 
 TEST(liblog, android_errorWriteWithInfoLog__android_logger_list_read__typical) {
-#ifdef TEST_PREFIX
-  int count;
-  android_errorWriteWithInfoLog_helper(UNIQUE_TAG(1), "test-subtag", -1,
-                                       max_payload_buf, 200, count);
-  EXPECT_EQ(SUPPORTS_END_TO_END, count);
+#ifdef __ANDROID__
+  android_errorWriteWithInfoLog_helper(UNIQUE_TAG(1), "test-subtag", -1, max_payload_buf, 200);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
@@ -2215,24 +1985,21 @@
 
 TEST(liblog,
      android_errorWriteWithInfoLog__android_logger_list_read__data_too_large) {
-#ifdef TEST_PREFIX
-  int count;
-  android_errorWriteWithInfoLog_helper(UNIQUE_TAG(2), "test-subtag", -1,
-                                       max_payload_buf, sizeof(max_payload_buf),
-                                       count);
-  EXPECT_EQ(SUPPORTS_END_TO_END, count);
+#ifdef __ANDROID__
+  android_errorWriteWithInfoLog_helper(UNIQUE_TAG(2), "test-subtag", -1, max_payload_buf,
+                                       sizeof(max_payload_buf));
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
 
+// TODO: Do we need to check that we didn't actually write anything if we return a failure here?
 TEST(liblog,
      android_errorWriteWithInfoLog__android_logger_list_read__null_data) {
-#ifdef TEST_PREFIX
-  int count;
-  android_errorWriteWithInfoLog_helper(UNIQUE_TAG(3), "test-subtag", -1, NULL,
-                                       200, count);
-  EXPECT_EQ(0, count);
+#ifdef __ANDROID__
+  int retval_android_errorWriteWithinInfoLog =
+      android_errorWriteWithInfoLog(UNIQUE_TAG(3), "test-subtag", -1, nullptr, 200);
+  ASSERT_GT(0, retval_android_errorWriteWithinInfoLog);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
@@ -2240,12 +2007,9 @@
 
 TEST(liblog,
      android_errorWriteWithInfoLog__android_logger_list_read__subtag_too_long) {
-#ifdef TEST_PREFIX
-  int count;
+#ifdef __ANDROID__
   android_errorWriteWithInfoLog_helper(
-      UNIQUE_TAG(4), "abcdefghijklmnopqrstuvwxyz now i know my abc", -1,
-      max_payload_buf, 200, count);
-  EXPECT_EQ(SUPPORTS_END_TO_END, count);
+      UNIQUE_TAG(4), "abcdefghijklmnopqrstuvwxyz now i know my abc", -1, max_payload_buf, 200);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
@@ -2259,144 +2023,59 @@
   buf_write_test(max_payload_buf);
 }
 
-#ifdef TEST_PREFIX
-static void android_errorWriteLog_helper(int TAG, const char* SUBTAG,
-                                         int& count) {
-  TEST_PREFIX
-  struct logger_list* logger_list;
-
-  pid_t pid = getpid();
-
-  count = 0;
-
-  // Do a Before and After on the count to measure the effect. Decrement
-  // what we find in Before to set the stage.
-  ASSERT_TRUE(NULL !=
-              (logger_list = android_logger_list_open(
-                   LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK,
-                   1000, pid)));
-
-  for (;;) {
-    log_msg log_msg;
-    if (android_logger_list_read(logger_list, &log_msg) <= 0) break;
-
-    char* eventData = log_msg.msg();
-    if (!eventData) continue;
-
-    // Tag
-    int tag = get4LE(eventData);
-    eventData += 4;
-
-    if (tag != TAG) continue;
-
-    if (!SUBTAG) {
-      // This tag should not have been written because the data was null
-      --count;
-      break;
-    }
-
-    // List type
-    eventData++;
-    // Number of elements in list
-    eventData++;
-    // Element #1: string type for subtag
-    eventData++;
-
-    eventData += 4;
-
-    if (memcmp(SUBTAG, eventData, strlen(SUBTAG))) continue;
-    --count;
-  }
-
-  android_logger_list_close(logger_list);
-
-  // Do an After on the count to measure the effect.
-  ASSERT_TRUE(NULL !=
-              (logger_list = android_logger_list_open(
-                   LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK,
-                   1000, pid)));
-
-  int retval_android_errorWriteLog = android_errorWriteLog(TAG, SUBTAG);
-  if (SUBTAG) {
-    ASSERT_LT(0, retval_android_errorWriteLog);
-  } else {
-    ASSERT_GT(0, retval_android_errorWriteLog);
-  }
-
-  sleep(2);
-
-  for (;;) {
-    log_msg log_msg;
-    if (android_logger_list_read(logger_list, &log_msg) <= 0) {
-      break;
-    }
-
-    char* eventData = log_msg.msg();
-    if (!eventData) {
-      continue;
-    }
-
-    // Tag
-    int tag = get4LE(eventData);
-    eventData += 4;
-
-    if (tag != TAG) {
-      continue;
-    }
-
-    if (!SUBTAG) {
-      // This tag should not have been written because the data was null
-      ++count;
-      break;
-    }
-
-    // List type
-    ASSERT_EQ(EVENT_TYPE_LIST, eventData[0]);
-    eventData++;
-
-    // Number of elements in list
-    ASSERT_EQ(3, eventData[0]);
-    eventData++;
-
-    // Element #1: string type for subtag
-    ASSERT_EQ(EVENT_TYPE_STRING, eventData[0]);
-    eventData++;
-
-    ASSERT_EQ(strlen(SUBTAG), get4LE(eventData));
-    eventData += 4;
-
-    if (memcmp(SUBTAG, eventData, strlen(SUBTAG))) {
-      continue;
-    }
-    ++count;
-  }
-
-  android_logger_list_close(logger_list);
-}
-#endif
-
 TEST(liblog, android_errorWriteLog__android_logger_list_read__success) {
-#ifdef TEST_PREFIX
-  int count;
-  android_errorWriteLog_helper(UNIQUE_TAG(5), "test-subtag", count);
-  EXPECT_EQ(SUPPORTS_END_TO_END, count);
+#ifdef __ANDROID__
+  int kTag = UNIQUE_TAG(5);
+  const char* kSubTag = "test-subtag";
+
+  auto write_function = [&] {
+    int retval_android_errorWriteLog = android_errorWriteLog(kTag, kSubTag);
+    ASSERT_LT(0, retval_android_errorWriteLog);
+  };
+
+  auto check_function = [&](log_msg log_msg, bool* found) {
+    char* event_data = log_msg.msg();
+
+    // Tag
+    auto* event_header = reinterpret_cast<android_event_header_t*>(event_data);
+    event_data += sizeof(android_event_header_t);
+    if (event_header->tag != kTag) {
+      return;
+    }
+
+    // List type
+    auto* event_list = reinterpret_cast<android_event_list_t*>(event_data);
+    ASSERT_EQ(EVENT_TYPE_LIST, event_list->type);
+    ASSERT_EQ(3, event_list->element_count);
+    event_data += sizeof(android_event_list_t);
+
+    // Element #1: string type for subtag
+    auto* event_string_subtag = reinterpret_cast<android_event_string_t*>(event_data);
+    ASSERT_EQ(EVENT_TYPE_STRING, event_string_subtag->type);
+    int32_t subtag_len = strlen(kSubTag);
+    ASSERT_EQ(subtag_len, event_string_subtag->length);
+    if (memcmp(kSubTag, &event_string_subtag->data, subtag_len) == 0) {
+      *found = true;
+    }
+  };
+
+  RunLogTests(LOG_ID_EVENTS, write_function, check_function);
+
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
 
 TEST(liblog, android_errorWriteLog__android_logger_list_read__null_subtag) {
-#ifdef TEST_PREFIX
-  int count;
-  android_errorWriteLog_helper(UNIQUE_TAG(6), NULL, count);
-  EXPECT_EQ(0, count);
+#ifdef __ANDROID__
+  EXPECT_LT(android_errorWriteLog(UNIQUE_TAG(6), nullptr), 0);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
 
 // Do not retest logger list handling
-#ifdef TEST_PREFIX
+#ifdef __ANDROID__
 static int is_real_element(int type) {
   return ((type == EVENT_TYPE_INT) || (type == EVENT_TYPE_LONG) ||
           (type == EVENT_TYPE_STRING) || (type == EVENT_TYPE_FLOAT));
@@ -2551,9 +2230,9 @@
 
   return 0;
 }
-#endif  // TEST_PREFIX
+#endif  // __ANDROID__
 
-#ifdef TEST_PREFIX
+#ifdef __ANDROID__
 static const char* event_test_int32(uint32_t tag, size_t& expected_len) {
   android_log_context ctx;
 
@@ -2807,59 +2486,27 @@
 
 static void create_android_logger(const char* (*fn)(uint32_t tag,
                                                     size_t& expected_len)) {
-  TEST_PREFIX
-  struct logger_list* logger_list;
+  size_t expected_len;
+  const char* expected_string;
+  auto write_function = [&] {
+    expected_string = (*fn)(1005, expected_len);
+    ASSERT_NE(nullptr, expected_string);
+  };
 
   pid_t pid = getpid();
-
-  ASSERT_TRUE(NULL !=
-              (logger_list = android_logger_list_open(
-                   LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK,
-                   1000, pid)));
-
-#ifdef __ANDROID__
-  log_time ts(android_log_clockid());
-#else
-  log_time ts(CLOCK_REALTIME);
-#endif
-
-  size_t expected_len;
-  const char* expected_string = (*fn)(1005, expected_len);
-
-  if (!expected_string) {
-    android_logger_list_close(logger_list);
-    return;
-  }
-
-  usleep(1000000);
-
-  int count = 0;
-
-  for (;;) {
-    log_msg log_msg;
-    if (android_logger_list_read(logger_list, &log_msg) <= 0) {
-      break;
-    }
-
-    ASSERT_EQ(log_msg.entry.pid, pid);
-
-    if ((log_msg.entry.sec < (ts.tv_sec - 1)) ||
-        ((ts.tv_sec + 1) < log_msg.entry.sec) ||
-        ((size_t)log_msg.entry.len != expected_len) ||
-        (log_msg.id() != LOG_ID_EVENTS)) {
-      continue;
+  auto check_function = [&](log_msg log_msg, bool* found) {
+    if (static_cast<size_t>(log_msg.entry.len) != expected_len) {
+      return;
     }
 
     char* eventData = log_msg.msg();
 
-    ++count;
-
     AndroidLogFormat* logformat = android_log_format_new();
     EXPECT_TRUE(NULL != logformat);
     AndroidLogEntry entry;
     char msgBuf[1024];
-    int processBinaryLogBuffer = android_log_processBinaryLogBuffer(
-        &log_msg.entry_v1, &entry, NULL, msgBuf, sizeof(msgBuf));
+    int processBinaryLogBuffer =
+        android_log_processBinaryLogBuffer(&log_msg.entry, &entry, nullptr, msgBuf, sizeof(msgBuf));
     EXPECT_EQ(0, processBinaryLogBuffer);
     if (processBinaryLogBuffer == 0) {
       int line_overhead = 20;
@@ -2876,29 +2523,28 @@
     // test buffer reading API
     int buffer_to_string = -1;
     if (eventData) {
-      snprintf(msgBuf, sizeof(msgBuf), "I/[%" PRIu32 "]", get4LE(eventData));
+      auto* event_header = reinterpret_cast<android_event_header_t*>(eventData);
+      eventData += sizeof(android_event_header_t);
+      snprintf(msgBuf, sizeof(msgBuf), "I/[%" PRId32 "]", event_header->tag);
       print_barrier();
       fprintf(stderr, "%-10s(%5u): ", msgBuf, pid);
       memset(msgBuf, 0, sizeof(msgBuf));
-      buffer_to_string = android_log_buffer_to_string(
-          eventData + sizeof(uint32_t), log_msg.entry.len - sizeof(uint32_t),
-          msgBuf, sizeof(msgBuf));
+      buffer_to_string =
+          android_log_buffer_to_string(eventData, log_msg.entry.len, msgBuf, sizeof(msgBuf));
       fprintf(stderr, "%s\n", msgBuf);
       print_barrier();
     }
     EXPECT_EQ(0, buffer_to_string);
-    EXPECT_EQ(strlen(expected_string), strlen(msgBuf));
-    EXPECT_EQ(0, strcmp(expected_string, msgBuf));
-  }
+    EXPECT_STREQ(expected_string, msgBuf);
+    *found = true;
+  };
 
-  EXPECT_EQ(SUPPORTS_END_TO_END, count);
-
-  android_logger_list_close(logger_list);
+  RunLogTests(LOG_ID_EVENTS, write_function, check_function);
 }
 #endif
 
 TEST(liblog, create_android_logger_int32) {
-#ifdef TEST_PREFIX
+#ifdef __ANDROID__
   create_android_logger(event_test_int32);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2906,7 +2552,7 @@
 }
 
 TEST(liblog, create_android_logger_int64) {
-#ifdef TEST_PREFIX
+#ifdef __ANDROID__
   create_android_logger(event_test_int64);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2914,7 +2560,7 @@
 }
 
 TEST(liblog, create_android_logger_list_int64) {
-#ifdef TEST_PREFIX
+#ifdef __ANDROID__
   create_android_logger(event_test_list_int64);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2922,7 +2568,7 @@
 }
 
 TEST(liblog, create_android_logger_simple_automagic_list) {
-#ifdef TEST_PREFIX
+#ifdef __ANDROID__
   create_android_logger(event_test_simple_automagic_list);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2930,7 +2576,7 @@
 }
 
 TEST(liblog, create_android_logger_list_empty) {
-#ifdef TEST_PREFIX
+#ifdef __ANDROID__
   create_android_logger(event_test_list_empty);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2938,7 +2584,7 @@
 }
 
 TEST(liblog, create_android_logger_complex_nested_list) {
-#ifdef TEST_PREFIX
+#ifdef __ANDROID__
   create_android_logger(event_test_complex_nested_list);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2946,7 +2592,7 @@
 }
 
 TEST(liblog, create_android_logger_7_level_prefix) {
-#ifdef TEST_PREFIX
+#ifdef __ANDROID__
   create_android_logger(event_test_7_level_prefix);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2954,7 +2600,7 @@
 }
 
 TEST(liblog, create_android_logger_7_level_suffix) {
-#ifdef TEST_PREFIX
+#ifdef __ANDROID__
   create_android_logger(event_test_7_level_suffix);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2962,7 +2608,7 @@
 }
 
 TEST(liblog, create_android_logger_android_log_error_write) {
-#ifdef TEST_PREFIX
+#ifdef __ANDROID__
   create_android_logger(event_test_android_log_error_write);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2970,14 +2616,13 @@
 }
 
 TEST(liblog, create_android_logger_android_log_error_write_null) {
-#ifdef TEST_PREFIX
+#ifdef __ANDROID__
   create_android_logger(event_test_android_log_error_write_null);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
 
-#ifdef USING_LOGGER_DEFAULT  // Do not retest logger list handling
 TEST(liblog, create_android_logger_overflow) {
   android_log_context ctx;
 
@@ -3005,23 +2650,7 @@
   ASSERT_TRUE(NULL == ctx);
 }
 
-TEST(liblog, android_log_write_list_buffer) {
-  __android_log_event_list ctx(1005);
-  ctx << 1005 << "tag_def"
-      << "(tag|1),(name|3),(format|3)";
-  std::string buffer(ctx);
-  ctx.close();
-
-  char msgBuf[1024];
-  memset(msgBuf, 0, sizeof(msgBuf));
-  EXPECT_EQ(android_log_buffer_to_string(buffer.data(), buffer.length(), msgBuf,
-                                         sizeof(msgBuf)),
-            0);
-  EXPECT_STREQ(msgBuf, "[1005,tag_def,(tag|1),(name|3),(format|3)]");
-}
-#endif  // USING_LOGGER_DEFAULT
-
-#ifdef USING_LOGGER_DEFAULT  // Do not retest pmsg functionality
+#ifdef ENABLE_FLAKY_TESTS
 #ifdef __ANDROID__
 #ifndef NO_PSTORE
 static const char __pmsg_file[] =
@@ -3099,7 +2728,7 @@
   EXPECT_EQ(ANDROID_LOG_VERBOSE, prio);
   EXPECT_FALSE(NULL == strstr(__pmsg_file, filename));
   EXPECT_EQ(len, sizeof(max_payload_buf));
-  EXPECT_EQ(0, strcmp(max_payload_buf, buf));
+  EXPECT_STREQ(max_payload_buf, buf);
 
   ++signaled;
   if ((len != sizeof(max_payload_buf)) || strcmp(max_payload_buf, buf)) {
@@ -3158,9 +2787,8 @@
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
-#endif  // USING_LOGGER_DEFAULT
+#endif  // ENABLE_FLAKY_TESTS
 
-#ifdef USING_LOGGER_DEFAULT  // Do not retest event mapping functionality
 TEST(liblog, android_lookupEventTagNum) {
 #ifdef __ANDROID__
   EventTagMap* map = android_openEventTagMap(NULL);
@@ -3177,4 +2805,3 @@
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
-#endif  // USING_LOGGER_DEFAULT
diff --git a/liblog/tests/liblog_test_default.cpp b/liblog/tests/liblog_test_default.cpp
deleted file mode 100644
index 9fc443c..0000000
--- a/liblog/tests/liblog_test_default.cpp
+++ /dev/null
@@ -1,5 +0,0 @@
-#ifdef __ANDROID__
-#include <log/log_transport.h>
-#define TEST_LOGGER LOGGER_DEFAULT
-#endif
-#include "liblog_test.cpp"
diff --git a/liblog/tests/liblog_test_stderr.cpp b/liblog/tests/liblog_test_stderr.cpp
deleted file mode 100644
index abc1b9c..0000000
--- a/liblog/tests/liblog_test_stderr.cpp
+++ /dev/null
@@ -1,5 +0,0 @@
-#include <log/log_transport.h>
-#define liblog liblog_stderr
-#define TEST_LOGGER LOGGER_STDERR
-#define USING_LOGGER_STDERR
-#include "liblog_test.cpp"
diff --git a/liblog/tests/log_read_test.cpp b/liblog/tests/log_read_test.cpp
index 443c3ea..1be99aa 100644
--- a/liblog/tests/log_read_test.cpp
+++ b/liblog/tests/log_read_test.cpp
@@ -29,54 +29,6 @@
 // Do not use anything in log/log_time.h despite side effects of the above.
 #include <private/android_logger.h>
 
-TEST(liblog, __android_log_write__android_logger_list_read) {
-#ifdef __ANDROID__
-  pid_t pid = getpid();
-
-  struct logger_list* logger_list;
-  ASSERT_TRUE(
-      NULL !=
-      (logger_list = android_logger_list_open(
-           LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
-
-  struct timespec ts;
-  clock_gettime(CLOCK_MONOTONIC, &ts);
-  std::string buf = android::base::StringPrintf("pid=%u ts=%ld.%09ld", pid,
-                                                ts.tv_sec, ts.tv_nsec);
-  static const char tag[] =
-      "liblog.__android_log_write__android_logger_list_read";
-  static const char prio = ANDROID_LOG_DEBUG;
-  ASSERT_LT(0, __android_log_write(prio, tag, buf.c_str()));
-  usleep(1000000);
-
-  buf = std::string(&prio, sizeof(prio)) + tag + std::string("", 1) + buf +
-        std::string("", 1);
-
-  int count = 0;
-
-  for (;;) {
-    log_msg log_msg;
-    if (android_logger_list_read(logger_list, &log_msg) <= 0) break;
-
-    EXPECT_EQ(log_msg.entry.pid, pid);
-    // There may be a future where we leak "liblog" tagged LOG_ID_EVENT
-    // binary messages through so that logger losses can be correlated?
-    EXPECT_EQ(log_msg.id(), LOG_ID_MAIN);
-
-    if (log_msg.entry.len != buf.length()) continue;
-
-    if (buf != std::string(log_msg.msg(), log_msg.entry.len)) continue;
-
-    ++count;
-  }
-  android_logger_list_close(logger_list);
-
-  EXPECT_EQ(1, count);
-#else
-  GTEST_LOG_(INFO) << "This test does nothing.\n";
-#endif
-}
-
 TEST(liblog, android_logger_get_) {
 #ifdef __ANDROID__
   // This test assumes the log buffers are filled with noise from
diff --git a/liblog/tests/log_wrap_test.cpp b/liblog/tests/log_wrap_test.cpp
index ebf0b15..e06964f 100644
--- a/liblog/tests/log_wrap_test.cpp
+++ b/liblog/tests/log_wrap_test.cpp
@@ -27,12 +27,9 @@
 #include <log/log_properties.h>
 #include <log/log_read.h>
 #include <log/log_time.h>
-#include <log/log_transport.h>
 
 #ifdef __ANDROID__
 static void read_with_wrap() {
-  android_set_log_transport(LOGGER_LOGD);
-
   // Read the last line in the log to get a starting timestamp. We're assuming
   // the log is not empty.
   const int mode = ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK;
@@ -61,60 +58,27 @@
 
   android_logger_list_close(logger_list);
 }
-
-static void caught_signal(int /* signum */) {
-}
 #endif
 
 // b/64143705 confirm fixed
 TEST(liblog, wrap_mode_blocks) {
 #ifdef __ANDROID__
+  // The read call is expected to take up to 2 hours in the happy case.  There was a previous bug
+  // where it would take only 30 seconds due to an alarm() in logd_reader.cpp.  That alarm has been
+  // removed, so we check here that the read call blocks for a reasonable amount of time (5s).
+
+  struct sigaction ignore = {.sa_handler = [](int) { _exit(0); }};
+  struct sigaction old_sigaction;
+  sigaction(SIGALRM, &ignore, &old_sigaction);
+  alarm(5);
 
   android::base::Timer timer;
+  read_with_wrap();
 
-  // The read call is expected to take up to 2 hours in the happy case.
-  // We only want to make sure it waits for longer than 30s, but we can't
-  // use an alarm as the implementation uses it. So we run the test in
-  // a separate process.
-  pid_t pid = fork();
-
-  if (pid == 0) {
-    // child
-    read_with_wrap();
-    _exit(0);
-  }
-
-  struct sigaction ignore, old_sigaction;
-  memset(&ignore, 0, sizeof(ignore));
-  ignore.sa_handler = caught_signal;
-  sigemptyset(&ignore.sa_mask);
-  sigaction(SIGALRM, &ignore, &old_sigaction);
-  alarm(45);
-
-  bool killed = false;
-  for (;;) {
-    siginfo_t info = {};
-    // This wait will succeed if the child exits, or fail with EINTR if the
-    // alarm goes off first - a loose approximation to a timed wait.
-    int ret = waitid(P_PID, pid, &info, WEXITED);
-    if (ret >= 0 || errno != EINTR) {
-      EXPECT_EQ(ret, 0);
-      if (!killed) {
-        EXPECT_EQ(info.si_status, 0);
-      }
-      break;
-    }
-    unsigned int alarm_left = alarm(0);
-    if (alarm_left > 0) {
-      alarm(alarm_left);
-    } else {
-      kill(pid, SIGTERM);
-      killed = true;
-    }
-  }
+  FAIL() << "read_with_wrap() should not return before the alarm is triggered.";
 
   alarm(0);
-  EXPECT_GT(timer.duration(), std::chrono::seconds(40));
+  sigaction(SIGALRM, &old_sigaction, nullptr);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
diff --git a/libmeminfo/.clang-format b/libmeminfo/.clang-format
deleted file mode 120000
index 1af4f51..0000000
--- a/libmeminfo/.clang-format
+++ /dev/null
@@ -1 +0,0 @@
-../.clang-format-4
\ No newline at end of file
diff --git a/libmeminfo/Android.bp b/libmeminfo/Android.bp
deleted file mode 100644
index 8dcc77b..0000000
--- a/libmeminfo/Android.bp
+++ /dev/null
@@ -1,85 +0,0 @@
-//
-// Copyright (C) 2018 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-cc_defaults {
-    name: "libmeminfo_defaults",
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-
-    shared_libs: [
-        "libbase",
-        "liblog",
-        "libprocinfo",
-    ],
-    target: {
-        darwin: {
-            enabled: false,
-        },
-
-    },
-}
-
-cc_library {
-    name: "libmeminfo",
-    host_supported: true,
-    defaults: ["libmeminfo_defaults"],
-    export_include_dirs: ["include"],
-    export_shared_lib_headers: ["libbase"],
-    srcs: [
-        "pageacct.cpp",
-        "procmeminfo.cpp",
-        "sysmeminfo.cpp",
-    ],
-}
-
-cc_test {
-    name: "libmeminfo_test",
-    defaults: ["libmeminfo_defaults"],
-
-    static_libs: [
-        "libmeminfo",
-        "libbase",
-        "liblog",
-    ],
-
-    srcs: [
-        "libmeminfo_test.cpp"
-    ],
-
-    data: [
-        "testdata1/*",
-        "testdata2/*"
-    ],
-}
-
-cc_benchmark {
-    name: "libmeminfo_benchmark",
-    srcs: [
-        "libmeminfo_benchmark.cpp",
-    ],
-    static_libs : [
-        "libbase",
-        "liblog",
-        "libmeminfo",
-        "libprocinfo",
-    ],
-
-    data: [
-        "testdata1/*",
-    ],
-}
diff --git a/libmeminfo/OWNERS b/libmeminfo/OWNERS
deleted file mode 100644
index 26e71fe..0000000
--- a/libmeminfo/OWNERS
+++ /dev/null
@@ -1 +0,0 @@
-sspatil@google.com
diff --git a/libmeminfo/include/meminfo/meminfo.h b/libmeminfo/include/meminfo/meminfo.h
deleted file mode 100644
index 2fc7867..0000000
--- a/libmeminfo/include/meminfo/meminfo.h
+++ /dev/null
@@ -1,82 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <string.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <string>
-#include <vector>
-
-namespace android {
-namespace meminfo {
-
-struct MemUsage {
-    uint64_t vss;
-    uint64_t rss;
-    uint64_t pss;
-    uint64_t uss;
-
-    uint64_t swap;
-    uint64_t swap_pss;
-
-    uint64_t private_clean;
-    uint64_t private_dirty;
-    uint64_t shared_clean;
-    uint64_t shared_dirty;
-
-    MemUsage()
-        : vss(0),
-          rss(0),
-          pss(0),
-          uss(0),
-          swap(0),
-          swap_pss(0),
-          private_clean(0),
-          private_dirty(0),
-          shared_clean(0),
-          shared_dirty(0) {}
-
-    ~MemUsage() = default;
-
-    void clear() {
-        vss = rss = pss = uss = swap = swap_pss = 0;
-        private_clean = private_dirty = shared_clean = shared_dirty = 0;
-    }
-};
-
-struct Vma {
-    uint64_t start;
-    uint64_t end;
-    uint64_t offset;
-    uint16_t flags;
-    std::string name;
-
-    Vma() : start(0), end(0), offset(0), flags(0), name("") {}
-    Vma(uint64_t s, uint64_t e, uint64_t off, uint16_t f, const char* n)
-        : start(s), end(e), offset(off), flags(f), name(n) {}
-    ~Vma() = default;
-
-    void clear() { memset(&usage, 0, sizeof(usage)); }
-
-    // Memory usage of this mapping.
-    MemUsage usage;
-};
-
-}  // namespace meminfo
-}  // namespace android
diff --git a/libmeminfo/include/meminfo/pageacct.h b/libmeminfo/include/meminfo/pageacct.h
deleted file mode 100644
index 8483d84..0000000
--- a/libmeminfo/include/meminfo/pageacct.h
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <string>
-#include <vector>
-
-#include <android-base/unique_fd.h>
-
-namespace android {
-namespace meminfo {
-
-class PageAcct final {
-    // Class for per-page accounting by using kernel provided interfaces like
-    // kpagecount, kpageflags etc.
-  public:
-    static bool KernelHasPageIdle() {
-        return (access("/sys/kernel/mm/page_idle/bitmap", R_OK | W_OK) == 0);
-    }
-
-    bool InitPageAcct(bool pageidle_enable = false);
-    bool PageFlags(uint64_t pfn, uint64_t* flags);
-    bool PageMapCount(uint64_t pfn, uint64_t* mapcount);
-
-    int IsPageIdle(uint64_t pfn);
-
-    // The only way to create PageAcct object
-    static PageAcct& Instance() {
-        static PageAcct instance;
-        return instance;
-    }
-
-    ~PageAcct() = default;
-
-  private:
-    PageAcct() : kpagecount_fd_(-1), kpageflags_fd_(-1), pageidle_fd_(-1) {}
-    int MarkPageIdle(uint64_t pfn) const;
-    int GetPageIdle(uint64_t pfn) const;
-
-    // Non-copyable & Non-movable
-    PageAcct(const PageAcct&) = delete;
-    PageAcct& operator=(const PageAcct&) = delete;
-    PageAcct& operator=(PageAcct&&) = delete;
-    PageAcct(PageAcct&&) = delete;
-
-    ::android::base::unique_fd kpagecount_fd_;
-    ::android::base::unique_fd kpageflags_fd_;
-    ::android::base::unique_fd pageidle_fd_;
-};
-
-// Returns if the page present bit is set in the value
-// passed in.
-bool page_present(uint64_t pagemap_val);
-
-// Returns if the page swapped bit is set in the value
-// passed in.
-bool page_swapped(uint64_t pagemap_val);
-
-// Returns the page frame number (physical page) from
-// pagemap value
-uint64_t page_pfn(uint64_t pagemap_val);
-
-}  // namespace meminfo
-}  // namespace android
diff --git a/libmeminfo/include/meminfo/procmeminfo.h b/libmeminfo/include/meminfo/procmeminfo.h
deleted file mode 100644
index f782ec5..0000000
--- a/libmeminfo/include/meminfo/procmeminfo.h
+++ /dev/null
@@ -1,129 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <sys/types.h>
-
-#include <string>
-#include <vector>
-
-#include "meminfo.h"
-
-namespace android {
-namespace meminfo {
-
-using VmaCallback = std::function<void(const Vma&)>;
-
-class ProcMemInfo final {
-    // Per-process memory accounting
-  public:
-    // Reset the working set accounting of the process via /proc/<pid>/clear_refs
-    static bool ResetWorkingSet(pid_t pid);
-
-    ProcMemInfo(pid_t pid, bool get_wss = false, uint64_t pgflags = 0, uint64_t pgflags_mask = 0);
-
-    const std::vector<Vma>& Maps();
-    const MemUsage& Usage();
-    const MemUsage& Wss();
-
-    // Same as Maps() except, only valid for reading working set using CONFIG_IDLE_PAGE_TRACKING
-    // support in kernel. If the kernel support doesn't exist, the function will return an empty
-    // vector.
-    const std::vector<Vma>& MapsWithPageIdle();
-
-    // Same as Maps() except, do not read the usage stats for each map.
-    const std::vector<Vma>& MapsWithoutUsageStats();
-
-    // Collect all 'vma' or 'maps' from /proc/<pid>/smaps and store them in 'maps_'. Returns a
-    // constant reference to the vma vector after the collection is done.
-    //
-    // Each 'struct Vma' is *fully* populated by this method (unlike SmapsOrRollup).
-    const std::vector<Vma>& Smaps(const std::string& path = "");
-
-    // This method reads /proc/<pid>/smaps and calls the callback() for each
-    // vma or map that it finds. The map is converted to 'struct Vma' object which is then
-    // passed to the callback.
-    // Returns 'false' if the file is malformed.
-    bool ForEachVma(const VmaCallback& callback);
-
-    // Used to parse either of /proc/<pid>/{smaps, smaps_rollup} and record the process's
-    // Pss and Private memory usage in 'stats'.  In particular, the method only populates the fields
-    // of the MemUsage structure that are intended to be used by Android's periodic Pss collection.
-    //
-    // The method populates the following statistics in order to be fast an efficient.
-    //   Pss
-    //   Rss
-    //   Uss
-    //   private_clean
-    //   private_dirty
-    //   SwapPss
-    // All other fields of MemUsage are zeroed.
-    bool SmapsOrRollup(MemUsage* stats) const;
-
-    // Used to parse either of /proc/<pid>/{smaps, smaps_rollup} and record the process's
-    // Pss.
-    // Returns 'true' on success and the value of Pss in the out parameter.
-    bool SmapsOrRollupPss(uint64_t* pss) const;
-
-    const std::vector<uint16_t>& SwapOffsets();
-
-    // Reads /proc/<pid>/pagemap for this process for each page within
-    // the 'vma' and stores that in 'pagemap'. It is assumed that the 'vma'
-    // is obtained by calling Maps() or 'ForEachVma' for the same object. No special checks
-    // are made to see if 'vma' is *valid*.
-    // Returns false if anything goes wrong, 'true' otherwise.
-    bool PageMap(const Vma& vma, std::vector<uint64_t>* pagemap);
-
-    ~ProcMemInfo() = default;
-
-  private:
-    bool ReadMaps(bool get_wss, bool use_pageidle = false, bool get_usage_stats = true);
-    bool ReadVmaStats(int pagemap_fd, Vma& vma, bool get_wss, bool use_pageidle);
-
-    pid_t pid_;
-    bool get_wss_;
-    uint64_t pgflags_;
-    uint64_t pgflags_mask_;
-
-    std::vector<Vma> maps_;
-
-    MemUsage usage_;
-    std::vector<uint16_t> swap_offsets_;
-};
-
-// Makes callback for each 'vma' or 'map' found in file provided. The file is expected to be in the
-// same format as /proc/<pid>/smaps. Returns 'false' if the file is malformed.
-bool ForEachVmaFromFile(const std::string& path, const VmaCallback& callback);
-
-// Returns if the kernel supports /proc/<pid>/smaps_rollup. Assumes that the
-// calling process has access to the /proc/<pid>/smaps_rollup.
-// Returns 'false' if the calling process has no permission to read the file if it exists
-// of if the file doesn't exist.
-bool IsSmapsRollupSupported(pid_t pid);
-
-// Same as ProcMemInfo::SmapsOrRollup but reads the statistics directly
-// from a file. The file MUST be in the same format as /proc/<pid>/smaps
-// or /proc/<pid>/smaps_rollup
-bool SmapsOrRollupFromFile(const std::string& path, MemUsage* stats);
-
-// Same as ProcMemInfo::SmapsOrRollupPss but reads the statistics directly
-// from a file and returns total Pss in kB. The file MUST be in the same format
-// as /proc/<pid>/smaps or /proc/<pid>/smaps_rollup
-bool SmapsOrRollupPssFromFile(const std::string& path, uint64_t* pss);
-
-}  // namespace meminfo
-}  // namespace android
diff --git a/libmeminfo/include/meminfo/sysmeminfo.h b/libmeminfo/include/meminfo/sysmeminfo.h
deleted file mode 100644
index 8388920..0000000
--- a/libmeminfo/include/meminfo/sysmeminfo.h
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <sys/types.h>
-
-#include <functional>
-#include <map>
-#include <string>
-#include <vector>
-
-namespace android {
-namespace meminfo {
-
-class SysMemInfo final {
-    // System or Global memory accounting
-  public:
-    static constexpr const char* kMemTotal = "MemTotal:";
-    static constexpr const char* kMemFree = "MemFree:";
-    static constexpr const char* kMemBuffers = "Buffers:";
-    static constexpr const char* kMemCached = "Cached:";
-    static constexpr const char* kMemShmem = "Shmem:";
-    static constexpr const char* kMemSlab = "Slab:";
-    static constexpr const char* kMemSReclaim = "SReclaimable:";
-    static constexpr const char* kMemSUnreclaim = "SUnreclaim:";
-    static constexpr const char* kMemSwapTotal = "SwapTotal:";
-    static constexpr const char* kMemSwapFree = "SwapFree:";
-    static constexpr const char* kMemMapped = "Mapped:";
-    static constexpr const char* kMemVmallocUsed = "VmallocUsed:";
-    static constexpr const char* kMemPageTables = "PageTables:";
-    static constexpr const char* kMemKernelStack = "KernelStack:";
-
-    static const std::vector<std::string> kDefaultSysMemInfoTags;
-
-    SysMemInfo() = default;
-
-    // Parse /proc/meminfo and read values that are needed
-    bool ReadMemInfo(const std::string& path = "/proc/meminfo");
-    bool ReadMemInfo(const std::vector<std::string>& tags, std::vector<uint64_t>* out,
-                     const std::string& path = "/proc/meminfo");
-    bool ReadMemInfo(std::vector<uint64_t>* out, const std::string& path = "/proc/meminfo");
-
-    // Parse /proc/vmallocinfo and return total physical memory mapped
-    // in vmalloc area by the kernel.
-    // Note that this deliberately ignores binder buffers. They are _always_
-    // mapped in a process and are counted for in each process.
-    uint64_t ReadVmallocInfo();
-
-    // getters
-    uint64_t mem_total_kb() { return mem_in_kb_[kMemTotal]; }
-    uint64_t mem_free_kb() { return mem_in_kb_[kMemFree]; }
-    uint64_t mem_buffers_kb() { return mem_in_kb_[kMemBuffers]; }
-    uint64_t mem_cached_kb() { return mem_in_kb_[kMemCached]; }
-    uint64_t mem_shmem_kb() { return mem_in_kb_[kMemShmem]; }
-    uint64_t mem_slab_kb() { return mem_in_kb_[kMemSlab]; }
-    uint64_t mem_slab_reclaimable_kb() { return mem_in_kb_[kMemSReclaim]; }
-    uint64_t mem_slab_unreclaimable_kb() { return mem_in_kb_[kMemSUnreclaim]; }
-    uint64_t mem_swap_kb() { return mem_in_kb_[kMemSwapTotal]; }
-    uint64_t mem_swap_free_kb() { return mem_in_kb_[kMemSwapFree]; }
-    uint64_t mem_mapped_kb() { return mem_in_kb_[kMemMapped]; }
-    uint64_t mem_vmalloc_used_kb() { return mem_in_kb_[kMemVmallocUsed]; }
-    uint64_t mem_page_tables_kb() { return mem_in_kb_[kMemPageTables]; }
-    uint64_t mem_kernel_stack_kb() { return mem_in_kb_[kMemKernelStack]; }
-    uint64_t mem_zram_kb(const std::string& zram_dev = "");
-
-  private:
-    std::map<std::string, uint64_t> mem_in_kb_;
-    bool MemZramDevice(const std::string& zram_dev, uint64_t* mem_zram_dev);
-    bool ReadMemInfo(const std::vector<std::string>& tags, const std::string& path,
-                     std::function<void(const std::string&, uint64_t)> store_val);
-};
-
-// Parse /proc/vmallocinfo and return total physical memory mapped
-// in vmalloc area by the kernel. Note that this deliberately ignores binder buffers. They are
-// _always_ mapped in a process and are counted for in each process.
-uint64_t ReadVmallocInfo(const std::string& path = "/proc/vmallocinfo");
-
-}  // namespace meminfo
-}  // namespace android
diff --git a/libmeminfo/libdmabufinfo/Android.bp b/libmeminfo/libdmabufinfo/Android.bp
deleted file mode 100644
index 4aed45c..0000000
--- a/libmeminfo/libdmabufinfo/Android.bp
+++ /dev/null
@@ -1,56 +0,0 @@
-//
-// Copyright (C) 2019 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-cc_defaults {
-    name: "dmabufinfo_defaults",
-    static_libs: [
-        "libbase",
-        "libprocinfo",
-    ],
-    shared_libs: [
-        "liblog",
-    ],
-
-    cflags: [
-        "-Wall",
-        "-Werror",
-        "-Wextra",
-    ],
-}
-
-cc_library_static {
-    name: "libdmabufinfo",
-    vendor_available: true,
-    defaults: ["dmabufinfo_defaults"],
-    export_include_dirs: ["include"],
-    srcs: [
-         "dmabufinfo.cpp",
-    ],
-}
-
-cc_test {
-    name: "dmabufinfo_test",
-    defaults: ["dmabufinfo_defaults"],
-    srcs: [
-         "dmabufinfo_test.cpp"
-    ],
-
-    static_libs: [
-        "libc++fs",
-        "libdmabufinfo",
-        "libion",
-        "libmeminfo",
-    ],
-}
diff --git a/libmeminfo/libdmabufinfo/dmabufinfo.cpp b/libmeminfo/libdmabufinfo/dmabufinfo.cpp
deleted file mode 100644
index 9fb22a1..0000000
--- a/libmeminfo/libdmabufinfo/dmabufinfo.cpp
+++ /dev/null
@@ -1,265 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <dirent.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <filesystem>
-#include <memory>
-#include <string>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/parseint.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-#include <procinfo/process_map.h>
-
-#include <dmabufinfo/dmabufinfo.h>
-
-namespace android {
-namespace dmabufinfo {
-
-static bool FileIsDmaBuf(const std::string& path) {
-    return ::android::base::StartsWith(path, "/dmabuf");
-}
-
-static bool ReadDmaBufFdInfo(pid_t pid, int fd, std::string* name, std::string* exporter,
-                             uint64_t* count) {
-    std::string fdinfo = ::android::base::StringPrintf("/proc/%d/fdinfo/%d", pid, fd);
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(fdinfo.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        LOG(ERROR) << "Failed to open dmabuf info from debugfs";
-        return false;
-    }
-
-    char* line = nullptr;
-    size_t len = 0;
-    while (getline(&line, &len, fp.get()) > 0) {
-        switch (line[0]) {
-            case 'c':
-                if (strncmp(line, "count:", 6) == 0) {
-                    char* c = line + 6;
-                    *count = strtoull(c, nullptr, 10);
-                }
-                break;
-            case 'e':
-                if (strncmp(line, "exp_name:", 9) == 0) {
-                    char* c = line + 9;
-                    *exporter = ::android::base::Trim(c);
-                }
-                break;
-            case 'n':
-                if (strncmp(line, "name:", 5) == 0) {
-                    char* c = line + 5;
-                    *name = ::android::base::Trim(std::string(c));
-                }
-                break;
-        }
-    }
-
-    free(line);
-    return true;
-}
-
-// TODO: std::filesystem::is_symlink fails to link on vendor code,
-// forcing this workaround.
-// Move back to libc++fs once it is vendor-available. See b/124012728
-static bool is_symlink(const char *filename)
-{
-    struct stat p_statbuf;
-    if (lstat(filename, &p_statbuf) < 0) {
-        return false;
-    }
-    if (S_ISLNK(p_statbuf.st_mode) == 1) {
-        return true;
-    }
-    return false;
-}
-
-static bool ReadDmaBufFdRefs(pid_t pid, std::vector<DmaBuffer>* dmabufs) {
-    std::string fdpath = ::android::base::StringPrintf("/proc/%d/fd", pid);
-
-    std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir(fdpath.c_str()), closedir);
-    if (!dir) {
-        LOG(ERROR) << "Failed to open " << fdpath << " directory" << std::endl;
-        return false;
-    }
-    struct dirent* dent;
-    while ((dent = readdir(dir.get()))) {
-        std::string path =
-            ::android::base::StringPrintf("%s/%s", fdpath.c_str(), dent->d_name);
-
-        if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, "..") ||
-            !is_symlink(path.c_str())) {
-            continue;
-        }
-
-        std::string target;
-        if (!::android::base::Readlink(path, &target)) {
-            LOG(ERROR) << "Failed to find target for symlink: " << path;
-            return false;
-        }
-
-        if (!FileIsDmaBuf(target)) {
-            continue;
-        }
-
-        int fd;
-        if (!::android::base::ParseInt(dent->d_name, &fd)) {
-            LOG(ERROR) << "Dmabuf fd: " << path << " is invalid";
-            return false;
-        }
-
-        // Set defaults in case the kernel doesn't give us the information
-        // we need in fdinfo
-        std::string name = "<unknown>";
-        std::string exporter = "<unknown>";
-        uint64_t count = 0;
-        if (!ReadDmaBufFdInfo(pid, fd, &name, &exporter, &count)) {
-            LOG(ERROR) << "Failed to read fdinfo for: " << path;
-            return false;
-        }
-
-        struct stat sb;
-        if (stat(path.c_str(), &sb) < 0) {
-            PLOG(ERROR) << "Failed to stat: " << path;
-            return false;
-        }
-
-        uint64_t inode = sb.st_ino;
-        auto buf = std::find_if(dmabufs->begin(), dmabufs->end(),
-                                [&inode](const DmaBuffer& dbuf) { return dbuf.inode() == inode; });
-        if (buf != dmabufs->end()) {
-            if (buf->name() == "" || buf->name() == "<unknown>") buf->SetName(name);
-            if (buf->exporter() == "" || buf->exporter() == "<unknown>") buf->SetExporter(exporter);
-            if (buf->count() == 0) buf->SetCount(count);
-            buf->AddFdRef(pid);
-            continue;
-        }
-
-        DmaBuffer& db = dmabufs->emplace_back(sb.st_ino, sb.st_blocks * 512, count, exporter, name);
-        db.AddFdRef(pid);
-    }
-
-    return true;
-}
-
-static bool ReadDmaBufMapRefs(pid_t pid, std::vector<DmaBuffer>* dmabufs) {
-    std::string mapspath = ::android::base::StringPrintf("/proc/%d/maps", pid);
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(mapspath.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        LOG(ERROR) << "Failed to open maps for pid: " << pid;
-        return false;
-    }
-
-    char* line = nullptr;
-    size_t len = 0;
-
-    // Process the map if it is dmabuf. Add map reference to existing object in 'dmabufs'
-    // if it was already found. If it wasn't create a new one and append it to 'dmabufs'
-    auto account_dmabuf = [&](uint64_t start, uint64_t end, uint16_t /* flags */,
-                              uint64_t /* pgoff */, ino_t inode, const char* name) {
-        // no need to look into this mapping if it is not dmabuf
-        if (!FileIsDmaBuf(std::string(name))) {
-            return;
-        }
-
-        auto buf = std::find_if(dmabufs->begin(), dmabufs->end(),
-                                [&inode](const DmaBuffer& dbuf) { return dbuf.inode() == inode; });
-        if (buf != dmabufs->end()) {
-            buf->AddMapRef(pid);
-            return;
-        }
-
-        // We have a new buffer, but unknown count and name
-        DmaBuffer& dbuf = dmabufs->emplace_back(inode, end - start, 0, "<unknown>", "<unknown>");
-        dbuf.AddMapRef(pid);
-    };
-
-    while (getline(&line, &len, fp.get()) > 0) {
-        if (!::android::procinfo::ReadMapFileContent(line, account_dmabuf)) {
-            LOG(ERROR) << "Failed t parse maps for pid: " << pid;
-            return false;
-        }
-    }
-
-    free(line);
-    return true;
-}
-
-// Public methods
-bool ReadDmaBufInfo(std::vector<DmaBuffer>* dmabufs, const std::string& path) {
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(path.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        LOG(ERROR) << "Failed to open dmabuf info from debugfs";
-        return false;
-    }
-
-    char* line = nullptr;
-    size_t len = 0;
-    dmabufs->clear();
-    while (getline(&line, &len, fp.get()) > 0) {
-        // The new dmabuf bufinfo format adds inode number and a name at the end
-        // We are looking for lines as follows:
-        // size     flags       mode        count  exp_name ino         name
-        // 01048576 00000002    00000007    00000001    ion 00018758    CAMERA
-        // 01048576 00000002    00000007    00000001    ion 00018758
-        uint64_t size, count;
-        char* exporter_name = nullptr;
-        ino_t inode;
-        char* name = nullptr;
-        int matched = sscanf(line, "%" SCNu64 "%*x %*x %" SCNu64 " %ms %lu %ms", &size, &count,
-                             &exporter_name, &inode, &name);
-        if (matched < 4) {
-            continue;
-        }
-        dmabufs->emplace_back(inode, size, count, exporter_name, matched > 4 ? name : "");
-        free(exporter_name);
-        free(name);
-    }
-
-    free(line);
-
-    return true;
-}
-
-bool ReadDmaBufInfo(pid_t pid, std::vector<DmaBuffer>* dmabufs) {
-    dmabufs->clear();
-    return AppendDmaBufInfo(pid, dmabufs);
-}
-
-bool AppendDmaBufInfo(pid_t pid, std::vector<DmaBuffer>* dmabufs) {
-    if (!ReadDmaBufFdRefs(pid, dmabufs)) {
-        LOG(ERROR) << "Failed to read dmabuf fd references";
-        return false;
-    }
-
-    if (!ReadDmaBufMapRefs(pid, dmabufs)) {
-        LOG(ERROR) << "Failed to read dmabuf map references";
-        return false;
-    }
-    return true;
-}
-
-}  // namespace dmabufinfo
-}  // namespace android
diff --git a/libmeminfo/libdmabufinfo/dmabufinfo_test.cpp b/libmeminfo/libdmabufinfo/dmabufinfo_test.cpp
deleted file mode 100644
index eb53e57..0000000
--- a/libmeminfo/libdmabufinfo/dmabufinfo_test.cpp
+++ /dev/null
@@ -1,484 +0,0 @@
-/* Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <gtest/gtest.h>
-#include <inttypes.h>
-#include <linux/dma-buf.h>
-#include <poll.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <fstream>
-#include <string>
-#include <unordered_map>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/stringprintf.h>
-#include <android-base/unique_fd.h>
-#include <ion/ion.h>
-
-#include <dmabufinfo/dmabufinfo.h>
-
-using namespace ::android::dmabufinfo;
-using namespace ::android::base;
-
-#define MAX_HEAP_NAME 32
-#define ION_HEAP_ANY_MASK (0x7fffffff)
-
-struct ion_heap_data {
-    char name[MAX_HEAP_NAME];
-    __u32 type;
-    __u32 heap_id;
-    __u32 reserved0;
-    __u32 reserved1;
-    __u32 reserved2;
-};
-
-#ifndef DMA_BUF_SET_NAME
-#define DMA_BUF_SET_NAME _IOW(DMA_BUF_BASE, 5, const char*)
-#endif
-
-class fd_sharer {
-  public:
-    fd_sharer();
-    ~fd_sharer() { kill(); }
-
-    bool ok() const { return child_pid > 0; }
-    bool sendfd(int fd);
-    bool kill();
-    pid_t pid() const { return child_pid; }
-
-  private:
-    unique_fd parent_fd, child_fd;
-    pid_t child_pid;
-
-    void run();
-};
-
-fd_sharer::fd_sharer() : parent_fd{}, child_fd{}, child_pid{-1} {
-    bool sp_ok = android::base::Socketpair(SOCK_STREAM, &parent_fd, &child_fd);
-    if (!sp_ok) return;
-
-    child_pid = fork();
-    if (child_pid < 0) return;
-
-    if (child_pid == 0) run();
-}
-
-bool fd_sharer::kill() {
-    int err = ::kill(child_pid, SIGKILL);
-    if (err < 0) return false;
-
-    return ::waitpid(child_pid, nullptr, 0) == child_pid;
-}
-
-void fd_sharer::run() {
-    while (true) {
-        int fd;
-        char unused = 0;
-
-        iovec iov{};
-        iov.iov_base = &unused;
-        iov.iov_len = sizeof(unused);
-
-        msghdr msg{};
-        msg.msg_iov = &iov;
-        msg.msg_iovlen = 1;
-
-        char cmsg_buf[CMSG_SPACE(sizeof(fd))];
-        msg.msg_control = cmsg_buf;
-        msg.msg_controllen = sizeof(cmsg_buf);
-
-        cmsghdr* cmsg = CMSG_FIRSTHDR(&msg);
-        cmsg->cmsg_level = SOL_SOCKET;
-        cmsg->cmsg_type = SCM_RIGHTS;
-        cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
-
-        ssize_t s = TEMP_FAILURE_RETRY(recvmsg(child_fd, &msg, 0));
-        if (s == -1) break;
-
-        s = TEMP_FAILURE_RETRY(write(child_fd, &unused, sizeof(unused)));
-        if (s == -1) break;
-    }
-}
-
-bool fd_sharer::sendfd(int fd) {
-    char unused = 0;
-
-    iovec iov{};
-    iov.iov_base = &unused;
-    iov.iov_len = sizeof(unused);
-
-    msghdr msg{};
-    msg.msg_iov = &iov;
-    msg.msg_iovlen = 1;
-
-    char cmsg_buf[CMSG_SPACE(sizeof(fd))];
-    msg.msg_control = cmsg_buf;
-    msg.msg_controllen = sizeof(cmsg_buf);
-
-    cmsghdr* cmsg = CMSG_FIRSTHDR(&msg);
-    cmsg->cmsg_level = SOL_SOCKET;
-    cmsg->cmsg_type = SCM_RIGHTS;
-    cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
-
-    int* fd_buf = reinterpret_cast<int*>(CMSG_DATA(cmsg));
-    *fd_buf = fd;
-
-    ssize_t s = TEMP_FAILURE_RETRY(sendmsg(parent_fd, &msg, 0));
-    if (s == -1) return false;
-
-    // The target process installs the fd into its fd table during recvmsg().
-    // So if we return now, there's a brief window between sendfd() finishing
-    // and libmemoryinfo actually seeing that the buffer has been shared.  This
-    // window is just large enough to break tests.
-    //
-    // To work around this, wait for the target process to respond with a dummy
-    // byte, with a timeout of 1 s.
-    pollfd p{};
-    p.fd = parent_fd;
-    p.events = POLL_IN;
-    int ready = poll(&p, 1, 1000);
-    if (ready != 1) return false;
-
-    s = TEMP_FAILURE_RETRY(read(parent_fd, &unused, sizeof(unused)));
-    if (s == -1) return false;
-
-    return true;
-}
-
-#define EXPECT_ONE_BUF_EQ(_bufptr, _name, _fdrefs, _maprefs, _expname, _count, _size) \
-    do {                                                                              \
-        EXPECT_EQ(_bufptr->name(), _name);                                            \
-        EXPECT_EQ(_bufptr->fdrefs().size(), _fdrefs);                                 \
-        EXPECT_EQ(_bufptr->maprefs().size(), _maprefs);                               \
-        EXPECT_EQ(_bufptr->exporter(), _expname);                                     \
-        EXPECT_EQ(_bufptr->count(), _count);                                          \
-        EXPECT_EQ(_bufptr->size(), _size);                                            \
-    } while (0)
-
-#define EXPECT_PID_IN_FDREFS(_bufptr, _pid, _expect)                         \
-    do {                                                                     \
-        const std::unordered_map<pid_t, int>& _fdrefs = _bufptr->fdrefs();   \
-        auto _ref = _fdrefs.find(_pid);                                      \
-        EXPECT_EQ((_ref != _fdrefs.end()), _expect);                         \
-    } while (0)
-
-#define EXPECT_PID_IN_MAPREFS(_bufptr, _pid, _expect)                        \
-    do {                                                                     \
-        const std::unordered_map<pid_t, int>& _maprefs = _bufptr->maprefs(); \
-        auto _ref = _maprefs.find(_pid);                                     \
-        EXPECT_EQ((_ref != _maprefs.end()), _expect);                        \
-    } while (0)
-
-TEST(DmaBufInfoParser, TestReadDmaBufInfo) {
-    std::string bufinfo = R"bufinfo(00045056    00000002    00000007    00000002    ion 00022069    
-	Attached Devices:
-Total 0 devices attached
-01048576    00000002    00000007    00000001    ion 00019834    CAMERA
-	Attached Devices:
-	soc:qcom,cam_smmu:msm_cam_smmu_icp
-Total 1 devices attached)bufinfo";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(bufinfo, tf.fd));
-    std::string path = std::string(tf.path);
-
-    std::vector<DmaBuffer> dmabufs;
-    EXPECT_TRUE(ReadDmaBufInfo(&dmabufs, path));
-
-    EXPECT_EQ(dmabufs.size(), 2UL);
-
-    EXPECT_EQ(dmabufs[0].size(), 45056UL);
-    EXPECT_EQ(dmabufs[0].inode(), 22069UL);
-    EXPECT_EQ(dmabufs[0].count(), 2UL);
-    EXPECT_EQ(dmabufs[0].exporter(), "ion");
-    EXPECT_TRUE(dmabufs[0].name().empty());
-    EXPECT_EQ(dmabufs[0].total_refs(), 0ULL);
-    EXPECT_TRUE(dmabufs[0].fdrefs().empty());
-    EXPECT_TRUE(dmabufs[0].maprefs().empty());
-
-    EXPECT_EQ(dmabufs[1].size(), 1048576UL);
-    EXPECT_EQ(dmabufs[1].inode(), 19834UL);
-    EXPECT_EQ(dmabufs[1].count(), 1UL);
-    EXPECT_EQ(dmabufs[1].exporter(), "ion");
-    EXPECT_FALSE(dmabufs[1].name().empty());
-    EXPECT_EQ(dmabufs[1].name(), "CAMERA");
-    EXPECT_EQ(dmabufs[1].total_refs(), 0ULL);
-    EXPECT_TRUE(dmabufs[1].fdrefs().empty());
-    EXPECT_TRUE(dmabufs[1].maprefs().empty());
-}
-
-class DmaBufTester : public ::testing::Test {
-  public:
-    DmaBufTester() : ion_fd(ion_open()), ion_heap_mask(get_ion_heap_mask()) {}
-
-    ~DmaBufTester() {
-        if (is_valid()) {
-            ion_close(ion_fd);
-        }
-    }
-
-    bool is_valid() { return (ion_fd >= 0 && ion_heap_mask > 0); }
-
-    unique_fd allocate(uint64_t size, const std::string& name) {
-        int fd;
-        int err = ion_alloc_fd(ion_fd, size, 0, ion_heap_mask, 0, &fd);
-        if (err < 0) {
-            return unique_fd{err};
-        }
-
-        if (!name.empty()) {
-            err = ioctl(fd, DMA_BUF_SET_NAME, name.c_str());
-            if (err < 0) return unique_fd{-errno};
-        }
-
-        return unique_fd{fd};
-    }
-
-    void readAndCheckDmaBuffer(std::vector<DmaBuffer>* dmabufs, pid_t pid, const std::string name,
-                               size_t fdrefs_size, size_t maprefs_size, const std::string exporter,
-                               size_t refcount, uint64_t buf_size, bool expectFdrefs,
-                               bool expectMapRefs) {
-        EXPECT_TRUE(ReadDmaBufInfo(pid, dmabufs));
-        EXPECT_EQ(dmabufs->size(), 1UL);
-        EXPECT_ONE_BUF_EQ(dmabufs->begin(), name, fdrefs_size, maprefs_size, exporter, refcount,
-                          buf_size);
-        // Make sure the buffer has the right pid too.
-        EXPECT_PID_IN_FDREFS(dmabufs->begin(), pid, expectFdrefs);
-        EXPECT_PID_IN_MAPREFS(dmabufs->begin(), pid, expectMapRefs);
-    }
-
-    bool checkPidRef(DmaBuffer& dmabuf, pid_t pid, int expectFdrefs) {
-        int fdrefs = dmabuf.fdrefs().find(pid)->second;
-        return fdrefs == expectFdrefs;
-    }
-
-  private:
-    int get_ion_heap_mask() {
-        if (ion_fd < 0) {
-            return 0;
-        }
-
-        if (ion_is_legacy(ion_fd)) {
-            // Since ION is still in staging, we've seen that the heap mask ids are also
-            // changed across kernels for some reason. So, here we basically ask for a buffer
-            // from _any_ heap.
-            return ION_HEAP_ANY_MASK;
-        }
-
-        int cnt;
-        int err = ion_query_heap_cnt(ion_fd, &cnt);
-        if (err < 0) {
-            return err;
-        }
-
-        std::vector<ion_heap_data> heaps;
-        heaps.resize(cnt);
-        err = ion_query_get_heaps(ion_fd, cnt, &heaps[0]);
-        if (err < 0) {
-            return err;
-        }
-
-        unsigned int ret = 0;
-        for (auto& it : heaps) {
-            if (!strcmp(it.name, "ion_system_heap")) {
-                ret |= (1 << it.heap_id);
-            }
-        }
-
-        return ret;
-    }
-
-    unique_fd ion_fd;
-    const int ion_heap_mask;
-};
-
-TEST_F(DmaBufTester, TestFdRef) {
-    // Test if a dma buffer is found while the corresponding file descriptor
-    // is open
-    ASSERT_TRUE(is_valid());
-    pid_t pid = getpid();
-    std::vector<DmaBuffer> dmabufs;
-    {
-        // Allocate one buffer and make sure the library can see it
-        unique_fd buf = allocate(4096, "dmabuftester-4k");
-        ASSERT_GT(buf, 0) << "Allocated buffer is invalid";
-        ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-
-        EXPECT_EQ(dmabufs.size(), 1UL);
-        EXPECT_ONE_BUF_EQ(dmabufs.begin(), "dmabuftester-4k", 1UL, 0UL, "ion", 1UL, 4096ULL);
-
-        // Make sure the buffer has the right pid too.
-        EXPECT_PID_IN_FDREFS(dmabufs.begin(), pid, true);
-    }
-
-    // Now make sure the buffer has disappeared
-    ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-    EXPECT_TRUE(dmabufs.empty());
-}
-
-TEST_F(DmaBufTester, TestMapRef) {
-    // Test to make sure we can find a buffer if the fd is closed but the buffer
-    // is mapped
-    ASSERT_TRUE(is_valid());
-    pid_t pid = getpid();
-    std::vector<DmaBuffer> dmabufs;
-    {
-        // Allocate one buffer and make sure the library can see it
-        unique_fd buf = allocate(4096, "dmabuftester-4k");
-        ASSERT_GT(buf, 0) << "Allocated buffer is invalid";
-        auto ptr = mmap(0, 4096, PROT_READ, MAP_SHARED, buf, 0);
-        ASSERT_NE(ptr, MAP_FAILED);
-        ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-
-        EXPECT_EQ(dmabufs.size(), 1UL);
-        EXPECT_ONE_BUF_EQ(dmabufs.begin(), "dmabuftester-4k", 1UL, 1UL, "ion", 2UL, 4096ULL);
-
-        // Make sure the buffer has the right pid too.
-        EXPECT_PID_IN_FDREFS(dmabufs.begin(), pid, true);
-        EXPECT_PID_IN_MAPREFS(dmabufs.begin(), pid, true);
-
-        // close the file descriptor and re-read the stats
-        buf.reset(-1);
-        ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-
-        EXPECT_EQ(dmabufs.size(), 1UL);
-        EXPECT_ONE_BUF_EQ(dmabufs.begin(), "<unknown>", 0UL, 1UL, "<unknown>", 0UL, 4096ULL);
-
-        EXPECT_PID_IN_FDREFS(dmabufs.begin(), pid, false);
-        EXPECT_PID_IN_MAPREFS(dmabufs.begin(), pid, true);
-
-        // unmap the bufer and lose all references
-        munmap(ptr, 4096);
-    }
-
-    // Now make sure the buffer has disappeared
-    ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-    EXPECT_TRUE(dmabufs.empty());
-}
-
-TEST_F(DmaBufTester, TestSharedfd) {
-    // Each time a shared buffer is received over a socket, the remote process
-    // will take an extra reference on it.
-
-    ASSERT_TRUE(is_valid());
-
-    pid_t pid = getpid();
-    std::vector<DmaBuffer> dmabufs;
-    {
-        fd_sharer sharer{};
-        ASSERT_TRUE(sharer.ok());
-        // Allocate one buffer and make sure the library can see it
-        unique_fd buf = allocate(4096, "dmabuftester-4k");
-        ASSERT_GT(buf, 0) << "Allocated buffer is invalid";
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 1UL, 4096ULL, true,
-                              false);
-
-        ASSERT_TRUE(sharer.sendfd(buf));
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 2UL, 4096ULL, true,
-                              false);
-        EXPECT_TRUE(checkPidRef(dmabufs[0], pid, 1));
-        readAndCheckDmaBuffer(&dmabufs, sharer.pid(), "dmabuftester-4k", 1UL, 0UL, "ion", 2UL,
-                              4096ULL, true, false);
-        EXPECT_TRUE(checkPidRef(dmabufs[0], sharer.pid(), 1));
-
-        ASSERT_TRUE(sharer.sendfd(buf));
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 3UL, 4096ULL, true,
-                              false);
-        EXPECT_TRUE(checkPidRef(dmabufs[0], pid, 1));
-        readAndCheckDmaBuffer(&dmabufs, sharer.pid(), "dmabuftester-4k", 1UL, 0UL, "ion", 3UL,
-                              4096ULL, true, false);
-        EXPECT_TRUE(checkPidRef(dmabufs[0], sharer.pid(), 2));
-
-        ASSERT_TRUE(sharer.kill());
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 1UL, 4096ULL, true,
-                              false);
-    }
-
-    // Now make sure the buffer has disappeared
-    ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-    EXPECT_TRUE(dmabufs.empty());
-}
-
-TEST_F(DmaBufTester, DupFdTest) {
-    // dup()ing an fd will make this process take an extra reference on the
-    // shared buffer.
-
-    ASSERT_TRUE(is_valid());
-
-    pid_t pid = getpid();
-    std::vector<DmaBuffer> dmabufs;
-    {
-        // Allocate one buffer and make sure the library can see it
-        unique_fd buf = allocate(4096, "dmabuftester-4k");
-        ASSERT_GT(buf, 0) << "Allocated buffer is invalid";
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 1UL, 4096ULL, true,
-                              false);
-
-        unique_fd buf2{dup(buf)};
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 2UL, 4096ULL, true,
-                              false);
-        EXPECT_TRUE(checkPidRef(dmabufs[0], pid, 2));
-
-        close(buf2.release());
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 1UL, 4096ULL, true,
-                              false);
-        EXPECT_TRUE(checkPidRef(dmabufs[0], pid, 1));
-    }
-
-    // Now make sure the buffer has disappeared
-    ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-    EXPECT_TRUE(dmabufs.empty());
-}
-
-TEST_F(DmaBufTester, ForkTest) {
-    // fork()ing a child will cause the child to automatically take a reference
-    // on any existing shared buffers.
-    ASSERT_TRUE(is_valid());
-
-    pid_t pid = getpid();
-    std::vector<DmaBuffer> dmabufs;
-    {
-        // Allocate one buffer and make sure the library can see it
-        unique_fd buf = allocate(4096, "dmabuftester-4k");
-        ASSERT_GT(buf, 0) << "Allocated buffer is invalid";
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 1UL, 4096ULL, true,
-                              false);
-        fd_sharer sharer{};
-        ASSERT_TRUE(sharer.ok());
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 2UL, 4096ULL, true,
-                              false);
-        readAndCheckDmaBuffer(&dmabufs, sharer.pid(), "dmabuftester-4k", 1UL, 0UL, "ion", 2UL,
-                              4096ULL, true, false);
-        ASSERT_TRUE(sharer.kill());
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 1UL, 4096ULL, true,
-                              false);
-    }
-
-    // Now make sure the buffer has disappeared
-    ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-    EXPECT_TRUE(dmabufs.empty());
-}
-
-int main(int argc, char** argv) {
-    ::testing::InitGoogleTest(&argc, argv);
-    ::android::base::InitLogging(argv, android::base::StderrLogger);
-    return RUN_ALL_TESTS();
-}
diff --git a/libmeminfo/libdmabufinfo/include/dmabufinfo/dmabufinfo.h b/libmeminfo/libdmabufinfo/include/dmabufinfo/dmabufinfo.h
deleted file mode 100644
index a6e7f69..0000000
--- a/libmeminfo/libdmabufinfo/include/dmabufinfo/dmabufinfo.h
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <set>
-#include <string>
-#include <vector>
-#include <unordered_map>
-
-namespace android {
-namespace dmabufinfo {
-
-struct DmaBuffer {
-  public:
-    DmaBuffer(ino_t inode, uint64_t size, uint64_t count, const std::string& exporter,
-              const std::string& name)
-        : inode_(inode), size_(size), count_(count), exporter_(exporter), name_(name) {
-        total_refs_ = 0;
-    }
-    DmaBuffer() = default;
-    ~DmaBuffer() = default;
-
-    // Adds one file descriptor reference for the given pid
-    void AddFdRef(pid_t pid) {
-        AddRefToPidMap(pid, &fdrefs_);
-        total_refs_++;
-    }
-
-    // Adds one map reference for the given pid
-    void AddMapRef(pid_t pid) {
-        AddRefToPidMap(pid, &maprefs_);
-        total_refs_++;
-    }
-
-    // Getters for each property
-    uint64_t size() const { return size_; }
-    const std::unordered_map<pid_t, int>& fdrefs() const { return fdrefs_; }
-    const std::unordered_map<pid_t, int>& maprefs() const { return maprefs_; }
-    ino_t inode() const { return inode_; }
-    uint64_t total_refs() const { return total_refs_; }
-    uint64_t count() const { return count_; };
-    const std::set<pid_t>& pids() const { return pids_; }
-    const std::string& name() const { return name_; }
-    const std::string& exporter() const { return exporter_; }
-    void SetName(const std::string& name) { name_ = name; }
-    void SetExporter(const std::string& exporter) { exporter_ = exporter; }
-    void SetCount(uint64_t count) { count_ = count; }
-    uint64_t Pss() const { return size_ / pids_.size(); }
-
-    bool operator==(const DmaBuffer& rhs) {
-        return (inode_ == rhs.inode()) && (size_ == rhs.size()) && (name_ == rhs.name()) &&
-               (exporter_ == rhs.exporter());
-    }
-
-  private:
-    ino_t inode_;
-    uint64_t size_;
-    uint64_t count_;
-    uint64_t total_refs_;
-    std::set<pid_t> pids_;
-    std::string exporter_;
-    std::string name_;
-    std::unordered_map<pid_t, int> fdrefs_;
-    std::unordered_map<pid_t, int> maprefs_;
-    void AddRefToPidMap(pid_t pid, std::unordered_map<pid_t, int>* map) {
-        // The first time we find a ref, we set the ref count to 1
-        // otherwise, increment the existing ref count
-        auto [it, inserted] = map->insert(std::make_pair(pid, 1));
-        if (!inserted)
-            it->second++;
-        pids_.insert(pid);
-    }
-};
-
-// Read and return current dma buf objects from
-// DEBUGFS/dma_buf/bufinfo. The references to each dma buffer are not
-// populated here and will return an empty vector.
-// Returns false if something went wrong with the function, true otherwise.
-bool ReadDmaBufInfo(std::vector<DmaBuffer>* dmabufs,
-                    const std::string& path = "/sys/kernel/debug/dma_buf/bufinfo");
-
-
-// Read and return dmabuf objects for a given process without the help
-// of DEBUGFS
-// Returns false if something went wrong with the function, true otherwise.
-bool ReadDmaBufInfo(pid_t pid, std::vector<DmaBuffer>* dmabufs);
-
-// Append new dmabuf objects from a given process to an existing vector.
-// When the vector contains an existing element with a matching inode,
-// the reference counts will be updated.
-// Does not depend on DEBUGFS.
-// Returns false if something went wrong with the function, true otherwise.
-bool AppendDmaBufInfo(pid_t pid, std::vector<DmaBuffer>* dmabufs);
-
-}  // namespace dmabufinfo
-}  // namespace android
diff --git a/libmeminfo/libdmabufinfo/tools/dmabuf_dump.cpp b/libmeminfo/libdmabufinfo/tools/dmabuf_dump.cpp
deleted file mode 100644
index 48901b1..0000000
--- a/libmeminfo/libdmabufinfo/tools/dmabuf_dump.cpp
+++ /dev/null
@@ -1,266 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <dirent.h>
-#include <errno.h>
-#include <getopt.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include <fstream>
-#include <iostream>
-#include <map>
-#include <set>
-#include <sstream>
-#include <string>
-#include <vector>
-
-#include <android-base/stringprintf.h>
-#include <dmabufinfo/dmabufinfo.h>
-
-using DmaBuffer = ::android::dmabufinfo::DmaBuffer;
-
-[[noreturn]] static void usage(int exit_status) {
-    fprintf(stderr,
-            "Usage: %s [-ah] [PID] \n"
-            "-a\t show all dma buffers (ion) in big table, [buffer x process] grid \n"
-            "-h\t show this help\n"
-            "  \t If PID is supplied, the dmabuf information for that process is shown.\n",
-            getprogname());
-
-    exit(exit_status);
-}
-
-static std::string GetProcessComm(const pid_t pid) {
-    std::string pid_path = android::base::StringPrintf("/proc/%d/comm", pid);
-    std::ifstream in{pid_path};
-    if (!in) return std::string("N/A");
-    std::string line;
-    std::getline(in, line);
-    if (!in) return std::string("N/A");
-    return line;
-}
-
-static void PrintDmaBufTable(const std::vector<DmaBuffer>& bufs) {
-    if (bufs.empty()) {
-        printf("dmabuf info not found ¯\\_(ツ)_/¯\n");
-        return;
-    }
-
-    // Find all unique pids in the input vector, create a set
-    std::set<pid_t> pid_set;
-    for (auto& buf : bufs) {
-        pid_set.insert(buf.pids().begin(), buf.pids().end());
-    }
-
-    // Format the header string spaced and separated with '|'
-    printf("    Dmabuf Inode |            Size |      Ref Counts |");
-    for (auto pid : pid_set) {
-        printf("%16s:%-5d |", GetProcessComm(pid).c_str(), pid);
-    }
-    printf("\n");
-
-    // holds per-process dmabuf size in kB
-    std::map<pid_t, uint64_t> per_pid_size = {};
-    uint64_t dmabuf_total_size = 0;
-
-    // Iterate through all dmabufs and collect per-process sizes, refs
-    for (auto& buf : bufs) {
-        printf("%16ju |%13" PRIu64 " kB |%16" PRIu64 " |", static_cast<uintmax_t>(buf.inode()),
-               buf.size() / 1024, buf.total_refs());
-        // Iterate through each process to find out per-process references for each buffer,
-        // gather total size used by each process etc.
-        for (pid_t pid : pid_set) {
-            int pid_refs = 0;
-            if (buf.fdrefs().count(pid) == 1) {
-                // Get the total number of ref counts the process is holding
-                // on this buffer. We don't differentiate between mmap or fd.
-                pid_refs += buf.fdrefs().at(pid);
-                if (buf.maprefs().count(pid) == 1) {
-                    pid_refs += buf.maprefs().at(pid);
-                }
-            }
-
-            if (pid_refs) {
-                // Add up the per-pid total size. Note that if a buffer is mapped
-                // in 2 different processes, the size will be shown as mapped or opened
-                // in both processes. This is intended for visibility.
-                //
-                // If one wants to get the total *unique* dma buffers, they can simply
-                // sum the size of all dma bufs shown by the tool
-                per_pid_size[pid] += buf.size() / 1024;
-                printf("%17d refs |", pid_refs);
-            } else {
-                printf("%22s |", "--");
-            }
-        }
-        dmabuf_total_size += buf.size() / 1024;
-        printf("\n");
-    }
-
-    printf("------------------------------------\n");
-    printf("%-16s  %13" PRIu64 " kB |%16s |", "TOTALS", dmabuf_total_size, "n/a");
-    for (auto pid : pid_set) {
-        printf("%19" PRIu64 " kB |", per_pid_size[pid]);
-    }
-    printf("\n");
-
-    return;
-}
-
-static void PrintDmaBufPerProcess(const std::vector<DmaBuffer>& bufs) {
-    if (bufs.empty()) {
-        printf("dmabuf info not found ¯\\_(ツ)_/¯\n");
-        return;
-    }
-
-    // Create a reverse map from pid to dmabufs
-    std::unordered_map<pid_t, std::set<ino_t>> pid_to_inodes = {};
-    uint64_t total_size = 0;  // Total size of dmabufs in the system
-    uint64_t kernel_rss = 0;  // Total size of dmabufs NOT mapped or opened by a process
-    for (auto& buf : bufs) {
-        for (auto pid : buf.pids()) {
-            pid_to_inodes[pid].insert(buf.inode());
-        }
-        total_size += buf.size();
-        if (buf.fdrefs().empty() && buf.maprefs().empty()) {
-            kernel_rss += buf.size();
-        }
-    }
-    // Create an inode to dmabuf map. We know inodes are unique..
-    std::unordered_map<ino_t, DmaBuffer> inode_to_dmabuf;
-    for (auto buf : bufs) {
-        inode_to_dmabuf[buf.inode()] = buf;
-    }
-
-    uint64_t total_rss = 0, total_pss = 0;
-    for (auto& [pid, inodes] : pid_to_inodes) {
-        uint64_t pss = 0;
-        uint64_t rss = 0;
-
-        printf("%16s:%-5d\n", GetProcessComm(pid).c_str(), pid);
-        printf("%22s %16s %16s %16s %16s\n", "Name", "Rss", "Pss", "nr_procs", "Inode");
-        for (auto& inode : inodes) {
-            DmaBuffer& buf = inode_to_dmabuf[inode];
-            printf("%22s %13" PRIu64 " kB %13" PRIu64 " kB %16zu %16" PRIuMAX "\n",
-                   buf.name().empty() ? "<unknown>" : buf.name().c_str(), buf.size() / 1024,
-                   buf.Pss() / 1024, buf.pids().size(), static_cast<uintmax_t>(buf.inode()));
-            rss += buf.size();
-            pss += buf.Pss();
-        }
-        printf("%22s %13" PRIu64 " kB %13" PRIu64 " kB %16s\n", "PROCESS TOTAL", rss / 1024,
-               pss / 1024, "");
-        printf("----------------------\n");
-        total_rss += rss;
-        total_pss += pss;
-    }
-    printf("dmabuf total: %" PRIu64 " kB kernel_rss: %" PRIu64 " kB userspace_rss: %" PRIu64
-           " kB userspace_pss: %" PRIu64 " kB\n ",
-           total_size / 1024, kernel_rss / 1024, total_rss / 1024, total_pss / 1024);
-}
-
-static bool ReadDmaBufs(std::vector<DmaBuffer>* bufs) {
-    bufs->clear();
-
-    if (!ReadDmaBufInfo(bufs)) {
-        fprintf(stderr, "debugfs entry for dmabuf not available, skipping\n");
-        return false;
-    }
-
-    std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir("/proc"), closedir);
-    if (!dir) {
-        fprintf(stderr, "Failed to open /proc directory\n");
-        bufs->clear();
-        return false;
-    }
-
-    struct dirent* dent;
-    while ((dent = readdir(dir.get()))) {
-        if (dent->d_type != DT_DIR) continue;
-
-        int pid = atoi(dent->d_name);
-        if (pid == 0) {
-            continue;
-        }
-
-        if (!AppendDmaBufInfo(pid, bufs)) {
-            fprintf(stderr, "Unable to read dmabuf info for pid %d\n", pid);
-            bufs->clear();
-            return false;
-        }
-    }
-
-    return true;
-}
-
-int main(int argc, char* argv[]) {
-    struct option longopts[] = {{"all", no_argument, nullptr, 'a'},
-                                {"help", no_argument, nullptr, 'h'},
-                                {0, 0, nullptr, 0}};
-
-    int opt;
-    bool show_table = false;
-    while ((opt = getopt_long(argc, argv, "ah", longopts, nullptr)) != -1) {
-        switch (opt) {
-            case 'a':
-                show_table = true;
-                break;
-            case 'h':
-                usage(EXIT_SUCCESS);
-            default:
-                usage(EXIT_FAILURE);
-        }
-    }
-
-    pid_t pid = -1;
-    if (optind < argc) {
-        if (show_table) {
-            fprintf(stderr, "Invalid arguments: -a does not need arguments\n");
-            usage(EXIT_FAILURE);
-        }
-        if (optind != (argc - 1)) {
-            fprintf(stderr, "Invalid arguments - only one [PID] argument is allowed\n");
-            usage(EXIT_FAILURE);
-        }
-        pid = atoi(argv[optind]);
-        if (pid == 0) {
-            fprintf(stderr, "Invalid process id %s\n", argv[optind]);
-            usage(EXIT_FAILURE);
-        }
-    }
-
-    std::vector<DmaBuffer> bufs;
-    if (pid != -1) {
-        if (!ReadDmaBufInfo(pid, &bufs)) {
-            fprintf(stderr, "Unable to read dmabuf info for %d\n", pid);
-            exit(EXIT_FAILURE);
-        }
-    } else {
-        if (!ReadDmaBufs(&bufs)) exit(EXIT_FAILURE);
-    }
-
-    // Show the old dmabuf table, inode x process
-    if (show_table) {
-        PrintDmaBufTable(bufs);
-        return 0;
-    }
-
-    PrintDmaBufPerProcess(bufs);
-
-    return 0;
-}
diff --git a/libmeminfo/libmeminfo_benchmark.cpp b/libmeminfo/libmeminfo_benchmark.cpp
deleted file mode 100644
index d88919b..0000000
--- a/libmeminfo/libmeminfo_benchmark.cpp
+++ /dev/null
@@ -1,544 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <meminfo/procmeminfo.h>
-#include <meminfo/sysmeminfo.h>
-
-#include <fcntl.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include <string>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/stringprintf.h>
-#include <android-base/unique_fd.h>
-
-#include <benchmark/benchmark.h>
-
-using ::android::meminfo::MemUsage;
-using ::android::meminfo::ProcMemInfo;
-using ::android::meminfo::SmapsOrRollupFromFile;
-using ::android::meminfo::SysMemInfo;
-
-enum {
-    MEMINFO_TOTAL,
-    MEMINFO_FREE,
-    MEMINFO_BUFFERS,
-    MEMINFO_CACHED,
-    MEMINFO_SHMEM,
-    MEMINFO_SLAB,
-    MEMINFO_SLAB_RECLAIMABLE,
-    MEMINFO_SLAB_UNRECLAIMABLE,
-    MEMINFO_SWAP_TOTAL,
-    MEMINFO_SWAP_FREE,
-    MEMINFO_ZRAM_TOTAL,
-    MEMINFO_MAPPED,
-    MEMINFO_VMALLOC_USED,
-    MEMINFO_PAGE_TABLES,
-    MEMINFO_KERNEL_STACK,
-    MEMINFO_COUNT
-};
-
-static void get_mem_info(uint64_t mem[], const char* file) {
-    char buffer[4096];
-    unsigned int numFound = 0;
-
-    int fd = open(file, O_RDONLY);
-
-    if (fd < 0) {
-        printf("Unable to open %s: %s\n", file, strerror(errno));
-        return;
-    }
-
-    const int len = read(fd, buffer, sizeof(buffer) - 1);
-    close(fd);
-
-    if (len < 0) {
-        printf("Empty %s\n", file);
-        return;
-    }
-    buffer[len] = 0;
-
-    static const char* const tags[] = {
-            "MemTotal:",     "MemFree:",    "Buffers:",     "Cached:",   "Shmem:", "Slab:",
-            "SReclaimable:", "SUnreclaim:", "SwapTotal:",   "SwapFree:", "ZRam:",  "Mapped:",
-            "VmallocUsed:",  "PageTables:", "KernelStack:", NULL};
-
-    static const int tagsLen[] = {9, 8, 8, 7, 6, 5, 13, 11, 10, 9, 5, 7, 12, 11, 12, 0};
-
-    memset(mem, 0, sizeof(uint64_t) * 15);
-    char* p = buffer;
-    while (*p && (numFound < (sizeof(tagsLen) / sizeof(tagsLen[0])))) {
-        int i = 0;
-        while (tags[i]) {
-            // std::cout << "tag =" << tags[i] << " p = " << std::string(p, tagsLen[i]) <<
-            // std::endl;
-            if (strncmp(p, tags[i], tagsLen[i]) == 0) {
-                p += tagsLen[i];
-                while (*p == ' ') p++;
-                char* num = p;
-                while (*p >= '0' && *p <= '9') p++;
-                if (*p != 0) {
-                    *p = 0;
-                    p++;
-                }
-                mem[i] = atoll(num);
-                numFound++;
-                break;
-            }
-            i++;
-        }
-        while (*p && *p != '\n') {
-            p++;
-        }
-        if (*p) p++;
-    }
-}
-
-static void BM_ReadMemInfo_old(benchmark::State& state) {
-    std::string meminfo = R"meminfo(MemTotal:        3019740 kB
-MemFree:         1809728 kB
-MemAvailable:    2546560 kB
-Buffers:           54736 kB
-Cached:           776052 kB
-SwapCached:            0 kB
-Active:           445856 kB
-Inactive:         459092 kB
-Active(anon):      78492 kB
-Inactive(anon):     2240 kB
-Active(file):     367364 kB
-Inactive(file):   456852 kB
-Unevictable:        3096 kB
-Mlocked:            3096 kB
-SwapTotal:             0 kB
-SwapFree:              0 kB
-Dirty:                32 kB
-Writeback:             0 kB
-AnonPages:         74988 kB
-Mapped:            62624 kB
-Shmem:              4020 kB
-Slab:              86464 kB
-SReclaimable:      44432 kB
-SUnreclaim:        42032 kB
-KernelStack:        4880 kB
-PageTables:         2900 kB
-NFS_Unstable:          0 kB
-Bounce:                0 kB
-WritebackTmp:          0 kB
-CommitLimit:     1509868 kB
-Committed_AS:      80296 kB
-VmallocTotal:   263061440 kB
-VmallocUsed:           0 kB
-VmallocChunk:          0 kB
-AnonHugePages:      6144 kB
-ShmemHugePages:        0 kB
-ShmemPmdMapped:        0 kB
-CmaTotal:         131072 kB
-CmaFree:          130380 kB
-HugePages_Total:       0
-HugePages_Free:        0
-HugePages_Rsvd:        0
-HugePages_Surp:        0
-Hugepagesize:       2048 kB)meminfo";
-
-    TemporaryFile tf;
-    ::android::base::WriteStringToFd(meminfo, tf.fd);
-
-    uint64_t mem[MEMINFO_COUNT];
-    for (auto _ : state) {
-        get_mem_info(mem, tf.path);
-    }
-}
-BENCHMARK(BM_ReadMemInfo_old);
-
-static void BM_ReadMemInfo_new(benchmark::State& state) {
-    std::string meminfo = R"meminfo(MemTotal:        3019740 kB
-MemFree:         1809728 kB
-MemAvailable:    2546560 kB
-Buffers:           54736 kB
-Cached:           776052 kB
-SwapCached:            0 kB
-Active:           445856 kB
-Inactive:         459092 kB
-Active(anon):      78492 kB
-Inactive(anon):     2240 kB
-Active(file):     367364 kB
-Inactive(file):   456852 kB
-Unevictable:        3096 kB
-Mlocked:            3096 kB
-SwapTotal:             0 kB
-SwapFree:              0 kB
-Dirty:                32 kB
-Writeback:             0 kB
-AnonPages:         74988 kB
-Mapped:            62624 kB
-Shmem:              4020 kB
-Slab:              86464 kB
-SReclaimable:      44432 kB
-SUnreclaim:        42032 kB
-KernelStack:        4880 kB
-PageTables:         2900 kB
-NFS_Unstable:          0 kB
-Bounce:                0 kB
-WritebackTmp:          0 kB
-CommitLimit:     1509868 kB
-Committed_AS:      80296 kB
-VmallocTotal:   263061440 kB
-VmallocUsed:           0 kB
-VmallocChunk:          0 kB
-AnonHugePages:      6144 kB
-ShmemHugePages:        0 kB
-ShmemPmdMapped:        0 kB
-CmaTotal:         131072 kB
-CmaFree:          130380 kB
-HugePages_Total:       0
-HugePages_Free:        0
-HugePages_Rsvd:        0
-HugePages_Surp:        0
-Hugepagesize:       2048 kB)meminfo";
-
-    TemporaryFile tf;
-    android::base::WriteStringToFd(meminfo, tf.fd);
-
-    std::string file = std::string(tf.path);
-    std::vector<uint64_t> mem(MEMINFO_COUNT);
-    const std::vector<std::string> tags = {
-            SysMemInfo::kMemTotal,      SysMemInfo::kMemFree,        SysMemInfo::kMemBuffers,
-            SysMemInfo::kMemCached,     SysMemInfo::kMemShmem,       SysMemInfo::kMemSlab,
-            SysMemInfo::kMemSReclaim,   SysMemInfo::kMemSUnreclaim,  SysMemInfo::kMemSwapTotal,
-            SysMemInfo::kMemSwapFree,   SysMemInfo::kMemMapped,      SysMemInfo::kMemVmallocUsed,
-            SysMemInfo::kMemPageTables, SysMemInfo::kMemKernelStack,
-    };
-
-    SysMemInfo smi;
-    for (auto _ : state) {
-        smi.ReadMemInfo(tags, &mem, file);
-    }
-}
-BENCHMARK(BM_ReadMemInfo_new);
-
-static uint64_t get_zram_mem_used(const std::string& zram_dir) {
-    FILE* f = fopen((zram_dir + "mm_stat").c_str(), "r");
-    if (f) {
-        uint64_t mem_used_total = 0;
-
-        int matched = fscanf(f, "%*d %*d %" SCNu64 " %*d %*d %*d %*d", &mem_used_total);
-        if (matched != 1)
-            fprintf(stderr, "warning: failed to parse %s\n", (zram_dir + "mm_stat").c_str());
-
-        fclose(f);
-        return mem_used_total;
-    }
-
-    f = fopen((zram_dir + "mem_used_total").c_str(), "r");
-    if (f) {
-        uint64_t mem_used_total = 0;
-
-        int matched = fscanf(f, "%" SCNu64, &mem_used_total);
-        if (matched != 1)
-            fprintf(stderr, "warning: failed to parse %s\n", (zram_dir + "mem_used_total").c_str());
-
-        fclose(f);
-        return mem_used_total;
-    }
-
-    return 0;
-}
-
-static void BM_ZramTotal_old(benchmark::State& state) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string zram_mmstat_dir = exec_dir + "/testdata1/";
-    for (auto _ : state) {
-        uint64_t zram_total __attribute__((unused)) = get_zram_mem_used(zram_mmstat_dir) / 1024;
-    }
-}
-BENCHMARK(BM_ZramTotal_old);
-
-static void BM_ZramTotal_new(benchmark::State& state) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string zram_mmstat_dir = exec_dir + "/testdata1/";
-    SysMemInfo smi;
-    for (auto _ : state) {
-        uint64_t zram_total __attribute__((unused)) = smi.mem_zram_kb(zram_mmstat_dir);
-    }
-}
-BENCHMARK(BM_ZramTotal_new);
-
-static void BM_MemInfoWithZram_old(benchmark::State& state) {
-    std::string meminfo = R"meminfo(MemTotal:        3019740 kB
-MemFree:         1809728 kB
-MemAvailable:    2546560 kB
-Buffers:           54736 kB
-Cached:           776052 kB
-SwapCached:            0 kB
-Active:           445856 kB
-Inactive:         459092 kB
-Active(anon):      78492 kB
-Inactive(anon):     2240 kB
-Active(file):     367364 kB
-Inactive(file):   456852 kB
-Unevictable:        3096 kB
-Mlocked:            3096 kB
-SwapTotal:             0 kB
-SwapFree:              0 kB
-Dirty:                32 kB
-Writeback:             0 kB
-AnonPages:         74988 kB
-Mapped:            62624 kB
-Shmem:              4020 kB
-Slab:              86464 kB
-SReclaimable:      44432 kB
-SUnreclaim:        42032 kB
-KernelStack:        4880 kB
-PageTables:         2900 kB
-NFS_Unstable:          0 kB
-Bounce:                0 kB
-WritebackTmp:          0 kB
-CommitLimit:     1509868 kB
-Committed_AS:      80296 kB
-VmallocTotal:   263061440 kB
-VmallocUsed:           0 kB
-VmallocChunk:          0 kB
-AnonHugePages:      6144 kB
-ShmemHugePages:        0 kB
-ShmemPmdMapped:        0 kB
-CmaTotal:         131072 kB
-CmaFree:          130380 kB
-HugePages_Total:       0
-HugePages_Free:        0
-HugePages_Rsvd:        0
-HugePages_Surp:        0
-Hugepagesize:       2048 kB)meminfo";
-
-    TemporaryFile tf;
-    ::android::base::WriteStringToFd(meminfo, tf.fd);
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string zram_mmstat_dir = exec_dir + "/testdata1/";
-    uint64_t mem[MEMINFO_COUNT];
-    for (auto _ : state) {
-        get_mem_info(mem, tf.path);
-        mem[MEMINFO_ZRAM_TOTAL] = get_zram_mem_used("/sys/block/zram0/") / 1024;
-        CHECK_EQ(mem[MEMINFO_KERNEL_STACK], 4880u);
-    }
-}
-BENCHMARK(BM_MemInfoWithZram_old);
-
-static void BM_MemInfoWithZram_new(benchmark::State& state) {
-    std::string meminfo = R"meminfo(MemTotal:        3019740 kB
-MemFree:         1809728 kB
-MemAvailable:    2546560 kB
-Buffers:           54736 kB
-Cached:           776052 kB
-SwapCached:            0 kB
-Active:           445856 kB
-Inactive:         459092 kB
-Active(anon):      78492 kB
-Inactive(anon):     2240 kB
-Active(file):     367364 kB
-Inactive(file):   456852 kB
-Unevictable:        3096 kB
-Mlocked:            3096 kB
-SwapTotal:             0 kB
-SwapFree:              0 kB
-Dirty:                32 kB
-Writeback:             0 kB
-AnonPages:         74988 kB
-Mapped:            62624 kB
-Shmem:              4020 kB
-Slab:              86464 kB
-SReclaimable:      44432 kB
-SUnreclaim:        42032 kB
-KernelStack:        4880 kB
-PageTables:         2900 kB
-NFS_Unstable:          0 kB
-Bounce:                0 kB
-WritebackTmp:          0 kB
-CommitLimit:     1509868 kB
-Committed_AS:      80296 kB
-VmallocTotal:   263061440 kB
-VmallocUsed:           0 kB
-VmallocChunk:          0 kB
-AnonHugePages:      6144 kB
-ShmemHugePages:        0 kB
-ShmemPmdMapped:        0 kB
-CmaTotal:         131072 kB
-CmaFree:          130380 kB
-HugePages_Total:       0
-HugePages_Free:        0
-HugePages_Rsvd:        0
-HugePages_Surp:        0
-Hugepagesize:       2048 kB)meminfo";
-
-    TemporaryFile tf;
-    android::base::WriteStringToFd(meminfo, tf.fd);
-
-    std::string file = std::string(tf.path);
-    std::vector<uint64_t> mem(MEMINFO_COUNT);
-    std::vector<std::string> tags(SysMemInfo::kDefaultSysMemInfoTags);
-    auto it = tags.begin();
-    tags.insert(it + MEMINFO_ZRAM_TOTAL, "Zram:");
-    SysMemInfo smi;
-
-    for (auto _ : state) {
-        smi.ReadMemInfo(tags, &mem, file);
-        CHECK_EQ(mem[MEMINFO_KERNEL_STACK], 4880u);
-    }
-}
-BENCHMARK(BM_MemInfoWithZram_new);
-
-// Current implementation is in frameworks/base/core/jni/android_os_Debug.cpp.
-// That implementation is still buggy and it skips over vmalloc allocated memory by kernel modules.
-// This is the *fixed* version of the same implementation intended for benchmarking against the new
-// one.
-static uint64_t get_allocated_vmalloc_memory(const std::string& vm_file) {
-    char line[1024];
-
-    uint64_t vmalloc_allocated_size = 0;
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(vm_file.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        return 0;
-    }
-
-    while (true) {
-        if (fgets(line, 1024, fp.get()) == NULL) {
-            break;
-        }
-
-        // check to see if there are pages mapped in vmalloc area
-        if (!strstr(line, "pages=")) {
-            continue;
-        }
-
-        long nr_pages;
-        if (sscanf(line, "%*x-%*x %*ld %*s pages=%ld", &nr_pages) == 1) {
-            vmalloc_allocated_size += (nr_pages * getpagesize());
-        } else if (sscanf(line, "%*x-%*x %*ld %*s %*s pages=%ld", &nr_pages) == 1) {
-            // The second case is for kernel modules. If allocation comes from the module,
-            // kernel puts an extra string containing the module name before "pages=" in
-            // the line.
-            //    See: https://elixir.bootlin.com/linux/latest/source/kernel/kallsyms.c#L373
-            vmalloc_allocated_size += (nr_pages * getpagesize());
-        }
-    }
-    return vmalloc_allocated_size;
-}
-
-static void BM_VmallocInfo_old_fixed(benchmark::State& state) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string vmallocinfo =
-            ::android::base::StringPrintf("%s/testdata1/vmallocinfo", exec_dir.c_str());
-    for (auto _ : state) {
-        CHECK_EQ(get_allocated_vmalloc_memory(vmallocinfo), 29884416);
-    }
-}
-BENCHMARK(BM_VmallocInfo_old_fixed);
-
-static void BM_VmallocInfo_new(benchmark::State& state) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string vmallocinfo =
-            ::android::base::StringPrintf("%s/testdata1/vmallocinfo", exec_dir.c_str());
-    for (auto _ : state) {
-        CHECK_EQ(::android::meminfo::ReadVmallocInfo(vmallocinfo), 29884416);
-    }
-}
-BENCHMARK(BM_VmallocInfo_new);
-
-// This implementation is picked up as-is from frameworks/base/core/jni/android_os_Debug.cpp
-// and only slightly modified to use std:unique_ptr.
-static bool get_smaps_rollup(const std::string path, MemUsage* rollup) {
-    char lineBuffer[1024];
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(path.c_str(), "re"), fclose};
-    if (fp != nullptr) {
-        char* line;
-        while (true) {
-            if (fgets(lineBuffer, sizeof(lineBuffer), fp.get()) == NULL) {
-                break;
-            }
-            line = lineBuffer;
-
-            switch (line[0]) {
-                case 'P':
-                    if (strncmp(line, "Pss:", 4) == 0) {
-                        char* c = line + 4;
-                        while (*c != 0 && (*c < '0' || *c > '9')) {
-                            c++;
-                        }
-                        rollup->pss += atoi(c);
-                    } else if (strncmp(line, "Private_Clean:", 14) == 0 ||
-                               strncmp(line, "Private_Dirty:", 14) == 0) {
-                        char* c = line + 14;
-                        while (*c != 0 && (*c < '0' || *c > '9')) {
-                            c++;
-                        }
-                        rollup->uss += atoi(c);
-                    }
-                    break;
-                case 'R':
-                    if (strncmp(line, "Rss:", 4) == 0) {
-                        char* c = line + 4;
-                        while (*c != 0 && (*c < '0' || *c > '9')) {
-                            c++;
-                        }
-                        rollup->rss += atoi(c);
-                    }
-                    break;
-                case 'S':
-                    if (strncmp(line, "SwapPss:", 8) == 0) {
-                        char* c = line + 8;
-                        long lSwapPss;
-                        while (*c != 0 && (*c < '0' || *c > '9')) {
-                            c++;
-                        }
-                        lSwapPss = atoi(c);
-                        rollup->swap_pss += lSwapPss;
-                    }
-                    break;
-            }
-        }
-    } else {
-        return false;
-    }
-
-    return true;
-}
-
-static void BM_SmapsRollup_old(benchmark::State& state) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string path = ::android::base::StringPrintf("%s/testdata1/smaps", exec_dir.c_str());
-    for (auto _ : state) {
-        MemUsage stats;
-        CHECK_EQ(get_smaps_rollup(path, &stats), true);
-        CHECK_EQ(stats.pss, 108384);
-    }
-}
-BENCHMARK(BM_SmapsRollup_old);
-
-static void BM_SmapsRollup_new(benchmark::State& state) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string path = ::android::base::StringPrintf("%s/testdata1/smaps", exec_dir.c_str());
-    for (auto _ : state) {
-        MemUsage stats;
-        CHECK_EQ(SmapsOrRollupFromFile(path, &stats), true);
-        CHECK_EQ(stats.pss, 108384);
-    }
-}
-BENCHMARK(BM_SmapsRollup_new);
-
-BENCHMARK_MAIN();
diff --git a/libmeminfo/libmeminfo_test.cpp b/libmeminfo/libmeminfo_test.cpp
deleted file mode 100644
index 4c2be91..0000000
--- a/libmeminfo/libmeminfo_test.cpp
+++ /dev/null
@@ -1,749 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-#include <gtest/gtest.h>
-
-#include <string>
-#include <vector>
-
-#include <meminfo/pageacct.h>
-#include <meminfo/procmeminfo.h>
-#include <meminfo/sysmeminfo.h>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/stringprintf.h>
-
-using namespace std;
-using namespace android::meminfo;
-
-pid_t pid = -1;
-
-TEST(ProcMemInfo, TestWorkingTestReset) {
-    // Expect reset to succeed
-    EXPECT_TRUE(ProcMemInfo::ResetWorkingSet(pid));
-}
-
-TEST(ProcMemInfo, UsageEmpty) {
-    // If we created the object for getting working set,
-    // the usage must be empty
-    ProcMemInfo proc_mem(pid, true);
-    const MemUsage& usage = proc_mem.Usage();
-    EXPECT_EQ(usage.rss, 0);
-    EXPECT_EQ(usage.vss, 0);
-    EXPECT_EQ(usage.pss, 0);
-    EXPECT_EQ(usage.uss, 0);
-    EXPECT_EQ(usage.swap, 0);
-}
-
-TEST(ProcMemInfo, MapsNotEmpty) {
-    // Make sure the process maps are never empty
-    ProcMemInfo proc_mem(pid);
-    const std::vector<Vma>& maps = proc_mem.Maps();
-    EXPECT_FALSE(maps.empty());
-}
-
-TEST(ProcMemInfo, MapsUsageNotEmpty) {
-    ProcMemInfo proc_mem(pid);
-    const std::vector<Vma>& maps = proc_mem.Maps();
-    EXPECT_FALSE(maps.empty());
-    uint64_t total_pss = 0;
-    uint64_t total_rss = 0;
-    uint64_t total_uss = 0;
-    for (auto& map : maps) {
-        ASSERT_NE(0, map.usage.vss);
-        total_rss += map.usage.rss;
-        total_pss += map.usage.pss;
-        total_uss += map.usage.uss;
-    }
-
-    // Crude check that stats are actually being read.
-    EXPECT_NE(0, total_rss) << "RSS zero for all maps, that is not possible.";
-    EXPECT_NE(0, total_pss) << "PSS zero for all maps, that is not possible.";
-    EXPECT_NE(0, total_uss) << "USS zero for all maps, that is not possible.";
-}
-
-TEST(ProcMemInfo, MapsUsageEmpty) {
-    ProcMemInfo proc_mem(pid);
-    const std::vector<Vma>& maps = proc_mem.MapsWithoutUsageStats();
-    EXPECT_FALSE(maps.empty());
-    // Verify that all usage stats are zero in every map.
-    for (auto& map : maps) {
-        ASSERT_EQ(0, map.usage.vss);
-        ASSERT_EQ(0, map.usage.rss);
-        ASSERT_EQ(0, map.usage.pss);
-        ASSERT_EQ(0, map.usage.uss);
-        ASSERT_EQ(0, map.usage.swap);
-        ASSERT_EQ(0, map.usage.swap_pss);
-        ASSERT_EQ(0, map.usage.private_clean);
-        ASSERT_EQ(0, map.usage.private_dirty);
-        ASSERT_EQ(0, map.usage.shared_clean);
-        ASSERT_EQ(0, map.usage.shared_dirty);
-    }
-}
-
-TEST(ProcMemInfo, PageMapPresent) {
-    static constexpr size_t kNumPages = 20;
-    size_t pagesize = getpagesize();
-    void* ptr = mmap(nullptr, pagesize * (kNumPages + 2), PROT_READ | PROT_WRITE,
-                     MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-    ASSERT_NE(MAP_FAILED, ptr);
-
-    // Unmap the first page and the last page so that we guarantee this
-    // map is in a map by itself.
-    ASSERT_EQ(0, munmap(ptr, pagesize));
-    uintptr_t addr = reinterpret_cast<uintptr_t>(ptr) + pagesize;
-    ASSERT_EQ(0, munmap(reinterpret_cast<void*>(addr + kNumPages * pagesize), pagesize));
-
-    ProcMemInfo proc_mem(getpid());
-    const std::vector<Vma>& maps = proc_mem.MapsWithoutUsageStats();
-    ASSERT_FALSE(maps.empty());
-
-    // Find the vma associated with our previously created map.
-    const Vma* test_vma = nullptr;
-    for (const Vma& vma : maps) {
-        if (vma.start == addr) {
-            test_vma = &vma;
-            break;
-        }
-    }
-    ASSERT_TRUE(test_vma != nullptr) << "Cannot find test map.";
-
-    // Verify that none of the pages are listed as present.
-    std::vector<uint64_t> pagemap;
-    ASSERT_TRUE(proc_mem.PageMap(*test_vma, &pagemap));
-    ASSERT_EQ(kNumPages, pagemap.size());
-    for (size_t i = 0; i < pagemap.size(); i++) {
-        EXPECT_FALSE(android::meminfo::page_present(pagemap[i]))
-                << "Page " << i << " is present and it should not be.";
-    }
-
-    // Make some of the pages present and verify that we see them
-    // as present.
-    uint8_t* data = reinterpret_cast<uint8_t*>(addr);
-    data[0] = 1;
-    data[pagesize * 5] = 1;
-    data[pagesize * 11] = 1;
-
-    ASSERT_TRUE(proc_mem.PageMap(*test_vma, &pagemap));
-    ASSERT_EQ(kNumPages, pagemap.size());
-    for (size_t i = 0; i < pagemap.size(); i++) {
-        if (i == 0 || i == 5 || i == 11) {
-            EXPECT_TRUE(android::meminfo::page_present(pagemap[i]))
-                    << "Page " << i << " is not present and it should be.";
-        } else {
-            EXPECT_FALSE(android::meminfo::page_present(pagemap[i]))
-                    << "Page " << i << " is present and it should not be.";
-        }
-    }
-
-    ASSERT_EQ(0, munmap(reinterpret_cast<void*>(addr), kNumPages * pagesize));
-}
-
-TEST(ProcMemInfo, WssEmpty) {
-    // If we created the object for getting usage,
-    // the working set must be empty
-    ProcMemInfo proc_mem(pid, false);
-    const MemUsage& wss = proc_mem.Wss();
-    EXPECT_EQ(wss.rss, 0);
-    EXPECT_EQ(wss.vss, 0);
-    EXPECT_EQ(wss.pss, 0);
-    EXPECT_EQ(wss.uss, 0);
-    EXPECT_EQ(wss.swap, 0);
-}
-
-TEST(ProcMemInfo, SwapOffsetsEmpty) {
-    // If we created the object for getting working set,
-    // the swap offsets must be empty
-    ProcMemInfo proc_mem(pid, true);
-    const std::vector<uint16_t>& swap_offsets = proc_mem.SwapOffsets();
-    EXPECT_EQ(swap_offsets.size(), 0);
-}
-
-TEST(ProcMemInfo, IsSmapsSupportedTest) {
-    // Get any pid and check if /proc/<pid>/smaps_rollup exists using the API.
-    // The API must return the appropriate value regardless of the after it succeeds
-    // once.
-    std::string path = ::android::base::StringPrintf("/proc/%d/smaps_rollup", pid);
-    bool supported = IsSmapsRollupSupported(pid);
-    EXPECT_EQ(!access(path.c_str(), F_OK | R_OK), supported);
-    // Second call must return what the first one returned regardless of the pid parameter.
-    // So, deliberately pass invalid pid.
-    EXPECT_EQ(supported, IsSmapsRollupSupported(-1));
-}
-
-TEST(ProcMemInfo, SmapsOrRollupTest) {
-    // Make sure we can parse 'smaps_rollup' correctly
-    std::string rollup =
-            R"rollup(12c00000-7fe859e000 ---p 00000000 00:00 0                                [rollup]
-Rss:              331908 kB
-Pss:              202052 kB
-Shared_Clean:     158492 kB
-Shared_Dirty:      18928 kB
-Private_Clean:     90472 kB
-Private_Dirty:     64016 kB
-Referenced:       318700 kB
-Anonymous:         81984 kB
-AnonHugePages:         0 kB
-Shared_Hugetlb:        0 kB
-Private_Hugetlb:       0 kB
-Swap:               5344 kB
-SwapPss:             442 kB
-Locked:          1523537 kB)rollup";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(rollup, tf.fd));
-
-    MemUsage stats;
-    ASSERT_EQ(SmapsOrRollupFromFile(tf.path, &stats), true);
-    EXPECT_EQ(stats.rss, 331908);
-    EXPECT_EQ(stats.pss, 202052);
-    EXPECT_EQ(stats.uss, 154488);
-    EXPECT_EQ(stats.private_clean, 90472);
-    EXPECT_EQ(stats.private_dirty, 64016);
-    EXPECT_EQ(stats.swap_pss, 442);
-}
-
-TEST(ProcMemInfo, SmapsOrRollupSmapsTest) {
-    // Make sure /proc/<pid>/smaps is parsed correctly
-    std::string smaps =
-            R"smaps(12c00000-13440000 rw-p 00000000 00:00 0                                  [anon:dalvik-main space (region space)]
-Name:           [anon:dalvik-main space (region space)]
-Size:               8448 kB
-KernelPageSize:        4 kB
-MMUPageSize:           4 kB
-Rss:                2652 kB
-Pss:                2652 kB
-Shared_Clean:        840 kB
-Shared_Dirty:         40 kB
-Private_Clean:        84 kB
-Private_Dirty:      2652 kB
-Referenced:         2652 kB
-Anonymous:          2652 kB
-AnonHugePages:         0 kB
-ShmemPmdMapped:        0 kB
-Shared_Hugetlb:        0 kB
-Private_Hugetlb:       0 kB
-Swap:                102 kB
-SwapPss:              70 kB
-Locked:             2652 kB
-VmFlags: rd wr mr mw me ac 
-)smaps";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(smaps, tf.fd));
-
-    MemUsage stats;
-    ASSERT_EQ(SmapsOrRollupFromFile(tf.path, &stats), true);
-    EXPECT_EQ(stats.rss, 2652);
-    EXPECT_EQ(stats.pss, 2652);
-    EXPECT_EQ(stats.uss, 2736);
-    EXPECT_EQ(stats.private_clean, 84);
-    EXPECT_EQ(stats.private_dirty, 2652);
-    EXPECT_EQ(stats.swap_pss, 70);
-}
-
-TEST(ProcMemInfo, SmapsOrRollupPssRollupTest) {
-    // Make sure /proc/<pid>/smaps is parsed correctly
-    // to get the PSS
-    std::string smaps =
-            R"smaps(12c00000-13440000 rw-p 00000000 00:00 0                                  [anon:dalvik-main space (region space)]
-Name:           [anon:dalvik-main space (region space)]
-Size:               8448 kB
-KernelPageSize:        4 kB
-MMUPageSize:           4 kB
-Rss:                2652 kB
-Pss:                2652 kB
-Shared_Clean:        840 kB
-Shared_Dirty:         40 kB
-Private_Clean:        84 kB
-Private_Dirty:      2652 kB
-Referenced:         2652 kB
-Anonymous:          2652 kB
-AnonHugePages:         0 kB
-ShmemPmdMapped:        0 kB
-Shared_Hugetlb:        0 kB
-Private_Hugetlb:       0 kB
-Swap:                102 kB
-SwapPss:              70 kB
-Locked:             2652 kB
-VmFlags: rd wr mr mw me ac 
-)smaps";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(smaps, tf.fd));
-
-    uint64_t pss;
-    ASSERT_EQ(SmapsOrRollupPssFromFile(tf.path, &pss), true);
-    EXPECT_EQ(pss, 2652);
-}
-
-TEST(ProcMemInfo, SmapsOrRollupPssSmapsTest) {
-    // Correctly parse smaps file to gather pss
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string path = ::android::base::StringPrintf("%s/testdata1/smaps_short", exec_dir.c_str());
-
-    uint64_t pss;
-    ASSERT_EQ(SmapsOrRollupPssFromFile(path, &pss), true);
-    EXPECT_EQ(pss, 19119);
-}
-
-TEST(ProcMemInfo, ForEachVmaFromFileTest) {
-    // Parse smaps file correctly to make callbacks for each virtual memory area (vma)
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string path = ::android::base::StringPrintf("%s/testdata1/smaps_short", exec_dir.c_str());
-    ProcMemInfo proc_mem(pid);
-
-    std::vector<Vma> vmas;
-    auto collect_vmas = [&](const Vma& v) { vmas.push_back(v); };
-    ASSERT_TRUE(ForEachVmaFromFile(path, collect_vmas));
-
-    // We should get a total of 6 vmas
-    ASSERT_EQ(vmas.size(), 6);
-
-    // Expect values to be equal to what we have in testdata1/smaps_short
-    // Check for sizes first
-    ASSERT_EQ(vmas[0].usage.vss, 32768);
-    EXPECT_EQ(vmas[1].usage.vss, 11204);
-    EXPECT_EQ(vmas[2].usage.vss, 16896);
-    EXPECT_EQ(vmas[3].usage.vss, 260);
-    EXPECT_EQ(vmas[4].usage.vss, 6060);
-    EXPECT_EQ(vmas[5].usage.vss, 4);
-
-    // Check for names
-    EXPECT_EQ(vmas[0].name, "[anon:dalvik-zygote-jit-code-cache]");
-    EXPECT_EQ(vmas[1].name, "/system/framework/x86_64/boot-framework.art");
-    EXPECT_EQ(vmas[2].name, "[anon:libc_malloc]");
-    EXPECT_EQ(vmas[3].name, "/system/priv-app/SettingsProvider/oat/x86_64/SettingsProvider.odex");
-    EXPECT_EQ(vmas[4].name, "/system/lib64/libhwui.so");
-    EXPECT_EQ(vmas[5].name, "[vsyscall]");
-
-    EXPECT_EQ(vmas[0].usage.rss, 2048);
-    EXPECT_EQ(vmas[1].usage.rss, 11188);
-    EXPECT_EQ(vmas[2].usage.rss, 15272);
-    EXPECT_EQ(vmas[3].usage.rss, 260);
-    EXPECT_EQ(vmas[4].usage.rss, 4132);
-    EXPECT_EQ(vmas[5].usage.rss, 0);
-
-    EXPECT_EQ(vmas[0].usage.pss, 113);
-    EXPECT_EQ(vmas[1].usage.pss, 2200);
-    EXPECT_EQ(vmas[2].usage.pss, 15272);
-    EXPECT_EQ(vmas[3].usage.pss, 260);
-    EXPECT_EQ(vmas[4].usage.pss, 1274);
-    EXPECT_EQ(vmas[5].usage.pss, 0);
-
-    EXPECT_EQ(vmas[0].usage.uss, 0);
-    EXPECT_EQ(vmas[1].usage.uss, 1660);
-    EXPECT_EQ(vmas[2].usage.uss, 15272);
-    EXPECT_EQ(vmas[3].usage.uss, 260);
-    EXPECT_EQ(vmas[4].usage.uss, 0);
-    EXPECT_EQ(vmas[5].usage.uss, 0);
-
-    EXPECT_EQ(vmas[0].usage.private_clean, 0);
-    EXPECT_EQ(vmas[1].usage.private_clean, 0);
-    EXPECT_EQ(vmas[2].usage.private_clean, 0);
-    EXPECT_EQ(vmas[3].usage.private_clean, 260);
-    EXPECT_EQ(vmas[4].usage.private_clean, 0);
-    EXPECT_EQ(vmas[5].usage.private_clean, 0);
-
-    EXPECT_EQ(vmas[0].usage.private_dirty, 0);
-    EXPECT_EQ(vmas[1].usage.private_dirty, 1660);
-    EXPECT_EQ(vmas[2].usage.private_dirty, 15272);
-    EXPECT_EQ(vmas[3].usage.private_dirty, 0);
-    EXPECT_EQ(vmas[4].usage.private_dirty, 0);
-    EXPECT_EQ(vmas[5].usage.private_dirty, 0);
-
-    EXPECT_EQ(vmas[0].usage.shared_clean, 0);
-    EXPECT_EQ(vmas[1].usage.shared_clean, 80);
-    EXPECT_EQ(vmas[2].usage.shared_clean, 0);
-    EXPECT_EQ(vmas[3].usage.shared_clean, 0);
-    EXPECT_EQ(vmas[4].usage.shared_clean, 4132);
-    EXPECT_EQ(vmas[5].usage.shared_clean, 0);
-
-    EXPECT_EQ(vmas[0].usage.shared_dirty, 2048);
-    EXPECT_EQ(vmas[1].usage.shared_dirty, 9448);
-    EXPECT_EQ(vmas[2].usage.shared_dirty, 0);
-    EXPECT_EQ(vmas[3].usage.shared_dirty, 0);
-    EXPECT_EQ(vmas[4].usage.shared_dirty, 0);
-    EXPECT_EQ(vmas[5].usage.shared_dirty, 0);
-
-    EXPECT_EQ(vmas[0].usage.swap, 0);
-    EXPECT_EQ(vmas[1].usage.swap, 0);
-    EXPECT_EQ(vmas[2].usage.swap, 0);
-    EXPECT_EQ(vmas[3].usage.swap, 0);
-    EXPECT_EQ(vmas[4].usage.swap, 0);
-    EXPECT_EQ(vmas[5].usage.swap, 0);
-
-    EXPECT_EQ(vmas[0].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[1].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[2].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[3].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[4].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[5].usage.swap_pss, 0);
-}
-
-TEST(ProcMemInfo, SmapsReturnTest) {
-    // Make sure Smaps() is never empty for any process
-    ProcMemInfo proc_mem(pid);
-    auto vmas = proc_mem.Smaps();
-    EXPECT_FALSE(vmas.empty());
-}
-
-TEST(ProcMemInfo, SmapsTest) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string path = ::android::base::StringPrintf("%s/testdata1/smaps_short", exec_dir.c_str());
-    ProcMemInfo proc_mem(pid);
-    auto vmas = proc_mem.Smaps(path);
-
-    ASSERT_FALSE(vmas.empty());
-    // We should get a total of 6 vmas
-    ASSERT_EQ(vmas.size(), 6);
-
-    // Expect values to be equal to what we have in testdata1/smaps_short
-    // Check for sizes first
-    ASSERT_EQ(vmas[0].usage.vss, 32768);
-    EXPECT_EQ(vmas[1].usage.vss, 11204);
-    EXPECT_EQ(vmas[2].usage.vss, 16896);
-    EXPECT_EQ(vmas[3].usage.vss, 260);
-    EXPECT_EQ(vmas[4].usage.vss, 6060);
-    EXPECT_EQ(vmas[5].usage.vss, 4);
-
-    // Check for names
-    EXPECT_EQ(vmas[0].name, "[anon:dalvik-zygote-jit-code-cache]");
-    EXPECT_EQ(vmas[1].name, "/system/framework/x86_64/boot-framework.art");
-    EXPECT_EQ(vmas[2].name, "[anon:libc_malloc]");
-    EXPECT_EQ(vmas[3].name, "/system/priv-app/SettingsProvider/oat/x86_64/SettingsProvider.odex");
-    EXPECT_EQ(vmas[4].name, "/system/lib64/libhwui.so");
-    EXPECT_EQ(vmas[5].name, "[vsyscall]");
-
-    EXPECT_EQ(vmas[0].usage.rss, 2048);
-    EXPECT_EQ(vmas[1].usage.rss, 11188);
-    EXPECT_EQ(vmas[2].usage.rss, 15272);
-    EXPECT_EQ(vmas[3].usage.rss, 260);
-    EXPECT_EQ(vmas[4].usage.rss, 4132);
-    EXPECT_EQ(vmas[5].usage.rss, 0);
-
-    EXPECT_EQ(vmas[0].usage.pss, 113);
-    EXPECT_EQ(vmas[1].usage.pss, 2200);
-    EXPECT_EQ(vmas[2].usage.pss, 15272);
-    EXPECT_EQ(vmas[3].usage.pss, 260);
-    EXPECT_EQ(vmas[4].usage.pss, 1274);
-    EXPECT_EQ(vmas[5].usage.pss, 0);
-
-    EXPECT_EQ(vmas[0].usage.uss, 0);
-    EXPECT_EQ(vmas[1].usage.uss, 1660);
-    EXPECT_EQ(vmas[2].usage.uss, 15272);
-    EXPECT_EQ(vmas[3].usage.uss, 260);
-    EXPECT_EQ(vmas[4].usage.uss, 0);
-    EXPECT_EQ(vmas[5].usage.uss, 0);
-
-    EXPECT_EQ(vmas[0].usage.private_clean, 0);
-    EXPECT_EQ(vmas[1].usage.private_clean, 0);
-    EXPECT_EQ(vmas[2].usage.private_clean, 0);
-    EXPECT_EQ(vmas[3].usage.private_clean, 260);
-    EXPECT_EQ(vmas[4].usage.private_clean, 0);
-    EXPECT_EQ(vmas[5].usage.private_clean, 0);
-
-    EXPECT_EQ(vmas[0].usage.private_dirty, 0);
-    EXPECT_EQ(vmas[1].usage.private_dirty, 1660);
-    EXPECT_EQ(vmas[2].usage.private_dirty, 15272);
-    EXPECT_EQ(vmas[3].usage.private_dirty, 0);
-    EXPECT_EQ(vmas[4].usage.private_dirty, 0);
-    EXPECT_EQ(vmas[5].usage.private_dirty, 0);
-
-    EXPECT_EQ(vmas[0].usage.shared_clean, 0);
-    EXPECT_EQ(vmas[1].usage.shared_clean, 80);
-    EXPECT_EQ(vmas[2].usage.shared_clean, 0);
-    EXPECT_EQ(vmas[3].usage.shared_clean, 0);
-    EXPECT_EQ(vmas[4].usage.shared_clean, 4132);
-    EXPECT_EQ(vmas[5].usage.shared_clean, 0);
-
-    EXPECT_EQ(vmas[0].usage.shared_dirty, 2048);
-    EXPECT_EQ(vmas[1].usage.shared_dirty, 9448);
-    EXPECT_EQ(vmas[2].usage.shared_dirty, 0);
-    EXPECT_EQ(vmas[3].usage.shared_dirty, 0);
-    EXPECT_EQ(vmas[4].usage.shared_dirty, 0);
-    EXPECT_EQ(vmas[5].usage.shared_dirty, 0);
-
-    EXPECT_EQ(vmas[0].usage.swap, 0);
-    EXPECT_EQ(vmas[1].usage.swap, 0);
-    EXPECT_EQ(vmas[2].usage.swap, 0);
-    EXPECT_EQ(vmas[3].usage.swap, 0);
-    EXPECT_EQ(vmas[4].usage.swap, 0);
-    EXPECT_EQ(vmas[5].usage.swap, 0);
-
-    EXPECT_EQ(vmas[0].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[1].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[2].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[3].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[4].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[5].usage.swap_pss, 0);
-}
-
-TEST(SysMemInfo, TestSysMemInfoFile) {
-    std::string meminfo = R"meminfo(MemTotal:        3019740 kB
-MemFree:         1809728 kB
-MemAvailable:    2546560 kB
-Buffers:           54736 kB
-Cached:           776052 kB
-SwapCached:            0 kB
-Active:           445856 kB
-Inactive:         459092 kB
-Active(anon):      78492 kB
-Inactive(anon):     2240 kB
-Active(file):     367364 kB
-Inactive(file):   456852 kB
-Unevictable:        3096 kB
-Mlocked:            3096 kB
-SwapTotal:         32768 kB
-SwapFree:           4096 kB
-Dirty:                32 kB
-Writeback:             0 kB
-AnonPages:         74988 kB
-Mapped:            62624 kB
-Shmem:              4020 kB
-Slab:              86464 kB
-SReclaimable:      44432 kB
-SUnreclaim:        42032 kB
-KernelStack:        4880 kB
-PageTables:         2900 kB
-NFS_Unstable:          0 kB
-Bounce:                0 kB
-WritebackTmp:          0 kB
-CommitLimit:     1509868 kB
-Committed_AS:      80296 kB
-VmallocTotal:   263061440 kB
-VmallocUsed:       65536 kB
-VmallocChunk:          0 kB
-AnonHugePages:      6144 kB
-ShmemHugePages:        0 kB
-ShmemPmdMapped:        0 kB
-CmaTotal:         131072 kB
-CmaFree:          130380 kB
-HugePages_Total:       0
-HugePages_Free:        0
-HugePages_Rsvd:        0
-HugePages_Surp:        0
-Hugepagesize:       2048 kB)meminfo";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(meminfo, tf.fd));
-
-    SysMemInfo mi;
-    ASSERT_TRUE(mi.ReadMemInfo(tf.path));
-    EXPECT_EQ(mi.mem_total_kb(), 3019740);
-    EXPECT_EQ(mi.mem_free_kb(), 1809728);
-    EXPECT_EQ(mi.mem_buffers_kb(), 54736);
-    EXPECT_EQ(mi.mem_cached_kb(), 776052);
-    EXPECT_EQ(mi.mem_shmem_kb(), 4020);
-    EXPECT_EQ(mi.mem_slab_kb(), 86464);
-    EXPECT_EQ(mi.mem_slab_reclaimable_kb(), 44432);
-    EXPECT_EQ(mi.mem_slab_unreclaimable_kb(), 42032);
-    EXPECT_EQ(mi.mem_swap_kb(), 32768);
-    EXPECT_EQ(mi.mem_swap_free_kb(), 4096);
-    EXPECT_EQ(mi.mem_mapped_kb(), 62624);
-    EXPECT_EQ(mi.mem_vmalloc_used_kb(), 65536);
-    EXPECT_EQ(mi.mem_page_tables_kb(), 2900);
-    EXPECT_EQ(mi.mem_kernel_stack_kb(), 4880);
-}
-
-TEST(SysMemInfo, TestEmptyFile) {
-    TemporaryFile tf;
-    std::string empty_string = "";
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(empty_string, tf.fd));
-
-    SysMemInfo mi;
-    EXPECT_TRUE(mi.ReadMemInfo(tf.path));
-    EXPECT_EQ(mi.mem_total_kb(), 0);
-}
-
-TEST(SysMemInfo, TestZramTotal) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-
-    SysMemInfo mi;
-    std::string zram_mmstat_dir = exec_dir + "/testdata1/";
-    EXPECT_EQ(mi.mem_zram_kb(zram_mmstat_dir), 30504);
-
-    std::string zram_memused_dir = exec_dir + "/testdata2/";
-    EXPECT_EQ(mi.mem_zram_kb(zram_memused_dir), 30504);
-}
-
-enum {
-    MEMINFO_TOTAL,
-    MEMINFO_FREE,
-    MEMINFO_BUFFERS,
-    MEMINFO_CACHED,
-    MEMINFO_SHMEM,
-    MEMINFO_SLAB,
-    MEMINFO_SLAB_RECLAIMABLE,
-    MEMINFO_SLAB_UNRECLAIMABLE,
-    MEMINFO_SWAP_TOTAL,
-    MEMINFO_SWAP_FREE,
-    MEMINFO_ZRAM_TOTAL,
-    MEMINFO_MAPPED,
-    MEMINFO_VMALLOC_USED,
-    MEMINFO_PAGE_TABLES,
-    MEMINFO_KERNEL_STACK,
-    MEMINFO_COUNT
-};
-
-TEST(SysMemInfo, TestZramWithTags) {
-    std::string meminfo = R"meminfo(MemTotal:        3019740 kB
-MemFree:         1809728 kB
-MemAvailable:    2546560 kB
-Buffers:           54736 kB
-Cached:           776052 kB
-SwapCached:            0 kB
-Active:           445856 kB
-Inactive:         459092 kB
-Active(anon):      78492 kB
-Inactive(anon):     2240 kB
-Active(file):     367364 kB
-Inactive(file):   456852 kB
-Unevictable:        3096 kB
-Mlocked:            3096 kB
-SwapTotal:         32768 kB
-SwapFree:           4096 kB
-Dirty:                32 kB
-Writeback:             0 kB
-AnonPages:         74988 kB
-Mapped:            62624 kB
-Shmem:              4020 kB
-Slab:              86464 kB
-SReclaimable:      44432 kB
-SUnreclaim:        42032 kB
-KernelStack:        4880 kB
-PageTables:         2900 kB
-NFS_Unstable:          0 kB
-Bounce:                0 kB
-WritebackTmp:          0 kB
-CommitLimit:     1509868 kB
-Committed_AS:      80296 kB
-VmallocTotal:   263061440 kB
-VmallocUsed:       65536 kB
-VmallocChunk:          0 kB
-AnonHugePages:      6144 kB
-ShmemHugePages:        0 kB
-ShmemPmdMapped:        0 kB
-CmaTotal:         131072 kB
-CmaFree:          130380 kB
-HugePages_Total:       0
-HugePages_Free:        0
-HugePages_Rsvd:        0
-HugePages_Surp:        0
-Hugepagesize:       2048 kB)meminfo";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(meminfo, tf.fd));
-    std::string file = std::string(tf.path);
-    std::vector<uint64_t> mem(MEMINFO_COUNT);
-    std::vector<std::string> tags(SysMemInfo::kDefaultSysMemInfoTags);
-    auto it = tags.begin();
-    tags.insert(it + MEMINFO_ZRAM_TOTAL, "Zram:");
-    SysMemInfo mi;
-
-    // Read system memory info
-    EXPECT_TRUE(mi.ReadMemInfo(tags, &mem, file));
-
-    EXPECT_EQ(mem[MEMINFO_TOTAL], 3019740);
-    EXPECT_EQ(mem[MEMINFO_FREE], 1809728);
-    EXPECT_EQ(mem[MEMINFO_BUFFERS], 54736);
-    EXPECT_EQ(mem[MEMINFO_CACHED], 776052);
-    EXPECT_EQ(mem[MEMINFO_SHMEM], 4020);
-    EXPECT_EQ(mem[MEMINFO_SLAB], 86464);
-    EXPECT_EQ(mem[MEMINFO_SLAB_RECLAIMABLE], 44432);
-    EXPECT_EQ(mem[MEMINFO_SLAB_UNRECLAIMABLE], 42032);
-    EXPECT_EQ(mem[MEMINFO_SWAP_TOTAL], 32768);
-    EXPECT_EQ(mem[MEMINFO_SWAP_FREE], 4096);
-    EXPECT_EQ(mem[MEMINFO_MAPPED], 62624);
-    EXPECT_EQ(mem[MEMINFO_VMALLOC_USED], 65536);
-    EXPECT_EQ(mem[MEMINFO_PAGE_TABLES], 2900);
-    EXPECT_EQ(mem[MEMINFO_KERNEL_STACK], 4880);
-}
-
-TEST(SysMemInfo, TestVmallocInfoNoMemory) {
-    std::string vmallocinfo =
-            R"vmallocinfo(0x0000000000000000-0x0000000000000000   69632 of_iomap+0x78/0xb0 phys=17a00000 ioremap
-0x0000000000000000-0x0000000000000000    8192 of_iomap+0x78/0xb0 phys=b220000 ioremap
-0x0000000000000000-0x0000000000000000    8192 of_iomap+0x78/0xb0 phys=17c90000 ioremap
-0x0000000000000000-0x0000000000000000    8192 of_iomap+0x78/0xb0 phys=17ca0000 ioremap)vmallocinfo";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(vmallocinfo, tf.fd));
-    std::string file = std::string(tf.path);
-
-    EXPECT_EQ(ReadVmallocInfo(file), 0);
-}
-
-TEST(SysMemInfo, TestVmallocInfoKernel) {
-    std::string vmallocinfo =
-            R"vmallocinfo(0x0000000000000000-0x0000000000000000    8192 drm_property_create_blob+0x44/0xec pages=1 vmalloc)vmallocinfo";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(vmallocinfo, tf.fd));
-    std::string file = std::string(tf.path);
-
-    EXPECT_EQ(ReadVmallocInfo(file), getpagesize());
-}
-
-TEST(SysMemInfo, TestVmallocInfoModule) {
-    std::string vmallocinfo =
-            R"vmallocinfo(0x0000000000000000-0x0000000000000000   28672 pktlog_alloc_buf+0xc4/0x15c [wlan] pages=6 vmalloc)vmallocinfo";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(vmallocinfo, tf.fd));
-    std::string file = std::string(tf.path);
-
-    EXPECT_EQ(ReadVmallocInfo(file), 6 * getpagesize());
-}
-
-TEST(SysMemInfo, TestVmallocInfoAll) {
-    std::string vmallocinfo =
-            R"vmallocinfo(0x0000000000000000-0x0000000000000000   69632 of_iomap+0x78/0xb0 phys=17a00000 ioremap
-0x0000000000000000-0x0000000000000000    8192 of_iomap+0x78/0xb0 phys=b220000 ioremap
-0x0000000000000000-0x0000000000000000    8192 of_iomap+0x78/0xb0 phys=17c90000 ioremap
-0x0000000000000000-0x0000000000000000    8192 of_iomap+0x78/0xb0 phys=17ca0000 ioremap
-0x0000000000000000-0x0000000000000000    8192 drm_property_create_blob+0x44/0xec pages=1 vmalloc
-0x0000000000000000-0x0000000000000000   28672 pktlog_alloc_buf+0xc4/0x15c [wlan] pages=6 vmalloc)vmallocinfo";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(vmallocinfo, tf.fd));
-    std::string file = std::string(tf.path);
-
-    EXPECT_EQ(ReadVmallocInfo(file), 7 * getpagesize());
-}
-
-int main(int argc, char** argv) {
-    ::testing::InitGoogleTest(&argc, argv);
-    ::android::base::InitLogging(argv, android::base::StderrLogger);
-    pid = getpid();
-    return RUN_ALL_TESTS();
-}
diff --git a/libmeminfo/meminfo_private.h b/libmeminfo/meminfo_private.h
deleted file mode 100644
index df5699c..0000000
--- a/libmeminfo/meminfo_private.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <meminfo/meminfo.h>
-#include <meminfo/pageacct.h>
-#include <meminfo/procmeminfo.h>
-#include <meminfo/sysmeminfo.h>
-
-// Macros to do per-page flag manipulation
-#define _BITS(x, offset, bits) (((x) >> (offset)) & ((1LL << (bits)) - 1))
-#define PAGE_PRESENT(x) (_BITS(x, 63, 1))
-#define PAGE_SWAPPED(x) (_BITS(x, 62, 1))
-#define PAGE_SHIFT(x) (_BITS(x, 55, 6))
-#define PAGE_PFN(x) (_BITS(x, 0, 55))
-#define PAGE_SWAP_OFFSET(x) (_BITS(x, 5, 50))
-#define PAGE_SWAP_TYPE(x) (_BITS(x, 0, 5))
diff --git a/libmeminfo/pageacct.cpp b/libmeminfo/pageacct.cpp
deleted file mode 100644
index cb17af8..0000000
--- a/libmeminfo/pageacct.cpp
+++ /dev/null
@@ -1,157 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include <android-base/logging.h>
-#include <android-base/unique_fd.h>
-
-#include "meminfo_private.h"
-
-using unique_fd = ::android::base::unique_fd;
-
-namespace android {
-namespace meminfo {
-
-static inline off64_t pfn_to_idle_bitmap_offset(uint64_t pfn) {
-    return static_cast<off64_t>((pfn >> 6) << 3);
-}
-
-uint64_t pagesize(void) {
-    static uint64_t pagesize = sysconf(_SC_PAGE_SIZE);
-    return pagesize;
-}
-
-bool PageAcct::InitPageAcct(bool pageidle_enable) {
-    if (pageidle_enable && !PageAcct::KernelHasPageIdle()) {
-        LOG(ERROR) << "Idle page tracking is not supported by the kernel";
-        return false;
-    }
-
-    if (kpagecount_fd_ < 0) {
-        unique_fd count_fd(TEMP_FAILURE_RETRY(open("/proc/kpagecount", O_RDONLY | O_CLOEXEC)));
-        if (count_fd < 0) {
-            PLOG(ERROR) << "Failed to open /proc/kpagecount";
-            return false;
-        }
-        kpagecount_fd_ = std::move(count_fd);
-    }
-
-    if (kpageflags_fd_ < 0) {
-        unique_fd flags_fd(TEMP_FAILURE_RETRY(open("/proc/kpageflags", O_RDONLY | O_CLOEXEC)));
-        if (flags_fd < 0) {
-            PLOG(ERROR) << "Failed to open /proc/kpageflags";
-            return false;
-        }
-        kpageflags_fd_ = std::move(flags_fd);
-    }
-
-    if (pageidle_enable && pageidle_fd_ < 0) {
-        unique_fd idle_fd(
-                TEMP_FAILURE_RETRY(open("/sys/kernel/mm/page_idle/bitmap", O_RDWR | O_CLOEXEC)));
-        if (idle_fd < 0) {
-            PLOG(ERROR) << "Failed to open page idle bitmap";
-            return false;
-        }
-        pageidle_fd_ = std::move(idle_fd);
-    }
-
-    return true;
-}
-
-bool PageAcct::PageFlags(uint64_t pfn, uint64_t* flags) {
-    if (!flags) return false;
-
-    if (kpageflags_fd_ < 0) {
-        if (!InitPageAcct()) return false;
-    }
-
-    if (pread64(kpageflags_fd_, flags, sizeof(uint64_t), pfn * sizeof(uint64_t)) !=
-        sizeof(uint64_t)) {
-        PLOG(ERROR) << "Failed to read page flags for page " << pfn;
-        return false;
-    }
-    return true;
-}
-
-bool PageAcct::PageMapCount(uint64_t pfn, uint64_t* mapcount) {
-    if (!mapcount) return false;
-
-    if (kpagecount_fd_ < 0) {
-        if (!InitPageAcct()) return false;
-    }
-
-    if (pread64(kpagecount_fd_, mapcount, sizeof(uint64_t), pfn * sizeof(uint64_t)) !=
-        sizeof(uint64_t)) {
-        PLOG(ERROR) << "Failed to read map count for page " << pfn;
-        return false;
-    }
-    return true;
-}
-
-int PageAcct::IsPageIdle(uint64_t pfn) {
-    if (pageidle_fd_ < 0) {
-        if (!InitPageAcct(true)) return -EOPNOTSUPP;
-    }
-
-    int idle_status = MarkPageIdle(pfn);
-    if (idle_status) return idle_status;
-
-    return GetPageIdle(pfn);
-}
-
-int PageAcct::MarkPageIdle(uint64_t pfn) const {
-    off64_t offset = pfn_to_idle_bitmap_offset(pfn);
-    // set the bit corresponding to page frame
-    uint64_t idle_bits = 1ULL << (pfn % 64);
-
-    if (pwrite64(pageidle_fd_, &idle_bits, sizeof(uint64_t), offset) < 0) {
-        PLOG(ERROR) << "Failed to write page idle bitmap for page " << pfn;
-        return -errno;
-    }
-
-    return 0;
-}
-
-int PageAcct::GetPageIdle(uint64_t pfn) const {
-    off64_t offset = pfn_to_idle_bitmap_offset(pfn);
-    uint64_t idle_bits;
-
-    if (pread64(pageidle_fd_, &idle_bits, sizeof(uint64_t), offset) != sizeof(uint64_t)) {
-        PLOG(ERROR) << "Failed to read page idle bitmap for page " << pfn;
-        return -errno;
-    }
-
-    return !!(idle_bits & (1ULL << (pfn % 64)));
-}
-
-// Public methods
-bool page_present(uint64_t pagemap_val) {
-    return PAGE_PRESENT(pagemap_val);
-}
-
-bool page_swapped(uint64_t pagemap_val) {
-    return PAGE_SWAPPED(pagemap_val);
-}
-
-uint64_t page_pfn(uint64_t pagemap_val) {
-    return PAGE_PFN(pagemap_val);
-}
-
-}  // namespace meminfo
-}  // namespace android
diff --git a/libmeminfo/procmeminfo.cpp b/libmeminfo/procmeminfo.cpp
deleted file mode 100644
index 6f68ab4..0000000
--- a/libmeminfo/procmeminfo.cpp
+++ /dev/null
@@ -1,549 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <linux/kernel-page-flags.h>
-#include <stdio.h>
-#include <unistd.h>
-
-#include <atomic>
-#include <fstream>
-#include <iostream>
-#include <memory>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-#include <android-base/unique_fd.h>
-#include <procinfo/process_map.h>
-
-#include "meminfo_private.h"
-
-namespace android {
-namespace meminfo {
-
-static void add_mem_usage(MemUsage* to, const MemUsage& from) {
-    to->vss += from.vss;
-    to->rss += from.rss;
-    to->pss += from.pss;
-    to->uss += from.uss;
-
-    to->swap += from.swap;
-
-    to->private_clean += from.private_clean;
-    to->private_dirty += from.private_dirty;
-
-    to->shared_clean += from.shared_clean;
-    to->shared_dirty += from.shared_dirty;
-}
-
-// Returns true if the line was valid smaps stats line false otherwise.
-static bool parse_smaps_field(const char* line, MemUsage* stats) {
-    char field[64];
-    int len;
-    if (sscanf(line, "%63s %n", field, &len) == 1 && *field && field[strlen(field) - 1] == ':') {
-        const char* c = line + len;
-        switch (field[0]) {
-            case 'P':
-                if (strncmp(field, "Pss:", 4) == 0) {
-                    stats->pss = strtoull(c, nullptr, 10);
-                } else if (strncmp(field, "Private_Clean:", 14) == 0) {
-                    uint64_t prcl = strtoull(c, nullptr, 10);
-                    stats->private_clean = prcl;
-                    stats->uss += prcl;
-                } else if (strncmp(field, "Private_Dirty:", 14) == 0) {
-                    uint64_t prdi = strtoull(c, nullptr, 10);
-                    stats->private_dirty = prdi;
-                    stats->uss += prdi;
-                }
-                break;
-            case 'S':
-                if (strncmp(field, "Size:", 5) == 0) {
-                    stats->vss = strtoull(c, nullptr, 10);
-                } else if (strncmp(field, "Shared_Clean:", 13) == 0) {
-                    stats->shared_clean = strtoull(c, nullptr, 10);
-                } else if (strncmp(field, "Shared_Dirty:", 13) == 0) {
-                    stats->shared_dirty = strtoull(c, nullptr, 10);
-                } else if (strncmp(field, "Swap:", 5) == 0) {
-                    stats->swap = strtoull(c, nullptr, 10);
-                } else if (strncmp(field, "SwapPss:", 8) == 0) {
-                    stats->swap_pss = strtoull(c, nullptr, 10);
-                }
-                break;
-            case 'R':
-                if (strncmp(field, "Rss:", 4) == 0) {
-                    stats->rss = strtoull(c, nullptr, 10);
-                }
-                break;
-        }
-        return true;
-    }
-
-    return false;
-}
-
-bool ProcMemInfo::ResetWorkingSet(pid_t pid) {
-    std::string clear_refs_path = ::android::base::StringPrintf("/proc/%d/clear_refs", pid);
-    if (!::android::base::WriteStringToFile("1\n", clear_refs_path)) {
-        PLOG(ERROR) << "Failed to write to " << clear_refs_path;
-        return false;
-    }
-
-    return true;
-}
-
-ProcMemInfo::ProcMemInfo(pid_t pid, bool get_wss, uint64_t pgflags, uint64_t pgflags_mask)
-    : pid_(pid), get_wss_(get_wss), pgflags_(pgflags), pgflags_mask_(pgflags_mask) {}
-
-const std::vector<Vma>& ProcMemInfo::Maps() {
-    if (maps_.empty() && !ReadMaps(get_wss_)) {
-        LOG(ERROR) << "Failed to read maps for Process " << pid_;
-    }
-
-    return maps_;
-}
-
-const std::vector<Vma>& ProcMemInfo::MapsWithPageIdle() {
-    if (maps_.empty() && !ReadMaps(get_wss_, true)) {
-        LOG(ERROR) << "Failed to read maps with page idle for Process " << pid_;
-    }
-
-    return maps_;
-}
-
-const std::vector<Vma>& ProcMemInfo::MapsWithoutUsageStats() {
-    if (maps_.empty() && !ReadMaps(get_wss_, false, false)) {
-        LOG(ERROR) << "Failed to read maps for Process " << pid_;
-    }
-
-    return maps_;
-}
-
-const std::vector<Vma>& ProcMemInfo::Smaps(const std::string& path) {
-    if (!maps_.empty()) {
-        return maps_;
-    }
-
-    auto collect_vmas = [&](const Vma& vma) { maps_.emplace_back(vma); };
-    if (path.empty() && !ForEachVma(collect_vmas)) {
-        LOG(ERROR) << "Failed to read smaps for Process " << pid_;
-        maps_.clear();
-    }
-
-    if (!path.empty() && !ForEachVmaFromFile(path, collect_vmas)) {
-        LOG(ERROR) << "Failed to read smaps from file " << path;
-        maps_.clear();
-    }
-
-    return maps_;
-}
-
-const MemUsage& ProcMemInfo::Usage() {
-    if (get_wss_) {
-        LOG(WARNING) << "Trying to read process memory usage for " << pid_
-                     << " using invalid object";
-        return usage_;
-    }
-
-    if (maps_.empty() && !ReadMaps(get_wss_)) {
-        LOG(ERROR) << "Failed to get memory usage for Process " << pid_;
-    }
-
-    return usage_;
-}
-
-const MemUsage& ProcMemInfo::Wss() {
-    if (!get_wss_) {
-        LOG(WARNING) << "Trying to read process working set for " << pid_
-                     << " using invalid object";
-        return usage_;
-    }
-
-    if (maps_.empty() && !ReadMaps(get_wss_)) {
-        LOG(ERROR) << "Failed to get working set for Process " << pid_;
-    }
-
-    return usage_;
-}
-
-bool ProcMemInfo::ForEachVma(const VmaCallback& callback) {
-    std::string path = ::android::base::StringPrintf("/proc/%d/smaps", pid_);
-    return ForEachVmaFromFile(path, callback);
-}
-
-bool ProcMemInfo::SmapsOrRollup(MemUsage* stats) const {
-    std::string path = ::android::base::StringPrintf(
-            "/proc/%d/%s", pid_, IsSmapsRollupSupported(pid_) ? "smaps_rollup" : "smaps");
-    return SmapsOrRollupFromFile(path, stats);
-}
-
-bool ProcMemInfo::SmapsOrRollupPss(uint64_t* pss) const {
-    std::string path = ::android::base::StringPrintf(
-            "/proc/%d/%s", pid_, IsSmapsRollupSupported(pid_) ? "smaps_rollup" : "smaps");
-    return SmapsOrRollupPssFromFile(path, pss);
-}
-
-const std::vector<uint16_t>& ProcMemInfo::SwapOffsets() {
-    if (get_wss_) {
-        LOG(WARNING) << "Trying to read process swap offsets for " << pid_
-                     << " using invalid object";
-        return swap_offsets_;
-    }
-
-    if (maps_.empty() && !ReadMaps(get_wss_)) {
-        LOG(ERROR) << "Failed to get swap offsets for Process " << pid_;
-    }
-
-    return swap_offsets_;
-}
-
-bool ProcMemInfo::PageMap(const Vma& vma, std::vector<uint64_t>* pagemap) {
-    pagemap->clear();
-    std::string pagemap_file = ::android::base::StringPrintf("/proc/%d/pagemap", pid_);
-    ::android::base::unique_fd pagemap_fd(
-            TEMP_FAILURE_RETRY(open(pagemap_file.c_str(), O_RDONLY | O_CLOEXEC)));
-    if (pagemap_fd == -1) {
-        PLOG(ERROR) << "Failed to open " << pagemap_file;
-        return false;
-    }
-
-    uint64_t nr_pages = (vma.end - vma.start) / getpagesize();
-    pagemap->resize(nr_pages);
-
-    size_t bytes_to_read = sizeof(uint64_t) * nr_pages;
-    off64_t start_addr = (vma.start / getpagesize()) * sizeof(uint64_t);
-    ssize_t bytes_read = pread64(pagemap_fd, pagemap->data(), bytes_to_read, start_addr);
-    if (bytes_read == -1) {
-        PLOG(ERROR) << "Failed to read page frames from page map for pid: " << pid_;
-        return false;
-    } else if (static_cast<size_t>(bytes_read) != bytes_to_read) {
-        LOG(ERROR) << "Failed to read page frames from page map for pid: " << pid_
-                   << ": read bytes " << bytes_read << " expected bytes " << bytes_to_read;
-        return false;
-    }
-
-    return true;
-}
-
-bool ProcMemInfo::ReadMaps(bool get_wss, bool use_pageidle, bool get_usage_stats) {
-    // Each object reads /proc/<pid>/maps only once. This is done to make sure programs that are
-    // running for the lifetime of the system can recycle the objects and don't have to
-    // unnecessarily retain and update this object in memory (which can get significantly large).
-    // E.g. A program that only needs to reset the working set will never all ->Maps(), ->Usage().
-    // E.g. A program that is monitoring smaps_rollup, may never call ->maps(), Usage(), so it
-    // doesn't make sense for us to parse and retain unnecessary memory accounting stats by default.
-    if (!maps_.empty()) return true;
-
-    // parse and read /proc/<pid>/maps
-    std::string maps_file = ::android::base::StringPrintf("/proc/%d/maps", pid_);
-    if (!::android::procinfo::ReadMapFile(
-                maps_file, [&](uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, ino_t,
-                               const char* name) {
-                    maps_.emplace_back(Vma(start, end, pgoff, flags, name));
-                })) {
-        LOG(ERROR) << "Failed to parse " << maps_file;
-        maps_.clear();
-        return false;
-    }
-
-    if (!get_usage_stats) {
-        return true;
-    }
-
-    std::string pagemap_file = ::android::base::StringPrintf("/proc/%d/pagemap", pid_);
-    ::android::base::unique_fd pagemap_fd(
-            TEMP_FAILURE_RETRY(open(pagemap_file.c_str(), O_RDONLY | O_CLOEXEC)));
-    if (pagemap_fd < 0) {
-        PLOG(ERROR) << "Failed to open " << pagemap_file;
-        return false;
-    }
-
-    for (auto& vma : maps_) {
-        if (!ReadVmaStats(pagemap_fd.get(), vma, get_wss, use_pageidle)) {
-            LOG(ERROR) << "Failed to read page map for vma " << vma.name << "[" << vma.start << "-"
-                       << vma.end << "]";
-            maps_.clear();
-            return false;
-        }
-        add_mem_usage(&usage_, vma.usage);
-    }
-
-    return true;
-}
-
-bool ProcMemInfo::ReadVmaStats(int pagemap_fd, Vma& vma, bool get_wss, bool use_pageidle) {
-    PageAcct& pinfo = PageAcct::Instance();
-    if (get_wss && use_pageidle && !pinfo.InitPageAcct(true)) {
-        LOG(ERROR) << "Failed to init idle page accounting";
-        return false;
-    }
-
-    uint64_t pagesz = getpagesize();
-    size_t num_pages = (vma.end - vma.start) / pagesz;
-    size_t first_page = vma.start / pagesz;
-
-    std::vector<uint64_t> page_cache;
-    size_t cur_page_cache_index = 0;
-    size_t num_in_page_cache = 0;
-    size_t num_leftover_pages = num_pages;
-    for (size_t cur_page = first_page; cur_page < first_page + num_pages; ++cur_page) {
-        if (!get_wss) {
-            vma.usage.vss += pagesz;
-        }
-
-        // Cache page map data.
-        if (cur_page_cache_index == num_in_page_cache) {
-            static constexpr size_t kMaxPages = 2048;
-            num_leftover_pages -= num_in_page_cache;
-            if (num_leftover_pages > kMaxPages) {
-                num_in_page_cache = kMaxPages;
-            } else {
-                num_in_page_cache = num_leftover_pages;
-            }
-            page_cache.resize(num_in_page_cache);
-            size_t total_bytes = page_cache.size() * sizeof(uint64_t);
-            ssize_t bytes = pread64(pagemap_fd, page_cache.data(), total_bytes,
-                                    cur_page * sizeof(uint64_t));
-            if (bytes != total_bytes) {
-                if (bytes == -1) {
-                    PLOG(ERROR) << "Failed to read page data at offset 0x" << std::hex
-                                << cur_page * sizeof(uint64_t);
-                } else {
-                    LOG(ERROR) << "Failed to read page data at offset 0x" << std::hex
-                               << cur_page * sizeof(uint64_t) << std::dec << " read bytes " << bytes
-                               << " expected bytes " << total_bytes;
-                }
-                return false;
-            }
-            cur_page_cache_index = 0;
-        }
-
-        uint64_t page_info = page_cache[cur_page_cache_index++];
-        if (!PAGE_PRESENT(page_info) && !PAGE_SWAPPED(page_info)) continue;
-
-        if (PAGE_SWAPPED(page_info)) {
-            vma.usage.swap += pagesz;
-            swap_offsets_.emplace_back(PAGE_SWAP_OFFSET(page_info));
-            continue;
-        }
-
-        uint64_t page_frame = PAGE_PFN(page_info);
-        uint64_t cur_page_flags;
-        if (!pinfo.PageFlags(page_frame, &cur_page_flags)) {
-            LOG(ERROR) << "Failed to get page flags for " << page_frame << " in process " << pid_;
-            swap_offsets_.clear();
-            return false;
-        }
-
-        // skip unwanted pages from the count
-        if ((cur_page_flags & pgflags_mask_) != pgflags_) continue;
-
-        uint64_t cur_page_counts;
-        if (!pinfo.PageMapCount(page_frame, &cur_page_counts)) {
-            LOG(ERROR) << "Failed to get page count for " << page_frame << " in process " << pid_;
-            swap_offsets_.clear();
-            return false;
-        }
-
-        // Page was unmapped between the presence check at the beginning of the loop and here.
-        if (cur_page_counts == 0) {
-            continue;
-        }
-
-        bool is_dirty = !!(cur_page_flags & (1 << KPF_DIRTY));
-        bool is_private = (cur_page_counts == 1);
-        // Working set
-        if (get_wss) {
-            bool is_referenced = use_pageidle ? (pinfo.IsPageIdle(page_frame) == 1)
-                                              : !!(cur_page_flags & (1 << KPF_REFERENCED));
-            if (!is_referenced) {
-                continue;
-            }
-            // This effectively makes vss = rss for the working set is requested.
-            // The libpagemap implementation returns vss > rss for
-            // working set, which doesn't make sense.
-            vma.usage.vss += pagesz;
-        }
-
-        vma.usage.rss += pagesz;
-        vma.usage.uss += is_private ? pagesz : 0;
-        vma.usage.pss += pagesz / cur_page_counts;
-        if (is_private) {
-            vma.usage.private_dirty += is_dirty ? pagesz : 0;
-            vma.usage.private_clean += is_dirty ? 0 : pagesz;
-        } else {
-            vma.usage.shared_dirty += is_dirty ? pagesz : 0;
-            vma.usage.shared_clean += is_dirty ? 0 : pagesz;
-        }
-    }
-    return true;
-}
-
-// Public APIs
-bool ForEachVmaFromFile(const std::string& path, const VmaCallback& callback) {
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(path.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        return false;
-    }
-
-    char* line = nullptr;
-    bool parsing_vma = false;
-    ssize_t line_len;
-    size_t line_alloc = 0;
-    Vma vma;
-    while ((line_len = getline(&line, &line_alloc, fp.get())) > 0) {
-        // Make sure the line buffer terminates like a C string for ReadMapFile
-        line[line_len] = '\0';
-
-        if (parsing_vma) {
-            if (parse_smaps_field(line, &vma.usage)) {
-                // This was a stats field
-                continue;
-            }
-
-            // Done collecting stats, make the call back
-            callback(vma);
-            parsing_vma = false;
-        }
-
-        vma.clear();
-        // If it has, we are looking for the vma stats
-        // 00400000-00409000 r-xp 00000000 fc:00 426998  /usr/lib/gvfs/gvfsd-http
-        if (!::android::procinfo::ReadMapFileContent(
-                    line, [&](uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, ino_t,
-                              const char* name) {
-                        vma.start = start;
-                        vma.end = end;
-                        vma.flags = flags;
-                        vma.offset = pgoff;
-                        vma.name = name;
-                    })) {
-            LOG(ERROR) << "Failed to parse " << path;
-            return false;
-        }
-        parsing_vma = true;
-    }
-
-    // free getline() managed buffer
-    free(line);
-
-    if (parsing_vma) {
-        callback(vma);
-    }
-
-    return true;
-}
-
-enum smaps_rollup_support { UNTRIED, SUPPORTED, UNSUPPORTED };
-
-static std::atomic<smaps_rollup_support> g_rollup_support = UNTRIED;
-
-bool IsSmapsRollupSupported(pid_t pid) {
-    // Similar to OpenSmapsOrRollup checks from android_os_Debug.cpp, except
-    // the method only checks if rollup is supported and returns the status
-    // right away.
-    enum smaps_rollup_support rollup_support = g_rollup_support.load(std::memory_order_relaxed);
-    if (rollup_support != UNTRIED) {
-        return rollup_support == SUPPORTED;
-    }
-    std::string rollup_file = ::android::base::StringPrintf("/proc/%d/smaps_rollup", pid);
-    if (access(rollup_file.c_str(), F_OK | R_OK)) {
-        // No check for errno = ENOENT necessary here. The caller MUST fallback to
-        // using /proc/<pid>/smaps instead anyway.
-        g_rollup_support.store(UNSUPPORTED, std::memory_order_relaxed);
-        return false;
-    }
-
-    g_rollup_support.store(SUPPORTED, std::memory_order_relaxed);
-    LOG(INFO) << "Using smaps_rollup for pss collection";
-    return true;
-}
-
-bool SmapsOrRollupFromFile(const std::string& path, MemUsage* stats) {
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(path.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        return false;
-    }
-
-    char* line = nullptr;
-    size_t line_alloc = 0;
-    stats->clear();
-    while (getline(&line, &line_alloc, fp.get()) > 0) {
-        switch (line[0]) {
-            case 'P':
-                if (strncmp(line, "Pss:", 4) == 0) {
-                    char* c = line + 4;
-                    stats->pss += strtoull(c, nullptr, 10);
-                } else if (strncmp(line, "Private_Clean:", 14) == 0) {
-                    char* c = line + 14;
-                    uint64_t prcl = strtoull(c, nullptr, 10);
-                    stats->private_clean += prcl;
-                    stats->uss += prcl;
-                } else if (strncmp(line, "Private_Dirty:", 14) == 0) {
-                    char* c = line + 14;
-                    uint64_t prdi = strtoull(c, nullptr, 10);
-                    stats->private_dirty += prdi;
-                    stats->uss += prdi;
-                }
-                break;
-            case 'R':
-                if (strncmp(line, "Rss:", 4) == 0) {
-                    char* c = line + 4;
-                    stats->rss += strtoull(c, nullptr, 10);
-                }
-                break;
-            case 'S':
-                if (strncmp(line, "SwapPss:", 8) == 0) {
-                    char* c = line + 8;
-                    stats->swap_pss += strtoull(c, nullptr, 10);
-                }
-                break;
-        }
-    }
-
-    // free getline() managed buffer
-    free(line);
-    return true;
-}
-
-bool SmapsOrRollupPssFromFile(const std::string& path, uint64_t* pss) {
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(path.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        return false;
-    }
-    *pss = 0;
-    char* line = nullptr;
-    size_t line_alloc = 0;
-    while (getline(&line, &line_alloc, fp.get()) > 0) {
-        uint64_t v;
-        if (sscanf(line, "Pss: %" SCNu64 " kB", &v) == 1) {
-            *pss += v;
-        }
-    }
-
-    // free getline() managed buffer
-    free(line);
-    return true;
-}
-
-}  // namespace meminfo
-}  // namespace android
diff --git a/libmeminfo/sysmeminfo.cpp b/libmeminfo/sysmeminfo.cpp
deleted file mode 100644
index 5cfa6c3..0000000
--- a/libmeminfo/sysmeminfo.cpp
+++ /dev/null
@@ -1,275 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <algorithm>
-#include <cctype>
-#include <cstdio>
-#include <fstream>
-#include <iterator>
-#include <sstream>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/parseint.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-#include <android-base/unique_fd.h>
-
-#include "meminfo_private.h"
-
-namespace android {
-namespace meminfo {
-
-const std::vector<std::string> SysMemInfo::kDefaultSysMemInfoTags = {
-        SysMemInfo::kMemTotal,      SysMemInfo::kMemFree,        SysMemInfo::kMemBuffers,
-        SysMemInfo::kMemCached,     SysMemInfo::kMemShmem,       SysMemInfo::kMemSlab,
-        SysMemInfo::kMemSReclaim,   SysMemInfo::kMemSUnreclaim,  SysMemInfo::kMemSwapTotal,
-        SysMemInfo::kMemSwapFree,   SysMemInfo::kMemMapped,      SysMemInfo::kMemVmallocUsed,
-        SysMemInfo::kMemPageTables, SysMemInfo::kMemKernelStack,
-};
-
-bool SysMemInfo::ReadMemInfo(const std::string& path) {
-    return ReadMemInfo(SysMemInfo::kDefaultSysMemInfoTags, path,
-                       [&](const std::string& tag, uint64_t val) { mem_in_kb_[tag] = val; });
-}
-
-bool SysMemInfo::ReadMemInfo(std::vector<uint64_t>* out, const std::string& path) {
-    return ReadMemInfo(SysMemInfo::kDefaultSysMemInfoTags, out, path);
-}
-
-bool SysMemInfo::ReadMemInfo(const std::vector<std::string>& tags, std::vector<uint64_t>* out,
-                             const std::string& path) {
-    out->clear();
-    out->resize(tags.size());
-
-    return ReadMemInfo(tags, path, [&]([[maybe_unused]] const std::string& tag, uint64_t val) {
-        auto it = std::find(tags.begin(), tags.end(), tag);
-        if (it == tags.end()) {
-            LOG(ERROR) << "Tried to store invalid tag: " << tag;
-            return;
-        }
-        auto index = std::distance(tags.begin(), it);
-        // store the values in the same order as the tags
-        out->at(index) = val;
-    });
-}
-
-uint64_t SysMemInfo::ReadVmallocInfo() {
-    return ::android::meminfo::ReadVmallocInfo();
-}
-
-// TODO: Delete this function if it can't match up with the c-like implementation below.
-// Currently, this added about 50 % extra overhead on hikey.
-#if 0
-bool SysMemInfo::ReadMemInfo(const std::vector<std::string>& tags, const std::string& path) {
-    std::string buffer;
-    if (!::android::base::ReadFileToString(path, &buffer)) {
-        PLOG(ERROR) << "Failed to read : " << path;
-        return false;
-    }
-
-    uint32_t total_found = 0;
-    for (auto s = buffer.begin(); s < buffer.end() && total_found < tags.size();) {
-        for (auto& tag : tags) {
-            if (tag == std::string(s, s + tag.size())) {
-                s += tag.size();
-                while (isspace(*s)) s++;
-                auto num_start = s;
-                while (std::isdigit(*s)) s++;
-
-                std::string number(num_start, num_start + (s - num_start));
-                if (!::android::base::ParseUint(number, &mem_in_kb_[tag])) {
-                    LOG(ERROR) << "Failed to parse uint";
-                    return false;
-                }
-                total_found++;
-                break;
-            }
-        }
-        while (s < buffer.end() && *s != '\n') s++;
-        if (s < buffer.end()) s++;
-    }
-
-    return true;
-}
-
-#else
-bool SysMemInfo::ReadMemInfo(const std::vector<std::string>& tags, const std::string& path,
-                             std::function<void(const std::string&, uint64_t)> store_val) {
-    char buffer[4096];
-    int fd = open(path.c_str(), O_RDONLY | O_CLOEXEC);
-    if (fd < 0) {
-        PLOG(ERROR) << "Failed to open file :" << path;
-        return false;
-    }
-
-    const int len = read(fd, buffer, sizeof(buffer) - 1);
-    close(fd);
-    if (len < 0) {
-        return false;
-    }
-
-    buffer[len] = '\0';
-    char* p = buffer;
-    uint32_t found = 0;
-    uint32_t lineno = 0;
-    bool zram_tag_found = false;
-    while (*p && found < tags.size()) {
-        for (auto& tag : tags) {
-            // Special case for "Zram:" tag that android_os_Debug and friends look
-            // up along with the rest of the numbers from /proc/meminfo
-            if (!zram_tag_found && tag == "Zram:") {
-                store_val(tag, mem_zram_kb());
-                zram_tag_found = true;
-                found++;
-                continue;
-            }
-
-            if (strncmp(p, tag.c_str(), tag.size()) == 0) {
-                p += tag.size();
-                while (*p == ' ') p++;
-                char* endptr = nullptr;
-                uint64_t val = strtoull(p, &endptr, 10);
-                if (p == endptr) {
-                    PLOG(ERROR) << "Failed to parse line:" << lineno + 1 << " in file: " << path;
-                    return false;
-                }
-                store_val(tag, val);
-                p = endptr;
-                found++;
-                break;
-            }
-        }
-
-        while (*p && *p != '\n') {
-            p++;
-        }
-        if (*p) p++;
-        lineno++;
-    }
-
-    return true;
-}
-#endif
-
-uint64_t SysMemInfo::mem_zram_kb(const std::string& zram_dev) {
-    uint64_t mem_zram_total = 0;
-    if (!zram_dev.empty()) {
-        if (!MemZramDevice(zram_dev, &mem_zram_total)) {
-            return 0;
-        }
-        return mem_zram_total / 1024;
-    }
-
-    constexpr uint32_t kMaxZramDevices = 256;
-    for (uint32_t i = 0; i < kMaxZramDevices; i++) {
-        std::string zram_dev = ::android::base::StringPrintf("/sys/block/zram%u/", i);
-        if (access(zram_dev.c_str(), F_OK)) {
-            // We assume zram devices appear in range 0-255 and appear always in sequence
-            // under /sys/block. So, stop looking for them once we find one is missing.
-            break;
-        }
-
-        uint64_t mem_zram_dev;
-        if (!MemZramDevice(zram_dev, &mem_zram_dev)) {
-            return 0;
-        }
-
-        mem_zram_total += mem_zram_dev;
-    }
-
-    return mem_zram_total / 1024;
-}
-
-bool SysMemInfo::MemZramDevice(const std::string& zram_dev, uint64_t* mem_zram_dev) {
-    std::string mmstat = ::android::base::StringPrintf("%s/%s", zram_dev.c_str(), "mm_stat");
-    auto mmstat_fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(mmstat.c_str(), "re"), fclose};
-    if (mmstat_fp != nullptr) {
-        // only if we do have mmstat, use it. Otherwise, fall through to trying out the old
-        // 'mem_used_total'
-        if (fscanf(mmstat_fp.get(), "%*" SCNu64 " %*" SCNu64 " %" SCNu64, mem_zram_dev) != 1) {
-            PLOG(ERROR) << "Malformed mm_stat file in: " << zram_dev;
-            return false;
-        }
-        return true;
-    }
-
-    std::string content;
-    if (::android::base::ReadFileToString(zram_dev + "mem_used_total", &content)) {
-        *mem_zram_dev = strtoull(content.c_str(), NULL, 10);
-        if (*mem_zram_dev == ULLONG_MAX) {
-            PLOG(ERROR) << "Malformed mem_used_total file for zram dev: " << zram_dev
-                        << " content: " << content;
-            return false;
-        }
-
-        return true;
-    }
-
-    LOG(ERROR) << "Can't find memory status under: " << zram_dev;
-    return false;
-}
-
-// Public methods
-uint64_t ReadVmallocInfo(const std::string& path) {
-    uint64_t vmalloc_total = 0;
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(path.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        return vmalloc_total;
-    }
-
-    char* line = nullptr;
-    size_t line_alloc = 0;
-    while (getline(&line, &line_alloc, fp.get()) > 0) {
-        // We are looking for lines like
-        //
-        // 0x0000000000000000-0x0000000000000000   12288 drm_property_create_blob+0x44/0xec pages=2 vmalloc
-        // 0x0000000000000000-0x0000000000000000    8192 wlan_logging_sock_init_svc+0xf8/0x4f0 [wlan] pages=1 vmalloc
-        //
-        // Notice that if the caller is coming from a module, the kernel prints and extra
-        // "[module_name]" after the address and the symbol of the call site. This means we can't
-        // use the old sscanf() method of getting the # of pages.
-        char* p_start = strstr(line, "pages=");
-        if (p_start == nullptr) {
-            // we didn't find anything
-            continue;
-        }
-
-        uint64_t nr_pages;
-        if (sscanf(p_start, "pages=%" SCNu64 "", &nr_pages) == 1) {
-            vmalloc_total += (nr_pages * getpagesize());
-        }
-    }
-
-    free(line);
-
-    return vmalloc_total;
-}
-
-}  // namespace meminfo
-}  // namespace android
diff --git a/libmeminfo/testdata1/mm_stat b/libmeminfo/testdata1/mm_stat
deleted file mode 100644
index 32b325f..0000000
--- a/libmeminfo/testdata1/mm_stat
+++ /dev/null
@@ -1 +0,0 @@
- 145674240 26801454 31236096        0 45772800     3042     1887      517
diff --git a/libmeminfo/testdata1/showmap_test.sh b/libmeminfo/testdata1/showmap_test.sh
deleted file mode 100755
index 8ee713e..0000000
--- a/libmeminfo/testdata1/showmap_test.sh
+++ /dev/null
@@ -1,86 +0,0 @@
-#! /system/bin/sh
-
-TESTDATA_PATH=/data/nativetest64/libmeminfo_test/testdata1
-SMAPS=$TESTDATA_PATH/smaps
-OUT1=$TMPDIR/1.txt
-OUT2=$TMPDIR/2.txt
-
-showmap -f $SMAPS > $OUT1
-showmap2 -f $SMAPS > $OUT2
-diff $OUT1 $OUT2 > /dev/null
-ret=$?
-if [[ $ret != 0 ]]; then
-    echo "fail: showmap -f <smaps>";
-else
-    echo "pass: showmap -f <smaps>"
-fi
-
-showmap -q -f $SMAPS > $OUT1
-showmap2 -q -f $SMAPS > $OUT2
-diff $OUT1 $OUT2 > /dev/null
-ret=$?
-if [[ $ret != 0 ]]; then
-    echo "fail: showmap -q -f <smaps>";
-else
-    echo "pass: showmap -q -f <smaps>"
-fi
-
-showmap -v -f $SMAPS > $OUT1
-showmap2 -v -f $SMAPS > $OUT2
-diff $OUT1 $OUT2 > /dev/null
-ret=$?
-if [[ $ret != 0 ]]; then
-    echo "fail: showmap -v -f <smaps>";
-else
-    echo "pass: showmap -v -f <smaps>"
-fi
-
-showmap -a -f $SMAPS > $OUT1
-showmap2 -a -f $SMAPS > $OUT2
-diff $OUT1 $OUT2 > /dev/null
-ret=$?
-if [[ $ret != 0 ]]; then
-    echo "fail: showmap -a -f <smaps>";
-else
-    echo "pass: showmap -a -f <smaps>"
-fi
-
-# Note that all tests from here down that have the option
-# '-a' added to the command are expected to fail as
-# 'showmap2' actually fixes the 64-bit address truncating
-# that was already happening with showmap
-showmap -a -t -f $SMAPS > $OUT1
-showmap2 -a -t -f $SMAPS > $OUT2
-diff $OUT1 $OUT2 > /dev/null
-ret=$?
-if [[ $ret != 0 ]]; then
-    echo "fail: showmap -a -t -f <smaps>";
-else
-    echo "pass: showmap -a -t -f <smaps>"
-fi
-
-showmap -a -t -v -f $SMAPS > $OUT1
-showmap2 -a -t -v -f $SMAPS > $OUT2
-diff $OUT1 $OUT2 > /dev/null
-ret=$?
-if [[ $ret != 0 ]]; then
-    echo "fail: showmap -a -t -v -f <smaps>";
-else
-    echo "pass: showmap -a -t -v -f <smaps>"
-fi
-
-# Note: This test again is expected to fail as the new
-# showmap fixes an issue with -t where the tool was only
-# showing maps with private dirty pages. The '-t' option was however
-# supposed to show all maps that have 'private' pages, clean or dirty.
-showmap -t -f $SMAPS > $OUT1
-showmap2 -t -f $SMAPS > $OUT2
-diff $OUT1 $OUT2 > /dev/null
-ret=$?
-if [[ $ret != 0 ]]; then
-    echo "fail: showmap -t -f <smaps>";
-else
-    echo "pass: showmap -t -f <smaps>"
-fi
-
-
diff --git a/libmeminfo/testdata1/smaps b/libmeminfo/testdata1/smaps
deleted file mode 100644
index 23aa2af..0000000
--- a/libmeminfo/testdata1/smaps
+++ /dev/null
@@ -1,56297 +0,0 @@
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diff --git a/libmeminfo/testdata1/smaps_short b/libmeminfo/testdata1/smaps_short
deleted file mode 100644
index cee67b3..0000000
--- a/libmeminfo/testdata1/smaps_short
+++ /dev/null
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diff --git a/libmeminfo/testdata1/vmallocinfo b/libmeminfo/testdata1/vmallocinfo
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--- a/libmeminfo/testdata1/vmallocinfo
+++ /dev/null
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diff --git a/libmeminfo/testdata2/mem_used_total b/libmeminfo/testdata2/mem_used_total
deleted file mode 100644
index 97fcf41..0000000
--- a/libmeminfo/testdata2/mem_used_total
+++ /dev/null
@@ -1 +0,0 @@
-31236096
diff --git a/libmeminfo/tools/Android.bp b/libmeminfo/tools/Android.bp
deleted file mode 100644
index 3968c09..0000000
--- a/libmeminfo/tools/Android.bp
+++ /dev/null
@@ -1,90 +0,0 @@
-// Copyright (C) 2018 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-cc_binary {
-    name: "librank",
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-
-    srcs: ["librank.cpp"],
-    shared_libs: [
-        "libbase",
-        "libmeminfo",
-    ],
-}
-
-cc_binary {
-    name: "procmem",
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-
-    srcs: ["procmem.cpp"],
-    shared_libs: [
-        "libbase",
-        "libmeminfo",
-    ],
-}
-
-cc_binary {
-    name: "procrank",
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-
-    srcs: ["procrank.cpp"],
-    shared_libs: [
-        "libbase",
-        "libmeminfo",
-    ],
-}
-
-cc_binary {
-    name: "showmap",
-    host_supported: true,
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-
-    srcs: ["showmap.cpp"],
-    shared_libs: [
-        "libbase",
-        "libmeminfo",
-    ],
-
-    target: {
-        darwin: {
-            enabled: false,
-        },
-    },
-}
-
-cc_binary {
-    name: "wsstop",
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-    srcs: ["wsstop.cpp"],
-    shared_libs: [
-        "libbase",
-        "liblog",
-        "libmeminfo",
-    ],
-}
diff --git a/libmeminfo/tools/librank.cpp b/libmeminfo/tools/librank.cpp
deleted file mode 100644
index e53c746..0000000
--- a/libmeminfo/tools/librank.cpp
+++ /dev/null
@@ -1,351 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <dirent.h>
-#include <errno.h>
-#include <error.h>
-#include <inttypes.h>
-#include <linux/kernel-page-flags.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <algorithm>
-#include <map>
-#include <memory>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/parseint.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-
-#include <meminfo/procmeminfo.h>
-
-using ::android::meminfo::MemUsage;
-using ::android::meminfo::ProcMemInfo;
-using ::android::meminfo::Vma;
-
-[[noreturn]] static void usage(int exit_status) {
-    fprintf(stderr,
-            "Usage: %s [ -P | -L ] [ -v | -r | -p | -u | -s | -h ]\n"
-            "\n"
-            "Sort options:\n"
-            "    -v  Sort processes by VSS.\n"
-            "    -r  Sort processes by RSS.\n"
-            "    -p  Sort processes by PSS.\n"
-            "    -u  Sort processes by USS.\n"
-            "    -s  Sort processes by swap.\n"
-            "        (Default sort order is PSS.)\n"
-            "    -a  Show all mappings, including stack, heap and anon.\n"
-            "    -P /path  Limit libraries displayed to those in path.\n"
-            "    -R  Reverse sort order (default is descending).\n"
-            "    -m [r][w][x] Only list pages that exactly match permissions\n"
-            "    -c  Only show cached (storage backed) pages\n"
-            "    -C  Only show non-cached (ram/swap backed) pages\n"
-            "    -k  Only show pages collapsed by KSM\n"
-            "    -h  Display this help screen.\n",
-            getprogname());
-    exit(exit_status);
-}
-
-static void add_mem_usage(MemUsage* to, const MemUsage& from) {
-    to->vss += from.vss;
-    to->rss += from.rss;
-    to->pss += from.pss;
-    to->uss += from.uss;
-
-    to->swap += from.swap;
-
-    to->private_clean += from.private_clean;
-    to->private_dirty += from.private_dirty;
-
-    to->shared_clean += from.shared_clean;
-    to->shared_dirty += from.shared_dirty;
-}
-
-struct ProcessRecord {
-  public:
-    ProcessRecord(pid_t pid) : pid_(-1), cmdline_("") {
-        std::string fname = ::android::base::StringPrintf("/proc/%d/cmdline", pid);
-        std::string cmdline;
-        if (!::android::base::ReadFileToString(fname, &cmdline)) {
-            fprintf(stderr, "Failed to read cmdline from: %s\n", fname.c_str());
-            return;
-        }
-        // We deliberately don't read the proc/<pid>cmdline file directly into 'cmdline_'
-        // because of some processes showing up cmdlines that end with "0x00 0x0A 0x00"
-        // e.g. xtra-daemon, lowi-server
-        // The .c_str() assignment below then takes care of trimming the cmdline at the first
-        // 0x00. This is how original procrank worked (luckily)
-        cmdline_ = cmdline.c_str();
-        pid_ = pid;
-        usage_.clear();
-    }
-
-    ~ProcessRecord() = default;
-
-    bool valid() const { return pid_ != -1; }
-
-    // Getters
-    pid_t pid() const { return pid_; }
-    const std::string& cmdline() const { return cmdline_; }
-    const MemUsage& usage() const { return usage_; }
-
-    // Add to the usage
-    void AddUsage(const MemUsage& mem_usage) { add_mem_usage(&usage_, mem_usage); }
-
-  private:
-    pid_t pid_;
-    std::string cmdline_;
-    MemUsage usage_;
-};
-
-struct LibRecord {
-  public:
-    LibRecord(const std::string& name) : name_(name) {}
-    ~LibRecord() = default;
-
-    const std::string& name() const { return name_; }
-    const MemUsage& usage() const { return usage_; }
-    const std::map<pid_t, ProcessRecord>& processes() const { return procs_; }
-    uint64_t pss() const { return usage_.pss; }
-    void AddUsage(const ProcessRecord& proc, const MemUsage& mem_usage) {
-        auto [it, inserted] = procs_.insert(std::pair<pid_t, ProcessRecord>(proc.pid(), proc));
-        it->second.AddUsage(mem_usage);
-        add_mem_usage(&usage_, mem_usage);
-    }
-
-  private:
-    std::string name_;
-    MemUsage usage_;
-    std::map<pid_t, ProcessRecord> procs_;
-};
-
-// List of every library / map
-static std::map<std::string, LibRecord> g_libs;
-
-// List of library/map names that we don't want to show by default
-static const std::vector<std::string> g_blacklisted_libs = {"[heap]", "[stack]"};
-
-// Global flags affected by command line
-static uint64_t g_pgflags = 0;
-static uint64_t g_pgflags_mask = 0;
-static uint16_t g_mapflags_mask = 0;
-static bool g_all_libs = false;
-static bool g_has_swap = false;
-static bool g_reverse_sort = false;
-static std::string g_prefix_filter = "";
-
-static bool read_all_pids(std::function<bool(pid_t pid)> for_each_pid) {
-    std::unique_ptr<DIR, int (*)(DIR*)> procdir(opendir("/proc"), closedir);
-    if (!procdir) return false;
-
-    struct dirent* dir;
-    pid_t pid;
-    while ((dir = readdir(procdir.get()))) {
-        if (!::android::base::ParseInt(dir->d_name, &pid)) continue;
-        if (!for_each_pid(pid)) return false;
-    }
-
-    return true;
-}
-
-static bool scan_libs_per_process(pid_t pid) {
-    ProcMemInfo pmem(pid, false, g_pgflags, g_pgflags_mask);
-    const std::vector<Vma> maps = pmem.Maps();
-    if (maps.size() == 0) {
-        // nothing to do here, continue
-        return true;
-    }
-
-    ProcessRecord proc(pid);
-    if (!proc.valid()) {
-        fprintf(stderr, "Failed to create process record for process: %d\n", pid);
-        return false;
-    }
-
-    for (auto& map : maps) {
-        // skip library / map if prefix for the path doesn't match
-        if (!g_prefix_filter.empty() && !::android::base::StartsWith(map.name, g_prefix_filter)) {
-            continue;
-        }
-        // Skip maps based on map permissions
-        if (g_mapflags_mask &&
-            ((map.flags & (PROT_READ | PROT_WRITE | PROT_EXEC)) != g_mapflags_mask)) {
-            continue;
-        }
-
-        // skip blacklisted library / map names
-        if (!g_all_libs && (std::find(g_blacklisted_libs.begin(), g_blacklisted_libs.end(),
-                                      map.name) != g_blacklisted_libs.end())) {
-            continue;
-        }
-
-        auto [it, inserted] =
-            g_libs.insert(std::pair<std::string, LibRecord>(map.name, LibRecord(map.name)));
-        it->second.AddUsage(proc, map.usage);
-
-        if (!g_has_swap && map.usage.swap) {
-            g_has_swap = true;
-        }
-    }
-
-    return true;
-}
-
-static uint16_t parse_mapflags(const char* mapflags) {
-    uint16_t ret = 0;
-    for (const char* p = mapflags; *p; p++) {
-        switch (*p) {
-            case 'r':
-                ret |= PROT_READ;
-                break;
-            case 'w':
-                ret |= PROT_WRITE;
-                break;
-            case 'x':
-                ret |= PROT_EXEC;
-                break;
-            default:
-                error(EXIT_FAILURE, 0, "Invalid permissions string: %s, %s", mapflags, p);
-        }
-    }
-
-    return ret;
-}
-
-int main(int argc, char* argv[]) {
-    int opt;
-
-    auto pss_sort = [](const ProcessRecord& a, const ProcessRecord& b) {
-        return g_reverse_sort ? a.usage().pss < b.usage().pss : a.usage().pss > b.usage().pss;
-    };
-
-    auto uss_sort = [](const ProcessRecord& a, const ProcessRecord& b) {
-        return g_reverse_sort ? a.usage().uss < b.usage().uss : a.usage().uss > b.usage().uss;
-    };
-
-    auto vss_sort = [](const ProcessRecord& a, const ProcessRecord& b) {
-        return g_reverse_sort ? a.usage().vss < b.usage().vss : a.usage().vss > b.usage().vss;
-    };
-
-    auto rss_sort = [](const ProcessRecord& a, const ProcessRecord& b) {
-        return g_reverse_sort ? a.usage().rss < b.usage().rss : a.usage().rss > b.usage().rss;
-    };
-
-    auto swap_sort = [](const ProcessRecord& a, const ProcessRecord& b) {
-        return g_reverse_sort ? a.usage().swap < b.usage().swap : a.usage().swap > b.usage().swap;
-    };
-
-    std::function<bool(const ProcessRecord&, const ProcessRecord&)> sort_func = pss_sort;
-
-    while ((opt = getopt(argc, argv, "acChkm:pP:uvrsR")) != -1) {
-        switch (opt) {
-            case 'a':
-                g_all_libs = true;
-                break;
-            case 'c':
-                g_pgflags = 0;
-                g_pgflags_mask = (1 << KPF_SWAPBACKED);
-                break;
-            case 'C':
-                g_pgflags = g_pgflags_mask = (1 << KPF_SWAPBACKED);
-                break;
-            case 'h':
-                usage(EXIT_SUCCESS);
-            case 'k':
-                g_pgflags = g_pgflags_mask = (1 << KPF_KSM);
-                break;
-            case 'm':
-                g_mapflags_mask = parse_mapflags(optarg);
-                break;
-            case 'p':
-                sort_func = pss_sort;
-                break;
-            case 'P':
-                g_prefix_filter = optarg;
-                break;
-            case 'u':
-                sort_func = uss_sort;
-                break;
-            case 'v':
-                sort_func = vss_sort;
-                break;
-            case 'r':
-                sort_func = rss_sort;
-                break;
-            case 's':
-                sort_func = swap_sort;
-                break;
-            case 'R':
-                g_reverse_sort = true;
-                break;
-            default:
-                usage(EXIT_FAILURE);
-        }
-    }
-
-    if (!read_all_pids(scan_libs_per_process)) {
-        error(EXIT_FAILURE, 0, "Failed to read all pids from the system");
-    }
-
-    printf(" %6s   %7s   %6s   %6s   %6s  ", "RSStot", "VSS", "RSS", "PSS", "USS");
-    if (g_has_swap) {
-        printf(" %6s  ", "Swap");
-    }
-    printf("Name/PID\n");
-
-    std::vector<LibRecord> v_libs;
-    v_libs.reserve(g_libs.size());
-    std::transform(g_libs.begin(), g_libs.end(), std::back_inserter(v_libs),
-        [] (std::pair<std::string, LibRecord> const& pair) { return pair.second; });
-
-    // sort the libraries by their pss
-    std::sort(v_libs.begin(), v_libs.end(),
-              [](const LibRecord& l1, const LibRecord& l2) { return l1.pss() > l2.pss(); });
-
-    for (auto& lib : v_libs) {
-        printf("%6" PRIu64 "K   %7s   %6s   %6s   %6s  ", lib.pss() / 1024, "", "", "", "");
-        if (g_has_swap) {
-            printf(" %6s  ", "");
-        }
-        printf("%s\n", lib.name().c_str());
-
-        // sort all mappings first
-
-        std::vector<ProcessRecord> procs;
-        procs.reserve(lib.processes().size());
-        std::transform(lib.processes().begin(), lib.processes().end(), std::back_inserter(procs),
-            [] (std::pair<pid_t, ProcessRecord> const& pair) { return pair.second; });
-
-        std::sort(procs.begin(), procs.end(), sort_func);
-
-        for (auto& p : procs) {
-            const MemUsage& usage = p.usage();
-            printf(" %6s  %7" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64 "K  ", "",
-                   usage.vss / 1024, usage.rss / 1024, usage.pss / 1024, usage.uss / 1024);
-            if (g_has_swap) {
-                printf("%6" PRIu64 "K  ", usage.swap / 1024);
-            }
-            printf("  %s [%d]\n", p.cmdline().c_str(), p.pid());
-        }
-    }
-
-    return 0;
-}
diff --git a/libmeminfo/tools/procmem.cpp b/libmeminfo/tools/procmem.cpp
deleted file mode 100644
index 47881ed..0000000
--- a/libmeminfo/tools/procmem.cpp
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <inttypes.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include <iostream>
-#include <sstream>
-#include <string>
-#include <vector>
-
-#include <android-base/stringprintf.h>
-#include <meminfo/procmeminfo.h>
-
-using Vma = ::android::meminfo::Vma;
-using ProcMemInfo = ::android::meminfo::ProcMemInfo;
-using MemUsage = ::android::meminfo::MemUsage;
-
-// Global flags to control procmem output
-
-// Set to use page idle bits for working set detection
-bool use_pageidle = false;
-// hides map entries with zero rss
-bool hide_zeroes = false;
-// Reset working set and exit
-bool reset_wss = false;
-// Show working set, mutually exclusive with reset_wss;
-bool show_wss = false;
-
-[[noreturn]] static void usage(int exit_status) {
-    fprintf(stderr,
-            "Usage: %s [-i] [ -w | -W ] [ -p | -m ] [ -h ] pid\n"
-            "    -i  Uses idle page tracking for working set statistics.\n"
-            "    -w  Displays statistics for the working set only.\n"
-            "    -W  Resets the working set of the process.\n"
-            "    -p  Sort by PSS.\n"
-            "    -u  Sort by USS.\n"
-            "    -m  Sort by mapping order (as read from /proc).\n"
-            "    -h  Hide maps with no RSS.\n",
-            getprogname());
-
-    exit(exit_status);
-}
-
-static void print_separator(std::stringstream& ss) {
-    if (show_wss) {
-        ss << ::android::base::StringPrintf("%7s  %7s  %7s  %7s  %7s  %7s  %7s  %s\n", "-------",
-                                            "-------", "-------", "-------", "-------", "-------",
-                                            "-------", "");
-        return;
-    }
-    ss << ::android::base::StringPrintf("%7s  %7s  %7s  %7s  %7s  %7s  %7s  %7s  %s\n", "-------",
-                                        "-------", "-------", "-------", "-------", "-------",
-                                        "-------", "-------", "");
-}
-
-static void print_header(std::stringstream& ss) {
-    if (show_wss) {
-        ss << ::android::base::StringPrintf("%7s  %7s  %7s  %7s  %7s  %7s  %7s  %s\n", "WRss",
-                                            "WPss", "WUss", "WShCl", "WShDi", "WPrCl", "WPrDi",
-                                            "Name");
-    } else {
-        ss << ::android::base::StringPrintf("%7s  %7s  %7s  %7s  %7s  %7s  %7s  %7s  %s\n", "Vss",
-                                            "Rss", "Pss", "Uss", "ShCl", "ShDi", "PrCl", "PrDi",
-                                            "Name");
-    }
-    print_separator(ss);
-}
-
-static void print_stats(std::stringstream& ss, const MemUsage& stats) {
-    if (!show_wss) {
-        ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", stats.vss / 1024);
-    }
-
-    ss << ::android::base::StringPrintf("%6" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64
-                                        "K  %6" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64 "K  ",
-                                        stats.rss / 1024, stats.pss / 1024, stats.uss / 1024,
-                                        stats.shared_clean / 1024, stats.shared_dirty / 1024,
-                                        stats.private_clean / 1024, stats.private_dirty / 1024);
-}
-
-static int show(const MemUsage& proc_stats, const std::vector<Vma>& maps) {
-    std::stringstream ss;
-    print_header(ss);
-    for (auto& vma : maps) {
-        const MemUsage& vma_stats = vma.usage;
-        if (hide_zeroes && vma_stats.rss == 0) {
-            continue;
-        }
-        print_stats(ss, vma_stats);
-        ss << vma.name << std::endl;
-    }
-    print_separator(ss);
-    print_stats(ss, proc_stats);
-    ss << "TOTAL" << std::endl;
-    std::cout << ss.str();
-
-    return 0;
-}
-
-int main(int argc, char* argv[]) {
-    int opt;
-    auto pss_sort = [](const Vma& a, const Vma& b) {
-        uint64_t pss_a = a.usage.pss;
-        uint64_t pss_b = b.usage.pss;
-        return pss_a > pss_b;
-    };
-
-    auto uss_sort = [](const Vma& a, const Vma& b) {
-        uint64_t uss_a = a.usage.uss;
-        uint64_t uss_b = b.usage.uss;
-        return uss_a > uss_b;
-    };
-
-    std::function<bool(const Vma& a, const Vma& b)> sort_func = nullptr;
-    while ((opt = getopt(argc, argv, "himpuWw")) != -1) {
-        switch (opt) {
-            case 'h':
-                hide_zeroes = true;
-                break;
-            case 'i':
-                // TODO: libmeminfo doesn't support the flag to chose
-                // between idle page tracking vs clear_refs. So for now,
-                // this flag is unused and the library defaults to using
-                // /proc/<pid>/clear_refs for finding the working set.
-                use_pageidle = true;
-                break;
-            case 'm':
-                // this is the default
-                break;
-            case 'p':
-                sort_func = pss_sort;
-                break;
-            case 'u':
-                sort_func = uss_sort;
-                break;
-            case 'W':
-                reset_wss = true;
-                break;
-            case 'w':
-                show_wss = true;
-                break;
-            case '?':
-                usage(EXIT_SUCCESS);
-            default:
-                usage(EXIT_FAILURE);
-        }
-    }
-
-    if (optind != (argc - 1)) {
-        fprintf(stderr, "Need exactly one pid at the end\n");
-        usage(EXIT_FAILURE);
-    }
-
-    pid_t pid = atoi(argv[optind]);
-    if (pid == 0) {
-        std::cerr << "Invalid process id" << std::endl;
-        exit(EXIT_FAILURE);
-    }
-
-    if (reset_wss) {
-        if (!ProcMemInfo::ResetWorkingSet(pid)) {
-            std::cerr << "Failed to reset working set of pid : " << pid << std::endl;
-            exit(EXIT_FAILURE);
-        }
-        return 0;
-    }
-
-    ProcMemInfo proc(pid, show_wss);
-    const MemUsage& proc_stats = proc.Usage();
-    std::vector<Vma> maps(proc.Maps());
-    if (sort_func != nullptr) {
-        std::sort(maps.begin(), maps.end(), sort_func);
-    }
-
-    return show(proc_stats, maps);
-}
diff --git a/libmeminfo/tools/procrank.cpp b/libmeminfo/tools/procrank.cpp
deleted file mode 100644
index 1e44ff9..0000000
--- a/libmeminfo/tools/procrank.cpp
+++ /dev/null
@@ -1,536 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <android-base/file.h>
-#include <android-base/parseint.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-#include <dirent.h>
-#include <errno.h>
-#include <inttypes.h>
-#include <linux/kernel-page-flags.h>
-#include <linux/oom.h>
-#include <meminfo/procmeminfo.h>
-#include <meminfo/sysmeminfo.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <iostream>
-#include <memory>
-#include <sstream>
-#include <vector>
-
-using ::android::meminfo::MemUsage;
-using ::android::meminfo::ProcMemInfo;
-
-struct ProcessRecord {
-  public:
-    ProcessRecord(pid_t pid, bool get_wss = false, uint64_t pgflags = 0, uint64_t pgflags_mask = 0)
-        : pid_(-1),
-          oomadj_(OOM_SCORE_ADJ_MAX + 1),
-          cmdline_(""),
-          proportional_swap_(0),
-          unique_swap_(0),
-          zswap_(0) {
-        std::unique_ptr<ProcMemInfo> procmem =
-                std::make_unique<ProcMemInfo>(pid, get_wss, pgflags, pgflags_mask);
-        if (procmem == nullptr) {
-            std::cerr << "Failed to create ProcMemInfo for: " << pid << std::endl;
-            return;
-        }
-
-        std::string fname = ::android::base::StringPrintf("/proc/%d/oom_score_adj", pid);
-        auto oomscore_fp =
-                std::unique_ptr<FILE, decltype(&fclose)>{fopen(fname.c_str(), "re"), fclose};
-        if (oomscore_fp == nullptr) {
-            std::cerr << "Failed to open oom_score_adj file: " << fname << std::endl;
-            return;
-        }
-
-        if (fscanf(oomscore_fp.get(), "%d\n", &oomadj_) != 1) {
-            std::cerr << "Failed to read oomadj from: " << fname << std::endl;
-            return;
-        }
-
-        fname = ::android::base::StringPrintf("/proc/%d/cmdline", pid);
-        if (!::android::base::ReadFileToString(fname, &cmdline_)) {
-            std::cerr << "Failed to read cmdline from: " << fname << std::endl;
-            cmdline_ = "<unknown>";
-        }
-        // We deliberately don't read the proc/<pid>cmdline file directly into 'cmdline_'
-        // because of some processes showing up cmdlines that end with "0x00 0x0A 0x00"
-        // e.g. xtra-daemon, lowi-server
-        // The .c_str() assignment below then takes care of trimming the cmdline at the first
-        // 0x00. This is how original procrank worked (luckily)
-        cmdline_.resize(strlen(cmdline_.c_str()));
-        usage_or_wss_ = get_wss ? procmem->Wss() : procmem->Usage();
-        swap_offsets_ = procmem->SwapOffsets();
-        pid_ = pid;
-    }
-
-    bool valid() const { return pid_ != -1; }
-
-    void CalculateSwap(const uint16_t* swap_offset_array, float zram_compression_ratio) {
-        for (auto& off : swap_offsets_) {
-            proportional_swap_ += getpagesize() / swap_offset_array[off];
-            unique_swap_ += swap_offset_array[off] == 1 ? getpagesize() : 0;
-            zswap_ = proportional_swap_ * zram_compression_ratio;
-        }
-    }
-
-    // Getters
-    pid_t pid() const { return pid_; }
-    const std::string& cmdline() const { return cmdline_; }
-    int32_t oomadj() const { return oomadj_; }
-    uint64_t proportional_swap() const { return proportional_swap_; }
-    uint64_t unique_swap() const { return unique_swap_; }
-    uint64_t zswap() const { return zswap_; }
-
-    // Wrappers to ProcMemInfo
-    const std::vector<uint16_t>& SwapOffsets() const { return swap_offsets_; }
-    const MemUsage& Usage() const { return usage_or_wss_; }
-    const MemUsage& Wss() const { return usage_or_wss_; }
-
-  private:
-    pid_t pid_;
-    int32_t oomadj_;
-    std::string cmdline_;
-    uint64_t proportional_swap_;
-    uint64_t unique_swap_;
-    uint64_t zswap_;
-    MemUsage usage_or_wss_;
-    std::vector<uint16_t> swap_offsets_;
-};
-
-// Show working set instead of memory consumption
-bool show_wss = false;
-// Reset working set of each process
-bool reset_wss = false;
-// Show per-process oom_score_adj column
-bool show_oomadj = false;
-// True if the device has swap enabled
-bool has_swap = false;
-// True, if device has zram enabled
-bool has_zram = false;
-// If zram is enabled, the compression ratio is zram used / swap used.
-float zram_compression_ratio = 0.0;
-// Sort process in reverse, default is descending
-bool reverse_sort = false;
-
-// Calculated total memory usage across all processes in the system
-uint64_t total_pss = 0;
-uint64_t total_uss = 0;
-uint64_t total_swap = 0;
-uint64_t total_pswap = 0;
-uint64_t total_uswap = 0;
-uint64_t total_zswap = 0;
-
-[[noreturn]] static void usage(int exit_status) {
-    std::cerr << "Usage: " << getprogname() << " [ -W ] [ -v | -r | -p | -u | -s | -h ]"
-              << std::endl
-              << "    -v  Sort by VSS." << std::endl
-              << "    -r  Sort by RSS." << std::endl
-              << "    -p  Sort by PSS." << std::endl
-              << "    -u  Sort by USS." << std::endl
-              << "    -s  Sort by swap." << std::endl
-              << "        (Default sort order is PSS.)" << std::endl
-              << "    -R  Reverse sort order (default is descending)." << std::endl
-              << "    -c  Only show cached (storage backed) pages" << std::endl
-              << "    -C  Only show non-cached (ram/swap backed) pages" << std::endl
-              << "    -k  Only show pages collapsed by KSM" << std::endl
-              << "    -w  Display statistics for working set only." << std::endl
-              << "    -W  Reset working set of all processes." << std::endl
-              << "    -o  Show and sort by oom score against lowmemorykiller thresholds."
-              << std::endl
-              << "    -h  Display this help screen." << std::endl;
-    exit(exit_status);
-}
-
-static bool read_all_pids(std::vector<pid_t>* pids, std::function<bool(pid_t pid)> for_each_pid) {
-    pids->clear();
-    std::unique_ptr<DIR, int (*)(DIR*)> procdir(opendir("/proc"), closedir);
-    if (!procdir) return false;
-
-    struct dirent* dir;
-    pid_t pid;
-    while ((dir = readdir(procdir.get()))) {
-        if (!::android::base::ParseInt(dir->d_name, &pid)) continue;
-        if (!for_each_pid(pid)) return false;
-        pids->emplace_back(pid);
-    }
-
-    return true;
-}
-
-static bool count_swap_offsets(const ProcessRecord& proc, uint16_t* swap_offset_array,
-                               uint32_t size) {
-    const std::vector<uint16_t>& swp_offs = proc.SwapOffsets();
-    for (auto& off : swp_offs) {
-        if (off >= size) {
-            std::cerr << "swap offset " << off << " is out of bounds for process: " << proc.pid()
-                      << std::endl;
-            return false;
-        }
-
-        if (swap_offset_array[off] == USHRT_MAX) {
-            std::cerr << "swap offset " << off << " ref count overflow in process: " << proc.pid()
-                      << std::endl;
-            return false;
-        }
-
-        swap_offset_array[off]++;
-    }
-
-    return true;
-}
-
-static void print_header(std::stringstream& ss) {
-    ss.str("");
-    ss << ::android::base::StringPrintf("%5s  ", "PID");
-    if (show_oomadj) {
-        ss << ::android::base::StringPrintf("%5s  ", "oom");
-    }
-
-    if (show_wss) {
-        ss << ::android::base::StringPrintf("%7s  %7s  %7s  ", "WRss", "WPss", "WUss");
-        // now swap statistics here, working set pages by definition shouldn't end up in swap.
-    } else {
-        ss << ::android::base::StringPrintf("%8s  %7s  %7s  %7s  ", "Vss", "Rss", "Pss", "Uss");
-        if (has_swap) {
-            ss << ::android::base::StringPrintf("%7s  %7s  %7s  ", "Swap", "PSwap", "USwap");
-            if (has_zram) {
-                ss << ::android::base::StringPrintf("%7s  ", "ZSwap");
-            }
-        }
-    }
-
-    ss << "cmdline";
-}
-
-static void print_process_record(std::stringstream& ss, ProcessRecord& proc) {
-    ss << ::android::base::StringPrintf("%5d  ", proc.pid());
-    if (show_oomadj) {
-        ss << ::android::base::StringPrintf("%5d  ", proc.oomadj());
-    }
-
-    if (show_wss) {
-        ss << ::android::base::StringPrintf("%6" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64 "K  ",
-                                            proc.Wss().rss / 1024, proc.Wss().pss / 1024,
-                                            proc.Wss().uss / 1024);
-    } else {
-        ss << ::android::base::StringPrintf("%7" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64
-                                            "K  ",
-                                            proc.Usage().vss / 1024, proc.Usage().rss / 1024,
-                                            proc.Usage().pss / 1024, proc.Usage().uss / 1024);
-        if (has_swap) {
-            ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", proc.Usage().swap / 1024);
-            ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", proc.proportional_swap() / 1024);
-            ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", proc.unique_swap() / 1024);
-            if (has_zram) {
-                ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", (proc.zswap() / 1024));
-            }
-        }
-    }
-}
-
-static void print_processes(std::stringstream& ss, std::vector<ProcessRecord>& procs,
-                            uint16_t* swap_offset_array) {
-    for (auto& proc : procs) {
-        total_pss += show_wss ? proc.Wss().pss : proc.Usage().pss;
-        total_uss += show_wss ? proc.Wss().uss : proc.Usage().uss;
-        if (!show_wss && has_swap) {
-            proc.CalculateSwap(swap_offset_array, zram_compression_ratio);
-            total_swap += proc.Usage().swap;
-            total_pswap += proc.proportional_swap();
-            total_uswap += proc.unique_swap();
-            if (has_zram) {
-                total_zswap += proc.zswap();
-            }
-        }
-
-        print_process_record(ss, proc);
-        ss << proc.cmdline() << std::endl;
-    }
-}
-
-static void print_separator(std::stringstream& ss) {
-    ss << ::android::base::StringPrintf("%5s  ", "");
-    if (show_oomadj) {
-        ss << ::android::base::StringPrintf("%5s  ", "");
-    }
-
-    if (show_wss) {
-        ss << ::android::base::StringPrintf("%7s  %7s  %7s  ", "", "------", "------");
-    } else {
-        ss << ::android::base::StringPrintf("%8s  %7s  %7s  %7s  ", "", "", "------", "------");
-        if (has_swap) {
-            ss << ::android::base::StringPrintf("%7s  %7s  %7s  ", "------", "------", "------");
-            if (has_zram) {
-                ss << ::android::base::StringPrintf("%7s  ", "------");
-            }
-        }
-    }
-
-    ss << ::android::base::StringPrintf("%s", "------");
-}
-
-static void print_totals(std::stringstream& ss) {
-    ss << ::android::base::StringPrintf("%5s  ", "");
-    if (show_oomadj) {
-        ss << ::android::base::StringPrintf("%5s  ", "");
-    }
-
-    if (show_wss) {
-        ss << ::android::base::StringPrintf("%7s  %6" PRIu64 "K  %6" PRIu64 "K  ", "",
-                                            total_pss / 1024, total_uss / 1024);
-    } else {
-        ss << ::android::base::StringPrintf("%8s  %7s  %6" PRIu64 "K  %6" PRIu64 "K  ", "", "",
-                                            total_pss / 1024, total_uss / 1024);
-        if (has_swap) {
-            ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", total_swap / 1024);
-            ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", total_pswap / 1024);
-            ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", total_uswap / 1024);
-            if (has_zram) {
-                ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", total_zswap / 1024);
-            }
-        }
-    }
-    ss << "TOTAL";
-}
-
-static void print_sysmeminfo(std::stringstream& ss, ::android::meminfo::SysMemInfo& smi) {
-    if (has_swap) {
-        ss << ::android::base::StringPrintf("ZRAM: %" PRIu64 "K physical used for %" PRIu64
-                                            "K in swap "
-                                            "(%" PRIu64 "K total swap)",
-                                            smi.mem_zram_kb(),
-                                            (smi.mem_swap_kb() - smi.mem_swap_free_kb()),
-                                            smi.mem_swap_kb())
-           << std::endl;
-    }
-
-    ss << ::android::base::StringPrintf(" RAM: %" PRIu64 "K total, %" PRIu64 "K free, %" PRIu64
-                                        "K buffers, "
-                                        "%" PRIu64 "K cached, %" PRIu64 "K shmem, %" PRIu64
-                                        "K slab",
-                                        smi.mem_total_kb(), smi.mem_free_kb(), smi.mem_buffers_kb(),
-                                        smi.mem_cached_kb(), smi.mem_shmem_kb(), smi.mem_slab_kb());
-}
-
-int main(int argc, char* argv[]) {
-    auto pss_sort = [](ProcessRecord& a, ProcessRecord& b) {
-        MemUsage stats_a = show_wss ? a.Wss() : a.Usage();
-        MemUsage stats_b = show_wss ? b.Wss() : b.Usage();
-        return reverse_sort ? stats_a.pss < stats_b.pss : stats_a.pss > stats_b.pss;
-    };
-
-    auto uss_sort = [](ProcessRecord& a, ProcessRecord& b) {
-        MemUsage stats_a = show_wss ? a.Wss() : a.Usage();
-        MemUsage stats_b = show_wss ? b.Wss() : b.Usage();
-        return reverse_sort ? stats_a.uss < stats_b.uss : stats_a.uss > stats_b.uss;
-    };
-
-    auto rss_sort = [](ProcessRecord& a, ProcessRecord& b) {
-        MemUsage stats_a = show_wss ? a.Wss() : a.Usage();
-        MemUsage stats_b = show_wss ? b.Wss() : b.Usage();
-        return reverse_sort ? stats_a.rss < stats_b.rss : stats_a.rss > stats_b.rss;
-    };
-
-    auto vss_sort = [](ProcessRecord& a, ProcessRecord& b) {
-        MemUsage stats_a = show_wss ? a.Wss() : a.Usage();
-        MemUsage stats_b = show_wss ? b.Wss() : b.Usage();
-        return reverse_sort ? stats_a.vss < stats_b.vss : stats_a.vss > stats_b.vss;
-    };
-
-    auto swap_sort = [](ProcessRecord& a, ProcessRecord& b) {
-        MemUsage stats_a = show_wss ? a.Wss() : a.Usage();
-        MemUsage stats_b = show_wss ? b.Wss() : b.Usage();
-        return reverse_sort ? stats_a.swap < stats_b.swap : stats_a.swap > stats_b.swap;
-    };
-
-    auto oomadj_sort = [](ProcessRecord& a, ProcessRecord& b) {
-        return reverse_sort ? a.oomadj() < b.oomadj() : a.oomadj() > b.oomadj();
-    };
-
-    // default PSS sort
-    std::function<bool(ProcessRecord & a, ProcessRecord & b)> proc_sort = pss_sort;
-
-    // count all pages by default
-    uint64_t pgflags = 0;
-    uint64_t pgflags_mask = 0;
-
-    int opt;
-    while ((opt = getopt(argc, argv, "cChkoprRsuvwW")) != -1) {
-        switch (opt) {
-            case 'c':
-                pgflags = 0;
-                pgflags_mask = (1 << KPF_SWAPBACKED);
-                break;
-            case 'C':
-                pgflags = (1 << KPF_SWAPBACKED);
-                pgflags_mask = (1 << KPF_SWAPBACKED);
-                break;
-            case 'h':
-                usage(EXIT_SUCCESS);
-            case 'k':
-                pgflags = (1 << KPF_KSM);
-                pgflags_mask = (1 << KPF_KSM);
-                break;
-            case 'o':
-                proc_sort = oomadj_sort;
-                show_oomadj = true;
-                break;
-            case 'p':
-                proc_sort = pss_sort;
-                break;
-            case 'r':
-                proc_sort = rss_sort;
-                break;
-            case 'R':
-                reverse_sort = true;
-                break;
-            case 's':
-                proc_sort = swap_sort;
-                break;
-            case 'u':
-                proc_sort = uss_sort;
-                break;
-            case 'v':
-                proc_sort = vss_sort;
-                break;
-            case 'w':
-                show_wss = true;
-                break;
-            case 'W':
-                reset_wss = true;
-                break;
-            default:
-                usage(EXIT_FAILURE);
-        }
-    }
-
-    std::vector<pid_t> pids;
-    std::vector<ProcessRecord> procs;
-    if (reset_wss) {
-        if (!read_all_pids(&pids,
-                           [&](pid_t pid) -> bool { return ProcMemInfo::ResetWorkingSet(pid); })) {
-            std::cerr << "Failed to reset working set of all processes" << std::endl;
-            exit(EXIT_FAILURE);
-        }
-        // we are done, all other options passed to procrank are ignored in the presence of '-W'
-        return 0;
-    }
-
-    ::android::meminfo::SysMemInfo smi;
-    if (!smi.ReadMemInfo()) {
-        std::cerr << "Failed to get system memory info" << std::endl;
-        exit(EXIT_FAILURE);
-    }
-
-    // Figure out swap and zram
-    uint64_t swap_total = smi.mem_swap_kb() * 1024;
-    has_swap = swap_total > 0;
-    // Allocate the swap array
-    auto swap_offset_array = std::make_unique<uint16_t[]>(swap_total / getpagesize());
-    if (has_swap) {
-        has_zram = smi.mem_zram_kb() > 0;
-        if (has_zram) {
-            zram_compression_ratio = static_cast<float>(smi.mem_zram_kb()) /
-                                     (smi.mem_swap_kb() - smi.mem_swap_free_kb());
-        }
-    }
-
-    auto mark_swap_usage = [&](pid_t pid) -> bool {
-        ProcessRecord proc(pid, show_wss, pgflags, pgflags_mask);
-        if (!proc.valid()) {
-            // Check to see if the process is still around, skip the process if the proc
-            // directory is inaccessible. It was most likely killed while creating the process
-            // record
-            std::string procdir = ::android::base::StringPrintf("/proc/%d", pid);
-            if (access(procdir.c_str(), F_OK | R_OK)) return true;
-
-            // Warn if we failed to gather process stats even while it is still alive.
-            // Return success here, so we continue to print stats for other processes.
-            std::cerr << "warning: failed to create process record for: " << pid << std::endl;
-            return true;
-        }
-
-        // Skip processes with no memory mappings
-        uint64_t vss = show_wss ? proc.Wss().vss : proc.Usage().vss;
-        if (vss == 0) return true;
-
-        // collect swap_offset counts from all processes in 1st pass
-        if (!show_wss && has_swap &&
-            !count_swap_offsets(proc, swap_offset_array.get(), swap_total / getpagesize())) {
-            std::cerr << "Failed to count swap offsets for process: " << pid << std::endl;
-            return false;
-        }
-
-        procs.emplace_back(std::move(proc));
-        return true;
-    };
-
-    // Get a list of all pids currently running in the system in 1st pass through all processes.
-    // Mark each swap offset used by the process as we find them for calculating proportional
-    // swap usage later.
-    if (!read_all_pids(&pids, mark_swap_usage)) {
-        std::cerr << "Failed to read all pids from the system" << std::endl;
-        exit(EXIT_FAILURE);
-    }
-
-    std::stringstream ss;
-    if (procs.empty()) {
-        // This would happen in corner cases where procrank is being run to find KSM usage on a
-        // system with no KSM and combined with working set determination as follows
-        //   procrank -w -u -k
-        //   procrank -w -s -k
-        //   procrank -w -o -k
-        ss << "<empty>" << std::endl << std::endl;
-        print_sysmeminfo(ss, smi);
-        ss << std::endl;
-        std::cout << ss.str();
-        return 0;
-    }
-
-    // Sort all process records, default is PSS descending
-    std::sort(procs.begin(), procs.end(), proc_sort);
-
-    // start dumping output in string stream
-    print_header(ss);
-    ss << std::endl;
-
-    // 2nd pass to calculate and get per process stats to add them up
-    print_processes(ss, procs, swap_offset_array.get());
-
-    // Add separator to output
-    print_separator(ss);
-    ss << std::endl;
-
-    // Add totals to output
-    print_totals(ss);
-    ss << std::endl << std::endl;
-
-    // Add system information at the end
-    print_sysmeminfo(ss, smi);
-    ss << std::endl;
-
-    // dump on the screen
-    std::cout << ss.str();
-
-    return 0;
-}
diff --git a/libmeminfo/tools/showmap.cpp b/libmeminfo/tools/showmap.cpp
deleted file mode 100644
index 8ea2108..0000000
--- a/libmeminfo/tools/showmap.cpp
+++ /dev/null
@@ -1,266 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <getopt.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/signal.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <memory>
-#include <string>
-#include <vector>
-
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-#include <meminfo/procmeminfo.h>
-
-using ::android::meminfo::Vma;
-
-struct VmaInfo {
-    Vma vma;
-    bool is_bss;
-    uint32_t count;
-
-    VmaInfo() = default;
-    VmaInfo(const Vma& v) : vma(v), is_bss(false), count(1) {}
-    VmaInfo(const Vma& v, bool bss) : vma(v), is_bss(bss), count(1) {}
-    VmaInfo(const Vma& v, const std::string& name, bool bss) : vma(v), is_bss(bss), count(1) {
-        vma.name = name;
-    }
-};
-
-// Global options
-static std::string g_filename = "";
-static bool g_merge_by_names = false;
-static bool g_terse = false;
-static bool g_verbose = false;
-static bool g_show_addr = false;
-static bool g_quiet = false;
-static pid_t g_pid = -1;
-
-static VmaInfo g_total;
-static std::vector<VmaInfo> g_vmas;
-
-[[noreturn]] static void usage(const char* progname, int exit_status) {
-    fprintf(stderr,
-            "%s [-aqtv] [-f FILE] PID\n"
-            "-a\taddresses (show virtual memory map)\n"
-            "-q\tquiet (don't show error if map could not be read)\n"
-            "-t\tterse (show only items with private pages)\n"
-            "-v\tverbose (don't coalesce maps with the same name)\n"
-            "-f\tFILE (read from input from FILE instead of PID)\n",
-            progname);
-
-    exit(exit_status);
-}
-
-static bool is_library(const std::string& name) {
-    return (name.size() > 4) && (name[0] == '/') && ::android::base::EndsWith(name, ".so");
-}
-
-static bool insert_before(const VmaInfo& a, const VmaInfo& b) {
-    if (g_show_addr) {
-        return (a.vma.start < b.vma.start || (a.vma.start == b.vma.start && a.vma.end < b.vma.end));
-    }
-
-    return strcmp(a.vma.name.c_str(), b.vma.name.c_str()) < 0;
-}
-
-static void collect_vma(const Vma& vma) {
-    if (g_vmas.empty()) {
-        g_vmas.emplace_back(vma);
-        return;
-    }
-
-    VmaInfo current(vma);
-    VmaInfo& last = g_vmas.back();
-    // determine if this is bss;
-    if (vma.name.empty()) {
-        if (last.vma.end == current.vma.start && is_library(last.vma.name)) {
-            current.vma.name = last.vma.name;
-            current.is_bss = true;
-        } else {
-            current.vma.name = "[anon]";
-        }
-    }
-
-    std::vector<VmaInfo>::iterator it;
-    for (it = g_vmas.begin(); it != g_vmas.end(); it++) {
-        if (g_merge_by_names && (it->vma.name == current.vma.name)) {
-            it->vma.usage.vss += current.vma.usage.vss;
-            it->vma.usage.rss += current.vma.usage.rss;
-            it->vma.usage.pss += current.vma.usage.pss;
-
-            it->vma.usage.shared_clean += current.vma.usage.shared_clean;
-            it->vma.usage.shared_dirty += current.vma.usage.shared_dirty;
-            it->vma.usage.private_clean += current.vma.usage.private_clean;
-            it->vma.usage.private_dirty += current.vma.usage.private_dirty;
-            it->vma.usage.swap += current.vma.usage.swap;
-            it->vma.usage.swap_pss += current.vma.usage.swap_pss;
-            it->is_bss &= current.is_bss;
-            it->count++;
-            break;
-        }
-
-        if (insert_before(current, *it)) {
-            g_vmas.insert(it, current);
-            break;
-        }
-    }
-
-    if (it == g_vmas.end()) {
-        g_vmas.emplace_back(current);
-    }
-}
-
-static void print_header() {
-    const char* addr1 = g_show_addr ? "           start              end " : "";
-    const char* addr2 = g_show_addr ? "            addr             addr " : "";
-
-    printf("%s virtual                     shared   shared  private  private\n", addr1);
-    printf("%s    size      RSS      PSS    clean    dirty    clean    dirty     swap  swapPSS",
-           addr2);
-    if (!g_verbose && !g_show_addr) {
-        printf("   # ");
-    }
-    printf(" object\n");
-}
-
-static void print_divider() {
-    if (g_show_addr) {
-        printf("-------- -------- ");
-    }
-    printf("-------- -------- -------- -------- -------- -------- -------- -------- -------- ");
-    if (!g_verbose && !g_show_addr) {
-        printf("---- ");
-    }
-    printf("------------------------------\n");
-}
-
-static void print_vmainfo(const VmaInfo& v, bool total) {
-    if (g_show_addr) {
-        if (total) {
-            printf("                                  ");
-        } else {
-            printf("%16" PRIx64 " %16" PRIx64 " ", v.vma.start, v.vma.end);
-        }
-    }
-    printf("%8" PRIu64 " %8" PRIu64 " %8" PRIu64 " %8" PRIu64 " %8" PRIu64 " %8" PRIu64 " %8" PRIu64
-           " %8" PRIu64 " %8" PRIu64 " ",
-           v.vma.usage.vss, v.vma.usage.rss, v.vma.usage.pss, v.vma.usage.shared_clean,
-           v.vma.usage.shared_dirty, v.vma.usage.private_clean, v.vma.usage.private_dirty,
-           v.vma.usage.swap, v.vma.usage.swap_pss);
-    if (!g_verbose && !g_show_addr) {
-        printf("%4" PRIu32 " ", v.count);
-    }
-}
-
-static int showmap(void) {
-    if (!::android::meminfo::ForEachVmaFromFile(g_filename, collect_vma)) {
-        if (!g_quiet) {
-            fprintf(stderr, "Failed to parse file %s\n", g_filename.c_str());
-        }
-        return 1;
-    }
-
-    print_header();
-    print_divider();
-
-    for (const auto& v : g_vmas) {
-        g_total.vma.usage.vss += v.vma.usage.vss;
-        g_total.vma.usage.rss += v.vma.usage.rss;
-        g_total.vma.usage.pss += v.vma.usage.pss;
-
-        g_total.vma.usage.private_clean += v.vma.usage.private_clean;
-        g_total.vma.usage.private_dirty += v.vma.usage.private_dirty;
-        g_total.vma.usage.shared_clean += v.vma.usage.shared_clean;
-        g_total.vma.usage.shared_dirty += v.vma.usage.shared_dirty;
-
-        g_total.vma.usage.swap += v.vma.usage.swap;
-        g_total.vma.usage.swap_pss += v.vma.usage.swap_pss;
-        g_total.count += v.count;
-
-        if (g_terse && !(v.vma.usage.private_dirty || v.vma.usage.private_clean)) {
-            continue;
-        }
-
-        print_vmainfo(v, false);
-        printf("%s%s\n", v.vma.name.c_str(), v.is_bss ? " [bss]" : "");
-    }
-
-    print_divider();
-    print_header();
-    print_divider();
-
-    print_vmainfo(g_total, true);
-    printf("TOTAL\n");
-
-    return 0;
-}
-
-int main(int argc, char* argv[]) {
-    signal(SIGPIPE, SIG_IGN);
-    struct option longopts[] = {
-            {"help", no_argument, nullptr, 'h'},
-            {0, 0, nullptr, 0},
-    };
-
-    int opt;
-    while ((opt = getopt_long(argc, argv, "tvaqf:h", longopts, nullptr)) != -1) {
-        switch (opt) {
-            case 't':
-                g_terse = true;
-                break;
-            case 'a':
-                g_show_addr = true;
-                break;
-            case 'v':
-                g_verbose = true;
-                break;
-            case 'q':
-                g_quiet = true;
-                break;
-            case 'f':
-                g_filename = optarg;
-                break;
-            case 'h':
-                usage(argv[0], EXIT_SUCCESS);
-            default:
-                usage(argv[0], EXIT_FAILURE);
-        }
-    }
-
-    if (g_filename.empty()) {
-        if ((argc - 1) < optind) {
-            fprintf(stderr, "Invalid arguments: Must provide <pid> at the end\n");
-            usage(argv[0], EXIT_FAILURE);
-        }
-
-        g_pid = atoi(argv[optind]);
-        if (g_pid <= 0) {
-            fprintf(stderr, "Invalid process id %s\n", argv[optind]);
-            usage(argv[0], EXIT_FAILURE);
-        }
-
-        g_filename = ::android::base::StringPrintf("/proc/%d/smaps", g_pid);
-    }
-
-    g_merge_by_names = !g_verbose && !g_show_addr;
-    return showmap();
-}
diff --git a/libmeminfo/tools/wsstop.cpp b/libmeminfo/tools/wsstop.cpp
deleted file mode 100644
index 368d04e..0000000
--- a/libmeminfo/tools/wsstop.cpp
+++ /dev/null
@@ -1,219 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <getopt.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <algorithm>
-#include <memory>
-#include <string>
-#include <vector>
-
-#include <meminfo/pageacct.h>
-#include <meminfo/procmeminfo.h>
-
-using ::android::meminfo::ProcMemInfo;
-using ::android::meminfo::Vma;
-
-// Global options
-static int32_t g_delay = 0;
-static int32_t g_total = 2;
-static pid_t g_pid = -1;
-
-[[noreturn]] static void usage(int exit_status) {
-    fprintf(stderr,
-            "%s [-d DELAY_BETWEEN_EACH_SAMPLE] [-n REFRESH_TOTAL] PID\n"
-            "-d\tdelay between each working set sample (default 0)\n"
-            "-n\ttotal number of refreshes before we exit (default 2)\n",
-            getprogname());
-
-    exit(exit_status);
-}
-
-static void print_header() {
-    const char* addr1 = "           start              end ";
-    const char* addr2 = "            addr             addr ";
-
-    printf("%s  virtual                        shared    shared   private   private\n", addr1);
-    printf("%s     size       RSS       PSS     clean     dirty     clean     dirty      swap   "
-           "swapPSS",
-           addr2);
-    printf(" object\n");
-}
-
-static void print_divider() {
-    printf("---------------- ---------------- ");
-    printf("--------- --------- --------- --------- --------- --------- --------- --------- "
-           "--------- ");
-    printf("------------------------------\n");
-}
-
-static void print_vma(const Vma& v) {
-    printf("%16" PRIx64 " %16" PRIx64 " ", v.start, v.end);
-    printf("%8" PRIu64 "K %8" PRIu64 "K %8" PRIu64 "K %8" PRIu64 "K %8" PRIu64 "K %8" PRIu64
-           "K %8" PRIu64 "K %8" PRIu64 "K %8" PRIu64 "K ",
-           v.usage.vss / 1024, v.usage.rss / 1024, v.usage.pss / 1024, v.usage.shared_clean / 1024,
-           v.usage.shared_dirty / 1024, v.usage.private_clean / 1024, v.usage.private_dirty / 1024,
-           v.usage.swap / 1024, v.usage.swap_pss / 1024);
-    printf("%s\n", v.name.c_str());
-}
-
-static bool same_vma(const Vma& cur, const Vma& last) {
-    return (cur.start == last.start && cur.end == last.end && cur.name == last.name &&
-            cur.flags == last.flags && cur.offset == last.offset);
-}
-
-static Vma diff_vma_params(const Vma& cur, const Vma& last) {
-    Vma res;
-    res.usage.shared_clean = cur.usage.shared_clean > last.usage.shared_clean
-                                     ? cur.usage.shared_clean - last.usage.shared_clean
-                                     : 0;
-    res.usage.shared_dirty = cur.usage.shared_dirty > last.usage.shared_dirty
-                                     ? cur.usage.shared_dirty - last.usage.shared_dirty
-                                     : 0;
-    res.usage.private_clean = cur.usage.private_clean > last.usage.private_clean
-                                      ? cur.usage.private_clean - last.usage.private_clean
-                                      : 0;
-    res.usage.private_dirty = cur.usage.private_dirty > last.usage.private_dirty
-                                      ? cur.usage.private_dirty - last.usage.private_dirty
-                                      : 0;
-
-    res.usage.rss = cur.usage.rss > last.usage.rss ? cur.usage.rss - last.usage.rss : 0;
-    res.usage.pss = cur.usage.pss > last.usage.pss ? cur.usage.pss - last.usage.pss : 0;
-    res.usage.uss = cur.usage.uss > last.usage.uss ? cur.usage.uss - last.usage.uss : 0;
-    res.usage.swap = cur.usage.swap > last.usage.swap ? cur.usage.swap - last.usage.swap : 0;
-    res.usage.swap_pss =
-            cur.usage.swap_pss > last.usage.swap_pss ? cur.usage.swap_pss - last.usage.swap_pss : 0;
-
-    // set vma properties to the same as the current one.
-    res.start = cur.start;
-    res.end = cur.end;
-    res.offset = cur.offset;
-    res.flags = cur.flags;
-    res.name = cur.name;
-    return res;
-}
-
-static void diff_workingset(std::vector<Vma>& wss, std::vector<Vma>& old, std::vector<Vma>* res) {
-    res->clear();
-    auto vma_sorter = [](const Vma& a, const Vma& b) { return a.start < b.start; };
-    std::sort(wss.begin(), wss.end(), vma_sorter);
-    std::sort(old.begin(), old.end(), vma_sorter);
-    if (old.empty()) {
-        *res = wss;
-        return;
-    }
-
-    for (auto& i : wss) {
-        bool found_same_vma = false;
-        // TODO: This is highly inefficient, fix it if it takes
-        // too long. Worst case will be system_server
-        for (auto& j : old) {
-            if (same_vma(i, j)) {
-                res->emplace_back(diff_vma_params(i, j));
-                found_same_vma = true;
-                break;
-            }
-        }
-
-        if (!found_same_vma) {
-            res->emplace_back(i);
-        }
-    }
-
-    std::sort(res->begin(), res->end(), vma_sorter);
-    return;
-}
-
-static int workingset() {
-    std::vector<Vma> last_wss = {};
-    std::vector<Vma> diff_wss = {};
-    uint32_t nr_refresh = 0;
-
-    while (true) {
-        std::unique_ptr<ProcMemInfo> proc_mem = std::make_unique<ProcMemInfo>(g_pid, true);
-        std::vector<Vma> wss = proc_mem->MapsWithPageIdle();
-
-        diff_workingset(wss, last_wss, &diff_wss);
-        diff_wss.erase(std::remove_if(diff_wss.begin(), diff_wss.end(),
-                                      [](const auto& v) { return v.usage.rss == 0; }),
-                       diff_wss.end());
-        if ((nr_refresh % 5) == 0) {
-            print_header();
-            print_divider();
-        }
-
-        for (const auto& v : diff_wss) {
-            print_vma(v);
-        }
-
-        nr_refresh++;
-        if (nr_refresh == g_total) {
-            break;
-        }
-
-        last_wss = wss;
-        sleep(g_delay);
-        print_divider();
-    }
-
-    return 0;
-}
-
-int main(int argc, char* argv[]) {
-    struct option longopts[] = {
-            {"help", no_argument, nullptr, 'h'},
-            {0, 0, nullptr, 0},
-    };
-
-    int opt;
-    while ((opt = getopt_long(argc, argv, "d:n:h", longopts, nullptr)) != -1) {
-        switch (opt) {
-            case 'd':
-                g_delay = atoi(optarg);
-                break;
-            case 'n':
-                g_total = atoi(optarg);
-                break;
-            case 'h':
-                usage(EXIT_SUCCESS);
-            default:
-                usage(EXIT_FAILURE);
-        }
-    }
-
-    if ((argc - 1) < optind) {
-        fprintf(stderr, "Invalid arguments: Must provide <pid> at the end\n");
-        usage(EXIT_FAILURE);
-    }
-
-    g_pid = atoi(argv[optind]);
-    if (g_pid <= 0) {
-        fprintf(stderr, "Invalid process id %s\n", argv[optind]);
-        usage(EXIT_FAILURE);
-    }
-
-    if (!::android::meminfo::PageAcct::KernelHasPageIdle()) {
-        fprintf(stderr, "Missing support for Idle page tracking in the kernel\n");
-        return 0;
-    }
-
-    return workingset();
-}
diff --git a/libmeminfo/vts/AndroidTest.xml b/libmeminfo/vts/AndroidTest.xml
deleted file mode 100644
index 9614025..0000000
--- a/libmeminfo/vts/AndroidTest.xml
+++ /dev/null
@@ -1,30 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2019 The Android Open Source Project
-
-     Licensed under the Apache License, Version 2.0 (the "License");
-     you may not use this file except in compliance with the License.
-     You may obtain a copy of the License at
-
-          http://www.apache.org/licenses/LICENSE-2.0
-
-     Unless required by applicable law or agreed to in writing, software
-     distributed under the License is distributed on an "AS IS" BASIS,
-     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-     See the License for the specific language governing permissions and
-     limitations under the License.
--->
-<configuration description="Config for VTS VtsKernelMemInfoTest.">
-    <option name="config-descriptor:metadata" key="plan" value="vts-kernel" />
-    <target_preparer class="com.android.compatibility.common.tradefed.targetprep.VtsFilePusher">
-        <option name="abort-on-push-failure" value="false"/>
-        <option name="push-group" value="HostDrivenTest.push"/>
-    </target_preparer>
-    <test class="com.android.tradefed.testtype.VtsMultiDeviceTest">
-        <option name="test-module-name" value="VtsKernelMemInfoTest"/>
-        <option name="binary-test-source" value="_32bit::DATA/nativetest/vts_meminfo_test/vts_meminfo_test" />
-        <option name="binary-test-source" value="_64bit::DATA/nativetest64/vts_meminfo_test/vts_meminfo_test" />
-        <option name="binary-test-type" value="gtest"/>
-        <option name="precondition-first-api-level" value="29" />
-        <option name="test-timeout" value="10m"/>
-    </test>
-</configuration>
diff --git a/libmemtrack/.clang-format b/libmemtrack/.clang-format
deleted file mode 120000
index 1af4f51..0000000
--- a/libmemtrack/.clang-format
+++ /dev/null
@@ -1 +0,0 @@
-../.clang-format-4
\ No newline at end of file
diff --git a/libmemtrack/Android.bp b/libmemtrack/Android.bp
deleted file mode 100644
index 4e4554a..0000000
--- a/libmemtrack/Android.bp
+++ /dev/null
@@ -1,41 +0,0 @@
-// Copyright 2013 The Android Open Source Project
-
-cc_library_shared {
-    name: "libmemtrack",
-    vendor_available: true,
-    vndk: {
-        enabled: true,
-    },
-    srcs: ["memtrack.cpp"],
-    export_include_dirs: ["include"],
-    local_include_dirs: ["include"],
-    include_dirs: ["hardware/libhardware/include"],
-    shared_libs: [
-        "libhardware",
-        "liblog",
-        "libbase",
-        "libhidlbase",
-        "libhidltransport",
-        "libhwbinder",
-        "libutils",
-        "android.hardware.memtrack@1.0",
-    ],
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-}
-
-cc_binary {
-    name: "memtrack_test",
-    srcs: ["memtrack_test.cpp"],
-    static_libs: ["libc++fs"],
-    shared_libs: [
-        "libbase",
-        "libmemtrack",
-    ],
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-}
diff --git a/libmemtrack/OWNERS b/libmemtrack/OWNERS
deleted file mode 100644
index 70b375f..0000000
--- a/libmemtrack/OWNERS
+++ /dev/null
@@ -1 +0,0 @@
-ccross@google.com
diff --git a/libmemtrack/include/memtrack/memtrack.h b/libmemtrack/include/memtrack/memtrack.h
deleted file mode 100644
index 2134a6f..0000000
--- a/libmemtrack/include/memtrack/memtrack.h
+++ /dev/null
@@ -1,136 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef _LIBMEMTRACK_MEMTRACK_H_
-#define _LIBMEMTRACK_MEMTRACK_H_
-
-#include <sys/types.h>
-#include <stddef.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * struct memtrack_proc
- *
- * an opaque handle to the memory stats on a process.
- * Created with memtrack_proc_new, destroyed by
- * memtrack_proc_destroy.  Can be reused multiple times with
- * memtrack_proc_get.
- */
-struct memtrack_proc;
-
-/**
- * memtrack_proc_new
- *
- * Return a new handle to hold process memory stats.
- *
- * Returns NULL on error.
- */
-struct memtrack_proc *memtrack_proc_new(void);
-
-/**
- * memtrack_proc_destroy
- *
- * Free all memory associated with a process memory stats handle.
- */
-void memtrack_proc_destroy(struct memtrack_proc *p);
-
-/**
- * memtrack_proc_get
- *
- * Fill a process memory stats handle with data about the given pid.  Can be
- * called on a handle that was just allocated with memtrack_proc_new,
- * or on a handle that has been previously passed to memtrack_proc_get
- * to replace the data with new data on the same or another process.  It is
- * expected that the second call on the same handle should not require
- * allocating any new memory.
- *
- * Returns 0 on success, -errno on error.
- */
-int memtrack_proc_get(struct memtrack_proc *p, pid_t pid);
-
-/**
- * memtrack_proc_graphics_total
- *
- * Return total amount of memory that has been allocated for use as window
- * buffers.  Does not differentiate between memory that has already been
- * accounted for by reading /proc/pid/smaps and memory that has not been
- * accounted for.
- *
- * Returns non-negative size in bytes on success, -errno on error.
- */
-ssize_t memtrack_proc_graphics_total(struct memtrack_proc *p);
-
-/**
- * memtrack_proc_graphics_pss
- *
- * Return total amount of memory that has been allocated for use as window
- * buffers, but has not already been accounted for by reading /proc/pid/smaps.
- * Memory that is shared across processes may already be divided by the
- * number of processes that share it (preferred), or may be charged in full to
- * every process that shares it, depending on the capabilities of the driver.
- *
- * Returns non-negative size in bytes on success, -errno on error.
- */
-ssize_t memtrack_proc_graphics_pss(struct memtrack_proc *p);
-
-/**
- * memtrack_proc_gl_total
- *
- * Same as memtrack_proc_graphics_total, but counts GL memory (which
- * should not overlap with graphics memory) instead of graphics memory.
- *
- * Returns non-negative size in bytes on success, -errno on error.
- */
-ssize_t memtrack_proc_gl_total(struct memtrack_proc *p);
-
-/**
- * memtrack_proc_gl_pss
- *
- * Same as memtrack_proc_graphics_total, but counts GL memory (which
- * should not overlap with graphics memory) instead of graphics memory.
- *
- * Returns non-negative size in bytes on success, -errno on error.
- */
-ssize_t memtrack_proc_gl_pss(struct memtrack_proc *p);
-
-/**
- * memtrack_proc_other_total
- *
- * Same as memtrack_proc_graphics_total, but counts miscellaneous memory
- * not tracked by gl or graphics calls above.
- *
- * Returns non-negative size in bytes on success, -errno on error.
- */
-ssize_t memtrack_proc_other_total(struct memtrack_proc *p);
-
-/**
- * memtrack_proc_other_pss
- *
- * Same as memtrack_proc_graphics_total, but counts miscellaneous memory
- * not tracked by gl or graphics calls above.
- *
- * Returns non-negative size in bytes on success, -errno on error.
- */
-ssize_t memtrack_proc_other_pss(struct memtrack_proc *p);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/libmemtrack/memtrack.cpp b/libmemtrack/memtrack.cpp
deleted file mode 100644
index c5e74c1..0000000
--- a/libmemtrack/memtrack.cpp
+++ /dev/null
@@ -1,173 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#define LOG_TAG "memtrack"
-#include <android/hardware/memtrack/1.0/IMemtrack.h>
-#include <memtrack/memtrack.h>
-
-#include <errno.h>
-#include <malloc.h>
-#include <vector>
-#include <string.h>
-#include <mutex>
-
-#include <log/log.h>
-
-using android::hardware::memtrack::V1_0::IMemtrack;
-using android::hardware::memtrack::V1_0::MemtrackType;
-using android::hardware::memtrack::V1_0::MemtrackRecord;
-using android::hardware::memtrack::V1_0::MemtrackFlag;
-using android::hardware::memtrack::V1_0::MemtrackStatus;
-using android::hardware::hidl_vec;
-using android::hardware::Return;
-
-struct memtrack_proc_type {
-    MemtrackType type;
-    std::vector<MemtrackRecord> records;
-};
-
-struct memtrack_proc {
-    pid_t pid;
-    memtrack_proc_type types[static_cast<int>(MemtrackType::NUM_TYPES)];
-};
-
-//TODO(b/31632518)
-static android::sp<IMemtrack> get_instance() {
-    static android::sp<IMemtrack> module = IMemtrack::getService();
-    if (module == nullptr) {
-        ALOGE("Couldn't load memtrack module");
-    }
-    return module;
-}
-
-memtrack_proc *memtrack_proc_new(void)
-{
-    return new memtrack_proc();
-}
-
-void memtrack_proc_destroy(memtrack_proc *p)
-{
-    delete(p);
-}
-
-static int memtrack_proc_get_type(memtrack_proc_type *t,
-        pid_t pid, MemtrackType type)
-{
-    int err = 0;
-    android::sp<IMemtrack> memtrack = get_instance();
-    if (memtrack == nullptr)
-        return -1;
-
-    Return<void> ret = memtrack->getMemory(pid, type,
-        [&t, &err](MemtrackStatus status, hidl_vec<MemtrackRecord> records) {
-            if (status != MemtrackStatus::SUCCESS) {
-                err = -1;
-                t->records.resize(0);
-            }
-            t->records.resize(records.size());
-            for (size_t i = 0; i < records.size(); i++) {
-                t->records[i].sizeInBytes = records[i].sizeInBytes;
-                t->records[i].flags = records[i].flags;
-            }
-    });
-    return ret.isOk() ? err : -1;
-}
-
-/* TODO: sanity checks on return values from HALs:
- *   make sure no records have invalid flags set
- *    - unknown flags
- *    - too many flags of a single category
- *    - missing ACCOUNTED/UNACCOUNTED
- *   make sure there are not overlapping SHARED and SHARED_PSS records
- */
-static int memtrack_proc_sanity_check(memtrack_proc* /*p*/)
-{
-    return 0;
-}
-
-int memtrack_proc_get(memtrack_proc *p, pid_t pid)
-{
-    if (!p) {
-        return -EINVAL;
-    }
-
-    p->pid = pid;
-    for (uint32_t i = 0; i < (uint32_t)MemtrackType::NUM_TYPES; i++) {
-        int ret = memtrack_proc_get_type(&p->types[i], pid, (MemtrackType)i);
-        if (ret != 0)
-           return ret;
-    }
-
-    return memtrack_proc_sanity_check(p);
-}
-
-static ssize_t memtrack_proc_sum(memtrack_proc *p,
-        const std::vector<MemtrackType>& types, uint32_t flags)
-{
-    ssize_t sum = 0;
-
-    for (size_t i = 0; i < types.size(); i++) {
-        memtrack_proc_type type = p->types[static_cast<int>(types[i])];
-        std::vector<MemtrackRecord> records = type.records;
-        for (size_t j = 0; j < records.size(); j++) {
-            if ((records[j].flags & flags) == flags) {
-                sum += records[j].sizeInBytes;
-            }
-        }
-    }
-
-    return sum;
-}
-
-ssize_t memtrack_proc_graphics_total(memtrack_proc *p)
-{
-    std::vector<MemtrackType> types = {MemtrackType::GRAPHICS};
-    return memtrack_proc_sum(p, types, 0);
-}
-
-ssize_t memtrack_proc_graphics_pss(memtrack_proc *p)
-{
-    std::vector<MemtrackType> types = { MemtrackType::GRAPHICS };
-    return memtrack_proc_sum(p, types,
-            (uint32_t)MemtrackFlag::SMAPS_UNACCOUNTED);
-}
-
-ssize_t memtrack_proc_gl_total(memtrack_proc *p)
-{
-    std::vector<MemtrackType> types = { MemtrackType::GL };
-    return memtrack_proc_sum(p, types, 0);
-}
-
-ssize_t memtrack_proc_gl_pss(memtrack_proc *p)
-{
-    std::vector<MemtrackType> types = { MemtrackType::GL };
-    return memtrack_proc_sum(p, types,
-            (uint32_t)MemtrackFlag::SMAPS_UNACCOUNTED);
-}
-
-ssize_t memtrack_proc_other_total(memtrack_proc *p)
-{
-    std::vector<MemtrackType> types = { MemtrackType::MULTIMEDIA,
-            MemtrackType::CAMERA, MemtrackType::OTHER };
-    return memtrack_proc_sum(p, types, 0);
-}
-
-ssize_t memtrack_proc_other_pss(memtrack_proc *p)
-{
-    std::vector<MemtrackType> types = { MemtrackType::MULTIMEDIA,
-            MemtrackType::CAMERA, MemtrackType::OTHER };
-    return memtrack_proc_sum(p, types,
-            (uint32_t)MemtrackFlag::SMAPS_UNACCOUNTED);
-}
diff --git a/libmemtrack/memtrack_test.cpp b/libmemtrack/memtrack_test.cpp
deleted file mode 100644
index aeeaf24..0000000
--- a/libmemtrack/memtrack_test.cpp
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-
-#include <filesystem>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/parseint.h>
-#include <android-base/stringprintf.h>
-#include <memtrack/memtrack.h>
-
-#define DIV_ROUND_UP(x, y) (((x) + (y)-1) / (y))
-
-static void getprocname(pid_t pid, std::string* name) {
-    std::string fname = ::android::base::StringPrintf("/proc/%d/cmdline", pid);
-    if (!::android::base::ReadFileToString(fname, name)) {
-        fprintf(stderr, "Failed to read cmdline from: %s\n", fname.c_str());
-        *name = "<unknown>";
-    }
-}
-
-int main(int /* argc */, char** /* argv */) {
-    int ret;
-    struct memtrack_proc* p;
-    std::vector<pid_t> pids;
-
-    p = memtrack_proc_new();
-    if (p == nullptr) {
-        fprintf(stderr, "failed to create memtrack process handle\n");
-        exit(EXIT_FAILURE);
-    }
-
-    for (auto& de : std::filesystem::directory_iterator("/proc")) {
-        if (!std::filesystem::is_directory(de.status())) {
-            continue;
-        }
-
-        pid_t pid;
-        if (!::android::base::ParseInt(de.path().filename().string(), &pid)) {
-            continue;
-        }
-        pids.emplace_back(pid);
-    }
-
-    for (auto& pid : pids) {
-        size_t v1;
-        size_t v2;
-        size_t v3;
-        size_t v4;
-        size_t v5;
-        size_t v6;
-        std::string cmdline;
-
-        getprocname(pid, &cmdline);
-
-        ret = memtrack_proc_get(p, pid);
-        if (ret) {
-            fprintf(stderr, "failed to get memory info for pid %d: %s (%d)\n", pid, strerror(-ret),
-                    ret);
-            continue;
-        }
-
-        v1 = DIV_ROUND_UP(memtrack_proc_graphics_total(p), 1024);
-        v2 = DIV_ROUND_UP(memtrack_proc_graphics_pss(p), 1024);
-        v3 = DIV_ROUND_UP(memtrack_proc_gl_total(p), 1024);
-        v4 = DIV_ROUND_UP(memtrack_proc_gl_pss(p), 1024);
-        v5 = DIV_ROUND_UP(memtrack_proc_other_total(p), 1024);
-        v6 = DIV_ROUND_UP(memtrack_proc_other_pss(p), 1024);
-
-        if (v1 | v2 | v3 | v4 | v5 | v6) {
-            fprintf(stdout, "%5d %6zu %6zu %6zu %6zu %6zu %6zu %s\n", pid, v1, v2, v3, v4, v5, v6,
-                    cmdline.c_str());
-        }
-    }
-
-    memtrack_proc_destroy(p);
-
-    return ret;
-}
diff --git a/libmemunreachable/Allocator.cpp b/libmemunreachable/Allocator.cpp
deleted file mode 100644
index 1eb7e98..0000000
--- a/libmemunreachable/Allocator.cpp
+++ /dev/null
@@ -1,468 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-// Header page:
-//
-// For minimum allocation size (8 bytes), bitmap can store used allocations for
-// up to 4032*8*8=258048, which is 256KiB minus the header page
-
-#include <assert.h>
-#include <stdlib.h>
-
-#include <sys/cdefs.h>
-#include <sys/mman.h>
-#include <sys/prctl.h>
-
-#include <cmath>
-#include <cstddef>
-#include <cstdint>
-#include <memory>
-#include <mutex>
-
-#include "android-base/macros.h"
-
-#include "Allocator.h"
-#include "LinkedList.h"
-
-namespace android {
-
-// runtime interfaces used:
-// abort
-// assert - fprintf + mmap
-// mmap
-// munmap
-// prctl
-
-constexpr size_t const_log2(size_t n, size_t p = 0) {
-  return (n <= 1) ? p : const_log2(n / 2, p + 1);
-}
-
-constexpr unsigned int div_round_up(unsigned int x, unsigned int y) {
-  return (x + y - 1) / y;
-}
-
-static constexpr size_t kPageSize = 4096;
-static constexpr size_t kChunkSize = 256 * 1024;
-static constexpr size_t kUsableChunkSize = kChunkSize - kPageSize;
-static constexpr size_t kMaxBucketAllocationSize = kChunkSize / 4;
-static constexpr size_t kMinBucketAllocationSize = 8;
-static constexpr unsigned int kNumBuckets =
-    const_log2(kMaxBucketAllocationSize) - const_log2(kMinBucketAllocationSize) + 1;
-static constexpr unsigned int kUsablePagesPerChunk = kUsableChunkSize / kPageSize;
-
-std::atomic<int> heap_count;
-
-class Chunk;
-
-class HeapImpl {
- public:
-  HeapImpl();
-  ~HeapImpl();
-  void* operator new(std::size_t count) noexcept;
-  void operator delete(void* ptr);
-
-  void* Alloc(size_t size);
-  void Free(void* ptr);
-  bool Empty();
-
-  void MoveToFullList(Chunk* chunk, int bucket_);
-  void MoveToFreeList(Chunk* chunk, int bucket_);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(HeapImpl);
-
-  LinkedList<Chunk*> free_chunks_[kNumBuckets];
-  LinkedList<Chunk*> full_chunks_[kNumBuckets];
-
-  void MoveToList(Chunk* chunk, LinkedList<Chunk*>* head);
-  void* MapAlloc(size_t size);
-  void MapFree(void* ptr);
-  void* AllocLocked(size_t size);
-  void FreeLocked(void* ptr);
-
-  struct MapAllocation {
-    void* ptr;
-    size_t size;
-    MapAllocation* next;
-  };
-  MapAllocation* map_allocation_list_;
-  std::mutex m_;
-};
-
-// Integer log 2, rounds down
-static inline unsigned int log2(size_t n) {
-  return 8 * sizeof(unsigned long long) - __builtin_clzll(n) - 1;
-}
-
-static inline unsigned int size_to_bucket(size_t size) {
-  if (size < kMinBucketAllocationSize) return kMinBucketAllocationSize;
-  return log2(size - 1) + 1 - const_log2(kMinBucketAllocationSize);
-}
-
-static inline size_t bucket_to_size(unsigned int bucket) {
-  return kMinBucketAllocationSize << bucket;
-}
-
-static void* MapAligned(size_t size, size_t align) {
-  const int prot = PROT_READ | PROT_WRITE;
-  const int flags = MAP_ANONYMOUS | MAP_PRIVATE;
-
-  size = (size + kPageSize - 1) & ~(kPageSize - 1);
-
-  // Over-allocate enough to align
-  size_t map_size = size + align - kPageSize;
-  if (map_size < size) {
-    return nullptr;
-  }
-
-  void* ptr = mmap(NULL, map_size, prot, flags, -1, 0);
-  if (ptr == MAP_FAILED) {
-    return nullptr;
-  }
-
-  size_t aligned_size = map_size;
-  void* aligned_ptr = ptr;
-
-  std::align(align, size, aligned_ptr, aligned_size);
-
-  // Trim beginning
-  if (aligned_ptr != ptr) {
-    ptrdiff_t extra = reinterpret_cast<uintptr_t>(aligned_ptr) - reinterpret_cast<uintptr_t>(ptr);
-    munmap(ptr, extra);
-    map_size -= extra;
-    ptr = aligned_ptr;
-  }
-
-  // Trim end
-  if (map_size != size) {
-    assert(map_size > size);
-    assert(ptr != NULL);
-    munmap(reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(ptr) + size), map_size - size);
-  }
-
-#if defined(PR_SET_VMA)
-  prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, reinterpret_cast<uintptr_t>(ptr), size,
-        "leak_detector_malloc");
-#endif
-
-  return ptr;
-}
-
-class Chunk {
- public:
-  static void* operator new(std::size_t count) noexcept;
-  static void operator delete(void* ptr);
-  Chunk(HeapImpl* heap, int bucket);
-  ~Chunk() {}
-
-  void* Alloc();
-  void Free(void* ptr);
-  void Purge();
-  bool Empty();
-
-  static Chunk* ptr_to_chunk(void* ptr) {
-    return reinterpret_cast<Chunk*>(reinterpret_cast<uintptr_t>(ptr) & ~(kChunkSize - 1));
-  }
-  static bool is_chunk(void* ptr) {
-    return (reinterpret_cast<uintptr_t>(ptr) & (kChunkSize - 1)) != 0;
-  }
-
-  unsigned int free_count() { return free_count_; }
-  HeapImpl* heap() { return heap_; }
-  LinkedList<Chunk*> node_;  // linked list sorted by minimum free count
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(Chunk);
-  HeapImpl* heap_;
-  unsigned int bucket_;
-  unsigned int allocation_size_;    // size of allocations in chunk, min 8 bytes
-  unsigned int max_allocations_;    // maximum number of allocations in the chunk
-  unsigned int first_free_bitmap_;  // index into bitmap for first non-full entry
-  unsigned int free_count_;         // number of available allocations
-  unsigned int frees_since_purge_;  // number of calls to Free since last Purge
-
-  // bitmap of pages that have been dirtied
-  uint32_t dirty_pages_[div_round_up(kUsablePagesPerChunk, 32)];
-
-  // bitmap of free allocations.
-  uint32_t free_bitmap_[kUsableChunkSize / kMinBucketAllocationSize / 32];
-
-  char data_[0];
-
-  unsigned int ptr_to_n(void* ptr) {
-    ptrdiff_t offset = reinterpret_cast<uintptr_t>(ptr) - reinterpret_cast<uintptr_t>(data_);
-    return offset / allocation_size_;
-  }
-  void* n_to_ptr(unsigned int n) { return data_ + n * allocation_size_; }
-};
-static_assert(sizeof(Chunk) <= kPageSize, "header must fit in page");
-
-// Override new operator on chunk to use mmap to allocate kChunkSize
-void* Chunk::operator new(std::size_t count __attribute__((unused))) noexcept {
-  assert(count == sizeof(Chunk));
-  void* mem = MapAligned(kChunkSize, kChunkSize);
-  if (!mem) {
-    abort();  // throw std::bad_alloc;
-  }
-
-  return mem;
-}
-
-// Override new operator on chunk to use mmap to allocate kChunkSize
-void Chunk::operator delete(void* ptr) {
-  assert(reinterpret_cast<Chunk*>(ptr) == ptr_to_chunk(ptr));
-  munmap(ptr, kChunkSize);
-}
-
-Chunk::Chunk(HeapImpl* heap, int bucket)
-    : node_(this),
-      heap_(heap),
-      bucket_(bucket),
-      allocation_size_(bucket_to_size(bucket)),
-      max_allocations_(kUsableChunkSize / allocation_size_),
-      first_free_bitmap_(0),
-      free_count_(max_allocations_),
-      frees_since_purge_(0) {
-  memset(dirty_pages_, 0, sizeof(dirty_pages_));
-  memset(free_bitmap_, 0xff, sizeof(free_bitmap_));
-}
-
-bool Chunk::Empty() {
-  return free_count_ == max_allocations_;
-}
-
-void* Chunk::Alloc() {
-  assert(free_count_ > 0);
-
-  unsigned int i = first_free_bitmap_;
-  while (free_bitmap_[i] == 0) i++;
-  assert(i < arraysize(free_bitmap_));
-  unsigned int bit = __builtin_ffs(free_bitmap_[i]) - 1;
-  assert(free_bitmap_[i] & (1U << bit));
-  free_bitmap_[i] &= ~(1U << bit);
-  unsigned int n = i * 32 + bit;
-  assert(n < max_allocations_);
-
-  unsigned int page = n * allocation_size_ / kPageSize;
-  assert(page / 32 < arraysize(dirty_pages_));
-  dirty_pages_[page / 32] |= 1U << (page % 32);
-
-  free_count_--;
-  if (free_count_ == 0) {
-    heap_->MoveToFullList(this, bucket_);
-  }
-
-  return n_to_ptr(n);
-}
-
-void Chunk::Free(void* ptr) {
-  assert(is_chunk(ptr));
-  assert(ptr_to_chunk(ptr) == this);
-
-  unsigned int n = ptr_to_n(ptr);
-  unsigned int i = n / 32;
-  unsigned int bit = n % 32;
-
-  assert(i < arraysize(free_bitmap_));
-  assert(!(free_bitmap_[i] & (1U << bit)));
-  free_bitmap_[i] |= 1U << bit;
-  free_count_++;
-
-  if (i < first_free_bitmap_) {
-    first_free_bitmap_ = i;
-  }
-
-  if (free_count_ == 1) {
-    heap_->MoveToFreeList(this, bucket_);
-  } else {
-    // TODO(ccross): move down free list if necessary
-  }
-
-  if (frees_since_purge_++ * allocation_size_ > 16 * kPageSize) {
-    Purge();
-  }
-}
-
-void Chunk::Purge() {
-  frees_since_purge_ = 0;
-
-  // unsigned int allocsPerPage = kPageSize / allocation_size_;
-}
-
-// Override new operator on HeapImpl to use mmap to allocate a page
-void* HeapImpl::operator new(std::size_t count __attribute__((unused))) noexcept {
-  assert(count == sizeof(HeapImpl));
-  void* mem = MapAligned(kPageSize, kPageSize);
-  if (!mem) {
-    abort();  // throw std::bad_alloc;
-  }
-
-  heap_count++;
-  return mem;
-}
-
-void HeapImpl::operator delete(void* ptr) {
-  munmap(ptr, kPageSize);
-}
-
-HeapImpl::HeapImpl() : free_chunks_(), full_chunks_(), map_allocation_list_(NULL) {}
-
-bool HeapImpl::Empty() {
-  for (unsigned int i = 0; i < kNumBuckets; i++) {
-    for (LinkedList<Chunk*>* it = free_chunks_[i].next(); it->data() != NULL; it = it->next()) {
-      if (!it->data()->Empty()) {
-        return false;
-      }
-    }
-    for (LinkedList<Chunk*>* it = full_chunks_[i].next(); it->data() != NULL; it = it->next()) {
-      if (!it->data()->Empty()) {
-        return false;
-      }
-    }
-  }
-
-  return true;
-}
-
-HeapImpl::~HeapImpl() {
-  for (unsigned int i = 0; i < kNumBuckets; i++) {
-    while (!free_chunks_[i].empty()) {
-      Chunk* chunk = free_chunks_[i].next()->data();
-      chunk->node_.remove();
-      delete chunk;
-    }
-    while (!full_chunks_[i].empty()) {
-      Chunk* chunk = full_chunks_[i].next()->data();
-      chunk->node_.remove();
-      delete chunk;
-    }
-  }
-}
-
-void* HeapImpl::Alloc(size_t size) {
-  std::lock_guard<std::mutex> lk(m_);
-  return AllocLocked(size);
-}
-
-void* HeapImpl::AllocLocked(size_t size) {
-  if (size > kMaxBucketAllocationSize) {
-    return MapAlloc(size);
-  }
-  int bucket = size_to_bucket(size);
-  if (free_chunks_[bucket].empty()) {
-    Chunk* chunk = new Chunk(this, bucket);
-    free_chunks_[bucket].insert(chunk->node_);
-  }
-  return free_chunks_[bucket].next()->data()->Alloc();
-}
-
-void HeapImpl::Free(void* ptr) {
-  std::lock_guard<std::mutex> lk(m_);
-  FreeLocked(ptr);
-}
-
-void HeapImpl::FreeLocked(void* ptr) {
-  if (!Chunk::is_chunk(ptr)) {
-    HeapImpl::MapFree(ptr);
-  } else {
-    Chunk* chunk = Chunk::ptr_to_chunk(ptr);
-    assert(chunk->heap() == this);
-    chunk->Free(ptr);
-  }
-}
-
-void* HeapImpl::MapAlloc(size_t size) {
-  size = (size + kPageSize - 1) & ~(kPageSize - 1);
-
-  MapAllocation* allocation = reinterpret_cast<MapAllocation*>(AllocLocked(sizeof(MapAllocation)));
-  void* ptr = MapAligned(size, kChunkSize);
-  if (!ptr) {
-    FreeLocked(allocation);
-    abort();  // throw std::bad_alloc;
-  }
-  allocation->ptr = ptr;
-  allocation->size = size;
-  allocation->next = map_allocation_list_;
-  map_allocation_list_ = allocation;
-
-  return ptr;
-}
-
-void HeapImpl::MapFree(void* ptr) {
-  MapAllocation** allocation = &map_allocation_list_;
-  while (*allocation && (*allocation)->ptr != ptr) allocation = &(*allocation)->next;
-
-  assert(*allocation != nullptr);
-
-  munmap((*allocation)->ptr, (*allocation)->size);
-  FreeLocked(*allocation);
-
-  *allocation = (*allocation)->next;
-}
-
-void HeapImpl::MoveToFreeList(Chunk* chunk, int bucket) {
-  MoveToList(chunk, &free_chunks_[bucket]);
-}
-
-void HeapImpl::MoveToFullList(Chunk* chunk, int bucket) {
-  MoveToList(chunk, &full_chunks_[bucket]);
-}
-
-void HeapImpl::MoveToList(Chunk* chunk, LinkedList<Chunk*>* head) {
-  // Remove from old list
-  chunk->node_.remove();
-
-  LinkedList<Chunk*>* node = head;
-  // Insert into new list, sorted by lowest free count
-  while (node->next() != head && node->data() != nullptr &&
-         node->data()->free_count() < chunk->free_count())
-    node = node->next();
-
-  node->insert(chunk->node_);
-}
-
-Heap::Heap() {
-  // HeapImpl overloads the operator new in order to mmap itself instead of
-  // allocating with new.
-  // Can't use a shared_ptr to store the result because shared_ptr needs to
-  // allocate, and Allocator<T> is still being constructed.
-  impl_ = new HeapImpl();
-  owns_impl_ = true;
-}
-
-Heap::~Heap() {
-  if (owns_impl_) {
-    delete impl_;
-  }
-}
-
-void* Heap::allocate(size_t size) {
-  return impl_->Alloc(size);
-}
-
-void Heap::deallocate(void* ptr) {
-  impl_->Free(ptr);
-}
-
-void Heap::deallocate(HeapImpl* impl, void* ptr) {
-  impl->Free(ptr);
-}
-
-bool Heap::empty() {
-  return impl_->Empty();
-}
-
-}  // namespace android
diff --git a/libmemunreachable/Allocator.h b/libmemunreachable/Allocator.h
deleted file mode 100644
index 837a12b..0000000
--- a/libmemunreachable/Allocator.h
+++ /dev/null
@@ -1,218 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_ALLOCATOR_H_
-#define LIBMEMUNREACHABLE_ALLOCATOR_H_
-
-#include <atomic>
-#include <cstddef>
-#include <functional>
-#include <list>
-#include <map>
-#include <memory>
-#include <set>
-#include <unordered_map>
-#include <unordered_set>
-#include <vector>
-
-namespace android {
-
-extern std::atomic<int> heap_count;
-
-class HeapImpl;
-
-template <typename T>
-class Allocator;
-
-// Non-templated class that implements wraps HeapImpl to keep
-// implementation out of the header file
-class Heap {
- public:
-  Heap();
-  ~Heap();
-
-  // Copy constructor that does not take ownership of impl_
-  Heap(const Heap& other) : impl_(other.impl_), owns_impl_(false) {}
-
-  // Assignment disabled
-  Heap& operator=(const Heap&) = delete;
-
-  // Allocate size bytes
-  void* allocate(size_t size);
-
-  // Deallocate allocation returned by allocate
-  void deallocate(void*);
-
-  bool empty();
-
-  static void deallocate(HeapImpl* impl, void* ptr);
-
-  // Allocate a class of type T
-  template <class T>
-  T* allocate() {
-    return reinterpret_cast<T*>(allocate(sizeof(T)));
-  }
-
-  // Comparators, copied objects will be equal
-  bool operator==(const Heap& other) const { return impl_ == other.impl_; }
-  bool operator!=(const Heap& other) const { return !(*this == other); }
-
-  // std::unique_ptr wrapper that allocates using allocate and deletes using
-  // deallocate
-  template <class T>
-  using unique_ptr = std::unique_ptr<T, std::function<void(void*)>>;
-
-  template <class T, class... Args>
-  unique_ptr<T> make_unique(Args&&... args) {
-    HeapImpl* impl = impl_;
-    return unique_ptr<T>(new (allocate<T>()) T(std::forward<Args>(args)...), [impl](void* ptr) {
-      reinterpret_cast<T*>(ptr)->~T();
-      deallocate(impl, ptr);
-    });
-  }
-
-  // std::unique_ptr wrapper that allocates using allocate and deletes using
-  // deallocate
-  template <class T>
-  using shared_ptr = std::shared_ptr<T>;
-
-  template <class T, class... Args>
-  shared_ptr<T> make_shared(Args&&... args);
-
- protected:
-  HeapImpl* impl_;
-  bool owns_impl_;
-};
-
-// STLAllocator implements the std allocator interface on top of a Heap
-template <typename T>
-class STLAllocator {
- public:
-  using value_type = T;
-  ~STLAllocator() {}
-
-  // Construct an STLAllocator on top of a Heap
-  STLAllocator(const Heap& heap)
-      :  // NOLINT, implicit
-        heap_(heap) {}
-
-  // Rebind an STLAllocator from an another STLAllocator
-  template <typename U>
-  STLAllocator(const STLAllocator<U>& other)
-      :  // NOLINT, implicit
-        heap_(other.heap_) {}
-
-  STLAllocator(const STLAllocator&) = default;
-  STLAllocator<T>& operator=(const STLAllocator<T>&) = default;
-
-  T* allocate(std::size_t n) { return reinterpret_cast<T*>(heap_.allocate(n * sizeof(T))); }
-
-  void deallocate(T* ptr, std::size_t) { heap_.deallocate(ptr); }
-
-  template <typename U>
-  bool operator==(const STLAllocator<U>& other) const {
-    return heap_ == other.heap_;
-  }
-  template <typename U>
-  inline bool operator!=(const STLAllocator<U>& other) const {
-    return !(this == other);
-  }
-
-  template <typename U>
-  friend class STLAllocator;
-
- protected:
-  Heap heap_;
-};
-
-// Allocator extends STLAllocator with some convenience methods for allocating
-// a single object and for constructing unique_ptr and shared_ptr objects with
-// appropriate deleters.
-template <class T>
-class Allocator : public STLAllocator<T> {
- public:
-  ~Allocator() {}
-
-  Allocator(const Heap& other)
-      :  // NOLINT, implicit
-        STLAllocator<T>(other) {}
-
-  template <typename U>
-  Allocator(const STLAllocator<U>& other)
-      :  // NOLINT, implicit
-        STLAllocator<T>(other) {}
-
-  Allocator(const Allocator&) = default;
-  Allocator<T>& operator=(const Allocator<T>&) = default;
-
-  using STLAllocator<T>::allocate;
-  using STLAllocator<T>::deallocate;
-  using STLAllocator<T>::heap_;
-
-  T* allocate() { return STLAllocator<T>::allocate(1); }
-  void deallocate(void* ptr) { heap_.deallocate(ptr); }
-
-  using shared_ptr = Heap::shared_ptr<T>;
-
-  template <class... Args>
-  shared_ptr make_shared(Args&&... args) {
-    return heap_.template make_shared<T>(std::forward<Args>(args)...);
-  }
-
-  using unique_ptr = Heap::unique_ptr<T>;
-
-  template <class... Args>
-  unique_ptr make_unique(Args&&... args) {
-    return heap_.template make_unique<T>(std::forward<Args>(args)...);
-  }
-};
-
-// std::unique_ptr wrapper that allocates using allocate and deletes using
-// deallocate.  Implemented outside class definition in order to pass
-// Allocator<T> to shared_ptr.
-template <class T, class... Args>
-inline Heap::shared_ptr<T> Heap::make_shared(Args&&... args) {
-  return std::allocate_shared<T, Allocator<T>, Args...>(Allocator<T>(*this),
-                                                        std::forward<Args>(args)...);
-}
-
-namespace allocator {
-
-template <class T>
-using vector = std::vector<T, Allocator<T>>;
-
-template <class T>
-using list = std::list<T, Allocator<T>>;
-
-template <class Key, class T, class Compare = std::less<Key>>
-using map = std::map<Key, T, Compare, Allocator<std::pair<const Key, T>>>;
-
-template <class Key, class T, class Hash = std::hash<Key>, class KeyEqual = std::equal_to<Key>>
-using unordered_map =
-    std::unordered_map<Key, T, Hash, KeyEqual, Allocator<std::pair<const Key, T>>>;
-
-template <class Key, class Hash = std::hash<Key>, class KeyEqual = std::equal_to<Key>>
-using unordered_set = std::unordered_set<Key, Hash, KeyEqual, Allocator<Key>>;
-
-template <class Key, class Compare = std::less<Key>>
-using set = std::set<Key, Compare, Allocator<Key>>;
-
-using string = std::basic_string<char, std::char_traits<char>, Allocator<char>>;
-}
-
-}  // namespace android
-
-#endif
diff --git a/libmemunreachable/Android.bp b/libmemunreachable/Android.bp
deleted file mode 100644
index 62a7266..0000000
--- a/libmemunreachable/Android.bp
+++ /dev/null
@@ -1,118 +0,0 @@
-cc_defaults {
-    name: "libmemunreachable_defaults",
-
-    cflags: [
-        "-Wall",
-        "-Wextra",
-        "-Werror",
-    ],
-    shared_libs: [
-        "libbase",
-    ],
-
-    target: {
-        android: {
-            static_libs: ["libasync_safe"],
-        },
-        host: {
-            shared_libs: ["liblog"],
-        },
-    },
-}
-
-cc_library {
-    name: "libmemunreachable",
-    vendor_available: true,
-    defaults: ["libmemunreachable_defaults"],
-    srcs: [
-        "Allocator.cpp",
-        "Binder.cpp",
-        "HeapWalker.cpp",
-        "LeakFolding.cpp",
-        "LeakPipe.cpp",
-        "MemUnreachable.cpp",
-        "ProcessMappings.cpp",
-        "PtracerThread.cpp",
-        "ThreadCapture.cpp",
-    ],
-
-    static_libs: [
-        "libc_malloc_debug_backtrace",
-        "libprocinfo",
-    ],
-    // Only need this for arm since libc++ uses its own unwind code that
-    // doesn't mix with the other default unwind code.
-    arch: {
-        arm: {
-            static_libs: ["libunwind_llvm"],
-        },
-    },
-    export_include_dirs: ["include"],
-    local_include_dirs: ["include"],
-    version_script: "libmemunreachable.map",
-}
-
-// Integration test that runs against the public API of libmemunreachable
-cc_test {
-    name: "memunreachable_test",
-    defaults: ["libmemunreachable_defaults"],
-    srcs: [
-        "tests/MemUnreachable_test.cpp",
-    ],
-    shared_libs: ["libmemunreachable"],
-
-    test_suites: ["device-tests"],
-}
-
-cc_test {
-    name: "memunreachable_unit_test",
-    defaults: ["libmemunreachable_defaults"],
-    host_supported: true,
-    srcs: [
-        "tests/Allocator_test.cpp",
-        "tests/HeapWalker_test.cpp",
-        "tests/LeakFolding_test.cpp",
-    ],
-
-    target: {
-        android: {
-            srcs: [
-                "tests/DisableMalloc_test.cpp",
-                "tests/MemUnreachable_test.cpp",
-                "tests/ThreadCapture_test.cpp",
-            ],
-            static_libs: [
-                "libmemunreachable",
-                "libc_malloc_debug_backtrace",
-            ],
-        },
-        host: {
-            srcs: [
-                "Allocator.cpp",
-                "HeapWalker.cpp",
-                "LeakFolding.cpp",
-                "tests/HostMallocStub.cpp",
-            ],
-        },
-        darwin: {
-            enabled: false,
-        },
-    },
-
-    test_suites: ["device-tests"],
-}
-
-cc_test {
-    name: "memunreachable_binder_test",
-    defaults: ["libmemunreachable_defaults"],
-    srcs: [
-        "tests/Binder_test.cpp",
-    ],
-    static_libs: ["libmemunreachable"],
-    shared_libs: [
-        "libbinder",
-        "libhwbinder",
-        "libutils",
-    ],
-    test_suites: ["device-tests"],
-}
diff --git a/libmemunreachable/Binder.cpp b/libmemunreachable/Binder.cpp
deleted file mode 100644
index 60512a3..0000000
--- a/libmemunreachable/Binder.cpp
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/cdefs.h>
-#include <unistd.h>
-
-#include <functional>
-
-#include "Binder.h"
-#include "log.h"
-
-__BEGIN_DECLS
-
-// Weak undefined references to the symbols in libbinder and libhwbinder
-// so that libmemunreachable can call them in processes that have them
-// loaded without requiring libmemunreachable to have dependencies on them.
-ssize_t __attribute__((weak)) getBinderKernelReferences(size_t, uintptr_t*);
-ssize_t __attribute__((weak)) getHWBinderKernelReferences(size_t, uintptr_t*);
-
-__END_DECLS
-
-namespace android {
-
-static bool BinderReferencesToVector(allocator::vector<uintptr_t>& refs,
-                                     std::function<ssize_t(size_t, uintptr_t*)> fn) {
-  if (fn == nullptr) {
-    return true;
-  }
-
-  size_t size = refs.size();
-
-  do {
-    refs.resize(size);
-
-    ssize_t ret = fn(refs.size(), refs.data());
-    if (ret < 0) {
-      return false;
-    }
-
-    size = ret;
-  } while (size > refs.size());
-
-  refs.resize(size);
-  return true;
-}
-
-bool BinderReferences(allocator::vector<uintptr_t>& refs) {
-  refs.clear();
-
-  allocator::vector<uintptr_t> binder_refs{refs.get_allocator()};
-  if (BinderReferencesToVector(refs, getBinderKernelReferences)) {
-    refs.insert(refs.end(), binder_refs.begin(), binder_refs.end());
-  } else {
-    MEM_ALOGE("getBinderKernelReferences failed");
-  }
-
-  allocator::vector<uintptr_t> hwbinder_refs{refs.get_allocator()};
-  if (BinderReferencesToVector(hwbinder_refs, getHWBinderKernelReferences)) {
-    refs.insert(refs.end(), hwbinder_refs.begin(), hwbinder_refs.end());
-  } else {
-    MEM_ALOGE("getHWBinderKernelReferences failed");
-  }
-
-  return true;
-}
-
-}  // namespace android
diff --git a/libmemunreachable/Binder.h b/libmemunreachable/Binder.h
deleted file mode 100644
index bf4fd3e..0000000
--- a/libmemunreachable/Binder.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_BINDER_H_
-#define LIBMEMUNREACHABLE_BINDER_H_
-
-#include "Allocator.h"
-
-namespace android {
-
-bool BinderReferences(allocator::vector<uintptr_t>& refs);
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_BINDER_H_
diff --git a/libmemunreachable/HeapWalker.cpp b/libmemunreachable/HeapWalker.cpp
deleted file mode 100644
index 7cae048..0000000
--- a/libmemunreachable/HeapWalker.cpp
+++ /dev/null
@@ -1,212 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <inttypes.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-#include <map>
-#include <utility>
-
-#include "Allocator.h"
-#include "HeapWalker.h"
-#include "LeakFolding.h"
-#include "ScopedSignalHandler.h"
-#include "log.h"
-
-namespace android {
-
-bool HeapWalker::Allocation(uintptr_t begin, uintptr_t end) {
-  if (end == begin) {
-    end = begin + 1;
-  }
-  Range range{begin, end};
-  if (valid_mappings_range_.end != 0 &&
-      (begin < valid_mappings_range_.begin || end > valid_mappings_range_.end)) {
-    MEM_LOG_ALWAYS_FATAL("allocation %p-%p is outside mapping range %p-%p",
-                         reinterpret_cast<void*>(begin), reinterpret_cast<void*>(end),
-                         reinterpret_cast<void*>(valid_mappings_range_.begin),
-                         reinterpret_cast<void*>(valid_mappings_range_.end));
-  }
-  auto inserted = allocations_.insert(std::pair<Range, AllocationInfo>(range, AllocationInfo{}));
-  if (inserted.second) {
-    valid_allocations_range_.begin = std::min(valid_allocations_range_.begin, begin);
-    valid_allocations_range_.end = std::max(valid_allocations_range_.end, end);
-    allocation_bytes_ += range.size();
-    return true;
-  } else {
-    Range overlap = inserted.first->first;
-    if (overlap != range) {
-      MEM_ALOGE("range %p-%p overlaps with existing range %p-%p", reinterpret_cast<void*>(begin),
-                reinterpret_cast<void*>(end), reinterpret_cast<void*>(overlap.begin),
-                reinterpret_cast<void*>(overlap.end));
-    }
-    return false;
-  }
-}
-
-// Sanitizers may consider certain memory inaccessible through certain pointers.
-// With MTE this will need to use unchecked instructions or disable tag checking globally.
-static uintptr_t ReadWordAtAddressUnsafe(uintptr_t word_ptr)
-    __attribute__((no_sanitize("address", "hwaddress"))) {
-  return *reinterpret_cast<uintptr_t*>(word_ptr);
-}
-
-bool HeapWalker::WordContainsAllocationPtr(uintptr_t word_ptr, Range* range, AllocationInfo** info) {
-  walking_ptr_ = word_ptr;
-  // This access may segfault if the process under test has done something strange,
-  // for example mprotect(PROT_NONE) on a native heap page.  If so, it will be
-  // caught and handled by mmaping a zero page over the faulting page.
-  uintptr_t value = ReadWordAtAddressUnsafe(word_ptr);
-  walking_ptr_ = 0;
-  if (value >= valid_allocations_range_.begin && value < valid_allocations_range_.end) {
-    AllocationMap::iterator it = allocations_.find(Range{value, value + 1});
-    if (it != allocations_.end()) {
-      *range = it->first;
-      *info = &it->second;
-      return true;
-    }
-  }
-  return false;
-}
-
-void HeapWalker::RecurseRoot(const Range& root) {
-  allocator::vector<Range> to_do(1, root, allocator_);
-  while (!to_do.empty()) {
-    Range range = to_do.back();
-    to_do.pop_back();
-
-    walking_range_ = range;
-    ForEachPtrInRange(range, [&](Range& ref_range, AllocationInfo* ref_info) {
-      if (!ref_info->referenced_from_root) {
-        ref_info->referenced_from_root = true;
-        to_do.push_back(ref_range);
-      }
-    });
-    walking_range_ = Range{0, 0};
-  }
-}
-
-void HeapWalker::Mapping(uintptr_t begin, uintptr_t end) {
-  valid_mappings_range_.begin = std::min(valid_mappings_range_.begin, begin);
-  valid_mappings_range_.end = std::max(valid_mappings_range_.end, end);
-}
-
-void HeapWalker::Root(uintptr_t begin, uintptr_t end) {
-  roots_.push_back(Range{begin, end});
-}
-
-void HeapWalker::Root(const allocator::vector<uintptr_t>& vals) {
-  root_vals_.insert(root_vals_.end(), vals.begin(), vals.end());
-}
-
-size_t HeapWalker::Allocations() {
-  return allocations_.size();
-}
-
-size_t HeapWalker::AllocationBytes() {
-  return allocation_bytes_;
-}
-
-bool HeapWalker::DetectLeaks() {
-  // Recursively walk pointers from roots to mark referenced allocations
-  for (auto it = roots_.begin(); it != roots_.end(); it++) {
-    RecurseRoot(*it);
-  }
-
-  Range vals;
-  vals.begin = reinterpret_cast<uintptr_t>(root_vals_.data());
-  vals.end = vals.begin + root_vals_.size() * sizeof(uintptr_t);
-
-  RecurseRoot(vals);
-
-  if (segv_page_count_ > 0) {
-    MEM_ALOGE("%zu pages skipped due to segfaults", segv_page_count_);
-  }
-
-  return true;
-}
-
-bool HeapWalker::Leaked(allocator::vector<Range>& leaked, size_t limit, size_t* num_leaks_out,
-                        size_t* leak_bytes_out) {
-  leaked.clear();
-
-  size_t num_leaks = 0;
-  size_t leak_bytes = 0;
-  for (auto it = allocations_.begin(); it != allocations_.end(); it++) {
-    if (!it->second.referenced_from_root) {
-      num_leaks++;
-      leak_bytes += it->first.end - it->first.begin;
-    }
-  }
-
-  size_t n = 0;
-  for (auto it = allocations_.begin(); it != allocations_.end(); it++) {
-    if (!it->second.referenced_from_root) {
-      if (n++ < limit) {
-        leaked.push_back(it->first);
-      }
-    }
-  }
-
-  if (num_leaks_out) {
-    *num_leaks_out = num_leaks;
-  }
-  if (leak_bytes_out) {
-    *leak_bytes_out = leak_bytes;
-  }
-
-  return true;
-}
-
-static bool MapOverPage(void* addr) {
-  const size_t page_size = sysconf(_SC_PAGE_SIZE);
-  void* page = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(addr) & ~(page_size - 1));
-
-  void* ret = mmap(page, page_size, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);
-  if (ret == MAP_FAILED) {
-    MEM_ALOGE("failed to map page at %p: %s", page, strerror(errno));
-    return false;
-  }
-
-  return true;
-}
-
-void HeapWalker::HandleSegFault(ScopedSignalHandler& handler, int signal, siginfo_t* si,
-                                void* /*uctx*/) {
-  uintptr_t addr = reinterpret_cast<uintptr_t>(si->si_addr);
-  if (addr != walking_ptr_) {
-    handler.reset();
-    return;
-  }
-  if (!segv_logged_) {
-    MEM_ALOGW("failed to read page at %p, signal %d", si->si_addr, signal);
-    if (walking_range_.begin != 0U) {
-      MEM_ALOGW("while walking range %p-%p", reinterpret_cast<void*>(walking_range_.begin),
-                reinterpret_cast<void*>(walking_range_.end));
-    }
-    segv_logged_ = true;
-  }
-  segv_page_count_++;
-  if (!MapOverPage(si->si_addr)) {
-    handler.reset();
-  }
-}
-
-Allocator<ScopedSignalHandler::SignalFnMap>::unique_ptr ScopedSignalHandler::handler_map_;
-
-}  // namespace android
diff --git a/libmemunreachable/HeapWalker.h b/libmemunreachable/HeapWalker.h
deleted file mode 100644
index f00bcca..0000000
--- a/libmemunreachable/HeapWalker.h
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_HEAP_WALKER_H_
-#define LIBMEMUNREACHABLE_HEAP_WALKER_H_
-
-#include <signal.h>
-
-#include "android-base/macros.h"
-
-#include "Allocator.h"
-#include "ScopedSignalHandler.h"
-#include "Tarjan.h"
-
-namespace android {
-
-// A range [begin, end)
-struct Range {
-  uintptr_t begin;
-  uintptr_t end;
-
-  size_t size() const { return end - begin; };
-  bool operator==(const Range& other) const {
-    return this->begin == other.begin && this->end == other.end;
-  }
-  bool operator!=(const Range& other) const { return !(*this == other); }
-};
-
-// Comparator for Ranges that returns equivalence for overlapping ranges
-struct compare_range {
-  bool operator()(const Range& a, const Range& b) const { return a.end <= b.begin; }
-};
-
-class HeapWalker {
- public:
-  explicit HeapWalker(Allocator<HeapWalker> allocator)
-      : allocator_(allocator),
-        allocations_(allocator),
-        allocation_bytes_(0),
-        roots_(allocator),
-        root_vals_(allocator),
-        sigsegv_handler_(allocator),
-        sigbus_handler_(allocator),
-        walking_ptr_(0),
-        walking_range_{0, 0},
-        segv_logged_(false),
-        segv_page_count_(0) {
-    valid_allocations_range_.end = 0;
-    valid_allocations_range_.begin = ~valid_allocations_range_.end;
-    valid_mappings_range_.end = 0;
-    valid_mappings_range_.begin = ~valid_allocations_range_.end;
-
-    sigsegv_handler_.install(
-        SIGSEGV, [=](ScopedSignalHandler& handler, int signal, siginfo_t* siginfo, void* uctx) {
-          this->HandleSegFault(handler, signal, siginfo, uctx);
-        });
-    sigbus_handler_.install(
-        SIGBUS, [=](ScopedSignalHandler& handler, int signal, siginfo_t* siginfo, void* uctx) {
-          this->HandleSegFault(handler, signal, siginfo, uctx);
-        });
-  }
-
-  ~HeapWalker() {}
-  bool Allocation(uintptr_t begin, uintptr_t end);
-  void Mapping(uintptr_t begin, uintptr_t end);
-  void Root(uintptr_t begin, uintptr_t end);
-  void Root(const allocator::vector<uintptr_t>& vals);
-
-  bool DetectLeaks();
-
-  bool Leaked(allocator::vector<Range>&, size_t limit, size_t* num_leaks, size_t* leak_bytes);
-  size_t Allocations();
-  size_t AllocationBytes();
-
-  template <class F>
-  void ForEachPtrInRange(const Range& range, F&& f);
-
-  template <class F>
-  void ForEachAllocation(F&& f);
-
-  struct AllocationInfo {
-    bool referenced_from_root;
-  };
-
- private:
-  void RecurseRoot(const Range& root);
-  bool WordContainsAllocationPtr(uintptr_t ptr, Range* range, AllocationInfo** info);
-  void HandleSegFault(ScopedSignalHandler&, int, siginfo_t*, void*);
-
-  DISALLOW_COPY_AND_ASSIGN(HeapWalker);
-  Allocator<HeapWalker> allocator_;
-  using AllocationMap = allocator::map<Range, AllocationInfo, compare_range>;
-  AllocationMap allocations_;
-  size_t allocation_bytes_;
-  Range valid_allocations_range_;
-  Range valid_mappings_range_;
-
-  allocator::vector<Range> roots_;
-  allocator::vector<uintptr_t> root_vals_;
-
-  ScopedSignalHandler sigsegv_handler_;
-  ScopedSignalHandler sigbus_handler_;
-  volatile uintptr_t walking_ptr_;
-  Range walking_range_;
-  bool segv_logged_;
-  size_t segv_page_count_;
-};
-
-template <class F>
-inline void HeapWalker::ForEachPtrInRange(const Range& range, F&& f) {
-  uintptr_t begin = (range.begin + (sizeof(uintptr_t) - 1)) & ~(sizeof(uintptr_t) - 1);
-  // TODO(ccross): we might need to consider a pointer to the end of a buffer
-  // to be inside the buffer, which means the common case of a pointer to the
-  // beginning of a buffer may keep two ranges live.
-  for (uintptr_t i = begin; i < range.end; i += sizeof(uintptr_t)) {
-    Range ref_range;
-    AllocationInfo* ref_info;
-    if (WordContainsAllocationPtr(i, &ref_range, &ref_info)) {
-      f(ref_range, ref_info);
-    }
-  }
-}
-
-template <class F>
-inline void HeapWalker::ForEachAllocation(F&& f) {
-  for (auto& it : allocations_) {
-    const Range& range = it.first;
-    HeapWalker::AllocationInfo& allocation = it.second;
-    f(range, allocation);
-  }
-}
-
-}  // namespace android
-
-#endif
diff --git a/libmemunreachable/Leak.h b/libmemunreachable/Leak.h
deleted file mode 100644
index de64b64..0000000
--- a/libmemunreachable/Leak.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_LEAK_H_
-#define LIBMEMUNREACHABLE_LEAK_H_
-
-#include <functional>
-#include <vector>
-
-#include "memunreachable/memunreachable.h"
-
-// Custom std::hash specialization so that Leak::Backtrace can be used
-// as a key in std::unordered_map.
-namespace std {
-
-template <>
-struct hash<android::Leak::Backtrace> {
-  std::size_t operator()(const android::Leak::Backtrace& key) const {
-    std::size_t seed = 0;
-
-    hash_combine(seed, key.num_frames);
-    for (size_t i = 0; i < key.num_frames; i++) {
-      hash_combine(seed, key.frames[i]);
-    }
-
-    return seed;
-  }
-
- private:
-  template <typename T>
-  inline void hash_combine(std::size_t& seed, const T& v) const {
-    std::hash<T> hasher;
-    seed ^= hasher(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
-  }
-};
-
-}  // namespace std
-
-namespace android {
-
-static bool operator==(const Leak::Backtrace& lhs, const Leak::Backtrace& rhs) {
-  return (lhs.num_frames == rhs.num_frames) &&
-         memcmp(lhs.frames, rhs.frames, lhs.num_frames * sizeof(lhs.frames[0])) == 0;
-}
-}
-
-#endif
diff --git a/libmemunreachable/LeakFolding.cpp b/libmemunreachable/LeakFolding.cpp
deleted file mode 100644
index 074dc48..0000000
--- a/libmemunreachable/LeakFolding.cpp
+++ /dev/null
@@ -1,138 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <inttypes.h>
-
-#include "Allocator.h"
-#include "HeapWalker.h"
-#include "LeakFolding.h"
-#include "Tarjan.h"
-#include "log.h"
-
-namespace android {
-
-// Converts possibly cyclic graph of leaks to a DAG by combining
-// strongly-connected components into a object, stored in the scc pointer
-// of each node in the component.
-void LeakFolding::ComputeDAG() {
-  SCCList<LeakInfo> scc_list{allocator_};
-  Tarjan(leak_graph_, scc_list);
-
-  Allocator<SCCInfo> scc_allocator = allocator_;
-
-  for (auto& scc_nodes : scc_list) {
-    Allocator<SCCInfo>::unique_ptr leak_scc;
-    leak_scc = scc_allocator.make_unique(scc_allocator);
-
-    for (auto& node : scc_nodes) {
-      node->ptr->scc = leak_scc.get();
-      leak_scc->count++;
-      leak_scc->size += node->ptr->range.size();
-    }
-
-    leak_scc_.emplace_back(std::move(leak_scc));
-  }
-
-  for (auto& it : leak_map_) {
-    LeakInfo& leak = it.second;
-    for (auto& ref : leak.node.references_out) {
-      if (leak.scc != ref->ptr->scc) {
-        leak.scc->node.Edge(&ref->ptr->scc->node);
-      }
-    }
-  }
-}
-
-void LeakFolding::AccumulateLeaks(SCCInfo* dominator) {
-  std::function<void(SCCInfo*)> walk([&](SCCInfo* scc) {
-    if (scc->accumulator != dominator) {
-      scc->accumulator = dominator;
-      dominator->cuumulative_size += scc->size;
-      dominator->cuumulative_count += scc->count;
-      scc->node.Foreach([&](SCCInfo* ref) { walk(ref); });
-    }
-  });
-  walk(dominator);
-}
-
-bool LeakFolding::FoldLeaks() {
-  Allocator<LeakInfo> leak_allocator = allocator_;
-
-  // Find all leaked allocations insert them into leak_map_ and leak_graph_
-  heap_walker_.ForEachAllocation([&](const Range& range, HeapWalker::AllocationInfo& allocation) {
-    if (!allocation.referenced_from_root) {
-      auto it = leak_map_.emplace(std::piecewise_construct, std::forward_as_tuple(range),
-                                  std::forward_as_tuple(range, allocator_));
-      LeakInfo& leak = it.first->second;
-      leak_graph_.push_back(&leak.node);
-    }
-  });
-
-  // Find references between leaked allocations and connect them in leak_graph_
-  for (auto& it : leak_map_) {
-    LeakInfo& leak = it.second;
-    heap_walker_.ForEachPtrInRange(leak.range,
-                                   [&](Range& ptr_range, HeapWalker::AllocationInfo* ptr_info) {
-                                     if (!ptr_info->referenced_from_root) {
-                                       LeakInfo* ptr_leak = &leak_map_.at(ptr_range);
-                                       leak.node.Edge(&ptr_leak->node);
-                                     }
-                                   });
-  }
-
-  // Convert the cyclic graph to a DAG by grouping strongly connected components
-  ComputeDAG();
-
-  // Compute dominators and cuumulative sizes
-  for (auto& scc : leak_scc_) {
-    if (scc->node.references_in.size() == 0) {
-      scc->dominator = true;
-      AccumulateLeaks(scc.get());
-    }
-  }
-
-  return true;
-}
-
-bool LeakFolding::Leaked(allocator::vector<LeakFolding::Leak>& leaked, size_t* num_leaks_out,
-                         size_t* leak_bytes_out) {
-  size_t num_leaks = 0;
-  size_t leak_bytes = 0;
-  for (auto& it : leak_map_) {
-    const LeakInfo& leak = it.second;
-    num_leaks++;
-    leak_bytes += leak.range.size();
-  }
-
-  for (auto& it : leak_map_) {
-    const LeakInfo& leak = it.second;
-    if (leak.scc->dominator) {
-      leaked.emplace_back(Leak{leak.range, leak.scc->cuumulative_count - 1,
-                               leak.scc->cuumulative_size - leak.range.size()});
-    }
-  }
-
-  if (num_leaks_out) {
-    *num_leaks_out = num_leaks;
-  }
-  if (leak_bytes_out) {
-    *leak_bytes_out = leak_bytes;
-  }
-
-  return true;
-}
-
-}  // namespace android
diff --git a/libmemunreachable/LeakFolding.h b/libmemunreachable/LeakFolding.h
deleted file mode 100644
index 09affac..0000000
--- a/libmemunreachable/LeakFolding.h
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_LEAK_FOLDING_H_
-#define LIBMEMUNREACHABLE_LEAK_FOLDING_H_
-
-#include "HeapWalker.h"
-
-namespace android {
-
-class LeakFolding {
- public:
-  LeakFolding(Allocator<void> allocator, HeapWalker& heap_walker)
-      : allocator_(allocator),
-        heap_walker_(heap_walker),
-        leak_map_(allocator),
-        leak_graph_(allocator),
-        leak_scc_(allocator) {}
-
-  bool FoldLeaks();
-
-  struct Leak {
-    const Range range;
-    size_t referenced_count;
-    size_t referenced_size;
-  };
-
-  bool Leaked(allocator::vector<Leak>& leaked, size_t* num_leaks_out, size_t* leak_bytes_out);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(LeakFolding);
-  Allocator<void> allocator_;
-  HeapWalker& heap_walker_;
-
-  struct SCCInfo {
-   public:
-    Node<SCCInfo> node;
-
-    size_t count;
-    size_t size;
-
-    size_t cuumulative_count;
-    size_t cuumulative_size;
-
-    bool dominator;
-    SCCInfo* accumulator;
-
-    explicit SCCInfo(Allocator<SCCInfo> allocator)
-        : node(this, allocator),
-          count(0),
-          size(0),
-          cuumulative_count(0),
-          cuumulative_size(0),
-          dominator(false),
-          accumulator(nullptr) {}
-
-   private:
-    SCCInfo(SCCInfo&&) = delete;
-    DISALLOW_COPY_AND_ASSIGN(SCCInfo);
-  };
-
-  struct LeakInfo {
-   public:
-    Node<LeakInfo> node;
-
-    const Range range;
-
-    SCCInfo* scc;
-
-    LeakInfo(const Range& range, Allocator<LeakInfo> allocator)
-        : node(this, allocator), range(range), scc(nullptr) {}
-
-   private:
-    DISALLOW_COPY_AND_ASSIGN(LeakInfo);
-  };
-
-  void ComputeDAG();
-  void AccumulateLeaks(SCCInfo* dominator);
-
-  allocator::map<Range, LeakInfo, compare_range> leak_map_;
-  Graph<LeakInfo> leak_graph_;
-  allocator::vector<Allocator<SCCInfo>::unique_ptr> leak_scc_;
-};
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_LEAK_FOLDING_H_
diff --git a/libmemunreachable/LeakPipe.cpp b/libmemunreachable/LeakPipe.cpp
deleted file mode 100644
index 8ea9ad6..0000000
--- a/libmemunreachable/LeakPipe.cpp
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <string.h>
-
-#include "LeakPipe.h"
-
-#include "log.h"
-
-namespace android {
-
-bool LeakPipe::SendFd(int sock, int fd) {
-  struct msghdr hdr {};
-  struct iovec iov {};
-  unsigned int data = 0xfdfdfdfd;
-  alignas(struct cmsghdr) char cmsgbuf[CMSG_SPACE(sizeof(int))];
-
-  hdr.msg_iov = &iov;
-  hdr.msg_iovlen = 1;
-  iov.iov_base = &data;
-  iov.iov_len = sizeof(data);
-
-  hdr.msg_control = cmsgbuf;
-  hdr.msg_controllen = CMSG_LEN(sizeof(int));
-
-  struct cmsghdr* cmsg = CMSG_FIRSTHDR(&hdr);
-  cmsg->cmsg_len = CMSG_LEN(sizeof(int));
-  cmsg->cmsg_level = SOL_SOCKET;
-  cmsg->cmsg_type = SCM_RIGHTS;
-
-  *(int*)CMSG_DATA(cmsg) = fd;
-
-  int ret = sendmsg(sock, &hdr, 0);
-  if (ret < 0) {
-    MEM_ALOGE("failed to send fd: %s", strerror(errno));
-    return false;
-  }
-  if (ret == 0) {
-    MEM_ALOGE("eof when sending fd");
-    return false;
-  }
-
-  return true;
-}
-
-int LeakPipe::ReceiveFd(int sock) {
-  struct msghdr hdr {};
-  struct iovec iov {};
-  unsigned int data;
-  alignas(struct cmsghdr) char cmsgbuf[CMSG_SPACE(sizeof(int))];
-
-  hdr.msg_iov = &iov;
-  hdr.msg_iovlen = 1;
-  iov.iov_base = &data;
-  iov.iov_len = sizeof(data);
-
-  hdr.msg_control = cmsgbuf;
-  hdr.msg_controllen = CMSG_LEN(sizeof(int));
-
-  int ret = recvmsg(sock, &hdr, 0);
-  if (ret < 0) {
-    MEM_ALOGE("failed to receive fd: %s", strerror(errno));
-    return -1;
-  }
-  if (ret == 0) {
-    MEM_ALOGE("eof when receiving fd");
-    return -1;
-  }
-
-  struct cmsghdr* cmsg = CMSG_FIRSTHDR(&hdr);
-  if (cmsg == NULL || cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) {
-    MEM_ALOGE("missing fd while receiving fd");
-    return -1;
-  }
-
-  return *(int*)CMSG_DATA(cmsg);
-}
-
-}  // namespace android
diff --git a/libmemunreachable/LeakPipe.h b/libmemunreachable/LeakPipe.h
deleted file mode 100644
index 94d4aa4..0000000
--- a/libmemunreachable/LeakPipe.h
+++ /dev/null
@@ -1,194 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_LEAK_PIPE_H_
-#define LIBMEMUNREACHABLE_LEAK_PIPE_H_
-
-#include <sys/socket.h>
-
-#include <vector>
-
-#include "android-base/macros.h"
-
-#include "ScopedPipe.h"
-#include "log.h"
-
-namespace android {
-
-// LeakPipe implements a pipe that can transfer vectors of simple objects
-// between processes.  The pipe is created in the sending process and
-// transferred over a socketpair that was created before forking.  This ensures
-// that only the sending process can have the send side of the pipe open, so if
-// the sending process dies the pipe will close.
-class LeakPipe {
- public:
-  LeakPipe() {
-    int ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, sv_);
-    if (ret < 0) {
-      MEM_LOG_ALWAYS_FATAL("failed to create socketpair: %s", strerror(errno));
-    }
-  }
-
-  ~LeakPipe() { Close(); }
-
-  void Close() {
-    close(sv_[0]);
-    close(sv_[1]);
-    sv_[0] = -1;
-    sv_[1] = -1;
-  }
-
-  bool OpenReceiver() {
-    int fd = ReceiveFd(sv_[0]);
-    if (fd < 0) {
-      return false;
-    }
-
-    receiver_.SetFd(fd);
-    return true;
-  }
-
-  bool OpenSender() {
-    ScopedPipe pipe;
-
-    if (!SendFd(sv_[1], pipe.Receiver())) {
-      return false;
-    }
-    pipe.ReleaseReceiver();
-
-    sender_.SetFd(pipe.ReleaseSender());
-    return true;
-  }
-
-  class LeakPipeBase {
-   public:
-    LeakPipeBase() : fd_(-1) {}
-
-    ~LeakPipeBase() { Close(); }
-
-    void SetFd(int fd) { fd_ = fd; }
-
-    void Close() {
-      close(fd_);
-      fd_ = -1;
-    }
-
-   protected:
-    int fd_;
-
-   private:
-    DISALLOW_COPY_AND_ASSIGN(LeakPipeBase);
-  };
-
-  class LeakPipeSender : public LeakPipeBase {
-   public:
-    using LeakPipeBase::LeakPipeBase;
-
-    template <typename T>
-    bool Send(const T& value) {
-      ssize_t ret = TEMP_FAILURE_RETRY(write(fd_, &value, sizeof(T)));
-      if (ret < 0) {
-        MEM_ALOGE("failed to send value: %s", strerror(errno));
-        return false;
-      } else if (static_cast<size_t>(ret) != sizeof(T)) {
-        MEM_ALOGE("eof while writing value");
-        return false;
-      }
-
-      return true;
-    }
-
-    template <class T, class Alloc = std::allocator<T>>
-    bool SendVector(const std::vector<T, Alloc>& vector) {
-      size_t size = vector.size() * sizeof(T);
-      if (!Send(size)) {
-        return false;
-      }
-
-      ssize_t ret = TEMP_FAILURE_RETRY(write(fd_, vector.data(), size));
-      if (ret < 0) {
-        MEM_ALOGE("failed to send vector: %s", strerror(errno));
-        return false;
-      } else if (static_cast<size_t>(ret) != size) {
-        MEM_ALOGE("eof while writing vector");
-        return false;
-      }
-
-      return true;
-    }
-  };
-
-  class LeakPipeReceiver : public LeakPipeBase {
-   public:
-    using LeakPipeBase::LeakPipeBase;
-
-    template <typename T>
-    bool Receive(T* value) {
-      ssize_t ret = TEMP_FAILURE_RETRY(read(fd_, reinterpret_cast<void*>(value), sizeof(T)));
-      if (ret < 0) {
-        MEM_ALOGE("failed to receive value: %s", strerror(errno));
-        return false;
-      } else if (static_cast<size_t>(ret) != sizeof(T)) {
-        MEM_ALOGE("eof while receiving value");
-        return false;
-      }
-
-      return true;
-    }
-
-    template <class T, class Alloc = std::allocator<T>>
-    bool ReceiveVector(std::vector<T, Alloc>& vector) {
-      size_t size = 0;
-      if (!Receive(&size)) {
-        return false;
-      }
-
-      vector.resize(size / sizeof(T));
-
-      char* ptr = reinterpret_cast<char*>(vector.data());
-      while (size > 0) {
-        ssize_t ret = TEMP_FAILURE_RETRY(read(fd_, ptr, size));
-        if (ret < 0) {
-          MEM_ALOGE("failed to send vector: %s", strerror(errno));
-          return false;
-        } else if (ret == 0) {
-          MEM_ALOGE("eof while reading vector");
-          return false;
-        }
-        size -= ret;
-        ptr += ret;
-      }
-
-      return true;
-    }
-  };
-
-  LeakPipeReceiver& Receiver() { return receiver_; }
-
-  LeakPipeSender& Sender() { return sender_; }
-
- private:
-  LeakPipeReceiver receiver_;
-  LeakPipeSender sender_;
-  bool SendFd(int sock, int fd);
-  int ReceiveFd(int sock);
-  DISALLOW_COPY_AND_ASSIGN(LeakPipe);
-  int sv_[2];
-};
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_LEAK_PIPE_H_
diff --git a/libmemunreachable/LinkedList.h b/libmemunreachable/LinkedList.h
deleted file mode 100644
index 36fe9fd..0000000
--- a/libmemunreachable/LinkedList.h
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_LINKED_LIST_H_
-#define LIBMEMUNREACHABLE_LINKED_LIST_H_
-
-namespace android {
-
-template <class T>
-class LinkedList {
- public:
-  LinkedList() : next_(this), prev_(this), data_() {}
-  explicit LinkedList(T data) : LinkedList() { data_ = data; }
-  ~LinkedList() {}
-  void insert(LinkedList<T>& node) {
-    assert(node.empty());
-    node.next_ = this->next_;
-    node.next_->prev_ = &node;
-    this->next_ = &node;
-    node.prev_ = this;
-  }
-  void remove() {
-    this->next_->prev_ = this->prev_;
-    this->prev_->next_ = this->next_;
-    this->next_ = this;
-    this->prev_ = this;
-  }
-  T data() { return data_; }
-  bool empty() { return next_ == this && prev_ == this; }
-  LinkedList<T>* next() { return next_; }
-
- private:
-  LinkedList<T>* next_;
-  LinkedList<T>* prev_;
-  T data_;
-};
-
-template <class T>
-class LinkedListHead {
- public:
-  LinkedListHead() : node_() {}
-  ~LinkedListHead() {}
-
- private:
-  LinkedList<T> node_;
-};
-
-}  // namespace android
-
-#endif
diff --git a/libmemunreachable/MemUnreachable.cpp b/libmemunreachable/MemUnreachable.cpp
deleted file mode 100644
index ce937fd..0000000
--- a/libmemunreachable/MemUnreachable.cpp
+++ /dev/null
@@ -1,562 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <inttypes.h>
-#include <string.h>
-
-#include <functional>
-#include <iomanip>
-#include <mutex>
-#include <sstream>
-#include <string>
-#include <unordered_map>
-
-#include <android-base/macros.h>
-#include <backtrace.h>
-
-#include "Allocator.h"
-#include "Binder.h"
-#include "HeapWalker.h"
-#include "Leak.h"
-#include "LeakFolding.h"
-#include "LeakPipe.h"
-#include "ProcessMappings.h"
-#include "PtracerThread.h"
-#include "ScopedDisableMalloc.h"
-#include "Semaphore.h"
-#include "ThreadCapture.h"
-
-#include "bionic.h"
-#include "log.h"
-#include "memunreachable/memunreachable.h"
-
-using namespace std::chrono_literals;
-
-namespace android {
-
-const size_t Leak::contents_length;
-
-class MemUnreachable {
- public:
-  MemUnreachable(pid_t pid, Allocator<void> allocator)
-      : pid_(pid), allocator_(allocator), heap_walker_(allocator_) {}
-  bool CollectAllocations(const allocator::vector<ThreadInfo>& threads,
-                          const allocator::vector<Mapping>& mappings,
-                          const allocator::vector<uintptr_t>& refs);
-  bool GetUnreachableMemory(allocator::vector<Leak>& leaks, size_t limit, size_t* num_leaks,
-                            size_t* leak_bytes);
-  size_t Allocations() { return heap_walker_.Allocations(); }
-  size_t AllocationBytes() { return heap_walker_.AllocationBytes(); }
-
- private:
-  bool ClassifyMappings(const allocator::vector<Mapping>& mappings,
-                        allocator::vector<Mapping>& heap_mappings,
-                        allocator::vector<Mapping>& anon_mappings,
-                        allocator::vector<Mapping>& globals_mappings,
-                        allocator::vector<Mapping>& stack_mappings);
-  DISALLOW_COPY_AND_ASSIGN(MemUnreachable);
-  pid_t pid_;
-  Allocator<void> allocator_;
-  HeapWalker heap_walker_;
-};
-
-static void HeapIterate(const Mapping& heap_mapping,
-                        const std::function<void(uintptr_t, size_t)>& func) {
-  malloc_iterate(heap_mapping.begin, heap_mapping.end - heap_mapping.begin,
-                 [](uintptr_t base, size_t size, void* arg) {
-                   auto f = reinterpret_cast<const std::function<void(uintptr_t, size_t)>*>(arg);
-                   (*f)(base, size);
-                 },
-                 const_cast<void*>(reinterpret_cast<const void*>(&func)));
-}
-
-bool MemUnreachable::CollectAllocations(const allocator::vector<ThreadInfo>& threads,
-                                        const allocator::vector<Mapping>& mappings,
-                                        const allocator::vector<uintptr_t>& refs) {
-  MEM_ALOGI("searching process %d for allocations", pid_);
-
-  for (auto it = mappings.begin(); it != mappings.end(); it++) {
-    heap_walker_.Mapping(it->begin, it->end);
-  }
-
-  allocator::vector<Mapping> heap_mappings{mappings};
-  allocator::vector<Mapping> anon_mappings{mappings};
-  allocator::vector<Mapping> globals_mappings{mappings};
-  allocator::vector<Mapping> stack_mappings{mappings};
-  if (!ClassifyMappings(mappings, heap_mappings, anon_mappings, globals_mappings, stack_mappings)) {
-    return false;
-  }
-
-  for (auto it = heap_mappings.begin(); it != heap_mappings.end(); it++) {
-    MEM_ALOGV("Heap mapping %" PRIxPTR "-%" PRIxPTR " %s", it->begin, it->end, it->name);
-    HeapIterate(*it,
-                [&](uintptr_t base, size_t size) { heap_walker_.Allocation(base, base + size); });
-  }
-
-  for (auto it = anon_mappings.begin(); it != anon_mappings.end(); it++) {
-    MEM_ALOGV("Anon mapping %" PRIxPTR "-%" PRIxPTR " %s", it->begin, it->end, it->name);
-    heap_walker_.Allocation(it->begin, it->end);
-  }
-
-  for (auto it = globals_mappings.begin(); it != globals_mappings.end(); it++) {
-    MEM_ALOGV("Globals mapping %" PRIxPTR "-%" PRIxPTR " %s", it->begin, it->end, it->name);
-    heap_walker_.Root(it->begin, it->end);
-  }
-
-  for (auto thread_it = threads.begin(); thread_it != threads.end(); thread_it++) {
-    for (auto it = stack_mappings.begin(); it != stack_mappings.end(); it++) {
-      if (thread_it->stack.first >= it->begin && thread_it->stack.first <= it->end) {
-        MEM_ALOGV("Stack %" PRIxPTR "-%" PRIxPTR " %s", thread_it->stack.first, it->end, it->name);
-        heap_walker_.Root(thread_it->stack.first, it->end);
-      }
-    }
-    heap_walker_.Root(thread_it->regs);
-  }
-
-  heap_walker_.Root(refs);
-
-  MEM_ALOGI("searching done");
-
-  return true;
-}
-
-bool MemUnreachable::GetUnreachableMemory(allocator::vector<Leak>& leaks, size_t limit,
-                                          size_t* num_leaks, size_t* leak_bytes) {
-  MEM_ALOGI("sweeping process %d for unreachable memory", pid_);
-  leaks.clear();
-
-  if (!heap_walker_.DetectLeaks()) {
-    return false;
-  }
-
-  allocator::vector<Range> leaked1{allocator_};
-  heap_walker_.Leaked(leaked1, 0, num_leaks, leak_bytes);
-
-  MEM_ALOGI("sweeping done");
-
-  MEM_ALOGI("folding related leaks");
-
-  LeakFolding folding(allocator_, heap_walker_);
-  if (!folding.FoldLeaks()) {
-    return false;
-  }
-
-  allocator::vector<LeakFolding::Leak> leaked{allocator_};
-
-  if (!folding.Leaked(leaked, num_leaks, leak_bytes)) {
-    return false;
-  }
-
-  allocator::unordered_map<Leak::Backtrace, Leak*> backtrace_map{allocator_};
-
-  // Prevent reallocations of backing memory so we can store pointers into it
-  // in backtrace_map.
-  leaks.reserve(leaked.size());
-
-  for (auto& it : leaked) {
-    leaks.emplace_back();
-    Leak* leak = &leaks.back();
-
-    ssize_t num_backtrace_frames = malloc_backtrace(
-        reinterpret_cast<void*>(it.range.begin), leak->backtrace.frames, leak->backtrace.max_frames);
-    if (num_backtrace_frames > 0) {
-      leak->backtrace.num_frames = num_backtrace_frames;
-
-      auto inserted = backtrace_map.emplace(leak->backtrace, leak);
-      if (!inserted.second) {
-        // Leak with same backtrace already exists, drop this one and
-        // increment similar counts on the existing one.
-        leaks.pop_back();
-        Leak* similar_leak = inserted.first->second;
-        similar_leak->similar_count++;
-        similar_leak->similar_size += it.range.size();
-        similar_leak->similar_referenced_count += it.referenced_count;
-        similar_leak->similar_referenced_size += it.referenced_size;
-        similar_leak->total_size += it.range.size();
-        similar_leak->total_size += it.referenced_size;
-        continue;
-      }
-    }
-
-    leak->begin = it.range.begin;
-    leak->size = it.range.size();
-    leak->referenced_count = it.referenced_count;
-    leak->referenced_size = it.referenced_size;
-    leak->total_size = leak->size + leak->referenced_size;
-    memcpy(leak->contents, reinterpret_cast<void*>(it.range.begin),
-           std::min(leak->size, Leak::contents_length));
-  }
-
-  MEM_ALOGI("folding done");
-
-  std::sort(leaks.begin(), leaks.end(),
-            [](const Leak& a, const Leak& b) { return a.total_size > b.total_size; });
-
-  if (leaks.size() > limit) {
-    leaks.resize(limit);
-  }
-
-  return true;
-}
-
-static bool has_prefix(const allocator::string& s, const char* prefix) {
-  int ret = s.compare(0, strlen(prefix), prefix);
-  return ret == 0;
-}
-
-static bool is_sanitizer_mapping(const allocator::string& s) {
-  return s == "[anon:low shadow]" || s == "[anon:high shadow]" || has_prefix(s, "[anon:hwasan");
-}
-
-bool MemUnreachable::ClassifyMappings(const allocator::vector<Mapping>& mappings,
-                                      allocator::vector<Mapping>& heap_mappings,
-                                      allocator::vector<Mapping>& anon_mappings,
-                                      allocator::vector<Mapping>& globals_mappings,
-                                      allocator::vector<Mapping>& stack_mappings) {
-  heap_mappings.clear();
-  anon_mappings.clear();
-  globals_mappings.clear();
-  stack_mappings.clear();
-
-  allocator::string current_lib{allocator_};
-
-  for (auto it = mappings.begin(); it != mappings.end(); it++) {
-    if (it->execute) {
-      current_lib = it->name;
-      continue;
-    }
-
-    if (!it->read) {
-      continue;
-    }
-
-    const allocator::string mapping_name{it->name, allocator_};
-    if (mapping_name == "[anon:.bss]") {
-      // named .bss section
-      globals_mappings.emplace_back(*it);
-    } else if (mapping_name == current_lib) {
-      // .rodata or .data section
-      globals_mappings.emplace_back(*it);
-    } else if (mapping_name == "[anon:libc_malloc]") {
-      // named malloc mapping
-      heap_mappings.emplace_back(*it);
-    } else if (has_prefix(mapping_name, "[anon:dalvik-")) {
-      // named dalvik heap mapping
-      globals_mappings.emplace_back(*it);
-    } else if (has_prefix(mapping_name, "[stack")) {
-      // named stack mapping
-      stack_mappings.emplace_back(*it);
-    } else if (mapping_name.size() == 0) {
-      globals_mappings.emplace_back(*it);
-    } else if (has_prefix(mapping_name, "[anon:") &&
-               mapping_name != "[anon:leak_detector_malloc]" &&
-               !is_sanitizer_mapping(mapping_name)) {
-      // TODO(ccross): it would be nice to treat named anonymous mappings as
-      // possible leaks, but naming something in a .bss or .data section makes
-      // it impossible to distinguish them from mmaped and then named mappings.
-      globals_mappings.emplace_back(*it);
-    }
-  }
-
-  return true;
-}
-
-template <typename T>
-static inline const char* plural(T val) {
-  return (val == 1) ? "" : "s";
-}
-
-bool GetUnreachableMemory(UnreachableMemoryInfo& info, size_t limit) {
-  if (info.version > 0) {
-    MEM_ALOGE("unsupported UnreachableMemoryInfo.version %zu in GetUnreachableMemory",
-              info.version);
-    return false;
-  }
-
-  int parent_pid = getpid();
-  int parent_tid = gettid();
-
-  Heap heap;
-
-  Semaphore continue_parent_sem;
-  LeakPipe pipe;
-
-  PtracerThread thread{[&]() -> int {
-    /////////////////////////////////////////////
-    // Collection thread
-    /////////////////////////////////////////////
-    MEM_ALOGI("collecting thread info for process %d...", parent_pid);
-
-    ThreadCapture thread_capture(parent_pid, heap);
-    allocator::vector<ThreadInfo> thread_info(heap);
-    allocator::vector<Mapping> mappings(heap);
-    allocator::vector<uintptr_t> refs(heap);
-
-    // ptrace all the threads
-    if (!thread_capture.CaptureThreads()) {
-      continue_parent_sem.Post();
-      return 1;
-    }
-
-    // collect register contents and stacks
-    if (!thread_capture.CapturedThreadInfo(thread_info)) {
-      continue_parent_sem.Post();
-      return 1;
-    }
-
-    // snapshot /proc/pid/maps
-    if (!ProcessMappings(parent_pid, mappings)) {
-      continue_parent_sem.Post();
-      return 1;
-    }
-
-    if (!BinderReferences(refs)) {
-      continue_parent_sem.Post();
-      return 1;
-    }
-
-    // malloc must be enabled to call fork, at_fork handlers take the same
-    // locks as ScopedDisableMalloc.  All threads are paused in ptrace, so
-    // memory state is still consistent.  Unfreeze the original thread so it
-    // can drop the malloc locks, it will block until the collection thread
-    // exits.
-    thread_capture.ReleaseThread(parent_tid);
-    continue_parent_sem.Post();
-
-    // fork a process to do the heap walking
-    int ret = fork();
-    if (ret < 0) {
-      return 1;
-    } else if (ret == 0) {
-      /////////////////////////////////////////////
-      // Heap walker process
-      /////////////////////////////////////////////
-      // Examine memory state in the child using the data collected above and
-      // the CoW snapshot of the process memory contents.
-
-      if (!pipe.OpenSender()) {
-        _exit(1);
-      }
-
-      MemUnreachable unreachable{parent_pid, heap};
-
-      if (!unreachable.CollectAllocations(thread_info, mappings, refs)) {
-        _exit(2);
-      }
-      size_t num_allocations = unreachable.Allocations();
-      size_t allocation_bytes = unreachable.AllocationBytes();
-
-      allocator::vector<Leak> leaks{heap};
-
-      size_t num_leaks = 0;
-      size_t leak_bytes = 0;
-      bool ok = unreachable.GetUnreachableMemory(leaks, limit, &num_leaks, &leak_bytes);
-
-      ok = ok && pipe.Sender().Send(num_allocations);
-      ok = ok && pipe.Sender().Send(allocation_bytes);
-      ok = ok && pipe.Sender().Send(num_leaks);
-      ok = ok && pipe.Sender().Send(leak_bytes);
-      ok = ok && pipe.Sender().SendVector(leaks);
-
-      if (!ok) {
-        _exit(3);
-      }
-
-      _exit(0);
-    } else {
-      // Nothing left to do in the collection thread, return immediately,
-      // releasing all the captured threads.
-      MEM_ALOGI("collection thread done");
-      return 0;
-    }
-  }};
-
-  /////////////////////////////////////////////
-  // Original thread
-  /////////////////////////////////////////////
-
-  {
-    // Disable malloc to get a consistent view of memory
-    ScopedDisableMalloc disable_malloc;
-
-    // Start the collection thread
-    thread.Start();
-
-    // Wait for the collection thread to signal that it is ready to fork the
-    // heap walker process.
-    continue_parent_sem.Wait(30s);
-
-    // Re-enable malloc so the collection thread can fork.
-  }
-
-  // Wait for the collection thread to exit
-  int ret = thread.Join();
-  if (ret != 0) {
-    return false;
-  }
-
-  // Get a pipe from the heap walker process.  Transferring a new pipe fd
-  // ensures no other forked processes can have it open, so when the heap
-  // walker process dies the remote side of the pipe will close.
-  if (!pipe.OpenReceiver()) {
-    return false;
-  }
-
-  bool ok = true;
-  ok = ok && pipe.Receiver().Receive(&info.num_allocations);
-  ok = ok && pipe.Receiver().Receive(&info.allocation_bytes);
-  ok = ok && pipe.Receiver().Receive(&info.num_leaks);
-  ok = ok && pipe.Receiver().Receive(&info.leak_bytes);
-  ok = ok && pipe.Receiver().ReceiveVector(info.leaks);
-  if (!ok) {
-    return false;
-  }
-
-  MEM_ALOGI("unreachable memory detection done");
-  MEM_ALOGE("%zu bytes in %zu allocation%s unreachable out of %zu bytes in %zu allocation%s",
-            info.leak_bytes, info.num_leaks, plural(info.num_leaks), info.allocation_bytes,
-            info.num_allocations, plural(info.num_allocations));
-  return true;
-}
-
-std::string Leak::ToString(bool log_contents) const {
-  std::ostringstream oss;
-
-  oss << "  " << std::dec << size;
-  oss << " bytes unreachable at ";
-  oss << std::hex << begin;
-  oss << std::endl;
-  if (referenced_count > 0) {
-    oss << std::dec;
-    oss << "   referencing " << referenced_size << " unreachable bytes";
-    oss << " in " << referenced_count << " allocation" << plural(referenced_count);
-    oss << std::endl;
-  }
-  if (similar_count > 0) {
-    oss << std::dec;
-    oss << "   and " << similar_size << " similar unreachable bytes";
-    oss << " in " << similar_count << " allocation" << plural(similar_count);
-    oss << std::endl;
-    if (similar_referenced_count > 0) {
-      oss << "   referencing " << similar_referenced_size << " unreachable bytes";
-      oss << " in " << similar_referenced_count << " allocation" << plural(similar_referenced_count);
-      oss << std::endl;
-    }
-  }
-
-  if (log_contents) {
-    const int bytes_per_line = 16;
-    const size_t bytes = std::min(size, contents_length);
-
-    if (bytes == size) {
-      oss << "   contents:" << std::endl;
-    } else {
-      oss << "   first " << bytes << " bytes of contents:" << std::endl;
-    }
-
-    for (size_t i = 0; i < bytes; i += bytes_per_line) {
-      oss << "   " << std::hex << begin + i << ": ";
-      size_t j;
-      oss << std::setfill('0');
-      for (j = i; j < bytes && j < i + bytes_per_line; j++) {
-        oss << std::setw(2) << static_cast<int>(contents[j]) << " ";
-      }
-      oss << std::setfill(' ');
-      for (; j < i + bytes_per_line; j++) {
-        oss << "   ";
-      }
-      for (j = i; j < bytes && j < i + bytes_per_line; j++) {
-        char c = contents[j];
-        if (c < ' ' || c >= 0x7f) {
-          c = '.';
-        }
-        oss << c;
-      }
-      oss << std::endl;
-    }
-  }
-  if (backtrace.num_frames > 0) {
-    oss << backtrace_string(backtrace.frames, backtrace.num_frames);
-  }
-
-  return oss.str();
-}
-
-std::string UnreachableMemoryInfo::ToString(bool log_contents) const {
-  std::ostringstream oss;
-  oss << "  " << leak_bytes << " bytes in ";
-  oss << num_leaks << " unreachable allocation" << plural(num_leaks);
-  oss << std::endl;
-  oss << "  ABI: '" ABI_STRING "'" << std::endl;
-  oss << std::endl;
-
-  for (auto it = leaks.begin(); it != leaks.end(); it++) {
-    oss << it->ToString(log_contents);
-    oss << std::endl;
-  }
-
-  return oss.str();
-}
-
-UnreachableMemoryInfo::~UnreachableMemoryInfo() {
-  // Clear the memory that holds the leaks, otherwise the next attempt to
-  // detect leaks may find the old data (for example in the jemalloc tcache)
-  // and consider all the leaks to be referenced.
-  memset(leaks.data(), 0, leaks.capacity() * sizeof(Leak));
-
-  std::vector<Leak> tmp;
-  leaks.swap(tmp);
-
-  // Disable and re-enable malloc to flush the jemalloc tcache to make sure
-  // there are no copies of the leaked pointer addresses there.
-  malloc_disable();
-  malloc_enable();
-}
-
-std::string GetUnreachableMemoryString(bool log_contents, size_t limit) {
-  UnreachableMemoryInfo info;
-  if (!GetUnreachableMemory(info, limit)) {
-    return "Failed to get unreachable memory\n"
-           "If you are trying to get unreachable memory from a system app\n"
-           "(like com.android.systemui), disable selinux first using\n"
-           "setenforce 0\n";
-  }
-
-  return info.ToString(log_contents);
-}
-
-}  // namespace android
-
-bool LogUnreachableMemory(bool log_contents, size_t limit) {
-  android::UnreachableMemoryInfo info;
-  if (!android::GetUnreachableMemory(info, limit)) {
-    return false;
-  }
-
-  for (auto it = info.leaks.begin(); it != info.leaks.end(); it++) {
-    MEM_ALOGE("%s", it->ToString(log_contents).c_str());
-  }
-  return true;
-}
-
-bool NoLeaks() {
-  android::UnreachableMemoryInfo info;
-  if (!android::GetUnreachableMemory(info, 0)) {
-    return false;
-  }
-
-  return info.num_leaks == 0;
-}
diff --git a/libmemunreachable/OWNERS b/libmemunreachable/OWNERS
deleted file mode 100644
index 9127a93..0000000
--- a/libmemunreachable/OWNERS
+++ /dev/null
@@ -1,2 +0,0 @@
-ccross@google.com
-cferris@google.com
diff --git a/libmemunreachable/ProcessMappings.cpp b/libmemunreachable/ProcessMappings.cpp
deleted file mode 100644
index 8e1be4c..0000000
--- a/libmemunreachable/ProcessMappings.cpp
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <string.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <android-base/unique_fd.h>
-#include <procinfo/process_map.h>
-
-#include "ProcessMappings.h"
-
-namespace android {
-
-struct ReadMapCallback {
-  ReadMapCallback(allocator::vector<Mapping>& mappings) : mappings_(mappings) {}
-
-  void operator()(uint64_t start, uint64_t end, uint16_t flags, uint64_t, ino_t,
-                  const char* name) const {
-    mappings_.emplace_back(start, end, flags & PROT_READ, flags & PROT_WRITE, flags & PROT_EXEC,
-                           name);
-  }
-
-  allocator::vector<Mapping>& mappings_;
-};
-
-bool ProcessMappings(pid_t pid, allocator::vector<Mapping>& mappings) {
-  char map_buffer[1024];
-  snprintf(map_buffer, sizeof(map_buffer), "/proc/%d/maps", pid);
-  android::base::unique_fd fd(open(map_buffer, O_RDONLY));
-  if (fd == -1) {
-    return false;
-  }
-  allocator::string content(mappings.get_allocator());
-  ssize_t n;
-  while ((n = TEMP_FAILURE_RETRY(read(fd, map_buffer, sizeof(map_buffer)))) > 0) {
-    content.append(map_buffer, n);
-  }
-  ReadMapCallback callback(mappings);
-  return android::procinfo::ReadMapFileContent(&content[0], callback);
-}
-
-}  // namespace android
diff --git a/libmemunreachable/ProcessMappings.h b/libmemunreachable/ProcessMappings.h
deleted file mode 100644
index 94da69b..0000000
--- a/libmemunreachable/ProcessMappings.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_PROCESS_MAPPING_H_
-#define LIBMEMUNREACHABLE_PROCESS_MAPPING_H_
-
-#include <string.h>
-
-#include "Allocator.h"
-
-namespace android {
-
-struct Mapping {
-  uintptr_t begin;
-  uintptr_t end;
-  bool read;
-  bool write;
-  bool execute;
-  char name[96];
-
-  Mapping() {}
-  Mapping(uintptr_t begin, uintptr_t end, bool read, bool write, bool execute, const char* name)
-      : begin(begin), end(end), read(read), write(write), execute(execute) {
-    strlcpy(this->name, name, sizeof(this->name));
-  }
-};
-
-// This function is not re-entrant since it uses a static buffer for
-// the line data.
-bool ProcessMappings(pid_t pid, allocator::vector<Mapping>& mappings);
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_PROCESS_MAPPING_H_
diff --git a/libmemunreachable/PtracerThread.cpp b/libmemunreachable/PtracerThread.cpp
deleted file mode 100644
index d2fca49..0000000
--- a/libmemunreachable/PtracerThread.cpp
+++ /dev/null
@@ -1,155 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <pthread.h>
-#include <sched.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <sys/prctl.h>
-#include <sys/syscall.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-#include "android-base/macros.h"
-
-#include "PtracerThread.h"
-#include "log.h"
-
-namespace android {
-
-class Stack {
- public:
-  explicit Stack(size_t size) : size_(size) {
-    int prot = PROT_READ | PROT_WRITE;
-    int flags = MAP_PRIVATE | MAP_ANONYMOUS;
-    page_size_ = sysconf(_SC_PAGE_SIZE);
-    size_ += page_size_ * 2;  // guard pages
-    base_ = mmap(NULL, size_, prot, flags, -1, 0);
-    if (base_ == MAP_FAILED) {
-      base_ = NULL;
-      size_ = 0;
-      return;
-    }
-    prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, base_, size_, "libmemunreachable stack");
-    mprotect(base_, page_size_, PROT_NONE);
-    mprotect(top(), page_size_, PROT_NONE);
-  };
-  ~Stack() { munmap(base_, size_); };
-  void* top() {
-    return reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(base_) + size_ - page_size_);
-  };
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(Stack);
-
-  void* base_;
-  size_t size_;
-  size_t page_size_;
-};
-
-PtracerThread::PtracerThread(const std::function<int()>& func) : child_pid_(0) {
-  stack_ = std::make_unique<Stack>(PTHREAD_STACK_MIN);
-  if (stack_->top() == nullptr) {
-    MEM_LOG_ALWAYS_FATAL("failed to mmap child stack: %s", strerror(errno));
-  }
-
-  func_ = std::function<int()>{[&, func]() -> int {
-    // In the child thread, lock and unlock the mutex to wait for the parent
-    // to finish setting up for the child thread
-    std::unique_lock<std::mutex> lk(m_);
-    lk.unlock();
-    _exit(func());
-  }};
-}
-
-PtracerThread::~PtracerThread() {
-  Kill();
-  Join();
-  ClearTracer();
-  stack_ = nullptr;
-}
-
-bool PtracerThread::Start() {
-  std::unique_lock<std::mutex> lk(m_);
-
-  // Convert from void(*)(void*) to lambda with captures
-  auto proxy = [](void* arg) -> int {
-    prctl(PR_SET_NAME, "libmemunreachable ptrace thread");
-    return (*reinterpret_cast<std::function<int()>*>(arg))();
-  };
-
-  // See README.md for why we create the child process this way
-  child_pid_ = clone(proxy, stack_->top(), CLONE_VM | CLONE_FS | CLONE_FILES /*|CLONE_UNTRACED*/,
-                     reinterpret_cast<void*>(&func_));
-  if (child_pid_ < 0) {
-    MEM_ALOGE("failed to clone child: %s", strerror(errno));
-    return false;
-  }
-
-  SetTracer(child_pid_);
-
-  lk.unlock();
-
-  return true;
-}
-
-int PtracerThread::Join() {
-  if (child_pid_ == -1) {
-    return -1;
-  }
-  int status;
-  int ret = TEMP_FAILURE_RETRY(waitpid(child_pid_, &status, __WALL));
-  if (ret < 0) {
-    MEM_ALOGE("waitpid %d failed: %s", child_pid_, strerror(errno));
-    return -1;
-  }
-
-  child_pid_ = -1;
-
-  if (WIFEXITED(status)) {
-    return WEXITSTATUS(status);
-  } else if (WIFSIGNALED(status)) {
-    return -WTERMSIG(status);
-  } else {
-    MEM_ALOGE("unexpected status %x", status);
-    return -1;
-  }
-}
-
-void PtracerThread::Kill() {
-  if (child_pid_ == -1) {
-    return;
-  }
-
-  syscall(SYS_tkill, child_pid_, SIGKILL);
-}
-
-void PtracerThread::SetTracer(pid_t tracer_pid) {
-  prctl(PR_SET_PTRACER, tracer_pid);
-}
-
-void PtracerThread::ClearTracer() {
-  prctl(PR_SET_PTRACER, 0);
-}
-
-}  // namespace android
diff --git a/libmemunreachable/PtracerThread.h b/libmemunreachable/PtracerThread.h
deleted file mode 100644
index 4f9c420..0000000
--- a/libmemunreachable/PtracerThread.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_PTRACER_THREAD_H_
-#define LIBMEMUNREACHABLE_PTRACER_THREAD_H_
-
-#include <functional>
-#include <mutex>
-
-#include "android-base/macros.h"
-
-#include "Allocator.h"
-
-namespace android {
-
-class Stack;
-
-// PtracerThread is similar to std::thread, except that it creates a "thread"
-// that can ptrace the other threads.  The thread is actually a separate
-// process, with its own thread group, but shares address space and fds with
-// the parent.
-class PtracerThread {
- public:
-  explicit PtracerThread(const std::function<int()>& func);
-  ~PtracerThread();
-  bool Start();
-  int Join();
-
- private:
-  void SetTracer(pid_t);
-  void ClearTracer();
-  void Kill();
-  DISALLOW_COPY_AND_ASSIGN(PtracerThread);
-  std::unique_ptr<Stack> stack_;
-  std::function<int()> func_;
-  std::mutex m_;
-  pid_t child_pid_;
-};
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_PTRACER_THREAD_H_
diff --git a/libmemunreachable/README.md b/libmemunreachable/README.md
deleted file mode 100644
index 9cc0c9b..0000000
--- a/libmemunreachable/README.md
+++ /dev/null
@@ -1,92 +0,0 @@
-libmemunreachable
-================
-
-Introduction
---------------
-libmemunreachable is a zero-overhead native memory leak detector.  It uses an imprecise mark-and-sweep garbage collector pass over all native memory, reporting any unreachable blocks as leaks.  It is similar to the [Heap Checker from tcmalloc](http://htmlpreview.github.io/?https://github.com/gperftools/gperftools/blob/master/doc/heap_checker.html), but with a few key differences to remove the overhead.  Instead of instrumenting every call to malloc and free, it queries the allocator (jemalloc) for active allocations when leak detection is requested.  In addition, it performs a very short stop-the-world data collection on the main process, and then forks a copy of the process to perform the mark-and-sweep, minimizing disruption to the original process.
-
-In the default (zero-overhead) mode, the returned data on leaks is limited to the address, approximate (upper bound) size, and the the first 32 bytes of the contents of the leaked allocation.  If malloc_debug backtraces are enabled they will be included in the leak information, but backtracing allocations requires significant overhead.
-
-----------
-
-Usage
--------
-
-### In Android apps ###
-
-libmemunreachble is loaded by zygote and can be triggered with `dumpsys -t 600 meminfo --unreachable [process]`.
-
-To enable malloc\_debug backtraces on allocations for a single app process on a userdebug device, use:
-```
-adb root
-adb shell setprop libc.debug.malloc.program app_process
-adb shell setprop wrap.[process] "\$\@"
-adb shell setprop libc.debug.malloc.options backtrace=4
-```
-
-Kill and restart the app, trigger the leak, and then run `dumpsys -t 600 meminfo --unreachable [process]`.
-
-To disable malloc\_debug:
-```
-adb shell setprop libc.debug.malloc.options "''"
-adb shell setprop libc.debug.malloc.program "''"
-adb shell setprop wrap.[process]  "''"
-```
-
-### C interface ###
-
-#### `bool LogUnreachableMemory(bool log_contents, size_t limit)` ####
-Writes a description of leaked memory to the log.  A summary is always written, followed by details of up to `limit` leaks.  If `log_contents` is `true`, details include up to 32 bytes of the contents of each leaked allocation.
-Returns true if leak detection succeeded.
-
-#### `bool NoLeaks()` ####
-Returns `true` if no unreachable memory was found.
-
-### C++ interface ###
-
-#### `bool GetUnreachableMemory(UnreachableMemoryInfo& info, size_t limit = 100)` ####
-Updates an `UnreachableMemoryInfo` object with information on leaks, including details on up to `limit` leaks.  Returns true if leak detection succeeded.
-
-#### `std::string GetUnreachableMemoryString(bool log_contents = false, size_t limit = 100)` ####
-Returns a description of leaked memory.  A summary is always written, followed by details of up to `limit` leaks.  If `log_contents` is `true`, details include up to 32 bytes of the contents of each leaked allocation.
-Returns true if leak detection succeeded.
-
-Implementation
--------------------
-The sequence of steps required to perform a leak detection pass is divided into three processes - the original process, the collection process, and the sweeper process.
-
- 1. *Original process*: Leak detection is requested by calling `GetUnreachableMemory()`
- 2. Allocations are disabled using `malloc_disable()`
- 3. The collection process is spawned.  The collection process, created using clone, is similar to a normal `fork()` child process, except that it shares the address space of the parent - any writes by the original process are visible to the collection process, and vice-versa. If we forked instead of using clone, the address space might get out of sync with observed post-ptrace thread state, since it takes some time to pause the parent.
- 4. *Collection process*: All threads in the original process are paused with `ptrace()`.
- 5. Registers contents, active stack areas, and memory mapping information are collected.
- 6. *Original process*: Allocations are re-enabled using `malloc_enable()`, but all threads are still paused with `ptrace()`.
- 7. *Collection process*: The sweeper process is spawned using a normal `fork()`.  The sweeper process has a copy of all memory from the original process, including all the data collected by the collection process.
- 8. Collection process releases all threads from `ptrace` and exits
- 9. *Original process*: All threads continue, the thread that called `GetUnreachableMemory()` blocks waiting for leak data over a pipe.
- 10. *Sweeper process*: A list of all active allocations is produced by examining the memory mappings and calling `malloc_iterate()` on any heap mappings.
- 11. A list of all roots is produced from globals (.data and .bss sections of binaries), and registers and stacks from each thread.
- 12. The mark-and-sweep pass is performed starting from roots.
- 13. Unmarked allocations are sent over the pipe back to the original process.
-
-----------
-
-
-Components
----------------
-- `MemUnreachable.cpp`: Entry points, implements the sequencing described above.
-- `PtracerThread.cpp`: Used to clone the collection process with shared address space.
-- `ThreadCapture.cpp`: Pauses threads in the main process and collects register contents.
-- `ProcessMappings.cpp`: Collects snapshots of `/proc/pid/maps`.
-- `HeapWalker.cpp`: Performs the mark-and-sweep pass over active allocations.
-- `LeakPipe.cpp`: transfers data describing leaks from the sweeper process to the original process.
-
-
-Heap allocator requirements
-----------------------------------
-libmemunreachable requires a small interface to the allocator in order to collect information about active allocations.
-
- - `malloc_disable()`: prevent any thread from mutating internal allocator state.
- - `malloc enable()`: re-enable allocations in all threads.
- - `malloc_iterate()`: call a callback on each active allocation in a given heap region.
- - `malloc_backtrace()`: return the backtrace from when the allocation at the given address was allocated, if it was collected.
diff --git a/libmemunreachable/ScopedAlarm.h b/libmemunreachable/ScopedAlarm.h
deleted file mode 100644
index bb50b9e..0000000
--- a/libmemunreachable/ScopedAlarm.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_SCOPED_ALARM_H_
-#define LIBMEMUNREACHABLE_SCOPED_ALARM_H_
-
-#include <signal.h>
-#include <sys/time.h>
-
-#include <chrono>
-#include <functional>
-
-namespace android {
-
-class ScopedAlarm {
- public:
-  ScopedAlarm(std::chrono::microseconds us, std::function<void()> func) {
-    func_ = func;
-    struct sigaction oldact {};
-    struct sigaction act {};
-    act.sa_handler = [](int) { ScopedAlarm::func_(); };
-    sigaction(SIGALRM, &act, &oldact);
-
-    std::chrono::seconds s = std::chrono::duration_cast<std::chrono::seconds>(us);
-    itimerval t = itimerval{};
-    t.it_value.tv_sec = s.count();
-    t.it_value.tv_usec = (us - s).count();
-    setitimer(ITIMER_REAL, &t, NULL);
-  }
-  ~ScopedAlarm() {
-    itimerval t = itimerval{};
-    setitimer(ITIMER_REAL, &t, NULL);
-    struct sigaction act {};
-    act.sa_handler = SIG_DFL;
-    sigaction(SIGALRM, &act, NULL);
-  }
-
- private:
-  static std::function<void()> func_;
-};
-
-}  // namespace android
-
-#endif
diff --git a/libmemunreachable/ScopedDisableMalloc.h b/libmemunreachable/ScopedDisableMalloc.h
deleted file mode 100644
index 655e826..0000000
--- a/libmemunreachable/ScopedDisableMalloc.h
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_SCOPED_DISABLE_MALLOC_H_
-#define LIBMEMUNREACHABLE_SCOPED_DISABLE_MALLOC_H_
-
-#include <memory>
-
-#include "android-base/macros.h"
-
-#include "ScopedAlarm.h"
-#include "bionic.h"
-#include "log.h"
-
-namespace android {
-
-class DisableMallocGuard {
- public:
-  DisableMallocGuard() : disabled_(false) {}
-  ~DisableMallocGuard() { Enable(); }
-
-  void Disable() {
-    if (!disabled_) {
-      malloc_disable();
-      disabled_ = true;
-    }
-  }
-
-  void Enable() {
-    if (disabled_) {
-      malloc_enable();
-      disabled_ = false;
-    }
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(DisableMallocGuard);
-  bool disabled_;
-};
-
-// Any calls to malloc or free from this thread will deadlock as long as this
-// object is in scope.  Calls to malloc from other threads may succeed (for
-// example if the allocation is satisfied out of the thread's tcache), or may
-// block until the object is destroyed.
-//
-// Don't call fork() while malloc is disabled, it needs the same locks held
-// here.
-class ScopedDisableMalloc {
- public:
-  ScopedDisableMalloc() { disable_malloc_.Disable(); }
-
-  ~ScopedDisableMalloc() { disable_malloc_.Enable(); }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ScopedDisableMalloc);
-  DisableMallocGuard disable_malloc_;
-};
-
-class ScopedDisableMallocTimeout {
- public:
-  explicit ScopedDisableMallocTimeout(
-      std::chrono::milliseconds timeout = std::chrono::milliseconds(2000))
-      : timeout_(timeout), timed_out_(false), disable_malloc_() {
-    Disable();
-  }
-
-  ~ScopedDisableMallocTimeout() { Enable(); }
-
-  bool timed_out() { return timed_out_; }
-
-  void Enable() {
-    disable_malloc_.Enable();
-    alarm_ = nullptr;
-  }
-
-  void Disable() {
-    // set up the alarm before disabling malloc so unique_ptr can be used
-    alarm_ = std::make_unique<ScopedAlarm>(timeout_, [&]() {
-      disable_malloc_.Enable();
-      timed_out_ = true;
-    });
-
-    disable_malloc_.Disable();
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ScopedDisableMallocTimeout);
-  std::chrono::milliseconds timeout_;
-  bool timed_out_;
-  std::unique_ptr<ScopedAlarm> alarm_;
-  DisableMallocGuard disable_malloc_;
-};
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_SCOPED_DISABLE_MALLOC_H_
diff --git a/libmemunreachable/ScopedPipe.h b/libmemunreachable/ScopedPipe.h
deleted file mode 100644
index b9dead5..0000000
--- a/libmemunreachable/ScopedPipe.h
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_SCOPED_PIPE_H_
-#define LIBMEMUNREACHABLE_SCOPED_PIPE_H_
-
-#include <unistd.h>
-
-#include "log.h"
-
-namespace android {
-
-class ScopedPipe {
- public:
-  ScopedPipe() : pipefd_{-1, -1} {
-    int ret = pipe2(pipefd_, O_CLOEXEC);
-    if (ret < 0) {
-      MEM_LOG_ALWAYS_FATAL("failed to open pipe");
-    }
-  }
-  ~ScopedPipe() { Close(); }
-
-  ScopedPipe(ScopedPipe&& other) noexcept {
-    SetReceiver(other.ReleaseReceiver());
-    SetSender(other.ReleaseSender());
-  }
-
-  ScopedPipe& operator=(ScopedPipe&& other) noexcept {
-    SetReceiver(other.ReleaseReceiver());
-    SetSender(other.ReleaseSender());
-    return *this;
-  }
-
-  void CloseReceiver() { close(ReleaseReceiver()); }
-
-  void CloseSender() { close(ReleaseSender()); }
-
-  void Close() {
-    CloseReceiver();
-    CloseSender();
-  }
-
-  int Receiver() { return pipefd_[0]; }
-  int Sender() { return pipefd_[1]; }
-
-  int ReleaseReceiver() {
-    int ret = Receiver();
-    SetReceiver(-1);
-    return ret;
-  }
-
-  int ReleaseSender() {
-    int ret = Sender();
-    SetSender(-1);
-    return ret;
-  }
-
- private:
-  void SetReceiver(int fd) { pipefd_[0] = fd; };
-  void SetSender(int fd) { pipefd_[1] = fd; };
-
-  int pipefd_[2];
-};
-
-}  // namespace android
-
-#endif
diff --git a/libmemunreachable/ScopedSignalHandler.h b/libmemunreachable/ScopedSignalHandler.h
deleted file mode 100644
index ef4473f..0000000
--- a/libmemunreachable/ScopedSignalHandler.h
+++ /dev/null
@@ -1,95 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_SCOPED_SIGNAL_HANDLER_H_
-#define LIBMEMUNREACHABLE_SCOPED_SIGNAL_HANDLER_H_
-
-#include <errno.h>
-#include <signal.h>
-
-#include <functional>
-
-#include "android-base/macros.h"
-
-#include "Allocator.h"
-#include "log.h"
-
-namespace android {
-
-class ScopedSignalHandler {
- public:
-  using Fn = std::function<void(ScopedSignalHandler&, int, siginfo_t*, void*)>;
-
-  explicit ScopedSignalHandler(Allocator<ScopedSignalHandler> allocator) : signal_(-1) {
-    if (handler_map_ == nullptr) {
-      Allocator<SignalFnMap> map_allocator = allocator;
-      handler_map_ = map_allocator.make_unique(allocator);
-    }
-  }
-  ~ScopedSignalHandler() { reset(); }
-
-  template <class F>
-  void install(int signal, F&& f) {
-    if (signal_ != -1) MEM_LOG_ALWAYS_FATAL("ScopedSignalHandler already installed");
-
-    if (handler_map_->find(signal) != handler_map_->end()) {
-      MEM_LOG_ALWAYS_FATAL("ScopedSignalHandler already installed for %d", signal);
-    }
-
-    (*handler_map_)[signal] =
-        SignalFn([=](int signal, siginfo_t* si, void* uctx) { f(*this, signal, si, uctx); });
-
-    struct sigaction act {};
-    act.sa_sigaction = [](int signal, siginfo_t* si, void* uctx) {
-      ((*handler_map_)[signal])(signal, si, uctx);
-    };
-    act.sa_flags = SA_SIGINFO;
-
-    int ret = sigaction(signal, &act, &old_act_);
-    if (ret < 0) {
-      MEM_LOG_ALWAYS_FATAL("failed to install segfault handler: %s", strerror(errno));
-    }
-
-    signal_ = signal;
-  }
-
-  void reset() {
-    if (signal_ != -1) {
-      int ret = sigaction(signal_, &old_act_, NULL);
-      if (ret < 0) {
-        MEM_ALOGE("failed to uninstall segfault handler");
-      }
-
-      handler_map_->erase(signal_);
-      if (handler_map_->empty()) {
-        handler_map_.reset();
-      }
-      signal_ = -1;
-    }
-  }
-
- private:
-  using SignalFn = std::function<void(int, siginfo_t*, void*)>;
-  using SignalFnMap = allocator::unordered_map<int, SignalFn>;
-  DISALLOW_COPY_AND_ASSIGN(ScopedSignalHandler);
-  int signal_;
-  struct sigaction old_act_;
-  static Allocator<SignalFnMap>::unique_ptr handler_map_;
-};
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_SCOPED_SIGNAL_HANDLER_H_
diff --git a/libmemunreachable/Semaphore.h b/libmemunreachable/Semaphore.h
deleted file mode 100644
index cd73972..0000000
--- a/libmemunreachable/Semaphore.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_SEMAPHORE_H_
-#define LIBMEMUNREACHABLE_SEMAPHORE_H_
-
-#include <chrono>
-#include <mutex>
-
-#include "android-base/macros.h"
-
-namespace android {
-
-class Semaphore {
- public:
-  explicit Semaphore(int count = 0) : count_(count) {}
-  ~Semaphore() = default;
-
-  void Wait(std::chrono::milliseconds ms) {
-    std::unique_lock<std::mutex> lk(m_);
-    cv_.wait_for(lk, ms, [&] {
-      if (count_ > 0) {
-        count_--;
-        return true;
-      }
-      return false;
-    });
-  }
-  void Post() {
-    {
-      std::lock_guard<std::mutex> lk(m_);
-      count_++;
-    }
-    cv_.notify_one();
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(Semaphore);
-
-  int count_;
-  std::mutex m_;
-  std::condition_variable cv_;
-};
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_SEMAPHORE_H_
diff --git a/libmemunreachable/Tarjan.h b/libmemunreachable/Tarjan.h
deleted file mode 100644
index f3ab652..0000000
--- a/libmemunreachable/Tarjan.h
+++ /dev/null
@@ -1,138 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-// Based on system/update_engine/payload_generator/tarjan.cc
-
-#ifndef LIBMEMUNREACHABLE_TARJAN_H_
-#define LIBMEMUNREACHABLE_TARJAN_H_
-
-#include <assert.h>
-#include <algorithm>
-
-#include "Allocator.h"
-
-namespace android {
-
-template <class T>
-class Node {
- public:
-  allocator::set<Node<T>*> references_in;
-  allocator::set<Node<T>*> references_out;
-  size_t index;
-  size_t lowlink;
-
-  T* ptr;
-
-  Node(T* ptr, Allocator<Node> allocator)
-      : references_in(allocator), references_out(allocator), ptr(ptr){};
-  Node(Node&& rhs) noexcept = default;
-  void Edge(Node<T>* ref) {
-    references_out.emplace(ref);
-    ref->references_in.emplace(this);
-  }
-  template <class F>
-  void Foreach(F&& f) {
-    for (auto& node : references_out) {
-      f(node->ptr);
-    }
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(Node<T>);
-};
-
-template <class T>
-using Graph = allocator::vector<Node<T>*>;
-
-template <class T>
-using SCC = allocator::vector<Node<T>*>;
-
-template <class T>
-using SCCList = allocator::vector<SCC<T>>;
-
-template <class T>
-class TarjanAlgorithm {
- public:
-  explicit TarjanAlgorithm(Allocator<void> allocator)
-      : index_(0), stack_(allocator), components_(allocator) {}
-
-  void Execute(Graph<T>& graph, SCCList<T>& out);
-
- private:
-  static constexpr size_t UNDEFINED_INDEX = static_cast<size_t>(-1);
-  void Tarjan(Node<T>* vertex, Graph<T>& graph);
-
-  size_t index_;
-  allocator::vector<Node<T>*> stack_;
-  SCCList<T> components_;
-};
-
-template <class T>
-void TarjanAlgorithm<T>::Execute(Graph<T>& graph, SCCList<T>& out) {
-  stack_.clear();
-  components_.clear();
-  index_ = 0;
-  for (auto& it : graph) {
-    it->index = UNDEFINED_INDEX;
-    it->lowlink = UNDEFINED_INDEX;
-  }
-
-  for (auto& it : graph) {
-    if (it->index == UNDEFINED_INDEX) {
-      Tarjan(it, graph);
-    }
-  }
-  out.swap(components_);
-}
-
-template <class T>
-void TarjanAlgorithm<T>::Tarjan(Node<T>* vertex, Graph<T>& graph) {
-  assert(vertex->index == UNDEFINED_INDEX);
-  vertex->index = index_;
-  vertex->lowlink = index_;
-  index_++;
-  stack_.push_back(vertex);
-  for (auto& it : vertex->references_out) {
-    Node<T>* vertex_next = it;
-    if (vertex_next->index == UNDEFINED_INDEX) {
-      Tarjan(vertex_next, graph);
-      vertex->lowlink = std::min(vertex->lowlink, vertex_next->lowlink);
-    } else if (std::find(stack_.begin(), stack_.end(), vertex_next) != stack_.end()) {
-      vertex->lowlink = std::min(vertex->lowlink, vertex_next->index);
-    }
-  }
-  if (vertex->lowlink == vertex->index) {
-    SCC<T> component{components_.get_allocator()};
-    Node<T>* other_vertex;
-    do {
-      other_vertex = stack_.back();
-      stack_.pop_back();
-      component.push_back(other_vertex);
-    } while (other_vertex != vertex && !stack_.empty());
-
-    components_.emplace_back(component);
-  }
-}
-
-template <class T>
-void Tarjan(Graph<T>& graph, SCCList<T>& out) {
-  TarjanAlgorithm<T> tarjan{graph.get_allocator()};
-  tarjan.Execute(graph, out);
-}
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_TARJAN_H_
diff --git a/libmemunreachable/ThreadCapture.cpp b/libmemunreachable/ThreadCapture.cpp
deleted file mode 100644
index 45eb55d..0000000
--- a/libmemunreachable/ThreadCapture.cpp
+++ /dev/null
@@ -1,367 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "ThreadCapture.h"
-
-#include <elf.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <limits.h>
-#include <stdlib.h>
-#include <sys/ptrace.h>
-#include <sys/stat.h>
-#include <sys/syscall.h>
-#include <sys/types.h>
-#include <sys/uio.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-#include <map>
-#include <memory>
-#include <set>
-#include <vector>
-
-#include <android-base/unique_fd.h>
-
-#include "Allocator.h"
-#include "log.h"
-
-namespace android {
-
-// bionic interfaces used:
-// atoi
-// strlcat
-// writev
-
-// bionic interfaces reimplemented to avoid allocation:
-// getdents64
-
-// Convert a pid > 0 to a string.  sprintf might allocate, so we can't use it.
-// Returns a pointer somewhere in buf to a null terminated string, or NULL
-// on error.
-static char* pid_to_str(char* buf, size_t len, pid_t pid) {
-  if (pid <= 0) {
-    return nullptr;
-  }
-
-  char* ptr = buf + len - 1;
-  *ptr = 0;
-  while (pid > 0) {
-    ptr--;
-    if (ptr < buf) {
-      return nullptr;
-    }
-    *ptr = '0' + (pid % 10);
-    pid /= 10;
-  }
-
-  return ptr;
-}
-
-class ThreadCaptureImpl {
- public:
-  ThreadCaptureImpl(pid_t pid, Allocator<ThreadCaptureImpl>& allocator);
-  ~ThreadCaptureImpl() {}
-  bool ListThreads(TidList& tids);
-  bool CaptureThreads();
-  bool ReleaseThreads();
-  bool ReleaseThread(pid_t tid);
-  bool CapturedThreadInfo(ThreadInfoList& threads);
-  void InjectTestFunc(std::function<void(pid_t)>&& f) { inject_test_func_ = f; }
-
- private:
-  int CaptureThread(pid_t tid);
-  bool ReleaseThread(pid_t tid, unsigned int signal);
-  int PtraceAttach(pid_t tid);
-  void PtraceDetach(pid_t tid, unsigned int signal);
-  bool PtraceThreadInfo(pid_t tid, ThreadInfo& thread_info);
-
-  allocator::map<pid_t, unsigned int> captured_threads_;
-  Allocator<ThreadCaptureImpl> allocator_;
-  pid_t pid_;
-  std::function<void(pid_t)> inject_test_func_;
-};
-
-ThreadCaptureImpl::ThreadCaptureImpl(pid_t pid, Allocator<ThreadCaptureImpl>& allocator)
-    : captured_threads_(allocator), allocator_(allocator), pid_(pid) {}
-
-bool ThreadCaptureImpl::ListThreads(TidList& tids) {
-  tids.clear();
-
-  char pid_buf[11];
-  char path[256] = "/proc/";
-  char* pid_str = pid_to_str(pid_buf, sizeof(pid_buf), pid_);
-  if (!pid_str) {
-    return false;
-  }
-  strlcat(path, pid_str, sizeof(path));
-  strlcat(path, "/task", sizeof(path));
-
-  android::base::unique_fd fd(open(path, O_CLOEXEC | O_DIRECTORY | O_RDONLY));
-  if (fd == -1) {
-    MEM_ALOGE("failed to open %s: %s", path, strerror(errno));
-    return false;
-  }
-
-  struct linux_dirent64 {
-    uint64_t d_ino;
-    int64_t d_off;
-    uint16_t d_reclen;
-    char d_type;
-    char d_name[];
-  } __attribute((packed));
-  char dirent_buf[4096];
-  ssize_t nread;
-  do {
-    nread = syscall(SYS_getdents64, fd.get(), dirent_buf, sizeof(dirent_buf));
-    if (nread < 0) {
-      MEM_ALOGE("failed to get directory entries from %s: %s", path, strerror(errno));
-      return false;
-    } else if (nread > 0) {
-      ssize_t off = 0;
-      while (off < nread) {
-        linux_dirent64* dirent = reinterpret_cast<linux_dirent64*>(dirent_buf + off);
-        off += dirent->d_reclen;
-        pid_t tid = atoi(dirent->d_name);
-        if (tid <= 0) {
-          continue;
-        }
-        tids.push_back(tid);
-      }
-    }
-
-  } while (nread != 0);
-
-  return true;
-}
-
-bool ThreadCaptureImpl::CaptureThreads() {
-  TidList tids{allocator_};
-
-  bool found_new_thread;
-  do {
-    if (!ListThreads(tids)) {
-      ReleaseThreads();
-      return false;
-    }
-
-    found_new_thread = false;
-
-    for (auto it = tids.begin(); it != tids.end(); it++) {
-      auto captured = captured_threads_.find(*it);
-      if (captured == captured_threads_.end()) {
-        if (CaptureThread(*it) < 0) {
-          ReleaseThreads();
-          return false;
-        }
-        found_new_thread = true;
-      }
-    }
-  } while (found_new_thread);
-
-  return true;
-}
-
-// Detatches from a thread, delivering signal if nonzero, logs on error
-void ThreadCaptureImpl::PtraceDetach(pid_t tid, unsigned int signal) {
-  void* sig_ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(signal));
-  if (ptrace(PTRACE_DETACH, tid, NULL, sig_ptr) < 0 && errno != ESRCH) {
-    MEM_ALOGE("failed to detach from thread %d of process %d: %s", tid, pid_, strerror(errno));
-  }
-}
-
-// Attaches to and pauses thread.
-// Returns 1 on attach, 0 on tid not found, -1 and logs on error
-int ThreadCaptureImpl::PtraceAttach(pid_t tid) {
-  int ret = ptrace(PTRACE_SEIZE, tid, NULL, NULL);
-  if (ret < 0) {
-    MEM_ALOGE("failed to attach to thread %d of process %d: %s", tid, pid_, strerror(errno));
-    return -1;
-  }
-
-  if (inject_test_func_) {
-    inject_test_func_(tid);
-  }
-
-  if (ptrace(PTRACE_INTERRUPT, tid, 0, 0) < 0) {
-    if (errno == ESRCH) {
-      return 0;
-    } else {
-      MEM_ALOGE("failed to interrupt thread %d of process %d: %s", tid, pid_, strerror(errno));
-      PtraceDetach(tid, 0);
-      return -1;
-    }
-  }
-  return 1;
-}
-
-bool ThreadCaptureImpl::PtraceThreadInfo(pid_t tid, ThreadInfo& thread_info) {
-  thread_info.tid = tid;
-
-  const unsigned int max_num_regs = 128;  // larger than number of registers on any device
-  uintptr_t regs[max_num_regs];
-  struct iovec iovec;
-  iovec.iov_base = &regs;
-  iovec.iov_len = sizeof(regs);
-
-  if (ptrace(PTRACE_GETREGSET, tid, reinterpret_cast<void*>(NT_PRSTATUS), &iovec)) {
-    MEM_ALOGE("ptrace getregset for thread %d of process %d failed: %s", tid, pid_, strerror(errno));
-    return false;
-  }
-
-  unsigned int num_regs = iovec.iov_len / sizeof(uintptr_t);
-  thread_info.regs.assign(&regs[0], &regs[num_regs]);
-
-  const int sp =
-#if defined(__x86_64__)
-      offsetof(struct pt_regs, rsp) / sizeof(uintptr_t)
-#elif defined(__i386__)
-      offsetof(struct pt_regs, esp) / sizeof(uintptr_t)
-#elif defined(__arm__)
-      offsetof(struct pt_regs, ARM_sp) / sizeof(uintptr_t)
-#elif defined(__aarch64__)
-      offsetof(struct user_pt_regs, sp) / sizeof(uintptr_t)
-#elif defined(__mips__) || defined(__mips64__)
-      offsetof(struct pt_regs, regs[29]) / sizeof(uintptr_t)
-#else
-#error Unrecognized architecture
-#endif
-      ;
-
-  // TODO(ccross): use /proc/tid/status or /proc/pid/maps to get start_stack
-
-  thread_info.stack = std::pair<uintptr_t, uintptr_t>(regs[sp], 0);
-
-  return true;
-}
-
-int ThreadCaptureImpl::CaptureThread(pid_t tid) {
-  int ret = PtraceAttach(tid);
-  if (ret <= 0) {
-    return ret;
-  }
-
-  int status = 0;
-  if (TEMP_FAILURE_RETRY(waitpid(tid, &status, __WALL)) < 0) {
-    MEM_ALOGE("failed to wait for pause of thread %d of process %d: %s", tid, pid_, strerror(errno));
-    PtraceDetach(tid, 0);
-    return -1;
-  }
-
-  if (!WIFSTOPPED(status)) {
-    MEM_ALOGE("thread %d of process %d was not paused after waitpid, killed?", tid, pid_);
-    return 0;
-  }
-
-  unsigned int resume_signal = 0;
-
-  unsigned int signal = WSTOPSIG(status);
-  if ((status >> 16) == PTRACE_EVENT_STOP) {
-    switch (signal) {
-      case SIGSTOP:
-      case SIGTSTP:
-      case SIGTTIN:
-      case SIGTTOU:
-        // group-stop signals
-        break;
-      case SIGTRAP:
-        // normal ptrace interrupt stop
-        break;
-      default:
-        MEM_ALOGE("unexpected signal %d with PTRACE_EVENT_STOP for thread %d of process %d", signal,
-                  tid, pid_);
-        return -1;
-    }
-  } else {
-    // signal-delivery-stop
-    resume_signal = signal;
-  }
-
-  captured_threads_[tid] = resume_signal;
-  return 1;
-}
-
-bool ThreadCaptureImpl::ReleaseThread(pid_t tid) {
-  auto it = captured_threads_.find(tid);
-  if (it == captured_threads_.end()) {
-    return false;
-  }
-  return ReleaseThread(it->first, it->second);
-}
-
-bool ThreadCaptureImpl::ReleaseThread(pid_t tid, unsigned int signal) {
-  PtraceDetach(tid, signal);
-  return true;
-}
-
-bool ThreadCaptureImpl::ReleaseThreads() {
-  bool ret = true;
-  for (auto it = captured_threads_.begin(); it != captured_threads_.end();) {
-    if (ReleaseThread(it->first, it->second)) {
-      it = captured_threads_.erase(it);
-    } else {
-      it++;
-      ret = false;
-    }
-  }
-  return ret;
-}
-
-bool ThreadCaptureImpl::CapturedThreadInfo(ThreadInfoList& threads) {
-  threads.clear();
-
-  for (auto it = captured_threads_.begin(); it != captured_threads_.end(); it++) {
-    ThreadInfo t{0, allocator::vector<uintptr_t>(allocator_), std::pair<uintptr_t, uintptr_t>(0, 0)};
-    if (!PtraceThreadInfo(it->first, t)) {
-      return false;
-    }
-    threads.push_back(t);
-  }
-  return true;
-}
-
-ThreadCapture::ThreadCapture(pid_t pid, Allocator<ThreadCapture> allocator) {
-  Allocator<ThreadCaptureImpl> impl_allocator = allocator;
-  impl_ = impl_allocator.make_unique(pid, impl_allocator);
-}
-
-ThreadCapture::~ThreadCapture() {}
-
-bool ThreadCapture::ListThreads(TidList& tids) {
-  return impl_->ListThreads(tids);
-}
-
-bool ThreadCapture::CaptureThreads() {
-  return impl_->CaptureThreads();
-}
-
-bool ThreadCapture::ReleaseThreads() {
-  return impl_->ReleaseThreads();
-}
-
-bool ThreadCapture::ReleaseThread(pid_t tid) {
-  return impl_->ReleaseThread(tid);
-}
-
-bool ThreadCapture::CapturedThreadInfo(ThreadInfoList& threads) {
-  return impl_->CapturedThreadInfo(threads);
-}
-
-void ThreadCapture::InjectTestFunc(std::function<void(pid_t)>&& f) {
-  impl_->InjectTestFunc(std::forward<std::function<void(pid_t)>>(f));
-}
-
-}  // namespace android
diff --git a/libmemunreachable/ThreadCapture.h b/libmemunreachable/ThreadCapture.h
deleted file mode 100644
index 961cb60..0000000
--- a/libmemunreachable/ThreadCapture.h
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_THREAD_CAPTURE_H_
-#define LIBMEMUNREACHABLE_THREAD_CAPTURE_H_
-
-#include <utility>
-
-#include "Allocator.h"
-
-namespace android {
-
-struct ThreadInfo {
-  pid_t tid;
-  allocator::vector<uintptr_t> regs;
-  std::pair<uintptr_t, uintptr_t> stack;
-};
-
-using TidList = allocator::vector<pid_t>;
-using ThreadInfoList = allocator::vector<ThreadInfo>;
-
-class ThreadCaptureImpl;
-
-class ThreadCapture {
- public:
-  ThreadCapture(pid_t pid, Allocator<ThreadCapture> allocator);
-  ~ThreadCapture();
-
-  bool ListThreads(TidList& tids);
-  bool CaptureThreads();
-  bool ReleaseThreads();
-  bool ReleaseThread(pid_t tid);
-  bool CapturedThreadInfo(ThreadInfoList& threads);
-  void InjectTestFunc(std::function<void(pid_t)>&& f);
-
- private:
-  ThreadCapture(const ThreadCapture&) = delete;
-  void operator=(const ThreadCapture&) = delete;
-
-  Allocator<ThreadCaptureImpl>::unique_ptr impl_;
-};
-
-}  // namespace android
-
-#endif
diff --git a/libmemunreachable/bionic.h b/libmemunreachable/bionic.h
deleted file mode 100644
index dd1ec79..0000000
--- a/libmemunreachable/bionic.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_BIONIC_H_
-#define LIBMEMUNREACHABLE_BIONIC_H_
-
-#include <stdint.h>
-#include <stdlib.h>
-#include <sys/cdefs.h>
-
-__BEGIN_DECLS
-
-/* Exported from bionic */
-extern void malloc_disable();
-extern void malloc_enable();
-extern int malloc_iterate(uintptr_t base, size_t size,
-                          void (*callback)(uintptr_t base, size_t size, void* arg), void* arg);
-extern ssize_t malloc_backtrace(void* pointer, uintptr_t* frames, size_t frame_count);
-
-__END_DECLS
-
-#endif  // LIBMEMUNREACHABLE_BIONIC_H_
diff --git a/libmemunreachable/include/memunreachable/memunreachable.h b/libmemunreachable/include/memunreachable/memunreachable.h
deleted file mode 100644
index 011443f..0000000
--- a/libmemunreachable/include/memunreachable/memunreachable.h
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_MEMUNREACHABLE_H_
-#define LIBMEMUNREACHABLE_MEMUNREACHABLE_H_
-
-#include <string.h>
-#include <sys/cdefs.h>
-
-#ifdef __cplusplus
-
-#include <string>
-#include <vector>
-
-namespace android {
-
-struct Leak {
-  uintptr_t begin = 0;
-  size_t size = 0;
-
-  size_t referenced_count = 0;
-  size_t referenced_size = 0;
-
-  size_t similar_count = 0;
-  size_t similar_size = 0;
-  size_t similar_referenced_count = 0;
-  size_t similar_referenced_size = 0;
-
-  size_t total_size = 0;
-
-  static const size_t contents_length = 32;
-  char contents[contents_length] = {};
-
-  struct Backtrace {
-    size_t num_frames = 0;
-
-    static const size_t max_frames = 16;
-    uintptr_t frames[max_frames] = {};
-
-    size_t reserved[8] = {};
-  } backtrace;
-
-  size_t reserved[8] = {};
-
-  std::string ToString(bool log_contents) const;
-};
-
-struct UnreachableMemoryInfo {
-  std::vector<Leak> leaks;
-  size_t num_leaks = 0;
-  size_t leak_bytes = 0;
-  size_t num_allocations = 0;
-  size_t allocation_bytes = 0;
-
-  size_t version = 0;  // Must be 0
-  size_t reserved[8] = {};
-
-  UnreachableMemoryInfo() {}
-  ~UnreachableMemoryInfo();
-
-  std::string ToString(bool log_contents) const;
-};
-
-bool GetUnreachableMemory(UnreachableMemoryInfo& info, size_t limit = 100);
-
-std::string GetUnreachableMemoryString(bool log_contents = false, size_t limit = 100);
-
-}  // namespace android
-
-#endif
-
-__BEGIN_DECLS
-
-bool LogUnreachableMemory(bool log_contents, size_t limit);
-
-bool NoLeaks();
-
-__END_DECLS
-
-#endif  // LIBMEMUNREACHABLE_MEMUNREACHABLE_H_
diff --git a/libmemunreachable/libmemunreachable.map b/libmemunreachable/libmemunreachable.map
deleted file mode 100644
index 0d0d954..0000000
--- a/libmemunreachable/libmemunreachable.map
+++ /dev/null
@@ -1,13 +0,0 @@
-LIBMEMUNREACHABLE {
-  global:
-    LogUnreachableMemory;
-    NoLeaks;
-    extern "C++" {
-      android::GetUnreachableMemory*;
-      android::GetUnreachableMemoryString*;
-      android::Leak::*;
-      android::UnreachableMemoryInfo::*;
-    };
-  local:
-    *;
-};
diff --git a/libmemunreachable/log.h b/libmemunreachable/log.h
deleted file mode 100644
index 44c5f85..0000000
--- a/libmemunreachable/log.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_LOG_H_
-#define LIBMEMUNREACHABLE_LOG_H_
-
-#define LOG_TAG "libmemunreachable"
-
-#if defined(__ANDROID__)
-
-#include <async_safe/log.h>
-
-#define MEM_ALOGE(...) async_safe_format_log(ANDROID_LOG_ERROR, LOG_TAG, ##__VA_ARGS__)
-#define MEM_ALOGW(...) async_safe_format_log(ANDROID_LOG_WARN, LOG_TAG, ##__VA_ARGS__)
-#define MEM_ALOGI(...) async_safe_format_log(ANDROID_LOG_INFO, LOG_TAG, ##__VA_ARGS__)
-#define MEM_ALOGV_IMPL(...) async_safe_format_log(ANDROID_LOG_VERBOSE, LOG_TAG, ##__VA_ARGS__)
-
-#ifdef NDEBUG
-#define MEM_ALOGV(...)             \
-  do {                             \
-    if (0) {                       \
-      MEM_ALOGV_IMPL(__VA_ARGS__); \
-    }                              \
-  } while (0)
-#else
-#define MEM_ALOGV(...) MEM_ALOGV_IMPL(__VA_ARGS__)
-#endif
-
-#define MEM_LOG_ALWAYS_FATAL(...) async_safe_fatal(__VA_ARGS__)
-
-#else
-
-#include <log/log.h>
-
-#define MEM_ALOGW ALOGW
-#define MEM_ALOGE ALOGE
-#define MEM_ALOGV ALOGV
-#define MEM_ALOGI ALOGI
-
-#define MEM_LOG_ALWAYS_FATAL LOG_ALWAYS_FATAL
-
-#endif
-
-#endif  // LIBMEMUNREACHABLE_LOG_H_
diff --git a/libmemunreachable/tests/Allocator_test.cpp b/libmemunreachable/tests/Allocator_test.cpp
deleted file mode 100644
index 8991a7b..0000000
--- a/libmemunreachable/tests/Allocator_test.cpp
+++ /dev/null
@@ -1,176 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <Allocator.h>
-
-#include <ScopedDisableMalloc.h>
-#include <gtest/gtest.h>
-
-namespace android {
-
-std::function<void()> ScopedAlarm::func_;
-
-class AllocatorTest : public testing::Test {
- protected:
-  AllocatorTest() : heap(), disable_malloc_() {}
-  virtual void SetUp() { heap_count = 0; }
-  virtual void TearDown() {
-    ASSERT_EQ(heap_count, 0);
-    ASSERT_TRUE(heap.empty());
-    ASSERT_FALSE(disable_malloc_.timed_out());
-  }
-  Heap heap;
-
- private:
-  ScopedDisableMallocTimeout disable_malloc_;
-};
-
-TEST_F(AllocatorTest, simple) {
-  Allocator<char[100]> allocator(heap);
-  void* ptr = allocator.allocate();
-  ASSERT_TRUE(ptr != NULL);
-  allocator.deallocate(ptr);
-}
-
-TEST_F(AllocatorTest, multiple) {
-  Allocator<char[100]> allocator(heap);
-  void* ptr1 = allocator.allocate();
-  ASSERT_TRUE(ptr1 != NULL);
-  void* ptr2 = allocator.allocate();
-  ASSERT_TRUE(ptr2 != NULL);
-  ASSERT_NE(ptr1, ptr2);
-  allocator.deallocate(ptr1);
-  void* ptr3 = allocator.allocate();
-  ASSERT_EQ(ptr1, ptr3);
-  allocator.deallocate(ptr3);
-  allocator.deallocate(ptr2);
-}
-
-TEST_F(AllocatorTest, many) {
-  const int num = 4096;
-  const int size = 128;
-  Allocator<char[size]> allocator(heap);
-  void* ptr[num];
-  for (int i = 0; i < num; i++) {
-    ptr[i] = allocator.allocate();
-    memset(ptr[i], 0xaa, size);
-    *(reinterpret_cast<unsigned char*>(ptr[i])) = i;
-  }
-
-  for (int i = 0; i < num; i++) {
-    for (int j = 0; j < num; j++) {
-      if (i != j) {
-        ASSERT_NE(ptr[i], ptr[j]);
-      }
-    }
-  }
-
-  for (int i = 0; i < num; i++) {
-    ASSERT_EQ(*(reinterpret_cast<unsigned char*>(ptr[i])), i & 0xFF);
-    allocator.deallocate(ptr[i]);
-  }
-}
-
-TEST_F(AllocatorTest, large) {
-  const size_t size = 1024 * 1024;
-  Allocator<char[size]> allocator(heap);
-  void* ptr = allocator.allocate();
-  memset(ptr, 0xaa, size);
-  allocator.deallocate(ptr);
-}
-
-TEST_F(AllocatorTest, many_large) {
-  const int num = 128;
-  const int size = 1024 * 1024;
-  Allocator<char[size]> allocator(heap);
-  void* ptr[num];
-  for (int i = 0; i < num; i++) {
-    ptr[i] = allocator.allocate();
-    memset(ptr[i], 0xaa, size);
-    *(reinterpret_cast<unsigned char*>(ptr[i])) = i;
-  }
-
-  for (int i = 0; i < num; i++) {
-    ASSERT_EQ(*(reinterpret_cast<unsigned char*>(ptr[i])), i & 0xFF);
-    allocator.deallocate(ptr[i]);
-  }
-}
-
-TEST_F(AllocatorTest, copy) {
-  Allocator<char[100]> a(heap);
-  Allocator<char[200]> b = a;
-  Allocator<char[300]> c(b);
-  Allocator<char[100]> d(a);
-  Allocator<char[100]> e(heap);
-
-  ASSERT_EQ(a, b);
-  ASSERT_EQ(a, c);
-  ASSERT_EQ(a, d);
-  ASSERT_EQ(a, e);
-
-  void* ptr1 = a.allocate();
-  void* ptr2 = b.allocate();
-  void* ptr3 = c.allocate();
-  void* ptr4 = d.allocate();
-
-  b.deallocate(ptr1);
-  d.deallocate(ptr2);
-  a.deallocate(ptr3);
-  c.deallocate(ptr4);
-}
-
-TEST_F(AllocatorTest, stl_vector) {
-  auto v = allocator::vector<int>(Allocator<int>(heap));
-  for (int i = 0; i < 1024; i++) {
-    v.push_back(i);
-  }
-  for (int i = 0; i < 1024; i++) {
-    ASSERT_EQ(v[i], i);
-  }
-  v.clear();
-}
-
-TEST_F(AllocatorTest, stl_list) {
-  auto v = allocator::list<int>(Allocator<int>(heap));
-  for (int i = 0; i < 1024; i++) {
-    v.push_back(i);
-  }
-  int i = 0;
-  for (auto iter = v.begin(); iter != v.end(); iter++, i++) {
-    ASSERT_EQ(*iter, i);
-  }
-  v.clear();
-}
-
-TEST_F(AllocatorTest, shared) {
-  Allocator<int> allocator(heap);
-
-  Allocator<int>::shared_ptr ptr = allocator.make_shared(0);
-  {
-    auto ptr2 = ptr;  // NOLINT, test copy of ptr
-  }
-  ASSERT_NE(ptr, nullptr);
-}
-
-TEST_F(AllocatorTest, unique) {
-  Allocator<int> allocator(heap);
-
-  Allocator<int>::unique_ptr ptr = allocator.make_unique(0);
-
-  ASSERT_NE(ptr, nullptr);
-}
-
-}  // namespace android
diff --git a/libmemunreachable/tests/Binder_test.cpp b/libmemunreachable/tests/Binder_test.cpp
deleted file mode 100644
index eaf7652..0000000
--- a/libmemunreachable/tests/Binder_test.cpp
+++ /dev/null
@@ -1,168 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <signal.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <binder/Binder.h>
-#include <binder/IBinder.h>
-#include <binder/IServiceManager.h>
-#include <binder/Parcel.h>
-#include <binder/ProcessState.h>
-
-#include <gtest/gtest.h>
-
-#include "Allocator.h"
-#include "Binder.h"
-
-namespace android {
-
-static const String16 service_name("test.libmemunreachable_binder");
-
-// Provides a service that will hold a strong reference to any remote binder
-// object, so that the test can verify that a remote strong reference is
-// visible to libmemunreachable.
-class BinderService : public BBinder {
- public:
-  BinderService() = default;
-  virtual ~BinderService() = default;
-
-  virtual status_t onTransact(uint32_t /*code*/, const Parcel& data, Parcel* reply,
-                              uint32_t /*flags*/ = 0) {
-    reply->writeStrongBinder(ref);
-    ref = data.readStrongBinder();
-    return 0;
-  }
-
- private:
-  sp<IBinder> ref;
-};
-
-class BinderObject : public BBinder {
- public:
-  BinderObject() = default;
-  ~BinderObject() = default;
-};
-
-// Forks a subprocess that registers a BinderService with the global binder
-// servicemanager.  Requires root permissions.
-class ServiceProcess {
- public:
-  ServiceProcess() : child_(0) {}
-  ~ServiceProcess() { Stop(); }
-
-  bool Run() {
-    pid_t ret = fork();
-    if (ret < 0) {
-      return false;
-    } else if (ret == 0) {
-      // child
-      _exit(Service());
-    } else {
-      // parent
-      child_ = ret;
-      return true;
-    }
-  }
-
-  bool Stop() {
-    if (child_ > 0) {
-      if (kill(child_, SIGTERM)) {
-        return false;
-      }
-      int status = 0;
-      if (TEMP_FAILURE_RETRY(waitpid(child_, &status, 0)) != child_) {
-        return false;
-      }
-      child_ = 0;
-      return WIFEXITED(status) && WEXITSTATUS(status) == 0;
-    }
-
-    return true;
-  }
-
-  int Service() {
-    sp<ProcessState> proc{ProcessState::self()};
-    sp<IServiceManager> sm = defaultServiceManager();
-    if (sm == nullptr) {
-      fprintf(stderr, "Failed to get service manager\n");
-      return 1;
-    }
-    // This step requires root permissions
-    if (sm->addService(service_name, new BinderService()) != OK) {
-      fprintf(stderr, "Failed to add test service\n");
-      return 1;
-    }
-    proc->startThreadPool();
-    pause();
-    return 0;
-  }
-
- private:
-  pid_t child_;
-};
-
-class MemunreachableBinderTest : public ::testing::Test {
- protected:
-  ServiceProcess service_process_;
-};
-
-// Tests that a local binder object with a remote strong reference is visible
-// through the libmemunreachable BinderReferences interface, which uses the
-// getBinderKernelReferences method in libbinder.  Starts a BinderService
-// through ServiceProcess as a remote service to hold the strong reference.
-TEST_F(MemunreachableBinderTest, binder) {
-  ASSERT_EQ(static_cast<uid_t>(0), getuid()) << "This test must be run as root.";
-
-  ServiceProcess service_process;
-  ASSERT_TRUE(service_process.Run());
-
-  sp<IServiceManager> sm = defaultServiceManager();
-  ASSERT_TRUE(sm != nullptr);
-
-  // A small sleep allows the service to start, which
-  // prevents a longer sleep in getService.
-  usleep(100000);
-
-  sp<IBinder> service = sm->getService(service_name);
-  ASSERT_TRUE(service != nullptr);
-
-  sp<IBinder> binder{new BinderObject()};
-
-  Parcel send;
-  Parcel reply;
-
-  send.writeStrongBinder(binder);
-  status_t rv = service->transact(0, send, &reply);
-  ASSERT_EQ(static_cast<status_t>(OK), rv);
-
-  Heap heap;
-  allocator::vector<uintptr_t> refs{heap};
-
-  ASSERT_TRUE(BinderReferences(refs));
-
-  bool found_ref = false;
-  for (auto ref : refs) {
-    if (ref == reinterpret_cast<uintptr_t>(binder.get())) {
-      found_ref = true;
-    }
-  }
-
-  ASSERT_TRUE(found_ref);
-}
-
-}  // namespace android
diff --git a/libmemunreachable/tests/DisableMalloc_test.cpp b/libmemunreachable/tests/DisableMalloc_test.cpp
deleted file mode 100644
index f446719..0000000
--- a/libmemunreachable/tests/DisableMalloc_test.cpp
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/time.h>
-
-#include <chrono>
-#include <functional>
-
-#include <ScopedDisableMalloc.h>
-#include <gtest/gtest.h>
-
-using namespace std::chrono_literals;
-
-namespace android {
-
-class DisableMallocTest : public ::testing::Test {
- protected:
-  void alarm(std::chrono::microseconds us) {
-    std::chrono::seconds s = std::chrono::duration_cast<std::chrono::seconds>(us);
-    itimerval t = itimerval();
-    t.it_value.tv_sec = s.count();
-    t.it_value.tv_usec = (us - s).count();
-    setitimer(ITIMER_REAL, &t, NULL);
-  }
-};
-
-TEST_F(DisableMallocTest, reenable) {
-  ASSERT_EXIT(
-      {
-        alarm(100ms);
-        void* ptr1 = malloc(128);
-        ASSERT_NE(ptr1, nullptr);
-        free(ptr1);
-        { ScopedDisableMalloc disable_malloc; }
-        void* ptr2 = malloc(128);
-        ASSERT_NE(ptr2, nullptr);
-        free(ptr2);
-        _exit(1);
-      },
-      ::testing::ExitedWithCode(1), "");
-}
-
-TEST_F(DisableMallocTest, deadlock_allocate) {
-  ASSERT_DEATH(
-      {
-        void* ptr = malloc(128);
-        ASSERT_NE(ptr, nullptr);
-        free(ptr);
-        {
-          alarm(100ms);
-          ScopedDisableMalloc disable_malloc;
-          void* ptr = malloc(128);
-          ASSERT_NE(ptr, nullptr);
-          free(ptr);
-        }
-      },
-      "");
-}
-
-TEST_F(DisableMallocTest, deadlock_new) {
-  ASSERT_DEATH(
-      {
-        // C++ allows `new Foo` to be replaced with a stack allocation or merged
-        // with future `new Foo` expressions, provided certain conditions are
-        // met [expr.new/10]. None of this applies to `operator new(size_t)`.
-        void* ptr = ::operator new(1);
-        ASSERT_NE(ptr, nullptr);
-        ::operator delete(ptr);
-        {
-          alarm(100ms);
-          ScopedDisableMalloc disable_malloc;
-          void* ptr = ::operator new(1);
-          ASSERT_NE(ptr, nullptr);
-          ::operator delete(ptr);
-        }
-      },
-      "");
-}
-
-TEST_F(DisableMallocTest, deadlock_delete) {
-  ASSERT_DEATH(
-      {
-        void* ptr = ::operator new(1);
-        ASSERT_NE(ptr, nullptr);
-        {
-          alarm(250ms);
-          ScopedDisableMalloc disable_malloc;
-          ::operator delete(ptr);
-        }
-      },
-      "");
-}
-
-TEST_F(DisableMallocTest, deadlock_free) {
-  ASSERT_DEATH(
-      {
-        void* ptr = malloc(128);
-        ASSERT_NE(ptr, nullptr);
-        {
-          alarm(100ms);
-          ScopedDisableMalloc disable_malloc;
-          free(ptr);
-        }
-      },
-      "");
-}
-
-TEST_F(DisableMallocTest, deadlock_fork) {
-  ASSERT_DEATH({
-    {
-      alarm(100ms);
-      ScopedDisableMalloc disable_malloc;
-      fork();
-}
-}, "");
-}
-
-}  // namespace android
diff --git a/libmemunreachable/tests/HeapWalker_test.cpp b/libmemunreachable/tests/HeapWalker_test.cpp
deleted file mode 100644
index 9610cd6..0000000
--- a/libmemunreachable/tests/HeapWalker_test.cpp
+++ /dev/null
@@ -1,223 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/mman.h>
-#include <unistd.h>
-
-#include "HeapWalker.h"
-
-#include <ScopedDisableMalloc.h>
-#include <gtest/gtest.h>
-#include "Allocator.h"
-
-namespace android {
-
-class HeapWalkerTest : public ::testing::Test {
- public:
-  HeapWalkerTest() : disable_malloc_(), heap_() {}
-
-  void TearDown() {
-    ASSERT_TRUE(heap_.empty());
-    if (!HasFailure()) {
-      ASSERT_FALSE(disable_malloc_.timed_out());
-    }
-  }
-
- protected:
-  ScopedDisableMallocTimeout disable_malloc_;
-  Heap heap_;
-};
-
-TEST_F(HeapWalkerTest, allocation) {
-  HeapWalker heap_walker(heap_);
-  ASSERT_TRUE(heap_walker.Allocation(3, 4));
-  ASSERT_TRUE(heap_walker.Allocation(2, 3));
-  ASSERT_TRUE(heap_walker.Allocation(4, 5));
-  ASSERT_TRUE(heap_walker.Allocation(6, 7));
-  ASSERT_TRUE(heap_walker.Allocation(0, 1));
-}
-
-TEST_F(HeapWalkerTest, overlap) {
-  HeapWalker heap_walker(heap_);
-  ASSERT_TRUE(heap_walker.Allocation(2, 3));
-  ASSERT_TRUE(heap_walker.Allocation(3, 4));
-  ASSERT_FALSE(heap_walker.Allocation(2, 3));
-  ASSERT_FALSE(heap_walker.Allocation(1, 3));
-  ASSERT_FALSE(heap_walker.Allocation(1, 4));
-  ASSERT_FALSE(heap_walker.Allocation(1, 5));
-  ASSERT_FALSE(heap_walker.Allocation(3, 4));
-  ASSERT_FALSE(heap_walker.Allocation(3, 5));
-  ASSERT_TRUE(heap_walker.Allocation(4, 5));
-  ASSERT_TRUE(heap_walker.Allocation(1, 2));
-}
-
-TEST_F(HeapWalkerTest, zero) {
-  HeapWalker heap_walker(heap_);
-  ASSERT_TRUE(heap_walker.Allocation(2, 2));
-  ASSERT_FALSE(heap_walker.Allocation(2, 2));
-  ASSERT_TRUE(heap_walker.Allocation(3, 3));
-  ASSERT_TRUE(heap_walker.Allocation(1, 1));
-  ASSERT_FALSE(heap_walker.Allocation(2, 3));
-}
-
-TEST_F(HeapWalkerTest, mapping) {
-  HeapWalker heap_walker(heap_);
-  heap_walker.Mapping(2, 3);
-  heap_walker.Mapping(4, 5);
-  ASSERT_TRUE(heap_walker.Allocation(2, 3));
-  ASSERT_TRUE(heap_walker.Allocation(4, 5));
-  // space between mappings is not checked, but could be in the future
-  ASSERT_TRUE(heap_walker.Allocation(3, 4));
-
-  // re-enable malloc, ASSERT_DEATH may allocate
-  disable_malloc_.Enable();
-  ASSERT_DEATH({ heap_walker.Allocation(1, 2); }, "0x1-0x2.*outside.*0x2-0x5");
-  ASSERT_DEATH({ heap_walker.Allocation(1, 3); }, "0x1-0x3.*outside.*0x2-0x5");
-  ASSERT_DEATH({ heap_walker.Allocation(4, 6); }, "0x4-0x6.*outside.*0x2-0x5");
-  ASSERT_DEATH({ heap_walker.Allocation(5, 6); }, "0x5-0x6.*outside.*0x2-0x5");
-  ASSERT_DEATH({ heap_walker.Allocation(1, 6); }, "0x1-0x6.*outside.*0x2-0x5");
-}
-
-#define buffer_begin(buffer) reinterpret_cast<uintptr_t>(buffer)
-#define buffer_end(buffer) (reinterpret_cast<uintptr_t>(buffer) + sizeof(buffer))
-
-TEST_F(HeapWalkerTest, leak) {
-  void* buffer1[16]{};
-  char buffer2[16]{};
-  buffer1[0] = &buffer2[0] - sizeof(void*);
-  buffer1[1] = &buffer2[15] + sizeof(void*);
-
-  HeapWalker heap_walker(heap_);
-  heap_walker.Allocation(buffer_begin(buffer2), buffer_end(buffer2));
-
-  ASSERT_EQ(true, heap_walker.DetectLeaks());
-
-  allocator::vector<Range> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, heap_walker.Leaked(leaked, 100, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(1U, num_leaks);
-  EXPECT_EQ(16U, leaked_bytes);
-  ASSERT_EQ(1U, leaked.size());
-  EXPECT_EQ(buffer_begin(buffer2), leaked[0].begin);
-  EXPECT_EQ(buffer_end(buffer2), leaked[0].end);
-}
-
-TEST_F(HeapWalkerTest, live) {
-  const int from_buffer_entries = 4;
-  const int to_buffer_bytes = 16;
-
-  for (int i = 0; i < from_buffer_entries; i++) {
-    for (int j = 0; j < to_buffer_bytes; j++) {
-      void* buffer1[from_buffer_entries]{};
-      char buffer2[to_buffer_bytes]{};
-      buffer1[i] = &buffer2[j];
-
-      HeapWalker heap_walker(heap_);
-      heap_walker.Allocation(buffer_begin(buffer2), buffer_end(buffer2));
-      heap_walker.Root(buffer_begin(buffer1), buffer_end(buffer1));
-
-      ASSERT_EQ(true, heap_walker.DetectLeaks());
-
-      allocator::vector<Range> leaked(heap_);
-      size_t num_leaks = SIZE_MAX;
-      size_t leaked_bytes = SIZE_MAX;
-      ASSERT_EQ(true, heap_walker.Leaked(leaked, 100, &num_leaks, &leaked_bytes));
-
-      EXPECT_EQ(0U, num_leaks);
-      EXPECT_EQ(0U, leaked_bytes);
-      EXPECT_EQ(0U, leaked.size());
-    }
-  }
-}
-
-TEST_F(HeapWalkerTest, unaligned) {
-  const int from_buffer_entries = 4;
-  const int to_buffer_bytes = 16;
-  void* buffer1[from_buffer_entries]{};
-  char buffer2[to_buffer_bytes]{};
-
-  buffer1[1] = &buffer2;
-
-  for (unsigned int i = 0; i < sizeof(uintptr_t); i++) {
-    for (unsigned int j = 0; j < sizeof(uintptr_t); j++) {
-      HeapWalker heap_walker(heap_);
-      heap_walker.Allocation(buffer_begin(buffer2), buffer_end(buffer2));
-      heap_walker.Root(buffer_begin(buffer1) + i, buffer_end(buffer1) - j);
-
-      ASSERT_EQ(true, heap_walker.DetectLeaks());
-
-      allocator::vector<Range> leaked(heap_);
-      size_t num_leaks = SIZE_MAX;
-      size_t leaked_bytes = SIZE_MAX;
-      ASSERT_EQ(true, heap_walker.Leaked(leaked, 100, &num_leaks, &leaked_bytes));
-
-      EXPECT_EQ(0U, num_leaks);
-      EXPECT_EQ(0U, leaked_bytes);
-      EXPECT_EQ(0U, leaked.size());
-    }
-  }
-}
-
-TEST_F(HeapWalkerTest, cycle) {
-  void* buffer1;
-  void* buffer2;
-
-  buffer1 = &buffer2;
-  buffer2 = &buffer1;
-
-  HeapWalker heap_walker(heap_);
-  heap_walker.Allocation(buffer_begin(buffer1), buffer_end(buffer1));
-  heap_walker.Allocation(buffer_begin(buffer2), buffer_end(buffer2));
-
-  ASSERT_EQ(true, heap_walker.DetectLeaks());
-
-  allocator::vector<Range> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, heap_walker.Leaked(leaked, 100, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(2U, num_leaks);
-  EXPECT_EQ(2 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(2U, leaked.size());
-}
-
-TEST_F(HeapWalkerTest, segv) {
-  const size_t page_size = sysconf(_SC_PAGE_SIZE);
-  void* buffer1 = mmap(NULL, page_size, PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
-  ASSERT_NE(buffer1, nullptr);
-  void* buffer2;
-
-  buffer2 = &buffer1;
-
-  HeapWalker heap_walker(heap_);
-  heap_walker.Allocation(buffer_begin(buffer1), buffer_begin(buffer1) + page_size);
-  heap_walker.Root(buffer_begin(buffer2), buffer_end(buffer2));
-
-  ASSERT_EQ(true, heap_walker.DetectLeaks());
-
-  allocator::vector<Range> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, heap_walker.Leaked(leaked, 100, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(0U, num_leaks);
-  EXPECT_EQ(0U, leaked_bytes);
-  ASSERT_EQ(0U, leaked.size());
-}
-
-}  // namespace android
diff --git a/libmemunreachable/tests/LeakFolding_test.cpp b/libmemunreachable/tests/LeakFolding_test.cpp
deleted file mode 100644
index f5b3631..0000000
--- a/libmemunreachable/tests/LeakFolding_test.cpp
+++ /dev/null
@@ -1,431 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "LeakFolding.h"
-#include "HeapWalker.h"
-
-#include <ScopedDisableMalloc.h>
-#include <gtest/gtest.h>
-#include "Allocator.h"
-
-namespace android {
-
-class LeakFoldingTest : public ::testing::Test {
- public:
-  LeakFoldingTest() : disable_malloc_(), heap_() {}
-
-  void TearDown() {
-    ASSERT_TRUE(heap_.empty());
-    if (!HasFailure()) {
-      ASSERT_FALSE(disable_malloc_.timed_out());
-    }
-  }
-
- protected:
-  ScopedDisableMallocTimeout disable_malloc_;
-  Heap heap_;
-};
-
-#define buffer_begin(buffer) reinterpret_cast<uintptr_t>(&(buffer)[0])
-#define buffer_end(buffer) (reinterpret_cast<uintptr_t>(&(buffer)[0]) + sizeof(buffer))
-#define ALLOCATION(heap_walker, buffer) \
-  ASSERT_EQ(true, (heap_walker).Allocation(buffer_begin(buffer), buffer_end(buffer)))
-
-TEST_F(LeakFoldingTest, one) {
-  void* buffer1[1] = {nullptr};
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(1U, num_leaks);
-  EXPECT_EQ(sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(1U, leaked.size());
-  EXPECT_EQ(0U, leaked[0].referenced_count);
-  EXPECT_EQ(0U, leaked[0].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, two) {
-  void* buffer1[1] = {nullptr};
-  void* buffer2[1] = {nullptr};
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(2U, num_leaks);
-  EXPECT_EQ(2 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(2U, leaked.size());
-  EXPECT_EQ(0U, leaked[0].referenced_count);
-  EXPECT_EQ(0U, leaked[0].referenced_size);
-  EXPECT_EQ(0U, leaked[1].referenced_count);
-  EXPECT_EQ(0U, leaked[1].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, dominator) {
-  void* buffer1[1];
-  void* buffer2[1] = {nullptr};
-
-  buffer1[0] = buffer2;
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(2U, num_leaks);
-  EXPECT_EQ(2 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(1U, leaked.size());
-  EXPECT_EQ(1U, leaked[0].referenced_count);
-  EXPECT_EQ(sizeof(uintptr_t), leaked[0].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, cycle) {
-  void* buffer1[1];
-  void* buffer2[1];
-  void* buffer3[1];
-
-  buffer1[0] = buffer2;
-  buffer2[0] = buffer3;
-  buffer3[0] = buffer2;
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-  ALLOCATION(heap_walker, buffer3);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(3U, num_leaks);
-  EXPECT_EQ(3 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(1U, leaked.size());
-  EXPECT_EQ(2U, leaked[0].referenced_count);
-  EXPECT_EQ(2 * sizeof(uintptr_t), leaked[0].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, dominator_cycle) {
-  void* buffer1[2] = {nullptr, nullptr};
-  void* buffer2[2];
-  void* buffer3[1] = {nullptr};
-
-  buffer1[0] = &buffer2;
-  buffer2[0] = &buffer1;
-  buffer2[1] = &buffer3;
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-  ALLOCATION(heap_walker, buffer3);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(3U, num_leaks);
-  EXPECT_EQ(5 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(2U, leaked.size());
-
-  EXPECT_EQ(2U, leaked[0].referenced_count);
-  EXPECT_EQ(3 * sizeof(uintptr_t), leaked[0].referenced_size);
-  EXPECT_EQ(2U, leaked[1].referenced_count);
-  EXPECT_EQ(3 * sizeof(uintptr_t), leaked[1].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, two_cycles) {
-  void* buffer1[1];
-  void* buffer2[1];
-  void* buffer3[1];
-  void* buffer4[1];
-  void* buffer5[1];
-  void* buffer6[1];
-
-  buffer1[0] = buffer3;
-  buffer2[0] = buffer5;
-  buffer3[0] = buffer4;
-  buffer4[0] = buffer3;
-  buffer5[0] = buffer6;
-  buffer6[0] = buffer5;
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-  ALLOCATION(heap_walker, buffer3);
-  ALLOCATION(heap_walker, buffer4);
-  ALLOCATION(heap_walker, buffer5);
-  ALLOCATION(heap_walker, buffer6);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(6U, num_leaks);
-  EXPECT_EQ(6 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(2U, leaked.size());
-  EXPECT_EQ(2U, leaked[0].referenced_count);
-  EXPECT_EQ(2 * sizeof(uintptr_t), leaked[0].referenced_size);
-  EXPECT_EQ(2U, leaked[1].referenced_count);
-  EXPECT_EQ(2 * sizeof(uintptr_t), leaked[1].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, two_dominator_cycles) {
-  void* buffer1[1];
-  void* buffer2[1];
-  void* buffer3[1];
-  void* buffer4[1];
-
-  buffer1[0] = buffer2;
-  buffer2[0] = buffer1;
-  buffer3[0] = buffer4;
-  buffer4[0] = buffer3;
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-  ALLOCATION(heap_walker, buffer3);
-  ALLOCATION(heap_walker, buffer4);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(4U, num_leaks);
-  EXPECT_EQ(4 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(4U, leaked.size());
-  EXPECT_EQ(1U, leaked[0].referenced_count);
-  EXPECT_EQ(sizeof(uintptr_t), leaked[0].referenced_size);
-  EXPECT_EQ(1U, leaked[1].referenced_count);
-  EXPECT_EQ(sizeof(uintptr_t), leaked[1].referenced_size);
-  EXPECT_EQ(1U, leaked[2].referenced_count);
-  EXPECT_EQ(sizeof(uintptr_t), leaked[2].referenced_size);
-  EXPECT_EQ(1U, leaked[3].referenced_count);
-  EXPECT_EQ(sizeof(uintptr_t), leaked[3].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, giant_dominator_cycle) {
-  const size_t n = 1000;
-  void* buffer[n];
-
-  HeapWalker heap_walker(heap_);
-
-  for (size_t i = 0; i < n; i++) {
-    ASSERT_TRUE(heap_walker.Allocation(reinterpret_cast<uintptr_t>(&buffer[i]),
-                                       reinterpret_cast<uintptr_t>(&buffer[i + 1])));
-  }
-
-  for (size_t i = 0; i < n - 1; i++) {
-    buffer[i] = &buffer[i + 1];
-  }
-  buffer[n - 1] = &buffer[0];
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(n, num_leaks);
-  EXPECT_EQ(n * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(1000U, leaked.size());
-  EXPECT_EQ(n - 1, leaked[0].referenced_count);
-  EXPECT_EQ((n - 1) * sizeof(uintptr_t), leaked[0].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, giant_cycle) {
-  const size_t n = 1000;
-  void* buffer[n];
-  void* buffer1[1];
-
-  HeapWalker heap_walker(heap_);
-
-  for (size_t i = 0; i < n - 1; i++) {
-    buffer[i] = &buffer[i + 1];
-  }
-  buffer[n - 1] = &buffer[0];
-
-  buffer1[0] = &buffer[0];
-
-  for (size_t i = 0; i < n; i++) {
-    ASSERT_TRUE(heap_walker.Allocation(reinterpret_cast<uintptr_t>(&buffer[i]),
-                                       reinterpret_cast<uintptr_t>(&buffer[i + 1])));
-  }
-
-  ALLOCATION(heap_walker, buffer1);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(n + 1, num_leaks);
-  EXPECT_EQ((n + 1) * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(1U, leaked.size());
-  EXPECT_EQ(n, leaked[0].referenced_count);
-  EXPECT_EQ(n * sizeof(uintptr_t), leaked[0].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, multipath) {
-  void* buffer1[2];
-  void* buffer2[1];
-  void* buffer3[1];
-  void* buffer4[1] = {nullptr};
-
-  //    1
-  //   / \
-  //  v   v
-  //  2   3
-  //   \ /
-  //    v
-  //    4
-
-  buffer1[0] = &buffer2;
-  buffer1[1] = &buffer3;
-  buffer2[0] = &buffer4;
-  buffer3[0] = &buffer4;
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-  ALLOCATION(heap_walker, buffer3);
-  ALLOCATION(heap_walker, buffer4);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(4U, num_leaks);
-  EXPECT_EQ(5 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(1U, leaked.size());
-  EXPECT_EQ(3U, leaked[0].referenced_count);
-  EXPECT_EQ(3 * sizeof(uintptr_t), leaked[0].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, multicycle) {
-  void* buffer1[2]{};
-  void* buffer2[2]{};
-  void* buffer3[2]{};
-  void* buffer4[2]{};
-
-  //    1
-  //   / ^
-  //  v   \
-  //  2 -> 3
-  //   \   ^
-  //    v /
-  //     4
-
-  buffer1[0] = &buffer2;
-  buffer2[0] = &buffer3;
-  buffer2[1] = &buffer4;
-  buffer3[0] = &buffer1;
-  buffer4[0] = &buffer3;
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-  ALLOCATION(heap_walker, buffer3);
-  ALLOCATION(heap_walker, buffer4);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(4U, num_leaks);
-  EXPECT_EQ(8 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(4U, leaked.size());
-  EXPECT_EQ(3U, leaked[0].referenced_count);
-  EXPECT_EQ(6 * sizeof(uintptr_t), leaked[0].referenced_size);
-  EXPECT_EQ(3U, leaked[1].referenced_count);
-  EXPECT_EQ(6 * sizeof(uintptr_t), leaked[1].referenced_size);
-  EXPECT_EQ(3U, leaked[2].referenced_count);
-  EXPECT_EQ(6 * sizeof(uintptr_t), leaked[2].referenced_size);
-  EXPECT_EQ(3U, leaked[3].referenced_count);
-  EXPECT_EQ(6 * sizeof(uintptr_t), leaked[3].referenced_size);
-}
-
-}  // namespace android
diff --git a/libmemunreachable/tests/MemUnreachable_test.cpp b/libmemunreachable/tests/MemUnreachable_test.cpp
deleted file mode 100644
index 9cb1623..0000000
--- a/libmemunreachable/tests/MemUnreachable_test.cpp
+++ /dev/null
@@ -1,276 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <fcntl.h>
-#include <stdlib.h>
-#include <sys/prctl.h>
-#include <unistd.h>
-
-#include <gtest/gtest.h>
-
-#include <memunreachable/memunreachable.h>
-
-#include "bionic.h"
-
-namespace android {
-
-class HiddenPointer {
- public:
-  // Since we're doing such a good job of hiding it, the static analyzer
-  // thinks that we're leaking this `malloc`. This is probably related to
-  // https://bugs.llvm.org/show_bug.cgi?id=34198. NOLINTNEXTLINE
-  explicit HiddenPointer(size_t size = 256) { Set(malloc(size)); }
-  ~HiddenPointer() { Free(); }
-  void* Get() { return reinterpret_cast<void*>(~ptr_); }
-  void Free() {
-    free(Get());
-    Set(nullptr);
-  }
-
- private:
-  void Set(void* ptr) { ptr_ = ~reinterpret_cast<uintptr_t>(ptr); }
-  volatile uintptr_t ptr_;
-};
-
-// Trick the compiler into thinking a value on the stack is still referenced.
-static void Ref(void** ptr) {
-  void** volatile storage;
-  storage = ptr;
-}
-
-class MemunreachableTest : public ::testing::Test {
- protected:
-  virtual void SetUp() {
-    CleanStack(8192);
-    CleanTcache();
-  }
-
-  virtual void TearDown() {
-    CleanStack(8192);
-    CleanTcache();
-  }
-
-  // Allocate a buffer on the stack and zero it to make sure there are no
-  // stray pointers from old test runs.
-  void __attribute__((noinline)) CleanStack(size_t size) {
-    void* buf = alloca(size);
-    memset(buf, 0, size);
-    Ref(&buf);
-  }
-
-  // Disable and re-enable malloc to flush the jemalloc tcache to make sure
-  // there are stray pointers from old test runs there.
-  void CleanTcache() {
-    malloc_disable();
-    malloc_enable();
-  }
-};
-
-TEST_F(MemunreachableTest, clean) {
-  UnreachableMemoryInfo info;
-
-  ASSERT_TRUE(LogUnreachableMemory(true, 100));
-
-  ASSERT_TRUE(GetUnreachableMemory(info));
-  ASSERT_EQ(0U, info.leaks.size());
-}
-
-TEST_F(MemunreachableTest, stack) {
-  HiddenPointer hidden_ptr;
-
-  {
-    void* ptr = hidden_ptr.Get();
-    Ref(&ptr);
-
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-
-    ptr = nullptr;
-  }
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(1U, info.leaks.size());
-  }
-
-  hidden_ptr.Free();
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-  }
-}
-
-void* g_ptr;
-
-TEST_F(MemunreachableTest, global) {
-  HiddenPointer hidden_ptr;
-
-  g_ptr = hidden_ptr.Get();
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-  }
-
-  g_ptr = nullptr;
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(1U, info.leaks.size());
-  }
-
-  hidden_ptr.Free();
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-  }
-}
-
-TEST_F(MemunreachableTest, tls) {
-  HiddenPointer hidden_ptr;
-  pthread_key_t key;
-  pthread_key_create(&key, nullptr);
-
-  pthread_setspecific(key, hidden_ptr.Get());
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-  }
-
-  pthread_setspecific(key, nullptr);
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(1U, info.leaks.size());
-  }
-
-  hidden_ptr.Free();
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-  }
-
-  pthread_key_delete(key);
-}
-
-TEST_F(MemunreachableTest, twice) {
-  HiddenPointer hidden_ptr;
-
-  {
-    void* ptr = hidden_ptr.Get();
-    Ref(&ptr);
-
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-
-    ptr = nullptr;
-  }
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(1U, info.leaks.size());
-  }
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(1U, info.leaks.size());
-  }
-
-  hidden_ptr.Free();
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-  }
-}
-
-TEST_F(MemunreachableTest, log) {
-  HiddenPointer hidden_ptr;
-
-  ASSERT_TRUE(LogUnreachableMemory(true, 100));
-
-  hidden_ptr.Free();
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-  }
-}
-
-TEST_F(MemunreachableTest, notdumpable) {
-  if (getuid() == 0) {
-    // TODO(ccross): make this a skipped test when gtest supports them
-    printf("[ SKIP     ] Not testable when running as root\n");
-    return;
-  }
-
-  ASSERT_EQ(0, prctl(PR_SET_DUMPABLE, 0));
-
-  HiddenPointer hidden_ptr;
-
-  EXPECT_FALSE(LogUnreachableMemory(true, 100));
-
-  ASSERT_EQ(0, prctl(PR_SET_DUMPABLE, 1));
-}
-
-TEST_F(MemunreachableTest, leak_lots) {
-  std::vector<HiddenPointer> hidden_ptrs;
-  hidden_ptrs.resize(1024);
-
-  ASSERT_TRUE(LogUnreachableMemory(true, 100));
-}
-
-TEST_F(MemunreachableTest, version) {
-  UnreachableMemoryInfo info;
-  info.version = 1;
-
-  ASSERT_FALSE(GetUnreachableMemory(info));
-  ASSERT_EQ(0U, info.leaks.size());
-}
-
-}  // namespace android
diff --git a/libmemunreachable/tests/ThreadCapture_test.cpp b/libmemunreachable/tests/ThreadCapture_test.cpp
deleted file mode 100644
index 933d65a..0000000
--- a/libmemunreachable/tests/ThreadCapture_test.cpp
+++ /dev/null
@@ -1,351 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "ThreadCapture.h"
-
-#include <fcntl.h>
-#include <pthread.h>
-#include <sys/syscall.h>
-#include <sys/types.h>
-
-#include <algorithm>
-#include <functional>
-#include <memory>
-#include <thread>
-
-#include <gtest/gtest.h>
-
-#include "Allocator.h"
-#include "ScopedDisableMalloc.h"
-#include "ScopedPipe.h"
-
-#include <android-base/threads.h>
-
-using namespace std::chrono_literals;
-
-namespace android {
-
-class ThreadListTest : public ::testing::TestWithParam<int> {
- public:
-  ThreadListTest() : stop_(false) {}
-
-  ~ThreadListTest() {
-    // pthread_join may return before the entry in /proc/pid/task/ is gone,
-    // loop until ListThreads only finds the main thread so the next test
-    // doesn't fail.
-    WaitForThreads();
-  }
-
-  virtual void TearDown() { ASSERT_TRUE(heap.empty()); }
-
- protected:
-  template <class Function>
-  void StartThreads(unsigned int threads, Function&& func) {
-    threads_.reserve(threads);
-    tids_.reserve(threads);
-    for (unsigned int i = 0; i < threads; i++) {
-      threads_.emplace_back([&, threads, this]() {
-        {
-          std::lock_guard<std::mutex> lk(m_);
-          tids_.push_back(gettid());
-          if (tids_.size() == threads) {
-            cv_start_.notify_one();
-          }
-        }
-
-        func();
-
-        {
-          std::unique_lock<std::mutex> lk(m_);
-          cv_stop_.wait(lk, [&] { return stop_; });
-        }
-      });
-    }
-
-    {
-      std::unique_lock<std::mutex> lk(m_);
-      cv_start_.wait(lk, [&] { return tids_.size() == threads; });
-    }
-  }
-
-  void StopThreads() {
-    {
-      std::lock_guard<std::mutex> lk(m_);
-      stop_ = true;
-    }
-    cv_stop_.notify_all();
-
-    for (auto i = threads_.begin(); i != threads_.end(); i++) {
-      i->join();
-    }
-    threads_.clear();
-    tids_.clear();
-  }
-
-  std::vector<pid_t>& tids() { return tids_; }
-
-  Heap heap;
-
- private:
-  void WaitForThreads() {
-    auto tids = TidList{heap};
-    ThreadCapture thread_capture{getpid(), heap};
-
-    for (unsigned int i = 0; i < 100; i++) {
-      EXPECT_TRUE(thread_capture.ListThreads(tids));
-      if (tids.size() == 1) {
-        break;
-      }
-      std::this_thread::sleep_for(10ms);
-    }
-    EXPECT_EQ(1U, tids.size());
-  }
-
-  std::mutex m_;
-  std::condition_variable cv_start_;
-  std::condition_variable cv_stop_;
-  bool stop_;
-  std::vector<pid_t> tids_;
-
-  std::vector<std::thread> threads_;
-};
-
-TEST_F(ThreadListTest, list_one) {
-  ScopedDisableMallocTimeout disable_malloc;
-
-  ThreadCapture thread_capture(getpid(), heap);
-
-  auto expected_tids = allocator::vector<pid_t>(1, getpid(), heap);
-  auto list_tids = allocator::vector<pid_t>(heap);
-
-  ASSERT_TRUE(thread_capture.ListThreads(list_tids));
-
-  ASSERT_EQ(expected_tids, list_tids);
-
-  if (!HasFailure()) {
-    ASSERT_FALSE(disable_malloc.timed_out());
-  }
-}
-
-TEST_P(ThreadListTest, list_some) {
-  const unsigned int threads = GetParam() - 1;
-
-  StartThreads(threads, []() {});
-  std::vector<pid_t> expected_tids = tids();
-  expected_tids.push_back(getpid());
-
-  auto list_tids = allocator::vector<pid_t>(heap);
-
-  {
-    ScopedDisableMallocTimeout disable_malloc;
-
-    ThreadCapture thread_capture(getpid(), heap);
-
-    ASSERT_TRUE(thread_capture.ListThreads(list_tids));
-
-    if (!HasFailure()) {
-      ASSERT_FALSE(disable_malloc.timed_out());
-    }
-  }
-
-  StopThreads();
-
-  std::sort(list_tids.begin(), list_tids.end());
-  std::sort(expected_tids.begin(), expected_tids.end());
-
-  ASSERT_EQ(expected_tids.size(), list_tids.size());
-  EXPECT_TRUE(std::equal(expected_tids.begin(), expected_tids.end(), list_tids.begin()));
-}
-
-INSTANTIATE_TEST_CASE_P(ThreadListTest, ThreadListTest, ::testing::Values(1, 2, 10, 1024));
-
-class ThreadCaptureTest : public ThreadListTest {
- public:
-  ThreadCaptureTest() {}
-  ~ThreadCaptureTest() {}
-  void Fork(std::function<void()>&& child_init, std::function<void()>&& child_cleanup,
-            std::function<void(pid_t)>&& parent) {
-    ScopedPipe start_pipe;
-    ScopedPipe stop_pipe;
-
-    int pid = fork();
-
-    if (pid == 0) {
-      // child
-      child_init();
-      EXPECT_EQ(1, TEMP_FAILURE_RETRY(write(start_pipe.Sender(), "+", 1))) << strerror(errno);
-      char buf;
-      EXPECT_EQ(1, TEMP_FAILURE_RETRY(read(stop_pipe.Receiver(), &buf, 1))) << strerror(errno);
-      child_cleanup();
-      _exit(0);
-    } else {
-      // parent
-      ASSERT_GT(pid, 0);
-      char buf;
-      ASSERT_EQ(1, TEMP_FAILURE_RETRY(read(start_pipe.Receiver(), &buf, 1))) << strerror(errno);
-
-      parent(pid);
-
-      ASSERT_EQ(1, TEMP_FAILURE_RETRY(write(stop_pipe.Sender(), "+", 1))) << strerror(errno);
-      siginfo_t info{};
-      ASSERT_EQ(0, TEMP_FAILURE_RETRY(waitid(P_PID, pid, &info, WEXITED))) << strerror(errno);
-    }
-  }
-};
-
-TEST_P(ThreadCaptureTest, capture_some) {
-  const unsigned int threads = GetParam();
-
-  Fork(
-      [&]() {
-        // child init
-        StartThreads(threads - 1, []() {});
-      },
-      [&]() {
-        // child cleanup
-        StopThreads();
-      },
-      [&](pid_t child) {
-        // parent
-        ASSERT_GT(child, 0);
-
-        {
-          ScopedDisableMallocTimeout disable_malloc;
-
-          ThreadCapture thread_capture(child, heap);
-          auto list_tids = allocator::vector<pid_t>(heap);
-
-          ASSERT_TRUE(thread_capture.ListThreads(list_tids));
-          ASSERT_EQ(threads, list_tids.size());
-
-          ASSERT_TRUE(thread_capture.CaptureThreads());
-
-          auto thread_info = allocator::vector<ThreadInfo>(heap);
-          ASSERT_TRUE(thread_capture.CapturedThreadInfo(thread_info));
-          ASSERT_EQ(threads, thread_info.size());
-          ASSERT_TRUE(thread_capture.ReleaseThreads());
-
-          if (!HasFailure()) {
-            ASSERT_FALSE(disable_malloc.timed_out());
-          }
-        }
-      });
-}
-
-INSTANTIATE_TEST_CASE_P(ThreadCaptureTest, ThreadCaptureTest, ::testing::Values(1, 2, 10, 1024));
-
-TEST_F(ThreadCaptureTest, capture_kill) {
-  int ret = fork();
-
-  if (ret == 0) {
-    // child
-    sleep(10);
-  } else {
-    // parent
-    ASSERT_GT(ret, 0);
-
-    {
-      ScopedDisableMallocTimeout disable_malloc;
-
-      ThreadCapture thread_capture(ret, heap);
-      thread_capture.InjectTestFunc([&](pid_t tid) {
-        tgkill(ret, tid, SIGKILL);
-        usleep(10000);
-      });
-      auto list_tids = allocator::vector<pid_t>(heap);
-
-      ASSERT_TRUE(thread_capture.ListThreads(list_tids));
-      ASSERT_EQ(1U, list_tids.size());
-
-      ASSERT_FALSE(thread_capture.CaptureThreads());
-
-      if (!HasFailure()) {
-        ASSERT_FALSE(disable_malloc.timed_out());
-      }
-    }
-  }
-}
-
-TEST_F(ThreadCaptureTest, capture_signal) {
-  const int sig = SIGUSR1;
-
-  ScopedPipe pipe;
-
-  // For signal handler
-  static ScopedPipe* g_pipe;
-
-  Fork(
-      [&]() {
-        // child init
-        pipe.CloseReceiver();
-
-        g_pipe = &pipe;
-
-        struct sigaction act {};
-        act.sa_handler = [](int) {
-          char buf = '+';
-          write(g_pipe->Sender(), &buf, 1);
-          g_pipe->CloseSender();
-        };
-        sigaction(sig, &act, NULL);
-        sigset_t set;
-        sigemptyset(&set);
-        sigaddset(&set, sig);
-        pthread_sigmask(SIG_UNBLOCK, &set, NULL);
-      },
-      [&]() {
-        // child cleanup
-        g_pipe = nullptr;
-        pipe.Close();
-      },
-      [&](pid_t child) {
-        // parent
-        ASSERT_GT(child, 0);
-        pipe.CloseSender();
-
-        {
-          ScopedDisableMallocTimeout disable_malloc;
-
-          ThreadCapture thread_capture(child, heap);
-          thread_capture.InjectTestFunc([&](pid_t tid) {
-            tgkill(child, tid, sig);
-            usleep(10000);
-          });
-          auto list_tids = allocator::vector<pid_t>(heap);
-
-          ASSERT_TRUE(thread_capture.ListThreads(list_tids));
-          ASSERT_EQ(1U, list_tids.size());
-
-          ASSERT_TRUE(thread_capture.CaptureThreads());
-
-          auto thread_info = allocator::vector<ThreadInfo>(heap);
-          ASSERT_TRUE(thread_capture.CapturedThreadInfo(thread_info));
-          ASSERT_EQ(1U, thread_info.size());
-          ASSERT_TRUE(thread_capture.ReleaseThreads());
-
-          usleep(100000);
-          char buf;
-          ASSERT_EQ(1, TEMP_FAILURE_RETRY(read(pipe.Receiver(), &buf, 1)));
-          ASSERT_EQ(buf, '+');
-
-          if (!HasFailure()) {
-            ASSERT_FALSE(disable_malloc.timed_out());
-          }
-        }
-      });
-}
-
-}  // namespace android
diff --git a/libmodprobe/include/modprobe/modprobe.h b/libmodprobe/include/modprobe/modprobe.h
index dcb4ffb..333fc55 100644
--- a/libmodprobe/include/modprobe/modprobe.h
+++ b/libmodprobe/include/modprobe/modprobe.h
@@ -19,13 +19,14 @@
 #include <set>
 #include <string>
 #include <unordered_map>
+#include <unordered_set>
 #include <vector>
 
 class Modprobe {
   public:
     Modprobe(const std::vector<std::string>&);
 
-    bool LoadListedModules();
+    bool LoadListedModules(bool strict = true);
     bool LoadWithAliases(const std::string& module_name, bool strict,
                          const std::string& parameters = "");
     bool Remove(const std::string& module_name);
@@ -59,5 +60,6 @@
     std::vector<std::string> module_load_;
     std::unordered_map<std::string, std::string> module_options_;
     std::set<std::string> module_blacklist_;
+    std::unordered_set<std::string> module_loaded_;
     bool blacklist_enabled = false;
 };
diff --git a/libmodprobe/libmodprobe.cpp b/libmodprobe/libmodprobe.cpp
index 73ae15b..6b9107f 100644
--- a/libmodprobe/libmodprobe.cpp
+++ b/libmodprobe/libmodprobe.cpp
@@ -330,7 +330,12 @@
 
 bool Modprobe::LoadWithAliases(const std::string& module_name, bool strict,
                                const std::string& parameters) {
-    std::set<std::string> modules_to_load = {MakeCanonical(module_name)};
+    auto canonical_name = MakeCanonical(module_name);
+    if (module_loaded_.count(canonical_name)) {
+        return true;
+    }
+
+    std::set<std::string> modules_to_load = {canonical_name};
     bool module_loaded = false;
 
     // use aliases to expand list of modules to load (multiple modules
@@ -338,6 +343,7 @@
     for (const auto& [alias, aliased_module] : module_aliases_) {
         if (fnmatch(alias.c_str(), module_name.c_str(), 0) != 0) continue;
         LOG(VERBOSE) << "Found alias for '" << module_name << "': '" << aliased_module;
+        if (module_loaded_.count(MakeCanonical(aliased_module))) continue;
         modules_to_load.emplace(aliased_module);
     }
 
@@ -354,13 +360,15 @@
     return true;
 }
 
-bool Modprobe::LoadListedModules() {
+bool Modprobe::LoadListedModules(bool strict) {
+    auto ret = true;
     for (const auto& module : module_load_) {
         if (!LoadWithAliases(module, true)) {
-            return false;
+            ret = false;
+            if (strict) break;
         }
     }
-    return true;
+    return ret;
 }
 
 bool Modprobe::Remove(const std::string& module_name) {
diff --git a/libmodprobe/libmodprobe_ext.cpp b/libmodprobe/libmodprobe_ext.cpp
index 2efcac2..8bebe4c 100644
--- a/libmodprobe/libmodprobe_ext.cpp
+++ b/libmodprobe/libmodprobe_ext.cpp
@@ -30,8 +30,9 @@
         return false;
     }
 
+    auto canonical_name = MakeCanonical(path_name);
     std::string options = "";
-    auto options_iter = module_options_.find(MakeCanonical(path_name));
+    auto options_iter = module_options_.find(canonical_name);
     if (options_iter != module_options_.end()) {
         options = options_iter->second;
     }
@@ -44,6 +45,7 @@
     if (ret != 0) {
         if (errno == EEXIST) {
             // Module already loaded
+            module_loaded_.emplace(canonical_name);
             return true;
         }
         LOG(ERROR) << "Failed to insmod '" << path_name << "' with args '" << options << "'";
@@ -51,15 +53,18 @@
     }
 
     LOG(INFO) << "Loaded kernel module " << path_name;
+    module_loaded_.emplace(canonical_name);
     return true;
 }
 
 bool Modprobe::Rmmod(const std::string& module_name) {
-    int ret = syscall(__NR_delete_module, MakeCanonical(module_name).c_str(), O_NONBLOCK);
+    auto canonical_name = MakeCanonical(module_name);
+    int ret = syscall(__NR_delete_module, canonical_name.c_str(), O_NONBLOCK);
     if (ret != 0) {
         PLOG(ERROR) << "Failed to remove module '" << module_name << "'";
         return false;
     }
+    module_loaded_.erase(canonical_name);
     return true;
 }
 
diff --git a/libnativebridge/.clang-format b/libnativebridge/.clang-format
deleted file mode 120000
index fd0645f..0000000
--- a/libnativebridge/.clang-format
+++ /dev/null
@@ -1 +0,0 @@
-../.clang-format-2
\ No newline at end of file
diff --git a/libnativebridge/Android.bp b/libnativebridge/Android.bp
deleted file mode 100644
index 10d42e4..0000000
--- a/libnativebridge/Android.bp
+++ /dev/null
@@ -1,61 +0,0 @@
-cc_defaults {
-    name: "libnativebridge-defaults",
-    cflags: [
-        "-Werror",
-        "-Wall",
-    ],
-    cppflags: [
-        "-fvisibility=protected",
-    ],
-    header_libs: ["libnativebridge-headers"],
-    export_header_lib_headers: ["libnativebridge-headers"],
-}
-
-cc_library_headers {
-    name: "libnativebridge-headers",
-
-    host_supported: true,
-    export_include_dirs: ["include"],
-}
-
-cc_library {
-    name: "libnativebridge",
-    defaults: ["libnativebridge-defaults"],
-
-    host_supported: true,
-    srcs: ["native_bridge.cc"],
-    header_libs: [
-        "libbase_headers",
-    ],
-    shared_libs: [
-        "liblog",
-    ],
-    // TODO(jiyong): remove this line after aosp/885921 lands
-    export_include_dirs: ["include"],
-
-    target: {
-        android: {
-            version_script: "libnativebridge.map.txt",
-        },
-        linux: {
-            version_script: "libnativebridge.map.txt",
-        },
-    },
-
-    stubs: {
-        symbol_file: "libnativebridge.map.txt",
-        versions: ["1"],
-    },
-}
-
-// TODO(b/124250621): eliminate the need for this library
-cc_library {
-    name: "libnativebridge_lazy",
-    defaults: ["libnativebridge-defaults"],
-
-    host_supported: false,
-    srcs: ["native_bridge_lazy.cc"],
-    required: ["libnativebridge"],
-}
-
-subdirs = ["tests"]
diff --git a/libnativebridge/OWNERS b/libnativebridge/OWNERS
deleted file mode 100644
index daf87f4..0000000
--- a/libnativebridge/OWNERS
+++ /dev/null
@@ -1,4 +0,0 @@
-dimitry@google.com
-eaeltsin@google.com
-ngeoffray@google.com
-oth@google.com
diff --git a/libnativebridge/include/nativebridge/native_bridge.h b/libnativebridge/include/nativebridge/native_bridge.h
deleted file mode 100644
index e9c9500..0000000
--- a/libnativebridge/include/nativebridge/native_bridge.h
+++ /dev/null
@@ -1,418 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef NATIVE_BRIDGE_H_
-#define NATIVE_BRIDGE_H_
-
-#include <signal.h>
-#include <stdbool.h>
-#include <stdint.h>
-#include <sys/types.h>
-
-#include "jni.h"
-
-#ifdef __cplusplus
-namespace android {
-extern "C" {
-#endif  // __cplusplus
-
-struct NativeBridgeRuntimeCallbacks;
-struct NativeBridgeRuntimeValues;
-
-// Function pointer type for sigaction. This is mostly the signature of a signal handler, except
-// for the return type. The runtime needs to know whether the signal was handled or should be given
-// to the chain.
-typedef bool (*NativeBridgeSignalHandlerFn)(int, siginfo_t*, void*);
-
-// Open the native bridge, if any. Should be called by Runtime::Init(). A null library filename
-// signals that we do not want to load a native bridge.
-bool LoadNativeBridge(const char* native_bridge_library_filename,
-                      const struct NativeBridgeRuntimeCallbacks* runtime_callbacks);
-
-// Quick check whether a native bridge will be needed. This is based off of the instruction set
-// of the process.
-bool NeedsNativeBridge(const char* instruction_set);
-
-// Do the early initialization part of the native bridge, if necessary. This should be done under
-// high privileges.
-bool PreInitializeNativeBridge(const char* app_data_dir, const char* instruction_set);
-
-// Initialize the native bridge, if any. Should be called by Runtime::DidForkFromZygote. The JNIEnv*
-// will be used to modify the app environment for the bridge.
-bool InitializeNativeBridge(JNIEnv* env, const char* instruction_set);
-
-// Unload the native bridge, if any. Should be called by Runtime::DidForkFromZygote.
-void UnloadNativeBridge();
-
-// Check whether a native bridge is available (opened or initialized). Requires a prior call to
-// LoadNativeBridge.
-bool NativeBridgeAvailable();
-
-// Check whether a native bridge is available (initialized). Requires a prior call to
-// LoadNativeBridge & InitializeNativeBridge.
-bool NativeBridgeInitialized();
-
-// Load a shared library that is supported by the native bridge.
-//
-// Starting with v3, NativeBridge has two scenarios: with/without namespace.
-// Use NativeBridgeLoadLibraryExt() instead in namespace scenario.
-void* NativeBridgeLoadLibrary(const char* libpath, int flag);
-
-// Get a native bridge trampoline for specified native method.
-void* NativeBridgeGetTrampoline(void* handle, const char* name, const char* shorty, uint32_t len);
-
-// True if native library paths are valid and is for an ABI that is supported by native bridge.
-// The *libpath* must point to a library.
-//
-// Starting with v3, NativeBridge has two scenarios: with/without namespace.
-// Use NativeBridgeIsPathSupported() instead in namespace scenario.
-bool NativeBridgeIsSupported(const char* libpath);
-
-// Returns the version number of the native bridge. This information is available after a
-// successful LoadNativeBridge() and before closing it, that is, as long as NativeBridgeAvailable()
-// returns true. Returns 0 otherwise.
-uint32_t NativeBridgeGetVersion();
-
-// Returns a signal handler that the bridge would like to be managed. Only valid for a native
-// bridge supporting the version 2 interface. Will return null if the bridge does not support
-// version 2, or if it doesn't have a signal handler it wants to be known.
-NativeBridgeSignalHandlerFn NativeBridgeGetSignalHandler(int signal);
-
-// Returns whether we have seen a native bridge error. This could happen because the library
-// was not found, rejected, could not be initialized and so on.
-//
-// This functionality is mainly for testing.
-bool NativeBridgeError();
-
-// Returns whether a given string is acceptable as a native bridge library filename.
-//
-// This functionality is exposed mainly for testing.
-bool NativeBridgeNameAcceptable(const char* native_bridge_library_filename);
-
-// Decrements the reference count on the dynamic library handler. If the reference count drops
-// to zero then the dynamic library is unloaded. Returns 0 on success and non-zero on error.
-int NativeBridgeUnloadLibrary(void* handle);
-
-// Get last error message of native bridge when fail to load library or search symbol.
-// This is reflection of dlerror() for native bridge.
-const char* NativeBridgeGetError();
-
-struct native_bridge_namespace_t;
-
-// True if native library paths are valid and is for an ABI that is supported by native bridge.
-// Different from NativeBridgeIsSupported(), the *path* here must be a directory containing
-// libraries of an ABI.
-//
-// Starting with v3, NativeBridge has two scenarios: with/without namespace.
-// Use NativeBridgeIsSupported() instead in non-namespace scenario.
-bool NativeBridgeIsPathSupported(const char* path);
-
-// Initializes anonymous namespace.
-// NativeBridge's peer of android_init_anonymous_namespace() of dynamic linker.
-//
-// The anonymous namespace is used in the case when a NativeBridge implementation
-// cannot identify the caller of dlopen/dlsym which happens for the code not loaded
-// by dynamic linker; for example calls from the mono-compiled code.
-//
-// Starting with v3, NativeBridge has two scenarios: with/without namespace.
-// Should not use in non-namespace scenario.
-bool NativeBridgeInitAnonymousNamespace(const char* public_ns_sonames,
-                                        const char* anon_ns_library_path);
-
-// Create new namespace in which native libraries will be loaded.
-// NativeBridge's peer of android_create_namespace() of dynamic linker.
-//
-// The libraries in the namespace are searched by folowing order:
-// 1. ld_library_path (Think of this as namespace-local LD_LIBRARY_PATH)
-// 2. In directories specified by DT_RUNPATH of the "needed by" binary.
-// 3. deault_library_path (This of this as namespace-local default library path)
-//
-// Starting with v3, NativeBridge has two scenarios: with/without namespace.
-// Should not use in non-namespace scenario.
-struct native_bridge_namespace_t* NativeBridgeCreateNamespace(
-    const char* name, const char* ld_library_path, const char* default_library_path, uint64_t type,
-    const char* permitted_when_isolated_path, struct native_bridge_namespace_t* parent_ns);
-
-// Creates a link which shares some libraries from one namespace to another.
-// NativeBridge's peer of android_link_namespaces() of dynamic linker.
-//
-// Starting with v3, NativeBridge has two scenarios: with/without namespace.
-// Should not use in non-namespace scenario.
-bool NativeBridgeLinkNamespaces(struct native_bridge_namespace_t* from,
-                                struct native_bridge_namespace_t* to,
-                                const char* shared_libs_sonames);
-
-// Load a shared library with namespace key that is supported by the native bridge.
-// NativeBridge's peer of android_dlopen_ext() of dynamic linker, only supports namespace
-// extension.
-//
-// Starting with v3, NativeBridge has two scenarios: with/without namespace.
-// Use NativeBridgeLoadLibrary() instead in non-namespace scenario.
-void* NativeBridgeLoadLibraryExt(const char* libpath, int flag,
-                                 struct native_bridge_namespace_t* ns);
-
-// Returns exported namespace by the name. This is a reflection of
-// android_get_exported_namespace function. Introduced in v5.
-struct native_bridge_namespace_t* NativeBridgeGetExportedNamespace(const char* name);
-
-// Native bridge interfaces to runtime.
-struct NativeBridgeCallbacks {
-  // Version number of the interface.
-  uint32_t version;
-
-  // Initialize native bridge. Native bridge's internal implementation must ensure MT safety and
-  // that the native bridge is initialized only once. Thus it is OK to call this interface for an
-  // already initialized native bridge.
-  //
-  // Parameters:
-  //   runtime_cbs [IN] the pointer to NativeBridgeRuntimeCallbacks.
-  // Returns:
-  //   true if initialization was successful.
-  bool (*initialize)(const struct NativeBridgeRuntimeCallbacks* runtime_cbs,
-                     const char* private_dir, const char* instruction_set);
-
-  // Load a shared library that is supported by the native bridge.
-  //
-  // Parameters:
-  //   libpath [IN] path to the shared library
-  //   flag [IN] the stardard RTLD_XXX defined in bionic dlfcn.h
-  // Returns:
-  //   The opaque handle of the shared library if sucessful, otherwise NULL
-  //
-  // Starting with v3, NativeBridge has two scenarios: with/without namespace.
-  // Use loadLibraryExt instead in namespace scenario.
-  void* (*loadLibrary)(const char* libpath, int flag);
-
-  // Get a native bridge trampoline for specified native method. The trampoline has same
-  // sigature as the native method.
-  //
-  // Parameters:
-  //   handle [IN] the handle returned from loadLibrary
-  //   shorty [IN] short descriptor of native method
-  //   len [IN] length of shorty
-  // Returns:
-  //   address of trampoline if successful, otherwise NULL
-  void* (*getTrampoline)(void* handle, const char* name, const char* shorty, uint32_t len);
-
-  // Check whether native library is valid and is for an ABI that is supported by native bridge.
-  //
-  // Parameters:
-  //   libpath [IN] path to the shared library
-  // Returns:
-  //   TRUE if library is supported by native bridge, FALSE otherwise
-  //
-  // Starting with v3, NativeBridge has two scenarios: with/without namespace.
-  // Use isPathSupported instead in namespace scenario.
-  bool (*isSupported)(const char* libpath);
-
-  // Provide environment values required by the app running with native bridge according to the
-  // instruction set.
-  //
-  // Parameters:
-  //   instruction_set [IN] the instruction set of the app
-  // Returns:
-  //   NULL if not supported by native bridge.
-  //   Otherwise, return all environment values to be set after fork.
-  const struct NativeBridgeRuntimeValues* (*getAppEnv)(const char* instruction_set);
-
-  // Added callbacks in version 2.
-
-  // Check whether the bridge is compatible with the given version. A bridge may decide not to be
-  // forwards- or backwards-compatible, and libnativebridge will then stop using it.
-  //
-  // Parameters:
-  //   bridge_version [IN] the version of libnativebridge.
-  // Returns:
-  //   true if the native bridge supports the given version of libnativebridge.
-  bool (*isCompatibleWith)(uint32_t bridge_version);
-
-  // A callback to retrieve a native bridge's signal handler for the specified signal. The runtime
-  // will ensure that the signal handler is being called after the runtime's own handler, but before
-  // all chained handlers. The native bridge should not try to install the handler by itself, as
-  // that will potentially lead to cycles.
-  //
-  // Parameters:
-  //   signal [IN] the signal for which the handler is asked for. Currently, only SIGSEGV is
-  //                 supported by the runtime.
-  // Returns:
-  //   NULL if the native bridge doesn't use a handler or doesn't want it to be managed by the
-  //   runtime.
-  //   Otherwise, a pointer to the signal handler.
-  NativeBridgeSignalHandlerFn (*getSignalHandler)(int signal);
-
-  // Added callbacks in version 3.
-
-  // Decrements the reference count on the dynamic library handler. If the reference count drops
-  // to zero then the dynamic library is unloaded.
-  //
-  // Parameters:
-  //   handle [IN] the handler of a dynamic library.
-  //
-  // Returns:
-  //   0 on success, and nonzero on error.
-  int (*unloadLibrary)(void* handle);
-
-  // Dump the last failure message of native bridge when fail to load library or search symbol.
-  //
-  // Parameters:
-  //
-  // Returns:
-  //   A string describing the most recent error that occurred when load library
-  //   or lookup symbol via native bridge.
-  const char* (*getError)();
-
-  // Check whether library paths are supported by native bridge.
-  //
-  // Parameters:
-  //   library_path [IN] search paths for native libraries (directories separated by ':')
-  // Returns:
-  //   TRUE if libraries within search paths are supported by native bridge, FALSE otherwise
-  //
-  // Starting with v3, NativeBridge has two scenarios: with/without namespace.
-  // Use isSupported instead in non-namespace scenario.
-  bool (*isPathSupported)(const char* library_path);
-
-  // Initializes anonymous namespace at native bridge side.
-  // NativeBridge's peer of android_init_anonymous_namespace() of dynamic linker.
-  //
-  // The anonymous namespace is used in the case when a NativeBridge implementation
-  // cannot identify the caller of dlopen/dlsym which happens for the code not loaded
-  // by dynamic linker; for example calls from the mono-compiled code.
-  //
-  // Parameters:
-  //   public_ns_sonames [IN] the name of "public" libraries.
-  //   anon_ns_library_path [IN] the library search path of (anonymous) namespace.
-  // Returns:
-  //   true if the pass is ok.
-  //   Otherwise, false.
-  //
-  // Starting with v3, NativeBridge has two scenarios: with/without namespace.
-  // Should not use in non-namespace scenario.
-  bool (*initAnonymousNamespace)(const char* public_ns_sonames, const char* anon_ns_library_path);
-
-  // Create new namespace in which native libraries will be loaded.
-  // NativeBridge's peer of android_create_namespace() of dynamic linker.
-  //
-  // Parameters:
-  //   name [IN] the name of the namespace.
-  //   ld_library_path [IN] the first set of library search paths of the namespace.
-  //   default_library_path [IN] the second set of library search path of the namespace.
-  //   type [IN] the attribute of the namespace.
-  //   permitted_when_isolated_path [IN] the permitted path for isolated namespace(if it is).
-  //   parent_ns [IN] the pointer of the parent namespace to be inherited from.
-  // Returns:
-  //   native_bridge_namespace_t* for created namespace or nullptr in the case of error.
-  //
-  // Starting with v3, NativeBridge has two scenarios: with/without namespace.
-  // Should not use in non-namespace scenario.
-  struct native_bridge_namespace_t* (*createNamespace)(const char* name,
-                                                       const char* ld_library_path,
-                                                       const char* default_library_path,
-                                                       uint64_t type,
-                                                       const char* permitted_when_isolated_path,
-                                                       struct native_bridge_namespace_t* parent_ns);
-
-  // Creates a link which shares some libraries from one namespace to another.
-  // NativeBridge's peer of android_link_namespaces() of dynamic linker.
-  //
-  // Parameters:
-  //   from [IN] the namespace where libraries are accessed.
-  //   to [IN] the namespace where libraries are loaded.
-  //   shared_libs_sonames [IN] the libraries to be shared.
-  //
-  // Returns:
-  //   Whether successed or not.
-  //
-  // Starting with v3, NativeBridge has two scenarios: with/without namespace.
-  // Should not use in non-namespace scenario.
-  bool (*linkNamespaces)(struct native_bridge_namespace_t* from,
-                         struct native_bridge_namespace_t* to, const char* shared_libs_sonames);
-
-  // Load a shared library within a namespace.
-  // NativeBridge's peer of android_dlopen_ext() of dynamic linker, only supports namespace
-  // extension.
-  //
-  // Parameters:
-  //   libpath [IN] path to the shared library
-  //   flag [IN] the stardard RTLD_XXX defined in bionic dlfcn.h
-  //   ns [IN] the pointer of the namespace in which the library should be loaded.
-  // Returns:
-  //   The opaque handle of the shared library if sucessful, otherwise NULL
-  //
-  // Starting with v3, NativeBridge has two scenarios: with/without namespace.
-  // Use loadLibrary instead in non-namespace scenario.
-  void* (*loadLibraryExt)(const char* libpath, int flag, struct native_bridge_namespace_t* ns);
-
-  // Get native bridge version of vendor namespace.
-  // The vendor namespace is the namespace used to load vendor public libraries.
-  // With O release this namespace can be different from the default namespace.
-  // For the devices without enable vendor namespaces this function should return null
-  //
-  // Returns:
-  //   vendor namespace or null if it was not set up for the device
-  //
-  // Starting with v5 (Android Q) this function is no longer used.
-  // Use getExportedNamespace() below.
-  struct native_bridge_namespace_t* (*getVendorNamespace)();
-
-  // Get native bridge version of exported namespace. Peer of
-  // android_get_exported_namespace(const char*) function.
-  //
-  // Returns:
-  //   exported namespace or null if it was not set up for the device
-  struct native_bridge_namespace_t* (*getExportedNamespace)(const char* name);
-};
-
-// Runtime interfaces to native bridge.
-struct NativeBridgeRuntimeCallbacks {
-  // Get shorty of a Java method. The shorty is supposed to be persistent in memory.
-  //
-  // Parameters:
-  //   env [IN] pointer to JNIenv.
-  //   mid [IN] Java methodID.
-  // Returns:
-  //   short descriptor for method.
-  const char* (*getMethodShorty)(JNIEnv* env, jmethodID mid);
-
-  // Get number of native methods for specified class.
-  //
-  // Parameters:
-  //   env [IN] pointer to JNIenv.
-  //   clazz [IN] Java class object.
-  // Returns:
-  //   number of native methods.
-  uint32_t (*getNativeMethodCount)(JNIEnv* env, jclass clazz);
-
-  // Get at most 'method_count' native methods for specified class 'clazz'. Results are outputed
-  // via 'methods' [OUT]. The signature pointer in JNINativeMethod is reused as the method shorty.
-  //
-  // Parameters:
-  //   env [IN] pointer to JNIenv.
-  //   clazz [IN] Java class object.
-  //   methods [OUT] array of method with the name, shorty, and fnPtr.
-  //   method_count [IN] max number of elements in methods.
-  // Returns:
-  //   number of method it actually wrote to methods.
-  uint32_t (*getNativeMethods)(JNIEnv* env, jclass clazz, JNINativeMethod* methods,
-                               uint32_t method_count);
-};
-
-#ifdef __cplusplus
-}  // extern "C"
-}  // namespace android
-#endif  // __cplusplus
-
-#endif  // NATIVE_BRIDGE_H_
diff --git a/libnativebridge/libnativebridge.map.txt b/libnativebridge/libnativebridge.map.txt
deleted file mode 100644
index a6841a3..0000000
--- a/libnativebridge/libnativebridge.map.txt
+++ /dev/null
@@ -1,45 +0,0 @@
-#
-# Copyright (C) 2019 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-#  Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# TODO(b/122710865): Most of these uses come from libnativeloader, which should be bundled
-# together with libnativebridge in the APEX. Once this happens, prune this list.
-LIBNATIVEBRIDGE_1 {
-  global:
-    NativeBridgeIsSupported;
-    NativeBridgeLoadLibrary;
-    NativeBridgeUnloadLibrary;
-    NativeBridgeGetError;
-    NativeBridgeIsPathSupported;
-    NativeBridgeCreateNamespace;
-    NativeBridgeGetExportedNamespace;
-    NativeBridgeLinkNamespaces;
-    NativeBridgeLoadLibraryExt;
-    NativeBridgeInitAnonymousNamespace;
-    NativeBridgeInitialized;
-    NativeBridgeGetTrampoline;
-    LoadNativeBridge;
-    PreInitializeNativeBridge;
-    InitializeNativeBridge;
-    NativeBridgeGetVersion;
-    NativeBridgeGetSignalHandler;
-    UnloadNativeBridge;
-    NativeBridgeAvailable;
-    NeedsNativeBridge;
-    NativeBridgeError;
-    NativeBridgeNameAcceptable;
-  local:
-    *;
-};
diff --git a/libnativebridge/native_bridge.cc b/libnativebridge/native_bridge.cc
deleted file mode 100644
index 9adba9a..0000000
--- a/libnativebridge/native_bridge.cc
+++ /dev/null
@@ -1,646 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "nativebridge"
-
-#include "nativebridge/native_bridge.h"
-
-#include <dlfcn.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <sys/mount.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
-#include <cstring>
-
-#include <android-base/macros.h>
-#include <log/log.h>
-
-namespace android {
-
-#ifdef __APPLE__
-template <typename T>
-void UNUSED(const T&) {}
-#endif
-
-extern "C" {
-
-// Environment values required by the apps running with native bridge.
-struct NativeBridgeRuntimeValues {
-    const char* os_arch;
-    const char* cpu_abi;
-    const char* cpu_abi2;
-    const char* *supported_abis;
-    int32_t abi_count;
-};
-
-// The symbol name exposed by native-bridge with the type of NativeBridgeCallbacks.
-static constexpr const char* kNativeBridgeInterfaceSymbol = "NativeBridgeItf";
-
-enum class NativeBridgeState {
-  kNotSetup,                        // Initial state.
-  kOpened,                          // After successful dlopen.
-  kPreInitialized,                  // After successful pre-initialization.
-  kInitialized,                     // After successful initialization.
-  kClosed                           // Closed or errors.
-};
-
-static constexpr const char* kNotSetupString = "kNotSetup";
-static constexpr const char* kOpenedString = "kOpened";
-static constexpr const char* kPreInitializedString = "kPreInitialized";
-static constexpr const char* kInitializedString = "kInitialized";
-static constexpr const char* kClosedString = "kClosed";
-
-static const char* GetNativeBridgeStateString(NativeBridgeState state) {
-  switch (state) {
-    case NativeBridgeState::kNotSetup:
-      return kNotSetupString;
-
-    case NativeBridgeState::kOpened:
-      return kOpenedString;
-
-    case NativeBridgeState::kPreInitialized:
-      return kPreInitializedString;
-
-    case NativeBridgeState::kInitialized:
-      return kInitializedString;
-
-    case NativeBridgeState::kClosed:
-      return kClosedString;
-  }
-}
-
-// Current state of the native bridge.
-static NativeBridgeState state = NativeBridgeState::kNotSetup;
-
-// The version of NativeBridge implementation.
-// Different Nativebridge interface needs the service of different version of
-// Nativebridge implementation.
-// Used by isCompatibleWith() which is introduced in v2.
-enum NativeBridgeImplementationVersion {
-  // first version, not used.
-  DEFAULT_VERSION = 1,
-  // The version which signal semantic is introduced.
-  SIGNAL_VERSION = 2,
-  // The version which namespace semantic is introduced.
-  NAMESPACE_VERSION = 3,
-  // The version with vendor namespaces
-  VENDOR_NAMESPACE_VERSION = 4,
-  // The version with runtime namespaces
-  RUNTIME_NAMESPACE_VERSION = 5,
-};
-
-// Whether we had an error at some point.
-static bool had_error = false;
-
-// Handle of the loaded library.
-static void* native_bridge_handle = nullptr;
-// Pointer to the callbacks. Available as soon as LoadNativeBridge succeeds, but only initialized
-// later.
-static const NativeBridgeCallbacks* callbacks = nullptr;
-// Callbacks provided by the environment to the bridge. Passed to LoadNativeBridge.
-static const NativeBridgeRuntimeCallbacks* runtime_callbacks = nullptr;
-
-// The app's code cache directory.
-static char* app_code_cache_dir = nullptr;
-
-// Code cache directory (relative to the application private directory)
-// Ideally we'd like to call into framework to retrieve this name. However that's considered an
-// implementation detail and will require either hacks or consistent refactorings. We compromise
-// and hard code the directory name again here.
-static constexpr const char* kCodeCacheDir = "code_cache";
-
-// Characters allowed in a native bridge filename. The first character must
-// be in [a-zA-Z] (expected 'l' for "libx"). The rest must be in [a-zA-Z0-9._-].
-static bool CharacterAllowed(char c, bool first) {
-  if (first) {
-    return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
-  } else {
-    return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') ||
-           (c == '.') || (c == '_') || (c == '-');
-  }
-}
-
-static void ReleaseAppCodeCacheDir() {
-  if (app_code_cache_dir != nullptr) {
-    delete[] app_code_cache_dir;
-    app_code_cache_dir = nullptr;
-  }
-}
-
-// We only allow simple names for the library. It is supposed to be a file in
-// /system/lib or /vendor/lib. Only allow a small range of characters, that is
-// names consisting of [a-zA-Z0-9._-] and starting with [a-zA-Z].
-bool NativeBridgeNameAcceptable(const char* nb_library_filename) {
-  const char* ptr = nb_library_filename;
-  if (*ptr == 0) {
-    // Emptry string. Allowed, means no native bridge.
-    return true;
-  } else {
-    // First character must be [a-zA-Z].
-    if (!CharacterAllowed(*ptr, true))  {
-      // Found an invalid fist character, don't accept.
-      ALOGE("Native bridge library %s has been rejected for first character %c",
-            nb_library_filename,
-            *ptr);
-      return false;
-    } else {
-      // For the rest, be more liberal.
-      ptr++;
-      while (*ptr != 0) {
-        if (!CharacterAllowed(*ptr, false)) {
-          // Found an invalid character, don't accept.
-          ALOGE("Native bridge library %s has been rejected for %c", nb_library_filename, *ptr);
-          return false;
-        }
-        ptr++;
-      }
-    }
-    return true;
-  }
-}
-
-// The policy of invoking Nativebridge changed in v3 with/without namespace.
-// Suggest Nativebridge implementation not maintain backward-compatible.
-static bool isCompatibleWith(const uint32_t version) {
-  // Libnativebridge is now designed to be forward-compatible. So only "0" is an unsupported
-  // version.
-  if (callbacks == nullptr || callbacks->version == 0 || version == 0) {
-    return false;
-  }
-
-  // If this is a v2+ bridge, it may not be forwards- or backwards-compatible. Check.
-  if (callbacks->version >= SIGNAL_VERSION) {
-    return callbacks->isCompatibleWith(version);
-  }
-
-  return true;
-}
-
-static void CloseNativeBridge(bool with_error) {
-  state = NativeBridgeState::kClosed;
-  had_error |= with_error;
-  ReleaseAppCodeCacheDir();
-}
-
-bool LoadNativeBridge(const char* nb_library_filename,
-                      const NativeBridgeRuntimeCallbacks* runtime_cbs) {
-  // We expect only one place that calls LoadNativeBridge: Runtime::Init. At that point we are not
-  // multi-threaded, so we do not need locking here.
-
-  if (state != NativeBridgeState::kNotSetup) {
-    // Setup has been called before. Ignore this call.
-    if (nb_library_filename != nullptr) {  // Avoids some log-spam for dalvikvm.
-      ALOGW("Called LoadNativeBridge for an already set up native bridge. State is %s.",
-            GetNativeBridgeStateString(state));
-    }
-    // Note: counts as an error, even though the bridge may be functional.
-    had_error = true;
-    return false;
-  }
-
-  if (nb_library_filename == nullptr || *nb_library_filename == 0) {
-    CloseNativeBridge(false);
-    return false;
-  } else {
-    if (!NativeBridgeNameAcceptable(nb_library_filename)) {
-      CloseNativeBridge(true);
-    } else {
-      // Try to open the library.
-      void* handle = dlopen(nb_library_filename, RTLD_LAZY);
-      if (handle != nullptr) {
-        callbacks = reinterpret_cast<NativeBridgeCallbacks*>(dlsym(handle,
-                                                                   kNativeBridgeInterfaceSymbol));
-        if (callbacks != nullptr) {
-          if (isCompatibleWith(NAMESPACE_VERSION)) {
-            // Store the handle for later.
-            native_bridge_handle = handle;
-          } else {
-            callbacks = nullptr;
-            dlclose(handle);
-            ALOGW("Unsupported native bridge interface.");
-          }
-        } else {
-          dlclose(handle);
-        }
-      }
-
-      // Two failure conditions: could not find library (dlopen failed), or could not find native
-      // bridge interface (dlsym failed). Both are an error and close the native bridge.
-      if (callbacks == nullptr) {
-        CloseNativeBridge(true);
-      } else {
-        runtime_callbacks = runtime_cbs;
-        state = NativeBridgeState::kOpened;
-      }
-    }
-    return state == NativeBridgeState::kOpened;
-  }
-}
-
-bool NeedsNativeBridge(const char* instruction_set) {
-  if (instruction_set == nullptr) {
-    ALOGE("Null instruction set in NeedsNativeBridge.");
-    return false;
-  }
-  return strncmp(instruction_set, ABI_STRING, strlen(ABI_STRING) + 1) != 0;
-}
-
-bool PreInitializeNativeBridge(const char* app_data_dir_in, const char* instruction_set) {
-  if (state != NativeBridgeState::kOpened) {
-    ALOGE("Invalid state: native bridge is expected to be opened.");
-    CloseNativeBridge(true);
-    return false;
-  }
-
-  if (app_data_dir_in == nullptr) {
-    ALOGE("Application private directory cannot be null.");
-    CloseNativeBridge(true);
-    return false;
-  }
-
-  // Create the path to the application code cache directory.
-  // The memory will be release after Initialization or when the native bridge is closed.
-  const size_t len = strlen(app_data_dir_in) + strlen(kCodeCacheDir) + 2; // '\0' + '/'
-  app_code_cache_dir = new char[len];
-  snprintf(app_code_cache_dir, len, "%s/%s", app_data_dir_in, kCodeCacheDir);
-
-  // Bind-mount /system/lib{,64}/<isa>/cpuinfo to /proc/cpuinfo.
-  // Failure is not fatal and will keep the native bridge in kPreInitialized.
-  state = NativeBridgeState::kPreInitialized;
-
-#ifndef __APPLE__
-  if (instruction_set == nullptr) {
-    return true;
-  }
-  size_t isa_len = strlen(instruction_set);
-  if (isa_len > 10) {
-    // 10 is a loose upper bound on the currently known instruction sets (a tight bound is 7 for
-    // x86_64 [including the trailing \0]). This is so we don't have to change here if there will
-    // be another instruction set in the future.
-    ALOGW("Instruction set %s is malformed, must be less than or equal to 10 characters.",
-          instruction_set);
-    return true;
-  }
-
-  // If the file does not exist, the mount command will fail,
-  // so we save the extra file existence check.
-  char cpuinfo_path[1024];
-
-#if defined(__ANDROID__)
-  snprintf(cpuinfo_path, sizeof(cpuinfo_path), "/system/lib"
-#ifdef __LP64__
-      "64"
-#endif  // __LP64__
-      "/%s/cpuinfo", instruction_set);
-#else   // !__ANDROID__
-  // To be able to test on the host, we hardwire a relative path.
-  snprintf(cpuinfo_path, sizeof(cpuinfo_path), "./cpuinfo");
-#endif
-
-  // Bind-mount.
-  if (TEMP_FAILURE_RETRY(mount(cpuinfo_path,        // Source.
-                               "/proc/cpuinfo",     // Target.
-                               nullptr,             // FS type.
-                               MS_BIND,             // Mount flags: bind mount.
-                               nullptr)) == -1) {   // "Data."
-    ALOGW("Failed to bind-mount %s as /proc/cpuinfo: %s", cpuinfo_path, strerror(errno));
-  }
-#else  // __APPLE__
-  UNUSED(instruction_set);
-  ALOGW("Mac OS does not support bind-mounting. Host simulation of native bridge impossible.");
-#endif
-
-  return true;
-}
-
-static void SetCpuAbi(JNIEnv* env, jclass build_class, const char* field, const char* value) {
-  if (value != nullptr) {
-    jfieldID field_id = env->GetStaticFieldID(build_class, field, "Ljava/lang/String;");
-    if (field_id == nullptr) {
-      env->ExceptionClear();
-      ALOGW("Could not find %s field.", field);
-      return;
-    }
-
-    jstring str = env->NewStringUTF(value);
-    if (str == nullptr) {
-      env->ExceptionClear();
-      ALOGW("Could not create string %s.", value);
-      return;
-    }
-
-    env->SetStaticObjectField(build_class, field_id, str);
-  }
-}
-
-// Set up the environment for the bridged app.
-static void SetupEnvironment(const NativeBridgeCallbacks* callbacks, JNIEnv* env, const char* isa) {
-  // Need a JNIEnv* to do anything.
-  if (env == nullptr) {
-    ALOGW("No JNIEnv* to set up app environment.");
-    return;
-  }
-
-  // Query the bridge for environment values.
-  const struct NativeBridgeRuntimeValues* env_values = callbacks->getAppEnv(isa);
-  if (env_values == nullptr) {
-    return;
-  }
-
-  // Keep the JNIEnv clean.
-  jint success = env->PushLocalFrame(16);  // That should be small and large enough.
-  if (success < 0) {
-    // Out of memory, really borked.
-    ALOGW("Out of memory while setting up app environment.");
-    env->ExceptionClear();
-    return;
-  }
-
-  // Reset CPU_ABI & CPU_ABI2 to values required by the apps running with native bridge.
-  if (env_values->cpu_abi != nullptr || env_values->cpu_abi2 != nullptr ||
-      env_values->abi_count >= 0) {
-    jclass bclass_id = env->FindClass("android/os/Build");
-    if (bclass_id != nullptr) {
-      SetCpuAbi(env, bclass_id, "CPU_ABI", env_values->cpu_abi);
-      SetCpuAbi(env, bclass_id, "CPU_ABI2", env_values->cpu_abi2);
-    } else {
-      // For example in a host test environment.
-      env->ExceptionClear();
-      ALOGW("Could not find Build class.");
-    }
-  }
-
-  if (env_values->os_arch != nullptr) {
-    jclass sclass_id = env->FindClass("java/lang/System");
-    if (sclass_id != nullptr) {
-      jmethodID set_prop_id = env->GetStaticMethodID(sclass_id, "setUnchangeableSystemProperty",
-          "(Ljava/lang/String;Ljava/lang/String;)V");
-      if (set_prop_id != nullptr) {
-        // Init os.arch to the value reqired by the apps running with native bridge.
-        env->CallStaticVoidMethod(sclass_id, set_prop_id, env->NewStringUTF("os.arch"),
-            env->NewStringUTF(env_values->os_arch));
-      } else {
-        env->ExceptionClear();
-        ALOGW("Could not find System#setUnchangeableSystemProperty.");
-      }
-    } else {
-      env->ExceptionClear();
-      ALOGW("Could not find System class.");
-    }
-  }
-
-  // Make it pristine again.
-  env->PopLocalFrame(nullptr);
-}
-
-bool InitializeNativeBridge(JNIEnv* env, const char* instruction_set) {
-  // We expect only one place that calls InitializeNativeBridge: Runtime::DidForkFromZygote. At that
-  // point we are not multi-threaded, so we do not need locking here.
-
-  if (state == NativeBridgeState::kPreInitialized) {
-    // Check for code cache: if it doesn't exist try to create it.
-    struct stat st;
-    if (stat(app_code_cache_dir, &st) == -1) {
-      if (errno == ENOENT) {
-        if (mkdir(app_code_cache_dir, S_IRWXU | S_IRWXG | S_IXOTH) == -1) {
-          ALOGW("Cannot create code cache directory %s: %s.", app_code_cache_dir, strerror(errno));
-          ReleaseAppCodeCacheDir();
-        }
-      } else {
-        ALOGW("Cannot stat code cache directory %s: %s.", app_code_cache_dir, strerror(errno));
-        ReleaseAppCodeCacheDir();
-      }
-    } else if (!S_ISDIR(st.st_mode)) {
-      ALOGW("Code cache is not a directory %s.", app_code_cache_dir);
-      ReleaseAppCodeCacheDir();
-    }
-
-    // If we're still PreInitialized (dind't fail the code cache checks) try to initialize.
-    if (state == NativeBridgeState::kPreInitialized) {
-      if (callbacks->initialize(runtime_callbacks, app_code_cache_dir, instruction_set)) {
-        SetupEnvironment(callbacks, env, instruction_set);
-        state = NativeBridgeState::kInitialized;
-        // We no longer need the code cache path, release the memory.
-        ReleaseAppCodeCacheDir();
-      } else {
-        // Unload the library.
-        dlclose(native_bridge_handle);
-        CloseNativeBridge(true);
-      }
-    }
-  } else {
-    CloseNativeBridge(true);
-  }
-
-  return state == NativeBridgeState::kInitialized;
-}
-
-void UnloadNativeBridge() {
-  // We expect only one place that calls UnloadNativeBridge: Runtime::DidForkFromZygote. At that
-  // point we are not multi-threaded, so we do not need locking here.
-
-  switch(state) {
-    case NativeBridgeState::kOpened:
-    case NativeBridgeState::kPreInitialized:
-    case NativeBridgeState::kInitialized:
-      // Unload.
-      dlclose(native_bridge_handle);
-      CloseNativeBridge(false);
-      break;
-
-    case NativeBridgeState::kNotSetup:
-      // Not even set up. Error.
-      CloseNativeBridge(true);
-      break;
-
-    case NativeBridgeState::kClosed:
-      // Ignore.
-      break;
-  }
-}
-
-bool NativeBridgeError() {
-  return had_error;
-}
-
-bool NativeBridgeAvailable() {
-  return state == NativeBridgeState::kOpened
-      || state == NativeBridgeState::kPreInitialized
-      || state == NativeBridgeState::kInitialized;
-}
-
-bool NativeBridgeInitialized() {
-  // Calls of this are supposed to happen in a state where the native bridge is stable, i.e., after
-  // Runtime::DidForkFromZygote. In that case we do not need a lock.
-  return state == NativeBridgeState::kInitialized;
-}
-
-void* NativeBridgeLoadLibrary(const char* libpath, int flag) {
-  if (NativeBridgeInitialized()) {
-    return callbacks->loadLibrary(libpath, flag);
-  }
-  return nullptr;
-}
-
-void* NativeBridgeGetTrampoline(void* handle, const char* name, const char* shorty,
-                                uint32_t len) {
-  if (NativeBridgeInitialized()) {
-    return callbacks->getTrampoline(handle, name, shorty, len);
-  }
-  return nullptr;
-}
-
-bool NativeBridgeIsSupported(const char* libpath) {
-  if (NativeBridgeInitialized()) {
-    return callbacks->isSupported(libpath);
-  }
-  return false;
-}
-
-uint32_t NativeBridgeGetVersion() {
-  if (NativeBridgeAvailable()) {
-    return callbacks->version;
-  }
-  return 0;
-}
-
-NativeBridgeSignalHandlerFn NativeBridgeGetSignalHandler(int signal) {
-  if (NativeBridgeInitialized()) {
-    if (isCompatibleWith(SIGNAL_VERSION)) {
-      return callbacks->getSignalHandler(signal);
-    } else {
-      ALOGE("not compatible with version %d, cannot get signal handler", SIGNAL_VERSION);
-    }
-  }
-  return nullptr;
-}
-
-int NativeBridgeUnloadLibrary(void* handle) {
-  if (NativeBridgeInitialized()) {
-    if (isCompatibleWith(NAMESPACE_VERSION)) {
-      return callbacks->unloadLibrary(handle);
-    } else {
-      ALOGE("not compatible with version %d, cannot unload library", NAMESPACE_VERSION);
-    }
-  }
-  return -1;
-}
-
-const char* NativeBridgeGetError() {
-  if (NativeBridgeInitialized()) {
-    if (isCompatibleWith(NAMESPACE_VERSION)) {
-      return callbacks->getError();
-    } else {
-      return "native bridge implementation is not compatible with version 3, cannot get message";
-    }
-  }
-  return "native bridge is not initialized";
-}
-
-bool NativeBridgeIsPathSupported(const char* path) {
-  if (NativeBridgeInitialized()) {
-    if (isCompatibleWith(NAMESPACE_VERSION)) {
-      return callbacks->isPathSupported(path);
-    } else {
-      ALOGE("not compatible with version %d, cannot check via library path", NAMESPACE_VERSION);
-    }
-  }
-  return false;
-}
-
-bool NativeBridgeInitAnonymousNamespace(const char* public_ns_sonames,
-                                        const char* anon_ns_library_path) {
-  if (NativeBridgeInitialized()) {
-    if (isCompatibleWith(NAMESPACE_VERSION)) {
-      return callbacks->initAnonymousNamespace(public_ns_sonames, anon_ns_library_path);
-    } else {
-      ALOGE("not compatible with version %d, cannot init namespace", NAMESPACE_VERSION);
-    }
-  }
-
-  return false;
-}
-
-native_bridge_namespace_t* NativeBridgeCreateNamespace(const char* name,
-                                                       const char* ld_library_path,
-                                                       const char* default_library_path,
-                                                       uint64_t type,
-                                                       const char* permitted_when_isolated_path,
-                                                       native_bridge_namespace_t* parent_ns) {
-  if (NativeBridgeInitialized()) {
-    if (isCompatibleWith(NAMESPACE_VERSION)) {
-      return callbacks->createNamespace(name,
-                                        ld_library_path,
-                                        default_library_path,
-                                        type,
-                                        permitted_when_isolated_path,
-                                        parent_ns);
-    } else {
-      ALOGE("not compatible with version %d, cannot create namespace %s", NAMESPACE_VERSION, name);
-    }
-  }
-
-  return nullptr;
-}
-
-bool NativeBridgeLinkNamespaces(native_bridge_namespace_t* from, native_bridge_namespace_t* to,
-                                const char* shared_libs_sonames) {
-  if (NativeBridgeInitialized()) {
-    if (isCompatibleWith(NAMESPACE_VERSION)) {
-      return callbacks->linkNamespaces(from, to, shared_libs_sonames);
-    } else {
-      ALOGE("not compatible with version %d, cannot init namespace", NAMESPACE_VERSION);
-    }
-  }
-
-  return false;
-}
-
-native_bridge_namespace_t* NativeBridgeGetExportedNamespace(const char* name) {
-  if (!NativeBridgeInitialized()) {
-    return nullptr;
-  }
-
-  if (isCompatibleWith(RUNTIME_NAMESPACE_VERSION)) {
-    return callbacks->getExportedNamespace(name);
-  }
-
-  // sphal is vendor namespace name -> use v4 callback in the case NB callbacks
-  // are not compatible with v5
-  if (isCompatibleWith(VENDOR_NAMESPACE_VERSION) && name != nullptr && strcmp("sphal", name) == 0) {
-    return callbacks->getVendorNamespace();
-  }
-
-  return nullptr;
-}
-
-void* NativeBridgeLoadLibraryExt(const char* libpath, int flag, native_bridge_namespace_t* ns) {
-  if (NativeBridgeInitialized()) {
-    if (isCompatibleWith(NAMESPACE_VERSION)) {
-      return callbacks->loadLibraryExt(libpath, flag, ns);
-    } else {
-      ALOGE("not compatible with version %d, cannot load library in namespace", NAMESPACE_VERSION);
-    }
-  }
-  return nullptr;
-}
-
-}  // extern "C"
-
-}  // namespace android
diff --git a/libnativebridge/native_bridge_lazy.cc b/libnativebridge/native_bridge_lazy.cc
deleted file mode 100644
index 94c8084..0000000
--- a/libnativebridge/native_bridge_lazy.cc
+++ /dev/null
@@ -1,167 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "nativebridge/native_bridge.h"
-#define LOG_TAG "nativebridge"
-
-#include <dlfcn.h>
-#include <errno.h>
-#include <string.h>
-
-#include <log/log.h>
-
-namespace android {
-
-namespace {
-
-void* GetLibHandle() {
-  static void* handle = dlopen("libnativebridge.so", RTLD_NOW);
-  LOG_FATAL_IF(handle == nullptr, "Failed to load libnativebridge.so: %s", dlerror());
-  return handle;
-}
-
-template <typename FuncPtr>
-FuncPtr GetFuncPtr(const char* function_name) {
-  auto f = reinterpret_cast<FuncPtr>(dlsym(GetLibHandle(), function_name));
-  LOG_FATAL_IF(f == nullptr, "Failed to get address of %s: %s", function_name, dlerror());
-  return f;
-}
-
-#define GET_FUNC_PTR(name) GetFuncPtr<decltype(&name)>(#name)
-
-}  // namespace
-
-bool LoadNativeBridge(const char* native_bridge_library_filename,
-                      const struct NativeBridgeRuntimeCallbacks* runtime_callbacks) {
-  static auto f = GET_FUNC_PTR(LoadNativeBridge);
-  return f(native_bridge_library_filename, runtime_callbacks);
-}
-
-bool NeedsNativeBridge(const char* instruction_set) {
-  static auto f = GET_FUNC_PTR(NeedsNativeBridge);
-  return f(instruction_set);
-}
-
-bool PreInitializeNativeBridge(const char* app_data_dir, const char* instruction_set) {
-  static auto f = GET_FUNC_PTR(PreInitializeNativeBridge);
-  return f(app_data_dir, instruction_set);
-}
-
-bool InitializeNativeBridge(JNIEnv* env, const char* instruction_set) {
-  static auto f = GET_FUNC_PTR(InitializeNativeBridge);
-  return f(env, instruction_set);
-}
-
-void UnloadNativeBridge() {
-  static auto f = GET_FUNC_PTR(UnloadNativeBridge);
-  return f();
-}
-
-bool NativeBridgeAvailable() {
-  static auto f = GET_FUNC_PTR(NativeBridgeAvailable);
-  return f();
-}
-
-bool NativeBridgeInitialized() {
-  static auto f = GET_FUNC_PTR(NativeBridgeInitialized);
-  return f();
-}
-
-void* NativeBridgeLoadLibrary(const char* libpath, int flag) {
-  static auto f = GET_FUNC_PTR(NativeBridgeLoadLibrary);
-  return f(libpath, flag);
-}
-
-void* NativeBridgeGetTrampoline(void* handle, const char* name, const char* shorty, uint32_t len) {
-  static auto f = GET_FUNC_PTR(NativeBridgeGetTrampoline);
-  return f(handle, name, shorty, len);
-}
-
-bool NativeBridgeIsSupported(const char* libpath) {
-  static auto f = GET_FUNC_PTR(NativeBridgeIsSupported);
-  return f(libpath);
-}
-
-uint32_t NativeBridgeGetVersion() {
-  static auto f = GET_FUNC_PTR(NativeBridgeGetVersion);
-  return f();
-}
-
-NativeBridgeSignalHandlerFn NativeBridgeGetSignalHandler(int signal) {
-  static auto f = GET_FUNC_PTR(NativeBridgeGetSignalHandler);
-  return f(signal);
-}
-
-bool NativeBridgeError() {
-  static auto f = GET_FUNC_PTR(NativeBridgeError);
-  return f();
-}
-
-bool NativeBridgeNameAcceptable(const char* native_bridge_library_filename) {
-  static auto f = GET_FUNC_PTR(NativeBridgeNameAcceptable);
-  return f(native_bridge_library_filename);
-}
-
-int NativeBridgeUnloadLibrary(void* handle) {
-  static auto f = GET_FUNC_PTR(NativeBridgeUnloadLibrary);
-  return f(handle);
-}
-
-const char* NativeBridgeGetError() {
-  static auto f = GET_FUNC_PTR(NativeBridgeGetError);
-  return f();
-}
-
-bool NativeBridgeIsPathSupported(const char* path) {
-  static auto f = GET_FUNC_PTR(NativeBridgeIsPathSupported);
-  return f(path);
-}
-
-bool NativeBridgeInitAnonymousNamespace(const char* public_ns_sonames,
-                                        const char* anon_ns_library_path) {
-  static auto f = GET_FUNC_PTR(NativeBridgeInitAnonymousNamespace);
-  return f(public_ns_sonames, anon_ns_library_path);
-}
-
-struct native_bridge_namespace_t* NativeBridgeCreateNamespace(
-    const char* name, const char* ld_library_path, const char* default_library_path, uint64_t type,
-    const char* permitted_when_isolated_path, struct native_bridge_namespace_t* parent_ns) {
-  static auto f = GET_FUNC_PTR(NativeBridgeCreateNamespace);
-  return f(name, ld_library_path, default_library_path, type, permitted_when_isolated_path,
-           parent_ns);
-}
-
-bool NativeBridgeLinkNamespaces(struct native_bridge_namespace_t* from,
-                                struct native_bridge_namespace_t* to,
-                                const char* shared_libs_sonames) {
-  static auto f = GET_FUNC_PTR(NativeBridgeLinkNamespaces);
-  return f(from, to, shared_libs_sonames);
-}
-
-void* NativeBridgeLoadLibraryExt(const char* libpath, int flag,
-                                 struct native_bridge_namespace_t* ns) {
-  static auto f = GET_FUNC_PTR(NativeBridgeLoadLibraryExt);
-  return f(libpath, flag, ns);
-}
-
-struct native_bridge_namespace_t* NativeBridgeGetVendorNamespace() {
-  static auto f = GET_FUNC_PTR(NativeBridgeGetVendorNamespace);
-  return f();
-}
-
-#undef GET_FUNC_PTR
-
-}  // namespace android
diff --git a/libnativebridge/tests/Android.bp b/libnativebridge/tests/Android.bp
deleted file mode 100644
index 2bb8467..0000000
--- a/libnativebridge/tests/Android.bp
+++ /dev/null
@@ -1,110 +0,0 @@
-//
-// Copyright (C) 2017 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-cc_defaults {
-    name: "libnativebridge-dummy-defaults",
-
-    host_supported: true,
-    cflags: [
-        "-Wall",
-        "-Wextra",
-        "-Werror",
-    ],
-    header_libs: ["libnativebridge-headers"],
-    cppflags: ["-fvisibility=protected"],
-}
-
-cc_library_shared {
-    name: "libnativebridge-dummy",
-    srcs: ["DummyNativeBridge.cpp"],
-    defaults: ["libnativebridge-dummy-defaults"],
-}
-
-cc_library_shared {
-    name: "libnativebridge2-dummy",
-    srcs: ["DummyNativeBridge2.cpp"],
-    defaults: ["libnativebridge-dummy-defaults"],
-}
-
-cc_library_shared {
-    name: "libnativebridge3-dummy",
-    srcs: ["DummyNativeBridge3.cpp"],
-    defaults: ["libnativebridge-dummy-defaults"],
-}
-
-// Build the unit tests.
-cc_defaults {
-    name: "libnativebridge-tests-defaults",
-    test_per_src: true,
-
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-
-    srcs: [
-        "CodeCacheCreate_test.cpp",
-        "CodeCacheExists_test.cpp",
-        "CodeCacheStatFail_test.cpp",
-        "CompleteFlow_test.cpp",
-        "InvalidCharsNativeBridge_test.cpp",
-        "NativeBridge2Signal_test.cpp",
-        "NativeBridgeVersion_test.cpp",
-        "NeedsNativeBridge_test.cpp",
-        "PreInitializeNativeBridge_test.cpp",
-        "PreInitializeNativeBridgeFail1_test.cpp",
-        "PreInitializeNativeBridgeFail2_test.cpp",
-        "ReSetupNativeBridge_test.cpp",
-        "UnavailableNativeBridge_test.cpp",
-        "ValidNameNativeBridge_test.cpp",
-        "NativeBridge3UnloadLibrary_test.cpp",
-        "NativeBridge3GetError_test.cpp",
-        "NativeBridge3IsPathSupported_test.cpp",
-        "NativeBridge3InitAnonymousNamespace_test.cpp",
-        "NativeBridge3CreateNamespace_test.cpp",
-        "NativeBridge3LoadLibraryExt_test.cpp",
-    ],
-
-    shared_libs: [
-        "liblog",
-        "libnativebridge-dummy",
-    ],
-    header_libs: ["libbase_headers"],
-}
-
-cc_test {
-    name: "libnativebridge-tests",
-    defaults: ["libnativebridge-tests-defaults"],
-    host_supported: true,
-    shared_libs: ["libnativebridge"],
-}
-
-cc_test {
-    name: "libnativebridge-lazy-tests",
-    defaults: ["libnativebridge-tests-defaults"],
-    shared_libs: ["libnativebridge_lazy"],
-}
-
-// Build the test for the C API.
-cc_test {
-    name: "libnativebridge-api-tests",
-    host_supported: true,
-    test_per_src: true,
-    srcs: [
-        "NativeBridgeApi.c",
-    ],
-    header_libs: ["libnativebridge-headers"],
-}
diff --git a/libnativebridge/tests/CodeCacheCreate_test.cpp b/libnativebridge/tests/CodeCacheCreate_test.cpp
deleted file mode 100644
index 58270c4..0000000
--- a/libnativebridge/tests/CodeCacheCreate_test.cpp
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-#include <errno.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
-namespace android {
-
-// Tests that the bridge initialization creates the code_cache if it doesn't
-// exists.
-TEST_F(NativeBridgeTest, CodeCacheCreate) {
-    // Make sure that code_cache does not exists
-    struct stat st;
-    ASSERT_EQ(-1, stat(kCodeCache, &st));
-    ASSERT_EQ(ENOENT, errno);
-
-    // Init
-    ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary, nullptr));
-    ASSERT_TRUE(PreInitializeNativeBridge(".", "isa"));
-    ASSERT_TRUE(InitializeNativeBridge(nullptr, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_FALSE(NativeBridgeError());
-
-    // Check that code_cache was created
-    ASSERT_EQ(0, stat(kCodeCache, &st));
-    ASSERT_TRUE(S_ISDIR(st.st_mode));
-
-    // Clean up
-    UnloadNativeBridge();
-    ASSERT_EQ(0, rmdir(kCodeCache));
-
-    ASSERT_FALSE(NativeBridgeError());
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/CodeCacheExists_test.cpp b/libnativebridge/tests/CodeCacheExists_test.cpp
deleted file mode 100644
index 8ba0158..0000000
--- a/libnativebridge/tests/CodeCacheExists_test.cpp
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-#include <errno.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
-namespace android {
-
-// Tests that the bridge is initialized without errors if the code_cache already
-// exists.
-TEST_F(NativeBridgeTest, CodeCacheExists) {
-    // Make sure that code_cache does not exists
-    struct stat st;
-    ASSERT_EQ(-1, stat(kCodeCache, &st));
-    ASSERT_EQ(ENOENT, errno);
-
-    // Create the code_cache
-    ASSERT_EQ(0, mkdir(kCodeCache, S_IRWXU | S_IRWXG | S_IXOTH));
-
-    // Init
-    ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary, nullptr));
-    ASSERT_TRUE(PreInitializeNativeBridge(".", "isa"));
-    ASSERT_TRUE(InitializeNativeBridge(nullptr, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_FALSE(NativeBridgeError());
-
-    // Check that the code cache is still there
-    ASSERT_EQ(0, stat(kCodeCache, &st));
-    ASSERT_TRUE(S_ISDIR(st.st_mode));
-
-    // Clean up
-    UnloadNativeBridge();
-    ASSERT_EQ(0, rmdir(kCodeCache));
-
-    ASSERT_FALSE(NativeBridgeError());
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/CodeCacheStatFail_test.cpp b/libnativebridge/tests/CodeCacheStatFail_test.cpp
deleted file mode 100644
index 4ea519e..0000000
--- a/libnativebridge/tests/CodeCacheStatFail_test.cpp
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-#include <errno.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <fcntl.h>
-
-namespace android {
-
-// Tests that the bridge is initialized without errors if the code_cache is
-// existed as a file.
-TEST_F(NativeBridgeTest, CodeCacheStatFail) {
-    int fd = creat(kCodeCache, O_RDWR);
-    ASSERT_NE(-1, fd);
-    close(fd);
-
-    struct stat st;
-    ASSERT_EQ(-1, stat(kCodeCacheStatFail, &st));
-    ASSERT_EQ(ENOTDIR, errno);
-
-    // Init
-    ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary, nullptr));
-    ASSERT_TRUE(PreInitializeNativeBridge(kCodeCacheStatFail, "isa"));
-    ASSERT_TRUE(InitializeNativeBridge(nullptr, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_FALSE(NativeBridgeError());
-
-    // Clean up
-    UnloadNativeBridge();
-
-    ASSERT_FALSE(NativeBridgeError());
-    unlink(kCodeCache);
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/CompleteFlow_test.cpp b/libnativebridge/tests/CompleteFlow_test.cpp
deleted file mode 100644
index b033792..0000000
--- a/libnativebridge/tests/CompleteFlow_test.cpp
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-#include <unistd.h>
-
-namespace android {
-
-TEST_F(NativeBridgeTest, CompleteFlow) {
-    // Init
-    ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_TRUE(PreInitializeNativeBridge(".", "isa"));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_TRUE(InitializeNativeBridge(nullptr, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-
-    // Basic calls to check that nothing crashes
-    ASSERT_FALSE(NativeBridgeIsSupported(nullptr));
-    ASSERT_EQ(nullptr, NativeBridgeLoadLibrary(nullptr, 0));
-    ASSERT_EQ(nullptr, NativeBridgeGetTrampoline(nullptr, nullptr, nullptr, 0));
-
-    // Unload
-    UnloadNativeBridge();
-
-    ASSERT_FALSE(NativeBridgeAvailable());
-    ASSERT_FALSE(NativeBridgeError());
-
-    // Clean-up code_cache
-    ASSERT_EQ(0, rmdir(kCodeCache));
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/DummyNativeBridge.cpp b/libnativebridge/tests/DummyNativeBridge.cpp
deleted file mode 100644
index b9894f6..0000000
--- a/libnativebridge/tests/DummyNativeBridge.cpp
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-// A dummy implementation of the native-bridge interface.
-
-#include "nativebridge/native_bridge.h"
-
-// NativeBridgeCallbacks implementations
-extern "C" bool native_bridge_initialize(const android::NativeBridgeRuntimeCallbacks* /* art_cbs */,
-                                         const char* /* app_code_cache_dir */,
-                                         const char* /* isa */) {
-  return true;
-}
-
-extern "C" void* native_bridge_loadLibrary(const char* /* libpath */, int /* flag */) {
-  return nullptr;
-}
-
-extern "C" void* native_bridge_getTrampoline(void* /* handle */, const char* /* name */,
-                                             const char* /* shorty */, uint32_t /* len */) {
-  return nullptr;
-}
-
-extern "C" bool native_bridge_isSupported(const char* /* libpath */) {
-  return false;
-}
-
-extern "C" const struct android::NativeBridgeRuntimeValues* native_bridge_getAppEnv(
-    const char* /* abi */) {
-  return nullptr;
-}
-
-android::NativeBridgeCallbacks NativeBridgeItf {
-  .version = 1,
-  .initialize = &native_bridge_initialize,
-  .loadLibrary = &native_bridge_loadLibrary,
-  .getTrampoline = &native_bridge_getTrampoline,
-  .isSupported = &native_bridge_isSupported,
-  .getAppEnv = &native_bridge_getAppEnv
-};
diff --git a/libnativebridge/tests/DummyNativeBridge2.cpp b/libnativebridge/tests/DummyNativeBridge2.cpp
deleted file mode 100644
index 6920c74..0000000
--- a/libnativebridge/tests/DummyNativeBridge2.cpp
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-// A dummy implementation of the native-bridge interface.
-
-#include "nativebridge/native_bridge.h"
-
-#include <signal.h>
-
-// NativeBridgeCallbacks implementations
-extern "C" bool native_bridge2_initialize(const android::NativeBridgeRuntimeCallbacks* /* art_cbs */,
-                                         const char* /* app_code_cache_dir */,
-                                         const char* /* isa */) {
-  return true;
-}
-
-extern "C" void* native_bridge2_loadLibrary(const char* /* libpath */, int /* flag */) {
-  return nullptr;
-}
-
-extern "C" void* native_bridge2_getTrampoline(void* /* handle */, const char* /* name */,
-                                             const char* /* shorty */, uint32_t /* len */) {
-  return nullptr;
-}
-
-extern "C" bool native_bridge2_isSupported(const char* /* libpath */) {
-  return false;
-}
-
-extern "C" const struct android::NativeBridgeRuntimeValues* native_bridge2_getAppEnv(
-    const char* /* abi */) {
-  return nullptr;
-}
-
-extern "C" bool native_bridge2_is_compatible_compatible_with(uint32_t version) {
-  // For testing, allow 1 and 2, but disallow 3+.
-  return version <= 2;
-}
-
-static bool native_bridge2_dummy_signal_handler(int, siginfo_t*, void*) {
-  // TODO: Implement something here. We'd either have to have a death test with a log here, or
-  //       we'd have to be able to resume after the faulting instruction...
-  return true;
-}
-
-extern "C" android::NativeBridgeSignalHandlerFn native_bridge2_get_signal_handler(int signal) {
-  if (signal == SIGSEGV) {
-    return &native_bridge2_dummy_signal_handler;
-  }
-  return nullptr;
-}
-
-android::NativeBridgeCallbacks NativeBridgeItf {
-  .version = 2,
-  .initialize = &native_bridge2_initialize,
-  .loadLibrary = &native_bridge2_loadLibrary,
-  .getTrampoline = &native_bridge2_getTrampoline,
-  .isSupported = &native_bridge2_isSupported,
-  .getAppEnv = &native_bridge2_getAppEnv,
-  .isCompatibleWith = &native_bridge2_is_compatible_compatible_with,
-  .getSignalHandler = &native_bridge2_get_signal_handler
-};
-
diff --git a/libnativebridge/tests/DummyNativeBridge3.cpp b/libnativebridge/tests/DummyNativeBridge3.cpp
deleted file mode 100644
index 4ef1c82..0000000
--- a/libnativebridge/tests/DummyNativeBridge3.cpp
+++ /dev/null
@@ -1,124 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-// A dummy implementation of the native-bridge interface.
-
-#include "nativebridge/native_bridge.h"
-
-#include <signal.h>
-
-// NativeBridgeCallbacks implementations
-extern "C" bool native_bridge3_initialize(
-                      const android::NativeBridgeRuntimeCallbacks* /* art_cbs */,
-                      const char* /* app_code_cache_dir */,
-                      const char* /* isa */) {
-  return true;
-}
-
-extern "C" void* native_bridge3_loadLibrary(const char* /* libpath */, int /* flag */) {
-  return nullptr;
-}
-
-extern "C" void* native_bridge3_getTrampoline(void* /* handle */, const char* /* name */,
-                                             const char* /* shorty */, uint32_t /* len */) {
-  return nullptr;
-}
-
-extern "C" bool native_bridge3_isSupported(const char* /* libpath */) {
-  return false;
-}
-
-extern "C" const struct android::NativeBridgeRuntimeValues* native_bridge3_getAppEnv(
-    const char* /* abi */) {
-  return nullptr;
-}
-
-extern "C" bool native_bridge3_isCompatibleWith(uint32_t version) {
-  // For testing, allow 1-3, but disallow 4+.
-  return version <= 3;
-}
-
-static bool native_bridge3_dummy_signal_handler(int, siginfo_t*, void*) {
-  // TODO: Implement something here. We'd either have to have a death test with a log here, or
-  //       we'd have to be able to resume after the faulting instruction...
-  return true;
-}
-
-extern "C" android::NativeBridgeSignalHandlerFn native_bridge3_getSignalHandler(int signal) {
-  if (signal == SIGSEGV) {
-    return &native_bridge3_dummy_signal_handler;
-  }
-  return nullptr;
-}
-
-extern "C" int native_bridge3_unloadLibrary(void* /* handle */) {
-  return 0;
-}
-
-extern "C" const char* native_bridge3_getError() {
-  return nullptr;
-}
-
-extern "C" bool native_bridge3_isPathSupported(const char* /* path */) {
-  return true;
-}
-
-extern "C" bool native_bridge3_initAnonymousNamespace(const char* /* public_ns_sonames */,
-                                                      const char* /* anon_ns_library_path */) {
-  return true;
-}
-
-extern "C" android::native_bridge_namespace_t*
-native_bridge3_createNamespace(const char* /* name */,
-                               const char* /* ld_library_path */,
-                               const char* /* default_library_path */,
-                               uint64_t /* type */,
-                               const char* /* permitted_when_isolated_path */,
-                               android::native_bridge_namespace_t* /* parent_ns */) {
-  return nullptr;
-}
-
-extern "C" bool native_bridge3_linkNamespaces(android::native_bridge_namespace_t* /* from */,
-                                              android::native_bridge_namespace_t* /* to */,
-                                              const char* /* shared_libs_soname */) {
-  return true;
-}
-
-extern "C" void* native_bridge3_loadLibraryExt(const char* /* libpath */,
-                                               int /* flag */,
-                                               android::native_bridge_namespace_t* /* ns */) {
-  return nullptr;
-}
-
-android::NativeBridgeCallbacks NativeBridgeItf{
-    // v1
-    .version = 3,
-    .initialize = &native_bridge3_initialize,
-    .loadLibrary = &native_bridge3_loadLibrary,
-    .getTrampoline = &native_bridge3_getTrampoline,
-    .isSupported = &native_bridge3_isSupported,
-    .getAppEnv = &native_bridge3_getAppEnv,
-    // v2
-    .isCompatibleWith = &native_bridge3_isCompatibleWith,
-    .getSignalHandler = &native_bridge3_getSignalHandler,
-    // v3
-    .unloadLibrary = &native_bridge3_unloadLibrary,
-    .getError = &native_bridge3_getError,
-    .isPathSupported = &native_bridge3_isPathSupported,
-    .initAnonymousNamespace = &native_bridge3_initAnonymousNamespace,
-    .createNamespace = &native_bridge3_createNamespace,
-    .linkNamespaces = &native_bridge3_linkNamespaces,
-    .loadLibraryExt = &native_bridge3_loadLibraryExt};
diff --git a/libnativebridge/tests/InvalidCharsNativeBridge_test.cpp b/libnativebridge/tests/InvalidCharsNativeBridge_test.cpp
deleted file mode 100644
index 8f7973d..0000000
--- a/libnativebridge/tests/InvalidCharsNativeBridge_test.cpp
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-namespace android {
-
-static const char* kTestName = "../librandom$@-bridge_not.existing.so";
-
-TEST_F(NativeBridgeTest, InvalidChars) {
-    // Do one test actually calling setup.
-    EXPECT_EQ(false, NativeBridgeError());
-    LoadNativeBridge(kTestName, nullptr);
-    // This should lead to an error for invalid characters.
-    EXPECT_EQ(true, NativeBridgeError());
-
-    // Further tests need to use NativeBridgeNameAcceptable, as the error
-    // state can't be changed back.
-    EXPECT_EQ(false, NativeBridgeNameAcceptable("."));
-    EXPECT_EQ(false, NativeBridgeNameAcceptable(".."));
-    EXPECT_EQ(false, NativeBridgeNameAcceptable("_"));
-    EXPECT_EQ(false, NativeBridgeNameAcceptable("-"));
-    EXPECT_EQ(false, NativeBridgeNameAcceptable("lib@.so"));
-    EXPECT_EQ(false, NativeBridgeNameAcceptable("lib$.so"));
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/NativeBridge2Signal_test.cpp b/libnativebridge/tests/NativeBridge2Signal_test.cpp
deleted file mode 100644
index 44e45e3..0000000
--- a/libnativebridge/tests/NativeBridge2Signal_test.cpp
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-#include <signal.h>
-#include <unistd.h>
-
-namespace android {
-
-constexpr const char* kNativeBridgeLibrary2 = "libnativebridge2-dummy.so";
-
-TEST_F(NativeBridgeTest, V2_Signal) {
-    // Init
-    ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary2, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_TRUE(PreInitializeNativeBridge(".", "isa"));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_TRUE(InitializeNativeBridge(nullptr, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-
-    ASSERT_EQ(2U, NativeBridgeGetVersion());
-    ASSERT_NE(nullptr, NativeBridgeGetSignalHandler(SIGSEGV));
-
-    // Clean-up code_cache
-    ASSERT_EQ(0, rmdir(kCodeCache));
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/NativeBridge3CreateNamespace_test.cpp b/libnativebridge/tests/NativeBridge3CreateNamespace_test.cpp
deleted file mode 100644
index 668d942..0000000
--- a/libnativebridge/tests/NativeBridge3CreateNamespace_test.cpp
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-namespace android {
-
-constexpr const char* kNativeBridgeLibrary3 = "libnativebridge3-dummy.so";
-
-TEST_F(NativeBridgeTest, V3_CreateNamespace) {
-    // Init
-    ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary3, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_TRUE(PreInitializeNativeBridge(".", "isa"));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_TRUE(InitializeNativeBridge(nullptr, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-
-    ASSERT_EQ(3U, NativeBridgeGetVersion());
-    ASSERT_EQ(nullptr, NativeBridgeCreateNamespace(nullptr, nullptr, nullptr,
-                                                   0, nullptr, nullptr));
-
-    // Clean-up code_cache
-    ASSERT_EQ(0, rmdir(kCodeCache));
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/NativeBridge3GetError_test.cpp b/libnativebridge/tests/NativeBridge3GetError_test.cpp
deleted file mode 100644
index 0b9f582..0000000
--- a/libnativebridge/tests/NativeBridge3GetError_test.cpp
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-namespace android {
-
-constexpr const char* kNativeBridgeLibrary3 = "libnativebridge3-dummy.so";
-
-TEST_F(NativeBridgeTest, V3_GetError) {
-    // Init
-    ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary3, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_TRUE(PreInitializeNativeBridge(".", "isa"));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_TRUE(InitializeNativeBridge(nullptr, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-
-    ASSERT_EQ(3U, NativeBridgeGetVersion());
-    ASSERT_EQ(nullptr, NativeBridgeGetError());
-
-    // Clean-up code_cache
-    ASSERT_EQ(0, rmdir(kCodeCache));
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/NativeBridge3InitAnonymousNamespace_test.cpp b/libnativebridge/tests/NativeBridge3InitAnonymousNamespace_test.cpp
deleted file mode 100644
index b0d6b09..0000000
--- a/libnativebridge/tests/NativeBridge3InitAnonymousNamespace_test.cpp
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-namespace android {
-
-constexpr const char* kNativeBridgeLibrary3 = "libnativebridge3-dummy.so";
-
-TEST_F(NativeBridgeTest, V3_InitAnonymousNamespace) {
-  // Init
-  ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary3, nullptr));
-  ASSERT_TRUE(NativeBridgeAvailable());
-  ASSERT_TRUE(PreInitializeNativeBridge(".", "isa"));
-  ASSERT_TRUE(NativeBridgeAvailable());
-  ASSERT_TRUE(InitializeNativeBridge(nullptr, nullptr));
-  ASSERT_TRUE(NativeBridgeAvailable());
-
-  ASSERT_EQ(3U, NativeBridgeGetVersion());
-  ASSERT_EQ(true, NativeBridgeInitAnonymousNamespace(nullptr, nullptr));
-
-  // Clean-up code_cache
-  ASSERT_EQ(0, rmdir(kCodeCache));
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/NativeBridge3IsPathSupported_test.cpp b/libnativebridge/tests/NativeBridge3IsPathSupported_test.cpp
deleted file mode 100644
index 325e40b..0000000
--- a/libnativebridge/tests/NativeBridge3IsPathSupported_test.cpp
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-namespace android {
-
-constexpr const char* kNativeBridgeLibrary3 = "libnativebridge3-dummy.so";
-
-TEST_F(NativeBridgeTest, V3_IsPathSupported) {
-    // Init
-    ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary3, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_TRUE(PreInitializeNativeBridge(".", "isa"));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_TRUE(InitializeNativeBridge(nullptr, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-
-    ASSERT_EQ(3U, NativeBridgeGetVersion());
-    ASSERT_EQ(true, NativeBridgeIsPathSupported(nullptr));
-
-    // Clean-up code_cache
-    ASSERT_EQ(0, rmdir(kCodeCache));
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/NativeBridge3LoadLibraryExt_test.cpp b/libnativebridge/tests/NativeBridge3LoadLibraryExt_test.cpp
deleted file mode 100644
index 4caeb44..0000000
--- a/libnativebridge/tests/NativeBridge3LoadLibraryExt_test.cpp
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-namespace android {
-
-constexpr const char* kNativeBridgeLibrary3 = "libnativebridge3-dummy.so";
-
-TEST_F(NativeBridgeTest, V3_LoadLibraryExt) {
-    // Init
-    ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary3, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_TRUE(PreInitializeNativeBridge(".", "isa"));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_TRUE(InitializeNativeBridge(nullptr, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-
-    ASSERT_EQ(3U, NativeBridgeGetVersion());
-    ASSERT_EQ(nullptr, NativeBridgeLoadLibraryExt(nullptr, 0, nullptr));
-
-    // Clean-up code_cache
-    ASSERT_EQ(0, rmdir(kCodeCache));
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/NativeBridge3UnloadLibrary_test.cpp b/libnativebridge/tests/NativeBridge3UnloadLibrary_test.cpp
deleted file mode 100644
index 93a979c..0000000
--- a/libnativebridge/tests/NativeBridge3UnloadLibrary_test.cpp
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-namespace android {
-
-constexpr const char* kNativeBridgeLibrary3 = "libnativebridge3-dummy.so";
-
-TEST_F(NativeBridgeTest, V3_UnloadLibrary) {
-    // Init
-    ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary3, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_TRUE(PreInitializeNativeBridge(".", "isa"));
-    ASSERT_TRUE(NativeBridgeAvailable());
-    ASSERT_TRUE(InitializeNativeBridge(nullptr, nullptr));
-    ASSERT_TRUE(NativeBridgeAvailable());
-
-    ASSERT_EQ(3U, NativeBridgeGetVersion());
-    ASSERT_EQ(0, NativeBridgeUnloadLibrary(nullptr));
-
-    // Clean-up code_cache
-    ASSERT_EQ(0, rmdir(kCodeCache));
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/NativeBridgeApi.c b/libnativebridge/tests/NativeBridgeApi.c
deleted file mode 100644
index 7ab71fe..0000000
--- a/libnativebridge/tests/NativeBridgeApi.c
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/* The main purpose of this test is to ensure this C header compiles in C, so
- * that no C++ features inadvertently leak into the C ABI. */
-#include "nativebridge/native_bridge.h"
-
-int main(int argc, char** argv) {
-  (void)argc;
-  (void)argv;
-  return 0;
-}
diff --git a/libnativebridge/tests/NativeBridgeTest.h b/libnativebridge/tests/NativeBridgeTest.h
deleted file mode 100644
index 0f99816..0000000
--- a/libnativebridge/tests/NativeBridgeTest.h
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef NATIVE_BRIDGE_TEST_H_
-#define NATIVE_BRIDGE_TEST_H_
-
-#define LOG_TAG "NativeBridge_test"
-
-#include <nativebridge/native_bridge.h>
-#include <gtest/gtest.h>
-
-constexpr const char* kNativeBridgeLibrary = "libnativebridge-dummy.so";
-constexpr const char* kCodeCache = "./code_cache";
-constexpr const char* kCodeCacheStatFail = "./code_cache/temp";
-constexpr const char* kNativeBridgeLibrary2 = "libnativebridge2-dummy.so";
-constexpr const char* kNativeBridgeLibrary3 = "libnativebridge3-dummy.so";
-
-namespace android {
-
-class NativeBridgeTest : public testing::Test {
-};
-
-};  // namespace android
-
-#endif  // NATIVE_BRIDGE_H_
-
diff --git a/libnativebridge/tests/NativeBridgeVersion_test.cpp b/libnativebridge/tests/NativeBridgeVersion_test.cpp
deleted file mode 100644
index d3f9a80..0000000
--- a/libnativebridge/tests/NativeBridgeVersion_test.cpp
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-#include <unistd.h>
-
-namespace android {
-
-TEST_F(NativeBridgeTest, Version) {
-    // When a bridge isn't loaded, we expect 0.
-    EXPECT_EQ(NativeBridgeGetVersion(), 0U);
-
-    // After our dummy bridge has been loaded, we expect 1.
-    ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary, nullptr));
-    EXPECT_EQ(NativeBridgeGetVersion(), 1U);
-
-    // Unload
-    UnloadNativeBridge();
-
-    // Version information is gone.
-    EXPECT_EQ(NativeBridgeGetVersion(), 0U);
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/NeedsNativeBridge_test.cpp b/libnativebridge/tests/NeedsNativeBridge_test.cpp
deleted file mode 100644
index c8ff743..0000000
--- a/libnativebridge/tests/NeedsNativeBridge_test.cpp
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-#include <android-base/macros.h>
-
-namespace android {
-
-static const char* kISAs[] = { "arm", "arm64", "mips", "mips64", "x86", "x86_64", "random", "64arm",
-                               "64_x86", "64_x86_64", "", "reallylongstringabcd", nullptr };
-
-TEST_F(NativeBridgeTest, NeedsNativeBridge) {
-  EXPECT_EQ(false, NeedsNativeBridge(ABI_STRING));
-
-  const size_t kISACount = sizeof(kISAs) / sizeof(kISAs[0]);
-  for (size_t i = 0; i < kISACount; i++) {
-    EXPECT_EQ(kISAs[i] == nullptr ? false : strcmp(kISAs[i], ABI_STRING) != 0,
-              NeedsNativeBridge(kISAs[i]));
-    }
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/PreInitializeNativeBridgeFail1_test.cpp b/libnativebridge/tests/PreInitializeNativeBridgeFail1_test.cpp
deleted file mode 100644
index 5a2b0a1..0000000
--- a/libnativebridge/tests/PreInitializeNativeBridgeFail1_test.cpp
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-#include <dlfcn.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <sys/mount.h>
-#include <sys/stat.h>
-
-#include <cstdio>
-#include <cstring>
-
-#include <android/log.h>
-
-namespace android {
-
-TEST_F(NativeBridgeTest, PreInitializeNativeBridgeFail1) {
-  // Needs a valid application directory.
-  ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary, nullptr));
-  ASSERT_FALSE(PreInitializeNativeBridge(nullptr, "isa"));
-  ASSERT_TRUE(NativeBridgeError());
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/PreInitializeNativeBridgeFail2_test.cpp b/libnativebridge/tests/PreInitializeNativeBridgeFail2_test.cpp
deleted file mode 100644
index af976b1..0000000
--- a/libnativebridge/tests/PreInitializeNativeBridgeFail2_test.cpp
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <dlfcn.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <sys/mount.h>
-#include <sys/stat.h>
-
-#include <cstdio>
-#include <cstring>
-
-#include <android/log.h>
-
-#include "NativeBridgeTest.h"
-
-namespace android {
-
-TEST_F(NativeBridgeTest, PreInitializeNativeBridgeFail2) {
-  // Needs LoadNativeBridge() first
-  ASSERT_FALSE(PreInitializeNativeBridge(nullptr, "isa"));
-  ASSERT_TRUE(NativeBridgeError());
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/PreInitializeNativeBridge_test.cpp b/libnativebridge/tests/PreInitializeNativeBridge_test.cpp
deleted file mode 100644
index cd5a8e2..0000000
--- a/libnativebridge/tests/PreInitializeNativeBridge_test.cpp
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <dlfcn.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <sys/mount.h>
-#include <sys/stat.h>
-
-#include <cstdio>
-#include <cstring>
-
-#include <android/log.h>
-
-#include "NativeBridgeTest.h"
-
-namespace android {
-
-TEST_F(NativeBridgeTest, PreInitializeNativeBridge) {
-    ASSERT_TRUE(LoadNativeBridge(kNativeBridgeLibrary, nullptr));
-#if !defined(__APPLE__)         // Mac OS does not support bind-mount.
-#if !defined(__ANDROID__)       // Cannot write into the hard-wired location.
-    static constexpr const char* kTestData = "PreInitializeNativeBridge test.";
-
-    // Try to create our mount namespace.
-    if (unshare(CLONE_NEWNS) != -1) {
-        // Create a dummy file.
-        FILE* cpuinfo = fopen("./cpuinfo", "w");
-        ASSERT_NE(nullptr, cpuinfo) << strerror(errno);
-        fprintf(cpuinfo, kTestData);
-        fclose(cpuinfo);
-
-        ASSERT_TRUE(PreInitializeNativeBridge("does not matter 1", "short 2"));
-
-        // Read /proc/cpuinfo
-        FILE* proc_cpuinfo = fopen("/proc/cpuinfo", "r");
-        ASSERT_NE(nullptr, proc_cpuinfo) << strerror(errno);
-        char buf[1024];
-        EXPECT_NE(nullptr, fgets(buf, sizeof(buf), proc_cpuinfo)) << "Error reading.";
-        fclose(proc_cpuinfo);
-
-        EXPECT_EQ(0, strcmp(buf, kTestData));
-
-        // Delete the file.
-        ASSERT_EQ(0, unlink("./cpuinfo")) << "Error unlinking temporary file.";
-        // Ending the test will tear down the mount namespace.
-    } else {
-        GTEST_LOG_(WARNING) << "Could not create mount namespace. Are you running this as root?";
-    }
-#endif
-#endif
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/ReSetupNativeBridge_test.cpp b/libnativebridge/tests/ReSetupNativeBridge_test.cpp
deleted file mode 100644
index 944e5d7..0000000
--- a/libnativebridge/tests/ReSetupNativeBridge_test.cpp
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-namespace android {
-
-TEST_F(NativeBridgeTest, ReSetup) {
-    EXPECT_EQ(false, NativeBridgeError());
-    LoadNativeBridge("", nullptr);
-    EXPECT_EQ(false, NativeBridgeError());
-    LoadNativeBridge("", nullptr);
-    // This should lead to an error for trying to re-setup a native bridge.
-    EXPECT_EQ(true, NativeBridgeError());
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/UnavailableNativeBridge_test.cpp b/libnativebridge/tests/UnavailableNativeBridge_test.cpp
deleted file mode 100644
index ad374a5..0000000
--- a/libnativebridge/tests/UnavailableNativeBridge_test.cpp
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "NativeBridgeTest.h"
-
-namespace android {
-
-TEST_F(NativeBridgeTest, NoNativeBridge) {
-    EXPECT_EQ(false, NativeBridgeAvailable());
-    // Try to initialize. This should fail as we are not set up.
-    EXPECT_EQ(false, InitializeNativeBridge(nullptr, nullptr));
-    EXPECT_EQ(true, NativeBridgeError());
-    EXPECT_EQ(false, NativeBridgeAvailable());
-}
-
-}  // namespace android
diff --git a/libnativebridge/tests/ValidNameNativeBridge_test.cpp b/libnativebridge/tests/ValidNameNativeBridge_test.cpp
deleted file mode 100644
index 690be4a..0000000
--- a/libnativebridge/tests/ValidNameNativeBridge_test.cpp
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <NativeBridgeTest.h>
-
-namespace android {
-
-static const char* kTestName = "librandom-bridge_not.existing.so";
-
-TEST_F(NativeBridgeTest, ValidName) {
-    // Check that the name is acceptable.
-    EXPECT_EQ(true, NativeBridgeNameAcceptable(kTestName));
-
-    // Now check what happens on LoadNativeBridge.
-    EXPECT_EQ(false, NativeBridgeError());
-    LoadNativeBridge(kTestName, nullptr);
-    // This will lead to an error as the library doesn't exist.
-    EXPECT_EQ(true, NativeBridgeError());
-    EXPECT_EQ(false, NativeBridgeAvailable());
-}
-
-}  // namespace android
diff --git a/libnativeloader/.clang-format b/libnativeloader/.clang-format
deleted file mode 120000
index fd0645f..0000000
--- a/libnativeloader/.clang-format
+++ /dev/null
@@ -1 +0,0 @@
-../.clang-format-2
\ No newline at end of file
diff --git a/libnativeloader/Android.bp b/libnativeloader/Android.bp
deleted file mode 100644
index b860db9..0000000
--- a/libnativeloader/Android.bp
+++ /dev/null
@@ -1,96 +0,0 @@
-// Shared library for target
-// ========================================================
-cc_defaults {
-    name: "libnativeloader-defaults",
-    cflags: [
-        "-Werror",
-        "-Wall",
-    ],
-    cppflags: [
-        "-fvisibility=hidden",
-    ],
-    header_libs: ["libnativeloader-headers"],
-    export_header_lib_headers: ["libnativeloader-headers"],
-}
-
-cc_library {
-    name: "libnativeloader",
-    defaults: ["libnativeloader-defaults"],
-    host_supported: true,
-    srcs: [
-        "native_loader.cpp",
-    ],
-    shared_libs: [
-        "libnativehelper",
-        "liblog",
-        "libnativebridge",
-        "libbase",
-    ],
-    target: {
-        android: {
-            srcs: [
-                "library_namespaces.cpp",
-                "native_loader_namespace.cpp",
-                "public_libraries.cpp",
-            ],
-            shared_libs: [
-                "libdl_android",
-            ],
-        },
-    },
-    required: [
-        "llndk.libraries.txt",
-        "vndksp.libraries.txt",
-    ],
-    stubs: {
-        symbol_file: "libnativeloader.map.txt",
-        versions: ["1"],
-    },
-}
-
-// TODO(b/124250621) eliminate the need for this library
-cc_library {
-    name: "libnativeloader_lazy",
-    defaults: ["libnativeloader-defaults"],
-    host_supported: false,
-    srcs: ["native_loader_lazy.cpp"],
-    required: ["libnativeloader"],
-}
-
-cc_library_headers {
-    name: "libnativeloader-headers",
-    host_supported: true,
-    export_include_dirs: ["include"],
-}
-
-// TODO(jiyong) Remove this when its use in the internal master is
-// switched to libnativeloader-headers
-cc_library_headers {
-    name: "libnativeloader-dummy-headers",
-    host_supported: true,
-    export_include_dirs: ["include"],
-}
-
-cc_test {
-    name: "libnativeloader_test",
-    srcs: [
-        "native_loader_test.cpp",
-        "native_loader.cpp",
-        "library_namespaces.cpp",
-        "native_loader_namespace.cpp",
-        "public_libraries.cpp",
-    ],
-    cflags: ["-DANDROID"],
-    static_libs: [
-        "libbase",
-        "liblog",
-        "libnativehelper",
-        "libgmock",
-    ],
-    header_libs: [
-        "libnativebridge-headers",
-        "libnativeloader-headers",
-    ],
-    system_shared_libs: ["libc", "libm"],
-    test_suites: ["device-tests"],
-}
diff --git a/libnativeloader/OWNERS b/libnativeloader/OWNERS
deleted file mode 100644
index f735653..0000000
--- a/libnativeloader/OWNERS
+++ /dev/null
@@ -1,6 +0,0 @@
-dimitry@google.com
-jiyong@google.com
-ngeoffray@google.com
-oth@google.com
-mast@google.com
-rpl@google.com
diff --git a/libnativeloader/README.md b/libnativeloader/README.md
deleted file mode 100644
index 46f6fdd..0000000
--- a/libnativeloader/README.md
+++ /dev/null
@@ -1,84 +0,0 @@
-libnativeloader
-===============================================================================
-
-Overview
--------------------------------------------------------------------------------
-libnativeloader is responsible for loading native shared libraries (`*.so`
-files) inside the Android Runtime (ART). The native shared libraries could be
-app-provided JNI libraries or public native libraries like `libc.so` provided
-by the platform.
-
-The most typical use case of this library is calling `System.loadLibrary(name)`.
-When the method is called, the ART runtime delegates the call to this library
-along with the reference to the classloader where the call was made.  Then this
-library finds the linker namespace (named `classloader-namespace`) that is
-associated with the given classloader, and tries to load the requested library
-from the namespace. The actual searching, loading, and linking of the library
-is performed by the dynamic linker.
-
-The linker namespace is created when an APK is loaded into the process, and is
-associated with the classloader that loaded the APK. The linker namespace is
-configured so that only the JNI libraries embedded in the APK is accessible
-from the namespace, thus preventing an APK from loading JNI libraries of other
-APKs.
-
-The linker namespace is also configured differently depending on other
-characteristics of the APK such as whether or not the APK is bundled with the
-platform. In case of the unbundled, i.e., downloaded or updated APK, only the
-public native libraries that is listed in `/system/etc/public.libraries.txt`
-are available from the platform, whereas in case of the bundled, all libraries
-under `/system/lib` are available (i.e. shared). In case when the unbundled
-app is from `/vendor` or `/product` partition, the app is additionally provided
-with the [VNDK-SP](https://source.android.com/devices/architecture/vndk#sp-hal)
-libraries. As the platform is getting modularized with
-[APEX](https://android.googlesource.com/platform/system/apex/+/refs/heads/master/docs/README.md),
-some libraries are no longer provided from platform, but from the APEXes which
-have their own linker namespaces. For example, ICU libraries `libicuuc.so` and
-`libicui18n.so` are from the runtime APEX.
-
-The list of public native libraries is not static. The default set of libraries
-are defined in AOSP, but partners can extend it to include their own libraries.
-Currently, following extensions are available:
-
-- `/vendor/etc/public.libraries.txt`: libraries in `/vendor/lib` that are
-specific to the underlying SoC, e.g. GPU, DSP, etc.
-- `/{system|product}/etc/public.libraries-<companyname>.txt`: libraries in
-`/{system|system}/lib` that a device manufacturer has newly added. The
-libraries should be named as `lib<name>.<companyname>.so` as in
-`libFoo.acme.so`.
-
-Note that, due to the naming constraint requiring `.<companyname>.so` suffix, it
-is prohibited for a device manufacturer to expose an AOSP-defined private
-library, e.g. libgui.so, libart.so, etc., to APKs.
-
-Lastly, libnativeloader is responsible for abstracting the two types of the
-dynamic linker interface: `libdl.so` and `libnativebridge.so`. The former is
-for non-translated, e.g. ARM-on-ARM, libraries, while the latter is for
-loading libraries in a translated environment such as ARM-on-x86.
-
-Implementation
--------------------------------------------------------------------------------
-Implementation wise, libnativeloader consists of four parts:
-
-- `native_loader.cpp`
-- `library_namespaces.cpp`
-- `native_loader_namespace.cpp`
-- `public_libraries.cpp`
-
-`native_loader.cpp` implements the public interface of this library. It is just
-a thin wrapper around `library_namespaces.cpp` and `native_loader_namespace.cpp`.
-
-`library_namespaces.cpp` implements the singleton class `LibraryNamespaces` which
-is a manager-like entity that is responsible for creating and configuring
-linker namespaces and finding an already created linker namespace for a given
-classloader.
-
-`native_loader_namesapces.cpp` implements the class `NativeLoaderNamespace` that
-models a linker namespace. It's main job is to abstract the two types of the
-dynamic linker interface so that other parts of this library do not have to know
-the differences of the interfaces.
-
-`public_libraries.cpp` is responsible for reading `*.txt` files for the public
-native libraries from the various partitions. It can be considered as a part of
-`LibraryNamespaces` but is separated from it to hide the details of the parsing
-routines.
diff --git a/libnativeloader/TEST_MAPPING b/libnativeloader/TEST_MAPPING
deleted file mode 100644
index 7becb77..0000000
--- a/libnativeloader/TEST_MAPPING
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  "presubmit": [
-    {
-      "name": "libnativeloader_test"
-    }
-  ],
-  "imports": [
-    {
-      "path": "cts/tests/tests/jni"
-    }
-  ]
-}
diff --git a/libnativeloader/include/nativeloader/dlext_namespaces.h b/libnativeloader/include/nativeloader/dlext_namespaces.h
deleted file mode 100644
index 2d6ce85..0000000
--- a/libnativeloader/include/nativeloader/dlext_namespaces.h
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef __ANDROID_DLEXT_NAMESPACES_H__
-#define __ANDROID_DLEXT_NAMESPACES_H__
-
-#include <android/dlext.h>
-#include <stdbool.h>
-
-__BEGIN_DECLS
-
-/*
- * Initializes anonymous namespaces. The shared_libs_sonames is the list of sonames
- * to be shared by default namespace separated by colon. Example: "libc.so:libm.so:libdl.so".
- *
- * The library_search_path is the search path for anonymous namespace. The anonymous namespace
- * is used in the case when linker cannot identify the caller of dlopen/dlsym. This happens
- * for the code not loaded by dynamic linker; for example calls from the mono-compiled code.
- */
-extern bool android_init_anonymous_namespace(const char* shared_libs_sonames,
-                                             const char* library_search_path);
-
-
-enum {
-  /* A regular namespace is the namespace with a custom search path that does
-   * not impose any restrictions on the location of native libraries.
-   */
-  ANDROID_NAMESPACE_TYPE_REGULAR = 0,
-
-  /* An isolated namespace requires all the libraries to be on the search path
-   * or under permitted_when_isolated_path. The search path is the union of
-   * ld_library_path and default_library_path.
-   */
-  ANDROID_NAMESPACE_TYPE_ISOLATED = 1,
-
-  /* The shared namespace clones the list of libraries of the caller namespace upon creation
-   * which means that they are shared between namespaces - the caller namespace and the new one
-   * will use the same copy of a library if it was loaded prior to android_create_namespace call.
-   *
-   * Note that libraries loaded after the namespace is created will not be shared.
-   *
-   * Shared namespaces can be isolated or regular. Note that they do not inherit the search path nor
-   * permitted_path from the caller's namespace.
-   */
-  ANDROID_NAMESPACE_TYPE_SHARED = 2,
-
-  /* This flag instructs linker to enable grey-list workaround for the namespace.
-   * See http://b/26394120 for details.
-   */
-  ANDROID_NAMESPACE_TYPE_GREYLIST_ENABLED = 0x08000000,
-
-  ANDROID_NAMESPACE_TYPE_SHARED_ISOLATED = ANDROID_NAMESPACE_TYPE_SHARED |
-                                           ANDROID_NAMESPACE_TYPE_ISOLATED,
-};
-
-/*
- * Creates new linker namespace.
- * ld_library_path and default_library_path represent the search path
- * for the libraries in the namespace.
- *
- * The libraries in the namespace are searched by folowing order:
- * 1. ld_library_path (Think of this as namespace-local LD_LIBRARY_PATH)
- * 2. In directories specified by DT_RUNPATH of the "needed by" binary.
- * 3. deault_library_path (This of this as namespace-local default library path)
- *
- * When type is ANDROID_NAMESPACE_TYPE_ISOLATED the resulting namespace requires all of
- * the libraries to be on the search path or under the permitted_when_isolated_path;
- * the search_path is ld_library_path:default_library_path. Note that the
- * permitted_when_isolated_path path is not part of the search_path and
- * does not affect the search order. It is a way to allow loading libraries from specific
- * locations when using absolute path.
- * If a library or any of its dependencies are outside of the permitted_when_isolated_path
- * and search_path, and it is not part of the public namespace dlopen will fail.
- */
-extern struct android_namespace_t* android_create_namespace(
-    const char* name, const char* ld_library_path, const char* default_library_path, uint64_t type,
-    const char* permitted_when_isolated_path, struct android_namespace_t* parent);
-
-/*
- * Creates a link between namespaces. Every link has list of sonames of
- * shared libraries. These are the libraries which are accessible from
- * namespace 'from' but loaded within namespace 'to' context.
- * When to namespace is nullptr this function establishes a link between
- * 'from' namespace and the default namespace.
- *
- * The lookup order of the libraries in namespaces with links is following:
- * 1. Look inside current namespace using 'this' namespace search path.
- * 2. Look in linked namespaces
- * 2.1. Perform soname check - if library soname is not in the list of shared
- *      libraries sonames skip this link, otherwise
- * 2.2. Search library using linked namespace search path. Note that this
- *      step will not go deeper into linked namespaces for this library but
- *      will do so for DT_NEEDED libraries.
- */
-extern bool android_link_namespaces(struct android_namespace_t* from,
-                                    struct android_namespace_t* to,
-                                    const char* shared_libs_sonames);
-
-extern struct android_namespace_t* android_get_exported_namespace(const char* name);
-
-__END_DECLS
-
-#endif /* __ANDROID_DLEXT_NAMESPACES_H__ */
diff --git a/libnativeloader/include/nativeloader/native_loader.h b/libnativeloader/include/nativeloader/native_loader.h
deleted file mode 100644
index 51fb875..0000000
--- a/libnativeloader/include/nativeloader/native_loader.h
+++ /dev/null
@@ -1,78 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef NATIVE_LOADER_H_
-#define NATIVE_LOADER_H_
-
-#include <stdbool.h>
-#include <stdint.h>
-#include "jni.h"
-#if defined(__ANDROID__)
-#include <android/dlext.h>
-#endif
-
-#ifdef __cplusplus
-namespace android {
-extern "C" {
-#endif  // __cplusplus
-
-// README: the char** error message parameter being passed
-// to the methods below need to be freed through calling NativeLoaderFreeErrorMessage.
-// It's the caller's responsibility to call that method.
-
-__attribute__((visibility("default")))
-void InitializeNativeLoader();
-
-__attribute__((visibility("default"))) jstring CreateClassLoaderNamespace(
-    JNIEnv* env, int32_t target_sdk_version, jobject class_loader, bool is_shared, jstring dex_path,
-    jstring library_path, jstring permitted_path);
-
-__attribute__((visibility("default"))) void* OpenNativeLibrary(
-    JNIEnv* env, int32_t target_sdk_version, const char* path, jobject class_loader,
-    const char* caller_location, jstring library_path, bool* needs_native_bridge, char** error_msg);
-
-__attribute__((visibility("default"))) bool CloseNativeLibrary(void* handle,
-                                                               const bool needs_native_bridge,
-                                                               char** error_msg);
-
-__attribute__((visibility("default"))) void NativeLoaderFreeErrorMessage(char* msg);
-
-#if defined(__ANDROID__)
-// Look up linker namespace by class_loader. Returns nullptr if
-// there is no namespace associated with the class_loader.
-// TODO(b/79940628): move users to FindNativeLoaderNamespaceByClassLoader and remove this function.
-__attribute__((visibility("default"))) struct android_namespace_t* FindNamespaceByClassLoader(
-    JNIEnv* env, jobject class_loader);
-// That version works with native bridge namespaces, but requires use of OpenNativeLibrary.
-struct NativeLoaderNamespace;
-__attribute__((visibility("default"))) struct NativeLoaderNamespace*
-FindNativeLoaderNamespaceByClassLoader(JNIEnv* env, jobject class_loader);
-// Load library.  Unlinke OpenNativeLibrary above couldn't create namespace on demand, but does
-// not require access to JNIEnv either.
-__attribute__((visibility("default"))) void* OpenNativeLibraryInNamespace(
-    struct NativeLoaderNamespace* ns, const char* path, bool* needs_native_bridge,
-    char** error_msg);
-#endif
-
-__attribute__((visibility("default")))
-void ResetNativeLoader();
-
-#ifdef __cplusplus
-}  // extern "C"
-}  // namespace android
-#endif  // __cplusplus
-
-#endif  // NATIVE_BRIDGE_H_
diff --git a/libnativeloader/libnativeloader.map.txt b/libnativeloader/libnativeloader.map.txt
deleted file mode 100644
index 40c30bd..0000000
--- a/libnativeloader/libnativeloader.map.txt
+++ /dev/null
@@ -1,31 +0,0 @@
-#
-# Copyright (C) 2019 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-#  Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# TODO(b/122710865): Prune these uses once the runtime APEX is complete.
-LIBNATIVELOADER_1 {
-  global:
-    OpenNativeLibrary;
-    InitializeNativeLoader;
-    ResetNativeLoader;
-    CloseNativeLibrary;
-    OpenNativeLibraryInNamespace;
-    FindNamespaceByClassLoader;
-    FindNativeLoaderNamespaceByClassLoader;
-    CreateClassLoaderNamespace;
-    NativeLoaderFreeErrorMessage;
-  local:
-    *;
-};
diff --git a/libnativeloader/library_namespaces.cpp b/libnativeloader/library_namespaces.cpp
deleted file mode 100644
index a9eea8c..0000000
--- a/libnativeloader/library_namespaces.cpp
+++ /dev/null
@@ -1,340 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#include "library_namespaces.h"
-
-#include <dirent.h>
-#include <dlfcn.h>
-
-#include <regex>
-#include <string>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/macros.h>
-#include <android-base/properties.h>
-#include <android-base/strings.h>
-#include <nativehelper/ScopedUtfChars.h>
-
-#include "nativeloader/dlext_namespaces.h"
-#include "public_libraries.h"
-#include "utils.h"
-
-using android::base::Error;
-
-namespace android::nativeloader {
-
-namespace {
-// The device may be configured to have the vendor libraries loaded to a separate namespace.
-// For historical reasons this namespace was named sphal but effectively it is intended
-// to use to load vendor libraries to separate namespace with controlled interface between
-// vendor and system namespaces.
-constexpr const char* kVendorNamespaceName = "sphal";
-constexpr const char* kVndkNamespaceName = "vndk";
-constexpr const char* kRuntimeNamespaceName = "runtime";
-constexpr const char* kNeuralNetworksNamespaceName = "neuralnetworks";
-
-// classloader-namespace is a linker namespace that is created for the loaded
-// app. To be specific, it is created for the app classloader. When
-// System.load() is called from a Java class that is loaded from the
-// classloader, the classloader-namespace namespace associated with that
-// classloader is selected for dlopen. The namespace is configured so that its
-// search path is set to the app-local JNI directory and it is linked to the
-// platform namespace with the names of libs listed in the public.libraries.txt.
-// This way an app can only load its own JNI libraries along with the public libs.
-constexpr const char* kClassloaderNamespaceName = "classloader-namespace";
-// Same thing for vendor APKs.
-constexpr const char* kVendorClassloaderNamespaceName = "vendor-classloader-namespace";
-
-// (http://b/27588281) This is a workaround for apps using custom classloaders and calling
-// System.load() with an absolute path which is outside of the classloader library search path.
-// This list includes all directories app is allowed to access this way.
-constexpr const char* kWhitelistedDirectories = "/data:/mnt/expand";
-
-constexpr const char* kVendorLibPath = "/vendor/" LIB;
-constexpr const char* kProductLibPath = "/product/" LIB ":/system/product/" LIB;
-
-const std::regex kVendorDexPathRegex("(^|:)/vendor/");
-const std::regex kProductDexPathRegex("(^|:)(/system)?/product/");
-
-// Define origin of APK if it is from vendor partition or product partition
-typedef enum {
-  APK_ORIGIN_DEFAULT = 0,
-  APK_ORIGIN_VENDOR = 1,
-  APK_ORIGIN_PRODUCT = 2,
-} ApkOrigin;
-
-jobject GetParentClassLoader(JNIEnv* env, jobject class_loader) {
-  jclass class_loader_class = env->FindClass("java/lang/ClassLoader");
-  jmethodID get_parent =
-      env->GetMethodID(class_loader_class, "getParent", "()Ljava/lang/ClassLoader;");
-
-  return env->CallObjectMethod(class_loader, get_parent);
-}
-
-ApkOrigin GetApkOriginFromDexPath(JNIEnv* env, jstring dex_path) {
-  ApkOrigin apk_origin = APK_ORIGIN_DEFAULT;
-
-  if (dex_path != nullptr) {
-    ScopedUtfChars dex_path_utf_chars(env, dex_path);
-
-    if (std::regex_search(dex_path_utf_chars.c_str(), kVendorDexPathRegex)) {
-      apk_origin = APK_ORIGIN_VENDOR;
-    }
-
-    if (std::regex_search(dex_path_utf_chars.c_str(), kProductDexPathRegex)) {
-      LOG_ALWAYS_FATAL_IF(apk_origin == APK_ORIGIN_VENDOR,
-                          "Dex path contains both vendor and product partition : %s",
-                          dex_path_utf_chars.c_str());
-
-      apk_origin = APK_ORIGIN_PRODUCT;
-    }
-  }
-  return apk_origin;
-}
-
-}  // namespace
-
-void LibraryNamespaces::Initialize() {
-  // Once public namespace is initialized there is no
-  // point in running this code - it will have no effect
-  // on the current list of public libraries.
-  if (initialized_) {
-    return;
-  }
-
-  // android_init_namespaces() expects all the public libraries
-  // to be loaded so that they can be found by soname alone.
-  //
-  // TODO(dimitry): this is a bit misleading since we do not know
-  // if the vendor public library is going to be opened from /vendor/lib
-  // we might as well end up loading them from /system/lib or /product/lib
-  // For now we rely on CTS test to catch things like this but
-  // it should probably be addressed in the future.
-  for (const auto& soname : android::base::Split(default_public_libraries(), ":")) {
-    LOG_ALWAYS_FATAL_IF(dlopen(soname.c_str(), RTLD_NOW | RTLD_NODELETE) == nullptr,
-                        "Error preloading public library %s: %s", soname.c_str(), dlerror());
-  }
-}
-
-Result<NativeLoaderNamespace*> LibraryNamespaces::Create(JNIEnv* env, uint32_t target_sdk_version,
-                                                         jobject class_loader, bool is_shared,
-                                                         jstring dex_path,
-                                                         jstring java_library_path,
-                                                         jstring java_permitted_path) {
-  std::string library_path;  // empty string by default.
-
-  if (java_library_path != nullptr) {
-    ScopedUtfChars library_path_utf_chars(env, java_library_path);
-    library_path = library_path_utf_chars.c_str();
-  }
-
-  ApkOrigin apk_origin = GetApkOriginFromDexPath(env, dex_path);
-
-  // (http://b/27588281) This is a workaround for apps using custom
-  // classloaders and calling System.load() with an absolute path which
-  // is outside of the classloader library search path.
-  //
-  // This part effectively allows such a classloader to access anything
-  // under /data and /mnt/expand
-  std::string permitted_path = kWhitelistedDirectories;
-
-  if (java_permitted_path != nullptr) {
-    ScopedUtfChars path(env, java_permitted_path);
-    if (path.c_str() != nullptr && path.size() > 0) {
-      permitted_path = permitted_path + ":" + path.c_str();
-    }
-  }
-
-  // Initialize the anonymous namespace with the first non-empty library path.
-  Result<void> ret;
-  if (!library_path.empty() && !initialized_ &&
-      !(ret = InitPublicNamespace(library_path.c_str()))) {
-    return ret.error();
-  }
-
-  LOG_ALWAYS_FATAL_IF(FindNamespaceByClassLoader(env, class_loader) != nullptr,
-                      "There is already a namespace associated with this classloader");
-
-  std::string system_exposed_libraries = default_public_libraries();
-  const char* namespace_name = kClassloaderNamespaceName;
-  bool unbundled_vendor_or_product_app = false;
-  if ((apk_origin == APK_ORIGIN_VENDOR ||
-       (apk_origin == APK_ORIGIN_PRODUCT && target_sdk_version > 29)) &&
-      !is_shared) {
-    unbundled_vendor_or_product_app = true;
-    // For vendor / product apks, give access to the vendor / product lib even though
-    // they are treated as unbundled; the libs and apks are still bundled
-    // together in the vendor / product partition.
-    const char* origin_partition;
-    const char* origin_lib_path;
-
-    switch (apk_origin) {
-      case APK_ORIGIN_VENDOR:
-        origin_partition = "vendor";
-        origin_lib_path = kVendorLibPath;
-        break;
-      case APK_ORIGIN_PRODUCT:
-        origin_partition = "product";
-        origin_lib_path = kProductLibPath;
-        break;
-      default:
-        origin_partition = "unknown";
-        origin_lib_path = "";
-    }
-    library_path = library_path + ":" + origin_lib_path;
-    permitted_path = permitted_path + ":" + origin_lib_path;
-
-    // Also give access to LLNDK libraries since they are available to vendors
-    system_exposed_libraries = system_exposed_libraries + ":" + llndk_libraries().c_str();
-
-    // Different name is useful for debugging
-    namespace_name = kVendorClassloaderNamespaceName;
-    ALOGD("classloader namespace configured for unbundled %s apk. library_path=%s",
-          origin_partition, library_path.c_str());
-  } else {
-    // extended public libraries are NOT available to vendor apks, otherwise it
-    // would be system->vendor violation.
-    if (!extended_public_libraries().empty()) {
-      system_exposed_libraries = system_exposed_libraries + ':' + extended_public_libraries();
-    }
-  }
-
-  // Create the app namespace
-  NativeLoaderNamespace* parent_ns = FindParentNamespaceByClassLoader(env, class_loader);
-  auto app_ns =
-      NativeLoaderNamespace::Create(namespace_name, library_path, permitted_path, parent_ns,
-                                    is_shared, target_sdk_version < 24 /* is_greylist_enabled */);
-  if (!app_ns) {
-    return app_ns.error();
-  }
-
-  // ... and link to other namespaces to allow access to some public libraries
-  bool is_bridged = app_ns->IsBridged();
-
-  auto platform_ns = NativeLoaderNamespace::GetPlatformNamespace(is_bridged);
-  if (!platform_ns) {
-    return platform_ns.error();
-  }
-
-  auto linked = app_ns->Link(*platform_ns, system_exposed_libraries);
-  if (!linked) {
-    return linked.error();
-  }
-
-  auto runtime_ns = NativeLoaderNamespace::GetExportedNamespace(kRuntimeNamespaceName, is_bridged);
-  // Runtime apex does not exist in host, and under certain build conditions.
-  if (runtime_ns) {
-    linked = app_ns->Link(*runtime_ns, runtime_public_libraries());
-    if (!linked) {
-      return linked.error();
-    }
-  }
-
-  // Give access to NNAPI libraries (apex-updated LLNDK library).
-  auto nnapi_ns =
-      NativeLoaderNamespace::GetExportedNamespace(kNeuralNetworksNamespaceName, is_bridged);
-  if (nnapi_ns) {
-    linked = app_ns->Link(*nnapi_ns, neuralnetworks_public_libraries());
-    if (!linked) {
-      return linked.error();
-    }
-  }
-
-  // Give access to VNDK-SP libraries from the 'vndk' namespace.
-  if (unbundled_vendor_or_product_app && !vndksp_libraries().empty()) {
-    auto vndk_ns = NativeLoaderNamespace::GetExportedNamespace(kVndkNamespaceName, is_bridged);
-    if (vndk_ns) {
-      linked = app_ns->Link(*vndk_ns, vndksp_libraries());
-      if (!linked) {
-        return linked.error();
-      }
-    }
-  }
-
-  if (!vendor_public_libraries().empty()) {
-    auto vendor_ns = NativeLoaderNamespace::GetExportedNamespace(kVendorNamespaceName, is_bridged);
-    // when vendor_ns is not configured, link to the platform namespace
-    auto target_ns = vendor_ns ? vendor_ns : platform_ns;
-    if (target_ns) {
-      linked = app_ns->Link(*target_ns, vendor_public_libraries());
-      if (!linked) {
-        return linked.error();
-      }
-    }
-  }
-
-  namespaces_.push_back(std::make_pair(env->NewWeakGlobalRef(class_loader), *app_ns));
-
-  return &(namespaces_.back().second);
-}
-
-NativeLoaderNamespace* LibraryNamespaces::FindNamespaceByClassLoader(JNIEnv* env,
-                                                                     jobject class_loader) {
-  auto it = std::find_if(namespaces_.begin(), namespaces_.end(),
-                         [&](const std::pair<jweak, NativeLoaderNamespace>& value) {
-                           return env->IsSameObject(value.first, class_loader);
-                         });
-  if (it != namespaces_.end()) {
-    return &it->second;
-  }
-
-  return nullptr;
-}
-
-Result<void> LibraryNamespaces::InitPublicNamespace(const char* library_path) {
-  // Ask native bride if this apps library path should be handled by it
-  bool is_native_bridge = NativeBridgeIsPathSupported(library_path);
-
-  // (http://b/25844435) - Some apps call dlopen from generated code (mono jited
-  // code is one example) unknown to linker in which  case linker uses anonymous
-  // namespace. The second argument specifies the search path for the anonymous
-  // namespace which is the library_path of the classloader.
-  initialized_ = android_init_anonymous_namespace(default_public_libraries().c_str(),
-                                                  is_native_bridge ? nullptr : library_path);
-  if (!initialized_) {
-    return Error() << dlerror();
-  }
-
-  // and now initialize native bridge namespaces if necessary.
-  if (NativeBridgeInitialized()) {
-    initialized_ = NativeBridgeInitAnonymousNamespace(default_public_libraries().c_str(),
-                                                      is_native_bridge ? library_path : nullptr);
-    if (!initialized_) {
-      return Error() << NativeBridgeGetError();
-    }
-  }
-
-  return {};
-}
-
-NativeLoaderNamespace* LibraryNamespaces::FindParentNamespaceByClassLoader(JNIEnv* env,
-                                                                           jobject class_loader) {
-  jobject parent_class_loader = GetParentClassLoader(env, class_loader);
-
-  while (parent_class_loader != nullptr) {
-    NativeLoaderNamespace* ns;
-    if ((ns = FindNamespaceByClassLoader(env, parent_class_loader)) != nullptr) {
-      return ns;
-    }
-
-    parent_class_loader = GetParentClassLoader(env, parent_class_loader);
-  }
-
-  return nullptr;
-}
-
-}  // namespace android::nativeloader
diff --git a/libnativeloader/library_namespaces.h b/libnativeloader/library_namespaces.h
deleted file mode 100644
index e54bc0a..0000000
--- a/libnativeloader/library_namespaces.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#pragma once
-#if !defined(__ANDROID__)
-#error "Not available for host"
-#endif
-
-#define LOG_TAG "nativeloader"
-
-#include "native_loader_namespace.h"
-
-#include <list>
-#include <string>
-
-#include <android-base/result.h>
-#include <jni.h>
-
-namespace android::nativeloader {
-
-using android::base::Result;
-
-// LibraryNamespaces is a singleton object that manages NativeLoaderNamespace
-// objects for an app process. Its main job is to create (and configure) a new
-// NativeLoaderNamespace object for a Java ClassLoader, and to find an existing
-// object for a given ClassLoader.
-class LibraryNamespaces {
- public:
-  LibraryNamespaces() : initialized_(false) {}
-
-  LibraryNamespaces(LibraryNamespaces&&) = default;
-  LibraryNamespaces(const LibraryNamespaces&) = delete;
-  LibraryNamespaces& operator=(const LibraryNamespaces&) = delete;
-
-  void Initialize();
-  void Reset() {
-    namespaces_.clear();
-    initialized_ = false;
-  }
-  Result<NativeLoaderNamespace*> Create(JNIEnv* env, uint32_t target_sdk_version,
-                                        jobject class_loader, bool is_shared, jstring dex_path,
-                                        jstring java_library_path, jstring java_permitted_path);
-  NativeLoaderNamespace* FindNamespaceByClassLoader(JNIEnv* env, jobject class_loader);
-
- private:
-  Result<void> InitPublicNamespace(const char* library_path);
-  NativeLoaderNamespace* FindParentNamespaceByClassLoader(JNIEnv* env, jobject class_loader);
-
-  bool initialized_;
-  std::list<std::pair<jweak, NativeLoaderNamespace>> namespaces_;
-};
-
-}  // namespace android::nativeloader
diff --git a/libnativeloader/native_loader.cpp b/libnativeloader/native_loader.cpp
deleted file mode 100644
index 6d3c057..0000000
--- a/libnativeloader/native_loader.cpp
+++ /dev/null
@@ -1,254 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "nativeloader"
-
-#include "nativeloader/native_loader.h"
-
-#include <dlfcn.h>
-#include <sys/types.h>
-
-#include <memory>
-#include <mutex>
-#include <string>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/macros.h>
-#include <android-base/strings.h>
-#include <nativebridge/native_bridge.h>
-#include <nativehelper/ScopedUtfChars.h>
-
-#ifdef __ANDROID__
-#include <log/log.h>
-#include "library_namespaces.h"
-#include "nativeloader/dlext_namespaces.h"
-#endif
-
-namespace android {
-
-namespace {
-#if defined(__ANDROID__)
-using android::nativeloader::LibraryNamespaces;
-
-constexpr const char* kApexPath = "/apex/";
-
-std::mutex g_namespaces_mutex;
-LibraryNamespaces* g_namespaces = new LibraryNamespaces;
-
-android_namespace_t* FindExportedNamespace(const char* caller_location) {
-  std::string location = caller_location;
-  // Lots of implicit assumptions here: we expect `caller_location` to be of the form:
-  // /apex/com.android...modulename/...
-  //
-  // And we extract from it 'modulename', which is the name of the linker namespace.
-  if (android::base::StartsWith(location, kApexPath)) {
-    size_t slash_index = location.find_first_of('/', strlen(kApexPath));
-    LOG_ALWAYS_FATAL_IF((slash_index == std::string::npos),
-                        "Error finding namespace of apex: no slash in path %s", caller_location);
-    size_t dot_index = location.find_last_of('.', slash_index);
-    LOG_ALWAYS_FATAL_IF((dot_index == std::string::npos),
-                        "Error finding namespace of apex: no dot in apex name %s", caller_location);
-    std::string name = location.substr(dot_index + 1, slash_index - dot_index - 1);
-    android_namespace_t* boot_namespace = android_get_exported_namespace(name.c_str());
-    LOG_ALWAYS_FATAL_IF((boot_namespace == nullptr),
-                        "Error finding namespace of apex: no namespace called %s", name.c_str());
-    return boot_namespace;
-  }
-  return nullptr;
-}
-#endif  // #if defined(__ANDROID__)
-}  // namespace
-
-void InitializeNativeLoader() {
-#if defined(__ANDROID__)
-  std::lock_guard<std::mutex> guard(g_namespaces_mutex);
-  g_namespaces->Initialize();
-#endif
-}
-
-void ResetNativeLoader() {
-#if defined(__ANDROID__)
-  std::lock_guard<std::mutex> guard(g_namespaces_mutex);
-  g_namespaces->Reset();
-#endif
-}
-
-jstring CreateClassLoaderNamespace(JNIEnv* env, int32_t target_sdk_version, jobject class_loader,
-                                   bool is_shared, jstring dex_path, jstring library_path,
-                                   jstring permitted_path) {
-#if defined(__ANDROID__)
-  std::lock_guard<std::mutex> guard(g_namespaces_mutex);
-  auto ns = g_namespaces->Create(env, target_sdk_version, class_loader, is_shared, dex_path,
-                                 library_path, permitted_path);
-  if (!ns) {
-    return env->NewStringUTF(ns.error().message().c_str());
-  }
-#else
-  UNUSED(env, target_sdk_version, class_loader, is_shared, dex_path, library_path, permitted_path);
-#endif
-  return nullptr;
-}
-
-void* OpenNativeLibrary(JNIEnv* env, int32_t target_sdk_version, const char* path,
-                        jobject class_loader, const char* caller_location, jstring library_path,
-                        bool* needs_native_bridge, char** error_msg) {
-#if defined(__ANDROID__)
-  UNUSED(target_sdk_version);
-  if (class_loader == nullptr) {
-    *needs_native_bridge = false;
-    if (caller_location != nullptr) {
-      android_namespace_t* boot_namespace = FindExportedNamespace(caller_location);
-      if (boot_namespace != nullptr) {
-        const android_dlextinfo dlextinfo = {
-            .flags = ANDROID_DLEXT_USE_NAMESPACE,
-            .library_namespace = boot_namespace,
-        };
-        void* handle = android_dlopen_ext(path, RTLD_NOW, &dlextinfo);
-        if (handle == nullptr) {
-          *error_msg = strdup(dlerror());
-        }
-        return handle;
-      }
-    }
-    void* handle = dlopen(path, RTLD_NOW);
-    if (handle == nullptr) {
-      *error_msg = strdup(dlerror());
-    }
-    return handle;
-  }
-
-  std::lock_guard<std::mutex> guard(g_namespaces_mutex);
-  NativeLoaderNamespace* ns;
-
-  if ((ns = g_namespaces->FindNamespaceByClassLoader(env, class_loader)) == nullptr) {
-    // This is the case where the classloader was not created by ApplicationLoaders
-    // In this case we create an isolated not-shared namespace for it.
-    Result<NativeLoaderNamespace*> isolated_ns =
-        g_namespaces->Create(env, target_sdk_version, class_loader, false /* is_shared */, nullptr,
-                             library_path, nullptr);
-    if (!isolated_ns) {
-      *error_msg = strdup(isolated_ns.error().message().c_str());
-      return nullptr;
-    } else {
-      ns = *isolated_ns;
-    }
-  }
-
-  return OpenNativeLibraryInNamespace(ns, path, needs_native_bridge, error_msg);
-#else
-  UNUSED(env, target_sdk_version, class_loader, caller_location);
-
-  // Do some best effort to emulate library-path support. It will not
-  // work for dependencies.
-  //
-  // Note: null has a special meaning and must be preserved.
-  std::string c_library_path;  // Empty string by default.
-  if (library_path != nullptr && path != nullptr && path[0] != '/') {
-    ScopedUtfChars library_path_utf_chars(env, library_path);
-    c_library_path = library_path_utf_chars.c_str();
-  }
-
-  std::vector<std::string> library_paths = base::Split(c_library_path, ":");
-
-  for (const std::string& lib_path : library_paths) {
-    *needs_native_bridge = false;
-    const char* path_arg;
-    std::string complete_path;
-    if (path == nullptr) {
-      // Preserve null.
-      path_arg = nullptr;
-    } else {
-      complete_path = lib_path;
-      if (!complete_path.empty()) {
-        complete_path.append("/");
-      }
-      complete_path.append(path);
-      path_arg = complete_path.c_str();
-    }
-    void* handle = dlopen(path_arg, RTLD_NOW);
-    if (handle != nullptr) {
-      return handle;
-    }
-    if (NativeBridgeIsSupported(path_arg)) {
-      *needs_native_bridge = true;
-      handle = NativeBridgeLoadLibrary(path_arg, RTLD_NOW);
-      if (handle != nullptr) {
-        return handle;
-      }
-      *error_msg = strdup(NativeBridgeGetError());
-    } else {
-      *error_msg = strdup(dlerror());
-    }
-  }
-  return nullptr;
-#endif
-}
-
-bool CloseNativeLibrary(void* handle, const bool needs_native_bridge, char** error_msg) {
-  bool success;
-  if (needs_native_bridge) {
-    success = (NativeBridgeUnloadLibrary(handle) == 0);
-    if (!success) {
-      *error_msg = strdup(NativeBridgeGetError());
-    }
-  } else {
-    success = (dlclose(handle) == 0);
-    if (!success) {
-      *error_msg = strdup(dlerror());
-    }
-  }
-
-  return success;
-}
-
-void NativeLoaderFreeErrorMessage(char* msg) {
-  // The error messages get allocated through strdup, so we must call free on them.
-  free(msg);
-}
-
-#if defined(__ANDROID__)
-void* OpenNativeLibraryInNamespace(NativeLoaderNamespace* ns, const char* path,
-                                   bool* needs_native_bridge, char** error_msg) {
-  auto handle = ns->Load(path);
-  if (!handle && error_msg != nullptr) {
-    *error_msg = strdup(handle.error().message().c_str());
-  }
-  if (needs_native_bridge != nullptr) {
-    *needs_native_bridge = ns->IsBridged();
-  }
-  return handle ? *handle : nullptr;
-}
-
-// native_bridge_namespaces are not supported for callers of this function.
-// This function will return nullptr in the case when application is running
-// on native bridge.
-android_namespace_t* FindNamespaceByClassLoader(JNIEnv* env, jobject class_loader) {
-  std::lock_guard<std::mutex> guard(g_namespaces_mutex);
-  NativeLoaderNamespace* ns = g_namespaces->FindNamespaceByClassLoader(env, class_loader);
-  if (ns != nullptr && !ns->IsBridged()) {
-    return ns->ToRawAndroidNamespace();
-  }
-  return nullptr;
-}
-
-NativeLoaderNamespace* FindNativeLoaderNamespaceByClassLoader(JNIEnv* env, jobject class_loader) {
-  std::lock_guard<std::mutex> guard(g_namespaces_mutex);
-  return g_namespaces->FindNamespaceByClassLoader(env, class_loader);
-}
-#endif
-
-};  // namespace android
diff --git a/libnativeloader/native_loader_lazy.cpp b/libnativeloader/native_loader_lazy.cpp
deleted file mode 100644
index 2eb1203..0000000
--- a/libnativeloader/native_loader_lazy.cpp
+++ /dev/null
@@ -1,102 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "nativeloader/native_loader.h"
-#define LOG_TAG "nativeloader"
-
-#include <dlfcn.h>
-#include <errno.h>
-#include <string.h>
-
-#include <log/log.h>
-
-namespace android {
-
-namespace {
-
-void* GetLibHandle() {
-  static void* handle = dlopen("libnativeloader.so", RTLD_NOW);
-  LOG_FATAL_IF(handle == nullptr, "Failed to load libnativeloader.so: %s", dlerror());
-  return handle;
-}
-
-template <typename FuncPtr>
-FuncPtr GetFuncPtr(const char* function_name) {
-  auto f = reinterpret_cast<FuncPtr>(dlsym(GetLibHandle(), function_name));
-  LOG_FATAL_IF(f == nullptr, "Failed to get address of %s: %s", function_name, dlerror());
-  return f;
-}
-
-#define GET_FUNC_PTR(name) GetFuncPtr<decltype(&name)>(#name)
-
-}  // namespace
-
-void InitializeNativeLoader() {
-  static auto f = GET_FUNC_PTR(InitializeNativeLoader);
-  return f();
-}
-
-jstring CreateClassLoaderNamespace(JNIEnv* env, int32_t target_sdk_version, jobject class_loader,
-                                   bool is_shared, jstring dex_path, jstring library_path,
-                                   jstring permitted_path) {
-  static auto f = GET_FUNC_PTR(CreateClassLoaderNamespace);
-  return f(env, target_sdk_version, class_loader, is_shared, dex_path, library_path,
-           permitted_path);
-}
-
-void* OpenNativeLibrary(JNIEnv* env, int32_t target_sdk_version, const char* path,
-                        jobject class_loader, const char* caller_location, jstring library_path,
-                        bool* needs_native_bridge, char** error_msg) {
-  static auto f = GET_FUNC_PTR(OpenNativeLibrary);
-  return f(env, target_sdk_version, path, class_loader, caller_location, library_path,
-           needs_native_bridge, error_msg);
-}
-
-bool CloseNativeLibrary(void* handle, const bool needs_native_bridge, char** error_msg) {
-  static auto f = GET_FUNC_PTR(CloseNativeLibrary);
-  return f(handle, needs_native_bridge, error_msg);
-}
-
-void NativeLoaderFreeErrorMessage(char* msg) {
-  static auto f = GET_FUNC_PTR(NativeLoaderFreeErrorMessage);
-  return f(msg);
-}
-
-struct android_namespace_t* FindNamespaceByClassLoader(JNIEnv* env, jobject class_loader) {
-  static auto f = GET_FUNC_PTR(FindNamespaceByClassLoader);
-  return f(env, class_loader);
-}
-
-struct NativeLoaderNamespace* FindNativeLoaderNamespaceByClassLoader(JNIEnv* env,
-                                                                     jobject class_loader) {
-  static auto f = GET_FUNC_PTR(FindNativeLoaderNamespaceByClassLoader);
-  return f(env, class_loader);
-}
-
-void* OpenNativeLibraryInNamespace(struct NativeLoaderNamespace* ns, const char* path,
-                                   bool* needs_native_bridge, char** error_msg) {
-  static auto f = GET_FUNC_PTR(OpenNativeLibraryInNamespace);
-  return f(ns, path, needs_native_bridge, error_msg);
-}
-
-void ResetNativeLoader() {
-  static auto f = GET_FUNC_PTR(ResetNativeLoader);
-  return f();
-}
-
-#undef GET_FUNC_PTR
-
-}  // namespace android
diff --git a/libnativeloader/native_loader_namespace.cpp b/libnativeloader/native_loader_namespace.cpp
deleted file mode 100644
index 4add6e6..0000000
--- a/libnativeloader/native_loader_namespace.cpp
+++ /dev/null
@@ -1,167 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "nativeloader"
-
-#include "native_loader_namespace.h"
-
-#include <dlfcn.h>
-
-#include <functional>
-
-#include <android-base/strings.h>
-#include <log/log.h>
-#include <nativebridge/native_bridge.h>
-
-#include "nativeloader/dlext_namespaces.h"
-
-using android::base::Error;
-using android::base::Errorf;
-
-namespace android {
-
-namespace {
-
-constexpr const char* kDefaultNamespaceName = "default";
-constexpr const char* kPlatformNamespaceName = "platform";
-
-std::string GetLinkerError(bool is_bridged) {
-  const char* msg = is_bridged ? NativeBridgeGetError() : dlerror();
-  if (msg == nullptr) {
-    return "no error";
-  }
-  return std::string(msg);
-}
-
-}  // namespace
-
-Result<NativeLoaderNamespace> NativeLoaderNamespace::GetExportedNamespace(const std::string& name,
-                                                                          bool is_bridged) {
-  if (!is_bridged) {
-    auto raw = android_get_exported_namespace(name.c_str());
-    if (raw != nullptr) {
-      return NativeLoaderNamespace(name, raw);
-    }
-  } else {
-    auto raw = NativeBridgeGetExportedNamespace(name.c_str());
-    if (raw != nullptr) {
-      return NativeLoaderNamespace(name, raw);
-    }
-  }
-  return Errorf("namespace {} does not exist or exported", name);
-}
-
-// The platform namespace is called "default" for binaries in /system and
-// "platform" for those in the Runtime APEX. Try "platform" first since
-// "default" always exists.
-Result<NativeLoaderNamespace> NativeLoaderNamespace::GetPlatformNamespace(bool is_bridged) {
-  auto ns = GetExportedNamespace(kPlatformNamespaceName, is_bridged);
-  if (ns) return ns;
-  ns = GetExportedNamespace(kDefaultNamespaceName, is_bridged);
-  if (ns) return ns;
-
-  // If nothing is found, return NativeLoaderNamespace constructed from nullptr.
-  // nullptr also means default namespace to the linker.
-  if (!is_bridged) {
-    return NativeLoaderNamespace(kDefaultNamespaceName, static_cast<android_namespace_t*>(nullptr));
-  } else {
-    return NativeLoaderNamespace(kDefaultNamespaceName,
-                                 static_cast<native_bridge_namespace_t*>(nullptr));
-  }
-}
-
-Result<NativeLoaderNamespace> NativeLoaderNamespace::Create(
-    const std::string& name, const std::string& search_paths, const std::string& permitted_paths,
-    const NativeLoaderNamespace* parent, bool is_shared, bool is_greylist_enabled) {
-  bool is_bridged = false;
-  if (parent != nullptr) {
-    is_bridged = parent->IsBridged();
-  } else if (!search_paths.empty()) {
-    is_bridged = NativeBridgeIsPathSupported(search_paths.c_str());
-  }
-
-  // Fall back to the platform namespace if no parent is set.
-  auto platform_ns = GetPlatformNamespace(is_bridged);
-  if (!platform_ns) {
-    return platform_ns.error();
-  }
-  const NativeLoaderNamespace& effective_parent = parent != nullptr ? *parent : *platform_ns;
-
-  uint64_t type = ANDROID_NAMESPACE_TYPE_ISOLATED;
-  if (is_shared) {
-    type |= ANDROID_NAMESPACE_TYPE_SHARED;
-  }
-  if (is_greylist_enabled) {
-    type |= ANDROID_NAMESPACE_TYPE_GREYLIST_ENABLED;
-  }
-
-  if (!is_bridged) {
-    android_namespace_t* raw =
-        android_create_namespace(name.c_str(), nullptr, search_paths.c_str(), type,
-                                 permitted_paths.c_str(), effective_parent.ToRawAndroidNamespace());
-    if (raw != nullptr) {
-      return NativeLoaderNamespace(name, raw);
-    }
-  } else {
-    native_bridge_namespace_t* raw = NativeBridgeCreateNamespace(
-        name.c_str(), nullptr, search_paths.c_str(), type, permitted_paths.c_str(),
-        effective_parent.ToRawNativeBridgeNamespace());
-    if (raw != nullptr) {
-      return NativeLoaderNamespace(name, raw);
-    }
-  }
-  return Errorf("failed to create {} namespace name:{}, search_paths:{}, permitted_paths:{}",
-                is_bridged ? "bridged" : "native", name, search_paths, permitted_paths);
-}
-
-Result<void> NativeLoaderNamespace::Link(const NativeLoaderNamespace& target,
-                                         const std::string& shared_libs) const {
-  LOG_ALWAYS_FATAL_IF(shared_libs.empty(), "empty share lib when linking %s to %s",
-                      this->name().c_str(), target.name().c_str());
-  if (!IsBridged()) {
-    if (android_link_namespaces(this->ToRawAndroidNamespace(), target.ToRawAndroidNamespace(),
-                                shared_libs.c_str())) {
-      return {};
-    }
-  } else {
-    if (NativeBridgeLinkNamespaces(this->ToRawNativeBridgeNamespace(),
-                                   target.ToRawNativeBridgeNamespace(), shared_libs.c_str())) {
-      return {};
-    }
-  }
-  return Error() << GetLinkerError(IsBridged());
-}
-
-Result<void*> NativeLoaderNamespace::Load(const char* lib_name) const {
-  if (!IsBridged()) {
-    android_dlextinfo extinfo;
-    extinfo.flags = ANDROID_DLEXT_USE_NAMESPACE;
-    extinfo.library_namespace = this->ToRawAndroidNamespace();
-    void* handle = android_dlopen_ext(lib_name, RTLD_NOW, &extinfo);
-    if (handle != nullptr) {
-      return handle;
-    }
-  } else {
-    void* handle =
-        NativeBridgeLoadLibraryExt(lib_name, RTLD_NOW, this->ToRawNativeBridgeNamespace());
-    if (handle != nullptr) {
-      return handle;
-    }
-  }
-  return Error() << GetLinkerError(IsBridged());
-}
-
-}  // namespace android
diff --git a/libnativeloader/native_loader_namespace.h b/libnativeloader/native_loader_namespace.h
deleted file mode 100644
index 29b759c..0000000
--- a/libnativeloader/native_loader_namespace.h
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#pragma once
-#if defined(__ANDROID__)
-
-#include <string>
-#include <variant>
-#include <vector>
-
-#include <android-base/logging.h>
-#include <android-base/result.h>
-#include <android/dlext.h>
-#include <log/log.h>
-#include <nativebridge/native_bridge.h>
-
-namespace android {
-
-using android::base::Result;
-
-// NativeLoaderNamespace abstracts a linker namespace for the native
-// architecture (ex: arm on arm) or the translated architecture (ex: arm on
-// x86). Instances of this class are managed by LibraryNamespaces object.
-struct NativeLoaderNamespace {
- public:
-  static Result<NativeLoaderNamespace> Create(const std::string& name,
-                                              const std::string& search_paths,
-                                              const std::string& permitted_paths,
-                                              const NativeLoaderNamespace* parent, bool is_shared,
-                                              bool is_greylist_enabled);
-
-  NativeLoaderNamespace(NativeLoaderNamespace&&) = default;
-  NativeLoaderNamespace(const NativeLoaderNamespace&) = default;
-  NativeLoaderNamespace& operator=(const NativeLoaderNamespace&) = default;
-
-  android_namespace_t* ToRawAndroidNamespace() const { return std::get<0>(raw_); }
-  native_bridge_namespace_t* ToRawNativeBridgeNamespace() const { return std::get<1>(raw_); }
-
-  std::string name() const { return name_; }
-  bool IsBridged() const { return raw_.index() == 1; }
-
-  Result<void> Link(const NativeLoaderNamespace& target, const std::string& shared_libs) const;
-  Result<void*> Load(const char* lib_name) const;
-
-  static Result<NativeLoaderNamespace> GetExportedNamespace(const std::string& name,
-                                                            bool is_bridged);
-  static Result<NativeLoaderNamespace> GetPlatformNamespace(bool is_bridged);
-
- private:
-  explicit NativeLoaderNamespace(const std::string& name, android_namespace_t* ns)
-      : name_(name), raw_(ns) {}
-  explicit NativeLoaderNamespace(const std::string& name, native_bridge_namespace_t* ns)
-      : name_(name), raw_(ns) {}
-
-  std::string name_;
-  std::variant<android_namespace_t*, native_bridge_namespace_t*> raw_;
-};
-
-}  // namespace android
-#endif  // #if defined(__ANDROID__)
diff --git a/libnativeloader/native_loader_test.cpp b/libnativeloader/native_loader_test.cpp
deleted file mode 100644
index b939eee..0000000
--- a/libnativeloader/native_loader_test.cpp
+++ /dev/null
@@ -1,574 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <dlfcn.h>
-#include <memory>
-#include <unordered_map>
-
-#include <android-base/strings.h>
-#include <gmock/gmock.h>
-#include <gtest/gtest.h>
-#include <jni.h>
-
-#include "native_loader_namespace.h"
-#include "nativeloader/dlext_namespaces.h"
-#include "nativeloader/native_loader.h"
-#include "public_libraries.h"
-
-using namespace ::testing;
-
-namespace android {
-namespace nativeloader {
-
-// gmock interface that represents interested platform APIs on libdl and libnativebridge
-class Platform {
- public:
-  virtual ~Platform() {}
-
-  // libdl APIs
-  virtual void* dlopen(const char* filename, int flags) = 0;
-  virtual int dlclose(void* handle) = 0;
-  virtual char* dlerror(void) = 0;
-
-  // These mock_* are the APIs semantically the same across libdl and libnativebridge.
-  // Instead of having two set of mock APIs for the two, define only one set with an additional
-  // argument 'bool bridged' to identify the context (i.e., called for libdl or libnativebridge).
-  typedef char* mock_namespace_handle;
-  virtual bool mock_init_anonymous_namespace(bool bridged, const char* sonames,
-                                             const char* search_paths) = 0;
-  virtual mock_namespace_handle mock_create_namespace(
-      bool bridged, const char* name, const char* ld_library_path, const char* default_library_path,
-      uint64_t type, const char* permitted_when_isolated_path, mock_namespace_handle parent) = 0;
-  virtual bool mock_link_namespaces(bool bridged, mock_namespace_handle from,
-                                    mock_namespace_handle to, const char* sonames) = 0;
-  virtual mock_namespace_handle mock_get_exported_namespace(bool bridged, const char* name) = 0;
-  virtual void* mock_dlopen_ext(bool bridged, const char* filename, int flags,
-                                mock_namespace_handle ns) = 0;
-
-  // libnativebridge APIs for which libdl has no corresponding APIs
-  virtual bool NativeBridgeInitialized() = 0;
-  virtual const char* NativeBridgeGetError() = 0;
-  virtual bool NativeBridgeIsPathSupported(const char*) = 0;
-  virtual bool NativeBridgeIsSupported(const char*) = 0;
-
-  // To mock "ClassLoader Object.getParent()"
-  virtual const char* JniObject_getParent(const char*) = 0;
-};
-
-// The mock does not actually create a namespace object. But simply casts the pointer to the
-// string for the namespace name as the handle to the namespace object.
-#define TO_ANDROID_NAMESPACE(str) \
-  reinterpret_cast<struct android_namespace_t*>(const_cast<char*>(str))
-
-#define TO_BRIDGED_NAMESPACE(str) \
-  reinterpret_cast<struct native_bridge_namespace_t*>(const_cast<char*>(str))
-
-#define TO_MOCK_NAMESPACE(ns) reinterpret_cast<Platform::mock_namespace_handle>(ns)
-
-// These represents built-in namespaces created by the linker according to ld.config.txt
-static std::unordered_map<std::string, Platform::mock_namespace_handle> namespaces = {
-    {"platform", TO_MOCK_NAMESPACE(TO_ANDROID_NAMESPACE("platform"))},
-    {"default", TO_MOCK_NAMESPACE(TO_ANDROID_NAMESPACE("default"))},
-    {"runtime", TO_MOCK_NAMESPACE(TO_ANDROID_NAMESPACE("runtime"))},
-    {"sphal", TO_MOCK_NAMESPACE(TO_ANDROID_NAMESPACE("sphal"))},
-    {"vndk", TO_MOCK_NAMESPACE(TO_ANDROID_NAMESPACE("vndk"))},
-    {"neuralnetworks", TO_MOCK_NAMESPACE(TO_ANDROID_NAMESPACE("neuralnetworks"))},
-};
-
-// The actual gmock object
-class MockPlatform : public Platform {
- public:
-  MockPlatform(bool is_bridged) : is_bridged_(is_bridged) {
-    ON_CALL(*this, NativeBridgeIsSupported(_)).WillByDefault(Return(is_bridged_));
-    ON_CALL(*this, NativeBridgeIsPathSupported(_)).WillByDefault(Return(is_bridged_));
-    ON_CALL(*this, mock_get_exported_namespace(_, _))
-        .WillByDefault(Invoke([](bool, const char* name) -> mock_namespace_handle {
-          if (namespaces.find(name) != namespaces.end()) {
-            return namespaces[name];
-          }
-          return TO_MOCK_NAMESPACE(TO_ANDROID_NAMESPACE("(namespace not found"));
-        }));
-  }
-
-  // Mocking libdl APIs
-  MOCK_METHOD2(dlopen, void*(const char*, int));
-  MOCK_METHOD1(dlclose, int(void*));
-  MOCK_METHOD0(dlerror, char*());
-
-  // Mocking the common APIs
-  MOCK_METHOD3(mock_init_anonymous_namespace, bool(bool, const char*, const char*));
-  MOCK_METHOD7(mock_create_namespace,
-               mock_namespace_handle(bool, const char*, const char*, const char*, uint64_t,
-                                     const char*, mock_namespace_handle));
-  MOCK_METHOD4(mock_link_namespaces,
-               bool(bool, mock_namespace_handle, mock_namespace_handle, const char*));
-  MOCK_METHOD2(mock_get_exported_namespace, mock_namespace_handle(bool, const char*));
-  MOCK_METHOD4(mock_dlopen_ext, void*(bool, const char*, int, mock_namespace_handle));
-
-  // Mocking libnativebridge APIs
-  MOCK_METHOD0(NativeBridgeInitialized, bool());
-  MOCK_METHOD0(NativeBridgeGetError, const char*());
-  MOCK_METHOD1(NativeBridgeIsPathSupported, bool(const char*));
-  MOCK_METHOD1(NativeBridgeIsSupported, bool(const char*));
-
-  // Mocking "ClassLoader Object.getParent()"
-  MOCK_METHOD1(JniObject_getParent, const char*(const char*));
-
- private:
-  bool is_bridged_;
-};
-
-static std::unique_ptr<MockPlatform> mock;
-
-// Provide C wrappers for the mock object.
-extern "C" {
-void* dlopen(const char* file, int flag) {
-  return mock->dlopen(file, flag);
-}
-
-int dlclose(void* handle) {
-  return mock->dlclose(handle);
-}
-
-char* dlerror(void) {
-  return mock->dlerror();
-}
-
-bool android_init_anonymous_namespace(const char* sonames, const char* search_path) {
-  return mock->mock_init_anonymous_namespace(false, sonames, search_path);
-}
-
-struct android_namespace_t* android_create_namespace(const char* name, const char* ld_library_path,
-                                                     const char* default_library_path,
-                                                     uint64_t type,
-                                                     const char* permitted_when_isolated_path,
-                                                     struct android_namespace_t* parent) {
-  return TO_ANDROID_NAMESPACE(
-      mock->mock_create_namespace(false, name, ld_library_path, default_library_path, type,
-                                  permitted_when_isolated_path, TO_MOCK_NAMESPACE(parent)));
-}
-
-bool android_link_namespaces(struct android_namespace_t* from, struct android_namespace_t* to,
-                             const char* sonames) {
-  return mock->mock_link_namespaces(false, TO_MOCK_NAMESPACE(from), TO_MOCK_NAMESPACE(to), sonames);
-}
-
-struct android_namespace_t* android_get_exported_namespace(const char* name) {
-  return TO_ANDROID_NAMESPACE(mock->mock_get_exported_namespace(false, name));
-}
-
-void* android_dlopen_ext(const char* filename, int flags, const android_dlextinfo* info) {
-  return mock->mock_dlopen_ext(false, filename, flags, TO_MOCK_NAMESPACE(info->library_namespace));
-}
-
-// libnativebridge APIs
-bool NativeBridgeIsSupported(const char* libpath) {
-  return mock->NativeBridgeIsSupported(libpath);
-}
-
-struct native_bridge_namespace_t* NativeBridgeGetExportedNamespace(const char* name) {
-  return TO_BRIDGED_NAMESPACE(mock->mock_get_exported_namespace(true, name));
-}
-
-struct native_bridge_namespace_t* NativeBridgeCreateNamespace(
-    const char* name, const char* ld_library_path, const char* default_library_path, uint64_t type,
-    const char* permitted_when_isolated_path, struct native_bridge_namespace_t* parent) {
-  return TO_BRIDGED_NAMESPACE(
-      mock->mock_create_namespace(true, name, ld_library_path, default_library_path, type,
-                                  permitted_when_isolated_path, TO_MOCK_NAMESPACE(parent)));
-}
-
-bool NativeBridgeLinkNamespaces(struct native_bridge_namespace_t* from,
-                                struct native_bridge_namespace_t* to, const char* sonames) {
-  return mock->mock_link_namespaces(true, TO_MOCK_NAMESPACE(from), TO_MOCK_NAMESPACE(to), sonames);
-}
-
-void* NativeBridgeLoadLibraryExt(const char* libpath, int flag,
-                                 struct native_bridge_namespace_t* ns) {
-  return mock->mock_dlopen_ext(true, libpath, flag, TO_MOCK_NAMESPACE(ns));
-}
-
-bool NativeBridgeInitialized() {
-  return mock->NativeBridgeInitialized();
-}
-
-bool NativeBridgeInitAnonymousNamespace(const char* public_ns_sonames,
-                                        const char* anon_ns_library_path) {
-  return mock->mock_init_anonymous_namespace(true, public_ns_sonames, anon_ns_library_path);
-}
-
-const char* NativeBridgeGetError() {
-  return mock->NativeBridgeGetError();
-}
-
-bool NativeBridgeIsPathSupported(const char* path) {
-  return mock->NativeBridgeIsPathSupported(path);
-}
-
-}  // extern "C"
-
-// A very simple JNI mock.
-// jstring is a pointer to utf8 char array. We don't need utf16 char here.
-// jobject, jclass, and jmethodID are also a pointer to utf8 char array
-// Only a few JNI methods that are actually used in libnativeloader are mocked.
-JNINativeInterface* CreateJNINativeInterface() {
-  JNINativeInterface* inf = new JNINativeInterface();
-  memset(inf, 0, sizeof(JNINativeInterface));
-
-  inf->GetStringUTFChars = [](JNIEnv*, jstring s, jboolean*) -> const char* {
-    return reinterpret_cast<const char*>(s);
-  };
-
-  inf->ReleaseStringUTFChars = [](JNIEnv*, jstring, const char*) -> void { return; };
-
-  inf->NewStringUTF = [](JNIEnv*, const char* bytes) -> jstring {
-    return reinterpret_cast<jstring>(const_cast<char*>(bytes));
-  };
-
-  inf->FindClass = [](JNIEnv*, const char* name) -> jclass {
-    return reinterpret_cast<jclass>(const_cast<char*>(name));
-  };
-
-  inf->CallObjectMethodV = [](JNIEnv*, jobject obj, jmethodID mid, va_list) -> jobject {
-    if (strcmp("getParent", reinterpret_cast<const char*>(mid)) == 0) {
-      // JniObject_getParent can be a valid jobject or nullptr if there is
-      // no parent classloader.
-      const char* ret = mock->JniObject_getParent(reinterpret_cast<const char*>(obj));
-      return reinterpret_cast<jobject>(const_cast<char*>(ret));
-    }
-    return nullptr;
-  };
-
-  inf->GetMethodID = [](JNIEnv*, jclass, const char* name, const char*) -> jmethodID {
-    return reinterpret_cast<jmethodID>(const_cast<char*>(name));
-  };
-
-  inf->NewWeakGlobalRef = [](JNIEnv*, jobject obj) -> jobject { return obj; };
-
-  inf->IsSameObject = [](JNIEnv*, jobject a, jobject b) -> jboolean {
-    return strcmp(reinterpret_cast<const char*>(a), reinterpret_cast<const char*>(b)) == 0;
-  };
-
-  return inf;
-}
-
-static void* const any_nonnull = reinterpret_cast<void*>(0x12345678);
-
-// Custom matcher for comparing namespace handles
-MATCHER_P(NsEq, other, "") {
-  *result_listener << "comparing " << reinterpret_cast<const char*>(arg) << " and " << other;
-  return strcmp(reinterpret_cast<const char*>(arg), reinterpret_cast<const char*>(other)) == 0;
-}
-
-/////////////////////////////////////////////////////////////////
-
-// Test fixture
-class NativeLoaderTest : public ::testing::TestWithParam<bool> {
- protected:
-  bool IsBridged() { return GetParam(); }
-
-  void SetUp() override {
-    mock = std::make_unique<NiceMock<MockPlatform>>(IsBridged());
-
-    env = std::make_unique<JNIEnv>();
-    env->functions = CreateJNINativeInterface();
-  }
-
-  void SetExpectations() {
-    std::vector<std::string> default_public_libs =
-        android::base::Split(default_public_libraries(), ":");
-    for (auto l : default_public_libs) {
-      EXPECT_CALL(*mock, dlopen(StrEq(l.c_str()), RTLD_NOW | RTLD_NODELETE))
-          .WillOnce(Return(any_nonnull));
-    }
-  }
-
-  void RunTest() { InitializeNativeLoader(); }
-
-  void TearDown() override {
-    ResetNativeLoader();
-    delete env->functions;
-    mock.reset();
-  }
-
-  std::unique_ptr<JNIEnv> env;
-};
-
-/////////////////////////////////////////////////////////////////
-
-TEST_P(NativeLoaderTest, InitializeLoadsDefaultPublicLibraries) {
-  SetExpectations();
-  RunTest();
-}
-
-INSTANTIATE_TEST_SUITE_P(NativeLoaderTests, NativeLoaderTest, testing::Bool());
-
-/////////////////////////////////////////////////////////////////
-
-class NativeLoaderTest_Create : public NativeLoaderTest {
- protected:
-  // Test inputs (initialized to the default values). Overriding these
-  // must be done before calling SetExpectations() and RunTest().
-  uint32_t target_sdk_version = 29;
-  std::string class_loader = "my_classloader";
-  bool is_shared = false;
-  std::string dex_path = "/data/app/foo/classes.dex";
-  std::string library_path = "/data/app/foo/lib/arm";
-  std::string permitted_path = "/data/app/foo/lib";
-
-  // expected output (.. for the default test inputs)
-  std::string expected_namespace_name = "classloader-namespace";
-  uint64_t expected_namespace_flags = ANDROID_NAMESPACE_TYPE_ISOLATED;
-  std::string expected_library_path = library_path;
-  std::string expected_permitted_path = std::string("/data:/mnt/expand:") + permitted_path;
-  std::string expected_parent_namespace = "platform";
-  bool expected_link_with_platform_ns = true;
-  bool expected_link_with_runtime_ns = true;
-  bool expected_link_with_sphal_ns = !vendor_public_libraries().empty();
-  bool expected_link_with_vndk_ns = false;
-  bool expected_link_with_default_ns = false;
-  bool expected_link_with_neuralnetworks_ns = true;
-  std::string expected_shared_libs_to_platform_ns = default_public_libraries();
-  std::string expected_shared_libs_to_runtime_ns = runtime_public_libraries();
-  std::string expected_shared_libs_to_sphal_ns = vendor_public_libraries();
-  std::string expected_shared_libs_to_vndk_ns = vndksp_libraries();
-  std::string expected_shared_libs_to_default_ns = default_public_libraries();
-  std::string expected_shared_libs_to_neuralnetworks_ns = neuralnetworks_public_libraries();
-
-  void SetExpectations() {
-    NativeLoaderTest::SetExpectations();
-
-    ON_CALL(*mock, JniObject_getParent(StrEq(class_loader))).WillByDefault(Return(nullptr));
-
-    EXPECT_CALL(*mock, NativeBridgeIsPathSupported(_)).Times(AnyNumber());
-    EXPECT_CALL(*mock, NativeBridgeInitialized()).Times(AnyNumber());
-
-    if (IsBridged()) {
-      EXPECT_CALL(*mock,
-                  mock_init_anonymous_namespace(false, StrEq(default_public_libraries()), nullptr))
-          .WillOnce(Return(true));
-
-      EXPECT_CALL(*mock, NativeBridgeInitialized()).WillOnce(Return(true));
-    }
-
-    EXPECT_CALL(*mock, mock_init_anonymous_namespace(
-                           Eq(IsBridged()), StrEq(default_public_libraries()), StrEq(library_path)))
-        .WillOnce(Return(true));
-    EXPECT_CALL(*mock, mock_create_namespace(
-                           Eq(IsBridged()), StrEq(expected_namespace_name), nullptr,
-                           StrEq(expected_library_path), expected_namespace_flags,
-                           StrEq(expected_permitted_path), NsEq(expected_parent_namespace.c_str())))
-        .WillOnce(Return(TO_MOCK_NAMESPACE(TO_ANDROID_NAMESPACE(dex_path.c_str()))));
-    if (expected_link_with_platform_ns) {
-      EXPECT_CALL(*mock, mock_link_namespaces(Eq(IsBridged()), _, NsEq("platform"),
-                                              StrEq(expected_shared_libs_to_platform_ns)))
-          .WillOnce(Return(true));
-    }
-    if (expected_link_with_runtime_ns) {
-      EXPECT_CALL(*mock, mock_link_namespaces(Eq(IsBridged()), _, NsEq("runtime"),
-                                              StrEq(expected_shared_libs_to_runtime_ns)))
-          .WillOnce(Return(true));
-    }
-    if (expected_link_with_sphal_ns) {
-      EXPECT_CALL(*mock, mock_link_namespaces(Eq(IsBridged()), _, NsEq("sphal"),
-                                              StrEq(expected_shared_libs_to_sphal_ns)))
-          .WillOnce(Return(true));
-    }
-    if (expected_link_with_vndk_ns) {
-      EXPECT_CALL(*mock, mock_link_namespaces(Eq(IsBridged()), _, NsEq("vndk"),
-                                              StrEq(expected_shared_libs_to_vndk_ns)))
-          .WillOnce(Return(true));
-    }
-    if (expected_link_with_default_ns) {
-      EXPECT_CALL(*mock, mock_link_namespaces(Eq(IsBridged()), _, NsEq("default"),
-                                              StrEq(expected_shared_libs_to_default_ns)))
-          .WillOnce(Return(true));
-    }
-    if (expected_link_with_neuralnetworks_ns) {
-      EXPECT_CALL(*mock, mock_link_namespaces(Eq(IsBridged()), _, NsEq("neuralnetworks"),
-                                              StrEq(expected_shared_libs_to_neuralnetworks_ns)))
-          .WillOnce(Return(true));
-    }
-  }
-
-  void RunTest() {
-    NativeLoaderTest::RunTest();
-
-    jstring err = CreateClassLoaderNamespace(
-        env(), target_sdk_version, env()->NewStringUTF(class_loader.c_str()), is_shared,
-        env()->NewStringUTF(dex_path.c_str()), env()->NewStringUTF(library_path.c_str()),
-        env()->NewStringUTF(permitted_path.c_str()));
-
-    // no error
-    EXPECT_EQ(err, nullptr);
-
-    if (!IsBridged()) {
-      struct android_namespace_t* ns =
-          FindNamespaceByClassLoader(env(), env()->NewStringUTF(class_loader.c_str()));
-
-      // The created namespace is for this apk
-      EXPECT_EQ(dex_path.c_str(), reinterpret_cast<const char*>(ns));
-    } else {
-      struct NativeLoaderNamespace* ns =
-          FindNativeLoaderNamespaceByClassLoader(env(), env()->NewStringUTF(class_loader.c_str()));
-
-      // The created namespace is for the this apk
-      EXPECT_STREQ(dex_path.c_str(),
-                   reinterpret_cast<const char*>(ns->ToRawNativeBridgeNamespace()));
-    }
-  }
-
-  JNIEnv* env() { return NativeLoaderTest::env.get(); }
-};
-
-TEST_P(NativeLoaderTest_Create, DownloadedApp) {
-  SetExpectations();
-  RunTest();
-}
-
-TEST_P(NativeLoaderTest_Create, BundledSystemApp) {
-  dex_path = "/system/app/foo/foo.apk";
-  is_shared = true;
-
-  expected_namespace_flags = ANDROID_NAMESPACE_TYPE_ISOLATED | ANDROID_NAMESPACE_TYPE_SHARED;
-  SetExpectations();
-  RunTest();
-}
-
-TEST_P(NativeLoaderTest_Create, BundledVendorApp) {
-  dex_path = "/vendor/app/foo/foo.apk";
-  is_shared = true;
-
-  expected_namespace_flags = ANDROID_NAMESPACE_TYPE_ISOLATED | ANDROID_NAMESPACE_TYPE_SHARED;
-  SetExpectations();
-  RunTest();
-}
-
-TEST_P(NativeLoaderTest_Create, UnbundledVendorApp) {
-  dex_path = "/vendor/app/foo/foo.apk";
-  is_shared = false;
-
-  expected_namespace_name = "vendor-classloader-namespace";
-  expected_library_path = expected_library_path + ":/vendor/lib";
-  expected_permitted_path = expected_permitted_path + ":/vendor/lib";
-  expected_shared_libs_to_platform_ns =
-      expected_shared_libs_to_platform_ns + ":" + llndk_libraries();
-  expected_link_with_vndk_ns = true;
-  SetExpectations();
-  RunTest();
-}
-
-TEST_P(NativeLoaderTest_Create, BundledProductApp_pre30) {
-  dex_path = "/product/app/foo/foo.apk";
-  is_shared = true;
-
-  expected_namespace_flags = ANDROID_NAMESPACE_TYPE_ISOLATED | ANDROID_NAMESPACE_TYPE_SHARED;
-  SetExpectations();
-  RunTest();
-}
-
-TEST_P(NativeLoaderTest_Create, BundledProductApp_post30) {
-  dex_path = "/product/app/foo/foo.apk";
-  is_shared = true;
-  target_sdk_version = 30;
-
-  expected_namespace_flags = ANDROID_NAMESPACE_TYPE_ISOLATED | ANDROID_NAMESPACE_TYPE_SHARED;
-  SetExpectations();
-  RunTest();
-}
-
-TEST_P(NativeLoaderTest_Create, UnbundledProductApp_pre30) {
-  dex_path = "/product/app/foo/foo.apk";
-  is_shared = false;
-  SetExpectations();
-  RunTest();
-}
-
-TEST_P(NativeLoaderTest_Create, UnbundledProductApp_post30) {
-  dex_path = "/product/app/foo/foo.apk";
-  is_shared = false;
-  target_sdk_version = 30;
-
-  expected_namespace_name = "vendor-classloader-namespace";
-  expected_library_path = expected_library_path + ":/product/lib:/system/product/lib";
-  expected_permitted_path = expected_permitted_path + ":/product/lib:/system/product/lib";
-  expected_shared_libs_to_platform_ns =
-      expected_shared_libs_to_platform_ns + ":" + llndk_libraries();
-  expected_link_with_vndk_ns = true;
-  SetExpectations();
-  RunTest();
-}
-
-TEST_P(NativeLoaderTest_Create, TwoApks) {
-  SetExpectations();
-  const uint32_t second_app_target_sdk_version = 29;
-  const std::string second_app_class_loader = "second_app_classloader";
-  const bool second_app_is_shared = false;
-  const std::string second_app_dex_path = "/data/app/bar/classes.dex";
-  const std::string second_app_library_path = "/data/app/bar/lib/arm";
-  const std::string second_app_permitted_path = "/data/app/bar/lib";
-  const std::string expected_second_app_permitted_path =
-      std::string("/data:/mnt/expand:") + second_app_permitted_path;
-  const std::string expected_second_app_parent_namespace = "classloader-namespace";
-
-  // The scenario is that second app is loaded by the first app.
-  // So the first app's classloader (`classloader`) is parent of the second
-  // app's classloader.
-  ON_CALL(*mock, JniObject_getParent(StrEq(second_app_class_loader)))
-      .WillByDefault(Return(class_loader.c_str()));
-
-  // namespace for the second app is created. Its parent is set to the namespace
-  // of the first app.
-  EXPECT_CALL(*mock, mock_create_namespace(Eq(IsBridged()), StrEq(expected_namespace_name), nullptr,
-                                           StrEq(second_app_library_path), expected_namespace_flags,
-                                           StrEq(expected_second_app_permitted_path),
-                                           NsEq(dex_path.c_str())))
-      .WillOnce(Return(TO_MOCK_NAMESPACE(TO_ANDROID_NAMESPACE(second_app_dex_path.c_str()))));
-  EXPECT_CALL(*mock, mock_link_namespaces(Eq(IsBridged()), NsEq(second_app_dex_path.c_str()), _, _))
-      .WillRepeatedly(Return(true));
-
-  RunTest();
-  jstring err = CreateClassLoaderNamespace(
-      env(), second_app_target_sdk_version, env()->NewStringUTF(second_app_class_loader.c_str()),
-      second_app_is_shared, env()->NewStringUTF(second_app_dex_path.c_str()),
-      env()->NewStringUTF(second_app_library_path.c_str()),
-      env()->NewStringUTF(second_app_permitted_path.c_str()));
-
-  // success
-  EXPECT_EQ(err, nullptr);
-
-  if (!IsBridged()) {
-    struct android_namespace_t* ns =
-        FindNamespaceByClassLoader(env(), env()->NewStringUTF(second_app_class_loader.c_str()));
-
-    // The created namespace is for the second apk
-    EXPECT_EQ(second_app_dex_path.c_str(), reinterpret_cast<const char*>(ns));
-  } else {
-    struct NativeLoaderNamespace* ns = FindNativeLoaderNamespaceByClassLoader(
-        env(), env()->NewStringUTF(second_app_class_loader.c_str()));
-
-    // The created namespace is for the second apk
-    EXPECT_STREQ(second_app_dex_path.c_str(),
-                 reinterpret_cast<const char*>(ns->ToRawNativeBridgeNamespace()));
-  }
-}
-
-INSTANTIATE_TEST_SUITE_P(NativeLoaderTests_Create, NativeLoaderTest_Create, testing::Bool());
-
-// TODO(b/130388701#comment22) add a test for anonymous namespace
-
-}  // namespace nativeloader
-}  // namespace android
diff --git a/libnativeloader/public_libraries.cpp b/libnativeloader/public_libraries.cpp
deleted file mode 100644
index 6cee668..0000000
--- a/libnativeloader/public_libraries.cpp
+++ /dev/null
@@ -1,328 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "nativeloader"
-
-#include "public_libraries.h"
-
-#include <dirent.h>
-
-#include <algorithm>
-#include <memory>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/properties.h>
-#include <android-base/result.h>
-#include <android-base/strings.h>
-#include <log/log.h>
-
-#include "utils.h"
-
-namespace android::nativeloader {
-
-using namespace std::string_literals;
-using android::base::ErrnoError;
-using android::base::Errorf;
-using android::base::Result;
-
-namespace {
-
-constexpr const char* kDefaultPublicLibrariesFile = "/etc/public.libraries.txt";
-constexpr const char* kExtendedPublicLibrariesFilePrefix = "public.libraries-";
-constexpr const char* kExtendedPublicLibrariesFileSuffix = ".txt";
-constexpr const char* kVendorPublicLibrariesFile = "/vendor/etc/public.libraries.txt";
-constexpr const char* kLlndkLibrariesFile = "/system/etc/llndk.libraries.txt";
-constexpr const char* kVndkLibrariesFile = "/system/etc/vndksp.libraries.txt";
-
-const std::vector<const std::string> kRuntimePublicLibraries = {
-    "libicuuc.so",
-    "libicui18n.so",
-};
-
-constexpr const char* kRuntimeApexLibPath = "/apex/com.android.runtime/" LIB;
-
-constexpr const char* kNeuralNetworksApexPublicLibrary = "libneuralnetworks.so";
-
-// TODO(b/130388701): do we need this?
-std::string root_dir() {
-  static const char* android_root_env = getenv("ANDROID_ROOT");
-  return android_root_env != nullptr ? android_root_env : "/system";
-}
-
-bool debuggable() {
-  static bool debuggable = android::base::GetBoolProperty("ro.debuggable", false);
-  return debuggable;
-}
-
-std::string vndk_version_str() {
-  static std::string version = android::base::GetProperty("ro.vndk.version", "");
-  if (version != "" && version != "current") {
-    return "." + version;
-  }
-  return "";
-}
-
-// For debuggable platform builds use ANDROID_ADDITIONAL_PUBLIC_LIBRARIES environment
-// variable to add libraries to the list. This is intended for platform tests only.
-std::string additional_public_libraries() {
-  if (debuggable()) {
-    const char* val = getenv("ANDROID_ADDITIONAL_PUBLIC_LIBRARIES");
-    return val ? val : "";
-  }
-  return "";
-}
-
-void InsertVndkVersionStr(std::string* file_name) {
-  CHECK(file_name != nullptr);
-  size_t insert_pos = file_name->find_last_of(".");
-  if (insert_pos == std::string::npos) {
-    insert_pos = file_name->length();
-  }
-  file_name->insert(insert_pos, vndk_version_str());
-}
-
-const std::function<Result<void>(const std::string&)> always_true =
-    [](const std::string&) -> Result<void> { return {}; };
-
-Result<std::vector<std::string>> ReadConfig(
-    const std::string& configFile,
-    const std::function<Result<void>(const std::string& /* soname */)>& check_soname) {
-  // Read list of public native libraries from the config file.
-  std::string file_content;
-  if (!base::ReadFileToString(configFile, &file_content)) {
-    return ErrnoError();
-  }
-
-  std::vector<std::string> lines = base::Split(file_content, "\n");
-
-  std::vector<std::string> sonames;
-  for (auto& line : lines) {
-    auto trimmed_line = base::Trim(line);
-    if (trimmed_line[0] == '#' || trimmed_line.empty()) {
-      continue;
-    }
-    size_t space_pos = trimmed_line.rfind(' ');
-    if (space_pos != std::string::npos) {
-      std::string type = trimmed_line.substr(space_pos + 1);
-      if (type != "32" && type != "64") {
-        return Errorf("Malformed line: {}", line);
-      }
-#if defined(__LP64__)
-      // Skip 32 bit public library.
-      if (type == "32") {
-        continue;
-      }
-#else
-      // Skip 64 bit public library.
-      if (type == "64") {
-        continue;
-      }
-#endif
-      trimmed_line.resize(space_pos);
-    }
-
-    auto ret = check_soname(trimmed_line);
-    if (!ret) {
-      return ret.error();
-    }
-    sonames.push_back(trimmed_line);
-  }
-  return sonames;
-}
-
-void ReadExtensionLibraries(const char* dirname, std::vector<std::string>* sonames) {
-  std::unique_ptr<DIR, decltype(&closedir)> dir(opendir(dirname), closedir);
-  if (dir != nullptr) {
-    // Failing to opening the dir is not an error, which can happen in
-    // webview_zygote.
-    while (struct dirent* ent = readdir(dir.get())) {
-      if (ent->d_type != DT_REG && ent->d_type != DT_LNK) {
-        continue;
-      }
-      const std::string filename(ent->d_name);
-      std::string_view fn = filename;
-      if (android::base::ConsumePrefix(&fn, kExtendedPublicLibrariesFilePrefix) &&
-          android::base::ConsumeSuffix(&fn, kExtendedPublicLibrariesFileSuffix)) {
-        const std::string company_name(fn);
-        const std::string config_file_path = dirname + "/"s + filename;
-        LOG_ALWAYS_FATAL_IF(
-            company_name.empty(),
-            "Error extracting company name from public native library list file path \"%s\"",
-            config_file_path.c_str());
-
-        auto ret = ReadConfig(
-            config_file_path, [&company_name](const std::string& soname) -> Result<void> {
-              if (android::base::StartsWith(soname, "lib") &&
-                  android::base::EndsWith(soname, "." + company_name + ".so")) {
-                return {};
-              } else {
-                return Errorf("Library name \"{}\" does not end with the company name {}.", soname,
-                              company_name);
-              }
-            });
-        if (ret) {
-          sonames->insert(sonames->end(), ret->begin(), ret->end());
-        } else {
-          LOG_ALWAYS_FATAL("Error reading public native library list from \"%s\": %s",
-                           config_file_path.c_str(), ret.error().message().c_str());
-        }
-      }
-    }
-  }
-}
-
-static std::string InitDefaultPublicLibraries() {
-  std::string config_file = root_dir() + kDefaultPublicLibrariesFile;
-  auto sonames = ReadConfig(config_file, always_true);
-  if (!sonames) {
-    LOG_ALWAYS_FATAL("Error reading public native library list from \"%s\": %s",
-                     config_file.c_str(), sonames.error().message().c_str());
-    return "";
-  }
-
-  std::string additional_libs = additional_public_libraries();
-  if (!additional_libs.empty()) {
-    auto vec = base::Split(additional_libs, ":");
-    std::copy(vec.begin(), vec.end(), std::back_inserter(*sonames));
-  }
-
-  // Remove the public libs in the runtime namespace.
-  // These libs are listed in public.android.txt, but we don't want the rest of android
-  // in default namespace to dlopen the libs.
-  // For example, libicuuc.so is exposed to classloader namespace from runtime namespace.
-  // Unfortunately, it does not have stable C symbols, and default namespace should only use
-  // stable symbols in libandroidicu.so. http://b/120786417
-  for (const std::string& lib_name : kRuntimePublicLibraries) {
-    std::string path(kRuntimeApexLibPath);
-    path.append("/").append(lib_name);
-
-    struct stat s;
-    // Do nothing if the path in /apex does not exist.
-    // Runtime APEX must be mounted since libnativeloader is in the same APEX
-    if (stat(path.c_str(), &s) != 0) {
-      continue;
-    }
-
-    auto it = std::find(sonames->begin(), sonames->end(), lib_name);
-    if (it != sonames->end()) {
-      sonames->erase(it);
-    }
-  }
-
-  // Remove the public libs in the nnapi namespace.
-  auto it = std::find(sonames->begin(), sonames->end(), kNeuralNetworksApexPublicLibrary);
-  if (it != sonames->end()) {
-    sonames->erase(it);
-  }
-  return android::base::Join(*sonames, ':');
-}
-
-static std::string InitRuntimePublicLibraries() {
-  CHECK(sizeof(kRuntimePublicLibraries) > 0);
-  std::string list = android::base::Join(kRuntimePublicLibraries, ":");
-
-  std::string additional_libs = additional_public_libraries();
-  if (!additional_libs.empty()) {
-    list = list + ':' + additional_libs;
-  }
-  return list;
-}
-
-static std::string InitVendorPublicLibraries() {
-  // This file is optional, quietly ignore if the file does not exist.
-  auto sonames = ReadConfig(kVendorPublicLibrariesFile, always_true);
-  if (!sonames) {
-    return "";
-  }
-  return android::base::Join(*sonames, ':');
-}
-
-// read /system/etc/public.libraries-<companyname>.txt and
-// /product/etc/public.libraries-<companyname>.txt which contain partner defined
-// system libs that are exposed to apps. The libs in the txt files must be
-// named as lib<name>.<companyname>.so.
-static std::string InitExtendedPublicLibraries() {
-  std::vector<std::string> sonames;
-  ReadExtensionLibraries("/system/etc", &sonames);
-  ReadExtensionLibraries("/product/etc", &sonames);
-  return android::base::Join(sonames, ':');
-}
-
-static std::string InitLlndkLibraries() {
-  std::string config_file = kLlndkLibrariesFile;
-  InsertVndkVersionStr(&config_file);
-  auto sonames = ReadConfig(config_file, always_true);
-  if (!sonames) {
-    LOG_ALWAYS_FATAL("%s", sonames.error().message().c_str());
-    return "";
-  }
-  return android::base::Join(*sonames, ':');
-}
-
-static std::string InitVndkspLibraries() {
-  std::string config_file = kVndkLibrariesFile;
-  InsertVndkVersionStr(&config_file);
-  auto sonames = ReadConfig(config_file, always_true);
-  if (!sonames) {
-    LOG_ALWAYS_FATAL("%s", sonames.error().message().c_str());
-    return "";
-  }
-  return android::base::Join(*sonames, ':');
-}
-
-static std::string InitNeuralNetworksPublicLibraries() {
-  return kNeuralNetworksApexPublicLibrary;
-}
-
-}  // namespace
-
-const std::string& default_public_libraries() {
-  static std::string list = InitDefaultPublicLibraries();
-  return list;
-}
-
-const std::string& runtime_public_libraries() {
-  static std::string list = InitRuntimePublicLibraries();
-  return list;
-}
-
-const std::string& vendor_public_libraries() {
-  static std::string list = InitVendorPublicLibraries();
-  return list;
-}
-
-const std::string& extended_public_libraries() {
-  static std::string list = InitExtendedPublicLibraries();
-  return list;
-}
-
-const std::string& neuralnetworks_public_libraries() {
-  static std::string list = InitNeuralNetworksPublicLibraries();
-  return list;
-}
-
-const std::string& llndk_libraries() {
-  static std::string list = InitLlndkLibraries();
-  return list;
-}
-
-const std::string& vndksp_libraries() {
-  static std::string list = InitVndkspLibraries();
-  return list;
-}
-
-}  // namespace android::nativeloader
diff --git a/libnativeloader/public_libraries.h b/libnativeloader/public_libraries.h
deleted file mode 100644
index 9bb3366..0000000
--- a/libnativeloader/public_libraries.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#pragma once
-
-#include <string>
-
-namespace android::nativeloader {
-
-// These provide the list of libraries that are available to the namespace for apps.
-// Not all of the libraries are available to apps. Depending on the context,
-// e.g., if it is a vendor app or not, different set of libraries are made available.
-const std::string& default_public_libraries();
-const std::string& runtime_public_libraries();
-const std::string& vendor_public_libraries();
-const std::string& extended_public_libraries();
-const std::string& neuralnetworks_public_libraries();
-const std::string& llndk_libraries();
-const std::string& vndksp_libraries();
-
-};  // namespace android::nativeloader
diff --git a/libnativeloader/test/Android.bp b/libnativeloader/test/Android.bp
deleted file mode 100644
index 4d5c53d..0000000
--- a/libnativeloader/test/Android.bp
+++ /dev/null
@@ -1,82 +0,0 @@
-//
-// Copyright (C) 2017 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-cc_library {
-    name: "libfoo.oem1",
-    srcs: ["test.cpp"],
-    cflags: ["-DLIBNAME=\"libfoo.oem1.so\""],
-    shared_libs: [
-        "libbase",
-    ],
-}
-
-cc_library {
-    name: "libbar.oem1",
-    srcs: ["test.cpp"],
-    cflags: ["-DLIBNAME=\"libbar.oem1.so\""],
-    shared_libs: [
-        "libbase",
-    ],
-}
-
-cc_library {
-    name: "libfoo.oem2",
-    srcs: ["test.cpp"],
-    cflags: ["-DLIBNAME=\"libfoo.oem2.so\""],
-    shared_libs: [
-        "libbase",
-    ],
-}
-
-cc_library {
-    name: "libbar.oem2",
-    srcs: ["test.cpp"],
-    cflags: ["-DLIBNAME=\"libbar.oem2.so\""],
-    shared_libs: [
-        "libbase",
-    ],
-}
-
-cc_library {
-    name: "libfoo.product1",
-    srcs: ["test.cpp"],
-    cflags: ["-DLIBNAME=\"libfoo.product1.so\""],
-    product_specific: true,
-    shared_libs: [
-        "libbase",
-    ],
-}
-
-cc_library {
-    name: "libbar.product1",
-    srcs: ["test.cpp"],
-    cflags: ["-DLIBNAME=\"libbar.product1.so\""],
-    product_specific: true,
-    shared_libs: [
-        "libbase",
-    ],
-}
-
-// Build the test for the C API.
-cc_test {
-    name: "libnativeloader-api-tests",
-    host_supported: true,
-    test_per_src: true,
-    srcs: [
-        "api_test.c",
-    ],
-    header_libs: ["libnativeloader-headers"],
-}
diff --git a/libnativeloader/test/Android.mk b/libnativeloader/test/Android.mk
deleted file mode 100644
index 65e7b09..0000000
--- a/libnativeloader/test/Android.mk
+++ /dev/null
@@ -1,57 +0,0 @@
-#
-# Copyright (C) 2017 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-LOCAL_PATH:= $(call my-dir)
-
-include $(CLEAR_VARS)
-LOCAL_MODULE := public.libraries-oem1.txt
-LOCAL_SRC_FILES:= $(LOCAL_MODULE)
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
-include $(BUILD_PREBUILT)
-
-include $(CLEAR_VARS)
-LOCAL_MODULE := public.libraries-oem2.txt
-LOCAL_SRC_FILES:= $(LOCAL_MODULE)
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
-include $(BUILD_PREBUILT)
-
-include $(CLEAR_VARS)
-LOCAL_MODULE := public.libraries-product1.txt
-LOCAL_SRC_FILES:= $(LOCAL_MODULE)
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_PRODUCT_ETC)
-include $(BUILD_PREBUILT)
-
-include $(CLEAR_VARS)
-LOCAL_PACKAGE_NAME := oemlibrarytest-system
-LOCAL_MODULE_TAGS := tests
-LOCAL_MANIFEST_FILE := system/AndroidManifest.xml
-LOCAL_SRC_FILES := $(call all-java-files-under, src)
-LOCAL_SDK_VERSION := current
-LOCAL_PROGUARD_ENABLED := disabled
-LOCAL_MODULE_PATH := $(TARGET_OUT_APPS)
-include $(BUILD_PACKAGE)
-
-include $(CLEAR_VARS)
-LOCAL_PACKAGE_NAME := oemlibrarytest-vendor
-LOCAL_MODULE_TAGS := tests
-LOCAL_MANIFEST_FILE := vendor/AndroidManifest.xml
-LOCAL_SRC_FILES := $(call all-java-files-under, src)
-LOCAL_SDK_VERSION := current
-LOCAL_PROGUARD_ENABLED := disabled
-LOCAL_MODULE_PATH := $(TARGET_OUT_VENDOR_APPS)
-include $(BUILD_PACKAGE)
diff --git a/libnativeloader/test/public.libraries-oem1.txt b/libnativeloader/test/public.libraries-oem1.txt
deleted file mode 100644
index f9433e2..0000000
--- a/libnativeloader/test/public.libraries-oem1.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-libfoo.oem1.so
-libbar.oem1.so
diff --git a/libnativeloader/test/public.libraries-oem2.txt b/libnativeloader/test/public.libraries-oem2.txt
deleted file mode 100644
index de6bdb0..0000000
--- a/libnativeloader/test/public.libraries-oem2.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-libfoo.oem2.so
-libbar.oem2.so
diff --git a/libnativeloader/test/public.libraries-product1.txt b/libnativeloader/test/public.libraries-product1.txt
deleted file mode 100644
index 358154c..0000000
--- a/libnativeloader/test/public.libraries-product1.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-libfoo.product1.so
-libbar.product1.so
diff --git a/libnativeloader/test/runtest.sh b/libnativeloader/test/runtest.sh
deleted file mode 100755
index 40beb5b..0000000
--- a/libnativeloader/test/runtest.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/bash
-adb root
-adb remount
-adb sync
-adb shell stop
-adb shell start
-sleep 5 # wait until device reboots
-adb logcat -c;
-adb shell am start -n android.test.app.system/android.test.app.TestActivity
-adb shell am start -n android.test.app.vendor/android.test.app.TestActivity
-adb logcat | grep android.test.app
diff --git a/libnativeloader/test/src/android/test/app/TestActivity.java b/libnativeloader/test/src/android/test/app/TestActivity.java
deleted file mode 100644
index a7a455d..0000000
--- a/libnativeloader/test/src/android/test/app/TestActivity.java
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.test.app;
-
-import android.app.Activity;
-import android.os.Bundle;
-import android.util.Log;
-
-public class TestActivity extends Activity {
-
-    @Override
-    public void onCreate(Bundle icicle) {
-         super.onCreate(icicle);
-         tryLoadingLib("foo.oem1");
-         tryLoadingLib("bar.oem1");
-         tryLoadingLib("foo.oem2");
-         tryLoadingLib("bar.oem2");
-         tryLoadingLib("foo.product1");
-         tryLoadingLib("bar.product1");
-    }
-
-    private void tryLoadingLib(String name) {
-        try {
-            System.loadLibrary(name);
-            Log.d(getPackageName(), "library " + name + " is successfully loaded");
-        } catch (UnsatisfiedLinkError e) {
-            Log.d(getPackageName(), "failed to load libarary " + name, e);
-        }
-    }
-}
diff --git a/libnativeloader/test/system/AndroidManifest.xml b/libnativeloader/test/system/AndroidManifest.xml
deleted file mode 100644
index c304889..0000000
--- a/libnativeloader/test/system/AndroidManifest.xml
+++ /dev/null
@@ -1,31 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- -->
-
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="android.test.app.system">
-
-    <application>
-        <activity android:name="android.test.app.TestActivity" >
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity>
-    </application>
-
-</manifest>
-
diff --git a/libnativeloader/test/test.cpp b/libnativeloader/test/test.cpp
deleted file mode 100644
index b166928..0000000
--- a/libnativeloader/test/test.cpp
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#define LOG_TAG "oemlib"
-#include <android-base/logging.h>
-
-static __attribute__((constructor)) void test_lib_init() {
-  LOG(DEBUG) << LIBNAME << " loaded";
-}
diff --git a/libnativeloader/test/vendor/AndroidManifest.xml b/libnativeloader/test/vendor/AndroidManifest.xml
deleted file mode 100644
index c4c1a9c..0000000
--- a/libnativeloader/test/vendor/AndroidManifest.xml
+++ /dev/null
@@ -1,31 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- -->
-
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="android.test.app.vendor">
-
-    <application>
-        <activity android:name="android.test.app.TestActivity" >
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity>
-    </application>
-
-</manifest>
-
diff --git a/libnetutils/ifc_utils.c b/libnetutils/ifc_utils.c
index a098d59..8212eba 100644
--- a/libnetutils/ifc_utils.c
+++ b/libnetutils/ifc_utils.c
@@ -113,6 +113,10 @@
     if (ret == 0) {
         memcpy(ss, ai->ai_addr, ai->ai_addrlen);
         freeaddrinfo(ai);
+    } else {
+        // Getaddrinfo has its own error codes. Convert to negative errno.
+        // There, the only thing that can reasonably happen is that the passed-in string is invalid.
+        ret = (ret == EAI_SYSTEM) ? -errno : -EINVAL;
     }
 
     return ret;
@@ -263,19 +267,13 @@
     struct {
         struct nlmsghdr n;
         struct ifaddrmsg r;
-        // Allow for IPv6 address, headers, IPv4 broadcast addr and padding.
-        char attrbuf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
-                     NLMSG_ALIGN(sizeof(struct rtattr)) +
-                     NLMSG_ALIGN(INET6_ADDRLEN) +
-                     NLMSG_ALIGN(sizeof(struct rtattr)) +
-                     NLMSG_ALIGN(INET_ADDRLEN)];
+        // Allow for IPv4 or IPv6 address, headers, IPv4 broadcast address and padding.
+        char attrbuf[NLMSG_ALIGN(sizeof(struct rtattr)) + NLMSG_ALIGN(INET6_ADDRLEN) +
+                     NLMSG_ALIGN(sizeof(struct rtattr)) + NLMSG_ALIGN(INET_ADDRLEN)];
     } req;
     struct rtattr *rta;
     struct nlmsghdr *nh;
     struct nlmsgerr *err;
-    char buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
-             NLMSG_ALIGN(sizeof(struct nlmsgerr)) +
-             NLMSG_ALIGN(sizeof(struct nlmsghdr))];
 
     // Get interface ID.
     ifindex = if_nametoindex(name);
@@ -344,6 +342,7 @@
         return -saved_errno;
     }
 
+    char buf[NLMSG_ALIGN(sizeof(struct nlmsgerr)) + sizeof(req)];
     len = recv(s, buf, sizeof(buf), 0);
     saved_errno = errno;
     close(s);
@@ -362,10 +361,12 @@
     return err->error;
 }
 
+// Returns zero on success and negative errno on failure.
 int ifc_add_address(const char *name, const char *address, int prefixlen) {
     return ifc_act_on_address(RTM_NEWADDR, name, address, prefixlen);
 }
 
+// Returns zero on success and negative errno on failure.
 int ifc_del_address(const char *name, const char * address, int prefixlen) {
     return ifc_act_on_address(RTM_DELADDR, name, address, prefixlen);
 }
diff --git a/libpackagelistparser/Android.bp b/libpackagelistparser/Android.bp
index 0740e7d..b56dcdb 100644
--- a/libpackagelistparser/Android.bp
+++ b/libpackagelistparser/Android.bp
@@ -19,4 +19,5 @@
         "libpackagelistparser",
     ],
     test_suites: ["device-tests"],
+    require_root: true,
 }
diff --git a/libpackagelistparser/packagelistparser.cpp b/libpackagelistparser/packagelistparser.cpp
index ddf558b..59c3a74 100644
--- a/libpackagelistparser/packagelistparser.cpp
+++ b/libpackagelistparser/packagelistparser.cpp
@@ -92,10 +92,7 @@
   info->uid = uid;
 
   // Integer to bool conversions.
-  if (debuggable != 0 && debuggable != 1) return false;
   info->debuggable = debuggable;
-
-  if (profileable_from_shell != 0 && profileable_from_shell != 1) return false;
   info->profileable_from_shell = profileable_from_shell;
 
   return true;
diff --git a/libprocessgroup/OWNERS b/libprocessgroup/OWNERS
index bfa730a..27b9a03 100644
--- a/libprocessgroup/OWNERS
+++ b/libprocessgroup/OWNERS
@@ -1,2 +1,3 @@
 ccross@google.com
+surenb@google.com
 tomcherry@google.com
diff --git a/libprocessgroup/include/processgroup/processgroup.h b/libprocessgroup/include/processgroup/processgroup.h
index f73ec2d..0b38b6b 100644
--- a/libprocessgroup/include/processgroup/processgroup.h
+++ b/libprocessgroup/include/processgroup/processgroup.h
@@ -47,11 +47,14 @@
 // Return 0 and removes the cgroup if there are no longer any processes in it.
 // Returns -1 in the case of an error occurring or if there are processes still running
 // even after retrying for up to 200ms.
-int killProcessGroup(uid_t uid, int initialPid, int signal);
+// If max_processes is not nullptr, it returns the maximum number of processes seen in the cgroup
+// during the killing process.  Note that this can be 0 if all processes from the process group have
+// already been terminated.
+int killProcessGroup(uid_t uid, int initialPid, int signal, int* max_processes = nullptr);
 
 // Returns the same as killProcessGroup(), however it does not retry, which means
 // that it only returns 0 in the case that the cgroup exists and it contains no processes.
-int killProcessGroupOnce(uid_t uid, int initialPid, int signal);
+int killProcessGroupOnce(uid_t uid, int initialPid, int signal, int* max_processes = nullptr);
 
 int createProcessGroup(uid_t uid, int initialPid, bool memControl = false);
 
diff --git a/libprocessgroup/include/processgroup/sched_policy.h b/libprocessgroup/include/processgroup/sched_policy.h
index 3c498da..945d90c 100644
--- a/libprocessgroup/include/processgroup/sched_policy.h
+++ b/libprocessgroup/include/processgroup/sched_policy.h
@@ -70,11 +70,22 @@
 extern int get_sched_policy(int tid, SchedPolicy* policy);
 
 /* Return a displayable string corresponding to policy.
- * Return value: non-NULL NUL-terminated name of unspecified length;
+ * Return value: NUL-terminated name of unspecified length, nullptr if invalid;
  * the caller is responsible for displaying the useful part of the string.
  */
 extern const char* get_sched_policy_name(SchedPolicy policy);
 
+/* Return the aggregated task profile name corresponding to cpuset policy.
+ * Return value: NUL-terminated name of unspecified length, nullptr if invalid;
+ * the caller could use it to call SetTaskProfiles.
+ */
+extern const char* get_cpuset_policy_profile_name(SchedPolicy policy);
+
+/* Return the aggregated task profile name corresponding to sched policy.
+ * Return value: NUL-terminated name of unspecified length, nullptr if invalid;
+ * the caller could use it to call SetTaskProfiles.
+ */
+extern const char* get_sched_policy_profile_name(SchedPolicy policy);
 #ifdef __cplusplus
 }
 #endif
diff --git a/libprocessgroup/processgroup.cpp b/libprocessgroup/processgroup.cpp
index 7c191be..6272664 100644
--- a/libprocessgroup/processgroup.cpp
+++ b/libprocessgroup/processgroup.cpp
@@ -117,43 +117,11 @@
 
 bool SetProcessProfiles(uid_t uid, pid_t pid, const std::vector<std::string>& profiles,
                         bool use_fd_cache) {
-    const TaskProfiles& tp = TaskProfiles::GetInstance();
-
-    for (const auto& name : profiles) {
-        TaskProfile* profile = tp.GetProfile(name);
-        if (profile != nullptr) {
-            if (use_fd_cache) {
-                profile->EnableResourceCaching();
-            }
-            if (!profile->ExecuteForProcess(uid, pid)) {
-                PLOG(WARNING) << "Failed to apply " << name << " process profile";
-            }
-        } else {
-            PLOG(WARNING) << "Failed to find " << name << "process profile";
-        }
-    }
-
-    return true;
+    return TaskProfiles::GetInstance().SetProcessProfiles(uid, pid, profiles, use_fd_cache);
 }
 
 bool SetTaskProfiles(int tid, const std::vector<std::string>& profiles, bool use_fd_cache) {
-    const TaskProfiles& tp = TaskProfiles::GetInstance();
-
-    for (const auto& name : profiles) {
-        TaskProfile* profile = tp.GetProfile(name);
-        if (profile != nullptr) {
-            if (use_fd_cache) {
-                profile->EnableResourceCaching();
-            }
-            if (!profile->ExecuteForTask(tid)) {
-                PLOG(WARNING) << "Failed to apply " << name << " task profile";
-            }
-        } else {
-            PLOG(WARNING) << "Failed to find " << name << "task profile";
-        }
-    }
-
-    return true;
+    return TaskProfiles::GetInstance().SetTaskProfiles(tid, profiles, use_fd_cache);
 }
 
 static std::string ConvertUidToPath(const char* cgroup, uid_t uid) {
@@ -333,7 +301,8 @@
     return feof(fd.get()) ? processes : -1;
 }
 
-static int KillProcessGroup(uid_t uid, int initialPid, int signal, int retries) {
+static int KillProcessGroup(uid_t uid, int initialPid, int signal, int retries,
+                            int* max_processes) {
     std::string cpuacct_path;
     std::string memory_path;
 
@@ -348,9 +317,16 @@
 
     std::chrono::steady_clock::time_point start = std::chrono::steady_clock::now();
 
+    if (max_processes != nullptr) {
+        *max_processes = 0;
+    }
+
     int retry = retries;
     int processes;
     while ((processes = DoKillProcessGroupOnce(cgroup, uid, initialPid, signal)) > 0) {
+        if (max_processes != nullptr && processes > *max_processes) {
+            *max_processes = processes;
+        }
         LOG(VERBOSE) << "Killed " << processes << " processes for processgroup " << initialPid;
         if (retry > 0) {
             std::this_thread::sleep_for(5ms);
@@ -391,12 +367,12 @@
     }
 }
 
-int killProcessGroup(uid_t uid, int initialPid, int signal) {
-    return KillProcessGroup(uid, initialPid, signal, 40 /*retries*/);
+int killProcessGroup(uid_t uid, int initialPid, int signal, int* max_processes) {
+    return KillProcessGroup(uid, initialPid, signal, 40 /*retries*/, max_processes);
 }
 
-int killProcessGroupOnce(uid_t uid, int initialPid, int signal) {
-    return KillProcessGroup(uid, initialPid, signal, 0 /*retries*/);
+int killProcessGroupOnce(uid_t uid, int initialPid, int signal, int* max_processes) {
+    return KillProcessGroup(uid, initialPid, signal, 0 /*retries*/, max_processes);
 }
 
 int createProcessGroup(uid_t uid, int initialPid, bool memControl) {
diff --git a/libprocessgroup/profiles/cgroups.json b/libprocessgroup/profiles/cgroups.json
index 5871a63..0341902 100644
--- a/libprocessgroup/profiles/cgroups.json
+++ b/libprocessgroup/profiles/cgroups.json
@@ -39,6 +39,13 @@
       "Mode": "0755",
       "UID": "system",
       "GID": "system"
+    },
+    {
+      "Controller": "freezer",
+      "Path": "/dev/freezer",
+      "Mode": "0755",
+      "UID": "system",
+      "GID": "system"
     }
   ],
   "Cgroups2": {
diff --git a/libprocessgroup/profiles/task_profiles.json b/libprocessgroup/profiles/task_profiles.json
index 74a39cd..3f3dbd7 100644
--- a/libprocessgroup/profiles/task_profiles.json
+++ b/libprocessgroup/profiles/task_profiles.json
@@ -15,7 +15,6 @@
       "Controller": "cpuset",
       "File": "top-app/cpus"
     },
-
     {
       "Name": "MemLimit",
       "Controller": "memory",
@@ -68,6 +67,32 @@
       ]
     },
     {
+      "Name": "Frozen",
+      "Actions": [
+        {
+          "Name": "JoinCgroup",
+          "Params":
+          {
+            "Controller": "freezer",
+            "Path": "frozen"
+          }
+        }
+      ]
+    },
+    {
+      "Name": "Unfrozen",
+      "Actions": [
+        {
+          "Name": "JoinCgroup",
+          "Params":
+          {
+            "Controller": "freezer",
+            "Path": ""
+          }
+        }
+      ]
+    },
+    {
       "Name": "NormalPerformance",
       "Actions": [
         {
@@ -494,5 +519,52 @@
         }
       ]
     }
+  ],
+
+  "AggregateProfiles": [
+    {
+      "Name": "SCHED_SP_DEFAULT",
+      "Profiles": [ "TimerSlackNormal" ]
+    },
+    {
+      "Name": "SCHED_SP_BACKGROUND",
+      "Profiles": [ "HighEnergySaving", "LowIoPriority", "TimerSlackHigh" ]
+    },
+    {
+      "Name": "SCHED_SP_FOREGROUND",
+      "Profiles": [ "HighPerformance", "HighIoPriority", "TimerSlackNormal" ]
+    },
+    {
+      "Name": "SCHED_SP_TOP_APP",
+      "Profiles": [ "MaxPerformance", "MaxIoPriority", "TimerSlackNormal" ]
+    },
+    {
+      "Name": "SCHED_SP_RT_APP",
+      "Profiles": [ "RealtimePerformance", "MaxIoPriority", "TimerSlackNormal" ]
+    },
+    {
+      "Name": "CPUSET_SP_DEFAULT",
+      "Profiles": [ "TimerSlackNormal" ]
+    },
+    {
+      "Name": "CPUSET_SP_BACKGROUND",
+      "Profiles": [ "HighEnergySaving", "ProcessCapacityLow", "LowIoPriority", "TimerSlackHigh" ]
+    },
+    {
+      "Name": "CPUSET_SP_FOREGROUND",
+      "Profiles": [ "HighPerformance", "ProcessCapacityHigh", "HighIoPriority", "TimerSlackNormal" ]
+    },
+    {
+      "Name": "CPUSET_SP_TOP_APP",
+      "Profiles": [ "MaxPerformance", "ProcessCapacityMax", "MaxIoPriority", "TimerSlackNormal" ]
+    },
+    {
+      "Name": "CPUSET_SP_SYSTEM",
+      "Profiles": [ "ServiceCapacityLow", "TimerSlackNormal" ]
+    },
+    {
+      "Name": "CPUSET_SP_RESTRICTED",
+      "Profiles": [ "ServiceCapacityRestricted", "TimerSlackNormal" ]
+    }
   ]
 }
diff --git a/libprocessgroup/profiles/task_profiles.proto b/libprocessgroup/profiles/task_profiles.proto
index 578f0d3..1de4395 100644
--- a/libprocessgroup/profiles/task_profiles.proto
+++ b/libprocessgroup/profiles/task_profiles.proto
@@ -18,10 +18,11 @@
 
 package android.profiles;
 
-// Next: 3
+// Next: 4
 message TaskProfiles {
     repeated Attribute attributes = 1 [json_name = "Attributes"];
     repeated Profile profiles = 2 [json_name = "Profiles"];
+    repeated AggregateProfiles aggregateprofiles = 3 [json_name = "AggregateProfiles"];
 }
 
 // Next: 4
@@ -42,3 +43,9 @@
     string name = 1 [json_name = "Name"];
     map<string, string> params = 2 [json_name = "Params"];
 }
+
+// Next: 3
+message AggregateProfiles {
+    string name = 1 [json_name = "Name"];
+    repeated string profiles = 2 [json_name = "Profiles"];
+}
diff --git a/libprocessgroup/profiles/test.cpp b/libprocessgroup/profiles/test.cpp
index bc9aade..b37e3e6 100644
--- a/libprocessgroup/profiles/test.cpp
+++ b/libprocessgroup/profiles/test.cpp
@@ -33,14 +33,14 @@
 }
 
 // Test suite instantiations
-INSTANTIATE_TEST_SUITE_P(, JsonSchemaTest,
+INSTANTIATE_TEST_SUITE_P(Cgroups, JsonSchemaTest,
                          ::testing::Values(MakeTestParam<Cgroups>("/cgroups.json"),
                                            MakeTestParam<Cgroups>("/cgroups.recovery.json"),
                                            MakeTestParam<TaskProfiles>("/task_profiles.json")));
-INSTANTIATE_TEST_SUITE_P(, CgroupsTest,
+INSTANTIATE_TEST_SUITE_P(Cgroups, CgroupsTest,
                          ::testing::Values(MakeTestParam<Cgroups>("/cgroups.json"),
                                            MakeTestParam<Cgroups>("/cgroups.recovery.json")));
-INSTANTIATE_TEST_SUITE_P(, TaskProfilesTest,
+INSTANTIATE_TEST_SUITE_P(TaskProfiles, TaskProfilesTest,
                          ::testing::Values(MakeTestParam<TaskProfiles>("/task_profiles.json")));
 
 }  // namespace profiles
diff --git a/libprocessgroup/sched_policy.cpp b/libprocessgroup/sched_policy.cpp
index 15f8139..16339d3 100644
--- a/libprocessgroup/sched_policy.cpp
+++ b/libprocessgroup/sched_policy.cpp
@@ -46,34 +46,17 @@
 
     switch (policy) {
         case SP_BACKGROUND:
-            return SetTaskProfiles(tid,
-                                   {"HighEnergySaving", "ProcessCapacityLow", "LowIoPriority",
-                                    "TimerSlackHigh"},
-                                   true)
-                           ? 0
-                           : -1;
+            return SetTaskProfiles(tid, {"CPUSET_SP_BACKGROUND"}, true) ? 0 : -1;
         case SP_FOREGROUND:
         case SP_AUDIO_APP:
         case SP_AUDIO_SYS:
-            return SetTaskProfiles(tid,
-                                   {"HighPerformance", "ProcessCapacityHigh", "HighIoPriority",
-                                    "TimerSlackNormal"},
-                                   true)
-                           ? 0
-                           : -1;
+            return SetTaskProfiles(tid, {"CPUSET_SP_FOREGROUND"}, true) ? 0 : -1;
         case SP_TOP_APP:
-            return SetTaskProfiles(tid,
-                                   {"MaxPerformance", "ProcessCapacityMax", "MaxIoPriority",
-                                    "TimerSlackNormal"},
-                                   true)
-                           ? 0
-                           : -1;
+            return SetTaskProfiles(tid, {"CPUSET_SP_TOP_APP"}, true) ? 0 : -1;
         case SP_SYSTEM:
-            return SetTaskProfiles(tid, {"ServiceCapacityLow", "TimerSlackNormal"}, true) ? 0 : -1;
+            return SetTaskProfiles(tid, {"CPUSET_SP_SYSTEM"}, true) ? 0 : -1;
         case SP_RESTRICTED:
-            return SetTaskProfiles(tid, {"ServiceCapacityRestricted", "TimerSlackNormal"}, true)
-                           ? 0
-                           : -1;
+            return SetTaskProfiles(tid, {"CPUSET_SP_RESTRICTED"}, true) ? 0 : -1;
         default:
             break;
     }
@@ -134,17 +117,17 @@
 
     switch (policy) {
         case SP_BACKGROUND:
-            return SetTaskProfiles(tid, {"HighEnergySaving", "TimerSlackHigh"}, true) ? 0 : -1;
+            return SetTaskProfiles(tid, {"SCHED_SP_BACKGROUND"}, true) ? 0 : -1;
         case SP_FOREGROUND:
         case SP_AUDIO_APP:
         case SP_AUDIO_SYS:
-            return SetTaskProfiles(tid, {"HighPerformance", "TimerSlackNormal"}, true) ? 0 : -1;
+            return SetTaskProfiles(tid, {"SCHED_SP_FOREGROUND"}, true) ? 0 : -1;
         case SP_TOP_APP:
-            return SetTaskProfiles(tid, {"MaxPerformance", "TimerSlackNormal"}, true) ? 0 : -1;
+            return SetTaskProfiles(tid, {"SCHED_SP_TOP_APP"}, true) ? 0 : -1;
         case SP_RT_APP:
-            return SetTaskProfiles(tid, {"RealtimePerformance", "TimerSlackNormal"}, true) ? 0 : -1;
+            return SetTaskProfiles(tid, {"SCHED_SP_RT_APP"}, true) ? 0 : -1;
         default:
-            return SetTaskProfiles(tid, {"TimerSlackNormal"}, true) ? 0 : -1;
+            return SetTaskProfiles(tid, {"SCHED_SP_DEFAULT"}, true) ? 0 : -1;
     }
 
     return 0;
@@ -229,7 +212,45 @@
     };
     static_assert(arraysize(kSchedPolicyNames) == SP_CNT, "missing name");
     if (policy < SP_BACKGROUND || policy >= SP_CNT) {
-        return "error";
+        return nullptr;
     }
     return kSchedPolicyNames[policy];
 }
+
+const char* get_cpuset_policy_profile_name(SchedPolicy policy) {
+    /*
+     *  cpuset profile array for:
+     *  SP_DEFAULT(-1), SP_BACKGROUND(0), SP_FOREGROUND(1),
+     *  SP_SYSTEM(2), SP_AUDIO_APP(3), SP_AUDIO_SYS(4),
+     *  SP_TOP_APP(5), SP_RT_APP(6), SP_RESTRICTED(7)
+     *  index is policy + 1
+     *  this need keep in sync with SchedPolicy enum
+     */
+    static constexpr const char* kCpusetProfiles[SP_CNT + 1] = {
+            "CPUSET_SP_DEFAULT", "CPUSET_SP_BACKGROUND", "CPUSET_SP_FOREGROUND",
+            "CPUSET_SP_SYSTEM",  "CPUSET_SP_FOREGROUND", "CPUSET_SP_FOREGROUND",
+            "CPUSET_SP_TOP_APP", "CPUSET_SP_DEFAULT",    "CPUSET_SP_RESTRICTED"};
+    if (policy < SP_DEFAULT || policy >= SP_CNT) {
+        return nullptr;
+    }
+    return kCpusetProfiles[policy + 1];
+}
+
+const char* get_sched_policy_profile_name(SchedPolicy policy) {
+    /*
+     *  sched profile array for:
+     *  SP_DEFAULT(-1), SP_BACKGROUND(0), SP_FOREGROUND(1),
+     *  SP_SYSTEM(2), SP_AUDIO_APP(3), SP_AUDIO_SYS(4),
+     *  SP_TOP_APP(5), SP_RT_APP(6), SP_RESTRICTED(7)
+     *  index is policy + 1
+     *  this need keep in sync with SchedPolicy enum
+     */
+    static constexpr const char* kSchedProfiles[SP_CNT + 1] = {
+            "SCHED_SP_DEFAULT", "SCHED_SP_BACKGROUND", "SCHED_SP_FOREGROUND",
+            "SCHED_SP_DEFAULT", "SCHED_SP_FOREGROUND", "SCHED_SP_FOREGROUND",
+            "SCHED_SP_TOP_APP", "SCHED_SP_RT_APP",     "SCHED_SP_DEFAULT"};
+    if (policy < SP_DEFAULT || policy >= SP_CNT) {
+        return nullptr;
+    }
+    return kSchedProfiles[policy + 1];
+}
diff --git a/libprocessgroup/task_profiles.cpp b/libprocessgroup/task_profiles.cpp
index aee5f0c..9447f86 100644
--- a/libprocessgroup/task_profiles.cpp
+++ b/libprocessgroup/task_profiles.cpp
@@ -268,6 +268,26 @@
     return true;
 }
 
+bool ApplyProfileAction::ExecuteForProcess(uid_t uid, pid_t pid) const {
+    for (const auto& profile : profiles_) {
+        profile->EnableResourceCaching();
+        if (!profile->ExecuteForProcess(uid, pid)) {
+            PLOG(WARNING) << "ExecuteForProcess failed for aggregate profile";
+        }
+    }
+    return true;
+}
+
+bool ApplyProfileAction::ExecuteForTask(int tid) const {
+    for (const auto& profile : profiles_) {
+        profile->EnableResourceCaching();
+        if (!profile->ExecuteForTask(tid)) {
+            PLOG(WARNING) << "ExecuteForTask failed for aggregate profile";
+        }
+    }
+    return true;
+}
+
 bool TaskProfile::ExecuteForProcess(uid_t uid, pid_t pid) const {
     for (const auto& element : elements_) {
         if (!element->ExecuteForProcess(uid, pid)) {
@@ -373,15 +393,13 @@
         }
     }
 
-    std::map<std::string, std::string> params;
-
     const Json::Value& profiles_val = root["Profiles"];
     for (Json::Value::ArrayIndex i = 0; i < profiles_val.size(); ++i) {
         const Json::Value& profile_val = profiles_val[i];
 
         std::string profile_name = profile_val["Name"].asString();
         const Json::Value& actions = profile_val["Actions"];
-        auto profile = std::make_unique<TaskProfile>();
+        auto profile = std::make_shared<TaskProfile>();
 
         for (Json::Value::ArrayIndex act_idx = 0; act_idx < actions.size(); ++act_idx) {
             const Json::Value& action_val = actions[act_idx];
@@ -440,7 +458,38 @@
                 LOG(WARNING) << "Unknown profile action: " << action_name;
             }
         }
-        profiles_[profile_name] = std::move(profile);
+        profiles_[profile_name] = profile;
+    }
+
+    const Json::Value& aggregateprofiles_val = root["AggregateProfiles"];
+    for (Json::Value::ArrayIndex i = 0; i < aggregateprofiles_val.size(); ++i) {
+        const Json::Value& aggregateprofile_val = aggregateprofiles_val[i];
+
+        std::string aggregateprofile_name = aggregateprofile_val["Name"].asString();
+        const Json::Value& aggregateprofiles = aggregateprofile_val["Profiles"];
+        std::vector<std::shared_ptr<TaskProfile>> profiles;
+        bool ret = true;
+
+        for (Json::Value::ArrayIndex pf_idx = 0; pf_idx < aggregateprofiles.size(); ++pf_idx) {
+            std::string profile_name = aggregateprofiles[pf_idx].asString();
+
+            if (profile_name == aggregateprofile_name) {
+                LOG(WARNING) << "AggregateProfiles: recursive profile name: " << profile_name;
+                ret = false;
+                break;
+            } else if (profiles_.find(profile_name) == profiles_.end()) {
+                LOG(WARNING) << "AggregateProfiles: undefined profile name: " << profile_name;
+                ret = false;
+                break;
+            } else {
+                profiles.push_back(profiles_[profile_name]);
+            }
+        }
+        if (ret) {
+            auto profile = std::make_shared<TaskProfile>();
+            profile->Add(std::make_unique<ApplyProfileAction>(profiles));
+            profiles_[aggregateprofile_name] = profile;
+        }
     }
 
     return true;
@@ -463,3 +512,39 @@
     }
     return nullptr;
 }
+
+bool TaskProfiles::SetProcessProfiles(uid_t uid, pid_t pid,
+                                      const std::vector<std::string>& profiles, bool use_fd_cache) {
+    for (const auto& name : profiles) {
+        TaskProfile* profile = GetProfile(name);
+        if (profile != nullptr) {
+            if (use_fd_cache) {
+                profile->EnableResourceCaching();
+            }
+            if (!profile->ExecuteForProcess(uid, pid)) {
+                PLOG(WARNING) << "Failed to apply " << name << " process profile";
+            }
+        } else {
+            PLOG(WARNING) << "Failed to find " << name << "process profile";
+        }
+    }
+    return true;
+}
+
+bool TaskProfiles::SetTaskProfiles(int tid, const std::vector<std::string>& profiles,
+                                   bool use_fd_cache) {
+    for (const auto& name : profiles) {
+        TaskProfile* profile = GetProfile(name);
+        if (profile != nullptr) {
+            if (use_fd_cache) {
+                profile->EnableResourceCaching();
+            }
+            if (!profile->ExecuteForTask(tid)) {
+                PLOG(WARNING) << "Failed to apply " << name << " task profile";
+            }
+        } else {
+            PLOG(WARNING) << "Failed to find " << name << "task profile";
+        }
+    }
+    return true;
+}
diff --git a/libprocessgroup/task_profiles.h b/libprocessgroup/task_profiles.h
index 891d5b5..9f2308c 100644
--- a/libprocessgroup/task_profiles.h
+++ b/libprocessgroup/task_profiles.h
@@ -154,6 +154,19 @@
     std::vector<std::unique_ptr<ProfileAction>> elements_;
 };
 
+// Set aggregate profile element
+class ApplyProfileAction : public ProfileAction {
+  public:
+    ApplyProfileAction(const std::vector<std::shared_ptr<TaskProfile>>& profiles)
+        : profiles_(profiles) {}
+
+    virtual bool ExecuteForProcess(uid_t uid, pid_t pid) const;
+    virtual bool ExecuteForTask(int tid) const;
+
+  private:
+    std::vector<std::shared_ptr<TaskProfile>> profiles_;
+};
+
 class TaskProfiles {
   public:
     // Should be used by all users
@@ -162,9 +175,12 @@
     TaskProfile* GetProfile(const std::string& name) const;
     const ProfileAttribute* GetAttribute(const std::string& name) const;
     void DropResourceCaching() const;
+    bool SetProcessProfiles(uid_t uid, pid_t pid, const std::vector<std::string>& profiles,
+                            bool use_fd_cache);
+    bool SetTaskProfiles(int tid, const std::vector<std::string>& profiles, bool use_fd_cache);
 
   private:
-    std::map<std::string, std::unique_ptr<TaskProfile>> profiles_;
+    std::map<std::string, std::shared_ptr<TaskProfile>> profiles_;
     std::map<std::string, std::unique_ptr<ProfileAttribute>> attributes_;
 
     TaskProfiles();
diff --git a/libprocinfo/Android.bp b/libprocinfo/Android.bp
index 15f03d0..0c9a2b8 100644
--- a/libprocinfo/Android.bp
+++ b/libprocinfo/Android.bp
@@ -34,6 +34,7 @@
     host_supported: true,
     srcs: [
         "process.cpp",
+        "process_map.cpp",
     ],
 
     local_include_dirs: ["include"],
@@ -58,6 +59,7 @@
     name: "libprocinfo_test",
     defaults: ["libprocinfo_defaults"],
     host_supported: true,
+    isolated: true,
     srcs: [
         "process_test.cpp",
         "process_map_test.cpp",
diff --git a/libprocinfo/include/procinfo/process_map.h b/libprocinfo/include/procinfo/process_map.h
index b6ec3cb..569a022 100644
--- a/libprocinfo/include/procinfo/process_map.h
+++ b/libprocinfo/include/procinfo/process_map.h
@@ -176,5 +176,9 @@
                const char* name) { maps->emplace_back(start, end, flags, pgoff, inode, name); });
 }
 
+bool ReadMapFileAsyncSafe(const char* map_file, void* buffer, size_t buffer_size,
+                          const std::function<void(uint64_t, uint64_t, uint16_t, uint64_t, ino_t,
+                                                   const char*)>& callback);
+
 } /* namespace procinfo */
 } /* namespace android */
diff --git a/libprocinfo/process_map.cpp b/libprocinfo/process_map.cpp
new file mode 100644
index 0000000..5e240b9
--- /dev/null
+++ b/libprocinfo/process_map.cpp
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <procinfo/process_map.h>
+
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <procinfo/process.h>
+
+namespace android {
+namespace procinfo {
+
+bool ReadMapFileAsyncSafe(const char* map_file, void* buffer, size_t buffer_size,
+                          const std::function<void(uint64_t, uint64_t, uint16_t, uint64_t, ino_t,
+                                                   const char*)>& callback) {
+  if (buffer == nullptr || buffer_size == 0) {
+    return false;
+  }
+
+  int fd = open(map_file, O_RDONLY | O_CLOEXEC);
+  if (fd == -1) {
+    return false;
+  }
+
+  char* char_buffer = reinterpret_cast<char*>(buffer);
+  size_t start = 0;
+  size_t read_bytes = 0;
+  char* line = nullptr;
+  bool read_complete = false;
+  while (true) {
+    ssize_t bytes =
+        TEMP_FAILURE_RETRY(read(fd, char_buffer + read_bytes, buffer_size - read_bytes - 1));
+    if (bytes <= 0) {
+      if (read_bytes == 0) {
+        close(fd);
+        return bytes == 0;
+      }
+      // Treat the last piece of data as the last line.
+      char_buffer[start + read_bytes] = '\n';
+      bytes = 1;
+      read_complete = true;
+    }
+    read_bytes += bytes;
+
+    while (read_bytes > 0) {
+      char* newline = reinterpret_cast<char*>(memchr(&char_buffer[start], '\n', read_bytes));
+      if (newline == nullptr) {
+        break;
+      }
+      *newline = '\0';
+      line = &char_buffer[start];
+      start = newline - char_buffer + 1;
+      read_bytes -= newline - line + 1;
+
+      // Ignore the return code, errors are okay.
+      ReadMapFileContent(line, callback);
+    }
+
+    if (read_complete) {
+      close(fd);
+      return true;
+    }
+
+    if (start == 0 && read_bytes == buffer_size - 1) {
+      // The buffer provided is too small to contain this line, give up
+      // and indicate failure.
+      close(fd);
+      return false;
+    }
+
+    // Copy any leftover data to the front  of the buffer.
+    if (start > 0) {
+      if (read_bytes > 0) {
+        memmove(char_buffer, &char_buffer[start], read_bytes);
+      }
+      start = 0;
+    }
+  }
+}
+
+} /* namespace procinfo */
+} /* namespace android */
diff --git a/libprocinfo/process_map_test.cpp b/libprocinfo/process_map_test.cpp
index 562d864..b1bdc08 100644
--- a/libprocinfo/process_map_test.cpp
+++ b/libprocinfo/process_map_test.cpp
@@ -16,9 +16,14 @@
 
 #include <procinfo/process_map.h>
 
+#include <inttypes.h>
+#include <sys/mman.h>
+
 #include <string>
+#include <vector>
 
 #include <android-base/file.h>
+#include <android-base/stringprintf.h>
 
 #include <gtest/gtest.h>
 
@@ -63,3 +68,215 @@
   ASSERT_TRUE(android::procinfo::ReadProcessMaps(getpid(), &maps));
   ASSERT_GT(maps.size(), 0u);
 }
+
+extern "C" void malloc_disable();
+extern "C" void malloc_enable();
+
+struct TestMapInfo {
+  TestMapInfo() = default;
+  TestMapInfo(uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, ino_t inode,
+              const char* new_name)
+      : start(start), end(end), flags(flags), pgoff(pgoff), inode(inode) {
+    strcpy(name, new_name);
+  }
+  uint64_t start = 0;
+  uint64_t end = 0;
+  uint16_t flags = 0;
+  uint64_t pgoff = 0;
+  ino_t inode = 0;
+  char name[100] = {};
+};
+
+void VerifyReadMapFileAsyncSafe(const char* maps_data,
+                                const std::vector<TestMapInfo>& expected_info) {
+  TemporaryFile tf;
+  ASSERT_TRUE(android::base::WriteStringToFd(maps_data, tf.fd));
+
+  std::vector<TestMapInfo> saved_info(expected_info.size());
+  size_t num_maps = 0;
+
+  auto callback = [&](uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, ino_t inode,
+                      const char* name) {
+    if (num_maps != saved_info.size()) {
+      TestMapInfo& saved = saved_info[num_maps];
+      saved.start = start;
+      saved.end = end;
+      saved.flags = flags;
+      saved.pgoff = pgoff;
+      saved.inode = inode;
+      strcpy(saved.name, name);
+    }
+    num_maps++;
+  };
+
+  std::vector<char> buffer(64 * 1024);
+
+#if defined(__BIONIC__)
+  // Any allocations will block after this call.
+  malloc_disable();
+#endif
+
+  bool parsed =
+      android::procinfo::ReadMapFileAsyncSafe(tf.path, buffer.data(), buffer.size(), callback);
+
+#if defined(__BIONIC__)
+  malloc_enable();
+#endif
+
+  ASSERT_TRUE(parsed) << "Parsing of data failed:\n" << maps_data;
+  ASSERT_EQ(expected_info.size(), num_maps);
+  for (size_t i = 0; i < expected_info.size(); i++) {
+    const TestMapInfo& expected = expected_info[i];
+    const TestMapInfo& saved = saved_info[i];
+    EXPECT_EQ(expected.start, saved.start);
+    EXPECT_EQ(expected.end, saved.end);
+    EXPECT_EQ(expected.flags, saved.flags);
+    EXPECT_EQ(expected.pgoff, saved.pgoff);
+    EXPECT_EQ(expected.inode, saved.inode);
+    EXPECT_STREQ(expected.name, saved.name);
+  }
+}
+
+TEST(process_map, ReadMapFileAsyncSafe_invalid) {
+  std::vector<TestMapInfo> expected_info;
+
+  VerifyReadMapFileAsyncSafe("12c00000-2ac00000", expected_info);
+}
+
+TEST(process_map, ReadMapFileAsyncSafe_single) {
+  std::vector<TestMapInfo> expected_info;
+  expected_info.emplace_back(0x12c00000, 0x2ac00000, PROT_READ | PROT_WRITE, 0x100, 10267643,
+                             "/lib/fake.so");
+
+  VerifyReadMapFileAsyncSafe("12c00000-2ac00000 rw-p 00000100 00:05 10267643 /lib/fake.so",
+                             expected_info);
+}
+
+TEST(process_map, ReadMapFileAsyncSafe_single_with_newline) {
+  std::vector<TestMapInfo> expected_info;
+  expected_info.emplace_back(0x12c00000, 0x2ac00000, PROT_READ | PROT_WRITE, 0x100, 10267643,
+                             "/lib/fake.so");
+
+  VerifyReadMapFileAsyncSafe("12c00000-2ac00000 rw-p 00000100 00:05 10267643 /lib/fake.so\n",
+                             expected_info);
+}
+
+TEST(process_map, ReadMapFileAsyncSafe_single_no_library) {
+  std::vector<TestMapInfo> expected_info;
+  expected_info.emplace_back(0xa0000, 0xc0000, PROT_READ | PROT_WRITE | PROT_EXEC, 0xb00, 101, "");
+
+  VerifyReadMapFileAsyncSafe("a0000-c0000 rwxp 00000b00 00:05 101", expected_info);
+}
+
+TEST(process_map, ReadMapFileAsyncSafe_multiple) {
+  std::vector<TestMapInfo> expected_info;
+  expected_info.emplace_back(0xa0000, 0xc0000, PROT_READ | PROT_WRITE | PROT_EXEC, 1, 100, "");
+  expected_info.emplace_back(0xd0000, 0xe0000, PROT_READ, 2, 101, "/lib/libsomething1.so");
+  expected_info.emplace_back(0xf0000, 0x100000, PROT_WRITE, 3, 102, "/lib/libsomething2.so");
+  expected_info.emplace_back(0x110000, 0x120000, PROT_EXEC, 4, 103, "[anon:something or another]");
+
+  std::string map_data =
+      "0a0000-0c0000 rwxp 00000001 00:05 100\n"
+      "0d0000-0e0000 r--p 00000002 00:05 101  /lib/libsomething1.so\n"
+      "0f0000-100000 -w-p 00000003 00:05 102  /lib/libsomething2.so\n"
+      "110000-120000 --xp 00000004 00:05 103  [anon:something or another]\n";
+
+  VerifyReadMapFileAsyncSafe(map_data.c_str(), expected_info);
+}
+
+TEST(process_map, ReadMapFileAsyncSafe_multiple_reads) {
+  std::vector<TestMapInfo> expected_info;
+  std::string map_data;
+  uint64_t start = 0xa0000;
+  for (size_t i = 0; i < 10000; i++) {
+    map_data += android::base::StringPrintf("%" PRIx64 "-%" PRIx64 " r--p %zx 01:20 %zu fake.so\n",
+                                            start, start + 0x1000, i, 1000 + i);
+    expected_info.emplace_back(start, start + 0x1000, PROT_READ, i, 1000 + i, "fake.so");
+  }
+
+  VerifyReadMapFileAsyncSafe(map_data.c_str(), expected_info);
+}
+
+TEST(process_map, ReadMapFileAsyncSafe_buffer_nullptr) {
+  size_t num_calls = 0;
+  auto callback = [&](uint64_t, uint64_t, uint16_t, uint64_t, ino_t, const char*) { num_calls++; };
+
+#if defined(__BIONIC__)
+  // Any allocations will block after this call.
+  malloc_disable();
+#endif
+
+  bool parsed = android::procinfo::ReadMapFileAsyncSafe("/proc/self/maps", nullptr, 10, callback);
+
+#if defined(__BIONIC__)
+  malloc_enable();
+#endif
+
+  ASSERT_FALSE(parsed);
+  EXPECT_EQ(0UL, num_calls);
+}
+
+TEST(process_map, ReadMapFileAsyncSafe_buffer_size_zero) {
+  size_t num_calls = 0;
+  auto callback = [&](uint64_t, uint64_t, uint16_t, uint64_t, ino_t, const char*) { num_calls++; };
+
+#if defined(__BIONIC__)
+  // Any allocations will block after this call.
+  malloc_disable();
+#endif
+
+  char buffer[10];
+  bool parsed = android::procinfo::ReadMapFileAsyncSafe("/proc/self/maps", buffer, 0, callback);
+
+#if defined(__BIONIC__)
+  malloc_enable();
+#endif
+
+  ASSERT_FALSE(parsed);
+  EXPECT_EQ(0UL, num_calls);
+}
+
+TEST(process_map, ReadMapFileAsyncSafe_buffer_too_small_no_calls) {
+  size_t num_calls = 0;
+  auto callback = [&](uint64_t, uint64_t, uint16_t, uint64_t, ino_t, const char*) { num_calls++; };
+
+#if defined(__BIONIC__)
+  // Any allocations will block after this call.
+  malloc_disable();
+#endif
+
+  char buffer[10];
+  bool parsed =
+      android::procinfo::ReadMapFileAsyncSafe("/proc/self/maps", buffer, sizeof(buffer), callback);
+
+#if defined(__BIONIC__)
+  malloc_enable();
+#endif
+
+  ASSERT_FALSE(parsed);
+  EXPECT_EQ(0UL, num_calls);
+}
+
+TEST(process_map, ReadMapFileAsyncSafe_buffer_too_small_could_parse) {
+  TemporaryFile tf;
+  ASSERT_TRUE(android::base::WriteStringToFd(
+      "0a0000-0c0000 rwxp 00000001 00:05 100    /fake/lib.so\n", tf.fd));
+
+  size_t num_calls = 0;
+  auto callback = [&](uint64_t, uint64_t, uint16_t, uint64_t, ino_t, const char*) { num_calls++; };
+
+#if defined(__BIONIC__)
+  // Any allocations will block after this call.
+  malloc_disable();
+#endif
+
+  char buffer[39];
+  bool parsed = android::procinfo::ReadMapFileAsyncSafe(tf.path, buffer, sizeof(buffer), callback);
+
+#if defined(__BIONIC__)
+  malloc_enable();
+#endif
+
+  ASSERT_FALSE(parsed);
+  EXPECT_EQ(0UL, num_calls);
+}
diff --git a/libsparse/Android.bp b/libsparse/Android.bp
index 2ec4754..88146e9 100644
--- a/libsparse/Android.bp
+++ b/libsparse/Android.bp
@@ -82,3 +82,15 @@
         },
     },
 }
+
+cc_fuzz {
+    name: "sparse_fuzzer",
+    host_supported: false,
+    srcs: [
+        "sparse_fuzzer.cpp",
+    ],
+    static_libs: [
+        "libsparse",
+        "liblog",
+    ],
+}
diff --git a/libsparse/output_file.cpp b/libsparse/output_file.cpp
index 5b8179f..e35cb0d 100644
--- a/libsparse/output_file.cpp
+++ b/libsparse/output_file.cpp
@@ -17,6 +17,7 @@
 #define _FILE_OFFSET_BITS 64
 #define _LARGEFILE64_SOURCE 1
 
+#include <algorithm>
 #include <fcntl.h>
 #include <inttypes.h>
 #include <limits.h>
@@ -48,13 +49,6 @@
 #define off64_t off_t
 #endif
 
-#define min(a, b)        \
-  ({                     \
-    typeof(a) _a = (a);  \
-    typeof(b) _b = (b);  \
-    (_a < _b) ? _a : _b; \
-  })
-
 #define SPARSE_HEADER_MAJOR_VER 1
 #define SPARSE_HEADER_MINOR_VER 0
 #define SPARSE_HEADER_LEN (sizeof(sparse_header_t))
@@ -231,7 +225,7 @@
   struct output_file_gz* outgz = to_output_file_gz(out);
 
   while (len > 0) {
-    ret = gzwrite(outgz->gz_fd, data, min(len, (unsigned int)INT_MAX));
+    ret = gzwrite(outgz->gz_fd, data, std::min<unsigned int>(len, (unsigned int)INT_MAX));
     if (ret == 0) {
       error("gzwrite %s", gzerror(outgz->gz_fd, nullptr));
       return -1;
@@ -268,7 +262,7 @@
   int ret;
 
   while (off > 0) {
-    to_write = min(off, (int64_t)INT_MAX);
+    to_write = std::min(off, (int64_t)INT_MAX);
     ret = outc->write(outc->priv, nullptr, to_write);
     if (ret < 0) {
       return ret;
@@ -470,7 +464,7 @@
   }
 
   while (len) {
-    write_len = min(len, out->block_size);
+    write_len = std::min(len, out->block_size);
     ret = out->ops->write(out, out->fill_buf, write_len);
     if (ret < 0) {
       return ret;
@@ -499,6 +493,10 @@
 
 void output_file_close(struct output_file* out) {
   out->sparse_ops->write_end_chunk(out);
+  free(out->zero_buf);
+  free(out->fill_buf);
+  out->zero_buf = nullptr;
+  out->fill_buf = nullptr;
   out->ops->close(out);
 }
 
diff --git a/libsparse/sparse_fuzzer.cpp b/libsparse/sparse_fuzzer.cpp
new file mode 100644
index 0000000..42f331f
--- /dev/null
+++ b/libsparse/sparse_fuzzer.cpp
@@ -0,0 +1,16 @@
+#include "include/sparse/sparse.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  if (size < 2 * sizeof(wchar_t)) return 0;
+
+  int64_t blocksize = 4096;
+  struct sparse_file* file = sparse_file_new(size, blocksize);
+  if (!file) {
+    return 0;
+  }
+
+  unsigned int block = 1;
+  sparse_file_add_data(file, &data, size, block);
+  sparse_file_destroy(file);
+  return 0;
+}
diff --git a/libstats/OWNERS b/libstats/OWNERS
index ed06fbc..7855774 100644
--- a/libstats/OWNERS
+++ b/libstats/OWNERS
@@ -1,4 +1,7 @@
-bookatz@google.com
 joeo@google.com
+muhammadq@google.com
+ruchirr@google.com
+singhtejinder@google.com
+tsaichristine@google.com
 yaochen@google.com
-yanglu@google.com
+yro@google.com
diff --git a/libstats/statsd_writer.c b/libstats/statsd_writer.c
index b778f92..073b67f 100644
--- a/libstats/statsd_writer.c
+++ b/libstats/statsd_writer.c
@@ -36,25 +36,6 @@
 #include <time.h>
 #include <unistd.h>
 
-/* branchless on many architectures. */
-#define min(x, y) ((y) ^ (((x) ^ (y)) & -((x) < (y))))
-
-#ifndef htole32
-#if __BYTE_ORDER == __LITTLE_ENDIAN
-#define htole32(x) (x)
-#else
-#define htole32(x) __bswap_32(x)
-#endif
-#endif
-
-#ifndef htole64
-#if __BYTE_ORDER == __LITTLE_ENDIAN
-#define htole64(x) (x)
-#else
-#define htole64(x) __bswap_64(x)
-#endif
-#endif
-
 static pthread_mutex_t log_init_lock = PTHREAD_MUTEX_INITIALIZER;
 static atomic_int dropped = 0;
 static atomic_int log_error = 0;
@@ -109,6 +90,11 @@
         if (sock < 0) {
             ret = -errno;
         } else {
+            int sndbuf = 1 * 1024 * 1024;  // set max send buffer size 1MB
+            socklen_t bufLen = sizeof(sndbuf);
+            // SO_RCVBUF does not have an effect on unix domain socket, but SO_SNDBUF does.
+            // Proceed to connect even setsockopt fails.
+            setsockopt(sock, SOL_SOCKET, SO_SNDBUF, &sndbuf, bufLen);
             struct sockaddr_un un;
             memset(&un, 0, sizeof(struct sockaddr_un));
             un.sun_family = AF_UNIX;
@@ -216,14 +202,14 @@
             android_log_event_long_t buffer;
             header.id = LOG_ID_STATS;
             // store the last log error in the tag field. This tag field is not used by statsd.
-            buffer.header.tag = htole32(atomic_load(&log_error));
+            buffer.header.tag = atomic_load(&log_error);
             buffer.payload.type = EVENT_TYPE_LONG;
             // format:
             // |atom_tag|dropped_count|
             int64_t composed_long = atomic_load(&atom_tag);
             // Send 2 int32's via an int64.
             composed_long = ((composed_long << 32) | ((int64_t)snapshot));
-            buffer.payload.data = htole64(composed_long);
+            buffer.payload.data = composed_long;
 
             newVec[headerLength].iov_base = &buffer;
             newVec[headerLength].iov_len = sizeof(buffer);
diff --git a/libsync/libsync.map.txt b/libsync/libsync.map.txt
index 53bb07a..91c3528 100644
--- a/libsync/libsync.map.txt
+++ b/libsync/libsync.map.txt
@@ -19,10 +19,10 @@
     sync_merge; # introduced=26
     sync_file_info; # introduced=26
     sync_file_info_free; # introduced=26
-    sync_wait; # vndk
-    sync_fence_info; # vndk
-    sync_pt_info; # vndk
-    sync_fence_info_free; # vndk
+    sync_wait; # llndk
+    sync_fence_info; # llndk
+    sync_pt_info; # llndk
+    sync_fence_info_free; # llndk
   local:
     *;
 };
diff --git a/libsystem/include/system/graphics-base-v1.2.h b/libsystem/include/system/graphics-base-v1.2.h
new file mode 100644
index 0000000..2194f5e
--- /dev/null
+++ b/libsystem/include/system/graphics-base-v1.2.h
@@ -0,0 +1,31 @@
+// This file is autogenerated by hidl-gen. Do not edit manually.
+// Source: android.hardware.graphics.common@1.2
+// Location: hardware/interfaces/graphics/common/1.2/
+
+#ifndef HIDL_GENERATED_ANDROID_HARDWARE_GRAPHICS_COMMON_V1_2_EXPORTED_CONSTANTS_H_
+#define HIDL_GENERATED_ANDROID_HARDWARE_GRAPHICS_COMMON_V1_2_EXPORTED_CONSTANTS_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+    HAL_HDR_HDR10_PLUS = 4,
+} android_hdr_v1_2_t;
+
+typedef enum {
+    HAL_DATASPACE_DISPLAY_BT2020 = 142999552 /* ((STANDARD_BT2020 | TRANSFER_SRGB) | RANGE_FULL) */,
+    HAL_DATASPACE_DYNAMIC_DEPTH = 4098 /* 0x1002 */,
+    HAL_DATASPACE_JPEG_APP_SEGMENTS = 4099 /* 0x1003 */,
+    HAL_DATASPACE_HEIF = 4100 /* 0x1004 */,
+} android_dataspace_v1_2_t;
+
+typedef enum {
+    HAL_PIXEL_FORMAT_HSV_888 = 55 /* 0x37 */,
+} android_pixel_format_v1_2_t;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // HIDL_GENERATED_ANDROID_HARDWARE_GRAPHICS_COMMON_V1_2_EXPORTED_CONSTANTS_H_
diff --git a/libsystem/include/system/graphics-base.h b/libsystem/include/system/graphics-base.h
index ea92007..92ee077 100644
--- a/libsystem/include/system/graphics-base.h
+++ b/libsystem/include/system/graphics-base.h
@@ -3,5 +3,6 @@
 
 #include "graphics-base-v1.0.h"
 #include "graphics-base-v1.1.h"
+#include "graphics-base-v1.2.h"
 
 #endif  // SYSTEM_CORE_GRAPHICS_BASE_H_
diff --git a/libunwindstack/Android.bp b/libunwindstack/Android.bp
index 73237e6..9cd3d65 100644
--- a/libunwindstack/Android.bp
+++ b/libunwindstack/Android.bp
@@ -77,6 +77,7 @@
     ],
 
     cflags: [
+        "-DDEXFILE_SUPPORT",
         "-Wexit-time-destructors",
     ],
 
@@ -89,20 +90,18 @@
             ],
         },
         vendor: {
-            cflags: ["-DNO_LIBDEXFILE_SUPPORT"],
+            cflags: ["-UDEXFILE_SUPPORT"],
             exclude_srcs: [
                 "DexFile.cpp",
-                "DexFiles.cpp",
             ],
             exclude_shared_libs: [
                 "libdexfile_support",
             ],
         },
         recovery: {
-            cflags: ["-DNO_LIBDEXFILE_SUPPORT"],
+            cflags: ["-UDEXFILE_SUPPORT"],
             exclude_srcs: [
                 "DexFile.cpp",
-                "DexFiles.cpp",
             ],
             exclude_shared_libs: [
                 "libdexfile_support",
@@ -153,12 +152,12 @@
     shared_libs: [
         "libunwindstack",
     ],
+    relative_install_path: "libunwindstack_test",
 }
 
-cc_test {
-    name: "libunwindstack_test",
+cc_defaults {
+    name: "libunwindstack_testlib_flags",
     defaults: ["libunwindstack_flags"],
-    isolated: true,
 
     srcs: [
         "tests/ArmExidxDecodeTest.cpp",
@@ -183,7 +182,7 @@
         "tests/ElfTestUtils.cpp",
         "tests/IsolatedSettings.cpp",
         "tests/JitDebugTest.cpp",
-        "tests/LocalUnwinderTest.cpp",
+        "tests/LocalUpdatableMapsTest.cpp",
         "tests/LogFake.cpp",
         "tests/MapInfoCreateMemoryTest.cpp",
         "tests/MapInfoGetBuildIDTest.cpp",
@@ -211,6 +210,7 @@
         "tests/UnwindOfflineTest.cpp",
         "tests/UnwindTest.cpp",
         "tests/UnwinderTest.cpp",
+        "tests/VerifyBionicTerminationTest.cpp",
     ],
 
     cflags: [
@@ -238,25 +238,45 @@
         "tests/files/offline/bad_eh_frame_hdr_arm64/*",
         "tests/files/offline/debug_frame_first_x86/*",
         "tests/files/offline/debug_frame_load_bias_arm/*",
+        "tests/files/offline/eh_frame_bias_x86/*",
         "tests/files/offline/eh_frame_hdr_begin_x86_64/*",
         "tests/files/offline/invalid_elf_offset_arm/*",
         "tests/files/offline/jit_debug_arm/*",
         "tests/files/offline/jit_debug_x86/*",
         "tests/files/offline/jit_map_arm/*",
         "tests/files/offline/gnu_debugdata_arm/*",
+        "tests/files/offline/load_bias_different_section_bias_arm64/*",
         "tests/files/offline/load_bias_ro_rx_x86_64/*",
         "tests/files/offline/offset_arm/*",
         "tests/files/offline/shared_lib_in_apk_arm64/*",
         "tests/files/offline/shared_lib_in_apk_memory_only_arm64/*",
         "tests/files/offline/shared_lib_in_apk_single_map_arm64/*",
+        "tests/files/offline/signal_load_bias_arm/*",
         "tests/files/offline/straddle_arm/*",
         "tests/files/offline/straddle_arm64/*",
     ],
+}
+
+cc_test {
+    name: "libunwindstack_test",
+    defaults: ["libunwindstack_testlib_flags"],
+    isolated: true,
+
+    srcs: [
+        "tests/LocalUnwinderTest.cpp",
+    ],
     required: [
         "libunwindstack_local",
     ],
 }
 
+// Skip LocalUnwinderTest until atest understands required properly.
+cc_test {
+    name: "libunwindstack_unit_test",
+    defaults: ["libunwindstack_testlib_flags"],
+    isolated: true,
+}
+
 //-------------------------------------------------------------------------
 // Tools
 //-------------------------------------------------------------------------
diff --git a/libunwindstack/AndroidVersions.md b/libunwindstack/AndroidVersions.md
new file mode 100644
index 0000000..234f639
--- /dev/null
+++ b/libunwindstack/AndroidVersions.md
@@ -0,0 +1,116 @@
+# Unwinder Support Per Android Release
+This document describes the changes in the way the libunwindstack
+unwinder works on different Android versions. It does not describe
+every change in the code made between different versions, but is
+meant to allow an app developer to know what might be supported
+on different versions. It also describes the different way an unwind
+will display on different versions of Android.
+
+## Android P
+libunwindstack was first introduced in Android P.
+
+* Supports up to and including Dwarf 4 unwinding information.
+  See http://dwarfstd.org/ for Dwarf standards.
+* Supports Arm exidx unwinding.
+* Supports the gdb JIT unwinding interface, which is how ART creates unwinding
+  information for the JIT'd Java frames.
+* Supports special frames added to represent an ART Java interpreter frame.
+  ART has marked the dex pc using cfi information that the unwinder
+  understands and handles by adding a new frame in the stacktrace.
+
+## Note
+By default, lld creates two separate maps of the elf in memory, one read-only
+and one read/executable. The libunwindstack on P and the unwinder on older
+versions of Android will not unwind properly in this case. For apps that
+target Android P or older, make sure that `-Wl,--no-rosegment` is
+included in linker arguments when using lld.
+
+## Android Q
+* Fix bug (b/109824792) that handled load bias data incorrectly when
+  FDEs use pc relative addressing in the eh\_frame\_hdr.
+  Unfortunately, this wasn't fixed correctly in Q since it assumes
+  that the bias is coming from the program header for the executable
+  load. The real fix was to use the bias from the actual section data and
+  is not completely fixed until Android R. For apps targeting Android Q,
+  if it is being compiled with the llvm linker lld, it might be necessary
+  to add the linker option `-Wl,-zseparate-code` to avoid creating an elf
+  created this way.
+* Change the way the exidx section offset is found (b/110704153). Before
+  the p\_vaddr value from the program header minus the load bias was used
+  to find the start of the exidx data. Changed to use the p\_offset since
+  it doesn't require any load bias manipulations.
+* Fix bug handling of dwarf sections without any header (b/110235461).
+  Previously, the code assumed that FDEs are non-overlapping, and the FDEs
+  are always in sorted order from low pc to high pc. Thus the code would
+  read the entire set of CIEs/FDEs and then do a binary search to find
+  the appropriate FDE for a given pc. Now the code does a sequential read
+  and stops when it finds the FDE for a pc. It also understands the
+  overlapping FDEs, so find the first FDE that matches a pc. In practice,
+  elf files with this format only ever occurs if the file was generated
+  without an eh\_frame/eh\_frame\_hdr section and only a debug\_frame. The
+  other way this has been observed is when running simpleperf to unwind since
+  sometimes there is not enough information in the eh\_frame for all points
+  in the executable. On Android P, this would result in some incorrect
+  unwinds coming from simpleperf. Nearly all crashes from Android P should
+  be correct since the eh\_frame information was enough to do the unwind
+  properly.
+* Be permissive of badly formed elf files. Previously, any detected error
+  would result in unwinds stopping even if there is enough valid information
+  to do an unwind.
+  * The code now allows program header/section header offsets to point
+    to unreadable memory. As long as the code can find the unwind tables,
+    that is good enough.
+  * The code allows program headers/section headers to be missing.
+  * Allow a symbol table section header to point to invalid symbol table
+    values.
+* Support for the linker read-only segment option (b/109657296).
+  This is a feature of lld whereby there are two sections that
+  contain elf data. The first is read-only and contains the elf header data,
+  and the second is read-execute or execute only that
+  contains the executable code from the elf. Before this, the unwinder
+  always assumed that there was only a single read-execute section that
+  contained the elf header data and the executable code.
+* Build ID information for elf objects added. This will display the
+  NT\_GNU\_BUILD\_ID note found in elf files. This information can be used
+  to identify the exact version of a shared library to help get symbol
+  information when looking at a crash.
+* Add support for displaying the soname from an apk frame. Previously,
+  a frame map name would be only the apk, but now if the shared library
+  in the apk has set a soname, the map name will be `app.apk!libexample.so`
+  instead of only `app.apk`.
+* Minimal support for Dwarf 5. This merely treats a Dwarf 5 version
+  elf file as Dwarf 4. It does not support the new dwarf ops in Dwarf 5.
+  Since the new ops are not likely to be used very often, this allows
+  continuing to unwind even when encountering Dwarf 5 elf files.
+* Fix bug in pc handling of signal frames (b/130302288). In the previous
+  version, the pc would be wrong in the signal frame. The rest of the
+  unwind was correct, only the frame in the signal handler was incorrect
+  in Android P.
+* Detect when an elf file is not readable so that a message can be
+  displayed indicating that. This can happen when an app puts the shared
+  libraries in non-standard locations that are not readable due to
+  security restrictions (selinux rules).
+
+## Android R
+* Display the offsets for Java interpreter frames. If this frame came
+  from a non-zero offset map, no offset is printed. Previously, the
+  line would look like:
+
+    #17 pc 00500d7a  GoogleCamera.apk (com.google.camera.AndroidPriorityThread.run+10)
+
+  to:
+
+    #17 pc 00500d7a  GoogleCamera.apk (offset 0x11d0000) (com.google.camera.AndroidPriorityThread.run+10)
+* Fix bug where the load bias was set from the first PT\_LOAD program
+  header that has a zero p\_offset value. Now it is set from the first
+  executable PT\_LOAD program header. This has only ever been a problem
+  for host executables compiled for the x86\_64 architecture.
+* Switched to the libc++ demangler for function names. Previously, the
+  demangler used was not complete, so some less common demangled function
+  names would not be properly demangled or the function name would not be
+  demangled at all.
+* Fix bug in load bias handling. If the unwind information in the eh\_frame
+  or eh\_frame\_hdr does not have the same bias as the executable section,
+  and uses pc relative FDEs, the unwind will be incorrect. This tends
+  to truncate unwinds since the unwinder could not find the correct unwind
+  information for a given pc.
diff --git a/libunwindstack/DexFile.cpp b/libunwindstack/DexFile.cpp
index eaf867f..dff7a8b 100644
--- a/libunwindstack/DexFile.cpp
+++ b/libunwindstack/DexFile.cpp
@@ -22,6 +22,9 @@
 
 #include <memory>
 
+#define LOG_TAG "unwind"
+#include <log/log.h>
+
 #include <android-base/unique_fd.h>
 #include <art_api/dex_file_support.h>
 
@@ -32,6 +35,19 @@
 
 namespace unwindstack {
 
+static bool CheckDexSupport() {
+  if (std::string err_msg; !art_api::dex::TryLoadLibdexfileExternal(&err_msg)) {
+    ALOGW("Failed to initialize DEX file support: %s", err_msg.c_str());
+    return false;
+  }
+  return true;
+}
+
+static bool HasDexSupport() {
+  static bool has_dex_support = CheckDexSupport();
+  return has_dex_support;
+}
+
 std::unique_ptr<DexFile> DexFile::Create(uint64_t dex_file_offset_in_memory, Memory* memory,
                                          MapInfo* info) {
   if (!info->name.empty()) {
@@ -57,6 +73,10 @@
 
 std::unique_ptr<DexFileFromFile> DexFileFromFile::Create(uint64_t dex_file_offset_in_file,
                                                          const std::string& file) {
+  if (UNLIKELY(!HasDexSupport())) {
+    return nullptr;
+  }
+
   android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(file.c_str(), O_RDONLY | O_CLOEXEC)));
   if (fd == -1) {
     return nullptr;
@@ -75,6 +95,10 @@
 std::unique_ptr<DexFileFromMemory> DexFileFromMemory::Create(uint64_t dex_file_offset_in_memory,
                                                              Memory* memory,
                                                              const std::string& name) {
+  if (UNLIKELY(!HasDexSupport())) {
+    return nullptr;
+  }
+
   std::vector<uint8_t> backing_memory;
 
   for (size_t size = 0;;) {
diff --git a/libunwindstack/DexFiles.cpp b/libunwindstack/DexFiles.cpp
index 63a77e5..2057fad 100644
--- a/libunwindstack/DexFiles.cpp
+++ b/libunwindstack/DexFiles.cpp
@@ -27,10 +27,21 @@
 #include <unwindstack/Maps.h>
 #include <unwindstack/Memory.h>
 
+#if defined(DEXFILE_SUPPORT)
 #include "DexFile.h"
+#endif
 
 namespace unwindstack {
 
+#if !defined(DEXFILE_SUPPORT)
+// Empty class definition.
+class DexFile {
+ public:
+  DexFile() = default;
+  virtual ~DexFile() = default;
+};
+#endif
+
 struct DEXFileEntry32 {
   uint32_t next;
   uint32_t prev;
@@ -128,6 +139,7 @@
   FindAndReadVariable(maps, "__dex_debug_descriptor");
 }
 
+#if defined(DEXFILE_SUPPORT)
 DexFile* DexFiles::GetDexFile(uint64_t dex_file_offset, MapInfo* info) {
   // Lock while processing the data.
   DexFile* dex_file;
@@ -141,6 +153,11 @@
   }
   return dex_file;
 }
+#else
+DexFile* DexFiles::GetDexFile(uint64_t, MapInfo*) {
+  return nullptr;
+}
+#endif
 
 bool DexFiles::GetAddr(size_t index, uint64_t* addr) {
   if (index < addrs_.size()) {
@@ -154,6 +171,7 @@
   return false;
 }
 
+#if defined(DEXFILE_SUPPORT)
 void DexFiles::GetMethodInformation(Maps* maps, MapInfo* info, uint64_t dex_pc,
                                     std::string* method_name, uint64_t* method_offset) {
   std::lock_guard<std::mutex> guard(lock_);
@@ -175,5 +193,8 @@
     }
   }
 }
+#else
+void DexFiles::GetMethodInformation(Maps*, MapInfo*, uint64_t, std::string*, uint64_t*) {}
+#endif
 
 }  // namespace unwindstack
diff --git a/libunwindstack/DwarfDebugFrame.h b/libunwindstack/DwarfDebugFrame.h
index 388ab0a..635cefd 100644
--- a/libunwindstack/DwarfDebugFrame.h
+++ b/libunwindstack/DwarfDebugFrame.h
@@ -26,9 +26,9 @@
 namespace unwindstack {
 
 template <typename AddressType>
-class DwarfDebugFrame : public DwarfSectionImplNoHdr<AddressType> {
+class DwarfDebugFrame : public DwarfSectionImpl<AddressType> {
  public:
-  DwarfDebugFrame(Memory* memory) : DwarfSectionImplNoHdr<AddressType>(memory) {
+  DwarfDebugFrame(Memory* memory) : DwarfSectionImpl<AddressType>(memory) {
     this->cie32_value_ = static_cast<uint32_t>(-1);
     this->cie64_value_ = static_cast<uint64_t>(-1);
   }
diff --git a/libunwindstack/DwarfEhFrame.h b/libunwindstack/DwarfEhFrame.h
index df441fb..7a41e45 100644
--- a/libunwindstack/DwarfEhFrame.h
+++ b/libunwindstack/DwarfEhFrame.h
@@ -25,9 +25,9 @@
 namespace unwindstack {
 
 template <typename AddressType>
-class DwarfEhFrame : public DwarfSectionImplNoHdr<AddressType> {
+class DwarfEhFrame : public DwarfSectionImpl<AddressType> {
  public:
-  DwarfEhFrame(Memory* memory) : DwarfSectionImplNoHdr<AddressType>(memory) {}
+  DwarfEhFrame(Memory* memory) : DwarfSectionImpl<AddressType>(memory) {}
   virtual ~DwarfEhFrame() = default;
 
   uint64_t GetCieOffsetFromFde32(uint32_t pointer) override {
diff --git a/libunwindstack/DwarfEhFrameWithHdr.cpp b/libunwindstack/DwarfEhFrameWithHdr.cpp
index 802beca..1358e51 100644
--- a/libunwindstack/DwarfEhFrameWithHdr.cpp
+++ b/libunwindstack/DwarfEhFrameWithHdr.cpp
@@ -32,14 +32,19 @@
 }
 
 template <typename AddressType>
-bool DwarfEhFrameWithHdr<AddressType>::Init(uint64_t offset, uint64_t size, uint64_t load_bias) {
-  load_bias_ = load_bias;
+bool DwarfEhFrameWithHdr<AddressType>::EhFrameInit(uint64_t offset, uint64_t size,
+                                                   int64_t section_bias) {
+  return DwarfSectionImpl<AddressType>::Init(offset, size, section_bias);
+}
 
+template <typename AddressType>
+bool DwarfEhFrameWithHdr<AddressType>::Init(uint64_t offset, uint64_t, int64_t section_bias) {
   memory_.clear_func_offset();
   memory_.clear_text_offset();
   memory_.set_data_offset(offset);
   memory_.set_cur_offset(offset);
-  pc_offset_ = offset;
+
+  hdr_section_bias_ = section_bias;
 
   // Read the first four bytes all at once.
   uint8_t data[4];
@@ -56,7 +61,7 @@
     return false;
   }
 
-  ptr_encoding_ = data[1];
+  uint8_t ptr_encoding = data[1];
   uint8_t fde_count_encoding = data[2];
   table_encoding_ = data[3];
   table_entry_size_ = memory_.template GetEncodedSize<AddressType>(table_encoding_);
@@ -70,7 +75,8 @@
   }
 
   memory_.set_pc_offset(memory_.cur_offset());
-  if (!memory_.template ReadEncodedValue<AddressType>(ptr_encoding_, &ptr_offset_)) {
+  uint64_t ptr_offset;
+  if (!memory_.template ReadEncodedValue<AddressType>(ptr_encoding, &ptr_offset)) {
     last_error_.code = DWARF_ERROR_MEMORY_INVALID;
     last_error_.address = memory_.cur_offset();
     return false;
@@ -88,10 +94,8 @@
     return false;
   }
 
-  entries_offset_ = memory_.cur_offset();
-  entries_end_ = offset + size;
-  entries_data_offset_ = offset;
-  cur_entries_offset_ = entries_offset_;
+  hdr_entries_offset_ = memory_.cur_offset();
+  hdr_entries_data_offset_ = offset;
 
   return true;
 }
@@ -107,6 +111,16 @@
     return nullptr;
   }
 
+  // There is a possibility that this entry points to a zero length FDE
+  // due to a bug. If this happens, try and find the non-zero length FDE
+  // from eh_frame directly. See b/142483624.
+  if (fde->pc_start == fde->pc_end) {
+    fde = DwarfSectionImpl<AddressType>::GetFdeFromPc(pc);
+    if (fde == nullptr) {
+      return nullptr;
+    }
+  }
+
   // Guaranteed pc >= pc_start, need to check pc in the fde range.
   if (pc < fde->pc_end) {
     return fde;
@@ -124,8 +138,8 @@
   }
   FdeInfo* info = &fde_info_[index];
 
-  memory_.set_data_offset(entries_data_offset_);
-  memory_.set_cur_offset(entries_offset_ + 2 * index * table_entry_size_);
+  memory_.set_data_offset(hdr_entries_data_offset_);
+  memory_.set_cur_offset(hdr_entries_offset_ + 2 * index * table_entry_size_);
   memory_.set_pc_offset(0);
   uint64_t value;
   if (!memory_.template ReadEncodedValue<AddressType>(table_encoding_, &value) ||
@@ -138,7 +152,7 @@
 
   // Relative encodings require adding in the load bias.
   if (IsEncodingRelative(table_encoding_)) {
-    value += load_bias_;
+    value += hdr_section_bias_;
   }
   info->pc = value;
   return info;
@@ -190,6 +204,16 @@
     if (fde == nullptr) {
       break;
     }
+
+    // There is a possibility that this entry points to a zero length FDE
+    // due to a bug. If this happens, try and find the non-zero length FDE
+    // from eh_frame directly. See b/142483624.
+    if (fde->pc_start == fde->pc_end) {
+      const DwarfFde* fde_real = DwarfSectionImpl<AddressType>::GetFdeFromPc(fde->pc_start);
+      if (fde_real != nullptr) {
+        fde = fde_real;
+      }
+    }
     fdes->push_back(fde);
   }
 }
diff --git a/libunwindstack/DwarfEhFrameWithHdr.h b/libunwindstack/DwarfEhFrameWithHdr.h
index 0e5eef7..f7c010c 100644
--- a/libunwindstack/DwarfEhFrameWithHdr.h
+++ b/libunwindstack/DwarfEhFrameWithHdr.h
@@ -34,11 +34,7 @@
   // Add these so that the protected members of DwarfSectionImpl
   // can be accessed without needing a this->.
   using DwarfSectionImpl<AddressType>::memory_;
-  using DwarfSectionImpl<AddressType>::pc_offset_;
-  using DwarfSectionImpl<AddressType>::entries_offset_;
-  using DwarfSectionImpl<AddressType>::entries_end_;
   using DwarfSectionImpl<AddressType>::last_error_;
-  using DwarfSectionImpl<AddressType>::load_bias_;
 
   struct FdeInfo {
     AddressType pc;
@@ -49,19 +45,20 @@
   virtual ~DwarfEhFrameWithHdr() = default;
 
   uint64_t GetCieOffsetFromFde32(uint32_t pointer) override {
-    return this->memory_.cur_offset() - pointer - 4;
+    return memory_.cur_offset() - pointer - 4;
   }
 
   uint64_t GetCieOffsetFromFde64(uint64_t pointer) override {
-    return this->memory_.cur_offset() - pointer - 8;
+    return memory_.cur_offset() - pointer - 8;
   }
 
   uint64_t AdjustPcFromFde(uint64_t pc) override {
     // The eh_frame uses relative pcs.
-    return pc + this->memory_.cur_offset() - 4;
+    return pc + memory_.cur_offset() - 4;
   }
 
-  bool Init(uint64_t offset, uint64_t size, uint64_t load_bias) override;
+  bool EhFrameInit(uint64_t offset, uint64_t size, int64_t section_bias);
+  bool Init(uint64_t offset, uint64_t size, int64_t section_bias) override;
 
   const DwarfFde* GetFdeFromPc(uint64_t pc) override;
 
@@ -72,17 +69,15 @@
   void GetFdes(std::vector<const DwarfFde*>* fdes) override;
 
  protected:
-  uint8_t version_;
-  uint8_t ptr_encoding_;
-  uint8_t table_encoding_;
-  size_t table_entry_size_;
+  uint8_t version_ = 0;
+  uint8_t table_encoding_ = 0;
+  size_t table_entry_size_ = 0;
 
-  uint64_t ptr_offset_;
+  uint64_t hdr_entries_offset_ = 0;
+  uint64_t hdr_entries_data_offset_ = 0;
+  uint64_t hdr_section_bias_ = 0;
 
-  uint64_t entries_data_offset_;
-  uint64_t cur_entries_offset_ = 0;
-
-  uint64_t fde_count_;
+  uint64_t fde_count_ = 0;
   std::unordered_map<uint64_t, FdeInfo> fde_info_;
 };
 
diff --git a/libunwindstack/DwarfMemory.cpp b/libunwindstack/DwarfMemory.cpp
index b505900..2e388c6 100644
--- a/libunwindstack/DwarfMemory.cpp
+++ b/libunwindstack/DwarfMemory.cpp
@@ -111,7 +111,7 @@
       // Nothing to do.
       break;
     case DW_EH_PE_pcrel:
-      if (pc_offset_ == static_cast<uint64_t>(-1)) {
+      if (pc_offset_ == INT64_MAX) {
         // Unsupported encoding.
         return false;
       }
diff --git a/libunwindstack/DwarfSection.cpp b/libunwindstack/DwarfSection.cpp
index 849a31a..e6263f8 100644
--- a/libunwindstack/DwarfSection.cpp
+++ b/libunwindstack/DwarfSection.cpp
@@ -69,6 +69,7 @@
     return &cie_entry->second;
   }
   DwarfCie* cie = &cie_entries_[offset];
+  memory_.set_data_offset(entries_offset_);
   memory_.set_cur_offset(offset);
   if (!FillInCieHeader(cie) || !FillInCie(cie)) {
     // Erase the cached entry.
@@ -251,6 +252,7 @@
     return &fde_entry->second;
   }
   DwarfFde* fde = &fde_entries_[offset];
+  memory_.set_data_offset(entries_offset_);
   memory_.set_cur_offset(offset);
   if (!FillInFdeHeader(fde) || !FillInFde(fde)) {
     fde_entries_.erase(offset);
@@ -333,7 +335,7 @@
   memory_.set_cur_offset(cur_offset);
 
   // The load bias only applies to the start.
-  memory_.set_pc_offset(load_bias_);
+  memory_.set_pc_offset(section_bias_);
   bool valid = memory_.ReadEncodedValue<AddressType>(cie->fde_address_encoding, &fde->pc_start);
   fde->pc_start = AdjustPcFromFde(fde->pc_start);
 
@@ -591,8 +593,8 @@
 }
 
 template <typename AddressType>
-bool DwarfSectionImplNoHdr<AddressType>::Init(uint64_t offset, uint64_t size, uint64_t load_bias) {
-  load_bias_ = load_bias;
+bool DwarfSectionImpl<AddressType>::Init(uint64_t offset, uint64_t size, int64_t section_bias) {
+  section_bias_ = section_bias;
   entries_offset_ = offset;
   next_entries_offset_ = offset;
   entries_end_ = offset + size;
@@ -600,7 +602,6 @@
   memory_.clear_func_offset();
   memory_.clear_text_offset();
   memory_.set_cur_offset(offset);
-  memory_.set_data_offset(offset);
   pc_offset_ = offset;
 
   return true;
@@ -616,7 +617,7 @@
 // and an fde has a start pc of 0x100 and end pc of 0x500, two new entries
 // will be added: 0x200, 0x100 and 0x500, 0x400.
 template <typename AddressType>
-void DwarfSectionImplNoHdr<AddressType>::InsertFde(const DwarfFde* fde) {
+void DwarfSectionImpl<AddressType>::InsertFde(const DwarfFde* fde) {
   uint64_t start = fde->pc_start;
   uint64_t end = fde->pc_end;
   auto it = fdes_.upper_bound(start);
@@ -653,9 +654,10 @@
 }
 
 template <typename AddressType>
-bool DwarfSectionImplNoHdr<AddressType>::GetNextCieOrFde(DwarfFde** fde_entry) {
+bool DwarfSectionImpl<AddressType>::GetNextCieOrFde(const DwarfFde** fde_entry) {
   uint64_t start_offset = next_entries_offset_;
 
+  memory_.set_data_offset(entries_offset_);
   memory_.set_cur_offset(next_entries_offset_);
   uint32_t value32;
   if (!memory_.ReadBytes(&value32, sizeof(value32))) {
@@ -688,7 +690,7 @@
       entry_is_cie = true;
       cie_fde_encoding = DW_EH_PE_sdata8;
     } else {
-      cie_offset = this->GetCieOffsetFromFde64(value64);
+      cie_offset = GetCieOffsetFromFde64(value64);
     }
   } else {
     next_entries_offset_ = memory_.cur_offset() + value32;
@@ -704,37 +706,45 @@
       entry_is_cie = true;
       cie_fde_encoding = DW_EH_PE_sdata4;
     } else {
-      cie_offset = this->GetCieOffsetFromFde32(value32);
+      cie_offset = GetCieOffsetFromFde32(value32);
     }
   }
 
   if (entry_is_cie) {
-    DwarfCie* cie = &cie_entries_[start_offset];
-    cie->lsda_encoding = DW_EH_PE_omit;
-    cie->cfa_instructions_end = next_entries_offset_;
-    cie->fde_address_encoding = cie_fde_encoding;
+    auto entry = cie_entries_.find(start_offset);
+    if (entry == cie_entries_.end()) {
+      DwarfCie* cie = &cie_entries_[start_offset];
+      cie->lsda_encoding = DW_EH_PE_omit;
+      cie->cfa_instructions_end = next_entries_offset_;
+      cie->fde_address_encoding = cie_fde_encoding;
 
-    if (!this->FillInCie(cie)) {
-      cie_entries_.erase(start_offset);
-      return false;
+      if (!FillInCie(cie)) {
+        cie_entries_.erase(start_offset);
+        return false;
+      }
     }
     *fde_entry = nullptr;
   } else {
-    DwarfFde* fde = &fde_entries_[start_offset];
-    fde->cfa_instructions_end = next_entries_offset_;
-    fde->cie_offset = cie_offset;
+    auto entry = fde_entries_.find(start_offset);
+    if (entry != fde_entries_.end()) {
+      *fde_entry = &entry->second;
+    } else {
+      DwarfFde* fde = &fde_entries_[start_offset];
+      fde->cfa_instructions_end = next_entries_offset_;
+      fde->cie_offset = cie_offset;
 
-    if (!this->FillInFde(fde)) {
-      fde_entries_.erase(start_offset);
-      return false;
+      if (!FillInFde(fde)) {
+        fde_entries_.erase(start_offset);
+        return false;
+      }
+      *fde_entry = fde;
     }
-    *fde_entry = fde;
   }
   return true;
 }
 
 template <typename AddressType>
-void DwarfSectionImplNoHdr<AddressType>::GetFdes(std::vector<const DwarfFde*>* fdes) {
+void DwarfSectionImpl<AddressType>::GetFdes(std::vector<const DwarfFde*>* fdes) {
   // Loop through the already cached entries.
   uint64_t entry_offset = entries_offset_;
   while (entry_offset < next_entries_offset_) {
@@ -753,7 +763,7 @@
   }
 
   while (next_entries_offset_ < entries_end_) {
-    DwarfFde* fde;
+    const DwarfFde* fde;
     if (!GetNextCieOrFde(&fde)) {
       break;
     }
@@ -770,7 +780,7 @@
 }
 
 template <typename AddressType>
-const DwarfFde* DwarfSectionImplNoHdr<AddressType>::GetFdeFromPc(uint64_t pc) {
+const DwarfFde* DwarfSectionImpl<AddressType>::GetFdeFromPc(uint64_t pc) {
   // Search in the list of fdes we already have.
   auto it = fdes_.upper_bound(pc);
   if (it != fdes_.end()) {
@@ -783,7 +793,7 @@
   // to do a linear search of the fdes by pc. As fdes are read, a cached
   // search map is created.
   while (next_entries_offset_ < entries_end_) {
-    DwarfFde* fde;
+    const DwarfFde* fde;
     if (!GetNextCieOrFde(&fde)) {
       return nullptr;
     }
@@ -806,10 +816,6 @@
 template class DwarfSectionImpl<uint32_t>;
 template class DwarfSectionImpl<uint64_t>;
 
-// Explicitly instantiate DwarfSectionImplNoHdr
-template class DwarfSectionImplNoHdr<uint32_t>;
-template class DwarfSectionImplNoHdr<uint64_t>;
-
 // Explicitly instantiate DwarfDebugFrame
 template class DwarfDebugFrame<uint32_t>;
 template class DwarfDebugFrame<uint64_t>;
diff --git a/libunwindstack/Elf.cpp b/libunwindstack/Elf.cpp
index 3454913..f01b092 100644
--- a/libunwindstack/Elf.cpp
+++ b/libunwindstack/Elf.cpp
@@ -53,7 +53,7 @@
 
   valid_ = interface_->Init(&load_bias_);
   if (valid_) {
-    interface_->InitHeaders(load_bias_);
+    interface_->InitHeaders();
     InitGnuDebugdata();
   } else {
     interface_.reset(nullptr);
@@ -77,9 +77,9 @@
 
   // Ignore the load_bias from the compressed section, the correct load bias
   // is in the uncompressed data.
-  uint64_t load_bias;
+  int64_t load_bias;
   if (gnu->Init(&load_bias)) {
-    gnu->InitHeaders(load_bias);
+    gnu->InitHeaders();
     interface_->SetGnuDebugdataInterface(gnu);
   } else {
     // Free all of the memory associated with the gnu_debugdata section.
@@ -112,35 +112,33 @@
                      gnu_debugdata_interface_->GetFunctionName(addr, name, func_offset)));
 }
 
-bool Elf::GetGlobalVariable(const std::string& name, uint64_t* memory_address) {
+bool Elf::GetGlobalVariableOffset(const std::string& name, uint64_t* memory_offset) {
   if (!valid_) {
     return false;
   }
 
-  if (!interface_->GetGlobalVariable(name, memory_address) &&
+  uint64_t vaddr;
+  if (!interface_->GetGlobalVariable(name, &vaddr) &&
       (gnu_debugdata_interface_ == nullptr ||
-       !gnu_debugdata_interface_->GetGlobalVariable(name, memory_address))) {
+       !gnu_debugdata_interface_->GetGlobalVariable(name, &vaddr))) {
     return false;
   }
 
-  // Adjust by the load bias.
-  if (*memory_address < load_bias_) {
-    return false;
+  // Check the .data section.
+  uint64_t vaddr_start = interface_->data_vaddr_start();
+  if (vaddr >= vaddr_start && vaddr < interface_->data_vaddr_end()) {
+    *memory_offset = vaddr - vaddr_start + interface_->data_offset();
+    return true;
   }
 
-  *memory_address -= load_bias_;
-
-  // If this winds up in the dynamic section, then we might need to adjust
-  // the address.
-  uint64_t dynamic_end = interface_->dynamic_vaddr() + interface_->dynamic_size();
-  if (*memory_address >= interface_->dynamic_vaddr() && *memory_address < dynamic_end) {
-    if (interface_->dynamic_vaddr() > interface_->dynamic_offset()) {
-      *memory_address -= interface_->dynamic_vaddr() - interface_->dynamic_offset();
-    } else {
-      *memory_address += interface_->dynamic_offset() - interface_->dynamic_vaddr();
-    }
+  // Check the .dynamic section.
+  vaddr_start = interface_->dynamic_vaddr_start();
+  if (vaddr >= vaddr_start && vaddr < interface_->dynamic_vaddr_end()) {
+    *memory_offset = vaddr - vaddr_start + interface_->dynamic_offset();
+    return true;
   }
-  return true;
+
+  return false;
 }
 
 std::string Elf::GetBuildID() {
@@ -175,7 +173,12 @@
   if (!valid_) {
     return false;
   }
-  return regs->StepIfSignalHandler(rel_pc, this, process_memory);
+
+  // Convert the rel_pc to an elf_offset.
+  if (rel_pc < static_cast<uint64_t>(load_bias_)) {
+    return false;
+  }
+  return regs->StepIfSignalHandler(rel_pc - load_bias_, this, process_memory);
 }
 
 // The relative pc is always relative to the start of the map from which it comes.
@@ -229,7 +232,7 @@
 }
 
 bool Elf::IsValidPc(uint64_t pc) {
-  if (!valid_ || pc < load_bias_) {
+  if (!valid_ || (load_bias_ > 0 && pc < static_cast<uint64_t>(load_bias_))) {
     return false;
   }
 
@@ -299,7 +302,7 @@
   return interface.release();
 }
 
-uint64_t Elf::GetLoadBias(Memory* memory) {
+int64_t Elf::GetLoadBias(Memory* memory) {
   if (!IsValidElf(memory)) {
     return 0;
   }
diff --git a/libunwindstack/ElfInterface.cpp b/libunwindstack/ElfInterface.cpp
index bdfee01..7676289 100644
--- a/libunwindstack/ElfInterface.cpp
+++ b/libunwindstack/ElfInterface.cpp
@@ -124,10 +124,12 @@
 }
 
 template <typename AddressType>
-void ElfInterface::InitHeadersWithTemplate(uint64_t load_bias) {
+void ElfInterface::InitHeadersWithTemplate() {
   if (eh_frame_hdr_offset_ != 0) {
-    eh_frame_.reset(new DwarfEhFrameWithHdr<AddressType>(memory_));
-    if (!eh_frame_->Init(eh_frame_hdr_offset_, eh_frame_hdr_size_, load_bias)) {
+    DwarfEhFrameWithHdr<AddressType>* eh_frame_hdr = new DwarfEhFrameWithHdr<AddressType>(memory_);
+    eh_frame_.reset(eh_frame_hdr);
+    if (!eh_frame_hdr->EhFrameInit(eh_frame_offset_, eh_frame_size_, eh_frame_section_bias_) ||
+        !eh_frame_->Init(eh_frame_hdr_offset_, eh_frame_hdr_size_, eh_frame_hdr_section_bias_)) {
       eh_frame_.reset(nullptr);
     }
   }
@@ -136,21 +138,23 @@
     // If there is an eh_frame section without an eh_frame_hdr section,
     // or using the frame hdr object failed to init.
     eh_frame_.reset(new DwarfEhFrame<AddressType>(memory_));
-    if (!eh_frame_->Init(eh_frame_offset_, eh_frame_size_, load_bias)) {
+    if (!eh_frame_->Init(eh_frame_offset_, eh_frame_size_, eh_frame_section_bias_)) {
       eh_frame_.reset(nullptr);
     }
   }
 
   if (eh_frame_.get() == nullptr) {
     eh_frame_hdr_offset_ = 0;
+    eh_frame_hdr_section_bias_ = 0;
     eh_frame_hdr_size_ = static_cast<uint64_t>(-1);
     eh_frame_offset_ = 0;
+    eh_frame_section_bias_ = 0;
     eh_frame_size_ = static_cast<uint64_t>(-1);
   }
 
   if (debug_frame_offset_ != 0) {
     debug_frame_.reset(new DwarfDebugFrame<AddressType>(memory_));
-    if (!debug_frame_->Init(debug_frame_offset_, debug_frame_size_, load_bias)) {
+    if (!debug_frame_->Init(debug_frame_offset_, debug_frame_size_, debug_frame_section_bias_)) {
       debug_frame_.reset(nullptr);
       debug_frame_offset_ = 0;
       debug_frame_size_ = static_cast<uint64_t>(-1);
@@ -159,7 +163,7 @@
 }
 
 template <typename EhdrType, typename PhdrType, typename ShdrType>
-bool ElfInterface::ReadAllHeaders(uint64_t* load_bias) {
+bool ElfInterface::ReadAllHeaders(int64_t* load_bias) {
   EhdrType ehdr;
   if (!memory_->ReadFully(0, &ehdr, sizeof(ehdr))) {
     last_error_.code = ERROR_MEMORY_INVALID;
@@ -175,7 +179,7 @@
 }
 
 template <typename EhdrType, typename PhdrType>
-uint64_t ElfInterface::GetLoadBias(Memory* memory) {
+int64_t ElfInterface::GetLoadBias(Memory* memory) {
   EhdrType ehdr;
   if (!memory->ReadFully(0, &ehdr, sizeof(ehdr))) {
     return false;
@@ -187,15 +191,17 @@
     if (!memory->ReadFully(offset, &phdr, sizeof(phdr))) {
       return 0;
     }
-    if (phdr.p_type == PT_LOAD && phdr.p_offset == 0) {
-      return phdr.p_vaddr;
+
+    // Find the first executable load when looking for the load bias.
+    if (phdr.p_type == PT_LOAD && (phdr.p_flags & PF_X)) {
+      return static_cast<uint64_t>(phdr.p_vaddr) - phdr.p_offset;
     }
   }
   return 0;
 }
 
 template <typename EhdrType, typename PhdrType>
-void ElfInterface::ReadProgramHeaders(const EhdrType& ehdr, uint64_t* load_bias) {
+void ElfInterface::ReadProgramHeaders(const EhdrType& ehdr, int64_t* load_bias) {
   uint64_t offset = ehdr.e_phoff;
   bool first_exec_load_header = true;
   for (size_t i = 0; i < ehdr.e_phnum; i++, offset += ehdr.e_phentsize) {
@@ -214,8 +220,8 @@
       pt_loads_[phdr.p_offset] = LoadInfo{phdr.p_offset, phdr.p_vaddr,
                                           static_cast<size_t>(phdr.p_memsz)};
       // Only set the load bias from the first executable load header.
-      if (first_exec_load_header && phdr.p_vaddr > phdr.p_offset) {
-        *load_bias = phdr.p_vaddr - phdr.p_offset;
+      if (first_exec_load_header) {
+        *load_bias = static_cast<uint64_t>(phdr.p_vaddr) - phdr.p_offset;
       }
       first_exec_load_header = false;
       break;
@@ -224,13 +230,18 @@
     case PT_GNU_EH_FRAME:
       // This is really the pointer to the .eh_frame_hdr section.
       eh_frame_hdr_offset_ = phdr.p_offset;
+      eh_frame_hdr_section_bias_ = static_cast<uint64_t>(phdr.p_vaddr) - phdr.p_offset;
       eh_frame_hdr_size_ = phdr.p_memsz;
       break;
 
     case PT_DYNAMIC:
       dynamic_offset_ = phdr.p_offset;
-      dynamic_vaddr_ = phdr.p_vaddr;
-      dynamic_size_ = phdr.p_memsz;
+      dynamic_vaddr_start_ = phdr.p_vaddr;
+      if (__builtin_add_overflow(dynamic_vaddr_start_, phdr.p_memsz, &dynamic_vaddr_end_)) {
+        dynamic_offset_ = 0;
+        dynamic_vaddr_start_ = 0;
+        dynamic_vaddr_end_ = 0;
+      }
       break;
 
     default:
@@ -338,24 +349,29 @@
       if (shdr.sh_name < sec_size) {
         std::string name;
         if (memory_->ReadString(sec_offset + shdr.sh_name, &name)) {
-          uint64_t* offset_ptr = nullptr;
-          uint64_t* size_ptr = nullptr;
           if (name == ".debug_frame") {
-            offset_ptr = &debug_frame_offset_;
-            size_ptr = &debug_frame_size_;
+            debug_frame_offset_ = shdr.sh_offset;
+            debug_frame_size_ = shdr.sh_size;
+            debug_frame_section_bias_ = static_cast<uint64_t>(shdr.sh_addr) - shdr.sh_offset;
           } else if (name == ".gnu_debugdata") {
-            offset_ptr = &gnu_debugdata_offset_;
-            size_ptr = &gnu_debugdata_size_;
+            gnu_debugdata_offset_ = shdr.sh_offset;
+            gnu_debugdata_size_ = shdr.sh_size;
           } else if (name == ".eh_frame") {
-            offset_ptr = &eh_frame_offset_;
-            size_ptr = &eh_frame_size_;
+            eh_frame_offset_ = shdr.sh_offset;
+            eh_frame_section_bias_ = static_cast<uint64_t>(shdr.sh_addr) - shdr.sh_offset;
+            eh_frame_size_ = shdr.sh_size;
           } else if (eh_frame_hdr_offset_ == 0 && name == ".eh_frame_hdr") {
-            offset_ptr = &eh_frame_hdr_offset_;
-            size_ptr = &eh_frame_hdr_size_;
-          }
-          if (offset_ptr != nullptr) {
-            *offset_ptr = shdr.sh_offset;
-            *size_ptr = shdr.sh_size;
+            eh_frame_hdr_offset_ = shdr.sh_offset;
+            eh_frame_hdr_section_bias_ = static_cast<uint64_t>(shdr.sh_addr) - shdr.sh_offset;
+            eh_frame_hdr_size_ = shdr.sh_size;
+          } else if (name == ".data") {
+            data_offset_ = shdr.sh_offset;
+            data_vaddr_start_ = shdr.sh_addr;
+            if (__builtin_add_overflow(data_vaddr_start_, shdr.sh_size, &data_vaddr_end_)) {
+              data_offset_ = 0;
+              data_vaddr_start_ = 0;
+              data_vaddr_end_ = 0;
+            }
           }
         }
       }
@@ -394,7 +410,7 @@
   // Find the soname location from the dynamic headers section.
   DynType dyn;
   uint64_t offset = dynamic_offset_;
-  uint64_t max_offset = offset + dynamic_size_;
+  uint64_t max_offset = offset + dynamic_vaddr_end_ - dynamic_vaddr_start_;
   for (uint64_t offset = dynamic_offset_; offset < max_offset; offset += sizeof(DynType)) {
     if (!memory_->ReadFully(offset, &dyn, sizeof(dyn))) {
       last_error_.code = ERROR_MEMORY_INVALID;
@@ -637,16 +653,14 @@
 }
 
 // Instantiate all of the needed template functions.
-template void ElfInterface::InitHeadersWithTemplate<uint32_t>(uint64_t);
-template void ElfInterface::InitHeadersWithTemplate<uint64_t>(uint64_t);
+template void ElfInterface::InitHeadersWithTemplate<uint32_t>();
+template void ElfInterface::InitHeadersWithTemplate<uint64_t>();
 
-template bool ElfInterface::ReadAllHeaders<Elf32_Ehdr, Elf32_Phdr, Elf32_Shdr>(uint64_t*);
-template bool ElfInterface::ReadAllHeaders<Elf64_Ehdr, Elf64_Phdr, Elf64_Shdr>(uint64_t*);
+template bool ElfInterface::ReadAllHeaders<Elf32_Ehdr, Elf32_Phdr, Elf32_Shdr>(int64_t*);
+template bool ElfInterface::ReadAllHeaders<Elf64_Ehdr, Elf64_Phdr, Elf64_Shdr>(int64_t*);
 
-template void ElfInterface::ReadProgramHeaders<Elf32_Ehdr, Elf32_Phdr>(const Elf32_Ehdr&,
-                                                                       uint64_t*);
-template void ElfInterface::ReadProgramHeaders<Elf64_Ehdr, Elf64_Phdr>(const Elf64_Ehdr&,
-                                                                       uint64_t*);
+template void ElfInterface::ReadProgramHeaders<Elf32_Ehdr, Elf32_Phdr>(const Elf32_Ehdr&, int64_t*);
+template void ElfInterface::ReadProgramHeaders<Elf64_Ehdr, Elf64_Phdr>(const Elf64_Ehdr&, int64_t*);
 
 template void ElfInterface::ReadSectionHeaders<Elf32_Ehdr, Elf32_Shdr>(const Elf32_Ehdr&);
 template void ElfInterface::ReadSectionHeaders<Elf64_Ehdr, Elf64_Shdr>(const Elf64_Ehdr&);
@@ -668,8 +682,8 @@
 template void ElfInterface::GetMaxSizeWithTemplate<Elf32_Ehdr>(Memory*, uint64_t*);
 template void ElfInterface::GetMaxSizeWithTemplate<Elf64_Ehdr>(Memory*, uint64_t*);
 
-template uint64_t ElfInterface::GetLoadBias<Elf32_Ehdr, Elf32_Phdr>(Memory*);
-template uint64_t ElfInterface::GetLoadBias<Elf64_Ehdr, Elf64_Phdr>(Memory*);
+template int64_t ElfInterface::GetLoadBias<Elf32_Ehdr, Elf32_Phdr>(Memory*);
+template int64_t ElfInterface::GetLoadBias<Elf64_Ehdr, Elf64_Phdr>(Memory*);
 
 template std::string ElfInterface::ReadBuildIDFromMemory<Elf32_Ehdr, Elf32_Shdr, Elf32_Nhdr>(
     Memory*);
diff --git a/libunwindstack/ElfInterfaceArm.cpp b/libunwindstack/ElfInterfaceArm.cpp
index 3dd5d54..76f2dc8 100644
--- a/libunwindstack/ElfInterfaceArm.cpp
+++ b/libunwindstack/ElfInterfaceArm.cpp
@@ -26,7 +26,7 @@
 
 namespace unwindstack {
 
-bool ElfInterfaceArm::Init(uint64_t* load_bias) {
+bool ElfInterfaceArm::Init(int64_t* load_bias) {
   if (!ElfInterface32::Init(load_bias)) {
     return false;
   }
diff --git a/libunwindstack/ElfInterfaceArm.h b/libunwindstack/ElfInterfaceArm.h
index 4c3a0c3..1d71cac 100644
--- a/libunwindstack/ElfInterfaceArm.h
+++ b/libunwindstack/ElfInterfaceArm.h
@@ -64,7 +64,7 @@
   iterator begin() { return iterator(this, 0); }
   iterator end() { return iterator(this, total_entries_); }
 
-  bool Init(uint64_t* load_bias) override;
+  bool Init(int64_t* section_bias) override;
 
   bool GetPrel31Addr(uint32_t offset, uint32_t* addr);
 
diff --git a/libunwindstack/Global.cpp b/libunwindstack/Global.cpp
index a20be00..ec977e1 100644
--- a/libunwindstack/Global.cpp
+++ b/libunwindstack/Global.cpp
@@ -39,28 +39,22 @@
   }
 }
 
-uint64_t Global::GetVariableOffset(MapInfo* info, const std::string& variable) {
-  if (!search_libs_.empty()) {
-    bool found = false;
-    const char* lib = basename(info->name.c_str());
-    for (const std::string& name : search_libs_) {
-      if (name == lib) {
-        found = true;
-        break;
-      }
-    }
-    if (!found) {
-      return 0;
-    }
+bool Global::Searchable(const std::string& name) {
+  if (search_libs_.empty()) {
+    return true;
   }
 
-  Elf* elf = info->GetElf(memory_, arch());
-  uint64_t ptr;
-  // Find first non-empty list (libraries might be loaded multiple times).
-  if (elf->GetGlobalVariable(variable, &ptr) && ptr != 0) {
-    return ptr + info->start;
+  if (name.empty()) {
+    return false;
   }
-  return 0;
+
+  const char* base_name = basename(name.c_str());
+  for (const std::string& lib : search_libs_) {
+    if (base_name == lib) {
+      return true;
+    }
+  }
+  return false;
 }
 
 void Global::FindAndReadVariable(Maps* maps, const char* var_str) {
@@ -78,24 +72,27 @@
   //   f2000-f3000 2000 rw- /system/lib/libc.so
   MapInfo* map_start = nullptr;
   for (const auto& info : *maps) {
-    if (map_start != nullptr) {
-      if (map_start->name == info->name) {
-        if (info->offset != 0 &&
-            (info->flags & (PROT_READ | PROT_WRITE)) == (PROT_READ | PROT_WRITE)) {
-          uint64_t ptr = GetVariableOffset(map_start, variable);
-          if (ptr != 0 && ReadVariableData(ptr)) {
-            break;
-          } else {
-            // Failed to find the global variable, do not bother trying again.
-            map_start = nullptr;
+    if (map_start != nullptr && map_start->name == info->name) {
+      if (info->offset != 0 &&
+          (info->flags & (PROT_READ | PROT_WRITE)) == (PROT_READ | PROT_WRITE)) {
+        Elf* elf = map_start->GetElf(memory_, arch());
+        uint64_t ptr;
+        if (elf->GetGlobalVariableOffset(variable, &ptr) && ptr != 0) {
+          uint64_t offset_end = info->offset + info->end - info->start;
+          if (ptr >= info->offset && ptr < offset_end) {
+            ptr = info->start + ptr - info->offset;
+            if (ReadVariableData(ptr)) {
+              break;
+            }
           }
         }
-      } else {
         map_start = nullptr;
       }
+    } else {
+      map_start = nullptr;
     }
     if (map_start == nullptr && (info->flags & PROT_READ) && info->offset == 0 &&
-        !info->name.empty()) {
+        Searchable(info->name)) {
       map_start = info.get();
     }
   }
diff --git a/libunwindstack/MapInfo.cpp b/libunwindstack/MapInfo.cpp
index 5b30a4d..f2dad84 100644
--- a/libunwindstack/MapInfo.cpp
+++ b/libunwindstack/MapInfo.cpp
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include <stdint.h>
 #include <sys/mman.h>
 #include <sys/types.h>
 #include <unistd.h>
@@ -263,8 +264,8 @@
 }
 
 uint64_t MapInfo::GetLoadBias(const std::shared_ptr<Memory>& process_memory) {
-  uint64_t cur_load_bias = load_bias.load();
-  if (cur_load_bias != static_cast<uint64_t>(-1)) {
+  int64_t cur_load_bias = load_bias.load();
+  if (cur_load_bias != INT64_MAX) {
     return cur_load_bias;
   }
 
diff --git a/libunwindstack/Maps.cpp b/libunwindstack/Maps.cpp
index 5da73e4..0ab68db 100644
--- a/libunwindstack/Maps.cpp
+++ b/libunwindstack/Maps.cpp
@@ -139,6 +139,9 @@
       if (start == info->start && end == info->end && flags == info->flags && *name == info->name) {
         // No need to check
         search_map_idx = old_map_idx + 1;
+        if (new_map_idx + 1 < maps_.size()) {
+          maps_[new_map_idx + 1]->prev_map = info.get();
+        }
         maps_[new_map_idx] = nullptr;
         total_entries--;
         break;
@@ -149,9 +152,10 @@
       }
 
       // Never delete these maps, they may be in use. The assumption is
-      // that there will only every be a handfull of these so waiting
+      // that there will only every be a handful of these so waiting
       // to destroy them is not too expensive.
       saved_maps_.emplace_back(std::move(info));
+      search_map_idx = old_map_idx + 1;
       maps_[old_map_idx] = nullptr;
       total_entries--;
     }
diff --git a/libunwindstack/RegsArm.cpp b/libunwindstack/RegsArm.cpp
index 885dc94..1b1f7eb 100644
--- a/libunwindstack/RegsArm.cpp
+++ b/libunwindstack/RegsArm.cpp
@@ -127,12 +127,12 @@
   return regs;
 }
 
-bool RegsArm::StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) {
+bool RegsArm::StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) {
   uint32_t data;
   Memory* elf_memory = elf->memory();
   // Read from elf memory since it is usually more expensive to read from
   // process memory.
-  if (!elf_memory->ReadFully(rel_pc, &data, sizeof(data))) {
+  if (!elf_memory->ReadFully(elf_offset, &data, sizeof(data))) {
     return false;
   }
 
diff --git a/libunwindstack/RegsArm64.cpp b/libunwindstack/RegsArm64.cpp
index e9787aa..1df1dff 100644
--- a/libunwindstack/RegsArm64.cpp
+++ b/libunwindstack/RegsArm64.cpp
@@ -103,6 +103,7 @@
   fn("sp", regs_[ARM64_REG_SP]);
   fn("lr", regs_[ARM64_REG_LR]);
   fn("pc", regs_[ARM64_REG_PC]);
+  fn("pst", regs_[ARM64_REG_PSTATE]);
 }
 
 Regs* RegsArm64::Read(void* remote_data) {
@@ -113,6 +114,7 @@
   uint64_t* reg_data = reinterpret_cast<uint64_t*>(regs->RawData());
   reg_data[ARM64_REG_PC] = user->pc;
   reg_data[ARM64_REG_SP] = user->sp;
+  reg_data[ARM64_REG_PSTATE] = user->pstate;
   return regs;
 }
 
@@ -124,12 +126,12 @@
   return regs;
 }
 
-bool RegsArm64::StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) {
+bool RegsArm64::StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) {
   uint64_t data;
   Memory* elf_memory = elf->memory();
   // Read from elf memory since it is usually more expensive to read from
   // process memory.
-  if (!elf_memory->ReadFully(rel_pc, &data, sizeof(data))) {
+  if (!elf_memory->ReadFully(elf_offset, &data, sizeof(data))) {
     return false;
   }
 
diff --git a/libunwindstack/RegsMips.cpp b/libunwindstack/RegsMips.cpp
index f330fe0..ebefe42 100644
--- a/libunwindstack/RegsMips.cpp
+++ b/libunwindstack/RegsMips.cpp
@@ -129,13 +129,13 @@
   return regs;
 }
 
-bool RegsMips::StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) {
+bool RegsMips::StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) {
   uint64_t data;
   uint64_t offset = 0;
   Memory* elf_memory = elf->memory();
   // Read from elf memory since it is usually more expensive to read from
   // process memory.
-  if (!elf_memory->ReadFully(rel_pc, &data, sizeof(data))) {
+  if (!elf_memory->ReadFully(elf_offset, &data, sizeof(data))) {
     return false;
   }
 
diff --git a/libunwindstack/RegsMips64.cpp b/libunwindstack/RegsMips64.cpp
index 3f67d92..be2fd22 100644
--- a/libunwindstack/RegsMips64.cpp
+++ b/libunwindstack/RegsMips64.cpp
@@ -127,12 +127,12 @@
   return regs;
 }
 
-bool RegsMips64::StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) {
+bool RegsMips64::StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) {
   uint64_t data;
   Memory* elf_memory = elf->memory();
   // Read from elf memory since it is usually more expensive to read from
   // process memory.
-  if (!elf_memory->Read(rel_pc, &data, sizeof(data))) {
+  if (!elf_memory->Read(elf_offset, &data, sizeof(data))) {
     return false;
   }
 
diff --git a/libunwindstack/RegsX86.cpp b/libunwindstack/RegsX86.cpp
index 9bb39d1..5538fc0 100644
--- a/libunwindstack/RegsX86.cpp
+++ b/libunwindstack/RegsX86.cpp
@@ -119,12 +119,12 @@
   return regs;
 }
 
-bool RegsX86::StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) {
+bool RegsX86::StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) {
   uint64_t data;
   Memory* elf_memory = elf->memory();
   // Read from elf memory since it is usually more expensive to read from
   // process memory.
-  if (!elf_memory->ReadFully(rel_pc, &data, sizeof(data))) {
+  if (!elf_memory->ReadFully(elf_offset, &data, sizeof(data))) {
     return false;
   }
 
diff --git a/libunwindstack/RegsX86_64.cpp b/libunwindstack/RegsX86_64.cpp
index 74cd1cb..5b9aa58 100644
--- a/libunwindstack/RegsX86_64.cpp
+++ b/libunwindstack/RegsX86_64.cpp
@@ -139,17 +139,17 @@
   return regs;
 }
 
-bool RegsX86_64::StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) {
+bool RegsX86_64::StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) {
   uint64_t data;
   Memory* elf_memory = elf->memory();
   // Read from elf memory since it is usually more expensive to read from
   // process memory.
-  if (!elf_memory->ReadFully(rel_pc, &data, sizeof(data)) || data != 0x0f0000000fc0c748) {
+  if (!elf_memory->ReadFully(elf_offset, &data, sizeof(data)) || data != 0x0f0000000fc0c748) {
     return false;
   }
 
   uint16_t data2;
-  if (!elf_memory->ReadFully(rel_pc + 8, &data2, sizeof(data2)) || data2 != 0x0f05) {
+  if (!elf_memory->ReadFully(elf_offset + 8, &data2, sizeof(data2)) || data2 != 0x0f05) {
     return false;
   }
 
diff --git a/libunwindstack/TEST_MAPPING b/libunwindstack/TEST_MAPPING
new file mode 100644
index 0000000..55771c0
--- /dev/null
+++ b/libunwindstack/TEST_MAPPING
@@ -0,0 +1,7 @@
+{
+  "presubmit": [
+    {
+      "name": "libunwindstack_unit_test"
+    }
+  ]
+}
diff --git a/libunwindstack/Unwinder.cpp b/libunwindstack/Unwinder.cpp
index 7556482..1bb0319 100644
--- a/libunwindstack/Unwinder.cpp
+++ b/libunwindstack/Unwinder.cpp
@@ -34,9 +34,7 @@
 #include <unwindstack/Memory.h>
 #include <unwindstack/Unwinder.h>
 
-#if !defined(NO_LIBDEXFILE_SUPPORT)
 #include <unwindstack/DexFiles.h>
-#endif
 
 // Use the demangler from libc++.
 extern "C" char* __cxa_demangle(const char*, char*, size_t*, int* status);
@@ -84,7 +82,7 @@
     return;
   }
 
-#if !defined(NO_LIBDEXFILE_SUPPORT)
+#if defined(DEXFILE_SUPPORT)
   if (dex_files_ == nullptr) {
     return;
   }
@@ -309,7 +307,7 @@
   }
 }
 
-std::string Unwinder::FormatFrame(const FrameData& frame) {
+std::string Unwinder::FormatFrame(const FrameData& frame) const {
   std::string data;
   if (regs_->Is32Bit()) {
     data += android::base::StringPrintf("  #%02zu pc %08" PRIx64, frame.num, frame.rel_pc);
@@ -355,7 +353,7 @@
   return data;
 }
 
-std::string Unwinder::FormatFrame(size_t frame_num) {
+std::string Unwinder::FormatFrame(size_t frame_num) const {
   if (frame_num >= frames_.size()) {
     return "";
   }
@@ -367,12 +365,10 @@
   jit_debug_ = jit_debug;
 }
 
-#if !defined(NO_LIBDEXFILE_SUPPORT)
 void Unwinder::SetDexFiles(DexFiles* dex_files, ArchEnum arch) {
   dex_files->SetArch(arch);
   dex_files_ = dex_files;
 }
-#endif
 
 bool UnwinderFromPid::Init(ArchEnum arch) {
   if (pid_ == getpid()) {
@@ -390,7 +386,7 @@
   jit_debug_ptr_.reset(new JitDebug(process_memory_));
   jit_debug_ = jit_debug_ptr_.get();
   SetJitDebug(jit_debug_, arch);
-#if !defined(NO_LIBDEXFILE_SUPPORT)
+#if defined(DEXFILE_SUPPORT)
   dex_files_ptr_.reset(new DexFiles(process_memory_));
   dex_files_ = dex_files_ptr_.get();
   SetDexFiles(dex_files_, arch);
diff --git a/libunwindstack/include/unwindstack/DwarfMemory.h b/libunwindstack/include/unwindstack/DwarfMemory.h
index 8dd8d2b..c45699a 100644
--- a/libunwindstack/include/unwindstack/DwarfMemory.h
+++ b/libunwindstack/include/unwindstack/DwarfMemory.h
@@ -49,8 +49,8 @@
   uint64_t cur_offset() { return cur_offset_; }
   void set_cur_offset(uint64_t cur_offset) { cur_offset_ = cur_offset; }
 
-  void set_pc_offset(uint64_t offset) { pc_offset_ = offset; }
-  void clear_pc_offset() { pc_offset_ = static_cast<uint64_t>(-1); }
+  void set_pc_offset(int64_t offset) { pc_offset_ = offset; }
+  void clear_pc_offset() { pc_offset_ = INT64_MAX; }
 
   void set_data_offset(uint64_t offset) { data_offset_ = offset; }
   void clear_data_offset() { data_offset_ = static_cast<uint64_t>(-1); }
@@ -65,7 +65,7 @@
   Memory* memory_;
   uint64_t cur_offset_ = 0;
 
-  uint64_t pc_offset_ = static_cast<uint64_t>(-1);
+  int64_t pc_offset_ = INT64_MAX;
   uint64_t data_offset_ = static_cast<uint64_t>(-1);
   uint64_t func_offset_ = static_cast<uint64_t>(-1);
   uint64_t text_offset_ = static_cast<uint64_t>(-1);
diff --git a/libunwindstack/include/unwindstack/DwarfSection.h b/libunwindstack/include/unwindstack/DwarfSection.h
index e9942de..c244749 100644
--- a/libunwindstack/include/unwindstack/DwarfSection.h
+++ b/libunwindstack/include/unwindstack/DwarfSection.h
@@ -86,7 +86,7 @@
   DwarfErrorCode LastErrorCode() { return last_error_.code; }
   uint64_t LastErrorAddress() { return last_error_.address; }
 
-  virtual bool Init(uint64_t offset, uint64_t size, uint64_t load_bias) = 0;
+  virtual bool Init(uint64_t offset, uint64_t size, int64_t section_bias) = 0;
 
   virtual bool Eval(const DwarfCie*, Memory*, const dwarf_loc_regs_t&, Regs*, bool*) = 0;
 
@@ -125,10 +125,16 @@
   DwarfSectionImpl(Memory* memory) : DwarfSection(memory) {}
   virtual ~DwarfSectionImpl() = default;
 
+  bool Init(uint64_t offset, uint64_t size, int64_t section_bias) override;
+
   const DwarfCie* GetCieFromOffset(uint64_t offset);
 
   const DwarfFde* GetFdeFromOffset(uint64_t offset);
 
+  const DwarfFde* GetFdeFromPc(uint64_t pc) override;
+
+  void GetFdes(std::vector<const DwarfFde*>* fdes) override;
+
   bool EvalRegister(const DwarfLocation* loc, uint32_t reg, AddressType* reg_ptr, void* info);
 
   bool Eval(const DwarfCie* cie, Memory* regular_memory, const dwarf_loc_regs_t& loc_regs,
@@ -139,6 +145,8 @@
   bool Log(uint8_t indent, uint64_t pc, const DwarfFde* fde) override;
 
  protected:
+  bool GetNextCieOrFde(const DwarfFde** fde_entry);
+
   bool FillInCieHeader(DwarfCie* cie);
 
   bool FillInCie(DwarfCie* cie);
@@ -150,43 +158,13 @@
   bool EvalExpression(const DwarfLocation& loc, Memory* regular_memory, AddressType* value,
                       RegsInfo<AddressType>* regs_info, bool* is_dex_pc);
 
-  uint64_t load_bias_ = 0;
-  uint64_t entries_offset_ = 0;
-  uint64_t entries_end_ = 0;
-  uint64_t pc_offset_ = 0;
-};
-
-template <typename AddressType>
-class DwarfSectionImplNoHdr : public DwarfSectionImpl<AddressType> {
- public:
-  // Add these so that the protected members of DwarfSectionImpl
-  // can be accessed without needing a this->.
-  using DwarfSectionImpl<AddressType>::memory_;
-  using DwarfSectionImpl<AddressType>::pc_offset_;
-  using DwarfSectionImpl<AddressType>::entries_offset_;
-  using DwarfSectionImpl<AddressType>::entries_end_;
-  using DwarfSectionImpl<AddressType>::last_error_;
-  using DwarfSectionImpl<AddressType>::load_bias_;
-  using DwarfSectionImpl<AddressType>::cie_entries_;
-  using DwarfSectionImpl<AddressType>::fde_entries_;
-  using DwarfSectionImpl<AddressType>::cie32_value_;
-  using DwarfSectionImpl<AddressType>::cie64_value_;
-
-  DwarfSectionImplNoHdr(Memory* memory) : DwarfSectionImpl<AddressType>(memory) {}
-  virtual ~DwarfSectionImplNoHdr() = default;
-
-  bool Init(uint64_t offset, uint64_t size, uint64_t load_bias) override;
-
-  const DwarfFde* GetFdeFromPc(uint64_t pc) override;
-
-  void GetFdes(std::vector<const DwarfFde*>* fdes) override;
-
- protected:
-  bool GetNextCieOrFde(DwarfFde** fde_entry);
-
   void InsertFde(const DwarfFde* fde);
 
+  int64_t section_bias_ = 0;
+  uint64_t entries_offset_ = 0;
+  uint64_t entries_end_ = 0;
   uint64_t next_entries_offset_ = 0;
+  uint64_t pc_offset_ = 0;
 
   std::map<uint64_t, std::pair<uint64_t, const DwarfFde*>> fdes_;
 };
diff --git a/libunwindstack/include/unwindstack/Elf.h b/libunwindstack/include/unwindstack/Elf.h
index 56bf318..472ed92 100644
--- a/libunwindstack/include/unwindstack/Elf.h
+++ b/libunwindstack/include/unwindstack/Elf.h
@@ -63,7 +63,7 @@
 
   bool GetFunctionName(uint64_t addr, std::string* name, uint64_t* func_offset);
 
-  bool GetGlobalVariable(const std::string& name, uint64_t* memory_address);
+  bool GetGlobalVariableOffset(const std::string& name, uint64_t* memory_offset);
 
   uint64_t GetRelPc(uint64_t pc, const MapInfo* map_info);
 
@@ -75,7 +75,7 @@
 
   std::string GetBuildID();
 
-  uint64_t GetLoadBias() { return load_bias_; }
+  int64_t GetLoadBias() { return load_bias_; }
 
   bool IsValidPc(uint64_t pc);
 
@@ -101,7 +101,7 @@
 
   static bool GetInfo(Memory* memory, uint64_t* size);
 
-  static uint64_t GetLoadBias(Memory* memory);
+  static int64_t GetLoadBias(Memory* memory);
 
   static std::string GetBuildID(Memory* memory);
 
@@ -116,7 +116,7 @@
 
  protected:
   bool valid_ = false;
-  uint64_t load_bias_ = 0;
+  int64_t load_bias_ = 0;
   std::unique_ptr<ElfInterface> interface_;
   std::unique_ptr<Memory> memory_;
   uint32_t machine_type_;
diff --git a/libunwindstack/include/unwindstack/ElfInterface.h b/libunwindstack/include/unwindstack/ElfInterface.h
index dbd917d..0c39b23 100644
--- a/libunwindstack/include/unwindstack/ElfInterface.h
+++ b/libunwindstack/include/unwindstack/ElfInterface.h
@@ -52,9 +52,9 @@
   ElfInterface(Memory* memory) : memory_(memory) {}
   virtual ~ElfInterface();
 
-  virtual bool Init(uint64_t* load_bias) = 0;
+  virtual bool Init(int64_t* load_bias) = 0;
 
-  virtual void InitHeaders(uint64_t load_bias) = 0;
+  virtual void InitHeaders() = 0;
 
   virtual std::string GetSoname() = 0;
 
@@ -77,13 +77,19 @@
   void SetGnuDebugdataInterface(ElfInterface* interface) { gnu_debugdata_interface_ = interface; }
 
   uint64_t dynamic_offset() { return dynamic_offset_; }
-  uint64_t dynamic_vaddr() { return dynamic_vaddr_; }
-  uint64_t dynamic_size() { return dynamic_size_; }
+  uint64_t dynamic_vaddr_start() { return dynamic_vaddr_start_; }
+  uint64_t dynamic_vaddr_end() { return dynamic_vaddr_end_; }
+  uint64_t data_offset() { return data_offset_; }
+  uint64_t data_vaddr_start() { return data_vaddr_start_; }
+  uint64_t data_vaddr_end() { return data_vaddr_end_; }
   uint64_t eh_frame_hdr_offset() { return eh_frame_hdr_offset_; }
+  int64_t eh_frame_hdr_section_bias() { return eh_frame_hdr_section_bias_; }
   uint64_t eh_frame_hdr_size() { return eh_frame_hdr_size_; }
   uint64_t eh_frame_offset() { return eh_frame_offset_; }
+  int64_t eh_frame_section_bias() { return eh_frame_section_bias_; }
   uint64_t eh_frame_size() { return eh_frame_size_; }
   uint64_t debug_frame_offset() { return debug_frame_offset_; }
+  int64_t debug_frame_section_bias() { return debug_frame_section_bias_; }
   uint64_t debug_frame_size() { return debug_frame_size_; }
   uint64_t gnu_debugdata_offset() { return gnu_debugdata_offset_; }
   uint64_t gnu_debugdata_size() { return gnu_debugdata_size_; }
@@ -98,20 +104,20 @@
   uint64_t LastErrorAddress() { return last_error_.address; }
 
   template <typename EhdrType, typename PhdrType>
-  static uint64_t GetLoadBias(Memory* memory);
+  static int64_t GetLoadBias(Memory* memory);
 
   template <typename EhdrType, typename ShdrType, typename NhdrType>
   static std::string ReadBuildIDFromMemory(Memory* memory);
 
  protected:
   template <typename AddressType>
-  void InitHeadersWithTemplate(uint64_t load_bias);
+  void InitHeadersWithTemplate();
 
   template <typename EhdrType, typename PhdrType, typename ShdrType>
-  bool ReadAllHeaders(uint64_t* load_bias);
+  bool ReadAllHeaders(int64_t* load_bias);
 
   template <typename EhdrType, typename PhdrType>
-  void ReadProgramHeaders(const EhdrType& ehdr, uint64_t* load_bias);
+  void ReadProgramHeaders(const EhdrType& ehdr, int64_t* load_bias);
 
   template <typename EhdrType, typename ShdrType>
   void ReadSectionHeaders(const EhdrType& ehdr);
@@ -138,16 +144,23 @@
 
   // Stored elf data.
   uint64_t dynamic_offset_ = 0;
-  uint64_t dynamic_vaddr_ = 0;
-  uint64_t dynamic_size_ = 0;
+  uint64_t dynamic_vaddr_start_ = 0;
+  uint64_t dynamic_vaddr_end_ = 0;
+
+  uint64_t data_offset_ = 0;
+  uint64_t data_vaddr_start_ = 0;
+  uint64_t data_vaddr_end_ = 0;
 
   uint64_t eh_frame_hdr_offset_ = 0;
+  int64_t eh_frame_hdr_section_bias_ = 0;
   uint64_t eh_frame_hdr_size_ = 0;
 
   uint64_t eh_frame_offset_ = 0;
+  int64_t eh_frame_section_bias_ = 0;
   uint64_t eh_frame_size_ = 0;
 
   uint64_t debug_frame_offset_ = 0;
+  int64_t debug_frame_section_bias_ = 0;
   uint64_t debug_frame_size_ = 0;
 
   uint64_t gnu_debugdata_offset_ = 0;
@@ -175,13 +188,11 @@
   ElfInterface32(Memory* memory) : ElfInterface(memory) {}
   virtual ~ElfInterface32() = default;
 
-  bool Init(uint64_t* load_bias) override {
+  bool Init(int64_t* load_bias) override {
     return ElfInterface::ReadAllHeaders<Elf32_Ehdr, Elf32_Phdr, Elf32_Shdr>(load_bias);
   }
 
-  void InitHeaders(uint64_t load_bias) override {
-    ElfInterface::InitHeadersWithTemplate<uint32_t>(load_bias);
-  }
+  void InitHeaders() override { ElfInterface::InitHeadersWithTemplate<uint32_t>(); }
 
   std::string GetSoname() override { return ElfInterface::GetSonameWithTemplate<Elf32_Dyn>(); }
 
@@ -205,13 +216,11 @@
   ElfInterface64(Memory* memory) : ElfInterface(memory) {}
   virtual ~ElfInterface64() = default;
 
-  bool Init(uint64_t* load_bias) override {
+  bool Init(int64_t* load_bias) override {
     return ElfInterface::ReadAllHeaders<Elf64_Ehdr, Elf64_Phdr, Elf64_Shdr>(load_bias);
   }
 
-  void InitHeaders(uint64_t load_bias) override {
-    ElfInterface::InitHeadersWithTemplate<uint64_t>(load_bias);
-  }
+  void InitHeaders() override { ElfInterface::InitHeadersWithTemplate<uint64_t>(); }
 
   std::string GetSoname() override { return ElfInterface::GetSonameWithTemplate<Elf64_Dyn>(); }
 
diff --git a/libunwindstack/include/unwindstack/Global.h b/libunwindstack/include/unwindstack/Global.h
index a7e6c15..b9bb141 100644
--- a/libunwindstack/include/unwindstack/Global.h
+++ b/libunwindstack/include/unwindstack/Global.h
@@ -45,7 +45,7 @@
   ArchEnum arch() { return arch_; }
 
  protected:
-  uint64_t GetVariableOffset(MapInfo* info, const std::string& variable);
+  bool Searchable(const std::string& name);
   void FindAndReadVariable(Maps* maps, const char* variable);
 
   virtual bool ReadVariableData(uint64_t offset) = 0;
diff --git a/libunwindstack/include/unwindstack/MachineArm64.h b/libunwindstack/include/unwindstack/MachineArm64.h
index e8b778b..e953335 100644
--- a/libunwindstack/include/unwindstack/MachineArm64.h
+++ b/libunwindstack/include/unwindstack/MachineArm64.h
@@ -55,6 +55,7 @@
   ARM64_REG_R30,
   ARM64_REG_R31,
   ARM64_REG_PC,
+  ARM64_REG_PSTATE,
   ARM64_REG_LAST,
 
   ARM64_REG_SP = ARM64_REG_R31,
diff --git a/libunwindstack/include/unwindstack/MapInfo.h b/libunwindstack/include/unwindstack/MapInfo.h
index 13ce10f..8f0c516 100644
--- a/libunwindstack/include/unwindstack/MapInfo.h
+++ b/libunwindstack/include/unwindstack/MapInfo.h
@@ -39,7 +39,7 @@
         flags(flags),
         name(name),
         prev_map(map_info),
-        load_bias(static_cast<uint64_t>(-1)),
+        load_bias(INT64_MAX),
         build_id(0) {}
   MapInfo(MapInfo* map_info, uint64_t start, uint64_t end, uint64_t offset, uint64_t flags,
           const std::string& name)
@@ -49,7 +49,7 @@
         flags(flags),
         name(name),
         prev_map(map_info),
-        load_bias(static_cast<uint64_t>(-1)),
+        load_bias(INT64_MAX),
         build_id(0) {}
   ~MapInfo();
 
@@ -59,17 +59,20 @@
   uint16_t flags = 0;
   std::string name;
   std::shared_ptr<Elf> elf;
+  // The offset of the beginning of this mapping to the beginning of the
+  // ELF file.
+  // elf_offset == offset - elf_start_offset.
   // This value is only non-zero if the offset is non-zero but there is
   // no elf signature found at that offset.
   uint64_t elf_offset = 0;
-  // This value is the offset from the map in memory that is the start
-  // of the elf. This is not equal to offset when the linker splits
+  // This value is the offset into the file of the map in memory that is the
+  // start of the elf. This is not equal to offset when the linker splits
   // shared libraries into a read-only and read-execute map.
   uint64_t elf_start_offset = 0;
 
   MapInfo* prev_map = nullptr;
 
-  std::atomic_uint64_t load_bias;
+  std::atomic_int64_t load_bias;
 
   // This is a pointer to a new'd std::string.
   // Using an atomic value means that we don't need to lock and will
diff --git a/libunwindstack/include/unwindstack/Maps.h b/libunwindstack/include/unwindstack/Maps.h
index 1784394..e53f367 100644
--- a/libunwindstack/include/unwindstack/Maps.h
+++ b/libunwindstack/include/unwindstack/Maps.h
@@ -105,7 +105,7 @@
 
   const std::string GetMapsFile() const override;
 
- private:
+ protected:
   std::vector<std::unique_ptr<MapInfo>> saved_maps_;
 };
 
diff --git a/libunwindstack/include/unwindstack/Regs.h b/libunwindstack/include/unwindstack/Regs.h
index 1c2a81c..4f761b4 100644
--- a/libunwindstack/include/unwindstack/Regs.h
+++ b/libunwindstack/include/unwindstack/Regs.h
@@ -66,7 +66,7 @@
 
   virtual uint64_t GetPcAdjustment(uint64_t rel_pc, Elf* elf) = 0;
 
-  virtual bool StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) = 0;
+  virtual bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) = 0;
 
   virtual bool SetPcFromReturnAddress(Memory* process_memory) = 0;
 
diff --git a/libunwindstack/include/unwindstack/RegsArm.h b/libunwindstack/include/unwindstack/RegsArm.h
index 44f6744..aa029be 100644
--- a/libunwindstack/include/unwindstack/RegsArm.h
+++ b/libunwindstack/include/unwindstack/RegsArm.h
@@ -40,7 +40,7 @@
 
   bool SetPcFromReturnAddress(Memory* process_memory) override;
 
-  bool StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) override;
+  bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) override;
 
   void IterateRegisters(std::function<void(const char*, uint64_t)>) override final;
 
diff --git a/libunwindstack/include/unwindstack/RegsArm64.h b/libunwindstack/include/unwindstack/RegsArm64.h
index a72f91f..5cd7e5b 100644
--- a/libunwindstack/include/unwindstack/RegsArm64.h
+++ b/libunwindstack/include/unwindstack/RegsArm64.h
@@ -40,7 +40,7 @@
 
   bool SetPcFromReturnAddress(Memory* process_memory) override;
 
-  bool StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) override;
+  bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) override;
 
   void IterateRegisters(std::function<void(const char*, uint64_t)>) override final;
 
diff --git a/libunwindstack/include/unwindstack/RegsMips.h b/libunwindstack/include/unwindstack/RegsMips.h
index c9dd202..8164a15 100644
--- a/libunwindstack/include/unwindstack/RegsMips.h
+++ b/libunwindstack/include/unwindstack/RegsMips.h
@@ -40,7 +40,7 @@
 
   bool SetPcFromReturnAddress(Memory* process_memory) override;
 
-  bool StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) override;
+  bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) override;
 
   void IterateRegisters(std::function<void(const char*, uint64_t)>) override final;
 
diff --git a/libunwindstack/include/unwindstack/RegsMips64.h b/libunwindstack/include/unwindstack/RegsMips64.h
index 7c42812..c982542 100644
--- a/libunwindstack/include/unwindstack/RegsMips64.h
+++ b/libunwindstack/include/unwindstack/RegsMips64.h
@@ -40,7 +40,7 @@
 
   bool SetPcFromReturnAddress(Memory* process_memory) override;
 
-  bool StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) override;
+  bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) override;
 
   void IterateRegisters(std::function<void(const char*, uint64_t)>) override final;
 
diff --git a/libunwindstack/include/unwindstack/RegsX86.h b/libunwindstack/include/unwindstack/RegsX86.h
index d19e449..2323a4f 100644
--- a/libunwindstack/include/unwindstack/RegsX86.h
+++ b/libunwindstack/include/unwindstack/RegsX86.h
@@ -41,7 +41,7 @@
 
   bool SetPcFromReturnAddress(Memory* process_memory) override;
 
-  bool StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) override;
+  bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) override;
 
   void SetFromUcontext(x86_ucontext_t* ucontext);
 
diff --git a/libunwindstack/include/unwindstack/RegsX86_64.h b/libunwindstack/include/unwindstack/RegsX86_64.h
index dc9a220..3e919a4 100644
--- a/libunwindstack/include/unwindstack/RegsX86_64.h
+++ b/libunwindstack/include/unwindstack/RegsX86_64.h
@@ -41,7 +41,7 @@
 
   bool SetPcFromReturnAddress(Memory* process_memory) override;
 
-  bool StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) override;
+  bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) override;
 
   void SetFromUcontext(x86_64_ucontext_t* ucontext);
 
diff --git a/libunwindstack/include/unwindstack/Unwinder.h b/libunwindstack/include/unwindstack/Unwinder.h
index 52b3578..67762c0 100644
--- a/libunwindstack/include/unwindstack/Unwinder.h
+++ b/libunwindstack/include/unwindstack/Unwinder.h
@@ -77,7 +77,7 @@
   void Unwind(const std::vector<std::string>* initial_map_names_to_skip = nullptr,
               const std::vector<std::string>* map_suffixes_to_ignore = nullptr);
 
-  size_t NumFrames() { return frames_.size(); }
+  size_t NumFrames() const { return frames_.size(); }
 
   const std::vector<FrameData>& frames() { return frames_; }
 
@@ -87,8 +87,8 @@
     return frames;
   }
 
-  std::string FormatFrame(size_t frame_num);
-  std::string FormatFrame(const FrameData& frame);
+  std::string FormatFrame(size_t frame_num) const;
+  std::string FormatFrame(const FrameData& frame) const;
 
   void SetJitDebug(JitDebug* jit_debug, ArchEnum arch);
 
@@ -107,9 +107,7 @@
 
   void SetDisplayBuildID(bool display_build_id) { display_build_id_ = display_build_id; }
 
-#if !defined(NO_LIBDEXFILE_SUPPORT)
   void SetDexFiles(DexFiles* dex_files, ArchEnum arch);
-#endif
 
   bool elf_from_memory_not_file() { return elf_from_memory_not_file_; }
 
@@ -128,9 +126,7 @@
   std::vector<FrameData> frames_;
   std::shared_ptr<Memory> process_memory_;
   JitDebug* jit_debug_ = nullptr;
-#if !defined(NO_LIBDEXFILE_SUPPORT)
   DexFiles* dex_files_ = nullptr;
-#endif
   bool resolve_names_ = true;
   bool embedded_soname_ = true;
   bool display_build_id_ = false;
@@ -151,9 +147,7 @@
   pid_t pid_;
   std::unique_ptr<Maps> maps_ptr_;
   std::unique_ptr<JitDebug> jit_debug_ptr_;
-#if !defined(NO_LIBDEXFILE_SUPPORT)
   std::unique_ptr<DexFiles> dex_files_ptr_;
-#endif
 };
 
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/ArmExidxDecodeTest.cpp b/libunwindstack/tests/ArmExidxDecodeTest.cpp
index 7b1dd92..69a7816 100644
--- a/libunwindstack/tests/ArmExidxDecodeTest.cpp
+++ b/libunwindstack/tests/ArmExidxDecodeTest.cpp
@@ -1662,7 +1662,7 @@
   ASSERT_EQ(0x10U, (*exidx_->regs())[15]);
 }
 
-INSTANTIATE_TEST_SUITE_P(, ArmExidxDecodeTest,
+INSTANTIATE_TEST_SUITE_P(Unwindstack, ArmExidxDecodeTest,
                          ::testing::Values("logging", "register_logging", "no_logging"));
 
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/DexFilesTest.cpp b/libunwindstack/tests/DexFilesTest.cpp
index 1ea9e5c..0dd3af6 100644
--- a/libunwindstack/tests/DexFilesTest.cpp
+++ b/libunwindstack/tests/DexFilesTest.cpp
@@ -36,14 +36,18 @@
 
 class DexFilesTest : public ::testing::Test {
  protected:
-  void CreateFakeElf(MapInfo* map_info) {
+  void CreateFakeElf(MapInfo* map_info, uint64_t global_offset, uint64_t data_offset,
+                     uint64_t data_vaddr, uint64_t data_size) {
     MemoryFake* memory = new MemoryFake;
     ElfFake* elf = new ElfFake(memory);
     elf->FakeSetValid(true);
     ElfInterfaceFake* interface = new ElfInterfaceFake(memory);
     elf->FakeSetInterface(interface);
 
-    interface->FakeSetGlobalVariable("__dex_debug_descriptor", 0x800);
+    interface->FakeSetGlobalVariable("__dex_debug_descriptor", global_offset);
+    interface->FakeSetDataOffset(data_offset);
+    interface->FakeSetDataVaddrStart(data_vaddr);
+    interface->FakeSetDataVaddrEnd(data_vaddr + data_size);
     map_info->elf.reset(elf);
   }
 
@@ -54,11 +58,11 @@
     maps_.reset(
         new BufferMaps("1000-4000 ---s 00000000 00:00 0 /fake/elf\n"
                        "4000-6000 r--s 00000000 00:00 0 /fake/elf\n"
-                       "6000-8000 -wxs 00000000 00:00 0 /fake/elf\n"
+                       "6000-8000 -wxs 00002000 00:00 0 /fake/elf\n"
                        "a000-c000 r--p 00000000 00:00 0 /fake/elf2\n"
-                       "c000-f000 rw-p 00001000 00:00 0 /fake/elf2\n"
+                       "c000-f000 rw-p 00002000 00:00 0 /fake/elf2\n"
                        "f000-11000 r--p 00000000 00:00 0 /fake/elf3\n"
-                       "100000-110000 rw-p 0001000 00:00 0 /fake/elf3\n"
+                       "100000-110000 rw-p 00f1000 00:00 0 /fake/elf3\n"
                        "200000-210000 rw-p 0002000 00:00 0 /fake/elf3\n"
                        "300000-400000 rw-p 0003000 00:00 0 /fake/elf3\n"));
     ASSERT_TRUE(maps_->Parse());
@@ -66,17 +70,17 @@
     // Global variable in a section that is not readable.
     MapInfo* map_info = maps_->Get(kMapGlobalNonReadable);
     ASSERT_TRUE(map_info != nullptr);
-    CreateFakeElf(map_info);
+    CreateFakeElf(map_info, 0x2800, 0x2000, 0x2000, 0x3000);
 
     // Global variable not set by default.
     map_info = maps_->Get(kMapGlobalSetToZero);
     ASSERT_TRUE(map_info != nullptr);
-    CreateFakeElf(map_info);
+    CreateFakeElf(map_info, 0x2800, 0x2000, 0x2000, 0x3000);
 
     // Global variable set in this map.
     map_info = maps_->Get(kMapGlobal);
     ASSERT_TRUE(map_info != nullptr);
-    CreateFakeElf(map_info);
+    CreateFakeElf(map_info, 0xf1800, 0xf1000, 0xf1000, 0x10000);
   }
 
   void SetUp() override {
@@ -156,7 +160,7 @@
   uint64_t method_offset = 0x124;
   MapInfo* info = maps_->Get(kMapDexFiles);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x100800, 0x200000);
   WriteEntry32(0x200000, 0, 0, 0x300000);
   WriteDex(0x300000);
 
@@ -172,7 +176,7 @@
   uint64_t method_offset = 0x124;
   MapInfo* info = maps_->Get(kMapDexFiles);
 
-  WriteDescriptor64(0xf800, 0x200000);
+  WriteDescriptor64(0x100800, 0x200000);
   WriteEntry64(0x200000, 0, 0, 0x301000);
   WriteDex(0x301000);
 
@@ -186,7 +190,7 @@
   uint64_t method_offset = 0x124;
   MapInfo* info = maps_->Get(kMapDexFiles);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x100800, 0x200000);
   WriteEntry32(0x200000, 0x200100, 0, 0x100000);
   WriteEntry32(0x200100, 0, 0x200000, 0x300000);
   WriteDex(0x300000);
@@ -203,7 +207,7 @@
   uint64_t method_offset = 0x124;
   MapInfo* info = maps_->Get(kMapDexFiles);
 
-  WriteDescriptor64(0xf800, 0x200000);
+  WriteDescriptor64(0x100800, 0x200000);
   WriteEntry64(0x200000, 0x200100, 0, 0x100000);
   WriteEntry64(0x200100, 0, 0x200000, 0x300000);
   WriteDex(0x300000);
@@ -218,7 +222,7 @@
   uint64_t method_offset = 0x124;
   MapInfo* info = maps_->Get(kMapDexFiles);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x100800, 0x200000);
   WriteEntry32(0x200000, 0, 0, 0x300000);
   WriteDex(0x300000);
 
@@ -238,7 +242,7 @@
   uint64_t method_offset = 0x124;
   MapInfo* info = maps_->Get(kMapDexFiles);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x100800, 0x200000);
   WriteEntry32(0x200000, 0x200100, 0, 0x100000);
   WriteEntry32(0x200100, 0, 0x200000, 0x300000);
   WriteDex(0x300000);
@@ -274,9 +278,9 @@
   MapInfo* info = maps_->Get(kMapDexFiles);
 
   // First global variable found, but value is zero.
-  WriteDescriptor32(0xa800, 0);
+  WriteDescriptor32(0xc800, 0);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x100800, 0x200000);
   WriteEntry32(0x200000, 0, 0, 0x300000);
   WriteDex(0x300000);
 
@@ -289,7 +293,7 @@
   dex_files_->SetArch(ARCH_ARM);
   method_name = "fail";
   method_offset = 0x123;
-  WriteDescriptor32(0xa800, 0x100000);
+  WriteDescriptor32(0xc800, 0x100000);
   dex_files_->GetMethodInformation(maps_.get(), info, 0x300100, &method_name, &method_offset);
   EXPECT_EQ("fail", method_name);
   EXPECT_EQ(0x123U, method_offset);
@@ -303,9 +307,9 @@
   MapInfo* info = maps_->Get(kMapDexFiles);
 
   // First global variable found, but value is zero.
-  WriteDescriptor64(0xa800, 0);
+  WriteDescriptor64(0xc800, 0);
 
-  WriteDescriptor64(0xf800, 0x200000);
+  WriteDescriptor64(0x100800, 0x200000);
   WriteEntry64(0x200000, 0, 0, 0x300000);
   WriteDex(0x300000);
 
@@ -318,7 +322,7 @@
   dex_files_->SetArch(ARCH_ARM64);
   method_name = "fail";
   method_offset = 0x123;
-  WriteDescriptor64(0xa800, 0x100000);
+  WriteDescriptor64(0xc800, 0x100000);
   dex_files_->GetMethodInformation(maps_.get(), info, 0x300100, &method_name, &method_offset);
   EXPECT_EQ("fail", method_name);
   EXPECT_EQ(0x123U, method_offset);
diff --git a/libunwindstack/tests/DwarfEhFrameWithHdrTest.cpp b/libunwindstack/tests/DwarfEhFrameWithHdrTest.cpp
index 78608e3..768a808 100644
--- a/libunwindstack/tests/DwarfEhFrameWithHdrTest.cpp
+++ b/libunwindstack/tests/DwarfEhFrameWithHdrTest.cpp
@@ -36,10 +36,8 @@
   ~TestDwarfEhFrameWithHdr() = default;
 
   void TestSetTableEncoding(uint8_t encoding) { this->table_encoding_ = encoding; }
-  void TestSetEntriesOffset(uint64_t offset) { this->entries_offset_ = offset; }
-  void TestSetEntriesEnd(uint64_t end) { this->entries_end_ = end; }
-  void TestSetEntriesDataOffset(uint64_t offset) { this->entries_data_offset_ = offset; }
-  void TestSetCurEntriesOffset(uint64_t offset) { this->cur_entries_offset_ = offset; }
+  void TestSetHdrEntriesOffset(uint64_t offset) { this->hdr_entries_offset_ = offset; }
+  void TestSetHdrEntriesDataOffset(uint64_t offset) { this->hdr_entries_data_offset_ = offset; }
   void TestSetTableEntrySize(size_t size) { this->table_entry_size_ = size; }
 
   void TestSetFdeCount(uint64_t count) { this->fde_count_ = count; }
@@ -48,15 +46,11 @@
   }
 
   uint8_t TestGetVersion() { return this->version_; }
-  uint8_t TestGetPtrEncoding() { return this->ptr_encoding_; }
-  uint64_t TestGetPtrOffset() { return this->ptr_offset_; }
   uint8_t TestGetTableEncoding() { return this->table_encoding_; }
   uint64_t TestGetTableEntrySize() { return this->table_entry_size_; }
   uint64_t TestGetFdeCount() { return this->fde_count_; }
-  uint64_t TestGetEntriesOffset() { return this->entries_offset_; }
-  uint64_t TestGetEntriesEnd() { return this->entries_end_; }
-  uint64_t TestGetEntriesDataOffset() { return this->entries_data_offset_; }
-  uint64_t TestGetCurEntriesOffset() { return this->cur_entries_offset_; }
+  uint64_t TestGetHdrEntriesOffset() { return this->hdr_entries_offset_; }
+  uint64_t TestGetHdrEntriesDataOffset() { return this->hdr_entries_data_offset_; }
 };
 
 template <typename TypeParam>
@@ -85,15 +79,11 @@
 
   ASSERT_TRUE(this->eh_frame_->Init(0x1000, 0x100, 0));
   EXPECT_EQ(1U, this->eh_frame_->TestGetVersion());
-  EXPECT_EQ(DW_EH_PE_udata2, this->eh_frame_->TestGetPtrEncoding());
   EXPECT_EQ(DW_EH_PE_sdata4, this->eh_frame_->TestGetTableEncoding());
   EXPECT_EQ(4U, this->eh_frame_->TestGetTableEntrySize());
   EXPECT_EQ(126U, this->eh_frame_->TestGetFdeCount());
-  EXPECT_EQ(0x500U, this->eh_frame_->TestGetPtrOffset());
-  EXPECT_EQ(0x100aU, this->eh_frame_->TestGetEntriesOffset());
-  EXPECT_EQ(0x1100U, this->eh_frame_->TestGetEntriesEnd());
-  EXPECT_EQ(0x1000U, this->eh_frame_->TestGetEntriesDataOffset());
-  EXPECT_EQ(0x100aU, this->eh_frame_->TestGetCurEntriesOffset());
+  EXPECT_EQ(0x100aU, this->eh_frame_->TestGetHdrEntriesOffset());
+  EXPECT_EQ(0x1000U, this->eh_frame_->TestGetHdrEntriesDataOffset());
 
   // Verify a zero table entry size fails to init.
   this->memory_.SetData8(0x1003, 0x1);
@@ -137,17 +127,14 @@
   this->memory_.SetData32(0x140c, 0x200);
   this->memory_.SetData16(0x1410, 0);
 
+  ASSERT_TRUE(this->eh_frame_->EhFrameInit(0x1300, 0x200, 0x2000));
   ASSERT_TRUE(this->eh_frame_->Init(0x1000, 0x100, 0x2000));
   EXPECT_EQ(1U, this->eh_frame_->TestGetVersion());
-  EXPECT_EQ(DW_EH_PE_udata2, this->eh_frame_->TestGetPtrEncoding());
   EXPECT_EQ(0x1b, this->eh_frame_->TestGetTableEncoding());
   EXPECT_EQ(4U, this->eh_frame_->TestGetTableEntrySize());
   EXPECT_EQ(1U, this->eh_frame_->TestGetFdeCount());
-  EXPECT_EQ(0x500U, this->eh_frame_->TestGetPtrOffset());
-  EXPECT_EQ(0x100aU, this->eh_frame_->TestGetEntriesOffset());
-  EXPECT_EQ(0x1100U, this->eh_frame_->TestGetEntriesEnd());
-  EXPECT_EQ(0x1000U, this->eh_frame_->TestGetEntriesDataOffset());
-  EXPECT_EQ(0x100aU, this->eh_frame_->TestGetCurEntriesOffset());
+  EXPECT_EQ(0x100aU, this->eh_frame_->TestGetHdrEntriesOffset());
+  EXPECT_EQ(0x1000U, this->eh_frame_->TestGetHdrEntriesDataOffset());
 
   const DwarfFde* fde = this->eh_frame_->GetFdeFromPc(0x4600);
   ASSERT_TRUE(fde != nullptr);
@@ -155,6 +142,115 @@
   EXPECT_EQ(0x4700U, fde->pc_end);
 }
 
+TYPED_TEST_P(DwarfEhFrameWithHdrTest, Init_non_zero_load_bias_different_from_eh_frame_bias) {
+  this->memory_.SetMemory(0x1000, std::vector<uint8_t>{0x1, DW_EH_PE_udata2, DW_EH_PE_udata4,
+                                                       DW_EH_PE_pcrel | DW_EH_PE_sdata4});
+  this->memory_.SetData16(0x1004, 0x500);
+  this->memory_.SetData32(0x1006, 1);
+  this->memory_.SetData32(0x100a, 0x2500);
+  this->memory_.SetData32(0x100e, 0x1400);
+
+  // CIE 32 information.
+  this->memory_.SetData32(0x1300, 0xfc);
+  this->memory_.SetData32(0x1304, 0);
+  this->memory_.SetMemory(0x1308, std::vector<uint8_t>{1, 'z', 'R', '\0', 0, 0, 0, 0, 0x1b});
+
+  // FDE 32 information.
+  this->memory_.SetData32(0x1400, 0xfc);
+  this->memory_.SetData32(0x1404, 0x104);
+  this->memory_.SetData32(0x1408, 0x20f8);
+  this->memory_.SetData32(0x140c, 0x200);
+  this->memory_.SetData16(0x1410, 0);
+
+  ASSERT_TRUE(this->eh_frame_->EhFrameInit(0x1300, 0x200, 0x1000));
+  ASSERT_TRUE(this->eh_frame_->Init(0x1000, 0x100, 0x2000));
+  EXPECT_EQ(1U, this->eh_frame_->TestGetVersion());
+  EXPECT_EQ(0x1b, this->eh_frame_->TestGetTableEncoding());
+  EXPECT_EQ(4U, this->eh_frame_->TestGetTableEntrySize());
+  EXPECT_EQ(1U, this->eh_frame_->TestGetFdeCount());
+  EXPECT_EQ(0x100aU, this->eh_frame_->TestGetHdrEntriesOffset());
+  EXPECT_EQ(0x1000U, this->eh_frame_->TestGetHdrEntriesDataOffset());
+
+  const DwarfFde* fde = this->eh_frame_->GetFdeFromPc(0x4600);
+  ASSERT_TRUE(fde != nullptr);
+  EXPECT_EQ(0x4500U, fde->pc_start);
+  EXPECT_EQ(0x4700U, fde->pc_end);
+}
+
+TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdeFromPc_wtih_empty_fde) {
+  this->memory_.SetMemory(0x1000, std::vector<uint8_t>{0x1, DW_EH_PE_udata2, DW_EH_PE_udata4,
+                                                       DW_EH_PE_pcrel | DW_EH_PE_sdata4});
+  this->memory_.SetData16(0x1004, 0x500);
+  this->memory_.SetData32(0x1006, 1);
+  this->memory_.SetData32(0x100a, 0x2500);
+  this->memory_.SetData32(0x100e, 0x1400);
+
+  // CIE 32 information.
+  this->memory_.SetData32(0x1300, 0xfc);
+  this->memory_.SetData32(0x1304, 0);
+  this->memory_.SetMemory(0x1308, std::vector<uint8_t>{1, 'z', 'R', '\0', 0, 0, 0, 0, 0x1b});
+
+  // FDE 32 information.
+  this->memory_.SetData32(0x1400, 0xfc);
+  this->memory_.SetData32(0x1404, 0x104);
+  this->memory_.SetData32(0x1408, 0x30f8);
+  this->memory_.SetData32(0x140c, 0);
+  this->memory_.SetData16(0x1410, 0);
+
+  // FDE 32 information.
+  this->memory_.SetData32(0x1500, 0xfc);
+  this->memory_.SetData32(0x1504, 0x204);
+  this->memory_.SetData32(0x1508, 0x2ff8);
+  this->memory_.SetData32(0x150c, 0x200);
+  this->memory_.SetData16(0x1510, 0);
+
+  ASSERT_TRUE(this->eh_frame_->EhFrameInit(0x1300, 0x300, 0));
+  ASSERT_TRUE(this->eh_frame_->Init(0x1000, 0x100, 0));
+
+  const DwarfFde* fde = this->eh_frame_->GetFdeFromPc(0x4600);
+  ASSERT_TRUE(fde != nullptr);
+  EXPECT_EQ(0x4500U, fde->pc_start);
+  EXPECT_EQ(0x4700U, fde->pc_end);
+}
+
+TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdes_with_empty_fde) {
+  this->memory_.SetMemory(0x1000, std::vector<uint8_t>{0x1, DW_EH_PE_udata2, DW_EH_PE_udata4,
+                                                       DW_EH_PE_pcrel | DW_EH_PE_sdata4});
+  this->memory_.SetData16(0x1004, 0x500);
+  this->memory_.SetData32(0x1006, 1);
+  this->memory_.SetData32(0x100a, 0x2500);
+  this->memory_.SetData32(0x100e, 0x1400);
+
+  // CIE 32 information.
+  this->memory_.SetData32(0x1300, 0xfc);
+  this->memory_.SetData32(0x1304, 0);
+  this->memory_.SetMemory(0x1308, std::vector<uint8_t>{1, 'z', 'R', '\0', 0, 0, 0, 0, 0x1b});
+
+  // FDE 32 information.
+  this->memory_.SetData32(0x1400, 0xfc);
+  this->memory_.SetData32(0x1404, 0x104);
+  this->memory_.SetData32(0x1408, 0x30f8);
+  this->memory_.SetData32(0x140c, 0);
+  this->memory_.SetData16(0x1410, 0);
+
+  // FDE 32 information.
+  this->memory_.SetData32(0x1500, 0xfc);
+  this->memory_.SetData32(0x1504, 0x204);
+  this->memory_.SetData32(0x1508, 0x2ff8);
+  this->memory_.SetData32(0x150c, 0x200);
+  this->memory_.SetData16(0x1510, 0);
+
+  ASSERT_TRUE(this->eh_frame_->EhFrameInit(0x1300, 0x300, 0));
+  ASSERT_TRUE(this->eh_frame_->Init(0x1000, 0x100, 0));
+
+  std::vector<const DwarfFde*> fdes;
+  this->eh_frame_->GetFdes(&fdes);
+  ASSERT_FALSE(fdes.empty());
+  ASSERT_EQ(1U, fdes.size());
+  EXPECT_EQ(0x4500U, fdes[0]->pc_start);
+  EXPECT_EQ(0x4700U, fdes[0]->pc_end);
+}
+
 TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdes) {
   this->memory_.SetMemory(
       0x1000, std::vector<uint8_t>{1, DW_EH_PE_udata2, DW_EH_PE_udata4, DW_EH_PE_sdata4});
@@ -220,7 +316,7 @@
 TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdeInfoFromIndex_expect_cache_fail) {
   this->eh_frame_->TestSetTableEntrySize(0x10);
   this->eh_frame_->TestSetTableEncoding(DW_EH_PE_udata4);
-  this->eh_frame_->TestSetEntriesOffset(0x1000);
+  this->eh_frame_->TestSetHdrEntriesOffset(0x1000);
 
   ASSERT_TRUE(this->eh_frame_->GetFdeInfoFromIndex(0) == nullptr);
   ASSERT_EQ(DWARF_ERROR_MEMORY_INVALID, this->eh_frame_->LastErrorCode());
@@ -233,8 +329,8 @@
 // We are assuming that pc rel, is really relative to the load_bias.
 TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdeInfoFromIndex_read_pcrel) {
   this->eh_frame_->TestSetTableEncoding(DW_EH_PE_pcrel | DW_EH_PE_udata4);
-  this->eh_frame_->TestSetEntriesOffset(0x1000);
-  this->eh_frame_->TestSetEntriesDataOffset(0x3000);
+  this->eh_frame_->TestSetHdrEntriesOffset(0x1000);
+  this->eh_frame_->TestSetHdrEntriesDataOffset(0x3000);
   this->eh_frame_->TestSetTableEntrySize(0x10);
 
   this->memory_.SetData32(0x1040, 0x340);
@@ -248,8 +344,8 @@
 
 TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdeInfoFromIndex_read_datarel) {
   this->eh_frame_->TestSetTableEncoding(DW_EH_PE_datarel | DW_EH_PE_udata4);
-  this->eh_frame_->TestSetEntriesOffset(0x1000);
-  this->eh_frame_->TestSetEntriesDataOffset(0x3000);
+  this->eh_frame_->TestSetHdrEntriesOffset(0x1000);
+  this->eh_frame_->TestSetHdrEntriesDataOffset(0x3000);
   this->eh_frame_->TestSetTableEntrySize(0x10);
 
   this->memory_.SetData32(0x1040, 0x340);
@@ -263,7 +359,7 @@
 
 TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdeInfoFromIndex_cached) {
   this->eh_frame_->TestSetTableEncoding(DW_EH_PE_udata4);
-  this->eh_frame_->TestSetEntriesOffset(0x1000);
+  this->eh_frame_->TestSetHdrEntriesOffset(0x1000);
   this->eh_frame_->TestSetTableEntrySize(0x10);
 
   this->memory_.SetData32(0x1040, 0x340);
@@ -446,7 +542,9 @@
   ASSERT_EQ(nullptr, this->eh_frame_->GetFdeFromPc(0x800));
 }
 
-REGISTER_TYPED_TEST_SUITE_P(DwarfEhFrameWithHdrTest, Init, Init_non_zero_load_bias, GetFdes,
+REGISTER_TYPED_TEST_SUITE_P(DwarfEhFrameWithHdrTest, Init, Init_non_zero_load_bias,
+                            Init_non_zero_load_bias_different_from_eh_frame_bias,
+                            GetFdeFromPc_wtih_empty_fde, GetFdes_with_empty_fde, GetFdes,
                             GetFdeInfoFromIndex_expect_cache_fail, GetFdeInfoFromIndex_read_pcrel,
                             GetFdeInfoFromIndex_read_datarel, GetFdeInfoFromIndex_cached,
                             GetFdeOffsetFromPc_verify, GetFdeOffsetFromPc_index_fail,
diff --git a/libunwindstack/tests/DwarfSectionImplTest.cpp b/libunwindstack/tests/DwarfSectionImplTest.cpp
index b386ef4..a9d6dad 100644
--- a/libunwindstack/tests/DwarfSectionImplTest.cpp
+++ b/libunwindstack/tests/DwarfSectionImplTest.cpp
@@ -35,7 +35,7 @@
   TestDwarfSectionImpl(Memory* memory) : DwarfSectionImpl<TypeParam>(memory) {}
   virtual ~TestDwarfSectionImpl() = default;
 
-  bool Init(uint64_t, uint64_t, uint64_t) override { return false; }
+  bool Init(uint64_t, uint64_t, int64_t) override { return false; }
 
   void GetFdes(std::vector<const DwarfFde*>*) override {}
 
diff --git a/libunwindstack/tests/DwarfSectionTest.cpp b/libunwindstack/tests/DwarfSectionTest.cpp
index d754fcc..953dc75 100644
--- a/libunwindstack/tests/DwarfSectionTest.cpp
+++ b/libunwindstack/tests/DwarfSectionTest.cpp
@@ -30,23 +30,24 @@
   MockDwarfSection(Memory* memory) : DwarfSection(memory) {}
   virtual ~MockDwarfSection() = default;
 
-  MOCK_METHOD3(Init, bool(uint64_t, uint64_t, uint64_t));
+  MOCK_METHOD(bool, Init, (uint64_t, uint64_t, int64_t), (override));
 
-  MOCK_METHOD5(Eval, bool(const DwarfCie*, Memory*, const dwarf_loc_regs_t&, Regs*, bool*));
+  MOCK_METHOD(bool, Eval, (const DwarfCie*, Memory*, const dwarf_loc_regs_t&, Regs*, bool*),
+              (override));
 
-  MOCK_METHOD3(Log, bool(uint8_t, uint64_t, const DwarfFde*));
+  MOCK_METHOD(bool, Log, (uint8_t, uint64_t, const DwarfFde*), (override));
 
-  MOCK_METHOD1(GetFdes, void(std::vector<const DwarfFde*>*));
+  MOCK_METHOD(void, GetFdes, (std::vector<const DwarfFde*>*), (override));
 
-  MOCK_METHOD1(GetFdeFromPc, const DwarfFde*(uint64_t));
+  MOCK_METHOD(const DwarfFde*, GetFdeFromPc, (uint64_t), (override));
 
-  MOCK_METHOD3(GetCfaLocationInfo, bool(uint64_t, const DwarfFde*, dwarf_loc_regs_t*));
+  MOCK_METHOD(bool, GetCfaLocationInfo, (uint64_t, const DwarfFde*, dwarf_loc_regs_t*), (override));
 
-  MOCK_METHOD1(GetCieOffsetFromFde32, uint64_t(uint32_t));
+  MOCK_METHOD(uint64_t, GetCieOffsetFromFde32, (uint32_t), (override));
 
-  MOCK_METHOD1(GetCieOffsetFromFde64, uint64_t(uint64_t));
+  MOCK_METHOD(uint64_t, GetCieOffsetFromFde64, (uint64_t), (override));
 
-  MOCK_METHOD1(AdjustPcFromFde, uint64_t(uint64_t));
+  MOCK_METHOD(uint64_t, AdjustPcFromFde, (uint64_t), (override));
 };
 
 class DwarfSectionTest : public ::testing::Test {
diff --git a/libunwindstack/tests/ElfFake.h b/libunwindstack/tests/ElfFake.h
index bd3083c..c33908d 100644
--- a/libunwindstack/tests/ElfFake.h
+++ b/libunwindstack/tests/ElfFake.h
@@ -66,8 +66,8 @@
   ElfInterfaceFake(Memory* memory) : ElfInterface(memory) {}
   virtual ~ElfInterfaceFake() = default;
 
-  bool Init(uint64_t*) override { return false; }
-  void InitHeaders(uint64_t) override {}
+  bool Init(int64_t*) override { return false; }
+  void InitHeaders() override {}
   std::string GetSoname() override { return fake_soname_; }
 
   bool GetFunctionName(uint64_t, std::string*, uint64_t*) override;
@@ -97,6 +97,14 @@
 
   void FakeSetErrorAddress(uint64_t address) { last_error_.address = address; }
 
+  void FakeSetDataOffset(uint64_t offset) { data_offset_ = offset; }
+  void FakeSetDataVaddrStart(uint64_t vaddr) { data_vaddr_start_ = vaddr; }
+  void FakeSetDataVaddrEnd(uint64_t vaddr) { data_vaddr_end_ = vaddr; }
+
+  void FakeSetDynamicOffset(uint64_t offset) { dynamic_offset_ = offset; }
+  void FakeSetDynamicVaddrStart(uint64_t vaddr) { dynamic_vaddr_start_ = vaddr; }
+  void FakeSetDynamicVaddrEnd(uint64_t vaddr) { dynamic_vaddr_end_ = vaddr; }
+
  private:
   std::unordered_map<std::string, uint64_t> globals_;
   std::string fake_build_id_;
diff --git a/libunwindstack/tests/ElfInterfaceTest.cpp b/libunwindstack/tests/ElfInterfaceTest.cpp
index f9ee9eb..ea27e3e 100644
--- a/libunwindstack/tests/ElfInterfaceTest.cpp
+++ b/libunwindstack/tests/ElfInterfaceTest.cpp
@@ -112,6 +112,21 @@
   template <typename Ehdr, typename Shdr, typename ElfInterfaceType>
   void InitSectionHeadersOffsets();
 
+  template <typename Ehdr, typename Shdr, typename ElfInterfaceType>
+  void InitSectionHeadersOffsetsEhFrameSectionBias(uint64_t addr, uint64_t offset,
+                                                   int64_t expected_bias);
+
+  template <typename Ehdr, typename Shdr, typename ElfInterfaceType>
+  void InitSectionHeadersOffsetsEhFrameHdrSectionBias(uint64_t addr, uint64_t offset,
+                                                      int64_t expected_bias);
+
+  template <typename Ehdr, typename Shdr, typename ElfInterfaceType>
+  void InitSectionHeadersOffsetsDebugFrameSectionBias(uint64_t addr, uint64_t offset,
+                                                      int64_t expected_bias);
+
+  template <typename Ehdr, typename Phdr, typename ElfInterfaceType>
+  void CheckGnuEhFrame(uint64_t addr, uint64_t offset, int64_t expected_bias);
+
   template <typename Sym>
   void InitSym(uint64_t offset, uint32_t value, uint32_t size, uint32_t name_offset,
                uint64_t sym_offset, const char* name);
@@ -131,6 +146,12 @@
   template <typename Ehdr, typename Shdr, typename Nhdr, typename ElfInterfaceType>
   void BuildIDSectionTooSmallForHeader();
 
+  template <typename Ehdr, typename Phdr, typename ElfInterfaceType>
+  void CheckLoadBiasInFirstPhdr(int64_t load_bias);
+
+  template <typename Ehdr, typename Phdr, typename ElfInterfaceType>
+  void CheckLoadBiasInFirstExecPhdr(uint64_t offset, uint64_t vaddr, int64_t load_bias);
+
   MemoryFake memory_;
 };
 
@@ -166,9 +187,9 @@
   phdr.p_align = 0x1000;
   memory_.SetMemory(0x100, &phdr, sizeof(phdr));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0x2000U, load_bias);
+  EXPECT_EQ(0x2000, load_bias);
 
   const std::unordered_map<uint64_t, LoadInfo>& pt_loads = elf->pt_loads();
   ASSERT_EQ(1U, pt_loads.size());
@@ -178,11 +199,11 @@
   ASSERT_EQ(0x10000U, load_data.table_size);
 }
 
-TEST_F(ElfInterfaceTest, elf32_single_pt_load) {
+TEST_F(ElfInterfaceTest, single_pt_load_32) {
   SinglePtLoad<Elf32_Ehdr, Elf32_Phdr, Elf32_Dyn, ElfInterface32>();
 }
 
-TEST_F(ElfInterfaceTest, elf64_single_pt_load) {
+TEST_F(ElfInterfaceTest, single_pt_load_64) {
   SinglePtLoad<Elf64_Ehdr, Elf64_Phdr, Elf64_Dyn, ElfInterface64>();
 }
 
@@ -222,9 +243,9 @@
   phdr.p_align = 0x1002;
   memory_.SetMemory(0x100 + 2 * sizeof(phdr), &phdr, sizeof(phdr));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0x2000U, load_bias);
+  EXPECT_EQ(0x2000, load_bias);
 
   const std::unordered_map<uint64_t, LoadInfo>& pt_loads = elf->pt_loads();
   ASSERT_EQ(3U, pt_loads.size());
@@ -245,11 +266,11 @@
   ASSERT_EQ(0x10002U, load_data.table_size);
 }
 
-TEST_F(ElfInterfaceTest, elf32_multiple_executable_pt_loads) {
+TEST_F(ElfInterfaceTest, multiple_executable_pt_loads_32) {
   MultipleExecutablePtLoads<Elf32_Ehdr, Elf32_Phdr, Elf32_Dyn, ElfInterface32>();
 }
 
-TEST_F(ElfInterfaceTest, elf64_multiple_executable_pt_loads) {
+TEST_F(ElfInterfaceTest, multiple_executable_pt_loads_64) {
   MultipleExecutablePtLoads<Elf64_Ehdr, Elf64_Phdr, Elf64_Dyn, ElfInterface64>();
 }
 
@@ -289,9 +310,9 @@
   phdr.p_align = 0x1002;
   memory_.SetMemory(0x100 + 2 * (sizeof(phdr) + 100), &phdr, sizeof(phdr));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0x2000U, load_bias);
+  EXPECT_EQ(0x2000, load_bias);
 
   const std::unordered_map<uint64_t, LoadInfo>& pt_loads = elf->pt_loads();
   ASSERT_EQ(3U, pt_loads.size());
@@ -312,12 +333,12 @@
   ASSERT_EQ(0x10002U, load_data.table_size);
 }
 
-TEST_F(ElfInterfaceTest, elf32_multiple_executable_pt_loads_increments_not_size_of_phdr) {
+TEST_F(ElfInterfaceTest, multiple_executable_pt_loads_increments_not_size_of_phdr_32) {
   MultipleExecutablePtLoadsIncrementsNotSizeOfPhdr<Elf32_Ehdr, Elf32_Phdr, Elf32_Dyn,
                                                    ElfInterface32>();
 }
 
-TEST_F(ElfInterfaceTest, elf64_multiple_executable_pt_loads_increments_not_size_of_phdr) {
+TEST_F(ElfInterfaceTest, multiple_executable_pt_loads_increments_not_size_of_phdr_64) {
   MultipleExecutablePtLoadsIncrementsNotSizeOfPhdr<Elf64_Ehdr, Elf64_Phdr, Elf64_Dyn,
                                                    ElfInterface64>();
 }
@@ -358,9 +379,9 @@
   phdr.p_align = 0x1002;
   memory_.SetMemory(0x100 + 2 * sizeof(phdr), &phdr, sizeof(phdr));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0x1001U, load_bias);
+  EXPECT_EQ(0x1001, load_bias);
 
   const std::unordered_map<uint64_t, LoadInfo>& pt_loads = elf->pt_loads();
   ASSERT_EQ(1U, pt_loads.size());
@@ -371,11 +392,11 @@
   ASSERT_EQ(0x10001U, load_data.table_size);
 }
 
-TEST_F(ElfInterfaceTest, elf32_non_executable_pt_loads) {
+TEST_F(ElfInterfaceTest, non_executable_pt_loads_32) {
   NonExecutablePtLoads<Elf32_Ehdr, Elf32_Phdr, Elf32_Dyn, ElfInterface32>();
 }
 
-TEST_F(ElfInterfaceTest, elf64_non_executable_pt_loads) {
+TEST_F(ElfInterfaceTest, non_executable_pt_loads_64) {
   NonExecutablePtLoads<Elf64_Ehdr, Elf64_Phdr, Elf64_Dyn, ElfInterface64>();
 }
 
@@ -428,11 +449,10 @@
   memset(&phdr, 0, sizeof(phdr));
   phdr.p_type = PT_GNU_EH_FRAME;
   memory_.SetMemory(phdr_offset, &phdr, sizeof(phdr));
-  phdr_offset += sizeof(phdr);
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0x2000U, load_bias);
+  EXPECT_EQ(0x2000, load_bias);
 
   const std::unordered_map<uint64_t, LoadInfo>& pt_loads = elf->pt_loads();
   ASSERT_EQ(1U, pt_loads.size());
@@ -443,15 +463,15 @@
   ASSERT_EQ(0x10000U, load_data.table_size);
 }
 
-TEST_F(ElfInterfaceTest, elf32_many_phdrs) {
+TEST_F(ElfInterfaceTest, many_phdrs_32) {
   ElfInterfaceTest::ManyPhdrs<Elf32_Ehdr, Elf32_Phdr, Elf32_Dyn, ElfInterface32>();
 }
 
-TEST_F(ElfInterfaceTest, elf64_many_phdrs) {
+TEST_F(ElfInterfaceTest, many_phdrs_64) {
   ElfInterfaceTest::ManyPhdrs<Elf64_Ehdr, Elf64_Phdr, Elf64_Dyn, ElfInterface64>();
 }
 
-TEST_F(ElfInterfaceTest, elf32_arm) {
+TEST_F(ElfInterfaceTest, arm32) {
   ElfInterfaceArm elf_arm(&memory_);
 
   Elf32_Ehdr ehdr = {};
@@ -470,9 +490,9 @@
   memory_.SetData32(0x2000, 0x1000);
   memory_.SetData32(0x2008, 0x1000);
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf_arm.Init(&load_bias));
-  EXPECT_EQ(0U, load_bias);
+  EXPECT_EQ(0, load_bias);
 
   std::vector<uint32_t> entries;
   for (auto addr : elf_arm) {
@@ -551,19 +571,19 @@
 void ElfInterfaceTest::Soname() {
   std::unique_ptr<ElfInterface> elf(new ElfInterfaceType(&memory_));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0U, load_bias);
+  EXPECT_EQ(0, load_bias);
 
   ASSERT_EQ("fake_soname.so", elf->GetSoname());
 }
 
-TEST_F(ElfInterfaceTest, elf32_soname) {
+TEST_F(ElfInterfaceTest, soname_32) {
   SonameInit<Elf32_Ehdr, Elf32_Phdr, Elf32_Shdr, Elf32_Dyn>();
   Soname<ElfInterface32>();
 }
 
-TEST_F(ElfInterfaceTest, elf64_soname) {
+TEST_F(ElfInterfaceTest, soname_64) {
   SonameInit<Elf64_Ehdr, Elf64_Phdr, Elf64_Shdr, Elf64_Dyn>();
   Soname<ElfInterface64>();
 }
@@ -572,19 +592,19 @@
 void ElfInterfaceTest::SonameAfterDtNull() {
   std::unique_ptr<ElfInterface> elf(new ElfInterfaceType(&memory_));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0U, load_bias);
+  EXPECT_EQ(0, load_bias);
 
   ASSERT_EQ("", elf->GetSoname());
 }
 
-TEST_F(ElfInterfaceTest, elf32_soname_after_dt_null) {
+TEST_F(ElfInterfaceTest, soname_after_dt_null_32) {
   SonameInit<Elf32_Ehdr, Elf32_Phdr, Elf32_Shdr, Elf32_Dyn>(SONAME_DTNULL_AFTER);
   SonameAfterDtNull<ElfInterface32>();
 }
 
-TEST_F(ElfInterfaceTest, elf64_soname_after_dt_null) {
+TEST_F(ElfInterfaceTest, soname_after_dt_null_64) {
   SonameInit<Elf64_Ehdr, Elf64_Phdr, Elf64_Shdr, Elf64_Dyn>(SONAME_DTNULL_AFTER);
   SonameAfterDtNull<ElfInterface64>();
 }
@@ -593,19 +613,19 @@
 void ElfInterfaceTest::SonameSize() {
   std::unique_ptr<ElfInterface> elf(new ElfInterfaceType(&memory_));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0U, load_bias);
+  EXPECT_EQ(0, load_bias);
 
   ASSERT_EQ("", elf->GetSoname());
 }
 
-TEST_F(ElfInterfaceTest, elf32_soname_size) {
+TEST_F(ElfInterfaceTest, soname_size_32) {
   SonameInit<Elf32_Ehdr, Elf32_Phdr, Elf32_Shdr, Elf32_Dyn>(SONAME_DTSIZE_SMALL);
   SonameSize<ElfInterface32>();
 }
 
-TEST_F(ElfInterfaceTest, elf64_soname_size) {
+TEST_F(ElfInterfaceTest, soname_size_64) {
   SonameInit<Elf64_Ehdr, Elf64_Phdr, Elf64_Shdr, Elf64_Dyn>(SONAME_DTSIZE_SMALL);
   SonameSize<ElfInterface64>();
 }
@@ -616,19 +636,19 @@
 void ElfInterfaceTest::SonameMissingMap() {
   std::unique_ptr<ElfInterface> elf(new ElfInterfaceType(&memory_));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0U, load_bias);
+  EXPECT_EQ(0, load_bias);
 
   ASSERT_EQ("", elf->GetSoname());
 }
 
-TEST_F(ElfInterfaceTest, elf32_soname_missing_map) {
+TEST_F(ElfInterfaceTest, soname_missing_map_32) {
   SonameInit<Elf32_Ehdr, Elf32_Phdr, Elf32_Shdr, Elf32_Dyn>(SONAME_MISSING_MAP);
   SonameMissingMap<ElfInterface32>();
 }
 
-TEST_F(ElfInterfaceTest, elf64_soname_missing_map) {
+TEST_F(ElfInterfaceTest, soname_missing_map_64) {
   SonameInit<Elf64_Ehdr, Elf64_Phdr, Elf64_Shdr, Elf64_Dyn>(SONAME_MISSING_MAP);
   SonameMissingMap<ElfInterface64>();
 }
@@ -647,17 +667,17 @@
   memory_.SetData32(0x10004, 0x500);
   memory_.SetData32(0x10008, 250);
 
-  elf.InitHeaders(0);
+  elf.InitHeaders();
 
   EXPECT_FALSE(elf.eh_frame() == nullptr);
   EXPECT_TRUE(elf.debug_frame() == nullptr);
 }
 
-TEST_F(ElfInterfaceTest, init_headers_eh_frame32) {
+TEST_F(ElfInterfaceTest, init_headers_eh_frame_32) {
   InitHeadersEhFrameTest<ElfInterface32Fake>();
 }
 
-TEST_F(ElfInterfaceTest, init_headers_eh_frame64) {
+TEST_F(ElfInterfaceTest, init_headers_eh_frame_64) {
   InitHeadersEhFrameTest<ElfInterface64Fake>();
 }
 
@@ -679,17 +699,17 @@
   memory_.SetData32(0x5108, 0x1500);
   memory_.SetData32(0x510c, 0x200);
 
-  elf.InitHeaders(0);
+  elf.InitHeaders();
 
   EXPECT_TRUE(elf.eh_frame() == nullptr);
   EXPECT_FALSE(elf.debug_frame() == nullptr);
 }
 
-TEST_F(ElfInterfaceTest, init_headers_debug_frame32) {
+TEST_F(ElfInterfaceTest, init_headers_debug_frame_32) {
   InitHeadersDebugFrame<ElfInterface32Fake>();
 }
 
-TEST_F(ElfInterfaceTest, init_headers_debug_frame64) {
+TEST_F(ElfInterfaceTest, init_headers_debug_frame_64) {
   InitHeadersDebugFrame<ElfInterface64Fake>();
 }
 
@@ -703,16 +723,16 @@
   ehdr.e_phentsize = sizeof(Phdr);
   memory_.SetMemory(0, &ehdr, sizeof(ehdr));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0U, load_bias);
+  EXPECT_EQ(0, load_bias);
 }
 
-TEST_F(ElfInterfaceTest, init_program_headers_malformed32) {
+TEST_F(ElfInterfaceTest, init_program_headers_malformed_32) {
   InitProgramHeadersMalformed<Elf32_Ehdr, Elf32_Phdr, ElfInterface32>();
 }
 
-TEST_F(ElfInterfaceTest, init_program_headers_malformed64) {
+TEST_F(ElfInterfaceTest, init_program_headers_malformed_64) {
   InitProgramHeadersMalformed<Elf64_Ehdr, Elf64_Phdr, ElfInterface64>();
 }
 
@@ -726,16 +746,16 @@
   ehdr.e_shentsize = sizeof(Shdr);
   memory_.SetMemory(0, &ehdr, sizeof(ehdr));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0U, load_bias);
+  EXPECT_EQ(0, load_bias);
 }
 
-TEST_F(ElfInterfaceTest, init_section_headers_malformed32) {
+TEST_F(ElfInterfaceTest, init_section_headers_malformed_32) {
   InitSectionHeadersMalformed<Elf32_Ehdr, Elf32_Shdr, ElfInterface32>();
 }
 
-TEST_F(ElfInterfaceTest, init_section_headers_malformed64) {
+TEST_F(ElfInterfaceTest, init_section_headers_malformed_64) {
   InitSectionHeadersMalformed<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>();
 }
 
@@ -790,11 +810,10 @@
   shdr.sh_offset = 0xf000;
   shdr.sh_size = 0x1000;
   memory_.SetMemory(offset, &shdr, sizeof(shdr));
-  offset += ehdr.e_shentsize;
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0U, load_bias);
+  EXPECT_EQ(0, load_bias);
   EXPECT_EQ(0U, elf->debug_frame_offset());
   EXPECT_EQ(0U, elf->debug_frame_size());
   EXPECT_EQ(0U, elf->gnu_debugdata_offset());
@@ -805,11 +824,11 @@
   ASSERT_FALSE(elf->GetFunctionName(0x90010, &name, &name_offset));
 }
 
-TEST_F(ElfInterfaceTest, init_section_headers_malformed_symdata32) {
+TEST_F(ElfInterfaceTest, init_section_headers_malformed_symdata_32) {
   InitSectionHeadersMalformedSymData<Elf32_Ehdr, Elf32_Shdr, ElfInterface32>();
 }
 
-TEST_F(ElfInterfaceTest, init_section_headers_malformed_symdata64) {
+TEST_F(ElfInterfaceTest, init_section_headers_malformed_symdata_64) {
   InitSectionHeadersMalformedSymData<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>();
 }
 
@@ -860,14 +879,13 @@
   shdr.sh_offset = 0xf000;
   shdr.sh_size = 0x1000;
   memory_.SetMemory(offset, &shdr, sizeof(shdr));
-  offset += ehdr.e_shentsize;
 
   InitSym<Sym>(0x5000, 0x90000, 0x1000, 0x100, 0xf000, "function_one");
   InitSym<Sym>(0x6000, 0xd0000, 0x1000, 0x300, 0xf000, "function_two");
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0U, load_bias);
+  EXPECT_EQ(0, load_bias);
   EXPECT_EQ(0U, elf->debug_frame_offset());
   EXPECT_EQ(0U, elf->debug_frame_size());
   EXPECT_EQ(0U, elf->gnu_debugdata_offset());
@@ -884,19 +902,19 @@
   EXPECT_EQ(32U, name_offset);
 }
 
-TEST_F(ElfInterfaceTest, init_section_headers32) {
+TEST_F(ElfInterfaceTest, init_section_headers_32) {
   InitSectionHeaders<Elf32_Ehdr, Elf32_Shdr, Elf32_Sym, ElfInterface32>(sizeof(Elf32_Shdr));
 }
 
-TEST_F(ElfInterfaceTest, init_section_headers64) {
+TEST_F(ElfInterfaceTest, init_section_headers_64) {
   InitSectionHeaders<Elf64_Ehdr, Elf64_Shdr, Elf64_Sym, ElfInterface64>(sizeof(Elf64_Shdr));
 }
 
-TEST_F(ElfInterfaceTest, init_section_headers_non_std_entry_size32) {
+TEST_F(ElfInterfaceTest, init_section_headers_non_std_entry_size_32) {
   InitSectionHeaders<Elf32_Ehdr, Elf32_Shdr, Elf32_Sym, ElfInterface32>(0x100);
 }
 
-TEST_F(ElfInterfaceTest, init_section_headers_non_std_entry_size64) {
+TEST_F(ElfInterfaceTest, init_section_headers_non_std_entry_size_64) {
   InitSectionHeaders<Elf64_Ehdr, Elf64_Shdr, Elf64_Sym, ElfInterface64>(0x100);
 }
 
@@ -961,7 +979,7 @@
   shdr.sh_type = SHT_PROGBITS;
   shdr.sh_link = 2;
   shdr.sh_name = 0x400;
-  shdr.sh_addr = 0x6000;
+  shdr.sh_addr = 0xa000;
   shdr.sh_offset = 0xa000;
   shdr.sh_entsize = 0x100;
   shdr.sh_size = 0xf00;
@@ -971,10 +989,10 @@
   memset(&shdr, 0, sizeof(shdr));
   shdr.sh_type = SHT_NOTE;
   shdr.sh_name = 0x500;
+  shdr.sh_addr = 0xb000;
   shdr.sh_offset = 0xb000;
   shdr.sh_size = 0xf00;
   memory_.SetMemory(offset, &shdr, sizeof(shdr));
-  offset += ehdr.e_shentsize;
 
   memory_.SetMemory(0xf100, ".debug_frame", sizeof(".debug_frame"));
   memory_.SetMemory(0xf200, ".gnu_debugdata", sizeof(".gnu_debugdata"));
@@ -982,29 +1000,352 @@
   memory_.SetMemory(0xf400, ".eh_frame_hdr", sizeof(".eh_frame_hdr"));
   memory_.SetMemory(0xf500, ".note.gnu.build-id", sizeof(".note.gnu.build-id"));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0U, load_bias);
+  EXPECT_EQ(0, load_bias);
   EXPECT_EQ(0x6000U, elf->debug_frame_offset());
+  EXPECT_EQ(0, elf->debug_frame_section_bias());
   EXPECT_EQ(0x500U, elf->debug_frame_size());
+
   EXPECT_EQ(0x5000U, elf->gnu_debugdata_offset());
   EXPECT_EQ(0x800U, elf->gnu_debugdata_size());
+
   EXPECT_EQ(0x7000U, elf->eh_frame_offset());
+  EXPECT_EQ(0, elf->eh_frame_section_bias());
   EXPECT_EQ(0x800U, elf->eh_frame_size());
+
   EXPECT_EQ(0xa000U, elf->eh_frame_hdr_offset());
+  EXPECT_EQ(0, elf->eh_frame_hdr_section_bias());
   EXPECT_EQ(0xf00U, elf->eh_frame_hdr_size());
+
   EXPECT_EQ(0xb000U, elf->gnu_build_id_offset());
   EXPECT_EQ(0xf00U, elf->gnu_build_id_size());
 }
 
-TEST_F(ElfInterfaceTest, init_section_headers_offsets32) {
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_32) {
   InitSectionHeadersOffsets<Elf32_Ehdr, Elf32_Shdr, ElfInterface32>();
 }
 
-TEST_F(ElfInterfaceTest, init_section_headers_offsets64) {
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_64) {
   InitSectionHeadersOffsets<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>();
 }
 
+template <typename Ehdr, typename Shdr, typename ElfInterfaceType>
+void ElfInterfaceTest::InitSectionHeadersOffsetsEhFrameSectionBias(uint64_t addr, uint64_t offset,
+                                                                   int64_t expected_bias) {
+  std::unique_ptr<ElfInterfaceType> elf(new ElfInterfaceType(&memory_));
+
+  uint64_t elf_offset = 0x2000;
+
+  Ehdr ehdr = {};
+  ehdr.e_shoff = elf_offset;
+  ehdr.e_shnum = 4;
+  ehdr.e_shentsize = sizeof(Shdr);
+  ehdr.e_shstrndx = 2;
+  memory_.SetMemory(0, &ehdr, sizeof(ehdr));
+
+  elf_offset += ehdr.e_shentsize;
+
+  Shdr shdr = {};
+  shdr.sh_type = SHT_PROGBITS;
+  shdr.sh_link = 2;
+  shdr.sh_name = 0x200;
+  shdr.sh_addr = 0x8000;
+  shdr.sh_offset = 0x8000;
+  shdr.sh_entsize = 0x100;
+  shdr.sh_size = 0x800;
+  memory_.SetMemory(elf_offset, &shdr, sizeof(shdr));
+  elf_offset += ehdr.e_shentsize;
+
+  // The string data for section header names.
+  memset(&shdr, 0, sizeof(shdr));
+  shdr.sh_type = SHT_STRTAB;
+  shdr.sh_name = 0x20000;
+  shdr.sh_offset = 0xf000;
+  shdr.sh_size = 0x1000;
+  memory_.SetMemory(elf_offset, &shdr, sizeof(shdr));
+  elf_offset += ehdr.e_shentsize;
+
+  memset(&shdr, 0, sizeof(shdr));
+  shdr.sh_type = SHT_PROGBITS;
+  shdr.sh_link = 2;
+  shdr.sh_name = 0x100;
+  shdr.sh_addr = addr;
+  shdr.sh_offset = offset;
+  shdr.sh_entsize = 0x100;
+  shdr.sh_size = 0x500;
+  memory_.SetMemory(elf_offset, &shdr, sizeof(shdr));
+
+  memory_.SetMemory(0xf100, ".eh_frame", sizeof(".eh_frame"));
+  memory_.SetMemory(0xf200, ".eh_frame_hdr", sizeof(".eh_frame_hdr"));
+
+  int64_t load_bias = 0;
+  ASSERT_TRUE(elf->Init(&load_bias));
+  EXPECT_EQ(0, load_bias);
+  EXPECT_EQ(offset, elf->eh_frame_offset());
+  EXPECT_EQ(expected_bias, elf->eh_frame_section_bias());
+  EXPECT_EQ(0x500U, elf->eh_frame_size());
+
+  EXPECT_EQ(0x8000U, elf->eh_frame_hdr_offset());
+  EXPECT_EQ(0, elf->eh_frame_hdr_section_bias());
+  EXPECT_EQ(0x800U, elf->eh_frame_hdr_size());
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_eh_frame_section_bias_zero_32) {
+  InitSectionHeadersOffsetsEhFrameSectionBias<Elf32_Ehdr, Elf32_Shdr, ElfInterface32>(0x4000,
+                                                                                      0x4000, 0);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_eh_frame_section_bias_zero_64) {
+  InitSectionHeadersOffsetsEhFrameSectionBias<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>(0x6000,
+                                                                                      0x6000, 0);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_eh_frame_section_bias_positive_32) {
+  InitSectionHeadersOffsetsEhFrameSectionBias<Elf32_Ehdr, Elf32_Shdr, ElfInterface32>(
+      0x5000, 0x4000, 0x1000);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_eh_frame_section_bias_positive_64) {
+  InitSectionHeadersOffsetsEhFrameSectionBias<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>(
+      0x6000, 0x4000, 0x2000);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_eh_frame_section_bias_negative_32) {
+  InitSectionHeadersOffsetsEhFrameSectionBias<Elf32_Ehdr, Elf32_Shdr, ElfInterface32>(
+      0x3000, 0x4000, -0x1000);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_eh_frame_section_bias_negative_64) {
+  InitSectionHeadersOffsetsEhFrameSectionBias<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>(
+      0x6000, 0x9000, -0x3000);
+}
+
+template <typename Ehdr, typename Shdr, typename ElfInterfaceType>
+void ElfInterfaceTest::InitSectionHeadersOffsetsEhFrameHdrSectionBias(uint64_t addr,
+                                                                      uint64_t offset,
+                                                                      int64_t expected_bias) {
+  std::unique_ptr<ElfInterfaceType> elf(new ElfInterfaceType(&memory_));
+
+  uint64_t elf_offset = 0x2000;
+
+  Ehdr ehdr = {};
+  ehdr.e_shoff = elf_offset;
+  ehdr.e_shnum = 4;
+  ehdr.e_shentsize = sizeof(Shdr);
+  ehdr.e_shstrndx = 2;
+  memory_.SetMemory(0, &ehdr, sizeof(ehdr));
+
+  elf_offset += ehdr.e_shentsize;
+
+  Shdr shdr = {};
+  shdr.sh_type = SHT_PROGBITS;
+  shdr.sh_link = 2;
+  shdr.sh_name = 0x200;
+  shdr.sh_addr = addr;
+  shdr.sh_offset = offset;
+  shdr.sh_entsize = 0x100;
+  shdr.sh_size = 0x800;
+  memory_.SetMemory(elf_offset, &shdr, sizeof(shdr));
+  elf_offset += ehdr.e_shentsize;
+
+  // The string data for section header names.
+  memset(&shdr, 0, sizeof(shdr));
+  shdr.sh_type = SHT_STRTAB;
+  shdr.sh_name = 0x20000;
+  shdr.sh_offset = 0xf000;
+  shdr.sh_size = 0x1000;
+  memory_.SetMemory(elf_offset, &shdr, sizeof(shdr));
+  elf_offset += ehdr.e_shentsize;
+
+  memset(&shdr, 0, sizeof(shdr));
+  shdr.sh_type = SHT_PROGBITS;
+  shdr.sh_link = 2;
+  shdr.sh_name = 0x100;
+  shdr.sh_addr = 0x5000;
+  shdr.sh_offset = 0x5000;
+  shdr.sh_entsize = 0x100;
+  shdr.sh_size = 0x500;
+  memory_.SetMemory(elf_offset, &shdr, sizeof(shdr));
+
+  memory_.SetMemory(0xf100, ".eh_frame", sizeof(".eh_frame"));
+  memory_.SetMemory(0xf200, ".eh_frame_hdr", sizeof(".eh_frame_hdr"));
+
+  int64_t load_bias = 0;
+  ASSERT_TRUE(elf->Init(&load_bias));
+  EXPECT_EQ(0, load_bias);
+  EXPECT_EQ(0x5000U, elf->eh_frame_offset());
+  EXPECT_EQ(0, elf->eh_frame_section_bias());
+  EXPECT_EQ(0x500U, elf->eh_frame_size());
+  EXPECT_EQ(offset, elf->eh_frame_hdr_offset());
+  EXPECT_EQ(expected_bias, elf->eh_frame_hdr_section_bias());
+  EXPECT_EQ(0x800U, elf->eh_frame_hdr_size());
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_eh_frame_hdr_section_bias_zero_32) {
+  InitSectionHeadersOffsetsEhFrameHdrSectionBias<Elf32_Ehdr, Elf32_Shdr, ElfInterface32>(0x9000,
+                                                                                         0x9000, 0);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_eh_frame_hdr_section_bias_zero_64) {
+  InitSectionHeadersOffsetsEhFrameHdrSectionBias<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>(0xa000,
+                                                                                         0xa000, 0);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_eh_frame_hdr_section_bias_positive_32) {
+  InitSectionHeadersOffsetsEhFrameHdrSectionBias<Elf32_Ehdr, Elf32_Shdr, ElfInterface32>(
+      0x9000, 0x4000, 0x5000);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_eh_frame_hdr_section_bias_positive_64) {
+  InitSectionHeadersOffsetsEhFrameHdrSectionBias<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>(
+      0x6000, 0x1000, 0x5000);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_eh_frame_hdr_section_bias_negative_32) {
+  InitSectionHeadersOffsetsEhFrameHdrSectionBias<Elf32_Ehdr, Elf32_Shdr, ElfInterface32>(
+      0x3000, 0x5000, -0x2000);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_eh_frame_hdr_section_bias_negative_64) {
+  InitSectionHeadersOffsetsEhFrameHdrSectionBias<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>(
+      0x5000, 0x9000, -0x4000);
+}
+
+template <typename Ehdr, typename Shdr, typename ElfInterfaceType>
+void ElfInterfaceTest::InitSectionHeadersOffsetsDebugFrameSectionBias(uint64_t addr,
+                                                                      uint64_t offset,
+                                                                      int64_t expected_bias) {
+  std::unique_ptr<ElfInterfaceType> elf(new ElfInterfaceType(&memory_));
+
+  uint64_t elf_offset = 0x2000;
+
+  Ehdr ehdr = {};
+  ehdr.e_shoff = elf_offset;
+  ehdr.e_shnum = 3;
+  ehdr.e_shentsize = sizeof(Shdr);
+  ehdr.e_shstrndx = 2;
+  memory_.SetMemory(0, &ehdr, sizeof(ehdr));
+
+  elf_offset += ehdr.e_shentsize;
+
+  Shdr shdr = {};
+  shdr.sh_type = SHT_PROGBITS;
+  shdr.sh_link = 2;
+  shdr.sh_name = 0x100;
+  shdr.sh_addr = addr;
+  shdr.sh_offset = offset;
+  shdr.sh_entsize = 0x100;
+  shdr.sh_size = 0x800;
+  memory_.SetMemory(elf_offset, &shdr, sizeof(shdr));
+  elf_offset += ehdr.e_shentsize;
+
+  // The string data for section header names.
+  memset(&shdr, 0, sizeof(shdr));
+  shdr.sh_type = SHT_STRTAB;
+  shdr.sh_name = 0x20000;
+  shdr.sh_offset = 0xf000;
+  shdr.sh_size = 0x1000;
+  memory_.SetMemory(elf_offset, &shdr, sizeof(shdr));
+
+  memory_.SetMemory(0xf100, ".debug_frame", sizeof(".debug_frame"));
+
+  int64_t load_bias = 0;
+  ASSERT_TRUE(elf->Init(&load_bias));
+  EXPECT_EQ(0, load_bias);
+  EXPECT_EQ(offset, elf->debug_frame_offset());
+  EXPECT_EQ(expected_bias, elf->debug_frame_section_bias());
+  EXPECT_EQ(0x800U, elf->debug_frame_size());
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_debug_frame_section_bias_zero_32) {
+  InitSectionHeadersOffsetsDebugFrameSectionBias<Elf32_Ehdr, Elf32_Shdr, ElfInterface32>(0x5000,
+                                                                                         0x5000, 0);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_debug_frame_section_bias_zero_64) {
+  InitSectionHeadersOffsetsDebugFrameSectionBias<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>(0xa000,
+                                                                                         0xa000, 0);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_debug_frame_section_bias_positive_32) {
+  InitSectionHeadersOffsetsDebugFrameSectionBias<Elf32_Ehdr, Elf32_Shdr, ElfInterface32>(
+      0x5000, 0x2000, 0x3000);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_debug_frame_section_bias_positive_64) {
+  InitSectionHeadersOffsetsDebugFrameSectionBias<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>(
+      0x7000, 0x1000, 0x6000);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_debug_frame_section_bias_negative_32) {
+  InitSectionHeadersOffsetsDebugFrameSectionBias<Elf32_Ehdr, Elf32_Shdr, ElfInterface32>(
+      0x6000, 0x7000, -0x1000);
+}
+
+TEST_F(ElfInterfaceTest, init_section_headers_offsets_debug_frame_section_bias_negative_64) {
+  InitSectionHeadersOffsetsDebugFrameSectionBias<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>(
+      0x3000, 0x5000, -0x2000);
+}
+
+template <typename Ehdr, typename Phdr, typename ElfInterfaceType>
+void ElfInterfaceTest::CheckGnuEhFrame(uint64_t addr, uint64_t offset, int64_t expected_bias) {
+  std::unique_ptr<ElfInterface> elf(new ElfInterfaceType(&memory_));
+
+  Ehdr ehdr = {};
+  ehdr.e_phoff = 0x100;
+  ehdr.e_phnum = 2;
+  ehdr.e_phentsize = sizeof(Phdr);
+  memory_.SetMemory(0, &ehdr, sizeof(ehdr));
+
+  uint64_t phdr_offset = 0x100;
+
+  Phdr phdr = {};
+  phdr.p_type = PT_LOAD;
+  phdr.p_memsz = 0x10000;
+  phdr.p_flags = PF_R | PF_X;
+  phdr.p_align = 0x1000;
+  memory_.SetMemory(phdr_offset, &phdr, sizeof(phdr));
+  phdr_offset += sizeof(phdr);
+
+  memset(&phdr, 0, sizeof(phdr));
+  phdr.p_type = PT_GNU_EH_FRAME;
+  phdr.p_vaddr = addr;
+  phdr.p_offset = offset;
+  memory_.SetMemory(phdr_offset, &phdr, sizeof(phdr));
+
+  int64_t load_bias = 0;
+  ASSERT_TRUE(elf->Init(&load_bias));
+  EXPECT_EQ(0, load_bias);
+  EXPECT_EQ(expected_bias, elf->eh_frame_hdr_section_bias());
+}
+
+TEST_F(ElfInterfaceTest, eh_frame_zero_section_bias_32) {
+  ElfInterfaceTest::CheckGnuEhFrame<Elf32_Ehdr, Elf32_Phdr, ElfInterface32>(0x4000, 0x4000, 0);
+}
+
+TEST_F(ElfInterfaceTest, eh_frame_zero_section_bias_64) {
+  ElfInterfaceTest::CheckGnuEhFrame<Elf64_Ehdr, Elf64_Phdr, ElfInterface64>(0x4000, 0x4000, 0);
+}
+
+TEST_F(ElfInterfaceTest, eh_frame_positive_section_bias_32) {
+  ElfInterfaceTest::CheckGnuEhFrame<Elf32_Ehdr, Elf32_Phdr, ElfInterface32>(0x4000, 0x1000, 0x3000);
+}
+
+TEST_F(ElfInterfaceTest, eh_frame_positive_section_bias_64) {
+  ElfInterfaceTest::CheckGnuEhFrame<Elf64_Ehdr, Elf64_Phdr, ElfInterface64>(0x4000, 0x1000, 0x3000);
+}
+
+TEST_F(ElfInterfaceTest, eh_frame_negative_section_bias_32) {
+  ElfInterfaceTest::CheckGnuEhFrame<Elf32_Ehdr, Elf32_Phdr, ElfInterface32>(0x4000, 0x5000,
+                                                                            -0x1000);
+}
+
+TEST_F(ElfInterfaceTest, eh_frame_negative_section_bias_64) {
+  ElfInterfaceTest::CheckGnuEhFrame<Elf64_Ehdr, Elf64_Phdr, ElfInterface64>(0x4000, 0x5000,
+                                                                            -0x1000);
+}
+
 TEST_F(ElfInterfaceTest, is_valid_pc_from_pt_load) {
   std::unique_ptr<ElfInterface> elf(new ElfInterface32(&memory_));
 
@@ -1022,9 +1363,9 @@
   phdr.p_align = 0x1000;
   memory_.SetMemory(0x100, &phdr, sizeof(phdr));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0U, load_bias);
+  EXPECT_EQ(0, load_bias);
   EXPECT_TRUE(elf->IsValidPc(0));
   EXPECT_TRUE(elf->IsValidPc(0x5000));
   EXPECT_TRUE(elf->IsValidPc(0xffff));
@@ -1048,9 +1389,9 @@
   phdr.p_align = 0x1000;
   memory_.SetMemory(0x100, &phdr, sizeof(phdr));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  EXPECT_EQ(0x2000U, load_bias);
+  EXPECT_EQ(0x2000, load_bias);
   EXPECT_FALSE(elf->IsValidPc(0));
   EXPECT_FALSE(elf->IsValidPc(0x1000));
   EXPECT_FALSE(elf->IsValidPc(0x1fff));
@@ -1105,10 +1446,10 @@
   memory_.SetData32(0x708, 0x2100);
   memory_.SetData32(0x70c, 0x200);
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  elf->InitHeaders(0);
-  EXPECT_EQ(0U, load_bias);
+  elf->InitHeaders();
+  EXPECT_EQ(0, load_bias);
   EXPECT_FALSE(elf->IsValidPc(0));
   EXPECT_FALSE(elf->IsValidPc(0x20ff));
   EXPECT_TRUE(elf->IsValidPc(0x2100));
@@ -1162,10 +1503,10 @@
   memory_.SetData32(0x708, 0x20f8);
   memory_.SetData32(0x70c, 0x200);
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  elf->InitHeaders(0);
-  EXPECT_EQ(0U, load_bias);
+  elf->InitHeaders();
+  EXPECT_EQ(0, load_bias);
   EXPECT_FALSE(elf->IsValidPc(0));
   EXPECT_FALSE(elf->IsValidPc(0x27ff));
   EXPECT_TRUE(elf->IsValidPc(0x2800));
@@ -1201,7 +1542,6 @@
   note_offset += sizeof("GNU");
   // This part of the note does not contain any trailing '\0'.
   memcpy(&note_section[note_offset], "BUILDID", 7);
-  note_offset += 8;
 
   Shdr shdr = {};
   shdr.sh_type = SHT_NOTE;
@@ -1218,16 +1558,23 @@
   shdr.sh_offset = 0xf000;
   shdr.sh_size = 0x1000;
   memory_.SetMemory(offset, &shdr, sizeof(shdr));
-  offset += ehdr.e_shentsize;
 
   memory_.SetMemory(0xf500, ".note.gnu.build-id", sizeof(".note.gnu.build-id"));
   memory_.SetMemory(0xb000, note_section, sizeof(note_section));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
   ASSERT_EQ("BUILDID", elf->GetBuildID());
 }
 
+TEST_F(ElfInterfaceTest, build_id_32) {
+  BuildID<Elf32_Ehdr, Elf32_Shdr, Elf32_Nhdr, ElfInterface32>();
+}
+
+TEST_F(ElfInterfaceTest, build_id_64) {
+  BuildID<Elf64_Ehdr, Elf64_Shdr, Elf64_Nhdr, ElfInterface64>();
+}
+
 template <typename Ehdr, typename Shdr, typename Nhdr, typename ElfInterfaceType>
 void ElfInterfaceTest::BuildIDTwoNotes() {
   std::unique_ptr<ElfInterfaceType> elf(new ElfInterfaceType(&memory_));
@@ -1266,7 +1613,6 @@
   note_offset += sizeof("GNU");
   // This part of the note does not contain any trailing '\0'.
   memcpy(&note_section[note_offset], "BUILDID", 7);
-  note_offset += 8;
 
   Shdr shdr = {};
   shdr.sh_type = SHT_NOTE;
@@ -1283,16 +1629,23 @@
   shdr.sh_offset = 0xf000;
   shdr.sh_size = 0x1000;
   memory_.SetMemory(offset, &shdr, sizeof(shdr));
-  offset += ehdr.e_shentsize;
 
   memory_.SetMemory(0xf500, ".note.gnu.build-id", sizeof(".note.gnu.build-id"));
   memory_.SetMemory(0xb000, note_section, sizeof(note_section));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
   ASSERT_EQ("BUILDID", elf->GetBuildID());
 }
 
+TEST_F(ElfInterfaceTest, build_id_two_notes_32) {
+  BuildIDTwoNotes<Elf32_Ehdr, Elf32_Shdr, Elf32_Nhdr, ElfInterface32>();
+}
+
+TEST_F(ElfInterfaceTest, build_id_two_notes_64) {
+  BuildIDTwoNotes<Elf64_Ehdr, Elf64_Shdr, Elf64_Nhdr, ElfInterface64>();
+}
+
 template <typename Ehdr, typename Shdr, typename Nhdr, typename ElfInterfaceType>
 void ElfInterfaceTest::BuildIDSectionTooSmallForName () {
   std::unique_ptr<ElfInterfaceType> elf(new ElfInterfaceType(&memory_));
@@ -1320,7 +1673,6 @@
   note_offset += sizeof("GNU");
   // This part of the note does not contain any trailing '\0'.
   memcpy(&note_section[note_offset], "BUILDID", 7);
-  note_offset += 8;
 
   Shdr shdr = {};
   shdr.sh_type = SHT_NOTE;
@@ -1337,16 +1689,23 @@
   shdr.sh_offset = 0xf000;
   shdr.sh_size = 0x1000;
   memory_.SetMemory(offset, &shdr, sizeof(shdr));
-  offset += ehdr.e_shentsize;
 
   memory_.SetMemory(0xf500, ".note.gnu.build-id", sizeof(".note.gnu.build-id"));
   memory_.SetMemory(0xb000, note_section, sizeof(note_section));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
   ASSERT_EQ("", elf->GetBuildID());
 }
 
+TEST_F(ElfInterfaceTest, build_id_section_too_small_for_name_32) {
+  BuildIDSectionTooSmallForName<Elf32_Ehdr, Elf32_Shdr, Elf32_Nhdr, ElfInterface32>();
+}
+
+TEST_F(ElfInterfaceTest, build_id_section_too_small_for_name_64) {
+  BuildIDSectionTooSmallForName<Elf64_Ehdr, Elf64_Shdr, Elf64_Nhdr, ElfInterface64>();
+}
+
 template <typename Ehdr, typename Shdr, typename Nhdr, typename ElfInterfaceType>
 void ElfInterfaceTest::BuildIDSectionTooSmallForDesc () {
   std::unique_ptr<ElfInterfaceType> elf(new ElfInterfaceType(&memory_));
@@ -1374,7 +1733,6 @@
   note_offset += sizeof("GNU");
   // This part of the note does not contain any trailing '\0'.
   memcpy(&note_section[note_offset], "BUILDID", 7);
-  note_offset += 8;
 
   Shdr shdr = {};
   shdr.sh_type = SHT_NOTE;
@@ -1391,16 +1749,23 @@
   shdr.sh_offset = 0xf000;
   shdr.sh_size = 0x1000;
   memory_.SetMemory(offset, &shdr, sizeof(shdr));
-  offset += ehdr.e_shentsize;
 
   memory_.SetMemory(0xf500, ".note.gnu.build-id", sizeof(".note.gnu.build-id"));
   memory_.SetMemory(0xb000, note_section, sizeof(note_section));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
   ASSERT_EQ("", elf->GetBuildID());
 }
 
+TEST_F(ElfInterfaceTest, build_id_section_too_small_for_desc_32) {
+  BuildIDSectionTooSmallForDesc<Elf32_Ehdr, Elf32_Shdr, Elf32_Nhdr, ElfInterface32>();
+}
+
+TEST_F(ElfInterfaceTest, build_id_section_too_small_for_desc_64) {
+  BuildIDSectionTooSmallForDesc<Elf64_Ehdr, Elf64_Shdr, Elf64_Nhdr, ElfInterface64>();
+}
+
 template <typename Ehdr, typename Shdr, typename Nhdr, typename ElfInterfaceType>
 void ElfInterfaceTest::BuildIDSectionTooSmallForHeader () {
   std::unique_ptr<ElfInterfaceType> elf(new ElfInterfaceType(&memory_));
@@ -1428,7 +1793,6 @@
   note_offset += sizeof("GNU");
   // This part of the note does not contain any trailing '\0'.
   memcpy(&note_section[note_offset], "BUILDID", 7);
-  note_offset += 8;
 
   Shdr shdr = {};
   shdr.sh_type = SHT_NOTE;
@@ -1445,54 +1809,139 @@
   shdr.sh_offset = 0xf000;
   shdr.sh_size = 0x1000;
   memory_.SetMemory(offset, &shdr, sizeof(shdr));
-  offset += ehdr.e_shentsize;
 
   memory_.SetMemory(0xf500, ".note.gnu.build-id", sizeof(".note.gnu.build-id"));
   memory_.SetMemory(0xb000, note_section, sizeof(note_section));
 
-  uint64_t load_bias = 0;
+  int64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
   ASSERT_EQ("", elf->GetBuildID());
 }
 
-TEST_F(ElfInterfaceTest, build_id32) {
-  BuildID<Elf32_Ehdr, Elf32_Shdr, Elf32_Nhdr, ElfInterface32>();
-}
-
-TEST_F(ElfInterfaceTest, build_id64) {
-  BuildID<Elf64_Ehdr, Elf64_Shdr, Elf64_Nhdr, ElfInterface64>();
-}
-
-TEST_F(ElfInterfaceTest, build_id_two_notes32) {
-  BuildIDTwoNotes<Elf32_Ehdr, Elf32_Shdr, Elf32_Nhdr, ElfInterface32>();
-}
-
-TEST_F(ElfInterfaceTest, build_id_two_notes64) {
-  BuildIDTwoNotes<Elf64_Ehdr, Elf64_Shdr, Elf64_Nhdr, ElfInterface64>();
-}
-
-TEST_F(ElfInterfaceTest, build_id_section_too_small_for_name32) {
-  BuildIDSectionTooSmallForName<Elf32_Ehdr, Elf32_Shdr, Elf32_Nhdr, ElfInterface32>();
-}
-
-TEST_F(ElfInterfaceTest, build_id_section_too_small_for_name64) {
-  BuildIDSectionTooSmallForName<Elf64_Ehdr, Elf64_Shdr, Elf64_Nhdr, ElfInterface64>();
-}
-
-TEST_F(ElfInterfaceTest, build_id_section_too_small_for_desc32) {
-  BuildIDSectionTooSmallForDesc<Elf32_Ehdr, Elf32_Shdr, Elf32_Nhdr, ElfInterface32>();
-}
-
-TEST_F(ElfInterfaceTest, build_id_section_too_small_for_desc64) {
-  BuildIDSectionTooSmallForDesc<Elf64_Ehdr, Elf64_Shdr, Elf64_Nhdr, ElfInterface64>();
-}
-
-TEST_F(ElfInterfaceTest, build_id_section_too_small_for_header32) {
+TEST_F(ElfInterfaceTest, build_id_section_too_small_for_header_32) {
   BuildIDSectionTooSmallForHeader<Elf32_Ehdr, Elf32_Shdr, Elf32_Nhdr, ElfInterface32>();
 }
 
-TEST_F(ElfInterfaceTest, build_id_section_too_small_for_header64) {
+TEST_F(ElfInterfaceTest, build_id_section_too_small_for_header_64) {
   BuildIDSectionTooSmallForHeader<Elf64_Ehdr, Elf64_Shdr, Elf64_Nhdr, ElfInterface64>();
 }
 
+template <typename Ehdr, typename Phdr, typename ElfInterfaceType>
+void ElfInterfaceTest::CheckLoadBiasInFirstPhdr(int64_t load_bias) {
+  Ehdr ehdr = {};
+  ehdr.e_phoff = 0x100;
+  ehdr.e_phnum = 2;
+  ehdr.e_phentsize = sizeof(Phdr);
+  memory_.SetMemory(0, &ehdr, sizeof(ehdr));
+
+  Phdr phdr = {};
+  phdr.p_type = PT_LOAD;
+  phdr.p_offset = 0;
+  phdr.p_vaddr = load_bias;
+  phdr.p_memsz = 0x10000;
+  phdr.p_flags = PF_R | PF_X;
+  phdr.p_align = 0x1000;
+  memory_.SetMemory(0x100, &phdr, sizeof(phdr));
+
+  memset(&phdr, 0, sizeof(phdr));
+  phdr.p_type = PT_LOAD;
+  phdr.p_offset = 0x1000;
+  phdr.p_memsz = 0x2000;
+  phdr.p_flags = PF_R | PF_X;
+  phdr.p_align = 0x1000;
+  memory_.SetMemory(0x100 + sizeof(phdr), &phdr, sizeof(phdr));
+
+  int64_t static_load_bias = ElfInterface::GetLoadBias<Ehdr, Phdr>(&memory_);
+  ASSERT_EQ(load_bias, static_load_bias);
+
+  std::unique_ptr<ElfInterfaceType> elf(new ElfInterfaceType(&memory_));
+  int64_t init_load_bias = 0;
+  ASSERT_TRUE(elf->Init(&init_load_bias));
+  ASSERT_EQ(init_load_bias, static_load_bias);
+}
+
+TEST_F(ElfInterfaceTest, get_load_bias_zero_32) {
+  CheckLoadBiasInFirstPhdr<Elf32_Ehdr, Elf32_Phdr, ElfInterface32>(0);
+}
+
+TEST_F(ElfInterfaceTest, get_load_bias_zero_64) {
+  CheckLoadBiasInFirstPhdr<Elf64_Ehdr, Elf64_Phdr, ElfInterface64>(0);
+}
+
+TEST_F(ElfInterfaceTest, get_load_bias_non_zero_32) {
+  CheckLoadBiasInFirstPhdr<Elf32_Ehdr, Elf32_Phdr, ElfInterface32>(0x1000);
+}
+
+TEST_F(ElfInterfaceTest, get_load_bias_non_zero_64) {
+  CheckLoadBiasInFirstPhdr<Elf64_Ehdr, Elf64_Phdr, ElfInterface64>(0x1000);
+}
+
+template <typename Ehdr, typename Phdr, typename ElfInterfaceType>
+void ElfInterfaceTest::CheckLoadBiasInFirstExecPhdr(uint64_t offset, uint64_t vaddr,
+                                                    int64_t load_bias) {
+  Ehdr ehdr = {};
+  ehdr.e_phoff = 0x100;
+  ehdr.e_phnum = 3;
+  ehdr.e_phentsize = sizeof(Phdr);
+  memory_.SetMemory(0, &ehdr, sizeof(ehdr));
+
+  Phdr phdr = {};
+  phdr.p_type = PT_LOAD;
+  phdr.p_memsz = 0x10000;
+  phdr.p_flags = PF_R;
+  phdr.p_align = 0x1000;
+  memory_.SetMemory(0x100, &phdr, sizeof(phdr));
+
+  memset(&phdr, 0, sizeof(phdr));
+  phdr.p_type = PT_LOAD;
+  phdr.p_offset = offset;
+  phdr.p_vaddr = vaddr;
+  phdr.p_memsz = 0x2000;
+  phdr.p_flags = PF_R | PF_X;
+  phdr.p_align = 0x1000;
+  memory_.SetMemory(0x100 + sizeof(phdr), &phdr, sizeof(phdr));
+
+  // Second executable load should be ignored for load bias computation.
+  memset(&phdr, 0, sizeof(phdr));
+  phdr.p_type = PT_LOAD;
+  phdr.p_offset = 0x1234;
+  phdr.p_vaddr = 0x2000;
+  phdr.p_memsz = 0x2000;
+  phdr.p_flags = PF_R | PF_X;
+  phdr.p_align = 0x1000;
+  memory_.SetMemory(0x200 + sizeof(phdr), &phdr, sizeof(phdr));
+
+  int64_t static_load_bias = ElfInterface::GetLoadBias<Ehdr, Phdr>(&memory_);
+  ASSERT_EQ(load_bias, static_load_bias);
+
+  std::unique_ptr<ElfInterfaceType> elf(new ElfInterfaceType(&memory_));
+  int64_t init_load_bias = 0;
+  ASSERT_TRUE(elf->Init(&init_load_bias));
+  ASSERT_EQ(init_load_bias, static_load_bias);
+}
+
+TEST_F(ElfInterfaceTest, get_load_bias_exec_zero_32) {
+  CheckLoadBiasInFirstExecPhdr<Elf32_Ehdr, Elf32_Phdr, ElfInterface32>(0x1000, 0x1000, 0);
+}
+
+TEST_F(ElfInterfaceTest, get_load_bias_exec_zero_64) {
+  CheckLoadBiasInFirstExecPhdr<Elf64_Ehdr, Elf64_Phdr, ElfInterface64>(0x1000, 0x1000, 0);
+}
+
+TEST_F(ElfInterfaceTest, get_load_bias_exec_positive_32) {
+  CheckLoadBiasInFirstExecPhdr<Elf32_Ehdr, Elf32_Phdr, ElfInterface32>(0x1000, 0x4000, 0x3000);
+}
+
+TEST_F(ElfInterfaceTest, get_load_bias_exec_positive_64) {
+  CheckLoadBiasInFirstExecPhdr<Elf64_Ehdr, Elf64_Phdr, ElfInterface64>(0x1000, 0x4000, 0x3000);
+}
+
+TEST_F(ElfInterfaceTest, get_load_bias_exec_negative_32) {
+  CheckLoadBiasInFirstExecPhdr<Elf32_Ehdr, Elf32_Phdr, ElfInterface32>(0x5000, 0x1000, -0x4000);
+}
+
+TEST_F(ElfInterfaceTest, get_load_bias_exec_negative_64) {
+  CheckLoadBiasInFirstExecPhdr<Elf64_Ehdr, Elf64_Phdr, ElfInterface64>(0x5000, 0x1000, -0x4000);
+}
+
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/ElfTest.cpp b/libunwindstack/tests/ElfTest.cpp
index c432d6d..4866345 100644
--- a/libunwindstack/tests/ElfTest.cpp
+++ b/libunwindstack/tests/ElfTest.cpp
@@ -104,6 +104,8 @@
     memory_->SetMemory(0x100, &phdr, sizeof(phdr));
   }
 
+  void VerifyStepIfSignalHandler(uint64_t load_bias);
+
   MemoryFake* memory_;
 };
 
@@ -281,7 +283,7 @@
   ASSERT_EQ(0x101U, elf.GetRelPc(0x1101, &map_info));
 }
 
-TEST_F(ElfTest, step_in_signal_map) {
+void ElfTest::VerifyStepIfSignalHandler(uint64_t load_bias) {
   ElfFake elf(memory_);
 
   RegsArm regs;
@@ -290,6 +292,7 @@
 
   ElfInterfaceFake* interface = new ElfInterfaceFake(memory_);
   elf.FakeSetInterface(interface);
+  elf.FakeSetLoadBias(load_bias);
 
   memory_->SetData32(0x3000, 0xdf0027ad);
   MemoryFake process_memory;
@@ -299,30 +302,42 @@
   }
 
   elf.FakeSetValid(true);
-  ASSERT_TRUE(elf.StepIfSignalHandler(0x3000, &regs, &process_memory));
+  ASSERT_TRUE(elf.StepIfSignalHandler(0x3000 + load_bias, &regs, &process_memory));
   EXPECT_EQ(ERROR_NONE, elf.GetLastErrorCode());
   EXPECT_EQ(15U, regs.pc());
   EXPECT_EQ(13U, regs.sp());
 }
 
+TEST_F(ElfTest, step_in_signal_map) {
+  VerifyStepIfSignalHandler(0);
+}
+
+TEST_F(ElfTest, step_in_signal_map_non_zero_load_bias) {
+  VerifyStepIfSignalHandler(0x1000);
+}
+
 class ElfInterfaceMock : public ElfInterface {
  public:
   ElfInterfaceMock(Memory* memory) : ElfInterface(memory) {}
   virtual ~ElfInterfaceMock() = default;
 
-  bool Init(uint64_t*) override { return false; }
-  void InitHeaders(uint64_t) override {}
+  bool Init(int64_t*) override { return false; }
+  void InitHeaders() override {}
   std::string GetSoname() override { return ""; }
   bool GetFunctionName(uint64_t, std::string*, uint64_t*) override { return false; }
   std::string GetBuildID() override { return ""; }
 
-  MOCK_METHOD4(Step, bool(uint64_t, Regs*, Memory*, bool*));
-  MOCK_METHOD2(GetGlobalVariable, bool(const std::string&, uint64_t*));
-  MOCK_METHOD1(IsValidPc, bool(uint64_t));
+  MOCK_METHOD(bool, Step, (uint64_t, Regs*, Memory*, bool*), (override));
+  MOCK_METHOD(bool, GetGlobalVariable, (const std::string&, uint64_t*), (override));
+  MOCK_METHOD(bool, IsValidPc, (uint64_t), (override));
+
+  void MockSetDataOffset(uint64_t offset) { data_offset_ = offset; }
+  void MockSetDataVaddrStart(uint64_t vaddr) { data_vaddr_start_ = vaddr; }
+  void MockSetDataVaddrEnd(uint64_t vaddr) { data_vaddr_end_ = vaddr; }
 
   void MockSetDynamicOffset(uint64_t offset) { dynamic_offset_ = offset; }
-  void MockSetDynamicVaddr(uint64_t vaddr) { dynamic_vaddr_ = vaddr; }
-  void MockSetDynamicSize(uint64_t size) { dynamic_size_ = size; }
+  void MockSetDynamicVaddrStart(uint64_t vaddr) { dynamic_vaddr_start_ = vaddr; }
+  void MockSetDynamicVaddrEnd(uint64_t vaddr) { dynamic_vaddr_end_ = vaddr; }
 };
 
 TEST_F(ElfTest, step_in_interface) {
@@ -348,7 +363,7 @@
 
   std::string global("something");
   uint64_t offset;
-  ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
+  ASSERT_FALSE(elf.GetGlobalVariableOffset(global, &offset));
 }
 
 TEST_F(ElfTest, get_global_valid_not_in_interface) {
@@ -358,119 +373,69 @@
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
 
-  uint64_t offset;
   std::string global("something");
-  EXPECT_CALL(*interface, GetGlobalVariable(global, &offset)).WillOnce(::testing::Return(false));
+  EXPECT_CALL(*interface, GetGlobalVariable(global, ::testing::_))
+      .WillOnce(::testing::Return(false));
 
-  ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
+  uint64_t offset;
+  ASSERT_FALSE(elf.GetGlobalVariableOffset(global, &offset));
 }
 
-TEST_F(ElfTest, get_global_valid_below_load_bias) {
+TEST_F(ElfTest, get_global_vaddr_in_no_sections) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0x1000);
 
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
 
-  uint64_t offset;
   std::string global("something");
-  EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
+  EXPECT_CALL(*interface, GetGlobalVariable(global, ::testing::_))
       .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));
 
-  ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
-}
-
-TEST_F(ElfTest, get_global_valid_dynamic_zero_non_zero_load_bias) {
-  ElfFake elf(memory_);
-  elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0x100);
-
-  ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
-  elf.FakeSetInterface(interface);
-
   uint64_t offset;
-  std::string global("something");
-  EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
-      .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));
-
-  ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
-  EXPECT_EQ(0x200U, offset);
+  ASSERT_FALSE(elf.GetGlobalVariableOffset(global, &offset));
 }
 
-TEST_F(ElfTest, get_global_valid_dynamic_zero) {
+TEST_F(ElfTest, get_global_vaddr_in_data_section) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
 
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
+  interface->MockSetDataVaddrStart(0x500);
+  interface->MockSetDataVaddrEnd(0x600);
+  interface->MockSetDataOffset(0xa000);
 
-  ElfInterfaceMock* gnu_interface = new ElfInterfaceMock(memory_);
-  elf.FakeSetGnuDebugdataInterface(gnu_interface);
+  std::string global("something");
+  EXPECT_CALL(*interface, GetGlobalVariable(global, ::testing::_))
+      .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x580), ::testing::Return(true)));
 
   uint64_t offset;
-  std::string global("something");
-  EXPECT_CALL(*interface, GetGlobalVariable(global, &offset)).WillOnce(::testing::Return(false));
-
-  EXPECT_CALL(*gnu_interface, GetGlobalVariable(global, &offset))
-      .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x500), ::testing::Return(true)));
-
-  ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
-  EXPECT_EQ(0x500U, offset);
+  ASSERT_TRUE(elf.GetGlobalVariableOffset(global, &offset));
+  EXPECT_EQ(0xa080U, offset);
 }
 
-TEST_F(ElfTest, get_global_valid_in_gnu_debugdata_dynamic_zero) {
+TEST_F(ElfTest, get_global_vaddr_in_dynamic_section) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
 
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
+  interface->MockSetDataVaddrStart(0x500);
+  interface->MockSetDataVaddrEnd(0x600);
+  interface->MockSetDataOffset(0xa000);
+
+  interface->MockSetDynamicVaddrStart(0x800);
+  interface->MockSetDynamicVaddrEnd(0x900);
+  interface->MockSetDynamicOffset(0xc000);
+
+  std::string global("something");
+  EXPECT_CALL(*interface, GetGlobalVariable(global, ::testing::_))
+      .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x880), ::testing::Return(true)));
 
   uint64_t offset;
-  std::string global("something");
-  EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
-      .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));
-
-  ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
-  EXPECT_EQ(0x300U, offset);
-}
-
-TEST_F(ElfTest, get_global_valid_dynamic_adjust_negative) {
-  ElfFake elf(memory_);
-  elf.FakeSetValid(true);
-
-  ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
-  interface->MockSetDynamicOffset(0x400);
-  interface->MockSetDynamicVaddr(0x800);
-  interface->MockSetDynamicSize(0x100);
-  elf.FakeSetInterface(interface);
-
-  uint64_t offset;
-  std::string global("something");
-  EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
-      .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x850), ::testing::Return(true)));
-
-  ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
-  EXPECT_EQ(0x450U, offset);
-}
-
-TEST_F(ElfTest, get_global_valid_dynamic_adjust_positive) {
-  ElfFake elf(memory_);
-  elf.FakeSetValid(true);
-
-  ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
-  interface->MockSetDynamicOffset(0x1000);
-  interface->MockSetDynamicVaddr(0x800);
-  interface->MockSetDynamicSize(0x100);
-  elf.FakeSetInterface(interface);
-
-  uint64_t offset;
-  std::string global("something");
-  EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
-      .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x850), ::testing::Return(true)));
-
-  ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
-  EXPECT_EQ(0x1050U, offset);
+  ASSERT_TRUE(elf.GetGlobalVariableOffset(global, &offset));
+  EXPECT_EQ(0xc080U, offset);
 }
 
 TEST_F(ElfTest, is_valid_pc_elf_invalid) {
diff --git a/libunwindstack/tests/JitDebugTest.cpp b/libunwindstack/tests/JitDebugTest.cpp
index b1ca111..9b32a3a 100644
--- a/libunwindstack/tests/JitDebugTest.cpp
+++ b/libunwindstack/tests/JitDebugTest.cpp
@@ -35,13 +35,17 @@
 
 class JitDebugTest : public ::testing::Test {
  protected:
-  void CreateFakeElf(MapInfo* map_info) {
+  void CreateFakeElf(MapInfo* map_info, uint64_t global_offset, uint64_t data_offset,
+                     uint64_t data_vaddr, uint64_t data_size) {
     MemoryFake* memory = new MemoryFake;
     ElfFake* elf = new ElfFake(memory);
     elf->FakeSetValid(true);
     ElfInterfaceFake* interface = new ElfInterfaceFake(memory);
     elf->FakeSetInterface(interface);
-    interface->FakeSetGlobalVariable("__jit_debug_descriptor", 0x800);
+    interface->FakeSetGlobalVariable("__jit_debug_descriptor", global_offset);
+    interface->FakeSetDataOffset(data_offset);
+    interface->FakeSetDataVaddrStart(data_vaddr);
+    interface->FakeSetDataVaddrEnd(data_vaddr + data_size);
     map_info->elf.reset(elf);
   }
 
@@ -52,27 +56,27 @@
     maps_.reset(
         new BufferMaps("1000-4000 ---s 00000000 00:00 0 /fake/elf1\n"
                        "4000-6000 r--s 00000000 00:00 0 /fake/elf1\n"
-                       "6000-8000 -wxs 00000000 00:00 0 /fake/elf1\n"
+                       "6000-8000 -wxs 00002000 00:00 0 /fake/elf1\n"
                        "a000-c000 --xp 00000000 00:00 0 /fake/elf2\n"
-                       "c000-f000 rw-p 00001000 00:00 0 /fake/elf2\n"
+                       "c000-f000 rw-p 00002000 00:00 0 /fake/elf2\n"
                        "f000-11000 r--p 00000000 00:00 0 /fake/elf3\n"
-                       "11000-12000 rw-p 00001000 00:00 0 /fake/elf3\n"
+                       "11000-12000 rw-p 00002000 00:00 0 /fake/elf3\n"
                        "12000-14000 r--p 00000000 00:00 0 /fake/elf4\n"
-                       "100000-110000 rw-p 0001000 00:00 0 /fake/elf4\n"
-                       "200000-210000 rw-p 0002000 00:00 0 /fake/elf4\n"));
+                       "100000-110000 rw-p 00ee000 00:00 0 /fake/elf4\n"
+                       "200000-210000 rw-p 01ee000 00:00 0 /fake/elf4\n"));
     ASSERT_TRUE(maps_->Parse());
 
     MapInfo* map_info = maps_->Get(3);
     ASSERT_TRUE(map_info != nullptr);
-    CreateFakeElf(map_info);
+    CreateFakeElf(map_info, 0x2800, 0x2000, 0x2000, 0x3000);
 
     map_info = maps_->Get(5);
     ASSERT_TRUE(map_info != nullptr);
-    CreateFakeElf(map_info);
+    CreateFakeElf(map_info, 0x2800, 0x2000, 0x2000, 0x3000);
 
     map_info = maps_->Get(7);
     ASSERT_TRUE(map_info != nullptr);
-    CreateFakeElf(map_info);
+    CreateFakeElf(map_info, 0xee800, 0xee000, 0xee000, 0x10000);
   }
 
   void SetUp() override {
@@ -258,7 +262,7 @@
 TEST_F(JitDebugTest, get_elf_no_valid_code_entry) {
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x11800, 0x200000);
 
   Elf* elf = jit_debug_->GetElf(maps_.get(), 0x1500);
   ASSERT_TRUE(elf == nullptr);
@@ -267,7 +271,7 @@
 TEST_F(JitDebugTest, get_elf_invalid_descriptor_first_entry) {
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
 
-  WriteDescriptor32(0xf800, 0);
+  WriteDescriptor32(0x11800, 0);
 
   Elf* elf = jit_debug_->GetElf(maps_.get(), 0x1500);
   ASSERT_TRUE(elf == nullptr);
@@ -276,9 +280,9 @@
 TEST_F(JitDebugTest, get_elf_invalid_descriptor_version) {
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
 
-  WriteDescriptor32(0xf800, 0x20000);
+  WriteDescriptor32(0x11800, 0x20000);
   // Set the version to an invalid value.
-  memory_->SetData32(0xf800, 2);
+  memory_->SetData32(0x11800, 2);
 
   Elf* elf = jit_debug_->GetElf(maps_.get(), 0x1500);
   ASSERT_TRUE(elf == nullptr);
@@ -287,7 +291,7 @@
 TEST_F(JitDebugTest, get_elf_32) {
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x11800, 0x200000);
   WriteEntry32Pad(0x200000, 0, 0, 0x4000, 0x1000);
 
   Elf* elf = jit_debug_->GetElf(maps_.get(), 0x1500);
@@ -304,16 +308,16 @@
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x5000, ELFCLASS32, EM_ARM, 0x2000, 0x300);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x11800, 0x200000);
   WriteEntry32Pad(0x200000, 0, 0, 0x4000, 0x1000);
-  WriteDescriptor32(0x12800, 0x201000);
+  WriteDescriptor32(0x100800, 0x201000);
   WriteEntry32Pad(0x201000, 0, 0, 0x5000, 0x1000);
 
   ASSERT_TRUE(jit_debug_->GetElf(maps_.get(), 0x1500) != nullptr);
   ASSERT_TRUE(jit_debug_->GetElf(maps_.get(), 0x2000) == nullptr);
 
   // Now clear the descriptor entry for the first one.
-  WriteDescriptor32(0xf800, 0);
+  WriteDescriptor32(0x11800, 0);
   jit_debug_.reset(new JitDebug(process_memory_));
   jit_debug_->SetArch(ARCH_ARM);
 
@@ -326,7 +330,7 @@
 
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x11800, 0x200000);
   WriteEntry32Pack(0x200000, 0, 0, 0x4000, 0x1000);
 
   jit_debug_->SetArch(ARCH_X86);
@@ -345,7 +349,7 @@
 
   CreateElf<Elf64_Ehdr, Elf64_Shdr>(0x4000, ELFCLASS64, EM_AARCH64, 0x1500, 0x200);
 
-  WriteDescriptor64(0xf800, 0x200000);
+  WriteDescriptor64(0x11800, 0x200000);
   WriteEntry64(0x200000, 0, 0, 0x4000, 0x1000);
 
   Elf* elf = jit_debug_->GetElf(maps_.get(), 0x1500);
@@ -362,7 +366,7 @@
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x5000, ELFCLASS32, EM_ARM, 0x2300, 0x400);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x11800, 0x200000);
   WriteEntry32Pad(0x200000, 0, 0x200100, 0x4000, 0x1000);
   WriteEntry32Pad(0x200100, 0x200100, 0, 0x5000, 0x1000);
 
@@ -385,7 +389,7 @@
 TEST_F(JitDebugTest, get_elf_search_libs) {
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x11800, 0x200000);
   WriteEntry32Pad(0x200000, 0, 0, 0x4000, 0x1000);
 
   // Only search a given named list of libs.
diff --git a/libunwindstack/tests/LocalUnwinderTest.cpp b/libunwindstack/tests/LocalUnwinderTest.cpp
index 56a18cd..9936f7a 100644
--- a/libunwindstack/tests/LocalUnwinderTest.cpp
+++ b/libunwindstack/tests/LocalUnwinderTest.cpp
@@ -170,10 +170,10 @@
 
   std::string testlib(testing::internal::GetArgvs()[0]);
   auto const value = testlib.find_last_of('/');
-  if (value == std::string::npos) {
-    testlib = "../";
+  if (value != std::string::npos) {
+    testlib = testlib.substr(0, value + 1);
   } else {
-    testlib = testlib.substr(0, value + 1) + "../";
+    testlib = "";
   }
   testlib += "libunwindstack_local.so";
 
diff --git a/libunwindstack/tests/LocalUpdatableMapsTest.cpp b/libunwindstack/tests/LocalUpdatableMapsTest.cpp
new file mode 100644
index 0000000..b816b9a
--- /dev/null
+++ b/libunwindstack/tests/LocalUpdatableMapsTest.cpp
@@ -0,0 +1,274 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdint.h>
+#include <sys/mman.h>
+
+#include <string>
+#include <vector>
+
+#include <gtest/gtest.h>
+
+#include <android-base/file.h>
+#include <unwindstack/Maps.h>
+
+namespace unwindstack {
+
+class TestUpdatableMaps : public LocalUpdatableMaps {
+ public:
+  TestUpdatableMaps() : LocalUpdatableMaps() {}
+  virtual ~TestUpdatableMaps() = default;
+
+  const std::string GetMapsFile() const override { return maps_file_; }
+
+  void TestSetMapsFile(const std::string& maps_file) { maps_file_ = maps_file; }
+
+  const std::vector<std::unique_ptr<MapInfo>>& TestGetSavedMaps() { return saved_maps_; }
+
+ private:
+  std::string maps_file_;
+};
+
+class LocalUpdatableMapsTest : public ::testing::Test {
+ protected:
+  static const std::string GetDefaultMapString() {
+    return "3000-4000 r-xp 00000 00:00 0\n8000-9000 r-xp 00000 00:00 0\n";
+  }
+
+  void SetUp() override {
+    TemporaryFile tf;
+    ASSERT_TRUE(android::base::WriteStringToFile(GetDefaultMapString(), tf.path));
+
+    maps_.TestSetMapsFile(tf.path);
+    ASSERT_TRUE(maps_.Parse());
+    ASSERT_EQ(2U, maps_.Total());
+
+    MapInfo* map_info = maps_.Get(0);
+    ASSERT_TRUE(map_info != nullptr);
+    EXPECT_EQ(0x3000U, map_info->start);
+    EXPECT_EQ(0x4000U, map_info->end);
+    EXPECT_EQ(0U, map_info->offset);
+    EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+    EXPECT_TRUE(map_info->name.empty());
+
+    map_info = maps_.Get(1);
+    ASSERT_TRUE(map_info != nullptr);
+    EXPECT_EQ(0x8000U, map_info->start);
+    EXPECT_EQ(0x9000U, map_info->end);
+    EXPECT_EQ(0U, map_info->offset);
+    EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+    EXPECT_TRUE(map_info->name.empty());
+  }
+
+  TestUpdatableMaps maps_;
+};
+
+TEST_F(LocalUpdatableMapsTest, same_map) {
+  TemporaryFile tf;
+  ASSERT_TRUE(android::base::WriteStringToFile(GetDefaultMapString(), tf.path));
+
+  maps_.TestSetMapsFile(tf.path);
+  ASSERT_TRUE(maps_.Reparse());
+  ASSERT_EQ(2U, maps_.Total());
+  EXPECT_EQ(0U, maps_.TestGetSavedMaps().size());
+
+  MapInfo* map_info = maps_.Get(0);
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0x3000U, map_info->start);
+  EXPECT_EQ(0x4000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+
+  map_info = maps_.Get(1);
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0x8000U, map_info->start);
+  EXPECT_EQ(0x9000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+}
+
+TEST_F(LocalUpdatableMapsTest, same_map_new_perms) {
+  TemporaryFile tf;
+  ASSERT_TRUE(
+      android::base::WriteStringToFile("3000-4000 rwxp 00000 00:00 0\n"
+                                       "8000-9000 r-xp 00000 00:00 0\n",
+                                       tf.path));
+
+  maps_.TestSetMapsFile(tf.path);
+  ASSERT_TRUE(maps_.Reparse());
+  ASSERT_EQ(2U, maps_.Total());
+
+  MapInfo* map_info = maps_.Get(0);
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0x3000U, map_info->start);
+  EXPECT_EQ(0x4000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_WRITE | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+
+  map_info = maps_.Get(1);
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0x8000U, map_info->start);
+  EXPECT_EQ(0x9000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+
+  auto& saved_maps = maps_.TestGetSavedMaps();
+  ASSERT_EQ(1U, saved_maps.size());
+  map_info = saved_maps[0].get();
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0x3000U, map_info->start);
+  EXPECT_EQ(0x4000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+}
+
+TEST_F(LocalUpdatableMapsTest, same_map_new_name) {
+  TemporaryFile tf;
+  ASSERT_TRUE(
+      android::base::WriteStringToFile("3000-4000 r-xp 00000 00:00 0 /fake/lib.so\n"
+                                       "8000-9000 r-xp 00000 00:00 0\n",
+                                       tf.path));
+
+  maps_.TestSetMapsFile(tf.path);
+  ASSERT_TRUE(maps_.Reparse());
+  ASSERT_EQ(2U, maps_.Total());
+
+  MapInfo* map_info = maps_.Get(0);
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0x3000U, map_info->start);
+  EXPECT_EQ(0x4000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_EQ("/fake/lib.so", map_info->name);
+
+  map_info = maps_.Get(1);
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0x8000U, map_info->start);
+  EXPECT_EQ(0x9000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+
+  auto& saved_maps = maps_.TestGetSavedMaps();
+  ASSERT_EQ(1U, saved_maps.size());
+  map_info = saved_maps[0].get();
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0x3000U, map_info->start);
+  EXPECT_EQ(0x4000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+}
+
+TEST_F(LocalUpdatableMapsTest, only_add_maps) {
+  TemporaryFile tf;
+  ASSERT_TRUE(
+      android::base::WriteStringToFile("1000-2000 r-xp 00000 00:00 0\n"
+                                       "3000-4000 r-xp 00000 00:00 0\n"
+                                       "8000-9000 r-xp 00000 00:00 0\n"
+                                       "a000-f000 r-xp 00000 00:00 0\n",
+                                       tf.path));
+
+  maps_.TestSetMapsFile(tf.path);
+  ASSERT_TRUE(maps_.Reparse());
+  ASSERT_EQ(4U, maps_.Total());
+  EXPECT_EQ(0U, maps_.TestGetSavedMaps().size());
+
+  MapInfo* map_info = maps_.Get(0);
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0x1000U, map_info->start);
+  EXPECT_EQ(0x2000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+
+  map_info = maps_.Get(1);
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0x3000U, map_info->start);
+  EXPECT_EQ(0x4000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+
+  map_info = maps_.Get(2);
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0x8000U, map_info->start);
+  EXPECT_EQ(0x9000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+
+  map_info = maps_.Get(3);
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0xa000U, map_info->start);
+  EXPECT_EQ(0xf000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+}
+
+TEST_F(LocalUpdatableMapsTest, all_new_maps) {
+  TemporaryFile tf;
+  ASSERT_TRUE(
+      android::base::WriteStringToFile("1000-2000 r-xp 00000 00:00 0\n"
+                                       "a000-f000 r-xp 00000 00:00 0\n",
+                                       tf.path));
+
+  maps_.TestSetMapsFile(tf.path);
+  ASSERT_TRUE(maps_.Reparse());
+  ASSERT_EQ(2U, maps_.Total());
+
+  MapInfo* map_info = maps_.Get(0);
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0x1000U, map_info->start);
+  EXPECT_EQ(0x2000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+
+  map_info = maps_.Get(1);
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0xa000U, map_info->start);
+  EXPECT_EQ(0xf000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+
+  auto& saved_maps = maps_.TestGetSavedMaps();
+  ASSERT_EQ(2U, saved_maps.size());
+  map_info = saved_maps[0].get();
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0x3000U, map_info->start);
+  EXPECT_EQ(0x4000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+
+  map_info = saved_maps[1].get();
+  ASSERT_TRUE(map_info != nullptr);
+  EXPECT_EQ(0x8000U, map_info->start);
+  EXPECT_EQ(0x9000U, map_info->end);
+  EXPECT_EQ(0U, map_info->offset);
+  EXPECT_EQ(PROT_READ | PROT_EXEC, map_info->flags);
+  EXPECT_TRUE(map_info->name.empty());
+}
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/MapInfoGetLoadBiasTest.cpp b/libunwindstack/tests/MapInfoGetLoadBiasTest.cpp
index f5ac6cb..da3dbf2 100644
--- a/libunwindstack/tests/MapInfoGetLoadBiasTest.cpp
+++ b/libunwindstack/tests/MapInfoGetLoadBiasTest.cpp
@@ -84,7 +84,7 @@
   elf_->FakeSetLoadBias(0);
   EXPECT_EQ(0U, map_info_->GetLoadBias(process_memory_));
 
-  map_info_->load_bias = static_cast<uint64_t>(-1);
+  map_info_->load_bias = INT64_MAX;
   elf_->FakeSetLoadBias(0x1000);
   EXPECT_EQ(0x1000U, map_info_->GetLoadBias(process_memory_));
 }
@@ -141,6 +141,7 @@
   phdr.p_type = PT_NULL;
   memory->SetMemory(offset + 0x5000, &phdr, sizeof(phdr));
   phdr.p_type = PT_LOAD;
+  phdr.p_flags = PF_X;
   phdr.p_offset = 0;
   phdr.p_vaddr = 0xe000;
   memory->SetMemory(offset + 0x5000 + sizeof(phdr), &phdr, sizeof(phdr));
diff --git a/libunwindstack/tests/MapInfoTest.cpp b/libunwindstack/tests/MapInfoTest.cpp
index e2cbb98..ef76b1b 100644
--- a/libunwindstack/tests/MapInfoTest.cpp
+++ b/libunwindstack/tests/MapInfoTest.cpp
@@ -35,7 +35,7 @@
   EXPECT_EQ(3UL, map_info.offset);
   EXPECT_EQ(4UL, map_info.flags);
   EXPECT_EQ("map", map_info.name);
-  EXPECT_EQ(static_cast<uint64_t>(-1), map_info.load_bias);
+  EXPECT_EQ(INT64_MAX, map_info.load_bias);
   EXPECT_EQ(0UL, map_info.elf_offset);
   EXPECT_TRUE(map_info.elf.get() == nullptr);
 }
@@ -51,7 +51,7 @@
   EXPECT_EQ(3UL, map_info.offset);
   EXPECT_EQ(4UL, map_info.flags);
   EXPECT_EQ("string_map", map_info.name);
-  EXPECT_EQ(static_cast<uint64_t>(-1), map_info.load_bias);
+  EXPECT_EQ(INT64_MAX, map_info.load_bias);
   EXPECT_EQ(0UL, map_info.elf_offset);
   EXPECT_TRUE(map_info.elf.get() == nullptr);
 }
diff --git a/libunwindstack/tests/RegsIterateTest.cpp b/libunwindstack/tests/RegsIterateTest.cpp
index 7e36953..bc95851 100644
--- a/libunwindstack/tests/RegsIterateTest.cpp
+++ b/libunwindstack/tests/RegsIterateTest.cpp
@@ -114,6 +114,7 @@
   result.push_back({"sp", ARM64_REG_SP});
   result.push_back({"lr", ARM64_REG_LR});
   result.push_back({"pc", ARM64_REG_PC});
+  result.push_back({"pst", ARM64_REG_PSTATE});
   return result;
 }
 
diff --git a/libunwindstack/tests/UnwindOfflineTest.cpp b/libunwindstack/tests/UnwindOfflineTest.cpp
index bded57a..364101a 100644
--- a/libunwindstack/tests/UnwindOfflineTest.cpp
+++ b/libunwindstack/tests/UnwindOfflineTest.cpp
@@ -1534,4 +1534,167 @@
   EXPECT_EQ(0x7ffd22415e90ULL, unwinder.frames()[16].sp);
 }
 
+TEST_F(UnwindOfflineTest, load_bias_different_section_bias_arm64) {
+  ASSERT_NO_FATAL_FAILURE(Init("load_bias_different_section_bias_arm64/", ARCH_ARM64));
+
+  Unwinder unwinder(128, maps_.get(), regs_.get(), process_memory_);
+  unwinder.Unwind();
+
+  std::string frame_info(DumpFrames(unwinder));
+  ASSERT_EQ(12U, unwinder.NumFrames()) << "Unwind:\n" << frame_info;
+  EXPECT_EQ(
+      "  #00 pc 00000000000d59bc  linker64 (__dl_syscall+28)\n"
+      "  #01 pc 00000000000554e8  linker64 (__dl__ZL24debuggerd_signal_handleriP7siginfoPv+1148)\n"
+      "  #02 pc 00000000000008c0  vdso (__kernel_rt_sigreturn)\n"
+      "  #03 pc 000000000007f3e8  libc.so (abort+168)\n"
+      "  #04 pc 00000000000459fc  test (std::__ndk1::__throw_bad_cast()+4)\n"
+      "  #05 pc 0000000000056d80  test (testing::Test::Run()+88)\n"
+      "  #06 pc 000000000005724c  test (testing::TestInfo::Run()+112)\n"
+      "  #07 pc 0000000000057558  test (testing::TestSuite::Run()+116)\n"
+      "  #08 pc 000000000005bffc  test (testing::internal::UnitTestImpl::RunAllTests()+464)\n"
+      "  #09 pc 000000000005bd9c  test (testing::UnitTest::Run()+116)\n"
+      "  #10 pc 00000000000464e4  test (main+144)\n"
+      "  #11 pc 000000000007aa34  libc.so (__libc_init+108)\n",
+      frame_info);
+
+  EXPECT_EQ(0x7112cb99bcULL, unwinder.frames()[0].pc);
+  EXPECT_EQ(0x7112bdbbf0ULL, unwinder.frames()[0].sp);
+  EXPECT_EQ(0x7112c394e8ULL, unwinder.frames()[1].pc);
+  EXPECT_EQ(0x7112bdbbf0ULL, unwinder.frames()[1].sp);
+  EXPECT_EQ(0x7112be28c0ULL, unwinder.frames()[2].pc);
+  EXPECT_EQ(0x7112bdbda0ULL, unwinder.frames()[2].sp);
+  EXPECT_EQ(0x71115ab3e8ULL, unwinder.frames()[3].pc);
+  EXPECT_EQ(0x7fdd4a3f00ULL, unwinder.frames()[3].sp);
+  EXPECT_EQ(0x5f739dc9fcULL, unwinder.frames()[4].pc);
+  EXPECT_EQ(0x7fdd4a3fe0ULL, unwinder.frames()[4].sp);
+  EXPECT_EQ(0x5f739edd80ULL, unwinder.frames()[5].pc);
+  EXPECT_EQ(0x7fdd4a3ff0ULL, unwinder.frames()[5].sp);
+  EXPECT_EQ(0x5f739ee24cULL, unwinder.frames()[6].pc);
+  EXPECT_EQ(0x7fdd4a4010ULL, unwinder.frames()[6].sp);
+  EXPECT_EQ(0x5f739ee558ULL, unwinder.frames()[7].pc);
+  EXPECT_EQ(0x7fdd4a4040ULL, unwinder.frames()[7].sp);
+  EXPECT_EQ(0x5f739f2ffcULL, unwinder.frames()[8].pc);
+  EXPECT_EQ(0x7fdd4a4070ULL, unwinder.frames()[8].sp);
+  EXPECT_EQ(0x5f739f2d9cULL, unwinder.frames()[9].pc);
+  EXPECT_EQ(0x7fdd4a4100ULL, unwinder.frames()[9].sp);
+  EXPECT_EQ(0x5f739dd4e4ULL, unwinder.frames()[10].pc);
+  EXPECT_EQ(0x7fdd4a4130ULL, unwinder.frames()[10].sp);
+  EXPECT_EQ(0x71115a6a34ULL, unwinder.frames()[11].pc);
+  EXPECT_EQ(0x7fdd4a4170ULL, unwinder.frames()[11].sp);
+}
+
+TEST_F(UnwindOfflineTest, eh_frame_bias_x86) {
+  ASSERT_NO_FATAL_FAILURE(Init("eh_frame_bias_x86/", ARCH_X86));
+
+  Unwinder unwinder(128, maps_.get(), regs_.get(), process_memory_);
+  unwinder.Unwind();
+
+  std::string frame_info(DumpFrames(unwinder));
+  ASSERT_EQ(11U, unwinder.NumFrames()) << "Unwind:\n" << frame_info;
+  EXPECT_EQ(
+      "  #00 pc ffffe430  vdso.so (__kernel_vsyscall+16)\n"
+      "  #01 pc 00082a4b  libc.so (__epoll_pwait+43)\n"
+      "  #02 pc 000303a3  libc.so (epoll_pwait+115)\n"
+      "  #03 pc 000303ed  libc.so (epoll_wait+45)\n"
+      "  #04 pc 00010ea2  tombstoned (epoll_dispatch+226)\n"
+      "  #05 pc 0000c5e7  tombstoned (event_base_loop+1095)\n"
+      "  #06 pc 0000c193  tombstoned (event_base_dispatch+35)\n"
+      "  #07 pc 00005c77  tombstoned (main+884)\n"
+      "  #08 pc 00015f66  libc.so (__libc_init+102)\n"
+      "  #09 pc 0000360e  tombstoned (_start+98)\n"
+      "  #10 pc 00000001  <unknown>\n",
+      frame_info);
+
+  EXPECT_EQ(0xffffe430ULL, unwinder.frames()[0].pc);
+  EXPECT_EQ(0xfffe1a30ULL, unwinder.frames()[0].sp);
+  EXPECT_EQ(0xeb585a4bULL, unwinder.frames()[1].pc);
+  EXPECT_EQ(0xfffe1a40ULL, unwinder.frames()[1].sp);
+  EXPECT_EQ(0xeb5333a3ULL, unwinder.frames()[2].pc);
+  EXPECT_EQ(0xfffe1a60ULL, unwinder.frames()[2].sp);
+  EXPECT_EQ(0xeb5333edULL, unwinder.frames()[3].pc);
+  EXPECT_EQ(0xfffe1ab0ULL, unwinder.frames()[3].sp);
+  EXPECT_EQ(0xeb841ea2ULL, unwinder.frames()[4].pc);
+  EXPECT_EQ(0xfffe1ae0ULL, unwinder.frames()[4].sp);
+  EXPECT_EQ(0xeb83d5e7ULL, unwinder.frames()[5].pc);
+  EXPECT_EQ(0xfffe1b30ULL, unwinder.frames()[5].sp);
+  EXPECT_EQ(0xeb83d193ULL, unwinder.frames()[6].pc);
+  EXPECT_EQ(0xfffe1bd0ULL, unwinder.frames()[6].sp);
+  EXPECT_EQ(0xeb836c77ULL, unwinder.frames()[7].pc);
+  EXPECT_EQ(0xfffe1c00ULL, unwinder.frames()[7].sp);
+  EXPECT_EQ(0xeb518f66ULL, unwinder.frames()[8].pc);
+  EXPECT_EQ(0xfffe1d00ULL, unwinder.frames()[8].sp);
+  EXPECT_EQ(0xeb83460eULL, unwinder.frames()[9].pc);
+  EXPECT_EQ(0xfffe1d40ULL, unwinder.frames()[9].sp);
+  EXPECT_EQ(0x00000001ULL, unwinder.frames()[10].pc);
+  EXPECT_EQ(0xfffe1d74ULL, unwinder.frames()[10].sp);
+}
+
+TEST_F(UnwindOfflineTest, signal_load_bias_arm) {
+  ASSERT_NO_FATAL_FAILURE(Init("signal_load_bias_arm/", ARCH_ARM));
+
+  Unwinder unwinder(128, maps_.get(), regs_.get(), process_memory_);
+  unwinder.Unwind();
+
+  std::string frame_info(DumpFrames(unwinder));
+  ASSERT_EQ(17U, unwinder.NumFrames()) << "Unwind:\n" << frame_info;
+  EXPECT_EQ(
+      "  #00 pc 0029ef9e  libunwindstack_unit_test (SignalInnerFunction+10)\n"
+      "  #01 pc 0029efa7  libunwindstack_unit_test (SignalMiddleFunction+2)\n"
+      "  #02 pc 0029efaf  libunwindstack_unit_test (SignalOuterFunction+2)\n"
+      "  #03 pc 002a280b  libunwindstack_unit_test (unwindstack::SignalCallerHandler(int, "
+      "siginfo*, void*)+10)\n"
+      "  #04 pc 00058bd4  libc.so (__restore)\n"
+      "  #05 pc 0029f01e  libunwindstack_unit_test (InnerFunction+106)\n"
+      "  #06 pc 0029f633  libunwindstack_unit_test (MiddleFunction+16)\n"
+      "  #07 pc 0029f64b  libunwindstack_unit_test (OuterFunction+16)\n"
+      "  #08 pc 002a1711  libunwindstack_unit_test (unwindstack::RemoteThroughSignal(int, unsigned "
+      "int)+260)\n"
+      "  #09 pc 002a1603  libunwindstack_unit_test "
+      "(unwindstack::UnwindTest_remote_through_signal_Test::TestBody()+10)\n"
+      "  #10 pc 002c8fe3  libunwindstack_unit_test (testing::Test::Run()+130)\n"
+      "  #11 pc 002c9b25  libunwindstack_unit_test (testing::TestInfo::Run()+184)\n"
+      "  #12 pc 002c9e27  libunwindstack_unit_test (testing::TestSuite::Run()+202)\n"
+      "  #13 pc 002d193d  libunwindstack_unit_test "
+      "(testing::internal::UnitTestImpl::RunAllTests()+660)\n"
+      "  #14 pc 002d160b  libunwindstack_unit_test (testing::UnitTest::Run()+134)\n"
+      "  #15 pc 002de035  libunwindstack_unit_test (IsolateMain+680)\n"
+      "  #16 pc 00058155  libc.so (__libc_init+68)\n",
+      frame_info);
+
+  EXPECT_EQ(0xb6955f9eULL, unwinder.frames()[0].pc);
+  EXPECT_EQ(0xf2790ce8ULL, unwinder.frames()[0].sp);
+  EXPECT_EQ(0xb6955fa7ULL, unwinder.frames()[1].pc);
+  EXPECT_EQ(0xf2790ce8ULL, unwinder.frames()[1].sp);
+  EXPECT_EQ(0xb6955fafULL, unwinder.frames()[2].pc);
+  EXPECT_EQ(0xf2790cf0ULL, unwinder.frames()[2].sp);
+  EXPECT_EQ(0xb695980bULL, unwinder.frames()[3].pc);
+  EXPECT_EQ(0xf2790cf8ULL, unwinder.frames()[3].sp);
+  EXPECT_EQ(0xf23febd4ULL, unwinder.frames()[4].pc);
+  EXPECT_EQ(0xf2790d10ULL, unwinder.frames()[4].sp);
+  EXPECT_EQ(0xb695601eULL, unwinder.frames()[5].pc);
+  EXPECT_EQ(0xffe67798ULL, unwinder.frames()[5].sp);
+  EXPECT_EQ(0xb6956633ULL, unwinder.frames()[6].pc);
+  EXPECT_EQ(0xffe67890ULL, unwinder.frames()[6].sp);
+  EXPECT_EQ(0xb695664bULL, unwinder.frames()[7].pc);
+  EXPECT_EQ(0xffe678a0ULL, unwinder.frames()[7].sp);
+  EXPECT_EQ(0xb6958711ULL, unwinder.frames()[8].pc);
+  EXPECT_EQ(0xffe678b0ULL, unwinder.frames()[8].sp);
+  EXPECT_EQ(0xb6958603ULL, unwinder.frames()[9].pc);
+  EXPECT_EQ(0xffe67ac8ULL, unwinder.frames()[9].sp);
+  EXPECT_EQ(0xb697ffe3ULL, unwinder.frames()[10].pc);
+  EXPECT_EQ(0xffe67ad8ULL, unwinder.frames()[10].sp);
+  EXPECT_EQ(0xb6980b25ULL, unwinder.frames()[11].pc);
+  EXPECT_EQ(0xffe67ae8ULL, unwinder.frames()[11].sp);
+  EXPECT_EQ(0xb6980e27ULL, unwinder.frames()[12].pc);
+  EXPECT_EQ(0xffe67b18ULL, unwinder.frames()[12].sp);
+  EXPECT_EQ(0xb698893dULL, unwinder.frames()[13].pc);
+  EXPECT_EQ(0xffe67b48ULL, unwinder.frames()[13].sp);
+  EXPECT_EQ(0xb698860bULL, unwinder.frames()[14].pc);
+  EXPECT_EQ(0xffe67bb0ULL, unwinder.frames()[14].sp);
+  EXPECT_EQ(0xb6995035ULL, unwinder.frames()[15].pc);
+  EXPECT_EQ(0xffe67bd0ULL, unwinder.frames()[15].sp);
+  EXPECT_EQ(0xf23fe155ULL, unwinder.frames()[16].pc);
+  EXPECT_EQ(0xffe67d10ULL, unwinder.frames()[16].sp);
+}
+
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/VerifyBionicTerminationTest.cpp b/libunwindstack/tests/VerifyBionicTerminationTest.cpp
new file mode 100644
index 0000000..6a3e91a
--- /dev/null
+++ b/libunwindstack/tests/VerifyBionicTerminationTest.cpp
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define _GNU_SOURCE 1
+#include <stdint.h>
+#include <string.h>
+
+#include <string>
+
+#if defined(__BIONIC__)
+
+#include <gtest/gtest.h>
+
+#include <unwindstack/DwarfSection.h>
+#include <unwindstack/Elf.h>
+#include <unwindstack/ElfInterface.h>
+#include <unwindstack/Regs.h>
+#include <unwindstack/RegsGetLocal.h>
+#include <unwindstack/Unwinder.h>
+
+// This test is specific to bionic to verify that __libc_init is
+// properly setting the return address to undefined so that the
+// unwind properly terminates.
+
+namespace unwindstack {
+
+static std::string DumpFrames(const UnwinderFromPid& unwinder) {
+  std::string unwind;
+  for (size_t i = 0; i < unwinder.NumFrames(); i++) {
+    unwind += unwinder.FormatFrame(i) + '\n';
+  }
+  return unwind;
+}
+
+static DwarfLocationEnum GetReturnAddressLocation(uint64_t rel_pc, DwarfSection* section) {
+  if (section == nullptr) {
+    return DWARF_LOCATION_INVALID;
+  }
+
+  const DwarfFde* fde = section->GetFdeFromPc(rel_pc);
+  if (fde == nullptr || fde->cie == nullptr) {
+    return DWARF_LOCATION_INVALID;
+  }
+  dwarf_loc_regs_t regs;
+  if (!section->GetCfaLocationInfo(rel_pc, fde, &regs)) {
+    return DWARF_LOCATION_INVALID;
+  }
+
+  auto reg_entry = regs.find(fde->cie->return_address_register);
+  if (reg_entry == regs.end()) {
+    return DWARF_LOCATION_INVALID;
+  }
+  return reg_entry->second.type;
+}
+
+static void VerifyReturnAddress(const FrameData& frame) {
+  // Now go and find information about the register data and verify that the relative pc results in
+  // an undefined register.
+  Elf elf(Memory::CreateFileMemory(frame.map_name, 0).release());
+  ASSERT_TRUE(elf.Init()) << "Failed to init elf object from " << frame.map_name;
+  ASSERT_TRUE(elf.valid()) << "Elf " << frame.map_name << " is not valid.";
+  ElfInterface* interface = elf.interface();
+
+  // Only check the eh_frame and the debug_frame since the undefined register
+  // is set using a cfi directive.
+  // Check debug_frame first, then eh_frame since debug_frame always
+  // contains the most specific data.
+  DwarfLocationEnum location = GetReturnAddressLocation(frame.rel_pc, interface->debug_frame());
+  if (location == DWARF_LOCATION_UNDEFINED) {
+    return;
+  }
+
+  location = GetReturnAddressLocation(frame.rel_pc, interface->eh_frame());
+  ASSERT_EQ(DWARF_LOCATION_UNDEFINED, location);
+}
+
+// This test assumes that it starts from the main thread, and that the
+// libc.so on device will include symbols so that function names can
+// be resolved.
+TEST(VerifyBionicTermination, local_terminate) {
+  std::unique_ptr<Regs> regs(Regs::CreateFromLocal());
+
+  UnwinderFromPid unwinder(512, getpid());
+  ASSERT_TRUE(unwinder.Init(regs->Arch()));
+  unwinder.SetRegs(regs.get());
+
+  RegsGetLocal(regs.get());
+  unwinder.Unwind();
+  ASSERT_LT(0U, unwinder.NumFrames());
+
+  SCOPED_TRACE(DumpFrames(unwinder));
+
+  // Look for the frame that includes __libc_init, there should only
+  // be one and it should be the last.
+  bool found = false;
+  const std::vector<FrameData>& frames = unwinder.frames();
+  for (size_t i = 0; i < unwinder.NumFrames(); i++) {
+    const FrameData& frame = frames[i];
+    if (frame.function_name == "__libc_init" && !frame.map_name.empty() &&
+        std::string("libc.so") == basename(frame.map_name.c_str())) {
+      ASSERT_EQ(unwinder.NumFrames(), i + 1) << "__libc_init is not last frame.";
+      ASSERT_NO_FATAL_FAILURE(VerifyReturnAddress(frame));
+      found = true;
+    }
+  }
+  ASSERT_TRUE(found) << "Unable to find libc.so:__libc_init frame\n";
+}
+
+}  // namespace unwindstack
+
+#endif
diff --git a/libunwindstack/tests/files/offline/art_quick_osr_stub_arm/maps.txt b/libunwindstack/tests/files/offline/art_quick_osr_stub_arm/maps.txt
index 5657373..1ff12db 100644
--- a/libunwindstack/tests/files/offline/art_quick_osr_stub_arm/maps.txt
+++ b/libunwindstack/tests/files/offline/art_quick_osr_stub_arm/maps.txt
@@ -1,4 +1,4 @@
 d0250000-d2600000 r-xp 0 00:00 0 <anonymous:d0250000>
 e466e000-e4ae8000 r-xp 0 00:00 0 libart.so
-e4ae8000-e4ae9000 rw-p 1000 00:00 0 libart.so
+e4af1000-e4af2000 rw-p 482000 00:00 0 libart.so
 e7d91000-e7e31000 r-xp 0 00:00 0 libc.so
diff --git a/libunwindstack/tests/files/offline/eh_frame_bias_x86/libc.so b/libunwindstack/tests/files/offline/eh_frame_bias_x86/libc.so
new file mode 100644
index 0000000..f3eb615
--- /dev/null
+++ b/libunwindstack/tests/files/offline/eh_frame_bias_x86/libc.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/eh_frame_bias_x86/maps.txt b/libunwindstack/tests/files/offline/eh_frame_bias_x86/maps.txt
new file mode 100644
index 0000000..7d52483
--- /dev/null
+++ b/libunwindstack/tests/files/offline/eh_frame_bias_x86/maps.txt
@@ -0,0 +1,3 @@
+eb503000-eb5e8000 r-xp 0 00:00 0   libc.so
+eb831000-eb852000 r-xp 0 00:00 0   tombstoned
+ffffe000-fffff000 r-xp 0 00:00 0   vdso.so
diff --git a/libunwindstack/tests/files/offline/eh_frame_bias_x86/regs.txt b/libunwindstack/tests/files/offline/eh_frame_bias_x86/regs.txt
new file mode 100644
index 0000000..821928e
--- /dev/null
+++ b/libunwindstack/tests/files/offline/eh_frame_bias_x86/regs.txt
@@ -0,0 +1,9 @@
+eax: fffffffc
+ebx: 4
+ecx: eb290180
+edx: 20
+ebp: 8
+edi: 0
+esi: ffffffff
+esp: fffe1a30
+eip: ffffe430
diff --git a/libunwindstack/tests/files/offline/eh_frame_bias_x86/stack.data b/libunwindstack/tests/files/offline/eh_frame_bias_x86/stack.data
new file mode 100644
index 0000000..b95bfac
--- /dev/null
+++ b/libunwindstack/tests/files/offline/eh_frame_bias_x86/stack.data
Binary files differ
diff --git a/libunwindstack/tests/files/offline/eh_frame_bias_x86/tombstoned b/libunwindstack/tests/files/offline/eh_frame_bias_x86/tombstoned
new file mode 100644
index 0000000..aefdb6b
--- /dev/null
+++ b/libunwindstack/tests/files/offline/eh_frame_bias_x86/tombstoned
Binary files differ
diff --git a/libunwindstack/tests/files/offline/eh_frame_bias_x86/vdso.so b/libunwindstack/tests/files/offline/eh_frame_bias_x86/vdso.so
new file mode 100644
index 0000000..c71dcfb
--- /dev/null
+++ b/libunwindstack/tests/files/offline/eh_frame_bias_x86/vdso.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/jit_debug_arm/maps.txt b/libunwindstack/tests/files/offline/jit_debug_arm/maps.txt
index 4043122..3b87f2f 100644
--- a/libunwindstack/tests/files/offline/jit_debug_arm/maps.txt
+++ b/libunwindstack/tests/files/offline/jit_debug_arm/maps.txt
@@ -4,8 +4,8 @@
 e0447000-e0448000 r-xp 2000 00:00 0   137-cfi.odex
 e2796000-e4796000 r-xp 0 00:00 0   anonymous:e2796000
 e648e000-e690f000 r-xp 0 00:00 0  libart.so
-e690f000-e6910000 rw-p 1000 00:00 0  libart.so
+e6918000-e6919000 rw-p 489000 00:00 0  libart.so
 ed306000-ed801000 r-xp 0 00:00 0   libartd.so
-ed801000-ed802000 rw-p 1000 00:00 0   libartd.so
+ed80a000-ed80b000 rw-p 503000 00:00 0   libartd.so
 eda88000-edb23000 r-xp 0 00:00 0   libc.so
 ede4e000-ede50000 r-xp 0 00:00 0   anonymous:ede4e000
diff --git a/libunwindstack/tests/files/offline/jit_debug_x86/maps.txt b/libunwindstack/tests/files/offline/jit_debug_x86/maps.txt
index f255a44..c22b5de 100644
--- a/libunwindstack/tests/files/offline/jit_debug_x86/maps.txt
+++ b/libunwindstack/tests/files/offline/jit_debug_x86/maps.txt
@@ -4,5 +4,5 @@
 ec606000-ec607000 r-xp 2000 00:00 0   137-cfi.odex
 ee74c000-f074c000 r-xp 0 00:00 0   anonymous:ee74c000
 f6be1000-f732b000 r-xp 0 00:00 0   libartd.so
-f732b000-f732c000 rw-p 1000 00:00 0   libartd.so
+f7334000-f7335000 rw-p 752000 00:00 0   libartd.so
 f734b000-f74fc000 r-xp 0 00:00 0   libc.so
diff --git a/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/libc.so b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/libc.so
new file mode 100644
index 0000000..7bb7156
--- /dev/null
+++ b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/libc.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/linker64 b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/linker64
new file mode 100644
index 0000000..00a3896
--- /dev/null
+++ b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/linker64
Binary files differ
diff --git a/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/maps.txt b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/maps.txt
new file mode 100644
index 0000000..a2babee
--- /dev/null
+++ b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/maps.txt
@@ -0,0 +1,7 @@
+5f73997000-5f739dc000 r--p 0 00:00 0   test
+5f739dc000-5f73a43000 r-xp 44000 00:00 0   test
+711152c000-711156e000 r--p 0 00:00 0   libc.so
+711156e000-7111611000 --xp 42000 00:00 0   libc.so
+7112be2000-7112be4000 r-xp 0 00:00 0   vdso
+7112be4000-7112c1c000 r--p 0 00:00 0   linker64
+7112c1c000-7112ce1000 r-xp 38000 00:00 0   linker64
diff --git a/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/regs.txt b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/regs.txt
new file mode 100644
index 0000000..3c601e1
--- /dev/null
+++ b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/regs.txt
@@ -0,0 +1,33 @@
+x0: 7112bdbc24
+x1: 0
+x2: ffffffff
+x3: 0
+x4: 0
+x5: 0
+x6: 0
+x7: 7f7f7f7f7f7f7f7f
+x8: 62
+x9: a78826643b37f4a1
+x10: 7112bdbc20
+x11: 4100
+x12: 7112bdbb70
+x13: 18
+x14: 1d6518077
+x15: 2a43148faf732a
+x16: 16fc0
+x17: 71115f61a0
+x18: 7111d6a000
+x19: 7112cef1b0
+x20: 7112bdbda0
+x21: 59616d61
+x22: 1
+x23: 7112bdbc24
+x24: 4b0e
+x25: 62
+x26: 2
+x27: 0
+x28: 7111934020
+x29: 7112bdbd90
+sp: 7112bdbbf0
+lr: 7112c394ec
+pc: 7112cb99bc
diff --git a/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/stack0.data b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/stack0.data
new file mode 100644
index 0000000..1674733
--- /dev/null
+++ b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/stack0.data
Binary files differ
diff --git a/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/stack1.data b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/stack1.data
new file mode 100644
index 0000000..6d7b48a
--- /dev/null
+++ b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/stack1.data
Binary files differ
diff --git a/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/test b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/test
new file mode 100644
index 0000000..3a75b8f
--- /dev/null
+++ b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/test
Binary files differ
diff --git a/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/vdso b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/vdso
new file mode 100644
index 0000000..4940916
--- /dev/null
+++ b/libunwindstack/tests/files/offline/load_bias_different_section_bias_arm64/vdso
Binary files differ
diff --git a/libunwindstack/tests/files/offline/signal_load_bias_arm/libc.so b/libunwindstack/tests/files/offline/signal_load_bias_arm/libc.so
new file mode 100644
index 0000000..f046624
--- /dev/null
+++ b/libunwindstack/tests/files/offline/signal_load_bias_arm/libc.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/signal_load_bias_arm/libunwindstack_unit_test b/libunwindstack/tests/files/offline/signal_load_bias_arm/libunwindstack_unit_test
new file mode 100644
index 0000000..f460dd6
--- /dev/null
+++ b/libunwindstack/tests/files/offline/signal_load_bias_arm/libunwindstack_unit_test
Binary files differ
diff --git a/libunwindstack/tests/files/offline/signal_load_bias_arm/maps.txt b/libunwindstack/tests/files/offline/signal_load_bias_arm/maps.txt
new file mode 100644
index 0000000..165ae49
--- /dev/null
+++ b/libunwindstack/tests/files/offline/signal_load_bias_arm/maps.txt
@@ -0,0 +1,4 @@
+b66b7000-b670c000 r--p 0 00:00 0   libunwindstack_unit_test
+b670c000-b69a8000 r-xp 54000 00:00 0   libunwindstack_unit_test
+f23a6000-f23d0000 r--p 0 00:00 0   libc.so
+f23d0000-f2451000 r-xp 29000 00:00 0   libc.so
diff --git a/libunwindstack/tests/files/offline/signal_load_bias_arm/regs.txt b/libunwindstack/tests/files/offline/signal_load_bias_arm/regs.txt
new file mode 100644
index 0000000..e03f8fd
--- /dev/null
+++ b/libunwindstack/tests/files/offline/signal_load_bias_arm/regs.txt
@@ -0,0 +1,16 @@
+r0: b69b7c84
+r1: 1
+r2: 1
+r3: 1
+r4: f1e52bd0
+r5: f1e11000
+r6: f1e52bd0
+r7: f1e52a38
+r8: f1e11000
+r9: 5de82a8f
+r10: f1e06030
+r11: f1e6d080
+ip: ffe67a88
+sp: f2790ce8
+lr: b6955fab
+pc: b6955f9e
diff --git a/libunwindstack/tests/files/offline/signal_load_bias_arm/stack0.data b/libunwindstack/tests/files/offline/signal_load_bias_arm/stack0.data
new file mode 100644
index 0000000..d9f23f8
--- /dev/null
+++ b/libunwindstack/tests/files/offline/signal_load_bias_arm/stack0.data
Binary files differ
diff --git a/libunwindstack/tests/files/offline/signal_load_bias_arm/stack1.data b/libunwindstack/tests/files/offline/signal_load_bias_arm/stack1.data
new file mode 100644
index 0000000..6011883
--- /dev/null
+++ b/libunwindstack/tests/files/offline/signal_load_bias_arm/stack1.data
Binary files differ
diff --git a/libunwindstack/tools/unwind_for_offline.cpp b/libunwindstack/tools/unwind_for_offline.cpp
index 4f67d67..64b58a8 100644
--- a/libunwindstack/tools/unwind_for_offline.cpp
+++ b/libunwindstack/tools/unwind_for_offline.cpp
@@ -275,6 +275,9 @@
 
     if (maps_by_start.count(frame.map_start) == 0) {
       map_info = maps->Find(frame.map_start);
+      if (map_info == nullptr) {
+        continue;
+      }
 
       auto info = FillInAndGetMapInfo(maps_by_start, map_info);
       bool file_copied = false;
diff --git a/libunwindstack/tools/unwind_reg_info.cpp b/libunwindstack/tools/unwind_reg_info.cpp
index d0562d9..0cbcac5 100644
--- a/libunwindstack/tools/unwind_reg_info.cpp
+++ b/libunwindstack/tools/unwind_reg_info.cpp
@@ -165,8 +165,8 @@
   }
 }
 
-int GetInfo(const char* file, uint64_t pc) {
-  Elf elf(Memory::CreateFileMemory(file, pc).release());
+int GetInfo(const char* file, uint64_t offset, uint64_t pc) {
+  Elf elf(Memory::CreateFileMemory(file, offset).release());
   if (!elf.Init() || !elf.valid()) {
     printf("%s is not a valid elf file.\n", file);
     return 1;
@@ -243,12 +243,14 @@
 }  // namespace unwindstack
 
 int main(int argc, char** argv) {
-  if (argc != 3) {
-    printf("Usage: unwind_reg_info ELF_FILE PC\n");
+  if (argc != 3 && argc != 4) {
+    printf("Usage: unwind_reg_info ELF_FILE PC [OFFSET]\n");
     printf("  ELF_FILE\n");
     printf("    The path to an elf file.\n");
     printf("  PC\n");
     printf("    The pc for which the register information should be obtained.\n");
+    printf("  OFFSET\n");
+    printf("    Use the offset into the ELF file as the beginning of the elf.\n");
     return 1;
   }
 
@@ -270,5 +272,15 @@
     return 1;
   }
 
-  return unwindstack::GetInfo(argv[1], pc);
+  uint64_t offset = 0;
+  if (argc == 4) {
+    char* end;
+    offset = strtoull(argv[3], &end, 16);
+    if (*end != '\0') {
+      printf("Malformed OFFSET value: %s\n", argv[3]);
+      return 1;
+    }
+  }
+
+  return unwindstack::GetInfo(argv[1], offset, pc);
 }
diff --git a/libutils/Android.bp b/libutils/Android.bp
index 8be4dd0..efa4c41 100644
--- a/libutils/Android.bp
+++ b/libutils/Android.bp
@@ -125,6 +125,7 @@
     native_bridge_supported: true,
 
     srcs: [
+        "Errors.cpp",
         "FileMap.cpp",
         "JenkinsHash.cpp",
         "NativeHandle.cpp",
@@ -205,6 +206,7 @@
         "Mutex_test.cpp",
         "SharedBuffer_test.cpp",
         "String8_test.cpp",
+        "String16_test.cpp",
         "StrongPointer_test.cpp",
         "Unicode_test.cpp",
         "Vector_test.cpp",
@@ -289,3 +291,9 @@
     ],
     shared_libs: ["libutils_test_singleton1"],
 }
+
+cc_benchmark {
+    name: "libutils_benchmark",
+    srcs: ["Vector_benchmark.cpp"],
+    shared_libs: ["libutils"],
+}
diff --git a/libutils/Errors.cpp b/libutils/Errors.cpp
new file mode 100644
index 0000000..74f3bef
--- /dev/null
+++ b/libutils/Errors.cpp
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <utils/Errors.h>
+
+namespace android {
+
+std::string statusToString(status_t s) {
+#define STATUS_CASE(STATUS) \
+    case STATUS:            \
+        return #STATUS
+
+    switch (s) {
+        STATUS_CASE(OK);
+        STATUS_CASE(UNKNOWN_ERROR);
+        STATUS_CASE(NO_MEMORY);
+        STATUS_CASE(INVALID_OPERATION);
+        STATUS_CASE(BAD_VALUE);
+        STATUS_CASE(BAD_TYPE);
+        STATUS_CASE(NAME_NOT_FOUND);
+        STATUS_CASE(PERMISSION_DENIED);
+        STATUS_CASE(NO_INIT);
+        STATUS_CASE(ALREADY_EXISTS);
+        STATUS_CASE(DEAD_OBJECT);
+        STATUS_CASE(FAILED_TRANSACTION);
+        STATUS_CASE(BAD_INDEX);
+        STATUS_CASE(NOT_ENOUGH_DATA);
+        STATUS_CASE(WOULD_BLOCK);
+        STATUS_CASE(TIMED_OUT);
+        STATUS_CASE(UNKNOWN_TRANSACTION);
+        STATUS_CASE(FDS_NOT_ALLOWED);
+        STATUS_CASE(UNEXPECTED_NULL);
+#undef STATUS_CASE
+    }
+
+    return std::to_string(s) + " (" + strerror(-s) + ")";
+}
+
+}  // namespace android
diff --git a/libutils/Looper_test.cpp b/libutils/Looper_test.cpp
index 6fdc0edc..37bdf05 100644
--- a/libutils/Looper_test.cpp
+++ b/libutils/Looper_test.cpp
@@ -11,8 +11,9 @@
 
 #include <utils/threads.h>
 
+// b/141212746 - increased for virtual platforms with higher volatility
 // # of milliseconds to fudge stopwatch measurements
-#define TIMING_TOLERANCE_MS 25
+#define TIMING_TOLERANCE_MS 100
 
 namespace android {
 
diff --git a/libutils/SharedBuffer.cpp b/libutils/SharedBuffer.cpp
index 7910c6e..3e703db 100644
--- a/libutils/SharedBuffer.cpp
+++ b/libutils/SharedBuffer.cpp
@@ -41,6 +41,7 @@
         // The following is OK on Android-supported platforms.
         sb->mRefs.store(1, std::memory_order_relaxed);
         sb->mSize = size;
+        sb->mClientMetadata = 0;
     }
     return sb;
 }
diff --git a/libutils/SharedBuffer.h b/libutils/SharedBuffer.h
index fdf13a9..476c842 100644
--- a/libutils/SharedBuffer.h
+++ b/libutils/SharedBuffer.h
@@ -102,7 +102,12 @@
         // Must be sized to preserve correct alignment.
         mutable std::atomic<int32_t>        mRefs;
                 size_t                      mSize;
-                uint32_t                    mReserved[2];
+                uint32_t                    mReserved;
+public:
+        // mClientMetadata is reserved for client use.  It is initialized to 0
+        // and the clients can do whatever they want with it.  Note that this is
+        // placed last so that it is adjcent to the buffer allocated.
+                uint32_t                    mClientMetadata;
 };
 
 static_assert(sizeof(SharedBuffer) % 8 == 0
diff --git a/libutils/String16.cpp b/libutils/String16.cpp
index 818b171..e2a8c59 100644
--- a/libutils/String16.cpp
+++ b/libutils/String16.cpp
@@ -24,21 +24,21 @@
 
 namespace android {
 
+static const StaticString16 emptyString(u"");
 static inline char16_t* getEmptyString() {
-    static SharedBuffer* gEmptyStringBuf = [] {
-        SharedBuffer* buf = SharedBuffer::alloc(sizeof(char16_t));
-        char16_t* str = static_cast<char16_t*>(buf->data());
-        *str = 0;
-        return buf;
-    }();
-
-    gEmptyStringBuf->acquire();
-    return static_cast<char16_t*>(gEmptyStringBuf->data());
+    return const_cast<char16_t*>(emptyString.string());
 }
 
 // ---------------------------------------------------------------------------
 
-static char16_t* allocFromUTF8(const char* u8str, size_t u8len)
+void* String16::alloc(size_t size)
+{
+    SharedBuffer* buf = SharedBuffer::alloc(size);
+    buf->mClientMetadata = kIsSharedBufferAllocated;
+    return buf;
+}
+
+char16_t* String16::allocFromUTF8(const char* u8str, size_t u8len)
 {
     if (u8len == 0) return getEmptyString();
 
@@ -49,7 +49,7 @@
         return getEmptyString();
     }
 
-    SharedBuffer* buf = SharedBuffer::alloc(sizeof(char16_t)*(u16len+1));
+    SharedBuffer* buf = static_cast<SharedBuffer*>(alloc(sizeof(char16_t) * (u16len + 1)));
     if (buf) {
         u8cur = (const uint8_t*) u8str;
         char16_t* u16str = (char16_t*)buf->data();
@@ -66,13 +66,13 @@
     return getEmptyString();
 }
 
-static char16_t* allocFromUTF16(const char16_t* u16str, size_t u16len) {
+char16_t* String16::allocFromUTF16(const char16_t* u16str, size_t u16len) {
     if (u16len >= SIZE_MAX / sizeof(char16_t)) {
         android_errorWriteLog(0x534e4554, "73826242");
         abort();
     }
 
-    SharedBuffer* buf = SharedBuffer::alloc((u16len + 1) * sizeof(char16_t));
+    SharedBuffer* buf = static_cast<SharedBuffer*>(alloc((u16len + 1) * sizeof(char16_t)));
     ALOG_ASSERT(buf, "Unable to allocate shared buffer");
     if (buf) {
         char16_t* str = (char16_t*)buf->data();
@@ -97,8 +97,8 @@
     // having run. In this case we always allocate an empty string. It's less
     // efficient than using getEmptyString(), but we assume it's uncommon.
 
-    char16_t* data = static_cast<char16_t*>(
-            SharedBuffer::alloc(sizeof(char16_t))->data());
+    SharedBuffer* buf = static_cast<SharedBuffer*>(alloc(sizeof(char16_t)));
+    char16_t* data = static_cast<char16_t*>(buf->data());
     data[0] = 0;
     mString = data;
 }
@@ -106,7 +106,7 @@
 String16::String16(const String16& o)
     : mString(o.mString)
 {
-    SharedBuffer::bufferFromData(mString)->acquire();
+    acquire();
 }
 
 String16::String16(const String16& o, size_t len, size_t begin)
@@ -136,26 +136,30 @@
 
 String16::~String16()
 {
-    SharedBuffer::bufferFromData(mString)->release();
+    release();
 }
 
 size_t String16::size() const
 {
-    return SharedBuffer::sizeFromData(mString)/sizeof(char16_t)-1;
+    if (isStaticString()) {
+        return staticStringSize();
+    } else {
+        return SharedBuffer::sizeFromData(mString) / sizeof(char16_t) - 1;
+    }
 }
 
 void String16::setTo(const String16& other)
 {
-    SharedBuffer::bufferFromData(other.mString)->acquire();
-    SharedBuffer::bufferFromData(mString)->release();
+    release();
     mString = other.mString;
+    acquire();
 }
 
 status_t String16::setTo(const String16& other, size_t len, size_t begin)
 {
     const size_t N = other.size();
     if (begin >= N) {
-        SharedBuffer::bufferFromData(mString)->release();
+        release();
         mString = getEmptyString();
         return OK;
     }
@@ -184,8 +188,7 @@
         abort();
     }
 
-    SharedBuffer* buf = SharedBuffer::bufferFromData(mString)
-        ->editResize((len+1)*sizeof(char16_t));
+    SharedBuffer* buf = static_cast<SharedBuffer*>(editResize((len + 1) * sizeof(char16_t)));
     if (buf) {
         char16_t* str = (char16_t*)buf->data();
         memmove(str, other, len*sizeof(char16_t));
@@ -212,8 +215,8 @@
         abort();
     }
 
-    SharedBuffer* buf = SharedBuffer::bufferFromData(mString)
-        ->editResize((myLen+otherLen+1)*sizeof(char16_t));
+    SharedBuffer* buf =
+            static_cast<SharedBuffer*>(editResize((myLen + otherLen + 1) * sizeof(char16_t)));
     if (buf) {
         char16_t* str = (char16_t*)buf->data();
         memcpy(str+myLen, other, (otherLen+1)*sizeof(char16_t));
@@ -238,8 +241,8 @@
         abort();
     }
 
-    SharedBuffer* buf = SharedBuffer::bufferFromData(mString)
-        ->editResize((myLen+otherLen+1)*sizeof(char16_t));
+    SharedBuffer* buf =
+            static_cast<SharedBuffer*>(editResize((myLen + otherLen + 1) * sizeof(char16_t)));
     if (buf) {
         char16_t* str = (char16_t*)buf->data();
         memcpy(str+myLen, chrs, otherLen*sizeof(char16_t));
@@ -273,8 +276,8 @@
            len, myLen, String8(chrs, len).string());
     #endif
 
-    SharedBuffer* buf = SharedBuffer::bufferFromData(mString)
-        ->editResize((myLen+len+1)*sizeof(char16_t));
+    SharedBuffer* buf =
+            static_cast<SharedBuffer*>(editResize((myLen + len + 1) * sizeof(char16_t)));
     if (buf) {
         char16_t* str = (char16_t*)buf->data();
         if (pos < myLen) {
@@ -338,23 +341,85 @@
     return strstr16(mString, chrs) != nullptr;
 }
 
+void* String16::edit() {
+    SharedBuffer* buf;
+    if (isStaticString()) {
+        buf = static_cast<SharedBuffer*>(alloc((size() + 1) * sizeof(char16_t)));
+        if (buf) {
+            memcpy(buf->data(), mString, (size() + 1) * sizeof(char16_t));
+        }
+    } else {
+        buf = SharedBuffer::bufferFromData(mString)->edit();
+        buf->mClientMetadata = kIsSharedBufferAllocated;
+    }
+    return buf;
+}
+
+void* String16::editResize(size_t newSize) {
+    SharedBuffer* buf;
+    if (isStaticString()) {
+        size_t copySize = (size() + 1) * sizeof(char16_t);
+        if (newSize < copySize) {
+            copySize = newSize;
+        }
+        buf = static_cast<SharedBuffer*>(alloc(newSize));
+        if (buf) {
+            memcpy(buf->data(), mString, copySize);
+        }
+    } else {
+        buf = SharedBuffer::bufferFromData(mString)->editResize(newSize);
+        buf->mClientMetadata = kIsSharedBufferAllocated;
+    }
+    return buf;
+}
+
+void String16::acquire()
+{
+    if (!isStaticString()) {
+        SharedBuffer::bufferFromData(mString)->acquire();
+    }
+}
+
+void String16::release()
+{
+    if (!isStaticString()) {
+        SharedBuffer::bufferFromData(mString)->release();
+    }
+}
+
+bool String16::isStaticString() const {
+    // See String16.h for notes on the memory layout of String16::StaticData and
+    // SharedBuffer.
+    static_assert(sizeof(SharedBuffer) - offsetof(SharedBuffer, mClientMetadata) == 4);
+    const uint32_t* p = reinterpret_cast<const uint32_t*>(mString);
+    return (*(p - 1) & kIsSharedBufferAllocated) == 0;
+}
+
+size_t String16::staticStringSize() const {
+    // See String16.h for notes on the memory layout of String16::StaticData and
+    // SharedBuffer.
+    static_assert(sizeof(SharedBuffer) - offsetof(SharedBuffer, mClientMetadata) == 4);
+    const uint32_t* p = reinterpret_cast<const uint32_t*>(mString);
+    return static_cast<size_t>(*(p - 1));
+}
+
 status_t String16::makeLower()
 {
     const size_t N = size();
     const char16_t* str = string();
-    char16_t* edit = nullptr;
+    char16_t* edited = nullptr;
     for (size_t i=0; i<N; i++) {
         const char16_t v = str[i];
         if (v >= 'A' && v <= 'Z') {
-            if (!edit) {
-                SharedBuffer* buf = SharedBuffer::bufferFromData(mString)->edit();
+            if (!edited) {
+                SharedBuffer* buf = static_cast<SharedBuffer*>(edit());
                 if (!buf) {
                     return NO_MEMORY;
                 }
-                edit = (char16_t*)buf->data();
-                mString = str = edit;
+                edited = (char16_t*)buf->data();
+                mString = str = edited;
             }
-            edit[i] = tolower((char)v);
+            edited[i] = tolower((char)v);
         }
     }
     return OK;
@@ -364,18 +429,18 @@
 {
     const size_t N = size();
     const char16_t* str = string();
-    char16_t* edit = nullptr;
+    char16_t* edited = nullptr;
     for (size_t i=0; i<N; i++) {
         if (str[i] == replaceThis) {
-            if (!edit) {
-                SharedBuffer* buf = SharedBuffer::bufferFromData(mString)->edit();
+            if (!edited) {
+                SharedBuffer* buf = static_cast<SharedBuffer*>(edit());
                 if (!buf) {
                     return NO_MEMORY;
                 }
-                edit = (char16_t*)buf->data();
-                mString = str = edit;
+                edited = (char16_t*)buf->data();
+                mString = str = edited;
             }
-            edit[i] = withThis;
+            edited[i] = withThis;
         }
     }
     return OK;
@@ -385,7 +450,7 @@
 {
     const size_t N = size();
     if (begin >= N) {
-        SharedBuffer::bufferFromData(mString)->release();
+        release();
         mString = getEmptyString();
         return OK;
     }
@@ -395,8 +460,7 @@
     }
 
     if (begin > 0) {
-        SharedBuffer* buf = SharedBuffer::bufferFromData(mString)
-            ->editResize((N+1)*sizeof(char16_t));
+        SharedBuffer* buf = static_cast<SharedBuffer*>(editResize((N + 1) * sizeof(char16_t)));
         if (!buf) {
             return NO_MEMORY;
         }
@@ -404,8 +468,7 @@
         memmove(str, str+begin, (N-begin+1)*sizeof(char16_t));
         mString = str;
     }
-    SharedBuffer* buf = SharedBuffer::bufferFromData(mString)
-        ->editResize((len+1)*sizeof(char16_t));
+    SharedBuffer* buf = static_cast<SharedBuffer*>(editResize((len + 1) * sizeof(char16_t)));
     if (buf) {
         char16_t* str = (char16_t*)buf->data();
         str[len] = 0;
diff --git a/libutils/String16_test.cpp b/libutils/String16_test.cpp
new file mode 100644
index 0000000..f1f24c3
--- /dev/null
+++ b/libutils/String16_test.cpp
@@ -0,0 +1,218 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <utils/String16.h>
+#include <utils/String8.h>
+
+#include <gtest/gtest.h>
+
+namespace android {
+
+::testing::AssertionResult Char16_tStringEquals(const char16_t* a, const char16_t* b) {
+    if (strcmp16(a, b) != 0) {
+        return ::testing::AssertionFailure()
+               << "\"" << String8(a).c_str() << "\" not equal to \"" << String8(b).c_str() << "\"";
+    }
+    return ::testing::AssertionSuccess();
+}
+
+#define EXPECT_STR16EQ(a, b) EXPECT_TRUE(Char16_tStringEquals(a, b))
+
+TEST(String16Test, FromChar16_t) {
+    String16 tmp(u"Verify me");
+    EXPECT_STR16EQ(u"Verify me", tmp);
+}
+
+TEST(String16Test, FromChar16_tSized) {
+    String16 tmp(u"Verify me", 7);
+    EXPECT_STR16EQ(u"Verify ", tmp);
+}
+
+TEST(String16Test, FromChar) {
+    String16 tmp("Verify me");
+    EXPECT_STR16EQ(u"Verify me", tmp);
+}
+
+TEST(String16Test, FromCharSized) {
+    String16 tmp("Verify me", 7);
+    EXPECT_STR16EQ(u"Verify ", tmp);
+}
+
+TEST(String16Test, Copy) {
+    String16 tmp("Verify me");
+    String16 another = tmp;
+    EXPECT_STR16EQ(u"Verify me", tmp);
+    EXPECT_STR16EQ(u"Verify me", another);
+}
+
+TEST(String16Test, Move) {
+    String16 tmp("Verify me");
+    String16 another(std::move(tmp));
+    EXPECT_STR16EQ(u"Verify me", another);
+}
+
+TEST(String16Test, Size) {
+    String16 tmp("Verify me");
+    EXPECT_EQ(9U, tmp.size());
+}
+
+TEST(String16Test, setTo) {
+    String16 tmp("Verify me");
+    tmp.setTo(u"New content");
+    EXPECT_EQ(11U, tmp.size());
+    EXPECT_STR16EQ(u"New content", tmp);
+}
+
+TEST(String16Test, Append) {
+    String16 tmp("Verify me");
+    tmp.append(String16("Hello"));
+    EXPECT_EQ(14U, tmp.size());
+    EXPECT_STR16EQ(u"Verify meHello", tmp);
+}
+
+TEST(String16Test, Insert) {
+    String16 tmp("Verify me");
+    tmp.insert(6, u"Insert");
+    EXPECT_EQ(15U, tmp.size());
+    EXPECT_STR16EQ(u"VerifyInsert me", tmp);
+}
+
+TEST(String16Test, Remove) {
+    String16 tmp("Verify me");
+    tmp.remove(2, 6);
+    EXPECT_EQ(2U, tmp.size());
+    EXPECT_STR16EQ(u" m", tmp);
+}
+
+TEST(String16Test, MakeLower) {
+    String16 tmp("Verify Me!");
+    tmp.makeLower();
+    EXPECT_EQ(10U, tmp.size());
+    EXPECT_STR16EQ(u"verify me!", tmp);
+}
+
+TEST(String16Test, ReplaceAll) {
+    String16 tmp("Verify verify Verify");
+    tmp.replaceAll(u'r', u'!');
+    EXPECT_STR16EQ(u"Ve!ify ve!ify Ve!ify", tmp);
+}
+
+TEST(String16Test, Compare) {
+    String16 tmp("Verify me");
+    EXPECT_EQ(String16(u"Verify me"), tmp);
+}
+
+TEST(String16Test, StaticString) {
+    String16 nonStaticString("NonStatic");
+    StaticString16 staticString(u"Static");
+
+    EXPECT_TRUE(staticString.isStaticString());
+    EXPECT_FALSE(nonStaticString.isStaticString());
+}
+
+TEST(String16Test, StaticStringCopy) {
+    StaticString16 tmp(u"Verify me");
+    String16 another = tmp;
+    EXPECT_STR16EQ(u"Verify me", tmp);
+    EXPECT_STR16EQ(u"Verify me", another);
+    EXPECT_TRUE(tmp.isStaticString());
+    EXPECT_TRUE(another.isStaticString());
+}
+
+TEST(String16Test, StaticStringMove) {
+    StaticString16 tmp(u"Verify me");
+    String16 another(std::move(tmp));
+    EXPECT_STR16EQ(u"Verify me", another);
+    EXPECT_TRUE(another.isStaticString());
+}
+
+TEST(String16Test, StaticStringSize) {
+    StaticString16 tmp(u"Verify me");
+    EXPECT_EQ(9U, tmp.size());
+}
+
+TEST(String16Test, StaticStringSetTo) {
+    StaticString16 tmp(u"Verify me");
+    tmp.setTo(u"New content");
+    EXPECT_EQ(11U, tmp.size());
+    EXPECT_STR16EQ(u"New content", tmp);
+    EXPECT_FALSE(tmp.isStaticString());
+}
+
+TEST(String16Test, StaticStringAppend) {
+    StaticString16 tmp(u"Verify me");
+    tmp.append(String16("Hello"));
+    EXPECT_EQ(14U, tmp.size());
+    EXPECT_STR16EQ(u"Verify meHello", tmp);
+    EXPECT_FALSE(tmp.isStaticString());
+}
+
+TEST(String16Test, StaticStringInsert) {
+    StaticString16 tmp(u"Verify me");
+    tmp.insert(6, u"Insert");
+    EXPECT_EQ(15U, tmp.size());
+    EXPECT_STR16EQ(u"VerifyInsert me", tmp);
+    EXPECT_FALSE(tmp.isStaticString());
+}
+
+TEST(String16Test, StaticStringRemove) {
+    StaticString16 tmp(u"Verify me");
+    tmp.remove(2, 6);
+    EXPECT_EQ(2U, tmp.size());
+    EXPECT_STR16EQ(u" m", tmp);
+    EXPECT_FALSE(tmp.isStaticString());
+}
+
+TEST(String16Test, StaticStringMakeLower) {
+    StaticString16 tmp(u"Verify me!");
+    tmp.makeLower();
+    EXPECT_EQ(10U, tmp.size());
+    EXPECT_STR16EQ(u"verify me!", tmp);
+    EXPECT_FALSE(tmp.isStaticString());
+}
+
+TEST(String16Test, StaticStringReplaceAll) {
+    StaticString16 tmp(u"Verify verify Verify");
+    tmp.replaceAll(u'r', u'!');
+    EXPECT_STR16EQ(u"Ve!ify ve!ify Ve!ify", tmp);
+    EXPECT_FALSE(tmp.isStaticString());
+}
+
+TEST(String16Test, StaticStringCompare) {
+    StaticString16 tmp(u"Verify me");
+    EXPECT_EQ(String16(u"Verify me"), tmp);
+}
+
+TEST(String16Test, StringSetToStaticString) {
+    StaticString16 tmp(u"Verify me");
+    String16 another(u"nonstatic");
+    another = tmp;
+    EXPECT_STR16EQ(u"Verify me", tmp);
+    EXPECT_STR16EQ(u"Verify me", another);
+}
+
+TEST(String16Test, StringMoveFromStaticString) {
+    StaticString16 tmp(u"Verify me");
+    String16 another(std::move(tmp));
+    EXPECT_STR16EQ(u"Verify me", another);
+}
+
+TEST(String16Test, EmptyStringIsStatic) {
+    String16 tmp("");
+    EXPECT_TRUE(tmp.isStaticString());
+}
+
+}  // namespace android
diff --git a/libutils/StrongPointer.cpp b/libutils/StrongPointer.cpp
index ba52502..ef46723 100644
--- a/libutils/StrongPointer.cpp
+++ b/libutils/StrongPointer.cpp
@@ -21,4 +21,7 @@
 namespace android {
 
 void sp_report_race() { LOG_ALWAYS_FATAL("sp<> assignment detected data race"); }
+
+void sp_report_stack_pointer() { LOG_ALWAYS_FATAL("sp<> constructed with stack pointer argument"); }
+
 }
diff --git a/libutils/Timers.cpp b/libutils/Timers.cpp
index c3641ef..1172ae7 100644
--- a/libutils/Timers.cpp
+++ b/libutils/Timers.cpp
@@ -22,7 +22,8 @@
 #include <limits.h>
 #include <time.h>
 
-#if defined(__ANDROID__)
+// host linux support requires Linux 2.6.39+
+#if defined(__linux__)
 nsecs_t systemTime(int clock)
 {
     static const clockid_t clocks[] = {
@@ -41,8 +42,7 @@
 nsecs_t systemTime(int /*clock*/)
 {
     // Clock support varies widely across hosts. Mac OS doesn't support
-    // posix clocks, older glibcs don't support CLOCK_BOOTTIME and Windows
-    // is windows.
+    // CLOCK_BOOTTIME, and Windows is windows.
     struct timeval t;
     t.tv_sec = t.tv_usec = 0;
     gettimeofday(&t, nullptr);
diff --git a/libutils/Vector_benchmark.cpp b/libutils/Vector_benchmark.cpp
new file mode 100644
index 0000000..c23d499
--- /dev/null
+++ b/libutils/Vector_benchmark.cpp
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <benchmark/benchmark.h>
+#include <utils/Vector.h>
+#include <vector>
+
+void BM_fill_android_vector(benchmark::State& state) {
+    android::Vector<char> v;
+    while (state.KeepRunning()) {
+        v.push('A');
+    }
+}
+BENCHMARK(BM_fill_android_vector);
+
+void BM_fill_std_vector(benchmark::State& state) {
+    std::vector<char> v;
+    while (state.KeepRunning()) {
+        v.push_back('A');
+    }
+}
+BENCHMARK(BM_fill_std_vector);
+
+void BM_prepend_android_vector(benchmark::State& state) {
+    android::Vector<char> v;
+    while (state.KeepRunning()) {
+        v.insertAt('A', 0);
+    }
+}
+BENCHMARK(BM_prepend_android_vector);
+
+void BM_prepend_std_vector(benchmark::State& state) {
+    std::vector<char> v;
+    while (state.KeepRunning()) {
+        v.insert(v.begin(), 'A');
+    }
+}
+BENCHMARK(BM_prepend_std_vector);
+
+BENCHMARK_MAIN();
diff --git a/libutils/include/utils/ByteOrder.h b/libutils/include/utils/ByteOrder.h
index 44ea13d..9b940e6 100644
--- a/libutils/include/utils/ByteOrder.h
+++ b/libutils/include/utils/ByteOrder.h
@@ -14,10 +14,17 @@
  * limitations under the License.
  */
 
-//
+#pragma once
 
-#ifndef _LIBS_UTILS_BYTE_ORDER_H
-#define _LIBS_UTILS_BYTE_ORDER_H
+/*
+ * If you're looking for a portable <endian.h> that's available on Android,
+ * Linux, macOS, and Windows, see <android-base/endian.h> instead.
+ *
+ * Nothing in this file is useful because all supported Android ABIs are
+ * little-endian and all our code that runs on the host assumes that the host is
+ * also little-endian. What pretense at big-endian support exists is completely
+ * untested and unlikely to actually work.
+ */
 
 #include <stdint.h>
 #include <sys/types.h>
@@ -27,55 +34,12 @@
 #include <netinet/in.h>
 #endif
 
-/*
- * These macros are like the hton/ntoh byte swapping macros,
- * except they allow you to swap to and from the "device" byte
- * order.  The device byte order is the endianness of the target
- * device -- for the ARM CPUs we use today, this is little endian.
- *
- * Note that the byte swapping functions have not been optimized
- * much; performance is currently not an issue for them since the
- * intent is to allow us to avoid byte swapping on the device.
- */
+/* TODO: move this cruft to frameworks/. */
 
-static inline uint32_t android_swap_long(uint32_t v)
-{
-    return (v<<24) | ((v<<8)&0x00FF0000) | ((v>>8)&0x0000FF00) | (v>>24);
-}
+#define dtohl(x) (x)
+#define dtohs(x) (x)
+#define htodl(x) (x)
+#define htods(x) (x)
 
-static inline uint16_t android_swap_short(uint16_t v)
-{
-    return (v<<8) | (v>>8);
-}
-
-#define DEVICE_BYTE_ORDER LITTLE_ENDIAN
-
-#if BYTE_ORDER == DEVICE_BYTE_ORDER
-
-#define	dtohl(x)	(x)
-#define	dtohs(x)	(x)
-#define	htodl(x)	(x)
-#define	htods(x)	(x)
-
-#else
-
-#define	dtohl(x)	(android_swap_long(x))
-#define	dtohs(x)	(android_swap_short(x))
-#define	htodl(x)	(android_swap_long(x))
-#define	htods(x)	(android_swap_short(x))
-
-#endif
-
-#if BYTE_ORDER == LITTLE_ENDIAN
 #define fromlel(x) (x)
-#define fromles(x) (x)
 #define tolel(x) (x)
-#define toles(x) (x)
-#else
-#define fromlel(x) (android_swap_long(x))
-#define fromles(x) (android_swap_short(x))
-#define tolel(x) (android_swap_long(x))
-#define toles(x) (android_swap_short(x))
-#endif
-
-#endif // _LIBS_UTILS_BYTE_ORDER_H
diff --git a/libutils/include/utils/Errors.h b/libutils/include/utils/Errors.h
index 1e03677..d14d223 100644
--- a/libutils/include/utils/Errors.h
+++ b/libutils/include/utils/Errors.h
@@ -19,6 +19,7 @@
 #include <errno.h>
 #include <stdint.h>
 #include <sys/types.h>
+#include <string>
 
 namespace android {
 
@@ -72,6 +73,9 @@
     UNEXPECTED_NULL     = (UNKNOWN_ERROR + 8),
 };
 
+// Human readable name of error
+std::string statusToString(status_t status);
+
 // Restore define; enumeration is in "android" namespace, so the value defined
 // there won't work for Win32 code in a different namespace.
 #ifdef _WIN32
diff --git a/libutils/include/utils/Flattenable.h b/libutils/include/utils/Flattenable.h
index 9d00602..953b859 100644
--- a/libutils/include/utils/Flattenable.h
+++ b/libutils/include/utils/Flattenable.h
@@ -17,6 +17,9 @@
 #ifndef ANDROID_UTILS_FLATTENABLE_H
 #define ANDROID_UTILS_FLATTENABLE_H
 
+// DO NOT USE: please use parcelable instead
+// This code is deprecated and will not be supported via AIDL code gen. For data
+// to be sent over binder, please use parcelables.
 
 #include <stdint.h>
 #include <string.h>
@@ -28,7 +31,9 @@
 
 namespace android {
 
-
+// DO NOT USE: please use parcelable instead
+// This code is deprecated and will not be supported via AIDL code gen. For data
+// to be sent over binder, please use parcelables.
 class FlattenableUtils {
 public:
     template<size_t N>
@@ -79,7 +84,9 @@
     }
 };
 
-
+// DO NOT USE: please use parcelable instead
+// This code is deprecated and will not be supported via AIDL code gen. For data
+// to be sent over binder, please use parcelables.
 /*
  * The Flattenable protocol allows an object to serialize itself out
  * to a byte-buffer and an array of file descriptors.
@@ -131,6 +138,9 @@
     return static_cast<T*>(this)->T::unflatten(buffer, size, fds, count);
 }
 
+// DO NOT USE: please use parcelable instead
+// This code is deprecated and will not be supported via AIDL code gen. For data
+// to be sent over binder, please use parcelables.
 /*
  * LightFlattenable is a protocol allowing object to serialize themselves out
  * to a byte-buffer. Because it doesn't handle file-descriptors,
@@ -171,6 +181,9 @@
     return static_cast<T*>(this)->T::unflatten(buffer, size);
 }
 
+// DO NOT USE: please use parcelable instead
+// This code is deprecated and will not be supported via AIDL code gen. For data
+// to be sent over binder, please use parcelables.
 /*
  * LightFlattenablePod is an implementation of the LightFlattenable protocol
  * for POD (plain-old-data) objects.
diff --git a/libutils/include/utils/String16.h b/libutils/include/utils/String16.h
index afbc2ed..adc3e7d 100644
--- a/libutils/include/utils/String16.h
+++ b/libutils/include/utils/String16.h
@@ -37,13 +37,17 @@
 
 class String8;
 
+template <size_t N>
+class StaticString16;
+
 // DO NOT USE: please use std::u16string
 
 //! This is a string holding UTF-16 characters.
 class String16
 {
 public:
-    /* use String16(StaticLinkage) if you're statically linking against
+    /*
+     * Use String16(StaticLinkage) if you're statically linking against
      * libutils and declaring an empty static String16, e.g.:
      *
      *   static String16 sAStaticEmptyString(String16::kEmptyString);
@@ -123,8 +127,76 @@
 
     inline                      operator const char16_t*() const;
 
-private:
-            const char16_t*     mString;
+    // Static and non-static String16 behave the same for the users, so
+    // this method isn't of much use for the users. It is public for testing.
+            bool                isStaticString() const;
+
+  private:
+    /*
+     * A flag indicating the type of underlying buffer.
+     */
+    static constexpr uint32_t kIsSharedBufferAllocated = 0x80000000;
+
+    /*
+     * alloc() returns void* so that SharedBuffer class is not exposed.
+     */
+    static void* alloc(size_t size);
+    static char16_t* allocFromUTF8(const char* u8str, size_t u8len);
+    static char16_t* allocFromUTF16(const char16_t* u16str, size_t u16len);
+
+    /*
+     * edit() and editResize() return void* so that SharedBuffer class
+     * is not exposed.
+     */
+    void* edit();
+    void* editResize(size_t new_size);
+
+    void acquire();
+    void release();
+
+    size_t staticStringSize() const;
+
+    const char16_t* mString;
+
+protected:
+    /*
+     * Data structure used to allocate static storage for static String16.
+     *
+     * Note that this data structure and SharedBuffer are used interchangably
+     * as the underlying data structure for a String16.  Therefore, the layout
+     * of this data structure must match the part in SharedBuffer that is
+     * visible to String16.
+     */
+    template <size_t N>
+    struct StaticData {
+        // The high bit of 'size' is used as a flag.
+        static_assert(N - 1 < kIsSharedBufferAllocated, "StaticString16 too long!");
+        constexpr StaticData() : size(N - 1), data{0} {}
+        const uint32_t size;
+        char16_t data[N];
+
+        constexpr StaticData(const StaticData<N>&) = default;
+    };
+
+    /*
+     * Helper function for constructing a StaticData object.
+     */
+    template <size_t N>
+    static constexpr const StaticData<N> makeStaticData(const char16_t (&s)[N]) {
+        StaticData<N> r;
+        // The 'size' field is at the same location where mClientMetadata would
+        // be for a SharedBuffer.  We do NOT set kIsSharedBufferAllocated flag
+        // here.
+        for (size_t i = 0; i < N - 1; ++i) r.data[i] = s[i];
+        return r;
+    }
+
+    template <size_t N>
+    explicit constexpr String16(const StaticData<N>& s) : mString(s.data) {}
+
+public:
+    template <size_t N>
+    explicit constexpr String16(const StaticString16<N>& s) : mString(s.mString) {}
 };
 
 // String16 can be trivially moved using memcpy() because moving does not
@@ -132,6 +204,42 @@
 ANDROID_TRIVIAL_MOVE_TRAIT(String16)
 
 // ---------------------------------------------------------------------------
+
+/*
+ * A StaticString16 object is a specialized String16 object.  Instead of holding
+ * the string data in a ref counted SharedBuffer object, it holds data in a
+ * buffer within StaticString16 itself.  Note that this buffer is NOT ref
+ * counted and is assumed to be available for as long as there is at least a
+ * String16 object using it.  Therefore, one must be extra careful to NEVER
+ * assign a StaticString16 to a String16 that outlives the StaticString16
+ * object.
+ *
+ * THE SAFEST APPROACH IS TO USE StaticString16 ONLY AS GLOBAL VARIABLES.
+ *
+ * A StaticString16 SHOULD NEVER APPEAR IN APIs.  USE String16 INSTEAD.
+ */
+template <size_t N>
+class StaticString16 : public String16 {
+public:
+    constexpr StaticString16(const char16_t (&s)[N]) : String16(mData), mData(makeStaticData(s)) {}
+
+    constexpr StaticString16(const StaticString16<N>& other)
+        : String16(mData), mData(other.mData) {}
+
+    constexpr StaticString16(const StaticString16<N>&&) = delete;
+
+    // There is no reason why one would want to 'new' a StaticString16.  Delete
+    // it to discourage misuse.
+    static void* operator new(std::size_t) = delete;
+
+private:
+    const StaticData<N> mData;
+};
+
+template <typename F>
+StaticString16(const F&)->StaticString16<sizeof(F) / sizeof(char16_t)>;
+
+// ---------------------------------------------------------------------------
 // No user servicable parts below.
 
 inline int compare_type(const String16& lhs, const String16& rhs)
diff --git a/libutils/include/utils/StrongPointer.h b/libutils/include/utils/StrongPointer.h
index 9cd7c75..07dd3f1 100644
--- a/libutils/include/utils/StrongPointer.h
+++ b/libutils/include/utils/StrongPointer.h
@@ -122,26 +122,54 @@
         return o != *this;
     }
 
-private:    
+private:
     template<typename Y> friend class sp;
     template<typename Y> friend class wp;
     void set_pointer(T* ptr);
+    static inline void check_not_on_stack(const void* ptr);
     T* m_ptr;
 };
 
-// For code size reasons, we do not want this inlined or templated.
+// For code size reasons, we do not want these inlined or templated.
 void sp_report_race();
+void sp_report_stack_pointer();
 
 #undef COMPARE
 
 // ---------------------------------------------------------------------------
 // No user serviceable parts below here.
 
+// Check whether address is definitely on the calling stack.  We actually check whether it is on
+// the same 4K page as the frame pointer.
+//
+// Assumptions:
+// - Pages are never smaller than 4K (MIN_PAGE_SIZE)
+// - Malloced memory never shares a page with a stack.
+//
+// It does not appear safe to broaden this check to include adjacent pages; apparently this code
+// is used in environments where there may not be a guard page below (at higher addresses than)
+// the bottom of the stack.
+//
+// TODO: Consider adding make_sp<T>() to allocate an object and wrap the resulting pointer safely
+// without checking overhead.
+template <typename T>
+void sp<T>::check_not_on_stack(const void* ptr) {
+    static constexpr int MIN_PAGE_SIZE = 0x1000;  // 4K. Safer than including sys/user.h.
+    static constexpr uintptr_t MIN_PAGE_MASK = ~static_cast<uintptr_t>(MIN_PAGE_SIZE - 1);
+    uintptr_t my_frame_address =
+            reinterpret_cast<uintptr_t>(__builtin_frame_address(0 /* this frame */));
+    if (((reinterpret_cast<uintptr_t>(ptr) ^ my_frame_address) & MIN_PAGE_MASK) == 0) {
+        sp_report_stack_pointer();
+    }
+}
+
 template<typename T>
 sp<T>::sp(T* other)
         : m_ptr(other) {
-    if (other)
+    if (other) {
+        check_not_on_stack(other);
         other->incStrong(this);
+    }
 }
 
 template<typename T>
@@ -159,8 +187,10 @@
 template<typename T> template<typename U>
 sp<T>::sp(U* other)
         : m_ptr(other) {
-    if (other)
+    if (other) {
+        check_not_on_stack(other);
         (static_cast<T*>(other))->incStrong(this);
+    }
 }
 
 template<typename T> template<typename U>
@@ -207,7 +237,10 @@
 template<typename T>
 sp<T>& sp<T>::operator =(T* other) {
     T* oldPtr(*const_cast<T* volatile*>(&m_ptr));
-    if (other) other->incStrong(this);
+    if (other) {
+        check_not_on_stack(other);
+        other->incStrong(this);
+    }
     if (oldPtr) oldPtr->decStrong(this);
     if (oldPtr != *const_cast<T* volatile*>(&m_ptr)) sp_report_race();
     m_ptr = other;
diff --git a/libutils/include/utils/Trace.h b/libutils/include/utils/Trace.h
index 4b9c91e..9986bf5 100644
--- a/libutils/include/utils/Trace.h
+++ b/libutils/include/utils/Trace.h
@@ -17,7 +17,12 @@
 #ifndef ANDROID_TRACE_H
 #define ANDROID_TRACE_H
 
-#if defined(__ANDROID__)
+#if defined(_WIN32)
+
+#define ATRACE_NAME(...)
+#define ATRACE_CALL()
+
+#else  // !_WIN32
 
 #include <stdint.h>
 
@@ -28,7 +33,7 @@
 // ATRACE_NAME traces from its location until the end of its enclosing scope.
 #define _PASTE(x, y) x ## y
 #define PASTE(x, y) _PASTE(x,y)
-#define ATRACE_NAME(name) android::ScopedTrace PASTE(___tracer, __LINE__) (ATRACE_TAG, name)
+#define ATRACE_NAME(name) ::android::ScopedTrace PASTE(___tracer, __LINE__)(ATRACE_TAG, name)
 
 // ATRACE_CALL is an ATRACE_NAME that uses the current function name.
 #define ATRACE_CALL() ATRACE_NAME(__FUNCTION__)
@@ -51,11 +56,6 @@
 
 }  // namespace android
 
-#else // !__ANDROID__
-
-#define ATRACE_NAME(...)
-#define ATRACE_CALL()
-
-#endif // __ANDROID__
+#endif  // _WIN32
 
 #endif // ANDROID_TRACE_H
diff --git a/libvndksupport/libvndksupport.map.txt b/libvndksupport/libvndksupport.map.txt
index ac9a99c..a44ed18 100644
--- a/libvndksupport/libvndksupport.map.txt
+++ b/libvndksupport/libvndksupport.map.txt
@@ -1,8 +1,8 @@
 LIBVNDKSUPPORT {
   global:
-    android_is_in_vendor_process; # vndk apex
-    android_load_sphal_library; # vndk apex
-    android_unload_sphal_library; # vndk apex
+    android_is_in_vendor_process; # llndk apex
+    android_load_sphal_library; # llndk apex
+    android_unload_sphal_library; # llndk apex
   local:
     *;
 };
diff --git a/libziparchive/Android.bp b/libziparchive/Android.bp
index 0253f2f..e3bb2ab 100644
--- a/libziparchive/Android.bp
+++ b/libziparchive/Android.bp
@@ -175,7 +175,7 @@
 }
 
 cc_binary {
-    name: "unzip",
+    name: "ziptool",
     defaults: ["libziparchive_flags"],
     srcs: ["unzip.cpp"],
     shared_libs: [
@@ -183,4 +183,18 @@
         "libziparchive",
     ],
     recovery_available: true,
+    host_supported: true,
+    target: {
+        android: {
+            symlinks: ["unzip", "zipinfo"],
+        },
+    },
+}
+
+cc_fuzz {
+    name: "libziparchive_fuzzer",
+    srcs: ["libziparchive_fuzzer.cpp"],
+    static_libs: ["libziparchive", "libbase", "libz", "liblog"],
+    host_supported: true,
+    corpus: ["testdata/*"],
 }
diff --git a/libziparchive/include/ziparchive/zip_archive.h b/libziparchive/include/ziparchive/zip_archive.h
index e3ac114..047af90 100644
--- a/libziparchive/include/ziparchive/zip_archive.h
+++ b/libziparchive/include/ziparchive/zip_archive.h
@@ -40,8 +40,8 @@
  * Represents information about a zip entry in a zip file.
  */
 struct ZipEntry {
-  // Compression method: One of kCompressStored or
-  // kCompressDeflated.
+  // Compression method. One of kCompressStored or kCompressDeflated.
+  // See also `gpbf` for deflate subtypes.
   uint16_t method;
 
   // Modification time. The zipfile format specifies
@@ -55,7 +55,7 @@
   struct tm GetModificationTime() const;
 
   // Suggested Unix mode for this entry, from the zip archive if created on
-  // Unix, or a default otherwise.
+  // Unix, or a default otherwise. See also `external_file_attributes`.
   mode_t unix_mode;
 
   // 1 if this entry contains a data descriptor segment, 0
@@ -79,6 +79,18 @@
 
   // The offset to the start of data for this ZipEntry.
   off64_t offset;
+
+  // The version of zip and the host file system this came from (for zipinfo).
+  uint16_t version_made_by;
+
+  // The raw attributes, whose interpretation depends on the host
+  // file system in `version_made_by` (for zipinfo). See also `unix_mode`.
+  uint32_t external_file_attributes;
+
+  // Specifics about the deflation (for zipinfo).
+  uint16_t gpbf;
+  // Whether this entry is believed to be text or binary (for zipinfo).
+  bool is_text;
 };
 
 struct ZipArchive;
@@ -114,7 +126,7 @@
 int32_t OpenArchiveFd(const int fd, const char* debugFileName, ZipArchiveHandle* handle,
                       bool assume_ownership = true);
 
-int32_t OpenArchiveFromMemory(void* address, size_t length, const char* debugFileName,
+int32_t OpenArchiveFromMemory(const void* address, size_t length, const char* debugFileName,
                               ZipArchiveHandle* handle);
 /*
  * Close archive, releasing resources associated with it. This will
@@ -125,6 +137,19 @@
  */
 void CloseArchive(ZipArchiveHandle archive);
 
+/** See GetArchiveInfo(). */
+struct ZipArchiveInfo {
+  /** The size in bytes of the archive itself. Used by zipinfo. */
+  off64_t archive_size;
+  /** The number of entries in the archive. */
+  size_t entry_count;
+};
+
+/**
+ * Returns information about the given archive.
+ */
+ZipArchiveInfo GetArchiveInfo(ZipArchiveHandle archive);
+
 /*
  * Find an entry in the Zip archive, by name. |data| must be non-null.
  *
diff --git a/libziparchive/libziparchive_fuzzer.cpp b/libziparchive/libziparchive_fuzzer.cpp
new file mode 100644
index 0000000..75e7939
--- /dev/null
+++ b/libziparchive/libziparchive_fuzzer.cpp
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: Apache-2.0
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <ziparchive/zip_archive.h>
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  ZipArchiveHandle handle = nullptr;
+  OpenArchiveFromMemory(data, size, "fuzz", &handle);
+  CloseArchive(handle);
+  return 0;
+}
diff --git a/libziparchive/unzip.cpp b/libziparchive/unzip.cpp
index 426325e..11b575e 100644
--- a/libziparchive/unzip.cpp
+++ b/libziparchive/unzip.cpp
@@ -15,11 +15,12 @@
  */
 
 #include <errno.h>
-#include <error.h>
 #include <fcntl.h>
 #include <fnmatch.h>
 #include <getopt.h>
 #include <inttypes.h>
+#include <libgen.h>
+#include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/stat.h>
@@ -34,18 +35,29 @@
 #include <android-base/strings.h>
 #include <ziparchive/zip_archive.h>
 
+using android::base::EndsWith;
+using android::base::StartsWith;
+
 enum OverwriteMode {
   kAlways,
   kNever,
   kPrompt,
 };
 
+enum Role {
+  kUnzip,
+  kZipinfo,
+};
+
+static Role role;
 static OverwriteMode overwrite_mode = kPrompt;
+static bool flag_1 = false;
 static const char* flag_d = nullptr;
 static bool flag_l = false;
 static bool flag_p = false;
 static bool flag_q = false;
 static bool flag_v = false;
+static bool flag_x = false;
 static const char* archive_name = nullptr;
 static std::set<std::string> includes;
 static std::set<std::string> excludes;
@@ -53,6 +65,20 @@
 static uint64_t total_compressed_length = 0;
 static size_t file_count = 0;
 
+static const char* g_progname;
+
+static void die(int error, const char* fmt, ...) {
+  va_list ap;
+
+  va_start(ap, fmt);
+  fprintf(stderr, "%s: ", g_progname);
+  vfprintf(stderr, fmt, ap);
+  if (error != 0) fprintf(stderr, ": %s", strerror(error));
+  fprintf(stderr, "\n");
+  va_end(ap);
+  exit(1);
+}
+
 static bool ShouldInclude(const std::string& name) {
   // Explicitly excluded?
   if (!excludes.empty()) {
@@ -83,37 +109,57 @@
   return (mkdir(path.c_str(), 0777) != -1);
 }
 
-static int CompressionRatio(int64_t uncompressed, int64_t compressed) {
+static float CompressionRatio(int64_t uncompressed, int64_t compressed) {
   if (uncompressed == 0) return 0;
-  return static_cast<int>((100LL * (uncompressed - compressed)) / uncompressed);
+  return static_cast<float>(100LL * (uncompressed - compressed)) /
+         static_cast<float>(uncompressed);
 }
 
-static void MaybeShowHeader() {
-  if (!flag_q) printf("Archive:  %s\n", archive_name);
-  if (flag_v) {
-    printf(
-        " Length   Method    Size  Cmpr    Date    Time   CRC-32   Name\n"
-        "--------  ------  ------- ---- ---------- ----- --------  ----\n");
-  } else if (flag_l) {
-    printf(
-        "  Length      Date    Time    Name\n"
-        "---------  ---------- -----   ----\n");
+static void MaybeShowHeader(ZipArchiveHandle zah) {
+  if (role == kUnzip) {
+    // unzip has three formats.
+    if (!flag_q) printf("Archive:  %s\n", archive_name);
+    if (flag_v) {
+      printf(
+          " Length   Method    Size  Cmpr    Date    Time   CRC-32   Name\n"
+          "--------  ------  ------- ---- ---------- ----- --------  ----\n");
+    } else if (flag_l) {
+      printf(
+          "  Length      Date    Time    Name\n"
+          "---------  ---------- -----   ----\n");
+    }
+  } else {
+    // zipinfo.
+    if (!flag_1 && includes.empty() && excludes.empty()) {
+      ZipArchiveInfo info{GetArchiveInfo(zah)};
+      printf("Archive:  %s\n", archive_name);
+      printf("Zip file size: %" PRId64 " bytes, number of entries: %zu\n", info.archive_size,
+             info.entry_count);
+    }
   }
 }
 
 static void MaybeShowFooter() {
-  if (flag_v) {
-    printf(
-        "--------          -------  ---                            -------\n"
-        "%8" PRId64 "         %8" PRId64 " %3d%%                            %zu file%s\n",
-        total_uncompressed_length, total_compressed_length,
-        CompressionRatio(total_uncompressed_length, total_compressed_length), file_count,
-        (file_count == 1) ? "" : "s");
-  } else if (flag_l) {
-    printf(
-        "---------                     -------\n"
-        "%9" PRId64 "                     %zu file%s\n",
-        total_uncompressed_length, file_count, (file_count == 1) ? "" : "s");
+  if (role == kUnzip) {
+    if (flag_v) {
+      printf(
+          "--------          -------  ---                            -------\n"
+          "%8" PRId64 "         %8" PRId64 " %3.0f%%                            %zu file%s\n",
+          total_uncompressed_length, total_compressed_length,
+          CompressionRatio(total_uncompressed_length, total_compressed_length), file_count,
+          (file_count == 1) ? "" : "s");
+    } else if (flag_l) {
+      printf(
+          "---------                     -------\n"
+          "%9" PRId64 "                     %zu file%s\n",
+          total_uncompressed_length, file_count, (file_count == 1) ? "" : "s");
+    }
+  } else {
+    if (!flag_1 && includes.empty() && excludes.empty()) {
+      printf("%zu files, %" PRId64 " bytes uncompressed, %" PRId64 " bytes compressed:  %.1f%%\n",
+             file_count, total_uncompressed_length, total_compressed_length,
+             CompressionRatio(total_uncompressed_length, total_compressed_length));
+    }
   }
 }
 
@@ -125,7 +171,7 @@
     char* line = nullptr;
     size_t n;
     if (getline(&line, &n, stdin) == -1) {
-      error(1, 0, "(EOF/read error; assuming [N]one...)");
+      die(0, "(EOF/read error; assuming [N]one...)");
       overwrite_mode = kNever;
       return false;
     }
@@ -153,43 +199,42 @@
   uint8_t* buffer = new uint8_t[entry.uncompressed_length];
   int err = ExtractToMemory(zah, &entry, buffer, entry.uncompressed_length);
   if (err < 0) {
-    error(1, 0, "failed to extract %s: %s", name.c_str(), ErrorCodeString(err));
+    die(0, "failed to extract %s: %s", name.c_str(), ErrorCodeString(err));
   }
   if (!android::base::WriteFully(1, buffer, entry.uncompressed_length)) {
-    error(1, errno, "failed to write %s to stdout", name.c_str());
+    die(errno, "failed to write %s to stdout", name.c_str());
   }
   delete[] buffer;
 }
 
 static void ExtractOne(ZipArchiveHandle zah, ZipEntry& entry, const std::string& name) {
   // Bad filename?
-  if (android::base::StartsWith(name, "/") || android::base::StartsWith(name, "../") ||
-      name.find("/../") != std::string::npos) {
-    error(1, 0, "bad filename %s", name.c_str());
+  if (StartsWith(name, "/") || StartsWith(name, "../") || name.find("/../") != std::string::npos) {
+    die(0, "bad filename %s", name.c_str());
   }
 
   // Where are we actually extracting to (for human-readable output)?
   std::string dst;
   if (flag_d) {
     dst = flag_d;
-    if (!android::base::EndsWith(dst, "/")) dst += '/';
+    if (!EndsWith(dst, "/")) dst += '/';
   }
   dst += name;
 
   // Ensure the directory hierarchy exists.
   if (!MakeDirectoryHierarchy(android::base::Dirname(name))) {
-    error(1, errno, "couldn't create directory hierarchy for %s", dst.c_str());
+    die(errno, "couldn't create directory hierarchy for %s", dst.c_str());
   }
 
   // An entry in a zip file can just be a directory itself.
-  if (android::base::EndsWith(name, "/")) {
+  if (EndsWith(name, "/")) {
     if (mkdir(name.c_str(), entry.unix_mode) == -1) {
       // If the directory already exists, that's fine.
       if (errno == EEXIST) {
         struct stat sb;
         if (stat(name.c_str(), &sb) != -1 && S_ISDIR(sb.st_mode)) return;
       }
-      error(1, errno, "couldn't extract directory %s", dst.c_str());
+      die(errno, "couldn't extract directory %s", dst.c_str());
     }
     return;
   }
@@ -202,12 +247,12 @@
     // Either overwrite_mode is kAlways or the user consented to this specific case.
     fd = open(name.c_str(), O_WRONLY | O_CREAT | O_CLOEXEC | O_TRUNC, entry.unix_mode);
   }
-  if (fd == -1) error(1, errno, "couldn't create file %s", dst.c_str());
+  if (fd == -1) die(errno, "couldn't create file %s", dst.c_str());
 
   // Actually extract into the file.
   if (!flag_q) printf("  inflating: %s\n", dst.c_str());
   int err = ExtractEntryToFile(zah, &entry, fd);
-  if (err < 0) error(1, 0, "failed to extract %s: %s", dst.c_str(), ErrorCodeString(err));
+  if (err < 0) die(0, "failed to extract %s: %s", dst.c_str(), ErrorCodeString(err));
   close(fd);
 }
 
@@ -217,7 +262,7 @@
   snprintf(time, sizeof(time), "%04d-%02d-%02d %02d:%02d", t.tm_year + 1900, t.tm_mon + 1,
            t.tm_mday, t.tm_hour, t.tm_min);
   if (flag_v) {
-    printf("%8d  %s  %7d %3d%% %s %08x  %s\n", entry.uncompressed_length,
+    printf("%8d  %s  %7d %3.0f%% %s %08x  %s\n", entry.uncompressed_length,
            (entry.method == kCompressStored) ? "Stored" : "Defl:N", entry.compressed_length,
            CompressionRatio(entry.uncompressed_length, entry.compressed_length), time, entry.crc32,
            name.c_str());
@@ -226,17 +271,82 @@
   }
 }
 
+static void InfoOne(const ZipEntry& entry, const std::string& name) {
+  if (flag_1) {
+    // "android-ndk-r19b/sources/android/NOTICE"
+    printf("%s\n", name.c_str());
+    return;
+  }
+
+  int version = entry.version_made_by & 0xff;
+  int os = (entry.version_made_by >> 8) & 0xff;
+
+  // TODO: Support suid/sgid? Non-Unix/non-FAT host file system attributes?
+  const char* src_fs = "???";
+  char mode[] = "???       ";
+  if (os == 0) {
+    src_fs = "fat";
+    // https://docs.microsoft.com/en-us/windows/win32/fileio/file-attribute-constants
+    int attrs = entry.external_file_attributes & 0xff;
+    mode[0] = (attrs & 0x10) ? 'd' : '-';
+    mode[1] = 'r';
+    mode[2] = (attrs & 0x01) ? '-' : 'w';
+    // The man page also mentions ".btm", but that seems to be obsolete?
+    mode[3] = EndsWith(name, ".exe") || EndsWith(name, ".com") || EndsWith(name, ".bat") ||
+                      EndsWith(name, ".cmd")
+                  ? 'x'
+                  : '-';
+    mode[4] = (attrs & 0x20) ? 'a' : '-';
+    mode[5] = (attrs & 0x02) ? 'h' : '-';
+    mode[6] = (attrs & 0x04) ? 's' : '-';
+  } else if (os == 3) {
+    src_fs = "unx";
+    mode[0] = S_ISDIR(entry.unix_mode) ? 'd' : (S_ISREG(entry.unix_mode) ? '-' : '?');
+    mode[1] = entry.unix_mode & S_IRUSR ? 'r' : '-';
+    mode[2] = entry.unix_mode & S_IWUSR ? 'w' : '-';
+    mode[3] = entry.unix_mode & S_IXUSR ? 'x' : '-';
+    mode[4] = entry.unix_mode & S_IRGRP ? 'r' : '-';
+    mode[5] = entry.unix_mode & S_IWGRP ? 'w' : '-';
+    mode[6] = entry.unix_mode & S_IXGRP ? 'x' : '-';
+    mode[7] = entry.unix_mode & S_IROTH ? 'r' : '-';
+    mode[8] = entry.unix_mode & S_IWOTH ? 'w' : '-';
+    mode[9] = entry.unix_mode & S_IXOTH ? 'x' : '-';
+  }
+
+  char method[5] = "stor";
+  if (entry.method == kCompressDeflated) {
+    snprintf(method, sizeof(method), "def%c", "NXFS"[(entry.gpbf >> 1) & 0x3]);
+  }
+
+  // TODO: zipinfo (unlike unzip) sometimes uses time zone?
+  // TODO: this uses 4-digit years because we're not barbarians unless interoperability forces it.
+  tm t = entry.GetModificationTime();
+  char time[32];
+  snprintf(time, sizeof(time), "%04d-%02d-%02d %02d:%02d", t.tm_year + 1900, t.tm_mon + 1,
+           t.tm_mday, t.tm_hour, t.tm_min);
+
+  // "-rw-r--r--  3.0 unx      577 t- defX 19-Feb-12 16:09 android-ndk-r19b/sources/android/NOTICE"
+  printf("%s %2d.%d %s %8d %c%c %s %s %s\n", mode, version / 10, version % 10, src_fs,
+         entry.uncompressed_length, entry.is_text ? 't' : 'b',
+         entry.has_data_descriptor ? 'X' : 'x', method, time, name.c_str());
+}
+
 static void ProcessOne(ZipArchiveHandle zah, ZipEntry& entry, const std::string& name) {
-  if (flag_l || flag_v) {
-    // -l or -lv or -lq or -v.
-    ListOne(entry, name);
-  } else {
-    // Actually extract.
-    if (flag_p) {
-      ExtractToPipe(zah, entry, name);
+  if (role == kUnzip) {
+    if (flag_l || flag_v) {
+      // -l or -lv or -lq or -v.
+      ListOne(entry, name);
     } else {
-      ExtractOne(zah, entry, name);
+      // Actually extract.
+      if (flag_p) {
+        ExtractToPipe(zah, entry, name);
+      } else {
+        ExtractOne(zah, entry, name);
+      }
     }
+  } else {
+    // zipinfo or zipinfo -1.
+    InfoOne(entry, name);
   }
   total_uncompressed_length += entry.uncompressed_length;
   total_compressed_length += entry.compressed_length;
@@ -244,14 +354,14 @@
 }
 
 static void ProcessAll(ZipArchiveHandle zah) {
-  MaybeShowHeader();
+  MaybeShowHeader(zah);
 
   // libziparchive iteration order doesn't match the central directory.
   // We could sort, but that would cost extra and wouldn't match either.
   void* cookie;
   int err = StartIteration(zah, &cookie);
   if (err != 0) {
-    error(1, 0, "couldn't iterate %s: %s", archive_name, ErrorCodeString(err));
+    die(0, "couldn't iterate %s: %s", archive_name, ErrorCodeString(err));
   }
 
   ZipEntry entry;
@@ -260,96 +370,150 @@
     if (ShouldInclude(name)) ProcessOne(zah, entry, name);
   }
 
-  if (err < -1) error(1, 0, "failed iterating %s: %s", archive_name, ErrorCodeString(err));
+  if (err < -1) die(0, "failed iterating %s: %s", archive_name, ErrorCodeString(err));
   EndIteration(cookie);
 
   MaybeShowFooter();
 }
 
 static void ShowHelp(bool full) {
-  fprintf(full ? stdout : stderr, "usage: unzip [-d DIR] [-lnopqv] ZIP [FILE...] [-x FILE...]\n");
-  if (!full) exit(EXIT_FAILURE);
+  if (role == kUnzip) {
+    fprintf(full ? stdout : stderr, "usage: unzip [-d DIR] [-lnopqv] ZIP [FILE...] [-x FILE...]\n");
+    if (!full) exit(EXIT_FAILURE);
 
-  printf(
-      "\n"
-      "Extract FILEs from ZIP archive. Default is all files. Both the include and\n"
-      "exclude (-x) lists use shell glob patterns.\n"
-      "\n"
-      "-d DIR	Extract into DIR\n"
-      "-l	List contents (-lq excludes archive name, -lv is verbose)\n"
-      "-n	Never overwrite files (default: prompt)\n"
-      "-o	Always overwrite files\n"
-      "-p	Pipe to stdout\n"
-      "-q	Quiet\n"
-      "-v	List contents verbosely\n"
-      "-x FILE	Exclude files\n");
+    printf(
+        "\n"
+        "Extract FILEs from ZIP archive. Default is all files. Both the include and\n"
+        "exclude (-x) lists use shell glob patterns.\n"
+        "\n"
+        "-d DIR	Extract into DIR\n"
+        "-l	List contents (-lq excludes archive name, -lv is verbose)\n"
+        "-n	Never overwrite files (default: prompt)\n"
+        "-o	Always overwrite files\n"
+        "-p	Pipe to stdout\n"
+        "-q	Quiet\n"
+        "-v	List contents verbosely\n"
+        "-x FILE	Exclude files\n");
+  } else {
+    fprintf(full ? stdout : stderr, "usage: zipinfo [-1] ZIP [FILE...] [-x FILE...]\n");
+    if (!full) exit(EXIT_FAILURE);
+
+    printf(
+        "\n"
+        "Show information about FILEs from ZIP archive. Default is all files.\n"
+        "Both the include and exclude (-x) lists use shell glob patterns.\n"
+        "\n"
+        "-1	Show filenames only, one per line\n"
+        "-x FILE	Exclude files\n");
+  }
   exit(EXIT_SUCCESS);
 }
 
+static void HandleCommonOption(int opt) {
+  switch (opt) {
+    case 'h':
+      ShowHelp(true);
+      break;
+    case 'x':
+      flag_x = true;
+      break;
+    case 1:
+      // -x swallows all following arguments, so we use '-' in the getopt
+      // string and collect files here.
+      if (!archive_name) {
+        archive_name = optarg;
+      } else if (flag_x) {
+        excludes.insert(optarg);
+      } else {
+        includes.insert(optarg);
+      }
+      break;
+    default:
+      ShowHelp(false);
+      break;
+  }
+}
+
 int main(int argc, char* argv[]) {
-  static struct option opts[] = {
+  // Who am I, and what am I doing?
+  g_progname = basename(argv[0]);
+  if (!strcmp(g_progname, "ziptool") && argc > 1) return main(argc - 1, argv + 1);
+  if (!strcmp(g_progname, "unzip")) {
+    role = kUnzip;
+  } else if (!strcmp(g_progname, "zipinfo")) {
+    role = kZipinfo;
+  } else {
+    die(0, "run as ziptool with unzip or zipinfo as the first argument, or symlink");
+  }
+
+  static const struct option opts[] = {
       {"help", no_argument, 0, 'h'},
+      {},
   };
-  bool saw_x = false;
-  int opt;
-  while ((opt = getopt_long(argc, argv, "-d:hlnopqvx", opts, nullptr)) != -1) {
-    switch (opt) {
-      case 'd':
-        flag_d = optarg;
-        break;
-      case 'h':
-        ShowHelp(true);
-        break;
-      case 'l':
-        flag_l = true;
-        break;
-      case 'n':
-        overwrite_mode = kNever;
-        break;
-      case 'o':
-        overwrite_mode = kAlways;
-        break;
-      case 'p':
-        flag_p = flag_q = true;
-        break;
-      case 'q':
-        flag_q = true;
-        break;
-      case 'v':
-        flag_v = true;
-        break;
-      case 'x':
-        saw_x = true;
-        break;
-      case 1:
-        // -x swallows all following arguments, so we use '-' in the getopt
-        // string and collect files here.
-        if (!archive_name) {
-          archive_name = optarg;
-        } else if (saw_x) {
-          excludes.insert(optarg);
-        } else {
-          includes.insert(optarg);
-        }
-        break;
-      default:
-        ShowHelp(false);
+
+  if (role == kUnzip) {
+    // `unzip -Z` is "zipinfo mode", so in that case just restart...
+    if (argc > 1 && !strcmp(argv[1], "-Z")) {
+      argv[1] = const_cast<char*>("zipinfo");
+      return main(argc - 1, argv + 1);
+    }
+
+    int opt;
+    while ((opt = getopt_long(argc, argv, "-d:hlnopqvx", opts, nullptr)) != -1) {
+      switch (opt) {
+        case 'd':
+          flag_d = optarg;
+          break;
+        case 'l':
+          flag_l = true;
+          break;
+        case 'n':
+          overwrite_mode = kNever;
+          break;
+        case 'o':
+          overwrite_mode = kAlways;
+          break;
+        case 'p':
+          flag_p = flag_q = true;
+          break;
+        case 'q':
+          flag_q = true;
+          break;
+        case 'v':
+          flag_v = true;
+          break;
+        default:
+          HandleCommonOption(opt);
+          break;
+      }
+    }
+  } else {
+    int opt;
+    while ((opt = getopt_long(argc, argv, "-1hx", opts, nullptr)) != -1) {
+      switch (opt) {
+        case '1':
+          flag_1 = true;
+          break;
+        default:
+          HandleCommonOption(opt);
+          break;
+      }
     }
   }
 
-  if (!archive_name) error(1, 0, "missing archive filename");
+  if (!archive_name) die(0, "missing archive filename");
 
   // We can't support "-" to unzip from stdin because libziparchive relies on mmap.
   ZipArchiveHandle zah;
   int32_t err;
   if ((err = OpenArchive(archive_name, &zah)) != 0) {
-    error(1, 0, "couldn't open %s: %s", archive_name, ErrorCodeString(err));
+    die(0, "couldn't open %s: %s", archive_name, ErrorCodeString(err));
   }
 
   // Implement -d by changing into that directory.
   // We'll create implicit directories based on paths in the zip file, but we
   // require that the -d directory already exists.
-  if (flag_d && chdir(flag_d) == -1) error(1, errno, "couldn't chdir to %s", flag_d);
+  if (flag_d && chdir(flag_d) == -1) die(errno, "couldn't chdir to %s", flag_d);
 
   ProcessAll(zah);
 
diff --git a/libziparchive/zip_archive.cc b/libziparchive/zip_archive.cc
index c95b035..ef29188 100644
--- a/libziparchive/zip_archive.cc
+++ b/libziparchive/zip_archive.cc
@@ -178,7 +178,7 @@
 #endif
 }
 
-ZipArchive::ZipArchive(void* address, size_t length)
+ZipArchive::ZipArchive(const void* address, size_t length)
     : mapped_zip(address, length),
       close_file(false),
       directory_offset(0),
@@ -471,13 +471,20 @@
   return OpenArchiveInternal(archive, fileName);
 }
 
-int32_t OpenArchiveFromMemory(void* address, size_t length, const char* debug_file_name,
+int32_t OpenArchiveFromMemory(const void* address, size_t length, const char* debug_file_name,
                               ZipArchiveHandle* handle) {
   ZipArchive* archive = new ZipArchive(address, length);
   *handle = archive;
   return OpenArchiveInternal(archive, debug_file_name);
 }
 
+ZipArchiveInfo GetArchiveInfo(ZipArchiveHandle archive) {
+  ZipArchiveInfo result;
+  result.archive_size = archive->mapped_zip.GetFileLength();
+  result.entry_count = archive->num_entries;
+  return result;
+}
+
 /*
  * Close a ZipArchive, closing the file and freeing the contents.
  */
@@ -614,12 +621,21 @@
   }
 
   // 4.4.2.1: the upper byte of `version_made_by` gives the source OS. Unix is 3.
-  if ((cdr->version_made_by >> 8) == 3) {
+  data->version_made_by = cdr->version_made_by;
+  data->external_file_attributes = cdr->external_file_attributes;
+  if ((data->version_made_by >> 8) == 3) {
     data->unix_mode = (cdr->external_file_attributes >> 16) & 0xffff;
   } else {
     data->unix_mode = 0777;
   }
 
+  // 4.4.4: general purpose bit flags.
+  data->gpbf = lfh->gpb_flags;
+
+  // 4.4.14: the lowest bit of the internal file attributes field indicates text.
+  // Currently only needed to implement zipinfo.
+  data->is_text = (cdr->internal_file_attributes & 1);
+
   // Check that the local file header name matches the declared
   // name in the central directory.
   if (lfh->file_name_length != nameLen) {
@@ -1152,7 +1168,7 @@
   return fd_;
 }
 
-void* MappedZipFile::GetBasePtr() const {
+const void* MappedZipFile::GetBasePtr() const {
   if (has_fd_) {
     ALOGW("Zip: MappedZipFile doesn't have a base pointer.");
     return nullptr;
@@ -1188,13 +1204,14 @@
       ALOGE("Zip: invalid offset: %" PRId64 ", data length: %" PRId64 "\n", off, data_length_);
       return false;
     }
-    memcpy(buf, static_cast<uint8_t*>(base_ptr_) + off, len);
+    memcpy(buf, static_cast<const uint8_t*>(base_ptr_) + off, len);
   }
   return true;
 }
 
-void CentralDirectory::Initialize(void* map_base_ptr, off64_t cd_start_offset, size_t cd_size) {
-  base_ptr_ = static_cast<uint8_t*>(map_base_ptr) + cd_start_offset;
+void CentralDirectory::Initialize(const void* map_base_ptr, off64_t cd_start_offset,
+                                  size_t cd_size) {
+  base_ptr_ = static_cast<const uint8_t*>(map_base_ptr) + cd_start_offset;
   length_ = cd_size;
 }
 
diff --git a/libziparchive/zip_archive_private.h b/libziparchive/zip_archive_private.h
index 30a1d72..60fdec0 100644
--- a/libziparchive/zip_archive_private.h
+++ b/libziparchive/zip_archive_private.h
@@ -95,14 +95,14 @@
   explicit MappedZipFile(const int fd)
       : has_fd_(true), fd_(fd), base_ptr_(nullptr), data_length_(0) {}
 
-  explicit MappedZipFile(void* address, size_t length)
+  explicit MappedZipFile(const void* address, size_t length)
       : has_fd_(false), fd_(-1), base_ptr_(address), data_length_(static_cast<off64_t>(length)) {}
 
   bool HasFd() const { return has_fd_; }
 
   int GetFileDescriptor() const;
 
-  void* GetBasePtr() const;
+  const void* GetBasePtr() const;
 
   off64_t GetFileLength() const;
 
@@ -117,7 +117,7 @@
 
   const int fd_;
 
-  void* const base_ptr_;
+  const void* const base_ptr_;
   const off64_t data_length_;
 };
 
@@ -129,7 +129,7 @@
 
   size_t GetMapLength() const { return length_; }
 
-  void Initialize(void* map_base_ptr, off64_t cd_start_offset, size_t cd_size);
+  void Initialize(const void* map_base_ptr, off64_t cd_start_offset, size_t cd_size);
 
  private:
   const uint8_t* base_ptr_;
@@ -177,7 +177,7 @@
   ZipStringOffset* hash_table;
 
   ZipArchive(const int fd, bool assume_ownership);
-  ZipArchive(void* address, size_t length);
+  ZipArchive(const void* address, size_t length);
   ~ZipArchive();
 
   bool InitializeCentralDirectory(off64_t cd_start_offset, size_t cd_size);
diff --git a/lmkd/Android.bp b/lmkd/Android.bp
deleted file mode 100644
index 4c5ca03..0000000
--- a/lmkd/Android.bp
+++ /dev/null
@@ -1,53 +0,0 @@
-cc_binary {
-    name: "lmkd",
-
-    srcs: ["lmkd.c"],
-    shared_libs: [
-        "libcutils",
-        "liblog",
-        "libprocessgroup",
-        "libpsi",
-    ],
-    static_libs: [
-        "libstatslogc",
-        "libstatssocket",
-    ],
-    local_include_dirs: ["include"],
-    cflags: ["-Werror", "-DLMKD_TRACE_KILLS"],
-    init_rc: ["lmkd.rc"],
-    product_variables: {
-        use_lmkd_stats_log: {
-            cflags: [
-                "-DLMKD_LOG_STATS"
-            ],
-        },
-    },
-    logtags: ["event.logtags"],
-}
-
-cc_library_static {
-    name: "libstatslogc",
-    srcs: ["statslog.c"],
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-    shared_libs: [
-        "liblog",
-    ],
-    static_libs: ["libstatssocket",],
-}
-
-cc_library_static {
-    name: "liblmkd_utils",
-    srcs: ["liblmkd_utils.c"],
-    shared_libs: [
-        "libcutils",
-    ],
-    export_include_dirs: ["include"],
-    cppflags: [
-        "-g",
-        "-Wall",
-        "-Werror",
-    ]
-}
diff --git a/lmkd/OWNERS b/lmkd/OWNERS
deleted file mode 100644
index b15bb48..0000000
--- a/lmkd/OWNERS
+++ /dev/null
@@ -1 +0,0 @@
-surenb@google.com
diff --git a/lmkd/README.md b/lmkd/README.md
deleted file mode 100644
index 656a6ea..0000000
--- a/lmkd/README.md
+++ /dev/null
@@ -1,65 +0,0 @@
-Android Low Memory Killer Daemon
-================================
-
-
-Introduction
-------------
-
-Android Low Memory Killer Daemon (lmkd) is a process monitoring memory
-state of a running Android system and reacting to high memory pressure
-by killing the least essential process(es) to keep system performing
-at acceptable levels.
-
-
-Background
-----------
-
-Historically on Android systems memory monitoring and killing of
-non-essential processes was handled by a kernel lowmemorykiller driver.
-Since Linux Kernel 4.12 the lowmemorykiller driver has been removed and
-instead userspace lmkd daemon performs these tasks.
-
-
-Android Properties
-------------------
-
-lmkd can be configured on a particular system using the following Android
-properties:
-
-  ro.config.low_ram:         choose between low-memory vs high-performance
-                             device. Default = false.
-
-  ro.lmk.use_minfree_levels: use free memory and file cache thresholds for
-                             making decisions when to kill. This mode works
-                             the same way kernel lowmemorykiller driver used
-                             to work. Default = false
-
-  ro.lmk.low:                min oom_adj score for processes eligible to be
-                             killed at low vmpressure level. Default = 1001
-                             (disabled)
-
-  ro.lmk.medium:             min oom_adj score for processes eligible to be
-                             killed at medium vmpressure level. Default = 800
-                             (non-essential processes)
-
-  ro.lmk.critical:           min oom_adj score for processes eligible to be
-                             killed at critical vmpressure level. Default = 0
-                             (all processes)
-
-  ro.lmk.critical_upgrade:   enables upgrade to critical level. Default = false
-
-  ro.lmk.upgrade_pressure:   max mem_pressure at which level will be upgraded
-                             because system is swapping too much. Default = 100
-                             (disabled)
-
-  ro.lmk.downgrade_pressure: min mem_pressure at which vmpressure event will
-                             be ignored because enough free memory is still
-                             available. Default = 100 (disabled)
-
-  ro.lmk.kill_heaviest_task: kill heaviest eligible task (best decision) vs.
-                             any eligible task (fast decision). Default = false
-
-  ro.lmk.kill_timeout_ms:    duration in ms after a kill when no additional
-                             kill will be done, Default = 0 (disabled)
-
-  ro.lmk.debug:              enable lmkd debug logs, Default = false
diff --git a/lmkd/event.logtags b/lmkd/event.logtags
deleted file mode 100644
index 065c6db..0000000
--- a/lmkd/event.logtags
+++ /dev/null
@@ -1,38 +0,0 @@
-# The entries in this file map a sparse set of log tag numbers to tag names.
-# This is installed on the device, in /system/etc, and parsed by logcat.
-#
-# Tag numbers are decimal integers, from 0 to 2^31.  (Let's leave the
-# negative values alone for now.)
-#
-# Tag names are one or more ASCII letters and numbers or underscores, i.e.
-# "[A-Z][a-z][0-9]_".  Do not include spaces or punctuation (the former
-# impacts log readability, the latter makes regex searches more annoying).
-#
-# Tag numbers and names are separated by whitespace.  Blank lines and lines
-# starting with '#' are ignored.
-#
-# Optionally, after the tag names can be put a description for the value(s)
-# of the tag. Description are in the format
-#    (<name>|data type[|data unit])
-# Multiple values are separated by commas.
-#
-# The data type is a number from the following values:
-# 1: int
-# 2: long
-# 3: string
-# 4: list
-#
-# The data unit is a number taken from the following list:
-# 1: Number of objects
-# 2: Number of bytes
-# 3: Number of milliseconds
-# 4: Number of allocations
-# 5: Id
-# 6: Percent
-# s: Number of seconds (monotonic time)
-# Default value for data of type int/long is 2 (bytes).
-#
-# TODO: generate ".java" and ".h" files with integer constants from this file.
-
-# for meminfo logs
-10195355 meminfo (MemFree|1),(Cached|1),(SwapCached|1),(Buffers|1),(Shmem|1),(Unevictable|1),(SwapTotal|1),(SwapFree|1),(ActiveAnon|1),(InactiveAnon|1),(ActiveFile|1),(InactiveFile|1),(SReclaimable|1),(SUnreclaim|1),(KernelStack|1),(PageTables|1),(ION_heap|1),(ION_heap_pool|1),(CmaFree|1)
diff --git a/lmkd/include/liblmkd_utils.h b/lmkd/include/liblmkd_utils.h
deleted file mode 100644
index 72e3f4a..0000000
--- a/lmkd/include/liblmkd_utils.h
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- *  Copyright 2018 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#ifndef _LIBLMKD_UTILS_H_
-#define _LIBLMKD_UTILS_H_
-
-#include <sys/cdefs.h>
-#include <sys/types.h>
-
-#include <lmkd.h>
-
-__BEGIN_DECLS
-
-/*
- * Connects to lmkd process and returns socket handle.
- * On success returns socket handle.
- * On error, -1 is returned, and errno is set appropriately.
- */
-int lmkd_connect();
-
-/*
- * Registers a process with lmkd and sets its oomadj score.
- * On success returns 0.
- * On error, -1 is returned.
- * In the case of error errno is set appropriately.
- */
-int lmkd_register_proc(int sock, struct lmk_procprio *params);
-
-/*
- * Creates memcg directory for given process.
- * On success returns 0.
- * -1 is returned if path creation failed.
- * -2 is returned if tasks file open operation failed.
- * -3 is returned if tasks file write operation failed.
- * In the case of error errno is set appropriately.
- */
-int create_memcg(uid_t uid, pid_t pid);
-
-__END_DECLS
-
-#endif /* _LIBLMKD_UTILS_H_ */
diff --git a/lmkd/include/lmkd.h b/lmkd/include/lmkd.h
deleted file mode 100644
index 59377dd..0000000
--- a/lmkd/include/lmkd.h
+++ /dev/null
@@ -1,193 +0,0 @@
-/*
- *  Copyright 2018 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#ifndef _LMKD_H_
-#define _LMKD_H_
-
-#include <arpa/inet.h>
-#include <sys/cdefs.h>
-#include <sys/types.h>
-
-__BEGIN_DECLS
-
-/*
- * Supported LMKD commands
- */
-enum lmk_cmd {
-    LMK_TARGET = 0,  /* Associate minfree with oom_adj_score */
-    LMK_PROCPRIO,    /* Register a process and set its oom_adj_score */
-    LMK_PROCREMOVE,  /* Unregister a process */
-    LMK_PROCPURGE,   /* Purge all registered processes */
-    LMK_GETKILLCNT,  /* Get number of kills */
-};
-
-/*
- * Max number of targets in LMK_TARGET command.
- */
-#define MAX_TARGETS 6
-
-/*
- * Max packet length in bytes.
- * Longest packet is LMK_TARGET followed by MAX_TARGETS
- * of minfree and oom_adj_score values
- */
-#define CTRL_PACKET_MAX_SIZE (sizeof(int) * (MAX_TARGETS * 2 + 1))
-
-/* LMKD packet - first int is lmk_cmd followed by payload */
-typedef int LMKD_CTRL_PACKET[CTRL_PACKET_MAX_SIZE / sizeof(int)];
-
-/* Get LMKD packet command */
-static inline enum lmk_cmd lmkd_pack_get_cmd(LMKD_CTRL_PACKET pack) {
-    return (enum lmk_cmd)ntohl(pack[0]);
-}
-
-/* LMK_TARGET packet payload */
-struct lmk_target {
-    int minfree;
-    int oom_adj_score;
-};
-
-/*
- * For LMK_TARGET packet get target_idx-th payload.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline void lmkd_pack_get_target(LMKD_CTRL_PACKET packet, int target_idx,
-                                        struct lmk_target* target) {
-    target->minfree = ntohl(packet[target_idx * 2 + 1]);
-    target->oom_adj_score = ntohl(packet[target_idx * 2 + 2]);
-}
-
-/*
- * Prepare LMK_TARGET packet and return packet size in bytes.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline size_t lmkd_pack_set_target(LMKD_CTRL_PACKET packet, struct lmk_target* targets,
-                                          size_t target_cnt) {
-    int idx = 0;
-    packet[idx++] = htonl(LMK_TARGET);
-    while (target_cnt) {
-        packet[idx++] = htonl(targets->minfree);
-        packet[idx++] = htonl(targets->oom_adj_score);
-        targets++;
-        target_cnt--;
-    }
-    return idx * sizeof(int);
-}
-
-/* LMK_PROCPRIO packet payload */
-struct lmk_procprio {
-    pid_t pid;
-    uid_t uid;
-    int oomadj;
-};
-
-/*
- * For LMK_PROCPRIO packet get its payload.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline void lmkd_pack_get_procprio(LMKD_CTRL_PACKET packet, struct lmk_procprio* params) {
-    params->pid = (pid_t)ntohl(packet[1]);
-    params->uid = (uid_t)ntohl(packet[2]);
-    params->oomadj = ntohl(packet[3]);
-}
-
-/*
- * Prepare LMK_PROCPRIO packet and return packet size in bytes.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline size_t lmkd_pack_set_procprio(LMKD_CTRL_PACKET packet, struct lmk_procprio* params) {
-    packet[0] = htonl(LMK_PROCPRIO);
-    packet[1] = htonl(params->pid);
-    packet[2] = htonl(params->uid);
-    packet[3] = htonl(params->oomadj);
-    return 4 * sizeof(int);
-}
-
-/* LMK_PROCREMOVE packet payload */
-struct lmk_procremove {
-    pid_t pid;
-};
-
-/*
- * For LMK_PROCREMOVE packet get its payload.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline void lmkd_pack_get_procremove(LMKD_CTRL_PACKET packet,
-                                            struct lmk_procremove* params) {
-    params->pid = (pid_t)ntohl(packet[1]);
-}
-
-/*
- * Prepare LMK_PROCREMOVE packet and return packet size in bytes.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline size_t lmkd_pack_set_procremove(LMKD_CTRL_PACKET packet,
-                                              struct lmk_procprio* params) {
-    packet[0] = htonl(LMK_PROCREMOVE);
-    packet[1] = htonl(params->pid);
-    return 2 * sizeof(int);
-}
-
-/*
- * Prepare LMK_PROCPURGE packet and return packet size in bytes.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline size_t lmkd_pack_set_procpurge(LMKD_CTRL_PACKET packet) {
-    packet[0] = htonl(LMK_PROCPURGE);
-    return sizeof(int);
-}
-
-/* LMK_GETKILLCNT packet payload */
-struct lmk_getkillcnt {
-    int min_oomadj;
-    int max_oomadj;
-};
-
-/*
- * For LMK_GETKILLCNT packet get its payload.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline void lmkd_pack_get_getkillcnt(LMKD_CTRL_PACKET packet,
-                                            struct lmk_getkillcnt* params) {
-    params->min_oomadj = ntohl(packet[1]);
-    params->max_oomadj = ntohl(packet[2]);
-}
-
-/*
- * Prepare LMK_GETKILLCNT packet and return packet size in bytes.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline size_t lmkd_pack_set_getkillcnt(LMKD_CTRL_PACKET packet,
-                                              struct lmk_getkillcnt* params) {
-    packet[0] = htonl(LMK_GETKILLCNT);
-    packet[1] = htonl(params->min_oomadj);
-    packet[2] = htonl(params->max_oomadj);
-    return 3 * sizeof(int);
-}
-
-/*
- * Prepare LMK_GETKILLCNT reply packet and return packet size in bytes.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline size_t lmkd_pack_set_getkillcnt_repl(LMKD_CTRL_PACKET packet, int kill_cnt) {
-    packet[0] = htonl(LMK_GETKILLCNT);
-    packet[1] = htonl(kill_cnt);
-    return 2 * sizeof(int);
-}
-
-__END_DECLS
-
-#endif /* _LMKD_H_ */
diff --git a/lmkd/liblmkd_utils.c b/lmkd/liblmkd_utils.c
deleted file mode 100644
index fa3b7a9..0000000
--- a/lmkd/liblmkd_utils.c
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- *  Copyright 2018 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <sys/cdefs.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <stdio.h>
-#include <unistd.h>
-
-#include <liblmkd_utils.h>
-#include <cutils/sockets.h>
-
-int lmkd_connect() {
-    return socket_local_client("lmkd",
-                               ANDROID_SOCKET_NAMESPACE_RESERVED,
-                               SOCK_SEQPACKET);
-}
-
-int lmkd_register_proc(int sock, struct lmk_procprio *params) {
-    LMKD_CTRL_PACKET packet;
-    size_t size;
-    int ret;
-
-    size = lmkd_pack_set_procprio(packet, params);
-    ret = TEMP_FAILURE_RETRY(write(sock, packet, size));
-
-    return (ret < 0) ? -1 : 0;
-}
-
-int create_memcg(uid_t uid, pid_t pid) {
-    char buf[256];
-    int tasks_file;
-    int written;
-
-    snprintf(buf, sizeof(buf), "/dev/memcg/apps/uid_%u", uid);
-    if (mkdir(buf, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH) < 0 &&
-        errno != EEXIST) {
-        return -1;
-    }
-
-    snprintf(buf, sizeof(buf), "/dev/memcg/apps/uid_%u/pid_%u", uid, pid);
-    if (mkdir(buf, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH) < 0 &&
-        errno != EEXIST) {
-        return -1;
-    }
-
-    snprintf(buf, sizeof(buf), "/dev/memcg/apps/uid_%u/pid_%u/tasks", uid, pid);
-    tasks_file = open(buf, O_WRONLY);
-    if (tasks_file < 0) {
-        return -2;
-    }
-    written = snprintf(buf, sizeof(buf), "%u", pid);
-    if (__predict_false(written >= (int)sizeof(buf))) {
-        written = sizeof(buf) - 1;
-    }
-    written = TEMP_FAILURE_RETRY(write(tasks_file, buf, written));
-    close(tasks_file);
-
-    return (written < 0) ? -3 : 0;
-}
-
diff --git a/lmkd/libpsi/Android.bp b/lmkd/libpsi/Android.bp
deleted file mode 100644
index 8a97094..0000000
--- a/lmkd/libpsi/Android.bp
+++ /dev/null
@@ -1,22 +0,0 @@
-cc_library_headers {
-    name: "libpsi_headers",
-    export_include_dirs: ["include"],
-}
-
-cc_library {
-    name: "libpsi",
-    srcs: ["psi.c"],
-    shared_libs: [
-        "liblog"
-    ],
-    header_libs: [
-        "libpsi_headers",
-    ],
-    export_header_lib_headers: [
-        "libpsi_headers",
-    ],
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-}
diff --git a/lmkd/libpsi/OWNERS b/lmkd/libpsi/OWNERS
deleted file mode 100644
index b15bb48..0000000
--- a/lmkd/libpsi/OWNERS
+++ /dev/null
@@ -1 +0,0 @@
-surenb@google.com
diff --git a/lmkd/libpsi/include/psi/psi.h b/lmkd/libpsi/include/psi/psi.h
deleted file mode 100644
index cd49e8b..0000000
--- a/lmkd/libpsi/include/psi/psi.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef __ANDROID_PSI_H__
-#define __ANDROID_PSI_H__
-
-#include <sys/cdefs.h>
-#include <sys/types.h>
-
-__BEGIN_DECLS
-
-enum psi_stall_type {
-    PSI_SOME,
-    PSI_FULL,
-    PSI_TYPE_COUNT
-};
-
-/*
- * Initializes psi monitor.
- * stall_type, threshold_us and window_us are monitor parameters
- * When successful, the function returns file descriptor that can
- * be used with poll/epoll syscalls to wait for EPOLLPRI events.
- * When unsuccessful, the function returns -1 and errno is set
- * appropriately.
- */
-int init_psi_monitor(enum psi_stall_type stall_type,
-        int threshold_us, int window_us);
-
-/*
- * Registers psi monitor file descriptor fd on the epoll instance
- * referred to by the file descriptor epollfd.
- * data parameter will be associated with event's epoll_data.ptr
- * member.
- */
-int register_psi_monitor(int epollfd, int fd, void* data);
-
-/*
- * Unregisters psi monitor file descriptor fd from the epoll instance
- * referred to by the file descriptor epollfd.
- */
-int unregister_psi_monitor(int epollfd, int fd);
-
-/*
- * Destroys psi monitor.
- * fd is the file descriptor returned by psi monitor initialization
- * routine.
- * Note that if user process exits without calling this routine
- * kernel will destroy the monitor as its lifetime is linked to
- * the file descriptor.
- */
-void destroy_psi_monitor(int fd);
-
-__END_DECLS
-
-#endif  // __ANDROID_PSI_H__
diff --git a/lmkd/libpsi/psi.c b/lmkd/libpsi/psi.c
deleted file mode 100644
index f4d5d18..0000000
--- a/lmkd/libpsi/psi.c
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "libpsi"
-
-#include <errno.h>
-#include <string.h>
-#include <sys/epoll.h>
-
-#include <log/log.h>
-#include "psi/psi.h"
-
-#define PSI_MON_FILE_MEMORY "/proc/pressure/memory"
-
-static const char* stall_type_name[] = {
-        "some",
-        "full",
-};
-
-int init_psi_monitor(enum psi_stall_type stall_type,
-             int threshold_us, int window_us) {
-    int fd;
-    int res;
-    char buf[256];
-
-    fd = TEMP_FAILURE_RETRY(open(PSI_MON_FILE_MEMORY, O_WRONLY | O_CLOEXEC));
-    if (fd < 0) {
-        ALOGE("No kernel psi monitor support (errno=%d)", errno);
-        return -1;
-    }
-
-    switch (stall_type) {
-    case (PSI_SOME):
-    case (PSI_FULL):
-        res = snprintf(buf, sizeof(buf), "%s %d %d",
-            stall_type_name[stall_type], threshold_us, window_us);
-        break;
-    default:
-        ALOGE("Invalid psi stall type: %d", stall_type);
-        errno = EINVAL;
-        goto err;
-    }
-
-    if (res >= (ssize_t)sizeof(buf)) {
-        ALOGE("%s line overflow for psi stall type '%s'",
-            PSI_MON_FILE_MEMORY, stall_type_name[stall_type]);
-        errno = EINVAL;
-        goto err;
-    }
-
-    res = TEMP_FAILURE_RETRY(write(fd, buf, strlen(buf) + 1));
-    if (res < 0) {
-        ALOGE("%s write failed for psi stall type '%s'; errno=%d",
-            PSI_MON_FILE_MEMORY, stall_type_name[stall_type], errno);
-        goto err;
-    }
-
-    return fd;
-
-err:
-    close(fd);
-    return -1;
-}
-
-int register_psi_monitor(int epollfd, int fd, void* data) {
-    int res;
-    struct epoll_event epev;
-
-    epev.events = EPOLLPRI;
-    epev.data.ptr = data;
-    res = epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &epev);
-    if (res < 0) {
-        ALOGE("epoll_ctl for psi monitor failed; errno=%d", errno);
-    }
-    return res;
-}
-
-int unregister_psi_monitor(int epollfd, int fd) {
-    return epoll_ctl(epollfd, EPOLL_CTL_DEL, fd, NULL);
-}
-
-void destroy_psi_monitor(int fd) {
-    if (fd >= 0) {
-        close(fd);
-    }
-}
diff --git a/lmkd/lmkd.c b/lmkd/lmkd.c
deleted file mode 100644
index 42af751..0000000
--- a/lmkd/lmkd.c
+++ /dev/null
@@ -1,2232 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "lowmemorykiller"
-
-#include <dirent.h>
-#include <errno.h>
-#include <inttypes.h>
-#include <pwd.h>
-#include <sched.h>
-#include <signal.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/cdefs.h>
-#include <sys/epoll.h>
-#include <sys/eventfd.h>
-#include <sys/mman.h>
-#include <sys/resource.h>
-#include <sys/socket.h>
-#include <sys/sysinfo.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <time.h>
-#include <unistd.h>
-
-#include <cutils/properties.h>
-#include <cutils/sched_policy.h>
-#include <cutils/sockets.h>
-#include <lmkd.h>
-#include <log/log.h>
-#include <log/log_event_list.h>
-#include <log/log_time.h>
-#include <psi/psi.h>
-#include <system/thread_defs.h>
-
-#ifdef LMKD_LOG_STATS
-#include "statslog.h"
-#endif
-
-/*
- * Define LMKD_TRACE_KILLS to record lmkd kills in kernel traces
- * to profile and correlate with OOM kills
- */
-#ifdef LMKD_TRACE_KILLS
-
-#define ATRACE_TAG ATRACE_TAG_ALWAYS
-#include <cutils/trace.h>
-
-#define TRACE_KILL_START(pid) ATRACE_INT(__FUNCTION__, pid);
-#define TRACE_KILL_END()      ATRACE_INT(__FUNCTION__, 0);
-
-#else /* LMKD_TRACE_KILLS */
-
-#define TRACE_KILL_START(pid) ((void)(pid))
-#define TRACE_KILL_END() ((void)0)
-
-#endif /* LMKD_TRACE_KILLS */
-
-#ifndef __unused
-#define __unused __attribute__((__unused__))
-#endif
-
-#define MEMCG_SYSFS_PATH "/dev/memcg/"
-#define MEMCG_MEMORY_USAGE "/dev/memcg/memory.usage_in_bytes"
-#define MEMCG_MEMORYSW_USAGE "/dev/memcg/memory.memsw.usage_in_bytes"
-#define ZONEINFO_PATH "/proc/zoneinfo"
-#define MEMINFO_PATH "/proc/meminfo"
-#define PROC_STATUS_TGID_FIELD "Tgid:"
-#define LINE_MAX 128
-
-/* Android Logger event logtags (see event.logtags) */
-#define MEMINFO_LOG_TAG 10195355
-
-/* gid containing AID_SYSTEM required */
-#define INKERNEL_MINFREE_PATH "/sys/module/lowmemorykiller/parameters/minfree"
-#define INKERNEL_ADJ_PATH "/sys/module/lowmemorykiller/parameters/adj"
-
-#define ARRAY_SIZE(x)   (sizeof(x) / sizeof(*(x)))
-#define EIGHT_MEGA (1 << 23)
-
-#define TARGET_UPDATE_MIN_INTERVAL_MS 1000
-
-#define NS_PER_MS (NS_PER_SEC / MS_PER_SEC)
-#define US_PER_MS (US_PER_SEC / MS_PER_SEC)
-
-/* Defined as ProcessList.SYSTEM_ADJ in ProcessList.java */
-#define SYSTEM_ADJ (-900)
-
-#define STRINGIFY(x) STRINGIFY_INTERNAL(x)
-#define STRINGIFY_INTERNAL(x) #x
-
-/*
- * PSI monitor tracking window size.
- * PSI monitor generates events at most once per window,
- * therefore we poll memory state for the duration of
- * PSI_WINDOW_SIZE_MS after the event happens.
- */
-#define PSI_WINDOW_SIZE_MS 1000
-/* Polling period after initial PSI signal */
-#define PSI_POLL_PERIOD_MS 10
-/* Poll for the duration of one window after initial PSI signal */
-#define PSI_POLL_COUNT (PSI_WINDOW_SIZE_MS / PSI_POLL_PERIOD_MS)
-
-#define min(a, b) (((a) < (b)) ? (a) : (b))
-
-#define FAIL_REPORT_RLIMIT_MS 1000
-
-/* default to old in-kernel interface if no memory pressure events */
-static bool use_inkernel_interface = true;
-static bool has_inkernel_module;
-
-/* memory pressure levels */
-enum vmpressure_level {
-    VMPRESS_LEVEL_LOW = 0,
-    VMPRESS_LEVEL_MEDIUM,
-    VMPRESS_LEVEL_CRITICAL,
-    VMPRESS_LEVEL_COUNT
-};
-
-static const char *level_name[] = {
-    "low",
-    "medium",
-    "critical"
-};
-
-struct {
-    int64_t min_nr_free_pages; /* recorded but not used yet */
-    int64_t max_nr_free_pages;
-} low_pressure_mem = { -1, -1 };
-
-struct psi_threshold {
-    enum psi_stall_type stall_type;
-    int threshold_ms;
-};
-
-static int level_oomadj[VMPRESS_LEVEL_COUNT];
-static int mpevfd[VMPRESS_LEVEL_COUNT] = { -1, -1, -1 };
-static bool debug_process_killing;
-static bool enable_pressure_upgrade;
-static int64_t upgrade_pressure;
-static int64_t downgrade_pressure;
-static bool low_ram_device;
-static bool kill_heaviest_task;
-static unsigned long kill_timeout_ms;
-static bool use_minfree_levels;
-static bool per_app_memcg;
-static int swap_free_low_percentage;
-static bool use_psi_monitors = false;
-static struct psi_threshold psi_thresholds[VMPRESS_LEVEL_COUNT] = {
-    { PSI_SOME, 70 },    /* 70ms out of 1sec for partial stall */
-    { PSI_SOME, 100 },   /* 100ms out of 1sec for partial stall */
-    { PSI_FULL, 70 },    /* 70ms out of 1sec for complete stall */
-};
-
-static android_log_context ctx;
-
-/* data required to handle events */
-struct event_handler_info {
-    int data;
-    void (*handler)(int data, uint32_t events);
-};
-
-/* data required to handle socket events */
-struct sock_event_handler_info {
-    int sock;
-    struct event_handler_info handler_info;
-};
-
-/* max supported number of data connections */
-#define MAX_DATA_CONN 2
-
-/* socket event handler data */
-static struct sock_event_handler_info ctrl_sock;
-static struct sock_event_handler_info data_sock[MAX_DATA_CONN];
-
-/* vmpressure event handler data */
-static struct event_handler_info vmpressure_hinfo[VMPRESS_LEVEL_COUNT];
-
-/* 3 memory pressure levels, 1 ctrl listen socket, 2 ctrl data socket, 1 lmk events */
-#define MAX_EPOLL_EVENTS (2 + MAX_DATA_CONN + VMPRESS_LEVEL_COUNT)
-static int epollfd;
-static int maxevents;
-
-/* OOM score values used by both kernel and framework */
-#define OOM_SCORE_ADJ_MIN       (-1000)
-#define OOM_SCORE_ADJ_MAX       1000
-
-static int lowmem_adj[MAX_TARGETS];
-static int lowmem_minfree[MAX_TARGETS];
-static int lowmem_targets_size;
-
-/* Fields to parse in /proc/zoneinfo */
-enum zoneinfo_field {
-    ZI_NR_FREE_PAGES = 0,
-    ZI_NR_FILE_PAGES,
-    ZI_NR_SHMEM,
-    ZI_NR_UNEVICTABLE,
-    ZI_WORKINGSET_REFAULT,
-    ZI_HIGH,
-    ZI_FIELD_COUNT
-};
-
-static const char* const zoneinfo_field_names[ZI_FIELD_COUNT] = {
-    "nr_free_pages",
-    "nr_file_pages",
-    "nr_shmem",
-    "nr_unevictable",
-    "workingset_refault",
-    "high",
-};
-
-union zoneinfo {
-    struct {
-        int64_t nr_free_pages;
-        int64_t nr_file_pages;
-        int64_t nr_shmem;
-        int64_t nr_unevictable;
-        int64_t workingset_refault;
-        int64_t high;
-        /* fields below are calculated rather than read from the file */
-        int64_t totalreserve_pages;
-    } field;
-    int64_t arr[ZI_FIELD_COUNT];
-};
-
-/* Fields to parse in /proc/meminfo */
-enum meminfo_field {
-    MI_NR_FREE_PAGES = 0,
-    MI_CACHED,
-    MI_SWAP_CACHED,
-    MI_BUFFERS,
-    MI_SHMEM,
-    MI_UNEVICTABLE,
-    MI_TOTAL_SWAP,
-    MI_FREE_SWAP,
-    MI_ACTIVE_ANON,
-    MI_INACTIVE_ANON,
-    MI_ACTIVE_FILE,
-    MI_INACTIVE_FILE,
-    MI_SRECLAIMABLE,
-    MI_SUNRECLAIM,
-    MI_KERNEL_STACK,
-    MI_PAGE_TABLES,
-    MI_ION_HELP,
-    MI_ION_HELP_POOL,
-    MI_CMA_FREE,
-    MI_FIELD_COUNT
-};
-
-static const char* const meminfo_field_names[MI_FIELD_COUNT] = {
-    "MemFree:",
-    "Cached:",
-    "SwapCached:",
-    "Buffers:",
-    "Shmem:",
-    "Unevictable:",
-    "SwapTotal:",
-    "SwapFree:",
-    "Active(anon):",
-    "Inactive(anon):",
-    "Active(file):",
-    "Inactive(file):",
-    "SReclaimable:",
-    "SUnreclaim:",
-    "KernelStack:",
-    "PageTables:",
-    "ION_heap:",
-    "ION_heap_pool:",
-    "CmaFree:",
-};
-
-union meminfo {
-    struct {
-        int64_t nr_free_pages;
-        int64_t cached;
-        int64_t swap_cached;
-        int64_t buffers;
-        int64_t shmem;
-        int64_t unevictable;
-        int64_t total_swap;
-        int64_t free_swap;
-        int64_t active_anon;
-        int64_t inactive_anon;
-        int64_t active_file;
-        int64_t inactive_file;
-        int64_t sreclaimable;
-        int64_t sunreclaimable;
-        int64_t kernel_stack;
-        int64_t page_tables;
-        int64_t ion_heap;
-        int64_t ion_heap_pool;
-        int64_t cma_free;
-        /* fields below are calculated rather than read from the file */
-        int64_t nr_file_pages;
-    } field;
-    int64_t arr[MI_FIELD_COUNT];
-};
-
-enum field_match_result {
-    NO_MATCH,
-    PARSE_FAIL,
-    PARSE_SUCCESS
-};
-
-struct adjslot_list {
-    struct adjslot_list *next;
-    struct adjslot_list *prev;
-};
-
-struct proc {
-    struct adjslot_list asl;
-    int pid;
-    uid_t uid;
-    int oomadj;
-    struct proc *pidhash_next;
-};
-
-struct reread_data {
-    const char* const filename;
-    int fd;
-};
-
-#ifdef LMKD_LOG_STATS
-static bool enable_stats_log;
-static android_log_context log_ctx;
-#endif
-
-#define PIDHASH_SZ 1024
-static struct proc *pidhash[PIDHASH_SZ];
-#define pid_hashfn(x) ((((x) >> 8) ^ (x)) & (PIDHASH_SZ - 1))
-
-#define ADJTOSLOT(adj) ((adj) + -OOM_SCORE_ADJ_MIN)
-#define ADJTOSLOT_COUNT (ADJTOSLOT(OOM_SCORE_ADJ_MAX) + 1)
-static struct adjslot_list procadjslot_list[ADJTOSLOT_COUNT];
-
-#define MAX_DISTINCT_OOM_ADJ 32
-#define KILLCNT_INVALID_IDX 0xFF
-/*
- * Because killcnt array is sparse a two-level indirection is used
- * to keep the size small. killcnt_idx stores index of the element in
- * killcnt array. Index KILLCNT_INVALID_IDX indicates an unused slot.
- */
-static uint8_t killcnt_idx[ADJTOSLOT_COUNT];
-static uint16_t killcnt[MAX_DISTINCT_OOM_ADJ];
-static int killcnt_free_idx = 0;
-static uint32_t killcnt_total = 0;
-
-/* PAGE_SIZE / 1024 */
-static long page_k;
-
-static bool parse_int64(const char* str, int64_t* ret) {
-    char* endptr;
-    long long val = strtoll(str, &endptr, 10);
-    if (str == endptr || val > INT64_MAX) {
-        return false;
-    }
-    *ret = (int64_t)val;
-    return true;
-}
-
-static enum field_match_result match_field(const char* cp, const char* ap,
-                                   const char* const field_names[],
-                                   int field_count, int64_t* field,
-                                   int *field_idx) {
-    int64_t val;
-    int i;
-
-    for (i = 0; i < field_count; i++) {
-        if (!strcmp(cp, field_names[i])) {
-            *field_idx = i;
-            return parse_int64(ap, field) ? PARSE_SUCCESS : PARSE_FAIL;
-        }
-    }
-    return NO_MATCH;
-}
-
-/*
- * Read file content from the beginning up to max_len bytes or EOF
- * whichever happens first.
- */
-static ssize_t read_all(int fd, char *buf, size_t max_len)
-{
-    ssize_t ret = 0;
-    off_t offset = 0;
-
-    while (max_len > 0) {
-        ssize_t r = TEMP_FAILURE_RETRY(pread(fd, buf, max_len, offset));
-        if (r == 0) {
-            break;
-        }
-        if (r == -1) {
-            return -1;
-        }
-        ret += r;
-        buf += r;
-        offset += r;
-        max_len -= r;
-    }
-
-    return ret;
-}
-
-/*
- * Read a new or already opened file from the beginning.
- * If the file has not been opened yet data->fd should be set to -1.
- * To be used with files which are read often and possibly during high
- * memory pressure to minimize file opening which by itself requires kernel
- * memory allocation and might result in a stall on memory stressed system.
- */
-static int reread_file(struct reread_data *data, char *buf, size_t buf_size) {
-    ssize_t size;
-
-    if (data->fd == -1) {
-        data->fd = open(data->filename, O_RDONLY | O_CLOEXEC);
-        if (data->fd == -1) {
-            ALOGE("%s open: %s", data->filename, strerror(errno));
-            return -1;
-        }
-    }
-
-    size = read_all(data->fd, buf, buf_size - 1);
-    if (size < 0) {
-        ALOGE("%s read: %s", data->filename, strerror(errno));
-        close(data->fd);
-        data->fd = -1;
-        return -1;
-    }
-    ALOG_ASSERT((size_t)size < buf_size - 1, "%s too large", data->filename);
-    buf[size] = 0;
-
-    return 0;
-}
-
-static struct proc *pid_lookup(int pid) {
-    struct proc *procp;
-
-    for (procp = pidhash[pid_hashfn(pid)]; procp && procp->pid != pid;
-         procp = procp->pidhash_next)
-            ;
-
-    return procp;
-}
-
-static void adjslot_insert(struct adjslot_list *head, struct adjslot_list *new)
-{
-    struct adjslot_list *next = head->next;
-    new->prev = head;
-    new->next = next;
-    next->prev = new;
-    head->next = new;
-}
-
-static void adjslot_remove(struct adjslot_list *old)
-{
-    struct adjslot_list *prev = old->prev;
-    struct adjslot_list *next = old->next;
-    next->prev = prev;
-    prev->next = next;
-}
-
-static struct adjslot_list *adjslot_tail(struct adjslot_list *head) {
-    struct adjslot_list *asl = head->prev;
-
-    return asl == head ? NULL : asl;
-}
-
-static void proc_slot(struct proc *procp) {
-    int adjslot = ADJTOSLOT(procp->oomadj);
-
-    adjslot_insert(&procadjslot_list[adjslot], &procp->asl);
-}
-
-static void proc_unslot(struct proc *procp) {
-    adjslot_remove(&procp->asl);
-}
-
-static void proc_insert(struct proc *procp) {
-    int hval = pid_hashfn(procp->pid);
-
-    procp->pidhash_next = pidhash[hval];
-    pidhash[hval] = procp;
-    proc_slot(procp);
-}
-
-static int pid_remove(int pid) {
-    int hval = pid_hashfn(pid);
-    struct proc *procp;
-    struct proc *prevp;
-
-    for (procp = pidhash[hval], prevp = NULL; procp && procp->pid != pid;
-         procp = procp->pidhash_next)
-            prevp = procp;
-
-    if (!procp)
-        return -1;
-
-    if (!prevp)
-        pidhash[hval] = procp->pidhash_next;
-    else
-        prevp->pidhash_next = procp->pidhash_next;
-
-    proc_unslot(procp);
-    free(procp);
-    return 0;
-}
-
-/*
- * Write a string to a file.
- * Returns false if the file does not exist.
- */
-static bool writefilestring(const char *path, const char *s,
-                            bool err_if_missing) {
-    int fd = open(path, O_WRONLY | O_CLOEXEC);
-    ssize_t len = strlen(s);
-    ssize_t ret;
-
-    if (fd < 0) {
-        if (err_if_missing) {
-            ALOGE("Error opening %s; errno=%d", path, errno);
-        }
-        return false;
-    }
-
-    ret = TEMP_FAILURE_RETRY(write(fd, s, len));
-    if (ret < 0) {
-        ALOGE("Error writing %s; errno=%d", path, errno);
-    } else if (ret < len) {
-        ALOGE("Short write on %s; length=%zd", path, ret);
-    }
-
-    close(fd);
-    return true;
-}
-
-static inline long get_time_diff_ms(struct timespec *from,
-                                    struct timespec *to) {
-    return (to->tv_sec - from->tv_sec) * (long)MS_PER_SEC +
-           (to->tv_nsec - from->tv_nsec) / (long)NS_PER_MS;
-}
-
-static int proc_get_tgid(int pid) {
-    char path[PATH_MAX];
-    char buf[PAGE_SIZE];
-    int fd;
-    ssize_t size;
-    char *pos;
-    int64_t tgid = -1;
-
-    snprintf(path, PATH_MAX, "/proc/%d/status", pid);
-    fd = open(path, O_RDONLY | O_CLOEXEC);
-    if (fd < 0) {
-        return -1;
-    }
-
-    size = read_all(fd, buf, sizeof(buf) - 1);
-    if (size < 0) {
-        goto out;
-    }
-    buf[size] = 0;
-
-    pos = buf;
-    while (true) {
-        pos = strstr(pos, PROC_STATUS_TGID_FIELD);
-        /* Stop if TGID tag not found or found at the line beginning */
-        if (pos == NULL || pos == buf || pos[-1] == '\n') {
-            break;
-        }
-        pos++;
-    }
-
-    if (pos == NULL) {
-        goto out;
-    }
-
-    pos += strlen(PROC_STATUS_TGID_FIELD);
-    while (*pos == ' ') pos++;
-    parse_int64(pos, &tgid);
-
-out:
-    close(fd);
-    return (int)tgid;
-}
-
-static void cmd_procprio(LMKD_CTRL_PACKET packet) {
-    struct proc *procp;
-    char path[80];
-    char val[20];
-    int soft_limit_mult;
-    struct lmk_procprio params;
-    bool is_system_server;
-    struct passwd *pwdrec;
-    int tgid;
-
-    lmkd_pack_get_procprio(packet, &params);
-
-    if (params.oomadj < OOM_SCORE_ADJ_MIN ||
-        params.oomadj > OOM_SCORE_ADJ_MAX) {
-        ALOGE("Invalid PROCPRIO oomadj argument %d", params.oomadj);
-        return;
-    }
-
-    /* Check if registered process is a thread group leader */
-    tgid = proc_get_tgid(params.pid);
-    if (tgid >= 0 && tgid != params.pid) {
-        ALOGE("Attempt to register a task that is not a thread group leader (tid %d, tgid %d)",
-            params.pid, tgid);
-        return;
-    }
-
-    /* gid containing AID_READPROC required */
-    /* CAP_SYS_RESOURCE required */
-    /* CAP_DAC_OVERRIDE required */
-    snprintf(path, sizeof(path), "/proc/%d/oom_score_adj", params.pid);
-    snprintf(val, sizeof(val), "%d", params.oomadj);
-    if (!writefilestring(path, val, false)) {
-        ALOGW("Failed to open %s; errno=%d: process %d might have been killed",
-              path, errno, params.pid);
-        /* If this file does not exist the process is dead. */
-        return;
-    }
-
-    if (use_inkernel_interface) {
-        return;
-    }
-
-    if (per_app_memcg) {
-        if (params.oomadj >= 900) {
-            soft_limit_mult = 0;
-        } else if (params.oomadj >= 800) {
-            soft_limit_mult = 0;
-        } else if (params.oomadj >= 700) {
-            soft_limit_mult = 0;
-        } else if (params.oomadj >= 600) {
-            // Launcher should be perceptible, don't kill it.
-            params.oomadj = 200;
-            soft_limit_mult = 1;
-        } else if (params.oomadj >= 500) {
-            soft_limit_mult = 0;
-        } else if (params.oomadj >= 400) {
-            soft_limit_mult = 0;
-        } else if (params.oomadj >= 300) {
-            soft_limit_mult = 1;
-        } else if (params.oomadj >= 200) {
-            soft_limit_mult = 8;
-        } else if (params.oomadj >= 100) {
-            soft_limit_mult = 10;
-        } else if (params.oomadj >=   0) {
-            soft_limit_mult = 20;
-        } else {
-            // Persistent processes will have a large
-            // soft limit 512MB.
-            soft_limit_mult = 64;
-        }
-
-        snprintf(path, sizeof(path), MEMCG_SYSFS_PATH
-                 "apps/uid_%d/pid_%d/memory.soft_limit_in_bytes",
-                 params.uid, params.pid);
-        snprintf(val, sizeof(val), "%d", soft_limit_mult * EIGHT_MEGA);
-
-        /*
-         * system_server process has no memcg under /dev/memcg/apps but should be
-         * registered with lmkd. This is the best way so far to identify it.
-         */
-        is_system_server = (params.oomadj == SYSTEM_ADJ &&
-                            (pwdrec = getpwnam("system")) != NULL &&
-                            params.uid == pwdrec->pw_uid);
-        writefilestring(path, val, !is_system_server);
-    }
-
-    procp = pid_lookup(params.pid);
-    if (!procp) {
-            procp = malloc(sizeof(struct proc));
-            if (!procp) {
-                // Oh, the irony.  May need to rebuild our state.
-                return;
-            }
-
-            procp->pid = params.pid;
-            procp->uid = params.uid;
-            procp->oomadj = params.oomadj;
-            proc_insert(procp);
-    } else {
-        proc_unslot(procp);
-        procp->oomadj = params.oomadj;
-        proc_slot(procp);
-    }
-}
-
-static void cmd_procremove(LMKD_CTRL_PACKET packet) {
-    struct lmk_procremove params;
-
-    if (use_inkernel_interface) {
-        return;
-    }
-
-    lmkd_pack_get_procremove(packet, &params);
-    /*
-     * WARNING: After pid_remove() procp is freed and can't be used!
-     * Therefore placed at the end of the function.
-     */
-    pid_remove(params.pid);
-}
-
-static void cmd_procpurge() {
-    int i;
-    struct proc *procp;
-    struct proc *next;
-
-    if (use_inkernel_interface) {
-        return;
-    }
-
-    for (i = 0; i <= ADJTOSLOT(OOM_SCORE_ADJ_MAX); i++) {
-        procadjslot_list[i].next = &procadjslot_list[i];
-        procadjslot_list[i].prev = &procadjslot_list[i];
-    }
-
-    for (i = 0; i < PIDHASH_SZ; i++) {
-        procp = pidhash[i];
-        while (procp) {
-            next = procp->pidhash_next;
-            free(procp);
-            procp = next;
-        }
-    }
-    memset(&pidhash[0], 0, sizeof(pidhash));
-}
-
-static void inc_killcnt(int oomadj) {
-    int slot = ADJTOSLOT(oomadj);
-    uint8_t idx = killcnt_idx[slot];
-
-    if (idx == KILLCNT_INVALID_IDX) {
-        /* index is not assigned for this oomadj */
-        if (killcnt_free_idx < MAX_DISTINCT_OOM_ADJ) {
-            killcnt_idx[slot] = killcnt_free_idx;
-            killcnt[killcnt_free_idx] = 1;
-            killcnt_free_idx++;
-        } else {
-            ALOGW("Number of distinct oomadj levels exceeds %d",
-                MAX_DISTINCT_OOM_ADJ);
-        }
-    } else {
-        /*
-         * wraparound is highly unlikely and is detectable using total
-         * counter because it has to be equal to the sum of all counters
-         */
-        killcnt[idx]++;
-    }
-    /* increment total kill counter */
-    killcnt_total++;
-}
-
-static int get_killcnt(int min_oomadj, int max_oomadj) {
-    int slot;
-    int count = 0;
-
-    if (min_oomadj > max_oomadj)
-        return 0;
-
-    /* special case to get total kill count */
-    if (min_oomadj > OOM_SCORE_ADJ_MAX)
-        return killcnt_total;
-
-    while (min_oomadj <= max_oomadj &&
-           (slot = ADJTOSLOT(min_oomadj)) < ADJTOSLOT_COUNT) {
-        uint8_t idx = killcnt_idx[slot];
-        if (idx != KILLCNT_INVALID_IDX) {
-            count += killcnt[idx];
-        }
-        min_oomadj++;
-    }
-
-    return count;
-}
-
-static int cmd_getkillcnt(LMKD_CTRL_PACKET packet) {
-    struct lmk_getkillcnt params;
-
-    if (use_inkernel_interface) {
-        /* kernel driver does not expose this information */
-        return 0;
-    }
-
-    lmkd_pack_get_getkillcnt(packet, &params);
-
-    return get_killcnt(params.min_oomadj, params.max_oomadj);
-}
-
-static void cmd_target(int ntargets, LMKD_CTRL_PACKET packet) {
-    int i;
-    struct lmk_target target;
-    char minfree_str[PROPERTY_VALUE_MAX];
-    char *pstr = minfree_str;
-    char *pend = minfree_str + sizeof(minfree_str);
-    static struct timespec last_req_tm;
-    struct timespec curr_tm;
-
-    if (ntargets < 1 || ntargets > (int)ARRAY_SIZE(lowmem_adj))
-        return;
-
-    /*
-     * Ratelimit minfree updates to once per TARGET_UPDATE_MIN_INTERVAL_MS
-     * to prevent DoS attacks
-     */
-    if (clock_gettime(CLOCK_MONOTONIC_COARSE, &curr_tm) != 0) {
-        ALOGE("Failed to get current time");
-        return;
-    }
-
-    if (get_time_diff_ms(&last_req_tm, &curr_tm) <
-        TARGET_UPDATE_MIN_INTERVAL_MS) {
-        ALOGE("Ignoring frequent updated to lmkd limits");
-        return;
-    }
-
-    last_req_tm = curr_tm;
-
-    for (i = 0; i < ntargets; i++) {
-        lmkd_pack_get_target(packet, i, &target);
-        lowmem_minfree[i] = target.minfree;
-        lowmem_adj[i] = target.oom_adj_score;
-
-        pstr += snprintf(pstr, pend - pstr, "%d:%d,", target.minfree,
-            target.oom_adj_score);
-        if (pstr >= pend) {
-            /* if no more space in the buffer then terminate the loop */
-            pstr = pend;
-            break;
-        }
-    }
-
-    lowmem_targets_size = ntargets;
-
-    /* Override the last extra comma */
-    pstr[-1] = '\0';
-    property_set("sys.lmk.minfree_levels", minfree_str);
-
-    if (has_inkernel_module) {
-        char minfreestr[128];
-        char killpriostr[128];
-
-        minfreestr[0] = '\0';
-        killpriostr[0] = '\0';
-
-        for (i = 0; i < lowmem_targets_size; i++) {
-            char val[40];
-
-            if (i) {
-                strlcat(minfreestr, ",", sizeof(minfreestr));
-                strlcat(killpriostr, ",", sizeof(killpriostr));
-            }
-
-            snprintf(val, sizeof(val), "%d", use_inkernel_interface ? lowmem_minfree[i] : 0);
-            strlcat(minfreestr, val, sizeof(minfreestr));
-            snprintf(val, sizeof(val), "%d", use_inkernel_interface ? lowmem_adj[i] : 0);
-            strlcat(killpriostr, val, sizeof(killpriostr));
-        }
-
-        writefilestring(INKERNEL_MINFREE_PATH, minfreestr, true);
-        writefilestring(INKERNEL_ADJ_PATH, killpriostr, true);
-    }
-}
-
-static void ctrl_data_close(int dsock_idx) {
-    struct epoll_event epev;
-
-    ALOGI("closing lmkd data connection");
-    if (epoll_ctl(epollfd, EPOLL_CTL_DEL, data_sock[dsock_idx].sock, &epev) == -1) {
-        // Log a warning and keep going
-        ALOGW("epoll_ctl for data connection socket failed; errno=%d", errno);
-    }
-    maxevents--;
-
-    close(data_sock[dsock_idx].sock);
-    data_sock[dsock_idx].sock = -1;
-}
-
-static int ctrl_data_read(int dsock_idx, char *buf, size_t bufsz) {
-    int ret = 0;
-
-    ret = TEMP_FAILURE_RETRY(read(data_sock[dsock_idx].sock, buf, bufsz));
-
-    if (ret == -1) {
-        ALOGE("control data socket read failed; errno=%d", errno);
-    } else if (ret == 0) {
-        ALOGE("Got EOF on control data socket");
-        ret = -1;
-    }
-
-    return ret;
-}
-
-static int ctrl_data_write(int dsock_idx, char *buf, size_t bufsz) {
-    int ret = 0;
-
-    ret = TEMP_FAILURE_RETRY(write(data_sock[dsock_idx].sock, buf, bufsz));
-
-    if (ret == -1) {
-        ALOGE("control data socket write failed; errno=%d", errno);
-    } else if (ret == 0) {
-        ALOGE("Got EOF on control data socket");
-        ret = -1;
-    }
-
-    return ret;
-}
-
-static void ctrl_command_handler(int dsock_idx) {
-    LMKD_CTRL_PACKET packet;
-    int len;
-    enum lmk_cmd cmd;
-    int nargs;
-    int targets;
-    int kill_cnt;
-
-    len = ctrl_data_read(dsock_idx, (char *)packet, CTRL_PACKET_MAX_SIZE);
-    if (len <= 0)
-        return;
-
-    if (len < (int)sizeof(int)) {
-        ALOGE("Wrong control socket read length len=%d", len);
-        return;
-    }
-
-    cmd = lmkd_pack_get_cmd(packet);
-    nargs = len / sizeof(int) - 1;
-    if (nargs < 0)
-        goto wronglen;
-
-    switch(cmd) {
-    case LMK_TARGET:
-        targets = nargs / 2;
-        if (nargs & 0x1 || targets > (int)ARRAY_SIZE(lowmem_adj))
-            goto wronglen;
-        cmd_target(targets, packet);
-        break;
-    case LMK_PROCPRIO:
-        if (nargs != 3)
-            goto wronglen;
-        cmd_procprio(packet);
-        break;
-    case LMK_PROCREMOVE:
-        if (nargs != 1)
-            goto wronglen;
-        cmd_procremove(packet);
-        break;
-    case LMK_PROCPURGE:
-        if (nargs != 0)
-            goto wronglen;
-        cmd_procpurge();
-        break;
-    case LMK_GETKILLCNT:
-        if (nargs != 2)
-            goto wronglen;
-        kill_cnt = cmd_getkillcnt(packet);
-        len = lmkd_pack_set_getkillcnt_repl(packet, kill_cnt);
-        if (ctrl_data_write(dsock_idx, (char *)packet, len) != len)
-            return;
-        break;
-    default:
-        ALOGE("Received unknown command code %d", cmd);
-        return;
-    }
-
-    return;
-
-wronglen:
-    ALOGE("Wrong control socket read length cmd=%d len=%d", cmd, len);
-}
-
-static void ctrl_data_handler(int data, uint32_t events) {
-    if (events & EPOLLIN) {
-        ctrl_command_handler(data);
-    }
-}
-
-static int get_free_dsock() {
-    for (int i = 0; i < MAX_DATA_CONN; i++) {
-        if (data_sock[i].sock < 0) {
-            return i;
-        }
-    }
-    return -1;
-}
-
-static void ctrl_connect_handler(int data __unused, uint32_t events __unused) {
-    struct epoll_event epev;
-    int free_dscock_idx = get_free_dsock();
-
-    if (free_dscock_idx < 0) {
-        /*
-         * Number of data connections exceeded max supported. This should not
-         * happen but if it does we drop all existing connections and accept
-         * the new one. This prevents inactive connections from monopolizing
-         * data socket and if we drop ActivityManager connection it will
-         * immediately reconnect.
-         */
-        for (int i = 0; i < MAX_DATA_CONN; i++) {
-            ctrl_data_close(i);
-        }
-        free_dscock_idx = 0;
-    }
-
-    data_sock[free_dscock_idx].sock = accept(ctrl_sock.sock, NULL, NULL);
-    if (data_sock[free_dscock_idx].sock < 0) {
-        ALOGE("lmkd control socket accept failed; errno=%d", errno);
-        return;
-    }
-
-    ALOGI("lmkd data connection established");
-    /* use data to store data connection idx */
-    data_sock[free_dscock_idx].handler_info.data = free_dscock_idx;
-    data_sock[free_dscock_idx].handler_info.handler = ctrl_data_handler;
-    epev.events = EPOLLIN;
-    epev.data.ptr = (void *)&(data_sock[free_dscock_idx].handler_info);
-    if (epoll_ctl(epollfd, EPOLL_CTL_ADD, data_sock[free_dscock_idx].sock, &epev) == -1) {
-        ALOGE("epoll_ctl for data connection socket failed; errno=%d", errno);
-        ctrl_data_close(free_dscock_idx);
-        return;
-    }
-    maxevents++;
-}
-
-#ifdef LMKD_LOG_STATS
-static void memory_stat_parse_line(char* line, struct memory_stat* mem_st) {
-    char key[LINE_MAX + 1];
-    int64_t value;
-
-    sscanf(line, "%" STRINGIFY(LINE_MAX) "s  %" SCNd64 "", key, &value);
-
-    if (strcmp(key, "total_") < 0) {
-        return;
-    }
-
-    if (!strcmp(key, "total_pgfault"))
-        mem_st->pgfault = value;
-    else if (!strcmp(key, "total_pgmajfault"))
-        mem_st->pgmajfault = value;
-    else if (!strcmp(key, "total_rss"))
-        mem_st->rss_in_bytes = value;
-    else if (!strcmp(key, "total_cache"))
-        mem_st->cache_in_bytes = value;
-    else if (!strcmp(key, "total_swap"))
-        mem_st->swap_in_bytes = value;
-}
-
-static int memory_stat_from_cgroup(struct memory_stat* mem_st, int pid, uid_t uid) {
-    FILE *fp;
-    char buf[PATH_MAX];
-
-    snprintf(buf, sizeof(buf), MEMCG_PROCESS_MEMORY_STAT_PATH, uid, pid);
-
-    fp = fopen(buf, "r");
-
-    if (fp == NULL) {
-        ALOGE("%s open failed: %s", buf, strerror(errno));
-        return -1;
-    }
-
-    while (fgets(buf, PAGE_SIZE, fp) != NULL) {
-        memory_stat_parse_line(buf, mem_st);
-    }
-    fclose(fp);
-
-    return 0;
-}
-
-static int memory_stat_from_procfs(struct memory_stat* mem_st, int pid) {
-    char path[PATH_MAX];
-    char buffer[PROC_STAT_BUFFER_SIZE];
-    int fd, ret;
-
-    snprintf(path, sizeof(path), PROC_STAT_FILE_PATH, pid);
-    if ((fd = open(path, O_RDONLY | O_CLOEXEC)) < 0) {
-        ALOGE("%s open failed: %s", path, strerror(errno));
-        return -1;
-    }
-
-    ret = read(fd, buffer, sizeof(buffer));
-    if (ret < 0) {
-        ALOGE("%s read failed: %s", path, strerror(errno));
-        close(fd);
-        return -1;
-    }
-    close(fd);
-
-    // field 10 is pgfault
-    // field 12 is pgmajfault
-    // field 22 is starttime
-    // field 24 is rss_in_pages
-    int64_t pgfault = 0, pgmajfault = 0, starttime = 0, rss_in_pages = 0;
-    if (sscanf(buffer,
-               "%*u %*s %*s %*d %*d %*d %*d %*d %*d %" SCNd64 " %*d "
-               "%" SCNd64 " %*d %*u %*u %*d %*d %*d %*d %*d %*d "
-               "%" SCNd64 " %*d %" SCNd64 "",
-               &pgfault, &pgmajfault, &starttime, &rss_in_pages) != 4) {
-        return -1;
-    }
-    mem_st->pgfault = pgfault;
-    mem_st->pgmajfault = pgmajfault;
-    mem_st->rss_in_bytes = (rss_in_pages * PAGE_SIZE);
-    mem_st->process_start_time_ns = starttime * (NS_PER_SEC / sysconf(_SC_CLK_TCK));
-    return 0;
-}
-#endif
-
-/* /prop/zoneinfo parsing routines */
-static int64_t zoneinfo_parse_protection(char *cp) {
-    int64_t max = 0;
-    long long zoneval;
-    char *save_ptr;
-
-    for (cp = strtok_r(cp, "(), ", &save_ptr); cp;
-         cp = strtok_r(NULL, "), ", &save_ptr)) {
-        zoneval = strtoll(cp, &cp, 0);
-        if (zoneval > max) {
-            max = (zoneval > INT64_MAX) ? INT64_MAX : zoneval;
-        }
-    }
-
-    return max;
-}
-
-static bool zoneinfo_parse_line(char *line, union zoneinfo *zi) {
-    char *cp = line;
-    char *ap;
-    char *save_ptr;
-    int64_t val;
-    int field_idx;
-
-    cp = strtok_r(line, " ", &save_ptr);
-    if (!cp) {
-        return true;
-    }
-
-    if (!strcmp(cp, "protection:")) {
-        ap = strtok_r(NULL, ")", &save_ptr);
-    } else {
-        ap = strtok_r(NULL, " ", &save_ptr);
-    }
-
-    if (!ap) {
-        return true;
-    }
-
-    switch (match_field(cp, ap, zoneinfo_field_names,
-                        ZI_FIELD_COUNT, &val, &field_idx)) {
-    case (PARSE_SUCCESS):
-        zi->arr[field_idx] += val;
-        break;
-    case (NO_MATCH):
-        if (!strcmp(cp, "protection:")) {
-            zi->field.totalreserve_pages +=
-                zoneinfo_parse_protection(ap);
-        }
-        break;
-    case (PARSE_FAIL):
-    default:
-        return false;
-    }
-    return true;
-}
-
-static int zoneinfo_parse(union zoneinfo *zi) {
-    static struct reread_data file_data = {
-        .filename = ZONEINFO_PATH,
-        .fd = -1,
-    };
-    char buf[PAGE_SIZE];
-    char *save_ptr;
-    char *line;
-
-    memset(zi, 0, sizeof(union zoneinfo));
-
-    if (reread_file(&file_data, buf, sizeof(buf)) < 0) {
-        return -1;
-    }
-
-    for (line = strtok_r(buf, "\n", &save_ptr); line;
-         line = strtok_r(NULL, "\n", &save_ptr)) {
-        if (!zoneinfo_parse_line(line, zi)) {
-            ALOGE("%s parse error", file_data.filename);
-            return -1;
-        }
-    }
-    zi->field.totalreserve_pages += zi->field.high;
-
-    return 0;
-}
-
-/* /prop/meminfo parsing routines */
-static bool meminfo_parse_line(char *line, union meminfo *mi) {
-    char *cp = line;
-    char *ap;
-    char *save_ptr;
-    int64_t val;
-    int field_idx;
-    enum field_match_result match_res;
-
-    cp = strtok_r(line, " ", &save_ptr);
-    if (!cp) {
-        return false;
-    }
-
-    ap = strtok_r(NULL, " ", &save_ptr);
-    if (!ap) {
-        return false;
-    }
-
-    match_res = match_field(cp, ap, meminfo_field_names, MI_FIELD_COUNT,
-        &val, &field_idx);
-    if (match_res == PARSE_SUCCESS) {
-        mi->arr[field_idx] = val / page_k;
-    }
-    return (match_res != PARSE_FAIL);
-}
-
-static int meminfo_parse(union meminfo *mi) {
-    static struct reread_data file_data = {
-        .filename = MEMINFO_PATH,
-        .fd = -1,
-    };
-    char buf[PAGE_SIZE];
-    char *save_ptr;
-    char *line;
-
-    memset(mi, 0, sizeof(union meminfo));
-
-    if (reread_file(&file_data, buf, sizeof(buf)) < 0) {
-        return -1;
-    }
-
-    for (line = strtok_r(buf, "\n", &save_ptr); line;
-         line = strtok_r(NULL, "\n", &save_ptr)) {
-        if (!meminfo_parse_line(line, mi)) {
-            ALOGE("%s parse error", file_data.filename);
-            return -1;
-        }
-    }
-    mi->field.nr_file_pages = mi->field.cached + mi->field.swap_cached +
-        mi->field.buffers;
-
-    return 0;
-}
-
-static void meminfo_log(union meminfo *mi) {
-    for (int field_idx = 0; field_idx < MI_FIELD_COUNT; field_idx++) {
-        android_log_write_int32(ctx, (int32_t)min(mi->arr[field_idx] * page_k, INT32_MAX));
-    }
-
-    android_log_write_list(ctx, LOG_ID_EVENTS);
-    android_log_reset(ctx);
-}
-
-static int proc_get_size(int pid) {
-    char path[PATH_MAX];
-    char line[LINE_MAX];
-    int fd;
-    int rss = 0;
-    int total;
-    ssize_t ret;
-
-    /* gid containing AID_READPROC required */
-    snprintf(path, PATH_MAX, "/proc/%d/statm", pid);
-    fd = open(path, O_RDONLY | O_CLOEXEC);
-    if (fd == -1)
-        return -1;
-
-    ret = read_all(fd, line, sizeof(line) - 1);
-    if (ret < 0) {
-        close(fd);
-        return -1;
-    }
-
-    sscanf(line, "%d %d ", &total, &rss);
-    close(fd);
-    return rss;
-}
-
-static char *proc_get_name(int pid) {
-    char path[PATH_MAX];
-    static char line[LINE_MAX];
-    int fd;
-    char *cp;
-    ssize_t ret;
-
-    /* gid containing AID_READPROC required */
-    snprintf(path, PATH_MAX, "/proc/%d/cmdline", pid);
-    fd = open(path, O_RDONLY | O_CLOEXEC);
-    if (fd == -1)
-        return NULL;
-    ret = read_all(fd, line, sizeof(line) - 1);
-    close(fd);
-    if (ret < 0) {
-        return NULL;
-    }
-
-    cp = strchr(line, ' ');
-    if (cp)
-        *cp = '\0';
-
-    return line;
-}
-
-static struct proc *proc_adj_lru(int oomadj) {
-    return (struct proc *)adjslot_tail(&procadjslot_list[ADJTOSLOT(oomadj)]);
-}
-
-static struct proc *proc_get_heaviest(int oomadj) {
-    struct adjslot_list *head = &procadjslot_list[ADJTOSLOT(oomadj)];
-    struct adjslot_list *curr = head->next;
-    struct proc *maxprocp = NULL;
-    int maxsize = 0;
-    while (curr != head) {
-        int pid = ((struct proc *)curr)->pid;
-        int tasksize = proc_get_size(pid);
-        if (tasksize <= 0) {
-            struct adjslot_list *next = curr->next;
-            pid_remove(pid);
-            curr = next;
-        } else {
-            if (tasksize > maxsize) {
-                maxsize = tasksize;
-                maxprocp = (struct proc *)curr;
-            }
-            curr = curr->next;
-        }
-    }
-    return maxprocp;
-}
-
-static void set_process_group_and_prio(int pid, SchedPolicy sp, int prio) {
-    DIR* d;
-    char proc_path[PATH_MAX];
-    struct dirent* de;
-
-    snprintf(proc_path, sizeof(proc_path), "/proc/%d/task", pid);
-    if (!(d = opendir(proc_path))) {
-        ALOGW("Failed to open %s; errno=%d: process pid(%d) might have died", proc_path, errno,
-              pid);
-        return;
-    }
-
-    while ((de = readdir(d))) {
-        int t_pid;
-
-        if (de->d_name[0] == '.') continue;
-        t_pid = atoi(de->d_name);
-
-        if (!t_pid) {
-            ALOGW("Failed to get t_pid for '%s' of pid(%d)", de->d_name, pid);
-            continue;
-        }
-
-        if (setpriority(PRIO_PROCESS, t_pid, prio) && errno != ESRCH) {
-            ALOGW("Unable to raise priority of killing t_pid (%d): errno=%d", t_pid, errno);
-        }
-
-        if (set_cpuset_policy(t_pid, sp)) {
-            ALOGW("Failed to set_cpuset_policy on pid(%d) t_pid(%d) to %d", pid, t_pid, (int)sp);
-            continue;
-        }
-    }
-    closedir(d);
-}
-
-static int last_killed_pid = -1;
-
-/* Kill one process specified by procp.  Returns the size of the process killed */
-static int kill_one_process(struct proc* procp, int min_oom_score) {
-    int pid = procp->pid;
-    uid_t uid = procp->uid;
-    int tgid;
-    char *taskname;
-    int tasksize;
-    int r;
-    int result = -1;
-
-#ifdef LMKD_LOG_STATS
-    struct memory_stat mem_st = {};
-    int memory_stat_parse_result = -1;
-#else
-    /* To prevent unused parameter warning */
-    (void)(min_oom_score);
-#endif
-
-    tgid = proc_get_tgid(pid);
-    if (tgid >= 0 && tgid != pid) {
-        ALOGE("Possible pid reuse detected (pid %d, tgid %d)!", pid, tgid);
-        goto out;
-    }
-
-    taskname = proc_get_name(pid);
-    if (!taskname) {
-        goto out;
-    }
-
-    tasksize = proc_get_size(pid);
-    if (tasksize <= 0) {
-        goto out;
-    }
-
-#ifdef LMKD_LOG_STATS
-    if (enable_stats_log) {
-        if (per_app_memcg) {
-            memory_stat_parse_result = memory_stat_from_cgroup(&mem_st, pid, uid);
-        } else {
-            memory_stat_parse_result = memory_stat_from_procfs(&mem_st, pid);
-        }
-    }
-#endif
-
-    TRACE_KILL_START(pid);
-
-    /* CAP_KILL required */
-    r = kill(pid, SIGKILL);
-
-    set_process_group_and_prio(pid, SP_FOREGROUND, ANDROID_PRIORITY_HIGHEST);
-
-    inc_killcnt(procp->oomadj);
-    ALOGI("Kill '%s' (%d), uid %d, oom_adj %d to free %ldkB",
-        taskname, pid, uid, procp->oomadj, tasksize * page_k);
-
-    TRACE_KILL_END();
-
-    last_killed_pid = pid;
-
-    if (r) {
-        ALOGE("kill(%d): errno=%d", pid, errno);
-        goto out;
-    } else {
-#ifdef LMKD_LOG_STATS
-        if (memory_stat_parse_result == 0) {
-            stats_write_lmk_kill_occurred(log_ctx, LMK_KILL_OCCURRED, uid, taskname,
-                    procp->oomadj, mem_st.pgfault, mem_st.pgmajfault, mem_st.rss_in_bytes,
-                    mem_st.cache_in_bytes, mem_st.swap_in_bytes, mem_st.process_start_time_ns,
-                    min_oom_score);
-        } else if (enable_stats_log) {
-            stats_write_lmk_kill_occurred(log_ctx, LMK_KILL_OCCURRED, uid, taskname, procp->oomadj,
-                                          -1, -1, tasksize * BYTES_IN_KILOBYTE, -1, -1, -1,
-                                          min_oom_score);
-        }
-#endif
-        result = tasksize;
-    }
-
-out:
-    /*
-     * WARNING: After pid_remove() procp is freed and can't be used!
-     * Therefore placed at the end of the function.
-     */
-    pid_remove(pid);
-    return result;
-}
-
-/*
- * Find one process to kill at or above the given oom_adj level.
- * Returns size of the killed process.
- */
-static int find_and_kill_process(int min_score_adj) {
-    int i;
-    int killed_size = 0;
-
-#ifdef LMKD_LOG_STATS
-    bool lmk_state_change_start = false;
-#endif
-
-    for (i = OOM_SCORE_ADJ_MAX; i >= min_score_adj; i--) {
-        struct proc *procp;
-
-        while (true) {
-            procp = kill_heaviest_task ?
-                proc_get_heaviest(i) : proc_adj_lru(i);
-
-            if (!procp)
-                break;
-
-            killed_size = kill_one_process(procp, min_score_adj);
-            if (killed_size >= 0) {
-#ifdef LMKD_LOG_STATS
-                if (enable_stats_log && !lmk_state_change_start) {
-                    lmk_state_change_start = true;
-                    stats_write_lmk_state_changed(log_ctx, LMK_STATE_CHANGED,
-                                                  LMK_STATE_CHANGE_START);
-                }
-#endif
-                break;
-            }
-        }
-        if (killed_size) {
-            break;
-        }
-    }
-
-#ifdef LMKD_LOG_STATS
-    if (enable_stats_log && lmk_state_change_start) {
-        stats_write_lmk_state_changed(log_ctx, LMK_STATE_CHANGED, LMK_STATE_CHANGE_STOP);
-    }
-#endif
-
-    return killed_size;
-}
-
-static int64_t get_memory_usage(struct reread_data *file_data) {
-    int ret;
-    int64_t mem_usage;
-    char buf[32];
-
-    if (reread_file(file_data, buf, sizeof(buf)) < 0) {
-        return -1;
-    }
-
-    if (!parse_int64(buf, &mem_usage)) {
-        ALOGE("%s parse error", file_data->filename);
-        return -1;
-    }
-    if (mem_usage == 0) {
-        ALOGE("No memory!");
-        return -1;
-    }
-    return mem_usage;
-}
-
-void record_low_pressure_levels(union meminfo *mi) {
-    if (low_pressure_mem.min_nr_free_pages == -1 ||
-        low_pressure_mem.min_nr_free_pages > mi->field.nr_free_pages) {
-        if (debug_process_killing) {
-            ALOGI("Low pressure min memory update from %" PRId64 " to %" PRId64,
-                low_pressure_mem.min_nr_free_pages, mi->field.nr_free_pages);
-        }
-        low_pressure_mem.min_nr_free_pages = mi->field.nr_free_pages;
-    }
-    /*
-     * Free memory at low vmpressure events occasionally gets spikes,
-     * possibly a stale low vmpressure event with memory already
-     * freed up (no memory pressure should have been reported).
-     * Ignore large jumps in max_nr_free_pages that would mess up our stats.
-     */
-    if (low_pressure_mem.max_nr_free_pages == -1 ||
-        (low_pressure_mem.max_nr_free_pages < mi->field.nr_free_pages &&
-         mi->field.nr_free_pages - low_pressure_mem.max_nr_free_pages <
-         low_pressure_mem.max_nr_free_pages * 0.1)) {
-        if (debug_process_killing) {
-            ALOGI("Low pressure max memory update from %" PRId64 " to %" PRId64,
-                low_pressure_mem.max_nr_free_pages, mi->field.nr_free_pages);
-        }
-        low_pressure_mem.max_nr_free_pages = mi->field.nr_free_pages;
-    }
-}
-
-enum vmpressure_level upgrade_level(enum vmpressure_level level) {
-    return (enum vmpressure_level)((level < VMPRESS_LEVEL_CRITICAL) ?
-        level + 1 : level);
-}
-
-enum vmpressure_level downgrade_level(enum vmpressure_level level) {
-    return (enum vmpressure_level)((level > VMPRESS_LEVEL_LOW) ?
-        level - 1 : level);
-}
-
-static bool is_kill_pending(void) {
-    char buf[24];
-
-    if (last_killed_pid < 0) {
-        return false;
-    }
-
-    snprintf(buf, sizeof(buf), "/proc/%d/", last_killed_pid);
-    if (access(buf, F_OK) == 0) {
-        return true;
-    }
-
-    // reset last killed PID because there's nothing pending
-    last_killed_pid = -1;
-    return false;
-}
-
-static void mp_event_common(int data, uint32_t events __unused) {
-    int ret;
-    unsigned long long evcount;
-    int64_t mem_usage, memsw_usage;
-    int64_t mem_pressure;
-    enum vmpressure_level lvl;
-    union meminfo mi;
-    union zoneinfo zi;
-    struct timespec curr_tm;
-    static struct timespec last_kill_tm;
-    static unsigned long kill_skip_count = 0;
-    enum vmpressure_level level = (enum vmpressure_level)data;
-    long other_free = 0, other_file = 0;
-    int min_score_adj;
-    int minfree = 0;
-    static struct reread_data mem_usage_file_data = {
-        .filename = MEMCG_MEMORY_USAGE,
-        .fd = -1,
-    };
-    static struct reread_data memsw_usage_file_data = {
-        .filename = MEMCG_MEMORYSW_USAGE,
-        .fd = -1,
-    };
-
-    if (debug_process_killing) {
-        ALOGI("%s memory pressure event is triggered", level_name[level]);
-    }
-
-    if (!use_psi_monitors) {
-        /*
-         * Check all event counters from low to critical
-         * and upgrade to the highest priority one. By reading
-         * eventfd we also reset the event counters.
-         */
-        for (lvl = VMPRESS_LEVEL_LOW; lvl < VMPRESS_LEVEL_COUNT; lvl++) {
-            if (mpevfd[lvl] != -1 &&
-                TEMP_FAILURE_RETRY(read(mpevfd[lvl],
-                                   &evcount, sizeof(evcount))) > 0 &&
-                evcount > 0 && lvl > level) {
-                level = lvl;
-            }
-        }
-    }
-
-    if (clock_gettime(CLOCK_MONOTONIC_COARSE, &curr_tm) != 0) {
-        ALOGE("Failed to get current time");
-        return;
-    }
-
-    if (kill_timeout_ms) {
-        // If we're within the timeout, see if there's pending reclaim work
-        // from the last killed process. If there is (as evidenced by
-        // /proc/<pid> continuing to exist), skip killing for now.
-        if ((get_time_diff_ms(&last_kill_tm, &curr_tm) < kill_timeout_ms) &&
-            (low_ram_device || is_kill_pending())) {
-            kill_skip_count++;
-            return;
-        }
-    }
-
-    if (kill_skip_count > 0) {
-        ALOGI("%lu memory pressure events were skipped after a kill!",
-              kill_skip_count);
-        kill_skip_count = 0;
-    }
-
-    if (meminfo_parse(&mi) < 0 || zoneinfo_parse(&zi) < 0) {
-        ALOGE("Failed to get free memory!");
-        return;
-    }
-
-    if (use_minfree_levels) {
-        int i;
-
-        other_free = mi.field.nr_free_pages - zi.field.totalreserve_pages;
-        if (mi.field.nr_file_pages > (mi.field.shmem + mi.field.unevictable + mi.field.swap_cached)) {
-            other_file = (mi.field.nr_file_pages - mi.field.shmem -
-                          mi.field.unevictable - mi.field.swap_cached);
-        } else {
-            other_file = 0;
-        }
-
-        min_score_adj = OOM_SCORE_ADJ_MAX + 1;
-        for (i = 0; i < lowmem_targets_size; i++) {
-            minfree = lowmem_minfree[i];
-            if (other_free < minfree && other_file < minfree) {
-                min_score_adj = lowmem_adj[i];
-                break;
-            }
-        }
-
-        if (min_score_adj == OOM_SCORE_ADJ_MAX + 1) {
-            if (debug_process_killing) {
-                ALOGI("Ignore %s memory pressure event "
-                      "(free memory=%ldkB, cache=%ldkB, limit=%ldkB)",
-                      level_name[level], other_free * page_k, other_file * page_k,
-                      (long)lowmem_minfree[lowmem_targets_size - 1] * page_k);
-            }
-            return;
-        }
-
-        goto do_kill;
-    }
-
-    if (level == VMPRESS_LEVEL_LOW) {
-        record_low_pressure_levels(&mi);
-    }
-
-    if (level_oomadj[level] > OOM_SCORE_ADJ_MAX) {
-        /* Do not monitor this pressure level */
-        return;
-    }
-
-    if ((mem_usage = get_memory_usage(&mem_usage_file_data)) < 0) {
-        goto do_kill;
-    }
-    if ((memsw_usage = get_memory_usage(&memsw_usage_file_data)) < 0) {
-        goto do_kill;
-    }
-
-    // Calculate percent for swappinness.
-    mem_pressure = (mem_usage * 100) / memsw_usage;
-
-    if (enable_pressure_upgrade && level != VMPRESS_LEVEL_CRITICAL) {
-        // We are swapping too much.
-        if (mem_pressure < upgrade_pressure) {
-            level = upgrade_level(level);
-            if (debug_process_killing) {
-                ALOGI("Event upgraded to %s", level_name[level]);
-            }
-        }
-    }
-
-    // If we still have enough swap space available, check if we want to
-    // ignore/downgrade pressure events.
-    if (mi.field.free_swap >=
-        mi.field.total_swap * swap_free_low_percentage / 100) {
-        // If the pressure is larger than downgrade_pressure lmk will not
-        // kill any process, since enough memory is available.
-        if (mem_pressure > downgrade_pressure) {
-            if (debug_process_killing) {
-                ALOGI("Ignore %s memory pressure", level_name[level]);
-            }
-            return;
-        } else if (level == VMPRESS_LEVEL_CRITICAL && mem_pressure > upgrade_pressure) {
-            if (debug_process_killing) {
-                ALOGI("Downgrade critical memory pressure");
-            }
-            // Downgrade event, since enough memory available.
-            level = downgrade_level(level);
-        }
-    }
-
-do_kill:
-    if (low_ram_device) {
-        /* For Go devices kill only one task */
-        if (find_and_kill_process(level_oomadj[level]) == 0) {
-            if (debug_process_killing) {
-                ALOGI("Nothing to kill");
-            }
-        } else {
-            meminfo_log(&mi);
-        }
-    } else {
-        int pages_freed;
-        static struct timespec last_report_tm;
-        static unsigned long report_skip_count = 0;
-
-        if (!use_minfree_levels) {
-            /* Free up enough memory to downgrate the memory pressure to low level */
-            if (mi.field.nr_free_pages >= low_pressure_mem.max_nr_free_pages) {
-                if (debug_process_killing) {
-                    ALOGI("Ignoring pressure since more memory is "
-                        "available (%" PRId64 ") than watermark (%" PRId64 ")",
-                        mi.field.nr_free_pages, low_pressure_mem.max_nr_free_pages);
-                }
-                return;
-            }
-            min_score_adj = level_oomadj[level];
-        }
-
-        pages_freed = find_and_kill_process(min_score_adj);
-
-        if (pages_freed == 0) {
-            /* Rate limit kill reports when nothing was reclaimed */
-            if (get_time_diff_ms(&last_report_tm, &curr_tm) < FAIL_REPORT_RLIMIT_MS) {
-                report_skip_count++;
-                return;
-            }
-        } else {
-            /* If we killed anything, update the last killed timestamp. */
-            last_kill_tm = curr_tm;
-        }
-
-        /* Log meminfo whenever we kill or when report rate limit allows */
-        meminfo_log(&mi);
-
-        if (use_minfree_levels) {
-            ALOGI("Reclaimed %ldkB, cache(%ldkB) and "
-                "free(%" PRId64 "kB)-reserved(%" PRId64 "kB) below min(%ldkB) for oom_adj %d",
-                pages_freed * page_k,
-                other_file * page_k, mi.field.nr_free_pages * page_k,
-                zi.field.totalreserve_pages * page_k,
-                minfree * page_k, min_score_adj);
-        } else {
-            ALOGI("Reclaimed %ldkB at oom_adj %d",
-                pages_freed * page_k, min_score_adj);
-        }
-
-        if (report_skip_count > 0) {
-            ALOGI("Suppressed %lu failed kill reports", report_skip_count);
-            report_skip_count = 0;
-        }
-
-        last_report_tm = curr_tm;
-    }
-}
-
-static bool init_mp_psi(enum vmpressure_level level) {
-    int fd = init_psi_monitor(psi_thresholds[level].stall_type,
-        psi_thresholds[level].threshold_ms * US_PER_MS,
-        PSI_WINDOW_SIZE_MS * US_PER_MS);
-
-    if (fd < 0) {
-        return false;
-    }
-
-    vmpressure_hinfo[level].handler = mp_event_common;
-    vmpressure_hinfo[level].data = level;
-    if (register_psi_monitor(epollfd, fd, &vmpressure_hinfo[level]) < 0) {
-        destroy_psi_monitor(fd);
-        return false;
-    }
-    maxevents++;
-    mpevfd[level] = fd;
-
-    return true;
-}
-
-static void destroy_mp_psi(enum vmpressure_level level) {
-    int fd = mpevfd[level];
-
-    if (unregister_psi_monitor(epollfd, fd) < 0) {
-        ALOGE("Failed to unregister psi monitor for %s memory pressure; errno=%d",
-            level_name[level], errno);
-    }
-    destroy_psi_monitor(fd);
-    mpevfd[level] = -1;
-}
-
-static bool init_psi_monitors() {
-    if (!init_mp_psi(VMPRESS_LEVEL_LOW)) {
-        return false;
-    }
-    if (!init_mp_psi(VMPRESS_LEVEL_MEDIUM)) {
-        destroy_mp_psi(VMPRESS_LEVEL_LOW);
-        return false;
-    }
-    if (!init_mp_psi(VMPRESS_LEVEL_CRITICAL)) {
-        destroy_mp_psi(VMPRESS_LEVEL_MEDIUM);
-        destroy_mp_psi(VMPRESS_LEVEL_LOW);
-        return false;
-    }
-    return true;
-}
-
-static bool init_mp_common(enum vmpressure_level level) {
-    int mpfd;
-    int evfd;
-    int evctlfd;
-    char buf[256];
-    struct epoll_event epev;
-    int ret;
-    int level_idx = (int)level;
-    const char *levelstr = level_name[level_idx];
-
-    /* gid containing AID_SYSTEM required */
-    mpfd = open(MEMCG_SYSFS_PATH "memory.pressure_level", O_RDONLY | O_CLOEXEC);
-    if (mpfd < 0) {
-        ALOGI("No kernel memory.pressure_level support (errno=%d)", errno);
-        goto err_open_mpfd;
-    }
-
-    evctlfd = open(MEMCG_SYSFS_PATH "cgroup.event_control", O_WRONLY | O_CLOEXEC);
-    if (evctlfd < 0) {
-        ALOGI("No kernel memory cgroup event control (errno=%d)", errno);
-        goto err_open_evctlfd;
-    }
-
-    evfd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
-    if (evfd < 0) {
-        ALOGE("eventfd failed for level %s; errno=%d", levelstr, errno);
-        goto err_eventfd;
-    }
-
-    ret = snprintf(buf, sizeof(buf), "%d %d %s", evfd, mpfd, levelstr);
-    if (ret >= (ssize_t)sizeof(buf)) {
-        ALOGE("cgroup.event_control line overflow for level %s", levelstr);
-        goto err;
-    }
-
-    ret = TEMP_FAILURE_RETRY(write(evctlfd, buf, strlen(buf) + 1));
-    if (ret == -1) {
-        ALOGE("cgroup.event_control write failed for level %s; errno=%d",
-              levelstr, errno);
-        goto err;
-    }
-
-    epev.events = EPOLLIN;
-    /* use data to store event level */
-    vmpressure_hinfo[level_idx].data = level_idx;
-    vmpressure_hinfo[level_idx].handler = mp_event_common;
-    epev.data.ptr = (void *)&vmpressure_hinfo[level_idx];
-    ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, evfd, &epev);
-    if (ret == -1) {
-        ALOGE("epoll_ctl for level %s failed; errno=%d", levelstr, errno);
-        goto err;
-    }
-    maxevents++;
-    mpevfd[level] = evfd;
-    close(evctlfd);
-    return true;
-
-err:
-    close(evfd);
-err_eventfd:
-    close(evctlfd);
-err_open_evctlfd:
-    close(mpfd);
-err_open_mpfd:
-    return false;
-}
-
-#ifdef LMKD_LOG_STATS
-static int kernel_poll_fd = -1;
-
-static void poll_kernel() {
-    if (kernel_poll_fd == -1) {
-        // not waiting
-        return;
-    }
-
-    while (1) {
-        char rd_buf[256];
-        int bytes_read =
-                TEMP_FAILURE_RETRY(pread(kernel_poll_fd, (void*)rd_buf, sizeof(rd_buf), 0));
-        if (bytes_read <= 0) break;
-        rd_buf[bytes_read] = '\0';
-
-        int64_t pid;
-        int64_t uid;
-        int64_t group_leader_pid;
-        int64_t min_flt;
-        int64_t maj_flt;
-        int64_t rss_in_pages;
-        int16_t oom_score_adj;
-        int16_t min_score_adj;
-        int64_t starttime;
-        char* taskname = 0;
-        int fields_read = sscanf(rd_buf,
-                                 "%" SCNd64 " %" SCNd64 " %" SCNd64 " %" SCNd64 " %" SCNd64
-                                 " %" SCNd64 " %" SCNd16 " %" SCNd16 " %" SCNd64 "\n%m[^\n]",
-                                 &pid, &uid, &group_leader_pid, &min_flt, &maj_flt, &rss_in_pages,
-                                 &oom_score_adj, &min_score_adj, &starttime, &taskname);
-
-        /* only the death of the group leader process is logged */
-        if (fields_read == 10 && group_leader_pid == pid) {
-            int64_t process_start_time_ns = starttime * (NS_PER_SEC / sysconf(_SC_CLK_TCK));
-            stats_write_lmk_kill_occurred(log_ctx, LMK_KILL_OCCURRED, uid, taskname, oom_score_adj,
-                                          min_flt, maj_flt, rss_in_pages * PAGE_SIZE, 0, 0,
-                                          process_start_time_ns, min_score_adj);
-        }
-
-        free(taskname);
-    }
-}
-
-static struct event_handler_info kernel_poll_hinfo = {0, poll_kernel};
-
-static void init_poll_kernel() {
-    struct epoll_event epev;
-    kernel_poll_fd =
-            TEMP_FAILURE_RETRY(open("/proc/lowmemorykiller", O_RDONLY | O_NONBLOCK | O_CLOEXEC));
-
-    if (kernel_poll_fd < 0) {
-        ALOGE("kernel lmk event file could not be opened; errno=%d", kernel_poll_fd);
-        return;
-    }
-
-    epev.events = EPOLLIN;
-    epev.data.ptr = (void*)&kernel_poll_hinfo;
-    if (epoll_ctl(epollfd, EPOLL_CTL_ADD, kernel_poll_fd, &epev) != 0) {
-        ALOGE("epoll_ctl for lmk events failed; errno=%d", errno);
-        close(kernel_poll_fd);
-        kernel_poll_fd = -1;
-    } else {
-        maxevents++;
-    }
-}
-#endif
-
-static int init(void) {
-    struct epoll_event epev;
-    int i;
-    int ret;
-
-    page_k = sysconf(_SC_PAGESIZE);
-    if (page_k == -1)
-        page_k = PAGE_SIZE;
-    page_k /= 1024;
-
-    epollfd = epoll_create(MAX_EPOLL_EVENTS);
-    if (epollfd == -1) {
-        ALOGE("epoll_create failed (errno=%d)", errno);
-        return -1;
-    }
-
-    // mark data connections as not connected
-    for (int i = 0; i < MAX_DATA_CONN; i++) {
-        data_sock[i].sock = -1;
-    }
-
-    ctrl_sock.sock = android_get_control_socket("lmkd");
-    if (ctrl_sock.sock < 0) {
-        ALOGE("get lmkd control socket failed");
-        return -1;
-    }
-
-    ret = listen(ctrl_sock.sock, MAX_DATA_CONN);
-    if (ret < 0) {
-        ALOGE("lmkd control socket listen failed (errno=%d)", errno);
-        return -1;
-    }
-
-    epev.events = EPOLLIN;
-    ctrl_sock.handler_info.handler = ctrl_connect_handler;
-    epev.data.ptr = (void *)&(ctrl_sock.handler_info);
-    if (epoll_ctl(epollfd, EPOLL_CTL_ADD, ctrl_sock.sock, &epev) == -1) {
-        ALOGE("epoll_ctl for lmkd control socket failed (errno=%d)", errno);
-        return -1;
-    }
-    maxevents++;
-
-    has_inkernel_module = !access(INKERNEL_MINFREE_PATH, W_OK);
-    use_inkernel_interface = has_inkernel_module;
-
-    if (use_inkernel_interface) {
-        ALOGI("Using in-kernel low memory killer interface");
-#ifdef LMKD_LOG_STATS
-        if (enable_stats_log) {
-            init_poll_kernel();
-        }
-#endif
-    } else {
-        /* Try to use psi monitor first if kernel has it */
-        use_psi_monitors = property_get_bool("ro.lmk.use_psi", true) &&
-            init_psi_monitors();
-        /* Fall back to vmpressure */
-        if (!use_psi_monitors &&
-            (!init_mp_common(VMPRESS_LEVEL_LOW) ||
-            !init_mp_common(VMPRESS_LEVEL_MEDIUM) ||
-            !init_mp_common(VMPRESS_LEVEL_CRITICAL))) {
-            ALOGE("Kernel does not support memory pressure events or in-kernel low memory killer");
-            return -1;
-        }
-        if (use_psi_monitors) {
-            ALOGI("Using psi monitors for memory pressure detection");
-        } else {
-            ALOGI("Using vmpressure for memory pressure detection");
-        }
-    }
-
-    for (i = 0; i <= ADJTOSLOT(OOM_SCORE_ADJ_MAX); i++) {
-        procadjslot_list[i].next = &procadjslot_list[i];
-        procadjslot_list[i].prev = &procadjslot_list[i];
-    }
-
-    memset(killcnt_idx, KILLCNT_INVALID_IDX, sizeof(killcnt_idx));
-
-    return 0;
-}
-
-static void mainloop(void) {
-    struct event_handler_info* handler_info;
-    struct event_handler_info* poll_handler = NULL;
-    struct timespec last_report_tm, curr_tm;
-    struct epoll_event *evt;
-    long delay = -1;
-    int polling = 0;
-
-    while (1) {
-        struct epoll_event events[maxevents];
-        int nevents;
-        int i;
-
-        if (polling) {
-            /* Calculate next timeout */
-            clock_gettime(CLOCK_MONOTONIC_COARSE, &curr_tm);
-            delay = get_time_diff_ms(&last_report_tm, &curr_tm);
-            delay = (delay < PSI_POLL_PERIOD_MS) ?
-                PSI_POLL_PERIOD_MS - delay : PSI_POLL_PERIOD_MS;
-
-            /* Wait for events until the next polling timeout */
-            nevents = epoll_wait(epollfd, events, maxevents, delay);
-
-            clock_gettime(CLOCK_MONOTONIC_COARSE, &curr_tm);
-            if (get_time_diff_ms(&last_report_tm, &curr_tm) >= PSI_POLL_PERIOD_MS) {
-                polling--;
-                poll_handler->handler(poll_handler->data, 0);
-                last_report_tm = curr_tm;
-            }
-        } else {
-            /* Wait for events with no timeout */
-            nevents = epoll_wait(epollfd, events, maxevents, -1);
-        }
-
-        if (nevents == -1) {
-            if (errno == EINTR)
-                continue;
-            ALOGE("epoll_wait failed (errno=%d)", errno);
-            continue;
-        }
-
-        /*
-         * First pass to see if any data socket connections were dropped.
-         * Dropped connection should be handled before any other events
-         * to deallocate data connection and correctly handle cases when
-         * connection gets dropped and reestablished in the same epoll cycle.
-         * In such cases it's essential to handle connection closures first.
-         */
-        for (i = 0, evt = &events[0]; i < nevents; ++i, evt++) {
-            if ((evt->events & EPOLLHUP) && evt->data.ptr) {
-                ALOGI("lmkd data connection dropped");
-                handler_info = (struct event_handler_info*)evt->data.ptr;
-                ctrl_data_close(handler_info->data);
-            }
-        }
-
-        /* Second pass to handle all other events */
-        for (i = 0, evt = &events[0]; i < nevents; ++i, evt++) {
-            if (evt->events & EPOLLERR)
-                ALOGD("EPOLLERR on event #%d", i);
-            if (evt->events & EPOLLHUP) {
-                /* This case was handled in the first pass */
-                continue;
-            }
-            if (evt->data.ptr) {
-                handler_info = (struct event_handler_info*)evt->data.ptr;
-                handler_info->handler(handler_info->data, evt->events);
-
-                if (use_psi_monitors && handler_info->handler == mp_event_common) {
-                    /*
-                     * Poll for the duration of PSI_WINDOW_SIZE_MS after the
-                     * initial PSI event because psi events are rate-limited
-                     * at one per sec.
-                     */
-                    polling = PSI_POLL_COUNT;
-                    poll_handler = handler_info;
-                    clock_gettime(CLOCK_MONOTONIC_COARSE, &last_report_tm);
-                }
-            }
-        }
-    }
-}
-
-int main(int argc __unused, char **argv __unused) {
-    struct sched_param param = {
-            .sched_priority = 1,
-    };
-
-    /* By default disable low level vmpressure events */
-    level_oomadj[VMPRESS_LEVEL_LOW] =
-        property_get_int32("ro.lmk.low", OOM_SCORE_ADJ_MAX + 1);
-    level_oomadj[VMPRESS_LEVEL_MEDIUM] =
-        property_get_int32("ro.lmk.medium", 800);
-    level_oomadj[VMPRESS_LEVEL_CRITICAL] =
-        property_get_int32("ro.lmk.critical", 0);
-    debug_process_killing = property_get_bool("ro.lmk.debug", false);
-
-    /* By default disable upgrade/downgrade logic */
-    enable_pressure_upgrade =
-        property_get_bool("ro.lmk.critical_upgrade", false);
-    upgrade_pressure =
-        (int64_t)property_get_int32("ro.lmk.upgrade_pressure", 100);
-    downgrade_pressure =
-        (int64_t)property_get_int32("ro.lmk.downgrade_pressure", 100);
-    kill_heaviest_task =
-        property_get_bool("ro.lmk.kill_heaviest_task", false);
-    low_ram_device = property_get_bool("ro.config.low_ram", false);
-    kill_timeout_ms =
-        (unsigned long)property_get_int32("ro.lmk.kill_timeout_ms", 0);
-    use_minfree_levels =
-        property_get_bool("ro.lmk.use_minfree_levels", false);
-    per_app_memcg =
-        property_get_bool("ro.config.per_app_memcg", low_ram_device);
-    swap_free_low_percentage =
-        property_get_int32("ro.lmk.swap_free_low_percentage", 10);
-
-    ctx = create_android_logger(MEMINFO_LOG_TAG);
-
-#ifdef LMKD_LOG_STATS
-    statslog_init(&log_ctx, &enable_stats_log);
-#endif
-
-    if (!init()) {
-        if (!use_inkernel_interface) {
-            /*
-             * MCL_ONFAULT pins pages as they fault instead of loading
-             * everything immediately all at once. (Which would be bad,
-             * because as of this writing, we have a lot of mapped pages we
-             * never use.) Old kernels will see MCL_ONFAULT and fail with
-             * EINVAL; we ignore this failure.
-             *
-             * N.B. read the man page for mlockall. MCL_CURRENT | MCL_ONFAULT
-             * pins ⊆ MCL_CURRENT, converging to just MCL_CURRENT as we fault
-             * in pages.
-             */
-            /* CAP_IPC_LOCK required */
-            if (mlockall(MCL_CURRENT | MCL_FUTURE | MCL_ONFAULT) && (errno != EINVAL)) {
-                ALOGW("mlockall failed %s", strerror(errno));
-            }
-
-            /* CAP_NICE required */
-            if (sched_setscheduler(0, SCHED_FIFO, &param)) {
-                ALOGW("set SCHED_FIFO failed %s", strerror(errno));
-            }
-        }
-
-        mainloop();
-    }
-
-#ifdef LMKD_LOG_STATS
-    statslog_destroy(&log_ctx);
-#endif
-
-    android_log_destroy(&ctx);
-
-    ALOGI("exiting");
-    return 0;
-}
diff --git a/lmkd/lmkd.rc b/lmkd/lmkd.rc
deleted file mode 100644
index 76b6055..0000000
--- a/lmkd/lmkd.rc
+++ /dev/null
@@ -1,8 +0,0 @@
-service lmkd /system/bin/lmkd
-    class core
-    user lmkd
-    group lmkd system readproc
-    capabilities DAC_OVERRIDE KILL IPC_LOCK SYS_NICE SYS_RESOURCE
-    critical
-    socket lmkd seqpacket 0660 system system
-    writepid /dev/cpuset/system-background/tasks
diff --git a/lmkd/statslog.c b/lmkd/statslog.c
deleted file mode 100644
index 0c230ae..0000000
--- a/lmkd/statslog.c
+++ /dev/null
@@ -1,126 +0,0 @@
-/*
- *  Copyright 2018 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#include <assert.h>
-#include <errno.h>
-#include <log/log_id.h>
-#include <stats_event_list.h>
-#include <time.h>
-
-static int64_t getElapsedRealTimeNs() {
-    struct timespec t;
-    t.tv_sec = t.tv_nsec = 0;
-    clock_gettime(CLOCK_BOOTTIME, &t);
-    return (int64_t)t.tv_sec * 1000000000LL + t.tv_nsec;
-}
-
-/**
- * Logs the change in LMKD state which is used as start/stop boundaries for logging
- * LMK_KILL_OCCURRED event.
- * Code: LMK_STATE_CHANGED = 54
- */
-int
-stats_write_lmk_state_changed(android_log_context ctx, int32_t code, int32_t state) {
-    assert(ctx != NULL);
-    int ret = -EINVAL;
-    if (!ctx) {
-        return ret;
-    }
-
-    reset_log_context(ctx);
-
-    if ((ret = android_log_write_int64(ctx, getElapsedRealTimeNs())) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int32(ctx, code)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int32(ctx, state)) < 0) {
-        return ret;
-    }
-
-    return write_to_logger(ctx, LOG_ID_STATS);
-}
-
-/**
- * Logs the event when LMKD kills a process to reduce memory pressure.
- * Code: LMK_KILL_OCCURRED = 51
- */
-int
-stats_write_lmk_kill_occurred(android_log_context ctx, int32_t code, int32_t uid,
-                              char const* process_name, int32_t oom_score, int64_t pgfault,
-                              int64_t pgmajfault, int64_t rss_in_bytes, int64_t cache_in_bytes,
-                              int64_t swap_in_bytes, int64_t process_start_time_ns,
-                              int32_t min_oom_score) {
-    assert(ctx != NULL);
-    int ret = -EINVAL;
-    if (!ctx) {
-        return ret;
-    }
-    reset_log_context(ctx);
-
-    if ((ret = android_log_write_int64(ctx, getElapsedRealTimeNs())) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int32(ctx, code)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int32(ctx, uid)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_string8(ctx, (process_name == NULL) ? "" : process_name)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int32(ctx, oom_score)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int64(ctx, pgfault)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int64(ctx, pgmajfault)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int64(ctx, rss_in_bytes)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int64(ctx, cache_in_bytes)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int64(ctx, swap_in_bytes)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int64(ctx, process_start_time_ns)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int32(ctx, min_oom_score)) < 0) {
-        return ret;
-    }
-
-    return write_to_logger(ctx, LOG_ID_STATS);
-}
diff --git a/lmkd/statslog.h b/lmkd/statslog.h
deleted file mode 100644
index 2edba7a..0000000
--- a/lmkd/statslog.h
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- *  Copyright 2018 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#ifndef _STATSLOG_H_
-#define _STATSLOG_H_
-
-#include <assert.h>
-#include <stats_event_list.h>
-#include <stdbool.h>
-#include <sys/cdefs.h>
-
-#include <cutils/properties.h>
-
-__BEGIN_DECLS
-
-/*
- * These are defined in
- * http://cs/android/frameworks/base/cmds/statsd/src/atoms.proto
- */
-#define LMK_KILL_OCCURRED 51
-#define LMK_STATE_CHANGED 54
-#define LMK_STATE_CHANGE_START 1
-#define LMK_STATE_CHANGE_STOP 2
-
-/*
- * The single event tag id for all stats logs.
- * Keep this in sync with system/core/logcat/event.logtags
- */
-const static int kStatsEventTag = 1937006964;
-
-static inline void statslog_init(android_log_context* log_ctx, bool* enable_stats_log) {
-    assert(log_ctx != NULL);
-    assert(enable_stats_log != NULL);
-    *enable_stats_log = property_get_bool("ro.lmk.log_stats", false);
-
-    if (*enable_stats_log) {
-        *log_ctx = create_android_logger(kStatsEventTag);
-    }
-}
-
-static inline void statslog_destroy(android_log_context* log_ctx) {
-    assert(log_ctx != NULL);
-    if (*log_ctx) {
-        android_log_destroy(log_ctx);
-    }
-}
-
-struct memory_stat {
-    int64_t pgfault;
-    int64_t pgmajfault;
-    int64_t rss_in_bytes;
-    int64_t cache_in_bytes;
-    int64_t swap_in_bytes;
-    int64_t process_start_time_ns;
-};
-
-#define MEMCG_PROCESS_MEMORY_STAT_PATH "/dev/memcg/apps/uid_%u/pid_%u/memory.stat"
-#define PROC_STAT_FILE_PATH "/proc/%d/stat"
-#define PROC_STAT_BUFFER_SIZE 1024
-#define BYTES_IN_KILOBYTE 1024
-
-/**
- * Logs the change in LMKD state which is used as start/stop boundaries for logging
- * LMK_KILL_OCCURRED event.
- * Code: LMK_STATE_CHANGED = 54
- */
-int
-stats_write_lmk_state_changed(android_log_context ctx, int32_t code, int32_t state);
-
-/**
- * Logs the event when LMKD kills a process to reduce memory pressure.
- * Code: LMK_KILL_OCCURRED = 51
- */
-int
-stats_write_lmk_kill_occurred(android_log_context ctx, int32_t code, int32_t uid,
-                              char const* process_name, int32_t oom_score, int64_t pgfault,
-                              int64_t pgmajfault, int64_t rss_in_bytes, int64_t cache_in_bytes,
-                              int64_t swap_in_bytes, int64_t process_start_time_ns,
-                              int32_t min_oom_score);
-
-__END_DECLS
-
-#endif /* _STATSLOG_H_ */
diff --git a/lmkd/tests/Android.bp b/lmkd/tests/Android.bp
deleted file mode 100644
index 4e845fd..0000000
--- a/lmkd/tests/Android.bp
+++ /dev/null
@@ -1,41 +0,0 @@
-// Copyright (C) 2018 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-cc_test {
-    name: "lmkd_unit_test",
-
-    shared_libs: [
-        "libbase",
-        "liblog",
-        "libcutils",
-    ],
-
-    static_libs: [
-        "liblmkd_utils",
-    ],
-
-    target: {
-        android: {
-            srcs: ["lmkd_test.cpp"],
-        },
-    },
-
-    cflags: [
-        "-Wall",
-        "-Wextra",
-        "-Werror",
-    ],
-
-    compile_multilib: "first",
-}
diff --git a/lmkd/tests/lmkd_test.cpp b/lmkd/tests/lmkd_test.cpp
deleted file mode 100644
index f54b25c..0000000
--- a/lmkd/tests/lmkd_test.cpp
+++ /dev/null
@@ -1,374 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sstream>
-#include <stdio.h>
-#include <string.h>
-#include <string>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/properties.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-#include <gtest/gtest.h>
-#include <lmkd.h>
-#include <liblmkd_utils.h>
-#include <log/log_properties.h>
-#include <private/android_filesystem_config.h>
-
-using namespace android::base;
-
-#define INKERNEL_MINFREE_PATH "/sys/module/lowmemorykiller/parameters/minfree"
-#define LMKDTEST_RESPAWN_FLAG "LMKDTEST_RESPAWN"
-
-#define LMKD_LOGCAT_MARKER "lowmemorykiller"
-#define LMKD_KILL_MARKER_TEMPLATE LMKD_LOGCAT_MARKER ": Kill '%s'"
-#define OOM_MARKER "Out of memory"
-#define OOM_KILL_MARKER "Killed process"
-#define MIN_LOG_SIZE 100
-
-#define ONE_MB (1 << 20)
-
-/* Test constant parameters */
-#define OOM_ADJ_MAX 1000
-#define OOM_ADJ_MIN 0
-#define OOM_ADJ_STEP 100
-#define STEP_COUNT ((OOM_ADJ_MAX - OOM_ADJ_MIN) / OOM_ADJ_STEP + 1)
-
-#define ALLOC_STEP (ONE_MB)
-#define ALLOC_DELAY 1000
-
-/* Utility functions */
-std::string readCommand(const std::string& command) {
-    FILE* fp = popen(command.c_str(), "r");
-    std::string content;
-    ReadFdToString(fileno(fp), &content);
-    pclose(fp);
-    return content;
-}
-
-std::string readLogcat(const std::string& marker) {
-    std::string content = readCommand("logcat -d -b all");
-    size_t pos = content.find(marker);
-    if (pos == std::string::npos) return "";
-    content.erase(0, pos);
-    return content;
-}
-
-bool writeFile(const std::string& file, const std::string& string) {
-    if (getuid() == static_cast<unsigned>(AID_ROOT)) {
-        return WriteStringToFile(string, file);
-    }
-    return string == readCommand(
-        "echo -n '" + string + "' | su root tee " + file + " 2>&1");
-}
-
-bool writeKmsg(const std::string& marker) {
-    return writeFile("/dev/kmsg", marker);
-}
-
-std::string getTextAround(const std::string& text, size_t pos,
-                          size_t lines_before, size_t lines_after) {
-    size_t start_pos = pos;
-
-    // find start position
-    // move up lines_before number of lines
-    while (lines_before > 0 &&
-           (start_pos = text.rfind('\n', start_pos)) != std::string::npos) {
-        lines_before--;
-    }
-    // move to the beginning of the line
-    start_pos = text.rfind('\n', start_pos);
-    start_pos = (start_pos == std::string::npos) ? 0 : start_pos + 1;
-
-    // find end position
-    // move down lines_after number of lines
-    while (lines_after > 0 &&
-           (pos = text.find('\n', pos)) != std::string::npos) {
-        pos++;
-        lines_after--;
-    }
-    return text.substr(start_pos, (pos == std::string::npos) ?
-                       std::string::npos : pos - start_pos);
-}
-
-bool getExecPath(std::string &path) {
-    char buf[PATH_MAX + 1];
-    int ret = readlink("/proc/self/exe", buf, sizeof(buf) - 1);
-    if (ret < 0) {
-        return false;
-    }
-    buf[ret] = '\0';
-    path = buf;
-    return true;
-}
-
-/* Child synchronization primitives */
-#define STATE_INIT 0
-#define STATE_CHILD_READY 1
-#define STATE_PARENT_READY 2
-
-struct state_sync {
-    pthread_mutex_t mutex;
-    pthread_cond_t condition;
-    int state;
-};
-
-struct state_sync * init_state_sync_obj() {
-    struct state_sync *ssync;
-
-    ssync = (struct state_sync*)mmap(NULL, sizeof(struct state_sync),
-                PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_SHARED, -1, 0);
-    if (ssync == MAP_FAILED) {
-        return NULL;
-    }
-
-    pthread_mutexattr_t mattr;
-    pthread_mutexattr_init(&mattr);
-    pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED);
-    pthread_mutex_init(&ssync->mutex, &mattr);
-
-    pthread_condattr_t cattr;
-    pthread_condattr_init(&cattr);
-    pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED);
-    pthread_cond_init(&ssync->condition, &cattr);
-
-    ssync->state = STATE_INIT;
-    return ssync;
-}
-
-void destroy_state_sync_obj(struct state_sync *ssync) {
-    pthread_cond_destroy(&ssync->condition);
-    pthread_mutex_destroy(&ssync->mutex);
-    munmap(ssync, sizeof(struct state_sync));
-}
-
-void signal_state(struct state_sync *ssync, int state) {
-    pthread_mutex_lock(&ssync->mutex);
-    ssync->state = state;
-    pthread_cond_signal(&ssync->condition);
-    pthread_mutex_unlock(&ssync->mutex);
-}
-
-void wait_for_state(struct state_sync *ssync, int state) {
-    pthread_mutex_lock(&ssync->mutex);
-    while (ssync->state != state) {
-        pthread_cond_wait(&ssync->condition, &ssync->mutex);
-    }
-    pthread_mutex_unlock(&ssync->mutex);
-}
-
-/* Memory allocation and data sharing */
-struct shared_data {
-    size_t allocated;
-    bool finished;
-    size_t total_size;
-    size_t step_size;
-    size_t step_delay;
-    int oomadj;
-};
-
-volatile void *gptr;
-void add_pressure(struct shared_data *data) {
-    volatile void *ptr;
-    size_t allocated_size = 0;
-
-    data->finished = false;
-    while (allocated_size < data->total_size) {
-        ptr = mmap(NULL, data->step_size, PROT_READ | PROT_WRITE,
-                MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
-        if (ptr != MAP_FAILED) {
-            /* create ptr aliasing to prevent compiler optimizing the access */
-            gptr = ptr;
-            /* make data non-zero */
-            memset((void*)ptr, (int)(allocated_size + 1), data->step_size);
-            allocated_size += data->step_size;
-            data->allocated = allocated_size;
-        }
-        usleep(data->step_delay);
-    }
-    data->finished = (allocated_size >= data->total_size);
-}
-
-/* Memory stress test main body */
-void runMemStressTest() {
-    struct shared_data *data;
-    struct state_sync *ssync;
-    int sock;
-    pid_t pid;
-    uid_t uid = getuid();
-
-    // check if in-kernel LMK driver is present
-    if (!access(INKERNEL_MINFREE_PATH, W_OK)) {
-        GTEST_LOG_(INFO) << "Must not have kernel lowmemorykiller driver,"
-                         << " terminating test";
-        return;
-    }
-
-    ASSERT_FALSE((sock = lmkd_connect()) < 0)
-        << "Failed to connect to lmkd process, err=" << strerror(errno);
-
-    /* allocate shared memory to communicate params with a child */
-    data = (struct shared_data*)mmap(NULL, sizeof(struct shared_data),
-                PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_SHARED, -1, 0);
-    ASSERT_FALSE(data == MAP_FAILED) << "Memory allocation failure";
-    data->total_size = (size_t)-1; /* allocate until killed */
-    data->step_size = ALLOC_STEP;
-    data->step_delay = ALLOC_DELAY;
-
-    /* allocate state sync object */
-    ASSERT_FALSE((ssync = init_state_sync_obj()) == NULL)
-        << "Memory allocation failure";
-
-    /* run the test gradually decreasing oomadj */
-    data->oomadj = OOM_ADJ_MAX;
-    while (data->oomadj >= OOM_ADJ_MIN) {
-        ASSERT_FALSE((pid = fork()) < 0)
-            << "Failed to spawn a child process, err=" << strerror(errno);
-        if (pid != 0) {
-            /* Parent */
-            struct lmk_procprio params;
-            /* wait for child to start and get ready */
-            wait_for_state(ssync, STATE_CHILD_READY);
-            params.pid = pid;
-            params.uid = uid;
-            params.oomadj = data->oomadj;
-            ASSERT_FALSE(lmkd_register_proc(sock, &params) < 0)
-                << "Failed to communicate with lmkd, err=" << strerror(errno);
-            // signal the child it can proceed
-            signal_state(ssync, STATE_PARENT_READY);
-            waitpid(pid, NULL, 0);
-            if (data->finished) {
-                GTEST_LOG_(INFO) << "Child [pid=" << pid << "] allocated "
-                                 << data->allocated / ONE_MB << "MB";
-            } else {
-                GTEST_LOG_(INFO) << "Child [pid=" << pid << "] allocated "
-                                 << data->allocated / ONE_MB
-                                 << "MB before being killed";
-            }
-            data->oomadj -= OOM_ADJ_STEP;
-        } else {
-            /* Child */
-            pid = getpid();
-            GTEST_LOG_(INFO) << "Child [pid=" << pid
-                             << "] is running at oomadj="
-                             << data->oomadj;
-            data->allocated = 0;
-            data->finished = false;
-            ASSERT_FALSE(create_memcg(uid, pid) != 0)
-                << "Child [pid=" << pid << "] failed to create a cgroup";
-            signal_state(ssync, STATE_CHILD_READY);
-            wait_for_state(ssync, STATE_PARENT_READY);
-            add_pressure(data);
-            /* should not reach here, child should be killed by OOM/LMK */
-            FAIL() << "Child [pid=" << pid << "] was not killed";
-            break;
-        }
-    }
-    destroy_state_sync_obj(ssync);
-    munmap(data, sizeof(struct shared_data));
-    close(sock);
-}
-
-TEST(lmkd, check_for_oom) {
-    // test requirements
-    //   userdebug build
-    if (!__android_log_is_debuggable()) {
-        GTEST_LOG_(INFO) << "Must be userdebug build, terminating test";
-        return;
-    }
-
-    // if respawned test process then run the test and exit (no analysis)
-    if (getenv(LMKDTEST_RESPAWN_FLAG) != NULL) {
-        runMemStressTest();
-        return;
-    }
-
-    // Main test process
-    // mark the beginning of the test
-    std::string marker = StringPrintf(
-        "LMKD test start %lu\n", static_cast<unsigned long>(time(nullptr)));
-    ASSERT_TRUE(writeKmsg(marker));
-
-    // get executable complete path
-    std::string test_path;
-    ASSERT_TRUE(getExecPath(test_path));
-
-    std::string test_output;
-    if (getuid() != static_cast<unsigned>(AID_ROOT)) {
-        // if not root respawn itself as root and capture output
-        std::string command = StringPrintf(
-            "%s=true su root %s 2>&1", LMKDTEST_RESPAWN_FLAG,
-            test_path.c_str());
-        std::string test_output = readCommand(command);
-        GTEST_LOG_(INFO) << test_output;
-    } else {
-        // main test process is root, run the test
-        runMemStressTest();
-    }
-
-    // Analyze results
-    // capture logcat containind kernel logs
-    std::string logcat_out = readLogcat(marker);
-
-    // 1. extract LMKD kills from logcat output, count kills
-    std::stringstream kill_logs;
-    int hit_count = 0;
-    size_t pos = 0;
-    marker = StringPrintf(LMKD_KILL_MARKER_TEMPLATE, test_path.c_str());
-
-    while (true) {
-        if ((pos = logcat_out.find(marker, pos)) != std::string::npos) {
-            kill_logs << getTextAround(logcat_out, pos, 0, 1);
-            pos += marker.length();
-            hit_count++;
-        } else {
-            break;
-        }
-    }
-    GTEST_LOG_(INFO) << "====Logged kills====" << std::endl
-                     << kill_logs.str();
-    EXPECT_TRUE(hit_count == STEP_COUNT) << "Number of kills " << hit_count
-                                         << " is less than expected "
-                                         << STEP_COUNT;
-
-    // 2. check kernel logs for OOM kills
-    pos = logcat_out.find(OOM_MARKER);
-    bool oom_detected = (pos != std::string::npos);
-    bool oom_kill_detected = (oom_detected &&
-        logcat_out.find(OOM_KILL_MARKER, pos) != std::string::npos);
-
-    EXPECT_FALSE(oom_kill_detected) << "OOM kill is detected!";
-    if (oom_detected || oom_kill_detected) {
-        // capture logcat with logs around all OOMs
-        pos = 0;
-        while ((pos = logcat_out.find(OOM_MARKER, pos)) != std::string::npos) {
-            GTEST_LOG_(INFO) << "====Logs around OOM====" << std::endl
-                             << getTextAround(logcat_out, pos,
-                                    MIN_LOG_SIZE / 2, MIN_LOG_SIZE / 2);
-            pos += strlen(OOM_MARKER);
-        }
-    }
-
-    // output complete logcat with kernel (might get truncated)
-    GTEST_LOG_(INFO) << "====Complete logcat output====" << std::endl
-                     << logcat_out;
-}
-
diff --git a/logcat/Android.bp b/logcat/Android.bp
index f1b18b2..61fba59 100644
--- a/logcat/Android.bp
+++ b/logcat/Android.bp
@@ -21,6 +21,7 @@
         "-Wall",
         "-Wextra",
         "-Werror",
+        "-DANDROID_BASE_UNIQUE_FD_DISABLE_IMPLICIT_CONVERSION=1",
     ],
     shared_libs: [
         "libbase",
@@ -35,31 +36,22 @@
 
     defaults: ["logcat_defaults"],
     srcs: [
-        "logcat_main.cpp",
         "logcat.cpp",
     ],
 }
 
-cc_binary {
+sh_binary {
     name: "logcatd",
-
-    defaults: ["logcat_defaults"],
-    srcs: [
-        "logcatd_main.cpp",
-        "logcat.cpp",
-    ],
+    src: "logcatd",
 }
 
-cc_prebuilt_binary {
+sh_binary {
     name: "logpersist.start",
-    srcs: ["logpersist"],
+    src: "logpersist",
     init_rc: ["logcatd.rc"],
     required: ["logcatd"],
     symlinks: [
         "logpersist.stop",
         "logpersist.cat",
     ],
-    strip: {
-        none: true,
-    },
 }
diff --git a/logcat/logcat.cpp b/logcat/logcat.cpp
index e2711af..7b18438 100644
--- a/logcat/logcat.cpp
+++ b/logcat/logcat.cpp
@@ -14,32 +14,26 @@
  * limitations under the License.
  */
 
-#include "logcat.h"
-
-#include <android-base/macros.h>
-#include <arpa/inet.h>
-#include <assert.h>
 #include <ctype.h>
 #include <dirent.h>
 #include <errno.h>
+#include <error.h>
 #include <fcntl.h>
 #include <getopt.h>
 #include <math.h>
-#include <pthread.h>
 #include <sched.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/cdefs.h>
+#include <sys/ioctl.h>
 #include <sys/resource.h>
-#include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <time.h>
 #include <unistd.h>
 
-#include <atomic>
 #include <memory>
 #include <regex>
 #include <string>
@@ -47,11 +41,15 @@
 #include <vector>
 
 #include <android-base/file.h>
+#include <android-base/macros.h>
+#include <android-base/parseint.h>
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
-#include <cutils/sockets.h>
+#include <android-base/unique_fd.h>
+#include <android/log.h>
 #include <log/event_tag_map.h>
+#include <log/log_id.h>
 #include <log/logprint.h>
 #include <private/android_logger.h>
 #include <processgroup/sched_policy.h>
@@ -59,209 +57,94 @@
 
 #define DEFAULT_MAX_ROTATED_LOGS 4
 
-struct log_device_t {
-    const char* device;
-    bool binary;
-    struct logger* logger;
-    struct logger_list* logger_list;
-    bool printed;
+using android::base::Join;
+using android::base::ParseByteCount;
+using android::base::ParseUint;
+using android::base::Split;
+using android::base::StringPrintf;
 
-    log_device_t* next;
+class Logcat {
+  public:
+    int Run(int argc, char** argv);
 
-    log_device_t(const char* d, bool b) {
-        device = d;
-        binary = b;
-        next = nullptr;
-        printed = false;
-        logger = nullptr;
-        logger_list = nullptr;
-    }
+  private:
+    void RotateLogs();
+    void ProcessBuffer(struct log_msg* buf);
+    void PrintDividers(log_id_t log_id, bool print_dividers);
+    void SetupOutputAndSchedulingPolicy(bool blocking);
+    int SetLogFormat(const char* format_string);
+
+    // Used for all options
+    android::base::unique_fd output_fd_{dup(STDOUT_FILENO)};
+    std::unique_ptr<AndroidLogFormat, decltype(&android_log_format_free)> logformat_{
+            android_log_format_new(), &android_log_format_free};
+
+    // For logging to a file and log rotation
+    const char* output_file_name_ = nullptr;
+    size_t log_rotate_size_kb_ = 0;                       // 0 means "no log rotation"
+    size_t max_rotated_logs_ = DEFAULT_MAX_ROTATED_LOGS;  // 0 means "unbounded"
+    size_t out_byte_count_ = 0;
+
+    // For binary log buffers
+    int print_binary_ = 0;
+    std::unique_ptr<EventTagMap, decltype(&android_closeEventTagMap)> event_tag_map_{
+            nullptr, &android_closeEventTagMap};
+    bool has_opened_event_tag_map_ = false;
+
+    // For the related --regex, --max-count, --print
+    std::unique_ptr<std::regex> regex_;
+    size_t max_count_ = 0;  // 0 means "infinite"
+    size_t print_count_ = 0;
+    bool print_it_anyways_ = false;
+
+    // For PrintDividers()
+    log_id_t last_printed_id_ = LOG_ID_MAX;
+    bool printed_start_[LOG_ID_MAX] = {};
+
+    bool debug_ = false;
 };
 
-struct android_logcat_context_internal {
-    // status
-    volatile std::atomic_int retval;  // valid if thread_stopped set
-    // Arguments passed in, or copies and storage thereof if a thread.
-    int argc;
-    char* const* argv;
-    char* const* envp;
-    std::vector<std::string> args;
-    std::vector<const char*> argv_hold;
-    std::vector<std::string> envs;
-    std::vector<const char*> envp_hold;
-    int output_fd;  // duplication of fileno(output) (below)
-    int error_fd;   // duplication of fileno(error) (below)
+#ifndef F2FS_IOC_SET_PIN_FILE
+#define F2FS_IOCTL_MAGIC       0xf5
+#define F2FS_IOC_SET_PIN_FILE _IOW(F2FS_IOCTL_MAGIC, 13, __u32)
+#endif
 
-    // library
-    int fds[2];    // From popen call
-    FILE* output;  // everything writes to fileno(output), buffer unused
-    FILE* error;   // unless error == output.
-    pthread_t thr;
-    volatile std::atomic_bool stop;  // quick exit flag
-    volatile std::atomic_bool thread_stopped;
-    bool stderr_null;    // shell "2>/dev/null"
-    bool stderr_stdout;  // shell "2>&1"
+static int openLogFile(const char* pathname, size_t sizeKB) {
+    int fd = open(pathname, O_WRONLY | O_APPEND | O_CREAT | O_CLOEXEC, S_IRUSR | S_IWUSR);
+    if (fd < 0) {
+        return fd;
+    }
 
-    // global variables
-    AndroidLogFormat* logformat;
-    const char* outputFileName;
-    // 0 means "no log rotation"
-    size_t logRotateSizeKBytes;
-    // 0 means "unbounded"
-    size_t maxRotatedLogs;
-    size_t outByteCount;
-    int printBinary;
-    int devCount;  // >1 means multiple
-    std::unique_ptr<std::regex> regex;
-    log_device_t* devices;
-    EventTagMap* eventTagMap;
-    // 0 means "infinite"
-    size_t maxCount;
-    size_t printCount;
-
-    bool printItAnyways;
-    bool debug;
-    bool hasOpenedEventTagMap;
-};
-
-// Creates a context associated with this logcat instance
-android_logcat_context create_android_logcat() {
-    android_logcat_context_internal* context;
-
-    context = (android_logcat_context_internal*)calloc(
-        1, sizeof(android_logcat_context_internal));
-    if (!context) return nullptr;
-
-    context->fds[0] = -1;
-    context->fds[1] = -1;
-    context->output_fd = -1;
-    context->error_fd = -1;
-    context->maxRotatedLogs = DEFAULT_MAX_ROTATED_LOGS;
-
-    context->argv_hold.clear();
-    context->args.clear();
-    context->envp_hold.clear();
-    context->envs.clear();
-
-    return (android_logcat_context)context;
+    // no need to check errors
+    __u32 set = 1;
+    ioctl(fd, F2FS_IOC_SET_PIN_FILE, &set);
+    fallocate(fd, FALLOC_FL_KEEP_SIZE, 0, (sizeKB << 10));
+    return fd;
 }
 
-// logd prefixes records with a length field
-#define RECORD_LENGTH_FIELD_SIZE_BYTES sizeof(uint32_t)
-
-namespace android {
-
-enum helpType { HELP_FALSE, HELP_TRUE, HELP_FORMAT };
-
-// if showHelp is set, newline required in fmt statement to transition to usage
-static void logcat_panic(android_logcat_context_internal* context,
-                         enum helpType showHelp, const char* fmt, ...)
-    __printflike(3, 4);
-
-static int openLogFile(const char* pathname) {
-    return open(pathname, O_WRONLY | O_APPEND | O_CREAT, S_IRUSR | S_IWUSR);
-}
-
-static void close_output(android_logcat_context_internal* context) {
-    // split output_from_error
-    if (context->error == context->output) {
-        context->output = nullptr;
-        context->output_fd = -1;
-    }
-    if (context->error && (context->output_fd == fileno(context->error))) {
-        context->output_fd = -1;
-    }
-    if (context->output_fd == context->error_fd) {
-        context->output_fd = -1;
-    }
-    // close output channel
-    if (context->output) {
-        if (context->output != stdout) {
-            if (context->output_fd == fileno(context->output)) {
-                context->output_fd = -1;
-            }
-            if (context->fds[1] == fileno(context->output)) {
-                context->fds[1] = -1;
-            }
-            fclose(context->output);
-        }
-        context->output = nullptr;
-    }
-    if (context->output_fd >= 0) {
-        if (context->output_fd != fileno(stdout)) {
-            if (context->fds[1] == context->output_fd) {
-                context->fds[1] = -1;
-            }
-            close(context->output_fd);
-        }
-        context->output_fd = -1;
-    }
-}
-
-static void close_error(android_logcat_context_internal* context) {
-    // split error_from_output
-    if (context->output == context->error) {
-        context->error = nullptr;
-        context->error_fd = -1;
-    }
-    if (context->output && (context->error_fd == fileno(context->output))) {
-        context->error_fd = -1;
-    }
-    if (context->error_fd == context->output_fd) {
-        context->error_fd = -1;
-    }
-    // close error channel
-    if (context->error) {
-        if ((context->error != stderr) && (context->error != stdout)) {
-            if (context->error_fd == fileno(context->error)) {
-                context->error_fd = -1;
-            }
-            if (context->fds[1] == fileno(context->error)) {
-                context->fds[1] = -1;
-            }
-            fclose(context->error);
-        }
-        context->error = nullptr;
-    }
-    if (context->error_fd >= 0) {
-        if ((context->error_fd != fileno(stdout)) &&
-            (context->error_fd != fileno(stderr))) {
-            if (context->fds[1] == context->error_fd) context->fds[1] = -1;
-            close(context->error_fd);
-        }
-        context->error_fd = -1;
-    }
-}
-
-static void rotateLogs(android_logcat_context_internal* context) {
-    int err;
-
+void Logcat::RotateLogs() {
     // Can't rotate logs if we're not outputting to a file
-    if (!context->outputFileName) return;
+    if (!output_file_name_) return;
 
-    close_output(context);
+    output_fd_.reset();
 
     // Compute the maximum number of digits needed to count up to
     // maxRotatedLogs in decimal.  eg:
     // maxRotatedLogs == 30
     //   -> log10(30) == 1.477
     //   -> maxRotationCountDigits == 2
-    int maxRotationCountDigits =
-        (context->maxRotatedLogs > 0)
-            ? (int)(floor(log10(context->maxRotatedLogs) + 1))
-            : 0;
+    int max_rotation_count_digits =
+            max_rotated_logs_ > 0 ? (int)(floor(log10(max_rotated_logs_) + 1)) : 0;
 
-    for (int i = context->maxRotatedLogs; i > 0; i--) {
-        std::string file1 = android::base::StringPrintf(
-            "%s.%.*d", context->outputFileName, maxRotationCountDigits, i);
+    for (int i = max_rotated_logs_; i > 0; i--) {
+        std::string file1 =
+                StringPrintf("%s.%.*d", output_file_name_, max_rotation_count_digits, i);
 
         std::string file0;
         if (!(i - 1)) {
-            file0 = android::base::StringPrintf("%s", context->outputFileName);
+            file0 = output_file_name_;
         } else {
-            file0 =
-                android::base::StringPrintf("%s.%.*d", context->outputFileName,
-                                            maxRotationCountDigits, i - 1);
+            file0 = StringPrintf("%s.%.*d", output_file_name_, max_rotation_count_digits, i - 1);
         }
 
         if (!file0.length() || !file1.length()) {
@@ -269,237 +152,200 @@
             break;
         }
 
-        err = rename(file0.c_str(), file1.c_str());
+        int err = rename(file0.c_str(), file1.c_str());
 
         if (err < 0 && errno != ENOENT) {
             perror("while rotating log files");
         }
     }
 
-    context->output_fd = openLogFile(context->outputFileName);
+    output_fd_.reset(openLogFile(output_file_name_, log_rotate_size_kb_));
 
-    if (context->output_fd < 0) {
-        logcat_panic(context, HELP_FALSE, "couldn't open output file");
-        return;
-    }
-    context->output = fdopen(context->output_fd, "web");
-    if (!context->output) {
-        logcat_panic(context, HELP_FALSE, "couldn't fdopen output file");
-        return;
-    }
-    if (context->stderr_stdout) {
-        close_error(context);
-        context->error = context->output;
-        context->error_fd = context->output_fd;
+    if (!output_fd_.ok()) {
+        error(EXIT_FAILURE, errno, "Couldn't open output file");
     }
 
-    context->outByteCount = 0;
+    out_byte_count_ = 0;
 }
 
-void printBinary(android_logcat_context_internal* context, struct log_msg* buf) {
-    size_t size = buf->len();
-
-    TEMP_FAILURE_RETRY(write(context->output_fd, buf, size));
-}
-
-static bool regexOk(android_logcat_context_internal* context,
-                    const AndroidLogEntry& entry) {
-    if (!context->regex) return true;
-
-    return std::regex_search(entry.message, entry.message + entry.messageLen, *context->regex);
-}
-
-static void processBuffer(android_logcat_context_internal* context,
-                          log_device_t* dev, struct log_msg* buf) {
+void Logcat::ProcessBuffer(struct log_msg* buf) {
     int bytesWritten = 0;
     int err;
     AndroidLogEntry entry;
     char binaryMsgBuf[1024];
 
-    if (dev->binary) {
-        if (!context->eventTagMap && !context->hasOpenedEventTagMap) {
-            context->eventTagMap = android_openEventTagMap(nullptr);
-            context->hasOpenedEventTagMap = true;
+    bool is_binary =
+            buf->id() == LOG_ID_EVENTS || buf->id() == LOG_ID_STATS || buf->id() == LOG_ID_SECURITY;
+
+    if (is_binary) {
+        if (!event_tag_map_ && !has_opened_event_tag_map_) {
+            event_tag_map_.reset(android_openEventTagMap(nullptr));
+            has_opened_event_tag_map_ = true;
         }
-        err = android_log_processBinaryLogBuffer(
-            &buf->entry_v1, &entry, context->eventTagMap, binaryMsgBuf,
-            sizeof(binaryMsgBuf));
+        err = android_log_processBinaryLogBuffer(&buf->entry, &entry, event_tag_map_.get(),
+                                                 binaryMsgBuf, sizeof(binaryMsgBuf));
         // printf(">>> pri=%d len=%d msg='%s'\n",
         //    entry.priority, entry.messageLen, entry.message);
     } else {
-        err = android_log_processLogBuffer(&buf->entry_v1, &entry);
+        err = android_log_processLogBuffer(&buf->entry, &entry);
     }
-    if ((err < 0) && !context->debug) return;
+    if (err < 0 && !debug_) return;
 
-    if (android_log_shouldPrintLine(
-            context->logformat, std::string(entry.tag, entry.tagLen).c_str(),
-            entry.priority)) {
-        bool match = regexOk(context, entry);
+    if (android_log_shouldPrintLine(logformat_.get(), std::string(entry.tag, entry.tagLen).c_str(),
+                                    entry.priority)) {
+        bool match = !regex_ ||
+                     std::regex_search(entry.message, entry.message + entry.messageLen, *regex_);
 
-        context->printCount += match;
-        if (match || context->printItAnyways) {
-            bytesWritten = android_log_printLogLine(context->logformat,
-                                                    context->output_fd, &entry);
+        print_count_ += match;
+        if (match || print_it_anyways_) {
+            bytesWritten = android_log_printLogLine(logformat_.get(), output_fd_.get(), &entry);
 
             if (bytesWritten < 0) {
-                logcat_panic(context, HELP_FALSE, "output error");
-                return;
+                error(EXIT_FAILURE, 0, "Output error.");
             }
         }
     }
 
-    context->outByteCount += bytesWritten;
+    out_byte_count_ += bytesWritten;
 
-    if (context->logRotateSizeKBytes > 0 &&
-        (context->outByteCount / 1024) >= context->logRotateSizeKBytes) {
-        rotateLogs(context);
+    if (log_rotate_size_kb_ > 0 && (out_byte_count_ / 1024) >= log_rotate_size_kb_) {
+        RotateLogs();
     }
 }
 
-static void maybePrintStart(android_logcat_context_internal* context,
-                            log_device_t* dev, bool printDividers) {
-    if (!dev->printed || printDividers) {
-        if (context->devCount > 1 && !context->printBinary) {
-            char buf[1024];
-            snprintf(buf, sizeof(buf), "--------- %s %s\n",
-                     dev->printed ? "switch to" : "beginning of", dev->device);
-            if (write(context->output_fd, buf, strlen(buf)) < 0) {
-                logcat_panic(context, HELP_FALSE, "output error");
-                return;
-            }
+void Logcat::PrintDividers(log_id_t log_id, bool print_dividers) {
+    if (log_id == last_printed_id_ || print_binary_) {
+        return;
+    }
+    if (!printed_start_[log_id] || print_dividers) {
+        if (dprintf(output_fd_.get(), "--------- %s %s\n",
+                    printed_start_[log_id] ? "switch to" : "beginning of",
+                    android_log_id_to_name(log_id)) < 0) {
+            error(EXIT_FAILURE, errno, "Output error");
         }
-        dev->printed = true;
     }
+    last_printed_id_ = log_id;
+    printed_start_[log_id] = true;
 }
 
-static void setupOutputAndSchedulingPolicy(
-    android_logcat_context_internal* context, bool blocking) {
-    if (!context->outputFileName) return;
+void Logcat::SetupOutputAndSchedulingPolicy(bool blocking) {
+    if (!output_file_name_) return;
 
     if (blocking) {
         // Lower priority and set to batch scheduling if we are saving
         // the logs into files and taking continuous content.
-        if ((set_sched_policy(0, SP_BACKGROUND) < 0) && context->error) {
-            fprintf(context->error,
-                    "failed to set background scheduling policy\n");
+        if (set_sched_policy(0, SP_BACKGROUND) < 0) {
+            fprintf(stderr, "failed to set background scheduling policy\n");
         }
 
-        struct sched_param param;
-        memset(&param, 0, sizeof(param));
+        struct sched_param param = {};
         if (sched_setscheduler((pid_t)0, SCHED_BATCH, &param) < 0) {
             fprintf(stderr, "failed to set to batch scheduler\n");
         }
 
-        if ((setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) &&
-            context->error) {
-            fprintf(context->error, "failed set to priority\n");
+        if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) {
+            fprintf(stderr, "failed set to priority\n");
         }
     }
 
-    close_output(context);
+    output_fd_.reset(openLogFile(output_file_name_, log_rotate_size_kb_));
 
-    context->output_fd = openLogFile(context->outputFileName);
-
-    if (context->output_fd < 0) {
-        logcat_panic(context, HELP_FALSE, "couldn't open output file");
-        return;
+    if (!output_fd_.ok()) {
+        error(EXIT_FAILURE, errno, "Couldn't open output file");
     }
 
     struct stat statbuf;
-    if (fstat(context->output_fd, &statbuf) == -1) {
-        close_output(context);
-        logcat_panic(context, HELP_FALSE, "couldn't get output file stat\n");
-        return;
+    if (fstat(output_fd_.get(), &statbuf) == -1) {
+        error(EXIT_FAILURE, errno, "Couldn't get output file stat");
     }
 
     if ((size_t)statbuf.st_size > SIZE_MAX || statbuf.st_size < 0) {
-        close_output(context);
-        logcat_panic(context, HELP_FALSE, "invalid output file stat\n");
-        return;
+        error(EXIT_FAILURE, 0, "Invalid output file stat.");
     }
 
-    context->output = fdopen(context->output_fd, "web");
-
-    context->outByteCount = statbuf.st_size;
+    out_byte_count_ = statbuf.st_size;
 }
 
 // clang-format off
-static void show_help(android_logcat_context_internal* context) {
-    if (!context->error) return;
+static void show_help() {
+    const char* cmd = getprogname();
 
-    const char* cmd = strrchr(context->argv[0], '/');
-    cmd = cmd ? cmd + 1 : context->argv[0];
+    fprintf(stderr, "Usage: %s [options] [filterspecs]\n", cmd);
 
-    fprintf(context->error, "Usage: %s [options] [filterspecs]\n", cmd);
+    fprintf(stderr, R"init(
+General options:
+  -b, --buffer=<buffer>       Request alternate ring buffer(s):
+                                main system radio events crash default all
+                              Additionally, 'kernel' for userdebug and eng builds, and
+                              'security' for Device Owner installations.
+                              Multiple -b parameters or comma separated list of buffers are
+                              allowed. Buffers are interleaved.
+                              Default -b main,system,crash,kernel.
+  -L, --last                  Dump logs from prior to last reboot from pstore.
+  -c, --clear                 Clear (flush) the entire log and exit.
+                              if -f is specified, clear the specified file and its related rotated
+                              log files instead.
+                              if -L is specified, clear pstore log instead.
+  -d                          Dump the log and then exit (don't block).
+  --pid=<pid>                 Only print logs from the given pid.
+  --wrap                      Sleep for 2 hours or when buffer about to wrap whichever
+                              comes first. Improves efficiency of polling by providing
+                              an about-to-wrap wakeup.
 
-    fprintf(context->error, "options include:\n"
-                    "  -s              Set default filter to silent. Equivalent to filterspec '*:S'\n"
-                    "  -f <file>, --file=<file>               Log to file. Default is stdout\n"
-                    "  -r <kbytes>, --rotate-kbytes=<kbytes>\n"
-                    "                  Rotate log every kbytes. Requires -f option\n"
-                    "  -n <count>, --rotate-count=<count>\n"
-                    "                  Sets max number of rotated logs to <count>, default 4\n"
-                    "  --id=<id>       If the signature id for logging to file changes, then clear\n"
-                    "                  the fileset and continue\n"
-                    "  -v <format>, --format=<format>\n"
-                    "                  Sets log print format verb and adverbs, where <format> is:\n"
-                    "                    brief help long process raw tag thread threadtime time\n"
-                    "                  and individually flagged modifying adverbs can be added:\n"
-                    "                    color descriptive epoch monotonic printable uid\n"
-                    "                    usec UTC year zone\n"
-                    "                  Multiple -v parameters or comma separated list of format and\n"
-                    "                  format modifiers are allowed.\n"
-                    // private and undocumented nsec, no signal, too much noise
-                    // useful for -T or -t <timestamp> accurate testing though.
-                    "  -D, --dividers  Print dividers between each log buffer\n"
-                    "  -c, --clear     Clear (flush) the entire log and exit\n"
-                    "                  if Log to File specified, clear fileset instead\n"
-                    "  -d              Dump the log and then exit (don't block)\n"
-                    "  -e <expr>, --regex=<expr>\n"
-                    "                  Only print lines where the log message matches <expr>\n"
-                    "                  where <expr> is a regular expression\n"
-                    // Leave --head undocumented as alias for -m
-                    "  -m <count>, --max-count=<count>\n"
-                    "                  Quit after printing <count> lines. This is meant to be\n"
-                    "                  paired with --regex, but will work on its own.\n"
-                    "  --print         Paired with --regex and --max-count to let content bypass\n"
-                    "                  regex filter but still stop at number of matches.\n"
-                    // Leave --tail undocumented as alias for -t
-                    "  -t <count>      Print only the most recent <count> lines (implies -d)\n"
-                    "  -t '<time>'     Print most recent lines since specified time (implies -d)\n"
-                    "  -T <count>      Print only the most recent <count> lines (does not imply -d)\n"
-                    "  -T '<time>'     Print most recent lines since specified time (not imply -d)\n"
-                    "                  count is pure numerical, time is 'MM-DD hh:mm:ss.mmm...'\n"
-                    "                  'YYYY-MM-DD hh:mm:ss.mmm...' or 'sssss.mmm...' format\n"
-                    "  -g, --buffer-size                      Get the size of the ring buffer.\n"
-                    "  -G <size>, --buffer-size=<size>\n"
-                    "                  Set size of log ring buffer, may suffix with K or M.\n"
-                    "  -L, --last      Dump logs from prior to last reboot\n"
-                    "  -b <buffer>, --buffer=<buffer>         Request alternate ring buffer, 'main',\n"
-                    "                  'system', 'radio', 'events', 'crash', 'default' or 'all'.\n"
-                    "                  Additionally, 'kernel' for userdebug and eng builds, and\n"
-                    "                  'security' for Device Owner installations.\n"
-                    "                  Multiple -b parameters or comma separated list of buffers are\n"
-                    "                  allowed. Buffers interleaved.\n"
-                    "                  Default -b main,system,crash,kernel.\n"
-                    "  -B, --binary    Output the log in binary.\n"
-                    "  -S, --statistics                       Output statistics.\n"
-                    "  -p, --prune     Print prune white and ~black list. Service is specified as\n"
-                    "                  UID, UID/PID or /PID. Weighed for quicker pruning if prefix\n"
-                    "                  with ~, otherwise weighed for longevity if unadorned. All\n"
-                    "                  other pruning activity is oldest first. Special case ~!\n"
-                    "                  represents an automatic quicker pruning for the noisiest\n"
-                    "                  UID as determined by the current statistics.\n"
-                    "  -P '<list> ...', --prune='<list> ...'\n"
-                    "                  Set prune white and ~black list, using same format as\n"
-                    "                  listed above. Must be quoted.\n"
-                    "  --pid=<pid>     Only prints logs from the given pid.\n"
-                    // Check ANDROID_LOG_WRAP_DEFAULT_TIMEOUT value for match to 2 hours
-                    "  --wrap          Sleep for 2 hours or when buffer about to wrap whichever\n"
-                    "                  comes first. Improves efficiency of polling by providing\n"
-                    "                  an about-to-wrap wakeup.\n");
+Formatting:
+  -v, --format=<format>       Sets log print format verb and adverbs, where <format> is one of:
+                                brief help long process raw tag thread threadtime time
+                              Modifying adverbs can be added:
+                                color descriptive epoch monotonic printable uid usec UTC year zone
+                              Multiple -v parameters or comma separated list of format and format
+                              modifiers are allowed.
+  -D, --dividers              Print dividers between each log buffer.
+  -B, --binary                Output the log in binary.
 
-    fprintf(context->error, "\nfilterspecs are a series of \n"
+Outfile files:
+  -f, --file=<file>           Log to file instead of stdout.
+  -r, --rotate-kbytes=<n>     Rotate log every <n> kbytes. Requires -f option.
+  -n, --rotate-count=<count>  Sets max number of rotated logs to <count>, default 4.
+  --id=<id>                   If the signature <id> for logging to file changes, then clear the
+                              associated files and continue.
+
+Logd control:
+ These options send a control message to the logd daemon on device, print its return message if
+ applicable, then exit. They are incompatible with -L, as these attributes do not apply to pstore.
+  -g, --buffer-size           Get the size of the ring buffers within logd.
+  -G, --buffer-size=<size>    Set size of a ring buffer in logd. May suffix with K or M.
+                              This can individually control each buffer's size with -b.
+  -S, --statistics            Output statistics.
+                              --pid can be used to provide pid specific stats.
+  -p, --prune                 Print prune white and ~black list. Service is specified as UID,
+                              UID/PID or /PID. Weighed for quicker pruning if prefix with ~,
+                              otherwise weighed for longevity if unadorned. All other pruning
+                              activity is oldest first. Special case ~! represents an automatic
+                              quicker pruning for the noisiest UID as determined by the current
+                              statistics.
+  -P, --prune='<list> ...'    Set prune white and ~black list, using same format as listed above.
+                              Must be quoted.
+
+Filtering:
+  -s                          Set default filter to silent. Equivalent to filterspec '*:S'
+  -e, --regex=<expr>          Only print lines where the log message matches <expr> where <expr> is
+                              an ECMAScript regular expression.
+  -m, --max-count=<count>     Quit after printing <count> lines. This is meant to be paired with
+                              --regex, but will work on its own.
+  --print                     This option is only applicable when --regex is set and only useful if
+                              --max-count is also provided.
+                              With --print, logcat will print all messages even if they do not
+                              match the regex. Logcat will quit after printing the max-count number
+                              of lines that match the regex.
+  -t <count>                  Print only the most recent <count> lines (implies -d).
+  -t '<time>'                 Print the lines since specified time (implies -d).
+  -T <count>                  Print only the most recent <count> lines (does not imply -d).
+  -T '<time>'                 Print the lines since specified time (not imply -d).
+                              count is pure numerical, time is 'MM-DD hh:mm:ss.mmm...'
+                              'YYYY-MM-DD hh:mm:ss.mmm...' or 'sssss.mmm...' format.
+)init");
+
+    fprintf(stderr, "\nfilterspecs are a series of \n"
                    "  <tag>[:priority]\n\n"
                    "where <tag> is a log component tag (or * for all) and priority is:\n"
                    "  V    Verbose (default for <tag>)\n"
@@ -517,9 +363,8 @@
                    "or defaults to \"threadtime\"\n\n");
 }
 
-static void show_format_help(android_logcat_context_internal* context) {
-    if (!context->error) return;
-    fprintf(context->error,
+static void show_format_help() {
+    fprintf(stderr,
         "-v <format>, --format=<format> options:\n"
         "  Sets log print format verb and adverbs, where <format> is:\n"
         "    brief long process raw tag thread threadtime time\n"
@@ -553,16 +398,13 @@
 }
 // clang-format on
 
-static int setLogFormat(android_logcat_context_internal* context,
-                        const char* formatString) {
-    AndroidLogPrintFormat format;
-
-    format = android_log_formatFromString(formatString);
+int Logcat::SetLogFormat(const char* format_string) {
+    AndroidLogPrintFormat format = android_log_formatFromString(format_string);
 
     // invalid string?
     if (format == FORMAT_OFF) return -1;
 
-    return android_log_setPrintFormat(context->logformat, format);
+    return android_log_setPrintFormat(logformat_.get(), format);
 }
 
 static std::pair<unsigned long, const char*> format_of_size(unsigned long value) {
@@ -575,51 +417,6 @@
     return std::make_pair(value, multipliers[i]);
 }
 
-// String to unsigned int, returns -1 if it fails
-static bool getSizeTArg(const char* ptr, size_t* val, size_t min = 0,
-                        size_t max = SIZE_MAX) {
-    if (!ptr) return false;
-
-    char* endp;
-    errno = 0;
-    size_t ret = (size_t)strtoll(ptr, &endp, 0);
-
-    if (endp[0] || errno) return false;
-
-    if ((ret > max) || (ret < min)) return false;
-
-    *val = ret;
-    return true;
-}
-
-static void logcat_panic(android_logcat_context_internal* context,
-                         enum helpType showHelp, const char* fmt, ...) {
-    context->retval = EXIT_FAILURE;
-    if (!context->error) {
-        context->stop = true;
-        return;
-    }
-
-    va_list args;
-    va_start(args, fmt);
-    vfprintf(context->error, fmt, args);
-    va_end(args);
-
-    switch (showHelp) {
-        case HELP_TRUE:
-            show_help(context);
-            break;
-        case HELP_FORMAT:
-            show_format_help(context);
-            break;
-        case HELP_FALSE:
-        default:
-            break;
-    }
-
-    context->stop = true;
-}
-
 static char* parseTime(log_time& t, const char* cp) {
     char* ep = t.strptime(cp, "%m-%d %H:%M:%S.%q");
     if (ep) return ep;
@@ -697,32 +494,18 @@
     return retval;
 }
 
-const char* getenv(android_logcat_context_internal* context, const char* name) {
-    if (!context->envp || !name || !*name) return nullptr;
-
-    for (size_t len = strlen(name), i = 0; context->envp[i]; ++i) {
-        if (strncmp(context->envp[i], name, len)) continue;
-        if (context->envp[i][len] == '=') return &context->envp[i][len + 1];
-    }
-    return nullptr;
-}
-
-}  // namespace android
-
-void reportErrorName(const char** current, const char* name,
-                     bool blockSecurity) {
-    if (*current) return;
-    if (!blockSecurity || (android_name_to_log_id(name) != LOG_ID_SECURITY)) {
-        *current = name;
+void ReportErrorName(const std::string& name, bool allow_security,
+                     std::vector<std::string>* errors) {
+    if (allow_security || name != "security") {
+        errors->emplace_back(name);
     }
 }
 
-static int __logcat(android_logcat_context_internal* context) {
-    using namespace android;
-    int err;
+int Logcat::Run(int argc, char** argv) {
     bool hasSetLogFormat = false;
     bool clearLog = false;
-    bool allSelected = false;
+    bool security_buffer_selected =
+            false;  // Do not report errors on the security buffer unless it is explicitly named.
     bool getLogSize = false;
     bool getPruneList = false;
     bool printStatistics = false;
@@ -732,114 +515,15 @@
     const char* setId = nullptr;
     int mode = ANDROID_LOG_RDONLY;
     std::string forceFilters;
-    log_device_t* dev;
-    struct logger_list* logger_list;
     size_t tail_lines = 0;
     log_time tail_time(log_time::EPOCH);
     size_t pid = 0;
     bool got_t = false;
-
-    // object instantiations before goto's can happen
-    log_device_t unexpected("unexpected", false);
-    const char* openDeviceFail = nullptr;
-    const char* clearFail = nullptr;
-    const char* setSizeFail = nullptr;
-    const char* getSizeFail = nullptr;
-    int argc = context->argc;
-    char* const* argv = context->argv;
-
-    context->output = stdout;
-    context->error = stderr;
-
-    for (int i = 0; i < argc; ++i) {
-        // Simulate shell stderr redirect parsing
-        if ((argv[i][0] != '2') || (argv[i][1] != '>')) continue;
-
-        // Append to file not implemented, just open file
-        size_t skip = (argv[i][2] == '>') + 2;
-        if (!strcmp(&argv[i][skip], "/dev/null")) {
-            context->stderr_null = true;
-        } else if (!strcmp(&argv[i][skip], "&1")) {
-            context->stderr_stdout = true;
-        } else {
-            // stderr file redirections are not supported
-            fprintf(context->stderr_stdout ? stdout : stderr,
-                    "stderr redirection to file %s unsupported, skipping\n",
-                    &argv[i][skip]);
-        }
-        // Only the first one
-        break;
-    }
-
-    const char* filename = nullptr;
-    for (int i = 0; i < argc; ++i) {
-        // Simulate shell stdout redirect parsing
-        if (argv[i][0] != '>') continue;
-
-        // Append to file not implemented, just open file
-        filename = &argv[i][(argv[i][1] == '>') + 1];
-        // Only the first one
-        break;
-    }
-
-    // Deal with setting up file descriptors and FILE pointers
-    if (context->error_fd >= 0) {  // Is an error file descriptor supplied?
-        if (context->error_fd == context->output_fd) {
-            context->stderr_stdout = true;
-        } else if (context->stderr_null) {  // redirection told us to close it
-            close(context->error_fd);
-            context->error_fd = -1;
-        } else {  // All Ok, convert error to a FILE pointer
-            context->error = fdopen(context->error_fd, "web");
-            if (!context->error) {
-                context->retval = -errno;
-                fprintf(context->stderr_stdout ? stdout : stderr,
-                        "Failed to fdopen(error_fd=%d) %s\n", context->error_fd,
-                        strerror(errno));
-                goto exit;
-            }
-        }
-    }
-    if (context->output_fd >= 0) {  // Is an output file descriptor supplied?
-        if (filename) {  // redirect to file, close supplied file descriptor.
-            close(context->output_fd);
-            context->output_fd = -1;
-        } else {  // All Ok, convert output to a FILE pointer
-            context->output = fdopen(context->output_fd, "web");
-            if (!context->output) {
-                context->retval = -errno;
-                fprintf(context->stderr_stdout ? stdout : context->error,
-                        "Failed to fdopen(output_fd=%d) %s\n",
-                        context->output_fd, strerror(errno));
-                goto exit;
-            }
-        }
-    }
-    if (filename) {  // We supplied an output file redirected in command line
-        context->output = fopen(filename, "web");
-    }
-    // Deal with 2>&1
-    if (context->stderr_stdout) context->error = context->output;
-    // Deal with 2>/dev/null
-    if (context->stderr_null) {
-        context->error_fd = -1;
-        context->error = nullptr;
-    }
-    // Only happens if output=stdout or output=filename
-    if ((context->output_fd < 0) && context->output) {
-        context->output_fd = fileno(context->output);
-    }
-    // Only happens if error=stdout || error=stderr
-    if ((context->error_fd < 0) && context->error) {
-        context->error_fd = fileno(context->error);
-    }
-
-    context->logformat = android_log_format_new();
+    unsigned id_mask = 0;
 
     if (argc == 2 && !strcmp(argv[1], "--help")) {
-        show_help(context);
-        context->retval = EXIT_SUCCESS;
-        goto exit;
+        show_help();
+        return EXIT_SUCCESS;
     }
 
     // meant to catch comma-delimited values, but cast a wider
@@ -897,15 +581,12 @@
                 // only long options
                 if (long_options[option_index].name == pid_str) {
                     if (pid != 0) {
-                        logcat_panic(context, HELP_TRUE, "Only supports one PID argument.\n");
-                        goto exit;
+                        error(EXIT_FAILURE, 0, "Only one --pid argument can be provided.");
                     }
 
-                    // ToDo: determine runtime PID_MAX?
-                    if (!getSizeTArg(optarg, &pid, 1)) {
-                        logcat_panic(context, HELP_TRUE, "%s %s out of range\n",
-                                     long_options[option_index].name, optarg);
-                        goto exit;
+                    if (!ParseUint(optarg, &pid) || pid < 1) {
+                        error(EXIT_FAILURE, 0, "%s %s out of range.",
+                              long_options[option_index].name, optarg);
                     }
                     break;
                 }
@@ -914,26 +595,23 @@
                             ANDROID_LOG_NONBLOCK;
                     // ToDo: implement API that supports setting a wrap timeout
                     size_t dummy = ANDROID_LOG_WRAP_DEFAULT_TIMEOUT;
-                    if (optarg && !getSizeTArg(optarg, &dummy, 1)) {
-                        logcat_panic(context, HELP_TRUE, "%s %s out of range\n",
-                                     long_options[option_index].name, optarg);
-                        goto exit;
+                    if (optarg && (!ParseUint(optarg, &dummy) || dummy < 1)) {
+                        error(EXIT_FAILURE, 0, "%s %s out of range.",
+                              long_options[option_index].name, optarg);
                     }
-                    if ((dummy != ANDROID_LOG_WRAP_DEFAULT_TIMEOUT) &&
-                        context->error) {
-                        fprintf(context->error,
-                                "WARNING: %s %u seconds, ignoring %zu\n",
-                                long_options[option_index].name,
-                                ANDROID_LOG_WRAP_DEFAULT_TIMEOUT, dummy);
+                    if (dummy != ANDROID_LOG_WRAP_DEFAULT_TIMEOUT) {
+                        fprintf(stderr, "WARNING: %s %u seconds, ignoring %zu\n",
+                                long_options[option_index].name, ANDROID_LOG_WRAP_DEFAULT_TIMEOUT,
+                                dummy);
                     }
                     break;
                 }
                 if (long_options[option_index].name == print_str) {
-                    context->printItAnyways = true;
+                    print_it_anyways_ = true;
                     break;
                 }
                 if (long_options[option_index].name == debug_str) {
-                    context->debug = true;
+                    debug_ = true;
                     break;
                 }
                 if (long_options[option_index].name == id_str) {
@@ -943,7 +621,7 @@
 
             case 's':
                 // default to all silent
-                android_log_addFilterRule(context->logformat, "*:s");
+                android_log_addFilterRule(logformat_.get(), "*:s");
                 break;
 
             case 'c':
@@ -968,25 +646,18 @@
                 if (strspn(optarg, "0123456789") != strlen(optarg)) {
                     char* cp = parseTime(tail_time, optarg);
                     if (!cp) {
-                        logcat_panic(context, HELP_FALSE, "-%c \"%s\" not in time format\n", c,
-                                     optarg);
-                        goto exit;
+                        error(EXIT_FAILURE, 0, "-%c '%s' not in time format.", c, optarg);
                     }
                     if (*cp) {
                         char ch = *cp;
                         *cp = '\0';
-                        if (context->error) {
-                            fprintf(context->error, "WARNING: -%c \"%s\"\"%c%s\" time truncated\n",
-                                    c, optarg, ch, cp + 1);
-                        }
+                        fprintf(stderr, "WARNING: -%c '%s' '%c%s' time truncated\n", c, optarg, ch,
+                                cp + 1);
                         *cp = ch;
                     }
                 } else {
-                    if (!getSizeTArg(optarg, &tail_lines, 1)) {
-                        if (context->error) {
-                            fprintf(context->error, "WARNING: -%c %s invalid, setting to 1\n", c,
-                                    optarg);
-                        }
+                    if (!ParseUint(optarg, &tail_lines) || tail_lines < 1) {
+                        fprintf(stderr, "WARNING: -%c %s invalid, setting to 1\n", c, optarg);
                         tail_lines = 1;
                     }
                 }
@@ -997,14 +668,13 @@
                 break;
 
             case 'e':
-                context->regex.reset(new std::regex(optarg));
+                regex_.reset(new std::regex(optarg));
                 break;
 
             case 'm': {
-                if (!getSizeTArg(optarg, &context->maxCount)) {
-                    logcat_panic(context, HELP_FALSE,
-                                 "-%c \"%s\" isn't an integer greater than zero\n", c, optarg);
-                    goto exit;
+                if (!ParseUint(optarg, &max_count_) || max_count_ < 1) {
+                    error(EXIT_FAILURE, 0, "-%c '%s' isn't an integer greater than zero.", c,
+                          optarg);
                 }
             } break;
 
@@ -1016,37 +686,8 @@
                 FALLTHROUGH_INTENDED;
 
             case 'G': {
-                char* cp;
-                if (strtoll(optarg, &cp, 0) > 0) {
-                    setLogSize = strtoll(optarg, &cp, 0);
-                } else {
-                    setLogSize = 0;
-                }
-
-                switch (*cp) {
-                    case 'g':
-                    case 'G':
-                        setLogSize *= 1024;
-                        FALLTHROUGH_INTENDED;
-                    case 'm':
-                    case 'M':
-                        setLogSize *= 1024;
-                        FALLTHROUGH_INTENDED;
-                    case 'k':
-                    case 'K':
-                        setLogSize *= 1024;
-                        FALLTHROUGH_INTENDED;
-                    case '\0':
-                        break;
-
-                    default:
-                        setLogSize = 0;
-                }
-
-                if (!setLogSize) {
-                    logcat_panic(context, HELP_FALSE,
-                                 "ERROR: -G <num><multiplier>\n");
-                    goto exit;
+                if (!ParseByteCount(optarg, &setLogSize) || setLogSize < 1) {
+                    error(EXIT_FAILURE, 0, "-G must be specified as <num><multiplier>.");
                 }
             } break;
 
@@ -1061,67 +702,28 @@
                 setPruneList = optarg;
                 break;
 
-            case 'b': {
-                std::unique_ptr<char, void (*)(void*)> buffers(strdup(optarg), free);
-                char* arg = buffers.get();
-                unsigned idMask = 0;
-                char* sv = nullptr;  // protect against -ENOMEM above
-                while (!!(arg = strtok_r(arg, delimiters, &sv))) {
-                    if (!strcmp(arg, "default")) {
-                        idMask |= (1 << LOG_ID_MAIN) | (1 << LOG_ID_SYSTEM) |
-                                  (1 << LOG_ID_CRASH);
-                    } else if (!strcmp(arg, "all")) {
-                        allSelected = true;
-                        idMask = (unsigned)-1;
+            case 'b':
+                for (const auto& buffer : Split(optarg, delimiters)) {
+                    if (buffer == "default") {
+                        id_mask |= (1 << LOG_ID_MAIN) | (1 << LOG_ID_SYSTEM) | (1 << LOG_ID_CRASH);
+                    } else if (buffer == "all") {
+                        id_mask = -1;
                     } else {
-                        log_id_t log_id = android_name_to_log_id(arg);
-                        const char* name = android_log_id_to_name(log_id);
-
-                        if (!!strcmp(name, arg)) {
-                            logcat_panic(context, HELP_TRUE,
-                                         "unknown buffer %s\n", arg);
-                            goto exit;
+                        log_id_t log_id = android_name_to_log_id(buffer.c_str());
+                        if (log_id >= LOG_ID_MAX) {
+                            error(EXIT_FAILURE, 0, "Unknown buffer '%s' listed for -b.",
+                                  buffer.c_str());
                         }
-                        if (log_id == LOG_ID_SECURITY) allSelected = false;
-                        idMask |= (1 << log_id);
-                    }
-                    arg = nullptr;
-                }
-
-                for (int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
-                    const char* name = android_log_id_to_name((log_id_t)i);
-                    log_id_t log_id = android_name_to_log_id(name);
-
-                    if (log_id != (log_id_t)i) continue;
-                    if (!(idMask & (1 << i))) continue;
-
-                    bool found = false;
-                    for (dev = context->devices; dev; dev = dev->next) {
-                        if (!strcmp(name, dev->device)) {
-                            found = true;
-                            break;
+                        if (log_id == LOG_ID_SECURITY) {
+                            security_buffer_selected = true;
                         }
-                        if (!dev->next) break;
+                        id_mask |= (1 << log_id);
                     }
-                    if (found) continue;
-
-                    bool binary = !strcmp(name, "events") ||
-                                  !strcmp(name, "security") ||
-                                  !strcmp(name, "stats");
-                    log_device_t* d = new log_device_t(name, binary);
-
-                    if (dev) {
-                        dev->next = d;
-                        dev = d;
-                    } else {
-                        context->devices = dev = d;
-                    }
-                    context->devCount++;
                 }
-            } break;
+                break;
 
             case 'B':
-                context->printBinary = 1;
+                print_binary_ = 1;
                 break;
 
             case 'f':
@@ -1129,43 +731,34 @@
                     tail_time = lastLogTime(optarg);
                 }
                 // redirect output to a file
-                context->outputFileName = optarg;
+                output_file_name_ = optarg;
                 break;
 
             case 'r':
-                if (!getSizeTArg(optarg, &context->logRotateSizeKBytes, 1)) {
-                    logcat_panic(context, HELP_TRUE, "Invalid parameter \"%s\" to -r\n", optarg);
-                    goto exit;
+                if (!ParseUint(optarg, &log_rotate_size_kb_) || log_rotate_size_kb_ < 1) {
+                    error(EXIT_FAILURE, 0, "Invalid parameter '%s' to -r.", optarg);
                 }
                 break;
 
             case 'n':
-                if (!getSizeTArg(optarg, &context->maxRotatedLogs, 1)) {
-                    logcat_panic(context, HELP_TRUE, "Invalid parameter \"%s\" to -n\n", optarg);
-                    goto exit;
+                if (!ParseUint(optarg, &max_rotated_logs_) || max_rotated_logs_ < 1) {
+                    error(EXIT_FAILURE, 0, "Invalid parameter '%s' to -n.", optarg);
                 }
                 break;
 
-            case 'v': {
+            case 'v':
                 if (!strcmp(optarg, "help") || !strcmp(optarg, "--help")) {
-                    show_format_help(context);
-                    context->retval = EXIT_SUCCESS;
-                    goto exit;
+                    show_format_help();
+                    return EXIT_SUCCESS;
                 }
-                std::unique_ptr<char, void (*)(void*)> formats(strdup(optarg), free);
-                char* arg = formats.get();
-                char* sv = nullptr;  // protect against -ENOMEM above
-                while (!!(arg = strtok_r(arg, delimiters, &sv))) {
-                    err = setLogFormat(context, arg);
+                for (const auto& arg : Split(optarg, delimiters)) {
+                    int err = SetLogFormat(arg.c_str());
                     if (err < 0) {
-                        logcat_panic(context, HELP_FORMAT,
-                                     "Invalid parameter \"%s\" to -v\n", arg);
-                        goto exit;
+                        error(EXIT_FAILURE, 0, "Invalid parameter '%s' to -v.", arg.c_str());
                     }
-                    arg = nullptr;
                     if (err) hasSetLogFormat = true;
                 }
-            } break;
+                break;
 
             case 'Q':
 #define LOGCAT_FILTER "androidboot.logcat="
@@ -1183,8 +776,7 @@
                 {
                     // if not in emulator, exit quietly
                     if (false == android::base::GetBoolProperty(QEMU_PROPERTY, false)) {
-                        context->retval = EXIT_SUCCESS;
-                        goto exit;
+                        return EXIT_SUCCESS;
                     }
 
                     std::string cmdline = android::base::GetProperty(QEMU_CMDLINE, "");
@@ -1195,8 +787,7 @@
                     const char* logcatFilter = strstr(cmdline.c_str(), LOGCAT_FILTER);
                     // if nothing found or invalid filters, exit quietly
                     if (!logcatFilter) {
-                        context->retval = EXIT_SUCCESS;
-                        goto exit;
+                        return EXIT_SUCCESS;
                     }
 
                     const char* p = logcatFilter + strlen(LOGCAT_FILTER);
@@ -1215,8 +806,7 @@
                     } else if (console) {
                         p = console + strlen(CONSOLE_OPTION);
                     } else {
-                        context->retval = EXIT_FAILURE;
-                        goto exit;
+                        return EXIT_FAILURE;
                     }
 
                     q = strpbrk(p, " \t\n\r");
@@ -1233,37 +823,26 @@
                             devname = devname.substr(0, pos);
                         }
                     }
-                    cmdline.erase();
 
-                    if (context->error) {
-                        fprintf(context->error, "logcat using %s\n",
-                                devname.c_str());
+                    fprintf(stderr, "logcat using %s\n", devname.c_str());
+
+                    int fd = open(devname.c_str(), O_WRONLY | O_CLOEXEC);
+                    if (fd < 0) {
+                        break;
                     }
 
-                    FILE* fp = fopen(devname.c_str(), "web");
-                    devname.erase();
-                    if (!fp) break;
-
                     if (consolePipe) {
                         // need the trailing '\0'
-                        if(!android::base::WriteFully(fileno(fp), pipePurpose.c_str(),
-                                    pipePurpose.size() + 1)) {
-                            fclose(fp);
-                            context->retval = EXIT_FAILURE;
-                            goto exit;
+                        if (!android::base::WriteFully(fd, pipePurpose.c_str(),
+                                                       pipePurpose.size() + 1)) {
+                            close(fd);
+                            return EXIT_FAILURE;
                         }
                     }
-
                     // close output and error channels, replace with console
-                    android::close_output(context);
-                    android::close_error(context);
-                    context->stderr_stdout = true;
-                    context->output = fp;
-                    context->output_fd = fileno(fp);
-                    if (context->stderr_null) break;
-                    context->stderr_stdout = true;
-                    context->error = fp;
-                    context->error_fd = fileno(fp);
+                    dup2(fd, output_fd_.get());
+                    dup2(fd, STDERR_FILENO);
+                    close(fd);
                 }
                 break;
 
@@ -1272,69 +851,53 @@
                 break;
 
             case ':':
-                logcat_panic(context, HELP_TRUE, "Option -%c needs an argument\n", optopt);
-                goto exit;
+                error(EXIT_FAILURE, 0, "Option '%s' needs an argument.", argv[optind - 1]);
+                break;
 
             case 'h':
-                show_help(context);
-                show_format_help(context);
-                goto exit;
+                show_help();
+                show_format_help();
+                return EXIT_SUCCESS;
+
+            case '?':
+                error(EXIT_FAILURE, 0, "Unknown option '%s'.", argv[optind - 1]);
+                break;
 
             default:
-                logcat_panic(context, HELP_TRUE, "Unrecognized Option %c\n", optopt);
-                goto exit;
+                error(EXIT_FAILURE, 0, "Unknown getopt_long() result '%c'.", c);
         }
     }
 
-    if (context->maxCount && got_t) {
-        logcat_panic(context, HELP_TRUE,
-                     "Cannot use -m (--max-count) and -t together\n");
-        goto exit;
+    if (max_count_ && got_t) {
+        error(EXIT_FAILURE, 0, "Cannot use -m (--max-count) and -t together.");
     }
-    if (context->printItAnyways && (!context->regex || !context->maxCount)) {
+    if (print_it_anyways_ && (!regex_ || !max_count_)) {
         // One day it would be nice if --print -v color and --regex <expr>
         // could play with each other and show regex highlighted content.
-        // clang-format off
-        if (context->error) {
-            fprintf(context->error, "WARNING: "
-                            "--print ignored, to be used in combination with\n"
-                                "         "
-                            "--regex <expr> and --max-count <N>\n");
-        }
-        context->printItAnyways = false;
+        fprintf(stderr,
+                "WARNING: "
+                "--print ignored, to be used in combination with\n"
+                "         "
+                "--regex <expr> and --max-count <N>\n");
+        print_it_anyways_ = false;
     }
 
-    if (!context->devices) {
-        dev = context->devices = new log_device_t("main", false);
-        context->devCount = 1;
-        if (android_name_to_log_id("system") == LOG_ID_SYSTEM) {
-            dev = dev->next = new log_device_t("system", false);
-            context->devCount++;
-        }
-        if (android_name_to_log_id("crash") == LOG_ID_CRASH) {
-            dev = dev->next = new log_device_t("crash", false);
-            context->devCount++;
-        }
-        if (android_name_to_log_id("kernel") == LOG_ID_KERNEL) {
-            dev = dev->next = new log_device_t("kernel", false);
-            context->devCount++;
-        }
+    // If no buffers are specified, default to using these buffers.
+    if (id_mask == 0) {
+        id_mask = (1 << LOG_ID_MAIN) | (1 << LOG_ID_SYSTEM) | (1 << LOG_ID_CRASH) |
+                  (1 << LOG_ID_KERNEL);
     }
 
-    if (!!context->logRotateSizeKBytes && !context->outputFileName) {
-        logcat_panic(context, HELP_TRUE, "-r requires -f as well\n");
-        goto exit;
+    if (log_rotate_size_kb_ != 0 && !output_file_name_) {
+        error(EXIT_FAILURE, 0, "-r requires -f as well.");
     }
 
-    if (!!setId) {
-        if (!context->outputFileName) {
-            logcat_panic(context, HELP_TRUE,
-                         "--id='%s' requires -f as well\n", setId);
-            goto exit;
+    if (setId != 0) {
+        if (!output_file_name_) {
+            error(EXIT_FAILURE, 0, "--id='%s' requires -f as well.", setId);
         }
 
-        std::string file_name = android::base::StringPrintf(
-                                        "%s.id", context->outputFileName);
+        std::string file_name = StringPrintf("%s.id", output_file_name_);
         std::string file;
         bool file_ok = android::base::ReadFileToString(file_name, &file);
         android::base::WriteStringToFile(setId, file_name, S_IRUSR | S_IWUSR,
@@ -1343,397 +906,264 @@
     }
 
     if (!hasSetLogFormat) {
-        const char* logFormat = android::getenv(context, "ANDROID_PRINTF_LOG");
+        const char* logFormat = getenv("ANDROID_PRINTF_LOG");
 
         if (!!logFormat) {
-            std::unique_ptr<char, void (*)(void*)> formats(strdup(logFormat),
-                                                           free);
-            char* sv = nullptr;  // protect against -ENOMEM above
-            char* arg = formats.get();
-            while (!!(arg = strtok_r(arg, delimiters, &sv))) {
-                err = setLogFormat(context, arg);
+            for (const auto& arg : Split(logFormat, delimiters)) {
+                int err = SetLogFormat(arg.c_str());
                 // environment should not cause crash of logcat
-                if ((err < 0) && context->error) {
-                    fprintf(context->error,
-                            "invalid format in ANDROID_PRINTF_LOG '%s'\n", arg);
+                if (err < 0) {
+                    fprintf(stderr, "invalid format in ANDROID_PRINTF_LOG '%s'\n", arg.c_str());
                 }
-                arg = nullptr;
                 if (err > 0) hasSetLogFormat = true;
             }
         }
         if (!hasSetLogFormat) {
-            setLogFormat(context, "threadtime");
+            SetLogFormat("threadtime");
         }
     }
 
     if (forceFilters.size()) {
-        err = android_log_addFilterString(context->logformat,
-                                          forceFilters.c_str());
+        int err = android_log_addFilterString(logformat_.get(), forceFilters.c_str());
         if (err < 0) {
-            logcat_panic(context, HELP_FALSE,
-                         "Invalid filter expression in logcat args\n");
-            goto exit;
+            error(EXIT_FAILURE, 0, "Invalid filter expression in logcat args.");
         }
     } else if (argc == optind) {
         // Add from environment variable
-        const char* env_tags_orig = android::getenv(context, "ANDROID_LOG_TAGS");
+        const char* env_tags_orig = getenv("ANDROID_LOG_TAGS");
 
         if (!!env_tags_orig) {
-            err = android_log_addFilterString(context->logformat,
-                                              env_tags_orig);
+            int err = android_log_addFilterString(logformat_.get(), env_tags_orig);
 
             if (err < 0) {
-                logcat_panic(context, HELP_TRUE,
-                            "Invalid filter expression in ANDROID_LOG_TAGS\n");
-                goto exit;
+                error(EXIT_FAILURE, 0, "Invalid filter expression in ANDROID_LOG_TAGS.");
             }
         }
     } else {
         // Add from commandline
         for (int i = optind ; i < argc ; i++) {
-            // skip stderr redirections of _all_ kinds
-            if ((argv[i][0] == '2') && (argv[i][1] == '>')) continue;
-            // skip stdout redirections of _all_ kinds
-            if (argv[i][0] == '>') continue;
-
-            err = android_log_addFilterString(context->logformat, argv[i]);
+            int err = android_log_addFilterString(logformat_.get(), argv[i]);
             if (err < 0) {
-                logcat_panic(context, HELP_TRUE,
-                             "Invalid filter expression '%s'\n", argv[i]);
-                goto exit;
+                error(EXIT_FAILURE, 0, "Invalid filter expression '%s'.", argv[i]);
             }
         }
     }
 
-    dev = context->devices;
-    if (tail_time != log_time::EPOCH) {
-        logger_list = android_logger_list_alloc_time(mode, tail_time, pid);
-    } else {
-        logger_list = android_logger_list_alloc(mode, tail_lines, pid);
+    if (mode & ANDROID_LOG_PSTORE) {
+        if (output_file_name_) {
+            error(EXIT_FAILURE, 0, "-c is ambiguous with both -f and -L specified.");
+        }
+        if (setLogSize || getLogSize || printStatistics || getPruneList || setPruneList) {
+            error(EXIT_FAILURE, 0, "-L is incompatible with -g/-G, -S, and -p/-P.");
+        }
+        if (clearLog) {
+            unlink("/sys/fs/pstore/pmsg-ramoops-0");
+            return EXIT_SUCCESS;
+        }
     }
-    // We have three orthogonal actions below to clear, set log size and
-    // get log size. All sharing the same iteration loop.
-    while (dev) {
-        dev->logger_list = logger_list;
-        dev->logger = android_logger_open(logger_list,
-                                          android_name_to_log_id(dev->device));
-        if (!dev->logger) {
-            reportErrorName(&openDeviceFail, dev->device, allSelected);
-            dev = dev->next;
-            continue;
+
+    if (output_file_name_) {
+        if (setLogSize || getLogSize || printStatistics || getPruneList || setPruneList) {
+            error(EXIT_FAILURE, 0, "-f is incompatible with -g/-G, -S, and -p/-P.");
         }
 
         if (clearLog || setId) {
-            if (context->outputFileName) {
-                int maxRotationCountDigits =
-                    (context->maxRotatedLogs > 0) ?
-                        (int)(floor(log10(context->maxRotatedLogs) + 1)) :
-                        0;
+            int max_rotation_count_digits =
+                    max_rotated_logs_ > 0 ? (int)(floor(log10(max_rotated_logs_) + 1)) : 0;
 
-                for (int i = context->maxRotatedLogs ; i >= 0 ; --i) {
-                    std::string file;
+            for (int i = max_rotated_logs_; i >= 0; --i) {
+                std::string file;
 
-                    if (!i) {
-                        file = android::base::StringPrintf(
-                            "%s", context->outputFileName);
-                    } else {
-                        file = android::base::StringPrintf("%s.%.*d",
-                            context->outputFileName, maxRotationCountDigits, i);
-                    }
-
-                    if (!file.length()) {
-                        perror("while clearing log files");
-                        reportErrorName(&clearFail, dev->device, allSelected);
-                        break;
-                    }
-
-                    err = unlink(file.c_str());
-
-                    if (err < 0 && errno != ENOENT && !clearFail) {
-                        perror("while clearing log files");
-                        reportErrorName(&clearFail, dev->device, allSelected);
-                    }
+                if (!i) {
+                    file = output_file_name_;
+                } else {
+                    file = StringPrintf("%s.%.*d", output_file_name_, max_rotation_count_digits, i);
                 }
-            } else if (android_logger_clear(dev->logger)) {
-                reportErrorName(&clearFail, dev->device, allSelected);
+
+                int err = unlink(file.c_str());
+
+                if (err < 0 && errno != ENOENT) {
+                    fprintf(stderr, "failed to delete log file '%s': %s\n", file.c_str(),
+                            strerror(errno));
+                }
+            }
+        }
+
+        if (clearLog) {
+            return EXIT_SUCCESS;
+        }
+    }
+
+    std::unique_ptr<logger_list, decltype(&android_logger_list_free)> logger_list{
+            nullptr, &android_logger_list_free};
+    if (tail_time != log_time::EPOCH) {
+        logger_list.reset(android_logger_list_alloc_time(mode, tail_time, pid));
+    } else {
+        logger_list.reset(android_logger_list_alloc(mode, tail_lines, pid));
+    }
+    // We have three orthogonal actions below to clear, set log size and
+    // get log size. All sharing the same iteration loop.
+    std::vector<std::string> open_device_failures;
+    std::vector<std::string> clear_failures;
+    std::vector<std::string> set_size_failures;
+    std::vector<std::string> get_size_failures;
+
+    for (int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
+        if (!(id_mask & (1 << i))) continue;
+        const char* buffer_name = android_log_id_to_name(static_cast<log_id_t>(i));
+
+        auto logger = android_logger_open(logger_list.get(), static_cast<log_id_t>(i));
+        if (logger == nullptr) {
+            ReportErrorName(buffer_name, security_buffer_selected, &open_device_failures);
+            continue;
+        }
+
+        if (clearLog) {
+            if (android_logger_clear(logger)) {
+                ReportErrorName(buffer_name, security_buffer_selected, &clear_failures);
             }
         }
 
         if (setLogSize) {
-            if (android_logger_set_log_size(dev->logger, setLogSize)) {
-                reportErrorName(&setSizeFail, dev->device, allSelected);
+            if (android_logger_set_log_size(logger, setLogSize)) {
+                ReportErrorName(buffer_name, security_buffer_selected, &set_size_failures);
             }
         }
 
         if (getLogSize) {
-            long size = android_logger_get_log_size(dev->logger);
-            long readable = android_logger_get_log_readable_size(dev->logger);
+            long size = android_logger_get_log_size(logger);
+            long readable = android_logger_get_log_readable_size(logger);
 
-            if ((size < 0) || (readable < 0)) {
-                reportErrorName(&getSizeFail, dev->device, allSelected);
+            if (size < 0 || readable < 0) {
+                ReportErrorName(buffer_name, security_buffer_selected, &get_size_failures);
             } else {
                 auto size_format = format_of_size(size);
                 auto readable_format = format_of_size(readable);
                 std::string str = android::base::StringPrintf(
-                       "%s: ring buffer is %lu %sB (%lu %sB consumed),"
-                         " max entry is %d B, max payload is %d B\n",
-                       dev->device,
-                       size_format.first, size_format.second,
-                       readable_format.first, readable_format.second,
-                       (int)LOGGER_ENTRY_MAX_LEN,
-                       (int)LOGGER_ENTRY_MAX_PAYLOAD);
-                TEMP_FAILURE_RETRY(write(context->output_fd,
-                                         str.data(), str.length()));
+                        "%s: ring buffer is %lu %sB (%lu %sB consumed),"
+                        " max entry is %d B, max payload is %d B\n",
+                        buffer_name, size_format.first, size_format.second, readable_format.first,
+                        readable_format.second, (int)LOGGER_ENTRY_MAX_LEN,
+                        (int)LOGGER_ENTRY_MAX_PAYLOAD);
+                TEMP_FAILURE_RETRY(write(output_fd_.get(), str.data(), str.length()));
             }
         }
-
-        dev = dev->next;
     }
 
-    context->retval = EXIT_SUCCESS;
-
     // report any errors in the above loop and exit
-    if (openDeviceFail) {
-        logcat_panic(context, HELP_FALSE,
-                     "Unable to open log device '%s'\n", openDeviceFail);
-        goto close;
+    if (!open_device_failures.empty()) {
+        error(EXIT_FAILURE, 0, "Unable to open log device%s '%s'.",
+              open_device_failures.size() > 1 ? "s" : "", Join(open_device_failures, ",").c_str());
     }
-    if (clearFail) {
-        logcat_panic(context, HELP_FALSE,
-                     "failed to clear the '%s' log\n", clearFail);
-        goto close;
+    if (!clear_failures.empty()) {
+        error(EXIT_FAILURE, 0, "failed to clear the '%s' log%s.", Join(clear_failures, ",").c_str(),
+              clear_failures.size() > 1 ? "s" : "");
     }
-    if (setSizeFail) {
-        logcat_panic(context, HELP_FALSE,
-                     "failed to set the '%s' log size\n", setSizeFail);
-        goto close;
+    if (!set_size_failures.empty()) {
+        error(EXIT_FAILURE, 0, "failed to set the '%s' log size%s.",
+              Join(set_size_failures, ",").c_str(), set_size_failures.size() > 1 ? "s" : "");
     }
-    if (getSizeFail) {
-        logcat_panic(context, HELP_FALSE,
-                     "failed to get the readable '%s' log size", getSizeFail);
-        goto close;
+    if (!get_size_failures.empty()) {
+        error(EXIT_FAILURE, 0, "failed to get the readable '%s' log size%s.",
+              Join(get_size_failures, ",").c_str(), get_size_failures.size() > 1 ? "s" : "");
     }
 
     if (setPruneList) {
         size_t len = strlen(setPruneList);
-        // extra 32 bytes are needed by android_logger_set_prune_list
-        size_t bLen = len + 32;
-        char* buf = nullptr;
-        if (asprintf(&buf, "%-*s", (int)(bLen - 1), setPruneList) > 0) {
-            buf[len] = '\0';
-            if (android_logger_set_prune_list(logger_list, buf, bLen)) {
-                logcat_panic(context, HELP_FALSE,
-                             "failed to set the prune list");
-            }
-            free(buf);
-        } else {
-            logcat_panic(context, HELP_FALSE,
-                         "failed to set the prune list (alloc)");
+        if (android_logger_set_prune_list(logger_list.get(), setPruneList, len)) {
+            error(EXIT_FAILURE, 0, "Failed to set the prune list.");
         }
-        goto close;
+        return EXIT_SUCCESS;
     }
 
     if (printStatistics || getPruneList) {
-        size_t len = 8192;
-        char* buf;
+        std::string buf(8192, '\0');
+        size_t ret_length = 0;
+        int retry = 32;
 
-        for (int retry = 32; (retry >= 0) && ((buf = new char[len]));
-             delete[] buf, buf = nullptr, --retry) {
+        for (; retry >= 0; --retry) {
             if (getPruneList) {
-                android_logger_get_prune_list(logger_list, buf, len);
+                android_logger_get_prune_list(logger_list.get(), buf.data(), buf.size());
             } else {
-                android_logger_get_statistics(logger_list, buf, len);
+                android_logger_get_statistics(logger_list.get(), buf.data(), buf.size());
             }
-            buf[len - 1] = '\0';
-            if (atol(buf) < 3) {
-                delete[] buf;
-                buf = nullptr;
+
+            ret_length = atol(buf.c_str());
+            if (ret_length < 3) {
+                error(EXIT_FAILURE, 0, "Failed to read data.");
+            }
+
+            if (ret_length < buf.size()) {
                 break;
             }
-            size_t ret = atol(buf) + 1;
-            if (ret <= len) {
-                len = ret;
-                break;
-            }
-            len = ret;
+
+            buf.resize(ret_length + 1);
         }
 
-        if (!buf) {
-            logcat_panic(context, HELP_FALSE, "failed to read data");
-            goto close;
+        if (retry < 0) {
+            error(EXIT_FAILURE, 0, "Failed to read data.");
         }
 
-        // remove trailing FF
-        char* cp = buf + len - 1;
-        *cp = '\0';
-        bool truncated = *--cp != '\f';
-        if (!truncated) *cp = '\0';
-
-        // squash out the byte count
-        cp = buf;
-        if (!truncated) {
-            while (isdigit(*cp)) ++cp;
-            if (*cp == '\n') ++cp;
+        buf.resize(ret_length);
+        if (buf.back() == '\f') {
+            buf.pop_back();
         }
 
-        len = strlen(cp);
-        TEMP_FAILURE_RETRY(write(context->output_fd, cp, len));
-        delete[] buf;
-        goto close;
+        // Remove the byte count prefix
+        const char* cp = buf.c_str();
+        while (isdigit(*cp)) ++cp;
+        if (*cp == '\n') ++cp;
+
+        size_t len = strlen(cp);
+        TEMP_FAILURE_RETRY(write(output_fd_.get(), cp, len));
+        return EXIT_SUCCESS;
     }
 
-    if (getLogSize || setLogSize || clearLog) goto close;
+    if (getLogSize || setLogSize || clearLog) return EXIT_SUCCESS;
 
-    setupOutputAndSchedulingPolicy(context, !(mode & ANDROID_LOG_NONBLOCK));
-    if (context->stop) goto close;
+    SetupOutputAndSchedulingPolicy(!(mode & ANDROID_LOG_NONBLOCK));
 
-    // LOG_EVENT_INT(10, 12345);
-    // LOG_EVENT_LONG(11, 0x1122334455667788LL);
-    // LOG_EVENT_STRING(0, "whassup, doc?");
-
-    dev = nullptr;
-
-    while (!context->stop &&
-           (!context->maxCount || (context->printCount < context->maxCount))) {
+    while (!max_count_ || print_count_ < max_count_) {
         struct log_msg log_msg;
-        int ret = android_logger_list_read(logger_list, &log_msg);
+        int ret = android_logger_list_read(logger_list.get(), &log_msg);
         if (!ret) {
-            logcat_panic(context, HELP_FALSE, "read: unexpected EOF!\n");
-            break;
+            error(EXIT_FAILURE, 0, R"init(Unexpected EOF!
+
+This means that either logd crashed, or more likely, this instance of logcat was unable to read log
+messages as quickly as they were being produced.
+
+If you have enabled significant logging, look into using the -G option to increase log buffer sizes.)init");
         }
 
         if (ret < 0) {
             if (ret == -EAGAIN) break;
 
             if (ret == -EIO) {
-                logcat_panic(context, HELP_FALSE, "read: unexpected EOF!\n");
-                break;
+                error(EXIT_FAILURE, 0, "Unexpected EOF!");
             }
             if (ret == -EINVAL) {
-                logcat_panic(context, HELP_FALSE, "read: unexpected length.\n");
-                break;
+                error(EXIT_FAILURE, 0, "Unexpected length.");
             }
-            logcat_panic(context, HELP_FALSE, "logcat read failure\n");
-            break;
+            error(EXIT_FAILURE, errno, "Logcat read failure");
         }
 
-        log_device_t* d;
-        for (d = context->devices; d; d = d->next) {
-            if (android_name_to_log_id(d->device) == log_msg.id()) break;
-        }
-        if (!d) {
-            context->devCount = 2; // set to Multiple
-            d = &unexpected;
-            d->binary = log_msg.id() == LOG_ID_EVENTS;
+        if (log_msg.id() > LOG_ID_MAX) {
+            error(EXIT_FAILURE, 0, "Unexpected log id (%d) over LOG_ID_MAX (%d).", log_msg.id(),
+                  LOG_ID_MAX);
         }
 
-        if (dev != d) {
-            dev = d;
-            maybePrintStart(context, dev, printDividers);
-            if (context->stop) break;
-        }
-        if (context->printBinary) {
-            printBinary(context, &log_msg);
+        PrintDividers(log_msg.id(), printDividers);
+
+        if (print_binary_) {
+            TEMP_FAILURE_RETRY(write(output_fd_.get(), &log_msg, log_msg.len()));
         } else {
-            processBuffer(context, dev, &log_msg);
+            ProcessBuffer(&log_msg);
         }
     }
-
-close:
-    // Short and sweet. Implemented generic version in android_logcat_destroy.
-    while (!!(dev = context->devices)) {
-        context->devices = dev->next;
-        delete dev;
-    }
-    android_logger_list_free(logger_list);
-
-exit:
-    // close write end of pipe to help things along
-    if (context->output_fd == context->fds[1]) {
-        android::close_output(context);
-    }
-    if (context->error_fd == context->fds[1]) {
-        android::close_error(context);
-    }
-    if (context->fds[1] >= 0) {
-        // NB: should be closed by the above
-        int save_errno = errno;
-        close(context->fds[1]);
-        errno = save_errno;
-        context->fds[1] = -1;
-    }
-    context->thread_stopped = true;
-    return context->retval;
+    return EXIT_SUCCESS;
 }
 
-// Can block
-int android_logcat_run_command(android_logcat_context ctx,
-                               int output, int error,
-                               int argc, char* const* argv,
-                               char* const* envp) {
-    android_logcat_context_internal* context = ctx;
-
-    context->output_fd = output;
-    context->error_fd = error;
-    context->argc = argc;
-    context->argv = argv;
-    context->envp = envp;
-    context->stop = false;
-    context->thread_stopped = false;
-    return __logcat(context);
-}
-
-// Finished with context
-int android_logcat_destroy(android_logcat_context* ctx) {
-    android_logcat_context_internal* context = *ctx;
-
-    if (!context) return -EBADF;
-
-    *ctx = nullptr;
-
-    context->stop = true;
-
-    while (context->thread_stopped == false) {
-        // Makes me sad, replace thread_stopped with semaphore.  Short lived.
-        sched_yield();
-    }
-
-    context->argv_hold.clear();
-    context->args.clear();
-    context->envp_hold.clear();
-    context->envs.clear();
-    if (context->fds[0] >= 0) {
-        close(context->fds[0]);
-        context->fds[0] = -1;
-    }
-    android::close_output(context);
-    android::close_error(context);
-
-    if (context->fds[1] >= 0) {
-        // NB: this should be closed by close_output, but just in case...
-        close(context->fds[1]);
-        context->fds[1] = -1;
-    }
-
-    android_closeEventTagMap(context->eventTagMap);
-
-    // generic cleanup of devices list to handle all possible dirty cases
-    log_device_t* dev;
-    while (!!(dev = context->devices)) {
-        struct logger_list* logger_list = dev->logger_list;
-        if (logger_list) {
-            for (log_device_t* d = dev; d; d = d->next) {
-                if (d->logger_list == logger_list) d->logger_list = nullptr;
-            }
-            android_logger_list_free(logger_list);
-        }
-        context->devices = dev->next;
-        delete dev;
-    }
-
-    int retval = context->retval;
-
-    free(context);
-
-    return retval;
+int main(int argc, char** argv) {
+    Logcat logcat;
+    return logcat.Run(argc, argv);
 }
diff --git a/logcat/logcat.h b/logcat/logcat.h
deleted file mode 100644
index 85ed7da..0000000
--- a/logcat/logcat.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright (C) 2005-2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <stdio.h>
-
-/*
- * The opaque context
- */
-typedef struct android_logcat_context_internal* android_logcat_context;
-
-/* Creates a context associated with this logcat instance
- *
- * Returns a pointer to the context, or a NULL on error.
- */
-android_logcat_context create_android_logcat();
-
-/* Collects and outputs the logcat data to output and error file descriptors
- *
- * Will block, performed in-thread and in-process
- *
- * The output file descriptor variable, if greater than or equal to 0, is
- * where the output (ie: stdout) will be sent. The file descriptor is closed
- * on android_logcat_destroy which terminates the instance, or when an -f flag
- * (output redirect to a file) is present in the command.  The error file
- * descriptor variable, if greater than or equal to 0, is where the error
- * stream (ie: stderr) will be sent, also closed on android_logcat_destroy.
- * The error file descriptor can be set to equal to the output file descriptor,
- * which will mix output and error stream content, and will defer closure of
- * the file descriptor on -f flag redirection.  Negative values for the file
- * descriptors will use stdout and stderr FILE references respectively
- * internally, and will not close the references as noted above.
- *
- * Return value is 0 for success, non-zero for errors.
- */
-int android_logcat_run_command(android_logcat_context ctx, int output, int error, int argc,
-                               char* const* argv, char* const* envp);
-
-/* Finished with context
- *
- * Kill the command thread ASAP (if any), and free up all associated resources.
- *
- * Return value is the result of the android_logcat_run_command, or
- * non-zero for any errors.
- */
-int android_logcat_destroy(android_logcat_context* ctx);
diff --git a/logcat/logcat_main.cpp b/logcat/logcat_main.cpp
deleted file mode 100644
index ecfa2ba..0000000
--- a/logcat/logcat_main.cpp
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <signal.h>
-#include <stdlib.h>
-
-#include "logcat.h"
-
-int main(int argc, char** argv, char** envp) {
-    android_logcat_context ctx = create_android_logcat();
-    if (!ctx) return -1;
-    signal(SIGPIPE, exit);
-    int retval = android_logcat_run_command(ctx, -1, -1, argc, argv, envp);
-    int ret = android_logcat_destroy(&ctx);
-    if (!ret) ret = retval;
-    return ret;
-}
diff --git a/logcat/logcatd b/logcat/logcatd
new file mode 100755
index 0000000..622e567
--- /dev/null
+++ b/logcat/logcatd
@@ -0,0 +1,25 @@
+#! /system/bin/sh
+
+# This is primarily meant to be used by logpersist.  This script is run as an init service, which
+# first reads the 'last' logcat to persistent storage with `-L` then run logcat again without
+# `-L` to read the current logcat buffers to persistent storage.
+
+has_last="false"
+for arg in "$@"; do
+  if [ "$arg" == "-L" -o "$arg" == "--last" ]; then
+    has_last="true"
+  fi
+done
+
+if [ "$has_last" == "true" ]; then
+  logcat "$@"
+fi
+
+args_without_last=()
+for arg in "$@"; do
+  if [ "$arg" != "-L" -a "$arg" != "--last" ]; then
+    ARGS+=("$arg")
+  fi
+done
+
+exec logcat "${ARGS[@]}"
diff --git a/logcat/logcatd.rc b/logcat/logcatd.rc
index 26c9de3..e986184 100644
--- a/logcat/logcatd.rc
+++ b/logcat/logcatd.rc
@@ -52,7 +52,7 @@
     stop logcatd
 
 # logcatd service
-service logcatd /system/bin/logcatd -L -b ${logd.logpersistd.buffer:-all} -v threadtime -v usec -v printable -D -f /data/misc/logd/logcat -r ${logd.logpersistd.rotate_kbytes:-1024} -n ${logd.logpersistd.size:-256} --id=${ro.build.id}
+service logcatd /system/bin/logcatd -L -b ${logd.logpersistd.buffer:-all} -v threadtime -v usec -v printable -D -f /data/misc/logd/logcat -r ${logd.logpersistd.rotate_kbytes:-2048} -n ${logd.logpersistd.size:-256} --id=${ro.build.id}
     class late_start
     disabled
     # logd for write to /data/misc/logd, log group for read from log daemon
diff --git a/logcat/logcatd_main.cpp b/logcat/logcatd_main.cpp
deleted file mode 100644
index c131846..0000000
--- a/logcat/logcatd_main.cpp
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <signal.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <string>
-#include <vector>
-
-#include "logcat.h"
-
-int main(int argc, char** argv, char** envp) {
-    android_logcat_context ctx = create_android_logcat();
-    if (!ctx) return -1;
-
-    signal(SIGPIPE, exit);
-
-    // Save and detect presence of -L or --last flag
-    std::vector<std::string> args;
-    bool last = false;
-    for (int i = 0; i < argc; ++i) {
-        if (!argv[i]) continue;
-        args.push_back(std::string(argv[i]));
-        if (!strcmp(argv[i], "-L") || !strcmp(argv[i], "--last")) last = true;
-    }
-
-    // Generate argv from saved content
-    std::vector<const char*> argv_hold;
-    for (auto& str : args) argv_hold.push_back(str.c_str());
-    argv_hold.push_back(nullptr);
-
-    int ret = 0;
-    if (last) {
-        // Run logcat command with -L flag
-        ret = android_logcat_run_command(ctx, -1, -1, argv_hold.size() - 1,
-                                         (char* const*)&argv_hold[0], envp);
-        // Remove -L and --last flags from argument list
-        for (std::vector<const char*>::iterator it = argv_hold.begin();
-             it != argv_hold.end();) {
-            if (!*it || (strcmp(*it, "-L") && strcmp(*it, "--last"))) {
-                ++it;
-            } else {
-                it = argv_hold.erase(it);
-            }
-        }
-        // fall through to re-run the command regardless of the arguments
-        // passed in.  For instance, we expect -h to report help stutter.
-    }
-
-    // Run logcat command without -L flag
-    int retval = android_logcat_run_command(ctx, -1, -1, argv_hold.size() - 1,
-                                            (char* const*)&argv_hold[0], envp);
-    if (!ret) ret = retval;
-    retval = android_logcat_destroy(&ctx);
-    if (!ret) ret = retval;
-    return ret;
-}
diff --git a/logcat/logpersist b/logcat/logpersist
index c09b6b2..05b46f0 100755
--- a/logcat/logpersist
+++ b/logcat/logpersist
@@ -148,9 +148,9 @@
     echo "WARNING: Can not use --size or --buffer with ${progname%.*}.stop" >&2
   fi
   if [ "true" = "${clear}" ]; then
-    setprop ${property} "clear"
+    setprop ${property#persist.} "clear"
   else
-    setprop ${property} "stop"
+    setprop ${property#persist.} "stop"
   fi
   if [ -n "`getprop ${property#persist.}.buffer`" ]; then
     setprop ${property}.buffer ""
diff --git a/logd/CommandListener.cpp b/logd/CommandListener.cpp
index 7a843d8..694b5fa 100644
--- a/logd/CommandListener.cpp
+++ b/logd/CommandListener.cpp
@@ -19,6 +19,7 @@
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <math.h>
 #include <netinet/in.h>
 #include <stdlib.h>
 #include <string.h>
@@ -186,14 +187,26 @@
     : LogCommand("getStatistics"), mBuf(*buf) {
 }
 
-static std::string package_string(const std::string& str) {
-    // Calculate total buffer size prefix, count is the string length w/o nul
-    char fmt[32];
-    for (size_t l = str.length(), y = 0, x = 6; y != x;
-         y = x, x = strlen(fmt) - 2) {
-        snprintf(fmt, sizeof(fmt), "%zu\n%%s\n\f", l + x);
+// This returns a string with a length prefix with the format <length>\n<data>\n\f.  The length
+// prefix includes the length of the prefix itself.
+static std::string PackageString(const std::string& str) {
+    size_t overhead_length = 3;  // \n \n \f.
+
+    // Number of digits needed to represent length(str + overhead_length).
+    size_t str_size_digits = 1 + static_cast<size_t>(log10(str.size() + overhead_length));
+    // Number of digits needed to represent the total size.
+    size_t total_size_digits =
+            1 + static_cast<size_t>(log10(str.size() + overhead_length + str_size_digits));
+
+    // If adding the size prefix causes a new digit to be required to represent the new total
+    // size, add it to the 'overhead_length'.  This can only happen once, since each new digit
+    // allows for 10x the previous size to be recorded.
+    if (total_size_digits != str_size_digits) {
+        overhead_length++;
     }
-    return android::base::StringPrintf(fmt, str.c_str());
+
+    size_t total_size = str.size() + overhead_length + str_size_digits;
+    return android::base::StringPrintf("%zu\n%s\n\f", total_size, str.c_str());
 }
 
 int CommandListener::GetStatisticsCmd::runCommand(SocketClient* cli, int argc,
@@ -228,8 +241,7 @@
         }
     }
 
-    cli->sendMsg(
-        package_string(mBuf.formatStatistics(uid, pid, logMask)).c_str());
+    cli->sendMsg(PackageString(mBuf.formatStatistics(uid, pid, logMask)).c_str());
     return 0;
 }
 
@@ -240,7 +252,7 @@
 int CommandListener::GetPruneListCmd::runCommand(SocketClient* cli,
                                                  int /*argc*/, char** /*argv*/) {
     setname();
-    cli->sendMsg(package_string(mBuf.formatPrune()).c_str());
+    cli->sendMsg(PackageString(mBuf.formatPrune()).c_str());
     return 0;
 }
 
@@ -316,12 +328,11 @@
             cli->sendMsg("can not mix id= with either format= or name=");
             return 0;
         }
-        cli->sendMsg(package_string(mBuf.formatEntry(atoi(id), uid)).c_str());
+        cli->sendMsg(PackageString(mBuf.formatEntry(atoi(id), uid)).c_str());
         return 0;
     }
 
-    cli->sendMsg(
-        package_string(mBuf.formatGetEventTag(uid, name, format)).c_str());
+    cli->sendMsg(PackageString(mBuf.formatGetEventTag(uid, name, format)).c_str());
 
     return 0;
 }
diff --git a/logd/LogAudit.cpp b/logd/LogAudit.cpp
index 5a375ec..d9cc0db 100644
--- a/logd/LogAudit.cpp
+++ b/logd/LogAudit.cpp
@@ -143,10 +143,6 @@
 
 void LogAudit::auditParse(const std::string& string, uid_t uid,
                           std::string* bug_num) {
-    if (!__android_log_is_debuggable()) {
-        bug_num->assign("");
-        return;
-    }
     static std::map<std::string, std::string> denial_to_bug =
         populateDenialMap();
     std::string scontext = denialParse(string, ':', "scontext=u:object_r:");
@@ -160,7 +156,7 @@
     }
     auto search = denial_to_bug.find(scontext + tcontext + tclass);
     if (search != denial_to_bug.end()) {
-        bug_num->assign(" b/" + search->second);
+        bug_num->assign(" " + search->second);
     } else {
         bug_num->assign("");
     }
diff --git a/logd/LogBuffer.cpp b/logd/LogBuffer.cpp
index 9cbc7c4..834b20b 100644
--- a/logd/LogBuffer.cpp
+++ b/logd/LogBuffer.cpp
@@ -638,6 +638,8 @@
     if (stats.sizes(id) > (2 * log_buffer_size(id))) {  // +100%
         // A misbehaving or slow reader has its connection
         // dropped if we hit too much memory pressure.
+        android::prdebug("Kicking blocked reader, pid %d, from LogBuffer::kickMe()\n",
+                         me->mClient->getPid());
         me->release_Locked();
     } else if (me->mTimeout.tv_sec || me->mTimeout.tv_nsec) {
         // Allow a blocked WRAP timeout reader to
@@ -645,6 +647,9 @@
         me->triggerReader_Locked();
     } else {
         // tell slow reader to skip entries to catch up
+        android::prdebug(
+                "Skipping %lu entries from slow reader, pid %d, from LogBuffer::kickMe()\n",
+                pruneRows, me->mClient->getPid());
         me->triggerSkip_Locked(id, pruneRows);
     }
 }
@@ -1051,6 +1056,9 @@
                     LogTimeEntry* entry = times->get();
                     // Killer punch
                     if (entry->isWatching(id)) {
+                        android::prdebug(
+                                "Kicking blocked reader, pid %d, from LogBuffer::clear()\n",
+                                entry->mClient->getPid());
                         entry->release_Locked();
                     }
                     times++;
@@ -1185,7 +1193,7 @@
         unlock();
 
         // range locking in LastLogTimes looks after us
-        curr = element->flushTo(reader, this, privileged, sameTid);
+        curr = element->flushTo(reader, this, sameTid);
 
         if (curr == element->FLUSH_ERROR) {
             return curr;
diff --git a/logd/LogBufferElement.cpp b/logd/LogBufferElement.cpp
index 2fd9f95..ec81933 100644
--- a/logd/LogBufferElement.cpp
+++ b/logd/LogBufferElement.cpp
@@ -56,14 +56,7 @@
       mLogId(elem.mLogId),
       mDropped(elem.mDropped) {
     if (mDropped) {
-        if (elem.isBinary() && elem.mMsg != nullptr) {
-            // for the following "len" value, refer to : setDropped(uint16_t value), getTag()
-            const int len = sizeof(android_event_header_t);
-            mMsg = new char[len];
-            memcpy(mMsg, elem.mMsg, len);
-        } else {
-            mMsg = nullptr;
-        }
+        mTag = elem.getTag();
     } else {
         mMsg = new char[mMsgLen];
         memcpy(mMsg, elem.mMsg, mMsgLen);
@@ -71,31 +64,43 @@
 }
 
 LogBufferElement::~LogBufferElement() {
-    delete[] mMsg;
+    if (!mDropped) {
+        delete[] mMsg;
+    }
 }
 
 uint32_t LogBufferElement::getTag() const {
-    return (isBinary() &&
-            ((mDropped && mMsg != nullptr) ||
-             (!mDropped && mMsgLen >= sizeof(android_event_header_t))))
-               ? reinterpret_cast<const android_event_header_t*>(mMsg)->tag
-               : 0;
+    // Binary buffers have no tag.
+    if (!isBinary()) {
+        return 0;
+    }
+
+    // Dropped messages store the tag in place of mMsg.
+    if (mDropped) {
+        return mTag;
+    }
+
+    // For non-dropped messages, we get the tag from the message header itself.
+    if (mMsgLen < sizeof(android_event_header_t)) {
+        return 0;
+    }
+
+    return reinterpret_cast<const android_event_header_t*>(mMsg)->tag;
 }
 
 uint16_t LogBufferElement::setDropped(uint16_t value) {
-    // The tag information is saved in mMsg data, if the tag is non-zero
-    // save only the information needed to get the tag.
-    if (getTag() != 0) {
-        if (mMsgLen > sizeof(android_event_header_t)) {
-            char* truncated_msg = new char[sizeof(android_event_header_t)];
-            memcpy(truncated_msg, mMsg, sizeof(android_event_header_t));
-            delete[] mMsg;
-            mMsg = truncated_msg;
-        }  // mMsgLen == sizeof(android_event_header_t), already at minimum.
-    } else {
-        delete[] mMsg;
-        mMsg = nullptr;
+    if (mDropped) {
+        return mDroppedCount = value;
     }
+
+    // The tag information is saved in mMsg data, which is in a union with mTag, used after mDropped
+    // is set to true. Therefore we save the tag value aside, delete mMsg, then set mTag to the tag
+    // value in its place.
+    auto old_tag = getTag();
+    delete[] mMsg;
+    mMsg = nullptr;
+
+    mTag = old_tag;
     mDropped = true;
     return mDroppedCount = value;
 }
@@ -239,14 +244,10 @@
     return retval;
 }
 
-log_time LogBufferElement::flushTo(SocketClient* reader, LogBuffer* parent,
-                                   bool privileged, bool lastSame) {
-    struct logger_entry_v4 entry;
+log_time LogBufferElement::flushTo(SocketClient* reader, LogBuffer* parent, bool lastSame) {
+    struct logger_entry entry = {};
 
-    memset(&entry, 0, sizeof(struct logger_entry_v4));
-
-    entry.hdr_size = privileged ? sizeof(struct logger_entry_v4)
-                                : sizeof(struct logger_entry_v3);
+    entry.hdr_size = sizeof(struct logger_entry);
     entry.lid = mLogId;
     entry.pid = mPid;
     entry.tid = mTid;
diff --git a/logd/LogBufferElement.h b/logd/LogBufferElement.h
index 57b0a95..fd790e4 100644
--- a/logd/LogBufferElement.h
+++ b/logd/LogBufferElement.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LOGD_LOG_BUFFER_ELEMENT_H__
-#define _LOGD_LOG_BUFFER_ELEMENT_H__
+#pragma once
 
 #include <stdatomic.h>
 #include <stdint.h>
@@ -41,7 +40,10 @@
     const uint32_t mPid;
     const uint32_t mTid;
     log_time mRealTime;
-    char* mMsg;
+    union {
+        char* mMsg;    // mDropped == false
+        int32_t mTag;  // mDropped == true
+    };
     union {
         const uint16_t mMsgLen;  // mDropped == false
         uint16_t mDroppedCount;  // mDropped == true
@@ -93,8 +95,5 @@
     }
 
     static const log_time FLUSH_ERROR;
-    log_time flushTo(SocketClient* writer, LogBuffer* parent, bool privileged,
-                     bool lastSame);
+    log_time flushTo(SocketClient* writer, LogBuffer* parent, bool lastSame);
 };
-
-#endif
diff --git a/logd/LogListener.cpp b/logd/LogListener.cpp
index 443570f..ba61042 100644
--- a/logd/LogListener.cpp
+++ b/logd/LogListener.cpp
@@ -41,8 +41,7 @@
     }
 
     // + 1 to ensure null terminator if MAX_PAYLOAD buffer is received
-    char buffer[sizeof_log_id_t + sizeof(uint16_t) + sizeof(log_time) +
-                LOGGER_ENTRY_MAX_PAYLOAD + 1];
+    char buffer[sizeof(android_log_header_t) + LOGGER_ENTRY_MAX_PAYLOAD + 1];
     struct iovec iov = { buffer, sizeof(buffer) - 1 };
 
     alignas(4) char control[CMSG_SPACE(sizeof(struct ucred))];
diff --git a/logd/LogTags.cpp b/logd/LogTags.cpp
index f19e7b0..0cc7886 100644
--- a/logd/LogTags.cpp
+++ b/logd/LogTags.cpp
@@ -311,9 +311,7 @@
         if (log_msg.entry.len <= sizeof(uint32_t)) continue;
         uint32_t Tag = get4LE(msg);
         if (Tag != TAG_DEF_LOG_TAG) continue;
-        uid_t uid = (log_msg.entry.hdr_size >= sizeof(logger_entry_v4))
-                        ? log_msg.entry.uid
-                        : AID_ROOT;
+        uid_t uid = log_msg.entry.uid;
 
         std::string Name;
         std::string Format;
diff --git a/libnativeloader/test/api_test.c b/logd/fuzz/Android.bp
similarity index 63%
rename from libnativeloader/test/api_test.c
rename to logd/fuzz/Android.bp
index e7025fd..299242d 100644
--- a/libnativeloader/test/api_test.c
+++ b/logd/fuzz/Android.bp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2019 The Android Open Source Project
+ * Copyright 2019 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,13 +13,18 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
-/* The main purpose of this test is to ensure this C header compiles in C, so
- * that no C++ features inadvertently leak into the C ABI. */
-#include "nativeloader/native_loader.h"
-
-int main(int argc, char** argv) {
-  (void)argc;
-  (void)argv;
-  return 0;
+cc_fuzz {
+    name: "log_buffer_log_fuzzer",
+    srcs: [
+        "log_buffer_log_fuzzer.cpp",
+    ],
+    static_libs: [
+        "libbase",
+        "libcutils",
+        "libselinux",
+        "liblog",
+        "liblogd",
+        "libcutils",
+    ],
+    cflags: ["-Werror"],
 }
diff --git a/logd/fuzz/log_buffer_log_fuzzer.cpp b/logd/fuzz/log_buffer_log_fuzzer.cpp
new file mode 100644
index 0000000..4d1589b
--- /dev/null
+++ b/logd/fuzz/log_buffer_log_fuzzer.cpp
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <string>
+
+#include "../LogBuffer.h"
+#include "../LogTimes.h"
+
+// We don't want to waste a lot of entropy on messages
+#define MAX_MSG_LENGTH 5
+
+// Tag IDs usually start at 1000, we only want to try 1000 through 1009
+#define MIN_TAG_ID 1000
+#define TAG_MOD 10
+
+namespace android {
+struct LogInput {
+  public:
+    log_id_t log_id;
+    log_time realtime;
+    uid_t uid;
+    pid_t pid;
+    pid_t tid;
+    unsigned int log_mask;
+};
+
+int write_log_messages(const uint8_t** pdata, size_t* data_left, LogBuffer* log_buffer) {
+    const uint8_t* data = *pdata;
+    const LogInput* logInput = reinterpret_cast<const LogInput*>(data);
+    data += sizeof(LogInput);
+    *data_left -= sizeof(LogInput);
+
+    uint32_t tag = MIN_TAG_ID + data[0] % TAG_MOD;
+    uint8_t msg_length = data[1] % MAX_MSG_LENGTH;
+    if (msg_length < 2) {
+        // Not enough data for message
+        return 0;
+    }
+
+    data += 2 * sizeof(uint8_t);
+    *data_left -= 2 * sizeof(uint8_t);
+
+    if (*data_left < msg_length) {
+        // Not enough data for tag and message
+        *pdata = data;
+        return 0;
+    }
+
+    // We need nullterm'd strings
+    char msg[sizeof(uint32_t) + MAX_MSG_LENGTH + sizeof(char)];
+    char* msg_only = msg + sizeof(uint32_t);
+    memcpy(msg, &tag, sizeof(uint32_t));
+    memcpy(msg_only, data, msg_length);
+    msg_only[msg_length] = '\0';
+    data += msg_length;
+    *data_left -= msg_length;
+
+    // Other elements not in enum.
+    log_id_t log_id = static_cast<log_id_t>(unsigned(logInput->log_id) % (LOG_ID_MAX + 1));
+    log_buffer->log(log_id, logInput->realtime, logInput->uid, logInput->pid, logInput->tid, msg,
+                    sizeof(uint32_t) + msg_length + 1);
+    log_buffer->formatStatistics(logInput->uid, logInput->pid, logInput->log_mask);
+    *pdata = data;
+    return 1;
+}
+
+// Because system/core/logd/main.cpp redefines these.
+void prdebug(char const* fmt, ...) {
+    va_list ap;
+    va_start(ap, fmt);
+    vfprintf(stderr, fmt, ap);
+    va_end(ap);
+}
+char* uidToName(uid_t) {
+    return strdup("fake");
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+    // We want a random tag length and a random remaining message length
+    if (data == nullptr || size < sizeof(LogInput) + 2 * sizeof(uint8_t)) {
+        return 0;
+    }
+
+    LastLogTimes times;
+    LogBuffer log_buffer(&times);
+    size_t data_left = size;
+    const uint8_t** pdata = &data;
+
+    log_buffer.enableStatistics();
+    log_buffer.initPrune(nullptr);
+    // We want to get pruning code to get called.
+    log_id_for_each(i) { log_buffer.setSize(i, 10000); }
+
+    while (data_left >= sizeof(LogInput) + 2 * sizeof(uint8_t)) {
+        if (!write_log_messages(pdata, &data_left, &log_buffer)) {
+            return 0;
+        }
+    }
+
+    log_id_for_each(i) { log_buffer.clear(i); }
+    return 0;
+}
+}  // namespace android
diff --git a/logd/tests/logd_test.cpp b/logd/tests/logd_test.cpp
index b6c33d7..f47bee1 100644
--- a/logd/tests/logd_test.cpp
+++ b/logd/tests/logd_test.cpp
@@ -241,47 +241,18 @@
 static void caught_signal(int /* signum */) {
 }
 
-static void dump_log_msg(const char* prefix, log_msg* msg, unsigned int version,
-                         int lid) {
+static void dump_log_msg(const char* prefix, log_msg* msg, int lid) {
     std::cout << std::flush;
     std::cerr << std::flush;
     fflush(stdout);
     fflush(stderr);
-    switch (msg->entry.hdr_size) {
-        case 0:
-            version = 1;
-            break;
+    EXPECT_EQ(sizeof(logger_entry), msg->entry.hdr_size);
 
-        case sizeof(msg->entry_v2): /* PLUS case sizeof(msg->entry_v3): */
-            if (version == 0) {
-                version = (msg->entry_v3.lid < LOG_ID_MAX) ? 3 : 2;
-            }
-            break;
-
-        case sizeof(msg->entry_v4):
-            if (version == 0) {
-                version = 4;
-            }
-            break;
-    }
-
-    fprintf(stderr, "%s: v%u[%u] ", prefix, version, msg->len());
-    if (version != 1) {
-        fprintf(stderr, "hdr_size=%u ", msg->entry.hdr_size);
-    }
-    fprintf(stderr, "pid=%u tid=%u %u.%09u ", msg->entry.pid, msg->entry.tid,
-            msg->entry.sec, msg->entry.nsec);
-    switch (version) {
-        case 1:
-            break;
-        case 2:
-            fprintf(stderr, "euid=%u ", msg->entry_v2.euid);
-            break;
-        case 3:
-        default:
-            lid = msg->entry.lid;
-            break;
-    }
+    fprintf(stderr, "%s: [%u] ", prefix, msg->len());
+    fprintf(stderr, "hdr_size=%u ", msg->entry.hdr_size);
+    fprintf(stderr, "pid=%u tid=%u %u.%09u ", msg->entry.pid, msg->entry.tid, msg->entry.sec,
+            msg->entry.nsec);
+    lid = msg->entry.lid;
 
     switch (lid) {
         case 0:
@@ -349,86 +320,6 @@
 }
 #endif
 
-TEST(logd, both) {
-#ifdef __ANDROID__
-    log_msg msg;
-
-    // check if we can read any logs from logd
-    bool user_logger_available = false;
-    bool user_logger_content = false;
-
-    int fd = socket_local_client("logdr", ANDROID_SOCKET_NAMESPACE_RESERVED,
-                                 SOCK_SEQPACKET);
-    if (fd >= 0) {
-        struct sigaction ignore, old_sigaction;
-        memset(&ignore, 0, sizeof(ignore));
-        ignore.sa_handler = caught_signal;
-        sigemptyset(&ignore.sa_mask);
-        sigaction(SIGALRM, &ignore, &old_sigaction);
-        unsigned int old_alarm = alarm(10);
-
-        static const char ask[] = "dumpAndClose lids=0,1,2,3";
-        user_logger_available = write(fd, ask, sizeof(ask)) == sizeof(ask);
-
-        user_logger_content = recv(fd, msg.buf, sizeof(msg), 0) > 0;
-
-        if (user_logger_content) {
-            dump_log_msg("user", &msg, 3, -1);
-        }
-
-        alarm(old_alarm);
-        sigaction(SIGALRM, &old_sigaction, nullptr);
-
-        close(fd);
-    }
-
-    // check if we can read any logs from kernel logger
-    bool kernel_logger_available = false;
-    bool kernel_logger_content = false;
-
-    static const char* loggers[] = {
-        "/dev/log/main",   "/dev/log_main",   "/dev/log/radio",
-        "/dev/log_radio",  "/dev/log/events", "/dev/log_events",
-        "/dev/log/system", "/dev/log_system",
-    };
-
-    for (unsigned int i = 0; i < arraysize(loggers); ++i) {
-        fd = open(loggers[i], O_RDONLY);
-        if (fd < 0) {
-            continue;
-        }
-        kernel_logger_available = true;
-        fcntl(fd, F_SETFL, O_RDONLY | O_NONBLOCK);
-        int result = TEMP_FAILURE_RETRY(read(fd, msg.buf, sizeof(msg)));
-        if (result > 0) {
-            kernel_logger_content = true;
-            dump_log_msg("kernel", &msg, 0, i / 2);
-        }
-        close(fd);
-    }
-
-    static const char yes[] = "\xE2\x9C\x93";
-    static const char no[] = "\xE2\x9c\x98";
-    fprintf(stderr,
-            "LOGGER  Available  Content\n"
-            "user    %-13s%s\n"
-            "kernel  %-13s%s\n"
-            " status %-11s%s\n",
-            (user_logger_available) ? yes : no, (user_logger_content) ? yes : no,
-            (kernel_logger_available) ? yes : no,
-            (kernel_logger_content) ? yes : no,
-            (user_logger_available && kernel_logger_available) ? "ERROR" : "ok",
-            (user_logger_content && kernel_logger_content) ? "ERROR" : "ok");
-
-    EXPECT_EQ(0, user_logger_available && kernel_logger_available);
-    EXPECT_EQ(0, !user_logger_available && !kernel_logger_available);
-    EXPECT_EQ(0, user_logger_content && kernel_logger_content);
-    EXPECT_EQ(0, !user_logger_content && !kernel_logger_content);
-#else
-    GTEST_LOG_(INFO) << "This test does nothing.\n";
-#endif
-}
-
 #ifdef __ANDROID__
 // BAD ROBOT
 //   Benchmark threshold are generally considered bad form unless there is
@@ -664,11 +555,11 @@
     }
 
     if (content_wrap) {
-        dump_log_msg("wrap", &msg_wrap, 3, -1);
+        dump_log_msg("wrap", &msg_wrap, -1);
     }
 
     if (content_timeout) {
-        dump_log_msg("timeout", &msg_timeout, 3, -1);
+        dump_log_msg("timeout", &msg_timeout, -1);
     }
 
     EXPECT_TRUE(written);
@@ -801,11 +692,11 @@
     }
 
     if (content_wrap) {
-        dump_log_msg("wrap", &msg_wrap, 3, -1);
+        dump_log_msg("wrap", &msg_wrap, -1);
     }
 
     if (content_timeout) {
-        dump_log_msg("timeout", &msg_timeout, 3, -1);
+        dump_log_msg("timeout", &msg_timeout, -1);
     }
 
     if (content_wrap || !content_timeout) {
@@ -856,7 +747,7 @@
 
     EXPECT_TRUE(read_one);
     if (read_one) {
-        dump_log_msg("user", &msg, 3, -1);
+        dump_log_msg("user", &msg, -1);
     }
 
     fprintf(stderr, "Sleep for >%d seconds logd SO_SNDTIMEO ...\n", sndtimeo);
@@ -874,7 +765,7 @@
 
     EXPECT_EQ(0, recv_ret);
     if (recv_ret > 0) {
-        dump_log_msg("user", &msg, 3, -1);
+        dump_log_msg("user", &msg, -1);
     }
     EXPECT_EQ(0, save_errno);
 
diff --git a/logwrapper/Android.bp b/logwrapper/Android.bp
index c378646..8851a47 100644
--- a/logwrapper/Android.bp
+++ b/logwrapper/Android.bp
@@ -13,11 +13,12 @@
     name: "liblogwrap",
     defaults: ["logwrapper_defaults"],
     recovery_available: true,
-    srcs: ["logwrap.c"],
+    srcs: ["logwrap.cpp"],
     shared_libs: [
         "libcutils",
         "liblog",
     ],
+    header_libs: ["libbase_headers"],
     export_include_dirs: ["include"],
     local_include_dirs: ["include"],
 }
@@ -31,9 +32,10 @@
     defaults: ["logwrapper_defaults"],
     local_include_dirs: ["include"],
     srcs: [
-        "logwrap.c",
-        "logwrapper.c",
+        "logwrap.cpp",
+        "logwrapper.cpp",
     ],
+    header_libs: ["libbase_headers"],
     shared_libs: ["libcutils", "liblog"],
 }
 
@@ -54,10 +56,10 @@
 // ========================================================
 
 cc_benchmark {
-    name: "android_fork_execvp_ext_benchmark",
+    name: "logwrap_fork_execvp_benchmark",
     defaults: ["logwrapper_defaults"],
     srcs: [
-        "android_fork_execvp_ext_benchmark.cpp",
+        "logwrap_fork_execvp_benchmark.cpp",
     ],
     shared_libs: [
         "libbase",
diff --git a/logwrapper/include/logwrap/logwrap.h b/logwrapper/include/logwrap/logwrap.h
index d3538b3..cb40ee2 100644
--- a/logwrapper/include/logwrap/logwrap.h
+++ b/logwrapper/include/logwrap/logwrap.h
@@ -15,23 +15,11 @@
  * limitations under the License.
  */
 
-#ifndef __LIBS_LOGWRAP_H
-#define __LIBS_LOGWRAP_H
-
-#include <stdbool.h>
-#include <stdint.h>
-
-__BEGIN_DECLS
+#pragma once
 
 /*
  * Run a command while logging its stdout and stderr
  *
- * WARNING: while this function is running it will clear all SIGCHLD handlers
- * if you rely on SIGCHLD in the caller there is a chance zombies will be
- * created if you're not calling waitpid after calling this. This function will
- * log a warning when it clears SIGCHLD for processes other than the child it
- * created.
- *
  * Arguments:
  *   argc:   the number of elements in argv
  *   argv:   an array of strings containing the command to be executed and its
@@ -40,10 +28,10 @@
  *   status: the equivalent child status as populated by wait(status). This
  *           value is only valid when logwrap successfully completes. If NULL
  *           the return value of the child will be the function's return value.
- *   ignore_int_quit: set to true if you want to completely ignore SIGINT and
- *           SIGQUIT while logwrap is running. This may force the end-user to
- *           send a signal twice to signal the caller (once for the child, and
- *           once for the caller)
+ *   forward_signals: set to true if you want to forward SIGINT, SIGQUIT, and
+ *           SIGHUP to the child process, while it is running.  You likely do
+ *           not need to use this; it is primarily for the logwrapper
+ *           executable itself.
  *   log_target: Specify where to log the output of the child, either LOG_NONE,
  *           LOG_ALOG (for the Android system log), LOG_KLOG (for the kernel
  *           log), or LOG_FILE (and you need to specify a pathname in the
@@ -54,8 +42,6 @@
  *           the specified log until the child has exited.
  *   file_path: if log_target has the LOG_FILE bit set, then this parameter
  *           must be set to the pathname of the file to log to.
- *   unused_opts: currently unused.
- *   unused_opts_len: currently unused.
  *
  * Return value:
  *   0 when logwrap successfully run the child process and captured its status
@@ -65,29 +51,11 @@
  *
  */
 
-/* Values for the log_target parameter android_fork_execvp_ext() */
+/* Values for the log_target parameter logwrap_fork_execvp() */
 #define LOG_NONE        0
 #define LOG_ALOG        1
 #define LOG_KLOG        2
 #define LOG_FILE        4
 
-// TODO: Remove unused_opts / unused_opts_len in a followup change.
-int android_fork_execvp_ext(int argc, char* argv[], int *status, bool ignore_int_quit,
-        int log_target, bool abbreviated, char *file_path, void* unused_opts,
-        int unused_opts_len);
-
-/* Similar to above, except abbreviated logging is not available, and if logwrap
- * is true, logging is to the Android system log, and if false, there is no
- * logging.
- */
-static inline int android_fork_execvp(int argc, char* argv[], int *status,
-                                     bool ignore_int_quit, bool logwrap)
-{
-    return android_fork_execvp_ext(argc, argv, status, ignore_int_quit,
-                                   (logwrap ? LOG_ALOG : LOG_NONE), false, NULL,
-                                   NULL, 0);
-}
-
-__END_DECLS
-
-#endif /* __LIBS_LOGWRAP_H */
+int logwrap_fork_execvp(int argc, const char* const* argv, int* status, bool forward_signals,
+                        int log_target, bool abbreviated, const char* file_path);
diff --git a/logwrapper/logwrap.c b/logwrapper/logwrap.cpp
similarity index 62%
rename from logwrapper/logwrap.c
rename to logwrapper/logwrap.cpp
index 8621993..5337801 100644
--- a/logwrapper/logwrap.c
+++ b/logwrapper/logwrap.cpp
@@ -19,7 +19,6 @@
 #include <libgen.h>
 #include <poll.h>
 #include <pthread.h>
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -28,26 +27,31 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
+#include <algorithm>
+
+#include <android-base/macros.h>
 #include <cutils/klog.h>
 #include <log/log.h>
 #include <logwrap/logwrap.h>
 
-#define ARRAY_SIZE(x)   (sizeof(x) / sizeof(*(x)))
-#define MIN(a,b) (((a)<(b))?(a):(b))
-
 static pthread_mutex_t fd_mutex = PTHREAD_MUTEX_INITIALIZER;
+// Protected by fd_mutex.  These signals must be blocked while modifying as well.
+static pid_t child_pid;
+static struct sigaction old_int;
+static struct sigaction old_quit;
+static struct sigaction old_hup;
 
-#define ERROR(fmt, args...)                                                   \
-do {                                                                          \
-    fprintf(stderr, fmt, ## args);                                            \
-    ALOG(LOG_ERROR, "logwrapper", fmt, ## args);                              \
-} while(0)
+#define ERROR(fmt, args...)                         \
+    do {                                            \
+        fprintf(stderr, fmt, ##args);               \
+        ALOG(LOG_ERROR, "logwrapper", fmt, ##args); \
+    } while (0)
 
-#define FATAL_CHILD(fmt, args...)                                             \
-do {                                                                          \
-    ERROR(fmt, ## args);                                                      \
-    _exit(-1);                                                                \
-} while(0)
+#define FATAL_CHILD(fmt, args...) \
+    do {                          \
+        ERROR(fmt, ##args);       \
+        _exit(-1);                \
+    } while (0)
 
 #define MAX_KLOG_TAG 16
 
@@ -56,7 +60,7 @@
  */
 #define BEGINNING_BUF_SIZE 0x1000
 struct beginning_buf {
-    char *buf;
+    char* buf;
     size_t alloc_len;
     /* buf_size is the usable space, which is one less than the allocated size */
     size_t buf_size;
@@ -69,7 +73,7 @@
  */
 #define ENDING_BUF_SIZE 0x1000
 struct ending_buf {
-    char *buf;
+    char* buf;
     ssize_t alloc_len;
     /* buf_size is the usable space, which is one less than the allocated size */
     ssize_t buf_size;
@@ -79,7 +83,7 @@
     int write;
 };
 
- /* A structure to hold all the abbreviated buf data */
+/* A structure to hold all the abbreviated buf data */
 struct abbr_buf {
     struct beginning_buf b_buf;
     struct ending_buf e_buf;
@@ -90,19 +94,17 @@
 struct log_info {
     int log_target;
     char klog_fmt[MAX_KLOG_TAG * 2];
-    char *btag;
+    const char* btag;
     bool abbreviated;
-    FILE *fp;
+    FILE* fp;
     struct abbr_buf a_buf;
 };
 
 /* Forware declaration */
-static void add_line_to_abbr_buf(struct abbr_buf *a_buf, char *linebuf, int linelen);
+static void add_line_to_abbr_buf(struct abbr_buf* a_buf, char* linebuf, int linelen);
 
 /* Return 0 on success, and 1 when full */
-static int add_line_to_linear_buf(struct beginning_buf *b_buf,
-                                   char *line, ssize_t line_len)
-{
+static int add_line_to_linear_buf(struct beginning_buf* b_buf, char* line, ssize_t line_len) {
     int full = 0;
 
     if ((line_len + b_buf->used_len) > b_buf->buf_size) {
@@ -116,20 +118,18 @@
     return full;
 }
 
-static void add_line_to_circular_buf(struct ending_buf *e_buf,
-                                     char *line, ssize_t line_len)
-{
+static void add_line_to_circular_buf(struct ending_buf* e_buf, char* line, ssize_t line_len) {
     ssize_t free_len;
     ssize_t needed_space;
     int cnt;
 
-    if (e_buf->buf == NULL) {
+    if (e_buf->buf == nullptr) {
         return;
     }
 
-   if (line_len > e_buf->buf_size) {
-       return;
-   }
+    if (line_len > e_buf->buf_size) {
+        return;
+    }
 
     free_len = e_buf->buf_size - e_buf->used_len;
 
@@ -144,7 +144,7 @@
     /* Copy the line into the circular buffer, dealing with possible
      * wraparound.
      */
-    cnt = MIN(line_len, e_buf->buf_size - e_buf->write);
+    cnt = std::min(line_len, e_buf->buf_size - e_buf->write);
     memcpy(e_buf->buf + e_buf->write, line, cnt);
     if (cnt < line_len) {
         memcpy(e_buf->buf, line + cnt, line_len - cnt);
@@ -154,7 +154,7 @@
 }
 
 /* Log directly to the specified log */
-static void do_log_line(struct log_info *log_info, char *line) {
+static void do_log_line(struct log_info* log_info, const char* line) {
     if (log_info->log_target & LOG_KLOG) {
         klog_write(6, log_info->klog_fmt, line);
     }
@@ -169,7 +169,7 @@
 /* Log to either the abbreviated buf, or directly to the specified log
  * via do_log_line() above.
  */
-static void log_line(struct log_info *log_info, char *line, int len) {
+static void log_line(struct log_info* log_info, char* line, int len) {
     if (log_info->abbreviated) {
         add_line_to_abbr_buf(&log_info->a_buf, line, len);
     } else {
@@ -184,9 +184,8 @@
  * than buf_size (the usable size of the buffer) to make sure there is
  * room to temporarily stuff a null byte to terminate a line for logging.
  */
-static void print_buf_lines(struct log_info *log_info, char *buf, int buf_size)
-{
-    char *line_start;
+static void print_buf_lines(struct log_info* log_info, char* buf, int buf_size) {
+    char* line_start;
     char c;
     int i;
 
@@ -212,17 +211,17 @@
      */
 }
 
-static void init_abbr_buf(struct abbr_buf *a_buf) {
-    char *new_buf;
+static void init_abbr_buf(struct abbr_buf* a_buf) {
+    char* new_buf;
 
     memset(a_buf, 0, sizeof(struct abbr_buf));
-    new_buf = malloc(BEGINNING_BUF_SIZE);
+    new_buf = static_cast<char*>(malloc(BEGINNING_BUF_SIZE));
     if (new_buf) {
         a_buf->b_buf.buf = new_buf;
         a_buf->b_buf.alloc_len = BEGINNING_BUF_SIZE;
         a_buf->b_buf.buf_size = BEGINNING_BUF_SIZE - 1;
     }
-    new_buf = malloc(ENDING_BUF_SIZE);
+    new_buf = static_cast<char*>(malloc(ENDING_BUF_SIZE));
     if (new_buf) {
         a_buf->e_buf.buf = new_buf;
         a_buf->e_buf.alloc_len = ENDING_BUF_SIZE;
@@ -230,23 +229,22 @@
     }
 }
 
-static void free_abbr_buf(struct abbr_buf *a_buf) {
+static void free_abbr_buf(struct abbr_buf* a_buf) {
     free(a_buf->b_buf.buf);
     free(a_buf->e_buf.buf);
 }
 
-static void add_line_to_abbr_buf(struct abbr_buf *a_buf, char *linebuf, int linelen) {
+static void add_line_to_abbr_buf(struct abbr_buf* a_buf, char* linebuf, int linelen) {
     if (!a_buf->beginning_buf_full) {
-        a_buf->beginning_buf_full =
-            add_line_to_linear_buf(&a_buf->b_buf, linebuf, linelen);
+        a_buf->beginning_buf_full = add_line_to_linear_buf(&a_buf->b_buf, linebuf, linelen);
     }
     if (a_buf->beginning_buf_full) {
         add_line_to_circular_buf(&a_buf->e_buf, linebuf, linelen);
     }
 }
 
-static void print_abbr_buf(struct log_info *log_info) {
-    struct abbr_buf *a_buf = &log_info->a_buf;
+static void print_abbr_buf(struct log_info* log_info) {
+    struct abbr_buf* a_buf = &log_info->a_buf;
 
     /* Add the abbreviated output to the kernel log */
     if (a_buf->b_buf.alloc_len) {
@@ -269,14 +267,13 @@
      * and then cal print_buf_lines on it */
     if (a_buf->e_buf.read < a_buf->e_buf.write) {
         /* no wrap around, just print it */
-        print_buf_lines(log_info, a_buf->e_buf.buf + a_buf->e_buf.read,
-                        a_buf->e_buf.used_len);
+        print_buf_lines(log_info, a_buf->e_buf.buf + a_buf->e_buf.read, a_buf->e_buf.used_len);
     } else {
         /* The circular buffer will always have at least 1 byte unused,
          * so by allocating alloc_len here we will have at least
          * 1 byte of space available as required by print_buf_lines().
          */
-        char * nbuf = malloc(a_buf->e_buf.alloc_len);
+        char* nbuf = static_cast<char*>(malloc(a_buf->e_buf.alloc_len));
         if (!nbuf) {
             return;
         }
@@ -289,15 +286,54 @@
     }
 }
 
-static int parent(const char *tag, int parent_read, pid_t pid,
-        int *chld_sts, int log_target, bool abbreviated, char *file_path) {
+static void signal_handler(int signal_num);
+
+static void block_signals(sigset_t* oldset) {
+    sigset_t blockset;
+
+    sigemptyset(&blockset);
+    sigaddset(&blockset, SIGINT);
+    sigaddset(&blockset, SIGQUIT);
+    sigaddset(&blockset, SIGHUP);
+    pthread_sigmask(SIG_BLOCK, &blockset, oldset);
+}
+
+static void unblock_signals(sigset_t* oldset) {
+    pthread_sigmask(SIG_SETMASK, oldset, nullptr);
+}
+
+static void setup_signal_handlers(pid_t pid) {
+    struct sigaction handler = {.sa_handler = signal_handler};
+
+    child_pid = pid;
+    sigaction(SIGINT, &handler, &old_int);
+    sigaction(SIGQUIT, &handler, &old_quit);
+    sigaction(SIGHUP, &handler, &old_hup);
+}
+
+static void restore_signal_handlers() {
+    sigaction(SIGINT, &old_int, nullptr);
+    sigaction(SIGQUIT, &old_quit, nullptr);
+    sigaction(SIGHUP, &old_hup, nullptr);
+    child_pid = 0;
+}
+
+static void signal_handler(int signal_num) {
+    if (child_pid == 0 || kill(child_pid, signal_num) != 0) {
+        restore_signal_handlers();
+        raise(signal_num);
+    }
+}
+
+static int parent(const char* tag, int parent_read, pid_t pid, int* chld_sts, int log_target,
+                  bool abbreviated, const char* file_path, bool forward_signals) {
     int status = 0;
     char buffer[4096];
     struct pollfd poll_fds[] = {
-        [0] = {
-            .fd = parent_read,
-            .events = POLLIN,
-        },
+            {
+                    .fd = parent_read,
+                    .events = POLLIN,
+            },
     };
     int rc = 0;
     int fd;
@@ -308,11 +344,16 @@
     int b = 0;  // end index of unprocessed data
     int sz;
     bool found_child = false;
+    // There is a very small chance that opening child_ptty in the child will fail, but in this case
+    // POLLHUP will not be generated below.  Therefore, we use a 1 second timeout for poll() until
+    // we receive a message from child_ptty.  If this times out, we call waitpid() with WNOHANG to
+    // check the status of the child process and exit appropriately if it has terminated.
+    bool received_messages = false;
     char tmpbuf[256];
 
     log_info.btag = basename(tag);
     if (!log_info.btag) {
-        log_info.btag = (char*) tag;
+        log_info.btag = tag;
     }
 
     if (abbreviated && (log_target == LOG_NONE)) {
@@ -323,8 +364,8 @@
     }
 
     if (log_target & LOG_KLOG) {
-        snprintf(log_info.klog_fmt, sizeof(log_info.klog_fmt),
-                 "<6>%.*s: %%s\n", MAX_KLOG_TAG, log_info.btag);
+        snprintf(log_info.klog_fmt, sizeof(log_info.klog_fmt), "<6>%.*s: %%s\n", MAX_KLOG_TAG,
+                 log_info.btag);
     }
 
     if ((log_target & LOG_FILE) && !file_path) {
@@ -347,15 +388,16 @@
     log_info.abbreviated = abbreviated;
 
     while (!found_child) {
-        if (TEMP_FAILURE_RETRY(poll(poll_fds, ARRAY_SIZE(poll_fds), -1)) < 0) {
+        int timeout = received_messages ? -1 : 1000;
+        if (TEMP_FAILURE_RETRY(poll(poll_fds, arraysize(poll_fds), timeout)) < 0) {
             ERROR("poll failed\n");
             rc = -1;
             goto err_poll;
         }
 
         if (poll_fds[0].revents & POLLIN) {
-            sz = TEMP_FAILURE_RETRY(
-                read(parent_read, &buffer[b], sizeof(buffer) - 1 - b));
+            received_messages = true;
+            sz = TEMP_FAILURE_RETRY(read(parent_read, &buffer[b], sizeof(buffer) - 1 - b));
 
             sz += b;
             // Log one line at a time
@@ -396,10 +438,20 @@
             }
         }
 
-        if (poll_fds[0].revents & POLLHUP) {
+        if (!received_messages || (poll_fds[0].revents & POLLHUP)) {
             int ret;
+            sigset_t oldset;
 
-            ret = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0));
+            if (forward_signals) {
+                // Our signal handlers forward these signals to 'child_pid', but waitpid() may reap
+                // the child, so we must block these signals until we either 1) conclude that the
+                // child is still running or 2) determine the child has been reaped and we have
+                // reset the signals to their original disposition.
+                block_signals(&oldset);
+            }
+
+            int flags = (poll_fds[0].revents & POLLHUP) ? 0 : WNOHANG;
+            ret = TEMP_FAILURE_RETRY(waitpid(pid, &status, flags));
             if (ret < 0) {
                 rc = errno;
                 ALOG(LOG_ERROR, "logwrap", "waitpid failed with %s\n", strerror(errno));
@@ -408,22 +460,29 @@
             if (ret > 0) {
                 found_child = true;
             }
+
+            if (forward_signals) {
+                if (found_child) {
+                    restore_signal_handlers();
+                }
+                unblock_signals(&oldset);
+            }
         }
     }
 
-    if (chld_sts != NULL) {
+    if (chld_sts != nullptr) {
         *chld_sts = status;
     } else {
-      if (WIFEXITED(status))
-        rc = WEXITSTATUS(status);
-      else
-        rc = -ECHILD;
+        if (WIFEXITED(status))
+            rc = WEXITSTATUS(status);
+        else
+            rc = -ECHILD;
     }
 
     // Flush remaining data
     if (a != b) {
-      buffer[b] = '\0';
-      log_line(&log_info, &buffer[a], b - a);
+        buffer[b] = '\0';
+        log_line(&log_info, &buffer[a], b - a);
     }
 
     /* All the output has been processed, time to dump the abbreviated output */
@@ -432,21 +491,21 @@
     }
 
     if (WIFEXITED(status)) {
-      if (WEXITSTATUS(status)) {
-        snprintf(tmpbuf, sizeof(tmpbuf),
-                 "%s terminated by exit(%d)\n", log_info.btag, WEXITSTATUS(status));
-        do_log_line(&log_info, tmpbuf);
-      }
+        if (WEXITSTATUS(status)) {
+            snprintf(tmpbuf, sizeof(tmpbuf), "%s terminated by exit(%d)\n", log_info.btag,
+                     WEXITSTATUS(status));
+            do_log_line(&log_info, tmpbuf);
+        }
     } else {
-      if (WIFSIGNALED(status)) {
-        snprintf(tmpbuf, sizeof(tmpbuf),
-                       "%s terminated by signal %d\n", log_info.btag, WTERMSIG(status));
-        do_log_line(&log_info, tmpbuf);
-      } else if (WIFSTOPPED(status)) {
-        snprintf(tmpbuf, sizeof(tmpbuf),
-                       "%s stopped by signal %d\n", log_info.btag, WSTOPSIG(status));
-        do_log_line(&log_info, tmpbuf);
-      }
+        if (WIFSIGNALED(status)) {
+            snprintf(tmpbuf, sizeof(tmpbuf), "%s terminated by signal %d\n", log_info.btag,
+                     WTERMSIG(status));
+            do_log_line(&log_info, tmpbuf);
+        } else if (WIFSTOPPED(status)) {
+            snprintf(tmpbuf, sizeof(tmpbuf), "%s stopped by signal %d\n", log_info.btag,
+                     WSTOPSIG(status));
+            do_log_line(&log_info, tmpbuf);
+        }
     }
 
 err_waitpid:
@@ -460,33 +519,24 @@
     return rc;
 }
 
-static void child(int argc, char* argv[]) {
+static void child(int argc, const char* const* argv) {
     // create null terminated argv_child array
     char* argv_child[argc + 1];
-    memcpy(argv_child, argv, argc * sizeof(char *));
-    argv_child[argc] = NULL;
+    memcpy(argv_child, argv, argc * sizeof(char*));
+    argv_child[argc] = nullptr;
 
     if (execvp(argv_child[0], argv_child)) {
-        FATAL_CHILD("executing %s failed: %s\n", argv_child[0],
-                strerror(errno));
+        FATAL_CHILD("executing %s failed: %s\n", argv_child[0], strerror(errno));
     }
 }
 
-int android_fork_execvp_ext(int argc, char* argv[], int *status, bool ignore_int_quit,
-        int log_target, bool abbreviated, char *file_path,
-        void *unused_opts, int unused_opts_len) {
+int logwrap_fork_execvp(int argc, const char* const* argv, int* status, bool forward_signals,
+                        int log_target, bool abbreviated, const char* file_path) {
     pid_t pid;
     int parent_ptty;
-    int child_ptty;
-    struct sigaction intact;
-    struct sigaction quitact;
-    sigset_t blockset;
     sigset_t oldset;
     int rc = 0;
 
-    LOG_ALWAYS_FATAL_IF(unused_opts != NULL);
-    LOG_ALWAYS_FATAL_IF(unused_opts_len != 0);
-
     rc = pthread_mutex_lock(&fd_mutex);
     if (rc) {
         ERROR("failed to lock signal_fd mutex\n");
@@ -494,7 +544,7 @@
     }
 
     /* Use ptty instead of socketpair so that STDOUT is not buffered */
-    parent_ptty = TEMP_FAILURE_RETRY(open("/dev/ptmx", O_RDWR));
+    parent_ptty = TEMP_FAILURE_RETRY(posix_openpt(O_RDWR | O_CLOEXEC));
     if (parent_ptty < 0) {
         ERROR("Cannot create parent ptty\n");
         rc = -1;
@@ -503,33 +553,34 @@
 
     char child_devname[64];
     if (grantpt(parent_ptty) || unlockpt(parent_ptty) ||
-            ptsname_r(parent_ptty, child_devname, sizeof(child_devname)) != 0) {
+        ptsname_r(parent_ptty, child_devname, sizeof(child_devname)) != 0) {
         ERROR("Problem with /dev/ptmx\n");
         rc = -1;
         goto err_ptty;
     }
 
-    child_ptty = TEMP_FAILURE_RETRY(open(child_devname, O_RDWR));
-    if (child_ptty < 0) {
-        ERROR("Cannot open child_ptty\n");
-        rc = -1;
-        goto err_child_ptty;
+    if (forward_signals) {
+        // Block these signals until we have the child pid and our signal handlers set up.
+        block_signals(&oldset);
     }
 
-    sigemptyset(&blockset);
-    sigaddset(&blockset, SIGINT);
-    sigaddset(&blockset, SIGQUIT);
-    pthread_sigmask(SIG_BLOCK, &blockset, &oldset);
-
     pid = fork();
     if (pid < 0) {
-        close(child_ptty);
         ERROR("Failed to fork\n");
         rc = -1;
         goto err_fork;
     } else if (pid == 0) {
         pthread_mutex_unlock(&fd_mutex);
-        pthread_sigmask(SIG_SETMASK, &oldset, NULL);
+        if (forward_signals) {
+            unblock_signals(&oldset);
+        }
+
+        setsid();
+
+        int child_ptty = TEMP_FAILURE_RETRY(open(child_devname, O_RDWR | O_CLOEXEC));
+        if (child_ptty < 0) {
+            FATAL_CHILD("Cannot open child_ptty: %s\n", strerror(errno));
+        }
         close(parent_ptty);
 
         dup2(child_ptty, 1);
@@ -538,27 +589,23 @@
 
         child(argc, argv);
     } else {
-        close(child_ptty);
-        if (ignore_int_quit) {
-            struct sigaction ignact;
-
-            memset(&ignact, 0, sizeof(ignact));
-            ignact.sa_handler = SIG_IGN;
-            sigaction(SIGINT, &ignact, &intact);
-            sigaction(SIGQUIT, &ignact, &quitact);
+        if (forward_signals) {
+            setup_signal_handlers(pid);
+            unblock_signals(&oldset);
         }
 
-        rc = parent(argv[0], parent_ptty, pid, status, log_target,
-                    abbreviated, file_path);
+        rc = parent(argv[0], parent_ptty, pid, status, log_target, abbreviated, file_path,
+                    forward_signals);
+
+        if (forward_signals) {
+            restore_signal_handlers();
+        }
     }
 
-    if (ignore_int_quit) {
-        sigaction(SIGINT, &intact, NULL);
-        sigaction(SIGQUIT, &quitact, NULL);
-    }
 err_fork:
-    pthread_sigmask(SIG_SETMASK, &oldset, NULL);
-err_child_ptty:
+    if (forward_signals) {
+        unblock_signals(&oldset);
+    }
 err_ptty:
     close(parent_ptty);
 err_open:
diff --git a/logwrapper/android_fork_execvp_ext_benchmark.cpp b/logwrapper/logwrap_fork_execvp_benchmark.cpp
similarity index 81%
rename from logwrapper/android_fork_execvp_ext_benchmark.cpp
rename to logwrapper/logwrap_fork_execvp_benchmark.cpp
index 1abd932..b2d0c71 100644
--- a/logwrapper/android_fork_execvp_ext_benchmark.cpp
+++ b/logwrapper/logwrap_fork_execvp_benchmark.cpp
@@ -23,9 +23,7 @@
     const char* argv[] = {"/system/bin/echo", "hello", "world"};
     const int argc = 3;
     while (state.KeepRunning()) {
-        int rc = android_fork_execvp_ext(
-            argc, (char**)argv, NULL /* status */, false /* ignore_int_quit */, LOG_NONE,
-            false /* abbreviated */, NULL /* file_path */, NULL /* opts */, 0 /* opts_len */);
+        int rc = logwrap_fork_execvp(argc, argv, nullptr, false, LOG_NONE, false, nullptr);
         CHECK_EQ(0, rc);
     }
 }
diff --git a/logwrapper/logwrapper.c b/logwrapper/logwrapper.cpp
similarity index 62%
rename from logwrapper/logwrapper.c
rename to logwrapper/logwrapper.cpp
index 33454c6..7118d12 100644
--- a/logwrapper/logwrapper.c
+++ b/logwrapper/logwrapper.cpp
@@ -24,27 +24,26 @@
 #include <log/log.h>
 #include <logwrap/logwrap.h>
 
-void fatal(const char *msg) {
+void fatal(const char* msg) {
     fprintf(stderr, "%s", msg);
     ALOG(LOG_ERROR, "logwrapper", "%s", msg);
     exit(-1);
 }
 
 void usage() {
-    fatal(
-        "Usage: logwrapper [-a] [-d] [-k] BINARY [ARGS ...]\n"
-        "\n"
-        "Forks and executes BINARY ARGS, redirecting stdout and stderr to\n"
-        "the Android logging system. Tag is set to BINARY, priority is\n"
-        "always LOG_INFO.\n"
-        "\n"
-        "-a: Causes logwrapper to do abbreviated logging.\n"
-        "    This logs up to the first 4K and last 4K of the command\n"
-        "    being run, and logs the output when the command exits\n"
-        "-d: Causes logwrapper to SIGSEGV when BINARY terminates\n"
-        "    fault address is set to the status of wait()\n"
-        "-k: Causes logwrapper to log to the kernel log instead of\n"
-        "    the Android system log\n");
+    fatal("Usage: logwrapper [-a] [-d] [-k] BINARY [ARGS ...]\n"
+          "\n"
+          "Forks and executes BINARY ARGS, redirecting stdout and stderr to\n"
+          "the Android logging system. Tag is set to BINARY, priority is\n"
+          "always LOG_INFO.\n"
+          "\n"
+          "-a: Causes logwrapper to do abbreviated logging.\n"
+          "    This logs up to the first 4K and last 4K of the command\n"
+          "    being run, and logs the output when the command exits\n"
+          "-d: Causes logwrapper to SIGSEGV when BINARY terminates\n"
+          "    fault address is set to the status of wait()\n"
+          "-k: Causes logwrapper to log to the kernel log instead of\n"
+          "    the Android system log\n");
 }
 
 int main(int argc, char* argv[]) {
@@ -69,7 +68,7 @@
                 break;
             case '?':
             default:
-              usage();
+                usage();
         }
     }
     argc -= optind;
@@ -79,8 +78,7 @@
         usage();
     }
 
-    rc = android_fork_execvp_ext(argc, &argv[0], &status, true,
-                                 log_target, abbreviated, NULL, NULL, 0);
+    rc = logwrap_fork_execvp(argc, &argv[0], &status, true, log_target, abbreviated, nullptr);
     if (!rc) {
         if (WIFEXITED(status))
             rc = WEXITSTATUS(status);
@@ -89,8 +87,8 @@
     }
 
     if (seg_fault_on_exit) {
-        uintptr_t fault_address = (uintptr_t) status;
-        *(int *) fault_address = 0;  // causes SIGSEGV with fault_address = status
+        uintptr_t fault_address = (uintptr_t)status;
+        *(int*)fault_address = 0;  // causes SIGSEGV with fault_address = status
     }
 
     return rc;
diff --git a/property_service/libpropertyinfoserializer/Android.bp b/property_service/libpropertyinfoserializer/Android.bp
index 51c1226..aa02a3a 100644
--- a/property_service/libpropertyinfoserializer/Android.bp
+++ b/property_service/libpropertyinfoserializer/Android.bp
@@ -1,7 +1,6 @@
 cc_defaults {
     name: "propertyinfoserializer_defaults",
     host_supported: true,
-    vendor_available: true,
     cpp_std: "experimental",
     cppflags: [
         "-Wall",
@@ -9,8 +8,8 @@
         "-Werror",
     ],
     static_libs: [
-        "libpropertyinfoparser",
         "libbase",
+        "libpropertyinfoparser",
     ],
 }
 
diff --git a/property_service/libpropertyinfoserializer/include/property_info_serializer/property_info_serializer.h b/property_service/libpropertyinfoserializer/include/property_info_serializer/property_info_serializer.h
index 439813d..dfb1d11 100644
--- a/property_service/libpropertyinfoserializer/include/property_info_serializer/property_info_serializer.h
+++ b/property_service/libpropertyinfoserializer/include/property_info_serializer/property_info_serializer.h
@@ -14,8 +14,7 @@
 // limitations under the License.
 //
 
-#ifndef PROPERTY_INFO_SERIALIZER_H
-#define PROPERTY_INFO_SERIALIZER_H
+#pragma once
 
 #include <string>
 #include <vector>
@@ -41,11 +40,9 @@
                const std::string& default_context, const std::string& default_type,
                std::string* serialized_trie, std::string* error);
 
-void ParsePropertyInfoFile(const std::string& file_contents,
+void ParsePropertyInfoFile(const std::string& file_contents, bool require_prefix_or_exact,
                            std::vector<PropertyInfoEntry>* property_infos,
                            std::vector<std::string>* errors);
 
 }  // namespace properties
 }  // namespace android
-
-#endif
diff --git a/property_service/libpropertyinfoserializer/property_info_file.cpp b/property_service/libpropertyinfoserializer/property_info_file.cpp
index 2cdc62d..771a9ce 100644
--- a/property_service/libpropertyinfoserializer/property_info_file.cpp
+++ b/property_service/libpropertyinfoserializer/property_info_file.cpp
@@ -56,7 +56,8 @@
   return false;
 }
 
-bool ParsePropertyInfoLine(const std::string& line, PropertyInfoEntry* out, std::string* error) {
+bool ParsePropertyInfoLine(const std::string& line, bool require_prefix_or_exact,
+                           PropertyInfoEntry* out, std::string* error) {
   auto tokenizer = SpaceTokenizer(line);
 
   auto property = tokenizer.GetNext();
@@ -72,7 +73,7 @@
   }
 
   // It is not an error to not find exact_match or a type, as older files will not contain them.
-  auto exact_match = tokenizer.GetNext();
+  auto match_operation = tokenizer.GetNext();
   // We reformat type to be space deliminated regardless of the input whitespace for easier storage
   // and subsequent parsing.
   auto type_strings = std::vector<std::string>{};
@@ -82,18 +83,27 @@
     type = tokenizer.GetNext();
   }
 
+  bool exact_match = false;
+  if (match_operation == "exact") {
+    exact_match = true;
+  } else if (match_operation != "prefix" && match_operation != "" && require_prefix_or_exact) {
+    *error = "Match operation '" + match_operation +
+             "' is not valid: must be either 'prefix' or 'exact'";
+    return false;
+  }
+
   if (!type_strings.empty() && !IsTypeValid(type_strings)) {
     *error = "Type '" + Join(type_strings, " ") + "' is not valid";
     return false;
   }
 
-  *out = {property, context, Join(type_strings, " "), exact_match == "exact"};
+  *out = {property, context, Join(type_strings, " "), exact_match};
   return true;
 }
 
 }  // namespace
 
-void ParsePropertyInfoFile(const std::string& file_contents,
+void ParsePropertyInfoFile(const std::string& file_contents, bool require_prefix_or_exact,
                            std::vector<PropertyInfoEntry>* property_infos,
                            std::vector<std::string>* errors) {
   // Do not clear property_infos to allow this function to be called on multiple files, with
@@ -108,7 +118,8 @@
 
     auto property_info_entry = PropertyInfoEntry{};
     auto parse_error = std::string{};
-    if (!ParsePropertyInfoLine(trimmed_line, &property_info_entry, &parse_error)) {
+    if (!ParsePropertyInfoLine(trimmed_line, require_prefix_or_exact, &property_info_entry,
+                               &parse_error)) {
       errors->emplace_back(parse_error);
       continue;
     }
diff --git a/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp b/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp
index 33da1f1..f4a846f 100644
--- a/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp
+++ b/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp
@@ -375,9 +375,11 @@
       {"audio_hal.period_size", "u:object_r:default_prop:s0"},
       {"bluetooth.enable_timeout_ms", "u:object_r:bluetooth_prop:s0"},
       {"dalvik.vm.appimageformat", "u:object_r:dalvik_prop:s0"},
+      {"dalvik.vm.boot-dex2oat-cpu-set", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.boot-dex2oat-threads", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.dex2oat-Xms", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.dex2oat-Xmx", "u:object_r:dalvik_prop:s0"},
+      {"dalvik.vm.dex2oat-cpu-set", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.dex2oat-threads", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.dexopt.secondary", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.heapgrowthlimit", "u:object_r:dalvik_prop:s0"},
@@ -388,6 +390,7 @@
       {"dalvik.vm.heaptargetutilization", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.image-dex2oat-Xms", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.image-dex2oat-Xmx", "u:object_r:dalvik_prop:s0"},
+      {"dalvik.vm.image-dex2oat-cpu-set", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.image-dex2oat-threads", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.isa.arm.features", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.isa.arm.variant", "u:object_r:dalvik_prop:s0"},
diff --git a/property_service/property_info_checker/property_info_checker.cpp b/property_service/property_info_checker/property_info_checker.cpp
index 52c4383..61b368e 100644
--- a/property_service/property_info_checker/property_info_checker.cpp
+++ b/property_service/property_info_checker/property_info_checker.cpp
@@ -153,7 +153,7 @@
     }
 
     auto errors = std::vector<std::string>{};
-    ParsePropertyInfoFile(file_contents, &property_info_entries, &errors);
+    ParsePropertyInfoFile(file_contents, true, &property_info_entries, &errors);
     if (!errors.empty()) {
       for (const auto& error : errors) {
         std::cerr << "Could not read line from '" << filename << "': " << error << std::endl;
diff --git a/reboot/Android.bp b/reboot/Android.bp
index 805fd9a..cc71723 100644
--- a/reboot/Android.bp
+++ b/reboot/Android.bp
@@ -5,4 +5,5 @@
     srcs: ["reboot.c"],
     shared_libs: ["libcutils"],
     cflags: ["-Werror"],
+    recovery_available: true,
 }
diff --git a/libmeminfo/vts/Android.bp b/rootdir/Android.bp
similarity index 68%
rename from libmeminfo/vts/Android.bp
rename to rootdir/Android.bp
index 5a3a23b..96b5e0d 100644
--- a/libmeminfo/vts/Android.bp
+++ b/rootdir/Android.bp
@@ -1,4 +1,4 @@
-// Copyright (C) 2019 The Android Open Source Project
+// Copyright 2019 The Android Open Source Project
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -12,9 +12,15 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-cc_test {
-    name: "vts_meminfo_test",
-    defaults: ["libmeminfo_defaults"],
-    srcs: ["vts_meminfo_test.cpp"],
-    static_libs: ["libmeminfo"],
+prebuilt_etc {
+    name: "init.rc",
+    src: "init.rc",
+    sub_dir: "init/hw",
+    required: ["fsverity_init"],
+}
+
+prebuilt_etc {
+    name: "ueventd.rc",
+    src: "ueventd.rc",
+    recovery_available: true,
 }
diff --git a/rootdir/Android.mk b/rootdir/Android.mk
index 4559050..ebc0cde 100644
--- a/rootdir/Android.mk
+++ b/rootdir/Android.mk
@@ -1,22 +1,6 @@
 LOCAL_PATH:= $(call my-dir)
 
 #######################################
-# init.rc
-include $(CLEAR_VARS)
-
-LOCAL_MODULE := init.rc
-LOCAL_SRC_FILES := $(LOCAL_MODULE)
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT)
-LOCAL_REQUIRED_MODULES := fsverity_init
-
-# The init symlink must be a post install command of a file that is to TARGET_ROOT_OUT.
-# Since init.rc is required for init and satisfies that requirement, we hijack it to create the symlink.
-LOCAL_POST_INSTALL_CMD := ln -sf /system/bin/init $(TARGET_ROOT_OUT)/init
-
-include $(BUILD_PREBUILT)
-
-#######################################
 # init-debug.rc
 include $(CLEAR_VARS)
 
@@ -58,15 +42,6 @@
 endif
 
 #######################################
-# fsverity_init
-
-include $(CLEAR_VARS)
-LOCAL_MODULE:= fsverity_init
-LOCAL_MODULE_CLASS := EXECUTABLES
-LOCAL_SRC_FILES := fsverity_init.sh
-include $(BUILD_PREBUILT)
-
-#######################################
 # init.environ.rc
 
 include $(CLEAR_VARS)
@@ -97,11 +72,12 @@
 #
 # create some directories (some are mount points) and symlinks
 LOCAL_POST_INSTALL_CMD := mkdir -p $(addprefix $(TARGET_ROOT_OUT)/, \
-    dev proc sys system data odm oem acct config storage mnt apex debug_ramdisk $(BOARD_ROOT_EXTRA_FOLDERS)); \
+    dev proc sys system data odm oem acct config storage mnt apex debug_ramdisk \
+    linkerconfig $(BOARD_ROOT_EXTRA_FOLDERS)); \
     ln -sf /system/bin $(TARGET_ROOT_OUT)/bin; \
     ln -sf /system/etc $(TARGET_ROOT_OUT)/etc; \
     ln -sf /data/user_de/0/com.android.shell/files/bugreports $(TARGET_ROOT_OUT)/bugreports; \
-    ln -sf /sys/kernel/debug $(TARGET_ROOT_OUT)/d; \
+    ln -sfn /sys/kernel/debug $(TARGET_ROOT_OUT)/d; \
     ln -sf /storage/self/primary $(TARGET_ROOT_OUT)/sdcard
 ifdef BOARD_USES_VENDORIMAGE
   LOCAL_POST_INSTALL_CMD += ; mkdir -p $(TARGET_ROOT_OUT)/vendor
@@ -157,6 +133,10 @@
   LOCAL_POST_INSTALL_CMD += ; mkdir -p $(TARGET_ROOT_OUT)/postinstall
 endif
 
+# The init symlink must be a post install command of a file that is to TARGET_ROOT_OUT.
+# Since init.environ.rc is required for init and satisfies that requirement, we hijack it to create the symlink.
+LOCAL_POST_INSTALL_CMD += ; ln -sf /system/bin/init $(TARGET_ROOT_OUT)/init
+
 include $(BUILD_SYSTEM)/base_rules.mk
 
 $(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/init.environ.rc.in
@@ -214,7 +194,7 @@
 LOCAL_MODULE_CLASS := ETC
 LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
 
-# Start of runtime APEX compatibility.
+# Start of i18n and ART APEX compatibility.
 #
 # Meta-comment:
 # The placing of this section is somewhat arbitrary. The LOCAL_POST_INSTALL_CMD
@@ -226,42 +206,29 @@
 # come to rely on them.
 
 # http://b/121248172 - create a link from /system/usr/icu to
-# /apex/com.android.runtime/etc/icu so that apps can find the ICU .dat file.
+# /apex/com.android.i18n/etc/icu so that apps can find the ICU .dat file.
 # A symlink can't overwrite a directory and the /system/usr/icu directory once
 # existed so the required structure must be created whatever we find.
 LOCAL_POST_INSTALL_CMD = mkdir -p $(TARGET_OUT)/usr && rm -rf $(TARGET_OUT)/usr/icu
 LOCAL_POST_INSTALL_CMD += && ln -sf /apex/com.android.i18n/etc/icu $(TARGET_OUT)/usr/icu
 
 # TODO(b/124106384): Clean up compat symlinks for ART binaries.
-ART_BINARIES := \
-  dalvikvm \
-  dalvikvm32 \
-  dalvikvm64 \
-  dex2oat \
-  dexdiag \
-  dexdump \
-  dexlist \
-  dexoptanalyzer \
-  oatdump \
-  profman \
-
+ART_BINARIES := dalvikvm dex2oat
 LOCAL_POST_INSTALL_CMD += && mkdir -p $(TARGET_OUT)/bin
 $(foreach b,$(ART_BINARIES), \
   $(eval LOCAL_POST_INSTALL_CMD += \
-    && ln -sf /apex/com.android.runtime/bin/$(b) $(TARGET_OUT)/bin/$(b)) \
+    && ln -sf /apex/com.android.art/bin/$(b) $(TARGET_OUT)/bin/$(b)) \
 )
 
-# End of runtime APEX compatibilty.
+# End of i18n and ART APEX compatibilty.
 
 ifeq ($(_enforce_vndk_at_runtime),true)
 
 # for VNDK enforced devices
-LOCAL_MODULE_STEM := $(call append_vndk_version,$(LOCAL_MODULE))
-include $(BUILD_SYSTEM)/base_rules.mk
-ld_config_template := $(LOCAL_PATH)/etc/ld.config.txt
-check_backward_compatibility := true
-vndk_version := $(PLATFORM_VNDK_VERSION)
-include $(LOCAL_PATH)/update_and_install_ld_config.mk
+# This file will be replaced with dynamically generated one from system/linkerconfig
+LOCAL_MODULE_STEM := $(LOCAL_MODULE)
+LOCAL_SRC_FILES := etc/ld.config.txt
+include $(BUILD_PREBUILT)
 
 else ifeq ($(_enforce_vndk_lite_at_runtime),true)
 
@@ -282,36 +249,6 @@
 
 endif  # ifeq ($(_enforce_vndk_at_runtime),true)
 
-# ld.config.txt for VNDK versions older than PLATFORM_VNDK_VERSION
-# are built with the VNDK libraries lists under /prebuilts/vndk.
-#
-# ld.config.$(VER).txt is built and installed for all VNDK versions
-# listed in PRODUCT_EXTRA_VNDK_VERSIONS.
-#
-# $(1): VNDK version
-define build_versioned_ld_config
-include $(CLEAR_VARS)
-LOCAL_MODULE := ld.config.$(1).txt
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
-LOCAL_MODULE_STEM := $$(LOCAL_MODULE)
-include $(BUILD_SYSTEM)/base_rules.mk
-ld_config_template := $(LOCAL_PATH)/etc/ld.config.txt
-check_backward_compatibility := true
-vndk_version := $(1)
-lib_list_from_prebuilts := true
-include $(LOCAL_PATH)/update_and_install_ld_config.mk
-endef
-
-vndk_snapshots := $(wildcard prebuilts/vndk/*)
-supported_vndk_snapshot_versions := \
-  $(strip $(patsubst prebuilts/vndk/v%,%,$(vndk_snapshots)))
-$(foreach ver,$(supported_vndk_snapshot_versions),\
-  $(eval $(call build_versioned_ld_config,$(ver))))
-
-vndk_snapshots :=
-supported_vndk_snapshot_versions :=
-
 #######################################
 # ld.config.vndk_lite.txt
 #
@@ -346,70 +283,6 @@
 include $(BUILD_PREBUILT)
 
 #######################################
-# llndk.libraries.txt
-include $(CLEAR_VARS)
-LOCAL_MODULE := llndk.libraries.txt
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
-LOCAL_MODULE_STEM := $(call append_vndk_version,$(LOCAL_MODULE))
-include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_LLNDK_LIBRARIES := $(LLNDK_LIBRARIES)
-$(LOCAL_BUILT_MODULE):
-	@echo "Generate: $@"
-	@mkdir -p $(dir $@)
-	$(hide) echo -n > $@
-	$(hide) $(foreach lib,$(PRIVATE_LLNDK_LIBRARIES), \
-		echo $(lib).so >> $@;)
-
-#######################################
-# vndksp.libraries.txt
-include $(CLEAR_VARS)
-LOCAL_MODULE := vndksp.libraries.txt
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
-LOCAL_MODULE_STEM := $(call append_vndk_version,$(LOCAL_MODULE))
-include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_VNDK_SAMEPROCESS_LIBRARIES := $(VNDK_SAMEPROCESS_LIBRARIES)
-$(LOCAL_BUILT_MODULE):
-	@echo "Generate: $@"
-	@mkdir -p $(dir $@)
-	$(hide) echo -n > $@
-	$(hide) $(foreach lib,$(PRIVATE_VNDK_SAMEPROCESS_LIBRARIES), \
-		echo $(lib).so >> $@;)
-
-#######################################
-# vndkcore.libraries.txt
-include $(CLEAR_VARS)
-LOCAL_MODULE := vndkcore.libraries.txt
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
-LOCAL_MODULE_STEM := $(call append_vndk_version,$(LOCAL_MODULE))
-include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_VNDK_CORE_LIBRARIES := $(VNDK_CORE_LIBRARIES)
-$(LOCAL_BUILT_MODULE):
-	@echo "Generate: $@"
-	@mkdir -p $(dir $@)
-	$(hide) echo -n > $@
-	$(hide) $(foreach lib,$(PRIVATE_VNDK_CORE_LIBRARIES), \
-		echo $(lib).so >> $@;)
-
-#######################################
-# vndkprivate.libraries.txt
-include $(CLEAR_VARS)
-LOCAL_MODULE := vndkprivate.libraries.txt
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
-LOCAL_MODULE_STEM := $(call append_vndk_version,$(LOCAL_MODULE))
-include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_VNDK_PRIVATE_LIBRARIES := $(VNDK_PRIVATE_LIBRARIES)
-$(LOCAL_BUILT_MODULE):
-	@echo "Generate: $@"
-	@mkdir -p $(dir $@)
-	$(hide) echo -n > $@
-	$(hide) $(foreach lib,$(PRIVATE_VNDK_PRIVATE_LIBRARIES), \
-		echo $(lib).so >> $@;)
-
-#######################################
 # sanitizer.libraries.txt
 include $(CLEAR_VARS)
 LOCAL_MODULE := sanitizer.libraries.txt
diff --git a/rootdir/avb/Android.bp b/rootdir/avb/Android.bp
new file mode 100644
index 0000000..85d2786
--- /dev/null
+++ b/rootdir/avb/Android.bp
@@ -0,0 +1,20 @@
+filegroup {
+    name: "q-gsi_avbpubkey",
+    srcs: [
+        "q-gsi.avbpubkey",
+    ],
+}
+
+filegroup {
+    name: "r-gsi_avbpubkey",
+    srcs: [
+        "r-gsi.avbpubkey",
+    ],
+}
+
+filegroup {
+    name: "s-gsi_avbpubkey",
+    srcs: [
+        "s-gsi.avbpubkey",
+    ],
+}
diff --git a/rootdir/etc/ld.config.legacy.txt b/rootdir/etc/ld.config.legacy.txt
index f0b1fd2..a99756a 100644
--- a/rootdir/etc/ld.config.legacy.txt
+++ b/rootdir/etc/ld.config.legacy.txt
@@ -42,29 +42,29 @@
 # APEX related namespaces.
 ###############################################################################
 
-additional.namespaces = runtime,conscrypt,media,neuralnetworks,resolv
+additional.namespaces = art,conscrypt,media,neuralnetworks,resolv
 
 # Keep in sync with the "platform" namespace in art/build/apex/ld.config.txt.
 # If a shared library or an executable requests a shared library that
 # cannot be loaded into the default namespace, the dynamic linker tries
-# to load the shared library from the runtime namespace. And then, if the
-# shared library cannot be loaded from the runtime namespace either, the
+# to load the shared library from the art namespace. And then, if the
+# shared library cannot be loaded from the art namespace either, the
 # dynamic linker tries to load the shared library from the resolv namespace.
 # Finally, if all attempts fail, the dynamic linker returns an error.
-namespace.default.links = runtime,resolv,neuralnetworks
-namespace.default.asan.links = runtime,resolv,neuralnetworks
-namespace.default.link.runtime.shared_libs  = libandroidicu.so
-namespace.default.link.runtime.shared_libs += libdexfile_external.so
-namespace.default.link.runtime.shared_libs += libdexfiled_external.so
+namespace.default.links = art,resolv,neuralnetworks
+namespace.default.asan.links = art,resolv,neuralnetworks
+namespace.default.link.art.shared_libs  = libandroidicu.so
+namespace.default.link.art.shared_libs += libdexfile_external.so
+namespace.default.link.art.shared_libs += libdexfiled_external.so
 # TODO(b/120786417 or b/134659294): libicuuc.so and libicui18n.so are kept for app compat.
-namespace.default.link.runtime.shared_libs += libicui18n.so
-namespace.default.link.runtime.shared_libs += libicuuc.so
-namespace.default.link.runtime.shared_libs += libnativebridge.so
-namespace.default.link.runtime.shared_libs += libnativehelper.so
-namespace.default.link.runtime.shared_libs += libnativeloader.so
+namespace.default.link.art.shared_libs += libicui18n.so
+namespace.default.link.art.shared_libs += libicuuc.so
+namespace.default.link.art.shared_libs += libnativebridge.so
+namespace.default.link.art.shared_libs += libnativehelper.so
+namespace.default.link.art.shared_libs += libnativeloader.so
 
 # TODO(b/122876336): Remove libpac.so once it's migrated to Webview
-namespace.default.link.runtime.shared_libs += libpac.so
+namespace.default.link.art.shared_libs += libpac.so
 
 # When libnetd_resolv.so can't be found in the default namespace, search for it
 # in the resolv namespace. Don't allow any other libraries from the resolv namespace
@@ -75,24 +75,25 @@
 namespace.default.link.neuralnetworks.shared_libs = libneuralnetworks.so
 
 ###############################################################################
-# "runtime" APEX namespace
+# "art" APEX namespace
 #
-# This namespace exposes externally accessible libraries from the Runtime APEX.
-# Keep in sync with the "runtime" namespace in art/build/apex/ld.config.txt.
+# This namespace exposes externally accessible libraries from the ART APEX.
+# Keep in sync with the "art" namespace in art/build/apex/ld.config.txt.
 ###############################################################################
-namespace.runtime.isolated = true
+namespace.art.isolated = true
 # Visible to allow links to be created at runtime, e.g. through
 # android_link_namespaces in libnativeloader.
-namespace.runtime.visible = true
+namespace.art.visible = true
 
-namespace.runtime.search.paths = /apex/com.android.runtime/${LIB}
-namespace.runtime.asan.search.paths = /apex/com.android.runtime/${LIB}
-namespace.runtime.links = default
+namespace.art.search.paths = /apex/com.android.art/${LIB}
+namespace.art.asan.search.paths = /apex/com.android.art/${LIB}
+namespace.art.links = default,neuralnetworks
 # Need allow_all_shared_libs because libart.so can dlopen oat files in
 # /system/framework and /data.
 # TODO(b/130340935): Use a dynamically created linker namespace similar to
 # classloader-namespace for oat files, and tighten this up.
-namespace.runtime.link.default.allow_all_shared_libs = true
+namespace.art.link.default.allow_all_shared_libs = true
+namespace.art.link.neuralnetworks.shared_libs = libneuralnetworks.so
 
 ###############################################################################
 # "media" APEX namespace
@@ -135,8 +136,8 @@
 
 namespace.conscrypt.search.paths = /apex/com.android.conscrypt/${LIB}
 namespace.conscrypt.asan.search.paths = /apex/com.android.conscrypt/${LIB}
-namespace.conscrypt.links = runtime,default
-namespace.conscrypt.link.runtime.shared_libs  = libandroidio.so
+namespace.conscrypt.links = art,default
+namespace.conscrypt.link.art.shared_libs = libandroidio.so
 namespace.conscrypt.link.default.shared_libs  = libc.so
 namespace.conscrypt.link.default.shared_libs += libm.so
 namespace.conscrypt.link.default.shared_libs += libdl.so
@@ -178,6 +179,7 @@
 namespace.neuralnetworks.link.default.shared_libs += liblog.so
 namespace.neuralnetworks.link.default.shared_libs += libm.so
 namespace.neuralnetworks.link.default.shared_libs += libnativewindow.so
+namespace.neuralnetworks.link.default.shared_libs += libneuralnetworks_packageinfo.so
 namespace.neuralnetworks.link.default.shared_libs += libsync.so
 namespace.neuralnetworks.link.default.shared_libs += libvndksupport.so
 
diff --git a/rootdir/etc/ld.config.txt b/rootdir/etc/ld.config.txt
index 3321425..5c87843 100644
--- a/rootdir/etc/ld.config.txt
+++ b/rootdir/etc/ld.config.txt
@@ -1,799 +1,3 @@
-# Copyright (C) 2017 The Android Open Source Project
-#
-# Bionic loader config file.
-#
-
-# Don't change the order here. The first pattern that matches with the
-# absolute path of an executable is selected.
-dir.system = /system/bin/
-dir.system = /system/xbin/
-dir.system = /%SYSTEM_EXT%/bin/
-dir.system = /%PRODUCT%/bin/
-
-dir.vendor = /odm/bin/
-dir.vendor = /vendor/bin/
-dir.vendor = /data/nativetest/odm
-dir.vendor = /data/nativetest64/odm
-dir.vendor = /data/benchmarktest/odm
-dir.vendor = /data/benchmarktest64/odm
-dir.vendor = /data/nativetest/vendor
-dir.vendor = /data/nativetest64/vendor
-dir.vendor = /data/benchmarktest/vendor
-dir.vendor = /data/benchmarktest64/vendor
-
-dir.unrestricted = /data/nativetest/unrestricted
-dir.unrestricted = /data/nativetest64/unrestricted
-
-# TODO(b/123864775): Ensure tests are run from /data/nativetest{,64} or (if
-# necessary) the unrestricted subdirs above. Then clean this up.
-dir.unrestricted = /data/local/tmp
-
-dir.postinstall = /postinstall
-
-# Fallback entry to provide APEX namespace lookups for binaries anywhere else.
-# This must be last.
-dir.system = /data
-
-[system]
-additional.namespaces = runtime,conscrypt,media,neuralnetworks,resolv,sphal,vndk,rs
-
-###############################################################################
-# "default" namespace
-#
-# Framework-side code runs in this namespace. Libs from /vendor partition
-# can't be loaded in this namespace.
-###############################################################################
-namespace.default.isolated = true
-# Visible to allow links to be created at runtime, e.g. through
-# android_link_namespaces in libnativeloader.
-namespace.default.visible = true
-
-namespace.default.search.paths  = /system/${LIB}
-namespace.default.search.paths += /%SYSTEM_EXT%/${LIB}
-namespace.default.search.paths += /%PRODUCT%/${LIB}
-
-# We can't have entire /system/${LIB} as permitted paths because doing so
-# makes it possible to load libs in /system/${LIB}/vndk* directories by
-# their absolute paths (e.g. dlopen("/system/lib/vndk/libbase.so");).
-# VNDK libs are built with previous versions of Android and thus must not be
-# loaded into this namespace where libs built with the current version of
-# Android are loaded. Mixing the two types of libs in the same namespace can
-# cause unexpected problem.
-namespace.default.permitted.paths  = /system/${LIB}/drm
-namespace.default.permitted.paths += /system/${LIB}/extractors
-namespace.default.permitted.paths += /system/${LIB}/hw
-namespace.default.permitted.paths += /%SYSTEM_EXT%/${LIB}
-namespace.default.permitted.paths += /%PRODUCT%/${LIB}
-# These are where odex files are located. libart has to be able to dlopen the files
-namespace.default.permitted.paths += /system/framework
-namespace.default.permitted.paths += /system/app
-namespace.default.permitted.paths += /system/priv-app
-namespace.default.permitted.paths += /%SYSTEM_EXT%/framework
-namespace.default.permitted.paths += /%SYSTEM_EXT%/app
-namespace.default.permitted.paths += /%SYSTEM_EXT%/priv-app
-namespace.default.permitted.paths += /vendor/framework
-namespace.default.permitted.paths += /vendor/app
-namespace.default.permitted.paths += /vendor/priv-app
-namespace.default.permitted.paths += /system/vendor/framework
-namespace.default.permitted.paths += /system/vendor/app
-namespace.default.permitted.paths += /system/vendor/priv-app
-namespace.default.permitted.paths += /odm/framework
-namespace.default.permitted.paths += /odm/app
-namespace.default.permitted.paths += /odm/priv-app
-namespace.default.permitted.paths += /oem/app
-namespace.default.permitted.paths += /%PRODUCT%/framework
-namespace.default.permitted.paths += /%PRODUCT%/app
-namespace.default.permitted.paths += /%PRODUCT%/priv-app
-namespace.default.permitted.paths += /data
-namespace.default.permitted.paths += /mnt/expand
-namespace.default.permitted.paths += /apex/com.android.runtime/${LIB}/bionic
-namespace.default.permitted.paths += /system/${LIB}/bootstrap
-
-namespace.default.asan.search.paths  = /data/asan/system/${LIB}
-namespace.default.asan.search.paths +=           /system/${LIB}
-namespace.default.asan.search.paths += /data/asan/%SYSTEM_EXT%/${LIB}
-namespace.default.asan.search.paths +=           /%SYSTEM_EXT%/${LIB}
-namespace.default.asan.search.paths += /data/asan/%PRODUCT%/${LIB}
-namespace.default.asan.search.paths +=           /%PRODUCT%/${LIB}
-
-namespace.default.asan.permitted.paths  = /data
-namespace.default.asan.permitted.paths += /system/${LIB}/drm
-namespace.default.asan.permitted.paths += /system/${LIB}/extractors
-namespace.default.asan.permitted.paths += /system/${LIB}/hw
-namespace.default.asan.permitted.paths += /system/framework
-namespace.default.asan.permitted.paths += /system/app
-namespace.default.asan.permitted.paths += /system/priv-app
-namespace.default.asan.permitted.paths += /%SYSTEM_EXT%/${LIB}
-namespace.default.asan.permitted.paths += /%SYSTEM_EXT%/framework
-namespace.default.asan.permitted.paths += /%SYSTEM_EXT%/app
-namespace.default.asan.permitted.paths += /%SYSTEM_EXT%/priv-app
-namespace.default.asan.permitted.paths += /vendor/framework
-namespace.default.asan.permitted.paths += /vendor/app
-namespace.default.asan.permitted.paths += /vendor/priv-app
-namespace.default.asan.permitted.paths += /system/vendor/framework
-namespace.default.asan.permitted.paths += /system/vendor/app
-namespace.default.asan.permitted.paths += /system/vendor/priv-app
-namespace.default.asan.permitted.paths += /odm/framework
-namespace.default.asan.permitted.paths += /odm/app
-namespace.default.asan.permitted.paths += /odm/priv-app
-namespace.default.asan.permitted.paths += /oem/app
-namespace.default.asan.permitted.paths += /%PRODUCT%/${LIB}
-namespace.default.asan.permitted.paths += /%PRODUCT%/framework
-namespace.default.asan.permitted.paths += /%PRODUCT%/app
-namespace.default.asan.permitted.paths += /%PRODUCT%/priv-app
-namespace.default.asan.permitted.paths += /mnt/expand
-namespace.default.asan.permitted.paths += /apex/com.android.runtime/${LIB}/bionic
-namespace.default.asan.permitted.paths += /system/${LIB}/bootstrap
-
-# Keep in sync with the "platform" namespace in art/build/apex/ld.config.txt.
-# If a shared library or an executable requests a shared library that
-# cannot be loaded into the default namespace, the dynamic linker tries
-# to load the shared library from the runtime namespace. And then, if the
-# shared library cannot be loaded from the runtime namespace either, the
-# dynamic linker tries to load the shared library from the resolv namespace.
-# Finally, if all attempts fail, the dynamic linker returns an error.
-namespace.default.links = runtime,resolv,neuralnetworks
-namespace.default.link.runtime.shared_libs  = libandroidicu.so
-namespace.default.link.runtime.shared_libs += libdexfile_external.so
-namespace.default.link.runtime.shared_libs += libdexfiled_external.so
-# TODO(b/120786417 or b/134659294): libicuuc.so and libicui18n.so are kept for app compat.
-namespace.default.link.runtime.shared_libs += libicui18n.so
-namespace.default.link.runtime.shared_libs += libicuuc.so
-namespace.default.link.runtime.shared_libs += libnativebridge.so
-namespace.default.link.runtime.shared_libs += libnativehelper.so
-namespace.default.link.runtime.shared_libs += libnativeloader.so
-
-# TODO(b/122876336): Remove libpac.so once it's migrated to Webview
-namespace.default.link.runtime.shared_libs += libpac.so
-namespace.default.link.runtime.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-# When libnetd_resolv.so can't be found in the default namespace, search for it
-# in the resolv namespace. Don't allow any other libraries from the resolv namespace
-# to be loaded in the default namespace.
-namespace.default.link.resolv.shared_libs = libnetd_resolv.so
-
-# LLNDK library moved into apex
-namespace.default.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "runtime" APEX namespace
-#
-# This namespace exposes externally accessible libraries from the Runtime APEX.
-# Keep in sync with the "runtime" namespace in art/build/apex/ld.config.txt.
-###############################################################################
-namespace.runtime.isolated = true
-# Visible to allow links to be created at runtime, e.g. through
-# android_link_namespaces in libnativeloader.
-namespace.runtime.visible = true
-
-namespace.runtime.search.paths = /apex/com.android.runtime/${LIB}
-namespace.runtime.asan.search.paths = /apex/com.android.runtime/${LIB}
-namespace.runtime.links = default
-# Need allow_all_shared_libs because libart.so can dlopen oat files in
-# /system/framework and /data.
-# TODO(b/130340935): Use a dynamically created linker namespace similar to
-# classloader-namespace for oat files, and tighten this up.
-namespace.runtime.link.default.allow_all_shared_libs = true
-
-###############################################################################
-# "media" APEX namespace
-#
-# This namespace is for libraries within the media APEX.
-###############################################################################
-namespace.media.isolated = true
-namespace.media.visible = true
-
-namespace.media.search.paths = /apex/com.android.media/${LIB}
-namespace.media.asan.search.paths = /apex/com.android.media/${LIB}
-
-namespace.media.permitted.paths = /apex/com.android.media/${LIB}/extractors
-
-namespace.media.links = default,neuralnetworks
-namespace.media.link.default.shared_libs  = %LLNDK_LIBRARIES%
-namespace.media.link.default.shared_libs += libbinder_ndk.so
-namespace.media.link.default.shared_libs += libcgrouprc.so
-namespace.media.link.default.shared_libs += libmediametrics.so
-namespace.media.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-# LLNDK library moved into apex
-namespace.media.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "conscrypt" APEX namespace
-#
-# This namespace is for libraries within the conscrypt APEX.
-# Keep in sync with the "conscrypt" namespace in art/build/apex/ld.config.txt.
-###############################################################################
-namespace.conscrypt.isolated = true
-namespace.conscrypt.visible = true
-
-namespace.conscrypt.search.paths = /apex/com.android.conscrypt/${LIB}
-namespace.conscrypt.asan.search.paths = /apex/com.android.conscrypt/${LIB}
-namespace.conscrypt.links = runtime,default
-namespace.conscrypt.link.runtime.shared_libs  = libandroidio.so
-namespace.conscrypt.link.default.shared_libs  = libc.so
-namespace.conscrypt.link.default.shared_libs += libm.so
-namespace.conscrypt.link.default.shared_libs += libdl.so
-namespace.conscrypt.link.default.shared_libs += liblog.so
-
-###############################################################################
-# "resolv" APEX namespace
-#
-# This namespace is for libraries within the resolv APEX.
-###############################################################################
-namespace.resolv.isolated = true
-namespace.resolv.visible = true
-
-namespace.resolv.search.paths = /apex/com.android.resolv/${LIB}
-namespace.resolv.asan.search.paths = /apex/com.android.resolv/${LIB}
-namespace.resolv.links = default
-namespace.resolv.link.default.shared_libs  = libc.so
-namespace.resolv.link.default.shared_libs += libcgrouprc.so
-namespace.resolv.link.default.shared_libs += libm.so
-namespace.resolv.link.default.shared_libs += libdl.so
-namespace.resolv.link.default.shared_libs += libbinder_ndk.so
-namespace.resolv.link.default.shared_libs += liblog.so
-namespace.resolv.link.default.shared_libs += libvndksupport.so
-
-###############################################################################
-# "sphal" namespace
-#
-# SP-HAL(Sameprocess-HAL)s are the only vendor libraries that are allowed to be
-# loaded inside system processes. libEGL_<chipset>.so, libGLESv2_<chipset>.so,
-# android.hardware.graphics.mapper@2.0-impl.so, etc are SP-HALs.
-#
-# This namespace is exclusivly for SP-HALs. When the framework tries to dynami-
-# cally load SP-HALs, android_dlopen_ext() is used to explicitly specifying
-# that they should be searched and loaded from this namespace.
-#
-# Note that there is no link from the default namespace to this namespace.
-###############################################################################
-namespace.sphal.isolated = true
-# Visible to allow links to be created at runtime, e.g. through
-# android_link_namespaces in libnativeloader.
-namespace.sphal.visible = true
-
-namespace.sphal.search.paths  = /odm/${LIB}
-namespace.sphal.search.paths += /vendor/${LIB}
-namespace.sphal.search.paths += /vendor/${LIB}/hw
-
-namespace.sphal.permitted.paths  = /odm/${LIB}
-namespace.sphal.permitted.paths += /vendor/${LIB}
-namespace.sphal.permitted.paths += /system/vendor/${LIB}
-
-namespace.sphal.asan.search.paths  = /data/asan/odm/${LIB}
-namespace.sphal.asan.search.paths +=           /odm/${LIB}
-namespace.sphal.asan.search.paths += /data/asan/vendor/${LIB}
-namespace.sphal.asan.search.paths +=           /vendor/${LIB}
-
-namespace.sphal.asan.permitted.paths  = /data/asan/odm/${LIB}
-namespace.sphal.asan.permitted.paths +=           /odm/${LIB}
-namespace.sphal.asan.permitted.paths += /data/asan/vendor/${LIB}
-namespace.sphal.asan.permitted.paths +=           /vendor/${LIB}
-
-# Once in this namespace, access to libraries in /system/lib is restricted. Only
-# libs listed here can be used. Order is important here as the namespaces are
-# tried in this order. rs should be before vndk because both are capable
-# of loading libRS_internal.so
-namespace.sphal.links = rs,default,vndk,neuralnetworks
-
-# Renderscript gets separate namespace
-namespace.sphal.link.rs.shared_libs = libRS_internal.so
-
-namespace.sphal.link.default.shared_libs  = %LLNDK_LIBRARIES%
-namespace.sphal.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-namespace.sphal.link.vndk.shared_libs = %VNDK_SAMEPROCESS_LIBRARIES%
-
-# LLNDK library moved into apex
-namespace.sphal.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-
-###############################################################################
-# "rs" namespace
-#
-# This namespace is exclusively for Renderscript internal libraries.
-# This namespace has slightly looser restriction than the vndk namespace because
-# of the genuine characteristics of Renderscript; /data is in the permitted path
-# to load the compiled *.so file and libmediandk.so can be used here.
-###############################################################################
-namespace.rs.isolated = true
-namespace.rs.visible = true
-
-namespace.rs.search.paths  = /odm/${LIB}/vndk-sp
-namespace.rs.search.paths += /vendor/${LIB}/vndk-sp
-namespace.rs.search.paths += /system/${LIB}/vndk-sp%VNDK_VER%
-namespace.rs.search.paths += /odm/${LIB}
-namespace.rs.search.paths += /vendor/${LIB}
-
-namespace.rs.permitted.paths  = /odm/${LIB}
-namespace.rs.permitted.paths += /vendor/${LIB}
-namespace.rs.permitted.paths += /system/vendor/${LIB}
-namespace.rs.permitted.paths += /data
-
-namespace.rs.asan.search.paths  = /data/asan/odm/${LIB}/vndk-sp
-namespace.rs.asan.search.paths +=           /odm/${LIB}/vndk-sp
-namespace.rs.asan.search.paths += /data/asan/vendor/${LIB}/vndk-sp
-namespace.rs.asan.search.paths +=           /vendor/${LIB}/vndk-sp
-namespace.rs.asan.search.paths += /data/asan/system/${LIB}/vndk-sp%VNDK_VER%
-namespace.rs.asan.search.paths +=           /system/${LIB}/vndk-sp%VNDK_VER%
-namespace.rs.asan.search.paths += /data/asan/odm/${LIB}
-namespace.rs.asan.search.paths +=           /odm/${LIB}
-namespace.rs.asan.search.paths += /data/asan/vendor/${LIB}
-namespace.rs.asan.search.paths +=           /vendor/${LIB}
-
-namespace.rs.asan.permitted.paths  = /data/asan/odm/${LIB}
-namespace.rs.asan.permitted.paths +=           /odm/${LIB}
-namespace.rs.asan.permitted.paths += /data/asan/vendor/${LIB}
-namespace.rs.asan.permitted.paths +=           /vendor/${LIB}
-namespace.rs.asan.permitted.paths += /data
-
-namespace.rs.links = default,vndk,neuralnetworks
-
-namespace.rs.link.default.shared_libs  = %LLNDK_LIBRARIES%
-namespace.rs.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-# Private LLNDK libs (e.g. libft2.so) are exceptionally allowed to this
-# namespace because RS framework libs are using them.
-namespace.rs.link.default.shared_libs += %PRIVATE_LLNDK_LIBRARIES%
-
-namespace.rs.link.vndk.shared_libs = %VNDK_SAMEPROCESS_LIBRARIES%
-
-# LLNDK library moved into apex
-namespace.rs.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-
-###############################################################################
-# "vndk" namespace
-#
-# This namespace is exclusively for vndk-sp libs.
-###############################################################################
-namespace.vndk.isolated = true
-# Visible to allow links to be created at runtime, e.g. through
-# android_link_namespaces in libnativeloader.
-namespace.vndk.visible = true
-
-namespace.vndk.search.paths  = /odm/${LIB}/vndk-sp
-namespace.vndk.search.paths += /vendor/${LIB}/vndk-sp
-namespace.vndk.search.paths += /system/${LIB}/vndk-sp%VNDK_VER%
-
-namespace.vndk.permitted.paths  = /odm/${LIB}/hw
-namespace.vndk.permitted.paths += /odm/${LIB}/egl
-namespace.vndk.permitted.paths += /vendor/${LIB}/hw
-namespace.vndk.permitted.paths += /vendor/${LIB}/egl
-namespace.vndk.permitted.paths += /system/vendor/${LIB}/hw
-namespace.vndk.permitted.paths += /system/vendor/${LIB}/egl
-# This is exceptionally required since android.hidl.memory@1.0-impl.so is here
-namespace.vndk.permitted.paths += /system/${LIB}/vndk-sp%VNDK_VER%/hw
-
-namespace.vndk.asan.search.paths  = /data/asan/odm/${LIB}/vndk-sp
-namespace.vndk.asan.search.paths +=           /odm/${LIB}/vndk-sp
-namespace.vndk.asan.search.paths += /data/asan/vendor/${LIB}/vndk-sp
-namespace.vndk.asan.search.paths +=           /vendor/${LIB}/vndk-sp
-namespace.vndk.asan.search.paths += /data/asan/system/${LIB}/vndk-sp%VNDK_VER%
-namespace.vndk.asan.search.paths +=           /system/${LIB}/vndk-sp%VNDK_VER%
-
-namespace.vndk.asan.permitted.paths  = /data/asan/odm/${LIB}/hw
-namespace.vndk.asan.permitted.paths +=           /odm/${LIB}/hw
-namespace.vndk.asan.permitted.paths += /data/asan/odm/${LIB}/egl
-namespace.vndk.asan.permitted.paths +=           /odm/${LIB}/egl
-namespace.vndk.asan.permitted.paths += /data/asan/vendor/${LIB}/hw
-namespace.vndk.asan.permitted.paths +=           /vendor/${LIB}/hw
-namespace.vndk.asan.permitted.paths += /data/asan/vendor/${LIB}/egl
-namespace.vndk.asan.permitted.paths +=           /vendor/${LIB}/egl
-
-namespace.vndk.asan.permitted.paths += /data/asan/system/${LIB}/vndk-sp%VNDK_VER%/hw
-namespace.vndk.asan.permitted.paths +=           /system/${LIB}/vndk-sp%VNDK_VER%/hw
-
-# The "vndk" namespace links to "default" namespace for LLNDK libs and links to
-# "sphal" namespace for vendor libs.  The ordering matters.  The "default"
-# namespace has higher priority than the "sphal" namespace.
-namespace.vndk.links = default,sphal,runtime,neuralnetworks
-
-# When these NDK libs are required inside this namespace, then it is redirected
-# to the default namespace. This is possible since their ABI is stable across
-# Android releases.
-namespace.vndk.link.default.shared_libs  = %LLNDK_LIBRARIES%
-namespace.vndk.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-namespace.vndk.link.runtime.shared_libs = %SANITIZER_RUNTIME_LIBRARIES%
-
-# Allow VNDK-SP extensions to use vendor libraries
-namespace.vndk.link.sphal.allow_all_shared_libs = true
-
-# LLNDK library moved into apex
-namespace.vndk.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "neuralnetworks" APEX namespace
-#
-# This namespace is for libraries within the NNAPI APEX.
-###############################################################################
-namespace.neuralnetworks.isolated = true
-namespace.neuralnetworks.visible = true
-
-namespace.neuralnetworks.search.paths = /apex/com.android.neuralnetworks/${LIB}
-namespace.neuralnetworks.asan.search.paths = /apex/com.android.neuralnetworks/${LIB}
-namespace.neuralnetworks.links = default
-namespace.neuralnetworks.link.default.shared_libs  = libc.so
-namespace.neuralnetworks.link.default.shared_libs += libcgrouprc.so
-namespace.neuralnetworks.link.default.shared_libs += libdl.so
-namespace.neuralnetworks.link.default.shared_libs += liblog.so
-namespace.neuralnetworks.link.default.shared_libs += libm.so
-namespace.neuralnetworks.link.default.shared_libs += libnativewindow.so
-namespace.neuralnetworks.link.default.shared_libs += libsync.so
-namespace.neuralnetworks.link.default.shared_libs += libvndksupport.so
-
-###############################################################################
-# Namespace config for vendor processes. In O, no restriction is enforced for
-# them. However, in O-MR1, access to /system/${LIB} will not be allowed to
-# the default namespace. 'system' namespace will be added to give limited
-# (LL-NDK only) access.
-###############################################################################
-[vendor]
-additional.namespaces = runtime,system,neuralnetworks,vndk%VNDK_IN_SYSTEM_NS%
-
-###############################################################################
-# "default" namespace
-#
-# This is the default linker namespace for a vendor process (a process started
-# from /vendor/bin/*). The main executable and the libs under /vendor/lib[64]
-# are loaded directly into this namespace. However, other libs under the system
-# partition (VNDK and LLNDK libraries) are not loaded here but from the
-# separate namespace 'system'. The delegation to the system namespace is done
-# via the 'namespace.default.link.system.shared_libs' property below.
-#
-# '#VNDK27#' TAG is only for building ld.config.27.txt for backward
-# compatibility. (TODO:b/123390078) Move them to a separate file.
-###############################################################################
-namespace.default.isolated = true
-namespace.default.visible = true
-
-namespace.default.search.paths  = /odm/${LIB}
-namespace.default.search.paths += /vendor/${LIB}
-
-namespace.default.permitted.paths  = /odm
-namespace.default.permitted.paths += /vendor
-namespace.default.permitted.paths += /system/vendor
-#VNDK27#namespace.default.search.paths += /vendor/${LIB}/hw
-#VNDK27#namespace.default.search.paths += /vendor/${LIB}/egl
-
-namespace.default.asan.search.paths  = /data/asan/odm/${LIB}
-namespace.default.asan.search.paths +=           /odm/${LIB}
-namespace.default.asan.search.paths += /data/asan/vendor/${LIB}
-namespace.default.asan.search.paths +=           /vendor/${LIB}
-#VNDK27#namespace.default.asan.search.paths += /data/asan/vendor/${LIB}/hw
-#VNDK27#namespace.default.asan.search.paths +=           /vendor/${LIB}/hw
-#VNDK27#namespace.default.asan.search.paths += /data/asan/vendor/${LIB}/egl
-#VNDK27#namespace.default.asan.search.paths +=           /vendor/${LIB}/egl
-
-namespace.default.asan.permitted.paths  = /data/asan/odm
-namespace.default.asan.permitted.paths +=           /odm
-namespace.default.asan.permitted.paths += /data/asan/vendor
-namespace.default.asan.permitted.paths +=           /vendor
-
-namespace.default.links = system,vndk%VNDK_IN_SYSTEM_NS%,runtime,neuralnetworks
-namespace.default.link.runtime.shared_libs = %SANITIZER_RUNTIME_LIBRARIES%
-namespace.default.link.system.shared_libs  = %LLNDK_LIBRARIES%
-namespace.default.link.system.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-namespace.default.link.vndk_in_system.shared_libs = %VNDK_USING_CORE_VARIANT_LIBRARIES%
-namespace.default.link.vndk.shared_libs  = %VNDK_SAMEPROCESS_LIBRARIES%
-namespace.default.link.vndk.shared_libs += %VNDK_CORE_LIBRARIES%
-
-# LLNDK library moved into apex
-namespace.default.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "runtime" APEX namespace
-#
-# This namespace exposes externally accessible libraries from the Runtime APEX.
-# Keep in sync with the "runtime" namespace in art/build/apex/ld.config.txt.
-###############################################################################
-namespace.runtime.isolated = true
-
-namespace.runtime.search.paths = /apex/com.android.runtime/${LIB}
-namespace.runtime.asan.search.paths = /apex/com.android.runtime/${LIB}
-namespace.runtime.links = system
-# TODO(b/130340935): Use a dynamically created linker namespace similar to
-# classloader-namespace for oat files, and tighten this up.
-namespace.runtime.link.system.allow_all_shared_libs = true
-
-
-###############################################################################
-# "vndk" namespace
-#
-# This namespace is where VNDK and VNDK-SP libraries are loaded for
-# a vendor process.
-###############################################################################
-namespace.vndk.isolated = false
-
-namespace.vndk.search.paths  = /odm/${LIB}/vndk
-namespace.vndk.search.paths += /odm/${LIB}/vndk-sp
-namespace.vndk.search.paths += /vendor/${LIB}/vndk
-namespace.vndk.search.paths += /vendor/${LIB}/vndk-sp
-namespace.vndk.search.paths += /system/${LIB}/vndk-sp%VNDK_VER%
-namespace.vndk.search.paths += /system/${LIB}/vndk%VNDK_VER%
-
-namespace.vndk.asan.search.paths  = /data/asan/odm/${LIB}/vndk
-namespace.vndk.asan.search.paths +=           /odm/${LIB}/vndk
-namespace.vndk.asan.search.paths += /data/asan/odm/${LIB}/vndk-sp
-namespace.vndk.asan.search.paths +=           /odm/${LIB}/vndk-sp
-namespace.vndk.asan.search.paths += /data/asan/vendor/${LIB}/vndk
-namespace.vndk.asan.search.paths +=           /vendor/${LIB}/vndk
-namespace.vndk.asan.search.paths += /data/asan/vendor/${LIB}/vndk-sp
-namespace.vndk.asan.search.paths +=           /vendor/${LIB}/vndk-sp
-namespace.vndk.asan.search.paths += /data/asan/system/${LIB}/vndk-sp%VNDK_VER%
-namespace.vndk.asan.search.paths +=           /system/${LIB}/vndk-sp%VNDK_VER%
-namespace.vndk.asan.search.paths += /data/asan/system/${LIB}/vndk%VNDK_VER%
-namespace.vndk.asan.search.paths +=           /system/${LIB}/vndk%VNDK_VER%
-
-# When these NDK libs are required inside this namespace, then it is redirected
-# to the system namespace. This is possible since their ABI is stable across
-# Android releases.  The links here should be identical to that of the
-# 'vndk_in_system' namespace, except for the link between 'vndk' and
-# 'vndk_in_system'.
-namespace.vndk.links = system,default%VNDK_IN_SYSTEM_NS%,runtime,neuralnetworks
-
-namespace.vndk.link.system.shared_libs  = %LLNDK_LIBRARIES%
-namespace.vndk.link.system.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-namespace.vndk.link.default.allow_all_shared_libs = true
-
-namespace.vndk.link.runtime.shared_libs = %SANITIZER_RUNTIME_LIBRARIES%
-
-namespace.vndk.link.vndk_in_system.shared_libs = %VNDK_USING_CORE_VARIANT_LIBRARIES%
-
-# LLNDK library moved into apex
-namespace.vndk.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "system" namespace
-#
-# This namespace is where system libs (VNDK and LLNDK libs) are loaded for
-# a vendor process.
-###############################################################################
-namespace.system.isolated = false
-
-namespace.system.search.paths  = /system/${LIB}
-namespace.system.search.paths += /%SYSTEM_EXT%/${LIB}
-namespace.system.search.paths += /%PRODUCT%/${LIB}
-
-namespace.system.asan.search.paths  = /data/asan/system/${LIB}
-namespace.system.asan.search.paths +=           /system/${LIB}
-namespace.system.asan.search.paths += /data/asan/%SYSTEM_EXT%/${LIB}
-namespace.system.asan.search.paths +=           /%SYSTEM_EXT%/${LIB}
-namespace.system.asan.search.paths += /data/asan/%PRODUCT%/${LIB}
-namespace.system.asan.search.paths +=           /%PRODUCT%/${LIB}
-
-namespace.system.links = runtime
-namespace.system.link.runtime.shared_libs  = libdexfile_external.so
-namespace.system.link.runtime.shared_libs += libdexfiled_external.so
-# TODO(b/120786417 or b/134659294): libicuuc.so and libicui18n.so are kept for app compat.
-namespace.system.link.runtime.shared_libs += libicui18n.so
-namespace.system.link.runtime.shared_libs += libicuuc.so
-namespace.system.link.runtime.shared_libs += libnativebridge.so
-namespace.system.link.runtime.shared_libs += libnativehelper.so
-namespace.system.link.runtime.shared_libs += libnativeloader.so
-# Workaround for b/124772622
-namespace.system.link.runtime.shared_libs += libandroidicu.so
-namespace.system.link.runtime.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-###############################################################################
-# "vndk_in_system" namespace
-#
-# This namespace is where no-vendor-variant VNDK libraries are loaded for a
-# vendor process.  Note that we do not simply export these libraries from
-# "system" namespace, because in some case both the core variant and the
-# vendor variant of a VNDK library may be loaded.  In such case, we do not
-# want to eliminate double-loading because doing so means the global states
-# of the library would be shared.
-#
-# Only the no-vendor-variant VNDK libraries are whitelisted in this namespace.
-# This is to ensure that we do not load libraries needed by no-vendor-variant
-# VNDK libraries into vndk_in_system namespace.
-###############################################################################
-namespace.vndk_in_system.isolated = true
-namespace.vndk_in_system.visible = true
-
-# The search paths here should be kept the same as that of the 'system'
-# namespace.
-namespace.vndk_in_system.search.paths  = /system/${LIB}
-namespace.vndk_in_system.search.paths += /%SYSTEM_EXT%/${LIB}
-namespace.vndk_in_system.search.paths += /%PRODUCT%/${LIB}
-
-namespace.vndk_in_system.asan.search.paths  = /data/asan/system/${LIB}
-namespace.vndk_in_system.asan.search.paths +=           /system/${LIB}
-namespace.vndk_in_system.asan.search.paths += /data/asan/%SYSTEM_EXT%/${LIB}
-namespace.vndk_in_system.asan.search.paths +=           /%SYSTEM_EXT%/${LIB}
-namespace.vndk_in_system.asan.search.paths += /data/asan/%PRODUCT%/${LIB}
-namespace.vndk_in_system.asan.search.paths +=           /%PRODUCT%/${LIB}
-
-namespace.vndk_in_system.whitelisted = %VNDK_USING_CORE_VARIANT_LIBRARIES%
-
-# The links here should be identical to that of the 'vndk' namespace, with the
-# following exception:
-#   1. 'vndk_in_system' needs to be freely linked back to 'vndk'.
-#   2. 'vndk_in_system' does not need to link to 'default', as any library that
-#      requires anything vendor would not be a vndk_in_system library.
-namespace.vndk_in_system.links = vndk,system,runtime,neuralnetworks
-namespace.vndk_in_system.link.runtime.shared_libs = %SANITIZER_RUNTIME_LIBRARIES%
-
-namespace.vndk_in_system.link.system.shared_libs  = %LLNDK_LIBRARIES%
-namespace.vndk_in_system.link.system.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-namespace.vndk_in_system.link.vndk.allow_all_shared_libs = true
-namespace.vndk_in_system.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "neuralnetworks" APEX namespace
-#
-# This namespace is for libraries within the NNAPI APEX.
-###############################################################################
-namespace.neuralnetworks.isolated = true
-namespace.neuralnetworks.visible = true
-
-namespace.neuralnetworks.search.paths = /apex/com.android.neuralnetworks/${LIB}
-namespace.neuralnetworks.asan.search.paths = /apex/com.android.neuralnetworks/${LIB}
-namespace.neuralnetworks.links = default
-namespace.neuralnetworks.link.default.shared_libs  = libc.so
-namespace.neuralnetworks.link.default.shared_libs += libcgrouprc.so
-namespace.neuralnetworks.link.default.shared_libs += libdl.so
-namespace.neuralnetworks.link.default.shared_libs += liblog.so
-namespace.neuralnetworks.link.default.shared_libs += libm.so
-namespace.neuralnetworks.link.default.shared_libs += libnativewindow.so
-namespace.neuralnetworks.link.default.shared_libs += libsync.so
-namespace.neuralnetworks.link.default.shared_libs += libvndksupport.so
-
-###############################################################################
-# Namespace config for native tests that need access to both system and vendor
-# libraries. This replicates the default linker config (done by
-# init_default_namespace_no_config in bionic/linker/linker.cpp), except that it
-# includes the requisite namespace setup for APEXes.
-###############################################################################
-[unrestricted]
-additional.namespaces = runtime,media,conscrypt,resolv,neuralnetworks
-
-# Visible to allow links to be created at runtime, e.g. through
-# android_link_namespaces in libnativeloader.
-namespace.default.visible = true
-
-namespace.default.search.paths  = /system/${LIB}
-namespace.default.search.paths += /odm/${LIB}
-namespace.default.search.paths += /vendor/${LIB}
-
-namespace.default.asan.search.paths  = /data/asan/system/${LIB}
-namespace.default.asan.search.paths +=           /system/${LIB}
-namespace.default.asan.search.paths += /data/asan/odm/${LIB}
-namespace.default.asan.search.paths +=           /odm/${LIB}
-namespace.default.asan.search.paths += /data/asan/vendor/${LIB}
-namespace.default.asan.search.paths +=           /vendor/${LIB}
-
-# Keep in sync with the "platform" namespace in art/build/apex/ld.config.txt.
-namespace.default.links = runtime,resolv,neuralnetworks
-namespace.default.link.runtime.shared_libs  = libandroidicu.so
-namespace.default.link.runtime.shared_libs += libdexfile_external.so
-namespace.default.link.runtime.shared_libs += libdexfiled_external.so
-# TODO(b/120786417 or b/134659294): libicuuc.so and libicui18n.so are kept for app compat.
-namespace.default.link.runtime.shared_libs += libicui18n.so
-namespace.default.link.runtime.shared_libs += libicuuc.so
-namespace.default.link.runtime.shared_libs += libnativebridge.so
-namespace.default.link.runtime.shared_libs += libnativehelper.so
-namespace.default.link.runtime.shared_libs += libnativeloader.so
-
-# TODO(b/122876336): Remove libpac.so once it's migrated to Webview
-namespace.default.link.runtime.shared_libs += libpac.so
-namespace.default.link.runtime.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-namespace.default.link.resolv.shared_libs = libnetd_resolv.so
-namespace.default.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "runtime" APEX namespace
-#
-# This namespace exposes externally accessible libraries from the Runtime APEX.
-# Keep in sync with the "runtime" namespace in art/build/apex/ld.config.txt.
-###############################################################################
-namespace.runtime.isolated = true
-# Visible to allow links to be created at runtime, e.g. through
-# android_link_namespaces in libnativeloader.
-namespace.runtime.visible = true
-
-namespace.runtime.search.paths = /apex/com.android.runtime/${LIB}
-namespace.runtime.asan.search.paths = /apex/com.android.runtime/${LIB}
-namespace.runtime.links = default
-# TODO(b/130340935): Use a dynamically created linker namespace similar to
-# classloader-namespace for oat files, and tighten this up.
-namespace.runtime.link.default.allow_all_shared_libs = true
-
-###############################################################################
-# "media" APEX namespace
-#
-# This namespace is for libraries within the media APEX.
-###############################################################################
-namespace.media.isolated = true
-namespace.media.visible = true
-
-namespace.media.search.paths = /apex/com.android.media/${LIB}
-namespace.media.asan.search.paths = /apex/com.android.media/${LIB}
-
-namespace.media.permitted.paths = /apex/com.android.media/${LIB}/extractors
-
-namespace.media.links = default,neuralnetworks
-namespace.media.link.default.shared_libs  = %LLNDK_LIBRARIES%
-namespace.media.link.default.shared_libs += libbinder_ndk.so
-namespace.media.link.default.shared_libs += libmediametrics.so
-namespace.media.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-# LLNDK library moved into apex
-namespace.media.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-
-###############################################################################
-# "conscrypt" APEX namespace
-#
-# This namespace is for libraries within the conscrypt APEX.
-# Keep in sync with the "conscrypt" namespace in art/build/apex/ld.config.txt.
-###############################################################################
-namespace.conscrypt.isolated = true
-namespace.conscrypt.visible = true
-
-namespace.conscrypt.search.paths = /apex/com.android.conscrypt/${LIB}
-namespace.conscrypt.asan.search.paths = /apex/com.android.conscrypt/${LIB}
-namespace.conscrypt.links = runtime,default
-namespace.conscrypt.link.runtime.shared_libs  = libandroidio.so
-namespace.conscrypt.link.default.shared_libs  = libc.so
-namespace.conscrypt.link.default.shared_libs += libm.so
-namespace.conscrypt.link.default.shared_libs += libdl.so
-namespace.conscrypt.link.default.shared_libs += liblog.so
-
-###############################################################################
-# "resolv" APEX namespace
-#
-# This namespace is for libraries within the resolv APEX.
-###############################################################################
-namespace.resolv.isolated = true
-namespace.resolv.visible = true
-
-namespace.resolv.search.paths = /apex/com.android.resolv/${LIB}
-namespace.resolv.asan.search.paths = /apex/com.android.resolv/${LIB}
-namespace.resolv.links = default
-namespace.resolv.link.default.shared_libs  = libc.so
-namespace.resolv.link.default.shared_libs += libm.so
-namespace.resolv.link.default.shared_libs += libdl.so
-namespace.resolv.link.default.shared_libs += libbinder_ndk.so
-namespace.resolv.link.default.shared_libs += liblog.so
-
-###############################################################################
-# "neuralnetworks" APEX namespace
-#
-# This namespace is for libraries within the NNAPI APEX.
-###############################################################################
-namespace.neuralnetworks.isolated = true
-namespace.neuralnetworks.visible = true
-
-namespace.neuralnetworks.search.paths = /apex/com.android.neuralnetworks/${LIB}
-namespace.neuralnetworks.asan.search.paths = /apex/com.android.neuralnetworks/${LIB}
-namespace.neuralnetworks.links = default
-namespace.neuralnetworks.link.default.shared_libs  = libc.so
-namespace.neuralnetworks.link.default.shared_libs += libcgrouprc.so
-namespace.neuralnetworks.link.default.shared_libs += libdl.so
-namespace.neuralnetworks.link.default.shared_libs += liblog.so
-namespace.neuralnetworks.link.default.shared_libs += libm.so
-namespace.neuralnetworks.link.default.shared_libs += libnativewindow.so
-namespace.neuralnetworks.link.default.shared_libs += libsync.so
-namespace.neuralnetworks.link.default.shared_libs += libvndksupport.so
-
-###############################################################################
-# Namespace config for binaries under /postinstall.
-# Only default namespace is defined and default has no directories
-# other than /system/lib in the search paths. This is because linker calls
-# realpath on the search paths and this causes selinux denial if the paths
-# (/vendor, /odm) are not allowed to the postinstall binaries. There is no
-# reason to allow the binaries to access the paths.
-###############################################################################
-[postinstall]
-namespace.default.isolated = false
-namespace.default.search.paths  = /system/${LIB}
-namespace.default.search.paths += /%SYSTEM_EXT%/${LIB}
-namespace.default.search.paths += /%PRODUCT%/${LIB}
-
-namespace.default.link.runtime.shared_libs = %SANITIZER_RUNTIME_LIBRARIES%
+# This file is no longer in use.
+# Please update linker configuration generator instead.
+# You can find the code from /system/linkerconfig
\ No newline at end of file
diff --git a/rootdir/etc/ld.config.vndk_lite.txt b/rootdir/etc/ld.config.vndk_lite.txt
index 0bb60ab..9c9f4a9 100644
--- a/rootdir/etc/ld.config.vndk_lite.txt
+++ b/rootdir/etc/ld.config.vndk_lite.txt
@@ -35,7 +35,7 @@
 dir.system = /data
 
 [system]
-additional.namespaces = runtime,conscrypt,media,neuralnetworks,resolv,sphal,vndk,rs
+additional.namespaces = art,conscrypt,media,neuralnetworks,resolv,sphal,vndk,rs
 
 ###############################################################################
 # "default" namespace
@@ -68,23 +68,23 @@
 # Keep in sync with the "platform" namespace in art/build/apex/ld.config.txt.
 # If a shared library or an executable requests a shared library that
 # cannot be loaded into the default namespace, the dynamic linker tries
-# to load the shared library from the runtime namespace. And then, if the
-# shared library cannot be loaded from the runtime namespace either, the
+# to load the shared library from the art namespace. And then, if the
+# shared library cannot be loaded from the art namespace either, the
 # dynamic linker tries to load the shared library from the resolv namespace.
 # Finally, if all attempts fail, the dynamic linker returns an error.
-namespace.default.links = runtime,resolv,neuralnetworks
-namespace.default.link.runtime.shared_libs  = libandroidicu.so
-namespace.default.link.runtime.shared_libs += libdexfile_external.so
-namespace.default.link.runtime.shared_libs += libdexfiled_external.so
+namespace.default.links = art,resolv,neuralnetworks
+namespace.default.link.art.shared_libs  = libandroidicu.so
+namespace.default.link.art.shared_libs += libdexfile_external.so
+namespace.default.link.art.shared_libs += libdexfiled_external.so
 # TODO(b/120786417 or b/134659294): libicuuc.so and libicui18n.so are kept for app compat.
-namespace.default.link.runtime.shared_libs += libicui18n.so
-namespace.default.link.runtime.shared_libs += libicuuc.so
-namespace.default.link.runtime.shared_libs += libnativebridge.so
-namespace.default.link.runtime.shared_libs += libnativehelper.so
-namespace.default.link.runtime.shared_libs += libnativeloader.so
+namespace.default.link.art.shared_libs += libicui18n.so
+namespace.default.link.art.shared_libs += libicuuc.so
+namespace.default.link.art.shared_libs += libnativebridge.so
+namespace.default.link.art.shared_libs += libnativehelper.so
+namespace.default.link.art.shared_libs += libnativeloader.so
 
 # TODO(b/122876336): Remove libpac.so once it's migrated to Webview
-namespace.default.link.runtime.shared_libs += libpac.so
+namespace.default.link.art.shared_libs += libpac.so
 
 # When libnetd_resolv.so can't be found in the default namespace, search for it
 # in the resolv namespace. Don't allow any other libraries from the resolv namespace
@@ -95,24 +95,25 @@
 namespace.default.link.neuralnetworks.shared_libs = libneuralnetworks.so
 
 ###############################################################################
-# "runtime" APEX namespace
+# "art" APEX namespace
 #
-# This namespace pulls in externally accessible libs from the Runtime APEX.
-# Keep in sync with the "runtime" namespace in art/build/apex/ld.config.txt.
+# This namespace pulls in externally accessible libs from the ART APEX.
+# Keep in sync with the "art" namespace in art/build/apex/ld.config.txt.
 ###############################################################################
-namespace.runtime.isolated = true
+namespace.art.isolated = true
 # Visible to allow links to be created at runtime, e.g. through
 # android_link_namespaces in libnativeloader.
-namespace.runtime.visible = true
+namespace.art.visible = true
 
-namespace.runtime.search.paths = /apex/com.android.runtime/${LIB}
-namespace.runtime.asan.search.paths = /apex/com.android.runtime/${LIB}
-namespace.runtime.links = default
+namespace.art.search.paths = /apex/com.android.art/${LIB}
+namespace.art.asan.search.paths = /apex/com.android.art/${LIB}
+namespace.art.links = default,neuralnetworks
 # Need allow_all_shared_libs because libart.so can dlopen oat files in
 # /system/framework and /data.
 # TODO(b/130340935): Use a dynamically created linker namespace similar to
 # classloader-namespace for oat files, and tighten this up.
-namespace.runtime.link.default.allow_all_shared_libs = true
+namespace.art.link.default.allow_all_shared_libs = true
+namespace.art.link.neuralnetworks.shared_libs = libneuralnetworks.so
 
 ###############################################################################
 # "media" APEX namespace
@@ -147,12 +148,13 @@
 
 namespace.conscrypt.search.paths = /apex/com.android.conscrypt/${LIB}
 namespace.conscrypt.asan.search.paths = /apex/com.android.conscrypt/${LIB}
-namespace.conscrypt.links = runtime,default
-namespace.conscrypt.link.runtime.shared_libs  = libandroidio.so
+namespace.conscrypt.links = art,default
+namespace.conscrypt.link.art.shared_libs = libandroidio.so
 namespace.conscrypt.link.default.shared_libs  = libc.so
 namespace.conscrypt.link.default.shared_libs += libm.so
 namespace.conscrypt.link.default.shared_libs += libdl.so
 namespace.conscrypt.link.default.shared_libs += liblog.so
+namespace.conscrypt.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
 
 ###############################################################################
 # "resolv" APEX namespace
@@ -172,6 +174,7 @@
 namespace.resolv.link.default.shared_libs += libbinder_ndk.so
 namespace.resolv.link.default.shared_libs += liblog.so
 namespace.resolv.link.default.shared_libs += libvndksupport.so
+namespace.resolv.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
 
 ###############################################################################
 # "sphal" namespace
@@ -265,7 +268,7 @@
 namespace.rs.asan.permitted.paths +=           /vendor/${LIB}
 namespace.rs.asan.permitted.paths += /data
 
-namespace.rs.links = default,vndk,neuralnetworks
+namespace.rs.links = default,neuralnetworks
 
 namespace.rs.link.default.shared_libs  = %LLNDK_LIBRARIES%
 namespace.rs.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
@@ -273,8 +276,6 @@
 # namespace because RS framework libs are using them.
 namespace.rs.link.default.shared_libs += %PRIVATE_LLNDK_LIBRARIES%
 
-namespace.rs.link.vndk.shared_libs = %VNDK_SAMEPROCESS_LIBRARIES%
-
 # LLNDK library moved into apex
 namespace.rs.link.neuralnetworks.shared_libs = libneuralnetworks.so
 
@@ -345,9 +346,10 @@
 namespace.neuralnetworks.link.default.shared_libs += liblog.so
 namespace.neuralnetworks.link.default.shared_libs += libm.so
 namespace.neuralnetworks.link.default.shared_libs += libnativewindow.so
+namespace.neuralnetworks.link.default.shared_libs += libneuralnetworks_packageinfo.so
 namespace.neuralnetworks.link.default.shared_libs += libsync.so
 namespace.neuralnetworks.link.default.shared_libs += libvndksupport.so
-
+namespace.neuralnetworks.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
 
 ###############################################################################
 # Namespace config for vendor processes. In O, no restriction is enforced for
@@ -356,7 +358,7 @@
 # (LL-NDK only) access.
 ###############################################################################
 [vendor]
-additional.namespaces = runtime,neuralnetworks
+additional.namespaces = art,neuralnetworks
 
 namespace.default.isolated = false
 
@@ -398,35 +400,35 @@
 namespace.default.asan.search.paths += /data/asan/system/${LIB}/vndk%VNDK_VER%
 namespace.default.asan.search.paths +=           /system/${LIB}/vndk%VNDK_VER%
 
-namespace.default.links = runtime,neuralnetworks
-namespace.default.link.runtime.shared_libs  = libdexfile_external.so
-namespace.default.link.runtime.shared_libs += libdexfiled_external.so
+namespace.default.links = art,neuralnetworks
+namespace.default.link.art.shared_libs  = libdexfile_external.so
+namespace.default.link.art.shared_libs += libdexfiled_external.so
 # TODO(b/120786417 or b/134659294): libicuuc.so and libicui18n.so are kept for app compat.
-namespace.default.link.runtime.shared_libs += libicui18n.so
-namespace.default.link.runtime.shared_libs += libicuuc.so
-namespace.default.link.runtime.shared_libs += libnativebridge.so
-namespace.default.link.runtime.shared_libs += libnativehelper.so
-namespace.default.link.runtime.shared_libs += libnativeloader.so
+namespace.default.link.art.shared_libs += libicui18n.so
+namespace.default.link.art.shared_libs += libicuuc.so
+namespace.default.link.art.shared_libs += libnativebridge.so
+namespace.default.link.art.shared_libs += libnativehelper.so
+namespace.default.link.art.shared_libs += libnativeloader.so
 # Workaround for b/124772622
-namespace.default.link.runtime.shared_libs += libandroidicu.so
+namespace.default.link.art.shared_libs += libandroidicu.so
 
 # LLNDK library moved into apex
 namespace.default.link.neuralnetworks.shared_libs = libneuralnetworks.so
 
 ###############################################################################
-# "runtime" APEX namespace
+# "art" APEX namespace
 #
-# This namespace exposes externally accessible libraries from the Runtime APEX.
-# Keep in sync with the "runtime" namespace in art/build/apex/ld.config.txt.
+# This namespace exposes externally accessible libraries from the ART APEX.
+# Keep in sync with the "art" namespace in art/build/apex/ld.config.txt.
 ###############################################################################
-namespace.runtime.isolated = true
+namespace.art.isolated = true
 
-namespace.runtime.search.paths = /apex/com.android.runtime/${LIB}
-namespace.runtime.asan.search.paths = /apex/com.android.runtime/${LIB}
-namespace.runtime.links = default
+namespace.art.search.paths = /apex/com.android.art/${LIB}
+namespace.art.asan.search.paths = /apex/com.android.art/${LIB}
+namespace.art.links = default
 # TODO(b/130340935): Use a dynamically created linker namespace similar to
 # classloader-namespace for oat files, and tighten this up.
-namespace.runtime.link.default.allow_all_shared_libs = true
+namespace.art.link.default.allow_all_shared_libs = true
 
 ###############################################################################
 # "neuralnetworks" APEX namespace
@@ -445,9 +447,10 @@
 namespace.neuralnetworks.link.default.shared_libs += liblog.so
 namespace.neuralnetworks.link.default.shared_libs += libm.so
 namespace.neuralnetworks.link.default.shared_libs += libnativewindow.so
+namespace.neuralnetworks.link.default.shared_libs += libneuralnetworks_packageinfo.so
 namespace.neuralnetworks.link.default.shared_libs += libsync.so
 namespace.neuralnetworks.link.default.shared_libs += libvndksupport.so
-
+namespace.neuralnetworks.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
 
 ###############################################################################
 # Namespace config for native tests that need access to both system and vendor
@@ -456,7 +459,7 @@
 # includes the requisite namespace setup for APEXes.
 ###############################################################################
 [unrestricted]
-additional.namespaces = runtime,media,conscrypt,resolv,neuralnetworks
+additional.namespaces = art,media,conscrypt,resolv,neuralnetworks
 
 # Visible to allow links to be created at runtime, e.g. through
 # android_link_namespaces in libnativeloader.
@@ -474,20 +477,19 @@
 namespace.default.asan.search.paths +=           /vendor/${LIB}
 
 # Keep in sync with the "platform" namespace in art/build/apex/ld.config.txt.
-namespace.default.links = runtime,resolv,neuralnetworks
-namespace.default.link.runtime.shared_libs  = libandroidicu.so
-namespace.default.link.runtime.shared_libs += libdexfile_external.so
-namespace.default.link.runtime.shared_libs += libdexfiled_external.so
+namespace.default.links = art,resolv,neuralnetworks
+namespace.default.link.art.shared_libs  = libandroidicu.so
+namespace.default.link.art.shared_libs += libdexfile_external.so
+namespace.default.link.art.shared_libs += libdexfiled_external.so
 # TODO(b/120786417 or b/134659294): libicuuc.so and libicui18n.so are kept for app compat.
-namespace.default.link.runtime.shared_libs += libicui18n.so
-namespace.default.link.runtime.shared_libs += libicuuc.so
-namespace.default.link.runtime.shared_libs += libnativebridge.so
-namespace.default.link.runtime.shared_libs += libnativehelper.so
-namespace.default.link.runtime.shared_libs += libnativeloader.so
+namespace.default.link.art.shared_libs += libicui18n.so
+namespace.default.link.art.shared_libs += libicuuc.so
+namespace.default.link.art.shared_libs += libnativebridge.so
+namespace.default.link.art.shared_libs += libnativehelper.so
+namespace.default.link.art.shared_libs += libnativeloader.so
 
 # TODO(b/122876336): Remove libpac.so once it's migrated to Webview
-namespace.default.link.runtime.shared_libs += libpac.so
-namespace.default.link.runtime.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
+namespace.default.link.art.shared_libs += libpac.so
 
 namespace.default.link.resolv.shared_libs = libnetd_resolv.so
 
@@ -495,21 +497,22 @@
 namespace.default.link.neuralnetworks.shared_libs = libneuralnetworks.so
 
 ###############################################################################
-# "runtime" APEX namespace
+# "art" APEX namespace
 #
-# This namespace exposes externally accessible libraries from the Runtime APEX.
-# Keep in sync with the "runtime" namespace in art/build/apex/ld.config.txt.
+# This namespace exposes externally accessible libraries from the ART APEX.
+# Keep in sync with the "art" namespace in art/build/apex/ld.config.txt.
 ###############################################################################
-namespace.runtime.isolated = true
+namespace.art.isolated = true
 # Visible to allow links to be created at runtime, e.g. through
 # android_link_namespaces in libnativeloader.
-namespace.runtime.visible = true
+namespace.art.visible = true
 
-namespace.runtime.search.paths = /apex/com.android.runtime/${LIB}
-namespace.runtime.asan.search.paths = /apex/com.android.runtime/${LIB}
-namespace.runtime.links = default
+namespace.art.search.paths = /apex/com.android.art/${LIB}
+namespace.art.asan.search.paths = /apex/com.android.art/${LIB}
+namespace.art.links = default
 # TODO(b/130340935): Use a dynamically created linker namespace similar to
 # classloader-namespace for oat files, and tighten this up.
+namespace.runtime.link.default.allow_all_shared_libs = true
 
 ###############################################################################
 # "media" APEX namespace
@@ -544,11 +547,12 @@
 
 namespace.conscrypt.search.paths = /apex/com.android.conscrypt/${LIB}
 namespace.conscrypt.asan.search.paths = /apex/com.android.conscrypt/${LIB}
-namespace.conscrypt.links = runtime,default
-namespace.conscrypt.link.runtime.shared_libs  = libandroidio.so
+namespace.conscrypt.links = art,default
+namespace.conscrypt.link.art.shared_libs = libandroidio.so
 namespace.conscrypt.link.default.shared_libs  = libc.so
 namespace.conscrypt.link.default.shared_libs += libm.so
 namespace.conscrypt.link.default.shared_libs += libdl.so
+namespace.conscrypt.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
 
 ###############################################################################
 # "resolv" APEX namespace
@@ -566,6 +570,7 @@
 namespace.resolv.link.default.shared_libs += libm.so
 namespace.resolv.link.default.shared_libs += libdl.so
 namespace.resolv.link.default.shared_libs += libbinder_ndk.so
+namespace.resolv.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
 
 ###############################################################################
 # "neuralnetworks" APEX namespace
@@ -584,9 +589,10 @@
 namespace.neuralnetworks.link.default.shared_libs += liblog.so
 namespace.neuralnetworks.link.default.shared_libs += libm.so
 namespace.neuralnetworks.link.default.shared_libs += libnativewindow.so
+namespace.neuralnetworks.link.default.shared_libs += libneuralnetworks_packageinfo.so
 namespace.neuralnetworks.link.default.shared_libs += libsync.so
 namespace.neuralnetworks.link.default.shared_libs += libvndksupport.so
-
+namespace.neuralnetworks.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
 
 ###############################################################################
 # Namespace config for binaries under /postinstall.
diff --git a/rootdir/etc/public.libraries.android.txt b/rootdir/etc/public.libraries.android.txt
index d8f6095..405f5a9 100644
--- a/rootdir/etc/public.libraries.android.txt
+++ b/rootdir/etc/public.libraries.android.txt
@@ -1,6 +1,7 @@
 # See https://android.googlesource.com/platform/ndk/+/master/docs/PlatformApis.md
 libandroid.so
 libaaudio.so
+libamidi.so
 libbinder_ndk.so
 libc.so
 libcamera2ndk.so
@@ -16,7 +17,7 @@
 libmediandk.so
 libm.so
 libnativewindow.so
-libneuralnetworks.so
+libneuralnetworks.so nopreload
 libOpenMAXAL.so
 libOpenSLES.so
 libRS.so
diff --git a/rootdir/etc/public.libraries.iot.txt b/rootdir/etc/public.libraries.iot.txt
index 20905bf..b565340 100644
--- a/rootdir/etc/public.libraries.iot.txt
+++ b/rootdir/etc/public.libraries.iot.txt
@@ -2,6 +2,7 @@
 libandroid.so
 libandroidthings.so
 libaaudio.so
+libamidi.so
 libbinder_ndk.so
 libc.so
 libcamera2ndk.so
diff --git a/rootdir/etc/public.libraries.wear.txt b/rootdir/etc/public.libraries.wear.txt
index 4ece5b5..7cbda08 100644
--- a/rootdir/etc/public.libraries.wear.txt
+++ b/rootdir/etc/public.libraries.wear.txt
@@ -1,6 +1,7 @@
 # See https://android.googlesource.com/platform/ndk/+/master/docs/PlatformApis.md
 libandroid.so
 libaaudio.so
+libamidi.so
 libbinder_ndk.so
 libc.so
 libcamera2ndk.so
diff --git a/rootdir/fsverity_init.sh b/rootdir/fsverity_init.sh
deleted file mode 100644
index 4fee15f..0000000
--- a/rootdir/fsverity_init.sh
+++ /dev/null
@@ -1,32 +0,0 @@
-#!/system/bin/sh
-#
-# Copyright (C) 2019 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# Enforce fsverity signature checking
-echo 1 > /proc/sys/fs/verity/require_signatures
-
-# Load all keys
-for cert in /product/etc/security/fsverity/*.der; do
-  /system/bin/mini-keyctl padd asymmetric fsv_product .fs-verity < "$cert" ||
-    log -p e -t fsverity_init "Failed to load $cert"
-done
-
-DEBUGGABLE=$(getprop ro.debuggable)
-if [ $DEBUGGABLE != "1" ]; then
-  # Prevent future key links to .fs-verity keyring
-  /system/bin/mini-keyctl restrict_keyring .fs-verity ||
-    log -p e -t fsverity_init "Failed to restrict .fs-verity keyring"
-fi
diff --git a/rootdir/init.environ.rc.in b/rootdir/init.environ.rc.in
index 93b7f43..50005d9 100644
--- a/rootdir/init.environ.rc.in
+++ b/rootdir/init.environ.rc.in
@@ -5,7 +5,7 @@
     export ANDROID_ASSETS /system/app
     export ANDROID_DATA /data
     export ANDROID_STORAGE /storage
-    export ANDROID_RUNTIME_ROOT /apex/com.android.runtime
+    export ANDROID_ART_ROOT /apex/com.android.art
     export ANDROID_I18N_ROOT /apex/com.android.i18n
     export ANDROID_TZDATA_ROOT /apex/com.android.tzdata
     export EXTERNAL_STORAGE /sdcard
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 86d8042..2ec0669 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -5,11 +5,11 @@
 #
 
 import /init.environ.rc
-import /init.usb.rc
+import /system/etc/init/hw/init.usb.rc
 import /init.${ro.hardware}.rc
 import /vendor/etc/init/hw/init.${ro.hardware}.rc
-import /init.usb.configfs.rc
-import /init.${ro.zygote}.rc
+import /system/etc/init/hw/init.usb.configfs.rc
+import /system/etc/init/hw/init.${ro.zygote}.rc
 
 # Cgroups are mounted right before early-init using list from /etc/cgroups.json
 on early-init
@@ -38,12 +38,9 @@
     # Allow up to 32K FDs per process
     setrlimit nofile 32768 32768
 
-    # Create directory to keep ld.config.txt
-    mkdir /dev/linkerconfig 0755
-
     # Generate ld.config.txt for early executed processes
-    exec -- /system/bin/linkerconfig --target /dev/linkerconfig/ld.config.txt
-    chmod 444 /dev/linkerconfig/ld.config.txt
+    exec -- /system/bin/linkerconfig --target /linkerconfig/ld.config.txt
+    chmod 444 /linkerconfig/ld.config.txt
 
     start ueventd
 
@@ -52,6 +49,40 @@
     # the libraries are available to the processes started after this statement.
     exec_start apexd-bootstrap
 
+    # These must already exist by the time boringssl_self_test32 / boringssl_self_test64 run.
+    mkdir /dev/boringssl 0755 root root
+    mkdir /dev/boringssl/selftest 0755 root root
+
+# Run boringssl self test for each ABI so that later processes can skip it. http://b/139348610
+on early-init && property:ro.product.cpu.abilist32=*
+    exec_start boringssl_self_test32
+on early-init && property:ro.product.cpu.abilist64=*
+    exec_start boringssl_self_test64
+on property:apexd.status=ready && property:ro.product.cpu.abilist32=*
+    exec_start boringssl_self_test_apex32
+on property:apexd.status=ready && property:ro.product.cpu.abilist64=*
+    exec_start boringssl_self_test_apex64
+
+service boringssl_self_test32 /system/bin/boringssl_self_test32
+    setenv BORINGSSL_SELF_TEST_CREATE_FLAG true # Any nonempty value counts as true
+    reboot_on_failure reboot,boringssl-self-check-failed
+    stdio_to_kmsg
+
+service boringssl_self_test64 /system/bin/boringssl_self_test64
+    setenv BORINGSSL_SELF_TEST_CREATE_FLAG true # Any nonempty value counts as true
+    reboot_on_failure reboot,boringssl-self-check-failed
+    stdio_to_kmsg
+
+service boringssl_self_test_apex32 /apex/com.android.conscrypt/bin/boringssl_self_test32
+    setenv BORINGSSL_SELF_TEST_CREATE_FLAG true # Any nonempty value counts as true
+    reboot_on_failure reboot,boringssl-self-check-failed
+    stdio_to_kmsg
+
+service boringssl_self_test_apex64 /apex/com.android.conscrypt/bin/boringssl_self_test64
+    setenv BORINGSSL_SELF_TEST_CREATE_FLAG true # Any nonempty value counts as true
+    reboot_on_failure reboot,boringssl-self-check-failed
+    stdio_to_kmsg
+
 on init
     sysclktz 0
 
@@ -121,6 +152,17 @@
     mkdir /mnt/media_rw 0750 root media_rw
     mkdir /mnt/user 0755 root root
     mkdir /mnt/user/0 0755 root root
+    mkdir /mnt/user/0/self 0755 root root
+    mkdir /mnt/user/0/emulated 0755 root root
+    mkdir /mnt/user/0/emulated/0 0755 root root
+
+    # Prepare directories for pass through processes
+    mkdir /mnt/pass_through 0755 root root
+    mkdir /mnt/pass_through/0 0755 root root
+    mkdir /mnt/pass_through/0/self 0755 root root
+    mkdir /mnt/pass_through/0/emulated 0755 root root
+    mkdir /mnt/pass_through/0/emulated/0 0755 root root
+
     mkdir /mnt/expand 0771 system system
     mkdir /mnt/appfuse 0711 root root
 
@@ -238,6 +280,16 @@
     chmod 0664 /dev/cpuset/restricted/tasks
     chmod 0664 /dev/cpuset/tasks
 
+    # freezer cgroup entries
+    mkdir /dev/freezer/frozen
+    write /dev/freezer/frozen/freezer.state FROZEN
+    chown system system /dev/freezer/cgroup.procs
+    chown system system /dev/freezer/frozen
+    chown system system /dev/freezer/frozen/freezer.state
+    chown system system /dev/freezer/frozen/cgroup.procs
+
+    chmod 0444 /dev/freezer/frozen/freezer.state
+
     # make the PSI monitor accessible to others
     chown system system /proc/pressure/memory
     chmod 0664 /proc/pressure/memory
@@ -302,6 +354,8 @@
 
     # Start logd before any other services run to ensure we capture all of their logs.
     start logd
+    # Start lmkd before any other services run so that it can register them
+    start lmkd
 
     # Start essential services.
     start servicemanager
@@ -367,9 +421,6 @@
     # Once everything is setup, no need to modify /.
     # The bind+remount combination allows this to work in containers.
     mount rootfs rootfs / remount bind ro nodev
-    # Mount default storage into root namespace
-    mount none /mnt/runtime/default /storage bind rec
-    mount none none /storage slave rec
 
     # Make sure /sys/kernel/debug (if present) is labeled properly
     # Note that tracefs may be mounted under debug, so we need to cross filesystems
@@ -427,15 +478,10 @@
     # HALs required before storage encryption can get unlocked (FBE/FDE)
     class_start early_hal
 
-    # Check and mark a successful boot, before mounting userdata with mount_all.
-    # No-op for non-A/B device.
-    exec_start update_verifier_nonencrypted
-
 on post-fs-data
     mark_post_data
 
     # Start checkpoint before we touch data
-    start vold
     exec - system system -- /system/bin/vdc checkpoint prepareCheckpoint
 
     # We chown/chmod /data again so because mount is run as root + defaults
@@ -449,30 +495,26 @@
 
     # Start bootcharting as soon as possible after the data partition is
     # mounted to collect more data.
-    mkdir /data/bootchart 0755 shell shell
+    mkdir /data/bootchart 0755 shell shell encryption=Require
     bootchart start
 
-    # Load fsverity keys. This needs to happen before apexd, as post-install of
-    # APEXes may rely on keys.
-    exec -- /system/bin/fsverity_init
-
     # Make sure that apexd is started in the default namespace
     enter_default_mount_ns
 
     # /data/apex is now available. Start apexd to scan and activate APEXes.
-    mkdir /data/apex 0750 root system
+    mkdir /data/apex 0750 root system encryption=None
     mkdir /data/apex/active 0750 root system
     mkdir /data/apex/backup 0700 root system
     mkdir /data/apex/hashtree 0700 root system
     mkdir /data/apex/sessions 0700 root system
-    mkdir /data/app-staging 0750 system system
+    mkdir /data/app-staging 0750 system system encryption=None
     start apexd
 
     # Avoid predictable entropy pool. Carry over entropy from previous boot.
     copy /data/system/entropy.dat /dev/urandom
 
     # create basic filesystem structure
-    mkdir /data/misc 01771 system misc
+    mkdir /data/misc 01771 system misc encryption=Require
     mkdir /data/misc/recovery 0770 system log
     copy /data/misc/recovery/ro.build.fingerprint /data/misc/recovery/ro.build.fingerprint.1
     chmod 0440 /data/misc/recovery/ro.build.fingerprint.1
@@ -501,6 +543,7 @@
     mkdir /data/misc/sms 0770 system radio
     mkdir /data/misc/carrierid 0770 system radio
     mkdir /data/misc/apns 0770 system radio
+    mkdir /data/misc/emergencynumberdb 0770 system radio
     mkdir /data/misc/zoneinfo 0775 system system
     mkdir /data/misc/network_watchlist 0774 system system
     mkdir /data/misc/textclassifier 0771 system system
@@ -515,7 +558,7 @@
     mkdir /data/misc/user 0771 root root
     # give system access to wpa_supplicant.conf for backup and restore
     chmod 0660 /data/misc/wifi/wpa_supplicant.conf
-    mkdir /data/local 0751 root root
+    mkdir /data/local 0751 root root encryption=Require
     mkdir /data/misc/media 0700 media media
     mkdir /data/misc/audioserver 0700 audioserver audioserver
     mkdir /data/misc/cameraserver 0700 cameraserver cameraserver
@@ -532,91 +575,101 @@
     mkdir /data/misc/profiles/ref 0771 system system
     mkdir /data/misc/profman 0770 system shell
     mkdir /data/misc/gcov 0770 root root
+    mkdir /data/misc/installd 0700 root root
+    mkdir /data/misc/apexdata 0700 root root
+    mkdir /data/misc/apexrollback 0700 root root
 
-    mkdir /data/preloads 0775 system system
+    mkdir /data/preloads 0775 system system encryption=None
 
-    mkdir /data/vendor 0771 root root
-    mkdir /data/vendor_ce 0771 root root
-    mkdir /data/vendor_de 0771 root root
+    mkdir /data/vendor 0771 root root encryption=Require
+    mkdir /data/vendor_ce 0771 root root encryption=None
+    mkdir /data/vendor_de 0771 root root encryption=None
     mkdir /data/vendor/hardware 0771 root root
 
     # For security reasons, /data/local/tmp should always be empty.
     # Do not place files or directories in /data/local/tmp
     mkdir /data/local/tmp 0771 shell shell
     mkdir /data/local/traces 0777 shell shell
-    mkdir /data/data 0771 system system
-    mkdir /data/app-private 0771 system system
-    mkdir /data/app-ephemeral 0771 system system
-    mkdir /data/app-asec 0700 root root
-    mkdir /data/app-lib 0771 system system
-    mkdir /data/app 0771 system system
-    mkdir /data/property 0700 root root
-    mkdir /data/tombstones 0771 system system
+    mkdir /data/data 0771 system system encryption=None
+    mkdir /data/app-private 0771 system system encryption=Require
+    mkdir /data/app-ephemeral 0771 system system encryption=Require
+    mkdir /data/app-asec 0700 root root encryption=Require
+    mkdir /data/app-lib 0771 system system encryption=Require
+    mkdir /data/app 0771 system system encryption=Require
+    mkdir /data/property 0700 root root encryption=Require
+    mkdir /data/tombstones 0771 system system encryption=Require
     mkdir /data/vendor/tombstones 0771 root root
     mkdir /data/vendor/tombstones/wifi 0771 wifi wifi
 
     # create dalvik-cache, so as to enforce our permissions
-    mkdir /data/dalvik-cache 0771 root root
+    mkdir /data/dalvik-cache 0771 root root encryption=Require
     # create the A/B OTA directory, so as to enforce our permissions
-    mkdir /data/ota 0771 root root
+    mkdir /data/ota 0771 root root encryption=Require
 
     # create the OTA package directory. It will be accessed by GmsCore (cache
     # group), update_engine and update_verifier.
-    mkdir /data/ota_package 0770 system cache
+    mkdir /data/ota_package 0770 system cache encryption=Require
 
     # create resource-cache and double-check the perms
-    mkdir /data/resource-cache 0771 system system
+    mkdir /data/resource-cache 0771 system system encryption=Require
     chown system system /data/resource-cache
     chmod 0771 /data/resource-cache
 
     # create the lost+found directories, so as to enforce our permissions
-    mkdir /data/lost+found 0770 root root
+    mkdir /data/lost+found 0770 root root encryption=None
 
     # create directory for DRM plug-ins - give drm the read/write access to
     # the following directory.
-    mkdir /data/drm 0770 drm drm
+    mkdir /data/drm 0770 drm drm encryption=Require
 
     # create directory for MediaDrm plug-ins - give drm the read/write access to
     # the following directory.
-    mkdir /data/mediadrm 0770 mediadrm mediadrm
+    mkdir /data/mediadrm 0770 mediadrm mediadrm encryption=Require
 
-    mkdir /data/anr 0775 system system
+    mkdir /data/anr 0775 system system encryption=Require
 
     # NFC: create data/nfc for nv storage
-    mkdir /data/nfc 0770 nfc nfc
+    mkdir /data/nfc 0770 nfc nfc encryption=Require
     mkdir /data/nfc/param 0770 nfc nfc
 
     # Create all remaining /data root dirs so that they are made through init
     # and get proper encryption policy installed
-    mkdir /data/backup 0700 system system
-    mkdir /data/ss 0700 system system
+    mkdir /data/backup 0700 system system encryption=Require
+    mkdir /data/ss 0700 system system encryption=Require
 
-    mkdir /data/system 0775 system system
+    mkdir /data/system 0775 system system encryption=Require
     mkdir /data/system/dropbox 0700 system system
     mkdir /data/system/heapdump 0700 system system
     mkdir /data/system/users 0775 system system
 
-    mkdir /data/system_de 0770 system system
-    mkdir /data/system_ce 0770 system system
+    mkdir /data/system_de 0770 system system encryption=None
+    mkdir /data/system_ce 0770 system system encryption=None
 
-    mkdir /data/misc_de 01771 system misc
-    mkdir /data/misc_ce 01771 system misc
+    mkdir /data/misc_de 01771 system misc encryption=None
+    mkdir /data/misc_ce 01771 system misc encryption=None
 
-    mkdir /data/user 0711 system system
-    mkdir /data/user_de 0711 system system
+    mkdir /data/user 0711 system system encryption=None
+    mkdir /data/user_de 0711 system system encryption=None
     symlink /data/data /data/user/0
 
-    mkdir /data/media 0770 media_rw media_rw
-    mkdir /data/media/obb 0770 media_rw media_rw
+    # Special-case /data/media/obb per b/64566063
+    mkdir /data/media 0770 media_rw media_rw encryption=None
+    mkdir /data/media/obb 0770 media_rw media_rw encryption=Attempt
 
-    mkdir /data/cache 0770 system cache
+    mkdir /data/cache 0770 system cache encryption=Require
     mkdir /data/cache/recovery 0770 system cache
     mkdir /data/cache/backup_stage 0700 system system
     mkdir /data/cache/backup 0700 system system
 
+    # Delete these if need be, per b/139193659
+    mkdir /data/rollback 0700 system system encryption=DeleteIfNecessary
+    mkdir /data/rollback-observer 0700 system system encryption=DeleteIfNecessary
+
     # Wait for apexd to finish activating APEXes before starting more processes.
     wait_for_prop apexd.status ready
-    parse_apex_configs
+    perform_apex_config
+
+    exec_start derive_sdk
 
     init_user0
 
@@ -642,19 +695,41 @@
     chown root system /dev/fscklogs/log
     chmod 0770 /dev/fscklogs/log
 
+# Switch between sdcardfs and FUSE depending on persist property
+# TODO: Move this to ro property before launch because FDE devices
+# interact with persistent properties differently during boot
+on zygote-start && property:persist.sys.fuse=true
+  # Mount default storage into root namespace
+  mount none /mnt/user/0 /storage bind rec
+  mount none none /storage slave rec
+on zygote-start && property:persist.sys.fuse=false
+  # Mount default storage into root namespace
+  mount none /mnt/runtime/default /storage bind rec
+  mount none none /storage slave rec
+on zygote-start && property:persist.sys.fuse=""
+  # Mount default storage into root namespace
+  mount none /mnt/runtime/default /storage bind rec
+  mount none none /storage slave rec
+
 # It is recommended to put unnecessary data/ initialization from post-fs-data
 # to start-zygote in device's init.rc to unblock zygote start.
 on zygote-start && property:ro.crypto.state=unencrypted
+    # A/B update verifier that marks a successful boot.
+    exec_start update_verifier_nonencrypted
     start netd
     start zygote
     start zygote_secondary
 
 on zygote-start && property:ro.crypto.state=unsupported
+    # A/B update verifier that marks a successful boot.
+    exec_start update_verifier_nonencrypted
     start netd
     start zygote
     start zygote_secondary
 
 on zygote-start && property:ro.crypto.state=encrypted && property:ro.crypto.type=file
+    # A/B update verifier that marks a successful boot.
+    exec_start update_verifier_nonencrypted
     start netd
     start zygote
     start zygote_secondary
@@ -678,6 +753,12 @@
     chown root system /sys/module/lowmemorykiller/parameters/minfree
     chmod 0664 /sys/module/lowmemorykiller/parameters/minfree
 
+    # System server manages zram writeback
+    chown root system /sys/block/zram0/idle
+    chmod 0664 /sys/block/zram0/idle
+    chown root system /sys/block/zram0/writeback
+    chmod 0664 /sys/block/zram0/writeback
+
     # Tweak background writeout
     write /proc/sys/vm/dirty_expire_centisecs 200
     write /proc/sys/vm/dirty_background_ratio  5
@@ -687,13 +768,14 @@
     # to make it too large, since it may bring userdata loss, if they
     # are not aware of using fsync()/sync() to prepare sudden power-cut.
     write /sys/fs/f2fs/${dev.mnt.blk.data}/cp_interval 200
+    write /sys/fs/f2fs/${dev.mnt.blk.data}/gc_urgent_sleep_time 50
+
+    # limit discard size to 128MB in order to avoid long IO latency
+    # for filesystem tuning first (dm or sda)
+    # Note that, if dm-<num> is used, sda/mmcblk0 should be tuned in vendor/init.rc
+    write /sys/devices/virtual/block/${dev.mnt.blk.data}/queue/discard_max_bytes 134217728
 
     # Permissions for System Server and daemons.
-    chown radio system /sys/android_power/state
-    chown radio system /sys/android_power/request_state
-    chown radio system /sys/android_power/acquire_full_wake_lock
-    chown radio system /sys/android_power/acquire_partial_wake_lock
-    chown radio system /sys/android_power/release_wake_lock
     chown system system /sys/power/autosleep
 
     chown system system /sys/devices/system/cpu/cpufreq/interactive/timer_rate
@@ -757,6 +839,9 @@
 
     class_start core
 
+    # Requires keystore (currently a core service) to be ready first.
+    exec -- /system/bin/fsverity_init
+
 on nonencrypted
     class_start main
     class_start late_start
@@ -777,6 +862,8 @@
     trigger zygote-start
 
 on property:vold.decrypt=trigger_restart_min_framework
+    # A/B update verifier that marks a successful boot.
+    exec_start update_verifier
     class_start main
 
 on property:vold.decrypt=trigger_restart_framework
@@ -797,6 +884,9 @@
 
 on property:sys.boot_completed=1
     bootchart stop
+    # Setup per_boot directory so other .rc could start to use it on boot_completed
+    exec - system system -- /bin/rm -rf /data/per_boot
+    mkdir /data/per_boot 0700 system system encryption=Require key=per_boot_ref
 
 # system server cannot write to /proc/sys files,
 # and chown/chmod does not work for /proc/sys/ entries.
@@ -844,8 +934,31 @@
     chmod 0773 /data/misc/trace
     # Give reads to anyone for the window trace folder on debug builds.
     chmod 0775 /data/misc/wmtrace
+
+on init && property:ro.debuggable=1
     start console
 
-service flash_recovery /system/bin/install-recovery.sh
-    class main
-    oneshot
+on userspace-reboot-requested
+  # TODO(b/135984674): reset all necessary properties here.
+  setprop sys.boot_completed 0
+  setprop sys.init.updatable_crashing 0
+  setprop apexd.status ""
+
+on userspace-reboot-fs-remount
+  # Make sure that vold is running.
+  # This is mostly a precaution measure in case vold for some reason wasn't running when
+  # userspace reboot was initiated.
+  start vold
+  exec - system system -- /system/bin/vdc checkpoint resetCheckpoint
+  exec - system system -- /system/bin/vdc checkpoint markBootAttempt
+  remount_userdata
+
+on userspace-reboot-resume
+  trigger userspace-reboot-fs-remount
+  trigger post-fs-data
+  trigger zygote-start
+  trigger early-boot
+  trigger boot
+
+on property:sys.boot_completed=1 && property:sys.init.userspace_reboot.in_progress=1
+  finish_userspace_reboot
diff --git a/rootdir/init.usb.rc b/rootdir/init.usb.rc
index f0681d2..a1888fc 100644
--- a/rootdir/init.usb.rc
+++ b/rootdir/init.usb.rc
@@ -9,13 +9,14 @@
     chown system system /sys/class/android_usb/android0/f_rndis/ethaddr
     chmod 0660 /sys/class/android_usb/android0/f_rndis/ethaddr
     mkdir /data/misc/adb 02750 system shell
-    mkdir /data/adb 0700 root root
+    mkdir /data/adb 0700 root root encryption=Require
 
 # adbd is controlled via property triggers in init.<platform>.usb.rc
 service adbd /system/bin/adbd --root_seclabel=u:r:su:s0
     class core
-    socket adbd stream 660 system system
+    socket adbd seqpacket 660 system system
     disabled
+    updatable
     seclabel u:r:adbd:s0
 
 on boot
diff --git a/rootdir/init.zygote32.rc b/rootdir/init.zygote32.rc
index f8e680d..9adbcba 100644
--- a/rootdir/init.zygote32.rc
+++ b/rootdir/init.zygote32.rc
@@ -4,8 +4,7 @@
     user root
     group root readproc reserved_disk
     socket zygote stream 660 root system
-    socket blastula_pool stream 660 root system
-    onrestart write /sys/android_power/request_state wake
+    socket usap_pool_primary stream 660 root system
     onrestart write /sys/power/state on
     onrestart restart audioserver
     onrestart restart cameraserver
diff --git a/rootdir/init.zygote32_64.rc b/rootdir/init.zygote32_64.rc
index 0235370..f6149c9 100644
--- a/rootdir/init.zygote32_64.rc
+++ b/rootdir/init.zygote32_64.rc
@@ -4,8 +4,7 @@
     user root
     group root readproc reserved_disk
     socket zygote stream 660 root system
-    socket blastula_pool stream 660 root system
-    onrestart write /sys/android_power/request_state wake
+    socket usap_pool_primary stream 660 root system
     onrestart write /sys/power/state on
     onrestart restart audioserver
     onrestart restart cameraserver
@@ -20,6 +19,6 @@
     user root
     group root readproc reserved_disk
     socket zygote_secondary stream 660 root system
-    socket blastula_pool_secondary stream 660 root system
+    socket usap_pool_secondary stream 660 root system
     onrestart restart zygote
     writepid /dev/cpuset/foreground/tasks
diff --git a/rootdir/init.zygote64.rc b/rootdir/init.zygote64.rc
index 3f3cc15..0e69b16 100644
--- a/rootdir/init.zygote64.rc
+++ b/rootdir/init.zygote64.rc
@@ -4,8 +4,7 @@
     user root
     group root readproc reserved_disk
     socket zygote stream 660 root system
-    socket blastula_pool stream 660 root system
-    onrestart write /sys/android_power/request_state wake
+    socket usap_pool_primary stream 660 root system
     onrestart write /sys/power/state on
     onrestart restart audioserver
     onrestart restart cameraserver
diff --git a/rootdir/init.zygote64_32.rc b/rootdir/init.zygote64_32.rc
index fae38c9..3e80168 100644
--- a/rootdir/init.zygote64_32.rc
+++ b/rootdir/init.zygote64_32.rc
@@ -4,8 +4,7 @@
     user root
     group root readproc reserved_disk
     socket zygote stream 660 root system
-    socket blastula_pool stream 660 root system
-    onrestart write /sys/android_power/request_state wake
+    socket usap_pool_primary stream 660 root system
     onrestart write /sys/power/state on
     onrestart restart audioserver
     onrestart restart cameraserver
@@ -20,6 +19,6 @@
     user root
     group root readproc reserved_disk
     socket zygote_secondary stream 660 root system
-    socket blastula_pool_secondary stream 660 root system
+    socket usap_pool_secondary stream 660 root system
     onrestart restart zygote
     writepid /dev/cpuset/foreground/tasks
diff --git a/rootdir/ueventd.rc b/rootdir/ueventd.rc
index 451f5ad..9c2cdf2 100644
--- a/rootdir/ueventd.rc
+++ b/rootdir/ueventd.rc
@@ -33,7 +33,7 @@
 /dev/urandom              0666   root       root
 # Make HW RNG readable by group system to let EntropyMixer read it.
 /dev/hw_random            0440   root       system
-/dev/ashmem               0666   root       root
+/dev/ashmem*              0666   root       root
 /dev/binder               0666   root       root
 /dev/hwbinder             0666   root       root
 /dev/vndbinder            0666   root       root
diff --git a/rootdir/update_and_install_ld_config.mk b/rootdir/update_and_install_ld_config.mk
index dbe60e5..44f7b65 100644
--- a/rootdir/update_and_install_ld_config.mk
+++ b/rootdir/update_and_install_ld_config.mk
@@ -38,8 +38,8 @@
 
 llndk_libraries_file := $(library_lists_dir)/llndk.libraries.$(vndk_version).txt
 vndksp_libraries_file := $(library_lists_dir)/vndksp.libraries.$(vndk_version).txt
-vndkcore_libraries_file := $(library_lists_dir)/vndkcore.libraries.txt
-vndkprivate_libraries_file := $(library_lists_dir)/vndkprivate.libraries.txt
+vndkcore_libraries_file := $(library_lists_dir)/vndkcore.libraries.$(vndk_version).txt
+vndkprivate_libraries_file := $(library_lists_dir)/vndkprivate.libraries.$(vndk_version).txt
 llndk_moved_to_apex_libraries_file := $(library_lists_dir)/llndkinapex.libraries.txt
 ifeq ($(my_vndk_use_core_variant),true)
 vndk_using_core_variant_libraries_file := $(library_lists_dir)/vndk_using_core_variant.libraries.$(vndk_version).txt
@@ -70,19 +70,30 @@
 # /system image.
 llndk_libraries_moved_to_apex_list:=$(LLNDK_MOVED_TO_APEX_LIBRARIES)
 
+# Returns the unique installed basenames of a module, or module.so if there are
+# none.  The guess is to handle cases like libc, where the module itself is
+# marked uninstallable but a symlink is installed with the name libc.so.
 # $(1): list of libraries
-# $(2): output file to write the list of libraries to
-define write-libs-to-file
-$(2): PRIVATE_LIBRARIES := $(1)
-$(2):
-	echo -n > $$@ && $$(foreach lib,$$(PRIVATE_LIBRARIES),echo $$(lib).so >> $$@;)
+# $(2): suffix to to add to each library (not used for guess)
+define module-installed-files-or-guess
+$(foreach lib,$(1),$(or $(strip $(sort $(notdir $(call module-installed-files,$(lib)$(2))))),$(lib).so))
 endef
-$(eval $(call write-libs-to-file,$(llndk_libraries_list),$(llndk_libraries_file)))
-$(eval $(call write-libs-to-file,$(vndksp_libraries_list),$(vndksp_libraries_file)))
-$(eval $(call write-libs-to-file,$(VNDK_CORE_LIBRARIES),$(vndkcore_libraries_file)))
-$(eval $(call write-libs-to-file,$(VNDK_PRIVATE_LIBRARIES),$(vndkprivate_libraries_file)))
+
+# $(1): list of libraries
+# $(2): suffix to add to each library
+# $(3): output file to write the list of libraries to
+define write-libs-to-file
+$(3): PRIVATE_LIBRARIES := $(1)
+$(3): PRIVATE_SUFFIX := $(2)
+$(3):
+	echo -n > $$@ && $$(foreach so,$$(call module-installed-files-or-guess,$$(PRIVATE_LIBRARIES),$$(PRIVATE_SUFFIX)),echo $$(so) >> $$@;)
+endef
+$(eval $(call write-libs-to-file,$(llndk_libraries_list),,$(llndk_libraries_file)))
+$(eval $(call write-libs-to-file,$(vndksp_libraries_list),.vendor,$(vndksp_libraries_file)))
+$(eval $(call write-libs-to-file,$(VNDK_CORE_LIBRARIES),.vendor,$(vndkcore_libraries_file)))
+$(eval $(call write-libs-to-file,$(VNDK_PRIVATE_LIBRARIES),.vendor,$(vndkprivate_libraries_file)))
 ifeq ($(my_vndk_use_core_variant),true)
-$(eval $(call write-libs-to-file,$(VNDK_USING_CORE_VARIANT_LIBRARIES),$(vndk_using_core_variant_libraries_file)))
+$(eval $(call write-libs-to-file,$(VNDK_USING_CORE_VARIANT_LIBRARIES),,$(vndk_using_core_variant_libraries_file)))
 endif
 endif # ifneq ($(lib_list_from_prebuilts),true)
 
@@ -117,7 +128,7 @@
 deps := $(llndk_libraries_file) $(vndksp_libraries_file) $(vndkcore_libraries_file) \
   $(vndkprivate_libraries_file)
 ifeq ($(check_backward_compatibility),true)
-deps += $(compatibility_check_script)
+deps += $(compatibility_check_script) $(wildcard prebuilts/vndk/*/*/configs/ld.config.*.txt)
 endif
 ifeq ($(my_vndk_use_core_variant),true)
 $(LOCAL_BUILT_MODULE): PRIVATE_VNDK_USING_CORE_VARIANT_LIBRARIES_FILE := $(vndk_using_core_variant_libraries_file)
diff --git a/sdcard/sdcard.cpp b/sdcard/sdcard.cpp
index 2b35819..622de5b 100644
--- a/sdcard/sdcard.cpp
+++ b/sdcard/sdcard.cpp
@@ -315,7 +315,8 @@
         PLOG(ERROR) << "setting RLIMIT_NOFILE failed";
     }
 
-    while ((fs_read_atomic_int("/data/.layout_version", &fs_version) == -1) || (fs_version < 3)) {
+    while ((fs_read_atomic_int("/data/misc/installd/layout_version", &fs_version) == -1) ||
+           (fs_version < 3)) {
         LOG(ERROR) << "installd fs upgrade not yet complete; waiting...";
         sleep(1);
     }
diff --git a/libmemunreachable/.clang-format b/set-verity-state/.clang-format
similarity index 100%
rename from libmemunreachable/.clang-format
rename to set-verity-state/.clang-format
diff --git a/set-verity-state/Android.bp b/set-verity-state/Android.bp
new file mode 100644
index 0000000..cd8c8c5
--- /dev/null
+++ b/set-verity-state/Android.bp
@@ -0,0 +1,24 @@
+// Copyright 2019 The Android Open Source Project
+
+cc_binary {
+    name: "set-verity-state",
+    srcs: ["set-verity-state.cpp"],
+    shared_libs: [
+        "libbase",
+        "libcrypto",
+        "libcrypto_utils",
+        "libcutils",
+        "libfec",
+        "libfs_mgr",
+        "liblog",
+    ],
+    static_libs: [
+        "libavb_user",
+    ],
+
+    cflags: ["-Werror"],
+    symlinks: [
+        "enable-verity",
+        "disable-verity",
+    ],
+}
diff --git a/set-verity-state/set-verity-state.cpp b/set-verity-state/set-verity-state.cpp
new file mode 100644
index 0000000..0a26aba
--- /dev/null
+++ b/set-verity-state/set-verity-state.cpp
@@ -0,0 +1,274 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <libavb_user/libavb_user.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android-base/stringprintf.h>
+#include <android-base/unique_fd.h>
+#include <fs_mgr.h>
+#include <fs_mgr_overlayfs.h>
+#include <fstab/fstab.h>
+#include <log/log_properties.h>
+
+#include "fec/io.h"
+
+#ifdef ALLOW_DISABLE_VERITY
+static const bool kAllowDisableVerity = true;
+#else
+static const bool kAllowDisableVerity = false;
+#endif
+
+using android::base::unique_fd;
+
+static void suggest_run_adb_root() {
+  if (getuid() != 0) printf("Maybe run adb root?\n");
+}
+
+static bool make_block_device_writable(const std::string& dev) {
+  unique_fd fd(open(dev.c_str(), O_RDONLY | O_CLOEXEC));
+  if (fd == -1) {
+    return false;
+  }
+
+  int OFF = 0;
+  bool result = (ioctl(fd.get(), BLKROSET, &OFF) != -1);
+  return result;
+}
+
+/* Turn verity on/off */
+static bool set_verity_enabled_state(const char* block_device, const char* mount_point,
+                                     bool enable) {
+  if (!make_block_device_writable(block_device)) {
+    printf("Could not make block device %s writable (%s).\n", block_device, strerror(errno));
+    return false;
+  }
+
+  fec::io fh(block_device, O_RDWR);
+
+  if (!fh) {
+    printf("Could not open block device %s (%s).\n", block_device, strerror(errno));
+    suggest_run_adb_root();
+    return false;
+  }
+
+  fec_verity_metadata metadata;
+
+  if (!fh.get_verity_metadata(metadata)) {
+    printf("Couldn't find verity metadata!\n");
+    return false;
+  }
+
+  if (!enable && metadata.disabled) {
+    printf("Verity already disabled on %s\n", mount_point);
+    return false;
+  }
+
+  if (enable && !metadata.disabled) {
+    printf("Verity already enabled on %s\n", mount_point);
+    return false;
+  }
+
+  if (!fh.set_verity_status(enable)) {
+    printf("Could not set verity %s flag on device %s with error %s\n",
+           enable ? "enabled" : "disabled", block_device, strerror(errno));
+    return false;
+  }
+
+  auto change = false;
+  errno = 0;
+  if (enable ? fs_mgr_overlayfs_teardown(mount_point, &change)
+             : fs_mgr_overlayfs_setup(nullptr, mount_point, &change)) {
+    if (change) {
+      printf("%s overlayfs for %s\n", enable ? "disabling" : "using", mount_point);
+    }
+  } else if (errno) {
+    int expected_errno = enable ? EBUSY : ENOENT;
+    if (errno != expected_errno) {
+      printf("Overlayfs %s for %s failed with error %s\n", enable ? "teardown" : "setup",
+             mount_point, strerror(errno));
+    }
+  }
+  printf("Verity %s on %s\n", enable ? "enabled" : "disabled", mount_point);
+  return true;
+}
+
+/* Helper function to get A/B suffix, if any. If the device isn't
+ * using A/B the empty string is returned. Otherwise either "_a",
+ * "_b", ... is returned.
+ */
+static std::string get_ab_suffix() {
+  return android::base::GetProperty("ro.boot.slot_suffix", "");
+}
+
+static bool is_avb_device_locked() {
+  return android::base::GetProperty("ro.boot.vbmeta.device_state", "") == "locked";
+}
+
+static bool overlayfs_setup(bool enable) {
+  auto change = false;
+  errno = 0;
+  if (enable ? fs_mgr_overlayfs_teardown(nullptr, &change)
+             : fs_mgr_overlayfs_setup(nullptr, nullptr, &change)) {
+    if (change) {
+      printf("%s overlayfs\n", enable ? "disabling" : "using");
+    }
+  } else if (errno) {
+    printf("Overlayfs %s failed with error %s\n", enable ? "teardown" : "setup", strerror(errno));
+    suggest_run_adb_root();
+  }
+  return change;
+}
+
+/* Use AVB to turn verity on/off */
+static bool set_avb_verity_enabled_state(AvbOps* ops, bool enable_verity) {
+  std::string ab_suffix = get_ab_suffix();
+  bool verity_enabled;
+
+  if (is_avb_device_locked()) {
+    printf("Device is locked. Please unlock the device first\n");
+    return false;
+  }
+
+  if (!avb_user_verity_get(ops, ab_suffix.c_str(), &verity_enabled)) {
+    printf("Error getting verity state. Try adb root first?\n");
+    return false;
+  }
+
+  if ((verity_enabled && enable_verity) || (!verity_enabled && !enable_verity)) {
+    printf("verity is already %s\n", verity_enabled ? "enabled" : "disabled");
+    return false;
+  }
+
+  if (!avb_user_verity_set(ops, ab_suffix.c_str(), enable_verity)) {
+    printf("Error setting verity\n");
+    return false;
+  }
+
+  overlayfs_setup(enable_verity);
+  printf("Successfully %s verity\n", enable_verity ? "enabled" : "disabled");
+  return true;
+}
+
+int main(int argc, char* argv[]) {
+  if (argc == 0) {
+    LOG(FATAL) << "set-verity-state called with empty argv";
+  }
+
+  std::optional<bool> enable_opt;
+  std::string procname = android::base::Basename(argv[0]);
+  if (procname == "enable-verity") {
+    enable_opt = true;
+  } else if (procname == "disable-verity") {
+    enable_opt = false;
+  }
+
+  if (!enable_opt.has_value()) {
+    if (argc != 2) {
+      printf("usage: %s [1|0]\n", argv[0]);
+      return 1;
+    }
+
+    if (strcmp(argv[1], "1") == 0) {
+      enable_opt = true;
+    } else if (strcmp(argv[1], "0") == 0) {
+      enable_opt = false;
+    } else {
+      printf("usage: %s [1|0]\n", argv[0]);
+      return 1;
+    }
+  }
+
+  bool enable = enable_opt.value();
+
+  bool any_changed = false;
+
+  // Figure out if we're using VB1.0 or VB2.0 (aka AVB) - by
+  // contract, androidboot.vbmeta.digest is set by the bootloader
+  // when using AVB).
+  bool using_avb = !android::base::GetProperty("ro.boot.vbmeta.digest", "").empty();
+
+  // If using AVB, dm-verity is used on any build so we want it to
+  // be possible to disable/enable on any build (except USER). For
+  // VB1.0 dm-verity is only enabled on certain builds.
+  if (!using_avb) {
+    if (!kAllowDisableVerity) {
+      printf("%s only works for userdebug builds\n", argv[0]);
+    }
+
+    if (!android::base::GetBoolProperty("ro.secure", false)) {
+      overlayfs_setup(enable);
+      printf("verity not enabled - ENG build\n");
+      return 0;
+    }
+  }
+
+  // Should never be possible to disable dm-verity on a USER build
+  // regardless of using AVB or VB1.0.
+  if (!__android_log_is_debuggable()) {
+    printf("verity cannot be disabled/enabled - USER build\n");
+    return 0;
+  }
+
+  if (using_avb) {
+    // Yep, the system is using AVB.
+    AvbOps* ops = avb_ops_user_new();
+    if (ops == nullptr) {
+      printf("Error getting AVB ops\n");
+      return 1;
+    }
+    if (set_avb_verity_enabled_state(ops, enable)) {
+      any_changed = true;
+    }
+    avb_ops_user_free(ops);
+  } else {
+    // Not using AVB - assume VB1.0.
+
+    // read all fstab entries at once from all sources
+    android::fs_mgr::Fstab fstab;
+    if (!android::fs_mgr::ReadDefaultFstab(&fstab)) {
+      printf("Failed to read fstab\n");
+      suggest_run_adb_root();
+      return 0;
+    }
+
+    // Loop through entries looking for ones that verity manages.
+    for (const auto& entry : fstab) {
+      if (entry.fs_mgr_flags.verify) {
+        if (set_verity_enabled_state(entry.blk_device.c_str(), entry.mount_point.c_str(), enable)) {
+          any_changed = true;
+        }
+      }
+    }
+  }
+  if (!any_changed) any_changed = overlayfs_setup(enable);
+
+  if (any_changed) {
+    printf("Now reboot your device for settings to take effect\n");
+  }
+
+  return 0;
+}
diff --git a/shell_and_utilities/Android.bp b/shell_and_utilities/Android.bp
index 694b50e..ec4f6ab 100644
--- a/shell_and_utilities/Android.bp
+++ b/shell_and_utilities/Android.bp
@@ -25,7 +25,7 @@
         "tcpdump",
         "toolbox",
         "toybox",
-        "unzip",
+        "ziptool",
     ],
 }
 
diff --git a/storaged/Android.bp b/storaged/Android.bp
index 733b60f..cc19481 100644
--- a/storaged/Android.bp
+++ b/storaged/Android.bp
@@ -24,8 +24,6 @@
         "libbinder",
         "libcutils",
         "libhidlbase",
-        "libhidltransport",
-        "libhwbinder",
         "liblog",
         "libprotobuf-cpp-lite",
         "libsysutils",
diff --git a/storaged/storaged_info.cpp b/storaged/storaged_info.cpp
index ca2421b..6668cf3 100644
--- a/storaged/storaged_info.cpp
+++ b/storaged/storaged_info.cpp
@@ -41,7 +41,6 @@
 using android::hardware::health::V2_0::StorageInfo;
 
 const string emmc_info_t::emmc_sysfs = "/sys/bus/mmc/devices/mmc0:0001/";
-const string emmc_info_t::emmc_debugfs = "/d/mmc0/mmc0:0001/ext_csd";
 const char* emmc_info_t::emmc_ver_str[9] = {
     "4.0", "4.1", "4.2", "4.3", "Obsolete", "4.41", "4.5", "5.0", "5.1"
 };
@@ -62,10 +61,8 @@
     if (healthService != nullptr) {
         return new health_storage_info_t(healthService);
     }
-    if (FileExists(emmc_info_t::emmc_sysfs) ||
-        FileExists(emmc_info_t::emmc_debugfs)) {
-        return new emmc_info_t;
-    }
+    if (FileExists(emmc_info_t::emmc_sysfs)) return new emmc_info_t;
+
     if (FileExists(ufs_info_t::health_file)) {
         return new ufs_info_t;
     }
@@ -241,8 +238,7 @@
 
 void emmc_info_t::report()
 {
-    if (!report_sysfs() && !report_debugfs())
-        return;
+    if (!report_sysfs()) return;
 
     publish();
 }
@@ -284,54 +280,6 @@
     return true;
 }
 
-namespace {
-
-const size_t EXT_CSD_FILE_MIN_SIZE = 1024;
-/* 2 characters in string for each byte */
-const size_t EXT_CSD_REV_IDX = 192 * 2;
-const size_t EXT_PRE_EOL_INFO_IDX = 267 * 2;
-const size_t EXT_DEVICE_LIFE_TIME_EST_A_IDX = 268 * 2;
-const size_t EXT_DEVICE_LIFE_TIME_EST_B_IDX = 269 * 2;
-
-} // namespace
-
-bool emmc_info_t::report_debugfs()
-{
-    string buffer;
-    uint16_t rev = 0;
-
-    if (!ReadFileToString(emmc_debugfs, &buffer) ||
-        buffer.length() < (size_t)EXT_CSD_FILE_MIN_SIZE) {
-        return false;
-    }
-
-    string str = buffer.substr(EXT_CSD_REV_IDX, 2);
-    if (!ParseUint(str, &rev) ||
-        rev < 7 || rev > ARRAY_SIZE(emmc_ver_str)) {
-        return false;
-    }
-
-    version = "emmc ";
-    version += emmc_ver_str[rev];
-
-    str = buffer.substr(EXT_PRE_EOL_INFO_IDX, 2);
-    if (!ParseUint(str, &eol)) {
-        return false;
-    }
-
-    str = buffer.substr(EXT_DEVICE_LIFE_TIME_EST_A_IDX, 2);
-    if (!ParseUint(str, &lifetime_a)) {
-        return false;
-    }
-
-    str = buffer.substr(EXT_DEVICE_LIFE_TIME_EST_B_IDX, 2);
-    if (!ParseUint(str, &lifetime_b)) {
-        return false;
-    }
-
-    return true;
-}
-
 void ufs_info_t::report()
 {
     string buffer;
diff --git a/trusty/OWNERS b/trusty/OWNERS
index e807d71..1fb473e 100644
--- a/trusty/OWNERS
+++ b/trusty/OWNERS
@@ -2,6 +2,8 @@
 dkrahn@google.com
 drewry@google.com
 gmar@google.com
+mmaurer@google.com
 ncbray@google.com
-rpere@google.com
 swillden@google.com
+trong@google.com
+wenhaowang@google.com
diff --git a/trusty/gatekeeper/Android.bp b/trusty/gatekeeper/Android.bp
index 1666cfb..e553af1 100644
--- a/trusty/gatekeeper/Android.bp
+++ b/trusty/gatekeeper/Android.bp
@@ -42,7 +42,6 @@
         "android.hardware.gatekeeper@1.0",
         "libbase",
         "libhidlbase",
-        "libhidltransport",
         "libgatekeeper",
         "libutils",
         "liblog",
diff --git a/trusty/keymaster/4.0/TrustyKeymaster4Device.cpp b/trusty/keymaster/4.0/TrustyKeymaster4Device.cpp
index b5fc6bf..ec2ba12 100644
--- a/trusty/keymaster/4.0/TrustyKeymaster4Device.cpp
+++ b/trusty/keymaster/4.0/TrustyKeymaster4Device.cpp
@@ -17,6 +17,7 @@
 
 #define LOG_TAG "android.hardware.keymaster@4.0-impl.trusty"
 
+#include <android/hardware/keymaster/3.0/IKeymasterDevice.h>
 #include <authorization_set.h>
 #include <cutils/log.h>
 #include <keymaster/android_keymaster_messages.h>
@@ -46,6 +47,9 @@
 using ::keymaster::UpdateOperationResponse;
 using ::keymaster::ng::Tag;
 
+typedef ::android::hardware::keymaster::V3_0::Tag Tag3;
+using ::android::hardware::keymaster::V4_0::Constants;
+
 namespace keymaster {
 namespace V4_0 {
 namespace {
@@ -79,6 +83,45 @@
     return keymaster_tag_get_type(tag);
 }
 
+/*
+ * injectAuthToken translates a KM4 authToken into a legacy AUTH_TOKEN tag
+ *
+ * Currently, system/keymaster's reference implementation only accepts this
+ * method for passing an auth token, so until that changes we need to
+ * translate to the old format.
+ */
+inline hidl_vec<KeyParameter> injectAuthToken(const hidl_vec<KeyParameter>& keyParamsBase,
+                                              const HardwareAuthToken& authToken) {
+    std::vector<KeyParameter> keyParams(keyParamsBase);
+    const size_t mac_len = static_cast<size_t>(Constants::AUTH_TOKEN_MAC_LENGTH);
+    /*
+     * mac.size() == 0 indicates no token provided, so we should not copy.
+     * mac.size() != mac_len means it is incompatible with the old
+     *   hw_auth_token_t structure. This is forbidden by spec, but to be safe
+     *   we only copy if mac.size() == mac_len, e.g. there is an authToken
+     *   with a hw_auth_token_t compatible MAC.
+     */
+    if (authToken.mac.size() == mac_len) {
+        KeyParameter p;
+        p.tag = static_cast<Tag>(Tag3::AUTH_TOKEN);
+        p.blob.resize(sizeof(hw_auth_token_t));
+
+        hw_auth_token_t* auth_token = reinterpret_cast<hw_auth_token_t*>(p.blob.data());
+        auth_token->version = 0;
+        auth_token->challenge = authToken.challenge;
+        auth_token->user_id = authToken.userId;
+        auth_token->authenticator_id = authToken.authenticatorId;
+        auth_token->authenticator_type =
+                htobe32(static_cast<uint32_t>(authToken.authenticatorType));
+        auth_token->timestamp = htobe64(authToken.timestamp);
+        static_assert(mac_len == sizeof(auth_token->hmac));
+        memcpy(auth_token->hmac, authToken.mac.data(), mac_len);
+        keyParams.push_back(p);
+    }
+
+    return hidl_vec<KeyParameter>(std::move(keyParams));
+}
+
 class KmParamSet : public keymaster_key_param_set_t {
   public:
     KmParamSet(const hidl_vec<KeyParameter>& keyParams) {
@@ -472,11 +515,11 @@
 Return<void> TrustyKeymaster4Device::begin(KeyPurpose purpose, const hidl_vec<uint8_t>& key,
                                            const hidl_vec<KeyParameter>& inParams,
                                            const HardwareAuthToken& authToken, begin_cb _hidl_cb) {
-    (void)authToken;
+    hidl_vec<KeyParameter> extendedParams = injectAuthToken(inParams, authToken);
     BeginOperationRequest request;
     request.purpose = legacy_enum_conversion(purpose);
     request.SetKeyMaterial(key.data(), key.size());
-    request.additional_params.Reinitialize(KmParamSet(inParams));
+    request.additional_params.Reinitialize(KmParamSet(extendedParams));
 
     BeginOperationResponse response;
     impl_->BeginOperation(request, &response);
@@ -496,16 +539,16 @@
                                             const HardwareAuthToken& authToken,
                                             const VerificationToken& verificationToken,
                                             update_cb _hidl_cb) {
-    (void)authToken;
     (void)verificationToken;
     UpdateOperationRequest request;
     UpdateOperationResponse response;
     hidl_vec<KeyParameter> resultParams;
     hidl_vec<uint8_t> resultBlob;
+    hidl_vec<KeyParameter> extendedParams = injectAuthToken(inParams, authToken);
     uint32_t resultConsumed = 0;
 
     request.op_handle = operationHandle;
-    request.additional_params.Reinitialize(KmParamSet(inParams));
+    request.additional_params.Reinitialize(KmParamSet(extendedParams));
 
     size_t inp_size = input.size();
     size_t ser_size = request.SerializedSize();
@@ -537,13 +580,13 @@
                                             const HardwareAuthToken& authToken,
                                             const VerificationToken& verificationToken,
                                             finish_cb _hidl_cb) {
-    (void)authToken;
     (void)verificationToken;
     FinishOperationRequest request;
+    hidl_vec<KeyParameter> extendedParams = injectAuthToken(inParams, authToken);
     request.op_handle = operationHandle;
     request.input.Reinitialize(input.data(), input.size());
     request.signature.Reinitialize(signature.data(), signature.size());
-    request.additional_params.Reinitialize(KmParamSet(inParams));
+    request.additional_params.Reinitialize(KmParamSet(extendedParams));
 
     FinishOperationResponse response;
     impl_->FinishOperation(request, &response);
diff --git a/trusty/keymaster/4.0/android.hardware.keymaster@4.0-service.trusty.xml b/trusty/keymaster/4.0/android.hardware.keymaster@4.0-service.trusty.xml
new file mode 100644
index 0000000..aa30707
--- /dev/null
+++ b/trusty/keymaster/4.0/android.hardware.keymaster@4.0-service.trusty.xml
@@ -0,0 +1,11 @@
+<manifest version="1.0" type="device">
+    <hal format="hidl">
+        <name>android.hardware.keymaster</name>
+        <transport>hwbinder</transport>
+        <version>4.0</version>
+        <interface>
+        <name>IKeymasterDevice</name>
+            <instance>default</instance>
+        </interface>
+    </hal>
+</manifest>
diff --git a/trusty/keymaster/Android.bp b/trusty/keymaster/Android.bp
index d107b78..f32a69e 100644
--- a/trusty/keymaster/Android.bp
+++ b/trusty/keymaster/Android.bp
@@ -101,7 +101,6 @@
         "libutils",
         "libhardware",
         "libhidlbase",
-        "libhidltransport",
         "libtrusty",
         "libkeymaster_messages",
         "libkeymaster3device",
@@ -132,10 +131,11 @@
         "libutils",
         "libhardware",
         "libhidlbase",
-        "libhidltransport",
         "libtrusty",
         "libkeymaster_messages",
         "libkeymaster4",
         "android.hardware.keymaster@4.0"
     ],
+
+    vintf_fragments: ["4.0/android.hardware.keymaster@4.0-service.trusty.xml"],
 }
diff --git a/trusty/storage/proxy/proxy.c b/trusty/storage/proxy/proxy.c
index c61f7d0..5f56408 100644
--- a/trusty/storage/proxy/proxy.c
+++ b/trusty/storage/proxy/proxy.c
@@ -46,6 +46,8 @@
         return MMC_RPMB;
     } else if (!strcmp(dev_type_name, "virt")) {
         return VIRT_RPMB;
+    } else if (!strcmp(dev_type_name, "sock")) {
+        return SOCK_RPMB;
     } else {
         return UNKNOWN_RPMB;
     }
diff --git a/trusty/storage/proxy/rpmb.c b/trusty/storage/proxy/rpmb.c
index 29827e2..0bd9e68 100644
--- a/trusty/storage/proxy/rpmb.c
+++ b/trusty/storage/proxy/rpmb.c
@@ -21,6 +21,8 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/un.h>
 #include <unistd.h>
 
 #include <linux/major.h>
@@ -192,7 +194,7 @@
             msg->result = STORAGE_ERR_GENERIC;
             goto err_response;
         }
-    } else if (dev_type == VIRT_RPMB) {
+    } else if ((dev_type == VIRT_RPMB) || (dev_type == SOCK_RPMB)) {
         size_t payload_size = req->reliable_write_size + req->write_size;
         rc = send_virt_rpmb_req(rpmb_fd, read_buf, req->read_size, req->payload, payload_size);
         if (rc < 0) {
@@ -234,12 +236,33 @@
     int rc;
     dev_type = open_dev_type;
 
-    rc = open(rpmb_devname, O_RDWR, 0);
-    if (rc < 0) {
-        ALOGE("unable (%d) to open rpmb device '%s': %s\n", errno, rpmb_devname, strerror(errno));
-        return rc;
+    if (dev_type != SOCK_RPMB) {
+        rc = open(rpmb_devname, O_RDWR, 0);
+        if (rc < 0) {
+            ALOGE("unable (%d) to open rpmb device '%s': %s\n", errno, rpmb_devname, strerror(errno));
+            return rc;
+        }
+        rpmb_fd = rc;
+    } else {
+        struct sockaddr_un unaddr;
+        struct sockaddr *addr = (struct sockaddr *)&unaddr;
+        rc = socket(AF_UNIX, SOCK_STREAM, 0);
+        if (rc < 0) {
+            ALOGE("unable (%d) to create socket: %s\n", errno, strerror(errno));
+            return rc;
+        }
+        rpmb_fd = rc;
+
+        memset(&unaddr, 0, sizeof(unaddr));
+        unaddr.sun_family = AF_UNIX;
+        // TODO if it overflowed, bail rather than connecting?
+        strncpy(unaddr.sun_path, rpmb_devname, sizeof(unaddr.sun_path)-1);
+        rc = connect(rpmb_fd, addr, sizeof(unaddr));
+        if (rc < 0) {
+            ALOGE("unable (%d) to connect to rpmb socket '%s': %s\n", errno, rpmb_devname, strerror(errno));
+            return rc;
+        }
     }
-    rpmb_fd = rc;
     return 0;
 }
 
diff --git a/trusty/storage/proxy/rpmb.h b/trusty/storage/proxy/rpmb.h
index 4c330c9..09af3c5 100644
--- a/trusty/storage/proxy/rpmb.h
+++ b/trusty/storage/proxy/rpmb.h
@@ -18,7 +18,7 @@
 #include <stdint.h>
 #include <trusty/interface/storage.h>
 
-enum dev_type { UNKNOWN_RPMB, MMC_RPMB, VIRT_RPMB };
+enum dev_type { UNKNOWN_RPMB, MMC_RPMB, VIRT_RPMB, SOCK_RPMB };
 
 int rpmb_open(const char* rpmb_devname, enum dev_type dev_type);
 int rpmb_send(struct storage_msg* msg, const void* r, size_t req_len);
diff --git a/libmeminfo/libdmabufinfo/tools/Android.bp b/trusty/utils/rpmb_dev/Android.bp
similarity index 74%
rename from libmeminfo/libdmabufinfo/tools/Android.bp
rename to trusty/utils/rpmb_dev/Android.bp
index 224b68e..e923e82 100644
--- a/libmeminfo/libdmabufinfo/tools/Android.bp
+++ b/trusty/utils/rpmb_dev/Android.bp
@@ -2,8 +2,7 @@
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
+// You may obtain a copy of the License at //
 //      http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
@@ -13,18 +12,22 @@
 // limitations under the License.
 
 cc_binary {
-    name: "dmabuf_dump",
+    name: "rpmb_dev",
+    vendor: true,
+
+    srcs: [
+        "rpmb_dev.c",
+    ],
+    shared_libs: [
+        "libc",
+        "liblog",
+        "libcrypto",
+    ],
     cflags: [
         "-Wall",
         "-Werror",
     ],
-
-    srcs: ["dmabuf_dump.cpp"],
-    shared_libs: [
-        "libbase",
+    init_rc: [
+        "rpmb_dev.rc",
     ],
-    static_libs: [
-        "libdmabufinfo",
-    ],
-    product_specific: true,
-}
\ No newline at end of file
+}
diff --git a/trusty/utils/rpmb_dev/rpmb.h b/trusty/utils/rpmb_dev/rpmb.h
new file mode 100644
index 0000000..ab7e8d8
--- /dev/null
+++ b/trusty/utils/rpmb_dev/rpmb.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __RPMB_H__
+#define __RPMB_H__
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+struct rpmb_key {
+    uint8_t byte[32];
+};
+
+struct rpmb_state;
+
+#define RPMB_BUF_SIZE 256
+
+/* provides */
+int rpmb_init(struct rpmb_state** statep,
+              void* mmc_handle,
+              const struct rpmb_key* key);
+void rpmb_uninit(struct rpmb_state* statep);
+int rpmb_read(struct rpmb_state* state,
+              void* buf,
+              uint16_t addr,
+              uint16_t count);
+/* count must be 1 or 2, addr must be aligned */
+int rpmb_write(struct rpmb_state* state,
+               const void* buf,
+               uint16_t addr,
+               uint16_t count,
+               bool sync);
+
+/* needs */
+int rpmb_send(void* mmc_handle,
+              void* reliable_write_buf,
+              size_t reliable_write_size,
+              void* write_buf,
+              size_t write_buf_size,
+              void* read_buf,
+              size_t read_buf_size,
+              bool sync);
+
+#endif
diff --git a/trusty/utils/rpmb_dev/rpmb_dev.c b/trusty/utils/rpmb_dev/rpmb_dev.c
new file mode 100644
index 0000000..af97eba
--- /dev/null
+++ b/trusty/utils/rpmb_dev/rpmb_dev.c
@@ -0,0 +1,657 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#define LOG_TAG "rpmb_mock"
+
+#include "rpmb_protocol.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <log/log.h>
+#include <openssl/hmac.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/un.h>
+#include <unistd.h>
+
+/* verbose is an int for getopt */
+static int verbose = false;
+
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+
+HMAC_CTX* HMAC_CTX_new(void) {
+    HMAC_CTX* ctx = malloc(sizeof(*ctx));
+    if (ctx != NULL) {
+        HMAC_CTX_init(ctx);
+    }
+    return ctx;
+}
+
+void HMAC_CTX_free(HMAC_CTX* ctx) {
+    if (ctx != NULL) {
+        HMAC_CTX_cleanup(ctx);
+        free(ctx);
+    }
+}
+
+#endif
+
+#define MAX_WRITE_COUNTER (0xffffffff)
+
+struct rpmb_data_header {
+    uint32_t write_counter;
+    uint16_t max_block;
+    uint8_t pad1;
+    uint8_t key_programmed;
+    struct rpmb_key key;
+    uint8_t pad[512 - 4 - 2 - 1 - 1 - sizeof(struct rpmb_key)];
+};
+
+#define MAX_PACKET_COUNT (8)
+
+struct rpmb_dev_state {
+    struct rpmb_data_header header;
+    struct rpmb_packet cmd[MAX_PACKET_COUNT];
+    struct rpmb_packet res[MAX_PACKET_COUNT];
+    uint16_t cmd_count;
+    uint16_t res_count;
+    int data_fd;
+};
+
+/* TODO: move to common location */
+static int rpmb_mac(struct rpmb_key key, struct rpmb_packet* packet, size_t packet_count,
+                    struct rpmb_key* mac) {
+    size_t i;
+    int hmac_ret;
+    unsigned int md_len;
+    HMAC_CTX* hmac_ctx;
+
+    hmac_ctx = HMAC_CTX_new();
+    hmac_ret = HMAC_Init_ex(hmac_ctx, &key, sizeof(key), EVP_sha256(), NULL);
+    if (!hmac_ret) {
+        ALOGE("HMAC_Init_ex failed\n");
+        goto err;
+    }
+    for (i = 0; i < packet_count; i++) {
+        hmac_ret = HMAC_Update(hmac_ctx, packet[i].data, 284);
+        if (!hmac_ret) {
+            ALOGE("HMAC_Update failed\n");
+            goto err;
+        }
+    }
+    hmac_ret = HMAC_Final(hmac_ctx, mac->byte, &md_len);
+    if (md_len != sizeof(mac->byte)) {
+        ALOGE("bad md_len %d != %zd\n", md_len, sizeof(mac->byte));
+        exit(1);
+    }
+    if (!hmac_ret) {
+        ALOGE("HMAC_Final failed\n");
+        goto err;
+    }
+
+err:
+    HMAC_CTX_free(hmac_ctx);
+    return hmac_ret ? 0 : -1;
+}
+
+static int rpmb_file_seek(struct rpmb_dev_state* s, uint16_t addr) {
+    int ret;
+    int pos = addr * RPMB_PACKET_DATA_SIZE + sizeof(s->header);
+    ret = lseek(s->data_fd, pos, SEEK_SET);
+    if (ret != pos) {
+        ALOGE("rpmb_dev: seek to %d failed, got %d\n", pos, ret);
+        return -1;
+    }
+    return 0;
+}
+
+static uint16_t rpmb_dev_program_key(struct rpmb_dev_state* s) {
+    int ret;
+
+    if (s->header.key_programmed) {
+        return RPMB_RES_WRITE_FAILURE;
+    }
+
+    s->header.key = s->cmd[0].key_mac;
+    s->header.key_programmed = 1;
+
+    ret = lseek(s->data_fd, 0, SEEK_SET);
+    if (ret) {
+        ALOGE("rpmb_dev: Failed to seek rpmb data file\n");
+        return RPMB_RES_WRITE_FAILURE;
+    }
+
+    ret = write(s->data_fd, &s->header, sizeof(s->header));
+    if (ret != sizeof(s->header)) {
+        ALOGE("rpmb_dev: Failed to write rpmb key: %d, %s\n", ret, strerror(errno));
+
+        return RPMB_RES_WRITE_FAILURE;
+    }
+
+    return RPMB_RES_OK;
+}
+
+static uint16_t rpmb_dev_get_counter(struct rpmb_dev_state* s) {
+    s->res[0].write_counter = rpmb_u32(s->header.write_counter);
+
+    return RPMB_RES_OK;
+}
+
+static uint16_t rpmb_dev_data_write(struct rpmb_dev_state* s) {
+    uint16_t addr = rpmb_get_u16(s->cmd[0].address);
+    uint16_t block_count = s->cmd_count;
+    uint32_t write_counter;
+    int ret;
+
+    if (s->header.write_counter == MAX_WRITE_COUNTER) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Write counter expired\n");
+        }
+        return RPMB_RES_WRITE_FAILURE;
+    }
+
+    write_counter = rpmb_get_u32(s->cmd[0].write_counter);
+    if (s->header.write_counter != write_counter) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Invalid write counter %u. Expected: %u\n", write_counter,
+                  s->header.write_counter);
+        }
+        return RPMB_RES_COUNT_FAILURE;
+    }
+
+    ret = rpmb_file_seek(s, addr);
+    if (ret) {
+        ALOGE("rpmb_dev: Failed to seek rpmb data file\n");
+        return RPMB_RES_WRITE_FAILURE;
+    }
+
+    for (int i = 0; i < block_count; i++) {
+        ret = write(s->data_fd, s->cmd[i].data, RPMB_PACKET_DATA_SIZE);
+        if (ret != RPMB_PACKET_DATA_SIZE) {
+            ALOGE("rpmb_dev: Failed to write rpmb data file: %d, %s\n", ret, strerror(errno));
+            return RPMB_RES_WRITE_FAILURE;
+        }
+    }
+
+    s->header.write_counter++;
+
+    ret = lseek(s->data_fd, 0, SEEK_SET);
+    if (ret) {
+        ALOGE("rpmb_dev: Failed to seek rpmb data file\n");
+        return RPMB_RES_WRITE_FAILURE;
+    }
+
+    ret = write(s->data_fd, &s->header.write_counter, sizeof(s->header.write_counter));
+    if (ret != sizeof(s->header.write_counter)) {
+        ALOGE("rpmb_dev: Failed to write rpmb write counter: %d, %s\n", ret, strerror(errno));
+
+        return RPMB_RES_WRITE_FAILURE;
+    }
+
+    s->res[0].write_counter = rpmb_u32(s->header.write_counter);
+    return RPMB_RES_OK;
+}
+
+static uint16_t rpmb_dev_data_read(struct rpmb_dev_state* s) {
+    uint16_t addr;
+    uint16_t block_count;
+    int ret;
+
+    addr = rpmb_get_u16(s->cmd[0].address);
+    block_count = s->res_count;
+
+    rpmb_file_seek(s, addr);
+
+    for (int i = 0; i < block_count; i++) {
+        ret = read(s->data_fd, s->res[i].data, RPMB_PACKET_DATA_SIZE);
+        if (ret != 0 && ret != RPMB_PACKET_DATA_SIZE) {
+            ALOGE("rpmb_dev: Failed to read rpmb data file: %d, %s\n", ret, strerror(errno));
+            return RPMB_RES_READ_FAILURE;
+        }
+    }
+
+    return RPMB_RES_OK;
+}
+
+struct rpmb_dev_cmd {
+    uint16_t (*func)(struct rpmb_dev_state* s);
+    uint16_t resp;
+    bool key_mac_is_key;
+    bool check_mac;
+    bool check_result_read;
+    bool check_key_programmed;
+    bool check_addr;
+    bool multi_packet_cmd;
+    bool multi_packet_res;
+    bool res_mac;
+};
+
+static struct rpmb_dev_cmd rpmb_dev_cmd_table[] = {
+        [RPMB_REQ_PROGRAM_KEY] =
+                {
+                        .func = rpmb_dev_program_key,
+                        .resp = RPMB_RESP_PROGRAM_KEY,
+                        .key_mac_is_key = true,
+                        .check_result_read = true,
+                },
+        [RPMB_REQ_GET_COUNTER] =
+                {
+                        .func = rpmb_dev_get_counter,
+                        .resp = RPMB_RESP_GET_COUNTER,
+                        .check_key_programmed = true,
+                        .res_mac = true,
+                },
+        [RPMB_REQ_DATA_WRITE] =
+                {
+                        .func = rpmb_dev_data_write,
+                        .resp = RPMB_RESP_DATA_WRITE,
+                        .check_mac = true,
+                        .check_result_read = true,
+                        .check_key_programmed = true,
+                        .check_addr = true,
+                        .multi_packet_cmd = true,
+                        .res_mac = true,
+                },
+        [RPMB_REQ_DATA_READ] =
+                {
+                        .func = rpmb_dev_data_read,
+                        .resp = RPMB_RESP_DATA_READ,
+                        .check_addr = true,
+                        .multi_packet_res = true,
+                        .res_mac = true,
+                },
+};
+
+#define countof(arr) (sizeof(arr) / sizeof(arr[0]))
+
+static void rpmb_dev_process_cmd(struct rpmb_dev_state* s) {
+    assert(s->cmd_count > 0);
+    assert(s->res_count > 0);
+    uint16_t req_resp = rpmb_get_u16(s->cmd[0].req_resp);
+    uint16_t addr = rpmb_get_u16(s->cmd[0].address);
+    uint16_t sub_req;
+    uint16_t cmd_index = req_resp < countof(rpmb_dev_cmd_table) ? req_resp : 0;
+    struct rpmb_dev_cmd* cmd = &rpmb_dev_cmd_table[cmd_index];
+    uint16_t result = RPMB_RES_GENERAL_FAILURE;
+    struct rpmb_key mac;
+    uint16_t block_count = 0;
+
+    if (cmd->check_result_read) {
+        sub_req = rpmb_get_u16(s->cmd[s->cmd_count - 1].req_resp);
+        if (sub_req != RPMB_REQ_RESULT_READ) {
+            if (verbose) {
+                ALOGE("rpmb_dev: Request %d, missing result read request, got %d, cmd_count %d\n",
+                      req_resp, sub_req, s->cmd_count);
+            }
+            goto err;
+        }
+        assert(s->cmd_count > 1);
+        s->cmd_count--;
+    }
+
+    if (cmd->check_mac) {
+        if (rpmb_mac(s->header.key, s->cmd, s->cmd_count, &mac) != 0) {
+            ALOGE("rpmb_dev: failed to caclulate mac\n");
+            goto err;
+        }
+    } else if (cmd->key_mac_is_key) {
+        mac = s->cmd[s->cmd_count - 1].key_mac;
+    } else {
+        memset(mac.byte, 0, sizeof(mac.byte));
+    }
+
+    if (memcmp(&mac, s->cmd[s->cmd_count - 1].key_mac.byte, sizeof(mac))) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Request %d, invalid MAC, cmd_count %d\n", req_resp, s->cmd_count);
+        }
+        if (cmd->check_mac) {
+            result = RPMB_RES_AUTH_FAILURE;
+        }
+        goto err;
+    }
+
+    if (cmd->multi_packet_cmd) {
+        block_count = s->cmd_count;
+    }
+    if (cmd->multi_packet_res) {
+        block_count = s->res_count;
+    }
+
+    if (cmd->check_addr && (addr + block_count > s->header.max_block + 1)) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Request %d, invalid addr: 0x%x count 0x%x, Out of bounds. Max addr "
+                  "0x%x\n",
+                  req_resp, addr, block_count, s->header.max_block + 1);
+        }
+        result = RPMB_RES_ADDR_FAILURE;
+        goto err;
+    }
+    if (!cmd->check_addr && addr) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Request %d, invalid addr: 0x%x != 0\n", req_resp, addr);
+        }
+        goto err;
+    }
+
+    for (int i = 1; i < s->cmd_count; i++) {
+        sub_req = rpmb_get_u16(s->cmd[i].req_resp);
+        if (sub_req != req_resp) {
+            if (verbose) {
+                ALOGE("rpmb_dev: Request %d, sub-request mismatch, %d, at %d\n", req_resp, i,
+                      sub_req);
+            }
+            goto err;
+        }
+    }
+    if (!cmd->multi_packet_cmd && s->cmd_count != 1) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Request %d, bad cmd count %d, expected 1\n", req_resp, s->cmd_count);
+        }
+        goto err;
+    }
+    if (!cmd->multi_packet_res && s->res_count != 1) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Request %d, bad res count %d, expected 1\n", req_resp, s->res_count);
+        }
+        goto err;
+    }
+
+    if (cmd->check_key_programmed && !s->header.key_programmed) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Request %d, key is not programmed\n", req_resp);
+        }
+        s->res[0].result = rpmb_u16(RPMB_RES_NO_AUTH_KEY);
+        return;
+    }
+
+    if (!cmd->func) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Unsupported request: %d\n", req_resp);
+        }
+        goto err;
+    }
+
+    result = cmd->func(s);
+
+err:
+    if (s->header.write_counter == MAX_WRITE_COUNTER) {
+        result |= RPMB_RES_WRITE_COUNTER_EXPIRED;
+    }
+
+    for (int i = 0; i < s->res_count; i++) {
+        s->res[i].nonce = s->cmd[0].nonce;
+        s->res[i].address = rpmb_u16(addr);
+        s->res[i].block_count = rpmb_u16(block_count);
+        s->res[i].result = rpmb_u16(result);
+        s->res[i].req_resp = rpmb_u16(cmd->resp);
+    }
+    if (cmd->res_mac) {
+        rpmb_mac(s->header.key, s->res, s->res_count, &s->res[s->res_count - 1].key_mac);
+    }
+}
+
+/*
+ * Receives data until one of the following is true:
+ * - The buffer is full (return will be len)
+ * - The connection closed (return > 0, < len)
+ * - An error occurred (return will be the negative error code from recv)
+ */
+ssize_t recv_until(int sock, void* dest_in, size_t len) {
+    size_t bytes_recvd = 0;
+    char* dest = dest_in;
+    while (bytes_recvd < len) {
+        ssize_t ret = recv(sock, dest, len - bytes_recvd, 0);
+        if (ret < 0) {
+            return ret;
+        }
+        dest += ret;
+        bytes_recvd += ret;
+        if (ret == 0) {
+            break;
+        }
+    }
+    return bytes_recvd;
+}
+
+/*
+ * Handles an incoming connection to the rpmb daemon.
+ * Returns 0 if the client disconnects without violating the protocol.
+ * Returns a negative value if we terminated the connection abnormally.
+ *
+ * Arguments:
+ *   conn_sock - an fd to send/recv on
+ *   s - an initialized rpmb device
+ */
+int handle_conn(struct rpmb_dev_state* s, int conn_sock) {
+    int ret;
+
+    while (true) {
+        memset(s->res, 0, sizeof(s->res));
+        ret = recv_until(conn_sock, &s->res_count, sizeof(s->res_count));
+
+        /*
+         * Disconnected while not in the middle of anything.
+         */
+        if (ret <= 0) {
+            return 0;
+        }
+
+        if (s->res_count > MAX_PACKET_COUNT) {
+            ALOGE("rpmb_dev: Receive count too large: %d\n", s->res_count);
+            return -1;
+        }
+        if (s->res_count <= 0) {
+            ALOGE("rpmb_dev: Receive count too small: %d\n", s->res_count);
+            return -1;
+        }
+
+        ret = recv_until(conn_sock, &s->cmd_count, sizeof(s->cmd_count));
+        if (ret != sizeof(s->cmd_count)) {
+            ALOGE("rpmb_dev: Failed to read cmd_count");
+            return -1;
+        }
+
+        if (s->cmd_count == 0) {
+            ALOGE("rpmb_dev: Must contain at least one command\n");
+            return -1;
+        }
+
+        if (s->cmd_count > MAX_PACKET_COUNT) {
+            ALOGE("rpmb_dev: Command count is too large\n");
+            return -1;
+        }
+
+        size_t cmd_size = s->cmd_count * sizeof(s->cmd[0]);
+        ret = recv_until(conn_sock, s->cmd, cmd_size);
+        if (ret != (int)cmd_size) {
+            ALOGE("rpmb_dev: Failed to read command: "
+                  "cmd_size: %zu ret: %d, %s\n",
+                  cmd_size, ret, strerror(errno));
+            return -1;
+        }
+
+        rpmb_dev_process_cmd(s);
+
+        size_t resp_size = sizeof(s->res[0]) * s->res_count;
+        ret = send(conn_sock, s->res, resp_size, 0);
+        if (ret != (int)resp_size) {
+            ALOGE("rpmb_dev: Failed to send response: %d, %s\n", ret, strerror(errno));
+            return -1;
+        }
+    }
+}
+
+void usage(const char* argv0) {
+    fprintf(stderr, "Usage: %s [-d|--dev] <datafile> [--sock] <socket_path>\n", argv0);
+    fprintf(stderr, "or:    %s [-d|--dev] <datafile> [--size <size>] [--key key]\n", argv0);
+}
+
+int main(int argc, char** argv) {
+    struct rpmb_dev_state s;
+    int ret;
+    int cmdres_sock;
+    struct sockaddr_un cmdres_sockaddr;
+    const char* data_file_name = NULL;
+    const char* socket_path = NULL;
+    int open_flags;
+    int init = false;
+
+    struct option long_options[] = {{"size", required_argument, 0, 0},
+                                    {"key", required_argument, 0, 0},
+                                    {"sock", required_argument, 0, 0},
+                                    {"dev", required_argument, 0, 'd'},
+                                    {"init", no_argument, &init, true},
+                                    {"verbose", no_argument, &verbose, true},
+                                    {0, 0, 0, 0}};
+
+    memset(&s.header, 0, sizeof(s.header));
+
+    while (1) {
+        int c;
+        int option_index = 0;
+        c = getopt_long(argc, argv, "d:", long_options, &option_index);
+        if (c == -1) {
+            break;
+        }
+
+        switch (c) {
+            /* long args */
+            case 0:
+                switch (option_index) {
+                    /* size */
+                    case 0:
+                        s.header.max_block = atoi(optarg) - 1;
+                        break;
+                    /* key */
+                    case 1:
+                        for (size_t i = 0; i < sizeof(s.header.key.byte); i++) {
+                            if (!optarg) {
+                                break;
+                            }
+                            s.header.key.byte[i] = strtol(optarg, &optarg, 16);
+                            s.header.key_programmed = 1;
+                        }
+                        break;
+                    /* sock */
+                    case 2:
+                        socket_path = optarg;
+                        break;
+                }
+                break;
+            /* dev */
+            case 'd':
+                data_file_name = optarg;
+                break;
+            default:
+                usage(argv[0]);
+                return EXIT_FAILURE;
+        }
+    }
+
+    /*
+     * We always need a data file, and at exactly one of --init or --sock
+     * must be specified.
+     */
+    if (!data_file_name || (!init == !socket_path)) {
+        usage(argv[0]);
+        return EXIT_FAILURE;
+    }
+
+    /*
+     * If the file is already initialized, exit early.
+     */
+    if (init && !access(data_file_name, F_OK)) {
+        return EXIT_SUCCESS;
+    }
+
+    open_flags = O_RDWR;
+    if (init) {
+        open_flags |= O_CREAT | O_TRUNC;
+    }
+    s.data_fd = open(data_file_name, open_flags, S_IWUSR | S_IRUSR);
+    if (s.data_fd < 0) {
+        ALOGE("rpmb_dev: Failed to open rpmb data file, %s: %s\n", data_file_name, strerror(errno));
+        return EXIT_FAILURE;
+    }
+
+    if (init) {
+        /* Create new rpmb data file */
+        if (s.header.max_block == 0) {
+            s.header.max_block = 512 - 1;
+        }
+        ret = write(s.data_fd, &s.header, sizeof(s.header));
+        if (ret != sizeof(s.header)) {
+            ALOGE("rpmb_dev: Failed to write rpmb data file: %d, %s\n", ret, strerror(errno));
+            return EXIT_FAILURE;
+        }
+        return EXIT_SUCCESS;
+    }
+
+    ret = read(s.data_fd, &s.header, sizeof(s.header));
+    if (ret != sizeof(s.header)) {
+        ALOGE("rpmb_dev: Failed to read rpmb data file: %d, %s\n", ret, strerror(errno));
+        return EXIT_FAILURE;
+    }
+
+    cmdres_sock = socket(AF_UNIX, SOCK_STREAM, 0);
+    if (cmdres_sock < 0) {
+        ALOGE("rpmb_dev: Failed to create command/response socket: %s\n", strerror(errno));
+        return EXIT_FAILURE;
+    }
+
+    cmdres_sockaddr.sun_family = AF_UNIX;
+    strncpy(cmdres_sockaddr.sun_path, socket_path, sizeof(cmdres_sockaddr.sun_path));
+
+    ret = bind(cmdres_sock, (struct sockaddr*)&cmdres_sockaddr, sizeof(struct sockaddr_un));
+    if (ret < 0) {
+        ALOGE("rpmb_dev: Failed to bind command/response socket: %s: %s\n", socket_path,
+              strerror(errno));
+        return EXIT_FAILURE;
+    }
+
+    ret = listen(cmdres_sock, 1);
+    if (ret < 0) {
+        ALOGE("rpmb_dev: Failed to listen on command/response socket: %s\n", strerror(errno));
+        return EXIT_FAILURE;
+    }
+
+    while (true) {
+        int conn_sock = accept(cmdres_sock, NULL, NULL);
+        if (conn_sock < 0) {
+            ALOGE("rpmb_dev: Could not accept connection: %s\n", strerror(errno));
+            return EXIT_FAILURE;
+        }
+        ret = handle_conn(&s, conn_sock);
+        close(conn_sock);
+        if (ret) {
+            ALOGE("rpmb_dev: Connection terminated: %d", ret);
+        }
+    }
+}
diff --git a/trusty/utils/rpmb_dev/rpmb_dev.rc b/trusty/utils/rpmb_dev/rpmb_dev.rc
new file mode 100644
index 0000000..9f60e81
--- /dev/null
+++ b/trusty/utils/rpmb_dev/rpmb_dev.rc
@@ -0,0 +1,29 @@
+# RPMB Mock
+on post-fs-data
+    mkdir /data/vendor/ss
+    chown root system /data/vendor/ss
+    chmod 0770 /data/vendor/ss
+    rm /data/vendor/ss/rpmb_sock
+    start rpmb_mock_init
+    start rpmb_mock
+
+    # Storage proxy
+    start storageproxyd
+
+service storageproxyd /vendor/bin/storageproxyd -d /dev/trusty-ipc-dev0 \
+        -r /data/vendor/ss/rpmb_sock -p /data/vendor/ss -t sock
+    class main
+    disabled
+    user root
+
+service rpmb_mock_init /vendor/bin/rpmb_dev --dev /data/vendor/ss/RPMB_DATA --init --key "ea df 64 44 ea 65 5d 1c 87 27 d4 20 71 0d 53 42 dd 73 a3 38 63 e1 d7 94 c3 72 a6 ea e0 64 64 e6" --size 2048
+    disabled
+    user system
+    group system
+    oneshot
+
+service rpmb_mock /vendor/bin/rpmb_dev --dev /data/vendor/ss/RPMB_DATA --sock /data/vendor/ss/rpmb_sock
+    class main
+    disabled
+    user system
+    group system
diff --git a/trusty/utils/rpmb_dev/rpmb_protocol.h b/trusty/utils/rpmb_dev/rpmb_protocol.h
new file mode 100644
index 0000000..bfcb806
--- /dev/null
+++ b/trusty/utils/rpmb_dev/rpmb_protocol.h
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+#include "rpmb.h" /* For struct rpmb_key */
+
+#define MMC_READ_MULTIPLE_BLOCK 18
+#define MMC_WRITE_MULTIPLE_BLOCK 25
+#define MMC_RELIABLE_WRITE_FLAG (1 << 31)
+
+#define MMC_RSP_PRESENT (1 << 0)
+#define MMC_RSP_CRC (1 << 2)
+#define MMC_RSP_OPCODE (1 << 4)
+#define MMC_CMD_ADTC (1 << 5)
+#define MMC_RSP_SPI_S1 (1 << 7)
+#define MMC_RSP_R1 (MMC_RSP_PRESENT | MMC_RSP_CRC | MMC_RSP_OPCODE)
+#define MMC_RSP_SPI_R1 (MMC_RSP_SPI_S1)
+
+struct rpmb_nonce {
+    uint8_t byte[16];
+};
+
+struct rpmb_u16 {
+    uint8_t byte[2];
+};
+
+struct rpmb_u32 {
+    uint8_t byte[4];
+};
+
+#define RPMB_PACKET_DATA_SIZE (256)
+
+struct rpmb_packet {
+    uint8_t pad[196];
+    struct rpmb_key key_mac;
+    uint8_t data[RPMB_PACKET_DATA_SIZE];
+    struct rpmb_nonce nonce;
+    struct rpmb_u32 write_counter;
+    struct rpmb_u16 address;
+    struct rpmb_u16 block_count;
+    struct rpmb_u16 result;
+    struct rpmb_u16 req_resp;
+};
+
+enum rpmb_request {
+    RPMB_REQ_PROGRAM_KEY = 0x0001,
+    RPMB_REQ_GET_COUNTER = 0x0002,
+    RPMB_REQ_DATA_WRITE = 0x0003,
+    RPMB_REQ_DATA_READ = 0x0004,
+    RPMB_REQ_RESULT_READ = 0x0005,
+};
+
+enum rpmb_response {
+    RPMB_RESP_PROGRAM_KEY = 0x0100,
+    RPMB_RESP_GET_COUNTER = 0x0200,
+    RPMB_RESP_DATA_WRITE = 0x0300,
+    RPMB_RESP_DATA_READ = 0x0400,
+};
+
+enum rpmb_result {
+    RPMB_RES_OK = 0x0000,
+    RPMB_RES_GENERAL_FAILURE = 0x0001,
+    RPMB_RES_AUTH_FAILURE = 0x0002,
+    RPMB_RES_COUNT_FAILURE = 0x0003,
+    RPMB_RES_ADDR_FAILURE = 0x0004,
+    RPMB_RES_WRITE_FAILURE = 0x0005,
+    RPMB_RES_READ_FAILURE = 0x0006,
+    RPMB_RES_NO_AUTH_KEY = 0x0007,
+
+    RPMB_RES_WRITE_COUNTER_EXPIRED = 0x0080,
+};
+
+static inline struct rpmb_u16 rpmb_u16(uint16_t val) {
+    struct rpmb_u16 ret = {{
+            (uint8_t)(val >> 8),
+            (uint8_t)(val >> 0),
+    }};
+    return ret;
+}
+
+static inline struct rpmb_u32 rpmb_u32(uint32_t val) {
+    struct rpmb_u32 ret = {{
+            (uint8_t)(val >> 24),
+            (uint8_t)(val >> 16),
+            (uint8_t)(val >> 8),
+            (uint8_t)(val >> 0),
+    }};
+    return ret;
+}
+
+static inline uint16_t rpmb_get_u16(struct rpmb_u16 u16) {
+    size_t i;
+    uint16_t val;
+
+    val = 0;
+    for (i = 0; i < sizeof(u16.byte); i++)
+        val = val << 8 | u16.byte[i];
+
+    return val;
+}
+
+static inline uint32_t rpmb_get_u32(struct rpmb_u32 u32) {
+    size_t i;
+    uint32_t val;
+
+    val = 0;
+    for (i = 0; i < sizeof(u32.byte); i++)
+        val = val << 8 | u32.byte[i];
+
+    return val;
+}
diff --git a/trusty/utils/trusty-ut-ctrl/Android.bp b/trusty/utils/trusty-ut-ctrl/Android.bp
index 77d1f70..9c8af7b 100644
--- a/trusty/utils/trusty-ut-ctrl/Android.bp
+++ b/trusty/utils/trusty-ut-ctrl/Android.bp
@@ -20,6 +20,8 @@
     shared_libs: [
         "libc",
         "liblog",
+    ],
+    static_libs: [
         "libtrusty",
     ],
     gtest: false,
diff --git a/usbd/Android.bp b/usbd/Android.bp
index 3afa7a9..6a339a1 100644
--- a/usbd/Android.bp
+++ b/usbd/Android.bp
@@ -5,7 +5,6 @@
     shared_libs: [
         "libbase",
         "libhidlbase",
-        "libhidltransport",
         "liblog",
         "libutils",
         "libhardware",