diff --git a/.clang-format-4 b/.clang-format-4
index ae4a451..9127163 100644
--- a/.clang-format-4
+++ b/.clang-format-4
@@ -5,6 +5,7 @@
 CommentPragmas: NOLINT:.*
 DerivePointerAlignment: false
 IndentWidth: 4
+ContinuationIndentWidth: 8
 PointerAlignment: Left
 TabWidth: 4
 UseTab: Never
diff --git a/CleanSpec.mk b/CleanSpec.mk
index e6f8716..0e43dae 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -77,3 +77,4 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/etc/ld.config.txt)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/etc/llndk.libraries.txt)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/etc/vndksp.libraries.txt)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/recovery/root/)
diff --git a/adb/Android.bp b/adb/Android.bp
index 0858a6c..53bf7e3 100644
--- a/adb/Android.bp
+++ b/adb/Android.bp
@@ -12,6 +12,367 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+cc_defaults {
+    name: "adb_defaults",
+
+    cflags: [
+        "-Wall",
+        "-Wextra",
+        "-Werror",
+        "-Wno-unused-parameter",
+        "-Wno-missing-field-initializers",
+        "-Wvla",
+    ],
+    rtti: true,
+
+    clang_cflags: [
+        "-Wexit-time-destructors",
+        "-Wthread-safety",
+    ],
+
+    use_version_lib: true,
+
+    compile_multilib: "first",
+    product_variables: {
+        debuggable: {
+            cflags: [
+                "-DALLOW_ADBD_ROOT",
+                "-DALLOW_ADBD_DISABLE_VERITY",
+                "-DALLOW_ADBD_NO_AUTH",
+            ],
+        },
+    },
+
+    target: {
+        android: {
+            cflags: ["-DADB_HOST=0"],
+        },
+
+        host: {
+            cflags: ["-DADB_HOST=1"],
+        },
+
+        darwin: {
+            host_ldlibs: [
+                "-lpthread",
+                "-framework CoreFoundation",
+                "-framework IOKit",
+                "-lobjc",
+            ],
+        },
+
+        windows: {
+            cflags: [
+                // Define windows.h and tchar.h Unicode preprocessor symbols so that
+                // CreateFile(), _tfopen(), etc. map to versions that take wchar_t*, breaking the
+                // build if you accidentally pass char*. Fix by calling like:
+                //   std::wstring path_wide;
+                //   if (!android::base::UTF8ToWide(path_utf8, &path_wide)) { /* error handling */ }
+                //   CreateFileW(path_wide.c_str());
+                "-DUNICODE=1",
+                "-D_UNICODE=1",
+
+                // -std=gnu++11 doesn't set _GNU_SOURCE on Windows.
+                "-D_GNU_SOURCE",
+
+                // MinGW hides some things behind _POSIX_SOURCE.
+                "-D_POSIX_SOURCE",
+            ],
+
+            host_ldlibs: [
+                "-lws2_32",
+                "-lgdi32",
+                "-luserenv",
+            ],
+        },
+    },
+}
+
+// libadb
+// =========================================================
+// These files are compiled for both the host and the device.
+libadb_srcs = [
+    "adb.cpp",
+    "adb_io.cpp",
+    "adb_listeners.cpp",
+    "adb_trace.cpp",
+    "adb_unique_fd.cpp",
+    "adb_utils.cpp",
+    "fdevent.cpp",
+    "services.cpp",
+    "sockets.cpp",
+    "socket_spec.cpp",
+    "sysdeps/errno.cpp",
+    "transport.cpp",
+    "transport_local.cpp",
+    "transport_usb.cpp",
+]
+
+libadb_posix_srcs = [
+    "sysdeps_unix.cpp",
+    "sysdeps/posix/network.cpp",
+]
+
+libadb_test_srcs = [
+    "adb_io_test.cpp",
+    "adb_listeners_test.cpp",
+    "adb_utils_test.cpp",
+    "fdevent_test.cpp",
+    "socket_spec_test.cpp",
+    "socket_test.cpp",
+    "sysdeps_test.cpp",
+    "sysdeps/stat_test.cpp",
+    "transport_test.cpp",
+    "types_test.cpp",
+]
+
+cc_library_host_static {
+    name: "libadb_host",
+    defaults: ["adb_defaults"],
+
+    srcs: libadb_srcs + [
+        "client/auth.cpp",
+        "client/usb_libusb.cpp",
+        "client/usb_dispatch.cpp",
+        "client/transport_mdns.cpp",
+    ],
+
+    target: {
+        linux: {
+            srcs: ["client/usb_linux.cpp"],
+        },
+        darwin: {
+            srcs: ["client/usb_osx.cpp"],
+        },
+
+        not_windows: {
+            srcs: libadb_posix_srcs,
+        },
+        windows: {
+            enabled: true,
+            srcs: [
+                "client/usb_windows.cpp",
+                "sysdeps_win32.cpp",
+                "sysdeps/win32/errno.cpp",
+                "sysdeps/win32/stat.cpp",
+            ],
+            shared_libs: ["AdbWinApi"],
+        },
+    },
+
+    static_libs: [
+        "libbase",
+        "libcrypto_utils",
+        "libcrypto",
+        "libdiagnose_usb",
+        "libmdnssd",
+        "libusb",
+    ],
+}
+
+cc_test_host {
+    name: "adb_test",
+    defaults: ["adb_defaults"],
+    srcs: libadb_test_srcs,
+    static_libs: [
+        "libadb_host",
+        "libbase",
+        "libcutils",
+        "libcrypto_utils",
+        "libcrypto",
+        "libmdnssd",
+        "libdiagnose_usb",
+        "libusb",
+    ],
+
+    target: {
+        windows: {
+            enabled: true,
+            shared_libs: ["AdbWinApi"],
+        },
+    },
+}
+
+cc_benchmark {
+    name: "adb_benchmark",
+    defaults: ["adb_defaults"],
+
+    srcs: ["transport_benchmark.cpp"],
+    target: {
+        android: {
+            static_libs: [
+                "libadbd",
+            ],
+        },
+        host: {
+            static_libs: [
+                "libadb_host",
+            ],
+        },
+    },
+
+    static_libs: [
+        "libbase",
+        "libcutils",
+        "libcrypto_utils",
+        "libcrypto",
+        "libdiagnose_usb",
+        "liblog",
+        "libusb",
+    ],
+}
+
+cc_binary_host {
+    name: "adb",
+
+    defaults: ["adb_defaults"],
+
+    srcs: [
+        "client/adb_client.cpp",
+        "client/bugreport.cpp",
+        "client/commandline.cpp",
+        "client/file_sync_client.cpp",
+        "client/main.cpp",
+        "client/console.cpp",
+        "client/line_printer.cpp",
+        "shell_service_protocol.cpp",
+    ],
+
+    static_libs: [
+        "libadb_host",
+        "libbase",
+        "libcutils",
+        "libcrypto_utils",
+        "libcrypto",
+        "libdiagnose_usb",
+        "liblog",
+        "libmdnssd",
+        "libusb",
+    ],
+
+    stl: "libc++_static",
+
+    // Don't add anything here, we don't want additional shared dependencies
+    // on the host adb tool, and shared libraries that link against libc++
+    // will violate ODR
+    shared_libs: [],
+
+    target: {
+        darwin: {
+            cflags: [
+                "-Wno-sizeof-pointer-memaccess",
+            ],
+        },
+        windows: {
+            enabled: true,
+            ldflags: ["-municode"],
+            shared_libs: ["AdbWinApi"],
+            required: [
+                "AdbWinUsbApi",
+            ],
+        },
+    },
+}
+
+cc_library_static {
+    name: "libadbd",
+    defaults: ["adb_defaults"],
+    recovery_available: true,
+
+    // libminadbd wants both, for some reason.
+    compile_multilib: "both",
+    srcs: libadb_srcs + libadb_posix_srcs + [
+        "daemon/auth.cpp",
+        "daemon/usb.cpp",
+        "daemon/jdwp_service.cpp",
+    ],
+
+    static_libs: [
+        "libasyncio",
+        "libbootloader_message",
+        "libcrypto_utils",
+        "libcrypto",
+        "libdiagnose_usb",
+        "libqemu_pipe",
+        "libbase",
+    ],
+}
+
+cc_binary {
+    name: "adbd",
+    defaults: ["adb_defaults"],
+
+    recovery_available: true,
+
+    srcs: [
+        "daemon/main.cpp",
+        "daemon/mdns.cpp",
+        "daemon/file_sync_service.cpp",
+        "daemon/framebuffer_service.cpp",
+        "daemon/remount_service.cpp",
+        "daemon/set_verity_enable_state_service.cpp",
+        "daemon/shell_service.cpp",
+        "shell_service_protocol.cpp",
+    ],
+
+    cflags: [
+        "-D_GNU_SOURCE",
+        "-Wno-deprecated-declarations",
+    ],
+
+    strip: {
+        keep_symbols: true,
+    },
+
+    static_libs: [
+        "libadbd",
+        "libasyncio",
+        "libavb_user",
+        "libbootloader_message",
+        "libcrypto_utils",
+        "libcrypto",
+        "libdiagnose_usb",
+        "libfec",
+        "libfec_rs",
+        "libfs_mgr",
+        "liblog",
+        "libext4_utils",
+        "libmdnssd",
+        "libminijail",
+        "libselinux",
+        "libsquashfs_utils",
+        "libqemu_pipe",
+
+        "libbase",
+        "libcutils",
+    ],
+}
+
+cc_test {
+    name: "adbd_test",
+    defaults: ["adb_defaults"],
+    srcs: libadb_test_srcs + [
+        "daemon/shell_service.cpp",
+        "daemon/shell_service_test.cpp",
+        "shell_service_protocol.cpp",
+        "shell_service_protocol_test.cpp",
+    ],
+
+    static_libs: [
+        "libadbd",
+        "libbase",
+        "libcutils",
+        "libcrypto_utils",
+        "libcrypto",
+        "libdiagnose_usb",
+        "liblog",
+        "libusb",
+        "libmdnssd",
+        "libselinux",
+    ],
+    test_suites: ["device-tests"],
+}
+
 python_binary_host {
     name: "adb_integration_test_adb",
     main: "test_adb.py",
diff --git a/adb/Android.mk b/adb/Android.mk
index c473ed2..8b2d558 100644
--- a/adb/Android.mk
+++ b/adb/Android.mk
@@ -1,388 +1,8 @@
-# Copyright 2005 The Android Open Source Project
-#
-# Android.mk for adb
-#
+LOCAL_PATH := $(call my-dir)
 
-LOCAL_PATH:= $(call my-dir)
+# Archive adb, adb.exe.
+$(call dist-for-goals,dist_files sdk win_sdk,$(HOST_OUT_EXECUTABLES)/adb)
 
-include $(LOCAL_PATH)/../platform_tools_tool_version.mk
-
-adb_host_sanitize :=
-adb_target_sanitize :=
-
-ADB_COMMON_CFLAGS := \
-    -frtti \
-    -Wall -Wextra -Werror \
-    -Wno-unused-parameter \
-    -Wno-missing-field-initializers \
-    -Wvla \
-    -DADB_VERSION="\"$(tool_version)\"" \
-
-ADB_COMMON_posix_CFLAGS := \
-    -Wexit-time-destructors \
-    -Wthread-safety \
-
-ADB_COMMON_linux_CFLAGS := \
-    $(ADB_COMMON_posix_CFLAGS) \
-
-ADB_COMMON_darwin_CFLAGS := \
-    $(ADB_COMMON_posix_CFLAGS) \
-
-# Define windows.h and tchar.h Unicode preprocessor symbols so that
-# CreateFile(), _tfopen(), etc. map to versions that take wchar_t*, breaking the
-# build if you accidentally pass char*. Fix by calling like:
-#   std::wstring path_wide;
-#   if (!android::base::UTF8ToWide(path_utf8, &path_wide)) { /* error handling */ }
-#   CreateFileW(path_wide.c_str());
-ADB_COMMON_windows_CFLAGS := \
-    -DUNICODE=1 -D_UNICODE=1 \
-    -D_POSIX_SOURCE
-
-# libadb
-# =========================================================
-
-# Much of adb is duplicated in bootable/recovery/minadb and fastboot. Changes
-# made to adb rarely get ported to the other two, so the trees have diverged a
-# bit. We'd like to stop this because it is a maintenance nightmare, but the
-# divergence makes this difficult to do all at once. For now, we will start
-# small by moving common files into a static library. Hopefully some day we can
-# get enough of adb in here that we no longer need minadb. https://b/17626262
-LIBADB_SRC_FILES := \
-    adb.cpp \
-    adb_io.cpp \
-    adb_listeners.cpp \
-    adb_trace.cpp \
-    adb_utils.cpp \
-    fdevent.cpp \
-    sockets.cpp \
-    socket_spec.cpp \
-    sysdeps/errno.cpp \
-    transport.cpp \
-    transport_local.cpp \
-    transport_usb.cpp \
-
-LIBADB_TEST_SRCS := \
-    adb_io_test.cpp \
-    adb_listeners_test.cpp \
-    adb_utils_test.cpp \
-    fdevent_test.cpp \
-    socket_spec_test.cpp \
-    socket_test.cpp \
-    sysdeps_test.cpp \
-    sysdeps/stat_test.cpp \
-    transport_test.cpp \
-
-LIBADB_CFLAGS := \
-    $(ADB_COMMON_CFLAGS) \
-    -fvisibility=hidden \
-
-LIBADB_linux_CFLAGS := \
-    $(ADB_COMMON_linux_CFLAGS) \
-
-LIBADB_darwin_CFLAGS := \
-    $(ADB_COMMON_darwin_CFLAGS) \
-
-LIBADB_windows_CFLAGS := \
-    $(ADB_COMMON_windows_CFLAGS) \
-
-LIBADB_darwin_SRC_FILES := \
-    sysdeps_unix.cpp \
-    sysdeps/posix/network.cpp \
-    client/usb_dispatch.cpp \
-    client/usb_libusb.cpp \
-    client/usb_osx.cpp \
-
-LIBADB_linux_SRC_FILES := \
-    sysdeps_unix.cpp \
-    sysdeps/posix/network.cpp \
-    client/usb_dispatch.cpp \
-    client/usb_libusb.cpp \
-    client/usb_linux.cpp \
-
-LIBADB_windows_SRC_FILES := \
-    sysdeps_win32.cpp \
-    sysdeps/win32/errno.cpp \
-    sysdeps/win32/stat.cpp \
-    client/usb_dispatch.cpp \
-    client/usb_libusb.cpp \
-    client/usb_windows.cpp \
-
-LIBADB_TEST_windows_SRCS := \
-    sysdeps/win32/errno_test.cpp \
-    sysdeps_win32_test.cpp \
-
-include $(CLEAR_VARS)
-LOCAL_MODULE := libadbd_usb
-LOCAL_CFLAGS := $(LIBADB_CFLAGS) -DADB_HOST=0
-LOCAL_SRC_FILES := daemon/usb.cpp
-
-LOCAL_SANITIZE := $(adb_target_sanitize)
-
-# Even though we're building a static library (and thus there's no link step for
-# this to take effect), this adds the includes to our path.
-LOCAL_STATIC_LIBRARIES := libcrypto_utils libcrypto libbase libasyncio
-
-include $(BUILD_STATIC_LIBRARY)
-
-include $(CLEAR_VARS)
-LOCAL_MODULE := libadbd
-LOCAL_CFLAGS := $(LIBADB_CFLAGS) -DADB_HOST=0
-LOCAL_SRC_FILES := \
-    $(LIBADB_SRC_FILES) \
-    adbd_auth.cpp \
-    jdwp_service.cpp \
-    sysdeps/posix/network.cpp \
-
-LOCAL_SANITIZE := $(adb_target_sanitize)
-
-# Even though we're building a static library (and thus there's no link step for
-# this to take effect), this adds the includes to our path.
-LOCAL_STATIC_LIBRARIES := libcrypto_utils libcrypto libqemu_pipe libbase
-
-LOCAL_WHOLE_STATIC_LIBRARIES := libadbd_usb
-
-include $(BUILD_STATIC_LIBRARY)
-
-include $(CLEAR_VARS)
-LOCAL_MODULE := libadb
-LOCAL_MODULE_HOST_OS := darwin linux windows
-LOCAL_CFLAGS := $(LIBADB_CFLAGS) -DADB_HOST=1
-LOCAL_CFLAGS_windows := $(LIBADB_windows_CFLAGS)
-LOCAL_CFLAGS_linux := $(LIBADB_linux_CFLAGS)
-LOCAL_CFLAGS_darwin := $(LIBADB_darwin_CFLAGS)
-LOCAL_SRC_FILES := \
-    $(LIBADB_SRC_FILES) \
-    adb_auth_host.cpp \
-    transport_mdns.cpp \
-
-LOCAL_SRC_FILES_darwin := $(LIBADB_darwin_SRC_FILES)
-LOCAL_SRC_FILES_linux := $(LIBADB_linux_SRC_FILES)
-LOCAL_SRC_FILES_windows := $(LIBADB_windows_SRC_FILES)
-
-LOCAL_SANITIZE := $(adb_host_sanitize)
-
-# Even though we're building a static library (and thus there's no link step for
-# this to take effect), this adds the includes to our path.
-LOCAL_STATIC_LIBRARIES := libcrypto_utils libcrypto libbase libmdnssd libusb
-
-LOCAL_C_INCLUDES_windows := development/host/windows/usb/api/
-LOCAL_MULTILIB := first
-
-include $(BUILD_HOST_STATIC_LIBRARY)
-
-include $(CLEAR_VARS)
-LOCAL_MODULE := adbd_test
-LOCAL_CFLAGS := -DADB_HOST=0 $(LIBADB_CFLAGS)
-LOCAL_SRC_FILES := \
-    $(LIBADB_TEST_SRCS) \
-    $(LIBADB_TEST_linux_SRCS) \
-    shell_service.cpp \
-    shell_service_protocol.cpp \
-    shell_service_protocol_test.cpp \
-    shell_service_test.cpp \
-
-LOCAL_SANITIZE := $(adb_target_sanitize)
-LOCAL_STATIC_LIBRARIES := libadbd libcrypto_utils libcrypto libusb libmdnssd
-LOCAL_SHARED_LIBRARIES := liblog libbase libcutils
-include $(BUILD_NATIVE_TEST)
-
-# libdiagnose_usb
-# =========================================================
-
-include $(CLEAR_VARS)
-LOCAL_MODULE := libdiagnose_usb
-LOCAL_MODULE_HOST_OS := darwin linux windows
-LOCAL_CFLAGS := $(LIBADB_CFLAGS)
-LOCAL_SRC_FILES := diagnose_usb.cpp
-# Even though we're building a static library (and thus there's no link step for
-# this to take effect), this adds the includes to our path.
-LOCAL_STATIC_LIBRARIES := libbase
-include $(BUILD_HOST_STATIC_LIBRARY)
-
-# adb_test
-# =========================================================
-
-include $(CLEAR_VARS)
-LOCAL_MODULE := adb_test
-LOCAL_MODULE_HOST_OS := darwin linux windows
-LOCAL_CFLAGS := -DADB_HOST=1 $(LIBADB_CFLAGS)
-LOCAL_CFLAGS_windows := $(LIBADB_windows_CFLAGS)
-LOCAL_CFLAGS_linux := $(LIBADB_linux_CFLAGS)
-LOCAL_CFLAGS_darwin := $(LIBADB_darwin_CFLAGS)
-LOCAL_SRC_FILES := \
-    $(LIBADB_TEST_SRCS) \
-    adb_client.cpp \
-    bugreport.cpp \
-    bugreport_test.cpp \
-    line_printer.cpp \
-    services.cpp \
-    shell_service_protocol.cpp \
-    shell_service_protocol_test.cpp \
-
-LOCAL_SRC_FILES_linux := $(LIBADB_TEST_linux_SRCS)
-LOCAL_SRC_FILES_darwin := $(LIBADB_TEST_darwin_SRCS)
-LOCAL_SRC_FILES_windows := $(LIBADB_TEST_windows_SRCS)
-LOCAL_SANITIZE := $(adb_host_sanitize)
-LOCAL_STATIC_LIBRARIES := \
-    libadb \
-    libbase \
-    libcrypto_utils \
-    libcrypto \
-    libcutils \
-    libdiagnose_usb \
-    libmdnssd \
-    libgmock_host \
-    libusb \
-
-# Set entrypoint to wmain from sysdeps_win32.cpp instead of main
-LOCAL_LDFLAGS_windows := -municode
-LOCAL_LDLIBS_linux := -lrt -ldl -lpthread
-LOCAL_LDLIBS_darwin := -framework CoreFoundation -framework IOKit -lobjc
-LOCAL_LDLIBS_windows := -lws2_32 -luserenv
-LOCAL_SHARED_LIBRARIES_windows := AdbWinApi
-
-LOCAL_MULTILIB := first
-
-include $(BUILD_HOST_NATIVE_TEST)
-
-# adb host tool
-# =========================================================
-include $(CLEAR_VARS)
-
-LOCAL_LDLIBS_linux := -lrt -ldl -lpthread
-
-LOCAL_LDLIBS_darwin := -lpthread -framework CoreFoundation -framework IOKit -framework Carbon -lobjc
-
-# Use wmain instead of main
-LOCAL_LDFLAGS_windows := -municode
-LOCAL_LDLIBS_windows := -lws2_32 -lgdi32
-LOCAL_SHARED_LIBRARIES_windows := AdbWinApi
-LOCAL_REQUIRED_MODULES_windows := AdbWinUsbApi
-
-LOCAL_SRC_FILES := \
-    adb_client.cpp \
-    bugreport.cpp \
-    client/main.cpp \
-    console.cpp \
-    commandline.cpp \
-    file_sync_client.cpp \
-    line_printer.cpp \
-    services.cpp \
-    shell_service_protocol.cpp \
-
-LOCAL_CFLAGS += \
-    $(ADB_COMMON_CFLAGS) \
-    -D_GNU_SOURCE \
-    -DADB_HOST=1 \
-
-LOCAL_CFLAGS_windows := \
-    $(ADB_COMMON_windows_CFLAGS)
-
-LOCAL_CFLAGS_linux := \
-    $(ADB_COMMON_linux_CFLAGS) \
-
-LOCAL_CFLAGS_darwin := \
-    $(ADB_COMMON_darwin_CFLAGS) \
-    -Wno-sizeof-pointer-memaccess -Wno-unused-parameter \
-
-LOCAL_MODULE := adb
-LOCAL_MODULE_TAGS := debug
-LOCAL_MODULE_HOST_OS := darwin linux windows
-
-LOCAL_SANITIZE := $(adb_host_sanitize)
-LOCAL_STATIC_LIBRARIES := \
-    libadb \
-    libbase \
-    libcrypto_utils \
-    libcrypto \
-    libdiagnose_usb \
-    liblog \
-    libmdnssd \
-    libusb \
-
-# Don't use libcutils on Windows.
-LOCAL_STATIC_LIBRARIES_darwin := libcutils
-LOCAL_STATIC_LIBRARIES_linux := libcutils
-
-LOCAL_CXX_STL := libc++_static
-
-# Don't add anything here, we don't want additional shared dependencies
-# on the host adb tool, and shared libraries that link against libc++
-# will violate ODR
-LOCAL_SHARED_LIBRARIES :=
-
-include $(BUILD_HOST_EXECUTABLE)
-
-$(call dist-for-goals,dist_files sdk win_sdk,$(LOCAL_BUILT_MODULE))
 ifdef HOST_CROSS_OS
-# Archive adb.exe for win_sdk build.
-$(call dist-for-goals,win_sdk,$(ALL_MODULES.host_cross_adb.BUILT))
+$(call dist-for-goals,dist_files sdk win_sdk,$(ALL_MODULES.host_cross_adb.BUILT))
 endif
-
-
-# adbd device daemon
-# =========================================================
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-    daemon/main.cpp \
-    daemon/mdns.cpp \
-    services.cpp \
-    file_sync_service.cpp \
-    framebuffer_service.cpp \
-    remount_service.cpp \
-    set_verity_enable_state_service.cpp \
-    shell_service.cpp \
-    shell_service_protocol.cpp \
-
-LOCAL_CFLAGS := \
-    $(ADB_COMMON_CFLAGS) \
-    $(ADB_COMMON_linux_CFLAGS) \
-    -DADB_HOST=0 \
-    -D_GNU_SOURCE \
-    -Wno-deprecated-declarations \
-
-LOCAL_CFLAGS += -DALLOW_ADBD_NO_AUTH=$(if $(filter userdebug eng,$(TARGET_BUILD_VARIANT)),1,0)
-
-ifneq (,$(filter userdebug eng,$(TARGET_BUILD_VARIANT)))
-LOCAL_CFLAGS += -DALLOW_ADBD_DISABLE_VERITY=1
-LOCAL_CFLAGS += -DALLOW_ADBD_ROOT=1
-endif
-
-LOCAL_MODULE := adbd
-
-LOCAL_FORCE_STATIC_EXECUTABLE := true
-
-LOCAL_SANITIZE := $(adb_target_sanitize)
-LOCAL_STRIP_MODULE := keep_symbols
-LOCAL_STATIC_LIBRARIES := \
-    libadbd \
-    libasyncio \
-    libavb_user \
-    libbase \
-    libqemu_pipe \
-    libbootloader_message \
-    libfs_mgr \
-    libfec \
-    libfec_rs \
-    libselinux \
-    liblog \
-    libext4_utils \
-    libsquashfs_utils \
-    libcutils \
-    libbase \
-    libcrypto_utils \
-    libcrypto \
-    libminijail \
-    libmdnssd \
-    libdebuggerd_handler \
-
-include $(BUILD_EXECUTABLE)
-
-# adb integration test
-# =========================================================
-$(call dist-for-goals,sdk,$(ALL_MODULES.adb_integration_test_adb.BUILT))
-$(call dist-for-goals,sdk,$(ALL_MODULES.adb_integration_test_device.BUILT))
-
-include $(call first-makefiles-under,$(LOCAL_PATH))
diff --git a/adb/CPPLINT.cfg b/adb/CPPLINT.cfg
deleted file mode 100644
index f496490..0000000
--- a/adb/CPPLINT.cfg
+++ /dev/null
@@ -1,2 +0,0 @@
-set noparent
-filter=-build/header_guard,-build/include,-readability/function,-whitespace/indent
diff --git a/adb/adb.bash b/adb/adb.bash
new file mode 100644
index 0000000..d36bec3
--- /dev/null
+++ b/adb/adb.bash
@@ -0,0 +1,499 @@
+# /* vim: set ai ts=4 ft=sh: */
+#
+# Copyright 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.
+#
+
+_adb() {
+    if ! type -t "$1" >/dev/null; then
+        return
+    fi
+
+    if type -t _init_completion >/dev/null; then
+        _init_completion || return
+    fi
+
+    local where i cur serial
+    COMPREPLY=()
+
+    serial="${ANDROID_SERIAL:-none}"
+    where=OPTIONS
+    for ((i=1; i <= COMP_CWORD; i++)); do
+        cur="${COMP_WORDS[i]}"
+        case "${cur}" in
+            -s)
+                where=OPT_SERIAL
+                ;;
+            -p)
+                where=OPT_PATH
+                ;;
+            -*)
+                where=OPTIONS
+                ;;
+            *)
+                if [[ $where == OPT_SERIAL ]]; then
+                    where=OPT_SERIAL_ARG
+                    serial=${cur}
+                else
+                    where=COMMAND
+                    break
+                fi
+                ;;
+        esac
+    done
+
+    if [[ $where == COMMAND && $i -ge $COMP_CWORD ]]; then
+        where=OPTIONS
+    fi
+
+    OPTIONS="-d -e -s -p"
+    COMMAND="devices connect disconnect push pull sync shell emu logcat lolcat forward jdwp install uninstall bugreport help version start-server kill-server get-state get-serialno status-window remount reboot reboot-bootloader root usb tcpip disable-verity"
+
+    case $where in
+        OPTIONS|OPT_SERIAL|OPT_PATH)
+            COMPREPLY=( $(compgen -W "$OPTIONS $COMMAND" -- "$cur") )
+            ;;
+        OPT_SERIAL_ARG)
+            local devices=$(command adb devices 2> /dev/null | grep -v "List of devices" | awk '{ print $1 }')
+            COMPREPLY=( $(compgen -W "${devices}" -- ${cur}) )
+            ;;
+        COMMAND)
+            if [[ $i -eq $COMP_CWORD ]]; then
+                COMPREPLY=( $(compgen -W "$COMMAND" -- "$cur") )
+            else
+                i=$((i+1))
+                case "${cur}" in
+                    install)
+                        _adb_cmd_install "$serial" $i
+                        ;;
+                    sideload)
+                        _adb_cmd_sideload "$serial" $i
+                        ;;
+                    pull)
+                        _adb_cmd_pull "$serial" $i
+                        ;;
+                    push)
+                        _adb_cmd_push "$serial" $i
+                        ;;
+                    reboot)
+                        if [[ $COMP_CWORD == $i ]]; then
+                            args="bootloader recovery"
+                            COMPREPLY=( $(compgen -W "${args}" -- "${COMP_WORDS[i]}") )
+                        fi
+                        ;;
+                    shell)
+                        _adb_cmd_shell "$serial" $i
+                        ;;
+                    uninstall)
+                        _adb_cmd_uninstall "$serial" $i
+                        ;;
+                esac
+            fi
+            ;;
+    esac
+
+    return 0
+}
+
+_adb_cmd_install() {
+    local serial i cur where
+
+    serial=$1
+    i=$2
+
+    where=OPTIONS
+    for ((; i <= COMP_CWORD; i++)); do
+        cur="${COMP_WORDS[i]}"
+        case "${cur}" in
+            -*)
+                where=OPTIONS
+                ;;
+            *)
+                where=FILE
+                break
+                ;;
+        esac
+    done
+
+    cur="${COMP_WORDS[COMP_CWORD]}"
+    if [[ $where == OPTIONS ]]; then
+        COMPREPLY=( $(compgen -W "-d -l -r -s" -- "${cur}") )
+        return
+    fi
+
+    _adb_util_complete_local_file "${cur}" '!*.apk'
+}
+
+_adb_cmd_sideload() {
+    local serial i cur
+
+    serial=$1
+    i=$2
+
+    cur="${COMP_WORDS[COMP_CWORD]}"
+
+    _adb_util_complete_local_file "${cur}" '!*.zip'
+}
+
+_adb_cmd_push() {
+    local serial IFS=$'\n' i cur
+
+    serial=$1
+    i=$2
+
+    cur="${COMP_WORDS[COMP_CWORD]}"
+
+    if [[ $COMP_CWORD == $i ]]; then
+        _adb_util_complete_local_file "${cur}"
+    elif [[ $COMP_CWORD == $(($i+1)) ]]; then
+        if [ "${cur}" == "" ]; then
+            cur="/"
+        fi
+        _adb_util_list_files $serial "${cur}"
+    fi
+}
+
+_adb_cmd_pull() {
+    local serial IFS=$'\n' i cur
+
+    serial=$1
+    i=$2
+
+    cur="${COMP_WORDS[COMP_CWORD]}"
+
+    if [[ $COMP_CWORD == $i ]]; then
+        if [ "${cur}" == "" ]; then
+            cur="/"
+        fi
+        _adb_util_list_files $serial "${cur}"
+    elif [[ $COMP_CWORD == $(($i+1)) ]]; then
+        _adb_util_complete_local_file "${cur}"
+    fi
+}
+
+_adb_cmd_shell() {
+    local serial IFS=$'\n' i cur
+    local -a args
+
+    serial=$1
+    i=$2
+
+    cur="${COMP_WORDS[i]}"
+    if [ "$serial" != "none" ]; then
+        args=(-s $serial)
+    fi
+
+    if [[ $i -eq $COMP_CWORD && ${cur:0:1} != "/" ]]; then
+        paths=$(command adb ${args[@]} shell echo '$'PATH 2> /dev/null | tr -d '\r' | tr : '\n')
+        COMMAND=$(command adb ${args[@]} shell ls $paths '2>' /dev/null | tr -d '\r' | {
+            while read -r tmp; do
+                command=${tmp##*/}
+                printf '%s\n' "$command"
+            done
+        })
+        COMPREPLY=( $(compgen -W "$COMMAND" -- "$cur") )
+        return 0
+    fi
+
+    i=$((i+1))
+    case "$cur" in
+        ls)
+            _adb_shell_file_command $serial $i "--color -A -C -F -H -L -R -S -Z -a -c -d -f -h -i -k -l -m -n -p -q -r -s -t -u -x -1"
+            ;;
+        cat)
+            _adb_shell_file_command $serial $i "-h -e -t -u -v"
+            ;;
+        dumpsys)
+            _adb_cmd_shell_dumpsys "$serial" $i
+            ;;
+        am)
+            _adb_cmd_shell_am "$serial" $i
+            ;;
+        pm)
+            _adb_cmd_shell_pm "$serial" $i
+            ;;
+        /*)
+            _adb_util_list_files $serial "$cur"
+            ;;
+        *)
+            COMPREPLY=( )
+            ;;
+    esac
+
+    return 0
+}
+
+_adb_cmd_shell_dumpsys() {
+    local serial i cur
+    local -a args
+    local candidates
+
+    unset IFS
+
+    serial=$1
+    i=$2
+
+    if [ "$serial" != "none" ]; then
+        args=(-s $serial)
+    fi
+
+    if (( $i == $COMP_CWORD )) ; then
+        cur="${COMP_WORDS[COMP_CWORD]}"
+        # First line is a header, so need "1d".
+        candidates=$(command adb ${args[@]} shell dumpsys -l 2> /dev/null | sed -e '1d;s/^  *//' | tr -d '\r')
+        candidates="-l $candidates"
+        COMPREPLY=( $(compgen -W "$candidates" -- "$cur") )
+        return 0
+    fi
+
+    COMPREPLY=( )
+    return 0
+}
+
+_adb_cmd_shell_am() {
+    local serial i cur
+    local candidates
+
+    unset IFS
+
+    serial=$1
+    i=$2
+
+    if (( $i == $COMP_CWORD )) ; then
+        cur="${COMP_WORDS[COMP_CWORD]}"
+        candidates="broadcast clear-debug-app clear-watch-heap dumpheap force-stop get-config get-inactive hang idle-maintenance instrument kill kill-all monitor package-importance profile restart screen-compat send-trim-memory set-debug-app set-inactive set-watch-heap stack start startservice start-user stopservice stop-user suppress-resize-config-changes switch-user task to-app-uri to-intent-uri to-uri"
+        COMPREPLY=( $(compgen -W "$candidates" -- "$cur") )
+        return 0
+    fi
+
+    COMPREPLY=( )
+    return 0
+}
+
+
+_adb_cmd_shell_pm() {
+    local serial i cur
+    local candidates
+
+    unset IFS
+
+    serial=$1
+    i=$2
+
+    if (( $i == $COMP_CWORD )) ; then
+        cur="${COMP_WORDS[COMP_CWORD]}"
+        candidates="-l -lf -p clear create-user default-state disable"
+        candidates+=" disable-until-used disable-user dump enable"
+        candidates+=" get-app-link get-install-location get-max-users"
+        candidates+=" get-max-running-users grant hide install"
+        candidates+=" install-abandon install-commit install-create"
+        candidates+=" install-write list move-package"
+        candidates+=" move-primary-storage path remove-user"
+        candidates+=" reset-permissions revoke set-app-link"
+        candidates+=" set-installer set-install-location"
+        candidates+=" set-permission-enforced trim-caches unhide"
+        candidates+=" uninstall"
+        COMPREPLY=( $(compgen -W "$candidates" -- "$cur") )
+        return 0
+    fi
+
+    if (( $i + 1 == $COMP_CWORD )) && [[ "${COMP_WORDS[COMP_CWORD -1]}" == "list" ]]  ; then
+        cur="${COMP_WORDS[COMP_CWORD]}"
+        candidates="packages permission-groups permissions instrumentation features libraries users"
+        COMPREPLY=( $(compgen -W "$candidates" -- "$cur") )
+        return 0
+    fi
+
+    COMPREPLY=( )
+    return 0
+}
+
+_adb_cmd_uninstall() {
+    local serial i where cur packages
+
+    serial=$1
+    i=$2
+    if [ "$serial" != "none" ]; then
+        args=(-s $serial)
+    fi
+
+    where=OPTIONS
+    for ((; i <= COMP_CWORD; i++)); do
+        cur="${COMP_WORDS[i]}"
+        case "${cur}" in
+            -*)
+                where=OPTIONS
+                ;;
+            *)
+                where=FILE
+                break
+                ;;
+        esac
+    done
+
+    cur="${COMP_WORDS[COMP_CWORD]}"
+    if [[ $where == OPTIONS ]]; then
+        COMPREPLY=( $(compgen -W "-k" -- "${cur}") )
+    fi
+
+    packages="$(
+        command adb ${args[@]} shell pm list packages '2>' /dev/null 2> /dev/null | tr -d '\r' | {
+            while read -r tmp; do
+                local package=${tmp#package:}
+                echo -n "${package} "
+            done
+        }
+    )"
+
+    COMPREPLY=( ${COMPREPLY[@]:-} $(compgen -W "${packages}" -- "${cur}") )
+}
+
+_adb_shell_file_command() {
+    local serial i cur file options
+    local -a args
+
+    serial=$1
+    i=$2
+    if [ "$serial" != "none" ]; then
+        args=(-s $serial)
+    fi
+    options=$3
+
+    where=OPTIONS
+    for ((; i <= COMP_CWORD; i++)); do
+        cur="${COMP_WORDS[i]}"
+        case "${cur}" in
+            -*)
+                where=OPTIONS
+                ;;
+            *)
+                where=FILE
+                break
+                ;;
+        esac
+    done
+
+    file="${COMP_WORDS[COMP_CWORD]}"
+    if [[ ${file} == "" ]]; then
+        file="/"
+    fi
+
+    case $where in
+        OPTIONS)
+            unset IFS
+            COMPREPLY=( $(compgen -W "$options" -- "$cur") )
+            ;;
+        FILE)
+            _adb_util_list_files $serial "$file"
+            ;;
+    esac
+
+    return 0
+}
+
+_adb_util_list_files() {
+    local serial dir IFS=$'\n'
+    local -a toks
+    local -a args
+
+    serial="$1"
+    file="$2"
+
+    if [ "$serial" != "none" ]; then
+        args=(-s $serial)
+    fi
+
+    if [[ $( command adb ${args[@]} shell ls -dF / '2>/dev/null' | tr -d '\r' ) == "d /" ]] ; then
+        toks=( ${toks[@]-} $(
+            command adb ${args[@]} shell ls -dF ${file}"*" '2>' /dev/null 2> /dev/null | tr -d '\r' | {
+                while read -r tmp; do
+                    filetype=${tmp%% *}
+                    filename=${tmp:${#filetype}+1}
+                    if [[ ${filetype:${#filetype}-1:1} == d ]]; then
+                        printf '%s/\n' "$filename"
+                    else
+                        printf '%s\n' "$filename"
+                    fi
+                done
+            }
+        ))
+    else
+        toks=( ${toks[@]-} $(
+            command adb ${args[@]} shell ls -dp ${file}"*" '2>/dev/null' 2> /dev/null | tr -d '\r'
+        ))
+    fi
+
+    # Since we're probably doing file completion here, don't add a space after.
+    if [[ $(type -t compopt) = "builtin" ]]; then
+        compopt -o nospace
+    fi
+
+    COMPREPLY=( ${COMPREPLY[@]:-} "${toks[@]}" )
+}
+
+_adb_util_complete_local_file()
+{
+    local file xspec i j IFS=$'\n'
+    local -a dirs files
+
+    file=$1
+    xspec=$2
+
+    # Since we're probably doing file completion here, don't add a space after.
+    if [[ $(type -t compopt) = "builtin" ]]; then
+        compopt -o plusdirs
+        if [[ "${xspec}" == "" ]]; then
+            COMPREPLY=( ${COMPREPLY[@]:-} $(compgen -f -- "${cur}") )
+        else
+            compopt +o filenames
+            COMPREPLY=( ${COMPREPLY[@]:-} $(compgen -f -X "${xspec}" -- "${cur}") )
+        fi
+    else
+        # Work-around for shells with no compopt
+
+        dirs=( $(compgen -d -- "${cur}" ) )
+
+        if [[ "${xspec}" == "" ]]; then
+            files=( ${COMPREPLY[@]:-} $(compgen -f -- "${cur}") )
+        else
+            files=( ${COMPREPLY[@]:-} $(compgen -f -X "${xspec}" -- "${cur}") )
+        fi
+
+        COMPREPLY=( $(
+            for i in "${files[@]}"; do
+                local skip=
+                for j in "${dirs[@]}"; do
+                    if [[ $i == $j ]]; then
+                        skip=1
+                        break
+                    fi
+                done
+                [[ -n $skip ]] || printf "%s\n" "$i"
+            done
+        ))
+
+        COMPREPLY=( ${COMPREPLY[@]:-} $(
+            for i in "${dirs[@]}"; do
+                printf "%s/\n" "$i"
+            done
+        ))
+    fi
+}
+
+
+if [[ $(type -t compopt) = "builtin" ]]; then
+    complete -F _adb adb
+else
+    complete -o nospace -F _adb adb
+fi
diff --git a/adb/adb.cpp b/adb/adb.cpp
index c791c7b..f8a54c6 100644
--- a/adb/adb.cpp
+++ b/adb/adb.cpp
@@ -44,6 +44,7 @@
 #include <android-base/parsenetaddress.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
+#include <build/version.h>
 
 #include "adb_auth.h"
 #include "adb_io.h"
@@ -66,8 +67,8 @@
         "Android Debug Bridge version %d.%d.%d\n"
         "Version %s\n"
         "Installed as %s\n",
-        ADB_VERSION_MAJOR, ADB_VERSION_MINOR, ADB_SERVER_VERSION, ADB_VERSION,
-        android::base::GetExecutablePath().c_str());
+        ADB_VERSION_MAJOR, ADB_VERSION_MINOR, ADB_SERVER_VERSION,
+        android::build::GetBuildNumber().c_str(), android::base::GetExecutablePath().c_str());
 }
 
 void fatal(const char *fmt, ...) {
@@ -131,12 +132,21 @@
 {
     D("adb: online");
     t->online = 1;
+    t->SetConnectionEstablished(true);
 }
 
 void handle_offline(atransport *t)
 {
-    D("adb: offline");
-    //Close the associated usb
+    if (t->GetConnectionState() == kCsOffline) {
+        LOG(INFO) << t->serial_name() << ": already offline";
+        return;
+    }
+
+    LOG(INFO) << t->serial_name() << ": offline";
+
+    t->SetConnectionState(kCsOffline);
+
+    // Close the associated usb
     t->online = 0;
 
     // This is necessary to avoid a race condition that occurred when a transport closes
@@ -248,7 +258,7 @@
                    << connection_str.length() << ")";
     }
 
-    cp->payload = std::move(connection_str);
+    cp->payload.assign(connection_str.begin(), connection_str.end());
     cp->msg.data_length = cp->payload.size();
 
     send_packet(cp, t);
@@ -317,13 +327,11 @@
 }
 
 static void handle_new_connection(atransport* t, apacket* p) {
-    if (t->GetConnectionState() != kCsOffline) {
-        t->SetConnectionState(kCsOffline);
-        handle_offline(t);
-    }
+    handle_offline(t);
 
     t->update_version(p->msg.arg0, p->msg.arg1);
-    parse_banner(p->payload, t);
+    std::string banner(p->payload.begin(), p->payload.end());
+    parse_banner(banner, t);
 
 #if ADB_HOST
     handle_online(t);
@@ -349,19 +357,6 @@
     CHECK_EQ(p->payload.size(), p->msg.data_length);
 
     switch(p->msg.command){
-    case A_SYNC:
-        if (p->msg.arg0){
-            send_packet(p, t);
-#if ADB_HOST
-            send_connect(t);
-#endif
-        } else {
-            t->SetConnectionState(kCsOffline);
-            handle_offline(t);
-            send_packet(p, t);
-        }
-        return;
-
     case A_CNXN:  // CONNECT(version, maxdata, "system-id-string")
         handle_new_connection(t, p);
         break;
@@ -370,14 +365,16 @@
         switch (p->msg.arg0) {
 #if ADB_HOST
             case ADB_AUTH_TOKEN:
-                if (t->GetConnectionState() == kCsOffline) {
-                    t->SetConnectionState(kCsUnauthorized);
+                if (t->GetConnectionState() != kCsAuthorizing) {
+                    t->SetConnectionState(kCsAuthorizing);
                 }
                 send_auth_response(p->payload.data(), p->msg.data_length, t);
                 break;
 #else
-            case ADB_AUTH_SIGNATURE:
-                if (adbd_auth_verify(t->token, sizeof(t->token), p->payload)) {
+            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)) {
                     adbd_auth_verified(t);
                     t->failed_auth_attempts = 0;
                 } else {
@@ -385,6 +382,7 @@
                     send_auth_request(t);
                 }
                 break;
+            }
 
             case ADB_AUTH_RSAPUBLICKEY:
                 adbd_auth_confirm_key(p->payload.data(), p->msg.data_length, t);
@@ -399,7 +397,9 @@
 
     case A_OPEN: /* OPEN(local-id, 0, "destination") */
         if (t->online && p->msg.arg0 != 0 && p->msg.arg1 == 0) {
-            asocket* s = create_local_service_socket(p->payload.c_str(), t);
+            // TODO: Switch to string_view.
+            std::string address(p->payload.begin(), p->payload.end());
+            asocket* s = create_local_service_socket(address.c_str(), t);
             if (s == nullptr) {
                 send_close(0, p->msg.arg0, t);
             } else {
@@ -885,9 +885,8 @@
     }
 #else /* !defined(_WIN32) */
     // set up a pipe so the child can tell us when it is ready.
-    // fd[0] will be parent's end, and the child will write on fd[1]
-    int fd[2];
-    if (pipe(fd)) {
+    unique_fd pipe_read, pipe_write;
+    if (!Pipe(&pipe_read, &pipe_write)) {
         fprintf(stderr, "pipe failed in launch_server, errno: %d\n", errno);
         return -1;
     }
@@ -899,11 +898,10 @@
 
     if (pid == 0) {
         // child side of the fork
-
-        adb_close(fd[0]);
+        pipe_read.reset();
 
         char reply_fd[30];
-        snprintf(reply_fd, sizeof(reply_fd), "%d", fd[1]);
+        snprintf(reply_fd, sizeof(reply_fd), "%d", pipe_write.get());
         // child process
         int result = execl(path.c_str(), "adb", "-L", socket_spec.c_str(), "fork-server", "server",
                            "--reply-fd", reply_fd, NULL);
@@ -913,10 +911,10 @@
         // parent side of the fork
         char temp[3] = {};
         // wait for the "OK\n" message
-        adb_close(fd[1]);
-        int ret = adb_read(fd[0], temp, 3);
+        pipe_write.reset();
+        int ret = adb_read(pipe_read.get(), temp, 3);
         int saved_errno = errno;
-        adb_close(fd[0]);
+        pipe_read.reset();
         if (ret < 0) {
             fprintf(stderr, "could not read ok from ADB Server, errno = %d\n", saved_errno);
             return -1;
@@ -1103,14 +1101,11 @@
     if (!strcmp(service, "reconnect-offline")) {
         std::string response;
         close_usb_devices([&response](const atransport* transport) {
-            switch (transport->GetConnectionState()) {
-                case kCsOffline:
-                case kCsUnauthorized:
-                    response += "reconnecting " + transport->serial_name() + "\n";
-                    return true;
-                default:
-                    return false;
+            if (!ConnectionStateIsOnline(transport->GetConnectionState())) {
+                response += "reconnecting " + transport->serial_name() + "\n";
+                return true;
             }
+            return false;
         });
         if (!response.empty()) {
             response.resize(response.size() - 1);
diff --git a/adb/adb.h b/adb/adb.h
index 65b5fc0..ede55da 100644
--- a/adb/adb.h
+++ b/adb/adb.h
@@ -28,6 +28,7 @@
 #include "adb_trace.h"
 #include "fdevent.h"
 #include "socket.h"
+#include "types.h"
 #include "usb.h"
 
 constexpr size_t MAX_PAYLOAD_V1 = 4 * 1024;
@@ -63,20 +64,6 @@
 using TransportId = uint64_t;
 class atransport;
 
-struct amessage {
-    uint32_t command;     /* command identifier constant      */
-    uint32_t arg0;        /* first argument                   */
-    uint32_t arg1;        /* second argument                  */
-    uint32_t data_length; /* length of payload (0 is allowed) */
-    uint32_t data_check;  /* checksum of data payload         */
-    uint32_t magic;       /* command ^ 0xffffffff             */
-};
-
-struct apacket {
-    amessage msg;
-    std::string payload;
-};
-
 uint32_t calculate_apacket_checksum(const apacket* packet);
 
 /* the adisconnect structure is used to record a callback that
@@ -108,16 +95,33 @@
 
 enum ConnectionState {
     kCsAny = -1,
-    kCsOffline = 0,
+
+    kCsConnecting = 0,  // Haven't received a response from the device yet.
+    kCsAuthorizing,     // Authorizing with keys from ADB_VENDOR_KEYS.
+    kCsUnauthorized,    // ADB_VENDOR_KEYS exhausted, fell back to user prompt.
+    kCsNoPerm,          // Insufficient permissions to communicate with the device.
+    kCsOffline,
+
     kCsBootloader,
     kCsDevice,
     kCsHost,
     kCsRecovery,
-    kCsNoPerm,  // Insufficient permissions to communicate with the device.
     kCsSideload,
-    kCsUnauthorized,
 };
 
+inline bool ConnectionStateIsOnline(ConnectionState state) {
+    switch (state) {
+        case kCsBootloader:
+        case kCsDevice:
+        case kCsHost:
+        case kCsRecovery:
+        case kCsSideload:
+            return true;
+        default:
+            return false;
+    }
+}
+
 void print_packet(const char* label, apacket* p);
 
 // These use the system (v)fprintf, not the adb prefixed ones defined in sysdeps.h, so they
diff --git a/adb/adb_listeners.cpp b/adb/adb_listeners.cpp
index fecf452..ea5a44e 100644
--- a/adb/adb_listeners.cpp
+++ b/adb/adb_listeners.cpp
@@ -42,7 +42,7 @@
     alistener(const std::string& _local_name, const std::string& _connect_to);
     ~alistener();
 
-    fdevent fde;
+    fdevent* fde = nullptr;
     int fd = -1;
 
     std::string local_name;
@@ -60,7 +60,7 @@
 
 alistener::~alistener() {
     // Closes the corresponding fd.
-    fdevent_remove(&fde);
+    fdevent_destroy(fde);
 
     if (transport) {
         transport->RemoveDisconnect(&disconnect);
@@ -222,11 +222,11 @@
 
     close_on_exec(listener->fd);
     if (listener->connect_to == "*smartsocket*") {
-        fdevent_install(&listener->fde, listener->fd, ss_listener_event_func, listener.get());
+        listener->fde = fdevent_create(listener->fd, ss_listener_event_func, listener.get());
     } else {
-        fdevent_install(&listener->fde, listener->fd, listener_event_func, listener.get());
+        listener->fde = fdevent_create(listener->fd, listener_event_func, listener.get());
     }
-    fdevent_set(&listener->fde, FDE_READ);
+    fdevent_set(listener->fde, FDE_READ);
 
     listener->transport = transport;
 
diff --git a/adb/adb_unique_fd.cpp b/adb/adb_unique_fd.cpp
new file mode 100644
index 0000000..2079be1
--- /dev/null
+++ b/adb/adb_unique_fd.cpp
@@ -0,0 +1,65 @@
+/*
+ * 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 "adb_unique_fd.h"
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "sysdeps.h"
+
+#if !defined(_WIN32)
+bool Pipe(unique_fd* read, unique_fd* write, int flags) {
+    int pipefd[2];
+#if !defined(__APPLE__)
+    if (pipe2(pipefd, flags) != 0) {
+        return false;
+    }
+#else
+    // Darwin doesn't have pipe2. Implement it ourselves.
+    if (flags != 0 && (flags & ~(O_CLOEXEC | O_NONBLOCK)) != 0) {
+        errno = EINVAL;
+        return false;
+    }
+
+    if (pipe(pipefd) != 0) {
+        return false;
+    }
+
+    if (flags & O_CLOEXEC) {
+        if (fcntl(pipefd[0], F_SETFD, FD_CLOEXEC) != 0 ||
+            fcntl(pipefd[1], F_SETFD, FD_CLOEXEC) != 0) {
+            adb_close(pipefd[0]);
+            adb_close(pipefd[1]);
+            return false;
+        }
+    }
+
+    if (flags & O_NONBLOCK) {
+        if (fcntl(pipefd[0], F_SETFL, O_NONBLOCK) != 0 ||
+            fcntl(pipefd[1], F_SETFL, O_NONBLOCK) != 0) {
+            adb_close(pipefd[0]);
+            adb_close(pipefd[1]);
+            return false;
+        }
+    }
+#endif
+
+    read->reset(pipefd[0]);
+    write->reset(pipefd[1]);
+    return true;
+}
+#endif
diff --git a/adb/adb_unique_fd.h b/adb/adb_unique_fd.h
index 34c1bbc..be63262 100644
--- a/adb/adb_unique_fd.h
+++ b/adb/adb_unique_fd.h
@@ -16,6 +16,9 @@
 
 #pragma once
 
+#include <errno.h>
+#include <unistd.h>
+
 #include <android-base/unique_fd.h>
 
 // Helper to automatically close an FD when it goes out of scope.
@@ -24,3 +27,7 @@
 };
 
 using unique_fd = android::base::unique_fd_impl<AdbCloser>;
+
+#if !defined(_WIN32)
+bool Pipe(unique_fd* read, unique_fd* write, int flags = 0);
+#endif
diff --git a/adb/benchmark_device.py b/adb/benchmark_device.py
new file mode 100755
index 0000000..00c2315
--- /dev/null
+++ b/adb/benchmark_device.py
@@ -0,0 +1,120 @@
+#!/usr/bin/env python3
+#
+# 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.
+#
+
+import os
+import statistics
+import time
+
+import adb
+
+def lock_min(device):
+    device.shell_nocheck(["""
+        for x in /sys/devices/system/cpu/cpu?/cpufreq; do
+            echo userspace > $x/scaling_governor
+            cat $x/scaling_min_freq > $x/scaling_setspeed
+        done
+    """])
+
+def lock_max(device):
+    device.shell_nocheck(["""
+        for x in /sys/devices/system/cpu/cpu?/cpufreq; do
+            echo userspace > $x/scaling_governor
+            cat $x/scaling_max_freq > $x/scaling_setspeed
+        done
+    """])
+
+def unlock(device):
+    device.shell_nocheck(["""
+        for x in /sys/devices/system/cpu/cpu?/cpufreq; do
+            echo ondemand > $x/scaling_governor
+            echo sched > $x/scaling_governor
+            echo schedutil > $x/scaling_governor
+        done
+    """])
+
+def harmonic_mean(xs):
+    return 1.0 / statistics.mean([1.0 / x for x in xs])
+
+def analyze(name, speeds):
+    median = statistics.median(speeds)
+    mean = harmonic_mean(speeds)
+    stddev = statistics.stdev(speeds)
+    msg = "%s: %d runs: median %.2f MiB/s, mean %.2f MiB/s, stddev: %.2f MiB/s"
+    print(msg % (name, len(speeds), median, mean, stddev))
+
+def benchmark_push(device=None, file_size_mb=100):
+    if device == None:
+        device = adb.get_device()
+
+    lock_max(device)
+
+    remote_path = "/dev/null"
+    local_path = "/tmp/adb_benchmark_temp"
+
+    with open(local_path, "wb") as f:
+        f.truncate(file_size_mb * 1024 * 1024)
+
+    speeds = list()
+    for _ in range(0, 5):
+        begin = time.time()
+        device.push(local=local_path, remote=remote_path)
+        end = time.time()
+        speeds.append(file_size_mb / float(end - begin))
+
+    analyze("push %dMiB" % file_size_mb, speeds)
+
+def benchmark_pull(device=None, file_size_mb=100):
+    if device == None:
+        device = adb.get_device()
+
+    lock_max(device)
+
+    remote_path = "/data/local/tmp/adb_benchmark_temp"
+    local_path = "/tmp/adb_benchmark_temp"
+
+    device.shell(["dd", "if=/dev/zero", "of=" + remote_path, "bs=1m",
+                  "count=" + str(file_size_mb)])
+    speeds = list()
+    for _ in range(0, 5):
+        begin = time.time()
+        device.pull(remote=remote_path, local=local_path)
+        end = time.time()
+        speeds.append(file_size_mb / float(end - begin))
+
+    analyze("pull %dMiB" % file_size_mb, speeds)
+
+def benchmark_shell(device=None, file_size_mb=100):
+    if device == None:
+        device = adb.get_device()
+
+    lock_max(device)
+
+    speeds = list()
+    for _ in range(0, 5):
+        begin = time.time()
+        device.shell(["dd", "if=/dev/zero", "bs=1m",
+                      "count=" + str(file_size_mb)])
+        end = time.time()
+        speeds.append(file_size_mb / float(end - begin))
+
+    analyze("shell %dMiB" % file_size_mb, speeds)
+
+def main():
+    benchmark_pull()
+
+if __name__ == "__main__":
+    main()
diff --git a/adb/adb_client.cpp b/adb/client/adb_client.cpp
similarity index 100%
rename from adb/adb_client.cpp
rename to adb/client/adb_client.cpp
diff --git a/adb/adb_client.h b/adb/client/adb_client.h
similarity index 100%
rename from adb/adb_client.h
rename to adb/client/adb_client.h
diff --git a/adb/adb_auth_host.cpp b/adb/client/auth.cpp
similarity index 98%
rename from adb/adb_auth_host.cpp
rename to adb/client/auth.cpp
index c3aef16..0f4dd33 100644
--- a/adb/adb_auth_host.cpp
+++ b/adb/client/auth.cpp
@@ -454,10 +454,8 @@
     p->msg.command = A_AUTH;
     p->msg.arg0 = ADB_AUTH_RSAPUBLICKEY;
 
-    p->payload = std::move(key);
-
     // adbd expects a null-terminated string.
-    p->payload.push_back('\0');
+    p->payload.assign(key.data(), key.data() + key.size() + 1);
     p->msg.data_length = p->payload.size();
     send_packet(p, t);
 }
@@ -466,6 +464,7 @@
     std::shared_ptr<RSA> key = t->NextKey();
     if (key == nullptr) {
         // No more private keys to try, send the public key.
+        t->SetConnectionState(kCsUnauthorized);
         send_auth_publickey(t);
         return;
     }
@@ -482,7 +481,7 @@
 
     p->msg.command = A_AUTH;
     p->msg.arg0 = ADB_AUTH_SIGNATURE;
-    p->payload = std::move(result);
+    p->payload.assign(result.begin(), result.end());
     p->msg.data_length = p->payload.size();
     send_packet(p, t);
 }
diff --git a/adb/bugreport.cpp b/adb/client/bugreport.cpp
similarity index 100%
rename from adb/bugreport.cpp
rename to adb/client/bugreport.cpp
diff --git a/adb/bugreport.h b/adb/client/bugreport.h
similarity index 100%
rename from adb/bugreport.h
rename to adb/client/bugreport.h
diff --git a/adb/commandline.cpp b/adb/client/commandline.cpp
similarity index 99%
rename from adb/commandline.cpp
rename to adb/client/commandline.cpp
index 6981ff2..c41db24 100644
--- a/adb/commandline.cpp
+++ b/adb/client/commandline.cpp
@@ -1136,8 +1136,7 @@
         cmd += " " + escape_arg(*argv++);
     }
 
-    // No need for shell protocol with logcat, always disable for simplicity.
-    return send_shell_command(cmd, true);
+    return send_shell_command(cmd);
 }
 
 static void write_zeros(int bytes, int fd) {
@@ -1861,7 +1860,7 @@
         cmd += " " + escape_arg(*argv++);
     }
 
-    return send_shell_command(cmd, false);
+    return send_shell_command(cmd);
 }
 
 static int install_app(int argc, const char** argv) {
@@ -2049,7 +2048,7 @@
         cmd += " " + escape_arg(*argv++);
     }
 
-    return send_shell_command(cmd, false);
+    return send_shell_command(cmd);
 }
 
 static int uninstall_app_legacy(int argc, const char** argv) {
@@ -2073,7 +2072,7 @@
 
 static int delete_file(const std::string& filename) {
     std::string cmd = "rm -f " + escape_arg(filename);
-    return send_shell_command(cmd, false);
+    return send_shell_command(cmd);
 }
 
 static int install_app_legacy(int argc, const char** argv) {
diff --git a/adb/commandline.h b/adb/client/commandline.h
similarity index 94%
rename from adb/commandline.h
rename to adb/client/commandline.h
index 36cd798..3d10030 100644
--- a/adb/commandline.h
+++ b/adb/client/commandline.h
@@ -92,7 +92,7 @@
 // resulting output.
 // if |callback| is non-null, stdout/stderr output will be handled by it.
 int send_shell_command(
-    const std::string& command, bool disable_shell_protocol,
-    StandardStreamsCallbackInterface* callback = &DEFAULT_STANDARD_STREAMS_CALLBACK);
+        const std::string& command, bool disable_shell_protocol = false,
+        StandardStreamsCallbackInterface* callback = &DEFAULT_STANDARD_STREAMS_CALLBACK);
 
 #endif  // COMMANDLINE_H
diff --git a/adb/console.cpp b/adb/client/console.cpp
similarity index 100%
rename from adb/console.cpp
rename to adb/client/console.cpp
diff --git a/adb/file_sync_client.cpp b/adb/client/file_sync_client.cpp
similarity index 100%
rename from adb/file_sync_client.cpp
rename to adb/client/file_sync_client.cpp
diff --git a/adb/line_printer.cpp b/adb/client/line_printer.cpp
similarity index 100%
rename from adb/line_printer.cpp
rename to adb/client/line_printer.cpp
diff --git a/adb/line_printer.h b/adb/client/line_printer.h
similarity index 100%
rename from adb/line_printer.h
rename to adb/client/line_printer.h
diff --git a/adb/client/main.cpp b/adb/client/main.cpp
index 31cb853..44ed3a2 100644
--- a/adb/client/main.cpp
+++ b/adb/client/main.cpp
@@ -117,6 +117,7 @@
     atexit(adb_server_cleanup);
 
     init_transport_registration();
+    init_reconnect_handler();
     init_mdns_transport_discovery();
 
     usb_init();
diff --git a/adb/transport_mdns.cpp b/adb/client/transport_mdns.cpp
similarity index 93%
rename from adb/transport_mdns.cpp
rename to adb/client/transport_mdns.cpp
index 3603f09..283fac5 100644
--- a/adb/transport_mdns.cpp
+++ b/adb/client/transport_mdns.cpp
@@ -35,7 +35,7 @@
 #include "sysdeps.h"
 
 static DNSServiceRef service_ref;
-static fdevent service_ref_fde;
+static fdevent* service_ref_fde;
 
 // Use adb_DNSServiceRefSockFD() instead of calling DNSServiceRefSockFD()
 // directly so that the socket is put through the appropriate compatibility
@@ -68,27 +68,26 @@
     }
 
     virtual ~AsyncServiceRef() {
-        if (! initialized_) {
+        if (!initialized_) {
             return;
         }
 
         DNSServiceRefDeallocate(sdRef_);
-        fdevent_remove(&fde_);
+        fdevent_destroy(fde_);
     }
 
   protected:
     DNSServiceRef sdRef_;
 
     void Initialize() {
-        fdevent_install(&fde_, adb_DNSServiceRefSockFD(sdRef_),
-                        pump_service_ref, &sdRef_);
-        fdevent_set(&fde_, FDE_READ);
+        fde_ = fdevent_create(adb_DNSServiceRefSockFD(sdRef_), pump_service_ref, &sdRef_);
+        fdevent_set(fde_, FDE_READ);
         initialized_ = true;
     }
 
   private:
-    bool initialized_;
-    fdevent fde_;
+    bool initialized_ = false;
+    fdevent* fde_;
 };
 
 class ResolvedService : public AsyncServiceRef {
@@ -252,14 +251,12 @@
     if (errorCode != kDNSServiceErr_NoError) {
         D("Got error %d during mDNS browse.", errorCode);
         DNSServiceRefDeallocate(sdRef);
-        fdevent_remove(&service_ref_fde);
+        fdevent_destroy(service_ref_fde);
         return;
     }
 
-    auto discovered = new DiscoveredService(interfaceIndex, serviceName,
-                                            regtype, domain);
-
-    if (! discovered->Initialized()) {
+    auto discovered = new DiscoveredService(interfaceIndex, serviceName, regtype, domain);
+    if (!discovered->Initialized()) {
         delete discovered;
     }
 }
@@ -274,9 +271,9 @@
     }
 
     fdevent_run_on_main_thread([]() {
-        fdevent_install(&service_ref_fde, adb_DNSServiceRefSockFD(service_ref), pump_service_ref,
-                        &service_ref);
-        fdevent_set(&service_ref_fde, FDE_READ);
+        service_ref_fde =
+            fdevent_create(adb_DNSServiceRefSockFD(service_ref), pump_service_ref, &service_ref);
+        fdevent_set(service_ref_fde, FDE_READ);
     });
 }
 
diff --git a/adb/client/usb_windows.cpp b/adb/client/usb_windows.cpp
index 9751ebf..f529e8f 100644
--- a/adb/client/usb_windows.cpp
+++ b/adb/client/usb_windows.cpp
@@ -75,7 +75,7 @@
 static const GUID usb_class_id = ANDROID_USB_CLASS_ID;
 
 /// List of opened usb handles
-static std::vector<usb_handle*> handle_list;
+static std::vector<usb_handle*>& handle_list = *new std::vector<usb_handle*>();
 
 /// Locker for the list of opened usb handles
 static std::mutex& usb_lock = *new std::mutex();
diff --git a/adb/adbd_auth.cpp b/adb/daemon/auth.cpp
similarity index 93%
rename from adb/adbd_auth.cpp
rename to adb/daemon/auth.cpp
index 3fd2b31..f0c3629 100644
--- a/adb/adbd_auth.cpp
+++ b/adb/daemon/auth.cpp
@@ -35,8 +35,8 @@
 #include <openssl/rsa.h>
 #include <openssl/sha.h>
 
-static fdevent listener_fde;
-static fdevent framework_fde;
+static fdevent* listener_fde = nullptr;
+static fdevent* framework_fde = nullptr;
 static int framework_fd = -1;
 
 static void usb_disconnected(void* unused, atransport* t);
@@ -106,8 +106,10 @@
 
 static void framework_disconnected() {
     LOG(INFO) << "Framework disconnect";
-    fdevent_remove(&framework_fde);
-    framework_fd = -1;
+    if (framework_fde) {
+        fdevent_destroy(framework_fde);
+        framework_fd = -1;
+    }
 }
 
 static void adbd_auth_event(int fd, unsigned events, void*) {
@@ -168,8 +170,8 @@
     }
 
     framework_fd = s;
-    fdevent_install(&framework_fde, framework_fd, adbd_auth_event, nullptr);
-    fdevent_add(&framework_fde, FDE_READ);
+    framework_fde = fdevent_create(framework_fd, adbd_auth_event, nullptr);
+    fdevent_add(framework_fde, FDE_READ);
 
     if (needs_retry) {
         needs_retry = false;
@@ -198,8 +200,8 @@
         return;
     }
 
-    fdevent_install(&listener_fde, fd, adbd_auth_listener, NULL);
-    fdevent_add(&listener_fde, FDE_READ);
+    listener_fde = fdevent_create(fd, adbd_auth_listener, NULL);
+    fdevent_add(listener_fde, FDE_READ);
 }
 
 void send_auth_request(atransport* t) {
diff --git a/adb/file_sync_service.cpp b/adb/daemon/file_sync_service.cpp
similarity index 100%
rename from adb/file_sync_service.cpp
rename to adb/daemon/file_sync_service.cpp
diff --git a/adb/framebuffer_service.cpp b/adb/daemon/framebuffer_service.cpp
similarity index 100%
rename from adb/framebuffer_service.cpp
rename to adb/daemon/framebuffer_service.cpp
diff --git a/adb/jdwp_service.cpp b/adb/daemon/jdwp_service.cpp
similarity index 96%
rename from adb/jdwp_service.cpp
rename to adb/daemon/jdwp_service.cpp
index 5f070d9..367695d 100644
--- a/adb/jdwp_service.cpp
+++ b/adb/daemon/jdwp_service.cpp
@@ -128,7 +128,7 @@
 static void jdwp_process_list_updated(void);
 
 struct JdwpProcess;
-static std::list<std::unique_ptr<JdwpProcess>> _jdwp_list;
+static auto& _jdwp_list = *new std::list<std::unique_ptr<JdwpProcess>>();
 
 struct JdwpProcess {
     explicit JdwpProcess(int socket) {
@@ -139,8 +139,6 @@
             fatal("could not create fdevent for new JDWP process");
         }
 
-        this->fde->state |= FDE_DONT_CLOSE;
-
         /* start by waiting for the PID */
         fdevent_add(this->fde, FDE_READ);
     }
@@ -148,7 +146,6 @@
     ~JdwpProcess() {
         if (this->socket >= 0) {
             adb_shutdown(this->socket);
-            adb_close(this->socket);
             this->socket = -1;
         }
 
@@ -457,7 +454,7 @@
     delete s;
 }
 
-static int jdwp_socket_enqueue(asocket* s, std::string) {
+static int jdwp_socket_enqueue(asocket* s, apacket::payload_type) {
     /* you can't write to this asocket */
     D("LS(%d): JDWP socket received data?", s->id);
     s->peer->close(s->peer);
@@ -472,7 +469,7 @@
      * on the second one, close the connection
      */
     if (!jdwp->pass) {
-        std::string data;
+        apacket::payload_type data;
         data.resize(s->get_max_payload());
         size_t len = jdwp_process_list(&data[0], data.size());
         data.resize(len);
@@ -509,7 +506,7 @@
     bool need_initial;
 };
 
-static std::vector<std::unique_ptr<JdwpTracker>> _jdwp_trackers;
+static auto& _jdwp_trackers = *new std::vector<std::unique_ptr<JdwpTracker>>();
 
 static void jdwp_process_list_updated(void) {
     std::string data;
@@ -519,7 +516,8 @@
     for (auto& t : _jdwp_trackers) {
         if (t->peer) {
             // The tracker might not have been connected yet.
-            t->peer->enqueue(t->peer, data);
+            apacket::payload_type payload(data.begin(), data.end());
+            t->peer->enqueue(t->peer, std::move(payload));
         }
     }
 }
@@ -545,7 +543,7 @@
     JdwpTracker* t = (JdwpTracker*)s;
 
     if (t->need_initial) {
-        std::string data;
+        apacket::payload_type data;
         data.resize(s->get_max_payload());
         data.resize(jdwp_process_list_msg(&data[0], data.size()));
         t->need_initial = false;
@@ -553,7 +551,7 @@
     }
 }
 
-static int jdwp_tracker_enqueue(asocket* s, std::string) {
+static int jdwp_tracker_enqueue(asocket* s, apacket::payload_type) {
     /* you can't write to this socket */
     D("LS(%d): JDWP tracker received data?", s->id);
     s->peer->close(s->peer);
diff --git a/adb/daemon/main.cpp b/adb/daemon/main.cpp
index 5adeb44..c02cafa 100644
--- a/adb/daemon/main.cpp
+++ b/adb/daemon/main.cpp
@@ -20,6 +20,7 @@
 
 #include <errno.h>
 #include <getopt.h>
+#include <malloc.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -37,7 +38,6 @@
 #include <scoped_minijail.h>
 
 #include <private/android_filesystem_config.h>
-#include "debuggerd/handler.h"
 #include "selinux/android.h"
 
 #include "adb.h"
@@ -183,9 +183,10 @@
     // descriptor will always be open.
     adbd_cloexec_auth_socket();
 
-    if (ALLOW_ADBD_NO_AUTH && !android::base::GetBoolProperty("ro.adb.secure", false)) {
-        auth_required = false;
-    }
+#if 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);
+#endif
 
     adbd_auth_init();
 
@@ -237,6 +238,9 @@
 }
 
 int main(int argc, char** argv) {
+    // Set M_DECAY_TIME so that our allocations aren't immediately purged on free.
+    mallopt(M_DECAY_TIME, 1);
+
     while (true) {
         static struct option opts[] = {
             {"root_seclabel", required_argument, nullptr, 's'},
@@ -269,7 +273,6 @@
 
     close_stdin();
 
-    debuggerd_init(nullptr);
     adb_trace_init(argv);
 
     D("Handling main()");
diff --git a/adb/daemon/remount_service.cpp b/adb/daemon/remount_service.cpp
new file mode 100644
index 0000000..830b35d
--- /dev/null
+++ b/adb/daemon/remount_service.cpp
@@ -0,0 +1,299 @@
+/*
+ * 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.
+ */
+
+#define TRACE_TAG ADB
+
+#include "sysdeps.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <mntent.h>
+#include <spawn.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mount.h>
+#include <sys/vfs.h>
+#include <unistd.h>
+
+#include <set>
+#include <string>
+#include <vector>
+
+#include <android-base/properties.h>
+#include <bootloader_message/bootloader_message.h>
+#include <cutils/android_reboot.h>
+#include <ext4_utils/ext4_utils.h>
+
+#include "adb.h"
+#include "adb_io.h"
+#include "adb_unique_fd.h"
+#include "adb_utils.h"
+#include "fs_mgr.h"
+
+// Returns the device used to mount a directory in /proc/mounts.
+static std::string find_proc_mount(const char* dir) {
+    std::unique_ptr<FILE, int(*)(FILE*)> fp(setmntent("/proc/mounts", "r"), endmntent);
+    if (!fp) {
+        return "";
+    }
+
+    mntent* e;
+    while ((e = getmntent(fp.get())) != nullptr) {
+        if (strcmp(dir, e->mnt_dir) == 0) {
+            return e->mnt_fsname;
+        }
+    }
+    return "";
+}
+
+// Returns the device used to mount a directory in the fstab.
+static std::string find_fstab_mount(const char* dir) {
+    std::unique_ptr<fstab, decltype(&fs_mgr_free_fstab)> fstab(fs_mgr_read_fstab_default(),
+                                                               fs_mgr_free_fstab);
+    struct fstab_rec* rec = fs_mgr_get_entry_for_mount_point(fstab.get(), dir);
+    return rec ? rec->blk_device : "";
+}
+
+// The proc entry for / is full of lies, so check fstab instead.
+// /proc/mounts lists rootfs and /dev/root, neither of which is what we want.
+static std::string find_mount(const char* dir, bool is_root) {
+    if (is_root) {
+        return find_fstab_mount(dir);
+    } else {
+       return find_proc_mount(dir);
+    }
+}
+
+bool make_block_device_writable(const std::string& dev) {
+    int fd = unix_open(dev.c_str(), O_RDONLY | O_CLOEXEC);
+    if (fd == -1) {
+        return false;
+    }
+
+    int OFF = 0;
+    bool result = (ioctl(fd, BLKROSET, &OFF) != -1);
+    unix_close(fd);
+    return result;
+}
+
+static bool fs_has_shared_blocks(const char* dev) {
+    struct statfs fs;
+    if (statfs(dev, &fs) == -1 || fs.f_type == EXT4_SUPER_MAGIC) {
+        return false;
+    }
+    unique_fd fd(unix_open(dev, O_RDONLY));
+    if (fd < 0) {
+        return false;
+    }
+    struct ext4_super_block sb;
+    if (lseek64(fd, 1024, SEEK_SET) < 0 || unix_read(fd, &sb, sizeof(sb)) < 0) {
+        return false;
+    }
+    struct fs_info info;
+    if (ext4_parse_sb(&sb, &info) < 0) {
+        return false;
+    }
+    return (info.feat_ro_compat & EXT4_FEATURE_RO_COMPAT_SHARED_BLOCKS) != 0;
+}
+
+static bool can_unshare_blocks(int fd, const char* dev) {
+    const char* E2FSCK_BIN = "/system/bin/e2fsck";
+    if (access(E2FSCK_BIN, X_OK)) {
+        WriteFdFmt(fd, "e2fsck is not available, cannot undo deduplication on %s\n", dev);
+        return false;
+    }
+
+    pid_t child;
+    char* env[] = {nullptr};
+    const char* argv[] = {E2FSCK_BIN, "-n", "-E", "unshare_blocks", dev, nullptr};
+    if (posix_spawn(&child, E2FSCK_BIN, nullptr, nullptr, const_cast<char**>(argv), env)) {
+        WriteFdFmt(fd, "failed to e2fsck to check deduplication: %s\n", strerror(errno));
+        return false;
+    }
+    int status = 0;
+    int ret = TEMP_FAILURE_RETRY(waitpid(child, &status, 0));
+    if (ret < 0) {
+        WriteFdFmt(fd, "failed to get e2fsck status: %s\n", strerror(errno));
+        return false;
+    }
+    if (!WIFEXITED(status)) {
+        WriteFdFmt(fd, "e2fsck exited abnormally with status %d\n", status);
+        return false;
+    }
+    int rc = WEXITSTATUS(status);
+    if (rc != 0) {
+        WriteFdFmt(fd,
+                   "%s is deduplicated, and an e2fsck check failed. It might not "
+                   "have enough free-space to be remounted as writable.\n",
+                   dev);
+        return false;
+    }
+    return true;
+}
+
+static bool remount_partition(int fd, const char* dir) {
+    if (!directory_exists(dir)) {
+        return true;
+    }
+    bool is_root = strcmp(dir, "/") == 0;
+    std::string dev = find_mount(dir, is_root);
+    // Even if the device for the root is not found, we still try to remount it
+    // as rw. This typically only happens when running Android in a container:
+    // the root will almost always be in a loop device, which is dynamic, so
+    // it's not convenient to put in the fstab.
+    if (dev.empty() && !is_root) {
+        return true;
+    }
+    if (!dev.empty() && !make_block_device_writable(dev)) {
+        WriteFdFmt(fd, "remount of %s failed; couldn't make block device %s writable: %s\n",
+                   dir, dev.c_str(), strerror(errno));
+        return false;
+    }
+    if (mount(dev.c_str(), dir, "none", MS_REMOUNT | MS_BIND, nullptr) == -1) {
+        // This is useful for cases where the superblock is already marked as
+        // read-write, but the mount itself is read-only, such as containers
+        // where the remount with just MS_REMOUNT is forbidden by the kernel.
+        WriteFdFmt(fd, "remount of the %s mount failed: %s.\n", dir, strerror(errno));
+        return false;
+    }
+    if (mount(dev.c_str(), dir, "none", MS_REMOUNT, nullptr) == -1) {
+        WriteFdFmt(fd, "remount of the %s superblock failed: %s\n", dir, strerror(errno));
+        return false;
+    }
+    return true;
+}
+
+static void reboot_for_remount(int fd, bool need_fsck) {
+    std::string reboot_cmd = "reboot";
+    if (need_fsck) {
+        const std::vector<std::string> options = {"--fsck_unshare_blocks"};
+        std::string err;
+        if (!write_bootloader_message(options, &err)) {
+            WriteFdFmt(fd, "Failed to set bootloader message: %s\n", err.c_str());
+            return;
+        }
+
+        WriteFdExactly(fd,
+                       "The device will now reboot to recovery and attempt "
+                       "un-deduplication.\n");
+        reboot_cmd = "reboot,recovery";
+    }
+
+    sync();
+    android::base::SetProperty(ANDROID_RB_PROPERTY, reboot_cmd.c_str());
+}
+
+void remount_service(int fd, void* cookie) {
+    unique_fd close_fd(fd);
+
+    const char* cmd = reinterpret_cast<const char*>(cookie);
+    bool user_requested_reboot = cmd && !strcmp(cmd, "-R");
+
+    if (getuid() != 0) {
+        WriteFdExactly(fd, "Not running as root. Try \"adb root\" first.\n");
+        return;
+    }
+
+    bool system_verified = !(android::base::GetProperty("partition.system.verified", "").empty());
+    bool vendor_verified = !(android::base::GetProperty("partition.vendor.verified", "").empty());
+
+    std::vector<std::string> partitions = {"/odm", "/oem", "/product", "/vendor"};
+    if (android::base::GetBoolProperty("ro.build.system_root_image", false)) {
+        partitions.push_back("/");
+    } else {
+        partitions.push_back("/system");
+    }
+
+    // Find partitions that are deduplicated, and can be un-deduplicated.
+    std::set<std::string> dedup;
+    for (const auto& partition : partitions) {
+        std::string dev = find_mount(partition.c_str(), partition == "/");
+        if (dev.empty() || !fs_has_shared_blocks(dev.c_str())) {
+            continue;
+        }
+        if (can_unshare_blocks(fd, dev.c_str())) {
+            dedup.emplace(partition);
+        }
+    }
+
+    bool verity_enabled = (system_verified || vendor_verified);
+
+    // Reboot now if the user requested it (and an operation needs a reboot).
+    if (user_requested_reboot) {
+        if (!dedup.empty() || verity_enabled) {
+            if (verity_enabled) {
+                set_verity_enabled_state_service(fd, nullptr);
+            }
+            reboot_for_remount(fd, !dedup.empty());
+            return;
+        }
+        WriteFdExactly(fd, "No reboot needed, skipping -R.\n");
+    }
+
+    // If we need to disable-verity, but we also need to perform a recovery
+    // fsck for deduplicated partitions, hold off on warning about verity. We
+    // can handle both verity and the recovery fsck in the same reboot cycle.
+    if (verity_enabled && dedup.empty()) {
+        // Allow remount but warn of likely bad effects
+        bool both = system_verified && vendor_verified;
+        WriteFdFmt(fd,
+                   "dm_verity is enabled on the %s%s%s partition%s.\n",
+                   system_verified ? "system" : "",
+                   both ? " and " : "",
+                   vendor_verified ? "vendor" : "",
+                   both ? "s" : "");
+        WriteFdExactly(fd,
+                       "Use \"adb disable-verity\" to disable verity.\n"
+                       "If you do not, remount may succeed, however, you will still "
+                       "not be able to write to these volumes.\n");
+        WriteFdExactly(fd,
+                       "Alternately, use \"adb remount -R\" to disable verity "
+                       "and automatically reboot.\n");
+    }
+
+    bool success = true;
+    for (const auto& partition : partitions) {
+        // Don't try to remount partitions that need an fsck in recovery.
+        if (dedup.count(partition)) {
+            continue;
+        }
+        success &= remount_partition(fd, partition.c_str());
+    }
+
+    if (!dedup.empty()) {
+        WriteFdExactly(fd,
+                       "The following partitions are deduplicated and cannot "
+                       "yet be remounted:\n");
+        for (const std::string& name : dedup) {
+            WriteFdFmt(fd, "  %s\n", name.c_str());
+        }
+
+        WriteFdExactly(fd,
+                       "To reboot and un-deduplicate the listed partitions, "
+                       "please retry with adb remount -R.\n");
+        if (system_verified || vendor_verified) {
+            WriteFdExactly(fd, "Note: verity will be automatically disabled after reboot.\n");
+        }
+        return;
+    }
+
+    if (!success) {
+        WriteFdExactly(fd, "remount failed\n");
+    } else {
+        WriteFdExactly(fd, "remount succeeded\n");
+    }
+}
diff --git a/adb/set_verity_enable_state_service.cpp b/adb/daemon/set_verity_enable_state_service.cpp
similarity index 100%
rename from adb/set_verity_enable_state_service.cpp
rename to adb/daemon/set_verity_enable_state_service.cpp
diff --git a/adb/shell_service.cpp b/adb/daemon/shell_service.cpp
similarity index 96%
rename from adb/shell_service.cpp
rename to adb/daemon/shell_service.cpp
index da1222b..56d647a 100644
--- a/adb/shell_service.cpp
+++ b/adb/daemon/shell_service.cpp
@@ -98,6 +98,7 @@
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <private/android_logger.h>
+#include <selinux/android.h>
 
 #include "adb.h"
 #include "adb_io.h"
@@ -343,8 +344,27 @@
                 adb_write(oom_score_adj_fd, oom_score_adj_value, strlen(oom_score_adj_value)));
         }
 
+#ifdef __ANDROID_RECOVERY__
+        // Special routine for recovery. Switch to shell domain when adbd is
+        // is running with dropped privileged (i.e. not running as root) and
+        // is built for the recovery mode. This is required because recovery
+        // rootfs is not labeled and everything is labeled just as rootfs.
+        char* con = nullptr;
+        if (getcon(&con) == 0) {
+            if (!strcmp(con, "u:r:adbd:s0")) {
+                if (selinux_android_setcon("u:r:shell:s0") < 0) {
+                    LOG(FATAL) << "Could not set SELinux context for subprocess";
+                }
+            }
+            freecon(con);
+        } else {
+            LOG(FATAL) << "Failed to get SELinux context";
+        }
+#endif
+
         if (command_.empty()) {
-            execle(_PATH_BSHELL, _PATH_BSHELL, "-", nullptr, cenv.data());
+            // Spawn a login shell if we don't have a command.
+            execle(_PATH_BSHELL, "-" _PATH_BSHELL, nullptr, cenv.data());
         } else {
             execle(_PATH_BSHELL, _PATH_BSHELL, "-c", command_.c_str(), nullptr, cenv.data());
         }
diff --git a/adb/shell_service_test.cpp b/adb/daemon/shell_service_test.cpp
similarity index 100%
rename from adb/shell_service_test.cpp
rename to adb/daemon/shell_service_test.cpp
diff --git a/adb/daemon/usb.cpp b/adb/daemon/usb.cpp
index 7869324..c724b11 100644
--- a/adb/daemon/usb.cpp
+++ b/adb/daemon/usb.cpp
@@ -234,6 +234,10 @@
     for (unsigned i = 0; i < USB_FFS_NUM_BUFS; i++) {
         aiob->iocbs[i] = &aiob->iocb[i];
     }
+    memset(&aiob->ctx, 0, sizeof(aiob->ctx));
+    if (io_setup(USB_FFS_NUM_BUFS, &aiob->ctx)) {
+        D("[ aio: got error on io_setup (%d) ]", errno);
+    }
 }
 
 static int getMaxPacketSize(int ffs_fd) {
@@ -269,7 +273,7 @@
 
     if (h->control < 0) { // might have already done this before
         LOG(INFO) << "opening control endpoint " << USB_FFS_ADB_EP0;
-        h->control = adb_open(USB_FFS_ADB_EP0, O_RDWR);
+        h->control = adb_open(USB_FFS_ADB_EP0, O_WRONLY);
         if (h->control < 0) {
             PLOG(ERROR) << "cannot open control endpoint " << USB_FFS_ADB_EP0;
             goto err;
@@ -300,23 +304,18 @@
         android::base::SetProperty("sys.usb.ffs.ready", "1");
     }
 
-    h->bulk_out = adb_open(USB_FFS_ADB_OUT, O_RDWR);
+    h->bulk_out = adb_open(USB_FFS_ADB_OUT, O_RDONLY);
     if (h->bulk_out < 0) {
         PLOG(ERROR) << "cannot open bulk-out endpoint " << USB_FFS_ADB_OUT;
         goto err;
     }
 
-    h->bulk_in = adb_open(USB_FFS_ADB_IN, O_RDWR);
+    h->bulk_in = adb_open(USB_FFS_ADB_IN, O_WRONLY);
     if (h->bulk_in < 0) {
         PLOG(ERROR) << "cannot open bulk-in endpoint " << USB_FFS_ADB_IN;
         goto err;
     }
 
-    if (io_setup(USB_FFS_NUM_BUFS, &h->read_aiob.ctx) ||
-        io_setup(USB_FFS_NUM_BUFS, &h->write_aiob.ctx)) {
-        D("[ aio: got error on io_setup (%d) ]", errno);
-    }
-
     h->read_aiob.fd = h->bulk_out;
     h->write_aiob.fd = h->bulk_in;
     return true;
@@ -498,8 +497,6 @@
     h->kicked = false;
     adb_close(h->bulk_out);
     adb_close(h->bulk_in);
-    io_destroy(h->read_aiob.ctx);
-    io_destroy(h->write_aiob.ctx);
 
     // Notify usb_adb_open_thread to open a new connection.
     h->lock.lock();
diff --git a/adb/fdevent.cpp b/adb/fdevent.cpp
index 42d851a..1b7758c 100644
--- a/adb/fdevent.cpp
+++ b/adb/fdevent.cpp
@@ -21,6 +21,7 @@
 #include "fdevent.h"
 
 #include <fcntl.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
@@ -36,6 +37,7 @@
 #include <android-base/logging.h>
 #include <android-base/stringprintf.h>
 #include <android-base/thread_annotations.h>
+#include <android-base/threads.h>
 
 #include "adb_io.h"
 #include "adb_trace.h"
@@ -55,7 +57,7 @@
 
   explicit PollNode(fdevent* fde) : fde(fde) {
       memset(&pollfd, 0, sizeof(pollfd));
-      pollfd.fd = fde->fd;
+      pollfd.fd = fde->fd.get();
 
 #if defined(__linux__)
       // Always enable POLLRDHUP, so the host server can take action when some clients disconnect.
@@ -71,21 +73,22 @@
 static auto& g_pending_list = *new std::list<fdevent*>();
 static std::atomic<bool> terminate_loop(false);
 static bool main_thread_valid;
-static unsigned long main_thread_id;
+static uint64_t main_thread_id;
 
+static bool run_needs_flush = false;
 static auto& run_queue_notify_fd = *new unique_fd();
 static auto& run_queue_mutex = *new std::mutex();
 static auto& run_queue GUARDED_BY(run_queue_mutex) = *new std::deque<std::function<void()>>();
 
 void check_main_thread() {
     if (main_thread_valid) {
-        CHECK_EQ(main_thread_id, adb_thread_id());
+        CHECK_EQ(main_thread_id, android::base::GetThreadId());
     }
 }
 
 void set_main_thread() {
     main_thread_valid = true;
-    main_thread_id = adb_thread_id();
+    main_thread_id = android::base::GetThreadId();
 }
 
 static std::string dump_fde(const fdevent* fde) {
@@ -108,37 +111,22 @@
     if (fde->state & FDE_ERROR) {
         state += "E";
     }
-    if (fde->state & FDE_DONT_CLOSE) {
-        state += "D";
-    }
-    return android::base::StringPrintf("(fdevent %d %s)", fde->fd, state.c_str());
-}
-
-fdevent* fdevent_create(int fd, fd_func func, void* arg) {
-    check_main_thread();
-    fdevent *fde = (fdevent*) malloc(sizeof(fdevent));
-    if(fde == 0) return 0;
-    fdevent_install(fde, fd, func, arg);
-    fde->state |= FDE_CREATED;
-    return fde;
-}
-
-void fdevent_destroy(fdevent* fde) {
-    check_main_thread();
-    if(fde == 0) return;
-    if(!(fde->state & FDE_CREATED)) {
-        LOG(FATAL) << "destroying fde not created by fdevent_create(): " << dump_fde(fde);
-    }
-    fdevent_remove(fde);
-    free(fde);
+    return android::base::StringPrintf("(fdevent %d %s)", fde->fd.get(), state.c_str());
 }
 
 void fdevent_install(fdevent* fde, int fd, fd_func func, void* arg) {
     check_main_thread();
     CHECK_GE(fd, 0);
     memset(fde, 0, sizeof(fdevent));
+}
+
+fdevent* fdevent_create(int fd, fd_func func, void* arg) {
+    check_main_thread();
+    CHECK_GE(fd, 0);
+
+    fdevent* fde = new fdevent();
     fde->state = FDE_ACTIVE;
-    fde->fd = fd;
+    fde->fd.reset(fd);
     fde->func = func;
     fde->arg = arg;
     if (!set_file_block_mode(fd, false)) {
@@ -147,30 +135,35 @@
         // to handle it.
         LOG(ERROR) << "failed to set non-blocking mode for fd " << fd;
     }
-    auto pair = g_poll_node_map.emplace(fde->fd, PollNode(fde));
+    auto pair = g_poll_node_map.emplace(fde->fd.get(), PollNode(fde));
     CHECK(pair.second) << "install existing fd " << fd;
-    D("fdevent_install %s", dump_fde(fde).c_str());
+
+    fde->state |= FDE_CREATED;
+    return fde;
 }
 
-void fdevent_remove(fdevent* fde) {
+void fdevent_destroy(fdevent* fde) {
     check_main_thread();
-    D("fdevent_remove %s", dump_fde(fde).c_str());
+    if (fde == 0) return;
+    if (!(fde->state & FDE_CREATED)) {
+        LOG(FATAL) << "destroying fde not created by fdevent_create(): " << dump_fde(fde);
+    }
+
     if (fde->state & FDE_ACTIVE) {
-        g_poll_node_map.erase(fde->fd);
+        g_poll_node_map.erase(fde->fd.get());
         if (fde->state & FDE_PENDING) {
             g_pending_list.remove(fde);
         }
-        if (!(fde->state & FDE_DONT_CLOSE)) {
-            adb_close(fde->fd);
-            fde->fd = -1;
-        }
+        fde->fd.reset();
         fde->state = 0;
         fde->events = 0;
     }
+
+    delete fde;
 }
 
 static void fdevent_update(fdevent* fde, unsigned events) {
-    auto it = g_poll_node_map.find(fde->fd);
+    auto it = g_poll_node_map.find(fde->fd.get());
     CHECK(it != g_poll_node_map.end());
     PollNode& node = it->second;
     if (events & FDE_READ) {
@@ -269,7 +262,7 @@
             auto it = g_poll_node_map.find(pollfd.fd);
             CHECK(it != g_poll_node_map.end());
             fdevent* fde = it->second.fde;
-            CHECK_EQ(fde->fd, pollfd.fd);
+            CHECK_EQ(fde->fd.get(), pollfd.fd);
             fde->events |= events;
             D("%s got events %x", dump_fde(fde).c_str(), events);
             fde->state |= FDE_PENDING;
@@ -284,7 +277,7 @@
     CHECK(fde->state & FDE_PENDING);
     fde->state &= (~FDE_PENDING);
     D("fdevent_call_fdfunc %s", dump_fde(fde).c_str());
-    fde->func(fde->fd, events, fde->arg);
+    fde->func(fde->fd.get(), events, fde->arg);
 }
 
 static void fdevent_run_flush() EXCLUDES(run_queue_mutex) {
@@ -315,7 +308,8 @@
         PLOG(FATAL) << "failed to empty run queue notify fd";
     }
 
-    fdevent_run_flush();
+    // Mark that we need to flush, and then run it at the end of fdevent_loop.
+    run_needs_flush = true;
 }
 
 static void fdevent_run_setup() {
@@ -376,6 +370,11 @@
             g_pending_list.pop_front();
             fdevent_call_fdfunc(fde);
         }
+
+        if (run_needs_flush) {
+            fdevent_run_flush();
+            run_needs_flush = false;
+        }
     }
 }
 
diff --git a/adb/fdevent.h b/adb/fdevent.h
index 896400a..69c4072 100644
--- a/adb/fdevent.h
+++ b/adb/fdevent.h
@@ -22,28 +22,27 @@
 
 #include <functional>
 
+#include "adb_unique_fd.h"
+
 /* events that may be observed */
 #define FDE_READ              0x0001
 #define FDE_WRITE             0x0002
 #define FDE_ERROR             0x0004
 
-/* features that may be set (via the events set/add/del interface) */
-#define FDE_DONT_CLOSE        0x0080
-
 typedef void (*fd_func)(int fd, unsigned events, void *userdata);
 
 struct fdevent {
-    fdevent *next;
-    fdevent *prev;
+    fdevent* next = nullptr;
+    fdevent* prev = nullptr;
 
-    int fd;
-    int force_eof;
+    unique_fd fd;
+    int force_eof = 0;
 
-    uint16_t state;
-    uint16_t events;
+    uint16_t state = 0;
+    uint16_t events = 0;
 
-    fd_func func;
-    void *arg;
+    fd_func func = nullptr;
+    void* arg = nullptr;
 };
 
 /* Allocate and initialize a new fdevent object
@@ -57,15 +56,6 @@
 */
 void fdevent_destroy(fdevent *fde);
 
-/* Initialize an fdevent object that was externally allocated
-*/
-void fdevent_install(fdevent *fde, int fd, fd_func func, void *arg);
-
-/* Uninitialize an fdevent object that was initialized by
-** fdevent_install()
-*/
-void fdevent_remove(fdevent *item);
-
 /* Change which events should cause notifications
 */
 void fdevent_set(fdevent *fde, unsigned events);
diff --git a/adb/fdevent_test.cpp b/adb/fdevent_test.cpp
index e3d5a35..0cb2439 100644
--- a/adb/fdevent_test.cpp
+++ b/adb/fdevent_test.cpp
@@ -31,14 +31,14 @@
 class FdHandler {
   public:
     FdHandler(int read_fd, int write_fd) : read_fd_(read_fd), write_fd_(write_fd) {
-        fdevent_install(&read_fde_, read_fd_, FdEventCallback, this);
-        fdevent_add(&read_fde_, FDE_READ);
-        fdevent_install(&write_fde_, write_fd_, FdEventCallback, this);
+        read_fde_ = fdevent_create(read_fd_, FdEventCallback, this);
+        fdevent_add(read_fde_, FDE_READ);
+        write_fde_ = fdevent_create(write_fd_, FdEventCallback, this);
     }
 
     ~FdHandler() {
-        fdevent_remove(&read_fde_);
-        fdevent_remove(&write_fde_);
+        fdevent_destroy(read_fde_);
+        fdevent_destroy(write_fde_);
     }
 
   private:
@@ -50,7 +50,7 @@
             char c;
             ASSERT_EQ(1, adb_read(fd, &c, 1));
             handler->queue_.push(c);
-            fdevent_add(&handler->write_fde_, FDE_WRITE);
+            fdevent_add(handler->write_fde_, FDE_WRITE);
         }
         if (events & FDE_WRITE) {
             ASSERT_EQ(fd, handler->write_fd_);
@@ -59,7 +59,7 @@
             handler->queue_.pop();
             ASSERT_EQ(1, adb_write(fd, &c, 1));
             if (handler->queue_.empty()) {
-              fdevent_del(&handler->write_fde_, FDE_WRITE);
+                fdevent_del(handler->write_fde_, FDE_WRITE);
             }
         }
     }
@@ -67,8 +67,8 @@
   private:
     const int read_fd_;
     const int write_fd_;
-    fdevent read_fde_;
-    fdevent write_fde_;
+    fdevent* read_fde_;
+    fdevent* write_fde_;
     std::queue<char> queue_;
 };
 
@@ -80,30 +80,7 @@
 
 TEST_F(FdeventTest, fdevent_terminate) {
     PrepareThread();
-
-    std::thread thread(fdevent_loop);
-    TerminateThread(thread);
-}
-
-static void FdEventThreadFunc(ThreadArg* arg) {
-    std::vector<int> read_fds;
-    std::vector<int> write_fds;
-
-    read_fds.push_back(arg->first_read_fd);
-    for (size_t i = 0; i < arg->middle_pipe_count; ++i) {
-        int fds[2];
-        ASSERT_EQ(0, adb_socketpair(fds));
-        read_fds.push_back(fds[0]);
-        write_fds.push_back(fds[1]);
-    }
-    write_fds.push_back(arg->last_write_fd);
-
-    std::vector<std::unique_ptr<FdHandler>> fd_handlers;
-    for (size_t i = 0; i < read_fds.size(); ++i) {
-        fd_handlers.push_back(std::make_unique<FdHandler>(read_fds[i], write_fds[i]));
-    }
-
-    fdevent_loop();
+    TerminateThread();
 }
 
 TEST_F(FdeventTest, smoke) {
@@ -122,7 +99,26 @@
     int reader = fd_pair2[0];
 
     PrepareThread();
-    std::thread thread(FdEventThreadFunc, &thread_arg);
+
+    std::vector<std::unique_ptr<FdHandler>> fd_handlers;
+    fdevent_run_on_main_thread([&thread_arg, &fd_handlers]() {
+        std::vector<int> read_fds;
+        std::vector<int> write_fds;
+
+        read_fds.push_back(thread_arg.first_read_fd);
+        for (size_t i = 0; i < thread_arg.middle_pipe_count; ++i) {
+            int fds[2];
+            ASSERT_EQ(0, adb_socketpair(fds));
+            read_fds.push_back(fds[0]);
+            write_fds.push_back(fds[1]);
+        }
+        write_fds.push_back(thread_arg.last_write_fd);
+
+        for (size_t i = 0; i < read_fds.size(); ++i) {
+            fd_handlers.push_back(std::make_unique<FdHandler>(read_fds[i], write_fds[i]));
+        }
+    });
+    WaitForFdeventLoop();
 
     for (size_t i = 0; i < MESSAGE_LOOP_COUNT; ++i) {
         std::string read_buffer = MESSAGE;
@@ -132,21 +128,24 @@
         ASSERT_EQ(read_buffer, write_buffer);
     }
 
-    TerminateThread(thread);
+    fdevent_run_on_main_thread([&fd_handlers]() { fd_handlers.clear(); });
+    WaitForFdeventLoop();
+
+    TerminateThread();
     ASSERT_EQ(0, adb_close(writer));
     ASSERT_EQ(0, adb_close(reader));
 }
 
 struct InvalidFdArg {
-    fdevent fde;
+    fdevent* fde;
     unsigned expected_events;
     size_t* happened_event_count;
 };
 
-static void InvalidFdEventCallback(int fd, unsigned events, void* userdata) {
+static void InvalidFdEventCallback(int, unsigned events, void* userdata) {
     InvalidFdArg* arg = reinterpret_cast<InvalidFdArg*>(userdata);
     ASSERT_EQ(arg->expected_events, events);
-    fdevent_remove(&arg->fde);
+    fdevent_destroy(arg->fde);
     if (++*(arg->happened_event_count) == 2) {
         fdevent_terminate_loop();
     }
@@ -158,15 +157,15 @@
     InvalidFdArg read_arg;
     read_arg.expected_events = FDE_READ | FDE_ERROR;
     read_arg.happened_event_count = &happened_event_count;
-    fdevent_install(&read_arg.fde, INVALID_READ_FD, InvalidFdEventCallback, &read_arg);
-    fdevent_add(&read_arg.fde, FDE_READ);
+    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;
-    fdevent_install(&write_arg.fde, INVALID_WRITE_FD, InvalidFdEventCallback, &write_arg);
-    fdevent_add(&write_arg.fde, FDE_WRITE);
+    write_arg.fde = fdevent_create(INVALID_WRITE_FD, InvalidFdEventCallback, &write_arg);
+    fdevent_add(write_arg.fde, FDE_WRITE);
     fdevent_loop();
 }
 
@@ -179,7 +178,6 @@
     std::vector<int> vec;
 
     PrepareThread();
-    std::thread thread(fdevent_loop);
 
     // Block the main thread for a long time while we queue our callbacks.
     fdevent_run_on_main_thread([]() {
@@ -194,7 +192,7 @@
         });
     }
 
-    TerminateThread(thread);
+    TerminateThread();
 
     ASSERT_EQ(1000000u, vec.size());
     for (int i = 0; i < 1000000; ++i) {
@@ -218,11 +216,8 @@
     std::vector<int> vec;
 
     PrepareThread();
-    std::thread thread(fdevent_loop);
-
     fdevent_run_on_main_thread(make_appender(&vec, 0));
-
-    TerminateThread(thread);
+    TerminateThread();
 
     ASSERT_EQ(100u, vec.size());
     for (int i = 0; i < 100; ++i) {
diff --git a/adb/fdevent_test.h b/adb/fdevent_test.h
index 1a2d41c..5a417e0 100644
--- a/adb/fdevent_test.h
+++ b/adb/fdevent_test.h
@@ -16,10 +16,31 @@
 
 #include <gtest/gtest.h>
 
+#include <condition_variable>
+#include <mutex>
 #include <thread>
 
 #include "socket.h"
 #include "sysdeps.h"
+#include "sysdeps/chrono.h"
+
+static void WaitForFdeventLoop() {
+    // Sleep for a bit to make sure that network events have propagated.
+    std::this_thread::sleep_for(100ms);
+
+    // fdevent_run_on_main_thread has a guaranteed ordering, and is guaranteed to happen after
+    // socket events, so as soon as our function is called, we know that we've processed all
+    // previous events.
+    std::mutex mutex;
+    std::condition_variable cv;
+    std::unique_lock<std::mutex> lock(mutex);
+    fdevent_run_on_main_thread([&]() {
+        mutex.lock();
+        mutex.unlock();
+        cv.notify_one();
+    });
+    cv.wait(lock);
+}
 
 class FdeventTest : public ::testing::Test {
   protected:
@@ -49,6 +70,9 @@
         }
         dummy_socket->ready(dummy_socket);
         dummy = dummy_fds[0];
+
+        thread_ = std::thread([]() { fdevent_loop(); });
+        WaitForFdeventLoop();
     }
 
     size_t GetAdditionalLocalSocketCount() {
@@ -56,10 +80,12 @@
         return 2;
     }
 
-    void TerminateThread(std::thread& thread) {
+    void TerminateThread() {
         fdevent_terminate_loop();
         ASSERT_TRUE(WriteFdExactly(dummy, "", 1));
-        thread.join();
+        thread_.join();
         ASSERT_EQ(0, adb_close(dummy));
     }
+
+    std::thread thread_;
 };
diff --git a/adb/protocol.txt b/adb/protocol.txt
index 55ea87f..f4523c4 100644
--- a/adb/protocol.txt
+++ b/adb/protocol.txt
@@ -183,9 +183,11 @@
 
 Command constant: A_SYNC
 
-The SYNC message is used by the io pump to make sure that stale
+*** obsolete, no longer used ***
+
+The SYNC message was used by the io pump to make sure that stale
 outbound messages are discarded when the connection to the remote side
-is broken.  It is only used internally to the bridge and never valid
+is broken.  It was only used internally to the bridge and never valid
 to send across the wire.
 
 * when the connection to the remote side goes offline, the io pump
diff --git a/adb/range.h b/adb/range.h
deleted file mode 100644
index 7a0b822..0000000
--- a/adb/range.h
+++ /dev/null
@@ -1,65 +0,0 @@
-#pragma once
-
-/*
- * 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 <string>
-
-#include <android-base/logging.h>
-
-struct Range {
-    explicit Range(std::string data) : data_(std::move(data)) {}
-
-    Range(const Range& copy) = delete;
-    Range& operator=(const Range& copy) = delete;
-
-    Range(Range&& move) = default;
-    Range& operator=(Range&& move) = default;
-
-    bool empty() const {
-        return size() == 0;
-    }
-
-    size_t size() const {
-        return data_.size() - begin_offset_ - end_offset_;
-    };
-
-    void drop_front(size_t n) {
-        CHECK_GE(size(), n);
-        begin_offset_ += n;
-    }
-
-    void drop_end(size_t n) {
-        CHECK_GE(size(), n);
-        end_offset_ += n;
-    }
-
-    char* data() {
-        return &data_[0] + begin_offset_;
-    }
-
-    std::string::iterator begin() {
-        return data_.begin() + begin_offset_;
-    }
-
-    std::string::iterator end() {
-        return data_.end() - end_offset_;
-    }
-
-    std::string data_;
-    size_t begin_offset_ = 0;
-    size_t end_offset_ = 0;
-};
diff --git a/adb/remount_service.cpp b/adb/remount_service.cpp
deleted file mode 100644
index d679a6d..0000000
--- a/adb/remount_service.cpp
+++ /dev/null
@@ -1,156 +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.
- */
-
-#define TRACE_TAG ADB
-
-#include "sysdeps.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <mntent.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mount.h>
-#include <unistd.h>
-
-#include <string>
-
-#include <android-base/properties.h>
-
-#include "adb.h"
-#include "adb_io.h"
-#include "adb_utils.h"
-#include "fs_mgr.h"
-
-// Returns the device used to mount a directory in /proc/mounts.
-static std::string find_proc_mount(const char* dir) {
-    std::unique_ptr<FILE, int(*)(FILE*)> fp(setmntent("/proc/mounts", "r"), endmntent);
-    if (!fp) {
-        return "";
-    }
-
-    mntent* e;
-    while ((e = getmntent(fp.get())) != nullptr) {
-        if (strcmp(dir, e->mnt_dir) == 0) {
-            return e->mnt_fsname;
-        }
-    }
-    return "";
-}
-
-// Returns the device used to mount a directory in the fstab.
-static std::string find_fstab_mount(const char* dir) {
-    std::unique_ptr<fstab, decltype(&fs_mgr_free_fstab)> fstab(fs_mgr_read_fstab_default(),
-                                                               fs_mgr_free_fstab);
-    struct fstab_rec* rec = fs_mgr_get_entry_for_mount_point(fstab.get(), dir);
-    return rec ? rec->blk_device : "";
-}
-
-// The proc entry for / is full of lies, so check fstab instead.
-// /proc/mounts lists rootfs and /dev/root, neither of which is what we want.
-static std::string find_mount(const char* dir, bool is_root) {
-    if (is_root) {
-        return find_fstab_mount(dir);
-    } else {
-       return find_proc_mount(dir);
-    }
-}
-
-bool make_block_device_writable(const std::string& dev) {
-    int fd = unix_open(dev.c_str(), O_RDONLY | O_CLOEXEC);
-    if (fd == -1) {
-        return false;
-    }
-
-    int OFF = 0;
-    bool result = (ioctl(fd, BLKROSET, &OFF) != -1);
-    unix_close(fd);
-    return result;
-}
-
-static bool remount_partition(int fd, const char* dir) {
-    if (!directory_exists(dir)) {
-        return true;
-    }
-    bool is_root = strcmp(dir, "/") == 0;
-    std::string dev = find_mount(dir, is_root);
-    // Even if the device for the root is not found, we still try to remount it
-    // as rw. This typically only happens when running Android in a container:
-    // the root will almost always be in a loop device, which is dynamic, so
-    // it's not convenient to put in the fstab.
-    if (dev.empty() && !is_root) {
-        return true;
-    }
-    if (!dev.empty() && !make_block_device_writable(dev)) {
-        WriteFdFmt(fd, "remount of %s failed; couldn't make block device %s writable: %s\n",
-                   dir, dev.c_str(), strerror(errno));
-        return false;
-    }
-    if (mount(dev.c_str(), dir, "none", MS_REMOUNT | MS_BIND, nullptr) == -1) {
-        // This is useful for cases where the superblock is already marked as
-        // read-write, but the mount itself is read-only, such as containers
-        // where the remount with just MS_REMOUNT is forbidden by the kernel.
-        WriteFdFmt(fd, "remount of the %s mount failed: %s.\n", dir, strerror(errno));
-        return false;
-    }
-    if (mount(dev.c_str(), dir, "none", MS_REMOUNT, nullptr) == -1) {
-        WriteFdFmt(fd, "remount of the %s superblock failed: %s\n", dir, strerror(errno));
-        return false;
-    }
-    return true;
-}
-
-void remount_service(int fd, void* cookie) {
-    if (getuid() != 0) {
-        WriteFdExactly(fd, "Not running as root. Try \"adb root\" first.\n");
-        adb_close(fd);
-        return;
-    }
-
-    bool system_verified = !(android::base::GetProperty("partition.system.verified", "").empty());
-    bool vendor_verified = !(android::base::GetProperty("partition.vendor.verified", "").empty());
-
-    if (system_verified || vendor_verified) {
-        // Allow remount but warn of likely bad effects
-        bool both = system_verified && vendor_verified;
-        WriteFdFmt(fd,
-                   "dm_verity is enabled on the %s%s%s partition%s.\n",
-                   system_verified ? "system" : "",
-                   both ? " and " : "",
-                   vendor_verified ? "vendor" : "",
-                   both ? "s" : "");
-        WriteFdExactly(fd,
-                       "Use \"adb disable-verity\" to disable verity.\n"
-                       "If you do not, remount may succeed, however, you will still "
-                       "not be able to write to these volumes.\n");
-    }
-
-    bool success = true;
-    if (android::base::GetBoolProperty("ro.build.system_root_image", false)) {
-        success &= remount_partition(fd, "/");
-    } else {
-        success &= remount_partition(fd, "/system");
-    }
-    success &= remount_partition(fd, "/odm");
-    success &= remount_partition(fd, "/oem");
-    success &= remount_partition(fd, "/product");
-    success &= remount_partition(fd, "/vendor");
-
-    WriteFdExactly(fd, success ? "remount succeeded\n" : "remount failed\n");
-
-    adb_close(fd);
-}
diff --git a/adb/services.cpp b/adb/services.cpp
index 0b0c161..a757d90 100644
--- a/adb/services.cpp
+++ b/adb/services.cpp
@@ -291,7 +291,9 @@
     } else if(!strncmp(name, "sync:", 5)) {
         ret = create_service_thread("sync", file_sync_service, nullptr);
     } else if(!strncmp(name, "remount:", 8)) {
-        ret = create_service_thread("remount", remount_service, nullptr);
+        const char* options = name + strlen("remount:");
+        void* cookie = const_cast<void*>(reinterpret_cast<const void*>(options));
+        ret = create_service_thread("remount", remount_service, cookie);
     } else if(!strncmp(name, "reboot:", 7)) {
         void* arg = strdup(name + 7);
         if (arg == NULL) return -1;
diff --git a/adb/socket.h b/adb/socket.h
index 88499b5..0905aab 100644
--- a/adb/socket.h
+++ b/adb/socket.h
@@ -24,9 +24,8 @@
 #include <string>
 
 #include "fdevent.h"
-#include "range.h"
+#include "types.h"
 
-struct apacket;
 class atransport;
 
 /* An asocket represents one half of a connection between a local and
@@ -59,11 +58,11 @@
      * us to our fd event system.  For remote asockets
      * these fields are not used.
      */
-    fdevent fde = {};
-    int fd = 0;
+    fdevent* fde = nullptr;
+    int fd = -1;
 
     // queue of data waiting to be written
-    std::deque<Range> packet_queue;
+    IOVector packet_queue;
 
     std::string smart_socket_data;
 
@@ -73,7 +72,7 @@
      * peer->ready() when we once again are ready to
      * receive data.
      */
-    int (*enqueue)(asocket* s, std::string data) = nullptr;
+    int (*enqueue)(asocket* s, apacket::payload_type data) = nullptr;
 
     /* ready is called by the peer when it is ready for
      * us to send data via enqueue again
diff --git a/adb/socket_test.cpp b/adb/socket_test.cpp
index 6b40056..04214a2 100644
--- a/adb/socket_test.cpp
+++ b/adb/socket_test.cpp
@@ -42,8 +42,6 @@
 
 class LocalSocketTest : public FdeventTest {};
 
-constexpr auto SLEEP_FOR_FDEVENT = 100ms;
-
 TEST_F(LocalSocketTest, smoke) {
     // Join two socketpairs with a chain of intermediate socketpairs.
     int first[2];
@@ -84,7 +82,6 @@
     connect(prev_tail, end);
 
     PrepareThread();
-    std::thread thread(fdevent_loop);
 
     for (size_t i = 0; i < MESSAGE_LOOP_COUNT; ++i) {
         std::string read_buffer = MESSAGE;
@@ -98,9 +95,9 @@
     ASSERT_EQ(0, adb_close(last[1]));
 
     // Wait until the local sockets are closed.
-    std::this_thread::sleep_for(SLEEP_FOR_FDEVENT);
+    WaitForFdeventLoop();
     ASSERT_EQ(GetAdditionalLocalSocketCount(), fdevent_installed_count());
-    TerminateThread(thread);
+    TerminateThread();
 }
 
 struct CloseWithPacketArg {
@@ -109,24 +106,39 @@
     int cause_close_fd;
 };
 
-static void CloseWithPacketThreadFunc(CloseWithPacketArg* arg) {
-    asocket* s = create_local_socket(arg->socket_fd);
-    ASSERT_TRUE(s != nullptr);
-    arg->bytes_written = 0;
+static void CreateCloser(CloseWithPacketArg* arg) {
+    fdevent_run_on_main_thread([arg]() {
+        asocket* s = create_local_socket(arg->socket_fd);
+        ASSERT_TRUE(s != nullptr);
+        arg->bytes_written = 0;
 
-    std::string data;
-    data.resize(MAX_PAYLOAD);
-    arg->bytes_written += data.size();
-    int ret = s->enqueue(s, std::move(data));
-    ASSERT_EQ(1, ret);
+        // On platforms that implement sockets via underlying sockets (e.g. Wine),
+        // a socket can appear to be full, and then become available for writes
+        // again without read being called on the other end. Loop and sleep after
+        // each write to give the underlying implementation time to flush.
+        bool socket_filled = false;
+        for (int i = 0; i < 128; ++i) {
+            apacket::payload_type data;
+            data.resize(MAX_PAYLOAD);
+            arg->bytes_written += data.size();
+            int ret = s->enqueue(s, std::move(data));
+            if (ret == 1) {
+                socket_filled = true;
+                break;
+            }
+            ASSERT_NE(-1, ret);
 
-    asocket* cause_close_s = create_local_socket(arg->cause_close_fd);
-    ASSERT_TRUE(cause_close_s != nullptr);
-    cause_close_s->peer = s;
-    s->peer = cause_close_s;
-    cause_close_s->ready(cause_close_s);
+            std::this_thread::sleep_for(250ms);
+        }
+        ASSERT_TRUE(socket_filled);
 
-    fdevent_loop();
+        asocket* cause_close_s = create_local_socket(arg->cause_close_fd);
+        ASSERT_TRUE(cause_close_s != nullptr);
+        cause_close_s->peer = s;
+        s->peer = cause_close_s;
+        cause_close_s->ready(cause_close_s);
+    });
+    WaitForFdeventLoop();
 }
 
 // This test checks if we can close local socket in the following situation:
@@ -143,16 +155,17 @@
     arg.cause_close_fd = cause_close_fd[1];
 
     PrepareThread();
-    std::thread thread(CloseWithPacketThreadFunc, &arg);
-    // Wait until the fdevent_loop() starts.
-    std::this_thread::sleep_for(SLEEP_FOR_FDEVENT);
+    CreateCloser(&arg);
+
     ASSERT_EQ(0, adb_close(cause_close_fd[0]));
-    std::this_thread::sleep_for(SLEEP_FOR_FDEVENT);
+
+    WaitForFdeventLoop();
     EXPECT_EQ(1u + GetAdditionalLocalSocketCount(), fdevent_installed_count());
     ASSERT_EQ(0, adb_close(socket_fd[0]));
-    std::this_thread::sleep_for(SLEEP_FOR_FDEVENT);
+
+    WaitForFdeventLoop();
     ASSERT_EQ(GetAdditionalLocalSocketCount(), fdevent_installed_count());
-    TerminateThread(thread);
+    TerminateThread();
 }
 
 // This test checks if we can read packets from a closing local socket.
@@ -166,11 +179,12 @@
     arg.cause_close_fd = cause_close_fd[1];
 
     PrepareThread();
-    std::thread thread(CloseWithPacketThreadFunc, &arg);
-    // Wait until the fdevent_loop() starts.
-    std::this_thread::sleep_for(SLEEP_FOR_FDEVENT);
+    CreateCloser(&arg);
+
+    WaitForFdeventLoop();
     ASSERT_EQ(0, adb_close(cause_close_fd[0]));
-    std::this_thread::sleep_for(SLEEP_FOR_FDEVENT);
+
+    WaitForFdeventLoop();
     EXPECT_EQ(1u + GetAdditionalLocalSocketCount(), fdevent_installed_count());
 
     // Verify if we can read successfully.
@@ -179,9 +193,9 @@
     ASSERT_EQ(true, ReadFdExactly(socket_fd[0], buf.data(), buf.size()));
     ASSERT_EQ(0, adb_close(socket_fd[0]));
 
-    std::this_thread::sleep_for(SLEEP_FOR_FDEVENT);
+    WaitForFdeventLoop();
     ASSERT_EQ(GetAdditionalLocalSocketCount(), fdevent_installed_count());
-    TerminateThread(thread);
+    TerminateThread();
 }
 
 // This test checks if we can close local socket in the following situation:
@@ -198,15 +212,15 @@
     arg.cause_close_fd = cause_close_fd[1];
 
     PrepareThread();
-    std::thread thread(CloseWithPacketThreadFunc, &arg);
-    // Wait until the fdevent_loop() starts.
-    std::this_thread::sleep_for(SLEEP_FOR_FDEVENT);
+    CreateCloser(&arg);
+
+    WaitForFdeventLoop();
     EXPECT_EQ(2u + GetAdditionalLocalSocketCount(), fdevent_installed_count());
     ASSERT_EQ(0, adb_close(socket_fd[0]));
 
-    std::this_thread::sleep_for(SLEEP_FOR_FDEVENT);
+    WaitForFdeventLoop();
     ASSERT_EQ(GetAdditionalLocalSocketCount(), fdevent_installed_count());
-    TerminateThread(thread);
+    TerminateThread();
 }
 
 // Ensure that if we fail to write output to an fd, we will still flush data coming from it.
@@ -226,7 +240,6 @@
     tail->ready(tail);
 
     PrepareThread();
-    std::thread thread(fdevent_loop);
 
     EXPECT_TRUE(WriteFdExactly(head_fd[0], "foo", 3));
 
@@ -242,10 +255,9 @@
     adb_close(head_fd[0]);
     adb_close(tail_fd[0]);
 
-    // Wait until the local sockets are closed.
-    std::this_thread::sleep_for(SLEEP_FOR_FDEVENT);
+    WaitForFdeventLoop();
     ASSERT_EQ(GetAdditionalLocalSocketCount(), fdevent_installed_count());
-    TerminateThread(thread);
+    TerminateThread();
 }
 
 #if defined(__linux__)
@@ -254,21 +266,10 @@
     std::string error;
     int fd = network_loopback_client(5038, SOCK_STREAM, &error);
     ASSERT_GE(fd, 0) << error;
-    std::this_thread::sleep_for(200ms);
+    std::this_thread::sleep_for(1s);
     ASSERT_EQ(0, adb_close(fd));
 }
 
-struct CloseRdHupSocketArg {
-    int socket_fd;
-};
-
-static void CloseRdHupSocketThreadFunc(CloseRdHupSocketArg* arg) {
-    asocket* s = create_local_socket(arg->socket_fd);
-    ASSERT_TRUE(s != nullptr);
-
-    fdevent_loop();
-}
-
 // This test checks if we can close sockets in CLOSE_WAIT state.
 TEST_F(LocalSocketTest, close_socket_in_CLOSE_WAIT_state) {
     std::string error;
@@ -279,22 +280,23 @@
 
     int accept_fd = adb_socket_accept(listen_fd, nullptr, nullptr);
     ASSERT_GE(accept_fd, 0);
-    CloseRdHupSocketArg arg;
-    arg.socket_fd = accept_fd;
 
     PrepareThread();
-    std::thread thread(CloseRdHupSocketThreadFunc, &arg);
 
-    // Wait until the fdevent_loop() starts.
-    std::this_thread::sleep_for(SLEEP_FOR_FDEVENT);
+    fdevent_run_on_main_thread([accept_fd]() {
+        asocket* s = create_local_socket(accept_fd);
+        ASSERT_TRUE(s != nullptr);
+    });
+
+    WaitForFdeventLoop();
     EXPECT_EQ(1u + GetAdditionalLocalSocketCount(), fdevent_installed_count());
 
     // Wait until the client closes its socket.
     client_thread.join();
 
-    std::this_thread::sleep_for(SLEEP_FOR_FDEVENT);
+    WaitForFdeventLoop();
     ASSERT_EQ(GetAdditionalLocalSocketCount(), fdevent_installed_count());
-    TerminateThread(thread);
+    TerminateThread();
 }
 
 #endif  // defined(__linux__)
diff --git a/adb/sockets.cpp b/adb/sockets.cpp
index 04bd080..de3215d 100644
--- a/adb/sockets.cpp
+++ b/adb/sockets.cpp
@@ -37,8 +37,8 @@
 
 #include "adb.h"
 #include "adb_io.h"
-#include "range.h"
 #include "transport.h"
+#include "types.h"
 
 static std::recursive_mutex& local_socket_list_lock = *new std::recursive_mutex();
 static unsigned local_socket_next_id = 1;
@@ -113,25 +113,24 @@
 };
 
 static SocketFlushResult local_socket_flush_incoming(asocket* s) {
-    while (!s->packet_queue.empty()) {
-        Range& r = s->packet_queue.front();
-
-        int rc = adb_write(s->fd, r.data(), r.size());
-        if (rc == static_cast<int>(r.size())) {
-            s->packet_queue.pop_front();
+    if (!s->packet_queue.empty()) {
+        std::vector<adb_iovec> iov = s->packet_queue.iovecs();
+        ssize_t rc = adb_writev(s->fd, iov.data(), iov.size());
+        if (rc > 0 && static_cast<size_t>(rc) == s->packet_queue.size()) {
+            s->packet_queue.clear();
         } else if (rc > 0) {
-            r.drop_front(rc);
-            fdevent_add(&s->fde, FDE_WRITE);
+            // TODO: Implement a faster drop_front?
+            s->packet_queue.take_front(rc);
+            fdevent_add(s->fde, FDE_WRITE);
             return SocketFlushResult::TryAgain;
         } else if (rc == -1 && errno == EAGAIN) {
-            fdevent_add(&s->fde, FDE_WRITE);
+            fdevent_add(s->fde, FDE_WRITE);
             return SocketFlushResult::TryAgain;
+        } else {
+            // We failed to write, but it's possible that we can still read from the socket.
+            // Give that a try before giving up.
+            s->has_write_error = true;
         }
-
-        // We failed to write, but it's possible that we can still read from the socket.
-        // Give that a try before giving up.
-        s->has_write_error = true;
-        break;
     }
 
     // If we sent the last packet of a closing socket, we can now destroy it.
@@ -140,14 +139,14 @@
         return SocketFlushResult::Destroyed;
     }
 
-    fdevent_del(&s->fde, FDE_WRITE);
+    fdevent_del(s->fde, FDE_WRITE);
     return SocketFlushResult::Completed;
 }
 
 // Returns false if the socket has been closed and destroyed as a side-effect of this function.
 static bool local_socket_flush_outgoing(asocket* s) {
     const size_t max_payload = s->get_max_payload();
-    std::string data;
+    apacket::payload_type data;
     data.resize(max_payload);
     char* x = &data[0];
     size_t avail = max_payload;
@@ -173,7 +172,7 @@
         break;
     }
     D("LS(%d): fd=%d post avail loop. r=%d is_eof=%d forced_eof=%d", s->id, s->fd, r, is_eof,
-      s->fde.force_eof);
+      s->fde->force_eof);
 
     if (avail != max_payload && s->peer) {
         data.resize(max_payload - avail);
@@ -200,13 +199,13 @@
             ** we disable notification of READs.  They'll
             ** be enabled again when we get a call to ready()
             */
-            fdevent_del(&s->fde, FDE_READ);
+            fdevent_del(s->fde, FDE_READ);
         }
     }
 
     // Don't allow a forced eof if data is still there.
-    if ((s->fde.force_eof && !r) || is_eof) {
-        D(" closing because is_eof=%d r=%d s->fde.force_eof=%d", is_eof, r, s->fde.force_eof);
+    if ((s->fde->force_eof && !r) || is_eof) {
+        D(" closing because is_eof=%d r=%d s->fde.force_eof=%d", is_eof, r, s->fde->force_eof);
         s->close(s);
         return false;
     }
@@ -214,11 +213,10 @@
     return true;
 }
 
-static int local_socket_enqueue(asocket* s, std::string data) {
+static int local_socket_enqueue(asocket* s, apacket::payload_type data) {
     D("LS(%d): enqueue %zu", s->id, data.size());
 
-    Range r(std::move(data));
-    s->packet_queue.push_back(std::move(r));
+    s->packet_queue.append(std::move(data));
     switch (local_socket_flush_incoming(s)) {
         case SocketFlushResult::Destroyed:
             return -1;
@@ -236,19 +234,19 @@
 static void local_socket_ready(asocket* s) {
     /* far side is ready for data, pay attention to
        readable events */
-    fdevent_add(&s->fde, FDE_READ);
+    fdevent_add(s->fde, FDE_READ);
 }
 
 // be sure to hold the socket list lock when calling this
 static void local_socket_destroy(asocket* s) {
     int exit_on_close = s->exit_on_close;
 
-    D("LS(%d): destroying fde.fd=%d", s->id, s->fde.fd);
+    D("LS(%d): destroying fde.fd=%d", s->id, s->fd);
 
     /* IMPORTANT: the remove closes the fd
     ** that belongs to this socket
     */
-    fdevent_remove(&s->fde);
+    fdevent_destroy(s->fde);
 
     remove_socket(s);
     delete s;
@@ -290,11 +288,11 @@
     */
     D("LS(%d): closing", s->id);
     s->closing = 1;
-    fdevent_del(&s->fde, FDE_READ);
+    fdevent_del(s->fde, FDE_READ);
     remove_socket(s);
     D("LS(%d): put on socket_closing_list fd=%d", s->id, s->fd);
     local_socket_closing_list.push_back(s);
-    CHECK_EQ(FDE_WRITE, s->fde.state & FDE_WRITE);
+    CHECK_EQ(FDE_WRITE, s->fde->state & FDE_WRITE);
 }
 
 static void local_socket_event_func(int fd, unsigned ev, void* _s) {
@@ -343,7 +341,7 @@
     s->close = local_socket_close;
     install_local_socket(s);
 
-    fdevent_install(&s->fde, fd, local_socket_event_func, s);
+    s->fde = fdevent_create(fd, local_socket_event_func, s);
     D("LS(%d): created (fd=%d)", s->id, s->fd);
     return s;
 }
@@ -394,7 +392,7 @@
 }
 #endif /* ADB_HOST */
 
-static int remote_socket_enqueue(asocket* s, std::string data) {
+static int remote_socket_enqueue(asocket* s, apacket::payload_type data) {
     D("entered remote_socket_enqueue RS(%d) WRITE fd=%d peer.fd=%d", s->id, s->fd, s->peer->fd);
     apacket* p = get_apacket();
 
@@ -476,8 +474,7 @@
     p->msg.arg0 = s->id;
 
     // adbd expects a null-terminated string.
-    p->payload = destination;
-    p->payload.push_back('\0');
+    p->payload.assign(destination, destination + strlen(destination) + 1);
     p->msg.data_length = p->payload.size();
 
     if (p->msg.data_length > s->get_max_payload()) {
@@ -612,7 +609,7 @@
 
 #endif  // ADB_HOST
 
-static int smart_socket_enqueue(asocket* s, std::string data) {
+static int smart_socket_enqueue(asocket* s, apacket::payload_type data) {
 #if ADB_HOST
     char* service = nullptr;
     char* serial = nullptr;
@@ -623,7 +620,8 @@
     D("SS(%d): enqueue %zu", s->id, data.size());
 
     if (s->smart_socket_data.empty()) {
-        s->smart_socket_data = std::move(data);
+        // TODO: Make this an IOVector?
+        s->smart_socket_data.assign(data.begin(), data.end());
     } else {
         std::copy(data.begin(), data.end(), std::back_inserter(s->smart_socket_data));
     }
@@ -750,7 +748,7 @@
     if (!s->transport) {
         SendFail(s->peer->fd, "device offline (no transport)");
         goto fail;
-    } else if (s->transport->GetConnectionState() == kCsOffline) {
+    } else if (!ConnectionStateIsOnline(s->transport->GetConnectionState())) {
         /* if there's no remote we fail the connection
          ** right here and terminate it
          */
diff --git a/adb/sysdeps.h b/adb/sysdeps.h
index edeacc1..3be99f6 100644
--- a/adb/sysdeps.h
+++ b/adb/sysdeps.h
@@ -92,11 +92,6 @@
     return 0;
 }
 
-static __inline__  unsigned long adb_thread_id()
-{
-    return GetCurrentThreadId();
-}
-
 static __inline__ void  close_on_exec(int  fd)
 {
     /* nothing really */
@@ -621,11 +616,6 @@
     return path[0] == '/';
 }
 
-static __inline__ unsigned long adb_thread_id()
-{
-    return (unsigned long)gettid();
-}
-
 #endif /* !_WIN32 */
 
 static inline void disable_tcp_nagle(int fd) {
diff --git a/adb/sysdeps/uio.h b/adb/sysdeps/uio.h
new file mode 100644
index 0000000..d06ef89
--- /dev/null
+++ b/adb/sysdeps/uio.h
@@ -0,0 +1,39 @@
+/*
+ * 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>
+
+#if defined(_WIN32)
+
+// Layout of this struct must match struct WSABUF (verified via static assert in sysdeps_win32.cpp)
+struct adb_iovec {
+    size_t iov_len;
+    void* iov_base;
+};
+
+ssize_t adb_writev(int fd, const adb_iovec* iov, int iovcnt);
+
+#else
+
+#include <sys/uio.h>
+using adb_iovec = struct iovec;
+#define adb_writev writev
+
+#endif
+
+#pragma GCC poison writev
diff --git a/adb/sysdeps_test.cpp b/adb/sysdeps_test.cpp
index fd19882..79cebe6 100644
--- a/adb/sysdeps_test.cpp
+++ b/adb/sysdeps_test.cpp
@@ -121,10 +121,13 @@
     adb_pollfd pfd[3] = {};
     pfd[0].fd = fds[0];
     pfd[0].events = POLLRDNORM;
+    pfd[0].revents = ~0;
     pfd[1].fd = INT_MAX;
     pfd[1].events = POLLRDNORM;
+    pfd[1].revents = ~0;
     pfd[2].fd = fds[1];
     pfd[2].events = POLLWRNORM;
+    pfd[2].revents = ~0;
 
     ASSERT_TRUE(WriteFdExactly(fds[1], "foo", 4));
 
@@ -136,6 +139,17 @@
     EXPECT_EQ(POLLRDNORM, pfd[0].revents);
     EXPECT_EQ(POLLNVAL, pfd[1].revents);
     EXPECT_EQ(POLLWRNORM, pfd[2].revents);
+
+    // Make sure that we return immediately if an invalid FD is given.
+    pfd[0].fd = fds[0];
+    pfd[0].events = POLLRDNORM;
+    pfd[0].revents = ~0;
+    pfd[1].fd = INT_MAX;
+    pfd[1].events = POLLRDNORM;
+    pfd[1].revents = ~0;
+    EXPECT_EQ(2, adb_poll(pfd, 2, -1));
+    EXPECT_EQ(POLLRDNORM, pfd[0].revents);
+    EXPECT_EQ(POLLNVAL, pfd[1].revents);
 }
 
 TEST_F(sysdeps_poll, duplicate_fd) {
diff --git a/adb/sysdeps_win32.cpp b/adb/sysdeps_win32.cpp
index 62f4ac8..bfac342 100644
--- a/adb/sysdeps_win32.cpp
+++ b/adb/sysdeps_win32.cpp
@@ -36,6 +36,7 @@
 
 #include <android-base/errors.h>
 #include <android-base/logging.h>
+#include <android-base/macros.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <android-base/utf8.h>
@@ -43,6 +44,8 @@
 #include "adb.h"
 #include "adb_utils.h"
 
+#include "sysdeps/uio.h"
+
 extern void fatal(const char *fmt, ...);
 
 /* forward declarations */
@@ -57,6 +60,7 @@
     int (*_fh_lseek)(FH, int, int);
     int (*_fh_read)(FH, void*, int);
     int (*_fh_write)(FH, const void*, int);
+    int (*_fh_writev)(FH, const adb_iovec*, int);
 } FHClassRec;
 
 static void _fh_file_init(FH);
@@ -64,6 +68,7 @@
 static int _fh_file_lseek(FH, int, int);
 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 const FHClassRec _fh_file_class = {
     _fh_file_init,
@@ -71,6 +76,7 @@
     _fh_file_lseek,
     _fh_file_read,
     _fh_file_write,
+    _fh_file_writev,
 };
 
 static void _fh_socket_init(FH);
@@ -78,6 +84,7 @@
 static int _fh_socket_lseek(FH, int, int);
 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 const FHClassRec _fh_socket_class = {
     _fh_socket_init,
@@ -85,6 +92,7 @@
     _fh_socket_lseek,
     _fh_socket_read,
     _fh_socket_write,
+    _fh_socket_writev,
 };
 
 #define assert(cond)                                                                       \
@@ -248,57 +256,88 @@
 /**************************************************************************/
 /**************************************************************************/
 
-static void _fh_file_init( FH  f ) {
+static void _fh_file_init(FH f) {
     f->fh_handle = INVALID_HANDLE_VALUE;
 }
 
-static int _fh_file_close( FH  f ) {
-    CloseHandle( f->fh_handle );
+static int _fh_file_close(FH f) {
+    CloseHandle(f->fh_handle);
     f->fh_handle = INVALID_HANDLE_VALUE;
     return 0;
 }
 
-static int _fh_file_read( FH  f,  void*  buf, int   len ) {
-    DWORD  read_bytes;
+static int _fh_file_read(FH f, void* buf, int len) {
+    DWORD read_bytes;
 
-    if ( !ReadFile( f->fh_handle, buf, (DWORD)len, &read_bytes, NULL ) ) {
-        D( "adb_read: could not read %d bytes from %s", len, f->name );
+    if (!ReadFile(f->fh_handle, buf, (DWORD)len, &read_bytes, NULL)) {
+        D("adb_read: could not read %d bytes from %s", len, f->name);
         errno = EIO;
         return -1;
     } else if (read_bytes < (DWORD)len) {
         f->eof = 1;
     }
-    return (int)read_bytes;
+    return read_bytes;
 }
 
-static int _fh_file_write( FH  f,  const void*  buf, int   len ) {
-    DWORD  wrote_bytes;
+static int _fh_file_write(FH f, const void* buf, int len) {
+    DWORD wrote_bytes;
 
-    if ( !WriteFile( f->fh_handle, buf, (DWORD)len, &wrote_bytes, NULL ) ) {
-        D( "adb_file_write: could not write %d bytes from %s", len, f->name );
+    if (!WriteFile(f->fh_handle, buf, (DWORD)len, &wrote_bytes, NULL)) {
+        D("adb_file_write: could not write %d bytes from %s", len, f->name);
         errno = EIO;
         return -1;
     } else if (wrote_bytes < (DWORD)len) {
         f->eof = 1;
     }
-    return  (int)wrote_bytes;
+    return wrote_bytes;
 }
 
-static int _fh_file_lseek( FH  f, int  pos, int  origin ) {
-    DWORD  method;
-    DWORD  result;
+static int _fh_file_writev(FH f, const adb_iovec* iov, int iovcnt) {
+    if (iovcnt <= 0) {
+        errno = EINVAL;
+        return -1;
+    }
 
-    switch (origin)
-    {
-        case SEEK_SET:  method = FILE_BEGIN; break;
-        case SEEK_CUR:  method = FILE_CURRENT; break;
-        case SEEK_END:  method = FILE_END; break;
+    DWORD wrote_bytes = 0;
+
+    for (int i = 0; i < iovcnt; ++i) {
+        ssize_t rc = _fh_file_write(f, iov[i].iov_base, iov[i].iov_len);
+        if (rc == -1) {
+            return wrote_bytes > 0 ? wrote_bytes : -1;
+        } else if (rc == 0) {
+            return wrote_bytes;
+        }
+
+        wrote_bytes += rc;
+
+        if (static_cast<size_t>(rc) < iov[i].iov_len) {
+            return wrote_bytes;
+        }
+    }
+
+    return wrote_bytes;
+}
+
+static int _fh_file_lseek(FH f, int pos, int origin) {
+    DWORD method;
+    DWORD result;
+
+    switch (origin) {
+        case SEEK_SET:
+            method = FILE_BEGIN;
+            break;
+        case SEEK_CUR:
+            method = FILE_CURRENT;
+            break;
+        case SEEK_END:
+            method = FILE_END;
+            break;
         default:
             errno = EINVAL;
             return -1;
     }
 
-    result = SetFilePointer( f->fh_handle, pos, NULL, method );
+    result = SetFilePointer(f->fh_handle, pos, NULL, method);
     if (result == INVALID_SET_FILE_POINTER) {
         errno = EIO;
         return -1;
@@ -308,7 +347,6 @@
     return (int)result;
 }
 
-
 /**************************************************************************/
 /**************************************************************************/
 /*****                                                                *****/
@@ -317,12 +355,11 @@
 /**************************************************************************/
 /**************************************************************************/
 
-int  adb_open(const char*  path, int  options)
-{
-    FH  f;
+int adb_open(const char* path, int options) {
+    FH f;
 
-    DWORD  desiredAccess       = 0;
-    DWORD  shareMode           = FILE_SHARE_READ | FILE_SHARE_WRITE;
+    DWORD desiredAccess = 0;
+    DWORD shareMode = FILE_SHARE_READ | FILE_SHARE_WRITE;
 
     switch (options) {
         case O_RDONLY:
@@ -340,8 +377,8 @@
             return -1;
     }
 
-    f = _fh_alloc( &_fh_file_class );
-    if ( !f ) {
+    f = _fh_alloc(&_fh_file_class);
+    if (!f) {
         return -1;
     }
 
@@ -349,21 +386,21 @@
     if (!android::base::UTF8ToWide(path, &path_wide)) {
         return -1;
     }
-    f->fh_handle = CreateFileW( path_wide.c_str(), desiredAccess, shareMode,
-                                NULL, OPEN_EXISTING, 0, NULL );
+    f->fh_handle =
+        CreateFileW(path_wide.c_str(), desiredAccess, shareMode, NULL, OPEN_EXISTING, 0, NULL);
 
-    if ( f->fh_handle == INVALID_HANDLE_VALUE ) {
+    if (f->fh_handle == INVALID_HANDLE_VALUE) {
         const DWORD err = GetLastError();
         _fh_close(f);
-        D( "adb_open: could not open '%s': ", path );
+        D("adb_open: could not open '%s': ", path);
         switch (err) {
             case ERROR_FILE_NOT_FOUND:
-                D( "file not found" );
+                D("file not found");
                 errno = ENOENT;
                 return -1;
 
             case ERROR_PATH_NOT_FOUND:
-                D( "path not found" );
+                D("path not found");
                 errno = ENOTDIR;
                 return -1;
 
@@ -374,18 +411,17 @@
         }
     }
 
-    snprintf( f->name, sizeof(f->name), "%d(%s)", _fh_to_int(f), path );
-    D( "adb_open: '%s' => fd %d", path, _fh_to_int(f) );
+    snprintf(f->name, sizeof(f->name), "%d(%s)", _fh_to_int(f), path);
+    D("adb_open: '%s' => fd %d", path, _fh_to_int(f));
     return _fh_to_int(f);
 }
 
 /* ignore mode on Win32 */
-int  adb_creat(const char*  path, int  mode)
-{
-    FH  f;
+int adb_creat(const char* path, int mode) {
+    FH f;
 
-    f = _fh_alloc( &_fh_file_class );
-    if ( !f ) {
+    f = _fh_alloc(&_fh_file_class);
+    if (!f) {
         return -1;
     }
 
@@ -393,23 +429,21 @@
     if (!android::base::UTF8ToWide(path, &path_wide)) {
         return -1;
     }
-    f->fh_handle = CreateFileW( path_wide.c_str(), GENERIC_WRITE,
-                                FILE_SHARE_READ | FILE_SHARE_WRITE,
-                                NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,
-                                NULL );
+    f->fh_handle = CreateFileW(path_wide.c_str(), GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE,
+                               NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
 
-    if ( f->fh_handle == INVALID_HANDLE_VALUE ) {
+    if (f->fh_handle == INVALID_HANDLE_VALUE) {
         const DWORD err = GetLastError();
         _fh_close(f);
-        D( "adb_creat: could not open '%s': ", path );
+        D("adb_creat: could not open '%s': ", path);
         switch (err) {
             case ERROR_FILE_NOT_FOUND:
-                D( "file not found" );
+                D("file not found");
                 errno = ENOENT;
                 return -1;
 
             case ERROR_PATH_NOT_FOUND:
-                D( "path not found" );
+                D("path not found");
                 errno = ENOTDIR;
                 return -1;
 
@@ -419,57 +453,64 @@
                 return -1;
         }
     }
-    snprintf( f->name, sizeof(f->name), "%d(%s)", _fh_to_int(f), path );
-    D( "adb_creat: '%s' => fd %d", path, _fh_to_int(f) );
+    snprintf(f->name, sizeof(f->name), "%d(%s)", _fh_to_int(f), path);
+    D("adb_creat: '%s' => fd %d", path, _fh_to_int(f));
     return _fh_to_int(f);
 }
 
-
-int  adb_read(int  fd, void* buf, int len)
-{
-    FH     f = _fh_from_int(fd, __func__);
+int adb_read(int fd, void* buf, int len) {
+    FH f = _fh_from_int(fd, __func__);
 
     if (f == NULL) {
+        errno = EBADF;
         return -1;
     }
 
-    return f->clazz->_fh_read( f, buf, len );
+    return f->clazz->_fh_read(f, buf, len);
 }
 
-
-int  adb_write(int  fd, const void*  buf, int  len)
-{
-    FH     f = _fh_from_int(fd, __func__);
+int adb_write(int fd, const void* buf, int len) {
+    FH f = _fh_from_int(fd, __func__);
 
     if (f == NULL) {
+        errno = EBADF;
         return -1;
     }
 
     return f->clazz->_fh_write(f, buf, len);
 }
 
+ssize_t adb_writev(int fd, const adb_iovec* iov, int iovcnt) {
+    FH f = _fh_from_int(fd, __func__);
 
-int  adb_lseek(int  fd, int  pos, int  where)
-{
-    FH     f = _fh_from_int(fd, __func__);
+    if (f == NULL) {
+        errno = EBADF;
+        return -1;
+    }
+
+    return f->clazz->_fh_writev(f, iov, iovcnt);
+}
+
+int adb_lseek(int fd, int pos, int where) {
+    FH f = _fh_from_int(fd, __func__);
 
     if (!f) {
+        errno = EBADF;
         return -1;
     }
 
     return f->clazz->_fh_lseek(f, pos, where);
 }
 
-
-int  adb_close(int  fd)
-{
-    FH   f = _fh_from_int(fd, __func__);
+int adb_close(int fd) {
+    FH f = _fh_from_int(fd, __func__);
 
     if (!f) {
+        errno = EBADF;
         return -1;
     }
 
-    D( "adb_close: %s", f->name);
+    D("adb_close: %s", f->name);
     _fh_close(f);
     return 0;
 }
@@ -529,6 +570,7 @@
     int skipped = 0;
     std::vector<WSAPOLLFD> sockets;
     std::vector<adb_pollfd*> original;
+
     for (size_t i = 0; i < nfds; ++i) {
         FH fh = _fh_from_int(fds[i].fd, __func__);
         if (!fh || !fh->used || fh->clazz != &_fh_socket_class) {
@@ -549,6 +591,11 @@
         return skipped;
     }
 
+    // If we have any invalid FDs in our FD set, make sure to return immediately.
+    if (skipped > 0) {
+        timeout = 0;
+    }
+
     int result = WSAPoll(sockets.data(), sockets.size(), timeout);
     if (result == SOCKET_ERROR) {
         _socket_set_errno(WSAGetLastError());
@@ -560,7 +607,7 @@
         original[i]->revents = sockets[i].revents;
     }
 
-    // WSAPoll appears to return the number of unique FDs with avaiable events, instead of how many
+    // WSAPoll appears to return the number of unique FDs with available events, instead of how many
     // of the pollfd elements have a non-zero revents field, which is what it and poll are specified
     // to do. Ignore its result and calculate the proper return value.
     result = 0;
@@ -576,7 +623,7 @@
     f->fh_socket = INVALID_SOCKET;
 }
 
-static int _fh_socket_close( FH  f ) {
+static int _fh_socket_close(FH f) {
     if (f->fh_socket != INVALID_SOCKET) {
         /* gently tell any peer that we're closing the socket */
         if (shutdown(f->fh_socket, SD_BOTH) == SOCKET_ERROR) {
@@ -597,13 +644,13 @@
     return 0;
 }
 
-static int _fh_socket_lseek( FH  f, int pos, int origin ) {
+static int _fh_socket_lseek(FH f, int pos, int origin) {
     errno = EPIPE;
     return -1;
 }
 
 static int _fh_socket_read(FH f, void* buf, int len) {
-    int  result = recv(f->fh_socket, reinterpret_cast<char*>(buf), len, 0);
+    int result = recv(f->fh_socket, reinterpret_cast<char*>(buf), len, 0);
     if (result == SOCKET_ERROR) {
         const DWORD err = WSAGetLastError();
         // WSAEWOULDBLOCK is normal with a non-blocking socket, so don't trace
@@ -615,11 +662,11 @@
         _socket_set_errno(err);
         result = -1;
     }
-    return  result;
+    return result;
 }
 
 static int _fh_socket_write(FH f, const void* buf, int len) {
-    int  result = send(f->fh_socket, reinterpret_cast<const char*>(buf), len, 0);
+    int result = send(f->fh_socket, reinterpret_cast<const char*>(buf), len, 0);
     if (result == SOCKET_ERROR) {
         const DWORD err = WSAGetLastError();
         // WSAEWOULDBLOCK is normal with a non-blocking socket, so don't trace
@@ -633,13 +680,44 @@
     } else {
         // According to https://code.google.com/p/chromium/issues/detail?id=27870
         // Winsock Layered Service Providers may cause this.
-        CHECK_LE(result, len) << "Tried to write " << len << " bytes to "
-                              << f->name << ", but " << result
-                              << " bytes reportedly written";
+        CHECK_LE(result, len) << "Tried to write " << len << " bytes to " << f->name << ", but "
+                              << result << " bytes reportedly written";
     }
     return result;
 }
 
+// Make sure that adb_iovec is compatible with WSABUF.
+static_assert(sizeof(adb_iovec) == sizeof(WSABUF), "");
+static_assert(SIZEOF_MEMBER(adb_iovec, iov_len) == SIZEOF_MEMBER(WSABUF, len), "");
+static_assert(offsetof(adb_iovec, iov_len) == offsetof(WSABUF, len), "");
+
+static_assert(SIZEOF_MEMBER(adb_iovec, iov_base) == SIZEOF_MEMBER(WSABUF, buf), "");
+static_assert(offsetof(adb_iovec, iov_base) == offsetof(WSABUF, buf), "");
+
+static int _fh_socket_writev(FH f, const adb_iovec* iov, int iovcnt) {
+    if (iovcnt <= 0) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    WSABUF* wsabuf = reinterpret_cast<WSABUF*>(const_cast<adb_iovec*>(iov));
+    DWORD bytes_written = 0;
+    int result = WSASend(f->fh_socket, wsabuf, iovcnt, &bytes_written, 0, nullptr, nullptr);
+    if (result == SOCKET_ERROR) {
+        const DWORD err = WSAGetLastError();
+        // WSAEWOULDBLOCK is normal with a non-blocking socket, so don't trace
+        // that to reduce spam and confusion.
+        if (err != WSAEWOULDBLOCK) {
+            D("send fd %d failed: %s", _fh_to_int(f),
+              android::base::SystemErrorCodeToString(err).c_str());
+        }
+        _socket_set_errno(err);
+        result = -1;
+    }
+    CHECK_GE(static_cast<DWORD>(std::numeric_limits<int>::max()), bytes_written);
+    return static_cast<int>(bytes_written);
+}
+
 /**************************************************************************/
 /**************************************************************************/
 /*****                                                                *****/
@@ -648,23 +726,15 @@
 /**************************************************************************/
 /**************************************************************************/
 
-#include <winsock2.h>
-
-static int  _winsock_init;
-
-static void
-_init_winsock( void )
-{
-    // TODO: Multiple threads calling this may potentially cause multiple calls
-    // to WSAStartup() which offers no real benefit.
-    if (!_winsock_init) {
-        WSADATA  wsaData;
-        int      rc = WSAStartup( MAKEWORD(2,2), &wsaData);
+static int _init_winsock(void) {
+    static std::once_flag once;
+    std::call_once(once, []() {
+        WSADATA wsaData;
+        int rc = WSAStartup(MAKEWORD(2, 2), &wsaData);
         if (rc != 0) {
             fatal("adb: could not initialize Winsock: %s",
                   android::base::SystemErrorCodeToString(rc).c_str());
         }
-        _winsock_init = 1;
 
         // Note that we do not call atexit() to register WSACleanup to be called
         // at normal process termination because:
@@ -679,9 +749,12 @@
         //    setupapi.dll which tries to load wintrust.dll which tries to load
         //    crypt32.dll which calls atexit() which tries to acquire the C
         //    Runtime lock that the other thread holds.
-    }
+    });
+    return 0;
 }
 
+static int _winsock_init = _init_winsock();
+
 // Map a socket type to an explicit socket protocol instead of using the socket
 // protocol of 0. Explicit socket protocols are used by most apps and we should
 // do the same to reduce the chance of exercising uncommon code-paths that might
@@ -709,8 +782,6 @@
         return -1;
     }
 
-    if (!_winsock_init) _init_winsock();
-
     memset(&addr, 0, sizeof(addr));
     addr.sin_family = AF_INET;
     addr.sin_port = htons(port);
@@ -759,8 +830,6 @@
         return -1;
     }
 
-    if (!_winsock_init) _init_winsock();
-
     memset(&addr, 0, sizeof(addr));
     addr.sin_family = AF_INET;
     addr.sin_port = htons(port);
@@ -837,8 +906,6 @@
         return -1;
     }
 
-    if (!_winsock_init) _init_winsock();
-
     struct addrinfo hints;
     memset(&hints, 0, sizeof(hints));
     hints.ai_family = AF_UNSPEC;
@@ -906,52 +973,49 @@
     return fd;
 }
 
-int  adb_register_socket(SOCKET s) {
-    FH f = _fh_alloc( &_fh_socket_class );
+int adb_register_socket(SOCKET s) {
+    FH f = _fh_alloc(&_fh_socket_class);
     f->fh_socket = s;
     return _fh_to_int(f);
 }
 
 #undef accept
-int  adb_socket_accept(int  serverfd, struct sockaddr*  addr, socklen_t  *addrlen)
-{
-    FH   serverfh = _fh_from_int(serverfd, __func__);
+int adb_socket_accept(int serverfd, struct sockaddr* addr, socklen_t* addrlen) {
+    FH serverfh = _fh_from_int(serverfd, __func__);
 
-    if ( !serverfh || serverfh->clazz != &_fh_socket_class ) {
+    if (!serverfh || serverfh->clazz != &_fh_socket_class) {
         D("adb_socket_accept: invalid fd %d", serverfd);
         errno = EBADF;
         return -1;
     }
 
-    unique_fh fh(_fh_alloc( &_fh_socket_class ));
+    unique_fh fh(_fh_alloc(&_fh_socket_class));
     if (!fh) {
         PLOG(ERROR) << "adb_socket_accept: failed to allocate accepted socket "
                        "descriptor";
         return -1;
     }
 
-    fh->fh_socket = accept( serverfh->fh_socket, addr, addrlen );
+    fh->fh_socket = accept(serverfh->fh_socket, addr, addrlen);
     if (fh->fh_socket == INVALID_SOCKET) {
         const DWORD err = WSAGetLastError();
-        LOG(ERROR) << "adb_socket_accept: accept on fd " << serverfd <<
-                      " failed: " + android::base::SystemErrorCodeToString(err);
-        _socket_set_errno( err );
+        LOG(ERROR) << "adb_socket_accept: accept on fd " << serverfd
+                   << " failed: " + android::base::SystemErrorCodeToString(err);
+        _socket_set_errno(err);
         return -1;
     }
 
     const int fd = _fh_to_int(fh.get());
-    snprintf( fh->name, sizeof(fh->name), "%d(accept:%s)", fd, serverfh->name );
-    D( "adb_socket_accept on fd %d returns fd %d", serverfd, fd );
+    snprintf(fh->name, sizeof(fh->name), "%d(accept:%s)", fd, serverfh->name);
+    D("adb_socket_accept on fd %d returns fd %d", serverfd, fd);
     fh.release();
-    return  fd;
+    return fd;
 }
 
+int adb_setsockopt(int fd, int level, int optname, const void* optval, socklen_t optlen) {
+    FH fh = _fh_from_int(fd, __func__);
 
-int  adb_setsockopt( int  fd, int  level, int  optname, const void*  optval, socklen_t  optlen )
-{
-    FH   fh = _fh_from_int(fd, __func__);
-
-    if ( !fh || fh->clazz != &_fh_socket_class ) {
+    if (!fh || fh->clazz != &_fh_socket_class) {
         D("adb_setsockopt: invalid fd %d", fd);
         errno = EBADF;
         return -1;
@@ -961,13 +1025,13 @@
     // to set SOL_SOCKET, SO_SNDBUF/SO_RCVBUF, ignore it since the OS has
     // auto-tuning.
 
-    int result = setsockopt( fh->fh_socket, level, optname,
-                             reinterpret_cast<const char*>(optval), optlen );
-    if ( result == SOCKET_ERROR ) {
+    int result =
+        setsockopt(fh->fh_socket, level, optname, reinterpret_cast<const char*>(optval), optlen);
+    if (result == SOCKET_ERROR) {
         const DWORD err = WSAGetLastError();
-        D("adb_setsockopt: setsockopt on fd %d level %d optname %d failed: %s\n",
-          fd, level, optname, android::base::SystemErrorCodeToString(err).c_str());
-        _socket_set_errno( err );
+        D("adb_setsockopt: setsockopt on fd %d level %d optname %d failed: %s\n", fd, level,
+          optname, android::base::SystemErrorCodeToString(err).c_str());
+        _socket_set_errno(err);
         result = -1;
     }
     return result;
diff --git a/adb/test_adb.py b/adb/test_adb.py
index e771106..ddd3ff0 100644
--- a/adb/test_adb.py
+++ b/adb/test_adb.py
@@ -21,9 +21,11 @@
 """
 from __future__ import print_function
 
+import binascii
 import contextlib
 import os
 import random
+import select
 import socket
 import struct
 import subprocess
@@ -33,8 +35,117 @@
 import adb
 
 
-class NonApiTest(unittest.TestCase):
-    """Tests for ADB that aren't a part of the AndroidDevice API."""
+@contextlib.contextmanager
+def fake_adbd(protocol=socket.AF_INET, port=0):
+    """Creates a fake ADB daemon that just replies with a CNXN packet."""
+
+    serversock = socket.socket(protocol, socket.SOCK_STREAM)
+    serversock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+    if protocol == socket.AF_INET:
+        serversock.bind(('127.0.0.1', port))
+    else:
+        serversock.bind(('::1', port))
+    serversock.listen(1)
+
+    # A pipe that is used to signal the thread that it should terminate.
+    readpipe, writepipe = os.pipe()
+
+    def _adb_packet(command, arg0, arg1, data):
+        bin_command = struct.unpack('I', command)[0]
+        buf = struct.pack('IIIIII', bin_command, arg0, arg1, len(data), 0,
+                          bin_command ^ 0xffffffff)
+        buf += data
+        return buf
+
+    def _handle():
+        rlist = [readpipe, serversock]
+        cnxn_sent = {}
+        while True:
+            read_ready, _, _ = select.select(rlist, [], [])
+            for ready in read_ready:
+                if ready == readpipe:
+                    # Closure pipe
+                    os.close(ready)
+                    serversock.shutdown(socket.SHUT_RDWR)
+                    serversock.close()
+                    return
+                elif ready == serversock:
+                    # Server socket
+                    conn, _ = ready.accept()
+                    rlist.append(conn)
+                else:
+                    # Client socket
+                    data = ready.recv(1024)
+                    if not data or data.startswith('OPEN'):
+                        if ready in cnxn_sent:
+                            del cnxn_sent[ready]
+                        ready.shutdown(socket.SHUT_RDWR)
+                        ready.close()
+                        rlist.remove(ready)
+                        continue
+                    if ready in cnxn_sent:
+                        continue
+                    cnxn_sent[ready] = True
+                    ready.sendall(_adb_packet('CNXN', 0x01000001, 1024 * 1024,
+                                              'device::ro.product.name=fakeadb'))
+
+    port = serversock.getsockname()[1]
+    server_thread = threading.Thread(target=_handle)
+    server_thread.start()
+
+    try:
+        yield port
+    finally:
+        os.close(writepipe)
+        server_thread.join()
+
+
+@contextlib.contextmanager
+def adb_connect(unittest, serial):
+    """Context manager for an ADB connection.
+
+    This automatically disconnects when done with the connection.
+    """
+
+    output = subprocess.check_output(['adb', 'connect', serial])
+    unittest.assertEqual(output.strip(), 'connected to {}'.format(serial))
+
+    try:
+        yield
+    finally:
+        # Perform best-effort disconnection. Discard the output.
+        subprocess.Popen(['adb', 'disconnect', serial],
+                         stdout=subprocess.PIPE,
+                         stderr=subprocess.PIPE).communicate()
+
+
+@contextlib.contextmanager
+def adb_server():
+    """Context manager for an ADB server.
+
+    This creates an ADB server and returns the port it's listening on.
+    """
+
+    port = 5038
+    # Kill any existing server on this non-default port.
+    subprocess.check_output(['adb', '-P', str(port), 'kill-server'],
+                            stderr=subprocess.STDOUT)
+    read_pipe, write_pipe = os.pipe()
+    proc = subprocess.Popen(['adb', '-L', 'tcp:localhost:{}'.format(port),
+                             'fork-server', 'server',
+                             '--reply-fd', str(write_pipe)])
+    try:
+        os.close(write_pipe)
+        greeting = os.read(read_pipe, 1024)
+        assert greeting == 'OK\n', repr(greeting)
+        yield port
+    finally:
+        proc.terminate()
+        proc.wait()
+
+
+class CommandlineTest(unittest.TestCase):
+    """Tests for the ADB commandline."""
 
     def test_help(self):
         """Make sure we get _something_ out of help."""
@@ -56,28 +167,37 @@
                 revision_line, r'^Revision [0-9a-f]{12}-android$')
 
     def test_tcpip_error_messages(self):
-        p = subprocess.Popen(['adb', 'tcpip'], stdout=subprocess.PIPE,
-                             stderr=subprocess.STDOUT)
-        out, _ = p.communicate()
-        self.assertEqual(1, p.returncode)
+        """Make sure 'adb tcpip' parsing is sane."""
+        proc = subprocess.Popen(['adb', 'tcpip'], stdout=subprocess.PIPE,
+                                stderr=subprocess.STDOUT)
+        out, _ = proc.communicate()
+        self.assertEqual(1, proc.returncode)
         self.assertIn('requires an argument', out)
 
-        p = subprocess.Popen(['adb', 'tcpip', 'foo'], stdout=subprocess.PIPE,
-                             stderr=subprocess.STDOUT)
-        out, _ = p.communicate()
-        self.assertEqual(1, p.returncode)
+        proc = subprocess.Popen(['adb', 'tcpip', 'foo'], stdout=subprocess.PIPE,
+                                stderr=subprocess.STDOUT)
+        out, _ = proc.communicate()
+        self.assertEqual(1, proc.returncode)
         self.assertIn('invalid port', out)
 
-    # Helper method that reads a pipe until it is closed, then sets the event.
-    def _read_pipe_and_set_event(self, pipe, event):
-        x = pipe.read()
+
+class ServerTest(unittest.TestCase):
+    """Tests for the ADB server."""
+
+    @staticmethod
+    def _read_pipe_and_set_event(pipe, event):
+        """Reads a pipe until it is closed, then sets the event."""
+        pipe.read()
         event.set()
 
-    # Test that launch_server() does not let the adb server inherit
-    # stdin/stdout/stderr handles which can cause callers of adb.exe to hang.
-    # This test also runs fine on unix even though the impetus is an issue
-    # unique to Windows.
     def test_handle_inheritance(self):
+        """Test that launch_server() does not inherit handles.
+
+        launch_server() should not let the adb server inherit
+        stdin/stdout/stderr handles, which can cause callers of adb.exe to hang.
+        This test also runs fine on unix even though the impetus is an issue
+        unique to Windows.
+        """
         # This test takes 5 seconds to run on Windows: if there is no adb server
         # running on the the port used below, adb kill-server tries to make a
         # TCP connection to a closed port and that takes 1 second on Windows;
@@ -99,29 +219,30 @@
 
         try:
             # Run the adb client and have it start the adb server.
-            p = subprocess.Popen(['adb', '-P', str(port), 'start-server'],
-                                 stdin=subprocess.PIPE, stdout=subprocess.PIPE,
-                                 stderr=subprocess.PIPE)
+            proc = subprocess.Popen(['adb', '-P', str(port), 'start-server'],
+                                    stdin=subprocess.PIPE,
+                                    stdout=subprocess.PIPE,
+                                    stderr=subprocess.PIPE)
 
             # Start threads that set events when stdout/stderr are closed.
             stdout_event = threading.Event()
             stdout_thread = threading.Thread(
-                    target=self._read_pipe_and_set_event,
-                    args=(p.stdout, stdout_event))
+                target=ServerTest._read_pipe_and_set_event,
+                args=(proc.stdout, stdout_event))
             stdout_thread.daemon = True
             stdout_thread.start()
 
             stderr_event = threading.Event()
             stderr_thread = threading.Thread(
-                    target=self._read_pipe_and_set_event,
-                    args=(p.stderr, stderr_event))
+                target=ServerTest._read_pipe_and_set_event,
+                args=(proc.stderr, stderr_event))
             stderr_thread.daemon = True
             stderr_thread.start()
 
             # Wait for the adb client to finish. Once that has occurred, if
             # stdin/stderr/stdout are still open, it must be open in the adb
             # server.
-            p.wait()
+            proc.wait()
 
             # Try to write to stdin which we expect is closed. If it isn't
             # closed, we should get an IOError. If we don't get an IOError,
@@ -129,7 +250,7 @@
             # probably letting the adb server inherit stdin which would be
             # wrong.
             with self.assertRaises(IOError):
-                p.stdin.write('x')
+                proc.stdin.write('x')
 
             # Wait a few seconds for stdout/stderr to be closed (in the success
             # case, this won't wait at all). If there is a timeout, that means
@@ -143,8 +264,12 @@
             subprocess.check_output(['adb', '-P', str(port), 'kill-server'],
                                     stderr=subprocess.STDOUT)
 
-    # Use SO_LINGER to cause TCP RST segment to be sent on socket close.
+
+class EmulatorTest(unittest.TestCase):
+    """Tests for the emulator connection."""
+
     def _reset_socket_on_close(self, sock):
+        """Use SO_LINGER to cause TCP RST segment to be sent on socket close."""
         # The linger structure is two shorts on Windows, but two ints on Unix.
         linger_format = 'hh' if os.name == 'nt' else 'ii'
         l_onoff = 1
@@ -162,19 +287,18 @@
 
         Bug: https://code.google.com/p/android/issues/detail?id=21021
         """
-        port = 12345
-
         with contextlib.closing(
-                socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as listener:
+            socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as listener:
             # Use SO_REUSEADDR so subsequent runs of the test can grab the port
             # even if it is in TIME_WAIT.
             listener.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-            listener.bind(('127.0.0.1', port))
+            listener.bind(('127.0.0.1', 0))
             listener.listen(4)
+            port = listener.getsockname()[1]
 
             # Now that listening has started, start adb emu kill, telling it to
             # connect to our mock emulator.
-            p = subprocess.Popen(
+            proc = subprocess.Popen(
                 ['adb', '-s', 'emulator-' + str(port), 'emu', 'kill'],
                 stderr=subprocess.STDOUT)
 
@@ -183,12 +307,16 @@
                 # If WSAECONNABORTED (10053) is raised by any socket calls,
                 # then adb probably isn't reading the data that we sent it.
                 conn.sendall('Android Console: type \'help\' for a list ' +
-                                'of commands\r\n')
+                             'of commands\r\n')
                 conn.sendall('OK\r\n')
 
-                with contextlib.closing(conn.makefile()) as f:
-                    self.assertEqual('kill\n', f.readline())
-                    self.assertEqual('quit\n', f.readline())
+                with contextlib.closing(conn.makefile()) as connf:
+                    line = connf.readline()
+                    if line.startswith('auth'):
+                        # Ignore the first auth line.
+                        line = connf.readline()
+                    self.assertEqual('kill\n', line)
+                    self.assertEqual('quit\n', connf.readline())
 
                 conn.sendall('OK: killing emulator, bye bye\r\n')
 
@@ -201,46 +329,117 @@
                 self._reset_socket_on_close(conn)
 
             # Wait for adb to finish, so we can check return code.
-            p.communicate()
+            proc.communicate()
 
             # If this fails, adb probably isn't ignoring WSAECONNRESET when
             # reading the response from the adb emu kill command (on Windows).
-            self.assertEqual(0, p.returncode)
+            self.assertEqual(0, proc.returncode)
+
+    def test_emulator_connect(self):
+        """Ensure that the emulator can connect.
+
+        Bug: http://b/78991667
+        """
+        with adb_server() as server_port:
+            with fake_adbd() as port:
+                serial = 'emulator-{}'.format(port - 1)
+                # Ensure that the emulator is not there.
+                try:
+                    subprocess.check_output(['adb', '-P', str(server_port),
+                                             '-s', serial, 'get-state'],
+                                            stderr=subprocess.STDOUT)
+                    self.fail('Device should not be available')
+                except subprocess.CalledProcessError as err:
+                    self.assertEqual(
+                        err.output.strip(),
+                        'error: device \'{}\' not found'.format(serial))
+
+                # Let the ADB server know that the emulator has started.
+                with contextlib.closing(
+                    socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as sock:
+                    sock.connect(('localhost', server_port))
+                    command = 'host:emulator:{}'.format(port)
+                    sock.sendall('%04x%s' % (len(command), command))
+
+                # Ensure the emulator is there.
+                subprocess.check_call(['adb', '-P', str(server_port),
+                                       '-s', serial, 'wait-for-device'])
+                output = subprocess.check_output(['adb', '-P', str(server_port),
+                                                  '-s', serial, 'get-state'])
+                self.assertEqual(output.strip(), 'device')
+
+
+class ConnectionTest(unittest.TestCase):
+    """Tests for adb connect."""
 
     def test_connect_ipv4_ipv6(self):
         """Ensure that `adb connect localhost:1234` will try both IPv4 and IPv6.
 
         Bug: http://b/30313466
         """
-        ipv4 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        ipv4.bind(('127.0.0.1', 0))
-        ipv4.listen(1)
+        for protocol in (socket.AF_INET, socket.AF_INET6):
+            try:
+                with fake_adbd(protocol=protocol) as port:
+                    serial = 'localhost:{}'.format(port)
+                    with adb_connect(self, serial):
+                        pass
+            except socket.error:
+                print("IPv6 not available, skipping")
+                continue
 
-        ipv6 = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
-        try:
-            ipv6.bind(('::1', ipv4.getsockname()[1] + 1))
-            ipv6.listen(1)
-        except socket.error:
-            print("IPv6 not available, skipping")
-            return
+    def test_already_connected(self):
+        """Ensure that an already-connected device stays connected."""
 
-        for s in (ipv4, ipv6):
-            port = s.getsockname()[1]
-            output = subprocess.check_output(
-                ['adb', 'connect', 'localhost:{}'.format(port)])
+        with fake_adbd() as port:
+            serial = 'localhost:{}'.format(port)
+            with adb_connect(self, serial):
+                # b/31250450: this always returns 0 but probably shouldn't.
+                output = subprocess.check_output(['adb', 'connect', serial])
+                self.assertEqual(
+                    output.strip(), 'already connected to {}'.format(serial))
 
-            self.assertEqual(
-                output.strip(), 'connected to localhost:{}'.format(port))
-            s.close()
+    def test_reconnect(self):
+        """Ensure that a disconnected device reconnects."""
+
+        with fake_adbd() as port:
+            serial = 'localhost:{}'.format(port)
+            with adb_connect(self, serial):
+                output = subprocess.check_output(['adb', '-s', serial,
+                                                  'get-state'])
+                self.assertEqual(output.strip(), 'device')
+
+                # This will fail.
+                proc = subprocess.Popen(['adb', '-s', serial, 'shell', 'true'],
+                                        stdout=subprocess.PIPE,
+                                        stderr=subprocess.STDOUT)
+                output, _ = proc.communicate()
+                self.assertEqual(output.strip(), 'error: closed')
+
+                subprocess.check_call(['adb', '-s', serial, 'wait-for-device'])
+
+                output = subprocess.check_output(['adb', '-s', serial,
+                                                  'get-state'])
+                self.assertEqual(output.strip(), 'device')
+
+                # Once we explicitly kick a device, it won't attempt to
+                # reconnect.
+                output = subprocess.check_output(['adb', 'disconnect', serial])
+                self.assertEqual(
+                    output.strip(), 'disconnected {}'.format(serial))
+                try:
+                    subprocess.check_output(['adb', '-s', serial, 'get-state'],
+                                            stderr=subprocess.STDOUT)
+                    self.fail('Device should not be available')
+                except subprocess.CalledProcessError as err:
+                    self.assertEqual(
+                        err.output.strip(),
+                        'error: device \'{}\' not found'.format(serial))
 
 
 def main():
+    """Main entrypoint."""
     random.seed(0)
-    if len(adb.get_devices()) > 0:
-        suite = unittest.TestLoader().loadTestsFromName(__name__)
-        unittest.TextTestRunner(verbosity=3).run(suite)
-    else:
-        print('Test suite must be run with attached devices')
+    unittest.main(verbosity=3)
 
 
 if __name__ == '__main__':
diff --git a/adb/test_device.py b/adb/test_device.py
index 72e1c67..f995be2 100644
--- a/adb/test_device.py
+++ b/adb/test_device.py
@@ -188,8 +188,6 @@
         finally:
             self.device.reverse_remove_all()
 
-    # Note: If you run this test when adb connect'd to a physical device over
-    # TCP, it will fail in adb reverse due to https://code.google.com/p/android/issues/detail?id=189821
     def test_forward_reverse_echo(self):
         """Send data through adb forward and read it back via adb reverse"""
         forward_port = 12345
@@ -1187,7 +1185,7 @@
         # Verify that the device ended up with the expected UTF-8 path
         output = self.device.shell(
                 ['ls', '/data/local/tmp/adb-test-*'])[0].strip()
-        self.assertEqual(remote_path.encode('utf-8'), output)
+        self.assertEqual(remote_path, output)
 
         # pull.
         self.device.pull(remote_path, tf.name)
diff --git a/adb/transport.cpp b/adb/transport.cpp
index 6b1a00b..7db9bf2 100644
--- a/adb/transport.cpp
+++ b/adb/transport.cpp
@@ -17,6 +17,8 @@
 #define TRACE_TAG TRANSPORT
 
 #include "sysdeps.h"
+#include "sysdeps/memory.h"
+
 #include "transport.h"
 
 #include <ctype.h>
@@ -28,8 +30,10 @@
 #include <unistd.h>
 
 #include <algorithm>
+#include <deque>
 #include <list>
 #include <mutex>
+#include <queue>
 #include <thread>
 
 #include <android-base/logging.h>
@@ -38,15 +42,18 @@
 #include <android-base/strings.h>
 #include <android-base/thread_annotations.h>
 
+#include <diagnose_usb.h>
+
 #include "adb.h"
 #include "adb_auth.h"
 #include "adb_io.h"
 #include "adb_trace.h"
 #include "adb_utils.h"
-#include "diagnose_usb.h"
 #include "fdevent.h"
 
-static void transport_unref(atransport *t);
+static void register_transport(atransport* transport);
+static void remove_transport(atransport* transport);
+static void transport_unref(atransport* transport);
 
 // TODO: unordered_map<TransportId, atransport*>
 static auto& transport_list = *new std::list<atransport*>();
@@ -60,11 +67,254 @@
 const char* const kFeatureLibusb = "libusb";
 const char* const kFeaturePushSync = "push_sync";
 
+namespace {
+
+// A class that helps the Clang Thread Safety Analysis deal with
+// std::unique_lock. Given that std::unique_lock is movable, and the analysis
+// can not currently perform alias analysis, it is not annotated. In order to
+// assert that the mutex is held, a ScopedAssumeLocked can be created just after
+// the std::unique_lock.
+class SCOPED_CAPABILITY ScopedAssumeLocked {
+  public:
+    ScopedAssumeLocked(std::mutex& mutex) ACQUIRE(mutex) {}
+    ~ScopedAssumeLocked() RELEASE() {}
+};
+
+// Tracks and handles atransport*s that are attempting reconnection.
+class ReconnectHandler {
+  public:
+    ReconnectHandler() = default;
+    ~ReconnectHandler() = default;
+
+    // Starts the ReconnectHandler thread.
+    void Start();
+
+    // Requests the ReconnectHandler thread to stop.
+    void Stop();
+
+    // Adds the atransport* to the queue of reconnect attempts.
+    void TrackTransport(atransport* transport);
+
+  private:
+    // The main thread loop.
+    void Run();
+
+    // Tracks a reconnection attempt.
+    struct ReconnectAttempt {
+        atransport* transport;
+        std::chrono::system_clock::time_point deadline;
+        size_t attempts_left;
+    };
+
+    // Only retry for up to one minute.
+    static constexpr const std::chrono::seconds kDefaultTimeout = std::chrono::seconds(10);
+    static constexpr const size_t kMaxAttempts = 6;
+
+    // Protects all members.
+    std::mutex reconnect_mutex_;
+    bool running_ GUARDED_BY(reconnect_mutex_) = true;
+    std::thread handler_thread_;
+    std::condition_variable reconnect_cv_;
+    std::queue<ReconnectAttempt> reconnect_queue_ GUARDED_BY(reconnect_mutex_);
+
+    DISALLOW_COPY_AND_ASSIGN(ReconnectHandler);
+};
+
+void ReconnectHandler::Start() {
+    check_main_thread();
+    handler_thread_ = std::thread(&ReconnectHandler::Run, this);
+}
+
+void ReconnectHandler::Stop() {
+    check_main_thread();
+    {
+        std::lock_guard<std::mutex> lock(reconnect_mutex_);
+        running_ = false;
+    }
+    reconnect_cv_.notify_one();
+    handler_thread_.join();
+
+    // Drain the queue to free all resources.
+    std::lock_guard<std::mutex> lock(reconnect_mutex_);
+    while (!reconnect_queue_.empty()) {
+        ReconnectAttempt attempt = reconnect_queue_.front();
+        reconnect_queue_.pop();
+        remove_transport(attempt.transport);
+    }
+}
+
+void ReconnectHandler::TrackTransport(atransport* transport) {
+    check_main_thread();
+    {
+        std::lock_guard<std::mutex> lock(reconnect_mutex_);
+        if (!running_) return;
+        reconnect_queue_.emplace(ReconnectAttempt{
+            transport, std::chrono::system_clock::now() + ReconnectHandler::kDefaultTimeout,
+            ReconnectHandler::kMaxAttempts});
+    }
+    reconnect_cv_.notify_one();
+}
+
+void ReconnectHandler::Run() {
+    while (true) {
+        ReconnectAttempt attempt;
+        {
+            std::unique_lock<std::mutex> lock(reconnect_mutex_);
+            ScopedAssumeLocked assume_lock(reconnect_mutex_);
+
+            auto deadline = std::chrono::time_point<std::chrono::system_clock>::max();
+            if (!reconnect_queue_.empty()) deadline = reconnect_queue_.front().deadline;
+            reconnect_cv_.wait_until(lock, deadline, [&]() REQUIRES(reconnect_mutex_) {
+                return !running_ ||
+                       (!reconnect_queue_.empty() && reconnect_queue_.front().deadline < deadline);
+            });
+
+            if (!running_) return;
+            attempt = reconnect_queue_.front();
+            reconnect_queue_.pop();
+            if (attempt.transport->kicked()) {
+                D("transport %s was kicked. giving up on it.", attempt.transport->serial);
+                remove_transport(attempt.transport);
+                continue;
+            }
+        }
+        D("attempting to reconnect %s", attempt.transport->serial);
+
+        if (!attempt.transport->Reconnect()) {
+            D("attempting to reconnect %s failed.", attempt.transport->serial);
+            if (attempt.attempts_left == 0) {
+                D("transport %s exceeded the number of retry attempts. giving up on it.",
+                  attempt.transport->serial);
+                remove_transport(attempt.transport);
+                continue;
+            }
+
+            std::lock_guard<std::mutex> lock(reconnect_mutex_);
+            reconnect_queue_.emplace(ReconnectAttempt{
+                attempt.transport,
+                std::chrono::system_clock::now() + ReconnectHandler::kDefaultTimeout,
+                attempt.attempts_left - 1});
+            continue;
+        }
+
+        D("reconnection to %s succeeded.", attempt.transport->serial);
+        register_transport(attempt.transport);
+    }
+}
+
+static auto& reconnect_handler = *new ReconnectHandler();
+
+}  // namespace
+
 TransportId NextTransportId() {
     static std::atomic<TransportId> next(1);
     return next++;
 }
 
+BlockingConnectionAdapter::BlockingConnectionAdapter(std::unique_ptr<BlockingConnection> connection)
+    : underlying_(std::move(connection)) {}
+
+BlockingConnectionAdapter::~BlockingConnectionAdapter() {
+    LOG(INFO) << "BlockingConnectionAdapter(" << this->transport_name_ << "): destructing";
+    Stop();
+}
+
+void BlockingConnectionAdapter::Start() {
+    std::lock_guard<std::mutex> lock(mutex_);
+    if (started_) {
+        LOG(FATAL) << "BlockingConnectionAdapter(" << this->transport_name_
+                   << "): started multiple times";
+    }
+
+    read_thread_ = std::thread([this]() {
+        LOG(INFO) << this->transport_name_ << ": read thread spawning";
+        while (true) {
+            auto packet = std::make_unique<apacket>();
+            if (!underlying_->Read(packet.get())) {
+                PLOG(INFO) << this->transport_name_ << ": read failed";
+                break;
+            }
+            read_callback_(this, std::move(packet));
+        }
+        std::call_once(this->error_flag_, [this]() { this->error_callback_(this, "read failed"); });
+    });
+
+    write_thread_ = std::thread([this]() {
+        LOG(INFO) << this->transport_name_ << ": write thread spawning";
+        while (true) {
+            std::unique_lock<std::mutex> lock(mutex_);
+            ScopedAssumeLocked assume_locked(mutex_);
+            cv_.wait(lock, [this]() REQUIRES(mutex_) {
+                return this->stopped_ || !this->write_queue_.empty();
+            });
+
+            if (this->stopped_) {
+                return;
+            }
+
+            std::unique_ptr<apacket> packet = std::move(this->write_queue_.front());
+            this->write_queue_.pop_front();
+            lock.unlock();
+
+            if (!this->underlying_->Write(packet.get())) {
+                break;
+            }
+        }
+        std::call_once(this->error_flag_, [this]() { this->error_callback_(this, "write failed"); });
+    });
+
+    started_ = true;
+}
+
+void BlockingConnectionAdapter::Stop() {
+    {
+        std::lock_guard<std::mutex> lock(mutex_);
+        if (!started_) {
+            LOG(INFO) << "BlockingConnectionAdapter(" << this->transport_name_ << "): not started";
+            return;
+        }
+
+        if (stopped_) {
+            LOG(INFO) << "BlockingConnectionAdapter(" << this->transport_name_
+                      << "): already stopped";
+            return;
+        }
+
+        stopped_ = true;
+    }
+
+    LOG(INFO) << "BlockingConnectionAdapter(" << this->transport_name_ << "): stopping";
+
+    this->underlying_->Close();
+    this->cv_.notify_one();
+
+    // Move the threads out into locals with the lock taken, and then unlock to let them exit.
+    std::thread read_thread;
+    std::thread write_thread;
+
+    {
+        std::lock_guard<std::mutex> lock(mutex_);
+        read_thread = std::move(read_thread_);
+        write_thread = std::move(write_thread_);
+    }
+
+    read_thread.join();
+    write_thread.join();
+
+    LOG(INFO) << "BlockingConnectionAdapter(" << this->transport_name_ << "): stopped";
+    std::call_once(this->error_flag_, [this]() { this->error_callback_(this, "requested stop"); });
+}
+
+bool BlockingConnectionAdapter::Write(std::unique_ptr<apacket> packet) {
+    {
+        std::lock_guard<std::mutex> lock(this->mutex_);
+        write_queue_.emplace_back(std::move(packet));
+    }
+
+    cv_.notify_one();
+    return true;
+}
+
 bool FdConnection::Read(apacket* packet) {
     if (!ReadFdExactly(fd_.get(), &packet->msg, sizeof(amessage))) {
         D("remote local: read terminated (message)");
@@ -143,67 +393,6 @@
     return result;
 }
 
-static int read_packet(int fd, const char* name, apacket** ppacket) {
-    ATRACE_NAME("read_packet");
-    char buff[8];
-    if (!name) {
-        snprintf(buff, sizeof buff, "fd=%d", fd);
-        name = buff;
-    }
-    char* p = reinterpret_cast<char*>(ppacket); /* really read a packet address */
-    int len = sizeof(apacket*);
-    while (len > 0) {
-        int r = adb_read(fd, p, len);
-        if (r > 0) {
-            len -= r;
-            p += r;
-        } else {
-            D("%s: read_packet (fd=%d), error ret=%d: %s", name, fd, r, strerror(errno));
-            return -1;
-        }
-    }
-
-    VLOG(TRANSPORT) << dump_packet(name, "from remote", *ppacket);
-    return 0;
-}
-
-static int write_packet(int fd, const char* name, apacket** ppacket) {
-    ATRACE_NAME("write_packet");
-    char buff[8];
-    if (!name) {
-        snprintf(buff, sizeof buff, "fd=%d", fd);
-        name = buff;
-    }
-    VLOG(TRANSPORT) << dump_packet(name, "to remote", *ppacket);
-    char* p = reinterpret_cast<char*>(ppacket); /* we really write the packet address */
-    int len = sizeof(apacket*);
-    while (len > 0) {
-        int r = adb_write(fd, p, len);
-        if (r > 0) {
-            len -= r;
-            p += r;
-        } else {
-            D("%s: write_packet (fd=%d) error ret=%d: %s", name, fd, r, strerror(errno));
-            return -1;
-        }
-    }
-    return 0;
-}
-
-static void transport_socket_events(int fd, unsigned events, void* _t) {
-    atransport* t = reinterpret_cast<atransport*>(_t);
-    D("transport_socket_events(fd=%d, events=%04x,...)", fd, events);
-    if (events & FDE_READ) {
-        apacket* p = 0;
-        if (read_packet(fd, t->serial, &p)) {
-            D("%s: failed to read packet from transport socket on fd %d", t->serial, fd);
-            return;
-        }
-
-        handle_packet(p, (atransport*)_t);
-    }
-}
-
 void send_packet(apacket* p, atransport* t) {
     p->msg.magic = p->msg.command ^ 0xffffffff;
     // compute a checksum for connection/auth packets for compatibility reasons
@@ -213,162 +402,18 @@
         p->msg.data_check = calculate_apacket_checksum(p);
     }
 
-    print_packet("send", p);
+    VLOG(TRANSPORT) << dump_packet(t->serial, "to remote", p);
 
     if (t == NULL) {
         fatal("Transport is null");
     }
 
-    if (write_packet(t->transport_socket, t->serial, &p)) {
-        fatal_errno("cannot enqueue packet on transport socket");
+    if (t->Write(p) != 0) {
+        D("%s: failed to enqueue packet, closing transport", t->serial);
+        t->Kick();
     }
 }
 
-// The transport is opened by transport_register_func before
-// the read_transport and write_transport threads are started.
-//
-// The read_transport thread issues a SYNC(1, token) message to let
-// the write_transport thread know to start things up.  In the event
-// of transport IO failure, the read_transport thread will post a
-// SYNC(0,0) message to ensure shutdown.
-//
-// The transport will not actually be closed until both threads exit, but the threads
-// will kick the transport on their way out to disconnect the underlying device.
-//
-// read_transport thread reads data from a transport (representing a usb/tcp connection),
-// and makes the main thread call handle_packet().
-static void read_transport_thread(void* _t) {
-    atransport* t = reinterpret_cast<atransport*>(_t);
-    apacket* p;
-
-    adb_thread_setname(
-        android::base::StringPrintf("<-%s", (t->serial != nullptr ? t->serial : "transport")));
-    D("%s: starting read_transport thread on fd %d, SYNC online (%d)", t->serial, t->fd,
-      t->sync_token + 1);
-    p = get_apacket();
-    p->msg.command = A_SYNC;
-    p->msg.arg0 = 1;
-    p->msg.arg1 = ++(t->sync_token);
-    p->msg.magic = A_SYNC ^ 0xffffffff;
-    D("sending SYNC packet (len = %u, payload.size() = %zu)", p->msg.data_length, p->payload.size());
-    if (write_packet(t->fd, t->serial, &p)) {
-        put_apacket(p);
-        D("%s: failed to write SYNC packet", t->serial);
-        goto oops;
-    }
-
-    D("%s: data pump started", t->serial);
-    for (;;) {
-        ATRACE_NAME("read_transport loop");
-        p = get_apacket();
-
-        {
-            ATRACE_NAME("read_transport read_remote");
-            if (!t->connection->Read(p)) {
-                D("%s: remote read failed for transport", t->serial);
-                put_apacket(p);
-                break;
-            }
-
-            if (!check_header(p, t)) {
-                D("%s: remote read: bad header", t->serial);
-                put_apacket(p);
-                break;
-            }
-
-#if ADB_HOST
-            if (p->msg.command == 0) {
-                put_apacket(p);
-                continue;
-            }
-#endif
-        }
-
-        D("%s: received remote packet, sending to transport", t->serial);
-        if (write_packet(t->fd, t->serial, &p)) {
-            put_apacket(p);
-            D("%s: failed to write apacket to transport", t->serial);
-            goto oops;
-        }
-    }
-
-    D("%s: SYNC offline for transport", t->serial);
-    p = get_apacket();
-    p->msg.command = A_SYNC;
-    p->msg.arg0 = 0;
-    p->msg.arg1 = 0;
-    p->msg.magic = A_SYNC ^ 0xffffffff;
-    if (write_packet(t->fd, t->serial, &p)) {
-        put_apacket(p);
-        D("%s: failed to write SYNC apacket to transport", t->serial);
-    }
-
-oops:
-    D("%s: read_transport thread is exiting", t->serial);
-    kick_transport(t);
-    transport_unref(t);
-}
-
-// write_transport thread gets packets sent by the main thread (through send_packet()),
-// and writes to a transport (representing a usb/tcp connection).
-static void write_transport_thread(void* _t) {
-    atransport* t = reinterpret_cast<atransport*>(_t);
-    apacket* p;
-    int active = 0;
-
-    adb_thread_setname(
-        android::base::StringPrintf("->%s", (t->serial != nullptr ? t->serial : "transport")));
-    D("%s: starting write_transport thread, reading from fd %d", t->serial, t->fd);
-
-    for (;;) {
-        ATRACE_NAME("write_transport loop");
-        if (read_packet(t->fd, t->serial, &p)) {
-            D("%s: failed to read apacket from transport on fd %d", t->serial, t->fd);
-            break;
-        }
-
-        if (p->msg.command == A_SYNC) {
-            if (p->msg.arg0 == 0) {
-                D("%s: transport SYNC offline", t->serial);
-                put_apacket(p);
-                break;
-            } else {
-                if (p->msg.arg1 == t->sync_token) {
-                    D("%s: transport SYNC online", t->serial);
-                    active = 1;
-                } else {
-                    D("%s: transport ignoring SYNC %d != %d", t->serial, p->msg.arg1, t->sync_token);
-                }
-            }
-        } else {
-            if (active) {
-                D("%s: transport got packet, sending to remote", t->serial);
-                ATRACE_NAME("write_transport write_remote");
-
-                // Allow sending the payload's implicit null terminator.
-                if (p->msg.data_length != p->payload.size()) {
-                    LOG(FATAL) << "packet data length doesn't match payload: msg.data_length = "
-                               << p->msg.data_length << ", payload.size() = " << p->payload.size();
-                }
-
-                if (t->Write(p) != 0) {
-                    D("%s: remote write failed for transport", t->serial);
-                    put_apacket(p);
-                    break;
-                }
-            } else {
-                D("%s: transport ignoring packet while offline", t->serial);
-            }
-        }
-
-        put_apacket(p);
-    }
-
-    D("%s: write_transport thread is exiting, fd %d", t->serial, t->fd);
-    kick_transport(t);
-    transport_unref(t);
-}
-
 void kick_transport(atransport* t) {
     std::lock_guard<std::recursive_mutex> lock(transport_lock);
     // As kick_transport() can be called from threads without guarantee that t is valid,
@@ -382,7 +427,7 @@
 
 static int transport_registration_send = -1;
 static int transport_registration_recv = -1;
-static fdevent transport_registration_fde;
+static fdevent* transport_registration_fde;
 
 #if ADB_HOST
 
@@ -429,7 +474,7 @@
     delete tracker;
 }
 
-static int device_tracker_enqueue(asocket* socket, std::string) {
+static int device_tracker_enqueue(asocket* socket, apacket::payload_type) {
     /* you can't read from a device tracker, close immediately */
     device_tracker_close(socket);
     return -1;
@@ -438,7 +483,7 @@
 static int device_tracker_send(device_tracker* tracker, const std::string& string) {
     asocket* peer = tracker->socket.peer;
 
-    std::string data;
+    apacket::payload_type data;
     data.resize(4 + string.size());
     char buf[5];
     snprintf(buf, sizeof(buf), "%04x", static_cast<int>(string.size()));
@@ -559,9 +604,8 @@
     return 0;
 }
 
-static void transport_registration_func(int _fd, unsigned ev, void* data) {
+static void transport_registration_func(int _fd, unsigned ev, void*) {
     tmsg m;
-    int s[2];
     atransport* t;
 
     if (!(ev & FDE_READ)) {
@@ -575,13 +619,7 @@
     t = m.transport;
 
     if (m.action == 0) {
-        D("transport: %s removing and free'ing %d", t->serial, t->transport_socket);
-
-        /* IMPORTANT: the remove closes one half of the
-        ** socket pair.  The close closes the other half.
-        */
-        fdevent_remove(&(t->transport_fde));
-        adb_close(t->fd);
+        D("transport: %s deleting", t->serial);
 
         {
             std::lock_guard<std::recursive_mutex> lock(transport_lock);
@@ -602,35 +640,53 @@
 
     /* don't create transport threads for inaccessible devices */
     if (t->GetConnectionState() != kCsNoPerm) {
-        /* initial references are the two threads */
-        t->ref_count = 2;
+        // 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)) {
+                D("%s: remote read: bad header", t->serial);
+                return false;
+            }
 
-        if (adb_socketpair(s)) {
-            fatal_errno("cannot open transport socketpair");
-        }
+            VLOG(TRANSPORT) << dump_packet(t->serial, "from remote", p.get());
+            apacket* packet = p.release();
 
-        D("transport: %s socketpair: (%d,%d) starting", t->serial, s[0], s[1]);
+            // TODO: Does this need to run on the main thread?
+            fdevent_run_on_main_thread([packet, t]() { handle_packet(packet, t); });
+            return true;
+        });
+        t->connection()->SetErrorCallback([t](Connection*, const std::string& error) {
+            D("%s: connection terminated: %s", t->serial, error.c_str());
+            fdevent_run_on_main_thread([t]() {
+                handle_offline(t);
+                transport_unref(t);
+            });
+        });
 
-        t->transport_socket = s[0];
-        t->fd = s[1];
-
-        fdevent_install(&(t->transport_fde), t->transport_socket, transport_socket_events, t);
-
-        fdevent_set(&(t->transport_fde), FDE_READ);
-
-        std::thread(write_transport_thread, t).detach();
-        std::thread(read_transport_thread, t).detach();
+        t->connection()->Start();
+#if ADB_HOST
+        send_connect(t);
+#endif
     }
 
     {
         std::lock_guard<std::recursive_mutex> lock(transport_lock);
-        pending_list.remove(t);
-        transport_list.push_front(t);
+        auto it = std::find(pending_list.begin(), pending_list.end(), t);
+        if (it != pending_list.end()) {
+            pending_list.remove(t);
+            transport_list.push_front(t);
+        }
     }
 
     update_transports();
 }
 
+void init_reconnect_handler(void) {
+    reconnect_handler.Start();
+}
+
 void init_transport_registration(void) {
     int s[2];
 
@@ -642,13 +698,13 @@
     transport_registration_send = s[0];
     transport_registration_recv = s[1];
 
-    fdevent_install(&transport_registration_fde, transport_registration_recv,
-                    transport_registration_func, 0);
-
-    fdevent_set(&transport_registration_fde, FDE_READ);
+    transport_registration_fde =
+        fdevent_create(transport_registration_recv, transport_registration_func, 0);
+    fdevent_set(transport_registration_fde, FDE_READ);
 }
 
 void kick_all_transports() {
+    reconnect_handler.Stop();
     // To avoid only writing part of a packet to a transport after exit, kick all transports.
     std::lock_guard<std::recursive_mutex> lock(transport_lock);
     for (auto t : transport_list) {
@@ -678,15 +734,21 @@
 }
 
 static void transport_unref(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) {
-        D("transport: %s unref (kicking and closing)", t->serial);
-        t->connection->Close();
-        remove_transport(t);
+        t->connection()->Stop();
+        if (t->IsTcpDevice() && !t->kicked()) {
+            D("transport: %s unref (attempting reconnection) %d", t->serial, t->kicked());
+            reconnect_handler.TrackTransport(t);
+        } else {
+            D("transport: %s unref (kicking and closing)", t->serial);
+            remove_transport(t);
+        }
     } else {
         D("transport: %s unref (count=%zu)", t->serial, t->ref_count);
     }
@@ -736,9 +798,7 @@
     std::unique_lock<std::recursive_mutex> lock(transport_lock);
     for (const auto& t : transport_list) {
         if (t->GetConnectionState() == kCsNoPerm) {
-#if ADB_HOST
             *error_out = UsbNoPermissionsLongHelpText();
-#endif
             continue;
         }
 
@@ -787,22 +847,41 @@
     }
     lock.unlock();
 
-    // Don't return unauthorized devices; the caller can't do anything with them.
-    if (result && result->GetConnectionState() == kCsUnauthorized && !accept_any_state) {
-        *error_out = "device unauthorized.\n";
-        char* ADB_VENDOR_KEYS = getenv("ADB_VENDOR_KEYS");
-        *error_out += "This adb server's $ADB_VENDOR_KEYS is ";
-        *error_out += ADB_VENDOR_KEYS ? ADB_VENDOR_KEYS : "not set";
-        *error_out += "\n";
-        *error_out += "Try 'adb kill-server' if that seems wrong.\n";
-        *error_out += "Otherwise check for a confirmation dialog on your device.";
-        result = nullptr;
-    }
+    if (result && !accept_any_state) {
+        // The caller requires an active transport.
+        // Make sure that we're actually connected.
+        ConnectionState state = result->GetConnectionState();
+        switch (state) {
+            case kCsConnecting:
+                *error_out = "device still connecting";
+                result = nullptr;
+                break;
 
-    // Don't return offline devices; the caller can't do anything with them.
-    if (result && result->GetConnectionState() == kCsOffline && !accept_any_state) {
-        *error_out = "device offline";
-        result = nullptr;
+            case kCsAuthorizing:
+                *error_out = "device still authorizing";
+                result = nullptr;
+                break;
+
+            case kCsUnauthorized: {
+                *error_out = "device unauthorized.\n";
+                char* ADB_VENDOR_KEYS = getenv("ADB_VENDOR_KEYS");
+                *error_out += "This adb server's $ADB_VENDOR_KEYS is ";
+                *error_out += ADB_VENDOR_KEYS ? ADB_VENDOR_KEYS : "not set";
+                *error_out += "\n";
+                *error_out += "Try 'adb kill-server' if that seems wrong.\n";
+                *error_out += "Otherwise check for a confirmation dialog on your device.";
+                result = nullptr;
+                break;
+            }
+
+            case kCsOffline:
+                *error_out = "device offline";
+                result = nullptr;
+                break;
+
+            default:
+                break;
+        }
     }
 
     if (result) {
@@ -812,15 +891,38 @@
     return result;
 }
 
+bool ConnectionWaitable::WaitForConnection(std::chrono::milliseconds timeout) {
+    std::unique_lock<std::mutex> lock(mutex_);
+    ScopedAssumeLocked assume_locked(mutex_);
+    return cv_.wait_for(lock, timeout, [&]() REQUIRES(mutex_) {
+        return connection_established_ready_;
+    }) && connection_established_;
+}
+
+void ConnectionWaitable::SetConnectionEstablished(bool success) {
+    {
+        std::lock_guard<std::mutex> lock(mutex_);
+        if (connection_established_ready_) return;
+        connection_established_ready_ = true;
+        connection_established_ = success;
+        D("connection established with %d", success);
+    }
+    cv_.notify_one();
+}
+
+atransport::~atransport() {
+    // If the connection callback had not been run before, run it now.
+    SetConnectionEstablished(false);
+}
+
 int atransport::Write(apacket* p) {
-    return this->connection->Write(p) ? 0 : -1;
+    return this->connection()->Write(std::unique_ptr<apacket>(p)) ? 0 : -1;
 }
 
 void atransport::Kick() {
-    if (!kicked_) {
-        D("kicking transport %s", this->serial);
-        kicked_ = true;
-        this->connection->Close();
+    if (!kicked_.exchange(true)) {
+        D("kicking transport %p %s", this, this->serial);
+        this->connection()->Stop();
     }
 }
 
@@ -833,7 +935,12 @@
     connection_state_ = state;
 }
 
-const std::string atransport::connection_state_name() const {
+void atransport::SetConnection(std::unique_ptr<Connection> connection) {
+    std::lock_guard<std::mutex> lock(mutex_);
+    connection_ = std::shared_ptr<Connection>(std::move(connection));
+}
+
+std::string atransport::connection_state_name() const {
     ConnectionState state = GetConnectionState();
     switch (state) {
         case kCsOffline:
@@ -852,6 +959,10 @@
             return "sideload";
         case kCsUnauthorized:
             return "unauthorized";
+        case kCsAuthorizing:
+            return "authorizing";
+        case kCsConnecting:
+            return "connecting";
         default:
             return "unknown";
     }
@@ -964,6 +1075,14 @@
            qual_match(target.c_str(), "device:", device, false);
 }
 
+void atransport::SetConnectionEstablished(bool success) {
+    connection_waitable_->SetConnectionEstablished(success);
+}
+
+bool atransport::Reconnect() {
+    return reconnect_(this);
+}
+
 #if ADB_HOST
 
 // We use newline as our delimiter, make sure to never output it.
@@ -1044,8 +1163,9 @@
 }
 #endif  // ADB_HOST
 
-int register_socket_transport(int s, const char* serial, int port, int local) {
-    atransport* t = new atransport();
+int register_socket_transport(int s, const char* serial, int port, int local,
+                              atransport::ReconnectCallback reconnect) {
+    atransport* t = new atransport(std::move(reconnect), kCsOffline);
 
     if (!serial) {
         char buf[32];
@@ -1065,7 +1185,7 @@
             VLOG(TRANSPORT) << "socket transport " << transport->serial
                             << " is already in pending_list and fails to register";
             delete t;
-            return -1;
+            return -EALREADY;
         }
     }
 
@@ -1074,7 +1194,7 @@
             VLOG(TRANSPORT) << "socket transport " << transport->serial
                             << " is already in transport_list and fails to register";
             delete t;
-            return -1;
+            return -EALREADY;
         }
     }
 
@@ -1083,8 +1203,15 @@
 
     lock.unlock();
 
+    auto waitable = t->connection_waitable();
     register_transport(t);
-    return 0;
+
+    if (local == 1) {
+        // Do not wait for emulator transports.
+        return 0;
+    }
+
+    return waitable->WaitForConnection(std::chrono::seconds(10)) ? 0 : -1;
 }
 
 #if ADB_HOST
@@ -1119,7 +1246,7 @@
 
 void register_usb_transport(usb_handle* usb, const char* serial, const char* devpath,
                             unsigned writeable) {
-    atransport* t = new atransport((writeable ? kCsOffline : kCsNoPerm));
+    atransport* t = new atransport(writeable ? kCsOffline : kCsNoPerm);
 
     D("transport: %p init'ing for usb_handle %p (sn='%s')", t, usb, serial ? serial : "");
     init_usb_transport(t, usb);
@@ -1143,8 +1270,9 @@
 void unregister_usb_transport(usb_handle* usb) {
     std::lock_guard<std::recursive_mutex> lock(transport_lock);
     transport_list.remove_if([usb](atransport* t) {
-        if (auto connection = dynamic_cast<UsbConnection*>(t->connection.get())) {
-            return connection->handle_ == usb && t->GetConnectionState() == kCsNoPerm;
+        auto connection = t->connection();
+        if (auto usb_connection = dynamic_cast<UsbConnection*>(connection.get())) {
+            return usb_connection->handle_ == usb && t->GetConnectionState() == kCsNoPerm;
         }
         return false;
     });
diff --git a/adb/transport.h b/adb/transport.h
index 9700f44..ae9cc02 100644
--- a/adb/transport.h
+++ b/adb/transport.h
@@ -20,14 +20,19 @@
 #include <sys/types.h>
 
 #include <atomic>
+#include <chrono>
+#include <condition_variable>
 #include <deque>
 #include <functional>
 #include <list>
 #include <memory>
 #include <mutex>
 #include <string>
+#include <thread>
 #include <unordered_set>
 
+#include <android-base/macros.h>
+#include <android-base/thread_annotations.h>
 #include <openssl/rsa.h>
 
 #include "adb.h"
@@ -57,15 +62,47 @@
 
 TransportId NextTransportId();
 
-// Abstraction for a blocking packet transport.
+// Abstraction for a non-blocking packet transport.
 struct Connection {
     Connection() = default;
-    Connection(const Connection& copy) = delete;
-    Connection(Connection&& move) = delete;
-
-    // Destroy a Connection. Formerly known as 'Close' in atransport.
     virtual ~Connection() = default;
 
+    void SetTransportName(std::string transport_name) {
+        transport_name_ = std::move(transport_name);
+    }
+
+    using ReadCallback = std::function<bool(Connection*, std::unique_ptr<apacket>)>;
+    void SetReadCallback(ReadCallback callback) {
+        CHECK(!read_callback_);
+        read_callback_ = callback;
+    }
+
+    // Called after the Connection has terminated, either by an error or because Stop was called.
+    using ErrorCallback = std::function<void(Connection*, const std::string&)>;
+    void SetErrorCallback(ErrorCallback callback) {
+        CHECK(!error_callback_);
+        error_callback_ = callback;
+    }
+
+    virtual bool Write(std::unique_ptr<apacket> packet) = 0;
+
+    virtual void Start() = 0;
+    virtual void Stop() = 0;
+
+    std::string transport_name_;
+    ReadCallback read_callback_;
+    ErrorCallback error_callback_;
+};
+
+// Abstraction for a blocking packet transport.
+struct BlockingConnection {
+    BlockingConnection() = default;
+    BlockingConnection(const BlockingConnection& copy) = delete;
+    BlockingConnection(BlockingConnection&& move) = delete;
+
+    // Destroy a BlockingConnection. Formerly known as 'Close' in atransport.
+    virtual ~BlockingConnection() = default;
+
     // Read/Write a packet. These functions are concurrently called from a transport's reader/writer
     // threads.
     virtual bool Read(apacket* packet) = 0;
@@ -77,7 +114,31 @@
     virtual void Close() = 0;
 };
 
-struct FdConnection : public Connection {
+struct BlockingConnectionAdapter : public Connection {
+    explicit BlockingConnectionAdapter(std::unique_ptr<BlockingConnection> connection);
+
+    virtual ~BlockingConnectionAdapter();
+
+    virtual bool Write(std::unique_ptr<apacket> packet) override final;
+
+    virtual void Start() override final;
+    virtual void Stop() override final;
+
+    bool started_ GUARDED_BY(mutex_) = false;
+    bool stopped_ GUARDED_BY(mutex_) = false;
+
+    std::unique_ptr<BlockingConnection> underlying_;
+    std::thread read_thread_ GUARDED_BY(mutex_);
+    std::thread write_thread_ GUARDED_BY(mutex_);
+
+    std::deque<std::unique_ptr<apacket>> write_queue_ GUARDED_BY(mutex_);
+    std::mutex mutex_;
+    std::condition_variable cv_;
+
+    std::once_flag error_flag_;
+};
+
+struct FdConnection : public BlockingConnection {
     explicit FdConnection(unique_fd fd) : fd_(std::move(fd)) {}
 
     bool Read(apacket* packet) override final;
@@ -89,7 +150,7 @@
     unique_fd fd_;
 };
 
-struct UsbConnection : public Connection {
+struct UsbConnection : public BlockingConnection {
     explicit UsbConnection(usb_handle* handle) : handle_(handle) {}
     ~UsbConnection();
 
@@ -101,6 +162,35 @@
     usb_handle* handle_;
 };
 
+// Waits for a transport's connection to be not pending. This is a separate
+// object so that the transport can be destroyed and another thread can be
+// notified of it in a race-free way.
+class ConnectionWaitable {
+  public:
+    ConnectionWaitable() = default;
+    ~ConnectionWaitable() = default;
+
+    // Waits until the first CNXN packet has been received by the owning
+    // atransport, or the specified timeout has elapsed. Can be called from any
+    // thread.
+    //
+    // Returns true if the CNXN packet was received in a timely fashion, false
+    // otherwise.
+    bool WaitForConnection(std::chrono::milliseconds timeout);
+
+    // Can be called from any thread when the connection stops being pending.
+    // Only the first invocation will be acknowledged, the rest will be no-ops.
+    void SetConnectionEstablished(bool success);
+
+  private:
+    bool connection_established_ GUARDED_BY(mutex_) = false;
+    bool connection_established_ready_ GUARDED_BY(mutex_) = false;
+    std::mutex mutex_;
+    std::condition_variable cv_;
+
+    DISALLOW_COPY_AND_ASSIGN(ConnectionWaitable);
+};
+
 class atransport {
   public:
     // TODO(danalbert): We expose waaaaaaay too much stuff because this was
@@ -108,34 +198,43 @@
     // class in one go is a very large change. Given how bad our testing is,
     // it's better to do this piece by piece.
 
-    atransport(ConnectionState state = kCsOffline)
-        : id(NextTransportId()), connection_state_(state) {
-        transport_fde = {};
+    using ReconnectCallback = std::function<bool(atransport*)>;
+
+    atransport(ReconnectCallback reconnect, ConnectionState state)
+        : id(NextTransportId()),
+          kicked_(false),
+          connection_state_(state),
+          connection_waitable_(std::make_shared<ConnectionWaitable>()),
+          connection_(nullptr),
+          reconnect_(std::move(reconnect)) {
         // Initialize protocol to min version for compatibility with older versions.
         // Version will be updated post-connect.
         protocol_version = A_VERSION_MIN;
         max_payload = MAX_PAYLOAD;
     }
-    virtual ~atransport() {}
+    atransport(ConnectionState state = kCsOffline)
+        : atransport([](atransport*) { return false; }, state) {}
+    virtual ~atransport();
 
     int Write(apacket* p);
     void Kick();
+    bool kicked() const { return kicked_; }
 
     // ConnectionState can be read by all threads, but can only be written in the main thread.
     ConnectionState GetConnectionState() const;
     void SetConnectionState(ConnectionState state);
 
+    void SetConnection(std::unique_ptr<Connection> connection);
+    std::shared_ptr<Connection> connection() {
+        std::lock_guard<std::mutex> lock(mutex_);
+        return connection_;
+    }
+
     const TransportId id;
-    int fd = -1;
-    int transport_socket = -1;
-    fdevent transport_fde;
     size_t ref_count = 0;
-    uint32_t sync_token = 0;
     bool online = false;
     TransportType type = kTransportAny;
 
-    std::unique_ptr<Connection> connection;
-
     // Used to identify transports for clients.
     char* serial = nullptr;
     char* product = nullptr;
@@ -152,8 +251,8 @@
     char token[TOKEN_SIZE] = {};
     size_t failed_auth_attempts = 0;
 
-    const std::string serial_name() const { return serial ? serial : "<unknown>"; }
-    const std::string connection_state_name() const;
+    std::string serial_name() const { return serial ? serial : "<unknown>"; }
+    std::string connection_state_name() const;
 
     void update_version(int version, size_t payload);
     int get_protocol_version() const;
@@ -187,8 +286,19 @@
     // This is to make it easier to use the same network target for both fastboot and adb.
     bool MatchesTarget(const std::string& target) const;
 
-private:
-    bool kicked_ = false;
+    // Notifies that the atransport is no longer waiting for the connection
+    // being established.
+    void SetConnectionEstablished(bool success);
+
+    // Gets a shared reference to the ConnectionWaitable.
+    std::shared_ptr<ConnectionWaitable> connection_waitable() { return connection_waitable_; }
+
+    // Attempts to reconnect with the underlying Connection. Returns true if the
+    // reconnection attempt succeeded.
+    bool Reconnect();
+
+  private:
+    std::atomic<bool> kicked_;
 
     // A set of features transmitted in the banner with the initial connection.
     // This is stored in the banner as 'features=feature0,feature1,etc'.
@@ -204,6 +314,18 @@
     std::deque<std::shared_ptr<RSA>> keys_;
 #endif
 
+    // A sharable object that can be used to wait for the atransport's
+    // connection to be established.
+    std::shared_ptr<ConnectionWaitable> connection_waitable_;
+
+    // The underlying connection object.
+    std::shared_ptr<Connection> connection_ GUARDED_BY(mutex_);
+
+    // A callback that will be invoked when the atransport needs to reconnect.
+    ReconnectCallback reconnect_;
+
+    std::mutex mutex_;
+
     DISALLOW_COPY_AND_ASSIGN(atransport);
 };
 
@@ -225,6 +347,7 @@
 // Stops iteration and returns false if fn returns false, otherwise returns true.
 bool iterate_transports(std::function<bool(const atransport*)> fn);
 
+void init_reconnect_handler(void);
 void init_transport_registration(void);
 void init_mdns_transport_discovery(void);
 std::string list_transports(bool long_listing);
@@ -239,7 +362,8 @@
 void connect_device(const std::string& address, std::string* response);
 
 /* cause new transports to be init'd and added to the list */
-int register_socket_transport(int s, const char* serial, int port, int local);
+int register_socket_transport(int s, const char* serial, int port, int local,
+                              atransport::ReconnectCallback reconnect);
 
 // This should only be used for transports with connection_state == kCsNoPerm.
 void unregister_usb_transport(usb_handle* usb);
diff --git a/adb/transport_benchmark.cpp b/adb/transport_benchmark.cpp
new file mode 100644
index 0000000..da24aa7
--- /dev/null
+++ b/adb/transport_benchmark.cpp
@@ -0,0 +1,183 @@
+/*
+ * 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 <malloc.h>
+#include <stdio.h>
+
+#include <android-base/logging.h>
+#include <benchmark/benchmark.h>
+
+#include "adb_trace.h"
+#include "sysdeps.h"
+#include "transport.h"
+
+#define ADB_CONNECTION_BENCHMARK(benchmark_name, ...)               \
+    BENCHMARK_TEMPLATE(benchmark_name, FdConnection, ##__VA_ARGS__) \
+        ->Arg(1)                                                    \
+        ->Arg(16384)                                                \
+        ->Arg(MAX_PAYLOAD)                                          \
+        ->UseRealTime()
+
+template <typename ConnectionType>
+std::unique_ptr<Connection> MakeConnection(unique_fd fd);
+
+template <>
+std::unique_ptr<Connection> MakeConnection<FdConnection>(unique_fd fd) {
+    auto fd_connection = std::make_unique<FdConnection>(std::move(fd));
+    return std::make_unique<BlockingConnectionAdapter>(std::move(fd_connection));
+}
+
+template <typename ConnectionType>
+void BM_Connection_Unidirectional(benchmark::State& state) {
+    int fds[2];
+    if (adb_socketpair(fds) != 0) {
+        LOG(FATAL) << "failed to create socketpair";
+    }
+
+    auto client = MakeConnection<ConnectionType>(unique_fd(fds[0]));
+    auto server = MakeConnection<ConnectionType>(unique_fd(fds[1]));
+
+    std::atomic<size_t> received_bytes;
+
+    client->SetReadCallback([](Connection*, std::unique_ptr<apacket>) -> bool { return true; });
+    server->SetReadCallback([&received_bytes](Connection*, std::unique_ptr<apacket> packet) -> bool {
+        received_bytes += packet->payload.size();
+        return true;
+    });
+
+    client->SetErrorCallback(
+        [](Connection*, const std::string& error) { LOG(INFO) << "client closed: " << error; });
+    server->SetErrorCallback(
+        [](Connection*, const std::string& error) { LOG(INFO) << "server closed: " << error; });
+
+    client->Start();
+    server->Start();
+
+    for (auto _ : state) {
+        size_t data_size = state.range(0);
+        std::unique_ptr<apacket> packet = std::make_unique<apacket>();
+        memset(&packet->msg, 0, sizeof(packet->msg));
+        packet->msg.command = A_WRTE;
+        packet->msg.data_length = data_size;
+        packet->payload.resize(data_size);
+
+        memset(&packet->payload[0], 0xff, data_size);
+
+        received_bytes = 0;
+        client->Write(std::move(packet));
+        while (received_bytes < data_size) {
+            continue;
+        }
+    }
+    state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) * state.range(0));
+
+    client->Stop();
+    server->Stop();
+}
+
+ADB_CONNECTION_BENCHMARK(BM_Connection_Unidirectional);
+
+enum class ThreadPolicy {
+    MainThread,
+    SameThread,
+};
+
+template <typename ConnectionType, enum ThreadPolicy Policy>
+void BM_Connection_Echo(benchmark::State& state) {
+    int fds[2];
+    if (adb_socketpair(fds) != 0) {
+        LOG(FATAL) << "failed to create socketpair";
+    }
+
+    auto client = MakeConnection<ConnectionType>(unique_fd(fds[0]));
+    auto server = MakeConnection<ConnectionType>(unique_fd(fds[1]));
+
+    std::atomic<size_t> received_bytes;
+
+    fdevent_reset();
+    std::thread fdevent_thread([]() { fdevent_loop(); });
+
+    client->SetReadCallback([&received_bytes](Connection*, std::unique_ptr<apacket> packet) -> bool {
+        received_bytes += packet->payload.size();
+        return true;
+    });
+
+    static const auto handle_packet = [](Connection* connection, std::unique_ptr<apacket> packet) {
+        connection->Write(std::move(packet));
+    };
+
+    server->SetReadCallback([](Connection* connection, std::unique_ptr<apacket> packet) -> bool {
+        if (Policy == ThreadPolicy::MainThread) {
+            auto raw_packet = packet.release();
+            fdevent_run_on_main_thread([connection, raw_packet]() {
+                std::unique_ptr<apacket> packet(raw_packet);
+                handle_packet(connection, std::move(packet));
+            });
+        } else {
+            handle_packet(connection, std::move(packet));
+        }
+        return true;
+    });
+
+    client->SetErrorCallback(
+        [](Connection*, const std::string& error) { LOG(INFO) << "client closed: " << error; });
+    server->SetErrorCallback(
+        [](Connection*, const std::string& error) { LOG(INFO) << "server closed: " << error; });
+
+    client->Start();
+    server->Start();
+
+    for (auto _ : state) {
+        size_t data_size = state.range(0);
+        std::unique_ptr<apacket> packet = std::make_unique<apacket>();
+        memset(&packet->msg, 0, sizeof(packet->msg));
+        packet->msg.command = A_WRTE;
+        packet->msg.data_length = data_size;
+        packet->payload.resize(data_size);
+
+        memset(&packet->payload[0], 0xff, data_size);
+
+        received_bytes = 0;
+        client->Write(std::move(packet));
+        while (received_bytes < data_size) {
+            continue;
+        }
+    }
+    state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) * state.range(0));
+
+    client->Stop();
+    server->Stop();
+
+    // TODO: Make it so that you don't need to poke the fdevent loop to make it terminate?
+    fdevent_terminate_loop();
+    fdevent_run_on_main_thread([]() {});
+
+    fdevent_thread.join();
+}
+
+ADB_CONNECTION_BENCHMARK(BM_Connection_Echo, ThreadPolicy::SameThread);
+ADB_CONNECTION_BENCHMARK(BM_Connection_Echo, ThreadPolicy::MainThread);
+
+int main(int argc, char** argv) {
+    // Set M_DECAY_TIME so that our allocations aren't immediately purged on free.
+    mallopt(M_DECAY_TIME, 1);
+
+    android::base::SetMinimumLogSeverity(android::base::WARNING);
+    adb_trace_init(argv);
+    ::benchmark::Initialize(&argc, argv);
+    if (::benchmark::ReportUnrecognizedArguments(argc, argv)) return 1;
+    ::benchmark::RunSpecifiedBenchmarks();
+}
diff --git a/adb/transport_local.cpp b/adb/transport_local.cpp
index 560a031..181d666 100644
--- a/adb/transport_local.cpp
+++ b/adb/transport_local.cpp
@@ -45,6 +45,7 @@
 #include "adb_unique_fd.h"
 #include "adb_utils.h"
 #include "sysdeps/chrono.h"
+#include "sysdeps/memory.h"
 
 #if ADB_HOST
 
@@ -67,28 +68,24 @@
     return local_connect_arbitrary_ports(port - 1, port, &dummy) == 0;
 }
 
-void connect_device(const std::string& address, std::string* response) {
-    if (address.empty()) {
-        *response = "empty address";
-        return;
-    }
-
+std::tuple<unique_fd, int, std::string> tcp_connect(const std::string& address,
+                                                    std::string* response) {
     std::string serial;
     std::string host;
     int port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT;
     if (!android::base::ParseNetAddress(address, &host, &port, &serial, response)) {
-        return;
+        return std::make_tuple(unique_fd(), port, serial);
     }
 
     std::string error;
-    int fd = network_connect(host.c_str(), port, SOCK_STREAM, 10, &error);
+    unique_fd fd(network_connect(host.c_str(), port, SOCK_STREAM, 10, &error));
     if (fd == -1) {
         *response = android::base::StringPrintf("unable to connect to %s: %s",
                                                 serial.c_str(), error.c_str());
-        return;
+        return std::make_tuple(std::move(fd), port, serial);
     }
 
-    D("client: connected %s remote on fd %d", serial.c_str(), fd);
+    D("client: connected %s remote on fd %d", serial.c_str(), fd.get());
     close_on_exec(fd);
     disable_tcp_nagle(fd);
 
@@ -97,10 +94,45 @@
         D("warning: failed to configure TCP keepalives (%s)", strerror(errno));
     }
 
-    int ret = register_socket_transport(fd, serial.c_str(), port, 0);
+    return std::make_tuple(std::move(fd), port, serial);
+}
+
+void connect_device(const std::string& address, std::string* response) {
+    if (address.empty()) {
+        *response = "empty address";
+        return;
+    }
+
+    unique_fd fd;
+    int port;
+    std::string serial;
+    std::tie(fd, port, serial) = tcp_connect(address, response);
+    auto reconnect = [address](atransport* t) {
+        std::string response;
+        unique_fd fd;
+        int port;
+        std::string serial;
+        std::tie(fd, port, serial) = tcp_connect(address, &response);
+        if (fd == -1) {
+            D("reconnect failed: %s", response.c_str());
+            return false;
+        }
+
+        // This invokes the part of register_socket_transport() that needs to be
+        // invoked if the atransport* has already been setup. This eventually
+        // calls atransport->SetConnection() with a newly created Connection*
+        // that will in turn send the CNXN packet.
+        return init_socket_transport(t, fd.release(), port, 0) >= 0;
+    };
+
+    int ret = register_socket_transport(fd.release(), serial.c_str(), port, 0, std::move(reconnect));
     if (ret < 0) {
         adb_close(fd);
-        *response = android::base::StringPrintf("already connected to %s", serial.c_str());
+        if (ret == -EALREADY) {
+            *response = android::base::StringPrintf("already connected to %s", serial.c_str());
+        } else {
+            *response = android::base::StringPrintf("failed to connect to %s", serial.c_str());
+        }
     } else {
         *response = android::base::StringPrintf("connected to %s", serial.c_str());
     }
@@ -130,7 +162,8 @@
         close_on_exec(fd);
         disable_tcp_nagle(fd);
         std::string serial = getEmulatorSerialString(console_port);
-        if (register_socket_transport(fd, serial.c_str(), adb_port, 1) == 0) {
+        if (register_socket_transport(fd, serial.c_str(), adb_port, 1,
+                                      [](atransport*) { return false; }) == 0) {
             return 0;
         }
         adb_close(fd);
@@ -234,7 +267,8 @@
             close_on_exec(fd);
             disable_tcp_nagle(fd);
             std::string serial = android::base::StringPrintf("host-%d", fd);
-            if (register_socket_transport(fd, serial.c_str(), port, 1) != 0) {
+            if (register_socket_transport(fd, serial.c_str(), port, 1,
+                                          [](atransport*) { return false; }) != 0) {
                 adb_close(fd);
             }
         }
@@ -333,7 +367,8 @@
                 /* Host is connected. Register the transport, and start the
                  * exchange. */
                 std::string serial = android::base::StringPrintf("host-%d", fd);
-                if (register_socket_transport(fd, serial.c_str(), port, 1) != 0 ||
+                if (register_socket_transport(fd, serial.c_str(), port, 1,
+                                              [](atransport*) { return false; }) != 0 ||
                     !WriteFdExactly(fd, _start_req, strlen(_start_req))) {
                     adb_close(fd);
                 }
@@ -445,13 +480,14 @@
     int fail = 0;
 
     unique_fd fd(s);
-    t->sync_token = 1;
     t->type = kTransportLocal;
 
 #if ADB_HOST
     // Emulator connection.
     if (local) {
-        t->connection.reset(new EmulatorConnection(std::move(fd), adb_port));
+        auto emulator_connection = std::make_unique<EmulatorConnection>(std::move(fd), adb_port);
+        t->SetConnection(
+            std::make_unique<BlockingConnectionAdapter>(std::move(emulator_connection)));
         std::lock_guard<std::mutex> lock(local_transports_lock);
         atransport* existing_transport = find_emulator_transport_by_adb_port_locked(adb_port);
         if (existing_transport != NULL) {
@@ -470,6 +506,7 @@
 #endif
 
     // Regular tcp connection.
-    t->connection.reset(new FdConnection(std::move(fd)));
+    auto fd_connection = std::make_unique<FdConnection>(std::move(fd));
+    t->SetConnection(std::make_unique<BlockingConnectionAdapter>(std::move(fd_connection)));
     return fail;
 }
diff --git a/adb/transport_usb.cpp b/adb/transport_usb.cpp
index d7565f6..94b2e37 100644
--- a/adb/transport_usb.cpp
+++ b/adb/transport_usb.cpp
@@ -17,6 +17,7 @@
 #define TRACE_TAG TRANSPORT
 
 #include "sysdeps.h"
+#include "sysdeps/memory.h"
 #include "transport.h"
 
 #include <stdio.h>
@@ -174,8 +175,8 @@
 
 void init_usb_transport(atransport* t, usb_handle* h) {
     D("transport: usb");
-    t->connection.reset(new UsbConnection(h));
-    t->sync_token = 1;
+    auto connection = std::make_unique<UsbConnection>(h);
+    t->SetConnection(std::make_unique<BlockingConnectionAdapter>(std::move(connection)));
     t->type = kTransportUsb;
 }
 
diff --git a/adb/types.h b/adb/types.h
new file mode 100644
index 0000000..c6b3f07
--- /dev/null
+++ b/adb/types.h
@@ -0,0 +1,338 @@
+/*
+ * 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 <algorithm>
+#include <deque>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+#include <android-base/logging.h>
+
+#include "sysdeps/memory.h"
+#include "sysdeps/uio.h"
+
+// Essentially std::vector<char>, except without zero initialization or reallocation.
+struct Block {
+    using iterator = char*;
+
+    Block() {}
+
+    explicit Block(size_t size) { allocate(size); }
+
+    template <typename Iterator>
+    Block(Iterator begin, Iterator end) : Block(end - begin) {
+        std::copy(begin, end, data_);
+    }
+
+    Block(const Block& copy) = delete;
+    Block(Block&& move) {
+        std::swap(data_, move.data_);
+        std::swap(capacity_, move.capacity_);
+        std::swap(size_, move.size_);
+    }
+
+    Block& operator=(const Block& copy) = delete;
+    Block& operator=(Block&& move) {
+        clear();
+
+        std::swap(data_, move.data_);
+        std::swap(capacity_, move.capacity_);
+        std::swap(size_, move.size_);
+
+        return *this;
+    }
+
+    ~Block() { clear(); }
+
+    void resize(size_t new_size) {
+        if (!data_) {
+            allocate(new_size);
+        } else {
+            CHECK_GE(capacity_, new_size);
+            size_ = new_size;
+        }
+    }
+
+    template <typename InputIt>
+    void assign(InputIt begin, InputIt end) {
+        clear();
+        allocate(end - begin);
+        std::copy(begin, end, data_);
+    }
+
+    void clear() {
+        free(data_);
+        capacity_ = 0;
+        size_ = 0;
+    }
+
+    size_t capacity() const { return capacity_; }
+    size_t size() const { return size_; }
+    bool empty() const { return size() == 0; }
+
+    char* data() { return data_; }
+    const char* data() const { return data_; }
+
+    char* begin() { return data_; }
+    const char* begin() const { return data_; }
+
+    char* end() { return data() + size_; }
+    const char* end() const { return data() + size_; }
+
+    char& operator[](size_t idx) { return data()[idx]; }
+    const char& operator[](size_t idx) const { return data()[idx]; }
+
+    bool operator==(const Block& rhs) const {
+        return size() == rhs.size() && memcmp(data(), rhs.data(), size()) == 0;
+    }
+
+  private:
+    void allocate(size_t size) {
+        CHECK(data_ == nullptr);
+        CHECK_EQ(0ULL, capacity_);
+        CHECK_EQ(0ULL, size_);
+        if (size != 0) {
+            data_ = static_cast<char*>(malloc(size));
+            capacity_ = size;
+            size_ = size;
+        }
+    }
+
+    char* data_ = nullptr;
+    size_t capacity_ = 0;
+    size_t size_ = 0;
+};
+
+struct amessage {
+    uint32_t command;     /* command identifier constant      */
+    uint32_t arg0;        /* first argument                   */
+    uint32_t arg1;        /* second argument                  */
+    uint32_t data_length; /* length of payload (0 is allowed) */
+    uint32_t data_check;  /* checksum of data payload         */
+    uint32_t magic;       /* command ^ 0xffffffff             */
+};
+
+struct apacket {
+    using payload_type = Block;
+    amessage msg;
+    payload_type payload;
+};
+
+struct IOVector {
+    using value_type = char;
+    using block_type = Block;
+    using size_type = size_t;
+
+    IOVector() {}
+
+    explicit IOVector(std::unique_ptr<block_type> block) {
+        append(std::move(block));
+    }
+
+    IOVector(const IOVector& copy) = delete;
+    IOVector(IOVector&& move) : IOVector() {
+        *this = std::move(move);
+    }
+
+    IOVector& operator=(const IOVector& copy) = delete;
+    IOVector& operator=(IOVector&& move) {
+        chain_ = std::move(move.chain_);
+        chain_length_ = move.chain_length_;
+        begin_offset_ = move.begin_offset_;
+        end_offset_ = move.end_offset_;
+
+        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_; }
+    bool empty() const { return size() == 0; }
+
+    void clear() {
+        chain_length_ = 0;
+        begin_offset_ = 0;
+        end_offset_ = 0;
+        chain_.clear();
+    }
+
+    // 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;
+    }
+
+    // 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) {
+        CHECK_NE(0ULL, block->size());
+        CHECK_EQ(0ULL, end_offset_);
+        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;
+    }
+
+  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));
+    }
+
+    // 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();
+    }
+
+    // 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) {
+            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();
+
+            // Note that both of these conditions can be true if there's only one block.
+            if (i == 0) {
+                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);
+        }
+    }
+
+  public:
+    // Copy all of the blocks into a single block.
+    template <typename CollectionType = block_type>
+    CollectionType coalesce() const {
+        CollectionType result;
+        if (size() == 0) {
+            return result;
+        }
+
+        result.resize(size());
+
+        size_t offset = 0;
+        iterate_blocks([&offset, &result](const char* data, size_t len) {
+            memcpy(&result[offset], data, len);
+            offset += len;
+        });
+
+        return result;
+    }
+
+    template <typename FunctionType>
+    auto coalesced(FunctionType&& f) const ->
+        typename std::result_of<FunctionType(const char*, size_t)>::type {
+        if (chain_.size() == 1) {
+            // If we only have one block, we can use it directly.
+            return f(chain_.front()->data() + begin_offset_, size());
+        } else {
+            // Otherwise, copy to a single block.
+            auto data = coalesce();
+            return f(data.data(), data.size());
+        }
+    }
+
+    // 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;
+    }
+
+  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_;
+};
diff --git a/adb/types_test.cpp b/adb/types_test.cpp
new file mode 100644
index 0000000..31ab90a
--- /dev/null
+++ b/adb/types_test.cpp
@@ -0,0 +1,119 @@
+/*
+ * 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 <gtest/gtest.h>
+
+#include "sysdeps/memory.h"
+#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 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);
+    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());
+    return copy;
+}
+
+TEST(IOVector, empty) {
+    // Empty IOVector.
+    IOVector bc;
+    CHECK_EQ(0ULL, bc.coalesce().size());
+}
+
+TEST(IOVector, single_block) {
+    // A single block.
+    auto block = create_block('x', 100);
+    IOVector bc;
+    bc.append(copy_block(block));
+    ASSERT_EQ(100ULL, bc.size());
+    auto coalesced = bc.coalesce();
+    ASSERT_EQ(*block, coalesced);
+}
+
+TEST(IOVector, single_block_split) {
+    // One block split.
+    IOVector bc;
+    bc.append(create_block("foobar"));
+    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());
+}
+
+TEST(IOVector, aligned_split) {
+    IOVector bc;
+    bc.append(create_block("foo"));
+    bc.append(create_block("bar"));
+    bc.append(create_block("baz"));
+    ASSERT_EQ(9ULL, bc.size());
+
+    IOVector foo = bc.take_front(3);
+    ASSERT_EQ(3ULL, foo.size());
+    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());
+
+    IOVector baz = bc.take_front(3);
+    ASSERT_EQ(3ULL, baz.size());
+    ASSERT_EQ(*create_block("baz"), baz.coalesce());
+
+    ASSERT_EQ(0ULL, bc.size());
+}
+
+TEST(IOVector, misaligned_split) {
+    IOVector bc;
+    bc.append(create_block("foo"));
+    bc.append(create_block("bar"));
+    bc.append(create_block("baz"));
+    bc.append(create_block("qux"));
+    bc.append(create_block("quux"));
+
+    // 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());
+
+    // 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());
+
+    // 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());
+
+    // 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(1ULL, bc.size());
+    ASSERT_EQ(*create_block("x"), bc.coalesce());
+}
diff --git a/base/Android.bp b/base/Android.bp
index 5d70d47..3d80d97 100644
--- a/base/Android.bp
+++ b/base/Android.bp
@@ -26,6 +26,7 @@
 cc_library_headers {
     name: "libbase_headers",
     vendor_available: true,
+    recovery_available: true,
     host_supported: true,
     export_include_dirs: ["include"],
 
@@ -47,18 +48,17 @@
         "file.cpp",
         "logging.cpp",
         "parsenetaddress.cpp",
+        "properties.cpp",
         "quick_exit.cpp",
         "stringprintf.cpp",
         "strings.cpp",
+        "threads.cpp",
         "test_utils.cpp",
     ],
 
     shared_libs: ["liblog"],
     target: {
         android: {
-            srcs: [
-                "properties.cpp",
-            ],
             sanitize: {
                 misc_undefined: ["integer"],
             },
@@ -93,6 +93,7 @@
     name: "libbase",
     defaults: ["libbase_defaults"],
     vendor_available: true,
+    recovery_available: true,
     host_supported: true,
     vndk: {
         enabled: true,
@@ -123,9 +124,11 @@
         "errors_test.cpp",
         "file_test.cpp",
         "logging_test.cpp",
+        "macros_test.cpp",
         "parsedouble_test.cpp",
         "parseint_test.cpp",
         "parsenetaddress_test.cpp",
+        "properties_test.cpp",
         "quick_exit_test.cpp",
         "scopeguard_test.cpp",
         "stringprintf_test.cpp",
@@ -135,7 +138,6 @@
     ],
     target: {
         android: {
-            srcs: ["properties_test.cpp"],
             sanitize: {
                 misc_undefined: ["integer"],
             },
@@ -160,4 +162,5 @@
             suffix: "64",
         },
     },
+    test_suites: ["device-tests"],
 }
diff --git a/base/include/android-base/logging.h b/base/include/android-base/logging.h
index cc7aaf6..05a12e7 100644
--- a/base/include/android-base/logging.h
+++ b/base/include/android-base/logging.h
@@ -100,8 +100,17 @@
                                        unsigned int, const char*)>;
 using AbortFunction = std::function<void(const char*)>;
 
+// Loggers for use with InitLogging/SetLogger.
+
+// Log to the kernel log (dmesg).
 void KernelLogger(LogId, LogSeverity, const char*, const char*, unsigned int, const char*);
+// Log to stderr in the full logcat format (with pid/tid/time/tag details).
 void StderrLogger(LogId, LogSeverity, const char*, const char*, unsigned int, const char*);
+// Log just the message to stdout/stderr (without pid/tid/time/tag details).
+// The choice of stdout versus stderr is based on the severity.
+// Errors are also prefixed by the program name (as with err(3)/error(3)).
+// Useful for replacing printf(3)/perror(3)/err(3)/error(3) in command-line tools.
+void StdioLogger(LogId, LogSeverity, const char*, const char*, unsigned int, const char*);
 
 void DefaultAborter(const char* abort_message);
 
diff --git a/base/include/android-base/macros.h b/base/include/android-base/macros.h
index 25f2ff4..fd6efb2 100644
--- a/base/include/android-base/macros.h
+++ b/base/include/android-base/macros.h
@@ -20,6 +20,8 @@
 #include <stddef.h>  // for size_t
 #include <unistd.h>  // for TEMP_FAILURE_RETRY
 
+#include <utility>
+
 // bionic and glibc both have TEMP_FAILURE_RETRY, but eg Mac OS' libc doesn't.
 #ifndef TEMP_FAILURE_RETRY
 #define TEMP_FAILURE_RETRY(exp)            \
@@ -114,6 +116,8 @@
   ((sizeof(a) / sizeof(*(a))) / \
     static_cast<size_t>(!(sizeof(a) % sizeof(*(a)))))
 
+#define SIZEOF_MEMBER(t, f) sizeof(std::declval<t>().f)
+
 // Changing this definition will cause you a lot of pain.  A majority of
 // vendor code defines LIKELY and UNLIKELY this way, and includes
 // this header through an indirect path.
diff --git a/base/include/android-base/parseint.h b/base/include/android-base/parseint.h
index 2c8570e..1b7cc5f 100644
--- a/base/include/android-base/parseint.h
+++ b/base/include/android-base/parseint.h
@@ -19,6 +19,7 @@
 
 #include <errno.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include <limits>
 #include <string>
@@ -31,14 +32,20 @@
 // otherwise valid values will be rejected. Returns boolean success; 'out'
 // is untouched if parsing fails.
 template <typename T>
-bool ParseUint(const char* s, T* out,
-               T max = std::numeric_limits<T>::max()) {
+bool ParseUint(const char* s, T* out, T max = std::numeric_limits<T>::max(),
+               bool allow_suffixes = false) {
   int base = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X')) ? 16 : 10;
   errno = 0;
   char* end;
   unsigned long long int result = strtoull(s, &end, base);
-  if (errno != 0 || s == end || *end != '\0') {
-    return false;
+  if (errno != 0 || end == s) return false;
+  if (*end != '\0') {
+    const char* suffixes = "bkmgtpe";
+    const char* suffix;
+    if (!allow_suffixes || (suffix = strchr(suffixes, tolower(*end))) == nullptr) return false;
+#if __clang__  // TODO: win32 still builds with GCC :-(
+    if (__builtin_mul_overflow(result, 1ULL << (10 * (suffix - suffixes)), &result)) return false;
+#endif
   }
   if (max < result) {
     return false;
@@ -49,9 +56,20 @@
 
 // TODO: string_view
 template <typename T>
-bool ParseUint(const std::string& s, T* out,
-               T max = std::numeric_limits<T>::max()) {
-  return ParseUint(s.c_str(), out, max);
+bool ParseUint(const std::string& s, T* out, T max = std::numeric_limits<T>::max(),
+               bool allow_suffixes = false) {
+  return ParseUint(s.c_str(), out, max, allow_suffixes);
+}
+
+template <typename T>
+bool ParseByteCount(const char* s, T* out, T max = std::numeric_limits<T>::max()) {
+  return ParseUint(s, out, max, true);
+}
+
+// TODO: string_view
+template <typename T>
+bool ParseByteCount(const std::string& s, T* out, T max = std::numeric_limits<T>::max()) {
+  return ParseByteCount(s.c_str(), out, max);
 }
 
 // Parses the signed decimal integer in the string 's' and sets 'out' to
diff --git a/base/include/android-base/properties.h b/base/include/android-base/properties.h
index 041586c..3a05143 100644
--- a/base/include/android-base/properties.h
+++ b/base/include/android-base/properties.h
@@ -19,10 +19,6 @@
 
 #include <sys/cdefs.h>
 
-#if !defined(__BIONIC__)
-#error Only bionic supports system properties.
-#endif
-
 #include <chrono>
 #include <limits>
 #include <string>
@@ -62,14 +58,18 @@
 // Waits for the system property `key` to have the value `expected_value`.
 // Times out after `relative_timeout`.
 // Returns true on success, false on timeout.
+#if defined(__BIONIC__)
 bool WaitForProperty(const std::string& key, const std::string& expected_value,
                      std::chrono::milliseconds relative_timeout = std::chrono::milliseconds::max());
+#endif
 
 // Waits for the system property `key` to be created.
 // Times out after `relative_timeout`.
 // Returns true on success, false on timeout.
+#if defined(__BIONIC__)
 bool WaitForPropertyCreation(const std::string& key, std::chrono::milliseconds relative_timeout =
                                                          std::chrono::milliseconds::max());
+#endif
 
 } // namespace base
 } // namespace android
diff --git a/base/include/android-base/test_utils.h b/base/include/android-base/test_utils.h
index 2edafe3..b29676f 100644
--- a/base/include/android-base/test_utils.h
+++ b/base/include/android-base/test_utils.h
@@ -31,6 +31,8 @@
   // Release the ownership of fd, caller is reponsible for closing the
   // fd or stream properly.
   int release();
+  // Don't remove the temporary file in the destructor.
+  void DoNotRemove() { remove_file_ = false; }
 
   int fd;
   char path[1024];
@@ -38,6 +40,8 @@
  private:
   void init(const std::string& tmp_dir);
 
+  bool remove_file_ = true;
+
   DISALLOW_COPY_AND_ASSIGN(TemporaryFile);
 };
 
@@ -54,21 +58,33 @@
   DISALLOW_COPY_AND_ASSIGN(TemporaryDir);
 };
 
-class CapturedStderr {
+class CapturedStdFd {
  public:
-  CapturedStderr();
-  ~CapturedStderr();
+  CapturedStdFd(int std_fd);
+  ~CapturedStdFd();
 
   int fd() const;
+  std::string str();
 
  private:
-  void init();
-  void reset();
+  void Init();
+  void Reset();
 
   TemporaryFile temp_file_;
-  int old_stderr_;
+  int std_fd_;
+  int old_fd_;
 
-  DISALLOW_COPY_AND_ASSIGN(CapturedStderr);
+  DISALLOW_COPY_AND_ASSIGN(CapturedStdFd);
+};
+
+class CapturedStderr : public CapturedStdFd {
+ public:
+  CapturedStderr() : CapturedStdFd(STDERR_FILENO) {}
+};
+
+class CapturedStdout : public CapturedStdFd {
+ public:
+  CapturedStdout() : CapturedStdFd(STDOUT_FILENO) {}
 };
 
 #define ASSERT_MATCH(str, pattern)                                             \
diff --git a/adb/transport_mdns_unsupported.cpp b/base/include/android-base/threads.h
similarity index 70%
rename from adb/transport_mdns_unsupported.cpp
rename to base/include/android-base/threads.h
index 387d341..85e65ba 100644
--- a/adb/transport_mdns_unsupported.cpp
+++ b/base/include/android-base/threads.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2016 The Android Open Source Project
+ * 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.
@@ -14,5 +14,15 @@
  * limitations under the License.
  */
 
-/* For when mDNS discovery is unsupported */
-void init_mdns_transport_discovery(void) {}
+#ifndef ANDROID_BASE_THREADS_H
+#define ANDROID_BASE_THREADS_H
+
+#include <stdint.h>
+
+namespace android {
+namespace base {
+uint64_t GetThreadId();
+}
+}  // namespace android
+
+#endif
diff --git a/base/logging.cpp b/base/logging.cpp
index a31feef..35054ac 100644
--- a/base/logging.cpp
+++ b/base/logging.cpp
@@ -21,6 +21,7 @@
 #include "android-base/logging.h"
 
 #include <fcntl.h>
+#include <inttypes.h>
 #include <libgen.h>
 #include <time.h>
 
@@ -53,50 +54,19 @@
 #endif
 
 #include <android-base/macros.h>
+#include <android-base/parseint.h>
 #include <android-base/strings.h>
+#include <android-base/threads.h>
 
-// For gettid.
-#if defined(__APPLE__)
-#include "AvailabilityMacros.h"  // For MAC_OS_X_VERSION_MAX_ALLOWED
-#include <stdint.h>
-#include <stdlib.h>
-#include <sys/syscall.h>
-#include <sys/time.h>
-#include <unistd.h>
-#elif defined(__linux__) && !defined(__ANDROID__)
-#include <syscall.h>
-#include <unistd.h>
-#elif defined(_WIN32)
-#include <windows.h>
-#endif
+namespace android {
+namespace base {
 
-#if defined(_WIN32)
-typedef uint32_t thread_id;
-#else
-typedef pid_t thread_id;
-#endif
-
-static thread_id GetThreadId() {
-#if defined(__BIONIC__)
-  return gettid();
-#elif defined(__APPLE__)
-  uint64_t tid;
-  pthread_threadid_np(NULL, &tid);
-  return tid;
-#elif defined(__linux__)
-  return syscall(__NR_gettid);
-#elif defined(_WIN32)
-  return GetCurrentThreadId();
-#endif
-}
-
-namespace {
+// BSD-based systems like Android/macOS have getprogname(). Others need us to provide one.
+#if defined(__GLIBC__) || defined(_WIN32)
+static const char* getprogname() {
 #if defined(__GLIBC__)
-const char* getprogname() {
   return program_invocation_short_name;
-}
 #elif defined(_WIN32)
-const char* getprogname() {
   static bool first = true;
   static char progname[MAX_PATH] = {};
 
@@ -113,12 +83,42 @@
   }
 
   return progname;
+#endif
 }
 #endif
-} // namespace
 
-namespace android {
-namespace base {
+static const char* GetFileBasename(const char* file) {
+  // We can't use basename(3) even on Unix because the Mac doesn't
+  // have a non-modifying basename.
+  const char* last_slash = strrchr(file, '/');
+  if (last_slash != nullptr) {
+    return last_slash + 1;
+  }
+#if defined(_WIN32)
+  const char* last_backslash = strrchr(file, '\\');
+  if (last_backslash != nullptr) {
+    return last_backslash + 1;
+  }
+#endif
+  return file;
+}
+
+#if defined(__linux__)
+static int OpenKmsg() {
+#if defined(__ANDROID__)
+  // pick up 'file w /dev/kmsg' environment from daemon's init rc file
+  const auto val = getenv("ANDROID_FILE__dev_kmsg");
+  if (val != nullptr) {
+    int fd;
+    if (android::base::ParseInt(val, &fd, 0)) {
+      auto flags = fcntl(fd, F_GETFL);
+      if ((flags != -1) && ((flags & O_ACCMODE) == O_WRONLY)) return fd;
+    }
+  }
+#endif
+  return TEMP_FAILURE_RETRY(open("/dev/kmsg", O_WRONLY | O_CLOEXEC));
+}
+#endif
 
 static std::mutex& LoggingLock() {
   static auto& logging_lock = *new std::mutex();
@@ -183,7 +183,7 @@
   static_assert(arraysize(kLogSeverityToKernelLogLevel) == android::base::FATAL + 1,
                 "Mismatch in size of kLogSeverityToKernelLogLevel and values in LogSeverity");
 
-  static int klog_fd = TEMP_FAILURE_RETRY(open("/dev/kmsg", O_WRONLY | O_CLOEXEC));
+  static int klog_fd = OpenKmsg();
   if (klog_fd == -1) return;
 
   int level = kLogSeverityToKernelLogLevel[severity];
@@ -223,8 +223,18 @@
   static_assert(arraysize(log_characters) - 1 == FATAL + 1,
                 "Mismatch in size of log_characters and values in LogSeverity");
   char severity_char = log_characters[severity];
-  fprintf(stderr, "%s %c %s %5d %5d %s:%u] %s\n", tag ? tag : "nullptr", severity_char, timestamp,
-          getpid(), GetThreadId(), file, line, message);
+  fprintf(stderr, "%s %c %s %5d %5" PRIu64 " %s:%u] %s\n", tag ? tag : "nullptr", severity_char,
+          timestamp, getpid(), GetThreadId(), file, line, message);
+}
+
+void StdioLogger(LogId, LogSeverity severity, const char* /*tag*/, const char* /*file*/,
+                 unsigned int /*line*/, const char* message) {
+  if (severity >= WARNING) {
+    fflush(stdout);
+    fprintf(stderr, "%s: %s\n", GetFileBasename(getprogname()), message);
+  } else {
+    fprintf(stdout, "%s\n", message);
+  }
 }
 
 void DefaultAborter(const char* abort_message) {
@@ -341,22 +351,6 @@
   Aborter() = std::move(aborter);
 }
 
-static const char* GetFileBasename(const char* file) {
-  // We can't use basename(3) even on Unix because the Mac doesn't
-  // have a non-modifying basename.
-  const char* last_slash = strrchr(file, '/');
-  if (last_slash != nullptr) {
-    return last_slash + 1;
-  }
-#if defined(_WIN32)
-  const char* last_backslash = strrchr(file, '\\');
-  if (last_backslash != nullptr) {
-    return last_backslash + 1;
-  }
-#endif
-  return file;
-}
-
 // This indirection greatly reduces the stack impact of having lots of
 // checks/logging in a function.
 class LogMessageData {
diff --git a/base/logging_test.cpp b/base/logging_test.cpp
index 5f689fa..75b4ea0 100644
--- a/base/logging_test.cpp
+++ b/base/logging_test.cpp
@@ -206,11 +206,9 @@
 }
 #endif
 
-static void CheckMessage(const CapturedStderr& cap, android::base::LogSeverity severity,
+static void CheckMessage(CapturedStderr& cap, android::base::LogSeverity severity,
                          const char* expected, const char* expected_tag = nullptr) {
-  std::string output;
-  ASSERT_EQ(0, lseek(cap.fd(), 0, SEEK_SET));
-  android::base::ReadFdToString(cap.fd(), &output);
+  std::string output = cap.str();
 
   // We can't usefully check the output of any of these on Windows because we
   // don't have std::regex, but we can at least make sure we printed at least as
@@ -623,3 +621,23 @@
   }
   CheckMessage(cap, android::base::LogSeverity::INFO, expected_msg, expected_tag);
 }
+
+TEST(logging, StdioLogger) {
+  std::string err_str;
+  std::string out_str;
+  {
+    CapturedStderr cap_err;
+    CapturedStdout cap_out;
+    android::base::SetLogger(android::base::StdioLogger);
+    LOG(INFO) << "out";
+    LOG(ERROR) << "err";
+    err_str = cap_err.str();
+    out_str = cap_out.str();
+  }
+
+  // For INFO we expect just the literal "out\n".
+  ASSERT_EQ("out\n", out_str) << out_str;
+  // Whereas ERROR logging includes the program name.
+  ASSERT_EQ(android::base::Basename(android::base::GetExecutablePath()) + ": err\n", err_str)
+      << err_str;
+}
diff --git a/adb/transport_mdns_unsupported.cpp b/base/macros_test.cpp
similarity index 64%
copy from adb/transport_mdns_unsupported.cpp
copy to base/macros_test.cpp
index 387d341..2b522db 100644
--- a/adb/transport_mdns_unsupported.cpp
+++ b/base/macros_test.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2016 The Android Open Source Project
+ * 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.
@@ -14,5 +14,17 @@
  * limitations under the License.
  */
 
-/* For when mDNS discovery is unsupported */
-void init_mdns_transport_discovery(void) {}
+#include "android-base/macros.h"
+
+#include <stdint.h>
+
+#include <gtest/gtest.h>
+
+TEST(macros, SIZEOF_MEMBER_macro) {
+  struct S {
+    int32_t i32;
+    double d;
+  };
+  ASSERT_EQ(4U, SIZEOF_MEMBER(S, i32));
+  ASSERT_EQ(8U, SIZEOF_MEMBER(S, d));
+}
diff --git a/base/parseint_test.cpp b/base/parseint_test.cpp
index 483b1d3..fb1c339 100644
--- a/base/parseint_test.cpp
+++ b/base/parseint_test.cpp
@@ -96,3 +96,44 @@
   ASSERT_FALSE(android::base::ParseInt("456x", &u));
   ASSERT_EQ(123u, u);
 }
+
+TEST(parseint, ParseByteCount) {
+  uint64_t i = 0;
+  ASSERT_TRUE(android::base::ParseByteCount("123b", &i));
+  ASSERT_EQ(123ULL, i);
+
+  ASSERT_TRUE(android::base::ParseByteCount("8k", &i));
+  ASSERT_EQ(8ULL * 1024, i);
+
+  ASSERT_TRUE(android::base::ParseByteCount("8M", &i));
+  ASSERT_EQ(8ULL * 1024 * 1024, i);
+
+  ASSERT_TRUE(android::base::ParseByteCount("6g", &i));
+  ASSERT_EQ(6ULL * 1024 * 1024 * 1024, i);
+
+  ASSERT_TRUE(android::base::ParseByteCount("1T", &i));
+  ASSERT_EQ(1ULL * 1024 * 1024 * 1024 * 1024, i);
+
+  ASSERT_TRUE(android::base::ParseByteCount("2p", &i));
+  ASSERT_EQ(2ULL * 1024 * 1024 * 1024 * 1024 * 1024, i);
+
+  ASSERT_TRUE(android::base::ParseByteCount("4e", &i));
+  ASSERT_EQ(4ULL * 1024 * 1024 * 1024 * 1024 * 1024 * 1024, i);
+}
+
+TEST(parseint, ParseByteCount_invalid_suffix) {
+  unsigned u;
+  ASSERT_FALSE(android::base::ParseByteCount("1x", &u));
+}
+
+TEST(parseint, ParseByteCount_overflow) {
+  uint64_t u64;
+  ASSERT_FALSE(android::base::ParseByteCount("4294967295E", &u64));
+
+  uint16_t u16;
+  ASSERT_TRUE(android::base::ParseByteCount("63k", &u16));
+  ASSERT_EQ(63U * 1024, u16);
+  ASSERT_TRUE(android::base::ParseByteCount("65535b", &u16));
+  ASSERT_EQ(65535U, u16);
+  ASSERT_FALSE(android::base::ParseByteCount("65k", &u16));
+}
diff --git a/base/properties.cpp b/base/properties.cpp
index 6cf43f9..d5a5918 100644
--- a/base/properties.cpp
+++ b/base/properties.cpp
@@ -14,16 +14,18 @@
  * limitations under the License.
  */
 
-#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
-
 #include "android-base/properties.h"
 
+#if defined(__BIONIC__)
+#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
 #include <sys/system_properties.h>
 #include <sys/_system_properties.h>
+#endif
 
 #include <algorithm>
 #include <chrono>
 #include <limits>
+#include <map>
 #include <string>
 
 #include <android-base/parseint.h>
@@ -31,24 +33,6 @@
 namespace android {
 namespace base {
 
-std::string GetProperty(const std::string& key, const std::string& default_value) {
-  const prop_info* pi = __system_property_find(key.c_str());
-  if (pi == nullptr) return default_value;
-
-  std::string property_value;
-  __system_property_read_callback(pi,
-                                  [](void* cookie, const char*, const char* value, unsigned) {
-                                    auto property_value = reinterpret_cast<std::string*>(cookie);
-                                    *property_value = value;
-                                  },
-                                  &property_value);
-
-  // If the property exists but is empty, also return the default value.
-  // Since we can't remove system properties, "empty" is traditionally
-  // the same as "missing" (this was true for cutils' property_get).
-  return property_value.empty() ? default_value : property_value;
-}
-
 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") {
@@ -85,10 +69,43 @@
 template uint32_t GetUintProperty(const std::string&, uint32_t, uint32_t);
 template uint64_t GetUintProperty(const std::string&, uint64_t, uint64_t);
 
+#if !defined(__BIONIC__)
+static std::map<std::string, std::string>& g_properties = *new std::map<std::string, std::string>;
+static int __system_property_set(const char* key, const char* value) {
+  g_properties[key] = value;
+  return 0;
+}
+#endif
+
+std::string GetProperty(const std::string& key, const std::string& default_value) {
+  std::string property_value;
+#if defined(__BIONIC__)
+  const prop_info* pi = __system_property_find(key.c_str());
+  if (pi == nullptr) return default_value;
+
+  __system_property_read_callback(pi,
+                                  [](void* cookie, const char*, const char* value, unsigned) {
+                                    auto property_value = reinterpret_cast<std::string*>(cookie);
+                                    *property_value = value;
+                                  },
+                                  &property_value);
+#else
+  auto it = g_properties.find(key);
+  if (it == g_properties.end()) return default_value;
+  property_value = it->second;
+#endif
+  // If the property exists but is empty, also return the default value.
+  // Since we can't remove system properties, "empty" is traditionally
+  // the same as "missing" (this was true for cutils' property_get).
+  return property_value.empty() ? default_value : property_value;
+}
+
 bool SetProperty(const std::string& key, const std::string& value) {
   return (__system_property_set(key.c_str(), value.c_str()) == 0);
 }
 
+#if defined(__BIONIC__)
+
 struct WaitForPropertyData {
   bool done;
   const std::string* expected_value;
@@ -175,5 +192,7 @@
   return (WaitForPropertyCreation(key, relative_timeout, start_time) != nullptr);
 }
 
+#endif
+
 }  // namespace base
 }  // namespace android
diff --git a/base/properties_test.cpp b/base/properties_test.cpp
index de5f3dc..e7d4880 100644
--- a/base/properties_test.cpp
+++ b/base/properties_test.cpp
@@ -23,7 +23,9 @@
 #include <string>
 #include <thread>
 
-using namespace std::chrono_literals;
+#if !defined(_WIN32)
+using namespace std::literals;
+#endif
 
 TEST(properties, smoke) {
   android::base::SetProperty("debug.libbase.property_test", "hello");
@@ -126,6 +128,7 @@
 TEST(properties, GetUintProperty_uint64_t) { CheckGetUintProperty<uint64_t>(); }
 
 TEST(properties, WaitForProperty) {
+#if defined(__BIONIC__)
   std::atomic<bool> flag{false};
   std::thread thread([&]() {
     std::this_thread::sleep_for(100ms);
@@ -138,9 +141,13 @@
   flag = true;
   ASSERT_TRUE(android::base::WaitForProperty("debug.libbase.WaitForProperty_test", "b", 1s));
   thread.join();
+#else
+  GTEST_LOG_(INFO) << "This test does nothing on the host.\n";
+#endif
 }
 
 TEST(properties, WaitForProperty_timeout) {
+#if defined(__BIONIC__)
   auto t0 = std::chrono::steady_clock::now();
   ASSERT_FALSE(android::base::WaitForProperty("debug.libbase.WaitForProperty_timeout_test", "a",
                                               200ms));
@@ -149,9 +156,13 @@
   ASSERT_GE(std::chrono::duration_cast<std::chrono::milliseconds>(t1 - t0), 200ms);
   // Upper bounds on timing are inherently flaky, but let's try...
   ASSERT_LT(std::chrono::duration_cast<std::chrono::milliseconds>(t1 - t0), 600ms);
+#else
+  GTEST_LOG_(INFO) << "This test does nothing on the host.\n";
+#endif
 }
 
 TEST(properties, WaitForProperty_MaxTimeout) {
+#if defined(__BIONIC__)
   std::atomic<bool> flag{false};
   std::thread thread([&]() {
     android::base::SetProperty("debug.libbase.WaitForProperty_test", "a");
@@ -165,9 +176,13 @@
   // Test that this does not immediately return false due to overflow issues with the timeout.
   ASSERT_TRUE(android::base::WaitForProperty("debug.libbase.WaitForProperty_test", "b"));
   thread.join();
+#else
+  GTEST_LOG_(INFO) << "This test does nothing on the host.\n";
+#endif
 }
 
 TEST(properties, WaitForProperty_NegativeTimeout) {
+#if defined(__BIONIC__)
   std::atomic<bool> flag{false};
   std::thread thread([&]() {
     android::base::SetProperty("debug.libbase.WaitForProperty_test", "a");
@@ -181,9 +196,13 @@
   // Assert that this immediately returns with a negative timeout
   ASSERT_FALSE(android::base::WaitForProperty("debug.libbase.WaitForProperty_test", "b", -100ms));
   thread.join();
+#else
+  GTEST_LOG_(INFO) << "This test does nothing on the host.\n";
+#endif
 }
 
 TEST(properties, WaitForPropertyCreation) {
+#if defined(__BIONIC__)
   std::thread thread([&]() {
     std::this_thread::sleep_for(100ms);
     android::base::SetProperty("debug.libbase.WaitForPropertyCreation_test", "a");
@@ -192,9 +211,13 @@
   ASSERT_TRUE(android::base::WaitForPropertyCreation(
           "debug.libbase.WaitForPropertyCreation_test", 1s));
   thread.join();
+#else
+  GTEST_LOG_(INFO) << "This test does nothing on the host.\n";
+#endif
 }
 
 TEST(properties, WaitForPropertyCreation_timeout) {
+#if defined(__BIONIC__)
   auto t0 = std::chrono::steady_clock::now();
   ASSERT_FALSE(android::base::WaitForPropertyCreation(
           "debug.libbase.WaitForPropertyCreation_timeout_test", 200ms));
@@ -203,4 +226,7 @@
   ASSERT_GE(std::chrono::duration_cast<std::chrono::milliseconds>(t1 - t0), 200ms);
   // Upper bounds on timing are inherently flaky, but let's try...
   ASSERT_LT(std::chrono::duration_cast<std::chrono::milliseconds>(t1 - t0), 600ms);
+#else
+  GTEST_LOG_(INFO) << "This test does nothing on the host.\n";
+#endif
 }
diff --git a/base/test_utils.cpp b/base/test_utils.cpp
index 9d8dfb2..5096369 100644
--- a/base/test_utils.cpp
+++ b/base/test_utils.cpp
@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-#include "android-base/logging.h"
 #include "android-base/test_utils.h"
 
 #include <fcntl.h>
@@ -33,6 +32,9 @@
 
 #include <string>
 
+#include <android-base/file.h>
+#include <android-base/logging.h>
+
 #ifdef _WIN32
 int mkstemp(char* template_name) {
   if (_mktemp(template_name) == nullptr) {
@@ -92,7 +94,9 @@
   if (fd != -1) {
     close(fd);
   }
-  unlink(path);
+  if (remove_file_) {
+    unlink(path);
+  }
 }
 
 int TemporaryFile::release() {
@@ -121,31 +125,38 @@
   return (mkdtemp(path) != nullptr);
 }
 
-CapturedStderr::CapturedStderr() : old_stderr_(-1) {
-  init();
+CapturedStdFd::CapturedStdFd(int std_fd) : std_fd_(std_fd), old_fd_(-1) {
+  Init();
 }
 
-CapturedStderr::~CapturedStderr() {
-  reset();
+CapturedStdFd::~CapturedStdFd() {
+  Reset();
 }
 
-int CapturedStderr::fd() const {
+int CapturedStdFd::fd() const {
   return temp_file_.fd;
 }
 
-void CapturedStderr::init() {
+std::string CapturedStdFd::str() {
+  std::string result;
+  CHECK_EQ(0, TEMP_FAILURE_RETRY(lseek(fd(), 0, SEEK_SET)));
+  android::base::ReadFdToString(fd(), &result);
+  return result;
+}
+
+void CapturedStdFd::Init() {
 #if defined(_WIN32)
   // On Windows, stderr is often buffered, so make sure it is unbuffered so
   // that we can immediately read back what was written to stderr.
-  CHECK_EQ(0, setvbuf(stderr, NULL, _IONBF, 0));
+  if (std_fd_ == STDERR_FILENO) CHECK_EQ(0, setvbuf(stderr, NULL, _IONBF, 0));
 #endif
-  old_stderr_ = dup(STDERR_FILENO);
-  CHECK_NE(-1, old_stderr_);
-  CHECK_NE(-1, dup2(fd(), STDERR_FILENO));
+  old_fd_ = dup(std_fd_);
+  CHECK_NE(-1, old_fd_);
+  CHECK_NE(-1, dup2(fd(), std_fd_));
 }
 
-void CapturedStderr::reset() {
-  CHECK_NE(-1, dup2(old_stderr_, STDERR_FILENO));
-  CHECK_EQ(0, close(old_stderr_));
+void CapturedStdFd::Reset() {
+  CHECK_NE(-1, dup2(old_fd_, std_fd_));
+  CHECK_EQ(0, close(old_fd_));
   // Note: cannot restore prior setvbuf() setting.
 }
diff --git a/base/threads.cpp b/base/threads.cpp
new file mode 100644
index 0000000..a71382b
--- /dev/null
+++ b/base/threads.cpp
@@ -0,0 +1,48 @@
+/*
+ * 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/threads.h>
+
+#include <stdint.h>
+#include <unistd.h>
+
+#if defined(__APPLE__)
+#include <pthread.h>
+#elif defined(__linux__) && !defined(__ANDROID__)
+#include <syscall.h>
+#elif defined(_WIN32)
+#include <windows.h>
+#endif
+
+namespace android {
+namespace base {
+
+uint64_t GetThreadId() {
+#if defined(__BIONIC__)
+  return gettid();
+#elif defined(__APPLE__)
+  uint64_t tid;
+  pthread_threadid_np(NULL, &tid);
+  return tid;
+#elif defined(__linux__)
+  return syscall(__NR_gettid);
+#elif defined(_WIN32)
+  return GetCurrentThreadId();
+#endif
+}
+
+}  // namespace base
+}  // namespace android
diff --git a/bootstat/Android.bp b/bootstat/Android.bp
index 3ddadbc..5e2d171 100644
--- a/bootstat/Android.bp
+++ b/bootstat/Android.bp
@@ -64,7 +64,6 @@
     defaults: ["bootstat_defaults"],
     static_libs: ["libbootstat"],
     shared_libs: [
-        "liblogcat",
         "libstatslog"
     ],
     init_rc: ["bootstat.rc"],
diff --git a/bootstat/boot_reason_test.sh b/bootstat/boot_reason_test.sh
index 79702a6..ddd1caf 100755
--- a/bootstat/boot_reason_test.sh
+++ b/bootstat/boot_reason_test.sh
@@ -239,6 +239,8 @@
   return 0
 }
 
+BAD_BOOTLOADER_REASON=
+
 [ "USAGE: EXPECT_PROPERTY <prop> <value> [--allow_failure]
 
 Returns true (0) if current return (regex) value is true and the result matches
@@ -249,9 +251,20 @@
   value="${2}"
   shift 2
   val=`adb shell getprop ${property} 2>&1`
-  EXPECT_EQ "${value}" "${val}" for Android property ${property} ||
-    [ -n "${1}" ] ||
-    save_ret=${?}
+  EXPECT_EQ "${value}" "${val}" for Android property ${property}
+  local_ret=${?}
+  if [ 0 != ${local_ret} -a "ro.boot.bootreason" = "${property}" ]; then
+    if [ -z "${BAD_BOOTLOADER_REASON}" ]; then
+      BAD_BOOTLOADER_REASON=${val}
+    elif [ X"${BAD_BOOTLOADER_REASON}" = X"${val}" ]; then
+      local_ret=0
+    fi
+  fi
+  if [ 0 != ${local_ret} ]; then
+    if [ -z "${1}" ] ; then
+      save_ret=${local_ret}
+    fi
+  fi
   return ${save_ret}
 }
 
@@ -287,6 +300,7 @@
 bootstat: Service started: /system/bin/bootstat --record_boot_reason
 bootstat: Service started: /system/bin/bootstat --record_time_since_factory_reset
 bootstat: Service started: /system/bin/bootstat -l
+bootstat: Service started: /system/bin/bootstat --set_system_boot_reason --record_boot_complete --record_boot_reason --record_time_since_factory_reset -l
 bootstat: Battery level at shutdown 100%
 bootstat: Battery level at startup 100%
 init    : Parsing file /system/etc/init/bootstat.rc...
@@ -298,6 +312,7 @@
 init    : processing action (ro.boot.bootreason=*) from (/system/etc/init/bootstat.rc
 init    : processing action (sys.boot_completed=1 && sys.logbootcomplete=1) from (/system/etc/init/bootstat.rc
  (/system/bin/bootstat --record_boot_complete --record_boot_reason --record_time_since_factory_reset -l)'
+ (/system/bin/bootstat --set_system_boot_reason --record_boot_complete --record_boot_reason --record_time_since_factory_reset -l)'
  (/system/bin/bootstat -r post_decrypt_time_elapsed)'
 init    : Command 'exec - system log -- /system/bin/bootstat --record_boot_complete' action=sys.boot_completed=1 && sys.logbootcomplete=1 (/system/etc/init/bootstat.rc:
 init    : Command 'exec - system log -- /system/bin/bootstat --record_boot_reason' action=sys.boot_completed=1 && sys.logbootcomplete=1 (/system/etc/init/bootstat.rc:
@@ -407,29 +422,35 @@
        tr ' \f\t\r\n' '_____'`
   case ${var} in
     watchdog | watchdog,?* ) ;;
-    kernel_panic | kernel_panic,?*) ;;
-    recovery | recovery,?*) ;;
-    bootloader | bootloader,?*) ;;
-    cold | cold,?*) ;;
-    hard | hard,?*) ;;
-    warm | warm,?*) ;;
-    shutdown | shutdown,?*) ;;
+    kernel_panic | kernel_panic,?* ) ;;
+    recovery | recovery,?* ) ;;
+    bootloader | bootloader,?* ) ;;
+    cold | cold,?* ) ;;
+    hard | hard,?* ) ;;
+    warm | warm,?* ) ;;
+    shutdown | shutdown,?* ) ;;
     reboot,reboot | reboot,reboot,* )     var=${var#reboot,} ; var=${var%,} ;;
     reboot,cold | reboot,cold,* )         var=${var#reboot,} ; var=${var%,} ;;
     reboot,hard | reboot,hard,* )         var=${var#reboot,} ; var=${var%,} ;;
     reboot,warm | reboot,warm,* )         var=${var#reboot,} ; var=${var%,} ;;
     reboot,recovery | reboot,recovery,* ) var=${var#reboot,} ; var=${var%,} ;;
     reboot,bootloader | reboot,bootloader,* ) var=${var#reboot,} ; var=${var%,} ;;
-    reboot | reboot,?*) ;;
+    reboot | reboot,?* ) ;;
     # Aliases and Heuristics
-    *wdog* | *watchdog* )     var="watchdog" ;;
-    *powerkey* )              var="cold,powerkey" ;;
-    *panic* | *kernel_panic*) var="kernel_panic" ;;
-    *thermal*)                var="shutdown,thermal" ;;
-    *s3_wakeup*)              var="warm,s3_wakeup" ;;
-    *hw_reset*)               var="hard,hw_reset" ;;
-    *bootloader*)             var="bootloader" ;;
-    *)                        var="reboot" ;;
+    *wdog* | *watchdog* )                   var="watchdog" ;;
+    *powerkey* | *power_key* | *PowerKey* ) var="cold,powerkey" ;;
+    *panic* | *kernel_panic* )              var="kernel_panic" ;;
+    *thermal* )                             var="shutdown,thermal" ;;
+    *s3_wakeup* )                           var="warm,s3_wakeup" ;;
+    *hw_reset* )                            var="hard,hw_reset" ;;
+    *usb* )                                 var="cold,charger" ;;
+    *rtc* )                                 var="cold,rtc" ;;
+    *2sec_reboot* )                         var="cold,rtc,2sec" ;;
+    *wdt_by_pass_pwk* )                     var="warm" ;;
+    wdt )                                   var="reboot" ;;
+    *tool_by_pass_pwk* )                    var="reboot,tool" ;;
+    *bootloader* )                          var="bootloader" ;;
+    * )                                     var="reboot" ;;
   esac
   echo ${var}
 }
@@ -459,23 +480,25 @@
 - (wait until screen is up, boot has completed)
 - adb shell getprop ro.boot.bootreason (bootloader reason)
 - adb shell getprop persist.sys.boot.reason (last reason)
+- adb shell getprop sys.boot.reason.last (last last reason)
 - adb shell getprop sys.boot.reason (system reason)
 - NB: all should have a value that is compliant with our known set." ]
 test_properties() {
   duration_test 1
   wait_for_screen
   retval=0
-  check_set="ro.boot.bootreason persist.sys.boot.reason sys.boot.reason"
+  check_set="ro.boot.bootreason sys.boot.reason.last sys.boot.reason"
   bootloader=""
   # NB: this test could fail if performed _after_ optional_factory_reset test
   # and will report
   #  ERROR: expected "reboot" got ""
-  #        for Android property persist.sys.boot.reason
+  #        for Android property sys.boot.reason.last
   # following is mitigation for the persist.sys.boot.reason, skip it
   if [ "reboot,factory_reset" = "`validate_property ro.boot_bootreason`" ]; then
     check_set="ro.boot.bootreason sys.boot.reason"
     bootloader="bootloader"
   fi
+  EXPECT_PROPERTY persist.sys.boot.reason ""
   for prop in ${check_set}; do
     reason=`validate_property ${prop}`
     EXPECT_PROPERTY ${prop} ${reason} || retval=${?}
@@ -533,7 +556,8 @@
   popd >&2
   wait_for_screen
   EXPECT_PROPERTY sys.boot.reason "\(reboot,ota\|bootloader\)"
-  EXPECT_PROPERTY persist.sys.boot.reason bootloader
+  EXPECT_PROPERTY sys.boot.reason.last bootloader
+  EXPECT_PROPERTY persist.sys.boot.reason ""
   report_bootstat_logs reboot,ota bootloader
 }
 
@@ -547,7 +571,8 @@
   adb reboot ota
   wait_for_screen
   EXPECT_PROPERTY sys.boot.reason reboot,ota
-  EXPECT_PROPERTY persist.sys.boot.reason reboot,ota
+  EXPECT_PROPERTY sys.boot.reason.last reboot,ota
+  EXPECT_PROPERTY persist.sys.boot.reason ""
   report_bootstat_logs reboot,ota
 }
 
@@ -566,15 +591,21 @@
   duration_test
   case ${TEST} in
     bootloader | recovery | cold | hard | warm ) reason=${TEST} ;;
-    *)                                           reason=reboot,${TEST} ;;
+    *)                                           reason=reboot,${TEST#optional_} ;;
   esac
-  adb reboot ${TEST}
+  adb reboot ${TEST#optional_}
   wait_for_screen
   bootloader_reason=`validate_property ro.boot.bootreason`
   EXPECT_PROPERTY ro.boot.bootreason ${bootloader_reason}
-  EXPECT_PROPERTY sys.boot.reason ${reason}
-  EXPECT_PROPERTY persist.sys.boot.reason ${reason}
-  report_bootstat_logs ${reason}
+  # to make sys.boot.reason report user friendly
+  reasons=${reason}
+  if [ "${bootloader_reason}" != "${reason}" -a -n "${bootloader_reason}" ]; then
+    reasons="\(${reason}\|${bootloader_reason}\)"
+  fi
+  EXPECT_PROPERTY sys.boot.reason ${reasons}
+  EXPECT_PROPERTY sys.boot.reason.last ${reason}
+  EXPECT_PROPERTY persist.sys.boot.reason ""
+  report_bootstat_logs ${reason} ${bootloader_reason}
 }
 
 [ "USAGE: test_cold
@@ -606,7 +637,8 @@
   adb reboot >&2
   wait_for_screen
   EXPECT_PROPERTY sys.boot.reason reboot,factory_reset
-  EXPECT_PROPERTY persist.sys.boot.reason "reboot,.*"
+  EXPECT_PROPERTY sys.boot.reason.last "reboot,.*"
+  EXPECT_PROPERTY persist.sys.boot.reason ""
   report_bootstat_logs reboot,factory_reset reboot, reboot,adb \
     "-bootstat: Failed to read /data/misc/bootstat/build_date: No such file or directory" \
     "-bootstat: Failed to parse boot time record: /data/misc/bootstat/build_date"
@@ -637,6 +669,7 @@
   wait_for_screen
   ( exit ${save_ret} )  # because one can not just do ?=${save_ret}
   EXPECT_PROPERTY sys.boot.reason reboot,factory_reset
+  EXPECT_PROPERTY sys.boot.reason.last ""
   EXPECT_PROPERTY persist.sys.boot.reason ""
   report_bootstat_logs reboot,factory_reset bootloader \
     "-bootstat: Failed to read /data/misc/bootstat/last_boot_time_utc: No such file or directory" \
@@ -710,7 +743,8 @@
     )
 
   EXPECT_PROPERTY sys.boot.reason shutdown,battery
-  EXPECT_PROPERTY persist.sys.boot.reason cold
+  EXPECT_PROPERTY sys.boot.reason.last cold
+  EXPECT_PROPERTY persist.sys.boot.reason ""
   report_bootstat_logs shutdown,battery "-bootstat: Battery level at shutdown 2%"
   exitPstore
 }
@@ -731,7 +765,8 @@
   echo -n "WARNING: Please power device back up, waiting ... " >&2
   wait_for_screen -n >&2
   EXPECT_PROPERTY sys.boot.reason shutdown,battery
-  EXPECT_PROPERTY persist.sys.boot.reason shutdown,battery
+  EXPECT_PROPERTY sys.boot.reason.last shutdown,battery
+  EXPECT_PROPERTY persist.sys.boot.reason ""
   report_bootstat_logs shutdown,battery
 }
 
@@ -751,7 +786,8 @@
   echo -n "WARNING: Please power device back up, waiting ... " >&2
   wait_for_screen -n >&2
   EXPECT_PROPERTY sys.boot.reason shutdown,thermal,battery
-  EXPECT_PROPERTY persist.sys.boot.reason shutdown,thermal,battery
+  EXPECT_PROPERTY sys.boot.reason.last shutdown,thermal,battery
+  EXPECT_PROPERTY persist.sys.boot.reason ""
   report_bootstat_logs shutdown,thermal,battery
 }
 
@@ -787,11 +823,71 @@
   echo c | adb shell su root tee /proc/sysrq-trigger >/dev/null
   wait_for_screen
   EXPECT_PROPERTY sys.boot.reason ${panic_msg}
-  EXPECT_PROPERTY persist.sys.boot.reason ${panic_msg}
+  EXPECT_PROPERTY sys.boot.reason.last ${panic_msg}
+  EXPECT_PROPERTY persist.sys.boot.reason ""
   report_bootstat_logs kernel_panic,sysrq
   exitPstore
 }
 
+[ "USAGE: test_kernel_panic_subreason
+
+kernel_panic_subreason test:
+- echo SysRq : Trigger a crash : 'test' | adb shell su root tee /dev/kmsg
+- echo c | adb shell su root tee /proc/sysrq-trigger
+- (wait until screen is up, boot has completed)
+- adb shell getprop sys.boot.reason
+- NB: should report kernel_panic,sysrq,test" ]
+test_kernel_panic_subreason() {
+  checkDebugBuild || return
+  duration_test ">90"
+  panic_msg="kernel_panic,sysrq,test"
+  enterPstore
+  if [ ${?} != 0 ]; then
+    echo "         or functional bootloader" >&2
+    panic_msg="\(kernel_panic,sysrq,test\|kernel_panic\)"
+    pstore_ok=true
+  fi
+  echo "SysRq : Trigger a crash : 'test'" | adb shell su root tee /dev/kmsg
+  echo c | adb shell su root tee /proc/sysrq-trigger >/dev/null
+  wait_for_screen
+  EXPECT_PROPERTY sys.boot.reason ${panic_msg}
+  EXPECT_PROPERTY sys.boot.reason.last ${panic_msg}
+  EXPECT_PROPERTY persist.sys.boot.reason ""
+  report_bootstat_logs kernel_panic,sysrq,test \
+    "-bootstat: Unknown boot reason: kernel_panic,sysrq,test"
+  exitPstore
+}
+
+[ "USAGE: test_kernel_panic_hung
+
+kernel_panic_hung test:
+- echo Kernel panic - not synching: hung_task: blocked tasks |
+  adb shell su root tee /dev/kmsg
+- adb reboot warm
+- (wait until screen is up, boot has completed)
+- adb shell getprop sys.boot.reason
+- NB: should report kernel_panic,hung" ]
+test_kernel_panic_hung() {
+  checkDebugBuild || return
+  duration_test
+  panic_msg="kernel_panic,hung"
+  enterPstore
+  if [ ${?} != 0 ]; then
+    echo "         or functional bootloader" >&2
+    panic_msg="\(kernel_panic,hung\|reboot,hung\)"
+    pstore_ok=true
+  fi
+  echo "Kernel panic - not syncing: hung_task: blocked tasks" |
+    adb shell su root tee /dev/kmsg
+  adb reboot warm
+  wait_for_screen
+  EXPECT_PROPERTY sys.boot.reason ${panic_msg}
+  EXPECT_PROPERTY sys.boot.reason.last ${panic_msg}
+  EXPECT_PROPERTY persist.sys.boot.reason ""
+  report_bootstat_logs kernel_panic,hung
+  exitPstore
+}
+
 [ "USAGE: test_warm
 
 warm test
@@ -819,7 +915,8 @@
   echo -n "WARNING: Please power device back up, waiting ... " >&2
   wait_for_screen -n >&2
   EXPECT_PROPERTY sys.boot.reason shutdown,thermal
-  EXPECT_PROPERTY persist.sys.boot.reason shutdown,thermal
+  EXPECT_PROPERTY sys.boot.reason.last shutdown,thermal
+  EXPECT_PROPERTY persist.sys.boot.reason ""
   report_bootstat_logs shutdown,thermal
 }
 
@@ -839,7 +936,8 @@
   echo -n "WARNING: Please power device back up, waiting ... " >&2
   wait_for_screen -n >&2
   EXPECT_PROPERTY sys.boot.reason shutdown,userrequested
-  EXPECT_PROPERTY persist.sys.boot.reason shutdown,userrequested
+  EXPECT_PROPERTY sys.boot.reason.last shutdown,userrequested
+  EXPECT_PROPERTY persist.sys.boot.reason ""
   report_bootstat_logs shutdown,userrequested
 }
 
@@ -855,7 +953,8 @@
   adb shell reboot
   wait_for_screen
   EXPECT_PROPERTY sys.boot.reason reboot,shell
-  EXPECT_PROPERTY persist.sys.boot.reason reboot,shell
+  EXPECT_PROPERTY sys.boot.reason.last reboot,shell
+  EXPECT_PROPERTY persist.sys.boot.reason ""
   report_bootstat_logs reboot,shell
 }
 
@@ -871,10 +970,25 @@
   adb reboot
   wait_for_screen
   EXPECT_PROPERTY sys.boot.reason reboot,adb
-  EXPECT_PROPERTY persist.sys.boot.reason reboot,adb
+  EXPECT_PROPERTY sys.boot.reason.last reboot,adb
+  EXPECT_PROPERTY persist.sys.boot.reason ""
   report_bootstat_logs reboot,adb
 }
 
+[ "USAGE: test_rescueparty
+
+rescueparty test
+- adb reboot rescueparty
+- (wait until screen is up, boot has completed)
+- adb shell getprop sys.boot.reason
+- adb shell getprop ro.boot.bootreason
+- NB: should report reboot,rescueparty" ]
+test_optional_rescueparty() {
+  blind_reboot_test
+  echo "WARNING: legacy devices are allowed to fail following ro.boot.bootreason result" >&2
+  EXPECT_PROPERTY ro.boot.bootreason reboot,rescueparty
+}
+
 [ "USAGE: test_Its_Just_So_Hard_reboot
 
 Its Just So Hard reboot test:
@@ -892,23 +1006,8 @@
   adb shell 'reboot "Its Just So Hard"'
   wait_for_screen
   EXPECT_PROPERTY sys.boot.reason reboot,its_just_so_hard
-  EXPECT_PROPERTY persist.sys.boot.reason "reboot,Its Just So Hard"
-  # Do not leave this test with an illegal value in persist.sys.boot.reason
-  save_ret=${?}           # hold on to error code from above two lines
-  if isDebuggable; then   # can do this easy, or we can do this hard.
-    adb shell su root setprop persist.sys.boot.reason reboot,its_just_so_hard
-    ( exit ${save_ret} )  # because one can not just do ?=${save_ret}
-  else
-    report_bootstat_logs reboot,its_just_so_hard  # report what we have so far
-    # user build mitigation
-    adb shell reboot its_just_so_hard
-    wait_for_screen
-    ( exit ${save_ret} )  # because one can not just do ?=${save_ret}
-    EXPECT_PROPERTY sys.boot.reason reboot,its_just_so_hard
-  fi
-  # Ensure persist.sys.boot.reason now valid, failure here acts as a signal
-  # that we could choke up following tests.  For example test_properties.
-  EXPECT_PROPERTY persist.sys.boot.reason reboot,its_just_so_hard ${flag}
+  EXPECT_PROPERTY sys.boot.reason.last reboot,its_just_so_hard
+  EXPECT_PROPERTY persist.sys.boot.reason ""
   report_bootstat_logs reboot,its_just_so_hard
 }
 
@@ -957,7 +1056,8 @@
   # Check values
   EXPECT_PROPERTY ro.boot.bootreason "${bootloader_expected}"
   EXPECT_PROPERTY sys.boot.reason "${sys_expected}"
-  EXPECT_PROPERTY persist.sys.boot.reason "${last_expected}"
+  EXPECT_PROPERTY sys.boot.reason.last "${last_expected}"
+  EXPECT_PROPERTY persist.sys.boot.reason ""
   report_bootstat_logs "${sys_expected}"
 }
 
@@ -1051,12 +1151,12 @@
   if [ -z "${2}" ]; then
     # Hard coded should shell fail to find them above (search/permission issues)
     eval set properties ota cold factory_reset hard battery unknown \
-             kernel_panic warm thermal_shutdown userrequested_shutdown \
-             shell_reboot adb_reboot Its_Just_So_Hard_reboot \
-             bootloader_normal bootloader_watchdog bootloader_kernel_panic \
-             bootloader_oem_powerkey bootloader_wdog_reset \
-             bootloader_wdog_reset bootloader_wdog_reset bootloader_hard \
-             bootloader_recovery
+             kernel_panic kernel_panic_subreason kernel_panic_hung warm \
+             thermal_shutdown userrequested_shutdown shell_reboot adb_reboot \
+             Its_Just_So_Hard_reboot bootloader_normal bootloader_watchdog \
+             bootloader_kernel_panic bootloader_oem_powerkey \
+             bootloader_wdog_reset bootloader_wdog_reset bootloader_wdog_reset \
+             bootloader_hard bootloader_recovery
   fi
   if [ X"nothing" = X"${1}" ]; then
     shift 1
diff --git a/bootstat/bootstat.cpp b/bootstat/bootstat.cpp
index 7a67894..8c8d921 100644
--- a/bootstat/bootstat.cpp
+++ b/bootstat/bootstat.cpp
@@ -29,7 +29,9 @@
 #include <ctime>
 #include <map>
 #include <memory>
+#include <regex>
 #include <string>
+#include <utility>
 #include <vector>
 
 #include <android-base/chrono_utils.h>
@@ -41,7 +43,6 @@
 #include <android/log.h>
 #include <cutils/android_reboot.h>
 #include <cutils/properties.h>
-#include <log/logcat.h>
 #include <metricslogger/metrics_logger.h>
 #include <statslog.h>
 
@@ -140,7 +141,7 @@
 // values.
 const std::map<std::string, int32_t> kBootReasonMap = {
     {"empty", kEmptyBootReason},
-    {"unknown", kUnknownBootReason},
+    {"__BOOTSTAT_UNKNOWN__", kUnknownBootReason},
     {"normal", 2},
     {"recovery", 3},
     {"reboot", 4},
@@ -193,12 +194,14 @@
     {"s3_wakeup", 51},
     {"kernel_panic,sysrq", 52},
     {"kernel_panic,NULL", 53},
+    {"kernel_panic,null", 53},
     {"kernel_panic,BUG", 54},
+    {"kernel_panic,bug", 54},
     {"bootloader", 55},
     {"cold", 56},
     {"hard", 57},
     {"warm", 58},
-    {"recovery", 59},
+    {"reboot,kernel_power_off_charging__reboot_system", 59},  // Can not happen
     {"thermal-shutdown", 60},
     {"shutdown,thermal", 61},
     {"shutdown,battery", 62},
@@ -225,11 +228,11 @@
     {"2sec_reboot", 83},
     {"reboot,by_key", 84},
     {"reboot,longkey", 85},
-    {"reboot,2sec", 86},
+    {"reboot,2sec", 86},  // Deprecate in two years, replaced with cold,rtc,2sec
     {"shutdown,thermal,battery", 87},
     {"reboot,its_just_so_hard", 88},  // produced by boot_reason_test
     {"reboot,Its Just So Hard", 89},  // produced by boot_reason_test
-    {"usb", 90},
+    {"reboot,rescueparty", 90},
     {"charge", 91},
     {"oem_tz_crash", 92},
     {"uvlo", 93},
@@ -287,6 +290,27 @@
     {"oem_sdi_err_fatal", 145},
     {"pmic_watchdog", 146},
     {"software_master", 147},
+    {"cold,charger", 148},
+    {"cold,rtc", 149},
+    {"cold,rtc,2sec", 150},
+    {"reboot,tool", 151},
+    {"reboot,wdt", 152},
+    {"reboot,unknown", 153},
+    {"kernel_panic,audit", 154},
+    {"kernel_panic,atomic", 155},
+    {"kernel_panic,hung", 156},
+    {"kernel_panic,hung,rcu", 157},
+    {"kernel_panic,init", 158},
+    {"kernel_panic,oom", 159},
+    {"kernel_panic,stack", 160},
+    {"kernel_panic,sysrq,livelock,alarm", 161},   // llkd
+    {"kernel_panic,sysrq,livelock,driver", 162},  // llkd
+    {"kernel_panic,sysrq,livelock,zombie", 163},  // llkd
+    {"kernel_panic,modem", 164},
+    {"kernel_panic,adsp", 165},
+    {"kernel_panic,dsps", 166},
+    {"kernel_panic,wcnss", 167},
+    {"kernel_panic,_sde_encoder_phys_cmd_handle_ppdone_timeout", 168},
 };
 
 // Converts a string value representing the reason the system booted to an
@@ -463,11 +487,13 @@
     }
     return std::string::npos;
   }
+
+  operator const std::string&() const { return console; }
 };
 
 // If bit error match to needle, correct it.
 // Return true if any corrections were discovered and applied.
-bool correctForBer(std::string& reason, const std::string& needle) {
+bool correctForBitError(std::string& reason, const std::string& needle) {
   bool corrected = false;
   if (reason.length() < needle.length()) return corrected;
   const pstoreConsole console(reason);
@@ -485,20 +511,219 @@
   return corrected;
 }
 
+// If bit error match to needle, correct it.
+// Return true if any corrections were discovered and applied.
+// Try again if we can replace underline with spaces.
+bool correctForBitErrorOrUnderline(std::string& reason, const std::string& needle) {
+  bool corrected = correctForBitError(reason, needle);
+  std::string _needle(needle);
+  std::transform(_needle.begin(), _needle.end(), _needle.begin(),
+                 [](char c) { return (c == '_') ? ' ' : c; });
+  if (needle != _needle) {
+    corrected |= correctForBitError(reason, _needle);
+  }
+  return corrected;
+}
+
+// Converts a string value representing the reason the system booted to a
+// string complying with Android system standard reason.
+void transformReason(std::string& reason) {
+  std::transform(reason.begin(), reason.end(), reason.begin(), ::tolower);
+  std::transform(reason.begin(), reason.end(), reason.begin(),
+                 [](char c) { return ::isblank(c) ? '_' : c; });
+  std::transform(reason.begin(), reason.end(), reason.begin(),
+                 [](char c) { return ::isprint(c) ? c : '?'; });
+}
+
+// Check subreasons for reboot,<subreason> kernel_panic,sysrq,<subreason> or
+// kernel_panic,<subreason>.
+//
+// If quoted flag is set, pull out and correct single quoted ('), newline (\n)
+// or unprintable character terminated subreason, pos is supplied just beyond
+// first quote.  if quoted false, pull out and correct newline (\n) or
+// unprintable character terminated subreason.
+//
+// Heuristics to find termination is painted into a corner:
+
+// single bit error for quote ' that we can block.  It is acceptable for
+// the others 7, g in reason.  2/9 chance will miss the terminating quote,
+// but there is always the terminating newline that usually immediately
+// follows to fortify our chances.
+bool likely_single_quote(char c) {
+  switch (static_cast<uint8_t>(c)) {
+    case '\'':         // '\''
+    case '\'' ^ 0x01:  // '&'
+    case '\'' ^ 0x02:  // '%'
+    case '\'' ^ 0x04:  // '#'
+    case '\'' ^ 0x08:  // '/'
+      return true;
+    case '\'' ^ 0x10:  // '7'
+      break;
+    case '\'' ^ 0x20:  // '\a' (unprintable)
+      return true;
+    case '\'' ^ 0x40:  // 'g'
+      break;
+    case '\'' ^ 0x80:  // 0xA7 (unprintable)
+      return true;
+  }
+  return false;
+}
+
+// ::isprint(c) and likely_space() will prevent us from being called for
+// fundamentally printable entries, except for '\r' and '\b'.
+//
+// Except for * and J, single bit errors for \n, all others are non-
+// printable so easy catch.  It is _acceptable_ for *, J or j to exist in
+// the reason string, so 2/9 chance we will miss the terminating newline.
+//
+// NB: J might not be acceptable, except if at the beginning or preceded
+//     with a space, '(' or any of the quotes and their BER aliases.
+// NB: * might not be acceptable, except if at the beginning or preceded
+//     with a space, another *, or any of the quotes or their BER aliases.
+//
+// To reduce the chances to closer to 1/9 is too complicated for the gain.
+bool likely_newline(char c) {
+  switch (static_cast<uint8_t>(c)) {
+    case '\n':         // '\n' (unprintable)
+    case '\n' ^ 0x01:  // '\r' (unprintable)
+    case '\n' ^ 0x02:  // '\b' (unprintable)
+    case '\n' ^ 0x04:  // 0x0E (unprintable)
+    case '\n' ^ 0x08:  // 0x02 (unprintable)
+    case '\n' ^ 0x10:  // 0x1A (unprintable)
+      return true;
+    case '\n' ^ 0x20:  // '*'
+    case '\n' ^ 0x40:  // 'J'
+      break;
+    case '\n' ^ 0x80:  // 0x8A (unprintable)
+      return true;
+  }
+  return false;
+}
+
+// ::isprint(c) will prevent us from being called for all the printable
+// matches below.  If we let unprintables through because of this, they
+// get converted to underscore (_) by the validation phase.
+bool likely_space(char c) {
+  switch (static_cast<uint8_t>(c)) {
+    case ' ':          // ' '
+    case ' ' ^ 0x01:   // '!'
+    case ' ' ^ 0x02:   // '"'
+    case ' ' ^ 0x04:   // '$'
+    case ' ' ^ 0x08:   // '('
+    case ' ' ^ 0x10:   // '0'
+    case ' ' ^ 0x20:   // '\0' (unprintable)
+    case ' ' ^ 0x40:   // 'P'
+    case ' ' ^ 0x80:   // 0xA0 (unprintable)
+    case '\t':         // '\t'
+    case '\t' ^ 0x01:  // '\b' (unprintable) (likely_newline counters)
+    case '\t' ^ 0x02:  // '\v' (unprintable)
+    case '\t' ^ 0x04:  // '\r' (unprintable) (likely_newline counters)
+    case '\t' ^ 0x08:  // 0x01 (unprintable)
+    case '\t' ^ 0x10:  // 0x19 (unprintable)
+    case '\t' ^ 0x20:  // ')'
+    case '\t' ^ 0x40:  // '1'
+    case '\t' ^ 0x80:  // 0x89 (unprintable)
+      return true;
+  }
+  return false;
+}
+
+std::string getSubreason(const std::string& content, size_t pos, bool quoted) {
+  static constexpr size_t max_reason_length = 256;
+
+  std::string subReason(content.substr(pos, max_reason_length));
+  // Correct against any known strings that Bit Error Match
+  for (const auto& s : knownReasons) {
+    correctForBitErrorOrUnderline(subReason, s);
+  }
+  std::string terminator(quoted ? "'" : "");
+  for (const auto& m : kBootReasonMap) {
+    if (m.first.length() <= strlen("cold")) continue;  // too short?
+    if (correctForBitErrorOrUnderline(subReason, m.first + terminator)) continue;
+    if (m.first.length() <= strlen("reboot,cold")) continue;  // short?
+    if (android::base::StartsWith(m.first, "reboot,")) {
+      correctForBitErrorOrUnderline(subReason, m.first.substr(strlen("reboot,")) + terminator);
+    } else if (android::base::StartsWith(m.first, "kernel_panic,sysrq,")) {
+      correctForBitErrorOrUnderline(subReason,
+                                    m.first.substr(strlen("kernel_panic,sysrq,")) + terminator);
+    } else if (android::base::StartsWith(m.first, "kernel_panic,")) {
+      correctForBitErrorOrUnderline(subReason, m.first.substr(strlen("kernel_panic,")) + terminator);
+    }
+  }
+  for (pos = 0; pos < subReason.length(); ++pos) {
+    char c = subReason[pos];
+    if (!(::isprint(c) || likely_space(c)) || likely_newline(c) ||
+        (quoted && likely_single_quote(c))) {
+      subReason.erase(pos);
+      break;
+    }
+  }
+  transformReason(subReason);
+  return subReason;
+}
+
 bool addKernelPanicSubReason(const pstoreConsole& console, std::string& ret) {
   // Check for kernel panic types to refine information
-  if (console.rfind("SysRq : Trigger a crash") != std::string::npos) {
-    // Can not happen, except on userdebug, during testing/debugging.
+  if ((console.rfind("SysRq : Trigger a crash") != std::string::npos) ||
+      (console.rfind("PC is at sysrq_handle_crash+") != std::string::npos)) {
     ret = "kernel_panic,sysrq";
+    // Invented for Android to allow daemons that specifically trigger sysrq
+    // to communicate more accurate boot subreasons via last console messages.
+    static constexpr char sysrqSubreason[] = "SysRq : Trigger a crash : '";
+    auto pos = console.rfind(sysrqSubreason);
+    if (pos != std::string::npos) {
+      ret += "," + getSubreason(console, pos + strlen(sysrqSubreason), /* quoted */ true);
+    }
     return true;
   }
   if (console.rfind("Unable to handle kernel NULL pointer dereference at virtual address") !=
       std::string::npos) {
-    ret = "kernel_panic,NULL";
+    ret = "kernel_panic,null";
     return true;
   }
   if (console.rfind("Kernel BUG at ") != std::string::npos) {
-    ret = "kernel_panic,BUG";
+    ret = "kernel_panic,bug";
+    return true;
+  }
+
+  std::string panic("Kernel panic - not syncing: ");
+  auto pos = console.rfind(panic);
+  if (pos != std::string::npos) {
+    static const std::vector<std::pair<const std::string, const std::string>> panicReasons = {
+        {"Out of memory", "oom"},
+        {"out of memory", "oom"},
+        {"Oh boy, that early out of memory", "oom"},  // omg
+        {"BUG!", "bug"},
+        {"hung_task: blocked tasks", "hung"},
+        {"audit: ", "audit"},
+        {"scheduling while atomic", "atomic"},
+        {"Attempted to kill init!", "init"},
+        {"Requested init", "init"},
+        {"No working init", "init"},
+        {"Could not decompress init", "init"},
+        {"RCU Stall", "hung,rcu"},
+        {"stack-protector", "stack"},
+        {"kernel stack overflow", "stack"},
+        {"Corrupt kernel stack", "stack"},
+        {"low stack detected", "stack"},
+        {"corrupted stack end", "stack"},
+        {"subsys-restart: Resetting the SoC - modem crashed.", "modem"},
+        {"subsys-restart: Resetting the SoC - adsp crashed.", "adsp"},
+        {"subsys-restart: Resetting the SoC - dsps crashed.", "dsps"},
+        {"subsys-restart: Resetting the SoC - wcnss crashed.", "wcnss"},
+    };
+
+    ret = "kernel_panic";
+    for (auto& s : panicReasons) {
+      if (console.find(panic + s.first, pos) != std::string::npos) {
+        ret += "," + s.second;
+        return true;
+      }
+    }
+    auto reason = getSubreason(console, pos + panic.length(), /* newline */ false);
+    if (reason.length() > 3) {
+      ret += "," + reason;
+    }
     return true;
   }
   return false;
@@ -508,32 +733,13 @@
   return addKernelPanicSubReason(pstoreConsole(content), ret);
 }
 
-// std::transform Helper callback functions:
-// Converts a string value representing the reason the system booted to a
-// string complying with Android system standard reason.
-char tounderline(char c) {
-  return ::isblank(c) ? '_' : c;
-}
-
-char toprintable(char c) {
-  return ::isprint(c) ? c : '?';
-}
-
-// Cleanup boot_reason regarding acceptable character set
-void transformReason(std::string& reason) {
-  std::transform(reason.begin(), reason.end(), reason.begin(), ::tolower);
-  std::transform(reason.begin(), reason.end(), reason.begin(), tounderline);
-  std::transform(reason.begin(), reason.end(), reason.begin(), toprintable);
-}
-
 const char system_reboot_reason_property[] = "sys.boot.reason";
 const char last_reboot_reason_property[] = LAST_REBOOT_REASON_PROPERTY;
+const char last_last_reboot_reason_property[] = "sys.boot.reason.last";
 const char bootloader_reboot_reason_property[] = "ro.boot.bootreason";
 
 // Scrub, Sanitize, Standardize and Enhance the boot reason string supplied.
 std::string BootReasonStrToReason(const std::string& boot_reason) {
-  static const size_t max_reason_length = 256;
-
   std::string ret(GetProperty(system_reboot_reason_property));
   std::string reason(boot_reason);
   // If sys.boot.reason == ro.boot.bootreason, let's re-evaluate
@@ -568,26 +774,39 @@
     // A series of checks to take some officially unsupported reasons
     // reported by the bootloader and find some logical and canonical
     // sense.  In an ideal world, we would require those bootloaders
-    // to behave and follow our standards.
+    // to behave and follow our CTS standards.
+    //
+    // first member is the output
+    // second member is an unanchored regex for an alias
+    //
+    // If output has a prefix of <bang> '!', we do not use it as a
+    // match needle (and drop the <bang> prefix when landing in output),
+    // otherwise look for it as well. This helps keep the scale of the
+    // following table smaller.
     static const std::vector<std::pair<const std::string, const std::string>> aliasReasons = {
         {"watchdog", "wdog"},
-        {"cold,powerkey", "powerkey"},
+        {"cold,powerkey", "powerkey|power_key|PowerKey"},
         {"kernel_panic", "panic"},
         {"shutdown,thermal", "thermal"},
         {"warm,s3_wakeup", "s3_wakeup"},
         {"hard,hw_reset", "hw_reset"},
-        {"reboot,2sec", "2sec_reboot"},
+        {"cold,charger", "usb"},
+        {"cold,rtc", "rtc"},
+        {"cold,rtc,2sec", "2sec_reboot"},
+        {"!warm", "wdt_by_pass_pwk"},  // change flavour of blunt
+        {"!reboot", "^wdt$"},          // change flavour of blunt
+        {"reboot,tool", "tool_by_pass_pwk"},
         {"bootloader", ""},
     };
 
-    // Either the primary or alias is found _somewhere_ in the reason string.
     for (auto& s : aliasReasons) {
-      if (reason.find(s.first) != std::string::npos) {
+      size_t firstHasNot = s.first[0] == '!';
+      if (!firstHasNot && (reason.find(s.first) != std::string::npos)) {
         ret = s.first;
         break;
       }
-      if (s.second.size() && (reason.find(s.second) != std::string::npos)) {
-        ret = s.first;
+      if (s.second.size() && std::regex_search(reason, std::regex(s.second))) {
+        ret = s.first.substr(firstHasNot);
         break;
       }
     }
@@ -626,28 +845,7 @@
       static const char cmd[] = "reboot: Restarting system with command '";
       size_t pos = console.rfind(cmd);
       if (pos != std::string::npos) {
-        pos += strlen(cmd);
-        std::string subReason(content.substr(pos, max_reason_length));
-        // Correct against any known strings that Bit Error Match
-        for (const auto& s : knownReasons) {
-          correctForBer(subReason, s);
-        }
-        for (const auto& m : kBootReasonMap) {
-          if (m.first.length() <= strlen("cold")) continue;  // too short?
-          if (correctForBer(subReason, m.first + "'")) continue;
-          if (m.first.length() <= strlen("reboot,cold")) continue;  // short?
-          if (!android::base::StartsWith(m.first, "reboot,")) continue;
-          correctForBer(subReason, m.first.substr(strlen("reboot,")) + "'");
-        }
-        for (pos = 0; pos < subReason.length(); ++pos) {
-          char c = subReason[pos];
-          // #, &, %, / are common single bit error for ' that we can block
-          if (!::isprint(c) || (c == '\'') || (c == '#') || (c == '&') || (c == '%') || (c == '/')) {
-            subReason.erase(pos);
-            break;
-          }
-        }
-        transformReason(subReason);
+        std::string subReason(getSubreason(content, pos + strlen(cmd), /* quoted */ true));
         if (subReason != "") {  // Will not land "reboot" as that is too blunt.
           if (isKernelRebootReason(subReason)) {
             ret = "reboot," + subReason;  // User space can't talk kernel reasons.
@@ -657,6 +855,10 @@
             ret = "reboot," + subReason;  // legitimize unknown reasons
           }
         }
+        // Some bootloaders shutdown results record in last kernel message.
+        if (!strcmp(ret.c_str(), "reboot,kernel_power_off_charging__reboot_system")) {
+          ret = "shutdown";
+        }
       }
 
       // Check for kernel panics, allowed to override reboot command.
@@ -668,103 +870,7 @@
       }
     }
 
-    // The following battery test should migrate to a default system health HAL
-
-    // Let us not worry if the reboot command was issued, for the cases of
-    // reboot -p, reboot <no reason>, reboot cold, reboot warm and reboot hard.
-    // Same for bootloader and ro.boot.bootreasons of this set, but a dead
-    // battery could conceivably lead to these, so worthy of override.
-    if (isBluntRebootReason(ret)) {
-      // Heuristic to determine if shutdown possibly because of a dead battery?
-      // Really a hail-mary pass to find it in last klog content ...
-      static const int battery_dead_threshold = 2;  // percent
-      static const char battery[] = "healthd: battery l=";
-      const pstoreConsole console(content);
-      size_t pos = console.rfind(battery);  // last one
-      std::string digits;
-      if (pos != std::string::npos) {
-        digits = content.substr(pos + strlen(battery), strlen("100 "));
-        // correct common errors
-        correctForBer(digits, "100 ");
-        if (digits[0] == '!') digits[0] = '1';
-        if (digits[1] == '!') digits[1] = '1';
-      }
-      const char* endptr = digits.c_str();
-      unsigned level = 0;
-      while (::isdigit(*endptr)) {
-        level *= 10;
-        level += *endptr++ - '0';
-        // make sure no leading zeros, except zero itself, and range check.
-        if ((level == 0) || (level > 100)) break;
-      }
-      // example bit error rate issues for 10%
-      //   'l=10 ' no bits in error
-      //   'l=00 ' single bit error (fails above)
-      //   'l=1  ' single bit error
-      //   'l=0  ' double bit error
-      // There are others, not typically critical because of 2%
-      // battery_dead_threshold. KISS check, make sure second
-      // character after digit sequence is not a space.
-      if ((level <= 100) && (endptr != digits.c_str()) && (endptr[0] == ' ') && (endptr[1] != ' ')) {
-        LOG(INFO) << "Battery level at shutdown " << level << "%";
-        if (level <= battery_dead_threshold) {
-          ret = "shutdown,battery";
-        }
-      } else {        // Most likely
-        digits = "";  // reset digits
-
-        // Content buffer no longer will have console data. Beware if more
-        // checks added below, that depend on parsing console content.
-        content = "";
-
-        LOG(DEBUG) << "Can not find last low battery in last console messages";
-        android_logcat_context ctx = create_android_logcat();
-        FILE* fp = android_logcat_popen(&ctx, "logcat -b kernel -v brief -d");
-        if (fp != nullptr) {
-          android::base::ReadFdToString(fileno(fp), &content);
-        }
-        android_logcat_pclose(&ctx, fp);
-        static const char logcat_battery[] = "W/healthd (    0): battery l=";
-        const char* match = logcat_battery;
-
-        if (content == "") {
-          // Service logd.klog not running, go to smaller buffer in the kernel.
-          int rc = klogctl(KLOG_SIZE_BUFFER, nullptr, 0);
-          if (rc > 0) {
-            ssize_t len = rc + 1024;  // 1K Margin should it grow between calls.
-            std::unique_ptr<char[]> buf(new char[len]);
-            rc = klogctl(KLOG_READ_ALL, buf.get(), len);
-            if (rc < len) {
-              len = rc + 1;
-            }
-            buf[--len] = '\0';
-            content = buf.get();
-          }
-          match = battery;
-        }
-
-        pos = content.find(match);  // The first one it finds.
-        if (pos != std::string::npos) {
-          digits = content.substr(pos + strlen(match), strlen("100 "));
-        }
-        endptr = digits.c_str();
-        level = 0;
-        while (::isdigit(*endptr)) {
-          level *= 10;
-          level += *endptr++ - '0';
-          // make sure no leading zeros, except zero itself, and range check.
-          if ((level == 0) || (level > 100)) break;
-        }
-        if ((level <= 100) && (endptr != digits.c_str()) && (*endptr == ' ')) {
-          LOG(INFO) << "Battery level at startup " << level << "%";
-          if (level <= battery_dead_threshold) {
-            ret = "shutdown,battery";
-          }
-        } else {
-          LOG(DEBUG) << "Can not find first battery level in dmesg or logcat";
-        }
-      }
-    }
+    // TODO: use the HAL to get battery level (http://b/77725702).
 
     // Is there a controlled shutdown hint in last_reboot_reason_property?
     if (isBluntRebootReason(ret)) {
@@ -801,10 +907,6 @@
   }
 
   LOG(INFO) << "Canonical boot reason: " << ret;
-  if (isKernelRebootReason(ret) && (GetProperty(last_reboot_reason_property) != "")) {
-    // Rewrite as it must be old news, kernel reasons trump user space.
-    SetProperty(last_reboot_reason_property, ret);
-  }
   return ret;
 }
 
@@ -956,6 +1058,15 @@
   const std::string system_boot_reason(BootReasonStrToReason(bootloader_boot_reason));
   // Record the scrubbed system_boot_reason to the property
   SetProperty(system_reboot_reason_property, system_boot_reason);
+  // Shift last_reboot_reason_property to last_last_reboot_reason_property
+  std::string last_boot_reason(GetProperty(last_reboot_reason_property));
+  if (last_boot_reason.empty() || isKernelRebootReason(system_boot_reason)) {
+    last_boot_reason = system_boot_reason;
+  } else {
+    transformReason(last_boot_reason);
+  }
+  SetProperty(last_last_reboot_reason_property, last_boot_reason);
+  SetProperty(last_reboot_reason_property, "");
 }
 
 // Gets the boot time offset. This is useful when Android is running in a
diff --git a/debuggerd/Android.bp b/debuggerd/Android.bp
index 7e6f24d..1b20157 100644
--- a/debuggerd/Android.bp
+++ b/debuggerd/Android.bp
@@ -17,6 +17,7 @@
 cc_library_headers {
     name: "libdebuggerd_common_headers",
     export_include_dirs: ["common/include"],
+    recovery_available: true,
 }
 
 cc_library_shared {
@@ -46,6 +47,7 @@
 cc_library_static {
     name: "libtombstoned_client_static",
     defaults: ["debuggerd_defaults"],
+    recovery_available: true,
     srcs: [
         "tombstoned/tombstoned_client.cpp",
         "util.cpp",
@@ -67,6 +69,7 @@
 cc_library_static {
     name: "libdebuggerd_handler_core",
     defaults: ["debuggerd_defaults"],
+    recovery_available: true,
     srcs: ["handler/debuggerd_handler.cpp"],
 
     header_libs: [
@@ -101,6 +104,7 @@
 cc_library_static {
     name: "libdebuggerd_handler_fallback",
     defaults: ["debuggerd_defaults"],
+    recovery_available: true,
     srcs: [
         "handler/debuggerd_fallback.cpp",
     ],
@@ -112,12 +116,17 @@
         "libbase",
         "libdebuggerd",
         "libbacktrace",
-        "libunwind",
         "libunwindstack",
         "libdexfile",
         "liblzma",
         "libcutils",
     ],
+    target: {
+        recovery: {
+            cflags: ["-DNO_LIBDEXFILE_SUPPORT"],
+            exclude_static_libs: ["libdexfile"],
+        },
+    },
 
     export_include_dirs: ["include"],
 }
@@ -144,6 +153,7 @@
 cc_library_static {
     name: "libdebuggerd",
     defaults: ["debuggerd_defaults"],
+    recovery_available: true,
 
     srcs: [
         "libdebuggerd/backtrace.cpp",
@@ -158,7 +168,6 @@
 
     static_libs: [
         "libbacktrace",
-        "libunwind",
         "libunwindstack",
         "liblzma",
         "libbase",
@@ -221,6 +230,8 @@
             stem: "debuggerd_test64",
         },
     },
+
+    test_suites: ["device-tests"],
 }
 
 cc_benchmark {
diff --git a/debuggerd/crasher/crasher.cpp b/debuggerd/crasher/crasher.cpp
index 4b32b9d..f31337d 100644
--- a/debuggerd/crasher/crasher.cpp
+++ b/debuggerd/crasher/crasher.cpp
@@ -197,6 +197,7 @@
     fprintf(stderr, "  LOG-FATAL             call libbase LOG(FATAL)\n");
     fprintf(stderr, "\n");
     fprintf(stderr, "  SIGFPE                cause a SIGFPE\n");
+    fprintf(stderr, "  SIGILL                cause a SIGILL\n");
     fprintf(stderr, "  SIGSEGV               cause a SIGSEGV at address 0x0 (synonym: crash)\n");
     fprintf(stderr, "  SIGSEGV-non-null      cause a SIGSEGV at a non-zero address\n");
     fprintf(stderr, "  SIGSEGV-unmapped      mmap/munmap a region of memory and then attempt to access it\n");
@@ -268,6 +269,16 @@
     } else if (!strcasecmp(arg, "SIGFPE")) {
         raise(SIGFPE);
         return EXIT_SUCCESS;
+    } else if (!strcasecmp(arg, "SIGILL")) {
+#if defined(__aarch64__)
+      __asm__ volatile(".word 0\n");
+#elif defined(__arm__)
+      __asm__ volatile(".word 0xe7f0def0\n");
+#elif defined(__i386__) || defined(__x86_64__)
+      __asm__ volatile("ud2\n");
+#else
+#error
+#endif
     } else if (!strcasecmp(arg, "SIGTRAP")) {
         raise(SIGTRAP);
         return EXIT_SUCCESS;
diff --git a/debuggerd/debuggerd.cpp b/debuggerd/debuggerd.cpp
index b016e23..360ea95 100644
--- a/debuggerd/debuggerd.cpp
+++ b/debuggerd/debuggerd.cpp
@@ -20,6 +20,7 @@
 #include <string.h>
 
 #include <limits>
+#include <string_view>
 #include <thread>
 
 #include <android-base/file.h>
@@ -33,9 +34,10 @@
 using android::base::unique_fd;
 
 static void usage(int exit_code) {
-  fprintf(stderr, "usage: debuggerd [-b] PID\n");
+  fprintf(stderr, "usage: debuggerd [-bj] PID\n");
   fprintf(stderr, "\n");
   fprintf(stderr, "-b, --backtrace    just a backtrace rather than a full tombstone\n");
+  fprintf(stderr, "-j                 collect java traces\n");
   _exit(exit_code);
 }
 
@@ -58,8 +60,19 @@
 int main(int argc, char* argv[]) {
   if (argc <= 1) usage(0);
   if (argc > 3) usage(1);
-  if (argc == 3 && strcmp(argv[1], "-b") != 0 && strcmp(argv[1], "--backtrace") != 0) usage(1);
-  bool backtrace_only = argc == 3;
+
+  DebuggerdDumpType dump_type = kDebuggerdTombstone;
+
+  if (argc == 3) {
+    std::string_view flag = argv[1];
+    if (flag == "-b" || flag == "--backtrace") {
+      dump_type = kDebuggerdNativeBacktrace;
+    } else if (flag == "-j") {
+      dump_type = kDebuggerdJavaBacktrace;
+    } else {
+      usage(1);
+    }
+  }
 
   pid_t pid;
   if (!android::base::ParseInt(argv[argc - 1], &pid, 1, std::numeric_limits<pid_t>::max())) {
@@ -90,8 +103,7 @@
   }
 
   std::thread redirect_thread = spawn_redirect_thread(std::move(piperead));
-  if (!debuggerd_trigger_dump(pid, backtrace_only ? kDebuggerdNativeBacktrace : kDebuggerdTombstone,
-                              0, std::move(pipewrite))) {
+  if (!debuggerd_trigger_dump(pid, dump_type, 0, std::move(pipewrite))) {
     redirect_thread.join();
     errx(1, "failed to dump process %d", pid);
   }
diff --git a/debuggerd/debuggerd_test.cpp b/debuggerd/debuggerd_test.cpp
index 397ff2f..dfb7a6a 100644
--- a/debuggerd/debuggerd_test.cpp
+++ b/debuggerd/debuggerd_test.cpp
@@ -80,8 +80,13 @@
     return value;                                                  \
   }()
 
+// Backtrace frame dump could contain:
+//   #01 pc 0001cded  /data/tmp/debuggerd_test32 (raise_debugger_signal+80)
+// or
+//   #01 pc 00022a09  /data/tmp/debuggerd_test32 (offset 0x12000) (raise_debugger_signal+80)
 #define ASSERT_BACKTRACE_FRAME(result, frame_name) \
-  ASSERT_MATCH(result, R"(#\d\d pc [0-9a-f]+\s+ \S+ \()" frame_name R"(\+)");
+  ASSERT_MATCH(result,                             \
+               R"(#\d\d pc [0-9a-f]+\s+ \S+ (\(offset 0x[0-9a-f]+\) )?\()" frame_name R"(\+)");
 
 static void tombstoned_intercept(pid_t target_pid, unique_fd* intercept_fd, unique_fd* output_fd,
                                  InterceptStatus* status, DebuggerdDumpType intercept_type) {
@@ -346,7 +351,9 @@
 
   std::string result;
   ConsumeFd(std::move(output_fd), &result);
-  ASSERT_MATCH(result, R"(signal 11 \(SIGSEGV\), code 0 \(SI_USER\), fault addr --------)");
+  ASSERT_MATCH(
+      result,
+      R"(signal 11 \(SIGSEGV\), code 0 \(SI_USER from pid \d+, uid \d+\), fault addr --------)");
   ASSERT_MATCH(result, R"(backtrace:)");
 }
 
@@ -354,7 +361,14 @@
   int intercept_result;
   unique_fd output_fd;
   StartProcess([]() {
-    android_set_abort_message("abort message goes here");
+    // Arrived at experimentally;
+    // logd truncates at 4062.
+    // strlen("Abort message: ''") is 17.
+    // That's 4045, but we also want a NUL.
+    char buf[4045 + 1];
+    memset(buf, 'x', sizeof(buf));
+    buf[sizeof(buf) - 1] = '\0';
+    android_set_abort_message(buf);
     abort();
   });
   StartIntercept(&output_fd);
@@ -366,7 +380,7 @@
 
   std::string result;
   ConsumeFd(std::move(output_fd), &result);
-  ASSERT_MATCH(result, R"(Abort message: 'abort message goes here')");
+  ASSERT_MATCH(result, R"(Abort message: 'x{4045}')");
 }
 
 TEST_F(CrasherTest, abort_message_backtrace) {
diff --git a/debuggerd/handler/debuggerd_fallback.cpp b/debuggerd/handler/debuggerd_fallback.cpp
index dea2e17..079a574 100644
--- a/debuggerd/handler/debuggerd_fallback.cpp
+++ b/debuggerd/handler/debuggerd_fallback.cpp
@@ -304,7 +304,16 @@
 
   crash_mutex.lock();
   if (lock_count++ > 0) {
-    async_safe_format_log(ANDROID_LOG_ERROR, "libc", "recursed signal handler call, exiting");
+    async_safe_format_log(ANDROID_LOG_ERROR, "libc", "recursed signal handler call, aborting");
+    signal(SIGABRT, SIG_DFL);
+    raise(SIGABRT);
+    sigset_t sigset;
+    sigemptyset(&sigset);
+    sigaddset(&sigset, SIGABRT);
+    sigprocmask(SIG_UNBLOCK, &sigset, nullptr);
+
+    // Just in case...
+    async_safe_format_log(ANDROID_LOG_ERROR, "libc", "abort didn't exit, exiting");
     _exit(1);
   }
 
diff --git a/debuggerd/handler/debuggerd_handler.cpp b/debuggerd/handler/debuggerd_handler.cpp
index 05e6efa..c07a34a 100644
--- a/debuggerd/handler/debuggerd_handler.cpp
+++ b/debuggerd/handler/debuggerd_handler.cpp
@@ -169,24 +169,26 @@
     return;
   }
 
-  const char* signal_name = get_signame(info->si_signo);
-  bool has_address = signal_has_si_addr(info->si_signo, info->si_code);
-
-  // Many signals don't have an address.
+  // Many signals don't have an address or sender.
   char addr_desc[32] = "";  // ", fault addr 0x1234"
-  if (has_address) {
+  if (signal_has_si_addr(info)) {
     async_safe_format_buffer(addr_desc, sizeof(addr_desc), ", fault addr %p", info->si_addr);
   }
+  pid_t self_pid = __getpid();
+  char sender_desc[32] = {};  // " from pid 1234, uid 666"
+  if (signal_has_sender(info, self_pid)) {
+    get_signal_sender(sender_desc, sizeof(sender_desc), info);
+  }
 
   char main_thread_name[MAX_TASK_NAME_LEN + 1];
   if (!get_main_thread_name(main_thread_name, sizeof(main_thread_name))) {
     strncpy(main_thread_name, "<unknown>", sizeof(main_thread_name));
   }
 
-  async_safe_format_log(
-      ANDROID_LOG_FATAL, "libc", "Fatal signal %d (%s), code %d (%s)%s in tid %d (%s), pid %d (%s)",
-      info->si_signo, signal_name, info->si_code, get_sigcode(info->si_signo, info->si_code),
-      addr_desc, __gettid(), thread_name, __getpid(), main_thread_name);
+  async_safe_format_log(ANDROID_LOG_FATAL, "libc",
+                        "Fatal signal %d (%s), code %d (%s%s)%s in tid %d (%s), pid %d (%s)",
+                        info->si_signo, get_signame(info), info->si_code, get_sigcode(info),
+                        sender_desc, addr_desc, __gettid(), thread_name, self_pid, main_thread_name);
 }
 
 /*
diff --git a/debuggerd/libdebuggerd/include/libdebuggerd/utility.h b/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
index 7b04e71..7c5304e 100644
--- a/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
+++ b/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
@@ -74,8 +74,10 @@
 
 void drop_capabilities();
 
-bool signal_has_si_addr(int si_signo, int si_code);
-const char* get_signame(int sig);
-const char* get_sigcode(int signo, int code);
+bool signal_has_sender(const siginfo_t*, pid_t caller_pid);
+bool signal_has_si_addr(const siginfo_t*);
+void get_signal_sender(char* buf, size_t n, const siginfo_t*);
+const char* get_signame(const siginfo_t*);
+const char* get_sigcode(const siginfo_t*);
 
 #endif // _DEBUGGERD_UTILITY_H
diff --git a/debuggerd/libdebuggerd/tombstone.cpp b/debuggerd/libdebuggerd/tombstone.cpp
index 933a597..433bb46 100644
--- a/debuggerd/libdebuggerd/tombstone.cpp
+++ b/debuggerd/libdebuggerd/tombstone.cpp
@@ -102,18 +102,31 @@
   if (!cause.empty()) _LOG(log, logtype::HEADER, "Cause: %s\n", cause.c_str());
 }
 
-static void dump_signal_info(log_t* log, const siginfo_t* si) {
-  char addr_desc[32]; // ", fault addr 0x1234"
-  if (signal_has_si_addr(si->si_signo, si->si_code)) {
-    snprintf(addr_desc, sizeof(addr_desc), "%p", si->si_addr);
+static void dump_signal_info(log_t* log, const ThreadInfo& thread_info, Memory* process_memory) {
+  char addr_desc[64];  // ", fault addr 0x1234"
+  if (signal_has_si_addr(thread_info.siginfo)) {
+    void* addr = thread_info.siginfo->si_addr;
+    if (thread_info.siginfo->si_signo == SIGILL) {
+      uint32_t instruction = {};
+      process_memory->Read(reinterpret_cast<uint64_t>(addr), &instruction, sizeof(instruction));
+      snprintf(addr_desc, sizeof(addr_desc), "%p (*pc=%#08x)", addr, instruction);
+    } else {
+      snprintf(addr_desc, sizeof(addr_desc), "%p", addr);
+    }
   } else {
     snprintf(addr_desc, sizeof(addr_desc), "--------");
   }
 
-  _LOG(log, logtype::HEADER, "signal %d (%s), code %d (%s), fault addr %s\n", si->si_signo,
-       get_signame(si->si_signo), si->si_code, get_sigcode(si->si_signo, si->si_code), addr_desc);
+  char sender_desc[32] = {};  // " from pid 1234, uid 666"
+  if (signal_has_sender(thread_info.siginfo, thread_info.pid)) {
+    get_signal_sender(sender_desc, sizeof(sender_desc), thread_info.siginfo);
+  }
 
-  dump_probable_cause(log, si);
+  _LOG(log, logtype::HEADER, "signal %d (%s), code %d (%s%s), fault addr %s\n",
+       thread_info.siginfo->si_signo, get_signame(thread_info.siginfo),
+       thread_info.siginfo->si_code, get_sigcode(thread_info.siginfo), sender_desc, addr_desc);
+
+  dump_probable_cause(log, thread_info.siginfo);
 }
 
 static void dump_thread_info(log_t* log, const ThreadInfo& thread_info) {
@@ -239,19 +252,22 @@
     return;
   }
 
-  char msg[512];
-  if (length >= sizeof(msg)) {
-    _LOG(log, logtype::HEADER, "Abort message too long: claimed length = %zd\n", length);
+  // The length field includes the length of the length field itself.
+  if (length < sizeof(size_t)) {
+    _LOG(log, logtype::HEADER, "Abort message header malformed: claimed length = %zd\n", length);
     return;
   }
 
-  if (!process_memory->ReadFully(address + sizeof(length), msg, length)) {
+  length -= sizeof(size_t);
+
+  // The abort message should be null terminated already, but reserve a spot for NUL just in case.
+  std::vector<char> msg(length + 1);
+  if (!process_memory->ReadFully(address + sizeof(length), &msg[0], length)) {
     _LOG(log, logtype::HEADER, "Failed to read abort message: %s\n", strerror(errno));
     return;
   }
 
-  msg[length] = '\0';
-  _LOG(log, logtype::HEADER, "Abort message: '%s'\n", msg);
+  _LOG(log, logtype::HEADER, "Abort message: '%s'\n", &msg[0]);
 }
 
 static void dump_all_maps(log_t* log, BacktraceMap* map, Memory* process_memory, uint64_t addr) {
@@ -409,7 +425,7 @@
   dump_thread_info(log, thread_info);
 
   if (thread_info.siginfo) {
-    dump_signal_info(log, thread_info.siginfo);
+    dump_signal_info(log, thread_info, process_memory);
   }
 
   if (primary_thread) {
@@ -439,7 +455,7 @@
     if (map) {
       uint64_t addr = 0;
       siginfo_t* si = thread_info.siginfo;
-      if (signal_has_si_addr(si->si_signo, si->si_code)) {
+      if (signal_has_si_addr(si)) {
         addr = reinterpret_cast<uint64_t>(si->si_addr);
       }
       dump_all_maps(log, map, process_memory, addr);
diff --git a/debuggerd/libdebuggerd/utility.cpp b/debuggerd/libdebuggerd/utility.cpp
index d153865..1f6f3c8 100644
--- a/debuggerd/libdebuggerd/utility.cpp
+++ b/debuggerd/libdebuggerd/utility.cpp
@@ -74,25 +74,22 @@
                       && (log->crashed_tid == log->current_tid);
   static bool write_to_kmsg = should_write_to_kmsg();
 
-  char buf[512];
+  std::string msg;
   va_list ap;
   va_start(ap, fmt);
-  vsnprintf(buf, sizeof(buf), fmt, ap);
+  android::base::StringAppendV(&msg, fmt, ap);
   va_end(ap);
 
-  size_t len = strlen(buf);
-  if (len <= 0) {
-    return;
-  }
+  if (msg.empty()) return;
 
   if (write_to_tombstone) {
-    TEMP_FAILURE_RETRY(write(log->tfd, buf, len));
+    TEMP_FAILURE_RETRY(write(log->tfd, msg.c_str(), msg.size()));
   }
 
   if (write_to_logcat) {
-    __android_log_buf_write(LOG_ID_CRASH, ANDROID_LOG_FATAL, LOG_TAG, buf);
+    __android_log_buf_write(LOG_ID_CRASH, ANDROID_LOG_FATAL, LOG_TAG, msg.c_str());
     if (log->amfd_data != nullptr) {
-      *log->amfd_data += buf;
+      *log->amfd_data += msg;
     }
 
     if (write_to_kmsg) {
@@ -100,11 +97,11 @@
       if (kmsg_fd.get() >= 0) {
         // Our output might contain newlines which would otherwise be handled by the android logger.
         // Split the lines up ourselves before sending to the kernel logger.
-        if (buf[len - 1] == '\n') {
-          buf[len - 1] = '\0';
+        if (msg.back() == '\n') {
+          msg.back() = '\0';
         }
 
-        std::vector<std::string> fragments = android::base::Split(buf, "\n");
+        std::vector<std::string> fragments = android::base::Split(msg, "\n");
         for (const std::string& fragment : fragments) {
           static constexpr char prefix[] = "<3>DEBUG: ";
           struct iovec iov[3];
@@ -257,13 +254,13 @@
   }
 }
 
-bool signal_has_si_addr(int si_signo, int si_code) {
+bool signal_has_si_addr(const siginfo_t* si) {
   // Manually sent signals won't have si_addr.
-  if (si_code == SI_USER || si_code == SI_QUEUE || si_code == SI_TKILL) {
+  if (si->si_code == SI_USER || si->si_code == SI_QUEUE || si->si_code == SI_TKILL) {
     return false;
   }
 
-  switch (si_signo) {
+  switch (si->si_signo) {
     case SIGBUS:
     case SIGFPE:
     case SIGILL:
@@ -275,8 +272,16 @@
   }
 }
 
-const char* get_signame(int sig) {
-  switch (sig) {
+bool signal_has_sender(const siginfo_t* si, pid_t caller_pid) {
+  return SI_FROMUSER(si) && (si->si_pid != 0) && (si->si_pid != caller_pid);
+}
+
+void get_signal_sender(char* buf, size_t n, const siginfo_t* si) {
+  snprintf(buf, n, " from pid %d, uid %d", si->si_pid, si->si_uid);
+}
+
+const char* get_signame(const siginfo_t* si) {
+  switch (si->si_signo) {
     case SIGABRT: return "SIGABRT";
     case SIGBUS: return "SIGBUS";
     case SIGFPE: return "SIGFPE";
@@ -293,11 +298,11 @@
   }
 }
 
-const char* get_sigcode(int signo, int code) {
+const char* get_sigcode(const siginfo_t* si) {
   // Try the signal-specific codes...
-  switch (signo) {
+  switch (si->si_signo) {
     case SIGILL:
-      switch (code) {
+      switch (si->si_code) {
         case ILL_ILLOPC: return "ILL_ILLOPC";
         case ILL_ILLOPN: return "ILL_ILLOPN";
         case ILL_ILLADR: return "ILL_ILLADR";
@@ -310,7 +315,7 @@
       static_assert(NSIGILL == ILL_BADSTK, "missing ILL_* si_code");
       break;
     case SIGBUS:
-      switch (code) {
+      switch (si->si_code) {
         case BUS_ADRALN: return "BUS_ADRALN";
         case BUS_ADRERR: return "BUS_ADRERR";
         case BUS_OBJERR: return "BUS_OBJERR";
@@ -320,7 +325,7 @@
       static_assert(NSIGBUS == BUS_MCEERR_AO, "missing BUS_* si_code");
       break;
     case SIGFPE:
-      switch (code) {
+      switch (si->si_code) {
         case FPE_INTDIV: return "FPE_INTDIV";
         case FPE_INTOVF: return "FPE_INTOVF";
         case FPE_FLTDIV: return "FPE_FLTDIV";
@@ -333,7 +338,7 @@
       static_assert(NSIGFPE == FPE_FLTSUB, "missing FPE_* si_code");
       break;
     case SIGSEGV:
-      switch (code) {
+      switch (si->si_code) {
         case SEGV_MAPERR: return "SEGV_MAPERR";
         case SEGV_ACCERR: return "SEGV_ACCERR";
 #if defined(SEGV_BNDERR)
@@ -353,21 +358,21 @@
       break;
 #if defined(SYS_SECCOMP) // Our glibc is too old, and we build this for the host too.
     case SIGSYS:
-      switch (code) {
+      switch (si->si_code) {
         case SYS_SECCOMP: return "SYS_SECCOMP";
       }
       static_assert(NSIGSYS == SYS_SECCOMP, "missing SYS_* si_code");
       break;
 #endif
     case SIGTRAP:
-      switch (code) {
+      switch (si->si_code) {
         case TRAP_BRKPT: return "TRAP_BRKPT";
         case TRAP_TRACE: return "TRAP_TRACE";
         case TRAP_BRANCH: return "TRAP_BRANCH";
         case TRAP_HWBKPT: return "TRAP_HWBKPT";
       }
-      if ((code & 0xff) == SIGTRAP) {
-        switch ((code >> 8) & 0xff) {
+      if ((si->si_code & 0xff) == SIGTRAP) {
+        switch ((si->si_code >> 8) & 0xff) {
           case PTRACE_EVENT_FORK:
             return "PTRACE_EVENT_FORK";
           case PTRACE_EVENT_VFORK:
@@ -390,7 +395,7 @@
       break;
   }
   // Then the other codes...
-  switch (code) {
+  switch (si->si_code) {
     case SI_USER: return "SI_USER";
     case SI_KERNEL: return "SI_KERNEL";
     case SI_QUEUE: return "SI_QUEUE";
diff --git a/demangle/Android.bp b/demangle/Android.bp
index 8d5b135..fd79cf8 100644
--- a/demangle/Android.bp
+++ b/demangle/Android.bp
@@ -36,6 +36,7 @@
     name: "libdemangle",
     defaults: ["libdemangle_defaults"],
     vendor_available: true,
+    recovery_available: true,
 
     srcs: [
         "Demangler.cpp",
@@ -78,4 +79,9 @@
     shared_libs: [
         "libdemangle",
     ],
+
+    test_suites: ["device-tests"],
+    required: [
+        "libdemangle",
+    ],
 }
diff --git a/demangle/Android.mk b/demangle/Android.mk
index e3cfc2a..d8082a9 100644
--- a/demangle/Android.mk
+++ b/demangle/Android.mk
@@ -19,7 +19,6 @@
 include $(CLEAR_VARS)
 
 LOCAL_MODULE := demangle_fuzzer
-LOCAL_MODULE_TAGS := optional
 LOCAL_SRC_FILES := \
     Demangler.cpp \
     demangle_fuzzer.cpp \
diff --git a/diagnose_usb/Android.bp b/diagnose_usb/Android.bp
new file mode 100644
index 0000000..6bee28c
--- /dev/null
+++ b/diagnose_usb/Android.bp
@@ -0,0 +1,14 @@
+cc_library_static {
+    name: "libdiagnose_usb",
+    cflags: ["-Wall", "-Wextra", "-Werror"],
+    host_supported: true,
+    recovery_available: true,
+    target: {
+        windows: {
+            enabled: true,
+        },
+    },
+    srcs: ["diagnose_usb.cpp"],
+    export_include_dirs: ["include"],
+    static_libs: ["libbase"],
+}
diff --git a/diagnose_usb/OWNERS b/diagnose_usb/OWNERS
new file mode 100644
index 0000000..643b448
--- /dev/null
+++ b/diagnose_usb/OWNERS
@@ -0,0 +1,2 @@
+jmgao@google.com
+yabinc@google.com
diff --git a/adb/diagnose_usb.cpp b/diagnose_usb/diagnose_usb.cpp
similarity index 97%
rename from adb/diagnose_usb.cpp
rename to diagnose_usb/diagnose_usb.cpp
index 9f721bf..5695ece 100644
--- a/adb/diagnose_usb.cpp
+++ b/diagnose_usb/diagnose_usb.cpp
@@ -33,7 +33,7 @@
 // Returns a message describing any potential problems we find with udev, or an empty string if we
 // can't find plugdev information (i.e. udev is not installed).
 static std::string GetUdevProblem() {
-#if defined(__linux__)
+#if defined(__linux__) && !defined(__BIONIC__)
     errno = 0;
     group* plugdev_group = getgrnam("plugdev");
 
diff --git a/adb/diagnose_usb.h b/diagnose_usb/include/diagnose_usb.h
similarity index 100%
rename from adb/diagnose_usb.h
rename to diagnose_usb/include/diagnose_usb.h
diff --git a/fastboot/Android.mk b/fastboot/Android.mk
index 944b00b..983e195 100644
--- a/fastboot/Android.mk
+++ b/fastboot/Android.mk
@@ -16,14 +16,35 @@
 
 include $(LOCAL_PATH)/../platform_tools_tool_version.mk
 
+fastboot_cflags := -Wall -Wextra -Werror -Wunreachable-code
+fastboot_cflags += -DFASTBOOT_VERSION="\"$(tool_version)\""
+fastboot_cflags_darwin := -Wno-unused-parameter
+fastboot_ldlibs_darwin := -lpthread -framework CoreFoundation -framework IOKit -framework Carbon
+fastboot_ldlibs_windows := -lws2_32
+# Don't add anything here, we don't want additional shared dependencies
+# on the host fastboot tool, and shared libraries that link against libc++
+# will violate ODR.
+fastboot_shared_libs :=
+fastboot_static_libs := \
+    libziparchive \
+    libsparse \
+    libutils \
+    liblog \
+    libz \
+    libdiagnose_usb \
+    libbase \
+    libcutils \
+    libgtest_host \
+
+fastboot_stl := libc++_static
+
+#
+# Build host libfastboot.
+#
+
 include $(CLEAR_VARS)
-
-LOCAL_CFLAGS += -DFASTBOOT_VERSION="\"$(tool_version)\""
-
-LOCAL_C_INCLUDES := \
-  $(LOCAL_PATH)/../adb \
-
-LOCAL_HEADER_LIBRARIES := bootimg_headers
+LOCAL_MODULE := libfastboot
+LOCAL_MODULE_HOST_OS := darwin linux windows
 
 LOCAL_SRC_FILES := \
     bootimg_utils.cpp \
@@ -36,92 +57,83 @@
     udp.cpp \
     util.cpp \
 
-LOCAL_MODULE := fastboot
-LOCAL_MODULE_TAGS := debug
-LOCAL_MODULE_HOST_OS := darwin linux windows
-LOCAL_CFLAGS += -Wall -Wextra -Werror -Wunreachable-code
-LOCAL_REQUIRED_MODULES := mke2fs make_f2fs
-
-LOCAL_SRC_FILES_linux := usb_linux.cpp
-LOCAL_STATIC_LIBRARIES_linux := libselinux
-LOCAL_REQUIRED_MODULES_linux := e2fsdroid mke2fs.conf sload_f2fs
-
 LOCAL_SRC_FILES_darwin := usb_osx.cpp
-LOCAL_STATIC_LIBRARIES_darwin := libselinux
-LOCAL_REQUIRED_MODULES_darwin := e2fsdroid mke2fs.conf sload_f2fs
-LOCAL_LDLIBS_darwin := -lpthread -framework CoreFoundation -framework IOKit -framework Carbon
-LOCAL_CFLAGS_darwin := -Wno-unused-parameter
-
+LOCAL_SRC_FILES_linux := usb_linux.cpp
 LOCAL_SRC_FILES_windows := usb_windows.cpp
-LOCAL_SHARED_LIBRARIES_windows := AdbWinApi
-LOCAL_REQUIRED_MODULES_windows := AdbWinUsbApi
-LOCAL_LDLIBS_windows := -lws2_32
+
 LOCAL_C_INCLUDES_windows := development/host/windows/usb/api
+LOCAL_CFLAGS := $(fastboot_cflags)
+LOCAL_CFLAGS_darwin := $(fastboot_cflags_darwin)
+LOCAL_CXX_STL := $(fastboot_stl)
+LOCAL_HEADER_LIBRARIES := bootimg_headers
+LOCAL_LDLIBS_darwin := $(fastboot_ldlibs_darwin)
+LOCAL_LDLIBS_windows := $(fastboot_ldlibs_windows)
+LOCAL_SHARED_LIBRARIES := $(fastboot_shared_libs)
+LOCAL_STATIC_LIBRARIES := $(fastboot_static_libs)
+include $(BUILD_HOST_STATIC_LIBRARY)
 
-LOCAL_STATIC_LIBRARIES := \
-    libziparchive \
-    libsparse \
-    libutils \
-    liblog \
-    libz \
-    libdiagnose_usb \
-    libbase \
-    libcutils \
-    libgtest_host \
+#
+# Build host fastboot / fastboot.exe
+#
 
-LOCAL_CXX_STL := libc++_static
+include $(CLEAR_VARS)
+LOCAL_MODULE := fastboot
+LOCAL_MODULE_HOST_OS := darwin linux windows
 
-# Don't add anything here, we don't want additional shared dependencies
-# on the host fastboot tool, and shared libraries that link against libc++
-# will violate ODR
-LOCAL_SHARED_LIBRARIES :=
-
+LOCAL_CFLAGS := $(fastboot_cflags)
+LOCAL_CFLAGS_darwin := $(fastboot_cflags_darwin)
+LOCAL_CXX_STL := $(fastboot_stl)
+LOCAL_HEADER_LIBRARIES := bootimg_headers
+LOCAL_LDLIBS_darwin := $(fastboot_ldlibs_darwin)
+LOCAL_LDLIBS_windows := $(fastboot_ldlibs_windows)
+LOCAL_REQUIRED_MODULES := mke2fs make_f2fs
+LOCAL_REQUIRED_MODULES_darwin := e2fsdroid mke2fs.conf sload_f2fs
+LOCAL_REQUIRED_MODULES_linux := e2fsdroid mke2fs.conf sload_f2fs
+LOCAL_REQUIRED_MODULES_windows := AdbWinUsbApi
+LOCAL_SRC_FILES := main.cpp
+LOCAL_SHARED_LIBRARIES := $(fastboot_shared_libs)
+LOCAL_SHARED_LIBRARIES_windows := AdbWinApi
+LOCAL_STATIC_LIBRARIES := libfastboot $(fastboot_static_libs)
 include $(BUILD_HOST_EXECUTABLE)
 
-my_dist_files := $(LOCAL_BUILT_MODULE)
-my_dist_files += $(HOST_OUT_EXECUTABLES)/mke2fs$(HOST_EXECUTABLE_SUFFIX)
-my_dist_files += $(HOST_OUT_EXECUTABLES)/e2fsdroid$(HOST_EXECUTABLE_SUFFIX)
-my_dist_files += $(HOST_OUT_EXECUTABLES)/make_f2fs$(HOST_EXECUTABLE_SUFFIX)
-my_dist_files += $(HOST_OUT_EXECUTABLES)/sload_f2fs$(HOST_EXECUTABLE_SUFFIX)
+#
+# Package fastboot-related executables.
+#
+
+my_dist_files := $(HOST_OUT_EXECUTABLES)/fastboot
+my_dist_files += $(HOST_OUT_EXECUTABLES)/mke2fs
+my_dist_files += $(HOST_OUT_EXECUTABLES)/e2fsdroid
+my_dist_files += $(HOST_OUT_EXECUTABLES)/make_f2fs
+my_dist_files += $(HOST_OUT_EXECUTABLES)/sload_f2fs
 $(call dist-for-goals,dist_files sdk win_sdk,$(my_dist_files))
 ifdef HOST_CROSS_OS
-# Archive fastboot.exe for win_sdk build.
-$(call dist-for-goals,win_sdk,$(ALL_MODULES.host_cross_fastboot.BUILT))
+$(call dist-for-goals,dist_files sdk win_sdk,$(ALL_MODULES.host_cross_fastboot.BUILT))
 endif
 my_dist_files :=
 
-ifeq ($(HOST_OS),linux)
-include $(CLEAR_VARS)
-LOCAL_SRC_FILES := usbtest.cpp usb_linux.cpp util.cpp
-LOCAL_MODULE := usbtest
-LOCAL_CFLAGS := -Werror
-LOCAL_STATIC_LIBRARIES := libbase
-include $(BUILD_HOST_EXECUTABLE)
-endif
+#
+# Build host fastboot_test.
+#
 
-# fastboot_test
-# =========================================================
 include $(CLEAR_VARS)
-
 LOCAL_MODULE := fastboot_test
 LOCAL_MODULE_HOST_OS := darwin linux windows
+LOCAL_MODULE_HOST_CROSS_ARCH := x86 # Avoid trying to build for win64.
 
 LOCAL_SRC_FILES := \
-    socket.cpp \
+    fastboot_test.cpp \
     socket_mock.cpp \
     socket_test.cpp \
-    tcp.cpp \
     tcp_test.cpp \
-    udp.cpp \
     udp_test.cpp \
 
-LOCAL_STATIC_LIBRARIES := libbase libcutils
-
-LOCAL_CFLAGS += -Wall -Wextra -Werror -Wunreachable-code
-
-LOCAL_LDLIBS_darwin := -lpthread -framework CoreFoundation -framework IOKit -framework Carbon
-LOCAL_CFLAGS_darwin := -Wno-unused-parameter
-
-LOCAL_LDLIBS_windows := -lws2_32
-
+LOCAL_CFLAGS := $(fastboot_cflags)
+LOCAL_CFLAGS_darwin := $(fastboot_cflags_darwin)
+LOCAL_CXX_STL := $(fastboot_stl)
+LOCAL_HEADER_LIBRARIES := bootimg_headers
+LOCAL_LDLIBS_darwin := $(fastboot_ldlibs_darwin)
+LOCAL_LDLIBS_windows := $(fastboot_ldlibs_windows)
+LOCAL_SHARED_LIBRARIES := $(fastboot_shared_libs)
+LOCAL_SHARED_LIBRARIES_windows := AdbWinApi
+LOCAL_STATIC_LIBRARIES := libfastboot $(fastboot_static_libs)
 include $(BUILD_HOST_NATIVE_TEST)
diff --git a/fastboot/bootimg_utils.cpp b/fastboot/bootimg_utils.cpp
index 2e8c334..c9814e4 100644
--- a/fastboot/bootimg_utils.cpp
+++ b/fastboot/bootimg_utils.cpp
@@ -34,16 +34,15 @@
 #include <stdlib.h>
 #include <string.h>
 
-void bootimg_set_cmdline(boot_img_hdr_v1* h, const char* cmdline) {
-    if (strlen(cmdline) >= sizeof(h->cmdline)) die("command line too large: %zu", strlen(cmdline));
-    strcpy(reinterpret_cast<char*>(h->cmdline), cmdline);
+void bootimg_set_cmdline(boot_img_hdr_v1* h, const std::string& cmdline) {
+    if (cmdline.size() >= sizeof(h->cmdline)) die("command line too large: %zu", cmdline.size());
+    strcpy(reinterpret_cast<char*>(h->cmdline), cmdline.c_str());
 }
 
-boot_img_hdr_v1* mkbootimg(void* kernel, int64_t kernel_size, off_t kernel_offset, void* ramdisk,
-                           int64_t ramdisk_size, off_t ramdisk_offset, void* second,
-                           int64_t second_size, off_t second_offset, size_t page_size, size_t base,
-                           off_t tags_offset, uint32_t header_version, int64_t* bootimg_size) {
-    size_t page_mask = page_size - 1;
+boot_img_hdr_v1* mkbootimg(void* kernel, int64_t kernel_size, void* ramdisk, int64_t ramdisk_size,
+                           void* second, int64_t second_size, size_t base,
+                           const boot_img_hdr_v1& src, int64_t* bootimg_size) {
+    const size_t page_mask = src.page_size - 1;
 
     int64_t header_actual = (sizeof(boot_img_hdr_v1) + page_mask) & (~page_mask);
     int64_t kernel_actual = (kernel_size + page_mask) & (~page_mask);
@@ -53,30 +52,26 @@
     *bootimg_size = header_actual + kernel_actual + ramdisk_actual + second_actual;
 
     boot_img_hdr_v1* hdr = reinterpret_cast<boot_img_hdr_v1*>(calloc(*bootimg_size, 1));
-    if (hdr == nullptr) {
-        return hdr;
-    }
+    if (hdr == nullptr) die("couldn't allocate boot image: %" PRId64 " bytes", *bootimg_size);
 
+    *hdr = src;
     memcpy(hdr->magic, BOOT_MAGIC, BOOT_MAGIC_SIZE);
 
     hdr->kernel_size =  kernel_size;
     hdr->ramdisk_size = ramdisk_size;
     hdr->second_size =  second_size;
 
-    hdr->kernel_addr =  base + kernel_offset;
-    hdr->ramdisk_addr = base + ramdisk_offset;
-    hdr->second_addr =  base + second_offset;
-    hdr->tags_addr =    base + tags_offset;
+    hdr->kernel_addr += base;
+    hdr->ramdisk_addr += base;
+    hdr->second_addr += base;
+    hdr->tags_addr += base;
 
-    hdr->page_size =    page_size;
-
-    if (header_version) {
-        hdr->header_version = header_version;
+    if (hdr->header_version != 0) {
         hdr->header_size = sizeof(boot_img_hdr_v1);
     }
 
-    memcpy(hdr->magic + page_size, kernel, kernel_size);
-    memcpy(hdr->magic + page_size + kernel_actual, ramdisk, ramdisk_size);
-    memcpy(hdr->magic + page_size + kernel_actual + ramdisk_actual, second, second_size);
+    memcpy(hdr->magic + hdr->page_size, kernel, kernel_size);
+    memcpy(hdr->magic + hdr->page_size + kernel_actual, ramdisk, ramdisk_size);
+    memcpy(hdr->magic + hdr->page_size + kernel_actual + ramdisk_actual, second, second_size);
     return hdr;
 }
diff --git a/fastboot/bootimg_utils.h b/fastboot/bootimg_utils.h
index d3993f5..fe805b0 100644
--- a/fastboot/bootimg_utils.h
+++ b/fastboot/bootimg_utils.h
@@ -26,17 +26,15 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _FASTBOOT_BOOTIMG_UTILS_H_
-#define _FASTBOOT_BOOTIMG_UTILS_H_
+#pragma once
 
 #include <bootimg.h>
 #include <inttypes.h>
 #include <sys/types.h>
 
-void bootimg_set_cmdline(boot_img_hdr_v1* h, const char* cmdline);
-boot_img_hdr_v1* mkbootimg(void* kernel, int64_t kernel_size, off_t kernel_offset, void* ramdisk,
-                           int64_t ramdisk_size, off_t ramdisk_offset, void* second,
-                           int64_t second_size, off_t second_offset, size_t page_size, size_t base,
-                           off_t tags_offset, uint32_t header_version, int64_t* bootimg_size);
+#include <string>
 
-#endif
+boot_img_hdr_v1* mkbootimg(void* kernel, int64_t kernel_size, void* ramdisk, int64_t ramdisk_size,
+                           void* second, int64_t second_size, size_t base,
+                           const boot_img_hdr_v1& src, int64_t* bootimg_size);
+void bootimg_set_cmdline(boot_img_hdr_v1* h, const std::string& cmdline);
diff --git a/fastboot/engine.cpp b/fastboot/engine.cpp
index 60b7124..f271d09 100644
--- a/fastboot/engine.cpp
+++ b/fastboot/engine.cpp
@@ -42,6 +42,8 @@
 
 #include <android-base/stringprintf.h>
 
+#include "transport.h"
+
 enum Op {
     OP_DOWNLOAD,
     OP_COMMAND,
@@ -109,32 +111,32 @@
 
 void fb_set_active(const std::string& slot) {
     Action& a = queue_action(OP_COMMAND, "set_active:" + slot);
-    a.msg = "Setting current slot to '" + slot + "'...";
+    a.msg = "Setting current slot to '" + slot + "'";
 }
 
 void fb_queue_erase(const std::string& partition) {
     Action& a = queue_action(OP_COMMAND, "erase:" + partition);
-    a.msg = "Erasing '" + partition + "'...";
+    a.msg = "Erasing '" + partition + "'";
 }
 
 void fb_queue_flash_fd(const std::string& partition, int fd, uint32_t sz) {
     Action& a = queue_action(OP_DOWNLOAD_FD, "");
     a.fd = fd;
     a.size = sz;
-    a.msg = android::base::StringPrintf("Sending '%s' (%d KB)...", partition.c_str(), sz / 1024);
+    a.msg = android::base::StringPrintf("Sending '%s' (%u KB)", partition.c_str(), sz / 1024);
 
     Action& b = queue_action(OP_COMMAND, "flash:" + partition);
-    b.msg = "Writing '" + partition + "'...";
+    b.msg = "Writing '" + partition + "'";
 }
 
 void fb_queue_flash(const std::string& partition, void* data, uint32_t sz) {
     Action& a = queue_action(OP_DOWNLOAD, "");
     a.data = data;
     a.size = sz;
-    a.msg = android::base::StringPrintf("Sending '%s' (%d KB)...", partition.c_str(), sz / 1024);
+    a.msg = android::base::StringPrintf("Sending '%s' (%u KB)", partition.c_str(), sz / 1024);
 
     Action& b = queue_action(OP_COMMAND, "flash:" + partition);
-    b.msg = "Writing '" + partition + "'...";
+    b.msg = "Writing '" + partition + "'";
 }
 
 void fb_queue_flash_sparse(const std::string& partition, struct sparse_file* s, uint32_t sz,
@@ -142,12 +144,12 @@
     Action& a = queue_action(OP_DOWNLOAD_SPARSE, "");
     a.data = s;
     a.size = 0;
-    a.msg = android::base::StringPrintf("Sending sparse '%s' %zu/%zu (%d KB)...", partition.c_str(),
+    a.msg = android::base::StringPrintf("Sending sparse '%s' %zu/%zu (%u KB)", partition.c_str(),
                                         current, total, sz / 1024);
 
     Action& b = queue_action(OP_COMMAND, "flash:" + partition);
-    b.msg =
-        android::base::StringPrintf("Writing '%s' %zu/%zu...", partition.c_str(), current, total);
+    b.msg = android::base::StringPrintf("Writing sparse '%s' %zu/%zu", partition.c_str(), current,
+                                        total);
 }
 
 static int match(const char* str, const char** value, unsigned count) {
@@ -270,7 +272,7 @@
 void fb_queue_reboot() {
     Action& a = queue_action(OP_COMMAND, "reboot");
     a.func = cb_do_nothing;
-    a.msg = "Rebooting...";
+    a.msg = "Rebooting";
 }
 
 void fb_queue_command(const std::string& cmd, const std::string& msg) {
@@ -289,7 +291,7 @@
     Action& a = queue_action(OP_DOWNLOAD_FD, "");
     a.fd = fd;
     a.size = sz;
-    a.msg = android::base::StringPrintf("Sending '%s' (%d KB)", name.c_str(), sz / 1024);
+    a.msg = android::base::StringPrintf("Sending '%s' (%u KB)", name.c_str(), sz / 1024);
 }
 
 void fb_queue_upload(const std::string& outfile) {
@@ -312,7 +314,8 @@
     for (auto& a : action_list) {
         a->start = now();
         if (!a->msg.empty()) {
-            fprintf(stderr, "%s\n", a->msg.c_str());
+            fprintf(stderr, "%-50s ", a->msg.c_str());
+            verbose("\n");
         }
         if (a->op == OP_DOWNLOAD) {
             status = fb_download_data(transport, a->data, a->size);
@@ -333,6 +336,7 @@
             if (status) break;
         } else if (a->op == OP_NOTICE) {
             // We already showed the notice because it's in `Action::msg`.
+            fprintf(stderr, "\n");
         } else if (a->op == OP_DOWNLOAD_SPARSE) {
             status = fb_download_data_sparse(transport, reinterpret_cast<sparse_file*>(a->data));
             status = a->func(*a, status, status ? fb_get_error().c_str() : "");
diff --git a/fastboot/fastboot.bash b/fastboot/fastboot.bash
new file mode 100644
index 0000000..dca3b4e
--- /dev/null
+++ b/fastboot/fastboot.bash
@@ -0,0 +1,182 @@
+# /* vim: set ai ts=4 ft=sh: */
+#
+# Copyright 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.
+#
+
+_fastboot() {
+    if ! type -t "$1" >/dev/null; then
+        return
+    fi
+
+    if type -t _init_completion >/dev/null; then
+        _init_completion || return
+    fi
+
+    local where i cur serial
+    COMPREPLY=()
+
+    serial="${ANDROID_SERIAL:-none}"
+    where=OPTIONS
+    for ((i=1; i <= COMP_CWORD; i++)); do
+        cur="${COMP_WORDS[i]}"
+        case "${cur}" in
+            -s)
+                where=OPT_SERIAL
+                ;;
+            --slot)
+                where=OPT_SLOT
+                ;;
+            -*)
+                where=OPTIONS
+                ;;
+            *)
+                if [[ $where == OPT_SERIAL ]]; then
+                    where=OPT_SERIAL_ARG
+                    serial=${cur}
+                elif [[ $where == OPT_SLOT ]]; then
+                    where=OPT_SLOT_ARG
+                else
+                    where=COMMAND
+                    break
+                fi
+                ;;
+        esac
+    done
+
+    if [[ $where == COMMAND && $i -ge $COMP_CWORD ]]; then
+        where=OPTIONS
+    fi
+
+    OPTIONS="-a -c --disable-verification --disable-verity -h --help -s --set-active --skip-secondary --skip-reboot --slot -u --version -w"
+    COMMAND="continue devices erase flash flashall flashing format getvar get_staged help oem reboot stage update"
+
+    case $where in
+        OPTIONS|OPT_SERIAL)
+            COMPREPLY=( $(compgen -W "$OPTIONS $COMMAND" -- "$cur") )
+            ;;
+        OPT_SERIAL_ARG)
+            local devices=$(command fastboot devices 2> /dev/null | awk '{ print $1 }')
+            COMPREPLY=( $(compgen -W "${devices}" -- ${cur}) )
+            ;;
+        OPT_SLOT_ARG)
+            local slots="a all b other"
+            COMPREPLY=( $(compgen -W "${slots}" -- ${cur}) )
+            ;;
+        COMMAND)
+            if [[ $i -eq $COMP_CWORD ]]; then
+                COMPREPLY=( $(compgen -W "$COMMAND" -- "$cur") )
+            else
+                i=$((i+1))
+                case "${cur}" in
+                    flash)
+                        _fastboot_cmd_flash "$serial" $i
+                        ;;
+                    reboot)
+                        if [[ $COMP_CWORD == $i ]]; then
+                            args="bootloader"
+                            COMPREPLY=( $(compgen -W "${args}" -- "${COMP_WORDS[i]}") )
+                        fi
+                        ;;
+                    update)
+                        _fastboot_cmd_update "$serial" $i
+                        ;;
+                esac
+            fi
+            ;;
+    esac
+
+    return 0
+}
+
+_fastboot_cmd_flash() {
+    local serial i cur
+    local partitions
+
+    serial=$1
+    i=$2
+
+    cur="${COMP_WORDS[COMP_CWORD]}"
+    if [[ $i -eq $COMP_CWORD ]]; then
+        partitions="boot bootloader dtbo modem odm oem product radio recovery system vbmeta vendor"
+        COMPREPLY=( $(compgen -W "$partitions" -- $cur) )
+    else
+        _fastboot_util_complete_local_file "${cur}" '!*.img'
+    fi
+}
+
+_fastboot_cmd_update() {
+    local serial i cur
+
+    serial=$1
+    i=$2
+
+    cur="${COMP_WORDS[COMP_CWORD]}"
+
+    _fastboot_util_complete_local_file "${cur}" '!*.zip'
+}
+
+_fastboot_util_complete_local_file() {
+    local file xspec i j IFS=$'\n'
+    local -a dirs files
+
+    file=$1
+    xspec=$2
+
+    # Since we're probably doing file completion here, don't add a space after.
+    if [[ $(type -t compopt) = "builtin" ]]; then
+        compopt -o plusdirs
+        if [[ "${xspec}" == "" ]]; then
+            COMPREPLY=( ${COMPREPLY[@]:-} $(compgen -f -- "${cur}") )
+        else
+            compopt +o filenames
+            COMPREPLY=( ${COMPREPLY[@]:-} $(compgen -f -X "${xspec}" -- "${cur}") )
+        fi
+    else
+        # Work-around for shells with no compopt
+
+        dirs=( $(compgen -d -- "${cur}" ) )
+
+        if [[ "${xspec}" == "" ]]; then
+            files=( ${COMPREPLY[@]:-} $(compgen -f -- "${cur}") )
+        else
+            files=( ${COMPREPLY[@]:-} $(compgen -f -X "${xspec}" -- "${cur}") )
+        fi
+
+        COMPREPLY=( $(
+            for i in "${files[@]}"; do
+                local skip=
+                for j in "${dirs[@]}"; do
+                    if [[ $i == $j ]]; then
+                        skip=1
+                        break
+                    fi
+                done
+                [[ -n $skip ]] || printf "%s\n" "$i"
+            done
+        ))
+
+        COMPREPLY=( ${COMPREPLY[@]:-} $(
+            for i in "${dirs[@]}"; do
+                printf "%s/\n" "$i"
+            done
+        ))
+    fi
+}
+
+if [[ $(type -t compopt) = "builtin" ]]; then
+    complete -F _fastboot fastboot
+else
+    complete -o nospace -F _fastboot fastboot
+fi
diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index e89586f..5aa87d9 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -76,22 +76,18 @@
 char cur_product[FB_RESPONSE_SZ + 1];
 
 static const char* serial = nullptr;
-static const char* cmdline = nullptr;
-static unsigned short vendor_id = 0;
-static int long_listing = 0;
+
+static bool g_long_listing = false;
 // Don't resparse files in too-big chunks.
 // libsparse will support INT_MAX, but this results in large allocations, so
 // let's keep it at 1GB to avoid memory pressure on the host.
 static constexpr int64_t RESPARSE_LIMIT = 1 * 1024 * 1024 * 1024;
-static int64_t sparse_limit = -1;
+static uint64_t sparse_limit = 0;
 static int64_t target_sparse_limit = -1;
 
-static unsigned page_size = 2048;
-static unsigned base_addr      = 0x10000000;
-static unsigned kernel_offset  = 0x00008000;
-static unsigned ramdisk_offset = 0x01000000;
-static unsigned second_offset  = 0x00f00000;
-static unsigned tags_offset    = 0x00000100;
+static unsigned g_base_addr = 0x10000000;
+static boot_img_hdr_v1 g_boot_img_hdr = {};
+static std::string g_cmdline;
 
 static bool g_disable_verity = false;
 static bool g_disable_verification = false;
@@ -193,11 +189,6 @@
 }
 
 static int match_fastboot_with_serial(usb_ifc_info* info, const char* local_serial) {
-    // Require a matching vendor id if the user specified one with -i.
-    if (vendor_id != 0 && info->dev_vendor != vendor_id) {
-        return -1;
-    }
-
     if (info->ifc_class != 0xff || info->ifc_subclass != 0x42 || info->ifc_protocol != 0x03) {
         return -1;
     }
@@ -223,7 +214,7 @@
             serial = "????????????";
         }
         // output compatible with "adb devices"
-        if (!long_listing) {
+        if (!g_long_listing) {
             printf("%s\tfastboot", serial.c_str());
         } else {
             printf("%-22s fastboot", serial.c_str());
@@ -238,7 +229,7 @@
 // Opens a new Transport connected to a device. If |serial| is non-null it will be used to identify
 // a specific device, otherwise the first USB device found will be used.
 //
-// If |serial| is non-null but invalid, this prints an error message to stderr and returns nullptr.
+// If |serial| is non-null but invalid, this exits.
 // Otherwise it blocks until the target is available.
 //
 // The returned Transport is a singleton, so multiple calls to this function will return the same
@@ -270,9 +261,7 @@
         if (net_address != nullptr) {
             std::string error;
             if (!android::base::ParseNetAddress(net_address, &host, &port, nullptr, &error)) {
-                fprintf(stderr, "error: Invalid network address '%s': %s\n", net_address,
-                        error.c_str());
-                return nullptr;
+                die("invalid network address '%s': %s\n", net_address, error.c_str());
             }
         }
     }
@@ -327,126 +316,89 @@
 static int show_help() {
     // clang-format off
     fprintf(stdout,
-/*           1234567890123456789012345678901234567890123456789012345678901234567890123456 */
-            "usage: fastboot [ <option> ] <command>\n"
+//                    1         2         3         4         5         6         7         8
+//           12345678901234567890123456789012345678901234567890123456789012345678901234567890
+            "usage: fastboot [OPTION...] COMMAND...\n"
             "\n"
-            "commands:\n"
-            "  update <filename>                        Reflash device from update.zip.\n"
-            "                                           Sets the flashed slot as active.\n"
-            "  flashall                                 Flash boot, system, vendor, and --\n"
-            "                                           if found -- recovery. If the device\n"
-            "                                           supports slots, the slot that has\n"
-            "                                           been flashed to is set as active.\n"
-            "                                           Secondary images may be flashed to\n"
-            "                                           an inactive slot.\n"
-            "  flash <partition> [ <filename> ]         Write a file to a flash partition.\n"
-            "  flashing lock                            Locks the device. Prevents flashing.\n"
-            "  flashing unlock                          Unlocks the device. Allows flashing\n"
-            "                                           any partition except\n"
-            "                                           bootloader-related partitions.\n"
-            "  flashing lock_critical                   Prevents flashing bootloader-related\n"
-            "                                           partitions.\n"
-            "  flashing unlock_critical                 Enables flashing bootloader-related\n"
-            "                                           partitions.\n"
-            "  flashing get_unlock_ability              Queries bootloader to see if the\n"
-            "                                           device is unlocked.\n"
-            "  flashing get_unlock_bootloader_nonce     Queries the bootloader to get the\n"
-            "                                           unlock nonce.\n"
-            "  flashing unlock_bootloader <request>     Issue unlock bootloader using request.\n"
-            "  flashing lock_bootloader                 Locks the bootloader to prevent\n"
-            "                                           bootloader version rollback.\n"
-            "  erase <partition>                        Erase a flash partition.\n"
-            "  format[:[<fs type>][:[<size>]] <partition>\n"
-            "                                           Format a flash partition. Can\n"
-            "                                           override the fs type and/or size\n"
-            "                                           the bootloader reports.\n"
-            "  getvar <variable>                        Display a bootloader variable.\n"
-            "  set_active <slot>                        Sets the active slot. If slots are\n"
-            "                                           not supported, this does nothing.\n"
-            "  boot <kernel> [ <ramdisk> [ <second> ] ] Download and boot kernel.\n"
-            "  flash:raw <bootable-partition> <kernel> [ <ramdisk> [ <second> ] ]\n"
-            "                                           Create bootimage and flash it.\n"
-            "  devices [-l]                             List all connected devices [with\n"
-            "                                           device paths].\n"
-            "  continue                                 Continue with autoboot.\n"
-            "  reboot [bootloader|emergency]            Reboot device [into bootloader or emergency mode].\n"
-            "  reboot-bootloader                        Reboot device into bootloader.\n"
-            "  oem <parameter1> ... <parameterN>        Executes oem specific command.\n"
-            "  stage <infile>                           Sends contents of <infile> to stage for\n"
-            "                                           the next command. Supported only on\n"
-            "                                           Android Things devices.\n"
-            "  get_staged <outfile>                     Receives data to <outfile> staged by the\n"
-            "                                           last command. Supported only on Android\n"
-            "                                           Things devices.\n"
-            "  help                                     Show this help message.\n"
+            "flashing:\n"
+            " update ZIP                 Flash all partitions from an update.zip package.\n"
+            " flashall                   Flash all partitions from $ANDROID_PRODUCT_OUT.\n"
+            "                            On A/B devices, flashed slot is set as active.\n"
+            "                            Secondary images may be flashed to inactive slot.\n"
+            " flash PARTITION [FILENAME] Flash given partition, using the image from\n"
+            "                            $ANDROID_PRODUCT_OUT if no filename is given.\n"
+            "\n"
+            "basics:\n"
+            " devices [-l]               List devices in bootloader (-l: with device paths).\n"
+            " getvar NAME                Display given bootloader variable.\n"
+            " reboot [bootloader]        Reboot device.\n"
+            "\n"
+            "locking/unlocking:\n"
+            " flashing lock|unlock       Lock/unlock partitions for flashing\n"
+            " flashing lock_critical|unlock_critical\n"
+            "                            Lock/unlock 'critical' bootloader partitions.\n"
+            " flashing get_unlock_ability\n"
+            "                            Check whether unlocking is allowed (1) or not(0).\n"
+            "\n"
+            "advanced:\n"
+            " erase PARTITION            Erase a flash partition.\n"
+            " format[:FS_TYPE[:SIZE]] PARTITION\n"
+            "                            Format a flash partition.\n"
+            " set_active SLOT            Set the active slot.\n"
+            " oem [COMMAND...]           Execute OEM-specific command.\n"
+            "\n"
+            "boot image:\n"
+            " boot KERNEL [RAMDISK [SECOND]]\n"
+            "                            Download and boot kernel from RAM.\n"
+            " flash:raw PARTITION KERNEL [RAMDISK [SECOND]]\n"
+            "                            Create boot image and flash it.\n"
+            " --cmdline CMDLINE          Override kernel command line.\n"
+            " --base ADDRESS             Set kernel base address (default: 0x10000000).\n"
+            " --kernel-offset            Set kernel offset (default: 0x00008000).\n"
+            " --ramdisk-offset           Set ramdisk offset (default: 0x01000000).\n"
+            " --tags-offset              Set tags offset (default: 0x00000100).\n"
+            " --page-size BYTES          Set flash page size (default: 2048).\n"
+            " --header-version VERSION   Set boot image header version.\n"
+            " --os-version MAJOR[.MINOR[.PATCH]]\n"
+            "                            Set boot image OS version (default: 0.0.0).\n"
+            " --os-patch-level YYYY-MM-DD\n"
+            "                            Set boot image OS security patch level.\n"
+            // TODO: still missing: `second_addr`, `name`, `id`, `recovery_dtbo_*`.
+            "\n"
+            // TODO: what device(s) used this? is there any documentation?
+            //" continue                               Continue with autoboot.\n"
+            //"\n"
+            "Android Things:\n"
+            " stage IN_FILE              Sends given file to stage for the next command.\n"
+            " get_staged OUT_FILE        Writes data staged by the last command to a file.\n"
             "\n"
             "options:\n"
-            "  -w                                       Erase userdata and cache (and format\n"
-            "                                           if supported by partition type).\n"
-            "  -u                                       Do not erase partition before\n"
-            "                                           formatting.\n"
-            "  -s <specific device>                     Specify a device. For USB, provide either\n"
-            "                                           a serial number or path to device port.\n"
-            "                                           For ethernet, provide an address in the\n"
-            "                                           form <protocol>:<hostname>[:port] where\n"
-            "                                           <protocol> is either tcp or udp.\n"
-            "  -c <cmdline>                             Override kernel commandline.\n"
-            "  -i <vendor id>                           Specify a custom USB vendor id.\n"
-            "  -b, --base <base_addr>                   Specify a custom kernel base\n"
-            "                                           address (default: 0x10000000).\n"
-            "  --kernel-offset                          Specify a custom kernel offset.\n"
-            "                                           (default: 0x00008000)\n"
-            "  --ramdisk-offset                         Specify a custom ramdisk offset.\n"
-            "                                           (default: 0x01000000)\n"
-            "  --tags-offset                            Specify a custom tags offset.\n"
-            "                                           (default: 0x00000100)\n"
-            "  -n, --page-size <page size>              Specify the nand page size\n"
-            "                                           (default: 2048).\n"
-            "  -S <size>[K|M|G]                         Automatically sparse files greater\n"
-            "                                           than 'size'. 0 to disable.\n"
-            "  --slot <slot>                            Specify slot name to be used if the\n"
-            "                                           device supports slots. All operations\n"
-            "                                           on partitions that support slots will\n"
-            "                                           be done on the slot specified.\n"
-            "                                           'all' can be given to refer to all slots.\n"
-            "                                           'other' can be given to refer to a\n"
-            "                                           non-current slot. If this flag is not\n"
-            "                                           used, slotted partitions will default\n"
-            "                                           to the current active slot.\n"
-            "  -a, --set-active[=<slot>]                Sets the active slot. If no slot is\n"
-            "                                           provided, this will default to the value\n"
-            "                                           given by --slot. If slots are not\n"
-            "                                           supported, this does nothing. This will\n"
-            "                                           run after all non-reboot commands.\n"
-            "  --skip-secondary                         Will not flash secondary slots when\n"
-            "                                           performing a flashall or update. This\n"
-            "                                           will preserve data on other slots.\n"
-            "  --skip-reboot                            Will not reboot the device when\n"
-            "                                           performing commands that normally\n"
-            "                                           trigger a reboot.\n"
-            "  --disable-verity                         Set the disable-verity flag in the\n"
-            "                                           the vbmeta image being flashed.\n"
-            "  --disable-verification                   Set the disable-verification flag in"
-            "                                           the vbmeta image being flashed.\n"
+            " -w                         Wipe userdata.\n"
+            " -s SERIAL                  Specify a USB device.\n"
+            " -s tcp|udp:HOST[:PORT]     Specify a network device.\n"
+            " -S SIZE[K|M|G]             Break into sparse files no larger than SIZE.\n"
+            " --slot SLOT                Use SLOT; 'all' for both slots, 'other' for\n"
+            "                            non-current slot (default: current active slot).\n"
+            " --set-active[=SLOT]        Sets the active slot before rebooting.\n"
+            " --skip-secondary           Don't flash secondary slots in flashall/update.\n"
+            " --skip-reboot              Don't reboot device after flashing.\n"
+            " --disable-verity           Sets disable-verity when flashing vbmeta.\n"
+            " --disable-verification     Sets disable-verification when flashing vbmeta.\n"
 #if !defined(_WIN32)
-            "  --wipe-and-use-fbe                       On devices which support it,\n"
-            "                                           erase userdata and cache, and\n"
-            "                                           enable file-based encryption\n"
+            " --wipe-and-use-fbe         Enable file-based encryption, wiping userdata.\n"
 #endif
-            "  --unbuffered                             Do not buffer input or output.\n"
-            "  --version                                Display version.\n"
-            "  --header-version                         Set boot image header version while\n"
-            "                                           using flash:raw and boot commands to \n"
-            "                                           to create a boot image.\n"
-            "  -h, --help                               show this message.\n"
+            // TODO: remove --unbuffered?
+            " --unbuffered               Don't buffer input or output.\n"
+            " --verbose, -v              Verbose output.\n"
+            " --version                  Display version.\n"
+            " --help, -h                 Show this message.\n"
         );
     // clang-format off
     return 0;
 }
 
 static void* load_bootable_image(const std::string& kernel, const std::string& ramdisk,
-                                 const std::string& second_stage, int64_t* sz,
-                                 const char* cmdline, uint32_t header_version) {
+                                 const std::string& second_stage, int64_t* sz) {
     int64_t ksize;
     void* kdata = load_file(kernel.c_str(), &ksize);
     if (kdata == nullptr) die("cannot load '%s': %s", kernel.c_str(), strerror(errno));
@@ -456,7 +408,9 @@
         die("cannot load '%s': too short", kernel.c_str());
     }
     if (!memcmp(kdata, BOOT_MAGIC, BOOT_MAGIC_SIZE)) {
-        if (cmdline) bootimg_set_cmdline(reinterpret_cast<boot_img_hdr_v1*>(kdata), cmdline);
+        if (!g_cmdline.empty()) {
+            bootimg_set_cmdline(reinterpret_cast<boot_img_hdr_v1*>(kdata), g_cmdline);
+        }
 
         if (!ramdisk.empty()) die("cannot boot a boot.img *and* ramdisk");
 
@@ -479,16 +433,12 @@
     }
 
     fprintf(stderr,"creating boot image...\n");
-    int64_t bsize = 0;
-    boot_img_hdr_v1* bdata = mkbootimg(kdata, ksize, kernel_offset,
-                      rdata, rsize, ramdisk_offset,
-                      sdata, ssize, second_offset,
-                      page_size, base_addr, tags_offset, header_version, &bsize);
+    boot_img_hdr_v1* bdata = mkbootimg(kdata, ksize, rdata, rsize, sdata, ssize,
+                                       g_base_addr, g_boot_img_hdr, sz);
     if (bdata == nullptr) die("failed to create boot.img");
 
-    if (cmdline) bootimg_set_cmdline(bdata, cmdline);
-    fprintf(stderr, "creating boot image - %" PRId64 " bytes\n", bsize);
-    *sz = bsize;
+    if (!g_cmdline.empty()) bootimg_set_cmdline(bdata, g_cmdline);
+    fprintf(stderr, "creating boot image - %" PRId64 " bytes\n", *sz);
 
     return bdata;
 }
@@ -542,7 +492,7 @@
     die("make_temporary_directory not supported under Windows, sorry!");
 }
 
-static int make_temporary_fd() {
+static int make_temporary_fd(const char* /*what*/) {
     // TODO: reimplement to avoid leaking a FILE*.
     return fileno(tmpfile());
 }
@@ -558,18 +508,18 @@
 static std::string make_temporary_directory() {
     std::string result(make_temporary_template());
     if (mkdtemp(&result[0]) == nullptr) {
-        fprintf(stderr, "Unable to create temporary directory: %s\n", strerror(errno));
-        return "";
+        die("unable to create temporary directory with template %s: %s",
+            result.c_str(), strerror(errno));
     }
     return result;
 }
 
-static int make_temporary_fd() {
+static int make_temporary_fd(const char* what) {
     std::string path_template(make_temporary_template());
     int fd = mkstemp(&path_template[0]);
     if (fd == -1) {
-        fprintf(stderr, "Unable to create temporary file: %s\n", strerror(errno));
-        return -1;
+        die("failed to create temporary file for %s with template %s: %s\n",
+            path_template.c_str(), what, strerror(errno));
     }
     unlink(path_template.c_str());
     return fd;
@@ -579,16 +529,11 @@
 
 static std::string create_fbemarker_tmpdir() {
     std::string dir = make_temporary_directory();
-    if (dir.empty()) {
-        fprintf(stderr, "Unable to create local temp directory for FBE marker\n");
-        return "";
-    }
     std::string marker_file = dir + "/" + convert_fbe_marker_filename;
     int fd = open(marker_file.c_str(), O_CREAT | O_WRONLY | O_CLOEXEC, 0666);
     if (fd == -1) {
-        fprintf(stderr, "Unable to create FBE marker file %s locally: %d, %s\n",
-            marker_file.c_str(), errno, strerror(errno));
-        return "";
+        die("unable to create FBE marker file %s locally: %s",
+            marker_file.c_str(), strerror(errno));
     }
     close(fd);
     return dir;
@@ -609,10 +554,7 @@
 }
 
 static int unzip_to_file(ZipArchiveHandle zip, const char* entry_name) {
-    unique_fd fd(make_temporary_fd());
-    if (fd == -1) {
-        die("failed to create temporary file for '%s': %s", entry_name, strerror(errno));
-    }
+    unique_fd fd(make_temporary_fd(entry_name));
 
     ZipString zip_entry_name(entry_name);
     ZipEntry zip_entry;
@@ -754,10 +696,14 @@
     fb_queue_notice("--------------------------------------------");
 }
 
-static struct sparse_file** load_sparse_files(int fd, int max_size) {
+static struct sparse_file** load_sparse_files(int fd, int64_t max_size) {
     struct sparse_file* s = sparse_file_import_auto(fd, false, true);
     if (!s) die("cannot sparse read file");
 
+    if (max_size <= 0 || max_size > std::numeric_limits<uint32_t>::max()) {
+      die("invalid max size %" PRId64, max_size);
+    }
+
     int files = sparse_file_resparse(s, max_size, nullptr, 0);
     if (files < 0) die("Failed to resparse");
 
@@ -773,8 +719,8 @@
 static int64_t get_target_sparse_limit(Transport* transport) {
     std::string max_download_size;
     if (!fb_getvar(transport, "max-download-size", &max_download_size) ||
-            max_download_size.empty()) {
-        fprintf(stderr, "target didn't report max-download-size\n");
+        max_download_size.empty()) {
+        verbose("target didn't report max-download-size");
         return 0;
     }
 
@@ -786,20 +732,15 @@
         fprintf(stderr, "couldn't parse max-download-size '%s'\n", max_download_size.c_str());
         return 0;
     }
-    if (limit > 0) {
-        fprintf(stderr, "target reported max download size of %" PRId64 " bytes\n", limit);
-    }
+    if (limit > 0) verbose("target reported max download size of %" PRId64 " bytes", limit);
     return limit;
 }
 
 static int64_t get_sparse_limit(Transport* transport, int64_t size) {
-    int64_t limit;
-
-    if (sparse_limit == 0) {
-        return 0;
-    } else if (sparse_limit > 0) {
-        limit = sparse_limit;
-    } else {
+    int64_t limit = sparse_limit;
+    if (limit == 0) {
+        // Unlimited, so see what the target device's limit is.
+        // TODO: shouldn't we apply this limit even if you've used -S?
         if (target_sparse_limit == -1) {
             target_sparse_limit = get_target_sparse_limit(transport);
         }
@@ -817,17 +758,6 @@
     return 0;
 }
 
-// Until we get lazy inode table init working in make_ext4fs, we need to
-// erase partitions of type ext4 before flashing a filesystem so no stale
-// inodes are left lying around.  Otherwise, e2fsck gets very upset.
-static bool needs_erase(Transport* transport, const char* partition) {
-    std::string partition_type;
-    if (!fb_getvar(transport, std::string("partition-type:") + partition, &partition_type)) {
-        return false;
-    }
-    return partition_type == "ext4";
-}
-
 static bool load_buf_fd(Transport* transport, int fd, struct fastboot_buffer* buf) {
     int64_t sz = get_file_size(fd);
     if (sz == -1) {
@@ -879,10 +809,7 @@
         return;
     }
 
-    int fd = make_temporary_fd();
-    if (fd == -1) {
-        die("Failed to create temporary file for vbmeta rewriting");
-    }
+    int fd = make_temporary_fd("vbmeta rewriting");
 
     std::string data;
     if (!android::base::ReadFdToString(buf->fd, &data)) {
@@ -944,46 +871,18 @@
     }
 }
 
-static std::string get_current_slot(Transport* transport)
-{
+static std::string get_current_slot(Transport* transport) {
     std::string current_slot;
-    if (fb_getvar(transport, "current-slot", &current_slot)) {
-        if (current_slot == "_a") return "a"; // Legacy support
-        if (current_slot == "_b") return "b"; // Legacy support
-        return current_slot;
-    }
-    return "";
-}
-
-// Legacy support
-static std::vector<std::string> get_suffixes_obsolete(Transport* transport) {
-    std::vector<std::string> suffixes;
-    std::string suffix_list;
-    if (!fb_getvar(transport, "slot-suffixes", &suffix_list)) {
-        return suffixes;
-    }
-    suffixes = android::base::Split(suffix_list, ",");
-    // Unfortunately some devices will return an error message in the
-    // guise of a valid value. If we only see only one suffix, it's probably
-    // not real.
-    if (suffixes.size() == 1) {
-        suffixes.clear();
-    }
-    return suffixes;
-}
-
-// Legacy support
-static bool supports_AB_obsolete(Transport* transport) {
-  return !get_suffixes_obsolete(transport).empty();
+    if (!fb_getvar(transport, "current-slot", &current_slot)) return "";
+    return current_slot;
 }
 
 static int get_slot_count(Transport* transport) {
     std::string var;
-    int count;
-    if (!fb_getvar(transport, "slot-count", &var)) {
-        if (supports_AB_obsolete(transport)) return 2; // Legacy support
+    int count = 0;
+    if (!fb_getvar(transport, "slot-count", &var) || !android::base::ParseInt(var, &count)) {
+        return 0;
     }
-    if (!android::base::ParseInt(var, &count)) return 0;
     return count;
 }
 
@@ -1013,8 +912,6 @@
 
 static std::string verify_slot(Transport* transport, const std::string& slot_name, bool allow_all) {
     std::string slot = slot_name;
-    if (slot == "_a") slot = "a"; // Legacy support
-    if (slot == "_b") slot = "b"; // Legacy support
     if (slot == "all") {
         if (allow_all) {
             return "all";
@@ -1126,25 +1023,19 @@
 // Sets slot_override as the active slot. If slot_override is blank,
 // set current slot as active instead. This clears slot-unbootable.
 static void set_active(Transport* transport, const std::string& slot_override) {
-    std::string separator = "";
-    if (!supports_AB(transport)) {
-        if (supports_AB_obsolete(transport)) {
-            separator = "_"; // Legacy support
-        } else {
-            return;
-        }
-    }
+    if (!supports_AB(transport)) return;
+
     if (slot_override != "") {
-        fb_set_active(separator + slot_override);
+        fb_set_active(slot_override);
     } else {
         std::string current_slot = get_current_slot(transport);
         if (current_slot != "") {
-            fb_set_active(separator + current_slot);
+            fb_set_active(current_slot);
         }
     }
 }
 
-static void do_update(Transport* transport, const char* filename, const std::string& slot_override, bool erase_first, bool skip_secondary) {
+static void do_update(Transport* transport, const char* filename, const std::string& slot_override, bool skip_secondary) {
     queue_info_dump();
 
     fb_queue_query_save("product", cur_product, sizeof(cur_product));
@@ -1202,9 +1093,6 @@
 
         auto update = [&](const std::string& partition) {
             do_update_signature(zip, images[i].sig_name);
-            if (erase_first && needs_erase(transport, partition.c_str())) {
-                fb_queue_erase(partition);
-            }
             flash_buf(partition.c_str(), &buf);
             /* not closing the fd here since the sparse code keeps the fd around
              * but hasn't mmaped data yet. The temporary file will get cleaned up when the
@@ -1237,7 +1125,7 @@
     fb_queue_command("signature", "installing signature");
 }
 
-static void do_flashall(Transport* transport, const std::string& slot_override, int erase_first, bool skip_secondary) {
+static void do_flashall(Transport* transport, const std::string& slot_override, bool skip_secondary) {
     std::string fname;
     queue_info_dump();
 
@@ -1284,9 +1172,6 @@
 
         auto flashall = [&](const std::string &partition) {
             do_send_signature(fname.c_str());
-            if (erase_first && needs_erase(transport, partition.c_str())) {
-                fb_queue_erase(partition);
-            }
             flash_buf(partition.c_str(), &buf);
         };
         do_for_partitions(transport, images[i].part_name, slot, flashall, false);
@@ -1306,18 +1191,6 @@
     return result;
 }
 
-static void do_bypass_unlock_command(std::vector<std::string>* args) {
-    if (args->empty()) syntax_error("missing unlock_bootloader request");
-
-    std::string filename = next_arg(args);
-
-    int64_t sz;
-    void* data = load_file(filename.c_str(), &sz);
-    if (data == nullptr) die("could not load '%s': %s", filename.c_str(), strerror(errno));
-    fb_queue_download("unlock_message", data, sz);
-    fb_queue_command("flashing unlock_bootloader", "unlocking bootloader");
-}
-
 static void do_oem_command(const std::string& cmd, std::vector<std::string>* args) {
     if (args->empty()) syntax_error("empty oem command");
 
@@ -1328,47 +1201,6 @@
     fb_queue_command(command, "");
 }
 
-static int64_t parse_num(const char *arg)
-{
-    char *endptr;
-    unsigned long long num;
-
-    num = strtoull(arg, &endptr, 0);
-    if (endptr == arg) {
-        return -1;
-    }
-
-    if (*endptr == 'k' || *endptr == 'K') {
-        if (num >= (-1ULL) / 1024) {
-            return -1;
-        }
-        num *= 1024LL;
-        endptr++;
-    } else if (*endptr == 'm' || *endptr == 'M') {
-        if (num >= (-1ULL) / (1024 * 1024)) {
-            return -1;
-        }
-        num *= 1024LL * 1024LL;
-        endptr++;
-    } else if (*endptr == 'g' || *endptr == 'G') {
-        if (num >= (-1ULL) / (1024 * 1024 * 1024)) {
-            return -1;
-        }
-        num *= 1024LL * 1024LL * 1024LL;
-        endptr++;
-    }
-
-    if (*endptr != '\0') {
-        return -1;
-    }
-
-    if (num > INT64_MAX) {
-        return -1;
-    }
-
-    return num;
-}
-
 static std::string fb_fix_numeric_var(std::string var) {
     // Some bootloaders (angler, for example), send spurious leading whitespace.
     var = android::base::Trim(var);
@@ -1491,45 +1323,46 @@
     fprintf(stderr, "FAILED (%s)\n", fb_get_error().c_str());
 }
 
-int main(int argc, char **argv)
-{
+int FastBoot::Main(int argc, char* argv[]) {
     bool wants_wipe = false;
     bool wants_reboot = false;
     bool wants_reboot_bootloader = false;
-    bool wants_reboot_emergency = false;
     bool skip_reboot = false;
     bool wants_set_active = false;
     bool skip_secondary = false;
-    bool erase_first = true;
     bool set_fbe_marker = false;
     void *data;
-    uint32_t header_version = 0;
     int64_t sz;
     int longindex;
     std::string slot_override;
     std::string next_active;
 
+    g_boot_img_hdr.kernel_addr = 0x00008000;
+    g_boot_img_hdr.ramdisk_addr = 0x01000000;
+    g_boot_img_hdr.second_addr = 0x00f00000;
+    g_boot_img_hdr.tags_addr = 0x00000100;
+    g_boot_img_hdr.page_size = 2048;
+
     const struct option longopts[] = {
-        {"base", required_argument, 0, 'b'},
-        {"kernel_offset", required_argument, 0, 'k'},
-        {"kernel-offset", required_argument, 0, 'k'},
-        {"page_size", required_argument, 0, 'n'},
-        {"page-size", required_argument, 0, 'n'},
-        {"ramdisk_offset", required_argument, 0, 'r'},
-        {"ramdisk-offset", required_argument, 0, 'r'},
-        {"tags_offset", required_argument, 0, 't'},
-        {"tags-offset", required_argument, 0, 't'},
-        {"help", no_argument, 0, 'h'},
-        {"unbuffered", no_argument, 0, 0},
-        {"version", no_argument, 0, 0},
-        {"slot", required_argument, 0, 0},
-        {"set_active", optional_argument, 0, 'a'},
-        {"set-active", optional_argument, 0, 'a'},
-        {"skip-secondary", no_argument, 0, 0},
-        {"skip-reboot", no_argument, 0, 0},
-        {"disable-verity", no_argument, 0, 0},
+        {"base", required_argument, 0, 0},
+        {"cmdline", required_argument, 0, 0},
         {"disable-verification", no_argument, 0, 0},
+        {"disable-verity", no_argument, 0, 0},
         {"header-version", required_argument, 0, 0},
+        {"help", no_argument, 0, 'h'},
+        {"kernel-offset", required_argument, 0, 0},
+        {"os-patch-level", required_argument, 0, 0},
+        {"os-version", required_argument, 0, 0},
+        {"page-size", required_argument, 0, 0},
+        {"ramdisk-offset", required_argument, 0, 0},
+        {"set-active", optional_argument, 0, 'a'},
+        {"skip-reboot", no_argument, 0, 0},
+        {"skip-secondary", no_argument, 0, 0},
+        {"slot", required_argument, 0, 0},
+        {"tags-offset", required_argument, 0, 0},
+        {"unbuffered", no_argument, 0, 0},
+        {"verbose", no_argument, 0, 'v'},
+        {"version", no_argument, 0, 0},
 #if !defined(_WIN32)
         {"wipe-and-use-fbe", no_argument, 0, 0},
 #endif
@@ -1538,100 +1371,84 @@
 
     serial = getenv("ANDROID_SERIAL");
 
-    while (1) {
-        int c = getopt_long(argc, argv, "wub:k:n:r:t:s:S:lc:i:m:ha::", longopts, &longindex);
-        if (c < 0) {
-            break;
-        }
-        /* Alphabetical cases */
-        switch (c) {
-        case 'a':
-            wants_set_active = true;
-            if (optarg)
-                next_active = optarg;
-            break;
-        case 'b':
-            base_addr = strtoul(optarg, 0, 16);
-            break;
-        case 'c':
-            cmdline = optarg;
-            break;
-        case 'h':
-            return show_help();
-        case 'i': {
-                char *endptr = nullptr;
-                unsigned long val;
-
-                val = strtoul(optarg, &endptr, 0);
-                if (!endptr || *endptr != '\0' || (val & ~0xffff))
-                    die("invalid vendor id '%s'", optarg);
-                vendor_id = (unsigned short)val;
-                break;
-            }
-        case 'k':
-            kernel_offset = strtoul(optarg, 0, 16);
-            break;
-        case 'l':
-            long_listing = 1;
-            break;
-        case 'n':
-            page_size = (unsigned)strtoul(optarg, nullptr, 0);
-            if (!page_size) die("invalid page size");
-            break;
-        case 'r':
-            ramdisk_offset = strtoul(optarg, 0, 16);
-            break;
-        case 't':
-            tags_offset = strtoul(optarg, 0, 16);
-            break;
-        case 's':
-            serial = optarg;
-            break;
-        case 'S':
-            sparse_limit = parse_num(optarg);
-            if (sparse_limit < 0) die("invalid sparse limit");
-            break;
-        case 'u':
-            erase_first = false;
-            break;
-        case 'w':
-            wants_wipe = true;
-            break;
-        case '?':
-            return 1;
-        case 0:
-            if (strcmp("unbuffered", longopts[longindex].name) == 0) {
+    int c;
+    while ((c = getopt_long(argc, argv, "a::hls:S:vw", longopts, &longindex)) != -1) {
+        if (c == 0) {
+            std::string name{longopts[longindex].name};
+            if (name == "base") {
+                g_base_addr = strtoul(optarg, 0, 16);
+            } else if (name == "cmdline") {
+                g_cmdline = optarg;
+            } else if (name == "disable-verification") {
+                g_disable_verification = true;
+            } else if (name == "disable-verity") {
+                g_disable_verity = true;
+            } else if (name == "header-version") {
+                g_boot_img_hdr.header_version = strtoul(optarg, nullptr, 0);
+            } else if (name == "kernel-offset") {
+                g_boot_img_hdr.kernel_addr = strtoul(optarg, 0, 16);
+            } else if (name == "os-patch-level") {
+                ParseOsPatchLevel(&g_boot_img_hdr, optarg);
+            } else if (name == "os-version") {
+                ParseOsVersion(&g_boot_img_hdr, optarg);
+            } else if (name == "page-size") {
+                g_boot_img_hdr.page_size = strtoul(optarg, nullptr, 0);
+                if (g_boot_img_hdr.page_size == 0) die("invalid page size");
+            } else if (name == "ramdisk-offset") {
+                g_boot_img_hdr.ramdisk_addr = strtoul(optarg, 0, 16);
+            } else if (name == "skip-reboot") {
+                skip_reboot = true;
+            } else if (name == "skip-secondary") {
+                skip_secondary = true;
+            } else if (name == "slot") {
+                slot_override = optarg;
+            } else if (name == "tags-offset") {
+                g_boot_img_hdr.tags_addr = strtoul(optarg, 0, 16);
+            } else if (name == "unbuffered") {
                 setvbuf(stdout, nullptr, _IONBF, 0);
                 setvbuf(stderr, nullptr, _IONBF, 0);
-            } else if (strcmp("version", longopts[longindex].name) == 0) {
+            } else if (name == "version") {
                 fprintf(stdout, "fastboot version %s\n", FASTBOOT_VERSION);
                 fprintf(stdout, "Installed as %s\n", android::base::GetExecutablePath().c_str());
                 return 0;
-            } else if (strcmp("slot", longopts[longindex].name) == 0) {
-                slot_override = std::string(optarg);
-            } else if (strcmp("skip-secondary", longopts[longindex].name) == 0 ) {
-                skip_secondary = true;
-            } else if (strcmp("skip-reboot", longopts[longindex].name) == 0 ) {
-                skip_reboot = true;
-            } else if (strcmp("disable-verity", longopts[longindex].name) == 0 ) {
-                g_disable_verity = true;
-            } else if (strcmp("disable-verification", longopts[longindex].name) == 0 ) {
-                g_disable_verification = true;
 #if !defined(_WIN32)
-            } else if (strcmp("wipe-and-use-fbe", longopts[longindex].name) == 0) {
+            } else if (name == "wipe-and-use-fbe") {
                 wants_wipe = true;
                 set_fbe_marker = true;
 #endif
-            } else if (strcmp("header-version", longopts[longindex].name) == 0) {
-                header_version = strtoul(optarg, nullptr, 0);
             } else {
-                fprintf(stderr, "Internal error in options processing for %s\n",
-                    longopts[longindex].name);
-                return 1;
+                die("unknown option %s", longopts[longindex].name);
             }
-            break;
-        default:
-            abort();
+        } else {
+            switch (c) {
+                case 'a':
+                    wants_set_active = true;
+                    if (optarg) next_active = optarg;
+                    break;
+                case 'h':
+                    return show_help();
+                case 'l':
+                    g_long_listing = true;
+                    break;
+                case 's':
+                    serial = optarg;
+                    break;
+                case 'S':
+                    if (!android::base::ParseByteCount(optarg, &sparse_limit)) {
+                        die("invalid sparse limit %s", optarg);
+                    }
+                    break;
+                case 'v':
+                    set_verbose();
+                    break;
+                case 'w':
+                    wants_wipe = true;
+                    break;
+                case '?':
+                    return 1;
+                default:
+                    abort();
+            }
         }
     }
 
@@ -1656,9 +1473,6 @@
 
     const double start = now();
 
-    if (!supports_AB(transport) && supports_AB_obsolete(transport)) {
-        fprintf(stderr, "Warning: Device A/B support is outdated. Bootloader update required.\n");
-    }
     if (slot_override != "") slot_override = verify_slot(transport, slot_override);
     if (next_active != "") next_active = verify_slot(transport, next_active, false);
 
@@ -1715,9 +1529,6 @@
             std::string partition = next_arg(&args);
 
             auto format = [&](const std::string& partition) {
-                if (erase_first && needs_erase(transport, partition.c_str())) {
-                    fb_queue_erase(partition);
-                }
                 fb_perform_format(transport, partition, 0, type_override, size_override, "");
             };
             do_for_partitions(transport, partition.c_str(), slot_override, format, true);
@@ -1736,9 +1547,6 @@
                 if (what == "bootloader") {
                     wants_reboot = false;
                     wants_reboot_bootloader = true;
-                } else if (what == "emergency") {
-                    wants_reboot = false;
-                    wants_reboot_emergency = true;
                 } else {
                     syntax_error("unknown reboot target %s", what.c_str());
                 }
@@ -1756,7 +1564,7 @@
             std::string second_stage;
             if (!args.empty()) second_stage = next_arg(&args);
 
-            data = load_bootable_image(kernel, ramdisk, second_stage, &sz, cmdline, header_version);
+            data = load_bootable_image(kernel, ramdisk, second_stage, &sz);
             fb_queue_download("boot.img", data, sz);
             fb_queue_command("boot", "booting");
         } else if (command == "flash") {
@@ -1771,9 +1579,6 @@
             if (fname.empty()) die("cannot determine image filename for '%s'", pname.c_str());
 
             auto flash = [&](const std::string &partition) {
-                if (erase_first && needs_erase(transport, partition.c_str())) {
-                    fb_queue_erase(partition);
-                }
                 do_flash(transport, partition.c_str(), fname.c_str());
             };
             do_for_partitions(transport, pname.c_str(), slot_override, flash, true);
@@ -1785,7 +1590,7 @@
             std::string second_stage;
             if (!args.empty()) second_stage = next_arg(&args);
 
-            data = load_bootable_image(kernel, ramdisk, second_stage, &sz, cmdline, header_version);
+            data = load_bootable_image(kernel, ramdisk, second_stage, &sz);
             auto flashraw = [&](const std::string& partition) {
                 fb_queue_flash(partition, data, sz);
             };
@@ -1793,9 +1598,9 @@
         } else if (command == "flashall") {
             if (slot_override == "all") {
                 fprintf(stderr, "Warning: slot set to 'all'. Secondary slots will not be flashed.\n");
-                do_flashall(transport, slot_override, erase_first, true);
+                do_flashall(transport, slot_override, true);
             } else {
-                do_flashall(transport, slot_override, erase_first, skip_secondary);
+                do_flashall(transport, slot_override, skip_secondary);
             }
             wants_reboot = true;
         } else if (command == "update") {
@@ -1807,20 +1612,10 @@
             if (!args.empty()) {
                 filename = next_arg(&args);
             }
-            do_update(transport, filename.c_str(), slot_override, erase_first,
-                      skip_secondary || slot_all);
+            do_update(transport, filename.c_str(), slot_override, skip_secondary || slot_all);
             wants_reboot = true;
         } else if (command == "set_active") {
             std::string slot = verify_slot(transport, next_arg(&args), false);
-
-            // Legacy support: verify_slot() removes leading underscores, we need to put them back
-            // in for old bootloaders. Legacy bootloaders do not have the slot-count variable but
-            // do have slot-suffixes.
-            std::string var;
-            if (!fb_getvar(transport, "slot-count", &var) &&
-                    fb_getvar(transport, "slot-suffixes", &var)) {
-                slot = "_" + slot;
-            }
             fb_set_active(slot);
         } else if (command == "stage") {
             std::string filename = next_arg(&args);
@@ -1841,12 +1636,8 @@
             } else if (args.size() == 1 && (args[0] == "unlock" || args[0] == "lock" ||
                                             args[0] == "unlock_critical" ||
                                             args[0] == "lock_critical" ||
-                                            args[0] == "get_unlock_ability" ||
-                                            args[0] == "get_unlock_bootloader_nonce" ||
-                                            args[0] == "lock_bootloader")) {
+                                            args[0] == "get_unlock_ability")) {
                 do_oem_command("flashing", &args);
-            } else if (args.size() == 2 && args[0] == "unlock_bootloader") {
-                do_bypass_unlock_command(&args);
             } else {
                 syntax_error("unknown 'flashing' command %s", args[0].c_str());
             }
@@ -1881,12 +1672,32 @@
     } else if (wants_reboot_bootloader) {
         fb_queue_command("reboot-bootloader", "rebooting into bootloader");
         fb_queue_wait_for_disconnect();
-    } else if (wants_reboot_emergency) {
-        fb_queue_command("reboot-emergency", "rebooting into emergency download (EDL) mode");
-        fb_queue_wait_for_disconnect();
     }
 
     int status = fb_execute_queue(transport) ? EXIT_FAILURE : EXIT_SUCCESS;
     fprintf(stderr, "Finished. Total time: %.3fs\n", (now() - start));
     return status;
 }
+
+void FastBoot::ParseOsPatchLevel(boot_img_hdr_v1* hdr, const char* arg) {
+    unsigned year, month, day;
+    if (sscanf(arg, "%u-%u-%u", &year, &month, &day) != 3) {
+        syntax_error("OS patch level should be YYYY-MM-DD: %s", arg);
+    }
+    if (year < 2000 || year >= 2128) syntax_error("year out of range: %d", year);
+    if (month < 1 || month > 12) syntax_error("month out of range: %d", month);
+    hdr->SetOsPatchLevel(year, month);
+}
+
+void FastBoot::ParseOsVersion(boot_img_hdr_v1* hdr, const char* arg) {
+    unsigned major = 0, minor = 0, patch = 0;
+    std::vector<std::string> versions = android::base::Split(arg, ".");
+    if (versions.size() < 1 || versions.size() > 3 ||
+        (versions.size() >= 1 && !android::base::ParseUint(versions[0], &major)) ||
+        (versions.size() >= 2 && !android::base::ParseUint(versions[1], &minor)) ||
+        (versions.size() == 3 && !android::base::ParseUint(versions[2], &patch)) ||
+        (major > 0x7f || minor > 0x7f || patch > 0x7f)) {
+        syntax_error("bad OS version: %s", arg);
+    }
+    hdr->SetOsVersion(major, minor, patch);
+}
diff --git a/fastboot/fastboot.h b/fastboot/fastboot.h
index a31057a..2935eb5 100644
--- a/fastboot/fastboot.h
+++ b/fastboot/fastboot.h
@@ -26,16 +26,16 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _FASTBOOT_H_
-#define _FASTBOOT_H_
+#pragma once
 
 #include <inttypes.h>
 #include <stdlib.h>
 
 #include <string>
 
-#include "transport.h"
+#include <bootimg.h>
 
+class Transport;
 struct sparse_file;
 
 /* protocol.c - fastboot protocol */
@@ -75,6 +75,7 @@
 /* util stuff */
 double now();
 char* xstrdup(const char*);
+void set_verbose();
 
 // These printf-like functions are implemented in terms of vsnprintf, so they
 // use the same attribute for compile-time format string checking. On Windows,
@@ -90,9 +91,16 @@
 #endif
 void die(const char* fmt, ...) __attribute__((__noreturn__))
 __attribute__((__format__(FASTBOOT_FORMAT_ARCHETYPE, 1, 2)));
+void verbose(const char* fmt, ...) __attribute__((__format__(FASTBOOT_FORMAT_ARCHETYPE, 1, 2)));
 #undef FASTBOOT_FORMAT_ARCHETYPE
 
 /* Current product */
 extern char cur_product[FB_RESPONSE_SZ + 1];
 
-#endif
+class FastBoot {
+  public:
+    int Main(int argc, char* argv[]);
+
+    void ParseOsPatchLevel(boot_img_hdr_v1*, const char*);
+    void ParseOsVersion(boot_img_hdr_v1*, const char*);
+};
diff --git a/fastboot/fastboot_test.cpp b/fastboot/fastboot_test.cpp
new file mode 100644
index 0000000..1681427
--- /dev/null
+++ b/fastboot/fastboot_test.cpp
@@ -0,0 +1,61 @@
+/*
+ * 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 "fastboot.h"
+
+#include <gtest/gtest.h>
+
+TEST(FastBoot, ParseOsPatchLevel) {
+    FastBoot fb;
+    boot_img_hdr_v1 hdr;
+
+    hdr = {};
+    fb.ParseOsPatchLevel(&hdr, "2018-01-05");
+    ASSERT_EQ(2018U, 2000U + ((hdr.os_version >> 4) & 0x7f));
+    ASSERT_EQ(1U, ((hdr.os_version >> 0) & 0xf));
+
+    EXPECT_DEATH(fb.ParseOsPatchLevel(&hdr, "2018"), "should be YYYY-MM-DD");
+    EXPECT_DEATH(fb.ParseOsPatchLevel(&hdr, "2018-01"), "should be YYYY-MM-DD");
+    EXPECT_DEATH(fb.ParseOsPatchLevel(&hdr, "2128-01-05"), "year out of range");
+    EXPECT_DEATH(fb.ParseOsPatchLevel(&hdr, "2018-13-05"), "month out of range");
+}
+
+TEST(FastBoot, ParseOsVersion) {
+    FastBoot fb;
+    boot_img_hdr_v1 hdr;
+
+    hdr = {};
+    fb.ParseOsVersion(&hdr, "1.2.3");
+    ASSERT_EQ(1U, ((hdr.os_version >> 25) & 0x7f));
+    ASSERT_EQ(2U, ((hdr.os_version >> 18) & 0x7f));
+    ASSERT_EQ(3U, ((hdr.os_version >> 11) & 0x7f));
+
+    fb.ParseOsVersion(&hdr, "1.2");
+    ASSERT_EQ(1U, ((hdr.os_version >> 25) & 0x7f));
+    ASSERT_EQ(2U, ((hdr.os_version >> 18) & 0x7f));
+    ASSERT_EQ(0U, ((hdr.os_version >> 11) & 0x7f));
+
+    fb.ParseOsVersion(&hdr, "1");
+    ASSERT_EQ(1U, ((hdr.os_version >> 25) & 0x7f));
+    ASSERT_EQ(0U, ((hdr.os_version >> 18) & 0x7f));
+    ASSERT_EQ(0U, ((hdr.os_version >> 11) & 0x7f));
+
+    EXPECT_DEATH(fb.ParseOsVersion(&hdr, ""), "bad OS version");
+    EXPECT_DEATH(fb.ParseOsVersion(&hdr, "1.2.3.4"), "bad OS version");
+    EXPECT_DEATH(fb.ParseOsVersion(&hdr, "128.2.3"), "bad OS version");
+    EXPECT_DEATH(fb.ParseOsVersion(&hdr, "1.128.3"), "bad OS version");
+    EXPECT_DEATH(fb.ParseOsVersion(&hdr, "1.2.128"), "bad OS version");
+}
diff --git a/fastboot/fs.cpp b/fastboot/fs.cpp
index c30ca1e..6f51cf6 100644
--- a/fastboot/fs.cpp
+++ b/fastboot/fs.cpp
@@ -20,6 +20,7 @@
 
 #include <android-base/errors.h>
 #include <android-base/file.h>
+#include <android-base/macros.h>
 #include <android-base/stringprintf.h>
 #include <android-base/unique_fd.h>
 
diff --git a/fastboot/fs.h b/fastboot/fs.h
index c6baa7f..331100d 100644
--- a/fastboot/fs.h
+++ b/fastboot/fs.h
@@ -1,5 +1,4 @@
-#ifndef _FS_H_
-#define _FS_H_
+#pragma once
 
 #include <string>
 #include <stdint.h>
@@ -9,5 +8,3 @@
 const struct fs_generator* fs_get_generator(const std::string& fs_type);
 int fs_generator_generate(const struct fs_generator* gen, const char* fileName, long long partSize,
     const std::string& initial_dir, unsigned eraseBlkSize = 0, unsigned logicalBlkSize = 0);
-
-#endif
diff --git a/fastboot/main.cpp b/fastboot/main.cpp
new file mode 100644
index 0000000..f1c8afb
--- /dev/null
+++ b/fastboot/main.cpp
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "fastboot.h"
+
+int main(int argc, char* argv[]) {
+    FastBoot fb;
+    return fb.Main(argc, argv);
+}
diff --git a/fastboot/protocol.cpp b/fastboot/protocol.cpp
index c239861..fda6f5d 100644
--- a/fastboot/protocol.cpp
+++ b/fastboot/protocol.cpp
@@ -57,10 +57,10 @@
 }
 
 static int64_t check_response(Transport* transport, uint32_t size, char* response) {
-    char status[65];
+    char status[FB_RESPONSE_SZ + 1];
 
     while (true) {
-        int r = transport->Read(status, 64);
+        int r = transport->Read(status, FB_RESPONSE_SZ);
         if (r < 0) {
             g_error = android::base::StringPrintf("status read failed (%s)", strerror(errno));
             transport->Close();
@@ -75,18 +75,21 @@
         }
 
         if (!memcmp(status, "INFO", 4)) {
-            fprintf(stderr,"(bootloader) %s\n", status + 4);
+            verbose("received INFO \"%s\"", status + 4);
+            fprintf(stderr, "(bootloader) %s\n", status + 4);
             continue;
         }
 
         if (!memcmp(status, "OKAY", 4)) {
+            verbose("received OKAY \"%s\"", status + 4);
             if (response) {
-                strcpy(response, (char*) status + 4);
+                strcpy(response, status + 4);
             }
             return 0;
         }
 
         if (!memcmp(status, "FAIL", 4)) {
+            verbose("received FAIL \"%s\"", status + 4);
             if (r > 4) {
                 g_error = android::base::StringPrintf("remote: %s", status + 4);
             } else {
@@ -96,6 +99,7 @@
         }
 
         if (!memcmp(status, "DATA", 4) && size > 0){
+            verbose("received DATA %s", status + 4);
             uint32_t dsize = strtol(status + 4, 0, 16);
             if (dsize > size) {
                 g_error = android::base::StringPrintf("data size too large (%d)", dsize);
@@ -105,6 +109,7 @@
             return dsize;
         }
 
+        verbose("received unknown status code \"%4.4s\"", status);
         g_error = "unknown status code";
         transport->Close();
         break;
@@ -115,7 +120,7 @@
 
 static int64_t _command_start(Transport* transport, const std::string& cmd, uint32_t size,
                               char* response) {
-    if (cmd.size() > 64) {
+    if (cmd.size() > FB_COMMAND_SZ) {
         g_error = android::base::StringPrintf("command too large (%zu)", cmd.size());
         return -1;
     }
@@ -124,6 +129,8 @@
         response[0] = 0;
     }
 
+    verbose("sending command \"%s\"", cmd.c_str());
+
     if (transport->Write(cmd.c_str(), cmd.size()) != static_cast<int>(cmd.size())) {
         g_error = android::base::StringPrintf("command write failed (%s)", strerror(errno));
         transport->Close();
@@ -134,6 +141,8 @@
 }
 
 static int64_t _command_write_data(Transport* transport, const void* data, uint32_t size) {
+    verbose("sending data (%" PRIu32 " bytes)", size);
+
     int64_t r = transport->Write(data, size);
     if (r < 0) {
         g_error = android::base::StringPrintf("data write failure (%s)", strerror(errno));
@@ -149,6 +158,8 @@
 }
 
 static int64_t _command_read_data(Transport* transport, void* data, uint32_t size) {
+    verbose("reading data (%" PRIu32 " bytes)", size);
+
     int64_t r = transport->Read(data, size);
     if (r < 0) {
         g_error = android::base::StringPrintf("data read failure (%s)", strerror(errno));
@@ -267,19 +278,14 @@
     return _command_end(transport);
 }
 
-#define TRANSPORT_BUF_SIZE 1024
+static constexpr size_t TRANSPORT_BUF_SIZE = 1024;
 static char transport_buf[TRANSPORT_BUF_SIZE];
-static int transport_buf_len;
+static size_t transport_buf_len;
 
-static int fb_download_data_sparse_write(void *priv, const void *data, int len)
-{
-    int r;
-    Transport* transport = reinterpret_cast<Transport*>(priv);
-    int to_write;
-    const char* ptr = reinterpret_cast<const char*>(data);
-
+static int fb_download_data_sparse_write(void* priv, const void* data, size_t len) {
+    const char* ptr = static_cast<const char*>(data);
     if (transport_buf_len) {
-        to_write = std::min(TRANSPORT_BUF_SIZE - transport_buf_len, len);
+        size_t to_write = std::min(TRANSPORT_BUF_SIZE - transport_buf_len, len);
 
         memcpy(transport_buf + transport_buf_len, ptr, to_write);
         transport_buf_len += to_write;
@@ -287,9 +293,10 @@
         len -= to_write;
     }
 
+    Transport* transport = static_cast<Transport*>(priv);
     if (transport_buf_len == TRANSPORT_BUF_SIZE) {
-        r = _command_write_data(transport, transport_buf, TRANSPORT_BUF_SIZE);
-        if (r != TRANSPORT_BUF_SIZE) {
+        int64_t r = _command_write_data(transport, transport_buf, TRANSPORT_BUF_SIZE);
+        if (r != static_cast<int64_t>(TRANSPORT_BUF_SIZE)) {
             return -1;
         }
         transport_buf_len = 0;
@@ -300,9 +307,9 @@
             g_error = "internal error: transport_buf not empty";
             return -1;
         }
-        to_write = round_down(len, TRANSPORT_BUF_SIZE);
-        r = _command_write_data(transport, ptr, to_write);
-        if (r != to_write) {
+        size_t to_write = round_down(len, TRANSPORT_BUF_SIZE);
+        int64_t r = _command_write_data(transport, ptr, to_write);
+        if (r != static_cast<int64_t>(to_write)) {
             return -1;
         }
         ptr += to_write;
@@ -333,12 +340,12 @@
 }
 
 int fb_download_data_sparse(Transport* transport, struct sparse_file* s) {
-    int size = sparse_file_len(s, true, false);
-    if (size <= 0) {
+    int64_t size = sparse_file_len(s, true, false);
+    if (size <= 0 || size > std::numeric_limits<uint32_t>::max()) {
         return -1;
     }
 
-    std::string cmd(android::base::StringPrintf("download:%08x", size));
+    std::string cmd(android::base::StringPrintf("download:%08" PRIx64, size));
     int r = _command_start(transport, cmd, size, 0);
     if (r < 0) {
         return -1;
diff --git a/fastboot/socket.h b/fastboot/socket.h
index 7eaa0ab..e791f2c 100644
--- a/fastboot/socket.h
+++ b/fastboot/socket.h
@@ -30,8 +30,7 @@
 // engine should not be using this interface directly, but instead should use a higher-level
 // interface that enforces the fastboot protocol.
 
-#ifndef SOCKET_H_
-#define SOCKET_H_
+#pragma once
 
 #include <functional>
 #include <memory>
@@ -125,5 +124,3 @@
 
     DISALLOW_COPY_AND_ASSIGN(Socket);
 };
-
-#endif  // SOCKET_H_
diff --git a/fastboot/socket_mock.h b/fastboot/socket_mock.h
index eacd6bb..6e95b16 100644
--- a/fastboot/socket_mock.h
+++ b/fastboot/socket_mock.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef SOCKET_MOCK_H_
-#define SOCKET_MOCK_H_
+#pragma once
 
 #include <memory>
 #include <queue>
@@ -97,5 +96,3 @@
 
     DISALLOW_COPY_AND_ASSIGN(SocketMock);
 };
-
-#endif  // SOCKET_MOCK_H_
diff --git a/fastboot/tcp.h b/fastboot/tcp.h
index aa3ef13..8b638a4 100644
--- a/fastboot/tcp.h
+++ b/fastboot/tcp.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef TCP_H_
-#define TCP_H_
+#pragma once
 
 #include <memory>
 #include <string>
@@ -55,5 +54,3 @@
 }  // namespace internal
 
 }  // namespace tcp
-
-#endif  // TCP_H_
diff --git a/fastboot/transport.h b/fastboot/transport.h
index 67d01f9..96b90d2 100644
--- a/fastboot/transport.h
+++ b/fastboot/transport.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef TRANSPORT_H_
-#define TRANSPORT_H_
+#pragma once
 
 #include <android-base/macros.h>
 
@@ -44,5 +43,3 @@
   private:
     DISALLOW_COPY_AND_ASSIGN(Transport);
 };
-
-#endif  // TRANSPORT_H_
diff --git a/fastboot/udp.h b/fastboot/udp.h
index 14f5b35..8d37b84 100644
--- a/fastboot/udp.h
+++ b/fastboot/udp.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef UDP_H_
-#define UDP_H_
+#pragma once
 
 #include <memory>
 #include <string>
@@ -77,5 +76,3 @@
 }  // namespace internal
 
 }  // namespace udp
-
-#endif  // UDP_H_
diff --git a/fastboot/usb.h b/fastboot/usb.h
index 4acf12d..5b44468 100644
--- a/fastboot/usb.h
+++ b/fastboot/usb.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _USB_H_
-#define _USB_H_
+#pragma once
 
 #include "transport.h"
 
@@ -56,5 +55,3 @@
 typedef int (*ifc_match_func)(usb_ifc_info *ifc);
 
 Transport* usb_open(ifc_match_func callback);
-
-#endif
diff --git a/fastboot/usbtest.cpp b/fastboot/usbtest.cpp
deleted file mode 100644
index 9423c6d..0000000
--- a/fastboot/usbtest.cpp
+++ /dev/null
@@ -1,212 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-
-#include <sys/time.h>
-
-#include "usb.h"
-
-static unsigned arg_size = 4096;
-static unsigned arg_count = 4096;
-
-long long NOW(void)
-{
-    struct timeval tv;
-    gettimeofday(&tv, 0);
-
-    return (((long long) tv.tv_sec) * ((long long) 1000000)) +
-        (((long long) tv.tv_usec));
-}
-
-int printifc(usb_ifc_info *info)
-{
-    printf("dev: csp=%02x/%02x/%02x v=%04x p=%04x  ",
-           info->dev_class, info->dev_subclass, info->dev_protocol,
-           info->dev_vendor, info->dev_product);
-    printf("ifc: csp=%02x/%02x/%02x%s%s\n",
-           info->ifc_class, info->ifc_subclass, info->ifc_protocol,
-           info->has_bulk_in ? " in" : "",
-           info->has_bulk_out ? " out" : "");
-    return -1;
-}
-
-int match_null(usb_ifc_info *info)
-{
-    if(info->dev_vendor != 0x18d1) return -1;
-    if(info->ifc_class != 0xff) return -1;
-    if(info->ifc_subclass != 0xfe) return -1;
-    if(info->ifc_protocol != 0x01) return -1;
-    return 0;
-}
-
-int match_zero(usb_ifc_info *info)
-{
-    if(info->dev_vendor != 0x18d1) return -1;
-    if(info->ifc_class != 0xff) return -1;
-    if(info->ifc_subclass != 0xfe) return -1;
-    if(info->ifc_protocol != 0x02) return -1;
-    return 0;
-}
-
-int match_loop(usb_ifc_info *info)
-{
-    if(info->dev_vendor != 0x18d1) return -1;
-    if(info->ifc_class != 0xff) return -1;
-    if(info->ifc_subclass != 0xfe) return -1;
-    if(info->ifc_protocol != 0x03) return -1;
-    return 0;
-}
-
-int test_null(Transport* usb)
-{
-    unsigned i;
-    unsigned char buf[4096];
-    memset(buf, 0xee, 4096);
-    long long t0, t1;
-
-    t0 = NOW();
-    for (i = 0; i < arg_count; i++) {
-        if (usb->Write(buf, arg_size) != static_cast<int>(arg_size)) {
-            fprintf(stderr,"write failed (%s)\n", strerror(errno));
-            return -1;
-        }
-    }
-    t1 = NOW();
-    fprintf(stderr,"%d bytes in %lld uS\n", arg_count * arg_size, (t1 - t0));
-    return 0;
-}
-
-int test_zero(Transport* usb)
-{
-    unsigned i;
-    unsigned char buf[4096];
-    long long t0, t1;
-
-    t0 = NOW();
-    for (i = 0; i < arg_count; i++) {
-        if (usb->Read(buf, arg_size) != static_cast<int>(arg_size)) {
-            fprintf(stderr,"read failed (%s)\n", strerror(errno));
-            return -1;
-        }
-    }
-    t1 = NOW();
-    fprintf(stderr,"%d bytes in %lld uS\n", arg_count * arg_size, (t1 - t0));
-    return 0;
-}
-
-struct
-{
-    const char *cmd;
-    ifc_match_func match;
-    int (*test)(Transport* usb);
-    const char *help;
-} tests[] = {
-    { "list", printifc,   NULL,      "list interfaces" },
-    { "send", match_null, test_null, "send to null interface" },
-    { "recv", match_zero, test_zero, "recv from zero interface" },
-    { "loop", match_loop, NULL,      "exercise loopback interface" },
-    { NULL, NULL, NULL, NULL },
-};
-
-int usage(void)
-{
-    int i;
-
-    fprintf(stderr,"usage: usbtest <testname>\n\navailable tests:\n");
-    for(i = 0; tests[i].cmd; i++) {
-        fprintf(stderr," %-8s %s\n", tests[i].cmd, tests[i].help);
-    }
-    return -1;
-}
-
-int process_args(int argc, char **argv)
-{
-    while(argc-- > 0) {
-        char *arg = *argv++;
-        if(!strncmp(arg,"count=",6)) {
-            arg_count = atoi(arg + 6);
-        } else if(!strncmp(arg,"size=",5)) {
-            arg_size = atoi(arg + 5);
-        } else {
-            fprintf(stderr,"unknown argument: %s\n", arg);
-            return -1;
-        }
-    }
-
-    if(arg_count == 0) {
-        fprintf(stderr,"count may not be zero\n");
-        return -1;
-    }
-
-    if(arg_size > 4096) {
-        fprintf(stderr,"size may not be greater than 4096\n");
-        return -1;
-    }
-
-    return 0;
-}
-
-int main(int argc, char **argv)
-{
-    Transport* usb;
-    int i;
-
-    if(argc < 2)
-        return usage();
-
-    if(argc > 2) {
-        if(process_args(argc - 2, argv + 2))
-            return -1;
-    }
-
-    for(i = 0; tests[i].cmd; i++) {
-        if(!strcmp(argv[1], tests[i].cmd)) {
-            usb = usb_open(tests[i].match);
-            if(tests[i].test) {
-                if(usb == 0) {
-                    fprintf(stderr,"usbtest: %s: could not find interface\n",
-                            tests[i].cmd);
-                    return -1;
-                }
-                if(tests[i].test(usb)) {
-                    fprintf(stderr,"usbtest: %s: FAIL\n", tests[i].cmd);
-                    return -1;
-                } else {
-                    fprintf(stderr,"usbtest: %s: OKAY\n", tests[i].cmd);
-                }
-            }
-            return 0;
-        }
-    }
-
-    return usage();
-}
diff --git a/fastboot/util.cpp b/fastboot/util.cpp
index fb085e7..140270f 100644
--- a/fastboot/util.cpp
+++ b/fastboot/util.cpp
@@ -35,6 +35,8 @@
 
 #include "fastboot.h"
 
+static bool g_verbose = false;
+
 double now() {
     struct timeval tv;
     gettimeofday(&tv, NULL);
@@ -44,13 +46,30 @@
 void die(const char* fmt, ...) {
     va_list ap;
     va_start(ap, fmt);
-    fprintf(stderr,"error: ");
+    fprintf(stderr, "fastboot: error: ");
     vfprintf(stderr, fmt, ap);
-    fprintf(stderr,"\n");
+    fprintf(stderr, "\n");
     va_end(ap);
     exit(EXIT_FAILURE);
 }
 
+void set_verbose() {
+    g_verbose = true;
+}
+
+void verbose(const char* fmt, ...) {
+    if (!g_verbose) return;
+
+    if (*fmt != '\n') {
+        va_list ap;
+        va_start(ap, fmt);
+        fprintf(stderr, "fastboot: verbose: ");
+        vfprintf(stderr, fmt, ap);
+        va_end(ap);
+    }
+    fprintf(stderr, "\n");
+}
+
 char* xstrdup(const char* s) {
     char* result = strdup(s);
     if (!result) die("out of memory");
diff --git a/fs_mgr/Android.bp b/fs_mgr/Android.bp
index f23150d..b0b4839 100644
--- a/fs_mgr/Android.bp
+++ b/fs_mgr/Android.bp
@@ -33,6 +33,7 @@
 cc_library_static {
     name: "libfs_mgr",
     defaults: ["fs_mgr_defaults"],
+    recovery_available: true,
     export_include_dirs: ["include"],
     include_dirs: ["system/vold"],
     srcs: [
@@ -42,6 +43,7 @@
         "fs_mgr_verity.cpp",
         "fs_mgr_avb.cpp",
         "fs_mgr_avb_ops.cpp",
+        "fs_mgr_dm_linear.cpp",
     ],
     static_libs: [
         "libfec",
@@ -54,12 +56,18 @@
         "libselinux",
         "libavb",
         "libfstab",
+        "libdm",
+        "liblp",
     ],
     export_static_lib_headers: [
         "libfstab",
+        "libdm",
+        "liblp",
     ],
     whole_static_libs: [
+        "liblp",
         "liblogwrap",
+        "libdm",
         "libfstab",
     ],
     cppflags: [
@@ -78,6 +86,7 @@
 cc_library_static {
     name: "libfstab",
     vendor_available: true,
+    recovery_available: true,
     defaults: ["fs_mgr_defaults"],
     srcs: [
         "fs_mgr_fstab.cpp",
diff --git a/fs_mgr/fs_mgr.cpp b/fs_mgr/fs_mgr.cpp
index 9aab0ba..9856126 100644
--- a/fs_mgr/fs_mgr.cpp
+++ b/fs_mgr/fs_mgr.cpp
@@ -794,6 +794,29 @@
     return true;
 }
 
+bool fs_mgr_update_logical_partition(struct fstab_rec* rec) {
+    // Logical partitions are specified with a named partition rather than a
+    // block device, so if the block device is a path, then it has already
+    // been updated.
+    if (rec->blk_device[0] == '/') {
+        return true;
+    }
+
+    android::base::unique_fd dm_fd(open("/dev/device-mapper", O_RDONLY));
+    if (dm_fd < 0) {
+        PLOG(ERROR) << "open /dev/device-mapper failed";
+        return false;
+    }
+    struct dm_ioctl io;
+    std::string device_name;
+    if (!fs_mgr_dm_get_device_name(&io, rec->blk_device, dm_fd, &device_name)) {
+        return false;
+    }
+    free(rec->blk_device);
+    rec->blk_device = strdup(device_name.c_str());
+    return true;
+}
+
 /* When multiple fstab records share the same mount_point, it will
  * try to mount each one in turn, and ignore any duplicates after a
  * first successful mount.
@@ -845,6 +868,13 @@
             }
         }
 
+        if ((fstab->recs[i].fs_mgr_flags & MF_LOGICAL)) {
+            if (!fs_mgr_update_logical_partition(&fstab->recs[i])) {
+                LERROR << "Could not set up logical partition, skipping!";
+                continue;
+            }
+        }
+
         if (fstab->recs[i].fs_mgr_flags & MF_WAIT &&
             !fs_mgr_wait_for_file(fstab->recs[i].blk_device, 20s)) {
             LERROR << "Skipping '" << fstab->recs[i].blk_device << "' during mount_all";
@@ -1065,6 +1095,13 @@
             return FS_MGR_DOMNT_FAILED;
         }
 
+        if ((fstab->recs[i].fs_mgr_flags & MF_LOGICAL)) {
+            if (!fs_mgr_update_logical_partition(&fstab->recs[i])) {
+                LERROR << "Could not set up logical partition, skipping!";
+                continue;
+            }
+        }
+
         /* First check the filesystem if requested */
         if (fstab->recs[i].fs_mgr_flags & MF_WAIT && !fs_mgr_wait_for_file(n_blk_device, 20s)) {
             LERROR << "Skipping mounting '" << n_blk_device << "'";
@@ -1153,27 +1190,6 @@
     return 0;
 }
 
-int fs_mgr_unmount_all(struct fstab *fstab)
-{
-    int i = 0;
-    int ret = 0;
-
-    if (!fstab) {
-        return -1;
-    }
-
-    while (fstab->recs[i].blk_device) {
-        if (umount(fstab->recs[i].mount_point)) {
-            LERROR << "Cannot unmount filesystem at "
-                   << fstab->recs[i].mount_point;
-            ret = -1;
-        }
-        i++;
-    }
-
-    return ret;
-}
-
 /* This must be called after mount_all, because the mkswap command needs to be
  * available.
  */
@@ -1383,7 +1399,7 @@
             mount_point = basename(fstab->recs[i].mount_point);
         }
 
-        fs_mgr_verity_ioctl_init(io, mount_point, 0);
+        fs_mgr_dm_ioctl_init(io, DM_BUF_SIZE, mount_point);
 
         const char* status;
         if (ioctl(fd, DM_TABLE_STATUS, io)) {
diff --git a/fs_mgr/fs_mgr_avb.cpp b/fs_mgr/fs_mgr_avb.cpp
index 7824cfa..2020fa6 100644
--- a/fs_mgr/fs_mgr_avb.cpp
+++ b/fs_mgr/fs_mgr_avb.cpp
@@ -139,38 +139,23 @@
 };
 
 std::unique_ptr<FsManagerAvbVerifier> FsManagerAvbVerifier::Create() {
-    std::string cmdline;
-    if (!android::base::ReadFileToString("/proc/cmdline", &cmdline)) {
-        PERROR << "Failed to read /proc/cmdline";
-        return nullptr;
-    }
-
     std::unique_ptr<FsManagerAvbVerifier> avb_verifier(new FsManagerAvbVerifier());
     if (!avb_verifier) {
         LERROR << "Failed to create unique_ptr<FsManagerAvbVerifier>";
         return nullptr;
     }
 
-    std::string digest;
-    std::string hash_alg;
-    for (const auto& entry : android::base::Split(android::base::Trim(cmdline), " ")) {
-        std::vector<std::string> pieces = android::base::Split(entry, "=");
-        const std::string& key = pieces[0];
-        const std::string& value = pieces[1];
-
-        if (key == "androidboot.vbmeta.hash_alg") {
-            hash_alg = value;
-        } else if (key == "androidboot.vbmeta.size") {
-            if (!android::base::ParseUint(value.c_str(), &avb_verifier->vbmeta_size_)) {
-                return nullptr;
-            }
-        } else if (key == "androidboot.vbmeta.digest") {
-            digest = value;
-        }
+    std::string value;
+    if (!fs_mgr_get_boot_config("vbmeta.size", &value) ||
+        !android::base::ParseUint(value.c_str(), &avb_verifier->vbmeta_size_)) {
+        LERROR << "Invalid hash size: " << value.c_str();
+        return nullptr;
     }
 
     // Reads hash algorithm.
     size_t expected_digest_size = 0;
+    std::string hash_alg;
+    fs_mgr_get_boot_config("vbmeta.hash_alg", &hash_alg);
     if (hash_alg == "sha256") {
         expected_digest_size = SHA256_DIGEST_LENGTH * 2;
         avb_verifier->hash_alg_ = kSHA256;
@@ -183,6 +168,8 @@
     }
 
     // Reads digest.
+    std::string digest;
+    fs_mgr_get_boot_config("vbmeta.digest", &digest);
     if (digest.size() != expected_digest_size) {
         LERROR << "Unexpected digest size: " << digest.size()
                << " (expected: " << expected_digest_size << ")";
@@ -303,13 +290,14 @@
 
 static bool load_verity_table(struct dm_ioctl* io, const std::string& dm_device_name, int fd,
                               uint64_t image_size, const std::string& verity_table) {
-    fs_mgr_verity_ioctl_init(io, dm_device_name, DM_STATUS_TABLE_FLAG);
+    fs_mgr_dm_ioctl_init(io, DM_BUF_SIZE, dm_device_name);
 
     // The buffer consists of [dm_ioctl][dm_target_spec][verity_params].
     char* buffer = (char*)io;
 
     // Builds the dm_target_spec arguments.
     struct dm_target_spec* dm_target = (struct dm_target_spec*)&buffer[sizeof(struct dm_ioctl)];
+    io->flags = DM_READONLY_FLAG;
     io->target_count = 1;
     dm_target->status = 0;
     dm_target->sector_start = 0;
@@ -359,14 +347,14 @@
     alignas(dm_ioctl) char buffer[DM_BUF_SIZE];
     struct dm_ioctl* io = (struct dm_ioctl*)buffer;
     const std::string mount_point(basename(fstab_entry->mount_point));
-    if (!fs_mgr_create_verity_device(io, mount_point, fd)) {
+    if (!fs_mgr_dm_create_device(io, mount_point, fd)) {
         LERROR << "Couldn't create verity device!";
         return false;
     }
 
     // Gets the name of the device file.
     std::string verity_blk_name;
-    if (!fs_mgr_get_verity_device_name(io, mount_point, fd, &verity_blk_name)) {
+    if (!fs_mgr_dm_get_device_name(io, mount_point, fd, &verity_blk_name)) {
         LERROR << "Couldn't get verity device number!";
         return false;
     }
@@ -385,7 +373,7 @@
     }
 
     // Activates the device.
-    if (!fs_mgr_resume_verity_table(io, mount_point, fd)) {
+    if (!fs_mgr_dm_resume_table(io, mount_point, fd)) {
         return false;
     }
 
@@ -584,7 +572,13 @@
 
     // Derives partition_name from blk_device to query the corresponding AVB HASHTREE descriptor
     // to setup dm-verity. The partition_names in AVB descriptors are without A/B suffix.
-    std::string partition_name(basename(fstab_entry->blk_device));
+    std::string partition_name;
+    if (fstab_entry->fs_mgr_flags & MF_LOGICAL) {
+        partition_name = fstab_entry->logical_partition_name;
+    } else {
+        partition_name = basename(fstab_entry->blk_device);
+    }
+
     if (fstab_entry->fs_mgr_flags & MF_SLOTSELECT) {
         auto ab_suffix = partition_name.rfind(fs_mgr_get_slot_suffix());
         if (ab_suffix != std::string::npos) {
diff --git a/fs_mgr/fs_mgr_boot_config.cpp b/fs_mgr/fs_mgr_boot_config.cpp
index 9c5d3f3..733ad55 100644
--- a/fs_mgr/fs_mgr_boot_config.cpp
+++ b/fs_mgr/fs_mgr_boot_config.cpp
@@ -14,7 +14,10 @@
  * limitations under the License.
  */
 
+#include <algorithm>
+#include <iterator>
 #include <string>
+#include <vector>
 
 #include <android-base/file.h>
 #include <android-base/stringprintf.h>
@@ -23,46 +26,71 @@
 
 #include "fs_mgr_priv.h"
 
-// Tries to get the given boot config value from kernel cmdline.
-// Returns true if successfully found, false otherwise.
-bool fs_mgr_get_boot_config_from_kernel_cmdline(const std::string& key, std::string* out_val) {
+std::vector<std::pair<std::string, std::string>> fs_mgr_parse_boot_config(const std::string& cmdline) {
+    static constexpr char quote = '"';
+
+    std::vector<std::pair<std::string, std::string>> result;
+    size_t base = 0;
+    while (true) {
+        // skip quoted spans
+        auto found = base;
+        while (((found = cmdline.find_first_of(" \"", found)) != cmdline.npos) &&
+               (cmdline[found] == quote)) {
+            // unbalanced quote is ok
+            if ((found = cmdline.find(quote, found + 1)) == cmdline.npos) break;
+            ++found;
+        }
+        std::string piece;
+        auto source = cmdline.substr(base, found - base);
+        std::remove_copy(source.begin(), source.end(),
+                         std::back_insert_iterator<std::string>(piece), quote);
+        auto equal_sign = piece.find('=');
+        if (equal_sign == piece.npos) {
+            if (!piece.empty()) {
+                // no difference between <key> and <key>=
+                result.emplace_back(std::move(piece), "");
+            }
+        } else {
+            result.emplace_back(piece.substr(0, equal_sign), piece.substr(equal_sign + 1));
+        }
+        if (found == cmdline.npos) break;
+        base = found + 1;
+    }
+
+    return result;
+}
+
+bool fs_mgr_get_boot_config_from_kernel(const std::string& cmdline, const std::string& android_key,
+                                        std::string* out_val) {
     FS_MGR_CHECK(out_val != nullptr);
 
-    std::string cmdline;
-    std::string cmdline_key("androidboot." + key);
-    if (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) {
-                if (pieces[0] == cmdline_key) {
-                    *out_val = pieces[1];
-                    return true;
-                }
-            }
+    const std::string cmdline_key("androidboot." + android_key);
+    for (const auto& [key, value] : fs_mgr_parse_boot_config(cmdline)) {
+        if (key == cmdline_key) {
+            *out_val = value;
+            return true;
         }
     }
 
+    *out_val = "";
     return false;
 }
 
-// Tries to get the boot config value in properties, kernel cmdline and
-// device tree (in that order).  returns 'true' if successfully found, 'false'
-// otherwise
+// Tries to get the given boot config value from kernel cmdline.
+// Returns true if successfully found, false otherwise.
+bool fs_mgr_get_boot_config_from_kernel_cmdline(const std::string& key, std::string* out_val) {
+    std::string cmdline;
+    if (!android::base::ReadFileToString("/proc/cmdline", &cmdline)) return false;
+    return fs_mgr_get_boot_config_from_kernel(cmdline, key, out_val);
+}
+
+// Tries to get the boot config value in device tree, properties and
+// kernel cmdline (in that order).  Returns 'true' if successfully
+// found, 'false' otherwise.
 bool fs_mgr_get_boot_config(const std::string& key, std::string* out_val) {
     FS_MGR_CHECK(out_val != nullptr);
 
-    // first check if we have "ro.boot" property already
-    *out_val = android::base::GetProperty("ro.boot." + key, "");
-    if (!out_val->empty()) {
-        return true;
-    }
-
-    // fallback to kernel cmdline, properties may not be ready yet
-    if (fs_mgr_get_boot_config_from_kernel_cmdline(key, out_val)) {
-        return true;
-    }
-
-    // lastly, check the device tree
+    // firstly, check the device tree
     if (is_dt_compatible()) {
         std::string file_name = get_android_dt_dir() + "/" + key;
         if (android::base::ReadFileToString(file_name, out_val)) {
@@ -73,5 +101,16 @@
         }
     }
 
+    // next, check if we have "ro.boot" property already
+    *out_val = android::base::GetProperty("ro.boot." + key, "");
+    if (!out_val->empty()) {
+        return true;
+    }
+
+    // finally, fallback to kernel cmdline, properties may not be ready yet
+    if (fs_mgr_get_boot_config_from_kernel_cmdline(key, out_val)) {
+        return true;
+    }
+
     return false;
 }
diff --git a/fs_mgr/fs_mgr_dm_ioctl.cpp b/fs_mgr/fs_mgr_dm_ioctl.cpp
index 4cbd5a8..3a7fae4 100644
--- a/fs_mgr/fs_mgr_dm_ioctl.cpp
+++ b/fs_mgr/fs_mgr_dm_ioctl.cpp
@@ -23,21 +23,20 @@
 #include "fs_mgr_priv.h"
 #include "fs_mgr_priv_dm_ioctl.h"
 
-void fs_mgr_verity_ioctl_init(struct dm_ioctl* io, const std::string& name, unsigned flags) {
-    memset(io, 0, DM_BUF_SIZE);
-    io->data_size = DM_BUF_SIZE;
+void fs_mgr_dm_ioctl_init(struct dm_ioctl* io, size_t size, const std::string& name) {
+    memset(io, 0, size);
+    io->data_size = size;
     io->data_start = sizeof(struct dm_ioctl);
     io->version[0] = 4;
     io->version[1] = 0;
     io->version[2] = 0;
-    io->flags = flags | DM_READONLY_FLAG;
     if (!name.empty()) {
         strlcpy(io->name, name.c_str(), sizeof(io->name));
     }
 }
 
-bool fs_mgr_create_verity_device(struct dm_ioctl* io, const std::string& name, int fd) {
-    fs_mgr_verity_ioctl_init(io, name, 1);
+bool fs_mgr_dm_create_device(struct dm_ioctl* io, const std::string& name, int fd) {
+    fs_mgr_dm_ioctl_init(io, sizeof(*io), name);
     if (ioctl(fd, DM_DEV_CREATE, io)) {
         PERROR << "Error creating device mapping";
         return false;
@@ -45,8 +44,8 @@
     return true;
 }
 
-bool fs_mgr_destroy_verity_device(struct dm_ioctl* io, const std::string& name, int fd) {
-    fs_mgr_verity_ioctl_init(io, name, 0);
+bool fs_mgr_dm_destroy_device(struct dm_ioctl* io, const std::string& name, int fd) {
+    fs_mgr_dm_ioctl_init(io, sizeof(*io), name);
     if (ioctl(fd, DM_DEV_REMOVE, io)) {
         PERROR << "Error removing device mapping";
         return false;
@@ -54,13 +53,13 @@
     return true;
 }
 
-bool fs_mgr_get_verity_device_name(struct dm_ioctl* io, const std::string& name, int fd,
-                                   std::string* out_dev_name) {
+bool fs_mgr_dm_get_device_name(struct dm_ioctl* io, const std::string& name, int fd,
+                               std::string* out_dev_name) {
     FS_MGR_CHECK(out_dev_name != nullptr);
 
-    fs_mgr_verity_ioctl_init(io, name, 0);
+    fs_mgr_dm_ioctl_init(io, sizeof(*io), name);
     if (ioctl(fd, DM_DEV_STATUS, io)) {
-        PERROR << "Error fetching verity device number";
+        PERROR << "Error fetching device-mapper device number";
         return false;
     }
 
@@ -70,10 +69,10 @@
     return true;
 }
 
-bool fs_mgr_resume_verity_table(struct dm_ioctl* io, const std::string& name, int fd) {
-    fs_mgr_verity_ioctl_init(io, name, 0);
+bool fs_mgr_dm_resume_table(struct dm_ioctl* io, const std::string& name, int fd) {
+    fs_mgr_dm_ioctl_init(io, sizeof(*io), name);
     if (ioctl(fd, DM_DEV_SUSPEND, io)) {
-        PERROR << "Error activating verity device";
+        PERROR << "Error activating device table";
         return false;
     }
     return true;
diff --git a/fs_mgr/fs_mgr_dm_linear.cpp b/fs_mgr/fs_mgr_dm_linear.cpp
new file mode 100644
index 0000000..b2f3a68
--- /dev/null
+++ b/fs_mgr/fs_mgr_dm_linear.cpp
@@ -0,0 +1,141 @@
+/*
+ * 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.
+ */
+
+#include "fs_mgr_dm_linear.h"
+
+#include <inttypes.h>
+#include <linux/dm-ioctl.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <sstream>
+
+#include <android-base/logging.h>
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+#include <android-base/unique_fd.h>
+
+#include "fs_mgr_priv.h"
+#include "fs_mgr_priv_dm_ioctl.h"
+
+namespace android {
+namespace fs_mgr {
+
+std::string LogicalPartitionExtent::Serialize() const {
+    // Note: we need to include an explicit null-terminator.
+    std::string argv =
+        android::base::StringPrintf("%s %" PRIu64, block_device_.c_str(), first_sector_);
+    argv.push_back(0);
+
+    // The kernel expects each target to be aligned.
+    size_t spec_bytes = sizeof(struct dm_target_spec) + argv.size();
+    size_t padding = ((spec_bytes + 7) & ~7) - spec_bytes;
+    for (size_t i = 0; i < padding; i++) {
+        argv.push_back(0);
+    }
+
+    struct dm_target_spec spec;
+    spec.sector_start = logical_sector_;
+    spec.length = num_sectors_;
+    spec.status = 0;
+    strcpy(spec.target_type, "linear");
+    spec.next = sizeof(struct dm_target_spec) + argv.size();
+
+    return std::string((char*)&spec, sizeof(spec)) + argv;
+}
+
+static bool LoadDmTable(int dm_fd, const LogicalPartition& partition) {
+    // Combine all dm_target_spec buffers together.
+    std::string target_string;
+    for (const auto& extent : partition.extents) {
+        target_string += extent.Serialize();
+    }
+
+    // Allocate the ioctl buffer.
+    size_t buffer_size = sizeof(struct dm_ioctl) + target_string.size();
+    std::unique_ptr<uint8_t[]> buffer = std::make_unique<uint8_t[]>(buffer_size);
+
+    // Initialize the ioctl buffer header, then copy our target specs in.
+    struct dm_ioctl* io = reinterpret_cast<struct dm_ioctl*>(buffer.get());
+    fs_mgr_dm_ioctl_init(io, buffer_size, partition.name);
+    io->target_count = partition.extents.size();
+    if (partition.attributes & kPartitionReadonly) {
+        io->flags |= DM_READONLY_FLAG;
+    }
+    memcpy(io + 1, target_string.c_str(), target_string.size());
+
+    if (ioctl(dm_fd, DM_TABLE_LOAD, io)) {
+        PERROR << "Failed ioctl() on DM_TABLE_LOAD, partition " << partition.name;
+        return false;
+    }
+    return true;
+}
+
+static bool LoadTablesAndActivate(int dm_fd, const LogicalPartition& partition) {
+    if (!LoadDmTable(dm_fd, partition)) {
+        return false;
+    }
+
+    struct dm_ioctl io;
+    return fs_mgr_dm_resume_table(&io, partition.name, dm_fd);
+}
+
+static bool CreateDmDeviceForPartition(int dm_fd, const LogicalPartition& partition) {
+    struct dm_ioctl io;
+    if (!fs_mgr_dm_create_device(&io, partition.name, dm_fd)) {
+        return false;
+    }
+    if (!LoadTablesAndActivate(dm_fd, partition)) {
+        // Remove the device rather than leave it in an inactive state.
+        fs_mgr_dm_destroy_device(&io, partition.name, dm_fd);
+        return false;
+    }
+
+    LINFO << "Created device-mapper device: " << partition.name;
+    return true;
+}
+
+bool CreateLogicalPartitions(const LogicalPartitionTable& table) {
+    android::base::unique_fd dm_fd(open("/dev/device-mapper", O_RDWR));
+    if (dm_fd < 0) {
+        PLOG(ERROR) << "failed to open /dev/device-mapper";
+        return false;
+    }
+    for (const auto& partition : table.partitions) {
+        if (!CreateDmDeviceForPartition(dm_fd, partition)) {
+            LOG(ERROR) << "could not create dm-linear device for partition: " << partition.name;
+            return false;
+        }
+    }
+    return true;
+}
+
+std::unique_ptr<LogicalPartitionTable> LoadPartitionsFromDeviceTree() {
+    return nullptr;
+}
+
+}  // namespace fs_mgr
+}  // namespace android
diff --git a/fs_mgr/fs_mgr_fstab.cpp b/fs_mgr/fs_mgr_fstab.cpp
index 68cc530..a14dba3 100644
--- a/fs_mgr/fs_mgr_fstab.cpp
+++ b/fs_mgr/fs_mgr_fstab.cpp
@@ -33,6 +33,8 @@
 
 #include "fs_mgr_priv.h"
 
+using android::base::StartsWith;
+
 const std::string kDefaultAndroidDtDir("/proc/device-tree/firmware/android");
 
 struct fs_mgr_flag_values {
@@ -107,6 +109,7 @@
     {"logicalblk=", MF_LOGICALBLKSIZE},
     {"sysfs_path=", MF_SYSFS},
     {"defaults", 0},
+    {"logical", MF_LOGICAL},
     {0, 0},
 };
 
@@ -625,6 +628,10 @@
         fstab->recs[cnt].erase_blk_size = flag_vals.erase_blk_size;
         fstab->recs[cnt].logical_blk_size = flag_vals.logical_blk_size;
         fstab->recs[cnt].sysfs_path = flag_vals.sysfs_path;
+        if (fstab->recs[cnt].fs_mgr_flags & MF_LOGICAL) {
+            fstab->recs[cnt].logical_partition_name = strdup(fstab->recs[cnt].blk_device);
+        }
+
         cnt++;
     }
     /* If an A/B partition, modify block device to be the real block device */
@@ -672,7 +679,6 @@
     // We can't call fs_mgr_free_fstab because a->recs still references the
     // memory allocated by strdup.
     free(b->recs);
-    free(b->fstab_filename);
     free(b);
 
     a->num_entries = total_entries;
@@ -734,9 +740,7 @@
     }
 
     fstab = fs_mgr_read_fstab_file(fstab_file);
-    if (fstab) {
-        fstab->fstab_filename = strdup(fstab_path);
-    } else {
+    if (!fstab) {
         LERROR << __FUNCTION__ << "(): failed to load fstab from : '" << fstab_path << "'";
     }
 
@@ -834,6 +838,7 @@
     for (i = 0; i < fstab->num_entries; i++) {
         /* Free the pointers return by strdup(3) */
         free(fstab->recs[i].blk_device);
+        free(fstab->recs[i].logical_partition_name);
         free(fstab->recs[i].mount_point);
         free(fstab->recs[i].fs_type);
         free(fstab->recs[i].fs_options);
@@ -846,9 +851,6 @@
     /* Free the fstab_recs array created by calloc(3) */
     free(fstab->recs);
 
-    /* Free the fstab filename */
-    free(fstab->fstab_filename);
-
     /* Free fstab */
     free(fstab);
 }
@@ -998,3 +1000,7 @@
 {
     return fstab->fs_mgr_flags & MF_SYSFS;
 }
+
+int fs_mgr_is_logical(const struct fstab_rec* fstab) {
+    return fstab->fs_mgr_flags & MF_LOGICAL;
+}
diff --git a/fs_mgr/fs_mgr_priv.h b/fs_mgr/fs_mgr_priv.h
index 9011bb3..a347faf 100644
--- a/fs_mgr/fs_mgr_priv.h
+++ b/fs_mgr/fs_mgr_priv.h
@@ -82,6 +82,7 @@
  *
  */
 
+// clang-format off
 #define MF_WAIT                  0x1
 #define MF_CHECK                 0x2
 #define MF_CRYPT                 0x4
@@ -111,6 +112,8 @@
 #define MF_AVB             0X2000000
 #define MF_KEYDIRECTORY    0X4000000
 #define MF_SYSFS           0X8000000
+#define MF_LOGICAL        0x10000000
+// clang-format on
 
 #define DM_BUF_SIZE 4096
 
diff --git a/fs_mgr/fs_mgr_priv_boot_config.h b/fs_mgr/fs_mgr_priv_boot_config.h
index d98dc02..417fb38 100644
--- a/fs_mgr/fs_mgr_priv_boot_config.h
+++ b/fs_mgr/fs_mgr_priv_boot_config.h
@@ -19,7 +19,13 @@
 
 #include <sys/cdefs.h>
 #include <string>
+#include <utility>
+#include <vector>
 
+std::vector<std::pair<std::string, std::string>> fs_mgr_parse_boot_config(const std::string& cmdline);
+
+bool fs_mgr_get_boot_config_from_kernel(const std::string& cmdline, const std::string& key,
+                                        std::string* out_val);
 bool fs_mgr_get_boot_config_from_kernel_cmdline(const std::string& key, std::string* out_val);
 bool fs_mgr_get_boot_config(const std::string& key, std::string* out_val);
 
diff --git a/fs_mgr/fs_mgr_priv_dm_ioctl.h b/fs_mgr/fs_mgr_priv_dm_ioctl.h
index a00a9c1..792475d 100644
--- a/fs_mgr/fs_mgr_priv_dm_ioctl.h
+++ b/fs_mgr/fs_mgr_priv_dm_ioctl.h
@@ -20,15 +20,15 @@
 #include <linux/dm-ioctl.h>
 #include <string>
 
-void fs_mgr_verity_ioctl_init(struct dm_ioctl* io, const std::string& name, unsigned flags);
+void fs_mgr_dm_ioctl_init(struct dm_ioctl* io, size_t size, const std::string& name);
 
-bool fs_mgr_create_verity_device(struct dm_ioctl* io, const std::string& name, int fd);
+bool fs_mgr_dm_create_device(struct dm_ioctl* io, const std::string& name, int fd);
 
-bool fs_mgr_destroy_verity_device(struct dm_ioctl* io, const std::string& name, int fd);
+bool fs_mgr_dm_destroy_device(struct dm_ioctl* io, const std::string& name, int fd);
 
-bool fs_mgr_get_verity_device_name(struct dm_ioctl* io, const std::string& name, int fd,
-                                   std::string* out_dev_name);
+bool fs_mgr_dm_get_device_name(struct dm_ioctl* io, const std::string& name, int fd,
+                               std::string* out_dev_name);
 
-bool fs_mgr_resume_verity_table(struct dm_ioctl* io, const std::string& name, int fd);
+bool fs_mgr_dm_resume_table(struct dm_ioctl* io, const std::string& name, int fd);
 
 #endif /* __CORE_FS_MGR_PRIV_DM_IOCTL_H */
diff --git a/fs_mgr/fs_mgr_slotselect.cpp b/fs_mgr/fs_mgr_slotselect.cpp
index 0a113b4..3b01d0e 100644
--- a/fs_mgr/fs_mgr_slotselect.cpp
+++ b/fs_mgr/fs_mgr_slotselect.cpp
@@ -36,19 +36,30 @@
     std::string ab_suffix;
 
     for (n = 0; n < fstab->num_entries; n++) {
-        if (fstab->recs[n].fs_mgr_flags & MF_SLOTSELECT) {
-            char *tmp;
+        fstab_rec& record = fstab->recs[n];
+        if (record.fs_mgr_flags & MF_SLOTSELECT) {
             if (ab_suffix.empty()) {
                 ab_suffix = fs_mgr_get_slot_suffix();
                 // Return false if failed to get ab_suffix when MF_SLOTSELECT is specified.
                 if (ab_suffix.empty()) return false;
             }
-            if (asprintf(&tmp, "%s%s", fstab->recs[n].blk_device, ab_suffix.c_str()) > 0) {
-                free(fstab->recs[n].blk_device);
-                fstab->recs[n].blk_device = tmp;
-            } else {
+
+            char* new_blk_device;
+            if (asprintf(&new_blk_device, "%s%s", record.blk_device, ab_suffix.c_str()) <= 0) {
                 return false;
             }
+            free(record.blk_device);
+            record.blk_device = new_blk_device;
+
+            char* new_partition_name;
+            if (record.logical_partition_name) {
+                if (asprintf(&new_partition_name, "%s%s", record.logical_partition_name,
+                             ab_suffix.c_str()) <= 0) {
+                    return false;
+                }
+                free(record.logical_partition_name);
+                record.logical_partition_name = new_partition_name;
+            }
         }
     }
     return true;
diff --git a/fs_mgr/fs_mgr_verity.cpp b/fs_mgr/fs_mgr_verity.cpp
index 896b603..fe41f8a 100644
--- a/fs_mgr/fs_mgr_verity.cpp
+++ b/fs_mgr/fs_mgr_verity.cpp
@@ -258,12 +258,13 @@
     char *buffer = (char*) io;
     size_t bufsize;
 
-    fs_mgr_verity_ioctl_init(io, name, DM_STATUS_TABLE_FLAG);
+    fs_mgr_dm_ioctl_init(io, DM_BUF_SIZE, name);
 
     struct dm_target_spec *tgt = (struct dm_target_spec *) &buffer[sizeof(struct dm_ioctl)];
 
     // set tgt arguments
     io->target_count = 1;
+    io->flags = DM_READONLY_FLAG;
     tgt->status = 0;
     tgt->sector_start = 0;
     tgt->length = device_size / 512;
@@ -804,13 +805,13 @@
     }
 
     // create the device
-    if (!fs_mgr_create_verity_device(io, mount_point, fd)) {
+    if (!fs_mgr_dm_create_device(io, mount_point, fd)) {
         LERROR << "Couldn't create verity device!";
         goto out;
     }
 
     // get the name of the device file
-    if (!fs_mgr_get_verity_device_name(io, mount_point, fd, &verity_blk_name)) {
+    if (!fs_mgr_dm_get_device_name(io, mount_point, fd, &verity_blk_name)) {
         LERROR << "Couldn't get verity device number!";
         goto out;
     }
@@ -899,7 +900,7 @@
 loaded:
 
     // activate the device
-    if (!fs_mgr_resume_verity_table(io, mount_point, fd)) {
+    if (!fs_mgr_dm_resume_table(io, mount_point, fd)) {
         goto out;
     }
 
@@ -922,7 +923,7 @@
     if (!verified_at_boot) {
         free(fstab->blk_device);
         fstab->blk_device = strdup(verity_blk_name.c_str());
-    } else if (!fs_mgr_destroy_verity_device(io, mount_point, fd)) {
+    } else if (!fs_mgr_dm_destroy_device(io, mount_point, fd)) {
         LERROR << "Failed to remove verity device " << mount_point.c_str();
         goto out;
     }
diff --git a/fs_mgr/include/fs_mgr.h b/fs_mgr/include/fs_mgr.h
index 653d8fa..c1b2ed9 100644
--- a/fs_mgr/include/fs_mgr.h
+++ b/fs_mgr/include/fs_mgr.h
@@ -70,12 +70,12 @@
                     char *tmp_mount_point);
 int fs_mgr_do_mount_one(struct fstab_rec *rec);
 int fs_mgr_do_tmpfs_mount(const char *n_name);
-int fs_mgr_unmount_all(struct fstab *fstab);
 struct fstab_rec const* fs_mgr_get_crypt_entry(struct fstab const* fstab);
 void fs_mgr_get_crypt_info(struct fstab* fstab, char* key_loc, char* real_blk_device, size_t size);
 bool fs_mgr_load_verity_state(int* mode);
 bool fs_mgr_update_verity_state(fs_mgr_verity_state_callback callback);
 int fs_mgr_swapon_all(struct fstab *fstab);
+bool fs_mgr_update_logical_partition(struct fstab_rec* rec);
 
 int fs_mgr_do_format(struct fstab_rec *fstab, bool reserve_footer);
 
diff --git a/fs_mgr/include/fs_mgr_dm_linear.h b/fs_mgr/include/fs_mgr_dm_linear.h
new file mode 100644
index 0000000..7f928e5
--- /dev/null
+++ b/fs_mgr/include/fs_mgr_dm_linear.h
@@ -0,0 +1,99 @@
+/*
+ * 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.
+ */
+
+#ifndef __CORE_FS_MGR_DM_LINEAR_H
+#define __CORE_FS_MGR_DM_LINEAR_H
+
+#include <stdint.h>
+#include <memory>
+#include <string>
+#include <vector>
+
+namespace android {
+namespace fs_mgr {
+
+static const uint32_t kPartitionReadonly = 0x1;
+
+class LogicalPartitionExtent {
+  public:
+    LogicalPartitionExtent() : logical_sector_(0), first_sector_(0), num_sectors_(0) {}
+    LogicalPartitionExtent(uint64_t logical_sector, uint64_t first_sector, uint64_t num_sectors,
+                           const std::string& block_device)
+        : logical_sector_(logical_sector),
+          first_sector_(first_sector),
+          num_sectors_(num_sectors),
+          block_device_(block_device) {}
+
+    // Return a string containing the dm_target_spec buffer needed to use this
+    // extent in a device-mapper table.
+    std::string Serialize() const;
+
+    const std::string& block_device() const { return block_device_; }
+
+  private:
+    // Logical sector this extent represents in the presented block device.
+    // This is equal to the previous extent's logical sector plus the number
+    // of sectors in that extent. The first extent always starts at 0.
+    uint64_t logical_sector_;
+    // First 512-byte sector of this extent, on the source block device.
+    uint64_t first_sector_;
+    // Number of 512-byte sectors.
+    uint64_t num_sectors_;
+    // Target block device.
+    std::string block_device_;
+};
+
+struct LogicalPartition {
+    LogicalPartition() : attributes(0), num_sectors(0) {}
+
+    std::string name;
+    uint32_t attributes;
+    // Number of 512-byte sectors total.
+    uint64_t num_sectors;
+    // List of extents.
+    std::vector<LogicalPartitionExtent> extents;
+};
+
+struct LogicalPartitionTable {
+    // List of partitions in the partition table.
+    std::vector<LogicalPartition> partitions;
+};
+
+// Load a dm-linear table from the device tree if one is available; otherwise,
+// return null.
+std::unique_ptr<LogicalPartitionTable> LoadPartitionsFromDeviceTree();
+
+// Create device-mapper devices for the given partition table.
+//
+// On success, two devices nodes will be created for each partition, both
+// pointing to the same device:
+//   /dev/block/dm-<N> where N is a sequential ID assigned by device-mapper.
+//   /dev/block/dm-<name> where |name| is the partition name.
+//
+bool CreateLogicalPartitions(const LogicalPartitionTable& table);
+
+}  // namespace fs_mgr
+}  // namespace android
+
+#endif  // __CORE_FS_MGR_DM_LINEAR_H
diff --git a/fs_mgr/include_fstab/fstab/fstab.h b/fs_mgr/include_fstab/fstab/fstab.h
index e8da2ac..b1ee328 100644
--- a/fs_mgr/include_fstab/fstab/fstab.h
+++ b/fs_mgr/include_fstab/fstab/fstab.h
@@ -33,11 +33,11 @@
 struct fstab {
     int num_entries;
     struct fstab_rec* recs;
-    char* fstab_filename;
 };
 
 struct fstab_rec {
     char* blk_device;
+    char* logical_partition_name;
     char* mount_point;
     char* fs_type;
     unsigned long flags;
@@ -85,6 +85,7 @@
 int fs_mgr_is_nofail(const struct fstab_rec* fstab);
 int fs_mgr_is_latemount(const struct fstab_rec* fstab);
 int fs_mgr_is_quota(const struct fstab_rec* fstab);
+int fs_mgr_is_logical(const struct fstab_rec* fstab);
 int fs_mgr_has_sysfs_path(const struct fstab_rec* fstab);
 
 std::string fs_mgr_get_slot_suffix();
diff --git a/fs_mgr/libdm/Android.bp b/fs_mgr/libdm/Android.bp
new file mode 100644
index 0000000..672d401
--- /dev/null
+++ b/fs_mgr/libdm/Android.bp
@@ -0,0 +1,37 @@
+//
+// 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_library_static {
+    name: "libdm",
+    recovery_available: true,
+
+    export_include_dirs: ["include"],
+    cflags: [
+        // TODO(b/110035986): Allows us to create a skeleton of required classes
+        "-Wno-unused-private-field",
+    ],
+
+    srcs: [
+        "dm_table.cpp",
+        "dm_target.cpp",
+        "dm.cpp"
+    ],
+
+    header_libs: [
+        "libbase_headers",
+        "liblog_headers",
+    ],
+}
diff --git a/fs_mgr/libdm/dm.cpp b/fs_mgr/libdm/dm.cpp
new file mode 100644
index 0000000..57c1270
--- /dev/null
+++ b/fs_mgr/libdm/dm.cpp
@@ -0,0 +1,270 @@
+/*
+ * 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 <linux/dm-ioctl.h>
+#include <stdint.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include <android-base/logging.h>
+#include <android-base/macros.h>
+#include <android-base/unique_fd.h>
+
+#include "dm.h"
+
+namespace android {
+namespace dm {
+
+DeviceMapper& DeviceMapper::Instance() {
+    static DeviceMapper instance;
+    return instance;
+}
+// Creates a new device mapper device
+bool DeviceMapper::CreateDevice(const std::string& name) {
+    if (name.empty()) {
+        LOG(ERROR) << "Unnamed device mapper device creation is not supported";
+        return false;
+    }
+
+    if (name.size() >= DM_NAME_LEN) {
+        LOG(ERROR) << "[" << name << "] is too long to be device mapper name";
+        return false;
+    }
+
+    std::unique_ptr<struct dm_ioctl, decltype(&free)> io(
+            static_cast<struct dm_ioctl*>(malloc(sizeof(struct dm_ioctl))), free);
+    if (io == nullptr) {
+        LOG(ERROR) << "Failed to allocate dm_ioctl";
+        return false;
+    }
+    InitIo(io.get(), name);
+
+    if (ioctl(fd_, DM_DEV_CREATE, io.get())) {
+        PLOG(ERROR) << "DM_DEV_CREATE failed to create [" << name << "]";
+        return false;
+    }
+
+    // Check to make sure the newly created device doesn't already have targets
+    // added or opened by someone
+    CHECK(io->target_count == 0) << "Unexpected targets for newly created [" << name << "] device";
+    CHECK(io->open_count == 0) << "Unexpected opens for newly created [" << name << "] device";
+
+    // Creates a new device mapper device with the name passed in
+    return true;
+}
+
+bool DeviceMapper::DeleteDevice(const std::string& name) {
+    if (name.empty()) {
+        LOG(ERROR) << "Unnamed device mapper device creation is not supported";
+        return false;
+    }
+
+    if (name.size() >= DM_NAME_LEN) {
+        LOG(ERROR) << "[" << name << "] is too long to be device mapper name";
+        return false;
+    }
+
+    std::unique_ptr<struct dm_ioctl, decltype(&free)> io(
+            static_cast<struct dm_ioctl*>(malloc(sizeof(struct dm_ioctl))), free);
+    if (io == nullptr) {
+        LOG(ERROR) << "Failed to allocate dm_ioctl";
+        return false;
+    }
+    InitIo(io.get(), name);
+
+    if (ioctl(fd_, DM_DEV_REMOVE, io.get())) {
+        PLOG(ERROR) << "DM_DEV_REMOVE failed to create [" << name << "]";
+        return false;
+    }
+
+    // Check to make sure appropriate uevent is generated so ueventd will
+    // do the right thing and remove the corresponding device node and symlinks.
+    CHECK(io->flags & DM_UEVENT_GENERATED_FLAG)
+            << "Didn't generate uevent for [" << name << "] removal";
+
+    return true;
+}
+
+const std::unique_ptr<DmTable> DeviceMapper::table(const std::string& /* name */) const {
+    // TODO(b/110035986): Return the table, as read from the kernel instead
+    return nullptr;
+}
+
+DmDeviceState DeviceMapper::state(const std::string& /* name */) const {
+    // TODO(b/110035986): Return the state, as read from the kernel instead
+    return DmDeviceState::INVALID;
+}
+
+bool DeviceMapper::LoadTableAndActivate(const std::string& /* name */, const DmTable& /* table */) {
+    return false;
+}
+
+// Reads all the available device mapper targets and their corresponding
+// versions from the kernel and returns in a vector
+bool DeviceMapper::GetAvailableTargets(std::vector<DmTarget>* targets) {
+    targets->clear();
+
+    // calculate the space needed to read a maximum of kMaxPossibleDmTargets
+    uint32_t payload_size = sizeof(struct dm_target_versions);
+    payload_size += DM_MAX_TYPE_NAME;
+    // device mapper wants every target spec to be aligned at 8-byte boundary
+    payload_size = DM_ALIGN(payload_size);
+    payload_size *= kMaxPossibleDmTargets;
+
+    uint32_t data_size = sizeof(struct dm_ioctl) + payload_size;
+    auto buffer = std::unique_ptr<void, void (*)(void*)>(calloc(1, data_size), free);
+    if (buffer == nullptr) {
+        LOG(ERROR) << "failed to allocate memory";
+        return false;
+    }
+
+    // Sets appropriate data size and data_start to make sure we tell kernel
+    // about the total size of the buffer we are passing and where to start
+    // writing the list of targets.
+    struct dm_ioctl* io = reinterpret_cast<struct dm_ioctl*>(buffer.get());
+    InitIo(io);
+    io->data_size = data_size;
+    io->data_start = sizeof(*io);
+
+    if (ioctl(fd_, DM_LIST_VERSIONS, io)) {
+        PLOG(ERROR) << "Failed to get DM_LIST_VERSIONS from kernel";
+        return false;
+    }
+
+    // If the provided buffer wasn't enough to list all targets, note that
+    // any data beyond sizeof(*io) must not be read in this case
+    if (io->flags & DM_BUFFER_FULL_FLAG) {
+        LOG(INFO) << data_size << " is not enough memory to list all dm targets";
+        return false;
+    }
+
+    // if there are no targets registered, return success with empty vector
+    if (io->data_size == sizeof(*io)) {
+        return true;
+    }
+
+    // Parse each target and list the name and version
+    // TODO(b/110035986): Templatize this
+    uint32_t next = sizeof(*io);
+    data_size = io->data_size - next;
+    struct dm_target_versions* vers =
+            reinterpret_cast<struct dm_target_versions*>(static_cast<char*>(buffer.get()) + next);
+    while (next && data_size) {
+        targets->emplace_back((vers));
+        if (vers->next == 0) {
+            break;
+        }
+        next += vers->next;
+        data_size -= vers->next;
+        vers = reinterpret_cast<struct dm_target_versions*>(static_cast<char*>(buffer.get()) + next);
+    }
+
+    return true;
+}
+
+bool DeviceMapper::GetAvailableDevices(std::vector<DmBlockDevice>* devices) {
+    devices->clear();
+
+    // calculate the space needed to read a maximum of 256 targets, each with
+    // name with maximum length of 16 bytes
+    uint32_t payload_size = sizeof(struct dm_name_list);
+    // 128-bytes for the name
+    payload_size += DM_NAME_LEN;
+    // dm wants every device spec to be aligned at 8-byte boundary
+    payload_size = DM_ALIGN(payload_size);
+    payload_size *= kMaxPossibleDmDevices;
+    uint32_t data_size = sizeof(struct dm_ioctl) + payload_size;
+    auto buffer = std::unique_ptr<void, void (*)(void*)>(calloc(1, data_size), free);
+    if (buffer == nullptr) {
+        LOG(ERROR) << "failed to allocate memory";
+        return false;
+    }
+
+    // Sets appropriate data size and data_start to make sure we tell kernel
+    // about the total size of the buffer we are passing and where to start
+    // writing the list of targets.
+    struct dm_ioctl* io = reinterpret_cast<struct dm_ioctl*>(buffer.get());
+    InitIo(io);
+    io->data_size = data_size;
+    io->data_start = sizeof(*io);
+
+    if (ioctl(fd_, DM_LIST_DEVICES, io)) {
+        PLOG(ERROR) << "Failed to get DM_LIST_DEVICES from kernel";
+        return false;
+    }
+
+    // If the provided buffer wasn't enough to list all devices any data
+    // beyond sizeof(*io) must not be read.
+    if (io->flags & DM_BUFFER_FULL_FLAG) {
+        LOG(INFO) << data_size << " is not enough memory to list all dm devices";
+        return false;
+    }
+
+    // if there are no devices created yet, return success with empty vector
+    if (io->data_size == sizeof(*io)) {
+        return true;
+    }
+
+    // Parse each device and add a new DmBlockDevice to the vector
+    // created from the kernel data.
+    uint32_t next = sizeof(*io);
+    data_size = io->data_size - next;
+    struct dm_name_list* dm_dev =
+            reinterpret_cast<struct dm_name_list*>(static_cast<char*>(buffer.get()) + next);
+
+    while (next && data_size) {
+        devices->emplace_back((dm_dev));
+        if (dm_dev->next == 0) {
+            break;
+        }
+        next += dm_dev->next;
+        data_size -= dm_dev->next;
+        dm_dev = reinterpret_cast<struct dm_name_list*>(static_cast<char*>(buffer.get()) + next);
+    }
+
+    return true;
+}
+
+// Accepts a device mapper device name (like system_a, vendor_b etc) and
+// returns the path to it's device node (or symlink to the device node)
+std::string DeviceMapper::GetDmDevicePathByName(const std::string& /* name */) {
+    return "";
+}
+
+// private methods of DeviceMapper
+void DeviceMapper::InitIo(struct dm_ioctl* io, const std::string& name) const {
+    CHECK(io != nullptr) << "nullptr passed to dm_ioctl initialization";
+    memset(io, 0, sizeof(*io));
+
+    io->version[0] = DM_VERSION0;
+    io->version[1] = DM_VERSION1;
+    io->version[2] = DM_VERSION2;
+    io->data_size = sizeof(*io);
+    io->data_start = 0;
+    if (!name.empty()) {
+        strlcpy(io->name, name.c_str(), sizeof(io->name));
+    }
+}
+
+}  // namespace dm
+}  // namespace android
diff --git a/fs_mgr/libdm/dm_table.cpp b/fs_mgr/libdm/dm_table.cpp
new file mode 100644
index 0000000..14b3932
--- /dev/null
+++ b/fs_mgr/libdm/dm_table.cpp
@@ -0,0 +1,55 @@
+/*
+ * 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/logging.h>
+#include <android-base/macros.h>
+
+#include <string>
+#include <vector>
+
+#include "dm_table.h"
+
+namespace android {
+namespace dm {
+
+bool DmTable::AddTarget(std::unique_ptr<DmTarget>&& /* target */) {
+    return true;
+}
+
+bool DmTable::RemoveTarget(std::unique_ptr<DmTarget>&& /* target */) {
+    return true;
+}
+
+bool DmTable::valid() const {
+    return true;
+}
+
+uint64_t DmTable::size() const {
+    return valid() ? size_ : 0;
+}
+
+// Returns a string represnetation of the table that is ready to be passed
+// down to the kernel for loading
+//
+// Implementation must verify there are no gaps in the table, table starts
+// with sector == 0, and iterate over each target to get its table
+// serialized.
+std::string DmTable::Serialize() const {
+    return "";
+}
+
+}  // namespace dm
+}  // namespace android
diff --git a/adb/transport_mdns_unsupported.cpp b/fs_mgr/libdm/dm_target.cpp
similarity index 66%
copy from adb/transport_mdns_unsupported.cpp
copy to fs_mgr/libdm/dm_target.cpp
index 387d341..8bcd526 100644
--- a/adb/transport_mdns_unsupported.cpp
+++ b/fs_mgr/libdm/dm_target.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2016 The Android Open Source Project
+ * 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.
@@ -14,5 +14,16 @@
  * limitations under the License.
  */
 
-/* For when mDNS discovery is unsupported */
-void init_mdns_transport_discovery(void) {}
+#include <android-base/logging.h>
+#include <android-base/macros.h>
+
+#include <stdint.h>
+
+#include <string>
+#include <vector>
+
+#include "dm_target.h"
+
+namespace android {
+namespace dm {}  // namespace dm
+}  // namespace android
diff --git a/fs_mgr/libdm/include/dm.h b/fs_mgr/libdm/include/dm.h
new file mode 100644
index 0000000..52a9a11
--- /dev/null
+++ b/fs_mgr/libdm/include/dm.h
@@ -0,0 +1,152 @@
+/*
+ *  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 _LIBDM_DM_H_
+#define _LIBDM_DM_H_
+
+#include <errno.h>
+#include <fcntl.h>
+#include <linux/dm-ioctl.h>
+#include <linux/kdev_t.h>
+#include <sys/sysmacros.h>
+#include <unistd.h>
+
+#include <memory>
+
+#include <android-base/logging.h>
+
+#include <dm_table.h>
+
+// The minimum expected device mapper major.minor version
+#define DM_VERSION0 (4)
+#define DM_VERSION1 (0)
+#define DM_VERSION2 (0)
+
+#define DM_ALIGN_MASK (7)
+#define DM_ALIGN(x) ((x + DM_ALIGN_MASK) & ~DM_ALIGN_MASK)
+
+namespace android {
+namespace dm {
+
+enum class DmDeviceState { INVALID, SUSPENDED, ACTIVE };
+
+class DeviceMapper final {
+  public:
+    class DmBlockDevice final {
+      public:
+        // only allow creating this with dm_name_list
+        DmBlockDevice() = delete;
+
+        explicit DmBlockDevice(struct dm_name_list* d) : name_(d->name), dev_(d->dev){};
+
+        // Returs device mapper name associated with the block device
+        const std::string& name() const { return name_; }
+
+        // Return major number for the block device
+        uint32_t Major() const { return major(dev_); }
+
+        // Return minor number for the block device
+        uint32_t Minor() const { return minor(dev_); }
+        ~DmBlockDevice() = default;
+
+      private:
+        std::string name_;
+        uint64_t dev_;
+    };
+
+    // Creates a device mapper device with given name.
+    // Return 'true' on success and 'false' on failure to
+    // create OR if a device mapper device with the same name already
+    // exists.
+    // TODO(b/110035986): Make this method private and to be only
+    // called through LoadTableAndActivate() below.
+    bool CreateDevice(const std::string& name);
+
+    // Removes a device mapper device with the given name.
+    // Returns 'true' on success, false otherwise.
+    bool DeleteDevice(const std::string& name);
+
+    // Reads the device mapper table from the device with given anme and
+    // returns it in a DmTable object.
+    const std::unique_ptr<DmTable> table(const std::string& name) const;
+
+    // Returns the current state of the underlying device mapper device
+    // with given name.
+    // One of INVALID, SUSPENDED or ACTIVE.
+    DmDeviceState state(const std::string& name) const;
+
+    // Loads the device mapper table from parameter into the underlying
+    // device mapper device with given name and activate / resumes the device in the process.
+    // If a device mapper device with the 'name', doesn't exist, it will be created.
+    // Returns 'true' on success, false otherwise.
+    bool LoadTableAndActivate(const std::string& name, const DmTable& table);
+
+    // Returns true if a list of available device mapper targets registered in the kernel was
+    // successfully read and stored in 'targets'. Returns 'false' otherwise.
+    bool GetAvailableTargets(std::vector<DmTarget>* targets);
+
+    // Return 'true' if it can successfully read the list of device mapper block devices
+    // currently created. 'devices' will be empty if the kernel interactions
+    // were successful and there are no block devices at the moment. Returns
+    // 'false' in case of any failure along the way.
+    bool GetAvailableDevices(std::vector<DmBlockDevice>* devices);
+
+    // Returns the path to the device mapper device node in '/dev' corresponding to
+    // 'name'.
+    std::string GetDmDevicePathByName(const std::string& name);
+
+    // The only way to create a DeviceMapper object.
+    static DeviceMapper& Instance();
+
+    ~DeviceMapper() {
+        if (fd_ != -1) {
+            ::close(fd_);
+        }
+    }
+
+  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
+    // a finite amount of memory. This limit is in no way enforced by the kernel.
+    static constexpr uint32_t kMaxPossibleDmTargets = 256;
+
+    // Maximum possible device mapper created block devices. Note that this is restricted by
+    // the minor numbers (that used to be 8 bits) that can be range from 0 to 2^20-1 in newer
+    // kernels. In Android systems however, we never expect these to grow beyond the artificial
+    // limit we are imposing here of 256.
+    static constexpr uint32_t kMaxPossibleDmDevices = 256;
+
+    void InitIo(struct dm_ioctl* io, const std::string& name = std::string()) const;
+
+    DeviceMapper() : fd_(-1) {
+        fd_ = TEMP_FAILURE_RETRY(open("/dev/device-mapper", O_RDWR | O_CLOEXEC));
+        if (fd_ < 0) {
+            PLOG(ERROR) << "Failed to open device-mapper";
+        }
+    }
+
+    int fd_;
+    // Non-copyable & Non-movable
+    DeviceMapper(const DeviceMapper&) = delete;
+    DeviceMapper& operator=(const DeviceMapper&) = delete;
+    DeviceMapper& operator=(DeviceMapper&&) = delete;
+    DeviceMapper(DeviceMapper&&) = delete;
+};
+
+}  // namespace dm
+}  // namespace android
+
+#endif /* _LIBDM_DM_H_ */
diff --git a/fs_mgr/libdm/include/dm_table.h b/fs_mgr/libdm/include/dm_table.h
new file mode 100644
index 0000000..0b1685d
--- /dev/null
+++ b/fs_mgr/libdm/include/dm_table.h
@@ -0,0 +1,75 @@
+/*
+ *  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 _LIBDM_DMTABLE_H_
+#define _LIBDM_DMTABLE_H_
+
+#include <stdint.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "dm_target.h"
+
+namespace android {
+namespace dm {
+
+class DmTable {
+  public:
+    DmTable() : size_(0){};
+
+    // Adds a target to the device mapper table for a range specified in the target object.
+    // The function will return 'true' if the target was successfully added and doesn't overlap with
+    // any of the existing targets in the table. Gaps are allowed. The final check, including
+    // overlaps and gaps are done before loading the table. Returns 'false' on failure.
+    bool AddTarget(std::unique_ptr<DmTarget>&& target);
+
+    // Removes a target from the table for the range specified in the target object. Returns 'false'
+    // if the target name doesn't match with the one in the table. Returns 'true' if target is
+    // successfully removed.
+    bool RemoveTarget(std::unique_ptr<DmTarget>&& target);
+
+    // Checks the table to make sure it is valid. i.e. Checks for range overlaps, range gaps
+    // and returns 'true' if the table is ready to be loaded into kernel. Returns 'false' if the
+    // table is malformed.
+    bool valid() const;
+
+    // Returns the total size represented by the table in terms of number of 512-byte sectors.
+    // NOTE: This function will overlook if there are any gaps in the targets added in the table.
+    uint64_t size() const;
+
+    // Returns the string represntation of the table that is ready to be passed into the kernel
+    // as part of the DM_TABLE_LOAD ioctl.
+    std::string Serialize() const;
+
+    ~DmTable() = default;
+
+  private:
+    // list of targets defined in this table sorted by
+    // their start and end sectors.
+    // Note: Overlapping targets MUST never be added in this list.
+    std::vector<std::unique_ptr<DmTarget>> targets_;
+
+    // Total size in terms of # of sectors, as calculated by looking at the last and the first
+    // target in 'target_'.
+    uint64_t size_;
+};
+
+}  // namespace dm
+}  // namespace android
+
+#endif /* _LIBDM_DMTABLE_H_ */
diff --git a/fs_mgr/libdm/include/dm_target.h b/fs_mgr/libdm/include/dm_target.h
new file mode 100644
index 0000000..31b0cb6
--- /dev/null
+++ b/fs_mgr/libdm/include/dm_target.h
@@ -0,0 +1,77 @@
+/*
+ *  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 _LIBDM_DMTARGET_H_
+#define _LIBDM_DMTARGET_H_
+
+#include <linux/dm-ioctl.h>
+#include <stdint.h>
+
+#include <android-base/logging.h>
+
+#include <string>
+
+namespace android {
+namespace dm {
+
+class DmTarget {
+  public:
+    DmTarget(const std::string& name, uint64_t start = 0, uint64_t length = 0)
+        : name_(name), v0_(0), v1_(0), v2_(0), start_(start), length_(length){};
+
+    // Creates a DmTarget object from dm_target_version as read from kernel
+    // with DM_LIST_VERSION ioctl.
+    DmTarget(const struct dm_target_versions* vers) : start_(0), length_(0) {
+        CHECK(vers != nullptr) << "Can't create DmTarget with dm_target_versions set to nullptr";
+        v0_ = vers->version[0];
+        v1_ = vers->version[1];
+        v2_ = vers->version[2];
+        name_ = vers->name;
+    }
+
+    virtual ~DmTarget() = default;
+
+    // Returns name of the target.
+    const std::string& name() const { return name_; }
+
+    // Returns size in number of sectors when this target is part of
+    // a DmTable, return 0 otherwise.
+    uint64_t size() const { return length_; }
+
+    // Return string representation of the device mapper target version.
+    std::string version() const {
+        return std::to_string(v0_) + "." + std::to_string(v1_) + "." + std::to_string(v2_);
+    }
+
+    // Function that converts this object to a string of arguments that can
+    // be passed to the kernel for adding this target in a table. Each target (e.g. verity, linear)
+    // must implement this, for it to be used on a device.
+    virtual std::string Serialize() const { return ""; }
+
+  private:
+    // Name of the target.
+    std::string name_;
+    // Target version.
+    uint32_t v0_, v1_, v2_;
+    // logical sector number start and total length (in terms of 512-byte sectors) represented
+    // by this target within a DmTable.
+    uint64_t start_, length_;
+};
+
+}  // namespace dm
+}  // namespace android
+
+#endif /* _LIBDM_DMTARGET_H_ */
diff --git a/fs_mgr/liblp/Android.bp b/fs_mgr/liblp/Android.bp
new file mode 100644
index 0000000..d7bc6b5
--- /dev/null
+++ b/fs_mgr/liblp/Android.bp
@@ -0,0 +1,38 @@
+//
+// 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_library_static {
+    name: "liblp",
+    host_supported: true,
+    recovery_available: true,
+    defaults: ["fs_mgr_defaults"],
+    srcs: [
+        "builder.cpp",
+        "reader.cpp",
+        "utility.cpp",
+        "writer.cpp",
+    ],
+    static_libs: [
+        "libbase",
+        "liblog",
+        "libcrypto",
+        "libcrypto_utils",
+    ],
+    whole_static_libs: [
+        "libext2_uuid",
+    ],
+    export_include_dirs: ["include"],
+}
diff --git a/fs_mgr/liblp/builder.cpp b/fs_mgr/liblp/builder.cpp
new file mode 100644
index 0000000..bfbf3e5
--- /dev/null
+++ b/fs_mgr/liblp/builder.cpp
@@ -0,0 +1,352 @@
+/*
+ * 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 "liblp/builder.h"
+
+#include <string.h>
+
+#include <algorithm>
+
+#include <android-base/endian.h>
+#include <uuid/uuid.h>
+
+#include "liblp/metadata_format.h"
+#include "utility.h"
+
+namespace android {
+namespace fs_mgr {
+
+// Align a byte count up to the nearest 512-byte sector.
+template <typename T>
+static inline T AlignToSector(T value) {
+    return (value + (LP_SECTOR_SIZE - 1)) & ~T(LP_SECTOR_SIZE - 1);
+}
+
+void LinearExtent::AddTo(LpMetadata* out) const {
+    out->extents.push_back(LpMetadataExtent{num_sectors_, LP_TARGET_TYPE_LINEAR, physical_sector_});
+}
+
+void ZeroExtent::AddTo(LpMetadata* out) const {
+    out->extents.push_back(LpMetadataExtent{num_sectors_, LP_TARGET_TYPE_ZERO, 0});
+}
+
+Partition::Partition(const std::string& name, const std::string& guid, uint32_t attributes)
+    : name_(name), guid_(guid), attributes_(attributes), size_(0) {}
+
+void Partition::AddExtent(std::unique_ptr<Extent>&& extent) {
+    size_ += extent->num_sectors() * LP_SECTOR_SIZE;
+    extents_.push_back(std::move(extent));
+}
+
+void Partition::RemoveExtents() {
+    size_ = 0;
+    extents_.clear();
+}
+
+void Partition::ShrinkTo(uint64_t requested_size) {
+    uint64_t aligned_size = AlignToSector(requested_size);
+    if (size_ <= aligned_size) {
+        return;
+    }
+    if (aligned_size == 0) {
+        RemoveExtents();
+        return;
+    }
+
+    // Remove or shrink extents of any kind until the total partition size is
+    // equal to the requested size.
+    uint64_t sectors_to_remove = (size_ - aligned_size) / LP_SECTOR_SIZE;
+    while (sectors_to_remove) {
+        Extent* extent = extents_.back().get();
+        if (extent->num_sectors() > sectors_to_remove) {
+            size_ -= sectors_to_remove * LP_SECTOR_SIZE;
+            extent->set_num_sectors(extent->num_sectors() - sectors_to_remove);
+            break;
+        }
+        size_ -= (extent->num_sectors() * LP_SECTOR_SIZE);
+        sectors_to_remove -= extent->num_sectors();
+        extents_.pop_back();
+    }
+    DCHECK(size_ == requested_size);
+}
+
+std::unique_ptr<MetadataBuilder> MetadataBuilder::New(uint64_t blockdevice_size,
+                                                      uint32_t metadata_max_size,
+                                                      uint32_t metadata_slot_count) {
+    std::unique_ptr<MetadataBuilder> builder(new MetadataBuilder());
+    if (!builder->Init(blockdevice_size, metadata_max_size, metadata_slot_count)) {
+        return nullptr;
+    }
+    return builder;
+}
+
+std::unique_ptr<MetadataBuilder> MetadataBuilder::New(const LpMetadata& metadata) {
+    std::unique_ptr<MetadataBuilder> builder(new MetadataBuilder());
+    if (!builder->Init(metadata)) {
+        return nullptr;
+    }
+    return builder;
+}
+
+MetadataBuilder::MetadataBuilder() {
+    memset(&geometry_, 0, sizeof(geometry_));
+    geometry_.magic = LP_METADATA_GEOMETRY_MAGIC;
+    geometry_.struct_size = sizeof(geometry_);
+
+    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_.header_size = sizeof(header_);
+    header_.partitions.entry_size = sizeof(LpMetadataPartition);
+    header_.extents.entry_size = sizeof(LpMetadataExtent);
+}
+
+bool MetadataBuilder::Init(const LpMetadata& metadata) {
+    geometry_ = metadata.geometry;
+
+    for (const auto& partition : metadata.partitions) {
+        Partition* builder = AddPartition(GetPartitionName(partition), GetPartitionGuid(partition),
+                                          partition.attributes);
+        if (!builder) {
+            return false;
+        }
+
+        for (size_t i = 0; i < partition.num_extents; i++) {
+            const LpMetadataExtent& extent = metadata.extents[partition.first_extent_index + i];
+            if (extent.target_type == LP_TARGET_TYPE_LINEAR) {
+                auto copy = std::make_unique<LinearExtent>(extent.num_sectors, extent.target_data);
+                builder->AddExtent(std::move(copy));
+            } else if (extent.target_type == LP_TARGET_TYPE_ZERO) {
+                auto copy = std::make_unique<ZeroExtent>(extent.num_sectors);
+                builder->AddExtent(std::move(copy));
+            }
+        }
+    }
+    return true;
+}
+
+bool MetadataBuilder::Init(uint64_t blockdevice_size, uint32_t metadata_max_size,
+                           uint32_t metadata_slot_count) {
+    if (metadata_max_size < sizeof(LpMetadataHeader)) {
+        LERROR << "Invalid metadata maximum size.";
+        return false;
+    }
+    if (metadata_slot_count == 0) {
+        LERROR << "Invalid metadata slot count.";
+        return false;
+    }
+
+    // Align the metadata size up to the nearest sector.
+    metadata_max_size = AlignToSector(metadata_max_size);
+
+    // We reserve a geometry block (4KB) plus space for each copy of the
+    // maximum size of a metadata blob. Then, we double that space since
+    // we store a backup copy of everything.
+    uint64_t reserved =
+            LP_METADATA_GEOMETRY_SIZE + (uint64_t(metadata_max_size) * metadata_slot_count);
+    uint64_t total_reserved = reserved * 2;
+
+    if (blockdevice_size < total_reserved || blockdevice_size - total_reserved < LP_SECTOR_SIZE) {
+        LERROR << "Attempting to create metadata on a block device that is too small.";
+        return false;
+    }
+
+    // The last sector is inclusive. We subtract one to make sure that logical
+    // partitions won't overlap with the same sector as the backup metadata,
+    // which could happen if the block device was not aligned to LP_SECTOR_SIZE.
+    geometry_.first_logical_sector = reserved / LP_SECTOR_SIZE;
+    geometry_.last_logical_sector = ((blockdevice_size - reserved) / LP_SECTOR_SIZE) - 1;
+    geometry_.metadata_max_size = metadata_max_size;
+    geometry_.metadata_slot_count = metadata_slot_count;
+    DCHECK(geometry_.last_logical_sector >= geometry_.first_logical_sector);
+    return true;
+}
+
+Partition* MetadataBuilder::AddPartition(const std::string& name, const std::string& guid,
+                                         uint32_t attributes) {
+    if (name.empty()) {
+        LERROR << "Partition must have a non-empty name.";
+        return nullptr;
+    }
+    if (FindPartition(name)) {
+        LERROR << "Attempting to create duplication partition with name: " << name;
+        return nullptr;
+    }
+    partitions_.push_back(std::make_unique<Partition>(name, guid, attributes));
+    return partitions_.back().get();
+}
+
+Partition* MetadataBuilder::FindPartition(const std::string& name) {
+    for (const auto& partition : partitions_) {
+        if (partition->name() == name) {
+            return partition.get();
+        }
+    }
+    return nullptr;
+}
+
+void MetadataBuilder::RemovePartition(const std::string& name) {
+    for (auto iter = partitions_.begin(); iter != partitions_.end(); iter++) {
+        if ((*iter)->name() == name) {
+            partitions_.erase(iter);
+            return;
+        }
+    }
+}
+
+bool MetadataBuilder::GrowPartition(Partition* partition, uint64_t requested_size) {
+    // Align the space needed up to the nearest sector.
+    uint64_t aligned_size = AlignToSector(requested_size);
+    if (partition->size() >= aligned_size) {
+        return true;
+    }
+
+    // Figure out how much we need to allocate.
+    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);
+
+    struct Interval {
+        uint64_t start;
+        uint64_t end;
+
+        Interval(uint64_t start, uint64_t end) : start(start), end(end) {}
+        bool operator<(const Interval& other) const { return start < other.start; }
+    };
+    std::vector<Interval> intervals;
+
+    // Collect all extents in the partition table.
+    for (const auto& partition : partitions_) {
+        for (const auto& extent : partition->extents()) {
+            LinearExtent* linear = extent->AsLinearExtent();
+            if (!linear) {
+                continue;
+            }
+            intervals.emplace_back(linear->physical_sector(),
+                                   linear->physical_sector() + extent->num_sectors());
+        }
+    }
+
+    // Sort extents by starting sector.
+    std::sort(intervals.begin(), intervals.end());
+
+    // Find gaps that we can use for new extents. Note we store new extents in a
+    // temporary vector, and only commit them if we are guaranteed enough free
+    // space.
+    std::vector<std::unique_ptr<LinearExtent>> new_extents;
+    for (size_t i = 1; i < intervals.size(); i++) {
+        const Interval& previous = intervals[i - 1];
+        const Interval& current = intervals[i];
+
+        if (previous.end >= current.start) {
+            // There is no gap between these two extents, try the next one. Note that
+            // extents may never overlap, but just for safety, we ignore them if they
+            // do.
+            DCHECK(previous.end == current.start);
+            continue;
+        }
+
+        // This gap is enough to hold the remainder of the space requested, so we
+        // can allocate what we need and return.
+        if (current.start - previous.end >= sectors_needed) {
+            auto extent = std::make_unique<LinearExtent>(sectors_needed, previous.end);
+            sectors_needed -= extent->num_sectors();
+            new_extents.push_back(std::move(extent));
+            break;
+        }
+
+        // This gap is not big enough to fit the remainder of the space requested,
+        // so consume the whole thing and keep looking for more.
+        auto extent = std::make_unique<LinearExtent>(current.start - previous.end, previous.end);
+        sectors_needed -= extent->num_sectors();
+        new_extents.push_back(std::move(extent));
+    }
+
+    // If we still have more to allocate, take it from the remaining free space
+    // in the allocatable region.
+    if (sectors_needed) {
+        uint64_t first_sector;
+        if (intervals.empty()) {
+            first_sector = geometry_.first_logical_sector;
+        } else {
+            first_sector = intervals.back().end;
+        }
+        DCHECK(first_sector <= geometry_.last_logical_sector);
+
+        // Note: the last usable sector is inclusive.
+        if (first_sector + sectors_needed > geometry_.last_logical_sector) {
+            LERROR << "Not enough free space to expand partition: " << partition->name();
+            return false;
+        }
+        auto extent = std::make_unique<LinearExtent>(sectors_needed, first_sector);
+        new_extents.push_back(std::move(extent));
+    }
+
+    for (auto& extent : new_extents) {
+        partition->AddExtent(std::move(extent));
+    }
+    return true;
+}
+
+void MetadataBuilder::ShrinkPartition(Partition* partition, uint64_t requested_size) {
+    partition->ShrinkTo(requested_size);
+}
+
+std::unique_ptr<LpMetadata> MetadataBuilder::Export() {
+    std::unique_ptr<LpMetadata> metadata = std::make_unique<LpMetadata>();
+    metadata->header = header_;
+    metadata->geometry = geometry_;
+
+    // Flatten the partition and extent structures into an LpMetadata, which
+    // makes it very easy to validate, serialize, or pass on to device-mapper.
+    for (const auto& partition : partitions_) {
+        LpMetadataPartition part;
+        memset(&part, 0, sizeof(part));
+
+        if (partition->name().size() > sizeof(part.name)) {
+            LERROR << "Partition name is too long: " << partition->name();
+            return nullptr;
+        }
+        if (partition->attributes() & ~(LP_PARTITION_ATTRIBUTE_MASK)) {
+            LERROR << "Partition " << partition->name() << " has unsupported attribute.";
+            return nullptr;
+        }
+
+        strncpy(part.name, partition->name().c_str(), sizeof(part.name));
+        if (uuid_parse(partition->guid().c_str(), part.guid) != 0) {
+            LERROR << "Could not parse guid " << partition->guid() << " for partition "
+                   << partition->name();
+            return nullptr;
+        }
+
+        part.first_extent_index = static_cast<uint32_t>(metadata->extents.size());
+        part.num_extents = static_cast<uint32_t>(partition->extents().size());
+        part.attributes = partition->attributes();
+
+        for (const auto& extent : partition->extents()) {
+            extent->AddTo(metadata.get());
+        }
+        metadata->partitions.push_back(part);
+    }
+
+    metadata->header.partitions.num_entries = static_cast<uint32_t>(metadata->partitions.size());
+    metadata->header.extents.num_entries = static_cast<uint32_t>(metadata->extents.size());
+    return metadata;
+}
+
+}  // namespace fs_mgr
+}  // namespace android
diff --git a/fs_mgr/liblp/include/liblp/builder.h b/fs_mgr/liblp/include/liblp/builder.h
new file mode 100644
index 0000000..fb982e2
--- /dev/null
+++ b/fs_mgr/liblp/include/liblp/builder.h
@@ -0,0 +1,169 @@
+//
+// 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 LIBLP_METADATA_BUILDER_H
+#define LIBLP_METADATA_BUILDER_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <map>
+#include <memory>
+
+#include "metadata_format.h"
+
+namespace android {
+namespace fs_mgr {
+
+class LinearExtent;
+
+// Abstraction around dm-targets that can be encoded into logical partition tables.
+class Extent {
+  public:
+    explicit Extent(uint64_t num_sectors) : num_sectors_(num_sectors) {}
+    virtual ~Extent() {}
+
+    virtual void AddTo(LpMetadata* out) const = 0;
+    virtual LinearExtent* AsLinearExtent() { return nullptr; }
+
+    uint64_t num_sectors() const { return num_sectors_; }
+    void set_num_sectors(uint64_t num_sectors) { num_sectors_ = num_sectors; }
+
+  protected:
+    uint64_t num_sectors_;
+};
+
+// This corresponds to a dm-linear target.
+class LinearExtent final : public Extent {
+  public:
+    LinearExtent(uint64_t num_sectors, uint64_t physical_sector)
+        : Extent(num_sectors), physical_sector_(physical_sector) {}
+
+    void AddTo(LpMetadata* metadata) const override;
+    LinearExtent* AsLinearExtent() override { return this; }
+
+    uint64_t physical_sector() const { return physical_sector_; }
+
+  private:
+    uint64_t physical_sector_;
+};
+
+// This corresponds to a dm-zero target.
+class ZeroExtent final : public Extent {
+  public:
+    explicit ZeroExtent(uint64_t num_sectors) : Extent(num_sectors) {}
+
+    void AddTo(LpMetadata* out) const override;
+};
+
+class Partition final {
+  public:
+    Partition(const std::string& name, const std::string& guid, uint32_t attributes);
+
+    // Add a raw extent.
+    void AddExtent(std::unique_ptr<Extent>&& extent);
+
+    // Remove all extents from this partition.
+    void RemoveExtents();
+
+    // Remove and/or shrink extents until the partition is the requested size.
+    // See MetadataBuilder::ShrinkPartition for more information.
+    void ShrinkTo(uint64_t requested_size);
+
+    const std::string& name() const { return name_; }
+    uint32_t attributes() const { return attributes_; }
+    const std::string& guid() const { return guid_; }
+    const std::vector<std::unique_ptr<Extent>>& extents() const { return extents_; }
+    uint64_t size() const { return size_; }
+
+  private:
+    std::string name_;
+    std::string guid_;
+    std::vector<std::unique_ptr<Extent>> extents_;
+    uint32_t attributes_;
+    uint64_t size_;
+};
+
+class MetadataBuilder {
+  public:
+    // Construct an empty logical partition table builder. The block device size
+    // and maximum metadata size must be specified, as this will determine which
+    // areas of the physical partition can be flashed for metadata vs for logical
+    // partitions.
+    //
+    // If the parameters would yield invalid metadata, nullptr is returned. This
+    // could happen if the block device size is too small to store the metadata
+    // and backup copies.
+    static std::unique_ptr<MetadataBuilder> New(uint64_t blockdevice_size,
+                                                uint32_t metadata_max_size,
+                                                uint32_t metadata_slot_count);
+
+    // Import an existing table for modification. If the table is not valid, for
+    // example it contains duplicate partition names, then nullptr is returned.
+    static std::unique_ptr<MetadataBuilder> New(const LpMetadata& metadata);
+
+    // Export metadata so it can be serialized to an image, to disk, or mounted
+    // via device-mapper.
+    std::unique_ptr<LpMetadata> Export();
+
+    // 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& guid, uint32_t attributes);
+
+    // Delete a partition by name if it exists.
+    void RemovePartition(const std::string& name);
+
+    // Find a partition by name. If no partition is found, nullptr is returned.
+    Partition* FindPartition(const std::string& name);
+
+    // Grow a partition to the requested size. If the partition's size is already
+    // greater or equal to the requested size, this will return true and the
+    // partition table will not be changed. Otherwise, a greedy algorithm is
+    // used to find free gaps in the partition table and allocate them for this
+    // partition. If not enough space can be allocated, false is returned, and
+    // the parition table will not be modified.
+    //
+    // The size will be rounded UP to the nearest sector.
+    //
+    // Note, this is an in-memory operation, and it does not alter the
+    // underlying filesystem or contents of the partition on disk.
+    bool GrowPartition(Partition* partition, uint64_t requested_size);
+
+    // Shrink a partition to the requested size. If the partition is already
+    // smaller than the given size, this will return and the partition table
+    // will not be changed. Otherwise, extents will be removed and/or shrunk
+    // from the end of the partition until it is the requested size.
+    //
+    // The size will be rounded UP to the nearest sector.
+    //
+    // Note, this is an in-memory operation, and it does not alter the
+    // underlying filesystem or contents of the partition on disk.
+    void ShrinkPartition(Partition* partition, uint64_t requested_size);
+
+  private:
+    MetadataBuilder();
+    bool Init(uint64_t blockdevice_size, uint32_t metadata_max_size, uint32_t metadata_slot_count);
+    bool Init(const LpMetadata& metadata);
+
+    LpMetadataGeometry geometry_;
+    LpMetadataHeader header_;
+    std::vector<std::unique_ptr<Partition>> partitions_;
+};
+
+}  // namespace fs_mgr
+}  // namespace android
+
+#endif /* LIBLP_METADATA_BUILDER_H */
diff --git a/fs_mgr/liblp/include/liblp/metadata_format.h b/fs_mgr/liblp/include/liblp/metadata_format.h
new file mode 100644
index 0000000..f6262ff
--- /dev/null
+++ b/fs_mgr/liblp/include/liblp/metadata_format.h
@@ -0,0 +1,263 @@
+/*
+ * 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 LOGICAL_PARTITION_METADATA_FORMAT_H_
+#define LOGICAL_PARTITION_METADATA_FORMAT_H_
+
+#ifdef __cplusplus
+#include <string>
+#include <vector>
+#endif
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Magic signature for LpMetadataGeometry. */
+#define LP_METADATA_GEOMETRY_MAGIC 0x616c4467
+
+/* Space reserved for geometry information. */
+#define LP_METADATA_GEOMETRY_SIZE 4096
+
+/* Magic signature for LpMetadataHeader. */
+#define LP_METADATA_HEADER_MAGIC 0x414C5030
+
+/* Current metadata version. */
+#define LP_METADATA_MAJOR_VERSION 1
+#define LP_METADATA_MINOR_VERSION 0
+
+/* Attributes for the LpMetadataPartition::attributes field.
+ *
+ * READONLY - The partition should not be considered writable. When used with
+ * device mapper, the block device will be created as read-only.
+ */
+#define LP_PARTITION_ATTR_READONLY 0x1
+
+/* Mask that defines all valid attributes. */
+#define LP_PARTITION_ATTRIBUTE_MASK (LP_PARTITION_ATTR_READONLY)
+
+/* Default name of the physical partition that holds logical partition entries.
+ * The layout of this partition will look like:
+ *
+ *     +--------------------+
+ *     | Disk Geometry      |
+ *     +--------------------+
+ *     | Metadata           |
+ *     +--------------------+
+ *     | Logical Partitions |
+ *     +--------------------+
+ *     | Backup Metadata    |
+ *     +--------------------+
+ *     | Geometry Backup    |
+ *     +--------------------+
+ */
+#define LP_METADATA_PARTITION_NAME "android"
+
+/* Size of a sector is always 512 bytes for compatibility with the Linux kernel. */
+#define LP_SECTOR_SIZE 512
+
+/* This structure is stored at sector 0 in the first 4096 bytes of the
+ * partition, and again in the very last 4096 bytes. It is never modified and
+ * describes how logical partition information can be located.
+ */
+typedef struct LpMetadataGeometry {
+    /*  0: Magic signature (LP_METADATA_GEOMETRY_MAGIC). */
+    uint32_t magic;
+
+    /*  4: Size of the LpMetadataGeometry struct. */
+    uint32_t struct_size;
+
+    /*  8: SHA256 checksum of this struct, with this field set to 0. */
+    uint8_t checksum[32];
+
+    /* 40: Maximum amount of space a single copy of the metadata can use. */
+    uint32_t metadata_max_size;
+
+    /* 44: Number of copies of the metadata to keep. For A/B devices, this
+     * will be 2. For an A/B/C device, it would be 3, et cetera. For Non-A/B
+     * it will be 1. A backup copy of each slot is kept, so if this is "2",
+     * there will be four copies total.
+     */
+    uint32_t metadata_slot_count;
+
+    /* 48: First usable sector for allocating logical partitions. this will be
+     * the first sector after the initial 4096 geometry block, followed by the
+     * space consumed by metadata_max_size*metadata_slot_count.
+     */
+    uint64_t first_logical_sector;
+
+    /* 56: Last usable sector, inclusive, for allocating logical partitions.
+     * At the end of this sector will follow backup metadata slots and the
+     * backup geometry block at the very end.
+     */
+    uint64_t last_logical_sector;
+} __attribute__((packed)) LpMetadataGeometry;
+
+/* The logical partition metadata has a number of tables; they are described
+ * in the header via the following structure.
+ *
+ * The size of the table can be computed by multiplying entry_size by
+ * num_entries, and the result must not overflow a 32-bit signed integer.
+ */
+typedef struct LpMetadataTableDescriptor {
+    /*  0: Location of the table, relative to the metadata header. */
+    uint32_t offset;
+    /*  4: Number of entries in the table. */
+    uint32_t num_entries;
+    /*  8: Size of each entry in the table, in bytes. */
+    uint32_t entry_size;
+} __attribute__((packed)) LpMetadataTableDescriptor;
+
+/* Binary format for the header of the logical partition metadata format.
+ *
+ * The format has three sections. The header must occur first, and the
+ * proceeding tables may be placed in any order after.
+ *
+ *  +-----------------------------------------+
+ *  | Header data - fixed size                |
+ *  +-----------------------------------------+
+ *  | Partition table - variable size         |
+ *  +-----------------------------------------+
+ *  | Partition table extents - variable size |
+ *  +-----------------------------------------+
+ *
+ * The "Header" portion is described by LpMetadataHeader. It will always
+ * precede the other three blocks.
+ *
+ * All fields are stored in little-endian byte order when serialized.
+ *
+ * This struct is versioned; see the |major_version| and |minor_version|
+ * fields.
+ */
+typedef struct LpMetadataHeader {
+    /*  0: Four bytes equal to LP_METADATA_HEADER_MAGIC. */
+    uint32_t magic;
+
+    /*  4: Version number required to read this metadata. If the version is not
+     * equal to the library version, the metadata should be considered
+     * incompatible.
+     */
+    uint16_t major_version;
+
+    /*  6: Minor version. A library supporting newer features should be able to
+     * read metadata with an older minor version. However, an older library
+     * should not support reading metadata if its minor version is higher.
+     */
+    uint16_t minor_version;
+
+    /*  8: The size of this header struct. */
+    uint32_t header_size;
+
+    /* 12: SHA256 checksum of the header, up to |header_size| bytes, computed as
+     * if this field were set to 0.
+     */
+    uint8_t header_checksum[32];
+
+    /* 44: The total size of all tables. This size is contiguous; tables may not
+     * have gaps in between, and they immediately follow the header.
+     */
+    uint32_t tables_size;
+
+    /* 48: SHA256 checksum of all table contents. */
+    uint8_t tables_checksum[32];
+
+    /* 80: Partition table descriptor. */
+    LpMetadataTableDescriptor partitions;
+    /* 92: Extent table descriptor. */
+    LpMetadataTableDescriptor extents;
+} __attribute__((packed)) LpMetadataHeader;
+
+/* This struct defines a logical partition entry, similar to what would be
+ * present in a GUID Partition Table.
+ */
+typedef struct LpMetadataPartition {
+    /*  0: Name of this partition in ASCII characters. Any unused characters in
+     * the buffer must be set to 0. Characters may only be alphanumeric or _.
+     * The name must include at least one ASCII character, and it must be unique
+     * across all partition names. The length (36) is the same as the maximum
+     * length of a GPT partition name.
+     */
+    char name[36];
+
+    /* 36: Globally unique identifier (GUID) of this partition. */
+    uint8_t guid[16];
+
+    /* 52: Attributes for the partition (see LP_PARTITION_ATTR_* flags above). */
+    uint32_t attributes;
+
+    /* 56: Index of the first extent owned by this partition. The extent will
+     * start at logical sector 0. Gaps between extents are not allowed.
+     */
+    uint32_t first_extent_index;
+
+    /* 60: Number of extents in the partition. Every partition must have at
+     * least one extent.
+     */
+    uint32_t num_extents;
+} __attribute__((packed)) LpMetadataPartition;
+
+/* This extent is a dm-linear target, and the index is an index into the
+ * LinearExtent table.
+ */
+#define LP_TARGET_TYPE_LINEAR 0
+
+/* This extent is a dm-zero target. The index is ignored and must be 0. */
+#define LP_TARGET_TYPE_ZERO 1
+
+/* This struct defines an extent entry in the extent table block. */
+typedef struct LpMetadataExtent {
+    /*  0: Length of this extent, in 512-byte sectors. */
+    uint64_t num_sectors;
+
+    /*  8: Target type for device-mapper (see LP_TARGET_TYPE_* values). */
+    uint32_t target_type;
+
+    /* 12: Contents depends on target_type.
+     *
+     * LINEAR: The sector on the physical partition that this extent maps onto.
+     * ZERO: This field must be 0.
+     */
+    uint64_t target_data;
+} __attribute__((packed)) LpMetadataExtent;
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#ifdef __cplusplus
+namespace android {
+namespace fs_mgr {
+
+// Helper structure for easily interpreting deserialized metadata, or
+// re-serializing metadata.
+struct LpMetadata {
+    LpMetadataGeometry geometry;
+    LpMetadataHeader header;
+    std::vector<LpMetadataPartition> partitions;
+    std::vector<LpMetadataExtent> extents;
+};
+
+// Helper to extract safe C++ strings from partition info.
+std::string GetPartitionName(const LpMetadataPartition& partition);
+std::string GetPartitionGuid(const LpMetadataPartition& partition);
+
+}  // namespace fs_mgr
+}  // namespace android
+#endif
+
+#endif /* LOGICAL_PARTITION_METADATA_FORMAT_H_ */
diff --git a/fs_mgr/liblp/include/liblp/reader.h b/fs_mgr/liblp/include/liblp/reader.h
new file mode 100644
index 0000000..e7fa46d
--- /dev/null
+++ b/fs_mgr/liblp/include/liblp/reader.h
@@ -0,0 +1,43 @@
+/*
+ * 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 LIBLP_READER_H_
+#define LIBLP_READER_H_
+
+#include <stddef.h>
+
+#include <memory>
+
+#include "metadata_format.h"
+
+namespace android {
+namespace fs_mgr {
+
+// Read logical partition metadata from its predetermined location on a block
+// device. If readback fails, we also attempt to load from a backup copy.
+std::unique_ptr<LpMetadata> ReadMetadata(const char* block_device, uint32_t slot_number);
+
+// Read and validate the logical partition geometry from a block device.
+bool ReadLogicalPartitionGeometry(const char* block_device, LpMetadataGeometry* geometry);
+
+// Read logical partition metadata from an image file that was created with
+// WriteToImageFile().
+std::unique_ptr<LpMetadata> ReadFromImageFile(const char* file);
+
+}  // namespace fs_mgr
+}  // namespace android
+
+#endif /* LIBLP_READER_H_ */
diff --git a/fs_mgr/liblp/include/liblp/writer.h b/fs_mgr/liblp/include/liblp/writer.h
new file mode 100644
index 0000000..02fb21f
--- /dev/null
+++ b/fs_mgr/liblp/include/liblp/writer.h
@@ -0,0 +1,53 @@
+/*
+ * 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 LIBLP_WRITER_H
+#define LIBLP_WRITER_H
+
+#include "metadata_format.h"
+
+namespace android {
+namespace fs_mgr {
+
+// When flashing the initial logical partition layout, we also write geometry
+// information at the start and end of the big physical partition. This helps
+// locate metadata and backup metadata in the case of corruption or a failed
+// update. For normal changes to the metadata, we never modify the geometry.
+enum class SyncMode {
+    // Write geometry information.
+    Flash,
+    // Normal update of a single slot.
+    Update
+};
+
+// Write the given partition table to the given block device, writing only
+// copies according to the given sync mode.
+//
+// This will perform some verification, such that the device has enough space
+// to store the metadata as well as all of its extents.
+//
+// The slot number indicates which metadata slot to use.
+bool WritePartitionTable(const char* block_device, const LpMetadata& metadata, SyncMode sync_mode,
+                         uint32_t slot_number);
+
+// Helper function to serialize geometry and metadata to a normal file, for
+// flashing or debugging.
+bool WriteToImageFile(const char* file, const LpMetadata& metadata);
+
+}  // namespace fs_mgr
+}  // namespace android
+
+#endif /* LIBLP_WRITER_H */
diff --git a/fs_mgr/liblp/reader.cpp b/fs_mgr/liblp/reader.cpp
new file mode 100644
index 0000000..1b70da9
--- /dev/null
+++ b/fs_mgr/liblp/reader.cpp
@@ -0,0 +1,307 @@
+/*
+ * 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 "liblp/reader.h"
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <functional>
+
+#include <android-base/file.h>
+#include <android-base/unique_fd.h>
+
+#include "utility.h"
+
+namespace android {
+namespace fs_mgr {
+
+// Parse an LpMetadataGeometry from a buffer. The buffer must be at least
+// LP_METADATA_GEOMETRY_SIZE bytes in size.
+static bool ParseGeometry(const void* buffer, LpMetadataGeometry* geometry) {
+    static_assert(sizeof(*geometry) <= LP_METADATA_GEOMETRY_SIZE);
+    memcpy(geometry, buffer, sizeof(*geometry));
+
+    // Check the magic signature.
+    if (geometry->magic != LP_METADATA_GEOMETRY_MAGIC) {
+        LERROR << "Logical partition metadata has invalid geometry magic signature.";
+        return false;
+    }
+    // Recompute and check the CRC32.
+    {
+        LpMetadataGeometry temp = *geometry;
+        memset(&temp.checksum, 0, sizeof(temp.checksum));
+        SHA256(&temp, sizeof(temp), temp.checksum);
+        if (memcmp(temp.checksum, geometry->checksum, sizeof(temp.checksum)) != 0) {
+            LERROR << "Logical partition metadata has invalid geometry checksum.";
+            return false;
+        }
+    }
+    // Check that the struct size is equal (this will have to change if we ever
+    // change the struct size in a release).
+    if (geometry->struct_size != sizeof(LpMetadataGeometry)) {
+        LERROR << "Logical partition metadata has invalid struct size.";
+        return false;
+    }
+    if (geometry->metadata_slot_count == 0) {
+        LERROR << "Logical partition metadata has invalid slot count.";
+        return false;
+    }
+
+    // Check that the metadata area and logical partition areas don't overlap.
+    off64_t end_of_metadata =
+            GetPrimaryMetadataOffset(*geometry, geometry->metadata_slot_count - 1) +
+            geometry->metadata_max_size;
+    if (uint64_t(end_of_metadata) > geometry->first_logical_sector * LP_SECTOR_SIZE) {
+        LERROR << "Logical partition metadata overlaps with logical partition contents.";
+        return false;
+    }
+    return true;
+}
+
+// Read and validate geometry information from a block device that holds
+// logical partitions. If the information is corrupted, this will attempt
+// to read it from a secondary backup location.
+static bool ReadLogicalPartitionGeometry(int fd, LpMetadataGeometry* geometry) {
+    // Read the first 4096 bytes.
+    std::unique_ptr<uint8_t[]> buffer = std::make_unique<uint8_t[]>(LP_METADATA_GEOMETRY_SIZE);
+    if (lseek64(fd, 0, SEEK_SET) == (off64_t)-1) {
+        PERROR << __PRETTY_FUNCTION__ << "lseek64 failed";
+        return false;
+    }
+    if (!android::base::ReadFully(fd, buffer.get(), LP_METADATA_GEOMETRY_SIZE)) {
+        PERROR << __PRETTY_FUNCTION__ << "read " << LP_METADATA_GEOMETRY_SIZE << " bytes failed";
+        return false;
+    }
+    if (ParseGeometry(buffer.get(), geometry)) {
+        return true;
+    }
+
+    // Try the backup copy in the last 4096 bytes.
+    if (lseek64(fd, -LP_METADATA_GEOMETRY_SIZE, SEEK_END) == (off64_t)-1) {
+        PERROR << __PRETTY_FUNCTION__ << "lseek64 failed, offset " << -LP_METADATA_GEOMETRY_SIZE;
+        return false;
+    }
+    if (!android::base::ReadFully(fd, buffer.get(), LP_METADATA_GEOMETRY_SIZE)) {
+        PERROR << __PRETTY_FUNCTION__ << "backup read " << LP_METADATA_GEOMETRY_SIZE
+               << " bytes failed";
+        return false;
+    }
+    return ParseGeometry(buffer.get(), geometry);
+}
+
+// Helper function to read geometry from a device without an open descriptor.
+bool ReadLogicalPartitionGeometry(const char* block_device, LpMetadataGeometry* geometry) {
+    android::base::unique_fd fd(open(block_device, O_RDONLY));
+    if (fd < 0) {
+        PERROR << __PRETTY_FUNCTION__ << "open failed: " << block_device;
+        return false;
+    }
+    return ReadLogicalPartitionGeometry(fd, geometry);
+}
+
+static bool ValidateTableBounds(const LpMetadataHeader& header,
+                                const LpMetadataTableDescriptor& table) {
+    if (table.offset > header.tables_size) {
+        return false;
+    }
+    uint64_t table_size = uint64_t(table.num_entries) * table.entry_size;
+    if (header.tables_size - table.offset < table_size) {
+        return false;
+    }
+    return true;
+}
+
+static bool ValidateMetadataHeader(const LpMetadataHeader& header) {
+    // To compute the header's checksum, we have to temporarily set its checksum
+    // field to 0.
+    {
+        LpMetadataHeader temp = header;
+        memset(&temp.header_checksum, 0, sizeof(temp.header_checksum));
+        SHA256(&temp, sizeof(temp), temp.header_checksum);
+        if (memcmp(temp.header_checksum, header.header_checksum, sizeof(temp.header_checksum)) != 0) {
+            LERROR << "Logical partition metadata has invalid checksum.";
+            return false;
+        }
+    }
+
+    // Do basic validation of key metadata bits.
+    if (header.magic != LP_METADATA_HEADER_MAGIC) {
+        LERROR << "Logical partition metadata has invalid magic value.";
+        return false;
+    }
+    // Check that the version is compatible.
+    if (header.major_version != LP_METADATA_MAJOR_VERSION ||
+        header.minor_version > LP_METADATA_MINOR_VERSION) {
+        LERROR << "Logical partition metadata has incompatible version.";
+        return false;
+    }
+    if (!ValidateTableBounds(header, header.partitions) ||
+        !ValidateTableBounds(header, header.extents)) {
+        LERROR << "Logical partition metadata has invalid table bounds.";
+        return false;
+    }
+    // Check that table entry sizes can accomodate their respective structs. If
+    // table sizes change, these checks will have to be adjusted.
+    if (header.partitions.entry_size != sizeof(LpMetadataPartition)) {
+        LERROR << "Logical partition metadata has invalid partition table entry size.";
+        return false;
+    }
+    if (header.extents.entry_size != sizeof(LpMetadataExtent)) {
+        LERROR << "Logical partition metadata has invalid extent table entry size.";
+        return false;
+    }
+    return true;
+}
+
+using ReadMetadataFn = std::function<bool(void* buffer, size_t num_bytes)>;
+
+// Parse and validate all metadata at the current position in the given file
+// descriptor.
+static std::unique_ptr<LpMetadata> ParseMetadata(int fd) {
+    // First read and validate the header.
+    std::unique_ptr<LpMetadata> metadata = std::make_unique<LpMetadata>();
+    if (!android::base::ReadFully(fd, &metadata->header, sizeof(metadata->header))) {
+        PERROR << __PRETTY_FUNCTION__ << "read " << sizeof(metadata->header) << "bytes failed";
+        return nullptr;
+    }
+    if (!ValidateMetadataHeader(metadata->header)) {
+        return nullptr;
+    }
+
+    LpMetadataHeader& header = metadata->header;
+
+    // Read the metadata payload. Allocation is fallible in case the metadata is
+    // corrupt and has some huge value.
+    std::unique_ptr<uint8_t[]> buffer(new (std::nothrow) uint8_t[header.tables_size]);
+    if (!buffer) {
+        LERROR << "Out of memory reading logical partition tables.";
+        return nullptr;
+    }
+    if (!android::base::ReadFully(fd, buffer.get(), header.tables_size)) {
+        PERROR << __PRETTY_FUNCTION__ << "read " << header.tables_size << "bytes failed";
+        return nullptr;
+    }
+
+    uint8_t checksum[32];
+    SHA256(buffer.get(), header.tables_size, checksum);
+    if (memcmp(checksum, header.tables_checksum, sizeof(checksum)) != 0) {
+        LERROR << "Logical partition metadata has invalid table checksum.";
+        return nullptr;
+    }
+
+    // ValidateTableSize ensured that |cursor| is valid for the number of
+    // entries in the table.
+    uint8_t* cursor = buffer.get() + header.partitions.offset;
+    for (size_t i = 0; i < header.partitions.num_entries; i++) {
+        LpMetadataPartition partition;
+        memcpy(&partition, cursor, sizeof(partition));
+        cursor += header.partitions.entry_size;
+
+        if (partition.attributes & ~LP_PARTITION_ATTRIBUTE_MASK) {
+            LERROR << "Logical partition has invalid attribute set.";
+            return nullptr;
+        }
+        if (partition.first_extent_index + partition.num_extents > header.extents.num_entries) {
+            LERROR << "Logical partition has invalid extent list.";
+            return nullptr;
+        }
+
+        metadata->partitions.push_back(partition);
+    }
+
+    cursor = buffer.get() + header.extents.offset;
+    for (size_t i = 0; i < header.extents.num_entries; i++) {
+        LpMetadataExtent extent;
+        memcpy(&extent, cursor, sizeof(extent));
+        cursor += header.extents.entry_size;
+
+        metadata->extents.push_back(extent);
+    }
+
+    return metadata;
+}
+
+std::unique_ptr<LpMetadata> ReadMetadata(const char* block_device, uint32_t slot_number) {
+    android::base::unique_fd fd(open(block_device, O_RDONLY));
+    if (fd < 0) {
+        PERROR << __PRETTY_FUNCTION__ << "open failed: " << block_device;
+        return nullptr;
+    }
+    LpMetadataGeometry geometry;
+    if (!ReadLogicalPartitionGeometry(fd, &geometry)) {
+        return nullptr;
+    }
+
+    // First try the primary copy.
+    off64_t offset = GetPrimaryMetadataOffset(geometry, slot_number);
+    if (lseek64(fd, offset, SEEK_SET) == (off64_t)-1) {
+        PERROR << __PRETTY_FUNCTION__ << "lseek64 failed: offset " << offset;
+        return nullptr;
+    }
+    if (std::unique_ptr<LpMetadata> metadata = ParseMetadata(fd)) {
+        return metadata;
+    }
+
+    // Next try the backup copy.
+    offset = GetBackupMetadataOffset(geometry, slot_number);
+    if (lseek64(fd, offset, SEEK_END) == (off64_t)-1) {
+        PERROR << __PRETTY_FUNCTION__ << "lseek64 failed: offset " << offset;
+        return nullptr;
+    }
+    return ParseMetadata(fd);
+}
+
+std::unique_ptr<LpMetadata> ReadFromImageFile(const char* file) {
+    android::base::unique_fd fd(open(file, O_RDONLY));
+    if (fd < 0) {
+        PERROR << __PRETTY_FUNCTION__ << "open failed: " << file;
+        return nullptr;
+    }
+
+    LpMetadataGeometry geometry;
+    if (!ReadLogicalPartitionGeometry(fd, &geometry)) {
+        return nullptr;
+    }
+    if (lseek64(fd, LP_METADATA_GEOMETRY_SIZE, SEEK_SET) == (off64_t)-1) {
+        PERROR << __PRETTY_FUNCTION__ << "lseek64 failed: offset " << LP_METADATA_GEOMETRY_SIZE;
+        return nullptr;
+    }
+    std::unique_ptr<LpMetadata> metadata = ParseMetadata(fd);
+    if (!metadata) {
+        return nullptr;
+    }
+    metadata->geometry = geometry;
+    return metadata;
+}
+
+static std::string NameFromFixedArray(const char* name, size_t buffer_size) {
+    // If the end of the buffer has a null character, it's safe to assume the
+    // buffer is null terminated. Otherwise, we cap the string to the input
+    // buffer size.
+    if (name[buffer_size - 1] == '\0') {
+        return std::string(name);
+    }
+    return std::string(name, buffer_size);
+}
+
+std::string GetPartitionName(const LpMetadataPartition& partition) {
+    return NameFromFixedArray(partition.name, sizeof(partition.name));
+}
+
+}  // namespace fs_mgr
+}  // namespace android
diff --git a/fs_mgr/liblp/utility.cpp b/fs_mgr/liblp/utility.cpp
new file mode 100644
index 0000000..c4b7028
--- /dev/null
+++ b/fs_mgr/liblp/utility.cpp
@@ -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.
+ */
+
+#include <fcntl.h>
+#include <linux/fs.h>
+#include <stdint.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <android-base/file.h>
+#include <openssl/sha.h>
+#include <uuid/uuid.h>
+
+#include "utility.h"
+
+namespace android {
+namespace fs_mgr {
+
+bool GetDescriptorSize(int fd, uint64_t* size) {
+    struct stat s;
+    if (fstat(fd, &s) < 0) {
+        PERROR << __PRETTY_FUNCTION__ << "fstat failed";
+        return false;
+    }
+
+    if (S_ISBLK(s.st_mode)) {
+        if (ioctl(fd, BLKGETSIZE64, size) != -1) {
+            return true;
+        }
+    }
+
+    off64_t result = lseek64(fd, 0, SEEK_END);
+    if (result == (off64_t)-1) {
+        PERROR << __PRETTY_FUNCTION__ << "lseek64 failed";
+        return false;
+    }
+
+    *size = result;
+    return true;
+}
+
+off64_t GetPrimaryMetadataOffset(const LpMetadataGeometry& geometry, uint32_t slot_number) {
+    CHECK(slot_number < geometry.metadata_slot_count);
+
+    off64_t offset = LP_METADATA_GEOMETRY_SIZE + geometry.metadata_max_size * slot_number;
+    CHECK(offset + geometry.metadata_max_size <=
+          off64_t(geometry.first_logical_sector * LP_SECTOR_SIZE));
+    return offset;
+}
+
+off64_t GetBackupMetadataOffset(const LpMetadataGeometry& geometry, uint32_t slot_number) {
+    CHECK(slot_number < geometry.metadata_slot_count);
+    off64_t start = off64_t(-LP_METADATA_GEOMETRY_SIZE) -
+                    off64_t(geometry.metadata_max_size) * geometry.metadata_slot_count;
+    return start + off64_t(geometry.metadata_max_size * slot_number);
+}
+
+void SHA256(const void* data, size_t length, uint8_t out[32]) {
+    SHA256_CTX c;
+    SHA256_Init(&c);
+    SHA256_Update(&c, data, length);
+    SHA256_Final(out, &c);
+}
+
+std::string GetPartitionGuid(const LpMetadataPartition& partition) {
+    // 32 hex characters, four hyphens. Unfortunately libext2_uuid provides no
+    // macro to assist with buffer sizing.
+    static const size_t kGuidLen = 36;
+    char buffer[kGuidLen + 1];
+    uuid_unparse(partition.guid, buffer);
+    return buffer;
+}
+
+}  // namespace fs_mgr
+}  // namespace android
diff --git a/fs_mgr/liblp/utility.h b/fs_mgr/liblp/utility.h
new file mode 100644
index 0000000..dc559ed
--- /dev/null
+++ b/fs_mgr/liblp/utility.h
@@ -0,0 +1,53 @@
+/*
+ * 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 LIBLP_UTILITY_H
+#define LIBLP_UTILITY_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <android-base/logging.h>
+
+#include "liblp/metadata_format.h"
+
+#define LP_TAG "[liblp]"
+#define LERROR LOG(ERROR) << LP_TAG
+#define PERROR PLOG(ERROR) << LP_TAG
+
+namespace android {
+namespace fs_mgr {
+
+// Determine the size of a block device (or file). Logs and returns false on
+// error. After calling this, the position of |fd| may have changed.
+bool GetDescriptorSize(int fd, uint64_t* size);
+
+// Return the offset of a primary metadata slot, relative to the start of the
+// device.
+off64_t GetPrimaryMetadataOffset(const LpMetadataGeometry& geometry, uint32_t slot_number);
+
+// Return the offset of a backup metadata slot, relative to the end of the
+// device.
+off64_t GetBackupMetadataOffset(const LpMetadataGeometry& geometry, uint32_t slot_number);
+
+// Compute a SHA256 hash.
+void SHA256(const void* data, size_t length, uint8_t out[32]);
+
+}  // namespace fs_mgr
+}  // namespace android
+
+#endif  // LIBLP_UTILITY_H
diff --git a/fs_mgr/liblp/writer.cpp b/fs_mgr/liblp/writer.cpp
new file mode 100644
index 0000000..aab244a
--- /dev/null
+++ b/fs_mgr/liblp/writer.cpp
@@ -0,0 +1,244 @@
+/*
+ * Copyright (C) 2007 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 <unistd.h>
+
+#include <string>
+
+#include <android-base/file.h>
+#include <android-base/unique_fd.h>
+
+#include "liblp/reader.h"
+#include "liblp/writer.h"
+#include "utility.h"
+
+namespace android {
+namespace fs_mgr {
+
+static std::string SerializeGeometry(const LpMetadataGeometry& input) {
+    LpMetadataGeometry geometry = input;
+    memset(geometry.checksum, 0, sizeof(geometry.checksum));
+    SHA256(&geometry, sizeof(geometry), geometry.checksum);
+    return std::string(reinterpret_cast<const char*>(&geometry), sizeof(geometry));
+}
+
+static bool CompareGeometry(const LpMetadataGeometry& g1, const LpMetadataGeometry& g2) {
+    return g1.metadata_max_size == g2.metadata_max_size &&
+           g1.metadata_slot_count == g2.metadata_slot_count &&
+           g1.first_logical_sector == g2.first_logical_sector &&
+           g1.last_logical_sector == g2.last_logical_sector;
+}
+
+static std::string SerializeMetadata(const LpMetadata& input) {
+    LpMetadata metadata = input;
+    LpMetadataHeader& header = metadata.header;
+
+    // Serialize individual tables.
+    std::string partitions(reinterpret_cast<const char*>(metadata.partitions.data()),
+                           metadata.partitions.size() * sizeof(LpMetadataPartition));
+    std::string extents(reinterpret_cast<const char*>(metadata.extents.data()),
+                        metadata.extents.size() * sizeof(LpMetadataExtent));
+
+    // Compute positions of tables.
+    header.partitions.offset = 0;
+    header.extents.offset = header.partitions.offset + partitions.size();
+    header.tables_size = header.extents.offset + extents.size();
+
+    // Compute payload checksum.
+    std::string tables = partitions + extents;
+    SHA256(tables.data(), tables.size(), header.tables_checksum);
+
+    // Compute header checksum.
+    memset(header.header_checksum, 0, sizeof(header.header_checksum));
+    SHA256(&header, sizeof(header), header.header_checksum);
+
+    std::string header_blob =
+            std::string(reinterpret_cast<const char*>(&metadata.header), sizeof(metadata.header));
+    return header_blob + tables;
+}
+
+// Perform sanity checks so we don't accidentally overwrite valid metadata
+// with potentially invalid metadata, or random partition data with metadata.
+static bool ValidateGeometryAndMetadata(const LpMetadata& metadata, uint64_t blockdevice_size,
+                                        uint64_t metadata_size) {
+    const LpMetadataHeader& header = metadata.header;
+    const LpMetadataGeometry& geometry = metadata.geometry;
+    // Validate the usable sector range.
+    if (geometry.first_logical_sector > geometry.last_logical_sector) {
+        LERROR << "Logical partition metadata has invalid sector range.";
+        return false;
+    }
+    // Make sure we're writing within the space reserved.
+    if (metadata_size > geometry.metadata_max_size) {
+        LERROR << "Logical partition metadata is too large.";
+        return false;
+    }
+
+    // Make sure the device has enough space to store two backup copies of the
+    // metadata.
+    uint64_t reserved_size = LP_METADATA_GEOMETRY_SIZE +
+                             uint64_t(geometry.metadata_max_size) * geometry.metadata_slot_count;
+    if (reserved_size > blockdevice_size ||
+        reserved_size > geometry.first_logical_sector * LP_SECTOR_SIZE) {
+        LERROR << "Not enough space to store all logical partition metadata slots.";
+        return false;
+    }
+    if (blockdevice_size - reserved_size < (geometry.last_logical_sector + 1) * LP_SECTOR_SIZE) {
+        LERROR << "Not enough space to backup all logical partition metadata slots.";
+        return false;
+    }
+
+    // Make sure all partition entries reference valid extents.
+    for (const auto& partition : metadata.partitions) {
+        if (partition.first_extent_index + partition.num_extents > metadata.extents.size()) {
+            LERROR << "Partition references invalid extent.";
+            return false;
+        }
+    }
+
+    // Make sure all linear extents have a valid range.
+    for (const auto& extent : metadata.extents) {
+        if (extent.target_type == LP_TARGET_TYPE_LINEAR) {
+            uint64_t physical_sector = extent.target_data;
+            if (physical_sector < geometry.first_logical_sector ||
+                physical_sector + extent.num_sectors > geometry.last_logical_sector) {
+                LERROR << "Extent table entry is out of bounds.";
+                return false;
+            }
+        }
+    }
+    return true;
+}
+
+bool WritePartitionTable(const char* block_device, const LpMetadata& metadata, SyncMode sync_mode,
+                         uint32_t slot_number) {
+    android::base::unique_fd fd(open(block_device, O_RDWR | O_SYNC));
+    if (fd < 0) {
+        PERROR << __PRETTY_FUNCTION__ << "open failed: " << block_device;
+        return false;
+    }
+
+    uint64_t size;
+    if (!GetDescriptorSize(fd, &size)) {
+        return false;
+    }
+
+    const LpMetadataGeometry& geometry = metadata.geometry;
+    if (sync_mode != SyncMode::Flash) {
+        // Verify that the old geometry is identical. If it's not, then we've
+        // based this new metadata on invalid assumptions.
+        LpMetadataGeometry old_geometry;
+        if (!ReadLogicalPartitionGeometry(block_device, &old_geometry)) {
+            return false;
+        }
+        if (!CompareGeometry(geometry, old_geometry)) {
+            LERROR << "Incompatible geometry in new logical partition metadata";
+            return false;
+        }
+    }
+
+    // Make sure we're writing to a valid metadata slot.
+    if (slot_number >= geometry.metadata_slot_count) {
+        LERROR << "Invalid logical partition metadata slot number.";
+        return false;
+    }
+
+    // Before writing geometry and/or logical partition tables, perform some
+    // basic checks that the geometry and tables are coherent, and will fit
+    // on the given block device.
+    std::string blob = SerializeMetadata(metadata);
+    if (!ValidateGeometryAndMetadata(metadata, size, blob.size())) {
+        return false;
+    }
+
+    // First write geometry if this is a flash operation. It gets written to
+    // the first and last 4096-byte regions of the device.
+    if (sync_mode == SyncMode::Flash) {
+        std::string blob = SerializeGeometry(metadata.geometry);
+        if (lseek64(fd, 0, SEEK_SET) == (off64_t)-1) {
+            PERROR << __PRETTY_FUNCTION__ << "lseek64 failed: offset 0";
+            return false;
+        }
+        if (!android::base::WriteFully(fd, blob.data(), blob.size())) {
+            PERROR << __PRETTY_FUNCTION__ << "write " << blob.size()
+                   << " bytes failed: " << block_device;
+            return false;
+        }
+        if (lseek64(fd, -LP_METADATA_GEOMETRY_SIZE, SEEK_END) == (off64_t)-1) {
+            PERROR << __PRETTY_FUNCTION__ << "lseek64 failed: offset " << -LP_METADATA_GEOMETRY_SIZE;
+            return false;
+        }
+        if (!android::base::WriteFully(fd, blob.data(), blob.size())) {
+            PERROR << __PRETTY_FUNCTION__ << "backup write " << blob.size()
+                   << " bytes failed: " << block_device;
+            return false;
+        }
+    }
+
+    // Write the primary copy of the metadata.
+    off64_t primary_offset = GetPrimaryMetadataOffset(geometry, slot_number);
+    if (lseek64(fd, primary_offset, SEEK_SET) == (off64_t)-1) {
+        PERROR << __PRETTY_FUNCTION__ << "lseek64 failed: offset " << primary_offset;
+        return false;
+    }
+    if (!android::base::WriteFully(fd, blob.data(), blob.size())) {
+        PERROR << __PRETTY_FUNCTION__ << "write " << blob.size()
+               << " bytes failed: " << block_device;
+        return false;
+    }
+
+    // Write the backup copy of the metadata.
+    off64_t backup_offset = GetBackupMetadataOffset(geometry, slot_number);
+    off64_t abs_offset = lseek64(fd, backup_offset, SEEK_END);
+    if (abs_offset == (off64_t)-1) {
+        PERROR << __PRETTY_FUNCTION__ << "lseek64 failed: offset " << backup_offset;
+        return false;
+    }
+    if (abs_offset < off64_t((geometry.last_logical_sector + 1) * LP_SECTOR_SIZE)) {
+        PERROR << __PRETTY_FUNCTION__ << "backup offset " << abs_offset
+               << " is within logical partition bounds, sector " << geometry.last_logical_sector;
+        return false;
+    }
+    if (!android::base::WriteFully(fd, blob.data(), blob.size())) {
+        PERROR << __PRETTY_FUNCTION__ << "backup write " << blob.size()
+               << " bytes failed: " << block_device;
+        return false;
+    }
+    return true;
+}
+
+bool WriteToImageFile(const char* file, const LpMetadata& input) {
+    std::string geometry = SerializeGeometry(input.geometry);
+    std::string padding(LP_METADATA_GEOMETRY_SIZE - geometry.size(), '\0');
+    std::string metadata = SerializeMetadata(input);
+
+    std::string everything = geometry + padding + metadata;
+
+    android::base::unique_fd fd(open(file, O_CREAT | O_RDWR | O_TRUNC, 0644));
+    if (fd < 0) {
+        PERROR << __PRETTY_FUNCTION__ << "open failed: " << file;
+        return false;
+    }
+    if (!android::base::WriteFully(fd, everything.data(), everything.size())) {
+        PERROR << __PRETTY_FUNCTION__ << "write " << everything.size() << " bytes failed: " << file;
+        return false;
+    }
+    return true;
+}
+
+}  // namespace fs_mgr
+}  // namespace android
diff --git a/fs_mgr/tests/Android.bp b/fs_mgr/tests/Android.bp
new file mode 100644
index 0000000..5497223
--- /dev/null
+++ b/fs_mgr/tests/Android.bp
@@ -0,0 +1,36 @@
+// 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: "fs_mgr_unit_test",
+
+    shared_libs: [
+        "libbase",
+        "liblog",
+    ],
+    static_libs: [
+        "libfs_mgr",
+        "libfstab",
+    ],
+
+    srcs: [
+        "fs_mgr_test.cpp",
+    ],
+
+    cflags: [
+        "-Wall",
+        "-Wextra",
+        "-Werror",
+    ],
+}
diff --git a/fs_mgr/tests/fs_mgr_test.cpp b/fs_mgr/tests/fs_mgr_test.cpp
new file mode 100644
index 0000000..2e76752
--- /dev/null
+++ b/fs_mgr/tests/fs_mgr_test.cpp
@@ -0,0 +1,131 @@
+/*
+ * 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 <algorithm>
+#include <iterator>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include <android-base/strings.h>
+#include <gtest/gtest.h>
+
+#include "../fs_mgr_priv_boot_config.h"
+
+namespace {
+
+const std::string cmdline =
+        "rcupdate.rcu_expedited=1 rootwait ro "
+        "init=/init androidboot.bootdevice=1d84000.ufshc "
+        "androidboot.baseband=sdy androidboot.keymaster=1  skip_initramfs "
+        "androidboot.serialno=BLAHBLAHBLAH androidboot.slot_suffix=_a "
+        "androidboot.hardware.platform=sdw813 androidboot.hardware=foo "
+        "androidboot.revision=EVT1.0 androidboot.bootloader=burp-0.1-7521 "
+        "androidboot.hardware.sku=mary androidboot.hardware.radio.subtype=0 "
+        "androidboot.dtbo_idx=2 androidboot.mode=normal "
+        "androidboot.hardware.ddr=1GB,combuchi,LPDDR4X "
+        "androidboot.ddr_info=combuchiandroidboot.ddr_size=2GB "
+        "androidboot.hardware.ufs=2GB,combushi "
+        "androidboot.boottime=0BLE:58,1BLL:22,1BLE:571,2BLL:105,ODT:0,AVB:123 "
+        "androidboot.ramdump=disabled "
+        "dm=\"1 vroot none ro 1,0 10416 verity 1 624684 fec_start 624684\" "
+        "root=/dev/dm-0 "
+        "androidboot.vbmeta.device=PARTUUID=aa08f1a4-c7c9-402e-9a66-9707cafa9ceb "
+        "androidboot.vbmeta.avb_version=\"1.1\" "
+        "androidboot.vbmeta.device_state=unlocked "
+        "androidboot.vbmeta.hash_alg=sha256 androidboot.vbmeta.size=5248 "
+        "androidboot.vbmeta.digest="
+        "ac13147e959861c20f2a6da97d25fe79e60e902c022a371c5c039d31e7c68860 "
+        "androidboot.vbmeta.invalidate_on_error=yes "
+        "androidboot.veritymode=enforcing androidboot.verifiedbootstate=orange "
+        "androidboot.space=\"sha256 5248 androidboot.nospace=nope\" "
+        "printk.devkmsg=on msm_rtb.filter=0x237 ehci-hcd.park=3 "
+        "\"string =\"\"string '\" "
+        "service_locator.enable=1 firmware_class.path=/vendor/firmware "
+        "cgroup.memory=nokmem lpm_levels.sleep_disabled=1 "
+        "buildvariant=userdebug  console=null "
+        "terminator=\"truncated";
+
+const std::vector<std::pair<std::string, std::string>> result_space = {
+        {"rcupdate.rcu_expedited", "1"},
+        {"rootwait", ""},
+        {"ro", ""},
+        {"init", "/init"},
+        {"androidboot.bootdevice", "1d84000.ufshc"},
+        {"androidboot.baseband", "sdy"},
+        {"androidboot.keymaster", "1"},
+        {"skip_initramfs", ""},
+        {"androidboot.serialno", "BLAHBLAHBLAH"},
+        {"androidboot.slot_suffix", "_a"},
+        {"androidboot.hardware.platform", "sdw813"},
+        {"androidboot.hardware", "foo"},
+        {"androidboot.revision", "EVT1.0"},
+        {"androidboot.bootloader", "burp-0.1-7521"},
+        {"androidboot.hardware.sku", "mary"},
+        {"androidboot.hardware.radio.subtype", "0"},
+        {"androidboot.dtbo_idx", "2"},
+        {"androidboot.mode", "normal"},
+        {"androidboot.hardware.ddr", "1GB,combuchi,LPDDR4X"},
+        {"androidboot.ddr_info", "combuchiandroidboot.ddr_size=2GB"},
+        {"androidboot.hardware.ufs", "2GB,combushi"},
+        {"androidboot.boottime", "0BLE:58,1BLL:22,1BLE:571,2BLL:105,ODT:0,AVB:123"},
+        {"androidboot.ramdump", "disabled"},
+        {"dm", "1 vroot none ro 1,0 10416 verity 1 624684 fec_start 624684"},
+        {"root", "/dev/dm-0"},
+        {"androidboot.vbmeta.device", "PARTUUID=aa08f1a4-c7c9-402e-9a66-9707cafa9ceb"},
+        {"androidboot.vbmeta.avb_version", "1.1"},
+        {"androidboot.vbmeta.device_state", "unlocked"},
+        {"androidboot.vbmeta.hash_alg", "sha256"},
+        {"androidboot.vbmeta.size", "5248"},
+        {"androidboot.vbmeta.digest",
+         "ac13147e959861c20f2a6da97d25fe79e60e902c022a371c5c039d31e7c68860"},
+        {"androidboot.vbmeta.invalidate_on_error", "yes"},
+        {"androidboot.veritymode", "enforcing"},
+        {"androidboot.verifiedbootstate", "orange"},
+        {"androidboot.space", "sha256 5248 androidboot.nospace=nope"},
+        {"printk.devkmsg", "on"},
+        {"msm_rtb.filter", "0x237"},
+        {"ehci-hcd.park", "3"},
+        {"string ", "string '"},
+        {"service_locator.enable", "1"},
+        {"firmware_class.path", "/vendor/firmware"},
+        {"cgroup.memory", "nokmem"},
+        {"lpm_levels.sleep_disabled", "1"},
+        {"buildvariant", "userdebug"},
+        {"console", "null"},
+        {"terminator", "truncated"},
+};
+
+}  // namespace
+
+TEST(fs_mgr, fs_mgr_parse_boot_config) {
+    EXPECT_EQ(result_space, fs_mgr_parse_boot_config(cmdline));
+}
+
+TEST(fs_mgr, fs_mgr_get_boot_config_from_kernel_cmdline) {
+    std::string content;
+    for (const auto& entry : result_space) {
+        static constexpr char androidboot[] = "androidboot.";
+        if (!android::base::StartsWith(entry.first, androidboot)) continue;
+        auto key = entry.first.substr(strlen(androidboot));
+        EXPECT_TRUE(fs_mgr_get_boot_config_from_kernel(cmdline, key, &content)) << " for " << key;
+        EXPECT_EQ(entry.second, content);
+    }
+    EXPECT_FALSE(fs_mgr_get_boot_config_from_kernel(cmdline, "vbmeta.avb_versio", &content));
+    EXPECT_TRUE(content.empty()) << content;
+    EXPECT_FALSE(fs_mgr_get_boot_config_from_kernel(cmdline, "nospace", &content));
+    EXPECT_TRUE(content.empty()) << content;
+}
diff --git a/fs_mgr/tools/Android.bp b/fs_mgr/tools/Android.bp
new file mode 100644
index 0000000..4d4aae4
--- /dev/null
+++ b/fs_mgr/tools/Android.bp
@@ -0,0 +1,31 @@
+//
+// 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: "dmctl",
+    srcs: ["dmctl.cpp"],
+
+    static_libs: [
+        "libfs_mgr",
+    ],
+
+    shared_libs: [
+        "libbase",
+        "liblog",
+    ],
+
+    cflags: ["-Werror"],
+}
diff --git a/fs_mgr/tools/dmctl.cpp b/fs_mgr/tools/dmctl.cpp
new file mode 100644
index 0000000..b40b83a
--- /dev/null
+++ b/fs_mgr/tools/dmctl.cpp
@@ -0,0 +1,174 @@
+/*
+ * 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 <getopt.h>
+#include <linux/dm-ioctl.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <android-base/unique_fd.h>
+#include <dm.h>
+
+#include <functional>
+#include <iomanip>
+#include <ios>
+#include <iostream>
+#include <map>
+#include <string>
+#include <vector>
+
+using DeviceMapper = ::android::dm::DeviceMapper;
+using DmTarget = ::android::dm::DmTarget;
+using DmBlockDevice = ::android::dm::DeviceMapper::DmBlockDevice;
+
+static int Usage(void) {
+    std::cerr << "usage: dmctl <command> [command options]" << std::endl;
+    std::cerr << "commands:" << std::endl;
+    std::cerr << "  create <dm-name> [<dm-target> [-lo <filename>] <dm-target-args>]" << std::endl;
+    std::cerr << "  delete <dm-name>" << std::endl;
+    std::cerr << "  list <devices | targets>" << std::endl;
+    std::cerr << "  help" << std::endl;
+    return -EINVAL;
+}
+
+static int DmCreateCmdHandler(int argc, char** argv) {
+    if (argc < 1) {
+        std::cerr << "DmCreateCmdHandler: atleast 'name' MUST be provided for target device";
+        return -EINVAL;
+    }
+
+    std::string name = argv[0];
+    DeviceMapper& dm = DeviceMapper::Instance();
+    if (!dm.CreateDevice(name)) {
+        std::cerr << "DmCreateCmdHandler: Failed to create " << name << " device";
+        return -EIO;
+    }
+
+    // if we also have target specified
+    if (argc > 1) {
+        // fall through for now. This will eventually create a DmTarget() based on the target name
+        // passing it the table that is specified at the command line
+    }
+
+    return 0;
+}
+
+static int DmDeleteCmdHandler(int argc, char** argv) {
+    if (argc < 1) {
+        std::cerr << "DmCreateCmdHandler: atleast 'name' MUST be provided for target device";
+        return -EINVAL;
+    }
+
+    std::string name = argv[0];
+    DeviceMapper& dm = DeviceMapper::Instance();
+    if (!dm.DeleteDevice(name)) {
+        std::cerr << "DmCreateCmdHandler: Failed to create " << name << " device";
+        return -EIO;
+    }
+
+    return 0;
+}
+
+static int DmListTargets(DeviceMapper& dm) {
+    std::vector<DmTarget> targets;
+    if (!dm.GetAvailableTargets(&targets)) {
+        std::cerr << "Failed to read available device mapper targets" << std::endl;
+        return -errno;
+    }
+
+    std::cout << "Available Device Mapper Targets:" << std::endl;
+    if (targets.empty()) {
+        std::cout << "  <empty>" << std::endl;
+        return 0;
+    }
+
+    for (const auto& target : targets) {
+        std::cout << std::left << std::setw(20) << target.name() << " : " << target.version()
+                  << std::endl;
+    }
+
+    return 0;
+}
+
+static int DmListDevices(DeviceMapper& dm) {
+    std::vector<DmBlockDevice> devices;
+    if (!dm.GetAvailableDevices(&devices)) {
+        std::cerr << "Failed to read available device mapper devices" << std::endl;
+        return -errno;
+    }
+    std::cout << "Available Device Mapper Devices:" << std::endl;
+    if (devices.empty()) {
+        std::cout << "  <empty>" << std::endl;
+        return 0;
+    }
+
+    for (const auto& dev : devices) {
+        std::cout << std::left << std::setw(20) << dev.name() << " : " << dev.Major() << ":"
+                  << dev.Minor() << std::endl;
+    }
+
+    return 0;
+}
+
+static const std::map<std::string, std::function<int(DeviceMapper&)>> listmap = {
+        {"targets", DmListTargets},
+        {"devices", DmListDevices},
+};
+
+static int DmListCmdHandler(int argc, char** argv) {
+    if (argc < 1) {
+        std::cerr << "Invalid arguments, see \'dmctl help\'" << std::endl;
+        return -EINVAL;
+    }
+
+    DeviceMapper& dm = DeviceMapper::Instance();
+    for (const auto& l : listmap) {
+        if (l.first == argv[0]) return l.second(dm);
+    }
+
+    std::cerr << "Invalid argument to \'dmctl list\': " << argv[0] << std::endl;
+    return -EINVAL;
+}
+
+static int HelpCmdHandler(int /* argc */, char** /* argv */) {
+    Usage();
+    return 0;
+}
+
+static std::map<std::string, std::function<int(int, char**)>> cmdmap = {
+        {"create", DmCreateCmdHandler},
+        {"delete", DmDeleteCmdHandler},
+        {"list", DmListCmdHandler},
+        {"help", HelpCmdHandler},
+};
+
+int main(int argc, char** argv) {
+    android::base::InitLogging(argv, &android::base::StderrLogger);
+    if (argc < 2) {
+        return Usage();
+    }
+
+    for (const auto& cmd : cmdmap) {
+        if (cmd.first == argv[1]) {
+            return cmd.second(argc - 2, argv + 2);
+        }
+    }
+
+    return Usage();
+}
diff --git a/healthd/Android.mk b/healthd/Android.mk
index 818488d..86f7cf0 100644
--- a/healthd/Android.mk
+++ b/healthd/Android.mk
@@ -74,9 +74,6 @@
 ifeq ($(strip $(BOARD_CHARGER_NO_UI)),true)
 LOCAL_CHARGER_NO_UI := true
 endif
-ifdef BRILLO
-LOCAL_CHARGER_NO_UI := true
-endif
 
 LOCAL_SRC_FILES := \
     charger.cpp \
diff --git a/healthd/OWNERS b/healthd/OWNERS
index 2375f7c..00df08a 100644
--- a/healthd/OWNERS
+++ b/healthd/OWNERS
@@ -1 +1,2 @@
+elsk@google.com
 toddpoynor@google.com
diff --git a/init/Android.bp b/init/Android.bp
index 70a4ac6..7d863c8 100644
--- a/init/Android.bp
+++ b/init/Android.bp
@@ -67,24 +67,26 @@
         "libsquashfs_utils",
         "liblogwrap",
         "libext4_utils",
-        "libcutils",
-        "libbase",
-        "libc",
         "libseccomp_policy",
-        "libselinux",
-        "liblog",
         "libcrypto_utils",
-        "libcrypto",
-        "libc++_static",
-        "libdl",
         "libsparse",
-        "libz",
         "libprocessgroup",
         "libavb",
         "libkeyutils",
         "libprotobuf-cpp-lite",
         "libpropertyinfoserializer",
         "libpropertyinfoparser",
+        "libselinux",
+    ],
+    shared_libs: [
+        "libcutils",
+        "libbase",
+        "libc",
+        "liblog",
+        "libcrypto",
+        "libc++",
+        "libdl",
+        "libz",
     ],
 }
 
@@ -100,6 +102,7 @@
         "capabilities.cpp",
         "descriptors.cpp",
         "devices.cpp",
+        "epoll.cpp",
         "firmware_handler.cpp",
         "import_parser.cpp",
         "init.cpp",
@@ -165,10 +168,10 @@
 cc_test {
     name: "init_tests",
     defaults: ["init_defaults"],
-    static_executable: true,
     srcs: [
         "devices_test.cpp",
         "init_test.cpp",
+        "keychords_test.cpp",
         "persistent_properties_test.cpp",
         "property_service_test.cpp",
         "property_type_test.cpp",
@@ -180,11 +183,11 @@
         "util_test.cpp",
     ],
     static_libs: ["libinit"],
+    test_suites: ["device-tests"],
 }
 
 cc_benchmark {
     name: "init_benchmarks",
-    static_executable: true,
     defaults: ["init_defaults"],
     srcs: [
         "subcontext_benchmark.cpp",
@@ -230,8 +233,11 @@
         "action_parser.cpp",
         "capabilities.cpp",
         "descriptors.cpp",
+        "epoll.cpp",
+        "keychords.cpp",
         "import_parser.cpp",
-        "host_init_parser.cpp",
+        "host_import_parser.cpp",
+        "host_init_verifier.cpp",
         "host_init_stubs.cpp",
         "parser.cpp",
         "rlimit_parser.cpp",
@@ -244,7 +250,10 @@
     proto: {
         type: "lite",
     },
-    generated_headers: ["generated_stub_builtin_function_map"],
+    generated_headers: [
+        "generated_stub_builtin_function_map",
+        "generated_android_ids"
+    ],
     target: {
         android: {
             enabled: false,
diff --git a/init/Android.mk b/init/Android.mk
index c4a6a50..da27a73 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -45,7 +45,6 @@
 
 LOCAL_MODULE:= init
 
-LOCAL_FORCE_STATIC_EXECUTABLE := true
 LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT)
 LOCAL_UNSTRIPPED_PATH := $(TARGET_ROOT_OUT_UNSTRIPPED)
 
@@ -59,18 +58,10 @@
     libsquashfs_utils \
     liblogwrap \
     libext4_utils \
-    libcutils \
-    libbase \
-    libc \
     libseccomp_policy \
-    libselinux \
-    liblog \
     libcrypto_utils \
-    libcrypto \
-    libc++_static \
-    libdl \
     libsparse \
-    libz \
+    libselinux \
     libprocessgroup \
     libavb \
     libkeyutils \
@@ -78,6 +69,25 @@
     libpropertyinfoserializer \
     libpropertyinfoparser \
 
+shared_libs := \
+    libcutils \
+    libbase \
+    liblog \
+    libcrypto \
+    libdl \
+    libz \
+
+ifneq ($(BOARD_BUILD_SYSTEM_ROOT_IMAGE),true)
+# init is static executable for non-system-as-root devices, because the dynamic linker
+# and shared libs are not available before /system is mounted, but init has to run
+# before the partition is mounted.
+LOCAL_STATIC_LIBRARIES += $(shared_libs) libc++_static
+LOCAL_FORCE_STATIC_EXECUTABLE := true
+else
+LOCAL_SHARED_LIBRARIES := $(shared_libs) libc++
+endif
+shared_libs :=
+
 LOCAL_REQUIRED_MODULES := \
     e2fsdroid \
     mke2fs \
diff --git a/init/README.md b/init/README.md
index 9099427..550ef05 100644
--- a/init/README.md
+++ b/init/README.md
@@ -161,6 +161,25 @@
 Options are modifiers to services.  They affect how and when init
 runs the service.
 
+`capabilities <capability> [ <capability>\* ]`
+> Set capabilities when exec'ing this service. 'capability' should be a Linux
+  capability without the "CAP\_" prefix, like "NET\_ADMIN" or "SETPCAP". See
+  http://man7.org/linux/man-pages/man7/capabilities.7.html for a list of Linux
+  capabilities.
+
+`class <name> [ <name>\* ]`
+> Specify class names for the service.  All services in a
+  named class may be started or stopped together.  A service
+  is in the class "default" if one is not specified via the
+  class option. Additional classnames beyond the (required) first
+  one are used to group services.
+  The `animation` class should include all services necessary for both
+  boot animation and shutdown animation. As these services can be
+  launched very early during bootup and can run until the last stage
+  of shutdown, access to /data partition is not guaranteed. These
+  services can check files under /data but it should not keep files opened
+  and should work when /data is not available.
+
 `console [<console>]`
 > This service needs a console. The optional second parameter chooses a
   specific console instead of the default. The default "/dev/console" can
@@ -174,18 +193,7 @@
 
 `disabled`
 > This service will not automatically start with its class.
-  It must be explicitly started by name.
-
-`setenv <name> <value>`
-> Set the environment variable _name_ to _value_ in the launched process.
-
-`socket <name> <type> <perm> [ <user> [ <group> [ <seclabel> ] ] ]`
-> Create a unix domain socket named /dev/socket/_name_ and pass its fd to the
-  launched process.  _type_ must be "dgram", "stream" or "seqpacket".  User and
-  group default to 0.  'seclabel' is the SELinux security context for the
-  socket.  It defaults to the service security context, as specified by
-  seclabel or computed based on the service executable file security context.
-  For native executables see libcutils android\_get\_control\_socket().
+  It must be explicitly started by name or by interface name.
 
 `enter_namespace <type> <path>`
 > Enters the namespace of type _type_ located at _path_. Only network namespaces are supported with
@@ -196,6 +204,100 @@
   "r", "w" or "rw".  For native executables see libcutils
   android\_get\_control\_file().
 
+`group <groupname> [ <groupname>\* ]`
+> Change to 'groupname' before exec'ing this service.  Additional
+  groupnames beyond the (required) first one are used to set the
+  supplemental groups of the process (via setgroups()).
+  Currently defaults to root.  (??? probably should default to nobody)
+
+`interface <interface name> <instance name>`
+> Associates this service with a list of the HIDL services that it provides. The interface name
+  must be a fully-qualified name and not a value name. This is used to allow hwservicemanager to
+  lazily start services.
+  For example: interface vendor.foo.bar@1.0::IBaz default
+
+`ioprio <class> <priority>`
+> Sets the IO priority and IO priority class for this service via the SYS_ioprio_set syscall.
+  _class_ must be one of "rt", "be", or "idle". _priority_ must be an integer in the range 0 - 7.
+
+`keycodes <keycode> [ <keycode>\* ]`
+> Sets the keycodes that will trigger this service. If all of the keys corresponding to the passed
+  keycodes are pressed at once, the service will start. This is typically used to start the
+  bugreport service.
+
+`memcg.limit_in_bytes <value>`
+> Sets the child's memory.limit_in_bytes to the specified value (only if memcg is mounted),
+  which must be equal or greater than 0.
+
+`memcg.soft_limit_in_bytes <value>`
+> Sets the child's memory.soft_limit_in_bytes to the specified value (only if memcg is mounted),
+  which must be equal or greater than 0.
+
+`memcg.swappiness <value>`
+> Sets the child's memory.swappiness to the specified value (only if memcg is mounted),
+  which must be equal or greater than 0.
+
+`namespace <pid|mnt>`
+> Enter a new PID or mount namespace when forking the service.
+
+`oneshot`
+> Do not restart the service when it exits.
+
+`onrestart`
+> Execute a Command (see below) when service restarts.
+
+`oom_score_adjust <value>`
+> Sets the child's /proc/self/oom\_score\_adj to the specified value,
+  which must range from -1000 to 1000.
+
+`override`
+> Indicates that this service definition is meant to override a previous definition for a service
+  with the same name. This is typically meant for services on /odm to override those defined on
+  /vendor. The last service definition that init parses with this keyword is the service definition
+  will use for this service. Pay close attention to the order in which init.rc files are parsed,
+  since it has some peculiarities for backwards compatibility reasons. The 'imports' section of
+  this file has more details on the order.
+
+`priority <priority>`
+> 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().
+
+`rlimit <resource> <cur> <max>`
+> This applies the given rlimit to the service. rlimits are inherited by child
+  processes, so this effectively applies the given rlimit to the process tree
+  started by this service.
+  It is parsed similarly to the setrlimit command specified below.
+
+`seclabel <seclabel>`
+> Change to 'seclabel' before exec'ing this service.
+  Primarily for use by services run from the rootfs, e.g. ueventd, adbd.
+  Services on the system partition can instead use policy-defined transitions
+  based on their file security context.
+  If not specified and no transition is defined in policy, defaults to the init context.
+
+`setenv <name> <value>`
+> Set the environment variable _name_ to _value_ in the launched process.
+
+`shutdown <shutdown_behavior>`
+> Set shutdown behavior of the service process. When this is not specified,
+  the service is killed during shutdown process by using SIGTERM and SIGKILL.
+  The service with shutdown_behavior of "critical" is not killed during shutdown
+  until shutdown times out. When shutdown times out, even services tagged with
+  "shutdown critical" will be killed. When the service tagged with "shutdown critical"
+  is not running when shut down starts, it will be started.
+
+`sigstop`
+> Send SIGSTOP to the service immediately before exec is called. This is intended for debugging.
+  See the below section on debugging for how this can be used.
+
+`socket <name> <type> <perm> [ <user> [ <group> [ <seclabel> ] ] ]`
+> Create a unix domain socket named /dev/socket/_name_ and pass its fd to the
+  launched process.  _type_ must be "dgram", "stream" or "seqpacket".  User and
+  group default to 0.  'seclabel' is the SELinux security context for the
+  socket.  It defaults to the service security context, as specified by
+  seclabel or computed based on the service executable file security context.
+  For native executables see libcutils android\_get\_control\_socket().
+
 `user <username>`
 > Change to 'username' before exec'ing this service.
   Currently defaults to root.  (??? probably should default to nobody)
@@ -212,88 +314,12 @@
   As of Android O, processes can also request capabilities directly in their .rc
   files. See the "capabilities" option below.
 
-`group <groupname> [ <groupname>\* ]`
-> Change to 'groupname' before exec'ing this service.  Additional
-  groupnames beyond the (required) first one are used to set the
-  supplemental groups of the process (via setgroups()).
-  Currently defaults to root.  (??? probably should default to nobody)
-
-`capabilities <capability> [ <capability>\* ]`
-> Set capabilities when exec'ing this service. 'capability' should be a Linux
-  capability without the "CAP\_" prefix, like "NET\_ADMIN" or "SETPCAP". See
-  http://man7.org/linux/man-pages/man7/capabilities.7.html for a list of Linux
-  capabilities.
-
-`setrlimit <resource> <cur> <max>`
-> This applies the given rlimit to the service. rlimits are inherited by child
-  processes, so this effectively applies the given rlimit to the process tree
-  started by this service.
-  It is parsed similarly to the setrlimit command specified below.
-
-`seclabel <seclabel>`
-> Change to 'seclabel' before exec'ing this service.
-  Primarily for use by services run from the rootfs, e.g. ueventd, adbd.
-  Services on the system partition can instead use policy-defined transitions
-  based on their file security context.
-  If not specified and no transition is defined in policy, defaults to the init context.
-
-`oneshot`
-> Do not restart the service when it exits.
-
-`class <name> [ <name>\* ]`
-> Specify class names for the service.  All services in a
-  named class may be started or stopped together.  A service
-  is in the class "default" if one is not specified via the
-  class option. Additional classnames beyond the (required) first
-  one are used to group services.
-`animation class`
-> 'animation' class should include all services necessary for both
-  boot animation and shutdown animation. As these services can be
-  launched very early during bootup and can run until the last stage
-  of shutdown, access to /data partition is not guaranteed. These
-  services can check files under /data but it should not keep files opened
-  and should work when /data is not available.
-
-`onrestart`
-> Execute a Command (see below) when service restarts.
-
 `writepid <file> [ <file>\* ]`
 > Write the child's pid to the given files when it forks. Meant for
   cgroup/cpuset usage. If no files under /dev/cpuset/ are specified, but the
   system property 'ro.cpuset.default' is set to a non-empty cpuset name (e.g.
   '/foreground'), then the pid is written to file /dev/cpuset/_cpuset\_name_/tasks.
 
-`priority <priority>`
-> 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().
-
-`namespace <pid|mnt>`
-> Enter a new PID or mount namespace when forking the service.
-
-`oom_score_adjust <value>`
-> Sets the child's /proc/self/oom\_score\_adj to the specified value,
-  which must range from -1000 to 1000.
-
-`memcg.swappiness <value>`
-> Sets the child's memory.swappiness to the specified value (only if memcg is mounted),
-  which must be equal or greater than 0.
-
-`memcg.soft_limit_in_bytes <value>`
-> Sets the child's memory.soft_limit_in_bytes to the specified value (only if memcg is mounted),
-  which must be equal or greater than 0.
-
-`memcg.limit_in_bytes <value>`
-> Sets the child's memory.limit_in_bytes to the specified value (only if memcg is mounted),
-  which must be equal or greater than 0.
-
-`shutdown <shutdown_behavior>`
-> Set shutdown behavior of the service process. When this is not specified,
-  the service is killed during shutdown process by using SIGTERM and SIGKILL.
-  The service with shutdown_behavior of "critical" is not killed during shutdown
-  until shutdown times out. When shutdown times out, even services tagged with
-  "shutdown critical" will be killed. When the service tagged with "shutdown critical"
-  is not running when shut down starts, it will be started.
-
 
 Triggers
 --------
@@ -690,23 +716,39 @@
 
 Debugging init
 --------------
-By default, programs executed by init will drop stdout and stderr into
-/dev/null. To help with debugging, you can execute your program via the
-Android program logwrapper. This will redirect stdout/stderr into the
-Android logging system (accessed via logcat).
+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.
 
-For example
-service akmd /system/bin/logwrapper /sbin/akmd
+If it is required to debug a service from its very start, the `sigstop` service option is added.
+This option will send SIGSTOP to a service immediately before calling exec. This gives a window
+where developers can attach a debugger, strace, etc before continuing the service with SIGCONT.
 
-For quicker turnaround when working on init itself, use:
+This flag can also be dynamically controled via the ctl.sigstop_on and ctl.sigstop_off properties.
 
-    mm -j &&
-    m ramdisk-nodeps &&
-    m bootimage-nodeps &&
-    adb reboot bootloader &&
-    fastboot boot $ANDROID_PRODUCT_OUT/boot.img
+Below is an example of dynamically debugging logd via the above:
 
-Alternatively, use the emulator:
+    stop logd
+    setprop ctl.sigstop_on logd
+    start logd
+    ps -e | grep logd
+    > logd          4343     1   18156   1684 do_signal_stop 538280 T init
+    gdbclient.py -p 4343
+    b main
+    c
+    c
+    c
+    > Breakpoint 1, main (argc=1, argv=0x7ff8c9a488) at system/core/logd/main.cpp:427
 
-    emulator -partition-size 1024 \
-        -verbose -show-kernel -no-window
+Below is an example of doing the same but with strace
+
+    stop logd
+    setprop ctl.sigstop_on logd
+    start logd
+    ps -e | grep logd
+    > logd          4343     1   18156   1684 do_signal_stop 538280 T init
+    strace -p 4343
+
+    (From a different shell)
+    kill -SIGCONT 4343
+
+    > strace runs
diff --git a/init/action.cpp b/init/action.cpp
index f782b51..11335ca 100644
--- a/init/action.cpp
+++ b/init/action.cpp
@@ -18,16 +18,11 @@
 
 #include <android-base/chrono_utils.h>
 #include <android-base/logging.h>
+#include <android-base/properties.h>
 #include <android-base/strings.h>
 
 #include "util.h"
 
-#if defined(__ANDROID__)
-#include <android-base/properties.h>
-#else
-#include "host_init_stubs.h"
-#endif
-
 using android::base::Join;
 
 namespace android {
diff --git a/init/action_parser.cpp b/init/action_parser.cpp
index a2c9671..8a4b518 100644
--- a/init/action_parser.cpp
+++ b/init/action_parser.cpp
@@ -16,16 +16,11 @@
 
 #include "action_parser.h"
 
+#include <android-base/properties.h>
 #include <android-base/strings.h>
 
 #include "stable_properties.h"
 
-#if defined(__ANDROID__)
-#include <android-base/properties.h>
-#else
-#include "host_init_stubs.h"
-#endif
-
 using android::base::GetBoolProperty;
 using android::base::StartsWith;
 
diff --git a/init/bootchart.cpp b/init/bootchart.cpp
index 379b4fa..c2cf573 100644
--- a/init/bootchart.cpp
+++ b/init/bootchart.cpp
@@ -32,12 +32,14 @@
 #include <mutex>
 #include <thread>
 
+#include <android-base/chrono_utils.h>
 #include <android-base/file.h>
 #include <android-base/logging.h>
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 
 using android::base::StringPrintf;
+using android::base::boot_clock;
 using namespace std::chrono_literals;
 
 namespace android {
@@ -50,9 +52,9 @@
 static bool g_bootcharting_finished;
 
 static long long get_uptime_jiffies() {
-  std::string uptime;
-  if (!android::base::ReadFileToString("/proc/uptime", &uptime)) return 0;
-  return 100LL * strtod(uptime.c_str(), NULL);
+    constexpr int64_t kNanosecondsPerJiffy = 10000000;
+    boot_clock::time_point uptime = boot_clock::now();
+    return uptime.time_since_epoch().count() / kNanosecondsPerJiffy;
 }
 
 static std::unique_ptr<FILE, decltype(&fclose)> fopen_unique(const char* filename,
diff --git a/init/builtins.cpp b/init/builtins.cpp
index 8bd92cc..17d34e1 100644
--- a/init/builtins.cpp
+++ b/init/builtins.cpp
@@ -240,6 +240,29 @@
     return Success();
 }
 
+static Result<Success> do_interface_restart(const BuiltinArguments& args) {
+    Service* svc = ServiceList::GetInstance().FindInterface(args[1]);
+    if (!svc) return Error() << "interface " << args[1] << " not found";
+    svc->Restart();
+    return Success();
+}
+
+static Result<Success> do_interface_start(const BuiltinArguments& args) {
+    Service* svc = ServiceList::GetInstance().FindInterface(args[1]);
+    if (!svc) return Error() << "interface " << args[1] << " not found";
+    if (auto result = svc->Start(); !result) {
+        return Error() << "Could not start interface: " << result.error();
+    }
+    return Success();
+}
+
+static Result<Success> do_interface_stop(const BuiltinArguments& args) {
+    Service* svc = ServiceList::GetInstance().FindInterface(args[1]);
+    if (!svc) return Error() << "interface " << args[1] << " not found";
+    svc->Stop();
+    return Success();
+}
+
 // mkdir <path> [mode] [owner] [group]
 static Result<Success> do_mkdir(const BuiltinArguments& args) {
     mode_t mode = 0755;
@@ -1050,6 +1073,9 @@
         {"init_user0",              {0,     0,    {false,  do_init_user0}}},
         {"insmod",                  {1,     kMax, {true,   do_insmod}}},
         {"installkey",              {1,     1,    {false,  do_installkey}}},
+        {"interface_restart",       {1,     1,    {false,  do_interface_restart}}},
+        {"interface_start",         {1,     1,    {false,  do_interface_start}}},
+        {"interface_stop",          {1,     1,    {false,  do_interface_stop}}},
         {"load_persist_props",      {0,     0,    {false,  do_load_persist_props}}},
         {"load_system_props",       {0,     0,    {false,  do_load_system_props}}},
         {"loglevel",                {1,     1,    {false,  do_loglevel}}},
diff --git a/init/epoll.cpp b/init/epoll.cpp
new file mode 100644
index 0000000..4bca09e
--- /dev/null
+++ b/init/epoll.cpp
@@ -0,0 +1,84 @@
+/*
+ * 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 "epoll.h"
+
+#include <sys/epoll.h>
+
+#include <chrono>
+#include <functional>
+#include <map>
+
+namespace android {
+namespace init {
+
+Epoll::Epoll() {}
+
+Result<Success> Epoll::Open() {
+    if (epoll_fd_ >= 0) return Success();
+    epoll_fd_.reset(epoll_create1(EPOLL_CLOEXEC));
+
+    if (epoll_fd_ == -1) {
+        return ErrnoError() << "epoll_create1 failed";
+    }
+    return Success();
+}
+
+Result<Success> Epoll::RegisterHandler(int fd, std::function<void()> handler) {
+    auto [it, inserted] = epoll_handlers_.emplace(fd, std::move(handler));
+    if (!inserted) {
+        return Error() << "Cannot specify two epoll handlers for a given FD";
+    }
+    epoll_event ev;
+    ev.events = EPOLLIN;
+    // std::map's iterators do not get invalidated until erased, so we use the
+    // pointer to the std::function in the map directly for epoll_ctl.
+    ev.data.ptr = reinterpret_cast<void*>(&it->second);
+    if (epoll_ctl(epoll_fd_, EPOLL_CTL_ADD, fd, &ev) == -1) {
+        Result<Success> result = ErrnoError() << "epoll_ctl failed to add fd";
+        epoll_handlers_.erase(fd);
+        return result;
+    }
+    return Success();
+}
+
+Result<Success> Epoll::UnregisterHandler(int fd) {
+    if (epoll_ctl(epoll_fd_, EPOLL_CTL_DEL, fd, nullptr) == -1) {
+        return ErrnoError() << "epoll_ctl failed to remove fd";
+    }
+    if (epoll_handlers_.erase(fd) != 1) {
+        return Error() << "Attempting to remove epoll handler for FD without an existing handler";
+    }
+    return Success();
+}
+
+Result<Success> 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) {
+        return ErrnoError() << "epoll_wait failed";
+    } else if (nr == 1) {
+        std::invoke(*reinterpret_cast<std::function<void()>*>(ev.data.ptr));
+    }
+    return Success();
+}
+
+}  // namespace init
+}  // namespace android
diff --git a/init/epoll.h b/init/epoll.h
new file mode 100644
index 0000000..85a791c
--- /dev/null
+++ b/init/epoll.h
@@ -0,0 +1,49 @@
+/*
+ * 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 _INIT_EPOLL_H
+#define _INIT_EPOLL_H
+
+#include <chrono>
+#include <functional>
+#include <map>
+#include <optional>
+
+#include <android-base/unique_fd.h>
+
+#include "result.h"
+
+namespace android {
+namespace init {
+
+class Epoll {
+  public:
+    Epoll();
+
+    Result<Success> Open();
+    Result<Success> RegisterHandler(int fd, std::function<void()> handler);
+    Result<Success> UnregisterHandler(int fd);
+    Result<Success> Wait(std::optional<std::chrono::milliseconds> timeout);
+
+  private:
+    android::base::unique_fd epoll_fd_;
+    std::map<int, std::function<void()>> epoll_handlers_;
+};
+
+}  // namespace init
+}  // namespace android
+
+#endif
diff --git a/init/host_import_parser.cpp b/init/host_import_parser.cpp
new file mode 100644
index 0000000..93e363f
--- /dev/null
+++ b/init/host_import_parser.cpp
@@ -0,0 +1,40 @@
+/*
+ * 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 "host_import_parser.h"
+
+#include <android-base/strings.h>
+
+using android::base::StartsWith;
+
+namespace android {
+namespace init {
+
+Result<Success> HostImportParser::ParseSection(std::vector<std::string>&& args, const std::string&,
+                                               int) {
+    if (args.size() != 2) {
+        return Error() << "single argument needed for import\n";
+    }
+
+    return Success();
+}
+
+Result<Success> HostImportParser::ParseLineSection(std::vector<std::string>&&, int) {
+    return Error() << "Unexpected line found after import statement";
+}
+
+}  // namespace init
+}  // namespace android
diff --git a/init/host_import_parser.h b/init/host_import_parser.h
new file mode 100644
index 0000000..52b8891
--- /dev/null
+++ b/init/host_import_parser.h
@@ -0,0 +1,35 @@
+/*
+ * 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 <vector>
+
+#include "parser.h"
+
+namespace android {
+namespace init {
+
+class HostImportParser : public SectionParser {
+  public:
+    HostImportParser() {}
+    Result<Success> ParseSection(std::vector<std::string>&& args, const std::string&, int) override;
+    Result<Success> ParseLineSection(std::vector<std::string>&&, int) override;
+};
+
+}  // namespace init
+}  // namespace android
diff --git a/init/host_init_parser.cpp b/init/host_init_parser.cpp
deleted file mode 100644
index 5232b7e..0000000
--- a/init/host_init_parser.cpp
+++ /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.
-//
-
-#include <pwd.h>
-
-#include <android-base/logging.h>
-
-#include "action.h"
-#include "action_manager.h"
-#include "action_parser.h"
-#include "parser.h"
-#include "result.h"
-#include "service.h"
-
-// The host passwd file won't have the Android entries, so we fake success here.
-passwd* getpwnam(const char* login) {  // NOLINT: implementing bad function.
-    char dummy_buf[] = "dummy";
-    static passwd dummy_passwd = {
-        .pw_name = dummy_buf,
-        .pw_dir = dummy_buf,
-        .pw_shell = dummy_buf,
-        .pw_uid = 123,
-        .pw_gid = 123,
-    };
-    return &dummy_passwd;
-}
-
-namespace android {
-namespace init {
-
-static Result<Success> do_stub(const BuiltinArguments& args) {
-    return Success();
-}
-
-#include "generated_stub_builtin_function_map.h"
-
-int main(int argc, char** argv) {
-    android::base::InitLogging(argv, &android::base::StderrLogger);
-    if (argc != 2) {
-        LOG(ERROR) << "Usage: " << argv[0] << " <init file to parse>";
-        return -1;
-    }
-    const BuiltinFunctionMap function_map;
-    Action::set_function_map(&function_map);
-    ActionManager& am = ActionManager::GetInstance();
-    ServiceList& sl = ServiceList::GetInstance();
-    Parser parser;
-    parser.AddSectionParser("service", std::make_unique<ServiceParser>(&sl, nullptr));
-    parser.AddSectionParser("on", std::make_unique<ActionParser>(&am, nullptr));
-
-    size_t num_errors = 0;
-    if (!parser.ParseConfig(argv[1], &num_errors)) {
-        LOG(ERROR) << "Failed to find script";
-        return -1;
-    }
-    if (num_errors > 0) {
-        LOG(ERROR) << "Parse failed with " << num_errors << " errors";
-        return -1;
-    }
-    LOG(INFO) << "Parse success!";
-    return 0;
-}
-
-}  // namespace init
-}  // namespace android
-
-int main(int argc, char** argv) {
-    android::init::main(argc, argv);
-}
diff --git a/init/host_init_stubs.cpp b/init/host_init_stubs.cpp
index 4451ac8..2352fc7 100644
--- a/init/host_init_stubs.cpp
+++ b/init/host_init_stubs.cpp
@@ -16,33 +16,25 @@
 
 #include "host_init_stubs.h"
 
+#include <android-base/properties.h>
+
 // unistd.h
 int setgroups(size_t __size, const gid_t* __list) {
     return 0;
 }
 
 namespace android {
-namespace base {
-
-std::string GetProperty(const std::string&, const std::string& default_value) {
-    return default_value;
-}
-
-bool GetBoolProperty(const std::string&, bool default_value) {
-    return default_value;
-}
-
-}  // namespace base
-}  // namespace android
-
-namespace android {
 namespace init {
 
 // init.h
 std::string default_console = "/dev/console";
 
 // property_service.h
-uint32_t (*property_set)(const std::string& name, const std::string& value) = nullptr;
+uint32_t SetProperty(const std::string& key, const std::string& value) {
+    android::base::SetProperty(key, value);
+    return 0;
+}
+uint32_t (*property_set)(const std::string& name, const std::string& value) = SetProperty;
 uint32_t HandlePropertySet(const std::string&, const std::string&, const std::string&, const ucred&,
                            std::string*) {
     return 0;
diff --git a/init/host_init_stubs.h b/init/host_init_stubs.h
index ad48602..f0e1f07 100644
--- a/init/host_init_stubs.h
+++ b/init/host_init_stubs.h
@@ -29,21 +29,6 @@
 // unistd.h
 int setgroups(size_t __size, const gid_t* __list);
 
-// android-base/properties.h
-namespace android {
-namespace base {
-
-std::string GetProperty(const std::string& key, const std::string& default_value);
-bool GetBoolProperty(const std::string& key, bool default_value);
-template <typename T>
-T GetIntProperty(const std::string&, T default_value, T = std::numeric_limits<T>::min(),
-                 T = std::numeric_limits<T>::max()) {
-    return default_value;
-}
-
-}  // namespace base
-}  // namespace android
-
 namespace android {
 namespace init {
 
diff --git a/init/host_init_verifier.cpp b/init/host_init_verifier.cpp
new file mode 100644
index 0000000..7e93b44
--- /dev/null
+++ b/init/host_init_verifier.cpp
@@ -0,0 +1,166 @@
+//
+// 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 <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/parseint.h>
+#include <android-base/strings.h>
+
+#include "action.h"
+#include "action_manager.h"
+#include "action_parser.h"
+#include "host_import_parser.h"
+#include "host_init_stubs.h"
+#include "parser.h"
+#include "result.h"
+#include "service.h"
+
+#define EXCLUDE_FS_CONFIG_STRUCTURES
+#include "generated_android_ids.h"
+
+using namespace std::literals;
+
+using android::base::ParseInt;
+using android::base::ReadFileToString;
+using android::base::Split;
+
+static std::string passwd_file;
+
+static std::vector<std::pair<std::string, int>> GetVendorPasswd() {
+    std::string passwd;
+    if (!ReadFileToString(passwd_file, &passwd)) {
+        return {};
+    }
+
+    std::vector<std::pair<std::string, int>> result;
+    auto passwd_lines = Split(passwd, "\n");
+    for (const auto& line : passwd_lines) {
+        auto split_line = Split(line, ":");
+        if (split_line.size() < 3) {
+            continue;
+        }
+        int uid = 0;
+        if (!ParseInt(split_line[2], &uid)) {
+            continue;
+        }
+        result.emplace_back(split_line[0], uid);
+    }
+    return result;
+}
+
+passwd* getpwnam(const char* login) {  // NOLINT: implementing bad function.
+    // This isn't thread safe, but that's okay for our purposes.
+    static char static_name[32] = "";
+    static char static_dir[32] = "/";
+    static char static_shell[32] = "/system/bin/sh";
+    static passwd static_passwd = {
+        .pw_name = static_name,
+        .pw_dir = static_dir,
+        .pw_shell = static_shell,
+        .pw_uid = 0,
+        .pw_gid = 0,
+    };
+
+    for (size_t n = 0; n < android_id_count; ++n) {
+        if (!strcmp(android_ids[n].name, login)) {
+            snprintf(static_name, sizeof(static_name), "%s", android_ids[n].name);
+            static_passwd.pw_uid = android_ids[n].aid;
+            static_passwd.pw_gid = android_ids[n].aid;
+            return &static_passwd;
+        }
+    }
+
+    static const auto vendor_passwd = GetVendorPasswd();
+
+    for (const auto& [name, uid] : vendor_passwd) {
+        if (name == login) {
+            snprintf(static_name, sizeof(static_name), "%s", name.c_str());
+            static_passwd.pw_uid = uid;
+            static_passwd.pw_gid = uid;
+            return &static_passwd;
+        }
+    }
+
+    unsigned int oem_uid;
+    if (sscanf(login, "oem_%u", &oem_uid) == 1) {
+        snprintf(static_name, sizeof(static_name), "%s", login);
+        static_passwd.pw_uid = oem_uid;
+        static_passwd.pw_gid = oem_uid;
+        return &static_passwd;
+    }
+
+    errno = ENOENT;
+    return nullptr;
+}
+
+namespace android {
+namespace init {
+
+static Result<Success> do_stub(const BuiltinArguments& args) {
+    return Success();
+}
+
+#include "generated_stub_builtin_function_map.h"
+
+int main(int argc, char** argv) {
+    android::base::InitLogging(argv, &android::base::StdioLogger);
+    android::base::SetMinimumLogSeverity(android::base::ERROR);
+
+    if (argc != 2 && argc != 3) {
+        LOG(ERROR) << "Usage: " << argv[0] << " <init rc file> [passwd file]";
+        return EXIT_FAILURE;
+    }
+
+    if (argc == 3) {
+        passwd_file = argv[2];
+    }
+
+    const BuiltinFunctionMap function_map;
+    Action::set_function_map(&function_map);
+    ActionManager& am = ActionManager::GetInstance();
+    ServiceList& sl = ServiceList::GetInstance();
+    Parser parser;
+    parser.AddSectionParser("service", std::make_unique<ServiceParser>(&sl, nullptr));
+    parser.AddSectionParser("on", std::make_unique<ActionParser>(&am, nullptr));
+    parser.AddSectionParser("import", std::make_unique<HostImportParser>());
+
+    if (!parser.ParseConfig(argv[1])) {
+        LOG(ERROR) << "Failed to open init rc script '" << argv[1] << "'";
+        return EXIT_FAILURE;
+    }
+    if (parser.parse_error_count() > 0) {
+        LOG(ERROR) << "Failed to parse init script '" << argv[1] << "' with "
+                   << parser.parse_error_count() << " errors";
+        return EXIT_FAILURE;
+    }
+    return EXIT_SUCCESS;
+}
+
+}  // namespace init
+}  // namespace android
+
+int main(int argc, char** argv) {
+    return android::init::main(argc, argv);
+}
diff --git a/init/import_parser.cpp b/init/import_parser.cpp
index e335fd1..fb3185e 100644
--- a/init/import_parser.cpp
+++ b/init/import_parser.cpp
@@ -41,14 +41,15 @@
     return Success();
 }
 
+Result<Success> ImportParser::ParseLineSection(std::vector<std::string>&&, int) {
+    return Error() << "Unexpected line found after import statement";
+}
+
 void ImportParser::EndFile() {
     auto current_imports = std::move(imports_);
     imports_.clear();
     for (const auto& [import, line_num] : current_imports) {
-        if (!parser_->ParseConfig(import)) {
-            PLOG(ERROR) << filename_ << ": " << line_num << ": Could not import file '" << import
-                        << "'";
-        }
+        parser_->ParseConfig(import);
     }
 }
 
diff --git a/init/import_parser.h b/init/import_parser.h
index 5a2f894..7bc72e6 100644
--- a/init/import_parser.h
+++ b/init/import_parser.h
@@ -30,6 +30,7 @@
     ImportParser(Parser* parser) : parser_(parser) {}
     Result<Success> ParseSection(std::vector<std::string>&& args, const std::string& filename,
                                  int line) override;
+    Result<Success> ParseLineSection(std::vector<std::string>&&, int) override;
     void EndFile() override;
 
   private:
diff --git a/init/init.cpp b/init/init.cpp
index 4fe115e..b494bcc 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -24,13 +24,16 @@
 #include <signal.h>
 #include <stdlib.h>
 #include <string.h>
-#include <sys/epoll.h>
 #include <sys/mount.h>
 #include <sys/signalfd.h>
 #include <sys/sysmacros.h>
 #include <sys/types.h>
 #include <unistd.h>
 
+#include <map>
+#include <memory>
+#include <optional>
+
 #include <android-base/chrono_utils.h>
 #include <android-base/file.h>
 #include <android-base/logging.h>
@@ -43,10 +46,8 @@
 #include <private/android_filesystem_config.h>
 #include <selinux/android.h>
 
-#include <memory>
-#include <optional>
-
 #include "action_parser.h"
+#include "epoll.h"
 #include "import_parser.h"
 #include "init_first_stage.h"
 #include "keychords.h"
@@ -60,6 +61,7 @@
 #include "util.h"
 #include "watchdogd.h"
 
+using namespace std::chrono_literals;
 using namespace std::string_literals;
 
 using android::base::boot_clock;
@@ -78,8 +80,7 @@
 
 std::string default_console = "/dev/console";
 
-static int epoll_fd = -1;
-static int sigterm_signal_fd = -1;
+static int signal_fd = -1;
 
 static std::unique_ptr<Timer> waiting_for_prop(nullptr);
 static std::string wait_prop_name;
@@ -130,15 +131,6 @@
     }
 }
 
-void register_epoll_handler(int fd, void (*fn)()) {
-    epoll_event ev;
-    ev.events = EPOLLIN;
-    ev.data.ptr = reinterpret_cast<void*>(fn);
-    if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fd, &ev) == -1) {
-        PLOG(ERROR) << "epoll_ctl failed";
-    }
-}
-
 bool start_waiting_for_property(const char *name, const char *value)
 {
     if (waiting_for_prop) {
@@ -238,6 +230,10 @@
 static const std::map<std::string, ControlMessageFunction>& get_control_message_map() {
     // clang-format off
     static const std::map<std::string, ControlMessageFunction> control_message_functions = {
+        {"sigstop_on",        {ControlTarget::SERVICE,
+                               [](auto* service) { service->set_sigstop(true); return Success(); }}},
+        {"sigstop_off",       {ControlTarget::SERVICE,
+                               [](auto* service) { service->set_sigstop(false); return Success(); }}},
         {"start",             {ControlTarget::SERVICE,   DoControlStart}},
         {"stop",              {ControlTarget::SERVICE,   DoControlStop}},
         {"restart",           {ControlTarget::SERVICE,   DoControlRestart}},
@@ -273,40 +269,29 @@
 
     const ControlMessageFunction& function = it->second;
 
-    if (function.target == ControlTarget::SERVICE) {
-        Service* svc = ServiceList::GetInstance().FindService(name);
-        if (svc == nullptr) {
-            LOG(ERROR) << "No such service '" << name << "' for ctl." << msg;
-            return;
-        }
-        if (auto result = function.action(svc); !result) {
-            LOG(ERROR) << "Could not ctl." << msg << " for service " << name << ": "
-                       << result.error();
-        }
+    Service* svc = nullptr;
 
+    switch (function.target) {
+        case ControlTarget::SERVICE:
+            svc = ServiceList::GetInstance().FindService(name);
+            break;
+        case ControlTarget::INTERFACE:
+            svc = ServiceList::GetInstance().FindInterface(name);
+            break;
+        default:
+            LOG(ERROR) << "Invalid function target from static map key '" << msg << "': "
+                       << static_cast<std::underlying_type<ControlTarget>::type>(function.target);
+            return;
+    }
+
+    if (svc == nullptr) {
+        LOG(ERROR) << "Could not find '" << name << "' for ctl." << msg;
         return;
     }
 
-    if (function.target == ControlTarget::INTERFACE) {
-        for (const auto& svc : ServiceList::GetInstance()) {
-            if (svc->interfaces().count(name) == 0) {
-                continue;
-            }
-
-            if (auto result = function.action(svc.get()); !result) {
-                LOG(ERROR) << "Could not handle ctl." << msg << " for service " << svc->name()
-                           << " with interface " << name << ": " << result.error();
-            }
-
-            return;
-        }
-
-        LOG(ERROR) << "Could not find service hosting interface " << name;
-        return;
+    if (auto result = function.action(svc); !result) {
+        LOG(ERROR) << "Could not ctl." << msg << " for '" << name << "': " << result.error();
     }
-
-    LOG(ERROR) << "Invalid function target from static map key '" << msg
-               << "': " << static_cast<std::underlying_type<ControlTarget>::type>(function.target);
 }
 
 static Result<Success> wait_for_coldboot_done_action(const BuiltinArguments& args) {
@@ -330,11 +315,6 @@
     return Success();
 }
 
-static Result<Success> keychord_init_action(const BuiltinArguments& args) {
-    keychord_init();
-    return Success();
-}
-
 static Result<Success> console_init_action(const BuiltinArguments& args) {
     std::string console = GetProperty("ro.boot.console", "");
     if (!console.empty()) {
@@ -492,14 +472,7 @@
     sigaction(SIGTRAP, &action, nullptr);
 }
 
-static void HandleSigtermSignal() {
-    signalfd_siginfo siginfo;
-    ssize_t bytes_read = TEMP_FAILURE_RETRY(read(sigterm_signal_fd, &siginfo, sizeof(siginfo)));
-    if (bytes_read != sizeof(siginfo)) {
-        PLOG(ERROR) << "Failed to read siginfo from sigterm_signal_fd";
-        return;
-    }
-
+static void HandleSigtermSignal(const signalfd_siginfo& siginfo) {
     if (siginfo.ssi_pid != 0) {
         // Drop any userspace SIGTERM requests.
         LOG(DEBUG) << "Ignoring SIGTERM from pid " << siginfo.ssi_pid;
@@ -509,37 +482,102 @@
     HandlePowerctlMessage("shutdown,container");
 }
 
-static void UnblockSigterm() {
-    sigset_t mask;
-    sigemptyset(&mask);
-    sigaddset(&mask, SIGTERM);
+static void HandleSignalFd() {
+    signalfd_siginfo siginfo;
+    ssize_t bytes_read = TEMP_FAILURE_RETRY(read(signal_fd, &siginfo, sizeof(siginfo)));
+    if (bytes_read != sizeof(siginfo)) {
+        PLOG(ERROR) << "Failed to read siginfo from signal_fd";
+        return;
+    }
 
-    if (sigprocmask(SIG_UNBLOCK, &mask, nullptr) == -1) {
-        PLOG(FATAL) << "failed to unblock SIGTERM for PID " << getpid();
+    switch (siginfo.ssi_signo) {
+        case SIGCHLD:
+            ReapAnyOutstandingChildren();
+            break;
+        case SIGTERM:
+            HandleSigtermSignal(siginfo);
+            break;
+        default:
+            PLOG(ERROR) << "signal_fd: received unexpected signal " << siginfo.ssi_signo;
+            break;
     }
 }
 
-static void InstallSigtermHandler() {
+static void UnblockSignals() {
+    const struct sigaction act { .sa_handler = SIG_DFL };
+    sigaction(SIGCHLD, &act, nullptr);
+
     sigset_t mask;
     sigemptyset(&mask);
+    sigaddset(&mask, SIGCHLD);
     sigaddset(&mask, SIGTERM);
 
-    if (sigprocmask(SIG_BLOCK, &mask, nullptr) == -1) {
-        PLOG(FATAL) << "failed to block SIGTERM";
+    if (sigprocmask(SIG_UNBLOCK, &mask, nullptr) == -1) {
+        PLOG(FATAL) << "failed to unblock signals for PID " << getpid();
+    }
+}
+
+static void InstallSignalFdHandler(Epoll* epoll) {
+    // Applying SA_NOCLDSTOP to a defaulted SIGCHLD handler prevents the signalfd from receiving
+    // SIGCHLD when a child process stops or continues (b/77867680#comment9).
+    const struct sigaction act { .sa_handler = SIG_DFL, .sa_flags = SA_NOCLDSTOP };
+    sigaction(SIGCHLD, &act, nullptr);
+
+    sigset_t mask;
+    sigemptyset(&mask);
+    sigaddset(&mask, SIGCHLD);
+
+    if (!IsRebootCapable()) {
+        // If init does not have the CAP_SYS_BOOT capability, it is running in a container.
+        // In that case, receiving SIGTERM will cause the system to shut down.
+        sigaddset(&mask, SIGTERM);
     }
 
-    // Register a handler to unblock SIGTERM in the child processes.
-    const int result = pthread_atfork(nullptr, nullptr, &UnblockSigterm);
+    if (sigprocmask(SIG_BLOCK, &mask, nullptr) == -1) {
+        PLOG(FATAL) << "failed to block signals";
+    }
+
+    // Register a handler to unblock signals in the child processes.
+    const int result = pthread_atfork(nullptr, nullptr, &UnblockSignals);
     if (result != 0) {
         LOG(FATAL) << "Failed to register a fork handler: " << strerror(result);
     }
 
-    sigterm_signal_fd = signalfd(-1, &mask, SFD_CLOEXEC);
-    if (sigterm_signal_fd == -1) {
-        PLOG(FATAL) << "failed to create signalfd for SIGTERM";
+    signal_fd = signalfd(-1, &mask, SFD_CLOEXEC);
+    if (signal_fd == -1) {
+        PLOG(FATAL) << "failed to create signalfd";
     }
 
-    register_epoll_handler(sigterm_signal_fd, HandleSigtermSignal);
+    if (auto result = epoll->RegisterHandler(signal_fd, HandleSignalFd); !result) {
+        LOG(FATAL) << result.error();
+    }
+}
+
+void HandleKeychord(const std::vector<int>& keycodes) {
+    // Only handle keychords if adb is enabled.
+    std::string adb_enabled = android::base::GetProperty("init.svc.adbd", "");
+    if (adb_enabled != "running") {
+        LOG(WARNING) << "Not starting service for keychord " << android::base::Join(keycodes, ' ')
+                     << " because ADB is disabled";
+        return;
+    }
+
+    auto found = false;
+    for (const auto& service : ServiceList::GetInstance()) {
+        auto svc = service.get();
+        if (svc->keycodes() == keycodes) {
+            found = true;
+            LOG(INFO) << "Starting service '" << svc->name() << "' from keychord "
+                      << android::base::Join(keycodes, ' ');
+            if (auto result = svc->Start(); !result) {
+                LOG(ERROR) << "Could not start service '" << svc->name() << "' from keychord "
+                           << android::base::Join(keycodes, ' ') << ": " << result.error();
+            }
+        }
+    }
+    if (!found) {
+        LOG(ERROR) << "Service for keychord " << android::base::Join(keycodes, ' ') << " not found";
+    }
 }
 
 int main(int argc, char** argv) {
@@ -566,47 +604,61 @@
     if (is_first_stage) {
         boot_clock::time_point start_time = boot_clock::now();
 
+        std::vector<std::pair<std::string, int>> errors;
+#define CHECKCALL(x) \
+    if (x != 0) errors.emplace_back(#x " failed", errno);
+
         // Clear the umask.
         umask(0);
 
-        clearenv();
-        setenv("PATH", _PATH_DEFPATH, 1);
+        CHECKCALL(clearenv());
+        CHECKCALL(setenv("PATH", _PATH_DEFPATH, 1));
         // Get the basic filesystem setup we need put together in the initramdisk
         // on / and then we'll let the rc file figure out the rest.
-        mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755");
-        mkdir("/dev/pts", 0755);
-        mkdir("/dev/socket", 0755);
-        mount("devpts", "/dev/pts", "devpts", 0, NULL);
-        #define MAKE_STR(x) __STRING(x)
-        mount("proc", "/proc", "proc", 0, "hidepid=2,gid=" MAKE_STR(AID_READPROC));
+        CHECKCALL(mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755"));
+        CHECKCALL(mkdir("/dev/pts", 0755));
+        CHECKCALL(mkdir("/dev/socket", 0755));
+        CHECKCALL(mount("devpts", "/dev/pts", "devpts", 0, NULL));
+#define MAKE_STR(x) __STRING(x)
+        CHECKCALL(mount("proc", "/proc", "proc", 0, "hidepid=2,gid=" MAKE_STR(AID_READPROC)));
+#undef MAKE_STR
         // Don't expose the raw commandline to unprivileged processes.
-        chmod("/proc/cmdline", 0440);
+        CHECKCALL(chmod("/proc/cmdline", 0440));
         gid_t groups[] = { AID_READPROC };
-        setgroups(arraysize(groups), groups);
-        mount("sysfs", "/sys", "sysfs", 0, NULL);
-        mount("selinuxfs", "/sys/fs/selinux", "selinuxfs", 0, NULL);
+        CHECKCALL(setgroups(arraysize(groups), groups));
+        CHECKCALL(mount("sysfs", "/sys", "sysfs", 0, NULL));
+        CHECKCALL(mount("selinuxfs", "/sys/fs/selinux", "selinuxfs", 0, NULL));
 
-        mknod("/dev/kmsg", S_IFCHR | 0600, makedev(1, 11));
+        CHECKCALL(mknod("/dev/kmsg", S_IFCHR | 0600, makedev(1, 11)));
 
         if constexpr (WORLD_WRITABLE_KMSG) {
-            mknod("/dev/kmsg_debug", S_IFCHR | 0622, makedev(1, 11));
+            CHECKCALL(mknod("/dev/kmsg_debug", S_IFCHR | 0622, makedev(1, 11)));
         }
 
-        mknod("/dev/random", S_IFCHR | 0666, makedev(1, 8));
-        mknod("/dev/urandom", S_IFCHR | 0666, makedev(1, 9));
+        CHECKCALL(mknod("/dev/random", S_IFCHR | 0666, makedev(1, 8)));
+        CHECKCALL(mknod("/dev/urandom", S_IFCHR | 0666, makedev(1, 9)));
 
         // Mount staging areas for devices managed by vold
         // See storage config details at http://source.android.com/devices/storage/
-        mount("tmpfs", "/mnt", "tmpfs", MS_NOEXEC | MS_NOSUID | MS_NODEV,
-              "mode=0755,uid=0,gid=1000");
+        CHECKCALL(mount("tmpfs", "/mnt", "tmpfs", MS_NOEXEC | MS_NOSUID | MS_NODEV,
+                        "mode=0755,uid=0,gid=1000"));
         // /mnt/vendor is used to mount vendor-specific partitions that can not be
         // part of the vendor partition, e.g. because they are mounted read-write.
-        mkdir("/mnt/vendor", 0755);
+        CHECKCALL(mkdir("/mnt/vendor", 0755));
+
+#undef CHECKCALL
 
         // Now that tmpfs is mounted on /dev and we have /dev/kmsg, we can actually
         // talk to the outside world...
         InitKernelLogging(argv);
 
+        if (!errors.empty()) {
+            for (const auto& [error_string, error_errno] : errors) {
+                LOG(ERROR) << error_string << " " << strerror(error_errno);
+            }
+            LOG(FATAL) << "Init encountered errors starting first stage, aborting";
+        }
+
         LOG(INFO) << "init first stage started!";
 
         if (!DoFirstStageMount()) {
@@ -685,22 +737,16 @@
     SelabelInitialize();
     SelinuxRestoreContext();
 
-    epoll_fd = epoll_create1(EPOLL_CLOEXEC);
-    if (epoll_fd == -1) {
-        PLOG(FATAL) << "epoll_create1 failed";
+    Epoll epoll;
+    if (auto result = epoll.Open(); !result) {
+        PLOG(FATAL) << result.error();
     }
 
-    sigchld_handler_init();
-
-    if (!IsRebootCapable()) {
-        // If init does not have the CAP_SYS_BOOT capability, it is running in a container.
-        // In that case, receiving SIGTERM will cause the system to shut down.
-        InstallSigtermHandler();
-    }
+    InstallSignalFdHandler(&epoll);
 
     property_load_boot_defaults();
     export_oem_lock_status();
-    start_property_service();
+    StartPropertyService(&epoll);
     set_usb_controller();
 
     const BuiltinFunctionMap function_map;
@@ -725,7 +771,16 @@
     am.QueueBuiltinAction(MixHwrngIntoLinuxRngAction, "MixHwrngIntoLinuxRng");
     am.QueueBuiltinAction(SetMmapRndBitsAction, "SetMmapRndBits");
     am.QueueBuiltinAction(SetKptrRestrictAction, "SetKptrRestrict");
-    am.QueueBuiltinAction(keychord_init_action, "keychord_init");
+    Keychords keychords;
+    am.QueueBuiltinAction(
+        [&epoll, &keychords](const BuiltinArguments& args) -> Result<Success> {
+            for (const auto& svc : ServiceList::GetInstance()) {
+                keychords.Register(svc->keycodes());
+            }
+            keychords.Start(&epoll, HandleKeychord);
+            return Success();
+        },
+        "KeychordInit");
     am.QueueBuiltinAction(console_init_action, "console_init");
 
     // Trigger all the boot actions to get us started.
@@ -748,7 +803,7 @@
 
     while (true) {
         // By default, sleep until something happens.
-        int epoll_timeout_ms = -1;
+        auto epoll_timeout = std::optional<std::chrono::milliseconds>{};
 
         if (do_shutdown && !shutting_down) {
             do_shutdown = false;
@@ -766,23 +821,18 @@
 
                 // If there's a process that needs restarting, wake up in time for that.
                 if (next_process_restart_time) {
-                    epoll_timeout_ms = std::chrono::ceil<std::chrono::milliseconds>(
-                                           *next_process_restart_time - boot_clock::now())
-                                           .count();
-                    if (epoll_timeout_ms < 0) epoll_timeout_ms = 0;
+                    epoll_timeout = std::chrono::ceil<std::chrono::milliseconds>(
+                        *next_process_restart_time - boot_clock::now());
+                    if (*epoll_timeout < 0ms) epoll_timeout = 0ms;
                 }
             }
 
             // If there's more work to do, wake up again immediately.
-            if (am.HasMoreCommands()) epoll_timeout_ms = 0;
+            if (am.HasMoreCommands()) epoll_timeout = 0ms;
         }
 
-        epoll_event ev;
-        int nr = TEMP_FAILURE_RETRY(epoll_wait(epoll_fd, &ev, 1, epoll_timeout_ms));
-        if (nr == -1) {
-            PLOG(ERROR) << "epoll_wait failed";
-        } else if (nr == 1) {
-            ((void (*)()) ev.data.ptr)();
+        if (auto result = epoll.Wait(epoll_timeout); !result) {
+            LOG(ERROR) << result.error();
         }
     }
 
diff --git a/init/init.h b/init/init.h
index d4a0e96..6c82fa1 100644
--- a/init/init.h
+++ b/init/init.h
@@ -19,6 +19,7 @@
 
 #include <sys/types.h>
 
+#include <functional>
 #include <string>
 #include <vector>
 
@@ -42,8 +43,6 @@
 
 void property_changed(const std::string& name, const std::string& value);
 
-void register_epoll_handler(int fd, void (*fn)());
-
 bool start_waiting_for_property(const char *name, const char *value);
 
 void DumpState();
diff --git a/init/init_first_stage.cpp b/init/init_first_stage.cpp
index 033ce41..db60ce1 100644
--- a/init/init_first_stage.cpp
+++ b/init/init_first_stage.cpp
@@ -33,11 +33,13 @@
 #include "devices.h"
 #include "fs_mgr.h"
 #include "fs_mgr_avb.h"
+#include "fs_mgr_dm_linear.h"
 #include "uevent.h"
 #include "uevent_listener.h"
 #include "util.h"
 
 using android::base::Timer;
+using android::fs_mgr::LogicalPartitionTable;
 
 namespace android {
 namespace init {
@@ -58,18 +60,21 @@
   protected:
     ListenerAction HandleBlockDevice(const std::string& name, const Uevent&);
     bool InitRequiredDevices();
-    bool InitVerityDevice(const std::string& verity_device);
+    bool InitMappedDevice(const std::string& verity_device);
+    bool CreateLogicalPartitions();
     bool MountPartitions();
+    bool GetBackingDmLinearDevices();
 
     virtual ListenerAction UeventCallback(const Uevent& uevent);
 
     // Pure virtual functions.
-    virtual bool GetRequiredDevices() = 0;
+    virtual bool GetDmVerityDevices() = 0;
     virtual bool SetUpDmVerity(fstab_rec* fstab_rec) = 0;
 
     bool need_dm_verity_;
 
     std::unique_ptr<fstab, decltype(&fs_mgr_free_fstab)> device_tree_fstab_;
+    std::unique_ptr<LogicalPartitionTable> dm_linear_table_;
     std::vector<fstab_rec*> mount_fstab_recs_;
     std::set<std::string> required_devices_partition_names_;
     std::unique_ptr<DeviceHandler> device_handler_;
@@ -82,7 +87,7 @@
     ~FirstStageMountVBootV1() override = default;
 
   protected:
-    bool GetRequiredDevices() override;
+    bool GetDmVerityDevices() override;
     bool SetUpDmVerity(fstab_rec* fstab_rec) override;
 };
 
@@ -95,7 +100,7 @@
 
   protected:
     ListenerAction UeventCallback(const Uevent& uevent) override;
-    bool GetRequiredDevices() override;
+    bool GetDmVerityDevices() override;
     bool SetUpDmVerity(fstab_rec* fstab_rec) override;
     bool InitAvbHandle();
 
@@ -114,18 +119,33 @@
     return access("/sbin/recovery", F_OK) == 0;
 }
 
+static inline bool IsDmLinearEnabled() {
+    bool enabled = false;
+    import_kernel_cmdline(
+        false, [&enabled](const std::string& key, const std::string& value, bool in_qemu) {
+            if (key == "androidboot.logical_partitions" && value == "1") {
+                enabled = true;
+            }
+        });
+    return enabled;
+}
+
 // Class Definitions
 // -----------------
 FirstStageMount::FirstStageMount()
     : need_dm_verity_(false), device_tree_fstab_(fs_mgr_read_fstab_dt(), fs_mgr_free_fstab) {
-    if (!device_tree_fstab_) {
+    if (device_tree_fstab_) {
+        // Stores device_tree_fstab_->recs[] into mount_fstab_recs_ (vector<fstab_rec*>)
+        // for easier manipulation later, e.g., range-base for loop.
+        for (int i = 0; i < device_tree_fstab_->num_entries; i++) {
+            mount_fstab_recs_.push_back(&device_tree_fstab_->recs[i]);
+        }
+    } else {
         LOG(INFO) << "Failed to read fstab from device tree";
-        return;
     }
-    // Stores device_tree_fstab_->recs[] into mount_fstab_recs_ (vector<fstab_rec*>)
-    // for easier manipulation later, e.g., range-base for loop.
-    for (int i = 0; i < device_tree_fstab_->num_entries; i++) {
-        mount_fstab_recs_.push_back(&device_tree_fstab_->recs[i]);
+
+    if (IsDmLinearEnabled()) {
+        dm_linear_table_ = android::fs_mgr::LoadPartitionsFromDeviceTree();
     }
 
     auto boot_devices = fs_mgr_get_boot_devices();
@@ -143,18 +163,38 @@
 }
 
 bool FirstStageMount::DoFirstStageMount() {
-    // Nothing to mount.
-    if (mount_fstab_recs_.empty()) return true;
+    if (!dm_linear_table_ && mount_fstab_recs_.empty()) {
+        // Nothing to mount.
+        LOG(INFO) << "First stage mount skipped (missing/incompatible/empty fstab in device tree)";
+        return true;
+    }
 
     if (!InitDevices()) return false;
 
+    if (!CreateLogicalPartitions()) return false;
+
     if (!MountPartitions()) return false;
 
     return true;
 }
 
 bool FirstStageMount::InitDevices() {
-    return GetRequiredDevices() && InitRequiredDevices();
+    return GetBackingDmLinearDevices() && GetDmVerityDevices() && InitRequiredDevices();
+}
+
+bool FirstStageMount::GetBackingDmLinearDevices() {
+    // Add any additional devices required for dm-linear mappings.
+    if (!dm_linear_table_) {
+        return true;
+    }
+
+    for (const auto& partition : dm_linear_table_->partitions) {
+        for (const auto& extent : partition.extents) {
+            const std::string& partition_name = android::base::Basename(extent.block_device());
+            required_devices_partition_names_.emplace(partition_name);
+        }
+    }
+    return true;
 }
 
 // Creates devices with uevent->partition_name matching one in the member variable
@@ -165,7 +205,7 @@
         return true;
     }
 
-    if (need_dm_verity_) {
+    if (dm_linear_table_ || need_dm_verity_) {
         const std::string dm_path = "/devices/virtual/misc/device-mapper";
         bool found = false;
         auto dm_callback = [this, &dm_path, &found](const Uevent& uevent) {
@@ -212,6 +252,13 @@
     return true;
 }
 
+bool FirstStageMount::CreateLogicalPartitions() {
+    if (!dm_linear_table_) {
+        return true;
+    }
+    return android::fs_mgr::CreateLogicalPartitions(*dm_linear_table_.get());
+}
+
 ListenerAction FirstStageMount::HandleBlockDevice(const std::string& name, const Uevent& uevent) {
     // Matches partition name to create device nodes.
     // Both required_devices_partition_names_ and uevent->partition_name have A/B
@@ -249,14 +296,14 @@
 }
 
 // Creates "/dev/block/dm-XX" for dm-verity by running coldboot on /sys/block/dm-XX.
-bool FirstStageMount::InitVerityDevice(const std::string& verity_device) {
-    const std::string device_name(basename(verity_device.c_str()));
+bool FirstStageMount::InitMappedDevice(const std::string& dm_device) {
+    const std::string device_name(basename(dm_device.c_str()));
     const std::string syspath = "/sys/block/" + device_name;
     bool found = false;
 
-    auto verity_callback = [&device_name, &verity_device, this, &found](const Uevent& uevent) {
+    auto verity_callback = [&device_name, &dm_device, this, &found](const Uevent& uevent) {
         if (uevent.device_name == device_name) {
-            LOG(VERBOSE) << "Creating dm-verity device : " << verity_device;
+            LOG(VERBOSE) << "Creating device-mapper device : " << dm_device;
             device_handler_->HandleDeviceEvent(uevent);
             found = true;
             return ListenerAction::kStop;
@@ -281,6 +328,14 @@
 
 bool FirstStageMount::MountPartitions() {
     for (auto fstab_rec : mount_fstab_recs_) {
+        if (fs_mgr_is_logical(fstab_rec)) {
+            if (!fs_mgr_update_logical_partition(fstab_rec)) {
+                return false;
+            }
+            if (!InitMappedDevice(fstab_rec->blk_device)) {
+                return false;
+            }
+        }
         if (!SetUpDmVerity(fstab_rec)) {
             PLOG(ERROR) << "Failed to setup verity for '" << fstab_rec->mount_point << "'";
             return false;
@@ -293,7 +348,7 @@
     return true;
 }
 
-bool FirstStageMountVBootV1::GetRequiredDevices() {
+bool FirstStageMountVBootV1::GetDmVerityDevices() {
     std::string verity_loc_device;
     need_dm_verity_ = false;
 
@@ -346,7 +401,7 @@
                 // The exact block device name (fstab_rec->blk_device) is changed to
                 // "/dev/block/dm-XX". Needs to create it because ueventd isn't started in init
                 // first stage.
-                return InitVerityDevice(fstab_rec->blk_device);
+                return InitMappedDevice(fstab_rec->blk_device);
             default:
                 return false;
         }
@@ -373,7 +428,7 @@
     }
 }
 
-bool FirstStageMountVBootV2::GetRequiredDevices() {
+bool FirstStageMountVBootV2::GetDmVerityDevices() {
     need_dm_verity_ = false;
 
     // fstab_rec->blk_device has A/B suffix.
@@ -445,7 +500,7 @@
                 // The exact block device name (fstab_rec->blk_device) is changed to
                 // "/dev/block/dm-XX". Needs to create it because ueventd isn't started in init
                 // first stage.
-                return InitVerityDevice(fstab_rec->blk_device);
+                return InitMappedDevice(fstab_rec->blk_device);
             default:
                 return false;
         }
@@ -483,12 +538,6 @@
         return true;
     }
 
-    // Firstly checks if device tree fstab entries are compatible.
-    if (!is_android_dt_value_expected("fstab/compatible", "android,fstab")) {
-        LOG(INFO) << "First stage mount skipped (missing/incompatible fstab in device tree)";
-        return true;
-    }
-
     std::unique_ptr<FirstStageMount> handle = FirstStageMount::Create();
     if (!handle) {
         LOG(ERROR) << "Failed to create FirstStageMount";
diff --git a/init/keychords.cpp b/init/keychords.cpp
index e686ce1..1af06dd 100644
--- a/init/keychords.cpp
+++ b/init/keychords.cpp
@@ -16,110 +16,269 @@
 
 #include "keychords.h"
 
+#include <dirent.h>
 #include <fcntl.h>
-#include <stdlib.h>
-#include <sys/stat.h>
+#include <linux/input.h>
+#include <sys/cdefs.h>
+#include <sys/inotify.h>
+#include <sys/ioctl.h>
 #include <sys/types.h>
-#include <linux/keychord.h>
 #include <unistd.h>
 
-#include <android-base/logging.h>
-#include <android-base/properties.h>
+#include <algorithm>
+#include <functional>
+#include <map>
+#include <memory>
+#include <string>
+#include <vector>
 
-#include "init.h"
+#include <android-base/logging.h>
 
 namespace android {
 namespace init {
 
-static struct input_keychord *keychords = 0;
-static int keychords_count = 0;
-static int keychords_length = 0;
-static int keychord_fd = -1;
+Keychords::Keychords() : epoll_(nullptr), inotify_fd_(-1) {}
 
-void add_service_keycodes(Service* svc)
-{
-    struct input_keychord *keychord;
-    size_t i, size;
-
-    if (!svc->keycodes().empty()) {
-        /* add a new keychord to the list */
-        size = sizeof(*keychord) + svc->keycodes().size() * sizeof(keychord->keycodes[0]);
-        keychords = (input_keychord*) realloc(keychords, keychords_length + size);
-        if (!keychords) {
-            PLOG(ERROR) << "could not allocate keychords";
-            keychords_length = 0;
-            keychords_count = 0;
-            return;
-        }
-
-        keychord = (struct input_keychord *)((char *)keychords + keychords_length);
-        keychord->version = KEYCHORD_VERSION;
-        keychord->id = keychords_count + 1;
-        keychord->count = svc->keycodes().size();
-        svc->set_keychord_id(keychord->id);
-
-        for (i = 0; i < svc->keycodes().size(); i++) {
-            keychord->keycodes[i] = svc->keycodes()[i];
-        }
-        keychords_count++;
-        keychords_length += size;
+Keychords::~Keychords() noexcept {
+    if (inotify_fd_ >= 0) {
+        epoll_->UnregisterHandler(inotify_fd_);
+        ::close(inotify_fd_);
     }
+    while (!registration_.empty()) GeteventCloseDevice(registration_.begin()->first);
 }
 
-static void handle_keychord() {
-    int ret;
-    __u16 id;
+Keychords::Mask::Mask(size_t bit) : bits_((bit + sizeof(mask_t) - 1) / sizeof(mask_t), 0) {}
 
-    ret = read(keychord_fd, &id, sizeof(id));
-    if (ret != sizeof(id)) {
-        PLOG(ERROR) << "could not read keychord id";
-        return;
-    }
-
-    // Only handle keychords if adb is enabled.
-    std::string adb_enabled = android::base::GetProperty("init.svc.adbd", "");
-    if (adb_enabled == "running") {
-        Service* svc = ServiceList::GetInstance().FindService(id, &Service::keychord_id);
-        if (svc) {
-            LOG(INFO) << "Starting service '" << svc->name() << "' from keychord " << id;
-            if (auto result = svc->Start(); !result) {
-                LOG(ERROR) << "Could not start service '" << svc->name() << "' from keychord " << id
-                           << ": " << result.error();
-            }
-        } else {
-            LOG(ERROR) << "Service for keychord " << id << " not found";
-        }
+void Keychords::Mask::SetBit(size_t bit, bool value) {
+    auto idx = bit / (kBitsPerByte * sizeof(mask_t));
+    if (idx >= bits_.size()) return;
+    if (value) {
+        bits_[idx] |= mask_t(1) << (bit % (kBitsPerByte * sizeof(mask_t)));
     } else {
-        LOG(WARNING) << "Not starting service for keychord " << id << " because ADB is disabled";
+        bits_[idx] &= ~(mask_t(1) << (bit % (kBitsPerByte * sizeof(mask_t))));
     }
 }
 
-void keychord_init() {
-    for (const auto& service : ServiceList::GetInstance()) {
-        add_service_keycodes(service.get());
+bool Keychords::Mask::GetBit(size_t bit) const {
+    auto idx = bit / (kBitsPerByte * sizeof(mask_t));
+    return bits_[idx] & (mask_t(1) << (bit % (kBitsPerByte * sizeof(mask_t))));
+}
+
+size_t Keychords::Mask::bytesize() const {
+    return bits_.size() * sizeof(mask_t);
+}
+
+void* Keychords::Mask::data() {
+    return bits_.data();
+}
+
+size_t Keychords::Mask::size() const {
+    return bits_.size() * sizeof(mask_t) * kBitsPerByte;
+}
+
+void Keychords::Mask::resize(size_t bit) {
+    auto idx = bit / (kBitsPerByte * sizeof(mask_t));
+    if (idx >= bits_.size()) {
+        bits_.resize(idx + 1, 0);
+    }
+}
+
+Keychords::Mask::operator bool() const {
+    for (size_t i = 0; i < bits_.size(); ++i) {
+        if (bits_[i]) return true;
+    }
+    return false;
+}
+
+Keychords::Mask Keychords::Mask::operator&(const Keychords::Mask& rval) const {
+    auto len = std::min(bits_.size(), rval.bits_.size());
+    Keychords::Mask ret;
+    ret.bits_.resize(len);
+    for (size_t i = 0; i < len; ++i) {
+        ret.bits_[i] = bits_[i] & rval.bits_[i];
+    }
+    return ret;
+}
+
+void Keychords::Mask::operator|=(const Keychords::Mask& rval) {
+    auto len = rval.bits_.size();
+    bits_.resize(len);
+    for (size_t i = 0; i < len; ++i) {
+        bits_[i] |= rval.bits_[i];
+    }
+}
+
+Keychords::Entry::Entry() : notified(false) {}
+
+void Keychords::LambdaCheck() {
+    for (auto& [keycodes, entry] : entries_) {
+        auto found = true;
+        for (auto& code : keycodes) {
+            if (!current_.GetBit(code)) {
+                entry.notified = false;
+                found = false;
+                break;
+            }
+        }
+        if (!found) continue;
+        if (entry.notified) continue;
+        entry.notified = true;
+        handler_(keycodes);
+    }
+}
+
+void Keychords::LambdaHandler(int fd) {
+    input_event event;
+    auto res = TEMP_FAILURE_RETRY(::read(fd, &event, sizeof(event)));
+    if ((res != sizeof(event)) || (event.type != EV_KEY)) return;
+    current_.SetBit(event.code, event.value);
+    LambdaCheck();
+}
+
+bool Keychords::GeteventEnable(int fd) {
+    // Make sure it is an event channel, should pass this ioctl call
+    int version;
+    if (::ioctl(fd, EVIOCGVERSION, &version)) return false;
+
+#ifdef EVIOCSMASK
+    static auto EviocsmaskSupported = true;
+    if (EviocsmaskSupported) {
+        Keychords::Mask mask(EV_KEY);
+        mask.SetBit(EV_KEY);
+        input_mask msg = {};
+        msg.type = EV_SYN;
+        msg.codes_size = mask.bytesize();
+        msg.codes_ptr = reinterpret_cast<uintptr_t>(mask.data());
+        if (::ioctl(fd, EVIOCSMASK, &msg) == -1) {
+            PLOG(WARNING) << "EVIOCSMASK not supported";
+            EviocsmaskSupported = false;
+        }
+    }
+#endif
+
+    Keychords::Mask mask;
+    for (auto& [keycodes, entry] : entries_) {
+        for (auto& code : keycodes) {
+            mask.resize(code);
+            mask.SetBit(code);
+        }
     }
 
-    // Nothing to do if no services require keychords.
-    if (!keychords) {
+    current_.resize(mask.size());
+    Keychords::Mask available(mask.size());
+    auto res = ::ioctl(fd, EVIOCGBIT(EV_KEY, available.bytesize()), available.data());
+    if (res == -1) return false;
+    if (!(available & mask)) return false;
+
+#ifdef EVIOCSMASK
+    if (EviocsmaskSupported) {
+        input_mask msg = {};
+        msg.type = EV_KEY;
+        msg.codes_size = mask.bytesize();
+        msg.codes_ptr = reinterpret_cast<uintptr_t>(mask.data());
+        ::ioctl(fd, EVIOCSMASK, &msg);
+    }
+#endif
+
+    Keychords::Mask set(mask.size());
+    res = ::ioctl(fd, EVIOCGKEY(res), set.data());
+    if (res > 0) {
+        current_ |= mask & available & set;
+        LambdaCheck();
+    }
+    epoll_->RegisterHandler(fd, [this, fd]() { this->LambdaHandler(fd); });
+    return true;
+}
+
+void Keychords::GeteventOpenDevice(const std::string& device) {
+    if (registration_.count(device)) return;
+    auto fd = TEMP_FAILURE_RETRY(::open(device.c_str(), O_RDWR | O_CLOEXEC));
+    if (fd == -1) {
+        PLOG(ERROR) << "Can not open " << device;
+        return;
+    }
+    if (!GeteventEnable(fd)) {
+        ::close(fd);
+    } else {
+        registration_.emplace(device, fd);
+    }
+}
+
+void Keychords::GeteventCloseDevice(const std::string& device) {
+    auto it = registration_.find(device);
+    if (it == registration_.end()) return;
+    auto fd = (*it).second;
+    epoll_->UnregisterHandler(fd);
+    registration_.erase(it);
+    ::close(fd);
+}
+
+void Keychords::InotifyHandler() {
+    unsigned char buf[512];  // History shows 32-64 bytes typical
+
+    auto res = TEMP_FAILURE_RETRY(::read(inotify_fd_, buf, sizeof(buf)));
+    if (res < 0) {
+        PLOG(WARNING) << "could not get event";
         return;
     }
 
-    keychord_fd = TEMP_FAILURE_RETRY(open("/dev/keychord", O_RDWR | O_CLOEXEC));
-    if (keychord_fd == -1) {
-        PLOG(ERROR) << "could not open /dev/keychord";
-        return;
+    auto event_buf = buf;
+    while (static_cast<size_t>(res) >= sizeof(inotify_event)) {
+        auto event = reinterpret_cast<inotify_event*>(event_buf);
+        auto event_size = sizeof(inotify_event) + event->len;
+        if (static_cast<size_t>(res) < event_size) break;
+        if (event->len) {
+            std::string devname(kDevicePath);
+            devname += '/';
+            devname += event->name;
+            if (event->mask & IN_CREATE) {
+                GeteventOpenDevice(devname);
+            } else {
+                GeteventCloseDevice(devname);
+            }
+        }
+        res -= event_size;
+        event_buf += event_size;
+    }
+}
+
+void Keychords::GeteventOpenDevice() {
+    inotify_fd_ = ::inotify_init1(IN_NONBLOCK | IN_CLOEXEC);
+    if (inotify_fd_ < 0) {
+        PLOG(WARNING) << "Could not instantiate inotify for " << kDevicePath;
+    } else if (::inotify_add_watch(inotify_fd_, kDevicePath, IN_DELETE | IN_CREATE | IN_ONLYDIR) <
+               0) {
+        PLOG(WARNING) << "Could not add watch for " << kDevicePath;
+        ::close(inotify_fd_);
+        inotify_fd_ = -1;
     }
 
-    int ret = write(keychord_fd, keychords, keychords_length);
-    if (ret != keychords_length) {
-        PLOG(ERROR) << "could not configure /dev/keychord " << ret;
-        close(keychord_fd);
+    std::unique_ptr<DIR, decltype(&closedir)> device(opendir(kDevicePath), closedir);
+    if (device) {
+        dirent* entry;
+        while ((entry = readdir(device.get()))) {
+            if (entry->d_name[0] == '.') continue;
+            std::string devname(kDevicePath);
+            devname += '/';
+            devname += entry->d_name;
+            GeteventOpenDevice(devname);
+        }
     }
 
-    free(keychords);
-    keychords = nullptr;
+    if (inotify_fd_ >= 0) {
+        epoll_->RegisterHandler(inotify_fd_, [this]() { this->InotifyHandler(); });
+    }
+}
 
-    register_epoll_handler(keychord_fd, handle_keychord);
+void Keychords::Register(const std::vector<int>& keycodes) {
+    if (keycodes.empty()) return;
+    entries_.try_emplace(keycodes, Entry());
+}
+
+void Keychords::Start(Epoll* epoll, std::function<void(const std::vector<int>&)> handler) {
+    epoll_ = epoll;
+    handler_ = handler;
+    if (entries_.size()) GeteventOpenDevice();
 }
 
 }  // namespace init
diff --git a/init/keychords.h b/init/keychords.h
index 1c34098..00ed205 100644
--- a/init/keychords.h
+++ b/init/keychords.h
@@ -17,13 +17,81 @@
 #ifndef _INIT_KEYCHORDS_H_
 #define _INIT_KEYCHORDS_H_
 
-#include "service.h"
+#include <functional>
+#include <map>
+#include <string>
+#include <vector>
+
+#include "epoll.h"
 
 namespace android {
 namespace init {
 
-void add_service_keycodes(Service* svc);
-void keychord_init();
+class Keychords {
+  public:
+    Keychords();
+    Keychords(const Keychords&) = delete;
+    Keychords(Keychords&&) = delete;
+    Keychords& operator=(const Keychords&) = delete;
+    Keychords& operator=(Keychords&&) = delete;
+    ~Keychords() noexcept;
+
+    void Register(const std::vector<int>& keycodes);
+    void Start(Epoll* epoll, std::function<void(const std::vector<int>&)> handler);
+
+  private:
+    // Bit management
+    class Mask {
+      public:
+        explicit Mask(size_t bit = 0);
+
+        void SetBit(size_t bit, bool value = true);
+        bool GetBit(size_t bit) const;
+
+        size_t bytesize() const;
+        void* data();
+        size_t size() const;
+        void resize(size_t bit);
+
+        operator bool() const;
+        Mask operator&(const Mask& rval) const;
+        void operator|=(const Mask& rval);
+
+      private:
+        typedef unsigned int mask_t;
+        static constexpr size_t kBitsPerByte = 8;
+
+        std::vector<mask_t> bits_;
+    };
+
+    struct Entry {
+        Entry();
+
+        bool notified;
+    };
+
+    static constexpr char kDevicePath[] = "/dev/input";
+
+    void LambdaCheck();
+    void LambdaHandler(int fd);
+    void InotifyHandler();
+
+    bool GeteventEnable(int fd);
+    void GeteventOpenDevice(const std::string& device);
+    void GeteventOpenDevice();
+    void GeteventCloseDevice(const std::string& device);
+
+    Epoll* epoll_;
+    std::function<void(const std::vector<int>&)> handler_;
+
+    std::map<std::string, int> registration_;
+
+    std::map<const std::vector<int>, Entry> entries_;
+
+    Mask current_;
+
+    int inotify_fd_;
+};
 
 }  // namespace init
 }  // namespace android
diff --git a/init/keychords_test.cpp b/init/keychords_test.cpp
new file mode 100644
index 0000000..c8c47a8
--- /dev/null
+++ b/init/keychords_test.cpp
@@ -0,0 +1,348 @@
+/*
+ * 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 "keychords.h"
+
+#include <dirent.h>
+#include <fcntl.h>
+#include <linux/input.h>
+#include <linux/uinput.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <chrono>
+#include <set>
+#include <string>
+#include <vector>
+
+#include <android-base/properties.h>
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+#include <gtest/gtest.h>
+
+#include "epoll.h"
+
+using namespace std::chrono_literals;
+
+namespace android {
+namespace init {
+
+namespace {
+
+// This class is used to inject keys.
+class EventHandler {
+  public:
+    EventHandler();
+    EventHandler(const EventHandler&) = delete;
+    EventHandler(EventHandler&&);
+    EventHandler& operator=(const EventHandler&) = delete;
+    EventHandler& operator=(EventHandler&&);
+    ~EventHandler() noexcept;
+
+    bool init();
+
+    bool send(struct input_event& e);
+    bool send(uint16_t type, uint16_t code, uint16_t value);
+    bool send(uint16_t code, bool value);
+
+  private:
+    int fd_;
+};
+
+EventHandler::EventHandler() : fd_(-1) {}
+
+EventHandler::EventHandler(EventHandler&& rval) : fd_(rval.fd_) {
+    rval.fd_ = -1;
+}
+
+EventHandler& EventHandler::operator=(EventHandler&& rval) {
+    fd_ = rval.fd_;
+    rval.fd_ = -1;
+    return *this;
+}
+
+EventHandler::~EventHandler() {
+    if (fd_ == -1) return;
+    ::ioctl(fd_, UI_DEV_DESTROY);
+    ::close(fd_);
+}
+
+bool EventHandler::init() {
+    if (fd_ != -1) return true;
+    auto fd = TEMP_FAILURE_RETRY(::open("/dev/uinput", O_WRONLY | O_NONBLOCK | O_CLOEXEC));
+    if (fd == -1) return false;
+    if (::ioctl(fd, UI_SET_EVBIT, EV_KEY) == -1) {
+        ::close(fd);
+        return false;
+    }
+
+    static const struct uinput_user_dev u = {
+        .name = "com.google.android.init.test",
+        .id.bustype = BUS_VIRTUAL,
+        .id.vendor = 0x1AE0,   // Google
+        .id.product = 0x494E,  // IN
+        .id.version = 1,
+    };
+    if (TEMP_FAILURE_RETRY(::write(fd, &u, sizeof(u))) != sizeof(u)) {
+        ::close(fd);
+        return false;
+    }
+
+    // all keys
+    for (uint16_t i = 0; i < KEY_MAX; ++i) {
+        if (::ioctl(fd, UI_SET_KEYBIT, i) == -1) {
+            ::close(fd);
+            return false;
+        }
+    }
+    if (::ioctl(fd, UI_DEV_CREATE) == -1) {
+        ::close(fd);
+        return false;
+    }
+    fd_ = fd;
+    return true;
+}
+
+bool EventHandler::send(struct input_event& e) {
+    gettimeofday(&e.time, nullptr);
+    return TEMP_FAILURE_RETRY(::write(fd_, &e, sizeof(e))) == sizeof(e);
+}
+
+bool EventHandler::send(uint16_t type, uint16_t code, uint16_t value) {
+    struct input_event e = {.type = type, .code = code, .value = value};
+    return send(e);
+}
+
+bool EventHandler::send(uint16_t code, bool value) {
+    return (code < KEY_MAX) && init() && send(EV_KEY, code, value) && send(EV_SYN, SYN_REPORT, 0);
+}
+
+std::string InitFds(const char* prefix, pid_t pid = getpid()) {
+    std::string ret;
+
+    std::string init_fds("/proc/");
+    init_fds += std::to_string(pid) + "/fd";
+    std::unique_ptr<DIR, decltype(&closedir)> fds(opendir(init_fds.c_str()), closedir);
+    if (!fds) return ret;
+
+    dirent* entry;
+    while ((entry = readdir(fds.get()))) {
+        if (entry->d_name[0] == '.') continue;
+        std::string devname = init_fds + '/' + entry->d_name;
+        char buf[256];
+        auto retval = readlink(devname.c_str(), buf, sizeof(buf) - 1);
+        if ((retval < 0) || (size_t(retval) >= (sizeof(buf) - 1))) continue;
+        buf[retval] = '\0';
+        if (!android::base::StartsWith(buf, prefix)) continue;
+        if (ret.size() != 0) ret += ",";
+        ret += buf;
+    }
+    return ret;
+}
+
+std::string InitInputFds() {
+    return InitFds("/dev/input/");
+}
+
+std::string InitInotifyFds() {
+    return InitFds("anon_inode:inotify");
+}
+
+// NB: caller (this series of tests, or conversely the service parser in init)
+// is responsible for validation, sorting and uniqueness of the chords, so no
+// fuzzing is advised.
+
+const std::vector<int> escape_chord = {KEY_ESC};
+const std::vector<int> triple1_chord = {KEY_BACKSPACE, KEY_VOLUMEDOWN, KEY_VOLUMEUP};
+const std::vector<int> triple2_chord = {KEY_VOLUMEDOWN, KEY_VOLUMEUP, KEY_BACK};
+
+const std::vector<const std::vector<int>> empty_chords;
+const std::vector<const std::vector<int>> chords = {
+    escape_chord,
+    triple1_chord,
+    triple2_chord,
+};
+
+class TestFrame {
+  public:
+    TestFrame(const std::vector<const std::vector<int>>& chords, EventHandler* ev = nullptr);
+
+    void RelaxForMs(std::chrono::milliseconds wait = 1ms);
+
+    void SetChord(int key, bool value = true);
+    void SetChords(const std::vector<int>& chord, bool value = true);
+    void ClrChord(int key);
+    void ClrChords(const std::vector<int>& chord);
+
+    bool IsOnlyChord(const std::vector<int>& chord) const;
+    bool IsNoChord() const;
+    bool IsChord(const std::vector<int>& chord) const;
+    void WaitForChord(const std::vector<int>& chord);
+
+    std::string Format() const;
+
+  private:
+    static std::string Format(const std::vector<const std::vector<int>>& chords);
+
+    Epoll epoll_;
+    Keychords keychords_;
+    std::vector<const std::vector<int>> keycodes_;
+    EventHandler* ev_;
+};
+
+TestFrame::TestFrame(const std::vector<const std::vector<int>>& chords, EventHandler* ev)
+    : ev_(ev) {
+    if (!epoll_.Open()) return;
+    for (const auto& keycodes : chords) keychords_.Register(keycodes);
+    keychords_.Start(&epoll_, [this](const std::vector<int>& keycodes) {
+        this->keycodes_.emplace_back(keycodes);
+    });
+}
+
+void TestFrame::RelaxForMs(std::chrono::milliseconds wait) {
+    epoll_.Wait(wait);
+}
+
+void TestFrame::SetChord(int key, bool value) {
+    ASSERT_TRUE(!!ev_);
+    RelaxForMs();
+    EXPECT_TRUE(ev_->send(key, value));
+}
+
+void TestFrame::SetChords(const std::vector<int>& chord, bool value) {
+    ASSERT_TRUE(!!ev_);
+    for (auto& key : chord) SetChord(key, value);
+    RelaxForMs();
+}
+
+void TestFrame::ClrChord(int key) {
+    ASSERT_TRUE(!!ev_);
+    SetChord(key, false);
+}
+
+void TestFrame::ClrChords(const std::vector<int>& chord) {
+    ASSERT_TRUE(!!ev_);
+    SetChords(chord, false);
+}
+
+bool TestFrame::IsOnlyChord(const std::vector<int>& chord) const {
+    auto ret = false;
+    for (const auto& keycode : keycodes_) {
+        if (keycode != chord) return false;
+        ret = true;
+    }
+    return ret;
+}
+
+bool TestFrame::IsNoChord() const {
+    return keycodes_.empty();
+}
+
+bool TestFrame::IsChord(const std::vector<int>& chord) const {
+    for (const auto& keycode : keycodes_) {
+        if (keycode == chord) return true;
+    }
+    return false;
+}
+
+void TestFrame::WaitForChord(const std::vector<int>& chord) {
+    for (int retry = 1000; retry && !IsChord(chord); --retry) RelaxForMs();
+}
+
+std::string TestFrame::Format(const std::vector<const std::vector<int>>& chords) {
+    std::string ret("{");
+    if (!chords.empty()) {
+        ret += android::base::Join(chords.front(), ' ');
+        for (auto it = std::next(chords.begin()); it != chords.end(); ++it) {
+            ret += ',';
+            ret += android::base::Join(*it, ' ');
+        }
+    }
+    return ret + '}';
+}
+
+std::string TestFrame::Format() const {
+    return Format(keycodes_);
+}
+
+}  // namespace
+
+TEST(keychords, not_instantiated) {
+    TestFrame test_frame(empty_chords);
+    EXPECT_TRUE(InitInotifyFds().size() == 0);
+}
+
+TEST(keychords, instantiated) {
+    // Test if a valid set of chords results in proper instantiation of the
+    // underlying mechanisms for /dev/input/ attachment.
+    TestFrame test_frame(chords);
+    EXPECT_TRUE(InitInotifyFds().size() != 0);
+}
+
+TEST(keychords, init_inotify) {
+    std::string before(InitInputFds());
+
+    TestFrame test_frame(chords);
+
+    EventHandler ev;
+    EXPECT_TRUE(ev.init());
+
+    for (int retry = 1000; retry && before == InitInputFds(); --retry) test_frame.RelaxForMs();
+    std::string after(InitInputFds());
+    EXPECT_NE(before, after);
+}
+
+TEST(keychords, key) {
+    EventHandler ev;
+    EXPECT_TRUE(ev.init());
+    TestFrame test_frame(chords, &ev);
+
+    test_frame.SetChords(escape_chord);
+    test_frame.WaitForChord(escape_chord);
+    test_frame.ClrChords(escape_chord);
+    EXPECT_TRUE(test_frame.IsOnlyChord(escape_chord))
+        << "expected only " << android::base::Join(escape_chord, ' ') << " got "
+        << test_frame.Format();
+}
+
+TEST(keychords, keys_in_series) {
+    EventHandler ev;
+    EXPECT_TRUE(ev.init());
+    TestFrame test_frame(chords, &ev);
+
+    for (auto& key : triple1_chord) {
+        test_frame.SetChord(key);
+        test_frame.ClrChord(key);
+    }
+    test_frame.WaitForChord(triple1_chord);
+    EXPECT_TRUE(test_frame.IsNoChord()) << "expected nothing got " << test_frame.Format();
+}
+
+TEST(keychords, keys_in_parallel) {
+    EventHandler ev;
+    EXPECT_TRUE(ev.init());
+    TestFrame test_frame(chords, &ev);
+
+    test_frame.SetChords(triple2_chord);
+    test_frame.WaitForChord(triple2_chord);
+    test_frame.ClrChords(triple2_chord);
+    EXPECT_TRUE(test_frame.IsOnlyChord(triple2_chord))
+        << "expected only " << android::base::Join(triple2_chord, ' ') << " got "
+        << test_frame.Format();
+}
+
+}  // namespace init
+}  // namespace android
diff --git a/init/parser.cpp b/init/parser.cpp
index 4453aaa..4f1cac4 100644
--- a/init/parser.cpp
+++ b/init/parser.cpp
@@ -39,7 +39,7 @@
     line_callbacks_.emplace_back(prefix, callback);
 }
 
-void Parser::ParseData(const std::string& filename, const std::string& data, size_t* parse_errors) {
+void Parser::ParseData(const std::string& filename, const std::string& data) {
     // TODO: Use a parser with const input and remove this copy
     std::vector<char> data_copy(data.begin(), data.end());
     data_copy.push_back('\0');
@@ -57,7 +57,7 @@
         if (section_parser == nullptr) return;
 
         if (auto result = section_parser->EndSection(); !result) {
-            (*parse_errors)++;
+            parse_error_count_++;
             LOG(ERROR) << filename << ": " << section_start_line << ": " << result.error();
         }
 
@@ -70,43 +70,47 @@
             case T_EOF:
                 end_section();
                 return;
-            case T_NEWLINE:
+            case T_NEWLINE: {
                 state.line++;
                 if (args.empty()) break;
                 // If we have a line matching a prefix we recognize, call its callback and unset any
                 // current section parsers.  This is meant for /sys/ and /dev/ line entries for
                 // uevent.
-                for (const auto& [prefix, callback] : line_callbacks_) {
-                    if (android::base::StartsWith(args[0], prefix)) {
-                        end_section();
+                auto line_callback = std::find_if(
+                    line_callbacks_.begin(), line_callbacks_.end(),
+                    [&args](const auto& c) { return android::base::StartsWith(args[0], c.first); });
+                if (line_callback != line_callbacks_.end()) {
+                    end_section();
 
-                        if (auto result = callback(std::move(args)); !result) {
-                            (*parse_errors)++;
-                            LOG(ERROR) << filename << ": " << state.line << ": " << result.error();
-                        }
-                        break;
+                    if (auto result = line_callback->second(std::move(args)); !result) {
+                        parse_error_count_++;
+                        LOG(ERROR) << filename << ": " << state.line << ": " << result.error();
                     }
-                }
-                if (section_parsers_.count(args[0])) {
+                } else if (section_parsers_.count(args[0])) {
                     end_section();
                     section_parser = section_parsers_[args[0]].get();
                     section_start_line = state.line;
                     if (auto result =
                             section_parser->ParseSection(std::move(args), filename, state.line);
                         !result) {
-                        (*parse_errors)++;
+                        parse_error_count_++;
                         LOG(ERROR) << filename << ": " << state.line << ": " << result.error();
                         section_parser = nullptr;
                     }
                 } else if (section_parser) {
                     if (auto result = section_parser->ParseLineSection(std::move(args), state.line);
                         !result) {
-                        (*parse_errors)++;
+                        parse_error_count_++;
                         LOG(ERROR) << filename << ": " << state.line << ": " << result.error();
                     }
+                } else {
+                    parse_error_count_++;
+                    LOG(ERROR) << filename << ": " << state.line
+                               << ": Invalid section keyword found";
                 }
                 args.clear();
                 break;
+            }
             case T_TEXT:
                 args.emplace_back(state.text);
                 break;
@@ -114,17 +118,17 @@
     }
 }
 
-bool Parser::ParseConfigFile(const std::string& path, size_t* parse_errors) {
+bool Parser::ParseConfigFile(const std::string& path) {
     LOG(INFO) << "Parsing file " << path << "...";
     android::base::Timer t;
     auto config_contents = ReadFile(path);
     if (!config_contents) {
-        LOG(ERROR) << "Unable to read config file '" << path << "': " << config_contents.error();
+        LOG(INFO) << "Unable to read config file '" << path << "': " << config_contents.error();
         return false;
     }
 
     config_contents->push_back('\n');  // TODO: fix parse_config.
-    ParseData(path, *config_contents, parse_errors);
+    ParseData(path, *config_contents);
     for (const auto& [section_name, section_parser] : section_parsers_) {
         section_parser->EndFile();
     }
@@ -133,11 +137,11 @@
     return true;
 }
 
-bool Parser::ParseConfigDir(const std::string& path, size_t* parse_errors) {
+bool Parser::ParseConfigDir(const std::string& path) {
     LOG(INFO) << "Parsing directory " << path << "...";
     std::unique_ptr<DIR, decltype(&closedir)> config_dir(opendir(path.c_str()), closedir);
     if (!config_dir) {
-        PLOG(ERROR) << "Could not import directory '" << path << "'";
+        PLOG(INFO) << "Could not import directory '" << path << "'";
         return false;
     }
     dirent* current_file;
@@ -153,7 +157,7 @@
     // Sort first so we load files in a consistent order (bug 31996208)
     std::sort(files.begin(), files.end());
     for (const auto& file : files) {
-        if (!ParseConfigFile(file, parse_errors)) {
+        if (!ParseConfigFile(file)) {
             LOG(ERROR) << "could not import file '" << file << "'";
         }
     }
@@ -161,16 +165,10 @@
 }
 
 bool Parser::ParseConfig(const std::string& path) {
-    size_t parse_errors;
-    return ParseConfig(path, &parse_errors);
-}
-
-bool Parser::ParseConfig(const std::string& path, size_t* parse_errors) {
-    *parse_errors = 0;
     if (is_dir(path.c_str())) {
-        return ParseConfigDir(path, parse_errors);
+        return ParseConfigDir(path);
     }
-    return ParseConfigFile(path, parse_errors);
+    return ParseConfigFile(path);
 }
 
 }  // namespace init
diff --git a/init/parser.h b/init/parser.h
index f6e237f..3501d8c 100644
--- a/init/parser.h
+++ b/init/parser.h
@@ -72,17 +72,19 @@
     Parser();
 
     bool ParseConfig(const std::string& path);
-    bool ParseConfig(const std::string& path, size_t* parse_errors);
     void AddSectionParser(const std::string& name, std::unique_ptr<SectionParser> parser);
     void AddSingleLineParser(const std::string& prefix, LineCallback callback);
 
+    size_t parse_error_count() const { return parse_error_count_; }
+
   private:
-    void ParseData(const std::string& filename, const std::string& data, size_t* parse_errors);
-    bool ParseConfigFile(const std::string& path, size_t* parse_errors);
-    bool ParseConfigDir(const std::string& path, size_t* parse_errors);
+    void ParseData(const std::string& filename, const std::string& data);
+    bool ParseConfigFile(const std::string& path);
+    bool ParseConfigDir(const std::string& path);
 
     std::map<std::string, std::unique_ptr<SectionParser>> section_parsers_;
     std::vector<std::pair<std::string, LineCallback>> line_callbacks_;
+    size_t parse_error_count_ = 0;
 };
 
 }  // namespace init
diff --git a/init/property_service.cpp b/init/property_service.cpp
index 4172ba7..d1c427d 100644
--- a/init/property_service.cpp
+++ b/init/property_service.cpp
@@ -56,6 +56,7 @@
 #include <selinux/label.h>
 #include <selinux/selinux.h>
 
+#include "epoll.h"
 #include "init.h"
 #include "persistent_properties.h"
 #include "property_type.h"
@@ -65,7 +66,6 @@
 
 using namespace std::literals;
 
-using android::base::GetIntProperty;
 using android::base::ReadFileToString;
 using android::base::Split;
 using android::base::StartsWith;
@@ -377,6 +377,7 @@
 
             int result = TEMP_FAILURE_RETRY(recv(socket_, data, bytes_left, MSG_DONTWAIT));
             if (result <= 0) {
+                PLOG(ERROR) << "sys_prop: recv error";
                 return false;
             }
 
@@ -384,6 +385,10 @@
             data += result;
         }
 
+        if (bytes_left != 0) {
+            LOG(ERROR) << "sys_prop: recv data is not properly obtained.";
+        }
+
         return bytes_left == 0;
     }
 
@@ -837,7 +842,7 @@
     selinux_android_restorecon(kPropertyInfosPath, 0);
 }
 
-void start_property_service() {
+void StartPropertyService(Epoll* epoll) {
     selinux_callback cb;
     cb.func_audit = SelinuxAuditCallback;
     selinux_set_callback(SELINUX_CB_AUDIT, cb);
@@ -852,7 +857,9 @@
 
     listen(property_set_fd, 8);
 
-    register_epoll_handler(property_set_fd, handle_property_set_fd);
+    if (auto result = epoll->RegisterHandler(property_set_fd, handle_property_set_fd); !result) {
+        PLOG(FATAL) << result.error();
+    }
 }
 
 }  // namespace init
diff --git a/init/property_service.h b/init/property_service.h
index 897ac15..cacd987 100644
--- a/init/property_service.h
+++ b/init/property_service.h
@@ -21,6 +21,8 @@
 
 #include <string>
 
+#include "epoll.h"
+
 namespace android {
 namespace init {
 
@@ -35,7 +37,7 @@
 void property_load_boot_defaults(void);
 void load_persist_props(void);
 void load_system_props(void);
-void start_property_service(void);
+void StartPropertyService(Epoll* epoll);
 
 }  // namespace init
 }  // namespace android
diff --git a/init/reboot.cpp b/init/reboot.cpp
index 328164f..6f6e39f 100644
--- a/init/reboot.cpp
+++ b/init/reboot.cpp
@@ -458,10 +458,20 @@
         if (kill_after_apps.count(s->name())) s->Stop();
     }
     // 4. sync, try umount, and optionally run fsck for user shutdown
-    sync();
+    {
+        Timer sync_timer;
+        LOG(INFO) << "sync() before umount...";
+        sync();
+        LOG(INFO) << "sync() before umount took" << sync_timer;
+    }
     UmountStat stat = TryUmountAndFsck(runFsck, shutdown_timeout - t.duration());
     // Follow what linux shutdown is doing: one more sync with little bit delay
-    sync();
+    {
+        Timer sync_timer;
+        LOG(INFO) << "sync() after umount...";
+        sync();
+        LOG(INFO) << "sync() after umount took" << sync_timer;
+    }
     if (!is_thermal_shutdown) std::this_thread::sleep_for(100ms);
     LogShutdownTime(stat, &t);
     // Reboot regardless of umount status. If umount fails, fsck after reboot will fix it.
diff --git a/init/service.cpp b/init/service.cpp
index 37d3a88..565cae7 100644
--- a/init/service.cpp
+++ b/init/service.cpp
@@ -18,6 +18,7 @@
 
 #include <fcntl.h>
 #include <inttypes.h>
+#include <linux/input.h>
 #include <linux/securebits.h>
 #include <sched.h>
 #include <sys/mount.h>
@@ -32,6 +33,7 @@
 #include <android-base/file.h>
 #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>
@@ -46,8 +48,6 @@
 #if defined(__ANDROID__)
 #include <sys/system_properties.h>
 
-#include <android-base/properties.h>
-
 #include "init.h"
 #include "property_service.h"
 #else
@@ -183,7 +183,7 @@
     return Success();
 }
 
-static bool ExpandArgsAndExecv(const std::vector<std::string>& args) {
+static bool ExpandArgsAndExecv(const std::vector<std::string>& args, bool sigstop) {
     std::vector<std::string> expanded_args;
     std::vector<char*> c_strings;
 
@@ -197,6 +197,10 @@
     }
     c_strings.push_back(nullptr);
 
+    if (sigstop) {
+        kill(getpid(), SIGSTOP);
+    }
+
     return execv(c_strings[0], c_strings.data()) == 0;
 }
 
@@ -224,7 +228,6 @@
       seclabel_(seclabel),
       onrestart_(false, subcontext_for_restart_commands, "<Service '" + name + "' onrestart>", 0,
                  "onrestart", {}),
-      keychord_id_(0),
       ioprio_class_(IoSchedClass_NONE),
       ioprio_pri_(0),
       priority_(0),
@@ -492,8 +495,8 @@
     const std::string& interface_name = args[1];
     const std::string& instance_name = args[2];
 
-    const FQName fq_name = FQName(interface_name);
-    if (!fq_name.isValid()) {
+    FQName fq_name;
+    if (!FQName::parse(interface_name, &fq_name)) {
         return Error() << "Invalid fully-qualified name for interface '" << interface_name << "'";
     }
 
@@ -540,10 +543,13 @@
 Result<Success> Service::ParseKeycodes(const std::vector<std::string>& args) {
     for (std::size_t i = 1; i < args.size(); i++) {
         int code;
-        if (ParseInt(args[i], &code)) {
-            keycodes_.emplace_back(code);
+        if (ParseInt(args[i], &code, 0, KEY_MAX)) {
+            for (auto& key : keycodes_) {
+                if (key == code) return Error() << "duplicate keycode: " << args[i];
+            }
+            keycodes_.insert(std::upper_bound(keycodes_.begin(), keycodes_.end(), code), code);
         } else {
-            LOG(WARNING) << "ignoring invalid keycode: " << args[i];
+            return Error() << "invalid keycode: " << args[i];
         }
     }
     return Success();
@@ -624,6 +630,11 @@
     return Success();
 }
 
+Result<Success> Service::ParseSigstop(const std::vector<std::string>& args) {
+    sigstop_ = true;
+    return Success();
+}
+
 Result<Success> Service::ParseSetenv(const std::vector<std::string>& args) {
     environment_vars_.emplace_back(args[1], args[2]);
     return Success();
@@ -726,29 +737,30 @@
         {"disabled",    {0,     0,    &Service::ParseDisabled}},
         {"enter_namespace",
                         {2,     2,    &Service::ParseEnterNamespace}},
+        {"file",        {2,     2,    &Service::ParseFile}},
         {"group",       {1,     NR_SVC_SUPP_GIDS + 1, &Service::ParseGroup}},
         {"interface",   {2,     2,    &Service::ParseInterface}},
         {"ioprio",      {2,     2,    &Service::ParseIoprio}},
-        {"priority",    {1,     1,    &Service::ParsePriority}},
         {"keycodes",    {1,     kMax, &Service::ParseKeycodes}},
-        {"oneshot",     {0,     0,    &Service::ParseOneshot}},
-        {"onrestart",   {1,     kMax, &Service::ParseOnrestart}},
-        {"override",    {0,     0,    &Service::ParseOverride}},
-        {"oom_score_adjust",
-                        {1,     1,    &Service::ParseOomScoreAdjust}},
-        {"memcg.swappiness",
-                        {1,     1,    &Service::ParseMemcgSwappiness}},
-        {"memcg.soft_limit_in_bytes",
-                        {1,     1,    &Service::ParseMemcgSoftLimitInBytes}},
         {"memcg.limit_in_bytes",
                         {1,     1,    &Service::ParseMemcgLimitInBytes}},
+        {"memcg.soft_limit_in_bytes",
+                        {1,     1,    &Service::ParseMemcgSoftLimitInBytes}},
+        {"memcg.swappiness",
+                        {1,     1,    &Service::ParseMemcgSwappiness}},
         {"namespace",   {1,     2,    &Service::ParseNamespace}},
+        {"oneshot",     {0,     0,    &Service::ParseOneshot}},
+        {"onrestart",   {1,     kMax, &Service::ParseOnrestart}},
+        {"oom_score_adjust",
+                        {1,     1,    &Service::ParseOomScoreAdjust}},
+        {"override",    {0,     0,    &Service::ParseOverride}},
+        {"priority",    {1,     1,    &Service::ParsePriority}},
         {"rlimit",      {3,     3,    &Service::ParseProcessRlimit}},
         {"seclabel",    {1,     1,    &Service::ParseSeclabel}},
         {"setenv",      {2,     2,    &Service::ParseSetenv}},
         {"shutdown",    {1,     1,    &Service::ParseShutdown}},
+        {"sigstop",     {0,     0,    &Service::ParseSigstop}},
         {"socket",      {3,     6,    &Service::ParseSocket}},
-        {"file",        {2,     2,    &Service::ParseFile}},
         {"user",        {1,     1,    &Service::ParseUser}},
         {"writepid",    {1,     kMax, &Service::ParseWritepid}},
     };
@@ -920,7 +932,7 @@
         // priority. Aborts on failure.
         SetProcessAttributes();
 
-        if (!ExpandArgsAndExecv(args_)) {
+        if (!ExpandArgsAndExecv(args_, sigstop_)) {
             PLOG(ERROR) << "cannot execve('" << args_[0] << "')";
         }
 
diff --git a/init/service.h b/init/service.h
index 87c9ac8..ea79a07 100644
--- a/init/service.h
+++ b/init/service.h
@@ -108,8 +108,6 @@
     const std::vector<gid_t>& supp_gids() const { return supp_gids_; }
     const std::string& seclabel() const { return seclabel_; }
     const std::vector<int>& keycodes() const { return keycodes_; }
-    int keychord_id() const { return keychord_id_; }
-    void set_keychord_id(int keychord_id) { keychord_id_ = keychord_id; }
     IoSchedClass ioprio_class() const { return ioprio_class_; }
     int ioprio_pri() const { return ioprio_pri_; }
     const std::set<std::string>& interfaces() const { return interfaces_; }
@@ -118,6 +116,7 @@
     bool is_override() const { return override_; }
     bool process_cgroup_empty() const { return process_cgroup_empty_; }
     unsigned long start_order() const { return start_order_; }
+    void set_sigstop(bool value) { sigstop_ = value; }
     const std::vector<std::string>& args() const { return args_; }
 
   private:
@@ -157,6 +156,7 @@
     Result<Success> ParseSeclabel(const std::vector<std::string>& args);
     Result<Success> ParseSetenv(const std::vector<std::string>& args);
     Result<Success> ParseShutdown(const std::vector<std::string>& args);
+    Result<Success> ParseSigstop(const std::vector<std::string>& args);
     Result<Success> ParseSocket(const std::vector<std::string>& args);
     Result<Success> ParseFile(const std::vector<std::string>& args);
     Result<Success> ParseUser(const std::vector<std::string>& args);
@@ -197,9 +197,8 @@
 
     std::set<std::string> interfaces_;  // e.g. some.package.foo@1.0::IBaz/instance-name
 
-    // keycodes for triggering this service via /dev/keychord
+    // keycodes for triggering this service via /dev/input/input*
     std::vector<int> keycodes_;
-    int keychord_id_;
 
     IoSchedClass ioprio_class_;
     int ioprio_pri_;
@@ -219,6 +218,8 @@
 
     std::vector<std::pair<int, rlimit>> rlimits_;
 
+    bool sigstop_ = false;
+
     std::vector<std::string> args_;
 
     std::vector<std::function<void(const siginfo_t& siginfo)>> reap_callbacks_;
@@ -246,6 +247,16 @@
         return nullptr;
     }
 
+    Service* FindInterface(const std::string& interface_name) {
+        for (const auto& svc : services_) {
+            if (svc->interfaces().count(interface_name) > 0) {
+                return svc.get();
+            }
+        }
+
+        return nullptr;
+    }
+
     void DumpState() const;
 
     auto begin() const { return services_.begin(); }
diff --git a/init/service_test.cpp b/init/service_test.cpp
index b43c2e9..194aa2b 100644
--- a/init/service_test.cpp
+++ b/init/service_test.cpp
@@ -46,7 +46,6 @@
     EXPECT_EQ(0U, service_in_old_memory->uid());
     EXPECT_EQ(0U, service_in_old_memory->gid());
     EXPECT_EQ(0U, service_in_old_memory->namespace_flags());
-    EXPECT_EQ(0, service_in_old_memory->keychord_id());
     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());
@@ -66,7 +65,6 @@
     EXPECT_EQ(0U, service_in_old_memory2->uid());
     EXPECT_EQ(0U, service_in_old_memory2->gid());
     EXPECT_EQ(0U, service_in_old_memory2->namespace_flags());
-    EXPECT_EQ(0, service_in_old_memory2->keychord_id());
     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());
diff --git a/init/sigchld_handler.cpp b/init/sigchld_handler.cpp
index badacaf..0b03324 100644
--- a/init/sigchld_handler.cpp
+++ b/init/sigchld_handler.cpp
@@ -39,9 +39,6 @@
 namespace android {
 namespace init {
 
-static int signal_write_fd = -1;
-static int signal_read_fd = -1;
-
 static bool ReapOneProcess() {
     siginfo_t siginfo = {};
     // This returns a zombie pid or informs us that there are no zombies left to be reaped.
@@ -101,46 +98,10 @@
     return true;
 }
 
-static void handle_signal() {
-    // Clear outstanding requests.
-    char buf[32];
-    read(signal_read_fd, buf, sizeof(buf));
-
-    ReapAnyOutstandingChildren();
-}
-
-static void SIGCHLD_handler(int) {
-    if (TEMP_FAILURE_RETRY(write(signal_write_fd, "1", 1)) == -1) {
-        PLOG(ERROR) << "write(signal_write_fd) failed";
-    }
-}
-
 void ReapAnyOutstandingChildren() {
     while (ReapOneProcess()) {
     }
 }
 
-void sigchld_handler_init() {
-    // Create a signalling mechanism for SIGCHLD.
-    int s[2];
-    if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK | SOCK_CLOEXEC, 0, s) == -1) {
-        PLOG(FATAL) << "socketpair failed in sigchld_handler_init";
-    }
-
-    signal_write_fd = s[0];
-    signal_read_fd = s[1];
-
-    // Write to signal_write_fd if we catch SIGCHLD.
-    struct sigaction act;
-    memset(&act, 0, sizeof(act));
-    act.sa_handler = SIGCHLD_handler;
-    act.sa_flags = SA_NOCLDSTOP;
-    sigaction(SIGCHLD, &act, 0);
-
-    ReapAnyOutstandingChildren();
-
-    register_epoll_handler(signal_read_fd, handle_signal);
-}
-
 }  // namespace init
 }  // namespace android
diff --git a/init/sigchld_handler.h b/init/sigchld_handler.h
index c86dc8d..30063f2 100644
--- a/init/sigchld_handler.h
+++ b/init/sigchld_handler.h
@@ -22,8 +22,6 @@
 
 void ReapAnyOutstandingChildren();
 
-void sigchld_handler_init(void);
-
 }  // namespace init
 }  // namespace android
 
diff --git a/init/subcontext.cpp b/init/subcontext.cpp
index fdb4641..267d530 100644
--- a/init/subcontext.cpp
+++ b/init/subcontext.cpp
@@ -30,8 +30,6 @@
 #include "util.h"
 
 #if defined(__ANDROID__)
-#include <android-base/properties.h>
-
 #include "property_service.h"
 #include "selinux.h"
 #else
@@ -39,7 +37,6 @@
 #endif
 
 using android::base::GetExecutablePath;
-using android::base::GetIntProperty;
 using android::base::Join;
 using android::base::Socketpair;
 using android::base::Split;
diff --git a/init/util.cpp b/init/util.cpp
index 4455b2e..5f2b87d 100644
--- a/init/util.cpp
+++ b/init/util.cpp
@@ -33,6 +33,7 @@
 
 #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>
@@ -43,8 +44,6 @@
 #include "reboot.h"
 
 #if defined(__ANDROID__)
-#include <android-base/properties.h>
-
 #include "selinux.h"
 #else
 #include "host_init_stubs.h"
diff --git a/libasyncio/Android.bp b/libasyncio/Android.bp
index 8a2afea..4ab439d 100644
--- a/libasyncio/Android.bp
+++ b/libasyncio/Android.bp
@@ -27,6 +27,7 @@
     name: "libasyncio",
     defaults: ["libasyncio_defaults"],
     vendor_available: true,
+    recovery_available: true,
     host_supported: true,
     srcs: [
         "AsyncIO.cpp",
diff --git a/libasyncio/AsyncIO.cpp b/libasyncio/AsyncIO.cpp
index 7430bc8..6149f09 100644
--- a/libasyncio/AsyncIO.cpp
+++ b/libasyncio/AsyncIO.cpp
@@ -17,9 +17,10 @@
 #include <asyncio/AsyncIO.h>
 #include <sys/syscall.h>
 #include <unistd.h>
+#include <cstdint>
+#include <cstring>
 
 int io_setup(unsigned nr, aio_context_t* ctxp) {
-    memset(ctxp, 0, sizeof(*ctxp));
     return syscall(__NR_io_setup, nr, ctxp);
 }
 
@@ -48,3 +49,11 @@
     iocb->aio_nbytes = count;
     iocb->aio_offset = offset;
 }
+
+void io_prep_pread(struct iocb* iocb, int fd, void* buf, size_t count, long long offset) {
+    io_prep(iocb, fd, buf, count, offset, true);
+}
+
+void io_prep_pwrite(struct iocb* iocb, int fd, void* buf, size_t count, long long offset) {
+    io_prep(iocb, fd, buf, count, offset, false);
+}
diff --git a/libasyncio/include/asyncio/AsyncIO.h b/libasyncio/include/asyncio/AsyncIO.h
index e3fb93a..9620d2a 100644
--- a/libasyncio/include/asyncio/AsyncIO.h
+++ b/libasyncio/include/asyncio/AsyncIO.h
@@ -17,9 +17,9 @@
 #ifndef _ASYNCIO_H
 #define _ASYNCIO_H
 
-#include <cstring>
-#include <cstdint>
 #include <linux/aio_abi.h>
+#include <stdbool.h>
+#include <stdint.h>
 #include <sys/cdefs.h>
 #include <sys/types.h>
 #include <time.h>
@@ -35,10 +35,14 @@
 
 int io_setup(unsigned nr, aio_context_t* ctxp);
 int io_destroy(aio_context_t ctx);
-int io_submit(aio_context_t ctx, long nr, iocb** iocbpp);
-int io_getevents(aio_context_t ctx, long min_nr, long max_nr, io_event* events, timespec* timeout);
-int io_cancel(aio_context_t ctx, iocb*, io_event* result);
-void io_prep(iocb* iocb, int fd, const void* buf, uint64_t count, int64_t offset, bool read);
+int io_submit(aio_context_t ctx, long nr, struct iocb** iocbpp);
+int io_getevents(aio_context_t ctx, long min_nr, long max_nr, struct io_event* events,
+                 struct timespec* timeout);
+int io_cancel(aio_context_t ctx, struct iocb*, struct io_event* result);
+
+void io_prep_pread(struct iocb* iocb, int fd, void* buf, size_t count, long long offset);
+void io_prep_pwrite(struct iocb* iocb, int fd, void* buf, size_t count, long long offset);
+void io_prep(struct iocb* iocb, int fd, const void* buf, uint64_t count, int64_t offset, bool read);
 
 #ifdef __cplusplus
 };
diff --git a/libbacktrace/Android.bp b/libbacktrace/Android.bp
index 4bd01d2..b4bf35f 100644
--- a/libbacktrace/Android.bp
+++ b/libbacktrace/Android.bp
@@ -22,11 +22,6 @@
         "-Werror",
     ],
 
-    // The latest clang (r230699) does not allow SP/PC to be declared in inline asm lists.
-    clang_cflags: ["-Wno-inline-asm"],
-
-    include_dirs: ["external/libunwind/include/tdep"],
-
     target: {
         darwin: {
             enabled: false,
@@ -56,12 +51,14 @@
 cc_library_headers {
     name: "libbacktrace_headers",
     vendor_available: true,
+    recovery_available: true,
     export_include_dirs: ["include"],
 }
 
 cc_library {
     name: "libbacktrace",
     vendor_available: false,
+    recovery_available: true,
     vndk: {
         enabled: true,
         support_system_process: true,
@@ -92,20 +89,20 @@
             shared_libs: [
                 "libbase",
                 "liblog",
-                "libunwind",
                 "libunwindstack",
                 "libdexfile",
             ],
 
-            static_libs: ["libcutils"],
+            static_libs: [
+                "libcutils",
+                "libprocinfo",
+            ],
 
             // libdexfile will eventually properly export headers, for now
             // include these directly.
             include_dirs: [
                 "art/runtime",
             ],
-
-            header_libs: ["jni_headers"],
         },
         android: {
             static_libs: ["libasync_safe"],
@@ -114,6 +111,10 @@
             cflags: ["-DNO_LIBDEXFILE_SUPPORT"],
             exclude_shared_libs: ["libdexfile"],
         },
+        recovery: {
+            cflags: ["-DNO_LIBDEXFILE_SUPPORT"],
+            exclude_shared_libs: ["libdexfile"],
+        },
     },
     whole_static_libs: ["libdemangle"],
 }
@@ -183,12 +184,16 @@
         "art/runtime",
     ],
 
+    test_suites: ["device-tests"],
     data: [
         "testdata/arm/*",
         "testdata/arm64/*",
         "testdata/x86/*",
         "testdata/x86_64/*",
     ],
+    required: [
+        "libbacktrace_test",
+    ],
 }
 
 cc_benchmark {
diff --git a/libbacktrace/BacktraceMap.cpp b/libbacktrace/BacktraceMap.cpp
index bdae140..399721d 100644
--- a/libbacktrace/BacktraceMap.cpp
+++ b/libbacktrace/BacktraceMap.cpp
@@ -28,6 +28,9 @@
 #include <backtrace/Backtrace.h>
 #include <backtrace/BacktraceMap.h>
 #include <backtrace/backtrace_constants.h>
+#if defined(__linux__)
+#include <procinfo/process_map.h>
+#endif
 
 #include "thread_utils.h"
 
@@ -60,27 +63,19 @@
   *map = {};
 }
 
-bool BacktraceMap::ParseLine(const char* line, backtrace_map_t* map) {
+#if defined(__APPLE__)
+static bool ParseLine(const char* line, backtrace_map_t* map) {
   uint64_t start;
   uint64_t end;
   char permissions[5];
   int name_pos;
 
-#if defined(__APPLE__)
 // Mac OS vmmap(1) output:
 // __TEXT                 0009f000-000a1000 [    8K     8K] r-x/rwx SM=COW  /Volumes/android/dalvik-dev/out/host/darwin-x86/bin/libcorkscrew_test\n
 // 012345678901234567890123456789012345678901234567890123456789
 // 0         1         2         3         4         5
   if (sscanf(line, "%*21c %" SCNx64 "-%" SCNx64 " [%*13c] %3c/%*3c SM=%*3c  %n",
              &start, &end, permissions, &name_pos) != 3) {
-#else
-// Linux /proc/<pid>/maps lines:
-// 6f000000-6f01e000 rwxp 00000000 00:0c 16389419   /system/lib/libcomposer.so\n
-// 012345678901234567890123456789012345678901234567890123456789
-// 0         1         2         3         4         5
-  if (sscanf(line, "%" SCNx64 "-%" SCNx64 " %4s %*x %*x:%*x %*d %n",
-             &start, &end, permissions, &name_pos) != 3) {
-#endif
     return false;
   }
 
@@ -107,24 +102,15 @@
         map->flags, map->name.c_str());
   return true;
 }
+#endif  // defined(__APPLE__)
 
 bool BacktraceMap::Build() {
 #if defined(__APPLE__)
   char cmd[sizeof(pid_t)*3 + sizeof("vmmap -w -resident -submap -allSplitLibs -interleaved ") + 1];
-#else
-  char path[sizeof(pid_t)*3 + sizeof("/proc//maps") + 1];
-#endif
   char line[1024];
-
-#if defined(__APPLE__)
   // cmd is guaranteed to always be big enough to hold this string.
   snprintf(cmd, sizeof(cmd), "vmmap -w -resident -submap -allSplitLibs -interleaved %d", pid_);
   FILE* fp = popen(cmd, "r");
-#else
-  // path is guaranteed to always be big enough to hold this string.
-  snprintf(path, sizeof(path), "/proc/%d/maps", pid_);
-  FILE* fp = fopen(path, "r");
-#endif
   if (fp == nullptr) {
     return false;
   }
@@ -135,13 +121,19 @@
       maps_.push_back(map);
     }
   }
-#if defined(__APPLE__)
   pclose(fp);
-#else
-  fclose(fp);
-#endif
-
   return true;
+#else
+  return android::procinfo::ReadProcessMaps(
+      pid_, [&](uint64_t start, uint64_t end, uint16_t flags, uint64_t, const char* name) {
+        maps_.resize(maps_.size() + 1);
+        backtrace_map_t& map = maps_.back();
+        map.start = start;
+        map.end = end;
+        map.flags = flags;
+        map.name = name;
+      });
+#endif
 }
 
 #if defined(__APPLE__)
diff --git a/libbacktrace/backtrace_test.cpp b/libbacktrace/backtrace_test.cpp
index 1e3d379..f78a31f 100644
--- a/libbacktrace/backtrace_test.cpp
+++ b/libbacktrace/backtrace_test.cpp
@@ -46,6 +46,7 @@
 
 #include <android-base/macros.h>
 #include <android-base/stringprintf.h>
+#include <android-base/test_utils.h>
 #include <android-base/unique_fd.h>
 #include <cutils/atomic.h>
 #include <cutils/threads.h>
@@ -1186,49 +1187,45 @@
   ASSERT_TRUE(expected_functions.empty()) << "Not all functions found in shared library.";
 }
 
-static const char* CopySharedLibrary() {
-#if defined(__LP64__)
-  const char* lib_name = "lib64";
-#else
-  const char* lib_name = "lib";
-#endif
+static void CopySharedLibrary(const char* tmp_dir, std::string* tmp_so_name) {
+  std::string system_dir;
 
 #if defined(__BIONIC__)
-  const char* tmp_so_name = "/data/local/tmp/libbacktrace_test.so";
-  std::string cp_cmd = android::base::StringPrintf("cp /system/%s/libbacktrace_test.so %s",
-                                                   lib_name, tmp_so_name);
+  system_dir = "/system/lib";
 #else
-  const char* tmp_so_name = "/tmp/libbacktrace_test.so";
-  if (getenv("ANDROID_HOST_OUT") == NULL) {
-    fprintf(stderr, "ANDROID_HOST_OUT not set, make sure you run lunch.");
-    return nullptr;
-  }
-  std::string cp_cmd = android::base::StringPrintf("cp %s/%s/libbacktrace_test.so %s",
-                                                   getenv("ANDROID_HOST_OUT"), lib_name,
-                                                   tmp_so_name);
+  const char* host_out_env = getenv("ANDROID_HOST_OUT");
+  ASSERT_TRUE(host_out_env != nullptr);
+  system_dir = std::string(host_out_env) + "/lib";
 #endif
 
-  // Copy the shared so to a tempory directory.
-  system(cp_cmd.c_str());
+#if defined(__LP64__)
+  system_dir += "64";
+#endif
 
-  return tmp_so_name;
+  *tmp_so_name = std::string(tmp_dir) + "/libbacktrace_test.so";
+  std::string cp_cmd =
+      android::base::StringPrintf("cp %s/libbacktrace_test.so %s", system_dir.c_str(), tmp_dir);
+
+  // Copy the shared so to a tempory directory.
+  ASSERT_EQ(0, system(cp_cmd.c_str()));
 }
 
 TEST(libbacktrace, check_unreadable_elf_local) {
-  const char* tmp_so_name = CopySharedLibrary();
-  ASSERT_TRUE(tmp_so_name != nullptr);
+  TemporaryDir td;
+  std::string tmp_so_name;
+  ASSERT_NO_FATAL_FAILURE(CopySharedLibrary(td.path, &tmp_so_name));
 
   struct stat buf;
-  ASSERT_TRUE(stat(tmp_so_name, &buf) != -1);
+  ASSERT_TRUE(stat(tmp_so_name.c_str(), &buf) != -1);
   uint64_t map_size = buf.st_size;
 
-  int fd = open(tmp_so_name, O_RDONLY);
+  int fd = open(tmp_so_name.c_str(), O_RDONLY);
   ASSERT_TRUE(fd != -1);
 
   void* map = mmap(nullptr, map_size, PROT_READ | PROT_EXEC, MAP_PRIVATE, fd, 0);
   ASSERT_TRUE(map != MAP_FAILED);
   close(fd);
-  ASSERT_TRUE(unlink(tmp_so_name) != -1);
+  ASSERT_TRUE(unlink(tmp_so_name.c_str()) != -1);
 
   std::vector<std::string> found_functions;
   std::unique_ptr<Backtrace> backtrace(Backtrace::Create(BACKTRACE_CURRENT_PROCESS,
@@ -1256,32 +1253,33 @@
 }
 
 TEST(libbacktrace, check_unreadable_elf_remote) {
-  const char* tmp_so_name = CopySharedLibrary();
-  ASSERT_TRUE(tmp_so_name != nullptr);
+  TemporaryDir td;
+  std::string tmp_so_name;
+  ASSERT_NO_FATAL_FAILURE(CopySharedLibrary(td.path, &tmp_so_name));
 
   g_ready = 0;
 
   struct stat buf;
-  ASSERT_TRUE(stat(tmp_so_name, &buf) != -1);
+  ASSERT_TRUE(stat(tmp_so_name.c_str(), &buf) != -1);
   uint64_t map_size = buf.st_size;
 
   pid_t pid;
   if ((pid = fork()) == 0) {
-    int fd = open(tmp_so_name, O_RDONLY);
+    int fd = open(tmp_so_name.c_str(), O_RDONLY);
     if (fd == -1) {
-      fprintf(stderr, "Failed to open file %s: %s\n", tmp_so_name, strerror(errno));
-      unlink(tmp_so_name);
+      fprintf(stderr, "Failed to open file %s: %s\n", tmp_so_name.c_str(), strerror(errno));
+      unlink(tmp_so_name.c_str());
       exit(0);
     }
 
     void* map = mmap(nullptr, map_size, PROT_READ | PROT_EXEC, MAP_PRIVATE, fd, 0);
     if (map == MAP_FAILED) {
       fprintf(stderr, "Failed to map in memory: %s\n", strerror(errno));
-      unlink(tmp_so_name);
+      unlink(tmp_so_name.c_str());
       exit(0);
     }
     close(fd);
-    if (unlink(tmp_so_name) == -1) {
+    if (unlink(tmp_so_name.c_str()) == -1) {
       fprintf(stderr, "Failed to unlink: %s\n", strerror(errno));
       exit(0);
     }
@@ -1394,11 +1392,13 @@
 typedef int (*test_func_t)(int, int, int, int, void (*)(void*), void*);
 
 TEST(libbacktrace, unwind_through_unreadable_elf_local) {
-  const char* tmp_so_name = CopySharedLibrary();
-  ASSERT_TRUE(tmp_so_name != nullptr);
-  void* lib_handle = dlopen(tmp_so_name, RTLD_NOW);
+  TemporaryDir td;
+  std::string tmp_so_name;
+  ASSERT_NO_FATAL_FAILURE(CopySharedLibrary(td.path, &tmp_so_name));
+
+  void* lib_handle = dlopen(tmp_so_name.c_str(), RTLD_NOW);
   ASSERT_TRUE(lib_handle != nullptr);
-  ASSERT_TRUE(unlink(tmp_so_name) != -1);
+  ASSERT_TRUE(unlink(tmp_so_name.c_str()) != -1);
 
   test_func_t test_func;
   test_func = reinterpret_cast<test_func_t>(dlsym(lib_handle, "test_level_one"));
@@ -1411,11 +1411,13 @@
 }
 
 TEST(libbacktrace, unwind_through_unreadable_elf_remote) {
-  const char* tmp_so_name = CopySharedLibrary();
-  ASSERT_TRUE(tmp_so_name != nullptr);
-  void* lib_handle = dlopen(tmp_so_name, RTLD_NOW);
+  TemporaryDir td;
+  std::string tmp_so_name;
+  ASSERT_NO_FATAL_FAILURE(CopySharedLibrary(td.path, &tmp_so_name));
+
+  void* lib_handle = dlopen(tmp_so_name.c_str(), RTLD_NOW);
   ASSERT_TRUE(lib_handle != nullptr);
-  ASSERT_TRUE(unlink(tmp_so_name) != -1);
+  ASSERT_TRUE(unlink(tmp_so_name.c_str()) != -1);
 
   test_func_t test_func;
   test_func = reinterpret_cast<test_func_t>(dlsym(lib_handle, "test_level_one"));
@@ -1444,7 +1446,8 @@
 
     size_t frame_num;
     if (FindFuncFrameInBacktrace(backtrace.get(), reinterpret_cast<uint64_t>(test_func),
-                                 &frame_num)) {
+                                 &frame_num) &&
+        frame_num != 0) {
       VerifyUnreadableElfFrame(backtrace.get(), reinterpret_cast<uint64_t>(test_func), frame_num);
       done = true;
     }
diff --git a/libbacktrace/include/backtrace/BacktraceMap.h b/libbacktrace/include/backtrace/BacktraceMap.h
index 473d195..a9cfce4 100644
--- a/libbacktrace/include/backtrace/BacktraceMap.h
+++ b/libbacktrace/include/backtrace/BacktraceMap.h
@@ -40,6 +40,10 @@
 // Special flag to indicate a map is in /dev/. However, a map in
 // /dev/ashmem/... does not set this flag.
 static constexpr int PROT_DEVICE_MAP = 0x8000;
+// Special flag to indicate that this map represents an elf file
+// created by ART for use with the gdb jit debug interface.
+// This should only ever appear in offline maps data.
+static constexpr int PROT_JIT_SYMFILE_MAP = 0x4000;
 
 struct backtrace_map_t {
   uint64_t start = 0;
@@ -165,8 +169,6 @@
 
   virtual uint64_t GetLoadBias(size_t /* index */) { return 0; }
 
-  virtual bool ParseLine(const char* line, backtrace_map_t* map);
-
   pid_t pid_;
   std::deque<backtrace_map_t> maps_;
   std::vector<std::string> suffixes_to_ignore_;
diff --git a/libbinderwrapper/Android.bp b/libbinderwrapper/Android.bp
index 6fac0d8..d2487e2 100644
--- a/libbinderwrapper/Android.bp
+++ b/libbinderwrapper/Android.bp
@@ -38,6 +38,7 @@
 cc_library_shared {
     name: "libbinderwrapper",
     defaults: ["libbinderwrapper_defaults"],
+    vendor_available: true,
 
     srcs: [
         "binder_wrapper.cc",
diff --git a/libcrypto_utils/Android.bp b/libcrypto_utils/Android.bp
index 47de12a..e47560f 100644
--- a/libcrypto_utils/Android.bp
+++ b/libcrypto_utils/Android.bp
@@ -17,6 +17,7 @@
 cc_library {
     name: "libcrypto_utils",
     vendor_available: true,
+    recovery_available: true,
     vndk: {
         enabled: true,
     },
diff --git a/libcutils/Android.bp b/libcutils/Android.bp
index bcc9b1c..cdbb65f 100644
--- a/libcutils/Android.bp
+++ b/libcutils/Android.bp
@@ -32,6 +32,7 @@
 cc_library_headers {
     name: "libcutils_headers",
     vendor_available: true,
+    recovery_available: true,
     host_supported: true,
     export_include_dirs: ["include"],
     target: {
@@ -54,6 +55,7 @@
         enabled: true,
         support_system_process: true,
     },
+    recovery_available: true,
     host_supported: true,
     srcs: [
         "config_utils.cpp",
@@ -173,6 +175,7 @@
 
     shared_libs: ["liblog"],
     header_libs: [
+        "libbase_headers",
         "libcutils_headers",
         "libutils_headers",
     ],
diff --git a/libcutils/OWNERS b/libcutils/OWNERS
new file mode 100644
index 0000000..c18ed51
--- /dev/null
+++ b/libcutils/OWNERS
@@ -0,0 +1,4 @@
+cferris@google.com
+enh@google.com
+jmgao@google.com
+tomcherry@google.com
diff --git a/libcutils/ashmem-host.cpp b/libcutils/ashmem-host.cpp
index b2bec99..bb990d5 100644
--- a/libcutils/ashmem-host.cpp
+++ b/libcutils/ashmem-host.cpp
@@ -24,7 +24,6 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/libcutils/canned_fs_config.cpp b/libcutils/canned_fs_config.cpp
index 6b5763b..2772ef0 100644
--- a/libcutils/canned_fs_config.cpp
+++ b/libcutils/canned_fs_config.cpp
@@ -21,7 +21,6 @@
 #include <errno.h>
 #include <inttypes.h>
 #include <limits.h>
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/libcutils/fs_config.cpp b/libcutils/fs_config.cpp
index 5b79b1d..ade963b 100644
--- a/libcutils/fs_config.cpp
+++ b/libcutils/fs_config.cpp
@@ -154,6 +154,7 @@
     { 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" },
     { 00600, AID_ROOT,      AID_ROOT,      0, "system/build.prop" },
@@ -179,12 +180,6 @@
     // in user builds.
     { 00700, AID_SYSTEM,    AID_SHELL,     CAP_MASK_LONG(CAP_BLOCK_SUSPEND),
                                               "system/bin/inputflinger" },
-    { 00550, AID_LOGD,      AID_LOGD,      CAP_MASK_LONG(CAP_SYSLOG) |
-                                           CAP_MASK_LONG(CAP_AUDIT_CONTROL) |
-                                           CAP_MASK_LONG(CAP_SETGID),
-                                              "system/bin/logd" },
-    { 00550, AID_SYSTEM,    AID_LOG,      CAP_MASK_LONG(CAP_SYSLOG),
-                                              "system/bin/bootstat" },
     { 00750, AID_ROOT,      AID_SHELL,     CAP_MASK_LONG(CAP_SETUID) |
                                            CAP_MASK_LONG(CAP_SETGID),
                                               "system/bin/run-as" },
diff --git a/libcutils/hashmap.cpp b/libcutils/hashmap.cpp
index 65b6ab1..10e3b25 100644
--- a/libcutils/hashmap.cpp
+++ b/libcutils/hashmap.cpp
@@ -21,7 +21,6 @@
 #include <cutils/threads.h>
 #include <stdlib.h>
 #include <string.h>
-#include <stdbool.h>
 #include <sys/types.h>
 
 typedef struct Entry Entry;
diff --git a/libcutils/include/cutils/trace.h b/libcutils/include/cutils/trace.h
index bbb150d..58b9f09 100644
--- a/libcutils/include/cutils/trace.h
+++ b/libcutils/include/cutils/trace.h
@@ -74,7 +74,8 @@
 #define ATRACE_TAG_ADB              (1<<22)
 #define ATRACE_TAG_VIBRATOR         (1<<23)
 #define ATRACE_TAG_AIDL             (1<<24)
-#define ATRACE_TAG_LAST             ATRACE_TAG_AIDL
+#define ATRACE_TAG_NNAPI            (1<<25)
+#define ATRACE_TAG_LAST             ATRACE_TAG_NNAPI
 
 // Reserved for initialization.
 #define ATRACE_TAG_NOT_READY        (1ULL<<63)
diff --git a/libcutils/include/private/android_filesystem_config.h b/libcutils/include/private/android_filesystem_config.h
index 5d17698..3be8ad0 100644
--- a/libcutils/include/private/android_filesystem_config.h
+++ b/libcutils/include/private/android_filesystem_config.h
@@ -129,6 +129,8 @@
 #define AID_STATSD 1066          /* statsd daemon */
 #define AID_INCIDENTD 1067       /* incidentd daemon */
 #define AID_SECURE_ELEMENT 1068  /* secure element subsystem */
+#define AID_LMKD 1069            /* low memory killer daemon */
+#define AID_LLKD 1070            /* live lock daemon */
 /* 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/sched_policy.cpp b/libcutils/sched_policy.cpp
index f72ec52..3fa548f 100644
--- a/libcutils/sched_policy.cpp
+++ b/libcutils/sched_policy.cpp
@@ -25,6 +25,7 @@
 #include <string.h>
 #include <unistd.h>
 
+#include <android-base/macros.h>
 #include <log/log.h>
 
 /* Re-map SP_DEFAULT to the system default policy, and leave other values unchanged.
@@ -460,16 +461,16 @@
 
 #endif
 
-const char *get_sched_policy_name(SchedPolicy policy)
-{
+const char* get_sched_policy_name(SchedPolicy policy) {
     policy = _policy(policy);
-    static const char* const strings[SP_CNT] = {
+    static const char* const kSchedPolicyNames[] = {
             [SP_BACKGROUND] = "bg", [SP_FOREGROUND] = "fg", [SP_SYSTEM] = "  ",
             [SP_AUDIO_APP] = "aa",  [SP_AUDIO_SYS] = "as",  [SP_TOP_APP] = "ta",
             [SP_RT_APP] = "rt",     [SP_RESTRICTED] = "rs",
     };
-    if ((policy < SP_CNT) && (strings[policy] != NULL))
-        return strings[policy];
-    else
+    static_assert(arraysize(kSchedPolicyNames) == SP_CNT, "missing name");
+    if (policy < SP_BACKGROUND || policy >= SP_CNT) {
         return "error";
+    }
+    return kSchedPolicyNames[policy];
 }
diff --git a/libcutils/tests/sched_policy_test.cpp b/libcutils/tests/sched_policy_test.cpp
index 173174a..5942ee5 100644
--- a/libcutils/tests/sched_policy_test.cpp
+++ b/libcutils/tests/sched_policy_test.cpp
@@ -60,6 +60,12 @@
     return sleepTimes[median];
 }
 
+static void AssertPolicy(SchedPolicy expected_policy) {
+    SchedPolicy current_policy;
+    ASSERT_EQ(0, get_sched_policy(0, &current_policy));
+    EXPECT_EQ(expected_policy, current_policy);
+}
+
 TEST(SchedPolicy, set_sched_policy) {
     if (!hasCapSysNice()) {
         GTEST_LOG_(INFO) << "skipping test that requires CAP_SYS_NICE";
@@ -76,23 +82,17 @@
     const unsigned int BG_FG_SLACK_FACTOR = 100;
 
     ASSERT_EQ(0, set_sched_policy(0, SP_BACKGROUND));
+    AssertPolicy(SP_BACKGROUND);
     auto bgSleepTime = medianSleepTime();
 
     ASSERT_EQ(0, set_sched_policy(0, SP_FOREGROUND));
+    AssertPolicy(SP_FOREGROUND);
     auto fgSleepTime = medianSleepTime();
     ASSERT_GT(bgSleepTime, fgSleepTime * BG_FG_SLACK_FACTOR);
 }
 
-TEST(SchedPolicy, get_sched_policy) {
-    SchedPolicy policy;
-    ASSERT_EQ(0, get_sched_policy(0, &policy));
-
-    const char *policyName = get_sched_policy_name(policy);
-    EXPECT_NE(nullptr, policyName);
-    EXPECT_STRNE("error", policyName);
-
-    ASSERT_EQ(0, set_sched_policy(0, SP_BACKGROUND));
-    SchedPolicy newPolicy;
-    ASSERT_EQ(0, get_sched_policy(0, &newPolicy));
-    EXPECT_EQ(SP_BACKGROUND, newPolicy);
+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));
 }
diff --git a/libcutils/trace-dev.inc b/libcutils/trace-dev.inc
index f95c6c5..c9580af 100644
--- a/libcutils/trace-dev.inc
+++ b/libcutils/trace-dev.inc
@@ -24,7 +24,6 @@
 #include <limits.h>
 #include <pthread.h>
 #include <stdatomic.h>
-#include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/types.h>
diff --git a/libion/ion.c b/libion/ion.c
index 5836128..b8de5a4 100644
--- a/libion/ion.c
+++ b/libion/ion.c
@@ -55,7 +55,7 @@
 
 int ion_open() {
     int fd = open("/dev/ion", O_RDONLY | O_CLOEXEC);
-    if (fd < 0) ALOGE("open /dev/ion failed!\n");
+    if (fd < 0) ALOGE("open /dev/ion failed: %s", strerror(errno));
 
     return fd;
 }
@@ -69,7 +69,7 @@
 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\n", req, ret, strerror(errno));
+        ALOGE("ioctl %x failed with code %d: %s", req, ret, strerror(errno));
         return -errno;
     }
     return ret;
@@ -115,12 +115,12 @@
     ret = ion_ioctl(fd, ION_IOC_MAP, &data);
     if (ret < 0) return ret;
     if (data.fd < 0) {
-        ALOGE("map ioctl returned negative fd\n");
+        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\n", strerror(errno));
+        ALOGE("mmap failed: %s", strerror(errno));
         return -errno;
     }
     *map_fd = data.fd;
@@ -140,7 +140,7 @@
     ret = ion_ioctl(fd, ION_IOC_SHARE, &data);
     if (ret < 0) return ret;
     if (data.fd < 0) {
-        ALOGE("share ioctl returned negative fd\n");
+        ALOGE("share ioctl returned negative fd");
         return -EINVAL;
     }
     *share_fd = data.fd;
diff --git a/libkeyutils/Android.bp b/libkeyutils/Android.bp
index 0285259..b388e95 100644
--- a/libkeyutils/Android.bp
+++ b/libkeyutils/Android.bp
@@ -2,6 +2,7 @@
     name: "libkeyutils",
     cflags: ["-Werror"],
     defaults: ["linux_bionic_supported"],
+    recovery_available: true,
     export_include_dirs: ["include/"],
     local_include_dirs: ["include/"],
     srcs: ["keyutils.cpp"],
@@ -13,4 +14,5 @@
     cflags: ["-Werror"],
     shared_libs: ["libkeyutils"],
     srcs: ["keyutils_test.cpp"],
+    test_suites: ["device-tests"],
 }
diff --git a/liblog/Android.bp b/liblog/Android.bp
index 7d9e306..4a165a0 100644
--- a/liblog/Android.bp
+++ b/liblog/Android.bp
@@ -46,6 +46,7 @@
     name: "liblog_headers",
     host_supported: true,
     vendor_available: true,
+    recovery_available: true,
     export_include_dirs: ["include"],
     target: {
         windows: {
@@ -65,7 +66,7 @@
 cc_library {
     name: "liblog",
     host_supported: true,
-
+    recovery_available: true,
     srcs: liblog_sources,
 
     target: {
@@ -82,6 +83,7 @@
         },
         android_arm: {
             // TODO: This is to work around b/24465209. Remove after root cause is fixed
+            pack_relocations: false,
             ldflags: ["-Wl,--hash-style=both"],
         },
         windows: {
diff --git a/liblog/include/android/log.h b/liblog/include/android/log.h
index 28c87e4..52cbe8b 100644
--- a/liblog/include/android/log.h
+++ b/liblog/include/android/log.h
@@ -35,6 +35,11 @@
  */
 
 /**
+ * @addtogroup Logging
+ * @{
+ */
+
+/**
  * \file
  *
  * Support routines to send messages to the Android log buffer,
@@ -205,4 +210,6 @@
 }
 #endif
 
+/** @} */
+
 #endif /* _ANDROID_LOG_H */
diff --git a/liblog/logprint.c b/liblog/logprint.c
index a2839bf..7937cb1 100644
--- a/liblog/logprint.c
+++ b/liblog/logprint.c
@@ -1632,8 +1632,10 @@
     prefixLen = snprintf(prefixBuf, sizeof(prefixBuf), "\x1B[38;5;%dm",
                          colorFromPri(entry->priority));
     prefixLen = MIN(prefixLen, sizeof(prefixBuf));
-    suffixLen = snprintf(suffixBuf, sizeof(suffixBuf), "\x1B[0m");
-    suffixLen = MIN(suffixLen, sizeof(suffixBuf));
+
+    const char suffixContents[] = "\x1B[0m";
+    strcpy(suffixBuf, suffixContents);
+    suffixLen = strlen(suffixContents);
   }
 
   char uid[16];
diff --git a/libmemunreachable/Android.bp b/libmemunreachable/Android.bp
index f872d0f..248a9d2 100644
--- a/libmemunreachable/Android.bp
+++ b/libmemunreachable/Android.bp
@@ -29,7 +29,6 @@
         "HeapWalker.cpp",
         "LeakFolding.cpp",
         "LeakPipe.cpp",
-        "LineBuffer.cpp",
         "MemUnreachable.cpp",
         "ProcessMappings.cpp",
         "PtracerThread.cpp",
@@ -38,6 +37,7 @@
 
     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.
@@ -46,6 +46,12 @@
             static_libs: ["libunwind_llvm"],
         },
     },
+
+    // TODO(b/78118944), clang lld link flags do not work with special link
+    // rules for libunwind_llvm yet. Linked aosp_arm-eng image failed to
+    // boot up in the emulator.
+    use_clang_lld: false,
+
     export_include_dirs: ["include"],
     local_include_dirs: ["include"],
 }
@@ -83,6 +89,8 @@
             enabled: false,
         },
     },
+
+    test_suites: ["device-tests"],
 }
 
 cc_test {
@@ -97,4 +105,5 @@
         "libhwbinder",
         "libutils",
     ],
+    test_suites: ["device-tests"],
 }
diff --git a/libmemunreachable/LineBuffer.cpp b/libmemunreachable/LineBuffer.cpp
deleted file mode 100644
index 4ea0542..0000000
--- a/libmemunreachable/LineBuffer.cpp
+++ /dev/null
@@ -1,66 +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.
- */
-
-// Copied from system/extras/memory_replay/LineBuffer.cpp
-// TODO(ccross): find a way to share between libmemunreachable and memory_replay?
-
-#include <errno.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "LineBuffer.h"
-
-namespace android {
-
-LineBuffer::LineBuffer(int fd, char* buffer, size_t buffer_len)
-    : fd_(fd), buffer_(buffer), buffer_len_(buffer_len) {}
-
-bool LineBuffer::GetLine(char** line, size_t* line_len) {
-  while (true) {
-    if (bytes_ > 0) {
-      char* newline = reinterpret_cast<char*>(memchr(buffer_ + start_, '\n', bytes_));
-      if (newline != nullptr) {
-        *newline = '\0';
-        *line = buffer_ + start_;
-        start_ = newline - buffer_ + 1;
-        bytes_ -= newline - *line + 1;
-        *line_len = newline - *line;
-        return true;
-      }
-    }
-    if (start_ > 0) {
-      // Didn't find anything, copy the current to the front of the buffer.
-      memmove(buffer_, buffer_ + start_, bytes_);
-      start_ = 0;
-    }
-    ssize_t bytes = TEMP_FAILURE_RETRY(read(fd_, buffer_ + bytes_, buffer_len_ - bytes_ - 1));
-    if (bytes <= 0) {
-      if (bytes_ > 0) {
-        // The read data might not contain a nul terminator, so add one.
-        buffer_[bytes_] = '\0';
-        *line = buffer_ + start_;
-        *line_len = bytes_;
-        bytes_ = 0;
-        start_ = 0;
-        return true;
-      }
-      return false;
-    }
-    bytes_ += bytes;
-  }
-}
-
-}  // namespace android
diff --git a/libmemunreachable/LineBuffer.h b/libmemunreachable/LineBuffer.h
deleted file mode 100644
index cc6cd0c..0000000
--- a/libmemunreachable/LineBuffer.h
+++ /dev/null
@@ -1,40 +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 _LIBMEMUNREACHABLE_LINE_BUFFER_H
-#define _LIBMEMUNREACHABLE_LINE_BUFFER_H
-
-#include <stdint.h>
-
-namespace android {
-
-class LineBuffer {
- public:
-  LineBuffer(int fd, char* buffer, size_t buffer_len);
-
-  bool GetLine(char** line, size_t* line_len);
-
- private:
-  int fd_;
-  char* buffer_ = nullptr;
-  size_t buffer_len_ = 0;
-  size_t start_ = 0;
-  size_t bytes_ = 0;
-};
-
-}  // namespace android
-
-#endif  // _LIBMEMUNREACHABLE_LINE_BUFFER_H
diff --git a/libmemunreachable/ProcessMappings.cpp b/libmemunreachable/ProcessMappings.cpp
index 9a06870..701ce16 100644
--- a/libmemunreachable/ProcessMappings.cpp
+++ b/libmemunreachable/ProcessMappings.cpp
@@ -14,21 +14,30 @@
  * limitations under the License.
  */
 
+#include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
 #include <string.h>
 #include <unistd.h>
 
 #include <android-base/unique_fd.h>
+#include <procinfo/process_map.h>
 
-#include "LineBuffer.h"
 #include "ProcessMappings.h"
-#include "log.h"
 
 namespace android {
 
-// This function is not re-entrant since it uses a static buffer for
-// the line data.
+struct ReadMapCallback {
+  ReadMapCallback(allocator::vector<Mapping>& mappings) : mappings_(mappings) {}
+
+  void operator()(uint64_t start, uint64_t end, uint16_t flags, uint64_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);
@@ -36,35 +45,13 @@
   if (fd == -1) {
     return false;
   }
-
-  LineBuffer line_buf(fd, map_buffer, sizeof(map_buffer));
-  char* line;
-  size_t line_len;
-  while (line_buf.GetLine(&line, &line_len)) {
-    int name_pos;
-    char perms[5];
-    Mapping mapping{};
-    if (sscanf(line, "%" SCNxPTR "-%" SCNxPTR " %4s %*x %*x:%*x %*d %n", &mapping.begin,
-               &mapping.end, perms, &name_pos) == 3) {
-      if (perms[0] == 'r') {
-        mapping.read = true;
-      }
-      if (perms[1] == 'w') {
-        mapping.write = true;
-      }
-      if (perms[2] == 'x') {
-        mapping.execute = true;
-      }
-      if (perms[3] == 'p') {
-        mapping.priv = true;
-      }
-      if ((size_t)name_pos < line_len) {
-        strlcpy(mapping.name, line + name_pos, sizeof(mapping.name));
-      }
-      mappings.emplace_back(mapping);
-    }
+  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);
   }
-  return true;
+  ReadMapCallback callback(mappings);
+  return android::procinfo::ReadMapFileContent(&content[0], callback);
 }
 
 }  // namespace android
diff --git a/libmemunreachable/ProcessMappings.h b/libmemunreachable/ProcessMappings.h
index a0e97e9..94da69b 100644
--- a/libmemunreachable/ProcessMappings.h
+++ b/libmemunreachable/ProcessMappings.h
@@ -17,6 +17,8 @@
 #ifndef LIBMEMUNREACHABLE_PROCESS_MAPPING_H_
 #define LIBMEMUNREACHABLE_PROCESS_MAPPING_H_
 
+#include <string.h>
+
 #include "Allocator.h"
 
 namespace android {
@@ -27,8 +29,13 @@
   bool read;
   bool write;
   bool execute;
-  bool priv;
   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
diff --git a/libmemunreachable/README.md b/libmemunreachable/README.md
index ae8fa94..9cc0c9b 100644
--- a/libmemunreachable/README.md
+++ b/libmemunreachable/README.md
@@ -12,6 +12,27 @@
 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)` ####
@@ -23,7 +44,7 @@
 
 ### C++ interface ###
 
-####`bool GetUnreachableMemory(UnreachableMemoryInfo& info, size_t limit = 100)`####
+#### `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)` ####
diff --git a/libnativeloader/OWNERS b/libnativeloader/OWNERS
index f2cc942..5c28a9f 100644
--- a/libnativeloader/OWNERS
+++ b/libnativeloader/OWNERS
@@ -1 +1,2 @@
 dimitry@google.com
+jiyong@google.com
diff --git a/libpackagelistparser/Android.bp b/libpackagelistparser/Android.bp
index 27693b3..c38594a 100644
--- a/libpackagelistparser/Android.bp
+++ b/libpackagelistparser/Android.bp
@@ -1,6 +1,7 @@
 cc_library {
 
     name: "libpackagelistparser",
+    recovery_available: true,
     srcs: ["packagelistparser.c"],
     cflags: [
         "-Wall",
diff --git a/libprocessgroup/processgroup.cpp b/libprocessgroup/processgroup.cpp
index 58295fa..1cebb5d 100644
--- a/libprocessgroup/processgroup.cpp
+++ b/libprocessgroup/processgroup.cpp
@@ -39,18 +39,14 @@
 
 #include <android-base/file.h>
 #include <android-base/logging.h>
-#ifdef __ANDROID__
 #include <android-base/properties.h>
-#endif
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <private/android_filesystem_config.h>
 
 #include <processgroup/processgroup.h>
 
-#ifdef __ANDROID__
 using android::base::GetBoolProperty;
-#endif
 using android::base::StartsWith;
 using android::base::StringPrintf;
 using android::base::WriteStringToFile;
@@ -68,15 +64,10 @@
 static const std::string& GetCgroupRootPath() {
     static std::string cgroup_root_path;
     std::call_once(init_path_flag, [&]() {
-#ifdef __ANDROID__
         // low-ram devices use per-app memcg by default, unlike high-end ones
         bool low_ram_device = GetBoolProperty("ro.config.low_ram", false);
         bool per_app_memcg =
             GetBoolProperty("ro.config.per_app_memcg", low_ram_device);
-#else
-        // host does not support Android properties
-        bool per_app_memcg = false;
-#endif
         if (per_app_memcg) {
             // Check if mem cgroup is mounted, only then check for
             // write-access to avoid SELinux denials
diff --git a/libprocinfo/Android.bp b/libprocinfo/Android.bp
index 83b0a7f..15f03d0 100644
--- a/libprocinfo/Android.bp
+++ b/libprocinfo/Android.bp
@@ -27,6 +27,7 @@
     name: "libprocinfo",
     defaults: ["libprocinfo_defaults"],
     vendor_available: true,
+    recovery_available: true,
     vndk: {
         enabled: true,
     },
@@ -59,6 +60,7 @@
     host_supported: true,
     srcs: [
         "process_test.cpp",
+        "process_map_test.cpp",
     ],
     target: {
         darwin: {
@@ -83,4 +85,37 @@
             suffix: "64",
         },
     },
+
+    data: [
+        "testdata/*",
+    ],
+
+    test_suites: ["device-tests"],
+}
+
+cc_benchmark {
+    name: "libprocinfo_benchmark",
+    defaults: ["libprocinfo_defaults"],
+    srcs: [
+        "process_map_benchmark.cpp",
+    ],
+    shared_libs: [
+        "libbacktrace",
+        "libbase",
+        "libprocinfo",
+        "libunwindstack",
+    ],
+    compile_multilib: "both",
+    multilib: {
+        lib32: {
+            suffix: "32",
+        },
+        lib64: {
+            suffix: "64",
+        },
+    },
+
+    data: [
+        "testdata/*",
+    ],
 }
diff --git a/libprocinfo/include/procinfo/process_map.h b/libprocinfo/include/procinfo/process_map.h
new file mode 100644
index 0000000..3771f9f
--- /dev/null
+++ b/libprocinfo/include/procinfo/process_map.h
@@ -0,0 +1,151 @@
+/*
+ * 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 <stdlib.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+
+#include <functional>
+#include <string>
+
+#include <android-base/file.h>
+
+namespace android {
+namespace procinfo {
+
+template <class CallbackType>
+bool ReadMapFileContent(char* content, const CallbackType& callback) {
+  uint64_t start_addr;
+  uint64_t end_addr;
+  uint16_t flags;
+  uint64_t pgoff;
+  char* next_line = content;
+  char* p;
+
+  auto pass_space = [&]() {
+    if (*p != ' ') {
+      return false;
+    }
+    while (*p == ' ') {
+      p++;
+    }
+    return true;
+  };
+
+  auto pass_xdigit = [&]() {
+    if (!isxdigit(*p)) {
+      return false;
+    }
+    do {
+      p++;
+    } while (isxdigit(*p));
+    return true;
+  };
+
+  while (next_line != nullptr && *next_line != '\0') {
+    p = next_line;
+    next_line = strchr(next_line, '\n');
+    if (next_line != nullptr) {
+      *next_line = '\0';
+      next_line++;
+    }
+    // Parse line like: 00400000-00409000 r-xp 00000000 fc:00 426998  /usr/lib/gvfs/gvfsd-http
+    char* end;
+    // start_addr
+    start_addr = strtoull(p, &end, 16);
+    if (end == p || *end != '-') {
+      return false;
+    }
+    p = end + 1;
+    // end_addr
+    end_addr = strtoull(p, &end, 16);
+    if (end == p) {
+      return false;
+    }
+    p = end;
+    if (!pass_space()) {
+      return false;
+    }
+    // flags
+    flags = 0;
+    if (*p == 'r') {
+      flags |= PROT_READ;
+    } else if (*p != '-') {
+      return false;
+    }
+    p++;
+    if (*p == 'w') {
+      flags |= PROT_WRITE;
+    } else if (*p != '-') {
+      return false;
+    }
+    p++;
+    if (*p == 'x') {
+      flags |= PROT_EXEC;
+    } else if (*p != '-') {
+      return false;
+    }
+    p++;
+    if (*p != 'p' && *p != 's') {
+      return false;
+    }
+    p++;
+    if (!pass_space()) {
+      return false;
+    }
+    // pgoff
+    pgoff = strtoull(p, &end, 16);
+    if (end == p) {
+      return false;
+    }
+    p = end;
+    if (!pass_space()) {
+      return false;
+    }
+    // major:minor
+    if (!pass_xdigit() || *p++ != ':' || !pass_xdigit() || !pass_space()) {
+      return false;
+    }
+    // inode
+    if (!pass_xdigit() || (*p != '\0' && !pass_space())) {
+      return false;
+    }
+    // filename
+    callback(start_addr, end_addr, flags, pgoff, p);
+  }
+  return true;
+}
+
+inline bool ReadMapFile(
+    const std::string& map_file,
+    const std::function<void(uint64_t, uint64_t, uint16_t, uint64_t, const char*)>& callback) {
+  std::string content;
+  if (!android::base::ReadFileToString(map_file, &content)) {
+    return false;
+  }
+  return ReadMapFileContent(&content[0], callback);
+}
+
+inline bool ReadProcessMaps(
+    pid_t pid,
+    const std::function<void(uint64_t, uint64_t, uint16_t, uint64_t, const char*)>& callback) {
+  return ReadMapFile("/proc/" + std::to_string(pid) + "/maps", callback);
+}
+
+} /* namespace procinfo */
+} /* namespace android */
diff --git a/libprocinfo/process_map_benchmark.cpp b/libprocinfo/process_map_benchmark.cpp
new file mode 100644
index 0000000..d9e8a4d
--- /dev/null
+++ b/libprocinfo/process_map_benchmark.cpp
@@ -0,0 +1,85 @@
+/*
+ * 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 <procinfo/process_map.h>
+
+#include <string.h>
+
+#include <string>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <backtrace/BacktraceMap.h>
+#include <unwindstack/Maps.h>
+
+#include <benchmark/benchmark.h>
+
+struct MapInfo {
+  uint64_t start;
+  uint64_t end;
+  uint16_t flags;
+  uint64_t pgoff;
+  const std::string name;
+
+  MapInfo(uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, const char* name)
+      : start(start), end(end), flags(flags), pgoff(pgoff), name(name) {}
+};
+
+static void BM_ReadMapFile(benchmark::State& state) {
+  std::string map_file = android::base::GetExecutableDirectory() + "/testdata/maps";
+  for (auto _ : state) {
+    std::vector<MapInfo> maps;
+    android::procinfo::ReadMapFile(
+        map_file, [&](uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff,
+                      const char* name) { maps.emplace_back(start, end, flags, pgoff, name); });
+    CHECK_EQ(maps.size(), 2043u);
+  }
+}
+BENCHMARK(BM_ReadMapFile);
+
+static void BM_unwindstack_FileMaps(benchmark::State& state) {
+  std::string map_file = android::base::GetExecutableDirectory() + "/testdata/maps";
+  for (auto _ : state) {
+    unwindstack::FileMaps maps(map_file);
+    maps.Parse();
+    CHECK_EQ(maps.Total(), 2043u);
+  }
+}
+BENCHMARK(BM_unwindstack_FileMaps);
+
+static void BM_unwindstack_BufferMaps(benchmark::State& state) {
+  std::string map_file = android::base::GetExecutableDirectory() + "/testdata/maps";
+  std::string content;
+  CHECK(android::base::ReadFileToString(map_file, &content));
+  for (auto _ : state) {
+    unwindstack::BufferMaps maps(content.c_str());
+    maps.Parse();
+    CHECK_EQ(maps.Total(), 2043u);
+  }
+}
+BENCHMARK(BM_unwindstack_BufferMaps);
+
+static void BM_backtrace_BacktraceMap(benchmark::State& state) {
+  pid_t pid = getpid();
+  for (auto _ : state) {
+    BacktraceMap* map = BacktraceMap::Create(pid, true);
+    CHECK(map != nullptr);
+    delete map;
+  }
+}
+BENCHMARK(BM_backtrace_BacktraceMap);
+
+BENCHMARK_MAIN();
diff --git a/libprocinfo/process_map_test.cpp b/libprocinfo/process_map_test.cpp
new file mode 100644
index 0000000..900fd85
--- /dev/null
+++ b/libprocinfo/process_map_test.cpp
@@ -0,0 +1,60 @@
+/*
+ * 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 <procinfo/process_map.h>
+
+#include <string>
+
+#include <android-base/file.h>
+
+#include <gtest/gtest.h>
+
+struct MapInfo {
+  uint64_t start;
+  uint64_t end;
+  uint16_t flags;
+  uint64_t pgoff;
+  const std::string name;
+
+  MapInfo(uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, const char* name)
+      : start(start), end(end), flags(flags), pgoff(pgoff), name(name) {}
+};
+
+TEST(process_map, smoke) {
+  std::string map_file = android::base::GetExecutableDirectory() + "/testdata/maps";
+  std::vector<MapInfo> maps;
+  ASSERT_TRUE(android::procinfo::ReadMapFile(
+      map_file, [&](uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff,
+                    const char* name) { maps.emplace_back(start, end, flags, pgoff, name); }));
+  ASSERT_EQ(2043u, maps.size());
+  ASSERT_EQ(maps[0].start, 0x12c00000ULL);
+  ASSERT_EQ(maps[0].end, 0x2ac00000ULL);
+  ASSERT_EQ(maps[0].flags, PROT_READ | PROT_WRITE);
+  ASSERT_EQ(maps[0].pgoff, 0ULL);
+  ASSERT_EQ(maps[0].name, "/dev/ashmem/dalvik-main space (region space) (deleted)");
+  ASSERT_EQ(maps[876].start, 0x70e6c4f000ULL);
+  ASSERT_EQ(maps[876].end, 0x70e6c6b000ULL);
+  ASSERT_EQ(maps[876].flags, PROT_READ | PROT_EXEC);
+  ASSERT_EQ(maps[876].pgoff, 0ULL);
+  ASSERT_EQ(maps[876].name, "/system/lib64/libutils.so");
+  ASSERT_EQ(maps[1260].start, 0x70e96fa000ULL);
+  ASSERT_EQ(maps[1260].end, 0x70e96fb000ULL);
+  ASSERT_EQ(maps[1260].flags, PROT_READ);
+  ASSERT_EQ(maps[1260].pgoff, 0ULL);
+  ASSERT_EQ(maps[1260].name,
+            "/dev/ashmem/dalvik-classes.dex extracted in memory from "
+            "/data/app/com.google.sample.tunnel-HGGRU03Gu1Mwkf_-RnFmvw==/base.apk (deleted)");
+}
diff --git a/libprocinfo/testdata/maps b/libprocinfo/testdata/maps
new file mode 100644
index 0000000..3b312e3
--- /dev/null
+++ b/libprocinfo/testdata/maps
@@ -0,0 +1,2043 @@
+12c00000-2ac00000 rw-p 00000000 00:05 10267643                           /dev/ashmem/dalvik-main space (region space) (deleted)
+6fb5d000-6fd6e000 rw-p 00000000 103:1d 639511                            /data/dalvik-cache/arm64/system@framework@boot.art
+6fd6e000-6fd82000 r--p 00211000 103:1d 639511                            /data/dalvik-cache/arm64/system@framework@boot.art
+6fd82000-6fe47000 rw-p 00000000 103:1d 639514                            /data/dalvik-cache/arm64/system@framework@boot-core-libart.art
+6fe47000-6fe52000 r--p 000c5000 103:1d 639514                            /data/dalvik-cache/arm64/system@framework@boot-core-libart.art
+6fe52000-6fe84000 rw-p 00000000 103:1d 639517                            /data/dalvik-cache/arm64/system@framework@boot-conscrypt.art
+6fe84000-6fe87000 r--p 00032000 103:1d 639517                            /data/dalvik-cache/arm64/system@framework@boot-conscrypt.art
+6fe87000-6feb2000 rw-p 00000000 103:1d 639520                            /data/dalvik-cache/arm64/system@framework@boot-okhttp.art
+6feb2000-6feb5000 r--p 0002b000 103:1d 639520                            /data/dalvik-cache/arm64/system@framework@boot-okhttp.art
+6feb5000-6fef4000 rw-p 00000000 103:1d 639523                            /data/dalvik-cache/arm64/system@framework@boot-bouncycastle.art
+6fef4000-6fefb000 r--p 0003f000 103:1d 639523                            /data/dalvik-cache/arm64/system@framework@boot-bouncycastle.art
+6fefb000-6ff3f000 rw-p 00000000 103:1d 639526                            /data/dalvik-cache/arm64/system@framework@boot-apache-xml.art
+6ff3f000-6ff45000 r--p 00044000 103:1d 639526                            /data/dalvik-cache/arm64/system@framework@boot-apache-xml.art
+6ff45000-6ff7a000 rw-p 00000000 103:1d 639529                            /data/dalvik-cache/arm64/system@framework@boot-ext.art
+6ff7a000-6ff85000 r--p 00035000 103:1d 639529                            /data/dalvik-cache/arm64/system@framework@boot-ext.art
+6ff85000-70594000 rw-p 00000000 103:1d 639532                            /data/dalvik-cache/arm64/system@framework@boot-framework.art
+70594000-705cb000 r--p 0060f000 103:1d 639532                            /data/dalvik-cache/arm64/system@framework@boot-framework.art
+705cb000-7061f000 rw-p 00000000 103:1d 639535                            /data/dalvik-cache/arm64/system@framework@boot-telephony-common.art
+7061f000-70629000 r--p 00054000 103:1d 639535                            /data/dalvik-cache/arm64/system@framework@boot-telephony-common.art
+70629000-70635000 rw-p 00000000 103:1d 639538                            /data/dalvik-cache/arm64/system@framework@boot-voip-common.art
+70635000-70636000 r--p 0000c000 103:1d 639538                            /data/dalvik-cache/arm64/system@framework@boot-voip-common.art
+70636000-70644000 rw-p 00000000 103:1d 639541                            /data/dalvik-cache/arm64/system@framework@boot-ims-common.art
+70644000-70645000 r--p 0000e000 103:1d 639541                            /data/dalvik-cache/arm64/system@framework@boot-ims-common.art
+70645000-70648000 rw-p 00000000 103:1d 639544                            /data/dalvik-cache/arm64/system@framework@boot-android.hidl.base-V1.0-java.art
+70648000-7064c000 rw-p 00000000 103:1d 639547                            /data/dalvik-cache/arm64/system@framework@boot-android.hidl.manager-V1.0-java.art
+7064c000-7064d000 r--p 00004000 103:1d 639547                            /data/dalvik-cache/arm64/system@framework@boot-android.hidl.manager-V1.0-java.art
+7064d000-7064e000 rw-p 00000000 103:1d 639550                            /data/dalvik-cache/arm64/system@framework@boot-framework-oahl-backward-compatibility.art
+7064e000-70652000 rw-p 00000000 103:1d 639553                            /data/dalvik-cache/arm64/system@framework@boot-android.test.base.art
+70652000-70653000 r--p 00004000 103:1d 639553                            /data/dalvik-cache/arm64/system@framework@boot-android.test.base.art
+70653000-70654000 rw-p 00000000 103:1d 639556                            /data/dalvik-cache/arm64/system@framework@boot-com.google.vr.platform.art
+70654000-70655000 r--p 00001000 103:1d 639556                            /data/dalvik-cache/arm64/system@framework@boot-com.google.vr.platform.art
+70655000-70731000 r--p 00000000 fc:00 940                                /system/framework/arm64/boot.oat
+70731000-709ca000 r-xp 000dc000 fc:00 940                                /system/framework/arm64/boot.oat
+709ca000-709cb000 rw-p 00000000 00:00 0                                  [anon:.bss]
+709cb000-70e4c000 r--s 00000000 fc:00 961                                /system/framework/boot.vdex
+70e4c000-70e4d000 r--p 00375000 fc:00 940                                /system/framework/arm64/boot.oat
+70e4d000-70e4e000 rw-p 00376000 fc:00 940                                /system/framework/arm64/boot.oat
+70e4e000-70eab000 r--p 00000000 fc:00 916                                /system/framework/arm64/boot-core-libart.oat
+70eab000-70fad000 r-xp 0005d000 fc:00 916                                /system/framework/arm64/boot-core-libart.oat
+70fad000-70fae000 rw-p 00000000 00:00 0                                  [anon:.bss]
+70fae000-712a9000 r--s 00000000 fc:00 702                                /system/framework/boot-core-libart.vdex
+712a9000-712aa000 r--p 0015f000 fc:00 916                                /system/framework/arm64/boot-core-libart.oat
+712aa000-712ab000 rw-p 00160000 fc:00 916                                /system/framework/arm64/boot-core-libart.oat
+712ab000-712bb000 r--p 00000000 fc:00 941                                /system/framework/arm64/boot-conscrypt.oat
+712bb000-712e4000 r-xp 00010000 fc:00 941                                /system/framework/arm64/boot-conscrypt.oat
+712e4000-712e5000 rw-p 00000000 00:00 0                                  [anon:.bss]
+712e5000-71346000 r--s 00000000 fc:00 970                                /system/framework/boot-conscrypt.vdex
+71346000-71347000 r--p 00039000 fc:00 941                                /system/framework/arm64/boot-conscrypt.oat
+71347000-71348000 rw-p 0003a000 fc:00 941                                /system/framework/arm64/boot-conscrypt.oat
+71348000-71361000 r--p 00000000 fc:00 908                                /system/framework/arm64/boot-okhttp.oat
+71361000-713a3000 r-xp 00019000 fc:00 908                                /system/framework/arm64/boot-okhttp.oat
+713a3000-713a4000 rw-p 00000000 00:00 0                                  [anon:.bss]
+713a4000-71403000 r--s 00000000 fc:00 886                                /system/framework/boot-okhttp.vdex
+71403000-71404000 r--p 0005b000 fc:00 908                                /system/framework/arm64/boot-okhttp.oat
+71404000-71405000 rw-p 0005c000 fc:00 908                                /system/framework/arm64/boot-okhttp.oat
+71405000-71415000 r--p 00000000 fc:00 936                                /system/framework/arm64/boot-bouncycastle.oat
+71415000-71437000 r-xp 00010000 fc:00 936                                /system/framework/arm64/boot-bouncycastle.oat
+71437000-71438000 rw-p 00000000 00:00 0                                  [anon:.bss]
+71438000-7157b000 r--s 00000000 fc:00 1006                               /system/framework/boot-bouncycastle.vdex
+7157b000-7157c000 r--p 00032000 fc:00 936                                /system/framework/arm64/boot-bouncycastle.oat
+7157c000-7157d000 rw-p 00033000 fc:00 936                                /system/framework/arm64/boot-bouncycastle.oat
+7157d000-71583000 r--p 00000000 fc:00 932                                /system/framework/arm64/boot-apache-xml.oat
+71583000-71584000 r-xp 00006000 fc:00 932                                /system/framework/arm64/boot-apache-xml.oat
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+70629ba000-70629bb000 ---p 00000000 00:00 0                              [anon:thread signal stack guard]
+70629bb000-70629bf000 rw-p 00000000 00:00 0                              [anon:thread signal stack]
+70629bf000-70629c0000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
+70629c0000-70629c3000 rw-p 00000000 00:00 0                              [anon:bionic TLS]
+70629c3000-70629c4000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
+70629c4000-70629c5000 ---p 00000000 00:00 0                              [anon:thread signal stack guard]
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+70629c9000-70629e3000 r-xp 00000000 fc:00 2940                           /system/lib64/libandroid.so
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+70649d1000-7064ad1000 rw-p 00000000 00:05 10267648                       /dev/ashmem/dalvik-large object free list space allocation info map (deleted)
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+7065bd1000-7065cd1000 rw-p 00000000 00:05 10267641                       /dev/ashmem/dalvik-allocspace zygote / non moving space live-bitmap 0 (deleted)
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+7065d40000-7065d5a000 r--s 00000000 fc:00 222                            /system/fonts/NotoSansMyanmarUI-Regular.ttf
+7065d5a000-7065d5e000 r-xp 00000000 fc:00 2609                           /system/lib64/libtombstoned_client.so
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+7065d7f000-7065d80000 ---p 00000000 00:00 0                              [anon:thread signal stack guard]
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+70663a1000-70663a4000 rw-p 00000000 00:00 0                              [anon:.bss]
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+70663c8000-70663e5000 ---p 00000000 00:00 0 
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+70663e6000-70663e7000 rw-p 00010000 fc:00 2673                           /system/lib64/libmetricslogger.so
+70663e7000-7066400000 r--s 00000000 fc:00 110                            /system/fonts/NotoSansLepcha-Regular.ttf
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+70e69cb000-70e69e1000 r-xp 00000000 fc:00 2537                           /system/lib64/liblog.so
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+70e6adc000-70e6ae0000 r-xp 00000000 fc:00 2555                           /system/lib64/libstagefright_omx_utils.so
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+70e6f68000-70e6f84000 r--s 00000000 fc:00 170                            /system/fonts/NotoSansTelugu-Regular.ttf
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+70e710e000-70e7115000 rw-p 00000000 00:00 0                              [anon:.bss]
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+70eb03b000-70eb03c000 ---p 00000000 00:00 0                              [anon:thread signal stack guard]
+70eb03c000-70eb040000 rw-p 00000000 00:00 0                              [anon:thread signal stack]
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+70eb042000-70eb05f000 ---p 00000000 00:00 0 
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+70eb060000-70eb061000 rw-p 00010000 fc:00 2935                           /system/lib64/libhardware.so
+70eb061000-70eb063000 r--s 00000000 fc:00 171                            /system/fonts/NotoSansInscriptionalPahlavi-Regular.ttf
+70eb063000-70eb064000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
+70eb064000-70eb067000 rw-p 00000000 00:00 0                              [anon:bionic TLS]
+70eb067000-70eb068000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
+70eb068000-70eb069000 ---p 00000000 00:00 0                              [anon:thread signal stack guard]
+70eb069000-70eb06d000 rw-p 00000000 00:00 0                              [anon:thread signal stack]
+70eb06d000-70eb06e000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
+70eb06e000-70eb071000 rw-p 00000000 00:00 0                              [anon:bionic TLS]
+70eb071000-70eb072000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
+70eb072000-70eb073000 ---p 00000000 00:00 0                              [anon:thread signal stack guard]
+70eb073000-70eb077000 rw-p 00000000 00:00 0                              [anon:thread signal stack]
+70eb077000-70eb078000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
+70eb078000-70eb07b000 rw-p 00000000 00:00 0                              [anon:bionic TLS]
+70eb07b000-70eb07c000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
+70eb07c000-70eb07d000 ---p 00000000 00:00 0                              [anon:thread signal stack guard]
+70eb07d000-70eb081000 rw-p 00000000 00:00 0                              [anon:thread signal stack]
+70eb081000-70eb082000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
+70eb082000-70eb085000 rw-p 00000000 00:00 0                              [anon:bionic TLS]
+70eb085000-70eb086000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
+70eb086000-70eb09d000 r-xp 00000000 fc:00 2604                           /system/lib64/libz.so
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+70eb0b5000-70eb0b6000 r--p 0001f000 fc:00 2604                           /system/lib64/libz.so
+70eb0b6000-70eb0b7000 rw-p 00020000 fc:00 2604                           /system/lib64/libz.so
+70eb0b7000-70eb0bb000 r--s 00000000 fc:00 289                            /system/fonts/NotoSansArmenian-Regular.ttf
+70eb0bb000-70eb0bc000 ---p 00000000 00:00 0                              [anon:thread signal stack guard]
+70eb0bc000-70eb0c0000 rw-p 00000000 00:00 0                              [anon:thread signal stack]
+70eb0c0000-70eb0c1000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
+70eb0c1000-70eb0c4000 rw-p 00000000 00:00 0                              [anon:bionic TLS]
+70eb0c4000-70eb0c5000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
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+70ebd40000-70ebd41000 r--p 00005000 103:1d 639553                        /data/dalvik-cache/arm64/system@framework@boot-android.test.base.art
+70ebd41000-70ebd42000 r--p 00000000 00:00 0                              [anon:linker_alloc]
+70ebd42000-70ebd43000 r--p 00001000 103:1d 639550                        /data/dalvik-cache/arm64/system@framework@boot-framework-oahl-backward-compatibility.art
+70ebd43000-70ebd44000 r--p 00005000 103:1d 639547                        /data/dalvik-cache/arm64/system@framework@boot-android.hidl.manager-V1.0-java.art
+70ebd44000-70ebd45000 r--p 00003000 103:1d 639544                        /data/dalvik-cache/arm64/system@framework@boot-android.hidl.base-V1.0-java.art
+70ebd45000-70ebd46000 r--p 00000000 00:00 0                              [anon:linker_alloc]
+70ebd46000-70ebd47000 r--p 0000f000 103:1d 639541                        /data/dalvik-cache/arm64/system@framework@boot-ims-common.art
+70ebd47000-70ebd48000 r--p 0000d000 103:1d 639538                        /data/dalvik-cache/arm64/system@framework@boot-voip-common.art
+70ebd48000-70ebd4a000 r--p 0005e000 103:1d 639535                        /data/dalvik-cache/arm64/system@framework@boot-telephony-common.art
+70ebd4a000-70ebd4b000 r--p 00040000 103:1d 639529                        /data/dalvik-cache/arm64/system@framework@boot-ext.art
+70ebd4b000-70ebd4c000 r--p 0004a000 103:1d 639526                        /data/dalvik-cache/arm64/system@framework@boot-apache-xml.art
+70ebd4c000-70ebd4d000 r--p 00046000 103:1d 639523                        /data/dalvik-cache/arm64/system@framework@boot-bouncycastle.art
+70ebd4d000-70ebd4e000 r--p 00000000 00:00 0                              [anon:linker_alloc]
+70ebd4e000-70ebd53000 r--p 00225000 103:1d 639511                        /data/dalvik-cache/arm64/system@framework@boot.art
+70ebd53000-70ebd5a000 rw-p 00000000 fc:00 583                            /system/etc/event-log-tags
+70ebd5a000-70ebd5b000 r--p 00000000 00:00 0                              [anon:linker_alloc]
+70ebd5b000-70ebd5c000 r--p 0002e000 103:1d 639520                        /data/dalvik-cache/arm64/system@framework@boot-okhttp.art
+70ebd5c000-70ebd5d000 r--p 00035000 103:1d 639517                        /data/dalvik-cache/arm64/system@framework@boot-conscrypt.art
+70ebd5d000-70ebd5f000 r--p 000d0000 103:1d 639514                        /data/dalvik-cache/arm64/system@framework@boot-core-libart.art
+70ebd5f000-70ebd62000 r--p 00000000 00:00 0                              [anon:atexit handlers]
+70ebd62000-70ebd63000 rw-p 00000000 00:00 0 
+70ebd63000-70ebd83000 r--s 00000000 00:10 16590                          /dev/__properties__/u:object_r:exported2_default_prop:s0
+70ebd83000-70ebd84000 rw-p 00000000 00:00 0                              [anon:linker_alloc]
+70ebd84000-70ebd89000 rw-p 00000000 00:00 0 
+70ebd89000-70ebda9000 r--s 00000000 00:10 16669                          /dev/__properties__/properties_serial
+70ebda9000-70ebdb3000 r--s 00000000 00:10 16560                          /dev/__properties__/property_info
+70ebdb3000-70ebdb4000 rw-p 00000000 00:00 0                              [anon:linker_alloc_vector]
+70ebdb4000-70ebdb5000 rw-p 00000000 00:00 0                              [anon:linker_alloc_small_objects]
+70ebdb5000-70ebdb7000 rw-p 00000000 00:00 0                              [anon:System property context nodes]
+70ebdb7000-70ebdb8000 rw-p 00000000 00:00 0                              [anon:linker_alloc_vector]
+70ebdb8000-70ebdba000 rw-p 00000000 00:00 0                              [anon:linker_alloc_small_objects]
+70ebdba000-70ebdbb000 rw-p 00000000 00:00 0                              [anon:linker_alloc]
+70ebdbb000-70ebdbd000 rw-p 00000000 00:00 0                              [anon:linker_alloc_small_objects]
+70ebdbd000-70ebdbe000 r--p 00000000 00:00 0                              [anon:atexit handlers]
+70ebdbe000-70ebdbf000 r--p 00000000 00:00 0                              [anon:linker_alloc]
+70ebdbf000-70ebdc0000 rw-p 00000000 00:00 0                              [anon:linker_alloc_small_objects]
+70ebdc0000-70ebdc1000 rw-p 00000000 00:00 0                              [anon:linker_alloc_vector]
+70ebdc1000-70ebdc2000 rw-p 00000000 00:00 0                              [anon:linker_alloc_small_objects]
+70ebdc2000-70ebdc3000 rw-p 00000000 00:00 0                              [anon:linker_alloc_vector]
+70ebdc3000-70ebdc5000 rw-p 00000000 00:00 0                              [anon:linker_alloc_small_objects]
+70ebdc5000-70ebde5000 r--s 00000000 00:10 16600                          /dev/__properties__/u:object_r:exported_default_prop:s0
+70ebde5000-70ebde6000 rw-p 00000000 00:00 0                              [anon:linker_alloc_small_objects]
+70ebde6000-70ebde8000 r--p 00000000 00:00 0                              [anon:linker_alloc]
+70ebde8000-70ebe08000 r--s 00000000 00:10 16582                          /dev/__properties__/u:object_r:debug_prop:s0
+70ebe08000-70ebe09000 ---p 00000000 00:00 0 
+70ebe09000-70ebe0a000 rw-p 00000000 00:00 0 
+70ebe0a000-70ebe0b000 ---p 00000000 00:00 0 
+70ebe0b000-70ebe2b000 r--s 00000000 00:10 16669                          /dev/__properties__/properties_serial
+70ebe2b000-70ebe2d000 rw-p 00000000 00:00 0                              [anon:System property context nodes]
+70ebe2d000-70ebf55000 r-xp 00000000 fc:00 3184                           /system/bin/linker64
+70ebf55000-70ebf5f000 r--s 00000000 00:10 16560                          /dev/__properties__/property_info
+70ebf5f000-70ebf60000 r--p 00000000 00:00 0                              [anon:linker_alloc]
+70ebf60000-70ebf61000 rw-p 00000000 00:00 0                              [anon:linker_alloc_vector]
+70ebf61000-70ebf62000 rw-p 00000000 00:00 0                              [anon:linker_alloc_small_objects]
+70ebf62000-70ebf63000 rw-p 00000000 00:00 0                              [anon:arc4random data]
+70ebf63000-70ebf64000 rw-p 00000000 00:00 0                              [anon:linker_alloc_small_objects]
+70ebf64000-70ebf65000 r--p 00000000 00:00 0                              [anon:atexit handlers]
+70ebf65000-70ebf66000 ---p 00000000 00:00 0                              [anon:thread signal stack guard]
+70ebf66000-70ebf6a000 rw-p 00000000 00:00 0                              [anon:thread signal stack]
+70ebf6a000-70ebf6b000 rw-p 00000000 00:00 0                              [anon:arc4random data]
+70ebf6b000-70ebf6c000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
+70ebf6c000-70ebf6f000 rw-p 00000000 00:00 0                              [anon:bionic TLS]
+70ebf6f000-70ebf70000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
+70ebf70000-70ebf71000 r--p 00000000 00:00 0                              [vvar]
+70ebf71000-70ebf72000 r-xp 00000000 00:00 0                              [vdso]
+70ebf72000-70ebf7d000 r--p 00135000 fc:00 3184                           /system/bin/linker64
+70ebf7d000-70ebf7e000 rw-p 00140000 fc:00 3184                           /system/bin/linker64
+70ebf7e000-70ebf81000 rw-p 00000000 00:00 0 
+70ebf81000-70ebf82000 r--p 00000000 00:00 0 
+70ebf82000-70ebf89000 rw-p 00000000 00:00 0 
+7fc7df1000-7fc7df2000 ---p 00000000 00:00 0 
+7fc7df2000-7fc85f1000 rw-p 00000000 00:00 0                              [stack]
diff --git a/libsparse/.clang-format b/libsparse/.clang-format
new file mode 120000
index 0000000..fd0645f
--- /dev/null
+++ b/libsparse/.clang-format
@@ -0,0 +1 @@
+../.clang-format-2
\ No newline at end of file
diff --git a/libsparse/Android.bp b/libsparse/Android.bp
index b894656..8ad339f 100644
--- a/libsparse/Android.bp
+++ b/libsparse/Android.bp
@@ -3,13 +3,14 @@
 cc_library {
     name: "libsparse",
     host_supported: true,
+    recovery_available: true,
     unique_host_soname: true,
     srcs: [
-        "backed_block.c",
-        "output_file.c",
-        "sparse.c",
-        "sparse_crc32.c",
-        "sparse_err.c",
+        "backed_block.cpp",
+        "output_file.cpp",
+        "sparse.cpp",
+        "sparse_crc32.cpp",
+        "sparse_err.cpp",
         "sparse_read.cpp",
     ],
     cflags: ["-Werror"],
@@ -30,8 +31,8 @@
     name: "simg2img",
     host_supported: true,
     srcs: [
-        "simg2img.c",
-        "sparse_crc32.c",
+        "simg2img.cpp",
+        "sparse_crc32.cpp",
     ],
     static_libs: [
         "libsparse",
@@ -45,7 +46,7 @@
 cc_binary {
     name: "img2simg",
     host_supported: true,
-    srcs: ["img2simg.c"],
+    srcs: ["img2simg.cpp"],
     static_libs: [
         "libsparse",
         "libz",
@@ -57,7 +58,7 @@
 
 cc_binary_host {
     name: "append2simg",
-    srcs: ["append2simg.c"],
+    srcs: ["append2simg.cpp"],
     static_libs: [
         "libsparse",
         "libz",
diff --git a/libsparse/OWNERS b/libsparse/OWNERS
new file mode 100644
index 0000000..70b375f
--- /dev/null
+++ b/libsparse/OWNERS
@@ -0,0 +1 @@
+ccross@google.com
diff --git a/libsparse/append2simg.c b/libsparse/append2simg.c
deleted file mode 100644
index eef8764..0000000
--- a/libsparse/append2simg.c
+++ /dev/null
@@ -1,140 +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 _FILE_OFFSET_BITS 64
-#define _LARGEFILE64_SOURCE 1
-#define _GNU_SOURCE
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <sparse/sparse.h>
-#include "sparse_file.h"
-#include "backed_block.h"
-
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
-
-#if defined(__APPLE__) && defined(__MACH__)
-#define lseek64 lseek
-#endif
-#if defined(__APPLE__) && defined(__MACH__)
-#define lseek64 lseek
-#define off64_t off_t
-#endif
-
-void usage()
-{
-    fprintf(stderr, "Usage: append2simg <output> <input>\n");
-}
-
-int main(int argc, char *argv[])
-{
-    int output;
-    int output_block;
-    char *output_path;
-    struct sparse_file *sparse_output;
-
-    int input;
-    char *input_path;
-    off64_t input_len;
-
-    int tmp_fd;
-    char *tmp_path;
-
-    int ret;
-
-    if (argc == 3) {
-        output_path = argv[1];
-        input_path = argv[2];
-    } else {
-        usage();
-        exit(-1);
-    }
-
-    ret = asprintf(&tmp_path, "%s.append2simg", output_path);
-    if (ret < 0) {
-        fprintf(stderr, "Couldn't allocate filename\n");
-        exit(-1);
-    }
-
-    output = open(output_path, O_RDWR | O_BINARY);
-    if (output < 0) {
-        fprintf(stderr, "Couldn't open output file (%s)\n", strerror(errno));
-        exit(-1);
-    }
-
-    sparse_output = sparse_file_import_auto(output, false, true);
-    if (!sparse_output) {
-        fprintf(stderr, "Couldn't import output file\n");
-        exit(-1);
-    }
-
-    input = open(input_path, O_RDONLY | O_BINARY);
-    if (input < 0) {
-        fprintf(stderr, "Couldn't open input file (%s)\n", strerror(errno));
-        exit(-1);
-    }
-
-    input_len = lseek64(input, 0, SEEK_END);
-    if (input_len < 0) {
-        fprintf(stderr, "Couldn't get input file length (%s)\n", strerror(errno));
-        exit(-1);
-    } else if (input_len % sparse_output->block_size) {
-        fprintf(stderr, "Input file is not a multiple of the output file's block size");
-        exit(-1);
-    }
-    lseek64(input, 0, SEEK_SET);
-
-    output_block = sparse_output->len / sparse_output->block_size;
-    if (sparse_file_add_fd(sparse_output, input, 0, input_len, output_block) < 0) {
-        fprintf(stderr, "Couldn't add input file\n");
-        exit(-1);
-    }
-    sparse_output->len += input_len;
-
-    tmp_fd = open(tmp_path, O_WRONLY | O_CREAT | O_BINARY, 0664);
-    if (tmp_fd < 0) {
-        fprintf(stderr, "Couldn't open temporary file (%s)\n", strerror(errno));
-        exit(-1);
-    }
-
-    lseek64(output, 0, SEEK_SET);
-    if (sparse_file_write(sparse_output, tmp_fd, false, true, false) < 0) {
-        fprintf(stderr, "Failed to write sparse file\n");
-        exit(-1);
-    }
-
-    sparse_file_destroy(sparse_output);
-    close(tmp_fd);
-    close(output);
-    close(input);
-
-    ret = rename(tmp_path, output_path);
-    if (ret < 0) {
-        fprintf(stderr, "Failed to rename temporary file (%s)\n", strerror(errno));
-        exit(-1);
-    }
-
-    free(tmp_path);
-
-    exit(0);
-}
diff --git a/libsparse/append2simg.cpp b/libsparse/append2simg.cpp
new file mode 100644
index 0000000..99f4339
--- /dev/null
+++ b/libsparse/append2simg.cpp
@@ -0,0 +1,137 @@
+/*
+ * 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 _FILE_OFFSET_BITS 64
+#define _LARGEFILE64_SOURCE 1
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sparse/sparse.h>
+#include "backed_block.h"
+#include "sparse_file.h"
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+#if defined(__APPLE__) && defined(__MACH__)
+#define lseek64 lseek
+#endif
+#if defined(__APPLE__) && defined(__MACH__)
+#define lseek64 lseek
+#define off64_t off_t
+#endif
+
+void usage() {
+  fprintf(stderr, "Usage: append2simg <output> <input>\n");
+}
+
+int main(int argc, char* argv[]) {
+  int output;
+  int output_block;
+  char* output_path;
+  struct sparse_file* sparse_output;
+
+  int input;
+  char* input_path;
+  off64_t input_len;
+
+  int tmp_fd;
+  char* tmp_path;
+
+  int ret;
+
+  if (argc == 3) {
+    output_path = argv[1];
+    input_path = argv[2];
+  } else {
+    usage();
+    exit(-1);
+  }
+
+  ret = asprintf(&tmp_path, "%s.append2simg", output_path);
+  if (ret < 0) {
+    fprintf(stderr, "Couldn't allocate filename\n");
+    exit(-1);
+  }
+
+  output = open(output_path, O_RDWR | O_BINARY);
+  if (output < 0) {
+    fprintf(stderr, "Couldn't open output file (%s)\n", strerror(errno));
+    exit(-1);
+  }
+
+  sparse_output = sparse_file_import_auto(output, false, true);
+  if (!sparse_output) {
+    fprintf(stderr, "Couldn't import output file\n");
+    exit(-1);
+  }
+
+  input = open(input_path, O_RDONLY | O_BINARY);
+  if (input < 0) {
+    fprintf(stderr, "Couldn't open input file (%s)\n", strerror(errno));
+    exit(-1);
+  }
+
+  input_len = lseek64(input, 0, SEEK_END);
+  if (input_len < 0) {
+    fprintf(stderr, "Couldn't get input file length (%s)\n", strerror(errno));
+    exit(-1);
+  } else if (input_len % sparse_output->block_size) {
+    fprintf(stderr, "Input file is not a multiple of the output file's block size");
+    exit(-1);
+  }
+  lseek64(input, 0, SEEK_SET);
+
+  output_block = sparse_output->len / sparse_output->block_size;
+  if (sparse_file_add_fd(sparse_output, input, 0, input_len, output_block) < 0) {
+    fprintf(stderr, "Couldn't add input file\n");
+    exit(-1);
+  }
+  sparse_output->len += input_len;
+
+  tmp_fd = open(tmp_path, O_WRONLY | O_CREAT | O_BINARY, 0664);
+  if (tmp_fd < 0) {
+    fprintf(stderr, "Couldn't open temporary file (%s)\n", strerror(errno));
+    exit(-1);
+  }
+
+  lseek64(output, 0, SEEK_SET);
+  if (sparse_file_write(sparse_output, tmp_fd, false, true, false) < 0) {
+    fprintf(stderr, "Failed to write sparse file\n");
+    exit(-1);
+  }
+
+  sparse_file_destroy(sparse_output);
+  close(tmp_fd);
+  close(output);
+  close(input);
+
+  ret = rename(tmp_path, output_path);
+  if (ret < 0) {
+    fprintf(stderr, "Failed to rename temporary file (%s)\n", strerror(errno));
+    exit(-1);
+  }
+
+  free(tmp_path);
+
+  exit(0);
+}
diff --git a/libsparse/backed_block.c b/libsparse/backed_block.c
deleted file mode 100644
index 794cd6b..0000000
--- a/libsparse/backed_block.c
+++ /dev/null
@@ -1,404 +0,0 @@
-/*
- * Copyright (C) 2010 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 <assert.h>
-#include <errno.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "backed_block.h"
-#include "sparse_defs.h"
-
-struct backed_block {
-	unsigned int block;
-	unsigned int len;
-	enum backed_block_type type;
-	union {
-		struct {
-			void *data;
-		} data;
-		struct {
-			char *filename;
-			int64_t offset;
-		} file;
-		struct {
-			int fd;
-			int64_t offset;
-		} fd;
-		struct {
-			uint32_t val;
-		} fill;
-	};
-	struct backed_block *next;
-};
-
-struct backed_block_list {
-	struct backed_block *data_blocks;
-	struct backed_block *last_used;
-	unsigned int block_size;
-};
-
-struct backed_block *backed_block_iter_new(struct backed_block_list *bbl)
-{
-	return bbl->data_blocks;
-}
-
-struct backed_block *backed_block_iter_next(struct backed_block *bb)
-{
-	return bb->next;
-}
-
-unsigned int backed_block_len(struct backed_block *bb)
-{
-	return bb->len;
-}
-
-unsigned int backed_block_block(struct backed_block *bb)
-{
-	return bb->block;
-}
-
-void *backed_block_data(struct backed_block *bb)
-{
-	assert(bb->type == BACKED_BLOCK_DATA);
-	return bb->data.data;
-}
-
-const char *backed_block_filename(struct backed_block *bb)
-{
-	assert(bb->type == BACKED_BLOCK_FILE);
-	return bb->file.filename;
-}
-
-int backed_block_fd(struct backed_block *bb)
-{
-	assert(bb->type == BACKED_BLOCK_FD);
-	return bb->fd.fd;
-}
-
-int64_t backed_block_file_offset(struct backed_block *bb)
-{
-	assert(bb->type == BACKED_BLOCK_FILE || bb->type == BACKED_BLOCK_FD);
-	if (bb->type == BACKED_BLOCK_FILE) {
-		return bb->file.offset;
-	} else { /* bb->type == BACKED_BLOCK_FD */
-		return bb->fd.offset;
-	}
-}
-
-uint32_t backed_block_fill_val(struct backed_block *bb)
-{
-	assert(bb->type == BACKED_BLOCK_FILL);
-	return bb->fill.val;
-}
-
-enum backed_block_type backed_block_type(struct backed_block *bb)
-{
-	return bb->type;
-}
-
-void backed_block_destroy(struct backed_block *bb)
-{
-	if (bb->type == BACKED_BLOCK_FILE) {
-		free(bb->file.filename);
-	}
-
-	free(bb);
-}
-
-struct backed_block_list *backed_block_list_new(unsigned int block_size)
-{
-	struct backed_block_list *b = calloc(sizeof(struct backed_block_list), 1);
-	b->block_size = block_size;
-	return b;
-}
-
-void backed_block_list_destroy(struct backed_block_list *bbl)
-{
-	if (bbl->data_blocks) {
-		struct backed_block *bb = bbl->data_blocks;
-		while (bb) {
-			struct backed_block *next = bb->next;
-			backed_block_destroy(bb);
-			bb = next;
-		}
-	}
-
-	free(bbl);
-}
-
-void backed_block_list_move(struct backed_block_list *from,
-		struct backed_block_list *to, struct backed_block *start,
-		struct backed_block *end)
-{
-	struct backed_block *bb;
-
-	if (start == NULL) {
-		start = from->data_blocks;
-	}
-
-	if (!end) {
-		for (end = start; end && end->next; end = end->next)
-			;
-	}
-
-	if (start == NULL || end == NULL) {
-		return;
-	}
-
-	from->last_used = NULL;
-	to->last_used = NULL;
-	if (from->data_blocks == start) {
-		from->data_blocks = end->next;
-	} else {
-		for (bb = from->data_blocks; bb; bb = bb->next) {
-			if (bb->next == start) {
-				bb->next = end->next;
-				break;
-			}
-		}
-	}
-
-	if (!to->data_blocks) {
-		to->data_blocks = start;
-		end->next = NULL;
-	} else {
-		for (bb = to->data_blocks; bb; bb = bb->next) {
-			if (!bb->next || bb->next->block > start->block) {
-				end->next = bb->next;
-				bb->next = start;
-				break;
-			}
-		}
-	}
-}
-
-/* may free b */
-static int merge_bb(struct backed_block_list *bbl,
-		struct backed_block *a, struct backed_block *b)
-{
-	unsigned int block_len;
-
-	/* Block doesn't exist (possible if one block is the last block) */
-	if (!a || !b) {
-		return -EINVAL;
-	}
-
-	assert(a->block < b->block);
-
-	/* Blocks are of different types */
-	if (a->type != b->type) {
-		return -EINVAL;
-	}
-
-	/* Blocks are not adjacent */
-	block_len = a->len / bbl->block_size; /* rounds down */
-	if (a->block + block_len != b->block) {
-		return -EINVAL;
-	}
-
-	switch (a->type) {
-	case BACKED_BLOCK_DATA:
-		/* Don't support merging data for now */
-		return -EINVAL;
-	case BACKED_BLOCK_FILL:
-		if (a->fill.val != b->fill.val) {
-			return -EINVAL;
-		}
-		break;
-	case BACKED_BLOCK_FILE:
-		/* Already make sure b->type is BACKED_BLOCK_FILE */
-		if (strcmp(a->file.filename, b->file.filename) ||
-				a->file.offset + a->len != b->file.offset) {
-			return -EINVAL;
-		}
-		break;
-	case BACKED_BLOCK_FD:
-		if (a->fd.fd != b->fd.fd ||
-				a->fd.offset + a->len != b->fd.offset) {
-			return -EINVAL;
-		}
-		break;
-	}
-
-	/* Blocks are compatible and adjacent, with a before b.  Merge b into a,
-	 * and free b */
-	a->len += b->len;
-	a->next = b->next;
-
-	backed_block_destroy(b);
-
-	return 0;
-}
-
-static int queue_bb(struct backed_block_list *bbl, struct backed_block *new_bb)
-{
-	struct backed_block *bb;
-
-	if (bbl->data_blocks == NULL) {
-		bbl->data_blocks = new_bb;
-		return 0;
-	}
-
-	if (bbl->data_blocks->block > new_bb->block) {
-		new_bb->next = bbl->data_blocks;
-		bbl->data_blocks = new_bb;
-		return 0;
-	}
-
-	/* Optimization: blocks are mostly queued in sequence, so save the
-	   pointer to the last bb that was added, and start searching from
-	   there if the next block number is higher */
-	if (bbl->last_used && new_bb->block > bbl->last_used->block)
-		bb = bbl->last_used;
-	else
-		bb = bbl->data_blocks;
-	bbl->last_used = new_bb;
-
-	for (; bb->next && bb->next->block < new_bb->block; bb = bb->next)
-		;
-
-	if (bb->next == NULL) {
-		bb->next = new_bb;
-	} else {
-		new_bb->next = bb->next;
-		bb->next = new_bb;
-	}
-
-	merge_bb(bbl, new_bb, new_bb->next);
-	if (!merge_bb(bbl, bb, new_bb)) {
-		/* new_bb destroyed, point to retained as last_used */
-		bbl->last_used = bb;
-	}
-
-	return 0;
-}
-
-/* Queues a fill block of memory to be written to the specified data blocks */
-int backed_block_add_fill(struct backed_block_list *bbl, unsigned int fill_val,
-		unsigned int len, unsigned int block)
-{
-	struct backed_block *bb = calloc(1, sizeof(struct backed_block));
-	if (bb == NULL) {
-		return -ENOMEM;
-	}
-
-	bb->block = block;
-	bb->len = len;
-	bb->type = BACKED_BLOCK_FILL;
-	bb->fill.val = fill_val;
-	bb->next = NULL;
-
-	return queue_bb(bbl, bb);
-}
-
-/* Queues a block of memory to be written to the specified data blocks */
-int backed_block_add_data(struct backed_block_list *bbl, void *data,
-		unsigned int len, unsigned int block)
-{
-	struct backed_block *bb = calloc(1, sizeof(struct backed_block));
-	if (bb == NULL) {
-		return -ENOMEM;
-	}
-
-	bb->block = block;
-	bb->len = len;
-	bb->type = BACKED_BLOCK_DATA;
-	bb->data.data = data;
-	bb->next = NULL;
-
-	return queue_bb(bbl, bb);
-}
-
-/* Queues a chunk of a file on disk to be written to the specified data blocks */
-int backed_block_add_file(struct backed_block_list *bbl, const char *filename,
-		int64_t offset, unsigned int len, unsigned int block)
-{
-	struct backed_block *bb = calloc(1, sizeof(struct backed_block));
-	if (bb == NULL) {
-		return -ENOMEM;
-	}
-
-	bb->block = block;
-	bb->len = len;
-	bb->type = BACKED_BLOCK_FILE;
-	bb->file.filename = strdup(filename);
-	bb->file.offset = offset;
-	bb->next = NULL;
-
-	return queue_bb(bbl, bb);
-}
-
-/* Queues a chunk of a fd to be written to the specified data blocks */
-int backed_block_add_fd(struct backed_block_list *bbl, int fd, int64_t offset,
-		unsigned int len, unsigned int block)
-{
-	struct backed_block *bb = calloc(1, sizeof(struct backed_block));
-	if (bb == NULL) {
-		return -ENOMEM;
-	}
-
-	bb->block = block;
-	bb->len = len;
-	bb->type = BACKED_BLOCK_FD;
-	bb->fd.fd = fd;
-	bb->fd.offset = offset;
-	bb->next = NULL;
-
-	return queue_bb(bbl, bb);
-}
-
-int backed_block_split(struct backed_block_list *bbl, struct backed_block *bb,
-		unsigned int max_len)
-{
-	struct backed_block *new_bb;
-
-	max_len = ALIGN_DOWN(max_len, bbl->block_size);
-
-	if (bb->len <= max_len) {
-		return 0;
-	}
-
-	new_bb = malloc(sizeof(struct backed_block));
-	if (new_bb == NULL) {
-		return -ENOMEM;
-	}
-
-	*new_bb = *bb;
-
-	new_bb->len = bb->len - max_len;
-	new_bb->block = bb->block + max_len / bbl->block_size;
-	new_bb->next = bb->next;
-	bb->next = new_bb;
-	bb->len = max_len;
-
-	switch (bb->type) {
-	case BACKED_BLOCK_DATA:
-		new_bb->data.data = (char *)bb->data.data + max_len;
-		break;
-	case BACKED_BLOCK_FILE:
-		new_bb->file.offset += max_len;
-		break;
-	case BACKED_BLOCK_FD:
-		new_bb->fd.offset += max_len;
-		break;
-	case BACKED_BLOCK_FILL:
-		break;
-	}
-
-	return 0;
-}
diff --git a/libsparse/backed_block.cpp b/libsparse/backed_block.cpp
new file mode 100644
index 0000000..7f5632e
--- /dev/null
+++ b/libsparse/backed_block.cpp
@@ -0,0 +1,380 @@
+/*
+ * Copyright (C) 2010 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 <assert.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "backed_block.h"
+#include "sparse_defs.h"
+
+struct backed_block {
+  unsigned int block;
+  unsigned int len;
+  enum backed_block_type type;
+  union {
+    struct {
+      void* data;
+    } data;
+    struct {
+      char* filename;
+      int64_t offset;
+    } file;
+    struct {
+      int fd;
+      int64_t offset;
+    } fd;
+    struct {
+      uint32_t val;
+    } fill;
+  };
+  struct backed_block* next;
+};
+
+struct backed_block_list {
+  struct backed_block* data_blocks;
+  struct backed_block* last_used;
+  unsigned int block_size;
+};
+
+struct backed_block* backed_block_iter_new(struct backed_block_list* bbl) {
+  return bbl->data_blocks;
+}
+
+struct backed_block* backed_block_iter_next(struct backed_block* bb) {
+  return bb->next;
+}
+
+unsigned int backed_block_len(struct backed_block* bb) {
+  return bb->len;
+}
+
+unsigned int backed_block_block(struct backed_block* bb) {
+  return bb->block;
+}
+
+void* backed_block_data(struct backed_block* bb) {
+  assert(bb->type == BACKED_BLOCK_DATA);
+  return bb->data.data;
+}
+
+const char* backed_block_filename(struct backed_block* bb) {
+  assert(bb->type == BACKED_BLOCK_FILE);
+  return bb->file.filename;
+}
+
+int backed_block_fd(struct backed_block* bb) {
+  assert(bb->type == BACKED_BLOCK_FD);
+  return bb->fd.fd;
+}
+
+int64_t backed_block_file_offset(struct backed_block* bb) {
+  assert(bb->type == BACKED_BLOCK_FILE || bb->type == BACKED_BLOCK_FD);
+  if (bb->type == BACKED_BLOCK_FILE) {
+    return bb->file.offset;
+  } else { /* bb->type == BACKED_BLOCK_FD */
+    return bb->fd.offset;
+  }
+}
+
+uint32_t backed_block_fill_val(struct backed_block* bb) {
+  assert(bb->type == BACKED_BLOCK_FILL);
+  return bb->fill.val;
+}
+
+enum backed_block_type backed_block_type(struct backed_block* bb) {
+  return bb->type;
+}
+
+void backed_block_destroy(struct backed_block* bb) {
+  if (bb->type == BACKED_BLOCK_FILE) {
+    free(bb->file.filename);
+  }
+
+  free(bb);
+}
+
+struct backed_block_list* backed_block_list_new(unsigned int block_size) {
+  struct backed_block_list* b =
+      reinterpret_cast<backed_block_list*>(calloc(sizeof(struct backed_block_list), 1));
+  b->block_size = block_size;
+  return b;
+}
+
+void backed_block_list_destroy(struct backed_block_list* bbl) {
+  if (bbl->data_blocks) {
+    struct backed_block* bb = bbl->data_blocks;
+    while (bb) {
+      struct backed_block* next = bb->next;
+      backed_block_destroy(bb);
+      bb = next;
+    }
+  }
+
+  free(bbl);
+}
+
+void backed_block_list_move(struct backed_block_list* from, struct backed_block_list* to,
+                            struct backed_block* start, struct backed_block* end) {
+  struct backed_block* bb;
+
+  if (start == NULL) {
+    start = from->data_blocks;
+  }
+
+  if (!end) {
+    for (end = start; end && end->next; end = end->next)
+      ;
+  }
+
+  if (start == NULL || end == NULL) {
+    return;
+  }
+
+  from->last_used = NULL;
+  to->last_used = NULL;
+  if (from->data_blocks == start) {
+    from->data_blocks = end->next;
+  } else {
+    for (bb = from->data_blocks; bb; bb = bb->next) {
+      if (bb->next == start) {
+        bb->next = end->next;
+        break;
+      }
+    }
+  }
+
+  if (!to->data_blocks) {
+    to->data_blocks = start;
+    end->next = NULL;
+  } else {
+    for (bb = to->data_blocks; bb; bb = bb->next) {
+      if (!bb->next || bb->next->block > start->block) {
+        end->next = bb->next;
+        bb->next = start;
+        break;
+      }
+    }
+  }
+}
+
+/* may free b */
+static int merge_bb(struct backed_block_list* bbl, struct backed_block* a, struct backed_block* b) {
+  unsigned int block_len;
+
+  /* Block doesn't exist (possible if one block is the last block) */
+  if (!a || !b) {
+    return -EINVAL;
+  }
+
+  assert(a->block < b->block);
+
+  /* Blocks are of different types */
+  if (a->type != b->type) {
+    return -EINVAL;
+  }
+
+  /* Blocks are not adjacent */
+  block_len = a->len / bbl->block_size; /* rounds down */
+  if (a->block + block_len != b->block) {
+    return -EINVAL;
+  }
+
+  switch (a->type) {
+    case BACKED_BLOCK_DATA:
+      /* Don't support merging data for now */
+      return -EINVAL;
+    case BACKED_BLOCK_FILL:
+      if (a->fill.val != b->fill.val) {
+        return -EINVAL;
+      }
+      break;
+    case BACKED_BLOCK_FILE:
+      /* Already make sure b->type is BACKED_BLOCK_FILE */
+      if (strcmp(a->file.filename, b->file.filename) || a->file.offset + a->len != b->file.offset) {
+        return -EINVAL;
+      }
+      break;
+    case BACKED_BLOCK_FD:
+      if (a->fd.fd != b->fd.fd || a->fd.offset + a->len != b->fd.offset) {
+        return -EINVAL;
+      }
+      break;
+  }
+
+  /* Blocks are compatible and adjacent, with a before b.  Merge b into a,
+   * and free b */
+  a->len += b->len;
+  a->next = b->next;
+
+  backed_block_destroy(b);
+
+  return 0;
+}
+
+static int queue_bb(struct backed_block_list* bbl, struct backed_block* new_bb) {
+  struct backed_block* bb;
+
+  if (bbl->data_blocks == NULL) {
+    bbl->data_blocks = new_bb;
+    return 0;
+  }
+
+  if (bbl->data_blocks->block > new_bb->block) {
+    new_bb->next = bbl->data_blocks;
+    bbl->data_blocks = new_bb;
+    return 0;
+  }
+
+  /* Optimization: blocks are mostly queued in sequence, so save the
+     pointer to the last bb that was added, and start searching from
+     there if the next block number is higher */
+  if (bbl->last_used && new_bb->block > bbl->last_used->block)
+    bb = bbl->last_used;
+  else
+    bb = bbl->data_blocks;
+  bbl->last_used = new_bb;
+
+  for (; bb->next && bb->next->block < new_bb->block; bb = bb->next)
+    ;
+
+  if (bb->next == NULL) {
+    bb->next = new_bb;
+  } else {
+    new_bb->next = bb->next;
+    bb->next = new_bb;
+  }
+
+  merge_bb(bbl, new_bb, new_bb->next);
+  if (!merge_bb(bbl, bb, new_bb)) {
+    /* new_bb destroyed, point to retained as last_used */
+    bbl->last_used = bb;
+  }
+
+  return 0;
+}
+
+/* Queues a fill block of memory to be written to the specified data blocks */
+int backed_block_add_fill(struct backed_block_list* bbl, unsigned int fill_val, unsigned int len,
+                          unsigned int block) {
+  struct backed_block* bb = reinterpret_cast<backed_block*>(calloc(1, sizeof(struct backed_block)));
+  if (bb == NULL) {
+    return -ENOMEM;
+  }
+
+  bb->block = block;
+  bb->len = len;
+  bb->type = BACKED_BLOCK_FILL;
+  bb->fill.val = fill_val;
+  bb->next = NULL;
+
+  return queue_bb(bbl, bb);
+}
+
+/* Queues a block of memory to be written to the specified data blocks */
+int backed_block_add_data(struct backed_block_list* bbl, void* data, unsigned int len,
+                          unsigned int block) {
+  struct backed_block* bb = reinterpret_cast<backed_block*>(calloc(1, sizeof(struct backed_block)));
+  if (bb == NULL) {
+    return -ENOMEM;
+  }
+
+  bb->block = block;
+  bb->len = len;
+  bb->type = BACKED_BLOCK_DATA;
+  bb->data.data = data;
+  bb->next = NULL;
+
+  return queue_bb(bbl, bb);
+}
+
+/* Queues a chunk of a file on disk to be written to the specified data blocks */
+int backed_block_add_file(struct backed_block_list* bbl, const char* filename, int64_t offset,
+                          unsigned int len, unsigned int block) {
+  struct backed_block* bb = reinterpret_cast<backed_block*>(calloc(1, sizeof(struct backed_block)));
+  if (bb == NULL) {
+    return -ENOMEM;
+  }
+
+  bb->block = block;
+  bb->len = len;
+  bb->type = BACKED_BLOCK_FILE;
+  bb->file.filename = strdup(filename);
+  bb->file.offset = offset;
+  bb->next = NULL;
+
+  return queue_bb(bbl, bb);
+}
+
+/* Queues a chunk of a fd to be written to the specified data blocks */
+int backed_block_add_fd(struct backed_block_list* bbl, int fd, int64_t offset, unsigned int len,
+                        unsigned int block) {
+  struct backed_block* bb = reinterpret_cast<backed_block*>(calloc(1, sizeof(struct backed_block)));
+  if (bb == NULL) {
+    return -ENOMEM;
+  }
+
+  bb->block = block;
+  bb->len = len;
+  bb->type = BACKED_BLOCK_FD;
+  bb->fd.fd = fd;
+  bb->fd.offset = offset;
+  bb->next = NULL;
+
+  return queue_bb(bbl, bb);
+}
+
+int backed_block_split(struct backed_block_list* bbl, struct backed_block* bb,
+                       unsigned int max_len) {
+  struct backed_block* new_bb;
+
+  max_len = ALIGN_DOWN(max_len, bbl->block_size);
+
+  if (bb->len <= max_len) {
+    return 0;
+  }
+
+  new_bb = reinterpret_cast<backed_block*>(malloc(sizeof(struct backed_block)));
+  if (new_bb == NULL) {
+    return -ENOMEM;
+  }
+
+  *new_bb = *bb;
+
+  new_bb->len = bb->len - max_len;
+  new_bb->block = bb->block + max_len / bbl->block_size;
+  new_bb->next = bb->next;
+  bb->next = new_bb;
+  bb->len = max_len;
+
+  switch (bb->type) {
+    case BACKED_BLOCK_DATA:
+      new_bb->data.data = (char*)bb->data.data + max_len;
+      break;
+    case BACKED_BLOCK_FILE:
+      new_bb->file.offset += max_len;
+      break;
+    case BACKED_BLOCK_FD:
+      new_bb->fd.offset += max_len;
+      break;
+    case BACKED_BLOCK_FILL:
+      break;
+  }
+
+  return 0;
+}
diff --git a/libsparse/backed_block.h b/libsparse/backed_block.h
index 1a159be..3a75460 100644
--- a/libsparse/backed_block.h
+++ b/libsparse/backed_block.h
@@ -23,42 +23,40 @@
 struct backed_block;
 
 enum backed_block_type {
-	BACKED_BLOCK_DATA,
-	BACKED_BLOCK_FILE,
-	BACKED_BLOCK_FD,
-	BACKED_BLOCK_FILL,
+  BACKED_BLOCK_DATA,
+  BACKED_BLOCK_FILE,
+  BACKED_BLOCK_FD,
+  BACKED_BLOCK_FILL,
 };
 
-int backed_block_add_data(struct backed_block_list *bbl, void *data,
-		unsigned int len, unsigned int block);
-int backed_block_add_fill(struct backed_block_list *bbl, unsigned int fill_val,
-		unsigned int len, unsigned int block);
-int backed_block_add_file(struct backed_block_list *bbl, const char *filename,
-		int64_t offset, unsigned int len, unsigned int block);
-int backed_block_add_fd(struct backed_block_list *bbl, int fd,
-		int64_t offset, unsigned int len, unsigned int block);
+int backed_block_add_data(struct backed_block_list* bbl, void* data, unsigned int len,
+                          unsigned int block);
+int backed_block_add_fill(struct backed_block_list* bbl, unsigned int fill_val, unsigned int len,
+                          unsigned int block);
+int backed_block_add_file(struct backed_block_list* bbl, const char* filename, int64_t offset,
+                          unsigned int len, unsigned int block);
+int backed_block_add_fd(struct backed_block_list* bbl, int fd, int64_t offset, unsigned int len,
+                        unsigned int block);
 
-struct backed_block *backed_block_iter_new(struct backed_block_list *bbl);
-struct backed_block *backed_block_iter_next(struct backed_block *bb);
-unsigned int backed_block_len(struct backed_block *bb);
-unsigned int backed_block_block(struct backed_block *bb);
-void *backed_block_data(struct backed_block *bb);
-const char *backed_block_filename(struct backed_block *bb);
-int backed_block_fd(struct backed_block *bb);
-int64_t backed_block_file_offset(struct backed_block *bb);
-uint32_t backed_block_fill_val(struct backed_block *bb);
-enum backed_block_type backed_block_type(struct backed_block *bb);
-int backed_block_split(struct backed_block_list *bbl, struct backed_block *bb,
-		unsigned int max_len);
+struct backed_block* backed_block_iter_new(struct backed_block_list* bbl);
+struct backed_block* backed_block_iter_next(struct backed_block* bb);
+unsigned int backed_block_len(struct backed_block* bb);
+unsigned int backed_block_block(struct backed_block* bb);
+void* backed_block_data(struct backed_block* bb);
+const char* backed_block_filename(struct backed_block* bb);
+int backed_block_fd(struct backed_block* bb);
+int64_t backed_block_file_offset(struct backed_block* bb);
+uint32_t backed_block_fill_val(struct backed_block* bb);
+enum backed_block_type backed_block_type(struct backed_block* bb);
+int backed_block_split(struct backed_block_list* bbl, struct backed_block* bb, unsigned int max_len);
 
-struct backed_block *backed_block_iter_new(struct backed_block_list *bbl);
-struct backed_block *backed_block_iter_next(struct backed_block *bb);
+struct backed_block* backed_block_iter_new(struct backed_block_list* bbl);
+struct backed_block* backed_block_iter_next(struct backed_block* bb);
 
-struct backed_block_list *backed_block_list_new(unsigned int block_size);
-void backed_block_list_destroy(struct backed_block_list *bbl);
+struct backed_block_list* backed_block_list_new(unsigned int block_size);
+void backed_block_list_destroy(struct backed_block_list* bbl);
 
-void backed_block_list_move(struct backed_block_list *from,
-		struct backed_block_list *to, struct backed_block *start,
-		struct backed_block *end);
+void backed_block_list_move(struct backed_block_list* from, struct backed_block_list* to,
+                            struct backed_block* start, struct backed_block* end);
 
 #endif
diff --git a/libsparse/defs.h b/libsparse/defs.h
index 34e63c5..28e5cab 100644
--- a/libsparse/defs.h
+++ b/libsparse/defs.h
@@ -17,7 +17,7 @@
 #ifndef _LIBSPARSE_DEFS_H_
 
 #ifndef __unused
-#define __unused        __attribute__((__unused__))
+#define __unused __attribute__((__unused__))
 #endif
 
 #endif /* _LIBSPARSE_DEFS_H_ */
diff --git a/libsparse/img2simg.c b/libsparse/img2simg.c
deleted file mode 100644
index a0db36f..0000000
--- a/libsparse/img2simg.c
+++ /dev/null
@@ -1,115 +0,0 @@
-/*
- * Copyright (C) 2012 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 _FILE_OFFSET_BITS 64
-#define _LARGEFILE64_SOURCE 1
-
-#include <fcntl.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <sparse/sparse.h>
-
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
-
-#if defined(__APPLE__) && defined(__MACH__)
-#define lseek64 lseek
-#define off64_t off_t
-#endif
-
-void usage()
-{
-    fprintf(stderr, "Usage: img2simg <raw_image_file> <sparse_image_file> [<block_size>]\n");
-}
-
-int main(int argc, char *argv[])
-{
-	int in;
-	int out;
-	int ret;
-	struct sparse_file *s;
-	unsigned int block_size = 4096;
-	off64_t len;
-
-	if (argc < 3 || argc > 4) {
-		usage();
-		exit(-1);
-	}
-
-	if (argc == 4) {
-		block_size = atoi(argv[3]);
-	}
-
-	if (block_size < 1024 || block_size % 4 != 0) {
-		usage();
-		exit(-1);
-	}
-
-	if (strcmp(argv[1], "-") == 0) {
-		in = STDIN_FILENO;
-	} else {
-		in = open(argv[1], O_RDONLY | O_BINARY);
-		if (in < 0) {
-			fprintf(stderr, "Cannot open input file %s\n", argv[1]);
-			exit(-1);
-		}
-	}
-
-	if (strcmp(argv[2], "-") == 0) {
-		out = STDOUT_FILENO;
-	} else {
-		out = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
-		if (out < 0) {
-			fprintf(stderr, "Cannot open output file %s\n", argv[2]);
-			exit(-1);
-		}
-	}
-
-	len = lseek64(in, 0, SEEK_END);
-	lseek64(in, 0, SEEK_SET);
-
-	s = sparse_file_new(block_size, len);
-	if (!s) {
-		fprintf(stderr, "Failed to create sparse file\n");
-		exit(-1);
-	}
-
-	sparse_file_verbose(s);
-	ret = sparse_file_read(s, in, false, false);
-	if (ret) {
-		fprintf(stderr, "Failed to read file\n");
-		exit(-1);
-	}
-
-	ret = sparse_file_write(s, out, false, true, false);
-	if (ret) {
-		fprintf(stderr, "Failed to write sparse file\n");
-		exit(-1);
-	}
-
-	close(in);
-	close(out);
-
-	exit(0);
-}
diff --git a/libsparse/img2simg.cpp b/libsparse/img2simg.cpp
new file mode 100644
index 0000000..4c2c6ca
--- /dev/null
+++ b/libsparse/img2simg.cpp
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2012 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 _FILE_OFFSET_BITS 64
+#define _LARGEFILE64_SOURCE 1
+
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <sparse/sparse.h>
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+#if defined(__APPLE__) && defined(__MACH__)
+#define lseek64 lseek
+#define off64_t off_t
+#endif
+
+void usage() {
+  fprintf(stderr, "Usage: img2simg <raw_image_file> <sparse_image_file> [<block_size>]\n");
+}
+
+int main(int argc, char* argv[]) {
+  int in;
+  int out;
+  int ret;
+  struct sparse_file* s;
+  unsigned int block_size = 4096;
+  off64_t len;
+
+  if (argc < 3 || argc > 4) {
+    usage();
+    exit(-1);
+  }
+
+  if (argc == 4) {
+    block_size = atoi(argv[3]);
+  }
+
+  if (block_size < 1024 || block_size % 4 != 0) {
+    usage();
+    exit(-1);
+  }
+
+  if (strcmp(argv[1], "-") == 0) {
+    in = STDIN_FILENO;
+  } else {
+    in = open(argv[1], O_RDONLY | O_BINARY);
+    if (in < 0) {
+      fprintf(stderr, "Cannot open input file %s\n", argv[1]);
+      exit(-1);
+    }
+  }
+
+  if (strcmp(argv[2], "-") == 0) {
+    out = STDOUT_FILENO;
+  } else {
+    out = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
+    if (out < 0) {
+      fprintf(stderr, "Cannot open output file %s\n", argv[2]);
+      exit(-1);
+    }
+  }
+
+  len = lseek64(in, 0, SEEK_END);
+  lseek64(in, 0, SEEK_SET);
+
+  s = sparse_file_new(block_size, len);
+  if (!s) {
+    fprintf(stderr, "Failed to create sparse file\n");
+    exit(-1);
+  }
+
+  sparse_file_verbose(s);
+  ret = sparse_file_read(s, in, false, false);
+  if (ret) {
+    fprintf(stderr, "Failed to read file\n");
+    exit(-1);
+  }
+
+  ret = sparse_file_write(s, out, false, true, false);
+  if (ret) {
+    fprintf(stderr, "Failed to write sparse file\n");
+    exit(-1);
+  }
+
+  close(in);
+  close(out);
+
+  exit(0);
+}
diff --git a/libsparse/include/sparse/sparse.h b/libsparse/include/sparse/sparse.h
index 356f65f..3d5fb0c 100644
--- a/libsparse/include/sparse/sparse.h
+++ b/libsparse/include/sparse/sparse.h
@@ -18,6 +18,7 @@
 #define _LIBSPARSE_SPARSE_H_
 
 #include <stdbool.h>
+#include <stddef.h>
 #include <stdint.h>
 
 #ifdef	__cplusplus
@@ -26,6 +27,11 @@
 
 struct sparse_file;
 
+// The callbacks in sparse_file_callback() and sparse_file_foreach_chunk() take
+// size_t as the length type (was `int` in past). This allows clients to keep
+// their codes compatibile with both versions as needed.
+#define	SPARSE_CALLBACK_USES_SIZE_T
+
 /**
  * sparse_file_new - create a new sparse file cookie
  *
@@ -201,7 +207,7 @@
  * Returns 0 on success, negative errno on error.
  */
 int sparse_file_callback(struct sparse_file *s, bool sparse, bool crc,
-		int (*write)(void *priv, const void *data, int len), void *priv);
+		int (*write)(void *priv, const void *data, size_t len), void *priv);
 
 /**
  * sparse_file_foreach_chunk - call a callback for data blocks in sparse file
@@ -218,7 +224,7 @@
  * Returns 0 on success, negative errno on error.
  */
 int sparse_file_foreach_chunk(struct sparse_file *s, bool sparse, bool crc,
-	int (*write)(void *priv, const void *data, int len, unsigned int block,
+	int (*write)(void *priv, const void *data, size_t len, unsigned int block,
 		     unsigned int nr_blocks),
 	void *priv);
 /**
@@ -240,9 +246,24 @@
 int sparse_file_read(struct sparse_file *s, int fd, bool sparse, bool crc);
 
 /**
- * sparse_file_import - import an existing sparse file
+ * sparse_file_read_buf - read a buffer into a sparse file cookie
  *
  * @s - sparse file cookie
+ * @buf - buffer to read from
+ * @crc - verify the crc of a file in the Android sparse file format
+ *
+ * Reads a buffer into a sparse file cookie. The buffer must remain
+ * valid until the sparse file cookie is freed. If crc is true, the
+ * crc of the sparse file will be verified.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int sparse_file_read_buf(struct sparse_file *s, char *buf, bool crc);
+
+/**
+ * sparse_file_import - import an existing sparse file
+ *
+ * @fd - file descriptor to read from
  * @verbose - print verbose errors while reading the sparse file
  * @crc - verify the crc of a file in the Android sparse file format
  *
@@ -255,6 +276,21 @@
 struct sparse_file *sparse_file_import(int fd, bool verbose, bool crc);
 
 /**
+ * sparse_file_import_buf - import an existing sparse file from a buffer
+ *
+ * @buf - buffer to read from
+ * @verbose - print verbose errors while reading the sparse file
+ * @crc - verify the crc of a file in the Android sparse file format
+ *
+ * Reads existing sparse file data into a sparse file cookie, recreating the same
+ * sparse cookie that was used to write it.  If verbose is true, prints verbose
+ * errors when the sparse file is formatted incorrectly.
+ *
+ * Returns a new sparse file cookie on success, NULL on error.
+ */
+struct sparse_file *sparse_file_import_buf(char* buf, bool verbose, bool crc);
+
+/**
  * sparse_file_import_auto - import an existing sparse or normal file
  *
  * @fd - file descriptor to read from
diff --git a/libsparse/output_file.c b/libsparse/output_file.c
deleted file mode 100644
index 51e60ef..0000000
--- a/libsparse/output_file.c
+++ /dev/null
@@ -1,775 +0,0 @@
-/*
- * Copyright (C) 2010 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 _FILE_OFFSET_BITS 64
-#define _LARGEFILE64_SOURCE 1
-
-#include <fcntl.h>
-#include <inttypes.h>
-#include <limits.h>
-#include <stdbool.h>
-#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <zlib.h>
-
-#include "defs.h"
-#include "output_file.h"
-#include "sparse_crc32.h"
-#include "sparse_format.h"
-
-#ifndef _WIN32
-#include <sys/mman.h>
-#define O_BINARY 0
-#else
-#define ftruncate64 ftruncate
-#endif
-
-#if defined(__APPLE__) && defined(__MACH__)
-#define lseek64 lseek
-#define ftruncate64 ftruncate
-#define mmap64 mmap
-#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))
-#define CHUNK_HEADER_LEN (sizeof(chunk_header_t))
-
-#define container_of(inner, outer_t, elem) \
-	((outer_t *)((char *)(inner) - offsetof(outer_t, elem)))
-
-struct output_file_ops {
-	int (*open)(struct output_file *, int fd);
-	int (*skip)(struct output_file *, int64_t);
-	int (*pad)(struct output_file *, int64_t);
-	int (*write)(struct output_file *, void *, size_t);
-	void (*close)(struct output_file *);
-};
-
-struct sparse_file_ops {
-	int (*write_data_chunk)(struct output_file *out, unsigned int len,
-			void *data);
-	int (*write_fill_chunk)(struct output_file *out, unsigned int len,
-			uint32_t fill_val);
-	int (*write_skip_chunk)(struct output_file *out, int64_t len);
-	int (*write_end_chunk)(struct output_file *out);
-};
-
-struct output_file {
-	int64_t cur_out_ptr;
-	unsigned int chunk_cnt;
-	uint32_t crc32;
-	struct output_file_ops *ops;
-	struct sparse_file_ops *sparse_ops;
-	int use_crc;
-	unsigned int block_size;
-	int64_t len;
-	char *zero_buf;
-	uint32_t *fill_buf;
-	char *buf;
-};
-
-struct output_file_gz {
-	struct output_file out;
-	gzFile gz_fd;
-};
-
-#define to_output_file_gz(_o) \
-	container_of((_o), struct output_file_gz, out)
-
-struct output_file_normal {
-	struct output_file out;
-	int fd;
-};
-
-#define to_output_file_normal(_o) \
-	container_of((_o), struct output_file_normal, out)
-
-struct output_file_callback {
-	struct output_file out;
-	void *priv;
-	int (*write)(void *priv, const void *buf, int len);
-};
-
-#define to_output_file_callback(_o) \
-	container_of((_o), struct output_file_callback, out)
-
-static int file_open(struct output_file *out, int fd)
-{
-	struct output_file_normal *outn = to_output_file_normal(out);
-
-	outn->fd = fd;
-	return 0;
-}
-
-static int file_skip(struct output_file *out, int64_t cnt)
-{
-	off64_t ret;
-	struct output_file_normal *outn = to_output_file_normal(out);
-
-	ret = lseek64(outn->fd, cnt, SEEK_CUR);
-	if (ret < 0) {
-		error_errno("lseek64");
-		return -1;
-	}
-	return 0;
-}
-
-static int file_pad(struct output_file *out, int64_t len)
-{
-	int ret;
-	struct output_file_normal *outn = to_output_file_normal(out);
-
-	ret = ftruncate64(outn->fd, len);
-	if (ret < 0) {
-		return -errno;
-	}
-
-	return 0;
-}
-
-static int file_write(struct output_file *out, void *data, size_t len)
-{
-	ssize_t ret;
-	struct output_file_normal *outn = to_output_file_normal(out);
-
-	while (len > 0) {
-		ret = write(outn->fd, data, len);
-		if (ret < 0) {
-			if (errno == EINTR) {
-				continue;
-			}
-			error_errno("write");
-			return -1;
-		}
-
-		data = (char *)data + ret;
-		len -= ret;
-	}
-
-	return 0;
-}
-
-static void file_close(struct output_file *out)
-{
-	struct output_file_normal *outn = to_output_file_normal(out);
-
-	free(outn);
-}
-
-static struct output_file_ops file_ops = {
-	.open = file_open,
-	.skip = file_skip,
-	.pad = file_pad,
-	.write = file_write,
-	.close = file_close,
-};
-
-static int gz_file_open(struct output_file *out, int fd)
-{
-	struct output_file_gz *outgz = to_output_file_gz(out);
-
-	outgz->gz_fd = gzdopen(fd, "wb9");
-	if (!outgz->gz_fd) {
-		error_errno("gzopen");
-		return -errno;
-	}
-
-	return 0;
-}
-
-
-static int gz_file_skip(struct output_file *out, int64_t cnt)
-{
-	off64_t ret;
-	struct output_file_gz *outgz = to_output_file_gz(out);
-
-	ret = gzseek(outgz->gz_fd, cnt, SEEK_CUR);
-	if (ret < 0) {
-		error_errno("gzseek");
-		return -1;
-	}
-	return 0;
-}
-
-static int gz_file_pad(struct output_file *out, int64_t len)
-{
-	off64_t ret;
-	struct output_file_gz *outgz = to_output_file_gz(out);
-
-	ret = gztell(outgz->gz_fd);
-	if (ret < 0) {
-		return -1;
-	}
-
-	if (ret >= len) {
-		return 0;
-	}
-
-	ret = gzseek(outgz->gz_fd, len - 1, SEEK_SET);
-	if (ret < 0) {
-		return -1;
-	}
-
-	gzwrite(outgz->gz_fd, "", 1);
-
-	return 0;
-}
-
-static int gz_file_write(struct output_file *out, void *data, size_t len)
-{
-	int ret;
-	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));
-		if (ret == 0) {
-			error("gzwrite %s", gzerror(outgz->gz_fd, NULL));
-			return -1;
-		}
-		len -= ret;
-		data = (char *)data + ret;
-	}
-
-	return 0;
-}
-
-static void gz_file_close(struct output_file *out)
-{
-	struct output_file_gz *outgz = to_output_file_gz(out);
-
-	gzclose(outgz->gz_fd);
-	free(outgz);
-}
-
-static struct output_file_ops gz_file_ops = {
-	.open = gz_file_open,
-	.skip = gz_file_skip,
-	.pad = gz_file_pad,
-	.write = gz_file_write,
-	.close = gz_file_close,
-};
-
-static int callback_file_open(struct output_file *out __unused, int fd __unused)
-{
-	return 0;
-}
-
-static int callback_file_skip(struct output_file *out, int64_t off)
-{
-	struct output_file_callback *outc = to_output_file_callback(out);
-	int to_write;
-	int ret;
-
-	while (off > 0) {
-		to_write = min(off, (int64_t)INT_MAX);
-		ret = outc->write(outc->priv, NULL, to_write);
-		if (ret < 0) {
-			return ret;
-		}
-		off -= to_write;
-	}
-
-	return 0;
-}
-
-static int callback_file_pad(struct output_file *out __unused, int64_t len __unused)
-{
-	return -1;
-}
-
-static int callback_file_write(struct output_file *out, void *data, size_t len)
-{
-	struct output_file_callback *outc = to_output_file_callback(out);
-
-	return outc->write(outc->priv, data, len);
-}
-
-static void callback_file_close(struct output_file *out)
-{
-	struct output_file_callback *outc = to_output_file_callback(out);
-
-	free(outc);
-}
-
-static struct output_file_ops callback_file_ops = {
-	.open = callback_file_open,
-	.skip = callback_file_skip,
-	.pad = callback_file_pad,
-	.write = callback_file_write,
-	.close = callback_file_close,
-};
-
-int read_all(int fd, void *buf, size_t len)
-{
-	size_t total = 0;
-	int ret;
-	char *ptr = buf;
-
-	while (total < len) {
-		ret = read(fd, ptr, len - total);
-
-		if (ret < 0)
-			return -errno;
-
-		if (ret == 0)
-			return -EINVAL;
-
-		ptr += ret;
-		total += ret;
-	}
-
-	return 0;
-}
-
-static int write_sparse_skip_chunk(struct output_file *out, int64_t skip_len)
-{
-	chunk_header_t chunk_header;
-	int ret;
-
-	if (skip_len % out->block_size) {
-		error("don't care size %"PRIi64" is not a multiple of the block size %u",
-				skip_len, out->block_size);
-		return -1;
-	}
-
-	/* We are skipping data, so emit a don't care chunk. */
-	chunk_header.chunk_type = CHUNK_TYPE_DONT_CARE;
-	chunk_header.reserved1 = 0;
-	chunk_header.chunk_sz = skip_len / out->block_size;
-	chunk_header.total_sz = CHUNK_HEADER_LEN;
-	ret = out->ops->write(out, &chunk_header, sizeof(chunk_header));
-	if (ret < 0)
-		return -1;
-
-	out->cur_out_ptr += skip_len;
-	out->chunk_cnt++;
-
-	return 0;
-}
-
-static int write_sparse_fill_chunk(struct output_file *out, unsigned int len,
-		uint32_t fill_val)
-{
-	chunk_header_t chunk_header;
-	int rnd_up_len, count;
-	int ret;
-
-	/* Round up the fill length to a multiple of the block size */
-	rnd_up_len = ALIGN(len, out->block_size);
-
-	/* Finally we can safely emit a chunk of data */
-	chunk_header.chunk_type = CHUNK_TYPE_FILL;
-	chunk_header.reserved1 = 0;
-	chunk_header.chunk_sz = rnd_up_len / out->block_size;
-	chunk_header.total_sz = CHUNK_HEADER_LEN + sizeof(fill_val);
-	ret = out->ops->write(out, &chunk_header, sizeof(chunk_header));
-
-	if (ret < 0)
-		return -1;
-	ret = out->ops->write(out, &fill_val, sizeof(fill_val));
-	if (ret < 0)
-		return -1;
-
-	if (out->use_crc) {
-		count = out->block_size / sizeof(uint32_t);
-		while (count--)
-			out->crc32 = sparse_crc32(out->crc32, &fill_val, sizeof(uint32_t));
-	}
-
-	out->cur_out_ptr += rnd_up_len;
-	out->chunk_cnt++;
-
-	return 0;
-}
-
-static int write_sparse_data_chunk(struct output_file *out, unsigned int len,
-		void *data)
-{
-	chunk_header_t chunk_header;
-	int rnd_up_len, zero_len;
-	int ret;
-
-	/* Round up the data length to a multiple of the block size */
-	rnd_up_len = ALIGN(len, out->block_size);
-	zero_len = rnd_up_len - len;
-
-	/* Finally we can safely emit a chunk of data */
-	chunk_header.chunk_type = CHUNK_TYPE_RAW;
-	chunk_header.reserved1 = 0;
-	chunk_header.chunk_sz = rnd_up_len / out->block_size;
-	chunk_header.total_sz = CHUNK_HEADER_LEN + rnd_up_len;
-	ret = out->ops->write(out, &chunk_header, sizeof(chunk_header));
-
-	if (ret < 0)
-		return -1;
-	ret = out->ops->write(out, data, len);
-	if (ret < 0)
-		return -1;
-	if (zero_len) {
-		ret = out->ops->write(out, out->zero_buf, zero_len);
-		if (ret < 0)
-			return -1;
-	}
-
-	if (out->use_crc) {
-		out->crc32 = sparse_crc32(out->crc32, data, len);
-		if (zero_len)
-			out->crc32 = sparse_crc32(out->crc32, out->zero_buf, zero_len);
-	}
-
-	out->cur_out_ptr += rnd_up_len;
-	out->chunk_cnt++;
-
-	return 0;
-}
-
-int write_sparse_end_chunk(struct output_file *out)
-{
-	chunk_header_t chunk_header;
-	int ret;
-
-	if (out->use_crc) {
-		chunk_header.chunk_type = CHUNK_TYPE_CRC32;
-		chunk_header.reserved1 = 0;
-		chunk_header.chunk_sz = 0;
-		chunk_header.total_sz = CHUNK_HEADER_LEN + 4;
-
-		ret = out->ops->write(out, &chunk_header, sizeof(chunk_header));
-		if (ret < 0) {
-			return ret;
-		}
-		out->ops->write(out, &out->crc32, 4);
-		if (ret < 0) {
-			return ret;
-		}
-
-		out->chunk_cnt++;
-	}
-
-	return 0;
-}
-
-static struct sparse_file_ops sparse_file_ops = {
-		.write_data_chunk = write_sparse_data_chunk,
-		.write_fill_chunk = write_sparse_fill_chunk,
-		.write_skip_chunk = write_sparse_skip_chunk,
-		.write_end_chunk = write_sparse_end_chunk,
-};
-
-static int write_normal_data_chunk(struct output_file *out, unsigned int len,
-		void *data)
-{
-	int ret;
-	unsigned int rnd_up_len = ALIGN(len, out->block_size);
-
-	ret = out->ops->write(out, data, len);
-	if (ret < 0) {
-		return ret;
-	}
-
-	if (rnd_up_len > len) {
-		ret = out->ops->skip(out, rnd_up_len - len);
-	}
-
-	return ret;
-}
-
-static int write_normal_fill_chunk(struct output_file *out, unsigned int len,
-		uint32_t fill_val)
-{
-	int ret;
-	unsigned int i;
-	unsigned int write_len;
-
-	/* Initialize fill_buf with the fill_val */
-	for (i = 0; i < out->block_size / sizeof(uint32_t); i++) {
-		out->fill_buf[i] = fill_val;
-	}
-
-	while (len) {
-		write_len = min(len, out->block_size);
-		ret = out->ops->write(out, out->fill_buf, write_len);
-		if (ret < 0) {
-			return ret;
-		}
-
-		len -= write_len;
-	}
-
-	return 0;
-}
-
-static int write_normal_skip_chunk(struct output_file *out, int64_t len)
-{
-	return out->ops->skip(out, len);
-}
-
-int write_normal_end_chunk(struct output_file *out)
-{
-	return out->ops->pad(out, out->len);
-}
-
-static struct sparse_file_ops normal_file_ops = {
-		.write_data_chunk = write_normal_data_chunk,
-		.write_fill_chunk = write_normal_fill_chunk,
-		.write_skip_chunk = write_normal_skip_chunk,
-		.write_end_chunk = write_normal_end_chunk,
-};
-
-void output_file_close(struct output_file *out)
-{
-	out->sparse_ops->write_end_chunk(out);
-	out->ops->close(out);
-}
-
-static int output_file_init(struct output_file *out, int block_size,
-		int64_t len, bool sparse, int chunks, bool crc)
-{
-	int ret;
-
-	out->len = len;
-	out->block_size = block_size;
-	out->cur_out_ptr = 0ll;
-	out->chunk_cnt = 0;
-	out->crc32 = 0;
-	out->use_crc = crc;
-
-	out->zero_buf = calloc(block_size, 1);
-	if (!out->zero_buf) {
-		error_errno("malloc zero_buf");
-		return -ENOMEM;
-	}
-
-	out->fill_buf = calloc(block_size, 1);
-	if (!out->fill_buf) {
-		error_errno("malloc fill_buf");
-		ret = -ENOMEM;
-		goto err_fill_buf;
-	}
-
-	if (sparse) {
-		out->sparse_ops = &sparse_file_ops;
-	} else {
-		out->sparse_ops = &normal_file_ops;
-	}
-
-	if (sparse) {
-		sparse_header_t sparse_header = {
-				.magic = SPARSE_HEADER_MAGIC,
-				.major_version = SPARSE_HEADER_MAJOR_VER,
-				.minor_version = SPARSE_HEADER_MINOR_VER,
-				.file_hdr_sz = SPARSE_HEADER_LEN,
-				.chunk_hdr_sz = CHUNK_HEADER_LEN,
-				.blk_sz = out->block_size,
-				.total_blks = DIV_ROUND_UP(out->len, out->block_size),
-				.total_chunks = chunks,
-				.image_checksum = 0
-		};
-
-		if (out->use_crc) {
-			sparse_header.total_chunks++;
-		}
-
-		ret = out->ops->write(out, &sparse_header, sizeof(sparse_header));
-		if (ret < 0) {
-			goto err_write;
-		}
-	}
-
-	return 0;
-
-err_write:
-	free(out->fill_buf);
-err_fill_buf:
-	free(out->zero_buf);
-	return ret;
-}
-
-static struct output_file *output_file_new_gz(void)
-{
-	struct output_file_gz *outgz = calloc(1, sizeof(struct output_file_gz));
-	if (!outgz) {
-		error_errno("malloc struct outgz");
-		return NULL;
-	}
-
-	outgz->out.ops = &gz_file_ops;
-
-	return &outgz->out;
-}
-
-static struct output_file *output_file_new_normal(void)
-{
-	struct output_file_normal *outn = calloc(1, sizeof(struct output_file_normal));
-	if (!outn) {
-		error_errno("malloc struct outn");
-		return NULL;
-	}
-
-	outn->out.ops = &file_ops;
-
-	return &outn->out;
-}
-
-struct output_file *output_file_open_callback(int (*write)(void *, const void *, int),
-		void *priv, unsigned int block_size, int64_t len,
-		int gz __unused, int sparse, int chunks, int crc)
-{
-	int ret;
-	struct output_file_callback *outc;
-
-	outc = calloc(1, sizeof(struct output_file_callback));
-	if (!outc) {
-		error_errno("malloc struct outc");
-		return NULL;
-	}
-
-	outc->out.ops = &callback_file_ops;
-	outc->priv = priv;
-	outc->write = write;
-
-	ret = output_file_init(&outc->out, block_size, len, sparse, chunks, crc);
-	if (ret < 0) {
-		free(outc);
-		return NULL;
-	}
-
-	return &outc->out;
-}
-
-struct output_file *output_file_open_fd(int fd, unsigned int block_size, int64_t len,
-		int gz, int sparse, int chunks, int crc)
-{
-	int ret;
-	struct output_file *out;
-
-	if (gz) {
-		out = output_file_new_gz();
-	} else {
-		out = output_file_new_normal();
-	}
-	if (!out) {
-		return NULL;
-	}
-
-	out->ops->open(out, fd);
-
-	ret = output_file_init(out, block_size, len, sparse, chunks, crc);
-	if (ret < 0) {
-		free(out);
-		return NULL;
-	}
-
-	return out;
-}
-
-/* Write a contiguous region of data blocks from a memory buffer */
-int write_data_chunk(struct output_file *out, unsigned int len, void *data)
-{
-	return out->sparse_ops->write_data_chunk(out, len, data);
-}
-
-/* Write a contiguous region of data blocks with a fill value */
-int write_fill_chunk(struct output_file *out, unsigned int len,
-		uint32_t fill_val)
-{
-	return out->sparse_ops->write_fill_chunk(out, len, fill_val);
-}
-
-int write_fd_chunk(struct output_file *out, unsigned int len,
-		int fd, int64_t offset)
-{
-	int ret;
-	int64_t aligned_offset;
-	int aligned_diff;
-	uint64_t buffer_size;
-	char *ptr;
-
-	aligned_offset = offset & ~(4096 - 1);
-	aligned_diff = offset - aligned_offset;
-	buffer_size = (uint64_t)len + (uint64_t)aligned_diff;
-
-#ifndef _WIN32
-	if (buffer_size > SIZE_MAX)
-		return -E2BIG;
-	char *data = mmap64(NULL, buffer_size, PROT_READ, MAP_SHARED, fd,
-			aligned_offset);
-	if (data == MAP_FAILED) {
-		return -errno;
-	}
-	ptr = data + aligned_diff;
-#else
-	off64_t pos;
-	char *data = malloc(len);
-	if (!data) {
-		return -errno;
-	}
-	pos = lseek64(fd, offset, SEEK_SET);
-	if (pos < 0) {
-                free(data);
-		return -errno;
-	}
-	ret = read_all(fd, data, len);
-	if (ret < 0) {
-                free(data);
-		return ret;
-	}
-	ptr = data;
-#endif
-
-	ret = out->sparse_ops->write_data_chunk(out, len, ptr);
-
-#ifndef _WIN32
-	munmap(data, buffer_size);
-#else
-	free(data);
-#endif
-
-	return ret;
-}
-
-/* Write a contiguous region of data blocks from a file */
-int write_file_chunk(struct output_file *out, unsigned int len,
-		const char *file, int64_t offset)
-{
-	int ret;
-
-	int file_fd = open(file, O_RDONLY | O_BINARY);
-	if (file_fd < 0) {
-		return -errno;
-	}
-
-	ret = write_fd_chunk(out, len, file_fd, offset);
-
-	close(file_fd);
-
-	return ret;
-}
-
-int write_skip_chunk(struct output_file *out, int64_t len)
-{
-	return out->sparse_ops->write_skip_chunk(out, len);
-}
diff --git a/libsparse/output_file.cpp b/libsparse/output_file.cpp
new file mode 100644
index 0000000..5388e77
--- /dev/null
+++ b/libsparse/output_file.cpp
@@ -0,0 +1,720 @@
+/*
+ * Copyright (C) 2010 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 _FILE_OFFSET_BITS 64
+#define _LARGEFILE64_SOURCE 1
+
+#include <fcntl.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <zlib.h>
+
+#include "defs.h"
+#include "output_file.h"
+#include "sparse_crc32.h"
+#include "sparse_format.h"
+
+#ifndef _WIN32
+#include <sys/mman.h>
+#define O_BINARY 0
+#else
+#define ftruncate64 ftruncate
+#endif
+
+#if defined(__APPLE__) && defined(__MACH__)
+#define lseek64 lseek
+#define ftruncate64 ftruncate
+#define mmap64 mmap
+#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))
+#define CHUNK_HEADER_LEN (sizeof(chunk_header_t))
+
+#define container_of(inner, outer_t, elem) ((outer_t*)((char*)(inner)-offsetof(outer_t, elem)))
+
+struct output_file_ops {
+  int (*open)(struct output_file*, int fd);
+  int (*skip)(struct output_file*, int64_t);
+  int (*pad)(struct output_file*, int64_t);
+  int (*write)(struct output_file*, void*, size_t);
+  void (*close)(struct output_file*);
+};
+
+struct sparse_file_ops {
+  int (*write_data_chunk)(struct output_file* out, unsigned int len, void* data);
+  int (*write_fill_chunk)(struct output_file* out, unsigned int len, uint32_t fill_val);
+  int (*write_skip_chunk)(struct output_file* out, int64_t len);
+  int (*write_end_chunk)(struct output_file* out);
+};
+
+struct output_file {
+  int64_t cur_out_ptr;
+  unsigned int chunk_cnt;
+  uint32_t crc32;
+  struct output_file_ops* ops;
+  struct sparse_file_ops* sparse_ops;
+  int use_crc;
+  unsigned int block_size;
+  int64_t len;
+  char* zero_buf;
+  uint32_t* fill_buf;
+  char* buf;
+};
+
+struct output_file_gz {
+  struct output_file out;
+  gzFile gz_fd;
+};
+
+#define to_output_file_gz(_o) container_of((_o), struct output_file_gz, out)
+
+struct output_file_normal {
+  struct output_file out;
+  int fd;
+};
+
+#define to_output_file_normal(_o) container_of((_o), struct output_file_normal, out)
+
+struct output_file_callback {
+  struct output_file out;
+  void* priv;
+  int (*write)(void* priv, const void* buf, size_t len);
+};
+
+#define to_output_file_callback(_o) container_of((_o), struct output_file_callback, out)
+
+static int file_open(struct output_file* out, int fd) {
+  struct output_file_normal* outn = to_output_file_normal(out);
+
+  outn->fd = fd;
+  return 0;
+}
+
+static int file_skip(struct output_file* out, int64_t cnt) {
+  off64_t ret;
+  struct output_file_normal* outn = to_output_file_normal(out);
+
+  ret = lseek64(outn->fd, cnt, SEEK_CUR);
+  if (ret < 0) {
+    error_errno("lseek64");
+    return -1;
+  }
+  return 0;
+}
+
+static int file_pad(struct output_file* out, int64_t len) {
+  int ret;
+  struct output_file_normal* outn = to_output_file_normal(out);
+
+  ret = ftruncate64(outn->fd, len);
+  if (ret < 0) {
+    return -errno;
+  }
+
+  return 0;
+}
+
+static int file_write(struct output_file* out, void* data, size_t len) {
+  ssize_t ret;
+  struct output_file_normal* outn = to_output_file_normal(out);
+
+  while (len > 0) {
+    ret = write(outn->fd, data, len);
+    if (ret < 0) {
+      if (errno == EINTR) {
+        continue;
+      }
+      error_errno("write");
+      return -1;
+    }
+
+    data = (char*)data + ret;
+    len -= ret;
+  }
+
+  return 0;
+}
+
+static void file_close(struct output_file* out) {
+  struct output_file_normal* outn = to_output_file_normal(out);
+
+  free(outn);
+}
+
+static struct output_file_ops file_ops = {
+    .open = file_open,
+    .skip = file_skip,
+    .pad = file_pad,
+    .write = file_write,
+    .close = file_close,
+};
+
+static int gz_file_open(struct output_file* out, int fd) {
+  struct output_file_gz* outgz = to_output_file_gz(out);
+
+  outgz->gz_fd = gzdopen(fd, "wb9");
+  if (!outgz->gz_fd) {
+    error_errno("gzopen");
+    return -errno;
+  }
+
+  return 0;
+}
+
+static int gz_file_skip(struct output_file* out, int64_t cnt) {
+  off64_t ret;
+  struct output_file_gz* outgz = to_output_file_gz(out);
+
+  ret = gzseek(outgz->gz_fd, cnt, SEEK_CUR);
+  if (ret < 0) {
+    error_errno("gzseek");
+    return -1;
+  }
+  return 0;
+}
+
+static int gz_file_pad(struct output_file* out, int64_t len) {
+  off64_t ret;
+  struct output_file_gz* outgz = to_output_file_gz(out);
+
+  ret = gztell(outgz->gz_fd);
+  if (ret < 0) {
+    return -1;
+  }
+
+  if (ret >= len) {
+    return 0;
+  }
+
+  ret = gzseek(outgz->gz_fd, len - 1, SEEK_SET);
+  if (ret < 0) {
+    return -1;
+  }
+
+  gzwrite(outgz->gz_fd, "", 1);
+
+  return 0;
+}
+
+static int gz_file_write(struct output_file* out, void* data, size_t len) {
+  int ret;
+  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));
+    if (ret == 0) {
+      error("gzwrite %s", gzerror(outgz->gz_fd, NULL));
+      return -1;
+    }
+    len -= ret;
+    data = (char*)data + ret;
+  }
+
+  return 0;
+}
+
+static void gz_file_close(struct output_file* out) {
+  struct output_file_gz* outgz = to_output_file_gz(out);
+
+  gzclose(outgz->gz_fd);
+  free(outgz);
+}
+
+static struct output_file_ops gz_file_ops = {
+    .open = gz_file_open,
+    .skip = gz_file_skip,
+    .pad = gz_file_pad,
+    .write = gz_file_write,
+    .close = gz_file_close,
+};
+
+static int callback_file_open(struct output_file* out __unused, int fd __unused) {
+  return 0;
+}
+
+static int callback_file_skip(struct output_file* out, int64_t off) {
+  struct output_file_callback* outc = to_output_file_callback(out);
+  int to_write;
+  int ret;
+
+  while (off > 0) {
+    to_write = min(off, (int64_t)INT_MAX);
+    ret = outc->write(outc->priv, NULL, to_write);
+    if (ret < 0) {
+      return ret;
+    }
+    off -= to_write;
+  }
+
+  return 0;
+}
+
+static int callback_file_pad(struct output_file* out __unused, int64_t len __unused) {
+  return -1;
+}
+
+static int callback_file_write(struct output_file* out, void* data, size_t len) {
+  struct output_file_callback* outc = to_output_file_callback(out);
+
+  return outc->write(outc->priv, data, len);
+}
+
+static void callback_file_close(struct output_file* out) {
+  struct output_file_callback* outc = to_output_file_callback(out);
+
+  free(outc);
+}
+
+static struct output_file_ops callback_file_ops = {
+    .open = callback_file_open,
+    .skip = callback_file_skip,
+    .pad = callback_file_pad,
+    .write = callback_file_write,
+    .close = callback_file_close,
+};
+
+int read_all(int fd, void* buf, size_t len) {
+  size_t total = 0;
+  int ret;
+  char* ptr = reinterpret_cast<char*>(buf);
+
+  while (total < len) {
+    ret = read(fd, ptr, len - total);
+
+    if (ret < 0) return -errno;
+
+    if (ret == 0) return -EINVAL;
+
+    ptr += ret;
+    total += ret;
+  }
+
+  return 0;
+}
+
+static int write_sparse_skip_chunk(struct output_file* out, int64_t skip_len) {
+  chunk_header_t chunk_header;
+  int ret;
+
+  if (skip_len % out->block_size) {
+    error("don't care size %" PRIi64 " is not a multiple of the block size %u", skip_len,
+          out->block_size);
+    return -1;
+  }
+
+  /* We are skipping data, so emit a don't care chunk. */
+  chunk_header.chunk_type = CHUNK_TYPE_DONT_CARE;
+  chunk_header.reserved1 = 0;
+  chunk_header.chunk_sz = skip_len / out->block_size;
+  chunk_header.total_sz = CHUNK_HEADER_LEN;
+  ret = out->ops->write(out, &chunk_header, sizeof(chunk_header));
+  if (ret < 0) return -1;
+
+  out->cur_out_ptr += skip_len;
+  out->chunk_cnt++;
+
+  return 0;
+}
+
+static int write_sparse_fill_chunk(struct output_file* out, unsigned int len, uint32_t fill_val) {
+  chunk_header_t chunk_header;
+  int rnd_up_len, count;
+  int ret;
+
+  /* Round up the fill length to a multiple of the block size */
+  rnd_up_len = ALIGN(len, out->block_size);
+
+  /* Finally we can safely emit a chunk of data */
+  chunk_header.chunk_type = CHUNK_TYPE_FILL;
+  chunk_header.reserved1 = 0;
+  chunk_header.chunk_sz = rnd_up_len / out->block_size;
+  chunk_header.total_sz = CHUNK_HEADER_LEN + sizeof(fill_val);
+  ret = out->ops->write(out, &chunk_header, sizeof(chunk_header));
+
+  if (ret < 0) return -1;
+  ret = out->ops->write(out, &fill_val, sizeof(fill_val));
+  if (ret < 0) return -1;
+
+  if (out->use_crc) {
+    count = out->block_size / sizeof(uint32_t);
+    while (count--) out->crc32 = sparse_crc32(out->crc32, &fill_val, sizeof(uint32_t));
+  }
+
+  out->cur_out_ptr += rnd_up_len;
+  out->chunk_cnt++;
+
+  return 0;
+}
+
+static int write_sparse_data_chunk(struct output_file* out, unsigned int len, void* data) {
+  chunk_header_t chunk_header;
+  int rnd_up_len, zero_len;
+  int ret;
+
+  /* Round up the data length to a multiple of the block size */
+  rnd_up_len = ALIGN(len, out->block_size);
+  zero_len = rnd_up_len - len;
+
+  /* Finally we can safely emit a chunk of data */
+  chunk_header.chunk_type = CHUNK_TYPE_RAW;
+  chunk_header.reserved1 = 0;
+  chunk_header.chunk_sz = rnd_up_len / out->block_size;
+  chunk_header.total_sz = CHUNK_HEADER_LEN + rnd_up_len;
+  ret = out->ops->write(out, &chunk_header, sizeof(chunk_header));
+
+  if (ret < 0) return -1;
+  ret = out->ops->write(out, data, len);
+  if (ret < 0) return -1;
+  if (zero_len) {
+    ret = out->ops->write(out, out->zero_buf, zero_len);
+    if (ret < 0) return -1;
+  }
+
+  if (out->use_crc) {
+    out->crc32 = sparse_crc32(out->crc32, data, len);
+    if (zero_len) out->crc32 = sparse_crc32(out->crc32, out->zero_buf, zero_len);
+  }
+
+  out->cur_out_ptr += rnd_up_len;
+  out->chunk_cnt++;
+
+  return 0;
+}
+
+int write_sparse_end_chunk(struct output_file* out) {
+  chunk_header_t chunk_header;
+  int ret;
+
+  if (out->use_crc) {
+    chunk_header.chunk_type = CHUNK_TYPE_CRC32;
+    chunk_header.reserved1 = 0;
+    chunk_header.chunk_sz = 0;
+    chunk_header.total_sz = CHUNK_HEADER_LEN + 4;
+
+    ret = out->ops->write(out, &chunk_header, sizeof(chunk_header));
+    if (ret < 0) {
+      return ret;
+    }
+    out->ops->write(out, &out->crc32, 4);
+    if (ret < 0) {
+      return ret;
+    }
+
+    out->chunk_cnt++;
+  }
+
+  return 0;
+}
+
+static struct sparse_file_ops sparse_file_ops = {
+    .write_data_chunk = write_sparse_data_chunk,
+    .write_fill_chunk = write_sparse_fill_chunk,
+    .write_skip_chunk = write_sparse_skip_chunk,
+    .write_end_chunk = write_sparse_end_chunk,
+};
+
+static int write_normal_data_chunk(struct output_file* out, unsigned int len, void* data) {
+  int ret;
+  unsigned int rnd_up_len = ALIGN(len, out->block_size);
+
+  ret = out->ops->write(out, data, len);
+  if (ret < 0) {
+    return ret;
+  }
+
+  if (rnd_up_len > len) {
+    ret = out->ops->skip(out, rnd_up_len - len);
+  }
+
+  return ret;
+}
+
+static int write_normal_fill_chunk(struct output_file* out, unsigned int len, uint32_t fill_val) {
+  int ret;
+  unsigned int i;
+  unsigned int write_len;
+
+  /* Initialize fill_buf with the fill_val */
+  for (i = 0; i < out->block_size / sizeof(uint32_t); i++) {
+    out->fill_buf[i] = fill_val;
+  }
+
+  while (len) {
+    write_len = min(len, out->block_size);
+    ret = out->ops->write(out, out->fill_buf, write_len);
+    if (ret < 0) {
+      return ret;
+    }
+
+    len -= write_len;
+  }
+
+  return 0;
+}
+
+static int write_normal_skip_chunk(struct output_file* out, int64_t len) {
+  return out->ops->skip(out, len);
+}
+
+int write_normal_end_chunk(struct output_file* out) {
+  return out->ops->pad(out, out->len);
+}
+
+static struct sparse_file_ops normal_file_ops = {
+    .write_data_chunk = write_normal_data_chunk,
+    .write_fill_chunk = write_normal_fill_chunk,
+    .write_skip_chunk = write_normal_skip_chunk,
+    .write_end_chunk = write_normal_end_chunk,
+};
+
+void output_file_close(struct output_file* out) {
+  out->sparse_ops->write_end_chunk(out);
+  out->ops->close(out);
+}
+
+static int output_file_init(struct output_file* out, int block_size, int64_t len, bool sparse,
+                            int chunks, bool crc) {
+  int ret;
+
+  out->len = len;
+  out->block_size = block_size;
+  out->cur_out_ptr = 0ll;
+  out->chunk_cnt = 0;
+  out->crc32 = 0;
+  out->use_crc = crc;
+
+  out->zero_buf = reinterpret_cast<char*>(calloc(block_size, 1));
+  if (!out->zero_buf) {
+    error_errno("malloc zero_buf");
+    return -ENOMEM;
+  }
+
+  out->fill_buf = reinterpret_cast<uint32_t*>(calloc(block_size, 1));
+  if (!out->fill_buf) {
+    error_errno("malloc fill_buf");
+    ret = -ENOMEM;
+    goto err_fill_buf;
+  }
+
+  if (sparse) {
+    out->sparse_ops = &sparse_file_ops;
+  } else {
+    out->sparse_ops = &normal_file_ops;
+  }
+
+  if (sparse) {
+    sparse_header_t sparse_header = {
+        .magic = SPARSE_HEADER_MAGIC,
+        .major_version = SPARSE_HEADER_MAJOR_VER,
+        .minor_version = SPARSE_HEADER_MINOR_VER,
+        .file_hdr_sz = SPARSE_HEADER_LEN,
+        .chunk_hdr_sz = CHUNK_HEADER_LEN,
+        .blk_sz = out->block_size,
+        .total_blks = static_cast<unsigned>(DIV_ROUND_UP(out->len, out->block_size)),
+        .total_chunks = static_cast<unsigned>(chunks),
+        .image_checksum = 0};
+
+    if (out->use_crc) {
+      sparse_header.total_chunks++;
+    }
+
+    ret = out->ops->write(out, &sparse_header, sizeof(sparse_header));
+    if (ret < 0) {
+      goto err_write;
+    }
+  }
+
+  return 0;
+
+err_write:
+  free(out->fill_buf);
+err_fill_buf:
+  free(out->zero_buf);
+  return ret;
+}
+
+static struct output_file* output_file_new_gz(void) {
+  struct output_file_gz* outgz =
+      reinterpret_cast<struct output_file_gz*>(calloc(1, sizeof(struct output_file_gz)));
+  if (!outgz) {
+    error_errno("malloc struct outgz");
+    return NULL;
+  }
+
+  outgz->out.ops = &gz_file_ops;
+
+  return &outgz->out;
+}
+
+static struct output_file* output_file_new_normal(void) {
+  struct output_file_normal* outn =
+      reinterpret_cast<struct output_file_normal*>(calloc(1, sizeof(struct output_file_normal)));
+  if (!outn) {
+    error_errno("malloc struct outn");
+    return NULL;
+  }
+
+  outn->out.ops = &file_ops;
+
+  return &outn->out;
+}
+
+struct output_file* output_file_open_callback(int (*write)(void*, const void*, size_t), void* priv,
+                                              unsigned int block_size, int64_t len, int gz __unused,
+                                              int sparse, int chunks, int crc) {
+  int ret;
+  struct output_file_callback* outc;
+
+  outc =
+      reinterpret_cast<struct output_file_callback*>(calloc(1, sizeof(struct output_file_callback)));
+  if (!outc) {
+    error_errno("malloc struct outc");
+    return NULL;
+  }
+
+  outc->out.ops = &callback_file_ops;
+  outc->priv = priv;
+  outc->write = write;
+
+  ret = output_file_init(&outc->out, block_size, len, sparse, chunks, crc);
+  if (ret < 0) {
+    free(outc);
+    return NULL;
+  }
+
+  return &outc->out;
+}
+
+struct output_file* output_file_open_fd(int fd, unsigned int block_size, int64_t len, int gz,
+                                        int sparse, int chunks, int crc) {
+  int ret;
+  struct output_file* out;
+
+  if (gz) {
+    out = output_file_new_gz();
+  } else {
+    out = output_file_new_normal();
+  }
+  if (!out) {
+    return NULL;
+  }
+
+  out->ops->open(out, fd);
+
+  ret = output_file_init(out, block_size, len, sparse, chunks, crc);
+  if (ret < 0) {
+    free(out);
+    return NULL;
+  }
+
+  return out;
+}
+
+/* Write a contiguous region of data blocks from a memory buffer */
+int write_data_chunk(struct output_file* out, unsigned int len, void* data) {
+  return out->sparse_ops->write_data_chunk(out, len, data);
+}
+
+/* Write a contiguous region of data blocks with a fill value */
+int write_fill_chunk(struct output_file* out, unsigned int len, uint32_t fill_val) {
+  return out->sparse_ops->write_fill_chunk(out, len, fill_val);
+}
+
+int write_fd_chunk(struct output_file* out, unsigned int len, int fd, int64_t offset) {
+  int ret;
+  int64_t aligned_offset;
+  int aligned_diff;
+  uint64_t buffer_size;
+  char* ptr;
+
+  aligned_offset = offset & ~(4096 - 1);
+  aligned_diff = offset - aligned_offset;
+  buffer_size = (uint64_t)len + (uint64_t)aligned_diff;
+
+#ifndef _WIN32
+  if (buffer_size > SIZE_MAX) return -E2BIG;
+  char* data =
+      reinterpret_cast<char*>(mmap64(NULL, buffer_size, PROT_READ, MAP_SHARED, fd, aligned_offset));
+  if (data == MAP_FAILED) {
+    return -errno;
+  }
+  ptr = data + aligned_diff;
+#else
+  off64_t pos;
+  char* data = reinterpret_cast<char*>(malloc(len));
+  if (!data) {
+    return -errno;
+  }
+  pos = lseek64(fd, offset, SEEK_SET);
+  if (pos < 0) {
+    free(data);
+    return -errno;
+  }
+  ret = read_all(fd, data, len);
+  if (ret < 0) {
+    free(data);
+    return ret;
+  }
+  ptr = data;
+#endif
+
+  ret = out->sparse_ops->write_data_chunk(out, len, ptr);
+
+#ifndef _WIN32
+  munmap(data, buffer_size);
+#else
+  free(data);
+#endif
+
+  return ret;
+}
+
+/* Write a contiguous region of data blocks from a file */
+int write_file_chunk(struct output_file* out, unsigned int len, const char* file, int64_t offset) {
+  int ret;
+
+  int file_fd = open(file, O_RDONLY | O_BINARY);
+  if (file_fd < 0) {
+    return -errno;
+  }
+
+  ret = write_fd_chunk(out, len, file_fd, offset);
+
+  close(file_fd);
+
+  return ret;
+}
+
+int write_skip_chunk(struct output_file* out, int64_t len) {
+  return out->sparse_ops->write_skip_chunk(out, len);
+}
diff --git a/libsparse/output_file.h b/libsparse/output_file.h
index b67e94e..278430b 100644
--- a/libsparse/output_file.h
+++ b/libsparse/output_file.h
@@ -25,22 +25,19 @@
 
 struct output_file;
 
-struct output_file *output_file_open_fd(int fd, unsigned int block_size, int64_t len,
-		int gz, int sparse, int chunks, int crc);
-struct output_file *output_file_open_callback(int (*write)(void *, const void *, int),
-		void *priv, unsigned int block_size, int64_t len, int gz, int sparse,
-		int chunks, int crc);
-int write_data_chunk(struct output_file *out, unsigned int len, void *data);
-int write_fill_chunk(struct output_file *out, unsigned int len,
-		uint32_t fill_val);
-int write_file_chunk(struct output_file *out, unsigned int len,
-		const char *file, int64_t offset);
-int write_fd_chunk(struct output_file *out, unsigned int len,
-		int fd, int64_t offset);
-int write_skip_chunk(struct output_file *out, int64_t len);
-void output_file_close(struct output_file *out);
+struct output_file* output_file_open_fd(int fd, unsigned int block_size, int64_t len, int gz,
+                                        int sparse, int chunks, int crc);
+struct output_file* output_file_open_callback(int (*write)(void*, const void*, size_t), void* priv,
+                                              unsigned int block_size, int64_t len, int gz,
+                                              int sparse, int chunks, int crc);
+int write_data_chunk(struct output_file* out, unsigned int len, void* data);
+int write_fill_chunk(struct output_file* out, unsigned int len, uint32_t fill_val);
+int write_file_chunk(struct output_file* out, unsigned int len, const char* file, int64_t offset);
+int write_fd_chunk(struct output_file* out, unsigned int len, int fd, int64_t offset);
+int write_skip_chunk(struct output_file* out, int64_t len);
+void output_file_close(struct output_file* out);
 
-int read_all(int fd, void *buf, size_t len);
+int read_all(int fd, void* buf, size_t len);
 
 #ifdef __cplusplus
 }
diff --git a/libsparse/simg2img.c b/libsparse/simg2img.c
deleted file mode 100644
index b9b438e..0000000
--- a/libsparse/simg2img.c
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * Copyright (C) 2010 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 <sparse/sparse.h>
-
-#include <fcntl.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
-
-void usage()
-{
-  fprintf(stderr, "Usage: simg2img <sparse_image_files> <raw_image_file>\n");
-}
-
-int main(int argc, char *argv[])
-{
-	int in;
-	int out;
-	int i;
-	struct sparse_file *s;
-
-	if (argc < 3) {
-		usage();
-		exit(-1);
-	}
-
-	out = open(argv[argc - 1], O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
-	if (out < 0) {
-		fprintf(stderr, "Cannot open output file %s\n", argv[argc - 1]);
-		exit(-1);
-	}
-
-	for (i = 1; i < argc - 1; i++) {
-		if (strcmp(argv[i], "-") == 0) {
-			in = STDIN_FILENO;
-		} else {
-			in = open(argv[i], O_RDONLY | O_BINARY);
-			if (in < 0) {
-				fprintf(stderr, "Cannot open input file %s\n", argv[i]);
-				exit(-1);
-			}
-		}
-
-		s = sparse_file_import(in, true, false);
-		if (!s) {
-			fprintf(stderr, "Failed to read sparse file\n");
-			exit(-1);
-		}
-
-		if (lseek(out, 0, SEEK_SET) == -1) {
-			perror("lseek failed");
-			exit(EXIT_FAILURE);
-		}
-
-		if (sparse_file_write(s, out, false, false, false) < 0) {
-			fprintf(stderr, "Cannot write output file\n");
-			exit(-1);
-		}
-		sparse_file_destroy(s);
-		close(in);
-	}
-
-	close(out);
-
-	exit(0);
-}
-
diff --git a/libsparse/simg2img.cpp b/libsparse/simg2img.cpp
new file mode 100644
index 0000000..8ba5f69
--- /dev/null
+++ b/libsparse/simg2img.cpp
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2010 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 <sparse/sparse.h>
+
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+void usage() {
+  fprintf(stderr, "Usage: simg2img <sparse_image_files> <raw_image_file>\n");
+}
+
+int main(int argc, char* argv[]) {
+  int in;
+  int out;
+  int i;
+  struct sparse_file* s;
+
+  if (argc < 3) {
+    usage();
+    exit(-1);
+  }
+
+  out = open(argv[argc - 1], O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
+  if (out < 0) {
+    fprintf(stderr, "Cannot open output file %s\n", argv[argc - 1]);
+    exit(-1);
+  }
+
+  for (i = 1; i < argc - 1; i++) {
+    if (strcmp(argv[i], "-") == 0) {
+      in = STDIN_FILENO;
+    } else {
+      in = open(argv[i], O_RDONLY | O_BINARY);
+      if (in < 0) {
+        fprintf(stderr, "Cannot open input file %s\n", argv[i]);
+        exit(-1);
+      }
+    }
+
+    s = sparse_file_import(in, true, false);
+    if (!s) {
+      fprintf(stderr, "Failed to read sparse file\n");
+      exit(-1);
+    }
+
+    if (lseek(out, 0, SEEK_SET) == -1) {
+      perror("lseek failed");
+      exit(EXIT_FAILURE);
+    }
+
+    if (sparse_file_write(s, out, false, false, false) < 0) {
+      fprintf(stderr, "Cannot write output file\n");
+      exit(-1);
+    }
+    sparse_file_destroy(s);
+    close(in);
+  }
+
+  close(out);
+
+  exit(0);
+}
diff --git a/libsparse/simg2simg.c b/libsparse/simg2simg.c
deleted file mode 100644
index 5f9ccf6..0000000
--- a/libsparse/simg2simg.c
+++ /dev/null
@@ -1,115 +0,0 @@
-/*
- * Copyright (C) 2012 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 _FILE_OFFSET_BITS 64
-#define _LARGEFILE64_SOURCE 1
-#define _GNU_SOURCE
-
-#include <fcntl.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <sparse/sparse.h>
-
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
-
-void usage()
-{
-  fprintf(stderr, "Usage: simg2simg <sparse image file> <sparse_image_file> <max_size>\n");
-}
-
-int main(int argc, char *argv[])
-{
-	int in;
-	int out;
-	int i;
-	int ret;
-	struct sparse_file *s;
-	int64_t max_size;
-	struct sparse_file **out_s;
-	int files;
-	char filename[4096];
-
-	if (argc != 4) {
-		usage();
-		exit(-1);
-	}
-
-	max_size = atoll(argv[3]);
-
-	in = open(argv[1], O_RDONLY | O_BINARY);
-	if (in < 0) {
-		fprintf(stderr, "Cannot open input file %s\n", argv[1]);
-		exit(-1);
-	}
-
-	s = sparse_file_import(in, true, false);
-	if (!s) {
-		fprintf(stderr, "Failed to import sparse file\n");
-		exit(-1);
-	}
-
-	files = sparse_file_resparse(s, max_size, NULL, 0);
-	if (files < 0) {
-		fprintf(stderr, "Failed to resparse\n");
-		exit(-1);
-	}
-
-	out_s = calloc(sizeof(struct sparse_file *), files);
-	if (!out_s) {
-		fprintf(stderr, "Failed to allocate sparse file array\n");
-		exit(-1);
-	}
-
-	files = sparse_file_resparse(s, max_size, out_s, files);
-	if (files < 0) {
-		fprintf(stderr, "Failed to resparse\n");
-		exit(-1);
-	}
-
-	for (i = 0; i < files; i++) {
-		ret = snprintf(filename, sizeof(filename), "%s.%d", argv[2], i);
-		if (ret >= (int)sizeof(filename)) {
-			fprintf(stderr, "Filename too long\n");
-			exit(-1);
-		}
-
-		out = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
-		if (out < 0) {
-			fprintf(stderr, "Cannot open output file %s\n", argv[2]);
-			exit(-1);
-		}
-
-		ret = sparse_file_write(out_s[i], out, false, true, false);
-		if (ret) {
-			fprintf(stderr, "Failed to write sparse file\n");
-			exit(-1);
-		}
-		close(out);
-	}
-
-	close(in);
-
-	exit(0);
-}
diff --git a/libsparse/simg2simg.cpp b/libsparse/simg2simg.cpp
new file mode 100644
index 0000000..7e65701
--- /dev/null
+++ b/libsparse/simg2simg.cpp
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2012 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 _FILE_OFFSET_BITS 64
+#define _LARGEFILE64_SOURCE 1
+
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <sparse/sparse.h>
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+void usage() {
+  fprintf(stderr, "Usage: simg2simg <sparse image file> <sparse_image_file> <max_size>\n");
+}
+
+int main(int argc, char* argv[]) {
+  int in;
+  int out;
+  int i;
+  int ret;
+  struct sparse_file* s;
+  int64_t max_size;
+  struct sparse_file** out_s;
+  int files;
+  char filename[4096];
+
+  if (argc != 4) {
+    usage();
+    exit(-1);
+  }
+
+  max_size = atoll(argv[3]);
+
+  in = open(argv[1], O_RDONLY | O_BINARY);
+  if (in < 0) {
+    fprintf(stderr, "Cannot open input file %s\n", argv[1]);
+    exit(-1);
+  }
+
+  s = sparse_file_import(in, true, false);
+  if (!s) {
+    fprintf(stderr, "Failed to import sparse file\n");
+    exit(-1);
+  }
+
+  files = sparse_file_resparse(s, max_size, NULL, 0);
+  if (files < 0) {
+    fprintf(stderr, "Failed to resparse\n");
+    exit(-1);
+  }
+
+  out_s = calloc(sizeof(struct sparse_file*), files);
+  if (!out_s) {
+    fprintf(stderr, "Failed to allocate sparse file array\n");
+    exit(-1);
+  }
+
+  files = sparse_file_resparse(s, max_size, out_s, files);
+  if (files < 0) {
+    fprintf(stderr, "Failed to resparse\n");
+    exit(-1);
+  }
+
+  for (i = 0; i < files; i++) {
+    ret = snprintf(filename, sizeof(filename), "%s.%d", argv[2], i);
+    if (ret >= (int)sizeof(filename)) {
+      fprintf(stderr, "Filename too long\n");
+      exit(-1);
+    }
+
+    out = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
+    if (out < 0) {
+      fprintf(stderr, "Cannot open output file %s\n", argv[2]);
+      exit(-1);
+    }
+
+    ret = sparse_file_write(out_s[i], out, false, true, false);
+    if (ret) {
+      fprintf(stderr, "Failed to write sparse file\n");
+      exit(-1);
+    }
+    close(out);
+  }
+
+  close(in);
+
+  exit(0);
+}
diff --git a/libsparse/sparse.c b/libsparse/sparse.c
deleted file mode 100644
index b175860..0000000
--- a/libsparse/sparse.c
+++ /dev/null
@@ -1,395 +0,0 @@
-/*
- * Copyright (C) 2012 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 <assert.h>
-#include <stdlib.h>
-
-#include <sparse/sparse.h>
-
-#include "defs.h"
-#include "sparse_file.h"
-
-#include "output_file.h"
-#include "backed_block.h"
-#include "sparse_defs.h"
-#include "sparse_format.h"
-
-struct sparse_file *sparse_file_new(unsigned int block_size, int64_t len)
-{
-	struct sparse_file *s = calloc(sizeof(struct sparse_file), 1);
-	if (!s) {
-		return NULL;
-	}
-
-	s->backed_block_list = backed_block_list_new(block_size);
-	if (!s->backed_block_list) {
-		free(s);
-		return NULL;
-	}
-
-	s->block_size = block_size;
-	s->len = len;
-
-	return s;
-}
-
-void sparse_file_destroy(struct sparse_file *s)
-{
-	backed_block_list_destroy(s->backed_block_list);
-	free(s);
-}
-
-int sparse_file_add_data(struct sparse_file *s,
-		void *data, unsigned int len, unsigned int block)
-{
-	return backed_block_add_data(s->backed_block_list, data, len, block);
-}
-
-int sparse_file_add_fill(struct sparse_file *s,
-		uint32_t fill_val, unsigned int len, unsigned int block)
-{
-	return backed_block_add_fill(s->backed_block_list, fill_val, len, block);
-}
-
-int sparse_file_add_file(struct sparse_file *s,
-		const char *filename, int64_t file_offset, unsigned int len,
-		unsigned int block)
-{
-	return backed_block_add_file(s->backed_block_list, filename, file_offset,
-			len, block);
-}
-
-int sparse_file_add_fd(struct sparse_file *s,
-		int fd, int64_t file_offset, unsigned int len, unsigned int block)
-{
-	return backed_block_add_fd(s->backed_block_list, fd, file_offset,
-			len, block);
-}
-unsigned int sparse_count_chunks(struct sparse_file *s)
-{
-	struct backed_block *bb;
-	unsigned int last_block = 0;
-	unsigned int chunks = 0;
-
-	for (bb = backed_block_iter_new(s->backed_block_list); bb;
-			bb = backed_block_iter_next(bb)) {
-		if (backed_block_block(bb) > last_block) {
-			/* If there is a gap between chunks, add a skip chunk */
-			chunks++;
-		}
-		chunks++;
-		last_block = backed_block_block(bb) +
-				DIV_ROUND_UP(backed_block_len(bb), s->block_size);
-	}
-	if (last_block < DIV_ROUND_UP(s->len, s->block_size)) {
-		chunks++;
-	}
-
-	return chunks;
-}
-
-static int sparse_file_write_block(struct output_file *out,
-		struct backed_block *bb)
-{
-	int ret = -EINVAL;
-
-	switch (backed_block_type(bb)) {
-	case BACKED_BLOCK_DATA:
-		ret = write_data_chunk(out, backed_block_len(bb), backed_block_data(bb));
-		break;
-	case BACKED_BLOCK_FILE:
-		ret = write_file_chunk(out, backed_block_len(bb),
-				       backed_block_filename(bb),
-				       backed_block_file_offset(bb));
-		break;
-	case BACKED_BLOCK_FD:
-		ret = write_fd_chunk(out, backed_block_len(bb),
-				     backed_block_fd(bb),
-				     backed_block_file_offset(bb));
-		break;
-	case BACKED_BLOCK_FILL:
-		ret = write_fill_chunk(out, backed_block_len(bb),
-				       backed_block_fill_val(bb));
-		break;
-	}
-
-	return ret;
-}
-
-static int write_all_blocks(struct sparse_file *s, struct output_file *out)
-{
-	struct backed_block *bb;
-	unsigned int last_block = 0;
-	int64_t pad;
-	int ret = 0;
-
-	for (bb = backed_block_iter_new(s->backed_block_list); bb;
-			bb = backed_block_iter_next(bb)) {
-		if (backed_block_block(bb) > last_block) {
-			unsigned int blocks = backed_block_block(bb) - last_block;
-			write_skip_chunk(out, (int64_t)blocks * s->block_size);
-		}
-		ret = sparse_file_write_block(out, bb);
-		if (ret)
-			return ret;
-		last_block = backed_block_block(bb) +
-				DIV_ROUND_UP(backed_block_len(bb), s->block_size);
-	}
-
-	pad = s->len - (int64_t)last_block * s->block_size;
-	assert(pad >= 0);
-	if (pad > 0) {
-		write_skip_chunk(out, pad);
-	}
-
-	return 0;
-}
-
-int sparse_file_write(struct sparse_file *s, int fd, bool gz, bool sparse,
-		bool crc)
-{
-	int ret;
-	int chunks;
-	struct output_file *out;
-
-	chunks = sparse_count_chunks(s);
-	out = output_file_open_fd(fd, s->block_size, s->len, gz, sparse, chunks, crc);
-
-	if (!out)
-		return -ENOMEM;
-
-	ret = write_all_blocks(s, out);
-
-	output_file_close(out);
-
-	return ret;
-}
-
-int sparse_file_callback(struct sparse_file *s, bool sparse, bool crc,
-		int (*write)(void *priv, const void *data, int len), void *priv)
-{
-	int ret;
-	int chunks;
-	struct output_file *out;
-
-	chunks = sparse_count_chunks(s);
-	out = output_file_open_callback(write, priv, s->block_size, s->len, false,
-			sparse, chunks, crc);
-
-	if (!out)
-		return -ENOMEM;
-
-	ret = write_all_blocks(s, out);
-
-	output_file_close(out);
-
-	return ret;
-}
-
-struct chunk_data {
-	void		*priv;
-	unsigned int	block;
-	unsigned int	nr_blocks;
-	int (*write)(void *priv, const void *data, int len, unsigned int block,
-		     unsigned int nr_blocks);
-};
-
-static int foreach_chunk_write(void *priv, const void *data, int len)
-{
-	struct chunk_data *chk = priv;
-
-	return chk->write(chk->priv, data, len, chk->block, chk->nr_blocks);
-}
-
-int sparse_file_foreach_chunk(struct sparse_file *s, bool sparse, bool crc,
-	int (*write)(void *priv, const void *data, int len, unsigned int block,
-		     unsigned int nr_blocks),
-	void *priv)
-{
-	int ret;
-	int chunks;
-	struct chunk_data chk;
-	struct output_file *out;
-	struct backed_block *bb;
-
-	chk.priv = priv;
-	chk.write = write;
-	chk.block = chk.nr_blocks = 0;
-	chunks = sparse_count_chunks(s);
-	out = output_file_open_callback(foreach_chunk_write, &chk,
-					s->block_size, s->len, false, sparse,
-					chunks, crc);
-
-	if (!out)
-		return -ENOMEM;
-
-	for (bb = backed_block_iter_new(s->backed_block_list); bb;
-			bb = backed_block_iter_next(bb)) {
-		chk.block = backed_block_block(bb);
-		chk.nr_blocks = (backed_block_len(bb) - 1) / s->block_size + 1;
-		ret = sparse_file_write_block(out, bb);
-		if (ret)
-			return ret;
-	}
-
-	output_file_close(out);
-
-	return ret;
-}
-
-static int out_counter_write(void *priv, const void *data __unused, int len)
-{
-	int64_t *count = priv;
-	*count += len;
-	return 0;
-}
-
-int64_t sparse_file_len(struct sparse_file *s, bool sparse, bool crc)
-{
-	int ret;
-	int chunks = sparse_count_chunks(s);
-	int64_t count = 0;
-	struct output_file *out;
-
-	out = output_file_open_callback(out_counter_write, &count,
-			s->block_size, s->len, false, sparse, chunks, crc);
-	if (!out) {
-		return -1;
-	}
-
-	ret = write_all_blocks(s, out);
-
-	output_file_close(out);
-
-	if (ret < 0) {
-		return -1;
-	}
-
-	return count;
-}
-
-unsigned int sparse_file_block_size(struct sparse_file *s)
-{
-	return s->block_size;
-}
-
-static struct backed_block *move_chunks_up_to_len(struct sparse_file *from,
-		struct sparse_file *to, unsigned int len)
-{
-	int64_t count = 0;
-	struct output_file *out_counter;
-	struct backed_block *last_bb = NULL;
-	struct backed_block *bb;
-	struct backed_block *start;
-	unsigned int last_block = 0;
-	int64_t file_len = 0;
-	int ret;
-
-	/*
-	 * overhead is sparse file header, the potential end skip
-	 * chunk and crc chunk.
-	 */
-	int overhead = sizeof(sparse_header_t) + 2 * sizeof(chunk_header_t) +
-			sizeof(uint32_t);
-	len -= overhead;
-
-	start = backed_block_iter_new(from->backed_block_list);
-	out_counter = output_file_open_callback(out_counter_write, &count,
-			to->block_size, to->len, false, true, 0, false);
-	if (!out_counter) {
-		return NULL;
-	}
-
-	for (bb = start; bb; bb = backed_block_iter_next(bb)) {
-		count = 0;
-		if (backed_block_block(bb) > last_block)
-			count += sizeof(chunk_header_t);
-		last_block = backed_block_block(bb) +
-				DIV_ROUND_UP(backed_block_len(bb), to->block_size);
-
-		/* will call out_counter_write to update count */
-		ret = sparse_file_write_block(out_counter, bb);
-		if (ret) {
-			bb = NULL;
-			goto out;
-		}
-		if (file_len + count > len) {
-			/*
-			 * If the remaining available size is more than 1/8th of the
-			 * requested size, split the chunk.  Results in sparse files that
-			 * are at least 7/8ths of the requested size
-			 */
-			file_len += sizeof(chunk_header_t);
-			if (!last_bb || (len - file_len > (len / 8))) {
-				backed_block_split(from->backed_block_list, bb, len - file_len);
-				last_bb = bb;
-			}
-			goto move;
-		}
-		file_len += count;
-		last_bb = bb;
-	}
-
-move:
-	backed_block_list_move(from->backed_block_list,
-		to->backed_block_list, start, last_bb);
-
-out:
-	output_file_close(out_counter);
-
-	return bb;
-}
-
-int sparse_file_resparse(struct sparse_file *in_s, unsigned int max_len,
-		struct sparse_file **out_s, int out_s_count)
-{
-	struct backed_block *bb;
-	struct sparse_file *s;
-	struct sparse_file *tmp;
-	int c = 0;
-
-	tmp = sparse_file_new(in_s->block_size, in_s->len);
-	if (!tmp) {
-		return -ENOMEM;
-	}
-
-	do {
-		s = sparse_file_new(in_s->block_size, in_s->len);
-
-		bb = move_chunks_up_to_len(in_s, s, max_len);
-
-		if (c < out_s_count) {
-			out_s[c] = s;
-		} else {
-			backed_block_list_move(s->backed_block_list, tmp->backed_block_list,
-					NULL, NULL);
-			sparse_file_destroy(s);
-		}
-		c++;
-	} while (bb);
-
-	backed_block_list_move(tmp->backed_block_list, in_s->backed_block_list,
-			NULL, NULL);
-
-	sparse_file_destroy(tmp);
-
-	return c;
-}
-
-void sparse_file_verbose(struct sparse_file *s)
-{
-	s->verbose = true;
-}
diff --git a/libsparse/sparse.cpp b/libsparse/sparse.cpp
new file mode 100644
index 0000000..6ff97b6
--- /dev/null
+++ b/libsparse/sparse.cpp
@@ -0,0 +1,348 @@
+/*
+ * Copyright (C) 2012 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 <assert.h>
+#include <stdlib.h>
+
+#include <sparse/sparse.h>
+
+#include "defs.h"
+#include "sparse_file.h"
+
+#include "backed_block.h"
+#include "output_file.h"
+#include "sparse_defs.h"
+#include "sparse_format.h"
+
+struct sparse_file* sparse_file_new(unsigned int block_size, int64_t len) {
+  struct sparse_file* s = reinterpret_cast<sparse_file*>(calloc(sizeof(struct sparse_file), 1));
+  if (!s) {
+    return NULL;
+  }
+
+  s->backed_block_list = backed_block_list_new(block_size);
+  if (!s->backed_block_list) {
+    free(s);
+    return NULL;
+  }
+
+  s->block_size = block_size;
+  s->len = len;
+
+  return s;
+}
+
+void sparse_file_destroy(struct sparse_file* s) {
+  backed_block_list_destroy(s->backed_block_list);
+  free(s);
+}
+
+int sparse_file_add_data(struct sparse_file* s, void* data, unsigned int len, unsigned int block) {
+  return backed_block_add_data(s->backed_block_list, data, len, block);
+}
+
+int sparse_file_add_fill(struct sparse_file* s, uint32_t fill_val, unsigned int len,
+                         unsigned int block) {
+  return backed_block_add_fill(s->backed_block_list, fill_val, len, block);
+}
+
+int sparse_file_add_file(struct sparse_file* s, const char* filename, int64_t file_offset,
+                         unsigned int len, unsigned int block) {
+  return backed_block_add_file(s->backed_block_list, filename, file_offset, len, block);
+}
+
+int sparse_file_add_fd(struct sparse_file* s, int fd, int64_t file_offset, unsigned int len,
+                       unsigned int block) {
+  return backed_block_add_fd(s->backed_block_list, fd, file_offset, len, block);
+}
+unsigned int sparse_count_chunks(struct sparse_file* s) {
+  struct backed_block* bb;
+  unsigned int last_block = 0;
+  unsigned int chunks = 0;
+
+  for (bb = backed_block_iter_new(s->backed_block_list); bb; bb = backed_block_iter_next(bb)) {
+    if (backed_block_block(bb) > last_block) {
+      /* If there is a gap between chunks, add a skip chunk */
+      chunks++;
+    }
+    chunks++;
+    last_block = backed_block_block(bb) + DIV_ROUND_UP(backed_block_len(bb), s->block_size);
+  }
+  if (last_block < DIV_ROUND_UP(s->len, s->block_size)) {
+    chunks++;
+  }
+
+  return chunks;
+}
+
+static int sparse_file_write_block(struct output_file* out, struct backed_block* bb) {
+  int ret = -EINVAL;
+
+  switch (backed_block_type(bb)) {
+    case BACKED_BLOCK_DATA:
+      ret = write_data_chunk(out, backed_block_len(bb), backed_block_data(bb));
+      break;
+    case BACKED_BLOCK_FILE:
+      ret = write_file_chunk(out, backed_block_len(bb), backed_block_filename(bb),
+                             backed_block_file_offset(bb));
+      break;
+    case BACKED_BLOCK_FD:
+      ret = write_fd_chunk(out, backed_block_len(bb), backed_block_fd(bb),
+                           backed_block_file_offset(bb));
+      break;
+    case BACKED_BLOCK_FILL:
+      ret = write_fill_chunk(out, backed_block_len(bb), backed_block_fill_val(bb));
+      break;
+  }
+
+  return ret;
+}
+
+static int write_all_blocks(struct sparse_file* s, struct output_file* out) {
+  struct backed_block* bb;
+  unsigned int last_block = 0;
+  int64_t pad;
+  int ret = 0;
+
+  for (bb = backed_block_iter_new(s->backed_block_list); bb; bb = backed_block_iter_next(bb)) {
+    if (backed_block_block(bb) > last_block) {
+      unsigned int blocks = backed_block_block(bb) - last_block;
+      write_skip_chunk(out, (int64_t)blocks * s->block_size);
+    }
+    ret = sparse_file_write_block(out, bb);
+    if (ret) return ret;
+    last_block = backed_block_block(bb) + DIV_ROUND_UP(backed_block_len(bb), s->block_size);
+  }
+
+  pad = s->len - (int64_t)last_block * s->block_size;
+  assert(pad >= 0);
+  if (pad > 0) {
+    write_skip_chunk(out, pad);
+  }
+
+  return 0;
+}
+
+int sparse_file_write(struct sparse_file* s, int fd, bool gz, bool sparse, bool crc) {
+  int ret;
+  int chunks;
+  struct output_file* out;
+
+  chunks = sparse_count_chunks(s);
+  out = output_file_open_fd(fd, s->block_size, s->len, gz, sparse, chunks, crc);
+
+  if (!out) return -ENOMEM;
+
+  ret = write_all_blocks(s, out);
+
+  output_file_close(out);
+
+  return ret;
+}
+
+int sparse_file_callback(struct sparse_file* s, bool sparse, bool crc,
+                         int (*write)(void* priv, const void* data, size_t len), void* priv) {
+  int ret;
+  int chunks;
+  struct output_file* out;
+
+  chunks = sparse_count_chunks(s);
+  out = output_file_open_callback(write, priv, s->block_size, s->len, false, sparse, chunks, crc);
+
+  if (!out) return -ENOMEM;
+
+  ret = write_all_blocks(s, out);
+
+  output_file_close(out);
+
+  return ret;
+}
+
+struct chunk_data {
+  void* priv;
+  unsigned int block;
+  unsigned int nr_blocks;
+  int (*write)(void* priv, const void* data, size_t len, unsigned int block, unsigned int nr_blocks);
+};
+
+static int foreach_chunk_write(void* priv, const void* data, size_t len) {
+  struct chunk_data* chk = reinterpret_cast<chunk_data*>(priv);
+
+  return chk->write(chk->priv, data, len, chk->block, chk->nr_blocks);
+}
+
+int sparse_file_foreach_chunk(struct sparse_file* s, bool sparse, bool crc,
+                              int (*write)(void* priv, const void* data, size_t len,
+                                           unsigned int block, unsigned int nr_blocks),
+                              void* priv) {
+  int ret;
+  int chunks;
+  struct chunk_data chk;
+  struct output_file* out;
+  struct backed_block* bb;
+
+  chk.priv = priv;
+  chk.write = write;
+  chk.block = chk.nr_blocks = 0;
+  chunks = sparse_count_chunks(s);
+  out = output_file_open_callback(foreach_chunk_write, &chk, s->block_size, s->len, false, sparse,
+                                  chunks, crc);
+
+  if (!out) return -ENOMEM;
+
+  for (bb = backed_block_iter_new(s->backed_block_list); bb; bb = backed_block_iter_next(bb)) {
+    chk.block = backed_block_block(bb);
+    chk.nr_blocks = (backed_block_len(bb) - 1) / s->block_size + 1;
+    ret = sparse_file_write_block(out, bb);
+    if (ret) return ret;
+  }
+
+  output_file_close(out);
+
+  return ret;
+}
+
+static int out_counter_write(void* priv, const void* data __unused, size_t len) {
+  int64_t* count = reinterpret_cast<int64_t*>(priv);
+  *count += len;
+  return 0;
+}
+
+int64_t sparse_file_len(struct sparse_file* s, bool sparse, bool crc) {
+  int ret;
+  int chunks = sparse_count_chunks(s);
+  int64_t count = 0;
+  struct output_file* out;
+
+  out = output_file_open_callback(out_counter_write, &count, s->block_size, s->len, false, sparse,
+                                  chunks, crc);
+  if (!out) {
+    return -1;
+  }
+
+  ret = write_all_blocks(s, out);
+
+  output_file_close(out);
+
+  if (ret < 0) {
+    return -1;
+  }
+
+  return count;
+}
+
+unsigned int sparse_file_block_size(struct sparse_file* s) {
+  return s->block_size;
+}
+
+static struct backed_block* move_chunks_up_to_len(struct sparse_file* from, struct sparse_file* to,
+                                                  unsigned int len) {
+  int64_t count = 0;
+  struct output_file* out_counter;
+  struct backed_block* last_bb = NULL;
+  struct backed_block* bb;
+  struct backed_block* start;
+  unsigned int last_block = 0;
+  int64_t file_len = 0;
+  int ret;
+
+  /*
+   * overhead is sparse file header, the potential end skip
+   * chunk and crc chunk.
+   */
+  int overhead = sizeof(sparse_header_t) + 2 * sizeof(chunk_header_t) + sizeof(uint32_t);
+  len -= overhead;
+
+  start = backed_block_iter_new(from->backed_block_list);
+  out_counter = output_file_open_callback(out_counter_write, &count, to->block_size, to->len, false,
+                                          true, 0, false);
+  if (!out_counter) {
+    return NULL;
+  }
+
+  for (bb = start; bb; bb = backed_block_iter_next(bb)) {
+    count = 0;
+    if (backed_block_block(bb) > last_block) count += sizeof(chunk_header_t);
+    last_block = backed_block_block(bb) + DIV_ROUND_UP(backed_block_len(bb), to->block_size);
+
+    /* will call out_counter_write to update count */
+    ret = sparse_file_write_block(out_counter, bb);
+    if (ret) {
+      bb = NULL;
+      goto out;
+    }
+    if (file_len + count > len) {
+      /*
+       * If the remaining available size is more than 1/8th of the
+       * requested size, split the chunk.  Results in sparse files that
+       * are at least 7/8ths of the requested size
+       */
+      file_len += sizeof(chunk_header_t);
+      if (!last_bb || (len - file_len > (len / 8))) {
+        backed_block_split(from->backed_block_list, bb, len - file_len);
+        last_bb = bb;
+      }
+      goto move;
+    }
+    file_len += count;
+    last_bb = bb;
+  }
+
+move:
+  backed_block_list_move(from->backed_block_list, to->backed_block_list, start, last_bb);
+
+out:
+  output_file_close(out_counter);
+
+  return bb;
+}
+
+int sparse_file_resparse(struct sparse_file* in_s, unsigned int max_len, struct sparse_file** out_s,
+                         int out_s_count) {
+  struct backed_block* bb;
+  struct sparse_file* s;
+  struct sparse_file* tmp;
+  int c = 0;
+
+  tmp = sparse_file_new(in_s->block_size, in_s->len);
+  if (!tmp) {
+    return -ENOMEM;
+  }
+
+  do {
+    s = sparse_file_new(in_s->block_size, in_s->len);
+
+    bb = move_chunks_up_to_len(in_s, s, max_len);
+
+    if (c < out_s_count) {
+      out_s[c] = s;
+    } else {
+      backed_block_list_move(s->backed_block_list, tmp->backed_block_list, NULL, NULL);
+      sparse_file_destroy(s);
+    }
+    c++;
+  } while (bb);
+
+  backed_block_list_move(tmp->backed_block_list, in_s->backed_block_list, NULL, NULL);
+
+  sparse_file_destroy(tmp);
+
+  return c;
+}
+
+void sparse_file_verbose(struct sparse_file* s) {
+  s->verbose = true;
+}
diff --git a/libsparse/sparse_crc32.c b/libsparse/sparse_crc32.c
deleted file mode 100644
index 38bfe4a..0000000
--- a/libsparse/sparse_crc32.c
+++ /dev/null
@@ -1,111 +0,0 @@
-/*-
- *  COPYRIGHT (C) 1986 Gary S. Brown.  You may use this program, or
- *  code or tables extracted from it, as desired without restriction.
- */
-
-/*
- *  First, the polynomial itself and its table of feedback terms.  The
- *  polynomial is
- *  X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0
- *
- *  Note that we take it "backwards" and put the highest-order term in
- *  the lowest-order bit.  The X^32 term is "implied"; the LSB is the
- *  X^31 term, etc.  The X^0 term (usually shown as "+1") results in
- *  the MSB being 1
- *
- *  Note that the usual hardware shift register implementation, which
- *  is what we're using (we're merely optimizing it by doing eight-bit
- *  chunks at a time) shifts bits into the lowest-order term.  In our
- *  implementation, that means shifting towards the right.  Why do we
- *  do it this way?  Because the calculated CRC must be transmitted in
- *  order from highest-order term to lowest-order term.  UARTs transmit
- *  characters in order from LSB to MSB.  By storing the CRC this way
- *  we hand it to the UART in the order low-byte to high-byte; the UART
- *  sends each low-bit to hight-bit; and the result is transmission bit
- *  by bit from highest- to lowest-order term without requiring any bit
- *  shuffling on our part.  Reception works similarly
- *
- *  The feedback terms table consists of 256, 32-bit entries.  Notes
- *
- *      The table can be generated at runtime if desired; code to do so
- *      is shown later.  It might not be obvious, but the feedback
- *      terms simply represent the results of eight shift/xor opera
- *      tions for all combinations of data and CRC register values
- *
- *      The values must be right-shifted by eight bits by the "updcrc
- *      logic; the shift must be unsigned (bring in zeroes).  On some
- *      hardware you could probably optimize the shift in assembler by
- *      using byte-swap instructions
- *      polynomial $edb88320
- *
- *
- * CRC32 code derived from work by Gary S. Brown.
- */
-
-/* Code taken from FreeBSD 8 */
-#include <stdint.h>
-
-static uint32_t crc32_tab[] = {
-        0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
-        0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
-        0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
-        0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
-        0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
-        0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
-        0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
-        0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
-        0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
-        0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
-        0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
-        0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
-        0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
-        0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
-        0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
-        0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
-        0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
-        0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
-        0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
-        0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
-        0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
-        0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
-        0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
-        0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
-        0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
-        0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
-        0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
-        0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
-        0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
-        0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
-        0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
-        0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
-        0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
-        0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
-        0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
-        0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
-        0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
-        0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
-        0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
-        0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
-        0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
-        0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
-        0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
-};
-
-/*
- * A function that calculates the CRC-32 based on the table above is
- * given below for documentation purposes. An equivalent implementation
- * of this function that's actually used in the kernel can be found
- * in sys/libkern.h, where it can be inlined.
- */
-
-uint32_t sparse_crc32(uint32_t crc_in, const void *buf, int size)
-{
-        const uint8_t *p = buf;
-        uint32_t crc;
-
-        crc = crc_in ^ ~0U;
-        while (size--)
-                crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
-        return crc ^ ~0U;
-}
-
diff --git a/libsparse/sparse_crc32.cpp b/libsparse/sparse_crc32.cpp
new file mode 100644
index 0000000..267322c
--- /dev/null
+++ b/libsparse/sparse_crc32.cpp
@@ -0,0 +1,97 @@
+/*-
+ *  COPYRIGHT (C) 1986 Gary S. Brown.  You may use this program, or
+ *  code or tables extracted from it, as desired without restriction.
+ */
+
+/*
+ *  First, the polynomial itself and its table of feedback terms.  The
+ *  polynomial is
+ *  X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0
+ *
+ *  Note that we take it "backwards" and put the highest-order term in
+ *  the lowest-order bit.  The X^32 term is "implied"; the LSB is the
+ *  X^31 term, etc.  The X^0 term (usually shown as "+1") results in
+ *  the MSB being 1
+ *
+ *  Note that the usual hardware shift register implementation, which
+ *  is what we're using (we're merely optimizing it by doing eight-bit
+ *  chunks at a time) shifts bits into the lowest-order term.  In our
+ *  implementation, that means shifting towards the right.  Why do we
+ *  do it this way?  Because the calculated CRC must be transmitted in
+ *  order from highest-order term to lowest-order term.  UARTs transmit
+ *  characters in order from LSB to MSB.  By storing the CRC this way
+ *  we hand it to the UART in the order low-byte to high-byte; the UART
+ *  sends each low-bit to hight-bit; and the result is transmission bit
+ *  by bit from highest- to lowest-order term without requiring any bit
+ *  shuffling on our part.  Reception works similarly
+ *
+ *  The feedback terms table consists of 256, 32-bit entries.  Notes
+ *
+ *      The table can be generated at runtime if desired; code to do so
+ *      is shown later.  It might not be obvious, but the feedback
+ *      terms simply represent the results of eight shift/xor opera
+ *      tions for all combinations of data and CRC register values
+ *
+ *      The values must be right-shifted by eight bits by the "updcrc
+ *      logic; the shift must be unsigned (bring in zeroes).  On some
+ *      hardware you could probably optimize the shift in assembler by
+ *      using byte-swap instructions
+ *      polynomial $edb88320
+ *
+ *
+ * CRC32 code derived from work by Gary S. Brown.
+ */
+
+/* Code taken from FreeBSD 8 */
+#include <stdint.h>
+#include <stdio.h>
+
+static uint32_t crc32_tab[] = {
+    0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
+    0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
+    0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+    0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
+    0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
+    0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+    0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
+    0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
+    0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+    0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
+    0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
+    0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+    0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
+    0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
+    0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+    0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
+    0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
+    0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+    0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
+    0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
+    0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+    0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
+    0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
+    0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+    0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
+    0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
+    0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+    0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
+    0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
+    0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+    0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
+    0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d};
+
+/*
+ * A function that calculates the CRC-32 based on the table above is
+ * given below for documentation purposes. An equivalent implementation
+ * of this function that's actually used in the kernel can be found
+ * in sys/libkern.h, where it can be inlined.
+ */
+
+uint32_t sparse_crc32(uint32_t crc_in, const void* buf, size_t size) {
+  const uint8_t* p = reinterpret_cast<const uint8_t*>(buf);
+  uint32_t crc;
+
+  crc = crc_in ^ ~0U;
+  while (size--) crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
+  return crc ^ ~0U;
+}
diff --git a/libsparse/sparse_crc32.h b/libsparse/sparse_crc32.h
index 50cd9e9..2702c4f 100644
--- a/libsparse/sparse_crc32.h
+++ b/libsparse/sparse_crc32.h
@@ -19,14 +19,6 @@
 
 #include <stdint.h>
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-uint32_t sparse_crc32(uint32_t crc, const void *buf, size_t size);
-
-#ifdef __cplusplus
-}
-#endif
+uint32_t sparse_crc32(uint32_t crc, const void* buf, size_t size);
 
 #endif
diff --git a/libsparse/sparse_defs.h b/libsparse/sparse_defs.h
index b99cfd5..9137805 100644
--- a/libsparse/sparse_defs.h
+++ b/libsparse/sparse_defs.h
@@ -39,11 +39,14 @@
 typedef unsigned short int u16;
 typedef unsigned char u8;
 
-#define DIV_ROUND_UP(x, y) (((x) + (y) - 1)/(y))
-#define ALIGN(x, y) ((y) * DIV_ROUND_UP((x), (y)))
+#define DIV_ROUND_UP(x, y) (((x) + (y)-1) / (y))
+#define ALIGN(x, y) ((y)*DIV_ROUND_UP((x), (y)))
 #define ALIGN_DOWN(x, y) ((y) * ((x) / (y)))
 
-#define error(fmt, args...) do { fprintf(stderr, "error: %s: " fmt "\n", __func__, ## args); } while (0)
+#define error(fmt, args...)                                    \
+  do {                                                         \
+    fprintf(stderr, "error: %s: " fmt "\n", __func__, ##args); \
+  } while (0)
 #define error_errno(s, args...) error(s ": %s", ##args, strerror(errno))
 
 #endif
diff --git a/libsparse/sparse_err.c b/libsparse/sparse_err.cpp
similarity index 73%
rename from libsparse/sparse_err.c
rename to libsparse/sparse_err.cpp
index 0f392ad..6886d31 100644
--- a/libsparse/sparse_err.c
+++ b/libsparse/sparse_err.cpp
@@ -20,14 +20,13 @@
 #include <stdio.h>
 #include <unistd.h>
 
-void sparse_default_print(const char *fmt, ...)
-{
-	va_list argp;
+void sparse_default_print(const char* fmt, ...) {
+  va_list argp;
 
-	va_start(argp, fmt);
-	vfprintf(stderr, fmt, argp);
-	va_end(argp);
+  va_start(argp, fmt);
+  vfprintf(stderr, fmt, argp);
+  va_end(argp);
 }
 
-void (*sparse_print_error)(const char *fmt, ...) = sparse_default_print;
-void (*sparse_print_verbose)(const char *fmt, ...) = sparse_default_print;
+void (*sparse_print_error)(const char* fmt, ...) = sparse_default_print;
+void (*sparse_print_verbose)(const char* fmt, ...) = sparse_default_print;
diff --git a/libsparse/sparse_file.h b/libsparse/sparse_file.h
index 763f43f..e565f63 100644
--- a/libsparse/sparse_file.h
+++ b/libsparse/sparse_file.h
@@ -24,12 +24,12 @@
 #include <sparse/sparse.h>
 
 struct sparse_file {
-	unsigned int block_size;
-	int64_t len;
-	bool verbose;
+  unsigned int block_size;
+  int64_t len;
+  bool verbose;
 
-	struct backed_block_list *backed_block_list;
-	struct output_file *out;
+  struct backed_block_list* backed_block_list;
+  struct output_file* out;
 };
 
 #ifdef __cplusplus
diff --git a/libsparse/sparse_format.h b/libsparse/sparse_format.h
index 779e038..a8a721e 100644
--- a/libsparse/sparse_format.h
+++ b/libsparse/sparse_format.h
@@ -23,31 +23,31 @@
 #endif
 
 typedef struct sparse_header {
-  __le32	magic;		/* 0xed26ff3a */
-  __le16	major_version;	/* (0x1) - reject images with higher major versions */
-  __le16	minor_version;	/* (0x0) - allow images with higer minor versions */
-  __le16	file_hdr_sz;	/* 28 bytes for first revision of the file format */
-  __le16	chunk_hdr_sz;	/* 12 bytes for first revision of the file format */
-  __le32	blk_sz;		/* block size in bytes, must be a multiple of 4 (4096) */
-  __le32	total_blks;	/* total blocks in the non-sparse output image */
-  __le32	total_chunks;	/* total chunks in the sparse input image */
-  __le32	image_checksum; /* CRC32 checksum of the original data, counting "don't care" */
-				/* as 0. Standard 802.3 polynomial, use a Public Domain */
-				/* table implementation */
+  __le32 magic;          /* 0xed26ff3a */
+  __le16 major_version;  /* (0x1) - reject images with higher major versions */
+  __le16 minor_version;  /* (0x0) - allow images with higer minor versions */
+  __le16 file_hdr_sz;    /* 28 bytes for first revision of the file format */
+  __le16 chunk_hdr_sz;   /* 12 bytes for first revision of the file format */
+  __le32 blk_sz;         /* block size in bytes, must be a multiple of 4 (4096) */
+  __le32 total_blks;     /* total blocks in the non-sparse output image */
+  __le32 total_chunks;   /* total chunks in the sparse input image */
+  __le32 image_checksum; /* CRC32 checksum of the original data, counting "don't care" */
+                         /* as 0. Standard 802.3 polynomial, use a Public Domain */
+                         /* table implementation */
 } sparse_header_t;
 
-#define SPARSE_HEADER_MAGIC	0xed26ff3a
+#define SPARSE_HEADER_MAGIC 0xed26ff3a
 
-#define CHUNK_TYPE_RAW		0xCAC1
-#define CHUNK_TYPE_FILL		0xCAC2
-#define CHUNK_TYPE_DONT_CARE	0xCAC3
-#define CHUNK_TYPE_CRC32    0xCAC4
+#define CHUNK_TYPE_RAW 0xCAC1
+#define CHUNK_TYPE_FILL 0xCAC2
+#define CHUNK_TYPE_DONT_CARE 0xCAC3
+#define CHUNK_TYPE_CRC32 0xCAC4
 
 typedef struct chunk_header {
-  __le16	chunk_type;	/* 0xCAC1 -> raw; 0xCAC2 -> fill; 0xCAC3 -> don't care */
-  __le16	reserved1;
-  __le32	chunk_sz;	/* in blocks in output image */
-  __le32	total_sz;	/* in bytes of chunk input file including chunk header and data */
+  __le16 chunk_type; /* 0xCAC1 -> raw; 0xCAC2 -> fill; 0xCAC3 -> don't care */
+  __le16 reserved1;
+  __le32 chunk_sz; /* in blocks in output image */
+  __le32 total_sz; /* in bytes of chunk input file including chunk header and data */
 } chunk_header_t;
 
 /* Following a Raw or Fill or CRC32 chunk is data.
diff --git a/libsparse/sparse_read.cpp b/libsparse/sparse_read.cpp
index 4379635..56e2c9a 100644
--- a/libsparse/sparse_read.cpp
+++ b/libsparse/sparse_read.cpp
@@ -17,16 +17,16 @@
 #define _FILE_OFFSET_BITS 64
 #define _LARGEFILE64_SOURCE 1
 
-#include <algorithm>
-#include <inttypes.h>
 #include <fcntl.h>
+#include <inttypes.h>
 #include <stdarg.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <string>
 #include <unistd.h>
+#include <algorithm>
+#include <string>
 
 #include <sparse/sparse.h>
 
@@ -37,447 +37,541 @@
 #include "sparse_file.h"
 #include "sparse_format.h"
 
-
 #if defined(__APPLE__) && defined(__MACH__)
 #define lseek64 lseek
 #define off64_t off_t
 #endif
 
 #define SPARSE_HEADER_MAJOR_VER 1
-#define SPARSE_HEADER_LEN       (sizeof(sparse_header_t))
+#define SPARSE_HEADER_LEN (sizeof(sparse_header_t))
 #define CHUNK_HEADER_LEN (sizeof(chunk_header_t))
 
 static constexpr int64_t COPY_BUF_SIZE = 1024 * 1024;
-static char *copybuf;
+static char* copybuf;
 
-static std::string ErrorString(int err)
-{
-	if (err == -EOVERFLOW) return "EOF while reading file";
-	if (err == -EINVAL) return "Invalid sparse file format";
-	if (err == -ENOMEM) return "Failed allocation while reading file";
-	return android::base::StringPrintf("Unknown error %d", err);
+static std::string ErrorString(int err) {
+  if (err == -EOVERFLOW) return "EOF while reading file";
+  if (err == -EINVAL) return "Invalid sparse file format";
+  if (err == -ENOMEM) return "Failed allocation while reading file";
+  return android::base::StringPrintf("Unknown error %d", err);
 }
 
-static void verbose_error(bool verbose, int err, const char *fmt, ...)
-{
-	if (!verbose) return;
+class SparseFileSource {
+ public:
+  /* Seeks the source ahead by the given offset. */
+  virtual void Seek(int64_t offset) = 0;
 
-	std::string msg = ErrorString(err);
-	if (fmt) {
-		msg += " at ";
-		va_list argp;
-		va_start(argp, fmt);
-		android::base::StringAppendV(&msg, fmt, argp);
-		va_end(argp);
-	}
-	sparse_print_verbose("%s\n", msg.c_str());
+  /* Return the current offset. */
+  virtual int64_t GetOffset() = 0;
+
+  /* Set the current offset. Return 0 if successful. */
+  virtual int SetOffset(int64_t offset) = 0;
+
+  /* Adds the given length from the current offset of the source to the file at the given block.
+   * Return 0 if successful. */
+  virtual int AddToSparseFile(struct sparse_file* s, int64_t len, unsigned int block) = 0;
+
+  /* Get data of fixed size from the current offset and seek len bytes. Return 0 if successful. */
+  virtual int ReadValue(void* ptr, int len) = 0;
+
+  /* Find the crc32 of the next len bytes and seek ahead len bytes. Return 0 if successful. */
+  virtual int GetCrc32(uint32_t* crc32, int64_t len) = 0;
+
+  virtual ~SparseFileSource(){};
+};
+
+class SparseFileFdSource : public SparseFileSource {
+ private:
+  int fd;
+
+ public:
+  SparseFileFdSource(int fd) : fd(fd) {}
+  ~SparseFileFdSource() override {}
+
+  void Seek(int64_t off) override { lseek64(fd, off, SEEK_CUR); }
+
+  int64_t GetOffset() override { return lseek64(fd, 0, SEEK_CUR); }
+
+  int SetOffset(int64_t offset) override {
+    return lseek64(fd, offset, SEEK_SET) == offset ? 0 : -errno;
+  }
+
+  int AddToSparseFile(struct sparse_file* s, int64_t len, unsigned int block) override {
+    return sparse_file_add_fd(s, fd, GetOffset(), len, block);
+  }
+
+  int ReadValue(void* ptr, int len) override { return read_all(fd, ptr, len); }
+
+  int GetCrc32(uint32_t* crc32, int64_t len) override {
+    int chunk;
+    int ret;
+    while (len) {
+      chunk = std::min(len, COPY_BUF_SIZE);
+      ret = read_all(fd, copybuf, chunk);
+      if (ret < 0) {
+        return ret;
+      }
+      *crc32 = sparse_crc32(*crc32, copybuf, chunk);
+      len -= chunk;
+    }
+    return 0;
+  }
+};
+
+class SparseFileBufSource : public SparseFileSource {
+ private:
+  char* buf;
+  int64_t offset;
+
+ public:
+  SparseFileBufSource(char* buf) : buf(buf), offset(0) {}
+  ~SparseFileBufSource() override {}
+
+  void Seek(int64_t off) override {
+    buf += off;
+    offset += off;
+  }
+
+  int64_t GetOffset() override { return offset; }
+
+  int SetOffset(int64_t off) override {
+    buf += off - offset;
+    offset = off;
+    return 0;
+  }
+
+  int AddToSparseFile(struct sparse_file* s, int64_t len, unsigned int block) override {
+    return sparse_file_add_data(s, buf, len, block);
+  }
+
+  int ReadValue(void* ptr, int len) override {
+    memcpy(ptr, buf, len);
+    Seek(len);
+    return 0;
+  }
+
+  int GetCrc32(uint32_t* crc32, int64_t len) override {
+    *crc32 = sparse_crc32(*crc32, buf, len);
+    Seek(len);
+    return 0;
+  }
+};
+
+static void verbose_error(bool verbose, int err, const char* fmt, ...) {
+  if (!verbose) return;
+
+  std::string msg = ErrorString(err);
+  if (fmt) {
+    msg += " at ";
+    va_list argp;
+    va_start(argp, fmt);
+    android::base::StringAppendV(&msg, fmt, argp);
+    va_end(argp);
+  }
+  sparse_print_verbose("%s\n", msg.c_str());
 }
 
-static int process_raw_chunk(struct sparse_file *s, unsigned int chunk_size,
-		int fd, int64_t offset, unsigned int blocks, unsigned int block,
-		uint32_t *crc32)
-{
-	int ret;
-	int chunk;
-	int64_t len = blocks * s->block_size;
+static int process_raw_chunk(struct sparse_file* s, unsigned int chunk_size,
+                             SparseFileSource* source, unsigned int blocks, unsigned int block,
+                             uint32_t* crc32) {
+  int ret;
+  int64_t len = blocks * s->block_size;
 
-	if (chunk_size % s->block_size != 0) {
-		return -EINVAL;
-	}
+  if (chunk_size % s->block_size != 0) {
+    return -EINVAL;
+  }
 
-	if (chunk_size / s->block_size != blocks) {
-		return -EINVAL;
-	}
+  if (chunk_size / s->block_size != blocks) {
+    return -EINVAL;
+  }
 
-	ret = sparse_file_add_fd(s, fd, offset, len, block);
-	if (ret < 0) {
-		return ret;
-	}
+  ret = source->AddToSparseFile(s, len, block);
+  if (ret < 0) {
+    return ret;
+  }
 
-	if (crc32) {
-		while (len) {
-			chunk = std::min(len, COPY_BUF_SIZE);
-			ret = read_all(fd, copybuf, chunk);
-			if (ret < 0) {
-				return ret;
-			}
-			*crc32 = sparse_crc32(*crc32, copybuf, chunk);
-			len -= chunk;
-		}
-	} else {
-		lseek64(fd, len, SEEK_CUR);
-	}
+  if (crc32) {
+    ret = source->GetCrc32(crc32, len);
+    if (ret < 0) {
+      return ret;
+    }
+  } else {
+    source->Seek(len);
+  }
 
-	return 0;
+  return 0;
 }
 
-static int process_fill_chunk(struct sparse_file *s, unsigned int chunk_size,
-		int fd, unsigned int blocks, unsigned int block, uint32_t *crc32)
-{
-	int ret;
-	int chunk;
-	int64_t len = (int64_t)blocks * s->block_size;
-	uint32_t fill_val;
-	uint32_t *fillbuf;
-	unsigned int i;
+static int process_fill_chunk(struct sparse_file* s, unsigned int chunk_size,
+                              SparseFileSource* source, unsigned int blocks, unsigned int block,
+                              uint32_t* crc32) {
+  int ret;
+  int chunk;
+  int64_t len = (int64_t)blocks * s->block_size;
+  uint32_t fill_val;
+  uint32_t* fillbuf;
+  unsigned int i;
 
-	if (chunk_size != sizeof(fill_val)) {
-		return -EINVAL;
-	}
+  if (chunk_size != sizeof(fill_val)) {
+    return -EINVAL;
+  }
 
-	ret = read_all(fd, &fill_val, sizeof(fill_val));
-	if (ret < 0) {
-		return ret;
-	}
+  ret = source->ReadValue(&fill_val, sizeof(fill_val));
+  if (ret < 0) {
+    return ret;
+  }
 
-	ret = sparse_file_add_fill(s, fill_val, len, block);
-	if (ret < 0) {
-		return ret;
-	}
+  ret = sparse_file_add_fill(s, fill_val, len, block);
+  if (ret < 0) {
+    return ret;
+  }
 
-	if (crc32) {
-		/* Fill copy_buf with the fill value */
-		fillbuf = (uint32_t *)copybuf;
-		for (i = 0; i < (COPY_BUF_SIZE / sizeof(fill_val)); i++) {
-			fillbuf[i] = fill_val;
-		}
+  if (crc32) {
+    /* Fill copy_buf with the fill value */
+    fillbuf = (uint32_t*)copybuf;
+    for (i = 0; i < (COPY_BUF_SIZE / sizeof(fill_val)); i++) {
+      fillbuf[i] = fill_val;
+    }
 
-		while (len) {
-			chunk = std::min(len, COPY_BUF_SIZE);
-			*crc32 = sparse_crc32(*crc32, copybuf, chunk);
-			len -= chunk;
-		}
-	}
+    while (len) {
+      chunk = std::min(len, COPY_BUF_SIZE);
+      *crc32 = sparse_crc32(*crc32, copybuf, chunk);
+      len -= chunk;
+    }
+  }
 
-	return 0;
+  return 0;
 }
 
-static int process_skip_chunk(struct sparse_file *s, unsigned int chunk_size,
-		int fd __unused, unsigned int blocks,
-		unsigned int block __unused, uint32_t *crc32)
-{
-	if (chunk_size != 0) {
-		return -EINVAL;
-	}
+static int process_skip_chunk(struct sparse_file* s, unsigned int chunk_size,
+                              SparseFileSource* source __unused, unsigned int blocks,
+                              unsigned int block __unused, uint32_t* crc32) {
+  if (chunk_size != 0) {
+    return -EINVAL;
+  }
 
-	if (crc32) {
-	        int64_t len = (int64_t)blocks * s->block_size;
-		memset(copybuf, 0, COPY_BUF_SIZE);
+  if (crc32) {
+    int64_t len = (int64_t)blocks * s->block_size;
+    memset(copybuf, 0, COPY_BUF_SIZE);
 
-		while (len) {
-			int chunk = std::min(len, COPY_BUF_SIZE);
-			*crc32 = sparse_crc32(*crc32, copybuf, chunk);
-			len -= chunk;
-		}
-	}
+    while (len) {
+      int chunk = std::min(len, COPY_BUF_SIZE);
+      *crc32 = sparse_crc32(*crc32, copybuf, chunk);
+      len -= chunk;
+    }
+  }
 
-	return 0;
+  return 0;
 }
 
-static int process_crc32_chunk(int fd, unsigned int chunk_size, uint32_t *crc32)
-{
-	uint32_t file_crc32;
-	int ret;
+static int process_crc32_chunk(SparseFileSource* source, unsigned int chunk_size, uint32_t* crc32) {
+  uint32_t file_crc32;
 
-	if (chunk_size != sizeof(file_crc32)) {
-		return -EINVAL;
-	}
+  if (chunk_size != sizeof(file_crc32)) {
+    return -EINVAL;
+  }
 
-	ret = read_all(fd, &file_crc32, sizeof(file_crc32));
-	if (ret < 0) {
-		return ret;
-	}
+  int ret = source->ReadValue(&file_crc32, sizeof(file_crc32));
+  if (ret < 0) {
+    return ret;
+  }
 
-	if (crc32 != NULL && file_crc32 != *crc32) {
-		return -EINVAL;
-	}
+  if (crc32 != NULL && file_crc32 != *crc32) {
+    return -EINVAL;
+  }
 
-	return 0;
+  return 0;
 }
 
-static int process_chunk(struct sparse_file *s, int fd, off64_t offset,
-		unsigned int chunk_hdr_sz, chunk_header_t *chunk_header,
-		unsigned int cur_block, uint32_t *crc_ptr)
-{
-	int ret;
-	unsigned int chunk_data_size;
+static int process_chunk(struct sparse_file* s, SparseFileSource* source, unsigned int chunk_hdr_sz,
+                         chunk_header_t* chunk_header, unsigned int cur_block, uint32_t* crc_ptr) {
+  int ret;
+  unsigned int chunk_data_size;
+  int64_t offset = source->GetOffset();
 
-	chunk_data_size = chunk_header->total_sz - chunk_hdr_sz;
+  chunk_data_size = chunk_header->total_sz - chunk_hdr_sz;
 
-	switch (chunk_header->chunk_type) {
-		case CHUNK_TYPE_RAW:
-			ret = process_raw_chunk(s, chunk_data_size, fd, offset,
-					chunk_header->chunk_sz, cur_block, crc_ptr);
-			if (ret < 0) {
-				verbose_error(s->verbose, ret, "data block at %" PRId64, offset);
-				return ret;
-			}
-			return chunk_header->chunk_sz;
-		case CHUNK_TYPE_FILL:
-			ret = process_fill_chunk(s, chunk_data_size, fd,
-					chunk_header->chunk_sz, cur_block, crc_ptr);
-			if (ret < 0) {
-				verbose_error(s->verbose, ret, "fill block at %" PRId64, offset);
-				return ret;
-			}
-			return chunk_header->chunk_sz;
-		case CHUNK_TYPE_DONT_CARE:
-			ret = process_skip_chunk(s, chunk_data_size, fd,
-					chunk_header->chunk_sz, cur_block, crc_ptr);
-			if (chunk_data_size != 0) {
-				if (ret < 0) {
-					verbose_error(s->verbose, ret, "skip block at %" PRId64, offset);
-					return ret;
-				}
-			}
-			return chunk_header->chunk_sz;
-		case CHUNK_TYPE_CRC32:
-			ret = process_crc32_chunk(fd, chunk_data_size, crc_ptr);
-			if (ret < 0) {
-				verbose_error(s->verbose, -EINVAL, "crc block at %" PRId64,
-						offset);
-				return ret;
-			}
-			return 0;
-		default:
-			verbose_error(s->verbose, -EINVAL, "unknown block %04X at %" PRId64,
-					chunk_header->chunk_type, offset);
-	}
+  switch (chunk_header->chunk_type) {
+    case CHUNK_TYPE_RAW:
+      ret =
+          process_raw_chunk(s, chunk_data_size, source, chunk_header->chunk_sz, cur_block, crc_ptr);
+      if (ret < 0) {
+        verbose_error(s->verbose, ret, "data block at %" PRId64, offset);
+        return ret;
+      }
+      return chunk_header->chunk_sz;
+    case CHUNK_TYPE_FILL:
+      ret = process_fill_chunk(s, chunk_data_size, source, chunk_header->chunk_sz, cur_block,
+                               crc_ptr);
+      if (ret < 0) {
+        verbose_error(s->verbose, ret, "fill block at %" PRId64, offset);
+        return ret;
+      }
+      return chunk_header->chunk_sz;
+    case CHUNK_TYPE_DONT_CARE:
+      ret = process_skip_chunk(s, chunk_data_size, source, chunk_header->chunk_sz, cur_block,
+                               crc_ptr);
+      if (chunk_data_size != 0) {
+        if (ret < 0) {
+          verbose_error(s->verbose, ret, "skip block at %" PRId64, offset);
+          return ret;
+        }
+      }
+      return chunk_header->chunk_sz;
+    case CHUNK_TYPE_CRC32:
+      ret = process_crc32_chunk(source, chunk_data_size, crc_ptr);
+      if (ret < 0) {
+        verbose_error(s->verbose, -EINVAL, "crc block at %" PRId64, offset);
+        return ret;
+      }
+      return 0;
+    default:
+      verbose_error(s->verbose, -EINVAL, "unknown block %04X at %" PRId64, chunk_header->chunk_type,
+                    offset);
+  }
 
-	return 0;
+  return 0;
 }
 
-static int sparse_file_read_sparse(struct sparse_file *s, int fd, bool crc)
-{
-	int ret;
-	unsigned int i;
-	sparse_header_t sparse_header;
-	chunk_header_t chunk_header;
-	uint32_t crc32 = 0;
-	uint32_t *crc_ptr = 0;
-	unsigned int cur_block = 0;
-	off64_t offset;
+static int sparse_file_read_sparse(struct sparse_file* s, SparseFileSource* source, bool crc) {
+  int ret;
+  unsigned int i;
+  sparse_header_t sparse_header;
+  chunk_header_t chunk_header;
+  uint32_t crc32 = 0;
+  uint32_t* crc_ptr = 0;
+  unsigned int cur_block = 0;
 
-	if (!copybuf) {
-		copybuf = (char *)malloc(COPY_BUF_SIZE);
-	}
+  if (!copybuf) {
+    copybuf = (char*)malloc(COPY_BUF_SIZE);
+  }
 
-	if (!copybuf) {
-		return -ENOMEM;
-	}
+  if (!copybuf) {
+    return -ENOMEM;
+  }
 
-	if (crc) {
-		crc_ptr = &crc32;
-	}
+  if (crc) {
+    crc_ptr = &crc32;
+  }
 
-	ret = read_all(fd, &sparse_header, sizeof(sparse_header));
-	if (ret < 0) {
-		return ret;
-	}
+  ret = source->ReadValue(&sparse_header, sizeof(sparse_header));
+  if (ret < 0) {
+    return ret;
+  }
 
-	if (sparse_header.magic != SPARSE_HEADER_MAGIC) {
-		return -EINVAL;
-	}
+  if (sparse_header.magic != SPARSE_HEADER_MAGIC) {
+    return -EINVAL;
+  }
 
-	if (sparse_header.major_version != SPARSE_HEADER_MAJOR_VER) {
-		return -EINVAL;
-	}
+  if (sparse_header.major_version != SPARSE_HEADER_MAJOR_VER) {
+    return -EINVAL;
+  }
 
-	if (sparse_header.file_hdr_sz < SPARSE_HEADER_LEN) {
-		return -EINVAL;
-	}
+  if (sparse_header.file_hdr_sz < SPARSE_HEADER_LEN) {
+    return -EINVAL;
+  }
 
-	if (sparse_header.chunk_hdr_sz < sizeof(chunk_header)) {
-		return -EINVAL;
-	}
+  if (sparse_header.chunk_hdr_sz < sizeof(chunk_header)) {
+    return -EINVAL;
+  }
 
-	if (sparse_header.file_hdr_sz > SPARSE_HEADER_LEN) {
-		/* Skip the remaining bytes in a header that is longer than
-		 * we expected.
-		 */
-		lseek64(fd, sparse_header.file_hdr_sz - SPARSE_HEADER_LEN, SEEK_CUR);
-	}
+  if (sparse_header.file_hdr_sz > SPARSE_HEADER_LEN) {
+    /* Skip the remaining bytes in a header that is longer than
+     * we expected.
+     */
+    source->Seek(sparse_header.file_hdr_sz - SPARSE_HEADER_LEN);
+  }
 
-	for (i = 0; i < sparse_header.total_chunks; i++) {
-		ret = read_all(fd, &chunk_header, sizeof(chunk_header));
-		if (ret < 0) {
-			return ret;
-		}
+  for (i = 0; i < sparse_header.total_chunks; i++) {
+    ret = source->ReadValue(&chunk_header, sizeof(chunk_header));
+    if (ret < 0) {
+      return ret;
+    }
 
-		if (sparse_header.chunk_hdr_sz > CHUNK_HEADER_LEN) {
-			/* Skip the remaining bytes in a header that is longer than
-			 * we expected.
-			 */
-			lseek64(fd, sparse_header.chunk_hdr_sz - CHUNK_HEADER_LEN, SEEK_CUR);
-		}
+    if (sparse_header.chunk_hdr_sz > CHUNK_HEADER_LEN) {
+      /* Skip the remaining bytes in a header that is longer than
+       * we expected.
+       */
+      source->Seek(sparse_header.chunk_hdr_sz - CHUNK_HEADER_LEN);
+    }
 
-		offset = lseek64(fd, 0, SEEK_CUR);
+    ret = process_chunk(s, source, sparse_header.chunk_hdr_sz, &chunk_header, cur_block, crc_ptr);
+    if (ret < 0) {
+      return ret;
+    }
 
-		ret = process_chunk(s, fd, offset, sparse_header.chunk_hdr_sz, &chunk_header,
-				cur_block, crc_ptr);
-		if (ret < 0) {
-			return ret;
-		}
+    cur_block += ret;
+  }
 
-		cur_block += ret;
-	}
+  if (sparse_header.total_blks != cur_block) {
+    return -EINVAL;
+  }
 
-	if (sparse_header.total_blks != cur_block) {
-		return -EINVAL;
-	}
-
-	return 0;
+  return 0;
 }
 
-static int sparse_file_read_normal(struct sparse_file *s, int fd)
-{
-	int ret;
-	uint32_t *buf = (uint32_t *)malloc(s->block_size);
-	unsigned int block = 0;
-	int64_t remain = s->len;
-	int64_t offset = 0;
-	unsigned int to_read;
-	unsigned int i;
-	bool sparse_block;
+static int sparse_file_read_normal(struct sparse_file* s, int fd) {
+  int ret;
+  uint32_t* buf = (uint32_t*)malloc(s->block_size);
+  unsigned int block = 0;
+  int64_t remain = s->len;
+  int64_t offset = 0;
+  unsigned int to_read;
+  unsigned int i;
+  bool sparse_block;
 
-	if (!buf) {
-		return -ENOMEM;
-	}
+  if (!buf) {
+    return -ENOMEM;
+  }
 
-	while (remain > 0) {
-		to_read = std::min(remain, (int64_t)(s->block_size));
-		ret = read_all(fd, buf, to_read);
-		if (ret < 0) {
-			error("failed to read sparse file");
-			free(buf);
-			return ret;
-		}
+  while (remain > 0) {
+    to_read = std::min(remain, (int64_t)(s->block_size));
+    ret = read_all(fd, buf, to_read);
+    if (ret < 0) {
+      error("failed to read sparse file");
+      free(buf);
+      return ret;
+    }
 
-		if (to_read == s->block_size) {
-			sparse_block = true;
-			for (i = 1; i < s->block_size / sizeof(uint32_t); i++) {
-				if (buf[0] != buf[i]) {
-					sparse_block = false;
-					break;
-				}
-			}
-		} else {
-			sparse_block = false;
-		}
+    if (to_read == s->block_size) {
+      sparse_block = true;
+      for (i = 1; i < s->block_size / sizeof(uint32_t); i++) {
+        if (buf[0] != buf[i]) {
+          sparse_block = false;
+          break;
+        }
+      }
+    } else {
+      sparse_block = false;
+    }
 
-		if (sparse_block) {
-			/* TODO: add flag to use skip instead of fill for buf[0] == 0 */
-			sparse_file_add_fill(s, buf[0], to_read, block);
-		} else {
-			sparse_file_add_fd(s, fd, offset, to_read, block);
-		}
+    if (sparse_block) {
+      /* TODO: add flag to use skip instead of fill for buf[0] == 0 */
+      sparse_file_add_fill(s, buf[0], to_read, block);
+    } else {
+      sparse_file_add_fd(s, fd, offset, to_read, block);
+    }
 
-		remain -= to_read;
-		offset += to_read;
-		block++;
-	}
+    remain -= to_read;
+    offset += to_read;
+    block++;
+  }
 
-	free(buf);
-	return 0;
+  free(buf);
+  return 0;
 }
 
-int sparse_file_read(struct sparse_file *s, int fd, bool sparse, bool crc)
-{
-	if (crc && !sparse) {
-		return -EINVAL;
-	}
+int sparse_file_read(struct sparse_file* s, int fd, bool sparse, bool crc) {
+  if (crc && !sparse) {
+    return -EINVAL;
+  }
 
-	if (sparse) {
-		return sparse_file_read_sparse(s, fd, crc);
-	} else {
-		return sparse_file_read_normal(s, fd);
-	}
+  if (sparse) {
+    SparseFileFdSource source(fd);
+    return sparse_file_read_sparse(s, &source, crc);
+  } else {
+    return sparse_file_read_normal(s, fd);
+  }
 }
 
-struct sparse_file *sparse_file_import(int fd, bool verbose, bool crc)
-{
-	int ret;
-	sparse_header_t sparse_header;
-	int64_t len;
-	struct sparse_file *s;
-
-	ret = read_all(fd, &sparse_header, sizeof(sparse_header));
-	if (ret < 0) {
-		verbose_error(verbose, ret, "header");
-		return NULL;
-	}
-
-	if (sparse_header.magic != SPARSE_HEADER_MAGIC) {
-		verbose_error(verbose, -EINVAL, "header magic");
-		return NULL;
-	}
-
-	if (sparse_header.major_version != SPARSE_HEADER_MAJOR_VER) {
-		verbose_error(verbose, -EINVAL, "header major version");
-		return NULL;
-	}
-
-	if (sparse_header.file_hdr_sz < SPARSE_HEADER_LEN) {
-		return NULL;
-	}
-
-	if (sparse_header.chunk_hdr_sz < sizeof(chunk_header_t)) {
-		return NULL;
-	}
-
-	len = (int64_t)sparse_header.total_blks * sparse_header.blk_sz;
-	s = sparse_file_new(sparse_header.blk_sz, len);
-	if (!s) {
-		verbose_error(verbose, -EINVAL, NULL);
-		return NULL;
-	}
-
-	ret = lseek64(fd, 0, SEEK_SET);
-	if (ret < 0) {
-		verbose_error(verbose, ret, "seeking");
-		sparse_file_destroy(s);
-		return NULL;
-	}
-
-	s->verbose = verbose;
-
-	ret = sparse_file_read(s, fd, true, crc);
-	if (ret < 0) {
-		sparse_file_destroy(s);
-		return NULL;
-	}
-
-	return s;
+int sparse_file_read_buf(struct sparse_file* s, char* buf, bool crc) {
+  SparseFileBufSource source(buf);
+  return sparse_file_read_sparse(s, &source, crc);
 }
 
-struct sparse_file *sparse_file_import_auto(int fd, bool crc, bool verbose)
-{
-	struct sparse_file *s;
-	int64_t len;
-	int ret;
+static struct sparse_file* sparse_file_import_source(SparseFileSource* source, bool verbose,
+                                                     bool crc) {
+  int ret;
+  sparse_header_t sparse_header;
+  int64_t len;
+  struct sparse_file* s;
 
-	s = sparse_file_import(fd, verbose, crc);
-	if (s) {
-		return s;
-	}
+  ret = source->ReadValue(&sparse_header, sizeof(sparse_header));
+  if (ret < 0) {
+    verbose_error(verbose, ret, "header");
+    return NULL;
+  }
 
-	len = lseek64(fd, 0, SEEK_END);
-	if (len < 0) {
-		return NULL;
-	}
+  if (sparse_header.magic != SPARSE_HEADER_MAGIC) {
+    verbose_error(verbose, -EINVAL, "header magic");
+    return NULL;
+  }
 
-	lseek64(fd, 0, SEEK_SET);
+  if (sparse_header.major_version != SPARSE_HEADER_MAJOR_VER) {
+    verbose_error(verbose, -EINVAL, "header major version");
+    return NULL;
+  }
 
-	s = sparse_file_new(4096, len);
-	if (!s) {
-		return NULL;
-	}
+  if (sparse_header.file_hdr_sz < SPARSE_HEADER_LEN) {
+    return NULL;
+  }
 
-	ret = sparse_file_read_normal(s, fd);
-	if (ret < 0) {
-		sparse_file_destroy(s);
-		return NULL;
-	}
+  if (sparse_header.chunk_hdr_sz < sizeof(chunk_header_t)) {
+    return NULL;
+  }
 
-	return s;
+  len = (int64_t)sparse_header.total_blks * sparse_header.blk_sz;
+  s = sparse_file_new(sparse_header.blk_sz, len);
+  if (!s) {
+    verbose_error(verbose, -EINVAL, NULL);
+    return NULL;
+  }
+
+  ret = source->SetOffset(0);
+  if (ret < 0) {
+    verbose_error(verbose, ret, "seeking");
+    sparse_file_destroy(s);
+    return NULL;
+  }
+
+  s->verbose = verbose;
+
+  ret = sparse_file_read_sparse(s, source, crc);
+  if (ret < 0) {
+    sparse_file_destroy(s);
+    return NULL;
+  }
+
+  return s;
+}
+
+struct sparse_file* sparse_file_import(int fd, bool verbose, bool crc) {
+  SparseFileFdSource source(fd);
+  return sparse_file_import_source(&source, verbose, crc);
+}
+
+struct sparse_file* sparse_file_import_buf(char* buf, bool verbose, bool crc) {
+  SparseFileBufSource source(buf);
+  return sparse_file_import_source(&source, verbose, crc);
+}
+
+struct sparse_file* sparse_file_import_auto(int fd, bool crc, bool verbose) {
+  struct sparse_file* s;
+  int64_t len;
+  int ret;
+
+  s = sparse_file_import(fd, verbose, crc);
+  if (s) {
+    return s;
+  }
+
+  len = lseek64(fd, 0, SEEK_END);
+  if (len < 0) {
+    return NULL;
+  }
+
+  lseek64(fd, 0, SEEK_SET);
+
+  s = sparse_file_new(4096, len);
+  if (!s) {
+    return NULL;
+  }
+
+  ret = sparse_file_read_normal(s, fd);
+  if (ret < 0) {
+    sparse_file_destroy(s);
+    return NULL;
+  }
+
+  return s;
 }
diff --git a/libstats/OWNERS b/libstats/OWNERS
new file mode 100644
index 0000000..ed06fbc
--- /dev/null
+++ b/libstats/OWNERS
@@ -0,0 +1,4 @@
+bookatz@google.com
+joeo@google.com
+yaochen@google.com
+yanglu@google.com
diff --git a/libstats/stats_event_list.c b/libstats/stats_event_list.c
index 966bb08..3d746db 100644
--- a/libstats/stats_event_list.c
+++ b/libstats/stats_event_list.c
@@ -131,7 +131,7 @@
 }
 
 static int __write_to_stats_daemon(struct iovec* vec, size_t nr) {
-    int ret, save_errno;
+    int save_errno;
     struct timespec ts;
     size_t len, i;
 
@@ -145,14 +145,7 @@
     save_errno = errno;
     clock_gettime(CLOCK_REALTIME, &ts);
 
-    ret = 0;
-
-    ssize_t retval;
-    retval = (*statsdLoggerWrite.write)(&ts, vec, nr);
-    if (ret >= 0) {
-        ret = retval;
-    }
-
+    int ret = (int)(*statsdLoggerWrite.write)(&ts, vec, nr);
     errno = save_errno;
     return ret;
 }
@@ -178,4 +171,4 @@
     ret = write_to_statsd(vec, nr);
     errno = save_errno;
     return ret;
-}
\ No newline at end of file
+}
diff --git a/libsync/Android.bp b/libsync/Android.bp
index 3fae5e6..c95563d 100644
--- a/libsync/Android.bp
+++ b/libsync/Android.bp
@@ -40,13 +40,6 @@
 }
 
 cc_test {
-    name: "sync_test",
-    defaults: ["libsync_defaults"],
-    gtest: false,
-    srcs: ["sync_test.c"],
-}
-
-cc_test {
     name: "sync-unit-tests",
     shared_libs: ["libsync"],
     srcs: ["tests/sync_test.cpp"],
diff --git a/libsync/OWNERS b/libsync/OWNERS
new file mode 100644
index 0000000..dc61733
--- /dev/null
+++ b/libsync/OWNERS
@@ -0,0 +1,3 @@
+ghackmann@google.com
+jessehall@google.com
+marissaw@google.com
diff --git a/libsync/include/android/sync.h b/libsync/include/android/sync.h
index 68f74a0..32bb878 100644
--- a/libsync/include/android/sync.h
+++ b/libsync/include/android/sync.h
@@ -41,28 +41,8 @@
 
 __BEGIN_DECLS
 
-struct sync_fence_info_data {
- uint32_t len;
- char name[32];
- int32_t status;
- uint8_t pt_info[0];
-};
-
-struct sync_pt_info {
- uint32_t len;
- char obj_name[32];
- char driver_name[32];
- int32_t status;
- uint64_t timestamp_ns;
- uint8_t driver_data[0];
-};
-
 /* timeout in msecs */
 int sync_wait(int fd, int timeout);
-struct sync_fence_info_data *sync_fence_info(int fd);
-struct sync_pt_info *sync_pt_info(struct sync_fence_info_data *info,
-                                  struct sync_pt_info *itr);
-void sync_fence_info_free(struct sync_fence_info_data *info);
 
 __END_DECLS
 
diff --git a/libsync/include/ndk/sync.h b/libsync/include/ndk/sync.h
index 3c55783..49f01e1 100644
--- a/libsync/include/ndk/sync.h
+++ b/libsync/include/ndk/sync.h
@@ -14,6 +14,15 @@
  *  limitations under the License.
  */
 
+/**
+ * @addtogroup Sync
+ * @{
+ */
+
+/**
+ * @file sync.h
+ */
+
 #ifndef ANDROID_SYNC_H
 #define ANDROID_SYNC_H
 
@@ -23,8 +32,6 @@
 
 __BEGIN_DECLS
 
-#if __ANDROID_API__ >= __ANDROID_API_O__
-
 /* Fences indicate the status of an asynchronous task. They are initially
  * in unsignaled state (0), and make a one-time transition to either signaled
  * (1) or error (< 0) state. A sync file is a collection of one or more fences;
@@ -54,14 +61,14 @@
  * The original fences remain valid, and the caller is responsible for closing
  * them.
  */
-int32_t sync_merge(const char *name, int32_t fd1, int32_t fd2);
+int32_t sync_merge(const char* name, int32_t fd1, int32_t fd2) __INTRODUCED_IN(26);
 
 /**
  * Retrieve detailed information about a sync file and its fences.
  *
  * The returned sync_file_info must be freed by calling sync_file_info_free().
  */
-struct sync_file_info *sync_file_info(int32_t fd);
+struct sync_file_info* sync_file_info(int32_t fd) __INTRODUCED_IN(26);
 
 /**
  * Get the array of fence infos from the sync file's info.
@@ -79,10 +86,10 @@
 }
 
 /** Free a struct sync_file_info structure */
-void sync_file_info_free(struct sync_file_info *info);
-
-#endif // __ANDROID_API__ >= __ANDROID_API_O__
+void sync_file_info_free(struct sync_file_info* info) __INTRODUCED_IN(26);
 
 __END_DECLS
 
 #endif /* ANDROID_SYNC_H */
+
+/** @} */
diff --git a/libsync/sync.c b/libsync/sync.c
index 6b187fa..b8c48c7 100644
--- a/libsync/sync.c
+++ b/libsync/sync.c
@@ -30,6 +30,29 @@
 
 #include <android/sync.h>
 
+/* Prototypes for deprecated functions that used to be declared in the legacy
+ * android/sync.h. They've been moved here to make sure new code does not use
+ * them, but the functions are still defined to avoid breaking existing
+ * binaries. Eventually they can be removed altogether.
+ */
+struct sync_fence_info_data {
+    uint32_t len;
+    char name[32];
+    int32_t status;
+    uint8_t pt_info[0];
+};
+struct sync_pt_info {
+    uint32_t len;
+    char obj_name[32];
+    char driver_name[32];
+    int32_t status;
+    uint64_t timestamp_ns;
+    uint8_t driver_data[0];
+};
+struct sync_fence_info_data* sync_fence_info(int fd);
+struct sync_pt_info* sync_pt_info(struct sync_fence_info_data* info, struct sync_pt_info* itr);
+void sync_fence_info_free(struct sync_fence_info_data* info);
+
 /* Legacy Sync API */
 
 struct sync_legacy_merge_data {
diff --git a/libsync/sync_test.c b/libsync/sync_test.c
deleted file mode 100644
index f1ffdcf..0000000
--- a/libsync/sync_test.c
+++ /dev/null
@@ -1,147 +0,0 @@
-/*
- *  sync_test.c
- *
- *   Copyright 2012 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 <pthread.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <android/sync.h>
-#include "sw_sync.h"
-
-pthread_mutex_t printf_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-struct sync_thread_data {
-    int thread_no;
-    int fd[2];
-};
-
-void *sync_thread(void *data)
-{
-    struct sync_thread_data *sync_data = data;
-    struct sync_fence_info_data *info;
-    int err;
-    int i;
-
-    for (i = 0; i < 2; i++) {
-        err = sync_wait(sync_data->fd[i], 10000);
-
-        pthread_mutex_lock(&printf_mutex);
-        if (err < 0) {
-            printf("thread %d wait %d failed: %s\n", sync_data->thread_no,
-                   i, strerror(errno));
-        } else {
-            printf("thread %d wait %d done\n", sync_data->thread_no, i);
-        }
-        info = sync_fence_info(sync_data->fd[i]);
-        if (info) {
-            struct sync_pt_info *pt_info = NULL;
-            printf("  fence %s %d\n", info->name, info->status);
-
-            while ((pt_info = sync_pt_info(info, pt_info))) {
-                int ts_sec = pt_info->timestamp_ns / 1000000000LL;
-                int ts_usec = (pt_info->timestamp_ns % 1000000000LL) / 1000LL;
-                printf("    pt %s %s %d %d.%06d", pt_info->obj_name,
-                       pt_info->driver_name, pt_info->status,
-                       ts_sec, ts_usec);
-                if (!strcmp(pt_info->driver_name, "sw_sync"))
-                    printf(" val=%d\n", *(uint32_t *)pt_info->driver_data);
-                else
-                    printf("\n");
-            }
-            sync_fence_info_free(info);
-        }
-        pthread_mutex_unlock(&printf_mutex);
-    }
-
-    return NULL;
-}
-
-int main(int argc __attribute__((unused)), char *argv[] __attribute__((unused)))
-{
-    struct sync_thread_data sync_data[4];
-    pthread_t threads[4];
-    int sync_timeline_fd;
-    int i, j;
-    char str[256];
-
-    sync_timeline_fd = sw_sync_timeline_create();
-    if (sync_timeline_fd < 0) {
-        perror("can't create sw_sync_timeline:");
-        return 1;
-    }
-
-    for (i = 0; i < 3; i++) {
-        sync_data[i].thread_no = i;
-
-        for (j = 0; j < 2; j++) {
-            unsigned val = i + j * 3 + 1;
-            snprintf(str, sizeof(str), "test_fence%d-%d", i, j);
-            int fd = sw_sync_fence_create(sync_timeline_fd, str, val);
-            if (fd < 0) {
-                printf("can't create sync pt %d: %s", val, strerror(errno));
-                return 1;
-            }
-            sync_data[i].fd[j] = fd;
-            printf("sync_data[%d].fd[%d] = %d;\n", i, j, fd);
-
-        }
-    }
-
-    sync_data[3].thread_no = 3;
-    for (j = 0; j < 2; j++) {
-        snprintf(str, sizeof(str), "merged_fence%d", j);
-        sync_data[3].fd[j] = sync_merge(str, sync_data[0].fd[j], sync_data[1].fd[j]);
-        if (sync_data[3].fd[j] < 0) {
-            printf("can't merge sync pts %d and %d: %s\n",
-                   sync_data[0].fd[j], sync_data[1].fd[j], strerror(errno));
-            return 1;
-        }
-    }
-
-    for (i = 0; i < 4; i++)
-        pthread_create(&threads[i], NULL, sync_thread, &sync_data[i]);
-
-
-    for (i = 0; i < 3; i++) {
-        int err;
-        printf("press enter to inc to %d\n", i+1);
-        fgets(str, sizeof(str), stdin);
-        err = sw_sync_timeline_inc(sync_timeline_fd, 1);
-        if (err < 0) {
-            perror("can't increment sync obj:");
-            return 1;
-        }
-    }
-
-    printf("press enter to close sync_timeline\n");
-    fgets(str, sizeof(str), stdin);
-
-    close(sync_timeline_fd);
-
-    printf("press enter to end test\n");
-    fgets(str, sizeof(str), stdin);
-
-    for (i = 0; i < 3; i++) {
-        void *val;
-        pthread_join(threads[i], &val);
-    }
-
-    return 0;
-}
diff --git a/libsync/tests/sync_test.cpp b/libsync/tests/sync_test.cpp
index 0fb86d6..011b09d 100644
--- a/libsync/tests/sync_test.cpp
+++ b/libsync/tests/sync_test.cpp
@@ -15,6 +15,35 @@
 #include <random>
 #include <unordered_map>
 
+/* These deprecated declarations were in the legacy android/sync.h. They've been removed to
+ * encourage code to move to the modern equivalents. But they are still implemented in libsync.so
+ * to avoid breaking existing binaries; as long as that's true we should keep testing them here.
+ * That means making local copies of the declarations.
+ */
+extern "C" {
+
+struct sync_fence_info_data {
+    uint32_t len;
+    char name[32];
+    int32_t status;
+    uint8_t pt_info[0];
+};
+
+struct sync_pt_info {
+    uint32_t len;
+    char obj_name[32];
+    char driver_name[32];
+    int32_t status;
+    uint64_t timestamp_ns;
+    uint8_t driver_data[0];
+};
+
+struct sync_fence_info_data* sync_fence_info(int fd);
+struct sync_pt_info* sync_pt_info(struct sync_fence_info_data* info, struct sync_pt_info* itr);
+void sync_fence_info_free(struct sync_fence_info_data* info);
+
+}  // extern "C"
+
 // TODO: better stress tests?
 // Handle more than 64 fd's simultaneously, i.e. fix sync_fence_info's 4k limit.
 // Handle wraparound in timelines like nvidia.
diff --git a/libsystem/Android.bp b/libsystem/Android.bp
index 82bf1bc..2e22b43 100644
--- a/libsystem/Android.bp
+++ b/libsystem/Android.bp
@@ -1,6 +1,7 @@
 cc_library_headers {
     name: "libsystem_headers",
     vendor_available: true,
+    recovery_available: true,
     host_supported: true,
     export_include_dirs: ["include"],
 
diff --git a/libsysutils/include/sysutils/FrameworkClient.h b/libsysutils/include/sysutils/FrameworkClient.h
deleted file mode 100644
index 4a3f0de..0000000
--- a/libsysutils/include/sysutils/FrameworkClient.h
+++ /dev/null
@@ -1,21 +0,0 @@
-#ifndef _FRAMEWORK_CLIENT_H
-#define _FRAMEWORK_CLIENT_H
-
-#include "List.h"
-
-#include <pthread.h>
-
-class FrameworkClient {
-    int             mSocket;
-    pthread_mutex_t mWriteMutex;
-
-public:
-    FrameworkClient(int sock);
-    virtual ~FrameworkClient() {}
-
-    int sendMsg(const char *msg);
-    int sendMsg(const char *msg, const char *data);
-};
-
-typedef android::sysutils::List<FrameworkClient *> FrameworkClientCollection;
-#endif
diff --git a/libsysutils/include/sysutils/OWNERS b/libsysutils/include/sysutils/OWNERS
new file mode 100644
index 0000000..b78918e
--- /dev/null
+++ b/libsysutils/include/sysutils/OWNERS
@@ -0,0 +1,2 @@
+per-file Netlink* = ek@google.com
+per-file Netlink* = lorenzo@google.com
diff --git a/libsysutils/src/FrameworkClient.cpp b/libsysutils/src/FrameworkClient.cpp
deleted file mode 100644
index 72b3d0a..0000000
--- a/libsysutils/src/FrameworkClient.cpp
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * Copyright (C) 2009-2016 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.
- */
-
-#define LOG_TAG "FrameworkClient"
-
-#include <alloca.h>
-#include <errno.h>
-#include <pthread.h>
-#include <sys/types.h>
-
-#include <android/log.h>
-#include <sysutils/FrameworkClient.h>
-
-FrameworkClient::FrameworkClient(int socket) {
-    mSocket = socket;
-    pthread_mutex_init(&mWriteMutex, NULL);
-}
-
-int FrameworkClient::sendMsg(const char *msg) {
-    int ret;
-    if (mSocket < 0) {
-        errno = EHOSTUNREACH;
-        return -1;
-    }
-
-    pthread_mutex_lock(&mWriteMutex);
-    ret = TEMP_FAILURE_RETRY(write(mSocket, msg, strlen(msg) +1));
-    if (ret < 0) {
-        SLOGW("Unable to send msg '%s' (%s)", msg, strerror(errno));
-    }
-    pthread_mutex_unlock(&mWriteMutex);
-    return 0;
-}
-
-int FrameworkClient::sendMsg(const char *msg, const char *data) {
-    size_t bufflen = strlen(msg) + strlen(data) + 1;
-    char *buffer = (char *) alloca(bufflen);
-    if (!buffer) {
-        errno = -ENOMEM;
-        return -1;
-    }
-    snprintf(buffer, bufflen, "%s%s", msg, data);
-    return sendMsg(buffer);
-}
-
diff --git a/libsysutils/src/OWNERS b/libsysutils/src/OWNERS
new file mode 100644
index 0000000..b78918e
--- /dev/null
+++ b/libsysutils/src/OWNERS
@@ -0,0 +1,2 @@
+per-file Netlink* = ek@google.com
+per-file Netlink* = lorenzo@google.com
diff --git a/libunwindstack/Android.bp b/libunwindstack/Android.bp
index adbacdb..df5da65 100644
--- a/libunwindstack/Android.bp
+++ b/libunwindstack/Android.bp
@@ -38,6 +38,7 @@
 cc_library {
     name: "libunwindstack",
     vendor_available: true,
+    recovery_available: true,
     vndk: {
         enabled: true,
         support_system_process: true,
@@ -47,6 +48,8 @@
 
     srcs: [
         "ArmExidx.cpp",
+        "DexFile.cpp",
+        "DexFiles.cpp",
         "DwarfCfa.cpp",
         "DwarfEhFrameWithHdr.cpp",
         "DwarfMemory.cpp",
@@ -60,6 +63,7 @@
         "MapInfo.cpp",
         "Maps.cpp",
         "Memory.cpp",
+        "LocalUnwinder.cpp",
         "Regs.cpp",
         "RegsArm.cpp",
         "RegsArm64.cpp",
@@ -85,11 +89,21 @@
         },
         vendor: {
             cflags: ["-DNO_LIBDEXFILE_SUPPORT"],
-            exclude_static_libs: ["libunwindstack_dex"],
+            exclude_srcs: [
+                "DexFile.cpp",
+                "DexFiles.cpp",
+            ],
+            exclude_shared_libs: ["libdexfile"],
+        },
+        recovery: {
+            cflags: ["-DNO_LIBDEXFILE_SUPPORT"],
+            exclude_srcs: [
+                "DexFile.cpp",
+                "DexFiles.cpp",
+            ],
             exclude_shared_libs: ["libdexfile"],
         },
     },
-    whole_static_libs: ["libunwindstack_dex"],
 
     arch: {
         x86: {
@@ -106,6 +120,10 @@
         },
     },
 
+    static_libs: [
+        "libprocinfo",
+    ],
+
     shared_libs: [
         "libbase",
         "libdexfile",
@@ -114,76 +132,21 @@
     ],
 }
 
-// Isolate the dex file processing into a separate library. Currently,
-// it is necessary to add art include directories directly, which also
-// adds the art elf.h file in the include path, overriding the system one.
-// Work to isolate libdexfile is b/72216369.
-cc_library_static {
-    name: "libunwindstack_dex",
-    vendor_available: false,
-    defaults: ["libunwindstack_flags"],
-
-    cflags: [
-        "-Wexit-time-destructors",
-    ],
-
-    srcs: [
-        "DexFile.cpp",
-        "DexFiles.cpp",
-    ],
-    target: {
-        // Always disable optimizations for host to make it easier to debug.
-        host: {
-            cflags: [
-                "-O0",
-                "-g",
-            ],
-        },
-    },
-
-    shared_libs: [
-        "libbase",
-        "libdexfile",
-    ],
-    local_include_dirs: ["include"],
-    allow_undefined_symbols: true,
-
-    // libdexfile will eventually properly export headers, for now include
-    // these directly.
-    include_dirs: [
-        "art/runtime",
-    ],
-}
-
 //-------------------------------------------------------------------------
 // Unit Tests
 //-------------------------------------------------------------------------
 cc_test_library {
-    name: "libunwindstack_dex_test",
-    vendor_available: false,
+    name: "libunwindstack_local",
     defaults: ["libunwindstack_flags"],
+    srcs: ["tests/TestLocal.cpp"],
 
-    shared: {
-        enabled: false,
-    },
-
-    srcs: [
-        "tests/DexFileTest.cpp",
-        "tests/DexFilesTest.cpp",
+    cflags: [
+        "-O0",
+        "-g",
     ],
-    local_include_dirs: ["include"],
-    allow_undefined_symbols: true,
 
     shared_libs: [
-        "libbase",
         "libunwindstack",
-        "libdexfile",
-    ],
-
-    // libdexfile will eventually properly export headers, for now include
-    // these directly.
-    include_dirs: [
-        "art/runtime",
     ],
 }
 
@@ -194,6 +157,8 @@
     srcs: [
         "tests/ArmExidxDecodeTest.cpp",
         "tests/ArmExidxExtractTest.cpp",
+        "tests/DexFileTest.cpp",
+        "tests/DexFilesTest.cpp",
         "tests/DwarfCfaLogTest.cpp",
         "tests/DwarfCfaTest.cpp",
         "tests/DwarfDebugFrameTest.cpp",
@@ -211,6 +176,7 @@
         "tests/ElfTest.cpp",
         "tests/ElfTestUtils.cpp",
         "tests/JitDebugTest.cpp",
+        "tests/LocalUnwinderTest.cpp",
         "tests/LogFake.cpp",
         "tests/MapInfoGetElfTest.cpp",
         "tests/MapInfoGetLoadBiasTest.cpp",
@@ -243,28 +209,33 @@
         "liblog",
         "liblzma",
         "libunwindstack",
+        "libdexfile",
     ],
 
     static_libs: [
         "libgmock",
     ],
 
-    whole_static_libs: ["libunwindstack_dex_test"],
-
+    test_suites: ["device-tests"],
     data: [
         "tests/files/elf32.xz",
         "tests/files/elf64.xz",
         "tests/files/offline/art_quick_osr_stub_arm/*",
         "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_hdr_begin_x86_64/*",
         "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/offset_arm/*",
         "tests/files/offline/straddle_arm/*",
         "tests/files/offline/straddle_arm64/*",
     ],
+    required: [
+        "libunwindstack_local",
+    ],
 }
 
 //-------------------------------------------------------------------------
@@ -279,6 +250,15 @@
         "libbase",
         "liblzma",
     ],
+    target: {
+        // Always disable optimizations for host to make it easier to debug.
+        host: {
+            cflags: [
+                "-O0",
+                "-g",
+            ],
+        },
+    },
 }
 
 cc_binary {
diff --git a/libunwindstack/ArmExidx.cpp b/libunwindstack/ArmExidx.cpp
index 6e397e3..818f5d1 100644
--- a/libunwindstack/ArmExidx.cpp
+++ b/libunwindstack/ArmExidx.cpp
@@ -31,6 +31,8 @@
 
 namespace unwindstack {
 
+static constexpr uint8_t LOG_CFA_REG = 64;
+
 void ArmExidx::LogRawData() {
   std::string log_str("Raw Data:");
   for (const uint8_t data : data_) {
@@ -63,8 +65,10 @@
   if (data == 1) {
     // This is a CANT UNWIND entry.
     status_ = ARM_STATUS_NO_UNWIND;
-    if (log_) {
-      log(log_indent_, "Raw Data: 0x00 0x00 0x00 0x01");
+    if (log_type_ != ARM_LOG_NONE) {
+      if (log_type_ == ARM_LOG_FULL) {
+        log(log_indent_, "Raw Data: 0x00 0x00 0x00 0x01");
+      }
       log(log_indent_, "[cantunwind]");
     }
     return false;
@@ -86,7 +90,7 @@
       // If this didn't end with a finish op, add one.
       data_.push_back(ARM_OP_FINISH);
     }
-    if (log_) {
+    if (log_type_ == ARM_LOG_FULL) {
       LogRawData();
     }
     return true;
@@ -163,7 +167,7 @@
     data_.push_back(ARM_OP_FINISH);
   }
 
-  if (log_) {
+  if (log_type_ == ARM_LOG_FULL) {
     LogRawData();
   }
   return true;
@@ -190,32 +194,45 @@
   registers |= byte;
   if (registers == 0) {
     // 10000000 00000000: Refuse to unwind
-    if (log_) {
+    if (log_type_ != ARM_LOG_NONE) {
       log(log_indent_, "Refuse to unwind");
     }
     status_ = ARM_STATUS_NO_UNWIND;
     return false;
   }
   // 1000iiii iiiiiiii: Pop up to 12 integer registers under masks {r15-r12}, {r11-r4}
-  if (log_) {
-    bool add_comma = false;
-    std::string msg = "pop {";
-    for (size_t i = 0; i < 12; i++) {
-      if (registers & (1 << i)) {
-        if (add_comma) {
-          msg += ", ";
+  registers <<= 4;
+
+  if (log_type_ != ARM_LOG_NONE) {
+    if (log_type_ == ARM_LOG_FULL) {
+      bool add_comma = false;
+      std::string msg = "pop {";
+      for (size_t reg = 4; reg < 16; reg++) {
+        if (registers & (1 << reg)) {
+          if (add_comma) {
+            msg += ", ";
+          }
+          msg += android::base::StringPrintf("r%zu", reg);
+          add_comma = true;
         }
-        msg += android::base::StringPrintf("r%zu", i + 4);
-        add_comma = true;
+      }
+      log(log_indent_, "%s}", msg.c_str());
+    } else {
+      uint32_t cfa_offset = __builtin_popcount(registers) * 4;
+      log_cfa_offset_ += cfa_offset;
+      for (size_t reg = 4; reg < 16; reg++) {
+        if (registers & (1 << reg)) {
+          log_regs_[reg] = cfa_offset;
+          cfa_offset -= 4;
+        }
       }
     }
-    log(log_indent_, "%s}", msg.c_str());
+
     if (log_skip_execution_) {
       return true;
     }
   }
 
-  registers <<= 4;
   for (size_t reg = 4; reg < 16; reg++) {
     if (registers & (1 << reg)) {
       if (!process_memory_->Read32(cfa_, &(*regs_)[reg])) {
@@ -246,15 +263,20 @@
   if (bits == 13 || bits == 15) {
     // 10011101: Reserved as prefix for ARM register to register moves
     // 10011111: Reserved as prefix for Intel Wireless MMX register to register moves
-    if (log_) {
+    if (log_type_ != ARM_LOG_NONE) {
       log(log_indent_, "[Reserved]");
     }
     status_ = ARM_STATUS_RESERVED;
     return false;
   }
   // 1001nnnn: Set vsp = r[nnnn] (nnnn != 13, 15)
-  if (log_) {
-    log(log_indent_, "vsp = r%d", bits);
+  if (log_type_ != ARM_LOG_NONE) {
+    if (log_type_ == ARM_LOG_FULL) {
+      log(log_indent_, "vsp = r%d", bits);
+    } else {
+      log_regs_[LOG_CFA_REG] = bits;
+    }
+
     if (log_skip_execution_) {
       return true;
     }
@@ -270,17 +292,36 @@
 
   // 10100nnn: Pop r4-r[4+nnn]
   // 10101nnn: Pop r4-r[4+nnn], r14
-  if (log_) {
-    std::string msg = "pop {r4";
+  if (log_type_ != ARM_LOG_NONE) {
     uint8_t end_reg = byte & 0x7;
-    if (end_reg) {
-      msg += android::base::StringPrintf("-r%d", 4 + end_reg);
-    }
-    if (byte & 0x8) {
-      log(log_indent_, "%s, r14}", msg.c_str());
+    if (log_type_ == ARM_LOG_FULL) {
+      std::string msg = "pop {r4";
+      if (end_reg) {
+        msg += android::base::StringPrintf("-r%d", 4 + end_reg);
+      }
+      if (byte & 0x8) {
+        log(log_indent_, "%s, r14}", msg.c_str());
+      } else {
+        log(log_indent_, "%s}", msg.c_str());
+      }
     } else {
-      log(log_indent_, "%s}", msg.c_str());
+      end_reg += 4;
+      uint32_t cfa_offset = (end_reg - 3) * 4;
+      if (byte & 0x8) {
+        cfa_offset += 4;
+      }
+      log_cfa_offset_ += cfa_offset;
+
+      for (uint8_t reg = 4; reg <= end_reg; reg++) {
+        log_regs_[reg] = cfa_offset;
+        cfa_offset -= 4;
+      }
+
+      if (byte & 0x8) {
+        log_regs_[14] = cfa_offset;
+      }
     }
+
     if (log_skip_execution_) {
       return true;
     }
@@ -307,8 +348,11 @@
 
 inline bool ArmExidx::DecodePrefix_10_11_0000() {
   // 10110000: Finish
-  if (log_) {
-    log(log_indent_, "finish");
+  if (log_type_ != ARM_LOG_NONE) {
+    if (log_type_ == ARM_LOG_FULL) {
+      log(log_indent_, "finish");
+    }
+
     if (log_skip_execution_) {
       status_ = ARM_STATUS_FINISH;
       return false;
@@ -326,7 +370,7 @@
 
   if (byte == 0) {
     // 10110001 00000000: Spare
-    if (log_) {
+    if (log_type_ != ARM_LOG_NONE) {
       log(log_indent_, "Spare");
     }
     status_ = ARM_STATUS_SPARE;
@@ -334,7 +378,7 @@
   }
   if (byte >> 4) {
     // 10110001 xxxxyyyy: Spare (xxxx != 0000)
-    if (log_) {
+    if (log_type_ != ARM_LOG_NONE) {
       log(log_indent_, "Spare");
     }
     status_ = ARM_STATUS_SPARE;
@@ -342,19 +386,32 @@
   }
 
   // 10110001 0000iiii: Pop integer registers under mask {r3, r2, r1, r0}
-  if (log_) {
-    bool add_comma = false;
-    std::string msg = "pop {";
-    for (size_t i = 0; i < 4; i++) {
-      if (byte & (1 << i)) {
-        if (add_comma) {
-          msg += ", ";
+  if (log_type_ != ARM_LOG_NONE) {
+    if (log_type_ == ARM_LOG_FULL) {
+      bool add_comma = false;
+      std::string msg = "pop {";
+      for (size_t i = 0; i < 4; i++) {
+        if (byte & (1 << i)) {
+          if (add_comma) {
+            msg += ", ";
+          }
+          msg += android::base::StringPrintf("r%zu", i);
+          add_comma = true;
         }
-        msg += android::base::StringPrintf("r%zu", i);
-        add_comma = true;
+      }
+      log(log_indent_, "%s}", msg.c_str());
+    } else {
+      byte &= 0xf;
+      uint32_t cfa_offset = __builtin_popcount(byte) * 4;
+      log_cfa_offset_ += cfa_offset;
+      for (size_t reg = 0; reg < 4; reg++) {
+        if (byte & (1 << reg)) {
+          log_regs_[reg] = cfa_offset;
+          cfa_offset -= 4;
+        }
       }
     }
-    log(log_indent_, "%s}", msg.c_str());
+
     if (log_skip_execution_) {
       return true;
     }
@@ -373,6 +430,15 @@
   return true;
 }
 
+inline void ArmExidx::AdjustRegisters(int32_t offset) {
+  for (auto& entry : log_regs_) {
+    if (entry.first >= LOG_CFA_REG) {
+      break;
+    }
+    entry.second += offset;
+  }
+}
+
 inline bool ArmExidx::DecodePrefix_10_11_0010() {
   // 10110010 uleb128: vsp = vsp + 0x204 + (uleb128 << 2)
   uint32_t result = 0;
@@ -387,8 +453,15 @@
     shift += 7;
   } while (byte & 0x80);
   result <<= 2;
-  if (log_) {
-    log(log_indent_, "vsp = vsp + %d", 0x204 + result);
+  if (log_type_ != ARM_LOG_NONE) {
+    int32_t cfa_offset = 0x204 + result;
+    if (log_type_ == ARM_LOG_FULL) {
+      log(log_indent_, "vsp = vsp + %d", cfa_offset);
+    } else {
+      log_cfa_offset_ += cfa_offset;
+    }
+    AdjustRegisters(cfa_offset);
+
     if (log_skip_execution_) {
       return true;
     }
@@ -404,14 +477,20 @@
     return false;
   }
 
-  if (log_) {
+  if (log_type_ != ARM_LOG_NONE) {
     uint8_t start_reg = byte >> 4;
-    std::string msg = android::base::StringPrintf("pop {d%d", start_reg);
     uint8_t end_reg = start_reg + (byte & 0xf);
-    if (end_reg) {
-      msg += android::base::StringPrintf("-d%d", end_reg);
+
+    if (log_type_ == ARM_LOG_FULL) {
+      std::string msg = android::base::StringPrintf("pop {d%d", start_reg);
+      if (end_reg) {
+        msg += android::base::StringPrintf("-d%d", end_reg);
+      }
+      log(log_indent_, "%s}", msg.c_str());
+    } else {
+      log(log_indent_, "Unsupported DX register display");
     }
-    log(log_indent_, "%s}", msg.c_str());
+
     if (log_skip_execution_) {
       return true;
     }
@@ -422,7 +501,7 @@
 
 inline bool ArmExidx::DecodePrefix_10_11_01nn() {
   // 101101nn: Spare
-  if (log_) {
+  if (log_type_ != ARM_LOG_NONE) {
     log(log_indent_, "Spare");
   }
   status_ = ARM_STATUS_SPARE;
@@ -433,13 +512,18 @@
   CHECK((byte & ~0x07) == 0xb8);
 
   // 10111nnn: Pop VFP double-precision registers D[8]-D[8+nnn] by FSTMFDX
-  if (log_) {
-    std::string msg = "pop {d8";
-    uint8_t last_reg = (byte & 0x7);
-    if (last_reg) {
-      msg += android::base::StringPrintf("-d%d", last_reg + 8);
+  if (log_type_ != ARM_LOG_NONE) {
+    if (log_type_ == ARM_LOG_FULL) {
+      uint8_t last_reg = (byte & 0x7);
+      std::string msg = "pop {d8";
+      if (last_reg) {
+        msg += android::base::StringPrintf("-d%d", last_reg + 8);
+      }
+      log(log_indent_, "%s}", msg.c_str());
+    } else {
+      log(log_indent_, "Unsupported DX register display");
     }
-    log(log_indent_, "%s}", msg.c_str());
+
     if (log_skip_execution_) {
       return true;
     }
@@ -489,14 +573,19 @@
     }
 
     // 11000110 sssscccc: Intel Wireless MMX pop wR[ssss]-wR[ssss+cccc]
-    if (log_) {
-      uint8_t start_reg = byte >> 4;
-      std::string msg = android::base::StringPrintf("pop {wR%d", start_reg);
-      uint8_t end_reg = byte & 0xf;
-      if (end_reg) {
-        msg += android::base::StringPrintf("-wR%d", start_reg + end_reg);
+    if (log_type_ != ARM_LOG_NONE) {
+      if (log_type_ == ARM_LOG_FULL) {
+        uint8_t start_reg = byte >> 4;
+        std::string msg = android::base::StringPrintf("pop {wR%d", start_reg);
+        uint8_t end_reg = byte & 0xf;
+        if (end_reg) {
+          msg += android::base::StringPrintf("-wR%d", start_reg + end_reg);
+        }
+        log(log_indent_, "%s}", msg.c_str());
+      } else {
+        log(log_indent_, "Unsupported wRX register display");
       }
-      log(log_indent_, "%s}", msg.c_str());
+
       if (log_skip_execution_) {
         return true;
       }
@@ -510,32 +599,40 @@
 
     if (byte == 0) {
       // 11000111 00000000: Spare
-      if (log_) {
+      if (log_type_ != ARM_LOG_NONE) {
         log(log_indent_, "Spare");
       }
       status_ = ARM_STATUS_SPARE;
       return false;
     } else if ((byte >> 4) == 0) {
       // 11000111 0000iiii: Intel Wireless MMX pop wCGR registers {wCGR0,1,2,3}
-      if (log_) {
-        bool add_comma = false;
-        std::string msg = "pop {";
-        for (size_t i = 0; i < 4; i++) {
-          if (byte & (1 << i)) {
-            if (add_comma) {
-              msg += ", ";
+      if (log_type_ != ARM_LOG_NONE) {
+        if (log_type_ == ARM_LOG_FULL) {
+          bool add_comma = false;
+          std::string msg = "pop {";
+          for (size_t i = 0; i < 4; i++) {
+            if (byte & (1 << i)) {
+              if (add_comma) {
+                msg += ", ";
+              }
+              msg += android::base::StringPrintf("wCGR%zu", i);
+              add_comma = true;
             }
-            msg += android::base::StringPrintf("wCGR%zu", i);
-            add_comma = true;
           }
+          log(log_indent_, "%s}", msg.c_str());
+        } else {
+          log(log_indent_, "Unsupported wCGR register display");
         }
-        log(log_indent_, "%s}", msg.c_str());
+
+        if (log_skip_execution_) {
+          return true;
+        }
       }
       // Only update the cfa.
       cfa_ += __builtin_popcount(byte) * 4;
     } else {
       // 11000111 xxxxyyyy: Spare (xxxx != 0000)
-      if (log_) {
+      if (log_type_ != ARM_LOG_NONE) {
         log(log_indent_, "Spare");
       }
       status_ = ARM_STATUS_SPARE;
@@ -543,13 +640,18 @@
     }
   } else {
     // 11000nnn: Intel Wireless MMX pop wR[10]-wR[10+nnn] (nnn != 6, 7)
-    if (log_) {
-      std::string msg = "pop {wR10";
-      uint8_t nnn = byte & 0x7;
-      if (nnn) {
-        msg += android::base::StringPrintf("-wR%d", 10 + nnn);
+    if (log_type_ != ARM_LOG_NONE) {
+      if (log_type_ == ARM_LOG_FULL) {
+        std::string msg = "pop {wR10";
+        uint8_t nnn = byte & 0x7;
+        if (nnn) {
+          msg += android::base::StringPrintf("-wR%d", 10 + nnn);
+        }
+        log(log_indent_, "%s}", msg.c_str());
+      } else {
+        log(log_indent_, "Unsupported wRX register display");
       }
-      log(log_indent_, "%s}", msg.c_str());
+
       if (log_skip_execution_) {
         return true;
       }
@@ -570,14 +672,19 @@
       return false;
     }
 
-    if (log_) {
-      uint8_t start_reg = byte >> 4;
-      std::string msg = android::base::StringPrintf("pop {d%d", 16 + start_reg);
-      uint8_t end_reg = byte & 0xf;
-      if (end_reg) {
-        msg += android::base::StringPrintf("-d%d", 16 + start_reg + end_reg);
+    if (log_type_ != ARM_LOG_NONE) {
+      if (log_type_ == ARM_LOG_FULL) {
+        uint8_t start_reg = byte >> 4;
+        std::string msg = android::base::StringPrintf("pop {d%d", 16 + start_reg);
+        uint8_t end_reg = byte & 0xf;
+        if (end_reg) {
+          msg += android::base::StringPrintf("-d%d", 16 + start_reg + end_reg);
+        }
+        log(log_indent_, "%s}", msg.c_str());
+      } else {
+        log(log_indent_, "Unsupported DX register display");
       }
-      log(log_indent_, "%s}", msg.c_str());
+
       if (log_skip_execution_) {
         return true;
       }
@@ -590,14 +697,19 @@
       return false;
     }
 
-    if (log_) {
-      uint8_t start_reg = byte >> 4;
-      std::string msg = android::base::StringPrintf("pop {d%d", start_reg);
-      uint8_t end_reg = byte & 0xf;
-      if (end_reg) {
-        msg += android::base::StringPrintf("-d%d", start_reg + end_reg);
+    if (log_type_ != ARM_LOG_NONE) {
+      if (log_type_ == ARM_LOG_FULL) {
+        uint8_t start_reg = byte >> 4;
+        std::string msg = android::base::StringPrintf("pop {d%d", start_reg);
+        uint8_t end_reg = byte & 0xf;
+        if (end_reg) {
+          msg += android::base::StringPrintf("-d%d", start_reg + end_reg);
+        }
+        log(log_indent_, "%s}", msg.c_str());
+      } else {
+        log(log_indent_, "Unsupported DX register display");
       }
-      log(log_indent_, "%s}", msg.c_str());
+
       if (log_skip_execution_) {
         return true;
       }
@@ -606,7 +718,7 @@
     cfa_ += (byte & 0xf) * 8 + 8;
   } else {
     // 11001yyy: Spare (yyy != 000, 001)
-    if (log_) {
+    if (log_type_ != ARM_LOG_NONE) {
       log(log_indent_, "Spare");
     }
     status_ = ARM_STATUS_SPARE;
@@ -619,13 +731,18 @@
   CHECK((byte & ~0x07) == 0xd0);
 
   // 11010nnn: Pop VFP double precision registers D[8]-D[8+nnn] by VPUSH
-  if (log_) {
-    std::string msg = "pop {d8";
-    uint8_t end_reg = byte & 0x7;
-    if (end_reg) {
-      msg += android::base::StringPrintf("-d%d", 8 + end_reg);
+  if (log_type_ != ARM_LOG_NONE) {
+    if (log_type_ == ARM_LOG_FULL) {
+      std::string msg = "pop {d8";
+      uint8_t end_reg = byte & 0x7;
+      if (end_reg) {
+        msg += android::base::StringPrintf("-d%d", 8 + end_reg);
+      }
+      log(log_indent_, "%s}", msg.c_str());
+    } else {
+      log(log_indent_, "Unsupported DX register display");
     }
-    log(log_indent_, "%s}", msg.c_str());
+
     if (log_skip_execution_) {
       return true;
     }
@@ -646,7 +763,7 @@
     return DecodePrefix_11_010(byte);
   default:
     // 11xxxyyy: Spare (xxx != 000, 001, 010)
-    if (log_) {
+    if (log_type_ != ARM_LOG_NONE) {
       log(log_indent_, "Spare");
     }
     status_ = ARM_STATUS_SPARE;
@@ -664,8 +781,15 @@
   switch (byte >> 6) {
   case 0:
     // 00xxxxxx: vsp = vsp + (xxxxxxx << 2) + 4
-    if (log_) {
-      log(log_indent_, "vsp = vsp + %d", ((byte & 0x3f) << 2) + 4);
+    if (log_type_ != ARM_LOG_NONE) {
+      int32_t cfa_offset = ((byte & 0x3f) << 2) + 4;
+      if (log_type_ == ARM_LOG_FULL) {
+        log(log_indent_, "vsp = vsp + %d", cfa_offset);
+      } else {
+        log_cfa_offset_ += cfa_offset;
+      }
+      AdjustRegisters(cfa_offset);
+
       if (log_skip_execution_) {
         break;
       }
@@ -674,8 +798,15 @@
     break;
   case 1:
     // 01xxxxxx: vsp = vsp - (xxxxxxx << 2) + 4
-    if (log_) {
-      log(log_indent_, "vsp = vsp - %d", ((byte & 0x3f) << 2) + 4);
+    if (log_type_ != ARM_LOG_NONE) {
+      uint32_t cfa_offset = ((byte & 0x3f) << 2) + 4;
+      if (log_type_ == ARM_LOG_FULL) {
+        log(log_indent_, "vsp = vsp - %d", cfa_offset);
+      } else {
+        log_cfa_offset_ -= cfa_offset;
+      }
+      AdjustRegisters(-cfa_offset);
+
       if (log_skip_execution_) {
         break;
       }
@@ -696,4 +827,36 @@
   return status_ == ARM_STATUS_FINISH;
 }
 
+void ArmExidx::LogByReg() {
+  if (log_type_ != ARM_LOG_BY_REG) {
+    return;
+  }
+
+  uint8_t cfa_reg;
+  if (log_regs_.count(LOG_CFA_REG) == 0) {
+    cfa_reg = 13;
+  } else {
+    cfa_reg = log_regs_[LOG_CFA_REG];
+  }
+
+  if (log_cfa_offset_ != 0) {
+    char sign = (log_cfa_offset_ > 0) ? '+' : '-';
+    log(log_indent_, "cfa = r%zu %c %d", cfa_reg, sign, abs(log_cfa_offset_));
+  } else {
+    log(log_indent_, "cfa = r%zu", cfa_reg);
+  }
+
+  for (const auto& entry : log_regs_) {
+    if (entry.first >= LOG_CFA_REG) {
+      break;
+    }
+    if (entry.second == 0) {
+      log(log_indent_, "r%zu = [cfa]", entry.first);
+    } else {
+      char sign = (entry.second > 0) ? '-' : '+';
+      log(log_indent_, "r%zu = [cfa %c %d]", entry.first, sign, abs(entry.second));
+    }
+  }
+}
+
 }  // namespace unwindstack
diff --git a/libunwindstack/ArmExidx.h b/libunwindstack/ArmExidx.h
index 96756a0..d9fc371 100644
--- a/libunwindstack/ArmExidx.h
+++ b/libunwindstack/ArmExidx.h
@@ -20,6 +20,7 @@
 #include <stdint.h>
 
 #include <deque>
+#include <map>
 
 namespace unwindstack {
 
@@ -44,6 +45,12 @@
   ARM_OP_FINISH = 0xb0,
 };
 
+enum ArmLogType : uint8_t {
+  ARM_LOG_NONE,
+  ARM_LOG_FULL,
+  ARM_LOG_BY_REG,
+};
+
 class ArmExidx {
  public:
   ArmExidx(RegsArm* regs, Memory* elf_memory, Memory* process_memory)
@@ -52,6 +59,8 @@
 
   void LogRawData();
 
+  void LogByReg();
+
   bool ExtractEntryData(uint32_t entry_offset);
 
   bool Eval();
@@ -71,12 +80,13 @@
   bool pc_set() { return pc_set_; }
   void set_pc_set(bool pc_set) { pc_set_ = pc_set; }
 
-  void set_log(bool log) { log_ = log; }
+  void set_log(ArmLogType log_type) { log_type_ = log_type; }
   void set_log_skip_execution(bool skip_execution) { log_skip_execution_ = skip_execution; }
   void set_log_indent(uint8_t indent) { log_indent_ = indent; }
 
  private:
   bool GetByte(uint8_t* byte);
+  void AdjustRegisters(int32_t offset);
 
   bool DecodePrefix_10_00(uint8_t byte);
   bool DecodePrefix_10_01(uint8_t byte);
@@ -103,10 +113,12 @@
   Memory* elf_memory_;
   Memory* process_memory_;
 
-  bool log_ = false;
+  ArmLogType log_type_ = ARM_LOG_NONE;
   uint8_t log_indent_ = 0;
   bool log_skip_execution_ = false;
   bool pc_set_ = false;
+  int32_t log_cfa_offset_ = 0;
+  std::map<uint8_t, int32_t> log_regs_;
 };
 
 }  // namespace unwindstack
diff --git a/libunwindstack/DwarfCfa.cpp b/libunwindstack/DwarfCfa.cpp
index 6ecedce..cd9ef61 100644
--- a/libunwindstack/DwarfCfa.cpp
+++ b/libunwindstack/DwarfCfa.cpp
@@ -264,8 +264,8 @@
 }
 
 template <typename AddressType>
-bool DwarfCfa<AddressType>::Log(uint32_t indent, uint64_t pc, uint64_t load_bias,
-                                uint64_t start_offset, uint64_t end_offset) {
+bool DwarfCfa<AddressType>::Log(uint32_t indent, uint64_t pc, uint64_t start_offset,
+                                uint64_t end_offset) {
   memory_->set_cur_offset(start_offset);
   uint64_t cfa_offset;
   uint64_t cur_pc = fde_->pc_start;
@@ -301,8 +301,8 @@
         break;
     }
     if (cur_pc != old_pc) {
-      log(indent, "");
-      log(indent, "PC 0x%" PRIx64, cur_pc + load_bias);
+      log(0, "");
+      log(indent, "PC 0x%" PRIx64, cur_pc);
     }
     old_pc = cur_pc;
   }
diff --git a/libunwindstack/DwarfCfa.h b/libunwindstack/DwarfCfa.h
index 16c66e2..c5ffb8e 100644
--- a/libunwindstack/DwarfCfa.h
+++ b/libunwindstack/DwarfCfa.h
@@ -71,8 +71,7 @@
   bool GetLocationInfo(uint64_t pc, uint64_t start_offset, uint64_t end_offset,
                        dwarf_loc_regs_t* loc_regs);
 
-  bool Log(uint32_t indent, uint64_t pc, uint64_t load_bias, uint64_t start_offset,
-           uint64_t end_offset);
+  bool Log(uint32_t indent, uint64_t pc, uint64_t start_offset, uint64_t end_offset);
 
   const DwarfErrorData& last_error() { return last_error_; }
   DwarfErrorCode LastErrorCode() { return last_error_.code; }
diff --git a/libunwindstack/DwarfEhFrameWithHdr.cpp b/libunwindstack/DwarfEhFrameWithHdr.cpp
index 9a49013..fd6a457 100644
--- a/libunwindstack/DwarfEhFrameWithHdr.cpp
+++ b/libunwindstack/DwarfEhFrameWithHdr.cpp
@@ -22,12 +22,18 @@
 
 #include "Check.h"
 #include "DwarfEhFrameWithHdr.h"
+#include "DwarfEncoding.h"
 
 namespace unwindstack {
 
+static inline bool IsEncodingRelative(uint8_t encoding) {
+  encoding >>= 4;
+  return encoding > 0 && encoding <= DW_EH_PE_funcrel;
+}
+
 template <typename AddressType>
-bool DwarfEhFrameWithHdr<AddressType>::Init(uint64_t offset, uint64_t size) {
-  uint8_t data[4];
+bool DwarfEhFrameWithHdr<AddressType>::Init(uint64_t offset, uint64_t size, uint64_t load_bias) {
+  load_bias_ = load_bias;
 
   memory_.clear_func_offset();
   memory_.clear_text_offset();
@@ -35,6 +41,7 @@
   memory_.set_cur_offset(offset);
 
   // Read the first four bytes all at once.
+  uint8_t data[4];
   if (!memory_.ReadBytes(data, 4)) {
     last_error_.code = DWARF_ERROR_MEMORY_INVALID;
     last_error_.address = memory_.cur_offset();
@@ -100,7 +107,7 @@
 
   memory_.set_data_offset(entries_data_offset_);
   memory_.set_cur_offset(entries_offset_ + 2 * index * table_entry_size_);
-  memory_.set_pc_offset(memory_.cur_offset());
+  memory_.set_pc_offset(0);
   uint64_t value;
   if (!memory_.template ReadEncodedValue<AddressType>(table_encoding_, &value) ||
       !memory_.template ReadEncodedValue<AddressType>(table_encoding_, &info->offset)) {
@@ -109,6 +116,11 @@
     fde_info_.erase(index);
     return nullptr;
   }
+
+  // Relative encodings require adding in the load bias.
+  if (IsEncodingRelative(table_encoding_)) {
+    value += load_bias_;
+  }
   info->pc = value;
   return info;
 }
@@ -174,27 +186,27 @@
 
   memory_.set_data_offset(entries_data_offset_);
   memory_.set_cur_offset(cur_entries_offset_);
+  memory_.set_pc_offset(0);
   cur_entries_offset_ = 0;
 
   FdeInfo* prev_info = nullptr;
   for (size_t current = fde_info_.size();
        current < fde_count_ && memory_.cur_offset() < entries_end_; current++) {
-    memory_.set_pc_offset(memory_.cur_offset());
-    uint64_t value;
-    if (!memory_.template ReadEncodedValue<AddressType>(table_encoding_, &value)) {
-      last_error_.code = DWARF_ERROR_MEMORY_INVALID;
-      last_error_.address = memory_.cur_offset();
-      return false;
-    }
-
     FdeInfo* info = &fde_info_[current];
-    if (!memory_.template ReadEncodedValue<AddressType>(table_encoding_, &info->offset)) {
+    uint64_t value;
+    if (!memory_.template ReadEncodedValue<AddressType>(table_encoding_, &value) ||
+        !memory_.template ReadEncodedValue<AddressType>(table_encoding_, &info->offset)) {
       fde_info_.erase(current);
       last_error_.code = DWARF_ERROR_MEMORY_INVALID;
       last_error_.address = memory_.cur_offset();
       return false;
     }
-    info->pc = value + 4;
+
+    // Relative encodings require adding in the load bias.
+    if (IsEncodingRelative(table_encoding_)) {
+      value += load_bias_;
+    }
+    info->pc = value;
 
     if (pc < info->pc) {
       if (prev_info == nullptr) {
diff --git a/libunwindstack/DwarfEhFrameWithHdr.h b/libunwindstack/DwarfEhFrameWithHdr.h
index 3571166..d16dd10 100644
--- a/libunwindstack/DwarfEhFrameWithHdr.h
+++ b/libunwindstack/DwarfEhFrameWithHdr.h
@@ -38,6 +38,7 @@
   using DwarfSectionImpl<AddressType>::entries_offset_;
   using DwarfSectionImpl<AddressType>::entries_end_;
   using DwarfSectionImpl<AddressType>::last_error_;
+  using DwarfSectionImpl<AddressType>::load_bias_;
 
   struct FdeInfo {
     AddressType pc;
@@ -47,7 +48,7 @@
   DwarfEhFrameWithHdr(Memory* memory) : DwarfEhFrame<AddressType>(memory) {}
   virtual ~DwarfEhFrameWithHdr() = default;
 
-  bool Init(uint64_t offset, uint64_t size) override;
+  bool Init(uint64_t offset, uint64_t size, uint64_t load_bias) override;
 
   bool GetFdeOffsetFromPc(uint64_t pc, uint64_t* fde_offset) override;
 
diff --git a/libunwindstack/DwarfSection.cpp b/libunwindstack/DwarfSection.cpp
index 65eec65..eb83949 100644
--- a/libunwindstack/DwarfSection.cpp
+++ b/libunwindstack/DwarfSection.cpp
@@ -420,6 +420,7 @@
           last_error_.address = memory_.cur_offset();
           return false;
         }
+        memory_.set_pc_offset(pc_offset_);
         if (!memory_.ReadEncodedValue<AddressType>(encoding, &cie->personality_handler)) {
           last_error_.code = DWARF_ERROR_MEMORY_INVALID;
           last_error_.address = memory_.cur_offset();
@@ -521,19 +522,19 @@
   }
   memory_.set_cur_offset(cur_offset);
 
-  if (!memory_.ReadEncodedValue<AddressType>(cie->fde_address_encoding & 0xf, &fde->pc_start)) {
-    last_error_.code = DWARF_ERROR_MEMORY_INVALID;
-    last_error_.address = memory_.cur_offset();
-    return false;
-  }
+  // The load bias only applies to the start.
+  memory_.set_pc_offset(load_bias_);
+  bool valid = memory_.ReadEncodedValue<AddressType>(cie->fde_address_encoding, &fde->pc_start);
   fde->pc_start = AdjustPcFromFde(fde->pc_start);
 
-  if (!memory_.ReadEncodedValue<AddressType>(cie->fde_address_encoding & 0xf, &fde->pc_end)) {
+  memory_.set_pc_offset(0);
+  if (!valid || !memory_.ReadEncodedValue<AddressType>(cie->fde_address_encoding, &fde->pc_end)) {
     last_error_.code = DWARF_ERROR_MEMORY_INVALID;
     last_error_.address = memory_.cur_offset();
     return false;
   }
   fde->pc_end += fde->pc_start;
+
   if (cie->augmentation_string.size() > 0 && cie->augmentation_string[0] == 'z') {
     // Augmentation Size
     uint64_t aug_length;
@@ -544,6 +545,7 @@
     }
     uint64_t cur_offset = memory_.cur_offset();
 
+    memory_.set_pc_offset(pc_offset_);
     if (!memory_.ReadEncodedValue<AddressType>(cie->lsda_encoding, &fde->lsda_address)) {
       last_error_.code = DWARF_ERROR_MEMORY_INVALID;
       last_error_.address = memory_.cur_offset();
@@ -582,17 +584,16 @@
 }
 
 template <typename AddressType>
-bool DwarfSectionImpl<AddressType>::Log(uint8_t indent, uint64_t pc, uint64_t load_bias,
-                                        const DwarfFde* fde) {
+bool DwarfSectionImpl<AddressType>::Log(uint8_t indent, uint64_t pc, const DwarfFde* fde) {
   DwarfCfa<AddressType> cfa(&memory_, fde);
 
   // Always print the cie information.
   const DwarfCie* cie = fde->cie;
-  if (!cfa.Log(indent, pc, load_bias, cie->cfa_instructions_offset, cie->cfa_instructions_end)) {
+  if (!cfa.Log(indent, pc, cie->cfa_instructions_offset, cie->cfa_instructions_end)) {
     last_error_ = cfa.last_error();
     return false;
   }
-  if (!cfa.Log(indent, pc, load_bias, fde->cfa_instructions_offset, fde->cfa_instructions_end)) {
+  if (!cfa.Log(indent, pc, fde->cfa_instructions_offset, fde->cfa_instructions_end)) {
     last_error_ = cfa.last_error();
     return false;
   }
@@ -600,15 +601,16 @@
 }
 
 template <typename AddressType>
-bool DwarfSectionImpl<AddressType>::Init(uint64_t offset, uint64_t size) {
+bool DwarfSectionImpl<AddressType>::Init(uint64_t offset, uint64_t size, uint64_t load_bias) {
+  load_bias_ = load_bias;
   entries_offset_ = offset;
   entries_end_ = offset + size;
 
   memory_.clear_func_offset();
   memory_.clear_text_offset();
-  memory_.set_data_offset(offset);
   memory_.set_cur_offset(offset);
-  memory_.set_pc_offset(offset);
+  memory_.set_data_offset(offset);
+  pc_offset_ = offset;
 
   return CreateSortedFdeList();
 }
@@ -717,6 +719,7 @@
         return false;
       }
       uint64_t value;
+      memory_.set_pc_offset(pc_offset_);
       if (!memory_.template ReadEncodedValue<AddressType>(encoding, &value)) {
         last_error_.code = DWARF_ERROR_MEMORY_INVALID;
         last_error_.address = memory_.cur_offset();
@@ -737,15 +740,13 @@
   }
 
   uint64_t start;
-  if (!memory_.template ReadEncodedValue<AddressType>(encoding & 0xf, &start)) {
-    last_error_.code = DWARF_ERROR_MEMORY_INVALID;
-    last_error_.address = memory_.cur_offset();
-    return false;
-  }
+  memory_.set_pc_offset(load_bias_);
+  bool valid = memory_.template ReadEncodedValue<AddressType>(encoding, &start);
   start = AdjustPcFromFde(start);
 
   uint64_t length;
-  if (!memory_.template ReadEncodedValue<AddressType>(encoding & 0xf, &length)) {
+  memory_.set_pc_offset(0);
+  if (!valid || !memory_.template ReadEncodedValue<AddressType>(encoding, &length)) {
     last_error_.code = DWARF_ERROR_MEMORY_INVALID;
     last_error_.address = memory_.cur_offset();
     return false;
@@ -877,7 +878,7 @@
   while (first < last) {
     size_t current = (first + last) / 2;
     const FdeInfo* info = &fdes_[current];
-    if (pc >= info->start && pc <= info->end) {
+    if (pc >= info->start && pc < info->end) {
       *fde_offset = info->offset;
       return true;
     }
diff --git a/libunwindstack/Elf.cpp b/libunwindstack/Elf.cpp
index 3762107..4723606 100644
--- a/libunwindstack/Elf.cpp
+++ b/libunwindstack/Elf.cpp
@@ -53,7 +53,7 @@
 
   valid_ = interface_->Init(&load_bias_);
   if (valid_) {
-    interface_->InitHeaders();
+    interface_->InitHeaders(load_bias_);
     if (init_gnu_debugdata) {
       InitGnuDebugdata();
     } else {
@@ -83,7 +83,7 @@
   // is in the uncompressed data.
   uint64_t load_bias;
   if (gnu->Init(&load_bias)) {
-    gnu->InitHeaders();
+    gnu->InitHeaders(load_bias);
     interface_->SetGnuDebugdataInterface(gnu);
   } else {
     // Free all of the memory associated with the gnu_debugdata section.
@@ -103,9 +103,9 @@
 
 bool Elf::GetFunctionName(uint64_t addr, std::string* name, uint64_t* func_offset) {
   std::lock_guard<std::mutex> guard(lock_);
-  return valid_ && (interface_->GetFunctionName(addr, load_bias_, name, func_offset) ||
-                    (gnu_debugdata_interface_ && gnu_debugdata_interface_->GetFunctionName(
-                                                     addr, load_bias_, name, func_offset)));
+  return valid_ && (interface_->GetFunctionName(addr, name, func_offset) ||
+                    (gnu_debugdata_interface_ &&
+                     gnu_debugdata_interface_->GetFunctionName(addr, name, func_offset)));
 }
 
 bool Elf::GetGlobalVariable(const std::string& name, uint64_t* memory_address) {
@@ -174,7 +174,7 @@
 
   // Lock during the step which can update information in the object.
   std::lock_guard<std::mutex> guard(lock_);
-  return interface_->Step(adjusted_rel_pc, load_bias_, regs, process_memory, finished);
+  return interface_->Step(adjusted_rel_pc, regs, process_memory, finished);
 }
 
 bool Elf::IsValidElf(Memory* memory) {
@@ -220,7 +220,6 @@
   if (!valid_ || pc < load_bias_) {
     return false;
   }
-  pc -= load_bias_;
 
   if (interface_->IsValidPc(pc)) {
     return true;
diff --git a/libunwindstack/ElfInterface.cpp b/libunwindstack/ElfInterface.cpp
index 10afe33..954a821 100644
--- a/libunwindstack/ElfInterface.cpp
+++ b/libunwindstack/ElfInterface.cpp
@@ -87,8 +87,8 @@
 
   ISzAlloc alloc;
   CXzUnpacker state;
-  alloc.Alloc = [](void*, size_t size) { return malloc(size); };
-  alloc.Free = [](void*, void* ptr) { return free(ptr); };
+  alloc.Alloc = [](ISzAllocPtr, size_t size) { return malloc(size); };
+  alloc.Free = [](ISzAllocPtr, void* ptr) { return free(ptr); };
 
   XzUnpacker_Construct(&state, &alloc);
 
@@ -106,7 +106,7 @@
       dst_remaining += 2 * gnu_debugdata_size_;
     }
     return_val = XzUnpacker_Code(&state, dst->GetPtr(dst_offset), &dst_remaining, &src[src_offset],
-                                 &src_remaining, CODER_FINISH_ANY, &status);
+                                 &src_remaining, true, CODER_FINISH_ANY, &status);
     src_offset += src_remaining;
     dst_offset += dst_remaining;
   } while (return_val == SZ_OK && status == CODER_STATUS_NOT_FINISHED);
@@ -124,10 +124,10 @@
 }
 
 template <typename AddressType>
-void ElfInterface::InitHeadersWithTemplate() {
+void ElfInterface::InitHeadersWithTemplate(uint64_t load_bias) {
   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_)) {
+    if (!eh_frame_->Init(eh_frame_hdr_offset_, eh_frame_hdr_size_, load_bias)) {
       eh_frame_.reset(nullptr);
     }
   }
@@ -136,7 +136,7 @@
     // 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_)) {
+    if (!eh_frame_->Init(eh_frame_offset_, eh_frame_size_, load_bias)) {
       eh_frame_.reset(nullptr);
     }
   }
@@ -150,7 +150,7 @@
 
   if (debug_frame_offset_ != 0) {
     debug_frame_.reset(new DwarfDebugFrame<AddressType>(memory_));
-    if (!debug_frame_->Init(debug_frame_offset_, debug_frame_size_)) {
+    if (!debug_frame_->Init(debug_frame_offset_, debug_frame_size_, load_bias)) {
       debug_frame_.reset(nullptr);
       debug_frame_offset_ = 0;
       debug_frame_size_ = static_cast<uint64_t>(-1);
@@ -441,14 +441,14 @@
 }
 
 template <typename SymType>
-bool ElfInterface::GetFunctionNameWithTemplate(uint64_t addr, uint64_t load_bias, std::string* name,
+bool ElfInterface::GetFunctionNameWithTemplate(uint64_t addr, std::string* name,
                                                uint64_t* func_offset) {
   if (symbols_.empty()) {
     return false;
   }
 
   for (const auto symbol : symbols_) {
-    if (symbol->GetName<SymType>(addr, load_bias, memory_, name, func_offset)) {
+    if (symbol->GetName<SymType>(addr, memory_, name, func_offset)) {
       return true;
     }
   }
@@ -469,34 +469,25 @@
   return false;
 }
 
-bool ElfInterface::Step(uint64_t pc, uint64_t load_bias, Regs* regs, Memory* process_memory,
-                        bool* finished) {
+bool ElfInterface::Step(uint64_t pc, Regs* regs, Memory* process_memory, bool* finished) {
   last_error_.code = ERROR_NONE;
   last_error_.address = 0;
 
-  // Adjust the load bias to get the real relative pc.
-  if (pc < load_bias) {
-    last_error_.code = ERROR_UNWIND_INFO;
-    return false;
-  }
-  uint64_t adjusted_pc = pc - load_bias;
-
   // Try the debug_frame first since it contains the most specific unwind
   // information.
   DwarfSection* debug_frame = debug_frame_.get();
-  if (debug_frame != nullptr && debug_frame->Step(adjusted_pc, regs, process_memory, finished)) {
+  if (debug_frame != nullptr && debug_frame->Step(pc, regs, process_memory, finished)) {
     return true;
   }
 
   // Try the eh_frame next.
   DwarfSection* eh_frame = eh_frame_.get();
-  if (eh_frame != nullptr && eh_frame->Step(adjusted_pc, regs, process_memory, finished)) {
+  if (eh_frame != nullptr && eh_frame->Step(pc, regs, process_memory, finished)) {
     return true;
   }
 
-  // Finally try the gnu_debugdata interface, but always use a zero load bias.
   if (gnu_debugdata_interface_ != nullptr &&
-      gnu_debugdata_interface_->Step(pc, 0, regs, process_memory, finished)) {
+      gnu_debugdata_interface_->Step(pc, regs, process_memory, finished)) {
     return true;
   }
 
@@ -559,8 +550,8 @@
 }
 
 // Instantiate all of the needed template functions.
-template void ElfInterface::InitHeadersWithTemplate<uint32_t>();
-template void ElfInterface::InitHeadersWithTemplate<uint64_t>();
+template void ElfInterface::InitHeadersWithTemplate<uint32_t>(uint64_t);
+template void ElfInterface::InitHeadersWithTemplate<uint64_t>(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*);
@@ -574,9 +565,9 @@
 template bool ElfInterface::GetSonameWithTemplate<Elf32_Dyn>(std::string*);
 template bool ElfInterface::GetSonameWithTemplate<Elf64_Dyn>(std::string*);
 
-template bool ElfInterface::GetFunctionNameWithTemplate<Elf32_Sym>(uint64_t, uint64_t, std::string*,
+template bool ElfInterface::GetFunctionNameWithTemplate<Elf32_Sym>(uint64_t, std::string*,
                                                                    uint64_t*);
-template bool ElfInterface::GetFunctionNameWithTemplate<Elf64_Sym>(uint64_t, uint64_t, std::string*,
+template bool ElfInterface::GetFunctionNameWithTemplate<Elf64_Sym>(uint64_t, std::string*,
                                                                    uint64_t*);
 
 template bool ElfInterface::GetGlobalVariableWithTemplate<Elf32_Sym>(const std::string&, uint64_t*);
diff --git a/libunwindstack/ElfInterfaceArm.cpp b/libunwindstack/ElfInterfaceArm.cpp
index f93baeb..9b61599 100644
--- a/libunwindstack/ElfInterfaceArm.cpp
+++ b/libunwindstack/ElfInterfaceArm.cpp
@@ -26,6 +26,14 @@
 
 namespace unwindstack {
 
+bool ElfInterfaceArm::Init(uint64_t* load_bias) {
+  if (!ElfInterface32::Init(load_bias)) {
+    return false;
+  }
+  load_bias_ = *load_bias;
+  return true;
+}
+
 bool ElfInterfaceArm::FindEntry(uint32_t pc, uint64_t* entry_offset) {
   if (start_offset_ == 0 || total_entries_ == 0) {
     last_error_.code = ERROR_UNWIND_INFO;
@@ -96,24 +104,22 @@
   return true;
 }
 
-bool ElfInterfaceArm::Step(uint64_t pc, uint64_t load_bias, Regs* regs, Memory* process_memory,
-                           bool* finished) {
+bool ElfInterfaceArm::Step(uint64_t pc, Regs* regs, Memory* process_memory, bool* finished) {
   // Dwarf unwind information is precise about whether a pc is covered or not,
   // but arm unwind information only has ranges of pc. In order to avoid
   // incorrectly doing a bad unwind using arm unwind information for a
   // different function, always try and unwind with the dwarf information first.
-  return ElfInterface32::Step(pc, load_bias, regs, process_memory, finished) ||
-         StepExidx(pc, load_bias, regs, process_memory, finished);
+  return ElfInterface32::Step(pc, regs, process_memory, finished) ||
+         StepExidx(pc, regs, process_memory, finished);
 }
 
-bool ElfInterfaceArm::StepExidx(uint64_t pc, uint64_t load_bias, Regs* regs, Memory* process_memory,
-                                bool* finished) {
+bool ElfInterfaceArm::StepExidx(uint64_t pc, Regs* regs, Memory* process_memory, bool* finished) {
   // Adjust the load bias to get the real relative pc.
-  if (pc < load_bias) {
+  if (pc < load_bias_) {
     last_error_.code = ERROR_UNWIND_INFO;
     return false;
   }
-  pc -= load_bias;
+  pc -= load_bias_;
 
   RegsArm* regs_arm = reinterpret_cast<RegsArm*>(regs);
   uint64_t entry_offset;
@@ -167,13 +173,12 @@
   return return_value;
 }
 
-bool ElfInterfaceArm::GetFunctionName(uint64_t addr, uint64_t load_bias, std::string* name,
-                                      uint64_t* offset) {
+bool ElfInterfaceArm::GetFunctionName(uint64_t addr, std::string* name, uint64_t* offset) {
   // For ARM, thumb function symbols have bit 0 set, but the address passed
   // in here might not have this bit set and result in a failure to find
   // the thumb function names. Adjust the address and offset to account
   // for this possible case.
-  if (ElfInterface32::GetFunctionName(addr | 1, load_bias, name, offset)) {
+  if (ElfInterface32::GetFunctionName(addr | 1, name, offset)) {
     *offset &= ~1;
     return true;
   }
diff --git a/libunwindstack/ElfInterfaceArm.h b/libunwindstack/ElfInterfaceArm.h
index c1597ce..18efb6c 100644
--- a/libunwindstack/ElfInterfaceArm.h
+++ b/libunwindstack/ElfInterfaceArm.h
@@ -64,28 +64,30 @@
   iterator begin() { return iterator(this, 0); }
   iterator end() { return iterator(this, total_entries_); }
 
+  bool Init(uint64_t* load_bias) override;
+
   bool GetPrel31Addr(uint32_t offset, uint32_t* addr);
 
   bool FindEntry(uint32_t pc, uint64_t* entry_offset);
 
   bool HandleType(uint64_t offset, uint32_t type, uint64_t load_bias) override;
 
-  bool Step(uint64_t pc, uint64_t load_bias, Regs* regs, Memory* process_memory,
-            bool* finished) override;
+  bool Step(uint64_t pc, Regs* regs, Memory* process_memory, bool* finished) override;
 
-  bool StepExidx(uint64_t pc, uint64_t load_bias, Regs* regs, Memory* process_memory,
-                 bool* finished);
+  bool StepExidx(uint64_t pc, Regs* regs, Memory* process_memory, bool* finished);
 
-  bool GetFunctionName(uint64_t addr, uint64_t load_bias, std::string* name,
-                       uint64_t* offset) override;
+  bool GetFunctionName(uint64_t addr, std::string* name, uint64_t* offset) override;
 
   uint64_t start_offset() { return start_offset_; }
 
   size_t total_entries() { return total_entries_; }
 
+  void set_load_bias(uint64_t load_bias) { load_bias_ = load_bias; }
+
  protected:
   uint64_t start_offset_ = 0;
   size_t total_entries_ = 0;
+  uint64_t load_bias_ = 0;
 
   std::unordered_map<size_t, uint32_t> addrs_;
 };
diff --git a/libunwindstack/LocalUnwinder.cpp b/libunwindstack/LocalUnwinder.cpp
new file mode 100644
index 0000000..952b332
--- /dev/null
+++ b/libunwindstack/LocalUnwinder.cpp
@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <pthread.h>
+#include <stdint.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include <unwindstack/Elf.h>
+#include <unwindstack/LocalUnwinder.h>
+#include <unwindstack/MapInfo.h>
+#include <unwindstack/Maps.h>
+#include <unwindstack/Memory.h>
+#include <unwindstack/Regs.h>
+#include <unwindstack/RegsGetLocal.h>
+
+namespace unwindstack {
+
+bool LocalUnwinder::Init() {
+  pthread_rwlock_init(&maps_rwlock_, nullptr);
+
+  // Create the maps.
+  maps_.reset(new unwindstack::LocalUpdatableMaps());
+  if (!maps_->Parse()) {
+    maps_.reset();
+    return false;
+  }
+
+  process_memory_ = unwindstack::Memory::CreateProcessMemory(getpid());
+
+  return true;
+}
+
+bool LocalUnwinder::ShouldSkipLibrary(const std::string& map_name) {
+  for (const std::string& skip_library : skip_libraries_) {
+    if (skip_library == map_name) {
+      return true;
+    }
+  }
+  return false;
+}
+
+MapInfo* LocalUnwinder::GetMapInfo(uint64_t pc) {
+  pthread_rwlock_rdlock(&maps_rwlock_);
+  MapInfo* map_info = maps_->Find(pc);
+  pthread_rwlock_unlock(&maps_rwlock_);
+
+  if (map_info == nullptr) {
+    pthread_rwlock_wrlock(&maps_rwlock_);
+    // This is guaranteed not to invalidate any previous MapInfo objects so
+    // we don't need to worry about any MapInfo* values already in use.
+    if (maps_->Reparse()) {
+      map_info = maps_->Find(pc);
+    }
+    pthread_rwlock_unlock(&maps_rwlock_);
+  }
+
+  return map_info;
+}
+
+bool LocalUnwinder::Unwind(std::vector<LocalFrameData>* frame_info, size_t max_frames) {
+  std::unique_ptr<unwindstack::Regs> regs(unwindstack::Regs::CreateFromLocal());
+  unwindstack::RegsGetLocal(regs.get());
+
+  size_t num_frames = 0;
+  bool adjust_pc = false;
+  while (true) {
+    uint64_t cur_pc = regs->pc();
+    uint64_t cur_sp = regs->sp();
+
+    MapInfo* map_info = GetMapInfo(cur_pc);
+    if (map_info == nullptr) {
+      break;
+    }
+
+    Elf* elf = map_info->GetElf(process_memory_, true);
+    uint64_t rel_pc = elf->GetRelPc(cur_pc, map_info);
+    uint64_t step_pc = rel_pc;
+    uint64_t pc_adjustment;
+    if (adjust_pc) {
+      pc_adjustment = regs->GetPcAdjustment(rel_pc, elf);
+    } else {
+      pc_adjustment = 0;
+    }
+    step_pc -= pc_adjustment;
+    // Skip any locations that are within this library.
+    if (num_frames != 0 || !ShouldSkipLibrary(map_info->name)) {
+      // Add frame information.
+      std::string func_name;
+      uint64_t func_offset;
+      if (elf->GetFunctionName(rel_pc, &func_name, &func_offset)) {
+        frame_info->emplace_back(map_info, cur_pc - pc_adjustment, rel_pc - pc_adjustment,
+                                 func_name, func_offset);
+      } else {
+        frame_info->emplace_back(map_info, cur_pc - pc_adjustment, rel_pc - pc_adjustment, "", 0);
+      }
+      num_frames++;
+    }
+    if (!elf->valid()) {
+      break;
+    }
+    if (frame_info->size() == max_frames) {
+      break;
+    }
+
+    adjust_pc = true;
+    bool finished;
+    if (!elf->Step(rel_pc, step_pc, regs.get(), process_memory_.get(), &finished) || finished) {
+      break;
+    }
+    // pc and sp are the same, terminate the unwind.
+    if (cur_pc == regs->pc() && cur_sp == regs->sp()) {
+      break;
+    }
+  }
+  return num_frames != 0;
+}
+
+}  // namespace unwindstack
diff --git a/libunwindstack/Maps.cpp b/libunwindstack/Maps.cpp
index 4c16212..e676a5a 100644
--- a/libunwindstack/Maps.cpp
+++ b/libunwindstack/Maps.cpp
@@ -24,7 +24,9 @@
 #include <unistd.h>
 
 #include <android-base/unique_fd.h>
+#include <procinfo/process_map.h>
 
+#include <algorithm>
 #include <cctype>
 #include <memory>
 #include <string>
@@ -56,150 +58,16 @@
   return nullptr;
 }
 
-// Assumes that line does not end in '\n'.
-static MapInfo* InternalParseLine(const char* line) {
-  // Do not use a sscanf implementation since it is not performant.
-
-  // Example linux /proc/<pid>/maps lines:
-  // 6f000000-6f01e000 rwxp 00000000 00:0c 16389419   /system/lib/libcomposer.so
-  char* str;
-  const char* old_str = line;
-  uint64_t start = strtoull(old_str, &str, 16);
-  if (old_str == str || *str++ != '-') {
-    return nullptr;
-  }
-
-  old_str = str;
-  uint64_t end = strtoull(old_str, &str, 16);
-  if (old_str == str || !std::isspace(*str++)) {
-    return nullptr;
-  }
-
-  while (std::isspace(*str)) {
-    str++;
-  }
-
-  // Parse permissions data.
-  if (*str == '\0') {
-    return nullptr;
-  }
-  uint16_t flags = 0;
-  if (*str == 'r') {
-    flags |= PROT_READ;
-  } else if (*str != '-') {
-    return nullptr;
-  }
-  str++;
-  if (*str == 'w') {
-    flags |= PROT_WRITE;
-  } else if (*str != '-') {
-    return nullptr;
-  }
-  str++;
-  if (*str == 'x') {
-    flags |= PROT_EXEC;
-  } else if (*str != '-') {
-    return nullptr;
-  }
-  str++;
-  if (*str != 'p' && *str != 's') {
-    return nullptr;
-  }
-  str++;
-
-  if (!std::isspace(*str++)) {
-    return nullptr;
-  }
-
-  old_str = str;
-  uint64_t offset = strtoull(old_str, &str, 16);
-  if (old_str == str || !std::isspace(*str)) {
-    return nullptr;
-  }
-
-  // Ignore the 00:00 values.
-  old_str = str;
-  (void)strtoull(old_str, &str, 16);
-  if (old_str == str || *str++ != ':') {
-    return nullptr;
-  }
-  if (std::isspace(*str)) {
-    return nullptr;
-  }
-
-  // Skip the inode.
-  old_str = str;
-  (void)strtoull(str, &str, 16);
-  if (old_str == str || !std::isspace(*str++)) {
-    return nullptr;
-  }
-
-  // Skip decimal digit.
-  old_str = str;
-  (void)strtoull(old_str, &str, 10);
-  if (old_str == str || (!std::isspace(*str) && *str != '\0')) {
-    return nullptr;
-  }
-
-  while (std::isspace(*str)) {
-    str++;
-  }
-  if (*str == '\0') {
-    return new MapInfo(start, end, offset, flags, "");
-  }
-
-  // Save the name data.
-  std::string name(str);
-
-  // Mark a device map in /dev/ and not in /dev/ashmem/ specially.
-  if (name.substr(0, 5) == "/dev/" && name.substr(5, 7) != "ashmem/") {
-    flags |= MAPS_FLAGS_DEVICE_MAP;
-  }
-  return new MapInfo(start, end, offset, flags, name);
-}
-
 bool Maps::Parse() {
-  int fd = open(GetMapsFile().c_str(), O_RDONLY | O_CLOEXEC);
-  if (fd == -1) {
-    return false;
-  }
-
-  bool return_value = true;
-  char buffer[2048];
-  size_t leftover = 0;
-  while (true) {
-    ssize_t bytes = read(fd, &buffer[leftover], 2048 - leftover);
-    if (bytes == -1) {
-      return_value = false;
-      break;
-    }
-    if (bytes == 0) {
-      break;
-    }
-    bytes += leftover;
-    char* line = buffer;
-    while (bytes > 0) {
-      char* newline = static_cast<char*>(memchr(line, '\n', bytes));
-      if (newline == nullptr) {
-        memmove(buffer, line, bytes);
-        break;
-      }
-      *newline = '\0';
-
-      MapInfo* map_info = InternalParseLine(line);
-      if (map_info == nullptr) {
-        return_value = false;
-        break;
-      }
-      maps_.push_back(map_info);
-
-      bytes -= newline - line + 1;
-      line = newline + 1;
-    }
-    leftover = bytes;
-  }
-  close(fd);
-  return return_value;
+  return android::procinfo::ReadMapFile(
+      GetMapsFile(),
+      [&](uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, const char* name) {
+        // Mark a device map in /dev/ and not in /dev/ashmem/ specially.
+        if (strncmp(name, "/dev/", 5) == 0 && strncmp(name + 5, "ashmem/", 7) != 0) {
+          flags |= unwindstack::MAPS_FLAGS_DEVICE_MAP;
+        }
+        maps_.push_back(new MapInfo(start, end, pgoff, flags, name));
+      });
 }
 
 void Maps::Add(uint64_t start, uint64_t end, uint64_t offset, uint64_t flags,
@@ -209,6 +77,11 @@
   maps_.push_back(map_info);
 }
 
+void Maps::Sort() {
+  std::sort(maps_.begin(), maps_.end(),
+            [](const MapInfo* a, const MapInfo* b) { return a->start < b->start; });
+}
+
 Maps::~Maps() {
   for (auto& map : maps_) {
     delete map;
@@ -216,30 +89,99 @@
 }
 
 bool BufferMaps::Parse() {
-  const char* start_of_line = buffer_;
-  do {
-    std::string line;
-    const char* end_of_line = strchr(start_of_line, '\n');
-    if (end_of_line == nullptr) {
-      line = start_of_line;
-    } else {
-      line = std::string(start_of_line, end_of_line - start_of_line);
-      end_of_line++;
-    }
-
-    MapInfo* map_info = InternalParseLine(line.c_str());
-    if (map_info == nullptr) {
-      return false;
-    }
-    maps_.push_back(map_info);
-
-    start_of_line = end_of_line;
-  } while (start_of_line != nullptr && *start_of_line != '\0');
-  return true;
+  std::string content(buffer_);
+  return android::procinfo::ReadMapFileContent(
+      &content[0],
+      [&](uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, const char* name) {
+        // Mark a device map in /dev/ and not in /dev/ashmem/ specially.
+        if (strncmp(name, "/dev/", 5) == 0 && strncmp(name + 5, "ashmem/", 7) != 0) {
+          flags |= unwindstack::MAPS_FLAGS_DEVICE_MAP;
+        }
+        maps_.push_back(new MapInfo(start, end, pgoff, flags, name));
+      });
 }
 
 const std::string RemoteMaps::GetMapsFile() const {
   return "/proc/" + std::to_string(pid_) + "/maps";
 }
 
+const std::string LocalUpdatableMaps::GetMapsFile() const {
+  return "/proc/self/maps";
+}
+
+bool LocalUpdatableMaps::Reparse() {
+  // New maps will be added at the end without deleting the old ones.
+  size_t last_map_idx = maps_.size();
+  if (!Parse()) {
+    // Delete any maps added by the Parse call.
+    for (size_t i = last_map_idx; i < maps_.size(); i++) {
+      delete maps_[i];
+    }
+    maps_.resize(last_map_idx);
+    return false;
+  }
+
+  size_t total_entries = maps_.size();
+  size_t search_map_idx = 0;
+  for (size_t new_map_idx = last_map_idx; new_map_idx < maps_.size(); new_map_idx++) {
+    MapInfo* new_map_info = maps_[new_map_idx];
+    uint64_t start = new_map_info->start;
+    uint64_t end = new_map_info->end;
+    uint64_t flags = new_map_info->flags;
+    std::string* name = &new_map_info->name;
+    for (size_t old_map_idx = search_map_idx; old_map_idx < last_map_idx; old_map_idx++) {
+      MapInfo* info = maps_[old_map_idx];
+      if (start == info->start && end == info->end && flags == info->flags && *name == info->name) {
+        // No need to check
+        search_map_idx = old_map_idx + 1;
+        delete new_map_info;
+        maps_[new_map_idx] = nullptr;
+        total_entries--;
+        break;
+      } else if (info->start > start) {
+        // Stop, there isn't going to be a match.
+        search_map_idx = old_map_idx;
+        break;
+      }
+
+      // Never delete these maps, they may be in use. The assumption is
+      // that there will only every be a handfull of these so waiting
+      // to destroy them is not too expensive.
+      saved_maps_.push_back(info);
+      maps_[old_map_idx] = nullptr;
+      total_entries--;
+    }
+    if (search_map_idx >= last_map_idx) {
+      break;
+    }
+  }
+
+  // Now move out any of the maps that never were found.
+  for (size_t i = search_map_idx; i < last_map_idx; i++) {
+    saved_maps_.push_back(maps_[i]);
+    maps_[i] = nullptr;
+    total_entries--;
+  }
+
+  // Sort all of the values such that the nullptrs wind up at the end, then
+  // resize them away.
+  std::sort(maps_.begin(), maps_.end(), [](const auto* a, const auto* b) {
+    if (a == nullptr) {
+      return false;
+    } else if (b == nullptr) {
+      return true;
+    }
+    return a->start < b->start;
+  });
+  maps_.resize(total_entries);
+
+  return true;
+}
+
+LocalUpdatableMaps::~LocalUpdatableMaps() {
+  for (auto map_info : saved_maps_) {
+    delete map_info;
+  }
+}
+
 }  // namespace unwindstack
diff --git a/libunwindstack/Symbols.cpp b/libunwindstack/Symbols.cpp
index 25def40..14ebdbb 100644
--- a/libunwindstack/Symbols.cpp
+++ b/libunwindstack/Symbols.cpp
@@ -54,10 +54,7 @@
 }
 
 template <typename SymType>
-bool Symbols::GetName(uint64_t addr, uint64_t load_bias, Memory* elf_memory, std::string* name,
-                      uint64_t* func_offset) {
-  addr += load_bias;
-
+bool Symbols::GetName(uint64_t addr, Memory* elf_memory, std::string* name, uint64_t* func_offset) {
   if (symbols_.size() != 0) {
     const Info* info = GetInfoFromCache(addr);
     if (info) {
@@ -81,9 +78,6 @@
     if (entry.st_shndx != SHN_UNDEF && ELF32_ST_TYPE(entry.st_info) == STT_FUNC) {
       // Treat st_value as virtual address.
       uint64_t start_offset = entry.st_value;
-      if (entry.st_shndx != SHN_ABS) {
-        start_offset += load_bias;
-      }
       uint64_t end_offset = start_offset + entry.st_size;
 
       // Cache the value.
@@ -134,8 +128,8 @@
 }
 
 // Instantiate all of the needed template functions.
-template bool Symbols::GetName<Elf32_Sym>(uint64_t, uint64_t, Memory*, std::string*, uint64_t*);
-template bool Symbols::GetName<Elf64_Sym>(uint64_t, uint64_t, Memory*, std::string*, uint64_t*);
+template bool Symbols::GetName<Elf32_Sym>(uint64_t, Memory*, std::string*, uint64_t*);
+template bool Symbols::GetName<Elf64_Sym>(uint64_t, Memory*, std::string*, uint64_t*);
 
 template bool Symbols::GetGlobal<Elf32_Sym>(Memory*, const std::string&, uint64_t*);
 template bool Symbols::GetGlobal<Elf64_Sym>(Memory*, const std::string&, uint64_t*);
diff --git a/libunwindstack/Symbols.h b/libunwindstack/Symbols.h
index 7d239c1..7fcd067 100644
--- a/libunwindstack/Symbols.h
+++ b/libunwindstack/Symbols.h
@@ -44,8 +44,7 @@
   const Info* GetInfoFromCache(uint64_t addr);
 
   template <typename SymType>
-  bool GetName(uint64_t addr, uint64_t load_bias, Memory* elf_memory, std::string* name,
-               uint64_t* func_offset);
+  bool GetName(uint64_t addr, Memory* elf_memory, std::string* name, uint64_t* func_offset);
 
   template <typename SymType>
   bool GetGlobal(Memory* elf_memory, const std::string& name, uint64_t* memory_address);
diff --git a/libunwindstack/Unwinder.cpp b/libunwindstack/Unwinder.cpp
index 98ab30f..099cc9e 100644
--- a/libunwindstack/Unwinder.cpp
+++ b/libunwindstack/Unwinder.cpp
@@ -29,6 +29,7 @@
 #include <unwindstack/Elf.h>
 #include <unwindstack/JitDebug.h>
 #include <unwindstack/MapInfo.h>
+#include <unwindstack/Maps.h>
 #include <unwindstack/Unwinder.h>
 
 #if !defined(NO_LIBDEXFILE_SUPPORT)
@@ -61,7 +62,9 @@
     frame->map_offset = info->offset;
     frame->map_load_bias = info->load_bias;
     frame->map_flags = info->flags;
-    frame->map_name = info->name;
+    if (resolve_names_) {
+      frame->map_name = info->name;
+    }
     frame->rel_pc = dex_pc - info->start;
   } else {
     frame->rel_pc = dex_pc;
@@ -96,7 +99,9 @@
     return;
   }
 
-  frame->map_name = map_info->name;
+  if (resolve_names_) {
+    frame->map_name = map_info->name;
+  }
   frame->map_offset = map_info->offset;
   frame->map_start = map_info->start;
   frame->map_end = map_info->end;
@@ -138,26 +143,31 @@
     uint64_t cur_sp = regs_->sp();
 
     MapInfo* map_info = maps_->Find(regs_->pc());
-    uint64_t rel_pc;
     uint64_t pc_adjustment = 0;
     uint64_t step_pc;
+    uint64_t rel_pc;
     Elf* elf;
     if (map_info == nullptr) {
-      rel_pc = regs_->pc();
-      step_pc = rel_pc;
+      step_pc = regs_->pc();
+      rel_pc = step_pc;
       last_error_.code = ERROR_INVALID_MAP;
     } else {
       if (ShouldStop(map_suffixes_to_ignore, map_info->name)) {
         break;
       }
       elf = map_info->GetElf(process_memory_, true);
-      rel_pc = elf->GetRelPc(regs_->pc(), map_info);
+      step_pc = regs_->pc();
+      rel_pc = elf->GetRelPc(step_pc, map_info);
+      // Everyone except elf data in gdb jit debug maps uses the relative pc.
+      if (!(map_info->flags & MAPS_FLAGS_JIT_SYMFILE_MAP)) {
+        step_pc = rel_pc;
+      }
       if (adjust_pc) {
         pc_adjustment = regs_->GetPcAdjustment(rel_pc, elf);
       } else {
         pc_adjustment = 0;
       }
-      step_pc = rel_pc - pc_adjustment;
+      step_pc -= pc_adjustment;
 
       // If the pc is in an invalid elf file, try and get an Elf object
       // using the jit debug information.
diff --git a/libunwindstack/include/unwindstack/DwarfSection.h b/libunwindstack/include/unwindstack/DwarfSection.h
index 209c54a..847f382 100644
--- a/libunwindstack/include/unwindstack/DwarfSection.h
+++ b/libunwindstack/include/unwindstack/DwarfSection.h
@@ -78,13 +78,13 @@
   DwarfErrorCode LastErrorCode() { return last_error_.code; }
   uint64_t LastErrorAddress() { return last_error_.address; }
 
-  virtual bool Init(uint64_t offset, uint64_t size) = 0;
+  virtual bool Init(uint64_t offset, uint64_t size, uint64_t load_bias) = 0;
 
   virtual bool Eval(const DwarfCie*, Memory*, const dwarf_loc_regs_t&, Regs*, bool*) = 0;
 
   virtual bool GetFdeOffsetFromPc(uint64_t pc, uint64_t* fde_offset) = 0;
 
-  virtual bool Log(uint8_t indent, uint64_t pc, uint64_t load_bias, const DwarfFde* fde) = 0;
+  virtual bool Log(uint8_t indent, uint64_t pc, const DwarfFde* fde) = 0;
 
   virtual const DwarfFde* GetFdeFromIndex(size_t index) = 0;
 
@@ -131,7 +131,7 @@
   DwarfSectionImpl(Memory* memory) : DwarfSection(memory) {}
   virtual ~DwarfSectionImpl() = default;
 
-  bool Init(uint64_t offset, uint64_t size) override;
+  bool Init(uint64_t offset, uint64_t size, uint64_t load_bias) override;
 
   bool GetFdeOffsetFromPc(uint64_t pc, uint64_t* fde_offset) override;
 
@@ -150,7 +150,7 @@
 
   bool GetCfaLocationInfo(uint64_t pc, const DwarfFde* fde, dwarf_loc_regs_t* loc_regs) override;
 
-  bool Log(uint8_t indent, uint64_t pc, uint64_t load_bias, const DwarfFde* fde) override;
+  bool Log(uint8_t indent, uint64_t pc, const DwarfFde* fde) override;
 
  protected:
   bool EvalExpression(const DwarfLocation& loc, Memory* regular_memory, AddressType* value,
@@ -162,6 +162,9 @@
 
   bool CreateSortedFdeList();
 
+  uint64_t load_bias_ = 0;
+  uint64_t pc_offset_ = 0;
+
   std::vector<FdeInfo> fdes_;
   uint64_t entries_offset_;
   uint64_t entries_end_;
diff --git a/libunwindstack/include/unwindstack/ElfInterface.h b/libunwindstack/include/unwindstack/ElfInterface.h
index 3a221bc..4d25c40 100644
--- a/libunwindstack/include/unwindstack/ElfInterface.h
+++ b/libunwindstack/include/unwindstack/ElfInterface.h
@@ -54,17 +54,15 @@
 
   virtual bool Init(uint64_t* load_bias) = 0;
 
-  virtual void InitHeaders() = 0;
+  virtual void InitHeaders(uint64_t load_bias) = 0;
 
   virtual bool GetSoname(std::string* name) = 0;
 
-  virtual bool GetFunctionName(uint64_t addr, uint64_t load_bias, std::string* name,
-                               uint64_t* offset) = 0;
+  virtual bool GetFunctionName(uint64_t addr, std::string* name, uint64_t* offset) = 0;
 
   virtual bool GetGlobalVariable(const std::string& name, uint64_t* memory_address) = 0;
 
-  virtual bool Step(uint64_t rel_pc, uint64_t load_bias, Regs* regs, Memory* process_memory,
-                    bool* finished);
+  virtual bool Step(uint64_t rel_pc, Regs* regs, Memory* process_memory, bool* finished);
 
   virtual bool IsValidPc(uint64_t pc);
 
@@ -100,7 +98,7 @@
 
  protected:
   template <typename AddressType>
-  void InitHeadersWithTemplate();
+  void InitHeadersWithTemplate(uint64_t load_bias);
 
   template <typename EhdrType, typename PhdrType, typename ShdrType>
   bool ReadAllHeaders(uint64_t* load_bias);
@@ -115,8 +113,7 @@
   bool GetSonameWithTemplate(std::string* soname);
 
   template <typename SymType>
-  bool GetFunctionNameWithTemplate(uint64_t addr, uint64_t load_bias, std::string* name,
-                                   uint64_t* func_offset);
+  bool GetFunctionNameWithTemplate(uint64_t addr, std::string* name, uint64_t* func_offset);
 
   template <typename SymType>
   bool GetGlobalVariableWithTemplate(const std::string& name, uint64_t* memory_address);
@@ -169,15 +166,16 @@
     return ElfInterface::ReadAllHeaders<Elf32_Ehdr, Elf32_Phdr, Elf32_Shdr>(load_bias);
   }
 
-  void InitHeaders() override { ElfInterface::InitHeadersWithTemplate<uint32_t>(); }
+  void InitHeaders(uint64_t load_bias) override {
+    ElfInterface::InitHeadersWithTemplate<uint32_t>(load_bias);
+  }
 
   bool GetSoname(std::string* soname) override {
     return ElfInterface::GetSonameWithTemplate<Elf32_Dyn>(soname);
   }
 
-  bool GetFunctionName(uint64_t addr, uint64_t load_bias, std::string* name,
-                       uint64_t* func_offset) override {
-    return ElfInterface::GetFunctionNameWithTemplate<Elf32_Sym>(addr, load_bias, name, func_offset);
+  bool GetFunctionName(uint64_t addr, std::string* name, uint64_t* func_offset) override {
+    return ElfInterface::GetFunctionNameWithTemplate<Elf32_Sym>(addr, name, func_offset);
   }
 
   bool GetGlobalVariable(const std::string& name, uint64_t* memory_address) override {
@@ -198,15 +196,16 @@
     return ElfInterface::ReadAllHeaders<Elf64_Ehdr, Elf64_Phdr, Elf64_Shdr>(load_bias);
   }
 
-  void InitHeaders() override { ElfInterface::InitHeadersWithTemplate<uint64_t>(); }
+  void InitHeaders(uint64_t load_bias) override {
+    ElfInterface::InitHeadersWithTemplate<uint64_t>(load_bias);
+  }
 
   bool GetSoname(std::string* soname) override {
     return ElfInterface::GetSonameWithTemplate<Elf64_Dyn>(soname);
   }
 
-  bool GetFunctionName(uint64_t addr, uint64_t load_bias, std::string* name,
-                       uint64_t* func_offset) override {
-    return ElfInterface::GetFunctionNameWithTemplate<Elf64_Sym>(addr, load_bias, name, func_offset);
+  bool GetFunctionName(uint64_t addr, std::string* name, uint64_t* func_offset) override {
+    return ElfInterface::GetFunctionNameWithTemplate<Elf64_Sym>(addr, name, func_offset);
   }
 
   bool GetGlobalVariable(const std::string& name, uint64_t* memory_address) override {
diff --git a/libunwindstack/include/unwindstack/LocalUnwinder.h b/libunwindstack/include/unwindstack/LocalUnwinder.h
new file mode 100644
index 0000000..80bb53e
--- /dev/null
+++ b/libunwindstack/include/unwindstack/LocalUnwinder.h
@@ -0,0 +1,86 @@
+/*
+ * 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 _LIBUNWINDSTACK_LOCAL_UNWINDER_H
+#define _LIBUNWINDSTACK_LOCAL_UNWINDER_H
+
+#include <pthread.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include <unwindstack/Error.h>
+#include <unwindstack/Maps.h>
+#include <unwindstack/Memory.h>
+
+namespace unwindstack {
+
+// Forward declarations.
+class Elf;
+struct MapInfo;
+
+struct LocalFrameData {
+  LocalFrameData(MapInfo* map_info, uint64_t pc, uint64_t rel_pc, const std::string& function_name,
+                 uint64_t function_offset)
+      : map_info(map_info),
+        pc(pc),
+        rel_pc(rel_pc),
+        function_name(function_name),
+        function_offset(function_offset) {}
+
+  MapInfo* map_info;
+  uint64_t pc;
+  uint64_t rel_pc;
+  std::string function_name;
+  uint64_t function_offset;
+};
+
+// This is a specialized class that should only be used for doing local unwinds.
+// The Unwind call can be made as multiple times on the same object, and it can
+// be called by multiple threads at the same time.
+// It is designed to be used in debugging circumstances to get a stack trace
+// as fast as possible.
+class LocalUnwinder {
+ public:
+  LocalUnwinder() = default;
+  LocalUnwinder(const std::vector<std::string>& skip_libraries) : skip_libraries_(skip_libraries) {}
+  ~LocalUnwinder() = default;
+
+  bool Init();
+
+  bool Unwind(std::vector<LocalFrameData>* frame_info, size_t max_frames);
+
+  bool ShouldSkipLibrary(const std::string& map_name);
+
+  MapInfo* GetMapInfo(uint64_t pc);
+
+  ErrorCode LastErrorCode() { return last_error_.code; }
+  uint64_t LastErrorAddress() { return last_error_.address; }
+
+ private:
+  pthread_rwlock_t maps_rwlock_;
+  std::unique_ptr<LocalUpdatableMaps> maps_ = nullptr;
+  std::shared_ptr<Memory> process_memory_;
+  std::vector<std::string> skip_libraries_;
+  ErrorData last_error_;
+};
+
+}  // namespace unwindstack
+
+#endif  // _LIBUNWINDSTACK_LOCAL_UNWINDER_H
diff --git a/libunwindstack/include/unwindstack/MapInfo.h b/libunwindstack/include/unwindstack/MapInfo.h
index a57fe68..ac0df41 100644
--- a/libunwindstack/include/unwindstack/MapInfo.h
+++ b/libunwindstack/include/unwindstack/MapInfo.h
@@ -34,6 +34,13 @@
 struct MapInfo {
   MapInfo() = default;
   MapInfo(uint64_t start, uint64_t end) : start(start), end(end) {}
+  MapInfo(uint64_t start, uint64_t end, uint64_t offset, uint64_t flags, const char* name)
+      : start(start),
+        end(end),
+        offset(offset),
+        flags(flags),
+        name(name),
+        load_bias(static_cast<uint64_t>(-1)) {}
   MapInfo(uint64_t start, uint64_t end, uint64_t offset, uint64_t flags, const std::string& name)
       : start(start),
         end(end),
diff --git a/libunwindstack/include/unwindstack/Maps.h b/libunwindstack/include/unwindstack/Maps.h
index 17a2d28..67fbed2 100644
--- a/libunwindstack/include/unwindstack/Maps.h
+++ b/libunwindstack/include/unwindstack/Maps.h
@@ -30,6 +30,10 @@
 // Special flag to indicate a map is in /dev/. However, a map in
 // /dev/ashmem/... does not set this flag.
 static constexpr int MAPS_FLAGS_DEVICE_MAP = 0x8000;
+// Special flag to indicate that this map represents an elf file
+// created by ART for use with the gdb jit debug interface.
+// This should only ever appear in offline maps data.
+static constexpr int MAPS_FLAGS_JIT_SYMFILE_MAP = 0x4000;
 
 class Maps {
  public:
@@ -45,6 +49,8 @@
   void Add(uint64_t start, uint64_t end, uint64_t offset, uint64_t flags, const std::string& name,
            uint64_t load_bias);
 
+  void Sort();
+
   typedef std::vector<MapInfo*>::iterator iterator;
   iterator begin() { return maps_.begin(); }
   iterator end() { return maps_.end(); }
@@ -81,6 +87,19 @@
   virtual ~LocalMaps() = default;
 };
 
+class LocalUpdatableMaps : public Maps {
+ public:
+  LocalUpdatableMaps() : Maps() {}
+  virtual ~LocalUpdatableMaps();
+
+  bool Reparse();
+
+  const std::string GetMapsFile() const override;
+
+ private:
+  std::vector<MapInfo*> saved_maps_;
+};
+
 class BufferMaps : public Maps {
  public:
   BufferMaps(const char* buffer) : buffer_(buffer) {}
diff --git a/libunwindstack/tests/ArmExidxDecodeTest.cpp b/libunwindstack/tests/ArmExidxDecodeTest.cpp
index 8d6d00d..5f3d1ea 100644
--- a/libunwindstack/tests/ArmExidxDecodeTest.cpp
+++ b/libunwindstack/tests/ArmExidxDecodeTest.cpp
@@ -36,8 +36,6 @@
 class ArmExidxDecodeTest : public ::testing::TestWithParam<std::string> {
  protected:
   void Init(Memory* process_memory = nullptr) {
-    TearDown();
-
     if (process_memory == nullptr) {
       process_memory = &process_memory_;
     }
@@ -50,8 +48,8 @@
     regs_arm_->set_sp(0);
 
     exidx_.reset(new ArmExidx(regs_arm_.get(), &elf_memory_, process_memory));
-    if (log_) {
-      exidx_->set_log(true);
+    if (log_ != ARM_LOG_NONE) {
+      exidx_->set_log(log_);
       exidx_->set_log_indent(0);
       exidx_->set_log_skip_execution(false);
     }
@@ -60,14 +58,20 @@
   }
 
   void SetUp() override {
-    if (GetParam() != "no_logging") {
-      log_ = false;
+    if (GetParam() == "no_logging") {
+      log_ = ARM_LOG_NONE;
+    } else if (GetParam() == "register_logging") {
+      log_ = ARM_LOG_BY_REG;
     } else {
-      log_ = true;
+      log_ = ARM_LOG_FULL;
     }
-    ResetLogs();
     elf_memory_.Clear();
     process_memory_.Clear();
+    ResetExidx();
+  }
+
+  void ResetExidx() {
+    ResetLogs();
     Init();
   }
 
@@ -77,7 +81,7 @@
 
   MemoryFake elf_memory_;
   MemoryFake process_memory_;
-  bool log_;
+  ArmLogType log_;
 };
 
 TEST_P(ArmExidxDecodeTest, vsp_incr) {
@@ -86,38 +90,59 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind vsp = vsp + 4\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind vsp = vsp + 4\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ("4 unwind cfa = r13 + 4\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10004U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->clear();
   data_->push_back(0x01);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind vsp = vsp + 8\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind vsp = vsp + 8\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ("4 unwind cfa = r13 + 8\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x1000cU, exidx_->cfa());
+  ASSERT_EQ(0x10008U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->clear();
   data_->push_back(0x3f);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind vsp = vsp + 256\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind vsp = vsp + 256\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ("4 unwind cfa = r13 + 256\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x1010cU, exidx_->cfa());
+  ASSERT_EQ(0x10100U, exidx_->cfa());
 }
 
 TEST_P(ArmExidxDecodeTest, vsp_decr) {
@@ -126,38 +151,59 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind vsp = vsp - 4\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind vsp = vsp - 4\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ("4 unwind cfa = r13 - 4\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0xfffcU, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->clear();
   data_->push_back(0x41);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind vsp = vsp - 8\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind vsp = vsp - 8\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ("4 unwind cfa = r13 - 8\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0xfff4U, exidx_->cfa());
+  ASSERT_EQ(0xfff8U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->clear();
   data_->push_back(0x7f);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind vsp = vsp - 256\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind vsp = vsp - 256\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ("4 unwind cfa = r13 - 256\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0xfef4U, exidx_->cfa());
+  ASSERT_EQ(0xff00U, exidx_->cfa());
 }
 
 TEST_P(ArmExidxDecodeTest, refuse_unwind) {
@@ -166,10 +212,14 @@
   data_->push_back(0x00);
   ASSERT_FALSE(exidx_->Decode());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind Refuse to unwind\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Refuse to unwind\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(ARM_STATUS_NO_UNWIND, exidx_->status());
 }
@@ -182,29 +232,60 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_TRUE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {r15}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {r15}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 4\n"
+          "4 unwind r15 = [cfa - 4]\n",
+          GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10004U, exidx_->cfa());
   ASSERT_EQ(0x10U, (*exidx_->regs())[15]);
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0x8f);
   data_->push_back(0xff);
   for (size_t i = 0; i < 12; i++) {
-    process_memory_.SetData32(0x10004 + i * 4, i + 0x20);
+    process_memory_.SetData32(0x10000 + i * 4, i + 0x20);
   }
   exidx_->set_pc_set(false);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_TRUE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15}\n",
-              GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15}\n",
+                GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 48\n"
+          "4 unwind r4 = [cfa - 48]\n"
+          "4 unwind r5 = [cfa - 44]\n"
+          "4 unwind r6 = [cfa - 40]\n"
+          "4 unwind r7 = [cfa - 36]\n"
+          "4 unwind r8 = [cfa - 32]\n"
+          "4 unwind r9 = [cfa - 28]\n"
+          "4 unwind r10 = [cfa - 24]\n"
+          "4 unwind r11 = [cfa - 20]\n"
+          "4 unwind r12 = [cfa - 16]\n"
+          "4 unwind r13 = [cfa - 12]\n"
+          "4 unwind r14 = [cfa - 8]\n"
+          "4 unwind r15 = [cfa - 4]\n",
+          GetFakeLogPrint());
+      break;
   }
   // Popping r13 results in a modified cfa.
   ASSERT_EQ(0x29U, exidx_->cfa());
@@ -222,7 +303,7 @@
   ASSERT_EQ(0x2aU, (*exidx_->regs())[14]);
   ASSERT_EQ(0x2bU, (*exidx_->regs())[15]);
 
-  ResetLogs();
+  ResetExidx();
   exidx_->set_cfa(0x10034);
   data_->push_back(0x81);
   data_->push_back(0x28);
@@ -233,10 +314,22 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {r7, r9, r12}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {r7, r9, r12}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 12\n"
+          "4 unwind r7 = [cfa - 12]\n"
+          "4 unwind r9 = [cfa - 8]\n"
+          "4 unwind r12 = [cfa - 4]\n",
+          GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10040U, exidx_->cfa());
   ASSERT_EQ(0x11U, (*exidx_->regs())[7]);
@@ -255,34 +348,63 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind vsp = r0\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind vsp = r0\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ("4 unwind cfa = r0\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(1U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
+  exidx_->set_cfa(0x100);
+  for (size_t i = 0; i < 15; i++) {
+    (*regs_arm_)[i] = i + 1;
+  }
   data_->push_back(0x93);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind vsp = r3\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind vsp = r3\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ("4 unwind cfa = r3\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(4U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
+  exidx_->set_cfa(0x100);
+  for (size_t i = 0; i < 15; i++) {
+    (*regs_arm_)[i] = i + 1;
+  }
   data_->push_back(0x9e);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind vsp = r14\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind vsp = r14\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ("4 unwind cfa = r14\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(15U, exidx_->cfa());
 }
@@ -292,22 +414,30 @@
   data_->push_back(0x9d);
   ASSERT_FALSE(exidx_->Decode());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind [Reserved]\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind [Reserved]\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(ARM_STATUS_RESERVED, exidx_->status());
 
   // 10011111: Reserved as prefix for Intel Wireless MMX register to register moves
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0x9f);
   ASSERT_FALSE(exidx_->Decode());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind [Reserved]\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind [Reserved]\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(ARM_STATUS_RESERVED, exidx_->status());
 }
@@ -319,53 +449,93 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {r4}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {r4}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 4\n"
+          "4 unwind r4 = [cfa - 4]\n",
+          GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10004U, exidx_->cfa());
   ASSERT_EQ(0x14U, (*exidx_->regs())[4]);
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xa3);
-  process_memory_.SetData32(0x10004, 0x20);
-  process_memory_.SetData32(0x10008, 0x30);
-  process_memory_.SetData32(0x1000c, 0x40);
-  process_memory_.SetData32(0x10010, 0x50);
+  process_memory_.SetData32(0x10000, 0x20);
+  process_memory_.SetData32(0x10004, 0x30);
+  process_memory_.SetData32(0x10008, 0x40);
+  process_memory_.SetData32(0x1000c, 0x50);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {r4-r7}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {r4-r7}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 16\n"
+          "4 unwind r4 = [cfa - 16]\n"
+          "4 unwind r5 = [cfa - 12]\n"
+          "4 unwind r6 = [cfa - 8]\n"
+          "4 unwind r7 = [cfa - 4]\n",
+          GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x10014U, exidx_->cfa());
+  ASSERT_EQ(0x10010U, exidx_->cfa());
   ASSERT_EQ(0x20U, (*exidx_->regs())[4]);
   ASSERT_EQ(0x30U, (*exidx_->regs())[5]);
   ASSERT_EQ(0x40U, (*exidx_->regs())[6]);
   ASSERT_EQ(0x50U, (*exidx_->regs())[7]);
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xa7);
-  process_memory_.SetData32(0x10014, 0x41);
-  process_memory_.SetData32(0x10018, 0x51);
-  process_memory_.SetData32(0x1001c, 0x61);
-  process_memory_.SetData32(0x10020, 0x71);
-  process_memory_.SetData32(0x10024, 0x81);
-  process_memory_.SetData32(0x10028, 0x91);
-  process_memory_.SetData32(0x1002c, 0xa1);
-  process_memory_.SetData32(0x10030, 0xb1);
+  process_memory_.SetData32(0x10000, 0x41);
+  process_memory_.SetData32(0x10004, 0x51);
+  process_memory_.SetData32(0x10008, 0x61);
+  process_memory_.SetData32(0x1000c, 0x71);
+  process_memory_.SetData32(0x10010, 0x81);
+  process_memory_.SetData32(0x10014, 0x91);
+  process_memory_.SetData32(0x10018, 0xa1);
+  process_memory_.SetData32(0x1001c, 0xb1);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {r4-r11}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {r4-r11}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 32\n"
+          "4 unwind r4 = [cfa - 32]\n"
+          "4 unwind r5 = [cfa - 28]\n"
+          "4 unwind r6 = [cfa - 24]\n"
+          "4 unwind r7 = [cfa - 20]\n"
+          "4 unwind r8 = [cfa - 16]\n"
+          "4 unwind r9 = [cfa - 12]\n"
+          "4 unwind r10 = [cfa - 8]\n"
+          "4 unwind r11 = [cfa - 4]\n",
+          GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x10034U, exidx_->cfa());
+  ASSERT_EQ(0x10020U, exidx_->cfa());
   ASSERT_EQ(0x41U, (*exidx_->regs())[4]);
   ASSERT_EQ(0x51U, (*exidx_->regs())[5]);
   ASSERT_EQ(0x61U, (*exidx_->regs())[6]);
@@ -384,57 +554,100 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {r4, r14}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {r4, r14}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 8\n"
+          "4 unwind r4 = [cfa - 8]\n"
+          "4 unwind r14 = [cfa - 4]\n",
+          GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10008U, exidx_->cfa());
   ASSERT_EQ(0x12U, (*exidx_->regs())[4]);
   ASSERT_EQ(0x22U, (*exidx_->regs())[14]);
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xab);
-  process_memory_.SetData32(0x10008, 0x1);
-  process_memory_.SetData32(0x1000c, 0x2);
-  process_memory_.SetData32(0x10010, 0x3);
-  process_memory_.SetData32(0x10014, 0x4);
-  process_memory_.SetData32(0x10018, 0x5);
+  process_memory_.SetData32(0x10000, 0x1);
+  process_memory_.SetData32(0x10004, 0x2);
+  process_memory_.SetData32(0x10008, 0x3);
+  process_memory_.SetData32(0x1000c, 0x4);
+  process_memory_.SetData32(0x10010, 0x5);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {r4-r7, r14}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {r4-r7, r14}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 20\n"
+          "4 unwind r4 = [cfa - 20]\n"
+          "4 unwind r5 = [cfa - 16]\n"
+          "4 unwind r6 = [cfa - 12]\n"
+          "4 unwind r7 = [cfa - 8]\n"
+          "4 unwind r14 = [cfa - 4]\n",
+          GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x1001cU, exidx_->cfa());
+  ASSERT_EQ(0x10014U, exidx_->cfa());
   ASSERT_EQ(0x1U, (*exidx_->regs())[4]);
   ASSERT_EQ(0x2U, (*exidx_->regs())[5]);
   ASSERT_EQ(0x3U, (*exidx_->regs())[6]);
   ASSERT_EQ(0x4U, (*exidx_->regs())[7]);
   ASSERT_EQ(0x5U, (*exidx_->regs())[14]);
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xaf);
-  process_memory_.SetData32(0x1001c, 0x1a);
-  process_memory_.SetData32(0x10020, 0x2a);
-  process_memory_.SetData32(0x10024, 0x3a);
-  process_memory_.SetData32(0x10028, 0x4a);
-  process_memory_.SetData32(0x1002c, 0x5a);
-  process_memory_.SetData32(0x10030, 0x6a);
-  process_memory_.SetData32(0x10034, 0x7a);
-  process_memory_.SetData32(0x10038, 0x8a);
-  process_memory_.SetData32(0x1003c, 0x9a);
+  process_memory_.SetData32(0x10000, 0x1a);
+  process_memory_.SetData32(0x10004, 0x2a);
+  process_memory_.SetData32(0x10008, 0x3a);
+  process_memory_.SetData32(0x1000c, 0x4a);
+  process_memory_.SetData32(0x10010, 0x5a);
+  process_memory_.SetData32(0x10014, 0x6a);
+  process_memory_.SetData32(0x10018, 0x7a);
+  process_memory_.SetData32(0x1001c, 0x8a);
+  process_memory_.SetData32(0x10020, 0x9a);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {r4-r11, r14}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {r4-r11, r14}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 36\n"
+          "4 unwind r4 = [cfa - 36]\n"
+          "4 unwind r5 = [cfa - 32]\n"
+          "4 unwind r6 = [cfa - 28]\n"
+          "4 unwind r7 = [cfa - 24]\n"
+          "4 unwind r8 = [cfa - 20]\n"
+          "4 unwind r9 = [cfa - 16]\n"
+          "4 unwind r10 = [cfa - 12]\n"
+          "4 unwind r11 = [cfa - 8]\n"
+          "4 unwind r14 = [cfa - 4]\n",
+          GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x10040U, exidx_->cfa());
+  ASSERT_EQ(0x10024U, exidx_->cfa());
   ASSERT_EQ(0x1aU, (*exidx_->regs())[4]);
   ASSERT_EQ(0x2aU, (*exidx_->regs())[5]);
   ASSERT_EQ(0x3aU, (*exidx_->regs())[6]);
@@ -451,10 +664,17 @@
   data_->push_back(0xb0);
   ASSERT_FALSE(exidx_->Decode());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind finish\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind finish\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ("4 unwind cfa = r13\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10000U, exidx_->cfa());
   ASSERT_EQ(ARM_STATUS_FINISH, exidx_->status());
@@ -466,10 +686,14 @@
   data_->push_back(0x00);
   ASSERT_FALSE(exidx_->Decode());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind Spare\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Spare\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10000U, exidx_->cfa());
   ASSERT_EQ(ARM_STATUS_SPARE, exidx_->status());
@@ -477,15 +701,19 @@
   // 10110001 xxxxyyyy: Spare (xxxx != 0000)
   for (size_t x = 1; x < 16; x++) {
     for (size_t y = 0; y < 16; y++) {
-      ResetLogs();
+      ResetExidx();
       data_->push_back(0xb1);
       data_->push_back((x << 4) | y);
       ASSERT_FALSE(exidx_->Decode()) << "x, y = " << x << ", " << y;
       ASSERT_EQ("", GetFakeLogBuf()) << "x, y = " << x << ", " << y;
-      if (log_) {
-        ASSERT_EQ("4 unwind Spare\n", GetFakeLogPrint()) << "x, y = " << x << ", " << y;
-      } else {
-        ASSERT_EQ("", GetFakeLogPrint());
+      switch (log_) {
+        case ARM_LOG_NONE:
+          ASSERT_EQ("", GetFakeLogPrint());
+          break;
+        case ARM_LOG_FULL:
+        case ARM_LOG_BY_REG:
+          ASSERT_EQ("4 unwind Spare\n", GetFakeLogPrint()) << "x, y = " << x << ", " << y;
+          break;
       }
       ASSERT_EQ(0x10000U, exidx_->cfa()) << "x, y = " << x << ", " << y;
       ASSERT_EQ(ARM_STATUS_SPARE, exidx_->status());
@@ -494,29 +722,37 @@
 
   // 101101nn: Spare
   for (size_t n = 0; n < 4; n++) {
-    ResetLogs();
+    ResetExidx();
     data_->push_back(0xb4 | n);
     ASSERT_FALSE(exidx_->Decode()) << "n = " << n;
     ASSERT_EQ("", GetFakeLogBuf()) << "n = " << n;
-    if (log_) {
-      ASSERT_EQ("4 unwind Spare\n", GetFakeLogPrint()) << "n = " << n;
-    } else {
-      ASSERT_EQ("", GetFakeLogPrint());
+    switch (log_) {
+      case ARM_LOG_NONE:
+        ASSERT_EQ("", GetFakeLogPrint());
+        break;
+      case ARM_LOG_FULL:
+      case ARM_LOG_BY_REG:
+        ASSERT_EQ("4 unwind Spare\n", GetFakeLogPrint()) << "n = " << n;
+        break;
     }
     ASSERT_EQ(0x10000U, exidx_->cfa()) << "n = " << n;
     ASSERT_EQ(ARM_STATUS_SPARE, exidx_->status());
   }
 
   // 11000111 00000000: Spare
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xc7);
   data_->push_back(0x00);
   ASSERT_FALSE(exidx_->Decode());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind Spare\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Spare\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10000U, exidx_->cfa());
   ASSERT_EQ(ARM_STATUS_SPARE, exidx_->status());
@@ -524,15 +760,19 @@
   // 11000111 xxxxyyyy: Spare (xxxx != 0000)
   for (size_t x = 1; x < 16; x++) {
     for (size_t y = 0; y < 16; y++) {
-      ResetLogs();
+      ResetExidx();
       data_->push_back(0xc7);
       data_->push_back(0x10);
       ASSERT_FALSE(exidx_->Decode()) << "x, y = " << x << ", " << y;
       ASSERT_EQ("", GetFakeLogBuf()) << "x, y = " << x << ", " << y;
-      if (log_) {
-        ASSERT_EQ("4 unwind Spare\n", GetFakeLogPrint()) << "x, y = " << x << ", " << y;
-      } else {
-        ASSERT_EQ("", GetFakeLogPrint());
+      switch (log_) {
+        case ARM_LOG_NONE:
+          ASSERT_EQ("", GetFakeLogPrint());
+          break;
+        case ARM_LOG_FULL:
+        case ARM_LOG_BY_REG:
+          ASSERT_EQ("4 unwind Spare\n", GetFakeLogPrint()) << "x, y = " << x << ", " << y;
+          break;
       }
       ASSERT_EQ(0x10000U, exidx_->cfa()) << "x, y = " << x << ", " << y;
       ASSERT_EQ(ARM_STATUS_SPARE, exidx_->status());
@@ -541,14 +781,18 @@
 
   // 11001yyy: Spare (yyy != 000, 001)
   for (size_t y = 2; y < 8; y++) {
-    ResetLogs();
+    ResetExidx();
     data_->push_back(0xc8 | y);
     ASSERT_FALSE(exidx_->Decode()) << "y = " << y;
     ASSERT_EQ("", GetFakeLogBuf()) << "y = " << y;
-    if (log_) {
-      ASSERT_EQ("4 unwind Spare\n", GetFakeLogPrint()) << "y = " << y;
-    } else {
-      ASSERT_EQ("", GetFakeLogPrint());
+    switch (log_) {
+      case ARM_LOG_NONE:
+        ASSERT_EQ("", GetFakeLogPrint());
+        break;
+      case ARM_LOG_FULL:
+      case ARM_LOG_BY_REG:
+        ASSERT_EQ("4 unwind Spare\n", GetFakeLogPrint()) << "y = " << y;
+        break;
     }
     ASSERT_EQ(0x10000U, exidx_->cfa()) << "y = " << y;
     ASSERT_EQ(ARM_STATUS_SPARE, exidx_->status());
@@ -557,14 +801,18 @@
   // 11xxxyyy: Spare (xxx != 000, 001, 010)
   for (size_t x = 3; x < 8; x++) {
     for (size_t y = 0; y < 8; y++) {
-      ResetLogs();
+      ResetExidx();
       data_->push_back(0xc0 | (x << 3) | y);
       ASSERT_FALSE(exidx_->Decode()) << "x, y = " << x << ", " << y;
       ASSERT_EQ("", GetFakeLogBuf()) << "x, y = " << x << ", " << y;
-      if (log_) {
-        ASSERT_EQ("4 unwind Spare\n", GetFakeLogPrint()) << "x, y = " << x << ", " << y;
-      } else {
-        ASSERT_EQ("", GetFakeLogPrint());
+      switch (log_) {
+        case ARM_LOG_NONE:
+          ASSERT_EQ("", GetFakeLogPrint());
+          break;
+        case ARM_LOG_FULL:
+        case ARM_LOG_BY_REG:
+          ASSERT_EQ("4 unwind Spare\n", GetFakeLogPrint()) << "x, y = " << x << ", " << y;
+          break;
       }
       ASSERT_EQ(0x10000U, exidx_->cfa()) << "x, y = " << x << ", " << y;
       ASSERT_EQ(ARM_STATUS_SPARE, exidx_->status());
@@ -580,47 +828,81 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {r0}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {r0}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 4\n"
+          "4 unwind r0 = [cfa - 4]\n",
+          GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10004U, exidx_->cfa());
   ASSERT_EQ(0x45U, (*exidx_->regs())[0]);
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xb1);
   data_->push_back(0x0a);
-  process_memory_.SetData32(0x10004, 0x23);
-  process_memory_.SetData32(0x10008, 0x24);
+  process_memory_.SetData32(0x10000, 0x23);
+  process_memory_.SetData32(0x10004, 0x24);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {r1, r3}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {r1, r3}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 8\n"
+          "4 unwind r1 = [cfa - 8]\n"
+          "4 unwind r3 = [cfa - 4]\n",
+          GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x1000cU, exidx_->cfa());
+  ASSERT_EQ(0x10008U, exidx_->cfa());
   ASSERT_EQ(0x23U, (*exidx_->regs())[1]);
   ASSERT_EQ(0x24U, (*exidx_->regs())[3]);
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xb1);
   data_->push_back(0x0f);
-  process_memory_.SetData32(0x1000c, 0x65);
-  process_memory_.SetData32(0x10010, 0x54);
-  process_memory_.SetData32(0x10014, 0x43);
-  process_memory_.SetData32(0x10018, 0x32);
+  process_memory_.SetData32(0x10000, 0x65);
+  process_memory_.SetData32(0x10004, 0x54);
+  process_memory_.SetData32(0x10008, 0x43);
+  process_memory_.SetData32(0x1000c, 0x32);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {r0, r1, r2, r3}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {r0, r1, r2, r3}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 16\n"
+          "4 unwind r0 = [cfa - 16]\n"
+          "4 unwind r1 = [cfa - 12]\n"
+          "4 unwind r2 = [cfa - 8]\n"
+          "4 unwind r3 = [cfa - 4]\n",
+          GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x1001cU, exidx_->cfa());
+  ASSERT_EQ(0x10010U, exidx_->cfa());
   ASSERT_EQ(0x65U, (*exidx_->regs())[0]);
   ASSERT_EQ(0x54U, (*exidx_->regs())[1]);
   ASSERT_EQ(0x43U, (*exidx_->regs())[2]);
@@ -634,28 +916,42 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind vsp = vsp + 1024\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind vsp = vsp + 1024\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ("4 unwind cfa = r13 + 1024\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10400U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xb2);
   data_->push_back(0xff);
   data_->push_back(0x02);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind vsp = vsp + 2048\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind vsp = vsp + 2048\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ("4 unwind cfa = r13 + 2048\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x10c00U, exidx_->cfa());
+  ASSERT_EQ(0x10800U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xb2);
   data_->push_back(0xff);
   data_->push_back(0x82);
@@ -663,12 +959,19 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind vsp = vsp + 3147776\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind vsp = vsp + 3147776\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ("4 unwind cfa = r13 + 3147776\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x311400U, exidx_->cfa());
+  ASSERT_EQ(0x310800U, exidx_->cfa());
 }
 
 TEST_P(ArmExidxDecodeTest, pop_vfp_fstmfdx) {
@@ -678,25 +981,37 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {d0}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {d0}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported DX register display\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x1000cU, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xb3);
   data_->push_back(0x48);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {d4-d12}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {d4-d12}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported DX register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x10058U, exidx_->cfa());
+  ASSERT_EQ(0x1004cU, exidx_->cfa());
 }
 
 TEST_P(ArmExidxDecodeTest, pop_vfp8_fstmfdx) {
@@ -705,36 +1020,54 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {d8}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {d8}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported DX register display\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x1000cU, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xbb);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {d8-d11}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {d8-d11}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported DX register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x10030U, exidx_->cfa());
+  ASSERT_EQ(0x10024U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xbf);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {d8-d15}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {d8-d15}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported DX register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x10074U, exidx_->cfa());
+  ASSERT_EQ(0x10044U, exidx_->cfa());
 }
 
 TEST_P(ArmExidxDecodeTest, pop_mmx_wr10) {
@@ -743,36 +1076,54 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {wR10}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {wR10}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported wRX register display\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10008U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xc2);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {wR10-wR12}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {wR10-wR12}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported wRX register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x10020U, exidx_->cfa());
+  ASSERT_EQ(0x10018U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xc5);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {wR10-wR15}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {wR10-wR15}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported wRX register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x10050U, exidx_->cfa());
+  ASSERT_EQ(0x10030U, exidx_->cfa());
 }
 
 TEST_P(ArmExidxDecodeTest, pop_mmx_wr) {
@@ -782,38 +1133,56 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {wR0}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {wR0}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported wRX register display\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10008U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xc6);
   data_->push_back(0x25);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {wR2-wR7}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {wR2-wR7}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported wRX register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x10038U, exidx_->cfa());
+  ASSERT_EQ(0x10030U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xc6);
   data_->push_back(0xff);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {wR15-wR30}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {wR15-wR30}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported wRX register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x100b8U, exidx_->cfa());
+  ASSERT_EQ(0x10080U, exidx_->cfa());
 }
 
 TEST_P(ArmExidxDecodeTest, pop_mmx_wcgr) {
@@ -823,38 +1192,56 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {wCGR0}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {wCGR0}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported wCGR register display\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10004U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xc7);
   data_->push_back(0x0a);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {wCGR1, wCGR3}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {wCGR1, wCGR3}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported wCGR register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x1000cU, exidx_->cfa());
+  ASSERT_EQ(0x10008U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xc7);
   data_->push_back(0x0f);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {wCGR0, wCGR1, wCGR2, wCGR3}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {wCGR0, wCGR1, wCGR2, wCGR3}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported wCGR register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x1001cU, exidx_->cfa());
+  ASSERT_EQ(0x10010U, exidx_->cfa());
 }
 
 TEST_P(ArmExidxDecodeTest, pop_vfp16_vpush) {
@@ -864,38 +1251,56 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {d16}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {d16}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported DX register display\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10008U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xc8);
   data_->push_back(0x14);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {d17-d21}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {d17-d21}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported DX register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x10030U, exidx_->cfa());
+  ASSERT_EQ(0x10028U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xc8);
   data_->push_back(0xff);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {d31-d46}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {d31-d46}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported DX register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x100b0U, exidx_->cfa());
+  ASSERT_EQ(0x10080U, exidx_->cfa());
 }
 
 TEST_P(ArmExidxDecodeTest, pop_vfp_vpush) {
@@ -905,38 +1310,56 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {d0}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {d0}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported DX register display\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10008U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xc9);
   data_->push_back(0x23);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {d2-d5}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {d2-d5}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported DX register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x10028U, exidx_->cfa());
+  ASSERT_EQ(0x10020U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xc9);
   data_->push_back(0xff);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {d15-d30}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {d15-d30}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported DX register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x100a8U, exidx_->cfa());
+  ASSERT_EQ(0x10080U, exidx_->cfa());
 }
 
 TEST_P(ArmExidxDecodeTest, pop_vfp8_vpush) {
@@ -945,36 +1368,54 @@
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {d8}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {d8}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported DX register display\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10008U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xd2);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {d8-d10}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {d8-d10}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported DX register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x10020U, exidx_->cfa());
+  ASSERT_EQ(0x10018U, exidx_->cfa());
 
-  ResetLogs();
+  ResetExidx();
   data_->push_back(0xd7);
   ASSERT_TRUE(exidx_->Decode());
   ASSERT_FALSE(exidx_->pc_set());
   ASSERT_EQ("", GetFakeLogBuf());
-  if (log_) {
-    ASSERT_EQ("4 unwind pop {d8-d15}\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ("4 unwind pop {d8-d15}\n", GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      ASSERT_EQ("4 unwind Unsupported DX register display\n", GetFakeLogPrint());
+      break;
   }
-  ASSERT_EQ(0x10060U, exidx_->cfa());
+  ASSERT_EQ(0x10040U, exidx_->cfa());
 }
 
 TEST_P(ArmExidxDecodeTest, expect_truncated) {
@@ -1047,32 +1488,147 @@
 TEST_P(ArmExidxDecodeTest, eval_multiple_decodes) {
   // vsp = vsp + 4
   data_->push_back(0x00);
-  // vsp = vsp + 8
+  // vsp = vsp + 12
   data_->push_back(0x02);
   // Finish
   data_->push_back(0xb0);
 
   ASSERT_TRUE(exidx_->Eval());
-  if (log_) {
-    ASSERT_EQ("4 unwind vsp = vsp + 4\n"
-              "4 unwind vsp = vsp + 12\n"
-              "4 unwind finish\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ(
+          "4 unwind vsp = vsp + 4\n"
+          "4 unwind vsp = vsp + 12\n"
+          "4 unwind finish\n",
+          GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ("4 unwind cfa = r13 + 16\n", GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10010U, exidx_->cfa());
   ASSERT_FALSE(exidx_->pc_set());
 }
 
+TEST_P(ArmExidxDecodeTest, eval_vsp_add_after_pop) {
+  // Pop {r15}
+  data_->push_back(0x88);
+  data_->push_back(0x00);
+  // vsp = vsp + 12
+  data_->push_back(0x02);
+  // Finish
+  data_->push_back(0xb0);
+  process_memory_.SetData32(0x10000, 0x10);
+
+  ASSERT_TRUE(exidx_->Eval());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ(
+          "4 unwind pop {r15}\n"
+          "4 unwind vsp = vsp + 12\n"
+          "4 unwind finish\n",
+          GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 16\n"
+          "4 unwind r15 = [cfa - 16]\n",
+          GetFakeLogPrint());
+      break;
+  }
+  ASSERT_EQ(0x10010U, exidx_->cfa());
+  ASSERT_TRUE(exidx_->pc_set());
+  ASSERT_EQ(0x10U, (*exidx_->regs())[15]);
+}
+
+TEST_P(ArmExidxDecodeTest, eval_vsp_add_large_after_pop) {
+  // Pop {r15}
+  data_->push_back(0x88);
+  data_->push_back(0x00);
+  // vsp = vsp + 1024
+  data_->push_back(0xb2);
+  data_->push_back(0x7f);
+  // Finish
+  data_->push_back(0xb0);
+  process_memory_.SetData32(0x10000, 0x10);
+
+  ASSERT_TRUE(exidx_->Eval());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ(
+          "4 unwind pop {r15}\n"
+          "4 unwind vsp = vsp + 1024\n"
+          "4 unwind finish\n",
+          GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 1028\n"
+          "4 unwind r15 = [cfa - 1028]\n",
+          GetFakeLogPrint());
+      break;
+  }
+  ASSERT_EQ(0x10404U, exidx_->cfa());
+  ASSERT_TRUE(exidx_->pc_set());
+  ASSERT_EQ(0x10U, (*exidx_->regs())[15]);
+}
+
+TEST_P(ArmExidxDecodeTest, eval_vsp_sub_after_pop) {
+  // Pop {r15}
+  data_->push_back(0x88);
+  data_->push_back(0x00);
+  // vsp = vsp - 4
+  data_->push_back(0x41);
+  // Finish
+  data_->push_back(0xb0);
+  process_memory_.SetData32(0x10000, 0x10);
+
+  ASSERT_TRUE(exidx_->Eval());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ(
+          "4 unwind pop {r15}\n"
+          "4 unwind vsp = vsp - 8\n"
+          "4 unwind finish\n",
+          GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 - 4\n"
+          "4 unwind r15 = [cfa + 4]\n",
+          GetFakeLogPrint());
+      break;
+  }
+  ASSERT_EQ(0xfffcU, exidx_->cfa());
+  ASSERT_TRUE(exidx_->pc_set());
+  ASSERT_EQ(0x10U, (*exidx_->regs())[15]);
+}
+
 TEST_P(ArmExidxDecodeTest, eval_pc_set) {
   // vsp = vsp + 4
   data_->push_back(0x00);
-  // vsp = vsp + 8
+  // vsp = vsp + 12
   data_->push_back(0x02);
   // Pop {r15}
   data_->push_back(0x88);
   data_->push_back(0x00);
-  // vsp = vsp + 8
+  // vsp = vsp + 12
   data_->push_back(0x02);
   // Finish
   data_->push_back(0xb0);
@@ -1080,20 +1636,33 @@
   process_memory_.SetData32(0x10010, 0x10);
 
   ASSERT_TRUE(exidx_->Eval());
-  if (log_) {
-    ASSERT_EQ("4 unwind vsp = vsp + 4\n"
-              "4 unwind vsp = vsp + 12\n"
-              "4 unwind pop {r15}\n"
-              "4 unwind vsp = vsp + 12\n"
-              "4 unwind finish\n", GetFakeLogPrint());
-  } else {
-    ASSERT_EQ("", GetFakeLogPrint());
+  switch (log_) {
+    case ARM_LOG_NONE:
+      ASSERT_EQ("", GetFakeLogPrint());
+      break;
+    case ARM_LOG_FULL:
+      ASSERT_EQ(
+          "4 unwind vsp = vsp + 4\n"
+          "4 unwind vsp = vsp + 12\n"
+          "4 unwind pop {r15}\n"
+          "4 unwind vsp = vsp + 12\n"
+          "4 unwind finish\n",
+          GetFakeLogPrint());
+      break;
+    case ARM_LOG_BY_REG:
+      exidx_->LogByReg();
+      ASSERT_EQ(
+          "4 unwind cfa = r13 + 32\n"
+          "4 unwind r15 = [cfa - 16]\n",
+          GetFakeLogPrint());
+      break;
   }
   ASSERT_EQ(0x10020U, exidx_->cfa());
   ASSERT_TRUE(exidx_->pc_set());
   ASSERT_EQ(0x10U, (*exidx_->regs())[15]);
 }
 
-INSTANTIATE_TEST_CASE_P(, ArmExidxDecodeTest, ::testing::Values("logging", "no_logging"));
+INSTANTIATE_TEST_CASE_P(, ArmExidxDecodeTest,
+                        ::testing::Values("logging", "register_logging", "no_logging"));
 
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/ArmExidxExtractTest.cpp b/libunwindstack/tests/ArmExidxExtractTest.cpp
index 8d0f0e5..79c799c 100644
--- a/libunwindstack/tests/ArmExidxExtractTest.cpp
+++ b/libunwindstack/tests/ArmExidxExtractTest.cpp
@@ -301,7 +301,7 @@
   elf_memory_.SetData32(0x1000, 0x7fff2340);
   elf_memory_.SetData32(0x1004, 1);
 
-  exidx_->set_log(true);
+  exidx_->set_log(ARM_LOG_FULL);
   exidx_->set_log_indent(0);
   exidx_->set_log_skip_execution(false);
 
@@ -316,7 +316,7 @@
   elf_memory_.SetData32(0x4000, 0x7ffa3000);
   elf_memory_.SetData32(0x4004, 0x80a8b0b0);
 
-  exidx_->set_log(true);
+  exidx_->set_log(ARM_LOG_FULL);
   exidx_->set_log_indent(0);
   exidx_->set_log_skip_execution(false);
 
@@ -330,7 +330,7 @@
   elf_memory_.SetData32(0x6234, 0x2);
   elf_memory_.SetData32(0x6238, 0x00112233);
 
-  exidx_->set_log(true);
+  exidx_->set_log(ARM_LOG_FULL);
   exidx_->set_log_indent(0);
   exidx_->set_log_skip_execution(false);
 
diff --git a/libunwindstack/tests/DwarfCfaLogTest.cpp b/libunwindstack/tests/DwarfCfaLogTest.cpp
index b17ca33..bb2e8f0 100644
--- a/libunwindstack/tests/DwarfCfaLogTest.cpp
+++ b/libunwindstack/tests/DwarfCfaLogTest.cpp
@@ -79,7 +79,7 @@
     this->memory_.SetMemory(0x2000, std::vector<uint8_t>{i});
 
     ResetLogs();
-    ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x2000, 0x2001));
+    ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x2000, 0x2001));
     std::string expected = "4 unwind Illegal\n";
     expected += android::base::StringPrintf("4 unwind Raw Data: 0x%02x\n", i);
     ASSERT_EQ(expected, GetFakeLogPrint());
@@ -90,7 +90,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_nop) {
   this->memory_.SetMemory(0x2000, std::vector<uint8_t>{0x00});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x2000, 0x2001));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x2000, 0x2001));
   std::string expected =
       "4 unwind DW_CFA_nop\n"
       "4 unwind Raw Data: 0x00\n";
@@ -101,7 +101,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_offset) {
   this->memory_.SetMemory(0x2000, std::vector<uint8_t>{0x83, 0x04});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x2000, 0x2002));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x2000, 0x2002));
   std::string expected =
       "4 unwind DW_CFA_offset register(3) 4\n"
       "4 unwind Raw Data: 0x83 0x04\n";
@@ -111,7 +111,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x2100, std::vector<uint8_t>{0x83, 0x84, 0x01});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x2100, 0x2103));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x2100, 0x2103));
   expected =
       "4 unwind DW_CFA_offset register(3) 132\n"
       "4 unwind Raw Data: 0x83 0x84 0x01\n";
@@ -122,7 +122,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_offset_extended) {
   this->memory_.SetMemory(0x500, std::vector<uint8_t>{0x05, 0x03, 0x02});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x500, 0x503));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x500, 0x503));
   std::string expected =
       "4 unwind DW_CFA_offset_extended register(3) 2\n"
       "4 unwind Raw Data: 0x05 0x03 0x02\n";
@@ -132,7 +132,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x1500, std::vector<uint8_t>{0x05, 0x81, 0x01, 0x82, 0x12});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x1500, 0x1505));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x1500, 0x1505));
   expected =
       "4 unwind DW_CFA_offset_extended register(129) 2306\n"
       "4 unwind Raw Data: 0x05 0x81 0x01 0x82 0x12\n";
@@ -143,7 +143,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_offset_extended_sf) {
   this->memory_.SetMemory(0x500, std::vector<uint8_t>{0x11, 0x05, 0x10});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x500, 0x503));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x500, 0x503));
   std::string expected =
       "4 unwind DW_CFA_offset_extended_sf register(5) 16\n"
       "4 unwind Raw Data: 0x11 0x05 0x10\n";
@@ -154,7 +154,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x1500, std::vector<uint8_t>{0x11, 0x86, 0x01, 0xff, 0x7f});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x1500, 0x1505));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x1500, 0x1505));
   expected =
       "4 unwind DW_CFA_offset_extended_sf register(134) -1\n"
       "4 unwind Raw Data: 0x11 0x86 0x01 0xff 0x7f\n";
@@ -165,7 +165,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_restore) {
   this->memory_.SetMemory(0x2000, std::vector<uint8_t>{0xc2});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x2000, 0x2001));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x2000, 0x2001));
   std::string expected =
       "4 unwind DW_CFA_restore register(2)\n"
       "4 unwind Raw Data: 0xc2\n";
@@ -175,7 +175,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x3000, std::vector<uint8_t>{0x82, 0x04, 0xc2});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x3000, 0x3003));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x3000, 0x3003));
   expected =
       "4 unwind DW_CFA_offset register(2) 4\n"
       "4 unwind Raw Data: 0x82 0x04\n"
@@ -188,7 +188,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_restore_extended) {
   this->memory_.SetMemory(0x4000, std::vector<uint8_t>{0x06, 0x08});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x4000, 0x4002));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x4000, 0x4002));
   std::string expected =
       "4 unwind DW_CFA_restore_extended register(8)\n"
       "4 unwind Raw Data: 0x06 0x08\n";
@@ -198,7 +198,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x5000, std::vector<uint8_t>{0x05, 0x82, 0x02, 0x04, 0x06, 0x82, 0x02});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x5000, 0x5007));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x5000, 0x5007));
   expected =
       "4 unwind DW_CFA_offset_extended register(258) 4\n"
       "4 unwind Raw Data: 0x05 0x82 0x02 0x04\n"
@@ -228,7 +228,7 @@
   this->memory_.SetMemory(0x50, buffer, sizeof(buffer));
   ResetLogs();
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x50, 0x51 + sizeof(TypeParam)));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x50, 0x51 + sizeof(TypeParam)));
   std::string expected = "4 unwind DW_CFA_set_loc " + address_str + "\n";
   expected += "4 unwind " + raw_data + "\n";
   expected += "4 unwind \n";
@@ -240,7 +240,7 @@
   ResetLogs();
   this->fde_.pc_start = address + 0x10;
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x50, 0x51 + sizeof(TypeParam)));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x50, 0x51 + sizeof(TypeParam)));
   expected = "4 unwind DW_CFA_set_loc " + address_str + "\n";
   expected += "4 unwind " + raw_data + "\n";
   expected += "4 unwind \n";
@@ -252,7 +252,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_advance_loc) {
   this->memory_.SetMemory(0x200, std::vector<uint8_t>{0x44});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x200, 0x201));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x200, 0x201));
   std::string expected =
       "4 unwind DW_CFA_advance_loc 4\n"
       "4 unwind Raw Data: 0x44\n"
@@ -260,22 +260,12 @@
       "4 unwind PC 0x2010\n";
   ASSERT_EQ(expected, GetFakeLogPrint());
   ASSERT_EQ("", GetFakeLogBuf());
-
-  ResetLogs();
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x100, 0x200, 0x201));
-  expected =
-      "4 unwind DW_CFA_advance_loc 4\n"
-      "4 unwind Raw Data: 0x44\n"
-      "4 unwind \n"
-      "4 unwind PC 0x2110\n";
-  ASSERT_EQ(expected, GetFakeLogPrint());
-  ASSERT_EQ("", GetFakeLogBuf());
 }
 
 TYPED_TEST_P(DwarfCfaLogTest, cfa_advance_loc1) {
   this->memory_.SetMemory(0x200, std::vector<uint8_t>{0x02, 0x04});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x200, 0x202));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x200, 0x202));
   std::string expected =
       "4 unwind DW_CFA_advance_loc1 4\n"
       "4 unwind Raw Data: 0x02 0x04\n"
@@ -283,22 +273,12 @@
       "4 unwind PC 0x2004\n";
   ASSERT_EQ(expected, GetFakeLogPrint());
   ASSERT_EQ("", GetFakeLogBuf());
-
-  ResetLogs();
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x10, 0x200, 0x202));
-  expected =
-      "4 unwind DW_CFA_advance_loc1 4\n"
-      "4 unwind Raw Data: 0x02 0x04\n"
-      "4 unwind \n"
-      "4 unwind PC 0x2014\n";
-  ASSERT_EQ(expected, GetFakeLogPrint());
-  ASSERT_EQ("", GetFakeLogBuf());
 }
 
 TYPED_TEST_P(DwarfCfaLogTest, cfa_advance_loc2) {
   this->memory_.SetMemory(0x600, std::vector<uint8_t>{0x03, 0x04, 0x03});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x600, 0x603));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x600, 0x603));
   std::string expected =
       "4 unwind DW_CFA_advance_loc2 772\n"
       "4 unwind Raw Data: 0x03 0x04 0x03\n"
@@ -306,22 +286,12 @@
       "4 unwind PC 0x2304\n";
   ASSERT_EQ(expected, GetFakeLogPrint());
   ASSERT_EQ("", GetFakeLogBuf());
-
-  ResetLogs();
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x1000, 0x600, 0x603));
-  expected =
-      "4 unwind DW_CFA_advance_loc2 772\n"
-      "4 unwind Raw Data: 0x03 0x04 0x03\n"
-      "4 unwind \n"
-      "4 unwind PC 0x3304\n";
-  ASSERT_EQ(expected, GetFakeLogPrint());
-  ASSERT_EQ("", GetFakeLogBuf());
 }
 
 TYPED_TEST_P(DwarfCfaLogTest, cfa_advance_loc4) {
   this->memory_.SetMemory(0x500, std::vector<uint8_t>{0x04, 0x04, 0x03, 0x02, 0x01});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x500, 0x505));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x500, 0x505));
   std::string expected =
       "4 unwind DW_CFA_advance_loc4 16909060\n"
       "4 unwind Raw Data: 0x04 0x04 0x03 0x02 0x01\n"
@@ -329,22 +299,12 @@
       "4 unwind PC 0x1022304\n";
   ASSERT_EQ(expected, GetFakeLogPrint());
   ASSERT_EQ("", GetFakeLogBuf());
-
-  ResetLogs();
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x2000, 0x500, 0x505));
-  expected =
-      "4 unwind DW_CFA_advance_loc4 16909060\n"
-      "4 unwind Raw Data: 0x04 0x04 0x03 0x02 0x01\n"
-      "4 unwind \n"
-      "4 unwind PC 0x1024304\n";
-  ASSERT_EQ(expected, GetFakeLogPrint());
-  ASSERT_EQ("", GetFakeLogBuf());
 }
 
 TYPED_TEST_P(DwarfCfaLogTest, cfa_undefined) {
   this->memory_.SetMemory(0xa00, std::vector<uint8_t>{0x07, 0x09});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0xa00, 0xa02));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0xa00, 0xa02));
   std::string expected =
       "4 unwind DW_CFA_undefined register(9)\n"
       "4 unwind Raw Data: 0x07 0x09\n";
@@ -355,7 +315,7 @@
   dwarf_loc_regs_t cie_loc_regs;
   this->memory_.SetMemory(0x1a00, std::vector<uint8_t>{0x07, 0x81, 0x01});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x1a00, 0x1a03));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x1a00, 0x1a03));
   expected =
       "4 unwind DW_CFA_undefined register(129)\n"
       "4 unwind Raw Data: 0x07 0x81 0x01\n";
@@ -366,7 +326,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_same) {
   this->memory_.SetMemory(0x100, std::vector<uint8_t>{0x08, 0x7f});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x100, 0x102));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x100, 0x102));
   std::string expected =
       "4 unwind DW_CFA_same_value register(127)\n"
       "4 unwind Raw Data: 0x08 0x7f\n";
@@ -376,7 +336,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x2100, std::vector<uint8_t>{0x08, 0xff, 0x01});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x2100, 0x2103));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x2100, 0x2103));
   expected =
       "4 unwind DW_CFA_same_value register(255)\n"
       "4 unwind Raw Data: 0x08 0xff 0x01\n";
@@ -387,7 +347,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_register) {
   this->memory_.SetMemory(0x300, std::vector<uint8_t>{0x09, 0x02, 0x01});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x300, 0x303));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x300, 0x303));
   std::string expected =
       "4 unwind DW_CFA_register register(2) register(1)\n"
       "4 unwind Raw Data: 0x09 0x02 0x01\n";
@@ -397,7 +357,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x4300, std::vector<uint8_t>{0x09, 0xff, 0x01, 0xff, 0x03});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x4300, 0x4305));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x4300, 0x4305));
   expected =
       "4 unwind DW_CFA_register register(255) register(511)\n"
       "4 unwind Raw Data: 0x09 0xff 0x01 0xff 0x03\n";
@@ -408,7 +368,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_state) {
   this->memory_.SetMemory(0x300, std::vector<uint8_t>{0x0a});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x300, 0x301));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x300, 0x301));
 
   std::string expected =
       "4 unwind DW_CFA_remember_state\n"
@@ -419,7 +379,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x4300, std::vector<uint8_t>{0x0b});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x4300, 0x4301));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x4300, 0x4301));
 
   expected =
       "4 unwind DW_CFA_restore_state\n"
@@ -431,7 +391,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_state_cfa_offset_restore) {
   this->memory_.SetMemory(0x3000, std::vector<uint8_t>{0x0a, 0x0e, 0x40, 0x0b});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x3000, 0x3004));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x3000, 0x3004));
 
   std::string expected =
       "4 unwind DW_CFA_remember_state\n"
@@ -447,7 +407,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_def_cfa) {
   this->memory_.SetMemory(0x100, std::vector<uint8_t>{0x0c, 0x7f, 0x74});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x100, 0x103));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x100, 0x103));
 
   std::string expected =
       "4 unwind DW_CFA_def_cfa register(127) 116\n"
@@ -458,7 +418,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x200, std::vector<uint8_t>{0x0c, 0xff, 0x02, 0xf4, 0x04});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x200, 0x205));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x200, 0x205));
 
   expected =
       "4 unwind DW_CFA_def_cfa register(383) 628\n"
@@ -470,7 +430,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_def_cfa_sf) {
   this->memory_.SetMemory(0x100, std::vector<uint8_t>{0x12, 0x30, 0x25});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x100, 0x103));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x100, 0x103));
 
   std::string expected =
       "4 unwind DW_CFA_def_cfa_sf register(48) 37\n"
@@ -482,7 +442,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x200, std::vector<uint8_t>{0x12, 0xa3, 0x01, 0xfa, 0x7f});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x200, 0x205));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x200, 0x205));
 
   expected =
       "4 unwind DW_CFA_def_cfa_sf register(163) -6\n"
@@ -494,7 +454,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_def_cfa_register) {
   this->memory_.SetMemory(0x100, std::vector<uint8_t>{0x0d, 0x72});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x100, 0x102));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x100, 0x102));
 
   std::string expected =
       "4 unwind DW_CFA_def_cfa_register register(114)\n"
@@ -505,7 +465,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x200, std::vector<uint8_t>{0x0d, 0xf9, 0x20});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x200, 0x203));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x200, 0x203));
 
   expected =
       "4 unwind DW_CFA_def_cfa_register register(4217)\n"
@@ -517,7 +477,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_def_cfa_offset) {
   this->memory_.SetMemory(0x100, std::vector<uint8_t>{0x0e, 0x59});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x100, 0x102));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x100, 0x102));
 
   std::string expected =
       "4 unwind DW_CFA_def_cfa_offset 89\n"
@@ -526,7 +486,7 @@
   ASSERT_EQ("", GetFakeLogBuf());
 
   ResetLogs();
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x100, 0x102));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x100, 0x102));
 
   expected =
       "4 unwind DW_CFA_def_cfa_offset 89\n"
@@ -537,7 +497,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x200, std::vector<uint8_t>{0x0e, 0xd4, 0x0a});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x200, 0x203));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x200, 0x203));
 
   expected =
       "4 unwind DW_CFA_def_cfa_offset 1364\n"
@@ -549,7 +509,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_def_cfa_offset_sf) {
   this->memory_.SetMemory(0x100, std::vector<uint8_t>{0x13, 0x23});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x100, 0x102));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x100, 0x102));
 
   std::string expected =
       "4 unwind DW_CFA_def_cfa_offset_sf 35\n"
@@ -558,7 +518,7 @@
   ASSERT_EQ("", GetFakeLogBuf());
 
   ResetLogs();
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x100, 0x102));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x100, 0x102));
 
   expected =
       "4 unwind DW_CFA_def_cfa_offset_sf 35\n"
@@ -570,7 +530,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x200, std::vector<uint8_t>{0x13, 0xf6, 0x7f});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x200, 0x203));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x200, 0x203));
 
   expected =
       "4 unwind DW_CFA_def_cfa_offset_sf -10\n"
@@ -582,7 +542,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_def_cfa_expression) {
   this->memory_.SetMemory(0x100, std::vector<uint8_t>{0x0f, 0x04, 0x01, 0x02, 0x04, 0x05});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x100, 0x106));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x100, 0x106));
 
   std::string expected =
       "4 unwind DW_CFA_def_cfa_expression 4\n"
@@ -614,7 +574,7 @@
   }
   expected += '\n';
   this->memory_.SetMemory(0x200, ops);
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x200, 0x284));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x200, 0x284));
 
   expected = "4 unwind DW_CFA_def_cfa_expression 129\n" + expected;
   ASSERT_EQ(expected + op_string, GetFakeLogPrint());
@@ -624,7 +584,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_expression) {
   this->memory_.SetMemory(0x100, std::vector<uint8_t>{0x10, 0x04, 0x02, 0xc0, 0xc1});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x100, 0x105));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x100, 0x105));
 
   std::string expected =
       "4 unwind DW_CFA_expression register(4) 2\n"
@@ -652,7 +612,7 @@
   expected = "4 unwind DW_CFA_expression register(255) 130\n" + expected + "\n";
 
   this->memory_.SetMemory(0x200, ops);
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x200, 0x287));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x200, 0x287));
 
   ASSERT_EQ(expected + op_string, GetFakeLogPrint());
   ASSERT_EQ("", GetFakeLogBuf());
@@ -661,7 +621,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_val_offset) {
   this->memory_.SetMemory(0x100, std::vector<uint8_t>{0x14, 0x45, 0x54});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x100, 0x103));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x100, 0x103));
 
   std::string expected =
       "4 unwind DW_CFA_val_offset register(69) 84\n"
@@ -672,7 +632,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x400, std::vector<uint8_t>{0x14, 0xa2, 0x02, 0xb4, 0x05});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x400, 0x405));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x400, 0x405));
 
   expected =
       "4 unwind DW_CFA_val_offset register(290) 692\n"
@@ -684,7 +644,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_val_offset_sf) {
   this->memory_.SetMemory(0x100, std::vector<uint8_t>{0x15, 0x56, 0x12});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x100, 0x103));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x100, 0x103));
 
   std::string expected =
       "4 unwind DW_CFA_val_offset_sf register(86) 18\n"
@@ -696,7 +656,7 @@
   ResetLogs();
   this->memory_.SetMemory(0xa00, std::vector<uint8_t>{0x15, 0xff, 0x01, 0xc0, 0x7f});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0xa00, 0xa05));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0xa00, 0xa05));
 
   expected =
       "4 unwind DW_CFA_val_offset_sf register(255) -64\n"
@@ -708,7 +668,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_val_expression) {
   this->memory_.SetMemory(0x100, std::vector<uint8_t>{0x16, 0x05, 0x02, 0xb0, 0xb1});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x100, 0x105));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x100, 0x105));
 
   std::string expected =
       "4 unwind DW_CFA_val_expression register(5) 2\n"
@@ -737,7 +697,7 @@
 
   this->memory_.SetMemory(0xa00, ops);
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0xa00, 0xaad));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0xa00, 0xaad));
 
   ASSERT_EQ(expected + op_string, GetFakeLogPrint());
   ASSERT_EQ("", GetFakeLogBuf());
@@ -746,7 +706,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_gnu_args_size) {
   this->memory_.SetMemory(0x2000, std::vector<uint8_t>{0x2e, 0x04});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x2000, 0x2002));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x2000, 0x2002));
 
   std::string expected =
       "4 unwind DW_CFA_GNU_args_size 4\n"
@@ -757,7 +717,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x5000, std::vector<uint8_t>{0x2e, 0xa4, 0x80, 0x04});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x5000, 0x5004));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x5000, 0x5004));
 
   expected =
       "4 unwind DW_CFA_GNU_args_size 65572\n"
@@ -769,7 +729,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_gnu_negative_offset_extended) {
   this->memory_.SetMemory(0x500, std::vector<uint8_t>{0x2f, 0x08, 0x10});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x500, 0x503));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x500, 0x503));
 
   std::string expected =
       "4 unwind DW_CFA_GNU_negative_offset_extended register(8) 16\n"
@@ -780,7 +740,7 @@
   ResetLogs();
   this->memory_.SetMemory(0x1500, std::vector<uint8_t>{0x2f, 0x81, 0x02, 0xff, 0x01});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x1500, 0x1505));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x1500, 0x1505));
 
   expected =
       "4 unwind DW_CFA_GNU_negative_offset_extended register(257) 255\n"
@@ -792,7 +752,7 @@
 TYPED_TEST_P(DwarfCfaLogTest, cfa_register_override) {
   this->memory_.SetMemory(0x300, std::vector<uint8_t>{0x09, 0x02, 0x01, 0x09, 0x02, 0x04});
 
-  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0, 0x300, 0x306));
+  ASSERT_TRUE(this->cfa_->Log(0, this->fde_.pc_start, 0x300, 0x306));
 
   std::string expected =
       "4 unwind DW_CFA_register register(2) register(1)\n"
diff --git a/libunwindstack/tests/DwarfDebugFrameTest.cpp b/libunwindstack/tests/DwarfDebugFrameTest.cpp
index c28a41e..3a52044 100644
--- a/libunwindstack/tests/DwarfDebugFrameTest.cpp
+++ b/libunwindstack/tests/DwarfDebugFrameTest.cpp
@@ -103,7 +103,7 @@
   this->memory_.SetData32(0x5508, 0x4500);
   this->memory_.SetData32(0x550c, 0x500);
 
-  ASSERT_TRUE(this->debug_frame_->Init(0x5000, 0x600));
+  ASSERT_TRUE(this->debug_frame_->Init(0x5000, 0x600, 0));
   ASSERT_EQ(4U, this->debug_frame_->TestGetFdeCount());
 
   typename DwarfDebugFrame<TypeParam>::FdeInfo info(0, 0, 0);
@@ -142,7 +142,7 @@
   this->memory_.SetData32(0x5108, 0x1500);
   this->memory_.SetData32(0x510c, 0x200);
 
-  ASSERT_FALSE(this->debug_frame_->Init(0x5000, 0x600));
+  ASSERT_FALSE(this->debug_frame_->Init(0x5000, 0x600, 0));
   ASSERT_EQ(DWARF_ERROR_ILLEGAL_VALUE, this->debug_frame_->LastErrorCode());
 }
 
@@ -181,7 +181,7 @@
   this->memory_.SetData32(0x5508, 0x4500);
   this->memory_.SetData32(0x550c, 0x500);
 
-  ASSERT_TRUE(this->debug_frame_->Init(0x5000, 0x600));
+  ASSERT_TRUE(this->debug_frame_->Init(0x5000, 0x600, 0));
   ASSERT_EQ(2U, this->debug_frame_->TestGetFdeCount());
 }
 
@@ -226,7 +226,7 @@
   this->memory_.SetData64(0x5514, 0x4500);
   this->memory_.SetData64(0x551c, 0x500);
 
-  ASSERT_TRUE(this->debug_frame_->Init(0x5000, 0x600));
+  ASSERT_TRUE(this->debug_frame_->Init(0x5000, 0x600, 0));
   ASSERT_EQ(4U, this->debug_frame_->TestGetFdeCount());
 
   typename DwarfDebugFrame<TypeParam>::FdeInfo info(0, 0, 0);
@@ -267,7 +267,7 @@
   this->memory_.SetData64(0x5114, 0x1500);
   this->memory_.SetData64(0x511c, 0x200);
 
-  ASSERT_FALSE(this->debug_frame_->Init(0x5000, 0x600));
+  ASSERT_FALSE(this->debug_frame_->Init(0x5000, 0x600, 0));
   ASSERT_EQ(DWARF_ERROR_ILLEGAL_VALUE, this->debug_frame_->LastErrorCode());
 }
 
@@ -312,10 +312,48 @@
   this->memory_.SetData64(0x5514, 0x4500);
   this->memory_.SetData64(0x551c, 0x500);
 
-  ASSERT_TRUE(this->debug_frame_->Init(0x5000, 0x600));
+  ASSERT_TRUE(this->debug_frame_->Init(0x5000, 0x600, 0));
   ASSERT_EQ(2U, this->debug_frame_->TestGetFdeCount());
 }
 
+TYPED_TEST_P(DwarfDebugFrameTest, Init_non_zero_load_bias) {
+  // CIE 32 information.
+  this->memory_.SetData32(0x5000, 0xfc);
+  this->memory_.SetData32(0x5004, 0xffffffff);
+  this->memory_.SetData8(0x5008, 1);
+  this->memory_.SetData8(0x5009, 'z');
+  this->memory_.SetData8(0x500a, 'R');
+  this->memory_.SetData8(0x500b, '\0');
+  this->memory_.SetData8(0x500c, 0);
+  this->memory_.SetData8(0x500d, 0);
+  this->memory_.SetData8(0x500e, 0);
+  this->memory_.SetData8(0x500f, 0);
+  this->memory_.SetData8(0x5010, 0x1b);
+
+  // FDE 32 information.
+  this->memory_.SetData32(0x5100, 0xfc);
+  this->memory_.SetData32(0x5104, 0);
+  this->memory_.SetData32(0x5108, 0x1500);
+  this->memory_.SetData32(0x510c, 0x200);
+  this->memory_.SetData8(0x5110, 0);
+  this->memory_.SetData8(0x5111, 0);
+
+  ASSERT_TRUE(this->debug_frame_->Init(0x5000, 0x200, 0x1000));
+  ASSERT_EQ(1U, this->debug_frame_->TestGetFdeCount());
+
+  typename DwarfDebugFrame<TypeParam>::FdeInfo info(0, 0, 0);
+
+  this->debug_frame_->TestGetFdeInfo(0, &info);
+  EXPECT_EQ(0x5100U, info.offset);
+  EXPECT_EQ(0x2500U, info.start);
+  EXPECT_EQ(0x2700U, info.end);
+
+  const DwarfFde* fde = this->debug_frame_->GetFdeFromPc(0x2504);
+  ASSERT_TRUE(fde != nullptr);
+  EXPECT_EQ(0x2500U, fde->pc_start);
+  EXPECT_EQ(0x2700U, fde->pc_end);
+}
+
 TYPED_TEST_P(DwarfDebugFrameTest, Init_version1) {
   // CIE 32 information.
   this->memory_.SetData32(0x5000, 0xfc);
@@ -340,7 +378,7 @@
   this->memory_.SetData16(0x5108, 0x1500);
   this->memory_.SetData16(0x510a, 0x200);
 
-  ASSERT_TRUE(this->debug_frame_->Init(0x5000, 0x200));
+  ASSERT_TRUE(this->debug_frame_->Init(0x5000, 0x200, 0));
   ASSERT_EQ(1U, this->debug_frame_->TestGetFdeCount());
 
   typename DwarfDebugFrame<TypeParam>::FdeInfo info(0, 0, 0);
@@ -383,7 +421,7 @@
   this->memory_.SetData16(0x5108, 0x1500);
   this->memory_.SetData16(0x510a, 0x200);
 
-  ASSERT_TRUE(this->debug_frame_->Init(0x5000, 0x200));
+  ASSERT_TRUE(this->debug_frame_->Init(0x5000, 0x200, 0));
   ASSERT_EQ(1U, this->debug_frame_->TestGetFdeCount());
 
   typename DwarfDebugFrame<TypeParam>::FdeInfo info(0, 0, 0);
@@ -538,8 +576,8 @@
 REGISTER_TYPED_TEST_CASE_P(DwarfDebugFrameTest, Init32, Init32_fde_not_following_cie,
                            Init32_do_not_fail_on_bad_next_entry, Init64,
                            Init64_do_not_fail_on_bad_next_entry, Init64_fde_not_following_cie,
-                           Init_version1, Init_version4, GetFdeOffsetFromPc, GetCieFde32,
-                           GetCieFde64);
+                           Init_non_zero_load_bias, Init_version1, Init_version4,
+                           GetFdeOffsetFromPc, GetCieFde32, GetCieFde64);
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfDebugFrameTestTypes;
 INSTANTIATE_TYPED_TEST_CASE_P(, DwarfDebugFrameTest, DwarfDebugFrameTestTypes);
diff --git a/libunwindstack/tests/DwarfEhFrameTest.cpp b/libunwindstack/tests/DwarfEhFrameTest.cpp
index a73db65..e8d53e6 100644
--- a/libunwindstack/tests/DwarfEhFrameTest.cpp
+++ b/libunwindstack/tests/DwarfEhFrameTest.cpp
@@ -103,7 +103,7 @@
   this->memory_.SetData32(0x5508, 0x4500);
   this->memory_.SetData32(0x550c, 0x500);
 
-  ASSERT_TRUE(this->eh_frame_->Init(0x5000, 0x600));
+  ASSERT_TRUE(this->eh_frame_->Init(0x5000, 0x600, 0));
   ASSERT_EQ(4U, this->eh_frame_->TestGetFdeCount());
 
   typename DwarfEhFrame<TypeParam>::FdeInfo info(0, 0, 0);
@@ -142,7 +142,7 @@
   this->memory_.SetData32(0x5108, 0x1500);
   this->memory_.SetData32(0x510c, 0x200);
 
-  ASSERT_FALSE(this->eh_frame_->Init(0x5000, 0x600));
+  ASSERT_FALSE(this->eh_frame_->Init(0x5000, 0x600, 0));
   ASSERT_EQ(DWARF_ERROR_ILLEGAL_VALUE, this->eh_frame_->LastErrorCode());
 }
 
@@ -187,7 +187,7 @@
   this->memory_.SetData64(0x5514, 0x4500);
   this->memory_.SetData64(0x551c, 0x500);
 
-  ASSERT_TRUE(this->eh_frame_->Init(0x5000, 0x600));
+  ASSERT_TRUE(this->eh_frame_->Init(0x5000, 0x600, 0));
   ASSERT_EQ(4U, this->eh_frame_->TestGetFdeCount());
 
   typename DwarfEhFrame<TypeParam>::FdeInfo info(0, 0, 0);
@@ -228,10 +228,48 @@
   this->memory_.SetData64(0x5114, 0x1500);
   this->memory_.SetData64(0x511c, 0x200);
 
-  ASSERT_FALSE(this->eh_frame_->Init(0x5000, 0x600));
+  ASSERT_FALSE(this->eh_frame_->Init(0x5000, 0x600, 0));
   ASSERT_EQ(DWARF_ERROR_ILLEGAL_VALUE, this->eh_frame_->LastErrorCode());
 }
 
+TYPED_TEST_P(DwarfEhFrameTest, Init_non_zero_load_bias) {
+  // CIE 32 information.
+  this->memory_.SetData32(0x5000, 0xfc);
+  this->memory_.SetData32(0x5004, 0);
+  this->memory_.SetData8(0x5008, 1);
+  this->memory_.SetData8(0x5009, 'z');
+  this->memory_.SetData8(0x500a, 'R');
+  this->memory_.SetData8(0x500b, '\0');
+  this->memory_.SetData8(0x500c, 0);
+  this->memory_.SetData8(0x500d, 0);
+  this->memory_.SetData8(0x500e, 0);
+  this->memory_.SetData8(0x500f, 0);
+  this->memory_.SetData8(0x5010, 0x1b);
+
+  // FDE 32 information.
+  this->memory_.SetData32(0x5100, 0xfc);
+  this->memory_.SetData32(0x5104, 0x104);
+  this->memory_.SetData32(0x5108, 0x1500);
+  this->memory_.SetData32(0x510c, 0x200);
+  this->memory_.SetData8(0x5110, 0);
+  this->memory_.SetData8(0x5111, 0);
+
+  ASSERT_TRUE(this->eh_frame_->Init(0x5000, 0x200, 0x2000));
+  ASSERT_EQ(1U, this->eh_frame_->TestGetFdeCount());
+
+  typename DwarfEhFrame<TypeParam>::FdeInfo info(0, 0, 0);
+
+  this->eh_frame_->TestGetFdeInfo(0, &info);
+  EXPECT_EQ(0x5100U, info.offset);
+  EXPECT_EQ(0x8608U, info.start);
+  EXPECT_EQ(0x8808U, info.end);
+
+  const DwarfFde* fde = this->eh_frame_->GetFdeFromPc(0x8700);
+  ASSERT_TRUE(fde != nullptr);
+  EXPECT_EQ(0x8608U, fde->pc_start);
+  EXPECT_EQ(0x8808U, fde->pc_end);
+}
+
 TYPED_TEST_P(DwarfEhFrameTest, Init_version1) {
   // CIE 32 information.
   this->memory_.SetData32(0x5000, 0xfc);
@@ -256,7 +294,7 @@
   this->memory_.SetData16(0x5108, 0x1500);
   this->memory_.SetData16(0x510a, 0x200);
 
-  ASSERT_TRUE(this->eh_frame_->Init(0x5000, 0x200));
+  ASSERT_TRUE(this->eh_frame_->Init(0x5000, 0x200, 0));
   ASSERT_EQ(1U, this->eh_frame_->TestGetFdeCount());
 
   typename DwarfEhFrame<TypeParam>::FdeInfo info(0, 0, 0);
@@ -299,7 +337,7 @@
   this->memory_.SetData16(0x5108, 0x1500);
   this->memory_.SetData16(0x510a, 0x200);
 
-  ASSERT_TRUE(this->eh_frame_->Init(0x5000, 0x200));
+  ASSERT_TRUE(this->eh_frame_->Init(0x5000, 0x200, 0));
   ASSERT_EQ(1U, this->eh_frame_->TestGetFdeCount());
 
   typename DwarfEhFrame<TypeParam>::FdeInfo info(0, 0, 0);
@@ -450,8 +488,8 @@
 }
 
 REGISTER_TYPED_TEST_CASE_P(DwarfEhFrameTest, Init32, Init32_fde_not_following_cie, Init64,
-                           Init64_fde_not_following_cie, Init_version1, Init_version4,
-                           GetFdeOffsetFromPc, GetCieFde32, GetCieFde64);
+                           Init64_fde_not_following_cie, Init_non_zero_load_bias, Init_version1,
+                           Init_version4, GetFdeOffsetFromPc, GetCieFde32, GetCieFde64);
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfEhFrameTestTypes;
 INSTANTIATE_TYPED_TEST_CASE_P(, DwarfEhFrameTest, DwarfEhFrameTestTypes);
diff --git a/libunwindstack/tests/DwarfEhFrameWithHdrTest.cpp b/libunwindstack/tests/DwarfEhFrameWithHdrTest.cpp
index 4240419..19c7b98 100644
--- a/libunwindstack/tests/DwarfEhFrameWithHdrTest.cpp
+++ b/libunwindstack/tests/DwarfEhFrameWithHdrTest.cpp
@@ -83,7 +83,7 @@
   this->memory_.SetData16(0x1004, 0x500);
   this->memory_.SetData32(0x1006, 126);
 
-  ASSERT_TRUE(this->eh_frame_->Init(0x1000, 0x100));
+  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());
@@ -97,19 +97,66 @@
 
   // Verify a zero fde count fails to init.
   this->memory_.SetData32(0x1006, 0);
-  ASSERT_FALSE(this->eh_frame_->Init(0x1000, 0x100));
+  ASSERT_FALSE(this->eh_frame_->Init(0x1000, 0x100, 0));
   ASSERT_EQ(DWARF_ERROR_NO_FDES, this->eh_frame_->LastErrorCode());
 
   // Verify an unexpected version will cause a fail.
   this->memory_.SetData32(0x1006, 126);
   this->memory_.SetData8(0x1000, 0);
-  ASSERT_FALSE(this->eh_frame_->Init(0x1000, 0x100));
+  ASSERT_FALSE(this->eh_frame_->Init(0x1000, 0x100, 0));
   ASSERT_EQ(DWARF_ERROR_UNSUPPORTED_VERSION, this->eh_frame_->LastErrorCode());
   this->memory_.SetData8(0x1000, 2);
-  ASSERT_FALSE(this->eh_frame_->Init(0x1000, 0x100));
+  ASSERT_FALSE(this->eh_frame_->Init(0x1000, 0x100, 0));
   ASSERT_EQ(DWARF_ERROR_UNSUPPORTED_VERSION, this->eh_frame_->LastErrorCode());
 }
 
+TYPED_TEST_P(DwarfEhFrameWithHdrTest, Init_non_zero_load_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_.SetData8(0x1308, 1);
+  this->memory_.SetData8(0x1309, 'z');
+  this->memory_.SetData8(0x130a, 'R');
+  this->memory_.SetData8(0x130b, '\0');
+  this->memory_.SetData8(0x130c, 0);
+  this->memory_.SetData8(0x130d, 0);
+  this->memory_.SetData8(0x130e, 0);
+  this->memory_.SetData8(0x130f, 0);
+  this->memory_.SetData8(0x1310, 0x1b);
+
+  // FDE 32 information.
+  this->memory_.SetData32(0x1400, 0xfc);
+  this->memory_.SetData32(0x1404, 0x104);
+  this->memory_.SetData32(0x1408, 0x10f8);
+  this->memory_.SetData32(0x140c, 0x200);
+  this->memory_.SetData8(0x1410, 0);
+  this->memory_.SetData8(0x1411, 0);
+
+  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());
+
+  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, GetFdeInfoFromIndex_expect_cache_fail) {
   this->eh_frame_->TestSetTableEntrySize(0x10);
   this->eh_frame_->TestSetTableEncoding(DW_EH_PE_udata4);
@@ -123,6 +170,7 @@
   EXPECT_EQ(0x1000U, this->eh_frame_->LastErrorAddress());
 }
 
+// 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);
@@ -134,8 +182,8 @@
 
   auto info = this->eh_frame_->GetFdeInfoFromIndex(2);
   ASSERT_TRUE(info != nullptr);
-  EXPECT_EQ(0x1380U, info->pc);
-  EXPECT_EQ(0x1540U, info->offset);
+  EXPECT_EQ(0x340U, info->pc);
+  EXPECT_EQ(0x500U, info->offset);
 }
 
 TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdeInfoFromIndex_read_datarel) {
@@ -430,14 +478,14 @@
   ASSERT_EQ(nullptr, this->eh_frame_->GetFdeFromPc(0x800));
 }
 
-REGISTER_TYPED_TEST_CASE_P(DwarfEhFrameWithHdrTest, Init, GetFdeInfoFromIndex_expect_cache_fail,
-                           GetFdeInfoFromIndex_read_pcrel, GetFdeInfoFromIndex_read_datarel,
-                           GetFdeInfoFromIndex_cached, GetFdeOffsetBinary_verify,
-                           GetFdeOffsetBinary_index_fail, GetFdeOffsetSequential,
-                           GetFdeOffsetSequential_last_element, GetFdeOffsetSequential_end_check,
-                           GetFdeOffsetFromPc_fail_fde_count, GetFdeOffsetFromPc_binary_search,
-                           GetFdeOffsetFromPc_sequential_search, GetCieFde32, GetCieFde64,
-                           GetFdeFromPc_fde_not_found);
+REGISTER_TYPED_TEST_CASE_P(DwarfEhFrameWithHdrTest, Init, Init_non_zero_load_bias,
+                           GetFdeInfoFromIndex_expect_cache_fail, GetFdeInfoFromIndex_read_pcrel,
+                           GetFdeInfoFromIndex_read_datarel, GetFdeInfoFromIndex_cached,
+                           GetFdeOffsetBinary_verify, GetFdeOffsetBinary_index_fail,
+                           GetFdeOffsetSequential, GetFdeOffsetSequential_last_element,
+                           GetFdeOffsetSequential_end_check, GetFdeOffsetFromPc_fail_fde_count,
+                           GetFdeOffsetFromPc_binary_search, GetFdeOffsetFromPc_sequential_search,
+                           GetCieFde32, GetCieFde64, GetFdeFromPc_fde_not_found);
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfEhFrameWithHdrTestTypes;
 INSTANTIATE_TYPED_TEST_CASE_P(, DwarfEhFrameWithHdrTest, DwarfEhFrameWithHdrTestTypes);
diff --git a/libunwindstack/tests/DwarfSectionImplTest.cpp b/libunwindstack/tests/DwarfSectionImplTest.cpp
index c340291..414f2f2 100644
--- a/libunwindstack/tests/DwarfSectionImplTest.cpp
+++ b/libunwindstack/tests/DwarfSectionImplTest.cpp
@@ -36,7 +36,7 @@
   MockDwarfSectionImpl(Memory* memory) : DwarfSectionImpl<TypeParam>(memory) {}
   virtual ~MockDwarfSectionImpl() = default;
 
-  MOCK_METHOD2(Init, bool(uint64_t, uint64_t));
+  MOCK_METHOD3(Init, bool(uint64_t, uint64_t, uint64_t));
 
   MOCK_METHOD2(GetFdeOffsetFromPc, bool(uint64_t, uint64_t*));
 
@@ -884,7 +884,7 @@
 
   this->memory_.SetMemory(0x5000, std::vector<uint8_t>{0x00});
   this->memory_.SetMemory(0x6000, std::vector<uint8_t>{0xc2});
-  ASSERT_TRUE(this->section_->Log(2, 0x1000, 0x1000, &fde));
+  ASSERT_TRUE(this->section_->Log(2, 0x1000, &fde));
 
   ASSERT_EQ(
       "4 unwind     DW_CFA_nop\n"
diff --git a/libunwindstack/tests/DwarfSectionTest.cpp b/libunwindstack/tests/DwarfSectionTest.cpp
index 071d2df..2c6c879 100644
--- a/libunwindstack/tests/DwarfSectionTest.cpp
+++ b/libunwindstack/tests/DwarfSectionTest.cpp
@@ -30,13 +30,13 @@
   MockDwarfSection(Memory* memory) : DwarfSection(memory) {}
   virtual ~MockDwarfSection() = default;
 
-  MOCK_METHOD4(Log, bool(uint8_t, uint64_t, uint64_t, const DwarfFde*));
+  MOCK_METHOD3(Log, bool(uint8_t, uint64_t, const DwarfFde*));
 
   MOCK_METHOD5(Eval, bool(const DwarfCie*, Memory*, const dwarf_loc_regs_t&, Regs*, bool*));
 
   MOCK_METHOD3(GetCfaLocationInfo, bool(uint64_t, const DwarfFde*, dwarf_loc_regs_t*));
 
-  MOCK_METHOD2(Init, bool(uint64_t, uint64_t));
+  MOCK_METHOD3(Init, bool(uint64_t, uint64_t, uint64_t));
 
   MOCK_METHOD2(GetFdeOffsetFromPc, bool(uint64_t, uint64_t*));
 
diff --git a/libunwindstack/tests/ElfFake.cpp b/libunwindstack/tests/ElfFake.cpp
index 66207db..3d5ddd6 100644
--- a/libunwindstack/tests/ElfFake.cpp
+++ b/libunwindstack/tests/ElfFake.cpp
@@ -32,7 +32,7 @@
 std::deque<FunctionData> ElfInterfaceFake::functions_;
 std::deque<StepData> ElfInterfaceFake::steps_;
 
-bool ElfInterfaceFake::GetFunctionName(uint64_t, uint64_t, std::string* name, uint64_t* offset) {
+bool ElfInterfaceFake::GetFunctionName(uint64_t, std::string* name, uint64_t* offset) {
   if (functions_.empty()) {
     return false;
   }
@@ -52,7 +52,7 @@
   return true;
 }
 
-bool ElfInterfaceFake::Step(uint64_t, uint64_t, Regs* regs, Memory*, bool* finished) {
+bool ElfInterfaceFake::Step(uint64_t, Regs* regs, Memory*, bool* finished) {
   if (steps_.empty()) {
     return false;
   }
diff --git a/libunwindstack/tests/ElfFake.h b/libunwindstack/tests/ElfFake.h
index e232986..a3bf5ce 100644
--- a/libunwindstack/tests/ElfFake.h
+++ b/libunwindstack/tests/ElfFake.h
@@ -67,13 +67,13 @@
   virtual ~ElfInterfaceFake() = default;
 
   bool Init(uint64_t*) override { return false; }
-  void InitHeaders() override {}
+  void InitHeaders(uint64_t) override {}
   bool GetSoname(std::string*) override { return false; }
 
-  bool GetFunctionName(uint64_t, uint64_t, std::string*, uint64_t*) override;
+  bool GetFunctionName(uint64_t, std::string*, uint64_t*) override;
   bool GetGlobalVariable(const std::string&, uint64_t*) override;
 
-  bool Step(uint64_t, uint64_t, Regs*, Memory*, bool*) override;
+  bool Step(uint64_t, Regs*, Memory*, bool*) override;
 
   void FakeSetGlobalVariable(const std::string& global, uint64_t offset) {
     globals_[global] = offset;
diff --git a/libunwindstack/tests/ElfInterfaceArmTest.cpp b/libunwindstack/tests/ElfInterfaceArmTest.cpp
index 70a52ad..5f1c2ac 100644
--- a/libunwindstack/tests/ElfInterfaceArmTest.cpp
+++ b/libunwindstack/tests/ElfInterfaceArmTest.cpp
@@ -302,7 +302,7 @@
 
   // FindEntry fails.
   bool finished;
-  ASSERT_FALSE(interface.StepExidx(0x7000, 0, nullptr, nullptr, &finished));
+  ASSERT_FALSE(interface.StepExidx(0x7000, nullptr, nullptr, &finished));
   EXPECT_EQ(ERROR_UNWIND_INFO, interface.LastErrorCode());
 
   // ExtractEntry should fail.
@@ -316,18 +316,18 @@
   regs[ARM_REG_LR] = 0x20000;
   regs.set_sp(regs[ARM_REG_SP]);
   regs.set_pc(0x1234);
-  ASSERT_FALSE(interface.StepExidx(0x7000, 0, &regs, &process_memory_, &finished));
+  ASSERT_FALSE(interface.StepExidx(0x7000, &regs, &process_memory_, &finished));
   EXPECT_EQ(ERROR_MEMORY_INVALID, interface.LastErrorCode());
   EXPECT_EQ(0x1004U, interface.LastErrorAddress());
 
   // Eval should fail.
   memory_.SetData32(0x1004, 0x81000000);
-  ASSERT_FALSE(interface.StepExidx(0x7000, 0, &regs, &process_memory_, &finished));
+  ASSERT_FALSE(interface.StepExidx(0x7000, &regs, &process_memory_, &finished));
   EXPECT_EQ(ERROR_UNWIND_INFO, interface.LastErrorCode());
 
   // Everything should pass.
   memory_.SetData32(0x1004, 0x80b0b0b0);
-  ASSERT_TRUE(interface.StepExidx(0x7000, 0, &regs, &process_memory_, &finished));
+  ASSERT_TRUE(interface.StepExidx(0x7000, &regs, &process_memory_, &finished));
   EXPECT_EQ(ERROR_UNWIND_INFO, interface.LastErrorCode());
   ASSERT_FALSE(finished);
   ASSERT_EQ(0x1000U, regs.sp());
@@ -336,11 +336,13 @@
   ASSERT_EQ(0x20000U, regs[ARM_REG_PC]);
 
   // Load bias is non-zero.
-  ASSERT_TRUE(interface.StepExidx(0x8000, 0x1000, &regs, &process_memory_, &finished));
+  interface.set_load_bias(0x1000);
+  ASSERT_TRUE(interface.StepExidx(0x8000, &regs, &process_memory_, &finished));
   EXPECT_EQ(ERROR_UNWIND_INFO, interface.LastErrorCode());
 
   // Pc too small.
-  ASSERT_FALSE(interface.StepExidx(0x8000, 0x9000, &regs, &process_memory_, &finished));
+  interface.set_load_bias(0x9000);
+  ASSERT_FALSE(interface.StepExidx(0x8000, &regs, &process_memory_, &finished));
   EXPECT_EQ(ERROR_UNWIND_INFO, interface.LastErrorCode());
 }
 
@@ -362,7 +364,7 @@
 
   // Everything should pass.
   bool finished;
-  ASSERT_TRUE(interface.StepExidx(0x7000, 0, &regs, &process_memory_, &finished));
+  ASSERT_TRUE(interface.StepExidx(0x7000, &regs, &process_memory_, &finished));
   EXPECT_EQ(ERROR_NONE, interface.LastErrorCode());
   ASSERT_FALSE(finished);
   ASSERT_EQ(0x10004U, regs.sp());
@@ -386,7 +388,7 @@
   regs.set_pc(0x1234);
 
   bool finished;
-  ASSERT_TRUE(interface.StepExidx(0x7000, 0, &regs, &process_memory_, &finished));
+  ASSERT_TRUE(interface.StepExidx(0x7000, &regs, &process_memory_, &finished));
   EXPECT_EQ(ERROR_NONE, interface.LastErrorCode());
   ASSERT_TRUE(finished);
   ASSERT_EQ(0x10000U, regs.sp());
@@ -409,7 +411,7 @@
   regs.set_pc(0x1234);
 
   bool finished;
-  ASSERT_TRUE(interface.StepExidx(0x7000, 0, &regs, &process_memory_, &finished));
+  ASSERT_TRUE(interface.StepExidx(0x7000, &regs, &process_memory_, &finished));
   EXPECT_EQ(ERROR_NONE, interface.LastErrorCode());
   ASSERT_TRUE(finished);
   ASSERT_EQ(0x10000U, regs.sp());
@@ -436,7 +438,7 @@
   regs.set_pc(0x1234);
 
   bool finished;
-  ASSERT_TRUE(interface.StepExidx(0x7000, 0, &regs, &process_memory_, &finished));
+  ASSERT_TRUE(interface.StepExidx(0x7000, &regs, &process_memory_, &finished));
   EXPECT_EQ(ERROR_NONE, interface.LastErrorCode());
   ASSERT_TRUE(finished);
   ASSERT_EQ(0U, regs.pc());
@@ -449,7 +451,7 @@
   regs.set_sp(regs[ARM_REG_SP]);
   regs.set_pc(0x1234);
 
-  ASSERT_TRUE(interface.StepExidx(0x7000, 0, &regs, &process_memory_, &finished));
+  ASSERT_TRUE(interface.StepExidx(0x7000, &regs, &process_memory_, &finished));
   EXPECT_EQ(ERROR_NONE, interface.LastErrorCode());
   ASSERT_TRUE(finished);
   ASSERT_EQ(0U, regs.pc());
diff --git a/libunwindstack/tests/ElfInterfaceTest.cpp b/libunwindstack/tests/ElfInterfaceTest.cpp
index bf97e30..4008e9b 100644
--- a/libunwindstack/tests/ElfInterfaceTest.cpp
+++ b/libunwindstack/tests/ElfInterfaceTest.cpp
@@ -647,7 +647,7 @@
   memory_.SetData32(0x10004, 0x500);
   memory_.SetData32(0x10008, 250);
 
-  elf.InitHeaders();
+  elf.InitHeaders(0);
 
   EXPECT_FALSE(elf.eh_frame() == nullptr);
   EXPECT_TRUE(elf.debug_frame() == nullptr);
@@ -680,7 +680,7 @@
   memory_.SetData32(0x5108, 0x1500);
   memory_.SetData32(0x510c, 0x200);
 
-  elf.InitHeaders();
+  elf.InitHeaders(0);
 
   EXPECT_TRUE(elf.eh_frame() == nullptr);
   EXPECT_FALSE(elf.debug_frame() == nullptr);
@@ -703,7 +703,7 @@
   elf.FakeSetDebugFrameOffset(0);
   elf.FakeSetDebugFrameSize(0);
 
-  elf.InitHeaders();
+  elf.InitHeaders(0);
 
   EXPECT_TRUE(elf.eh_frame() == nullptr);
   EXPECT_EQ(0U, elf.eh_frame_offset());
@@ -728,7 +728,7 @@
   elf.FakeSetDebugFrameOffset(0x1000);
   elf.FakeSetDebugFrameSize(0x100);
 
-  elf.InitHeaders();
+  elf.InitHeaders(0);
 
   EXPECT_TRUE(elf.eh_frame() == nullptr);
   EXPECT_TRUE(elf.debug_frame() == nullptr);
@@ -833,10 +833,10 @@
   // Look in the first symbol table.
   std::string name;
   uint64_t name_offset;
-  ASSERT_TRUE(elf->GetFunctionName(0x90010, 0, &name, &name_offset));
+  ASSERT_TRUE(elf->GetFunctionName(0x90010, &name, &name_offset));
   EXPECT_EQ("function_one", name);
   EXPECT_EQ(16U, name_offset);
-  ASSERT_TRUE(elf->GetFunctionName(0xd0020, 0, &name, &name_offset));
+  ASSERT_TRUE(elf->GetFunctionName(0xd0020, &name, &name_offset));
   EXPECT_EQ("function_two", name);
   EXPECT_EQ(32U, name_offset);
 }
@@ -1065,7 +1065,7 @@
 
   uint64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  elf->InitHeaders();
+  elf->InitHeaders(0);
   EXPECT_EQ(0U, load_bias);
   EXPECT_FALSE(elf->IsValidPc(0));
   EXPECT_FALSE(elf->IsValidPc(0x20ff));
@@ -1128,7 +1128,7 @@
 
   uint64_t load_bias = 0;
   ASSERT_TRUE(elf->Init(&load_bias));
-  elf->InitHeaders();
+  elf->InitHeaders(0);
   EXPECT_EQ(0U, load_bias);
   EXPECT_FALSE(elf->IsValidPc(0));
   EXPECT_FALSE(elf->IsValidPc(0x27ff));
diff --git a/libunwindstack/tests/ElfTest.cpp b/libunwindstack/tests/ElfTest.cpp
index aecbf6d..55fe16f 100644
--- a/libunwindstack/tests/ElfTest.cpp
+++ b/libunwindstack/tests/ElfTest.cpp
@@ -297,16 +297,11 @@
   elf.FakeSetInterface(interface);
 
   elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0);
   MapInfo map_info(0x1000, 0x2000);
 
   ASSERT_EQ(0x101U, elf.GetRelPc(0x1101, &map_info));
 
-  elf.FakeSetLoadBias(0x3000);
-  ASSERT_EQ(0x3101U, elf.GetRelPc(0x1101, &map_info));
-
   elf.FakeSetValid(false);
-  elf.FakeSetLoadBias(0);
   ASSERT_EQ(0x101U, elf.GetRelPc(0x1101, &map_info));
 }
 
@@ -328,7 +323,6 @@
   }
 
   elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0);
   bool finished;
   ASSERT_TRUE(elf.Step(0x3000, 0x1000, &regs, &process_memory, &finished));
   EXPECT_FALSE(finished);
@@ -342,11 +336,11 @@
   virtual ~ElfInterfaceMock() = default;
 
   bool Init(uint64_t*) override { return false; }
-  void InitHeaders() override {}
+  void InitHeaders(uint64_t) override {}
   bool GetSoname(std::string*) override { return false; }
-  bool GetFunctionName(uint64_t, uint64_t, std::string*, uint64_t*) override { return false; }
+  bool GetFunctionName(uint64_t, std::string*, uint64_t*) override { return false; }
 
-  MOCK_METHOD5(Step, bool(uint64_t, uint64_t, Regs*, Memory*, bool*));
+  MOCK_METHOD4(Step, bool(uint64_t, Regs*, Memory*, bool*));
   MOCK_METHOD2(GetGlobalVariable, bool(const std::string&, uint64_t*));
   MOCK_METHOD1(IsValidPc, bool(uint64_t));
 
@@ -358,7 +352,6 @@
 TEST_F(ElfTest, step_in_interface) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0);
 
   RegsArm regs;
 
@@ -367,30 +360,12 @@
   MemoryFake process_memory;
 
   bool finished;
-  EXPECT_CALL(*interface, Step(0x1000, 0, &regs, &process_memory, &finished))
+  EXPECT_CALL(*interface, Step(0x1000, &regs, &process_memory, &finished))
       .WillOnce(::testing::Return(true));
 
   ASSERT_TRUE(elf.Step(0x1004, 0x1000, &regs, &process_memory, &finished));
 }
 
-TEST_F(ElfTest, step_in_interface_non_zero_load_bias) {
-  ElfFake elf(memory_);
-  elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0x4000);
-
-  RegsArm regs;
-
-  ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
-  elf.FakeSetInterface(interface);
-  MemoryFake process_memory;
-
-  bool finished;
-  EXPECT_CALL(*interface, Step(0x7300, 0x4000, &regs, &process_memory, &finished))
-      .WillOnce(::testing::Return(true));
-
-  ASSERT_TRUE(elf.Step(0x7304, 0x7300, &regs, &process_memory, &finished));
-}
-
 TEST_F(ElfTest, get_global_invalid_elf) {
   ElfFake elf(memory_);
   elf.FakeSetValid(false);
@@ -403,7 +378,6 @@
 TEST_F(ElfTest, get_global_valid_not_in_interface) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0);
 
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
@@ -431,10 +405,26 @@
   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);
+}
+
 TEST_F(ElfTest, get_global_valid_dynamic_zero) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0);
 
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
@@ -456,7 +446,6 @@
 TEST_F(ElfTest, get_global_valid_in_gnu_debugdata_dynamic_zero) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0);
 
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
@@ -470,27 +459,9 @@
   EXPECT_EQ(0x300U, 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);
-}
-
 TEST_F(ElfTest, get_global_valid_dynamic_adjust_negative) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0);
 
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   interface->MockSetDynamicOffset(0x400);
@@ -510,7 +481,6 @@
 TEST_F(ElfTest, get_global_valid_dynamic_adjust_positive) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0);
 
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   interface->MockSetDynamicOffset(0x1000);
@@ -530,7 +500,6 @@
 TEST_F(ElfTest, is_valid_pc_elf_invalid) {
   ElfFake elf(memory_);
   elf.FakeSetValid(false);
-  elf.FakeSetLoadBias(0);
 
   EXPECT_FALSE(elf.IsValidPc(0x100));
   EXPECT_FALSE(elf.IsValidPc(0x200));
@@ -539,7 +508,6 @@
 TEST_F(ElfTest, is_valid_pc_interface) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0);
 
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
@@ -549,25 +517,9 @@
   EXPECT_TRUE(elf.IsValidPc(0x1500));
 }
 
-TEST_F(ElfTest, is_valid_pc_non_zero_load_bias) {
-  ElfFake elf(memory_);
-  elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0x1000);
-
-  ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
-  elf.FakeSetInterface(interface);
-
-  EXPECT_CALL(*interface, IsValidPc(0x500)).WillOnce(::testing::Return(true));
-
-  EXPECT_FALSE(elf.IsValidPc(0x100));
-  EXPECT_FALSE(elf.IsValidPc(0x200));
-  EXPECT_TRUE(elf.IsValidPc(0x1500));
-}
-
 TEST_F(ElfTest, is_valid_pc_from_gnu_debugdata) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0);
 
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
diff --git a/libunwindstack/tests/LocalUnwinderTest.cpp b/libunwindstack/tests/LocalUnwinderTest.cpp
new file mode 100644
index 0000000..56a18cd
--- /dev/null
+++ b/libunwindstack/tests/LocalUnwinderTest.cpp
@@ -0,0 +1,207 @@
+/*
+ * 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 <dlfcn.h>
+#include <inttypes.h>
+#include <signal.h>
+#include <stdint.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include <gtest/gtest.h>
+
+#include <android-base/stringprintf.h>
+
+#include <unwindstack/LocalUnwinder.h>
+
+namespace unwindstack {
+
+static std::vector<LocalFrameData>* g_frame_info;
+static LocalUnwinder* g_unwinder;
+
+extern "C" void SignalLocalInnerFunction() {
+  g_unwinder->Unwind(g_frame_info, 256);
+}
+
+extern "C" void SignalLocalMiddleFunction() {
+  SignalLocalInnerFunction();
+}
+
+extern "C" void SignalLocalOuterFunction() {
+  SignalLocalMiddleFunction();
+}
+
+static void SignalLocalCallerHandler(int, siginfo_t*, void*) {
+  SignalLocalOuterFunction();
+}
+
+static std::string ErrorMsg(const std::vector<const char*>& function_names,
+                            const std::vector<LocalFrameData>& frame_info) {
+  std::string unwind;
+  size_t i = 0;
+  for (const auto& frame : frame_info) {
+    unwind += android::base::StringPrintf("#%02zu pc 0x%" PRIx64 " rel_pc 0x%" PRIx64, i++,
+                                          frame.pc, frame.rel_pc);
+    if (frame.map_info != nullptr) {
+      if (!frame.map_info->name.empty()) {
+        unwind += " " + frame.map_info->name;
+      } else {
+        unwind += android::base::StringPrintf(" 0x%" PRIx64 "-0x%" PRIx64, frame.map_info->start,
+                                              frame.map_info->end);
+      }
+      if (frame.map_info->offset != 0) {
+        unwind += android::base::StringPrintf(" offset 0x%" PRIx64, frame.map_info->offset);
+      }
+    }
+    if (!frame.function_name.empty()) {
+      unwind += " " + frame.function_name;
+      if (frame.function_offset != 0) {
+        unwind += android::base::StringPrintf("+%" PRId64, frame.function_offset);
+      }
+    }
+    unwind += '\n';
+  }
+
+  return std::string(
+             "Unwind completed without finding all frames\n"
+             "  Looking for function: ") +
+         function_names.front() + "\n" + "Unwind data:\n" + unwind;
+}
+
+// This test assumes that this code is compiled with optimizations turned
+// off. If this doesn't happen, then all of the calls will be optimized
+// away.
+extern "C" void LocalInnerFunction(LocalUnwinder* unwinder, bool unwind_through_signal) {
+  std::vector<LocalFrameData> frame_info;
+  g_frame_info = &frame_info;
+  g_unwinder = unwinder;
+  std::vector<const char*> expected_function_names;
+
+  if (unwind_through_signal) {
+    struct sigaction act, oldact;
+    memset(&act, 0, sizeof(act));
+    act.sa_sigaction = SignalLocalCallerHandler;
+    act.sa_flags = SA_RESTART | SA_ONSTACK;
+    ASSERT_EQ(0, sigaction(SIGUSR1, &act, &oldact));
+
+    raise(SIGUSR1);
+
+    ASSERT_EQ(0, sigaction(SIGUSR1, &oldact, nullptr));
+
+    expected_function_names = {"LocalOuterFunction",        "LocalMiddleFunction",
+                               "LocalInnerFunction",        "SignalLocalOuterFunction",
+                               "SignalLocalMiddleFunction", "SignalLocalInnerFunction"};
+  } else {
+    ASSERT_TRUE(unwinder->Unwind(&frame_info, 256));
+
+    expected_function_names = {"LocalOuterFunction", "LocalMiddleFunction", "LocalInnerFunction"};
+  }
+
+  for (auto& frame : frame_info) {
+    if (frame.function_name == expected_function_names.back()) {
+      expected_function_names.pop_back();
+      if (expected_function_names.empty()) {
+        break;
+      }
+    }
+  }
+
+  ASSERT_TRUE(expected_function_names.empty()) << ErrorMsg(expected_function_names, frame_info);
+}
+
+extern "C" void LocalMiddleFunction(LocalUnwinder* unwinder, bool unwind_through_signal) {
+  LocalInnerFunction(unwinder, unwind_through_signal);
+}
+
+extern "C" void LocalOuterFunction(LocalUnwinder* unwinder, bool unwind_through_signal) {
+  LocalMiddleFunction(unwinder, unwind_through_signal);
+}
+
+class LocalUnwinderTest : public ::testing::Test {
+ protected:
+  void SetUp() override {
+    unwinder_.reset(new LocalUnwinder);
+    ASSERT_TRUE(unwinder_->Init());
+  }
+
+  std::unique_ptr<LocalUnwinder> unwinder_;
+};
+
+TEST_F(LocalUnwinderTest, local) {
+  LocalOuterFunction(unwinder_.get(), false);
+}
+
+TEST_F(LocalUnwinderTest, local_signal) {
+  LocalOuterFunction(unwinder_.get(), true);
+}
+
+TEST_F(LocalUnwinderTest, local_multiple) {
+  ASSERT_NO_FATAL_FAILURE(LocalOuterFunction(unwinder_.get(), false));
+
+  ASSERT_NO_FATAL_FAILURE(LocalOuterFunction(unwinder_.get(), true));
+
+  ASSERT_NO_FATAL_FAILURE(LocalOuterFunction(unwinder_.get(), false));
+
+  ASSERT_NO_FATAL_FAILURE(LocalOuterFunction(unwinder_.get(), true));
+}
+
+// This test verifies that doing an unwind before and after a dlopen
+// works. It's verifying that the maps read during the first unwind
+// do not cause a problem when doing the unwind using the code in
+// the dlopen'd code.
+TEST_F(LocalUnwinderTest, unwind_after_dlopen) {
+  // Prime the maps data.
+  ASSERT_NO_FATAL_FAILURE(LocalOuterFunction(unwinder_.get(), false));
+
+  std::string testlib(testing::internal::GetArgvs()[0]);
+  auto const value = testlib.find_last_of('/');
+  if (value == std::string::npos) {
+    testlib = "../";
+  } else {
+    testlib = testlib.substr(0, value + 1) + "../";
+  }
+  testlib += "libunwindstack_local.so";
+
+  void* handle = dlopen(testlib.c_str(), RTLD_NOW);
+  ASSERT_TRUE(handle != nullptr);
+
+  void (*unwind_function)(void*, void*) =
+      reinterpret_cast<void (*)(void*, void*)>(dlsym(handle, "TestlibLevel1"));
+  ASSERT_TRUE(unwind_function != nullptr);
+
+  std::vector<LocalFrameData> frame_info;
+  unwind_function(unwinder_.get(), &frame_info);
+
+  ASSERT_EQ(0, dlclose(handle));
+
+  std::vector<const char*> expected_function_names{"TestlibLevel1", "TestlibLevel2",
+                                                   "TestlibLevel3", "TestlibLevel4"};
+
+  for (auto& frame : frame_info) {
+    if (frame.function_name == expected_function_names.back()) {
+      expected_function_names.pop_back();
+      if (expected_function_names.empty()) {
+        break;
+      }
+    }
+  }
+
+  ASSERT_TRUE(expected_function_names.empty()) << ErrorMsg(expected_function_names, frame_info);
+}
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/SymbolsTest.cpp b/libunwindstack/tests/SymbolsTest.cpp
index 45a7b58..b40a253 100644
--- a/libunwindstack/tests/SymbolsTest.cpp
+++ b/libunwindstack/tests/SymbolsTest.cpp
@@ -70,18 +70,18 @@
 
   std::string name;
   uint64_t func_offset;
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0x5000, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0x5000, &this->memory_, &name, &func_offset));
   ASSERT_EQ("fake_function", name);
   ASSERT_EQ(0U, func_offset);
 
   name.clear();
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0x500f, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0x500f, &this->memory_, &name, &func_offset));
   ASSERT_EQ("fake_function", name);
   ASSERT_EQ(0xfU, func_offset);
 
   // Check one before and one after the function.
-  ASSERT_FALSE(symbols.GetName<TypeParam>(0x4fff, 0, &this->memory_, &name, &func_offset));
-  ASSERT_FALSE(symbols.GetName<TypeParam>(0x5010, 0, &this->memory_, &name, &func_offset));
+  ASSERT_FALSE(symbols.GetName<TypeParam>(0x4fff, &this->memory_, &name, &func_offset));
+  ASSERT_FALSE(symbols.GetName<TypeParam>(0x5010, &this->memory_, &name, &func_offset));
 }
 
 TYPED_TEST_P(SymbolsTest, no_symbol) {
@@ -98,7 +98,7 @@
   // First verify that we can get the name.
   std::string name;
   uint64_t func_offset;
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0x5000, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0x5000, &this->memory_, &name, &func_offset));
   ASSERT_EQ("fake_function", name);
   ASSERT_EQ(0U, func_offset);
 
@@ -107,7 +107,7 @@
   this->memory_.SetMemory(offset, &sym, sizeof(sym));
   // Clear the cache to force the symbol data to be re-read.
   symbols.ClearCache();
-  ASSERT_FALSE(symbols.GetName<TypeParam>(0x5000, 0, &this->memory_, &name, &func_offset));
+  ASSERT_FALSE(symbols.GetName<TypeParam>(0x5000, &this->memory_, &name, &func_offset));
 
   // Set the function back, and set the shndx to UNDEF.
   sym.st_info = STT_FUNC;
@@ -115,7 +115,7 @@
   this->memory_.SetMemory(offset, &sym, sizeof(sym));
   // Clear the cache to force the symbol data to be re-read.
   symbols.ClearCache();
-  ASSERT_FALSE(symbols.GetName<TypeParam>(0x5000, 0, &this->memory_, &name, &func_offset));
+  ASSERT_FALSE(symbols.GetName<TypeParam>(0x5000, &this->memory_, &name, &func_offset));
 }
 
 TYPED_TEST_P(SymbolsTest, multiple_entries) {
@@ -144,34 +144,34 @@
 
   std::string name;
   uint64_t func_offset;
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0x3005, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0x3005, &this->memory_, &name, &func_offset));
   ASSERT_EQ("function_two", name);
   ASSERT_EQ(1U, func_offset);
 
   name.clear();
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0x5004, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0x5004, &this->memory_, &name, &func_offset));
   ASSERT_EQ("function_one", name);
   ASSERT_EQ(4U, func_offset);
 
   name.clear();
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0xa011, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0xa011, &this->memory_, &name, &func_offset));
   ASSERT_EQ("function_three", name);
   ASSERT_EQ(1U, func_offset);
 
   // Reget some of the others to verify getting one function name doesn't
   // affect any of the next calls.
   name.clear();
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0x5008, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0x5008, &this->memory_, &name, &func_offset));
   ASSERT_EQ("function_one", name);
   ASSERT_EQ(8U, func_offset);
 
   name.clear();
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0x3008, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0x3008, &this->memory_, &name, &func_offset));
   ASSERT_EQ("function_two", name);
   ASSERT_EQ(4U, func_offset);
 
   name.clear();
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0xa01a, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0xa01a, &this->memory_, &name, &func_offset));
   ASSERT_EQ("function_three", name);
   ASSERT_EQ(0xaU, func_offset);
 }
@@ -203,47 +203,21 @@
 
   std::string name;
   uint64_t func_offset;
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0x3005, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0x3005, &this->memory_, &name, &func_offset));
   ASSERT_EQ("function_two", name);
   ASSERT_EQ(1U, func_offset);
 
   name.clear();
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0x5004, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0x5004, &this->memory_, &name, &func_offset));
   ASSERT_EQ("function_one", name);
   ASSERT_EQ(4U, func_offset);
 
   name.clear();
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0xa011, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0xa011, &this->memory_, &name, &func_offset));
   ASSERT_EQ("function_three", name);
   ASSERT_EQ(1U, func_offset);
 }
 
-TYPED_TEST_P(SymbolsTest, load_bias) {
-  Symbols symbols(0x1000, sizeof(TypeParam), sizeof(TypeParam), 0x2000, 0x100);
-
-  TypeParam sym;
-  this->InitSym(&sym, 0x5000, 0x10, 0x40);
-  uint64_t offset = 0x1000;
-  this->memory_.SetMemory(offset, &sym, sizeof(sym));
-
-  std::string fake_name("fake_function");
-  this->memory_.SetMemory(0x2040, fake_name.c_str(), fake_name.size() + 1);
-
-  // Set a non-zero load_bias that should be a valid function offset.
-  std::string name;
-  uint64_t func_offset;
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0x5004, 0x1000, &this->memory_, &name, &func_offset));
-  ASSERT_EQ("fake_function", name);
-  ASSERT_EQ(4U, func_offset);
-
-  // Set a flag that should cause the load_bias to be ignored.
-  sym.st_shndx = SHN_ABS;
-  this->memory_.SetMemory(offset, &sym, sizeof(sym));
-  // Clear the cache to force the symbol data to be re-read.
-  symbols.ClearCache();
-  ASSERT_FALSE(symbols.GetName<TypeParam>(0x5004, 0x1000, &this->memory_, &name, &func_offset));
-}
-
 TYPED_TEST_P(SymbolsTest, symtab_value_out_of_bounds) {
   Symbols symbols_end_at_100(0x1000, sizeof(TypeParam) * 2, sizeof(TypeParam), 0x2000, 0x100);
   Symbols symbols_end_at_200(0x1000, sizeof(TypeParam) * 2, sizeof(TypeParam), 0x2000, 0x200);
@@ -265,18 +239,16 @@
   std::string name;
   uint64_t func_offset;
   // Verify that we can get the function name properly for both entries.
-  ASSERT_TRUE(symbols_end_at_200.GetName<TypeParam>(0x5000, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols_end_at_200.GetName<TypeParam>(0x5000, &this->memory_, &name, &func_offset));
   ASSERT_EQ("fake_function", name);
   ASSERT_EQ(0U, func_offset);
-  ASSERT_TRUE(symbols_end_at_200.GetName<TypeParam>(0x3000, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols_end_at_200.GetName<TypeParam>(0x3000, &this->memory_, &name, &func_offset));
   ASSERT_EQ("function", name);
   ASSERT_EQ(0U, func_offset);
 
   // Now use the symbol table that ends at 0x100.
-  ASSERT_FALSE(
-      symbols_end_at_100.GetName<TypeParam>(0x5000, 0, &this->memory_, &name, &func_offset));
-  ASSERT_FALSE(
-      symbols_end_at_100.GetName<TypeParam>(0x3000, 0, &this->memory_, &name, &func_offset));
+  ASSERT_FALSE(symbols_end_at_100.GetName<TypeParam>(0x5000, &this->memory_, &name, &func_offset));
+  ASSERT_FALSE(symbols_end_at_100.GetName<TypeParam>(0x3000, &this->memory_, &name, &func_offset));
 }
 
 // Verify the entire func table is cached.
@@ -302,9 +274,9 @@
   // Do call that should cache all of the entries (except the string data).
   std::string name;
   uint64_t func_offset;
-  ASSERT_FALSE(symbols.GetName<TypeParam>(0x6000, 0, &this->memory_, &name, &func_offset));
+  ASSERT_FALSE(symbols.GetName<TypeParam>(0x6000, &this->memory_, &name, &func_offset));
   this->memory_.Clear();
-  ASSERT_FALSE(symbols.GetName<TypeParam>(0x6000, 0, &this->memory_, &name, &func_offset));
+  ASSERT_FALSE(symbols.GetName<TypeParam>(0x6000, &this->memory_, &name, &func_offset));
 
   // Clear the memory and only put the symbol data string data in memory.
   this->memory_.Clear();
@@ -317,15 +289,15 @@
   fake_name = "third_entry";
   this->memory_.SetMemory(0xa300, fake_name.c_str(), fake_name.size() + 1);
 
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0x5001, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0x5001, &this->memory_, &name, &func_offset));
   ASSERT_EQ("first_entry", name);
   ASSERT_EQ(1U, func_offset);
 
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0x2002, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0x2002, &this->memory_, &name, &func_offset));
   ASSERT_EQ("second_entry", name);
   ASSERT_EQ(2U, func_offset);
 
-  ASSERT_TRUE(symbols.GetName<TypeParam>(0x1003, 0, &this->memory_, &name, &func_offset));
+  ASSERT_TRUE(symbols.GetName<TypeParam>(0x1003, &this->memory_, &name, &func_offset));
   ASSERT_EQ("third_entry", name);
   ASSERT_EQ(3U, func_offset);
 }
@@ -381,17 +353,17 @@
   EXPECT_FALSE(symbols.GetGlobal<TypeParam>(&this->memory_, "function_1", &offset));
 
   std::string name;
-  EXPECT_TRUE(symbols.GetName<TypeParam>(0x10002, 0, &this->memory_, &name, &offset));
+  EXPECT_TRUE(symbols.GetName<TypeParam>(0x10002, &this->memory_, &name, &offset));
   EXPECT_EQ("function_0", name);
   EXPECT_EQ(2U, offset);
 
-  EXPECT_TRUE(symbols.GetName<TypeParam>(0x12004, 0, &this->memory_, &name, &offset));
+  EXPECT_TRUE(symbols.GetName<TypeParam>(0x12004, &this->memory_, &name, &offset));
   EXPECT_EQ("function_1", name);
   EXPECT_EQ(4U, offset);
 }
 
 REGISTER_TYPED_TEST_CASE_P(SymbolsTest, function_bounds_check, no_symbol, multiple_entries,
-                           multiple_entries_nonstandard_size, load_bias, symtab_value_out_of_bounds,
+                           multiple_entries_nonstandard_size, symtab_value_out_of_bounds,
                            symtab_read_cached, get_global);
 
 typedef ::testing::Types<Elf32_Sym, Elf64_Sym> SymbolsTestTypes;
diff --git a/libunwindstack/tests/TestLocal.cpp b/libunwindstack/tests/TestLocal.cpp
new file mode 100644
index 0000000..fa0baff
--- /dev/null
+++ b/libunwindstack/tests/TestLocal.cpp
@@ -0,0 +1,39 @@
+/*
+ * 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 <unwindstack/LocalUnwinder.h>
+
+#include <vector>
+
+extern "C" void TestlibLevel4(void* unwinder_data, void* frame_data) {
+  unwindstack::LocalUnwinder* unwinder =
+      reinterpret_cast<unwindstack::LocalUnwinder*>(unwinder_data);
+  std::vector<unwindstack::LocalFrameData>* frame_info =
+      reinterpret_cast<std::vector<unwindstack::LocalFrameData>*>(frame_data);
+  unwinder->Unwind(frame_info, 256);
+}
+
+extern "C" void TestlibLevel3(void* unwinder_data, void* frame_data) {
+  TestlibLevel4(unwinder_data, frame_data);
+}
+
+extern "C" void TestlibLevel2(void* unwinder_data, void* frame_data) {
+  TestlibLevel3(unwinder_data, frame_data);
+}
+
+extern "C" void TestlibLevel1(void* unwinder_data, void* frame_data) {
+  TestlibLevel2(unwinder_data, frame_data);
+}
diff --git a/libunwindstack/tests/UnwindOfflineTest.cpp b/libunwindstack/tests/UnwindOfflineTest.cpp
index a187dc3..a65c077 100644
--- a/libunwindstack/tests/UnwindOfflineTest.cpp
+++ b/libunwindstack/tests/UnwindOfflineTest.cpp
@@ -18,6 +18,7 @@
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/mman.h>
 #include <unistd.h>
 
 #include <gtest/gtest.h>
@@ -1085,6 +1086,46 @@
   EXPECT_EQ(0xcd4ff960U, unwinder.frames()[24].sp);
 }
 
+TEST_F(UnwindOfflineTest, jit_map_arm) {
+  ASSERT_NO_FATAL_FAILURE(Init("jit_map_arm/", ARCH_ARM));
+
+  maps_->Add(0xd025c788, 0xd025c9f0, 0, PROT_READ | PROT_EXEC | MAPS_FLAGS_JIT_SYMFILE_MAP,
+             "jit_map0.so", 0);
+  maps_->Add(0xd025cd98, 0xd025cff4, 0, PROT_READ | PROT_EXEC | MAPS_FLAGS_JIT_SYMFILE_MAP,
+             "jit_map1.so", 0);
+  maps_->Sort();
+
+  Unwinder unwinder(128, maps_.get(), regs_.get(), process_memory_);
+  unwinder.Unwind();
+
+  std::string frame_info(DumpFrames(unwinder));
+  ASSERT_EQ(6U, unwinder.NumFrames()) << "Unwind:\n" << frame_info;
+  EXPECT_EQ(
+      "  #00 pc 00000000  jit_map0.so "
+      "(com.example.simpleperf.simpleperfexamplewithnative.MixActivity.access$000)\n"
+      "  #01 pc 0000003d  jit_map1.so "
+      "(com.example.simpleperf.simpleperfexamplewithnative.MixActivity$1.run+60)\n"
+      "  #02 pc 004135bb  libart.so (art_quick_osr_stub+42)\n"
+
+      "  #03 pc 003851dd  libart.so (_ZN3art6Thread14CreateCallbackEPv+868)\n"
+      "  #04 pc 00062925  libc.so (_ZL15__pthread_startPv+22)\n"
+      "  #05 pc 0001de39  libc.so (__start_thread+24)\n",
+      frame_info);
+
+  EXPECT_EQ(0xd025c788U, unwinder.frames()[0].pc);
+  EXPECT_EQ(0xcd4ff140U, unwinder.frames()[0].sp);
+  EXPECT_EQ(0xd025cdd5U, unwinder.frames()[1].pc);
+  EXPECT_EQ(0xcd4ff140U, unwinder.frames()[1].sp);
+  EXPECT_EQ(0xe4a755bbU, unwinder.frames()[2].pc);
+  EXPECT_EQ(0xcd4ff160U, unwinder.frames()[2].sp);
+  EXPECT_EQ(0xe49e71ddU, unwinder.frames()[3].pc);
+  EXPECT_EQ(0xcd4ff8e8U, unwinder.frames()[3].sp);
+  EXPECT_EQ(0xe7df3925U, unwinder.frames()[4].pc);
+  EXPECT_EQ(0xcd4ff958U, unwinder.frames()[4].sp);
+  EXPECT_EQ(0xe7daee39U, unwinder.frames()[5].pc);
+  EXPECT_EQ(0xcd4ff960U, unwinder.frames()[5].sp);
+}
+
 TEST_F(UnwindOfflineTest, offset_arm) {
   ASSERT_NO_FATAL_FAILURE(Init("offset_arm/", ARCH_ARM));
 
@@ -1159,4 +1200,43 @@
   EXPECT_EQ(0xffcc1558U, unwinder.frames()[18].sp);
 }
 
+// Test using a non-zero load bias library that has the fde entries
+// encoded as 0xb, which is not set as pc relative.
+TEST_F(UnwindOfflineTest, debug_frame_load_bias_arm) {
+  ASSERT_NO_FATAL_FAILURE(Init("debug_frame_load_bias_arm/", ARCH_ARM));
+
+  Unwinder unwinder(128, maps_.get(), regs_.get(), process_memory_);
+  unwinder.Unwind();
+
+  std::string frame_info(DumpFrames(unwinder));
+  ASSERT_EQ(8U, unwinder.NumFrames()) << "Unwind:\n" << frame_info;
+  EXPECT_EQ(
+      "  #00 pc 0005138c  libc.so (__ioctl+8)\n"
+      "  #01 pc 0002140f  libc.so (ioctl+30)\n"
+      "  #02 pc 00039535  libbinder.so (_ZN7android14IPCThreadState14talkWithDriverEb+204)\n"
+      "  #03 pc 00039633  libbinder.so (_ZN7android14IPCThreadState20getAndExecuteCommandEv+10)\n"
+      "  #04 pc 00039b57  libbinder.so (_ZN7android14IPCThreadState14joinThreadPoolEb+38)\n"
+      "  #05 pc 00000c21  mediaserver (main+104)\n"
+      "  #06 pc 00084b89  libc.so (__libc_init+48)\n"
+      "  #07 pc 00000b77  mediaserver (_start_main+38)\n",
+      frame_info);
+
+  EXPECT_EQ(0xf0be238cU, unwinder.frames()[0].pc);
+  EXPECT_EQ(0xffd4a638U, unwinder.frames()[0].sp);
+  EXPECT_EQ(0xf0bb240fU, unwinder.frames()[1].pc);
+  EXPECT_EQ(0xffd4a638U, unwinder.frames()[1].sp);
+  EXPECT_EQ(0xf1a75535U, unwinder.frames()[2].pc);
+  EXPECT_EQ(0xffd4a650U, unwinder.frames()[2].sp);
+  EXPECT_EQ(0xf1a75633U, unwinder.frames()[3].pc);
+  EXPECT_EQ(0xffd4a6b0U, unwinder.frames()[3].sp);
+  EXPECT_EQ(0xf1a75b57U, unwinder.frames()[4].pc);
+  EXPECT_EQ(0xffd4a6d0U, unwinder.frames()[4].sp);
+  EXPECT_EQ(0x8d1cc21U, unwinder.frames()[5].pc);
+  EXPECT_EQ(0xffd4a6e8U, unwinder.frames()[5].sp);
+  EXPECT_EQ(0xf0c15b89U, unwinder.frames()[6].pc);
+  EXPECT_EQ(0xffd4a700U, unwinder.frames()[6].sp);
+  EXPECT_EQ(0x8d1cb77U, unwinder.frames()[7].pc);
+  EXPECT_EQ(0xffd4a718U, unwinder.frames()[7].sp);
+}
+
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/UnwindTest.cpp b/libunwindstack/tests/UnwindTest.cpp
index 242cc6a..83695bb 100644
--- a/libunwindstack/tests/UnwindTest.cpp
+++ b/libunwindstack/tests/UnwindTest.cpp
@@ -106,15 +106,12 @@
   Unwinder unwinder(512, maps, regs, process_memory);
   unwinder.Unwind();
 
-  std::string expected_function = expected_function_names.back();
-  expected_function_names.pop_back();
   for (auto& frame : unwinder.frames()) {
-    if (frame.function_name == expected_function) {
+    if (frame.function_name == expected_function_names.back()) {
+      expected_function_names.pop_back();
       if (expected_function_names.empty()) {
         break;
       }
-      expected_function = expected_function_names.back();
-      expected_function_names.pop_back();
     }
   }
 
diff --git a/libunwindstack/tests/UnwinderTest.cpp b/libunwindstack/tests/UnwinderTest.cpp
index b38fb5f..2428f68 100644
--- a/libunwindstack/tests/UnwinderTest.cpp
+++ b/libunwindstack/tests/UnwinderTest.cpp
@@ -221,7 +221,7 @@
   EXPECT_EQ(0x10000U, frame->sp);
   EXPECT_EQ("", frame->function_name);
   EXPECT_EQ(0U, frame->function_offset);
-  EXPECT_EQ("/system/fake/libc.so", frame->map_name);
+  EXPECT_EQ("", frame->map_name);
   EXPECT_EQ(0U, frame->map_offset);
   EXPECT_EQ(0x1000U, frame->map_start);
   EXPECT_EQ(0x8000U, frame->map_end);
@@ -235,7 +235,7 @@
   EXPECT_EQ(0x10010U, frame->sp);
   EXPECT_EQ("", frame->function_name);
   EXPECT_EQ(0U, frame->function_offset);
-  EXPECT_EQ("/system/fake/libc.so", frame->map_name);
+  EXPECT_EQ("", frame->map_name);
   EXPECT_EQ(0U, frame->map_offset);
   EXPECT_EQ(0x1000U, frame->map_start);
   EXPECT_EQ(0x8000U, frame->map_end);
@@ -249,7 +249,7 @@
   EXPECT_EQ(0x10020U, frame->sp);
   EXPECT_EQ("", frame->function_name);
   EXPECT_EQ(0U, frame->function_offset);
-  EXPECT_EQ("/system/fake/libc.so", frame->map_name);
+  EXPECT_EQ("", frame->map_name);
   EXPECT_EQ(0U, frame->map_offset);
   EXPECT_EQ(0x1000U, frame->map_start);
   EXPECT_EQ(0x8000U, frame->map_end);
diff --git a/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/libbinder.so b/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/libbinder.so
new file mode 100644
index 0000000..4b7bf44
--- /dev/null
+++ b/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/libbinder.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/libc.so b/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/libc.so
new file mode 100644
index 0000000..013858e
--- /dev/null
+++ b/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/libc.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/maps.txt b/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/maps.txt
new file mode 100644
index 0000000..10f1325
--- /dev/null
+++ b/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/maps.txt
@@ -0,0 +1,3 @@
+8d1c000-8d1f000 r-xp 0 00:00 0   mediaserver
+f0b91000-f0c2c000 r-xp 0 00:00 0   libc.so
+f1a41000-f1a97000 r-xp 0 00:00 0   libbinder.so
diff --git a/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/mediaserver b/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/mediaserver
new file mode 100644
index 0000000..9e4a83f
--- /dev/null
+++ b/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/mediaserver
Binary files differ
diff --git a/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/regs.txt b/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/regs.txt
new file mode 100644
index 0000000..f147247
--- /dev/null
+++ b/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/regs.txt
@@ -0,0 +1,16 @@
+r0: 3
+r1: c0306201
+r2: ffd4a658
+r3: 0
+r4: f0c36d8c
+r5: ffd4a658
+r6: f0168000
+r7: 36
+r8: ffd4a678
+r9: f016802c
+r10: ffd4a660
+r11: 0
+ip: 0
+sp: ffd4a638
+lr: f0bb2413
+pc: f0be238c
diff --git a/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/stack.data b/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/stack.data
new file mode 100644
index 0000000..847c819
--- /dev/null
+++ b/libunwindstack/tests/files/offline/debug_frame_load_bias_arm/stack.data
Binary files differ
diff --git a/libunwindstack/tests/files/offline/jit_map_arm/jit_map0.so b/libunwindstack/tests/files/offline/jit_map_arm/jit_map0.so
new file mode 100644
index 0000000..e667883
--- /dev/null
+++ b/libunwindstack/tests/files/offline/jit_map_arm/jit_map0.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/jit_map_arm/jit_map1.so b/libunwindstack/tests/files/offline/jit_map_arm/jit_map1.so
new file mode 100644
index 0000000..9a1d714
--- /dev/null
+++ b/libunwindstack/tests/files/offline/jit_map_arm/jit_map1.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/jit_map_arm/libart.so b/libunwindstack/tests/files/offline/jit_map_arm/libart.so
new file mode 100644
index 0000000..09ba495
--- /dev/null
+++ b/libunwindstack/tests/files/offline/jit_map_arm/libart.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/jit_map_arm/libc.so b/libunwindstack/tests/files/offline/jit_map_arm/libc.so
new file mode 100644
index 0000000..39c9025
--- /dev/null
+++ b/libunwindstack/tests/files/offline/jit_map_arm/libc.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/jit_map_arm/maps.txt b/libunwindstack/tests/files/offline/jit_map_arm/maps.txt
new file mode 100644
index 0000000..5aaec54
--- /dev/null
+++ b/libunwindstack/tests/files/offline/jit_map_arm/maps.txt
@@ -0,0 +1,2 @@
+e466e000-e4ae8000 r-xp 0 00:00 0 libart.so
+e7d91000-e7e31000 r-xp 0 00:00 0 libc.so
diff --git a/libunwindstack/tests/files/offline/jit_map_arm/regs.txt b/libunwindstack/tests/files/offline/jit_map_arm/regs.txt
new file mode 100644
index 0000000..0b51814
--- /dev/null
+++ b/libunwindstack/tests/files/offline/jit_map_arm/regs.txt
@@ -0,0 +1,16 @@
+r0: e814103c
+r1: 12dcf218
+r2: 1a90df75
+r3: ffffffbf
+r4: 0
+r5: 12dc0800
+r6: 12dcf218
+r7: 1a90df75
+r8: 0
+r9: dd23cc00
+r10: 1c
+r11: cd4ff16c
+ip: 0
+sp: cd4ff140
+lr: d025cdd7
+pc: d025c788
diff --git a/libunwindstack/tests/files/offline/jit_map_arm/stack.data b/libunwindstack/tests/files/offline/jit_map_arm/stack.data
new file mode 100644
index 0000000..fb8feeb
--- /dev/null
+++ b/libunwindstack/tests/files/offline/jit_map_arm/stack.data
Binary files differ
diff --git a/libunwindstack/tools/unwind_for_offline.cpp b/libunwindstack/tools/unwind_for_offline.cpp
index 589731d..640992f 100644
--- a/libunwindstack/tools/unwind_for_offline.cpp
+++ b/libunwindstack/tools/unwind_for_offline.cpp
@@ -69,7 +69,7 @@
 bool SaveRegs(unwindstack::Regs* regs) {
   std::unique_ptr<FILE, decltype(&fclose)> fp(fopen("regs.txt", "w+"), &fclose);
   if (fp == nullptr) {
-    printf("Failed to create file regs.txt.\n");
+    perror("Failed to create file regs.txt");
     return false;
   }
   regs->IterateRegisters([&fp](const char* name, uint64_t value) {
@@ -102,13 +102,14 @@
 
     std::unique_ptr<FILE, decltype(&fclose)> fp(fopen(file_name.c_str(), "w+"), &fclose);
     if (fp == nullptr) {
-      printf("Failed to create stack.data.\n");
+      perror("Failed to create stack.data");
       return false;
     }
 
     size_t bytes = fwrite(&sp_start, 1, sizeof(sp_start), fp.get());
     if (bytes != sizeof(sp_start)) {
-      perror("Failed to write all data.");
+      printf("Failed to write sp_start data: sizeof(sp_start) %zu, written %zu\n", sizeof(sp_start),
+             bytes);
       return false;
     }
 
@@ -141,7 +142,7 @@
 
   std::unique_ptr<FILE, decltype(&fclose)> output(fopen(cur_name.c_str(), "w+"), &fclose);
   if (output == nullptr) {
-    printf("Cannot create %s\n", cur_name.c_str());
+    perror((std::string("Cannot create ") + cur_name).c_str());
     return false;
   }
 
@@ -160,13 +161,14 @@
 bool CopyElfFromFile(map_info_t* info) {
   std::unique_ptr<FILE, decltype(&fclose)> fp(fopen(info->name.c_str(), "r"), &fclose);
   if (fp == nullptr) {
+    perror((std::string("Cannot open ") + info->name).c_str());
     return false;
   }
 
   std::string cur_name = basename(info->name.c_str());
   std::unique_ptr<FILE, decltype(&fclose)> output(fopen(cur_name.c_str(), "w+"), &fclose);
   if (output == nullptr) {
-    printf("Cannot create file %s\n", cur_name.c_str());
+    perror((std::string("Cannot create file " + cur_name)).c_str());
     return false;
   }
   std::vector<uint8_t> buffer(10000);
@@ -265,7 +267,7 @@
 
   std::unique_ptr<FILE, decltype(&fclose)> fp(fopen("maps.txt", "w+"), &fclose);
   if (fp == nullptr) {
-    printf("Failed to create maps.txt.\n");
+    perror("Failed to create maps.txt");
     return false;
   }
 
diff --git a/libunwindstack/tools/unwind_info.cpp b/libunwindstack/tools/unwind_info.cpp
index 5a8edfd..266a6db 100644
--- a/libunwindstack/tools/unwind_info.cpp
+++ b/libunwindstack/tools/unwind_info.cpp
@@ -37,7 +37,7 @@
 
 namespace unwindstack {
 
-void DumpArm(ElfInterfaceArm* interface) {
+void DumpArm(Elf* elf, ElfInterfaceArm* interface) {
   if (interface == nullptr) {
     printf("No ARM Unwind Information.\n\n");
     return;
@@ -48,12 +48,11 @@
     uint64_t load_bias = entry.second.table_offset;
     printf(" PC Range 0x%" PRIx64 " - 0x%" PRIx64 "\n", entry.second.offset + load_bias,
            entry.second.table_size + load_bias);
-    for (auto addr : *interface) {
+    for (auto pc : *interface) {
       std::string name;
-      printf("  PC 0x%" PRIx64, addr + load_bias);
+      printf("  PC 0x%" PRIx64, pc + load_bias);
       uint64_t func_offset;
-      uint64_t pc = addr + load_bias;
-      if (interface->GetFunctionName(pc, load_bias, &name, &func_offset) && !name.empty()) {
+      if (elf->GetFunctionName(pc + load_bias, &name, &func_offset) && !name.empty()) {
         printf(" <%s>", name.c_str());
       }
       printf("\n");
@@ -63,7 +62,7 @@
         continue;
       }
       ArmExidx arm(nullptr, interface->memory(), nullptr);
-      arm.set_log(true);
+      arm.set_log(ARM_LOG_FULL);
       arm.set_log_skip_execution(true);
       arm.set_log_indent(2);
       if (!arm.ExtractEntryData(entry)) {
@@ -82,21 +81,21 @@
   printf("\n");
 }
 
-void DumpDwarfSection(ElfInterface* interface, DwarfSection* section, uint64_t load_bias) {
+void DumpDwarfSection(Elf* elf, DwarfSection* section, uint64_t) {
   for (const DwarfFde* fde : *section) {
     // Sometimes there are entries that have empty length, skip those since
     // they don't contain any interesting information.
     if (fde == nullptr || fde->pc_start == fde->pc_end) {
       continue;
     }
-    printf("\n  PC 0x%" PRIx64, fde->pc_start + load_bias);
+    printf("\n  PC 0x%" PRIx64 "-0x%" PRIx64, fde->pc_start, fde->pc_end);
     std::string name;
     uint64_t func_offset;
-    if (interface->GetFunctionName(fde->pc_start, load_bias, &name, &func_offset) && !name.empty()) {
+    if (elf->GetFunctionName(fde->pc_start, &name, &func_offset) && !name.empty()) {
       printf(" <%s>", name.c_str());
     }
     printf("\n");
-    if (!section->Log(2, UINT64_MAX, load_bias, fde)) {
+    if (!section->Log(2, UINT64_MAX, fde)) {
       printf("Failed to process cfa information for entry at 0x%" PRIx64 "\n", fde->pc_start);
     }
   }
@@ -126,13 +125,13 @@
 
   ElfInterface* interface = elf.interface();
   if (elf.machine_type() == EM_ARM) {
-    DumpArm(reinterpret_cast<ElfInterfaceArm*>(interface));
+    DumpArm(&elf, reinterpret_cast<ElfInterfaceArm*>(interface));
     printf("\n");
   }
 
   if (interface->eh_frame() != nullptr) {
     printf("eh_frame information:\n");
-    DumpDwarfSection(interface, interface->eh_frame(), elf.GetLoadBias());
+    DumpDwarfSection(&elf, interface->eh_frame(), elf.GetLoadBias());
     printf("\n");
   } else {
     printf("\nno eh_frame information\n");
@@ -140,7 +139,7 @@
 
   if (interface->debug_frame() != nullptr) {
     printf("\ndebug_frame information:\n");
-    DumpDwarfSection(interface, interface->debug_frame(), elf.GetLoadBias());
+    DumpDwarfSection(&elf, interface->debug_frame(), elf.GetLoadBias());
     printf("\n");
   } else {
     printf("\nno debug_frame information\n");
@@ -151,12 +150,12 @@
   if (gnu_debugdata_interface != nullptr) {
     if (gnu_debugdata_interface->eh_frame() != nullptr) {
       printf("\ngnu_debugdata (eh_frame):\n");
-      DumpDwarfSection(gnu_debugdata_interface, gnu_debugdata_interface->eh_frame(), 0);
+      DumpDwarfSection(&elf, gnu_debugdata_interface->eh_frame(), 0);
       printf("\n");
     }
     if (gnu_debugdata_interface->debug_frame() != nullptr) {
       printf("\ngnu_debugdata (debug_frame):\n");
-      DumpDwarfSection(gnu_debugdata_interface, gnu_debugdata_interface->debug_frame(), 0);
+      DumpDwarfSection(&elf, gnu_debugdata_interface->debug_frame(), 0);
       printf("\n");
     }
   } else {
diff --git a/libunwindstack/tools/unwind_reg_info.cpp b/libunwindstack/tools/unwind_reg_info.cpp
index 47a4f91..0f01566 100644
--- a/libunwindstack/tools/unwind_reg_info.cpp
+++ b/libunwindstack/tools/unwind_reg_info.cpp
@@ -34,7 +34,9 @@
 #include <unwindstack/ElfInterface.h>
 #include <unwindstack/Log.h>
 
+#include "ArmExidx.h"
 #include "DwarfOp.h"
+#include "ElfInterfaceArm.h"
 
 namespace unwindstack {
 
@@ -136,6 +138,32 @@
   }
 }
 
+void PrintArmRegInformation(ElfInterfaceArm* interface, uint64_t pc) {
+  printf("\nArm exidx:\n");
+  uint64_t entry_offset;
+  if (!interface->FindEntry(pc, &entry_offset)) {
+    return;
+  }
+
+  ArmExidx arm(nullptr, interface->memory(), nullptr);
+
+  log_to_stdout(true);
+  arm.set_log(ARM_LOG_BY_REG);
+  arm.set_log_skip_execution(true);
+  arm.set_log_indent(1);
+  if (!arm.ExtractEntryData(entry_offset)) {
+    if (arm.status() != ARM_STATUS_NO_UNWIND) {
+      printf("  Error trying to extract data.\n");
+    }
+    return;
+  }
+  if (arm.data()->size() != 0 && arm.Eval()) {
+    arm.LogByReg();
+  } else {
+    printf("  Error tring to evaluate exidx data.\n");
+  }
+}
+
 int GetInfo(const char* file, uint64_t pc) {
   MemoryFileAtOffset* memory = new MemoryFileAtOffset;
   if (!memory->Init(file, 0)) {
@@ -162,12 +190,22 @@
     printf("Soname: %s\n\n", soname.c_str());
   }
 
-  printf("PC 0x%" PRIx64 ":\n", pc);
+  printf("PC 0x%" PRIx64, pc);
+  std::string function_name;
+  uint64_t function_offset;
+  if (elf.GetFunctionName(pc, &function_name, &function_offset)) {
+    printf(" (%s)", function_name.c_str());
+  }
+  printf(":\n");
+
+  if (elf.machine_type() == EM_ARM) {
+    PrintArmRegInformation(reinterpret_cast<ElfInterfaceArm*>(interface), pc - load_bias);
+  }
 
   DwarfSection* section = interface->eh_frame();
   if (section != nullptr) {
     printf("\neh_frame:\n");
-    PrintRegInformation(section, memory, pc - load_bias, elf.class_type());
+    PrintRegInformation(section, memory, pc, elf.class_type());
   } else {
     printf("\nno eh_frame information\n");
   }
@@ -175,7 +213,7 @@
   section = interface->debug_frame();
   if (section != nullptr) {
     printf("\ndebug_frame:\n");
-    PrintRegInformation(section, memory, pc - load_bias, elf.class_type());
+    PrintRegInformation(section, memory, pc, elf.class_type());
     printf("\n");
   } else {
     printf("\nno debug_frame information\n");
diff --git a/libunwindstack/tools/unwind_symbols.cpp b/libunwindstack/tools/unwind_symbols.cpp
index 086dffe..f8e3e92 100644
--- a/libunwindstack/tools/unwind_symbols.cpp
+++ b/libunwindstack/tools/unwind_symbols.cpp
@@ -95,7 +95,6 @@
   }
 
   std::string name;
-  uint64_t load_bias = elf.GetLoadBias();
   if (argc == 3) {
     std::string cur_name;
     uint64_t func_offset;
@@ -113,8 +112,8 @@
 
   // This is a crude way to get the symbols in order.
   for (const auto& entry : elf.interface()->pt_loads()) {
-    uint64_t start = entry.second.offset + load_bias;
-    uint64_t end = entry.second.table_size + load_bias;
+    uint64_t start = entry.second.offset;
+    uint64_t end = entry.second.table_size;
     for (uint64_t addr = start; addr < end; addr += 4) {
       std::string cur_name;
       uint64_t func_offset;
diff --git a/libutils/Android.bp b/libutils/Android.bp
index a4fc4b4..bbfa9d8 100644
--- a/libutils/Android.bp
+++ b/libutils/Android.bp
@@ -15,6 +15,7 @@
 cc_library_headers {
     name: "libutils_headers",
     vendor_available: true,
+    recovery_available: true,
     host_supported: true,
 
     header_libs: [
@@ -46,6 +47,7 @@
 cc_defaults {
     name: "libutils_defaults",
     vendor_available: true,
+    recovery_available: true,
     vndk: {
         enabled: true,
         support_system_process: true,
@@ -89,6 +91,10 @@
             },
         },
 
+        recovery: {
+            exclude_shared_libs: ["libvndksupport"],
+        },
+
         host: {
             cflags: ["-DLIBUTILS_NATIVE=1"],
 
@@ -129,7 +135,6 @@
         "PropertyMap.cpp",
         "RefBase.cpp",
         "SharedBuffer.cpp",
-        "Static.cpp",
         "StopWatch.cpp",
         "String8.cpp",
         "String16.cpp",
diff --git a/libutils/SharedBuffer.h b/libutils/SharedBuffer.h
index 48358cd..81cadff 100644
--- a/libutils/SharedBuffer.h
+++ b/libutils/SharedBuffer.h
@@ -139,7 +139,7 @@
     return (mRefs.load(std::memory_order_acquire) == 1);
 }
 
-}; // namespace android
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 
diff --git a/libutils/Static.cpp b/libutils/Static.cpp
deleted file mode 100644
index 3ed07a1..0000000
--- a/libutils/Static.cpp
+++ /dev/null
@@ -1,49 +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.
- */
-
-// All static variables go here, to control initialization and
-// destruction order in the library.
-
-namespace android {
-
-// For String8.cpp
-extern void initialize_string8();
-extern void terminate_string8();
-
-// For String16.cpp
-extern void initialize_string16();
-extern void terminate_string16();
-
-class LibUtilsFirstStatics
-{
-public:
-    LibUtilsFirstStatics()
-    {
-        initialize_string8();
-        initialize_string16();
-    }
-    
-    ~LibUtilsFirstStatics()
-    {
-        terminate_string16();
-        terminate_string8();
-    }
-};
-
-static LibUtilsFirstStatics gFirstStatics;
-int gDarwinCantLoadAllObjects = 1;
-
-}   // namespace android
diff --git a/libutils/String16.cpp b/libutils/String16.cpp
index e8f1c51..230e970 100644
--- a/libutils/String16.cpp
+++ b/libutils/String16.cpp
@@ -24,29 +24,16 @@
 
 namespace android {
 
-static SharedBuffer* gEmptyStringBuf = NULL;
-static char16_t* gEmptyString = NULL;
+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;
+    }();
 
-static inline char16_t* getEmptyString()
-{
     gEmptyStringBuf->acquire();
-   return gEmptyString;
-}
-
-void initialize_string16()
-{
-    SharedBuffer* buf = SharedBuffer::alloc(sizeof(char16_t));
-    char16_t* str = (char16_t*)buf->data();
-    *str = 0;
-    gEmptyStringBuf = buf;
-    gEmptyString = str;
-}
-
-void terminate_string16()
-{
-    SharedBuffer::bufferFromData(gEmptyString)->release();
-    gEmptyStringBuf = NULL;
-    gEmptyString = NULL;
+    return static_cast<char16_t*>(gEmptyStringBuf->data());
 }
 
 // ---------------------------------------------------------------------------
diff --git a/libutils/String8.cpp b/libutils/String8.cpp
index ad0e72e..580e870 100644
--- a/libutils/String8.cpp
+++ b/libutils/String8.cpp
@@ -40,40 +40,16 @@
 // to OS_PATH_SEPARATOR.
 #define RES_PATH_SEPARATOR '/'
 
-static SharedBuffer* gEmptyStringBuf = NULL;
-static char* gEmptyString = NULL;
+static inline char* getEmptyString() {
+    static SharedBuffer* gEmptyStringBuf = [] {
+        SharedBuffer* buf = SharedBuffer::alloc(1);
+        char* str = static_cast<char*>(buf->data());
+        *str = 0;
+        return buf;
+    }();
 
-extern int gDarwinCantLoadAllObjects;
-int gDarwinIsReallyAnnoying;
-
-void initialize_string8();
-
-static inline char* getEmptyString()
-{
     gEmptyStringBuf->acquire();
-    return gEmptyString;
-}
-
-void initialize_string8()
-{
-    // HACK: This dummy dependency forces linking libutils Static.cpp,
-    // which is needed to initialize String8/String16 classes.
-    // These variables are named for Darwin, but are needed elsewhere too,
-    // including static linking on any platform.
-    gDarwinIsReallyAnnoying = gDarwinCantLoadAllObjects;
-
-    SharedBuffer* buf = SharedBuffer::alloc(1);
-    char* str = (char*)buf->data();
-    *str = 0;
-    gEmptyStringBuf = buf;
-    gEmptyString = str;
-}
-
-void terminate_string8()
-{
-    SharedBuffer::bufferFromData(gEmptyString)->release();
-    gEmptyStringBuf = NULL;
-    gEmptyString = NULL;
+    return static_cast<char*>(gEmptyStringBuf->data());
 }
 
 // ---------------------------------------------------------------------------
diff --git a/libutils/include/utils/AndroidThreads.h b/libutils/include/utils/AndroidThreads.h
index 4c2dd49..dab888d 100644
--- a/libutils/include/utils/AndroidThreads.h
+++ b/libutils/include/utils/AndroidThreads.h
@@ -118,7 +118,7 @@
 }
 
 // ----------------------------------------------------------------------------
-}; // namespace android
+}  // namespace android
 #endif  // __cplusplus
 // ----------------------------------------------------------------------------
 
diff --git a/libutils/include/utils/CallStack.h b/libutils/include/utils/CallStack.h
index 27e89f4..9622142 100644
--- a/libutils/include/utils/CallStack.h
+++ b/libutils/include/utils/CallStack.h
@@ -67,6 +67,6 @@
     Vector<String8> mFrameLines;
 };
 
-}; // namespace android
+}  // namespace android
 
 #endif // ANDROID_CALLSTACK_H
diff --git a/libutils/include/utils/Condition.h b/libutils/include/utils/Condition.h
index 9bf82eb..c8da67c 100644
--- a/libutils/include/utils/Condition.h
+++ b/libutils/include/utils/Condition.h
@@ -159,7 +159,7 @@
 #endif // !defined(_WIN32)
 
 // ---------------------------------------------------------------------------
-}; // namespace android
+}  // namespace android
 // ---------------------------------------------------------------------------
 
 #endif // _LIBS_UTILS_CONDITON_H
diff --git a/libutils/include/utils/Debug.h b/libutils/include/utils/Debug.h
index 4cbb462..96bd70e 100644
--- a/libutils/include/utils/Debug.h
+++ b/libutils/include/utils/Debug.h
@@ -35,6 +35,6 @@
     CompileTimeAssert<( _exp )>();
 
 // ---------------------------------------------------------------------------
-}; // namespace android
+}  // namespace android
 
 #endif // ANDROID_UTILS_DEBUG_H
diff --git a/libutils/include/utils/Errors.h b/libutils/include/utils/Errors.h
index 16e1fa2..7093a20 100644
--- a/libutils/include/utils/Errors.h
+++ b/libutils/include/utils/Errors.h
@@ -81,8 +81,8 @@
 # define NO_ERROR 0L
 #endif
 
-}; // namespace android
-    
+}  // namespace android
+
 // ---------------------------------------------------------------------------
     
 #endif // ANDROID_ERRORS_H
diff --git a/libutils/include/utils/FileMap.h b/libutils/include/utils/FileMap.h
index 7d372e1..8d402a3 100644
--- a/libutils/include/utils/FileMap.h
+++ b/libutils/include/utils/FileMap.h
@@ -124,6 +124,6 @@
     static long mPageSize;
 };
 
-}; // namespace android
+}  // namespace android
 
 #endif // __LIBS_FILE_MAP_H
diff --git a/libutils/include/utils/Flattenable.h b/libutils/include/utils/Flattenable.h
index 675e211..0a19019 100644
--- a/libutils/include/utils/Flattenable.h
+++ b/libutils/include/utils/Flattenable.h
@@ -198,8 +198,6 @@
     }
 };
 
-
-}; // namespace android
-
+}  // namespace android
 
 #endif /* ANDROID_UTILS_FLATTENABLE_H */
diff --git a/libutils/include/utils/Functor.h b/libutils/include/utils/Functor.h
index 3182a9c..c0c8d57 100644
--- a/libutils/include/utils/Functor.h
+++ b/libutils/include/utils/Functor.h
@@ -32,6 +32,6 @@
     virtual status_t operator ()(int /*what*/, void* /*data*/) { return NO_ERROR; }
 };
 
-}; // namespace android
+}  // namespace android
 
 #endif // ANDROID_FUNCTOR_H
diff --git a/libutils/include/utils/KeyedVector.h b/libutils/include/utils/KeyedVector.h
index 03bfe27..7bda99b 100644
--- a/libutils/include/utils/KeyedVector.h
+++ b/libutils/include/utils/KeyedVector.h
@@ -211,7 +211,7 @@
     return i >= 0 ? KeyedVector<KEY,VALUE>::valueAt(i) : mDefault;
 }
 
-}; // namespace android
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 
diff --git a/libutils/include/utils/LightRefBase.h b/libutils/include/utils/LightRefBase.h
index 65257ed..e488e60 100644
--- a/libutils/include/utils/LightRefBase.h
+++ b/libutils/include/utils/LightRefBase.h
@@ -69,4 +69,4 @@
     virtual ~VirtualLightRefBase() = default;
 };
 
-}; // namespace android
+}  // namespace android
diff --git a/libutils/include/utils/List.h b/libutils/include/utils/List.h
index daca016..25b56fd 100644
--- a/libutils/include/utils/List.h
+++ b/libutils/include/utils/List.h
@@ -329,6 +329,6 @@
     return *this;
 }
 
-}; // namespace android
+}  // namespace android
 
 #endif // _LIBS_UTILS_LIST_H
diff --git a/libutils/include/utils/Mutex.h b/libutils/include/utils/Mutex.h
index af6076c..1228df4 100644
--- a/libutils/include/utils/Mutex.h
+++ b/libutils/include/utils/Mutex.h
@@ -212,7 +212,7 @@
 typedef Mutex::Autolock AutoMutex;
 
 // ---------------------------------------------------------------------------
-}; // namespace android
+}  // namespace android
 // ---------------------------------------------------------------------------
 
 #endif // _LIBS_UTILS_MUTEX_H
diff --git a/libutils/include/utils/Printer.h b/libutils/include/utils/Printer.h
index bb66287..a6f6928 100644
--- a/libutils/include/utils/Printer.h
+++ b/libutils/include/utils/Printer.h
@@ -114,6 +114,6 @@
     const char* mPrefix;
 };
 
-}; // namespace android
+}  // namespace android
 
 #endif // ANDROID_PRINTER_H
diff --git a/libutils/include/utils/ProcessCallStack.h b/libutils/include/utils/ProcessCallStack.h
index 32458b8..b5f2edc 100644
--- a/libutils/include/utils/ProcessCallStack.h
+++ b/libutils/include/utils/ProcessCallStack.h
@@ -74,6 +74,6 @@
     struct tm mTimeUpdated;
 };
 
-}; // namespace android
+}  // namespace android
 
 #endif // ANDROID_PROCESS_CALLSTACK_H
diff --git a/libutils/include/utils/RWLock.h b/libutils/include/utils/RWLock.h
index d5b81d3..7d43e69 100644
--- a/libutils/include/utils/RWLock.h
+++ b/libutils/include/utils/RWLock.h
@@ -120,7 +120,7 @@
 #endif // !defined(_WIN32)
 
 // ---------------------------------------------------------------------------
-}; // namespace android
+}  // namespace android
 // ---------------------------------------------------------------------------
 
 #endif // _LIBS_UTILS_RWLOCK_H
diff --git a/libutils/include/utils/RefBase.h b/libutils/include/utils/RefBase.h
index 223b666..e817ee4 100644
--- a/libutils/include/utils/RefBase.h
+++ b/libutils/include/utils/RefBase.h
@@ -683,7 +683,7 @@
     ReferenceMover::move_references(d, s, n);
 }
 
-}; // namespace android
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 
diff --git a/libutils/include/utils/Singleton.h b/libutils/include/utils/Singleton.h
index bc47a5c..2dd5a47 100644
--- a/libutils/include/utils/Singleton.h
+++ b/libutils/include/utils/Singleton.h
@@ -95,7 +95,7 @@
 
 
 // ---------------------------------------------------------------------------
-}; // namespace android
+}  // namespace android
 
 #endif // ANDROID_UTILS_SINGLETON_H
 
diff --git a/libutils/include/utils/SortedVector.h b/libutils/include/utils/SortedVector.h
index 47c1376..394db12 100644
--- a/libutils/include/utils/SortedVector.h
+++ b/libutils/include/utils/SortedVector.h
@@ -288,8 +288,7 @@
     return compare_type( *reinterpret_cast<const TYPE*>(lhs), *reinterpret_cast<const TYPE*>(rhs) );
 }
 
-}; // namespace android
-
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 
diff --git a/libutils/include/utils/StopWatch.h b/libutils/include/utils/StopWatch.h
index 76d78d0..9b14ac8 100644
--- a/libutils/include/utils/StopWatch.h
+++ b/libutils/include/utils/StopWatch.h
@@ -52,9 +52,7 @@
     int             mNumLaps;
 };
 
-
-}; // namespace android
-
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 
diff --git a/libutils/include/utils/String16.h b/libutils/include/utils/String16.h
index 5f0ce06..afbc2ed 100644
--- a/libutils/include/utils/String16.h
+++ b/libutils/include/utils/String16.h
@@ -243,7 +243,7 @@
     return mString;
 }
 
-}; // namespace android
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 
diff --git a/libutils/include/utils/StrongPointer.h b/libutils/include/utils/StrongPointer.h
index ae6d9c8..9cd278f1 100644
--- a/libutils/include/utils/StrongPointer.h
+++ b/libutils/include/utils/StrongPointer.h
@@ -239,7 +239,7 @@
     m_ptr = ptr;
 }
 
-}; // namespace android
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 
diff --git a/libutils/include/utils/SystemClock.h b/libutils/include/utils/SystemClock.h
index 01db340..f816fba 100644
--- a/libutils/include/utils/SystemClock.h
+++ b/libutils/include/utils/SystemClock.h
@@ -26,7 +26,7 @@
 int64_t elapsedRealtime();
 int64_t elapsedRealtimeNano();
 
-}; // namespace android
+}  // namespace android
 
 #endif // ANDROID_UTILS_SYSTEMCLOCK_H
 
diff --git a/libutils/include/utils/Thread.h b/libutils/include/utils/Thread.h
index 598298d..3525138 100644
--- a/libutils/include/utils/Thread.h
+++ b/libutils/include/utils/Thread.h
@@ -110,8 +110,7 @@
 #endif
 };
 
-
-}; // namespace android
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 #endif // _LIBS_UTILS_THREAD_H
diff --git a/libutils/include/utils/ThreadDefs.h b/libutils/include/utils/ThreadDefs.h
index ae091e4..8eb3d1c 100644
--- a/libutils/include/utils/ThreadDefs.h
+++ b/libutils/include/utils/ThreadDefs.h
@@ -66,9 +66,8 @@
 };
 
 // ---------------------------------------------------------------------------
-}; // namespace android
+}  // namespace android
 #endif  // __cplusplus
 // ---------------------------------------------------------------------------
 
-
 #endif // _LIBS_UTILS_THREAD_DEFS_H
diff --git a/libutils/include/utils/Trace.h b/libutils/include/utils/Trace.h
index 5e9229c..4b9c91e 100644
--- a/libutils/include/utils/Trace.h
+++ b/libutils/include/utils/Trace.h
@@ -49,7 +49,7 @@
     uint64_t mTag;
 };
 
-}; // namespace android
+}  // namespace android
 
 #else // !__ANDROID__
 
diff --git a/libutils/include/utils/TypeHelpers.h b/libutils/include/utils/TypeHelpers.h
index 28fbca5..1554f52 100644
--- a/libutils/include/utils/TypeHelpers.h
+++ b/libutils/include/utils/TypeHelpers.h
@@ -329,7 +329,7 @@
     return hash_type(uintptr_t(value));
 }
 
-}; // namespace android
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 
diff --git a/libutils/include/utils/Vector.h b/libutils/include/utils/Vector.h
index a1a0234..ddf71de 100644
--- a/libutils/include/utils/Vector.h
+++ b/libutils/include/utils/Vector.h
@@ -425,8 +425,7 @@
     move_backward_type( reinterpret_cast<TYPE*>(dest), reinterpret_cast<const TYPE*>(from), num );
 }
 
-}; // namespace android
-
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 
diff --git a/libutils/include/utils/VectorImpl.h b/libutils/include/utils/VectorImpl.h
index 4dd91fd..55d5d98 100644
--- a/libutils/include/utils/VectorImpl.h
+++ b/libutils/include/utils/VectorImpl.h
@@ -175,8 +175,7 @@
             ssize_t         replaceAt(const void* item, size_t index);
 };
 
-}; // namespace android
-
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 
diff --git a/libutils/include/utils/misc.h b/libutils/include/utils/misc.h
index af5ea02..32615b3 100644
--- a/libutils/include/utils/misc.h
+++ b/libutils/include/utils/misc.h
@@ -35,6 +35,6 @@
 void add_sysprop_change_callback(sysprop_change_callback cb, int priority);
 void report_sysprop_change();
 
-}; // namespace android
+}  // namespace android
 
 #endif // _LIBS_UTILS_MISC_H
diff --git a/libutils/misc.cpp b/libutils/misc.cpp
index da28dfa..f074341 100644
--- a/libutils/misc.cpp
+++ b/libutils/misc.cpp
@@ -23,7 +23,7 @@
 #include <utils/Log.h>
 #include <utils/Vector.h>
 
-#if defined(__ANDROID__)
+#if defined(__ANDROID__) && !defined(__ANDROID_RECOVERY__)
 #include <dlfcn.h>
 #include <vndksupport/linker.h>
 #endif
@@ -70,7 +70,7 @@
 void add_sysprop_change_callback(sysprop_change_callback, int) {}
 #endif
 
-#if defined(__ANDROID__)
+#if defined(__ANDROID__) && !defined(__ANDROID_RECOVERY__)
 void (*get_report_sysprop_change_func())() {
     void (*func)() = nullptr;
     void* handle = android_load_sphal_library("libutils.so", RTLD_NOW);
@@ -85,7 +85,7 @@
 void report_sysprop_change() {
     do_report_sysprop_change();
 
-#if defined(__ANDROID__)
+#if defined(__ANDROID__) && !defined(__ANDROID_RECOVERY__)
     // libutils.so is double loaded; from the default namespace and from the
     // 'sphal' namespace. Redirect the sysprop change event to the other instance
     // of libutils.so loaded in the 'sphal' namespace so that listeners attached
diff --git a/libziparchive/Android.bp b/libziparchive/Android.bp
index 075fb86..2606aa9 100644
--- a/libziparchive/Android.bp
+++ b/libziparchive/Android.bp
@@ -58,9 +58,11 @@
     name: "libziparchive",
     host_supported: true,
     vendor_available: true,
+    recovery_available: true,
     vndk: {
         enabled: true,
     },
+    double_loadable: true,
 
     defaults: [
         "libziparchive_defaults",
@@ -92,6 +94,10 @@
     host_supported: true,
     defaults: ["libziparchive_flags"],
 
+    data: [
+        "testdata/**/*",
+    ],
+
     srcs: [
         "entry_name_utils_test.cc",
         "zip_archive_test.cc",
diff --git a/libziparchive/zip_archive_test.cc b/libziparchive/zip_archive_test.cc
index ff73eb2..23dd5dc 100644
--- a/libziparchive/zip_archive_test.cc
+++ b/libziparchive/zip_archive_test.cc
@@ -34,7 +34,7 @@
 #include <ziparchive/zip_archive.h>
 #include <ziparchive/zip_archive_stream_entry.h>
 
-static std::string test_data_dir;
+static std::string test_data_dir = android::base::GetExecutableDirectory() + "/testdata";
 
 static const std::string kMissingZip = "missing.zip";
 static const std::string kValidZip = "valid.zip";
@@ -778,41 +778,3 @@
     ASSERT_EQ(0u, writer.GetOutput().size());
   }
 }
-
-int main(int argc, char** argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-
-  static struct option options[] = {{"test_data_dir", required_argument, nullptr, 't'},
-                                    {nullptr, 0, nullptr, 0}};
-
-  while (true) {
-    int option_index;
-    const int c = getopt_long_only(argc, argv, "", options, &option_index);
-    if (c == -1) {
-      break;
-    }
-
-    if (c == 't') {
-      test_data_dir = optarg;
-    }
-  }
-
-  if (test_data_dir.size() == 0) {
-    printf("Test data flag (--test_data_dir) required\n\n");
-    return -1;
-  }
-
-  if (test_data_dir[0] != '/') {
-    std::vector<char> cwd_buffer(1024);
-    const char* cwd = getcwd(cwd_buffer.data(), cwd_buffer.size() - 1);
-    if (cwd == nullptr) {
-      printf("Cannot get current working directory, use an absolute path instead, was %s\n\n",
-             test_data_dir.c_str());
-      return -2;
-    }
-    test_data_dir = '/' + test_data_dir;
-    test_data_dir = cwd + test_data_dir;
-  }
-
-  return RUN_ALL_TESTS();
-}
diff --git a/llkd/Android.bp b/llkd/Android.bp
new file mode 100644
index 0000000..a6edd26
--- /dev/null
+++ b/llkd/Android.bp
@@ -0,0 +1,42 @@
+cc_library_headers {
+    name: "llkd_headers",
+
+    export_include_dirs: ["include"],
+}
+
+cc_library_static {
+    name: "libllkd",
+
+    srcs: [
+        "libllkd.cpp",
+    ],
+
+    shared_libs: [
+        "libbase",
+        "libcutils",
+        "liblog",
+    ],
+
+    export_include_dirs: ["include"],
+
+    cflags: ["-Werror"],
+}
+
+cc_binary {
+    name: "llkd",
+
+    srcs: [
+        "llkd.cpp",
+    ],
+    shared_libs: [
+        "libbase",
+        "libcutils",
+        "liblog",
+    ],
+    static_libs: [
+        "libllkd",
+    ],
+    cflags: ["-Werror"],
+
+    init_rc: ["llkd.rc"],
+}
diff --git a/llkd/OWNERS b/llkd/OWNERS
new file mode 100644
index 0000000..b6af537
--- /dev/null
+++ b/llkd/OWNERS
@@ -0,0 +1,2 @@
+salyzyn@google.com
+surenb@google.com
diff --git a/llkd/README.md b/llkd/README.md
new file mode 100644
index 0000000..b2ba2a2
--- /dev/null
+++ b/llkd/README.md
@@ -0,0 +1,117 @@
+Android Live-LocK Daemon
+========================
+
+Introduction
+------------
+
+Android Live-LocK Daemon (llkd) is used to catch kernel deadlocks and mitigate.
+
+Code is structured to allow integration into another service as either as part
+of the main loop, or spun off as a thread should that be necessary.  A default
+standalone implementation is provided by llkd component.
+
+The 'C' interface from libllkd component is thus:
+
+    #include "llkd.h"
+    bool llkInit(const char* threadname) /* return true if enabled */
+    unsigned llkCheckMillseconds(void)   /* ms to sleep for next check */
+
+If a threadname is provided, a thread will be automatically spawned, otherwise
+caller must call llkCheckMilliseconds in its main loop.  Function will return
+the period of time before the next expected call to this handler.
+
+Operations
+----------
+
+If a thread is in D or Z state with no forward progress for longer than
+ro.llk.timeout_ms, or ro.llk.[D|Z].timeout_ms, kill the process or parent
+process respectively.  If another scan shows the same process continues to
+exist, then have a confirmed live-lock condition and need to panic.  Panic
+the kernel in a manner to provide the greatest bugreporting details as to the
+condition.  Add a alarm self watchdog should llkd ever get locked up that is
+double the expected time to flow through the mainloop.  Sampling is every
+ro.llk_sample_ms.
+
+Default will not monitor init, or [kthreadd] and all that [kthreadd] spawns.
+This reduces the effectiveness of llkd by limiting its coverage.  If there is
+value in covering [kthreadd] spawned threads, the requirement will be that
+the drivers not remain in a persistent 'D' state, or that they have mechanisms
+to recover the thread should it be killed externally (this is good driver
+coding hygiene, a common request to add such to publicly reviewed kernel.org
+maintained drivers).  For instance use wait_event_interruptible() instead of
+wait_event().  The blacklists can be adjusted accordingly if these
+conditions are met to cover kernel components.
+
+An accompanying gTest set have been added, and will setup a persistent D or Z
+process, with and without forward progress, but not in a live-lock state
+because that would require a buggy kernel, or a module or kernel modification
+to stimulate.  The test will check that llkd will mitigate first by killing
+the appropriate process.  D state is setup by vfork() waiting for exec() in
+child process.  Z state is setup by fork() and an un-waited for child process.
+Should be noted that both of these conditions should never happen on Android
+on purpose, and llkd effectively sweeps up processes that create these
+conditions.  If the test can, it will reconfigure llkd to expedite the test
+duration by adjusting the ro.llk.* Android properties.  Tests run the D state
+with some scheduling progress to ensure that ABA checking prevents false
+triggers. If 100% reliable ABA on platform, then ro.llk.killtest can be
+set to false; however this will result in some of the unit tests to panic
+kernel instead of deal with more graceful kill operation.
+
+Android Properties
+------------------
+
+Android Properties llkd respond to (<prop>_ms parms are in milliseconds):
+
+#### ro.config.low_ram
+default false, if true do not sysrq t (dump all threads).
+
+#### ro.llk.enable
+default false, allow live-lock daemon to be enabled.
+
+#### llk.enable
+default ro.llk.enable, and evaluated for eng.
+
+#### ro.khungtask.enable
+default false, allow [khungtask] daemon to be enabled.
+
+#### khungtask.enable
+default ro.khungtask.enable and evaluated for eng.
+
+#### ro.llk.mlockall
+default false, enable call to mlockall().
+
+#### ro.khungtask.timeout
+default value 12 minutes, [khungtask] maximum timelimit.
+
+#### ro.llk.timeout_ms
+default 10 minutes, D or Z maximum timelimit, double this value and it sets
+the alarm watchdog for llkd.
+
+#### ro.llk.D.timeout_ms
+default ro.llk.timeout_ms, D maximum timelimit.
+
+#### ro.llk.Z.timeout_ms
+default ro.llk.timeout_ms, Z maximum timelimit.
+
+#### ro.llk.check_ms
+default 2 minutes samples of threads for D or Z.
+
+#### ro.llk.blacklist.process
+default 0,1,2 (kernel, init and [kthreadd]) plus process names
+init,[kthreadd],[khungtaskd],lmkd,lmkd.llkd,llkd,watchdogd,
+[watchdogd],[watchdogd/0],...,[watchdogd/<get_nprocs-1>].
+
+#### ro.llk.blacklist.parent
+default 0,2 (kernel and [kthreadd]).
+
+#### ro.llk.blacklist.uid
+default <empty>, comma separated list of uid numbers or names.
+
+Architectural Concerns
+----------------------
+
+- Create kernel module and associated gTest to actually test panic.
+- Create gTest to test out blacklist (ro.llk.blacklist.<properties> generally
+  not be inputs).  Could require more test-only interfaces to libllkd.
+- Speed up gTest using something else than ro.llk.<properties>, which should
+  not be inputs.
diff --git a/llkd/include/llkd.h b/llkd/include/llkd.h
new file mode 100644
index 0000000..e3ae4bb
--- /dev/null
+++ b/llkd/include/llkd.h
@@ -0,0 +1,80 @@
+/*
+ * 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 _LLKD_H_
+#define _LLKD_H_
+
+#ifndef LOG_TAG
+#define LOG_TAG "livelock"
+#endif
+
+#include <stdbool.h>
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+bool llkInit(const char* threadname); /* threadname NULL, not spawned */
+unsigned llkCheckMilliseconds(void);
+
+/* clang-format off */
+#define LLK_ENABLE_WRITEABLE_PROPERTY  "llk.enable"
+#define LLK_ENABLE_PROPERTY            "ro." LLK_ENABLE_WRITEABLE_PROPERTY
+#define LLK_ENABLE_DEFAULT             false /* "eng" and userdebug true */
+#define KHT_ENABLE_WRITEABLE_PROPERTY  "khungtask.enable"
+#define KHT_ENABLE_PROPERTY            "ro." KHT_ENABLE_WRITEABLE_PROPERTY
+#define LLK_MLOCKALL_PROPERTY          "ro.llk.mlockall"
+#define LLK_MLOCKALL_DEFAULT           true
+#define LLK_KILLTEST_PROPERTY          "ro.llk.killtest"
+#define LLK_KILLTEST_DEFAULT           true
+#define LLK_TIMEOUT_MS_PROPERTY        "ro.llk.timeout_ms"
+#define KHT_TIMEOUT_PROPERTY           "ro.khungtask.timeout"
+#define LLK_D_TIMEOUT_MS_PROPERTY      "ro.llk.D.timeout_ms"
+#define LLK_Z_TIMEOUT_MS_PROPERTY      "ro.llk.Z.timeout_ms"
+#define LLK_CHECK_MS_PROPERTY          "ro.llk.check_ms"
+/* LLK_CHECK_MS_DEFAULT = actual timeout_ms / LLK_CHECKS_PER_TIMEOUT_DEFAULT */
+#define LLK_CHECKS_PER_TIMEOUT_DEFAULT 5
+#define LLK_BLACKLIST_PROCESS_PROPERTY "ro.llk.blacklist.process"
+#define LLK_BLACKLIST_PROCESS_DEFAULT  \
+    "0,1,2,init,[kthreadd],[khungtaskd],lmkd,lmkd.llkd,llkd,watchdogd,[watchdogd],[watchdogd/0]"
+#define LLK_BLACKLIST_PARENT_PROPERTY  "ro.llk.blacklist.parent"
+#define LLK_BLACKLIST_PARENT_DEFAULT   "0,2,[kthreadd]"
+#define LLK_BLACKLIST_UID_PROPERTY     "ro.llk.blacklist.uid"
+#define LLK_BLACKLIST_UID_DEFAULT      ""
+/* clang-format on */
+
+__END_DECLS
+
+#ifdef __cplusplus
+extern "C++" { /* In case this included wrapped with __BEGIN_DECLS */
+
+#include <chrono>
+
+__BEGIN_DECLS
+/* C++ code allowed to not specify threadname argument for this C linkage */
+bool llkInit(const char* threadname = nullptr);
+__END_DECLS
+std::chrono::milliseconds llkCheck(bool checkRunning = false);
+
+/* clang-format off */
+#define LLK_TIMEOUT_MS_DEFAULT  std::chrono::duration_cast<milliseconds>(std::chrono::minutes(10))
+#define LLK_TIMEOUT_MS_MINIMUM  std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::seconds(10))
+#define LLK_CHECK_MS_MINIMUM    std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::seconds(1))
+/* clang-format on */
+
+} /* extern "C++" */
+#endif /* __cplusplus */
+
+#endif /* _LLKD_H_ */
diff --git a/llkd/libllkd.cpp b/llkd/libllkd.cpp
new file mode 100644
index 0000000..f357cc2
--- /dev/null
+++ b/llkd/libllkd.cpp
@@ -0,0 +1,1168 @@
+/*
+ * 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 "llkd.h"
+
+#include <ctype.h>
+#include <dirent.h>  // opendir() and readdir()
+#include <errno.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <pwd.h>  // getpwuid()
+#include <signal.h>
+#include <stdint.h>
+#include <sys/cdefs.h>  // ___STRING, __predict_true() and _predict_false()
+#include <sys/mman.h>   // mlockall()
+#include <sys/prctl.h>
+#include <sys/stat.h>     // lstat()
+#include <sys/syscall.h>  // __NR_getdents64
+#include <sys/sysinfo.h>  // get_nprocs_conf()
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <chrono>
+#include <ios>
+#include <sstream>
+#include <string>
+#include <unordered_map>
+#include <unordered_set>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/parseint.h>
+#include <android-base/properties.h>
+#include <android-base/strings.h>
+#include <cutils/android_get_control_file.h>
+#include <log/log_main.h>
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
+
+#define TASK_COMM_LEN 16  // internal kernel, not uapi, from .../linux/include/linux/sched.h
+
+using namespace std::chrono_literals;
+using namespace std::chrono;
+
+namespace {
+
+constexpr pid_t kernelPid = 0;
+constexpr pid_t initPid = 1;
+constexpr pid_t kthreaddPid = 2;
+
+constexpr char procdir[] = "/proc/";
+
+// Configuration
+milliseconds llkUpdate;                              // last check ms signature
+milliseconds llkCycle;                               // ms to next thread check
+bool llkEnable = LLK_ENABLE_DEFAULT;                 // llk daemon enabled
+bool llkRunning = false;                             // thread is running
+bool llkMlockall = LLK_MLOCKALL_DEFAULT;             // run mlocked
+bool llkTestWithKill = LLK_KILLTEST_DEFAULT;         // issue test kills
+milliseconds llkTimeoutMs = LLK_TIMEOUT_MS_DEFAULT;  // default timeout
+enum { llkStateD, llkStateZ, llkNumStates };         // state indexes
+milliseconds llkStateTimeoutMs[llkNumStates];        // timeout override for each detection state
+milliseconds llkCheckMs;                             // checking interval to inspect any
+                                                     // persistent live-locked states
+bool llkLowRam;                                      // ro.config.low_ram
+bool khtEnable = LLK_ENABLE_DEFAULT;                 // [khungtaskd] panic
+// [khungtaskd] should have a timeout beyond the granularity of llkTimeoutMs.
+// Provides a wide angle of margin b/c khtTimeout is also its granularity.
+seconds khtTimeout = duration_cast<seconds>(llkTimeoutMs * (1 + LLK_CHECKS_PER_TIMEOUT_DEFAULT) /
+                                            LLK_CHECKS_PER_TIMEOUT_DEFAULT);
+
+// Blacklist variables, initialized with comma separated lists of high false
+// positive and/or dangerous references, e.g. without self restart, for pid,
+// ppid, name and uid:
+
+// list of pids, or tids or names to skip. kernel pid (0), init pid (1),
+// [kthreadd] pid (2), ourselves, "init", "[kthreadd]", "lmkd", "llkd" or
+// combinations of watchdogd in kernel and user space.
+std::unordered_set<std::string> llkBlacklistProcess;
+// list of parent pids, comm or cmdline names to skip. default:
+// kernel pid (0), [kthreadd] (2), or ourselves, enforced and implied
+std::unordered_set<std::string> llkBlacklistParent;
+// list of uids, and uid names, to skip, default nothing
+std::unordered_set<std::string> llkBlacklistUid;
+
+class dir {
+  public:
+    enum level { proc, task, numLevels };
+
+  private:
+    int fd;
+    size_t available_bytes;
+    dirent* next;
+    // each directory level picked to be just north of 4K in size
+    static constexpr size_t buffEntries = 15;
+    static dirent buff[numLevels][buffEntries];
+
+    bool fill(enum level index) {
+        if (index >= numLevels) return false;
+        if (available_bytes != 0) return true;
+        if (__predict_false(fd < 0)) return false;
+        // getdents64 has no libc wrapper
+        auto rc = TEMP_FAILURE_RETRY(syscall(__NR_getdents64, fd, buff[index], sizeof(buff[0]), 0));
+        if (rc <= 0) return false;
+        available_bytes = rc;
+        next = buff[index];
+        return true;
+    }
+
+  public:
+    dir() : fd(-1), available_bytes(0), next(nullptr) {}
+
+    explicit dir(const char* directory)
+        : fd(__predict_true(directory != nullptr)
+                 ? ::open(directory, O_CLOEXEC | O_DIRECTORY | O_RDONLY)
+                 : -1),
+          available_bytes(0),
+          next(nullptr) {}
+
+    explicit dir(const std::string&& directory)
+        : fd(::open(directory.c_str(), O_CLOEXEC | O_DIRECTORY | O_RDONLY)),
+          available_bytes(0),
+          next(nullptr) {}
+
+    explicit dir(const std::string& directory)
+        : fd(::open(directory.c_str(), O_CLOEXEC | O_DIRECTORY | O_RDONLY)),
+          available_bytes(0),
+          next(nullptr) {}
+
+    // Don't need any copy or move constructors.
+    explicit dir(const dir& c) = delete;
+    explicit dir(dir& c) = delete;
+    explicit dir(dir&& c) = delete;
+
+    ~dir() {
+        if (fd >= 0) {
+            ::close(fd);
+        }
+    }
+
+    operator bool() const { return fd >= 0; }
+
+    void reset(void) {
+        if (fd >= 0) {
+            ::close(fd);
+            fd = -1;
+            available_bytes = 0;
+            next = nullptr;
+        }
+    }
+
+    dir& reset(const char* directory) {
+        reset();
+        // available_bytes will _always_ be zero here as its value is
+        // intimately tied to fd < 0 or not.
+        fd = ::open(directory, O_CLOEXEC | O_DIRECTORY | O_RDONLY);
+        return *this;
+    }
+
+    void rewind(void) {
+        if (fd >= 0) {
+            ::lseek(fd, off_t(0), SEEK_SET);
+            available_bytes = 0;
+            next = nullptr;
+        }
+    }
+
+    dirent* read(enum level index = proc, dirent* def = nullptr) {
+        if (!fill(index)) return def;
+        auto ret = next;
+        available_bytes -= next->d_reclen;
+        next = reinterpret_cast<dirent*>(reinterpret_cast<char*>(next) + next->d_reclen);
+        return ret;
+    }
+} llkTopDirectory;
+
+dirent dir::buff[dir::numLevels][dir::buffEntries];
+
+// helper functions
+
+bool llkIsMissingExeLink(pid_t tid) {
+    char c;
+    // CAP_SYS_PTRACE is required to prevent ret == -1, but ENOENT is signal
+    auto ret = ::readlink((procdir + std::to_string(tid) + "/exe").c_str(), &c, sizeof(c));
+    return (ret == -1) && (errno == ENOENT);
+}
+
+// Common routine where caller accepts empty content as error/passthrough.
+// Reduces the churn of reporting read errors in the callers.
+std::string ReadFile(std::string&& path) {
+    std::string content;
+    if (!android::base::ReadFileToString(path, &content)) {
+        PLOG(DEBUG) << "Read " << path << " failed";
+        content = "";
+    }
+    return content;
+}
+
+std::string llkProcGetName(pid_t tid, const char* node = "/cmdline") {
+    std::string content = ReadFile(procdir + std::to_string(tid) + node);
+    static constexpr char needles[] = " \t\r\n";  // including trailing nul
+    auto pos = content.find_first_of(needles, 0, sizeof(needles));
+    if (pos != std::string::npos) {
+        content.erase(pos);
+    }
+    return content;
+}
+
+uid_t llkProcGetUid(pid_t tid) {
+    // Get the process' uid.  The following read from /status is admittedly
+    // racy, prone to corruption due to shape-changes.  The consequences are
+    // not catastrophic as we sample a few times before taking action.
+    //
+    // If /loginuid worked on reliably, or on Android (all tasks report -1)...
+    // Android lmkd causes /cgroup to contain memory:/<dom>/uid_<uid>/pid_<pid>
+    // which is tighter, but also not reliable.
+    std::string content = ReadFile(procdir + std::to_string(tid) + "/status");
+    static constexpr char Uid[] = "\nUid:";
+    auto pos = content.find(Uid);
+    if (pos == std::string::npos) {
+        return -1;
+    }
+    pos += ::strlen(Uid);
+    while ((pos < content.size()) && ::isblank(content[pos])) {
+        ++pos;
+    }
+    content.erase(0, pos);
+    for (pos = 0; (pos < content.size()) && ::isdigit(content[pos]); ++pos) {
+        ;
+    }
+    // Content of form 'Uid:	0	0	0	0', newline is error
+    if ((pos >= content.size()) || !::isblank(content[pos])) {
+        return -1;
+    }
+    content.erase(pos);
+    uid_t ret;
+    if (!android::base::ParseInt(content, &ret, uid_t(0))) {
+        return -1;
+    }
+    return ret;
+}
+
+struct proc {
+    pid_t tid;                     // monitored thread id (in Z or D state).
+    nanoseconds schedUpdate;       // /proc/<tid>/sched "se.avg.lastUpdateTime",
+    uint64_t nrSwitches;           // /proc/<tid>/sched "nr_switches" for
+                                   // refined ABA problem detection, determine
+                                   // forward scheduling progress.
+    milliseconds update;           // llkUpdate millisecond signature of last.
+    milliseconds count;            // duration in state.
+    pid_t pid;                     // /proc/<pid> before iterating through
+                                   // /proc/<pid>/task/<tid> for threads.
+    pid_t ppid;                    // /proc/<tid>/stat field 4 parent pid.
+    uid_t uid;                     // /proc/<tid>/status Uid: field.
+    unsigned time;                 // sum of /proc/<tid>/stat field 14 utime &
+                                   // 15 stime for coarse ABA problem detection.
+    std::string cmdline;           // cached /cmdline content
+    char state;                    // /proc/<tid>/stat field 3: Z or D
+                                   // (others we do not monitor: S, R, T or ?)
+    char comm[TASK_COMM_LEN + 3];  // space for adding '[' and ']'
+    bool exeMissingValid;          // exeMissing has been cached
+    bool cmdlineValid;             // cmdline has been cached
+    bool updated;                  // cleared before monitoring pass.
+    bool killed;                   // sent a kill to this thread, next panic...
+
+    void setComm(const char* _comm) { strncpy(comm + 1, _comm, sizeof(comm) - 2); }
+
+    proc(pid_t tid, pid_t pid, pid_t ppid, const char* _comm, int time, char state)
+        : tid(tid),
+          schedUpdate(0),
+          nrSwitches(0),
+          update(llkUpdate),
+          count(0),
+          pid(pid),
+          ppid(ppid),
+          uid(-1),
+          time(time),
+          state(state),
+          exeMissingValid(false),
+          cmdlineValid(false),
+          updated(true),
+          killed(!llkTestWithKill) {
+        memset(comm, '\0', sizeof(comm));
+        setComm(_comm);
+    }
+
+    const char* getComm(void) {
+        if (comm[1] == '\0') {  // comm Valid?
+            strncpy(comm + 1, llkProcGetName(tid, "/comm").c_str(), sizeof(comm) - 2);
+        }
+        if (!exeMissingValid) {
+            if (llkIsMissingExeLink(tid)) {
+                comm[0] = '[';
+            }
+            exeMissingValid = true;
+        }
+        size_t len = strlen(comm + 1);
+        if (__predict_true(len < (sizeof(comm) - 1))) {
+            if (comm[0] == '[') {
+                if ((comm[len] != ']') && __predict_true(len < (sizeof(comm) - 2))) {
+                    comm[++len] = ']';
+                    comm[++len] = '\0';
+                }
+            } else {
+                if (comm[len] == ']') {
+                    comm[len] = '\0';
+                }
+            }
+        }
+        return &comm[comm[0] != '['];
+    }
+
+    const char* getCmdline(void) {
+        if (!cmdlineValid) {
+            cmdline = llkProcGetName(tid);
+            cmdlineValid = true;
+        }
+        return cmdline.c_str();
+    }
+
+    uid_t getUid(void) {
+        if (uid <= 0) {  // Churn on root user, because most likely to setuid()
+            uid = llkProcGetUid(tid);
+        }
+        return uid;
+    }
+
+    void reset(void) {  // reset cache, if we detected pid rollover
+        uid = -1;
+        state = '?';
+        cmdline = "";
+        comm[0] = '\0';
+        exeMissingValid = false;
+        cmdlineValid = false;
+    }
+};
+
+std::unordered_map<pid_t, proc> tids;
+
+// Check range and setup defaults, in order of propagation:
+//     llkTimeoutMs
+//     llkCheckMs
+//     ...
+// KISS to keep it all self-contained, and called multiple times as parameters
+// are interpreted so that defaults, llkCheckMs and llkCycle make sense.
+void llkValidate() {
+    if (llkTimeoutMs == 0ms) {
+        llkTimeoutMs = LLK_TIMEOUT_MS_DEFAULT;
+    }
+    llkTimeoutMs = std::max(llkTimeoutMs, LLK_TIMEOUT_MS_MINIMUM);
+    if (llkCheckMs == 0ms) {
+        llkCheckMs = llkTimeoutMs / LLK_CHECKS_PER_TIMEOUT_DEFAULT;
+    }
+    llkCheckMs = std::min(llkCheckMs, llkTimeoutMs);
+
+    for (size_t state = 0; state < ARRAY_SIZE(llkStateTimeoutMs); ++state) {
+        if (llkStateTimeoutMs[state] == 0ms) {
+            llkStateTimeoutMs[state] = llkTimeoutMs;
+        }
+        llkStateTimeoutMs[state] =
+            std::min(std::max(llkStateTimeoutMs[state], LLK_TIMEOUT_MS_MINIMUM), llkTimeoutMs);
+        llkCheckMs = std::min(llkCheckMs, llkStateTimeoutMs[state]);
+    }
+
+    llkCheckMs = std::max(llkCheckMs, LLK_CHECK_MS_MINIMUM);
+    if (llkCycle == 0ms) {
+        llkCycle = llkCheckMs;
+    }
+    llkCycle = std::min(llkCycle, llkCheckMs);
+}
+
+milliseconds llkGetTimespecDiffMs(timespec* from, timespec* to) {
+    return duration_cast<milliseconds>(seconds(to->tv_sec - from->tv_sec)) +
+           duration_cast<milliseconds>(nanoseconds(to->tv_nsec - from->tv_nsec));
+}
+
+std::string llkProcGetName(pid_t tid, const char* comm, const char* cmdline) {
+    if ((cmdline != nullptr) && (*cmdline != '\0')) {
+        return cmdline;
+    }
+    if ((comm != nullptr) && (*comm != '\0')) {
+        return comm;
+    }
+
+    // UNLIKELY! Here because killed before we kill it?
+    // Assume change is afoot, do not call llkTidAlloc
+
+    // cmdline ?
+    std::string content = llkProcGetName(tid);
+    if (content.size() != 0) {
+        return content;
+    }
+    // Comm instead?
+    content = llkProcGetName(tid, "/comm");
+    if (llkIsMissingExeLink(tid) && (content.size() != 0)) {
+        return '[' + content + ']';
+    }
+    return content;
+}
+
+int llkKillOneProcess(pid_t pid, char state, pid_t tid, const char* tcomm = nullptr,
+                      const char* tcmdline = nullptr, const char* pcomm = nullptr,
+                      const char* pcmdline = nullptr) {
+    std::string forTid;
+    if (tid != pid) {
+        forTid = " for '" + llkProcGetName(tid, tcomm, tcmdline) + "' (" + std::to_string(tid) + ")";
+    }
+    LOG(INFO) << "Killing '" << llkProcGetName(pid, pcomm, pcmdline) << "' (" << pid
+              << ") to check forward scheduling progress in " << state << " state" << forTid;
+    // CAP_KILL required
+    errno = 0;
+    auto r = ::kill(pid, SIGKILL);
+    if (r) {
+        PLOG(ERROR) << "kill(" << pid << ")=" << r << ' ';
+    }
+
+    return r;
+}
+
+// Kill one process
+int llkKillOneProcess(pid_t pid, proc* tprocp) {
+    return llkKillOneProcess(pid, tprocp->state, tprocp->tid, tprocp->getComm(),
+                             tprocp->getCmdline());
+}
+
+// Kill one process specified by kprocp
+int llkKillOneProcess(proc* kprocp, proc* tprocp) {
+    if (kprocp == nullptr) {
+        return -2;
+    }
+
+    return llkKillOneProcess(kprocp->tid, tprocp->state, tprocp->tid, tprocp->getComm(),
+                             tprocp->getCmdline(), kprocp->getComm(), kprocp->getCmdline());
+}
+
+// Acquire file descriptor from environment, or open and cache it.
+// NB: cache is unnecessary in our current context, pedantically
+//     required to prevent leakage of file descriptors in the future.
+int llkFileToWriteFd(const std::string& file) {
+    static std::unordered_map<std::string, int> cache;
+    auto search = cache.find(file);
+    if (search != cache.end()) return search->second;
+    auto fd = android_get_control_file(file.c_str());
+    if (fd >= 0) return fd;
+    fd = TEMP_FAILURE_RETRY(::open(file.c_str(), O_WRONLY | O_CLOEXEC));
+    if (fd >= 0) cache.emplace(std::make_pair(file, fd));
+    return fd;
+}
+
+// Wrap android::base::WriteStringToFile to use android_get_control_file.
+bool llkWriteStringToFile(const std::string& string, const std::string& file) {
+    auto fd = llkFileToWriteFd(file);
+    if (fd < 0) return false;
+    return android::base::WriteStringToFd(string, fd);
+}
+
+bool llkWriteStringToFileConfirm(const std::string& string, const std::string& file) {
+    auto fd = llkFileToWriteFd(file);
+    auto ret = (fd < 0) ? false : android::base::WriteStringToFd(string, fd);
+    std::string content;
+    if (!android::base::ReadFileToString(file, &content)) return ret;
+    return android::base::Trim(content) == string;
+}
+
+void llkPanicKernel(bool dump, pid_t tid, const char* state) __noreturn;
+void llkPanicKernel(bool dump, pid_t tid, const char* state) {
+    auto sysrqTriggerFd = llkFileToWriteFd("/proc/sysrq-trigger");
+    if (sysrqTriggerFd < 0) {
+        // DYB
+        llkKillOneProcess(initPid, 'R', tid);
+        // The answer to life, the universe and everything
+        ::exit(42);
+        // NOTREACHED
+    }
+    ::sync();
+    if (dump) {
+        // Show all locks that are held
+        android::base::WriteStringToFd("d", sysrqTriggerFd);
+        // This can trigger hardware watchdog, that is somewhat _ok_.
+        // But useless if pstore configured for <256KB, low ram devices ...
+        if (!llkLowRam) {
+            android::base::WriteStringToFd("t", sysrqTriggerFd);
+        }
+        ::usleep(200000);  // let everything settle
+    }
+    llkWriteStringToFile(std::string("SysRq : Trigger a crash : 'livelock,") + state + "'\n",
+                         "/dev/kmsg");
+    android::base::WriteStringToFd("c", sysrqTriggerFd);
+    // NOTREACHED
+    // DYB
+    llkKillOneProcess(initPid, 'R', tid);
+    // I sat at my desk, stared into the garden and thought '42 will do'.
+    // I typed it out. End of story
+    ::exit(42);
+    // NOTREACHED
+}
+
+void llkAlarmHandler(int) {
+    llkPanicKernel(false, ::getpid(), "alarm");
+}
+
+milliseconds GetUintProperty(const std::string& key, milliseconds def) {
+    return milliseconds(android::base::GetUintProperty(key, static_cast<uint64_t>(def.count()),
+                                                       static_cast<uint64_t>(def.max().count())));
+}
+
+seconds GetUintProperty(const std::string& key, seconds def) {
+    return seconds(android::base::GetUintProperty(key, static_cast<uint64_t>(def.count()),
+                                                  static_cast<uint64_t>(def.max().count())));
+}
+
+proc* llkTidLookup(pid_t tid) {
+    auto search = tids.find(tid);
+    if (search == tids.end()) {
+        return nullptr;
+    }
+    return &search->second;
+}
+
+void llkTidRemove(pid_t tid) {
+    tids.erase(tid);
+}
+
+proc* llkTidAlloc(pid_t tid, pid_t pid, pid_t ppid, const char* comm, int time, char state) {
+    auto it = tids.emplace(std::make_pair(tid, proc(tid, pid, ppid, comm, time, state)));
+    return &it.first->second;
+}
+
+std::string llkFormat(milliseconds ms) {
+    auto sec = duration_cast<seconds>(ms);
+    std::ostringstream s;
+    s << sec.count() << '.';
+    auto f = s.fill('0');
+    auto w = s.width(3);
+    s << std::right << (ms - sec).count();
+    s.width(w);
+    s.fill(f);
+    s << 's';
+    return s.str();
+}
+
+std::string llkFormat(seconds s) {
+    return std::to_string(s.count()) + 's';
+}
+
+std::string llkFormat(bool flag) {
+    return flag ? "true" : "false";
+}
+
+std::string llkFormat(const std::unordered_set<std::string>& blacklist) {
+    std::string ret;
+    for (auto entry : blacklist) {
+        if (ret.size()) {
+            ret += ",";
+        }
+        ret += entry;
+    }
+    return ret;
+}
+
+// We only officially support comma separators, but wetware being what they
+// are will take some liberty and I do not believe they should be punished.
+std::unordered_set<std::string> llkSplit(const std::string& s,
+                                         const std::string& delimiters = ", \t:") {
+    std::unordered_set<std::string> result;
+
+    size_t base = 0;
+    size_t found;
+    while (true) {
+        found = s.find_first_of(delimiters, base);
+        result.emplace(s.substr(base, found - base));
+        if (found == s.npos) break;
+        base = found + 1;
+    }
+    return result;
+}
+
+bool llkSkipName(const std::string& name,
+                 const std::unordered_set<std::string>& blacklist = llkBlacklistProcess) {
+    if ((name.size() == 0) || (blacklist.size() == 0)) {
+        return false;
+    }
+
+    return blacklist.find(name) != blacklist.end();
+}
+
+bool llkSkipPid(pid_t pid) {
+    return llkSkipName(std::to_string(pid), llkBlacklistProcess);
+}
+
+bool llkSkipPpid(pid_t ppid) {
+    return llkSkipName(std::to_string(ppid), llkBlacklistParent);
+}
+
+bool llkSkipUid(uid_t uid) {
+    // Match by number?
+    if (llkSkipName(std::to_string(uid), llkBlacklistUid)) {
+        return true;
+    }
+
+    // Match by name?
+    auto pwd = ::getpwuid(uid);
+    return (pwd != nullptr) && __predict_true(pwd->pw_name != nullptr) &&
+           __predict_true(pwd->pw_name[0] != '\0') && llkSkipName(pwd->pw_name, llkBlacklistUid);
+}
+
+bool getValidTidDir(dirent* dp, std::string* piddir) {
+    if (!::isdigit(dp->d_name[0])) {
+        return false;
+    }
+
+    // Corner case can not happen in reality b/c of above ::isdigit check
+    if (__predict_false(dp->d_type != DT_DIR)) {
+        if (__predict_false(dp->d_type == DT_UNKNOWN)) {  // can't b/c procfs
+            struct stat st;
+            *piddir = procdir;
+            *piddir += dp->d_name;
+            return (lstat(piddir->c_str(), &st) == 0) && (st.st_mode & S_IFDIR);
+        }
+        return false;
+    }
+
+    *piddir = procdir;
+    *piddir += dp->d_name;
+    return true;
+}
+
+bool llkIsMonitorState(char state) {
+    return (state == 'Z') || (state == 'D');
+}
+
+// returns -1 if not found
+long long getSchedValue(const std::string& schedString, const char* key) {
+    auto pos = schedString.find(key);
+    if (pos == std::string::npos) {
+        return -1;
+    }
+    pos = schedString.find(':', pos);
+    if (__predict_false(pos == std::string::npos)) {
+        return -1;
+    }
+    while ((++pos < schedString.size()) && ::isblank(schedString[pos])) {
+        ;
+    }
+    long long ret;
+    if (!android::base::ParseInt(schedString.substr(pos), &ret, static_cast<long long>(0))) {
+        return -1;
+    }
+    return ret;
+}
+
+// Primary ABA mitigation watching last time schedule activity happened
+void llkCheckSchedUpdate(proc* procp, const std::string& piddir) {
+    // Audit finds /proc/<tid>/sched is just over 1K, and
+    // is rarely larger than 2K, even less on Android.
+    // For example, the "se.avg.lastUpdateTime" field we are
+    // interested in typically within the primary set in
+    // the first 1K.
+    //
+    // Proc entries can not be read >1K atomically via libbase,
+    // but if there are problems we assume at least a few
+    // samples of reads occur before we take any real action.
+    std::string schedString = ReadFile(piddir + "/sched");
+    if (schedString.size() == 0) {
+        // /schedstat is not as standardized, but in 3.1+
+        // Android devices, the third field is nr_switches
+        // from /sched:
+        schedString = ReadFile(piddir + "/schedstat");
+        if (schedString.size() == 0) {
+            return;
+        }
+        auto val = static_cast<unsigned long long>(-1);
+        if (((::sscanf(schedString.c_str(), "%*d %*d %llu", &val)) == 1) &&
+            (val != static_cast<unsigned long long>(-1)) && (val != 0) &&
+            (val != procp->nrSwitches)) {
+            procp->nrSwitches = val;
+            procp->count = 0ms;
+            procp->killed = !llkTestWithKill;
+        }
+        return;
+    }
+
+    auto val = getSchedValue(schedString, "\nse.avg.lastUpdateTime");
+    if (val == -1) {
+        val = getSchedValue(schedString, "\nse.svg.last_update_time");
+    }
+    if (val != -1) {
+        auto schedUpdate = nanoseconds(val);
+        if (schedUpdate != procp->schedUpdate) {
+            procp->schedUpdate = schedUpdate;
+            procp->count = 0ms;
+            procp->killed = !llkTestWithKill;
+        }
+    }
+
+    val = getSchedValue(schedString, "\nnr_switches");
+    if (val != -1) {
+        if (static_cast<uint64_t>(val) != procp->nrSwitches) {
+            procp->nrSwitches = val;
+            procp->count = 0ms;
+            procp->killed = !llkTestWithKill;
+        }
+    }
+}
+
+void llkLogConfig(void) {
+    LOG(INFO) << "ro.config.low_ram=" << llkFormat(llkLowRam) << "\n"
+              << LLK_ENABLE_PROPERTY "=" << llkFormat(llkEnable) << "\n"
+              << KHT_ENABLE_PROPERTY "=" << llkFormat(khtEnable) << "\n"
+              << LLK_MLOCKALL_PROPERTY "=" << llkFormat(llkMlockall) << "\n"
+              << LLK_KILLTEST_PROPERTY "=" << llkFormat(llkTestWithKill) << "\n"
+              << KHT_TIMEOUT_PROPERTY "=" << llkFormat(khtTimeout) << "\n"
+              << LLK_TIMEOUT_MS_PROPERTY "=" << llkFormat(llkTimeoutMs) << "\n"
+              << LLK_D_TIMEOUT_MS_PROPERTY "=" << llkFormat(llkStateTimeoutMs[llkStateD]) << "\n"
+              << LLK_Z_TIMEOUT_MS_PROPERTY "=" << llkFormat(llkStateTimeoutMs[llkStateZ]) << "\n"
+              << LLK_CHECK_MS_PROPERTY "=" << llkFormat(llkCheckMs) << "\n"
+              << LLK_BLACKLIST_PROCESS_PROPERTY "=" << llkFormat(llkBlacklistProcess) << "\n"
+              << LLK_BLACKLIST_PARENT_PROPERTY "=" << llkFormat(llkBlacklistParent) << "\n"
+              << LLK_BLACKLIST_UID_PROPERTY "=" << llkFormat(llkBlacklistUid);
+}
+
+void* llkThread(void* obj) {
+    LOG(INFO) << "started";
+
+    std::string name = std::to_string(::gettid());
+    if (!llkSkipName(name)) {
+        llkBlacklistProcess.emplace(name);
+    }
+    name = static_cast<const char*>(obj);
+    prctl(PR_SET_NAME, name.c_str());
+    if (__predict_false(!llkSkipName(name))) {
+        llkBlacklistProcess.insert(name);
+    }
+    // No longer modifying llkBlacklistProcess.
+    llkRunning = true;
+    llkLogConfig();
+    while (llkRunning) {
+        ::usleep(duration_cast<microseconds>(llkCheck(true)).count());
+    }
+    // NOTREACHED
+    LOG(INFO) << "exiting";
+    return nullptr;
+}
+
+}  // namespace
+
+milliseconds llkCheck(bool checkRunning) {
+    if (!llkEnable || (checkRunning != llkRunning)) {
+        return milliseconds::max();
+    }
+
+    // Reset internal watchdog, which is a healthy engineering margin of
+    // double the maximum wait or cycle time for the mainloop that calls us.
+    //
+    // This alarm is effectively the live lock detection of llkd, as
+    // we understandably can not monitor ourselves otherwise.
+    ::alarm(duration_cast<seconds>(llkTimeoutMs * 2).count());
+
+    // kernel jiffy precision fastest acquisition
+    static timespec last;
+    timespec now;
+    ::clock_gettime(CLOCK_MONOTONIC_COARSE, &now);
+    auto ms = llkGetTimespecDiffMs(&last, &now);
+    if (ms < llkCycle) {
+        return llkCycle - ms;
+    }
+    last = now;
+
+    LOG(VERBOSE) << "opendir(\"" << procdir << "\")";
+    if (__predict_false(!llkTopDirectory)) {
+        // gid containing AID_READPROC required
+        llkTopDirectory.reset(procdir);
+        if (__predict_false(!llkTopDirectory)) {
+            // Most likely reason we could be here is a resource limit.
+            // Keep our processing down to a minimum, but not so low that
+            // we do not recover in a timely manner should the issue be
+            // transitory.
+            LOG(DEBUG) << "opendir(\"" << procdir << "\") failed";
+            return llkTimeoutMs;
+        }
+    }
+
+    for (auto& it : tids) {
+        it.second.updated = false;
+    }
+
+    auto prevUpdate = llkUpdate;
+    llkUpdate += ms;
+    ms -= llkCycle;
+    auto myPid = ::getpid();
+    auto myTid = ::gettid();
+    for (auto dp = llkTopDirectory.read(); dp != nullptr; dp = llkTopDirectory.read()) {
+        std::string piddir;
+
+        if (!getValidTidDir(dp, &piddir)) {
+            continue;
+        }
+
+        // Get the process tasks
+        std::string taskdir = piddir + "/task/";
+        int pid = -1;
+        LOG(VERBOSE) << "+opendir(\"" << taskdir << "\")";
+        dir taskDirectory(taskdir);
+        if (__predict_false(!taskDirectory)) {
+            LOG(DEBUG) << "+opendir(\"" << taskdir << "\") failed";
+        }
+        for (auto tp = taskDirectory.read(dir::task, dp); tp != nullptr;
+             tp = taskDirectory.read(dir::task)) {
+            if (!getValidTidDir(tp, &piddir)) {
+                continue;
+            }
+
+            // Get the process stat
+            std::string stat = ReadFile(piddir + "/stat");
+            if (stat.size() == 0) {
+                continue;
+            }
+            unsigned tid = -1;
+            char pdir[TASK_COMM_LEN + 1];
+            char state = '?';
+            unsigned ppid = -1;
+            unsigned utime = -1;
+            unsigned stime = -1;
+            int dummy;
+            pdir[0] = '\0';
+            // tid should not change value
+            auto match = ::sscanf(
+                stat.c_str(),
+                "%u (%" ___STRING(
+                    TASK_COMM_LEN) "[^)]) %c %u %*d %*d %*d %*d %*d %*d %*d %*d %*d %u %u %d",
+                &tid, pdir, &state, &ppid, &utime, &stime, &dummy);
+            if (pid == -1) {
+                pid = tid;
+            }
+            LOG(VERBOSE) << "match " << match << ' ' << tid << " (" << pdir << ") " << state << ' '
+                         << ppid << " ... " << utime << ' ' << stime << ' ' << dummy;
+            if (match != 7) {
+                continue;
+            }
+
+            auto procp = llkTidLookup(tid);
+            if (procp == nullptr) {
+                procp = llkTidAlloc(tid, pid, ppid, pdir, utime + stime, state);
+            } else {
+                // comm can change ...
+                procp->setComm(pdir);
+                procp->updated = true;
+                // pid/ppid/tid wrap?
+                if (((procp->update != prevUpdate) && (procp->update != llkUpdate)) ||
+                    (procp->ppid != ppid) || (procp->pid != pid)) {
+                    procp->reset();
+                } else if (procp->time != (utime + stime)) {  // secondary ABA.
+                    // watching utime+stime granularity jiffy
+                    procp->state = '?';
+                }
+                procp->update = llkUpdate;
+                procp->pid = pid;
+                procp->ppid = ppid;
+                procp->time = utime + stime;
+                if (procp->state != state) {
+                    procp->count = 0ms;
+                    procp->killed = !llkTestWithKill;
+                    procp->state = state;
+                } else {
+                    procp->count += llkCycle;
+                }
+            }
+
+            // Filter checks in intuitive order of CPU cost to evaluate
+            // If tid unique continue, if ppid or pid unique break
+
+            if (pid == myPid) {
+                break;
+            }
+            if (!llkIsMonitorState(state)) {
+                continue;
+            }
+            if ((tid == myTid) || llkSkipPid(tid)) {
+                continue;
+            }
+            if (llkSkipPpid(ppid)) {
+                break;
+            }
+
+            if (llkSkipName(procp->getComm())) {
+                continue;
+            }
+            if (llkSkipName(procp->getCmdline())) {
+                break;
+            }
+
+            auto pprocp = llkTidLookup(ppid);
+            if (pprocp == nullptr) {
+                pprocp = llkTidAlloc(ppid, ppid, 0, "", 0, '?');
+            }
+            if ((pprocp != nullptr) && (llkSkipName(pprocp->getComm(), llkBlacklistParent) ||
+                                        llkSkipName(pprocp->getCmdline(), llkBlacklistParent))) {
+                break;
+            }
+
+            if ((llkBlacklistUid.size() != 0) && llkSkipUid(procp->getUid())) {
+                continue;
+            }
+
+            // ABA mitigation watching last time schedule activity happened
+            llkCheckSchedUpdate(procp, piddir);
+
+            // Can only fall through to here if registered D or Z state !!!
+            if (procp->count < llkStateTimeoutMs[(state == 'Z') ? llkStateZ : llkStateD]) {
+                LOG(VERBOSE) << state << ' ' << llkFormat(procp->count) << ' ' << ppid << "->"
+                             << pid << "->" << tid << ' ' << procp->getComm();
+                continue;
+            }
+
+            // We have to kill it to determine difference between live lock
+            // and persistent state blocked on a resource.  Is there something
+            // wrong with a process that has no forward scheduling progress in
+            // Z or D?  Yes, generally means improper accounting in the
+            // process, but not always ...
+            //
+            // Whomever we hit with a test kill must accept the Android
+            // Aphorism that everything can be burned to the ground and
+            // must survive.
+            if (procp->killed == false) {
+                procp->killed = true;
+                // confirm: re-read uid before committing to a panic.
+                procp->uid = -1;
+                switch (state) {
+                    case 'Z':  // kill ppid to free up a Zombie
+                        // Killing init will kernel panic without diagnostics
+                        // so skip right to controlled kernel panic with
+                        // diagnostics.
+                        if (ppid == initPid) {
+                            break;
+                        }
+                        LOG(WARNING) << "Z " << llkFormat(procp->count) << ' ' << ppid << "->"
+                                     << pid << "->" << tid << ' ' << procp->getComm() << " [kill]";
+                        if ((llkKillOneProcess(pprocp, procp) >= 0) ||
+                            (llkKillOneProcess(ppid, procp) >= 0)) {
+                            continue;
+                        }
+                        break;
+
+                    case 'D':  // kill tid to free up an uninterruptible D
+                        // If ABA is doing its job, we would not need or
+                        // want the following.  Test kill is a Hail Mary
+                        // to make absolutely sure there is no forward
+                        // scheduling progress.  The cost when ABA is
+                        // not working is we kill a process that likes to
+                        // stay in 'D' state, instead of panicing the
+                        // kernel (worse).
+                        LOG(WARNING) << "D " << llkFormat(procp->count) << ' ' << pid << "->" << tid
+                                     << ' ' << procp->getComm() << " [kill]";
+                        if ((llkKillOneProcess(llkTidLookup(pid), procp) >= 0) ||
+                            (llkKillOneProcess(pid, 'D', tid) >= 0) ||
+                            (llkKillOneProcess(procp, procp) >= 0) ||
+                            (llkKillOneProcess(tid, 'D', tid) >= 0)) {
+                            continue;
+                        }
+                        break;
+                }
+            }
+            // We are here because we have confirmed kernel live-lock
+            LOG(ERROR) << state << ' ' << llkFormat(procp->count) << ' ' << ppid << "->" << pid
+                       << "->" << tid << ' ' << procp->getComm() << " [panic]";
+            llkPanicKernel(true, tid, (state == 'Z') ? "zombie" : "driver");
+        }
+        LOG(VERBOSE) << "+closedir()";
+    }
+    llkTopDirectory.rewind();
+    LOG(VERBOSE) << "closedir()";
+
+    // garbage collection of old process references
+    for (auto p = tids.begin(); p != tids.end();) {
+        if (!p->second.updated) {
+            IF_ALOG(LOG_VERBOSE, LOG_TAG) {
+                std::string ppidCmdline = llkProcGetName(p->second.ppid, nullptr, nullptr);
+                if (ppidCmdline.size()) {
+                    ppidCmdline = "(" + ppidCmdline + ")";
+                }
+                std::string pidCmdline;
+                if (p->second.pid != p->second.tid) {
+                    pidCmdline = llkProcGetName(p->second.pid, nullptr, p->second.getCmdline());
+                    if (pidCmdline.size()) {
+                        pidCmdline = "(" + pidCmdline + ")";
+                    }
+                }
+                std::string tidCmdline =
+                    llkProcGetName(p->second.tid, p->second.getComm(), p->second.getCmdline());
+                if (tidCmdline.size()) {
+                    tidCmdline = "(" + tidCmdline + ")";
+                }
+                LOG(VERBOSE) << "thread " << p->second.ppid << ppidCmdline << "->" << p->second.pid
+                             << pidCmdline << "->" << p->second.tid << tidCmdline << " removed";
+            }
+            p = tids.erase(p);
+        } else {
+            ++p;
+        }
+    }
+    if (__predict_false(tids.empty())) {
+        llkTopDirectory.reset();
+    }
+
+    llkCycle = llkCheckMs;
+
+    timespec end;
+    ::clock_gettime(CLOCK_MONOTONIC_COARSE, &end);
+    auto milli = llkGetTimespecDiffMs(&now, &end);
+    LOG((milli > 10s) ? ERROR : (milli > 1s) ? WARNING : VERBOSE) << "sample " << llkFormat(milli);
+
+    // cap to minimum sleep for 1 second since last cycle
+    if (llkCycle < (ms + 1s)) {
+        return 1s;
+    }
+    return llkCycle - ms;
+}
+
+unsigned llkCheckMilliseconds() {
+    return duration_cast<milliseconds>(llkCheck()).count();
+}
+
+bool llkInit(const char* threadname) {
+    llkLowRam = android::base::GetBoolProperty("ro.config.low_ram", false);
+    if (!LLK_ENABLE_DEFAULT && android::base::GetBoolProperty("ro.debuggable", false)) {
+        llkEnable = android::base::GetProperty(LLK_ENABLE_PROPERTY, "eng") == "eng";
+        khtEnable = android::base::GetProperty(KHT_ENABLE_PROPERTY, "eng") == "eng";
+    }
+    llkEnable = android::base::GetBoolProperty(LLK_ENABLE_PROPERTY, llkEnable);
+    if (llkEnable && !llkTopDirectory.reset(procdir)) {
+        // Most likely reason we could be here is llkd was started
+        // incorrectly without the readproc permissions.  Keep our
+        // processing down to a minimum.
+        llkEnable = false;
+    }
+    khtEnable = android::base::GetBoolProperty(KHT_ENABLE_PROPERTY, khtEnable);
+    llkMlockall = android::base::GetBoolProperty(LLK_MLOCKALL_PROPERTY, llkMlockall);
+    llkTestWithKill = android::base::GetBoolProperty(LLK_KILLTEST_PROPERTY, llkTestWithKill);
+    // if LLK_TIMOUT_MS_PROPERTY was not set, we will use a set
+    // KHT_TIMEOUT_PROPERTY as co-operative guidance for the default value.
+    khtTimeout = GetUintProperty(KHT_TIMEOUT_PROPERTY, khtTimeout);
+    if (khtTimeout == 0s) {
+        khtTimeout = duration_cast<seconds>(llkTimeoutMs * (1 + LLK_CHECKS_PER_TIMEOUT_DEFAULT) /
+                                            LLK_CHECKS_PER_TIMEOUT_DEFAULT);
+    }
+    llkTimeoutMs =
+        khtTimeout * LLK_CHECKS_PER_TIMEOUT_DEFAULT / (1 + LLK_CHECKS_PER_TIMEOUT_DEFAULT);
+    llkTimeoutMs = GetUintProperty(LLK_TIMEOUT_MS_PROPERTY, llkTimeoutMs);
+    llkValidate();  // validate llkTimeoutMs, llkCheckMs and llkCycle
+    llkStateTimeoutMs[llkStateD] = GetUintProperty(LLK_D_TIMEOUT_MS_PROPERTY, llkTimeoutMs);
+    llkStateTimeoutMs[llkStateZ] = GetUintProperty(LLK_Z_TIMEOUT_MS_PROPERTY, llkTimeoutMs);
+    llkCheckMs = GetUintProperty(LLK_CHECK_MS_PROPERTY, llkCheckMs);
+    llkValidate();  // validate all (effectively minus llkTimeoutMs)
+    std::string defaultBlacklistProcess(
+        std::to_string(kernelPid) + "," + std::to_string(initPid) + "," +
+        std::to_string(kthreaddPid) + "," + std::to_string(::getpid()) + "," +
+        std::to_string(::gettid()) + "," LLK_BLACKLIST_PROCESS_DEFAULT);
+    if (threadname) {
+        defaultBlacklistProcess += std::string(",") + threadname;
+    }
+    for (int cpu = 1; cpu < get_nprocs_conf(); ++cpu) {
+        defaultBlacklistProcess += ",[watchdog/" + std::to_string(cpu) + "]";
+    }
+    defaultBlacklistProcess =
+        android::base::GetProperty(LLK_BLACKLIST_PROCESS_PROPERTY, defaultBlacklistProcess);
+    llkBlacklistProcess = llkSplit(defaultBlacklistProcess);
+    if (!llkSkipName("[khungtaskd]")) {  // ALWAYS ignore as special
+        llkBlacklistProcess.emplace("[khungtaskd]");
+    }
+    llkBlacklistParent = llkSplit(android::base::GetProperty(
+        LLK_BLACKLIST_PARENT_PROPERTY, std::to_string(kernelPid) + "," + std::to_string(kthreaddPid) +
+                                           "," LLK_BLACKLIST_PARENT_DEFAULT));
+    llkBlacklistUid =
+        llkSplit(android::base::GetProperty(LLK_BLACKLIST_UID_PROPERTY, LLK_BLACKLIST_UID_DEFAULT));
+
+    // internal watchdog
+    ::signal(SIGALRM, llkAlarmHandler);
+
+    // kernel hung task configuration? Otherwise leave it as-is
+    if (khtEnable) {
+        // EUID must be AID_ROOT to write to /proc/sys/kernel/ nodes, there
+        // are no capability overrides.  For security reasons we do not want
+        // to run as AID_ROOT.  We may not be able to write them successfully,
+        // we will try, but the least we can do is read the values back to
+        // confirm expectations and report whether configured or not.
+        auto configured = llkWriteStringToFileConfirm(std::to_string(khtTimeout.count()),
+                                                      "/proc/sys/kernel/hung_task_timeout_secs");
+        if (configured) {
+            llkWriteStringToFile("65535", "/proc/sys/kernel/hung_task_warnings");
+            llkWriteStringToFile("65535", "/proc/sys/kernel/hung_task_check_count");
+            configured = llkWriteStringToFileConfirm("1", "/proc/sys/kernel/hung_task_panic");
+        }
+        if (configured) {
+            LOG(INFO) << "[khungtaskd] configured";
+        } else {
+            LOG(WARNING) << "[khungtaskd] not configurable";
+        }
+    }
+
+    bool logConfig = true;
+    if (llkEnable) {
+        if (llkMlockall &&
+            // 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
+            mlockall(MCL_CURRENT | MCL_FUTURE | MCL_ONFAULT) && (errno != EINVAL)) {
+            PLOG(WARNING) << "mlockall failed ";
+        }
+
+        if (threadname) {
+            pthread_attr_t attr;
+
+            if (!pthread_attr_init(&attr)) {
+                sched_param param;
+
+                memset(&param, 0, sizeof(param));
+                pthread_attr_setschedparam(&attr, &param);
+                pthread_attr_setschedpolicy(&attr, SCHED_BATCH);
+                if (!pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED)) {
+                    pthread_t thread;
+                    if (!pthread_create(&thread, &attr, llkThread, const_cast<char*>(threadname))) {
+                        // wait a second for thread to start
+                        for (auto retry = 50; retry && !llkRunning; --retry) {
+                            ::usleep(20000);
+                        }
+                        logConfig = !llkRunning;  // printed in llkd context?
+                    } else {
+                        LOG(ERROR) << "failed to spawn llkd thread";
+                    }
+                } else {
+                    LOG(ERROR) << "failed to detach llkd thread";
+                }
+                pthread_attr_destroy(&attr);
+            } else {
+                LOG(ERROR) << "failed to allocate attibutes for llkd thread";
+            }
+        }
+    } else {
+        LOG(DEBUG) << "[khungtaskd] left unconfigured";
+    }
+    if (logConfig) {
+        llkLogConfig();
+    }
+
+    return llkEnable;
+}
diff --git a/llkd/llkd.cpp b/llkd/llkd.cpp
new file mode 100644
index 0000000..f10253d
--- /dev/null
+++ b/llkd/llkd.cpp
@@ -0,0 +1,50 @@
+/*
+ * 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 "llkd.h"
+
+#include <sched.h>
+#include <unistd.h>
+
+#include <chrono>
+
+#include <android-base/logging.h>
+
+using namespace std::chrono;
+
+int main(int, char**) {
+    LOG(INFO) << "started";
+
+    bool enabled = llkInit();
+
+    // Would like this policy to be automatic as part of libllkd,
+    // but that would be presumptuous and bad side-effect.
+    struct sched_param param;
+    memset(&param, 0, sizeof(param));
+    sched_setscheduler(0, SCHED_BATCH, &param);
+
+    while (true) {
+        if (enabled) {
+            ::usleep(duration_cast<microseconds>(llkCheck()).count());
+        } else {
+            ::pause();
+        }
+    }
+    // NOTREACHED
+
+    LOG(INFO) << "exiting";
+    return 0;
+}
diff --git a/llkd/llkd.rc b/llkd/llkd.rc
new file mode 100644
index 0000000..e538cdb
--- /dev/null
+++ b/llkd/llkd.rc
@@ -0,0 +1,49 @@
+# eng default for ro.llk.enable and ro.khungtask.enable
+on property:ro.debuggable=*
+    setprop llk.enable ${ro.llk.enable:-0}
+    setprop khungtask.enable ${ro.khungtask.enable:-0}
+
+on property:ro.debuggable=1
+    setprop llk.enable ${ro.llk.enable:-1}
+    setprop khungtask.enable ${ro.khungtask.enable:-1}
+
+on property:ro.llk.enable=eng
+    setprop llk.enable ${ro.debuggable:-0}
+
+on property:ro.khungtask.enable=eng
+    setprop khungtask.enable ${ro.debuggable:-0}
+
+on property:llk.enable=1
+    setprop llk.enable true
+
+on property:llk.enable=0
+    setprop llk.enable false
+
+on property:khungtask.enable=1
+    setprop khungtask.enable true
+
+on property:khungtask.enable=0
+    setprop khungtask.enable false
+
+# Configure [khungtaskd]
+on property:khungtask.enable=true
+    write /proc/sys/kernel/hung_task_timeout_secs ${ro.khungtask.timeout:-720}
+    write /proc/sys/kernel/hung_task_warnings 65535
+    write /proc/sys/kernel/hung_task_check_count 65535
+    write /proc/sys/kernel/hung_task_panic 1
+
+on property:khungtask.enable=false
+    write /proc/sys/kernel/hung_task_panic 0
+
+on property:llk.enable=true
+    start llkd
+
+service llkd /system/bin/llkd
+    class late_start
+    disabled
+    user llkd
+    group llkd readproc
+    capabilities KILL IPC_LOCK
+    file /dev/kmsg w
+    file /proc/sysrq-trigger w
+    writepid /dev/cpuset/system-background/tasks
diff --git a/llkd/tests/Android.bp b/llkd/tests/Android.bp
new file mode 100644
index 0000000..6dd5938
--- /dev/null
+++ b/llkd/tests/Android.bp
@@ -0,0 +1,41 @@
+// 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: "llkd_unit_test",
+
+    shared_libs: [
+        "libbase",
+        "liblog",
+    ],
+    header_libs: [
+        "llkd_headers",
+    ],
+
+    target: {
+        android: {
+            srcs: [
+                "llkd_test.cpp",
+            ],
+        },
+    },
+
+    cflags: [
+        "-Wall",
+        "-Wextra",
+        "-Werror",
+    ],
+
+    compile_multilib: "first",
+}
diff --git a/llkd/tests/llkd_test.cpp b/llkd/tests/llkd_test.cpp
new file mode 100644
index 0000000..3a15ff1
--- /dev/null
+++ b/llkd/tests/llkd_test.cpp
@@ -0,0 +1,287 @@
+/*
+ * 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 <signal.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include <chrono>
+#include <iostream>
+#include <string>
+
+#include <android-base/properties.h>
+#include <gtest/gtest.h>
+#include <log/log_time.h>  // for MS_PER_SEC and US_PER_SEC
+
+#include "llkd.h"
+
+using namespace std::chrono;
+using namespace std::chrono_literals;
+
+namespace {
+
+milliseconds GetUintProperty(const std::string& key, milliseconds def) {
+    return milliseconds(android::base::GetUintProperty(key, static_cast<uint64_t>(def.count()),
+                                                       static_cast<uint64_t>(def.max().count())));
+}
+
+seconds GetUintProperty(const std::string& key, seconds def) {
+    return seconds(android::base::GetUintProperty(key, static_cast<uint64_t>(def.count()),
+                                                  static_cast<uint64_t>(def.max().count())));
+}
+
+// GTEST_LOG_(WARNING) output is fugly, this has much less noise
+// ToDo: look into fixing googletest to produce output that matches style of
+//       all the other status messages, and can switch off __line__ and
+//       __function__ noise
+#define GTEST_LOG_WARNING std::cerr << "[ WARNING  ] "
+#define GTEST_LOG_INFO std::cerr << "[   INFO   ] "
+
+// Properties is _not_ a high performance ABI!
+void rest() {
+    usleep(200000);
+}
+
+void execute(const char* command) {
+    if (getuid() || system(command)) {
+        system((std::string("su root ") + command).c_str());
+    }
+}
+
+seconds llkdSleepPeriod(char state) {
+    auto default_eng = android::base::GetProperty(LLK_ENABLE_PROPERTY, "eng") == "eng";
+    auto default_enable = LLK_ENABLE_DEFAULT;
+    if (!LLK_ENABLE_DEFAULT && default_eng &&
+        android::base::GetBoolProperty("ro.debuggable", false)) {
+        default_enable = true;
+    }
+    default_enable = android::base::GetBoolProperty(LLK_ENABLE_PROPERTY, default_enable);
+    if (default_eng) {
+        GTEST_LOG_INFO << LLK_ENABLE_PROPERTY " defaults to \"eng\" thus "
+                       << (default_enable ? "true" : "false") << "\n";
+    }
+    // Hail Mary hope is unconfigured.
+    if ((GetUintProperty(LLK_TIMEOUT_MS_PROPERTY, LLK_TIMEOUT_MS_DEFAULT) !=
+         duration_cast<milliseconds>(120s)) ||
+        (GetUintProperty(LLK_CHECK_MS_PROPERTY,
+                         LLK_TIMEOUT_MS_DEFAULT / LLK_CHECKS_PER_TIMEOUT_DEFAULT) !=
+         duration_cast<milliseconds>(10s))) {
+        execute("stop llkd");
+        rest();
+        std::string setprop("setprop ");
+        execute((setprop + LLK_ENABLE_WRITEABLE_PROPERTY + " false").c_str());
+        rest();
+        execute((setprop + LLK_TIMEOUT_MS_PROPERTY + " 120000").c_str());
+        rest();
+        execute((setprop + KHT_TIMEOUT_PROPERTY + " 130").c_str());
+        rest();
+        execute((setprop + LLK_CHECK_MS_PROPERTY + " 10000").c_str());
+        rest();
+        execute((setprop + LLK_ENABLE_PROPERTY + " true").c_str());
+        rest();
+        execute((setprop + LLK_ENABLE_WRITEABLE_PROPERTY + " true").c_str());
+        rest();
+    }
+    default_enable = LLK_ENABLE_DEFAULT;
+    if (!LLK_ENABLE_DEFAULT && (android::base::GetProperty(LLK_ENABLE_PROPERTY, "eng") == "eng") &&
+        android::base::GetBoolProperty("ro.debuggable", false)) {
+        default_enable = true;
+    }
+    default_enable = android::base::GetBoolProperty(LLK_ENABLE_PROPERTY, default_enable);
+    if (default_enable) {
+        execute("start llkd");
+        rest();
+        GTEST_LOG_INFO << "llkd enabled\n";
+    } else {
+        GTEST_LOG_WARNING << "llkd disabled\n";
+    }
+
+    /* KISS follows llk_init() */
+    milliseconds llkTimeoutMs = LLK_TIMEOUT_MS_DEFAULT;
+    seconds khtTimeout = duration_cast<seconds>(
+        llkTimeoutMs * (1 + LLK_CHECKS_PER_TIMEOUT_DEFAULT) / LLK_CHECKS_PER_TIMEOUT_DEFAULT);
+    khtTimeout = GetUintProperty(KHT_TIMEOUT_PROPERTY, khtTimeout);
+    llkTimeoutMs =
+        khtTimeout * LLK_CHECKS_PER_TIMEOUT_DEFAULT / (1 + LLK_CHECKS_PER_TIMEOUT_DEFAULT);
+    llkTimeoutMs = GetUintProperty(LLK_TIMEOUT_MS_PROPERTY, llkTimeoutMs);
+    if (llkTimeoutMs < LLK_TIMEOUT_MS_MINIMUM) {
+        llkTimeoutMs = LLK_TIMEOUT_MS_MINIMUM;
+    }
+    milliseconds llkCheckMs = llkTimeoutMs / LLK_CHECKS_PER_TIMEOUT_DEFAULT;
+    auto timeout = GetUintProperty(
+        (state == 'Z') ? LLK_Z_TIMEOUT_MS_PROPERTY : LLK_D_TIMEOUT_MS_PROPERTY, llkTimeoutMs);
+    if (timeout < LLK_TIMEOUT_MS_MINIMUM) {
+        timeout = LLK_TIMEOUT_MS_MINIMUM;
+    }
+
+    if (llkCheckMs > timeout) {
+        llkCheckMs = timeout;
+    }
+    llkCheckMs = GetUintProperty(LLK_CHECK_MS_PROPERTY, llkCheckMs);
+    timeout += llkCheckMs;
+    auto sec = duration_cast<seconds>(timeout);
+    if (sec == 0s) {
+        ++sec;
+    } else if (sec > 59s) {
+        GTEST_LOG_WARNING << "llkd is configured for about " << duration_cast<minutes>(sec).count()
+                          << " minutes to react\n";
+    }
+
+    // 33% margin for the test to naturally timeout waiting for llkd to respond
+    return (sec * 4 + 2s) / 3;
+}
+
+inline void waitForPid(pid_t child_pid) {
+    int wstatus;
+    ASSERT_LE(0, waitpid(child_pid, &wstatus, 0));
+    EXPECT_FALSE(WIFEXITED(wstatus)) << "[   INFO   ] exit=" << WEXITSTATUS(wstatus);
+    ASSERT_TRUE(WIFSIGNALED(wstatus));
+    ASSERT_EQ(WTERMSIG(wstatus), SIGKILL);
+}
+
+bool checkKill(const char* reason) {
+    if (android::base::GetBoolProperty(LLK_KILLTEST_PROPERTY, LLK_KILLTEST_DEFAULT)) {
+        return false;
+    }
+    auto bootreason = android::base::GetProperty("sys.boot.reason", "nothing");
+    if (bootreason == reason) {
+        GTEST_LOG_INFO << "Expected test result confirmed " << reason << "\n";
+        return true;
+    }
+    GTEST_LOG_WARNING << "Expected test result is " << reason << "\n";
+
+    // apct adjustment if needed (set LLK_KILLTEST_PROPERTY to "off" to allow test)
+    //
+    // if (android::base::GetProperty(LLK_KILLTEST_PROPERTY, "") == "false") {
+    //     GTEST_LOG_WARNING << "Bypassing test\n";
+    //     return true;
+    // }
+
+    return false;
+}
+
+}  // namespace
+
+// The tests that use this helper are to simulate processes stuck in 'D'
+// state that are experiencing forward scheduled progress. As such the
+// expectation is that llkd will _not_ perform any mitigations. The sleepfor
+// argument helps us set the amount of forward scheduler progress.
+static void llkd_driver_ABA(const microseconds sleepfor) {
+    const auto period = llkdSleepPeriod('D');
+    if (period <= sleepfor) {
+        GTEST_LOG_WARNING << "llkd configuration too short for "
+                          << duration_cast<milliseconds>(sleepfor).count() << "ms work cycle\n";
+        return;
+    }
+
+    auto child_pid = fork();
+    ASSERT_LE(0, child_pid);
+    int wstatus;
+    if (!child_pid) {
+        auto ratio = period / sleepfor;
+        ASSERT_LT(0, ratio);
+        // vfork() parent is uninterruptable D state waiting for child to exec()
+        while (--ratio > 0) {
+            auto driver_pid = vfork();
+            ASSERT_LE(0, driver_pid);
+            if (driver_pid) {  // parent
+                waitpid(driver_pid, &wstatus, 0);
+                if (!WIFEXITED(wstatus)) {
+                    exit(42);
+                }
+                if (WEXITSTATUS(wstatus) != 42) {
+                    exit(42);
+                }
+            } else {
+                usleep(sleepfor.count());
+                exit(42);
+            }
+        }
+        exit(0);
+    }
+    ASSERT_LE(0, waitpid(child_pid, &wstatus, 0));
+    EXPECT_TRUE(WIFEXITED(wstatus));
+    if (WIFEXITED(wstatus)) {
+        EXPECT_EQ(0, WEXITSTATUS(wstatus));
+    }
+    ASSERT_FALSE(WIFSIGNALED(wstatus)) << "[   INFO   ] signo=" << WTERMSIG(wstatus);
+}
+
+TEST(llkd, driver_ABA_fast) {
+    llkd_driver_ABA(5ms);
+}
+
+TEST(llkd, driver_ABA_slow) {
+    llkd_driver_ABA(1s);
+}
+
+TEST(llkd, driver_ABA_glacial) {
+    llkd_driver_ABA(1min);
+}
+
+// Following tests must be last in this file to capture possible errant
+// kernel_panic mitigation failure.
+
+// The following tests simulate processes stick in 'Z' or 'D' state with
+// no forward scheduling progress, but interruptible. As such the expectation
+// is that llkd will perform kill mitigation and not progress to kernel_panic.
+
+TEST(llkd, zombie) {
+    if (checkKill("kernel_panic,sysrq,livelock,zombie")) {
+        return;
+    }
+
+    const auto period = llkdSleepPeriod('Z');
+
+    /* Create a Persistent Zombie Process */
+    pid_t child_pid = fork();
+    ASSERT_LE(0, child_pid);
+    if (!child_pid) {
+        auto zombie_pid = fork();
+        ASSERT_LE(0, zombie_pid);
+        if (!zombie_pid) {
+            sleep(1);
+            exit(0);
+        }
+        sleep(period.count());
+        exit(42);
+    }
+
+    waitForPid(child_pid);
+}
+
+TEST(llkd, driver) {
+    if (checkKill("kernel_panic,sysrq,livelock,driver")) {
+        return;
+    }
+
+    const auto period = llkdSleepPeriod('D');
+
+    /* Create a Persistent Device Process */
+    auto child_pid = fork();
+    ASSERT_LE(0, child_pid);
+    if (!child_pid) {
+        // vfork() parent is uninterruptable D state waiting for child to exec()
+        auto driver_pid = vfork();
+        ASSERT_LE(0, driver_pid);
+        sleep(period.count());
+        exit(driver_pid ? 42 : 0);
+    }
+
+    waitForPid(child_pid);
+}
diff --git a/lmkd/Android.bp b/lmkd/Android.bp
index 0474ff5..1369b8b 100644
--- a/lmkd/Android.bp
+++ b/lmkd/Android.bp
@@ -3,8 +3,8 @@
 
     srcs: ["lmkd.c"],
     shared_libs: [
-        "liblog",
         "libcutils",
+        "liblog",
     ],
     static_libs: [
         "libstatslogc",
diff --git a/lmkd/lmkd.c b/lmkd/lmkd.c
index cc5a7c2..e984ac8 100644
--- a/lmkd/lmkd.c
+++ b/lmkd/lmkd.c
@@ -18,8 +18,10 @@
 
 #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>
@@ -27,8 +29,8 @@
 #include <sys/eventfd.h>
 #include <sys/mman.h>
 #include <sys/socket.h>
-#include <sys/types.h>
 #include <sys/sysinfo.h>
+#include <sys/types.h>
 #include <unistd.h>
 
 #include <cutils/properties.h>
@@ -70,17 +72,18 @@
 #define MEMINFO_PATH "/proc/meminfo"
 #define LINE_MAX 128
 
+/* 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 STRINGIFY(x) STRINGIFY_INTERNAL(x)
-#define STRINGIFY_INTERNAL(x) #x
+/* Defined as ProcessList.SYSTEM_ADJ in ProcessList.java */
+#define SYSTEM_ADJ (-900)
 
 /* default to old in-kernel interface if no memory pressure events */
-static int use_inkernel_interface = 1;
+static bool use_inkernel_interface = true;
 static bool has_inkernel_module;
 
 /* memory pressure levels */
@@ -417,24 +420,32 @@
     return 0;
 }
 
-static void writefilestring(const char *path, char *s) {
+/*
+ * 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);
-    int len = strlen(s);
-    int ret;
+    ssize_t len = strlen(s);
+    ssize_t ret;
 
     if (fd < 0) {
-        ALOGE("Error opening %s; errno=%d", path, errno);
-        return;
+        if (err_if_missing) {
+            ALOGE("Error opening %s; errno=%d", path, errno);
+        }
+        return false;
     }
 
-    ret = write(fd, s, len);
+    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=%d", path, ret);
+        ALOGE("Short write on %s; length=%zd", path, ret);
     }
 
     close(fd);
+    return true;
 }
 
 static void cmd_procprio(LMKD_CTRL_PACKET packet) {
@@ -443,6 +454,8 @@
     char val[20];
     int soft_limit_mult;
     struct lmk_procprio params;
+    bool is_system_server;
+    struct passwd *pwdrec;
 
     lmkd_pack_get_procprio(packet, &params);
 
@@ -452,12 +465,21 @@
         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);
-    writefilestring(path, val);
-
-    if (use_inkernel_interface)
+    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 (low_ram_device) {
         if (params.oomadj >= 900) {
@@ -488,11 +510,19 @@
             soft_limit_mult = 64;
         }
 
-        snprintf(path, sizeof(path),
-             "/dev/memcg/apps/uid_%d/pid_%d/memory.soft_limit_in_bytes",
-             params.uid, params.pid);
+        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);
-        writefilestring(path, val);
+
+        /*
+         * 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);
@@ -517,8 +547,9 @@
 static void cmd_procremove(LMKD_CTRL_PACKET packet) {
     struct lmk_procremove params;
 
-    if (use_inkernel_interface)
+    if (use_inkernel_interface) {
         return;
+    }
 
     lmkd_pack_get_procremove(packet, &params);
     pid_remove(params.pid);
@@ -560,8 +591,8 @@
             strlcat(killpriostr, val, sizeof(killpriostr));
         }
 
-        writefilestring(INKERNEL_MINFREE_PATH, minfreestr);
-        writefilestring(INKERNEL_ADJ_PATH, killpriostr);
+        writefilestring(INKERNEL_MINFREE_PATH, minfreestr, true);
+        writefilestring(INKERNEL_ADJ_PATH, killpriostr, true);
     }
 }
 
@@ -698,10 +729,10 @@
 
 #ifdef LMKD_LOG_STATS
 static void memory_stat_parse_line(char *line, struct memory_stat *mem_st) {
-    char key[LINE_MAX + 1];
+    char key[LINE_MAX];
     int64_t value;
 
-    sscanf(line, "%" STRINGIFY(LINE_MAX) "s  %" SCNd64 "", key, &value);
+    sscanf(line,"%s  %" SCNd64 "", key, &value);
 
     if (strcmp(key, "total_") < 0) {
         return;
@@ -888,6 +919,7 @@
     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)
@@ -911,6 +943,7 @@
     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)
@@ -989,10 +1022,11 @@
 
     TRACE_KILL_START(pid);
 
+    /* CAP_KILL required */
     r = kill(pid, SIGKILL);
     ALOGI(
         "Killing '%s' (%d), uid %d, adj %d\n"
-        "   to free %ldkB because system is under %s memory pressure oom_adj %d\n",
+        "   to free %ldkB because system is under %s memory pressure (min_oom_adj=%d)\n",
         taskname, pid, uid, procp->oomadj, tasksize * page_k,
         level_name[level], min_score_adj);
     pid_remove(pid);
@@ -1345,6 +1379,7 @@
     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);
@@ -1547,21 +1582,32 @@
     statslog_init(&log_ctx, &enable_stats_log);
 #endif
 
-    // 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.
-    if (mlockall(MCL_CURRENT | MCL_FUTURE | MCL_ONFAULT) && errno != EINVAL)
-        ALOGW("mlockall failed: errno=%d", errno);
+    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));
+            }
 
-    sched_setscheduler(0, SCHED_FIFO, &param);
-    if (!init())
+            /* 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);
diff --git a/lmkd/lmkd.rc b/lmkd/lmkd.rc
index 3bb84ab..76b6055 100644
--- a/lmkd/lmkd.rc
+++ b/lmkd/lmkd.rc
@@ -1,6 +1,8 @@
 service lmkd /system/bin/lmkd
     class core
-    group root readproc
+    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/tests/lmkd_test.cpp b/lmkd/tests/lmkd_test.cpp
index 4afaeb8..1996bae 100644
--- a/lmkd/tests/lmkd_test.cpp
+++ b/lmkd/tests/lmkd_test.cpp
@@ -215,6 +215,13 @@
     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);
 
@@ -287,12 +294,6 @@
         GTEST_LOG_(INFO) << "Must be userdebug build, terminating test";
         return;
     }
-    // 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;
-    }
 
     // if respawned test process then run the test and exit (no analysis)
     if (getenv(LMKDTEST_RESPAWN_FLAG) != NULL) {
diff --git a/logcat/.clang-format b/logcat/.clang-format
deleted file mode 100644
index 393c309..0000000
--- a/logcat/.clang-format
+++ /dev/null
@@ -1,11 +0,0 @@
-BasedOnStyle: Google
-AllowShortFunctionsOnASingleLine: false
-
-CommentPragmas: NOLINT:.*
-DerivePointerAlignment: false
-IndentWidth: 4
-PointerAlignment: Left
-TabWidth: 4
-PenaltyExcessCharacter: 32
-
-Cpp11BracedListStyle: false
diff --git a/logcat/Android.bp b/logcat/Android.bp
index 01beb53..b0563a6 100644
--- a/logcat/Android.bp
+++ b/logcat/Android.bp
@@ -1,5 +1,5 @@
 //
-// Copyright (C) 2006-2017 The Android Open Source Project
+// Copyright (C) 2006 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.
@@ -31,25 +31,13 @@
     logtags: ["event.logtags"],
 }
 
-cc_library {
-    name: "liblogcat",
-
-    defaults: ["logcat_defaults"],
-    srcs: [
-        "logcat.cpp",
-        "getopt_long.cpp",
-        "logcat_system.cpp",
-    ],
-    export_include_dirs: ["include"],
-}
-
 cc_binary {
     name: "logcat",
 
     defaults: ["logcat_defaults"],
-    shared_libs: ["liblogcat"],
     srcs: [
         "logcat_main.cpp",
+        "logcat.cpp",
     ],
 }
 
@@ -57,9 +45,9 @@
     name: "logcatd",
 
     defaults: ["logcat_defaults"],
-    shared_libs: ["liblogcat"],
     srcs: [
         "logcatd_main.cpp",
+        "logcat.cpp",
     ],
 }
 
diff --git a/logcat/getopt_long.cpp b/logcat/getopt_long.cpp
deleted file mode 100644
index da99906..0000000
--- a/logcat/getopt_long.cpp
+++ /dev/null
@@ -1,401 +0,0 @@
-/* $OpenBSD: getopt_long.c,v 1.26 2013/06/08 22:47:56 millert Exp $ */
-/* $NetBSD: getopt_long.c,v 1.15 2002/01/31 22:43:40 tv Exp $       */
-
-/*
- * Copyright (c) 2002 Todd C. Miller <Todd.Miller@courtesan.com>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * Sponsored in part by the Defense Advanced Research Projects
- * Agency (DARPA) and Air Force Research Laboratory, Air Force
- * Materiel Command, USAF, under agreement number F39502-99-1-0512.
- */
-/*-
- * Copyright (c) 2000 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by Dieter Baron and Thomas Klausner.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/cdefs.h>
-
-#include <log/getopt.h>
-
-#define PRINT_ERROR ((context->opterr) && (*options != ':'))
-
-#define FLAG_PERMUTE 0x01  // permute non-options to the end of argv
-#define FLAG_ALLARGS 0x02  // treat non-options as args to option "-1"
-
-// return values
-#define BADCH (int)'?'
-#define BADARG ((*options == ':') ? (int)':' : (int)'?')
-#define INORDER (int)1
-
-#define D_PREFIX 0
-#define DD_PREFIX 1
-#define W_PREFIX 2
-
-// Compute the greatest common divisor of a and b.
-static int gcd(int a, int b) {
-    int c = a % b;
-    while (c) {
-        a = b;
-        b = c;
-        c = a % b;
-    }
-    return b;
-}
-
-// Exchange the block from nonopt_start to nonopt_end with the block from
-// nonopt_end to opt_end (keeping the same order of arguments in each block).
-// Returns optind - (nonopt_end - nonopt_start) for convenience.
-static int permute_args(getopt_context* context, char* const* nargv) {
-    // compute lengths of blocks and number and size of cycles
-    int nnonopts = context->nonopt_end - context->nonopt_start;
-    int nopts = context->optind - context->nonopt_end;
-    int ncycle = gcd(nnonopts, nopts);
-    int cyclelen = (context->optind - context->nonopt_start) / ncycle;
-
-    for (int i = 0; i < ncycle; i++) {
-        int cstart = context->nonopt_end + i;
-        int pos = cstart;
-        for (int j = 0; j < cyclelen; j++) {
-            if (pos >= context->nonopt_end) {
-                pos -= nnonopts;
-            } else {
-                pos += nopts;
-            }
-            char* swap = nargv[pos];
-            const_cast<char**>(nargv)[pos] = nargv[cstart];
-            const_cast<char**>(nargv)[cstart] = swap;
-        }
-    }
-    return context->optind - (context->nonopt_end - context->nonopt_start);
-}
-
-// parse_long_options_r --
-//    Parse long options in argc/argv argument vector.
-// Returns -1 if short_too is set and the option does not match long_options.
-static int parse_long_options_r(char* const* nargv, const char* options,
-                                const struct option* long_options, int* idx,
-                                bool short_too, struct getopt_context* context) {
-    const char* current_argv = context->place;
-    const char* current_dash;
-    switch (context->dash_prefix) {
-        case D_PREFIX:
-            current_dash = "-";
-            break;
-        case DD_PREFIX:
-            current_dash = "--";
-            break;
-        case W_PREFIX:
-            current_dash = "-W ";
-            break;
-        default:
-            current_dash = "";
-            break;
-    }
-    context->optind++;
-
-    const char* has_equal;
-    size_t current_argv_len;
-    if (!!(has_equal = strchr(current_argv, '='))) {
-        // argument found (--option=arg)
-        current_argv_len = has_equal - current_argv;
-        has_equal++;
-    } else {
-        current_argv_len = strlen(current_argv);
-    }
-
-    int match = -1;
-    bool exact_match = false;
-    bool second_partial_match = false;
-    for (int i = 0; long_options[i].name; i++) {
-        // find matching long option
-        if (strncmp(current_argv, long_options[i].name, current_argv_len)) {
-            continue;
-        }
-
-        if (strlen(long_options[i].name) == current_argv_len) {
-            // exact match
-            match = i;
-            exact_match = true;
-            break;
-        }
-        // If this is a known short option, don't allow
-        // a partial match of a single character.
-        if (short_too && current_argv_len == 1) continue;
-
-        if (match == -1) {  // first partial match
-            match = i;
-        } else if (long_options[i].has_arg != long_options[match].has_arg ||
-                   long_options[i].flag != long_options[match].flag ||
-                   long_options[i].val != long_options[match].val) {
-            second_partial_match = true;
-        }
-    }
-    if (!exact_match && second_partial_match) {
-        // ambiguous abbreviation
-        if (PRINT_ERROR) {
-            fprintf(context->optstderr ?: stderr,
-                    "option `%s%.*s' is ambiguous", current_dash,
-                    (int)current_argv_len, current_argv);
-        }
-        context->optopt = 0;
-        return BADCH;
-    }
-    if (match != -1) {  // option found
-        if (long_options[match].has_arg == no_argument && has_equal) {
-            if (PRINT_ERROR) {
-                fprintf(context->optstderr ?: stderr,
-                        "option `%s%.*s' doesn't allow an argument",
-                        current_dash, (int)current_argv_len, current_argv);
-            }
-            // XXX: GNU sets optopt to val regardless of flag
-            context->optopt =
-                long_options[match].flag ? 0 : long_options[match].val;
-            return BADCH;
-        }
-        if (long_options[match].has_arg == required_argument ||
-            long_options[match].has_arg == optional_argument) {
-            if (has_equal) {
-                context->optarg = has_equal;
-            } else if (long_options[match].has_arg == required_argument) {
-                // optional argument doesn't use next nargv
-                context->optarg = nargv[context->optind++];
-            }
-        }
-        if ((long_options[match].has_arg == required_argument) &&
-            !context->optarg) {
-            // Missing argument; leading ':' indicates no error
-            // should be generated.
-            if (PRINT_ERROR) {
-                fprintf(context->optstderr ?: stderr,
-                        "option `%s%s' requires an argument", current_dash,
-                        current_argv);
-            }
-            // XXX: GNU sets optopt to val regardless of flag
-            context->optopt =
-                long_options[match].flag ? 0 : long_options[match].val;
-            context->optind--;
-            return BADARG;
-        }
-    } else {  // unknown option
-        if (short_too) {
-            context->optind--;
-            return -1;
-        }
-        if (PRINT_ERROR) {
-            fprintf(context->optstderr ?: stderr, "unrecognized option `%s%s'",
-                    current_dash, current_argv);
-        }
-        context->optopt = 0;
-        return BADCH;
-    }
-    if (idx) *idx = match;
-    if (long_options[match].flag) {
-        *long_options[match].flag = long_options[match].val;
-        return 0;
-    }
-    return long_options[match].val;
-}
-
-// getopt_long_r --
-//    Parse argc/argv argument vector.
-int getopt_long_r(int nargc, char* const* nargv, const char* options,
-                  const struct option* long_options, int* idx,
-                  struct getopt_context* context) {
-    if (!options) return -1;
-
-    // XXX Some GNU programs (like cvs) set optind to 0 instead of
-    // XXX using optreset.  Work around this braindamage.
-    if (!context->optind) context->optind = context->optreset = 1;
-
-    // Disable GNU extensions if options string begins with a '+'.
-    int flags = FLAG_PERMUTE;
-    if (*options == '-') {
-        flags |= FLAG_ALLARGS;
-    } else if (*options == '+') {
-        flags &= ~FLAG_PERMUTE;
-    }
-    if (*options == '+' || *options == '-') options++;
-
-    context->optarg = nullptr;
-    if (context->optreset) context->nonopt_start = context->nonopt_end = -1;
-start:
-    if (context->optreset || !*context->place) {  // update scanning pointer
-        context->optreset = 0;
-        if (context->optind >= nargc) {  // end of argument vector
-            context->place = EMSG;
-            if (context->nonopt_end != -1) {
-                // do permutation, if we have to
-                context->optind = permute_args(context, nargv);
-            } else if (context->nonopt_start != -1) {
-                // If we skipped non-options, set optind to the first of them.
-                context->optind = context->nonopt_start;
-            }
-            context->nonopt_start = context->nonopt_end = -1;
-            return -1;
-        }
-        if (*(context->place = nargv[context->optind]) != '-' ||
-            context->place[1] == '\0') {
-            context->place = EMSG;  // found non-option
-            if (flags & FLAG_ALLARGS) {
-                // GNU extension: return non-option as argument to option 1
-                context->optarg = nargv[context->optind++];
-                return INORDER;
-            }
-            if (!(flags & FLAG_PERMUTE)) {
-                // If no permutation wanted, stop parsing at first non-option.
-                return -1;
-            }
-            // do permutation
-            if (context->nonopt_start == -1) {
-                context->nonopt_start = context->optind;
-            } else if (context->nonopt_end != -1) {
-                context->nonopt_start = permute_args(context, nargv);
-                context->nonopt_end = -1;
-            }
-            context->optind++;
-            // process next argument
-            goto start;
-        }
-        if (context->nonopt_start != -1 && context->nonopt_end == -1) {
-            context->nonopt_end = context->optind;
-        }
-
-        // If we have "-" do nothing, if "--" we are done.
-        if (context->place[1] != '\0' && *++(context->place) == '-' &&
-            context->place[1] == '\0') {
-            context->optind++;
-            context->place = EMSG;
-            // We found an option (--), so if we skipped
-            // non-options, we have to permute.
-            if (context->nonopt_end != -1) {
-                context->optind = permute_args(context, nargv);
-            }
-            context->nonopt_start = context->nonopt_end = -1;
-            return -1;
-        }
-    }
-
-    int optchar;
-    // Check long options if:
-    //  1) we were passed some
-    //  2) the arg is not just "-"
-    //  3) either the arg starts with -- we are getopt_long_only()
-    if (long_options && context->place != nargv[context->optind] &&
-        (*context->place == '-')) {
-        bool short_too = false;
-        context->dash_prefix = D_PREFIX;
-        if (*context->place == '-') {
-            context->place++;  // --foo long option
-            context->dash_prefix = DD_PREFIX;
-        } else if (*context->place != ':' && strchr(options, *context->place)) {
-            short_too = true;  // could be short option too
-        }
-
-        optchar = parse_long_options_r(nargv, options, long_options, idx,
-                                       short_too, context);
-        if (optchar != -1) {
-            context->place = EMSG;
-            return optchar;
-        }
-    }
-
-    const char* oli;  // option letter list index
-    if ((optchar = (int)*(context->place)++) == (int)':' ||
-        (optchar == (int)'-' && *context->place != '\0') ||
-        !(oli = strchr(options, optchar))) {
-        // If the user specified "-" and  '-' isn't listed in
-        // options, return -1 (non-option) as per POSIX.
-        // Otherwise, it is an unknown option character (or ':').
-        if (optchar == (int)'-' && *context->place == '\0') return -1;
-        if (!*context->place) context->optind++;
-        if (PRINT_ERROR) {
-            fprintf(context->optstderr ?: stderr, "invalid option -- %c",
-                    optchar);
-        }
-        context->optopt = optchar;
-        return BADCH;
-    }
-
-    static const char recargchar[] = "option requires an argument -- %c";
-    if (long_options && optchar == 'W' && oli[1] == ';') {
-        // -W long-option
-        if (*context->place) {                      // no space
-            ;                                       // NOTHING
-        } else if (++(context->optind) >= nargc) {  // no arg
-            context->place = EMSG;
-            if (PRINT_ERROR) {
-                fprintf(context->optstderr ?: stderr, recargchar, optchar);
-            }
-            context->optopt = optchar;
-            return BADARG;
-        } else {  // white space
-            context->place = nargv[context->optind];
-        }
-        context->dash_prefix = W_PREFIX;
-        optchar = parse_long_options_r(nargv, options, long_options, idx, false,
-                                       context);
-        context->place = EMSG;
-        return optchar;
-    }
-    if (*++oli != ':') {  // doesn't take argument
-        if (!*context->place) context->optind++;
-    } else {  // takes (optional) argument
-        context->optarg = nullptr;
-        if (*context->place) {  // no white space
-            context->optarg = context->place;
-        } else if (oli[1] != ':') {              // arg not optional
-            if (++(context->optind) >= nargc) {  // no arg
-                context->place = EMSG;
-                if (PRINT_ERROR) {
-                    fprintf(context->optstderr ?: stderr, recargchar, optchar);
-                }
-                context->optopt = optchar;
-                return BADARG;
-            }
-            context->optarg = nargv[context->optind];
-        }
-        context->place = EMSG;
-        context->optind++;
-    }
-    // dump back option letter
-    return optchar;
-}
diff --git a/logcat/include/log/getopt.h b/logcat/include/log/getopt.h
deleted file mode 100644
index 0da2b10..0000000
--- a/logcat/include/log/getopt.h
+++ /dev/null
@@ -1,67 +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 _LOG_GETOPT_H_
-#define _LOG_GETOPT_H_
-
-#ifndef __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE
-#ifndef __ANDROID_API__
-#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 1
-#elif __ANDROID_API__ > 24 /* > Nougat */
-#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 1
-#else
-#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 0
-#endif
-#endif
-
-#if __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE
-
-#include <getopt.h>
-#include <sys/cdefs.h>
-
-struct getopt_context {
-    int opterr;
-    int optind;
-    int optopt;
-    int optreset;
-    const char* optarg;
-    FILE* optstderr; /* NULL defaults to stderr */
-    /* private */
-    const char* place;
-    int nonopt_start;
-    int nonopt_end;
-    int dash_prefix;
-    /* expansion space */
-    int __extra__;
-    void* __stuff__;
-};
-
-#define EMSG ""
-#define NO_PREFIX (-1)
-
-#define INIT_GETOPT_CONTEXT(context) \
-    context = { 1, 1, '?', 0, NULL, NULL, EMSG, -1, -1, NO_PREFIX, 0, NULL }
-
-__BEGIN_DECLS
-int getopt_long_r(int nargc, char* const* nargv, const char* options,
-                  const struct option* long_options, int* idx,
-                  struct getopt_context* context);
-
-__END_DECLS
-
-#endif /* __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE */
-
-#endif /* !_LOG_GETOPT_H_ */
diff --git a/logcat/include/log/logcat.h b/logcat/include/log/logcat.h
deleted file mode 100644
index 009672c..0000000
--- a/logcat/include/log/logcat.h
+++ /dev/null
@@ -1,122 +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.
- */
-
-#ifndef _LIBS_LOGCAT_H /* header boilerplate */
-#define _LIBS_LOGCAT_H
-
-#include <stdio.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifndef __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE
-#ifndef __ANDROID_API__
-#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 1
-#elif __ANDROID_API__ > 24 /* > Nougat */
-#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 1
-#else
-#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 0
-#endif
-#endif
-
-#if __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE
-
-/* For managing an in-process logcat function, rather than forking/execing
- *
- * It also serves as the basis for the logcat command.
- *
- * The following C API allows a logcat instance to be created, run
- * to completion, and then release all the associated resources.
- */
-
-/*
- * The opaque context
- */
-#ifndef __android_logcat_context_defined /* typedef boilerplate */
-#define __android_logcat_context_defined
-typedef struct android_logcat_context_internal* android_logcat_context;
-#endif
-
-/* 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);
-
-/* Will not block, performed in-process
- *
- * Starts a thread, opens a pipe, returns reading end fd, saves off argv.
- * The command supports 2>&1 (mix content) and 2>/dev/null (drop content) for
- * scripted error (stderr) redirection.
- */
-int android_logcat_run_command_thread(android_logcat_context ctx, int argc,
-                                      char* const* argv, char* const* envp);
-int android_logcat_run_command_thread_running(android_logcat_context ctx);
-
-/* 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);
-
-/* derived helpers */
-
-/*
- * In-process thread that acts like somewhat like libc-like system and popen
- * respectively.  Can not handle shell scripting, only pure calls to the
- * logcat operations. The android_logcat_system is a wrapper for the
- * create_android_logcat, android_logcat_run_command and android_logcat_destroy
- * API above.  The android_logcat_popen is a wrapper for the
- * android_logcat_run_command_thread API above.  The android_logcat_pclose is
- * a wrapper for a reasonable wait until output has subsided for command
- * completion, fclose on the FILE pointer and the android_logcat_destroy API.
- */
-int android_logcat_system(const char* command);
-FILE* android_logcat_popen(android_logcat_context* ctx, const char* command);
-int android_logcat_pclose(android_logcat_context* ctx, FILE* output);
-
-#endif /* __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _LIBS_LOGCAT_H */
diff --git a/logcat/logcat.cpp b/logcat/logcat.cpp
index ff85f54..0f56337 100644
--- a/logcat/logcat.cpp
+++ b/logcat/logcat.cpp
@@ -14,12 +14,15 @@
  * limitations under the License.
  */
 
+#include "logcat.h"
+
 #include <arpa/inet.h>
 #include <assert.h>
 #include <ctype.h>
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <getopt.h>
 #include <math.h>
 #include <pthread.h>
 #include <sched.h>
@@ -47,8 +50,6 @@
 #include <cutils/sched_policy.h>
 #include <cutils/sockets.h>
 #include <log/event_tag_map.h>
-#include <log/getopt.h>
-#include <log/logcat.h>
 #include <log/logprint.h>
 #include <private/android_logger.h>
 #include <system/thread_defs.h>
@@ -854,14 +855,8 @@
     // net for stability dealing with possible mistaken inputs.
     static const char delimiters[] = ",:; \t\n\r\f";
 
-    struct getopt_context optctx;
-    INIT_GETOPT_CONTEXT(optctx);
-    optctx.opterr = !!context->error;
-    optctx.optstderr = context->error;
-
-    for (;;) {
-        int ret;
-
+    optind = 0;
+    while (true) {
         int option_index = 0;
         // list of long-argument only strings for later comparison
         static const char pid_str[] = "pid";
@@ -902,19 +897,18 @@
         };
         // clang-format on
 
-        ret = getopt_long_r(argc, argv, ":cdDhLt:T:gG:sQf:r:n:v:b:BSpP:m:e:",
-                            long_options, &option_index, &optctx);
-        if (ret < 0) break;
+        int c = getopt_long(argc, argv, ":cdDhLt:T:gG:sQf:r:n:v:b:BSpP:m:e:", long_options,
+                            &option_index);
+        if (c == -1) break;
 
-        switch (ret) {
+        switch (c) {
             case 0:
                 // only long options
                 if (long_options[option_index].name == pid_str) {
                     // ToDo: determine runtime PID_MAX?
-                    if (!getSizeTArg(optctx.optarg, &pid, 1)) {
+                    if (!getSizeTArg(optarg, &pid, 1)) {
                         logcat_panic(context, HELP_TRUE, "%s %s out of range\n",
-                                     long_options[option_index].name,
-                                     optctx.optarg);
+                                     long_options[option_index].name, optarg);
                         goto exit;
                     }
                     break;
@@ -924,11 +918,9 @@
                             ANDROID_LOG_NONBLOCK;
                     // ToDo: implement API that supports setting a wrap timeout
                     size_t dummy = ANDROID_LOG_WRAP_DEFAULT_TIMEOUT;
-                    if (optctx.optarg &&
-                        !getSizeTArg(optctx.optarg, &dummy, 1)) {
+                    if (optarg && !getSizeTArg(optarg, &dummy, 1)) {
                         logcat_panic(context, HELP_TRUE, "%s %s out of range\n",
-                                     long_options[option_index].name,
-                                     optctx.optarg);
+                                     long_options[option_index].name, optarg);
                         goto exit;
                     }
                     if ((dummy != ANDROID_LOG_WRAP_DEFAULT_TIMEOUT) &&
@@ -949,8 +941,7 @@
                     break;
                 }
                 if (long_options[option_index].name == id_str) {
-                    setId = (optctx.optarg && optctx.optarg[0]) ? optctx.optarg
-                                                                : nullptr;
+                    setId = (optarg && optarg[0]) ? optarg : nullptr;
                 }
                 break;
 
@@ -978,32 +969,27 @@
                 mode |= ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK;
             // FALLTHRU
             case 'T':
-                if (strspn(optctx.optarg, "0123456789") !=
-                    strlen(optctx.optarg)) {
-                    char* cp = parseTime(tail_time, optctx.optarg);
+                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", ret,
-                                     optctx.optarg);
+                        logcat_panic(context, HELP_FALSE, "-%c \"%s\" not in time format\n", c,
+                                     optarg);
                         goto exit;
                     }
                     if (*cp) {
-                        char c = *cp;
+                        char ch = *cp;
                         *cp = '\0';
                         if (context->error) {
-                            fprintf(
-                                context->error,
-                                "WARNING: -%c \"%s\"\"%c%s\" time truncated\n",
-                                ret, optctx.optarg, c, cp + 1);
+                            fprintf(context->error, "WARNING: -%c \"%s\"\"%c%s\" time truncated\n",
+                                    c, optarg, ch, cp + 1);
                         }
-                        *cp = c;
+                        *cp = ch;
                     }
                 } else {
-                    if (!getSizeTArg(optctx.optarg, &tail_lines, 1)) {
+                    if (!getSizeTArg(optarg, &tail_lines, 1)) {
                         if (context->error) {
-                            fprintf(context->error,
-                                    "WARNING: -%c %s invalid, setting to 1\n",
-                                    ret, optctx.optarg);
+                            fprintf(context->error, "WARNING: -%c %s invalid, setting to 1\n", c,
+                                    optarg);
                         }
                         tail_lines = 1;
                     }
@@ -1015,21 +1001,19 @@
                 break;
 
             case 'e':
-                context->regex = new pcrecpp::RE(optctx.optarg);
+                context->regex = new pcrecpp::RE(optarg);
                 break;
 
             case 'm': {
-                if (!getSizeTArg(optctx.optarg, &context->maxCount)) {
+                if (!getSizeTArg(optarg, &context->maxCount)) {
                     logcat_panic(context, HELP_FALSE,
-                                 "-%c \"%s\" isn't an "
-                                 "integer greater than zero\n",
-                                 ret, optctx.optarg);
+                                 "-%c \"%s\" isn't an integer greater than zero\n", c, optarg);
                     goto exit;
                 }
             } break;
 
             case 'g':
-                if (!optctx.optarg) {
+                if (!optarg) {
                     getLogSize = true;
                     break;
                 }
@@ -1037,8 +1021,8 @@
 
             case 'G': {
                 char* cp;
-                if (strtoll(optctx.optarg, &cp, 0) > 0) {
-                    setLogSize = strtoll(optctx.optarg, &cp, 0);
+                if (strtoll(optarg, &cp, 0) > 0) {
+                    setLogSize = strtoll(optarg, &cp, 0);
                 } else {
                     setLogSize = 0;
                 }
@@ -1071,19 +1055,18 @@
             } break;
 
             case 'p':
-                if (!optctx.optarg) {
+                if (!optarg) {
                     getPruneList = true;
                     break;
                 }
             // FALLTHRU
 
             case 'P':
-                setPruneList = optctx.optarg;
+                setPruneList = optarg;
                 break;
 
             case 'b': {
-                std::unique_ptr<char, void (*)(void*)> buffers(
-                    strdup(optctx.optarg), free);
+                std::unique_ptr<char, void (*)(void*)> buffers(strdup(optarg), free);
                 char* arg = buffers.get();
                 unsigned idMask = 0;
                 char* sv = nullptr;  // protect against -ENOMEM above
@@ -1147,40 +1130,33 @@
 
             case 'f':
                 if ((tail_time == log_time::EPOCH) && !tail_lines) {
-                    tail_time = lastLogTime(optctx.optarg);
+                    tail_time = lastLogTime(optarg);
                 }
                 // redirect output to a file
-                context->outputFileName = optctx.optarg;
+                context->outputFileName = optarg;
                 break;
 
             case 'r':
-                if (!getSizeTArg(optctx.optarg, &context->logRotateSizeKBytes,
-                                 1)) {
-                    logcat_panic(context, HELP_TRUE,
-                                 "Invalid parameter \"%s\" to -r\n",
-                                 optctx.optarg);
+                if (!getSizeTArg(optarg, &context->logRotateSizeKBytes, 1)) {
+                    logcat_panic(context, HELP_TRUE, "Invalid parameter \"%s\" to -r\n", optarg);
                     goto exit;
                 }
                 break;
 
             case 'n':
-                if (!getSizeTArg(optctx.optarg, &context->maxRotatedLogs, 1)) {
-                    logcat_panic(context, HELP_TRUE,
-                                 "Invalid parameter \"%s\" to -n\n",
-                                 optctx.optarg);
+                if (!getSizeTArg(optarg, &context->maxRotatedLogs, 1)) {
+                    logcat_panic(context, HELP_TRUE, "Invalid parameter \"%s\" to -n\n", optarg);
                     goto exit;
                 }
                 break;
 
             case 'v': {
-                if (!strcmp(optctx.optarg, "help") ||
-                    !strcmp(optctx.optarg, "--help")) {
+                if (!strcmp(optarg, "help") || !strcmp(optarg, "--help")) {
                     show_format_help(context);
                     context->retval = EXIT_SUCCESS;
                     goto exit;
                 }
-                std::unique_ptr<char, void (*)(void*)> formats(
-                    strdup(optctx.optarg), free);
+                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))) {
@@ -1300,8 +1276,7 @@
                 break;
 
             case ':':
-                logcat_panic(context, HELP_TRUE,
-                             "Option -%c needs an argument\n", optctx.optopt);
+                logcat_panic(context, HELP_TRUE, "Option -%c needs an argument\n", optopt);
                 goto exit;
 
             case 'h':
@@ -1310,8 +1285,7 @@
                 goto exit;
 
             default:
-                logcat_panic(context, HELP_TRUE, "Unrecognized Option %c\n",
-                             optctx.optopt);
+                logcat_panic(context, HELP_TRUE, "Unrecognized Option %c\n", optopt);
                 goto exit;
         }
     }
@@ -1400,7 +1374,7 @@
                          "Invalid filter expression in logcat args\n");
             goto exit;
         }
-    } else if (argc == optctx.optind) {
+    } else if (argc == optind) {
         // Add from environment variable
         const char* env_tags_orig = android::getenv(context, "ANDROID_LOG_TAGS");
 
@@ -1416,7 +1390,7 @@
         }
     } else {
         // Add from commandline
-        for (int i = optctx.optind ; i < argc ; i++) {
+        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
@@ -1707,105 +1681,6 @@
     return __logcat(context);
 }
 
-// starts a thread, opens a pipe, returns reading end.
-int android_logcat_run_command_thread(android_logcat_context ctx,
-                                      int argc, char* const* argv,
-                                      char* const* envp) {
-    android_logcat_context_internal* context = ctx;
-
-    int save_errno = EBUSY;
-    if ((context->fds[0] >= 0) || (context->fds[1] >= 0)) goto exit;
-
-    if (pipe(context->fds) < 0) {
-        save_errno = errno;
-        goto exit;
-    }
-
-    pthread_attr_t attr;
-    if (pthread_attr_init(&attr)) {
-        save_errno = errno;
-        goto close_exit;
-    }
-
-    struct sched_param param;
-    memset(&param, 0, sizeof(param));
-    pthread_attr_setschedparam(&attr, &param);
-    pthread_attr_setschedpolicy(&attr, SCHED_BATCH);
-    if (pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED)) {
-        save_errno = errno;
-        goto pthread_attr_exit;
-    }
-
-    context->stop = false;
-    context->thread_stopped = false;
-    context->output_fd = context->fds[1];
-    // save off arguments so they remain while thread is active.
-    for (int i = 0; i < argc; ++i) {
-        context->args.push_back(std::string(argv[i]));
-    }
-    // save off environment so they remain while thread is active.
-    if (envp) for (size_t i = 0; envp[i]; ++i) {
-        context->envs.push_back(std::string(envp[i]));
-    }
-
-    for (auto& str : context->args) {
-        context->argv_hold.push_back(str.c_str());
-    }
-    context->argv_hold.push_back(nullptr);
-    for (auto& str : context->envs) {
-        context->envp_hold.push_back(str.c_str());
-    }
-    context->envp_hold.push_back(nullptr);
-
-    context->argc = context->argv_hold.size() - 1;
-    context->argv = (char* const*)&context->argv_hold[0];
-    context->envp = (char* const*)&context->envp_hold[0];
-
-#ifdef DEBUG
-    fprintf(stderr, "argv[%d] = {", context->argc);
-    for (auto str : context->argv_hold) {
-        fprintf(stderr, " \"%s\"", str ?: "nullptr");
-    }
-    fprintf(stderr, " }\n");
-    fflush(stderr);
-#endif
-    context->retval = EXIT_SUCCESS;
-    if (pthread_create(&context->thr, &attr,
-                       (void*(*)(void*))__logcat, context)) {
-        save_errno = errno;
-        goto argv_exit;
-    }
-    pthread_attr_destroy(&attr);
-
-    return context->fds[0];
-
-argv_exit:
-    context->argv_hold.clear();
-    context->args.clear();
-    context->envp_hold.clear();
-    context->envs.clear();
-pthread_attr_exit:
-    pthread_attr_destroy(&attr);
-close_exit:
-    close(context->fds[0]);
-    context->fds[0] = -1;
-    close(context->fds[1]);
-    context->fds[1] = -1;
-exit:
-    errno = save_errno;
-    context->stop = true;
-    context->thread_stopped = true;
-    context->retval = EXIT_FAILURE;
-    return -1;
-}
-
-// test if the thread is still doing 'stuff'
-int android_logcat_run_command_thread_running(android_logcat_context ctx) {
-    android_logcat_context_internal* context = ctx;
-
-    return context->thread_stopped == false;
-}
-
 // Finished with context
 int android_logcat_destroy(android_logcat_context* ctx) {
     android_logcat_context_internal* context = *ctx;
diff --git a/logcat/logcat.h b/logcat/logcat.h
new file mode 100644
index 0000000..85ed7da
--- /dev/null
+++ b/logcat/logcat.h
@@ -0,0 +1,60 @@
+/*
+ * 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
index 9477e79..ecfa2ba 100644
--- a/logcat/logcat_main.cpp
+++ b/logcat/logcat_main.cpp
@@ -17,7 +17,7 @@
 #include <signal.h>
 #include <stdlib.h>
 
-#include <log/logcat.h>
+#include "logcat.h"
 
 int main(int argc, char** argv, char** envp) {
     android_logcat_context ctx = create_android_logcat();
diff --git a/logcat/logcat_system.cpp b/logcat/logcat_system.cpp
deleted file mode 100644
index 6dfd110..0000000
--- a/logcat/logcat_system.cpp
+++ /dev/null
@@ -1,153 +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 <ctype.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <string>
-#include <vector>
-
-#include <log/logcat.h>
-
-static std::string unquote(const char*& cp, const char*& delim) {
-    if ((*cp == '\'') || (*cp == '"')) {
-        // KISS: Simple quotes. Do not handle the case
-        //       of concatenation like "blah"foo'bar'
-        char quote = *cp++;
-        delim = strchr(cp, quote);
-        if (!delim) delim = cp + strlen(cp);
-        std::string str(cp, delim);
-        if (*delim) ++delim;
-        return str;
-    }
-    delim = strpbrk(cp, " \t\f\r\n");
-    if (!delim) delim = cp + strlen(cp);
-    return std::string(cp, delim);
-}
-
-static bool __android_logcat_parse(const char* command,
-                                   std::vector<std::string>& args,
-                                   std::vector<std::string>& envs) {
-    for (const char *delim, *cp = command; cp && *cp; cp = delim) {
-        while (isspace(*cp)) ++cp;
-        if ((args.size() == 0) && (*cp != '=') && !isdigit(*cp)) {
-            const char* env = cp;
-            while (isalnum(*cp) || (*cp == '_')) ++cp;
-            if (cp && (*cp == '=')) {
-                std::string str(env, ++cp);
-                str += unquote(cp, delim);
-                envs.push_back(str);
-                continue;
-            }
-            cp = env;
-        }
-        args.push_back(unquote(cp, delim));
-        if ((args.size() == 1) && (args[0] != "logcat") &&
-            (args[0] != "/system/bin/logcat")) {
-            return false;
-        }
-    }
-    return args.size() != 0;
-}
-
-FILE* android_logcat_popen(android_logcat_context* ctx, const char* command) {
-    *ctx = NULL;
-
-    std::vector<std::string> args;
-    std::vector<std::string> envs;
-    if (!__android_logcat_parse(command, args, envs)) return NULL;
-
-    std::vector<const char*> argv;
-    for (auto& str : args) {
-        argv.push_back(str.c_str());
-    }
-    argv.push_back(NULL);
-
-    std::vector<const char*> envp;
-    for (auto& str : envs) {
-        envp.push_back(str.c_str());
-    }
-    envp.push_back(NULL);
-
-    *ctx = create_android_logcat();
-    if (!*ctx) return NULL;
-
-    int fd = android_logcat_run_command_thread(
-        *ctx, argv.size() - 1, (char* const*)&argv[0], (char* const*)&envp[0]);
-    argv.clear();
-    args.clear();
-    envp.clear();
-    envs.clear();
-    if (fd < 0) {
-        android_logcat_destroy(ctx);
-        return NULL;
-    }
-
-    int duped = dup(fd);
-    FILE* retval = fdopen(duped, "reb");
-    if (!retval) {
-        close(duped);
-        android_logcat_destroy(ctx);
-    }
-    return retval;
-}
-
-int android_logcat_pclose(android_logcat_context* ctx, FILE* output) {
-    if (*ctx) {
-        static const useconds_t wait_sample = 20000;
-        // Wait two seconds maximum
-        for (size_t retry = ((2 * 1000000) + wait_sample - 1) / wait_sample;
-             android_logcat_run_command_thread_running(*ctx) && retry; --retry) {
-            usleep(wait_sample);
-        }
-    }
-
-    if (output) fclose(output);
-    return android_logcat_destroy(ctx);
-}
-
-int android_logcat_system(const char* command) {
-    std::vector<std::string> args;
-    std::vector<std::string> envs;
-    if (!__android_logcat_parse(command, args, envs)) return -1;
-
-    std::vector<const char*> argv;
-    for (auto& str : args) {
-        argv.push_back(str.c_str());
-    }
-    argv.push_back(NULL);
-
-    std::vector<const char*> envp;
-    for (auto& str : envs) {
-        envp.push_back(str.c_str());
-    }
-    envp.push_back(NULL);
-
-    android_logcat_context ctx = create_android_logcat();
-    if (!ctx) return -1;
-    /* Command return value */
-    int retval = android_logcat_run_command(ctx, -1, -1, argv.size() - 1,
-                                            (char* const*)&argv[0],
-                                            (char* const*)&envp[0]);
-    /* destroy return value */
-    int ret = android_logcat_destroy(&ctx);
-    /* Paranoia merging any discrepancies between the two return values */
-    if (!ret) ret = retval;
-    return ret;
-}
diff --git a/logcat/logcatd_main.cpp b/logcat/logcatd_main.cpp
index 9109eb1..c131846 100644
--- a/logcat/logcatd_main.cpp
+++ b/logcat/logcatd_main.cpp
@@ -21,7 +21,7 @@
 #include <string>
 #include <vector>
 
-#include <log/logcat.h>
+#include "logcat.h"
 
 int main(int argc, char** argv, char** envp) {
     android_logcat_context ctx = create_android_logcat();
diff --git a/logcat/tests/Android.mk b/logcat/tests/Android.mk
index defd3c4..66f6724 100644
--- a/logcat/tests/Android.mk
+++ b/logcat/tests/Android.mk
@@ -32,7 +32,6 @@
 
 benchmark_src_files := \
     logcat_benchmark.cpp \
-    exec_benchmark.cpp \
 
 # Build benchmarks for the device. Run with:
 #   adb shell /data/nativetest/logcat-benchmarks/logcat-benchmarks
@@ -41,7 +40,7 @@
 LOCAL_MODULE_TAGS := $(test_tags)
 LOCAL_CFLAGS += $(test_c_flags)
 LOCAL_SRC_FILES := $(benchmark_src_files)
-LOCAL_SHARED_LIBRARIES := libbase liblogcat
+LOCAL_SHARED_LIBRARIES := libbase
 include $(BUILD_NATIVE_BENCHMARK)
 
 # -----------------------------------------------------------------------------
@@ -51,7 +50,6 @@
 test_src_files := \
     logcat_test.cpp \
     logcatd_test.cpp \
-    liblogcat_test.cpp \
 
 # Build tests for the device (with .so). Run with:
 #   adb shell /data/nativetest/logcat-unit-tests/logcat-unit-tests
@@ -59,6 +57,6 @@
 LOCAL_MODULE := $(test_module_prefix)unit-tests
 LOCAL_MODULE_TAGS := $(test_tags)
 LOCAL_CFLAGS += $(test_c_flags)
-LOCAL_SHARED_LIBRARIES := liblog libbase liblogcat
+LOCAL_SHARED_LIBRARIES := liblog libbase
 LOCAL_SRC_FILES := $(test_src_files)
 include $(BUILD_NATIVE_TEST)
diff --git a/logcat/tests/exec_benchmark.cpp b/logcat/tests/exec_benchmark.cpp
deleted file mode 100644
index c30a5f5..0000000
--- a/logcat/tests/exec_benchmark.cpp
+++ /dev/null
@@ -1,96 +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 <stdio.h>
-
-#include <android-base/file.h>
-#include <benchmark/benchmark.h>
-#include <log/logcat.h>
-
-// Dump the statistics and report results
-
-static void logcat_popen_libc(benchmark::State& state, const char* cmd) {
-    while (state.KeepRunning()) {
-        FILE* fp = popen(cmd, "r");
-        std::string ret;
-        android::base::ReadFdToString(fileno(fp), &ret);
-        pclose(fp);
-    }
-}
-
-static void BM_logcat_stat_popen_libc(benchmark::State& state) {
-    logcat_popen_libc(state, "logcat -b all -S");
-}
-BENCHMARK(BM_logcat_stat_popen_libc);
-
-static void logcat_popen_liblogcat(benchmark::State& state, const char* cmd) {
-    while (state.KeepRunning()) {
-        android_logcat_context ctx;
-        FILE* fp = android_logcat_popen(&ctx, cmd);
-        std::string ret;
-        android::base::ReadFdToString(fileno(fp), &ret);
-        android_logcat_pclose(&ctx, fp);
-    }
-}
-
-static void BM_logcat_stat_popen_liblogcat(benchmark::State& state) {
-    logcat_popen_liblogcat(state, "logcat -b all -S");
-}
-BENCHMARK(BM_logcat_stat_popen_liblogcat);
-
-static void logcat_system_libc(benchmark::State& state, const char* cmd) {
-    while (state.KeepRunning()) {
-        system(cmd);
-    }
-}
-
-static void BM_logcat_stat_system_libc(benchmark::State& state) {
-    logcat_system_libc(state, "logcat -b all -S >/dev/null 2>/dev/null");
-}
-BENCHMARK(BM_logcat_stat_system_libc);
-
-static void logcat_system_liblogcat(benchmark::State& state, const char* cmd) {
-    while (state.KeepRunning()) {
-        android_logcat_system(cmd);
-    }
-}
-
-static void BM_logcat_stat_system_liblogcat(benchmark::State& state) {
-    logcat_system_liblogcat(state, "logcat -b all -S >/dev/null 2>/dev/null");
-}
-BENCHMARK(BM_logcat_stat_system_liblogcat);
-
-// Dump the logs and report results
-
-static void BM_logcat_dump_popen_libc(benchmark::State& state) {
-    logcat_popen_libc(state, "logcat -b all -d");
-}
-BENCHMARK(BM_logcat_dump_popen_libc);
-
-static void BM_logcat_dump_popen_liblogcat(benchmark::State& state) {
-    logcat_popen_liblogcat(state, "logcat -b all -d");
-}
-BENCHMARK(BM_logcat_dump_popen_liblogcat);
-
-static void BM_logcat_dump_system_libc(benchmark::State& state) {
-    logcat_system_libc(state, "logcat -b all -d >/dev/null 2>/dev/null");
-}
-BENCHMARK(BM_logcat_dump_system_libc);
-
-static void BM_logcat_dump_system_liblogcat(benchmark::State& state) {
-    logcat_system_liblogcat(state, "logcat -b all -d >/dev/null 2>/dev/null");
-}
-BENCHMARK(BM_logcat_dump_system_liblogcat);
diff --git a/logcat/tests/liblogcat_test.cpp b/logcat/tests/liblogcat_test.cpp
deleted file mode 100644
index c8a00da..0000000
--- a/logcat/tests/liblogcat_test.cpp
+++ /dev/null
@@ -1,25 +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 <log/logcat.h>
-
-#define logcat_define(context) android_logcat_context context
-#define logcat_popen(context, command) android_logcat_popen(&(context), command)
-#define logcat_pclose(context, fp) android_logcat_pclose(&(context), fp)
-#define logcat_system(command) android_logcat_system(command)
-#define logcat liblogcat
-
-#include "logcat_test.cpp"
diff --git a/logcat/tests/logcat_test.cpp b/logcat/tests/logcat_test.cpp
index 786fb14..cc1632a 100644
--- a/logcat/tests/logcat_test.cpp
+++ b/logcat/tests/logcat_test.cpp
@@ -37,12 +37,6 @@
 #include <log/log.h>
 #include <log/log_event_list.h>
 
-#ifndef logcat_popen
-#define logcat_define(context)
-#define logcat_popen(context, command) popen((command), "r")
-#define logcat_pclose(context, fp) pclose(fp)
-#define logcat_system(command) system(command)
-#endif
 #ifndef logcat_executable
 #define USING_LOGCAT_EXECUTABLE_DEFAULT
 #define logcat_executable "logcat"
@@ -78,7 +72,6 @@
 
 TEST(logcat, buckets) {
     FILE* fp;
-    logcat_define(ctx);
 
 #undef LOG_TAG
 #define LOG_TAG "inject.buckets"
@@ -90,10 +83,9 @@
     __android_log_bswrite(0, logcat_executable ".inject.buckets");
     rest();
 
-    ASSERT_TRUE(NULL !=
-                (fp = logcat_popen(
-                     ctx, logcat_executable
-                     " -b radio -b events -b system -b main -d 2>/dev/null")));
+    ASSERT_TRUE(NULL != (fp = popen(logcat_executable
+                                    " -b radio -b events -b system -b main -d 2>/dev/null",
+                                    "r")));
 
     char buffer[BIG_BUFFER];
 
@@ -111,7 +103,7 @@
         }
     }
 
-    logcat_pclose(ctx, fp);
+    pclose(fp);
 
     EXPECT_EQ(ids, 15);
 
@@ -120,7 +112,6 @@
 
 TEST(logcat, event_tag_filter) {
     FILE* fp;
-    logcat_define(ctx);
 
 #undef LOG_TAG
 #define LOG_TAG "inject.filter"
@@ -135,7 +126,7 @@
         logcat_executable
         " -b radio -b system -b main --pid=%d -d -s inject.filter 2>/dev/null",
         getpid());
-    ASSERT_TRUE(NULL != (fp = logcat_popen(ctx, command.c_str())));
+    ASSERT_TRUE(NULL != (fp = popen(command.c_str(), "r")));
 
     char buffer[BIG_BUFFER];
 
@@ -145,7 +136,7 @@
         if (strncmp(begin, buffer, sizeof(begin) - 1)) ++count;
     }
 
-    logcat_pclose(ctx, fp);
+    pclose(fp);
 
     // logcat, liblogcat and logcatd test instances result in the progression
     // of 3, 6 and 9 for our counts as each round is performed.
@@ -191,7 +182,6 @@
 
     do {
         FILE* fp;
-        logcat_define(ctx);
 
         char needle[32];
         time_t now;
@@ -205,9 +195,8 @@
 #endif
         strftime(needle, sizeof(needle), "[ %Y-", ptm);
 
-        ASSERT_TRUE(NULL != (fp = logcat_popen(
-                                 ctx, logcat_executable
-                                 " -v long -v year -b all -t 3 2>/dev/null")));
+        ASSERT_TRUE(NULL !=
+                    (fp = popen(logcat_executable " -v long -v year -b all -t 3 2>/dev/null", "r")));
 
         char buffer[BIG_BUFFER];
 
@@ -218,7 +207,7 @@
                 ++count;
             }
         }
-        logcat_pclose(ctx, fp);
+        pclose(fp);
 
     } while ((count < 3) && --tries && inject(3 - count));
 
@@ -268,12 +257,10 @@
 
     do {
         FILE* fp;
-        logcat_define(ctx);
 
-        ASSERT_TRUE(NULL !=
-                    (fp = logcat_popen(ctx, logcat_executable
-                                       " -v long -v America/Los_Angeles "
-                                       "-b all -t 3 2>/dev/null")));
+        ASSERT_TRUE(NULL != (fp = popen(logcat_executable
+                                        " -v long -v America/Los_Angeles -b all -t 3 2>/dev/null",
+                                        "r")));
 
         char buffer[BIG_BUFFER];
 
@@ -287,7 +274,7 @@
             }
         }
 
-        logcat_pclose(ctx, fp);
+        pclose(fp);
 
     } while ((count < 3) && --tries && inject(3 - count));
 
@@ -296,11 +283,11 @@
 
 TEST(logcat, ntz) {
     FILE* fp;
-    logcat_define(ctx);
 
-    ASSERT_TRUE(NULL != (fp = logcat_popen(ctx, logcat_executable
-                                           " -v long -v America/Los_Angeles -v "
-                                           "zone -b all -t 3 2>/dev/null")));
+    ASSERT_TRUE(NULL !=
+                (fp = popen(logcat_executable
+                            " -v long -v America/Los_Angeles -v zone -b all -t 3 2>/dev/null",
+                            "r")));
 
     char buffer[BIG_BUFFER];
 
@@ -312,7 +299,7 @@
         }
     }
 
-    logcat_pclose(ctx, fp);
+    pclose(fp);
 
     ASSERT_EQ(0, count);
 }
@@ -330,8 +317,7 @@
                  "ANDROID_PRINTF_LOG=long logcat -b all -t %d 2>/dev/null", num);
 
         FILE* fp;
-        logcat_define(ctx);
-        ASSERT_TRUE(NULL != (fp = logcat_popen(ctx, buffer)));
+        ASSERT_TRUE(NULL != (fp = popen(buffer, "r")));
 
         count = 0;
 
@@ -339,7 +325,7 @@
             ++count;
         }
 
-        logcat_pclose(ctx, fp);
+        pclose(fp);
 
     } while ((count < num) && --tries && inject(num - count));
 
@@ -377,8 +363,7 @@
 
     do {
         snprintf(buffer, sizeof(buffer), "%s -t 10 2>&1", cmd);
-        logcat_define(ctx);
-        ASSERT_TRUE(NULL != (fp = logcat_popen(ctx, buffer)));
+        ASSERT_TRUE(NULL != (fp = popen(buffer, "r")));
         count = 0;
 
         while ((input = fgetLongTime(buffer, sizeof(buffer), fp))) {
@@ -391,7 +376,7 @@
             free(last_timestamp);
             last_timestamp = strdup(input);
         }
-        logcat_pclose(ctx, fp);
+        pclose(fp);
 
     } while ((count < 10) && --tries && inject(10 - count));
 
@@ -401,8 +386,7 @@
     EXPECT_TRUE(second_timestamp != NULL);
 
     snprintf(buffer, sizeof(buffer), "%s -t '%s' 2>&1", cmd, first_timestamp);
-    logcat_define(ctx);
-    ASSERT_TRUE(NULL != (fp = logcat_popen(ctx, buffer)));
+    ASSERT_TRUE(NULL != (fp = popen(buffer, "r")));
 
     int second_count = 0;
     int last_timestamp_count = -1;
@@ -442,7 +426,7 @@
             last_timestamp_count = second_count;
         }
     }
-    logcat_pclose(ctx, fp);
+    pclose(fp);
 
     EXPECT_TRUE(found);
     if (!found) {
@@ -483,10 +467,8 @@
     ASSERT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
 
     FILE* fp;
-    logcat_define(ctx);
     ASSERT_TRUE(NULL !=
-                (fp = logcat_popen(ctx, logcat_executable
-                                   " -v brief -b events -t 100 2>/dev/null")));
+                (fp = popen(logcat_executable " -v brief -b events -t 100 2>/dev/null", "r")));
 
     char buffer[BIG_BUFFER];
 
@@ -507,7 +489,7 @@
         }
     }
 
-    logcat_pclose(ctx, fp);
+    pclose(fp);
 
     ASSERT_EQ(1, count);
 }
@@ -521,12 +503,9 @@
 
     FILE* fp[256];  // does this count as a multitude!
     memset(fp, 0, sizeof(fp));
-    logcat_define(ctx[sizeof(fp) / sizeof(fp[0])]);
     size_t num = 0;
     do {
-        EXPECT_TRUE(NULL !=
-                    (fp[num] = logcat_popen(ctx[num], logcat_executable
-                                            " -v brief -b events -t 100")));
+        EXPECT_TRUE(NULL != (fp[num] = popen(logcat_executable " -v brief -b events -t 100", "r")));
         if (!fp[num]) {
             fprintf(stderr,
                     "WARNING: limiting to %zu simultaneous logcat operations\n",
@@ -556,7 +535,7 @@
             }
         }
 
-        logcat_pclose(ctx[idx], fp[idx]);
+        pclose(fp[idx]);
     }
 
     ASSERT_EQ(num, count);
@@ -564,10 +543,9 @@
 
 static int get_groups(const char* cmd) {
     FILE* fp;
-    logcat_define(ctx);
 
     // NB: crash log only available in user space
-    EXPECT_TRUE(NULL != (fp = logcat_popen(ctx, cmd)));
+    EXPECT_TRUE(NULL != (fp = popen(cmd, "r")));
 
     if (fp == NULL) {
         return 0;
@@ -631,7 +609,7 @@
         }
     }
 
-    logcat_pclose(ctx, fp);
+    pclose(fp);
 
     return count;
 }
@@ -815,7 +793,7 @@
     snprintf(command, sizeof(command), comm, buf);
 
     int ret;
-    EXPECT_FALSE(IsFalse(ret = logcat_system(command), command));
+    EXPECT_FALSE(IsFalse(ret = system(command), command));
     if (!ret) {
         snprintf(command, sizeof(command), "ls -s %s 2>/dev/null", buf);
 
@@ -861,7 +839,7 @@
     snprintf(command, sizeof(command), logcat_cmd, tmp_out_dir);
 
     int ret;
-    EXPECT_FALSE(IsFalse(ret = logcat_system(command), command));
+    EXPECT_FALSE(IsFalse(ret = system(command), command));
     if (!ret) {
         snprintf(command, sizeof(command), "ls %s 2>/dev/null", tmp_out_dir);
 
@@ -920,7 +898,7 @@
     snprintf(command, sizeof(command), logcat_cmd, tmp_out_dir, log_filename);
 
     int ret;
-    EXPECT_FALSE(IsFalse(ret = logcat_system(command), command));
+    EXPECT_FALSE(IsFalse(ret = system(command), command));
     if (ret) {
         snprintf(command, sizeof(command), cleanup_cmd, tmp_out_dir);
         EXPECT_FALSE(IsFalse(system(command), command));
@@ -969,7 +947,7 @@
     // re-run the command, it should only add a few lines more content if it
     // continues where it left off.
     snprintf(command, sizeof(command), logcat_cmd, tmp_out_dir, log_filename);
-    EXPECT_FALSE(IsFalse(ret = logcat_system(command), command));
+    EXPECT_FALSE(IsFalse(ret = system(command), command));
     if (ret) {
         snprintf(command, sizeof(command), cleanup_cmd, tmp_out_dir);
         EXPECT_FALSE(IsFalse(system(command), command));
@@ -1052,7 +1030,7 @@
                  tmp_out_dir, log_filename, num_val);
 
         int ret;
-        EXPECT_FALSE(IsFalse(ret = logcat_system(command), command));
+        EXPECT_FALSE(IsFalse(ret = system(command), command));
         if (ret) {
             snprintf(command, sizeof(command), cleanup_cmd, tmp_out_dir);
             EXPECT_FALSE(IsFalse(system(command), command));
@@ -1082,7 +1060,7 @@
         strcat(command, clear_cmd);
 
         int ret;
-        EXPECT_FALSE(IsFalse(ret = logcat_system(command), command));
+        EXPECT_FALSE(IsFalse(ret = system(command), command));
         if (ret) {
             snprintf(command, sizeof(command), cleanup_cmd, tmp_out_dir);
             EXPECT_FALSE(system(command));
@@ -1120,7 +1098,7 @@
 
     snprintf(command, sizeof(command), logcat_cmd, tmp_out_dir, log_filename);
 
-    int ret = logcat_system(command);
+    int ret = system(command);
     if (ret) {
         fprintf(stderr, "system(\"%s\")=%d", command, ret);
         return -1;
@@ -1194,7 +1172,7 @@
         " -b all -d"
         " -f /das/nein/gerfingerpoken/logcat/log.txt"
         " -n 256 -r 1024";
-    EXPECT_FALSE(IsFalse(0 == logcat_system(command), command));
+    EXPECT_FALSE(IsFalse(0 == system(command), command));
 }
 
 #ifndef logcat
@@ -1329,10 +1307,7 @@
 #endif
 
 static bool get_white_black(char** list) {
-    FILE* fp;
-    logcat_define(ctx);
-
-    fp = logcat_popen(ctx, logcat_executable " -p 2>/dev/null");
+    FILE* fp = popen(logcat_executable " -p 2>/dev/null", "r");
     if (fp == NULL) {
         fprintf(stderr, "ERROR: logcat -p 2>/dev/null\n");
         return false;
@@ -1360,19 +1335,15 @@
             asprintf(list, "%s", buf);
         }
     }
-    logcat_pclose(ctx, fp);
+    pclose(fp);
     return *list != NULL;
 }
 
 static bool set_white_black(const char* list) {
-    FILE* fp;
-    logcat_define(ctx);
-
     char buffer[BIG_BUFFER];
-
     snprintf(buffer, sizeof(buffer), logcat_executable " -P '%s' 2>&1",
              list ? list : "");
-    fp = logcat_popen(ctx, buffer);
+    FILE* fp = popen(buffer, "r");
     if (fp == NULL) {
         fprintf(stderr, "ERROR: %s\n", buffer);
         return false;
@@ -1391,10 +1362,10 @@
             continue;
         }
         fprintf(stderr, "%s\n", buf);
-        logcat_pclose(ctx, fp);
+        pclose(fp);
         return false;
     }
-    return logcat_pclose(ctx, fp) == 0;
+    return pclose(fp) == 0;
 }
 
 TEST(logcat, white_black_adjust) {
@@ -1429,7 +1400,6 @@
 
 TEST(logcat, regex) {
     FILE* fp;
-    logcat_define(ctx);
     int count = 0;
 
     char buffer[BIG_BUFFER];
@@ -1450,7 +1420,7 @@
     // Let the logs settle
     rest();
 
-    ASSERT_TRUE(NULL != (fp = logcat_popen(ctx, buffer)));
+    ASSERT_TRUE(NULL != (fp = popen(buffer, "r")));
 
     while (fgets(buffer, sizeof(buffer), fp)) {
         if (!strncmp(begin, buffer, sizeof(begin) - 1)) {
@@ -1462,14 +1432,13 @@
         count++;
     }
 
-    logcat_pclose(ctx, fp);
+    pclose(fp);
 
     ASSERT_EQ(2, count);
 }
 
 TEST(logcat, maxcount) {
     FILE* fp;
-    logcat_define(ctx);
     int count = 0;
 
     char buffer[BIG_BUFFER];
@@ -1488,7 +1457,7 @@
 
     rest();
 
-    ASSERT_TRUE(NULL != (fp = logcat_popen(ctx, buffer)));
+    ASSERT_TRUE(NULL != (fp = popen(buffer, "r")));
 
     while (fgets(buffer, sizeof(buffer), fp)) {
         if (!strncmp(begin, buffer, sizeof(begin) - 1)) {
@@ -1498,7 +1467,7 @@
         count++;
     }
 
-    logcat_pclose(ctx, fp);
+    pclose(fp);
 
     ASSERT_EQ(3, count);
 }
@@ -1510,13 +1479,7 @@
     ;
 
 static bool End_to_End(const char* tag, const char* fmt, ...) {
-    logcat_define(ctx);
-    FILE* fp = logcat_popen(ctx, logcat_executable
-                            " -v brief"
-                            " -b events"
-                            " -v descriptive"
-                            " -t 100"
-                            " 2>/dev/null");
+    FILE* fp = popen(logcat_executable " -v brief -b events -v descriptive -t 100 2>/dev/null", "r");
     if (!fp) {
         fprintf(stderr, "End_to_End: popen failed");
         return false;
@@ -1551,7 +1514,7 @@
         }
     }
 
-    logcat_pclose(ctx, fp);
+    pclose(fp);
 
     if ((count == 0) && (lastMatch.length() > 0)) {
         // Help us pinpoint where things went wrong ...
@@ -1741,13 +1704,12 @@
 }
 
 static bool reportedSecurity(const char* command) {
-    logcat_define(ctx);
-    FILE* fp = logcat_popen(ctx, command);
+    FILE* fp = popen(command, "r");
     if (!fp) return true;
 
     std::string ret;
     bool val = android::base::ReadFdToString(fileno(fp), &ret);
-    logcat_pclose(ctx, fp);
+    pclose(fp);
 
     if (!val) return true;
     return std::string::npos != ret.find("'security'");
@@ -1762,13 +1724,12 @@
 }
 
 static size_t commandOutputSize(const char* command) {
-    logcat_define(ctx);
-    FILE* fp = logcat_popen(ctx, command);
+    FILE* fp = popen(command, "r");
     if (!fp) return 0;
 
     std::string ret;
     if (!android::base::ReadFdToString(fileno(fp), &ret)) return 0;
-    if (logcat_pclose(ctx, fp) != 0) return 0;
+    if (pclose(fp) != 0) return 0;
 
     return ret.size();
 }
diff --git a/logd/LogAudit.cpp b/logd/LogAudit.cpp
index 269db2f..27cd9a8 100755
--- a/logd/LogAudit.cpp
+++ b/logd/LogAudit.cpp
@@ -112,7 +112,7 @@
 std::map<std::string, std::string> LogAudit::populateDenialMap() {
     std::ifstream bug_file("/system/etc/selinux/selinux_denial_metadata");
     std::string line;
-    // allocate a map for the static map pointer in logParse to keep track of,
+    // allocate a map for the static map pointer in auditParse to keep track of,
     // this function only runs once
     std::map<std::string, std::string> denial_to_bug;
     if (bug_file.good()) {
@@ -140,7 +140,8 @@
     return "";
 }
 
-void LogAudit::logParse(const std::string& string, std::string* bug_num) {
+void LogAudit::auditParse(const std::string& string, uid_t uid,
+                          std::string* bug_num) {
     if (!__android_log_is_debuggable()) {
         bug_num->assign("");
         return;
@@ -162,6 +163,11 @@
     } else {
         bug_num->assign("");
     }
+
+    if (uid >= AID_APP_START && uid <= AID_APP_END) {
+        bug_num->append(" app=");
+        bug_num->append(android::uidToName(uid));
+    }
 }
 
 int LogAudit::logPrint(const char* fmt, ...) {
@@ -190,8 +196,27 @@
     while ((cp = strstr(str, "  "))) {
         memmove(cp, cp + 1, strlen(cp + 1) + 1);
     }
+    pid_t pid = getpid();
+    pid_t tid = gettid();
+    uid_t uid = AID_LOGD;
+    static const char pid_str[] = " pid=";
+    char* pidptr = strstr(str, pid_str);
+    if (pidptr && isdigit(pidptr[sizeof(pid_str) - 1])) {
+        cp = pidptr + sizeof(pid_str) - 1;
+        pid = 0;
+        while (isdigit(*cp)) {
+            pid = (pid * 10) + (*cp - '0');
+            ++cp;
+        }
+        tid = pid;
+        logbuf->wrlock();
+        uid = logbuf->pidToUid(pid);
+        logbuf->unlock();
+        memmove(pidptr, cp, strlen(cp) + 1);
+    }
+
     bool info = strstr(str, " permissive=1") || strstr(str, " policy loaded ");
-    static std::string bug_metadata;
+    static std::string denial_metadata;
     if ((fdDmesg >= 0) && initialized) {
         struct iovec iov[4];
         static const char log_info[] = { KMSG_PRIORITY(LOG_INFO) };
@@ -228,8 +253,8 @@
                     last_info ? sizeof(log_info) : sizeof(log_warning);
                 iov[1].iov_base = last_str;
                 iov[1].iov_len = strlen(last_str);
-                iov[2].iov_base = const_cast<char*>(bug_metadata.c_str());
-                iov[2].iov_len = bug_metadata.length();
+                iov[2].iov_base = const_cast<char*>(denial_metadata.c_str());
+                iov[2].iov_len = denial_metadata.length();
                 if (count > 1) {
                     iov[3].iov_base = const_cast<char*>(resume);
                     iov[3].iov_len = strlen(resume);
@@ -249,14 +274,14 @@
             last_info = info;
         }
         if (count == 0) {
-            logParse(str, &bug_metadata);
+            auditParse(str, uid, &denial_metadata);
             iov[0].iov_base = info ? const_cast<char*>(log_info)
                                    : const_cast<char*>(log_warning);
             iov[0].iov_len = info ? sizeof(log_info) : sizeof(log_warning);
             iov[1].iov_base = str;
             iov[1].iov_len = strlen(str);
-            iov[2].iov_base = const_cast<char*>(bug_metadata.c_str());
-            iov[2].iov_len = bug_metadata.length();
+            iov[2].iov_base = const_cast<char*>(denial_metadata.c_str());
+            iov[2].iov_len = denial_metadata.length();
             iov[3].iov_base = const_cast<char*>(newline);
             iov[3].iov_len = strlen(newline);
 
@@ -269,9 +294,6 @@
         return 0;
     }
 
-    pid_t pid = getpid();
-    pid_t tid = gettid();
-    uid_t uid = AID_LOGD;
     log_time now;
 
     static const char audit_str[] = " audit(";
@@ -296,29 +318,13 @@
         now = log_time(CLOCK_REALTIME);
     }
 
-    static const char pid_str[] = " pid=";
-    char* pidptr = strstr(str, pid_str);
-    if (pidptr && isdigit(pidptr[sizeof(pid_str) - 1])) {
-        cp = pidptr + sizeof(pid_str) - 1;
-        pid = 0;
-        while (isdigit(*cp)) {
-            pid = (pid * 10) + (*cp - '0');
-            ++cp;
-        }
-        tid = pid;
-        logbuf->wrlock();
-        uid = logbuf->pidToUid(pid);
-        logbuf->unlock();
-        memmove(pidptr, cp, strlen(cp) + 1);
-    }
-
     // log to events
 
     size_t str_len = strnlen(str, LOGGER_ENTRY_MAX_PAYLOAD);
     if (((fdDmesg < 0) || !initialized) && !hasMetadata(str, str_len))
-        logParse(str, &bug_metadata);
-    str_len = (str_len + bug_metadata.length() <= LOGGER_ENTRY_MAX_PAYLOAD)
-                  ? str_len + bug_metadata.length()
+        auditParse(str, uid, &denial_metadata);
+    str_len = (str_len + denial_metadata.length() <= LOGGER_ENTRY_MAX_PAYLOAD)
+                  ? str_len + denial_metadata.length()
                   : LOGGER_ENTRY_MAX_PAYLOAD;
     size_t message_len = str_len + sizeof(android_log_event_string_t);
 
@@ -332,9 +338,9 @@
         event->header.tag = htole32(AUDITD_LOG_TAG);
         event->type = EVENT_TYPE_STRING;
         event->length = htole32(str_len);
-        memcpy(event->data, str, str_len - bug_metadata.length());
-        memcpy(event->data + str_len - bug_metadata.length(),
-               bug_metadata.c_str(), bug_metadata.length());
+        memcpy(event->data, str, str_len - denial_metadata.length());
+        memcpy(event->data + str_len - denial_metadata.length(),
+               denial_metadata.c_str(), denial_metadata.length());
 
         rc = logbuf->log(
             LOG_ID_EVENTS, now, uid, pid, tid, reinterpret_cast<char*>(event),
@@ -380,7 +386,8 @@
         prefix_len = LOGGER_ENTRY_MAX_PAYLOAD;
     }
     size_t suffix_len = strnlen(ecomm, LOGGER_ENTRY_MAX_PAYLOAD - prefix_len);
-    message_len = str_len + prefix_len + suffix_len + bug_metadata.length() + 2;
+    message_len =
+        str_len + prefix_len + suffix_len + denial_metadata.length() + 2;
 
     if (main) {  // begin scope for main buffer
         char newstr[message_len];
@@ -390,7 +397,7 @@
         strncpy(newstr + 1 + str_len, str, prefix_len);
         strncpy(newstr + 1 + str_len + prefix_len, ecomm, suffix_len);
         strncpy(newstr + 1 + str_len + prefix_len + suffix_len,
-                bug_metadata.c_str(), bug_metadata.length());
+                denial_metadata.c_str(), denial_metadata.length());
 
         rc = logbuf->log(LOG_ID_MAIN, now, uid, pid, tid, newstr,
                          (message_len <= USHRT_MAX) ? (unsigned short)message_len
diff --git a/logd/LogAudit.h b/logd/LogAudit.h
index 5904966..c3d7a3e 100644
--- a/logd/LogAudit.h
+++ b/logd/LogAudit.h
@@ -48,7 +48,7 @@
     std::map<std::string, std::string> populateDenialMap();
     std::string denialParse(const std::string& denial, char terminator,
                             const std::string& search_term);
-    void logParse(const std::string& string, std::string* bug_num);
+    void auditParse(const std::string& string, uid_t uid, std::string* bug_num);
     int logPrint(const char* fmt, ...)
         __attribute__((__format__(__printf__, 2, 3)));
 };
diff --git a/logd/logd.rc b/logd/logd.rc
index bd303b7..c740ecf 100644
--- a/logd/logd.rc
+++ b/logd/logd.rc
@@ -6,6 +6,7 @@
     file /dev/kmsg w
     user logd
     group logd system package_info readproc
+    capabilities SYSLOG AUDIT_CONTROL SETGID
     writepid /dev/cpuset/system-background/tasks
 
 service logd-reinit /system/bin/logd --reinit
diff --git a/logd/main.cpp b/logd/main.cpp
index 4af0d21..b697d44 100644
--- a/logd/main.cpp
+++ b/logd/main.cpp
@@ -33,7 +33,6 @@
 #include <syslog.h>
 #include <unistd.h>
 
-#include <cstdbool>
 #include <memory>
 
 #include <android-base/macros.h>
@@ -88,37 +87,27 @@
 //
 
 static int drop_privs(bool klogd, bool auditd) {
-    // Tricky, if ro.build.type is "eng" then this is true because of the
-    // side effect that ro.debuggable == 1 as well, else it is false.
-    bool eng =
-        __android_logger_property_get_bool("ro.build.type", BOOL_DEFAULT_FALSE);
-
-    struct sched_param param;
-    memset(&param, 0, sizeof(param));
+    sched_param param = {};
 
     if (set_sched_policy(0, SP_BACKGROUND) < 0) {
         android::prdebug("failed to set background scheduling policy");
-        if (!eng) return -1;
+        return -1;
     }
 
     if (sched_setscheduler((pid_t)0, SCHED_BATCH, &param) < 0) {
         android::prdebug("failed to set batch scheduler");
-        if (!eng) return -1;
+        return -1;
     }
 
     if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) {
         android::prdebug("failed to set background cgroup");
-        if (!eng) return -1;
-    }
-
-    if (!eng && (prctl(PR_SET_DUMPABLE, 0) < 0)) {
-        android::prdebug("failed to clear PR_SET_DUMPABLE");
         return -1;
     }
 
-    if (prctl(PR_SET_KEEPCAPS, 1) < 0) {
-        android::prdebug("failed to set PR_SET_KEEPCAPS");
-        if (!eng) return -1;
+    if (__android_logger_property_get_bool("ro.debuggable", BOOL_DEFAULT_FALSE) &&
+        prctl(PR_SET_DUMPABLE, 0) == -1) {
+        android::prdebug("failed to clear PR_SET_DUMPABLE");
+        return -1;
     }
 
     std::unique_ptr<struct _cap_struct, int (*)(void*)> caps(cap_init(),
@@ -139,24 +128,24 @@
         android::prdebug(
             "failed to set CAP_SETGID, CAP_SYSLOG or CAP_AUDIT_CONTROL (%d)",
             errno);
-        if (!eng) return -1;
+        return -1;
     }
 
     gid_t groups[] = { AID_READPROC };
 
     if (setgroups(arraysize(groups), groups) == -1) {
         android::prdebug("failed to set AID_READPROC groups");
-        if (!eng) return -1;
+        return -1;
     }
 
     if (setgid(AID_LOGD) != 0) {
         android::prdebug("failed to set AID_LOGD gid");
-        if (!eng) return -1;
+        return -1;
     }
 
     if (setuid(AID_LOGD) != 0) {
         android::prdebug("failed to set AID_LOGD uid");
-        if (!eng) return -1;
+        return -1;
     }
 
     if (cap_set_flag(caps.get(), CAP_PERMITTED, 1, cap_value, CAP_CLEAR) < 0) {
@@ -167,7 +156,7 @@
     }
     if (cap_set_proc(caps.get()) < 0) {
         android::prdebug("failed to clear CAP_SETGID (%d)", errno);
-        if (!eng) return -1;
+        return -1;
     }
 
     return 0;
@@ -474,7 +463,7 @@
     bool auditd =
         __android_logger_property_get_bool("ro.logd.auditd", BOOL_DEFAULT_TRUE);
     if (drop_privs(klogd, auditd) != 0) {
-        return -1;
+        return EXIT_FAILURE;
     }
 
     // Serves the purpose of managing the last logs times read on a
@@ -502,7 +491,7 @@
 
     LogReader* reader = new LogReader(logBuf);
     if (reader->startListener()) {
-        exit(1);
+        return EXIT_FAILURE;
     }
 
     // LogListener listens on /dev/socket/logdw for client
@@ -512,7 +501,7 @@
     LogListener* swl = new LogListener(logBuf, reader);
     // Backlog and /proc/sys/net/unix/max_dgram_qlen set to large value
     if (swl->startListener(600)) {
-        exit(1);
+        return EXIT_FAILURE;
     }
 
     // Command listener listens on /dev/socket/logd for incoming logd
@@ -520,7 +509,7 @@
 
     CommandListener* cl = new CommandListener(logBuf, reader, swl);
     if (cl->startListener()) {
-        exit(1);
+        return EXIT_FAILURE;
     }
 
     // LogAudit listens on NETLINK_AUDIT socket for selinux
@@ -555,5 +544,5 @@
 
     TEMP_FAILURE_RETRY(pause());
 
-    exit(0);
+    return EXIT_SUCCESS;
 }
diff --git a/logwrapper/Android.bp b/logwrapper/Android.bp
index 54506dc..c378646 100644
--- a/logwrapper/Android.bp
+++ b/logwrapper/Android.bp
@@ -12,6 +12,7 @@
 cc_library {
     name: "liblogwrap",
     defaults: ["logwrapper_defaults"],
+    recovery_available: true,
     srcs: ["logwrap.c"],
     shared_libs: [
         "libcutils",
@@ -41,14 +42,11 @@
     defaults: ["logwrapper_common"],
 }
 
-// Build vendor logwrapper.
-// TODO: Add vendor_available to "logwrapper" module and remove "logwrapper_vendor" module
-//       when vendor_available is fully supported.
 cc_binary {
     name: "logwrapper_vendor",
+    defaults: ["logwrapper_common"],
     stem: "logwrapper",
     vendor: true,
-    defaults: ["logwrapper_common"],
 }
 
 // ========================================================
diff --git a/mkbootimg/OWNERS b/mkbootimg/OWNERS
new file mode 100644
index 0000000..3a00860
--- /dev/null
+++ b/mkbootimg/OWNERS
@@ -0,0 +1,2 @@
+hridya@google.com
+tbao@google.com
diff --git a/mkbootimg/include/bootimg/bootimg.h b/mkbootimg/include/bootimg/bootimg.h
index 0188d0e..bce308b 100644
--- a/mkbootimg/include/bootimg/bootimg.h
+++ b/mkbootimg/include/bootimg/bootimg.h
@@ -1,37 +1,33 @@
-/* tools/mkbootimg/bootimg.h
-**
-** Copyright 2007, 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.
-*/
+/*
+ * Copyright (C) 2007 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>
 
-#ifndef _BOOT_IMAGE_H_
-#define _BOOT_IMAGE_H_
-
 #define BOOT_MAGIC "ANDROID!"
 #define BOOT_MAGIC_SIZE 8
 #define BOOT_NAME_SIZE 16
 #define BOOT_ARGS_SIZE 512
 #define BOOT_EXTRA_ARGS_SIZE 1024
 
-#define BOOT_HEADER_VERSION_ZERO 0
-/*
- *  Bootloader expects the structure of boot_img_hdr with header version
- *  BOOT_HEADER_VERSION_ZERO to be as follows:
- */
+// The bootloader expects the structure of boot_img_hdr with header
+// version 0 to be as follows:
 struct boot_img_hdr_v0 {
+    // Must be BOOT_MAGIC.
     uint8_t magic[BOOT_MAGIC_SIZE];
 
     uint32_t kernel_size; /* size in bytes */
@@ -45,26 +41,36 @@
 
     uint32_t tags_addr; /* physical addr for kernel tags */
     uint32_t page_size; /* flash page size we assume */
-    /*
-     * version for the boot image header.
-     */
+
+    // Version of the boot image header.
     uint32_t header_version;
 
-    /* operating system version and security patch level; for
-     * version "A.B.C" and patch level "Y-M-D":
-     * ver = A << 14 | B << 7 | C         (7 bits for each of A, B, C)
-     * lvl = ((Y - 2000) & 127) << 4 | M  (7 bits for Y, 4 bits for M)
-     * os_version = ver << 11 | lvl */
+    // Operating system version and security patch level.
+    // For version "A.B.C" and patch level "Y-M-D":
+    //   (7 bits for each of A, B, C; 7 bits for (Y-2000), 4 bits for M)
+    //   os_version = A[31:25] B[24:18] C[17:11] (Y-2000)[10:4] M[3:0]
     uint32_t os_version;
 
+#if __cplusplus
+    void SetOsVersion(unsigned major, unsigned minor, unsigned patch) {
+        os_version &= ((1 << 11) - 1);
+        os_version |= (((major & 0x7f) << 25) | ((minor & 0x7f) << 18) | ((patch & 0x7f) << 11));
+    }
+
+    void SetOsPatchLevel(unsigned year, unsigned month) {
+        os_version &= ~((1 << 11) - 1);
+        os_version |= (((year - 2000) & 0x7f) << 4) | ((month & 0xf) << 0);
+    }
+#endif
+
     uint8_t name[BOOT_NAME_SIZE]; /* asciiz product name */
 
     uint8_t cmdline[BOOT_ARGS_SIZE];
 
     uint32_t id[8]; /* timestamp / checksum / sha1 / etc */
 
-    /* Supplemental command line data; kept here to maintain
-     * binary compatibility with older versions of mkbootimg */
+    // Supplemental command line data; kept here to maintain
+    // binary compatibility with older versions of mkbootimg.
     uint8_t extra_cmdline[BOOT_EXTRA_ARGS_SIZE];
 } __attribute__((packed));
 
@@ -74,7 +80,7 @@
  */
 typedef struct boot_img_hdr_v0 boot_img_hdr;
 
-/* When a boot header is of version BOOT_HEADER_VERSION_ZERO, the structure of boot image is as
+/* When a boot header is of version 0, the structure of boot image is as
  * follows:
  *
  * +-----------------+
@@ -103,15 +109,13 @@
  *    else: jump to kernel_addr
  */
 
-#define BOOT_HEADER_VERSION_ONE 1
-
 struct boot_img_hdr_v1 : public boot_img_hdr_v0 {
     uint32_t recovery_dtbo_size;   /* size in bytes for recovery DTBO image */
     uint64_t recovery_dtbo_offset; /* offset to recovery dtbo in boot image */
     uint32_t header_size;
 } __attribute__((packed));
 
-/* When the boot image header has a version of BOOT_HEADER_VERSION_ONE, the structure of the boot
+/* When the boot image header has a version of 1, the structure of the boot
  * image is as follows:
  *
  * +-----------------+
@@ -145,23 +149,3 @@
  * 8. if second_size != 0: jump to second_addr
  *    else: jump to kernel_addr
  */
-
-#if 0
-typedef struct ptentry ptentry;
-
-struct ptentry {
-    char name[16];      /* asciiz partition name    */
-    unsigned start;     /* starting block number    */
-    unsigned length;    /* length in blocks         */
-    unsigned flags;     /* set to zero              */
-};
-
-/* MSM Partition Table ATAG
-**
-** length: 2 + 7 * n
-** atag:   0x4d534d70
-**         <ptentry> x n
-*/
-#endif
-
-#endif
diff --git a/property_service/libpropertyinfoparser/Android.bp b/property_service/libpropertyinfoparser/Android.bp
index ea9b968..70f6faa 100644
--- a/property_service/libpropertyinfoparser/Android.bp
+++ b/property_service/libpropertyinfoparser/Android.bp
@@ -2,6 +2,7 @@
     name: "libpropertyinfoparser",
     host_supported: true,
     vendor_available: true,
+    recovery_available: true,
     srcs: ["property_info_parser.cpp"],
 
     cpp_std: "experimental",
diff --git a/property_service/libpropertyinfoserializer/Android.bp b/property_service/libpropertyinfoserializer/Android.bp
index 72ae19a..3c4bdc3 100644
--- a/property_service/libpropertyinfoserializer/Android.bp
+++ b/property_service/libpropertyinfoserializer/Android.bp
@@ -35,4 +35,5 @@
         "property_info_serializer_test.cpp",
     ],
     static_libs: ["libpropertyinfoserializer"],
+    test_suites: ["device-tests"],
 }
diff --git a/qemu_pipe/Android.bp b/qemu_pipe/Android.bp
index 93c347b..c6bda4a 100644
--- a/qemu_pipe/Android.bp
+++ b/qemu_pipe/Android.bp
@@ -3,6 +3,7 @@
 cc_library_static {
     name: "libqemu_pipe",
     vendor_available: true,
+    recovery_available: true,
     sanitize: {
         misc_undefined: ["integer"],
     },
diff --git a/rootdir/Android.mk b/rootdir/Android.mk
index 80e068a..3d0325d 100644
--- a/rootdir/Android.mk
+++ b/rootdir/Android.mk
@@ -309,6 +309,16 @@
 _enforce_vndk_lite_at_runtime :=
 
 #######################################
+# ld.config.txt for recovery
+include $(CLEAR_VARS)
+LOCAL_MODULE := ld.config.recovery.txt
+LOCAL_MODULE_CLASS := ETC
+LOCAL_SRC_FILES := etc/ld.config.recovery.txt
+LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/etc
+LOCAL_MODULE_STEM := ld.config.txt
+include $(BUILD_PREBUILT)
+
+#######################################
 # llndk.libraries.txt
 include $(CLEAR_VARS)
 LOCAL_MODULE := llndk.libraries.txt
diff --git a/rootdir/etc/ld.config.recovery.txt b/rootdir/etc/ld.config.recovery.txt
new file mode 100644
index 0000000..5d6c01a
--- /dev/null
+++ b/rootdir/etc/ld.config.recovery.txt
@@ -0,0 +1,9 @@
+# Copyright (C) 2018 The Android Open Source Project
+#
+# Bionic loader config file for recovery mode
+#
+
+dir.recovery = /system/bin
+
+[recovery]
+namespace.default.search.paths = /system/${LIB}
diff --git a/rootdir/etc/ld.config.txt b/rootdir/etc/ld.config.txt
index a0b1996..eebad2b 100644
--- a/rootdir/etc/ld.config.txt
+++ b/rootdir/etc/ld.config.txt
@@ -52,6 +52,7 @@
 namespace.default.permitted.paths += /system/${LIB}/extractors
 namespace.default.permitted.paths += /system/${LIB}/hw
 namespace.default.permitted.paths += /product/${LIB}
+namespace.default.permitted.paths += /system/product/${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
@@ -66,6 +67,9 @@
 namespace.default.permitted.paths += /product/framework
 namespace.default.permitted.paths += /product/app
 namespace.default.permitted.paths += /product/priv-app
+namespace.default.permitted.paths += /system/product/framework
+namespace.default.permitted.paths += /system/product/app
+namespace.default.permitted.paths += /system/product/priv-app
 namespace.default.permitted.paths += /data
 namespace.default.permitted.paths += /mnt/expand
 
@@ -92,6 +96,10 @@
 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 += /system/product/${LIB}
+namespace.default.asan.permitted.paths += /system/product/framework
+namespace.default.asan.permitted.paths += /system/product/app
+namespace.default.asan.permitted.paths += /system/product/priv-app
 namespace.default.asan.permitted.paths += /mnt/expand
 
 ###############################################################################
diff --git a/rootdir/etc/public.libraries.iot.txt b/rootdir/etc/public.libraries.iot.txt
new file mode 100644
index 0000000..ff0813d
--- /dev/null
+++ b/rootdir/etc/public.libraries.iot.txt
@@ -0,0 +1,27 @@
+# See https://android.googlesource.com/platform/ndk/+/master/docs/PlatformApis.md
+libandroid.so
+libandroidthings.so
+libaaudio.so
+libc.so
+libcamera2ndk.so
+libdl.so
+libEGL.so
+libGLESv1_CM.so
+libGLESv2.so
+libGLESv3.so
+libicui18n.so
+libicuuc.so
+libjnigraphics.so
+liblog.so
+libmediandk.so
+libm.so
+libnativewindow.so
+libneuralnetworks.so
+libOpenMAXAL.so
+libOpenSLES.so
+libRS.so
+libstdc++.so
+libsync.so
+libvulkan.so
+libwebviewchromium_plat_support.so
+libz.so
diff --git a/rootdir/init.rc b/rootdir/init.rc
index b9464e7..f21490f 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -31,6 +31,9 @@
     # root memory control cgroup, used by lmkd
     mkdir /dev/memcg 0700 root system
     mount cgroup none /dev/memcg nodev noexec nosuid memory
+    # memory.pressure_level used by lmkd
+    chown root system /dev/memcg/memory.pressure_level
+    chmod 0040 /dev/memcg/memory.pressure_level
     # app mem cgroups, used by activity manager, lmkd and zygote
     mkdir /dev/memcg/apps/ 0755 system system
     # cgroup for system_server and surfaceflinger
@@ -520,6 +523,7 @@
     mkdir /data/ss 0700 system system
 
     mkdir /data/system 0775 system system
+    mkdir /data/system/dropbox 0700 system system
     mkdir /data/system/heapdump 0700 system system
     mkdir /data/system/users 0775 system system
 
diff --git a/shell_and_utilities/Android.bp b/shell_and_utilities/Android.bp
index 2e42b70..6438e3d 100644
--- a/shell_and_utilities/Android.bp
+++ b/shell_and_utilities/Android.bp
@@ -12,10 +12,13 @@
         "mkshrc_vendor",
         "reboot",
         "sh",
+        "sh.recovery",
         "sh_vendor",
         "toolbox",
+        "toolbox.recovery",
         "toolbox_vendor",
         "toybox",
+        "toybox.recovery",
         "toybox_vendor",
     ],
 }
diff --git a/shell_and_utilities/README.md b/shell_and_utilities/README.md
index c423c69..b15be1f 100644
--- a/shell_and_utilities/README.md
+++ b/shell_and_utilities/README.md
@@ -18,11 +18,9 @@
 (a) didn't stand out given all the other systems-level changes and (b)
 in Marshmallow we changed direction and started the move to toybox.
 
-Not everything is provided by toybox, though. We currently still use
-the BSD dd and grep (because the toybox versions are still unfinished),
-and for the bzip2 command-line tools we use the ones that are part of
-the bzip2 distribution. The awk added in Android P is Brian Kernighan's
-"one true" awk.
+Not everything is provided by toybox, though. For the bzip2 command-line tools
+we use the ones that are part of the bzip2 distribution. The awk added in
+Android P is Brian Kernighan's "one true" awk.
 
 The lists below show what tools were provided and where they came from in
 each release starting with Gingerbread. This doesn't tell the full story,
@@ -179,15 +177,41 @@
 
 toybox: acpi base64 basename blockdev cal cat chcon chgrp chmod chown
 chroot chrt cksum clear cmp comm cp cpio cut date df diff dirname dmesg
-dos2unix du echo env expand expr fallocate false file find flock free
+dos2unix du echo env expand expr fallocate false file find flock fmt free
 getenforce groups gunzip gzip head hostname hwclock id ifconfig inotifyd
-insmod ionice iorenice kill killall ln load\_policy log logname losetup
-ls lsmod lsof lspci lsusb md5sum microcom mkdir mkfifo mknod mkswap
-mktemp modinfo modprobe more mount mountpoint mv netstat nice nl nohup
-od paste patch pgrep pidof pkill pmap printenv printf ps pwd readlink
-realpath renice restorecon rm rmdir rmmod runcon sed sendevent seq
-setenforce setprop setsid sha1sum sha224sum sha256sum sha384sum
-sha512sum sleep sort split start stat stop strings swapoff swapon sync
-sysctl tac tail tar taskset tee time timeout top touch tr true truncate
-tty ulimit umount uname uniq unix2dos uptime usleep uudecode uuencode
-vmstat wc which whoami xargs xxd yes zcat
+insmod ionice iorenice kill killall ln load\_policy log logname losetup ls
+lsmod lsof lspci lsusb md5sum microcom mkdir mkfifo mknod mkswap mktemp
+modinfo modprobe more mount mountpoint mv netstat nice nl nohup od paste
+patch pgrep pidof pkill pmap printenv printf ps pwd readlink realpath
+renice restorecon rm rmdir rmmod runcon sed sendevent seq setenforce
+setprop setsid sha1sum sha224sum sha256sum sha384sum sha512sum sleep
+sort split start stat stop strings stty swapoff swapon sync sysctl tac
+tail tar taskset tee time timeout top touch tr true truncate tty ulimit
+umount uname uniq unix2dos uptime usleep uudecode uuencode vmstat wc
+which whoami xargs xxd yes zcat
+
+Android Q
+---------
+
+bzip2: bzcat bzip2 bunzip2
+
+one-true-awk: awk
+
+PCRE: egrep fgrep grep
+
+toolbox: getevent getprop newfs\_msdos
+
+toybox: acpi base64 basename blockdev cal cat chcon chgrp chmod chown
+chroot chrt cksum clear cmp comm cp cpio cut date dd df diff dirname
+dmesg dos2unix du echo env expand expr fallocate false file find flock
+fmt free getenforce groups gunzip gzip head hostname hwclock id ifconfig
+inotifyd insmod ionice iorenice kill killall ln load\_policy log logname
+losetup ls lsmod lsof lspci lsusb md5sum microcom mkdir mkfifo mknod
+mkswap mktemp modinfo modprobe more mount mountpoint mv nc netcat netstat
+nice nl nohup nsenter od paste patch pgrep pidof pkill pmap printenv
+printf ps pwd readlink realpath renice restorecon rm rmdir rmmod runcon
+sed sendevent seq setenforce setprop setsid sha1sum sha224sum sha256sum
+sha384sum sha512sum sleep sort split start stat stop strings stty swapoff
+swapon sync sysctl tac tail tar taskset tee time timeout top touch tr
+true truncate tty ulimit umount uname uniq unix2dos unshare uptime usleep
+uudecode uuencode vmstat wc which whoami xargs xxd yes zcat
diff --git a/storaged/OWNERS b/storaged/OWNERS
index 7445270..d033f00 100644
--- a/storaged/OWNERS
+++ b/storaged/OWNERS
@@ -1 +1,2 @@
-jinqian@google.com
+salyzyn@google.com
+dvander@google.com
diff --git a/storaged/main.cpp b/storaged/main.cpp
index b3f1281..3817fb5 100644
--- a/storaged/main.cpp
+++ b/storaged/main.cpp
@@ -21,9 +21,6 @@
 #include <getopt.h>
 #include <pthread.h>
 #include <stdio.h>
-#include <sys/capability.h>
-#include <sys/prctl.h>
-#include <sys/resource.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <vector>
diff --git a/toolbox/Android.bp b/toolbox/Android.bp
index ddd95b2..f12c810 100644
--- a/toolbox/Android.bp
+++ b/toolbox/Android.bp
@@ -5,32 +5,8 @@
         "-Werror",
         "-Wno-unused-parameter",
         "-Wno-unused-const-variable",
-        "-include bsd-compatibility.h",
         "-D_FILE_OFFSET_BITS=64",
-    ],
-    local_include_dirs: ["upstream-netbsd/include/"],
-}
-
-cc_library_static {
-    name: "libtoolbox_dd",
-    defaults: ["toolbox_defaults"],
-    vendor_available: true,
-    srcs: [
-        "upstream-netbsd/bin/dd/args.c",
-        "upstream-netbsd/bin/dd/conv.c",
-        "upstream-netbsd/bin/dd/dd.c",
-        "upstream-netbsd/bin/dd/dd_hostops.c",
-        "upstream-netbsd/bin/dd/misc.c",
-        "upstream-netbsd/bin/dd/position.c",
-        "upstream-netbsd/lib/libc/gen/getbsize.c",
-        "upstream-netbsd/lib/libc/gen/humanize_number.c",
-        "upstream-netbsd/lib/libc/stdlib/strsuftoll.c",
-        "upstream-netbsd/lib/libc/string/swab.c",
-        "upstream-netbsd/lib/libutil/raise_default_signal.c",
-    ],
-    cflags: [
-        "-Dmain=dd_main",
-        "-DNO_CONV",
+        "-DWITHOUT_NLS",
     ],
 }
 
@@ -55,15 +31,12 @@
     generated_headers: [
         "toolbox_input_labels",
     ],
-    whole_static_libs: ["libtoolbox_dd"],
     shared_libs: [
         "libbase",
-        "libcutils",
     ],
     static_libs: ["libpropertyinfoparser"],
 
     symlinks: [
-        "dd",
         "getevent",
         "getprop",
         "newfs_msdos",
@@ -73,6 +46,7 @@
 cc_binary {
     name: "toolbox",
     defaults: ["toolbox_binary_defaults"],
+    recovery_available: true,
 }
 
 cc_binary {
@@ -89,38 +63,9 @@
     srcs: ["r.c"],
 }
 
-// We build BSD grep separately, so it can provide egrep and fgrep too.
-cc_defaults {
-    name: "grep_common",
+cc_binary_host {
+    name: "newfs_msdos",
     defaults: ["toolbox_defaults"],
-    srcs: [
-        "upstream-netbsd/usr.bin/grep/fastgrep.c",
-        "upstream-netbsd/usr.bin/grep/file.c",
-        "upstream-netbsd/usr.bin/grep/grep.c",
-        "upstream-netbsd/usr.bin/grep/queue.c",
-        "upstream-netbsd/usr.bin/grep/util.c",
-    ],
-    symlinks: [
-        "egrep",
-        "fgrep",
-    ],
-
-    sanitize: {
-        integer_overflow: false,
-    },
-}
-
-cc_binary {
-    name: "grep",
-    defaults: ["grep_common"],
-}
-
-// Build vendor grep.
-// TODO: Add vendor_available to "grep" module and remove "grep_vendor" module
-//       when vendor_available is fully supported.
-cc_binary {
-    name: "grep_vendor",
-    stem: "grep",
-    vendor: true,
-    defaults: ["grep_common"],
+    srcs: ["newfs_msdos.c"],
+    cflags: ["-Dnewfs_msdos_main=main"]
 }
diff --git a/toolbox/bsd-compatibility.h b/toolbox/bsd-compatibility.h
deleted file mode 100644
index 7c3ddd4..0000000
--- a/toolbox/bsd-compatibility.h
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * Copyright (C) 2014, The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <stdbool.h>
-#include <sys/types.h>
-
-/* We want chown to support user.group as well as user:group. */
-#define SUPPORT_DOT
-
-/* We don't localize /system/bin! */
-#define WITHOUT_NLS
-
-// NetBSD uses _DIAGASSERT to null-check arguments and the like.
-#include <assert.h>
-#define _DIAGASSERT(e) ((e) ? (void) 0 : __assert2(__FILE__, __LINE__, __func__, #e))
-
-// TODO: update our <sys/cdefs.h> to support this properly.
-#define __type_fit(t, a) (0 == 0)
-
-// TODO: should this be in our <sys/cdefs.h>?
-#define __arraycount(a) (sizeof(a) / sizeof((a)[0]))
-
-// This at least matches GNU dd(1) behavior.
-#define SIGINFO SIGUSR1
-
-#define S_ISWHT(x) false
-
-__BEGIN_DECLS
-
-/* From NetBSD <stdlib.h>. */
-#define HN_DECIMAL              0x01
-#define HN_NOSPACE              0x02
-#define HN_B                    0x04
-#define HN_DIVISOR_1000         0x08
-#define HN_GETSCALE             0x10
-#define HN_AUTOSCALE            0x20
-int	humanize_number(char *, size_t, int64_t, const char *, int, int);
-int	dehumanize_number(const char *, int64_t *);
-char	*getbsize(int *, long *);
-long long strsuftoll(const char *, const char *, long long, long long);
-long long strsuftollx(const char *, const char *, long long, long long,
-			char *, size_t);
-
-/* From NetBSD <string.h>. */
-void strmode(mode_t, char*);
-
-/* From NetBSD <sys/param.h>. */
-#define MAXBSIZE 65536
-
-/* From NetBSD <sys/stat.h>. */
-#define DEFFILEMODE (S_IRUSR | S_IWUSR)
-
-/* From NetBSD <unistd.h>. */
-void	swab(const void * __restrict, void * __restrict, ssize_t);
-
-/* From NetBSD <util.h>. */
-int		raise_default_signal(int);
-
-__END_DECLS
diff --git a/toolbox/newfs_msdos.c b/toolbox/newfs_msdos.c
index d7047e2..5fc8b02 100644
--- a/toolbox/newfs_msdos.c
+++ b/toolbox/newfs_msdos.c
@@ -32,15 +32,17 @@
 
 #include <sys/param.h>
 
-#ifndef ANDROID
+#ifdef __APPLE__
+#elif defined(ANDROID)
+#include <linux/fs.h>
+#include <linux/hdreg.h>
+#include <stdarg.h>
+#include <sys/ioctl.h>
+#else
 #include <sys/fdcio.h>
 #include <sys/disk.h>
 #include <sys/disklabel.h>
 #include <sys/mount.h>
-#else
-#include <stdarg.h>
-#include <linux/fs.h>
-#include <linux/hdreg.h>
 #endif
 
 #include <sys/stat.h>
@@ -58,6 +60,10 @@
 #include <time.h>
 #include <unistd.h>
 
+#ifndef __unused
+#define __unused __attribute__((__unused__))
+#endif
+
 #define MAXU16   0xffff     /* maximum unsigned 16-bit quantity */
 #define BPN      4          /* bits per nibble */
 #define NPB      2          /* nibbles per byte */
@@ -794,7 +800,10 @@
  * Get disk slice, partition, and geometry information.
  */
 
-#ifdef ANDROID
+#ifdef __APPLE__
+static void getdiskinfo(__unused int fd, __unused const char* fname, __unused const char* dtype,
+                        __unused int oflag, __unused struct bpb* bpb) {}
+#elif ANDROID
 static void getdiskinfo(int fd, const char *fname, const char *dtype,
                         __unused int oflag,struct bpb *bpb)
 {
diff --git a/toolbox/tools.h b/toolbox/tools.h
index 505f528..3d4bc3e 100644
--- a/toolbox/tools.h
+++ b/toolbox/tools.h
@@ -1,4 +1,3 @@
-TOOL(dd)
 TOOL(getevent)
 TOOL(getprop)
 TOOL(newfs_msdos)
diff --git a/toolbox/upstream-netbsd/bin/dd/args.c b/toolbox/upstream-netbsd/bin/dd/args.c
deleted file mode 100644
index 207e300..0000000
--- a/toolbox/upstream-netbsd/bin/dd/args.c
+++ /dev/null
@@ -1,391 +0,0 @@
-/*	$NetBSD: args.c,v 1.38 2013/07/17 12:55:48 christos Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993, 1994
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Keith Muller of the University of California, San Diego and Lance
- * Visser of Convex Computer Corporation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)args.c	8.3 (Berkeley) 4/2/94";
-#else
-__RCSID("$NetBSD: args.c,v 1.38 2013/07/17 12:55:48 christos Exp $");
-#endif
-#endif /* not lint */
-
-#include <sys/types.h>
-#include <sys/time.h>
-
-#include <err.h>
-#include <errno.h>
-#include <limits.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "dd.h"
-#include "extern.h"
-
-static int	c_arg(const void *, const void *);
-
-#ifdef NO_MSGFMT
-static void	f_msgfmt(char *) __dead;
-#else
-static void	f_msgfmt(char *);
-#endif /* NO_MSGFMT */
-
-#ifdef NO_CONV
-static void	f_conv(char *) __dead;
-#else
-static void	f_conv(char *);
-static int	c_conv(const void *, const void *);
-#endif /* NO_CONV */
-
-static void	f_bs(char *);
-static void	f_cbs(char *);
-static void	f_count(char *);
-static void	f_files(char *);
-static void	f_ibs(char *);
-static void	f_if(char *);
-static void	f_obs(char *);
-static void	f_of(char *);
-static void	f_seek(char *);
-static void	f_skip(char *);
-static void	f_progress(char *);
-
-static const struct arg {
-	const char *name;
-	void (*f)(char *);
-	u_int set, noset;
-} args[] = {
-     /* the array needs to be sorted by the first column so
-	bsearch() can be used to find commands quickly */
-	{ "bs",		f_bs,		C_BS,	 C_BS|C_IBS|C_OBS|C_OSYNC },
-	{ "cbs",	f_cbs,		C_CBS,	 C_CBS },
-	{ "conv",	f_conv,		0,	 0 },
-	{ "count",	f_count,	C_COUNT, C_COUNT },
-	{ "files",	f_files,	C_FILES, C_FILES },
-	{ "ibs",	f_ibs,		C_IBS,	 C_BS|C_IBS },
-	{ "if",		f_if,		C_IF,	 C_IF },
-	{ "iseek",	f_skip,		C_SKIP,	 C_SKIP },
-	{ "msgfmt",	f_msgfmt,	0,	 0 },
-	{ "obs",	f_obs,		C_OBS,	 C_BS|C_OBS },
-	{ "of",		f_of,		C_OF,	 C_OF },
-	{ "oseek",	f_seek,		C_SEEK,	 C_SEEK },
-	{ "progress",	f_progress,	0,	 0 },
-	{ "seek",	f_seek,		C_SEEK,	 C_SEEK },
-	{ "skip",	f_skip,		C_SKIP,	 C_SKIP },
-};
-
-/*
- * args -- parse JCL syntax of dd.
- */
-void
-jcl(char **argv)
-{
-	struct arg *ap, tmp;
-	char *oper, *arg;
-
-	in.dbsz = out.dbsz = 512;
-
-	while ((oper = *++argv) != NULL) {
-		if ((oper = strdup(oper)) == NULL) {
-			errx(EXIT_FAILURE,
-			    "unable to allocate space for the argument %s",
-			    *argv);
-			/* NOTREACHED */
-		}
-		if ((arg = strchr(oper, '=')) == NULL) {
-			errx(EXIT_FAILURE, "unknown operand %s", oper);
-			/* NOTREACHED */
-		}
-		*arg++ = '\0';
-		if (!*arg) {
-			errx(EXIT_FAILURE, "no value specified for %s", oper);
-			/* NOTREACHED */
-		}
-		tmp.name = oper;
-		if (!(ap = bsearch(&tmp, args,
-		    __arraycount(args), sizeof(*args), c_arg))) {
-			errx(EXIT_FAILURE, "unknown operand %s", tmp.name);
-			/* NOTREACHED */
-		}
-		if (ddflags & ap->noset) {
-			errx(EXIT_FAILURE,
-			    "%s: illegal argument combination or already set",
-			    tmp.name);
-			/* NOTREACHED */
-		}
-		ddflags |= ap->set;
-		ap->f(arg);
-	}
-
-	/* Final sanity checks. */
-
-	if (ddflags & C_BS) {
-		/*
-		 * Bs is turned off by any conversion -- we assume the user
-		 * just wanted to set both the input and output block sizes
-		 * and didn't want the bs semantics, so we don't warn.
-		 */
-		if (ddflags & (C_BLOCK | C_LCASE | C_SWAB | C_UCASE |
-		    C_UNBLOCK | C_OSYNC | C_ASCII | C_EBCDIC | C_SPARSE)) {
-			ddflags &= ~C_BS;
-			ddflags |= C_IBS|C_OBS;
-		}
-
-		/* Bs supersedes ibs and obs. */
-		if (ddflags & C_BS && ddflags & (C_IBS|C_OBS))
-			warnx("bs supersedes ibs and obs");
-	}
-
-	/*
-	 * Ascii/ebcdic and cbs implies block/unblock.
-	 * Block/unblock requires cbs and vice-versa.
-	 */
-	if (ddflags & (C_BLOCK|C_UNBLOCK)) {
-		if (!(ddflags & C_CBS)) {
-			errx(EXIT_FAILURE, "record operations require cbs");
-			/* NOTREACHED */
-		}
-		cfunc = ddflags & C_BLOCK ? block : unblock;
-	} else if (ddflags & C_CBS) {
-		if (ddflags & (C_ASCII|C_EBCDIC)) {
-			if (ddflags & C_ASCII) {
-				ddflags |= C_UNBLOCK;
-				cfunc = unblock;
-			} else {
-				ddflags |= C_BLOCK;
-				cfunc = block;
-			}
-		} else {
-			errx(EXIT_FAILURE,
-			    "cbs meaningless if not doing record operations");
-			/* NOTREACHED */
-		}
-	} else
-		cfunc = def;
-
-	/* Read, write and seek calls take off_t as arguments.
-	 *
-	 * The following check is not done because an off_t is a quad
-	 *  for current NetBSD implementations.
-	 *
-	 * if (in.offset > INT_MAX/in.dbsz || out.offset > INT_MAX/out.dbsz)
-	 *	errx(1, "seek offsets cannot be larger than %d", INT_MAX);
-	 */
-}
-
-static int
-c_arg(const void *a, const void *b)
-{
-
-	return (strcmp(((const struct arg *)a)->name,
-	    ((const struct arg *)b)->name));
-}
-
-static void
-f_bs(char *arg)
-{
-
-	in.dbsz = out.dbsz = strsuftoll("block size", arg, 1, UINT_MAX);
-}
-
-static void
-f_cbs(char *arg)
-{
-
-	cbsz = strsuftoll("conversion record size", arg, 1, UINT_MAX);
-}
-
-static void
-f_count(char *arg)
-{
-
-	cpy_cnt = strsuftoll("block count", arg, 0, LLONG_MAX);
-	if (!cpy_cnt)
-		terminate(0);
-}
-
-static void
-f_files(char *arg)
-{
-
-	files_cnt = (u_int)strsuftoll("file count", arg, 0, UINT_MAX);
-	if (!files_cnt)
-		terminate(0);
-}
-
-static void
-f_ibs(char *arg)
-{
-
-	if (!(ddflags & C_BS))
-		in.dbsz = strsuftoll("input block size", arg, 1, UINT_MAX);
-}
-
-static void
-f_if(char *arg)
-{
-
-	in.name = arg;
-}
-
-#ifdef NO_MSGFMT
-/* Build a small version (i.e. for a ramdisk root) */
-static void
-f_msgfmt(char *arg)
-{
-
-	errx(EXIT_FAILURE, "msgfmt option disabled");
-	/* NOTREACHED */
-}
-#else	/* NO_MSGFMT */
-static void
-f_msgfmt(char *arg)
-{
-
-	/*
-	 * If the format string is not valid, dd_write_msg() will print
-	 * an error and exit.
-	 */
-	dd_write_msg(arg, 0);
-
-	msgfmt = arg;
-}
-#endif	/* NO_MSGFMT */
-
-static void
-f_obs(char *arg)
-{
-
-	if (!(ddflags & C_BS))
-		out.dbsz = strsuftoll("output block size", arg, 1, UINT_MAX);
-}
-
-static void
-f_of(char *arg)
-{
-
-	out.name = arg;
-}
-
-static void
-f_seek(char *arg)
-{
-
-	out.offset = strsuftoll("seek blocks", arg, 0, LLONG_MAX);
-}
-
-static void
-f_skip(char *arg)
-{
-
-	in.offset = strsuftoll("skip blocks", arg, 0, LLONG_MAX);
-}
-
-static void
-f_progress(char *arg)
-{
-
-	progress = strsuftoll("progress blocks", arg, 0, LLONG_MAX);
-}
-
-#ifdef	NO_CONV
-/* Build a small version (i.e. for a ramdisk root) */
-static void
-f_conv(char *arg)
-{
-
-	errx(EXIT_FAILURE, "conv option disabled");
-	/* NOTREACHED */
-}
-#else	/* NO_CONV */
-
-static const struct conv {
-	const char *name;
-	u_int set, noset;
-	const u_char *ctab;
-} clist[] = {
-	{ "ascii",	C_ASCII,	C_EBCDIC,	e2a_POSIX },
-	{ "block",	C_BLOCK,	C_UNBLOCK,	NULL },
-	{ "ebcdic",	C_EBCDIC,	C_ASCII,	a2e_POSIX },
-	{ "ibm",	C_EBCDIC,	C_ASCII,	a2ibm_POSIX },
-	{ "lcase",	C_LCASE,	C_UCASE,	NULL },
-	{ "noerror",	C_NOERROR,	0,		NULL },
-	{ "notrunc",	C_NOTRUNC,	0,		NULL },
-	{ "oldascii",	C_ASCII,	C_EBCDIC,	e2a_32V },
-	{ "oldebcdic",	C_EBCDIC,	C_ASCII,	a2e_32V },
-	{ "oldibm",	C_EBCDIC,	C_ASCII,	a2ibm_32V },
-	{ "osync",	C_OSYNC,	C_BS,		NULL },
-	{ "sparse",	C_SPARSE,	0,		NULL },
-	{ "swab",	C_SWAB,		0,		NULL },
-	{ "sync",	C_SYNC,		0,		NULL },
-	{ "ucase",	C_UCASE,	C_LCASE,	NULL },
-	{ "unblock",	C_UNBLOCK,	C_BLOCK,	NULL },
-	/* If you add items to this table, be sure to add the
-	 * conversions to the C_BS check in the jcl routine above.
-	 */
-};
-
-static void
-f_conv(char *arg)
-{
-	struct conv *cp, tmp;
-
-	while (arg != NULL) {
-		tmp.name = strsep(&arg, ",");
-		if (!(cp = bsearch(&tmp, clist,
-		    __arraycount(clist), sizeof(*clist), c_conv))) {
-			errx(EXIT_FAILURE, "unknown conversion %s", tmp.name);
-			/* NOTREACHED */
-		}
-		if (ddflags & cp->noset) {
-			errx(EXIT_FAILURE,
-			    "%s: illegal conversion combination", tmp.name);
-			/* NOTREACHED */
-		}
-		ddflags |= cp->set;
-		if (cp->ctab)
-			ctab = cp->ctab;
-	}
-}
-
-static int
-c_conv(const void *a, const void *b)
-{
-
-	return (strcmp(((const struct conv *)a)->name,
-	    ((const struct conv *)b)->name));
-}
-
-#endif	/* NO_CONV */
diff --git a/toolbox/upstream-netbsd/bin/dd/conv.c b/toolbox/upstream-netbsd/bin/dd/conv.c
deleted file mode 100644
index d4a8a09..0000000
--- a/toolbox/upstream-netbsd/bin/dd/conv.c
+++ /dev/null
@@ -1,283 +0,0 @@
-/*	$NetBSD: conv.c,v 1.17 2003/08/07 09:05:10 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993, 1994
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Keith Muller of the University of California, San Diego and Lance
- * Visser of Convex Computer Corporation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)conv.c	8.3 (Berkeley) 4/2/94";
-#else
-__RCSID("$NetBSD: conv.c,v 1.17 2003/08/07 09:05:10 agc Exp $");
-#endif
-#endif /* not lint */
-
-#include <sys/param.h>
-#include <sys/time.h>
-
-#include <err.h>
-#include <string.h>
-#include <stdlib.h>
-
-#include "dd.h"
-#include "extern.h"
-
-/*
- * def --
- * Copy input to output.  Input is buffered until reaches obs, and then
- * output until less than obs remains.  Only a single buffer is used.
- * Worst case buffer calculation is (ibs + obs - 1).
- */
-void
-def(void)
-{
-	uint64_t cnt;
-	u_char *inp;
-	const u_char *t;
-
-	if ((t = ctab) != NULL)
-		for (inp = in.dbp - (cnt = in.dbrcnt); cnt--; ++inp)
-			*inp = t[*inp];
-
-	/* Make the output buffer look right. */
-	out.dbp = in.dbp;
-	out.dbcnt = in.dbcnt;
-
-	if (in.dbcnt >= out.dbsz) {
-		/* If the output buffer is full, write it. */
-		dd_out(0);
-
-		/*
-		 * Ddout copies the leftover output to the beginning of
-		 * the buffer and resets the output buffer.  Reset the
-		 * input buffer to match it.
-	 	 */
-		in.dbp = out.dbp;
-		in.dbcnt = out.dbcnt;
-	}
-}
-
-void
-def_close(void)
-{
-
-	/* Just update the count, everything is already in the buffer. */
-	if (in.dbcnt)
-		out.dbcnt = in.dbcnt;
-}
-
-#ifdef	NO_CONV
-/* Build a smaller version (i.e. for a miniroot) */
-/* These can not be called, but just in case...  */
-static const char no_block[] = "unblock and -DNO_CONV?";
-void block(void)		{ errx(EXIT_FAILURE, "%s", no_block + 2); }
-void block_close(void)		{ errx(EXIT_FAILURE, "%s", no_block + 2); }
-void unblock(void)		{ errx(EXIT_FAILURE, "%s", no_block); }
-void unblock_close(void)	{ errx(EXIT_FAILURE, "%s", no_block); }
-#else	/* NO_CONV */
-
-/*
- * Copy variable length newline terminated records with a max size cbsz
- * bytes to output.  Records less than cbs are padded with spaces.
- *
- * max in buffer:  MAX(ibs, cbsz)
- * max out buffer: obs + cbsz
- */
-void
-block(void)
-{
-	static int intrunc;
-	int ch = 0;	/* pacify gcc */
-	uint64_t cnt, maxlen;
-	u_char *inp, *outp;
-	const u_char *t;
-
-	/*
-	 * Record truncation can cross block boundaries.  If currently in a
-	 * truncation state, keep tossing characters until reach a newline.
-	 * Start at the beginning of the buffer, as the input buffer is always
-	 * left empty.
-	 */
-	if (intrunc) {
-		for (inp = in.db, cnt = in.dbrcnt;
-		    cnt && *inp++ != '\n'; --cnt);
-		if (!cnt) {
-			in.dbcnt = 0;
-			in.dbp = in.db;
-			return;
-		}
-		intrunc = 0;
-		/* Adjust the input buffer numbers. */
-		in.dbcnt = cnt - 1;
-		in.dbp = inp + cnt - 1;
-	}
-
-	/*
-	 * Copy records (max cbsz size chunks) into the output buffer.  The
-	 * translation is done as we copy into the output buffer.
-	 */
-	for (inp = in.dbp - in.dbcnt, outp = out.dbp; in.dbcnt;) {
-		maxlen = MIN(cbsz, in.dbcnt);
-		if ((t = ctab) != NULL)
-			for (cnt = 0;
-			    cnt < maxlen && (ch = *inp++) != '\n'; ++cnt)
-				*outp++ = t[ch];
-		else
-			for (cnt = 0;
-			    cnt < maxlen && (ch = *inp++) != '\n'; ++cnt)
-				*outp++ = ch;
-		/*
-		 * Check for short record without a newline.  Reassemble the
-		 * input block.
-		 */
-		if (ch != '\n' && in.dbcnt < cbsz) {
-			(void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
-			break;
-		}
-
-		/* Adjust the input buffer numbers. */
-		in.dbcnt -= cnt;
-		if (ch == '\n')
-			--in.dbcnt;
-
-		/* Pad short records with spaces. */
-		if (cnt < cbsz)
-			(void)memset(outp, ctab ? ctab[' '] : ' ', cbsz - cnt);
-		else {
-			/*
-			 * If the next character wouldn't have ended the
-			 * block, it's a truncation.
-			 */
-			if (!in.dbcnt || *inp != '\n')
-				++st.trunc;
-
-			/* Toss characters to a newline. */
-			for (; in.dbcnt && *inp++ != '\n'; --in.dbcnt);
-			if (!in.dbcnt)
-				intrunc = 1;
-			else
-				--in.dbcnt;
-		}
-
-		/* Adjust output buffer numbers. */
-		out.dbp += cbsz;
-		if ((out.dbcnt += cbsz) >= out.dbsz)
-			dd_out(0);
-		outp = out.dbp;
-	}
-	in.dbp = in.db + in.dbcnt;
-}
-
-void
-block_close(void)
-{
-
-	/*
-	 * Copy any remaining data into the output buffer and pad to a record.
-	 * Don't worry about truncation or translation, the input buffer is
-	 * always empty when truncating, and no characters have been added for
-	 * translation.  The bottom line is that anything left in the input
-	 * buffer is a truncated record.  Anything left in the output buffer
-	 * just wasn't big enough.
-	 */
-	if (in.dbcnt) {
-		++st.trunc;
-		(void)memmove(out.dbp, in.dbp - in.dbcnt, in.dbcnt);
-		(void)memset(out.dbp + in.dbcnt,
-		    ctab ? ctab[' '] : ' ', cbsz - in.dbcnt);
-		out.dbcnt += cbsz;
-	}
-}
-
-/*
- * Convert fixed length (cbsz) records to variable length.  Deletes any
- * trailing blanks and appends a newline.
- *
- * max in buffer:  MAX(ibs, cbsz) + cbsz
- * max out buffer: obs + cbsz
- */
-void
-unblock(void)
-{
-	uint64_t cnt;
-	u_char *inp;
-	const u_char *t;
-
-	/* Translation and case conversion. */
-	if ((t = ctab) != NULL)
-		for (cnt = in.dbrcnt, inp = in.dbp - 1; cnt--; inp--)
-			*inp = t[*inp];
-	/*
-	 * Copy records (max cbsz size chunks) into the output buffer.  The
-	 * translation has to already be done or we might not recognize the
-	 * spaces.
-	 */
-	for (inp = in.db; in.dbcnt >= cbsz; inp += cbsz, in.dbcnt -= cbsz) {
-		for (t = inp + cbsz - 1; t >= inp && *t == ' '; --t);
-		if (t >= inp) {
-			cnt = t - inp + 1;
-			(void)memmove(out.dbp, inp, cnt);
-			out.dbp += cnt;
-			out.dbcnt += cnt;
-		}
-		++out.dbcnt;
-		*out.dbp++ = '\n';
-		if (out.dbcnt >= out.dbsz)
-			dd_out(0);
-	}
-	if (in.dbcnt)
-		(void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
-	in.dbp = in.db + in.dbcnt;
-}
-
-void
-unblock_close(void)
-{
-	uint64_t cnt;
-	u_char *t;
-
-	if (in.dbcnt) {
-		warnx("%s: short input record", in.name);
-		for (t = in.db + in.dbcnt - 1; t >= in.db && *t == ' '; --t);
-		if (t >= in.db) {
-			cnt = t - in.db + 1;
-			(void)memmove(out.dbp, in.db, cnt);
-			out.dbp += cnt;
-			out.dbcnt += cnt;
-		}
-		++out.dbcnt;
-		*out.dbp++ = '\n';
-	}
-}
-
-#endif	/* NO_CONV */
diff --git a/toolbox/upstream-netbsd/bin/dd/dd.c b/toolbox/upstream-netbsd/bin/dd/dd.c
deleted file mode 100644
index 03d080c..0000000
--- a/toolbox/upstream-netbsd/bin/dd/dd.c
+++ /dev/null
@@ -1,598 +0,0 @@
-/*	$NetBSD: dd.c,v 1.49 2012/02/21 01:49:01 matt Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993, 1994
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Keith Muller of the University of California, San Diego and Lance
- * Visser of Convex Computer Corporation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-__COPYRIGHT("@(#) Copyright (c) 1991, 1993, 1994\
- The Regents of the University of California.  All rights reserved.");
-#endif /* not lint */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)dd.c	8.5 (Berkeley) 4/2/94";
-#else
-__RCSID("$NetBSD: dd.c,v 1.49 2012/02/21 01:49:01 matt Exp $");
-#endif
-#endif /* not lint */
-
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <sys/mtio.h>
-#include <sys/time.h>
-
-#include <ctype.h>
-#include <err.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <locale.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "dd.h"
-#include "extern.h"
-
-static void dd_close(void);
-static void dd_in(void);
-static void getfdtype(IO *);
-static void redup_clean_fd(IO *);
-static void setup(void);
-
-int main(int, char *[]);
-
-IO		in, out;		/* input/output state */
-STAT		st;			/* statistics */
-void		(*cfunc)(void);		/* conversion function */
-uint64_t	cpy_cnt;		/* # of blocks to copy */
-static off_t	pending = 0;		/* pending seek if sparse */
-u_int		ddflags;		/* conversion options */
-uint64_t	cbsz;			/* conversion block size */
-u_int		files_cnt = 1;		/* # of files to copy */
-uint64_t	progress = 0;		/* display sign of life */
-const u_char	*ctab;			/* conversion table */
-sigset_t	infoset;		/* a set blocking SIGINFO */
-const char	*msgfmt = "posix";	/* default summary() message format */
-
-/*
- * Ops for stdin/stdout and crunch'd dd.  These are always host ops.
- */
-static const struct ddfops ddfops_stdfd = {
-	.op_open = open,
-	.op_close = close,
-	.op_fcntl = fcntl,
-	.op_ioctl = ioctl,
-	.op_fstat = fstat,
-	.op_fsync = fsync,
-	.op_ftruncate = ftruncate,
-	.op_lseek = lseek,
-	.op_read = read,
-	.op_write = write,
-};
-extern const struct ddfops ddfops_prog;
-
-int
-main(int argc, char *argv[])
-{
-	int ch;
-
-	setprogname(argv[0]);
-	(void)setlocale(LC_ALL, "");
-
-	while ((ch = getopt(argc, argv, "")) != -1) {
-		switch (ch) {
-		default:
-			errx(EXIT_FAILURE, "usage: dd [operand ...]");
-			/* NOTREACHED */
-		}
-	}
-	argc -= (optind - 1);
-	argv += (optind - 1);
-
-	jcl(argv);
-#ifndef CRUNCHOPS
-	if (ddfops_prog.op_init && ddfops_prog.op_init() == -1)
-		err(1, "prog init");
-#endif
-	setup();
-
-	(void)signal(SIGINFO, summaryx);
-	(void)signal(SIGINT, terminate);
-	(void)sigemptyset(&infoset);
-	(void)sigaddset(&infoset, SIGINFO);
-
-	(void)atexit(summary);
-
-	while (files_cnt--)
-		dd_in();
-
-	dd_close();
-	exit(0);
-	/* NOTREACHED */
-}
-
-static void
-setup(void)
-{
-#ifdef CRUNCHOPS
-	const struct ddfops *prog_ops = &ddfops_stdfd;
-#else
-	const struct ddfops *prog_ops = &ddfops_prog;
-#endif
-
-	if (in.name == NULL) {
-		in.name = "stdin";
-		in.fd = STDIN_FILENO;
-		in.ops = &ddfops_stdfd;
-	} else {
-		in.ops = prog_ops;
-		in.fd = ddop_open(in, in.name, O_RDONLY, 0);
-		if (in.fd < 0)
-			err(EXIT_FAILURE, "%s", in.name);
-			/* NOTREACHED */
-
-		/* Ensure in.fd is outside the stdio descriptor range */
-		redup_clean_fd(&in);
-	}
-
-	getfdtype(&in);
-
-	if (files_cnt > 1 && !(in.flags & ISTAPE)) {
-		errx(EXIT_FAILURE, "files is not supported for non-tape devices");
-		/* NOTREACHED */
-	}
-
-	if (out.name == NULL) {
-		/* No way to check for read access here. */
-		out.fd = STDOUT_FILENO;
-		out.name = "stdout";
-		out.ops = &ddfops_stdfd;
-	} else {
-		out.ops = prog_ops;
-#define	OFLAGS \
-    (O_CREAT | (ddflags & (C_SEEK | C_NOTRUNC) ? 0 : O_TRUNC))
-		out.fd = ddop_open(out, out.name, O_RDWR | OFLAGS, DEFFILEMODE);
-		/*
-		 * May not have read access, so try again with write only.
-		 * Without read we may have a problem if output also does
-		 * not support seeks.
-		 */
-		if (out.fd < 0) {
-			out.fd = ddop_open(out, out.name, O_WRONLY | OFLAGS,
-			    DEFFILEMODE);
-			out.flags |= NOREAD;
-		}
-		if (out.fd < 0) {
-			err(EXIT_FAILURE, "%s", out.name);
-			/* NOTREACHED */
-		}
-
-		/* Ensure out.fd is outside the stdio descriptor range */
-		redup_clean_fd(&out);
-	}
-
-	getfdtype(&out);
-
-	/*
-	 * Allocate space for the input and output buffers.  If not doing
-	 * record oriented I/O, only need a single buffer.
-	 */
-	if (!(ddflags & (C_BLOCK|C_UNBLOCK))) {
-		size_t dbsz = out.dbsz;
-		if (!(ddflags & C_BS))
-			dbsz += in.dbsz - 1;
-		if ((in.db = malloc(dbsz)) == NULL) {
-			err(EXIT_FAILURE, NULL);
-			/* NOTREACHED */
-		}
-		out.db = in.db;
-	} else if ((in.db =
-	    malloc((u_int)(MAX(in.dbsz, cbsz) + cbsz))) == NULL ||
-	    (out.db = malloc((u_int)(out.dbsz + cbsz))) == NULL) {
-		err(EXIT_FAILURE, NULL);
-		/* NOTREACHED */
-	}
-	in.dbp = in.db;
-	out.dbp = out.db;
-
-	/* Position the input/output streams. */
-	if (in.offset)
-		pos_in();
-	if (out.offset)
-		pos_out();
-
-	/*
-	 * Truncate the output file; ignore errors because it fails on some
-	 * kinds of output files, tapes, for example.
-	 */
-	if ((ddflags & (C_OF | C_SEEK | C_NOTRUNC)) == (C_OF | C_SEEK))
-		(void)ddop_ftruncate(out, out.fd, (off_t)out.offset * out.dbsz);
-
-	/*
-	 * If converting case at the same time as another conversion, build a
-	 * table that does both at once.  If just converting case, use the
-	 * built-in tables.
-	 */
-	if (ddflags & (C_LCASE|C_UCASE)) {
-#ifdef	NO_CONV
-		/* Should not get here, but just in case... */
-		errx(EXIT_FAILURE, "case conv and -DNO_CONV");
-		/* NOTREACHED */
-#else	/* NO_CONV */
-		u_int cnt;
-
-		if (ddflags & C_ASCII || ddflags & C_EBCDIC) {
-			if (ddflags & C_LCASE) {
-				for (cnt = 0; cnt < 256; ++cnt)
-					casetab[cnt] = tolower(ctab[cnt]);
-			} else {
-				for (cnt = 0; cnt < 256; ++cnt)
-					casetab[cnt] = toupper(ctab[cnt]);
-			}
-		} else {
-			if (ddflags & C_LCASE) {
-				for (cnt = 0; cnt < 256; ++cnt)
-					casetab[cnt] = tolower(cnt);
-			} else {
-				for (cnt = 0; cnt < 256; ++cnt)
-					casetab[cnt] = toupper(cnt);
-			}
-		}
-
-		ctab = casetab;
-#endif	/* NO_CONV */
-	}
-
-	(void)gettimeofday(&st.start, NULL);	/* Statistics timestamp. */
-}
-
-static void
-getfdtype(IO *io)
-{
-	struct mtget mt;
-	struct stat sb;
-
-	if (io->ops->op_fstat(io->fd, &sb)) {
-		err(EXIT_FAILURE, "%s", io->name);
-		/* NOTREACHED */
-	}
-	if (S_ISCHR(sb.st_mode))
-		io->flags |= io->ops->op_ioctl(io->fd, MTIOCGET, &mt)
-		    ? ISCHR : ISTAPE;
-	else if (io->ops->op_lseek(io->fd, (off_t)0, SEEK_CUR) == -1
-	    && errno == ESPIPE)
-		io->flags |= ISPIPE;		/* XXX fixed in 4.4BSD */
-}
-
-/*
- * Move the parameter file descriptor to a descriptor that is outside the
- * stdio descriptor range, if necessary.  This is required to avoid
- * accidentally outputting completion or error messages into the
- * output file that were intended for the tty.
- */
-static void
-redup_clean_fd(IO *io)
-{
-	int fd = io->fd;
-	int newfd;
-
-	if (fd != STDIN_FILENO && fd != STDOUT_FILENO &&
-	    fd != STDERR_FILENO)
-		/* File descriptor is ok, return immediately. */
-		return;
-
-	/*
-	 * 3 is the first descriptor greater than STD*_FILENO.  Any
-	 * free descriptor valued 3 or above is acceptable...
-	 */
-	newfd = io->ops->op_fcntl(fd, F_DUPFD, 3);
-	if (newfd < 0) {
-		err(EXIT_FAILURE, "dupfd IO");
-		/* NOTREACHED */
-	}
-
-	io->ops->op_close(fd);
-	io->fd = newfd;
-}
-
-static void
-dd_in(void)
-{
-	int flags;
-	int64_t n;
-
-	for (flags = ddflags;;) {
-		if (cpy_cnt && (st.in_full + st.in_part) >= cpy_cnt)
-			return;
-
-		/*
-		 * Clear the buffer first if doing "sync" on input.
-		 * If doing block operations use spaces.  This will
-		 * affect not only the C_NOERROR case, but also the
-		 * last partial input block which should be padded
-		 * with zero and not garbage.
-		 */
-		if (flags & C_SYNC) {
-			if (flags & (C_BLOCK|C_UNBLOCK))
-				(void)memset(in.dbp, ' ', in.dbsz);
-			else
-				(void)memset(in.dbp, 0, in.dbsz);
-		}
-
-		n = ddop_read(in, in.fd, in.dbp, in.dbsz);
-		if (n == 0) {
-			in.dbrcnt = 0;
-			return;
-		}
-
-		/* Read error. */
-		if (n < 0) {
-
-			/*
-			 * If noerror not specified, die.  POSIX requires that
-			 * the warning message be followed by an I/O display.
-			 */
-			if (!(flags & C_NOERROR)) {
-				err(EXIT_FAILURE, "%s", in.name);
-				/* NOTREACHED */
-			}
-			warn("%s", in.name);
-			summary();
-
-			/*
-			 * If it's not a tape drive or a pipe, seek past the
-			 * error.  If your OS doesn't do the right thing for
-			 * raw disks this section should be modified to re-read
-			 * in sector size chunks.
-			 */
-			if (!(in.flags & (ISPIPE|ISTAPE)) &&
-			    ddop_lseek(in, in.fd, (off_t)in.dbsz, SEEK_CUR))
-				warn("%s", in.name);
-
-			/* If sync not specified, omit block and continue. */
-			if (!(ddflags & C_SYNC))
-				continue;
-
-			/* Read errors count as full blocks. */
-			in.dbcnt += in.dbrcnt = in.dbsz;
-			++st.in_full;
-
-		/* Handle full input blocks. */
-		} else if ((uint64_t)n == in.dbsz) {
-			in.dbcnt += in.dbrcnt = n;
-			++st.in_full;
-
-		/* Handle partial input blocks. */
-		} else {
-			/* If sync, use the entire block. */
-			if (ddflags & C_SYNC)
-				in.dbcnt += in.dbrcnt = in.dbsz;
-			else
-				in.dbcnt += in.dbrcnt = n;
-			++st.in_part;
-		}
-
-		/*
-		 * POSIX states that if bs is set and no other conversions
-		 * than noerror, notrunc or sync are specified, the block
-		 * is output without buffering as it is read.
-		 */
-		if (ddflags & C_BS) {
-			out.dbcnt = in.dbcnt;
-			dd_out(1);
-			in.dbcnt = 0;
-			continue;
-		}
-
-		if (ddflags & C_SWAB) {
-			if ((n = in.dbrcnt) & 1) {
-				++st.swab;
-				--n;
-			}
-			swab(in.dbp, in.dbp, n);
-		}
-
-		in.dbp += in.dbrcnt;
-		(*cfunc)();
-	}
-}
-
-/*
- * Cleanup any remaining I/O and flush output.  If necessary, output file
- * is truncated.
- */
-static void
-dd_close(void)
-{
-
-	if (cfunc == def)
-		def_close();
-	else if (cfunc == block)
-		block_close();
-	else if (cfunc == unblock)
-		unblock_close();
-	if (ddflags & C_OSYNC && out.dbcnt < out.dbsz) {
-		(void)memset(out.dbp, 0, out.dbsz - out.dbcnt);
-		out.dbcnt = out.dbsz;
-	}
-	/* If there are pending sparse blocks, make sure
-	 * to write out the final block un-sparse
-	 */
-	if ((out.dbcnt == 0) && pending) {
-		memset(out.db, 0, out.dbsz);
-		out.dbcnt = out.dbsz;
-		out.dbp = out.db + out.dbcnt;
-		pending -= out.dbsz;
-	}
-	if (out.dbcnt)
-		dd_out(1);
-
-	/*
-	 * Reporting nfs write error may be deferred until next
-	 * write(2) or close(2) system call.  So, we need to do an
-	 * extra check.  If an output is stdout, the file structure
-	 * may be shared with other processes and close(2) just
-	 * decreases the reference count.
-	 */
-	if (out.fd == STDOUT_FILENO && ddop_fsync(out, out.fd) == -1
-	    && errno != EINVAL) {
-		err(EXIT_FAILURE, "fsync stdout");
-		/* NOTREACHED */
-	}
-	if (ddop_close(out, out.fd) == -1) {
-		err(EXIT_FAILURE, "close");
-		/* NOTREACHED */
-	}
-}
-
-void
-dd_out(int force)
-{
-	static int warned;
-	int64_t cnt, n, nw;
-	u_char *outp;
-
-	/*
-	 * Write one or more blocks out.  The common case is writing a full
-	 * output block in a single write; increment the full block stats.
-	 * Otherwise, we're into partial block writes.  If a partial write,
-	 * and it's a character device, just warn.  If a tape device, quit.
-	 *
-	 * The partial writes represent two cases.  1: Where the input block
-	 * was less than expected so the output block was less than expected.
-	 * 2: Where the input block was the right size but we were forced to
-	 * write the block in multiple chunks.  The original versions of dd(1)
-	 * never wrote a block in more than a single write, so the latter case
-	 * never happened.
-	 *
-	 * One special case is if we're forced to do the write -- in that case
-	 * we play games with the buffer size, and it's usually a partial write.
-	 */
-	outp = out.db;
-	for (n = force ? out.dbcnt : out.dbsz;; n = out.dbsz) {
-		for (cnt = n;; cnt -= nw) {
-
-			if (!force && ddflags & C_SPARSE) {
-				int sparse, i;
-				sparse = 1;	/* Is buffer sparse? */
-				for (i = 0; i < cnt; i++)
-					if (outp[i] != 0) {
-						sparse = 0;
-						break;
-					}
-				if (sparse) {
-					pending += cnt;
-					outp += cnt;
-					nw = 0;
-					break;
-				}
-			}
-			if (pending != 0) {
-				if (ddop_lseek(out,
-				    out.fd, pending, SEEK_CUR) == -1)
-					err(EXIT_FAILURE, "%s: seek error creating sparse file",
-					    out.name);
-			}
-			nw = bwrite(&out, outp, cnt);
-			if (nw <= 0) {
-				if (nw == 0)
-					errx(EXIT_FAILURE,
-						"%s: end of device", out.name);
-					/* NOTREACHED */
-				if (errno != EINTR)
-					err(EXIT_FAILURE, "%s", out.name);
-					/* NOTREACHED */
-				nw = 0;
-			}
-			if (pending) {
-				st.bytes += pending;
-				st.sparse += pending/out.dbsz;
-				st.out_full += pending/out.dbsz;
-				pending = 0;
-			}
-			outp += nw;
-			st.bytes += nw;
-			if (nw == n) {
-				if ((uint64_t)n != out.dbsz)
-					++st.out_part;
-				else
-					++st.out_full;
-				break;
-			}
-			++st.out_part;
-			if (nw == cnt)
-				break;
-			if (out.flags & ISCHR && !warned) {
-				warned = 1;
-				warnx("%s: short write on character device", out.name);
-			}
-			if (out.flags & ISTAPE)
-				errx(EXIT_FAILURE,
-					"%s: short write on tape device", out.name);
-				/* NOTREACHED */
-
-		}
-		if ((out.dbcnt -= n) < out.dbsz)
-			break;
-	}
-
-	/* Reassemble the output block. */
-	if (out.dbcnt)
-		(void)memmove(out.db, out.dbp - out.dbcnt, out.dbcnt);
-	out.dbp = out.db + out.dbcnt;
-
-	if (progress && (st.out_full + st.out_part) % progress == 0)
-		(void)write(STDERR_FILENO, ".", 1);
-}
-
-/*
- * A protected against SIGINFO write
- */
-ssize_t
-bwrite(IO *io, const void *buf, size_t len)
-{
-	sigset_t oset;
-	ssize_t rv;
-	int oerrno;
-
-	(void)sigprocmask(SIG_BLOCK, &infoset, &oset);
-	rv = io->ops->op_write(io->fd, buf, len);
-	oerrno = errno;
-	(void)sigprocmask(SIG_SETMASK, &oset, NULL);
-	errno = oerrno;
-	return (rv);
-}
diff --git a/toolbox/upstream-netbsd/bin/dd/dd.h b/toolbox/upstream-netbsd/bin/dd/dd.h
deleted file mode 100644
index b01c7b3..0000000
--- a/toolbox/upstream-netbsd/bin/dd/dd.h
+++ /dev/null
@@ -1,127 +0,0 @@
-/*	$NetBSD: dd.h,v 1.15 2011/02/04 19:42:12 pooka Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993, 1994
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Keith Muller of the University of California, San Diego and Lance
- * Visser of Convex Computer Corporation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)dd.h	8.3 (Berkeley) 4/2/94
- */
-
-#include <sys/stat.h>
-
-struct ddfops {
-	int (*op_init)(void);
-
-	int (*op_open)(const char *, int, ...);
-	int (*op_close)(int);
-
-	int (*op_fcntl)(int, int, ...);
-#ifdef __ANDROID__
-	int (*op_ioctl)(int, int, ...);
-#else
-	int (*op_ioctl)(int, unsigned long, ...);
-#endif
-
-	int (*op_fstat)(int, struct stat *);
-	int (*op_fsync)(int);
-	int (*op_ftruncate)(int, off_t);
-
-	off_t (*op_lseek)(int, off_t, int);
-
-	ssize_t (*op_read)(int, void *, size_t);
-	ssize_t (*op_write)(int, const void *, size_t);
-};
-
-#define ddop_open(dir, a1, a2, ...)	dir.ops->op_open(a1, a2, __VA_ARGS__)
-#define ddop_close(dir, a1)		dir.ops->op_close(a1)
-#define ddop_fcntl(dir, a1, a2, ...)	dir.ops->op_fcntl(a1, a2, __VA_ARGS__)
-#define ddop_ioctl(dir, a1, a2, ...)	dir.ops->op_ioctl(a1, a2, __VA_ARGS__)
-#define ddop_fsync(dir, a1)		dir.ops->op_fsync(a1)
-#define ddop_ftruncate(dir, a1, a2)	dir.ops->op_ftruncate(a1, a2)
-#define ddop_lseek(dir, a1, a2, a3)	dir.ops->op_lseek(a1, a2, a3)
-#define ddop_read(dir, a1, a2, a3)	dir.ops->op_read(a1, a2, a3)
-#define ddop_write(dir, a1, a2, a3)	dir.ops->op_write(a1, a2, a3)
-
-/* Input/output stream state. */
-typedef struct {
-	u_char		*db;		/* buffer address */
-	u_char		*dbp;		/* current buffer I/O address */
-	uint64_t	dbcnt;		/* current buffer byte count */
-	int64_t		dbrcnt;		/* last read byte count */
-	uint64_t	dbsz;		/* buffer size */
-
-#define	ISCHR		0x01		/* character device (warn on short) */
-#define	ISPIPE		0x02		/* pipe (not truncatable) */
-#define	ISTAPE		0x04		/* tape (not seekable) */
-#define	NOREAD		0x08		/* not readable */
-	u_int		flags;
-
-	const char  	*name;		/* name */
-	int		fd;		/* file descriptor */
-	uint64_t	offset;		/* # of blocks to skip */
-	struct ddfops	const *ops;	/* ops to use with fd */
-} IO;
-
-typedef struct {
-	uint64_t	in_full;	/* # of full input blocks */
-	uint64_t	in_part;	/* # of partial input blocks */
-	uint64_t	out_full;	/* # of full output blocks */
-	uint64_t	out_part;	/* # of partial output blocks */
-	uint64_t	trunc;		/* # of truncated records */
-	uint64_t	swab;		/* # of odd-length swab blocks */
-	uint64_t	sparse;		/* # of sparse output blocks */
-	uint64_t	bytes;		/* # of bytes written */
-	struct timeval	start;		/* start time of dd */
-} STAT;
-
-/* Flags (in ddflags). */
-#define	C_ASCII		0x00001
-#define	C_BLOCK		0x00002
-#define	C_BS		0x00004
-#define	C_CBS		0x00008
-#define	C_COUNT		0x00010
-#define	C_EBCDIC	0x00020
-#define	C_FILES		0x00040
-#define	C_IBS		0x00080
-#define	C_IF		0x00100
-#define	C_LCASE		0x00200
-#define	C_NOERROR	0x00400
-#define	C_NOTRUNC	0x00800
-#define	C_OBS		0x01000
-#define	C_OF		0x02000
-#define	C_SEEK		0x04000
-#define	C_SKIP		0x08000
-#define	C_SWAB		0x10000
-#define	C_SYNC		0x20000
-#define	C_UCASE		0x40000
-#define	C_UNBLOCK	0x80000
-#define	C_OSYNC		0x100000
-#define	C_SPARSE	0x200000
diff --git a/toolbox/upstream-netbsd/bin/dd/dd_hostops.c b/toolbox/upstream-netbsd/bin/dd/dd_hostops.c
deleted file mode 100644
index d6e7a89..0000000
--- a/toolbox/upstream-netbsd/bin/dd/dd_hostops.c
+++ /dev/null
@@ -1,53 +0,0 @@
-/*      $NetBSD: dd_hostops.c,v 1.1 2011/02/04 19:42:12 pooka Exp $	*/
-
-/*-
- * Copyright (c) 2010 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-__RCSID("$NetBSD: dd_hostops.c,v 1.1 2011/02/04 19:42:12 pooka Exp $");
-#endif /* !lint */
-
-#include <sys/types.h>
-#include <sys/ioctl.h>
-
-#include <fcntl.h>
-#include <unistd.h>
-
-#include "dd.h"
-
-const struct ddfops ddfops_prog = {
-	.op_open = open,
-	.op_close = close,
-	.op_fcntl = fcntl,
-	.op_ioctl = ioctl,
-	.op_fstat = fstat,
-	.op_fsync = fsync,
-	.op_ftruncate = ftruncate,
-	.op_lseek = lseek,
-	.op_read = read,
-	.op_write = write,
-};
diff --git a/toolbox/upstream-netbsd/bin/dd/extern.h b/toolbox/upstream-netbsd/bin/dd/extern.h
deleted file mode 100644
index 9c59021..0000000
--- a/toolbox/upstream-netbsd/bin/dd/extern.h
+++ /dev/null
@@ -1,82 +0,0 @@
-/*	$NetBSD: extern.h,v 1.22 2011/11/07 22:24:23 jym Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993, 1994
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Keith Muller of the University of California, San Diego and Lance
- * Visser of Convex Computer Corporation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)extern.h	8.3 (Berkeley) 4/2/94
- */
-
-#include <sys/cdefs.h>
-
-#ifdef NO_CONV
-__dead void block(void);
-__dead void block_close(void);
-__dead void unblock(void);
-__dead void unblock_close(void);
-#else
-void block(void);
-void block_close(void);
-void unblock(void);
-void unblock_close(void);
-#endif
-
-#ifndef NO_MSGFMT
-int dd_write_msg(const char *, int);
-#endif
-
-void dd_out(int);
-void def(void);
-void def_close(void);
-void jcl(char **);
-void pos_in(void);
-void pos_out(void);
-void summary(void);
-void summaryx(int);
-__dead void terminate(int);
-void unblock(void);
-void unblock_close(void);
-ssize_t bwrite(IO *, const void *, size_t);
-
-extern IO		in, out;
-extern STAT		st;
-extern void		(*cfunc)(void);
-extern uint64_t		cpy_cnt;
-extern uint64_t		cbsz;
-extern u_int		ddflags;
-extern u_int		files_cnt;
-extern uint64_t		progress;
-extern const u_char	*ctab;
-extern const u_char	a2e_32V[], a2e_POSIX[];
-extern const u_char	e2a_32V[], e2a_POSIX[];
-extern const u_char	a2ibm_32V[], a2ibm_POSIX[];
-extern u_char		casetab[];
-extern const char	*msgfmt;
diff --git a/toolbox/upstream-netbsd/bin/dd/misc.c b/toolbox/upstream-netbsd/bin/dd/misc.c
deleted file mode 100644
index 0fac98b..0000000
--- a/toolbox/upstream-netbsd/bin/dd/misc.c
+++ /dev/null
@@ -1,342 +0,0 @@
-/*	$NetBSD: misc.c,v 1.23 2011/11/07 22:24:23 jym Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993, 1994
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Keith Muller of the University of California, San Diego and Lance
- * Visser of Convex Computer Corporation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)misc.c	8.3 (Berkeley) 4/2/94";
-#else
-__RCSID("$NetBSD: misc.c,v 1.23 2011/11/07 22:24:23 jym Exp $");
-#endif
-#endif /* not lint */
-
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/time.h>
-
-#include <err.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <util.h>
-#include <inttypes.h>
-
-#include "dd.h"
-#include "extern.h"
-
-#define	tv2mS(tv) ((tv).tv_sec * 1000LL + ((tv).tv_usec + 500) / 1000)
-
-static void posix_summary(void);
-#ifndef NO_MSGFMT
-static void custom_summary(void);
-static void human_summary(void);
-static void quiet_summary(void);
-
-static void buffer_write(const char *, size_t, int);
-#endif /* NO_MSGFMT */
-
-void
-summary(void)
-{
-
-	if (progress)
-		(void)write(STDERR_FILENO, "\n", 1);
-
-#ifdef NO_MSGFMT
-	return posix_summary();
-#else /* NO_MSGFMT */
-	if (strncmp(msgfmt, "human", sizeof("human")) == 0)
-		return human_summary();
-
-	if (strncmp(msgfmt, "posix", sizeof("posix")) == 0)
-		return posix_summary();
-
-	if (strncmp(msgfmt, "quiet", sizeof("quiet")) == 0)
-		return quiet_summary();
-
-	return custom_summary();
-#endif /* NO_MSGFMT */
-}
-
-static void
-posix_summary(void)
-{
-	char buf[100];
-	int64_t mS;
-	struct timeval tv;
-
-	if (progress)
-		(void)write(STDERR_FILENO, "\n", 1);
-
-	(void)gettimeofday(&tv, NULL);
-	mS = tv2mS(tv) - tv2mS(st.start);
-	if (mS == 0)
-		mS = 1;
-
-	/* Use snprintf(3) so that we don't reenter stdio(3). */
-	(void)snprintf(buf, sizeof(buf),
-	    "%llu+%llu records in\n%llu+%llu records out\n",
-	    (unsigned long long)st.in_full,  (unsigned long long)st.in_part,
-	    (unsigned long long)st.out_full, (unsigned long long)st.out_part);
-	(void)write(STDERR_FILENO, buf, strlen(buf));
-	if (st.swab) {
-		(void)snprintf(buf, sizeof(buf), "%llu odd length swab %s\n",
-		    (unsigned long long)st.swab,
-		    (st.swab == 1) ? "block" : "blocks");
-		(void)write(STDERR_FILENO, buf, strlen(buf));
-	}
-	if (st.trunc) {
-		(void)snprintf(buf, sizeof(buf), "%llu truncated %s\n",
-		    (unsigned long long)st.trunc,
-		    (st.trunc == 1) ? "block" : "blocks");
-		(void)write(STDERR_FILENO, buf, strlen(buf));
-	}
-	if (st.sparse) {
-		(void)snprintf(buf, sizeof(buf), "%llu sparse output %s\n",
-		    (unsigned long long)st.sparse,
-		    (st.sparse == 1) ? "block" : "blocks");
-		(void)write(STDERR_FILENO, buf, strlen(buf));
-	}
-	(void)snprintf(buf, sizeof(buf),
-	    "%llu bytes transferred in %lu.%03d secs (%llu bytes/sec)\n",
-	    (unsigned long long) st.bytes,
-	    (long) (mS / 1000),
-	    (int) (mS % 1000),
-	    (unsigned long long) (st.bytes * 1000LL / mS));
-	(void)write(STDERR_FILENO, buf, strlen(buf));
-}
-
-/* ARGSUSED */
-void
-summaryx(int notused)
-{
-
-	summary();
-}
-
-/* ARGSUSED */
-void
-terminate(int signo)
-{
-
-	summary();
-	(void)raise_default_signal(signo);
-	_exit(127);
-}
-
-#ifndef NO_MSGFMT
-/*
- * Buffer write(2) calls
- */
-static void
-buffer_write(const char *str, size_t size, int flush)
-{
-	static char wbuf[128];
-	static size_t cnt = 0; /* Internal counter to allow wbuf to wrap */
-	
-	unsigned int i;
-
-	for (i = 0; i < size; i++) {
-		if (str != NULL) {
-			wbuf[cnt++] = str[i];
-		}
-		if (cnt >= sizeof(wbuf)) {
-			(void)write(STDERR_FILENO, wbuf, cnt);
-			cnt = 0;
-		}
-	}
-
-	if (flush != 0) {
-		(void)write(STDERR_FILENO, wbuf, cnt);
-		cnt = 0;
-	}
-}
-
-/*
- * Write summary to stderr according to format 'fmt'. If 'enable' is 0, it
- * will not attempt to write anything. Can be used to validate the
- * correctness of the 'fmt' string.
- */
-int
-dd_write_msg(const char *fmt, int enable)
-{
-	char hbuf[7], nbuf[32];
-	const char *ptr;
-	int64_t mS;
-	struct timeval tv;
-
-	(void)gettimeofday(&tv, NULL);
-	mS = tv2mS(tv) - tv2mS(st.start);
-	if (mS == 0)
-		mS = 1;
-
-#define ADDC(c) do { if (enable != 0) buffer_write(&c, 1, 0); } \
-	while (/*CONSTCOND*/0)
-#define ADDS(p) do { if (enable != 0) buffer_write(p, strlen(p), 0); } \
-	while (/*CONSTCOND*/0)
-
-	for (ptr = fmt; *ptr; ptr++) {
-		if (*ptr != '%') {
-			ADDC(*ptr);
-			continue;
-		}
-
- 		switch (*++ptr) {
-		case 'b':
-			(void)snprintf(nbuf, sizeof(nbuf), "%llu",
-			    (unsigned long long)st.bytes);
-			ADDS(nbuf);
-			break;
-		case 'B':
-			if (humanize_number(hbuf, sizeof(hbuf),
-			    st.bytes, "B",
-			    HN_AUTOSCALE, HN_DECIMAL) == -1)
-				warnx("humanize_number (bytes transferred)");
-			ADDS(hbuf);
-			break;
-		case 'e':
-			(void)snprintf(nbuf, sizeof(nbuf), "%llu",
-			    (unsigned long long) (st.bytes * 1000LL / mS));
-			ADDS(nbuf);
-			break;
-		case 'E':
-			if (humanize_number(hbuf, sizeof(hbuf),
-			    st.bytes * 1000LL / mS, "B",
-			    HN_AUTOSCALE, HN_DECIMAL) == -1)
-				warnx("humanize_number (bytes per second)");
-			ADDS(hbuf); ADDS("/sec");
-			break;
-		case 'i':
-			(void)snprintf(nbuf, sizeof(nbuf), "%llu",
-			    (unsigned long long)st.in_part);
-			ADDS(nbuf);
-			break;
-		case 'I':
-			(void)snprintf(nbuf, sizeof(nbuf), "%llu",
-			    (unsigned long long)st.in_full);
-			ADDS(nbuf);
-			break;
-		case 'o':
-			(void)snprintf(nbuf, sizeof(nbuf), "%llu",
-			    (unsigned long long)st.out_part);
-			ADDS(nbuf);
-			break;
-		case 'O':
-			(void)snprintf(nbuf, sizeof(nbuf), "%llu",
-			    (unsigned long long)st.out_full);
-			ADDS(nbuf);
-			break;
-		case 's':
-			(void)snprintf(nbuf, sizeof(nbuf), "%li.%03d",
-			    (long) (mS / 1000), (int) (mS % 1000));
-			ADDS(nbuf);
-			break;
-		case 'p':
-			(void)snprintf(nbuf, sizeof(nbuf), "%llu",
-			    (unsigned long long)st.sparse);
-			ADDS(nbuf);
-			break;
-		case 't':
-			(void)snprintf(nbuf, sizeof(nbuf), "%llu",
-			    (unsigned long long)st.trunc);
-			ADDS(nbuf);
-			break;
-		case 'w':
-			(void)snprintf(nbuf, sizeof(nbuf), "%llu",
-			    (unsigned long long)st.swab);
-			ADDS(nbuf);
-			break;
-		case 'P':
-			ADDS("block");
-			if (st.sparse != 1) ADDS("s");
-			break;
-		case 'T':
-			ADDS("block");
-			if (st.trunc != 1) ADDS("s");
-			break;
-		case 'W':
-			ADDS("block");
-			if (st.swab != 1) ADDS("s");
-			break;
-		case '%':
-			ADDC(*ptr);
-			break;
-		default:
-			if (*ptr == '\0')
-				goto done;
-			errx(EXIT_FAILURE, "unknown specifier '%c' in "
-			    "msgfmt string", *ptr);
-			/* NOTREACHED */
-		}
-	}
-
-done:
-	/* flush buffer */
-	buffer_write(NULL, 0, 1);
-	return 0;
-}
-
-static void
-custom_summary(void)
-{
-
-	dd_write_msg(msgfmt, 1);
-}
-
-static void
-human_summary(void)
-{
-	(void)dd_write_msg("%I+%i records in\n%O+%o records out\n", 1);
-	if (st.swab) {
-		(void)dd_write_msg("%w odd length swab %W\n", 1);
-	}
-	if (st.trunc) {
-		(void)dd_write_msg("%t truncated %T\n", 1);
-	}
-	if (st.sparse) {
-		(void)dd_write_msg("%p sparse output %P\n", 1);
-	}
-	(void)dd_write_msg("%b bytes (%B) transferred in %s secs "
-	    "(%e bytes/sec - %E)\n", 1);
-}
-
-static void
-quiet_summary(void)
-{
-
-	/* stay quiet */
-}
-#endif /* NO_MSGFMT */
diff --git a/toolbox/upstream-netbsd/bin/dd/position.c b/toolbox/upstream-netbsd/bin/dd/position.c
deleted file mode 100644
index 36dd580..0000000
--- a/toolbox/upstream-netbsd/bin/dd/position.c
+++ /dev/null
@@ -1,185 +0,0 @@
-/*	$NetBSD: position.c,v 1.18 2010/11/22 21:04:28 pooka Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993, 1994
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Keith Muller of the University of California, San Diego and Lance
- * Visser of Convex Computer Corporation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)position.c	8.3 (Berkeley) 4/2/94";
-#else
-__RCSID("$NetBSD: position.c,v 1.18 2010/11/22 21:04:28 pooka Exp $");
-#endif
-#endif /* not lint */
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <sys/mtio.h>
-#include <sys/time.h>
-
-#include <err.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "dd.h"
-#include "extern.h"
-
-/*
- * Position input/output data streams before starting the copy.  Device type
- * dependent.  Seekable devices use lseek, and the rest position by reading.
- * Seeking past the end of file can cause null blocks to be written to the
- * output.
- */
-void
-pos_in(void)
-{
-	int bcnt, cnt, nr, warned;
-
-	/* If not a pipe or tape device, try to seek on it. */
-	if (!(in.flags & (ISPIPE|ISTAPE))) {
-		if (ddop_lseek(in, in.fd,
-		    (off_t)in.offset * (off_t)in.dbsz, SEEK_CUR) == -1) {
-			err(EXIT_FAILURE, "%s", in.name);
-			/* NOTREACHED */
-		}
-		return;
-		/* NOTREACHED */
-	}
-
-	/*
-	 * Read the data.  If a pipe, read until satisfy the number of bytes
-	 * being skipped.  No differentiation for reading complete and partial
-	 * blocks for other devices.
-	 */
-	for (bcnt = in.dbsz, cnt = in.offset, warned = 0; cnt;) {
-		if ((nr = ddop_read(in, in.fd, in.db, bcnt)) > 0) {
-			if (in.flags & ISPIPE) {
-				if (!(bcnt -= nr)) {
-					bcnt = in.dbsz;
-					--cnt;
-				}
-			} else
-				--cnt;
-			continue;
-		}
-
-		if (nr == 0) {
-			if (files_cnt > 1) {
-				--files_cnt;
-				continue;
-			}
-			errx(EXIT_FAILURE, "skip reached end of input");
-			/* NOTREACHED */
-		}
-
-		/*
-		 * Input error -- either EOF with no more files, or I/O error.
-		 * If noerror not set die.  POSIX requires that the warning
-		 * message be followed by an I/O display.
-		 */
-		if (ddflags & C_NOERROR) {
-			if (!warned) {
-
-				warn("%s", in.name);
-				warned = 1;
-				summary();
-			}
-			continue;
-		}
-		err(EXIT_FAILURE, "%s", in.name);
-		/* NOTREACHED */
-	}
-}
-
-void
-pos_out(void)
-{
-	struct mtop t_op;
-	int n;
-	uint64_t cnt;
-
-	/*
-	 * If not a tape, try seeking on the file.  Seeking on a pipe is
-	 * going to fail, but don't protect the user -- they shouldn't
-	 * have specified the seek operand.
-	 */
-	if (!(out.flags & ISTAPE)) {
-		if (ddop_lseek(out, out.fd,
-		    (off_t)out.offset * (off_t)out.dbsz, SEEK_SET) == -1)
-			err(EXIT_FAILURE, "%s", out.name);
-			/* NOTREACHED */
-		return;
-	}
-
-	/* If no read access, try using mtio. */
-	if (out.flags & NOREAD) {
-		t_op.mt_op = MTFSR;
-		t_op.mt_count = out.offset;
-
-		if (ddop_ioctl(out, out.fd, MTIOCTOP, &t_op) < 0)
-			err(EXIT_FAILURE, "%s", out.name);
-			/* NOTREACHED */
-		return;
-	}
-
-	/* Read it. */
-	for (cnt = 0; cnt < out.offset; ++cnt) {
-		if ((n = ddop_read(out, out.fd, out.db, out.dbsz)) > 0)
-			continue;
-
-		if (n < 0)
-			err(EXIT_FAILURE, "%s", out.name);
-			/* NOTREACHED */
-
-		/*
-		 * If reach EOF, fill with NUL characters; first, back up over
-		 * the EOF mark.  Note, cnt has not yet been incremented, so
-		 * the EOF read does not count as a seek'd block.
-		 */
-		t_op.mt_op = MTBSR;
-		t_op.mt_count = 1;
-		if (ddop_ioctl(out, out.fd, MTIOCTOP, &t_op) == -1)
-			err(EXIT_FAILURE, "%s", out.name);
-			/* NOTREACHED */
-
-		while (cnt++ < out.offset)
-			if ((uint64_t)(n = bwrite(&out,
-			    out.db, out.dbsz)) != out.dbsz)
-				err(EXIT_FAILURE, "%s", out.name);
-				/* NOTREACHED */
-		break;
-	}
-}
diff --git a/toolbox/upstream-netbsd/include/namespace.h b/toolbox/upstream-netbsd/include/namespace.h
deleted file mode 100644
index e69de29..0000000
--- a/toolbox/upstream-netbsd/include/namespace.h
+++ /dev/null
diff --git a/toolbox/upstream-netbsd/include/sys/extattr.h b/toolbox/upstream-netbsd/include/sys/extattr.h
deleted file mode 100644
index e69de29..0000000
--- a/toolbox/upstream-netbsd/include/sys/extattr.h
+++ /dev/null
diff --git a/toolbox/upstream-netbsd/include/util.h b/toolbox/upstream-netbsd/include/util.h
deleted file mode 100644
index e69de29..0000000
--- a/toolbox/upstream-netbsd/include/util.h
+++ /dev/null
diff --git a/toolbox/upstream-netbsd/lib/libc/gen/getbsize.c b/toolbox/upstream-netbsd/lib/libc/gen/getbsize.c
deleted file mode 100644
index a9ce2c1..0000000
--- a/toolbox/upstream-netbsd/lib/libc/gen/getbsize.c
+++ /dev/null
@@ -1,118 +0,0 @@
-/*	$NetBSD: getbsize.c,v 1.17 2012/06/25 22:32:43 abs Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#if defined(LIBC_SCCS) && !defined(lint)
-#if 0
-static char sccsid[] = "@(#)getbsize.c	8.1 (Berkeley) 6/4/93";
-#else
-__RCSID("$NetBSD: getbsize.c,v 1.17 2012/06/25 22:32:43 abs Exp $");
-#endif
-#endif /* not lint */
-
-#include "namespace.h"
-
-#include <assert.h>
-#include <err.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#ifdef __weak_alias
-__weak_alias(getbsize,_getbsize)
-#endif
-
-char *
-getbsize(int *headerlenp, long *blocksizep)
-{
-	static char header[20];
-	long n, max, mul, blocksize;
-	char *ep, *p;
-	const char *form;
-
-#define	KB	(1024L)
-#define	MB	(1024L * 1024L)
-#define	GB	(1024L * 1024L * 1024L)
-#define	MAXB	GB		/* No tera, peta, nor exa. */
-	form = "";
-	if ((p = getenv("BLOCKSIZE")) != NULL && *p != '\0') {
-		if ((n = strtol(p, &ep, 10)) < 0)
-			goto underflow;
-		if (n == 0)
-			n = 1;
-		if (*ep && ep[1])
-			goto fmterr;
-		switch (*ep) {
-		case 'G': case 'g':
-			form = "G";
-			max = MAXB / GB;
-			mul = GB;
-			break;
-		case 'K': case 'k':
-			form = "K";
-			max = MAXB / KB;
-			mul = KB;
-			break;
-		case 'M': case 'm':
-			form = "M";
-			max = MAXB / MB;
-			mul = MB;
-			break;
-		case '\0':
-			max = MAXB;
-			mul = 1;
-			break;
-		default:
-fmterr:			warnx("%s: unknown blocksize", p);
-			n = 512;
-			mul = 1;
-			max = 0;
-			break;
-		}
-		if (n > max) {
-			warnx("maximum blocksize is %ldG", MAXB / GB);
-			n = max;
-		}
-		if ((blocksize = n * mul) < 512) {
-underflow:		warnx("%s: minimum blocksize is 512", p);
-			form = "";
-			blocksize = n = 512;
-		}
-	} else
-		blocksize = n = 512;
-
-	if (headerlenp)
-		*headerlenp =
-		    snprintf(header, sizeof(header), "%ld%s-blocks", n, form);
-	if (blocksizep)
-		*blocksizep = blocksize;
-	return (header);
-}
diff --git a/toolbox/upstream-netbsd/lib/libc/gen/humanize_number.c b/toolbox/upstream-netbsd/lib/libc/gen/humanize_number.c
deleted file mode 100644
index 533560f..0000000
--- a/toolbox/upstream-netbsd/lib/libc/gen/humanize_number.c
+++ /dev/null
@@ -1,161 +0,0 @@
-/*	$NetBSD: humanize_number.c,v 1.16 2012/03/17 20:01:14 christos Exp $	*/
-
-/*
- * Copyright (c) 1997, 1998, 1999, 2002 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
- * NASA Ames Research Center, by Luke Mewburn and by Tomas Svensson.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#if defined(LIBC_SCCS) && !defined(lint)
-__RCSID("$NetBSD: humanize_number.c,v 1.16 2012/03/17 20:01:14 christos Exp $");
-#endif /* LIBC_SCCS and not lint */
-
-#include "namespace.h"
-#include <assert.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <locale.h>
-
-int
-humanize_number(char *buf, size_t len, int64_t bytes,
-    const char *suffix, int scale, int flags)
-{
-	const char *prefixes, *sep;
-	int	b, r, s1, s2, sign;
-	int64_t	divisor, max, post = 1;
-	size_t	i, baselen, maxscale;
-
-	_DIAGASSERT(buf != NULL);
-	_DIAGASSERT(suffix != NULL);
-	_DIAGASSERT(scale >= 0);
-
-	if (flags & HN_DIVISOR_1000) {
-		/* SI for decimal multiplies */
-		divisor = 1000;
-		if (flags & HN_B)
-			prefixes = "B\0k\0M\0G\0T\0P\0E";
-		else
-			prefixes = "\0\0k\0M\0G\0T\0P\0E";
-	} else {
-		/*
-		 * binary multiplies
-		 * XXX IEC 60027-2 recommends Ki, Mi, Gi...
-		 */
-		divisor = 1024;
-		if (flags & HN_B)
-			prefixes = "B\0K\0M\0G\0T\0P\0E";
-		else
-			prefixes = "\0\0K\0M\0G\0T\0P\0E";
-	}
-
-#define	SCALE2PREFIX(scale)	(&prefixes[(scale) << 1])
-	maxscale = 7;
-
-	if ((size_t)scale >= maxscale &&
-	    (scale & (HN_AUTOSCALE | HN_GETSCALE)) == 0)
-		return (-1);
-
-	if (buf == NULL || suffix == NULL)
-		return (-1);
-
-	if (len > 0)
-		buf[0] = '\0';
-	if (bytes < 0) {
-		sign = -1;
-		baselen = 3;		/* sign, digit, prefix */
-		if (-bytes < INT64_MAX / 100)
-			bytes *= -100;
-		else {
-			bytes = -bytes;
-			post = 100;
-			baselen += 2;
-		}
-	} else {
-		sign = 1;
-		baselen = 2;		/* digit, prefix */
-		if (bytes < INT64_MAX / 100)
-			bytes *= 100;
-		else {
-			post = 100;
-			baselen += 2;
-		}
-	}
-	if (flags & HN_NOSPACE)
-		sep = "";
-	else {
-		sep = " ";
-		baselen++;
-	}
-	baselen += strlen(suffix);
-
-	/* Check if enough room for `x y' + suffix + `\0' */
-	if (len < baselen + 1)
-		return (-1);
-
-	if (scale & (HN_AUTOSCALE | HN_GETSCALE)) {
-		/* See if there is additional columns can be used. */
-		for (max = 100, i = len - baselen; i-- > 0;)
-			max *= 10;
-
-		/*
-		 * Divide the number until it fits the given column.
-		 * If there will be an overflow by the rounding below,
-		 * divide once more.
-		 */
-		for (i = 0; bytes >= max - 50 && i < maxscale; i++)
-			bytes /= divisor;
-
-		if (scale & HN_GETSCALE) {
-			_DIAGASSERT(__type_fit(int, i));
-			return (int)i;
-		}
-	} else
-		for (i = 0; i < (size_t)scale && i < maxscale; i++)
-			bytes /= divisor;
-	bytes *= post;
-
-	/* If a value <= 9.9 after rounding and ... */
-	if (bytes < 995 && i > 0 && flags & HN_DECIMAL) {
-		/* baselen + \0 + .N */
-		if (len < baselen + 1 + 2)
-			return (-1);
-		b = ((int)bytes + 5) / 10;
-		s1 = b / 10;
-		s2 = b % 10;
-		r = snprintf(buf, len, "%d%s%d%s%s%s",
-		    sign * s1, localeconv()->decimal_point, s2,
-		    sep, SCALE2PREFIX(i), suffix);
-	} else
-		r = snprintf(buf, len, "%" PRId64 "%s%s%s",
-		    sign * ((bytes + 50) / 100),
-		    sep, SCALE2PREFIX(i), suffix);
-
-	return (r);
-}
diff --git a/toolbox/upstream-netbsd/lib/libc/stdlib/strsuftoll.c b/toolbox/upstream-netbsd/lib/libc/stdlib/strsuftoll.c
deleted file mode 100644
index 80fc52f..0000000
--- a/toolbox/upstream-netbsd/lib/libc/stdlib/strsuftoll.c
+++ /dev/null
@@ -1,249 +0,0 @@
-/*	$NetBSD: strsuftoll.c,v 1.9 2011/10/22 22:08:47 christos Exp $	*/
-/*-
- * Copyright (c) 2001-2002,2004 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by Luke Mewburn.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-/*-
- * Copyright (c) 1991, 1993, 1994
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Keith Muller of the University of California, San Diego and Lance
- * Visser of Convex Computer Corporation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#if HAVE_NBTOOL_CONFIG_H
-#include "nbtool_config.h"
-#endif
-
-#include <sys/cdefs.h>
-
-#if defined(LIBC_SCCS) && !defined(lint)
-__RCSID("$NetBSD: strsuftoll.c,v 1.9 2011/10/22 22:08:47 christos Exp $");
-#endif /* LIBC_SCCS and not lint */
-
-#ifdef _LIBC
-#include "namespace.h"
-#endif
-
-#if !HAVE_STRSUFTOLL
-
-#include <sys/types.h>
-#include <sys/time.h>
-
-#include <assert.h>
-#include <ctype.h>
-#include <err.h>
-#include <errno.h>
-#include <limits.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#ifdef _LIBC
-# ifdef __weak_alias
-__weak_alias(strsuftoll, _strsuftoll)
-__weak_alias(strsuftollx, _strsuftollx)
-# endif
-#endif /* LIBC */
-
-/*
- * Convert an expression of the following forms to a (u)int64_t.
- * 	1) A positive decimal number.
- *	2) A positive decimal number followed by a b (mult by 512).
- *	3) A positive decimal number followed by a k (mult by 1024).
- *	4) A positive decimal number followed by a m (mult by 1048576).
- *	5) A positive decimal number followed by a g (mult by 1073741824).
- *	6) A positive decimal number followed by a t (mult by 1099511627776).
- *	7) A positive decimal number followed by a w (mult by sizeof int)
- *	8) Two or more positive decimal numbers (with/without k,b or w).
- *	   separated by x (also * for backwards compatibility), specifying
- *	   the product of the indicated values.
- * Returns the result upon successful conversion, or exits with an
- * appropriate error.
- * 
- */
-/* LONGLONG */
-long long
-strsuftoll(const char *desc, const char *val,
-    long long min, long long max)
-{
-	long long result;
-	char	errbuf[100];
-
-	result = strsuftollx(desc, val, min, max, errbuf, sizeof(errbuf));
-	if (*errbuf != '\0')
-		errx(EXIT_FAILURE, "%s", errbuf);
-	return result;
-}
-
-/*
- * As strsuftoll(), but returns the error message into the provided buffer
- * rather than exiting with it.
- */
-/* LONGLONG */
-static long long
-__strsuftollx(const char *desc, const char *val,
-    long long min, long long max, char *ebuf, size_t ebuflen, size_t depth)
-{
-	long long num, t;
-	char	*expr;
-
-	_DIAGASSERT(desc != NULL);
-	_DIAGASSERT(val != NULL);
-	_DIAGASSERT(ebuf != NULL);
-
-	if (depth > 16) {
-		snprintf(ebuf, ebuflen, "%s: Recursion limit exceeded", desc);
-		return 0;
-	}
-
-	while (isspace((unsigned char)*val))	/* Skip leading space */
-		val++;
-
-	errno = 0;
-	num = strtoll(val, &expr, 10);
-	if (errno == ERANGE)
-		goto erange;			/* Overflow */
-
-	if (expr == val)			/* No digits */
-		goto badnum;
-
-	switch (*expr) {
-	case 'b':
-		t = num;
-		num *= 512;			/* 1 block */
-		if (t > num)
-			goto erange;
-		++expr;
-		break;
-	case 'k':
-		t = num;
-		num *= 1024;			/* 1 kibibyte */
-		if (t > num)
-			goto erange;
-		++expr;
-		break;
-	case 'm':
-		t = num;
-		num *= 1048576;			/* 1 mebibyte */
-		if (t > num)
-			goto erange;
-		++expr;
-		break;
-	case 'g':
-		t = num;
-		num *= 1073741824;		/* 1 gibibyte */
-		if (t > num)
-			goto erange;
-		++expr;
-		break;
-	case 't':
-		t = num;
-		num *= 1099511627776LL;		/* 1 tebibyte */
-		if (t > num)
-			goto erange;
-		++expr;
-		break;
-	case 'w':
-		t = num;
-		num *= sizeof(int);		/* 1 word */
-		if (t > num)
-			goto erange;
-		++expr;
-		break;
-	}
-
-	switch (*expr) {
-	case '\0':
-		break;
-	case '*':				/* Backward compatible */
-	case 'x':
-		t = num;
-		num *= __strsuftollx(desc, expr + 1, min, max, ebuf, ebuflen,
-			depth + 1);
-		if (*ebuf != '\0')
-			return 0;
-		if (t > num) {
- erange:	 	
-			errno = ERANGE;
-			snprintf(ebuf, ebuflen, "%s: %s", desc, strerror(errno));
-			return 0;
-		}
-		break;
-	default:
- badnum:
-		snprintf(ebuf, ebuflen, "%s `%s': illegal number", desc, val);
-		return 0;
-	}
-	if (num < min) {
-		/* LONGLONG */
-		snprintf(ebuf, ebuflen, "%s %lld is less than %lld.",
-		    desc, (long long)num, (long long)min);
-		return 0;
-	}
-	if (num > max) {
-		/* LONGLONG */
-		snprintf(ebuf, ebuflen, "%s %lld is greater than %lld.",
-		    desc, (long long)num, (long long)max);
-		return 0;
-	}
-	*ebuf = '\0';
-	return num;
-}
-
-long long
-strsuftollx(const char *desc, const char *val,
-    long long min, long long max, char *ebuf, size_t ebuflen)
-{
-	return __strsuftollx(desc, val, min, max, ebuf, ebuflen, 0);
-}
-#endif /* !HAVE_STRSUFTOLL */
diff --git a/toolbox/upstream-netbsd/lib/libc/string/swab.c b/toolbox/upstream-netbsd/lib/libc/string/swab.c
deleted file mode 100644
index 392b186..0000000
--- a/toolbox/upstream-netbsd/lib/libc/string/swab.c
+++ /dev/null
@@ -1,80 +0,0 @@
-/*	$NetBSD: swab.c,v 1.18 2011/01/04 17:14:07 martin Exp $	*/
-
-/*
- * Copyright (c) 1988, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Jeffrey Mogul.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#if defined(LIBC_SCCS) && !defined(lint)
-#if 0
-static char sccsid[] = "@(#)swab.c	8.1 (Berkeley) 6/4/93";
-#else
-__RCSID("$NetBSD: swab.c,v 1.18 2011/01/04 17:14:07 martin Exp $");
-#endif
-#endif /* LIBC_SCCS and not lint */
-
-#include <assert.h>
-#include <unistd.h>
-
-void
-swab(const void * __restrict from, void * __restrict to, ssize_t len)
-{
-	char temp;
-	const char *fp;
-	char *tp;
-
-	if (len <= 1)
-		return;
-
-	_DIAGASSERT(from != NULL);
-	_DIAGASSERT(to != NULL);
-
-	len /= 2;
-	fp = (const char *)from;
-	tp = (char *)to;
-#define	STEP	temp = *fp++,*tp++ = *fp++,*tp++ = temp
-
-	if (__predict_false(len == 1)) {
-		STEP;
-		return;
-	}
-
-	/* round to multiple of 8 */
-	while ((--len % 8) != 0)
-		STEP;
-	len /= 8;
-	if (len == 0)
-		return;
-	while (len-- != 0) {
-		STEP; STEP; STEP; STEP;
-		STEP; STEP; STEP; STEP;
-	}
-}
diff --git a/toolbox/upstream-netbsd/lib/libutil/raise_default_signal.c b/toolbox/upstream-netbsd/lib/libutil/raise_default_signal.c
deleted file mode 100644
index 50cffd4..0000000
--- a/toolbox/upstream-netbsd/lib/libutil/raise_default_signal.c
+++ /dev/null
@@ -1,117 +0,0 @@
-/*	$NetBSD: raise_default_signal.c,v 1.3 2008/04/28 20:23:03 martin Exp $	 */
-
-/*-
- * Copyright (c) 2007 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by Luke Mewburn.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#if HAVE_NBTOOL_CONFIG_H
-#include "nbtool_config.h"
-#endif
-
-#include <sys/cdefs.h>
-#if defined(LIBC_SCCS) && !defined(lint)
-__RCSID("$NetBSD: raise_default_signal.c,v 1.3 2008/04/28 20:23:03 martin Exp $");
-#endif
-
-#include <errno.h>
-#include <signal.h>
-#include <stdio.h>
-#include <string.h>
-#include <util.h>
-
-#if ! HAVE_RAISE_DEFAULT_SIGNAL
-/*
- * raise_default_signal sig
- *	Raise the default signal handler for sig, by
- *	- block all signals
- *	- set the signal handler to SIG_DFL
- *	- raise the signal
- *	- unblock the signal to deliver it
- *
- *	The original signal mask and signal handler is restored on exit
- *	(whether successful or not).
- *
- *	Returns 0 on success, or -1 on failure with errno set to
- *	on of the values for sigemptyset(), sigaddset(), sigprocmask(),
- *	sigaction(), or raise().
- */
-int
-raise_default_signal(int sig)
-{
-	struct sigaction origact, act;
-	sigset_t origmask, fullmask, mask;
-	int retval, oerrno;
-
-	retval = -1;
-
-		/* Setup data structures */
-		/* XXX memset(3) isn't async-safe according to signal(7) */
-	(void)memset(&act, 0, sizeof(act));
-	act.sa_handler = SIG_DFL;
-	act.sa_flags = 0;
-	if ((sigemptyset(&act.sa_mask) == -1) ||
-	    (sigfillset(&fullmask) == -1) ||
-	    (sigemptyset(&mask) == -1) ||
-	    (sigaddset(&mask, sig) == -1))
-		goto restore_none;
-
-		/* Block all signals */
-	if (sigprocmask(SIG_BLOCK, &fullmask, &origmask) == -1)
-		goto restore_none;
-		/* (use 'goto restore_mask' to restore state) */
-
-		/* Enable the SIG_DFL handler */
-	if (sigaction(sig, &act, &origact) == -1)
-		goto restore_mask;
-		/* (use 'goto restore_act' to restore state) */
-
-		/* Raise the signal, and unblock the signal to deliver it */
-	if ((raise(sig) == -1) ||
-	    (sigprocmask(SIG_UNBLOCK, &mask, NULL) == -1))
-		goto restore_act;
-
-		/* Flag successful raise() */
-	retval = 0;
-
-		/* Restore the original handler */
- restore_act:
-	oerrno = errno;
-	(void)sigaction(sig, &origact, NULL);
-	errno = oerrno;
-
-		/* Restore the original mask */
- restore_mask:
-	oerrno = errno;
-	(void)sigprocmask(SIG_SETMASK, &origmask, NULL);
-	errno = oerrno;
-
- restore_none:
-	return retval;
-}
-
-#endif	/* ! HAVE_RAISE_DEFAULT_SIGNAL */
diff --git a/toolbox/upstream-netbsd/usr.bin/grep/fastgrep.c b/toolbox/upstream-netbsd/usr.bin/grep/fastgrep.c
deleted file mode 100644
index 2fcd864..0000000
--- a/toolbox/upstream-netbsd/usr.bin/grep/fastgrep.c
+++ /dev/null
@@ -1,336 +0,0 @@
-/*	$OpenBSD: util.c,v 1.36 2007/10/02 17:59:18 otto Exp $	*/
-/*	$FreeBSD: head/usr.bin/grep/fastgrep.c 211496 2010-08-19 09:28:59Z des $ */
-
-/*-
- * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
- * Copyright (C) 2008 Gabor Kovesdan <gabor@FreeBSD.org>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-/*
- * XXX: This file is a speed up for grep to cover the defects of the
- * regex library.  These optimizations should practically be implemented
- * there keeping this code clean.  This is a future TODO, but for the
- * meantime, we need to use this workaround.
- */
-
-#if HAVE_NBTOOL_CONFIG_H
-#include "nbtool_config.h"
-#endif
-
-#include <sys/cdefs.h>
-__RCSID("$NetBSD: fastgrep.c,v 1.5 2011/04/18 03:27:40 joerg Exp $");
-
-#include <limits.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <string.h>
-#include <wchar.h>
-#include <wctype.h>
-
-#include "grep.h"
-
-static inline int	grep_cmp(const unsigned char *, const unsigned char *, size_t);
-static inline void	grep_revstr(unsigned char *, int);
-
-void
-fgrepcomp(fastgrep_t *fg, const char *pat)
-{
-	unsigned int i;
-
-	/* Initialize. */
-	fg->len = strlen(pat);
-	fg->bol = false;
-	fg->eol = false;
-	fg->reversed = false;
-
-	fg->pattern = (unsigned char *)grep_strdup(pat);
-
-	/* Preprocess pattern. */
-	for (i = 0; i <= UCHAR_MAX; i++)
-		fg->qsBc[i] = fg->len;
-	for (i = 1; i < fg->len; i++)
-		fg->qsBc[fg->pattern[i]] = fg->len - i;
-}
-
-/*
- * Returns: -1 on failure, 0 on success
- */
-int
-fastcomp(fastgrep_t *fg, const char *pat)
-{
-	unsigned int i;
-	int firstHalfDot = -1;
-	int firstLastHalfDot = -1;
-	int hasDot = 0;
-	int lastHalfDot = 0;
-	int shiftPatternLen;
-
-	/* Initialize. */
-	fg->len = strlen(pat);
-	fg->bol = false;
-	fg->eol = false;
-	fg->reversed = false;
-	fg->word = wflag;
-
-	/* Remove end-of-line character ('$'). */
-	if (fg->len > 0 && pat[fg->len - 1] == '$') {
-		fg->eol = true;
-		fg->len--;
-	}
-
-	/* Remove beginning-of-line character ('^'). */
-	if (pat[0] == '^') {
-		fg->bol = true;
-		fg->len--;
-		pat++;
-	}
-
-	if (fg->len >= 14 &&
-	    memcmp(pat, "[[:<:]]", 7) == 0 &&
-	    memcmp(pat + fg->len - 7, "[[:>:]]", 7) == 0) {
-		fg->len -= 14;
-		pat += 7;
-		/* Word boundary is handled separately in util.c */
-		fg->word = true;
-	}
-
-	/*
-	 * pat has been adjusted earlier to not include '^', '$' or
-	 * the word match character classes at the beginning and ending
-	 * of the string respectively.
-	 */
-	fg->pattern = grep_malloc(fg->len + 1);
-	memcpy(fg->pattern, pat, fg->len);
-	fg->pattern[fg->len] = '\0';
-
-	/* Look for ways to cheat...er...avoid the full regex engine. */
-	for (i = 0; i < fg->len; i++) {
-		/* Can still cheat? */
-		if (fg->pattern[i] == '.') {
-			hasDot = i;
-			if (i < fg->len / 2) {
-				if (firstHalfDot < 0)
-					/* Closest dot to the beginning */
-					firstHalfDot = i;
-			} else {
-				/* Closest dot to the end of the pattern. */
-				lastHalfDot = i;
-				if (firstLastHalfDot < 0)
-					firstLastHalfDot = i;
-			}
-		} else {
-			/* Free memory and let others know this is empty. */
-			free(fg->pattern);
-			fg->pattern = NULL;
-			return (-1);
-		}
-	}
-
-	/*
-	 * Determine if a reverse search would be faster based on the placement
-	 * of the dots.
-	 */
-	if ((!(lflag || cflag)) && ((!(fg->bol || fg->eol)) &&
-	    ((lastHalfDot) && ((firstHalfDot < 0) ||
-	    ((fg->len - (lastHalfDot + 1)) < (size_t)firstHalfDot)))) &&
-	    !oflag && !color) {
-		fg->reversed = true;
-		hasDot = fg->len - (firstHalfDot < 0 ?
-		    firstLastHalfDot : firstHalfDot) - 1;
-		grep_revstr(fg->pattern, fg->len);
-	}
-
-	/*
-	 * Normal Quick Search would require a shift based on the position the
-	 * next character after the comparison is within the pattern.  With
-	 * wildcards, the position of the last dot effects the maximum shift
-	 * distance.
-	 * The closer to the end the wild card is the slower the search.  A
-	 * reverse version of this algorithm would be useful for wildcards near
-	 * the end of the string.
-	 *
-	 * Examples:
-	 * Pattern	Max shift
-	 * -------	---------
-	 * this		5
-	 * .his		4
-	 * t.is		3
-	 * th.s		2
-	 * thi.		1
-	 */
-
-	/* Adjust the shift based on location of the last dot ('.'). */
-	shiftPatternLen = fg->len - hasDot;
-
-	/* Preprocess pattern. */
-	for (i = 0; i <= (signed)UCHAR_MAX; i++)
-		fg->qsBc[i] = shiftPatternLen;
-	for (i = hasDot + 1; i < fg->len; i++) {
-		fg->qsBc[fg->pattern[i]] = fg->len - i;
-	}
-
-	/*
-	 * Put pattern back to normal after pre-processing to allow for easy
-	 * comparisons later.
-	 */
-	if (fg->reversed)
-		grep_revstr(fg->pattern, fg->len);
-
-	return (0);
-}
-
-int
-grep_search(fastgrep_t *fg, const unsigned char *data, size_t len, regmatch_t *pmatch)
-{
-	unsigned int j;
-	int ret = REG_NOMATCH;
-
-	if (pmatch->rm_so == (ssize_t)len)
-		return (ret);
-
-	if (fg->bol && pmatch->rm_so != 0) {
-		pmatch->rm_so = len;
-		pmatch->rm_eo = len;
-		return (ret);
-	}
-
-	/* No point in going farther if we do not have enough data. */
-	if (len < fg->len)
-		return (ret);
-
-	/* Only try once at the beginning or ending of the line. */
-	if (fg->bol || fg->eol) {
-		/* Simple text comparison. */
-		/* Verify data is >= pattern length before searching on it. */
-		if (len >= fg->len) {
-			/* Determine where in data to start search at. */
-			j = fg->eol ? len - fg->len : 0;
-			if (!((fg->bol && fg->eol) && (len != fg->len)))
-				if (grep_cmp(fg->pattern, data + j,
-				    fg->len) == -1) {
-					pmatch->rm_so = j;
-					pmatch->rm_eo = j + fg->len;
-						ret = 0;
-				}
-		}
-	} else if (fg->reversed) {
-		/* Quick Search algorithm. */
-		j = len;
-		do {
-			if (grep_cmp(fg->pattern, data + j - fg->len,
-				fg->len) == -1) {
-				pmatch->rm_so = j - fg->len;
-				pmatch->rm_eo = j;
-				ret = 0;
-				break;
-			}
-			/* Shift if within bounds, otherwise, we are done. */
-			if (j == fg->len)
-				break;
-			j -= fg->qsBc[data[j - fg->len - 1]];
-		} while (j >= fg->len);
-	} else {
-		/* Quick Search algorithm. */
-		j = pmatch->rm_so;
-		do {
-			if (grep_cmp(fg->pattern, data + j, fg->len) == -1) {
-				pmatch->rm_so = j;
-				pmatch->rm_eo = j + fg->len;
-				ret = 0;
-				break;
-			}
-
-			/* Shift if within bounds, otherwise, we are done. */
-			if (j + fg->len == len)
-				break;
-			else
-				j += fg->qsBc[data[j + fg->len]];
-		} while (j <= (len - fg->len));
-	}
-
-	return (ret);
-}
-
-/*
- * Returns:	i >= 0 on failure (position that it failed)
- *		-1 on success
- */
-static inline int
-grep_cmp(const unsigned char *pat, const unsigned char *data, size_t len)
-{
-	size_t size;
-	wchar_t *wdata, *wpat;
-	unsigned int i;
-
-	if (iflag) {
-		if ((size = mbstowcs(NULL, (const char *)data, 0)) ==
-		    ((size_t) - 1))
-			return (-1);
-
-		wdata = grep_malloc(size * sizeof(wint_t));
-
-		if (mbstowcs(wdata, (const char *)data, size) ==
-		    ((size_t) - 1))
-			return (-1);
-
-		if ((size = mbstowcs(NULL, (const char *)pat, 0)) ==
-		    ((size_t) - 1))
-			return (-1);
-
-		wpat = grep_malloc(size * sizeof(wint_t));
-
-		if (mbstowcs(wpat, (const char *)pat, size) == ((size_t) - 1))
-			return (-1);
-		for (i = 0; i < len; i++) {
-			if ((towlower(wpat[i]) == towlower(wdata[i])) ||
-			    ((grepbehave != GREP_FIXED) && wpat[i] == L'.'))
-				continue;
-			free(wpat);
-			free(wdata);
-				return (i);
-		}
-	} else {
-		for (i = 0; i < len; i++) {
-			if ((pat[i] == data[i]) || ((grepbehave != GREP_FIXED) &&
-			    pat[i] == '.'))
-				continue;
-			return (i);
-		}
-	}
-	return (-1);
-}
-
-static inline void
-grep_revstr(unsigned char *str, int len)
-{
-	int i;
-	char c;
-
-	for (i = 0; i < len / 2; i++) {
-		c = str[i];
-		str[i] = str[len - i - 1];
-		str[len - i - 1] = c;
-	}
-}
diff --git a/toolbox/upstream-netbsd/usr.bin/grep/file.c b/toolbox/upstream-netbsd/usr.bin/grep/file.c
deleted file mode 100644
index cf4a0fa..0000000
--- a/toolbox/upstream-netbsd/usr.bin/grep/file.c
+++ /dev/null
@@ -1,271 +0,0 @@
-/*	$NetBSD: file.c,v 1.7 2011/04/18 22:46:48 joerg Exp $	*/
-/*	$FreeBSD: head/usr.bin/grep/file.c 211496 2010-08-19 09:28:59Z des $	*/
-/*	$OpenBSD: file.c,v 1.11 2010/07/02 20:48:48 nicm Exp $	*/
-
-/*-
- * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
- * Copyright (C) 2008-2010 Gabor Kovesdan <gabor@FreeBSD.org>
- * Copyright (C) 2010 Dimitry Andric <dimitry@andric.com>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#if HAVE_NBTOOL_CONFIG_H
-#include "nbtool_config.h"
-#endif
-
-#include <sys/cdefs.h>
-__RCSID("$NetBSD: file.c,v 1.7 2011/04/18 22:46:48 joerg Exp $");
-
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-
-#ifndef __ANDROID__
-#include <bzlib.h>
-#endif
-#include <err.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <wchar.h>
-#include <wctype.h>
-#ifndef __ANDROID__
-#include <zlib.h>
-#endif
-
-#include "grep.h"
-
-#define	MAXBUFSIZ	(32 * 1024)
-#define	LNBUFBUMP	80
-
-#ifndef __ANDROID__
-static gzFile gzbufdesc;
-static BZFILE* bzbufdesc;
-#endif
-
-static unsigned char buffer[MAXBUFSIZ];
-static unsigned char *bufpos;
-static size_t bufrem;
-
-static unsigned char *lnbuf;
-static size_t lnbuflen;
-
-static inline int
-grep_refill(struct file *f)
-{
-	ssize_t nr;
-#ifndef __ANDROID__
-	int bzerr;
-#endif
-
-	bufpos = buffer;
-	bufrem = 0;
-
-#ifndef __ANDROID__
-	if (filebehave == FILE_GZIP)
-		nr = gzread(gzbufdesc, buffer, MAXBUFSIZ);
-	else if (filebehave == FILE_BZIP && bzbufdesc != NULL) {
-		nr = BZ2_bzRead(&bzerr, bzbufdesc, buffer, MAXBUFSIZ);
-		switch (bzerr) {
-		case BZ_OK:
-		case BZ_STREAM_END:
-			/* No problem, nr will be okay */
-			break;
-		case BZ_DATA_ERROR_MAGIC:
-			/*
-			 * As opposed to gzread(), which simply returns the
-			 * plain file data, if it is not in the correct
-			 * compressed format, BZ2_bzRead() instead aborts.
-			 *
-			 * So, just restart at the beginning of the file again,
-			 * and use plain reads from now on.
-			 */
-			BZ2_bzReadClose(&bzerr, bzbufdesc);
-			bzbufdesc = NULL;
-			if (lseek(f->fd, 0, SEEK_SET) == -1)
-				return (-1);
-			nr = read(f->fd, buffer, MAXBUFSIZ);
-			break;
-		default:
-			/* Make sure we exit with an error */
-			nr = -1;
-		}
-	} else
-#endif
-		nr = read(f->fd, buffer, MAXBUFSIZ);
-
-	if (nr < 0)
-		return (-1);
-
-	bufrem = nr;
-	return (0);
-}
-
-static inline int
-grep_lnbufgrow(size_t newlen)
-{
-
-	if (lnbuflen < newlen) {
-		lnbuf = grep_realloc(lnbuf, newlen);
-		lnbuflen = newlen;
-	}
-
-	return (0);
-}
-
-char *
-grep_fgetln(struct file *f, size_t *lenp)
-{
-	unsigned char *p;
-	char *ret;
-	size_t len;
-	size_t off;
-	ptrdiff_t diff;
-
-	/* Fill the buffer, if necessary */
-	if (bufrem == 0 && grep_refill(f) != 0)
-		goto error;
-
-	if (bufrem == 0) {
-		/* Return zero length to indicate EOF */
-		*lenp = 0;
-		return ((char *)bufpos);
-	}
-
-	/* Look for a newline in the remaining part of the buffer */
-	if ((p = memchr(bufpos, line_sep, bufrem)) != NULL) {
-		++p; /* advance over newline */
-		ret = (char *)bufpos;
-		len = p - bufpos;
-		bufrem -= len;
-		bufpos = p;
-		*lenp = len;
-		return (ret);
-	}
-
-	/* We have to copy the current buffered data to the line buffer */
-	for (len = bufrem, off = 0; ; len += bufrem) {
-		/* Make sure there is room for more data */
-		if (grep_lnbufgrow(len + LNBUFBUMP))
-			goto error;
-		memcpy(lnbuf + off, bufpos, len - off);
-		off = len;
-		if (grep_refill(f) != 0)
-			goto error;
-		if (bufrem == 0)
-			/* EOF: return partial line */
-			break;
-		if ((p = memchr(bufpos, line_sep, bufrem)) == NULL)
-			continue;
-		/* got it: finish up the line (like code above) */
-		++p;
-		diff = p - bufpos;
-		len += diff;
-		if (grep_lnbufgrow(len))
-		    goto error;
-		memcpy(lnbuf + off, bufpos, diff);
-		bufrem -= diff;
-		bufpos = p;
-		break;
-	}
-	*lenp = len;
-	return ((char *)lnbuf);
-
-error:
-	*lenp = 0;
-	return (NULL);
-}
-
-static inline struct file *
-grep_file_init(struct file *f)
-{
-
-#ifndef __ANDROID__
-	if (filebehave == FILE_GZIP &&
-	    (gzbufdesc = gzdopen(f->fd, "r")) == NULL)
-		goto error;
-
-	if (filebehave == FILE_BZIP &&
-	    (bzbufdesc = BZ2_bzdopen(f->fd, "r")) == NULL)
-		goto error;
-#endif
-
-	/* Fill read buffer, also catches errors early */
-	if (grep_refill(f) != 0)
-		goto error;
-
-	/* Check for binary stuff, if necessary */
-	if (!nulldataflag && binbehave != BINFILE_TEXT &&
-	    memchr(bufpos, '\0', bufrem) != NULL)
-		f->binary = true;
-
-	return (f);
-error:
-	close(f->fd);
-	free(f);
-	return (NULL);
-}
-
-/*
- * Opens a file for processing.
- */
-struct file *
-grep_open(const char *path)
-{
-	struct file *f;
-
-	f = grep_malloc(sizeof *f);
-	memset(f, 0, sizeof *f);
-	if (path == NULL) {
-		/* Processing stdin implies --line-buffered. */
-		lbflag = true;
-		f->fd = STDIN_FILENO;
-	} else if ((f->fd = open(path, O_RDONLY)) == -1) {
-		free(f);
-		return (NULL);
-	}
-
-	return (grep_file_init(f));
-}
-
-/*
- * Closes a file.
- */
-void
-grep_close(struct file *f)
-{
-
-	close(f->fd);
-
-	/* Reset read buffer and line buffer */
-	bufpos = buffer;
-	bufrem = 0;
-
-	free(lnbuf);
-	lnbuf = NULL;
-	lnbuflen = 0;
-}
diff --git a/toolbox/upstream-netbsd/usr.bin/grep/grep.c b/toolbox/upstream-netbsd/usr.bin/grep/grep.c
deleted file mode 100644
index 1ea6ed3..0000000
--- a/toolbox/upstream-netbsd/usr.bin/grep/grep.c
+++ /dev/null
@@ -1,707 +0,0 @@
-/*	$NetBSD: grep.c,v 1.12 2014/07/11 16:30:45 christos Exp $	*/
-/* 	$FreeBSD: head/usr.bin/grep/grep.c 211519 2010-08-19 22:55:17Z delphij $	*/
-/*	$OpenBSD: grep.c,v 1.42 2010/07/02 22:18:03 tedu Exp $	*/
-
-/*-
- * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
- * Copyright (C) 2008-2009 Gabor Kovesdan <gabor@FreeBSD.org>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#if HAVE_NBTOOL_CONFIG_H
-#include "nbtool_config.h"
-#endif
-
-#include <sys/cdefs.h>
-__RCSID("$NetBSD: grep.c,v 1.12 2014/07/11 16:30:45 christos Exp $");
-
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include <ctype.h>
-#include <err.h>
-#include <errno.h>
-#include <getopt.h>
-#include <limits.h>
-#include <libgen.h>
-#include <locale.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "grep.h"
-
-#ifndef WITHOUT_NLS
-#include <nl_types.h>
-nl_catd	 catalog;
-#endif
-
-/*
- * Default messags to use when NLS is disabled or no catalogue
- * is found.
- */
-const char	*errstr[] = {
-	"",
-/* 1*/	"(standard input)",
-/* 2*/	"cannot read bzip2 compressed file",
-/* 3*/	"unknown %s option",
-/* 4*/	"usage: %s [-abcDEFGHhIiJLlmnOoPqRSsUVvwxZz] [-A num] [-B num] [-C[num]]\n",
-/* 5*/	"\t[-e pattern] [-f file] [--binary-files=value] [--color=when]\n",
-/* 6*/	"\t[--context[=num]] [--directories=action] [--label] [--line-buffered]\n",
-/* 7*/	"\t[pattern] [file ...]\n",
-/* 8*/	"Binary file %s matches\n",
-/* 9*/	"%s (BSD grep) %s\n",
-};
-
-/* Flags passed to regcomp() and regexec() */
-int		 cflags = 0;
-int		 eflags = REG_STARTEND;
-
-/* Searching patterns */
-unsigned int	 patterns, pattern_sz;
-char		**pattern;
-regex_t		*r_pattern;
-fastgrep_t	*fg_pattern;
-
-/* Filename exclusion/inclusion patterns */
-unsigned int	 fpatterns, fpattern_sz;
-unsigned int	 dpatterns, dpattern_sz;
-struct epat	*dpattern, *fpattern;
-
-/* For regex errors  */
-char	 re_error[RE_ERROR_BUF + 1];
-
-/* Command-line flags */
-unsigned long long Aflag;	/* -A x: print x lines trailing each match */
-unsigned long long Bflag;	/* -B x: print x lines leading each match */
-bool	 Hflag;		/* -H: always print file name */
-bool	 Lflag;		/* -L: only show names of files with no matches */
-bool	 bflag;		/* -b: show block numbers for each match */
-bool	 cflag;		/* -c: only show a count of matching lines */
-bool	 hflag;		/* -h: don't print filename headers */
-bool	 iflag;		/* -i: ignore case */
-bool	 lflag;		/* -l: only show names of files with matches */
-bool	 mflag;		/* -m x: stop reading the files after x matches */
-unsigned long long mcount;	/* count for -m */
-bool	 nflag;		/* -n: show line numbers in front of matching lines */
-bool	 oflag;		/* -o: print only matching part */
-bool	 qflag;		/* -q: quiet mode (don't output anything) */
-bool	 sflag;		/* -s: silent mode (ignore errors) */
-bool	 vflag;		/* -v: only show non-matching lines */
-bool	 wflag;		/* -w: pattern must start and end on word boundaries */
-bool	 xflag;		/* -x: pattern must match entire line */
-bool	 lbflag;	/* --line-buffered */
-bool	 nullflag;	/* --null */
-bool	 nulldataflag;	/* --null-data */
-unsigned char line_sep = '\n';	/* 0 for --null-data */
-char	*label;		/* --label */
-const char *color;	/* --color */
-int	 grepbehave = GREP_BASIC;	/* -EFGP: type of the regex */
-int	 binbehave = BINFILE_BIN;	/* -aIU: handling of binary files */
-int	 filebehave = FILE_STDIO;	/* -JZ: normal, gzip or bzip2 file */
-int	 devbehave = DEV_READ;		/* -D: handling of devices */
-int	 dirbehave = DIR_READ;		/* -dRr: handling of directories */
-int	 linkbehave = LINK_READ;	/* -OpS: handling of symlinks */
-
-bool	 dexclude, dinclude;	/* --exclude-dir and --include-dir */
-bool	 fexclude, finclude;	/* --exclude and --include */
-
-enum {
-	BIN_OPT = CHAR_MAX + 1,
-	COLOR_OPT,
-	DECOMPRESS_OPT,
-	HELP_OPT,
-	MMAP_OPT,
-	LINEBUF_OPT,
-	LABEL_OPT,
-	R_EXCLUDE_OPT,
-	R_INCLUDE_OPT,
-	R_DEXCLUDE_OPT,
-	R_DINCLUDE_OPT
-};
-
-static inline const char	*init_color(const char *);
-
-/* Housekeeping */
-int	 tail;		/* lines left to print */
-bool	 notfound;	/* file not found */
-
-extern char	*__progname;
-
-/*
- * Prints usage information and returns 2.
- */
-__dead static void
-usage(void)
-{
-	fprintf(stderr, getstr(4), __progname);
-	fprintf(stderr, "%s", getstr(5));
-	fprintf(stderr, "%s", getstr(6));
-	fprintf(stderr, "%s", getstr(7));
-	exit(2);
-}
-
-static const char optstr[] =
-    "0123456789A:B:C:D:EFGHIJLOPSRUVZabcd:e:f:hilm:nopqrsuvwxyz";
-
-struct option long_options[] =
-{
-	{"binary-files",	required_argument,	NULL, BIN_OPT},
-	{"decompress",          no_argument,            NULL, DECOMPRESS_OPT},
-	{"help",		no_argument,		NULL, HELP_OPT},
-	{"mmap",		no_argument,		NULL, MMAP_OPT},
-	{"line-buffered",	no_argument,		NULL, LINEBUF_OPT},
-	{"label",		required_argument,	NULL, LABEL_OPT},
-	{"color",		optional_argument,	NULL, COLOR_OPT},
-	{"colour",		optional_argument,	NULL, COLOR_OPT},
-	{"exclude",		required_argument,	NULL, R_EXCLUDE_OPT},
-	{"include",		required_argument,	NULL, R_INCLUDE_OPT},
-	{"exclude-dir",		required_argument,	NULL, R_DEXCLUDE_OPT},
-	{"include-dir",		required_argument,	NULL, R_DINCLUDE_OPT},
-	{"after-context",	required_argument,	NULL, 'A'},
-	{"text",		no_argument,		NULL, 'a'},
-	{"before-context",	required_argument,	NULL, 'B'},
-	{"byte-offset",		no_argument,		NULL, 'b'},
-	{"context",		optional_argument,	NULL, 'C'},
-	{"count",		no_argument,		NULL, 'c'},
-	{"devices",		required_argument,	NULL, 'D'},
-        {"directories",		required_argument,	NULL, 'd'},
-	{"extended-regexp",	no_argument,		NULL, 'E'},
-	{"regexp",		required_argument,	NULL, 'e'},
-	{"fixed-strings",	no_argument,		NULL, 'F'},
-	{"file",		required_argument,	NULL, 'f'},
-	{"basic-regexp",	no_argument,		NULL, 'G'},
-	{"no-filename",		no_argument,		NULL, 'h'},
-	{"with-filename",	no_argument,		NULL, 'H'},
-	{"ignore-case",		no_argument,		NULL, 'i'},
-	{"bz2decompress",	no_argument,		NULL, 'J'},
-	{"files-with-matches",	no_argument,		NULL, 'l'},
-	{"files-without-match", no_argument,            NULL, 'L'},
-	{"max-count",		required_argument,	NULL, 'm'},
-	{"line-number",		no_argument,		NULL, 'n'},
-	{"only-matching",	no_argument,		NULL, 'o'},
-	{"quiet",		no_argument,		NULL, 'q'},
-	{"silent",		no_argument,		NULL, 'q'},
-	{"recursive",		no_argument,		NULL, 'r'},
-	{"no-messages",		no_argument,		NULL, 's'},
-	{"binary",		no_argument,		NULL, 'U'},
-	{"unix-byte-offsets",	no_argument,		NULL, 'u'},
-	{"invert-match",	no_argument,		NULL, 'v'},
-	{"version",		no_argument,		NULL, 'V'},
-	{"word-regexp",		no_argument,		NULL, 'w'},
-	{"line-regexp",		no_argument,		NULL, 'x'},
-	{"null",		no_argument,		NULL, 'Z'},
-	{"null-data",		no_argument,		NULL, 'z'},
-	{NULL,			no_argument,		NULL, 0}
-};
-
-/*
- * Adds a searching pattern to the internal array.
- */
-static void
-add_pattern(char *pat, size_t len)
-{
-
-	/* TODO: Check for empty patterns and shortcut */
-
-	/* Increase size if necessary */
-	if (patterns == pattern_sz) {
-		pattern_sz *= 2;
-		pattern = grep_realloc(pattern, ++pattern_sz *
-		    sizeof(*pattern));
-	}
-	if (len > 0 && pat[len - 1] == '\n')
-		--len;
-	/* pat may not be NUL-terminated */
-	pattern[patterns] = grep_malloc(len + 1);
-	memcpy(pattern[patterns], pat, len);
-	pattern[patterns][len] = '\0';
-	++patterns;
-}
-
-/*
- * Adds a file include/exclude pattern to the internal array.
- */
-static void
-add_fpattern(const char *pat, int mode)
-{
-
-	/* Increase size if necessary */
-	if (fpatterns == fpattern_sz) {
-		fpattern_sz *= 2;
-		fpattern = grep_realloc(fpattern, ++fpattern_sz *
-		    sizeof(struct epat));
-	}
-	fpattern[fpatterns].pat = grep_strdup(pat);
-	fpattern[fpatterns].mode = mode;
-	++fpatterns;
-}
-
-/*
- * Adds a directory include/exclude pattern to the internal array.
- */
-static void
-add_dpattern(const char *pat, int mode)
-{
-
-	/* Increase size if necessary */
-	if (dpatterns == dpattern_sz) {
-		dpattern_sz *= 2;
-		dpattern = grep_realloc(dpattern, ++dpattern_sz *
-		    sizeof(struct epat));
-	}
-	dpattern[dpatterns].pat = grep_strdup(pat);
-	dpattern[dpatterns].mode = mode;
-	++dpatterns;
-}
-
-/*
- * Reads searching patterns from a file and adds them with add_pattern().
- */
-static void
-read_patterns(const char *fn)
-{
-	FILE *f;
-	char *line;
-	size_t len;
-	ssize_t rlen;
-
-	if ((f = fopen(fn, "r")) == NULL)
-		err(2, "%s", fn);
-	line = NULL;
-	len = 0;
-	while ((rlen = getline(&line, &len, f)) != -1)
-		add_pattern(line, *line == '\n' ? 0 : (size_t)rlen);
-	free(line);
-	if (ferror(f))
-		err(2, "%s", fn);
-	fclose(f);
-}
-
-static inline const char *
-init_color(const char *d)
-{
-	char *c;
-
-	c = getenv("GREP_COLOR");
-	return (c != NULL ? c : d);
-}
-
-int
-main(int argc, char *argv[])
-{
-	char **aargv, **eargv, *eopts;
-	char *ep;
-	unsigned long long l;
-	unsigned int aargc, eargc, i, j;
-	int c, lastc, needpattern, newarg, prevoptind;
-
-	setlocale(LC_ALL, "");
-
-#ifndef WITHOUT_NLS
-	catalog = catopen("grep", NL_CAT_LOCALE);
-#endif
-
-	/* Check what is the program name of the binary.  In this
-	   way we can have all the funcionalities in one binary
-	   without the need of scripting and using ugly hacks. */
-	switch (__progname[0]) {
-	case 'e':
-		grepbehave = GREP_EXTENDED;
-		break;
-	case 'f':
-		grepbehave = GREP_FIXED;
-		break;
-	case 'g':
-		grepbehave = GREP_BASIC;
-		break;
-	case 'z':
-		filebehave = FILE_GZIP;
-		switch(__progname[1]) {
-		case 'e':
-			grepbehave = GREP_EXTENDED;
-			break;
-		case 'f':
-			grepbehave = GREP_FIXED;
-			break;
-		case 'g':
-			grepbehave = GREP_BASIC;
-			break;
-		}
-		break;
-	}
-
-	lastc = '\0';
-	newarg = 1;
-	prevoptind = 1;
-	needpattern = 1;
-
-	eopts = getenv("GREP_OPTIONS");
-
-	/* support for extra arguments in GREP_OPTIONS */
-	eargc = 0;
-	if (eopts != NULL) {
-		char *str;
-
-		/* make an estimation of how many extra arguments we have */
-		for (j = 0; j < strlen(eopts); j++)
-			if (eopts[j] == ' ')
-				eargc++;
-
-		eargv = (char **)grep_malloc(sizeof(char *) * (eargc + 1));
-
-		eargc = 0;
-		/* parse extra arguments */
-		while ((str = strsep(&eopts, " ")) != NULL)
-			eargv[eargc++] = grep_strdup(str);
-
-		aargv = (char **)grep_calloc(eargc + argc + 1,
-		    sizeof(char *));
-
-		aargv[0] = argv[0];
-		for (i = 0; i < eargc; i++)
-			aargv[i + 1] = eargv[i];
-		for (j = 1; j < (unsigned int)argc; j++, i++)
-			aargv[i + 1] = argv[j];
-
-		aargc = eargc + argc;
-	} else {
-		aargv = argv;
-		aargc = argc;
-	}
-
-	while (((c = getopt_long(aargc, aargv, optstr, long_options, NULL)) !=
-	    -1)) {
-		switch (c) {
-		case '0': case '1': case '2': case '3': case '4':
-		case '5': case '6': case '7': case '8': case '9':
-			if (newarg || !isdigit(lastc))
-				Aflag = 0;
-			else if (Aflag > LLONG_MAX / 10) {
-				errno = ERANGE;
-				err(2, NULL);
-			}
-			Aflag = Bflag = (Aflag * 10) + (c - '0');
-			break;
-		case 'C':
-			if (optarg == NULL) {
-				Aflag = Bflag = 2;
-				break;
-			}
-			/* FALLTHROUGH */
-		case 'A':
-			/* FALLTHROUGH */
-		case 'B':
-			errno = 0;
-			l = strtoull(optarg, &ep, 10);
-			if (((errno == ERANGE) && (l == ULLONG_MAX)) ||
-			    ((errno == EINVAL) && (l == 0)))
-				err(2, NULL);
-			else if (ep[0] != '\0') {
-				errno = EINVAL;
-				err(2, NULL);
-			}
-			if (c == 'A')
-				Aflag = l;
-			else if (c == 'B')
-				Bflag = l;
-			else
-				Aflag = Bflag = l;
-			break;
-		case 'a':
-			binbehave = BINFILE_TEXT;
-			break;
-		case 'b':
-			bflag = true;
-			break;
-		case 'c':
-			cflag = true;
-			break;
-		case 'D':
-			if (strcasecmp(optarg, "skip") == 0)
-				devbehave = DEV_SKIP;
-			else if (strcasecmp(optarg, "read") == 0)
-				devbehave = DEV_READ;
-			else
-				errx(2, getstr(3), "--devices");
-			break;
-		case 'd':
-			if (strcasecmp("recurse", optarg) == 0) {
-				Hflag = true;
-				dirbehave = DIR_RECURSE;
-			} else if (strcasecmp("skip", optarg) == 0)
-				dirbehave = DIR_SKIP;
-			else if (strcasecmp("read", optarg) == 0)
-				dirbehave = DIR_READ;
-			else
-				errx(2, getstr(3), "--directories");
-			break;
-		case 'E':
-			grepbehave = GREP_EXTENDED;
-			break;
-		case 'e':
-			add_pattern(optarg, strlen(optarg));
-			needpattern = 0;
-			break;
-		case 'F':
-			grepbehave = GREP_FIXED;
-			break;
-		case 'f':
-			read_patterns(optarg);
-			needpattern = 0;
-			break;
-		case 'G':
-			grepbehave = GREP_BASIC;
-			break;
-		case 'H':
-			Hflag = true;
-			break;
-		case 'h':
-			Hflag = false;
-			hflag = true;
-			break;
-		case 'I':
-			binbehave = BINFILE_SKIP;
-			break;
-		case 'i':
-		case 'y':
-			iflag =  true;
-			cflags |= REG_ICASE;
-			break;
-		case 'J':
-			filebehave = FILE_BZIP;
-			break;
-		case 'L':
-			lflag = false;
-			Lflag = true;
-			break;
-		case 'l':
-			Lflag = false;
-			lflag = true;
-			break;
-		case 'm':
-			mflag = true;
-			errno = 0;
-			mcount = strtoull(optarg, &ep, 10);
-			if (((errno == ERANGE) && (mcount == ULLONG_MAX)) ||
-			    ((errno == EINVAL) && (mcount == 0)))
-				err(2, NULL);
-			else if (ep[0] != '\0') {
-				errno = EINVAL;
-				err(2, NULL);
-			}
-			break;
-		case 'n':
-			nflag = true;
-			break;
-		case 'O':
-			linkbehave = LINK_EXPLICIT;
-			break;
-		case 'o':
-			oflag = true;
-			break;
-		case 'p':
-			linkbehave = LINK_SKIP;
-			break;
-		case 'q':
-			qflag = true;
-			break;
-		case 'S':
-			linkbehave = LINK_READ;
-			break;
-		case 'R':
-		case 'r':
-			dirbehave = DIR_RECURSE;
-			Hflag = true;
-			break;
-		case 's':
-			sflag = true;
-			break;
-		case 'U':
-			binbehave = BINFILE_BIN;
-			break;
-		case 'u':
-		case MMAP_OPT:
-			/* noop, compatibility */
-			break;
-		case 'V':
-			printf(getstr(9), __progname, VERSION);
-			exit(0);
-		case 'v':
-			vflag = true;
-			break;
-		case 'w':
-			wflag = true;
-			break;
-		case 'x':
-			xflag = true;
-			break;
-		case 'Z':
-			nullflag = true;
-			break;
-		case 'z':
-			nulldataflag = true;
-			line_sep = '\0';
-			break;
-		case BIN_OPT:
-			if (strcasecmp("binary", optarg) == 0)
-				binbehave = BINFILE_BIN;
-			else if (strcasecmp("without-match", optarg) == 0)
-				binbehave = BINFILE_SKIP;
-			else if (strcasecmp("text", optarg) == 0)
-				binbehave = BINFILE_TEXT;
-			else
-				errx(2, getstr(3), "--binary-files");
-			break;
-		case COLOR_OPT:
-			color = NULL;
-			if (optarg == NULL || strcasecmp("auto", optarg) == 0 ||
-			    strcasecmp("tty", optarg) == 0 ||
-			    strcasecmp("if-tty", optarg) == 0) {
-				char *term;
-
-				term = getenv("TERM");
-				if (isatty(STDOUT_FILENO) && term != NULL &&
-				    strcasecmp(term, "dumb") != 0)
-					color = init_color("01;31");
-			} else if (strcasecmp("always", optarg) == 0 ||
-			    strcasecmp("yes", optarg) == 0 ||
-			    strcasecmp("force", optarg) == 0) {
-				color = init_color("01;31");
-			} else if (strcasecmp("never", optarg) != 0 &&
-			    strcasecmp("none", optarg) != 0 &&
-			    strcasecmp("no", optarg) != 0)
-				errx(2, getstr(3), "--color");
-			break;
-		case DECOMPRESS_OPT:
-			filebehave = FILE_GZIP;
-			break;
-		case LABEL_OPT:
-			label = optarg;
-			break;
-		case LINEBUF_OPT:
-			lbflag = true;
-			break;
-		case R_INCLUDE_OPT:
-			finclude = true;
-			add_fpattern(optarg, INCL_PAT);
-			break;
-		case R_EXCLUDE_OPT:
-			fexclude = true;
-			add_fpattern(optarg, EXCL_PAT);
-			break;
-		case R_DINCLUDE_OPT:
-			dinclude = true;
-			add_dpattern(optarg, INCL_PAT);
-			break;
-		case R_DEXCLUDE_OPT:
-			dexclude = true;
-			add_dpattern(optarg, EXCL_PAT);
-			break;
-		case HELP_OPT:
-		default:
-			usage();
-		}
-		lastc = c;
-		newarg = optind != prevoptind;
-		prevoptind = optind;
-	}
-	aargc -= optind;
-	aargv += optind;
-
-	/* Fail if we don't have any pattern */
-	if (aargc == 0 && needpattern)
-		usage();
-
-	/* Process patterns from command line */
-	if (aargc != 0 && needpattern) {
-		add_pattern(*aargv, strlen(*aargv));
-		--aargc;
-		++aargv;
-	}
-
-	switch (grepbehave) {
-	case GREP_FIXED:
-	case GREP_BASIC:
-		break;
-	case GREP_EXTENDED:
-		cflags |= REG_EXTENDED;
-		break;
-	default:
-		/* NOTREACHED */
-		usage();
-	}
-
-	fg_pattern = grep_calloc(patterns, sizeof(*fg_pattern));
-	r_pattern = grep_calloc(patterns, sizeof(*r_pattern));
-/*
- * XXX: fgrepcomp() and fastcomp() are workarounds for regexec() performance.
- * Optimizations should be done there.
- */
-		/* Check if cheating is allowed (always is for fgrep). */
-	if (grepbehave == GREP_FIXED) {
-		for (i = 0; i < patterns; ++i)
-			fgrepcomp(&fg_pattern[i], pattern[i]);
-	} else {
-		for (i = 0; i < patterns; ++i) {
-			if (fastcomp(&fg_pattern[i], pattern[i])) {
-				/* Fall back to full regex library */
-				c = regcomp(&r_pattern[i], pattern[i], cflags);
-				if (c != 0) {
-					regerror(c, &r_pattern[i], re_error,
-					    RE_ERROR_BUF);
-					errx(2, "%s", re_error);
-				}
-			}
-		}
-	}
-
-	if (lbflag)
-		setlinebuf(stdout);
-
-	if ((aargc == 0 || aargc == 1) && !Hflag)
-		hflag = true;
-
-	if (aargc == 0)
-		exit(!procfile("-"));
-
-	if (dirbehave == DIR_RECURSE)
-		c = grep_tree(aargv);
-	else
-		for (c = 0; aargc--; ++aargv) {
-			if ((finclude || fexclude) && !file_matching(*aargv))
-				continue;
-			c+= procfile(*aargv);
-		}
-
-#ifndef WITHOUT_NLS
-	catclose(catalog);
-#endif
-
-	/* Find out the correct return value according to the
-	   results and the command line option. */
-	exit(c ? (notfound ? (qflag ? 0 : 2) : 0) : (notfound ? 2 : 1));
-}
diff --git a/toolbox/upstream-netbsd/usr.bin/grep/grep.h b/toolbox/upstream-netbsd/usr.bin/grep/grep.h
deleted file mode 100644
index fa2a3e3..0000000
--- a/toolbox/upstream-netbsd/usr.bin/grep/grep.h
+++ /dev/null
@@ -1,162 +0,0 @@
-/*	$NetBSD: grep.h,v 1.8 2012/05/06 22:27:00 joerg Exp $	*/
-/*	$OpenBSD: grep.h,v 1.15 2010/04/05 03:03:55 tedu Exp $	*/
-/*	$FreeBSD: head/usr.bin/grep/grep.h 211496 2010-08-19 09:28:59Z des $	*/
-
-/*-
- * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
- * Copyright (c) 2008-2009 Gabor Kovesdan <gabor@FreeBSD.org>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef __ANDROID__
-#include <bzlib.h>
-#endif
-#include <limits.h>
-#include <regex.h>
-#include <stdbool.h>
-#include <stdio.h>
-#ifndef __ANDROID__
-#include <zlib.h>
-#endif
-
-#ifdef WITHOUT_NLS
-#define getstr(n)	 errstr[n]
-#else
-#include <nl_types.h>
-
-extern nl_catd		 catalog;
-#define getstr(n)	 catgets(catalog, 1, n, errstr[n])
-#endif
-
-extern const char		*errstr[];
-
-#define VERSION		"2.5.1-FreeBSD"
-
-#define GREP_FIXED	0
-#define GREP_BASIC	1
-#define GREP_EXTENDED	2
-
-#define BINFILE_BIN	0
-#define BINFILE_SKIP	1
-#define BINFILE_TEXT	2
-
-#define FILE_STDIO	0
-#define FILE_GZIP	1
-#define FILE_BZIP	2
-
-#define DIR_READ	0
-#define DIR_SKIP	1
-#define DIR_RECURSE	2
-
-#define DEV_READ	0
-#define DEV_SKIP	1
-
-#define LINK_READ	0
-#define LINK_EXPLICIT	1
-#define LINK_SKIP	2
-
-#define EXCL_PAT	0
-#define INCL_PAT	1
-
-#define MAX_LINE_MATCHES	32
-
-struct file {
-	int		 fd;
-	bool		 binary;
-};
-
-struct str {
-	off_t		 off;
-	size_t		 len;
-	char		*dat;
-	char		*file;
-	int		 line_no;
-};
-
-struct epat {
-	char		*pat;
-	int		 mode;
-};
-
-typedef struct {
-	size_t		 len;
-	unsigned char	*pattern;
-	int		 qsBc[UCHAR_MAX + 1];
-	/* flags */
-	bool		 bol;
-	bool		 eol;
-	bool		 reversed;
-	bool		 word;
-} fastgrep_t;
-
-/* Flags passed to regcomp() and regexec() */
-extern int	 cflags, eflags;
-
-/* Command line flags */
-extern bool	 Eflag, Fflag, Gflag, Hflag, Lflag,
-		 bflag, cflag, hflag, iflag, lflag, mflag, nflag, oflag,
-		 qflag, sflag, vflag, wflag, xflag;
-extern bool	 dexclude, dinclude, fexclude, finclude, lbflag, nullflag, nulldataflag;
-extern unsigned char line_sep;
-extern unsigned long long Aflag, Bflag, mcount;
-extern char	*label;
-extern const char *color;
-extern int	 binbehave, devbehave, dirbehave, filebehave, grepbehave, linkbehave;
-
-extern bool	 notfound;
-extern int	 tail;
-extern unsigned int dpatterns, fpatterns, patterns;
-extern char    **pattern;
-extern struct epat *dpattern, *fpattern;
-extern regex_t	*er_pattern, *r_pattern;
-extern fastgrep_t *fg_pattern;
-
-/* For regex errors  */
-#define RE_ERROR_BUF	512
-extern char	 re_error[RE_ERROR_BUF + 1];	/* Seems big enough */
-
-/* util.c */
-bool	 file_matching(const char *fname);
-int	 procfile(const char *fn);
-int	 grep_tree(char **argv);
-void	*grep_malloc(size_t size);
-void	*grep_calloc(size_t nmemb, size_t size);
-void	*grep_realloc(void *ptr, size_t size);
-char	*grep_strdup(const char *str);
-void	 printline(struct str *line, int sep, regmatch_t *matches, int m);
-
-/* queue.c */
-void	 enqueue(struct str *x);
-void	 printqueue(void);
-void	 clearqueue(void);
-
-/* file.c */
-void		 grep_close(struct file *f);
-struct file	*grep_open(const char *path);
-char		*grep_fgetln(struct file *f, size_t *len);
-
-/* fastgrep.c */
-int		 fastcomp(fastgrep_t *, const char *);
-void		 fgrepcomp(fastgrep_t *, const char *);
-int		 grep_search(fastgrep_t *, const unsigned char *, size_t, regmatch_t *);
diff --git a/toolbox/upstream-netbsd/usr.bin/grep/queue.c b/toolbox/upstream-netbsd/usr.bin/grep/queue.c
deleted file mode 100644
index e3c6be1..0000000
--- a/toolbox/upstream-netbsd/usr.bin/grep/queue.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/*	$NetBSD: queue.c,v 1.5 2011/08/31 16:24:57 plunky Exp $	*/
-/*	$FreeBSD: head/usr.bin/grep/queue.c 211496 2010-08-19 09:28:59Z des $	*/
-/*-
- * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-/*
- * A really poor man's queue.  It does only what it has to and gets out of
- * Dodge.  It is used in place of <sys/queue.h> to get a better performance.
- */
-
-#if HAVE_NBTOOL_CONFIG_H
-#include "nbtool_config.h"
-#endif
-
-#include <sys/cdefs.h>
-__RCSID("$NetBSD: queue.c,v 1.5 2011/08/31 16:24:57 plunky Exp $");
-
-#include <sys/param.h>
-#include <sys/queue.h>
-
-#include <stdlib.h>
-#include <string.h>
-
-#include "grep.h"
-
-struct qentry {
-	STAILQ_ENTRY(qentry)	list;
-	struct str	 	data;
-};
-
-static STAILQ_HEAD(, qentry)	queue = STAILQ_HEAD_INITIALIZER(queue);
-static unsigned long long	count;
-
-static struct qentry	*dequeue(void);
-
-void
-enqueue(struct str *x)
-{
-	struct qentry *item;
-
-	item = grep_malloc(sizeof(struct qentry));
-	item->data.dat = grep_malloc(sizeof(char) * x->len);
-	item->data.len = x->len;
-	item->data.line_no = x->line_no;
-	item->data.off = x->off;
-	memcpy(item->data.dat, x->dat, x->len);
-	item->data.file = x->file;
-
-	STAILQ_INSERT_TAIL(&queue, item, list);
-
-	if (++count > Bflag) {
-		item = dequeue();
-		free(item->data.dat);
-		free(item);
-	}
-}
-
-static struct qentry *
-dequeue(void)
-{
-	struct qentry *item;
-
-	item = STAILQ_FIRST(&queue);
-	if (item == NULL)
-		return (NULL);
-
-	STAILQ_REMOVE_HEAD(&queue, list);
-	--count;
-	return (item);
-}
-
-void
-printqueue(void)
-{
-	struct qentry *item;
-
-	while ((item = dequeue()) != NULL) {
-		printline(&item->data, '-', NULL, 0);
-		free(item->data.dat);
-		free(item);
-	}
-}
-
-void
-clearqueue(void)
-{
-	struct qentry *item;
-
-	while ((item = dequeue()) != NULL) {
-		free(item->data.dat);
-		free(item);
-	}
-}
diff --git a/toolbox/upstream-netbsd/usr.bin/grep/util.c b/toolbox/upstream-netbsd/usr.bin/grep/util.c
deleted file mode 100644
index ecd948d..0000000
--- a/toolbox/upstream-netbsd/usr.bin/grep/util.c
+++ /dev/null
@@ -1,499 +0,0 @@
-/*	$NetBSD: util.c,v 1.17 2013/01/21 03:24:43 msaitoh Exp $	*/
-/*	$FreeBSD: head/usr.bin/grep/util.c 211496 2010-08-19 09:28:59Z des $	*/
-/*	$OpenBSD: util.c,v 1.39 2010/07/02 22:18:03 tedu Exp $	*/
-
-/*-
- * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
- * Copyright (C) 2008-2010 Gabor Kovesdan <gabor@FreeBSD.org>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#if HAVE_NBTOOL_CONFIG_H
-#include "nbtool_config.h"
-#endif
-
-#include <sys/cdefs.h>
-__RCSID("$NetBSD: util.c,v 1.17 2013/01/21 03:24:43 msaitoh Exp $");
-
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include <ctype.h>
-#include <err.h>
-#include <errno.h>
-#include <fnmatch.h>
-#include <fts.h>
-#include <libgen.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <wchar.h>
-#include <wctype.h>
-
-#include "grep.h"
-
-static bool	 first, first_global = true;
-static unsigned long long since_printed;
-
-static int	 procline(struct str *l, int);
-
-bool
-file_matching(const char *fname)
-{
-	char *fname_base, *fname_copy;
-	unsigned int i;
-	bool ret;
-
-	ret = finclude ? false : true;
-	fname_copy = grep_strdup(fname);
-	fname_base = basename(fname_copy);
-
-	for (i = 0; i < fpatterns; ++i) {
-		if (fnmatch(fpattern[i].pat, fname, 0) == 0 ||
-		    fnmatch(fpattern[i].pat, fname_base, 0) == 0) {
-			if (fpattern[i].mode == EXCL_PAT) {
-				free(fname_copy);
-				return (false);
-			} else
-				ret = true;
-		}
-	}
-	free(fname_copy);
-	return (ret);
-}
-
-static inline bool
-dir_matching(const char *dname)
-{
-	unsigned int i;
-	bool ret;
-
-	ret = dinclude ? false : true;
-
-	for (i = 0; i < dpatterns; ++i) {
-		if (dname != NULL &&
-		    fnmatch(dname, dpattern[i].pat, 0) == 0) {
-			if (dpattern[i].mode == EXCL_PAT)
-				return (false);
-			else
-				ret = true;
-		}
-	}
-	return (ret);
-}
-
-/*
- * Processes a directory when a recursive search is performed with
- * the -R option.  Each appropriate file is passed to procfile().
- */
-int
-grep_tree(char **argv)
-{
-	FTS *fts;
-	FTSENT *p;
-	char *d, *dir = NULL;
-	int c, fts_flags;
-	bool ok;
-
-	c = fts_flags = 0;
-
-	switch(linkbehave) {
-	case LINK_EXPLICIT:
-		fts_flags = FTS_COMFOLLOW;
-		break;
-	case LINK_SKIP:
-		fts_flags = FTS_PHYSICAL;
-		break;
-	default:
-		fts_flags = FTS_LOGICAL;
-			
-	}
-
-	fts_flags |= FTS_NOSTAT | FTS_NOCHDIR;
-
-	if (!(fts = fts_open(argv, fts_flags, NULL)))
-		err(2, "fts_open");
-	while ((p = fts_read(fts)) != NULL) {
-		switch (p->fts_info) {
-		case FTS_DNR:
-			/* FALLTHROUGH */
-		case FTS_ERR:
-			errx(2, "%s: %s", p->fts_path, strerror(p->fts_errno));
-			break;
-		case FTS_D:
-			/* FALLTHROUGH */
-		case FTS_DP:
-			break;
-		case FTS_DC:
-			/* Print a warning for recursive directory loop */
-			warnx("warning: %s: recursive directory loop",
-				p->fts_path);
-			break;
-		default:
-			/* Check for file exclusion/inclusion */
-			ok = true;
-			if (dexclude || dinclude) {
-				if ((d = strrchr(p->fts_path, '/')) != NULL) {
-					dir = grep_malloc(sizeof(char) *
-					    (d - p->fts_path + 1));
-					memcpy(dir, p->fts_path,
-					    d - p->fts_path);
-					dir[d - p->fts_path] = '\0';
-				}
-				ok = dir_matching(dir);
-				free(dir);
-				dir = NULL;
-			}
-			if (fexclude || finclude)
-				ok &= file_matching(p->fts_path);
-
-			if (ok)
-				c += procfile(p->fts_path);
-			break;
-		}
-	}
-
-	fts_close(fts);
-	return (c);
-}
-
-/*
- * Opens a file and processes it.  Each file is processed line-by-line
- * passing the lines to procline().
- */
-int
-procfile(const char *fn)
-{
-	struct file *f;
-	struct stat sb;
-	struct str ln;
-	mode_t s;
-	int c, t;
-
-	if (mflag && (mcount <= 0))
-		return (0);
-
-	if (strcmp(fn, "-") == 0) {
-		fn = label != NULL ? label : getstr(1);
-		f = grep_open(NULL);
-	} else {
-		if (!stat(fn, &sb)) {
-			/* Check if we need to process the file */
-			s = sb.st_mode & S_IFMT;
-			if (s == S_IFDIR && dirbehave == DIR_SKIP)
-				return (0);
-			if ((s == S_IFIFO || s == S_IFCHR || s == S_IFBLK
-				|| s == S_IFSOCK) && devbehave == DEV_SKIP)
-					return (0);
-		}
-		f = grep_open(fn);
-	}
-	if (f == NULL) {
-		if (!sflag)
-			warn("%s", fn);
-		if (errno == ENOENT)
-			notfound = true;
-		return (0);
-	}
-
-	ln.file = grep_malloc(strlen(fn) + 1);
-	strcpy(ln.file, fn);
-	ln.line_no = 0;
-	ln.len = 0;
-	tail = 0;
-	ln.off = -1;
-
-	for (first = true, c = 0;  c == 0 || !(lflag || qflag); ) {
-		ln.off += ln.len + 1;
-		if ((ln.dat = grep_fgetln(f, &ln.len)) == NULL || ln.len == 0)
-			break;
-		if (ln.len > 0 && ln.dat[ln.len - 1] == line_sep)
-			--ln.len;
-		ln.line_no++;
-
-		/* Return if we need to skip a binary file */
-		if (f->binary && binbehave == BINFILE_SKIP) {
-			grep_close(f);
-			free(ln.file);
-			free(f);
-			return (0);
-		}
-		/* Process the file line-by-line */
-		t = procline(&ln, f->binary);
-		c += t;
-
-		/* Count the matches if we have a match limit */
-		if (mflag) {
-			mcount -= t;
-			if (mcount <= 0)
-				break;
-		}
-	}
-	if (Bflag > 0)
-		clearqueue();
-	grep_close(f);
-
-	if (cflag) {
-		if (!hflag)
-			printf("%s:", ln.file);
-		printf("%u%c", c, line_sep);
-	}
-	if (lflag && !qflag && c != 0)
-		printf("%s%c", fn, line_sep);
-	if (Lflag && !qflag && c == 0)
-		printf("%s%c", fn, line_sep);
-	if (c && !cflag && !lflag && !Lflag &&
-	    binbehave == BINFILE_BIN && f->binary && !qflag)
-		printf(getstr(8), fn);
-
-	free(ln.file);
-	free(f);
-	return (c);
-}
-
-#define iswword(x)	(iswalnum((x)) || (x) == L'_')
-
-/*
- * Processes a line comparing it with the specified patterns.  Each pattern
- * is looped to be compared along with the full string, saving each and every
- * match, which is necessary to colorize the output and to count the
- * matches.  The matching lines are passed to printline() to display the
- * appropriate output.
- */
-static int
-procline(struct str *l, int nottext)
-{
-	regmatch_t matches[MAX_LINE_MATCHES];
-	regmatch_t pmatch;
-	size_t st = 0;
-	unsigned int i;
-	int c = 0, m = 0, r = 0;
-
-	/* Loop to process the whole line */
-	while (st <= l->len) {
-		pmatch.rm_so = st;
-		pmatch.rm_eo = l->len;
-
-		/* Loop to compare with all the patterns */
-		for (i = 0; i < patterns; i++) {
-/*
- * XXX: grep_search() is a workaround for speed up and should be
- * removed in the future.  See fastgrep.c.
- */
-			if (fg_pattern[i].pattern) {
-				r = grep_search(&fg_pattern[i],
-				    (unsigned char *)l->dat,
-				    l->len, &pmatch);
-				r = (r == 0) ? 0 : REG_NOMATCH;
-				st = pmatch.rm_eo;
-			} else {
-				r = regexec(&r_pattern[i], l->dat, 1,
-				    &pmatch, eflags);
-				r = (r == 0) ? 0 : REG_NOMATCH;
-				st = pmatch.rm_eo;
-			}
-			if (r == REG_NOMATCH)
-				continue;
-			/* Check for full match */
-			if (xflag &&
-			    (pmatch.rm_so != 0 ||
-			     (size_t)pmatch.rm_eo != l->len))
-				continue;
-			/* Check for whole word match */
-			if (fg_pattern[i].word && pmatch.rm_so != 0) {
-				wchar_t wbegin, wend;
-
-				wbegin = wend = L' ';
-				if (pmatch.rm_so != 0 &&
-				    sscanf(&l->dat[pmatch.rm_so - 1],
-				    "%lc", &wbegin) != 1)
-					continue;
-				if ((size_t)pmatch.rm_eo != l->len &&
-				    sscanf(&l->dat[pmatch.rm_eo],
-				    "%lc", &wend) != 1)
-					continue;
-				if (iswword(wbegin) || iswword(wend))
-					continue;
-			}
-			c = 1;
-			if (m < MAX_LINE_MATCHES)
-				matches[m++] = pmatch;
-			/* matches - skip further patterns */
-			if ((color != NULL && !oflag) || qflag || lflag)
-				break;
-		}
-
-		if (vflag) {
-			c = !c;
-			break;
-		}
-		/* One pass if we are not recording matches */
-		if ((color != NULL && !oflag) || qflag || lflag)
-			break;
-
-		if (st == (size_t)pmatch.rm_so)
-			break; 	/* No matches */
-	}
-
-	if (c && binbehave == BINFILE_BIN && nottext)
-		return (c); /* Binary file */
-
-	/* Dealing with the context */
-	if ((tail || c) && !cflag && !qflag && !lflag && !Lflag) {
-		if (c) {
-			if ((Aflag || Bflag) && !first_global &&
-			    (first || since_printed > Bflag))
-				printf("--\n");
-			tail = Aflag;
-			if (Bflag > 0)
-				printqueue();
-			printline(l, ':', matches, m);
-		} else {
-			printline(l, '-', matches, m);
-			tail--;
-		}
-		first = false;
-		first_global = false;
-		since_printed = 0;
-	} else {
-		if (Bflag)
-			enqueue(l);
-		since_printed++;
-	}
-	return (c);
-}
-
-/*
- * Safe malloc() for internal use.
- */
-void *
-grep_malloc(size_t size)
-{
-	void *ptr;
-
-	if ((ptr = malloc(size)) == NULL)
-		err(2, "malloc");
-	return (ptr);
-}
-
-/*
- * Safe calloc() for internal use.
- */
-void *
-grep_calloc(size_t nmemb, size_t size)
-{
-	void *ptr;
-
-	if ((ptr = calloc(nmemb, size)) == NULL)
-		err(2, "calloc");
-	return (ptr);
-}
-
-/*
- * Safe realloc() for internal use.
- */
-void *
-grep_realloc(void *ptr, size_t size)
-{
-
-	if ((ptr = realloc(ptr, size)) == NULL)
-		err(2, "realloc");
-	return (ptr);
-}
-
-/*
- * Safe strdup() for internal use.
- */
-char *
-grep_strdup(const char *str)
-{
-	char *ret;
-
-	if ((ret = strdup(str)) == NULL)
-		err(2, "strdup");
-	return (ret);
-}
-
-/*
- * Prints a matching line according to the command line options.
- */
-void
-printline(struct str *line, int sep, regmatch_t *matches, int m)
-{
-	size_t a = 0;
-	int i, n = 0;
-
-	if (!hflag) {
-		if (nullflag == 0)
-			fputs(line->file, stdout);
-		else {
-			printf("%s", line->file);
-			putchar(0);
-		}
-		++n;
-	}
-	if (nflag) {
-		if (n > 0)
-			putchar(sep);
-		printf("%d", line->line_no);
-		++n;
-	}
-	if (bflag) {
-		if (n > 0)
-			putchar(sep);
-		printf("%lld", (long long)line->off);
-		++n;
-	}
-	if (n)
-		putchar(sep);
-	/* --color and -o */
-	if ((oflag || color) && m > 0) {
-		for (i = 0; i < m; i++) {
-			if (!oflag)
-				fwrite(line->dat + a, matches[i].rm_so - a, 1,
-				    stdout);
-			if (color) 
-				fprintf(stdout, "\33[%sm\33[K", color);
-
-				fwrite(line->dat + matches[i].rm_so, 
-				    matches[i].rm_eo - matches[i].rm_so, 1,
-				    stdout);
-			if (color) 
-				fprintf(stdout, "\33[m\33[K");
-			a = matches[i].rm_eo;
-			if (oflag)
-				putchar('\n');
-		}
-		if (!oflag) {
-			if (line->len - a > 0)
-				fwrite(line->dat + a, line->len - a, 1, stdout);
-			putchar(line_sep);
-		}
-	} else {
-		fwrite(line->dat, line->len, 1, stdout);
-		putchar(line_sep);
-	}
-}