diff --git a/cmds/atrace/atrace.cpp b/cmds/atrace/atrace.cpp
index 4c0e242..8faf276 100644
--- a/cmds/atrace/atrace.cpp
+++ b/cmds/atrace/atrace.cpp
@@ -117,6 +117,17 @@
         { REQ,      "/sys/kernel/debug/tracing/events/irq/enable" },
         { OPT,      "/sys/kernel/debug/tracing/events/ipi/enable" },
     } },
+    { "i2c",        "I2C Events",   0, {
+        { REQ,      "/sys/kernel/debug/tracing/events/i2c/enable" },
+        { REQ,      "/sys/kernel/debug/tracing/events/i2c/i2c_read/enable" },
+        { REQ,      "/sys/kernel/debug/tracing/events/i2c/i2c_write/enable" },
+        { REQ,      "/sys/kernel/debug/tracing/events/i2c/i2c_result/enable" },
+        { REQ,      "/sys/kernel/debug/tracing/events/i2c/i2c_reply/enable" },
+        { OPT,      "/sys/kernel/debug/tracing/events/i2c/smbus_read/enable" },
+        { OPT,      "/sys/kernel/debug/tracing/events/i2c/smbus_write/enable" },
+        { OPT,      "/sys/kernel/debug/tracing/events/i2c/smbus_result/enable" },
+        { OPT,      "/sys/kernel/debug/tracing/events/i2c/smbus_reply/enable" },
+    } },
     { "freq",       "CPU Frequency",    0, {
         { REQ,      "/sys/kernel/debug/tracing/events/power/cpu_frequency/enable" },
         { OPT,      "/sys/kernel/debug/tracing/events/power/clock_set_rate/enable" },
@@ -366,7 +377,7 @@
 // Check whether the category would be supported on the device if the user
 // were root.  This function assumes that root is able to write to any file
 // that exists.  It performs the same logic as isCategorySupported, but it
-// uses file existance rather than writability in the /sys/ file checks.
+// uses file existence rather than writability in the /sys/ file checks.
 static bool isCategorySupportedForRoot(const TracingCategory& category)
 {
     bool ok = category.tags != 0;
@@ -976,7 +987,7 @@
                     "  -s N            sleep for N seconds before tracing [default 0]\n"
                     "  -t N            trace for N seconds [default 5]\n"
                     "  -z              compress the trace dump\n"
-                    "  --async_start   start circular trace and return immediatly\n"
+                    "  --async_start   start circular trace and return immediately\n"
                     "  --async_dump    dump the current contents of circular trace buffer\n"
                     "  --async_stop    stop tracing and dump the current contents of circular\n"
                     "                    trace buffer\n"
@@ -1151,7 +1162,7 @@
             fflush(stdout);
             int outFd = STDOUT_FILENO;
             if (g_outputFile) {
-                outFd = open(g_outputFile, O_WRONLY | O_CREAT);
+                outFd = open(g_outputFile, O_WRONLY | O_CREAT, 0644);
             }
             if (outFd == -1) {
                 printf("Failed to open '%s', err=%d", g_outputFile, errno);
diff --git a/cmds/atrace/atrace.rc b/cmds/atrace/atrace.rc
index e3cc9da..d486a3d 100644
--- a/cmds/atrace/atrace.rc
+++ b/cmds/atrace/atrace.rc
@@ -54,6 +54,15 @@
     chmod 0664 /sys/kernel/debug/tracing/events/binder/binder_lock/enable
     chmod 0664 /sys/kernel/debug/tracing/events/binder/binder_locked/enable
     chmod 0664 /sys/kernel/debug/tracing/events/binder/binder_unlock/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/i2c_read/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/i2c_write/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/i2c_result/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/i2c_reply/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/smbus_read/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/smbus_write/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/smbus_result/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/smbus_reply/enable
 
     # Tracing disabled by default
     write /sys/kernel/debug/tracing/tracing_on 0
diff --git a/cmds/cmd/Android.mk b/cmds/cmd/Android.mk
index ac2f4c0..d565e57 100644
--- a/cmds/cmd/Android.mk
+++ b/cmds/cmd/Android.mk
@@ -7,8 +7,11 @@
 LOCAL_SHARED_LIBRARIES := \
 	libutils \
 	liblog \
+    libselinux \
 	libbinder
-	
+
+LOCAL_C_INCLUDES += \
+    $(JNI_H_INCLUDE)
 
 ifeq ($(TARGET_OS),linux)
 	LOCAL_CFLAGS += -DXP_UNIX
diff --git a/cmds/cmd/cmd.cpp b/cmds/cmd/cmd.cpp
index ed740d3..73d274f 100644
--- a/cmds/cmd/cmd.cpp
+++ b/cmds/cmd/cmd.cpp
@@ -21,7 +21,10 @@
 #include <binder/ProcessState.h>
 #include <binder/IResultReceiver.h>
 #include <binder/IServiceManager.h>
+#include <binder/IShellCallback.h>
 #include <binder/TextOutput.h>
+#include <utils/Condition.h>
+#include <utils/Mutex.h>
 #include <utils/Vector.h>
 
 #include <getopt.h>
@@ -29,7 +32,16 @@
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
+#include <fcntl.h>
 #include <sys/time.h>
+#include <errno.h>
+
+#include "selinux/selinux.h"
+#include "selinux/android.h"
+
+#include <UniquePtr.h>
+
+#define DEBUG 0
 
 using namespace android;
 
@@ -38,10 +50,72 @@
     return lhs->compare(*rhs);
 }
 
+struct SecurityContext_Delete {
+    void operator()(security_context_t p) const {
+        freecon(p);
+    }
+};
+typedef UniquePtr<char[], SecurityContext_Delete> Unique_SecurityContext;
+
+class MyShellCallback : public BnShellCallback
+{
+public:
+    bool mActive = true;
+
+    virtual int openOutputFile(const String16& path, const String16& seLinuxContext) {
+        String8 path8(path);
+        char cwd[256];
+        getcwd(cwd, 256);
+        String8 fullPath(cwd);
+        fullPath.appendPath(path8);
+        if (!mActive) {
+            aerr << "Open attempt after active for: " << fullPath << endl;
+            return -EPERM;
+        }
+        int fd = open(fullPath.string(), O_WRONLY|O_CREAT|O_TRUNC, S_IRWXU|S_IRWXG);
+        if (fd < 0) {
+            return fd;
+        }
+        if (is_selinux_enabled() && seLinuxContext.size() > 0) {
+            String8 seLinuxContext8(seLinuxContext);
+            security_context_t tmp = NULL;
+            int ret = getfilecon(fullPath.string(), &tmp);
+            Unique_SecurityContext context(tmp);
+            int accessGranted = selinux_check_access(seLinuxContext8.string(), context.get(),
+                    "file", "write", NULL);
+            if (accessGranted != 0) {
+                close(fd);
+                aerr << "System server has no access to file context " << context.get()
+                        << " (from path " << fullPath.string() << ", context "
+                        << seLinuxContext8.string() << ")" << endl;
+                return -EPERM;
+            }
+        }
+        return fd;
+    }
+};
+
 class MyResultReceiver : public BnResultReceiver
 {
 public:
-    virtual void send(int32_t /*resultCode*/) {
+    Mutex mMutex;
+    Condition mCondition;
+    bool mHaveResult = false;
+    int32_t mResult = 0;
+
+    virtual void send(int32_t resultCode) {
+        AutoMutex _l(mMutex);
+        mResult = resultCode;
+        mHaveResult = true;
+        mCondition.signal();
+    }
+
+    int32_t waitForResult() {
+        AutoMutex _l(mMutex);
+        while (!mHaveResult) {
+            mCondition.wait(mMutex);
+        }
+        return mResult;
     }
 };
 
@@ -54,13 +128,13 @@
     sp<IServiceManager> sm = defaultServiceManager();
     fflush(stdout);
     if (sm == NULL) {
-        ALOGE("Unable to get default service manager!");
+        ALOGW("Unable to get default service manager!");
         aerr << "cmd: Unable to get default service manager!" << endl;
         return 20;
     }
 
     if (argc == 1) {
-        aout << "cmd: no service specified; use -l to list all services" << endl;
+        aerr << "cmd: No service specified; use -l to list all services" << endl;
         return 20;
     }
 
@@ -85,12 +159,41 @@
     String16 cmd = String16(argv[1]);
     sp<IBinder> service = sm->checkService(cmd);
     if (service == NULL) {
-        aerr << "Can't find service: " << argv[1] << endl;
+        ALOGW("Can't find service %s", argv[1]);
+        aerr << "cmd: Can't find service: " << argv[1] << endl;
         return 20;
     }
 
+    sp<MyShellCallback> cb = new MyShellCallback();
+    sp<MyResultReceiver> result = new MyResultReceiver();
+
+#if DEBUG
+    ALOGD("cmd: Invoking %s in=%d, out=%d, err=%d", argv[1], STDIN_FILENO, STDOUT_FILENO,
+            STDERR_FILENO);
+#endif
+
     // TODO: block until a result is returned to MyResultReceiver.
-    IBinder::shellCommand(service, STDIN_FILENO, STDOUT_FILENO, STDERR_FILENO, args,
-            new MyResultReceiver());
-    return 0;
+    status_t err = IBinder::shellCommand(service, STDIN_FILENO, STDOUT_FILENO, STDERR_FILENO, args,
+            cb, result);
+    if (err < 0) {
+        const char* errstr;
+        switch (err) {
+            case BAD_TYPE: errstr = "Bad type"; break;
+            case FAILED_TRANSACTION: errstr = "Failed transaction"; break;
+            case FDS_NOT_ALLOWED: errstr = "File descriptors not allowed"; break;
+            case UNEXPECTED_NULL: errstr = "Unexpected null"; break;
+            default: errstr = strerror(-err); break;
+        }
+        ALOGW("Failure calling service %s: %s (%d)", argv[1], errstr, -err);
+        aout << "cmd: Failure calling service " << argv[1] << ": " << errstr << " ("
+                << (-err) << ")" << endl;
+        return err;
+    }
+
+    cb->mActive = false;
+    status_t res = result->waitForResult();
+#if DEBUG
+    ALOGD("result=%d", (int)res);
+#endif
+    return res;
 }
diff --git a/cmds/dumpstate/.clang-format b/cmds/dumpstate/.clang-format
new file mode 100644
index 0000000..fc4eb1b
--- /dev/null
+++ b/cmds/dumpstate/.clang-format
@@ -0,0 +1,13 @@
+BasedOnStyle: Google
+AllowShortBlocksOnASingleLine: false
+AllowShortFunctionsOnASingleLine: false
+
+AccessModifierOffset: -2
+ColumnLimit: 100
+CommentPragmas: NOLINT:.*
+DerivePointerAlignment: false
+IndentWidth: 4
+PointerAlignment: Left
+TabWidth: 4
+UseTab: Never
+PenaltyExcessCharacter: 32
diff --git a/cmds/dumpstate/Android.mk b/cmds/dumpstate/Android.mk
index e478651..695e464 100644
--- a/cmds/dumpstate/Android.mk
+++ b/cmds/dumpstate/Android.mk
@@ -1,20 +1,100 @@
 LOCAL_PATH:= $(call my-dir)
 
+# ================#
+# Common settings #
+# ================#
+# ZipArchive support, the order matters here to get all symbols.
+COMMON_ZIP_LIBRARIES := libziparchive libz libcrypto_static
+
+# TODO: ideally the tests should depend on a shared dumpstate library, but currently libdumpstate
+# is used to define the device-specific HAL library. Instead, both dumpstate and dumpstate_test
+# shares a lot of common settings
+COMMON_LOCAL_CFLAGS := \
+       -Wall -Werror -Wno-missing-field-initializers -Wno-unused-variable -Wunused-parameter
+COMMON_SRC_FILES := \
+        utils.cpp
+COMMON_SHARED_LIBRARIES := \
+        libbase \
+        libcutils \
+        libhardware_legacy \
+        liblog \
+        libselinux
+
+# ==========#
+# dumpstate #
+# ==========#
 include $(CLEAR_VARS)
 
 ifdef BOARD_WLAN_DEVICE
 LOCAL_CFLAGS := -DFWDUMP_$(BOARD_WLAN_DEVICE)
 endif
 
-LOCAL_SRC_FILES := dumpstate.cpp utils.cpp
+LOCAL_SRC_FILES := $(COMMON_SRC_FILES) \
+        dumpstate.cpp
 
 LOCAL_MODULE := dumpstate
 
-LOCAL_SHARED_LIBRARIES := libcutils liblog libselinux libbase libhardware_legacy
-# ZipArchive support, the order matters here to get all symbols.
-LOCAL_STATIC_LIBRARIES := libziparchive libz libcrypto_static
+LOCAL_SHARED_LIBRARIES := $(COMMON_SHARED_LIBRARIES)
+
+LOCAL_STATIC_LIBRARIES := $(COMMON_ZIP_LIBRARIES)
+
 LOCAL_HAL_STATIC_LIBRARIES := libdumpstate
-LOCAL_CFLAGS += -Wall -Werror -Wno-unused-parameter
+
+LOCAL_CFLAGS += $(COMMON_LOCAL_CFLAGS)
+
 LOCAL_INIT_RC := dumpstate.rc
 
 include $(BUILD_EXECUTABLE)
+
+# ===============#
+# dumpstate_test #
+# ===============#
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := dumpstate_test
+
+LOCAL_MODULE_TAGS := tests
+
+LOCAL_CFLAGS := $(COMMON_LOCAL_CFLAGS)
+
+LOCAL_SRC_FILES := $(COMMON_SRC_FILES) \
+        tests/dumpstate_test.cpp
+
+LOCAL_STATIC_LIBRARIES := $(COMMON_ZIP_LIBRARIES) \
+        libgmock
+
+LOCAL_SHARED_LIBRARIES := $(COMMON_SHARED_LIBRARIES)
+
+include $(BUILD_NATIVE_TEST)
+
+# =======================#
+# dumpstate_test_fixture #
+# =======================#
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := dumpstate_test_fixture
+
+LOCAL_MODULE_TAGS := tests
+
+LOCAL_CFLAGS := $(COMMON_LOCAL_CFLAGS)
+
+LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+
+LOCAL_SRC_FILES := \
+        tests/dumpstate_test_fixture.cpp
+
+dist_zip_root := $(TARGET_OUT_DATA)
+dumpstate_tests_subpath_from_data := nativetest/dumpstate_test_fixture
+dumpstate_tests_root_in_device := /data/$(dumpstate_tests_subpath_from_data)
+dumpstate_tests_root_for_test_zip := $(dist_zip_root)/$(dumpstate_tests_subpath_from_data)
+testdata_files := $(call find-subdir-files, testdata/*)
+
+GEN := $(addprefix $(dumpstate_tests_root_for_test_zip)/, $(testdata_files))
+$(GEN): PRIVATE_PATH := $(LOCAL_PATH)
+$(GEN): PRIVATE_CUSTOM_TOOL = cp $< $@
+$(GEN): $(dumpstate_tests_root_for_test_zip)/testdata/% : $(LOCAL_PATH)/testdata/%
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+LOCAL_PICKUP_FILES := $(dist_zip_root)
+
+include $(BUILD_NATIVE_TEST)
diff --git a/cmds/dumpstate/bugreport-format.md b/cmds/dumpstate/bugreport-format.md
index ca7d574..388b506 100644
--- a/cmds/dumpstate/bugreport-format.md
+++ b/cmds/dumpstate/bugreport-format.md
@@ -22,7 +22,7 @@
 file as the `ACTION_SEND_MULTIPLE` attachment.
 
 ## Version 1.0 (Android N)
-On _Android N (TBD)_, `dumpstate` generates a zip file directly (unless there
+On _Android N (Nougat)_, `dumpstate` generates a zip file directly (unless there
 is a failure, in which case it reverts to the flat file that is zipped by
 **Shell** and hence the end result is the _v0_ format).
 
@@ -63,8 +63,8 @@
 For example, the initial version during _Android N_ development was
 **1.0-dev1**. When `dumpsys` was split in 2 sections but not all tools were
 ready to parse that format, the version was named **1.0-dev2**,
-which had to be passed do `dumpsys` explicitly (i.e., trhough a
-`-V 1.0-dev2` argument). Once that format became stable and tools
+which had to be passed to `dumpsys` explicitly (by setting the `dumpstate.version` system property).
+Once that format became stable and tools
 knew how to parse it, the default version became **1.0-dev2**.
 
 Similarly, if changes in the file format are made after the initial release of
diff --git a/cmds/dumpstate/dumpstate.cpp b/cmds/dumpstate/dumpstate.cpp
index 41b200c..29589cd 100644
--- a/cmds/dumpstate/dumpstate.cpp
+++ b/cmds/dumpstate/dumpstate.cpp
@@ -36,9 +36,10 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
+#include <android-base/file.h>
+#include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <android-base/unique_fd.h>
-#include <android-base/file.h>
 #include <cutils/properties.h>
 #include <hardware_legacy/power.h>
 
@@ -50,23 +51,18 @@
 
 #include <openssl/sha.h>
 
-using android::base::StringPrintf;
-
 /* read before root is shed */
 static char cmdline_buf[16384] = "(unknown)";
 static const char *dump_traces_path = NULL;
 
-// TODO: variables below should be part of dumpstate object
-static unsigned long id;
-static char build_type[PROPERTY_VALUE_MAX];
-static time_t now;
+// TODO: variables and functions below should be part of dumpstate object
+
+// TODO: Can't be added to dumpstate.h because including "ziparchive/zip_writer.h" would not work.
+// That's probably because of the dumpstate -> libdumpstate -> device implementation setup, which
+// might be changed anyways - let's keep it here and wait
 static std::unique_ptr<ZipWriter> zip_writer;
 static std::set<std::string> mount_points;
 void add_mountinfo();
-int control_socket_fd = -1;
-/* suffix of the bugreport files - it's typically the date (when invoked with -d),
- * although it could be changed by the user using a system property */
-static std::string suffix;
 
 #define PSTORE_LAST_KMSG "/sys/fs/pstore/console-ramoops"
 #define ALT_PSTORE_LAST_KMSG "/sys/fs/pstore/console-ramoops-0"
@@ -92,41 +88,52 @@
 
 static tombstone_data_t tombstone_data[NUM_TOMBSTONES];
 
-const std::string ZIP_ROOT_DIR = "FS";
-std::string bugreport_dir;
-
-/*
- * List of supported zip format versions.
- *
- * See bugreport-format.txt for more info.
- */
-static std::string VERSION_DEFAULT = "1.0";
-
-bool is_user_build() {
-    return 0 == strncmp(build_type, "user", PROPERTY_VALUE_MAX - 1);
+// TODO: temporary variables and functions used during C++ refactoring
+static Dumpstate& ds = Dumpstate::GetInstance();
+static int RunCommand(const std::string& title, const std::vector<std::string>& fullCommand,
+                      const CommandOptions& options = CommandOptions::DEFAULT) {
+    return ds.RunCommand(title, fullCommand, options);
+}
+static void RunDumpsys(const std::string& title, const std::vector<std::string>& dumpsysArgs,
+                       const CommandOptions& options = CommandOptions::DEFAULT_DUMPSYS,
+                       long dumpsysTimeout = 0) {
+    return ds.RunDumpsys(title, dumpsysArgs, options, dumpsysTimeout);
+}
+static int DumpFile(const std::string& title, const std::string& path) {
+    return ds.DumpFile(title, path);
+}
+bool IsUserBuild() {
+    return ds.IsUserBuild();
 }
 
-/* gets the tombstone data, according to the bugreport type: if zipped gets all tombstones,
- * otherwise gets just those modified in the last half an hour. */
+// Relative directory (inside the zip) for all files copied as-is into the bugreport.
+static const std::string ZIP_ROOT_DIR = "FS";
+
+static constexpr char PROPERTY_EXTRA_OPTIONS[] = "dumpstate.options";
+static constexpr char PROPERTY_LAST_ID[] = "dumpstate.last_id";
+static constexpr char PROPERTY_VERSION[] = "dumpstate.version";
+
+/* gets the tombstone data, according to the bugreport type: if zipped, gets all tombstones;
+ * otherwise, gets just those modified in the last half an hour. */
 static void get_tombstone_fds(tombstone_data_t data[NUM_TOMBSTONES]) {
-    time_t thirty_minutes_ago = now - 60*30;
+    time_t thirty_minutes_ago = ds.now_ - 60 * 30;
     for (size_t i = 0; i < NUM_TOMBSTONES; i++) {
         snprintf(data[i].name, sizeof(data[i].name), "%s%02zu", TOMBSTONE_FILE_PREFIX, i);
         int fd = TEMP_FAILURE_RETRY(open(data[i].name,
                                          O_RDONLY | O_CLOEXEC | O_NOFOLLOW | O_NONBLOCK));
         struct stat st;
-        if (fstat(fd, &st) == 0 && S_ISREG(st.st_mode) &&
-            (zip_writer || (time_t) st.st_mtime >= thirty_minutes_ago)) {
-        data[i].fd = fd;
+        if (fstat(fd, &st) == 0 && S_ISREG(st.st_mode) && st.st_size > 0 &&
+            (ds.IsZipping() || st.st_mtime >= thirty_minutes_ago)) {
+            data[i].fd = fd;
         } else {
-        close(fd);
+            close(fd);
             data[i].fd = -1;
         }
     }
 }
 
 // for_each_pid() callback to get mount info about a process.
-void do_mountinfo(int pid, const char *name) {
+void do_mountinfo(int pid, const char* name __attribute__((unused))) {
     char path[PATH_MAX];
 
     // Gets the the content of the /proc/PID/ns/mnt link, so only unique mount points
@@ -143,7 +150,7 @@
     if (mount_points.find(linkname) == mount_points.end()) {
         // First time this mount point was found: add it
         snprintf(path, sizeof(path), "/proc/%d/mountinfo", pid);
-        if (add_zip_entry(ZIP_ROOT_DIR + path, path)) {
+        if (ds.AddZipEntry(ZIP_ROOT_DIR + path, path)) {
             mount_points.insert(linkname);
         } else {
             MYLOGE("Unable to add mountinfo %s to zip file\n", path);
@@ -152,12 +159,12 @@
 }
 
 void add_mountinfo() {
-    if (!is_zipping()) return;
-    const char *title = "MOUNT INFO";
+    if (!ds.IsZipping()) return;
+    std::string title = "MOUNT INFO";
     mount_points.clear();
-    DurationReporter duration_reporter(title, NULL);
-    for_each_pid(do_mountinfo, NULL);
-    MYLOGD("%s: %d entries added to zip file\n", title, (int) mount_points.size());
+    DurationReporter duration_reporter(title, nullptr);
+    for_each_pid(do_mountinfo, nullptr);
+    MYLOGD("%s: %d entries added to zip file\n", title.c_str(), (int)mount_points.size());
 }
 
 static void dump_dev_files(const char *title, const char *driverpath, const char *filename)
@@ -176,7 +183,7 @@
             continue;
         }
         snprintf(path, sizeof(path), "%s/%s/%s", driverpath, de->d_name, filename);
-        dump_file(title, path);
+        DumpFile(title, path);
     }
 
     closedir(d);
@@ -226,8 +233,8 @@
     long long cur_size = 0;
     const char *trace_path = "/data/misc/anrd/";
 
-    if (!zip_writer) {
-        MYLOGE("Not dumping anrd trace because zip_writer is not set\n");
+    if (!ds.IsZipping()) {
+        MYLOGE("Not dumping anrd trace because it's not a zipped bugreport\n");
         return false;
     }
 
@@ -244,7 +251,8 @@
 
         // send SIGUSR1 to the anrd to generate a trace.
         sprintf(buf, "%u", pid);
-        if (run_command("ANRD_DUMP", 1, "kill", "-SIGUSR1", buf, NULL)) {
+        if (RunCommand("ANRD_DUMP", {"kill", "-SIGUSR1", buf},
+                       CommandOptions::WithTimeout(1).Build())) {
             MYLOGE("anrd signal timed out. Please manually collect trace\n");
             return false;
         }
@@ -297,7 +305,7 @@
                 }
             }
             // Add to the zip file.
-            if (!add_zip_entry("anrd_trace.txt", path)) {
+            if (!ds.AddZipEntry("anrd_trace.txt", path)) {
                 MYLOGE("Unable to add anrd_trace file %s to zip file\n", path);
             } else {
                 if (remove(path)) {
@@ -313,11 +321,11 @@
 }
 
 static void dump_systrace() {
-    if (!is_zipping()) {
-        MYLOGD("Not dumping systrace because dumpstate is not zipping\n");
+    if (!ds.IsZipping()) {
+        MYLOGD("Not dumping systrace because it's not a zipped bugreport\n");
         return;
     }
-    std::string systrace_path = bugreport_dir + "/systrace-" + suffix + ".txt";
+    std::string systrace_path = ds.GetPath("-systrace.txt");
     if (systrace_path.empty()) {
         MYLOGE("Not dumping systrace because path is empty\n");
         return;
@@ -334,17 +342,17 @@
 
     MYLOGD("Running '/system/bin/atrace --async_dump -o %s', which can take several minutes",
             systrace_path.c_str());
-    if (run_command("SYSTRACE", 120, "/system/bin/atrace", "--async_dump", "-o",
-            systrace_path.c_str(), NULL)) {
+    if (RunCommand("SYSTRACE", {"/system/bin/atrace", "--async_dump", "-o", systrace_path},
+                   CommandOptions::WithTimeout(120).Build())) {
         MYLOGE("systrace timed out, its zip entry will be incomplete\n");
-        // TODO: run_command tries to kill the process, but atrace doesn't die peacefully; ideally,
-        // we should call strace to stop itself, but there is no such option yet (just a
-        // --async_stop, which stops and dump
-        //        if (run_command("SYSTRACE", 10, "/system/bin/atrace", "--kill", NULL)) {
-        //            MYLOGE("could not stop systrace ");
-        //        }
+        // TODO: RunCommand tries to kill the process, but atrace doesn't die
+        // peacefully; ideally, we should call strace to stop itself, but there is no such option
+        // yet (just a --async_stop, which stops and dump
+        // if (RunCommand("SYSTRACE", {"/system/bin/atrace", "--kill"})) {
+        //   MYLOGE("could not stop systrace ");
+        // }
     }
-    if (!add_zip_entry("systrace.txt", systrace_path)) {
+    if (!ds.AddZipEntry("systrace.txt", systrace_path)) {
         MYLOGE("Unable to add systrace file %s to zip file\n", systrace_path.c_str());
     } else {
         if (remove(systrace_path.c_str())) {
@@ -354,13 +362,13 @@
 }
 
 static void dump_raft() {
-    if (is_user_build()) {
+    if (IsUserBuild()) {
         return;
     }
 
-    std::string raft_log_path = bugreport_dir + "/raft_log.txt";
-    if (raft_log_path.empty()) {
-        MYLOGD("raft_log_path is empty\n");
+    std::string raft_path = ds.GetPath("-raft_log.txt");
+    if (raft_path.empty()) {
+        MYLOGD("raft_path is empty\n");
         return;
     }
 
@@ -370,19 +378,19 @@
         return;
     }
 
-    if (!is_zipping()) {
-        // Write compressed and encoded raft logs to stdout if not zip_writer.
-        run_command("RAFT LOGS", 600, "logcompressor", "-r", RAFT_DIR, NULL);
+    CommandOptions options = CommandOptions::WithTimeout(600).Build();
+    if (!ds.IsZipping()) {
+        // Write compressed and encoded raft logs to stdout if it's not a zipped bugreport.
+        RunCommand("RAFT LOGS", {"logcompressor", "-r", RAFT_DIR}, options);
         return;
     }
 
-    run_command("RAFT LOGS", 600, "logcompressor", "-n", "-r", RAFT_DIR,
-            "-o", raft_log_path.c_str(), NULL);
-    if (!add_zip_entry("raft_log.txt", raft_log_path)) {
-        MYLOGE("Unable to add raft log %s to zip file\n", raft_log_path.c_str());
+    RunCommand("RAFT LOGS", {"logcompressor", "-n", "-r", RAFT_DIR, "-o", raft_path}, options);
+    if (!ds.AddZipEntry("raft_log.txt", raft_path)) {
+        MYLOGE("Unable to add raft log %s to zip file\n", raft_path.c_str());
     } else {
-        if (remove(raft_log_path.c_str())) {
-            MYLOGE("Error removing raft file %s: %s\n", raft_log_path.c_str(), strerror(errno));
+        if (remove(raft_path.c_str())) {
+            MYLOGE("Error removing raft file %s: %s\n", raft_path.c_str(), strerror(errno));
         }
     }
 }
@@ -396,7 +404,7 @@
     return strcmp(path + len - sizeof(stat) + 1, stat); /* .../stat? */
 }
 
-static bool skip_none(const char *path) {
+static bool skip_none(const char* path __attribute__((unused))) {
     return false;
 }
 
@@ -578,39 +586,42 @@
     return 10 * (property_size + worst_write_perf) / worst_write_perf;
 }
 
-/* dumps the current system state to stdout */
-static void print_header(std::string version) {
-    char build[PROPERTY_VALUE_MAX], fingerprint[PROPERTY_VALUE_MAX];
-    char radio[PROPERTY_VALUE_MAX], bootloader[PROPERTY_VALUE_MAX];
-    char network[PROPERTY_VALUE_MAX], date[80];
+void Dumpstate::PrintHeader() const {
+    std::string build, fingerprint, radio, bootloader, network;
+    char date[80];
 
-    property_get("ro.build.display.id", build, "(unknown)");
-    property_get("ro.build.fingerprint", fingerprint, "(unknown)");
-    property_get("ro.build.type", build_type, "(unknown)");
-    property_get("gsm.version.baseband", radio, "(unknown)");
-    property_get("ro.bootloader", bootloader, "(unknown)");
-    property_get("gsm.operator.alpha", network, "(unknown)");
-    strftime(date, sizeof(date), "%Y-%m-%d %H:%M:%S", localtime(&now));
+    build = android::base::GetProperty("ro.build.display.id", "(unknown)");
+    fingerprint = android::base::GetProperty("ro.build.fingerprint", "(unknown)");
+    radio = android::base::GetProperty("gsm.version.baseband", "(unknown)");
+    bootloader = android::base::GetProperty("ro.bootloader", "(unknown)");
+    network = android::base::GetProperty("gsm.operator.alpha", "(unknown)");
+    strftime(date, sizeof(date), "%Y-%m-%d %H:%M:%S", localtime(&now_));
 
     printf("========================================================\n");
     printf("== dumpstate: %s\n", date);
     printf("========================================================\n");
 
     printf("\n");
-    printf("Build: %s\n", build);
-    printf("Build fingerprint: '%s'\n", fingerprint); /* format is important for other tools */
-    printf("Bootloader: %s\n", bootloader);
-    printf("Radio: %s\n", radio);
-    printf("Network: %s\n", network);
+    printf("Build: %s\n", build.c_str());
+    // NOTE: fingerprint entry format is important for other tools.
+    printf("Build fingerprint: '%s'\n", fingerprint.c_str());
+    printf("Bootloader: %s\n", bootloader.c_str());
+    printf("Radio: %s\n", radio.c_str());
+    printf("Network: %s\n", network.c_str());
 
     printf("Kernel: ");
-    dump_file(NULL, "/proc/version");
+    JustDumpFile("", "/proc/version");
     printf("Command line: %s\n", strtok(cmdline_buf, "\n"));
-    printf("Bugreport format version: %s\n", version.c_str());
-    printf("Dumpstate info: id=%lu pid=%d\n", id, getpid());
+    printf("Bugreport format version: %s\n", version_.c_str());
+    printf("Dumpstate info: id=%lu pid=%d dry_run=%d args=%s extra_options=%s\n", id_, getpid(),
+           dry_run_, args_.c_str(), extra_options_.c_str());
     printf("\n");
 }
 
+bool Dumpstate::IsZipping() const {
+    return zip_writer != nullptr;
+}
+
 // List of file extensions that can cause a zip file attachment to be rejected by some email
 // service providers.
 static const std::set<std::string> PROBLEMATIC_FILE_EXTENSIONS = {
@@ -619,10 +630,10 @@
       ".shb", ".sys", ".vb",  ".vbe", ".vbs", ".vxd", ".wsc", ".wsf", ".wsh"
 };
 
-bool add_zip_entry_from_fd(const std::string& entry_name, int fd) {
-    if (!is_zipping()) {
-        MYLOGD("Not adding entry %s from fd because dumpstate is not zipping\n",
-                entry_name.c_str());
+bool Dumpstate::AddZipEntryFromFd(const std::string& entry_name, int fd) {
+    if (!IsZipping()) {
+        MYLOGD("Not adding zip entry %s from fd because it's not a zipped bugreport\n",
+               entry_name.c_str());
         return false;
     }
     std::string valid_name = entry_name;
@@ -640,17 +651,17 @@
 
     // Logging statement  below is useful to time how long each entry takes, but it's too verbose.
     // MYLOGD("Adding zip entry %s\n", entry_name.c_str());
-    int32_t err = zip_writer->StartEntryWithTime(valid_name.c_str(),
-            ZipWriter::kCompress, get_mtime(fd, now));
-    if (err) {
+    int32_t err = zip_writer->StartEntryWithTime(valid_name.c_str(), ZipWriter::kCompress,
+                                                 get_mtime(fd, ds.now_));
+    if (err != 0) {
         MYLOGE("zip_writer->StartEntryWithTime(%s): %s\n", valid_name.c_str(),
-                ZipWriter::ErrorCodeString(err));
+               ZipWriter::ErrorCodeString(err));
         return false;
     }
 
     std::vector<uint8_t> buffer(65536);
     while (1) {
-        ssize_t bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer.data(), sizeof(buffer)));
+        ssize_t bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer.data(), buffer.size()));
         if (bytes_read == 0) {
             break;
         } else if (bytes_read == -1) {
@@ -665,7 +676,7 @@
     }
 
     err = zip_writer->FinishEntry();
-    if (err) {
+    if (err != 0) {
         MYLOGE("zip_writer->FinishEntry(): %s\n", ZipWriter::ErrorCodeString(err));
         return false;
     }
@@ -673,60 +684,55 @@
     return true;
 }
 
-bool add_zip_entry(const std::string& entry_name, const std::string& entry_path) {
-    android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(entry_path.c_str(), O_RDONLY | O_NONBLOCK
-            | O_CLOEXEC)));
+bool Dumpstate::AddZipEntry(const std::string& entry_name, const std::string& entry_path) {
+    android::base::unique_fd fd(
+        TEMP_FAILURE_RETRY(open(entry_path.c_str(), O_RDONLY | O_NONBLOCK | O_CLOEXEC)));
     if (fd == -1) {
         MYLOGE("open(%s): %s\n", entry_path.c_str(), strerror(errno));
         return false;
     }
 
-    return add_zip_entry_from_fd(entry_name, fd.get());
+    return AddZipEntryFromFd(entry_name, fd.get());
 }
 
 /* adds a file to the existing zipped bugreport */
-static int _add_file_from_fd(const char *title, const char *path, int fd) {
-    return add_zip_entry_from_fd(ZIP_ROOT_DIR + path, fd) ? 0 : 1;
+static int _add_file_from_fd(const char* title __attribute__((unused)), const char* path, int fd) {
+    return ds.AddZipEntryFromFd(ZIP_ROOT_DIR + path, fd) ? 0 : 1;
 }
 
-// TODO: move to util.cpp
-void add_dir(const char *dir, bool recursive) {
-    if (!is_zipping()) {
-        MYLOGD("Not adding dir %s because dumpstate is not zipping\n", dir);
+void Dumpstate::AddDir(const std::string& dir, bool recursive) {
+    if (!IsZipping()) {
+        MYLOGD("Not adding dir %s because it's not a zipped bugreport\n", dir.c_str());
         return;
     }
-    MYLOGD("Adding dir %s (recursive: %d)\n", dir, recursive);
-    DurationReporter duration_reporter(dir, NULL);
-    dump_files(NULL, dir, recursive ? skip_none : is_dir, _add_file_from_fd);
+    MYLOGD("Adding dir %s (recursive: %d)\n", dir.c_str(), recursive);
+    DurationReporter duration_reporter(dir, nullptr);
+    dump_files("", dir.c_str(), recursive ? skip_none : is_dir, _add_file_from_fd);
 }
 
-bool is_zipping() {
-    return zip_writer != nullptr;
-}
-
-/* adds a text entry entry to the existing zip file. */
-static bool add_text_zip_entry(const std::string& entry_name, const std::string& content) {
-    if (!is_zipping()) {
-        MYLOGD("Not adding text entry %s because dumpstate is not zipping\n", entry_name.c_str());
+bool Dumpstate::AddTextZipEntry(const std::string& entry_name, const std::string& content) {
+    if (!IsZipping()) {
+        MYLOGD("Not adding text zip entry %s because it's not a zipped bugreport\n",
+               entry_name.c_str());
         return false;
     }
     MYLOGD("Adding zip text entry %s\n", entry_name.c_str());
-    int32_t err = zip_writer->StartEntryWithTime(entry_name.c_str(), ZipWriter::kCompress, now);
-    if (err) {
+    int32_t err = zip_writer->StartEntryWithTime(entry_name.c_str(), ZipWriter::kCompress, ds.now_);
+    if (err != 0) {
         MYLOGE("zip_writer->StartEntryWithTime(%s): %s\n", entry_name.c_str(),
-                ZipWriter::ErrorCodeString(err));
+               ZipWriter::ErrorCodeString(err));
         return false;
     }
 
     err = zip_writer->WriteBytes(content.c_str(), content.length());
-    if (err) {
+    if (err != 0) {
         MYLOGE("zip_writer->WriteBytes(%s): %s\n", entry_name.c_str(),
-                ZipWriter::ErrorCodeString(err));
+               ZipWriter::ErrorCodeString(err));
         return false;
     }
 
     err = zip_writer->FinishEntry();
-    if (err) {
+    if (err != 0) {
         MYLOGE("zip_writer->FinishEntry(): %s\n", ZipWriter::ErrorCodeString(err));
         return false;
     }
@@ -735,130 +741,128 @@
 }
 
 static void dump_iptables() {
-    run_command("IPTABLES", 10, "iptables", "-L", "-nvx", NULL);
-    run_command("IP6TABLES", 10, "ip6tables", "-L", "-nvx", NULL);
-    run_command("IPTABLES NAT", 10, "iptables", "-t", "nat", "-L", "-nvx", NULL);
+    RunCommand("IPTABLES", {"iptables", "-L", "-nvx"});
+    RunCommand("IP6TABLES", {"ip6tables", "-L", "-nvx"});
+    RunCommand("IPTABLES NAT", {"iptables", "-t", "nat", "-L", "-nvx"});
     /* no ip6 nat */
-    run_command("IPTABLES MANGLE", 10, "iptables", "-t", "mangle", "-L", "-nvx", NULL);
-    run_command("IP6TABLES MANGLE", 10, "ip6tables", "-t", "mangle", "-L", "-nvx", NULL);
-    run_command("IPTABLES RAW", 10, "iptables", "-t", "raw", "-L", "-nvx", NULL);
-    run_command("IP6TABLES RAW", 10, "ip6tables", "-t", "raw", "-L", "-nvx", NULL);
+    RunCommand("IPTABLES MANGLE", {"iptables", "-t", "mangle", "-L", "-nvx"});
+    RunCommand("IP6TABLES MANGLE", {"ip6tables", "-t", "mangle", "-L", "-nvx"});
+    RunCommand("IPTABLES RAW", {"iptables", "-t", "raw", "-L", "-nvx"});
+    RunCommand("IP6TABLES RAW", {"ip6tables", "-t", "raw", "-L", "-nvx"});
 }
 
-static void dumpstate(const std::string& screenshot_path, const std::string& version) {
+static void dumpstate() {
     DurationReporter duration_reporter("DUMPSTATE");
     unsigned long timeout;
 
     dump_dev_files("TRUSTY VERSION", "/sys/bus/platform/drivers/trusty", "trusty_version");
-    run_command("UPTIME", 10, "uptime", NULL);
+    RunCommand("UPTIME", {"uptime"});
     dump_files("UPTIME MMC PERF", mmcblk0, skip_not_stat, dump_stat_from_fd);
     dump_emmc_ecsd("/d/mmc0/mmc0:0001/ext_csd");
-    dump_file("MEMORY INFO", "/proc/meminfo");
-    run_command("CPU INFO", 10, "top", "-b", "-n", "1", "-H", "-s", "6",
-                "-o", "pid,tid,user,pr,ni,%cpu,s,virt,res,pcy,cmd,name", NULL);
-    run_command("PROCRANK", 20, SU_PATH, "root", "procrank", NULL);
-    dump_file("VIRTUAL MEMORY STATS", "/proc/vmstat");
-    dump_file("VMALLOC INFO", "/proc/vmallocinfo");
-    dump_file("SLAB INFO", "/proc/slabinfo");
-    dump_file("ZONEINFO", "/proc/zoneinfo");
-    dump_file("PAGETYPEINFO", "/proc/pagetypeinfo");
-    dump_file("BUDDYINFO", "/proc/buddyinfo");
-    dump_file("FRAGMENTATION INFO", "/d/extfrag/unusable_index");
+    DumpFile("MEMORY INFO", "/proc/meminfo");
+    RunCommand("CPU INFO", {"top", "-b", "-n", "1", "-H", "-s", "6", "-o",
+                            "pid,tid,user,pr,ni,%cpu,s,virt,res,pcy,cmd,name"});
+    RunCommand("PROCRANK", {"procrank"}, CommandOptions::AS_ROOT_20);
+    DumpFile("VIRTUAL MEMORY STATS", "/proc/vmstat");
+    DumpFile("VMALLOC INFO", "/proc/vmallocinfo");
+    DumpFile("SLAB INFO", "/proc/slabinfo");
+    DumpFile("ZONEINFO", "/proc/zoneinfo");
+    DumpFile("PAGETYPEINFO", "/proc/pagetypeinfo");
+    DumpFile("BUDDYINFO", "/proc/buddyinfo");
+    DumpFile("FRAGMENTATION INFO", "/d/extfrag/unusable_index");
 
-    dump_file("KERNEL WAKE SOURCES", "/d/wakeup_sources");
-    dump_file("KERNEL CPUFREQ", "/sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state");
-    dump_file("KERNEL SYNC", "/d/sync");
+    DumpFile("KERNEL WAKE SOURCES", "/d/wakeup_sources");
+    DumpFile("KERNEL CPUFREQ", "/sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state");
+    DumpFile("KERNEL SYNC", "/d/sync");
 
-    run_command("PROCESSES AND THREADS", 10, "ps", "-A", "-T", "-Z",
-                "-O", "pri,nice,rtprio,sched,pcy", NULL);
-    run_command("LIBRANK", 10, SU_PATH, "root", "librank", NULL);
+    RunCommand("PROCESSES AND THREADS",
+               {"ps", "-A", "-T", "-Z", "-O", "pri,nice,rtprio,sched,pcy"});
+    RunCommand("LIBRANK", {"librank"}, CommandOptions::AS_ROOT_10);
 
-    run_command("PRINTENV", 10, "printenv", NULL);
-    run_command("NETSTAT", 10, "netstat", "-n", NULL);
-    run_command("LSMOD", 10, "lsmod", NULL);
+    RunCommand("PRINTENV", {"printenv"});
+    RunCommand("NETSTAT", {"netstat", "-n"});
+    struct stat s;
+    if (stat("/proc/modules", &s) != 0) {
+        MYLOGD("Skipping 'lsmod' because /proc/modules does not exist\n");
+    } else {
+        RunCommand("LSMOD", {"lsmod"});
+    }
 
     do_dmesg();
 
-    run_command("LIST OF OPEN FILES", 10, SU_PATH, "root", "lsof", NULL);
+    RunCommand("LIST OF OPEN FILES", {"lsof"}, CommandOptions::AS_ROOT_10);
     for_each_pid(do_showmap, "SMAPS OF ALL PROCESSES");
     for_each_tid(show_wchan, "BLOCKED PROCESS WAIT-CHANNELS");
     for_each_pid(show_showtime, "PROCESS TIMES (pid cmd user system iowait+percentage)");
 
     /* Dump Bluetooth HCI logs */
-    add_dir("/data/misc/bluetooth/logs", true);
+    ds.AddDir("/data/misc/bluetooth/logs", true);
 
-    if (!screenshot_path.empty()) {
+    if (!ds.do_early_screenshot_) {
         MYLOGI("taking late screenshot\n");
-        take_screenshot(screenshot_path);
-        MYLOGI("wrote screenshot: %s\n", screenshot_path.c_str());
+        ds.TakeScreenshot();
     }
 
-    // dump_file("EVENT LOG TAGS", "/etc/event-log-tags");
+    // DumpFile("EVENT LOG TAGS", "/etc/event-log-tags");
     // calculate timeout
     timeout = logcat_timeout("main") + logcat_timeout("system") + logcat_timeout("crash");
     if (timeout < 20000) {
         timeout = 20000;
     }
-    run_command("SYSTEM LOG", timeout / 1000, "logcat", "-v", "threadtime",
-                                                        "-v", "printable",
-                                                        "-d",
-                                                        "*:v", NULL);
+    RunCommand("SYSTEM LOG", {"logcat", "-v", "threadtime", "-v", "printable", "-d", "*:v"},
+               CommandOptions::WithTimeout(timeout / 1000).Build());
     timeout = logcat_timeout("events");
     if (timeout < 20000) {
         timeout = 20000;
     }
-    run_command("EVENT LOG", timeout / 1000, "logcat", "-b", "events",
-                                                       "-v", "threadtime",
-                                                       "-v", "printable",
-                                                       "-d",
-                                                       "*:v", NULL);
+    RunCommand("EVENT LOG",
+               {"logcat", "-b", "events", "-v", "threadtime", "-v", "printable", "-d", "*:v"},
+               CommandOptions::WithTimeout(timeout / 1000).Build());
     timeout = logcat_timeout("radio");
     if (timeout < 20000) {
         timeout = 20000;
     }
-    run_command("RADIO LOG", timeout / 1000, "logcat", "-b", "radio",
-                                                       "-v", "threadtime",
-                                                       "-v", "printable",
-                                                       "-d",
-                                                       "*:v", NULL);
+    RunCommand("RADIO LOG",
+               {"logcat", "-b", "radio", "-v", "threadtime", "-v", "printable", "-d", "*:v"},
+               CommandOptions::WithTimeout(timeout / 1000).Build());
 
-    run_command("LOG STATISTICS", 10, "logcat", "-b", "all", "-S", NULL);
+    RunCommand("LOG STATISTICS", {"logcat", "-b", "all", "-S"});
 
     /* show the traces we collected in main(), if that was done */
     if (dump_traces_path != NULL) {
-        dump_file("VM TRACES JUST NOW", dump_traces_path);
+        DumpFile("VM TRACES JUST NOW", dump_traces_path);
     }
 
     /* only show ANR traces if they're less than 15 minutes old */
     struct stat st;
-    char anr_traces_path[PATH_MAX];
-    property_get("dalvik.vm.stack-trace-file", anr_traces_path, "");
-    if (!anr_traces_path[0]) {
+    std::string anrTracesPath = android::base::GetProperty("dalvik.vm.stack-trace-file", "");
+    if (anrTracesPath.empty()) {
         printf("*** NO VM TRACES FILE DEFINED (dalvik.vm.stack-trace-file)\n\n");
     } else {
-      int fd = TEMP_FAILURE_RETRY(open(anr_traces_path,
-                                       O_RDONLY | O_CLOEXEC | O_NOFOLLOW | O_NONBLOCK));
-      if (fd < 0) {
-          printf("*** NO ANR VM TRACES FILE (%s): %s\n\n", anr_traces_path, strerror(errno));
+        int fd = TEMP_FAILURE_RETRY(
+            open(anrTracesPath.c_str(), O_RDONLY | O_CLOEXEC | O_NOFOLLOW | O_NONBLOCK));
+        if (fd < 0) {
+            printf("*** NO ANR VM TRACES FILE (%s): %s\n\n", anrTracesPath.c_str(), strerror(errno));
       } else {
-          dump_file_from_fd("VM TRACES AT LAST ANR", anr_traces_path, fd);
+          dump_file_from_fd("VM TRACES AT LAST ANR", anrTracesPath.c_str(), fd);
       }
     }
 
     /* slow traces for slow operations */
-    if (anr_traces_path[0] != 0) {
-        int tail = strlen(anr_traces_path)-1;
-        while (tail > 0 && anr_traces_path[tail] != '/') {
+    if (!anrTracesPath.empty()) {
+        int tail = anrTracesPath.size() - 1;
+        while (tail > 0 && anrTracesPath.at(tail) != '/') {
             tail--;
         }
         int i = 0;
         while (1) {
-            sprintf(anr_traces_path+tail+1, "slow%02d.txt", i);
-            if (stat(anr_traces_path, &st)) {
+            anrTracesPath =
+                anrTracesPath.substr(0, tail + 1) + android::base::StringPrintf("slow%02d.txt", i);
+            if (stat(anrTracesPath.c_str(), &st)) {
                 // No traces file at this index, done with the files.
                 break;
             }
-            dump_file("VM TRACES WHEN SLOW", anr_traces_path);
+            DumpFile("VM TRACES WHEN SLOW", anrTracesPath.c_str());
             i++;
         }
     }
@@ -869,8 +873,8 @@
             const char *name = tombstone_data[i].name;
             int fd = tombstone_data[i].fd;
             dumped = 1;
-            if (zip_writer) {
-                if (!add_zip_entry_from_fd(ZIP_ROOT_DIR + name, fd)) {
+            if (ds.IsZipping()) {
+                if (!ds.AddZipEntryFromFd(ZIP_ROOT_DIR + name, fd)) {
                     MYLOGE("Unable to add tombstone %s to zip file\n", name);
                 }
             } else {
@@ -884,191 +888,189 @@
         printf("*** NO TOMBSTONES to dump in %s\n\n", TOMBSTONE_DIR);
     }
 
-    dump_file("NETWORK DEV INFO", "/proc/net/dev");
-    dump_file("QTAGUID NETWORK INTERFACES INFO", "/proc/net/xt_qtaguid/iface_stat_all");
-    dump_file("QTAGUID NETWORK INTERFACES INFO (xt)", "/proc/net/xt_qtaguid/iface_stat_fmt");
-    dump_file("QTAGUID CTRL INFO", "/proc/net/xt_qtaguid/ctrl");
-    dump_file("QTAGUID STATS INFO", "/proc/net/xt_qtaguid/stats");
+    DumpFile("NETWORK DEV INFO", "/proc/net/dev");
+    DumpFile("QTAGUID NETWORK INTERFACES INFO", "/proc/net/xt_qtaguid/iface_stat_all");
+    DumpFile("QTAGUID NETWORK INTERFACES INFO (xt)", "/proc/net/xt_qtaguid/iface_stat_fmt");
+    DumpFile("QTAGUID CTRL INFO", "/proc/net/xt_qtaguid/ctrl");
+    DumpFile("QTAGUID STATS INFO", "/proc/net/xt_qtaguid/stats");
 
     if (!stat(PSTORE_LAST_KMSG, &st)) {
         /* Also TODO: Make console-ramoops CAP_SYSLOG protected. */
-        dump_file("LAST KMSG", PSTORE_LAST_KMSG);
+        DumpFile("LAST KMSG", PSTORE_LAST_KMSG);
     } else if (!stat(ALT_PSTORE_LAST_KMSG, &st)) {
-        dump_file("LAST KMSG", ALT_PSTORE_LAST_KMSG);
+        DumpFile("LAST KMSG", ALT_PSTORE_LAST_KMSG);
     } else {
         /* TODO: Make last_kmsg CAP_SYSLOG protected. b/5555691 */
-        dump_file("LAST KMSG", "/proc/last_kmsg");
+        DumpFile("LAST KMSG", "/proc/last_kmsg");
     }
 
     /* kernels must set CONFIG_PSTORE_PMSG, slice up pstore with device tree */
-    run_command("LAST LOGCAT", 10, "logcat", "-L",
-                                             "-b", "all",
-                                             "-v", "threadtime",
-                                             "-v", "printable",
-                                             "-d",
-                                             "*:v", NULL);
+    RunCommand("LAST LOGCAT",
+               {"logcat", "-L", "-b", "all", "-v", "threadtime", "-v", "printable", "-d", "*:v"});
 
     /* The following have a tendency to get wedged when wifi drivers/fw goes belly-up. */
 
-    run_command("NETWORK INTERFACES", 10, "ip", "link", NULL);
+    RunCommand("NETWORK INTERFACES", {"ip", "link"});
 
-    run_command("IPv4 ADDRESSES", 10, "ip", "-4", "addr", "show", NULL);
-    run_command("IPv6 ADDRESSES", 10, "ip", "-6", "addr", "show", NULL);
+    RunCommand("IPv4 ADDRESSES", {"ip", "-4", "addr", "show"});
+    RunCommand("IPv6 ADDRESSES", {"ip", "-6", "addr", "show"});
 
-    run_command("IP RULES", 10, "ip", "rule", "show", NULL);
-    run_command("IP RULES v6", 10, "ip", "-6", "rule", "show", NULL);
+    RunCommand("IP RULES", {"ip", "rule", "show"});
+    RunCommand("IP RULES v6", {"ip", "-6", "rule", "show"});
 
     dump_route_tables();
 
-    run_command("ARP CACHE", 10, "ip", "-4", "neigh", "show", NULL);
-    run_command("IPv6 ND CACHE", 10, "ip", "-6", "neigh", "show", NULL);
-    run_command("MULTICAST ADDRESSES", 10, "ip", "maddr", NULL);
-    run_command("WIFI NETWORKS", 20, "wpa_cli", "IFNAME=wlan0", "list_networks", NULL);
+    RunCommand("ARP CACHE", {"ip", "-4", "neigh", "show"});
+    RunCommand("IPv6 ND CACHE", {"ip", "-6", "neigh", "show"});
+    RunCommand("MULTICAST ADDRESSES", {"ip", "maddr"});
+    RunCommand("WIFI NETWORKS", {"wpa_cli", "IFNAME=wlan0", "list_networks"},
+               CommandOptions::WithTimeout(20).Build());
 
 #ifdef FWDUMP_bcmdhd
-    run_command("ND OFFLOAD TABLE", 5,
-            SU_PATH, "root", WLUTIL, "nd_hostip", NULL);
+    RunCommand("ND OFFLOAD TABLE", {WLUTIL, "nd_hostip"}, CommandOptions::AS_ROOT_5);
 
-    run_command("DUMP WIFI INTERNAL COUNTERS (1)", 20,
-            SU_PATH, "root", WLUTIL, "counters", NULL);
+    RunCommand("DUMP WIFI INTERNAL COUNTERS (1)", {WLUTIL, "counters"}, CommandOptions::AS_ROOT_20);
 
-    run_command("ND OFFLOAD STATUS (1)", 5,
-            SU_PATH, "root", WLUTIL, "nd_status", NULL);
+    RunCommand("ND OFFLOAD STATUS (1)", {WLUTIL, "nd_status"}, CommandOptions::AS_ROOT_5);
 
 #endif
-    dump_file("INTERRUPTS (1)", "/proc/interrupts");
+    DumpFile("INTERRUPTS (1)", "/proc/interrupts");
 
-    run_command("NETWORK DIAGNOSTICS", 10, "dumpsys", "-t", "10", "connectivity", "--diag", NULL);
+    RunDumpsys("NETWORK DIAGNOSTICS", {"connectivity", "--diag"},
+               CommandOptions::WithTimeout(10).Build());
 
 #ifdef FWDUMP_bcmdhd
-    run_command("DUMP WIFI STATUS", 20,
-            SU_PATH, "root", "dhdutil", "-i", "wlan0", "dump", NULL);
+    RunCommand("DUMP WIFI STATUS", {"dhdutil", "-i", "wlan0", "dump"}, CommandOptions::AS_ROOT_20);
 
-    run_command("DUMP WIFI INTERNAL COUNTERS (2)", 20,
-            SU_PATH, "root", WLUTIL, "counters", NULL);
+    RunCommand("DUMP WIFI INTERNAL COUNTERS (2)", {WLUTIL, "counters"}, CommandOptions::AS_ROOT_20);
 
-    run_command("ND OFFLOAD STATUS (2)", 5,
-            SU_PATH, "root", WLUTIL, "nd_status", NULL);
+    RunCommand("ND OFFLOAD STATUS (2)", {WLUTIL, "nd_status"}, CommandOptions::AS_ROOT_5);
 #endif
-    dump_file("INTERRUPTS (2)", "/proc/interrupts");
+    DumpFile("INTERRUPTS (2)", "/proc/interrupts");
 
     print_properties();
 
-    run_command("VOLD DUMP", 10, "vdc", "dump", NULL);
-    run_command("SECURE CONTAINERS", 10, "vdc", "asec", "list", NULL);
+    RunCommand("VOLD DUMP", {"vdc", "dump"});
+    RunCommand("SECURE CONTAINERS", {"vdc", "asec", "list"});
 
-    run_command("FILESYSTEMS & FREE SPACE", 10, "df", NULL);
+    RunCommand("FILESYSTEMS & FREE SPACE", {"df"});
 
-    run_command("LAST RADIO LOG", 10, "parse_radio_log", "/proc/last_radio_log", NULL);
+    RunCommand("LAST RADIO LOG", {"parse_radio_log", "/proc/last_radio_log"});
 
     printf("------ BACKLIGHTS ------\n");
     printf("LCD brightness=");
-    dump_file(NULL, "/sys/class/leds/lcd-backlight/brightness");
+    DumpFile("", "/sys/class/leds/lcd-backlight/brightness");
     printf("Button brightness=");
-    dump_file(NULL, "/sys/class/leds/button-backlight/brightness");
+    DumpFile("", "/sys/class/leds/button-backlight/brightness");
     printf("Keyboard brightness=");
-    dump_file(NULL, "/sys/class/leds/keyboard-backlight/brightness");
+    DumpFile("", "/sys/class/leds/keyboard-backlight/brightness");
     printf("ALS mode=");
-    dump_file(NULL, "/sys/class/leds/lcd-backlight/als");
+    DumpFile("", "/sys/class/leds/lcd-backlight/als");
     printf("LCD driver registers:\n");
-    dump_file(NULL, "/sys/class/leds/lcd-backlight/registers");
+    DumpFile("", "/sys/class/leds/lcd-backlight/registers");
     printf("\n");
 
     /* Binder state is expensive to look at as it uses a lot of memory. */
-    dump_file("BINDER FAILED TRANSACTION LOG", "/sys/kernel/debug/binder/failed_transaction_log");
-    dump_file("BINDER TRANSACTION LOG", "/sys/kernel/debug/binder/transaction_log");
-    dump_file("BINDER TRANSACTIONS", "/sys/kernel/debug/binder/transactions");
-    dump_file("BINDER STATS", "/sys/kernel/debug/binder/stats");
-    dump_file("BINDER STATE", "/sys/kernel/debug/binder/state");
+    DumpFile("BINDER FAILED TRANSACTION LOG", "/sys/kernel/debug/binder/failed_transaction_log");
+    DumpFile("BINDER TRANSACTION LOG", "/sys/kernel/debug/binder/transaction_log");
+    DumpFile("BINDER TRANSACTIONS", "/sys/kernel/debug/binder/transactions");
+    DumpFile("BINDER STATS", "/sys/kernel/debug/binder/stats");
+    DumpFile("BINDER STATE", "/sys/kernel/debug/binder/state");
 
     printf("========================================================\n");
     printf("== Board\n");
     printf("========================================================\n");
 
-    dumpstate_board();
-    printf("\n");
+    {
+        DurationReporter tmpDr("dumpstate_board()");
+        dumpstate_board();
+        printf("\n");
+    }
 
     /* Migrate the ril_dumpstate to a dumpstate_board()? */
-    char ril_dumpstate_timeout[PROPERTY_VALUE_MAX] = {0};
-    property_get("ril.dumpstate.timeout", ril_dumpstate_timeout, "30");
-    if (strnlen(ril_dumpstate_timeout, PROPERTY_VALUE_MAX - 1) > 0) {
-        if (is_user_build()) {
-            // su does not exist on user builds, so try running without it.
-            // This way any implementations of vril-dump that do not require
-            // root can run on user builds.
-            run_command("DUMP VENDOR RIL LOGS", atoi(ril_dumpstate_timeout),
-                    "vril-dump", NULL);
-        } else {
-            run_command("DUMP VENDOR RIL LOGS", atoi(ril_dumpstate_timeout),
-                    SU_PATH, "root", "vril-dump", NULL);
+    int rilDumpstateTimeout = android::base::GetIntProperty("ril.dumpstate.timeout", 0);
+    if (rilDumpstateTimeout > 0) {
+        // su does not exist on user builds, so try running without it.
+        // This way any implementations of vril-dump that do not require
+        // root can run on user builds.
+        CommandOptions::CommandOptionsBuilder options =
+            CommandOptions::WithTimeout(rilDumpstateTimeout);
+        if (!IsUserBuild()) {
+            options.AsRoot();
         }
+        RunCommand("DUMP VENDOR RIL LOGS", {"vril-dump"}, options.Build());
     }
 
     printf("========================================================\n");
     printf("== Android Framework Services\n");
     printf("========================================================\n");
 
-    run_command("DUMPSYS", 60, "dumpsys", "-t", "60", "--skip", "meminfo", "cpuinfo", NULL);
+    RunDumpsys("DUMPSYS", {"--skip", "meminfo", "cpuinfo"}, CommandOptions::WithTimeout(90).Build(),
+               10);
 
     printf("========================================================\n");
     printf("== Checkins\n");
     printf("========================================================\n");
 
-    run_command("CHECKIN BATTERYSTATS", 30, "dumpsys", "-t", "30", "batterystats", "-c", NULL);
-    run_command("CHECKIN MEMINFO", 30, "dumpsys", "-t", "30", "meminfo", "--checkin", NULL);
-    run_command("CHECKIN NETSTATS", 30, "dumpsys", "-t", "30", "netstats", "--checkin", NULL);
-    run_command("CHECKIN PROCSTATS", 30, "dumpsys", "-t", "30", "procstats", "-c", NULL);
-    run_command("CHECKIN USAGESTATS", 30, "dumpsys", "-t", "30", "usagestats", "-c", NULL);
-    run_command("CHECKIN PACKAGE", 30, "dumpsys", "-t", "30", "package", "--checkin", NULL);
+    RunDumpsys("CHECKIN BATTERYSTATS", {"batterystats", "-c"});
+    RunDumpsys("CHECKIN MEMINFO", {"meminfo", "--checkin"});
+    RunDumpsys("CHECKIN NETSTATS", {"netstats", "--checkin"});
+    RunDumpsys("CHECKIN PROCSTATS", {"procstats", "-c"});
+    RunDumpsys("CHECKIN USAGESTATS", {"usagestats", "-c"});
+    RunDumpsys("CHECKIN PACKAGE", {"package", "--checkin"});
 
     printf("========================================================\n");
     printf("== Running Application Activities\n");
     printf("========================================================\n");
 
-    run_command("APP ACTIVITIES", 30, "dumpsys", "-t", "30", "activity", "all", NULL);
+    RunDumpsys("APP ACTIVITIES", {"activity", "all"});
 
     printf("========================================================\n");
     printf("== Running Application Services\n");
     printf("========================================================\n");
 
-    run_command("APP SERVICES", 30, "dumpsys", "-t", "30", "activity", "service", "all", NULL);
+    RunDumpsys("APP SERVICES", {"activity", "service", "all"});
 
     printf("========================================================\n");
     printf("== Running Application Providers\n");
     printf("========================================================\n");
 
-    run_command("APP PROVIDERS", 30, "dumpsys", "-t", "30", "activity", "provider", "all", NULL);
-
+    RunDumpsys("APP PROVIDERS", {"activity", "provider", "all"});
 
     printf("========================================================\n");
-    printf("== Final progress (pid %d): %d/%d (originally %d)\n",
-            getpid(), progress, weight_total, WEIGHT_TOTAL);
+    printf("== Final progress (pid %d): %d/%d (originally %d)\n", getpid(), ds.progress_,
+           ds.weight_total_, WEIGHT_TOTAL);
     printf("========================================================\n");
-    printf("== dumpstate: done\n");
+    printf("== dumpstate: done (id %lu)\n", ds.id_);
     printf("========================================================\n");
 }
 
-static void usage() {
-  fprintf(stderr,
-          "usage: dumpstate [-h] [-b soundfile] [-e soundfile] [-o file [-d] [-p] "
-          "[-z]] [-s] [-S] [-q] [-B] [-P] [-R] [-V version]\n"
-          "  -h: display this help message\n"
-          "  -b: play sound file instead of vibrate, at beginning of job\n"
-          "  -e: play sound file instead of vibrate, at end of job\n"
-          "  -o: write to file (instead of stdout)\n"
-          "  -d: append date to filename (requires -o)\n"
-          "  -p: capture screenshot to filename.png (requires -o)\n"
-          "  -z: generate zipped file (requires -o)\n"
-          "  -s: write output to control socket (for init)\n"
-          "  -S: write file location to control socket (for init; requires -o and -z)"
-          "  -q: disable vibrate\n"
-          "  -B: send broadcast when finished (requires -o)\n"
-          "  -P: send broadcast when started and update system properties on "
-          "progress (requires -o and -B)\n"
-          "  -R: take bugreport in remote mode (requires -o, -z, -d and -B, "
-          "shouldn't be used with -P)\n"
-          "  -V: sets the bugreport format version (valid values: %s)\n",
-          VERSION_DEFAULT.c_str());
+static void ShowUsageAndExit(int exitCode = 1) {
+    fprintf(stderr,
+            "usage: dumpstate [-h] [-b soundfile] [-e soundfile] [-o file] [-d] [-p] "
+            "[-z]] [-s] [-S] [-q] [-B] [-P] [-R] [-V version]\n"
+            "  -h: display this help message\n"
+            "  -b: play sound file instead of vibrate, at beginning of job\n"
+            "  -e: play sound file instead of vibrate, at end of job\n"
+            "  -o: write to file (instead of stdout)\n"
+            "  -d: append date to filename (requires -o)\n"
+            "  -p: capture screenshot to filename.png (requires -o)\n"
+            "  -z: generate zipped file (requires -o)\n"
+            "  -s: write output to control socket (for init)\n"
+            "  -S: write file location to control socket (for init; requires -o and -z)"
+            "  -q: disable vibrate\n"
+            "  -B: send broadcast when finished (requires -o)\n"
+            "  -P: send broadcast when started and update system properties on "
+            "progress (requires -o and -B)\n"
+            "  -R: take bugreport in remote mode (requires -o, -z, -d and -B, "
+            "shouldn't be used with -P)\n"
+            "  -v: prints the dumpstate header and exit\n");
+    exit(exitCode);
+}
+
+static void ExitOnInvalidArgs() {
+    fprintf(stderr, "invalid combination of args\n");
+    ShowUsageAndExit();
 }
 
 static void wake_lock_releaser() {
@@ -1079,7 +1081,7 @@
     }
 }
 
-static void sig_handler(int signo) {
+static void sig_handler(int signo __attribute__((unused))) {
     wake_lock_releaser();
     _exit(EXIT_FAILURE);
 }
@@ -1096,33 +1098,52 @@
     sigaction(SIGQUIT, &sa, NULL); // quit
 }
 
-/* adds the temporary report to the existing .zip file, closes the .zip file, and removes the
-   temporary file.
- */
-static bool finish_zip_file(const std::string& bugreport_name, const std::string& bugreport_path,
-        time_t now) {
-    if (!add_zip_entry(bugreport_name, bugreport_path)) {
+bool Dumpstate::FinishZipFile() {
+    std::string entry_name = base_name_ + "-" + name_ + ".txt";
+    MYLOGD("Adding main entry (%s) from %s to .zip bugreport\n", entry_name.c_str(),
+           tmp_path_.c_str());
+    // Final timestamp
+    char date[80];
+    time_t the_real_now_please_stand_up = time(nullptr);
+    strftime(date, sizeof(date), "%Y/%m/%d %H:%M:%S", localtime(&the_real_now_please_stand_up));
+    MYLOGD("dumpstate id %lu finished around %s (%ld s)\n", ds.id_, date,
+           the_real_now_please_stand_up - ds.now_);
+
+    if (!ds.AddZipEntry(entry_name, tmp_path_)) {
         MYLOGE("Failed to add text entry to .zip file\n");
         return false;
     }
-    if (!add_text_zip_entry("main_entry.txt", bugreport_name)) {
+    if (!AddTextZipEntry("main_entry.txt", entry_name)) {
         MYLOGE("Failed to add main_entry.txt to .zip file\n");
         return false;
     }
 
+    // Add log file (which contains stderr output) to zip...
+    fprintf(stderr, "dumpstate_log.txt entry on zip file logged up to here\n");
+    if (!ds.AddZipEntry("dumpstate_log.txt", ds.log_path_.c_str())) {
+        MYLOGE("Failed to add dumpstate log to .zip file\n");
+        return false;
+    }
+    // ... and re-opens it for further logging.
+    redirect_to_existing_file(stderr, const_cast<char*>(ds.log_path_.c_str()));
+    fprintf(stderr, "\n");
+
     int32_t err = zip_writer->Finish();
-    if (err) {
+    if (err != 0) {
         MYLOGE("zip_writer->Finish(): %s\n", ZipWriter::ErrorCodeString(err));
         return false;
     }
 
-    if (is_user_build()) {
-        MYLOGD("Removing temporary file %s\n", bugreport_path.c_str())
-        if (remove(bugreport_path.c_str())) {
-            ALOGW("remove(%s): %s\n", bugreport_path.c_str(), strerror(errno));
+    // TODO: remove once FinishZipFile() is automatically handled by Dumpstate's destructor.
+    ds.zip_file.reset(nullptr);
+
+    if (IsUserBuild()) {
+        MYLOGD("Removing temporary file %s\n", tmp_path_.c_str())
+        if (remove(tmp_path_.c_str()) != 0) {
+            ALOGW("remove(%s): %s\n", tmp_path_.c_str(), strerror(errno));
         }
     } else {
-        MYLOGD("Keeping temporary file %s on non-user build\n", bugreport_path.c_str())
+        MYLOGD("Keeping temporary file %s on non-user build\n", tmp_path_.c_str())
     }
 
     return true;
@@ -1172,34 +1193,13 @@
     int use_control_socket = 0;
     int do_fb = 0;
     int do_broadcast = 0;
-    int do_early_screenshot = 0;
     int is_remote_mode = 0;
-    std::string version = VERSION_DEFAULT;
-
-    now = time(NULL);
-
-    MYLOGI("begin\n");
-
-    if (acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_NAME) < 0) {
-        MYLOGE("Failed to acquire wake lock: %s \n", strerror(errno));
-    } else {
-        MYLOGD("Wake lock acquired.\n");
-        atexit(wake_lock_releaser);
-        register_sig_handler();
-    }
-
-    /* gets the sequential id */
-    char last_id[PROPERTY_VALUE_MAX];
-    property_get("dumpstate.last_id", last_id, "0");
-    id = strtoul(last_id, NULL, 10) + 1;
-    snprintf(last_id, sizeof(last_id), "%lu", id);
-    property_set("dumpstate.last_id", last_id);
-    MYLOGI("dumpstate id: %lu\n", id);
+    bool show_header_only = false;
 
     /* set as high priority, and protect from OOM killer */
     setpriority(PRIO_PROCESS, 0, -20);
 
-    FILE *oom_adj = fopen("/proc/self/oom_score_adj", "we");
+    FILE* oom_adj = fopen("/proc/self/oom_score_adj", "we");
     if (oom_adj) {
         fputs("-1000", oom_adj);
         fclose(oom_adj);
@@ -1213,59 +1213,116 @@
     }
 
     /* parse arguments */
-    std::string args;
-    format_args(argc, const_cast<const char **>(argv), &args);
-    MYLOGD("Dumpstate command line: %s\n", args.c_str());
     int c;
     while ((c = getopt(argc, argv, "dho:svqzpPBRSV:")) != -1) {
         switch (c) {
-            case 'd': do_add_date = 1;          break;
-            case 'z': do_zip_file = 1;          break;
-            case 'o': use_outfile = optarg;     break;
-            case 's': use_socket = 1;           break;
-            case 'S': use_control_socket = 1;   break;
-            case 'v': break;  // compatibility no-op
-            case 'q': do_vibrate = 0;           break;
-            case 'p': do_fb = 1;                break;
-            case 'P': do_update_progress = 1;   break;
-            case 'R': is_remote_mode = 1;       break;
-            case 'B': do_broadcast = 1;         break;
-            case 'V': version = optarg;         break;
-            case '?': printf("\n");
+            // clang-format off
+            case 'd': do_add_date = 1;            break;
+            case 'z': do_zip_file = 1;            break;
+            case 'o': use_outfile = optarg;       break;
+            case 's': use_socket = 1;             break;
+            case 'S': use_control_socket = 1;     break;
+            case 'v': show_header_only = true;    break;
+            case 'q': do_vibrate = 0;             break;
+            case 'p': do_fb = 1;                  break;
+            case 'P': ds.update_progress_ = true; break;
+            case 'R': is_remote_mode = 1;         break;
+            case 'B': do_broadcast = 1;           break;
+            case 'V':                             break; // compatibility no-op
             case 'h':
-                usage();
-                exit(1);
+                ShowUsageAndExit(0);
+                break;
+            default:
+                fprintf(stderr, "Invalid option: %c\n", c);
+                ShowUsageAndExit();
+                // clang-format on
         }
     }
 
-    if ((do_zip_file || do_add_date || do_update_progress || do_broadcast) && !use_outfile) {
-        usage();
-        exit(1);
+    // TODO: use helper function to convert argv into a string
+    for (int i = 0; i < argc; i++) {
+        ds.args_ += argv[i];
+        if (i < argc - 1) {
+            ds.args_ += " ";
+        }
+    }
+
+    ds.extra_options_ = android::base::GetProperty(PROPERTY_EXTRA_OPTIONS, "");
+    if (!ds.extra_options_.empty()) {
+        // Framework uses a system property to override some command-line args.
+        // Currently, it contains the type of the requested bugreport.
+        if (ds.extra_options_ == "bugreportplus") {
+            ds.update_progress_ = true;
+            do_fb = 0;
+        } else if (ds.extra_options_ == "bugreportremote") {
+            do_vibrate = 0;
+            is_remote_mode = 1;
+            do_fb = 0;
+        } else if (ds.extra_options_ == "bugreportwear") {
+            ds.update_progress_ = true;
+        } else {
+            MYLOGE("Unknown extra option: %s\n", ds.extra_options_.c_str());
+        }
+        // Reset the property
+        android::base::SetProperty(PROPERTY_EXTRA_OPTIONS, "");
+    }
+
+    if ((do_zip_file || do_add_date || ds.update_progress_ || do_broadcast) && !use_outfile) {
+        ExitOnInvalidArgs();
     }
 
     if (use_control_socket && !do_zip_file) {
-        usage();
+        ExitOnInvalidArgs();
+    }
+
+    if (ds.update_progress_ && !do_broadcast) {
+        ExitOnInvalidArgs();
+    }
+
+    if (is_remote_mode && (ds.update_progress_ || !do_broadcast || !do_zip_file || !do_add_date)) {
+        ExitOnInvalidArgs();
+    }
+
+    if (ds.version_ == VERSION_DEFAULT) {
+        ds.version_ = VERSION_CURRENT;
+    }
+
+    if (ds.version_ != VERSION_CURRENT) {
+        MYLOGE("invalid version requested ('%s'); suppported values are: ('%s', '%s')\n",
+               ds.version_.c_str(), VERSION_DEFAULT.c_str(), VERSION_CURRENT.c_str());
         exit(1);
     }
 
-    if (do_update_progress && !do_broadcast) {
-        usage();
-        exit(1);
+    if (show_header_only) {
+        ds.PrintHeader();
+        exit(0);
     }
 
-    if (is_remote_mode && (do_update_progress || !do_broadcast || !do_zip_file || !do_add_date)) {
-        usage();
-        exit(1);
+    /* gets the sequential id */
+    int last_id = android::base::GetIntProperty(PROPERTY_LAST_ID, 0);
+    ds.id_ = ++last_id;
+    android::base::SetProperty(PROPERTY_LAST_ID, std::to_string(last_id));
+
+    MYLOGI("begin\n");
+
+    if (acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_NAME) < 0) {
+        MYLOGE("Failed to acquire wake lock: %s \n", strerror(errno));
+    } else {
+        MYLOGD("Wake lock acquired.\n");
+        atexit(wake_lock_releaser);
+        register_sig_handler();
     }
 
-    if (version != VERSION_DEFAULT) {
-      usage();
-      exit(1);
+    if (ds.IsDryRun()) {
+        MYLOGI("Running on dry-run mode (to disable it, call 'setprop dumpstate.dry_run false')\n");
     }
 
-    MYLOGI("bugreport format version: %s\n", version.c_str());
+    MYLOGI("dumpstate info: id=%lu, args='%s', extra_options= %s)\n", ds.id_, ds.args_.c_str(),
+           ds.extra_options_.c_str());
 
-    do_early_screenshot = do_update_progress;
+    MYLOGI("bugreport format version: %s\n", ds.version_.c_str());
+
+    ds.do_early_screenshot_ = ds.update_progress_;
 
     // If we are going to use a socket, do it as early as possible
     // to avoid timeouts from bugreport.
@@ -1275,87 +1332,62 @@
 
     if (use_control_socket) {
         MYLOGD("Opening control socket\n");
-        control_socket_fd = open_socket("dumpstate");
-        do_update_progress = 1;
+        ds.control_socket_fd_ = open_socket("dumpstate");
+        ds.update_progress_ = 1;
     }
 
-    /* full path of the temporary file containing the bugreport */
-    std::string tmp_path;
-
-    /* full path of the file containing the dumpstate logs*/
-    std::string log_path;
-
-    /* full path of the systrace file, when enabled */
-    std::string systrace_path;
-
-    /* full path of the temporary file containing the screenshot (when requested) */
-    std::string screenshot_path;
-
-    /* base name (without suffix or extensions) of the bugreport files */
-    std::string base_name;
-
-    /* pointer to the actual path, be it zip or text */
-    std::string path;
-
-    /* pointer to the zipped file */
-    std::unique_ptr<FILE, int(*)(FILE*)> zip_file(NULL, fclose);
-
     /* redirect output if needed */
     bool is_redirecting = !use_socket && use_outfile;
 
     if (is_redirecting) {
-        bugreport_dir = dirname(use_outfile);
-        base_name = basename(use_outfile);
+        ds.bugreport_dir_ = dirname(use_outfile);
+        ds.base_name_ = basename(use_outfile);
         if (do_add_date) {
             char date[80];
-            strftime(date, sizeof(date), "%Y-%m-%d-%H-%M-%S", localtime(&now));
-            suffix = date;
+            strftime(date, sizeof(date), "%Y-%m-%d-%H-%M-%S", localtime(&ds.now_));
+            ds.name_ = date;
         } else {
-            suffix = "undated";
+            ds.name_ = "undated";
         }
-        char build_id[PROPERTY_VALUE_MAX];
-        property_get("ro.build.id", build_id, "UNKNOWN_BUILD");
-        base_name = base_name + "-" + build_id;
+        std::string buildId = android::base::GetProperty("ro.build.id", "UNKNOWN_BUILD");
+        ds.base_name_ += "-" + buildId;
         if (do_fb) {
-            // TODO: if dumpstate was an object, the paths could be internal variables and then
-            // we could have a function to calculate the derived values, such as:
-            //     screenshot_path = GetPath(".png");
-            screenshot_path = bugreport_dir + "/" + base_name + "-" + suffix + ".png";
+            ds.screenshot_path_ = ds.GetPath(".png");
         }
-        tmp_path = bugreport_dir + "/" + base_name + "-" + suffix + ".tmp";
-        log_path = bugreport_dir + "/dumpstate_log-" + suffix + "-"
-                + std::to_string(getpid()) + ".txt";
+        ds.tmp_path_ = ds.GetPath(".tmp");
+        ds.log_path_ = ds.GetPath("-dumpstate_log-" + std::to_string(getpid()) + ".txt");
 
-        MYLOGD("Bugreport dir: %s\n"
-                "Base name: %s\n"
-                "Suffix: %s\n"
-                "Log path: %s\n"
-                "Temporary path: %s\n"
-                "Screenshot path: %s\n",
-                bugreport_dir.c_str(), base_name.c_str(), suffix.c_str(),
-                log_path.c_str(), tmp_path.c_str(), screenshot_path.c_str());
+        MYLOGD(
+            "Bugreport dir: %s\n"
+            "Base name: %s\n"
+            "Suffix: %s\n"
+            "Log path: %s\n"
+            "Temporary path: %s\n"
+            "Screenshot path: %s\n",
+            ds.bugreport_dir_.c_str(), ds.base_name_.c_str(), ds.name_.c_str(),
+            ds.log_path_.c_str(), ds.tmp_path_.c_str(), ds.screenshot_path_.c_str());
 
         if (do_zip_file) {
-            path = bugreport_dir + "/" + base_name + "-" + suffix + ".zip";
-            MYLOGD("Creating initial .zip file (%s)\n", path.c_str());
-            create_parent_dirs(path.c_str());
-            zip_file.reset(fopen(path.c_str(), "wb"));
-            if (!zip_file) {
-                MYLOGE("fopen(%s, 'wb'): %s\n", path.c_str(), strerror(errno));
+            ds.path_ = ds.GetPath(".zip");
+            MYLOGD("Creating initial .zip file (%s)\n", ds.path_.c_str());
+            create_parent_dirs(ds.path_.c_str());
+            ds.zip_file.reset(fopen(ds.path_.c_str(), "wb"));
+            if (ds.zip_file == nullptr) {
+                MYLOGE("fopen(%s, 'wb'): %s\n", ds.path_.c_str(), strerror(errno));
                 do_zip_file = 0;
             } else {
-                zip_writer.reset(new ZipWriter(zip_file.get()));
+                zip_writer.reset(new ZipWriter(ds.zip_file.get()));
             }
-            add_text_zip_entry("version.txt", version);
+            ds.AddTextZipEntry("version.txt", ds.version_);
         }
 
-        if (do_update_progress) {
+        if (ds.update_progress_) {
             if (do_broadcast) {
                 // clang-format off
                 std::vector<std::string> am_args = {
                      "--receiver-permission", "android.permission.DUMP", "--receiver-foreground",
-                     "--es", "android.intent.extra.NAME", suffix,
-                     "--ei", "android.intent.extra.ID", std::to_string(id),
+                     "--es", "android.intent.extra.NAME", ds.name_,
+                     "--ei", "android.intent.extra.ID", std::to_string(ds.id_),
                      "--ei", "android.intent.extra.PID", std::to_string(getpid()),
                      "--ei", "android.intent.extra.MAX", std::to_string(WEIGHT_TOTAL),
                 };
@@ -1363,7 +1395,7 @@
                 send_broadcast("android.intent.action.BUGREPORT_STARTED", am_args);
             }
             if (use_control_socket) {
-                dprintf(control_socket_fd, "BEGIN:%s\n", path.c_str());
+                dprintf(ds.control_socket_fd_, "BEGIN:%s\n", ds.path_.c_str());
             }
         }
     }
@@ -1384,46 +1416,42 @@
         }
     }
 
-    if (do_fb && do_early_screenshot) {
-        if (screenshot_path.empty()) {
+    if (do_fb && ds.do_early_screenshot_) {
+        if (ds.screenshot_path_.empty()) {
             // should not have happened
             MYLOGE("INTERNAL ERROR: skipping early screenshot because path was not set\n");
         } else {
             MYLOGI("taking early screenshot\n");
-            take_screenshot(screenshot_path);
-            MYLOGI("wrote screenshot: %s\n", screenshot_path.c_str());
-            if (chown(screenshot_path.c_str(), AID_SHELL, AID_SHELL)) {
-                MYLOGE("Unable to change ownership of screenshot file %s: %s\n",
-                        screenshot_path.c_str(), strerror(errno));
-            }
+            ds.TakeScreenshot();
         }
     }
 
     if (do_zip_file) {
-        if (chown(path.c_str(), AID_SHELL, AID_SHELL)) {
-            MYLOGE("Unable to change ownership of zip file %s: %s\n", path.c_str(), strerror(errno));
+        if (chown(ds.path_.c_str(), AID_SHELL, AID_SHELL)) {
+            MYLOGE("Unable to change ownership of zip file %s: %s\n", ds.path_.c_str(),
+                   strerror(errno));
         }
     }
 
     if (is_redirecting) {
-        redirect_to_file(stderr, const_cast<char*>(log_path.c_str()));
-        if (chown(log_path.c_str(), AID_SHELL, AID_SHELL)) {
+        redirect_to_file(stderr, const_cast<char*>(ds.log_path_.c_str()));
+        if (chown(ds.log_path_.c_str(), AID_SHELL, AID_SHELL)) {
             MYLOGE("Unable to change ownership of dumpstate log file %s: %s\n",
-                    log_path.c_str(), strerror(errno));
+                   ds.log_path_.c_str(), strerror(errno));
         }
         /* TODO: rather than generating a text file now and zipping it later,
            it would be more efficient to redirect stdout to the zip entry
            directly, but the libziparchive doesn't support that option yet. */
-        redirect_to_file(stdout, const_cast<char*>(tmp_path.c_str()));
-        if (chown(tmp_path.c_str(), AID_SHELL, AID_SHELL)) {
+        redirect_to_file(stdout, const_cast<char*>(ds.tmp_path_.c_str()));
+        if (chown(ds.tmp_path_.c_str(), AID_SHELL, AID_SHELL)) {
             MYLOGE("Unable to change ownership of temporary bugreport file %s: %s\n",
-                    tmp_path.c_str(), strerror(errno));
+                   ds.tmp_path_.c_str(), strerror(errno));
         }
     }
     // NOTE: there should be no stdout output until now, otherwise it would break the header.
     // In particular, DurationReport objects should be created passing 'title, NULL', so their
     // duration is logged into MYLOG instead.
-    print_header(version);
+    ds.PrintHeader();
 
     // Dumps systrace right away, otherwise it will be filled with unnecessary events.
     // First try to dump anrd trace if the daemon is running. Otherwise, dump
@@ -1432,40 +1460,43 @@
         dump_systrace();
     }
 
-    // TODO: Drop root user and move into dumpstate() once b/28633932 is fixed.
-    dump_raft();
-
     // Invoking the following dumpsys calls before dump_traces() to try and
     // keep the system stats as close to its initial state as possible.
-    run_command_as_shell("DUMPSYS MEMINFO", 30, "dumpsys", "-t", "30", "meminfo", "-a", NULL);
-    run_command_as_shell("DUMPSYS CPUINFO", 10, "dumpsys", "-t", "10", "cpuinfo", "-a", NULL);
+    RunDumpsys("DUMPSYS MEMINFO", {"meminfo", "-a"},
+               CommandOptions::WithTimeout(90).DropRoot().Build());
+    RunDumpsys("DUMPSYS CPUINFO", {"cpuinfo", "-a"},
+               CommandOptions::WithTimeout(10).DropRoot().Build());
+
+    // TODO: Drop root user and move into dumpstate() once b/28633932 is fixed.
+    dump_raft();
 
     /* collect stack traces from Dalvik and native processes (needs root) */
     dump_traces_path = dump_traces();
 
     /* Run some operations that require root. */
     get_tombstone_fds(tombstone_data);
-    add_dir(RECOVERY_DIR, true);
-    add_dir(RECOVERY_DATA_DIR, true);
-    add_dir(LOGPERSIST_DATA_DIR, false);
-    if (!is_user_build()) {
-        add_dir(PROFILE_DATA_DIR_CUR, true);
-        add_dir(PROFILE_DATA_DIR_REF, true);
+    ds.AddDir(RECOVERY_DIR, true);
+    ds.AddDir(RECOVERY_DATA_DIR, true);
+    ds.AddDir(LOGPERSIST_DATA_DIR, false);
+    if (!IsUserBuild()) {
+        ds.AddDir(PROFILE_DATA_DIR_CUR, true);
+        ds.AddDir(PROFILE_DATA_DIR_REF, true);
     }
     add_mountinfo();
     dump_iptables();
 
     // Capture any IPSec policies in play.  No keys are exposed here.
-    run_command("IP XFRM POLICY", 10, "ip", "xfrm", "policy", nullptr);
+    RunCommand("IP XFRM POLICY", {"ip", "xfrm", "policy"},
+               CommandOptions::WithTimeout(10).Build());
 
     // Run ss as root so we can see socket marks.
-    run_command("DETAILED SOCKET STATE", 10, "ss", "-eionptu", NULL);
+    RunCommand("DETAILED SOCKET STATE", {"ss", "-eionptu"}, CommandOptions::WithTimeout(10).Build());
 
     if (!drop_root_user()) {
         return -1;
     }
 
-    dumpstate(do_early_screenshot ? "": screenshot_path, version);
+    dumpstate();
 
     /* close output if needed */
     if (is_redirecting) {
@@ -1476,71 +1507,70 @@
     if (use_outfile) {
 
         /* check if user changed the suffix using system properties */
-        char key[PROPERTY_KEY_MAX];
-        char value[PROPERTY_VALUE_MAX];
-        snprintf(key, sizeof(key), "dumpstate.%d.name", getpid());
-        property_get(key, value, "");
+        std::string name = android::base::GetProperty(
+            android::base::StringPrintf("dumpstate.%d.name", getpid()), "");
         bool change_suffix= false;
-        if (value[0]) {
+        if (!name.empty()) {
             /* must whitelist which characters are allowed, otherwise it could cross directories */
             std::regex valid_regex("^[-_a-zA-Z0-9]+$");
-            if (std::regex_match(value, valid_regex)) {
+            if (std::regex_match(name.c_str(), valid_regex)) {
                 change_suffix = true;
             } else {
-                MYLOGE("invalid suffix provided by user: %s\n", value);
+                MYLOGE("invalid suffix provided by user: %s\n", name.c_str());
             }
         }
         if (change_suffix) {
-            MYLOGI("changing suffix from %s to %s\n", suffix.c_str(), value);
-            suffix = value;
-            if (!screenshot_path.empty()) {
-                std::string new_screenshot_path =
-                        bugreport_dir + "/" + base_name + "-" + suffix + ".png";
-                if (rename(screenshot_path.c_str(), new_screenshot_path.c_str())) {
-                    MYLOGE("rename(%s, %s): %s\n", screenshot_path.c_str(),
-                            new_screenshot_path.c_str(), strerror(errno));
+            MYLOGI("changing suffix from %s to %s\n", ds.name_.c_str(), name.c_str());
+            ds.name_ = name;
+            if (!ds.screenshot_path_.empty()) {
+                std::string new_screenshot_path = ds.GetPath(".png");
+                if (rename(ds.screenshot_path_.c_str(), new_screenshot_path.c_str())) {
+                    MYLOGE("rename(%s, %s): %s\n", ds.screenshot_path_.c_str(),
+                           new_screenshot_path.c_str(), strerror(errno));
                 } else {
-                    screenshot_path = new_screenshot_path;
+                    ds.screenshot_path_ = new_screenshot_path;
                 }
             }
         }
 
         bool do_text_file = true;
         if (do_zip_file) {
-            std::string entry_name = base_name + "-" + suffix + ".txt";
-            MYLOGD("Adding main entry (%s) to .zip bugreport\n", entry_name.c_str());
-            if (!finish_zip_file(entry_name, tmp_path, now)) {
+            if (!ds.FinishZipFile()) {
                 MYLOGE("Failed to finish zip file; sending text bugreport instead\n");
                 do_text_file = true;
             } else {
                 do_text_file = false;
                 // Since zip file is already created, it needs to be renamed.
-                std::string new_path = bugreport_dir + "/" + base_name + "-" + suffix + ".zip";
-                if (path != new_path) {
-                    MYLOGD("Renaming zip file from %s to %s\n", path.c_str(), new_path.c_str());
-                    if (rename(path.c_str(), new_path.c_str())) {
-                        MYLOGE("rename(%s, %s): %s\n", path.c_str(),
-                                new_path.c_str(), strerror(errno));
+                std::string new_path = ds.GetPath(".zip");
+                if (ds.path_ != new_path) {
+                    MYLOGD("Renaming zip file from %s to %s\n", ds.path_.c_str(), new_path.c_str());
+                    if (rename(ds.path_.c_str(), new_path.c_str())) {
+                        MYLOGE("rename(%s, %s): %s\n", ds.path_.c_str(), new_path.c_str(),
+                               strerror(errno));
                     } else {
-                        path = new_path;
+                        ds.path_ = new_path;
                     }
                 }
             }
         }
         if (do_text_file) {
-            path = bugreport_dir + "/" + base_name + "-" + suffix + ".txt";
-            MYLOGD("Generating .txt bugreport at %s from %s\n", path.c_str(), tmp_path.c_str());
-            if (rename(tmp_path.c_str(), path.c_str())) {
-                MYLOGE("rename(%s, %s): %s\n", tmp_path.c_str(), path.c_str(), strerror(errno));
-                path.clear();
+            ds.path_ = ds.GetPath(".txt");
+            MYLOGD("Generating .txt bugreport at %s from %s\n", ds.path_.c_str(),
+                   ds.tmp_path_.c_str());
+            if (rename(ds.tmp_path_.c_str(), ds.path_.c_str())) {
+                MYLOGE("rename(%s, %s): %s\n", ds.tmp_path_.c_str(), ds.path_.c_str(),
+                       strerror(errno));
+                ds.path_.clear();
             }
         }
         if (use_control_socket) {
             if (do_text_file) {
-                dprintf(control_socket_fd, "FAIL:could not create zip file, check %s "
-                        "for more details\n", log_path.c_str());
+                dprintf(ds.control_socket_fd_,
+                        "FAIL:could not create zip file, check %s "
+                        "for more details\n",
+                        ds.log_path_.c_str());
             } else {
-                dprintf(control_socket_fd, "OK:%s\n", path.c_str());
+                dprintf(ds.control_socket_fd_, "OK:%s\n", ds.path_.c_str());
             }
         }
     }
@@ -1555,27 +1585,27 @@
 
     /* tell activity manager we're done */
     if (do_broadcast) {
-        if (!path.empty()) {
-            MYLOGI("Final bugreport path: %s\n", path.c_str());
+        if (!ds.path_.empty()) {
+            MYLOGI("Final bugreport path: %s\n", ds.path_.c_str());
             // clang-format off
             std::vector<std::string> am_args = {
                  "--receiver-permission", "android.permission.DUMP", "--receiver-foreground",
-                 "--ei", "android.intent.extra.ID", std::to_string(id),
+                 "--ei", "android.intent.extra.ID", std::to_string(ds.id_),
                  "--ei", "android.intent.extra.PID", std::to_string(getpid()),
-                 "--ei", "android.intent.extra.MAX", std::to_string(weight_total),
-                 "--es", "android.intent.extra.BUGREPORT", path,
-                 "--es", "android.intent.extra.DUMPSTATE_LOG", log_path
+                 "--ei", "android.intent.extra.MAX", std::to_string(ds.weight_total_),
+                 "--es", "android.intent.extra.BUGREPORT", ds.path_,
+                 "--es", "android.intent.extra.DUMPSTATE_LOG", ds.log_path_
             };
             // clang-format on
             if (do_fb) {
                 am_args.push_back("--es");
                 am_args.push_back("android.intent.extra.SCREENSHOT");
-                am_args.push_back(screenshot_path);
+                am_args.push_back(ds.screenshot_path_);
             }
             if (is_remote_mode) {
                 am_args.push_back("--es");
                 am_args.push_back("android.intent.extra.REMOTE_BUGREPORT_HASH");
-                am_args.push_back(SHA256_file_hash(path));
+                am_args.push_back(SHA256_file_hash(ds.path_));
                 send_broadcast("android.intent.action.REMOTE_BUGREPORT_FINISHED", am_args);
             } else {
                 send_broadcast("android.intent.action.BUGREPORT_FINISHED", am_args);
@@ -1585,16 +1615,16 @@
         }
     }
 
-    MYLOGD("Final progress: %d/%d (originally %d)\n", progress, weight_total, WEIGHT_TOTAL);
-    MYLOGI("done\n");
+    MYLOGD("Final progress: %d/%d (originally %d)\n", ds.progress_, ds.weight_total_, WEIGHT_TOTAL);
+    MYLOGI("done (id %lu)\n", ds.id_);
 
     if (is_redirecting) {
         fclose(stderr);
     }
 
-    if (use_control_socket && control_socket_fd != -1) {
-      MYLOGD("Closing control socket\n");
-      close(control_socket_fd);
+    if (use_control_socket && ds.control_socket_fd_ != -1) {
+        MYLOGD("Closing control socket\n");
+        close(ds.control_socket_fd_);
     }
 
     return 0;
diff --git a/cmds/dumpstate/dumpstate.h b/cmds/dumpstate/dumpstate.h
index 1b28c49..568256a 100644
--- a/cmds/dumpstate/dumpstate.h
+++ b/cmds/dumpstate/dumpstate.h
@@ -14,20 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef _DUMPSTATE_H_
-#define _DUMPSTATE_H_
-
-/* When defined, skips the real dumps and just print the section headers.
-   Useful when debugging dumpstate itself. */
-//#define _DUMPSTATE_DRY_RUN_
-
-#ifdef _DUMPSTATE_DRY_RUN_
-#define ON_DRY_RUN_RETURN(X) return X
-#define ON_DRY_RUN(code) code
-#else
-#define ON_DRY_RUN_RETURN(X)
-#define ON_DRY_RUN(code)
-#endif
+#ifndef FRAMEWORK_NATIVE_CMD_DUMPSTATE_H_
+#define FRAMEWORK_NATIVE_CMD_DUMPSTATE_H_
 
 #ifndef MYLOGD
 #define MYLOGD(...) fprintf(stderr, __VA_ARGS__); ALOGD(__VA_ARGS__);
@@ -45,18 +33,151 @@
 #include <unistd.h>
 #include <stdbool.h>
 #include <stdio.h>
+
+#include <string>
 #include <vector>
 
-#define SU_PATH "/system/xbin/su"
+// Workaround for const char *args[MAX_ARGS_ARRAY_SIZE] variables until they're converted to
+// std::vector<std::string>
+// TODO: remove once not used
+#define MAX_ARGS_ARRAY_SIZE 1000
 
+// TODO: remove once moved to HAL
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-typedef void (for_each_pid_func)(int, const char *);
-typedef void (for_each_tid_func)(int, int, const char *);
+/*
+ * Defines the Linux user that should be executing a command.
+ */
+enum RootMode {
+    /* Explicitly change the `uid` and `gid` to be `shell`.*/
+    DROP_ROOT,
+    /* Don't change the `uid` and `gid`. */
+    DONT_DROP_ROOT,
+    /* Prefix the command with `/PATH/TO/su root`. Won't work non user builds. */
+    SU_ROOT
+};
 
-/* Estimated total weight of bugreport generation.
+/*
+ * Defines what should happen with the `stdout` stream of a command.
+ */
+enum StdoutMode {
+    /* Don't change `stdout`. */
+    NORMAL_STDOUT,
+    /* Redirect `stdout` to `stderr`. */
+    REDIRECT_TO_STDERR
+};
+
+/*
+ * Helper class used to report how long it takes for a section to finish.
+ *
+ * Typical usage:
+ *
+ *    DurationReporter duration_reporter(title);
+ *
+ */
+class DurationReporter {
+  public:
+    DurationReporter(const std::string& title);
+    DurationReporter(const std::string& title, FILE* out);
+
+    ~DurationReporter();
+
+    static uint64_t Nanotime();
+
+  private:
+    // TODO: use std::string for title, once dump_files() and other places that pass a char* are
+    // refactored as well.
+    std::string title_;
+    FILE* out_;
+    uint64_t started_;
+};
+
+/*
+ * Value object used to set command options.
+ *
+ * Typically constructed using a builder with chained setters. Examples:
+ *
+ *  CommandOptions::WithTimeout(20).AsRoot().Build();
+ *  CommandOptions::WithTimeout(10).Always().RedirectStderr().Build();
+ *
+ * Although the builder could be used to dynamically set values. Example:
+ *
+ *  CommandOptions::CommandOptionsBuilder options =
+ *  CommandOptions::WithTimeout(10);
+ *  if (!is_user_build()) {
+ *    options.AsRoot();
+ *  }
+ *  RunCommand("command", {"args"}, options.Build());
+ */
+class CommandOptions {
+  private:
+    class CommandOptionsValues {
+      private:
+        CommandOptionsValues(long timeout);
+
+        long timeout_;
+        bool always_;
+        RootMode root_mode_;
+        StdoutMode stdout_mode_;
+        std::string logging_message_;
+
+        friend class CommandOptions;
+        friend class CommandOptionsBuilder;
+    };
+
+    CommandOptions(const CommandOptionsValues& values);
+
+    const CommandOptionsValues values;
+
+  public:
+    class CommandOptionsBuilder {
+      public:
+        /* Sets the command to always run, even on `dry-run` mode. */
+        CommandOptionsBuilder& Always();
+        /* Sets the command's RootMode as `SU_ROOT` */
+        CommandOptionsBuilder& AsRoot();
+        /* Sets the command's RootMode as `DROP_ROOT` */
+        CommandOptionsBuilder& DropRoot();
+        /* Sets the command's StdoutMode `REDIRECT_TO_STDERR` */
+        CommandOptionsBuilder& RedirectStderr();
+        /* When not empty, logs a message before executing the command.
+         * Must contain a `%s`, which will be replaced by the full command line, and end on `\n`. */
+        CommandOptionsBuilder& Log(const std::string& message);
+        /* Builds the command options. */
+        CommandOptions Build();
+
+      private:
+        CommandOptionsBuilder(long timeout);
+        CommandOptionsValues values;
+        friend class CommandOptions;
+    };
+
+    /** Gets the command timeout, in seconds. */
+    long Timeout() const;
+    /* Checks whether the command should always be run, even on dry-run mode. */
+    bool Always() const;
+    /** Gets the RootMode of the command. */
+    RootMode RootMode() const;
+    /** Gets the StdoutMode of the command. */
+    StdoutMode StdoutMode() const;
+    /** Gets the logging message header, it any. */
+    std::string LoggingMessage() const;
+
+    /** Creates a builder with the requied timeout. */
+    static CommandOptionsBuilder WithTimeout(long timeout);
+
+    // Common options.
+    static CommandOptions DEFAULT;
+    static CommandOptions DEFAULT_DUMPSYS;
+    static CommandOptions AS_ROOT_5;
+    static CommandOptions AS_ROOT_10;
+    static CommandOptions AS_ROOT_20;
+};
+
+/*
+ * Estimated total weight of bugreport generation.
  *
  * Each section contributes to the total weight by an individual weight, so the overall progress
  * can be calculated by dividing the all completed weight by the total weight.
@@ -68,39 +189,214 @@
  * example, jumping from 70% to 100%), while a value too low will cause the progress to get stuck
  * at an almost-finished value (like 99%) for a while.
  */
+// TODO: move to dumpstate.cpp / utils.cpp once it's used in just one file
 static const int WEIGHT_TOTAL = 6500;
 
-/* Most simple commands have 10 as timeout, so 5 is a good estimate */
-static const int WEIGHT_FILE = 5;
+/*
+ * List of supported zip format versions.
+ *
+ * See bugreport-format.md for more info.
+ */
+static std::string VERSION_CURRENT = "1.0";
 
 /*
- * TODO: the dumpstate internal state is getting fragile; for example, this variable is defined
- * here, declared at utils.cpp, and used on utils.cpp and dumpstate.cpp.
- * It would be better to take advantage of the C++ migration and encapsulate the state in an object,
- * but that will be better handled in a major C++ refactoring, which would also get rid of other C
- * idioms (like using std::string instead of char*, removing varargs, etc...) */
-extern int do_update_progress, progress, weight_total, control_socket_fd;
+ * "Alias" for the current version.
+ */
+static std::string VERSION_DEFAULT = "default";
 
-/* full path of the directory where the bugreport files will be written */
-extern std::string bugreport_dir;
+/*
+ * Main class driving a bugreport generation.
+ *
+ * Currently, it only contains variables that are accessed externally, but gradually the functions
+ * that are spread accross utils.cpp and dumpstate.cpp will be moved to it.
+ */
+class Dumpstate {
+    friend class DumpstateTest;
 
-/* root dir for all files copied as-is into the bugreport. */
-extern const std::string ZIP_ROOT_DIR;
+  public:
+    static Dumpstate& GetInstance();
 
-/* Checkes whether dumpstate is generating a zipped bugreport. */
-bool is_zipping();
+    /*
+     * When running in dry-run mode, skips the real dumps and just print the section headers.
+     *
+     * Useful when debugging dumpstate or other bugreport-related activities.
+     *
+     * Dry-run mode is enabled by setting the system property dumpstate.dry_run to true.
+     */
+    bool IsDryRun() const;
 
-/* adds a new entry to the existing zip file. */
-bool add_zip_entry(const std::string& entry_name, const std::string& entry_path);
+    /*
+     * Gets whether device is running a `user` build.
+     */
+    bool IsUserBuild() const;
 
-/* adds a new entry to the existing zip file. */
-bool add_zip_entry_from_fd(const std::string& entry_name, int fd);
+    /* Checkes whether dumpstate is generating a zipped bugreport. */
+    bool IsZipping() const;
 
-/* adds all files from a directory to the zipped bugreport file */
-void add_dir(const char *dir, bool recursive);
+    /*
+     * Forks a command, waits for it to finish, and returns its status.
+     *
+     * |title| description of the command printed on `stdout` (or empty to skip
+     * description).
+     * |full_command| array containing the command (first entry) and its arguments.
+     * Must contain at least one element.
+     * |options| optional argument defining the command's behavior.
+     */
+    int RunCommand(const std::string& title, const std::vector<std::string>& fullCommand,
+                   const CommandOptions& options = CommandOptions::DEFAULT);
 
-/* prints the contents of a file */
-int dump_file(const char *title, const char *path);
+    /*
+     * Runs `dumpsys` with the given arguments, automatically setting its timeout
+     * (`-t` argument)
+     * according to the command options.
+     *
+     * |title| description of the command printed on `stdout` (or empty to skip
+     * description).
+     * |dumpsys_args| `dumpsys` arguments (except `-t`).
+     * |options| optional argument defining the command's behavior.
+     * |dumpsys_timeout| when > 0, defines the value passed to `dumpsys -t` (otherwise it uses the
+     * timeout from `options`)
+     */
+    void RunDumpsys(const std::string& title, const std::vector<std::string>& dumpsys_args,
+                    const CommandOptions& options = CommandOptions::DEFAULT_DUMPSYS,
+                    long dumpsys_timeout = 0);
+
+    /*
+     * Prints the contents of a file.
+     *
+     * |title| description of the command printed on `stdout` (or empty to skip
+     * description).
+     * |path| location of the file to be dumped.
+     */
+    int DumpFile(const std::string& title, const std::string& path);
+
+    /*
+     * Adds a new entry to the existing zip file.
+     * */
+    bool AddZipEntry(const std::string& entry_name, const std::string& entry_path);
+
+    /*
+     * Adds a new entry to the existing zip file.
+     */
+    bool AddZipEntryFromFd(const std::string& entry_name, int fd);
+
+    /*
+     * Adds a text entry entry to the existing zip file.
+     */
+    bool AddTextZipEntry(const std::string& entry_name, const std::string& content);
+
+    /*
+     * Adds all files from a directory to the zipped bugreport file.
+     */
+    void AddDir(const std::string& dir, bool recursive);
+
+    /*
+     * Takes a screenshot and save it to the given `path`.
+     *
+     * If `path` is empty, uses a standard path based on the bugreport name.
+     */
+    void TakeScreenshot(const std::string& path = "");
+
+    // TODO: members below should be private once refactor is finished
+
+    /*
+     * Updates the overall progress of the bugreport generation by the given weight increment.
+     */
+    void UpdateProgress(int delta);
+
+    /* Prints the dumpstate header on `stdout`. */
+    void PrintHeader() const;
+
+    /*
+     * Adds the temporary report to the existing .zip file, closes the .zip file, and removes the
+     * temporary file.
+     */
+    bool FinishZipFile();
+
+    /* Gets the path of a bugreport file with the given suffix. */
+    std::string GetPath(const std::string& suffix) const;
+
+    // TODO: initialize fields on constructor
+
+    // dumpstate id - unique after each device reboot.
+    unsigned long id_;
+
+    // Whether progress updates should be published.
+    bool update_progress_ = false;
+
+    // Whether it should take an screenshot earlier in the process.
+    bool do_early_screenshot_ = false;
+
+    // Currrent progress.
+    int progress_ = 0;
+
+    // Total estimated progress.
+    int weight_total_ = WEIGHT_TOTAL;
+
+    // When set, defines a socket file-descriptor use to report progress to bugreportz.
+    int control_socket_fd_ = -1;
+
+    // Bugreport format version;
+    std::string version_ = VERSION_CURRENT;
+
+    // Command-line arguments as string
+    std::string args_;
+
+    // Extra options passed as system property.
+    std::string extra_options_;
+
+    // Full path of the directory where the bugreport files will be written.
+    std::string bugreport_dir_;
+
+    // Full path of the temporary file containing the screenshot (when requested).
+    std::string screenshot_path_;
+
+    time_t now_;
+
+    // Base name (without suffix or extensions) of the bugreport files, typically
+    // `bugreport-BUILD_ID`.
+    std::string base_name_;
+
+    // Name is the suffix part of the bugreport files - it's typically the date (when invoked with
+    // `-d`), but it could be changed by the user..
+    std::string name_;
+
+    // Full path of the temporary file containing the bugreport.
+    std::string tmp_path_;
+
+    // Full path of the file containing the dumpstate logs.
+    std::string log_path_;
+
+    // Pointer to the actual path, be it zip or text.
+    std::string path_;
+
+    // Pointer to the zipped file.
+    std::unique_ptr<FILE, int (*)(FILE*)> zip_file{nullptr, fclose};
+
+  private:
+    // Used by GetInstance() only.
+    Dumpstate(const std::string& version = VERSION_CURRENT, bool dry_run = false,
+              const std::string& build_type = "user");
+
+    // Internal version of RunCommand that just runs it, without updating progress.
+    int JustRunCommand(const char* command, const char* path, std::vector<const char*>& args,
+                       const CommandOptions& options) const;
+
+    // Internal version of RunCommand that just dumps it, without updating progress.
+    int JustDumpFile(const std::string& title, const std::string& path) const;
+
+    // Whether this is a dry run.
+    bool dry_run_;
+
+    // Build type (such as 'user' or 'eng').
+    std::string build_type_;
+};
+
+// for_each_pid_func = void (*)(int, const char*);
+// for_each_tid_func = void (*)(int, int, const char*);
+
+typedef void(for_each_pid_func)(int, const char*);
+typedef void(for_each_tid_func)(int, int, const char*);
 
 /* saves the the contents of a file as a long */
 int read_file_as_long(const char *path, long int *output);
@@ -116,25 +412,8 @@
  * to false when set to NULL. dump_from_fd will always be
  * called with title NULL.
  */
-int dump_files(const char *title, const char *dir,
-        bool (*skip)(const char *path),
-        int (*dump_from_fd)(const char *title, const char *path, int fd));
-
-// TODO: need to refactor all those run_command variations; there shold be just one, receiving an
-// optional CommandOptions objects with values such as run_always, drop_root, etc...
-
-/* forks a command and waits for it to finish -- terminate args with NULL */
-int run_command_as_shell(const char *title, int timeout_seconds, const char *command, ...);
-int run_command(const char *title, int timeout_seconds, const char *command, ...);
-
-enum RootMode { DROP_ROOT, DONT_DROP_ROOT };
-enum StdoutMode { NORMAL_STDOUT, REDIRECT_TO_STDERR };
-
-/* forks a command and waits for it to finish
-   first element of args is the command, and last must be NULL.
-   command is always ran, even when _DUMPSTATE_DRY_RUN_ is defined. */
-int run_command_always(const char *title, RootMode root_mode, StdoutMode stdout_mode,
-        int timeout_seconds, const char *args[]);
+int dump_files(const std::string& title, const char* dir, bool (*skip)(const char* path),
+               int (*dump_from_fd)(const char* title, const char* path, int fd));
 
 /* switch to non-root user and group */
 bool drop_root_user();
@@ -142,9 +421,6 @@
 /* sends a broadcast using Activity Manager */
 void send_broadcast(const std::string& action, const std::vector<std::string>& args);
 
-/* updates the overall progress of dumpstate by the given weight increment */
-void update_progress(int weight);
-
 /* prints all the system properties */
 void print_properties();
 
@@ -154,9 +430,12 @@
 /* redirect output to a service control socket */
 void redirect_to_socket(FILE *redirect, const char *service);
 
-/* redirect output to a file */
+/* redirect output to a new file */
 void redirect_to_file(FILE *redirect, char *path);
 
+/* redirect output to an existing file */
+void redirect_to_existing_file(FILE *redirect, char *path);
+
 /* create leading directories, if necessary */
 void create_parent_dirs(const char *path);
 
@@ -190,9 +469,6 @@
 /* Implemented by libdumpstate_board to dump board-specific info */
 void dumpstate_board();
 
-/* Takes a screenshot and save it to the given file */
-void take_screenshot(const std::string& path);
-
 /* Vibrates for a given durating (in milliseconds). */
 void vibrate(FILE* vibrator, int ms);
 
@@ -211,31 +487,8 @@
 /** Tells if the device is running a user build. */
 bool is_user_build();
 
-/*
- * Helper class used to report how long it takes for a section to finish.
- *
- * Typical usage:
- *
- *    DurationReporter duration_reporter(title);
- *
- */
-class DurationReporter {
-public:
-    explicit DurationReporter(const char *title);
-    DurationReporter(const char *title, FILE* out);
-
-    ~DurationReporter();
-
-    static uint64_t nanotime();
-
-private:
-    const char* title_;
-    FILE* out_;
-    uint64_t started_;
-};
-
 #ifdef __cplusplus
 }
 #endif
 
-#endif /* _DUMPSTATE_H_ */
+#endif /* FRAMEWORK_NATIVE_CMD_DUMPSTATE_H_ */
diff --git a/cmds/dumpstate/dumpstate.rc b/cmds/dumpstate/dumpstate.rc
index 3448e91..2e72574 100644
--- a/cmds/dumpstate/dumpstate.rc
+++ b/cmds/dumpstate/dumpstate.rc
@@ -17,32 +17,3 @@
     class main
     disabled
     oneshot
-
-# bugreportplus is an enhanced version of bugreport that provides a better
-# user interface (like displaying progress and allowing user to enter details).
-# It's typically triggered by the power button or developer settings.
-service bugreportplus /system/bin/dumpstate -d -B -P -z \
-        -o /data/user_de/0/com.android.shell/files/bugreports/bugreport
-    class main
-    disabled
-    oneshot
-
-# bugreportremote is an altered version of bugreport that is supposed to be
-# called not by human user of the device, but by DevicePolicyManagerService only when the
-# Device Owner explicitly requests it, and shared with the Device Policy Controller (DPC) app only
-# if the user consents
-# it will disable vibrations, screenshot taking and will not track progress or
-# allow user to enter any details
-service bugreportremote /system/bin/dumpstate -d -q -B -R -z \
-        -o /data/user_de/0/com.android.shell/files/bugreports/remote/bugreport
-    class main
-    disabled
-    oneshot
-
-# bugreportwear is a wearable version of bugreport that displays progress and takes early
-# screenshot.
-service bugreportwear /system/bin/dumpstate -d -B -P -p -z \
-        -o /data/user_de/0/com.android.shell/files/bugreports/bugreport
-    class main
-    disabled
-    oneshot
diff --git a/cmds/dumpstate/testdata/multiple-lines-with-newline.txt b/cmds/dumpstate/testdata/multiple-lines-with-newline.txt
new file mode 100644
index 0000000..7b7a187
--- /dev/null
+++ b/cmds/dumpstate/testdata/multiple-lines-with-newline.txt
@@ -0,0 +1,3 @@
+I AM LINE1
+I AM LINE2
+I AM LINE3
diff --git a/cmds/dumpstate/testdata/multiple-lines.txt b/cmds/dumpstate/testdata/multiple-lines.txt
new file mode 100644
index 0000000..bead103
--- /dev/null
+++ b/cmds/dumpstate/testdata/multiple-lines.txt
@@ -0,0 +1,3 @@
+I AM LINE1
+I AM LINE2
+I AM LINE3
\ No newline at end of file
diff --git a/cmds/dumpstate/testdata/single-line-with-newline.txt b/cmds/dumpstate/testdata/single-line-with-newline.txt
new file mode 100644
index 0000000..cb48c82
--- /dev/null
+++ b/cmds/dumpstate/testdata/single-line-with-newline.txt
@@ -0,0 +1 @@
+I AM LINE1
diff --git a/cmds/dumpstate/testdata/single-line.txt b/cmds/dumpstate/testdata/single-line.txt
new file mode 100644
index 0000000..2f64046
--- /dev/null
+++ b/cmds/dumpstate/testdata/single-line.txt
@@ -0,0 +1 @@
+I AM LINE1
\ No newline at end of file
diff --git a/cmds/dumpstate/tests/dumpstate_test.cpp b/cmds/dumpstate/tests/dumpstate_test.cpp
new file mode 100644
index 0000000..4073c3c
--- /dev/null
+++ b/cmds/dumpstate/tests/dumpstate_test.cpp
@@ -0,0 +1,424 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "dumpstate.h"
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+#include <libgen.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <thread>
+
+#include <android-base/file.h>
+#include <android-base/properties.h>
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+
+#define LOG_TAG "dumpstate"
+#include <cutils/log.h>
+
+using ::testing::EndsWith;
+using ::testing::IsEmpty;
+using ::testing::StrEq;
+using ::testing::StartsWith;
+using ::testing::Test;
+using ::testing::internal::CaptureStderr;
+using ::testing::internal::CaptureStdout;
+using ::testing::internal::GetCapturedStderr;
+using ::testing::internal::GetCapturedStdout;
+
+// Not used on test cases yet...
+void dumpstate_board(void) {
+}
+
+class DumpstateTest : public Test {
+  public:
+    void SetUp() {
+        SetDryRun(false);
+        SetBuildType(android::base::GetProperty("ro.build.type", "(unknown)"));
+        ds.update_progress_ = false;
+    }
+
+    // Runs a command and capture `stdout` and `stderr`.
+    int RunCommand(const std::string& title, const std::vector<std::string>& full_command,
+                   const CommandOptions& options = CommandOptions::DEFAULT) {
+        CaptureStdout();
+        CaptureStderr();
+        int status = ds.RunCommand(title, full_command, options);
+        out = GetCapturedStdout();
+        err = GetCapturedStderr();
+        return status;
+    }
+
+    // Dumps a file and capture `stdout` and `stderr`.
+    int DumpFile(const std::string& title, const std::string& path) {
+        CaptureStdout();
+        CaptureStderr();
+        int status = ds.DumpFile(title, path);
+        out = GetCapturedStdout();
+        err = GetCapturedStderr();
+        return status;
+    }
+
+    void SetDryRun(bool dry_run) {
+        ALOGD("Setting dry_run_ to %s\n", dry_run ? "true" : "false");
+        ds.dry_run_ = dry_run;
+    }
+
+    void SetBuildType(const std::string& build_type) {
+        ALOGD("Setting build_type_ to '%s'\n", build_type.c_str());
+        ds.build_type_ = build_type;
+    }
+
+    bool IsUserBuild() {
+        return "user" == android::base::GetProperty("ro.build.type", "(unknown)");
+    }
+
+    void DropRoot() {
+        drop_root_user();
+        uid_t uid = getuid();
+        ASSERT_EQ(2000, (int)uid);
+    }
+
+    // TODO: remove when progress is set by Binder callbacks.
+    void AssertSystemProperty(const std::string& key, const std::string& expected_value) {
+        std::string actualValue = android::base::GetProperty(key, "not set");
+        EXPECT_THAT(expected_value, StrEq(actualValue)) << "invalid value for property " << key;
+    }
+
+    std::string GetProgressMessage(int progress, int weigh_total, int old_weigh_total = 0) {
+        EXPECT_EQ(progress, ds.progress_) << "invalid progress";
+        EXPECT_EQ(weigh_total, ds.weight_total_) << "invalid weigh_total";
+
+        AssertSystemProperty(android::base::StringPrintf("dumpstate.%d.progress", getpid()),
+                             std::to_string(progress));
+
+        bool max_increased = old_weigh_total > 0;
+
+        std::string adjustment_message = "";
+        if (max_increased) {
+            AssertSystemProperty(android::base::StringPrintf("dumpstate.%d.max", getpid()),
+                                 std::to_string(weigh_total));
+            adjustment_message = android::base::StringPrintf(
+                "Adjusting total weight from %d to %d\n", old_weigh_total, weigh_total);
+        }
+
+        return android::base::StringPrintf("%sSetting progress (dumpstate.%d.progress): %d/%d\n",
+                                           adjustment_message.c_str(), getpid(), progress,
+                                           weigh_total);
+    }
+
+    // `stdout` and `stderr` from the last command ran.
+    std::string out, err;
+
+    std::string test_path = dirname(android::base::GetExecutablePath().c_str());
+    std::string fixtures_path = test_path + "/../dumpstate_test_fixture/";
+    std::string test_data_path = fixtures_path + "/testdata/";
+    std::string simple_command = fixtures_path + "dumpstate_test_fixture";
+    std::string echo_command = "/system/bin/echo";
+
+    Dumpstate& ds = Dumpstate::GetInstance();
+};
+
+TEST_F(DumpstateTest, RunCommandNoArgs) {
+    EXPECT_EQ(-1, RunCommand("", {}));
+}
+
+TEST_F(DumpstateTest, RunCommandNoTitle) {
+    EXPECT_EQ(0, RunCommand("", {simple_command}));
+    EXPECT_THAT(out, StrEq("stdout\n"));
+    EXPECT_THAT(err, StrEq("stderr\n"));
+}
+
+TEST_F(DumpstateTest, RunCommandWithTitle) {
+    EXPECT_EQ(0, RunCommand("I AM GROOT", {simple_command}));
+    EXPECT_THAT(err, StrEq("stderr\n"));
+    // We don't know the exact duration, so we check the prefix and suffix
+    EXPECT_THAT(out,
+                StartsWith("------ I AM GROOT (" + simple_command + ") ------\nstdout\n------"));
+    EXPECT_THAT(out, EndsWith("s was the duration of 'I AM GROOT' ------\n"));
+}
+
+TEST_F(DumpstateTest, RunCommandWithLoggingMessage) {
+    EXPECT_EQ(
+        0, RunCommand("", {simple_command},
+                      CommandOptions::WithTimeout(10).Log("COMMAND, Y U NO LOG FIRST?").Build()));
+    EXPECT_THAT(out, StrEq("stdout\n"));
+    EXPECT_THAT(err, StrEq("COMMAND, Y U NO LOG FIRST?stderr\n"));
+}
+
+TEST_F(DumpstateTest, RunCommandRedirectStderr) {
+    EXPECT_EQ(0, RunCommand("", {simple_command},
+                            CommandOptions::WithTimeout(10).RedirectStderr().Build()));
+    EXPECT_THAT(out, IsEmpty());
+    EXPECT_THAT(err, StrEq("stdout\nstderr\n"));
+}
+
+TEST_F(DumpstateTest, RunCommandWithOneArg) {
+    EXPECT_EQ(0, RunCommand("", {echo_command, "one"}));
+    EXPECT_THAT(err, IsEmpty());
+    EXPECT_THAT(out, StrEq("one\n"));
+}
+
+TEST_F(DumpstateTest, RunCommandWithMultipleArgs) {
+    EXPECT_EQ(0, RunCommand("", {echo_command, "one", "is", "the", "loniest", "number"}));
+    EXPECT_THAT(err, IsEmpty());
+    EXPECT_THAT(out, StrEq("one is the loniest number\n"));
+}
+
+TEST_F(DumpstateTest, RunCommandDryRun) {
+    SetDryRun(true);
+    EXPECT_EQ(0, RunCommand("I AM GROOT", {simple_command}));
+    // We don't know the exact duration, so we check the prefix and suffix
+    EXPECT_THAT(out, StartsWith("------ I AM GROOT (" + simple_command +
+                                ") ------\n\t(skipped on dry run)\n------"));
+    EXPECT_THAT(out, EndsWith("s was the duration of 'I AM GROOT' ------\n"));
+    EXPECT_THAT(err, IsEmpty());
+}
+
+TEST_F(DumpstateTest, RunCommandDryRunNoTitle) {
+    SetDryRun(true);
+    EXPECT_EQ(0, RunCommand("", {simple_command}));
+    EXPECT_THAT(out, IsEmpty());
+    EXPECT_THAT(err, IsEmpty());
+}
+
+TEST_F(DumpstateTest, RunCommandDryRunAlways) {
+    SetDryRun(true);
+    EXPECT_EQ(0, RunCommand("", {simple_command}, CommandOptions::WithTimeout(10).Always().Build()));
+    EXPECT_THAT(out, StrEq("stdout\n"));
+    EXPECT_THAT(err, StrEq("stderr\n"));
+}
+
+TEST_F(DumpstateTest, RunCommandNotFound) {
+    EXPECT_NE(0, RunCommand("", {"/there/cannot/be/such/command"}));
+    EXPECT_THAT(out, StartsWith("*** command '/there/cannot/be/such/command' failed: exit code"));
+    EXPECT_THAT(err, StartsWith("execvp on command '/there/cannot/be/such/command' failed"));
+}
+
+TEST_F(DumpstateTest, RunCommandFails) {
+    EXPECT_EQ(42, RunCommand("", {simple_command, "--exit", "42"}));
+    EXPECT_THAT(out, StrEq("stdout\n*** command '" + simple_command +
+                           " --exit 42' failed: exit code 42\n"));
+    EXPECT_THAT(err, StrEq("stderr\n*** command '" + simple_command +
+                           " --exit 42' failed: exit code 42\n"));
+}
+
+TEST_F(DumpstateTest, RunCommandCrashes) {
+    EXPECT_NE(0, RunCommand("", {simple_command, "--crash"}));
+    // We don't know the exit code, so check just the prefix.
+    EXPECT_THAT(
+        out, StartsWith("stdout\n*** command '" + simple_command + " --crash' failed: exit code"));
+    EXPECT_THAT(
+        err, StartsWith("stderr\n*** command '" + simple_command + " --crash' failed: exit code"));
+}
+
+TEST_F(DumpstateTest, RunCommandTimesout) {
+    EXPECT_EQ(-1, RunCommand("", {simple_command, "--sleep", "2"},
+                             CommandOptions::WithTimeout(1).Build()));
+    EXPECT_THAT(out, StartsWith("stdout line1\n*** command '" + simple_command +
+                                " --sleep 2' timed out after 1"));
+    EXPECT_THAT(err, StartsWith("sleeping for 2s\n*** command '" + simple_command +
+                                " --sleep 2' timed out after 1"));
+}
+
+TEST_F(DumpstateTest, RunCommandIsKilled) {
+    CaptureStdout();
+    CaptureStderr();
+
+    std::thread t([=]() {
+        EXPECT_EQ(SIGTERM, ds.RunCommand("", {simple_command, "--pid", "--sleep", "20"},
+                                         CommandOptions::WithTimeout(100).Always().Build()));
+    });
+
+    // Capture pid and pre-sleep output.
+    sleep(1);  // Wait a little bit to make sure pid and 1st line were printed.
+    std::string err = GetCapturedStderr();
+    EXPECT_THAT(err, StrEq("sleeping for 20s\n"));
+
+    std::string out = GetCapturedStdout();
+    std::vector<std::string> lines = android::base::Split(out, "\n");
+    ASSERT_EQ(3, (int)lines.size()) << "Invalid lines before sleep: " << out;
+
+    int pid = atoi(lines[0].c_str());
+    EXPECT_THAT(lines[1], StrEq("stdout line1"));
+    EXPECT_THAT(lines[2], IsEmpty());  // \n
+
+    // Then kill the process.
+    CaptureStdout();
+    CaptureStderr();
+    ASSERT_EQ(0, kill(pid, SIGTERM)) << "failed to kill pid " << pid;
+    t.join();
+
+    // Finally, check output after murder.
+    out = GetCapturedStdout();
+    err = GetCapturedStderr();
+
+    EXPECT_THAT(out, StrEq("*** command '" + simple_command +
+                           " --pid --sleep 20' failed: killed by signal 15\n"));
+    EXPECT_THAT(err, StrEq("*** command '" + simple_command +
+                           " --pid --sleep 20' failed: killed by signal 15\n"));
+}
+
+TEST_F(DumpstateTest, RunCommandProgress) {
+    ds.update_progress_ = true;
+    ds.progress_ = 0;
+    ds.weight_total_ = 30;
+
+    EXPECT_EQ(0, RunCommand("", {simple_command}, CommandOptions::WithTimeout(20).Build()));
+    std::string progress_message = GetProgressMessage(20, 30);
+    EXPECT_THAT(out, StrEq("stdout\n"));
+    EXPECT_THAT(err, StrEq("stderr\n" + progress_message));
+
+    EXPECT_EQ(0, RunCommand("", {simple_command}, CommandOptions::WithTimeout(10).Build()));
+    progress_message = GetProgressMessage(30, 30);
+    EXPECT_THAT(out, StrEq("stdout\n"));
+    EXPECT_THAT(err, StrEq("stderr\n" + progress_message));
+
+    // Run a command that will increase maximum timeout.
+    EXPECT_EQ(0, RunCommand("", {simple_command}, CommandOptions::WithTimeout(1).Build()));
+    progress_message = GetProgressMessage(31, 36, 30);  // 20% increase
+    EXPECT_THAT(out, StrEq("stdout\n"));
+    EXPECT_THAT(err, StrEq("stderr\n" + progress_message));
+
+    // Make sure command ran while in dry_run is counted.
+    SetDryRun(true);
+    EXPECT_EQ(0, RunCommand("", {simple_command}, CommandOptions::WithTimeout(4).Build()));
+    progress_message = GetProgressMessage(35, 36);
+    EXPECT_THAT(out, IsEmpty());
+    EXPECT_THAT(err, StrEq(progress_message));
+}
+
+TEST_F(DumpstateTest, RunCommandDropRoot) {
+    // First check root case - only available when running with 'adb root'.
+    uid_t uid = getuid();
+    if (uid == 0) {
+        EXPECT_EQ(0, RunCommand("", {simple_command, "--uid"}));
+        EXPECT_THAT(out, StrEq("0\nstdout\n"));
+        EXPECT_THAT(err, StrEq("stderr\n"));
+        return;
+    }
+    // Then drop root.
+
+    EXPECT_EQ(0, RunCommand("", {simple_command, "--uid"},
+                            CommandOptions::WithTimeout(1).DropRoot().Build()));
+    EXPECT_THAT(out, StrEq("2000\nstdout\n"));
+    EXPECT_THAT(err, StrEq("drop_root_user(): already running as Shell\nstderr\n"));
+}
+
+TEST_F(DumpstateTest, RunCommandAsRootUserBuild) {
+    if (!IsUserBuild()) {
+        // Emulates user build if necessarily.
+        SetBuildType("user");
+    }
+
+    DropRoot();
+
+    EXPECT_EQ(0, RunCommand("", {simple_command}, CommandOptions::WithTimeout(1).AsRoot().Build()));
+
+    // We don't know the exact path of su, so we just check for the 'root ...' commands
+    EXPECT_THAT(out, StartsWith("Skipping"));
+    EXPECT_THAT(out, EndsWith("root " + simple_command + "' on user build.\n"));
+    EXPECT_THAT(err, IsEmpty());
+}
+
+TEST_F(DumpstateTest, RunCommandAsRootNonUserBuild) {
+    if (IsUserBuild()) {
+        ALOGI("Skipping RunCommandAsRootNonUserBuild on user builds\n");
+        return;
+    }
+
+    DropRoot();
+
+    EXPECT_EQ(0, RunCommand("", {simple_command, "--uid"},
+                            CommandOptions::WithTimeout(1).AsRoot().Build()));
+
+    EXPECT_THAT(out, StrEq("0\nstdout\n"));
+    EXPECT_THAT(err, StrEq("stderr\n"));
+}
+
+TEST_F(DumpstateTest, DumpFileNotFoundNoTitle) {
+    EXPECT_EQ(-1, DumpFile("", "/I/cant/believe/I/exist"));
+    EXPECT_THAT(out,
+                StrEq("*** Error dumping /I/cant/believe/I/exist: No such file or directory\n"));
+    EXPECT_THAT(err, IsEmpty());
+}
+
+TEST_F(DumpstateTest, DumpFileNotFoundWithTitle) {
+    EXPECT_EQ(-1, DumpFile("Y U NO EXIST?", "/I/cant/believe/I/exist"));
+    EXPECT_THAT(err, IsEmpty());
+    // We don't know the exact duration, so we check the prefix and suffix
+    EXPECT_THAT(out, StartsWith("*** Error dumping /I/cant/believe/I/exist (Y U NO EXIST?): No "
+                                "such file or directory\n"));
+    EXPECT_THAT(out, EndsWith("s was the duration of 'Y U NO EXIST?' ------\n"));
+}
+
+TEST_F(DumpstateTest, DumpFileSingleLine) {
+    EXPECT_EQ(0, DumpFile("", test_data_path + "single-line.txt"));
+    EXPECT_THAT(err, IsEmpty());
+    EXPECT_THAT(out, StrEq("I AM LINE1\n"));  // dumpstate adds missing newline
+}
+
+TEST_F(DumpstateTest, DumpFileSingleLineWithNewLine) {
+    EXPECT_EQ(0, DumpFile("", test_data_path + "single-line-with-newline.txt"));
+    EXPECT_THAT(err, IsEmpty());
+    EXPECT_THAT(out, StrEq("I AM LINE1\n"));
+}
+
+TEST_F(DumpstateTest, DumpFileMultipleLines) {
+    EXPECT_EQ(0, DumpFile("", test_data_path + "multiple-lines.txt"));
+    EXPECT_THAT(err, IsEmpty());
+    EXPECT_THAT(out, StrEq("I AM LINE1\nI AM LINE2\nI AM LINE3\n"));
+}
+
+TEST_F(DumpstateTest, DumpFileMultipleLinesWithNewLine) {
+    EXPECT_EQ(0, DumpFile("", test_data_path + "multiple-lines-with-newline.txt"));
+    EXPECT_THAT(err, IsEmpty());
+    EXPECT_THAT(out, StrEq("I AM LINE1\nI AM LINE2\nI AM LINE3\n"));
+}
+
+TEST_F(DumpstateTest, DumpFileOnDryRunNoTitle) {
+    SetDryRun(true);
+    EXPECT_EQ(0, DumpFile("", test_data_path + "single-line.txt"));
+    EXPECT_THAT(err, IsEmpty());
+    EXPECT_THAT(out, IsEmpty());
+}
+
+TEST_F(DumpstateTest, DumpFileOnDryRun) {
+    SetDryRun(true);
+    EXPECT_EQ(0, DumpFile("Might as well dump. Dump!", test_data_path + "single-line.txt"));
+    EXPECT_THAT(err, IsEmpty());
+    EXPECT_THAT(out, StartsWith("------ Might as well dump. Dump! (" + test_data_path +
+                                "single-line.txt) ------\n\t(skipped on dry run)\n------"));
+    EXPECT_THAT(out, EndsWith("s was the duration of 'Might as well dump. Dump!' ------\n"));
+    EXPECT_THAT(err, IsEmpty());
+}
+
+TEST_F(DumpstateTest, DumpFileUpdateProgress) {
+    ds.update_progress_ = true;
+    ds.progress_ = 0;
+    ds.weight_total_ = 30;
+
+    EXPECT_EQ(0, DumpFile("", test_data_path + "single-line.txt"));
+
+    std::string progress_message = GetProgressMessage(5, 30);  // TODO: unhardcode WEIGHT_FILE (5)?
+
+    EXPECT_THAT(err, StrEq(progress_message));
+    EXPECT_THAT(out, StrEq("I AM LINE1\n"));  // dumpstate adds missing newline
+}
diff --git a/cmds/dumpstate/tests/dumpstate_test_fixture.cpp b/cmds/dumpstate/tests/dumpstate_test_fixture.cpp
new file mode 100644
index 0000000..5be4719
--- /dev/null
+++ b/cmds/dumpstate/tests/dumpstate_test_fixture.cpp
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#define LOG_TAG "dumpstate"
+#include <cutils/log.h>
+
+void PrintDefaultOutput() {
+    fprintf(stdout, "stdout\n");
+    fflush(stdout);
+    fprintf(stderr, "stderr\n");
+    fflush(stderr);
+}
+
+/*
+ * Binary used to on RunCommand tests.
+ *
+ * Usage:
+ *
+ * - Unless stated otherwise this command:
+ *
+ *   1.Prints `stdout\n` on `stdout` and flushes it.
+ *   2.Prints `stderr\n` on `stderr` and flushes it.
+ *   3.Exit with status 0.
+ *
+ * - If 1st argument is '--pid', it first prints its pid on `stdout`.
+ *
+ * - If 1st argument is '--uid', it first prints its uid on `stdout`.
+ *
+ * - If 1st argument is '--crash', it uses ALOGF to crash and returns 666.
+ *
+ * - With argument '--exit' 'CODE', returns CODE;
+ *
+ * - With argument '--sleep 'TIME':
+ *
+ *   1.Prints `stdout line1\n` on `stdout` and `sleeping TIME s\n` on `stderr`
+ *   2.Sleeps for TIME s
+ *   3.Prints `stdout line2\n` on `stdout` and `woke up\n` on `stderr`
+ */
+int main(int argc, char* const argv[]) {
+    if (argc == 2) {
+        if (strcmp(argv[1], "--crash") == 0) {
+            PrintDefaultOutput();
+            LOG_FATAL("D'OH\n");
+            return 666;
+        }
+    }
+    if (argc == 3) {
+        if (strcmp(argv[1], "--exit") == 0) {
+            PrintDefaultOutput();
+            return atoi(argv[2]);
+        }
+    }
+
+    if (argc > 1) {
+        int index = 1;
+
+        // First check arguments that can shift the index.
+        if (strcmp(argv[1], "--pid") == 0) {
+            index++;
+            fprintf(stdout, "%d\n", getpid());
+            fflush(stdout);
+        } else if (strcmp(argv[1], "--uid") == 0) {
+            index++;
+            fprintf(stdout, "%d\n", getuid());
+            fflush(stdout);
+        }
+
+        // Then the "common" arguments, if any.
+        if (argc > index + 1) {
+            if (strcmp(argv[index], "--sleep") == 0) {
+                int napTime = atoi(argv[index + 1]);
+                fprintf(stdout, "stdout line1\n");
+                fflush(stdout);
+                fprintf(stderr, "sleeping for %ds\n", napTime);
+                fflush(stderr);
+                sleep(napTime);
+                fprintf(stdout, "stdout line2\n");
+                fflush(stdout);
+                fprintf(stderr, "woke up\n");
+                fflush(stderr);
+                return 0;
+            }
+        }
+    }
+
+    PrintDefaultOutput();
+    return 0;
+}
diff --git a/cmds/dumpstate/utils.cpp b/cmds/dumpstate/utils.cpp
index 0d9cce2..31c8697 100644
--- a/cmds/dumpstate/utils.cpp
+++ b/cmds/dumpstate/utils.cpp
@@ -39,6 +39,8 @@
 #define LOG_TAG "dumpstate"
 
 #include <android-base/file.h>
+#include <android-base/properties.h>
+#include <android-base/stringprintf.h>
 #include <cutils/debugger.h>
 #include <cutils/log.h>
 #include <cutils/properties.h>
@@ -49,8 +51,25 @@
 
 #include "dumpstate.h"
 
+#define SU_PATH "/system/xbin/su"
+
 static const int64_t NANOS_PER_SEC = 1000000000;
 
+static const int TRACE_DUMP_TIMEOUT_MS = 10000; // 10 seconds
+
+// TODO: temporary variables and functions used during C++ refactoring
+static Dumpstate& ds = Dumpstate::GetInstance();
+static int RunCommand(const std::string& title, const std::vector<std::string>& full_command,
+                      const CommandOptions& options = CommandOptions::DEFAULT) {
+    return ds.RunCommand(title, full_command, options);
+}
+static bool IsDryRun() {
+    return Dumpstate::GetInstance().IsDryRun();
+}
+static void UpdateProgress(int delta) {
+    ds.UpdateProgress(delta);
+}
+
 /* list of native processes to include in the native dumps */
 // This matches the /proc/pid/exe link instead of /proc/pid/cmdline.
 static const char* native_processes_to_dump[] = {
@@ -67,37 +86,138 @@
         NULL,
 };
 
-DurationReporter::DurationReporter(const char *title) : DurationReporter(title, stdout) {}
+/* Most simple commands have 10 as timeout, so 5 is a good estimate */
+static const int WEIGHT_FILE = 5;
 
-DurationReporter::DurationReporter(const char *title, FILE *out) {
-    title_ = title;
-    if (title) {
-        started_ = DurationReporter::nanotime();
+CommandOptions CommandOptions::DEFAULT = CommandOptions::WithTimeout(10).Build();
+CommandOptions CommandOptions::DEFAULT_DUMPSYS = CommandOptions::WithTimeout(30).Build();
+CommandOptions CommandOptions::AS_ROOT_5 = CommandOptions::WithTimeout(5).AsRoot().Build();
+CommandOptions CommandOptions::AS_ROOT_10 = CommandOptions::WithTimeout(10).AsRoot().Build();
+CommandOptions CommandOptions::AS_ROOT_20 = CommandOptions::WithTimeout(20).AsRoot().Build();
+
+CommandOptions::CommandOptionsBuilder::CommandOptionsBuilder(long timeout) : values(timeout) {
+}
+
+CommandOptions::CommandOptionsBuilder& CommandOptions::CommandOptionsBuilder::Always() {
+    values.always_ = true;
+    return *this;
+}
+
+CommandOptions::CommandOptionsBuilder& CommandOptions::CommandOptionsBuilder::AsRoot() {
+    values.root_mode_ = SU_ROOT;
+    return *this;
+}
+
+CommandOptions::CommandOptionsBuilder& CommandOptions::CommandOptionsBuilder::DropRoot() {
+    values.root_mode_ = DROP_ROOT;
+    return *this;
+}
+
+CommandOptions::CommandOptionsBuilder& CommandOptions::CommandOptionsBuilder::RedirectStderr() {
+    values.stdout_mode_ = REDIRECT_TO_STDERR;
+    return *this;
+}
+
+CommandOptions::CommandOptionsBuilder& CommandOptions::CommandOptionsBuilder::Log(
+    const std::string& message) {
+    values.logging_message_ = message;
+    return *this;
+}
+
+CommandOptions CommandOptions::CommandOptionsBuilder::Build() {
+    return CommandOptions(values);
+}
+
+CommandOptions::CommandOptionsValues::CommandOptionsValues(long timeout)
+    : timeout_(timeout),
+      always_(false),
+      root_mode_(DONT_DROP_ROOT),
+      stdout_mode_(NORMAL_STDOUT),
+      logging_message_("") {
+}
+
+CommandOptions::CommandOptions(const CommandOptionsValues& values) : values(values) {
+}
+
+long CommandOptions::Timeout() const {
+    return values.timeout_;
+}
+
+bool CommandOptions::Always() const {
+    return values.always_;
+}
+
+RootMode CommandOptions::RootMode() const {
+    return values.root_mode_;
+}
+
+StdoutMode CommandOptions::StdoutMode() const {
+    return values.stdout_mode_;
+}
+
+std::string CommandOptions::LoggingMessage() const {
+    return values.logging_message_;
+}
+
+CommandOptions::CommandOptionsBuilder CommandOptions::WithTimeout(long timeout) {
+    return CommandOptions::CommandOptionsBuilder(timeout);
+}
+
+Dumpstate::Dumpstate(const std::string& version, bool dry_run, const std::string& build_type)
+    : version_(version), now_(time(nullptr)), dry_run_(dry_run), build_type_(build_type) {
+}
+
+Dumpstate& Dumpstate::GetInstance() {
+    static Dumpstate singleton_(android::base::GetProperty("dumpstate.version", VERSION_CURRENT),
+                                android::base::GetBoolProperty("dumpstate.dry_run", false),
+                                android::base::GetProperty("ro.build.type", "(unknown)"));
+    return singleton_;
+}
+
+DurationReporter::DurationReporter(const std::string& title) : DurationReporter(title, stdout) {
+}
+
+DurationReporter::DurationReporter(const std::string& title, FILE* out) : title_(title), out_(out) {
+    if (!title_.empty()) {
+        started_ = DurationReporter::Nanotime();
     }
-    out_ = out;
 }
 
 DurationReporter::~DurationReporter() {
-    if (title_) {
-        uint64_t elapsed = DurationReporter::nanotime() - started_;
+    if (!title_.empty()) {
+        uint64_t elapsed = DurationReporter::Nanotime() - started_;
         // Use "Yoda grammar" to make it easier to grep|sort sections.
-        if (out_) {
+        if (out_ != nullptr) {
             fprintf(out_, "------ %.3fs was the duration of '%s' ------\n",
-                   (float) elapsed / NANOS_PER_SEC, title_);
+                    (float)elapsed / NANOS_PER_SEC, title_.c_str());
         } else {
-            MYLOGD("Duration of '%s': %.3fs\n", title_, (float) elapsed / NANOS_PER_SEC);
+            MYLOGD("Duration of '%s': %.3fs\n", title_.c_str(), (float)elapsed / NANOS_PER_SEC);
         }
     }
 }
 
-uint64_t DurationReporter::DurationReporter::nanotime() {
+uint64_t DurationReporter::DurationReporter::Nanotime() {
     struct timespec ts;
     clock_gettime(CLOCK_MONOTONIC, &ts);
     return (uint64_t) ts.tv_sec * NANOS_PER_SEC + ts.tv_nsec;
 }
 
+bool Dumpstate::IsDryRun() const {
+    return dry_run_;
+}
+
+bool Dumpstate::IsUserBuild() const {
+    return "user" == build_type_;
+}
+
+std::string Dumpstate::GetPath(const std::string& suffix) const {
+    return android::base::StringPrintf("%s/%s-%s%s", bugreport_dir_.c_str(), base_name_.c_str(),
+                                       name_.c_str(), suffix.c_str());
+}
+
 void for_each_userid(void (*func)(int), const char *header) {
-    ON_DRY_RUN_RETURN();
+    if (IsDryRun()) return;
+
     DIR *d;
     struct dirent *de;
 
@@ -179,7 +299,8 @@
 }
 
 void for_each_pid(for_each_pid_func func, const char *header) {
-    ON_DRY_RUN_RETURN();
+    if (IsDryRun()) return;
+
     __for_each_pid(for_each_pid_helper, header, (void *) func);
 }
 
@@ -232,12 +353,14 @@
 }
 
 void for_each_tid(for_each_tid_func func, const char *header) {
-    ON_DRY_RUN_RETURN();
+    if (IsDryRun()) return;
+
     __for_each_pid(for_each_tid_helper, header, (void *) func);
 }
 
 void show_wchan(int pid, int tid, const char *name) {
-    ON_DRY_RUN_RETURN();
+    if (IsDryRun()) return;
+
     char path[255];
     char buffer[255];
     int fd, ret, save_errno;
@@ -303,7 +426,8 @@
 }
 
 void show_showtime(int pid, const char *name) {
-    ON_DRY_RUN_RETURN();
+    if (IsDryRun()) return;
+
     char path[255];
     char buffer[1023];
     int fd, ret, save_errno;
@@ -370,7 +494,8 @@
     DurationReporter duration_reporter(title);
     printf("------ %s ------\n", title);
 
-    ON_DRY_RUN_RETURN();
+    if (IsDryRun()) return;
+
     /* Get size of kernel buffer */
     int size = klogctl(KLOG_SIZE_BUFFER, NULL, 0);
     if (size <= 0) {
@@ -400,12 +525,13 @@
 
     snprintf(title, sizeof(title), "SHOW MAP %d (%s)", pid, name);
     snprintf(arg, sizeof(arg), "%d", pid);
-    run_command(title, 10, SU_PATH, "root", "showmap", "-q", arg, NULL);
+    RunCommand(title, {"showmap", "-q", arg}, CommandOptions::AS_ROOT_10);
 }
 
-static int _dump_file_from_fd(const char *title, const char *path, int fd) {
-    if (title) {
-        printf("------ %s (%s", title, path);
+// TODO: when converted to a Dumpstate function, it should be const
+static int _dump_file_from_fd(const std::string& title, const char* path, int fd) {
+    if (!title.empty()) {
+        printf("------ %s (%s", title.c_str(), path);
 
         struct stat st;
         // Only show the modification time of non-device files.
@@ -421,7 +547,6 @@
         }
         printf(") ------\n");
     }
-    ON_DRY_RUN({ update_progress(WEIGHT_FILE); close(fd); return 0; });
 
     bool newline = false;
     fd_set read_set;
@@ -432,14 +557,14 @@
         /* Timeout if no data is read for 30 seconds. */
         tm.tv_sec = 30;
         tm.tv_usec = 0;
-        uint64_t elapsed = DurationReporter::nanotime();
+        uint64_t elapsed = DurationReporter::Nanotime();
         int ret = TEMP_FAILURE_RETRY(select(fd + 1, &read_set, NULL, NULL, &tm));
         if (ret == -1) {
             printf("*** %s: select failed: %s\n", path, strerror(errno));
             newline = true;
             break;
         } else if (ret == 0) {
-            elapsed = DurationReporter::nanotime() - elapsed;
+            elapsed = DurationReporter::Nanotime() - elapsed;
             printf("*** %s: Timed out after %.3fs\n", path,
                    (float) elapsed / NANOS_PER_SEC);
             newline = true;
@@ -459,25 +584,39 @@
             }
         }
     }
-    update_progress(WEIGHT_FILE);
+    UpdateProgress(WEIGHT_FILE);
     close(fd);
 
     if (!newline) printf("\n");
-    if (title) printf("\n");
+    if (!title.empty()) printf("\n");
     return 0;
 }
 
-/* prints the contents of a file */
-int dump_file(const char *title, const char *path) {
+int Dumpstate::DumpFile(const std::string& title, const std::string& path) {
     DurationReporter duration_reporter(title);
-    int fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC));
+    if (IsDryRun()) {
+        if (!title.empty()) {
+            printf("------ %s (%s) ------\n", title.c_str(), path.c_str());
+            printf("\t(skipped on dry run)\n");
+        }
+        UpdateProgress(WEIGHT_FILE);
+        return 0;
+    }
+    return JustDumpFile(title, path);
+}
+
+int Dumpstate::JustDumpFile(const std::string& title, const std::string& path) const {
+    int fd = TEMP_FAILURE_RETRY(open(path.c_str(), O_RDONLY | O_NONBLOCK | O_CLOEXEC));
     if (fd < 0) {
         int err = errno;
-        printf("*** %s: %s\n", path, strerror(err));
-        if (title) printf("\n");
+        if (title.empty()) {
+            printf("*** Error dumping %s: %s\n", path.c_str(), strerror(err));
+        } else {
+            printf("*** Error dumping %s (%s): %s\n", path.c_str(), title.c_str(), strerror(err));
+        }
         return -1;
     }
-    return _dump_file_from_fd(title, path, fd);
+    return _dump_file_from_fd(title, path.c_str(), fd);
 }
 
 int read_file_as_long(const char *path, long int *output) {
@@ -507,9 +646,8 @@
  * to false when set to NULL. dump_from_fd will always be
  * called with title NULL.
  */
-int dump_files(const char *title, const char *dir,
-        bool (*skip)(const char *path),
-        int (*dump_from_fd)(const char *title, const char *path, int fd)) {
+int dump_files(const std::string& title, const char* dir, bool (*skip)(const char* path),
+               int (*dump_from_fd)(const char* title, const char* path, int fd)) {
     DurationReporter duration_reporter(title);
     DIR *dirp;
     struct dirent *d;
@@ -517,10 +655,10 @@
     const char *slash = "/";
     int fd, retval = 0;
 
-    if (title) {
-        printf("------ %s (%s) ------\n", title, dir);
+    if (!title.empty()) {
+        printf("------ %s (%s) ------\n", title.c_str(), dir);
     }
-    ON_DRY_RUN_RETURN(0);
+    if (IsDryRun()) return 0;
 
     if (dir[strlen(dir) - 1] == '/') {
         ++slash;
@@ -551,7 +689,7 @@
             continue;
         }
         if (d->d_type == DT_DIR) {
-            int ret = dump_files(NULL, newpath, skip, dump_from_fd);
+            int ret = dump_files("", newpath, skip, dump_from_fd);
             if (ret < 0) {
                 retval = ret;
             }
@@ -566,7 +704,7 @@
         (*dump_from_fd)(NULL, newpath, fd);
     }
     closedir(dirp);
-    if (title) {
+    if (!title.empty()) {
         printf("\n");
     }
     return retval;
@@ -577,7 +715,8 @@
  * stuck.
  */
 int dump_file_from_fd(const char *title, const char *path, int fd) {
-    ON_DRY_RUN_RETURN(0);
+    if (IsDryRun()) return 0;
+
     int flags = fcntl(fd, F_GETFL);
     if (flags == -1) {
         printf("*** %s: failed to get flags on fd %d: %s\n", path, fd, strerror(errno));
@@ -635,96 +774,87 @@
     return true;
 }
 
-// TODO: refactor all those commands that convert args
-void format_args(const char* command, const char *args[], std::string *string);
-
-int run_command(const char *title, int timeout_seconds, const char *command, ...) {
-    DurationReporter duration_reporter(title);
-    fflush(stdout);
-
-    const char *args[1024] = {command};
-    size_t arg;
-    va_list ap;
-    va_start(ap, command);
-    if (title) printf("------ %s (%s", title, command);
-    bool null_terminated = false;
-    for (arg = 1; arg < sizeof(args) / sizeof(args[0]); ++arg) {
-        args[arg] = va_arg(ap, const char *);
-        if (args[arg] == nullptr) {
-            null_terminated = true;
-            break;
-        }
-        // TODO: null_terminated check is not really working; line below would crash dumpstate if
-        // nullptr is missing
-        if (title) printf(" %s", args[arg]);
-    }
-    if (title) printf(") ------\n");
-    fflush(stdout);
-    if (!null_terminated) {
-        // Fail now, otherwise execvp() call on run_command_always() might hang.
-        std::string cmd;
-        format_args(command, args, &cmd);
-        MYLOGE("skipping command %s because its args were not NULL-terminated", cmd.c_str());
+int Dumpstate::RunCommand(const std::string& title, const std::vector<std::string>& full_command,
+                          const CommandOptions& options) {
+    if (full_command.empty()) {
+        MYLOGE("No arguments on command '%s'\n", title.c_str());
         return -1;
     }
 
-    ON_DRY_RUN({ update_progress(timeout_seconds); va_end(ap); return 0; });
+    int size = full_command.size() + 1;  // null terminated
+    int starting_index = 0;
+    if (options.RootMode() == SU_ROOT) {
+        starting_index = 2;  // "su" "root"
+        size += starting_index;
+    }
 
-    int status = run_command_always(title, DONT_DROP_ROOT, NORMAL_STDOUT, timeout_seconds, args);
-    va_end(ap);
-    return status;
-}
+    std::vector<const char*> args;
+    args.resize(size);
 
-int run_command_as_shell(const char *title, int timeout_seconds, const char *command, ...) {
-    DurationReporter duration_reporter(title);
-    fflush(stdout);
-
-    const char *args[1024] = {command};
-    size_t arg;
-    va_list ap;
-    va_start(ap, command);
-    if (title) printf("------ %s (%s", title, command);
-    bool null_terminated = false;
-    for (arg = 1; arg < sizeof(args) / sizeof(args[0]); ++arg) {
-        args[arg] = va_arg(ap, const char *);
-        if (args[arg] == nullptr) {
-            null_terminated = true;
-            break;
+    std::string command_string;
+    if (options.RootMode() == SU_ROOT) {
+        args[0] = SU_PATH;
+        command_string += SU_PATH;
+        args[1] = "root";
+        command_string += " root ";
+    }
+    int i = starting_index;
+    for (auto arg = full_command.begin(); arg != full_command.end(); ++arg) {
+        args[i++] = arg->c_str();
+        command_string += arg->c_str();
+        if (arg != full_command.end() - 1) {
+            command_string += " ";
         }
-        // TODO: null_terminated check is not really working; line below would crash dumpstate if
-        // nullptr is missing
-        if (title) printf(" %s", args[arg]);
     }
-    if (title) printf(") ------\n");
+    args[i] = nullptr;
+    const char* path = args[0];
+    const char* command = command_string.c_str();
+
+    if (options.RootMode() == SU_ROOT && ds.IsUserBuild()) {
+        printf("Skipping '%s' on user build.\n", command);
+        return 0;
+    }
+
+    if (!title.empty()) {
+        printf("------ %s (%s) ------\n", title.c_str(), command);
+    }
+
     fflush(stdout);
-    if (!null_terminated) {
-        // Fail now, otherwise execvp() call on run_command_always() might hang.
-        std::string cmd;
-        format_args(command, args, &cmd);
-        MYLOGE("skipping command %s because its args were not NULL-terminated", cmd.c_str());
-        return -1;
+    DurationReporter duration_reporter(title);
+
+    const std::string& logging_message = options.LoggingMessage();
+    if (!logging_message.empty()) {
+        MYLOGI(logging_message.c_str(), command_string.c_str());
     }
 
-    ON_DRY_RUN({ update_progress(timeout_seconds); va_end(ap); return 0; });
+    if (IsDryRun() && !options.Always()) {
+        if (!title.empty()) {
+            printf("\t(skipped on dry run)\n");
+        }
+        UpdateProgress(options.Timeout());
+        return 0;
+    }
 
-    int status = run_command_always(title, DROP_ROOT, NORMAL_STDOUT, timeout_seconds, args);
-    va_end(ap);
+    int status = JustRunCommand(command, path, args, options);
+
+    /* TODO: for now we're simplifying the progress calculation by using the
+     * timeout as the weight. It's a good approximation for most cases, except when calling dumpsys,
+     * where its weight should be much higher proportionally to its timeout.
+     * Ideally, it should use a options.EstimatedDuration() instead...*/
+    int weight = options.Timeout();
+
+    if (weight > 0) {
+        UpdateProgress(weight);
+    }
+
     return status;
 }
 
-/* forks a command and waits for it to finish */
-int run_command_always(const char *title, RootMode root_mode, StdoutMode stdout_mode,
-        int timeout_seconds, const char *args[]) {
-    bool silent = (stdout_mode == REDIRECT_TO_STDERR);
-    // TODO: need to check if args is null-terminated, otherwise execvp will crash dumpstate
+int Dumpstate::JustRunCommand(const char* command, const char* path, std::vector<const char*>& args,
+                              const CommandOptions& options) const {
+    bool silent = (options.StdoutMode() == REDIRECT_TO_STDERR);
 
-    /* TODO: for now we're simplifying the progress calculation by using the timeout as the weight.
-     * It's a good approximation for most cases, except when calling dumpsys, where its weight
-     * should be much higher proportionally to its timeout. */
-    int weight = timeout_seconds;
-
-    const char *command = args[0];
-    uint64_t start = DurationReporter::nanotime();
+    uint64_t start = DurationReporter::Nanotime();
     pid_t pid = fork();
 
     /* handle error case */
@@ -736,9 +866,9 @@
 
     /* handle child case */
     if (pid == 0) {
-        if (root_mode == DROP_ROOT && !drop_root_user()) {
-        if (!silent) printf("*** fail todrop root before running %s: %s\n", command,
-                strerror(errno));
+        if (options.RootMode() == DROP_ROOT && !drop_root_user()) {
+            if (!silent)
+                printf("*** failed to drop root before running %s: %s\n", command, strerror(errno));
             MYLOGE("*** could not drop root before running %s: %s\n", command, strerror(errno));
             return -1;
         }
@@ -757,68 +887,71 @@
         sigact.sa_handler = SIG_IGN;
         sigaction(SIGPIPE, &sigact, NULL);
 
-        execvp(command, (char**) args);
-        // execvp's result will be handled after waitpid_with_timeout() below, but if it failed,
-        // it's safer to exit dumpstate.
-        MYLOGD("execvp on command '%s' failed (error: %s)", command, strerror(errno));
+        execvp(path, (char**)args.data());
+        // execvp's result will be handled after waitpid_with_timeout() below, but
+        // if it failed, it's safer to exit dumpstate.
+        MYLOGD("execvp on command '%s' failed (error: %s)\n", command, strerror(errno));
         fflush(stdout);
-        // Must call _exit (instead of exit), otherwise it will corrupt the zip file.
+        // Must call _exit (instead of exit), otherwise it will corrupt the zip
+        // file.
         _exit(EXIT_FAILURE);
     }
 
     /* handle parent case */
     int status;
-    bool ret = waitpid_with_timeout(pid, timeout_seconds, &status);
-    uint64_t elapsed = DurationReporter::nanotime() - start;
-    std::string cmd; // used to log command and its args
+    bool ret = waitpid_with_timeout(pid, options.Timeout(), &status);
+    uint64_t elapsed = DurationReporter::Nanotime() - start;
     if (!ret) {
         if (errno == ETIMEDOUT) {
-            format_args(command, args, &cmd);
-            if (!silent) printf("*** command '%s' timed out after %.3fs (killing pid %d)\n",
-            cmd.c_str(), (float) elapsed / NANOS_PER_SEC, pid);
-            MYLOGE("command '%s' timed out after %.3fs (killing pid %d)\n", cmd.c_str(),
-                   (float) elapsed / NANOS_PER_SEC, pid);
+            if (!silent)
+                printf("*** command '%s' timed out after %.3fs (killing pid %d)\n", command,
+                       (float)elapsed / NANOS_PER_SEC, pid);
+            MYLOGE("*** command '%s' timed out after %.3fs (killing pid %d)\n", command,
+                   (float)elapsed / NANOS_PER_SEC, pid);
         } else {
-            format_args(command, args, &cmd);
-            if (!silent) printf("*** command '%s': Error after %.4fs (killing pid %d)\n",
-            cmd.c_str(), (float) elapsed / NANOS_PER_SEC, pid);
-            MYLOGE("command '%s': Error after %.4fs (killing pid %d)\n", cmd.c_str(),
-                   (float) elapsed / NANOS_PER_SEC, pid);
+            if (!silent)
+                printf("*** command '%s': Error after %.4fs (killing pid %d)\n", command,
+                       (float)elapsed / NANOS_PER_SEC, pid);
+            MYLOGE("command '%s': Error after %.4fs (killing pid %d)\n", command,
+                   (float)elapsed / NANOS_PER_SEC, pid);
         }
         kill(pid, SIGTERM);
-        if (!waitpid_with_timeout(pid, 5, NULL)) {
+        if (!waitpid_with_timeout(pid, 5, nullptr)) {
             kill(pid, SIGKILL);
-            if (!waitpid_with_timeout(pid, 5, NULL)) {
-                if (!silent) printf("could not kill command '%s' (pid %d) even with SIGKILL.\n",
-                        command, pid);
+            if (!waitpid_with_timeout(pid, 5, nullptr)) {
+                if (!silent)
+                    printf("could not kill command '%s' (pid %d) even with SIGKILL.\n", command,
+                           pid);
                 MYLOGE("could not kill command '%s' (pid %d) even with SIGKILL.\n", command, pid);
             }
         }
         return -1;
-    } else if (status) {
-        format_args(command, args, &cmd);
-        if (!silent) printf("*** command '%s' failed: %s\n", cmd.c_str(), strerror(errno));
-        MYLOGE("command '%s' failed: %s\n", cmd.c_str(), strerror(errno));
-        return -2;
     }
 
     if (WIFSIGNALED(status)) {
-        if (!silent) printf("*** %s: Killed by signal %d\n", command, WTERMSIG(status));
-        MYLOGE("*** %s: Killed by signal %d\n", command, WTERMSIG(status));
+        if (!silent)
+            printf("*** command '%s' failed: killed by signal %d\n", command, WTERMSIG(status));
+        MYLOGE("*** command '%s' failed: killed by signal %d\n", command, WTERMSIG(status));
     } else if (WIFEXITED(status) && WEXITSTATUS(status) > 0) {
-        if (!silent) printf("*** %s: Exit code %d\n", command, WEXITSTATUS(status));
-        MYLOGE("*** %s: Exit code %d\n", command, WEXITSTATUS(status));
+        status = WEXITSTATUS(status);
+        if (!silent) printf("*** command '%s' failed: exit code %d\n", command, status);
+        MYLOGE("*** command '%s' failed: exit code %d\n", command, status);
     }
 
-    if (weight > 0) {
-        update_progress(weight);
-    }
     return status;
 }
 
+void Dumpstate::RunDumpsys(const std::string& title, const std::vector<std::string>& dumpsys_args,
+                           const CommandOptions& options, long dumpsysTimeout) {
+    long timeout = dumpsysTimeout > 0 ? dumpsysTimeout : options.Timeout();
+    std::vector<std::string> dumpsys = {"/system/bin/dumpsys", "-t", std::to_string(timeout)};
+    dumpsys.insert(dumpsys.end(), dumpsys_args.begin(), dumpsys_args.end());
+    RunCommand(title, dumpsys, options);
+}
+
 bool drop_root_user() {
     if (getgid() == AID_SHELL && getuid() == AID_SHELL) {
-        MYLOGD("drop_root_user(): already running as Shell");
+        MYLOGD("drop_root_user(): already running as Shell\n");
         return true;
     }
     /* ensure we will keep capabilities when we drop root */
@@ -866,22 +999,16 @@
 }
 
 void send_broadcast(const std::string& action, const std::vector<std::string>& args) {
-    if (args.size() > 1000) {
-        MYLOGE("send_broadcast: too many arguments (%d)\n", (int) args.size());
-        return;
-    }
-    const char *am_args[1024] = { "/system/bin/am", "broadcast", "--user", "0", "-a",
-                                  action.c_str() };
-    size_t am_index = 5; // Starts at the index of last initial value above.
-    for (const std::string& arg : args) {
-        am_args[++am_index] = arg.c_str();
-    }
-    // Always terminate with NULL.
-    am_args[am_index + 1] = NULL;
-    std::string args_string;
-    format_args(am_index + 1, am_args, &args_string);
-    MYLOGD("send_broadcast command: %s\n", args_string.c_str());
-    run_command_always(NULL, DROP_ROOT, REDIRECT_TO_STDERR, 20, am_args);
+    std::vector<std::string> am = {"/system/bin/am", "broadcast", "--user", "0", "-a", action};
+
+    am.insert(am.end(), args.begin(), args.end());
+
+    RunCommand("", am, CommandOptions::WithTimeout(20)
+                           .Log("Sending broadcast: '%s'\n")
+                           .Always()
+                           .DropRoot()
+                           .RedirectStderr()
+                           .Build());
 }
 
 size_t num_props = 0;
@@ -905,7 +1032,7 @@
     const char* title = "SYSTEM PROPERTIES";
     DurationReporter duration_reporter(title);
     printf("------ %s ------\n", title);
-    ON_DRY_RUN_RETURN();
+    if (IsDryRun()) return;
     size_t i;
     num_props = 0;
     property_list(print_prop, NULL);
@@ -976,11 +1103,11 @@
     }
 }
 
-/* redirect output to a file */
-void redirect_to_file(FILE *redirect, char *path) {
+void _redirect_to_file(FILE *redirect, char *path, int truncate_flag) {
     create_parent_dirs(path);
 
-    int fd = TEMP_FAILURE_RETRY(open(path, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC | O_NOFOLLOW,
+    int fd = TEMP_FAILURE_RETRY(open(path,
+                                     O_WRONLY | O_CREAT | truncate_flag | O_CLOEXEC | O_NOFOLLOW,
                                      S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH));
     if (fd < 0) {
         MYLOGE("%s: %s\n", path, strerror(errno));
@@ -991,6 +1118,14 @@
     close(fd);
 }
 
+void redirect_to_file(FILE *redirect, char *path) {
+    _redirect_to_file(redirect, path, O_TRUNC);
+}
+
+void redirect_to_existing_file(FILE *redirect, char *path) {
+    _redirect_to_file(redirect, path, O_APPEND);
+}
+
 static bool should_dump_native_traces(const char* path) {
     for (const char** p = native_processes_to_dump; *p; p++) {
         if (!strcmp(*p, path)) {
@@ -1002,35 +1137,34 @@
 
 /* dump Dalvik and native stack traces, return the trace file location (NULL if none) */
 const char *dump_traces() {
-    DurationReporter duration_reporter("DUMP TRACES", NULL);
-    ON_DRY_RUN_RETURN(NULL);
-    const char* result = NULL;
+    DurationReporter duration_reporter("DUMP TRACES", nullptr);
+    if (IsDryRun()) return nullptr;
 
-    char traces_path[PROPERTY_VALUE_MAX] = "";
-    property_get("dalvik.vm.stack-trace-file", traces_path, "");
-    if (!traces_path[0]) return NULL;
+    const char* result = nullptr;
+
+    std::string tracesPath = android::base::GetProperty("dalvik.vm.stack-trace-file", "");
+    if (tracesPath.empty()) return nullptr;
 
     /* move the old traces.txt (if any) out of the way temporarily */
-    char anr_traces_path[PATH_MAX];
-    strlcpy(anr_traces_path, traces_path, sizeof(anr_traces_path));
-    strlcat(anr_traces_path, ".anr", sizeof(anr_traces_path));
-    if (rename(traces_path, anr_traces_path) && errno != ENOENT) {
-        MYLOGE("rename(%s, %s): %s\n", traces_path, anr_traces_path, strerror(errno));
-        return NULL;  // Can't rename old traces.txt -- no permission? -- leave it alone instead
+    std::string anrTracesPath = tracesPath + ".anr";
+    if (rename(tracesPath.c_str(), anrTracesPath.c_str()) && errno != ENOENT) {
+        MYLOGE("rename(%s, %s): %s\n", tracesPath.c_str(), anrTracesPath.c_str(), strerror(errno));
+        return nullptr;  // Can't rename old traces.txt -- no permission? -- leave it alone instead
     }
 
     /* create a new, empty traces.txt file to receive stack dumps */
-    int fd = TEMP_FAILURE_RETRY(open(traces_path, O_CREAT | O_WRONLY | O_TRUNC | O_NOFOLLOW | O_CLOEXEC,
-                                     0666));  /* -rw-rw-rw- */
+    int fd = TEMP_FAILURE_RETRY(open(tracesPath.c_str(),
+                                     O_CREAT | O_WRONLY | O_TRUNC | O_NOFOLLOW | O_CLOEXEC,
+                                     0666)); /* -rw-rw-rw- */
     if (fd < 0) {
-        MYLOGE("%s: %s\n", traces_path, strerror(errno));
-        return NULL;
+        MYLOGE("%s: %s\n", tracesPath.c_str(), strerror(errno));
+        return nullptr;
     }
     int chmod_ret = fchmod(fd, 0666);
     if (chmod_ret < 0) {
-        MYLOGE("fchmod on %s failed: %s\n", traces_path, strerror(errno));
+        MYLOGE("fchmod on %s failed: %s\n", tracesPath.c_str(), strerror(errno));
         close(fd);
-        return NULL;
+        return nullptr;
     }
 
     /* Variables below must be initialized before 'goto' statements */
@@ -1051,9 +1185,9 @@
         goto error_close_fd;
     }
 
-    wfd = inotify_add_watch(ifd, traces_path, IN_CLOSE_WRITE);
+    wfd = inotify_add_watch(ifd, tracesPath.c_str(), IN_CLOSE_WRITE);
     if (wfd < 0) {
-        MYLOGE("inotify_add_watch(%s): %s\n", traces_path, strerror(errno));
+        MYLOGE("inotify_add_watch(%s): %s\n", tracesPath.c_str(), strerror(errno));
         goto error_close_ifd;
     }
 
@@ -1086,7 +1220,7 @@
             }
 
             ++dalvik_found;
-            uint64_t start = DurationReporter::nanotime();
+            uint64_t start = DurationReporter::Nanotime();
             if (kill(pid, SIGQUIT)) {
                 MYLOGE("kill(%d, SIGQUIT): %s\n", pid, strerror(errno));
                 continue;
@@ -1094,7 +1228,7 @@
 
             /* wait for the writable-close notification from inotify */
             struct pollfd pfd = { ifd, POLLIN, 0 };
-            int ret = poll(&pfd, 1, 5000);  /* 5 sec timeout */
+            int ret = poll(&pfd, 1, TRACE_DUMP_TIMEOUT_MS);
             if (ret < 0) {
                 MYLOGE("poll: %s\n", strerror(errno));
             } else if (ret == 0) {
@@ -1107,8 +1241,8 @@
             if (lseek(fd, 0, SEEK_END) < 0) {
                 MYLOGE("lseek: %s\n", strerror(errno));
             } else {
-                dprintf(fd, "[dump dalvik stack %d: %.3fs elapsed]\n",
-                        pid, (float)(DurationReporter::nanotime() - start) / NANOS_PER_SEC);
+                dprintf(fd, "[dump dalvik stack %d: %.3fs elapsed]\n", pid,
+                        (float)(DurationReporter::Nanotime() - start) / NANOS_PER_SEC);
             }
         } else if (should_dump_native_traces(data)) {
             /* dump native process if appropriate */
@@ -1116,7 +1250,7 @@
                 MYLOGE("lseek: %s\n", strerror(errno));
             } else {
                 static uint16_t timeout_failures = 0;
-                uint64_t start = DurationReporter::nanotime();
+                uint64_t start = DurationReporter::Nanotime();
 
                 /* If 3 backtrace dumps fail in a row, consider debuggerd dead. */
                 if (timeout_failures == 3) {
@@ -1127,8 +1261,8 @@
                 } else {
                     timeout_failures = 0;
                 }
-                dprintf(fd, "[dump native stack %d: %.3fs elapsed]\n",
-                        pid, (float)(DurationReporter::nanotime() - start) / NANOS_PER_SEC);
+                dprintf(fd, "[dump native stack %d: %.3fs elapsed]\n", pid,
+                        (float)(DurationReporter::Nanotime() - start) / NANOS_PER_SEC);
             }
         }
     }
@@ -1137,17 +1271,15 @@
         MYLOGE("Warning: no Dalvik processes found to dump stacks\n");
     }
 
-    static char dump_traces_path[PATH_MAX];
-    strlcpy(dump_traces_path, traces_path, sizeof(dump_traces_path));
-    strlcat(dump_traces_path, ".bugreport", sizeof(dump_traces_path));
-    if (rename(traces_path, dump_traces_path)) {
-        MYLOGE("rename(%s, %s): %s\n", traces_path, dump_traces_path, strerror(errno));
+    static std::string dumpTracesPath = tracesPath + ".bugreport";
+    if (rename(tracesPath.c_str(), dumpTracesPath.c_str())) {
+        MYLOGE("rename(%s, %s): %s\n", tracesPath.c_str(), dumpTracesPath.c_str(), strerror(errno));
         goto error_close_ifd;
     }
-    result = dump_traces_path;
+    result = dumpTracesPath.c_str();
 
     /* replace the saved [ANR] traces.txt file */
-    rename(anr_traces_path, traces_path);
+    rename(anrTracesPath.c_str(), tracesPath.c_str());
 
 error_close_ifd:
     close(ifd);
@@ -1158,9 +1290,9 @@
 
 void dump_route_tables() {
     DurationReporter duration_reporter("DUMP ROUTE TABLES");
-    ON_DRY_RUN_RETURN();
+    if (IsDryRun()) return;
     const char* const RT_TABLES_PATH = "/data/misc/net/rt_tables";
-    dump_file("RT_TABLES", RT_TABLES_PATH);
+    ds.DumpFile("RT_TABLES", RT_TABLES_PATH);
     FILE* fp = fopen(RT_TABLES_PATH, "re");
     if (!fp) {
         printf("*** %s: %s\n", RT_TABLES_PATH, strerror(errno));
@@ -1171,55 +1303,50 @@
     // need the table number. It's a 32-bit unsigned number, so max 10 chars. Skip the table name.
     // Add a fixed max limit so this doesn't go awry.
     for (int i = 0; i < 64 && fscanf(fp, " %10s %*s", table) == 1; ++i) {
-        run_command("ROUTE TABLE IPv4", 10, "ip", "-4", "route", "show", "table", table, NULL);
-        run_command("ROUTE TABLE IPv6", 10, "ip", "-6", "route", "show", "table", table, NULL);
+        RunCommand("ROUTE TABLE IPv4", {"ip", "-4", "route", "show", "table", table});
+        RunCommand("ROUTE TABLE IPv6", {"ip", "-6", "route", "show", "table", table});
     }
     fclose(fp);
 }
 
-/* overall progress */
-int progress = 0;
-int do_update_progress = 0; // Set by dumpstate.cpp
-int weight_total = WEIGHT_TOTAL;
-
 // TODO: make this function thread safe if sections are generated in parallel.
-void update_progress(int delta) {
-    if (!do_update_progress) return;
+void Dumpstate::UpdateProgress(int delta) {
+    if (!update_progress_) return;
 
-    progress += delta;
+    progress_ += delta;
 
     char key[PROPERTY_KEY_MAX];
     char value[PROPERTY_VALUE_MAX];
 
     // adjusts max on the fly
-    if (progress > weight_total) {
-        int new_total = weight_total * 1.2;
-        MYLOGD("Adjusting total weight from %d to %d\n", weight_total, new_total);
-        weight_total = new_total;
+    if (progress_ > weight_total_) {
+        int new_total = weight_total_ * 1.2;
+        MYLOGD("Adjusting total weight from %d to %d\n", weight_total_, new_total);
+        weight_total_ = new_total;
         snprintf(key, sizeof(key), "dumpstate.%d.max", getpid());
-        snprintf(value, sizeof(value), "%d", weight_total);
+        snprintf(value, sizeof(value), "%d", weight_total_);
         int status = property_set(key, value);
-        if (status) {
+        if (status != 0) {
             MYLOGE("Could not update max weight by setting system property %s to %s: %d\n",
                     key, value, status);
         }
     }
 
     snprintf(key, sizeof(key), "dumpstate.%d.progress", getpid());
-    snprintf(value, sizeof(value), "%d", progress);
+    snprintf(value, sizeof(value), "%d", progress_);
 
-    if (progress % 100 == 0) {
+    if (progress_ % 100 == 0) {
         // We don't want to spam logcat, so only log multiples of 100.
-        MYLOGD("Setting progress (%s): %s/%d\n", key, value, weight_total);
+        MYLOGD("Setting progress (%s): %s/%d\n", key, value, weight_total_);
     } else {
         // stderr is ignored on normal invocations, but useful when calling /system/bin/dumpstate
         // directly for debuggging.
-        fprintf(stderr, "Setting progress (%s): %s/%d\n", key, value, weight_total);
+        fprintf(stderr, "Setting progress (%s): %s/%d\n", key, value, weight_total_);
     }
 
-    if (control_socket_fd >= 0) {
-        dprintf(control_socket_fd, "PROGRESS:%d/%d\n", progress, weight_total);
-        fsync(control_socket_fd);
+    if (control_socket_fd_ >= 0) {
+        dprintf(control_socket_fd_, "PROGRESS:%d/%d\n", progress_, weight_total_);
+        fsync(control_socket_fd_);
     }
 
     int status = property_set(key, value);
@@ -1229,9 +1356,16 @@
     }
 }
 
-void take_screenshot(const std::string& path) {
-    const char *args[] = { "/system/bin/screencap", "-p", path.c_str(), NULL };
-    run_command_always(NULL, DONT_DROP_ROOT, REDIRECT_TO_STDERR, 10, args);
+void Dumpstate::TakeScreenshot(const std::string& path) {
+    const std::string& real_path = path.empty() ? screenshot_path_ : path;
+    int status =
+        RunCommand("", {"/system/bin/screencap", "-p", real_path},
+                   CommandOptions::WithTimeout(10).Always().DropRoot().RedirectStderr().Build());
+    if (status == 0) {
+        MYLOGD("Screenshot saved on %s\n", real_path.c_str());
+    } else {
+        MYLOGE("Failed to take screenshot on %s\n", real_path.c_str());
+    }
 }
 
 void vibrate(FILE* vibrator, int ms) {
@@ -1368,30 +1502,3 @@
 
     printf("\n");
 }
-
-// TODO: refactor all those commands that convert args
-void format_args(int argc, const char *argv[], std::string *args) {
-    LOG_ALWAYS_FATAL_IF(args == nullptr);
-    for (int i = 0; i < argc; i++) {
-        args->append(argv[i]);
-        if (i < argc -1) {
-          args->append(" ");
-        }
-    }
-}
-void format_args(const char* command, const char *args[], std::string *string) {
-    LOG_ALWAYS_FATAL_IF(args == nullptr || command == nullptr);
-    string->append(command);
-    if (args[0] == nullptr) return;
-    string->append(" ");
-
-    for (int arg = 1; arg <= 1000; ++arg) {
-        if (args[arg] == nullptr) return;
-        string->append(args[arg]);
-        if (args[arg+1] != nullptr) {
-            string->append(" ");
-        }
-    }
-    // TODO: not really working: if NULL is missing, it will crash dumpstate.
-    MYLOGE("internal error: missing NULL entry on %s", string->c_str());
-}
diff --git a/cmds/dumpsys/.clang-format b/cmds/dumpsys/.clang-format
new file mode 100644
index 0000000..fc4eb1b
--- /dev/null
+++ b/cmds/dumpsys/.clang-format
@@ -0,0 +1,13 @@
+BasedOnStyle: Google
+AllowShortBlocksOnASingleLine: false
+AllowShortFunctionsOnASingleLine: false
+
+AccessModifierOffset: -2
+ColumnLimit: 100
+CommentPragmas: NOLINT:.*
+DerivePointerAlignment: false
+IndentWidth: 4
+PointerAlignment: Left
+TabWidth: 4
+UseTab: Never
+PenaltyExcessCharacter: 32
diff --git a/cmds/dumpsys/Android.bp b/cmds/dumpsys/Android.bp
index 38442e7..3476964 100644
--- a/cmds/dumpsys/Android.bp
+++ b/cmds/dumpsys/Android.bp
@@ -1,7 +1,14 @@
-cc_binary {
-    name: "dumpsys",
+cc_defaults {
+    name: "dumpsys_defaults",
 
-    srcs: ["dumpsys.cpp"],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+
+    srcs: [
+        "dumpsys.cpp",
+    ],
 
     shared_libs: [
         "libbase",
@@ -10,6 +17,34 @@
         "libbinder",
     ],
 
-    cflags: ["-DXP_UNIX"],
-    //shared_libs: ["librt"],
+    clang: true,
 }
+
+//
+// Static library used in testing and executable
+//
+
+cc_library_static {
+    name: "libdumpsys",
+
+    defaults: ["dumpsys_defaults"],
+
+    export_include_dirs: ["."],
+}
+
+
+//
+// Executable
+//
+
+cc_binary {
+    name: "dumpsys",
+
+    defaults: ["dumpsys_defaults"],
+
+    srcs: [
+        "main.cpp",
+    ],
+}
+
+subdirs = ["tests"]
diff --git a/cmds/dumpsys/dumpsys.cpp b/cmds/dumpsys/dumpsys.cpp
index 772d17f..f0e7200 100644
--- a/cmds/dumpsys/dumpsys.cpp
+++ b/cmds/dumpsys/dumpsys.cpp
@@ -1,10 +1,19 @@
 /*
- * Command that dumps interesting system state to the log.
+ * Copyright (C) 2009 The Android Open Source Project
  *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
-#define LOG_TAG "dumpsys"
-
 #include <algorithm>
 #include <chrono>
 #include <thread>
@@ -12,7 +21,6 @@
 #include <android-base/file.h>
 #include <android-base/stringprintf.h>
 #include <android-base/unique_fd.h>
-#include <binder/IServiceManager.h>
 #include <binder/Parcel.h>
 #include <binder/ProcessState.h>
 #include <binder/TextOutput.h>
@@ -30,6 +38,8 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#include "dumpsys.h"
+
 using namespace android;
 using android::base::StringPrintf;
 using android::base::unique_fd;
@@ -53,7 +63,7 @@
             "         SERVICE [ARGS]: dumps only service SERVICE, optionally passing ARGS to it\n");
 }
 
-bool IsSkipped(const Vector<String16>& skipped, const String16& service) {
+static bool IsSkipped(const Vector<String16>& skipped, const String16& service) {
     for (const auto& candidate : skipped) {
         if (candidate == service) {
             return true;
@@ -62,17 +72,7 @@
     return false;
 }
 
-int main(int argc, char* const argv[])
-{
-    signal(SIGPIPE, SIG_IGN);
-    sp<IServiceManager> sm = defaultServiceManager();
-    fflush(stdout);
-    if (sm == NULL) {
-        ALOGE("Unable to get default service manager!");
-        aerr << "dumpsys: Unable to get default service manager!" << endl;
-        return 20;
-    }
-
+int Dumpsys::main(int argc, char* const argv[]) {
     Vector<String16> services;
     Vector<String16> args;
     Vector<String16> skippedServices;
@@ -85,6 +85,9 @@
         {     0,           0, 0,  0 }
     };
 
+    // Must reset optind, otherwise subsequent calls will fail (wouldn't happen on main.cpp, but
+    // happens on test cases).
+    optind = 1;
     while (1) {
         int c;
         int optionIndex = 0;
@@ -147,7 +150,7 @@
 
     if (services.empty() || showListOnly) {
         // gets all services
-        services = sm->listServices();
+        services = sm_->listServices();
         services.sort(sort_func);
         args.add(String16("-a"));
     }
@@ -159,8 +162,9 @@
         aout << "Currently running services:" << endl;
 
         for (size_t i=0; i<N; i++) {
-            sp<IBinder> service = sm->checkService(services[i]);
-            if (service != NULL) {
+            sp<IBinder> service = sm_->checkService(services[i]);
+
+            if (service != nullptr) {
                 bool skipped = IsSkipped(skippedServices, services[i]);
                 aout << "  " << services[i] << (skipped ? " (skipped)" : "") << endl;
             }
@@ -175,8 +179,8 @@
         String16 service_name = std::move(services[i]);
         if (IsSkipped(skippedServices, service_name)) continue;
 
-        sp<IBinder> service = sm->checkService(service_name);
-        if (service != NULL) {
+        sp<IBinder> service = sm_->checkService(service_name);
+        if (service != nullptr) {
             int sfd[2];
 
             if (pipe(sfd) != 0) {
@@ -262,7 +266,10 @@
             }
 
             if (timed_out) {
-                aout << endl << "*** SERVICE DUMP TIMEOUT EXPIRED ***" << endl << endl;
+                aout << endl
+                     << "*** SERVICE '" << service_name << "' DUMP TIMEOUT (" << timeoutArg
+                     << "s) EXPIRED ***" << endl
+                     << endl;
             }
 
             if (timed_out || error) {
diff --git a/cmds/dumpsys/dumpsys.h b/cmds/dumpsys/dumpsys.h
new file mode 100644
index 0000000..2534dde
--- /dev/null
+++ b/cmds/dumpsys/dumpsys.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef FRAMEWORK_NATIVE_CMD_DUMPSYS_H_
+#define FRAMEWORK_NATIVE_CMD_DUMPSYS_H_
+
+#include <binder/IServiceManager.h>
+
+namespace android {
+
+class Dumpsys {
+  public:
+    Dumpsys(android::IServiceManager* sm) : sm_(sm) {
+    }
+    int main(int argc, char* const argv[]);
+
+  private:
+    android::IServiceManager* sm_;
+};
+}
+
+#endif  // FRAMEWORK_NATIVE_CMD_DUMPSYS_H_
diff --git a/cmds/dumpsys/main.cpp b/cmds/dumpsys/main.cpp
new file mode 100644
index 0000000..8ba0eba
--- /dev/null
+++ b/cmds/dumpsys/main.cpp
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * Command that dumps interesting system state to the log.
+ */
+
+#include "dumpsys.h"
+
+#include <binder/IServiceManager.h>
+#include <binder/TextOutput.h>
+
+#include <signal.h>
+#include <stdio.h>
+
+using namespace android;
+
+int main(int argc, char* const argv[]) {
+    signal(SIGPIPE, SIG_IGN);
+    sp<IServiceManager> sm = defaultServiceManager();
+    fflush(stdout);
+    if (sm == nullptr) {
+        ALOGE("Unable to get default service manager!");
+        aerr << "dumpsys: Unable to get default service manager!" << endl;
+        return 20;
+    }
+
+    Dumpsys dumpsys(sm.get());
+    return dumpsys.main(argc, argv);
+}
diff --git a/cmds/dumpsys/tests/Android.bp b/cmds/dumpsys/tests/Android.bp
new file mode 100644
index 0000000..7698ed5
--- /dev/null
+++ b/cmds/dumpsys/tests/Android.bp
@@ -0,0 +1,19 @@
+// Build the unit tests for dumpsys
+cc_test {
+    name: "dumpsys_test",
+
+    srcs: ["dumpsys_test.cpp"],
+
+    shared_libs: [
+        "libbase",
+        "libbinder",
+        "libutils",
+    ],
+
+    static_libs: [
+        "libdumpsys",
+        "libgmock",
+    ],
+
+    clang: true,
+}
diff --git a/cmds/dumpsys/tests/dumpsys_test.cpp b/cmds/dumpsys/tests/dumpsys_test.cpp
new file mode 100644
index 0000000..a61cb00
--- /dev/null
+++ b/cmds/dumpsys/tests/dumpsys_test.cpp
@@ -0,0 +1,299 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "../dumpsys.h"
+
+#include <vector>
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+#include <android-base/file.h>
+#include <utils/String16.h>
+#include <utils/Vector.h>
+
+using namespace android;
+
+using ::testing::_;
+using ::testing::Action;
+using ::testing::ActionInterface;
+using ::testing::DoAll;
+using ::testing::Eq;
+using ::testing::HasSubstr;
+using ::testing::MakeAction;
+using ::testing::Not;
+using ::testing::Return;
+using ::testing::StrEq;
+using ::testing::Test;
+using ::testing::WithArg;
+using ::testing::internal::CaptureStderr;
+using ::testing::internal::CaptureStdout;
+using ::testing::internal::GetCapturedStderr;
+using ::testing::internal::GetCapturedStdout;
+
+class ServiceManagerMock : public IServiceManager {
+  public:
+    MOCK_CONST_METHOD1(getService, sp<IBinder>(const String16&));
+    MOCK_CONST_METHOD1(checkService, sp<IBinder>(const String16&));
+    MOCK_METHOD3(addService, status_t(const String16&, const sp<IBinder>&, bool));
+    MOCK_METHOD0(listServices, Vector<String16>());
+
+  protected:
+    MOCK_METHOD0(onAsBinder, IBinder*());
+};
+
+class BinderMock : public BBinder {
+  public:
+    BinderMock() {
+    }
+
+    MOCK_METHOD2(dump, status_t(int, const Vector<String16>&));
+};
+
+// gmock black magic to provide a WithArg<0>(WriteOnFd(output)) matcher
+typedef void WriteOnFdFunction(int);
+
+class WriteOnFdAction : public ActionInterface<WriteOnFdFunction> {
+  public:
+    explicit WriteOnFdAction(const std::string& output) : output_(output) {
+    }
+    virtual Result Perform(const ArgumentTuple& args) {
+        int fd = ::std::tr1::get<0>(args);
+        android::base::WriteStringToFd(output_, fd);
+    }
+
+  private:
+    std::string output_;
+};
+
+// Matcher used to emulate dump() by writing on its file descriptor.
+Action<WriteOnFdFunction> WriteOnFd(const std::string& output) {
+    return MakeAction(new WriteOnFdAction(output));
+}
+
+// Matcher for args using Android's Vector<String16> format
+// TODO: move it to some common testing library
+MATCHER_P(AndroidElementsAre, expected, "") {
+    std::ostringstream errors;
+    if (arg.size() != expected.size()) {
+        errors << " sizes do not match (expected " << expected.size() << ", got " << arg.size()
+               << ")\n";
+    }
+    int i = 0;
+    std::ostringstream actual_stream, expected_stream;
+    for (String16 actual : arg) {
+        std::string actual_str = String16::std_string(actual);
+        std::string expected_str = expected[i];
+        actual_stream << "'" << actual_str << "' ";
+        expected_stream << "'" << expected_str << "' ";
+        if (actual_str != expected_str) {
+            errors << " element mismatch at index " << i << "\n";
+        }
+        i++;
+    }
+
+    if (!errors.str().empty()) {
+        errors << "\nExpected args: " << expected_stream.str()
+               << "\nActual args: " << actual_stream.str();
+        *result_listener << errors.str();
+        return false;
+    }
+    return true;
+}
+
+// Custom action to sleep for timeout seconds
+ACTION_P(Sleep, timeout) {
+    sleep(timeout);
+}
+
+class DumpsysTest : public Test {
+  public:
+    DumpsysTest() : sm_(), dump_(&sm_), stdout_(), stderr_() {
+    }
+
+    void ExpectListServices(std::vector<std::string> services) {
+        Vector<String16> services16;
+        for (auto& service : services) {
+            services16.add(String16(service.c_str()));
+        }
+        EXPECT_CALL(sm_, listServices()).WillRepeatedly(Return(services16));
+    }
+
+    sp<BinderMock> ExpectCheckService(const char* name, bool running = true) {
+        sp<BinderMock> binder_mock;
+        if (running) {
+            binder_mock = new BinderMock;
+        }
+        EXPECT_CALL(sm_, checkService(String16(name))).WillRepeatedly(Return(binder_mock));
+        return binder_mock;
+    }
+
+    void ExpectDump(const char* name, const std::string& output) {
+        sp<BinderMock> binder_mock = ExpectCheckService(name);
+        EXPECT_CALL(*binder_mock, dump(_, _))
+            .WillRepeatedly(DoAll(WithArg<0>(WriteOnFd(output)), Return(0)));
+    }
+
+    void ExpectDumpWithArgs(const char* name, std::vector<std::string> args,
+                            const std::string& output) {
+        sp<BinderMock> binder_mock = ExpectCheckService(name);
+        EXPECT_CALL(*binder_mock, dump(_, AndroidElementsAre(args)))
+            .WillRepeatedly(DoAll(WithArg<0>(WriteOnFd(output)), Return(0)));
+    }
+
+    void ExpectDumpAndHang(const char* name, int timeout_s, const std::string& output) {
+        sp<BinderMock> binder_mock = ExpectCheckService(name);
+        EXPECT_CALL(*binder_mock, dump(_, _))
+            .WillRepeatedly(DoAll(Sleep(timeout_s), WithArg<0>(WriteOnFd(output)), Return(0)));
+    }
+
+    void CallMain(const std::vector<std::string>& args) {
+        const char* argv[1024] = {"/some/virtual/dir/dumpsys"};
+        int argc = (int)args.size() + 1;
+        int i = 1;
+        for (const std::string& arg : args) {
+            argv[i++] = arg.c_str();
+        }
+        CaptureStdout();
+        CaptureStderr();
+        int status = dump_.main(argc, const_cast<char**>(argv));
+        stdout_ = GetCapturedStdout();
+        stderr_ = GetCapturedStderr();
+        EXPECT_THAT(status, Eq(0));
+    }
+
+    void AssertRunningServices(const std::vector<std::string>& services) {
+        std::string expected("Currently running services:\n");
+        for (const std::string& service : services) {
+            expected.append("  ").append(service).append("\n");
+        }
+        EXPECT_THAT(stdout_, HasSubstr(expected));
+    }
+
+    void AssertOutput(const std::string& expected) {
+        EXPECT_THAT(stdout_, StrEq(expected));
+    }
+
+    void AssertOutputContains(const std::string& expected) {
+        EXPECT_THAT(stdout_, HasSubstr(expected));
+    }
+
+    void AssertDumped(const std::string& service, const std::string& dump) {
+        EXPECT_THAT(stdout_, HasSubstr("DUMP OF SERVICE " + service + ":\n" + dump));
+    }
+
+    void AssertNotDumped(const std::string& dump) {
+        EXPECT_THAT(stdout_, Not(HasSubstr(dump)));
+    }
+
+    void AssertStopped(const std::string& service) {
+        EXPECT_THAT(stderr_, HasSubstr("Can't find service: " + service + "\n"));
+    }
+
+    ServiceManagerMock sm_;
+    Dumpsys dump_;
+
+  private:
+    std::string stdout_, stderr_;
+};
+
+// Tests 'dumpsys -l' when all services are running
+TEST_F(DumpsysTest, ListAllServices) {
+    ExpectListServices({"Locksmith", "Valet"});
+    ExpectCheckService("Locksmith");
+    ExpectCheckService("Valet");
+
+    CallMain({"-l"});
+
+    AssertRunningServices({"Locksmith", "Valet"});
+}
+
+// Tests 'dumpsys -l' when a service is not running
+TEST_F(DumpsysTest, ListRunningServices) {
+    ExpectListServices({"Locksmith", "Valet"});
+    ExpectCheckService("Locksmith");
+    ExpectCheckService("Valet", false);
+
+    CallMain({"-l"});
+
+    AssertRunningServices({"Locksmith"});
+    AssertNotDumped({"Valet"});
+}
+
+// Tests 'dumpsys service_name' on a service is running
+TEST_F(DumpsysTest, DumpRunningService) {
+    ExpectDump("Valet", "Here's your car");
+
+    CallMain({"Valet"});
+
+    AssertOutput("Here's your car");
+}
+
+// Tests 'dumpsys -t 1 service_name' on a service that times out after 2s
+TEST_F(DumpsysTest, DumpRunningServiceTimeout) {
+    ExpectDumpAndHang("Valet", 2, "Here's your car");
+
+    CallMain({"-t", "1", "Valet"});
+
+    AssertOutputContains("SERVICE 'Valet' DUMP TIMEOUT (1s) EXPIRED");
+    AssertNotDumped("Here's your car");
+
+    // Must wait so binder mock is deleted, otherwise test will fail with a leaked object
+    sleep(1);
+}
+
+// Tests 'dumpsys service_name Y U NO HAVE ARGS' on a service that is running
+TEST_F(DumpsysTest, DumpWithArgsRunningService) {
+    ExpectDumpWithArgs("SERVICE", {"Y", "U", "NO", "HANDLE", "ARGS"}, "I DO!");
+
+    CallMain({"SERVICE", "Y", "U", "NO", "HANDLE", "ARGS"});
+
+    AssertOutput("I DO!");
+}
+
+// Tests 'dumpsys' with no arguments
+TEST_F(DumpsysTest, DumpMultipleServices) {
+    ExpectListServices({"running1", "stopped2", "running3"});
+    ExpectDump("running1", "dump1");
+    ExpectCheckService("stopped2", false);
+    ExpectDump("running3", "dump3");
+
+    CallMain({});
+
+    AssertRunningServices({"running1", "running3"});
+    AssertDumped("running1", "dump1");
+    AssertStopped("stopped2");
+    AssertDumped("running3", "dump3");
+}
+
+// Tests 'dumpsys --skip skipped3 skipped5', which should skip these services
+TEST_F(DumpsysTest, DumpWithSkip) {
+    ExpectListServices({"running1", "stopped2", "skipped3", "running4", "skipped5"});
+    ExpectDump("running1", "dump1");
+    ExpectCheckService("stopped2", false);
+    ExpectDump("skipped3", "dump3");
+    ExpectDump("running4", "dump4");
+    ExpectDump("skipped5", "dump5");
+
+    CallMain({"--skip", "skipped3", "skipped5"});
+
+    AssertRunningServices({"running1", "running4", "skipped3 (skipped)", "skipped5 (skipped)"});
+    AssertDumped("running1", "dump1");
+    AssertDumped("running4", "dump4");
+    AssertStopped("stopped2");
+    AssertNotDumped("dump3");
+    AssertNotDumped("dump5");
+}
diff --git a/cmds/installd/Android.mk b/cmds/installd/Android.mk
index 3ded400..54f6b5f 100644
--- a/cmds/installd/Android.mk
+++ b/cmds/installd/Android.mk
@@ -6,7 +6,6 @@
 
 include $(CLEAR_VARS)
 LOCAL_MODULE := otapreopt
-LOCAL_MODULE_TAGS := optional
 LOCAL_CFLAGS := -Wall -Werror
 
 # Base & ASLR boundaries for boot image creation.
@@ -33,7 +32,6 @@
     libselinux \
 
 LOCAL_STATIC_LIBRARIES := libdiskusage
-LOCAL_ADDITIONAL_DEPENDENCIES += $(LOCAL_PATH)/Android.mk
 LOCAL_CLANG := true
 include $(BUILD_EXECUTABLE)
 
diff --git a/cmds/installd/commands.cpp b/cmds/installd/commands.cpp
index 1d291ca..2df48aa 100644
--- a/cmds/installd/commands.cpp
+++ b/cmds/installd/commands.cpp
@@ -60,6 +60,8 @@
 static constexpr const char* kCpPath = "/system/bin/cp";
 static constexpr const char* kXattrDefault = "user.default";
 
+static constexpr const int MIN_RESTRICTED_HOME_SDK_VERSION = 24; // > M
+
 static constexpr const char* PKG_LIB_POSTFIX = "/lib";
 static constexpr const char* CACHE_DIR_POSTFIX = "/cache";
 static constexpr const char* CODE_CACHE_DIR_POSTFIX = "/code_cache";
@@ -80,8 +82,6 @@
 static constexpr int DEXOPT_PATCHOAT_NEEDED      = 2;
 static constexpr int DEXOPT_SELF_PATCHOAT_NEEDED = 3;
 
-#define MIN_RESTRICTED_HOME_SDK_VERSION 24 // > M
-
 typedef int fd_t;
 
 static bool property_get_bool(const char* property_name, bool default_value = false) {
diff --git a/cmds/surfacereplayer/proto/Android.mk b/cmds/surfacereplayer/proto/Android.mk
new file mode 100644
index 0000000..b87d34f
--- /dev/null
+++ b/cmds/surfacereplayer/proto/Android.mk
@@ -0,0 +1,31 @@
+#
+# Copyright (C) 2016 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := $(call all-proto-files-under, src)
+
+LOCAL_SHARED_LIBRARIES := \
+    libprotobuf-cpp-full
+
+LOCAL_PROTOC_OPTIMIZE_TYPE := full
+
+LOCAL_MODULE := libtrace_proto
+LOCAL_MODULE_CLASS := STATIC_LIBRARIES
+
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)
+
+include $(BUILD_STATIC_LIBRARY)
diff --git a/cmds/surfacereplayer/proto/src/trace.proto b/cmds/surfacereplayer/proto/src/trace.proto
new file mode 100644
index 0000000..45060af
--- /dev/null
+++ b/cmds/surfacereplayer/proto/src/trace.proto
@@ -0,0 +1,178 @@
+syntax = "proto2";
+
+message Trace {
+    repeated Increment increment = 1;
+}
+
+message Increment {
+    required int64 time_stamp = 1;
+
+    oneof increment {
+        Transaction        transaction          = 2;
+        SurfaceCreation    surface_creation     = 3;
+        SurfaceDeletion    surface_deletion     = 4;
+        BufferUpdate       buffer_update        = 5;
+        VSyncEvent         vsync_event          = 6;
+        DisplayCreation    display_creation     = 7;
+        DisplayDeletion    display_deletion     = 8;
+        PowerModeUpdate    power_mode_update    = 9;
+    }
+}
+
+message Transaction {
+    repeated SurfaceChange surface_change = 1;
+    repeated DisplayChange display_change = 2;
+
+    required bool synchronous = 3;
+    required bool animation   = 4;
+}
+
+message SurfaceChange {
+    required int32 id = 1;
+
+    oneof SurfaceChange {
+        PositionChange              position                = 2;
+        SizeChange                  size                    = 3;
+        AlphaChange                 alpha                   = 4;
+        LayerChange                 layer                   = 5;
+        CropChange                  crop                    = 6;
+        FinalCropChange             final_crop              = 7;
+        MatrixChange                matrix                  = 8;
+        OverrideScalingModeChange   override_scaling_mode   = 9;
+        TransparentRegionHintChange transparent_region_hint = 10;
+        LayerStackChange            layer_stack             = 11;
+        HiddenFlagChange            hidden_flag             = 12;
+        OpaqueFlagChange            opaque_flag             = 13;
+        SecureFlagChange            secure_flag             = 14;
+        DeferredTransactionChange   deferred_transaction    = 15;
+    }
+}
+
+message PositionChange {
+    required float x = 1;
+    required float y = 2;
+}
+
+message SizeChange {
+    required uint32 w = 1;
+    required uint32 h = 2;
+}
+
+message AlphaChange {
+    required float alpha = 1;
+}
+
+message LayerChange {
+    required uint32 layer = 1;
+}
+
+message CropChange {
+    required Rectangle rectangle = 1;
+}
+
+message FinalCropChange {
+    required Rectangle rectangle = 1;
+}
+
+message MatrixChange {
+    required float dsdx = 1;
+    required float dtdx = 2;
+    required float dsdy = 3;
+    required float dtdy = 4;
+}
+
+message OverrideScalingModeChange {
+    required int32 override_scaling_mode = 1;
+}
+
+message TransparentRegionHintChange {
+    repeated Rectangle region = 1;
+}
+
+message LayerStackChange {
+    required uint32 layer_stack = 1;
+}
+
+message HiddenFlagChange {
+    required bool hidden_flag = 1;
+}
+
+message OpaqueFlagChange {
+    required bool opaque_flag = 1;
+}
+
+message SecureFlagChange {
+    required bool secure_flag = 1;
+}
+
+message DeferredTransactionChange {
+    required int32  layer_id     = 1;
+    required uint64 frame_number = 2;
+}
+
+message DisplayChange {
+    required int32 id = 1;
+
+    oneof DisplayChange {
+        DispSurfaceChange surface     = 2;
+        LayerStackChange  layer_stack = 3;
+        SizeChange        size        = 4;
+        ProjectionChange  projection  = 5;
+    }
+}
+
+message DispSurfaceChange {
+    required uint64 buffer_queue_id   = 1;
+    required string buffer_queue_name = 2;
+}
+
+message ProjectionChange {
+    required int32     orientation = 1;
+    required Rectangle viewport    = 2;
+    required Rectangle frame       = 3;
+}
+
+message Rectangle {
+    required int32 left   = 1;
+    required int32 top    = 2;
+    required int32 right  = 3;
+    required int32 bottom = 4;
+}
+
+message SurfaceCreation {
+    required int32  id   = 1;
+    required string name = 2;
+    required uint32 w    = 3;
+    required uint32 h    = 4;
+}
+
+message SurfaceDeletion {
+    required int32 id = 1;
+}
+
+message BufferUpdate {
+    required int32  id           = 1;
+    required uint32 w            = 2;
+    required uint32 h            = 3;
+    required uint64 frame_number = 4;
+}
+
+message VSyncEvent {
+    required int64 when = 1;
+}
+
+message DisplayCreation {
+    required int32     id                = 1;
+    required string    name              = 2;
+    required int32     type              = 3;
+    required bool      is_secure         = 4;
+}
+
+message DisplayDeletion {
+    required int32 id = 1;
+}
+
+message PowerModeUpdate {
+    required int32  id   = 1;
+    required int32  mode = 2;
+}
diff --git a/cmds/surfacereplayer/replayer/Android.mk b/cmds/surfacereplayer/replayer/Android.mk
new file mode 100644
index 0000000..dac4314
--- /dev/null
+++ b/cmds/surfacereplayer/replayer/Android.mk
@@ -0,0 +1,72 @@
+# Copyright 2016 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+LOCAL_TARGET_DIR := $(TARGET_OUT_DATA)/local/tmp
+
+LOCAL_PATH:= $(call my-dir)
+
+include $(call first-makefiles-under, /frameworks/native/cmds/surfacereplayer/proto)
+
+include $(CLEAR_VARS)
+
+LOCAL_CPPFLAGS := -Weverything -Werror
+LOCAL_CPPFLAGS := -Wno-unused-parameter
+LOCAL_CPPFLAGS := -Wno-format
+
+LOCAL_MODULE := libsurfacereplayer
+
+LOCAL_SRC_FILES := \
+    BufferQueueScheduler.cpp \
+    Event.cpp \
+    Replayer.cpp \
+
+LOCAL_SHARED_LIBRARIES := \
+    libEGL \
+    libGLESv2 \
+    libbinder \
+    liblog \
+    libcutils \
+    libgui \
+    libui \
+    libutils \
+    libprotobuf-cpp-full \
+
+LOCAL_STATIC_LIBRARIES := \
+    libtrace_proto \
+
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/..
+
+include $(BUILD_SHARED_LIBRARY)
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := surfacereplayer
+
+LOCAL_SRC_FILES := \
+    Main.cpp \
+
+LOCAL_SHARED_LIBRARIES := \
+    libprotobuf-cpp-full \
+    libsurfacereplayer \
+    libutils \
+
+LOCAL_STATIC_LIBRARIES := \
+    libtrace_proto \
+
+LOCAL_CPPFLAGS := -Weverything -Werror
+LOCAL_CPPFLAGS := -Wno-unused-parameter
+
+LOCAL_MODULE_PATH := $(LOCAL_TARGET_DIR)
+
+include $(BUILD_EXECUTABLE)
diff --git a/cmds/surfacereplayer/replayer/BufferQueueScheduler.cpp b/cmds/surfacereplayer/replayer/BufferQueueScheduler.cpp
new file mode 100644
index 0000000..77de8dc
--- /dev/null
+++ b/cmds/surfacereplayer/replayer/BufferQueueScheduler.cpp
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#define LOG_TAG "BufferQueueScheduler"
+
+#include "BufferQueueScheduler.h"
+
+#include <android/native_window.h>
+#include <gui/Surface.h>
+
+using namespace android;
+
+BufferQueueScheduler::BufferQueueScheduler(
+        const sp<SurfaceControl>& surfaceControl, const HSV& color, int id)
+      : mSurfaceControl(surfaceControl), mColor(color), mSurfaceId(id), mContinueScheduling(true) {}
+
+void BufferQueueScheduler::startScheduling() {
+    ALOGV("Starting Scheduler for %d Layer", mSurfaceId);
+    std::unique_lock<std::mutex> lock(mMutex);
+    if (mSurfaceControl == nullptr) {
+        mCondition.wait(lock, [&] { return (mSurfaceControl != nullptr); });
+    }
+
+    while (mContinueScheduling) {
+        while (true) {
+            if (mBufferEvents.empty()) {
+                break;
+            }
+
+            BufferEvent event = mBufferEvents.front();
+            lock.unlock();
+
+            bufferUpdate(event.dimensions);
+            fillSurface(event.event);
+            mColor.modulate();
+            lock.lock();
+            mBufferEvents.pop();
+        }
+        mCondition.wait(lock);
+    }
+}
+
+void BufferQueueScheduler::addEvent(const BufferEvent& event) {
+    std::lock_guard<std::mutex> lock(mMutex);
+    mBufferEvents.push(event);
+    mCondition.notify_one();
+}
+
+void BufferQueueScheduler::stopScheduling() {
+    std::lock_guard<std::mutex> lock(mMutex);
+    mContinueScheduling = false;
+    mCondition.notify_one();
+}
+
+void BufferQueueScheduler::setSurfaceControl(
+        const sp<SurfaceControl>& surfaceControl, const HSV& color) {
+    std::lock_guard<std::mutex> lock(mMutex);
+    mSurfaceControl = surfaceControl;
+    mColor = color;
+    mCondition.notify_one();
+}
+
+void BufferQueueScheduler::bufferUpdate(const Dimensions& dimensions) {
+    sp<Surface> s = mSurfaceControl->getSurface();
+    s->setBuffersDimensions(dimensions.width, dimensions.height);
+}
+
+void BufferQueueScheduler::fillSurface(const std::shared_ptr<Event>& event) {
+    ANativeWindow_Buffer outBuffer;
+    sp<Surface> s = mSurfaceControl->getSurface();
+
+    status_t status = s->lock(&outBuffer, nullptr);
+
+    if (status != NO_ERROR) {
+        ALOGE("fillSurface: failed to lock buffer, (%d)", status);
+        return;
+    }
+
+    auto color = mColor.getRGB();
+
+    auto img = reinterpret_cast<uint8_t*>(outBuffer.bits);
+    for (int y = 0; y < outBuffer.height; y++) {
+        for (int x = 0; x < outBuffer.width; x++) {
+            uint8_t* pixel = img + (4 * (y * outBuffer.stride + x));
+            pixel[0] = color.r;
+            pixel[1] = color.g;
+            pixel[2] = color.b;
+            pixel[3] = LAYER_ALPHA;
+        }
+    }
+
+    event->readyToExecute();
+
+    status = s->unlockAndPost();
+
+    ALOGE_IF(status != NO_ERROR, "fillSurface: failed to unlock and post buffer, (%d)", status);
+}
diff --git a/cmds/surfacereplayer/replayer/BufferQueueScheduler.h b/cmds/surfacereplayer/replayer/BufferQueueScheduler.h
new file mode 100644
index 0000000..cb20fcc
--- /dev/null
+++ b/cmds/surfacereplayer/replayer/BufferQueueScheduler.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_SURFACEREPLAYER_BUFFERQUEUESCHEDULER_H
+#define ANDROID_SURFACEREPLAYER_BUFFERQUEUESCHEDULER_H
+
+#include "Color.h"
+#include "Event.h"
+
+#include <gui/SurfaceControl.h>
+
+#include <utils/StrongPointer.h>
+
+#include <atomic>
+#include <condition_variable>
+#include <mutex>
+#include <queue>
+#include <utility>
+
+namespace android {
+
+auto constexpr LAYER_ALPHA = 190;
+
+struct Dimensions {
+    Dimensions() = default;
+    Dimensions(int w, int h) : width(w), height(h) {}
+
+    int width = 0;
+    int height = 0;
+};
+
+struct BufferEvent {
+    BufferEvent() = default;
+    BufferEvent(std::shared_ptr<Event> e, Dimensions d) : event(e), dimensions(d) {}
+
+    std::shared_ptr<Event> event;
+    Dimensions dimensions;
+};
+
+class BufferQueueScheduler {
+  public:
+    BufferQueueScheduler(const sp<SurfaceControl>& surfaceControl, const HSV& color, int id);
+
+    void startScheduling();
+    void addEvent(const BufferEvent&);
+    void stopScheduling();
+
+    void setSurfaceControl(const sp<SurfaceControl>& surfaceControl, const HSV& color);
+
+  private:
+    void bufferUpdate(const Dimensions& dimensions);
+
+    // Lock and fill the surface, block until the event is signaled by the main loop,
+    // then unlock and post the buffer.
+    void fillSurface(const std::shared_ptr<Event>& event);
+
+    sp<SurfaceControl> mSurfaceControl;
+    HSV mColor;
+    const int mSurfaceId;
+
+    bool mContinueScheduling;
+
+    std::queue<BufferEvent> mBufferEvents;
+    std::mutex mMutex;
+    std::condition_variable mCondition;
+};
+
+}  // namespace android
+#endif
diff --git a/cmds/surfacereplayer/replayer/Color.h b/cmds/surfacereplayer/replayer/Color.h
new file mode 100644
index 0000000..ce644be
--- /dev/null
+++ b/cmds/surfacereplayer/replayer/Color.h
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_SURFACEREPLAYER_COLOR_H
+#define ANDROID_SURFACEREPLAYER_COLOR_H
+
+#include <cmath>
+#include <cstdlib>
+
+namespace android {
+
+constexpr double modulateFactor = .0001;
+constexpr double modulateLimit = .80;
+
+struct RGB {
+    RGB(uint8_t rIn, uint8_t gIn, uint8_t bIn) : r(rIn), g(gIn), b(bIn) {}
+
+    uint8_t r = 0;
+    uint8_t g = 0;
+    uint8_t b = 0;
+};
+
+struct HSV {
+    HSV() = default;
+    HSV(double hIn, double sIn, double vIn) : h(hIn), s(sIn), v(vIn) {}
+
+    double h = 0;
+    double s = 0;
+    double v = 0;
+
+    RGB getRGB() const;
+
+    bool modulateUp = false;
+
+    void modulate();
+};
+
+void inline HSV::modulate() {
+    if(modulateUp) {
+        v += modulateFactor;
+    } else {
+        v -= modulateFactor;
+    }
+
+    if(v <= modulateLimit || v >= 1) {
+        modulateUp = !modulateUp;
+    }
+}
+
+inline RGB HSV::getRGB() const {
+    using namespace std;
+    double r = 0, g = 0, b = 0;
+
+    if (s == 0) {
+        r = v;
+        g = v;
+        b = v;
+    } else {
+        auto tempHue = static_cast<int>(h) % 360;
+        tempHue = tempHue / 60;
+
+        int i = static_cast<int>(trunc(tempHue));
+        double f = h - i;
+
+        double x = v * (1.0 - s);
+        double y = v * (1.0 - (s * f));
+        double z = v * (1.0 - (s * (1.0 - f)));
+
+        switch (i) {
+            case 0:
+                r = v;
+                g = z;
+                b = x;
+                break;
+
+            case 1:
+                r = y;
+                g = v;
+                b = x;
+                break;
+
+            case 2:
+                r = x;
+                g = v;
+                b = z;
+                break;
+
+            case 3:
+                r = x;
+                g = y;
+                b = v;
+                break;
+
+            case 4:
+                r = z;
+                g = x;
+                b = v;
+                break;
+
+            default:
+                r = v;
+                g = x;
+                b = y;
+                break;
+        }
+    }
+
+    return RGB(round(r * 255), round(g * 255), round(b * 255));
+}
+}
+#endif
diff --git a/cmds/surfacereplayer/replayer/Event.cpp b/cmds/surfacereplayer/replayer/Event.cpp
new file mode 100644
index 0000000..390d398
--- /dev/null
+++ b/cmds/surfacereplayer/replayer/Event.cpp
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "Event.h"
+
+using namespace android;
+
+Event::Event(Increment::IncrementCase type) : mIncrementType(type) {}
+
+void Event::readyToExecute() {
+    changeState(Event::EventState::Waiting);
+    waitUntil(Event::EventState::Signaled);
+    changeState(Event::EventState::Running);
+}
+
+void Event::complete() {
+    waitUntil(Event::EventState::Waiting);
+    changeState(Event::EventState::Signaled);
+    waitUntil(Event::EventState::Running);
+}
+
+void Event::waitUntil(Event::EventState state) {
+    std::unique_lock<std::mutex> lock(mLock);
+    mCond.wait(lock, [this, state] { return (mState == state); });
+}
+
+void Event::changeState(Event::EventState state) {
+    std::unique_lock<std::mutex> lock(mLock);
+    mState = state;
+    lock.unlock();
+
+    mCond.notify_one();
+}
+
+Increment::IncrementCase Event::getIncrementType() {
+    return mIncrementType;
+}
diff --git a/cmds/surfacereplayer/replayer/Event.h b/cmds/surfacereplayer/replayer/Event.h
new file mode 100644
index 0000000..44b60f5
--- /dev/null
+++ b/cmds/surfacereplayer/replayer/Event.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_SURFACEREPLAYER_EVENT_H
+#define ANDROID_SURFACEREPLAYER_EVENT_H
+
+#include <frameworks/native/cmds/surfacereplayer/proto/src/trace.pb.h>
+
+#include <condition_variable>
+#include <mutex>
+
+namespace android {
+
+class Event {
+  public:
+    Event(Increment::IncrementCase);
+
+    enum class EventState {
+        SettingUp,  // Completing as much time-independent work as possible
+        Waiting,    // Waiting for signal from main thread to finish execution
+        Signaled,   // Signaled by main thread, about to immediately switch to Running
+        Running     // Finishing execution of rest of work
+    };
+
+    void readyToExecute();
+    void complete();
+
+    Increment::IncrementCase getIncrementType();
+
+  private:
+    void waitUntil(EventState state);
+    void changeState(EventState state);
+
+    std::mutex mLock;
+    std::condition_variable mCond;
+
+    EventState mState = EventState::SettingUp;
+
+    Increment::IncrementCase mIncrementType;
+};
+}
+#endif
diff --git a/cmds/surfacereplayer/replayer/Main.cpp b/cmds/surfacereplayer/replayer/Main.cpp
new file mode 100644
index 0000000..dd1dd7d
--- /dev/null
+++ b/cmds/surfacereplayer/replayer/Main.cpp
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * Replayer - Main.cpp
+ *
+ * 1. Get flags from command line
+ * 2. Commit actions or settings based on the flags
+ * 3. Initalize a replayer object with the filename passed in
+ * 4. Replay
+ * 5. Exit successfully or print error statement
+ */
+
+#include <replayer/Replayer.h>
+
+#include <csignal>
+#include <iostream>
+#include <stdlib.h>
+#include <unistd.h>
+
+using namespace android;
+
+void printHelpMenu() {
+    std::cout << "SurfaceReplayer options:\n";
+    std::cout << "Usage: surfacereplayer [OPTIONS...] <TRACE FILE>\n";
+    std::cout << "  File path must be absolute" << std::endl << std::endl;
+
+    std::cout << "  -m  Stops the replayer at the start of the trace and switches ";
+                 "to manual replay\n";
+
+    std::cout << "\n  -t [Number of Threads]  Specifies the number of threads to be used while "
+                 "replaying (default is " << android::DEFAULT_THREADS << ")\n";
+
+    std::cout << "\n  -s [Timestamp]  Specify at what timestamp should the replayer switch "
+                 "to manual replay\n";
+
+    std::cout << "  -n  Ignore timestamps and run through trace as fast as possible\n";
+
+    std::cout << "  -l  Indefinitely loop the replayer\n";
+
+    std::cout << "  -h  Display help menu\n";
+
+    std::cout << std::endl;
+}
+
+int main(int argc, char** argv) {
+    std::string filename;
+    bool loop = false;
+    bool wait = true;
+    bool pauseBeginning = false;
+    int numThreads = DEFAULT_THREADS;
+    long stopHere = -1;
+
+    int opt = 0;
+    while ((opt = getopt(argc, argv, "mt:s:nlh?")) != -1) {
+        switch (opt) {
+            case 'm':
+                pauseBeginning = true;
+                break;
+            case 't':
+                numThreads = atoi(optarg);
+                break;
+            case 's':
+                stopHere = atol(optarg);
+                break;
+            case 'n':
+                wait = false;
+                break;
+            case 'l':
+                loop = true;
+                break;
+            case 'h':
+            case '?':
+                printHelpMenu();
+                exit(0);
+            default:
+                std::cerr << "Invalid argument...exiting" << std::endl;
+                printHelpMenu();
+                exit(0);
+        }
+    }
+
+    char** input = argv + optind;
+    if (input[0] == NULL) {
+        std::cerr << "No trace file provided...exiting" << std::endl;
+        abort();
+    }
+    filename.assign(input[0]);
+
+    status_t status = NO_ERROR;
+    do {
+        android::Replayer r(filename, pauseBeginning, numThreads, wait, stopHere);
+        status = r.replay();
+    } while(loop);
+
+    if (status == NO_ERROR) {
+        std::cout << "Successfully finished replaying trace" << std::endl;
+    } else {
+        std::cerr << "Trace replayer returned error: " << status << std::endl;
+    }
+
+    return 0;
+}
diff --git a/cmds/surfacereplayer/replayer/README.md b/cmds/surfacereplayer/replayer/README.md
new file mode 100644
index 0000000..893f0dc
--- /dev/null
+++ b/cmds/surfacereplayer/replayer/README.md
@@ -0,0 +1,262 @@
+SurfaceReplayer Documentation
+===================
+
+[go/SurfaceReplayer](go/SurfaceReplayer)
+
+SurfaceReplayer is a playback mechanism that allows the replaying of traces recorded by
+[SurfaceInterceptor](go/SurfaceInterceptor) from SurfaceFlinger. It specifically replays
+
+* Creation and deletion of surfaces/displays
+* Alterations to the surfaces/displays called Transactions
+* Buffer Updates to surfaces
+* VSync events
+
+At their specified times to be as close to the original trace.
+
+Usage
+--------
+
+###Creating a trace
+
+SurfaceInterceptor is the mechanism used to create traces. The device needs to be rooted in order to
+utilize it. To allow it to write to the device, run
+
+`setenforce 0`
+
+To start recording a trace, run
+
+`service call SurfaceFlinger 1020 i32 1`
+
+To stop recording, run
+
+`service call SurfaceFlinger 1020 i32 0`
+
+The default location for the trace is `/data/SurfaceTrace.dat`
+
+###Executable
+
+To replay a specific trace, execute
+
+`/data/local/tmp/surfacereplayer /absolute/path/to/trace`
+
+inside the android shell. This will replay the full trace and then exit. Running this command
+outside of the shell by prepending `adb shell` will not allow for manual control and will not turn
+off VSync injections if it interrupted in any way other than fully replaying the trace
+
+The replay will not fill surfaces with their contents during the capture. Rather they are given a
+random color which will be the same every time the trace is replayed. Surfaces modulate their color
+at buffer updates.
+
+**Options:**
+
+- -m    pause the replayer at the start of the trace for manual replay
+- -t [Number of Threads] uses specified number of threads to queue up actions (default is 3)
+- -s [Timestamp] switches to manual replay at specified timestamp
+- -n    Ignore timestamps and run through trace as fast as possible
+- -l    Indefinitely loop the replayer
+- -h    displays help menu
+
+**Manual Replay:**
+When replaying, if the user presses CTRL-C, the replay will stop and can be manually controlled
+by the user. Pressing CTRL-C again will exit the replayer.
+
+Manual replaying is similar to debugging in gdb. A prompt is presented and the user is able to
+input commands to choose how to proceed by hitting enter after inputting a command. Pressing enter
+without inputting a command repeats the previous command.
+
+- n  - steps the replayer to the next VSync event
+- ni - steps the replayer to the next increment
+- c  - continues normal replaying
+- c [milliseconds] - continue until specified number of milliseconds have passed
+- s [timestamp]    - continue and stop at specified timestamp
+- l  - list out timestamp of current increment
+- h  - displays help menu
+
+###Shared Library
+
+To use the shared library include these shared libraries
+
+`libsurfacereplayer`
+`libprotobuf-cpp-full`
+`libutils`
+
+And the static library
+
+`libtrace_proto`
+
+Include the replayer header at the top of your file
+
+`#include <replayer/Replayer.h>`
+
+There are two constructors for the replayer
+
+`Replayer(std::string& filename, bool replayManually, int numThreads, bool wait, nsecs_t stopHere)`
+`Replayer(Trace& trace, ... ditto ...)`
+
+The first constructor takes in the filepath where the trace is located and loads in the trace
+object internally.
+- replayManually - **True**: if the replayer will immediately switch to manual replay at the start
+- numThreads - Number of worker threads the replayer will use.
+- wait - **False**: Replayer ignores waits in between increments
+- stopHere - Time stamp of where the replayer should run to then switch to manual replay
+
+The second constructor includes all of the same parameters but takes in a preloaded trace object.
+To use add
+
+`#include <frameworks/native/cmds/surfacereplayer/proto/src/trace.pb.h>`
+
+To your file
+
+After initializing the Replayer call
+
+    replayer.replay();
+
+And the trace will start replaying. Once the trace is finished replaying, the function will return.
+The layers that are visible at the end of the trace will remain on screen until the program
+terminates.
+
+
+**If VSyncs are broken after running the replayer** that means `enableVSyncInjections(false)` was
+never executed. This can be fixed by executing
+
+`service call SurfaceFlinger 23 i32 0`
+
+in the android shell
+
+Code Breakdown
+-------------
+
+The Replayer is composed of 5 components.
+
+- The data format of the trace (Trace.proto)
+- The Replayer object (Replayer.cpp)
+- The synchronization mechanism to signal threads within the Replayer (Event.cpp)
+- The scheduler for buffer updates per surface (BufferQueueScheduler.cpp)
+- The Main executable (Main.cpp)
+
+### Traces
+
+Traces are represented as a protobuf message located in surfacereplayer/proto/src.
+
+**Traces** contain *repeated* **Increments** (events that have occurred in SurfaceFlinger).
+**Increments** contain the time stamp of when it occurred and a *oneof* which can be a
+
+ - Transaction
+ - SurfaceCreation
+ - SurfaceDeletion
+ - DisplayCreation
+ - DisplayDeleteion
+ - BufferUpdate
+ - VSyncEvent
+ - PowerModeUpdate
+
+**Transactions** contain whether the transaction was synchronous or animated and *repeated*
+**SurfaceChanges** and **DisplayChanges**
+
+- **SurfaceChanges** contain an id of the surface being manipulated and can be changes such as
+position, alpha, hidden, size, etc.
+- **DisplayChanges** contain the id of the display being manipulated and can be changes such as
+size, layer stack, projection, etc.
+
+**Surface/Display Creation** contain the id of the surface/display and the name of the
+surface/display
+
+**Surface/Display Deletion** contain the id of the surface/display to be deleted
+
+**Buffer Updates** contain the id of the surface who's buffer is being updated, the size of the
+buffer, and the frame number.
+
+**VSyncEvents** contain when the VSync event has occurred.
+
+**PowerModeUpdates** contain the id of the display being updated and what mode it is being
+changed to.
+
+To output the contents of a trace in a readable format, execute
+
+`**aprotoc** --decode=Trace \
+-I=$ANDROID_BUILD_TOP/frameworks/native/cmds/surfacereplayer/proto/src \
+$ANDROID_BUILD_TOP/frameworks/native/cmds/surfacereplayer/proto/src/trace.proto \
+ < **YourTraceFile.dat** > **YourOutputName.txt**`
+
+
+###Replayer
+
+Fundamentally the replayer loads a trace and iterates through each increment, waiting the required
+amount of time until the increment should be executed, then executing the increment. The first
+increment in a trace does not start at 0, rather the replayer treats its time stamp as time 0 and
+goes from there.
+
+Increments from the trace are played asynchronously rather than one by one, being dispatched by
+the main thread, queued up in a thread pool and completed when the main thread deems they are
+ready to finish execution.
+
+When an increment is dispatched, it completes as much work as it can before it has to be
+synchronized (e.g. prebaking a buffer for a BufferUpdate). When it gets to a critical action
+(e.g. locking and pushing a buffer), it waits for the main thread to complete it using an Event
+object. The main thread holds a queue of these Event objects and completes the
+corresponding Event base on its time stamp. After completing an increment, the main thread will
+dispatch another increment and continue.
+
+The main thread's execution flow is outlined below
+
+    initReplay() //queue up the initial increments
+    while(!pendingIncrements.empty()) { //while increments remaining
+        event = pendingIncrement.pop();
+        wait(event.time_stamp(); //waitUntil it is time to complete this increment
+
+        event.complete() //signal to let event finish
+        if(increments remaing()) {
+            dispatchEvent() //queue up another increment
+        }
+    }
+
+A worker thread's flow looks like so
+
+    //dispatched!
+    Execute non-time sensitive work here
+    ...
+    event.readyToExecute() //time sensitive point...waiting for Main Thread
+    ...
+    Finish execution
+
+
+### Event
+
+An Event is a simple synchronization mechanism used to facilitate communication between the main
+and worker threads. Every time an increment is dispatched, an Event object is also created.
+
+An Event can be in 4 different states:
+
+- **SettingUp** - The worker is in the process of completing all non-time sensitive work
+- **Waiting** - The worker is waiting on the main thread to signal it.
+- **Signaled** - The worker has just been signaled by the main thread
+- **Running** - The worker is running again and finishing the rest of its work.
+
+When the main thread wants to finish the execution of a worker, the worker can either still be
+**SettingUp**, in which the main thread will wait, or the worker will be **Waiting**, in which the
+main thread will **Signal** it to complete. The worker thread changes itself to the **Running**
+state once **Signaled**. This last step exists in order to communicate back to the main thread that
+the worker thread has actually started completing its execution, rather than being preempted right
+after signalling. Once this happens, the main thread schedules the next worker. This makes sure
+there is a constant amount of workers running at one time.
+
+This activity is encapsulated in the `readyToExecute()` and `complete()` functions called by the
+worker and main thread respectively.
+
+### BufferQueueScheduler
+
+During a **BuferUpdate**, the worker thread will wait until **Signaled** to unlock and post a
+buffer that has been prefilled during the **SettingUp** phase. However if there are two sequential
+**BufferUpdates** that act on the same surface, both threads will try to lock a buffer and fill it,
+which isn't possible and will cause a deadlock. The BufferQueueScheduler solves this problem by
+handling when **BufferUpdates** should be scheduled, making sure that they don't overlap.
+
+When a surface is created, a BufferQueueScheduler is also created along side it. Whenever a
+**BufferUpdate** is read, it schedules the event onto its own internal queue and then schedules one
+every time an Event is completed.
+
+### Main
+
+The main exectuable reads in the command line arguments. Creates the Replayer using those
+arguments. Executes `replay()` on the Replayer. If there are no errors while replaying it will exit
+gracefully, if there are then it will report the error and then exit.
diff --git a/cmds/surfacereplayer/replayer/Replayer.cpp b/cmds/surfacereplayer/replayer/Replayer.cpp
new file mode 100644
index 0000000..ace10d1
--- /dev/null
+++ b/cmds/surfacereplayer/replayer/Replayer.cpp
@@ -0,0 +1,698 @@
+/* Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "SurfaceReplayer"
+
+#include "Replayer.h"
+
+#include <android/native_window.h>
+
+#include <binder/IMemory.h>
+
+#include <gui/BufferQueue.h>
+#include <gui/ISurfaceComposer.h>
+#include <gui/Surface.h>
+#include <private/gui/ComposerService.h>
+#include <private/gui/LayerState.h>
+
+#include <ui/DisplayInfo.h>
+#include <utils/Log.h>
+#include <utils/String8.h>
+#include <utils/Trace.h>
+
+#include <chrono>
+#include <cmath>
+#include <condition_variable>
+#include <cstdlib>
+#include <fstream>
+#include <functional>
+#include <iostream>
+#include <mutex>
+#include <sstream>
+#include <string>
+#include <thread>
+#include <vector>
+
+using namespace android;
+
+std::atomic_bool Replayer::sReplayingManually(false);
+
+Replayer::Replayer(const std::string& filename, bool replayManually, int numThreads, bool wait,
+        nsecs_t stopHere)
+      : mTrace(),
+        mLoaded(false),
+        mIncrementIndex(0),
+        mCurrentTime(0),
+        mNumThreads(numThreads),
+        mWaitForTimeStamps(wait),
+        mStopTimeStamp(stopHere) {
+    srand(RAND_COLOR_SEED);
+
+    std::fstream input(filename, std::ios::in | std::ios::binary);
+
+    mLoaded = mTrace.ParseFromIstream(&input);
+    if (!mLoaded) {
+        std::cerr << "Trace did not load. Does " << filename << " exist?" << std::endl;
+        abort();
+    }
+
+    mCurrentTime = mTrace.increment(0).time_stamp();
+
+    sReplayingManually.store(replayManually);
+
+    if (stopHere < 0) {
+        mHasStopped = true;
+    }
+}
+
+Replayer::Replayer(const Trace& t, bool replayManually, int numThreads, bool wait, nsecs_t stopHere)
+      : mTrace(t),
+        mLoaded(true),
+        mIncrementIndex(0),
+        mCurrentTime(0),
+        mNumThreads(numThreads),
+        mWaitForTimeStamps(wait),
+        mStopTimeStamp(stopHere) {
+    srand(RAND_COLOR_SEED);
+    mCurrentTime = mTrace.increment(0).time_stamp();
+
+    sReplayingManually.store(replayManually);
+
+    if (stopHere < 0) {
+        mHasStopped = true;
+    }
+}
+
+status_t Replayer::replay() {
+    signal(SIGINT, Replayer::stopAutoReplayHandler); //for manual control
+
+    ALOGV("There are %d increments.", mTrace.increment_size());
+
+    status_t status = loadSurfaceComposerClient();
+
+    if (status != NO_ERROR) {
+        ALOGE("Couldn't create SurfaceComposerClient (%d)", status);
+        return status;
+    }
+
+    SurfaceComposerClient::enableVSyncInjections(true);
+
+    initReplay();
+
+    ALOGV("Starting actual Replay!");
+    while (!mPendingIncrements.empty()) {
+        mCurrentIncrement = mTrace.increment(mIncrementIndex);
+
+        if (mHasStopped == false && mCurrentIncrement.time_stamp() >= mStopTimeStamp) {
+            mHasStopped = true;
+            sReplayingManually.store(true);
+        }
+
+        waitForConsoleCommmand();
+
+        if (mWaitForTimeStamps) {
+            waitUntilTimestamp(mCurrentIncrement.time_stamp());
+        }
+
+        auto event = mPendingIncrements.front();
+        mPendingIncrements.pop();
+
+        event->complete();
+
+        if (event->getIncrementType() == Increment::kVsyncEvent) {
+            mWaitingForNextVSync = false;
+        }
+
+        if (mIncrementIndex + mNumThreads < mTrace.increment_size()) {
+            status = dispatchEvent(mIncrementIndex + mNumThreads);
+
+            if (status != NO_ERROR) {
+                SurfaceComposerClient::enableVSyncInjections(false);
+                return status;
+            }
+        }
+
+        mIncrementIndex++;
+        mCurrentTime = mCurrentIncrement.time_stamp();
+    }
+
+    SurfaceComposerClient::enableVSyncInjections(false);
+
+    return status;
+}
+
+status_t Replayer::initReplay() {
+    for (int i = 0; i < mNumThreads && i < mTrace.increment_size(); i++) {
+        status_t status = dispatchEvent(i);
+
+        if (status != NO_ERROR) {
+            ALOGE("Unable to dispatch event (%d)", status);
+            return status;
+        }
+    }
+
+    return NO_ERROR;
+}
+
+void Replayer::stopAutoReplayHandler(int /*signal*/) {
+    if (sReplayingManually) {
+        SurfaceComposerClient::enableVSyncInjections(false);
+        exit(0);
+    }
+
+    sReplayingManually.store(true);
+}
+
+std::vector<std::string> split(const std::string& s, const char delim) {
+    std::vector<std::string> elems;
+    std::stringstream ss(s);
+    std::string item;
+    while (getline(ss, item, delim)) {
+        elems.push_back(item);
+    }
+    return elems;
+}
+
+bool isNumber(const std::string& s) {
+    return !s.empty() &&
+           std::find_if(s.begin(), s.end(), [](char c) { return !std::isdigit(c); }) == s.end();
+}
+
+void Replayer::waitForConsoleCommmand() {
+    if (!sReplayingManually || mWaitingForNextVSync) {
+        return;
+    }
+
+    while (true) {
+        std::string input = "";
+        std::cout << "> ";
+        getline(std::cin, input);
+
+        if (input.empty()) {
+            input = mLastInput;
+        } else {
+            mLastInput = input;
+        }
+
+        if (mLastInput.empty()) {
+            continue;
+        }
+
+        std::vector<std::string> inputs = split(input, ' ');
+
+        if (inputs[0] == "n") {  // next vsync
+            mWaitingForNextVSync = true;
+            break;
+
+        } else if (inputs[0] == "ni") {  // next increment
+            break;
+
+        } else if (inputs[0] == "c") {  // continue
+            if (inputs.size() > 1 && isNumber(inputs[1])) {
+                long milliseconds = stoi(inputs[1]);
+                std::thread([&] {
+                    std::cout << "Started!" << std::endl;
+                    std::this_thread::sleep_for(std::chrono::milliseconds(milliseconds));
+                    sReplayingManually.store(true);
+                    std::cout << "Should have stopped!" << std::endl;
+                }).detach();
+            }
+            sReplayingManually.store(false);
+            mWaitingForNextVSync = false;
+            break;
+
+        } else if (inputs[0] == "s") {  // stop at this timestamp
+            if (inputs.size() < 1) {
+                std::cout << "No time stamp given" << std::endl;
+                continue;
+            }
+            sReplayingManually.store(false);
+            mStopTimeStamp = stol(inputs[1]);
+            mHasStopped = false;
+            break;
+        } else if (inputs[0] == "l") {  // list
+            std::cout << "Time stamp: " << mCurrentIncrement.time_stamp() << "\n";
+            continue;
+        } else if (inputs[0] == "q") {  // quit
+            SurfaceComposerClient::enableVSyncInjections(false);
+            exit(0);
+
+        } else if (inputs[0] == "h") {  // help
+                                        // add help menu
+            std::cout << "Manual Replay options:\n";
+            std::cout << " n  - Go to next VSync\n";
+            std::cout << " ni - Go to next increment\n";
+            std::cout << " c  - Continue\n";
+            std::cout << " c [milliseconds] - Continue until specified number of milliseconds\n";
+            std::cout << " s [timestamp]    - Continue and stop at specified timestamp\n";
+            std::cout << " l  - List out timestamp of current increment\n";
+            std::cout << " h  - Display help menu\n";
+            std::cout << std::endl;
+            continue;
+        }
+
+        std::cout << "Invalid Command" << std::endl;
+    }
+}
+
+status_t Replayer::dispatchEvent(int index) {
+    auto increment = mTrace.increment(index);
+    std::shared_ptr<Event> event = std::make_shared<Event>(increment.increment_case());
+    mPendingIncrements.push(event);
+
+    status_t status = NO_ERROR;
+    switch (increment.increment_case()) {
+        case increment.kTransaction: {
+            std::thread(&Replayer::doTransaction, this, increment.transaction(), event).detach();
+        } break;
+        case increment.kSurfaceCreation: {
+            std::thread(&Replayer::createSurfaceControl, this, increment.surface_creation(), event)
+                    .detach();
+        } break;
+        case increment.kSurfaceDeletion: {
+            std::thread(&Replayer::deleteSurfaceControl, this, increment.surface_deletion(), event)
+                    .detach();
+        } break;
+        case increment.kBufferUpdate: {
+            std::lock_guard<std::mutex> lock1(mLayerLock);
+            std::lock_guard<std::mutex> lock2(mBufferQueueSchedulerLock);
+
+            Dimensions dimensions(increment.buffer_update().w(), increment.buffer_update().h());
+            BufferEvent bufferEvent(event, dimensions);
+
+            auto layerId = increment.buffer_update().id();
+            if (mBufferQueueSchedulers.count(layerId) == 0) {
+                mBufferQueueSchedulers[layerId] = std::make_shared<BufferQueueScheduler>(
+                        mLayers[layerId], mColors[layerId], layerId);
+                mBufferQueueSchedulers[layerId]->addEvent(bufferEvent);
+
+                std::thread(&BufferQueueScheduler::startScheduling,
+                        mBufferQueueSchedulers[increment.buffer_update().id()].get())
+                        .detach();
+            } else {
+                auto bqs = mBufferQueueSchedulers[increment.buffer_update().id()];
+                bqs->addEvent(bufferEvent);
+            }
+        } break;
+        case increment.kVsyncEvent: {
+            std::thread(&Replayer::injectVSyncEvent, this, increment.vsync_event(), event).detach();
+        } break;
+        case increment.kDisplayCreation: {
+            std::thread(&Replayer::createDisplay, this, increment.display_creation(), event)
+                    .detach();
+        } break;
+        case increment.kDisplayDeletion: {
+            std::thread(&Replayer::deleteDisplay, this, increment.display_deletion(), event)
+                    .detach();
+        } break;
+        case increment.kPowerModeUpdate: {
+            std::thread(&Replayer::updatePowerMode, this, increment.power_mode_update(), event)
+                    .detach();
+        } break;
+        default:
+            ALOGE("Unknown Increment Type: %d", increment.increment_case());
+            status = BAD_VALUE;
+            break;
+    }
+
+    return status;
+}
+
+status_t Replayer::doTransaction(const Transaction& t, const std::shared_ptr<Event>& event) {
+    ALOGV("Started Transaction");
+
+    SurfaceComposerClient::openGlobalTransaction();
+
+    status_t status = NO_ERROR;
+
+    status = doSurfaceTransaction(t.surface_change());
+    doDisplayTransaction(t.display_change());
+
+    if (t.animation()) {
+        SurfaceComposerClient::setAnimationTransaction();
+    }
+
+    event->readyToExecute();
+
+    SurfaceComposerClient::closeGlobalTransaction(t.synchronous());
+
+    ALOGV("Ended Transaction");
+
+    return status;
+}
+
+status_t Replayer::doSurfaceTransaction(const SurfaceChanges& surfaceChanges) {
+    status_t status = NO_ERROR;
+
+    for (const SurfaceChange& change : surfaceChanges) {
+        std::unique_lock<std::mutex> lock(mLayerLock);
+        if (mLayers[change.id()] == nullptr) {
+            mLayerCond.wait(lock, [&] { return (mLayers[change.id()] != nullptr); });
+        }
+
+        switch (change.SurfaceChange_case()) {
+            case SurfaceChange::SurfaceChangeCase::kPosition:
+                status = setPosition(change.id(), change.position());
+                break;
+            case SurfaceChange::SurfaceChangeCase::kSize:
+                status = setSize(change.id(), change.size());
+                break;
+            case SurfaceChange::SurfaceChangeCase::kAlpha:
+                status = setAlpha(change.id(), change.alpha());
+                break;
+            case SurfaceChange::SurfaceChangeCase::kLayer:
+                status = setLayer(change.id(), change.layer());
+                break;
+            case SurfaceChange::SurfaceChangeCase::kCrop:
+                status = setCrop(change.id(), change.crop());
+                break;
+            case SurfaceChange::SurfaceChangeCase::kMatrix:
+                status = setMatrix(change.id(), change.matrix());
+                break;
+            case SurfaceChange::SurfaceChangeCase::kFinalCrop:
+                status = setFinalCrop(change.id(), change.final_crop());
+                break;
+            case SurfaceChange::SurfaceChangeCase::kOverrideScalingMode:
+                status = setOverrideScalingMode(change.id(), change.override_scaling_mode());
+                break;
+            case SurfaceChange::SurfaceChangeCase::kTransparentRegionHint:
+                status = setTransparentRegionHint(change.id(), change.transparent_region_hint());
+                break;
+            case SurfaceChange::SurfaceChangeCase::kLayerStack:
+                status = setLayerStack(change.id(), change.layer_stack());
+                break;
+            case SurfaceChange::SurfaceChangeCase::kHiddenFlag:
+                status = setHiddenFlag(change.id(), change.hidden_flag());
+                break;
+            case SurfaceChange::SurfaceChangeCase::kOpaqueFlag:
+                status = setOpaqueFlag(change.id(), change.opaque_flag());
+                break;
+            case SurfaceChange::SurfaceChangeCase::kSecureFlag:
+                status = setSecureFlag(change.id(), change.secure_flag());
+                break;
+            case SurfaceChange::SurfaceChangeCase::kDeferredTransaction:
+                waitUntilDeferredTransactionLayerExists(change.deferred_transaction(), lock);
+                status = setDeferredTransaction(change.id(), change.deferred_transaction());
+                break;
+            default:
+                status = NO_ERROR;
+                break;
+        }
+
+        if (status != NO_ERROR) {
+            ALOGE("SET TRANSACTION FAILED");
+            return status;
+        }
+    }
+    return status;
+}
+
+void Replayer::doDisplayTransaction(const DisplayChanges& displayChanges) {
+    for (const DisplayChange& change : displayChanges) {
+        ALOGV("Doing display transaction");
+        std::unique_lock<std::mutex> lock(mDisplayLock);
+        if (mDisplays[change.id()] == nullptr) {
+            mDisplayCond.wait(lock, [&] { return (mDisplays[change.id()] != nullptr); });
+        }
+
+        switch (change.DisplayChange_case()) {
+            case DisplayChange::DisplayChangeCase::kSurface:
+                setDisplaySurface(change.id(), change.surface());
+                break;
+            case DisplayChange::DisplayChangeCase::kLayerStack:
+                setDisplayLayerStack(change.id(), change.layer_stack());
+                break;
+            case DisplayChange::DisplayChangeCase::kSize:
+                setDisplaySize(change.id(), change.size());
+                break;
+            case DisplayChange::DisplayChangeCase::kProjection:
+                setDisplayProjection(change.id(), change.projection());
+                break;
+            default:
+                break;
+        }
+    }
+}
+
+status_t Replayer::setPosition(layer_id id, const PositionChange& pc) {
+    ALOGV("Layer %d: Setting Position -- x=%f, y=%f", id, pc.x(), pc.y());
+    return mLayers[id]->setPosition(pc.x(), pc.y());
+}
+
+status_t Replayer::setSize(layer_id id, const SizeChange& sc) {
+    ALOGV("Layer %d: Setting Size -- w=%u, h=%u", id, sc.w(), sc.h());
+    return mLayers[id]->setSize(sc.w(), sc.h());
+}
+
+status_t Replayer::setLayer(layer_id id, const LayerChange& lc) {
+    ALOGV("Layer %d: Setting Layer -- layer=%d", id, lc.layer());
+    return mLayers[id]->setLayer(lc.layer());
+}
+
+status_t Replayer::setAlpha(layer_id id, const AlphaChange& ac) {
+    ALOGV("Layer %d: Setting Alpha -- alpha=%f", id, ac.alpha());
+    return mLayers[id]->setAlpha(ac.alpha());
+}
+
+status_t Replayer::setCrop(layer_id id, const CropChange& cc) {
+    ALOGV("Layer %d: Setting Crop -- left=%d, top=%d, right=%d, bottom=%d", id,
+            cc.rectangle().left(), cc.rectangle().top(), cc.rectangle().right(),
+            cc.rectangle().bottom());
+
+    Rect r = Rect(cc.rectangle().left(), cc.rectangle().top(), cc.rectangle().right(),
+            cc.rectangle().bottom());
+    return mLayers[id]->setCrop(r);
+}
+
+status_t Replayer::setFinalCrop(layer_id id, const FinalCropChange& fcc) {
+    ALOGV("Layer %d: Setting Final Crop -- left=%d, top=%d, right=%d, bottom=%d", id,
+            fcc.rectangle().left(), fcc.rectangle().top(), fcc.rectangle().right(),
+            fcc.rectangle().bottom());
+    Rect r = Rect(fcc.rectangle().left(), fcc.rectangle().top(), fcc.rectangle().right(),
+            fcc.rectangle().bottom());
+    return mLayers[id]->setFinalCrop(r);
+}
+
+status_t Replayer::setMatrix(layer_id id, const MatrixChange& mc) {
+    ALOGV("Layer %d: Setting Matrix -- dsdx=%f, dtdx=%f, dsdy=%f, dtdy=%f", id, mc.dsdx(),
+            mc.dtdx(), mc.dsdy(), mc.dtdy());
+    return mLayers[id]->setMatrix(mc.dsdx(), mc.dtdx(), mc.dsdy(), mc.dtdy());
+}
+
+status_t Replayer::setOverrideScalingMode(layer_id id, const OverrideScalingModeChange& osmc) {
+    ALOGV("Layer %d: Setting Override Scaling Mode -- mode=%d", id, osmc.override_scaling_mode());
+    return mLayers[id]->setOverrideScalingMode(osmc.override_scaling_mode());
+}
+
+status_t Replayer::setTransparentRegionHint(layer_id id, const TransparentRegionHintChange& trhc) {
+    ALOGV("Setting Transparent Region Hint");
+    Region re = Region();
+
+    for (auto r : trhc.region()) {
+        Rect rect = Rect(r.left(), r.top(), r.right(), r.bottom());
+        re.merge(rect);
+    }
+
+    return mLayers[id]->setTransparentRegionHint(re);
+}
+
+status_t Replayer::setLayerStack(layer_id id, const LayerStackChange& lsc) {
+    ALOGV("Layer %d: Setting LayerStack -- layer_stack=%d", id, lsc.layer_stack());
+    return mLayers[id]->setLayerStack(lsc.layer_stack());
+}
+
+status_t Replayer::setHiddenFlag(layer_id id, const HiddenFlagChange& hfc) {
+    ALOGV("Layer %d: Setting Hidden Flag -- hidden_flag=%d", id, hfc.hidden_flag());
+    layer_id flag = hfc.hidden_flag() ? layer_state_t::eLayerHidden : 0;
+
+    return mLayers[id]->setFlags(flag, layer_state_t::eLayerHidden);
+}
+
+status_t Replayer::setOpaqueFlag(layer_id id, const OpaqueFlagChange& ofc) {
+    ALOGV("Layer %d: Setting Opaque Flag -- opaque_flag=%d", id, ofc.opaque_flag());
+    layer_id flag = ofc.opaque_flag() ? layer_state_t::eLayerOpaque : 0;
+
+    return mLayers[id]->setFlags(flag, layer_state_t::eLayerOpaque);
+}
+
+status_t Replayer::setSecureFlag(layer_id id, const SecureFlagChange& sfc) {
+    ALOGV("Layer %d: Setting Secure Flag -- secure_flag=%d", id, sfc.secure_flag());
+    layer_id flag = sfc.secure_flag() ? layer_state_t::eLayerSecure : 0;
+
+    return mLayers[id]->setFlags(flag, layer_state_t::eLayerSecure);
+}
+
+status_t Replayer::setDeferredTransaction(layer_id id, const DeferredTransactionChange& dtc) {
+    ALOGV("Layer %d: Setting Deferred Transaction -- layer_id=%d, "
+          "frame_number=%llu",
+            id, dtc.layer_id(), dtc.frame_number());
+    if (mLayers.count(dtc.layer_id()) == 0 || mLayers[dtc.layer_id()] == nullptr) {
+        ALOGE("Layer %d not found in Deferred Transaction", dtc.layer_id());
+        return BAD_VALUE;
+    }
+
+    auto handle = mLayers[dtc.layer_id()]->getHandle();
+
+    return mLayers[id]->deferTransactionUntil(handle, dtc.frame_number());
+}
+
+void Replayer::setDisplaySurface(display_id id, const DispSurfaceChange& /*dsc*/) {
+    sp<IGraphicBufferProducer> outProducer;
+    sp<IGraphicBufferConsumer> outConsumer;
+    BufferQueue::createBufferQueue(&outProducer, &outConsumer);
+
+    SurfaceComposerClient::setDisplaySurface(mDisplays[id], outProducer);
+}
+
+void Replayer::setDisplayLayerStack(display_id id, const LayerStackChange& lsc) {
+    SurfaceComposerClient::setDisplayLayerStack(mDisplays[id], lsc.layer_stack());
+}
+
+void Replayer::setDisplaySize(display_id id, const SizeChange& sc) {
+    SurfaceComposerClient::setDisplaySize(mDisplays[id], sc.w(), sc.h());
+}
+
+void Replayer::setDisplayProjection(display_id id, const ProjectionChange& pc) {
+    Rect viewport = Rect(pc.viewport().left(), pc.viewport().top(), pc.viewport().right(),
+            pc.viewport().bottom());
+    Rect frame = Rect(pc.frame().left(), pc.frame().top(), pc.frame().right(), pc.frame().bottom());
+
+    SurfaceComposerClient::setDisplayProjection(mDisplays[id], pc.orientation(), viewport, frame);
+}
+
+status_t Replayer::createSurfaceControl(
+        const SurfaceCreation& create, const std::shared_ptr<Event>& event) {
+    event->readyToExecute();
+
+    ALOGV("Creating Surface Control: ID: %d", create.id());
+    sp<SurfaceControl> surfaceControl = mComposerClient->createSurface(
+            String8(create.name().c_str()), create.w(), create.h(), PIXEL_FORMAT_RGBA_8888, 0);
+
+    if (surfaceControl == nullptr) {
+        ALOGE("CreateSurfaceControl: unable to create surface control");
+        return BAD_VALUE;
+    }
+
+    std::lock_guard<std::mutex> lock1(mLayerLock);
+    auto& layer = mLayers[create.id()];
+    layer = surfaceControl;
+
+    mColors[create.id()] = HSV(rand() % 360, 1, 1);
+
+    mLayerCond.notify_all();
+
+    std::lock_guard<std::mutex> lock2(mBufferQueueSchedulerLock);
+    if (mBufferQueueSchedulers.count(create.id()) != 0) {
+        mBufferQueueSchedulers[create.id()]->setSurfaceControl(
+                mLayers[create.id()], mColors[create.id()]);
+    }
+
+    return NO_ERROR;
+}
+
+status_t Replayer::deleteSurfaceControl(
+        const SurfaceDeletion& delete_, const std::shared_ptr<Event>& event) {
+    ALOGV("Deleting %d Surface Control", delete_.id());
+    event->readyToExecute();
+
+    std::lock_guard<std::mutex> lock1(mPendingLayersLock);
+
+    mLayersPendingRemoval.push_back(delete_.id());
+
+    const auto& iterator = mBufferQueueSchedulers.find(delete_.id());
+    if (iterator != mBufferQueueSchedulers.end()) {
+        (*iterator).second->stopScheduling();
+    }
+
+    std::lock_guard<std::mutex> lock2(mLayerLock);
+    if (mLayers[delete_.id()] != nullptr) {
+        mComposerClient->destroySurface(mLayers[delete_.id()]->getHandle());
+    }
+
+    return NO_ERROR;
+}
+
+void Replayer::doDeleteSurfaceControls() {
+    std::lock_guard<std::mutex> lock1(mPendingLayersLock);
+    std::lock_guard<std::mutex> lock2(mLayerLock);
+    if (!mLayersPendingRemoval.empty()) {
+        for (int id : mLayersPendingRemoval) {
+            mLayers.erase(id);
+            mColors.erase(id);
+            mBufferQueueSchedulers.erase(id);
+        }
+        mLayersPendingRemoval.clear();
+    }
+}
+
+status_t Replayer::injectVSyncEvent(
+        const VSyncEvent& vSyncEvent, const std::shared_ptr<Event>& event) {
+    ALOGV("Injecting VSync Event");
+
+    doDeleteSurfaceControls();
+
+    event->readyToExecute();
+
+    SurfaceComposerClient::injectVSync(vSyncEvent.when());
+
+    return NO_ERROR;
+}
+
+void Replayer::createDisplay(const DisplayCreation& create, const std::shared_ptr<Event>& event) {
+    ALOGV("Creating display");
+    event->readyToExecute();
+
+    std::lock_guard<std::mutex> lock(mDisplayLock);
+    sp<IBinder> display = SurfaceComposerClient::createDisplay(
+            String8(create.name().c_str()), create.is_secure());
+    mDisplays[create.id()] = display;
+
+    mDisplayCond.notify_all();
+
+    ALOGV("Done creating display");
+}
+
+void Replayer::deleteDisplay(const DisplayDeletion& delete_, const std::shared_ptr<Event>& event) {
+    ALOGV("Delete display");
+    event->readyToExecute();
+
+    std::lock_guard<std::mutex> lock(mDisplayLock);
+    SurfaceComposerClient::destroyDisplay(mDisplays[delete_.id()]);
+    mDisplays.erase(delete_.id());
+}
+
+void Replayer::updatePowerMode(const PowerModeUpdate& pmu, const std::shared_ptr<Event>& event) {
+    ALOGV("Updating power mode");
+    event->readyToExecute();
+    SurfaceComposerClient::setDisplayPowerMode(mDisplays[pmu.id()], pmu.mode());
+}
+
+void Replayer::waitUntilTimestamp(int64_t timestamp) {
+    ALOGV("Waiting for %lld nanoseconds...", static_cast<int64_t>(timestamp - mCurrentTime));
+    std::this_thread::sleep_for(std::chrono::nanoseconds(timestamp - mCurrentTime));
+}
+
+void Replayer::waitUntilDeferredTransactionLayerExists(
+        const DeferredTransactionChange& dtc, std::unique_lock<std::mutex>& lock) {
+    if (mLayers.count(dtc.layer_id()) == 0 || mLayers[dtc.layer_id()] == nullptr) {
+        mLayerCond.wait(lock, [&] { return (mLayers[dtc.layer_id()] != nullptr); });
+    }
+}
+
+status_t Replayer::loadSurfaceComposerClient() {
+    mComposerClient = new SurfaceComposerClient;
+    return mComposerClient->initCheck();
+}
diff --git a/cmds/surfacereplayer/replayer/Replayer.h b/cmds/surfacereplayer/replayer/Replayer.h
new file mode 100644
index 0000000..f757fc3
--- /dev/null
+++ b/cmds/surfacereplayer/replayer/Replayer.h
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_SURFACEREPLAYER_H
+#define ANDROID_SURFACEREPLAYER_H
+
+#include "BufferQueueScheduler.h"
+#include "Color.h"
+#include "Event.h"
+
+#include <frameworks/native/cmds/surfacereplayer/proto/src/trace.pb.h>
+
+#include <gui/SurfaceComposerClient.h>
+#include <gui/SurfaceControl.h>
+
+#include <utils/Errors.h>
+#include <utils/StrongPointer.h>
+
+#include <condition_variable>
+#include <memory>
+#include <mutex>
+#include <queue>
+#include <thread>
+#include <unordered_map>
+#include <utility>
+
+namespace android {
+
+const auto DEFAULT_PATH = "/data/local/tmp/SurfaceTrace.dat";
+const auto RAND_COLOR_SEED = 700;
+const auto DEFAULT_THREADS = 3;
+
+typedef int32_t layer_id;
+typedef int32_t display_id;
+
+typedef google::protobuf::RepeatedPtrField<SurfaceChange> SurfaceChanges;
+typedef google::protobuf::RepeatedPtrField<DisplayChange> DisplayChanges;
+
+class Replayer {
+  public:
+    Replayer(const std::string& filename, bool replayManually = false,
+            int numThreads = DEFAULT_THREADS, bool wait = true, nsecs_t stopHere = -1);
+    Replayer(const Trace& trace, bool replayManually = false, int numThreads = DEFAULT_THREADS,
+            bool wait = true, nsecs_t stopHere = -1);
+
+    status_t replay();
+
+  private:
+    status_t initReplay();
+
+    void waitForConsoleCommmand();
+    static void stopAutoReplayHandler(int signal);
+
+    status_t dispatchEvent(int index);
+
+    status_t doTransaction(const Transaction& transaction, const std::shared_ptr<Event>& event);
+    status_t createSurfaceControl(const SurfaceCreation& create,
+            const std::shared_ptr<Event>& event);
+    status_t deleteSurfaceControl(const SurfaceDeletion& delete_,
+            const std::shared_ptr<Event>& event);
+    status_t injectVSyncEvent(const VSyncEvent& vsyncEvent, const std::shared_ptr<Event>& event);
+    void createDisplay(const DisplayCreation& create, const std::shared_ptr<Event>& event);
+    void deleteDisplay(const DisplayDeletion& delete_, const std::shared_ptr<Event>& event);
+    void updatePowerMode(const PowerModeUpdate& update, const std::shared_ptr<Event>& event);
+
+    status_t doSurfaceTransaction(const SurfaceChanges& surfaceChange);
+    void doDisplayTransaction(const DisplayChanges& displayChange);
+
+    status_t setPosition(layer_id id, const PositionChange& pc);
+    status_t setSize(layer_id id, const SizeChange& sc);
+    status_t setAlpha(layer_id id, const AlphaChange& ac);
+    status_t setLayer(layer_id id, const LayerChange& lc);
+    status_t setCrop(layer_id id, const CropChange& cc);
+    status_t setFinalCrop(layer_id id, const FinalCropChange& fcc);
+    status_t setMatrix(layer_id id, const MatrixChange& mc);
+    status_t setOverrideScalingMode(layer_id id, const OverrideScalingModeChange& osmc);
+    status_t setTransparentRegionHint(layer_id id, const TransparentRegionHintChange& trgc);
+    status_t setLayerStack(layer_id id, const LayerStackChange& lsc);
+    status_t setHiddenFlag(layer_id id, const HiddenFlagChange& hfc);
+    status_t setOpaqueFlag(layer_id id, const OpaqueFlagChange& ofc);
+    status_t setSecureFlag(layer_id id, const SecureFlagChange& sfc);
+    status_t setDeferredTransaction(layer_id id, const DeferredTransactionChange& dtc);
+
+    void setDisplaySurface(display_id id, const DispSurfaceChange& dsc);
+    void setDisplayLayerStack(display_id id, const LayerStackChange& lsc);
+    void setDisplaySize(display_id id, const SizeChange& sc);
+    void setDisplayProjection(display_id id, const ProjectionChange& pc);
+
+    void doDeleteSurfaceControls();
+    void waitUntilTimestamp(int64_t timestamp);
+    void waitUntilDeferredTransactionLayerExists(
+            const DeferredTransactionChange& dtc, std::unique_lock<std::mutex>& lock);
+    status_t loadSurfaceComposerClient();
+
+    Trace mTrace;
+    bool mLoaded = false;
+    int32_t mIncrementIndex = 0;
+    int64_t mCurrentTime = 0;
+    int32_t mNumThreads = DEFAULT_THREADS;
+
+    Increment mCurrentIncrement;
+
+    std::string mLastInput;
+
+    static atomic_bool sReplayingManually;
+    bool mWaitingForNextVSync;
+    bool mWaitForTimeStamps;
+    nsecs_t mStopTimeStamp;
+    bool mHasStopped;
+
+    std::mutex mLayerLock;
+    std::condition_variable mLayerCond;
+    std::unordered_map<layer_id, sp<SurfaceControl>> mLayers;
+    std::unordered_map<layer_id, HSV> mColors;
+
+    std::mutex mPendingLayersLock;
+    std::vector<layer_id> mLayersPendingRemoval;
+
+    std::mutex mBufferQueueSchedulerLock;
+    std::unordered_map<layer_id, std::shared_ptr<BufferQueueScheduler>> mBufferQueueSchedulers;
+
+    std::mutex mDisplayLock;
+    std::condition_variable mDisplayCond;
+    std::unordered_map<display_id, sp<IBinder>> mDisplays;
+
+    sp<SurfaceComposerClient> mComposerClient;
+    std::queue<std::shared_ptr<Event>> mPendingIncrements;
+};
+
+}  // namespace android
+#endif
diff --git a/cmds/surfacereplayer/replayer/trace_creator/trace_creator.py b/cmds/surfacereplayer/replayer/trace_creator/trace_creator.py
new file mode 100644
index 0000000..a892e46
--- /dev/null
+++ b/cmds/surfacereplayer/replayer/trace_creator/trace_creator.py
@@ -0,0 +1,294 @@
+#!/usr/bin/python
+from subprocess import call
+import os
+proto_path = os.environ['ANDROID_BUILD_TOP'] + "/frameworks/native/cmds/surfacereplayer/proto/src/"
+call(["aprotoc", "-I=" + proto_path, "--python_out=.", proto_path + "trace.proto"])
+
+from trace_pb2 import *
+
+trace = Trace()
+
+def main():
+    global trace
+    while(1):
+        option = main_menu()
+
+        if option == 0:
+            break
+
+        increment = trace.increment.add()
+        increment.time_stamp  = int(input("Time stamp of action: "))
+
+        if option == 1:
+           transaction(increment)
+        elif option == 2:
+            surface_create(increment)
+        elif option == 3:
+            surface_delete(increment)
+        elif option == 4:
+            display_create(increment)
+        elif option == 5:
+            display_delete(increment)
+        elif option == 6:
+            buffer_update(increment)
+        elif option == 7:
+            vsync_event(increment)
+        elif option == 8:
+            power_mode_update(increment)
+
+    seralizeTrace()
+
+def seralizeTrace():
+    with open("trace.dat", 'wb') as f:
+        f.write(trace.SerializeToString())
+
+
+def main_menu():
+    print ("")
+    print ("What would you like to do?")
+    print ("1. Add transaction")
+    print ("2. Add surface creation")
+    print ("3. Add surface deletion")
+    print ("4. Add display creation")
+    print ("5. Add display deletion")
+    print ("6. Add buffer update")
+    print ("7. Add VSync event")
+    print ("8. Add power mode update")
+    print ("0. Finish and serialize")
+    print ("")
+
+    return int(input("> "))
+
+def transaction_menu():
+    print ("")
+    print ("What kind of transaction?")
+    print ("1. Position Change")
+    print ("2. Size Change")
+    print ("3. Alpha Change")
+    print ("4. Layer Change")
+    print ("5. Crop Change")
+    print ("6. Final Crop Change")
+    print ("7. Matrix Change")
+    print ("8. Override Scaling Mode Change")
+    print ("9. Transparent Region Hint Change")
+    print ("10. Layer Stack Change")
+    print ("11. Hidden Flag Change")
+    print ("12. Opaque Flag Change")
+    print ("13. Secure Flag Change")
+    print ("14. Deferred Transaction Change")
+    print ("15. Display - Surface Change")
+    print ("16. Display - Layer Stack Change")
+    print ("17. Display - Size Change")
+    print ("18. Display - Projection Change")
+    print ("0. Finished adding Changes to this transaction")
+    print ("")
+
+    return int(input("> "))
+
+def transaction(increment):
+    global trace
+
+    increment.transaction.synchronous \
+            = bool(input("Is transaction synchronous (True/False): "))
+    increment.transaction.animation \
+            = bool(input("Is transaction animated (True/False): "))
+
+    while(1):
+        option = transaction_menu()
+
+        if option == 0:
+            break
+
+        change = None
+        if option <= 14:
+            change = increment.transaction.surface_change.add()
+        elif option >= 15 and option <= 18:
+            change = increment.transaction.display_change.add()
+
+        change.id = int(input("ID of layer/display to undergo a change: "))
+
+        if option == 1:
+            change.position.x, change.position.y = position()
+        elif option == 2:
+            change.size.w, change.size.h = size()
+        elif option == 3:
+            change.alpha.alpha = alpha()
+        elif option == 4:
+            change.layer.layer = layer()
+        elif option == 5:
+            change.crop.rectangle.left,  change.crop.rectangle.top, \
+            change.crop.rectangle.right, change.crop.rectangle.bottom = crop()
+        elif option == 6:
+            change.final_crop.rectangle.left, \
+            change.final_crop.rectangle.top,  \
+            change.final_crop.rectangle.right,\
+            change.final_crop.rectangle.bottom = final_crop()
+        elif option == 7:
+            change.matrix.dsdx,\
+            change.matrix.dtdx,\
+            change.matrix.dsdy,\
+            change.matrix.dtdy = layer()
+        elif option == 8:
+            change.override_scaling_mode.override_scaling_mode \
+                                     = override_scaling_mode()
+        elif option == 9:
+            for rect in transparent_region_hint():
+                new = increment.transparent_region_hint.region.add()
+                new.left = rect[0]
+                new.top = rect[1]
+                new.right = rect[2]
+                new.bottom = rect[3]
+        elif option == 10:
+            change.layer_stack.layer_stack = layer_stack()
+        elif option == 11:
+            change.hidden_flag.hidden_flag = hidden_flag()
+        elif option == 12:
+            change.opaque_flag.opaque_flag = opaque_flag()
+        elif option == 13:
+            change.secure_flag.secure_flag = secure_flag()
+        elif option == 14:
+            change.deferred_transaction.layer_id, \
+            change.deferred_transaction.frame_number = deferred_transaction()
+        elif option == 15:
+            change.surface.buffer_queue_id, \
+            change.surface.buffer_queue_name = surface()
+        elif option == 16:
+            change.layer_stack.layer_stack = layer_stack()
+        elif option == 17:
+            change.size.w, change.size.h = size()
+        elif option == 18:
+            projection(change)
+
+def surface_create(increment):
+    increment.surface_creation.id = int(input("Enter id: "))
+    n = str(raw_input("Enter name: "))
+    increment.surface_creation.name = n
+    increment.surface_creation.w = input("Enter w: ")
+    increment.surface_creation.h = input("Enter h: ")
+
+def surface_delete(increment):
+    increment.surface_deletion.id = int(input("Enter id: "))
+
+def display_create(increment):
+    increment.display_creation.id = int(input("Enter id: "))
+    increment.display_creation.name = str(raw_input("Enter name: "))
+    increment.display_creation.type = int(input("Enter type: "))
+    increment.display_creation.is_secure = bool(input("Enter if secure: "))
+
+def display_delete(increment):
+    increment.surface_deletion.id = int(input("Enter id: "))
+
+def buffer_update(increment):
+    increment.buffer_update.id = int(input("Enter id: "))
+    increment.buffer_update.w = int(input("Enter w: "))
+    increment.buffer_update.h = int(input("Enter h: "))
+    increment.buffer_update.frame_number = int(input("Enter frame_number: "))
+
+def vsync_event(increment):
+    increment.vsync_event.when = int(input("Enter when: "))
+
+def power_mode_update(increment):
+    increment.power_mode_update.id = int(input("Enter id: "))
+    increment.power_mode_update.mode = int(input("Enter mode: "))
+
+def position():
+    x = input("Enter x: ")
+    y = input("Enter y: ")
+
+    return float(x), float(y)
+
+def size():
+    w = input("Enter w: ")
+    h = input("Enter h: ")
+
+    return int(w), int(h)
+
+def alpha():
+    alpha = input("Enter alpha: ")
+
+    return float(alpha)
+
+def layer():
+    layer = input("Enter layer: ")
+
+    return int(layer)
+
+def crop():
+    return rectangle()
+
+def final_crop():
+    return rectangle()
+
+def matrix():
+    dsdx = input("Enter dsdx: ")
+    dtdx = input("Enter dtdx: ")
+    dsdy = input("Enter dsdy: ")
+    dtdy = input("Enter dtdy: ")
+
+    return float(dsdx)
+
+def override_scaling_mode():
+    mode = input("Enter override scaling mode: ")
+
+    return int(mode)
+
+def transparent_region_hint():
+    num = input("Enter number of rectangles in region: ")
+
+    return [rectangle() in range(x)]
+
+def layer_stack():
+    layer_stack = input("Enter layer stack: ")
+
+    return int(layer_stack)
+
+def hidden_flag():
+    flag = input("Enter hidden flag state (True/False): ")
+
+    return bool(flag)
+
+def opaque_flag():
+    flag = input("Enter opaque flag state (True/False): ")
+
+    return bool(flag)
+
+def secure_flag():
+    flag = input("Enter secure flag state (True/False): ")
+
+    return bool(flag)
+
+def deferred_transaction():
+    layer_id = input("Enter layer_id: ")
+    frame_number = input("Enter frame_number: ")
+
+    return int(layer_id), int(frame_number)
+
+def surface():
+    id = input("Enter id: ")
+    name = raw_input("Enter name: ")
+
+    return int(id), str(name)
+
+def projection(change):
+    change.projection.orientation = input("Enter orientation: ")
+    print("Enter rectangle for viewport")
+    change.projection.viewport.left, \
+    change.projection.viewport.top,  \
+    change.projection.viewport.right,\
+    change.projection.viewport.bottom = rectangle()
+    print("Enter rectangle for frame")
+    change.projection.frame.left, \
+    change.projection.frame.top,  \
+    change.projection.frame.right,\
+    change.projection.frame.bottom = rectangle()
+
+def rectangle():
+    left = input("Enter left: ")
+    top = input("Enter top: ")
+    right = input("Enter right: ")
+    bottom = input("Enter bottom: ")
+
+    return int(left), int(top), int(right), int(bottom)
+
+if __name__ == "__main__":
+    main()
diff --git a/data/etc/handheld_core_hardware.xml b/data/etc/handheld_core_hardware.xml
index 9cb4d6d..f10cbc3 100644
--- a/data/etc/handheld_core_hardware.xml
+++ b/data/etc/handheld_core_hardware.xml
@@ -42,6 +42,7 @@
     <feature name="android.software.backup" />
     <feature name="android.software.home_screen" />
     <feature name="android.software.input_methods" />
+    <feature name="android.software.picture_in_picture" />
     <feature name="android.software.print" />
 
     <!-- Feature to specify if the device supports adding device admins. -->
diff --git a/data/etc/tablet_core_hardware.xml b/data/etc/tablet_core_hardware.xml
index 8128165..7f545e6 100644
--- a/data/etc/tablet_core_hardware.xml
+++ b/data/etc/tablet_core_hardware.xml
@@ -42,6 +42,7 @@
     <feature name="android.software.backup" />
     <feature name="android.software.home_screen" />
     <feature name="android.software.input_methods" />
+    <feature name="android.software.picture_in_picture" />
     <feature name="android.software.print" />
 
     <!-- Feature to specify if the device supports adding device admins. -->
diff --git a/include/binder/IBinder.h b/include/binder/IBinder.h
index 9097cb3..2e62957 100644
--- a/include/binder/IBinder.h
+++ b/include/binder/IBinder.h
@@ -38,6 +38,7 @@
 class IInterface;
 class Parcel;
 class IResultReceiver;
+class IShellCallback;
 
 /**
  * Base class and low-level protocol for a remotable object.
@@ -82,7 +83,7 @@
     virtual status_t        pingBinder() = 0;
     virtual status_t        dump(int fd, const Vector<String16>& args) = 0;
     static  status_t        shellCommand(const sp<IBinder>& target, int in, int out, int err,
-                                         Vector<String16>& args,
+                                         Vector<String16>& args, const sp<IShellCallback>& callback,
                                          const sp<IResultReceiver>& resultReceiver);
 
     virtual status_t        transact(   uint32_t code,
diff --git a/include/binder/IShellCallback.h b/include/binder/IShellCallback.h
new file mode 100644
index 0000000..fda9ee6
--- /dev/null
+++ b/include/binder/IShellCallback.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+#ifndef ANDROID_ISHELL_CALLBACK_H
+#define ANDROID_ISHELL_CALLBACK_H
+
+#include <binder/IInterface.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------
+
+class IShellCallback : public IInterface
+{
+public:
+    DECLARE_META_INTERFACE(ShellCallback);
+
+    virtual int openOutputFile(const String16& path, const String16& seLinuxContext) = 0;
+
+    enum {
+        OP_OPEN_OUTPUT_FILE = IBinder::FIRST_CALL_TRANSACTION
+    };
+};
+
+// ----------------------------------------------------------------------
+
+class BnShellCallback : public BnInterface<IShellCallback>
+{
+public:
+    virtual status_t    onTransact( uint32_t code,
+                                    const Parcel& data,
+                                    Parcel* reply,
+                                    uint32_t flags = 0);
+};
+
+// ----------------------------------------------------------------------
+
+}; // namespace android
+
+#endif // ANDROID_ISHELL_CALLBACK_H
+
diff --git a/include/binder/Parcel.h b/include/binder/Parcel.h
index 74e75d7..954b976 100644
--- a/include/binder/Parcel.h
+++ b/include/binder/Parcel.h
@@ -153,6 +153,8 @@
     template<typename T>
     status_t            writeParcelableVector(const std::unique_ptr<std::vector<std::unique_ptr<T>>>& val);
     template<typename T>
+    status_t            writeParcelableVector(const std::shared_ptr<std::vector<std::unique_ptr<T>>>& val);
+    template<typename T>
     status_t            writeParcelableVector(const std::vector<T>& val);
 
     template<typename T>
@@ -176,16 +178,21 @@
     // when this function returns).
     // Doesn't take ownership of the native_handle.
     status_t            writeNativeHandle(const native_handle* handle);
-    
+
     // Place a file descriptor into the parcel.  The given fd must remain
     // valid for the lifetime of the parcel.
     // The Parcel does not take ownership of the given fd unless you ask it to.
     status_t            writeFileDescriptor(int fd, bool takeOwnership = false);
-    
+
     // Place a file descriptor into the parcel.  A dup of the fd is made, which
     // will be closed once the parcel is destroyed.
     status_t            writeDupFileDescriptor(int fd);
 
+    // Place a Java "parcel file descriptor" into the parcel.  The given fd must remain
+    // valid for the lifetime of the parcel.
+    // The Parcel does not take ownership of the given fd unless you ask it to.
+    status_t            writeParcelFileDescriptor(int fd, bool takeOwnership = false);
+
     // Place a file descriptor into the parcel.  This will not affect the
     // semantics of the smart file descriptor. A new descriptor will be
     // created, and will be closed when the parcel is destroyed.
@@ -332,6 +339,10 @@
     // in the parcel, which you do not own -- use dup() to get your own copy.
     int                 readFileDescriptor() const;
 
+    // Retrieve a Java "parcel file descriptor" from the parcel.  This returns the raw fd
+    // in the parcel, which you do not own -- use dup() to get your own copy.
+    int                 readParcelFileDescriptor() const;
+
     // Retrieve a smart file descriptor from the parcel.
     status_t            readUniqueFileDescriptor(
                             base::unique_fd* val) const;
@@ -847,7 +858,16 @@
         return this->writeInt32(-1);
     }
 
-    return unsafeWriteTypedVector(*val, &Parcel::writeParcelable);
+    return unsafeWriteTypedVector(*val, &Parcel::writeNullableParcelable<T>);
+}
+
+template<typename T>
+status_t Parcel::writeParcelableVector(const std::shared_ptr<std::vector<std::unique_ptr<T>>>& val) {
+    if (val.get() == nullptr) {
+        return this->writeInt32(-1);
+    }
+
+    return unsafeWriteTypedVector(*val, &Parcel::writeNullableParcelable<T>);
 }
 
 // ---------------------------------------------------------------------------
diff --git a/include/gui/BufferQueue.h b/include/gui/BufferQueue.h
index 266f0aa..f24f135 100644
--- a/include/gui/BufferQueue.h
+++ b/include/gui/BufferQueue.h
@@ -79,7 +79,8 @@
     // needed gralloc buffers.
     static void createBufferQueue(sp<IGraphicBufferProducer>* outProducer,
             sp<IGraphicBufferConsumer>* outConsumer,
-            const sp<IGraphicBufferAlloc>& allocator = NULL);
+            const sp<IGraphicBufferAlloc>& allocator = NULL,
+            bool consumerIsSurfaceFlinger = false);
 
 private:
     BufferQueue(); // Create through createBufferQueue
diff --git a/include/gui/BufferQueueProducer.h b/include/gui/BufferQueueProducer.h
index 79e7af2..65dea0d 100644
--- a/include/gui/BufferQueueProducer.h
+++ b/include/gui/BufferQueueProducer.h
@@ -29,7 +29,7 @@
 public:
     friend class BufferQueue; // Needed to access binderDied
 
-    BufferQueueProducer(const sp<BufferQueueCore>& core);
+    BufferQueueProducer(const sp<BufferQueueCore>& core, bool consumerIsSurfaceFlinger = false);
     virtual ~BufferQueueProducer();
 
     // requestBuffer returns the GraphicBuffer for slot N.
@@ -218,6 +218,10 @@
 
     uint32_t mStickyTransform;
 
+    // This controls whether the GraphicBuffer pointer in the BufferItem is
+    // cleared after being queued
+    bool mConsumerIsSurfaceFlinger;
+
     // This saves the fence from the last queueBuffer, such that the
     // next queueBuffer call can throttle buffer production. The prior
     // queueBuffer's fence is not nessessarily available elsewhere,
diff --git a/include/gui/IConsumerListener.h b/include/gui/IConsumerListener.h
index 460a03d..0ab7590 100644
--- a/include/gui/IConsumerListener.h
+++ b/include/gui/IConsumerListener.h
@@ -49,7 +49,8 @@
     // previous frames are pending. Frames queued while in synchronous mode
     // always trigger the callback. The item passed to the callback will contain
     // all of the information about the queued frame except for its
-    // GraphicBuffer pointer, which will always be null.
+    // GraphicBuffer pointer, which will always be null (except if the consumer
+    // is SurfaceFlinger).
     //
     // This is called without any lock held and can be called concurrently
     // by multiple threads.
diff --git a/include/gui/IGraphicBufferProducer.h b/include/gui/IGraphicBufferProducer.h
index c2dba50..982cc9d 100644
--- a/include/gui/IGraphicBufferProducer.h
+++ b/include/gui/IGraphicBufferProducer.h
@@ -340,20 +340,19 @@
         void setSurfaceDamage(const Region& damage) { surfaceDamage = damage; }
 
     private:
-        int64_t timestamp;
-        int isAutoTimestamp;
-        android_dataspace dataSpace;
+        int64_t timestamp{0};
+        int isAutoTimestamp{0};
+        android_dataspace dataSpace{HAL_DATASPACE_UNKNOWN};
         Rect crop;
-        int scalingMode;
-        uint32_t transform;
-        uint32_t stickyTransform;
+        int scalingMode{0};
+        uint32_t transform{0};
+        uint32_t stickyTransform{0};
         sp<Fence> fence;
         Region surfaceDamage;
     };
 
     // QueueBufferOutput must be a POD structure
     struct QueueBufferOutput {
-        inline QueueBufferOutput() { }
         // outWidth - filled with default width applied to the buffer
         // outHeight - filled with default height applied to the buffer
         // outTransformHint - filled with default transform applied to the buffer
@@ -380,10 +379,10 @@
             nextFrameNumber = inNextFrameNumber;
         }
     private:
-        uint32_t width;
-        uint32_t height;
-        uint32_t transformHint;
-        uint32_t numPendingBuffers;
+        uint32_t width{0};
+        uint32_t height{0};
+        uint32_t transformHint{0};
+        uint32_t numPendingBuffers{0};
         uint64_t nextFrameNumber{0};
     };
 
diff --git a/include/gui/ISurfaceComposer.h b/include/gui/ISurfaceComposer.h
index 555a0cc..a3ee798 100644
--- a/include/gui/ISurfaceComposer.h
+++ b/include/gui/ISurfaceComposer.h
@@ -171,6 +171,10 @@
      */
     virtual status_t getHdrCapabilities(const sp<IBinder>& display,
             HdrCapabilities* outCapabilities) const = 0;
+
+    virtual status_t enableVSyncInjections(bool enable) = 0;
+
+    virtual status_t injectVSync(nsecs_t when) = 0;
 };
 
 // ----------------------------------------------------------------------------
@@ -202,6 +206,8 @@
         GET_DISPLAY_COLOR_MODES,
         GET_ACTIVE_COLOR_MODE,
         SET_ACTIVE_COLOR_MODE,
+        ENABLE_VSYNC_INJECTIONS,
+        INJECT_VSYNC
     };
 
     virtual status_t onTransact(uint32_t code, const Parcel& data,
diff --git a/include/gui/Surface.h b/include/gui/Surface.h
index 489d5ea..1d97d8b 100644
--- a/include/gui/Surface.h
+++ b/include/gui/Surface.h
@@ -204,7 +204,6 @@
 
     virtual int connect(int api);
     virtual int setBufferCount(int bufferCount);
-    virtual int setBuffersDimensions(uint32_t width, uint32_t height);
     virtual int setBuffersUserDimensions(uint32_t width, uint32_t height);
     virtual int setBuffersFormat(PixelFormat format);
     virtual int setBuffersTransform(uint32_t transform);
@@ -224,6 +223,7 @@
     virtual int setAsyncMode(bool async);
     virtual int setSharedBufferMode(bool sharedBufferMode);
     virtual int setAutoRefresh(bool autoRefresh);
+    virtual int setBuffersDimensions(uint32_t width, uint32_t height);
     virtual int lock(ANativeWindow_Buffer* outBuffer, ARect* inOutDirtyBounds);
     virtual int unlockAndPost();
     virtual int query(int what, int* value) const;
diff --git a/include/gui/SurfaceComposerClient.h b/include/gui/SurfaceComposerClient.h
index f2932f2..9352c57 100644
--- a/include/gui/SurfaceComposerClient.h
+++ b/include/gui/SurfaceComposerClient.h
@@ -131,6 +131,10 @@
     //! Close a composer transaction on all active SurfaceComposerClients.
     static void closeGlobalTransaction(bool synchronous = false);
 
+    static status_t enableVSyncInjections(bool enable);
+
+    static status_t injectVSync(nsecs_t when);
+
     //! Flag the currently open transaction as an animation transaction.
     static void setAnimationTransaction();
 
diff --git a/include/media/openmax/OMX_AsString.h b/include/media/openmax/OMX_AsString.h
index 7ae07ad..b18fd54 100644
--- a/include/media/openmax/OMX_AsString.h
+++ b/include/media/openmax/OMX_AsString.h
@@ -107,6 +107,7 @@
         case OMX_AUDIO_AACObjectLTP:      return "LTP";
         case OMX_AUDIO_AACObjectHE:       return "HE";
         case OMX_AUDIO_AACObjectScalable: return "Scalable";
+        case OMX_AUDIO_AACObjectER_Scalable: return "ER_Scalable";
         case OMX_AUDIO_AACObjectERLC:     return "ERLC";
         case OMX_AUDIO_AACObjectLD:       return "LD";
         case OMX_AUDIO_AACObjectHE_PS:    return "HE_PS";
@@ -545,6 +546,8 @@
         case OMX_IndexConfigAndroidIntraRefresh:        return "ConfigAndroidIntraRefresh";
         case OMX_IndexParamAndroidVideoTemporalLayering: return "ParamAndroidVideoTemporalLayering";
         case OMX_IndexConfigAndroidVideoTemporalLayering: return "ConfigAndroidVideoTemporalLayering";
+        case OMX_IndexParamMaxFrameDurationForBitrateControl:
+            return "ParamMaxFrameDurationForBitrateControl";
         case OMX_IndexConfigAutoFramerateConversion:    return "ConfigAutoFramerateConversion";
         case OMX_IndexConfigPriority:                   return "ConfigPriority";
         case OMX_IndexConfigOperatingRate:              return "ConfigOperatingRate";
diff --git a/include/media/openmax/OMX_Audio.h b/include/media/openmax/OMX_Audio.h
index d8bee76..9c0296b 100644
--- a/include/media/openmax/OMX_Audio.h
+++ b/include/media/openmax/OMX_Audio.h
@@ -259,6 +259,7 @@
   OMX_AUDIO_AACObjectHE,            /**< AAC High Efficiency (object type SBR, HE-AAC profile) */
   OMX_AUDIO_AACObjectScalable,      /**< AAC Scalable object */
   OMX_AUDIO_AACObjectERLC = 17,     /**< ER AAC Low Complexity object (Error Resilient AAC-LC) */
+  OMX_AUDIO_AACObjectER_Scalable = 20, /**< ER AAC scalable object */
   OMX_AUDIO_AACObjectLD = 23,       /**< AAC Low Delay object (Error Resilient) */
   OMX_AUDIO_AACObjectHE_PS = 29,    /**< AAC High Efficiency with Parametric Stereo coding (HE-AAC v2, object type PS) */
   OMX_AUDIO_AACObjectELD = 39,      /** AAC Enhanced Low Delay. NOTE: Pending Khronos standardization **/
diff --git a/include/media/openmax/OMX_Index.h b/include/media/openmax/OMX_Index.h
index 1a2a548..5be1355 100644
--- a/include/media/openmax/OMX_Index.h
+++ b/include/media/openmax/OMX_Index.h
@@ -98,10 +98,13 @@
     OMX_IndexParamMetadataKeyFilter,        /**< reference: OMX_PARAM_METADATAFILTERTYPE */
     OMX_IndexConfigPriorityMgmt,            /**< reference: OMX_PRIORITYMGMTTYPE */
     OMX_IndexParamStandardComponentRole,    /**< reference: OMX_PARAM_COMPONENTROLETYPE */
+    OMX_IndexComponentEndUnused,
 
     OMX_IndexPortStartUnused = 0x02000000,
     OMX_IndexParamPortDefinition,           /**< reference: OMX_PARAM_PORTDEFINITIONTYPE */
     OMX_IndexParamCompBufferSupplier,       /**< reference: OMX_PARAM_BUFFERSUPPLIERTYPE */
+    OMX_IndexPortEndUnused,
+
     OMX_IndexReservedStartUnused = 0x03000000,
 
     /* Audio parameters and configurations */
@@ -134,6 +137,7 @@
     OMX_IndexParamAudioSmv,                 /**< reference: OMX_AUDIO_PARAM_SMVTYPE */
     OMX_IndexParamAudioVorbis,              /**< reference: OMX_AUDIO_PARAM_VORBISTYPE */
     OMX_IndexParamAudioFlac,                /**< reference: OMX_AUDIO_PARAM_FLACTYPE */
+    OMX_IndexAudioEndUnused,
 
     OMX_IndexConfigAudioMidiImmediateEvent, /**< reference: OMX_AUDIO_CONFIG_MIDIIMMEDIATEEVENTTYPE */
     OMX_IndexConfigAudioMidiControl,        /**< reference: OMX_AUDIO_CONFIG_MIDICONTROLTYPE */
@@ -194,6 +198,7 @@
     OMX_IndexParamVideoSliceFMO,            /**< reference: OMX_VIDEO_PARAM_AVCSLICEFMO */
     OMX_IndexConfigVideoAVCIntraPeriod,     /**< reference: OMX_VIDEO_CONFIG_AVCINTRAPERIOD */
     OMX_IndexConfigVideoNalSize,            /**< reference: OMX_VIDEO_CONFIG_NALSIZE */
+    OMX_IndexVideoEndUnused,
 
     /* Image & Video common Configurations */
     OMX_IndexCommonStartUnused = 0x07000000,
@@ -231,6 +236,7 @@
     OMX_IndexConfigCommonFocusRegion,       /**< reference: OMX_CONFIG_FOCUSREGIONTYPE */
     OMX_IndexConfigCommonFocusStatus,       /**< reference: OMX_PARAM_FOCUSSTATUSTYPE */
     OMX_IndexConfigCommonTransitionEffect,  /**< reference: OMX_CONFIG_TRANSITIONEFFECTTYPE */
+    OMX_IndexCommonEndUnused,
 
     /* Reserved Configuration range */
     OMX_IndexOtherStartUnused = 0x08000000,
diff --git a/include/media/openmax/OMX_IndexExt.h b/include/media/openmax/OMX_IndexExt.h
index b688d1d..63fbff8 100644
--- a/include/media/openmax/OMX_IndexExt.h
+++ b/include/media/openmax/OMX_IndexExt.h
@@ -62,6 +62,7 @@
     OMX_IndexParamAudioAndroidAacPresentation,      /**< reference: OMX_AUDIO_PARAM_ANDROID_AACPRESENTATIONTYPE */
     OMX_IndexParamAudioAndroidEac3,                 /**< reference: OMX_AUDIO_PARAM_ANDROID_EAC3TYPE */
     OMX_IndexParamAudioProfileQuerySupported,       /**< reference: OMX_AUDIO_PARAM_ANDROID_PROFILETYPE */
+    OMX_IndexExtAudioEndUnused,
 
     /* Image parameters and configurations */
     OMX_IndexExtImageStartUnused = OMX_IndexKhronosExtensions + 0x00500000,
@@ -75,11 +76,15 @@
     OMX_IndexConfigVideoVp8ReferenceFrame,          /**< reference: OMX_VIDEO_VP8REFERENCEFRAMETYPE */
     OMX_IndexConfigVideoVp8ReferenceFrameType,      /**< reference: OMX_VIDEO_VP8REFERENCEFRAMEINFOTYPE */
     OMX_IndexParamVideoAndroidVp8Encoder,           /**< reference: OMX_VIDEO_PARAM_ANDROID_VP8ENCODERTYPE */
+    OMX_IndexParamVideoVp9,                         /**< reference: OMX_VIDEO_PARAM_VP9TYPE */
+    OMX_IndexParamVideoAndroidVp9Encoder,           /**< reference: OMX_VIDEO_PARAM_ANDROID_VP9ENCODERTYPE */
     OMX_IndexParamVideoHevc,                        /**< reference: OMX_VIDEO_PARAM_HEVCTYPE */
     OMX_IndexParamSliceSegments,                    /**< reference: OMX_VIDEO_SLICESEGMENTSTYPE */
     OMX_IndexConfigAndroidIntraRefresh,             /**< reference: OMX_VIDEO_CONFIG_ANDROID_INTRAREFRESHTYPE */
     OMX_IndexParamAndroidVideoTemporalLayering,     /**< reference: OMX_VIDEO_PARAM_ANDROID_TEMPORALLAYERINGTYPE */
     OMX_IndexConfigAndroidVideoTemporalLayering,    /**< reference: OMX_VIDEO_CONFIG_ANDROID_TEMPORALLAYERINGTYPE */
+    OMX_IndexParamMaxFrameDurationForBitrateControl,/**< reference: OMX_PARAM_U32TYPE */
+    OMX_IndexExtVideoEndUnused,
 
     /* Image & Video common configurations */
     OMX_IndexExtCommonStartUnused = OMX_IndexKhronosExtensions + 0x00700000,
@@ -90,6 +95,7 @@
     OMX_IndexConfigPriority,                        /**< reference: OMX_PARAM_U32TYPE */
     OMX_IndexConfigOperatingRate,                   /**< reference: OMX_PARAM_U32TYPE in Q16 format for video and in Hz for audio */
     OMX_IndexParamConsumerUsageBits,                /**< reference: OMX_PARAM_U32TYPE */
+    OMX_IndexExtOtherEndUnused,
 
     /* Time configurations */
     OMX_IndexExtTimeStartUnused = OMX_IndexKhronosExtensions + 0x00900000,
diff --git a/include/media/openmax/OMX_VideoExt.h b/include/media/openmax/OMX_VideoExt.h
index 2c02431..128dd2d 100644
--- a/include/media/openmax/OMX_VideoExt.h
+++ b/include/media/openmax/OMX_VideoExt.h
@@ -75,39 +75,6 @@
     OMX_VIDEO_VP8LevelMax = 0x7FFFFFFF
 } OMX_VIDEO_VP8LEVELTYPE;
 
-/** VP9 profiles */
-typedef enum OMX_VIDEO_VP9PROFILETYPE {
-    OMX_VIDEO_VP9Profile0       = 0x1,
-    OMX_VIDEO_VP9Profile1       = 0x2,
-    OMX_VIDEO_VP9Profile2       = 0x4,
-    OMX_VIDEO_VP9Profile3       = 0x8,
-    // HDR profiles also support passing HDR metadata
-    OMX_VIDEO_VP9Profile2HDR    = 0x1000,
-    OMX_VIDEO_VP9Profile3HDR    = 0x2000,
-    OMX_VIDEO_VP9ProfileUnknown = 0x6EFFFFFF,
-    OMX_VIDEO_VP9ProfileMax     = 0x7FFFFFFF
-} OMX_VIDEO_VP9PROFILETYPE;
-
-/** VP9 levels */
-typedef enum OMX_VIDEO_VP9LEVELTYPE {
-    OMX_VIDEO_VP9Level1       = 0x1,
-    OMX_VIDEO_VP9Level11      = 0x2,
-    OMX_VIDEO_VP9Level2       = 0x4,
-    OMX_VIDEO_VP9Level21      = 0x8,
-    OMX_VIDEO_VP9Level3       = 0x10,
-    OMX_VIDEO_VP9Level31      = 0x20,
-    OMX_VIDEO_VP9Level4       = 0x40,
-    OMX_VIDEO_VP9Level41      = 0x80,
-    OMX_VIDEO_VP9Level5       = 0x100,
-    OMX_VIDEO_VP9Level51      = 0x200,
-    OMX_VIDEO_VP9Level52      = 0x400,
-    OMX_VIDEO_VP9Level6       = 0x800,
-    OMX_VIDEO_VP9Level61      = 0x1000,
-    OMX_VIDEO_VP9Level62      = 0x2000,
-    OMX_VIDEO_VP9LevelUnknown = 0x6EFFFFFF,
-    OMX_VIDEO_VP9LevelMax     = 0x7FFFFFFF
-} OMX_VIDEO_VP9LEVELTYPE;
-
 /** VP8 Param */
 typedef struct OMX_VIDEO_PARAM_VP8TYPE {
     OMX_U32 nSize;
@@ -152,7 +119,7 @@
 } OMX_VIDEO_ANDROID_VPXTEMPORALLAYERPATTERNTYPE;
 
 /**
- * Android specific VP8 encoder params
+ * Android specific VP8/VP9 encoder params
  *
  * STRUCT MEMBERS:
  *  nSize                      : Size of the structure in bytes
@@ -182,6 +149,59 @@
     OMX_U32 nMaxQuantizer;
 } OMX_VIDEO_PARAM_ANDROID_VP8ENCODERTYPE;
 
+/** VP9 profiles */
+typedef enum OMX_VIDEO_VP9PROFILETYPE {
+    OMX_VIDEO_VP9Profile0 = 0x1,
+    OMX_VIDEO_VP9Profile1 = 0x2,
+    OMX_VIDEO_VP9Profile2 = 0x4,
+    OMX_VIDEO_VP9Profile3 = 0x8,
+    // HDR profiles also support passing HDR metadata
+    OMX_VIDEO_VP9Profile2HDR = 0x1000,
+    OMX_VIDEO_VP9Profile3HDR = 0x2000,
+    OMX_VIDEO_VP9ProfileUnknown = 0x6EFFFFFF,
+    OMX_VIDEO_VP9ProfileMax = 0x7FFFFFFF
+} OMX_VIDEO_VP9PROFILETYPE;
+
+/** VP9 levels */
+typedef enum OMX_VIDEO_VP9LEVELTYPE {
+    OMX_VIDEO_VP9Level1  = 0x0,
+    OMX_VIDEO_VP9Level11 = 0x1,
+    OMX_VIDEO_VP9Level2  = 0x2,
+    OMX_VIDEO_VP9Level21 = 0x4,
+    OMX_VIDEO_VP9Level3  = 0x8,
+    OMX_VIDEO_VP9Level31 = 0x10,
+    OMX_VIDEO_VP9Level4  = 0x20,
+    OMX_VIDEO_VP9Level41 = 0x40,
+    OMX_VIDEO_VP9Level5  = 0x80,
+    OMX_VIDEO_VP9Level51 = 0x100,
+    OMX_VIDEO_VP9Level52 = 0x200,
+    OMX_VIDEO_VP9Level6  = 0x400,
+    OMX_VIDEO_VP9Level61 = 0x800,
+    OMX_VIDEO_VP9Level62 = 0x1000,
+    OMX_VIDEO_VP9LevelUnknown = 0x6EFFFFFF,
+    OMX_VIDEO_VP9LevelMax = 0x7FFFFFFF
+} OMX_VIDEO_VP9LEVELTYPE;
+
+/**
+* VP9 Parameters.
+*   Encoder specific parameters (decoders should ignore these fields):
+*     - bErrorResilientMode
+*     - nTileRows
+*     - nTileColumns
+*     - bEnableFrameParallelDecoding
+*/
+typedef struct OMX_VIDEO_PARAM_VP9TYPE {
+    OMX_U32 nSize;
+    OMX_VERSIONTYPE nVersion;
+    OMX_U32 nPortIndex;
+    OMX_VIDEO_VP9PROFILETYPE eProfile;
+    OMX_VIDEO_VP9LEVELTYPE eLevel;
+    OMX_BOOL bErrorResilientMode;
+    OMX_U32 nTileRows;
+    OMX_U32 nTileColumns;
+    OMX_BOOL bEnableFrameParallelDecoding;
+} OMX_VIDEO_PARAM_VP9TYPE;
+
 /** HEVC Profile enum type */
 typedef enum OMX_VIDEO_HEVCPROFILETYPE {
     OMX_VIDEO_HEVCProfileUnknown      = 0x0,
diff --git a/include/private/gui/LayerState.h b/include/private/gui/LayerState.h
index 4b3fcc6..292dd3b 100644
--- a/include/private/gui/LayerState.h
+++ b/include/private/gui/LayerState.h
@@ -74,10 +74,10 @@
     status_t    read(const Parcel& input);
 
             struct matrix22_t {
-                float   dsdx;
-                float   dtdx;
-                float   dsdy;
-                float   dtdy;
+                float   dsdx{0};
+                float   dtdx{0};
+                float   dsdy{0};
+                float   dtdy{0};
             };
             sp<IBinder>     surface;
             uint32_t        what;
diff --git a/include/ui/DisplayInfo.h b/include/ui/DisplayInfo.h
index 799944f..842806e 100644
--- a/include/ui/DisplayInfo.h
+++ b/include/ui/DisplayInfo.h
@@ -26,16 +26,16 @@
 namespace android {
 
 struct DisplayInfo {
-    uint32_t w;
-    uint32_t h;
-    float xdpi;
-    float ydpi;
-    float fps;
-    float density;
-    uint8_t orientation;
-    bool secure;
-    nsecs_t appVsyncOffset;
-    nsecs_t presentationDeadline;
+    uint32_t w{0};
+    uint32_t h{0};
+    float xdpi{0};
+    float ydpi{0};
+    float fps{0};
+    float density{0};
+    uint8_t orientation{0};
+    bool secure{false};
+    nsecs_t appVsyncOffset{0};
+    nsecs_t presentationDeadline{0};
 };
 
 /* Display orientations as defined in Surface.java and ISurfaceComposer.h. */
diff --git a/include/ui/DisplayStatInfo.h b/include/ui/DisplayStatInfo.h
index 0549a83..09543ec 100644
--- a/include/ui/DisplayStatInfo.h
+++ b/include/ui/DisplayStatInfo.h
@@ -22,8 +22,8 @@
 namespace android {
 
 struct DisplayStatInfo {
-    nsecs_t vsyncTime;
-    nsecs_t vsyncPeriod;
+    nsecs_t vsyncTime{0};
+    nsecs_t vsyncPeriod{0};
 };
 
 }; // namespace android
diff --git a/include/ui/GrallocAllocator.h b/include/ui/GrallocAllocator.h
new file mode 100644
index 0000000..23b78ed
--- /dev/null
+++ b/include/ui/GrallocAllocator.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_UI_GRALLOC_ALLOCATOR_H
+#define ANDROID_UI_GRALLOC_ALLOCATOR_H
+
+#include <string>
+
+#include <android/hardware/graphics/allocator/2.0/IAllocator.h>
+#include <utils/StrongPointer.h>
+
+namespace android {
+
+namespace Gralloc2 {
+
+using hardware::graphics::allocator::V2_0::Error;
+using hardware::graphics::allocator::V2_0::PixelFormat;
+using hardware::graphics::allocator::V2_0::ProducerUsage;
+using hardware::graphics::allocator::V2_0::ConsumerUsage;
+using hardware::graphics::allocator::V2_0::BufferDescriptor;
+using hardware::graphics::allocator::V2_0::Buffer;
+using hardware::graphics::allocator::V2_0::IAllocator;
+
+// Allocator is a wrapper to IAllocator, a proxy to server-side allocator.
+class Allocator {
+public:
+    Allocator();
+
+    // this will be removed and Allocator will be always valid
+    bool valid() const { return (mService != nullptr); }
+
+    std::string dumpDebugInfo() const;
+
+    Error createBufferDescriptor(
+            const IAllocator::BufferDescriptorInfo& descriptorInfo,
+            BufferDescriptor& descriptor) const;
+    void destroyBufferDescriptor(BufferDescriptor descriptor) const;
+
+    Error allocate(BufferDescriptor descriptor, Buffer& buffer) const;
+    void free(Buffer buffer) const;
+
+    Error exportHandle(BufferDescriptor descriptor, Buffer buffer,
+            native_handle_t*& bufferHandle) const;
+
+private:
+    sp<IAllocator> mService;
+};
+
+} // namespace Gralloc2
+
+} // namespace android
+
+#endif // ANDROID_UI_GRALLOC_ALLOCATOR_H
diff --git a/include/ui/GrallocMapper.h b/include/ui/GrallocMapper.h
new file mode 100644
index 0000000..5517449
--- /dev/null
+++ b/include/ui/GrallocMapper.h
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_UI_GRALLOC_MAPPER_H
+#define ANDROID_UI_GRALLOC_MAPPER_H
+
+#include <memory>
+
+#include <android/hardware/graphics/mapper/2.0/IMapper.h>
+#include <system/window.h>
+
+namespace android {
+
+namespace Gralloc2 {
+
+using hardware::graphics::allocator::V2_0::Error;
+using hardware::graphics::allocator::V2_0::PixelFormat;
+using hardware::graphics::allocator::V2_0::ProducerUsage;
+using hardware::graphics::allocator::V2_0::ConsumerUsage;
+using hardware::graphics::mapper::V2_0::FlexLayout;
+using hardware::graphics::mapper::V2_0::BackingStore;
+using hardware::graphics::mapper::V2_0::Device;
+using hardware::graphics::mapper::V2_0::IMapper;
+
+// Mapper is a wrapper to IMapper, a client-side graphics buffer mapper.
+class Mapper {
+public:
+    Mapper();
+    ~Mapper();
+
+    // this will be removed and Mapper will be always valid
+    bool valid() const { return (mMapper != nullptr); }
+
+    Error retain(buffer_handle_t handle) const
+    {
+        return mMapper->retain(mDevice, handle);
+    }
+
+    void release(buffer_handle_t handle) const;
+
+    Error getDimensions(buffer_handle_t handle,
+            uint32_t& width, uint32_t& height) const
+    {
+        return mMapper->getDimensions(mDevice, handle, &width, &height);
+    }
+
+    Error getFormat(buffer_handle_t handle,
+            PixelFormat& format) const
+    {
+        return mMapper->getFormat(mDevice, handle, &format);
+    }
+
+    Error getProducerUsageMask(buffer_handle_t handle,
+            uint64_t& usageMask) const
+    {
+        return mMapper->getProducerUsageMask(mDevice, handle, &usageMask);
+    }
+
+    Error getConsumerUsageMask(buffer_handle_t handle,
+            uint64_t& usageMask) const
+    {
+        return mMapper->getConsumerUsageMask(mDevice, handle, &usageMask);
+    }
+
+    Error getBackingStore(buffer_handle_t handle,
+            BackingStore& store) const
+    {
+        return mMapper->getBackingStore(mDevice, handle, &store);
+    }
+
+    Error getStride(buffer_handle_t handle, uint32_t& stride) const
+    {
+        return mMapper->getStride(mDevice, handle, &stride);
+    }
+
+    Error getNumFlexPlanes(buffer_handle_t handle, uint32_t& numPlanes) const
+    {
+        return mMapper->getNumFlexPlanes(mDevice, handle, &numPlanes);
+    }
+
+    Error lock(buffer_handle_t handle,
+            uint64_t producerUsageMask,
+            uint64_t consumerUsageMask,
+            const Device::Rect& accessRegion,
+            int acquireFence, void*& data) const
+    {
+        return mMapper->lock(mDevice, handle,
+                producerUsageMask, consumerUsageMask,
+                &accessRegion, acquireFence, &data);
+    }
+
+    Error lock(buffer_handle_t handle,
+            uint64_t producerUsageMask,
+            uint64_t consumerUsageMask,
+            const Device::Rect& accessRegion,
+            int acquireFence, FlexLayout& flexLayout) const
+    {
+        return mMapper->lockFlex(mDevice, handle,
+                producerUsageMask, consumerUsageMask,
+                &accessRegion, acquireFence, &flexLayout);
+    }
+
+    int unlock(buffer_handle_t handle) const;
+
+private:
+    const IMapper* mMapper;
+    Device* mDevice;
+};
+
+} // namespace Gralloc2
+
+} // namespace android
+
+#endif // ANDROID_UI_GRALLOC_MAPPER_H
diff --git a/include/ui/GraphicBufferAllocator.h b/include/ui/GraphicBufferAllocator.h
index 28d0238..9cc5806 100644
--- a/include/ui/GraphicBufferAllocator.h
+++ b/include/ui/GraphicBufferAllocator.h
@@ -32,7 +32,12 @@
 
 namespace android {
 
+namespace Gralloc2 {
+class Allocator;
+}
+
 class Gralloc1Loader;
+class GraphicBufferMapper;
 class String8;
 
 class GraphicBufferAllocator : public Singleton<GraphicBufferAllocator>
@@ -86,6 +91,9 @@
     GraphicBufferAllocator();
     ~GraphicBufferAllocator();
 
+    const std::unique_ptr<const Gralloc2::Allocator> mAllocator;
+    GraphicBufferMapper& mMapper;
+
     std::unique_ptr<Gralloc1::Loader> mLoader;
     std::unique_ptr<Gralloc1::Device> mDevice;
 };
diff --git a/include/ui/GraphicBufferMapper.h b/include/ui/GraphicBufferMapper.h
index a25809c..b6de1b2 100644
--- a/include/ui/GraphicBufferMapper.h
+++ b/include/ui/GraphicBufferMapper.h
@@ -28,6 +28,10 @@
 
 // ---------------------------------------------------------------------------
 
+namespace Gralloc2 {
+class Mapper;
+}
+
 class Rect;
 
 class GraphicBufferMapper : public Singleton<GraphicBufferMapper>
@@ -57,11 +61,18 @@
 
     status_t unlockAsync(buffer_handle_t handle, int *fenceFd);
 
+    const Gralloc2::Mapper& getGrallocMapper() const
+    {
+        return *mMapper;
+    }
+
 private:
     friend class Singleton<GraphicBufferMapper>;
 
     GraphicBufferMapper();
 
+    const std::unique_ptr<const Gralloc2::Mapper> mMapper;
+
     std::unique_ptr<Gralloc1::Loader> mLoader;
     std::unique_ptr<Gralloc1::Device> mDevice;
 };
diff --git a/libs/binder/Android.bp b/libs/binder/Android.bp
index 4780757..175e982 100644
--- a/libs/binder/Android.bp
+++ b/libs/binder/Android.bp
@@ -32,6 +32,7 @@
         "IProcessInfoService.cpp",
         "IResultReceiver.cpp",
         "IServiceManager.cpp",
+        "IShellCallback.cpp",
         "MemoryBase.cpp",
         "MemoryDealer.cpp",
         "MemoryHeapBase.cpp",
diff --git a/libs/binder/Binder.cpp b/libs/binder/Binder.cpp
index 7ce2a31..890ef30 100644
--- a/libs/binder/Binder.cpp
+++ b/libs/binder/Binder.cpp
@@ -21,6 +21,7 @@
 #include <binder/BpBinder.h>
 #include <binder/IInterface.h>
 #include <binder/IResultReceiver.h>
+#include <binder/IShellCallback.h>
 #include <binder/Parcel.h>
 
 #include <stdio.h>
@@ -62,7 +63,8 @@
 
 
 status_t IBinder::shellCommand(const sp<IBinder>& target, int in, int out, int err,
-    Vector<String16>& args, const sp<IResultReceiver>& resultReceiver)
+    Vector<String16>& args, const sp<IShellCallback>& callback,
+    const sp<IResultReceiver>& resultReceiver)
 {
     Parcel send;
     Parcel reply;
@@ -74,6 +76,7 @@
     for (size_t i = 0; i < numArgs; i++) {
         send.writeString16(args[i]);
     }
+    send.writeStrongBinder(callback != NULL ? IInterface::asBinder(callback) : NULL);
     send.writeStrongBinder(resultReceiver != NULL ? IInterface::asBinder(resultReceiver) : NULL);
     return target->transact(SHELL_COMMAND_TRANSACTION, send, &reply);
 }
@@ -232,6 +235,8 @@
             for (int i = 0; i < argc && data.dataAvail() > 0; i++) {
                args.add(data.readString16());
             }
+            sp<IShellCallback> shellCallback = IShellCallback::asInterface(
+                    data.readStrongBinder());
             sp<IResultReceiver> resultReceiver = IResultReceiver::asInterface(
                     data.readStrongBinder());
 
diff --git a/libs/binder/IMediaResourceMonitor.cpp b/libs/binder/IMediaResourceMonitor.cpp
index 4800f5b..77e3d23 100644
--- a/libs/binder/IMediaResourceMonitor.cpp
+++ b/libs/binder/IMediaResourceMonitor.cpp
@@ -25,7 +25,7 @@
 
 class BpMediaResourceMonitor : public BpInterface<IMediaResourceMonitor> {
 public:
-    BpMediaResourceMonitor(const sp<IBinder>& impl)
+    explicit BpMediaResourceMonitor(const sp<IBinder>& impl)
         : BpInterface<IMediaResourceMonitor>(impl) {}
 
     virtual void notifyResourceGranted(/*in*/ int32_t pid, /*in*/ const int32_t type)
diff --git a/libs/binder/IResultReceiver.cpp b/libs/binder/IResultReceiver.cpp
index 2a22b69..646809e 100644
--- a/libs/binder/IResultReceiver.cpp
+++ b/libs/binder/IResultReceiver.cpp
@@ -31,7 +31,7 @@
 class BpResultReceiver : public BpInterface<IResultReceiver>
 {
 public:
-    BpResultReceiver(const sp<IBinder>& impl)
+    explicit BpResultReceiver(const sp<IBinder>& impl)
         : BpInterface<IResultReceiver>(impl)
     {
     }
diff --git a/libs/binder/IShellCallback.cpp b/libs/binder/IShellCallback.cpp
new file mode 100644
index 0000000..8b97301
--- /dev/null
+++ b/libs/binder/IShellCallback.cpp
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "ShellCallback"
+
+#include <binder/IShellCallback.h>
+
+#include <utils/Log.h>
+#include <binder/Parcel.h>
+#include <utils/String8.h>
+
+#include <private/binder/Static.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------
+
+class BpShellCallback : public BpInterface<IShellCallback>
+{
+public:
+    explicit BpShellCallback(const sp<IBinder>& impl)
+        : BpInterface<IShellCallback>(impl)
+    {
+    }
+
+    virtual int openOutputFile(const String16& path, const String16& seLinuxContext) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IShellCallback::getInterfaceDescriptor());
+        data.writeString16(path);
+        data.writeString16(seLinuxContext);
+        remote()->transact(OP_OPEN_OUTPUT_FILE, data, &reply, 0);
+        reply.readExceptionCode();
+        int fd = reply.readParcelFileDescriptor();
+        return fd >= 0 ? dup(fd) : fd;
+
+    }
+};
+
+IMPLEMENT_META_INTERFACE(ShellCallback, "com.android.internal.os.IShellCallback");
+
+// ----------------------------------------------------------------------
+
+status_t BnShellCallback::onTransact(
+    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
+{
+    switch(code) {
+        case OP_OPEN_OUTPUT_FILE: {
+            CHECK_INTERFACE(IShellCallback, data, reply);
+            String16 path(data.readString16());
+            String16 seLinuxContext(data.readString16());
+            int fd = openOutputFile(path, seLinuxContext);
+            if (reply != NULL) {
+                reply->writeNoException();
+                if (fd >= 0) {
+                    reply->writeInt32(1);
+                    reply->writeParcelFileDescriptor(fd, true);
+                } else {
+                    reply->writeInt32(0);
+                }
+            } else if (fd >= 0) {
+                close(fd);
+            }
+            return NO_ERROR;
+        } break;
+        default:
+            return BBinder::onTransact(code, data, reply, flags);
+    }
+}
+
+}; // namespace android
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index 061cb08..601df46 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -1153,6 +1153,12 @@
     return err;
 }
 
+status_t Parcel::writeParcelFileDescriptor(int fd, bool takeOwnership)
+{
+    writeInt32(0);
+    return writeFileDescriptor(fd, takeOwnership);
+}
+
 status_t Parcel::writeUniqueFileDescriptor(const base::unique_fd& fd) {
     return writeDupFileDescriptor(fd.get());
 }
@@ -1427,13 +1433,13 @@
         return status;
     }
 
-    const void* data = parcel->readInplace(size);
+    T* data = const_cast<T*>(reinterpret_cast<const T*>(parcel->readInplace(size)));
     if (!data) {
         status = BAD_VALUE;
         return status;
     }
-    val->resize(size);
-    memcpy(val->data(), data, size);
+    val->reserve(size);
+    val->insert(val->end(), data, data + size);
 
     return status;
 }
@@ -1984,7 +1990,6 @@
     return h;
 }
 
-
 int Parcel::readFileDescriptor() const
 {
     const flat_binder_object* flat = readObject(true);
@@ -1996,6 +2001,17 @@
     return BAD_TYPE;
 }
 
+int Parcel::readParcelFileDescriptor() const
+{
+    int32_t hasComm = readInt32();
+    int fd = readFileDescriptor();
+    if (hasComm != 0) {
+        // skip
+        readFileDescriptor();
+    }
+    return fd;
+}
+
 status_t Parcel::readUniqueFileDescriptor(base::unique_fd* val) const
 {
     int got = readFileDescriptor();
diff --git a/libs/binder/tests/binderLibTest.cpp b/libs/binder/tests/binderLibTest.cpp
index 17479ca..cb0e965 100644
--- a/libs/binder/tests/binderLibTest.cpp
+++ b/libs/binder/tests/binderLibTest.cpp
@@ -44,6 +44,7 @@
     BINDER_LIB_TEST_ADD_SERVER,
     BINDER_LIB_TEST_CALL_BACK,
     BINDER_LIB_TEST_NOP_CALL_BACK,
+    BINDER_LIB_TEST_GET_SELF_TRANSACTION,
     BINDER_LIB_TEST_GET_ID_TRANSACTION,
     BINDER_LIB_TEST_INDIRECT_TRANSACTION,
     BINDER_LIB_TEST_SET_ERROR_TRANSACTION,
@@ -55,6 +56,7 @@
     BINDER_LIB_TEST_EXIT_TRANSACTION,
     BINDER_LIB_TEST_DELAYED_EXIT_TRANSACTION,
     BINDER_LIB_TEST_GET_PTR_SIZE_TRANSACTION,
+    BINDER_LIB_TEST_CREATE_BINDER_TRANSACTION,
 };
 
 pid_t start_server_process(int arg2)
@@ -387,7 +389,7 @@
 
     ret = reply.readInt32(&count);
     ASSERT_EQ(NO_ERROR, ret);
-    EXPECT_EQ(ARRAY_SIZE(serverId), count);
+    EXPECT_EQ(ARRAY_SIZE(serverId), (size_t)count);
 
     for (size_t i = 0; i < (size_t)count; i++) {
         BinderLibTestBundle replyi(&reply);
@@ -437,7 +439,7 @@
 
     ret = reply.readInt32(&count);
     ASSERT_EQ(NO_ERROR, ret);
-    EXPECT_EQ(ARRAY_SIZE(serverId), count);
+    EXPECT_EQ(ARRAY_SIZE(serverId), (size_t)count);
 
     for (size_t i = 0; i < (size_t)count; i++) {
         int32_t counti;
@@ -629,7 +631,7 @@
     }
 
     ret = read(pipefd[0], buf, sizeof(buf));
-    EXPECT_EQ(sizeof(buf), ret);
+    EXPECT_EQ(sizeof(buf), (size_t)ret);
     EXPECT_EQ(write_value, buf[0]);
 
     waitForReadData(pipefd[0], 5000); /* wait for other proccess to close pipe */
@@ -668,6 +670,62 @@
     EXPECT_GE(ret, 0);
 }
 
+TEST_F(BinderLibTest, CheckHandleZeroBinderHighBitsZeroCookie) {
+    status_t ret;
+    Parcel data, reply;
+
+    ret = m_server->transact(BINDER_LIB_TEST_GET_SELF_TRANSACTION, data, &reply);
+    EXPECT_EQ(NO_ERROR, ret);
+
+    const flat_binder_object *fb = reply.readObject(false);
+    ASSERT_TRUE(fb != NULL);
+    EXPECT_EQ(fb->type, BINDER_TYPE_HANDLE);
+    EXPECT_EQ(ProcessState::self()->getStrongProxyForHandle(fb->handle), m_server);
+    EXPECT_EQ(fb->cookie, (binder_uintptr_t)0);
+    EXPECT_EQ(fb->binder >> 32, (binder_uintptr_t)0);
+}
+
+TEST_F(BinderLibTest, FreedBinder) {
+    status_t ret;
+
+    sp<IBinder> server = addServer();
+    ASSERT_TRUE(server != NULL);
+
+    __u32 freedHandle;
+    wp<IBinder> keepFreedBinder;
+    {
+        Parcel data, reply;
+        data.writeBool(false); /* request weak reference */
+        ret = server->transact(BINDER_LIB_TEST_CREATE_BINDER_TRANSACTION, data, &reply);
+        ASSERT_EQ(NO_ERROR, ret);
+        struct flat_binder_object *freed = (struct flat_binder_object *)(reply.data());
+        freedHandle = freed->handle;
+        /* Add a weak ref to the freed binder so the driver does not
+         * delete its reference to it - otherwise the transaction
+         * fails regardless of whether the driver is fixed.
+         */
+        keepFreedBinder = reply.readWeakBinder();
+    }
+    {
+        Parcel data, reply;
+        data.writeStrongBinder(server);
+        /* Replace original handle with handle to the freed binder */
+        struct flat_binder_object *strong = (struct flat_binder_object *)(data.data());
+        __u32 oldHandle = strong->handle;
+        strong->handle = freedHandle;
+        ret = server->transact(BINDER_LIB_TEST_ADD_STRONG_REF_TRANSACTION, data, &reply);
+        /* Returns DEAD_OBJECT (-32) if target crashes and
+         * FAILED_TRANSACTION if the driver rejects the invalid
+         * object.
+         */
+        EXPECT_EQ((status_t)FAILED_TRANSACTION, ret);
+        /* Restore original handle so parcel destructor does not use
+         * the wrong handle.
+         */
+        strong->handle = oldHandle;
+    }
+}
+
 class BinderLibTestService : public BBinder
 {
     public:
@@ -769,6 +827,9 @@
                 binder->transact(BINDER_LIB_TEST_CALL_BACK, data2, &reply2);
                 return NO_ERROR;
             }
+            case BINDER_LIB_TEST_GET_SELF_TRANSACTION:
+                reply->writeStrongBinder(this);
+                return NO_ERROR;
             case BINDER_LIB_TEST_GET_ID_TRANSACTION:
                 reply->writeInt32(m_id);
                 return NO_ERROR;
@@ -882,6 +943,16 @@
                 while (wait(NULL) != -1 || errno != ECHILD)
                     ;
                 exit(EXIT_SUCCESS);
+            case BINDER_LIB_TEST_CREATE_BINDER_TRANSACTION: {
+                bool strongRef = data.readBool();
+                sp<IBinder> binder = new BBinder();
+                if (strongRef) {
+                    reply->writeStrongBinder(binder);
+                } else {
+                    reply->writeWeakBinder(binder);
+                }
+                return NO_ERROR;
+            }
             default:
                 return UNKNOWN_TRANSACTION;
             };
diff --git a/libs/gui/BufferItem.cpp b/libs/gui/BufferItem.cpp
index 1357a4a..669124e 100644
--- a/libs/gui/BufferItem.cpp
+++ b/libs/gui/BufferItem.cpp
@@ -81,6 +81,9 @@
     addAligned(size, mIsDroppable);
     addAligned(size, mAcquireCalled);
     addAligned(size, mTransformToDisplayInverse);
+    addAligned(size, mAutoRefresh);
+    addAligned(size, mQueuedBuffer);
+    addAligned(size, mIsStale);
     return size;
 }
 
@@ -166,6 +169,9 @@
     writeAligned(buffer, size, mIsDroppable);
     writeAligned(buffer, size, mAcquireCalled);
     writeAligned(buffer, size, mTransformToDisplayInverse);
+    writeAligned(buffer, size, mAutoRefresh);
+    writeAligned(buffer, size, mQueuedBuffer);
+    writeAligned(buffer, size, mIsStale);
 
     return NO_ERROR;
 }
@@ -227,6 +233,9 @@
     readAligned(buffer, size, mIsDroppable);
     readAligned(buffer, size, mAcquireCalled);
     readAligned(buffer, size, mTransformToDisplayInverse);
+    readAligned(buffer, size, mAutoRefresh);
+    readAligned(buffer, size, mQueuedBuffer);
+    readAligned(buffer, size, mIsStale);
 
     return NO_ERROR;
 }
diff --git a/libs/gui/BufferQueue.cpp b/libs/gui/BufferQueue.cpp
index 6de98f5..47f5eba 100644
--- a/libs/gui/BufferQueue.cpp
+++ b/libs/gui/BufferQueue.cpp
@@ -72,7 +72,8 @@
 
 void BufferQueue::createBufferQueue(sp<IGraphicBufferProducer>* outProducer,
         sp<IGraphicBufferConsumer>* outConsumer,
-        const sp<IGraphicBufferAlloc>& allocator) {
+        const sp<IGraphicBufferAlloc>& allocator,
+        bool consumerIsSurfaceFlinger) {
     LOG_ALWAYS_FATAL_IF(outProducer == NULL,
             "BufferQueue: outProducer must not be NULL");
     LOG_ALWAYS_FATAL_IF(outConsumer == NULL,
@@ -82,7 +83,7 @@
     LOG_ALWAYS_FATAL_IF(core == NULL,
             "BufferQueue: failed to create BufferQueueCore");
 
-    sp<IGraphicBufferProducer> producer(new BufferQueueProducer(core));
+    sp<IGraphicBufferProducer> producer(new BufferQueueProducer(core, consumerIsSurfaceFlinger));
     LOG_ALWAYS_FATAL_IF(producer == NULL,
             "BufferQueue: failed to create BufferQueueProducer");
 
diff --git a/libs/gui/BufferQueueCore.cpp b/libs/gui/BufferQueueCore.cpp
index d74d32c..6e6cce2 100644
--- a/libs/gui/BufferQueueCore.cpp
+++ b/libs/gui/BufferQueueCore.cpp
@@ -93,6 +93,7 @@
     mSharedBufferSlot(INVALID_BUFFER_SLOT),
     mSharedBufferCache(Rect::INVALID_RECT, 0, NATIVE_WINDOW_SCALING_MODE_FREEZE,
             HAL_DATASPACE_UNKNOWN),
+    mLastQueuedSlot(INVALID_BUFFER_SLOT),
     mUniqueId(getUniqueId())
 {
     if (allocator == NULL) {
diff --git a/libs/gui/BufferQueueProducer.cpp b/libs/gui/BufferQueueProducer.cpp
index f8f3872..90b4b9d 100644
--- a/libs/gui/BufferQueueProducer.cpp
+++ b/libs/gui/BufferQueueProducer.cpp
@@ -42,12 +42,15 @@
 
 namespace android {
 
-BufferQueueProducer::BufferQueueProducer(const sp<BufferQueueCore>& core) :
+BufferQueueProducer::BufferQueueProducer(const sp<BufferQueueCore>& core,
+        bool consumerIsSurfaceFlinger) :
     mCore(core),
     mSlots(core->mSlots),
     mConsumerName(),
     mStickyTransform(0),
+    mConsumerIsSurfaceFlinger(consumerIsSurfaceFlinger),
     mLastQueueBufferFence(Fence::NO_FENCE),
+    mLastQueuedTransform(0),
     mCallbackMutex(),
     mNextCallbackTicket(0),
     mCurrentCallbackTicket(0),
@@ -915,9 +918,14 @@
         VALIDATE_CONSISTENCY();
     } // Autolock scope
 
-    // Don't send the GraphicBuffer through the callback, and don't send
-    // the slot number, since the consumer shouldn't need it
-    item.mGraphicBuffer.clear();
+    // It is okay not to clear the GraphicBuffer when the consumer is SurfaceFlinger because
+    // it is guaranteed that the BufferQueue is inside SurfaceFlinger's process and
+    // there will be no Binder call
+    if (!mConsumerIsSurfaceFlinger) {
+        item.mGraphicBuffer.clear();
+    }
+
+    // Don't send the slot number through the callback since the consumer shouldn't need it
     item.mSlot = BufferItem::INVALID_BUFFER_SLOT;
 
     // Call back without the main BufferQueue lock held, but with the callback
diff --git a/libs/gui/ISurfaceComposer.cpp b/libs/gui/ISurfaceComposer.cpp
index 0a8e6a5..6c1662c 100644
--- a/libs/gui/ISurfaceComposer.cpp
+++ b/libs/gui/ISurfaceComposer.cpp
@@ -383,6 +383,48 @@
         }
         return result;
     }
+
+    virtual status_t enableVSyncInjections(bool enable) {
+        Parcel data, reply;
+        status_t result = data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
+        if (result != NO_ERROR) {
+            ALOGE("enableVSyncInjections failed to writeInterfaceToken: %d", result);
+            return result;
+        }
+        result = data.writeBool(enable);
+        if (result != NO_ERROR) {
+            ALOGE("enableVSyncInjections failed to writeBool: %d", result);
+            return result;
+        }
+        result = remote()->transact(BnSurfaceComposer::ENABLE_VSYNC_INJECTIONS,
+                data, &reply, TF_ONE_WAY);
+        if (result != NO_ERROR) {
+            ALOGE("enableVSyncInjections failed to transact: %d", result);
+            return result;
+        }
+        return result;
+    }
+
+    virtual status_t injectVSync(nsecs_t when) {
+        Parcel data, reply;
+        status_t result = data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
+        if (result != NO_ERROR) {
+            ALOGE("injectVSync failed to writeInterfaceToken: %d", result);
+            return result;
+        }
+        result = data.writeInt64(when);
+        if (result != NO_ERROR) {
+            ALOGE("injectVSync failed to writeInt64: %d", result);
+            return result;
+        }
+        result = remote()->transact(BnSurfaceComposer::INJECT_VSYNC, data, &reply, TF_ONE_WAY);
+        if (result != NO_ERROR) {
+            ALOGE("injectVSync failed to transact: %d", result);
+            return result;
+        }
+        return result;
+    }
+
 };
 
 // Out-of-line virtual method definition to trigger vtable emission in this
@@ -635,6 +677,26 @@
             }
             return NO_ERROR;
         }
+        case ENABLE_VSYNC_INJECTIONS: {
+            CHECK_INTERFACE(ISurfaceComposer, data, reply);
+            bool enable = false;
+            status_t result = data.readBool(&enable);
+            if (result != NO_ERROR) {
+                ALOGE("enableVSyncInjections failed to readBool: %d", result);
+                return result;
+            }
+            return enableVSyncInjections(enable);
+        }
+        case INJECT_VSYNC: {
+            CHECK_INTERFACE(ISurfaceComposer, data, reply);
+            int64_t when = 0;
+            status_t result = data.readInt64(&when);
+            if (result != NO_ERROR) {
+                ALOGE("enableVSyncInjections failed to readInt64: %d", result);
+                return result;
+            }
+            return injectVSync(when);
+        }
         default: {
             return BBinder::onTransact(code, data, reply, flags);
         }
diff --git a/libs/gui/Surface.cpp b/libs/gui/Surface.cpp
index 8e6ab1c..351d184 100644
--- a/libs/gui/Surface.cpp
+++ b/libs/gui/Surface.cpp
@@ -1393,14 +1393,18 @@
         int isSingleBuffered;
         res = parcel->readInt32(&isSingleBuffered);
         if (res != OK) {
+            ALOGE("Can't read isSingleBuffered");
             return res;
         }
     }
 
     sp<IBinder> binder;
 
-    res = parcel->readStrongBinder(&binder);
-    if (res != OK) return res;
+    res = parcel->readNullableStrongBinder(&binder);
+    if (res != OK) {
+        ALOGE("%s: Can't read strong binder", __FUNCTION__);
+        return res;
+    }
 
     graphicBufferProducer = interface_cast<IGraphicBufferProducer>(binder);
 
diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index 43506e9..78afc76 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -129,6 +129,8 @@
     void openGlobalTransactionImpl();
     void closeGlobalTransactionImpl(bool synchronous);
     void setAnimationTransactionImpl();
+    status_t enableVSyncInjectionsImpl(bool enable);
+    status_t injectVSyncImpl(nsecs_t when);
 
     layer_state_t* getLayerStateLocked(
             const sp<SurfaceComposerClient>& client, const sp<IBinder>& id);
@@ -190,6 +192,14 @@
     static void closeGlobalTransaction(bool synchronous) {
         Composer::getInstance().closeGlobalTransactionImpl(synchronous);
     }
+
+    static status_t enableVSyncInjections(bool enable) {
+        return Composer::getInstance().enableVSyncInjectionsImpl(enable);
+    }
+
+    static status_t injectVSync(nsecs_t when) {
+        return Composer::getInstance().injectVSyncImpl(when);
+    }
 };
 
 ANDROID_SINGLETON_STATIC_INSTANCE(Composer);
@@ -253,6 +263,16 @@
    sm->setTransactionState(transaction, displayTransaction, flags);
 }
 
+status_t Composer::enableVSyncInjectionsImpl(bool enable) {
+    sp<ISurfaceComposer> sm(ComposerService::getComposerService());
+    return sm->enableVSyncInjections(enable);
+}
+
+status_t Composer::injectVSyncImpl(nsecs_t when) {
+    sp<ISurfaceComposer> sm(ComposerService::getComposerService());
+    return sm->injectVSync(when);
+}
+
 void Composer::setAnimationTransactionImpl() {
     Mutex::Autolock _l(mLock);
     mAnimation = true;
@@ -652,6 +672,14 @@
     Composer::setAnimationTransaction();
 }
 
+status_t SurfaceComposerClient::enableVSyncInjections(bool enable) {
+    return Composer::enableVSyncInjections(enable);
+}
+
+status_t SurfaceComposerClient::injectVSync(nsecs_t when) {
+    return Composer::injectVSync(when);
+}
+
 // ----------------------------------------------------------------------------
 
 status_t SurfaceComposerClient::setCrop(const sp<IBinder>& id, const Rect& crop) {
diff --git a/libs/ui/Android.bp b/libs/ui/Android.bp
index d5ff753..37b2873 100644
--- a/libs/ui/Android.bp
+++ b/libs/ui/Android.bp
@@ -45,6 +45,8 @@
         "FrameStats.cpp",
         "Gralloc1.cpp",
         "Gralloc1On0Adapter.cpp",
+        "GrallocAllocator.cpp",
+        "GrallocMapper.cpp",
         "GraphicBuffer.cpp",
         "GraphicBufferAllocator.cpp",
         "GraphicBufferMapper.cpp",
@@ -55,10 +57,17 @@
         "UiConfig.cpp",
     ],
 
+    static_libs: [
+        "android.hardware.graphics.mapper@2.0",
+    ],
+
     shared_libs: [
+        "android.hardware.graphics.allocator@2.0",
         "libbinder",
         "libcutils",
         "libhardware",
+        "libhidl",
+        "libhwbinder",
         "libsync",
         "libutils",
         "liblog",
diff --git a/libs/ui/GrallocAllocator.cpp b/libs/ui/GrallocAllocator.cpp
new file mode 100644
index 0000000..2eb1988
--- /dev/null
+++ b/libs/ui/GrallocAllocator.cpp
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "GrallocAllocator"
+
+#include <log/log.h>
+#include <ui/GrallocAllocator.h>
+
+namespace android {
+
+namespace Gralloc2 {
+
+// assume NO_RESOURCES when Status::isOk returns false
+constexpr Error kDefaultError = Error::NO_RESOURCES;
+
+Allocator::Allocator()
+{
+    mService = IAllocator::getService("gralloc");
+}
+
+std::string Allocator::dumpDebugInfo() const
+{
+    std::string info;
+
+    mService->dumpDebugInfo([&](const auto& tmpInfo) {
+        info = tmpInfo.c_str();
+    });
+
+    return info;
+}
+
+Error Allocator::createBufferDescriptor(
+        const IAllocator::BufferDescriptorInfo& descriptorInfo,
+        BufferDescriptor& descriptor) const
+{
+    Error error = kDefaultError;
+    mService->createDescriptor(descriptorInfo,
+            [&](const auto& tmpError, const auto& tmpDescriptor) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                descriptor = tmpDescriptor;
+            });
+
+    return error;
+}
+
+void Allocator::destroyBufferDescriptor(BufferDescriptor descriptor) const
+{
+    mService->destroyDescriptor(descriptor);
+}
+
+Error Allocator::allocate(BufferDescriptor descriptor, Buffer& buffer) const
+{
+    hardware::hidl_vec<BufferDescriptor> descriptors;
+    descriptors.setToExternal(&descriptor, 1);
+
+    Error error = kDefaultError;
+    auto status = mService->allocate(descriptors,
+            [&](const auto& tmpError, const auto& tmpBuffers) {
+                error = tmpError;
+                if (tmpError != Error::NONE) {
+                    return;
+                }
+
+                buffer = tmpBuffers[0];
+            });
+
+    return error;
+}
+
+void Allocator::free(Buffer buffer) const
+{
+    mService->free(buffer);
+}
+
+Error Allocator::exportHandle(BufferDescriptor descriptor, Buffer buffer,
+        native_handle_t*& bufferHandle) const
+{
+    Error error = kDefaultError;
+    auto status = mService->exportHandle(descriptor, buffer,
+            [&](const auto& tmpError, const auto& tmpBufferHandle) {
+                error = tmpError;
+                if (tmpError != Error::NONE) {
+                    return;
+                }
+
+                bufferHandle = native_handle_clone(tmpBufferHandle);
+                if (!bufferHandle) {
+                    error = Error::NO_RESOURCES;
+                }
+            });
+
+    return error;
+}
+
+} // namespace Gralloc2
+
+} // namespace android
diff --git a/libs/ui/GrallocMapper.cpp b/libs/ui/GrallocMapper.cpp
new file mode 100644
index 0000000..d568b68
--- /dev/null
+++ b/libs/ui/GrallocMapper.cpp
@@ -0,0 +1,118 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "GrallocMapper"
+
+#include <array>
+#include <string>
+
+#include <log/log.h>
+#include <ui/GrallocMapper.h>
+
+namespace android {
+
+namespace Gralloc2 {
+
+typedef const void*(*FetchInterface)(const char* name);
+
+static FetchInterface loadHalLib(const char* pkg_name)
+{
+    static const std::array<const char*, 3> sSearchDirs = {{
+        HAL_LIBRARY_PATH_ODM,
+        HAL_LIBRARY_PATH_VENDOR,
+        HAL_LIBRARY_PATH_SYSTEM,
+    }};
+    static const char sSymbolName[] = "HALLIB_FETCH_Interface";
+
+    void* handle = nullptr;
+    std::string path;
+    for (auto dir : sSearchDirs) {
+        path = dir;
+        path += pkg_name;
+        path += ".hallib.so";
+        handle = dlopen(path.c_str(), RTLD_LOCAL | RTLD_NOW);
+        if (handle) {
+            break;
+        }
+    }
+    if (!handle) {
+        return nullptr;
+    }
+
+    void* symbol = dlsym(handle, sSymbolName);
+    if (!symbol) {
+        ALOGE("%s is missing from %s", sSymbolName, path.c_str());
+        dlclose(handle);
+        return nullptr;
+    }
+
+    return reinterpret_cast<FetchInterface>(symbol);
+}
+
+Mapper::Mapper()
+    : mMapper(nullptr), mDevice(nullptr)
+{
+    static const char sHalLibName[] = "android.hardware.graphics.mapper";
+    static const char sSupportedInterface[] =
+        "android.hardware.graphics.mapper@2.0::IMapper";
+
+    FetchInterface fetchInterface = loadHalLib(sHalLibName);
+    if (!fetchInterface) {
+        return;
+    }
+
+    mMapper = static_cast<const IMapper*>(
+            fetchInterface(sSupportedInterface));
+    if (!mMapper) {
+        ALOGE("%s is not supported", sSupportedInterface);
+        return;
+    }
+
+    if (mMapper->createDevice(&mDevice) != Error::NONE) {
+        ALOGE("failed to create mapper device");
+        mMapper = nullptr;
+    }
+}
+
+Mapper::~Mapper()
+{
+    if (mMapper) {
+        mMapper->destroyDevice(mDevice);
+    }
+}
+
+void Mapper::release(buffer_handle_t handle) const
+{
+    auto error = mMapper->release(mDevice, handle);
+    ALOGE_IF(error != Error::NONE,
+            "release(%p) failed with %d", handle, error);
+}
+
+int Mapper::unlock(buffer_handle_t handle) const
+{
+    int releaseFence;
+    auto error = mMapper->unlock(mDevice, handle, &releaseFence);
+    if (error != Error::NONE) {
+        ALOGE("unlock(%p) failed with %d", handle, error);
+        releaseFence = -1;
+    }
+
+    return releaseFence;
+}
+
+} // namespace Gralloc2
+
+} // namespace android
diff --git a/libs/ui/GraphicBuffer.cpp b/libs/ui/GraphicBuffer.cpp
index 97b948d..6d72900 100644
--- a/libs/ui/GraphicBuffer.cpp
+++ b/libs/ui/GraphicBuffer.cpp
@@ -23,6 +23,7 @@
 #include <utils/Errors.h>
 #include <utils/Log.h>
 
+#include <ui/GrallocMapper.h>
 #include <ui/GraphicBuffer.h>
 #include <ui/GraphicBufferAllocator.h>
 #include <ui/GraphicBufferMapper.h>
@@ -108,8 +109,10 @@
 {
     if (mOwner == ownHandle) {
         mBufferMapper.unregisterBuffer(handle);
-        native_handle_close(handle);
-        native_handle_delete(const_cast<native_handle*>(handle));
+        if (!mBufferMapper.getGrallocMapper().valid()) {
+            native_handle_close(handle);
+            native_handle_delete(const_cast<native_handle*>(handle));
+        }
     } else if (mOwner == ownData) {
         GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
         allocator.free(handle);
diff --git a/libs/ui/GraphicBufferAllocator.cpp b/libs/ui/GraphicBufferAllocator.cpp
index edfff4d..693c7cb 100644
--- a/libs/ui/GraphicBufferAllocator.cpp
+++ b/libs/ui/GraphicBufferAllocator.cpp
@@ -26,6 +26,9 @@
 
 #include <ui/GraphicBufferAllocator.h>
 #include <ui/Gralloc1On0Adapter.h>
+#include <ui/GrallocAllocator.h>
+#include <ui/GrallocMapper.h>
+#include <ui/GraphicBufferMapper.h>
 
 namespace android {
 // ---------------------------------------------------------------------------
@@ -37,8 +40,14 @@
     GraphicBufferAllocator::alloc_rec_t> GraphicBufferAllocator::sAllocList;
 
 GraphicBufferAllocator::GraphicBufferAllocator()
-  : mLoader(std::make_unique<Gralloc1::Loader>()),
-    mDevice(mLoader->getDevice()) {}
+  : mAllocator(std::make_unique<Gralloc2::Allocator>()),
+    mMapper(GraphicBufferMapper::getInstance())
+{
+    if (!mAllocator->valid()) {
+        mLoader = std::make_unique<Gralloc1::Loader>();
+        mDevice = mLoader->getDevice();
+    }
+}
 
 GraphicBufferAllocator::~GraphicBufferAllocator() {}
 
@@ -70,7 +79,14 @@
     }
     snprintf(buffer, SIZE, "Total allocated (estimate): %.2f KB\n", total/1024.0f);
     result.append(buffer);
-    std::string deviceDump = mDevice->dump();
+
+    std::string deviceDump;
+    if (mAllocator->valid()) {
+        deviceDump = mAllocator->dumpDebugInfo();
+    } else {
+        deviceDump = mDevice->dump();
+    }
+
     result.append(deviceDump.c_str(), deviceDump.size());
 }
 
@@ -81,6 +97,103 @@
     ALOGD("%s", s.string());
 }
 
+namespace {
+
+class HalBuffer {
+public:
+    HalBuffer(const Gralloc2::Allocator* allocator,
+            uint32_t width, uint32_t height,
+            PixelFormat format, uint32_t usage)
+        : mAllocator(allocator), mBufferValid(false)
+    {
+        Gralloc2::IAllocator::BufferDescriptorInfo info = {};
+        info.width = width;
+        info.height = height;
+        info.format = static_cast<Gralloc2::PixelFormat>(format);
+        info.producerUsageMask = usage;
+        info.consumerUsageMask = usage;
+
+        Gralloc2::BufferDescriptor descriptor;
+        auto error = mAllocator->createBufferDescriptor(info, descriptor);
+        if (error != Gralloc2::Error::NONE) {
+            ALOGE("Failed to create desc (%u x %u) format %d usage %u: %d",
+                    width, height, format, usage, error);
+            return;
+        }
+
+        error = mAllocator->allocate(descriptor, mBuffer);
+        if (error == Gralloc2::Error::NOT_SHARED) {
+            error = Gralloc2::Error::NONE;
+        }
+
+        if (error != Gralloc2::Error::NONE) {
+            ALOGE("Failed to allocate (%u x %u) format %d usage %u: %d",
+                    width, height, format, usage, error);
+            mAllocator->destroyBufferDescriptor(descriptor);
+            return;
+        }
+
+        error = mAllocator->exportHandle(descriptor, mBuffer, mHandle);
+        if (error != Gralloc2::Error::NONE) {
+            ALOGE("Failed to export handle");
+            mAllocator->free(mBuffer);
+            mAllocator->destroyBufferDescriptor(descriptor);
+            return;
+        }
+
+        mAllocator->destroyBufferDescriptor(descriptor);
+
+        mBufferValid = true;
+    }
+
+    ~HalBuffer()
+    {
+        if (mBufferValid) {
+            if (mHandle) {
+                native_handle_close(mHandle);
+                native_handle_delete(mHandle);
+            }
+
+            mAllocator->free(mBuffer);
+        }
+    }
+
+    bool exportHandle(GraphicBufferMapper& mapper,
+            buffer_handle_t* handle, uint32_t* stride)
+    {
+        if (!mBufferValid) {
+            return false;
+        }
+
+        if (mapper.registerBuffer(mHandle)) {
+            return false;
+        }
+
+        *handle = mHandle;
+
+        auto error = mapper.getGrallocMapper().getStride(mHandle, *stride);
+        if (error != Gralloc2::Error::NONE) {
+            ALOGW("Failed to get stride from buffer: %d", error);
+            *stride = 0;
+        }
+
+        mHandle = nullptr;
+        mAllocator->free(mBuffer);
+        mBufferValid = false;
+
+        return true;
+    }
+
+private:
+    const Gralloc2::Allocator* mAllocator;
+
+    bool mBufferValid;
+    Gralloc2::Buffer mBuffer;
+    native_handle_t* mHandle;
+};
+
+} // namespace
+
 status_t GraphicBufferAllocator::allocate(uint32_t width, uint32_t height,
         PixelFormat format, uint32_t usage, buffer_handle_t* handle,
         uint32_t* stride, uint64_t graphicBufferId, std::string requestorName)
@@ -95,40 +208,51 @@
     // Filter out any usage bits that should not be passed to the gralloc module
     usage &= GRALLOC_USAGE_ALLOC_MASK;
 
-    auto descriptor = mDevice->createDescriptor();
-    auto error = descriptor->setDimensions(width, height);
-    if (error != GRALLOC1_ERROR_NONE) {
-        ALOGE("Failed to set dimensions to (%u, %u): %d", width, height, error);
-        return BAD_VALUE;
-    }
-    error = descriptor->setFormat(static_cast<android_pixel_format_t>(format));
-    if (error != GRALLOC1_ERROR_NONE) {
-        ALOGE("Failed to set format to %d: %d", format, error);
-        return BAD_VALUE;
-    }
-    error = descriptor->setProducerUsage(
-            static_cast<gralloc1_producer_usage_t>(usage));
-    if (error != GRALLOC1_ERROR_NONE) {
-        ALOGE("Failed to set producer usage to %u: %d", usage, error);
-        return BAD_VALUE;
-    }
-    error = descriptor->setConsumerUsage(
-            static_cast<gralloc1_consumer_usage_t>(usage));
-    if (error != GRALLOC1_ERROR_NONE) {
-        ALOGE("Failed to set consumer usage to %u: %d", usage, error);
-        return BAD_VALUE;
-    }
+    gralloc1_error_t error;
+    if (mAllocator->valid()) {
+        HalBuffer buffer(mAllocator.get(), width, height, format, usage);
+        if (!buffer.exportHandle(mMapper, handle, stride)) {
+            return NO_MEMORY;
+        }
+        error = GRALLOC1_ERROR_NONE;
+    } else {
+        auto descriptor = mDevice->createDescriptor();
+        error = descriptor->setDimensions(width, height);
+        if (error != GRALLOC1_ERROR_NONE) {
+            ALOGE("Failed to set dimensions to (%u, %u): %d",
+                    width, height, error);
+            return BAD_VALUE;
+        }
+        error = descriptor->setFormat(
+                static_cast<android_pixel_format_t>(format));
+        if (error != GRALLOC1_ERROR_NONE) {
+            ALOGE("Failed to set format to %d: %d", format, error);
+            return BAD_VALUE;
+        }
+        error = descriptor->setProducerUsage(
+                static_cast<gralloc1_producer_usage_t>(usage));
+        if (error != GRALLOC1_ERROR_NONE) {
+            ALOGE("Failed to set producer usage to %u: %d", usage, error);
+            return BAD_VALUE;
+        }
+        error = descriptor->setConsumerUsage(
+                static_cast<gralloc1_consumer_usage_t>(usage));
+        if (error != GRALLOC1_ERROR_NONE) {
+            ALOGE("Failed to set consumer usage to %u: %d", usage, error);
+            return BAD_VALUE;
+        }
 
-    error = mDevice->allocate(descriptor, graphicBufferId, handle);
-    if (error != GRALLOC1_ERROR_NONE) {
-        ALOGE("Failed to allocate (%u x %u) format %d usage %u: %d",
-                width, height, format, usage, error);
-        return NO_MEMORY;
-    }
+        error = mDevice->allocate(descriptor, graphicBufferId, handle);
+        if (error != GRALLOC1_ERROR_NONE) {
+            ALOGE("Failed to allocate (%u x %u) format %d usage %u: %d",
+                    width, height, format, usage, error);
+            return NO_MEMORY;
+        }
 
-    error = mDevice->getStride(*handle, stride);
-    if (error != GRALLOC1_ERROR_NONE) {
-        ALOGW("Failed to get stride from buffer: %d", error);
+        error = mDevice->getStride(*handle, stride);
+        if (error != GRALLOC1_ERROR_NONE) {
+            ALOGW("Failed to get stride from buffer: %d", error);
+        }
     }
 
     if (error == NO_ERROR) {
@@ -153,7 +277,14 @@
 {
     ATRACE_CALL();
 
-    auto error = mDevice->release(handle);
+    gralloc1_error_t error;
+    if (mAllocator->valid()) {
+        error = static_cast<gralloc1_error_t>(
+                mMapper.unregisterBuffer(handle));
+    } else {
+        error = mDevice->release(handle);
+    }
+
     if (error != GRALLOC1_ERROR_NONE) {
         ALOGE("Failed to free buffer: %d", error);
     }
diff --git a/libs/ui/GraphicBufferMapper.cpp b/libs/ui/GraphicBufferMapper.cpp
index 481d43c..fb55bf1 100644
--- a/libs/ui/GraphicBufferMapper.cpp
+++ b/libs/ui/GraphicBufferMapper.cpp
@@ -33,6 +33,7 @@
 #include <utils/Trace.h>
 
 #include <ui/Gralloc1On0Adapter.h>
+#include <ui/GrallocMapper.h>
 #include <ui/GraphicBufferMapper.h>
 #include <ui/Rect.h>
 
@@ -44,8 +45,13 @@
 ANDROID_SINGLETON_STATIC_INSTANCE( GraphicBufferMapper )
 
 GraphicBufferMapper::GraphicBufferMapper()
-  : mLoader(std::make_unique<Gralloc1::Loader>()),
-    mDevice(mLoader->getDevice()) {}
+  : mMapper(std::make_unique<const Gralloc2::Mapper>())
+{
+    if (!mMapper->valid()) {
+        mLoader = std::make_unique<Gralloc1::Loader>();
+        mDevice = mLoader->getDevice();
+    }
+}
 
 
 
@@ -53,7 +59,13 @@
 {
     ATRACE_CALL();
 
-    gralloc1_error_t error = mDevice->retain(handle);
+    gralloc1_error_t error;
+    if (mMapper->valid()) {
+        error = static_cast<gralloc1_error_t>(mMapper->retain(handle));
+    } else {
+        error = mDevice->retain(handle);
+    }
+
     ALOGW_IF(error != GRALLOC1_ERROR_NONE, "registerBuffer(%p) failed: %d",
             handle, error);
 
@@ -64,7 +76,14 @@
 {
     ATRACE_CALL();
 
-    gralloc1_error_t error = mDevice->retain(buffer);
+    gralloc1_error_t error;
+    if (mMapper->valid()) {
+        error = static_cast<gralloc1_error_t>(
+                mMapper->retain(buffer->getNativeBuffer()->handle));
+    } else {
+        error = mDevice->retain(buffer);
+    }
+
     ALOGW_IF(error != GRALLOC1_ERROR_NONE, "registerBuffer(%p) failed: %d",
             buffer->getNativeBuffer()->handle, error);
 
@@ -75,7 +94,14 @@
 {
     ATRACE_CALL();
 
-    gralloc1_error_t error = mDevice->release(handle);
+    gralloc1_error_t error;
+    if (mMapper->valid()) {
+        mMapper->release(handle);
+        error = GRALLOC1_ERROR_NONE;
+    } else {
+        error = mDevice->release(handle);
+    }
+
     ALOGW_IF(error != GRALLOC1_ERROR_NONE, "unregisterBuffer(%p): failed %d",
             handle, error);
 
@@ -120,11 +146,20 @@
     ATRACE_CALL();
 
     gralloc1_rect_t accessRegion = asGralloc1Rect(bounds);
-    sp<Fence> fence = new Fence(fenceFd);
-    gralloc1_error_t error = mDevice->lock(handle,
-            static_cast<gralloc1_producer_usage_t>(usage),
-            static_cast<gralloc1_consumer_usage_t>(usage),
-            &accessRegion, vaddr, fence);
+    gralloc1_error_t error;
+    if (mMapper->valid()) {
+        const Gralloc2::Device::Rect& accessRect =
+            *reinterpret_cast<Gralloc2::Device::Rect*>(&accessRegion);
+        error = static_cast<gralloc1_error_t>(mMapper->lock(
+                    handle, usage, usage, accessRect, fenceFd, *vaddr));
+    } else {
+        sp<Fence> fence = new Fence(fenceFd);
+        error = mDevice->lock(handle,
+                static_cast<gralloc1_producer_usage_t>(usage),
+                static_cast<gralloc1_consumer_usage_t>(usage),
+                &accessRegion, vaddr, fence);
+    }
+
     ALOGW_IF(error != GRALLOC1_ERROR_NONE, "lock(%p, ...) failed: %d", handle,
             error);
 
@@ -160,20 +195,29 @@
     ATRACE_CALL();
 
     gralloc1_rect_t accessRegion = asGralloc1Rect(bounds);
-    sp<Fence> fence = new Fence(fenceFd);
 
-    if (mDevice->hasCapability(GRALLOC1_CAPABILITY_ON_ADAPTER)) {
-        gralloc1_error_t error = mDevice->lockYCbCr(handle,
-                static_cast<gralloc1_producer_usage_t>(usage),
-                static_cast<gralloc1_consumer_usage_t>(usage),
-                &accessRegion, ycbcr, fence);
-        ALOGW_IF(error != GRALLOC1_ERROR_NONE, "lockYCbCr(%p, ...) failed: %d",
-                handle, error);
-        return error;
+    if (!mMapper->valid()) {
+        if (mDevice->hasCapability(GRALLOC1_CAPABILITY_ON_ADAPTER)) {
+            sp<Fence> fence = new Fence(fenceFd);
+            gralloc1_error_t error = mDevice->lockYCbCr(handle,
+                    static_cast<gralloc1_producer_usage_t>(usage),
+                    static_cast<gralloc1_consumer_usage_t>(usage),
+                    &accessRegion, ycbcr, fence);
+            ALOGW_IF(error != GRALLOC1_ERROR_NONE,
+                    "lockYCbCr(%p, ...) failed: %d", handle, error);
+            return error;
+        }
     }
 
     uint32_t numPlanes = 0;
-    gralloc1_error_t error = mDevice->getNumFlexPlanes(handle, &numPlanes);
+    gralloc1_error_t error;
+    if (mMapper->valid()) {
+        error = static_cast<gralloc1_error_t>(
+                mMapper->getNumFlexPlanes(handle, numPlanes));
+    } else {
+        error = mDevice->getNumFlexPlanes(handle, &numPlanes);
+    }
+
     if (error != GRALLOC1_ERROR_NONE) {
         ALOGV("Failed to retrieve number of flex planes: %d", error);
         return error;
@@ -188,10 +232,21 @@
     flexLayout.num_planes = numPlanes;
     flexLayout.planes = planes.data();
 
-    error = mDevice->lockFlex(handle,
-            static_cast<gralloc1_producer_usage_t>(usage),
-            static_cast<gralloc1_consumer_usage_t>(usage),
-            &accessRegion, &flexLayout, fence);
+    if (mMapper->valid()) {
+        const Gralloc2::Device::Rect& accessRect =
+            *reinterpret_cast<Gralloc2::Device::Rect*>(&accessRegion);
+        Gralloc2::FlexLayout& layout =
+            *reinterpret_cast<Gralloc2::FlexLayout*>(&flexLayout);
+        error = static_cast<gralloc1_error_t>(mMapper->lock(
+                    handle, usage, usage, accessRect, fenceFd, layout));
+    } else {
+        sp<Fence> fence = new Fence(fenceFd);
+        error = mDevice->lockFlex(handle,
+                static_cast<gralloc1_producer_usage_t>(usage),
+                static_cast<gralloc1_consumer_usage_t>(usage),
+                &accessRegion, &flexLayout, fence);
+    }
+
     if (error != GRALLOC1_ERROR_NONE) {
         ALOGW("lockFlex(%p, ...) failed: %d", handle, error);
         return error;
@@ -276,14 +331,20 @@
 {
     ATRACE_CALL();
 
-    sp<Fence> fence = Fence::NO_FENCE;
-    gralloc1_error_t error = mDevice->unlock(handle, &fence);
-    if (error != GRALLOC1_ERROR_NONE) {
-        ALOGE("unlock(%p) failed: %d", handle, error);
-        return error;
-    }
+    gralloc1_error_t error;
+    if (mMapper->valid()) {
+        *fenceFd = mMapper->unlock(handle);
+        error = GRALLOC1_ERROR_NONE;
+    } else {
+        sp<Fence> fence = Fence::NO_FENCE;
+        error = mDevice->unlock(handle, &fence);
+        if (error != GRALLOC1_ERROR_NONE) {
+            ALOGE("unlock(%p) failed: %d", handle, error);
+            return error;
+        }
 
-    *fenceFd = fence->dup();
+        *fenceFd = fence->dup();
+    }
     return error;
 }
 
diff --git a/opengl/libs/EGL/eglApi.cpp b/opengl/libs/EGL/eglApi.cpp
index 5e72794..3f2861f 100644
--- a/opengl/libs/EGL/eglApi.cpp
+++ b/opengl/libs/EGL/eglApi.cpp
@@ -1139,6 +1139,16 @@
 {
     clearError();
 
+    // Generate an error quietly when client extensions (as defined by
+    // EGL_EXT_client_extensions) are queried.  We do not want to rely on
+    // validate_display to generate the error as validate_display would log
+    // the error, which can be misleading.
+    //
+    // If we want to support EGL_EXT_client_extensions later, we can return
+    // the client extension string here instead.
+    if (dpy == EGL_NO_DISPLAY && name == EGL_EXTENSIONS)
+        return setErrorQuiet(EGL_BAD_DISPLAY, nullptr);
+
     const egl_display_ptr dp = validate_display(dpy);
     if (!dp) return (const char *) NULL;
 
diff --git a/services/sensorservice/Android.mk b/services/sensorservice/Android.mk
index 7b10319..d6e6187 100644
--- a/services/sensorservice/Android.mk
+++ b/services/sensorservice/Android.mk
@@ -10,7 +10,6 @@
     OrientationSensor.cpp \
     RecentEventLogger.cpp \
     RotationVectorSensor.cpp \
-    SensorDevice.cpp \
     SensorEventConnection.cpp \
     SensorFusion.cpp \
     SensorInterface.cpp \
@@ -19,13 +18,19 @@
     SensorService.cpp \
     SensorServiceUtils.cpp \
 
-
 LOCAL_CFLAGS:= -DLOG_TAG=\"SensorService\"
 
 LOCAL_CFLAGS += -Wall -Werror -Wextra
 
 LOCAL_CFLAGS += -fvisibility=hidden
 
+ifeq ($(ENABLE_TREBLE), true)
+LOCAL_SRC_FILES += SensorDeviceTreble.cpp
+LOCAL_CFLAGS += -DENABLE_TREBLE=1
+else
+LOCAL_SRC_FILES += SensorDevice.cpp
+endif
+
 LOCAL_SHARED_LIBRARIES := \
     libcutils \
     libhardware \
@@ -35,7 +40,20 @@
     libbinder \
     libui \
     libgui \
-    libcrypto
+    libcrypto \
+
+ifeq ($(ENABLE_TREBLE), true)
+
+LOCAL_SHARED_LIBRARIES += \
+    libbase \
+    libhidl \
+    libhwbinder \
+    android.hardware.sensors@1.0
+
+LOCAL_STATIC_LIBRARIES := \
+    android.hardware.sensors@1.0-convert
+
+endif  # ENABLE_TREBLE
 
 LOCAL_MODULE:= libsensorservice
 
diff --git a/services/sensorservice/SensorDevice.cpp b/services/sensorservice/SensorDevice.cpp
index ac03742..0245b26 100644
--- a/services/sensorservice/SensorDevice.cpp
+++ b/services/sensorservice/SensorDevice.cpp
@@ -53,13 +53,15 @@
                 SENSORS_HARDWARE_MODULE_ID, strerror(-err));
 
         if (mSensorDevice) {
-            if (mSensorDevice->common.version == SENSORS_DEVICE_API_VERSION_1_1 ||
-                mSensorDevice->common.version == SENSORS_DEVICE_API_VERSION_1_2) {
-                ALOGE(">>>> WARNING <<< Upgrade sensor HAL to version 1_3");
-            }
 
             sensor_t const* list;
             ssize_t count = mSensorModule->get_sensors_list(mSensorModule, &list);
+
+            if (mSensorDevice->common.version < SENSORS_DEVICE_API_VERSION_1_3) {
+                ALOGE(">>>> WARNING <<< Upgrade sensor HAL to version 1_3, ignoring sensors reported by this device");
+                count = 0;
+            }
+
             mActivationCount.setCapacity(count);
             Info model;
             for (size_t i=0 ; i<size_t(count) ; i++) {
@@ -164,6 +166,8 @@
         ALOGD_IF(DEBUG_CONNECTIONS, "enable index=%zd", info.batchParams.indexOfKey(ident));
 
         if (isClientDisabledLocked(ident)) {
+            ALOGE("SensorDevice::activate, isClientDisabledLocked(%p):true, handle:%d",
+                    ident, handle);
             return INVALID_OPERATION;
         }
 
@@ -347,6 +351,7 @@
 void SensorDevice::enableAllSensors() {
     Mutex::Autolock _l(mLock);
     mDisabledClients.clear();
+    ALOGI("cleared mDisabledClients");
     const int halVersion = getHalDeviceVersion();
     for (size_t i = 0; i< mActivationCount.size(); ++i) {
         Info& info = mActivationCount.editValueAt(i);
@@ -395,6 +400,7 @@
            // clients list.
            for (size_t j = 0; j < info.batchParams.size(); ++j) {
                mDisabledClients.add(info.batchParams.keyAt(j));
+               ALOGI("added %p to mDisabledClients", info.batchParams.keyAt(j));
            }
         }
     }
diff --git a/services/sensorservice/SensorDevice.h b/services/sensorservice/SensorDevice.h
index d340da3..0bb0752 100644
--- a/services/sensorservice/SensorDevice.h
+++ b/services/sensorservice/SensorDevice.h
@@ -27,19 +27,29 @@
 #include <stdint.h>
 #include <sys/types.h>
 
+#ifdef ENABLE_TREBLE
+#include <map>
+
+#include "android/hardware/sensors/1.0/ISensors.h"
+#endif
+
 // ---------------------------------------------------------------------------
 
 namespace android {
+
 // ---------------------------------------------------------------------------
 using SensorServiceUtil::Dumpable;
 
 class SensorDevice : public Singleton<SensorDevice>, public Dumpable {
 public:
     ssize_t getSensorList(sensor_t const** list);
+
     void handleDynamicSensorConnection(int handle, bool connected);
     status_t initCheck() const;
     int getHalDeviceVersion() const;
+
     ssize_t poll(sensors_event_t* buffer, size_t count);
+
     status_t activate(void* ident, int handle, int enabled);
     status_t batch(void* ident, int handle, int flags, int64_t samplingPeriodNs,
                    int64_t maxBatchReportLatencyNs);
@@ -50,6 +60,7 @@
     void disableAllSensors();
     void enableAllSensors();
     void autoDisable(void *ident, int handle);
+
     status_t injectSensorData(const sensors_event_t *event);
     void notifyConnectionDestroyed(void *ident);
 
@@ -57,8 +68,15 @@
     virtual std::string dump() const;
 private:
     friend class Singleton<SensorDevice>;
+#ifdef ENABLE_TREBLE
+    sp<android::hardware::sensors::V1_0::ISensors> mSensors;
+    Vector<sensor_t> mSensorList;
+    std::map<int32_t, sensor_t*> mConnectedDynamicSensors;
+#else
     sensors_poll_device_1_t* mSensorDevice;
     struct sensors_module_t* mSensorModule;
+#endif
+
     static const nsecs_t MINIMUM_EVENTS_PERIOD =   1000000; // 1000 Hz
     mutable Mutex mLock; // protect mActivationCount[].batchParams
     // fixed-size array after construction
@@ -111,6 +129,18 @@
 
     bool isClientDisabled(void* ident);
     bool isClientDisabledLocked(void* ident);
+
+#ifdef ENABLE_TREBLE
+    using Event = hardware::sensors::V1_0::Event;
+    using SensorInfo = hardware::sensors::V1_0::SensorInfo;
+
+    void convertToSensorEvent(const Event &src, sensors_event_t *dst);
+
+    void convertToSensorEvents(
+            const hardware::hidl_vec<Event> &src,
+            const hardware::hidl_vec<SensorInfo> &dynamicSensorsAdded,
+            sensors_event_t *dst);
+#endif  // ENABLE_TREBLE
 };
 
 // ---------------------------------------------------------------------------
diff --git a/services/sensorservice/SensorDeviceTreble.cpp b/services/sensorservice/SensorDeviceTreble.cpp
new file mode 100644
index 0000000..22b1105
--- /dev/null
+++ b/services/sensorservice/SensorDeviceTreble.cpp
@@ -0,0 +1,610 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <inttypes.h>
+#include <math.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <android-base/logging.h>
+#include <hidl/IServiceManager.h>
+#include <utils/Atomic.h>
+#include <utils/Errors.h>
+#include <utils/Singleton.h>
+
+#include "SensorDevice.h"
+#include "SensorService.h"
+
+#include "convert.h"
+
+using android::hardware::sensors::V1_0::ISensors;
+using android::hardware::hidl_vec;
+
+using Event = android::hardware::sensors::V1_0::Event;
+using SensorInfo = android::hardware::sensors::V1_0::SensorInfo;
+using SensorType = android::hardware::sensors::V1_0::SensorType;
+using DynamicSensorInfo = android::hardware::sensors::V1_0::DynamicSensorInfo;
+using SensorInfo = android::hardware::sensors::V1_0::SensorInfo;
+using Result = android::hardware::sensors::V1_0::Result;
+
+using namespace android::hardware::sensors::V1_0::implementation;
+
+namespace android {
+// ---------------------------------------------------------------------------
+
+ANDROID_SINGLETON_STATIC_INSTANCE(SensorDevice)
+
+static status_t StatusFromResult(Result result) {
+    switch (result) {
+        case Result::OK:
+            return OK;
+        case Result::BAD_VALUE:
+            return BAD_VALUE;
+        case Result::PERMISSION_DENIED:
+            return PERMISSION_DENIED;
+        case Result::INVALID_OPERATION:
+            return INVALID_OPERATION;
+    }
+}
+
+SensorDevice::SensorDevice() {
+    mSensors = ISensors::getService("sensors");
+
+    if (mSensors == NULL) {
+        return;
+    }
+
+    mSensors->getSensorsList(
+            [&](const auto &list) {
+                const size_t count = list.size();
+
+                mActivationCount.setCapacity(count);
+                Info model;
+                for (size_t i=0 ; i < count; i++) {
+                    sensor_t sensor;
+                    convertToSensor(list[i], &sensor);
+                    mSensorList.push_back(sensor);
+
+                    mActivationCount.add(list[i].sensorHandle, model);
+
+                    /* auto result = */mSensors->activate(
+                        list[i].sensorHandle, 0 /* enabled */);
+                }
+            });
+}
+
+void SensorDevice::handleDynamicSensorConnection(int handle, bool connected) {
+    if (connected) {
+        Info model;
+        mActivationCount.add(handle, model);
+        /* auto result = */mSensors->activate(handle, 0 /* enabled */);
+    } else {
+        mActivationCount.removeItem(handle);
+    }
+}
+
+std::string SensorDevice::dump() const {
+    if (mSensors == NULL) return "HAL not initialized\n";
+
+#if 0
+    result.appendFormat("HAL: %s (%s), version %#010x\n",
+                        mSensorModule->common.name,
+                        mSensorModule->common.author,
+                        getHalDeviceVersion());
+#endif
+
+    String8 result;
+    mSensors->getSensorsList([&](const auto &list) {
+            const size_t count = list.size();
+
+            result.appendFormat(
+                "Total %zu h/w sensors, %zu running:\n",
+                count,
+                mActivationCount.size());
+
+            Mutex::Autolock _l(mLock);
+            for (size_t i = 0 ; i < count ; i++) {
+                const Info& info = mActivationCount.valueFor(
+                    list[i].sensorHandle);
+
+                if (info.batchParams.isEmpty()) continue;
+                result.appendFormat(
+                    "0x%08x) active-count = %zu; ",
+                    list[i].sensorHandle,
+                    info.batchParams.size());
+
+                result.append("sampling_period(ms) = {");
+                for (size_t j = 0; j < info.batchParams.size(); j++) {
+                    const BatchParams& params = info.batchParams.valueAt(j);
+                    result.appendFormat(
+                        "%.1f%s",
+                        params.batchDelay / 1e6f,
+                        j < info.batchParams.size() - 1 ? ", " : "");
+                }
+                result.appendFormat(
+                        "}, selected = %.1f ms; ",
+                        info.bestBatchParams.batchDelay / 1e6f);
+
+                result.append("batching_period(ms) = {");
+                for (size_t j = 0; j < info.batchParams.size(); j++) {
+                    BatchParams params = info.batchParams.valueAt(j);
+
+                    result.appendFormat(
+                            "%.1f%s",
+                            params.batchTimeout / 1e6f,
+                            j < info.batchParams.size() - 1 ? ", " : "");
+                }
+
+                result.appendFormat(
+                        "}, selected = %.1f ms\n",
+                        info.bestBatchParams.batchTimeout / 1e6f);
+            }
+        });
+
+    return result.string();
+}
+
+ssize_t SensorDevice::getSensorList(sensor_t const** list) {
+    *list = &mSensorList[0];
+
+    return mSensorList.size();
+}
+
+status_t SensorDevice::initCheck() const {
+    return mSensors != NULL ? NO_ERROR : NO_INIT;
+}
+
+ssize_t SensorDevice::poll(sensors_event_t* buffer, size_t count) {
+    if (mSensors == NULL) return NO_INIT;
+
+    ssize_t err;
+
+    mSensors->poll(
+            count,
+            [&](auto result,
+                const auto &events,
+                const auto &dynamicSensorsAdded) {
+                if (result == Result::OK) {
+                    convertToSensorEvents(events, dynamicSensorsAdded, buffer);
+                    err = (ssize_t)events.size();
+                } else {
+                    err = StatusFromResult(result);
+                }
+            });
+
+    return err;
+}
+
+void SensorDevice::autoDisable(void *ident, int handle) {
+    Info& info( mActivationCount.editValueFor(handle) );
+    Mutex::Autolock _l(mLock);
+    info.removeBatchParamsForIdent(ident);
+}
+
+status_t SensorDevice::activate(void* ident, int handle, int enabled) {
+    if (mSensors == NULL) return NO_INIT;
+
+    status_t err(NO_ERROR);
+    bool actuateHardware = false;
+
+    Mutex::Autolock _l(mLock);
+    Info& info( mActivationCount.editValueFor(handle) );
+
+    ALOGD_IF(DEBUG_CONNECTIONS,
+             "SensorDevice::activate: ident=%p, handle=0x%08x, enabled=%d, count=%zu",
+             ident, handle, enabled, info.batchParams.size());
+
+    if (enabled) {
+        ALOGD_IF(DEBUG_CONNECTIONS, "enable index=%zd", info.batchParams.indexOfKey(ident));
+
+        if (isClientDisabledLocked(ident)) {
+            ALOGE("SensorDevice::activate, isClientDisabledLocked(%p):true, handle:%d",
+                    ident, handle);
+            return INVALID_OPERATION;
+        }
+
+        if (info.batchParams.indexOfKey(ident) >= 0) {
+          if (info.numActiveClients() == 1) {
+              // This is the first connection, we need to activate the underlying h/w sensor.
+              actuateHardware = true;
+          }
+        } else {
+            // Log error. Every activate call should be preceded by a batch() call.
+            ALOGE("\t >>>ERROR: activate called without batch");
+        }
+    } else {
+        ALOGD_IF(DEBUG_CONNECTIONS, "disable index=%zd", info.batchParams.indexOfKey(ident));
+
+        // If a connected dynamic sensor is deactivated, remove it from the
+        // dictionary.
+        auto it = mConnectedDynamicSensors.find(handle);
+        if (it != mConnectedDynamicSensors.end()) {
+            delete it->second;
+            mConnectedDynamicSensors.erase(it);
+        }
+
+        if (info.removeBatchParamsForIdent(ident) >= 0) {
+            if (info.numActiveClients() == 0) {
+                // This is the last connection, we need to de-activate the underlying h/w sensor.
+                actuateHardware = true;
+            } else {
+                const int halVersion = getHalDeviceVersion();
+                if (halVersion >= SENSORS_DEVICE_API_VERSION_1_1) {
+                    // Call batch for this sensor with the previously calculated best effort
+                    // batch_rate and timeout. One of the apps has unregistered for sensor
+                    // events, and the best effort batch parameters might have changed.
+                    ALOGD_IF(DEBUG_CONNECTIONS,
+                             "\t>>> actuating h/w batch %d %d %" PRId64 " %" PRId64, handle,
+                             info.bestBatchParams.flags, info.bestBatchParams.batchDelay,
+                             info.bestBatchParams.batchTimeout);
+                    /* auto result = */mSensors->batch(
+                            handle,
+                            info.bestBatchParams.flags,
+                            info.bestBatchParams.batchDelay,
+                            info.bestBatchParams.batchTimeout);
+                }
+            }
+        } else {
+            // sensor wasn't enabled for this ident
+        }
+
+        if (isClientDisabledLocked(ident)) {
+            return NO_ERROR;
+        }
+    }
+
+    if (actuateHardware) {
+        ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w activate handle=%d enabled=%d", handle,
+                 enabled);
+        err = StatusFromResult(mSensors->activate(handle, enabled));
+        ALOGE_IF(err, "Error %s sensor %d (%s)", enabled ? "activating" : "disabling", handle,
+                 strerror(-err));
+
+        if (err != NO_ERROR && enabled) {
+            // Failure when enabling the sensor. Clean up on failure.
+            info.removeBatchParamsForIdent(ident);
+        }
+    }
+
+    // On older devices which do not support batch, call setDelay().
+    if (getHalDeviceVersion() < SENSORS_DEVICE_API_VERSION_1_1 && info.numActiveClients() > 0) {
+        ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w setDelay %d %" PRId64, handle,
+                 info.bestBatchParams.batchDelay);
+        /* auto result = */mSensors->setDelay(
+                handle, info.bestBatchParams.batchDelay);
+    }
+    return err;
+}
+
+status_t SensorDevice::batch(
+        void* ident,
+        int handle,
+        int flags,
+        int64_t samplingPeriodNs,
+        int64_t maxBatchReportLatencyNs) {
+    if (mSensors == NULL) return NO_INIT;
+
+    if (samplingPeriodNs < MINIMUM_EVENTS_PERIOD) {
+        samplingPeriodNs = MINIMUM_EVENTS_PERIOD;
+    }
+
+    const int halVersion = getHalDeviceVersion();
+    if (halVersion < SENSORS_DEVICE_API_VERSION_1_1 && maxBatchReportLatencyNs != 0) {
+        // Batch is not supported on older devices return invalid operation.
+        return INVALID_OPERATION;
+    }
+
+    ALOGD_IF(DEBUG_CONNECTIONS,
+             "SensorDevice::batch: ident=%p, handle=0x%08x, flags=%d, period_ns=%" PRId64 " timeout=%" PRId64,
+             ident, handle, flags, samplingPeriodNs, maxBatchReportLatencyNs);
+
+    Mutex::Autolock _l(mLock);
+    Info& info(mActivationCount.editValueFor(handle));
+
+    if (info.batchParams.indexOfKey(ident) < 0) {
+        BatchParams params(flags, samplingPeriodNs, maxBatchReportLatencyNs);
+        info.batchParams.add(ident, params);
+    } else {
+        // A batch has already been called with this ident. Update the batch parameters.
+        info.setBatchParamsForIdent(ident, flags, samplingPeriodNs, maxBatchReportLatencyNs);
+    }
+
+    BatchParams prevBestBatchParams = info.bestBatchParams;
+    // Find the minimum of all timeouts and batch_rates for this sensor.
+    info.selectBatchParams();
+
+    ALOGD_IF(DEBUG_CONNECTIONS,
+             "\t>>> curr_period=%" PRId64 " min_period=%" PRId64
+             " curr_timeout=%" PRId64 " min_timeout=%" PRId64,
+             prevBestBatchParams.batchDelay, info.bestBatchParams.batchDelay,
+             prevBestBatchParams.batchTimeout, info.bestBatchParams.batchTimeout);
+
+    status_t err(NO_ERROR);
+    // If the min period or min timeout has changed since the last batch call, call batch.
+    if (prevBestBatchParams != info.bestBatchParams) {
+        if (halVersion >= SENSORS_DEVICE_API_VERSION_1_1) {
+            ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w BATCH %d %d %" PRId64 " %" PRId64, handle,
+                     info.bestBatchParams.flags, info.bestBatchParams.batchDelay,
+                     info.bestBatchParams.batchTimeout);
+            err = StatusFromResult(
+                    mSensors->batch(
+                        handle,
+                        info.bestBatchParams.flags,
+                        info.bestBatchParams.batchDelay,
+                        info.bestBatchParams.batchTimeout));
+        } else {
+            // For older devices which do not support batch, call setDelay() after activate() is
+            // called. Some older devices may not support calling setDelay before activate(), so
+            // call setDelay in SensorDevice::activate() method.
+        }
+        if (err != NO_ERROR) {
+            ALOGE("sensor batch failed %p %d %d %" PRId64 " %" PRId64 " err=%s",
+                  mSensors.get(), handle,
+                  info.bestBatchParams.flags, info.bestBatchParams.batchDelay,
+                  info.bestBatchParams.batchTimeout, strerror(-err));
+            info.removeBatchParamsForIdent(ident);
+        }
+    }
+    return err;
+}
+
+status_t SensorDevice::setDelay(void* ident, int handle, int64_t samplingPeriodNs) {
+    if (mSensors == NULL) return NO_INIT;
+    if (samplingPeriodNs < MINIMUM_EVENTS_PERIOD) {
+        samplingPeriodNs = MINIMUM_EVENTS_PERIOD;
+    }
+    Mutex::Autolock _l(mLock);
+    if (isClientDisabledLocked(ident)) return INVALID_OPERATION;
+    Info& info( mActivationCount.editValueFor(handle) );
+    // If the underlying sensor is NOT in continuous mode, setDelay() should return an error.
+    // Calling setDelay() in batch mode is an invalid operation.
+    if (info.bestBatchParams.batchTimeout != 0) {
+      return INVALID_OPERATION;
+    }
+    ssize_t index = info.batchParams.indexOfKey(ident);
+    if (index < 0) {
+        return BAD_INDEX;
+    }
+    BatchParams& params = info.batchParams.editValueAt(index);
+    params.batchDelay = samplingPeriodNs;
+    info.selectBatchParams();
+
+    return StatusFromResult(
+            mSensors->setDelay(handle, info.bestBatchParams.batchDelay));
+}
+
+int SensorDevice::getHalDeviceVersion() const {
+    if (mSensors == NULL) return -1;
+    return SENSORS_DEVICE_API_VERSION_1_4;
+}
+
+status_t SensorDevice::flush(void* ident, int handle) {
+    if (getHalDeviceVersion() < SENSORS_DEVICE_API_VERSION_1_1) {
+        return INVALID_OPERATION;
+    }
+    if (isClientDisabled(ident)) return INVALID_OPERATION;
+    ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w flush %d", handle);
+    return StatusFromResult(mSensors->flush(handle));
+}
+
+bool SensorDevice::isClientDisabled(void* ident) {
+    Mutex::Autolock _l(mLock);
+    return isClientDisabledLocked(ident);
+}
+
+bool SensorDevice::isClientDisabledLocked(void* ident) {
+    return mDisabledClients.indexOf(ident) >= 0;
+}
+
+void SensorDevice::enableAllSensors() {
+    Mutex::Autolock _l(mLock);
+    mDisabledClients.clear();
+    ALOGI("cleared mDisabledClients");
+    const int halVersion = getHalDeviceVersion();
+    for (size_t i = 0; i< mActivationCount.size(); ++i) {
+        Info& info = mActivationCount.editValueAt(i);
+        if (info.batchParams.isEmpty()) continue;
+        info.selectBatchParams();
+        const int sensor_handle = mActivationCount.keyAt(i);
+        ALOGD_IF(DEBUG_CONNECTIONS, "\t>> reenable actuating h/w sensor enable handle=%d ",
+                   sensor_handle);
+        status_t err(NO_ERROR);
+        if (halVersion > SENSORS_DEVICE_API_VERSION_1_0) {
+            err = StatusFromResult(
+                    mSensors->batch(
+                        sensor_handle,
+                        info.bestBatchParams.flags,
+                        info.bestBatchParams.batchDelay,
+                        info.bestBatchParams.batchTimeout));
+            ALOGE_IF(err, "Error calling batch on sensor %d (%s)", sensor_handle, strerror(-err));
+        }
+
+        if (err == NO_ERROR) {
+            err = StatusFromResult(
+                    mSensors->activate(sensor_handle, 1 /* enabled */));
+            ALOGE_IF(err, "Error activating sensor %d (%s)", sensor_handle, strerror(-err));
+        }
+
+        if (halVersion <= SENSORS_DEVICE_API_VERSION_1_0) {
+             err = StatusFromResult(
+                     mSensors->setDelay(
+                         sensor_handle, info.bestBatchParams.batchDelay));
+             ALOGE_IF(err, "Error calling setDelay sensor %d (%s)", sensor_handle, strerror(-err));
+        }
+    }
+}
+
+void SensorDevice::disableAllSensors() {
+    Mutex::Autolock _l(mLock);
+   for (size_t i = 0; i< mActivationCount.size(); ++i) {
+        const Info& info = mActivationCount.valueAt(i);
+        // Check if this sensor has been activated previously and disable it.
+        if (info.batchParams.size() > 0) {
+           const int sensor_handle = mActivationCount.keyAt(i);
+           ALOGD_IF(DEBUG_CONNECTIONS, "\t>> actuating h/w sensor disable handle=%d ",
+                   sensor_handle);
+           /* auto result = */mSensors->activate(
+                   sensor_handle, 0 /* enabled */);
+
+           // Add all the connections that were registered for this sensor to the disabled
+           // clients list.
+           for (size_t j = 0; j < info.batchParams.size(); ++j) {
+               mDisabledClients.add(info.batchParams.keyAt(j));
+               ALOGI("added %p to mDisabledClients", info.batchParams.keyAt(j));
+           }
+        }
+    }
+}
+
+status_t SensorDevice::injectSensorData(
+        const sensors_event_t *injected_sensor_event) {
+    ALOGD_IF(DEBUG_CONNECTIONS,
+            "sensor_event handle=%d ts=%" PRId64 " data=%.2f, %.2f, %.2f %.2f %.2f %.2f",
+            injected_sensor_event->sensor,
+            injected_sensor_event->timestamp, injected_sensor_event->data[0],
+            injected_sensor_event->data[1], injected_sensor_event->data[2],
+            injected_sensor_event->data[3], injected_sensor_event->data[4],
+            injected_sensor_event->data[5]);
+
+    if (getHalDeviceVersion() < SENSORS_DEVICE_API_VERSION_1_4) {
+        return INVALID_OPERATION;
+    }
+
+    Event ev;
+    convertFromSensorEvent(*injected_sensor_event, &ev);
+
+    return StatusFromResult(mSensors->injectSensorData(ev));
+}
+
+status_t SensorDevice::setMode(uint32_t mode) {
+     if (getHalDeviceVersion() < SENSORS_DEVICE_API_VERSION_1_4) {
+          return INVALID_OPERATION;
+     }
+
+     return StatusFromResult(
+             mSensors->setOperationMode(
+                 static_cast<hardware::sensors::V1_0::OperationMode>(mode)));
+}
+
+// ---------------------------------------------------------------------------
+
+int SensorDevice::Info::numActiveClients() {
+    SensorDevice& device(SensorDevice::getInstance());
+    int num = 0;
+    for (size_t i = 0; i < batchParams.size(); ++i) {
+        if (!device.isClientDisabledLocked(batchParams.keyAt(i))) {
+            ++num;
+        }
+    }
+    return num;
+}
+
+status_t SensorDevice::Info::setBatchParamsForIdent(void* ident, int flags,
+                                                    int64_t samplingPeriodNs,
+                                                    int64_t maxBatchReportLatencyNs) {
+    ssize_t index = batchParams.indexOfKey(ident);
+    if (index < 0) {
+        ALOGE("Info::setBatchParamsForIdent(ident=%p, period_ns=%" PRId64 " timeout=%" PRId64 ") failed (%s)",
+              ident, samplingPeriodNs, maxBatchReportLatencyNs, strerror(-index));
+        return BAD_INDEX;
+    }
+    BatchParams& params = batchParams.editValueAt(index);
+    params.flags = flags;
+    params.batchDelay = samplingPeriodNs;
+    params.batchTimeout = maxBatchReportLatencyNs;
+    return NO_ERROR;
+}
+
+void SensorDevice::Info::selectBatchParams() {
+    BatchParams bestParams(0, -1, -1);
+    SensorDevice& device(SensorDevice::getInstance());
+
+    for (size_t i = 0; i < batchParams.size(); ++i) {
+        if (device.isClientDisabledLocked(batchParams.keyAt(i))) continue;
+        BatchParams params = batchParams.valueAt(i);
+        if (bestParams.batchDelay == -1 || params.batchDelay < bestParams.batchDelay) {
+            bestParams.batchDelay = params.batchDelay;
+        }
+        if (bestParams.batchTimeout == -1 || params.batchTimeout < bestParams.batchTimeout) {
+            bestParams.batchTimeout = params.batchTimeout;
+        }
+    }
+    bestBatchParams = bestParams;
+}
+
+ssize_t SensorDevice::Info::removeBatchParamsForIdent(void* ident) {
+    ssize_t idx = batchParams.removeItem(ident);
+    if (idx >= 0) {
+        selectBatchParams();
+    }
+    return idx;
+}
+
+void SensorDevice::notifyConnectionDestroyed(void* ident) {
+    Mutex::Autolock _l(mLock);
+    mDisabledClients.remove(ident);
+}
+
+void SensorDevice::convertToSensorEvent(
+        const Event &src, sensors_event_t *dst) {
+    ::android::hardware::sensors::V1_0::implementation::convertToSensorEvent(
+            src, dst);
+
+    if (src.sensorType == SensorType::SENSOR_TYPE_DYNAMIC_SENSOR_META) {
+        const DynamicSensorInfo &dyn = src.u.dynamic;
+
+        dst->dynamic_sensor_meta.connected = dyn.connected;
+        dst->dynamic_sensor_meta.handle = dyn.sensorHandle;
+        if (dyn.connected) {
+            auto it = mConnectedDynamicSensors.find(dyn.sensorHandle);
+            CHECK(it != mConnectedDynamicSensors.end());
+
+            dst->dynamic_sensor_meta.sensor = it->second;
+
+            memcpy(dst->dynamic_sensor_meta.uuid,
+                   dyn.uuid.data(),
+                   sizeof(dst->dynamic_sensor_meta.uuid));
+        }
+    }
+}
+
+void SensorDevice::convertToSensorEvents(
+        const hidl_vec<Event> &src,
+        const hidl_vec<SensorInfo> &dynamicSensorsAdded,
+        sensors_event_t *dst) {
+    // Allocate a sensor_t structure for each dynamic sensor added and insert
+    // it into the dictionary of connected dynamic sensors keyed by handle.
+    for (size_t i = 0; i < dynamicSensorsAdded.size(); ++i) {
+        const SensorInfo &info = dynamicSensorsAdded[i];
+
+        auto it = mConnectedDynamicSensors.find(info.sensorHandle);
+        CHECK(it == mConnectedDynamicSensors.end());
+
+        sensor_t *sensor = new sensor_t;
+        convertToSensor(info, sensor);
+
+        mConnectedDynamicSensors.insert(
+                std::make_pair(sensor->handle, sensor));
+    }
+
+    for (size_t i = 0; i < src.size(); ++i) {
+        convertToSensorEvent(src[i], &dst[i]);
+    }
+}
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+
diff --git a/services/surfaceflinger/Android.mk b/services/surfaceflinger/Android.mk
index 170faa8..f695edb 100644
--- a/services/surfaceflinger/Android.mk
+++ b/services/surfaceflinger/Android.mk
@@ -18,7 +18,9 @@
     MessageQueue.cpp \
     MonitoredProducer.cpp \
     SurfaceFlingerConsumer.cpp \
+    SurfaceInterceptor.cpp \
     Transform.cpp \
+    DisplayHardware/ComposerHal.cpp \
     DisplayHardware/FramebufferSurface.cpp \
     DisplayHardware/HWC2.cpp \
     DisplayHardware/HWC2On1Adapter.cpp \
@@ -34,13 +36,12 @@
     RenderEngine/GLExtensions.cpp \
     RenderEngine/RenderEngine.cpp \
     RenderEngine/Texture.cpp \
-    RenderEngine/GLES10RenderEngine.cpp \
-    RenderEngine/GLES11RenderEngine.cpp \
-    RenderEngine/GLES20RenderEngine.cpp
+    RenderEngine/GLES20RenderEngine.cpp \
 
+LOCAL_MODULE := libsurfaceflinger
 LOCAL_C_INCLUDES := \
-	frameworks/native/vulkan/include \
-	external/vulkan-validation-layers/libs/vkjson
+    frameworks/native/vulkan/include \
+    external/vulkan-validation-layers/libs/vkjson \
 
 LOCAL_CFLAGS := -DLOG_TAG=\"SurfaceFlinger\"
 LOCAL_CFLAGS += -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
@@ -125,12 +126,16 @@
 
 LOCAL_CFLAGS += -fvisibility=hidden -Werror=format
 
-LOCAL_STATIC_LIBRARIES := libvkjson
+LOCAL_STATIC_LIBRARIES := libtrace_proto libvkjson
 LOCAL_SHARED_LIBRARIES := \
+    android.hardware.graphics.allocator@2.0 \
+    android.hardware.graphics.composer@2.1 \
     libcutils \
     liblog \
     libdl \
     libhardware \
+    libhidl \
+    libhwbinder \
     libutils \
     libEGL \
     libGLESv1_CM \
@@ -139,9 +144,19 @@
     libui \
     libgui \
     libpowermanager \
-    libvulkan
+    libvulkan \
+    libprotobuf-cpp-full \
+    libhidl \
+    libhwbinder \
+    libbase \
+    libutils \
+    android.hardware.power@1.0
 
-LOCAL_MODULE := libsurfaceflinger
+LOCAL_EXPORT_SHARED_LIBRARY_HEADERS := \
+    android.hardware.graphics.allocator@2.0 \
+    android.hardware.graphics.composer@2.1 \
+    libhidl \
+    libhwbinder
 
 LOCAL_CFLAGS += -Wall -Werror -Wunused -Wunreachable-code
 
@@ -179,6 +194,7 @@
     libdl
 
 LOCAL_WHOLE_STATIC_LIBRARIES := libsigchain
+LOCAL_STATIC_LIBRARIES := libtrace_proto
 
 LOCAL_MODULE := surfaceflinger
 
diff --git a/services/surfaceflinger/DispSync.cpp b/services/surfaceflinger/DispSync.cpp
index 1a9820d..836fb89 100644
--- a/services/surfaceflinger/DispSync.cpp
+++ b/services/surfaceflinger/DispSync.cpp
@@ -64,7 +64,7 @@
 class DispSyncThread: public Thread {
 public:
 
-    DispSyncThread(const char* name):
+    explicit DispSyncThread(const char* name):
             mName(name),
             mStop(false),
             mPeriod(0),
diff --git a/services/surfaceflinger/DisplayDevice.cpp b/services/surfaceflinger/DisplayDevice.cpp
index 5c2c0ad..6c18ef7 100644
--- a/services/surfaceflinger/DisplayDevice.cpp
+++ b/services/surfaceflinger/DisplayDevice.cpp
@@ -613,3 +613,17 @@
     mDisplaySurface->dumpAsString(surfaceDump);
     result.append(surfaceDump);
 }
+
+std::atomic<int32_t> DisplayDeviceState::nextDisplayId(1);
+
+DisplayDeviceState::DisplayDeviceState(DisplayDevice::DisplayType type, bool isSecure)
+    : type(type),
+      layerStack(DisplayDevice::NO_LAYER_STACK),
+      orientation(0),
+      width(0),
+      height(0),
+      isSecure(isSecure)
+{
+    viewport.makeInvalid();
+    frame.makeInvalid();
+}
diff --git a/services/surfaceflinger/DisplayDevice.h b/services/surfaceflinger/DisplayDevice.h
index 105e980..92ede08 100644
--- a/services/surfaceflinger/DisplayDevice.h
+++ b/services/surfaceflinger/DisplayDevice.h
@@ -263,6 +263,28 @@
 #endif
 };
 
+struct DisplayDeviceState {
+    DisplayDeviceState() = default;
+    DisplayDeviceState(DisplayDevice::DisplayType type, bool isSecure);
+
+    bool isValid() const { return type >= 0; }
+    bool isMainDisplay() const { return type == DisplayDevice::DISPLAY_PRIMARY; }
+    bool isVirtualDisplay() const { return type >= DisplayDevice::DISPLAY_VIRTUAL; }
+
+    static std::atomic<int32_t> nextDisplayId;
+    int32_t displayId = nextDisplayId++;
+    DisplayDevice::DisplayType type = DisplayDevice::DISPLAY_ID_INVALID;
+    sp<IGraphicBufferProducer> surface;
+    uint32_t layerStack = DisplayDevice::NO_LAYER_STACK;
+    Rect viewport;
+    Rect frame;
+    uint8_t orientation = 0;
+    uint32_t width = 0;
+    uint32_t height = 0;
+    String8 displayName;
+    bool isSecure = false;
+};
+
 }; // namespace android
 
 #endif // ANDROID_DISPLAY_DEVICE_H
diff --git a/services/surfaceflinger/DisplayHardware/ComposerHal.cpp b/services/surfaceflinger/DisplayHardware/ComposerHal.cpp
new file mode 100644
index 0000000..128e2b0
--- /dev/null
+++ b/services/surfaceflinger/DisplayHardware/ComposerHal.cpp
@@ -0,0 +1,650 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#undef LOG_TAG
+#define LOG_TAG "HwcComposer"
+
+#include <inttypes.h>
+#include <log/log.h>
+
+#include "ComposerHal.h"
+
+namespace android {
+
+using hardware::Return;
+using hardware::hidl_vec;
+
+namespace Hwc2 {
+
+namespace {
+
+class BufferHandle {
+public:
+    BufferHandle(const native_handle_t* buffer)
+    {
+        // nullptr is not a valid handle to HIDL
+        mHandle = (buffer) ? buffer : native_handle_init(mStorage, 0, 0);
+    }
+
+    operator const native_handle_t*() const
+    {
+        return mHandle;
+    }
+
+private:
+    NATIVE_HANDLE_DECLARE_STORAGE(mStorage, 0, 0);
+    const native_handle_t* mHandle;
+};
+
+class FenceHandle
+{
+public:
+    FenceHandle(int fd, bool owned)
+        : mOwned(owned)
+    {
+        if (fd >= 0) {
+            mHandle = native_handle_init(mStorage, 1, 0);
+            mHandle->data[0] = fd;
+        } else {
+            // nullptr is not a valid handle to HIDL
+            mHandle = native_handle_init(mStorage, 0, 0);
+        }
+    }
+
+    ~FenceHandle()
+    {
+        if (mOwned) {
+            native_handle_close(mHandle);
+        }
+    }
+
+    operator const native_handle_t*() const
+    {
+        return mHandle;
+    }
+
+private:
+    bool mOwned;
+    NATIVE_HANDLE_DECLARE_STORAGE(mStorage, 1, 0);
+    native_handle_t* mHandle;
+};
+
+// assume NO_RESOURCES when Status::isOk returns false
+constexpr Error kDefaultError = Error::NO_RESOURCES;
+
+template<typename T, typename U>
+T unwrapRet(Return<T>& ret, const U& default_val)
+{
+    return (ret.getStatus().isOk()) ? static_cast<T>(ret) :
+        static_cast<T>(default_val);
+}
+
+Error unwrapRet(Return<Error>& ret)
+{
+    return unwrapRet(ret, kDefaultError);
+}
+
+template<typename T>
+void assignFromHidlVec(std::vector<T>& vec, const hidl_vec<T>& data)
+{
+    vec.clear();
+    vec.insert(vec.begin(), &data[0], &data[data.size()]);
+}
+
+} // anonymous namespace
+
+Composer::Composer()
+{
+    mService = IComposer::getService("hwcomposer");
+    if (mService == nullptr) {
+        LOG_ALWAYS_FATAL("failed to get hwcomposer service");
+    }
+}
+
+std::vector<IComposer::Capability> Composer::getCapabilities() const
+{
+    std::vector<IComposer::Capability> capabilities;
+    mService->getCapabilities(
+            [&](const auto& tmpCapabilities) {
+                assignFromHidlVec(capabilities, tmpCapabilities);
+            });
+
+    return capabilities;
+}
+
+std::string Composer::dumpDebugInfo() const
+{
+    std::string info;
+    mService->dumpDebugInfo([&](const auto& tmpInfo) {
+        info = tmpInfo.c_str();
+    });
+
+    return info;
+}
+
+void Composer::registerCallback(const sp<IComposerCallback>& callback) const
+{
+    auto ret = mService->registerCallback(callback);
+    if (!ret.getStatus().isOk()) {
+        ALOGE("failed to register IComposerCallback");
+    }
+}
+
+uint32_t Composer::getMaxVirtualDisplayCount() const
+{
+    auto ret = mService->getMaxVirtualDisplayCount();
+    return unwrapRet(ret, 0);
+}
+
+Error Composer::createVirtualDisplay(uint32_t width, uint32_t height,
+            PixelFormat& format, Display& display) const
+{
+    Error error = kDefaultError;
+    mService->createVirtualDisplay(width, height, format,
+            [&](const auto& tmpError, const auto& tmpDisplay,
+                const auto& tmpFormat) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                display = tmpDisplay;
+                format = tmpFormat;
+            });
+
+    return error;
+}
+
+Error Composer::destroyVirtualDisplay(Display display) const
+{
+    auto ret = mService->destroyVirtualDisplay(display);
+    return unwrapRet(ret);
+}
+
+Error Composer::acceptDisplayChanges(Display display) const
+{
+    auto ret = mService->acceptDisplayChanges(display);
+    return unwrapRet(ret);
+}
+
+Error Composer::createLayer(Display display, Layer& layer) const
+{
+    Error error = kDefaultError;
+    mService->createLayer(display,
+            [&](const auto& tmpError, const auto& tmpLayer) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                layer = tmpLayer;
+            });
+
+    return error;
+}
+
+Error Composer::destroyLayer(Display display, Layer layer) const
+{
+    auto ret = mService->destroyLayer(display, layer);
+    return unwrapRet(ret);
+}
+
+Error Composer::getActiveConfig(Display display, Config& config) const
+{
+    Error error = kDefaultError;
+    mService->getActiveConfig(display,
+            [&](const auto& tmpError, const auto& tmpConfig) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                config = tmpConfig;
+            });
+
+    return error;
+}
+
+Error Composer::getChangedCompositionTypes(Display display,
+        std::vector<Layer>& layers,
+        std::vector<IComposer::Composition>& types) const
+{
+    Error error = kDefaultError;
+    mService->getChangedCompositionTypes(display,
+            [&](const auto& tmpError, const auto& tmpLayers,
+                const auto& tmpTypes) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                assignFromHidlVec(layers, tmpLayers);
+                assignFromHidlVec(types, tmpTypes);
+            });
+
+    return error;
+}
+
+Error Composer::getColorModes(Display display,
+        std::vector<ColorMode>& modes) const
+{
+    Error error = kDefaultError;
+    mService->getColorModes(display,
+            [&](const auto& tmpError, const auto& tmpModes) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                assignFromHidlVec(modes, tmpModes);
+            });
+
+    return error;
+}
+
+Error Composer::getDisplayAttribute(Display display, Config config,
+        IComposer::Attribute attribute, int32_t& value) const
+{
+    Error error = kDefaultError;
+    mService->getDisplayAttribute(display, config, attribute,
+            [&](const auto& tmpError, const auto& tmpValue) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                value = tmpValue;
+            });
+
+    return error;
+}
+
+Error Composer::getDisplayConfigs(Display display,
+        std::vector<Config>& configs) const
+{
+    Error error = kDefaultError;
+    mService->getDisplayConfigs(display,
+            [&](const auto& tmpError, const auto& tmpConfigs) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                assignFromHidlVec(configs, tmpConfigs);
+            });
+
+    return error;
+}
+
+Error Composer::getDisplayName(Display display, std::string& name) const
+{
+    Error error = kDefaultError;
+    mService->getDisplayName(display,
+            [&](const auto& tmpError, const auto& tmpName) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                name = tmpName.c_str();
+            });
+
+    return error;
+}
+
+Error Composer::getDisplayRequests(Display display,
+        uint32_t& displayRequestMask, std::vector<Layer>& layers,
+        std::vector<uint32_t>& layerRequestMasks) const
+{
+    Error error = kDefaultError;
+    mService->getDisplayRequests(display,
+            [&](const auto& tmpError, const auto& tmpDisplayRequestMask,
+                const auto& tmpLayers, const auto& tmpLayerRequestMasks) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                displayRequestMask = tmpDisplayRequestMask;
+                assignFromHidlVec(layers, tmpLayers);
+                assignFromHidlVec(layerRequestMasks, tmpLayerRequestMasks);
+            });
+
+    return error;
+}
+
+Error Composer::getDisplayType(Display display, IComposer::DisplayType& type) const
+{
+    Error error = kDefaultError;
+    mService->getDisplayType(display,
+            [&](const auto& tmpError, const auto& tmpType) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                type = tmpType;
+            });
+
+    return error;
+}
+
+Error Composer::getDozeSupport(Display display, bool& support) const
+{
+    Error error = kDefaultError;
+    mService->getDozeSupport(display,
+            [&](const auto& tmpError, const auto& tmpSupport) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                support = tmpSupport;
+            });
+
+    return error;
+}
+
+Error Composer::getHdrCapabilities(Display display, std::vector<Hdr>& types,
+        float& maxLuminance, float& maxAverageLuminance,
+        float& minLuminance) const
+{
+    Error error = kDefaultError;
+    mService->getHdrCapabilities(display,
+            [&](const auto& tmpError, const auto& tmpTypes,
+                const auto& tmpMaxLuminance,
+                const auto& tmpMaxAverageLuminance,
+                const auto& tmpMinLuminance) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                assignFromHidlVec(types, tmpTypes);
+                maxLuminance = tmpMaxLuminance;
+                maxAverageLuminance = tmpMaxAverageLuminance;
+                minLuminance = tmpMinLuminance;
+            });
+
+    return error;
+}
+
+Error Composer::getReleaseFences(Display display, std::vector<Layer>& layers,
+        std::vector<int>& releaseFences) const
+{
+    Error error = kDefaultError;
+    mService->getReleaseFences(display,
+            [&](const auto& tmpError, const auto& tmpLayers,
+                const auto& tmpReleaseFences) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                if (static_cast<int>(tmpLayers.size()) !=
+                        tmpReleaseFences->numFds) {
+                    ALOGE("invalid releaseFences outputs: "
+                          "layer count %zu != fence count %d",
+                          tmpLayers.size(), tmpReleaseFences->numFds);
+                    error = Error::NO_RESOURCES;
+                    return;
+                }
+
+                // dup the file descriptors
+                std::vector<int> tmpFds;
+                tmpFds.reserve(tmpReleaseFences->numFds);
+                for (int i = 0; i < tmpReleaseFences->numFds; i++) {
+                    int fd = dup(tmpReleaseFences->data[i]);
+                    if (fd < 0) {
+                        break;
+                    }
+                    tmpFds.push_back(fd);
+                }
+                if (static_cast<int>(tmpFds.size()) <
+                        tmpReleaseFences->numFds) {
+                    for (auto fd : tmpFds) {
+                        close(fd);
+                    }
+
+                    error = Error::NO_RESOURCES;
+                    return;
+                }
+
+                assignFromHidlVec(layers, tmpLayers);
+                releaseFences = std::move(tmpFds);
+            });
+
+    return error;
+}
+
+Error Composer::presentDisplay(Display display, int& presentFence) const
+{
+    Error error = kDefaultError;
+    mService->presentDisplay(display,
+            [&](const auto& tmpError, const auto& tmpPresentFence) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                if (tmpPresentFence->numFds == 1) {
+                    int fd = dup(tmpPresentFence->data[0]);
+                    if (fd >= 0) {
+                        presentFence = fd;
+                    } else {
+                        error = Error::NO_RESOURCES;
+                    }
+                } else {
+                    presentFence = -1;
+                }
+            });
+
+    return error;
+}
+
+Error Composer::setActiveConfig(Display display, Config config) const
+{
+    auto ret = mService->setActiveConfig(display, config);
+    return unwrapRet(ret);
+}
+
+Error Composer::setClientTarget(Display display, const native_handle_t* target,
+        int acquireFence, Dataspace dataspace,
+        const std::vector<IComposer::Rect>& damage) const
+{
+    BufferHandle tmpTarget(target);
+    FenceHandle tmpAcquireFence(acquireFence, true);
+
+    hidl_vec<IComposer::Rect> tmpDamage;
+    tmpDamage.setToExternal(const_cast<IComposer::Rect*>(damage.data()),
+            damage.size());
+
+    auto ret = mService->setClientTarget(display, tmpTarget,
+            tmpAcquireFence, dataspace, tmpDamage);
+    return unwrapRet(ret);
+}
+
+Error Composer::setColorMode(Display display, ColorMode mode) const
+{
+    auto ret = mService->setColorMode(display, mode);
+    return unwrapRet(ret);
+}
+
+Error Composer::setColorTransform(Display display, const float* matrix,
+        ColorTransform hint) const
+{
+    hidl_vec<float> tmpMatrix;
+    tmpMatrix.setToExternal(const_cast<float*>(matrix), 16);
+
+    auto ret = mService->setColorTransform(display, tmpMatrix, hint);
+    return unwrapRet(ret);
+}
+
+Error Composer::setOutputBuffer(Display display, const native_handle_t* buffer,
+        int releaseFence) const
+{
+    BufferHandle tmpBuffer(buffer);
+    FenceHandle tmpReleaseFence(releaseFence, false);
+
+    auto ret = mService->setOutputBuffer(display, tmpBuffer, tmpReleaseFence);
+    return unwrapRet(ret);
+}
+
+Error Composer::setPowerMode(Display display, IComposer::PowerMode mode) const
+{
+    auto ret = mService->setPowerMode(display, mode);
+    return unwrapRet(ret);
+}
+
+Error Composer::setVsyncEnabled(Display display, IComposer::Vsync enabled) const
+{
+    auto ret = mService->setVsyncEnabled(display, enabled);
+    return unwrapRet(ret);
+}
+
+Error Composer::validateDisplay(Display display, uint32_t& numTypes, uint32_t&
+        numRequests) const
+{
+    Error error = kDefaultError;
+    mService->validateDisplay(display,
+            [&](const auto& tmpError, const auto& tmpNumTypes,
+                const auto& tmpNumRequests) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                numTypes = tmpNumTypes;
+                numRequests = tmpNumRequests;
+            });
+
+    return error;
+}
+
+Error Composer::setCursorPosition(Display display, Layer layer,
+        int32_t x, int32_t y) const
+{
+    auto ret = mService->setCursorPosition(display, layer, x, y);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerBuffer(Display display, Layer layer,
+        const native_handle_t* buffer, int acquireFence) const
+{
+    BufferHandle tmpBuffer(buffer);
+    FenceHandle tmpAcquireFence(acquireFence, true);
+
+    auto ret = mService->setLayerBuffer(display, layer,
+            tmpBuffer, tmpAcquireFence);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerSurfaceDamage(Display display, Layer layer,
+        const std::vector<IComposer::Rect>& damage) const
+{
+    hidl_vec<IComposer::Rect> tmpDamage;
+    tmpDamage.setToExternal(const_cast<IComposer::Rect*>(damage.data()),
+            damage.size());
+
+    auto ret = mService->setLayerSurfaceDamage(display, layer, tmpDamage);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerBlendMode(Display display, Layer layer,
+        IComposer::BlendMode mode) const
+{
+    auto ret = mService->setLayerBlendMode(display, layer, mode);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerColor(Display display, Layer layer,
+        const IComposer::Color& color) const
+{
+    auto ret = mService->setLayerColor(display, layer, color);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerCompositionType(Display display, Layer layer,
+        IComposer::Composition type) const
+{
+    auto ret = mService->setLayerCompositionType(display, layer, type);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerDataspace(Display display, Layer layer,
+        Dataspace dataspace) const
+{
+    auto ret = mService->setLayerDataspace(display, layer, dataspace);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerDisplayFrame(Display display, Layer layer,
+        const IComposer::Rect& frame) const
+{
+    auto ret = mService->setLayerDisplayFrame(display, layer, frame);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerPlaneAlpha(Display display, Layer layer,
+        float alpha) const
+{
+    auto ret = mService->setLayerPlaneAlpha(display, layer, alpha);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerSidebandStream(Display display, Layer layer,
+        const native_handle_t* stream) const
+{
+    BufferHandle tmpStream(stream);
+
+    auto ret = mService->setLayerSidebandStream(display, layer, tmpStream);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerSourceCrop(Display display, Layer layer,
+        const IComposer::FRect& crop) const
+{
+    auto ret = mService->setLayerSourceCrop(display, layer, crop);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerTransform(Display display, Layer layer,
+        Transform transform) const
+{
+    auto ret = mService->setLayerTransform(display, layer, transform);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerVisibleRegion(Display display, Layer layer,
+        const std::vector<IComposer::Rect>& visible) const
+{
+    hidl_vec<IComposer::Rect> tmpVisible;
+    tmpVisible.setToExternal(const_cast<IComposer::Rect*>(visible.data()),
+            visible.size());
+
+    auto ret = mService->setLayerVisibleRegion(display, layer, tmpVisible);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerZOrder(Display display, Layer layer, uint32_t z) const
+{
+    auto ret = mService->setLayerZOrder(display, layer, z);
+    return unwrapRet(ret);
+}
+
+} // namespace Hwc2
+
+} // namespace android
diff --git a/services/surfaceflinger/DisplayHardware/ComposerHal.h b/services/surfaceflinger/DisplayHardware/ComposerHal.h
new file mode 100644
index 0000000..fd74a92
--- /dev/null
+++ b/services/surfaceflinger/DisplayHardware/ComposerHal.h
@@ -0,0 +1,142 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_SF_COMPOSER_HAL_H
+#define ANDROID_SF_COMPOSER_HAL_H
+
+#include <string>
+#include <vector>
+
+#include <android/hardware/graphics/composer/2.1/IComposer.h>
+#include <utils/StrongPointer.h>
+
+namespace android {
+
+namespace Hwc2 {
+
+using android::hardware::graphics::allocator::V2_0::PixelFormat;
+
+using android::hardware::graphics::composer::V2_1::IComposer;
+using android::hardware::graphics::composer::V2_1::IComposerCallback;
+using android::hardware::graphics::composer::V2_1::Error;
+using android::hardware::graphics::composer::V2_1::Display;
+using android::hardware::graphics::composer::V2_1::Layer;
+using android::hardware::graphics::composer::V2_1::Config;
+
+using android::hardware::graphics::composer::V2_1::ColorMode;
+using android::hardware::graphics::composer::V2_1::Hdr;
+using android::hardware::graphics::composer::V2_1::Dataspace;
+using android::hardware::graphics::composer::V2_1::ColorTransform;
+using android::hardware::graphics::composer::V2_1::Transform;
+
+// Composer is a wrapper to IComposer, a proxy to server-side composer.
+class Composer {
+public:
+    Composer();
+
+    std::vector<IComposer::Capability> getCapabilities() const;
+    std::string dumpDebugInfo() const;
+
+    void registerCallback(const sp<IComposerCallback>& callback) const;
+
+    uint32_t getMaxVirtualDisplayCount() const;
+    Error createVirtualDisplay(uint32_t width, uint32_t height,
+            PixelFormat& format, Display& display) const;
+    Error destroyVirtualDisplay(Display display) const;
+
+    Error acceptDisplayChanges(Display display) const;
+
+    Error createLayer(Display display, Layer& layer) const;
+    Error destroyLayer(Display display, Layer layer) const;
+
+    Error getActiveConfig(Display display, Config& config) const;
+    Error getChangedCompositionTypes(Display display,
+            std::vector<Layer>& layers,
+            std::vector<IComposer::Composition>& types) const;
+    Error getColorModes(Display display, std::vector<ColorMode>& modes) const;
+    Error getDisplayAttribute(Display display, Config config,
+            IComposer::Attribute attribute, int32_t& value) const;
+    Error getDisplayConfigs(Display display,
+            std::vector<Config>& configs) const;
+    Error getDisplayName(Display display, std::string& name) const;
+
+    Error getDisplayRequests(Display display, uint32_t& displayRequestMask,
+            std::vector<Layer>& layers,
+            std::vector<uint32_t>& layerRequestMasks) const;
+
+    Error getDisplayType(Display display, IComposer::DisplayType& type) const;
+    Error getDozeSupport(Display display, bool& support) const;
+    Error getHdrCapabilities(Display display, std::vector<Hdr>& types,
+            float& maxLuminance, float& maxAverageLuminance,
+            float& minLuminance) const;
+
+    Error getReleaseFences(Display display, std::vector<Layer>& layers,
+            std::vector<int>& releaseFences) const;
+
+    Error presentDisplay(Display display, int& presentFence) const;
+
+    Error setActiveConfig(Display display, Config config) const;
+    Error setClientTarget(Display display, const native_handle_t* target,
+            int acquireFence, Dataspace dataspace,
+            const std::vector<IComposer::Rect>& damage) const;
+    Error setColorMode(Display display, ColorMode mode) const;
+    Error setColorTransform(Display display, const float* matrix,
+            ColorTransform hint) const;
+    Error setOutputBuffer(Display display, const native_handle_t* buffer,
+            int releaseFence) const;
+    Error setPowerMode(Display display, IComposer::PowerMode mode) const;
+    Error setVsyncEnabled(Display display, IComposer::Vsync enabled) const;
+
+    Error validateDisplay(Display display, uint32_t& numTypes,
+            uint32_t& numRequests) const;
+
+    Error setCursorPosition(Display display, Layer layer,
+            int32_t x, int32_t y) const;
+    Error setLayerBuffer(Display display, Layer layer,
+            const native_handle_t* buffer, int acquireFence) const;
+    Error setLayerSurfaceDamage(Display display, Layer layer,
+            const std::vector<IComposer::Rect>& damage) const;
+    Error setLayerBlendMode(Display display, Layer layer,
+            IComposer::BlendMode mode) const;
+    Error setLayerColor(Display display, Layer layer,
+            const IComposer::Color& color) const;
+    Error setLayerCompositionType(Display display, Layer layer,
+            IComposer::Composition type) const;
+    Error setLayerDataspace(Display display, Layer layer,
+            Dataspace dataspace) const;
+    Error setLayerDisplayFrame(Display display, Layer layer,
+            const IComposer::Rect& frame) const;
+    Error setLayerPlaneAlpha(Display display, Layer layer,
+            float alpha) const;
+    Error setLayerSidebandStream(Display display, Layer layer,
+            const native_handle_t* stream) const;
+    Error setLayerSourceCrop(Display display, Layer layer,
+            const IComposer::FRect& crop) const;
+    Error setLayerTransform(Display display, Layer layer,
+            Transform transform) const;
+    Error setLayerVisibleRegion(Display display, Layer layer,
+            const std::vector<IComposer::Rect>& visible) const;
+    Error setLayerZOrder(Display display, Layer layer, uint32_t z) const;
+
+private:
+    sp<IComposer> mService;
+};
+
+} // namespace Hwc2
+
+} // namespace android
+
+#endif // ANDROID_SF_COMPOSER_HAL_H
diff --git a/services/surfaceflinger/DisplayHardware/HWC2.cpp b/services/surfaceflinger/DisplayHardware/HWC2.cpp
index 4fe3cfd..c79caf4 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWC2.cpp
@@ -21,6 +21,7 @@
 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
 
 #include "HWC2.h"
+#include "ComposerHal.h"
 
 #include "FloatRect.h"
 
@@ -79,11 +80,16 @@
 using android::Rect;
 using android::Region;
 using android::sp;
+using android::hardware::Return;
+using android::hardware::Void;
 
 namespace HWC2 {
 
+namespace Hwc2 = android::Hwc2;
+
 // Device methods
 
+#ifdef BYPASS_IHWC
 Device::Device(hwc2_device_t* device)
   : mHwcDevice(device),
     mCreateVirtualDisplay(nullptr),
@@ -128,6 +134,10 @@
     mSetLayerTransform(nullptr),
     mSetLayerVisibleRegion(nullptr),
     mSetLayerZOrder(nullptr),
+#else
+Device::Device()
+  : mComposer(std::make_unique<Hwc2::Composer>()),
+#endif // BYPASS_IHWC
     mCapabilities(),
     mDisplays(),
     mHotplug(),
@@ -144,9 +154,11 @@
 
 Device::~Device()
 {
+#ifdef BYPASS_IHWC
     if (mHwcDevice == nullptr) {
         return;
     }
+#endif
 
     for (auto element : mDisplays) {
         auto display = element.second.lock();
@@ -175,13 +187,16 @@
         }
     }
 
+#ifdef BYPASS_IHWC
     hwc2_close(mHwcDevice);
+#endif
 }
 
 // Required by HWC2 device
 
 std::string Device::dump() const
 {
+#ifdef BYPASS_IHWC
     uint32_t numBytes = 0;
     mDump(mHwcDevice, &numBytes, nullptr);
 
@@ -189,11 +204,18 @@
     mDump(mHwcDevice, &numBytes, buffer.data());
 
     return std::string(buffer.data(), buffer.size());
+#else
+    return mComposer->dumpDebugInfo();
+#endif
 }
 
 uint32_t Device::getMaxVirtualDisplayCount() const
 {
+#ifdef BYPASS_IHWC
     return mGetMaxVirtualDisplayCount(mHwcDevice);
+#else
+    return mComposer->getMaxVirtualDisplayCount();
+#endif
 }
 
 Error Device::createVirtualDisplay(uint32_t width, uint32_t height,
@@ -202,9 +224,15 @@
     ALOGI("Creating virtual display");
 
     hwc2_display_t displayId = 0;
+#ifdef BYPASS_IHWC
     int32_t intFormat = static_cast<int32_t>(*format);
     int32_t intError = mCreateVirtualDisplay(mHwcDevice, width, height,
             &intFormat, &displayId);
+#else
+    auto intFormat = static_cast<Hwc2::PixelFormat>(*format);
+    auto intError = mComposer->createVirtualDisplay(width, height,
+            intFormat, displayId);
+#endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None) {
         return error;
@@ -315,6 +343,7 @@
 {
     static_assert(sizeof(Capability) == sizeof(int32_t),
             "Capability size has changed");
+#ifdef BYPASS_IHWC
     uint32_t numCapabilities = 0;
     mHwcDevice->getCapabilities(mHwcDevice, &numCapabilities, nullptr);
     std::vector<Capability> capabilities(numCapabilities);
@@ -323,6 +352,12 @@
     for (auto capability : capabilities) {
         mCapabilities.emplace(capability);
     }
+#else
+    auto capabilities = mComposer->getCapabilities();
+    for (auto capability : capabilities) {
+        mCapabilities.emplace(static_cast<Capability>(capability));
+    }
+#endif
 }
 
 bool Device::hasCapability(HWC2::Capability capability) const
@@ -333,6 +368,7 @@
 
 void Device::loadFunctionPointers()
 {
+#ifdef BYPASS_IHWC
     // For all of these early returns, we log an error message inside
     // loadFunctionPointer specifying which function failed to load
 
@@ -426,13 +462,48 @@
             mSetLayerVisibleRegion)) return;
     if (!loadFunctionPointer(FunctionDescriptor::SetLayerZOrder,
             mSetLayerZOrder)) return;
+#endif // BYPASS_IHWC
 }
 
+namespace {
+class ComposerCallback : public Hwc2::IComposerCallback {
+public:
+    ComposerCallback(Device* device) : mDevice(device) {}
+
+    Return<void> onHotplug(Hwc2::Display display,
+            Connection connected) override
+    {
+        hotplug_hook(mDevice, display, static_cast<int32_t>(connected));
+        return Void();
+    }
+
+    Return<void> onRefresh(Hwc2::Display display) override
+    {
+        refresh_hook(mDevice, display);
+        return Void();
+    }
+
+    Return<void> onVsync(Hwc2::Display display, int64_t timestamp) override
+    {
+        vsync_hook(mDevice, display, timestamp);
+        return Void();
+    }
+
+private:
+    Device* mDevice;
+};
+} // namespace anonymous
+
 void Device::registerCallbacks()
 {
+#ifdef BYPASS_IHWC
     registerCallback<HWC2_PFN_HOTPLUG>(Callback::Hotplug, hotplug_hook);
     registerCallback<HWC2_PFN_REFRESH>(Callback::Refresh, refresh_hook);
     registerCallback<HWC2_PFN_VSYNC>(Callback::Vsync, vsync_hook);
+#else
+    sp<ComposerCallback> callback = new ComposerCallback(this);
+    mComposer->registerCallback(callback);
+#endif
 }
 
 
@@ -441,7 +512,11 @@
 void Device::destroyVirtualDisplay(hwc2_display_t display)
 {
     ALOGI("Destroying virtual display");
+#ifdef BYPASS_IHWC
     int32_t intError = mDestroyVirtualDisplay(mHwcDevice, display);
+#else
+    auto intError = mComposer->destroyVirtualDisplay(display);
+#endif
     auto error = static_cast<Error>(intError);
     ALOGE_IF(error != Error::None, "destroyVirtualDisplay(%" PRIu64 ") failed:"
             " %s (%d)", display, to_string(error).c_str(), intError);
@@ -498,14 +573,22 @@
 
 Error Display::acceptChanges()
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mAcceptDisplayChanges(mDevice.mHwcDevice, mId);
+#else
+    auto intError = mDevice.mComposer->acceptDisplayChanges(mId);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Display::createLayer(std::shared_ptr<Layer>* outLayer)
 {
     hwc2_layer_t layerId = 0;
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mCreateLayer(mDevice.mHwcDevice, mId, &layerId);
+#else
+    auto intError = mDevice.mComposer->createLayer(mId, layerId);
+#endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None) {
         return error;
@@ -522,8 +605,12 @@
 {
     ALOGV("[%" PRIu64 "] getActiveConfig", mId);
     hwc2_config_t configId = 0;
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mGetActiveConfig(mDevice.mHwcDevice, mId,
             &configId);
+#else
+    auto intError = mDevice.mComposer->getActiveConfig(mId, configId);
+#endif
     auto error = static_cast<Error>(intError);
 
     if (error != Error::None) {
@@ -546,6 +633,7 @@
 Error Display::getChangedCompositionTypes(
         std::unordered_map<std::shared_ptr<Layer>, Composition>* outTypes)
 {
+#ifdef BYPASS_IHWC
     uint32_t numElements = 0;
     int32_t intError = mDevice.mGetChangedCompositionTypes(mDevice.mHwcDevice,
             mId, &numElements, nullptr, nullptr);
@@ -558,6 +646,14 @@
     std::vector<int32_t> types(numElements);
     intError = mDevice.mGetChangedCompositionTypes(mDevice.mHwcDevice, mId,
             &numElements, layerIds.data(), types.data());
+#else
+    std::vector<Hwc2::Layer> layerIds;
+    std::vector<Hwc2::IComposer::Composition> types;
+    auto intError = mDevice.mComposer->getChangedCompositionTypes(mId,
+            layerIds, types);
+    uint32_t numElements = layerIds.size();
+    auto error = static_cast<Error>(intError);
+#endif
     error = static_cast<Error>(intError);
     if (error != Error::None) {
         return error;
@@ -583,6 +679,7 @@
 
 Error Display::getColorModes(std::vector<android_color_mode_t>* outModes) const
 {
+#ifdef BYPASS_IHWC
     uint32_t numModes = 0;
     int32_t intError = mDevice.mGetColorModes(mDevice.mHwcDevice, mId,
             &numModes, nullptr);
@@ -595,6 +692,12 @@
     intError = mDevice.mGetColorModes(mDevice.mHwcDevice, mId, &numModes,
             modes.data());
     error = static_cast<Error>(intError);
+#else
+    std::vector<Hwc2::ColorMode> modes;
+    auto intError = mDevice.mComposer->getColorModes(mId, modes);
+    uint32_t numModes = modes.size();
+    auto error = static_cast<Error>(intError);
+#endif
     if (error != Error::None) {
         return error;
     }
@@ -617,6 +720,7 @@
 
 Error Display::getName(std::string* outName) const
 {
+#ifdef BYPASS_IHWC
     uint32_t size;
     int32_t intError = mDevice.mGetDisplayName(mDevice.mHwcDevice, mId, &size,
             nullptr);
@@ -635,12 +739,17 @@
 
     *outName = std::string(rawName.cbegin(), rawName.cend());
     return Error::None;
+#else
+    auto intError = mDevice.mComposer->getDisplayName(mId, *outName);
+    return static_cast<Error>(intError);
+#endif
 }
 
 Error Display::getRequests(HWC2::DisplayRequest* outDisplayRequests,
         std::unordered_map<std::shared_ptr<Layer>, LayerRequest>*
                 outLayerRequests)
 {
+#ifdef BYPASS_IHWC
     int32_t intDisplayRequests = 0;
     uint32_t numElements = 0;
     int32_t intError = mDevice.mGetDisplayRequests(mDevice.mHwcDevice, mId,
@@ -656,6 +765,15 @@
             &intDisplayRequests, &numElements, layerIds.data(),
             layerRequests.data());
     error = static_cast<Error>(intError);
+#else
+    uint32_t intDisplayRequests;
+    std::vector<Hwc2::Layer> layerIds;
+    std::vector<uint32_t> layerRequests;
+    auto intError = mDevice.mComposer->getDisplayRequests(mId,
+            intDisplayRequests, layerIds, layerRequests);
+    uint32_t numElements = layerIds.size();
+    auto error = static_cast<Error>(intError);
+#endif
     if (error != Error::None) {
         return error;
     }
@@ -680,9 +798,15 @@
 
 Error Display::getType(DisplayType* outType) const
 {
+#ifdef BYPASS_IHWC
     int32_t intType = 0;
     int32_t intError = mDevice.mGetDisplayType(mDevice.mHwcDevice, mId,
             &intType);
+#else
+    Hwc2::IComposer::DisplayType intType =
+        Hwc2::IComposer::DisplayType::INVALID;
+    auto intError = mDevice.mComposer->getDisplayType(mId, intType);
+#endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None) {
         return error;
@@ -694,9 +818,14 @@
 
 Error Display::supportsDoze(bool* outSupport) const
 {
+#ifdef BYPASS_IHWC
     int32_t intSupport = 0;
     int32_t intError = mDevice.mGetDozeSupport(mDevice.mHwcDevice, mId,
             &intSupport);
+#else
+    bool intSupport = false;
+    auto intError = mDevice.mComposer->getDozeSupport(mId, intSupport);
+#endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None) {
         return error;
@@ -712,6 +841,7 @@
     float maxLuminance = -1.0f;
     float maxAverageLuminance = -1.0f;
     float minLuminance = -1.0f;
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mGetHdrCapabilities(mDevice.mHwcDevice, mId,
             &numTypes, nullptr, &maxLuminance, &maxAverageLuminance,
             &minLuminance);
@@ -724,6 +854,18 @@
     intError = mDevice.mGetHdrCapabilities(mDevice.mHwcDevice, mId, &numTypes,
             types.data(), &maxLuminance, &maxAverageLuminance, &minLuminance);
     error = static_cast<HWC2::Error>(intError);
+#else
+    std::vector<Hwc2::Hdr> intTypes;
+    auto intError = mDevice.mComposer->getHdrCapabilities(mId, intTypes,
+            maxLuminance, maxAverageLuminance, minLuminance);
+    auto error = static_cast<HWC2::Error>(intError);
+
+    std::vector<int32_t> types;
+    for (auto type : intTypes) {
+        types.push_back(static_cast<int32_t>(type));
+    }
+    numTypes = types.size();
+#endif
     if (error != Error::None) {
         return error;
     }
@@ -736,6 +878,7 @@
 Error Display::getReleaseFences(
         std::unordered_map<std::shared_ptr<Layer>, sp<Fence>>* outFences) const
 {
+#ifdef BYPASS_IHWC
     uint32_t numElements = 0;
     int32_t intError = mDevice.mGetReleaseFences(mDevice.mHwcDevice, mId,
             &numElements, nullptr, nullptr);
@@ -749,6 +892,14 @@
     intError = mDevice.mGetReleaseFences(mDevice.mHwcDevice, mId, &numElements,
             layerIds.data(), fenceFds.data());
     error = static_cast<Error>(intError);
+#else
+    std::vector<Hwc2::Layer> layerIds;
+    std::vector<int> fenceFds;
+    auto intError = mDevice.mComposer->getReleaseFences(mId,
+            layerIds, fenceFds);
+    auto error = static_cast<Error>(intError);
+    uint32_t numElements = layerIds.size();
+#endif
     if (error != Error::None) {
         return error;
     }
@@ -774,8 +925,12 @@
 Error Display::present(sp<Fence>* outRetireFence)
 {
     int32_t retireFenceFd = 0;
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mPresentDisplay(mDevice.mHwcDevice, mId,
             &retireFenceFd);
+#else
+    auto intError = mDevice.mComposer->presentDisplay(mId, retireFenceFd);
+#endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None) {
         return error;
@@ -793,8 +948,12 @@
                 config->getDisplayId(), mId);
         return Error::BadConfig;
     }
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetActiveConfig(mDevice.mHwcDevice, mId,
             config->getId());
+#else
+    auto intError = mDevice.mComposer->setActiveConfig(mId, config->getId());
+#endif
     return static_cast<Error>(intError);
 }
 
@@ -803,22 +962,38 @@
 {
     // TODO: Properly encode client target surface damage
     int32_t fenceFd = acquireFence->dup();
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetClientTarget(mDevice.mHwcDevice, mId, target,
             fenceFd, static_cast<int32_t>(dataspace), {0, nullptr});
+#else
+    auto intError = mDevice.mComposer->setClientTarget(mId, target, fenceFd,
+            static_cast<Hwc2::Dataspace>(dataspace),
+            std::vector<Hwc2::IComposer::Rect>());
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Display::setColorMode(android_color_mode_t mode)
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetColorMode(mDevice.mHwcDevice, mId, mode);
+#else
+    auto intError = mDevice.mComposer->setColorMode(mId,
+            static_cast<Hwc2::ColorMode>(mode));
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Display::setColorTransform(const android::mat4& matrix,
         android_color_transform_t hint)
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetColorTransform(mDevice.mHwcDevice, mId,
             matrix.asArray(), static_cast<int32_t>(hint));
+#else
+    auto intError = mDevice.mComposer->setColorTransform(mId,
+            matrix.asArray(), static_cast<Hwc2::ColorTransform>(hint));
+#endif
     return static_cast<Error>(intError);
 }
 
@@ -827,24 +1002,38 @@
 {
     int32_t fenceFd = releaseFence->dup();
     auto handle = buffer->getNativeBuffer()->handle;
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetOutputBuffer(mDevice.mHwcDevice, mId, handle,
             fenceFd);
+#else
+    auto intError = mDevice.mComposer->setOutputBuffer(mId, handle, fenceFd);
+#endif
     close(fenceFd);
     return static_cast<Error>(intError);
 }
 
 Error Display::setPowerMode(PowerMode mode)
 {
+#ifdef BYPASS_IHWC
     auto intMode = static_cast<int32_t>(mode);
     int32_t intError = mDevice.mSetPowerMode(mDevice.mHwcDevice, mId, intMode);
+#else
+    auto intMode = static_cast<Hwc2::IComposer::PowerMode>(mode);
+    auto intError = mDevice.mComposer->setPowerMode(mId, intMode);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Display::setVsyncEnabled(Vsync enabled)
 {
+#ifdef BYPASS_IHWC
     auto intEnabled = static_cast<int32_t>(enabled);
     int32_t intError = mDevice.mSetVsyncEnabled(mDevice.mHwcDevice, mId,
             intEnabled);
+#else
+    auto intEnabled = static_cast<Hwc2::IComposer::Vsync>(enabled);
+    auto intError = mDevice.mComposer->setVsyncEnabled(mId, intEnabled);
+#endif
     return static_cast<Error>(intError);
 }
 
@@ -852,8 +1041,13 @@
 {
     uint32_t numTypes = 0;
     uint32_t numRequests = 0;
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mValidateDisplay(mDevice.mHwcDevice, mId,
             &numTypes, &numRequests);
+#else
+    auto intError = mDevice.mComposer->validateDisplay(mId,
+            numTypes, numRequests);
+#endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None && error != Error::HasChanges) {
         return error;
@@ -869,8 +1063,14 @@
 int32_t Display::getAttribute(hwc2_config_t configId, Attribute attribute)
 {
     int32_t value = 0;
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mGetDisplayAttribute(mDevice.mHwcDevice, mId,
             configId, static_cast<int32_t>(attribute), &value);
+#else
+    auto intError = mDevice.mComposer->getDisplayAttribute(mId,
+            configId, static_cast<Hwc2::IComposer::Attribute>(attribute),
+            value);
+#endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None) {
         ALOGE("getDisplayAttribute(%" PRIu64 ", %u, %s) failed: %s (%d)", mId,
@@ -899,6 +1099,7 @@
 {
     ALOGV("[%" PRIu64 "] loadConfigs", mId);
 
+#ifdef BYPASS_IHWC
     uint32_t numConfigs = 0;
     int32_t intError = mDevice.mGetDisplayConfigs(mDevice.mHwcDevice, mId,
             &numConfigs, nullptr);
@@ -913,6 +1114,11 @@
     intError = mDevice.mGetDisplayConfigs(mDevice.mHwcDevice, mId, &numConfigs,
             configIds.data());
     error = static_cast<Error>(intError);
+#else
+    std::vector<Hwc2::Config> configIds;
+    auto intError = mDevice.mComposer->getDisplayConfigs(mId, configIds);
+    auto error = static_cast<Error>(intError);
+#endif
     if (error != Error::None) {
         ALOGE("[%" PRIu64 "] getDisplayConfigs [2] failed: %s (%d)", mId,
                 to_string(error).c_str(), intError);
@@ -928,7 +1134,11 @@
 
 void Display::destroyLayer(hwc2_layer_t layerId)
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mDestroyLayer(mDevice.mHwcDevice, mId, layerId);
+#else
+    auto intError =mDevice.mComposer->destroyLayer(mId, layerId);
+#endif
     auto error = static_cast<Error>(intError);
     ALOGE_IF(error != Error::None, "destroyLayer(%" PRIu64 ", %" PRIu64 ")"
             " failed: %s (%d)", mId, layerId, to_string(error).c_str(),
@@ -970,8 +1180,13 @@
 
 Error Layer::setCursorPosition(int32_t x, int32_t y)
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetCursorPosition(mDevice.mHwcDevice,
             mDisplayId, mId, x, y);
+#else
+    auto intError = mDevice.mComposer->setCursorPosition(mDisplayId,
+            mId, x, y);
+#endif
     return static_cast<Error>(intError);
 }
 
@@ -979,8 +1194,13 @@
         const sp<Fence>& acquireFence)
 {
     int32_t fenceFd = acquireFence->dup();
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetLayerBuffer(mDevice.mHwcDevice, mDisplayId,
             mId, buffer, fenceFd);
+#else
+    auto intError = mDevice.mComposer->setLayerBuffer(mDisplayId,
+            mId, buffer, fenceFd);
+#endif
     return static_cast<Error>(intError);
 }
 
@@ -988,26 +1208,44 @@
 {
     // We encode default full-screen damage as INVALID_RECT upstream, but as 0
     // rects for HWC
+#ifdef BYPASS_IHWC
     int32_t intError = 0;
+#else
+    Hwc2::Error intError = Hwc2::Error::NONE;
+#endif
     if (damage.isRect() && damage.getBounds() == Rect::INVALID_RECT) {
+#ifdef BYPASS_IHWC
         intError = mDevice.mSetLayerSurfaceDamage(mDevice.mHwcDevice,
                 mDisplayId, mId, {0, nullptr});
+#else
+        intError = mDevice.mComposer->setLayerSurfaceDamage(mDisplayId,
+                mId, std::vector<Hwc2::IComposer::Rect>());
+#endif
     } else {
         size_t rectCount = 0;
         auto rectArray = damage.getArray(&rectCount);
 
+#ifdef BYPASS_IHWC
         std::vector<hwc_rect_t> hwcRects;
+#else
+        std::vector<Hwc2::IComposer::Rect> hwcRects;
+#endif
         for (size_t rect = 0; rect < rectCount; ++rect) {
             hwcRects.push_back({rectArray[rect].left, rectArray[rect].top,
                     rectArray[rect].right, rectArray[rect].bottom});
         }
 
+#ifdef BYPASS_IHWC
         hwc_region_t hwcRegion = {};
         hwcRegion.numRects = rectCount;
         hwcRegion.rects = hwcRects.data();
 
         intError = mDevice.mSetLayerSurfaceDamage(mDevice.mHwcDevice,
                 mDisplayId, mId, hwcRegion);
+#else
+        intError = mDevice.mComposer->setLayerSurfaceDamage(mDisplayId,
+                mId, hwcRects);
+#endif
     }
 
     return static_cast<Error>(intError);
@@ -1015,47 +1253,83 @@
 
 Error Layer::setBlendMode(BlendMode mode)
 {
+#ifdef BYPASS_IHWC
     auto intMode = static_cast<int32_t>(mode);
     int32_t intError = mDevice.mSetLayerBlendMode(mDevice.mHwcDevice,
             mDisplayId, mId, intMode);
+#else
+    auto intMode = static_cast<Hwc2::IComposer::BlendMode>(mode);
+    auto intError = mDevice.mComposer->setLayerBlendMode(mDisplayId,
+            mId, intMode);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setColor(hwc_color_t color)
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetLayerColor(mDevice.mHwcDevice, mDisplayId,
             mId, color);
+#else
+    Hwc2::IComposer::Color hwcColor{color.r, color.g, color.b, color.a};
+    auto intError = mDevice.mComposer->setLayerColor(mDisplayId,
+            mId, hwcColor);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setCompositionType(Composition type)
 {
+#ifdef BYPASS_IHWC
     auto intType = static_cast<int32_t>(type);
     int32_t intError = mDevice.mSetLayerCompositionType(mDevice.mHwcDevice,
             mDisplayId, mId, intType);
+#else
+    auto intType = static_cast<Hwc2::IComposer::Composition>(type);
+    auto intError = mDevice.mComposer->setLayerCompositionType(mDisplayId,
+            mId, intType);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setDataspace(android_dataspace_t dataspace)
 {
+#ifdef BYPASS_IHWC
     auto intDataspace = static_cast<int32_t>(dataspace);
     int32_t intError = mDevice.mSetLayerDataspace(mDevice.mHwcDevice,
             mDisplayId, mId, intDataspace);
+#else
+    auto intDataspace = static_cast<Hwc2::Dataspace>(dataspace);
+    auto intError = mDevice.mComposer->setLayerDataspace(mDisplayId,
+            mId, intDataspace);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setDisplayFrame(const Rect& frame)
 {
+#ifdef BYPASS_IHWC
     hwc_rect_t hwcRect{frame.left, frame.top, frame.right, frame.bottom};
     int32_t intError = mDevice.mSetLayerDisplayFrame(mDevice.mHwcDevice,
             mDisplayId, mId, hwcRect);
+#else
+    Hwc2::IComposer::Rect hwcRect{frame.left, frame.top,
+        frame.right, frame.bottom};
+    auto intError = mDevice.mComposer->setLayerDisplayFrame(mDisplayId,
+            mId, hwcRect);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setPlaneAlpha(float alpha)
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetLayerPlaneAlpha(mDevice.mHwcDevice,
             mDisplayId, mId, alpha);
+#else
+    auto intError = mDevice.mComposer->setLayerPlaneAlpha(mDisplayId,
+            mId, alpha);
+#endif
     return static_cast<Error>(intError);
 }
 
@@ -1066,24 +1340,42 @@
                 "device supports sideband streams");
         return Error::Unsupported;
     }
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetLayerSidebandStream(mDevice.mHwcDevice,
             mDisplayId, mId, stream);
+#else
+    auto intError = mDevice.mComposer->setLayerSidebandStream(mDisplayId,
+            mId, stream);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setSourceCrop(const FloatRect& crop)
 {
+#ifdef BYPASS_IHWC
     hwc_frect_t hwcRect{crop.left, crop.top, crop.right, crop.bottom};
     int32_t intError = mDevice.mSetLayerSourceCrop(mDevice.mHwcDevice,
             mDisplayId, mId, hwcRect);
+#else
+    Hwc2::IComposer::FRect hwcRect{
+        crop.left, crop.top, crop.right, crop.bottom};
+    auto intError = mDevice.mComposer->setLayerSourceCrop(mDisplayId,
+            mId, hwcRect);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setTransform(Transform transform)
 {
+#ifdef BYPASS_IHWC
     auto intTransform = static_cast<int32_t>(transform);
     int32_t intError = mDevice.mSetLayerTransform(mDevice.mHwcDevice,
             mDisplayId, mId, intTransform);
+#else
+    auto intTransform = static_cast<Hwc2::Transform>(transform);
+    auto intError = mDevice.mComposer->setLayerTransform(mDisplayId,
+            mId, intTransform);
+#endif
     return static_cast<Error>(intError);
 }
 
@@ -1092,25 +1384,38 @@
     size_t rectCount = 0;
     auto rectArray = region.getArray(&rectCount);
 
+#ifdef BYPASS_IHWC
     std::vector<hwc_rect_t> hwcRects;
+#else
+    std::vector<Hwc2::IComposer::Rect> hwcRects;
+#endif
     for (size_t rect = 0; rect < rectCount; ++rect) {
         hwcRects.push_back({rectArray[rect].left, rectArray[rect].top,
                 rectArray[rect].right, rectArray[rect].bottom});
     }
 
+#ifdef BYPASS_IHWC
     hwc_region_t hwcRegion = {};
     hwcRegion.numRects = rectCount;
     hwcRegion.rects = hwcRects.data();
 
     int32_t intError = mDevice.mSetLayerVisibleRegion(mDevice.mHwcDevice,
             mDisplayId, mId, hwcRegion);
+#else
+    auto intError = mDevice.mComposer->setLayerVisibleRegion(mDisplayId,
+            mId, hwcRects);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setZOrder(uint32_t z)
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetLayerZOrder(mDevice.mHwcDevice, mDisplayId,
             mId, z);
+#else
+    auto intError = mDevice.mComposer->setLayerZOrder(mDisplayId, mId, z);
+#endif
     return static_cast<Error>(intError);
 }
 
diff --git a/services/surfaceflinger/DisplayHardware/HWC2.h b/services/surfaceflinger/DisplayHardware/HWC2.h
index 32a9de0..1145ba1 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.h
+++ b/services/surfaceflinger/DisplayHardware/HWC2.h
@@ -17,6 +17,10 @@
 #ifndef ANDROID_SF_HWC2_H
 #define ANDROID_SF_HWC2_H
 
+#ifndef USE_HWC2
+#define BYPASS_IHWC
+#endif
+
 #define HWC2_INCLUDE_STRINGIFICATION
 #define HWC2_USE_CPP11
 #include <hardware/hwcomposer2.h>
@@ -42,6 +46,9 @@
     class GraphicBuffer;
     class Rect;
     class Region;
+    namespace Hwc2 {
+        class Composer;
+    };
 }
 
 namespace HWC2 {
@@ -57,7 +64,11 @@
 class Device
 {
 public:
+#ifdef BYPASS_IHWC
     explicit Device(hwc2_device_t* device);
+#else
+    Device();
+#endif
     ~Device();
 
     friend class HWC2::Display;
@@ -98,6 +109,7 @@
 private:
     // Initialization methods
 
+#ifdef BYPASS_IHWC
     template <typename PFN>
     [[clang::warn_unused_result]] bool loadFunctionPointer(
             FunctionDescriptor desc, PFN& outPFN) {
@@ -121,6 +133,7 @@
         auto pfn = reinterpret_cast<hwc2_function_pointer_t>(hook);
         mRegisterCallback(mHwcDevice, intCallback, callbackData, pfn);
     }
+#endif
 
     void loadCapabilities();
     void loadFunctionPointers();
@@ -132,6 +145,7 @@
 
     // Member variables
 
+#ifdef BYPASS_IHWC
     hwc2_device_t* mHwcDevice;
 
     // Device function pointers
@@ -181,6 +195,9 @@
     HWC2_PFN_SET_LAYER_TRANSFORM mSetLayerTransform;
     HWC2_PFN_SET_LAYER_VISIBLE_REGION mSetLayerVisibleRegion;
     HWC2_PFN_SET_LAYER_Z_ORDER mSetLayerZOrder;
+#else
+    std::unique_ptr<android::Hwc2::Composer> mComposer;
+#endif // BYPASS_IHWC
 
     std::unordered_set<Capability> mCapabilities;
     std::unordered_map<hwc2_display_t, std::weak_ptr<Display>> mDisplays;
diff --git a/services/surfaceflinger/DisplayHardware/HWC2On1Adapter.cpp b/services/surfaceflinger/DisplayHardware/HWC2On1Adapter.cpp
index cc0dfb0..b699b2c 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2On1Adapter.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWC2On1Adapter.cpp
@@ -93,7 +93,7 @@
 
 class HWC2On1Adapter::Callbacks : public hwc_procs_t {
     public:
-        Callbacks(HWC2On1Adapter& adapter) : mAdapter(adapter) {
+        explicit Callbacks(HWC2On1Adapter& adapter) : mAdapter(adapter) {
             invalidate = &invalidateHook;
             vsync = &vsyncHook;
             hotplug = &hotplugHook;
@@ -560,6 +560,7 @@
     mHwc1Id(-1),
     mConfigs(),
     mActiveConfig(nullptr),
+    mActiveColorMode(static_cast<android_color_mode_t>(-1)),
     mName(),
     mType(type),
     mPowerMode(PowerMode::Off),
diff --git a/services/surfaceflinger/DisplayHardware/HWC2On1Adapter.h b/services/surfaceflinger/DisplayHardware/HWC2On1Adapter.h
index 962361e..047e3aa 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2On1Adapter.h
+++ b/services/surfaceflinger/DisplayHardware/HWC2On1Adapter.h
@@ -247,6 +247,7 @@
                 public:
                     Config(Display& display)
                       : mDisplay(display),
+                        mId(0),
                         mAttributes() {}
 
                     bool isOnDisplay(const Display& display) const {
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.cpp b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
index c87ba72..bb2e45a 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
@@ -109,6 +109,7 @@
 {
     ALOGV("loadHwcModule");
 
+#ifdef BYPASS_IHWC
     hw_module_t const* module;
 
     if (hw_get_module(HWC_HARDWARE_MODULE_ID, &module) != 0) {
@@ -140,6 +141,9 @@
         mHwcDevice = std::make_unique<HWC2::Device>(
                 static_cast<hwc2_device_t*>(mAdapter.get()));
     }
+#else
+    mHwcDevice = std::make_unique<HWC2::Device>();
+#endif
 
     mRemainingHwcVirtualDisplays = mHwcDevice->getMaxVirtualDisplayCount();
 }
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer_hwc1.cpp b/services/surfaceflinger/DisplayHardware/HWComposer_hwc1.cpp
index ef41658..2102457 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer_hwc1.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWComposer_hwc1.cpp
@@ -933,7 +933,7 @@
 protected:
     HWCTYPE* const mLayerList;
     HWCTYPE* mCurrentLayer;
-    Iterable(HWCTYPE* layer) : mLayerList(layer), mCurrentLayer(layer),
+    explicit Iterable(HWCTYPE* layer) : mLayerList(layer), mCurrentLayer(layer),
             mIndex(0) { }
     inline HWCTYPE const * getLayer() const { return mCurrentLayer; }
     inline HWCTYPE* getLayer() { return mCurrentLayer; }
diff --git a/services/surfaceflinger/DisplayHardware/PowerHAL.cpp b/services/surfaceflinger/DisplayHardware/PowerHAL.cpp
index bd50b4a..1c0a1fe 100644
--- a/services/surfaceflinger/DisplayHardware/PowerHAL.cpp
+++ b/services/surfaceflinger/DisplayHardware/PowerHAL.cpp
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include <android/hardware/power/1.0/IPower.h>
 #include <stdint.h>
 #include <sys/types.h>
 
@@ -26,6 +27,7 @@
 
 #include "PowerHAL.h"
 
+using android::hardware::power::V1_0::PowerHint;
 namespace android {
 // ---------------------------------------------------------------------------
 
@@ -39,7 +41,9 @@
         }
         mPowerManager = interface_cast<IPowerManager>(bs);
     }
-    status_t status = mPowerManager->powerHint(POWER_HINT_VSYNC, enabled ? 1 : 0);
+    status_t status;
+    status = mPowerManager->powerHint(static_cast<int>(PowerHint::VSYNC),
+            enabled ? 1 : 0);
     if(status == DEAD_OBJECT) {
         mPowerManager = NULL;
     }
diff --git a/services/surfaceflinger/EventThread.cpp b/services/surfaceflinger/EventThread.cpp
index dd88adb..d1bc7eb 100644
--- a/services/surfaceflinger/EventThread.cpp
+++ b/services/surfaceflinger/EventThread.cpp
@@ -44,13 +44,14 @@
     return;
 }
 
-EventThread::EventThread(const sp<VSyncSource>& src, SurfaceFlinger& flinger)
+EventThread::EventThread(const sp<VSyncSource>& src, SurfaceFlinger& flinger, bool interceptVSyncs)
     : mVSyncSource(src),
       mFlinger(flinger),
       mUseSoftwareVSync(false),
       mVsyncEnabled(false),
       mDebugVsyncEnabled(false),
-      mVsyncHintSent(false) {
+      mVsyncHintSent(false),
+      mInterceptVSyncs(interceptVSyncs) {
 
     for (int32_t i=0 ; i<DisplayDevice::NUM_BUILTIN_DISPLAY_TYPES ; i++) {
         mVSyncEvent[i].header.type = DisplayEventReceiver::DISPLAY_EVENT_VSYNC;
@@ -226,6 +227,9 @@
             timestamp = mVSyncEvent[i].header.timestamp;
             if (timestamp) {
                 // we have a vsync event to dispatch
+                if (mInterceptVSyncs) {
+                    mFlinger.mInterceptor.saveVSyncEvent(timestamp);
+                }
                 *event = mVSyncEvent[i];
                 mVSyncEvent[i].header.timestamp = 0;
                 vsyncCount = mVSyncEvent[i].vsync.count;
diff --git a/services/surfaceflinger/EventThread.h b/services/surfaceflinger/EventThread.h
index b635115..3f1d0bb 100644
--- a/services/surfaceflinger/EventThread.h
+++ b/services/surfaceflinger/EventThread.h
@@ -77,7 +77,7 @@
 
 public:
 
-    EventThread(const sp<VSyncSource>& src, SurfaceFlinger& flinger);
+    EventThread(const sp<VSyncSource>& src, SurfaceFlinger& flinger, bool interceptVSyncs);
 
     sp<Connection> createEventConnection() const;
     status_t registerDisplayEventConnection(const sp<Connection>& connection);
@@ -132,6 +132,7 @@
     bool mDebugVsyncEnabled;
 
     bool mVsyncHintSent;
+    const bool mInterceptVSyncs;
     timer_t mTimerId;
 };
 
diff --git a/services/surfaceflinger/GpuService.cpp b/services/surfaceflinger/GpuService.cpp
index 70d9682..b993dfb 100644
--- a/services/surfaceflinger/GpuService.cpp
+++ b/services/surfaceflinger/GpuService.cpp
@@ -27,7 +27,7 @@
 class BpGpuService : public BpInterface<IGpuService>
 {
 public:
-    BpGpuService(const sp<IBinder>& impl) : BpInterface<IGpuService>(impl) {}
+    explicit BpGpuService(const sp<IBinder>& impl) : BpInterface<IGpuService>(impl) {}
 };
 
 IMPLEMENT_META_INTERFACE(GpuService, "android.ui.IGpuService");
@@ -92,82 +92,27 @@
     }
     fprintf(outs,
         "GPU Service commands:\n"
-        "  vkjson   dump Vulkan device capabilities as JSON\n");
+        "  vkjson   dump Vulkan properties as JSON\n");
     fclose(outs);
     return NO_ERROR;
 }
 
-VkResult vkjsonPrint(FILE* out, FILE* err) {
-    VkResult result;
-
-    const VkApplicationInfo app_info = {
-        VK_STRUCTURE_TYPE_APPLICATION_INFO, nullptr,
-        "vkjson", 1,    /* app name, version */
-        "", 0,          /* engine name, version */
-        VK_API_VERSION_1_0
-    };
-    const VkInstanceCreateInfo instance_info = {
-        VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO, nullptr,
-        0,              /* flags */
-        &app_info,
-        0, nullptr,     /* layers */
-        0, nullptr,     /* extensions */
-    };
-    VkInstance instance;
-    result = vkCreateInstance(&instance_info, nullptr, &instance);
-    if (result != VK_SUCCESS) {
-        fprintf(err, "vkCreateInstance failed: %d\n", result);
-        return result;
-    }
-
-    uint32_t ngpu = 0;
-    result = vkEnumeratePhysicalDevices(instance, &ngpu, nullptr);
-    if (result != VK_SUCCESS) {
-        fprintf(err, "vkEnumeratePhysicalDevices failed: %d\n", result);
-        return result;
-    }
-    std::vector<VkPhysicalDevice> gpus(ngpu, VK_NULL_HANDLE);
-    result = vkEnumeratePhysicalDevices(instance, &ngpu, gpus.data());
-    if (result != VK_SUCCESS) {
-        fprintf(err, "vkEnumeratePhysicalDevices failed: %d\n", result);
-        return result;
-    }
-
-    for (size_t i = 0, n = gpus.size(); i < n; i++) {
-        auto props = VkJsonGetAllProperties(gpus[i]);
-        std::string json = VkJsonAllPropertiesToJson(props);
-        fwrite(json.data(), 1, json.size(), out);
-        if (i < n - 1)
-            fputc(',', out);
-        fputc('\n', out);
-    }
-
-    vkDestroyInstance(instance, nullptr);
-
-    return VK_SUCCESS;
+void vkjsonPrint(FILE* out) {
+    std::string json = VkJsonInstanceToJson(VkJsonGetInstance());
+    fwrite(json.data(), 1, json.size(), out);
+    fputc('\n', out);
 }
 
-status_t cmd_vkjson(int out, int err) {
-    int errnum;
+status_t cmd_vkjson(int out, int /*err*/) {
     FILE* outs = fdopen(out, "w");
     if (!outs) {
-        errnum = errno;
+        int errnum = errno;
         ALOGE("vkjson: failed to create output stream: %s", strerror(errnum));
         return -errnum;
     }
-    FILE* errs = fdopen(err, "w");
-    if (!errs) {
-        errnum = errno;
-        ALOGE("vkjson: failed to create error stream: %s", strerror(errnum));
-        fclose(outs);
-        return -errnum;
-    }
-    fprintf(outs, "[\n");
-    VkResult result = vkjsonPrint(outs, errs);
-    fprintf(outs, "]\n");
-    fclose(errs);
+    vkjsonPrint(outs);
     fclose(outs);
-    return result >= 0 ? NO_ERROR : UNKNOWN_ERROR;
+    return NO_ERROR;
 }
 
 } // anonymous namespace
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index d13b6db..d420f0f 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -155,10 +155,9 @@
     // Creates a custom BufferQueue for SurfaceFlingerConsumer to use
     sp<IGraphicBufferProducer> producer;
     sp<IGraphicBufferConsumer> consumer;
-    BufferQueue::createBufferQueue(&producer, &consumer);
+    BufferQueue::createBufferQueue(&producer, &consumer, nullptr, true);
     mProducer = new MonitoredProducer(producer, mFlinger);
-    mSurfaceFlingerConsumer = new SurfaceFlingerConsumer(consumer, mTextureName,
-            this);
+    mSurfaceFlingerConsumer = new SurfaceFlingerConsumer(consumer, mTextureName, this);
     mSurfaceFlingerConsumer->setConsumerUsageBits(getEffectiveUsage(0));
     mSurfaceFlingerConsumer->setContentsChangedListener(this);
     mSurfaceFlingerConsumer->setName(mName);
@@ -212,7 +211,8 @@
     // Add this buffer from our internal queue tracker
     { // Autolock scope
         Mutex::Autolock lock(mQueueItemLock);
-
+        mFlinger->mInterceptor.saveBufferUpdate(this, item.mGraphicBuffer->getWidth(),
+                item.mGraphicBuffer->getHeight(), item.mFrameNumber);
         // Reset the frame number tracker when we receive the first buffer after
         // a frame number reset
         if (item.mFrameNumber == 1) {
@@ -312,22 +312,6 @@
     return NO_ERROR;
 }
 
-/*
- * The layer handle is just a BBinder object passed to the client
- * (remote process) -- we don't keep any reference on our side such that
- * the dtor is called when the remote side let go of its reference.
- *
- * LayerCleaner ensures that mFlinger->onLayerDestroyed() is called for
- * this layer when the handle is destroyed.
- */
-class Layer::Handle : public BBinder, public LayerCleaner {
-    public:
-        Handle(const sp<SurfaceFlinger>& flinger, const sp<Layer>& layer)
-            : LayerCleaner(flinger, layer), owner(layer) {}
-
-        wp<Layer> owner;
-};
-
 sp<IBinder> Layer::getHandle() {
     Mutex::Autolock _l(mLock);
 
@@ -1819,127 +1803,81 @@
     }
 
     Region outDirtyRegion;
-    if (mQueuedFrames > 0 || mAutoRefresh) {
+    if (mQueuedFrames <= 0 && !mAutoRefresh) {
+        return outDirtyRegion;
+    }
 
-        // if we've already called updateTexImage() without going through
-        // a composition step, we have to skip this layer at this point
-        // because we cannot call updateTeximage() without a corresponding
-        // compositionComplete() call.
-        // we'll trigger an update in onPreComposition().
-        if (mRefreshPending) {
-            return outDirtyRegion;
+    // if we've already called updateTexImage() without going through
+    // a composition step, we have to skip this layer at this point
+    // because we cannot call updateTeximage() without a corresponding
+    // compositionComplete() call.
+    // we'll trigger an update in onPreComposition().
+    if (mRefreshPending) {
+        return outDirtyRegion;
+    }
+
+    // If the head buffer's acquire fence hasn't signaled yet, return and
+    // try again later
+    if (!headFenceHasSignaled()) {
+        mFlinger->signalLayerUpdate();
+        return outDirtyRegion;
+    }
+
+    // Capture the old state of the layer for comparisons later
+    const State& s(getDrawingState());
+    const bool oldOpacity = isOpaque(s);
+    sp<GraphicBuffer> oldActiveBuffer = mActiveBuffer;
+
+    struct Reject : public SurfaceFlingerConsumer::BufferRejecter {
+        Layer::State& front;
+        Layer::State& current;
+        bool& recomputeVisibleRegions;
+        bool stickyTransformSet;
+        const char* name;
+        int32_t overrideScalingMode;
+        bool& freezePositionUpdates;
+
+        Reject(Layer::State& front, Layer::State& current,
+                bool& recomputeVisibleRegions, bool stickySet,
+                const char* name,
+                int32_t overrideScalingMode,
+                bool& freezePositionUpdates)
+            : front(front), current(current),
+              recomputeVisibleRegions(recomputeVisibleRegions),
+              stickyTransformSet(stickySet),
+              name(name),
+              overrideScalingMode(overrideScalingMode),
+              freezePositionUpdates(freezePositionUpdates) {
         }
 
-        // If the head buffer's acquire fence hasn't signaled yet, return and
-        // try again later
-        if (!headFenceHasSignaled()) {
-            mFlinger->signalLayerUpdate();
-            return outDirtyRegion;
-        }
-
-        // Capture the old state of the layer for comparisons later
-        const State& s(getDrawingState());
-        const bool oldOpacity = isOpaque(s);
-        sp<GraphicBuffer> oldActiveBuffer = mActiveBuffer;
-
-        struct Reject : public SurfaceFlingerConsumer::BufferRejecter {
-            Layer::State& front;
-            Layer::State& current;
-            bool& recomputeVisibleRegions;
-            bool stickyTransformSet;
-            const char* name;
-            int32_t overrideScalingMode;
-            bool& freezePositionUpdates;
-
-            Reject(Layer::State& front, Layer::State& current,
-                    bool& recomputeVisibleRegions, bool stickySet,
-                    const char* name,
-                    int32_t overrideScalingMode,
-                    bool& freezePositionUpdates)
-                : front(front), current(current),
-                  recomputeVisibleRegions(recomputeVisibleRegions),
-                  stickyTransformSet(stickySet),
-                  name(name),
-                  overrideScalingMode(overrideScalingMode),
-                  freezePositionUpdates(freezePositionUpdates) {
+        virtual bool reject(const sp<GraphicBuffer>& buf,
+                const BufferItem& item) {
+            if (buf == NULL) {
+                return false;
             }
 
-            virtual bool reject(const sp<GraphicBuffer>& buf,
-                    const BufferItem& item) {
-                if (buf == NULL) {
-                    return false;
-                }
+            uint32_t bufWidth  = buf->getWidth();
+            uint32_t bufHeight = buf->getHeight();
 
-                uint32_t bufWidth  = buf->getWidth();
-                uint32_t bufHeight = buf->getHeight();
+            // check that we received a buffer of the right size
+            // (Take the buffer's orientation into account)
+            if (item.mTransform & Transform::ROT_90) {
+                swap(bufWidth, bufHeight);
+            }
 
-                // check that we received a buffer of the right size
-                // (Take the buffer's orientation into account)
-                if (item.mTransform & Transform::ROT_90) {
-                    swap(bufWidth, bufHeight);
-                }
+            int actualScalingMode = overrideScalingMode >= 0 ?
+                    overrideScalingMode : item.mScalingMode;
+            bool isFixedSize = actualScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE;
+            if (front.active != front.requested) {
 
-                int actualScalingMode = overrideScalingMode >= 0 ?
-                        overrideScalingMode : item.mScalingMode;
-                bool isFixedSize = actualScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE;
-                if (front.active != front.requested) {
-
-                    if (isFixedSize ||
-                            (bufWidth == front.requested.w &&
-                             bufHeight == front.requested.h))
-                    {
-                        // Here we pretend the transaction happened by updating the
-                        // current and drawing states. Drawing state is only accessed
-                        // in this thread, no need to have it locked
-                        front.active = front.requested;
-
-                        // We also need to update the current state so that
-                        // we don't end-up overwriting the drawing state with
-                        // this stale current state during the next transaction
-                        //
-                        // NOTE: We don't need to hold the transaction lock here
-                        // because State::active is only accessed from this thread.
-                        current.active = front.active;
-                        current.modified = true;
-
-                        // recompute visible region
-                        recomputeVisibleRegions = true;
-                    }
-
-                    ALOGD_IF(DEBUG_RESIZE,
-                            "[%s] latchBuffer/reject: buffer (%ux%u, tr=%02x), scalingMode=%d\n"
-                            "  drawing={ active   ={ wh={%4u,%4u} crop={%4d,%4d,%4d,%4d} (%4d,%4d) }\n"
-                            "            requested={ wh={%4u,%4u} }}\n",
-                            name,
-                            bufWidth, bufHeight, item.mTransform, item.mScalingMode,
-                            front.active.w, front.active.h,
-                            front.crop.left,
-                            front.crop.top,
-                            front.crop.right,
-                            front.crop.bottom,
-                            front.crop.getWidth(),
-                            front.crop.getHeight(),
-                            front.requested.w, front.requested.h);
-                }
-
-                if (!isFixedSize && !stickyTransformSet) {
-                    if (front.active.w != bufWidth ||
-                        front.active.h != bufHeight) {
-                        // reject this buffer
-                        ALOGE("[%s] rejecting buffer: "
-                                "bufWidth=%d, bufHeight=%d, front.active.{w=%d, h=%d}",
-                                name, bufWidth, bufHeight, front.active.w, front.active.h);
-                        return true;
-                    }
-                }
-
-                // if the transparent region has changed (this test is
-                // conservative, but that's fine, worst case we're doing
-                // a bit of extra work), we latch the new one and we
-                // trigger a visible-region recompute.
-                if (!front.activeTransparentRegion.isTriviallyEqual(
-                        front.requestedTransparentRegion)) {
-                    front.activeTransparentRegion = front.requestedTransparentRegion;
+                if (isFixedSize ||
+                        (bufWidth == front.requested.w &&
+                         bufHeight == front.requested.h))
+                {
+                    // Here we pretend the transaction happened by updating the
+                    // current and drawing states. Drawing state is only accessed
+                    // in this thread, no need to have it locked
+                    front.active = front.requested;
 
                     // We also need to update the current state so that
                     // we don't end-up overwriting the drawing state with
@@ -1947,206 +1885,254 @@
                     //
                     // NOTE: We don't need to hold the transaction lock here
                     // because State::active is only accessed from this thread.
-                    current.activeTransparentRegion = front.activeTransparentRegion;
+                    current.active = front.active;
+                    current.modified = true;
 
                     // recompute visible region
                     recomputeVisibleRegions = true;
                 }
 
-                if (front.crop != front.requestedCrop) {
-                    front.crop = front.requestedCrop;
-                    current.crop = front.requestedCrop;
-                    recomputeVisibleRegions = true;
+                ALOGD_IF(DEBUG_RESIZE,
+                        "[%s] latchBuffer/reject: buffer (%ux%u, tr=%02x), scalingMode=%d\n"
+                        "  drawing={ active   ={ wh={%4u,%4u} crop={%4d,%4d,%4d,%4d} (%4d,%4d) }\n"
+                        "            requested={ wh={%4u,%4u} }}\n",
+                        name,
+                        bufWidth, bufHeight, item.mTransform, item.mScalingMode,
+                        front.active.w, front.active.h,
+                        front.crop.left,
+                        front.crop.top,
+                        front.crop.right,
+                        front.crop.bottom,
+                        front.crop.getWidth(),
+                        front.crop.getHeight(),
+                        front.requested.w, front.requested.h);
+            }
+
+            if (!isFixedSize && !stickyTransformSet) {
+                if (front.active.w != bufWidth ||
+                    front.active.h != bufHeight) {
+                    // reject this buffer
+                    ALOGE("[%s] rejecting buffer: "
+                            "bufWidth=%d, bufHeight=%d, front.active.{w=%d, h=%d}",
+                            name, bufWidth, bufHeight, front.active.w, front.active.h);
+                    return true;
                 }
-                freezePositionUpdates = false;
-
-                return false;
-            }
-        };
-
-        Reject r(mDrawingState, getCurrentState(), recomputeVisibleRegions,
-                getProducerStickyTransform() != 0, mName.string(),
-                mOverrideScalingMode, mFreezePositionUpdates);
-
-
-        // Check all of our local sync points to ensure that all transactions
-        // which need to have been applied prior to the frame which is about to
-        // be latched have signaled
-
-        auto headFrameNumber = getHeadFrameNumber();
-        bool matchingFramesFound = false;
-        bool allTransactionsApplied = true;
-        {
-            Mutex::Autolock lock(mLocalSyncPointMutex);
-            for (auto& point : mLocalSyncPoints) {
-                if (point->getFrameNumber() > headFrameNumber) {
-                    break;
-                }
-
-                matchingFramesFound = true;
-
-                if (!point->frameIsAvailable()) {
-                    // We haven't notified the remote layer that the frame for
-                    // this point is available yet. Notify it now, and then
-                    // abort this attempt to latch.
-                    point->setFrameAvailable();
-                    allTransactionsApplied = false;
-                    break;
-                }
-
-                allTransactionsApplied &= point->transactionIsApplied();
-            }
-        }
-
-        if (matchingFramesFound && !allTransactionsApplied) {
-            mFlinger->signalLayerUpdate();
-            return outDirtyRegion;
-        }
-
-        // This boolean is used to make sure that SurfaceFlinger's shadow copy
-        // of the buffer queue isn't modified when the buffer queue is returning
-        // BufferItem's that weren't actually queued. This can happen in shared
-        // buffer mode.
-        bool queuedBuffer = false;
-        status_t updateResult = mSurfaceFlingerConsumer->updateTexImage(&r,
-                mFlinger->mPrimaryDispSync, &mAutoRefresh, &queuedBuffer,
-                mLastFrameNumberReceived);
-        if (updateResult == BufferQueue::PRESENT_LATER) {
-            // Producer doesn't want buffer to be displayed yet.  Signal a
-            // layer update so we check again at the next opportunity.
-            mFlinger->signalLayerUpdate();
-            return outDirtyRegion;
-        } else if (updateResult == SurfaceFlingerConsumer::BUFFER_REJECTED) {
-            // If the buffer has been rejected, remove it from the shadow queue
-            // and return early
-            if (queuedBuffer) {
-                Mutex::Autolock lock(mQueueItemLock);
-                mQueueItems.removeAt(0);
-                android_atomic_dec(&mQueuedFrames);
-            }
-            return outDirtyRegion;
-        } else if (updateResult != NO_ERROR || mUpdateTexImageFailed) {
-            // This can occur if something goes wrong when trying to create the
-            // EGLImage for this buffer. If this happens, the buffer has already
-            // been released, so we need to clean up the queue and bug out
-            // early.
-            if (queuedBuffer) {
-                Mutex::Autolock lock(mQueueItemLock);
-                mQueueItems.clear();
-                android_atomic_and(0, &mQueuedFrames);
             }
 
-            // Once we have hit this state, the shadow queue may no longer
-            // correctly reflect the incoming BufferQueue's contents, so even if
-            // updateTexImage starts working, the only safe course of action is
-            // to continue to ignore updates.
-            mUpdateTexImageFailed = true;
+            // if the transparent region has changed (this test is
+            // conservative, but that's fine, worst case we're doing
+            // a bit of extra work), we latch the new one and we
+            // trigger a visible-region recompute.
+            if (!front.activeTransparentRegion.isTriviallyEqual(
+                    front.requestedTransparentRegion)) {
+                front.activeTransparentRegion = front.requestedTransparentRegion;
 
-            return outDirtyRegion;
-        }
+                // We also need to update the current state so that
+                // we don't end-up overwriting the drawing state with
+                // this stale current state during the next transaction
+                //
+                // NOTE: We don't need to hold the transaction lock here
+                // because State::active is only accessed from this thread.
+                current.activeTransparentRegion = front.activeTransparentRegion;
 
-        if (queuedBuffer) {
-            // Autolock scope
-            auto currentFrameNumber = mSurfaceFlingerConsumer->getFrameNumber();
-
-            Mutex::Autolock lock(mQueueItemLock);
-
-            // Remove any stale buffers that have been dropped during
-            // updateTexImage
-            while (mQueueItems[0].mFrameNumber != currentFrameNumber) {
-                mQueueItems.removeAt(0);
-                android_atomic_dec(&mQueuedFrames);
-            }
-
-            mQueueItems.removeAt(0);
-        }
-
-
-        // Decrement the queued-frames count.  Signal another event if we
-        // have more frames pending.
-        if ((queuedBuffer && android_atomic_dec(&mQueuedFrames) > 1)
-                || mAutoRefresh) {
-            mFlinger->signalLayerUpdate();
-        }
-
-        if (updateResult != NO_ERROR) {
-            // something happened!
-            recomputeVisibleRegions = true;
-            return outDirtyRegion;
-        }
-
-        // update the active buffer
-        mActiveBuffer = mSurfaceFlingerConsumer->getCurrentBuffer();
-        if (mActiveBuffer == NULL) {
-            // this can only happen if the very first buffer was rejected.
-            return outDirtyRegion;
-        }
-
-        mRefreshPending = true;
-        mFrameLatencyNeeded = true;
-        if (oldActiveBuffer == NULL) {
-             // the first time we receive a buffer, we need to trigger a
-             // geometry invalidation.
-            recomputeVisibleRegions = true;
-         }
-
-        Rect crop(mSurfaceFlingerConsumer->getCurrentCrop());
-        const uint32_t transform(mSurfaceFlingerConsumer->getCurrentTransform());
-        const uint32_t scalingMode(mSurfaceFlingerConsumer->getCurrentScalingMode());
-        if ((crop != mCurrentCrop) ||
-            (transform != mCurrentTransform) ||
-            (scalingMode != mCurrentScalingMode))
-        {
-            mCurrentCrop = crop;
-            mCurrentTransform = transform;
-            mCurrentScalingMode = scalingMode;
-            recomputeVisibleRegions = true;
-        }
-
-        if (oldActiveBuffer != NULL) {
-            uint32_t bufWidth  = mActiveBuffer->getWidth();
-            uint32_t bufHeight = mActiveBuffer->getHeight();
-            if (bufWidth != uint32_t(oldActiveBuffer->width) ||
-                bufHeight != uint32_t(oldActiveBuffer->height)) {
+                // recompute visible region
                 recomputeVisibleRegions = true;
             }
+
+            if (front.crop != front.requestedCrop) {
+                front.crop = front.requestedCrop;
+                current.crop = front.requestedCrop;
+                recomputeVisibleRegions = true;
+            }
+            freezePositionUpdates = false;
+
+            return false;
+        }
+    };
+
+    Reject r(mDrawingState, getCurrentState(), recomputeVisibleRegions,
+            getProducerStickyTransform() != 0, mName.string(),
+            mOverrideScalingMode, mFreezePositionUpdates);
+
+
+    // Check all of our local sync points to ensure that all transactions
+    // which need to have been applied prior to the frame which is about to
+    // be latched have signaled
+
+    auto headFrameNumber = getHeadFrameNumber();
+    bool matchingFramesFound = false;
+    bool allTransactionsApplied = true;
+    {
+        Mutex::Autolock lock(mLocalSyncPointMutex);
+        for (auto& point : mLocalSyncPoints) {
+            if (point->getFrameNumber() > headFrameNumber) {
+                break;
+            }
+
+            matchingFramesFound = true;
+
+            if (!point->frameIsAvailable()) {
+                // We haven't notified the remote layer that the frame for
+                // this point is available yet. Notify it now, and then
+                // abort this attempt to latch.
+                point->setFrameAvailable();
+                allTransactionsApplied = false;
+                break;
+            }
+
+            allTransactionsApplied &= point->transactionIsApplied();
+        }
+    }
+
+    if (matchingFramesFound && !allTransactionsApplied) {
+        mFlinger->signalLayerUpdate();
+        return outDirtyRegion;
+    }
+
+    // This boolean is used to make sure that SurfaceFlinger's shadow copy
+    // of the buffer queue isn't modified when the buffer queue is returning
+    // BufferItem's that weren't actually queued. This can happen in shared
+    // buffer mode.
+    bool queuedBuffer = false;
+    status_t updateResult = mSurfaceFlingerConsumer->updateTexImage(&r,
+            mFlinger->mPrimaryDispSync, &mAutoRefresh, &queuedBuffer,
+            mLastFrameNumberReceived);
+    if (updateResult == BufferQueue::PRESENT_LATER) {
+        // Producer doesn't want buffer to be displayed yet.  Signal a
+        // layer update so we check again at the next opportunity.
+        mFlinger->signalLayerUpdate();
+        return outDirtyRegion;
+    } else if (updateResult == SurfaceFlingerConsumer::BUFFER_REJECTED) {
+        // If the buffer has been rejected, remove it from the shadow queue
+        // and return early
+        if (queuedBuffer) {
+            Mutex::Autolock lock(mQueueItemLock);
+            mQueueItems.removeAt(0);
+            android_atomic_dec(&mQueuedFrames);
+        }
+        return outDirtyRegion;
+    } else if (updateResult != NO_ERROR || mUpdateTexImageFailed) {
+        // This can occur if something goes wrong when trying to create the
+        // EGLImage for this buffer. If this happens, the buffer has already
+        // been released, so we need to clean up the queue and bug out
+        // early.
+        if (queuedBuffer) {
+            Mutex::Autolock lock(mQueueItemLock);
+            mQueueItems.clear();
+            android_atomic_and(0, &mQueuedFrames);
         }
 
-        mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format);
-        if (oldOpacity != isOpaque(s)) {
+        // Once we have hit this state, the shadow queue may no longer
+        // correctly reflect the incoming BufferQueue's contents, so even if
+        // updateTexImage starts working, the only safe course of action is
+        // to continue to ignore updates.
+        mUpdateTexImageFailed = true;
+
+        return outDirtyRegion;
+    }
+
+    if (queuedBuffer) {
+        // Autolock scope
+        auto currentFrameNumber = mSurfaceFlingerConsumer->getFrameNumber();
+
+        Mutex::Autolock lock(mQueueItemLock);
+
+        // Remove any stale buffers that have been dropped during
+        // updateTexImage
+        while (mQueueItems[0].mFrameNumber != currentFrameNumber) {
+            mQueueItems.removeAt(0);
+            android_atomic_dec(&mQueuedFrames);
+        }
+
+        mQueueItems.removeAt(0);
+    }
+
+
+    // Decrement the queued-frames count.  Signal another event if we
+    // have more frames pending.
+    if ((queuedBuffer && android_atomic_dec(&mQueuedFrames) > 1)
+            || mAutoRefresh) {
+        mFlinger->signalLayerUpdate();
+    }
+
+    if (updateResult != NO_ERROR) {
+        // something happened!
+        recomputeVisibleRegions = true;
+        return outDirtyRegion;
+    }
+
+    // update the active buffer
+    mActiveBuffer = mSurfaceFlingerConsumer->getCurrentBuffer();
+    if (mActiveBuffer == NULL) {
+        // this can only happen if the very first buffer was rejected.
+        return outDirtyRegion;
+    }
+
+    mRefreshPending = true;
+    mFrameLatencyNeeded = true;
+    if (oldActiveBuffer == NULL) {
+         // the first time we receive a buffer, we need to trigger a
+         // geometry invalidation.
+        recomputeVisibleRegions = true;
+     }
+
+    Rect crop(mSurfaceFlingerConsumer->getCurrentCrop());
+    const uint32_t transform(mSurfaceFlingerConsumer->getCurrentTransform());
+    const uint32_t scalingMode(mSurfaceFlingerConsumer->getCurrentScalingMode());
+    if ((crop != mCurrentCrop) ||
+        (transform != mCurrentTransform) ||
+        (scalingMode != mCurrentScalingMode))
+    {
+        mCurrentCrop = crop;
+        mCurrentTransform = transform;
+        mCurrentScalingMode = scalingMode;
+        recomputeVisibleRegions = true;
+    }
+
+    if (oldActiveBuffer != NULL) {
+        uint32_t bufWidth  = mActiveBuffer->getWidth();
+        uint32_t bufHeight = mActiveBuffer->getHeight();
+        if (bufWidth != uint32_t(oldActiveBuffer->width) ||
+            bufHeight != uint32_t(oldActiveBuffer->height)) {
             recomputeVisibleRegions = true;
         }
+    }
 
-        mCurrentFrameNumber = mSurfaceFlingerConsumer->getFrameNumber();
+    mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format);
+    if (oldOpacity != isOpaque(s)) {
+        recomputeVisibleRegions = true;
+    }
 
-        // Remove any sync points corresponding to the buffer which was just
-        // latched
-        {
-            Mutex::Autolock lock(mLocalSyncPointMutex);
-            auto point = mLocalSyncPoints.begin();
-            while (point != mLocalSyncPoints.end()) {
-                if (!(*point)->frameIsAvailable() ||
-                        !(*point)->transactionIsApplied()) {
-                    // This sync point must have been added since we started
-                    // latching. Don't drop it yet.
-                    ++point;
-                    continue;
-                }
+    mCurrentFrameNumber = mSurfaceFlingerConsumer->getFrameNumber();
 
-                if ((*point)->getFrameNumber() <= mCurrentFrameNumber) {
-                    point = mLocalSyncPoints.erase(point);
-                } else {
-                    ++point;
-                }
+    // Remove any sync points corresponding to the buffer which was just
+    // latched
+    {
+        Mutex::Autolock lock(mLocalSyncPointMutex);
+        auto point = mLocalSyncPoints.begin();
+        while (point != mLocalSyncPoints.end()) {
+            if (!(*point)->frameIsAvailable() ||
+                    !(*point)->transactionIsApplied()) {
+                // This sync point must have been added since we started
+                // latching. Don't drop it yet.
+                ++point;
+                continue;
+            }
+
+            if ((*point)->getFrameNumber() <= mCurrentFrameNumber) {
+                point = mLocalSyncPoints.erase(point);
+            } else {
+                ++point;
             }
         }
-
-        // FIXME: postedRegion should be dirty & bounds
-        Region dirtyRegion(Rect(s.active.w, s.active.h));
-
-        // transform the dirty region to window-manager space
-        outDirtyRegion = (s.active.transform.transform(dirtyRegion));
     }
+
+    // FIXME: postedRegion should be dirty & bounds
+    Region dirtyRegion(Rect(s.active.w, s.active.h));
+
+    // transform the dirty region to window-manager space
+    outDirtyRegion = (s.active.transform.transform(dirtyRegion));
+
     return outDirtyRegion;
 }
 
@@ -2340,17 +2326,6 @@
 
 // ---------------------------------------------------------------------------
 
-Layer::LayerCleaner::LayerCleaner(const sp<SurfaceFlinger>& flinger,
-        const sp<Layer>& layer)
-    : mFlinger(flinger), mLayer(layer) {
-}
-
-Layer::LayerCleaner::~LayerCleaner() {
-    // destroy client resources
-    mFlinger->onLayerDestroyed(mLayer);
-}
-
-// ---------------------------------------------------------------------------
 }; // namespace android
 
 #if defined(__gl_h_)
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 24de87e..efb0fb8 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -180,11 +180,6 @@
     Rect computeBounds(const Region& activeTransparentRegion) const;
     Rect computeBounds() const;
 
-    class Handle;
-    sp<IBinder> getHandle();
-    sp<IGraphicBufferProducer> getProducer() const;
-    const String8& getName() const;
-
     int32_t getSequence() const { return sequence; }
 
     // -----------------------------------------------------------------------
@@ -427,9 +422,6 @@
 protected:
     // constant
     sp<SurfaceFlinger> mFlinger;
-
-    virtual void onFirstRef();
-
     /*
      * Trivial class, used to ensure that mFlinger->onLayerDestroyed(mLayer)
      * is called.
@@ -438,13 +430,24 @@
         sp<SurfaceFlinger> mFlinger;
         wp<Layer> mLayer;
     protected:
-        ~LayerCleaner();
+        ~LayerCleaner() {
+            // destroy client resources
+            mFlinger->onLayerDestroyed(mLayer);
+        }
     public:
-        LayerCleaner(const sp<SurfaceFlinger>& flinger, const sp<Layer>& layer);
+        LayerCleaner(const sp<SurfaceFlinger>& flinger,
+                const sp<Layer>& layer)
+            : mFlinger(flinger), mLayer(layer) {
+        }
     };
 
 
+    virtual void onFirstRef();
+
+
+
 private:
+    friend class SurfaceInterceptor;
     // Interface implementation for SurfaceFlingerConsumer::ContentsChangedListener
     virtual void onFrameAvailable(const BufferItem& item) override;
     virtual void onFrameReplaced(const BufferItem& item) override;
@@ -531,6 +534,25 @@
     // the Surface Controller) if set.
     uint32_t getEffectiveScalingMode() const;
 public:
+    /*
+     * The layer handle is just a BBinder object passed to the client
+     * (remote process) -- we don't keep any reference on our side such that
+     * the dtor is called when the remote side let go of its reference.
+     *
+     * LayerCleaner ensures that mFlinger->onLayerDestroyed() is called for
+     * this layer when the handle is destroyed.
+     */
+    class Handle : public BBinder, public LayerCleaner {
+        public:
+            Handle(const sp<SurfaceFlinger>& flinger, const sp<Layer>& layer)
+                : LayerCleaner(flinger, layer), owner(layer) {}
+
+            wp<Layer> owner;
+    };
+
+    sp<IBinder> getHandle();
+    sp<IGraphicBufferProducer> getProducer() const;
+    const String8& getName() const;
     void notifyAvailableFrames();
 private:
 
diff --git a/services/surfaceflinger/RenderEngine/GLES10RenderEngine.cpp b/services/surfaceflinger/RenderEngine/GLES10RenderEngine.cpp
deleted file mode 100644
index 579affb..0000000
--- a/services/surfaceflinger/RenderEngine/GLES10RenderEngine.cpp
+++ /dev/null
@@ -1,78 +0,0 @@
-/*
- * Copyright 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <GLES/gl.h>
-
-#include <cutils/compiler.h>
-
-#include "GLES10RenderEngine.h"
-
-// ---------------------------------------------------------------------------
-namespace android {
-// ---------------------------------------------------------------------------
-
-GLES10RenderEngine::~GLES10RenderEngine() {
-}
-
-void GLES10RenderEngine::setupLayerBlending(
-#ifdef USE_HWC2
-    bool premultipliedAlpha, bool opaque, float alpha) {
-#else
-    bool premultipliedAlpha, bool opaque, int alpha) {
-#endif
-    // OpenGL ES 1.0 doesn't support texture combiners.
-    // This path doesn't properly handle opaque layers that have non-opaque
-    // alpha values. The alpha channel will be copied into the framebuffer or
-    // screenshot, so if the framebuffer or screenshot is blended on top of
-    // something else,  whatever is below the window will incorrectly show
-    // through.
-#ifdef USE_HWC2
-    if (CC_UNLIKELY(alpha < 1.0f)) {
-        if (premultipliedAlpha) {
-            glColor4f(alpha, alpha, alpha, alpha);
-        } else {
-            glColor4f(1.0f, 1.0f, 1.0f, alpha);
-        }
-#else
-    if (CC_UNLIKELY(alpha < 0xFF)) {
-        GLfloat floatAlpha = alpha * (1.0f / 255.0f);
-        if (premultipliedAlpha) {
-            glColor4f(floatAlpha, floatAlpha, floatAlpha, floatAlpha);
-        } else {
-            glColor4f(1.0f, 1.0f, 1.0f, floatAlpha);
-        }
-#endif
-        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
-    } else {
-        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-    }
-
-#ifdef USE_HWC2
-    if (alpha < 1.0f || !opaque) {
-#else
-    if (alpha < 0xFF || !opaque) {
-#endif
-        glEnable(GL_BLEND);
-        glBlendFunc(premultipliedAlpha ? GL_ONE : GL_SRC_ALPHA,
-                    GL_ONE_MINUS_SRC_ALPHA);
-    } else {
-        glDisable(GL_BLEND);
-    }
-}
-
-// ---------------------------------------------------------------------------
-}; // namespace android
-// ---------------------------------------------------------------------------
diff --git a/services/surfaceflinger/RenderEngine/GLES10RenderEngine.h b/services/surfaceflinger/RenderEngine/GLES10RenderEngine.h
deleted file mode 100644
index 61abd6a..0000000
--- a/services/surfaceflinger/RenderEngine/GLES10RenderEngine.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * Copyright 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-
-#ifndef SF_GLES10RENDERENGINE_H_
-#define SF_GLES10RENDERENGINE_H_
-
-#include <stdint.h>
-#include <sys/types.h>
-
-#include "GLES11RenderEngine.h"
-
-// ---------------------------------------------------------------------------
-namespace android {
-// ---------------------------------------------------------------------------
-
-class GLES10RenderEngine : public GLES11RenderEngine {
-    virtual ~GLES10RenderEngine();
-protected:
-#ifdef USE_HWC2
-    virtual void setupLayerBlending(bool premultipliedAlpha, bool opaque,
-            float alpha) override;
-#else
-    virtual void setupLayerBlending(bool premultipliedAlpha, bool opaque, int alpha);
-#endif
-};
-
-// ---------------------------------------------------------------------------
-}; // namespace android
-// ---------------------------------------------------------------------------
-
-#endif /* SF_GLES10RENDERENGINE_H_ */
diff --git a/services/surfaceflinger/RenderEngine/GLES11RenderEngine.cpp b/services/surfaceflinger/RenderEngine/GLES11RenderEngine.cpp
deleted file mode 100644
index 847cdb3..0000000
--- a/services/surfaceflinger/RenderEngine/GLES11RenderEngine.cpp
+++ /dev/null
@@ -1,304 +0,0 @@
-/*
- * Copyright 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <GLES/gl.h>
-#include <GLES/glext.h>
-
-#include <ui/Rect.h>
-
-#include <utils/String8.h>
-#include <cutils/compiler.h>
-#include <gui/ISurfaceComposer.h>
-
-#include "GLES11RenderEngine.h"
-#include "Mesh.h"
-#include "Texture.h"
-
-// ---------------------------------------------------------------------------
-namespace android {
-// ---------------------------------------------------------------------------
-
-GLES11RenderEngine::GLES11RenderEngine() {
-
-    glGetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTextureSize);
-    glGetIntegerv(GL_MAX_VIEWPORT_DIMS, mMaxViewportDims);
-
-    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
-    glPixelStorei(GL_PACK_ALIGNMENT, 4);
-    glEnableClientState(GL_VERTEX_ARRAY);
-    glShadeModel(GL_FLAT);
-    glDisable(GL_DITHER);
-    glDisable(GL_CULL_FACE);
-
-    const uint16_t protTexData[] = { 0 };
-    glGenTextures(1, &mProtectedTexName);
-    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
-    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
-    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0,
-            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData);
-}
-
-GLES11RenderEngine::~GLES11RenderEngine() {
-}
-
-
-size_t GLES11RenderEngine::getMaxTextureSize() const {
-    return mMaxTextureSize;
-}
-
-size_t GLES11RenderEngine::getMaxViewportDims() const {
-    return
-        mMaxViewportDims[0] < mMaxViewportDims[1] ?
-            mMaxViewportDims[0] : mMaxViewportDims[1];
-}
-
-void GLES11RenderEngine::setViewportAndProjection(
-        size_t vpw, size_t vph, Rect sourceCrop, size_t hwh, bool yswap,
-        Transform::orientation_flags rotation) {
-    glViewport(0, 0, vpw, vph);
-    glMatrixMode(GL_PROJECTION);
-    glLoadIdentity();
-
-    size_t l = sourceCrop.left;
-    size_t r = sourceCrop.right;
-
-    // In GL, (0, 0) is the bottom-left corner, so flip y coordinates
-    size_t t = hwh - sourceCrop.top;
-    size_t b = hwh - sourceCrop.bottom;
-
-    if (yswap) {
-        glOrthof(l, r, t, b, 0, 1);
-    } else {
-        glOrthof(l, r, b, t, 0, 1);
-    }
-
-    switch (rotation) {
-        case Transform::ROT_0:
-            break;
-        case Transform::ROT_90:
-            glRotatef(90, 0, 0, 1);
-            break;
-        case Transform::ROT_180:
-            glRotatef(180, 0, 0, 1);
-            break;
-        case Transform::ROT_270:
-            glRotatef(270, 0, 0, 1);
-            break;
-        default:
-            break;
-    }
-
-    glMatrixMode(GL_MODELVIEW);
-}
-
-#ifdef USE_HWC2
-void GLES11RenderEngine::setupLayerBlending(bool premultipliedAlpha,
-        bool opaque, float alpha) {
-#else
-void GLES11RenderEngine::setupLayerBlending(
-    bool premultipliedAlpha, bool opaque, int alpha) {
-#endif
-    GLenum combineRGB;
-    GLenum combineAlpha;
-    GLenum src0Alpha;
-    GLfloat envColor[4];
-
-#ifdef USE_HWC2
-    if (CC_UNLIKELY(alpha < 1.0f)) {
-#else
-    if (CC_UNLIKELY(alpha < 0xFF)) {
-#endif
-        // Cv = premultiplied ? Cs*alpha : Cs
-        // Av = !opaque       ? As*alpha : As
-        combineRGB   = premultipliedAlpha ? GL_MODULATE : GL_REPLACE;
-        combineAlpha = !opaque            ? GL_MODULATE : GL_REPLACE;
-        src0Alpha    = GL_CONSTANT;
-#ifdef USE_HWC2
-        envColor[0]  = alpha;
-#else
-        envColor[0]  = alpha * (1.0f / 255.0f);
-#endif
-    } else {
-        // Cv = Cs
-        // Av = opaque ? 1.0 : As
-        combineRGB   = GL_REPLACE;
-        combineAlpha = GL_REPLACE;
-        src0Alpha    = opaque ? GL_CONSTANT : GL_TEXTURE;
-        envColor[0]  = 1.0f;
-    }
-
-    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
-    glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, combineRGB);
-    glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_RGB, GL_TEXTURE);
-    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
-    if (combineRGB == GL_MODULATE) {
-        glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_RGB, GL_CONSTANT);
-        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR);
-    }
-    glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, combineAlpha);
-    glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_ALPHA, src0Alpha);
-    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);
-    if (combineAlpha == GL_MODULATE) {
-        glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_ALPHA, GL_TEXTURE);
-        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA);
-    }
-    if (combineRGB == GL_MODULATE || src0Alpha == GL_CONSTANT) {
-        envColor[1] = envColor[0];
-        envColor[2] = envColor[0];
-        envColor[3] = envColor[0];
-        glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, envColor);
-    }
-
-#ifdef USE_HWC2
-    if (alpha < 1.0f || !opaque) {
-#else
-    if (alpha < 0xFF || !opaque) {
-#endif
-        glEnable(GL_BLEND);
-        glBlendFunc(premultipliedAlpha ? GL_ONE : GL_SRC_ALPHA,
-                    GL_ONE_MINUS_SRC_ALPHA);
-    } else {
-        glDisable(GL_BLEND);
-    }
-}
-
-#ifdef USE_HWC2
-void GLES11RenderEngine::setupDimLayerBlending(float alpha) {
-#else
-void GLES11RenderEngine::setupDimLayerBlending(int alpha) {
-#endif
-    glDisable(GL_TEXTURE_EXTERNAL_OES);
-    glDisable(GL_TEXTURE_2D);
-#ifdef USE_HWC2
-    if (alpha == 1.0f) {
-#else
-    if (alpha == 0xFF) {
-#endif
-        glDisable(GL_BLEND);
-    } else {
-        glEnable(GL_BLEND);
-        glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
-    }
-#ifdef USE_HWC2
-    glColor4f(0, 0, 0, alpha);
-#else
-    glColor4f(0, 0, 0, alpha/255.0f);
-#endif
-}
-
-void GLES11RenderEngine::setupLayerTexturing(const Texture& texture) {
-    GLuint target = texture.getTextureTarget();
-    glBindTexture(target, texture.getTextureName());
-    GLenum filter = GL_NEAREST;
-    if (texture.getFiltering()) {
-        filter = GL_LINEAR;
-    }
-    glTexParameterx(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-    glTexParameterx(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-    glTexParameterx(target, GL_TEXTURE_MAG_FILTER, filter);
-    glTexParameterx(target, GL_TEXTURE_MIN_FILTER, filter);
-    glMatrixMode(GL_TEXTURE);
-    glLoadMatrixf(texture.getMatrix().asArray());
-    glMatrixMode(GL_MODELVIEW);
-    glDisable(GL_TEXTURE_2D);
-    glEnable(GL_TEXTURE_EXTERNAL_OES);
-}
-
-void GLES11RenderEngine::setupLayerBlackedOut() {
-    glBindTexture(GL_TEXTURE_2D, mProtectedTexName);
-    glMatrixMode(GL_TEXTURE);
-    glLoadIdentity();
-    glMatrixMode(GL_MODELVIEW);
-    glDisable(GL_TEXTURE_EXTERNAL_OES);
-    glEnable(GL_TEXTURE_2D);
-}
-
-void GLES11RenderEngine::disableTexturing() {
-    glDisable(GL_TEXTURE_EXTERNAL_OES);
-    glDisable(GL_TEXTURE_2D);
-}
-
-void GLES11RenderEngine::disableBlending() {
-    glDisable(GL_BLEND);
-}
-
-void GLES11RenderEngine::bindImageAsFramebuffer(EGLImageKHR image,
-        uint32_t* texName, uint32_t* fbName, uint32_t* status) {
-    GLuint tname, name;
-    // turn our EGLImage into a texture
-    glGenTextures(1, &tname);
-    glBindTexture(GL_TEXTURE_2D, tname);
-    glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
-
-    // create a Framebuffer Object to render into
-    glGenFramebuffersOES(1, &name);
-    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
-    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
-            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
-
-    *status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
-    *texName = tname;
-    *fbName = name;
-}
-
-void GLES11RenderEngine::unbindFramebuffer(uint32_t texName, uint32_t fbName) {
-    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
-    glDeleteFramebuffersOES(1, &fbName);
-    glDeleteTextures(1, &texName);
-}
-
-void GLES11RenderEngine::setupFillWithColor(float r, float g, float b, float a) {
-    glColor4f(r, g, b, a);
-    glDisable(GL_TEXTURE_EXTERNAL_OES);
-    glDisable(GL_TEXTURE_2D);
-    glDisable(GL_BLEND);
-}
-
-void GLES11RenderEngine::drawMesh(const Mesh& mesh) {
-    if (mesh.getTexCoordsSize()) {
-        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
-        glTexCoordPointer(mesh.getTexCoordsSize(),
-                GL_FLOAT,
-                mesh.getByteStride(),
-                mesh.getTexCoords());
-    }
-
-    glVertexPointer(mesh.getVertexSize(),
-            GL_FLOAT,
-            mesh.getByteStride(),
-            mesh.getPositions());
-
-    glDrawArrays(mesh.getPrimitive(), 0, mesh.getVertexCount());
-
-    if (mesh.getTexCoordsSize()) {
-        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
-    }
-}
-
-void GLES11RenderEngine::dump(String8& result) {
-    RenderEngine::dump(result);
-}
-
-// ---------------------------------------------------------------------------
-}; // namespace android
-// ---------------------------------------------------------------------------
-
-#if defined(__gl2_h_)
-#error "don't include gl2/gl2.h in this file"
-#endif
diff --git a/services/surfaceflinger/RenderEngine/GLES11RenderEngine.h b/services/surfaceflinger/RenderEngine/GLES11RenderEngine.h
deleted file mode 100644
index 4cd968d..0000000
--- a/services/surfaceflinger/RenderEngine/GLES11RenderEngine.h
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * Copyright 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-
-#ifndef SF_GLES11RENDERENGINE_H_
-#define SF_GLES11RENDERENGINE_H_
-
-#include <stdint.h>
-#include <sys/types.h>
-
-#include <GLES/gl.h>
-#include <Transform.h>
-
-#include "RenderEngine.h"
-
-// ---------------------------------------------------------------------------
-namespace android {
-// ---------------------------------------------------------------------------
-
-class String8;
-class Mesh;
-class Texture;
-
-class GLES11RenderEngine : public RenderEngine {
-    GLuint mProtectedTexName;
-    GLint mMaxViewportDims[2];
-    GLint mMaxTextureSize;
-
-    virtual void bindImageAsFramebuffer(EGLImageKHR image,
-            uint32_t* texName, uint32_t* fbName, uint32_t* status);
-    virtual void unbindFramebuffer(uint32_t texName, uint32_t fbName);
-
-public:
-    GLES11RenderEngine();
-
-protected:
-    virtual ~GLES11RenderEngine();
-
-    virtual void dump(String8& result);
-    virtual void setViewportAndProjection(size_t vpw, size_t vph,
-            Rect sourceCrop, size_t hwh, bool yswap,
-            Transform::orientation_flags rotation);
-#ifdef USE_HWC2
-    virtual void setupLayerBlending(bool premultipliedAlpha, bool opaque,
-            float alpha) override;
-    virtual void setupDimLayerBlending(float alpha) override;
-#else
-    virtual void setupLayerBlending(bool premultipliedAlpha, bool opaque,
-            int alpha);
-    virtual void setupDimLayerBlending(int alpha);
-#endif
-    virtual void setupLayerTexturing(const Texture& texture);
-    virtual void setupLayerBlackedOut();
-    virtual void setupFillWithColor(float r, float g, float b, float a) ;
-    virtual void disableTexturing();
-    virtual void disableBlending();
-
-    virtual void drawMesh(const Mesh& mesh);
-
-    virtual size_t getMaxTextureSize() const;
-    virtual size_t getMaxViewportDims() const;
-};
-
-// ---------------------------------------------------------------------------
-}; // namespace android
-// ---------------------------------------------------------------------------
-
-#endif /* SF_GLES11RENDERENGINE_H_ */
diff --git a/services/surfaceflinger/RenderEngine/RenderEngine.cpp b/services/surfaceflinger/RenderEngine/RenderEngine.cpp
index d6a032f..2b82d0e 100644
--- a/services/surfaceflinger/RenderEngine/RenderEngine.cpp
+++ b/services/surfaceflinger/RenderEngine/RenderEngine.cpp
@@ -19,8 +19,6 @@
 #include <ui/Region.h>
 
 #include "RenderEngine.h"
-#include "GLES10RenderEngine.h"
-#include "GLES11RenderEngine.h"
 #include "GLES20RenderEngine.h"
 #include "GLExtensions.h"
 #include "Mesh.h"
@@ -122,10 +120,8 @@
     RenderEngine* engine = NULL;
     switch (version) {
     case GLES_VERSION_1_0:
-        engine = new GLES10RenderEngine();
-        break;
     case GLES_VERSION_1_1:
-        engine = new GLES11RenderEngine();
+        LOG_ALWAYS_FATAL("SurfaceFlinger requires OpenGL ES 2.0 minimum to run.");
         break;
     case GLES_VERSION_2_0:
     case GLES_VERSION_3_0:
@@ -317,7 +313,7 @@
     KeyedVector<Attribute, EGLint> mList;
     struct Attribute {
         Attribute() : v(0) {};
-        Attribute(EGLint v) : v(v) { }
+        explicit Attribute(EGLint v) : v(v) { }
         EGLint v;
         bool operator < (const Attribute& other) const {
             // this places EGL_NONE at the end
@@ -338,18 +334,18 @@
     public:
         void operator = (EGLint value) {
             if (attribute != EGL_NONE) {
-                v.mList.add(attribute, value);
+                v.mList.add(Attribute(attribute), value);
             }
         }
         operator EGLint () const { return v.mList[attribute]; }
     };
 public:
     EGLAttributeVector() {
-        mList.add(EGL_NONE, EGL_NONE);
+        mList.add(Attribute(EGL_NONE), EGL_NONE);
     }
     void remove(EGLint attribute) {
         if (attribute != EGL_NONE) {
-            mList.removeItem(attribute);
+            mList.removeItem(Attribute(attribute));
         }
     }
     Adder operator [] (EGLint attribute) {
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index c84739a..e5b57f5 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -21,6 +21,7 @@
 #include <sys/types.h>
 #include <errno.h>
 #include <math.h>
+#include <mutex>
 #include <dlfcn.h>
 #include <inttypes.h>
 #include <stdatomic.h>
@@ -162,6 +163,7 @@
         mLastTransactionTime(0),
         mBootFinished(false),
         mForceFullDamage(false),
+        mInterceptor(),
         mPrimaryDispSync("PrimaryDispSync"),
         mPrimaryHWVsyncEnabled(false),
         mHWVsyncAvailable(false),
@@ -248,7 +250,7 @@
              flinger->setTransactionFlags(eDisplayTransactionNeeded);
          }
      public:
-        DisplayToken(const sp<SurfaceFlinger>& flinger)
+        explicit DisplayToken(const sp<SurfaceFlinger>& flinger)
             : flinger(flinger) {
         }
     };
@@ -259,7 +261,7 @@
     DisplayDeviceState info(DisplayDevice::DISPLAY_VIRTUAL, secure);
     info.displayName = displayName;
     mCurrentState.displays.add(token, info);
-
+    mInterceptor.saveDisplayCreation(info);
     return token;
 }
 
@@ -277,7 +279,7 @@
         ALOGE("destroyDisplay called for non-virtual display");
         return;
     }
-
+    mInterceptor.saveDisplayDeletion(info.displayId);
     mCurrentState.displays.removeItemsAt(idx);
     setTransactionFlags(eDisplayTransactionNeeded);
 }
@@ -290,6 +292,7 @@
     // All non-virtual displays are currently considered secure.
     DisplayDeviceState info(type, true);
     mCurrentState.displays.add(mBuiltinDisplays[type], info);
+    mInterceptor.saveDisplayCreation(info);
 }
 
 sp<IBinder> SurfaceFlinger::getBuiltInDisplay(int32_t id) {
@@ -462,6 +465,30 @@
     bool mEnabled;
 };
 
+class InjectVSyncSource : public VSyncSource {
+public:
+    InjectVSyncSource() {}
+
+    virtual ~InjectVSyncSource() {}
+
+    virtual void setCallback(const sp<VSyncSource::Callback>& callback) {
+        std::lock_guard<std::mutex> lock(mCallbackMutex);
+        mCallback = callback;
+    }
+
+    virtual void onInjectSyncEvent(nsecs_t when) {
+        std::lock_guard<std::mutex> lock(mCallbackMutex);
+        mCallback->onVSyncEvent(when);
+    }
+
+    virtual void setVSyncEnabled(bool) {}
+    virtual void setPhaseOffset(nsecs_t) {}
+
+private:
+    std::mutex mCallbackMutex; // Protects the following
+    sp<VSyncSource::Callback> mCallback;
+};
+
 void SurfaceFlinger::init() {
     ALOGI(  "SurfaceFlinger's main thread ready to run. "
             "Initializing graphics H/W...");
@@ -476,10 +503,10 @@
         // start the EventThread
         sp<VSyncSource> vsyncSrc = new DispSyncSource(&mPrimaryDispSync,
                 vsyncPhaseOffsetNs, true, "app");
-        mEventThread = new EventThread(vsyncSrc, *this);
+        mEventThread = new EventThread(vsyncSrc, *this, false);
         sp<VSyncSource> sfVsyncSrc = new DispSyncSource(&mPrimaryDispSync,
                 sfVsyncPhaseOffsetNs, true, "sf");
-        mSFEventThread = new EventThread(sfVsyncSrc, *this);
+        mSFEventThread = new EventThread(sfVsyncSrc, *this, true);
         mEventQueue.setEventThread(mSFEventThread);
 
         // set SFEventThread to SCHED_FIFO to minimize jitter
@@ -859,6 +886,40 @@
     return NO_ERROR;
 }
 
+status_t SurfaceFlinger::enableVSyncInjections(bool enable) {
+    if (enable == mInjectVSyncs) {
+        return NO_ERROR;
+    }
+
+    if (enable) {
+        mInjectVSyncs = enable;
+        ALOGV("VSync Injections enabled");
+        if (mVSyncInjector.get() == nullptr) {
+            mVSyncInjector = new InjectVSyncSource();
+            mInjectorEventThread = new EventThread(mVSyncInjector, *this, false);
+        }
+        mEventQueue.setEventThread(mInjectorEventThread);
+    } else {
+        mInjectVSyncs = enable;
+        ALOGV("VSync Injections disabled");
+        mEventQueue.setEventThread(mSFEventThread);
+        mVSyncInjector.clear();
+    }
+    return NO_ERROR;
+}
+
+status_t SurfaceFlinger::injectVSync(nsecs_t when) {
+    if (!mInjectVSyncs) {
+        ALOGE("VSync Injections not enabled");
+        return BAD_VALUE;
+    }
+    if (mInjectVSyncs && mInjectorEventThread.get() != nullptr) {
+        ALOGV("Injecting VSync inside SurfaceFlinger");
+        mVSyncInjector->onInjectSyncEvent(when);
+    }
+    return NO_ERROR;
+}
+
 // ----------------------------------------------------------------------------
 
 sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
@@ -1414,13 +1475,7 @@
             mHwc->commit(hwcId);
         }
         displayDevice->onSwapBuffersCompleted();
-        if (displayId == 0) {
-            // Make the default display current because the VirtualDisplayDevice
-            // code cannot deal with dequeueBuffer() being called outside of the
-            // composition loop; however the code below can call glFlush() which
-            // is allowed to (and does in some case) call dequeueBuffer().
-            displayDevice->makeCurrent(mEGLDisplay, mEGLContext);
-        }
+        displayDevice->makeCurrent(mEGLDisplay, mEGLContext);
         for (auto& layer : displayDevice->getVisibleLayersSortedByZ()) {
             sp<Fence> releaseFence = Fence::NO_FENCE;
             if (layer->getCompositionType(hwcId) == HWC2::Composition::Client) {
@@ -2316,6 +2371,10 @@
     }
 
     if (transactionFlags) {
+        if (mInterceptor.isEnabled()) {
+            mInterceptor.saveTransaction(state, mCurrentState.displays, displays, flags);
+        }
+
         // this triggers the transaction
         setTransactionFlags(transactionFlags);
 
@@ -2476,7 +2535,6 @@
         uint32_t w, uint32_t h, PixelFormat format, uint32_t flags,
         sp<IBinder>* handle, sp<IGraphicBufferProducer>* gbp)
 {
-    //ALOGD("createLayer for (%d x %d), name=%s", w, h, name.string());
     if (int32_t(w|h) < 0) {
         ALOGE("createLayer() failed, w or h is negative (w=%d, h=%d)",
                 int(w), int(h));
@@ -2511,6 +2569,7 @@
     if (result != NO_ERROR) {
         return result;
     }
+    mInterceptor.saveSurfaceCreation(layer);
 
     setTransactionFlags(eTransactionNeeded);
     return result;
@@ -2558,6 +2617,7 @@
     status_t err = NO_ERROR;
     sp<Layer> l(client->getLayerUser(handle));
     if (l != NULL) {
+        mInterceptor.saveSurfaceDeletion(l);
         err = removeLayer(l);
         ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
                 "error removing layer=%p (%s)", l.get(), strerror(-err));
@@ -2601,7 +2661,7 @@
     class MessageScreenInitialized : public MessageBase {
         SurfaceFlinger* flinger;
     public:
-        MessageScreenInitialized(SurfaceFlinger* flinger) : flinger(flinger) { }
+        explicit MessageScreenInitialized(SurfaceFlinger* flinger) : flinger(flinger) { }
         virtual bool handler() {
             flinger->onInitializeDisplays();
             return true;
@@ -2629,6 +2689,16 @@
         return;
     }
 
+    if (mInterceptor.isEnabled()) {
+        Mutex::Autolock _l(mStateLock);
+        ssize_t idx = mCurrentState.displays.indexOfKey(hw->getDisplayToken());
+        if (idx < 0) {
+            ALOGW("Surface Interceptor SavePowerMode: invalid display token");
+            return;
+        }
+        mInterceptor.savePowerModeUpdate(mCurrentState.displays.valueAt(idx).displayId, mode);
+    }
+
     if (currentMode == HWC_POWER_MODE_OFF) {
         // Turn on the display
         getHwComposer().setPowerMode(type, mode);
@@ -3314,6 +3384,18 @@
                 mSFEventThread->setPhaseOffset(static_cast<nsecs_t>(n));
                 return NO_ERROR;
             }
+            case 1020: { // Layer updates interceptor
+                n = data.readInt32();
+                if (n) {
+                    ALOGV("Interceptor enabled");
+                    mInterceptor.enable(mDrawingState.layersSortedByZ, mDrawingState.displays);
+                }
+                else{
+                    ALOGV("Interceptor disabled");
+                    mInterceptor.disable();
+                }
+                return NO_ERROR;
+            }
             case 1021: { // Disable HWC virtual displays
                 n = data.readInt32();
                 mUseHwcVirtualDisplays = !n;
@@ -3415,7 +3497,7 @@
     }
 
 public:
-    GraphicProducerWrapper(const sp<IGraphicBufferProducer>& impl)
+    explicit GraphicProducerWrapper(const sp<IGraphicBufferProducer>& impl)
     :   impl(impl),
         looper(new Looper(true)),
         result(NO_ERROR),
@@ -3839,31 +3921,6 @@
     return l->sequence - r->sequence;
 }
 
-// ---------------------------------------------------------------------------
-
-SurfaceFlinger::DisplayDeviceState::DisplayDeviceState()
-    : type(DisplayDevice::DISPLAY_ID_INVALID),
-      layerStack(DisplayDevice::NO_LAYER_STACK),
-      orientation(0),
-      width(0),
-      height(0),
-      isSecure(false) {
-}
-
-SurfaceFlinger::DisplayDeviceState::DisplayDeviceState(
-    DisplayDevice::DisplayType type, bool isSecure)
-    : type(type),
-      layerStack(DisplayDevice::NO_LAYER_STACK),
-      orientation(0),
-      width(0),
-      height(0),
-      isSecure(isSecure) {
-    viewport.makeInvalid();
-    frame.makeInvalid();
-}
-
-// ---------------------------------------------------------------------------
-
 }; // namespace android
 
 
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index b98924b..6449e57 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -56,6 +56,7 @@
 #include "FenceTracker.h"
 #include "FrameTracker.h"
 #include "MessageQueue.h"
+#include "SurfaceInterceptor.h"
 
 #include "DisplayHardware/HWComposer.h"
 #include "Effects/Daltonizer.h"
@@ -76,6 +77,8 @@
 class Surface;
 class RenderEngine;
 class EventControlThread;
+class VSyncSource;
+class InjectVSyncSource;
 
 // ---------------------------------------------------------------------------
 
@@ -148,6 +151,7 @@
 private:
     friend class Client;
     friend class DisplayEventConnection;
+    friend class EventThread;
     friend class Layer;
     friend class MonitoredProducer;
 
@@ -171,23 +175,6 @@
         virtual int do_compare(const void* lhs, const void* rhs) const;
     };
 
-    struct DisplayDeviceState {
-        DisplayDeviceState();
-        DisplayDeviceState(DisplayDevice::DisplayType type, bool isSecure);
-        bool isValid() const { return type >= 0; }
-        bool isMainDisplay() const { return type == DisplayDevice::DISPLAY_PRIMARY; }
-        bool isVirtualDisplay() const { return type >= DisplayDevice::DISPLAY_VIRTUAL; }
-        DisplayDevice::DisplayType type;
-        sp<IGraphicBufferProducer> surface;
-        uint32_t layerStack;
-        Rect viewport;
-        Rect frame;
-        uint8_t orientation;
-        uint32_t width, height;
-        String8 displayName;
-        bool isSecure;
-    };
-
     struct State {
         LayerVector layersSortedByZ;
         DefaultKeyedVector< wp<IBinder>, DisplayDeviceState> displays;
@@ -234,6 +221,9 @@
     virtual status_t getAnimationFrameStats(FrameStats* outStats) const;
     virtual status_t getHdrCapabilities(const sp<IBinder>& display,
             HdrCapabilities* outCapabilities) const;
+    virtual status_t enableVSyncInjections(bool enable);
+    virtual status_t injectVSync(nsecs_t when);
+
 
     /* ------------------------------------------------------------------------
      * DeathRecipient interface
@@ -489,6 +479,8 @@
     bool mGpuToCpuSupported;
     sp<EventThread> mEventThread;
     sp<EventThread> mSFEventThread;
+    sp<EventThread> mInjectorEventThread;
+    sp<InjectVSyncSource> mVSyncInjector;
     sp<EventControlThread> mEventControlThread;
     EGLContext mEGLContext;
     EGLDisplay mEGLDisplay;
@@ -529,6 +521,7 @@
 #ifdef USE_HWC2
     bool mPropagateBackpressure = true;
 #endif
+    SurfaceInterceptor mInterceptor;
     bool mUseHwcVirtualDisplays = true;
 
     // these are thread safe
@@ -549,6 +542,8 @@
      * Feature prototyping
      */
 
+    bool mInjectVSyncs;
+
     Daltonizer mDaltonizer;
 #ifndef USE_HWC2
     bool mDaltonize;
diff --git a/services/surfaceflinger/SurfaceFlinger_hwc1.cpp b/services/surfaceflinger/SurfaceFlinger_hwc1.cpp
index b0f418c..3ae2c04 100644
--- a/services/surfaceflinger/SurfaceFlinger_hwc1.cpp
+++ b/services/surfaceflinger/SurfaceFlinger_hwc1.cpp
@@ -20,6 +20,7 @@
 #include <sys/types.h>
 #include <errno.h>
 #include <math.h>
+#include <mutex>
 #include <dlfcn.h>
 #include <inttypes.h>
 #include <stdatomic.h>
@@ -92,6 +93,19 @@
 
 EGLAPI const char* eglQueryStringImplementationANDROID(EGLDisplay dpy, EGLint name);
 
+// Workaround for b/30067360: /proc/self/environ inaccessible in SurfaceFlinger
+// => ASan fails to read ASAN_OPTIONS => alloc-dealloc-mismatch bug is not
+// suppressed and prevents the device from booting.
+#ifndef __has_feature
+#define __has_feature(x) 0
+#endif
+#if __has_feature(address_sanitizer)
+__attribute__((visibility("default")))
+extern "C" const char *__asan_default_options() {
+  return "alloc_dealloc_mismatch=0";
+}
+#endif
+
 namespace android {
 
 // This is the phase offset in nanoseconds of the software vsync event
@@ -150,6 +164,7 @@
         mLastTransactionTime(0),
         mBootFinished(false),
         mForceFullDamage(false),
+        mInterceptor(),
         mPrimaryDispSync("PrimaryDispSync"),
         mPrimaryHWVsyncEnabled(false),
         mHWVsyncAvailable(false),
@@ -233,7 +248,7 @@
              flinger->setTransactionFlags(eDisplayTransactionNeeded);
          }
      public:
-        DisplayToken(const sp<SurfaceFlinger>& flinger)
+        explicit DisplayToken(const sp<SurfaceFlinger>& flinger)
             : flinger(flinger) {
         }
     };
@@ -244,7 +259,7 @@
     DisplayDeviceState info(DisplayDevice::DISPLAY_VIRTUAL, secure);
     info.displayName = displayName;
     mCurrentState.displays.add(token, info);
-
+    mInterceptor.saveDisplayCreation(info);
     return token;
 }
 
@@ -262,7 +277,7 @@
         ALOGE("destroyDisplay called for non-virtual display");
         return;
     }
-
+    mInterceptor.saveDisplayDeletion(info.displayId);
     mCurrentState.displays.removeItemsAt(idx);
     setTransactionFlags(eDisplayTransactionNeeded);
 }
@@ -274,6 +289,7 @@
     // All non-virtual displays are currently considered secure.
     DisplayDeviceState info(type, true);
     mCurrentState.displays.add(mBuiltinDisplays[type], info);
+    mInterceptor.saveDisplayCreation(info);
 }
 
 sp<IBinder> SurfaceFlinger::getBuiltInDisplay(int32_t id) {
@@ -446,6 +462,30 @@
     bool mEnabled;
 };
 
+class InjectVSyncSource : public VSyncSource {
+public:
+    InjectVSyncSource() {}
+
+    virtual ~InjectVSyncSource() {}
+
+    virtual void setCallback(const sp<VSyncSource::Callback>& callback) {
+        std::lock_guard<std::mutex> lock(mCallbackMutex);
+        mCallback = callback;
+    }
+
+    virtual void onInjectSyncEvent(nsecs_t when) {
+        std::lock_guard<std::mutex> lock(mCallbackMutex);
+        mCallback->onVSyncEvent(when);
+    }
+
+    virtual void setVSyncEnabled(bool) {}
+    virtual void setPhaseOffset(nsecs_t) {}
+
+private:
+    std::mutex mCallbackMutex; // Protects the following
+    sp<VSyncSource::Callback> mCallback;
+};
+
 void SurfaceFlinger::init() {
     ALOGI(  "SurfaceFlinger's main thread ready to run. "
             "Initializing graphics H/W...");
@@ -459,10 +499,10 @@
     // start the EventThread
     sp<VSyncSource> vsyncSrc = new DispSyncSource(&mPrimaryDispSync,
             vsyncPhaseOffsetNs, true, "app");
-    mEventThread = new EventThread(vsyncSrc, *this);
+    mEventThread = new EventThread(vsyncSrc, *this, false);
     sp<VSyncSource> sfVsyncSrc = new DispSyncSource(&mPrimaryDispSync,
             sfVsyncPhaseOffsetNs, true, "sf");
-    mSFEventThread = new EventThread(sfVsyncSrc, *this);
+    mSFEventThread = new EventThread(sfVsyncSrc, *this, true);
     mEventQueue.setEventThread(mSFEventThread);
 
     // set SFEventThread to SCHED_FIFO to minimize jitter
@@ -809,6 +849,40 @@
     return NO_ERROR;
 }
 
+status_t SurfaceFlinger::enableVSyncInjections(bool enable) {
+    if (enable == mInjectVSyncs) {
+        return NO_ERROR;
+    }
+
+    if (enable) {
+        mInjectVSyncs = enable;
+        ALOGV("VSync Injections enabled");
+        if (mVSyncInjector.get() == nullptr) {
+            mVSyncInjector = new InjectVSyncSource();
+            mInjectorEventThread = new EventThread(mVSyncInjector, *this, false);
+        }
+        mEventQueue.setEventThread(mInjectorEventThread);
+    } else {
+        mInjectVSyncs = enable;
+        ALOGV("VSync Injections disabled");
+        mEventQueue.setEventThread(mSFEventThread);
+        mVSyncInjector.clear();
+    }
+    return NO_ERROR;
+}
+
+status_t SurfaceFlinger::injectVSync(nsecs_t when) {
+    if (!mInjectVSyncs) {
+        ALOGE("VSync Injections not enabled");
+        return BAD_VALUE;
+    }
+    if (mInjectVSyncs && mInjectorEventThread.get() != nullptr) {
+        ALOGV("Injecting VSync inside SurfaceFlinger");
+        mVSyncInjector->onInjectSyncEvent(when);
+    }
+    return NO_ERROR;
+}
+
 // ----------------------------------------------------------------------------
 
 sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection() {
@@ -2220,6 +2294,10 @@
     }
 
     if (transactionFlags) {
+        if (mInterceptor.isEnabled()) {
+            mInterceptor.saveTransaction(state, mCurrentState.displays, displays, flags);
+        }
+
         // this triggers the transaction
         setTransactionFlags(transactionFlags);
 
@@ -2380,7 +2458,6 @@
         uint32_t w, uint32_t h, PixelFormat format, uint32_t flags,
         sp<IBinder>* handle, sp<IGraphicBufferProducer>* gbp)
 {
-    //ALOGD("createLayer for (%d x %d), name=%s", w, h, name.string());
     if (int32_t(w|h) < 0) {
         ALOGE("createLayer() failed, w or h is negative (w=%d, h=%d)",
                 int(w), int(h));
@@ -2415,6 +2492,7 @@
     if (result != NO_ERROR) {
         return result;
     }
+    mInterceptor.saveSurfaceCreation(layer);
 
     setTransactionFlags(eTransactionNeeded);
     return result;
@@ -2462,6 +2540,7 @@
     status_t err = NO_ERROR;
     sp<Layer> l(client->getLayerUser(handle));
     if (l != NULL) {
+        mInterceptor.saveSurfaceDeletion(l);
         err = removeLayer(l);
         ALOGE_IF(err<0 && err != NAME_NOT_FOUND,
                 "error removing layer=%p (%s)", l.get(), strerror(-err));
@@ -2505,7 +2584,7 @@
     class MessageScreenInitialized : public MessageBase {
         SurfaceFlinger* flinger;
     public:
-        MessageScreenInitialized(SurfaceFlinger* flinger) : flinger(flinger) { }
+        explicit MessageScreenInitialized(SurfaceFlinger* flinger) : flinger(flinger) { }
         virtual bool handler() {
             flinger->onInitializeDisplays();
             return true;
@@ -2533,6 +2612,16 @@
         return;
     }
 
+    if (mInterceptor.isEnabled()) {
+        Mutex::Autolock _l(mStateLock);
+        ssize_t idx = mCurrentState.displays.indexOfKey(hw->getDisplayToken());
+        if (idx < 0) {
+            ALOGW("Surface Interceptor SavePowerMode: invalid display token");
+            return;
+        }
+        mInterceptor.savePowerModeUpdate(mCurrentState.displays.valueAt(idx).displayId, mode);
+    }
+
     if (currentMode == HWC_POWER_MODE_OFF) {
         // Turn on the display
         getHwComposer().setPowerMode(type, mode);
@@ -3195,6 +3284,18 @@
                 mSFEventThread->setPhaseOffset(static_cast<nsecs_t>(n));
                 return NO_ERROR;
             }
+            case 1020: { // Layer updates interceptor
+                n = data.readInt32();
+                if (n) {
+                    ALOGV("Interceptor enabled");
+                    mInterceptor.enable(mDrawingState.layersSortedByZ, mDrawingState.displays);
+                }
+                else{
+                    ALOGV("Interceptor disabled");
+                    mInterceptor.disable();
+                }
+                return NO_ERROR;
+            }
             case 1021: { // Disable HWC virtual displays
                 n = data.readInt32();
                 mUseHwcVirtualDisplays = !n;
@@ -3296,7 +3397,7 @@
     }
 
 public:
-    GraphicProducerWrapper(const sp<IGraphicBufferProducer>& impl)
+    explicit GraphicProducerWrapper(const sp<IGraphicBufferProducer>& impl)
     :   impl(impl),
         looper(new Looper(true)),
         result(NO_ERROR),
@@ -3714,31 +3815,6 @@
     return l->sequence - r->sequence;
 }
 
-// ---------------------------------------------------------------------------
-
-SurfaceFlinger::DisplayDeviceState::DisplayDeviceState()
-    : type(DisplayDevice::DISPLAY_ID_INVALID),
-      layerStack(DisplayDevice::NO_LAYER_STACK),
-      orientation(0),
-      width(0),
-      height(0),
-      isSecure(false) {
-}
-
-SurfaceFlinger::DisplayDeviceState::DisplayDeviceState(
-    DisplayDevice::DisplayType type, bool isSecure)
-    : type(type),
-      layerStack(DisplayDevice::NO_LAYER_STACK),
-      orientation(0),
-      width(0),
-      height(0),
-      isSecure(isSecure) {
-    viewport.makeInvalid();
-    frame.makeInvalid();
-}
-
-// ---------------------------------------------------------------------------
-
 }; // namespace android
 
 
diff --git a/services/surfaceflinger/SurfaceInterceptor.cpp b/services/surfaceflinger/SurfaceInterceptor.cpp
new file mode 100644
index 0000000..4ae3580
--- /dev/null
+++ b/services/surfaceflinger/SurfaceInterceptor.cpp
@@ -0,0 +1,575 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#undef LOG_TAG
+#define LOG_TAG "SurfaceInterceptor"
+#define ATRACE_TAG ATRACE_TAG_GRAPHICS
+
+#include "Layer.h"
+#include "SurfaceFlinger.h"
+#include "SurfaceInterceptor.h"
+#include <cutils/log.h>
+
+#include <utils/Trace.h>
+
+#include <fstream>
+
+namespace android {
+
+// ----------------------------------------------------------------------------
+
+void SurfaceInterceptor::enable(const SortedVector<sp<Layer>>& layers,
+        const DefaultKeyedVector< wp<IBinder>, DisplayDeviceState>& displays)
+{
+    if (mEnabled) {
+        return;
+    }
+    ATRACE_CALL();
+    mEnabled = true;
+    std::lock_guard<std::mutex> protoGuard(mTraceMutex);
+    saveExistingDisplaysLocked(displays);
+    saveExistingSurfacesLocked(layers);
+}
+
+void SurfaceInterceptor::disable() {
+    if (!mEnabled) {
+        return;
+    }
+    ATRACE_CALL();
+    std::lock_guard<std::mutex> protoGuard(mTraceMutex);
+    mEnabled = false;
+    status_t err(writeProtoFileLocked());
+    ALOGE_IF(err == PERMISSION_DENIED, "Could not save the proto file! Permission denied");
+    ALOGE_IF(err == NOT_ENOUGH_DATA, "Could not save the proto file! There are missing fields");
+    mTrace.Clear();
+}
+
+bool SurfaceInterceptor::isEnabled() {
+    return mEnabled;
+}
+
+void SurfaceInterceptor::saveExistingDisplaysLocked(
+        const DefaultKeyedVector< wp<IBinder>, DisplayDeviceState>& displays)
+{
+    // Caveat: The initial snapshot does not capture the power mode of the existing displays
+    ATRACE_CALL();
+    for (size_t i = 0 ; i < displays.size() ; i++) {
+        addDisplayCreationLocked(createTraceIncrementLocked(), displays[i]);
+        addInitialDisplayStateLocked(createTraceIncrementLocked(), displays[i]);
+    }
+}
+
+void SurfaceInterceptor::saveExistingSurfacesLocked(const SortedVector<sp<Layer>>& layers) {
+    ATRACE_CALL();
+    for (const auto& layer : layers) {
+        addSurfaceCreationLocked(createTraceIncrementLocked(), layer);
+        addInitialSurfaceStateLocked(createTraceIncrementLocked(), layer);
+    }
+}
+
+void SurfaceInterceptor::addInitialSurfaceStateLocked(Increment* increment,
+        const sp<const Layer>& layer)
+{
+    Transaction* transaction(increment->mutable_transaction());
+    transaction->set_synchronous(layer->mTransactionFlags & BnSurfaceComposer::eSynchronous);
+    transaction->set_animation(layer->mTransactionFlags & BnSurfaceComposer::eAnimation);
+
+    const int32_t layerId(getLayerId(layer));
+    addPositionLocked(transaction, layerId, layer->mCurrentState.active.transform.tx(),
+            layer->mCurrentState.active.transform.ty());
+    addDepthLocked(transaction, layerId, layer->mCurrentState.z);
+    addAlphaLocked(transaction, layerId, layer->mCurrentState.alpha);
+    addTransparentRegionLocked(transaction, layerId, layer->mCurrentState.activeTransparentRegion);
+    addLayerStackLocked(transaction, layerId, layer->mCurrentState.layerStack);
+    addCropLocked(transaction, layerId, layer->mCurrentState.crop);
+    if (layer->mCurrentState.handle != nullptr) {
+        addDeferTransactionLocked(transaction, layerId, layer->mCurrentState.handle,
+                layer->mCurrentState.frameNumber);
+    }
+    addFinalCropLocked(transaction, layerId, layer->mCurrentState.finalCrop);
+    addOverrideScalingModeLocked(transaction, layerId, layer->getEffectiveScalingMode());
+    addFlagsLocked(transaction, layerId, layer->mCurrentState.flags);
+}
+
+void SurfaceInterceptor::addInitialDisplayStateLocked(Increment* increment,
+        const DisplayDeviceState& display)
+{
+    Transaction* transaction(increment->mutable_transaction());
+    transaction->set_synchronous(false);
+    transaction->set_animation(false);
+
+    addDisplaySurfaceLocked(transaction, display.displayId, display.surface);
+    addDisplayLayerStackLocked(transaction, display.displayId, display.layerStack);
+    addDisplaySizeLocked(transaction, display.displayId, display.width, display.height);
+    addDisplayProjectionLocked(transaction, display.displayId, display.orientation,
+            display.viewport, display.frame);
+}
+
+status_t SurfaceInterceptor::writeProtoFileLocked() {
+    ATRACE_CALL();
+    std::ofstream output(mOutputFileName, std::ios::out | std::ios::trunc | std::ios::binary);
+    // SerializeToOstream returns false when it's missing required data or when it could not write
+    if (!mTrace.IsInitialized()) {
+        return NOT_ENOUGH_DATA;
+    }
+    if (!mTrace.SerializeToOstream(&output)) {
+        return PERMISSION_DENIED;
+    }
+    return NO_ERROR;
+}
+
+const sp<const Layer> SurfaceInterceptor::getLayer(const wp<const IBinder>& weakHandle) {
+    const sp<const IBinder>& handle(weakHandle.promote());
+    const auto layerHandle(static_cast<const Layer::Handle*>(handle.get()));
+    const sp<const Layer> layer(layerHandle->owner.promote());
+    // layer could be a nullptr at this point
+    return layer;
+}
+
+const std::string SurfaceInterceptor::getLayerName(const sp<const Layer>& layer) {
+    return layer->getName().string();
+}
+
+int32_t SurfaceInterceptor::getLayerId(const sp<const Layer>& layer) {
+    return layer->sequence;
+}
+
+Increment* SurfaceInterceptor::createTraceIncrementLocked() {
+    Increment* increment(mTrace.add_increment());
+    increment->set_time_stamp(systemTime());
+    return increment;
+}
+
+SurfaceChange* SurfaceInterceptor::createSurfaceChangeLocked(Transaction* transaction,
+        int32_t layerId)
+{
+    SurfaceChange* change(transaction->add_surface_change());
+    change->set_id(layerId);
+    return change;
+}
+
+DisplayChange* SurfaceInterceptor::createDisplayChangeLocked(Transaction* transaction,
+        int32_t displayId)
+{
+    DisplayChange* dispChange(transaction->add_display_change());
+    dispChange->set_id(displayId);
+    return dispChange;
+}
+
+void SurfaceInterceptor::setProtoRectLocked(Rectangle* protoRect, const Rect& rect) {
+    protoRect->set_left(rect.left);
+    protoRect->set_top(rect.top);
+    protoRect->set_right(rect.right);
+    protoRect->set_bottom(rect.bottom);
+}
+
+void SurfaceInterceptor::addPositionLocked(Transaction* transaction, int32_t layerId,
+        float x, float y)
+{
+    SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+    PositionChange* posChange(change->mutable_position());
+    posChange->set_x(x);
+    posChange->set_y(y);
+}
+
+void SurfaceInterceptor::addDepthLocked(Transaction* transaction, int32_t layerId,
+        uint32_t z)
+{
+    SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+    LayerChange* depthChange(change->mutable_layer());
+    depthChange->set_layer(z);
+}
+
+void SurfaceInterceptor::addSizeLocked(Transaction* transaction, int32_t layerId, uint32_t w,
+        uint32_t h)
+{
+    SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+    SizeChange* sizeChange(change->mutable_size());
+    sizeChange->set_w(w);
+    sizeChange->set_h(h);
+}
+
+void SurfaceInterceptor::addAlphaLocked(Transaction* transaction, int32_t layerId,
+        float alpha)
+{
+    SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+    AlphaChange* alphaChange(change->mutable_alpha());
+    alphaChange->set_alpha(alpha);
+}
+
+void SurfaceInterceptor::addMatrixLocked(Transaction* transaction, int32_t layerId,
+        const layer_state_t::matrix22_t& matrix)
+{
+    SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+    MatrixChange* matrixChange(change->mutable_matrix());
+    matrixChange->set_dsdx(matrix.dsdx);
+    matrixChange->set_dtdx(matrix.dtdx);
+    matrixChange->set_dsdy(matrix.dsdy);
+    matrixChange->set_dtdy(matrix.dtdy);
+}
+
+void SurfaceInterceptor::addTransparentRegionLocked(Transaction* transaction,
+        int32_t layerId, const Region& transRegion)
+{
+    SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+    TransparentRegionHintChange* transparentChange(change->mutable_transparent_region_hint());
+
+    for (const auto& rect : transRegion) {
+        Rectangle* protoRect(transparentChange->add_region());
+        setProtoRectLocked(protoRect, rect);
+    }
+}
+
+void SurfaceInterceptor::addFlagsLocked(Transaction* transaction, int32_t layerId,
+        uint8_t flags)
+{
+    // There can be multiple flags changed
+    if (flags & layer_state_t::eLayerHidden) {
+        SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+        HiddenFlagChange* flagChange(change->mutable_hidden_flag());
+        flagChange->set_hidden_flag(true);
+    }
+    if (flags & layer_state_t::eLayerOpaque) {
+        SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+        OpaqueFlagChange* flagChange(change->mutable_opaque_flag());
+        flagChange->set_opaque_flag(true);
+    }
+    if (flags & layer_state_t::eLayerSecure) {
+        SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+        SecureFlagChange* flagChange(change->mutable_secure_flag());
+        flagChange->set_secure_flag(true);
+    }
+}
+
+void SurfaceInterceptor::addLayerStackLocked(Transaction* transaction, int32_t layerId,
+        uint32_t layerStack)
+{
+    SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+    LayerStackChange* layerStackChange(change->mutable_layer_stack());
+    layerStackChange->set_layer_stack(layerStack);
+}
+
+void SurfaceInterceptor::addCropLocked(Transaction* transaction, int32_t layerId,
+        const Rect& rect)
+{
+    SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+    CropChange* cropChange(change->mutable_crop());
+    Rectangle* protoRect(cropChange->mutable_rectangle());
+    setProtoRectLocked(protoRect, rect);
+}
+
+void SurfaceInterceptor::addFinalCropLocked(Transaction* transaction, int32_t layerId,
+        const Rect& rect)
+{
+    SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+    FinalCropChange* finalCropChange(change->mutable_final_crop());
+    Rectangle* protoRect(finalCropChange->mutable_rectangle());
+    setProtoRectLocked(protoRect, rect);
+}
+
+void SurfaceInterceptor::addDeferTransactionLocked(Transaction* transaction, int32_t layerId,
+        const wp<const IBinder>& weakHandle, uint64_t frameNumber)
+{
+    SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+    const sp<const Layer> layer(getLayer(weakHandle));
+    if (layer == nullptr) {
+        ALOGE("An existing layer could not be retrieved with the handle"
+                " for the deferred transaction");
+        return;
+    }
+    DeferredTransactionChange* deferTransaction(change->mutable_deferred_transaction());
+    deferTransaction->set_layer_id(getLayerId(layer));
+    deferTransaction->set_frame_number(frameNumber);
+}
+
+void SurfaceInterceptor::addOverrideScalingModeLocked(Transaction* transaction,
+        int32_t layerId, int32_t overrideScalingMode)
+{
+    SurfaceChange* change(createSurfaceChangeLocked(transaction, layerId));
+    OverrideScalingModeChange* overrideChange(change->mutable_override_scaling_mode());
+    overrideChange->set_override_scaling_mode(overrideScalingMode);
+}
+
+void SurfaceInterceptor::addSurfaceChangesLocked(Transaction* transaction,
+        const layer_state_t& state)
+{
+    const sp<const Layer> layer(getLayer(state.surface));
+    if (layer == nullptr) {
+        ALOGE("An existing layer could not be retrieved with the surface "
+                "from the layer_state_t surface in the update transaction");
+        return;
+    }
+
+    const int32_t layerId(getLayerId(layer));
+
+    if (state.what & layer_state_t::ePositionChanged) {
+        addPositionLocked(transaction, layerId, state.x, state.y);
+    }
+    if (state.what & layer_state_t::eLayerChanged) {
+        addDepthLocked(transaction, layerId, state.z);
+    }
+    if (state.what & layer_state_t::eSizeChanged) {
+        addSizeLocked(transaction, layerId, state.w, state.h);
+    }
+    if (state.what & layer_state_t::eAlphaChanged) {
+        addAlphaLocked(transaction, layerId, state.alpha);
+    }
+    if (state.what & layer_state_t::eMatrixChanged) {
+        addMatrixLocked(transaction, layerId, state.matrix);
+    }
+    if (state.what & layer_state_t::eTransparentRegionChanged) {
+        addTransparentRegionLocked(transaction, layerId, state.transparentRegion);
+    }
+    if (state.what & layer_state_t::eFlagsChanged) {
+        addFlagsLocked(transaction, layerId, state.flags);
+    }
+    if (state.what & layer_state_t::eLayerStackChanged) {
+        addLayerStackLocked(transaction, layerId, state.layerStack);
+    }
+    if (state.what & layer_state_t::eCropChanged) {
+        addCropLocked(transaction, layerId, state.crop);
+    }
+    if (state.what & layer_state_t::eDeferTransaction) {
+        addDeferTransactionLocked(transaction, layerId, state.handle, state.frameNumber);
+    }
+    if (state.what & layer_state_t::eFinalCropChanged) {
+        addFinalCropLocked(transaction, layerId, state.finalCrop);
+    }
+    if (state.what & layer_state_t::eOverrideScalingModeChanged) {
+        addOverrideScalingModeLocked(transaction, layerId, state.overrideScalingMode);
+    }
+}
+
+void SurfaceInterceptor::addDisplayChangesLocked(Transaction* transaction,
+        const DisplayState& state, int32_t displayId)
+{
+    if (state.what & DisplayState::eSurfaceChanged) {
+        addDisplaySurfaceLocked(transaction, displayId, state.surface);
+    }
+    if (state.what & DisplayState::eLayerStackChanged) {
+        addDisplayLayerStackLocked(transaction, displayId, state.layerStack);
+    }
+    if (state.what & DisplayState::eDisplaySizeChanged) {
+        addDisplaySizeLocked(transaction, displayId, state.width, state.height);
+    }
+    if (state.what & DisplayState::eDisplayProjectionChanged) {
+        addDisplayProjectionLocked(transaction, displayId, state.orientation, state.viewport,
+                state.frame);
+    }
+}
+
+void SurfaceInterceptor::addTransactionLocked(Increment* increment,
+        const Vector<ComposerState>& stateUpdates,
+        const DefaultKeyedVector< wp<IBinder>, DisplayDeviceState>& displays,
+        const Vector<DisplayState>& changedDisplays, uint32_t transactionFlags)
+{
+    Transaction* transaction(increment->mutable_transaction());
+    transaction->set_synchronous(transactionFlags & BnSurfaceComposer::eSynchronous);
+    transaction->set_animation(transactionFlags & BnSurfaceComposer::eAnimation);
+    for (const auto& compState: stateUpdates) {
+        addSurfaceChangesLocked(transaction, compState.state);
+    }
+    for (const auto& disp: changedDisplays) {
+        ssize_t dpyIdx = displays.indexOfKey(disp.token);
+        if (dpyIdx >= 0) {
+            const DisplayDeviceState& dispState(displays.valueAt(dpyIdx));
+            addDisplayChangesLocked(transaction, disp, dispState.displayId);
+        }
+    }
+}
+
+void SurfaceInterceptor::addSurfaceCreationLocked(Increment* increment,
+        const sp<const Layer>& layer)
+{
+    SurfaceCreation* creation(increment->mutable_surface_creation());
+    creation->set_id(getLayerId(layer));
+    creation->set_name(getLayerName(layer));
+    creation->set_w(layer->mCurrentState.active.w);
+    creation->set_h(layer->mCurrentState.active.h);
+}
+
+void SurfaceInterceptor::addSurfaceDeletionLocked(Increment* increment,
+        const sp<const Layer>& layer)
+{
+    SurfaceDeletion* deletion(increment->mutable_surface_deletion());
+    deletion->set_id(getLayerId(layer));
+}
+
+void SurfaceInterceptor::addBufferUpdateLocked(Increment* increment, const sp<const Layer>& layer,
+        uint32_t width, uint32_t height, uint64_t frameNumber)
+{
+    BufferUpdate* update(increment->mutable_buffer_update());
+    update->set_id(getLayerId(layer));
+    update->set_w(width);
+    update->set_h(height);
+    update->set_frame_number(frameNumber);
+}
+
+void SurfaceInterceptor::addVSyncUpdateLocked(Increment* increment, nsecs_t timestamp) {
+    VSyncEvent* event(increment->mutable_vsync_event());
+    event->set_when(timestamp);
+}
+
+void SurfaceInterceptor::addDisplaySurfaceLocked(Transaction* transaction, int32_t displayId,
+        const sp<const IGraphicBufferProducer>& surface)
+{
+    if (surface == nullptr) {
+        return;
+    }
+    uint64_t bufferQueueId = 0;
+    status_t err(surface->getUniqueId(&bufferQueueId));
+    if (err == NO_ERROR) {
+        DisplayChange* dispChange(createDisplayChangeLocked(transaction, displayId));
+        DispSurfaceChange* surfaceChange(dispChange->mutable_surface());
+        surfaceChange->set_buffer_queue_id(bufferQueueId);
+        surfaceChange->set_buffer_queue_name(surface->getConsumerName().string());
+    }
+    else {
+        ALOGE("invalid graphic buffer producer received while tracing a display change (%s)",
+                strerror(-err));
+    }
+}
+
+void SurfaceInterceptor::addDisplayLayerStackLocked(Transaction* transaction,
+        int32_t displayId, uint32_t layerStack)
+{
+    DisplayChange* dispChange(createDisplayChangeLocked(transaction, displayId));
+    LayerStackChange* layerStackChange(dispChange->mutable_layer_stack());
+    layerStackChange->set_layer_stack(layerStack);
+}
+
+void SurfaceInterceptor::addDisplaySizeLocked(Transaction* transaction, int32_t displayId,
+        uint32_t w, uint32_t h)
+{
+    DisplayChange* dispChange(createDisplayChangeLocked(transaction, displayId));
+    SizeChange* sizeChange(dispChange->mutable_size());
+    sizeChange->set_w(w);
+    sizeChange->set_h(h);
+}
+
+void SurfaceInterceptor::addDisplayProjectionLocked(Transaction* transaction,
+        int32_t displayId, int32_t orientation, const Rect& viewport, const Rect& frame)
+{
+    DisplayChange* dispChange(createDisplayChangeLocked(transaction, displayId));
+    ProjectionChange* projectionChange(dispChange->mutable_projection());
+    projectionChange->set_orientation(orientation);
+    Rectangle* viewportRect(projectionChange->mutable_viewport());
+    setProtoRectLocked(viewportRect, viewport);
+    Rectangle* frameRect(projectionChange->mutable_frame());
+    setProtoRectLocked(frameRect, frame);
+}
+
+void SurfaceInterceptor::addDisplayCreationLocked(Increment* increment,
+        const DisplayDeviceState& info)
+{
+    DisplayCreation* creation(increment->mutable_display_creation());
+    creation->set_id(info.displayId);
+    creation->set_name(info.displayName);
+    creation->set_type(info.type);
+    creation->set_is_secure(info.isSecure);
+}
+
+void SurfaceInterceptor::addDisplayDeletionLocked(Increment* increment, int32_t displayId) {
+    DisplayDeletion* deletion(increment->mutable_display_deletion());
+    deletion->set_id(displayId);
+}
+
+void SurfaceInterceptor::addPowerModeUpdateLocked(Increment* increment, int32_t displayId,
+        int32_t mode)
+{
+    PowerModeUpdate* powerModeUpdate(increment->mutable_power_mode_update());
+    powerModeUpdate->set_id(displayId);
+    powerModeUpdate->set_mode(mode);
+}
+
+void SurfaceInterceptor::saveTransaction(const Vector<ComposerState>& stateUpdates,
+        const DefaultKeyedVector< wp<IBinder>, DisplayDeviceState>& displays,
+        const Vector<DisplayState>& changedDisplays, uint32_t flags)
+{
+    if (!mEnabled || (stateUpdates.size() <= 0 && changedDisplays.size() <= 0)) {
+        return;
+    }
+    ATRACE_CALL();
+    std::lock_guard<std::mutex> protoGuard(mTraceMutex);
+    addTransactionLocked(createTraceIncrementLocked(), stateUpdates, displays, changedDisplays,
+            flags);
+}
+
+void SurfaceInterceptor::saveSurfaceCreation(const sp<const Layer>& layer) {
+    if (!mEnabled || layer == nullptr) {
+        return;
+    }
+    ATRACE_CALL();
+    std::lock_guard<std::mutex> protoGuard(mTraceMutex);
+    addSurfaceCreationLocked(createTraceIncrementLocked(), layer);
+}
+
+void SurfaceInterceptor::saveSurfaceDeletion(const sp<const Layer>& layer) {
+    if (!mEnabled || layer == nullptr) {
+        return;
+    }
+    ATRACE_CALL();
+    std::lock_guard<std::mutex> protoGuard(mTraceMutex);
+    addSurfaceDeletionLocked(createTraceIncrementLocked(), layer);
+}
+
+void SurfaceInterceptor::saveBufferUpdate(const sp<const Layer>& layer, uint32_t width,
+        uint32_t height, uint64_t frameNumber)
+{
+    if (!mEnabled || layer == nullptr) {
+        return;
+    }
+    ATRACE_CALL();
+    std::lock_guard<std::mutex> protoGuard(mTraceMutex);
+    addBufferUpdateLocked(createTraceIncrementLocked(), layer, width, height, frameNumber);
+}
+
+void SurfaceInterceptor::saveVSyncEvent(nsecs_t timestamp) {
+    if (!mEnabled) {
+        return;
+    }
+    std::lock_guard<std::mutex> protoGuard(mTraceMutex);
+    addVSyncUpdateLocked(createTraceIncrementLocked(), timestamp);
+}
+
+void SurfaceInterceptor::saveDisplayCreation(const DisplayDeviceState& info) {
+    if (!mEnabled) {
+        return;
+    }
+    ATRACE_CALL();
+    std::lock_guard<std::mutex> protoGuard(mTraceMutex);
+    addDisplayCreationLocked(createTraceIncrementLocked(), info);
+}
+
+void SurfaceInterceptor::saveDisplayDeletion(int32_t displayId) {
+    if (!mEnabled) {
+        return;
+    }
+    ATRACE_CALL();
+    std::lock_guard<std::mutex> protoGuard(mTraceMutex);
+    addDisplayDeletionLocked(createTraceIncrementLocked(), displayId);
+}
+
+void SurfaceInterceptor::savePowerModeUpdate(int32_t displayId, int32_t mode) {
+    if (!mEnabled) {
+        return;
+    }
+    ATRACE_CALL();
+    std::lock_guard<std::mutex> protoGuard(mTraceMutex);
+    addPowerModeUpdateLocked(createTraceIncrementLocked(), displayId, mode);
+}
+
+
+} // namespace android
diff --git a/services/surfaceflinger/SurfaceInterceptor.h b/services/surfaceflinger/SurfaceInterceptor.h
new file mode 100644
index 0000000..4695138
--- /dev/null
+++ b/services/surfaceflinger/SurfaceInterceptor.h
@@ -0,0 +1,133 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_SURFACEINTERCEPTOR_H
+#define ANDROID_SURFACEINTERCEPTOR_H
+
+#include <frameworks/native/cmds/surfacereplayer/proto/src/trace.pb.h>
+
+#include <mutex>
+
+namespace android {
+
+class BufferItem;
+class Layer;
+struct DisplayState;
+struct layer_state_t;
+
+constexpr auto DEFAULT_FILENAME = "/data/SurfaceTrace.dat";
+
+/*
+ * SurfaceInterceptor intercepts and stores incoming streams of window
+ * properties on SurfaceFlinger.
+ */
+class SurfaceInterceptor {
+public:
+    // Both vectors are used to capture the current state of SF as the initial snapshot in the trace
+    void enable(const SortedVector<sp<Layer>>& layers,
+            const DefaultKeyedVector< wp<IBinder>, DisplayDeviceState>& displays);
+    void disable();
+    bool isEnabled();
+
+    // Intercept display and surface transactions
+    void saveTransaction(const Vector<ComposerState>& stateUpdates,
+            const DefaultKeyedVector< wp<IBinder>, DisplayDeviceState>& displays,
+            const Vector<DisplayState>& changedDisplays, uint32_t flags);
+
+    // Intercept surface data
+    void saveSurfaceCreation(const sp<const Layer>& layer);
+    void saveSurfaceDeletion(const sp<const Layer>& layer);
+    void saveBufferUpdate(const sp<const Layer>& layer, uint32_t width, uint32_t height,
+            uint64_t frameNumber);
+
+    // Intercept display data
+    void saveDisplayCreation(const DisplayDeviceState& info);
+    void saveDisplayDeletion(int32_t displayId);
+    void savePowerModeUpdate(int32_t displayId, int32_t mode);
+    void saveVSyncEvent(nsecs_t timestamp);
+
+private:
+    // The creation increments of Surfaces and Displays do not contain enough information to capture
+    // the initial state of each object, so a transaction with all of the missing properties is
+    // performed at the initial snapshot for each display and surface.
+    void saveExistingDisplaysLocked(
+            const DefaultKeyedVector< wp<IBinder>, DisplayDeviceState>& displays);
+    void saveExistingSurfacesLocked(const SortedVector<sp<Layer>>& layers);
+    void addInitialSurfaceStateLocked(Increment* increment, const sp<const Layer>& layer);
+    void addInitialDisplayStateLocked(Increment* increment, const DisplayDeviceState& display);
+
+    status_t writeProtoFileLocked();
+    const sp<const Layer> getLayer(const wp<const IBinder>& weakHandle);
+    const std::string getLayerName(const sp<const Layer>& layer);
+    int32_t getLayerId(const sp<const Layer>& layer);
+
+    Increment* createTraceIncrementLocked();
+    void addSurfaceCreationLocked(Increment* increment, const sp<const Layer>& layer);
+    void addSurfaceDeletionLocked(Increment* increment, const sp<const Layer>& layer);
+    void addBufferUpdateLocked(Increment* increment, const sp<const Layer>& layer, uint32_t width,
+            uint32_t height, uint64_t frameNumber);
+    void addVSyncUpdateLocked(Increment* increment, nsecs_t timestamp);
+    void addDisplayCreationLocked(Increment* increment, const DisplayDeviceState& info);
+    void addDisplayDeletionLocked(Increment* increment, int32_t displayId);
+    void addPowerModeUpdateLocked(Increment* increment, int32_t displayId, int32_t mode);
+
+    // Add surface transactions to the trace
+    SurfaceChange* createSurfaceChangeLocked(Transaction* transaction, int32_t layerId);
+    void setProtoRectLocked(Rectangle* protoRect, const Rect& rect);
+    void addPositionLocked(Transaction* transaction, int32_t layerId, float x, float y);
+    void addDepthLocked(Transaction* transaction, int32_t layerId, uint32_t z);
+    void addSizeLocked(Transaction* transaction, int32_t layerId, uint32_t w, uint32_t h);
+    void addAlphaLocked(Transaction* transaction, int32_t layerId, float alpha);
+    void addMatrixLocked(Transaction* transaction, int32_t layerId,
+            const layer_state_t::matrix22_t& matrix);
+    void addTransparentRegionLocked(Transaction* transaction, int32_t layerId,
+            const Region& transRegion);
+    void addFlagsLocked(Transaction* transaction, int32_t layerId, uint8_t flags);
+    void addLayerStackLocked(Transaction* transaction, int32_t layerId, uint32_t layerStack);
+    void addCropLocked(Transaction* transaction, int32_t layerId, const Rect& rect);
+    void addDeferTransactionLocked(Transaction* transaction, int32_t layerId,
+            const wp<const IBinder>& weakHandle, uint64_t frameNumber);
+    void addFinalCropLocked(Transaction* transaction, int32_t layerId, const Rect& rect);
+    void addOverrideScalingModeLocked(Transaction* transaction, int32_t layerId,
+            int32_t overrideScalingMode);
+    void addSurfaceChangesLocked(Transaction* transaction, const layer_state_t& state);
+    void addTransactionLocked(Increment* increment, const Vector<ComposerState>& stateUpdates,
+            const DefaultKeyedVector< wp<IBinder>, DisplayDeviceState>& displays,
+            const Vector<DisplayState>& changedDisplays, uint32_t transactionFlags);
+
+    // Add display transactions to the trace
+    DisplayChange* createDisplayChangeLocked(Transaction* transaction, int32_t displayId);
+    void addDisplaySurfaceLocked(Transaction* transaction, int32_t displayId,
+            const sp<const IGraphicBufferProducer>& surface);
+    void addDisplayLayerStackLocked(Transaction* transaction, int32_t displayId,
+            uint32_t layerStack);
+    void addDisplaySizeLocked(Transaction* transaction, int32_t displayId, uint32_t w,
+            uint32_t h);
+    void addDisplayProjectionLocked(Transaction* transaction, int32_t displayId,
+            int32_t orientation, const Rect& viewport, const Rect& frame);
+    void addDisplayChangesLocked(Transaction* transaction,
+            const DisplayState& state, int32_t displayId);
+
+
+    bool mEnabled {false};
+    std::string mOutputFileName {DEFAULT_FILENAME};
+    std::mutex mTraceMutex {};
+    Trace mTrace {};
+};
+
+}
+
+#endif // ANDROID_SURFACEINTERCEPTOR_H
diff --git a/services/surfaceflinger/tests/Android.mk b/services/surfaceflinger/tests/Android.mk
index 979062e..4f1a8e6 100644
--- a/services/surfaceflinger/tests/Android.mk
+++ b/services/surfaceflinger/tests/Android.mk
@@ -9,15 +9,21 @@
 
 LOCAL_SRC_FILES := \
     Transaction_test.cpp \
+    SurfaceInterceptor_test.cpp
 
 LOCAL_SHARED_LIBRARIES := \
-	libEGL \
-	libGLESv2 \
-	libbinder \
-	libcutils \
-	libgui \
-	libui \
-	libutils \
+    libEGL \
+    libGLESv2 \
+    libbinder \
+    libcutils \
+    libgui \
+    libprotobuf-cpp-full \
+    libui \
+    libutils \
+
+LOCAL_STATIC_LIBRARIES := libtrace_proto
+
+LOCAL_CFLAGS += -Wall -Werror -Wunused -Wunreachable-code
 
 # Build the binary to $(TARGET_OUT_DATA_NATIVE_TESTS)/$(LOCAL_MODULE)
 # to integrate with auto-test framework.
diff --git a/services/surfaceflinger/tests/SurfaceInterceptor_test.cpp b/services/surfaceflinger/tests/SurfaceInterceptor_test.cpp
new file mode 100644
index 0000000..1a3f89f
--- /dev/null
+++ b/services/surfaceflinger/tests/SurfaceInterceptor_test.cpp
@@ -0,0 +1,856 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <frameworks/native/cmds/surfacereplayer/proto/src/trace.pb.h>
+
+#include <gtest/gtest.h>
+
+#include <android/native_window.h>
+
+#include <gui/ISurfaceComposer.h>
+#include <gui/Surface.h>
+#include <gui/SurfaceComposerClient.h>
+#include <private/gui/ComposerService.h>
+#include <private/gui/LayerState.h>
+#include <ui/DisplayInfo.h>
+
+#include <fstream>
+#include <random>
+#include <thread>
+
+namespace android {
+
+constexpr int32_t SCALING_UPDATE = 1;
+constexpr uint32_t BUFFER_UPDATES = 18;
+constexpr uint32_t LAYER_UPDATE = INT_MAX - 2;
+constexpr uint32_t SIZE_UPDATE = 134;
+constexpr uint32_t STACK_UPDATE = 1;
+constexpr uint64_t DEFERRED_UPDATE = 13;
+constexpr float ALPHA_UPDATE = 0.29f;
+constexpr float POSITION_UPDATE = 121;
+const Rect CROP_UPDATE(16, 16, 32, 32);
+
+const String8 DISPLAY_NAME("SurfaceInterceptor Display Test");
+constexpr auto LAYER_NAME = "Layer Create and Delete Test";
+
+constexpr auto DEFAULT_FILENAME = "/data/SurfaceTrace.dat";
+
+// Fill an RGBA_8888 formatted surface with a single color.
+static void fillSurfaceRGBA8(const sp<SurfaceControl>& sc, uint8_t r, uint8_t g, uint8_t b) {
+    ANativeWindow_Buffer outBuffer;
+    sp<Surface> s = sc->getSurface();
+    ASSERT_TRUE(s != nullptr);
+    ASSERT_EQ(NO_ERROR, s->lock(&outBuffer, nullptr));
+    uint8_t* img = reinterpret_cast<uint8_t*>(outBuffer.bits);
+    for (int y = 0; y < outBuffer.height; y++) {
+        for (int x = 0; x < outBuffer.width; x++) {
+            uint8_t* pixel = img + (4 * (y*outBuffer.stride + x));
+            pixel[0] = r;
+            pixel[1] = g;
+            pixel[2] = b;
+            pixel[3] = 255;
+        }
+    }
+    ASSERT_EQ(NO_ERROR, s->unlockAndPost());
+}
+
+static status_t readProtoFile(Trace* trace) {
+    std::ifstream input(DEFAULT_FILENAME, std::ios::in | std::ios::binary);
+    if (input && !trace->ParseFromIstream(&input)) {
+        return PERMISSION_DENIED;
+    }
+    return NO_ERROR;
+}
+
+static void enableInterceptor() {
+    system("service call SurfaceFlinger 1020 i32 1 > /dev/null");
+}
+
+static void disableInterceptor() {
+    system("service call SurfaceFlinger 1020 i32 0 > /dev/null");
+}
+
+int32_t getSurfaceId(const std::string& surfaceName) {
+    enableInterceptor();
+    disableInterceptor();
+    Trace capturedTrace;
+    readProtoFile(&capturedTrace);
+    int32_t layerId = 0;
+    for (const auto& increment : *capturedTrace.mutable_increment()) {
+        if (increment.increment_case() == increment.kSurfaceCreation) {
+            if (increment.surface_creation().name() == surfaceName) {
+                layerId = increment.surface_creation().id();
+                break;
+            }
+        }
+    }
+    return layerId;
+}
+
+int32_t getDisplayId(const std::string& displayName) {
+    enableInterceptor();
+    disableInterceptor();
+    Trace capturedTrace;
+    readProtoFile(&capturedTrace);
+    int32_t displayId = 0;
+    for (const auto& increment : *capturedTrace.mutable_increment()) {
+        if (increment.increment_case() == increment.kDisplayCreation) {
+            if (increment.display_creation().name() == displayName) {
+                displayId = increment.display_creation().id();
+                break;
+            }
+        }
+    }
+    return displayId;
+}
+
+class SurfaceInterceptorTest : public ::testing::Test {
+protected:
+    virtual void SetUp() {
+        // Allow SurfaceInterceptor write to /data
+        system("setenforce 0");
+
+        mComposerClient = new SurfaceComposerClient;
+        ASSERT_EQ(NO_ERROR, mComposerClient->initCheck());
+
+        sp<IBinder> display(SurfaceComposerClient::getBuiltInDisplay(
+                ISurfaceComposer::eDisplayIdMain));
+        DisplayInfo info;
+        SurfaceComposerClient::getDisplayInfo(display, &info);
+        ssize_t displayWidth = info.w;
+        ssize_t displayHeight = info.h;
+
+        // Background surface
+        mBGSurfaceControl = mComposerClient->createSurface(
+                String8("BG Interceptor Test Surface"), displayWidth, displayHeight,
+                PIXEL_FORMAT_RGBA_8888, 0);
+        ASSERT_TRUE(mBGSurfaceControl != NULL);
+        ASSERT_TRUE(mBGSurfaceControl->isValid());
+        mBGLayerId = getSurfaceId("BG Interceptor Test Surface");
+
+        SurfaceComposerClient::openGlobalTransaction();
+        mComposerClient->setDisplayLayerStack(display, 0);
+        ASSERT_EQ(NO_ERROR, mBGSurfaceControl->setLayer(INT_MAX-3));
+        ASSERT_EQ(NO_ERROR, mBGSurfaceControl->show());
+        SurfaceComposerClient::closeGlobalTransaction(true);
+    }
+
+    virtual void TearDown() {
+        mComposerClient->dispose();
+        mBGSurfaceControl.clear();
+        mComposerClient.clear();
+    }
+
+    sp<SurfaceComposerClient> mComposerClient;
+    sp<SurfaceControl> mBGSurfaceControl;
+    int32_t mBGLayerId;
+    // Used to verify creation and destruction of surfaces and displays
+    int32_t mTargetId;
+
+public:
+    void captureTest(void (SurfaceInterceptorTest::* action)(void),
+            bool (SurfaceInterceptorTest::* verification)(Trace *));
+    void captureTest(void (SurfaceInterceptorTest::* action)(void),
+            SurfaceChange::SurfaceChangeCase changeCase);
+    void captureTest(void (SurfaceInterceptorTest::* action)(void),
+            Increment::IncrementCase incrementCase);
+    void runInTransaction(void (SurfaceInterceptorTest::* action)(void), bool intercepted = false);
+
+    // Verification of changes to a surface
+    bool positionUpdateFound(const SurfaceChange& change, bool foundPosition);
+    bool sizeUpdateFound(const SurfaceChange& change, bool foundSize);
+    bool alphaUpdateFound(const SurfaceChange& change, bool foundAlpha);
+    bool layerUpdateFound(const SurfaceChange& change, bool foundLayer);
+    bool cropUpdateFound(const SurfaceChange& change, bool foundCrop);
+    bool finalCropUpdateFound(const SurfaceChange& change, bool foundFinalCrop);
+    bool matrixUpdateFound(const SurfaceChange& change, bool foundMatrix);
+    bool scalingModeUpdateFound(const SurfaceChange& change, bool foundScalingMode);
+    bool transparentRegionHintUpdateFound(const SurfaceChange& change, bool foundTransparentRegion);
+    bool layerStackUpdateFound(const SurfaceChange& change, bool foundLayerStack);
+    bool hiddenFlagUpdateFound(const SurfaceChange& change, bool foundHiddenFlag);
+    bool opaqueFlagUpdateFound(const SurfaceChange& change, bool foundOpaqueFlag);
+    bool secureFlagUpdateFound(const SurfaceChange& change, bool foundSecureFlag);
+    bool deferredTransactionUpdateFound(const SurfaceChange& change, bool foundDeferred);
+    bool surfaceUpdateFound(Trace* trace, SurfaceChange::SurfaceChangeCase changeCase);
+    void assertAllUpdatesFound(Trace* trace);
+
+    // Verification of creation and deletion of a surface
+    bool surfaceCreationFound(const Increment& increment, bool foundSurface);
+    bool surfaceDeletionFound(const Increment& increment, bool foundSurface);
+    bool displayCreationFound(const Increment& increment, bool foundDisplay);
+    bool displayDeletionFound(const Increment& increment, bool foundDisplay);
+    bool singleIncrementFound(Trace* trace, Increment::IncrementCase incrementCase);
+
+    // Verification of buffer updates
+    bool bufferUpdatesFound(Trace* trace);
+
+    // Perform each of the possible changes to a surface
+    void positionUpdate();
+    void sizeUpdate();
+    void alphaUpdate();
+    void layerUpdate();
+    void cropUpdate();
+    void finalCropUpdate();
+    void matrixUpdate();
+    void overrideScalingModeUpdate();
+    void transparentRegionHintUpdate();
+    void layerStackUpdate();
+    void hiddenFlagUpdate();
+    void opaqueFlagUpdate();
+    void secureFlagUpdate();
+    void deferredTransactionUpdate();
+    void runAllUpdates();
+    void surfaceCreation();
+    void nBufferUpdates();
+    void displayCreation();
+    void displayDeletion();
+};
+
+void SurfaceInterceptorTest::captureTest(void (SurfaceInterceptorTest::* action)(void),
+        bool (SurfaceInterceptorTest::* verification)(Trace *))
+{
+    runInTransaction(action, true);
+    Trace capturedTrace;
+    ASSERT_EQ(NO_ERROR, readProtoFile(&capturedTrace));
+    ASSERT_TRUE((this->*verification)(&capturedTrace));
+}
+
+void SurfaceInterceptorTest::captureTest(void (SurfaceInterceptorTest::* action)(void),
+        Increment::IncrementCase incrementCase)
+{
+    runInTransaction(action, true);
+    Trace capturedTrace;
+    ASSERT_EQ(NO_ERROR, readProtoFile(&capturedTrace));
+    ASSERT_TRUE(singleIncrementFound(&capturedTrace, incrementCase));
+}
+
+void SurfaceInterceptorTest::captureTest(void (SurfaceInterceptorTest::* action)(void),
+        SurfaceChange::SurfaceChangeCase changeCase)
+{
+    runInTransaction(action, true);
+    Trace capturedTrace;
+    ASSERT_EQ(NO_ERROR, readProtoFile(&capturedTrace));
+    ASSERT_TRUE(surfaceUpdateFound(&capturedTrace, changeCase));
+}
+
+void SurfaceInterceptorTest::runInTransaction(void (SurfaceInterceptorTest::* action)(void),
+        bool intercepted)
+{
+    if (intercepted) {
+        enableInterceptor();
+    }
+    SurfaceComposerClient::openGlobalTransaction();
+    (this->*action)();
+    SurfaceComposerClient::closeGlobalTransaction(true);
+    if (intercepted) {
+        disableInterceptor();
+    }
+}
+
+void SurfaceInterceptorTest::positionUpdate() {
+    mBGSurfaceControl->setPosition(POSITION_UPDATE, POSITION_UPDATE);
+}
+
+void SurfaceInterceptorTest::sizeUpdate() {
+    mBGSurfaceControl->setSize(SIZE_UPDATE, SIZE_UPDATE);
+}
+
+void SurfaceInterceptorTest::alphaUpdate() {
+    mBGSurfaceControl->setAlpha(ALPHA_UPDATE);
+}
+
+void SurfaceInterceptorTest::layerUpdate() {
+    mBGSurfaceControl->setLayer(LAYER_UPDATE);
+}
+
+void SurfaceInterceptorTest::cropUpdate() {
+    mBGSurfaceControl->setCrop(CROP_UPDATE);
+}
+
+void SurfaceInterceptorTest::finalCropUpdate() {
+    mBGSurfaceControl->setFinalCrop(CROP_UPDATE);
+}
+
+void SurfaceInterceptorTest::matrixUpdate() {
+    mBGSurfaceControl->setMatrix(M_SQRT1_2, M_SQRT1_2, -M_SQRT1_2, M_SQRT1_2);
+}
+
+void SurfaceInterceptorTest::overrideScalingModeUpdate() {
+    mBGSurfaceControl->setOverrideScalingMode(SCALING_UPDATE);
+}
+
+void SurfaceInterceptorTest::transparentRegionHintUpdate() {
+    Region region(CROP_UPDATE);
+    mBGSurfaceControl->setTransparentRegionHint(region);
+}
+
+void SurfaceInterceptorTest::layerStackUpdate() {
+    mBGSurfaceControl->setLayerStack(STACK_UPDATE);
+}
+
+void SurfaceInterceptorTest::hiddenFlagUpdate() {
+    mBGSurfaceControl->setFlags(layer_state_t::eLayerHidden, layer_state_t::eLayerHidden);
+}
+
+void SurfaceInterceptorTest::opaqueFlagUpdate() {
+    mBGSurfaceControl->setFlags(layer_state_t::eLayerOpaque, layer_state_t::eLayerOpaque);
+}
+
+void SurfaceInterceptorTest::secureFlagUpdate() {
+    mBGSurfaceControl->setFlags(layer_state_t::eLayerSecure, layer_state_t::eLayerSecure);
+}
+
+void SurfaceInterceptorTest::deferredTransactionUpdate() {
+    mBGSurfaceControl->deferTransactionUntil(mBGSurfaceControl->getHandle(), DEFERRED_UPDATE);
+}
+
+void SurfaceInterceptorTest::displayCreation() {
+    sp<IBinder> testDisplay = SurfaceComposerClient::createDisplay(DISPLAY_NAME, true);
+    SurfaceComposerClient::destroyDisplay(testDisplay);
+}
+
+void SurfaceInterceptorTest::displayDeletion() {
+    sp<IBinder> testDisplay = SurfaceComposerClient::createDisplay(DISPLAY_NAME, false);
+    mTargetId = getDisplayId(DISPLAY_NAME.string());
+    SurfaceComposerClient::destroyDisplay(testDisplay);
+}
+
+void SurfaceInterceptorTest::runAllUpdates() {
+    runInTransaction(&SurfaceInterceptorTest::positionUpdate);
+    runInTransaction(&SurfaceInterceptorTest::sizeUpdate);
+    runInTransaction(&SurfaceInterceptorTest::alphaUpdate);
+    runInTransaction(&SurfaceInterceptorTest::layerUpdate);
+    runInTransaction(&SurfaceInterceptorTest::cropUpdate);
+    runInTransaction(&SurfaceInterceptorTest::finalCropUpdate);
+    runInTransaction(&SurfaceInterceptorTest::matrixUpdate);
+    runInTransaction(&SurfaceInterceptorTest::overrideScalingModeUpdate);
+    runInTransaction(&SurfaceInterceptorTest::transparentRegionHintUpdate);
+    runInTransaction(&SurfaceInterceptorTest::layerStackUpdate);
+    runInTransaction(&SurfaceInterceptorTest::hiddenFlagUpdate);
+    runInTransaction(&SurfaceInterceptorTest::opaqueFlagUpdate);
+    runInTransaction(&SurfaceInterceptorTest::secureFlagUpdate);
+    runInTransaction(&SurfaceInterceptorTest::deferredTransactionUpdate);
+}
+
+void SurfaceInterceptorTest::surfaceCreation() {
+    mComposerClient->createSurface(String8(LAYER_NAME), SIZE_UPDATE, SIZE_UPDATE,
+            PIXEL_FORMAT_RGBA_8888, 0);
+}
+
+void SurfaceInterceptorTest::nBufferUpdates() {
+    std::random_device rd;
+    std::mt19937_64 gen(rd());
+    // This makes testing fun
+    std::uniform_int_distribution<uint8_t> dis;
+    for (uint32_t i = 0; i < BUFFER_UPDATES; ++i) {
+        fillSurfaceRGBA8(mBGSurfaceControl, dis(gen), dis(gen), dis(gen));
+    }
+}
+
+bool SurfaceInterceptorTest::positionUpdateFound(const SurfaceChange& change, bool foundPosition) {
+    // There should only be one position transaction with x and y = POSITION_UPDATE
+    bool hasX(change.position().x() == POSITION_UPDATE);
+    bool hasY(change.position().y() == POSITION_UPDATE);
+    if (hasX && hasY && !foundPosition) {
+        foundPosition = true;
+    }
+    // Failed because the position update was found a second time
+    else if (hasX && hasY && foundPosition) {
+        [] () { FAIL(); }();
+    }
+    return foundPosition;
+}
+
+bool SurfaceInterceptorTest::sizeUpdateFound(const SurfaceChange& change, bool foundSize) {
+    bool hasWidth(change.size().h() == SIZE_UPDATE);
+    bool hasHeight(change.size().w() == SIZE_UPDATE);
+    if (hasWidth && hasHeight && !foundSize) {
+        foundSize = true;
+    }
+    else if (hasWidth && hasHeight && foundSize) {
+        [] () { FAIL(); }();
+    }
+    return foundSize;
+}
+
+bool SurfaceInterceptorTest::alphaUpdateFound(const SurfaceChange& change, bool foundAlpha) {
+    bool hasAlpha(change.alpha().alpha() == ALPHA_UPDATE);
+    if (hasAlpha && !foundAlpha) {
+        foundAlpha = true;
+    }
+    else if (hasAlpha && foundAlpha) {
+        [] () { FAIL(); }();
+    }
+    return foundAlpha;
+}
+
+bool SurfaceInterceptorTest::layerUpdateFound(const SurfaceChange& change, bool foundLayer) {
+    bool hasLayer(change.layer().layer() == LAYER_UPDATE);
+    if (hasLayer && !foundLayer) {
+        foundLayer = true;
+    }
+    else if (hasLayer && foundLayer) {
+        [] () { FAIL(); }();
+    }
+    return foundLayer;
+}
+
+bool SurfaceInterceptorTest::cropUpdateFound(const SurfaceChange& change, bool foundCrop) {
+    bool hasLeft(change.crop().rectangle().left() == CROP_UPDATE.left);
+    bool hasTop(change.crop().rectangle().top() == CROP_UPDATE.top);
+    bool hasRight(change.crop().rectangle().right() == CROP_UPDATE.right);
+    bool hasBottom(change.crop().rectangle().bottom() == CROP_UPDATE.bottom);
+    if (hasLeft && hasRight && hasTop && hasBottom && !foundCrop) {
+        foundCrop = true;
+    }
+    else if (hasLeft && hasRight && hasTop && hasBottom && foundCrop) {
+        [] () { FAIL(); }();
+    }
+    return foundCrop;
+}
+
+bool SurfaceInterceptorTest::finalCropUpdateFound(const SurfaceChange& change,
+        bool foundFinalCrop)
+{
+    bool hasLeft(change.final_crop().rectangle().left() == CROP_UPDATE.left);
+    bool hasTop(change.final_crop().rectangle().top() == CROP_UPDATE.top);
+    bool hasRight(change.final_crop().rectangle().right() == CROP_UPDATE.right);
+    bool hasBottom(change.final_crop().rectangle().bottom() == CROP_UPDATE.bottom);
+    if (hasLeft && hasRight && hasTop && hasBottom && !foundFinalCrop) {
+        foundFinalCrop = true;
+    }
+    else if (hasLeft && hasRight && hasTop && hasBottom && foundFinalCrop) {
+        [] () { FAIL(); }();
+    }
+    return foundFinalCrop;
+}
+
+bool SurfaceInterceptorTest::matrixUpdateFound(const SurfaceChange& change, bool foundMatrix) {
+    bool hasSx((float)change.matrix().dsdx() == (float)M_SQRT1_2);
+    bool hasTx((float)change.matrix().dtdx() == (float)M_SQRT1_2);
+    bool hasSy((float)change.matrix().dsdy() == (float)-M_SQRT1_2);
+    bool hasTy((float)change.matrix().dtdy() == (float)M_SQRT1_2);
+    if (hasSx && hasTx && hasSy && hasTy && !foundMatrix) {
+        foundMatrix = true;
+    }
+    else if (hasSx && hasTx && hasSy && hasTy && foundMatrix) {
+        [] () { FAIL(); }();
+    }
+    return foundMatrix;
+}
+
+bool SurfaceInterceptorTest::scalingModeUpdateFound(const SurfaceChange& change,
+        bool foundScalingMode)
+{
+    bool hasScalingUpdate(change.override_scaling_mode().override_scaling_mode() == SCALING_UPDATE);
+    if (hasScalingUpdate && !foundScalingMode) {
+        foundScalingMode = true;
+    }
+    else if (hasScalingUpdate && foundScalingMode) {
+        [] () { FAIL(); }();
+    }
+    return foundScalingMode;
+}
+
+bool SurfaceInterceptorTest::transparentRegionHintUpdateFound(const SurfaceChange& change,
+        bool foundTransparentRegion)
+{
+    auto traceRegion = change.transparent_region_hint().region(0);
+    bool hasLeft(traceRegion.left() == CROP_UPDATE.left);
+    bool hasTop(traceRegion.top() == CROP_UPDATE.top);
+    bool hasRight(traceRegion.right() == CROP_UPDATE.right);
+    bool hasBottom(traceRegion.bottom() == CROP_UPDATE.bottom);
+    if (hasLeft && hasRight && hasTop && hasBottom && !foundTransparentRegion) {
+        foundTransparentRegion = true;
+    }
+    else if (hasLeft && hasRight && hasTop && hasBottom && foundTransparentRegion) {
+        [] () { FAIL(); }();
+    }
+    return foundTransparentRegion;
+}
+
+bool SurfaceInterceptorTest::layerStackUpdateFound(const SurfaceChange& change,
+        bool foundLayerStack)
+{
+    bool hasLayerStackUpdate(change.layer_stack().layer_stack() == STACK_UPDATE);
+    if (hasLayerStackUpdate && !foundLayerStack) {
+        foundLayerStack = true;
+    }
+    else if (hasLayerStackUpdate && foundLayerStack) {
+        [] () { FAIL(); }();
+    }
+    return foundLayerStack;
+}
+
+bool SurfaceInterceptorTest::hiddenFlagUpdateFound(const SurfaceChange& change,
+        bool foundHiddenFlag)
+{
+    bool hasHiddenFlag(change.hidden_flag().hidden_flag());
+    if (hasHiddenFlag && !foundHiddenFlag) {
+        foundHiddenFlag = true;
+    }
+    else if (hasHiddenFlag && foundHiddenFlag) {
+        [] () { FAIL(); }();
+    }
+    return foundHiddenFlag;
+}
+
+bool SurfaceInterceptorTest::opaqueFlagUpdateFound(const SurfaceChange& change,
+        bool foundOpaqueFlag)
+{
+    bool hasOpaqueFlag(change.opaque_flag().opaque_flag());
+    if (hasOpaqueFlag && !foundOpaqueFlag) {
+        foundOpaqueFlag = true;
+    }
+    else if (hasOpaqueFlag && foundOpaqueFlag) {
+        [] () { FAIL(); }();
+    }
+    return foundOpaqueFlag;
+}
+
+bool SurfaceInterceptorTest::secureFlagUpdateFound(const SurfaceChange& change,
+        bool foundSecureFlag)
+{
+    bool hasSecureFlag(change.secure_flag().secure_flag());
+    if (hasSecureFlag && !foundSecureFlag) {
+        foundSecureFlag = true;
+    }
+    else if (hasSecureFlag && foundSecureFlag) {
+        [] () { FAIL(); }();
+    }
+    return foundSecureFlag;
+}
+
+bool SurfaceInterceptorTest::deferredTransactionUpdateFound(const SurfaceChange& change,
+        bool foundDeferred)
+{
+    bool hasId(change.deferred_transaction().layer_id() == mBGLayerId);
+    bool hasFrameNumber(change.deferred_transaction().frame_number() == DEFERRED_UPDATE);
+    if (hasId && hasFrameNumber && !foundDeferred) {
+        foundDeferred = true;
+    }
+    else if (hasId && hasFrameNumber && foundDeferred) {
+        [] () { FAIL(); }();
+    }
+    return foundDeferred;
+}
+
+bool SurfaceInterceptorTest::surfaceUpdateFound(Trace* trace,
+        SurfaceChange::SurfaceChangeCase changeCase)
+{
+    bool foundUpdate = false;
+    for (const auto& increment : *trace->mutable_increment()) {
+        if (increment.increment_case() == increment.kTransaction) {
+            for (const auto& change : increment.transaction().surface_change()) {
+                if (change.id() == mBGLayerId && change.SurfaceChange_case() == changeCase) {
+                    switch (changeCase) {
+                        case SurfaceChange::SurfaceChangeCase::kPosition:
+                            // foundUpdate is sent for the tests to fail on duplicated increments
+                            foundUpdate = positionUpdateFound(change, foundUpdate);
+                            break;
+                        case SurfaceChange::SurfaceChangeCase::kSize:
+                            foundUpdate = sizeUpdateFound(change, foundUpdate);
+                            break;
+                        case SurfaceChange::SurfaceChangeCase::kAlpha:
+                            foundUpdate = alphaUpdateFound(change, foundUpdate);
+                            break;
+                        case SurfaceChange::SurfaceChangeCase::kLayer:
+                            foundUpdate = layerUpdateFound(change, foundUpdate);
+                            break;
+                        case SurfaceChange::SurfaceChangeCase::kCrop:
+                            foundUpdate = cropUpdateFound(change, foundUpdate);
+                            break;
+                        case SurfaceChange::SurfaceChangeCase::kFinalCrop:
+                            foundUpdate = finalCropUpdateFound(change, foundUpdate);
+                            break;
+                        case SurfaceChange::SurfaceChangeCase::kMatrix:
+                            foundUpdate = matrixUpdateFound(change, foundUpdate);
+                            break;
+                        case SurfaceChange::SurfaceChangeCase::kOverrideScalingMode:
+                            foundUpdate = scalingModeUpdateFound(change, foundUpdate);
+                            break;
+                        case SurfaceChange::SurfaceChangeCase::kTransparentRegionHint:
+                            foundUpdate = transparentRegionHintUpdateFound(change, foundUpdate);
+                            break;
+                        case SurfaceChange::SurfaceChangeCase::kLayerStack:
+                            foundUpdate = layerStackUpdateFound(change, foundUpdate);
+                            break;
+                        case SurfaceChange::SurfaceChangeCase::kHiddenFlag:
+                            foundUpdate = hiddenFlagUpdateFound(change, foundUpdate);
+                            break;
+                        case SurfaceChange::SurfaceChangeCase::kOpaqueFlag:
+                            foundUpdate = opaqueFlagUpdateFound(change, foundUpdate);
+                            break;
+                        case SurfaceChange::SurfaceChangeCase::kSecureFlag:
+                            foundUpdate = secureFlagUpdateFound(change, foundUpdate);
+                            break;
+                        case SurfaceChange::SurfaceChangeCase::kDeferredTransaction:
+                            foundUpdate = deferredTransactionUpdateFound(change, foundUpdate);
+                            break;
+                        case SurfaceChange::SurfaceChangeCase::SURFACECHANGE_NOT_SET:
+                            break;
+                    }
+                }
+            }
+        }
+    }
+    return foundUpdate;
+}
+
+void SurfaceInterceptorTest::assertAllUpdatesFound(Trace* trace) {
+    ASSERT_TRUE(surfaceUpdateFound(trace, SurfaceChange::SurfaceChangeCase::kPosition));
+    ASSERT_TRUE(surfaceUpdateFound(trace, SurfaceChange::SurfaceChangeCase::kSize));
+    ASSERT_TRUE(surfaceUpdateFound(trace, SurfaceChange::SurfaceChangeCase::kAlpha));
+    ASSERT_TRUE(surfaceUpdateFound(trace, SurfaceChange::SurfaceChangeCase::kLayer));
+    ASSERT_TRUE(surfaceUpdateFound(trace, SurfaceChange::SurfaceChangeCase::kCrop));
+    ASSERT_TRUE(surfaceUpdateFound(trace, SurfaceChange::SurfaceChangeCase::kFinalCrop));
+    ASSERT_TRUE(surfaceUpdateFound(trace, SurfaceChange::SurfaceChangeCase::kMatrix));
+    ASSERT_TRUE(surfaceUpdateFound(trace, SurfaceChange::SurfaceChangeCase::kOverrideScalingMode));
+    ASSERT_TRUE(surfaceUpdateFound(trace, SurfaceChange::SurfaceChangeCase::kTransparentRegionHint));
+    ASSERT_TRUE(surfaceUpdateFound(trace, SurfaceChange::SurfaceChangeCase::kLayerStack));
+    ASSERT_TRUE(surfaceUpdateFound(trace, SurfaceChange::SurfaceChangeCase::kHiddenFlag));
+    ASSERT_TRUE(surfaceUpdateFound(trace, SurfaceChange::SurfaceChangeCase::kOpaqueFlag));
+    ASSERT_TRUE(surfaceUpdateFound(trace, SurfaceChange::SurfaceChangeCase::kSecureFlag));
+    ASSERT_TRUE(surfaceUpdateFound(trace, SurfaceChange::SurfaceChangeCase::kDeferredTransaction));
+}
+
+bool SurfaceInterceptorTest::surfaceCreationFound(const Increment& increment, bool foundSurface) {
+    bool isMatch(increment.surface_creation().name() == LAYER_NAME &&
+            increment.surface_creation().w() == SIZE_UPDATE &&
+            increment.surface_creation().h() == SIZE_UPDATE);
+    if (isMatch && !foundSurface) {
+        foundSurface = true;
+    }
+    else if (isMatch && foundSurface) {
+        [] () { FAIL(); }();
+    }
+    return foundSurface;
+}
+
+bool SurfaceInterceptorTest::surfaceDeletionFound(const Increment& increment, bool foundSurface) {
+    bool isMatch(increment.surface_deletion().id() == mTargetId);
+    if (isMatch && !foundSurface) {
+        foundSurface = true;
+    }
+    else if (isMatch && foundSurface) {
+        [] () { FAIL(); }();
+    }
+    return foundSurface;
+}
+
+bool SurfaceInterceptorTest::displayCreationFound(const Increment& increment, bool foundDisplay) {
+    bool isMatch(increment.display_creation().name() == DISPLAY_NAME.string() &&
+            increment.display_creation().is_secure());
+    if (isMatch && !foundDisplay) {
+        foundDisplay = true;
+    }
+    else if (isMatch && foundDisplay) {
+        [] () { FAIL(); }();
+    }
+    return foundDisplay;
+}
+
+bool SurfaceInterceptorTest::displayDeletionFound(const Increment& increment, bool foundDisplay) {
+    bool isMatch(increment.display_deletion().id() == mTargetId);
+    if (isMatch && !foundDisplay) {
+        foundDisplay = true;
+    }
+    else if (isMatch && foundDisplay) {
+        [] () { FAIL(); }();
+    }
+    return foundDisplay;
+}
+
+bool SurfaceInterceptorTest::singleIncrementFound(Trace* trace,
+        Increment::IncrementCase incrementCase)
+{
+    bool foundIncrement = false;
+    for (const auto& increment : *trace->mutable_increment()) {
+        if (increment.increment_case() == incrementCase) {
+            switch (incrementCase) {
+                case Increment::IncrementCase::kSurfaceCreation:
+                    foundIncrement = surfaceCreationFound(increment, foundIncrement);
+                    break;
+                case Increment::IncrementCase::kSurfaceDeletion:
+                    foundIncrement = surfaceDeletionFound(increment, foundIncrement);
+                    break;
+                case Increment::IncrementCase::kDisplayCreation:
+                    foundIncrement = displayCreationFound(increment, foundIncrement);
+                    break;
+                case Increment::IncrementCase::kDisplayDeletion:
+                    foundIncrement = displayDeletionFound(increment, foundIncrement);
+                    break;
+                default:
+                    /* code */
+                    break;
+            }
+        }
+    }
+    return foundIncrement;
+}
+
+bool SurfaceInterceptorTest::bufferUpdatesFound(Trace* trace) {
+    uint32_t updates = 0;
+    for (const auto& inc : *trace->mutable_increment()) {
+        if (inc.increment_case() == inc.kBufferUpdate && inc.buffer_update().id() == mBGLayerId) {
+            updates++;
+        }
+    }
+    return updates == BUFFER_UPDATES;
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptPositionUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::positionUpdate,
+            SurfaceChange::SurfaceChangeCase::kPosition);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptSizeUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::sizeUpdate, SurfaceChange::SurfaceChangeCase::kSize);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptAlphaUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::alphaUpdate, SurfaceChange::SurfaceChangeCase::kAlpha);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptLayerUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::layerUpdate, SurfaceChange::SurfaceChangeCase::kLayer);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptCropUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::cropUpdate, SurfaceChange::SurfaceChangeCase::kCrop);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptFinalCropUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::finalCropUpdate,
+            SurfaceChange::SurfaceChangeCase::kFinalCrop);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptMatrixUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::matrixUpdate, SurfaceChange::SurfaceChangeCase::kMatrix);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptOverrideScalingModeUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::overrideScalingModeUpdate,
+            SurfaceChange::SurfaceChangeCase::kOverrideScalingMode);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptTransparentRegionHintUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::transparentRegionHintUpdate,
+            SurfaceChange::SurfaceChangeCase::kTransparentRegionHint);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptLayerStackUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::layerStackUpdate,
+            SurfaceChange::SurfaceChangeCase::kLayerStack);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptHiddenFlagUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::hiddenFlagUpdate,
+            SurfaceChange::SurfaceChangeCase::kHiddenFlag);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptOpaqueFlagUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::opaqueFlagUpdate,
+            SurfaceChange::SurfaceChangeCase::kOpaqueFlag);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptSecureFlagUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::secureFlagUpdate,
+            SurfaceChange::SurfaceChangeCase::kSecureFlag);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptDeferredTransactionUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::deferredTransactionUpdate,
+            SurfaceChange::SurfaceChangeCase::kDeferredTransaction);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptAllUpdatesWorks) {
+    enableInterceptor();
+    runAllUpdates();
+    disableInterceptor();
+
+    // Find all of the updates in the single trace
+    Trace capturedTrace;
+    ASSERT_EQ(NO_ERROR, readProtoFile(&capturedTrace));
+    assertAllUpdatesFound(&capturedTrace);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptSurfaceCreationWorks) {
+    captureTest(&SurfaceInterceptorTest::surfaceCreation,
+            Increment::IncrementCase::kSurfaceCreation);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptSurfaceDeletionWorks) {
+    sp<SurfaceControl> layerToDelete = mComposerClient->createSurface(String8(LAYER_NAME),
+            SIZE_UPDATE, SIZE_UPDATE, PIXEL_FORMAT_RGBA_8888, 0);
+    this->mTargetId = getSurfaceId(LAYER_NAME);
+    enableInterceptor();
+    mComposerClient->destroySurface(layerToDelete->getHandle());
+    disableInterceptor();
+
+    Trace capturedTrace;
+    ASSERT_EQ(NO_ERROR, readProtoFile(&capturedTrace));
+    ASSERT_TRUE(singleIncrementFound(&capturedTrace, Increment::IncrementCase::kSurfaceDeletion));
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptDisplayCreationWorks) {
+    captureTest(&SurfaceInterceptorTest::displayCreation,
+            Increment::IncrementCase::kDisplayCreation);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptDisplayDeletionWorks) {
+    captureTest(&SurfaceInterceptorTest::displayDeletion,
+            Increment::IncrementCase::kDisplayDeletion);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptBufferUpdateWorks) {
+    captureTest(&SurfaceInterceptorTest::nBufferUpdates,
+            &SurfaceInterceptorTest::bufferUpdatesFound);
+}
+
+// If the interceptor is enabled while buffer updates are being pushed, the interceptor should
+// first create a snapshot of the existing displays and surfaces and then start capturing
+// the buffer updates
+TEST_F(SurfaceInterceptorTest, InterceptWhileBufferUpdatesWorks) {
+    std::thread bufferUpdates(&SurfaceInterceptorTest::nBufferUpdates, this);
+    enableInterceptor();
+    disableInterceptor();
+    bufferUpdates.join();
+
+    Trace capturedTrace;
+    ASSERT_EQ(NO_ERROR, readProtoFile(&capturedTrace));
+    const auto& firstIncrement = capturedTrace.mutable_increment(0);
+    ASSERT_EQ(firstIncrement->increment_case(), Increment::IncrementCase::kDisplayCreation);
+}
+
+TEST_F(SurfaceInterceptorTest, InterceptSimultaneousUpdatesWorks) {
+    enableInterceptor();
+    std::thread bufferUpdates(&SurfaceInterceptorTest::nBufferUpdates, this);
+    std::thread surfaceUpdates(&SurfaceInterceptorTest::runAllUpdates, this);
+    runInTransaction(&SurfaceInterceptorTest::surfaceCreation);
+    bufferUpdates.join();
+    surfaceUpdates.join();
+    disableInterceptor();
+
+    Trace capturedTrace;
+    ASSERT_EQ(NO_ERROR, readProtoFile(&capturedTrace));
+
+    assertAllUpdatesFound(&capturedTrace);
+    ASSERT_TRUE(bufferUpdatesFound(&capturedTrace));
+    ASSERT_TRUE(singleIncrementFound(&capturedTrace, Increment::IncrementCase::kSurfaceCreation));
+}
+
+}
diff --git a/services/surfaceflinger/tests/Transaction_test.cpp b/services/surfaceflinger/tests/Transaction_test.cpp
index f8d4d13..79cd245 100644
--- a/services/surfaceflinger/tests/Transaction_test.cpp
+++ b/services/surfaceflinger/tests/Transaction_test.cpp
@@ -61,7 +61,6 @@
         sp<IGraphicBufferProducer> producer;
         sp<IGraphicBufferConsumer> consumer;
         BufferQueue::createBufferQueue(&producer, &consumer);
-        IGraphicBufferProducer::QueueBufferOutput bufferOutput;
         sp<CpuConsumer> cpuConsumer = new CpuConsumer(consumer, 1);
         sp<ISurfaceComposer> sf(ComposerService::getComposerService());
         sp<IBinder> display(sf->getBuiltInDisplay(
diff --git a/vulkan/api/vulkan.api b/vulkan/api/vulkan.api
index 870f8eb..37cc448 100644
--- a/vulkan/api/vulkan.api
+++ b/vulkan/api/vulkan.api
@@ -28,7 +28,7 @@
 // API version (major.minor.patch)
 define VERSION_MAJOR 1
 define VERSION_MINOR 0
-define VERSION_PATCH 13
+define VERSION_PATCH 22
 
 // API limits
 define VK_MAX_PHYSICAL_DEVICE_NAME_SIZE 256
@@ -78,7 +78,7 @@
 @extension("VK_ANDROID_native_buffer") define VK_ANDROID_NATIVE_BUFFER_SPEC_VERSION     5
 @extension("VK_ANDROID_native_buffer") define VK_ANDROID_NATIVE_BUFFER_NAME             "VK_ANDROID_native_buffer"
 
-@extension("VK_EXT_debug_report") define VK_EXT_DEBUG_REPORT_SPEC_VERSION       2
+@extension("VK_EXT_debug_report") define VK_EXT_DEBUG_REPORT_SPEC_VERSION       3
 @extension("VK_EXT_debug_report") define VK_EXT_DEBUG_REPORT_NAME               "VK_EXT_debug_report"
 
 @extension("VK_NV_glsl_shader") define VK_NV_GLSL_SHADER_SPEC_VERSION           1
@@ -93,9 +93,21 @@
 @extension("VK_AMD_rasterization_order") define VK_AMD_RASTERIZATION_ORDER_SPEC_VERSION   1
 @extension("VK_AMD_rasterization_order") define VK_AMD_RASTERIZATION_ORDER_NAME           "VK_AMD_rasterization_order"
 
+@extension("VK_AMD_shader_trinary_minmax") define VK_AMD_SHADER_TRINARY_MINMAX_SPEC_VERSION 1
+@extension("VK_AMD_shader_trinary_minmax") define VK_AMD_SHADER_TRINARY_MINMAX_EXTENSION_NAME "VK_AMD_shader_trinary_minmax"
+
+@extension("VK_AMD_shader_explicit_vertex_parameter") define VK_AMD_SHADER_EXPLICIT_VERTEX_PARAMETER_SPEC_VERSION 1
+@extension("VK_AMD_shader_explicit_vertex_parameter") define VK_AMD_SHADER_EXPLICIT_VERTEX_PARAMETER_EXTENSION_NAME "VK_AMD_shader_explicit_vertex_parameter"
+
 @extension("VK_EXT_debug_marker") define VK_EXT_DEBUG_MARKER_SPEC_VERSION       3
 @extension("VK_EXT_debug_marker") define VK_EXT_DEBUG_MARKER_NAME               "VK_EXT_debug_marker"
 
+@extension("VK_AMD_gcn_shader") define VK_AMD_GCN_SHADER_SPEC_VERSION 1
+@extension("VK_AMD_gcn_shader") define VK_AMD_GCN_SHADER_EXTENSION_NAME "VK_AMD_gcn_shader"
+
+@extension("VK_NV_dedicated_allocation") define VK_NV_DEDICATED_ALLOCATION_SPEC_VERSION 1
+@extension("VK_NV_dedicated_allocation") define VK_NV_DEDICATED_ALLOCATION_EXTENSION_NAME "VK_NV_dedicated_allocation"
+
 
 /////////////
 //  Types  //
@@ -684,6 +696,15 @@
 
     //@extension("VK_EXT_debug_marker")
     VK_STRUCTURE_TYPE_DEBUG_MARKER_MARKER_INFO_EXT              = 1000022002,
+
+    //@extension("VK_NV_dedicated_allocation")
+    VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_IMAGE_CREATE_INFO_NV = 1000026000,
+
+    //@extension("VK_NV_dedicated_allocation")
+    VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_BUFFER_CREATE_INFO_NV = 1000026001,
+
+    //@extension("VK_NV_dedicated_allocation")
+    VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_MEMORY_ALLOCATE_INFO_NV = 1000026002,
 }
 
 enum VkSubpassContents {
@@ -721,6 +742,7 @@
     VK_ERROR_INCOMPATIBLE_DRIVER                            = 0xFFFFFFF7, // -9
     VK_ERROR_TOO_MANY_OBJECTS                               = 0xFFFFFFF6, // -10
     VK_ERROR_FORMAT_NOT_SUPPORTED                           = 0xFFFFFFF5, // -11
+    VK_ERROR_FRAGMENTED_POOL                                = 0xFFFFFFF4, // -12
 
     //@extension("VK_KHR_surface")
     VK_ERROR_SURFACE_LOST_KHR                               = 0xC4653600, // -1000000000
@@ -2693,6 +2715,28 @@
     f32[4]                                      color
 }
 
+@extension("VK_NV_dedicated_allocation")
+class VkDedicatedAllocationImageCreateInfoNV {
+    VkStructureType                             sType
+    const void*                                 pNext
+    VkBool32                                    dedicatedAllocation
+}
+
+@extension("VK_NV_dedicated_allocation")
+class VkDedicatedAllocationBufferCreateInfoNV {
+    VkStructureType                             sType
+    const void*                                 pNext
+    VkBool32                                    dedicatedAllocation
+}
+
+@extension("VK_NV_dedicated_allocation")
+class VkDedicatedAllocationMemoryAllocateInfoNV {
+    VkStructureType                             sType
+    const void*                                 pNext
+    VkImage                                     image
+    VkBuffer                                    buffer
+}
+
 
 ////////////////
 //  Commands  //
@@ -4570,7 +4614,7 @@
         VkBuffer                                    dstBuffer,
         VkDeviceSize                                dstOffset,
         VkDeviceSize                                dataSize,
-        const u32*                                  pData) {
+        const void*                                 pData) {
     commandBufferObject := GetCommandBuffer(commandBuffer)
     dstBufferObject := GetBuffer(dstBuffer)
     assert(commandBufferObject.device == dstBufferObject.device)
diff --git a/vulkan/include/vulkan/vk_platform.h b/vulkan/include/vulkan/vk_platform.h
index 5d0fc76..c2232ec 100644
--- a/vulkan/include/vulkan/vk_platform.h
+++ b/vulkan/include/vulkan/vk_platform.h
@@ -51,13 +51,13 @@
     #define VKAPI_ATTR
     #define VKAPI_CALL __stdcall
     #define VKAPI_PTR  VKAPI_CALL
-#elif defined(__ANDROID__) && defined(__ARM_EABI__) && !defined(__ARM_ARCH_7A__)
-    // Android does not support Vulkan in native code using the "armeabi" ABI.
-    #error "Vulkan requires the 'armeabi-v7a' or 'armeabi-v7a-hard' ABI on 32-bit ARM CPUs"
-#elif defined(__ANDROID__) && defined(__ARM_ARCH_7A__)
-    // On Android/ARMv7a, Vulkan functions use the armeabi-v7a-hard calling
-    // convention, even if the application's native code is compiled with the
-    // armeabi-v7a calling convention.
+#elif defined(__ANDROID__) && defined(__ARM_ARCH) && __ARM_ARCH < 7
+    #error "Vulkan isn't supported for the 'armeabi' NDK ABI"
+#elif defined(__ANDROID__) && __ARM_ARCH >= 7 && __ARM_32BIT_STATE
+    // On Android 32-bit ARM targets, Vulkan functions use the "hardfloat"
+    // calling convention, i.e. float parameters are passed in registers. This
+    // is true even if the rest of the application passes floats on the stack,
+    // as it does by default when compiling for the armeabi-v7a NDK ABI.
     #define VKAPI_ATTR __attribute__((pcs("aapcs-vfp")))
     #define VKAPI_CALL
     #define VKAPI_PTR  VKAPI_ATTR
diff --git a/vulkan/include/vulkan/vulkan.h b/vulkan/include/vulkan/vulkan.h
index 2f18076..ddbb311 100644
--- a/vulkan/include/vulkan/vulkan.h
+++ b/vulkan/include/vulkan/vulkan.h
@@ -43,7 +43,7 @@
 #define VK_VERSION_MINOR(version) (((uint32_t)(version) >> 12) & 0x3ff)
 #define VK_VERSION_PATCH(version) ((uint32_t)(version) & 0xfff)
 // Version of this file
-#define VK_HEADER_VERSION 13
+#define VK_HEADER_VERSION 22
 
 
 #define VK_NULL_HANDLE 0
@@ -53,7 +53,7 @@
 #define VK_DEFINE_HANDLE(object) typedef struct object##_T* object;
 
 
-#if defined(__LP64__) || defined(_WIN64) || defined(__x86_64__) || defined(_M_X64) || defined(__ia64) || defined (_M_IA64) || defined(__aarch64__) || defined(__powerpc64__)
+#if defined(__LP64__) || defined(_WIN64) || (defined(__x86_64__) && !defined(__ILP32__) ) || defined(_M_X64) || defined(__ia64) || defined (_M_IA64) || defined(__aarch64__) || defined(__powerpc64__)
         #define VK_DEFINE_NON_DISPATCHABLE_HANDLE(object) typedef struct object##_T *object;
 #else
         #define VK_DEFINE_NON_DISPATCHABLE_HANDLE(object) typedef uint64_t object;
@@ -135,6 +135,7 @@
     VK_ERROR_INCOMPATIBLE_DRIVER = -9,
     VK_ERROR_TOO_MANY_OBJECTS = -10,
     VK_ERROR_FORMAT_NOT_SUPPORTED = -11,
+    VK_ERROR_FRAGMENTED_POOL = -12,
     VK_ERROR_SURFACE_LOST_KHR = -1000000000,
     VK_ERROR_NATIVE_WINDOW_IN_USE_KHR = -1000000001,
     VK_SUBOPTIMAL_KHR = 1000001003,
@@ -142,9 +143,9 @@
     VK_ERROR_INCOMPATIBLE_DISPLAY_KHR = -1000003001,
     VK_ERROR_VALIDATION_FAILED_EXT = -1000011001,
     VK_ERROR_INVALID_SHADER_NV = -1000012000,
-    VK_RESULT_BEGIN_RANGE = VK_ERROR_FORMAT_NOT_SUPPORTED,
+    VK_RESULT_BEGIN_RANGE = VK_ERROR_FRAGMENTED_POOL,
     VK_RESULT_END_RANGE = VK_INCOMPLETE,
-    VK_RESULT_RANGE_SIZE = (VK_INCOMPLETE - VK_ERROR_FORMAT_NOT_SUPPORTED + 1),
+    VK_RESULT_RANGE_SIZE = (VK_INCOMPLETE - VK_ERROR_FRAGMENTED_POOL + 1),
     VK_RESULT_MAX_ENUM = 0x7FFFFFFF
 } VkResult;
 
@@ -214,6 +215,9 @@
     VK_STRUCTURE_TYPE_DEBUG_MARKER_OBJECT_NAME_INFO_EXT = 1000022000,
     VK_STRUCTURE_TYPE_DEBUG_MARKER_OBJECT_TAG_INFO_EXT = 1000022001,
     VK_STRUCTURE_TYPE_DEBUG_MARKER_MARKER_INFO_EXT = 1000022002,
+    VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_IMAGE_CREATE_INFO_NV = 1000026000,
+    VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_BUFFER_CREATE_INFO_NV = 1000026001,
+    VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_MEMORY_ALLOCATE_INFO_NV = 1000026002,
     VK_STRUCTURE_TYPE_BEGIN_RANGE = VK_STRUCTURE_TYPE_APPLICATION_INFO,
     VK_STRUCTURE_TYPE_END_RANGE = VK_STRUCTURE_TYPE_LOADER_DEVICE_CREATE_INFO,
     VK_STRUCTURE_TYPE_RANGE_SIZE = (VK_STRUCTURE_TYPE_LOADER_DEVICE_CREATE_INFO - VK_STRUCTURE_TYPE_APPLICATION_INFO + 1),
@@ -2347,7 +2351,7 @@
 typedef void (VKAPI_PTR *PFN_vkCmdBlitImage)(VkCommandBuffer commandBuffer, VkImage srcImage, VkImageLayout srcImageLayout, VkImage dstImage, VkImageLayout dstImageLayout, uint32_t regionCount, const VkImageBlit* pRegions, VkFilter filter);
 typedef void (VKAPI_PTR *PFN_vkCmdCopyBufferToImage)(VkCommandBuffer commandBuffer, VkBuffer srcBuffer, VkImage dstImage, VkImageLayout dstImageLayout, uint32_t regionCount, const VkBufferImageCopy* pRegions);
 typedef void (VKAPI_PTR *PFN_vkCmdCopyImageToBuffer)(VkCommandBuffer commandBuffer, VkImage srcImage, VkImageLayout srcImageLayout, VkBuffer dstBuffer, uint32_t regionCount, const VkBufferImageCopy* pRegions);
-typedef void (VKAPI_PTR *PFN_vkCmdUpdateBuffer)(VkCommandBuffer commandBuffer, VkBuffer dstBuffer, VkDeviceSize dstOffset, VkDeviceSize dataSize, const uint32_t* pData);
+typedef void (VKAPI_PTR *PFN_vkCmdUpdateBuffer)(VkCommandBuffer commandBuffer, VkBuffer dstBuffer, VkDeviceSize dstOffset, VkDeviceSize dataSize, const void* pData);
 typedef void (VKAPI_PTR *PFN_vkCmdFillBuffer)(VkCommandBuffer commandBuffer, VkBuffer dstBuffer, VkDeviceSize dstOffset, VkDeviceSize size, uint32_t data);
 typedef void (VKAPI_PTR *PFN_vkCmdClearColorImage)(VkCommandBuffer commandBuffer, VkImage image, VkImageLayout imageLayout, const VkClearColorValue* pColor, uint32_t rangeCount, const VkImageSubresourceRange* pRanges);
 typedef void (VKAPI_PTR *PFN_vkCmdClearDepthStencilImage)(VkCommandBuffer commandBuffer, VkImage image, VkImageLayout imageLayout, const VkClearDepthStencilValue* pDepthStencil, uint32_t rangeCount, const VkImageSubresourceRange* pRanges);
@@ -3032,7 +3036,7 @@
     VkBuffer                                    dstBuffer,
     VkDeviceSize                                dstOffset,
     VkDeviceSize                                dataSize,
-    const uint32_t*                             pData);
+    const void*                                 pData);
 
 VKAPI_ATTR void VKAPI_CALL vkCmdFillBuffer(
     VkCommandBuffer                             commandBuffer,
@@ -3715,7 +3719,7 @@
 #define VK_EXT_debug_report 1
 VK_DEFINE_NON_DISPATCHABLE_HANDLE(VkDebugReportCallbackEXT)
 
-#define VK_EXT_DEBUG_REPORT_SPEC_VERSION  2
+#define VK_EXT_DEBUG_REPORT_SPEC_VERSION  3
 #define VK_EXT_DEBUG_REPORT_EXTENSION_NAME "VK_EXT_debug_report"
 #define VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT
 
@@ -3855,6 +3859,16 @@
 
 
 
+#define VK_AMD_shader_trinary_minmax 1
+#define VK_AMD_SHADER_TRINARY_MINMAX_SPEC_VERSION 1
+#define VK_AMD_SHADER_TRINARY_MINMAX_EXTENSION_NAME "VK_AMD_shader_trinary_minmax"
+
+
+#define VK_AMD_shader_explicit_vertex_parameter 1
+#define VK_AMD_SHADER_EXPLICIT_VERTEX_PARAMETER_SPEC_VERSION 1
+#define VK_AMD_SHADER_EXPLICIT_VERTEX_PARAMETER_EXTENSION_NAME "VK_AMD_shader_explicit_vertex_parameter"
+
+
 #define VK_EXT_debug_marker 1
 #define VK_EXT_DEBUG_MARKER_SPEC_VERSION  3
 #define VK_EXT_DEBUG_MARKER_EXTENSION_NAME "VK_EXT_debug_marker"
@@ -3912,6 +3926,36 @@
     VkDebugMarkerMarkerInfoEXT*                 pMarkerInfo);
 #endif
 
+#define VK_AMD_gcn_shader 1
+#define VK_AMD_GCN_SHADER_SPEC_VERSION    1
+#define VK_AMD_GCN_SHADER_EXTENSION_NAME  "VK_AMD_gcn_shader"
+
+
+#define VK_NV_dedicated_allocation 1
+#define VK_NV_DEDICATED_ALLOCATION_SPEC_VERSION 1
+#define VK_NV_DEDICATED_ALLOCATION_EXTENSION_NAME "VK_NV_dedicated_allocation"
+
+typedef struct VkDedicatedAllocationImageCreateInfoNV {
+    VkStructureType    sType;
+    const void*        pNext;
+    VkBool32           dedicatedAllocation;
+} VkDedicatedAllocationImageCreateInfoNV;
+
+typedef struct VkDedicatedAllocationBufferCreateInfoNV {
+    VkStructureType    sType;
+    const void*        pNext;
+    VkBool32           dedicatedAllocation;
+} VkDedicatedAllocationBufferCreateInfoNV;
+
+typedef struct VkDedicatedAllocationMemoryAllocateInfoNV {
+    VkStructureType    sType;
+    const void*        pNext;
+    VkImage            image;
+    VkBuffer           buffer;
+} VkDedicatedAllocationMemoryAllocateInfoNV;
+
+
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/vulkan/libvulkan/api_gen.cpp b/vulkan/libvulkan/api_gen.cpp
index 0a1dda2..a57ba72 100644
--- a/vulkan/libvulkan/api_gen.cpp
+++ b/vulkan/libvulkan/api_gen.cpp
@@ -394,7 +394,7 @@
 VKAPI_ATTR void CmdBlitImage(VkCommandBuffer commandBuffer, VkImage srcImage, VkImageLayout srcImageLayout, VkImage dstImage, VkImageLayout dstImageLayout, uint32_t regionCount, const VkImageBlit* pRegions, VkFilter filter);
 VKAPI_ATTR void CmdCopyBufferToImage(VkCommandBuffer commandBuffer, VkBuffer srcBuffer, VkImage dstImage, VkImageLayout dstImageLayout, uint32_t regionCount, const VkBufferImageCopy* pRegions);
 VKAPI_ATTR void CmdCopyImageToBuffer(VkCommandBuffer commandBuffer, VkImage srcImage, VkImageLayout srcImageLayout, VkBuffer dstBuffer, uint32_t regionCount, const VkBufferImageCopy* pRegions);
-VKAPI_ATTR void CmdUpdateBuffer(VkCommandBuffer commandBuffer, VkBuffer dstBuffer, VkDeviceSize dstOffset, VkDeviceSize dataSize, const uint32_t* pData);
+VKAPI_ATTR void CmdUpdateBuffer(VkCommandBuffer commandBuffer, VkBuffer dstBuffer, VkDeviceSize dstOffset, VkDeviceSize dataSize, const void* pData);
 VKAPI_ATTR void CmdFillBuffer(VkCommandBuffer commandBuffer, VkBuffer dstBuffer, VkDeviceSize dstOffset, VkDeviceSize size, uint32_t data);
 VKAPI_ATTR void CmdClearColorImage(VkCommandBuffer commandBuffer, VkImage image, VkImageLayout imageLayout, const VkClearColorValue* pColor, uint32_t rangeCount, const VkImageSubresourceRange* pRanges);
 VKAPI_ATTR void CmdClearDepthStencilImage(VkCommandBuffer commandBuffer, VkImage image, VkImageLayout imageLayout, const VkClearDepthStencilValue* pDepthStencil, uint32_t rangeCount, const VkImageSubresourceRange* pRanges);
@@ -1075,7 +1075,7 @@
     GetData(commandBuffer).dispatch.CmdCopyImageToBuffer(commandBuffer, srcImage, srcImageLayout, dstBuffer, regionCount, pRegions);
 }
 
-VKAPI_ATTR void CmdUpdateBuffer(VkCommandBuffer commandBuffer, VkBuffer dstBuffer, VkDeviceSize dstOffset, VkDeviceSize dataSize, const uint32_t* pData) {
+VKAPI_ATTR void CmdUpdateBuffer(VkCommandBuffer commandBuffer, VkBuffer dstBuffer, VkDeviceSize dstOffset, VkDeviceSize dataSize, const void* pData) {
     GetData(commandBuffer).dispatch.CmdUpdateBuffer(commandBuffer, dstBuffer, dstOffset, dataSize, pData);
 }
 
@@ -1795,7 +1795,7 @@
 }
 
 __attribute__((visibility("default")))
-VKAPI_ATTR void vkCmdUpdateBuffer(VkCommandBuffer commandBuffer, VkBuffer dstBuffer, VkDeviceSize dstOffset, VkDeviceSize dataSize, const uint32_t* pData) {
+VKAPI_ATTR void vkCmdUpdateBuffer(VkCommandBuffer commandBuffer, VkBuffer dstBuffer, VkDeviceSize dstOffset, VkDeviceSize dataSize, const void* pData) {
     vulkan::api::CmdUpdateBuffer(commandBuffer, dstBuffer, dstOffset, dataSize, pData);
 }
 
diff --git a/vulkan/libvulkan/layers_extensions.cpp b/vulkan/libvulkan/layers_extensions.cpp
index 82169ff..8f35f4d 100644
--- a/vulkan/libvulkan/layers_extensions.cpp
+++ b/vulkan/libvulkan/layers_extensions.cpp
@@ -68,7 +68,7 @@
 
 class LayerLibrary {
    public:
-    LayerLibrary(const std::string& path)
+    explicit LayerLibrary(const std::string& path)
         : path_(path), dlhandle_(nullptr), refcount_(0) {}
 
     LayerLibrary(LayerLibrary&& other)
diff --git a/vulkan/nulldrv/null_driver.cpp b/vulkan/nulldrv/null_driver.cpp
index 3bf3ff7..05ebcac 100644
--- a/vulkan/nulldrv/null_driver.cpp
+++ b/vulkan/nulldrv/null_driver.cpp
@@ -1334,7 +1334,7 @@
 void CmdCopyImageToBuffer(VkCommandBuffer cmdBuffer, VkImage srcImage, VkImageLayout srcImageLayout, VkBuffer destBuffer, uint32_t regionCount, const VkBufferImageCopy* pRegions) {
 }
 
-void CmdUpdateBuffer(VkCommandBuffer cmdBuffer, VkBuffer destBuffer, VkDeviceSize destOffset, VkDeviceSize dataSize, const uint32_t* pData) {
+void CmdUpdateBuffer(VkCommandBuffer cmdBuffer, VkBuffer destBuffer, VkDeviceSize destOffset, VkDeviceSize dataSize, const void* pData) {
 }
 
 void CmdFillBuffer(VkCommandBuffer cmdBuffer, VkBuffer destBuffer, VkDeviceSize destOffset, VkDeviceSize fillSize, uint32_t data) {
diff --git a/vulkan/nulldrv/null_driver.tmpl b/vulkan/nulldrv/null_driver.tmpl
index 3a84971..209d61d 100644
--- a/vulkan/nulldrv/null_driver.tmpl
+++ b/vulkan/nulldrv/null_driver.tmpl
@@ -158,16 +158,7 @@
 }
 ¶
 PFN_vkVoidFunction GetInstanceProcAddr(const char* name) {«
-    PFN_vkVoidFunction pfn;
-    if ((pfn = Lookup(name, kInstanceProcs)))
-        return pfn;
-    if (strcmp(name, "vkGetSwapchainGrallocUsageANDROID") == 0)
-        return reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkGetSwapchainGrallocUsageANDROID>(GetSwapchainGrallocUsageANDROID));
-    if (strcmp(name, "vkAcquireImageANDROID") == 0)
-        return reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkAcquireImageANDROID>(AcquireImageANDROID));
-    if (strcmp(name, "vkQueueSignalReleaseImageANDROID") == 0)
-        return reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkQueueSignalReleaseImageANDROID>(QueueSignalReleaseImageANDROID));
-    return nullptr;
+    return Lookup(name, kInstanceProcs);
 »}
 ¶
 } // namespace null_driver
diff --git a/vulkan/nulldrv/null_driver_gen.cpp b/vulkan/nulldrv/null_driver_gen.cpp
index 10da993..b078ad1 100644
--- a/vulkan/nulldrv/null_driver_gen.cpp
+++ b/vulkan/nulldrv/null_driver_gen.cpp
@@ -54,6 +54,7 @@
 
 const NameProc kInstanceProcs[] = {
     // clang-format off
+    {"vkAcquireImageANDROID", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkAcquireImageANDROID>(AcquireImageANDROID))},
     {"vkAllocateCommandBuffers", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkAllocateCommandBuffers>(AllocateCommandBuffers))},
     {"vkAllocateDescriptorSets", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkAllocateDescriptorSets>(AllocateDescriptorSets))},
     {"vkAllocateMemory", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkAllocateMemory>(AllocateMemory))},
@@ -179,10 +180,12 @@
     {"vkGetPipelineCacheData", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkGetPipelineCacheData>(GetPipelineCacheData))},
     {"vkGetQueryPoolResults", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkGetQueryPoolResults>(GetQueryPoolResults))},
     {"vkGetRenderAreaGranularity", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkGetRenderAreaGranularity>(GetRenderAreaGranularity))},
+    {"vkGetSwapchainGrallocUsageANDROID", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkGetSwapchainGrallocUsageANDROID>(GetSwapchainGrallocUsageANDROID))},
     {"vkInvalidateMappedMemoryRanges", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkInvalidateMappedMemoryRanges>(InvalidateMappedMemoryRanges))},
     {"vkMapMemory", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkMapMemory>(MapMemory))},
     {"vkMergePipelineCaches", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkMergePipelineCaches>(MergePipelineCaches))},
     {"vkQueueBindSparse", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkQueueBindSparse>(QueueBindSparse))},
+    {"vkQueueSignalReleaseImageANDROID", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkQueueSignalReleaseImageANDROID>(QueueSignalReleaseImageANDROID))},
     {"vkQueueSubmit", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkQueueSubmit>(QueueSubmit))},
     {"vkQueueWaitIdle", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkQueueWaitIdle>(QueueWaitIdle))},
     {"vkResetCommandBuffer", reinterpret_cast<PFN_vkVoidFunction>(static_cast<PFN_vkResetCommandBuffer>(ResetCommandBuffer))},
@@ -206,21 +209,7 @@
 }
 
 PFN_vkVoidFunction GetInstanceProcAddr(const char* name) {
-    PFN_vkVoidFunction pfn;
-    if ((pfn = Lookup(name, kInstanceProcs)))
-        return pfn;
-    if (strcmp(name, "vkGetSwapchainGrallocUsageANDROID") == 0)
-        return reinterpret_cast<PFN_vkVoidFunction>(
-            static_cast<PFN_vkGetSwapchainGrallocUsageANDROID>(
-                GetSwapchainGrallocUsageANDROID));
-    if (strcmp(name, "vkAcquireImageANDROID") == 0)
-        return reinterpret_cast<PFN_vkVoidFunction>(
-            static_cast<PFN_vkAcquireImageANDROID>(AcquireImageANDROID));
-    if (strcmp(name, "vkQueueSignalReleaseImageANDROID") == 0)
-        return reinterpret_cast<PFN_vkVoidFunction>(
-            static_cast<PFN_vkQueueSignalReleaseImageANDROID>(
-                QueueSignalReleaseImageANDROID));
-    return nullptr;
+    return Lookup(name, kInstanceProcs);
 }
 
 }  // namespace null_driver
diff --git a/vulkan/nulldrv/null_driver_gen.h b/vulkan/nulldrv/null_driver_gen.h
index 98952b8..4052d26 100644
--- a/vulkan/nulldrv/null_driver_gen.h
+++ b/vulkan/nulldrv/null_driver_gen.h
@@ -145,7 +145,7 @@
 VKAPI_ATTR void CmdBlitImage(VkCommandBuffer commandBuffer, VkImage srcImage, VkImageLayout srcImageLayout, VkImage dstImage, VkImageLayout dstImageLayout, uint32_t regionCount, const VkImageBlit* pRegions, VkFilter filter);
 VKAPI_ATTR void CmdCopyBufferToImage(VkCommandBuffer commandBuffer, VkBuffer srcBuffer, VkImage dstImage, VkImageLayout dstImageLayout, uint32_t regionCount, const VkBufferImageCopy* pRegions);
 VKAPI_ATTR void CmdCopyImageToBuffer(VkCommandBuffer commandBuffer, VkImage srcImage, VkImageLayout srcImageLayout, VkBuffer dstBuffer, uint32_t regionCount, const VkBufferImageCopy* pRegions);
-VKAPI_ATTR void CmdUpdateBuffer(VkCommandBuffer commandBuffer, VkBuffer dstBuffer, VkDeviceSize dstOffset, VkDeviceSize dataSize, const uint32_t* pData);
+VKAPI_ATTR void CmdUpdateBuffer(VkCommandBuffer commandBuffer, VkBuffer dstBuffer, VkDeviceSize dstOffset, VkDeviceSize dataSize, const void* pData);
 VKAPI_ATTR void CmdFillBuffer(VkCommandBuffer commandBuffer, VkBuffer dstBuffer, VkDeviceSize dstOffset, VkDeviceSize size, uint32_t data);
 VKAPI_ATTR void CmdClearColorImage(VkCommandBuffer commandBuffer, VkImage image, VkImageLayout imageLayout, const VkClearColorValue* pColor, uint32_t rangeCount, const VkImageSubresourceRange* pRanges);
 VKAPI_ATTR void CmdClearDepthStencilImage(VkCommandBuffer commandBuffer, VkImage image, VkImageLayout imageLayout, const VkClearDepthStencilValue* pDepthStencil, uint32_t rangeCount, const VkImageSubresourceRange* pRanges);
@@ -165,6 +165,9 @@
 VKAPI_ATTR void CmdNextSubpass(VkCommandBuffer commandBuffer, VkSubpassContents contents);
 VKAPI_ATTR void CmdEndRenderPass(VkCommandBuffer commandBuffer);
 VKAPI_ATTR void CmdExecuteCommands(VkCommandBuffer commandBuffer, uint32_t commandBufferCount, const VkCommandBuffer* pCommandBuffers);
+VKAPI_ATTR VkResult GetSwapchainGrallocUsageANDROID(VkDevice device, VkFormat format, VkImageUsageFlags imageUsage, int* grallocUsage);
+VKAPI_ATTR VkResult AcquireImageANDROID(VkDevice device, VkImage image, int nativeFenceFd, VkSemaphore semaphore, VkFence fence);
+VKAPI_ATTR VkResult QueueSignalReleaseImageANDROID(VkQueue queue, uint32_t waitSemaphoreCount, const VkSemaphore* pWaitSemaphores, VkImage image, int* pNativeFenceFd);
 VKAPI_ATTR VkResult CreateDebugReportCallbackEXT(VkInstance instance, const VkDebugReportCallbackCreateInfoEXT* pCreateInfo, const VkAllocationCallbacks* pAllocator, VkDebugReportCallbackEXT* pCallback);
 VKAPI_ATTR void DestroyDebugReportCallbackEXT(VkInstance instance, VkDebugReportCallbackEXT callback, const VkAllocationCallbacks* pAllocator);
 VKAPI_ATTR void DebugReportMessageEXT(VkInstance instance, VkDebugReportFlagsEXT flags, VkDebugReportObjectTypeEXT objectType, uint64_t object, size_t location, int32_t messageCode, const char* pLayerPrefix, const char* pMessage);