（四十一） Android O SystemServer初探
前言：最近在处理anr故障的时候看log的第一行总是显示systemserver占据了多少，systemserver到底是什么呢，学习一下=-=
参考博客：https://blog.csdn.net/tfygg/article/details/52102009
源码分析：Android O
1. SystemServer启动简介
“ SystemServer的在Android体系中所处的地位，SystemServer由Zygote fork生成的，是zygote孵化出的第一个进程，该进程是从ZygoteInit.java的main()函数中调用 startSystemServer()开始的。与启动普通进程的差别在于，zygote类为启动SystemServer提供了专门的函数 startSystemServer()，而不是使用标准的forAndSpecilize()函数，同时，SystemServer进程启动后首先要做 的事情和普通进程也有所差别。”
Zygote不是很熟，其实我只要知道SystemSever是由Zygote启动起来，启动后就会调用自己的main()方法就好了，这是我关注的重点。
2. SystemServer重要功能梳理
我们知道systemserver启动后的入口是自己的main()方法，那就从这里开始吧~
2.1 main
/**
* The main entry point from zygote.
*/
public static void main(String[] args) {
new SystemServer().run();
}没啥好看的，继续看run()方法
2.2 run
方法体比较长，只选择重要的梳理
public SystemServer() {
// Check for factory test mode.
mFactoryTestMode = FactoryTest.getMode();
// Remember if it's runtime restart(when sys.boot_completed is already set) or reboot
mRuntimeRestart = "1".equals(SystemProperties.get("sys.boot_completed"));
}
private void run() {
try {
traceBeginAndSlog("InitBeforeStartServices");
// If a device's clock is before 1970 (before 0), a lot of
// APIs crash dealing with negative numbers, notably
// java.io.File#setLastModified, so instead we fake it and
// hope that time from cell towers or NTP fixes it shortly.
if (System.currentTimeMillis() < EARLIEST_SUPPORTED_TIME) {
Slog.w(TAG, "System clock is before 1970; setting to 1970.");
SystemClock.setCurrentTimeMillis(EARLIEST_SUPPORTED_TIME);
}
//
// Default the timezone property to GMT if not set.
//
String timezoneProperty = SystemProperties.get("persist.sys.timezone");
if (timezoneProperty == null || timezoneProperty.isEmpty()) {
Slog.w(TAG, "Timezone not set; setting to GMT.");
SystemProperties.set("persist.sys.timezone", "GMT");
}
// If the system has "persist.sys.language" and friends set, replace them with
// "persist.sys.locale". Note that the default locale at this point is calculated
// using the "-Duser.locale" command line flag. That flag is usually populated by
// AndroidRuntime using the same set of system properties, but only the system_server
// and system apps are allowed to set them.
//
// NOTE: Most changes made here will need an equivalent change to
// core/jni/AndroidRuntime.cpp
if (!SystemProperties.get("persist.sys.language").isEmpty()) {
final String languageTag = Locale.getDefault().toLanguageTag();
SystemProperties.set("persist.sys.locale", languageTag);
SystemProperties.set("persist.sys.language", "");
SystemProperties.set("persist.sys.country", "");
SystemProperties.set("persist.sys.localevar", "");
}
// The system server should never make non-oneway calls
Binder.setWarnOnBlocking(true);
// Here we go!
Slog.i(TAG, "Entered the Android system server!");
int uptimeMillis = (int) SystemClock.elapsedRealtime();
EventLog.writeEvent(EventLogTags.BOOT_PROGRESS_SYSTEM_RUN, uptimeMillis);
if (!mRuntimeRestart) {
MetricsLogger.histogram(null, "boot_system_server_init", uptimeMillis);
}
// In case the runtime switched since last boot (such as when
// the old runtime was removed in an OTA), set the system
// property so that it is in sync. We can | xq oqi't do this in
// libnativehelper's JniInvocation::Init code where we already
// had to fallback to a different runtime because it is
// running as root and we need to be the system user to set
// the property. http://b/11463182
SystemProperties.set("persist.sys.dalvik.vm.lib.2", VMRuntime.getRuntime().vmLibrary());
// Mmmmmm... more memory!
VMRuntime.getRuntime().clearGrowthLimit();
// The system server has to run all of the time, so it needs to be
// as efficient as possible with its memory usage.
VMRuntime.getRuntime().setTargetHeapUtilization(0.8f);
// Some devices rely on runtime fingerprint generation, so make sure
// we've defined it before booting further.
Build.ensureFingerprintProperty();
// Within the system server, it is an error to access Environment paths without
// explicitly specifying a user.
Environment.setUserRequired(true);
// Within the system server, any incoming Bundles should be defused
// to avoid throwing BadParcelableException.
BaseBundle.setShouldDefuse(true);
// Ensure binder calls into the system always run at foreground priority.
BinderInternal.disableBackgroundScheduling(true);
// Increase the number of binder threads in system_server
BinderInternal.setMaxThreads(sMaxBinderThreads);
// Prepare the main looper thread (this thread).
android.os.Process.setThreadPriority(
android.os.Process.THREAD_PRIORITY_FOREGROUND);
android.os.Process.setCanSelfBackground(false);
Looper.prepareMainLooper();
// Initialize native services.
System.loadLibrary("android_servers");
// Check whether we failed to shut down last time we tried.
// This call may not return.
performPendingShutdown();
// Initialize the system context.
createSystemContext();
// Create the system service manager.
mSystemServiceManager = new SystemServiceManager(mSystemContext);
mSystemServiceManager.setRuntimeRestarted(mRuntimeRestart);
LocalServices.addService(SystemServiceManager.class, mSystemServiceManager);
// Prepare the thread pool for init tasks that can be parallelized
SystemServerInitThreadPool.get();
} finally {
traceEnd(); // InitBeforeStartServices
}
// Start services.
try {
traceBeginAndSlog("StartServices");
startBootstrapServices();
startCoreServices();
startOtherServices();
SystemServerInitThreadPool.shutdown();
} catch (Throwable ex) {
Slog.e("System", "******************************************");
Slog.e("System", "************ Failure starting system services", ex);
throw ex;
} finally {
traceEnd();
}
// For debug builds, log event loop stalls to dropbox for analysis.
if (StrictMode.conditionallyEnableDebugLogging()) {
Slog.i(TAG, "Enabled StrictMode for system server main thread.");
}
if (!mRuntimeRestart && !isFirstBootOrUpgrade()) {
int uptimeMillis = (int) SystemClock.elapsedRealtime();
MetricsLogger.histogram(null, "boot_system_server_ready", uptimeMillis);
final int MAX_UPTIME_MILLIS = 60 * 1000;
if (uptimeMillis > MAX_UPTIME_MILLIS) {
Slog.wtf(SYSTEM_SERVER_TIMING_TAG,
"SystemServer init took too long. uptimeMillis=" + uptimeMillis);
}
}
// Loop forever.
Looper.loop();
throw new RuntimeException("Main thread loop unexpectedly exited");
}有点长，但是基本来看逻辑方面的不多，主要是一些配置项，依据参考文章和自己的看法挑比较重要的梳理下。
2.2.1 createSystemContext
简单梳理下代码流程
private void createSystemContext() {
ActivityThread activityThread = ActivityThread.systemMain();
mSystemContext = activityThread.getSystemContext();
mSystemContext.setTheme(DEFAULT_SYSTEM_THEME);
final Context systemUiContext = activityThread.getSystemUiContext();
systemUiContext.setTheme(DEFAULT_SYSTEM_THEME);
}
public ContextImpl getSystemContext() {
synchronized (this) {
if (mSystemContext == null) {
mSystemContext = ContextImpl.createSystemContext(this);
}
return mSystemContext;
}
}
static ContextImpl createSystemContext(ActivityThread mainThread) {
LoadedApk loadedApk = new LoadedApk(mainThread);
ContextImpl context = new ContextImpl(null, mainThread, loadedApk, null, null, null, 0,
null);
context.setResources(loadedApk.getResources());
context.mResources.updateConfiguration(context.mResourcesManager.getConfiguration(),
context.mResourcesManager.getDisplayMetrics());
return context;
} try {
mInstrumentation = new Instrumentation();
ContextImpl context = ContextImpl.createAppContext(
this, getSystemContext().mLoadedApk);
mInitialApplication = context.mLoadedApk.makeApplication(true, null);
mInitialApplication.onCreate();
} catch (Exception e) {
throw new RuntimeException(
"Unable to instantiate Application():" + e.toString(), e);
}
这里用ContextImpl.createAppContext()创建一个ContextImpl，接着调用context.mPackageInfo.makeApplication(true, null)创建该应用的Application对象，并调用该Application的onCreate()方法：这里启动了一个包名为android的系统应用程序。
2.2.2 SystemServiceManager
// Create the system service manager.
mSystemServiceManager = new SystemServiceManager(mSystemContext);
mSystemServiceManager.setRuntimeRestarted(mRuntimeRestart);
LocalServices.addService(SystemServiceManager.class, mSystemServiceManager); /**
* Starts a service by class name.
*
* @return The service instance.
*/
@SuppressWarnings("unchecked")
public SystemService startService(String className) {
final Class serviceClass;
try {
serviceClass = (Class)Class.forName(className);
} catch (ClassNotFoundException ex) {
Slog.i(TAG, "Starting " + className);
throw new RuntimeException("Failed to create service " + className
+ ": service class not found, usually indicates that the caller should "
+ "have called PackageManager.hasSystemFeature() to check whether the "
+ "feature is available on this device before trying to start the "
+ "services that implement it", ex);
}
return startService(serviceClass);
} 2.2.3 startBootstrapServices
里面有我稍微熟悉一点的StartActivityManager和StartPackageManagerService，也就是说am和pm就是在这个方法里被启动起来的。
/**
* Starts the small tangle of critical services that are needed to get
* the system off the ground. These services have complex mutual dependencies
* which is why we initialize them all in one place here. Unless your service
* is also entwined in these dependencies, it should be initialized in one of
* the other functions.
*/
private void startBootstrapServices() {
Slog.i(TAG, "Reading configuration...");
final String TAG_SYSTEM_CONFIG = "ReadingSystemConfig";
traceBeginAndSlog(TAG_SYSTEM_CONFIG);
SystemServerInitThreadPool.get().submit(SystemConfig::getInstance, TAG_SYSTEM_CONFIG);
traceEnd();
// Wait for installd to finish starting up so that it has a chance to
// create critical directories such as /data/user with the appropriate
// permissions. We need this to complete before we initialize other services.
traceBeginAndSlog("StartInstaller");
Installer installer = mSystemServiceManager.startService(Installer.class);
traceEnd();
// In some cases after launching an app we need to access device identifiers,
// therefore register the device identifier policy before the activity manager.
traceBeginAndSlog("DeviceIdentifiersPolicyService");
mSystemServiceManager.startService(DeviceIdentifiersPolicyService.class);
traceEnd();
// Activity manager runs the show.
traceBeginAndSlog("StartActivityManager");
mActivityManagerService = mSystemServiceManager.startService(
ActivityManagerService.Lifecycle.class).getService();
mActivityManagerService.setSystemServiceManager(mSystemServiceManager);
mActivityManagerService.setInstaller(installer);
traceEnd();
// Power manager needs to be started early because other services need it.
// Native daemons may be watching for it to be registered so it must be ready
// to handle incoming binder calls immediately (including being able to verify
// the permissions for those calls).
traceBeginAndSlog("StartPowerManager");
mPowerManagerService = mSystemServiceManager.startService(PowerManagerService.class);
traceEnd();
// Now that the power manager has been started, let the activity manager
// initialize power management features.
traceBeginAndSlog("InitPowerManagement");
mActivityManagerService.initPowerManagement();
traceEnd();
// Bring up recovery system in case a rescue party needs a reboot
if (!SystemProperties.getBoolean("config.disable_noncore", false)) {
traceBeginAndSlog("StartRecoverySystemService");
mSystemServiceManager.startService(RecoverySystemService.class);
traceEnd();
}
// Now that we have the bare essentials of the OS up and running, take
// note that we just booted, which might send out a rescue party if
// we're stuck in a runtime restart loop.
RescueParty.noteBoot(mSystemContext);
// Manages LEDs and display backlight so we need it to bring up the display.
traceBeginAndSlog("StartLightsService");
mSystemServiceManager.startService(LightsService.class);
traceEnd();
// Display manager is needed to provide display metrics before package manager
// starts up.
traceBeginAndSlog("StartDisplayManager");
mDisplayManagerService = mSystemServiceManager.startService(DisplayManagerService.class);
traceEnd();
// We need the default display before we can initialize the package manager.
traceBeginAndSlog("WaitForDisplay");
mSystemServiceManager.startBootPhase(SystemService.PHASE_WAIT_FOR_DEFAULT_DISPLAY);
traceEnd();
// Only run "core" apps if we're encrypting the device.
String cryptState = SystemProperties.get("vold.decrypt");
if (ENCRYPTING_STATE.equals(cryptState)) {
Slog.w(TAG, "Detected encryption in progress - only parsing core apps");
mOnlyCore = true;
} else if (ENCRYPTED_STATE.equals(cryptState)) {
Slog.w(TAG, "Device encrypted - only parsing core apps");
mOnlyCore = true;
}
// Start the package manager.
if (!mRuntimeRestart) {
MetricsLogger.histogram(null, "boot_package_manager_init_start",
(int) SystemClock.elapsedRealtime());
}
traceBeginAndSlog("StartPackageManagerService");
mPackageManagerService = PackageManagerService.main(mSystemContext, installer,
mFactoryTestMode != FactoryTest.FACTORY_TEST_OFF, mOnlyCore);
mFirstBoot = mPackageManagerService.isFirstBoot();
mPackageManager = mSystemContext.getPackageManager();
traceEnd();
if (!mRuntimeRestart && !isFirstBootOrUpgrade()) {
MetricsLogger.histogram(null, "boot_package_manager_init_ready",
(int) SystemClock.elapsedRealtime());
}
// Manages A/B OTA dexopting. This is a bootstrap service as we need it to rename
// A/B artifacts after boot, before anything else might touch/need them.
// Note: this isn't needed during decryption (we don't have /data anyways).
if (!mOnlyCore) {
boolean disableOtaDexopt = SystemProperties.getBoolean("config.disable_otadexopt",
false);
if (!disableOtaDexopt) {
traceBeginAndSlog("StartOtaDexOptService");
try {
OtaDexoptService.main(mSystemContext, mPackageManagerService);
} catch (Throwable e) {
reportWtf("starting OtaDexOptService", e);
} finally {
traceEnd();
}
}
}
traceBeginAndSlog("StartUserManagerService");
mSystemServiceManager.startService(UserManagerService.LifeCycle.class);
traceEnd();
// Initialize attribute cache used to cache resources from packages.
traceBeginAndSlog("InitAttributerCache");
AttributeCache.init(mSystemContext);
traceEnd();
// Set up the Application instance for the system process and get started.
traceBeginAndSlog("SetSystemProcess");
mActivityManagerService.setSystemProcess();
traceEnd();
// DisplayManagerService needs to setup android.display scheduling related policies
// since setSystemProcess() would have overridden policies due to setProcessGroup
mDisplayManagerService.setupSchedulerPolicies();
// Manages Overlay packages
traceBeginAndSlog("StartOverlayManagerService");
mSystemServiceManager.startService(new OverlayManagerService(mSystemContext, installer));
traceEnd();
// The sensor service needs access to package manager service, app ops
// service, and permissions service, therefore we start it after them.
// Start sensor service in a separate thread. Completion should be checked
// before using it.
mSensorServiceStart = SystemServerInitThreadPool.get().submit(() -> {
TimingsTraceLog traceLog = new TimingsTraceLog(
SYSTEM_SERVER_TIMING_ASYNC_TAG, Trace.TRACE_TAG_SYSTEM_SERVER);
traceLog.traceBegin(START_SENSOR_SERVICE);
startSensorService();
traceLog.traceEnd();
}, START_SENSOR_SERVICE);
}2.2.4 startCoreServices
感觉是为bootstrap的补充
/**
* Starts some essential services that are not tangled up in the bootstrap process.
*/
private void startCoreServices() {
// Records errors and logs, for example wtf()
traceBeginAndSlog("StartDropBoxManager");
mSystemServiceManager.startService(DropBoxManagerService.class);
traceEnd();
traceBeginAndSlog("StartBatteryService");
// Tracks the battery level. Requires LightService.
mSystemServiceManager.startService(BatteryService.class);
traceEnd();
// Tracks application usage stats.
traceBeginAndSlog("StartUsageService");
mSystemServiceManager.startService(UsageStatsService.class);
mActivityManagerService.setUsageStatsManager(
LocalServices.getService(UsageStatsManagerInternal.class));
traceEnd();
// Tracks whether the updatable WebView is in a ready state and watches for update installs.
traceBeginAndSlog("StartWebViewUpdateService");
mWebViewUpdateService = mSystemServiceManager.startService(WebViewUpdateService.class);
traceEnd();
}2.2.5 startOtherServices
1）比较熟的Service：BluetoothService、StartAccessibilityManagerService（无障碍）、StartStorageManagerService、StartDevicePolicyManager、StartNetworkScoreService、StartWifi、StartWifiScanning、StartWifiP2P、StartNotificationManager、StartLocationManagerService、StartUsbService、StartNightDisplay、StartNetworkTimeUpdateService)
2）观察到后半部分有调用startBootPhase和systemReady、systemRunning来进行Service的初始化，包括am和pm
3）另外有观察到systemUi被用startSystemUi(context, windowManagerF)调起来了
4） watchdog.init and Watchdog.getInstance().start();
/**
* Starts a miscellaneous grab bag of stuff that has yet to be refactored
* and organized.
*/
private void startOtherServices() {
final Context context = mSystemContext;
VibratorService vibrator = null;
IStorageManager storageManager = null;
NetworkManagementService networkManagement = null;
IpSecService ipSecService = null;
NetworkStatsService networkStats = null;
NetworkPolicyManagerService networkPolicy = null;
ConnectivityService connectivity = null;
NetworkScoreService networkScore = null;
NsdService serviceDiscovery= null;
WindowManagerService wm = null;
SerialService serial = null;
NetworkTimeUpdateService networkTimeUpdater = null;
CommonTimeManagementService commonTimeMgmtService = null;
InputManagerService inputManager = null;
TelephonyRegistry telephonyRegistry = null;
ConsumerIrService consumerIr = null;
MmsServiceBroker mmsService = null;
HardwarePropertiesManagerService hardwarePropertiesService = null;
boolean disableStorage = SystemProperties.getBoolean("config.disable_storage", false);
boolean disableBluetooth = SystemProperties.getBoolean("config.disable_bluetooth", false);
boolean disableLocation = SystemProperties.getBoolean("config.disable_location", false);
boolean disableSystemUI = SystemProperties.getBoolean("config.disable_systemui", false);
boolean disableNonCoreServices = SystemProperties.getBoolean("config.disable_noncore", false);
boolean disableNetwork = SystemProperties.getBoolean("config.disable_network", false);
boolean disableNetworkTime = SystemProperties.getBoolean("config.disable_networktime", false);
boolean disableRtt = SystemProperties.getBoolean("config.disable_rtt", false);
boolean disableMediaProjection = SystemProperties.getBoolean("config.disable_mediaproj",
false);
boolean disableSerial = SystemProperties.getBoolean("config.disable_serial", false);
boolean disableSearchManager = SystemProperties.getBoolean("config.disable_searchmanager",
false);
boolean disableTrustManager = SystemProperties.getBoolean("config.disable_trustmanager",
false);
boolean disableTextServices = SystemProperties.getBoolean("config.disable_textservices",
false);
boolean disableConsumerIr = SystemProperties.getBoolean("config.disable_consumerir", false);
boolean disableVrManager = SystemProperties.getBoolean("config.disable_vrmanager", false);
boolean disableCameraService = SystemProperties.getBoolean("config.disable_cameraservice",
false);
boolean enableLeftyService = SystemProperties.getBoolean("config.enable_lefty", false);
boolean isEmulator = SystemProperties.get("ro.kernel.qemu").equals("1");
// For debugging RescueParty
if (Build.IS_DEBUGGABLE && SystemProperties.getBoolean("debug.crash_system", false)) {
throw new RuntimeException();
}
try {
final String SECONDARY_ZYGOTE_PRELOAD = "SecondaryZygotePreload";
// We start the preload ~1s before the webview factory preparation, to
// ensure that it completes before the 32 bit relro process is forked
// from the zygote. In the event that it takes too long, the webview
// RELRO process will block, but it will do so without holding any locks.
mZygotePreload = SystemServerInitThreadPool.get().submit(() -> {
try {
Slog.i(TAG, SECONDARY_ZYGOTE_PRELOAD);
TimingsTraceLog traceLog = new TimingsTraceLog(
SYSTEM_SERVER_TIMING_ASYNC_TAG, Trace.TRACE_TAG_SYSTEM_SERVER);
traceLog.traceBegin(SECONDARY_ZYGOTE_PRELOAD);
if (!Process.zygoteProcess.preloadDefault(Build.SUPPORTED_32_BIT_ABIS[0])) {
Slog.e(TAG, "Unable to preload default resources");
}
traceLog.traceEnd();
} catch (Exception ex) {
Slog.e(TAG, "Exception preloading default resources", ex);
}
}, SECONDARY_ZYGOTE_PRELOAD);
traceBeginAndSlog("StartKeyAttestationApplicationIdProviderService");
ServiceManager.addService("sec_key_att_app_id_provider",
new KeyAttestationApplicationIdProviderService(context));
traceEnd();
traceBeginAndSlog("StartKeyChainSystemService");
mSystemServiceManager.startService(KeyChainSystemService.class);
traceEnd();
traceBeginAndSlog("StartSchedulingPolicyService");
ServiceManager.addService("scheduling_policy", new SchedulingPolicyService());
traceEnd();
traceBeginAndSlog("StartTelecomLoaderService");
mSystemServiceManager.startService(TelecomLoaderService.class);
traceEnd();
traceBeginAndSlog("StartTelephonyRegistry");
telephonyRegistry = new TelephonyRegistry(context);
ServiceManager.addService("telephony.registry", telephonyRegistry);
traceEnd();
traceBeginAndSlog("StartEntropyMixer");
mEntropyMixer = new EntropyMixer(context);
traceEnd();
mContentResolver = context.getContentResolver();
// The AccountManager must come before the ContentService
traceBeginAndSlog("StartAccountManagerService");
mSystemServiceManager.startService(ACCOUNT_SERVICE_CLASS);
traceEnd();
traceBeginAndSlog("StartContentService");
mSystemServiceManager.startService(CONTENT_SERVICE_CLASS);
traceEnd();
traceBeginAndSlog("InstallSystemProviders");
mActivityManagerService.installSystemProviders();
traceEnd();
traceBeginAndSlog("StartVibratorService");
vibrator = new VibratorService(context);
ServiceManager.addService("vibrator", vibrator);
traceEnd();
if (!disableConsumerIr) {
traceBeginAndSlog("StartConsumerIrService");
consumerIr = new ConsumerIrService(context);
ServiceManager.addService(Context.CONSUMER_IR_SERVICE, consumerIr);
traceEnd();
}
traceBeginAndSlog("StartAlarmManagerService");
mSystemServiceManager.startService(AlarmManagerService.class);
traceEnd();
traceBeginAndSlog("InitWatchdog");
final Watchdog watchdog = Watchdog.getInstance();
watchdog.init(context, mActivityManagerService);
traceEnd();
traceBeginAndSlog("StartInputManagerService");
inputManager = new InputManagerService(context);
traceEnd();
traceBeginAndSlog("StartWindowManagerService");
// WMS needs sensor service ready
ConcurrentUtils.waitForFutureNoInterrupt(mSensorServiceStart, START_SENSOR_SERVICE);
mSensorServiceStart = null;
wm = WindowManagerService.main(context, inputManager,
mFactoryTestMode != FactoryTest.FACTORY_TEST_LOW_LEVEL,
!mFirstBoot, mOnlyCore, new PhoneWindowManager());
ServiceManager.addService(Context.WINDOW_SERVICE, wm);
ServiceManager.addService(Context.INPUT_SERVICE, inputManager);
traceEnd();
// Start receiving calls from HIDL services. Start in in a separate thread
// because it need to connect to SensorManager. This have to start
// after START_SENSOR_SERVICE is done.
SystemServerInitThreadPool.get().submit(() -> {
TimingsTraceLog traceLog = new TimingsTraceLog(
SYSTEM_SERVER_TIMING_ASYNC_TAG, Trace.TRACE_TAG_SYSTEM_SERVER);
traceLog.traceBegin(START_HIDL_SERVICES);
startHidlServices();
traceLog.traceEnd();
}, START_HIDL_SERVICES);
if (!disableVrManager) {
traceBeginAndSlog("StartVrManagerService");
mSystemServiceManager.startService(VrManagerService.class);
traceEnd();
}
traceBeginAndSlog("SetWindowManagerService");
mActivityManagerService.setWindowManager(wm);
traceEnd();
traceBeginAndSlog("StartInputManager");
inputManager.setWindowManagerCallbacks(wm.getInputMonitor());
inputManager.start();
traceEnd();
// TODO: Use service dependencies instead.
traceBeginAndSlog("DisplayManagerWindowManagerAndInputReady");
mDisplayManagerService.windowManagerAndInputReady();
traceEnd();
// Skip Bluetooth if we have an emulator kernel
// TODO: Use a more reliable check to see if this product should
// support Bluetooth - see bug 988521
if (isEmulator) {
Slog.i(TAG, "No Bluetooth Service (emulator)");
} else if (mFactoryTestMode == FactoryTest.FACTORY_TEST_LOW_LEVEL) {
Slog.i(TAG, "No Bluetooth Service (factory test)");
} else if (!context.getPackageManager().hasSystemFeature
(PackageManager.FEATURE_BLUETOOTH)) {
Slog.i(TAG, "No Bluetooth Service (Bluetooth Hardware Not Present)");
} else if (disableBluetooth) {
Slog.i(TAG, "Bluetooth Service disabled by config");
} else {
traceBeginAndSlog("StartBluetoothService");
mSystemServiceManager.startService(BluetoothService.class);
traceEnd();
}
traceBeginAndSlog("IpConnectivityMetrics");
mSystemServiceManager.startService(IpConnectivityMetrics.class);
traceEnd();
traceBeginAndSlog("PinnerService");
mSystemServiceManager.startService(PinnerService.class);
traceEnd();
} catch (RuntimeException e) {
Slog.e("System", "******************************************");
Slog.e("System", "************ Failure starting core service", e);
}
StatusBarManagerService statusBar = null;
INotificationManager notification = null;
LocationManagerService location = null;
CountryDetectorService countryDetector = null;
ILockSettings lockSettings = null;
MediaRouterService mediaRouter = null;
// Bring up services needed for UI.
if (mFactoryTestMode != FactoryTest.FACTORY_TEST_LOW_LEVEL) {
traceBeginAndSlog("StartInputMethodManagerLifecycle");
mSystemServiceManager.startService(InputMethodManagerService.Lifecycle.class);
traceEnd();
traceBeginAndSlog("StartAccessibilityManagerService");
try {
ServiceManager.addService(Context.ACCESSIBILITY_SERVICE,
new AccessibilityManagerService(context));
} catch (Throwable e) {
reportWtf("starting Accessibility Manager", e);
}
traceEnd();
}
traceBeginAndSlog("MakeDisplayReady");
try {
wm.displayReady();
} catch (Throwable e) {
reportWtf("making display ready", e);
}
traceEnd();
if (mFactoryTestMode != FactoryTest.FACTORY_TEST_LOW_LEVEL) {
if (!disableStorage &&
!"0".equals(SystemProperties.get("system_init.startmountservice"))) {
traceBeginAndSlog("StartStorageManagerService");
try {
/*
* NotificationManagerService is dependant on StorageManagerService,
* (for media / usb notifications) so we must start StorageManagerService first.
*/
mSystemServiceManager.startService(STORAGE_MANAGER_SERVICE_CLASS);
storageManager = IStorageManager.Stub.asInterface(
ServiceManager.getService("mount"));
} catch (Throwable e) {
reportWtf("starting StorageManagerService", e);
}
traceEnd();
traceBeginAndSlog("StartStorageStatsService");
try {
mSystemServiceManager.startService(STORAGE_STATS_SERVICE_CLASS);
} catch (Throwable e) {
reportWtf("starting StorageStatsService", e);
}
traceEnd();
}
}
// We start this here so that we update our configuration to set watch or television
// as appropriate.
traceBeginAndSlog("StartUiModeManager");
mSystemServiceManager.startService(UiModeManagerService.class);
traceEnd();
if (!mOnlyCore) {
traceBeginAndSlog("UpdatePackagesIfNeeded");
try {
mPackageManagerService.updatePackagesIfNeeded();
} catch (Throwable e) {
reportWtf("update packages", e);
}
traceEnd();
}
traceBeginAndSlog("PerformFstrimIfNeeded");
try {
mPackageManagerService.performFstrimIfNeeded();
} catch (Throwable e) {
reportWtf("performing fstrim", e);
}
traceEnd();
if (mFactoryTestMode != FactoryTest.FACTORY_TEST_LOW_LEVEL) {
if (!disableNonCoreServices) {
traceBeginAndSlog("StartLockSettingsService");
try {
mSystemServiceManager.startService(LOCK_SETTINGS_SERVICE_CLASS);
lockSettings = ILockSettings.Stub.asInterface(
ServiceManager.getService("lock_settings"));
} catch (Throwable e) {
reportWtf("starting LockSettingsService service", e);
}
traceEnd();
final boolean hasPdb = !SystemProperties.get(PERSISTENT_DATA_BLOCK_PROP).equals("");
if (hasPdb) {
traceBeginAndSlog("StartPersistentDataBlock");
mSystemServiceManager.startService(PersistentDataBlockService.class);
traceEnd();
}
if (hasPdb || OemLockService.isHalPresent()) {
// Implementation depends on pdb or the OemLock HAL
traceBeginAndSlog("StartOemLockService");
mSystemServiceManager.startService(OemLockService.class);
traceEnd();
}
traceBeginAndSlog("StartDeviceIdleController");
mSystemServiceManager.startService(DeviceIdleController.class);
traceEnd();
// Always start the Device Policy Manager, so that the API is compatible with
// API8.
traceBeginAndSlog("StartDevicePolicyManager");
mSystemServiceManager.startService(DevicePolicyManagerService.Lifecycle.class);
traceEnd();
}
if (!disableSystemUI) {
traceBeginAndSlog("StartStatusBarManagerService");
try {
statusBar = new StatusBarManagerService(context, wm);
ServiceManager.addService(Context.STATUS_BAR_SERVICE, statusBar);
} catch (Throwable e) {
reportWtf("starting StatusBarManagerService", e);
}
traceEnd();
}
if (!disableNonCoreServices) {
traceBeginAndSlog("StartClipboardService");
mSystemServiceManager.startService(ClipboardService.class);
traceEnd();
}
if (!disableNetwork) {
traceBeginAndSlog("StartNetworkManagementService");
try {
networkManagement = NetworkManagementService.create(context);
ServiceManager.addService(Context.NETWORKMANAGEMENT_SERVICE, networkManagement);
} catch (Throwable e) {
reportWtf("starting NetworkManagement Service", e);
}
traceEnd();
traceBeginAndSlog("StartIpSecService");
try {
ipSecService = IpSecService.create(context);
ServiceManager.addService(Context.IPSEC_SERVICE, ipSecService);
} catch (Throwable e) {
reportWtf("starting IpSec Service", e);
}
traceEnd();
}
if (!disableNonCoreServices && !disableTextServices) {
traceBeginAndSlog("StartTextServicesManager");
mSystemServiceManager.startService(TextServicesManagerService.Lifecycle.class);
traceEnd();
}
if (!disableNetwork) {
traceBeginAndSlog("StartNetworkScoreService");
try {
networkScore = new NetworkScoreService(context);
ServiceManager.addService(Context.NETWORK_SCORE_SERVICE, networkScore);
} catch (Throwable e) {
reportWtf("starting Network Score Service", e);
}
traceEnd();
traceBeginAndSlog("StartNetworkStatsService");
try {
networkStats = NetworkStatsService.create(context, networkManagement);
ServiceManager.addService(Context.NETWORK_STATS_SERVICE, networkStats);
} catch (Throwable e) {
reportWtf("starting NetworkStats Service", e);
}
traceEnd();
traceBeginAndSlog("StartNetworkPolicyManagerService");
try {
networkPolicy = new NetworkPolicyManagerService(context,
mActivityManagerService, networkStats, networkManagement);
ServiceManager.addService(Context.NETWORK_POLICY_SERVICE, networkPolicy);
} catch (Throwable e) {
reportWtf("starting NetworkPolicy Service", e);
}
traceEnd();
// Wifi Service must be started first for wifi-related services.
traceBeginAndSlog("StartWifi");
mSystemServiceManager.startService(WIFI_SERVICE_CLASS);
traceEnd();
traceBeginAndSlog("StartWifiScanning");
mSystemServiceManager.startService(
"com.android.server.wifi.scanner.WifiScanningService");
traceEnd();
if (!disableRtt) {
traceBeginAndSlog("StartWifiRtt");
mSystemServiceManager.startService("com.android.server.wifi.RttService");
traceEnd();
}
if (context.getPackageManager().hasSystemFeature(
PackageManager.FEATURE_WIFI_AWARE)) {
traceBeginAndSlog("StartWifiAware");
mSystemServiceManager.startService(WIFI_AWARE_SERVICE_CLASS);
traceEnd();
} else {
Slog.i(TAG, "No Wi-Fi Aware Service (Aware support Not Present)");
}
if (context.getPackageManager().hasSystemFeature(
PackageManager.FEATURE_WIFI_DIRECT)) {
traceBeginAndSlog("StartWifiP2P");
mSystemServiceManager.startService(WIFI_P2P_SERVICE_CLASS);
traceEnd();
}
if (context.getPackageManager().hasSystemFeature(
PackageManager.FEATURE_LOWPAN)) {
traceBeginAndSlog("StartLowpan");
mSystemServiceManager.startService(LOWPAN_SERVICE_CLASS);
traceEnd();
}
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_ETHERNET) ||
mPackageManager.hasSystemFeature(PackageManager.FEATURE_USB_HOST)) {
traceBeginAndSlog("StartEthernet");
mSystemServiceManager.startService(ETHERNET_SERVICE_CLASS);
traceEnd();
}
traceBeginAndSlog("StartConnectivityService");
try {
connectivity = new ConnectivityService(
context, networkManagement, networkStats, networkPolicy);
ServiceManager.addService(Context.CONNECTIVITY_SERVICE, connectivity);
networkStats.bindConnectivityManager(connectivity);
networkPolicy.bindConnectivityManager(connectivity);
} catch (Throwable e) {
reportWtf("starting Connectivity Service", e);
}
traceEnd();
traceBeginAndSlog("StartNsdService");
try {
serviceDiscovery = NsdService.create(context);
ServiceManager.addService(
Context.NSD_SERVICE, serviceDiscovery);
} catch (Throwable e) {
reportWtf("starting Service Discovery Service", e);
}
traceEnd();
}
if (!disableNonCoreServices) {
traceBeginAndSlog("StartUpdateLockService");
try {
ServiceManager.addService(Context.UPDATE_LOCK_SERVICE,
new UpdateLockService(context));
} catch (Throwable e) {
reportWtf("starting UpdateLockService", e);
}
traceEnd();
}
/*
* StorageManagerService has a few dependencies: Notification Manager and
* AppWidget Provider. Make sure StorageManagerService is completely started
* first before continuing.
*/
if (storageManager != null && !mOnlyCore) {
traceBeginAndSlog("WaitForAsecScan");
try {
storageManager.waitForAsecScan();
} catch (RemoteException ignored) {
}
traceEnd();
}
traceBeginAndSlog("StartNotificationManager");
mSystemServiceManager.startService(NotificationManagerService.class);
SystemNotificationChannels.createAll(context);
notification = INotificationManager.Stub.asInterface(
ServiceManager.getService(Context.NOTIFICATION_SERVICE));
networkPolicy.bindNotificationManager(notification);
traceEnd();
traceBeginAndSlog("StartDeviceMonitor");
mSystemServiceManager.startService(DeviceStorageMonitorService.class);
traceEnd();
if (!disableLocation) {
traceBeginAndSlog("StartLocationManagerService");
try {
location = new LocationManagerService(context);
ServiceManager.addService(Context.LOCATION_SERVICE, location);
} catch (Throwable e) {
reportWtf("starting Location Manager", e);
}
traceEnd();
traceBeginAndSlog("StartCountryDetectorService");
try {
countryDetector = new CountryDetectorService(context);
ServiceManager.addService(Context.COUNTRY_DETECTOR, countryDetector);
} catch (Throwable e) {
reportWtf("starting Country Detector", e);
}
traceEnd();
}
if (!disableNonCoreServices && !disableSearchManager) {
traceBeginAndSlog("StartSearchManagerService");
try {
mSystemServiceManager.startService(SEARCH_MANAGER_SERVICE_CLASS);
} catch (Throwable e) {
reportWtf("starting Search Service", e);
}
traceEnd();
}
if (!disableNonCoreServices && context.getResources().getBoolean(
R.bool.config_enableWallpaperService)) {
traceBeginAndSlog("StartWallpaperManagerService");
mSystemServiceManager.startService(WALLPAPER_SERVICE_CLASS);
traceEnd();
}
traceBeginAndSlog("StartAudioService");
mSystemServiceManager.startService(AudioService.Lifecycle.class);
traceEnd();
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_BROADCAST_RADIO)) {
traceBeginAndSlog("StartBroadcastRadioService");
mSystemServiceManager.startService(BroadcastRadioService.class);
traceEnd();
}
if (!disableNonCoreServices) {
traceBeginAndSlog("StartDockObserver");
mSystemServiceManager.startService(DockObserver.class);
traceEnd();
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_WATCH)) {
traceBeginAndSlog("StartThermalObserver");
mSystemServiceManager.startService(THERMAL_OBSERVER_CLASS);
traceEnd();
}
}
traceBeginAndSlog("StartWiredAccessoryManager");
try {
// Listen for wired headset changes
inputManager.setWiredAccessoryCallbacks(
new WiredAccessoryManager(context, inputManager));
} catch (Throwable e) {
reportWtf("starting WiredAccessoryManager", e);
}
traceEnd();
if (!disableNonCoreServices) {
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_MIDI)) {
// Start MIDI Manager service
traceBeginAndSlog("StartMidiManager");
mSystemServiceManager.startService(MIDI_SERVICE_CLASS);
traceEnd();
}
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_USB_HOST)
|| mPackageManager.hasSystemFeature(
PackageManager.FEATURE_USB_ACCESSORY)) {
// Manage USB host and device support
traceBeginAndSlog("StartUsbService");
mSystemServiceManager.startService(USB_SERVICE_CLASS);
traceEnd();
}
if (!disableSerial) {
traceBeginAndSlog("StartSerialService");
try {
// Serial port support
serial = new SerialService(context);
ServiceManager.addService(Context.SERIAL_SERVICE, serial);
} catch (Throwable e) {
Slog.e(TAG, "Failure starting SerialService", e);
}
traceEnd();
}
traceBeginAndSlog("StartHardwarePropertiesManagerService");
try {
hardwarePropertiesService = new HardwarePropertiesManagerService(context);
ServiceManager.addService(Context.HARDWARE_PROPERTIES_SERVICE,
hardwarePropertiesService);
} catch (Throwable e) {
Slog.e(TAG, "Failure starting HardwarePropertiesManagerService", e);
}
traceEnd();
}
traceBeginAndSlog("StartTwilightService");
mSystemServiceManager.startService(TwilightService.class);
traceEnd();
if (NightDisplayController.isAvailable(context)) {
traceBeginAndSlog("StartNightDisplay");
mSystemServiceManager.startService(NightDisplayService.class);
traceEnd();
}
traceBeginAndSlog("StartJobScheduler");
mSystemServiceManager.startService(JobSchedulerService.class);
traceEnd();
traceBeginAndSlog("StartSoundTrigger");
mSystemServiceManager.startService(SoundTriggerService.class);
traceEnd();
if (!disableNonCoreServices) {
if (!disableTrustManager) {
traceBeginAndSlog("StartTrustManager");
mSystemServiceManager.startService(TrustManagerService.class);
traceEnd();
}
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_BACKUP)) {
traceBeginAndSlog("StartBackupManager");
mSystemServiceManager.startService(BACKUP_MANAGER_SERVICE_CLASS);
traceEnd();
}
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_APP_WIDGETS)
|| context.getResources().getBoolean(R.bool.config_enableAppWidgetService)) {
traceBeginAndSlog("StartAppWidgerService");
mSystemServiceManager.startService(APPWIDGET_SERVICE_CLASS);
traceEnd();
}
// We need to always start this service, regardless of whether the
// FEATURE_VOICE_RECOGNIZERS feature is set, because it needs to take care
// of initializing various settings. It will internally modify its behavior
// based on that feature.
traceBeginAndSlog("StartVoiceRecognitionManager");
mSystemServiceManager.startService(VOICE_RECOGNITION_MANAGER_SERVICE_CLASS);
traceEnd();
if (GestureLauncherService.isGestureLauncherEnabled(context.getResources())) {
traceBeginAndSlog("StartGestureLauncher");
mSystemServiceManager.startService(GestureLauncherService.class);
traceEnd();
}
traceBeginAndSlog("StartSensorNotification");
mSystemServiceManager.startService(SensorNotificationService.class);
traceEnd();
traceBeginAndSlog("StartContextHubSystemService");
mSystemServiceManager.startService(ContextHubSystemService.class);
traceEnd();
}
traceBeginAndSlog("StartDiskStatsService");
try {
ServiceManager.addService("diskstats", new DiskStatsService(context));
} catch (Throwable e) {
reportWtf("starting DiskStats Service", e);
}
traceEnd();
// timezone.RulesManagerService will prevent a device starting up if the chain of trust
// required for safe time zone updates might be broken. RuleManagerService cannot do
// this check when mOnlyCore == true, so we don't enable the service in this case.
// This service requires that JobSchedulerService is already started when it starts.
final boolean startRulesManagerService =
!mOnlyCore && context.getResources().getBoolean(
R.bool.config_enableUpdateableTimeZoneRules);
if (startRulesManagerService) {
traceBeginAndSlog("StartTimeZoneRulesManagerService");
mSystemServiceManager.startService(TIME_ZONE_RULES_MANAGER_SERVICE_CLASS);
traceEnd();
}
if (!disableNetwork && !disableNetworkTime) {
traceBeginAndSlog("StartNetworkTimeUpdateService");
try {
networkTimeUpdater = new NetworkTimeUpdateService(context);
ServiceManager.addService("network_time_update_service", networkTimeUpdater);
} catch (Throwable e) {
reportWtf("starting NetworkTimeUpdate service", e);
}
traceEnd();
}
traceBeginAndSlog("StartCommonTimeManagementService");
try {
commonTimeMgmtService = new CommonTimeManagementService(context);
ServiceManager.addService("commontime_management", commonTimeMgmtService);
} catch (Throwable e) {
reportWtf("starting CommonTimeManagementService service", e);
}
traceEnd();
if (!disableNetwork) {
traceBeginAndSlog("CertBlacklister");
try {
CertBlacklister blacklister = new CertBlacklister(context);
} catch (Throwable e) {
reportWtf("starting CertBlacklister", e);
}
traceEnd();
}
if (!disableNetwork && !disableNonCoreServices && EmergencyAffordanceManager.ENABLED) {
// EmergencyMode service
traceBeginAndSlog("StartEmergencyAffordanceService");
mSystemServiceManager.startService(EmergencyAffordanceService.class);
traceEnd();
}
if (!disableNonCoreServices) {
// Dreams (interactive idle-time views, a/k/a screen savers, and doze mode)
traceBeginAndSlog("StartDreamManager");
mSystemServiceManager.startService(DreamManagerService.class);
traceEnd();
}
if (!disableNonCoreServices) {
traceBeginAndSlog("AddGraphicsStatsService");
ServiceManager.addService(GraphicsStatsService.GRAPHICS_STATS_SERVICE,
new GraphicsStatsService(context));
traceEnd();
}
if (!disableNonCoreServices && CoverageService.ENABLED) {
traceBeginAndSlog("AddCoverageService");
ServiceManager.addService(CoverageService.COVERAGE_SERVICE, new CoverageService());
traceEnd();
}
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_PRINTING)) {
traceBeginAndSlog("StartPrintManager");
mSystemServiceManager.startService(PRINT_MANAGER_SERVICE_CLASS);
traceEnd();
}
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_COMPANION_DEVICE_SETUP)) {
traceBeginAndSlog("StartCompanionDeviceManager");
mSystemServiceManager.startService(COMPANION_DEVICE_MANAGER_SERVICE_CLASS);
traceEnd();
}
traceBeginAndSlog("StartRestrictionManager");
mSystemServiceManager.startService(RestrictionsManagerService.class);
traceEnd();
traceBeginAndSlog("StartMediaSessionService");
mSystemServiceManager.startService(MediaSessionService.class);
traceEnd();
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_HDMI_CEC)) {
traceBeginAndSlog("StartHdmiControlService");
mSystemServiceManager.startService(HdmiControlService.class);
traceEnd();
}
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_LIVE_TV)
|| mPackageManager.hasSystemFeature(PackageManager.FEATURE_LEANBACK)) {
traceBeginAndSlog("StartTvInputManager");
mSystemServiceManager.startService(TvInputManagerService.class);
traceEnd();
}
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_PICTURE_IN_PICTURE)) {
traceBeginAndSlog("StartMediaResourceMonitor");
mSystemServiceManager.startService(MediaResourceMonitorService.class);
traceEnd();
}
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_LEANBACK)) {
traceBeginAndSlog("StartTvRemoteService");
mSystemServiceManager.startService(TvRemoteService.class);
traceEnd();
}
if (!disableNonCoreServices) {
traceBeginAndSlog("StartMediaRouterService");
try {
mediaRouter = new MediaRouterService(context);
ServiceManager.addService(Context.MEDIA_ROUTER_SERVICE, mediaRouter);
} catch (Throwable e) {
reportWtf("starting MediaRouterService", e);
}
traceEnd();
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_FINGERPRINT)) {
traceBeginAndSlog("StartFingerprintSensor");
mSystemServiceManager.startService(FingerprintService.class);
traceEnd();
}
traceBeginAndSlog("StartBackgroundDexOptService");
try {
BackgroundDexOptService.schedule(context);
} catch (Throwable e) {
reportWtf("starting StartBackgroundDexOptService", e);
}
traceEnd();
traceBeginAndSlog("StartPruneInstantAppsJobService");
try {
PruneInstantAppsJobService.schedule(context);
} catch (Throwable e) {
reportWtf("StartPruneInstantAppsJobService", e);
}
traceEnd();
}
// LauncherAppsService uses ShortcutService.
traceBeginAndSlog("StartShortcutServiceLifecycle");
mSystemServiceManager.startService(ShortcutService.Lifecycle.class);
traceEnd();
traceBeginAndSlog("StartLauncherAppsService");
mSystemServiceManager.startService(LauncherAppsService.class);
traceEnd();
}
if (!disableNonCoreServices && !disableMediaProjection) {
traceBeginAndSlog("StartMediaProjectionManager");
mSystemServiceManager.startService(MediaProjectionManagerService.class);
traceEnd();
}
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_WATCH)) {
traceBeginAndSlog("StartWearConnectivityService");
mSystemServiceManager.startService(WEAR_CONNECTIVITY_SERVICE_CLASS);
traceEnd();
if (!disableNonCoreServices) {
traceBeginAndSlog("StartWearTimeService");
mSystemServiceManager.startService(WEAR_DISPLAY_SERVICE_CLASS);
mSystemServiceManager.startService(WEAR_TIME_SERVICE_CLASS);
traceEnd();
if (enableLeftyService) {
traceBeginAndSlog("StartWearLeftyService");
mSystemServiceManager.startService(WEAR_LEFTY_SERVICE_CLASS);
traceEnd();
}
}
}
if (!disableCameraService) {
traceBeginAndSlog("StartCameraServiceProxy");
mSystemServiceManager.startService(CameraServiceProxy.class);
traceEnd();
}
// Before things start rolling, be sure we have decided whether
// we are in safe mode.
final boolean safeMode = wm.detectSafeMode();
if (safeMode) {
traceBeginAndSlog("EnterSafeModeAndDisableJitCompilation");
mActivityManagerService.enterSafeMode();
// Disable the JIT for the system_server process
VMRuntime.getRuntime().disableJitCompilation();
traceEnd();
} else {
// Enable the JIT for the system_server process
traceBeginAndSlog("StartJitCompilation");
VMRuntime.getRuntime().startJitCompilation();
traceEnd();
}
// MMS service broker
traceBeginAndSlog("StartMmsService");
mmsService = mSystemServiceManager.startService(MmsServiceBroker.class);
traceEnd();
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_AUTOFILL)) {
traceBeginAndSlog("StartAutoFillService");
mSystemServiceManager.startService(AUTO_FILL_MANAGER_SERVICE_CLASS);
traceEnd();
}
// It is now time to start up the app processes...
traceBeginAndSlog("MakeVibratorServiceReady");
try {
vibrator.systemReady();
} catch (Throwable e) {
reportWtf("making Vibrator Service ready", e);
}
traceEnd();
traceBeginAndSlog("MakeLockSettingsServiceReady");
if (lockSettings != null) {
try {
lockSettings.systemReady();
} catch (Throwable e) {
reportWtf("making Lock Settings Service ready", e);
}
}
traceEnd();
// Needed by DevicePolicyManager for initialization
traceBeginAndSlog("StartBootPhaseLockSettingsReady");
mSystemServiceManager.startBootPhase(SystemService.PHASE_LOCK_SETTINGS_READY);
traceEnd();
traceBeginAndSlog("StartBootPhaseSystemServicesReady");
mSystemServiceManager.startBootPhase(SystemService.PHASE_SYSTEM_SERVICES_READY);
traceEnd();
traceBeginAndSlog("MakeWindowManagerServiceReady");
try {
wm.systemReady();
} catch (Throwable e) {
reportWtf("making Window Manager Service ready", e);
}
traceEnd();
if (safeMode) {
mActivityManagerService.showSafeModeOverlay();
}
// Update the configuration for this context by hand, because we're going
// to start using it before the config change done in wm.systemReady() will
// propagate to it.
final Configuration config = wm.computeNewConfiguration(DEFAULT_DISPLAY);
DisplayMetrics metrics = new DisplayMetrics();
WindowManager w = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
w.getDefaultDisplay().getMetrics(metrics);
context.getResources().updateConfiguration(config, metrics);
// The system context's theme may be configuration-dependent.
final Theme systemTheme = context.getTheme();
if (systemTheme.getChangingConfigurations() != 0) {
systemTheme.rebase();
}
traceBeginAndSlog("MakePowerManagerServiceReady");
try {
// TODO: use boot phase
mPowerManagerService.systemReady(mActivityManagerService.getAppOpsService());
} catch (Throwable e) {
reportWtf("making Power Manager Service ready", e);
}
traceEnd();
traceBeginAndSlog("MakePackageManagerServiceReady");
try {
mPackageManagerService.systemReady();
} catch (Throwable e) {
reportWtf("making Package Manager Service ready", e);
}
traceEnd();
traceBeginAndSlog("MakeDisplayManagerServiceReady");
try {
// TODO: use boot phase and communicate these flags some other way
mDisplayManagerService.systemReady(safeMode, mOnlyCore);
} catch (Throwable e) {
reportWtf("making Display Manager Service ready", e);
}
traceEnd();
mSystemServiceManager.setSafeMode(safeMode);
// These are needed to propagate to the runnable below.
final NetworkManagementService networkManagementF = networkManagement;
final NetworkStatsService networkStatsF = networkStats;
final NetworkPolicyManagerService networkPolicyF = networkPolicy;
final ConnectivityService connectivityF = connectivity;
final NetworkScoreService networkScoreF = networkScore;
final LocationManagerService locationF = location;
final CountryDetectorService countryDetectorF = countryDetector;
final NetworkTimeUpdateService networkTimeUpdaterF = networkTimeUpdater;
final CommonTimeManagementService commonTimeMgmtServiceF = commonTimeMgmtService;
final InputManagerService inputManagerF = inputManager;
final TelephonyRegistry telephonyRegistryF = telephonyRegistry;
final MediaRouterService mediaRouterF = mediaRouter;
final MmsServiceBroker mmsServiceF = mmsService;
final IpSecService ipSecServiceF = ipSecService;
final WindowManagerService windowManagerF = wm;
// We now tell the activity manager it is okay to run third party
// code. It will call back into us once it has gotten to the state
// where third party code can really run (but before it has actually
// started launching the initial applications), for us to complete our
// initialization.
mActivityManagerService.systemReady(() -> {
Slog.i(TAG, "Making services ready");
traceBeginAndSlog("StartActivityManagerReadyPhase");
mSystemServiceManager.startBootPhase(
SystemService.PHASE_ACTIVITY_MANAGER_READY);
traceEnd();
traceBeginAndSlog("StartObservingNativeCrashes");
try {
mActivityManagerService.startObservingNativeCrashes();
} catch (Throwable e) {
reportWtf("observing native crashes", e);
}
traceEnd();
// No dependency on Webview preparation in system server. But this should
// be completed before allowring 3rd party
final String WEBVIEW_PREPARATION = "WebViewFactoryPreparation";
Future webviewPrep = null;
if (!mOnlyCore) {
webviewPrep = SystemServerInitThreadPool.get().submit(() -> {
Slog.i(TAG, WEBVIEW_PREPARATION);
TimingsTraceLog traceLog = new TimingsTraceLog(
SYSTEM_SERVER_TIMING_ASYNC_TAG, Trace.TRACE_TAG_SYSTEM_SERVER);
traceLog.traceBegin(WEBVIEW_PREPARATION);
ConcurrentUtils.waitForFutureNoInterrupt(mZygotePreload, "Zygote preload");
mZygotePreload = null;
mWebViewUpdateService.prepareWebViewInSystemServer();
traceLog.traceEnd();
}, WEBVIEW_PREPARATION);
}
if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE)) {
traceBeginAndSlog("StartCarServiceHelperService");
mSystemServiceManager.startService(CarServiceHelperService.class);
traceEnd();
}
traceBeginAndSlog("StartSystemUI");
try {
startSystemUi(context, windowManagerF);
} catch (Throwable e) {
reportWtf("starting System UI", e);
}
traceEnd();
traceBeginAndSlog("MakeNetworkScoreReady");
try {
if (networkScoreF != null) networkScoreF.systemReady();
} catch (Throwable e) {
reportWtf("making Network Score Service ready", e);
}
traceEnd();
traceBeginAndSlog("MakeNetworkManagementServiceReady");
try {
if (networkManagementF != null) networkManagementF.systemReady();
} catch (Throwable e) {
reportWtf("making Network Managment Service ready", e);
}
CountDownLatch networkPolicyInitReadySignal = null;
if (networkPolicyF != null) {
networkPolicyInitReadySignal = networkPolicyF
.networkScoreAndNetworkManagementServiceReady();
}
traceEnd();
traceBeginAndSlog("MakeIpSecServiceReady");
try {
if (ipSecServiceF != null) ipSecServiceF.systemReady();
} catch (Throwable e) {
reportWtf("making IpSec Service ready", e);
}
traceEnd();
traceBeginAndSlog("MakeNetworkStatsServiceReady");
try {
if (networkStatsF != null) networkStatsF.systemReady();
} catch (Throwable e) {
reportWtf("making Network Stats Service ready", e);
}
traceEnd();
traceBeginAndSlog("MakeConnectivityServiceReady");
try {
if (connectivityF != null) connectivityF.systemReady();
} catch (Throwable e) {
reportWtf("making Connectivity Service ready", e);
}
traceEnd();
traceBeginAndSlog("MakeNetworkPolicyServiceReady");
try {
if (networkPolicyF != null) {
networkPolicyF.systemReady(networkPolicyInitReadySignal);
}
} catch (Throwable e) {
reportWtf("making Network Policy Service ready", e);
}
traceEnd();
traceBeginAndSlog("StartWatchdog");
Watchdog.getInstance().start();
traceEnd();
// Wait for all packages to be prepared
mPackageManagerService.waitForAppDataPrepared();
// It is now okay to let the various system services start their
// third party code...
traceBeginAndSlog("PhaseThirdPartyAppsCanStart");
// confirm webview completion before starting 3rd party
if (webviewPrep != null) {
ConcurrentUtils.waitForFutureNoInterrupt(webviewPrep, WEBVIEW_PREPARATION);
}
mSystemServiceManager.startBootPhase(
SystemService.PHASE_THIRD_PARTY_APPS_CAN_START);
traceEnd();
traceBeginAndSlog("MakeLocationServiceReady");
try {
if (locationF != null) locationF.systemRunning();
} catch (Throwable e) {
reportWtf("Notifying Location Service running", e);
}
traceEnd();
traceBeginAndSlog("MakeCountryDetectionServiceReady");
try {
if (countryDetectorF != null) countryDetectorF.systemRunning();
} catch (Throwable e) {
reportWtf("Notifying CountryDetectorService running", e);
}
traceEnd();
traceBeginAndSlog("MakeNetworkTimeUpdateReady");
try {
if (networkTimeUpdaterF != null) networkTimeUpdaterF.systemRunning();
} catch (Throwable e) {
reportWtf("Notifying NetworkTimeService running", e);
}
traceEnd();
traceBeginAndSlog("MakeCommonTimeManagementServiceReady");
try {
if (commonTimeMgmtServiceF != null) {
commonTimeMgmtServiceF.systemRunning();
}
} catch (Throwable e) {
reportWtf("Notifying CommonTimeManagementService running", e);
}
traceEnd();
traceBeginAndSlog("MakeInputManagerServiceReady");
try {
// TODO(BT) Pass parameter to input manager
if (inputManagerF != null) inputManagerF.systemRunning();
} catch (Throwable e) {
reportWtf("Notifying InputManagerService running", e);
}
traceEnd();
traceBeginAndSlog("MakeTelephonyRegistryReady");
try {
if (telephonyRegistryF != null) telephonyRegistryF.systemRunning();
} catch (Throwable e) {
reportWtf("Notifying TelephonyRegistry running", e);
}
traceEnd();
traceBeginAndSlog("MakeMediaRouterServiceReady");
try {
if (mediaRouterF != null) mediaRouterF.systemRunning();
} catch (Throwable e) {
reportWtf("Notifying MediaRouterService running", e);
}
traceEnd();
traceBeginAndSlog("MakeMmsServiceReady");
try {
if (mmsServiceF != null) mmsServiceF.systemRunning();
} catch (Throwable e) {
reportWtf("Notifying MmsService running", e);
}
traceEnd();
traceBeginAndSlog("MakeNetworkScoreServiceReady");
try {
if (networkScoreF != null) networkScoreF.systemRunning();
} catch (Throwable e) {
reportWtf("Notifying NetworkScoreService running", e);
}
traceEnd();
traceBeginAndSlog("IncidentDaemonReady");
try {
// TODO: Switch from checkService to getService once it's always
// in the build and should reliably be there.
final IIncidentManager incident = IIncidentManager.Stub.asInterface(
ServiceManager.checkService("incident"));
if (incident != null) incident.systemRunning();
} catch (Throwable e) {
reportWtf("Notifying incident daemon running", e);
}
traceEnd();
}, BOOT_TIMINGS_TRACE_LOG);PS:
system_server进程中的服务启动方式有两种，分别是SystemServiceManager的startService()和ServiceManager的addService
1）startService通过SystemServiceManager的startService(Class
a、创建serviceClass类对象，将新建对象注册到SystemServiceManager的成员变量mServices;
b、调用新建对象的onStart()方法，即调用serviceClass.onStart()；
c、当系统启动到一个新的阶段Phase时，SystemServiceManager的startBootPhase()会循环遍历所有向SystemServiceManager注册过服务的onBootPhase()方法，即调用serviceClass.onBootPhase()。
例如：mSystemServiceManager.startService(PowerManagerService.class);
2）addService
通过ServiceManager的addService(String name, IBinder service)用于初始化继承于IBinder的服务。主要功能:
a、将该服务向Native层的serviceManager注册服务。
例如：ServiceManager.addService(Context.WINDOW_SERVICE, wm);
3）system_server进程，从源码角度划分为引导服务、核心服务、其他服务3类。引导服务(7个)：ActivityManagerService、PowerManagerService、LightsService、DisplayManagerService、PackageManagerService、UserManagerService、SensorService；
核心服务(3个)：BatteryService、UsageStatsService、WebViewUpdateService；
其他服务(70个+)：AlarmManagerService、VibratorService等。
3.总结
SystemServer可以看成启动所有服务的发起者，我们熟知的有am/pm/蓝牙/WiFi相关服务，并随着Android启动过程的推进完成一些服务的初始化工作。