diff --git a/adb/Android.bp b/adb/Android.bp
index 3685687..1469e77 100644
--- a/adb/Android.bp
+++ b/adb/Android.bp
@@ -142,6 +142,8 @@
         "client/fastdeploycallbacks.cpp",
     ],
 
+    generated_headers: ["platform_tools_version"],
+
     target: {
         linux: {
             srcs: ["client/usb_linux.cpp"],
@@ -311,6 +313,8 @@
         "daemon/include",
     ],
 
+    generated_headers: ["platform_tools_version"],
+
     static_libs: [
         "libdiagnose_usb",
         "libqemu_pipe",
diff --git a/adb/adb.cpp b/adb/adb.cpp
index 8e028f4..791899e 100644
--- a/adb/adb.cpp
+++ b/adb/adb.cpp
@@ -45,6 +45,7 @@
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <build/version.h>
+#include <platform_tools_version.h>
 
 #include "adb_auth.h"
 #include "adb_io.h"
@@ -65,10 +66,11 @@
     // Don't change the format of this --- it's parsed by ddmlib.
     return android::base::StringPrintf(
         "Android Debug Bridge version %d.%d.%d\n"
-        "Version %s\n"
+        "Version %s-%s\n"
         "Installed as %s\n",
         ADB_VERSION_MAJOR, ADB_VERSION_MINOR, ADB_SERVER_VERSION,
-        android::build::GetBuildNumber().c_str(), android::base::GetExecutablePath().c_str());
+        PLATFORM_TOOLS_VERSION, android::build::GetBuildNumber().c_str(),
+        android::base::GetExecutablePath().c_str());
 }
 
 void fatal(const char *fmt, ...) {
diff --git a/adb/client/main.cpp b/adb/client/main.cpp
index 095ad98..a7e454d 100644
--- a/adb/client/main.cpp
+++ b/adb/client/main.cpp
@@ -56,15 +56,6 @@
     LOG(INFO) << adb_version();
 }
 
-#if defined(_WIN32)
-static BOOL WINAPI ctrlc_handler(DWORD type) {
-    // TODO: Consider trying to kill a starting up adb server (if we're in
-    // launch_server) by calling GenerateConsoleCtrlEvent().
-    exit(STATUS_CONTROL_C_EXIT);
-    return TRUE;
-}
-#endif
-
 void adb_server_cleanup() {
     // Upon exit, we want to clean up in the following order:
     //   1. close_smartsockets, so that we don't get any new clients
@@ -97,12 +88,16 @@
         }
     }
 
-    SetConsoleCtrlHandler(ctrlc_handler, TRUE);
-#else
+    // TODO: On Ctrl-C, consider trying to kill a starting up adb server (if we're in
+    // launch_server) by calling GenerateConsoleCtrlEvent().
+
+    // On Windows, SIGBREAK is when Ctrl-Break is pressed or the console window is closed. It should
+    // act like Ctrl-C.
+    signal(SIGBREAK, [](int) { raise(SIGINT); });
+#endif
     signal(SIGINT, [](int) {
         fdevent_run_on_main_thread([]() { exit(0); });
     });
-#endif
 
     char* leak = getenv("ADB_LEAK");
     if (leak && strcmp(leak, "1") == 0) {
diff --git a/adb/client/usb_linux.cpp b/adb/client/usb_linux.cpp
index 869e858..f1bf559 100644
--- a/adb/client/usb_linux.cpp
+++ b/adb/client/usb_linux.cpp
@@ -30,6 +30,7 @@
 #include <string.h>
 #include <sys/ioctl.h>
 #include <sys/time.h>
+#include <sys/sysmacros.h>
 #include <sys/types.h>
 #include <unistd.h>
 
diff --git a/adb/transport.cpp b/adb/transport.cpp
index 332e0f8..239403a 100644
--- a/adb/transport.cpp
+++ b/adb/transport.cpp
@@ -220,25 +220,34 @@
         }
         D("attempting to reconnect %s", attempt.transport->serial.c_str());
 
-        if (!attempt.transport->Reconnect()) {
-            D("attempting to reconnect %s failed.", attempt.transport->serial.c_str());
-            if (attempt.attempts_left == 0) {
-                D("transport %s exceeded the number of retry attempts. giving up on it.",
-                  attempt.transport->serial.c_str());
-                remove_transport(attempt.transport);
+        switch (attempt.transport->Reconnect()) {
+            case ReconnectResult::Retry: {
+                D("attempting to reconnect %s failed.", attempt.transport->serial.c_str());
+                if (attempt.attempts_left == 0) {
+                    D("transport %s exceeded the number of retry attempts. giving up on it.",
+                      attempt.transport->serial.c_str());
+                    remove_transport(attempt.transport);
+                    continue;
+                }
+
+                std::lock_guard<std::mutex> lock(reconnect_mutex_);
+                reconnect_queue_.emplace(ReconnectAttempt{
+                        attempt.transport,
+                        std::chrono::steady_clock::now() + ReconnectHandler::kDefaultTimeout,
+                        attempt.attempts_left - 1});
                 continue;
             }
 
-            std::lock_guard<std::mutex> lock(reconnect_mutex_);
-            reconnect_queue_.emplace(ReconnectAttempt{
-                    attempt.transport,
-                    std::chrono::steady_clock::now() + ReconnectHandler::kDefaultTimeout,
-                    attempt.attempts_left - 1});
-            continue;
-        }
+            case ReconnectResult::Success:
+                D("reconnection to %s succeeded.", attempt.transport->serial.c_str());
+                register_transport(attempt.transport);
+                continue;
 
-        D("reconnection to %s succeeded.", attempt.transport->serial.c_str());
-        register_transport(attempt.transport);
+            case ReconnectResult::Abort:
+                D("cancelling reconnection attempt to %s.", attempt.transport->serial.c_str());
+                remove_transport(attempt.transport);
+                continue;
+        }
     }
 }
 
@@ -1128,7 +1137,7 @@
     connection_waitable_->SetConnectionEstablished(success);
 }
 
-bool atransport::Reconnect() {
+ReconnectResult atransport::Reconnect() {
     return reconnect_(this);
 }
 
diff --git a/adb/transport.h b/adb/transport.h
index f362f24..f854ce5 100644
--- a/adb/transport.h
+++ b/adb/transport.h
@@ -193,6 +193,12 @@
     DISALLOW_COPY_AND_ASSIGN(ConnectionWaitable);
 };
 
+enum class ReconnectResult {
+    Retry,
+    Success,
+    Abort,
+};
+
 class atransport {
   public:
     // TODO(danalbert): We expose waaaaaaay too much stuff because this was
@@ -200,7 +206,7 @@
     // class in one go is a very large change. Given how bad our testing is,
     // it's better to do this piece by piece.
 
-    using ReconnectCallback = std::function<bool(atransport*)>;
+    using ReconnectCallback = std::function<ReconnectResult(atransport*)>;
 
     atransport(ReconnectCallback reconnect, ConnectionState state)
         : id(NextTransportId()),
@@ -215,7 +221,7 @@
         max_payload = MAX_PAYLOAD;
     }
     atransport(ConnectionState state = kCsOffline)
-        : atransport([](atransport*) { return false; }, state) {}
+        : atransport([](atransport*) { return ReconnectResult::Abort; }, state) {}
     virtual ~atransport();
 
     int Write(apacket* p);
@@ -295,9 +301,8 @@
     // 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();
+    // Attempts to reconnect with the underlying Connection.
+    ReconnectResult Reconnect();
 
   private:
     std::atomic<bool> kicked_;
diff --git a/adb/transport_local.cpp b/adb/transport_local.cpp
index 8b8fd51..4fd483b 100644
--- a/adb/transport_local.cpp
+++ b/adb/transport_local.cpp
@@ -117,14 +117,15 @@
         std::tie(fd, port, serial) = tcp_connect(address, &response);
         if (fd == -1) {
             D("reconnect failed: %s", response.c_str());
-            return false;
+            return ReconnectResult::Retry;
         }
 
         // 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, std::move(fd), port, 0) >= 0;
+        return init_socket_transport(t, std::move(fd), port, 0) >= 0 ? ReconnectResult::Success
+                                                                     : ReconnectResult::Retry;
     };
 
     int error;
@@ -166,7 +167,7 @@
         disable_tcp_nagle(fd.get());
         std::string serial = getEmulatorSerialString(console_port);
         if (register_socket_transport(std::move(fd), std::move(serial), adb_port, 1,
-                                      [](atransport*) { return false; })) {
+                                      [](atransport*) { return ReconnectResult::Abort; })) {
             return 0;
         }
     }
@@ -269,7 +270,7 @@
             disable_tcp_nagle(fd.get());
             std::string serial = android::base::StringPrintf("host-%d", fd.get());
             register_socket_transport(std::move(fd), std::move(serial), port, 1,
-                                      [](atransport*) { return false; });
+                                      [](atransport*) { return ReconnectResult::Abort; });
         }
     }
     D("transport: server_socket_thread() exiting");
@@ -366,7 +367,7 @@
                 std::string serial = android::base::StringPrintf("host-%d", fd.get());
                 WriteFdExactly(fd.get(), _start_req, strlen(_start_req));
                 register_socket_transport(std::move(fd), std::move(serial), port, 1,
-                                          [](atransport*) { return false; });
+                                          [](atransport*) { return ReconnectResult::Abort; });
             }
 
             /* Prepare for accepting of the next ADB host connection. */
diff --git a/base/include/android-base/parseint.h b/base/include/android-base/parseint.h
index 5bfa47e..9444fdd 100644
--- a/base/include/android-base/parseint.h
+++ b/base/include/android-base/parseint.h
@@ -38,6 +38,7 @@
   }
 
   if (s[0] == '-') {
+    errno = EINVAL;
     return false;
   }
 
@@ -45,14 +46,22 @@
   errno = 0;
   char* end;
   unsigned long long int result = strtoull(s, &end, base);
-  if (errno != 0 || end == s) return false;
+  if (errno != 0) return false;
+  if (end == s) {
+    errno = EINVAL;
+    return false;
+  }
   if (*end != '\0') {
     const char* suffixes = "bkmgtpe";
     const char* suffix;
-    if (!allow_suffixes || (suffix = strchr(suffixes, tolower(*end))) == nullptr) return false;
-    if (__builtin_mul_overflow(result, 1ULL << (10 * (suffix - suffixes)), &result)) return false;
+    if ((!allow_suffixes || (suffix = strchr(suffixes, tolower(*end))) == nullptr) ||
+        __builtin_mul_overflow(result, 1ULL << (10 * (suffix - suffixes)), &result)) {
+      errno = EINVAL;
+      return false;
+    }
   }
   if (max < result) {
+    errno = ERANGE;
     return false;
   }
   if (out != nullptr) {
@@ -95,10 +104,15 @@
   errno = 0;
   char* end;
   long long int result = strtoll(s, &end, base);
-  if (errno != 0 || s == end || *end != '\0') {
+  if (errno != 0) {
+    return false;
+  }
+  if (s == end || *end != '\0') {
+    errno = EINVAL;
     return false;
   }
   if (result < min || max < result) {
+    errno = ERANGE;
     return false;
   }
   if (out != nullptr) {
diff --git a/base/parseint_test.cpp b/base/parseint_test.cpp
index b8cf654..e449c33 100644
--- a/base/parseint_test.cpp
+++ b/base/parseint_test.cpp
@@ -16,15 +16,22 @@
 
 #include "android-base/parseint.h"
 
+#include <errno.h>
+
 #include <gtest/gtest.h>
 
 TEST(parseint, signed_smoke) {
+  errno = 0;
   int i = 0;
   ASSERT_FALSE(android::base::ParseInt("x", &i));
+  ASSERT_EQ(EINVAL, errno);
+  errno = 0;
   ASSERT_FALSE(android::base::ParseInt("123x", &i));
+  ASSERT_EQ(EINVAL, errno);
 
   ASSERT_TRUE(android::base::ParseInt("123", &i));
   ASSERT_EQ(123, i);
+  ASSERT_EQ(0, errno);
   i = 0;
   EXPECT_TRUE(android::base::ParseInt("  123", &i));
   EXPECT_EQ(123, i);
@@ -40,26 +47,43 @@
 
   ASSERT_TRUE(android::base::ParseInt("12", &i, 0, 15));
   ASSERT_EQ(12, i);
+  errno = 0;
   ASSERT_FALSE(android::base::ParseInt("-12", &i, 0, 15));
+  ASSERT_EQ(ERANGE, errno);
+  errno = 0;
   ASSERT_FALSE(android::base::ParseInt("16", &i, 0, 15));
+  ASSERT_EQ(ERANGE, errno);
 
+  errno = 0;
   ASSERT_FALSE(android::base::ParseInt<int>("x", nullptr));
+  ASSERT_EQ(EINVAL, errno);
+  errno = 0;
   ASSERT_FALSE(android::base::ParseInt<int>("123x", nullptr));
+  ASSERT_EQ(EINVAL, errno);
   ASSERT_TRUE(android::base::ParseInt<int>("1234", nullptr));
 }
 
 TEST(parseint, unsigned_smoke) {
+  errno = 0;
   unsigned int i = 0u;
   ASSERT_FALSE(android::base::ParseUint("x", &i));
+  ASSERT_EQ(EINVAL, errno);
+  errno = 0;
   ASSERT_FALSE(android::base::ParseUint("123x", &i));
+  ASSERT_EQ(EINVAL, errno);
 
   ASSERT_TRUE(android::base::ParseUint("123", &i));
   ASSERT_EQ(123u, i);
+  ASSERT_EQ(0, errno);
   i = 0u;
   EXPECT_TRUE(android::base::ParseUint("  123", &i));
   EXPECT_EQ(123u, i);
+  errno = 0;
   ASSERT_FALSE(android::base::ParseUint("-123", &i));
+  EXPECT_EQ(EINVAL, errno);
+  errno = 0;
   EXPECT_FALSE(android::base::ParseUint("  -123", &i));
+  EXPECT_EQ(EINVAL, errno);
 
   unsigned short s = 0u;
   ASSERT_TRUE(android::base::ParseUint("1234", &s));
@@ -67,16 +91,28 @@
 
   ASSERT_TRUE(android::base::ParseUint("12", &i, 15u));
   ASSERT_EQ(12u, i);
+  errno = 0;
   ASSERT_FALSE(android::base::ParseUint("-12", &i, 15u));
+  ASSERT_EQ(EINVAL, errno);
+  errno = 0;
   ASSERT_FALSE(android::base::ParseUint("16", &i, 15u));
+  ASSERT_EQ(ERANGE, errno);
 
+  errno = 0;
   ASSERT_FALSE(android::base::ParseUint<unsigned short>("x", nullptr));
+  ASSERT_EQ(EINVAL, errno);
+  errno = 0;
   ASSERT_FALSE(android::base::ParseUint<unsigned short>("123x", nullptr));
+  ASSERT_EQ(EINVAL, errno);
   ASSERT_TRUE(android::base::ParseUint<unsigned short>("1234", nullptr));
 
+  errno = 0;
   unsigned long long int lli;
   EXPECT_FALSE(android::base::ParseUint("-123", &lli));
+  EXPECT_EQ(EINVAL, errno);
+  errno = 0;
   EXPECT_FALSE(android::base::ParseUint("  -123", &lli));
+  EXPECT_EQ(EINVAL, errno);
 }
 
 TEST(parseint, no_implicit_octal) {
diff --git a/debuggerd/debuggerd_test.cpp b/debuggerd/debuggerd_test.cpp
index dfb7a6a..e2ea480 100644
--- a/debuggerd/debuggerd_test.cpp
+++ b/debuggerd/debuggerd_test.cpp
@@ -29,6 +29,7 @@
 #include <regex>
 #include <thread>
 
+#include <android/fdsan.h>
 #include <android/set_abort_message.h>
 
 #include <android-base/file.h>
@@ -801,6 +802,31 @@
   AssertDeath(SIGABRT);
 }
 
+TEST_F(CrasherTest, fdsan_warning_abort_message) {
+  int intercept_result;
+  unique_fd output_fd;
+
+  StartProcess([]() {
+    android_fdsan_set_error_level(ANDROID_FDSAN_ERROR_LEVEL_WARN_ONCE);
+    unique_fd fd(open("/dev/null", O_RDONLY | O_CLOEXEC));
+    if (fd == -1) {
+      abort();
+    }
+    close(fd.get());
+    _exit(0);
+  });
+
+  StartIntercept(&output_fd);
+  FinishCrasher();
+  AssertDeath(0);
+  FinishIntercept(&intercept_result);
+  ASSERT_EQ(1, intercept_result) << "tombstoned reported failure";
+
+  std::string result;
+  ConsumeFd(std::move(output_fd), &result);
+  ASSERT_MATCH(result, "Abort message: 'attempted to close");
+}
+
 TEST(crash_dump, zombie) {
   pid_t forkpid = fork();
 
diff --git a/debuggerd/handler/debuggerd_handler.cpp b/debuggerd/handler/debuggerd_handler.cpp
index 91e6f71..15557b6 100644
--- a/debuggerd/handler/debuggerd_handler.cpp
+++ b/debuggerd/handler/debuggerd_handler.cpp
@@ -457,14 +457,14 @@
     info = nullptr;
   }
 
-  struct siginfo si = {};
+  struct siginfo dummy_info = {};
   if (!info) {
-    memset(&si, 0, sizeof(si));
-    si.si_signo = signal_number;
-    si.si_code = SI_USER;
-    si.si_pid = __getpid();
-    si.si_uid = getuid();
-    info = &si;
+    memset(&dummy_info, 0, sizeof(dummy_info));
+    dummy_info.si_signo = signal_number;
+    dummy_info.si_code = SI_USER;
+    dummy_info.si_pid = __getpid();
+    dummy_info.si_uid = getuid();
+    info = &dummy_info;
   } else if (info->si_code >= 0 || info->si_code == SI_TKILL) {
     // rt_tgsigqueueinfo(2)'s documentation appears to be incorrect on kernels
     // that contain commit 66dd34a (3.9+). The manpage claims to only allow
@@ -473,8 +473,18 @@
   }
 
   void* abort_message = nullptr;
-  if (signal_number != DEBUGGER_SIGNAL && g_callbacks.get_abort_message) {
-    abort_message = g_callbacks.get_abort_message();
+  if (signal_number == DEBUGGER_SIGNAL) {
+    if (info->si_code == SI_QUEUE && info->si_pid == __getpid()) {
+      // Allow for the abort message to be explicitly specified via the sigqueue value.
+      // Keep the bottom bit intact for representing whether we want a backtrace or a tombstone.
+      uintptr_t value = reinterpret_cast<uintptr_t>(info->si_ptr);
+      abort_message = reinterpret_cast<void*>(value & ~1);
+      info->si_ptr = reinterpret_cast<void*>(value & 1);
+    }
+  } else {
+    if (g_callbacks.get_abort_message) {
+      abort_message = g_callbacks.get_abort_message();
+    }
   }
 
   // If sival_int is ~0, it means that the fallback handler has been called
diff --git a/debuggerd/libdebuggerd/open_files_list.cpp b/debuggerd/libdebuggerd/open_files_list.cpp
index 03e4e8e..743a2e7 100644
--- a/debuggerd/libdebuggerd/open_files_list.cpp
+++ b/debuggerd/libdebuggerd/open_files_list.cpp
@@ -18,6 +18,7 @@
 
 #include "libdebuggerd/open_files_list.h"
 
+#include <android/fdsan.h>
 #include <dirent.h>
 #include <errno.h>
 #include <stdio.h>
@@ -122,8 +123,10 @@
     const std::optional<std::string>& path = entry.path;
     const std::optional<uint64_t>& fdsan_owner = entry.fdsan_owner;
     if (path && fdsan_owner) {
-      _LOG(log, logtype::OPEN_FILES, "%sfd %i: %s (owned by %#" PRIx64 ")\n", prefix, fd,
-           path->c_str(), *fdsan_owner);
+      const char* type = android_fdsan_get_tag_type(*fdsan_owner);
+      uint64_t value = android_fdsan_get_tag_value(*fdsan_owner);
+      _LOG(log, logtype::OPEN_FILES, "%sfd %i: %s (owned by %s %#" PRIx64 ")\n", prefix, fd,
+           path->c_str(), type, value);
     } else if (path && !fdsan_owner) {
       _LOG(log, logtype::OPEN_FILES, "%sfd %i: %s (unowned)\n", prefix, fd, path->c_str());
     } else if (!path && fdsan_owner) {
diff --git a/fastboot/Android.bp b/fastboot/Android.bp
index f32b5d5..3b91ddd 100644
--- a/fastboot/Android.bp
+++ b/fastboot/Android.bp
@@ -21,67 +21,66 @@
 
     compile_multilib: "first",
     srcs: [
-      "bootimg_utils.cpp",
-      "fs.cpp",
-      "socket.cpp",
-      "tcp.cpp",
-      "udp.cpp",
-      "util.cpp",
-      "fastboot_driver.cpp",
+        "bootimg_utils.cpp",
+        "fs.cpp",
+        "socket.cpp",
+        "tcp.cpp",
+        "udp.cpp",
+        "util.cpp",
+        "fastboot_driver.cpp",
     ],
 
     static_libs: [
-      "libziparchive",
-      "libsparse",
-      "libutils",
-      "liblog",
-      "libz",
-      "libdiagnose_usb",
-      "libbase",
-      "libcutils",
-      "libgtest",
-      "libgtest_main",
-      "libbase",
-      "libadb_host"
+        "libziparchive",
+        "libsparse",
+        "libutils",
+        "liblog",
+        "libz",
+        "libdiagnose_usb",
+        "libbase",
+        "libcutils",
+        "libgtest",
+        "libgtest_main",
+        "libbase",
+        "libadb_host",
     ],
 
     header_libs: [
-      "bootimg_headers"
+        "bootimg_headers",
     ],
 
     export_header_lib_headers: [
-      "bootimg_headers"
+        "bootimg_headers",
     ],
 
-
     target: {
-      linux: {
-        srcs: ["usb_linux.cpp"],
-      },
+        linux: {
+            srcs: ["usb_linux.cpp"],
+        },
 
-      darwin: {
-        srcs: ["usb_osx.cpp"],
+        darwin: {
+            srcs: ["usb_osx.cpp"],
 
-        host_ldlibs: [
-            "-framework CoreFoundation",
-            "-framework IOKit",
-        ],
-      },
+            host_ldlibs: [
+                "-framework CoreFoundation",
+                "-framework IOKit",
+            ],
+        },
 
-      windows: {
-        srcs: ["usb_windows.cpp"],
+        windows: {
+            srcs: ["usb_windows.cpp"],
 
-        host_ldlibs: [
-            "-lws2_32",
-        ],
-      },
+            host_ldlibs: [
+                "-lws2_32",
+            ],
+        },
     },
 
     cflags: [
-      "-Wall",
-      "-Wextra",
-      "-Werror",
-      "-Wunreachable-code",
+        "-Wall",
+        "-Wextra",
+        "-Werror",
+        "-Wunreachable-code",
     ],
 
     export_include_dirs: ["."],
@@ -141,3 +140,154 @@
 
     cpp_std: "c++17",
 }
+
+cc_defaults {
+    name: "fastboot_host_defaults",
+
+    use_version_lib: true,
+
+    cflags: [
+        "-Wall",
+        "-Wextra",
+        "-Werror",
+        "-Wunreachable-code",
+    ],
+
+    target: {
+        darwin: {
+            cflags: ["-Wno-unused-parameter"],
+            host_ldlibs: [
+                "-lpthread",
+                "-framework CoreFoundation",
+                "-framework IOKit",
+            ],
+        },
+        windows: {
+            enabled: true,
+
+            host_ldlibs: ["-lws2_32"],
+        },
+    },
+
+    stl: "libc++_static",
+
+    // 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.
+    shared_libs: [],
+
+    header_libs: ["bootimg_headers"],
+    static_libs: [
+        "libziparchive",
+        "libsparse",
+        "libutils",
+        "liblog",
+        "libz",
+        "libdiagnose_usb",
+        "libbase",
+        "libcutils",
+        "libgtest_host",
+    ],
+}
+
+//
+// Build host libfastboot.
+//
+
+cc_library_host_static {
+    name: "libfastboot",
+    defaults: ["fastboot_host_defaults"],
+
+    cpp_std: "c++17",
+    srcs: [
+        "bootimg_utils.cpp",
+        "engine.cpp",
+        "fastboot.cpp",
+        "fs.cpp",
+        "socket.cpp",
+        "tcp.cpp",
+        "udp.cpp",
+        "util.cpp",
+        "fastboot_driver.cpp",
+    ],
+
+    // Only version the final binaries
+    use_version_lib: false,
+    static_libs: ["libbuildversion"],
+
+    generated_headers: ["platform_tools_version"],
+
+    target: {
+        windows: {
+            srcs: ["usb_windows.cpp"],
+
+            include_dirs: ["development/host/windows/usb/api"],
+        },
+        darwin: {
+            srcs: ["usb_osx.cpp"],
+        },
+        linux_glibc: {
+            srcs: ["usb_linux.cpp"],
+        },
+    },
+}
+
+//
+// Build host fastboot / fastboot.exe
+//
+
+cc_binary_host {
+    name: "fastboot",
+    defaults: ["fastboot_host_defaults"],
+
+    srcs: ["main.cpp"],
+    static_libs: ["libfastboot"],
+
+    required: [
+        "mke2fs",
+        "make_f2fs",
+    ],
+
+    target: {
+        not_windows: {
+            required: [
+                "e2fsdroid",
+                "mke2fs.conf",
+                "sload_f2fs",
+            ],
+        },
+        windows: {
+            required: ["AdbWinUsbApi"],
+            shared_libs: ["AdbWinApi"],
+        },
+    },
+}
+
+//
+// Build host fastboot_test.
+//
+
+cc_test_host {
+    name: "fastboot_test",
+    defaults: ["fastboot_host_defaults"],
+
+    srcs: [
+        "fastboot_test.cpp",
+        "socket_mock.cpp",
+        "socket_test.cpp",
+        "tcp_test.cpp",
+        "udp_test.cpp",
+    ],
+
+    static_libs: ["libfastboot"],
+
+    target: {
+        windows: {
+            shared_libs: ["AdbWinApi"],
+        },
+        windows_x86_64: {
+            // Avoid trying to build for win64
+            enabled: false,
+        },
+    },
+}
diff --git a/fastboot/Android.mk b/fastboot/Android.mk
index 7da0a9f..e4c1317 100644
--- a/fastboot/Android.mk
+++ b/fastboot/Android.mk
@@ -14,89 +14,6 @@
 
 LOCAL_PATH:= $(call my-dir)
 
-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_MODULE := libfastboot
-LOCAL_MODULE_HOST_OS := darwin linux windows
-
-LOCAL_SRC_FILES := \
-    bootimg_utils.cpp \
-    engine.cpp \
-    fastboot.cpp \
-    fs.cpp \
-    socket.cpp \
-    tcp.cpp \
-    udp.cpp \
-    util.cpp \
-    fastboot_driver.cpp \
-
-LOCAL_SRC_FILES_darwin := usb_osx.cpp
-LOCAL_SRC_FILES_linux := usb_linux.cpp
-LOCAL_SRC_FILES_windows := usb_windows.cpp
-
-LOCAL_C_INCLUDES_windows := development/host/windows/usb/api
-LOCAL_CFLAGS := $(fastboot_cflags)
-LOCAL_CFLAGS_darwin := $(fastboot_cflags_darwin)
-LOCAL_CPP_STD := c++17
-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)
-
-#
-# Build host fastboot / fastboot.exe
-#
-
-include $(CLEAR_VARS)
-LOCAL_MODULE := fastboot
-LOCAL_MODULE_HOST_OS := darwin linux windows
-
-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)
-
 #
 # Package fastboot-related executables.
 #
@@ -111,30 +28,3 @@
 $(call dist-for-goals,dist_files sdk win_sdk,$(ALL_MODULES.host_cross_fastboot.BUILT))
 endif
 my_dist_files :=
-
-#
-# Build host 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 := \
-    fastboot_test.cpp \
-    socket_mock.cpp \
-    socket_test.cpp \
-    tcp_test.cpp \
-    udp_test.cpp \
-
-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/README.md b/fastboot/README.md
index 15b5965..c224448 100644
--- a/fastboot/README.md
+++ b/fastboot/README.md
@@ -136,10 +136,6 @@
                        should not support "upload" unless it supports an
                        oem command that requires "upload" capabilities.
 
-    verify:%08x        Send a digital signature to verify the downloaded
-                       data.  Required if the bootloader is "secure"
-                       otherwise "flash" and "boot" will be ignored.
-
     flash:%s           Write the previously downloaded image to the
                        named partition (if possible).
 
@@ -159,8 +155,6 @@
                        the bootloader and then upgrading other partitions
                        using the new bootloader.
 
-    powerdown          Power off the device.
-
 
 
 ## Client Variables
diff --git a/fastboot/constants.h b/fastboot/constants.h
index 6542b83..063cd40 100644
--- a/fastboot/constants.h
+++ b/fastboot/constants.h
@@ -18,7 +18,6 @@
 #define FB_CMD_GETVAR "getvar"
 #define FB_CMD_DOWNLOAD "download"
 #define FB_CMD_UPLOAD "upload"
-#define FB_CMD_VERIFY "verify"
 #define FB_CMD_FLASH "flash"
 #define FB_CMD_ERASE "erase"
 #define FB_CMD_BOOT "boot"
@@ -29,7 +28,6 @@
 #define FB_CMD_REBOOT_BOOTLOADER "reboot-bootloader"
 #define FB_CMD_REBOOT_RECOVERY "reboot-recovery"
 #define FB_CMD_REBOOT_FASTBOOT "reboot-fastboot"
-#define FB_CMD_POWERDOWN "powerdown"
 #define FB_CMD_CREATE_PARTITION "create-logical-partition"
 #define FB_CMD_DELETE_PARTITION "delete-logical-partition"
 #define FB_CMD_RESIZE_PARTITION "resize-logical-partition"
diff --git a/fastboot/device/commands.cpp b/fastboot/device/commands.cpp
index 1e853bf..b1c2958 100644
--- a/fastboot/device/commands.cpp
+++ b/fastboot/device/commands.cpp
@@ -42,34 +42,79 @@
 using ::android::hardware::boot::V1_0::Slot;
 using namespace android::fs_mgr;
 
+struct VariableHandlers {
+    // Callback to retrieve the value of a single variable.
+    std::function<bool(FastbootDevice*, const std::vector<std::string>&, std::string*)> get;
+    // Callback to retrieve all possible argument combinations, for getvar all.
+    std::function<std::vector<std::vector<std::string>>(FastbootDevice*)> get_all_args;
+};
+
+static void GetAllVars(FastbootDevice* device, const std::string& name,
+                       const VariableHandlers& handlers) {
+    if (!handlers.get_all_args) {
+        std::string message;
+        if (!handlers.get(device, std::vector<std::string>(), &message)) {
+            return;
+        }
+        device->WriteInfo(android::base::StringPrintf("%s:%s", name.c_str(), message.c_str()));
+        return;
+    }
+
+    auto all_args = handlers.get_all_args(device);
+    for (const auto& args : all_args) {
+        std::string message;
+        if (!handlers.get(device, args, &message)) {
+            continue;
+        }
+        std::string arg_string = android::base::Join(args, ":");
+        device->WriteInfo(android::base::StringPrintf("%s:%s:%s", name.c_str(), arg_string.c_str(),
+                                                      message.c_str()));
+    }
+}
+
 bool GetVarHandler(FastbootDevice* device, const std::vector<std::string>& args) {
-    using VariableHandler = std::function<bool(FastbootDevice*, const std::vector<std::string>&)>;
-    const std::unordered_map<std::string, VariableHandler> kVariableMap = {
-            {FB_VAR_VERSION, GetVersion},
-            {FB_VAR_VERSION_BOOTLOADER, GetBootloaderVersion},
-            {FB_VAR_VERSION_BASEBAND, GetBasebandVersion},
-            {FB_VAR_PRODUCT, GetProduct},
-            {FB_VAR_SERIALNO, GetSerial},
-            {FB_VAR_SECURE, GetSecure},
-            {FB_VAR_UNLOCKED, GetUnlocked},
-            {FB_VAR_MAX_DOWNLOAD_SIZE, GetMaxDownloadSize},
-            {FB_VAR_CURRENT_SLOT, ::GetCurrentSlot},
-            {FB_VAR_SLOT_COUNT, GetSlotCount},
-            {FB_VAR_HAS_SLOT, GetHasSlot},
-            {FB_VAR_SLOT_SUCCESSFUL, GetSlotSuccessful},
-            {FB_VAR_SLOT_UNBOOTABLE, GetSlotUnbootable},
-            {FB_VAR_PARTITION_SIZE, GetPartitionSize},
-            {FB_VAR_IS_LOGICAL, GetPartitionIsLogical},
-            {FB_VAR_IS_USERSPACE, GetIsUserspace}};
+    const std::unordered_map<std::string, VariableHandlers> kVariableMap = {
+            {FB_VAR_VERSION, {GetVersion, nullptr}},
+            {FB_VAR_VERSION_BOOTLOADER, {GetBootloaderVersion, nullptr}},
+            {FB_VAR_VERSION_BASEBAND, {GetBasebandVersion, nullptr}},
+            {FB_VAR_PRODUCT, {GetProduct, nullptr}},
+            {FB_VAR_SERIALNO, {GetSerial, nullptr}},
+            {FB_VAR_SECURE, {GetSecure, nullptr}},
+            {FB_VAR_UNLOCKED, {GetUnlocked, nullptr}},
+            {FB_VAR_MAX_DOWNLOAD_SIZE, {GetMaxDownloadSize, nullptr}},
+            {FB_VAR_CURRENT_SLOT, {::GetCurrentSlot, nullptr}},
+            {FB_VAR_SLOT_COUNT, {GetSlotCount, nullptr}},
+            {FB_VAR_HAS_SLOT, {GetHasSlot, GetAllPartitionArgsNoSlot}},
+            {FB_VAR_SLOT_SUCCESSFUL, {GetSlotSuccessful, nullptr}},
+            {FB_VAR_SLOT_UNBOOTABLE, {GetSlotUnbootable, nullptr}},
+            {FB_VAR_PARTITION_SIZE, {GetPartitionSize, GetAllPartitionArgsWithSlot}},
+            {FB_VAR_IS_LOGICAL, {GetPartitionIsLogical, GetAllPartitionArgsWithSlot}},
+            {FB_VAR_IS_USERSPACE, {GetIsUserspace, nullptr}}};
+
+    if (args.size() < 2) {
+        return device->WriteFail("Missing argument");
+    }
+
+    // Special case: return all variables that we can.
+    if (args[1] == "all") {
+        for (const auto& [name, handlers] : kVariableMap) {
+            GetAllVars(device, name, handlers);
+        }
+        return device->WriteOkay("");
+    }
 
     // args[0] is command name, args[1] is variable.
     auto found_variable = kVariableMap.find(args[1]);
     if (found_variable == kVariableMap.end()) {
-        return device->WriteStatus(FastbootResult::FAIL, "Unknown variable");
+        return device->WriteFail("Unknown variable");
     }
 
+    std::string message;
     std::vector<std::string> getvar_args(args.begin() + 2, args.end());
-    return found_variable->second(device, getvar_args);
+    if (!found_variable->second.get(device, getvar_args, &message)) {
+        return device->WriteFail(message);
+    }
+    return device->WriteOkay(message);
 }
 
 bool EraseHandler(FastbootDevice* device, const std::vector<std::string>& args) {
diff --git a/fastboot/device/fastboot_device.cpp b/fastboot/device/fastboot_device.cpp
index 6ed6d32..55aca9c 100644
--- a/fastboot/device/fastboot_device.cpp
+++ b/fastboot/device/fastboot_device.cpp
@@ -137,3 +137,7 @@
 bool FastbootDevice::WriteFail(const std::string& message) {
     return WriteStatus(FastbootResult::FAIL, message);
 }
+
+bool FastbootDevice::WriteInfo(const std::string& message) {
+    return WriteStatus(FastbootResult::INFO, message);
+}
diff --git a/fastboot/device/fastboot_device.h b/fastboot/device/fastboot_device.h
index addc2ef..171e7ae 100644
--- a/fastboot/device/fastboot_device.h
+++ b/fastboot/device/fastboot_device.h
@@ -39,9 +39,10 @@
     bool HandleData(bool read, std::vector<char>* data);
     std::string GetCurrentSlot();
 
-    // Shortcuts for writing OKAY and FAIL status results.
+    // Shortcuts for writing status results.
     bool WriteOkay(const std::string& message);
     bool WriteFail(const std::string& message);
+    bool WriteInfo(const std::string& message);
 
     std::vector<char>& download_data() { return download_data_; }
     Transport* get_transport() { return transport_.get(); }
diff --git a/fastboot/device/utility.cpp b/fastboot/device/utility.cpp
index ec84576..0157e7f 100644
--- a/fastboot/device/utility.cpp
+++ b/fastboot/device/utility.cpp
@@ -16,6 +16,11 @@
 
 #include "utility.h"
 
+#include <dirent.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
 #include <android-base/logging.h>
 #include <fs_mgr_dm_linear.h>
 #include <liblp/liblp.h>
@@ -123,3 +128,33 @@
     *number = slot[0] - 'a';
     return true;
 }
+
+std::vector<std::string> ListPartitions(FastbootDevice* device) {
+    std::vector<std::string> partitions;
+
+    // First get physical partitions.
+    struct dirent* de;
+    std::unique_ptr<DIR, decltype(&closedir)> by_name(opendir("/dev/block/by-name"), closedir);
+    while ((de = readdir(by_name.get())) != nullptr) {
+        if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..")) {
+            continue;
+        }
+        struct stat s;
+        std::string path = "/dev/block/by-name/" + std::string(de->d_name);
+        if (!stat(path.c_str(), &s) && S_ISBLK(s.st_mode)) {
+            partitions.emplace_back(de->d_name);
+        }
+    }
+
+    // Next get logical partitions.
+    if (auto path = FindPhysicalPartition(LP_METADATA_PARTITION_NAME)) {
+        uint32_t slot_number = SlotNumberForSlotSuffix(device->GetCurrentSlot());
+        if (auto metadata = ReadMetadata(path->c_str(), slot_number)) {
+            for (const auto& partition : metadata->partitions) {
+                std::string partition_name = GetPartitionName(partition);
+                partitions.emplace_back(partition_name);
+            }
+        }
+    }
+    return partitions;
+}
diff --git a/fastboot/device/utility.h b/fastboot/device/utility.h
index 0931fc3..4f0d079 100644
--- a/fastboot/device/utility.h
+++ b/fastboot/device/utility.h
@@ -56,5 +56,5 @@
 bool LogicalPartitionExists(const std::string& name, const std::string& slot_suffix,
                             bool* is_zero_length = nullptr);
 bool OpenPartition(FastbootDevice* device, const std::string& name, PartitionHandle* handle);
-
 bool GetSlotNumber(const std::string& slot, android::hardware::boot::V1_0::Slot* number);
+std::vector<std::string> ListPartitions(FastbootDevice* device);
diff --git a/fastboot/device/variables.cpp b/fastboot/device/variables.cpp
index 65cfea3..91e844a 100644
--- a/fastboot/device/variables.cpp
+++ b/fastboot/device/variables.cpp
@@ -35,141 +35,224 @@
 constexpr int kMaxDownloadSizeDefault = 0x20000000;
 constexpr char kFastbootProtocolVersion[] = "0.4";
 
-bool GetVersion(FastbootDevice* device, const std::vector<std::string>& /* args */) {
-    return device->WriteOkay(kFastbootProtocolVersion);
+bool GetVersion(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                std::string* message) {
+    *message = kFastbootProtocolVersion;
+    return true;
 }
 
-bool GetBootloaderVersion(FastbootDevice* device, const std::vector<std::string>& /* args */) {
-    return device->WriteOkay(android::base::GetProperty("ro.bootloader", ""));
+bool GetBootloaderVersion(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                          std::string* message) {
+    *message = android::base::GetProperty("ro.bootloader", "");
+    return true;
 }
 
-bool GetBasebandVersion(FastbootDevice* device, const std::vector<std::string>& /* args */) {
-    return device->WriteOkay(android::base::GetProperty("ro.build.expect.baseband", ""));
+bool GetBasebandVersion(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                        std::string* message) {
+    *message = android::base::GetProperty("ro.build.expect.baseband", "");
+    return true;
 }
 
-bool GetProduct(FastbootDevice* device, const std::vector<std::string>& /* args */) {
-    return device->WriteOkay(android::base::GetProperty("ro.product.device", ""));
+bool GetProduct(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                std::string* message) {
+    *message = android::base::GetProperty("ro.product.device", "");
+    return true;
 }
 
-bool GetSerial(FastbootDevice* device, const std::vector<std::string>& /* args */) {
-    return device->WriteOkay(android::base::GetProperty("ro.serialno", ""));
+bool GetSerial(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+               std::string* message) {
+    *message = android::base::GetProperty("ro.serialno", "");
+    return true;
 }
 
-bool GetSecure(FastbootDevice* device, const std::vector<std::string>& /* args */) {
-    return device->WriteOkay(android::base::GetBoolProperty("ro.secure", "") ? "yes" : "no");
+bool GetSecure(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+               std::string* message) {
+    *message = android::base::GetBoolProperty("ro.secure", "") ? "yes" : "no";
+    return true;
 }
 
-bool GetCurrentSlot(FastbootDevice* device, const std::vector<std::string>& /* args */) {
+bool GetCurrentSlot(FastbootDevice* device, const std::vector<std::string>& /* args */,
+                    std::string* message) {
     std::string suffix = device->GetCurrentSlot();
-    std::string slot = suffix.size() == 2 ? suffix.substr(1) : suffix;
-    return device->WriteOkay(slot);
+    *message = suffix.size() == 2 ? suffix.substr(1) : suffix;
+    return true;
 }
 
-bool GetSlotCount(FastbootDevice* device, const std::vector<std::string>& /* args */) {
+bool GetSlotCount(FastbootDevice* device, const std::vector<std::string>& /* args */,
+                  std::string* message) {
     auto boot_control_hal = device->boot_control_hal();
     if (!boot_control_hal) {
-        return "0";
+        *message = "0";
+    } else {
+        *message = std::to_string(boot_control_hal->getNumberSlots());
     }
-    return device->WriteOkay(std::to_string(boot_control_hal->getNumberSlots()));
+    return true;
 }
 
-bool GetSlotSuccessful(FastbootDevice* device, const std::vector<std::string>& args) {
+bool GetSlotSuccessful(FastbootDevice* device, const std::vector<std::string>& args,
+                       std::string* message) {
     if (args.empty()) {
-        return device->WriteFail("Missing argument");
+        *message = "Missing argument";
+        return false;
     }
     Slot slot;
     if (!GetSlotNumber(args[0], &slot)) {
-        return device->WriteFail("Invalid slot");
+        *message = "Invalid slot";
+        return false;
     }
     auto boot_control_hal = device->boot_control_hal();
     if (!boot_control_hal) {
-        return device->WriteFail("Device has no slots");
+        *message = "Device has no slots";
+        return false;
     }
     if (boot_control_hal->isSlotMarkedSuccessful(slot) != BoolResult::TRUE) {
-        return device->WriteOkay("no");
+        *message = "no";
+    } else {
+        *message = "yes";
     }
-    return device->WriteOkay("yes");
+    return true;
 }
 
-bool GetSlotUnbootable(FastbootDevice* device, const std::vector<std::string>& args) {
+bool GetSlotUnbootable(FastbootDevice* device, const std::vector<std::string>& args,
+                       std::string* message) {
     if (args.empty()) {
-        return device->WriteFail("Missing argument");
+        *message = "Missing argument";
+        return false;
     }
     Slot slot;
     if (!GetSlotNumber(args[0], &slot)) {
-        return device->WriteFail("Invalid slot");
+        *message = "Invalid slot";
+        return false;
     }
     auto boot_control_hal = device->boot_control_hal();
     if (!boot_control_hal) {
-        return device->WriteFail("Device has no slots");
+        *message = "Device has no slots";
+        return false;
     }
     if (boot_control_hal->isSlotBootable(slot) != BoolResult::TRUE) {
-        return device->WriteOkay("yes");
+        *message = "yes";
+    } else {
+        *message = "no";
     }
-    return device->WriteOkay("no");
+    return true;
 }
 
-bool GetMaxDownloadSize(FastbootDevice* device, const std::vector<std::string>& /* args */) {
-    return device->WriteOkay(std::to_string(kMaxDownloadSizeDefault));
+bool GetMaxDownloadSize(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                        std::string* message) {
+    *message = std::to_string(kMaxDownloadSizeDefault);
+    return true;
 }
 
-bool GetUnlocked(FastbootDevice* device, const std::vector<std::string>& /* args */) {
-    return device->WriteOkay("yes");
+bool GetUnlocked(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                 std::string* message) {
+    *message = "yes";
+    return true;
 }
 
-bool GetHasSlot(FastbootDevice* device, const std::vector<std::string>& args) {
+bool GetHasSlot(FastbootDevice* device, const std::vector<std::string>& args,
+                std::string* message) {
     if (args.empty()) {
-        return device->WriteFail("Missing argument");
+        *message = "Missing argument";
+        return false;
     }
     std::string slot_suffix = device->GetCurrentSlot();
     if (slot_suffix.empty()) {
-        return device->WriteOkay("no");
+        *message = "no";
+        return true;
     }
     std::string partition_name = args[0] + slot_suffix;
     if (FindPhysicalPartition(partition_name) ||
         LogicalPartitionExists(partition_name, slot_suffix)) {
-        return device->WriteOkay("yes");
+        *message = "yes";
+    } else {
+        *message = "no";
     }
-    return device->WriteOkay("no");
+    return true;
 }
 
-bool GetPartitionSize(FastbootDevice* device, const std::vector<std::string>& args) {
+bool GetPartitionSize(FastbootDevice* device, const std::vector<std::string>& args,
+                      std::string* message) {
     if (args.size() < 1) {
-        return device->WriteFail("Missing argument");
+        *message = "Missing argument";
+        return false;
     }
     // Zero-length partitions cannot be created through device-mapper, so we
     // special case them here.
     bool is_zero_length;
     if (LogicalPartitionExists(args[0], device->GetCurrentSlot(), &is_zero_length) &&
         is_zero_length) {
-        return device->WriteOkay("0");
+        *message = "0";
+        return true;
     }
     // Otherwise, open the partition as normal.
     PartitionHandle handle;
     if (!OpenPartition(device, args[0], &handle)) {
-        return device->WriteFail("Could not open partition");
+        *message = "Could not open partition";
+        return false;
     }
     uint64_t size = get_block_device_size(handle.fd());
-    return device->WriteOkay(android::base::StringPrintf("%" PRIX64, size));
+    *message = android::base::StringPrintf("0x%" PRIX64, size);
+    return true;
 }
 
-bool GetPartitionIsLogical(FastbootDevice* device, const std::vector<std::string>& args) {
+bool GetPartitionIsLogical(FastbootDevice* device, const std::vector<std::string>& args,
+                           std::string* message) {
     if (args.size() < 1) {
-        return device->WriteFail("Missing argument");
+        *message = "Missing argument";
+        return false;
     }
     // Note: if a partition name is in both the GPT and the super partition, we
     // return "true", to be consistent with prefering to flash logical partitions
     // over physical ones.
     std::string partition_name = args[0];
     if (LogicalPartitionExists(partition_name, device->GetCurrentSlot())) {
-        return device->WriteOkay("yes");
+        *message = "yes";
+        return true;
     }
     if (FindPhysicalPartition(partition_name)) {
-        return device->WriteOkay("no");
+        *message = "no";
+        return true;
     }
-    return device->WriteFail("Partition not found");
+    *message = "Partition not found";
+    return false;
 }
 
-bool GetIsUserspace(FastbootDevice* device, const std::vector<std::string>& /* args */) {
-    return device->WriteOkay("yes");
+bool GetIsUserspace(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                    std::string* message) {
+    *message = "yes";
+    return true;
+}
+
+std::vector<std::vector<std::string>> GetAllPartitionArgsWithSlot(FastbootDevice* device) {
+    std::vector<std::vector<std::string>> args;
+    auto partitions = ListPartitions(device);
+    for (const auto& partition : partitions) {
+        args.emplace_back(std::initializer_list<std::string>{partition});
+    }
+    return args;
+}
+
+std::vector<std::vector<std::string>> GetAllPartitionArgsNoSlot(FastbootDevice* device) {
+    auto partitions = ListPartitions(device);
+
+    std::string slot_suffix = device->GetCurrentSlot();
+    if (!slot_suffix.empty()) {
+        auto names = std::move(partitions);
+        for (const auto& name : names) {
+            std::string slotless_name = name;
+            if (android::base::EndsWith(name, "_a") || android::base::EndsWith(name, "_b")) {
+                slotless_name = name.substr(0, name.rfind("_"));
+            }
+            if (std::find(partitions.begin(), partitions.end(), slotless_name) ==
+                partitions.end()) {
+                partitions.emplace_back(slotless_name);
+            }
+        }
+    }
+
+    std::vector<std::vector<std::string>> args;
+    for (const auto& partition : partitions) {
+        args.emplace_back(std::initializer_list<std::string>{partition});
+    }
+    return args;
 }
diff --git a/fastboot/device/variables.h b/fastboot/device/variables.h
index 554a080..c3a64cf 100644
--- a/fastboot/device/variables.h
+++ b/fastboot/device/variables.h
@@ -21,19 +21,34 @@
 
 class FastbootDevice;
 
-bool GetVersion(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetBootloaderVersion(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetBasebandVersion(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetProduct(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetSerial(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetSecure(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetCurrentSlot(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetSlotCount(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetSlotSuccessful(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetSlotUnbootable(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetMaxDownloadSize(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetUnlocked(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetHasSlot(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetPartitionSize(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetPartitionIsLogical(FastbootDevice* device, const std::vector<std::string>& args);
-bool GetIsUserspace(FastbootDevice* device, const std::vector<std::string>& args);
+bool GetVersion(FastbootDevice* device, const std::vector<std::string>& args, std::string* message);
+bool GetBootloaderVersion(FastbootDevice* device, const std::vector<std::string>& args,
+                          std::string* message);
+bool GetBasebandVersion(FastbootDevice* device, const std::vector<std::string>& args,
+                        std::string* message);
+bool GetProduct(FastbootDevice* device, const std::vector<std::string>& args, std::string* message);
+bool GetSerial(FastbootDevice* device, const std::vector<std::string>& args, std::string* message);
+bool GetSecure(FastbootDevice* device, const std::vector<std::string>& args, std::string* message);
+bool GetCurrentSlot(FastbootDevice* device, const std::vector<std::string>& args,
+                    std::string* message);
+bool GetSlotCount(FastbootDevice* device, const std::vector<std::string>& args,
+                  std::string* message);
+bool GetSlotSuccessful(FastbootDevice* device, const std::vector<std::string>& args,
+                       std::string* message);
+bool GetSlotUnbootable(FastbootDevice* device, const std::vector<std::string>& args,
+                       std::string* message);
+bool GetMaxDownloadSize(FastbootDevice* device, const std::vector<std::string>& args,
+                        std::string* message);
+bool GetUnlocked(FastbootDevice* device, const std::vector<std::string>& args,
+                 std::string* message);
+bool GetHasSlot(FastbootDevice* device, const std::vector<std::string>& args, std::string* message);
+bool GetPartitionSize(FastbootDevice* device, const std::vector<std::string>& args,
+                      std::string* message);
+bool GetPartitionIsLogical(FastbootDevice* device, const std::vector<std::string>& args,
+                           std::string* message);
+bool GetIsUserspace(FastbootDevice* device, const std::vector<std::string>& args,
+                    std::string* message);
+
+// Helpers for getvar all.
+std::vector<std::vector<std::string>> GetAllPartitionArgsWithSlot(FastbootDevice* device);
+std::vector<std::vector<std::string>> GetAllPartitionArgsNoSlot(FastbootDevice* device);
diff --git a/fastboot/engine.cpp b/fastboot/engine.cpp
index 6a52b12..d80e986 100644
--- a/fastboot/engine.cpp
+++ b/fastboot/engine.cpp
@@ -88,7 +88,9 @@
 }
 
 void fb_reinit(Transport* transport) {
-    fb->set_transport(transport);
+    if (Transport* old_transport = fb->set_transport(transport)) {
+        delete old_transport;
+    }
 }
 
 const std::string fb_get_error() {
@@ -392,6 +394,6 @@
     }
     fprintf(stderr, "OKAY\n");
 
-    fb->set_transport(nullptr);
+    fb_reinit(nullptr);
     return true;
 }
diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index 6cf544f..1aef567 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -55,6 +55,8 @@
 #include <android-base/strings.h>
 #include <android-base/test_utils.h>
 #include <android-base/unique_fd.h>
+#include <build/version.h>
+#include <platform_tools_version.h>
 #include <sparse/sparse.h>
 #include <ziparchive/zip_archive.h>
 
@@ -107,46 +109,56 @@
     int64_t image_size;
 };
 
+enum class ImageType {
+    // Must be flashed for device to boot into the kernel.
+    BootCritical,
+    // Normal partition to be flashed during "flashall".
+    Normal,
+    // Partition that is never flashed during "flashall".
+    Extra
+};
+
 struct Image {
     const char* nickname;
     const char* img_name;
     const char* sig_name;
     const char* part_name;
     bool optional_if_no_image;
-    bool optional_if_no_partition;
-    bool flashall;
+    ImageType type;
     bool IsSecondary() const { return nickname == nullptr; }
 };
 
 static Image images[] = {
         // clang-format off
-    { "boot",     "boot.img",         "boot.sig",     "boot",     false, false, true, },
-    { nullptr,    "boot_other.img",   "boot.sig",     "boot",     true,  false, true, },
-    { "dtbo",     "dtbo.img",         "dtbo.sig",     "dtbo",     true,  false, true, },
-    { "dts",      "dt.img",           "dt.sig",       "dts",      true,  false, true, },
-    { "odm",      "odm.img",          "odm.sig",      "odm",      true,  false, true, },
-    { "product",  "product.img",      "product.sig",  "product",  true,  false, true, },
+    { "boot",     "boot.img",         "boot.sig",     "boot",     false, ImageType::BootCritical },
+    { nullptr,    "boot_other.img",   "boot.sig",     "boot",     true,  ImageType::Normal },
+    { "cache",    "cache.img",        "cache.sig",    "cache",    true,  ImageType::Extra },
+    { "dtbo",     "dtbo.img",         "dtbo.sig",     "dtbo",     true,  ImageType::BootCritical },
+    { "dts",      "dt.img",           "dt.sig",       "dts",      true,  ImageType::BootCritical },
+    { "odm",      "odm.img",          "odm.sig",      "odm",      true,  ImageType::Normal },
+    { "product",  "product.img",      "product.sig",  "product",  true,  ImageType::Normal },
     { "product_services",
                   "product_services.img",
                                       "product_services.sig",
                                                       "product_services",
-                                                                  true,  true,  true, },
-    { "recovery", "recovery.img",     "recovery.sig", "recovery", true,  false, true, },
-    { "system",   "system.img",       "system.sig",   "system",   false, true,  true, },
-    { nullptr,    "system_other.img", "system.sig",   "system",   true,  false, true, },
-    { "vbmeta",   "vbmeta.img",       "vbmeta.sig",   "vbmeta",   true,  false, true, },
-    { "vendor",   "vendor.img",       "vendor.sig",   "vendor",   true,  true,  true, },
-    { nullptr,    "vendor_other.img", "vendor.sig",   "vendor",   true,  false, true, },
-    { "super",    "super.img",        "super.sig",    "super",    true,  true, false, },
+                                                                  true,  ImageType::Normal },
+    { "recovery", "recovery.img",     "recovery.sig", "recovery", true,  ImageType::BootCritical },
+    { "super",    "super.img",        "super.sig",    "super",    true,  ImageType::Extra },
+    { "system",   "system.img",       "system.sig",   "system",   false, ImageType::Normal },
+    { nullptr,    "system_other.img", "system.sig",   "system",   true,  ImageType::Normal },
+    { "userdata", "userdata.img",     "userdata.sig", "userdata", true,  ImageType::Extra },
+    { "vbmeta",   "vbmeta.img",       "vbmeta.sig",   "vbmeta",   true,  ImageType::BootCritical },
+    { "vendor",   "vendor.img",       "vendor.sig",   "vendor",   true,  ImageType::Normal },
+    { nullptr,    "vendor_other.img", "vendor.sig",   "vendor",   true,  ImageType::Normal },
         // clang-format on
 };
 
-static std::string find_item_given_name(const char* img_name) {
+static std::string find_item_given_name(const std::string& img_name) {
     char* dir = getenv("ANDROID_PRODUCT_OUT");
     if (dir == nullptr || dir[0] == '\0') {
         die("ANDROID_PRODUCT_OUT not set");
     }
-    return android::base::StringPrintf("%s/%s", dir, img_name);
+    return std::string(dir) + "/" + img_name;
 }
 
 static std::string find_item(const std::string& item) {
@@ -156,9 +168,6 @@
         }
     }
 
-    if (item == "userdata") return find_item_given_name("userdata.img");
-    if (item == "cache") return find_item_given_name("cache.img");
-
     fprintf(stderr, "unknown partition '%s'\n", item.c_str());
     return "";
 }
@@ -567,6 +576,7 @@
     ZipEntry zip_entry;
     if (FindEntry(zip, zip_entry_name, &zip_entry) != 0) {
         fprintf(stderr, "archive does not contain '%s'\n", entry_name);
+        errno = ENOENT;
         return -1;
     }
 
@@ -638,8 +648,7 @@
     // "require partition-exists=x" is a special case, added because of the trouble we had when
     // Pixel 2 shipped with new partitions and users used old versions of fastboot to flash them,
     // missing out new partitions. A device with new partitions can use "partition-exists" to
-    // override the fields `optional_if_no_image` and 'optional_if_no_partition' in the `images`
-    // array.
+    // override the fields `optional_if_no_image` in the `images` array.
     if (!strcmp(name, "partition-exists")) {
         const char* partition_name = val[0];
         std::string has_slot;
@@ -651,7 +660,6 @@
         for (size_t i = 0; i < arraysize(images); ++i) {
             if (images[i].nickname && !strcmp(images[i].nickname, partition_name)) {
                 images[i].optional_if_no_image = false;
-                images[i].optional_if_no_partition = false;
                 known_partition = true;
             }
         }
@@ -1028,14 +1036,6 @@
     flash_buf(pname, &buf);
 }
 
-static void do_update_signature(ZipArchiveHandle zip, const char* filename) {
-    int64_t sz;
-    void* data = unzip_to_memory(zip, filename, &sz);
-    if (data == nullptr) return;
-    fb_queue_download("signature", data, sz);
-    fb_queue_command("signature", "installing signature");
-}
-
 // 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(const std::string& slot_override) {
@@ -1075,101 +1075,6 @@
     return fb_getvar("partition-size:" + partition_name, &partition_size);
 }
 
-static void do_update(const char* filename, const std::string& slot_override, bool skip_secondary) {
-    queue_info_dump();
-
-    fb_queue_query_save("product", cur_product, sizeof(cur_product));
-
-    ZipArchiveHandle zip;
-    int error = OpenArchive(filename, &zip);
-    if (error != 0) {
-        die("failed to open zip file '%s': %s", filename, ErrorCodeString(error));
-    }
-
-    int64_t sz;
-    void* data = unzip_to_memory(zip, "android-info.txt", &sz);
-    if (data == nullptr) {
-        die("update package '%s' has no android-info.txt", filename);
-    }
-
-    check_requirements(reinterpret_cast<char*>(data), sz);
-
-    std::string secondary;
-    if (!skip_secondary) {
-        if (slot_override != "") {
-            secondary = get_other_slot(slot_override);
-        } else {
-            secondary = get_other_slot();
-        }
-        if (secondary == "") {
-            if (supports_AB()) {
-                fprintf(stderr, "Warning: Could not determine slot for secondary images. Ignoring.\n");
-            }
-            skip_secondary = true;
-        }
-    }
-    for (size_t i = 0; i < arraysize(images); ++i) {
-        const char* slot = slot_override.c_str();
-        if (images[i].IsSecondary()) {
-            if (!skip_secondary) {
-                slot = secondary.c_str();
-            } else {
-                continue;
-            }
-        }
-
-        int fd = unzip_to_file(zip, images[i].img_name);
-        if (fd == -1) {
-            if (images[i].optional_if_no_image) {
-                continue; // An optional file is missing, so ignore it.
-            }
-            die("non-optional file %s missing", images[i].img_name);
-        }
-
-        if (images[i].optional_if_no_partition &&
-            !if_partition_exists(images[i].part_name, slot)) {
-            continue;
-        }
-
-        fastboot_buffer buf;
-        if (!load_buf_fd(fd, &buf)) {
-            die("cannot load %s from flash: %s", images[i].img_name, strerror(errno));
-        }
-
-        auto update = [&](const std::string& partition) {
-            do_update_signature(zip, images[i].sig_name);
-            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
-             * program exits.
-             */
-        };
-        do_for_partitions(images[i].part_name, slot, update, false);
-    }
-
-    if (slot_override == "all") {
-        set_active("a");
-    } else {
-        set_active(slot_override);
-    }
-
-    CloseArchive(zip);
-}
-
-static void do_send_signature(const std::string& fn) {
-    std::size_t extension_loc = fn.find(".img");
-    if (extension_loc == std::string::npos) return;
-
-    std::string fs_sig = fn.substr(0, extension_loc) + ".sig";
-
-    int64_t sz;
-    void* data = load_file(fs_sig.c_str(), &sz);
-    if (data == nullptr) return;
-
-    fb_queue_download("signature", data, sz);
-    fb_queue_command("signature", "installing signature");
-}
-
 static bool is_logical(const std::string& partition) {
     std::string value;
     return fb_getvar("is-logical:" + partition, &value) && value == "yes";
@@ -1186,27 +1091,166 @@
     fb_reinit(open_device());
 }
 
-static void update_super_partition(bool force_wipe) {
+class ImageSource {
+  public:
+    virtual void* ReadFile(const std::string& name, int64_t* size) const = 0;
+    virtual int OpenFile(const std::string& name) const = 0;
+};
+
+class FlashAllTool {
+  public:
+    FlashAllTool(const ImageSource& source, const std::string& slot_override, bool skip_secondary, bool wipe);
+
+    void Flash();
+
+  private:
+    void CheckRequirements();
+    void DetermineSecondarySlot();
+    void CollectImages();
+    void FlashImages(const std::vector<std::pair<const Image*, std::string>>& images);
+    void FlashImage(const Image& image, const std::string& slot, fastboot_buffer* buf);
+    void UpdateSuperPartition();
+
+    const ImageSource& source_;
+    std::string slot_override_;
+    bool skip_secondary_;
+    bool wipe_;
+    std::string secondary_slot_;
+    std::vector<std::pair<const Image*, std::string>> boot_images_;
+    std::vector<std::pair<const Image*, std::string>> os_images_;
+};
+
+FlashAllTool::FlashAllTool(const ImageSource& source, const std::string& slot_override, bool skip_secondary, bool wipe)
+   : source_(source),
+     slot_override_(slot_override),
+     skip_secondary_(skip_secondary),
+     wipe_(wipe)
+{
+}
+
+void FlashAllTool::Flash() {
+    CheckRequirements();
+    DetermineSecondarySlot();
+    CollectImages();
+
+    // First flash boot partitions. We allow this to happen either in userspace
+    // or in bootloader fastboot.
+    FlashImages(boot_images_);
+
+    // Sync the super partition. This will reboot to userspace fastboot if needed.
+    UpdateSuperPartition();
+
+    // Resize any logical partition to 0, so each partition is reset to 0
+    // extents, and will achieve more optimal allocation.
+    for (const auto& [image, slot] : os_images_) {
+        auto resize_partition = [](const std::string& partition) -> void {
+            if (is_logical(partition)) {
+                fb_queue_resize_partition(partition, "0");
+            }
+        };
+        do_for_partitions(image->part_name, slot, resize_partition, false);
+    }
+
+    // Flash OS images, resizing logical partitions as needed.
+    FlashImages(os_images_);
+
+    if (slot_override_ == "all") {
+        set_active("a");
+    } else {
+        set_active(slot_override_);
+    }
+}
+
+void FlashAllTool::CheckRequirements() {
+    int64_t sz;
+    void* data = source_.ReadFile("android-info.txt", &sz);
+    if (data == nullptr) {
+        die("could not read android-info.txt");
+    }
+    check_requirements(reinterpret_cast<char*>(data), sz);
+}
+
+void FlashAllTool::DetermineSecondarySlot() {
+    if (skip_secondary_) {
+        return;
+    }
+    if (slot_override_ != "") {
+        secondary_slot_ = get_other_slot(slot_override_);
+    } else {
+        secondary_slot_ = get_other_slot();
+    }
+    if (secondary_slot_ == "") {
+        if (supports_AB()) {
+            fprintf(stderr, "Warning: Could not determine slot for secondary images. Ignoring.\n");
+        }
+        skip_secondary_ = true;
+    }
+}
+
+void FlashAllTool::CollectImages() {
+    for (size_t i = 0; i < arraysize(images); ++i) {
+        std::string slot = slot_override_;
+        if (images[i].IsSecondary()) {
+            if (skip_secondary_) {
+                continue;
+            }
+            slot = secondary_slot_;
+        }
+        if (images[i].type == ImageType::BootCritical) {
+            boot_images_.emplace_back(&images[i], slot);
+        } else if (images[i].type == ImageType::Normal) {
+            os_images_.emplace_back(&images[i], slot);
+        }
+    }
+}
+
+void FlashAllTool::FlashImages(const std::vector<std::pair<const Image*, std::string>>& images) {
+    for (const auto& [image, slot] : images) {
+        fastboot_buffer buf;
+        int fd = source_.OpenFile(image->img_name);
+        if (fd < 0 || !load_buf_fd(fd, &buf)) {
+            if (image->optional_if_no_image) {
+                continue;
+            }
+            die("could not load '%s': %s", image->img_name, strerror(errno));
+        }
+        FlashImage(*image, slot, &buf);
+    }
+}
+
+void FlashAllTool::FlashImage(const Image& image, const std::string& slot, fastboot_buffer* buf) {
+    auto flash = [&, this](const std::string& partition_name) {
+        int64_t sz;
+        void* data = source_.ReadFile(image.sig_name, &sz);
+        if (data) {
+            fb_queue_download("signature", data, sz);
+            fb_queue_command("signature", "installing signature");
+        }
+
+        if (is_logical(partition_name)) {
+            fb_queue_resize_partition(partition_name, std::to_string(buf->image_size));
+        }
+        flash_buf(partition_name.c_str(), buf);
+    };
+    do_for_partitions(image.part_name, slot, flash, false);
+}
+
+void FlashAllTool::UpdateSuperPartition() {
     if (!if_partition_exists("super", "")) {
         return;
     }
-    std::string image = find_item_given_name("super_empty.img");
-    if (access(image.c_str(), R_OK) < 0) {
+
+    int fd = source_.OpenFile("super_empty.img");
+    if (fd < 0) {
         return;
     }
-
     if (!is_userspace_fastboot()) {
         reboot_to_userspace_fastboot();
     }
-
-    int fd = open(image.c_str(), O_RDONLY);
-    if (fd < 0) {
-        die("could not open '%s': %s", image.c_str(), strerror(errno));
-    }
     fb_queue_download_fd("super", fd, get_file_size(fd));
 
     std::string command = "update-super:super";
-    if (force_wipe) {
+    if (wipe_) {
         command += ":wipe";
     }
     fb_queue_command(command, "Updating super partition");
@@ -1216,88 +1260,68 @@
     fb_execute_queue();
 }
 
+class ZipImageSource final : public ImageSource {
+  public:
+    explicit ZipImageSource(ZipArchiveHandle zip) : zip_(zip) {}
+    void* ReadFile(const std::string& name, int64_t* size) const override;
+    int OpenFile(const std::string& name) const override;
+
+  private:
+    ZipArchiveHandle zip_;
+};
+
+void* ZipImageSource::ReadFile(const std::string& name, int64_t* size) const {
+    return unzip_to_memory(zip_, name.c_str(), size);
+}
+
+int ZipImageSource::OpenFile(const std::string& name) const {
+    return unzip_to_file(zip_, name.c_str());
+}
+
+static void do_update(const char* filename, const std::string& slot_override, bool skip_secondary) {
+    queue_info_dump();
+
+    fb_queue_query_save("product", cur_product, sizeof(cur_product));
+
+    ZipArchiveHandle zip;
+    int error = OpenArchive(filename, &zip);
+    if (error != 0) {
+        die("failed to open zip file '%s': %s", filename, ErrorCodeString(error));
+    }
+
+    FlashAllTool tool(ZipImageSource(zip), slot_override, skip_secondary, false);
+    tool.Flash();
+
+    CloseArchive(zip);
+}
+
+class LocalImageSource final : public ImageSource {
+  public:
+    void* ReadFile(const std::string& name, int64_t* size) const override;
+    int OpenFile(const std::string& name) const override;
+};
+
+void* LocalImageSource::ReadFile(const std::string& name, int64_t* size) const {
+    auto path = find_item_given_name(name);
+    if (path.empty()) {
+        return nullptr;
+    }
+    return load_file(path.c_str(), size);
+}
+
+int LocalImageSource::OpenFile(const std::string& name) const {
+    auto path = find_item_given_name(name);
+    return open(path.c_str(), O_RDONLY);
+}
+
 static void do_flashall(const std::string& slot_override, bool skip_secondary, bool wipe) {
     std::string fname;
     queue_info_dump();
 
     fb_queue_query_save("product", cur_product, sizeof(cur_product));
 
-    fname = find_item_given_name("android-info.txt");
-    if (fname.empty()) die("cannot find android-info.txt");
-
-    int64_t sz;
-    void* data = load_file(fname.c_str(), &sz);
-    if (data == nullptr) die("could not load android-info.txt: %s", strerror(errno));
-
-    check_requirements(reinterpret_cast<char*>(data), sz);
-
-    std::string secondary;
-    if (!skip_secondary) {
-        if (slot_override != "") {
-            secondary = get_other_slot(slot_override);
-        } else {
-            secondary = get_other_slot();
-        }
-        if (secondary == "") {
-            if (supports_AB()) {
-                fprintf(stderr, "Warning: Could not determine slot for secondary images. Ignoring.\n");
-            }
-            skip_secondary = true;
-        }
-    }
-
-    update_super_partition(wipe);
-
-    // List of partitions to flash and their slots.
-    std::vector<std::pair<const Image*, std::string>> entries;
-    for (size_t i = 0; i < arraysize(images); i++) {
-        if (!images[i].flashall) continue;
-        const char* slot = NULL;
-        if (images[i].IsSecondary()) {
-            if (!skip_secondary) slot = secondary.c_str();
-        } else {
-            slot = slot_override.c_str();
-        }
-        if (!slot) continue;
-        entries.emplace_back(&images[i], slot);
-
-        // Resize any logical partition to 0, so each partition is reset to 0
-        // extents, and will achieve more optimal allocation.
-        auto resize_partition = [](const std::string& partition) -> void {
-            if (is_logical(partition)) {
-                fb_queue_resize_partition(partition, "0");
-            }
-        };
-        do_for_partitions(images[i].part_name, slot, resize_partition, false);
-    }
-
-    // Flash each partition in the list if it has a corresponding image.
-    for (const auto& [image, slot] : entries) {
-        fname = find_item_given_name(image->img_name);
-        fastboot_buffer buf;
-        if (!load_buf(fname.c_str(), &buf)) {
-            if (image->optional_if_no_image) continue;
-            die("could not load '%s': %s", image->img_name, strerror(errno));
-        }
-        if (image->optional_if_no_partition &&
-            !if_partition_exists(image->part_name, slot)) {
-            continue;
-        }
-        auto flashall = [&](const std::string &partition) {
-            do_send_signature(fname.c_str());
-            if (is_logical(partition)) {
-                fb_queue_resize_partition(partition, std::to_string(buf.image_size));
-            }
-            flash_buf(partition.c_str(), &buf);
-        };
-        do_for_partitions(image->part_name, slot, flashall, false);
-    }
-
-    if (slot_override == "all") {
-        set_active("a");
-    } else {
-        set_active(slot_override);
-    }
+    FlashAllTool tool(LocalImageSource(), slot_override, skip_secondary, wipe);
+    tool.Flash();
 }
 
 static std::string next_arg(std::vector<std::string>* args) {
@@ -1526,7 +1550,7 @@
                 setvbuf(stdout, nullptr, _IONBF, 0);
                 setvbuf(stderr, nullptr, _IONBF, 0);
             } else if (name == "version") {
-                fprintf(stdout, "fastboot version %s\n", FASTBOOT_VERSION);
+                fprintf(stdout, "fastboot version %s-%s\n", PLATFORM_TOOLS_VERSION, android::build::GetBuildNumber().c_str());
                 fprintf(stdout, "Installed as %s\n", android::base::GetExecutablePath().c_str());
                 return 0;
 #if !defined(_WIN32)
@@ -1823,6 +1847,10 @@
 
     int status = fb_execute_queue() ? EXIT_FAILURE : EXIT_SUCCESS;
     fprintf(stderr, "Finished. Total time: %.3fs\n", (now() - start));
+
+    if (Transport* old_transport = fb.set_transport(nullptr)) {
+        delete old_transport;
+    }
     return status;
 }
 
diff --git a/fastboot/fastboot_driver.cpp b/fastboot/fastboot_driver.cpp
index e8587c7..f9e640a 100644
--- a/fastboot/fastboot_driver.cpp
+++ b/fastboot/fastboot_driver.cpp
@@ -58,7 +58,6 @@
 }
 
 FastBootDriver::~FastBootDriver() {
-    set_transport(nullptr);
 }
 
 RetCode FastBootDriver::Boot(std::string* response, std::vector<std::string>* info) {
@@ -89,10 +88,6 @@
     return GetVar("all", &tmp, response);
 }
 
-RetCode FastBootDriver::Powerdown(std::string* response, std::vector<std::string>* info) {
-    return RawCommand(Commands::POWERDOWN, response, info);
-}
-
 RetCode FastBootDriver::Reboot(std::string* response, std::vector<std::string>* info) {
     return RawCommand(Commands::REBOOT, response, info);
 }
@@ -107,11 +102,6 @@
     return RawCommand(Commands::SET_ACTIVE + part, response, info);
 }
 
-RetCode FastBootDriver::Verify(uint32_t num, std::string* response, std::vector<std::string>* info) {
-    std::string cmd = android::base::StringPrintf("%s%08" PRIx32, Commands::VERIFY.c_str(), num);
-    return RawCommand(cmd, response, info);
-}
-
 RetCode FastBootDriver::FlashPartition(const std::string& part, const std::vector<char>& data) {
     RetCode ret;
     if ((ret = Download(data))) {
@@ -136,7 +126,7 @@
     return RawCommand(Commands::FLASH + part);
 }
 
-RetCode FastBootDriver::Partitions(std::vector<std::tuple<std::string, uint32_t>>* parts) {
+RetCode FastBootDriver::Partitions(std::vector<std::tuple<std::string, uint64_t>>* parts) {
     std::vector<std::string> all;
     RetCode ret;
     if ((ret = GetVarAll(&all))) {
@@ -150,7 +140,7 @@
         if (std::regex_match(s, sm, reg)) {
             std::string m1(sm[1]);
             std::string m2(sm[2]);
-            uint32_t tmp = strtol(m2.c_str(), 0, 16);
+            uint64_t tmp = strtoll(m2.c_str(), 0, 16);
             parts->push_back(std::make_tuple(m1, tmp));
         }
     }
@@ -436,11 +426,9 @@
 const std::string FastBootDriver::Commands::ERASE = "erase:";
 const std::string FastBootDriver::Commands::FLASH = "flash:";
 const std::string FastBootDriver::Commands::GET_VAR = "getvar:";
-const std::string FastBootDriver::Commands::POWERDOWN = "powerdown";
 const std::string FastBootDriver::Commands::REBOOT = "reboot";
 const std::string FastBootDriver::Commands::SET_ACTIVE = "set_active:";
 const std::string FastBootDriver::Commands::UPLOAD = "upload";
-const std::string FastBootDriver::Commands::VERIFY = "verify:";
 
 /******************************* PRIVATE **************************************/
 RetCode FastBootDriver::SendBuffer(int fd, size_t size) {
@@ -548,12 +536,9 @@
     return 0;
 }
 
-void FastBootDriver::set_transport(Transport* transport) {
-    if (transport_) {
-        transport_->Close();
-        delete transport_;
-    }
-    transport_ = transport;
+Transport* FastBootDriver::set_transport(Transport* transport) {
+    std::swap(transport_, transport);
+    return transport;
 }
 
 }  // End namespace fastboot
diff --git a/fastboot/fastboot_driver.h b/fastboot/fastboot_driver.h
index a97ed2c..ca9003a 100644
--- a/fastboot/fastboot_driver.h
+++ b/fastboot/fastboot_driver.h
@@ -86,7 +86,6 @@
     RetCode GetVar(const std::string& key, std::string* val,
                    std::vector<std::string>* info = nullptr);
     RetCode GetVarAll(std::vector<std::string>* response);
-    RetCode Powerdown(std::string* response = nullptr, std::vector<std::string>* info = nullptr);
     RetCode Reboot(std::string* response = nullptr, std::vector<std::string>* info = nullptr);
     RetCode RebootTo(std::string target, std::string* response = nullptr,
                      std::vector<std::string>* info = nullptr);
@@ -94,15 +93,13 @@
                       std::vector<std::string>* info = nullptr);
     RetCode Upload(const std::string& outfile, std::string* response = nullptr,
                    std::vector<std::string>* info = nullptr);
-    RetCode Verify(uint32_t num, std::string* response = nullptr,
-                   std::vector<std::string>* info = nullptr);
 
     /* HIGHER LEVEL COMMANDS -- Composed of the commands above */
     RetCode FlashPartition(const std::string& part, const std::vector<char>& data);
     RetCode FlashPartition(const std::string& part, int fd, uint32_t sz);
     RetCode FlashPartition(const std::string& part, sparse_file* s);
 
-    RetCode Partitions(std::vector<std::tuple<std::string, uint32_t>>* parts);
+    RetCode Partitions(std::vector<std::tuple<std::string, uint64_t>>* parts);
     RetCode Require(const std::string& var, const std::vector<std::string>& allowed, bool* reqmet,
                     bool invert = false);
 
@@ -112,8 +109,8 @@
     std::string Error();
     RetCode WaitForDisconnect();
 
-    // Note: changing the transport will close and delete the existing one.
-    void set_transport(Transport* transport);
+    // Note: set_transport will return the previous transport.
+    Transport* set_transport(Transport* transport);
     Transport* transport() const { return transport_; }
 
     // This is temporarily public for engine.cpp
@@ -136,11 +133,9 @@
         static const std::string ERASE;
         static const std::string FLASH;
         static const std::string GET_VAR;
-        static const std::string POWERDOWN;
         static const std::string REBOOT;
         static const std::string SET_ACTIVE;
         static const std::string UPLOAD;
-        static const std::string VERIFY;
     };
 
     Transport* transport_;
diff --git a/fastboot/fuzzy_fastboot/fixtures.cpp b/fastboot/fuzzy_fastboot/fixtures.cpp
index 0a87598..4da71ca 100644
--- a/fastboot/fuzzy_fastboot/fixtures.cpp
+++ b/fastboot/fuzzy_fastboot/fixtures.cpp
@@ -133,7 +133,6 @@
     fb.reset();
 
     if (transport) {
-        transport->Close();
         transport.reset();
     }
 
@@ -188,7 +187,6 @@
         ASSERT_EQ(fb->RawCommand("flashing " + cmd, &resp), SUCCESS)
                 << "Attempting to change locked state, but 'flashing" + cmd + "' command failed";
         fb.reset();
-        transport->Close();
         transport.reset();
         printf("PLEASE RESPOND TO PROMPT FOR '%sing' BOOTLOADER ON DEVICE\n", cmd.c_str());
         while (UsbStillAvailible())
@@ -249,7 +247,6 @@
     }
 
     if (transport) {
-        transport->Close();
         transport.reset();
     }
 
diff --git a/fastboot/fuzzy_fastboot/main.cpp b/fastboot/fuzzy_fastboot/main.cpp
index 14bf5bf..dd64082 100644
--- a/fastboot/fuzzy_fastboot/main.cpp
+++ b/fastboot/fuzzy_fastboot/main.cpp
@@ -86,9 +86,8 @@
 
 const std::string DEFAULT_OUPUT_NAME = "out.img";
 // const char scratch_partition[] = "userdata";
-const std::vector<std::string> CMDS{"boot",        "continue", "download:", "erase:",
-                                    "flash:",      "getvar:",  "powerdown", "reboot",
-                                    "set_active:", "upload",   "verify"};
+const std::vector<std::string> CMDS{"boot",    "continue", "download:",   "erase:", "flash:",
+                                    "getvar:", "reboot",   "set_active:", "upload"};
 
 // For pretty printing we need all these overloads
 ::std::ostream& operator<<(::std::ostream& os, const RetCode& ret) {
@@ -305,13 +304,13 @@
 }
 
 TEST_F(Conformance, PartitionInfo) {
-    std::vector<std::tuple<std::string, uint32_t>> parts;
+    std::vector<std::tuple<std::string, uint64_t>> parts;
     EXPECT_EQ(fb->Partitions(&parts), SUCCESS) << "getvar:all failed";
     EXPECT_GT(parts.size(), 0)
             << "getvar:all did not report any partition-size: through INFO responses";
     std::set<std::string> allowed{"ext4", "f2fs", "raw"};
     for (const auto p : parts) {
-        EXPECT_GT(std::get<1>(p), 0);
+        EXPECT_GE(std::get<1>(p), 0);
         std::string part(std::get<0>(p));
         std::set<std::string> allowed{"ext4", "f2fs", "raw"};
         std::string resp;
@@ -341,7 +340,7 @@
     // Can't run out of alphabet letters...
     ASSERT_LE(num_slots, 26) << "What?! You can't have more than 26 slots";
 
-    std::vector<std::tuple<std::string, uint32_t>> parts;
+    std::vector<std::tuple<std::string, uint64_t>> parts;
     EXPECT_EQ(fb->Partitions(&parts), SUCCESS) << "getvar:all failed";
 
     std::map<std::string, std::set<char>> part_slots;
@@ -588,14 +587,14 @@
     std::vector<char> buf{'a', 'o', 's', 'p'};
     EXPECT_EQ(fb->Download(buf), SUCCESS) << "Download failed in unlocked mode";
     ;
-    std::vector<std::tuple<std::string, uint32_t>> parts;
+    std::vector<std::tuple<std::string, uint64_t>> parts;
     EXPECT_EQ(fb->Partitions(&parts), SUCCESS) << "getvar:all failed in unlocked mode";
 }
 
 TEST_F(LockPermissions, DownloadFlash) {
     std::vector<char> buf{'a', 'o', 's', 'p'};
     EXPECT_EQ(fb->Download(buf), SUCCESS) << "Download failed in locked mode";
-    std::vector<std::tuple<std::string, uint32_t>> parts;
+    std::vector<std::tuple<std::string, uint64_t>> parts;
     EXPECT_EQ(fb->Partitions(&parts), SUCCESS) << "getvar:all failed in locked mode";
     std::string resp;
     for (const auto tup : parts) {
@@ -608,7 +607,7 @@
 }
 
 TEST_F(LockPermissions, Erase) {
-    std::vector<std::tuple<std::string, uint32_t>> parts;
+    std::vector<std::tuple<std::string, uint64_t>> parts;
     EXPECT_EQ(fb->Partitions(&parts), SUCCESS) << "getvar:all failed";
     std::string resp;
     for (const auto tup : parts) {
@@ -620,7 +619,7 @@
 }
 
 TEST_F(LockPermissions, SetActive) {
-    std::vector<std::tuple<std::string, uint32_t>> parts;
+    std::vector<std::tuple<std::string, uint64_t>> parts;
     EXPECT_EQ(fb->Partitions(&parts), SUCCESS) << "getvar:all failed";
 
     std::string resp;
@@ -917,7 +916,7 @@
 
 TEST_P(AnyPartition, ReportedGetVarAll) {
     // As long as the partition is reported in INFO, it would be tested by generic Conformance
-    std::vector<std::tuple<std::string, uint32_t>> parts;
+    std::vector<std::tuple<std::string, uint64_t>> parts;
     ASSERT_EQ(fb->Partitions(&parts), SUCCESS) << "getvar:all failed";
     const std::string name = GetParam().first;
     if (GetParam().second.slots) {
diff --git a/fastboot/fuzzy_fastboot/usb_transport_sniffer.cpp b/fastboot/fuzzy_fastboot/usb_transport_sniffer.cpp
index ee510e9..7c595f4 100644
--- a/fastboot/fuzzy_fastboot/usb_transport_sniffer.cpp
+++ b/fastboot/fuzzy_fastboot/usb_transport_sniffer.cpp
@@ -12,6 +12,10 @@
                                          const int serial_fd)
     : transport_(std::move(transport)), serial_fd_(serial_fd) {}
 
+UsbTransportSniffer::~UsbTransportSniffer() {
+    Close();
+}
+
 ssize_t UsbTransportSniffer::Read(void* data, size_t len) {
     ProcessSerial();
 
diff --git a/fastboot/fuzzy_fastboot/usb_transport_sniffer.h b/fastboot/fuzzy_fastboot/usb_transport_sniffer.h
index 693f042..89cc009 100644
--- a/fastboot/fuzzy_fastboot/usb_transport_sniffer.h
+++ b/fastboot/fuzzy_fastboot/usb_transport_sniffer.h
@@ -68,6 +68,7 @@
     };
 
     UsbTransportSniffer(std::unique_ptr<UsbTransport> transport, const int serial_fd = 0);
+    ~UsbTransportSniffer() override;
 
     virtual ssize_t Read(void* data, size_t len) override;
     virtual ssize_t Write(const void* data, size_t len) override;
diff --git a/fastboot/usb_linux.cpp b/fastboot/usb_linux.cpp
index 9b779dd..6363aa5 100644
--- a/fastboot/usb_linux.cpp
+++ b/fastboot/usb_linux.cpp
@@ -95,7 +95,7 @@
   public:
     explicit LinuxUsbTransport(std::unique_ptr<usb_handle> handle, uint32_t ms_timeout = 0)
         : handle_(std::move(handle)), ms_timeout_(ms_timeout) {}
-    ~LinuxUsbTransport() override = default;
+    ~LinuxUsbTransport() override;
 
     ssize_t Read(void* data, size_t len) override;
     ssize_t Write(const void* data, size_t len) override;
@@ -387,6 +387,10 @@
     return usb;
 }
 
+LinuxUsbTransport::~LinuxUsbTransport() {
+    Close();
+}
+
 ssize_t LinuxUsbTransport::Write(const void* _data, size_t len)
 {
     unsigned char *data = (unsigned char*) _data;
diff --git a/fastboot/usb_osx.cpp b/fastboot/usb_osx.cpp
index 4d48f6e..ed02c4a 100644
--- a/fastboot/usb_osx.cpp
+++ b/fastboot/usb_osx.cpp
@@ -70,7 +70,7 @@
     // A timeout of 0 is blocking
     OsxUsbTransport(std::unique_ptr<usb_handle> handle, uint32_t ms_timeout = 0)
         : handle_(std::move(handle)), ms_timeout_(ms_timeout) {}
-    ~OsxUsbTransport() override = default;
+    ~OsxUsbTransport() override;
 
     ssize_t Read(void* data, size_t len) override;
     ssize_t Write(const void* data, size_t len) override;
@@ -471,6 +471,10 @@
     return new OsxUsbTransport(std::move(handle), timeout_ms);
 }
 
+OsxUsbTransport::~OsxUsbTransport() {
+    Close();
+}
+
 int OsxUsbTransport::Close() {
     /* TODO: Something better here? */
     return 0;
diff --git a/fastboot/usb_windows.cpp b/fastboot/usb_windows.cpp
index 8c60a71..b00edb3 100644
--- a/fastboot/usb_windows.cpp
+++ b/fastboot/usb_windows.cpp
@@ -69,7 +69,7 @@
 class WindowsUsbTransport : public UsbTransport {
   public:
     WindowsUsbTransport(std::unique_ptr<usb_handle> handle) : handle_(std::move(handle)) {}
-    ~WindowsUsbTransport() override = default;
+    ~WindowsUsbTransport() override;
 
     ssize_t Read(void* data, size_t len) override;
     ssize_t Write(const void* data, size_t len) override;
@@ -250,6 +250,10 @@
     }
 }
 
+WindowsUsbTransport::~WindowsUsbTransport() {
+    Close();
+}
+
 int WindowsUsbTransport::Close() {
     DBG("usb_close\n");
 
diff --git a/fs_mgr/fs_mgr.cpp b/fs_mgr/fs_mgr.cpp
index b0c55e3..e3c2c2b 100644
--- a/fs_mgr/fs_mgr.cpp
+++ b/fs_mgr/fs_mgr.cpp
@@ -791,7 +791,8 @@
         argv.emplace_back(arg.c_str());
     }
     LOG(INFO) << "Calling: " << android::base::Join(argv, ' ');
-    int ret = android_fork_execvp(4, const_cast<char**>(argv.data()), nullptr, false, true);
+    int ret =
+            android_fork_execvp(argv.size(), const_cast<char**>(argv.data()), nullptr, false, true);
     if (ret != 0) {
         LOG(ERROR) << "vdc returned error code: " << ret;
         return false;
@@ -853,7 +854,8 @@
         }
 
         /* Skip mounting the root partition, as it will already have been mounted */
-        if (!strcmp(fstab->recs[i].mount_point, "/")) {
+        if (!strcmp(fstab->recs[i].mount_point, "/") ||
+            !strcmp(fstab->recs[i].mount_point, "/system")) {
             if ((fstab->recs[i].fs_mgr_flags & MS_RDONLY) != 0) {
                 fs_mgr_set_blk_ro(fstab->recs[i].blk_device);
             }
diff --git a/fs_mgr/fs_mgr_overlayfs.cpp b/fs_mgr/fs_mgr_overlayfs.cpp
index fb57715..720dcfd 100644
--- a/fs_mgr/fs_mgr_overlayfs.cpp
+++ b/fs_mgr/fs_mgr_overlayfs.cpp
@@ -141,14 +141,13 @@
 constexpr char upperdir_option[] = "upperdir=";
 
 // default options for mount_point, returns empty string for none available.
-std::string fs_mgr_get_overlayfs_options(const char* mount_point) {
-    auto fsrec_mount_point = std::string(mount_point);
-    auto candidate = fs_mgr_get_overlayfs_candidate(fsrec_mount_point);
+std::string fs_mgr_get_overlayfs_options(const std::string& mount_point) {
+    auto candidate = fs_mgr_get_overlayfs_candidate(mount_point);
     if (candidate.empty()) return "";
 
-    auto context = fs_mgr_get_context(fsrec_mount_point);
+    auto context = fs_mgr_get_context(mount_point);
     if (!context.empty()) context = ",rootcontext="s + context;
-    return "override_creds=off,"s + lowerdir_option + fsrec_mount_point + "," + upperdir_option +
+    return "override_creds=off,"s + lowerdir_option + mount_point + "," + upperdir_option +
            candidate + upper_name + ",workdir=" + candidate + work_name + context;
 }
 
@@ -167,10 +166,11 @@
     return true;
 }
 
-std::string fs_mgr_get_overlayfs_options(const fstab* fstab, const char* mount_point) {
-    if (fs_mgr_system_root_image(fstab) && ("/"s == mount_point)) mount_point = "/system";
-
-    return fs_mgr_get_overlayfs_options(mount_point);
+const char* fs_mgr_mount_point(const fstab* fstab, const char* mount_point) {
+    if (!mount_point) return mount_point;
+    if ("/"s != mount_point) return mount_point;
+    if (!fs_mgr_system_root_image(fstab)) return mount_point;
+    return "/system";
 }
 
 // return true if system supports overlayfs
@@ -196,7 +196,7 @@
     if (!fsrec) return false;
 
     auto fsrec_mount_point = fsrec->mount_point;
-    if (!fsrec_mount_point) return false;
+    if (!fsrec_mount_point || !fsrec_mount_point[0]) return false;
     if (!fsrec->blk_device) return false;
 
     if (!fsrec->fs_type) return false;
@@ -265,10 +265,17 @@
     return ret;
 }
 
+constexpr char overlayfs_file_context[] = "u:object_r:overlayfs_file:s0";
+
 bool fs_mgr_overlayfs_setup_one(const std::string& overlay, const std::string& mount_point,
                                 bool* change) {
     auto ret = true;
     auto fsrec_mount_point = overlay + android::base::Basename(mount_point) + "/";
+
+    if (setfscreatecon(overlayfs_file_context)) {
+        ret = false;
+        PERROR << "overlayfs setfscreatecon " << overlayfs_file_context;
+    }
     auto save_errno = errno;
     if (!mkdir(fsrec_mount_point.c_str(), 0755)) {
         if (change) *change = true;
@@ -288,6 +295,7 @@
     } else {
         errno = save_errno;
     }
+    setfscreatecon(nullptr);
 
     auto new_context = fs_mgr_get_context(mount_point);
     if (!new_context.empty() && setfscreatecon(new_context.c_str())) {
@@ -309,15 +317,12 @@
     return ret;
 }
 
-bool fs_mgr_overlayfs_mount(const fstab* fstab, const fstab_rec* fsrec) {
-    if (!fs_mgr_wants_overlayfs(fsrec)) return false;
-    auto fsrec_mount_point = fsrec->mount_point;
-    if (!fsrec_mount_point || !fsrec_mount_point[0]) return false;
-    auto options = fs_mgr_get_overlayfs_options(fstab, fsrec_mount_point);
+bool fs_mgr_overlayfs_mount(const std::string& mount_point) {
+    auto options = fs_mgr_get_overlayfs_options(mount_point);
     if (options.empty()) return false;
 
     // hijack __mount() report format to help triage
-    auto report = "__mount(source=overlay,target="s + fsrec_mount_point + ",type=overlay";
+    auto report = "__mount(source=overlay,target="s + mount_point + ",type=overlay";
     const auto opt_list = android::base::Split(options, ",");
     for (const auto opt : opt_list) {
         if (android::base::StartsWith(opt, upperdir_option)) {
@@ -327,7 +332,7 @@
     }
     report = report + ")=";
 
-    auto ret = mount("overlay", fsrec_mount_point, "overlay", MS_RDONLY | MS_RELATIME,
+    auto ret = mount("overlay", mount_point.c_str(), "overlay", MS_RDONLY | MS_RELATIME,
                      options.c_str());
     if (ret) {
         PERROR << report << ret;
@@ -338,8 +343,7 @@
     }
 }
 
-bool fs_mgr_overlayfs_already_mounted(const char* mount_point) {
-    if (!mount_point) return false;
+bool fs_mgr_overlayfs_already_mounted(const std::string& mount_point) {
     std::unique_ptr<struct fstab, decltype(&fs_mgr_free_fstab)> fstab(
             fs_mgr_read_fstab("/proc/mounts"), fs_mgr_free_fstab);
     if (!fstab) return false;
@@ -351,7 +355,7 @@
         if (("overlay"s != fs_type) && ("overlayfs"s != fs_type)) continue;
         auto fsrec_mount_point = fsrec->mount_point;
         if (!fsrec_mount_point) continue;
-        if (strcmp(fsrec_mount_point, mount_point)) continue;
+        if (mount_point != fsrec_mount_point) continue;
         const auto fs_options = fsrec->fs_options;
         if (!fs_options) continue;
         const auto options = android::base::Split(fs_options, ",");
@@ -364,6 +368,34 @@
     return false;
 }
 
+std::vector<std::string> fs_mgr_candidate_list(const fstab* fstab,
+                                               const char* mount_point = nullptr) {
+    std::vector<std::string> mounts;
+    if (!fstab) return mounts;
+
+    for (auto i = 0; i < fstab->num_entries; i++) {
+        const auto fsrec = &fstab->recs[i];
+        if (!fs_mgr_wants_overlayfs(fsrec)) continue;
+        std::string new_mount_point(fs_mgr_mount_point(fstab, fsrec->mount_point));
+        if (mount_point && (new_mount_point != mount_point)) continue;
+        auto duplicate_or_more_specific = false;
+        for (auto it = mounts.begin(); it != mounts.end();) {
+            if ((*it == new_mount_point) ||
+                (android::base::StartsWith(new_mount_point, *it + "/"))) {
+                duplicate_or_more_specific = true;
+                break;
+            }
+            if (android::base::StartsWith(*it, new_mount_point + "/")) {
+                it = mounts.erase(it);
+            } else {
+                ++it;
+            }
+        }
+        if (!duplicate_or_more_specific) mounts.emplace_back(new_mount_point);
+    }
+    return mounts;
+}
+
 }  // namespace
 
 bool fs_mgr_overlayfs_mount_all() {
@@ -375,13 +407,9 @@
                                                                       fs_mgr_free_fstab);
     if (!fstab) return ret;
 
-    for (auto i = 0; i < fstab->num_entries; i++) {
-        const auto fsrec = &fstab->recs[i];
-        auto fsrec_mount_point = fsrec->mount_point;
-        if (!fsrec_mount_point) continue;
-        if (fs_mgr_overlayfs_already_mounted(fsrec_mount_point)) continue;
-
-        if (fs_mgr_overlayfs_mount(fstab.get(), fsrec)) ret = true;
+    for (const auto& mount_point : fs_mgr_candidate_list(fstab.get())) {
+        if (fs_mgr_overlayfs_already_mounted(mount_point)) continue;
+        if (fs_mgr_overlayfs_mount(mount_point)) ret = true;
     }
     return ret;
 }
@@ -404,22 +432,12 @@
 
     std::unique_ptr<struct fstab, decltype(&fs_mgr_free_fstab)> fstab(fs_mgr_read_fstab_default(),
                                                                       fs_mgr_free_fstab);
-    std::vector<std::string> mounts;
-    if (fstab) {
-        if (!fs_mgr_get_entry_for_mount_point(fstab.get(), kOverlayMountPoint)) return ret;
-        for (auto i = 0; i < fstab->num_entries; i++) {
-            const auto fsrec = &fstab->recs[i];
-            auto fsrec_mount_point = fsrec->mount_point;
-            if (!fsrec_mount_point) continue;
-            if (mount_point && strcmp(fsrec_mount_point, mount_point)) continue;
-            if (!fs_mgr_wants_overlayfs(fsrec)) continue;
-            mounts.emplace_back(fsrec_mount_point);
-        }
-        if (mounts.empty()) return ret;
-    }
+    if (fstab && !fs_mgr_get_entry_for_mount_point(fstab.get(), kOverlayMountPoint)) return ret;
+    auto mounts = fs_mgr_candidate_list(fstab.get(), fs_mgr_mount_point(fstab.get(), mount_point));
+    if (fstab && mounts.empty()) return ret;
 
-    if (mount_point && ("/"s == mount_point) && fs_mgr_system_root_image(fstab.get())) {
-        mount_point = "/system";
+    if (setfscreatecon(overlayfs_file_context)) {
+        PERROR << "overlayfs setfscreatecon " << overlayfs_file_context;
     }
     auto overlay = kOverlayMountPoint + "/overlay/";
     auto save_errno = errno;
@@ -430,6 +448,7 @@
     } else {
         errno = save_errno;
     }
+    setfscreatecon(nullptr);
     if (!fstab && mount_point && fs_mgr_overlayfs_setup_one(overlay, mount_point, change)) {
         ret = true;
     }
@@ -443,11 +462,10 @@
 // If something is altered, set *change.
 bool fs_mgr_overlayfs_teardown(const char* mount_point, bool* change) {
     if (change) *change = false;
-    if (mount_point && ("/"s == mount_point)) {
-        std::unique_ptr<struct fstab, decltype(&fs_mgr_free_fstab)> fstab(
-                fs_mgr_read_fstab_default(), fs_mgr_free_fstab);
-        if (fs_mgr_system_root_image(fstab.get())) mount_point = "/system";
-    }
+    mount_point = fs_mgr_mount_point(std::unique_ptr<struct fstab, decltype(&fs_mgr_free_fstab)>(
+                                             fs_mgr_read_fstab_default(), fs_mgr_free_fstab)
+                                             .get(),
+                                     mount_point);
     auto ret = true;
     const auto overlay = kOverlayMountPoint + "/overlay";
     const auto oldpath = overlay + (mount_point ?: "");
diff --git a/init/Android.mk b/init/Android.mk
index ada87b8..dc400ad 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -47,6 +47,7 @@
     init_first_stage.cpp \
     reboot_utils.cpp \
     selinux.cpp \
+    switch_root.cpp \
     uevent_listener.cpp \
     util.cpp \
 
@@ -54,8 +55,15 @@
 
 LOCAL_FORCE_STATIC_EXECUTABLE := true
 
-LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT)
-LOCAL_UNSTRIPPED_PATH := $(TARGET_ROOT_OUT_UNSTRIPPED)
+LOCAL_MODULE_PATH := $(TARGET_RAMDISK_OUT)
+LOCAL_UNSTRIPPED_PATH := $(TARGET_RAMDISK_OUT_UNSTRIPPED)
+
+# Set up the same mount points on the ramdisk that system-as-root contains.
+LOCAL_POST_INSTALL_CMD := \
+    mkdir -p $(TARGET_RAMDISK_OUT)/dev \
+    mkdir -p $(TARGET_RAMDISK_OUT)/mnt \
+    mkdir -p $(TARGET_RAMDISK_OUT)/proc \
+    mkdir -p $(TARGET_RAMDISK_OUT)/sys \
 
 LOCAL_STATIC_LIBRARIES := \
     libfs_mgr \
diff --git a/init/first_stage_mount.cpp b/init/first_stage_mount.cpp
index 0c5cf76..fa3392e 100644
--- a/init/first_stage_mount.cpp
+++ b/init/first_stage_mount.cpp
@@ -29,19 +29,22 @@
 #include <android-base/file.h>
 #include <android-base/logging.h>
 #include <android-base/strings.h>
+#include <fs_mgr.h>
+#include <fs_mgr_avb.h>
+#include <fs_mgr_dm_linear.h>
+#include <fs_mgr_overlayfs.h>
 #include <liblp/metadata_format.h>
 
 #include "devices.h"
-#include "fs_mgr.h"
-#include "fs_mgr_avb.h"
-#include "fs_mgr_dm_linear.h"
-#include "fs_mgr_overlayfs.h"
+#include "switch_root.h"
 #include "uevent.h"
 #include "uevent_listener.h"
 #include "util.h"
 
 using android::base::Timer;
 
+using namespace std::literals;
+
 namespace android {
 namespace init {
 
@@ -63,6 +66,7 @@
     bool InitRequiredDevices();
     bool InitMappedDevice(const std::string& verity_device);
     bool CreateLogicalPartitions();
+    bool MountPartition(fstab_rec* fstab_rec);
     bool MountPartitions();
     bool GetBackingDmLinearDevices();
 
@@ -333,26 +337,51 @@
     return true;
 }
 
-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 << "'";
+bool FirstStageMount::MountPartition(fstab_rec* fstab_rec) {
+    if (fs_mgr_is_logical(fstab_rec)) {
+        if (!fs_mgr_update_logical_partition(fstab_rec)) {
             return false;
         }
-        if (fs_mgr_do_mount_one(fstab_rec)) {
-            PLOG(ERROR) << "Failed to mount '" << fstab_rec->mount_point << "'";
+        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;
+    }
+    if (fs_mgr_do_mount_one(fstab_rec)) {
+        PLOG(ERROR) << "Failed to mount '" << fstab_rec->mount_point << "'";
+        return false;
+    }
+    return true;
+}
+
+bool FirstStageMount::MountPartitions() {
+    // If system is in the fstab then we're not a system-as-root device, and in
+    // this case, we mount system first then pivot to it.  From that point on,
+    // we are effectively identical to a system-as-root device.
+    auto system_partition =
+            std::find_if(mount_fstab_recs_.begin(), mount_fstab_recs_.end(),
+                         [](const auto& rec) { return rec->mount_point == "/system"s; });
+    if (system_partition != mount_fstab_recs_.end()) {
+        if (!MountPartition(*system_partition)) {
+            return false;
+        }
+
+        SwitchRoot("/system");
+
+        mount_fstab_recs_.erase(system_partition);
+    }
+
+    for (auto fstab_rec : mount_fstab_recs_) {
+        if (!MountPartition(fstab_rec) && !fs_mgr_is_nofail(fstab_rec)) {
+            return false;
+        }
+    }
+
     fs_mgr_overlayfs_mount_all();
+
     return true;
 }
 
diff --git a/init/switch_root.cpp b/init/switch_root.cpp
new file mode 100644
index 0000000..0e59b57
--- /dev/null
+++ b/init/switch_root.cpp
@@ -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.
+ */
+
+#include "switch_root.h"
+
+#include <dirent.h>
+#include <fcntl.h>
+#include <mntent.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <android-base/logging.h>
+#include <android-base/strings.h>
+
+using android::base::StartsWith;
+
+using namespace std::literals;
+
+namespace android {
+namespace init {
+
+namespace {
+
+void FreeRamdisk(DIR* dir, dev_t dev) {
+    int dfd = dirfd(dir);
+
+    dirent* de;
+    while ((de = readdir(dir)) != nullptr) {
+        if (de->d_name == "."s || de->d_name == ".."s) {
+            continue;
+        }
+
+        bool is_dir = false;
+
+        if (de->d_type == DT_DIR || de->d_type == DT_UNKNOWN) {
+            struct stat info;
+            if (fstatat(dfd, de->d_name, &info, AT_SYMLINK_NOFOLLOW) != 0) {
+                continue;
+            }
+
+            if (info.st_dev != dev) {
+                continue;
+            }
+
+            if (S_ISDIR(info.st_mode)) {
+                is_dir = true;
+                auto fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY);
+                if (fd >= 0) {
+                    auto subdir =
+                            std::unique_ptr<DIR, decltype(&closedir)>{fdopendir(fd), closedir};
+                    if (subdir) {
+                        FreeRamdisk(subdir.get(), dev);
+                    } else {
+                        close(fd);
+                    }
+                }
+            }
+        }
+        unlinkat(dfd, de->d_name, is_dir ? AT_REMOVEDIR : 0);
+    }
+}
+
+std::vector<std::string> GetMounts(const std::string& new_root) {
+    auto fp = std::unique_ptr<std::FILE, decltype(&endmntent)>{setmntent("/proc/mounts", "re"),
+                                                               endmntent};
+    if (fp == nullptr) {
+        PLOG(FATAL) << "Failed to open /proc/mounts";
+    }
+
+    std::vector<std::string> result;
+    mntent* mentry;
+    while ((mentry = getmntent(fp.get())) != nullptr) {
+        // We won't try to move rootfs.
+        if (mentry->mnt_dir == "/"s) {
+            continue;
+        }
+
+        // The new root mount is handled separately.
+        if (mentry->mnt_dir == new_root) {
+            continue;
+        }
+
+        // Move operates on subtrees, so do not try to move children of other mounts.
+        if (std::find_if(result.begin(), result.end(), [&mentry](const auto& older_mount) {
+                return StartsWith(mentry->mnt_dir, older_mount);
+            }) != result.end()) {
+            continue;
+        }
+
+        result.emplace_back(mentry->mnt_dir);
+    }
+
+    return result;
+}
+
+}  // namespace
+
+void SwitchRoot(const std::string& new_root) {
+    auto mounts = GetMounts(new_root);
+
+    for (const auto& mount_path : mounts) {
+        auto new_mount_path = new_root + mount_path;
+        if (mount(mount_path.c_str(), new_mount_path.c_str(), nullptr, MS_MOVE, nullptr) != 0) {
+            PLOG(FATAL) << "Unable to move mount at '" << mount_path << "'";
+        }
+    }
+
+    auto old_root_dir = std::unique_ptr<DIR, decltype(&closedir)>{opendir("/"), closedir};
+    if (!old_root_dir) {
+        PLOG(ERROR) << "Could not opendir(\"/\"), not freeing ramdisk";
+    }
+
+    struct stat old_root_info;
+    if (stat("/", &old_root_info) != 0) {
+        PLOG(ERROR) << "Could not stat(\"/\"), not freeing ramdisk";
+        old_root_dir.reset();
+    }
+
+    if (chdir(new_root.c_str()) != 0) {
+        PLOG(FATAL) << "Could not chdir to new_root, '" << new_root << "'";
+    }
+
+    if (mount(new_root.c_str(), "/", nullptr, MS_MOVE, nullptr) != 0) {
+        PLOG(FATAL) << "Unable to move root mount to new_root, '" << new_root << "'";
+    }
+
+    if (chroot(".") != 0) {
+        PLOG(FATAL) << "Unable to chroot to new root";
+    }
+
+    if (old_root_dir) {
+        FreeRamdisk(old_root_dir.get(), old_root_info.st_dev);
+    }
+}
+
+}  // namespace init
+}  // namespace android
diff --git a/init/switch_root.h b/init/switch_root.h
new file mode 100644
index 0000000..d515e5d
--- /dev/null
+++ b/init/switch_root.h
@@ -0,0 +1,27 @@
+/*
+ * 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>
+
+namespace android {
+namespace init {
+
+void SwitchRoot(const std::string& new_root);
+
+}  // namespace init
+}  // namespace android
diff --git a/libbacktrace/Android.bp b/libbacktrace/Android.bp
index a10e636..c42ae49 100644
--- a/libbacktrace/Android.bp
+++ b/libbacktrace/Android.bp
@@ -89,29 +89,20 @@
                 "libbase",
                 "liblog",
                 "libunwindstack",
-                "libdexfile",
             ],
 
             static_libs: [
                 "libprocinfo",
             ],
-
-            // libdexfile will eventually properly export headers, for now
-            // include these directly.
-            include_dirs: [
-                "art/runtime",
-            ],
         },
         android: {
             static_libs: ["libasync_safe"],
         },
         vendor: {
             cflags: ["-DNO_LIBDEXFILE_SUPPORT"],
-            exclude_shared_libs: ["libdexfile"],
         },
         recovery: {
             cflags: ["-DNO_LIBDEXFILE_SUPPORT"],
-            exclude_shared_libs: ["libdexfile"],
         },
     },
     whole_static_libs: ["libdemangle"],
@@ -154,7 +145,6 @@
     shared_libs: [
         "libbacktrace_test",
         "libbacktrace",
-        "libdexfile",
         "libbase",
         "liblog",
         "libunwindstack",
@@ -174,12 +164,6 @@
         },
     },
 
-    // libdexfile will eventually properly export headers, for now
-    // include these directly.
-    include_dirs: [
-        "art/runtime",
-    ],
-
     test_suites: ["device-tests"],
     data: [
         "testdata/arm/*",
diff --git a/libcutils/tests/sched_policy_test.cpp b/libcutils/tests/sched_policy_test.cpp
index 5942ee5..1f657e2 100644
--- a/libcutils/tests/sched_policy_test.cpp
+++ b/libcutils/tests/sched_policy_test.cpp
@@ -67,6 +67,21 @@
 }
 
 TEST(SchedPolicy, set_sched_policy) {
+    if (!schedboost_enabled()) {
+        // schedboost_enabled() (i.e. CONFIG_CGROUP_SCHEDTUNE) is optional;
+        // it's only needed on devices using energy-aware scheduler.
+        GTEST_LOG_(INFO) << "skipping test that requires CONFIG_CGROUP_SCHEDTUNE";
+        return;
+    }
+
+    ASSERT_EQ(0, set_sched_policy(0, SP_BACKGROUND));
+    AssertPolicy(SP_BACKGROUND);
+
+    ASSERT_EQ(0, set_sched_policy(0, SP_FOREGROUND));
+    AssertPolicy(SP_FOREGROUND);
+}
+
+TEST(SchedPolicy, set_sched_policy_timerslack) {
     if (!hasCapSysNice()) {
         GTEST_LOG_(INFO) << "skipping test that requires CAP_SYS_NICE";
         return;
@@ -82,11 +97,9 @@
     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);
 }
diff --git a/libmemunreachable/MemUnreachable.cpp b/libmemunreachable/MemUnreachable.cpp
index 529a043..b160de9 100644
--- a/libmemunreachable/MemUnreachable.cpp
+++ b/libmemunreachable/MemUnreachable.cpp
@@ -244,7 +244,7 @@
     } else if (mapping_name == "[anon:libc_malloc]") {
       // named malloc mapping
       heap_mappings.emplace_back(*it);
-    } else if (has_prefix(mapping_name, "/dev/ashmem/dalvik")) {
+    } else if (has_prefix(mapping_name, "[anon:dalvik-")) {
       // named dalvik heap mapping
       globals_mappings.emplace_back(*it);
     } else if (has_prefix(mapping_name, "[stack")) {
diff --git a/libpixelflinger/Android.mk b/libpixelflinger/Android.mk
index c7306cd..14883f4 100644
--- a/libpixelflinger/Android.mk
+++ b/libpixelflinger/Android.mk
@@ -72,8 +72,7 @@
 LOCAL_SRC_FILES_mips64 := $(PIXELFLINGER_SRC_FILES_mips64)
 LOCAL_CFLAGS := $(PIXELFLINGER_CFLAGS)
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
-LOCAL_C_INCLUDES += $(LOCAL_EXPORT_C_INCLUDE_DIRS) \
-		    external/safe-iop/include
+LOCAL_C_INCLUDES += $(LOCAL_EXPORT_C_INCLUDE_DIRS)
 LOCAL_SHARED_LIBRARIES := libcutils liblog libutils
 
 include $(BUILD_SHARED_LIBRARY)
diff --git a/libpixelflinger/arch-arm64/t32cb16blend.S b/libpixelflinger/arch-arm64/t32cb16blend.S
index b1a950d..a9733c0 100644
--- a/libpixelflinger/arch-arm64/t32cb16blend.S
+++ b/libpixelflinger/arch-arm64/t32cb16blend.S
@@ -49,7 +49,7 @@
  *      upper 16-bit pixels in DREG into FB
  *
  *
- * clobbered: w6, w7, w16, w17, w18
+ * clobbered: w6, w7, w15, w16, w17
  *
  */
 
@@ -73,8 +73,8 @@
     add     w16, w6, w16, lsr #8
     cmp     w16, #0x1F
     orr     w17, \FB, #(0x1F<<(16 + 11))
-    orr     w18, \FB, w16, lsl #(16 + 11)
-    csel    \FB, w17, w18, hi
+    orr     w15, \FB, w16, lsl #(16 + 11)
+    csel    \FB, w17, w15, hi
         // green
         and     w6, \DREG, #(0x3F<<(16 + 5))
         lsr     w17,w6,#(16+5)
@@ -84,8 +84,8 @@
         add     w6, w16, w6, lsr #8
         cmp     w6, #0x3F
         orr     w17, \FB, #(0x3F<<(16 + 5))
-        orr     w18, \FB, w6, lsl #(16 + 5)
-        csel    \FB, w17, w18, hi
+        orr     w15, \FB, w6, lsl #(16 + 5)
+        csel    \FB, w17, w15, hi
             // blue
             and     w16, \DREG, #(0x1F << 16)
             lsr     w17,w16,#16
@@ -95,8 +95,8 @@
             add     w16, w6, w16, lsr #8
             cmp     w16, #0x1F
             orr     w17, \FB, #(0x1F << 16)
-            orr     w18, \FB, w16, lsl #16
-            csel    \FB, w17, w18, hi
+            orr     w15, \FB, w16, lsl #16
+            csel    \FB, w17, w15, hi
 
 .else //Blending even pixel present in bottom 16 bits of DREG register
 
@@ -109,8 +109,8 @@
     add     w16, w6, w16, lsr #8
     cmp     w16, #0x1F
     mov     w17, #(0x1F<<11)
-    lsl     w18, w16, #11
-    csel    \FB, w17, w18, hi
+    lsl     w15, w16, #11
+    csel    \FB, w17, w15, hi
 
 
         // green
@@ -121,8 +121,8 @@
         add     w6, w16, w6, lsr #(5+8)
         cmp     w6, #0x3F
         orr     w17, \FB, #(0x3F<<5)
-        orr     w18, \FB, w6, lsl #5
-        csel    \FB, w17, w18, hi
+        orr     w15, \FB, w6, lsl #5
+        csel    \FB, w17, w15, hi
 
             // blue
             and     w16, \DREG, #0x1F
@@ -132,8 +132,8 @@
             add     w16, w6, w16, lsr #8
             cmp     w16, #0x1F
             orr     w17, \FB, #0x1F
-            orr     w18, \FB, w16
-            csel    \FB, w17, w18, hi
+            orr     w15, \FB, w16
+            csel    \FB, w17, w15, hi
 
 .endif // End of blending even pixel
 
diff --git a/libprocinfo/process_map_test.cpp b/libprocinfo/process_map_test.cpp
index 900fd85..4b93c5b 100644
--- a/libprocinfo/process_map_test.cpp
+++ b/libprocinfo/process_map_test.cpp
@@ -44,7 +44,7 @@
   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[0].name, "[anon:dalvik-main space (region space)]");
   ASSERT_EQ(maps[876].start, 0x70e6c4f000ULL);
   ASSERT_EQ(maps[876].end, 0x70e6c6b000ULL);
   ASSERT_EQ(maps[876].flags, PROT_READ | PROT_EXEC);
@@ -55,6 +55,6 @@
   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)");
+            "[anon:dalvik-classes.dex extracted in memory from "
+            "/data/app/com.google.sample.tunnel-HGGRU03Gu1Mwkf_-RnFmvw==/base.apk]");
 }
diff --git a/libprocinfo/testdata/maps b/libprocinfo/testdata/maps
index 3b312e3..098cf25 100644
--- a/libprocinfo/testdata/maps
+++ b/libprocinfo/testdata/maps
@@ -1,4 +1,4 @@
-12c00000-2ac00000 rw-p 00000000 00:05 10267643                           /dev/ashmem/dalvik-main space (region space) (deleted)
+12c00000-2ac00000 rw-p 00000000 00:05 10267643                           [anon:dalvik-main space (region space)]
 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
@@ -121,12 +121,12 @@
 73b88000-73b89000 r--s 00000000 fc:00 884                                /system/framework/boot-com.google.vr.platform.vdex
 73b89000-73b8a000 r--p 00004000 fc:00 899                                /system/framework/arm64/boot-com.google.vr.platform.oat
 73b8a000-73b8b000 rw-p 00005000 fc:00 899                                /system/framework/arm64/boot-com.google.vr.platform.oat
-73b8b000-73b93000 rw-p 00000000 00:05 10267640                           /dev/ashmem/dalvik-non moving space (deleted)
-73b93000-77b8b000 ---p 00008000 00:05 10267640                           /dev/ashmem/dalvik-non moving space (deleted)
-77b8b000-97b8b000 rw-p 00000000 00:05 10267645                           /dev/ashmem/dalvik-free list large object space (deleted)
-97b8b000-99b8b000 rw-p 00000000 00:05 10270989                           /dev/ashmem/dalvik-data-code-cache (deleted)
-99b8b000-9bb8b000 r-xp 00000000 00:05 10270990                           /dev/ashmem/dalvik-jit-code-cache (deleted)
-ebad6000-ebad7000 ---p 00000000 00:05 10269717                           /dev/ashmem/dalvik-Sentinel fault page (deleted)
+73b8b000-73b93000 rw-p 00000000 00:05 10267640                           [anon:dalvik-non moving space]
+73b93000-77b8b000 ---p 00008000 00:05 10267640                           [anon:dalvik-non moving space]
+77b8b000-97b8b000 rw-p 00000000 00:05 10267645                           [anon:dalvik-free list large object space]
+97b8b000-99b8b000 rw-p 00000000 00:05 10270989                           [anon:dalvik-data-code-cache]
+99b8b000-9bb8b000 r-xp 00000000 00:05 10270990                           [anon:dalvik-jit-code-cache]
+ebad6000-ebad7000 ---p 00000000 00:05 10269717                           [anon:dalvik-Sentinel fault page]
 7ffb6e000-7ffb76000 rw-s 000e5000 00:10 20630                            /dev/kgsl-3d0
 7ffb76000-7ffb78000 rw-s 000e0000 00:10 20630                            /dev/kgsl-3d0
 7ffbc3000-7ffbc4000 rw-s 000e8000 00:10 20630                            /dev/kgsl-3d0
@@ -453,7 +453,7 @@
 7058043000-7058044000 r--p 0002f000 fc:00 2354                           /system/lib64/libcompiler_rt.so
 7058044000-7058045000 rw-p 00030000 fc:00 2354                           /system/lib64/libcompiler_rt.so
 7058045000-70580b2000 rw-p 00000000 00:00 0                              [anon:.bss]
-70580bd000-70580dd000 rw-p 00000000 00:05 10265386                       /dev/ashmem/dalvik-LinearAlloc (deleted)
+70580bd000-70580dd000 rw-p 00000000 00:05 10265386                       [anon:dalvik-LinearAlloc]
 70580dd000-70580df000 r-xp 00000000 fc:00 2597                           /system/lib64/vndk-sp-28/libhardware.so
 70580df000-70580fc000 ---p 00000000 00:00 0 
 70580fc000-70580fd000 r--p 0000f000 fc:00 2597                           /system/lib64/vndk-sp-28/libhardware.so
@@ -568,9 +568,9 @@
 705fe4c000-705fe4d000 ---p 00000000 00:00 0                              [anon:thread stack guard]
 705fe4d000-705fe4e000 ---p 00000000 00:00 0 
 705fe4e000-705ff4a000 rw-p 00000000 00:00 0 
-705ff4a000-705ff4b000 ---p 00000000 00:05 10270991                       /dev/ashmem/dalvik-Jit thread pool worker thread 0 (deleted)
-705ff4b000-705ff4c000 ---p 00001000 00:05 10270991                       /dev/ashmem/dalvik-Jit thread pool worker thread 0 (deleted)
-705ff4c000-706004b000 rw-p 00002000 00:05 10270991                       /dev/ashmem/dalvik-Jit thread pool worker thread 0 (deleted)
+705ff4a000-705ff4b000 ---p 00000000 00:05 10270991                       [anon:dalvik-Jit thread pool worker thread 0]
+705ff4b000-705ff4c000 ---p 00001000 00:05 10270991                       [anon:dalvik-Jit thread pool worker thread 0]
+705ff4c000-706004b000 rw-p 00002000 00:05 10270991                       [anon:dalvik-Jit thread pool worker thread 0]
 706004b000-706010f000 r-xp 00000000 fc:00 2390                           /system/lib64/libvixl-arm64.so
 706010f000-7060120000 ---p 00000000 00:00 0 
 7060120000-7060125000 r--p 000cb000 fc:00 2390                           /system/lib64/libvixl-arm64.so
@@ -635,12 +635,12 @@
 7062003000-706201f000 ---p 00000000 00:00 0 
 706201f000-7062020000 r--p 0000f000 fc:00 2447                           /system/lib64/libtextclassifier_hash.so
 7062020000-7062021000 rw-p 00010000 fc:00 2447                           /system/lib64/libtextclassifier_hash.so
-7062022000-7062042000 rw-p 00000000 00:05 10269731                       /dev/ashmem/dalvik-CompilerMetadata (deleted)
+7062022000-7062042000 rw-p 00000000 00:05 10269731                       [anon:dalvik-CompilerMetadata]
 7062042000-7062077000 r-xp 00000000 fc:00 2372                           /system/lib64/android.hardware.neuralnetworks@1.0.so
 7062077000-7062095000 ---p 00000000 00:00 0 
 7062095000-706209b000 r--p 0003a000 fc:00 2372                           /system/lib64/android.hardware.neuralnetworks@1.0.so
 706209b000-706209c000 rw-p 00040000 fc:00 2372                           /system/lib64/android.hardware.neuralnetworks@1.0.so
-70620a9000-70620c9000 rw-p 00000000 00:05 10269730                       /dev/ashmem/dalvik-CompilerMetadata (deleted)
+70620a9000-70620c9000 rw-p 00000000 00:05 10269730                       [anon:dalvik-CompilerMetadata]
 70620c9000-70620e3000 r-xp 00000000 fc:00 2956                           /system/lib64/android.hardware.neuralnetworks@1.1.so
 70620e3000-70620f4000 ---p 00000000 00:00 0 
 70620f4000-70620f7000 r--p 0001d000 fc:00 2956                           /system/lib64/android.hardware.neuralnetworks@1.1.so
@@ -659,7 +659,7 @@
 70623e0000-70623f7000 ---p 00000000 00:00 0 
 70623f7000-70623f8000 r--p 0001f000 fc:00 2662                           /system/lib64/libGLESv3.so
 70623f8000-70623f9000 rw-p 00020000 fc:00 2662                           /system/lib64/libGLESv3.so
-70623fc000-706241c000 rw-p 00000000 00:05 10269729                       /dev/ashmem/dalvik-CompilerMetadata (deleted)
+70623fc000-706241c000 rw-p 00000000 00:05 10269729                       [anon:dalvik-CompilerMetadata]
 706241c000-7062444000 r-xp 00000000 fc:00 2603                           /system/lib64/libexif.so
 7062444000-706245f000 ---p 00000000 00:00 0 
 706245f000-7062472000 r--p 0002d000 fc:00 2603                           /system/lib64/libexif.so
@@ -674,7 +674,7 @@
 7062508000-7062522000 ---p 00000000 00:00 0 
 7062522000-7062525000 r--p 0003d000 fc:00 2401                           /system/lib64/libmtp.so
 7062525000-706252c000 rw-p 00040000 fc:00 2401                           /system/lib64/libmtp.so
-7062530000-7062550000 rw-p 00000000 00:05 10269728                       /dev/ashmem/dalvik-CompilerMetadata (deleted)
+7062530000-7062550000 rw-p 00000000 00:05 10269728                       [anon:dalvik-CompilerMetadata]
 7062550000-7062572000 r--s 00000000 fc:00 234                            /system/fonts/NotoSerifMyanmar-Regular.otf
 7062572000-706259e000 r-xp 00000000 fc:00 2620                           /system/lib64/libmediandk.so
 706259e000-70625b9000 ---p 00000000 00:00 0 
@@ -688,7 +688,7 @@
 7062621000-706263d000 ---p 00000000 00:00 0 
 706263d000-706263f000 r--p 0002e000 fc:00 2366                           /system/lib64/libmediadrmmetrics_lite.so
 706263f000-7062640000 rw-p 00030000 fc:00 2366                           /system/lib64/libmediadrmmetrics_lite.so
-706264b000-706266b000 rw-p 00000000 00:05 10269727                       /dev/ashmem/dalvik-CompilerMetadata (deleted)
+706264b000-706266b000 rw-p 00000000 00:05 10269727                       [anon:dalvik-CompilerMetadata]
 706266b000-70626d4000 r-xp 00000000 fc:00 2727                           /system/lib64/libmedia_jni.so
 70626d4000-70626eb000 ---p 00000000 00:00 0 
 70626eb000-70626f2000 r--p 00069000 fc:00 2727                           /system/lib64/libmedia_jni.so
@@ -697,7 +697,7 @@
 7062732000-7062748000 ---p 00000000 00:00 0 
 7062748000-706274b000 r--p 0003d000 fc:00 2399                           /system/lib64/libcamera2ndk.so
 706274b000-7062750000 rw-p 00040000 fc:00 2399                           /system/lib64/libcamera2ndk.so
-7062768000-7062788000 rw-p 00000000 00:05 10269726                       /dev/ashmem/dalvik-CompilerMetadata (deleted)
+7062768000-7062788000 rw-p 00000000 00:05 10269726                       [anon:dalvik-CompilerMetadata]
 7062788000-70627ee000 r-xp 00000000 fc:00 2974                           /system/lib64/android.hardware.drm@1.0.so
 70627ee000-7062805000 ---p 00000000 00:00 0 
 7062805000-706280d000 r--p 00068000 fc:00 2974                           /system/lib64/android.hardware.drm@1.0.so
@@ -737,17 +737,17 @@
 70629f9000-70629fc000 rw-p 00000000 00:00 0                              [anon:bionic TLS]
 70629fc000-70629fd000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
 70629fd000-7062a3e000 r--s 00000000 fc:00 216                            /system/fonts/NotoSerif-BoldItalic.ttf
-7062a3e000-7062b06000 rw-p 00000000 00:05 10270984                       /dev/ashmem/dalvik-indirect ref table (deleted)
-7062b06000-7062bce000 rw-p 00000000 00:05 10270983                       /dev/ashmem/dalvik-indirect ref table (deleted)
-7062bce000-7062dce000 rw-p 00000000 00:05 10270726                       /dev/ashmem/dalvik-rb copying gc mark stack (deleted)
-7062dce000-70635ce000 rw-p 00000000 00:05 10270725                       /dev/ashmem/dalvik-concurrent copying gc mark stack (deleted)
-70635ce000-7063dcf000 rw-p 00000000 00:05 10270724                       /dev/ashmem/dalvik-live stack (deleted)
-7063dcf000-70645d0000 rw-p 00000000 00:05 10270723                       /dev/ashmem/dalvik-allocation stack (deleted)
-70645d0000-70649d1000 rw-p 00000000 00:05 10270721                       /dev/ashmem/dalvik-card table (deleted)
-70649d1000-7064ad1000 rw-p 00000000 00:05 10267648                       /dev/ashmem/dalvik-large object free list space allocation info map (deleted)
-7064ad1000-7065ad1000 rw-p 00000000 00:05 10267644                       /dev/ashmem/dalvik-region space live bitmap (deleted)
-7065ad1000-7065bd1000 rw-p 00000000 00:05 10267642                       /dev/ashmem/dalvik-allocspace zygote / non moving space mark-bitmap 0 (deleted)
-7065bd1000-7065cd1000 rw-p 00000000 00:05 10267641                       /dev/ashmem/dalvik-allocspace zygote / non moving space live-bitmap 0 (deleted)
+7062a3e000-7062b06000 rw-p 00000000 00:05 10270984                       [anon:dalvik-indirect ref table]
+7062b06000-7062bce000 rw-p 00000000 00:05 10270983                       [anon:dalvik-indirect ref table]
+7062bce000-7062dce000 rw-p 00000000 00:05 10270726                       [anon:dalvik-rb copying gc mark stack]
+7062dce000-70635ce000 rw-p 00000000 00:05 10270725                       [anon:dalvik-concurrent copying gc mark stack]
+70635ce000-7063dcf000 rw-p 00000000 00:05 10270724                       [anon:dalvik-live stack]
+7063dcf000-70645d0000 rw-p 00000000 00:05 10270723                       [anon:dalvik-allocation stack]
+70645d0000-70649d1000 rw-p 00000000 00:05 10270721                       [anon:dalvik-card table]
+70649d1000-7064ad1000 rw-p 00000000 00:05 10267648                       [anon:dalvik-large object free list space allocation info map]
+7064ad1000-7065ad1000 rw-p 00000000 00:05 10267644                       [anon:dalvik-region space live bitmap]
+7065ad1000-7065bd1000 rw-p 00000000 00:05 10267642                       [anon:dalvik-allocspace zygote / non moving space mark-bitmap 0]
+7065bd1000-7065cd1000 rw-p 00000000 00:05 10267641                       [anon:dalvik-allocspace zygote / non moving space live-bitmap 0]
 7065cd1000-7065cd2000 r-xp 00000000 fc:00 2946                           /system/lib64/libsigchain.so
 7065cd2000-7065cf0000 ---p 00000000 00:00 0 
 7065cf0000-7065cf1000 r--p 0000f000 fc:00 2946                           /system/lib64/libsigchain.so
@@ -769,7 +769,7 @@
 706638d000-706639e000 r--p 005ef000 fc:00 2671                           /system/lib64/libart.so
 706639e000-70663a1000 rw-p 00600000 fc:00 2671                           /system/lib64/libart.so
 70663a1000-70663a4000 rw-p 00000000 00:00 0                              [anon:.bss]
-70663a6000-70663c6000 rw-p 00000000 00:05 10269725                       /dev/ashmem/dalvik-CompilerMetadata (deleted)
+70663a6000-70663c6000 rw-p 00000000 00:05 10269725                       [anon:dalvik-CompilerMetadata]
 70663c6000-70663c8000 r-xp 00000000 fc:00 2673                           /system/lib64/libmetricslogger.so
 70663c8000-70663e5000 ---p 00000000 00:00 0 
 70663e5000-70663e6000 r--p 0000f000 fc:00 2673                           /system/lib64/libmetricslogger.so
@@ -801,8 +801,8 @@
 70e688e000-70e68ab000 ---p 00000000 00:00 0 
 70e68ab000-70e68ac000 r--p 0000f000 fc:00 2943                           /system/lib64/libion.so
 70e68ac000-70e68ad000 rw-p 00010000 fc:00 2943                           /system/lib64/libion.so
-70e68ad000-70e68af000 rw-p 00000000 00:05 10282496                       /dev/ashmem/dalvik-indirect ref table (deleted)
-70e68af000-70e68b1000 rw-p 00000000 00:05 10282493                       /dev/ashmem/dalvik-indirect ref table (deleted)
+70e68ad000-70e68af000 rw-p 00000000 00:05 10282496                       [anon:dalvik-indirect ref table]
+70e68af000-70e68b1000 rw-p 00000000 00:05 10282493                       [anon:dalvik-indirect ref table]
 70e68b1000-70e68ee000 r--s 00000000 fc:00 256                            /system/fonts/NotoSerif-Italic.ttf
 70e68ee000-70e6910000 r-xp 00000000 fc:00 2502                           /system/lib64/libhidlbase.so
 70e6910000-70e692c000 ---p 00000000 00:00 0 
@@ -821,7 +821,7 @@
 70e69e1000-70e69fa000 ---p 00000000 00:00 0 
 70e69fa000-70e69fb000 r--p 0001f000 fc:00 2537                           /system/lib64/liblog.so
 70e69fb000-70e69fc000 rw-p 00020000 fc:00 2537                           /system/lib64/liblog.so
-70e69fc000-70e69fe000 rw-p 00000000 00:05 10266158                       /dev/ashmem/dalvik-indirect ref table (deleted)
+70e69fc000-70e69fe000 rw-p 00000000 00:05 10266158                       [anon:dalvik-indirect ref table]
 70e69fe000-70e69ff000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
 70e69ff000-70e6a02000 rw-p 00000000 00:00 0                              [anon:bionic TLS]
 70e6a02000-70e6a03000 ---p 00000000 00:00 0                              [anon:bionic TLS guard]
@@ -854,7 +854,7 @@
 70e6b61000-70e6b73000 ---p 00000000 00:00 0 
 70e6b73000-70e6b75000 r--p 0003e000 fc:00 2695                           /system/lib64/libdexfile.so
 70e6b75000-70e6b76000 rw-p 00040000 fc:00 2695                           /system/lib64/libdexfile.so
-70e6b76000-70e6b78000 rw-p 00000000 00:05 10253452                       /dev/ashmem/dalvik-indirect ref table (deleted)
+70e6b76000-70e6b78000 rw-p 00000000 00:05 10253452                       [anon:dalvik-indirect ref table]
 70e6b78000-70e6b85000 r--s 00000000 fc:00 1080                           /system/usr/hyphen-data/hyph-cu.hyb
 70e6b85000-70e6b96000 r-xp 00000000 fc:00 2957                           /system/lib64/libaudioutils.so
 70e6b96000-70e6bb4000 ---p 00000000 00:00 0 
@@ -1258,7 +1258,7 @@
 70e96dd000-70e96f8000 ---p 00000000 00:00 0 
 70e96f8000-70e96f9000 r--p 0000f000 fc:00 2386                           /system/lib64/libusbhost.so
 70e96f9000-70e96fa000 rw-p 00010000 fc:00 2386                           /system/lib64/libusbhost.so
-70e96fa000-70e96fb000 r--p 00000000 00:05 10266154                       /dev/ashmem/dalvik-classes.dex extracted in memory from /data/app/com.google.sample.tunnel-HGGRU03Gu1Mwkf_-RnFmvw==/base.apk (deleted)
+70e96fa000-70e96fb000 r--p 00000000 00:05 10266154                       [anon:dalvik-classes.dex extracted in memory from /data/app/com.google.sample.tunnel-HGGRU03Gu1Mwkf_-RnFmvw==/base.apk]
 70e96fb000-70e9701000 r--s 00000000 fc:00 280                            /system/fonts/NotoSansCoptic-Regular.ttf
 70e9701000-70e9720000 r-xp 00000000 fc:00 2490                           /system/lib64/libstagefright_bufferqueue_helper.so
 70e9720000-70e973b000 ---p 00000000 00:00 0 
@@ -1291,7 +1291,7 @@
 70e98e7000-70e98e8000 rw-p 00010000 fc:00 2952                           /system/lib64/libETC1.so
 70e98e8000-70e98e9000 r--s 00000000 fc:00 1121                           /system/usr/hyphen-data/hyph-und-ethi.hyb
 70e98e9000-70e98ef000 r--s 00000000 fc:00 64                             /system/fonts/NotoSansBrahmi-Regular.ttf
-70e98ef000-70e990f000 rw-p 00000000 00:05 10271012                       /dev/ashmem/dalvik-CompilerMetadata (deleted)
+70e98ef000-70e990f000 rw-p 00000000 00:05 10271012                       [anon:dalvik-CompilerMetadata]
 70e990f000-70e9926000 r-xp 00000000 fc:00 2526                           /system/lib64/libbacktrace.so
 70e9926000-70e993e000 ---p 00000000 00:00 0 
 70e993e000-70e993f000 r--p 0001f000 fc:00 2526                           /system/lib64/libbacktrace.so
@@ -1304,7 +1304,7 @@
 70e99d0000-70e99d1000 r--p 00000000 00:00 0                              [anon:linker_alloc]
 70e99d1000-70e99d3000 r--s 00000000 fc:00 200                            /system/fonts/NotoSansOldItalic-Regular.ttf
 70e99d3000-70e99e1000 r--s 00000000 fc:00 153                            /system/fonts/NotoSansMalayalam-Regular.ttf
-70e99e1000-70e9a01000 rw-p 00000000 00:05 10271011                       /dev/ashmem/dalvik-CompilerMetadata (deleted)
+70e99e1000-70e9a01000 rw-p 00000000 00:05 10271011                       [anon:dalvik-CompilerMetadata]
 70e9a01000-70e9a1e000 r-xp 00000000 fc:00 2542                           /system/lib64/libimg_utils.so
 70e9a1e000-70e9a39000 ---p 00000000 00:00 0 
 70e9a39000-70e9a3c000 r--p 0001d000 fc:00 2542                           /system/lib64/libimg_utils.so
@@ -1330,7 +1330,7 @@
 70e9b0b000-70e9b0c000 rw-p 00030000 fc:00 2950                           /system/lib64/libmemunreachable.so
 70e9b0c000-70e9b0d000 r--s 00000000 fc:00 1088                           /system/usr/hyphen-data/hyph-ta.hyb
 70e9b0d000-70e9b0f000 r--s 00000000 fc:00 72                             /system/fonts/NotoSansOlChiki-Regular.ttf
-70e9b0f000-70e9b2f000 rw-p 00000000 00:05 10271010                       /dev/ashmem/dalvik-CompilerMetadata (deleted)
+70e9b0f000-70e9b2f000 rw-p 00000000 00:05 10271010                       [anon:dalvik-CompilerMetadata]
 70e9b2f000-70e9b4f000 r--s 00000000 00:10 16633                          /dev/__properties__/u:object_r:persist_debug_prop:s0
 70e9b4f000-70e9b65000 r-xp 00000000 fc:00 2920                           /system/lib64/android.hardware.cas.native@1.0.so
 70e9b65000-70e9b7b000 ---p 00000000 00:00 0 
@@ -1363,13 +1363,13 @@
 70e9d01000-70e9d1e000 ---p 00000000 00:00 0 
 70e9d1e000-70e9d2e000 r--p 00080000 fc:00 2665                           /system/lib64/libbinder.so
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@@ -1437,15 +1437,15 @@
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@@ -1453,7 +1453,7 @@
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@@ -1468,7 +1468,7 @@
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@@ -1503,7 +1503,7 @@
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@@ -1579,395 +1579,395 @@
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 70ebbf8000-70ebbf9000 r--p 00000000 00:00 0                              [anon:linker_alloc]
 70ebbf9000-70ebbfa000 r--s 00000000 fc:00 968                            /system/framework/bouncycastle.jar
-70ebbfa000-70ebbfc000 rw-p 00000000 00:05 10270992                       /dev/ashmem/dalvik-indirect ref table (deleted)
-70ebbfc000-70ebc00000 rw-p 00000000 00:05 10270757                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebc00000-70ebc04000 rw-p 00000000 00:05 10270756                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebc04000-70ebc08000 rw-p 00000000 00:05 10270755                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebc08000-70ebc0c000 rw-p 00000000 00:05 10270754                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebc0c000-70ebc10000 rw-p 00000000 00:05 10270753                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebc10000-70ebc14000 rw-p 00000000 00:05 10270752                       /dev/ashmem/dalvik-thread local mark stack (deleted)
+70ebbfa000-70ebbfc000 rw-p 00000000 00:05 10270992                       [anon:dalvik-indirect ref table]
+70ebbfc000-70ebc00000 rw-p 00000000 00:05 10270757                       [anon:dalvik-thread local mark stack]
+70ebc00000-70ebc04000 rw-p 00000000 00:05 10270756                       [anon:dalvik-thread local mark stack]
+70ebc04000-70ebc08000 rw-p 00000000 00:05 10270755                       [anon:dalvik-thread local mark stack]
+70ebc08000-70ebc0c000 rw-p 00000000 00:05 10270754                       [anon:dalvik-thread local mark stack]
+70ebc0c000-70ebc10000 rw-p 00000000 00:05 10270753                       [anon:dalvik-thread local mark stack]
+70ebc10000-70ebc14000 rw-p 00000000 00:05 10270752                       [anon:dalvik-thread local mark stack]
 70ebc14000-70ebc15000 rw-p 00000000 00:00 0                              [anon:linker_alloc]
 70ebc15000-70ebc16000 r--s 00000000 fc:00 960                            /system/framework/okhttp.jar
-70ebc16000-70ebc1a000 rw-p 00000000 00:05 10270751                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebc1a000-70ebc1e000 rw-p 00000000 00:05 10270750                       /dev/ashmem/dalvik-thread local mark stack (deleted)
+70ebc16000-70ebc1a000 rw-p 00000000 00:05 10270751                       [anon:dalvik-thread local mark stack]
+70ebc1a000-70ebc1e000 rw-p 00000000 00:05 10270750                       [anon:dalvik-thread local mark stack]
 70ebc1e000-70ebc3e000 r--s 00000000 00:10 16584                          /dev/__properties__/u:object_r:default_prop:s0
 70ebc3e000-70ebc3f000 r--p 00000000 00:00 0                              [anon:linker_alloc]
 70ebc3f000-70ebc40000 r--s 00000000 fc:00 974                            /system/framework/conscrypt.jar
-70ebc40000-70ebc42000 rw-p 00000000 00:05 10269719                       /dev/ashmem/dalvik-indirect ref table (deleted)
-70ebc42000-70ebc46000 rw-p 00000000 00:05 10270749                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebc46000-70ebc4a000 rw-p 00000000 00:05 10270748                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebc4a000-70ebc4e000 rw-p 00000000 00:05 10270747                       /dev/ashmem/dalvik-thread local mark stack (deleted)
+70ebc40000-70ebc42000 rw-p 00000000 00:05 10269719                       [anon:dalvik-indirect ref table]
+70ebc42000-70ebc46000 rw-p 00000000 00:05 10270749                       [anon:dalvik-thread local mark stack]
+70ebc46000-70ebc4a000 rw-p 00000000 00:05 10270748                       [anon:dalvik-thread local mark stack]
+70ebc4a000-70ebc4e000 rw-p 00000000 00:05 10270747                       [anon:dalvik-thread local mark stack]
 70ebc4e000-70ebc4f000 rw-p 00000000 00:00 0                              [anon:linker_alloc]
-70ebc4f000-70ebc51000 rw-p 00000000 00:05 10269718                       /dev/ashmem/dalvik-indirect ref table (deleted)
-70ebc51000-70ebc55000 rw-p 00000000 00:05 10270746                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebc55000-70ebc59000 rw-p 00000000 00:05 10270745                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebc59000-70ebc5d000 rw-p 00000000 00:05 10270744                       /dev/ashmem/dalvik-thread local mark stack (deleted)
+70ebc4f000-70ebc51000 rw-p 00000000 00:05 10269718                       [anon:dalvik-indirect ref table]
+70ebc51000-70ebc55000 rw-p 00000000 00:05 10270746                       [anon:dalvik-thread local mark stack]
+70ebc55000-70ebc59000 rw-p 00000000 00:05 10270745                       [anon:dalvik-thread local mark stack]
+70ebc59000-70ebc5d000 rw-p 00000000 00:05 10270744                       [anon:dalvik-thread local mark stack]
 70ebc5d000-70ebc7d000 r--s 00000000 00:10 16599                          /dev/__properties__/u:object_r:exported_dalvik_prop:s0
 70ebc7d000-70ebc7e000 rw-p 00000000 00:00 0                              [anon:linker_alloc]
 70ebc7e000-70ebc7f000 r--p 00000000 00:00 0                              [anon:linker_alloc]
 70ebc7f000-70ebc80000 r--s 00004000 fc:00 963                            /system/framework/core-libart.jar
 70ebc80000-70ebc81000 r--p 00000000 00:00 0                              [anon:linker_alloc]
-70ebc81000-70ebc85000 rw-p 00000000 00:05 10270743                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebc85000-70ebc89000 rw-p 00000000 00:05 10270742                       /dev/ashmem/dalvik-thread local mark stack (deleted)
+70ebc81000-70ebc85000 rw-p 00000000 00:05 10270743                       [anon:dalvik-thread local mark stack]
+70ebc85000-70ebc89000 rw-p 00000000 00:05 10270742                       [anon:dalvik-thread local mark stack]
 70ebc89000-70ebc8a000 rw-p 00000000 00:00 0                              [anon:linker_alloc_small_objects]
 70ebc8a000-70ebc8c000 r--p 00000000 00:00 0                              [anon:linker_alloc]
 70ebc8c000-70ebc8d000 r--s 0001e000 fc:00 699                            /system/framework/core-oj.jar
-70ebc8d000-70ebc91000 rw-p 00000000 00:05 10270741                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebc91000-70ebc95000 rw-p 00000000 00:05 10270740                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebc95000-70ebc99000 rw-p 00000000 00:05 10270739                       /dev/ashmem/dalvik-thread local mark stack (deleted)
+70ebc8d000-70ebc91000 rw-p 00000000 00:05 10270741                       [anon:dalvik-thread local mark stack]
+70ebc91000-70ebc95000 rw-p 00000000 00:05 10270740                       [anon:dalvik-thread local mark stack]
+70ebc95000-70ebc99000 rw-p 00000000 00:05 10270739                       [anon:dalvik-thread local mark stack]
 70ebc99000-70ebc9b000 r--p 00000000 00:00 0                              [anon:linker_alloc]
 70ebc9b000-70ebc9c000 rw-p 00000000 00:00 0                              [anon:linker_alloc]
-70ebc9c000-70ebca0000 rw-p 00000000 00:05 10270738                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebca0000-70ebca4000 rw-p 00000000 00:05 10270737                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebca4000-70ebca8000 rw-p 00000000 00:05 10270736                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebca8000-70ebcac000 rw-p 00000000 00:05 10270735                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebcac000-70ebcb0000 rw-p 00000000 00:05 10270734                       /dev/ashmem/dalvik-thread local mark stack (deleted)
+70ebc9c000-70ebca0000 rw-p 00000000 00:05 10270738                       [anon:dalvik-thread local mark stack]
+70ebca0000-70ebca4000 rw-p 00000000 00:05 10270737                       [anon:dalvik-thread local mark stack]
+70ebca4000-70ebca8000 rw-p 00000000 00:05 10270736                       [anon:dalvik-thread local mark stack]
+70ebca8000-70ebcac000 rw-p 00000000 00:05 10270735                       [anon:dalvik-thread local mark stack]
+70ebcac000-70ebcb0000 rw-p 00000000 00:05 10270734                       [anon:dalvik-thread local mark stack]
 70ebcb0000-70ebcd0000 r--s 00000000 00:10 16592                          /dev/__properties__/u:object_r:exported2_system_prop:s0
 70ebcd0000-70ebcd1000 rw-p 00000000 00:00 0                              [anon:linker_alloc]
-70ebcd1000-70ebcd5000 rw-p 00000000 00:05 10270733                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebcd5000-70ebcd9000 rw-p 00000000 00:05 10270732                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebcd9000-70ebcdd000 rw-p 00000000 00:05 10270731                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebcdd000-70ebce1000 rw-p 00000000 00:05 10270730                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebce1000-70ebce5000 rw-p 00000000 00:05 10270729                       /dev/ashmem/dalvik-thread local mark stack (deleted)
-70ebce5000-70ebce9000 rw-p 00000000 00:05 10270728                       /dev/ashmem/dalvik-thread local mark stack (deleted)
+70ebcd1000-70ebcd5000 rw-p 00000000 00:05 10270733                       [anon:dalvik-thread local mark stack]
+70ebcd5000-70ebcd9000 rw-p 00000000 00:05 10270732                       [anon:dalvik-thread local mark stack]
+70ebcd9000-70ebcdd000 rw-p 00000000 00:05 10270731                       [anon:dalvik-thread local mark stack]
+70ebcdd000-70ebce1000 rw-p 00000000 00:05 10270730                       [anon:dalvik-thread local mark stack]
+70ebce1000-70ebce5000 rw-p 00000000 00:05 10270729                       [anon:dalvik-thread local mark stack]
+70ebce5000-70ebce9000 rw-p 00000000 00:05 10270728                       [anon:dalvik-thread local mark stack]
 70ebce9000-70ebcea000 r--p 00000000 00:00 0                              [anon:linker_alloc]
-70ebcea000-70ebcec000 rw-p 00000000 00:05 10270987                       /dev/ashmem/dalvik-indirect ref table (deleted)
+70ebcea000-70ebcec000 rw-p 00000000 00:05 10270987                       [anon:dalvik-indirect ref table]
 70ebcec000-70ebcf9000 r--p 00646000 103:1d 639532                        /data/dalvik-cache/arm64/system@framework@boot-framework.art
 70ebcf9000-70ebd19000 r--s 00000000 00:10 16620                          /dev/__properties__/u:object_r:log_tag_prop:s0
 70ebd19000-70ebd39000 r--s 00000000 00:10 16621                          /dev/__properties__/u:object_r:logd_prop:s0
 70ebd39000-70ebd3a000 rw-p 00000000 00:00 0                              [anon:linker_alloc]
 70ebd3a000-70ebd3b000 r--p 00000000 00:00 0                              [anon:linker_alloc]
-70ebd3b000-70ebd3f000 rw-p 00000000 00:05 10270727                       /dev/ashmem/dalvik-thread local mark stack (deleted)
+70ebd3b000-70ebd3f000 rw-p 00000000 00:05 10270727                       [anon:dalvik-thread local mark stack]
 70ebd3f000-70ebd40000 r--p 00002000 103:1d 639556                        /data/dalvik-cache/arm64/system@framework@boot-com.google.vr.platform.art
 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]
diff --git a/libutils/Android.bp b/libutils/Android.bp
index d635e65..1c1bdf7 100644
--- a/libutils/Android.bp
+++ b/libutils/Android.bp
@@ -58,7 +58,6 @@
         "-Wall",
         "-Werror",
     ],
-    include_dirs: ["external/safe-iop/include"],
     header_libs: [
         "libutils_headers",
     ],
diff --git a/libutils/VectorImpl.cpp b/libutils/VectorImpl.cpp
index 00a904d..e16f88d 100644
--- a/libutils/VectorImpl.cpp
+++ b/libutils/VectorImpl.cpp
@@ -24,8 +24,6 @@
 
 #include <log/log.h>
 
-#include <safe_iop.h>
-
 #include "SharedBuffer.h"
 
 /*****************************************************************************/
@@ -342,7 +340,7 @@
     }
 
     size_t new_allocation_size = 0;
-    LOG_ALWAYS_FATAL_IF(!safe_mul(&new_allocation_size, new_capacity, mItemSize));
+    LOG_ALWAYS_FATAL_IF(__builtin_mul_overflow(new_capacity, mItemSize, &new_allocation_size));
     SharedBuffer* sb = SharedBuffer::alloc(new_allocation_size);
     if (sb) {
         void* array = sb->data();
@@ -386,7 +384,7 @@
             this, (int)where, (int)amount, (int)mCount); // caller already checked
 
     size_t new_size;
-    LOG_ALWAYS_FATAL_IF(!safe_add(&new_size, mCount, amount), "new_size overflow");
+    LOG_ALWAYS_FATAL_IF(__builtin_add_overflow(mCount, amount, &new_size), "new_size overflow");
 
     if (capacity() < new_size) {
         // NOTE: This implementation used to resize vectors as per ((3*x + 1) / 2)
@@ -397,17 +395,18 @@
         //
         // This approximates the old calculation, using (x + (x/2) + 1) instead.
         size_t new_capacity = 0;
-        LOG_ALWAYS_FATAL_IF(!safe_add(&new_capacity, new_size, (new_size / 2)),
+        LOG_ALWAYS_FATAL_IF(__builtin_add_overflow(new_size, (new_size / 2), &new_capacity),
                             "new_capacity overflow");
-        LOG_ALWAYS_FATAL_IF(!safe_add(&new_capacity, new_capacity, static_cast<size_t>(1u)),
-                            "new_capacity overflow");
+        LOG_ALWAYS_FATAL_IF(
+                __builtin_add_overflow(new_capacity, static_cast<size_t>(1u), &new_capacity),
+                "new_capacity overflow");
         new_capacity = max(kMinVectorCapacity, new_capacity);
 
         size_t new_alloc_size = 0;
-        LOG_ALWAYS_FATAL_IF(!safe_mul(&new_alloc_size, new_capacity, mItemSize),
+        LOG_ALWAYS_FATAL_IF(__builtin_mul_overflow(new_capacity, mItemSize, &new_alloc_size),
                             "new_alloc_size overflow");
 
-//        ALOGV("grow vector %p, new_capacity=%d", this, (int)new_capacity);
+        // ALOGV("grow vector %p, new_capacity=%d", this, (int)new_capacity);
         if ((mStorage) &&
             (mCount==where) &&
             (mFlags & HAS_TRIVIAL_COPY) &&
@@ -464,7 +463,7 @@
             this, (int)where, (int)amount, (int)mCount); // caller already checked
 
     size_t new_size;
-    LOG_ALWAYS_FATAL_IF(!safe_sub(&new_size, mCount, amount));
+    LOG_ALWAYS_FATAL_IF(__builtin_sub_overflow(mCount, amount, &new_size));
 
     if (new_size < (capacity() / 2)) {
         // NOTE: (new_size * 2) is safe because capacity didn't overflow and
diff --git a/libziparchive/Android.bp b/libziparchive/Android.bp
index 2606aa9..fd3f602 100644
--- a/libziparchive/Android.bp
+++ b/libziparchive/Android.bp
@@ -158,4 +158,5 @@
         "libbase",
         "libziparchive",
     ],
+    recovery_available: true,
 }
diff --git a/libziparchive/zip_archive.cc b/libziparchive/zip_archive.cc
index 9536fc7..add6e14 100644
--- a/libziparchive/zip_archive.cc
+++ b/libziparchive/zip_archive.cc
@@ -41,6 +41,7 @@
 #include <android-base/logging.h>
 #include <android-base/macros.h>  // TEMP_FAILURE_RETRY may or may not be in unistd
 #include <android-base/memory.h>
+#include <android-base/utf8.h>
 #include <log/log.h>
 #include <utils/Compat.h>
 #include <utils/FileMap.h>
@@ -471,7 +472,7 @@
 }
 
 int32_t OpenArchive(const char* fileName, ZipArchiveHandle* handle) {
-  const int fd = open(fileName, O_RDONLY | O_BINARY, 0);
+  const int fd = ::android::base::utf8::open(fileName, O_RDONLY | O_BINARY, 0);
   ZipArchive* archive = new ZipArchive(fd, true);
   *handle = archive;
 
diff --git a/llkd/Android.bp b/llkd/Android.bp
index a6edd26..62a637d 100644
--- a/llkd/Android.bp
+++ b/llkd/Android.bp
@@ -20,6 +20,12 @@
     export_include_dirs: ["include"],
 
     cflags: ["-Werror"],
+
+    product_variables: {
+        debuggable: {
+            cppflags: ["-D__PTRACE_ENABLED__"],
+        },
+    },
 }
 
 cc_binary {
@@ -39,4 +45,9 @@
     cflags: ["-Werror"],
 
     init_rc: ["llkd.rc"],
+    product_variables: {
+        debuggable: {
+            init_rc: ["llkd-debuggable.rc"],
+	},
+    },
 }
diff --git a/llkd/README.md b/llkd/README.md
index 2314583..1f69718 100644
--- a/llkd/README.md
+++ b/llkd/README.md
@@ -23,6 +23,9 @@
 Operations
 ----------
 
+There are two detection scenarios. Persistent D or Z state, and persistent
+stack signature.
+
 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
@@ -32,6 +35,26 @@
 double the expected time to flow through the mainloop.  Sampling is every
 ro.llk_sample_ms.
 
+For usedebug releases only, persistent stack signature checking is enabled.
+If a thread in any state but Z, has a persistent listed ro.llk.stack kernel
+symbol always being reported, even if there is forward scheduling progress, for
+longer than ro.llk.timeout_ms, or ro.llk.stack.timeout_ms, then issue a kill
+to the process.  If another scan shows the same process continues to exist,
+then have a confirmed live-lock condition and need to panic.  There is no
+ABA detection since forward scheduling progress is allowed, thus the condition
+for the symbols are:
+
+- Check is looking for " " + __symbol__+ "0x" in /proc/<pid>/stack.
+- The __symbol__ should be rare and short lived enough that on a typical
+  system the function is seen at most only once in a sample over the timeout
+  period of ro.llk.stack.timeout_ms, samples occur every ro.llk.check_ms. This
+  can be the only way to prevent a false trigger as there is no ABA protection.
+- Persistent continuously when the live lock condition exists.
+- Should be just below the function that is calling the lock that could
+  contend, because if the lock is below or in the symbol function, the
+  symbol will show in all affected processes, not just the one that
+  caused the lockup.
+
 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
@@ -40,7 +63,9 @@
 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.
+conditions are met to cover kernel components.  For the stack symbol checking,
+there is an additional process blacklist so that we do not incide sepolicy
+violations on services that block ptrace operations.
 
 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
@@ -93,14 +118,31 @@
 #### ro.llk.Z.timeout_ms
 default ro.llk.timeout_ms, Z maximum timelimit.
 
+#### ro.llk.stack.timeout_ms
+default ro.llk.timeout_ms,
+checking for persistent stack symbols maximum timelimit.
+Only active on userdebug and eng builds.
+
 #### ro.llk.check_ms
 default 2 minutes samples of threads for D or Z.
 
+#### ro.llk.stack
+default *empty* or false, comma separated list of kernel symbols.
+The string "*false*" is the equivalent to an *empty* list.
+Look for kernel stack symbols that if ever persistently present can
+indicate a subsystem is locked up.
+Beware, check does not on purpose do forward scheduling ABA except by polling
+every ro.llk_check_ms over the period ro.llk.stack.timeout_ms, so stack symbol
+should be exceptionally rare and fleeting.
+One must be convinced that it is virtually *impossible* for symbol to show up
+persistently in all samples of the stack.
+Only active on userdebug and eng builds.
+
 #### 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*].
-The string false is the equivalent to an empty list.
+The string "*false*" is the equivalent to an *empty* list.
 Do not watch these processes.  A process can be comm, cmdline or pid reference.
 NB: automated default here can be larger than the current maximum property
 size of 92.
@@ -108,15 +150,23 @@
 
 #### ro.llk.blacklist.parent
 default 0,2 (kernel and [kthreadd]).
-The string false is the equivalent to an empty list.
+The string "*false*" is the equivalent to an *empty* list.
 Do not watch processes that have this parent.
 A parent process can be comm, cmdline or pid reference.
 
 #### ro.llk.blacklist.uid
 default *empty* or false, comma separated list of uid numbers or names.
-The string false is the equivalent to an empty list.
+The string "*false*" is the equivalent to an *empty* list.
 Do not watch processes that match this uid.
 
+#### ro.llk.blacklist.process.stack
+default process names init,lmkd,lmkd.llkd,llkd,keystore,logd.
+The string "*false*" is the equivalent to an *empty* list.
+This subset of processes are not monitored for live lock stack signatures.
+Also prevents the sepolicy violation associated with processes that block
+ptrace, as these can not be checked anyways.
+Only active on userdebug and eng builds.
+
 Architectural Concerns
 ----------------------
 
diff --git a/llkd/include/llkd.h b/llkd/include/llkd.h
index e3ae4bb..d0188ec 100644
--- a/llkd/include/llkd.h
+++ b/llkd/include/llkd.h
@@ -43,9 +43,12 @@
 #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_STACK_TIMEOUT_MS_PROPERTY  "ro.llk.stack.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_CHECK_STACK_PROPERTY       "ro.llk.stack"
+#define LLK_CHECK_STACK_DEFAULT        ""
 #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]"
@@ -53,6 +56,8 @@
 #define LLK_BLACKLIST_PARENT_DEFAULT   "0,2,[kthreadd]"
 #define LLK_BLACKLIST_UID_PROPERTY     "ro.llk.blacklist.uid"
 #define LLK_BLACKLIST_UID_DEFAULT      ""
+#define LLK_BLACKLIST_STACK_PROPERTY   "ro.llk.blacklist.process.stack"
+#define LLK_BLACKLIST_STACK_DEFAULT    "init,lmkd.llkd,llkd,keystore,/system/bin/keystore"
 /* clang-format on */
 
 __END_DECLS
diff --git a/llkd/libllkd.cpp b/llkd/libllkd.cpp
index 48551f2..58c2ba8 100644
--- a/llkd/libllkd.cpp
+++ b/llkd/libllkd.cpp
@@ -73,7 +73,14 @@
 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
+enum {                                               // enum of state indexes
+    llkStateD,                                       // Persistent 'D' state
+    llkStateZ,                                       // Persistent 'Z' state
+#ifdef __PTRACE_ENABLED__                            // Extra privileged states
+    llkStateStack,                                   // stack signature
+#endif                                               // End of extra privilege
+    llkNumStates,                                    // Maxumum number of states
+};                                                   // state indexes
 milliseconds llkStateTimeoutMs[llkNumStates];        // timeout override for each detection state
 milliseconds llkCheckMs;                             // checking interval to inspect any
                                                      // persistent live-locked states
@@ -83,6 +90,10 @@
 // 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);
+#ifdef __PTRACE_ENABLED__
+// list of stack symbols to search for persistence.
+std::unordered_set<std::string> llkCheckStackSymbols;
+#endif
 
 // Blacklist variables, initialized with comma separated lists of high false
 // positive and/or dangerous references, e.g. without self restart, for pid,
@@ -97,6 +108,11 @@
 std::unordered_set<std::string> llkBlacklistParent;
 // list of uids, and uid names, to skip, default nothing
 std::unordered_set<std::string> llkBlacklistUid;
+#ifdef __PTRACE_ENABLED__
+// list of names to skip stack checking. "init", "lmkd", "llkd", "keystore" or
+// "logd" (if not userdebug).
+std::unordered_set<std::string> llkBlacklistStack;
+#endif
 
 class dir {
   public:
@@ -263,6 +279,9 @@
                                    // forward scheduling progress.
     milliseconds update;           // llkUpdate millisecond signature of last.
     milliseconds count;            // duration in state.
+#ifdef __PTRACE_ENABLED__          // Privileged state checking
+    milliseconds count_stack;      // duration where stack is stagnant.
+#endif                             // End privilege
     pid_t pid;                     // /proc/<pid> before iterating through
                                    // /proc/<pid>/task/<tid> for threads.
     pid_t ppid;                    // /proc/<tid>/stat field 4 parent pid.
@@ -272,6 +291,9 @@
     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 ?)
+#ifdef __PTRACE_ENABLED__          // Privileged state checking
+    char stack;                    // index in llkCheckStackSymbols for matches
+#endif                             // and with maximum index PROP_VALUE_MAX/2.
     char comm[TASK_COMM_LEN + 3];  // space for adding '[' and ']'
     bool exeMissingValid;          // exeMissing has been cached
     bool cmdlineValid;             // cmdline has been cached
@@ -286,11 +308,17 @@
           nrSwitches(0),
           update(llkUpdate),
           count(0ms),
+#ifdef __PTRACE_ENABLED__
+          count_stack(0ms),
+#endif
           pid(pid),
           ppid(ppid),
           uid(-1),
           time(time),
           state(state),
+#ifdef __PTRACE_ENABLED__
+          stack(-1),
+#endif
           exeMissingValid(false),
           cmdlineValid(false),
           updated(true),
@@ -343,6 +371,10 @@
     void reset(void) {  // reset cache, if we detected pid rollover
         uid = -1;
         state = '?';
+#ifdef __PTRACE_ENABLED__
+        count_stack = 0ms;
+        stack = -1;
+#endif
         cmdline = "";
         comm[0] = '\0';
         exeMissingValid = false;
@@ -667,6 +699,48 @@
     return ret;
 }
 
+#ifdef __PTRACE_ENABLED__
+bool llkCheckStack(proc* procp, const std::string& piddir) {
+    if (llkCheckStackSymbols.empty()) return false;
+    if (procp->state == 'Z') {  // No brains for Zombies
+        procp->stack = -1;
+        procp->count_stack = 0ms;
+        return false;
+    }
+
+    // Don't check process that are known to block ptrace, save sepolicy noise.
+    if (llkSkipName(std::to_string(procp->pid), llkBlacklistStack)) return false;
+    if (llkSkipName(procp->getComm(), llkBlacklistStack)) return false;
+    if (llkSkipName(procp->getCmdline(), llkBlacklistStack)) return false;
+
+    auto kernel_stack = ReadFile(piddir + "/stack");
+    if (kernel_stack.empty()) {
+        LOG(INFO) << piddir << "/stack empty comm=" << procp->getComm()
+                  << " cmdline=" << procp->getCmdline();
+        return false;
+    }
+    // A scheduling incident that should not reset count_stack
+    if (kernel_stack.find(" cpu_worker_pools+0x") != std::string::npos) return false;
+    char idx = -1;
+    char match = -1;
+    for (const auto& stack : llkCheckStackSymbols) {
+        if (++idx < 0) break;
+        if (kernel_stack.find(" "s + stack + "+0x") != std::string::npos) {
+            match = idx;
+            break;
+        }
+    }
+    if (procp->stack != match) {
+        procp->stack = match;
+        procp->count_stack = 0ms;
+        return false;
+    }
+    if (match == char(-1)) return false;
+    procp->count_stack += llkCycle;
+    return procp->count_stack >= llkStateTimeoutMs[llkStateStack];
+}
+#endif
+
 // 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
@@ -731,13 +805,23 @@
               << 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"
+#ifdef __PTRACE_ENABLED__
+              << LLK_STACK_TIMEOUT_MS_PROPERTY "=" << llkFormat(llkStateTimeoutMs[llkStateStack])
+              << "\n"
+#endif
               << LLK_CHECK_MS_PROPERTY "=" << llkFormat(llkCheckMs) << "\n"
+#ifdef __PTRACE_ENABLED__
+              << LLK_CHECK_STACK_PROPERTY "=" << llkFormat(llkCheckStackSymbols) << "\n"
+              << LLK_BLACKLIST_STACK_PROPERTY "=" << llkFormat(llkBlacklistStack) << "\n"
+#endif
               << LLK_BLACKLIST_PROCESS_PROPERTY "=" << llkFormat(llkBlacklistProcess) << "\n"
               << LLK_BLACKLIST_PARENT_PROPERTY "=" << llkFormat(llkBlacklistParent) << "\n"
               << LLK_BLACKLIST_UID_PROPERTY "=" << llkFormat(llkBlacklistUid);
 }
 
 void* llkThread(void* obj) {
+    prctl(PR_SET_DUMPABLE, 0);
+
     LOG(INFO) << "started";
 
     std::string name = std::to_string(::gettid());
@@ -890,9 +974,14 @@
             if (pid == myPid) {
                 break;
             }
-            if (!llkIsMonitorState(state)) {
+#ifdef __PTRACE_ENABLED__
+            // if no stack monitoring, we can quickly exit here
+            if (!llkIsMonitorState(state) && llkCheckStackSymbols.empty()) {
                 continue;
             }
+#else
+            if (!llkIsMonitorState(state)) continue;
+#endif
             if ((tid == myTid) || llkSkipPid(tid)) {
                 continue;
             }
@@ -923,12 +1012,26 @@
             // 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();
+#ifdef __PTRACE_ENABLED__
+            auto stuck = llkCheckStack(procp, piddir);
+            if (llkIsMonitorState(state)) {
+                if (procp->count >= llkStateTimeoutMs[(state == 'Z') ? llkStateZ : llkStateD]) {
+                    stuck = true;
+                } else if (procp->count != 0ms) {
+                    LOG(VERBOSE) << state << ' ' << llkFormat(procp->count) << ' ' << ppid << "->"
+                                 << pid << "->" << tid << ' ' << procp->getComm();
+                }
+            }
+            if (!stuck) continue;
+#else
+            if (procp->count >= llkStateTimeoutMs[(state == 'Z') ? llkStateZ : llkStateD]) {
+                if (procp->count != 0ms) {
+                    LOG(VERBOSE) << state << ' ' << llkFormat(procp->count) << ' ' << ppid << "->"
+                                 << pid << "->" << tid << ' ' << procp->getComm();
+                }
                 continue;
             }
+#endif
 
             // We have to kill it to determine difference between live lock
             // and persistent state blocked on a resource.  Is there something
@@ -967,12 +1070,13 @@
                         // 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]";
+                    default:
+                        LOG(WARNING) << state << ' ' << llkFormat(procp->count) << ' ' << pid
+                                     << "->" << tid << ' ' << procp->getComm() << " [kill]";
                         if ((llkKillOneProcess(llkTidLookup(pid), procp) >= 0) ||
-                            (llkKillOneProcess(pid, 'D', tid) >= 0) ||
+                            (llkKillOneProcess(pid, state, tid) >= 0) ||
                             (llkKillOneProcess(procp, procp) >= 0) ||
-                            (llkKillOneProcess(tid, 'D', tid) >= 0)) {
+                            (llkKillOneProcess(tid, state, tid) >= 0)) {
                             continue;
                         }
                         break;
@@ -981,7 +1085,8 @@
             // 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");
+            llkPanicKernel(true, tid,
+                           (state == 'Z') ? "zombie" : (state == 'D') ? "driver" : "sleeping");
         }
         LOG(VERBOSE) << "+closedir()";
     }
@@ -1039,8 +1144,9 @@
 }
 
 bool llkInit(const char* threadname) {
+    auto debuggable = android::base::GetBoolProperty("ro.debuggable", false);
     llkLowRam = android::base::GetBoolProperty("ro.config.low_ram", false);
-    if (!LLK_ENABLE_DEFAULT && android::base::GetBoolProperty("ro.debuggable", false)) {
+    if (!LLK_ENABLE_DEFAULT && debuggable) {
         llkEnable = android::base::GetProperty(LLK_ENABLE_PROPERTY, "eng") == "eng";
         khtEnable = android::base::GetProperty(KHT_ENABLE_PROPERTY, "eng") == "eng";
     }
@@ -1067,8 +1173,21 @@
     llkValidate();  // validate llkTimeoutMs, llkCheckMs and llkCycle
     llkStateTimeoutMs[llkStateD] = GetUintProperty(LLK_D_TIMEOUT_MS_PROPERTY, llkTimeoutMs);
     llkStateTimeoutMs[llkStateZ] = GetUintProperty(LLK_Z_TIMEOUT_MS_PROPERTY, llkTimeoutMs);
+#ifdef __PTRACE_ENABLED__
+    llkStateTimeoutMs[llkStateStack] = GetUintProperty(LLK_STACK_TIMEOUT_MS_PROPERTY, llkTimeoutMs);
+#endif
     llkCheckMs = GetUintProperty(LLK_CHECK_MS_PROPERTY, llkCheckMs);
     llkValidate();  // validate all (effectively minus llkTimeoutMs)
+#ifdef __PTRACE_ENABLED__
+    if (debuggable) {
+        llkCheckStackSymbols = llkSplit(
+                android::base::GetProperty(LLK_CHECK_STACK_PROPERTY, LLK_CHECK_STACK_DEFAULT));
+    }
+    std::string defaultBlacklistStack(LLK_BLACKLIST_STACK_DEFAULT);
+    if (!debuggable) defaultBlacklistStack += ",logd,/system/bin/logd";
+    llkBlacklistStack = llkSplit(
+            android::base::GetProperty(LLK_BLACKLIST_STACK_PROPERTY, defaultBlacklistStack));
+#endif
     std::string defaultBlacklistProcess(
         std::to_string(kernelPid) + "," + std::to_string(initPid) + "," +
         std::to_string(kthreaddPid) + "," + std::to_string(::getpid()) + "," +
diff --git a/llkd/llkd-debuggable.rc b/llkd/llkd-debuggable.rc
new file mode 100644
index 0000000..724cb5e
--- /dev/null
+++ b/llkd/llkd-debuggable.rc
@@ -0,0 +1,19 @@
+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}
+
+service llkd-1 /system/bin/llkd
+    class late_start
+    disabled
+    user llkd
+    group llkd readproc
+    capabilities KILL IPC_LOCK SYS_PTRACE DAC_OVERRIDE
+    file /dev/kmsg w
+    file /proc/sysrq-trigger w
+    writepid /dev/cpuset/system-background/tasks
diff --git a/llkd/llkd.cpp b/llkd/llkd.cpp
index f10253d..1920198 100644
--- a/llkd/llkd.cpp
+++ b/llkd/llkd.cpp
@@ -17,6 +17,7 @@
 #include "llkd.h"
 
 #include <sched.h>
+#include <sys/prctl.h>
 #include <unistd.h>
 
 #include <chrono>
@@ -26,6 +27,8 @@
 using namespace std::chrono;
 
 int main(int, char**) {
+    prctl(PR_SET_DUMPABLE, 0);
+
     LOG(INFO) << "started";
 
     bool enabled = llkInit();
diff --git a/llkd/llkd.rc b/llkd/llkd.rc
index e538cdb..b1f96a8 100644
--- a/llkd/llkd.rc
+++ b/llkd/llkd.rc
@@ -3,15 +3,8 @@
     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:ro.llk.enable=true
+    setprop llk.enable true
 
 on property:llk.enable=1
     setprop llk.enable true
@@ -19,6 +12,9 @@
 on property:llk.enable=0
     setprop llk.enable false
 
+on property:ro.khungtask.enable=true
+    setprop khungtask.enable true
+
 on property:khungtask.enable=1
     setprop khungtask.enable true
 
@@ -36,9 +32,9 @@
     write /proc/sys/kernel/hung_task_panic 0
 
 on property:llk.enable=true
-    start llkd
+    start llkd-${ro.debuggable:-0}
 
-service llkd /system/bin/llkd
+service llkd-0 /system/bin/llkd
     class late_start
     disabled
     user llkd
diff --git a/llkd/tests/llkd_test.cpp b/llkd/tests/llkd_test.cpp
index 3a15ff1..f54932b 100644
--- a/llkd/tests/llkd_test.cpp
+++ b/llkd/tests/llkd_test.cpp
@@ -14,8 +14,10 @@
  * limitations under the License.
  */
 
+#include <fcntl.h>
 #include <signal.h>
 #include <stdint.h>
+#include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <unistd.h>
@@ -81,9 +83,12 @@
         (GetUintProperty(LLK_CHECK_MS_PROPERTY,
                          LLK_TIMEOUT_MS_DEFAULT / LLK_CHECKS_PER_TIMEOUT_DEFAULT) !=
          duration_cast<milliseconds>(10s))) {
-        execute("stop llkd");
+        execute("stop llkd-0");
+        execute("stop llkd-1");
         rest();
         std::string setprop("setprop ");
+        execute((setprop + LLK_CHECK_STACK_PROPERTY + " SyS_openat").c_str());
+        rest();
         execute((setprop + LLK_ENABLE_WRITEABLE_PROPERTY + " false").c_str());
         rest();
         execute((setprop + LLK_TIMEOUT_MS_PROPERTY + " 120000").c_str());
@@ -92,8 +97,10 @@
         rest();
         execute((setprop + LLK_CHECK_MS_PROPERTY + " 10000").c_str());
         rest();
-        execute((setprop + LLK_ENABLE_PROPERTY + " true").c_str());
-        rest();
+        if (!default_enable) {
+            execute((setprop + LLK_ENABLE_PROPERTY + " true").c_str());
+            rest();
+        }
         execute((setprop + LLK_ENABLE_WRITEABLE_PROPERTY + " true").c_str());
         rest();
     }
@@ -104,7 +111,7 @@
     }
     default_enable = android::base::GetBoolProperty(LLK_ENABLE_PROPERTY, default_enable);
     if (default_enable) {
-        execute("start llkd");
+        execute("start llkd-1");
         rest();
         GTEST_LOG_INFO << "llkd enabled\n";
     } else {
@@ -123,8 +130,10 @@
         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);
+    auto timeout = GetUintProperty((state == 'Z') ? LLK_Z_TIMEOUT_MS_PROPERTY
+                                                  : (state == 'S') ? LLK_STACK_TIMEOUT_MS_PROPERTY
+                                                                   : LLK_D_TIMEOUT_MS_PROPERTY,
+                                   llkTimeoutMs);
     if (timeout < LLK_TIMEOUT_MS_MINIMUM) {
         timeout = LLK_TIMEOUT_MS_MINIMUM;
     }
@@ -285,3 +294,41 @@
 
     waitForPid(child_pid);
 }
+
+TEST(llkd, sleep) {
+    if (checkKill("kernel_panic,sysrq,livelock,sleeping")) {
+        return;
+    }
+    if (!android::base::GetBoolProperty("ro.debuggable", false)) {
+        GTEST_LOG_WARNING << "Features not available on user builds\n";
+    }
+
+    const auto period = llkdSleepPeriod('S');
+
+    /* Create a Persistent SyS_openat for single-ended pipe */
+    static constexpr char stack_pipe_file[] = "/dev/stack_pipe_file";
+    unlink(stack_pipe_file);
+    auto pipe_ret = mknod(stack_pipe_file, S_IFIFO | 0666, 0);
+    ASSERT_LE(0, pipe_ret);
+
+    auto child_pid = fork();
+    ASSERT_LE(0, child_pid);
+    if (!child_pid) {
+        child_pid = fork();
+        ASSERT_LE(0, child_pid);
+        if (!child_pid) {
+            sleep(period.count());
+            auto fd = open(stack_pipe_file, O_RDONLY | O_CLOEXEC);
+            close(fd);
+            exit(0);
+        } else {
+            auto fd = open(stack_pipe_file, O_WRONLY | O_CLOEXEC);
+            close(fd);
+            exit(42);
+        }
+    }
+
+    waitForPid(child_pid);
+
+    unlink(stack_pipe_file);
+}
diff --git a/platform_tools_tool_version.mk b/platform_tools_tool_version.mk
deleted file mode 100644
index eed2ab5..0000000
--- a/platform_tools_tool_version.mk
+++ /dev/null
@@ -1,22 +0,0 @@
-# Copyright (C) 2017 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.
-
-# We rewrite ${PLATFORM_SDK_VERSION} with 0 rather than $(PLATFORM_SDK_VERSION)
-# because on the actual platform tools release branches the file contains a
-# literal instead. Using 0 lets us easily distinguish non-canonical builds.
-platform_tools_version := $(shell sed \
-    's/$${PLATFORM_SDK_VERSION}/0/ ; s/^Pkg.Revision=\(.*\)/\1/p ; d' \
-    development/sdk/plat_tools_source.prop_template \
-  )
-tool_version := $(platform_tools_version)-$(BUILD_NUMBER_FROM_FILE)
diff --git a/rootdir/init.rc b/rootdir/init.rc
index db89ea8..1c2ef64 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -716,12 +716,12 @@
     class_start main
 
 on property:vold.decrypt=trigger_restart_framework
-    stop surfaceflinger
-    start surfaceflinger
     # A/B update verifier that marks a successful boot.
     exec_start update_verifier
     class_start main
     class_start late_start
+    setprop service.bootanim.exit 0
+    start bootanim
 
 on property:vold.decrypt=trigger_shutdown_framework
     class_reset late_start
diff --git a/shell_and_utilities/Android.bp b/shell_and_utilities/Android.bp
index 3d7521c..2d4a26f 100644
--- a/shell_and_utilities/Android.bp
+++ b/shell_and_utilities/Android.bp
@@ -21,6 +21,7 @@
         "tcpdump",
         "toolbox",
         "toybox",
+        "unzip",
     ],
 }
 
@@ -31,6 +32,7 @@
         "sh.recovery",
         "toolbox.recovery",
         "toybox.recovery",
+        "unzip.recovery",
     ],
 }
 
diff --git a/trusty/keymaster/legacy/trusty_keymaster_device.cpp b/trusty/keymaster/legacy/trusty_keymaster_device.cpp
index ea00a92..afdf43b 100644
--- a/trusty/keymaster/legacy/trusty_keymaster_device.cpp
+++ b/trusty/keymaster/legacy/trusty_keymaster_device.cpp
@@ -122,10 +122,10 @@
 void AddClientAndAppData(const keymaster_blob_t* client_id, const keymaster_blob_t* app_data,
                          RequestType* request) {
     request->additional_params.Clear();
-    if (client_id) {
+    if (client_id && client_id->data_length > 0) {
         request->additional_params.push_back(TAG_APPLICATION_ID, *client_id);
     }
-    if (app_data) {
+    if (app_data && app_data->data_length > 0) {
         request->additional_params.push_back(TAG_APPLICATION_DATA, *app_data);
     }
 }