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【Android车载系列】第10章 系统服务-SystemServer源码分析（API28）
简介【Android车载系列】第10章 系统服务-SystemServer源码分析（API28）
1 SystemServer启动
&emps;&emps;SystemServer进程启动，首先从SystemServer.java文件的main()方法开始。
290 /**
291 * The main entry point from zygote.
292 */
293 public static void main(String[] args) {
294 new SystemServer().run();
295 }
...
307 private void run() {
...
426 // Start services.
427 try {
428 traceBeginAndSlog("StartServices");
429 startBootstrapServices();
430 startCoreServices();
431 startOtherServices();
432 SystemServerInitThreadPool.shutdown();
433 } catch (Throwable ex) {
434 Slog.e("System", "******************************************");
435 Slog.e("System", "************ Failure starting system services", ex);
436 throw ex;
437 } finally {
438 traceEnd();
439 }
...
456 }
从代码中我们能看到main()方法主要调用了SystemServer.run()方法，该方法内做了一些初始化，我们来看下主要的一些初始化点，我们主要来看看这里的服务启动：
428行启动了80多个服务，最重要的是AMS，WMS，PKMS，其中三个方法分别启动不同层的服务：
startBootstrapServices();底层，启动引导服务；
startCoreServices();用户层，启动核心服务；
startOtherServices();应用层，启动其它服务。
1.1 startBootstrapServices() 启动引导服务
下面我们来看一下底层引导服务的启动方法startBootstrapServices()
530 /**
531 * Starts the small tangle of critical services that are needed to get
532 * the system off the ground. These services have complex mutual dependencies
533 * which is why we initialize them all in one place here. Unless your service
534 * is also entwined in these dependencies, it should be initialized in one of
535 * the other functions.
536 */
537 private void startBootstrapServices() {
538 Slog.i(TAG, "Reading configuration...");
539 final String TAG_SYSTEM_CONFIG = "ReadingSystemConfig";
540 traceBeginAndSlog(TAG_SYSTEM_CONFIG);
541 SystemServerInitThreadPool.get().submit(SystemConfig::getInstance, TAG_SYSTEM_CONFIG);
542 traceEnd();
543
544 // Wait for installd to finish starting up so that it has a chance to
545 // create critical directories such as /data/user with the appropriate
546 // permissions. We need this to complete before we initialize other services.
547 traceBeginAndSlog("StartInstaller");
548 Installer installer = mSystemServiceManager.startService(Installer.class);
549 traceEnd();
550
551 // In some cases after launching an app we need to access device identifiers,
552 // therefore register the device identifier policy before the activity manager.
553 traceBeginAndSlog("DeviceIdentifiersPolicyService");
554 mSystemServiceManager.startService(DeviceIdentifiersPolicyService.class);
555 traceEnd();
556
557 // Activity manager runs the show.
558 traceBeginAndSlog("StartActivityManager");
559 mActivityManagerService = mSystemServiceManager.startService(
560 ActivityManagerService.Lifecycle.class).getService();
561 mActivityManagerService.setSystemServiceManager(mSystemServiceManager);
562 mActivityManagerService.setInstaller(installer);
563 traceEnd();
564
565 // Power manager needs to be started early because other services need it.
566 // Native daemons may be watching for it to be registered so it must be ready
567 // to handle incoming binder calls immediately (including being able to verify
568 // the permissions for those calls).
569 traceBeginAndSlog("StartPowerManager");
570 mPowerManagerService = mSystemServiceManager.startService(PowerManagerService.class);
571 traceEnd();
572
573 // Now that the power manager has been started, let the activity manager
574 // initialize power management features.
575 traceBeginAndSlog("InitPowerManagement");
576 mActivityManagerService.initPowerManagement();
577 traceEnd();
578
579 // Bring up recovery system in case a rescue party needs a reboot
580 traceBeginAndSlog("StartRecoverySystemService");
581 mSystemServiceManager.startService(RecoverySystemService.class);
582 traceEnd();
583
584 // Now that we have the bare essentials of the OS up and running, take
585 // note that we just booted, which might send out a rescue party if
586 // we're stuck in a runtime restart loop.
587 RescueParty.noteBoot(mSystemContext);
588
589 // Manages LEDs and display backlight so we need it to bring up the display.
590 traceBeginAndSlog("StartLightsService");
591 mSystemServiceManager.startService(LightsService.class);
592 traceEnd();
593
594 traceBeginAndSlog("StartSidekickService");
595 // Package manager isn't started yet; need to use SysProp not hardware feature
596 if (SystemProperties.getBoolean("config.enable_sidekick_graphics", false)) {
597 mSystemServiceManager.startService(WEAR_SIDEKICK_SERVICE_CLASS);
598 }
599 traceEnd();
600
601 // Display manager is needed to provide display metrics before package manager
602 // starts up.
603 traceBeginAndSlog("StartDisplayManager");
604 mDisplayManagerService = mSystemServiceManager.startService(DisplayManagerService.class);
605 traceEnd();
606
607 // We need the default display before we can initialize the package manager.
608 traceBeginAndSlog("WaitForDisplay");
609 mSystemServiceManager.startBootPhase(SystemService.PHASE_WAIT_FOR_DEFAULT_DISPLAY);
610 traceEnd();
611
612 // Only run "core" apps if we're encrypting the device.
613 String cryptState = SystemProperties.get("vold.decrypt");
614 if (ENCRYPTING_STATE.equals(cryptState)) {
615 Slog.w(TAG, "Detected encryption in progress - only parsing core apps");
616 mOnlyCore = true;
617 } else if (ENCRYPTED_STATE.equals(cryptState)) {
618 Slog.w(TAG, "Device encrypted - only parsing core apps");
619 mOnlyCore = true;
620 }
621
622 // Start the package manager.
623 if (!mRuntimeRestart) {
624 MetricsLogger.histogram(null, "boot_package_manager_init_start",
625 (int) SystemClock.elapsedRealtime());
626 }
627 traceBeginAndSlog("StartPackageManagerService");
628 mPackageManagerService = PackageManagerService.main(mSystemContext, installer,
629 mFactoryTestMode != FactoryTest.FACTORY_TEST_OFF, mOnlyCore);
630 mFirstBoot = mPackageManagerService.isFirstBoot();
631 mPackageManager = mSystemContext.getPackageManager();
632 traceEnd();
633 if (!mRuntimeRestart && !isFirstBootOrUpgrade()) {
634 MetricsLogger.histogram(null, "boot_package_manager_init_ready",
635 (int) SystemClock.elapsedRealtime());
636 }
637 // Manages A/B OTA dexopting. This is a bootstrap service as we need it to rename
638 // A/B artifacts after boot, before anything else might touch/need them.
639 // Note: this isn't needed during decryption (we don't have /data anyways).
640 if (!mOnlyCore) {
641 boolean disableOtaDexopt = SystemProperties.getBoolean("config.disable_otadexopt",
642 false);
643 if (!disableOtaDexopt) {
644 traceBeginAndSlog("StartOtaDexOptService");
645 try {
646 OtaDexoptService.main(mSystemContext, mPackageManagerService);
647 } catch (Throwable e) {
648 reportWtf("starting OtaDexOptService", e);
649 } finally {
650 traceEnd();
651 }
652 }
653 }
654
655 traceBeginAndSlog("StartUserManagerService");
656 mSystemServiceManager.startService(UserManagerService.LifeCycle.class);
657 traceEnd();
658
659 // Initialize attribute cache used to cache resources from packages.
660 traceBeginAndSlog("InitAttributerCache");
661 AttributeCache.init(mSystemContext);
662 traceEnd();
663
664 // Set up the Application instance for the system process and get started.
665 traceBeginAndSlog("SetSystemProcess");
666 mActivityManagerService.setSystemProcess();
667 traceEnd();
668
669 // DisplayManagerService needs to setup android.display scheduling related policies
670 // since setSystemProcess() would have overridden policies due to setProcessGroup
671 mDisplayManagerService.setupSchedulerPolicies();
672
673 // Manages Overlay packages
674 traceBeginAndSlog("StartOverlayManagerService");
675 mSystemServiceManager.startService(new OverlayManagerService(mSystemContext, installer));
676 traceEnd();
677
678 // The sensor service needs access to package manager service, app ops
679 // service, and permissions service, therefore we start it after them.
680 // Start sensor service in a separate thread. Completion should be checked
681 // before using it.
682 mSensorServiceStart = SystemServerInitThreadPool.get().submit(() -> {
683 TimingsTraceLog traceLog = new TimingsTraceLog(
684 SYSTEM_SERVER_TIMING_ASYNC_TAG, Trace.TRACE_TAG_SYSTEM_SERVER);
685 traceLog.traceBegin(START_SENSOR_SERVICE);
686 startSensorService();
687 traceLog.traceEnd();
688 }, START_SENSOR_SERVICE);
689 }
引导服务主要有Installer、DeviceIdentifiersPolicyService、 ActivityManagerService、PowerManagerService、 RecoverySystemService 、 LightsService 、 PackageManagerService、UserManagerService、OverlayManagerService等
1.1.1 SystemServiceManager启动管理服务
Java层80多种服务都是通过SystemServiceManager类完成初始化和管理。下面我们来看一下startService(service)方法代码：
54 /**
55 * Starts a service by class name.
56 *
57 * @return The service instance.
58 */
59 @SuppressWarnings("unchecked")
60 public SystemService startService(String className) {
61 final Class<SystemService> serviceClass;
62 try {
63 serviceClass = (Class<SystemService>)Class.forName(className);
64 } catch (ClassNotFoundException ex) {
65 Slog.i(TAG, "Starting " + className);
66 throw new RuntimeException("Failed to create service " + className
67 + ": service class not found, usually indicates that the caller should "
68 + "have called PackageManager.hasSystemFeature() to check whether the "
69 + "feature is available on this device before trying to start the "
70 + "services that implement it", ex);
71 }
72 return startService(serviceClass);
73 }
74
75 /**
76 * Creates and starts a system service. The class must be a subclass of
77 * {@link com.android.server.SystemService}.
78 *
79 * @param serviceClass A Java class that implements the SystemService interface.
80 * @return The service instance, never null.
81 * @throws RuntimeException if the service fails to start.
82 */
83 @SuppressWarnings("unchecked")
84 public <T extends SystemService> T startService(Class<T> serviceClass) {
85 try {
86 final String name = serviceClass.getName();
87 Slog.i(TAG, "Starting " + name);
88 Trace.traceBegin(Trace.TRACE_TAG_SYSTEM_SERVER, "StartService " + name);
89
90 // Create the service.
91 if (!SystemService.class.isAssignableFrom(serviceClass)) {
92 throw new RuntimeException("Failed to create " + name
93 + ": service must extend " + SystemService.class.getName());
94 }
95 final T service;
96 try {
97 Constructor<T> constructor = serviceClass.getConstructor(Context.class);
98 service = constructor.newInstance(mContext);
99 } catch (InstantiationException ex) {
100 throw new RuntimeException("Failed to create service " + name
101 + ": service could not be instantiated", ex);
102 } catch (IllegalAccessException ex) {
103 throw new RuntimeException("Failed to create service " + name
104 + ": service must have a public constructor with a Context argument", ex);
105 } catch (NoSuchMethodException ex) {
106 throw new RuntimeException("Failed to create service " + name
107 + ": service must have a public constructor with a Context argument", ex);
108 } catch (InvocationTargetException ex) {
109 throw new RuntimeException("Failed to create service " + name
110 + ": service constructor threw an exception", ex);
111 }
112
113 startService(service);
114 return service;
115 } finally {
116 Trace.traceEnd(Trace.TRACE_TAG_SYSTEM_SERVER);
117 }
118 }
119
120 public void startService(@NonNull final SystemService service) {
121 // Register it.
122 mServices.add(service);
123 // Start it.
124 long time = SystemClock.elapsedRealtime();
125 try {
126 service.onStart();
127 } catch (RuntimeException ex) {
128 throw new RuntimeException("Failed to start service " + service.getClass().getName()
129 + ": onStart threw an exception", ex);
130 }
131 warnIfTooLong(SystemClock.elapsedRealtime() - time, service, "onStart");
132 }
1.
SystemServer借助mSystemServiceManager对服务进行启动和管理
2.startService()方法主要通过反射获取service对象，然后将service加到mServices中管理，onStart()启动该服务，onBootPhase(int phase)进行回调阶段状态。
3.启动的AMS、PMS、WMS等服务都是为了APP提供服务，这些服务都不在一个进程，通过aidl--->binder进行通信。
1.1.1.1 生命周期
1.onStart() ：mSystemServiceManager.startService第一时间回调该函数。
2.onBootPhase(int phase) ： 系统启动的各个阶段会回调该函数
SystemService.PHASE_WAIT_FOR_DEFAULT_DISPLAY:这是一个依赖项，只有DisplayManagerService中进行了对应处理；
SystemService.PHASE_LOCK_SETTINGS_READY:经过这个引导阶段后，服务才可以接收到wakelock相关设置数据；
SystemService.PHASE_SYSTEM_SERVICES_READY:经过这个引导阶段 后，服务才可以安全地使用核心系统服务
SystemService.PHASE_ACTIVITY_MANAGER_READY:经过这个引导阶 段后，服务可以发送广播
SystemService.PHASE_THIRD_PARTY_APPS_CAN_START:经过这个引导阶段后，服务可以启动第三方应用，第三方应用也可以通过Binder来调用服务。
SystemService.PHASE_BOOT_COMPLETED:经过这个引导阶段后，说明服务启动完成，这时用户就可以
和设备进行交互。
134 /**
135 * Starts the specified boot phase for all system services that have been started up to
136 * this point.
137 *
138 * @param phase The boot phase to start.
139 */
140 public void startBootPhase(final int phase) {
141 if (phase <= mCurrentPhase) {
142 throw new IllegalArgumentException("Next phase must be larger than previous");
143 }
144 mCurrentPhase = phase;
145
146 Slog.i(TAG, "Starting phase " + mCurrentPhase);
147 try {
148 Trace.traceBegin(Trace.TRACE_TAG_SYSTEM_SERVER, "OnBootPhase " + phase);
149 final int serviceLen = mServices.size();
150 for (int i = 0; i < serviceLen; i++) {
151 final SystemService service = mServices.get(i);
152 long time = SystemClock.elapsedRealtime();
153 Trace.traceBegin(Trace.TRACE_TAG_SYSTEM_SERVER, service.getClass().getName());
154 try {
155 service.onBootPhase(mCurrentPhase);
156 } catch (Exception ex) {
157 throw new RuntimeException("Failed to boot service "
158 + service.getClass().getName()
159 + ": onBootPhase threw an exception during phase "
160 + mCurrentPhase, ex);
161 }
162 warnIfTooLong(SystemClock.elapsedRealtime() - time, service, "onBootPhase");
163 Trace.traceEnd(Trace.TRACE_TAG_SYSTEM_SERVER);
164 }
165 } finally {
166 Trace.traceEnd(Trace.TRACE_TAG_SYSTEM_SERVER);
167 }
168 }
1.1.2 AMS服务初始化
我们看回到startBootstrapServices()方法的559行，AMS服务进行了初始化。我们看到传入的Service类为Lifecycle.class，其实Lifecycle类就是对ActivityManagerService进行了管理，赋予了生命周期。
1.1.2.1 Lifecycle类
2877 public static final class Lifecycle extends SystemService {
2878 private final ActivityManagerService mService;
2879
2880 public Lifecycle(Context context) {
2881 super(context);
2882 mService = new ActivityManagerService(context);
2883 }
2884
2885 @Override
2886 public void onStart() {
2887 mService.start();
2888 }
2889
2890 @Override
2891 public void onBootPhase(int phase) {
2892 mService.mBootPhase = phase;
2893 if (phase == PHASE_SYSTEM_SERVICES_READY) {
2894 mService.mBatteryStatsService.systemServicesReady();
2895 mService.mServices.systemServicesReady();
2896 }
2897 }
2898
2899 @Override
2900 public void onCleanupUser(int userId) {
2901 mService.mBatteryStatsService.onCleanupUser(userId);
2902 }
2903
2904 public ActivityManagerService getService() {
2905 return mService;
2906 }
2907 }
1.1.2.2 ActivityManagerService构造函数
3045 // Note: This method is invoked on the main thread but may need to attach various
3046 // handlers to other threads. So take care to be explicit about the looper.
3047 public ActivityManagerService(Context systemContext) {
3048 LockGuard.installLock(this, LockGuard.INDEX_ACTIVITY);
3049 mInjector = new Injector();
3050 mContext = systemContext;
3051
3052 mFactoryTest = FactoryTest.getMode();
3053 mSystemThread = ActivityThread.currentActivityThread();
3054 mUiContext = mSystemThread.getSystemUiContext();
3055
3056 Slog.i(TAG, "Memory class: " + ActivityManager.staticGetMemoryClass());
3057
3058 mPermissionReviewRequired = mContext.getResources().getBoolean(
3059 com.android.internal.R.bool.config_permissionReviewRequired);
3060
3061 mHandlerThread = new ServiceThread(TAG,
3062 THREAD_PRIORITY_FOREGROUND, false /*allowIo*/);
3063 mHandlerThread.start();
3064 mHandler = new MainHandler(mHandlerThread.getLooper());
3065 mUiHandler = mInjector.getUiHandler(this);
3066
3067 mProcStartHandlerThread = new ServiceThread(TAG + ":procStart",
3068 THREAD_PRIORITY_FOREGROUND, false /* allowIo */);
3069 mProcStartHandlerThread.start();
3070 mProcStartHandler = new Handler(mProcStartHandlerThread.getLooper());
3071
3072 mConstants = new ActivityManagerConstants(this, mHandler);
3073
3074 /* static; one-time init here */
3075 if (sKillHandler == null) {
3076 sKillThread = new ServiceThread(TAG + ":kill",
3077 THREAD_PRIORITY_BACKGROUND, true /* allowIo */);
3078 sKillThread.start();
3079 sKillHandler = new KillHandler(sKillThread.getLooper());
3080 }
3081
3082 mFgBroadcastQueue = new BroadcastQueue(this, mHandler,
3083 "foreground", BROADCAST_FG_TIMEOUT, false);
3084 mBgBroadcastQueue = new BroadcastQueue(this, mHandler,
3085 "background", BROADCAST_BG_TIMEOUT, true);
3086 mBroadcastQueues[0] = mFgBroadcastQueue;
3087 mBroadcastQueues[1] = mBgBroadcastQueue;
3088
3089 mServices = new ActiveServices(this);
3090 mProviderMap = new ProviderMap(this);
3091 mAppErrors = new AppErrors(mUiContext, this);
3092
3093 File dataDir = Environment.getDataDirectory();
3094 File systemDir = new File(dataDir, "system");
3095 systemDir.mkdirs();
3096
3097 mAppWarnings = new AppWarnings(this, mUiContext, mHandler, mUiHandler, systemDir);
3098
3099 // TODO: Move creation of battery stats service outside of activity manager service.
3100 mBatteryStatsService = new BatteryStatsService(systemContext, systemDir, mHandler);
3101 mBatteryStatsService.getActiveStatistics().readLocked();
3102 mBatteryStatsService.scheduleWriteToDisk();
3103 mOnBattery = DEBUG_POWER ? true
3104 : mBatteryStatsService.getActiveStatistics().getIsOnBattery();
3105 mBatteryStatsService.getActiveStatistics().setCallback(this);
3106
3107 mProcessStats = new ProcessStatsService(this, new File(systemDir, "procstats"));
3108
3109 mAppOpsService = mInjector.getAppOpsService(new File(systemDir, "appops.xml"), mHandler);
3110
3111 mGrantFile = new AtomicFile(new File(systemDir, "urigrants.xml"), "uri-grants");
3112
3113 mUserController = new UserController(this);
3114
3115 mVrController = new VrController(this);
3116
3117 GL_ES_VERSION = SystemProperties.getInt("ro.opengles.version",
3118 ConfigurationInfo.GL_ES_VERSION_UNDEFINED);
3119
3120 if (SystemProperties.getInt("sys.use_fifo_ui", 0) != 0) {
3121 mUseFifoUiScheduling = true;
3122 }
3123
3124 mTrackingAssociations = "1".equals(SystemProperties.get("debug.track-associations"));
3125 mTempConfig.setToDefaults();
3126 mTempConfig.setLocales(LocaleList.getDefault());
3127 mConfigurationSeq = mTempConfig.seq = 1;
3128 mStackSupervisor = createStackSupervisor();
3129 mStackSupervisor.onConfigurationChanged(mTempConfig);
3130 mKeyguardController = mStackSupervisor.getKeyguardController();
3131 mCompatModePackages = new CompatModePackages(this, systemDir, mHandler);
3132 mIntentFirewall = new IntentFirewall(new IntentFirewallInterface(), mHandler);
3133 mTaskChangeNotificationController =
3134 new TaskChangeNotificationController(this, mStackSupervisor, mHandler);
3135 mActivityStartController = new ActivityStartController(this);
3136 mRecentTasks = createRecentTasks();
3137 mStackSupervisor.setRecentTasks(mRecentTasks);
3138 mLockTaskController = new LockTaskController(mContext, mStackSupervisor, mHandler);
3139 mLifecycleManager = new ClientLifecycleManager();
3140
3141 mProcessCpuThread = new Thread("CpuTracker") {
3142 @Override
3143 public void run() {
3144 synchronized (mProcessCpuTracker) {
3145 mProcessCpuInitLatch.countDown();
3146 mProcessCpuTracker.init();
3147 }
3148 while (true) {
3149 try {
3150 try {
3151 synchronized(this) {
3152 final long now = SystemClock.uptimeMillis();
3153 long nextCpuDelay = (mLastCpuTime.get()+MONITOR_CPU_MAX_TIME)-now;
3154 long nextWriteDelay = (mLastWriteTime+BATTERY_STATS_TIME)-now;
3155 //Slog.i(TAG, "Cpu delay=" + nextCpuDelay
3156 // + ", write delay=" + nextWriteDelay);
3157 if (nextWriteDelay < nextCpuDelay) {
3158 nextCpuDelay = nextWriteDelay;
3159 }
3160 if (nextCpuDelay > 0) {
3161 mProcessCpuMutexFree.set(true);
3162 this.wait(nextCpuDelay);
3163 }
3164 }
3165 } catch (InterruptedException e) {
3166 }
3167 updateCpuStatsNow();
3168 } catch (Exception e) {
3169 Slog.e(TAG, "Unexpected exception collecting process stats", e);
3170 }
3171 }
3172 }
3173 };
3174
3175 mHiddenApiBlacklist = new HiddenApiSettings(mHandler, mContext);
3176
3177 Watchdog.getInstance().addMonitor(this);
3178 Watchdog.getInstance().addThread(mHandler);
3179
3180 // bind background thread to little cores
3181 // this is expected to fail inside of framework tests because apps can't touch cpusets directly
3182 // make sure we've already adjusted system_server's internal view of itself first
3183 updateOomAdjLocked();
3184 try {
3185 Process.setThreadGroupAndCpuset(BackgroundThread.get().getThreadId(),
3186 Process.THREAD_GROUP_BG_NONINTERACTIVE);
3187 } catch (Exception e) {
3188 Slog.w(TAG, "Setting background thread cpuset failed");
3189 }
3190
3191 }
ActivityManagerService构造函数主要做了以下逻辑：
3094行 创建系统相关目录
3100行 电量服务
3107行 统计应用进程的服务
3128行 activity任务栈
3141行 用于收集CPU信息
3183行 更新oomadj 用于处理系统如何杀死进程用的
1.1.3 设置系统相关的各种服务
我们看到666行通过mActivityManagerService.setSystemProcess()设置了一系列系统服务，下面我们来看看ActivityManagerService类的setSystemProcess()方法：
2720 public void setSystemProcess() {
2721 try {
2722 ServiceManager.addService(Context.ACTIVITY_SERVICE, this, /* allowIsolated= */ true,
2723 DUMP_FLAG_PRIORITY_CRITICAL | DUMP_FLAG_PRIORITY_NORMAL | DUMP_FLAG_PROTO);
2724 ServiceManager.addService(ProcessStats.SERVICE_NAME, mProcessStats);
2725 ServiceManager.addService("meminfo", new MemBinder(this), /* allowIsolated= */ false,
2726 DUMP_FLAG_PRIORITY_HIGH);
2727 ServiceManager.addService("gfxinfo", new GraphicsBinder(this));
2728 ServiceManager.addService("dbinfo", new DbBinder(this));
2729 if (MONITOR_CPU_USAGE) {
2730 ServiceManager.addService("cpuinfo", new CpuBinder(this),
2731 /* allowIsolated= */ false, DUMP_FLAG_PRIORITY_CRITICAL);
2732 }
2733 ServiceManager.addService("permission", new PermissionController(this));
2734 ServiceManager.addService("processinfo", new ProcessInfoService(this));
2735
2736 ApplicationInfo info = mContext.getPackageManager().getApplicationInfo(
2737 "android", STOCK_PM_FLAGS | MATCH_SYSTEM_ONLY);
2738 mSystemThread.installSystemApplicationInfo(info, getClass().getClassLoader());
2739
2740 synchronized (this) {
2741 ProcessRecord app = newProcessRecordLocked(info, info.processName, false, 0);
2742 app.persistent = true;
2743 app.pid = MY_PID;
2744 app.maxAdj = ProcessList.SYSTEM_ADJ;
2745 app.makeActive(mSystemThread.getApplicationThread(), mProcessStats);
2746 synchronized (mPidsSelfLocked) {
2747 mPidsSelfLocked.put(app.pid, app);
2748 }
2749 updateLruProcessLocked(app, false, null);
2750 updateOomAdjLocked();
2751 }
2752 } catch (PackageManager.NameNotFoundException e) {
2753 throw new RuntimeException(
2754 "Unable to find android system package", e);
2755 }
2756
2757 // Start watching app ops after we and the package manager are up and running.
2758 mAppOpsService.startWatchingMode(AppOpsManager.OP_RUN_IN_BACKGROUND, null,
2759 new IAppOpsCallback.Stub() {
2760 @Override public void opChanged(int op, int uid, String packageName) {
2761 if (op == AppOpsManager.OP_RUN_IN_BACKGROUND && packageName != null) {
2762 if (mAppOpsService.checkOperation(op, uid, packageName)
2763 != AppOpsManager.MODE_ALLOWED) {
2764 runInBackgroundDisabled(uid);
2765 }
2766 }
2767 }
2768 });
2769 }
1.ServiceManager是一个java层对c/c++层service_manager的封装，用来管理binder服务的
2.这里都是binder通信服务，不只是系统用的，还用于暴路接口给其它进程使用，比如： adb shell dumpsys meminfo
3.添加ApplicationInfo 在其它应用进程需要AMS服务时，就是通过他获取的
1.2 startCoreServices()启动核心服务
691 /**
692 * Starts some essential services that are not tangled up in the bootstrap process.
693 */
694 private void startCoreServices() {
695 traceBeginAndSlog("StartBatteryService");
696 // Tracks the battery level. Requires LightService.
697 mSystemServiceManager.startService(BatteryService.class);
698 traceEnd();
699
700 // Tracks application usage stats.
701 traceBeginAndSlog("StartUsageService");
702 mSystemServiceManager.startService(UsageStatsService.class);
703 mActivityManagerService.setUsageStatsManager(
704 LocalServices.getService(UsageStatsManagerInternal.class));
705 traceEnd();
706
707 // Tracks whether the updatable WebView is in a ready state and watches for update installs.
708 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_WEBVIEW)) {
709 traceBeginAndSlog("StartWebViewUpdateService");
710 mWebViewUpdateService = mSystemServiceManager.startService(WebViewUpdateService.class);
711 traceEnd();
712 }
713
714 // Tracks cpu time spent in binder calls
715 traceBeginAndSlog("StartBinderCallsStatsService");
716 BinderCallsStatsService.start();
717 traceEnd();
718 }
核心服务就几个，分别为：BatteryService电量服务、UsageStatsService用户状态管理服务、WebViewUpdateService更新服务、BinderCallsStatsService绑定调用状态服务
1.3 startOtherServices()启动其他服务
720 /**
721 * Starts a miscellaneous grab bag of stuff that has yet to be refactored
722 * and organized.
723 */
724 private void startOtherServices() {
725 final Context context = mSystemContext;
726 VibratorService vibrator = null;
727 IStorageManager storageManager = null;
728 NetworkManagementService networkManagement = null;
729 IpSecService ipSecService = null;
730 NetworkStatsService networkStats = null;
731 NetworkPolicyManagerService networkPolicy = null;
732 ConnectivityService connectivity = null;
733 NsdService serviceDiscovery= null;
734 WindowManagerService wm = null;
735 SerialService serial = null;
736 NetworkTimeUpdateService networkTimeUpdater = null;
737 CommonTimeManagementService commonTimeMgmtService = null;
738 InputManagerService inputManager = null;
739 TelephonyRegistry telephonyRegistry = null;
740 ConsumerIrService consumerIr = null;
741 MmsServiceBroker mmsService = null;
742 HardwarePropertiesManagerService hardwarePropertiesService = null;
743
744 boolean disableSystemTextClassifier = SystemProperties.getBoolean(
745 "config.disable_systemtextclassifier", false);
746 boolean disableCameraService = SystemProperties.getBoolean("config.disable_cameraservice",
747 false);
748 boolean disableSlices = SystemProperties.getBoolean("config.disable_slices", false);
749 boolean enableLeftyService = SystemProperties.getBoolean("config.enable_lefty", false);
750
751 boolean isEmulator = SystemProperties.get("ro.kernel.qemu").equals("1");
752
753 boolean isWatch = context.getPackageManager().hasSystemFeature(
754 PackageManager.FEATURE_WATCH);
755
756 // For debugging RescueParty
757 if (Build.IS_DEBUGGABLE && SystemProperties.getBoolean("debug.crash_system", false)) {
758 throw new RuntimeException();
759 }
760
761 try {
762 final String SECONDARY_ZYGOTE_PRELOAD = "SecondaryZygotePreload";
763 // We start the preload ~1s before the webview factory preparation, to
764 // ensure that it completes before the 32 bit relro process is forked
765 // from the zygote. In the event that it takes too long, the webview
766 // RELRO process will block, but it will do so without holding any locks.
767 mZygotePreload = SystemServerInitThreadPool.get().submit(() -> {
768 try {
769 Slog.i(TAG, SECONDARY_ZYGOTE_PRELOAD);
770 TimingsTraceLog traceLog = new TimingsTraceLog(
771 SYSTEM_SERVER_TIMING_ASYNC_TAG, Trace.TRACE_TAG_SYSTEM_SERVER);
772 traceLog.traceBegin(SECONDARY_ZYGOTE_PRELOAD);
773 if (!Process.zygoteProcess.preloadDefault(Build.SUPPORTED_32_BIT_ABIS[0])) {
774 Slog.e(TAG, "Unable to preload default resources");
775 }
776 traceLog.traceEnd();
777 } catch (Exception ex) {
778 Slog.e(TAG, "Exception preloading default resources", ex);
779 }
780 }, SECONDARY_ZYGOTE_PRELOAD);
781
782 traceBeginAndSlog("StartKeyAttestationApplicationIdProviderService");
783 ServiceManager.addService("sec_key_att_app_id_provider",
784 new KeyAttestationApplicationIdProviderService(context));
785 traceEnd();
786
787 traceBeginAndSlog("StartKeyChainSystemService");
788 mSystemServiceManager.startService(KeyChainSystemService.class);
789 traceEnd();
790
791 traceBeginAndSlog("StartSchedulingPolicyService");
792 ServiceManager.addService("scheduling_policy", new SchedulingPolicyService());
793 traceEnd();
794
795 traceBeginAndSlog("StartTelecomLoaderService");
796 mSystemServiceManager.startService(TelecomLoaderService.class);
797 traceEnd();
798
799 traceBeginAndSlog("StartTelephonyRegistry");
800 telephonyRegistry = new TelephonyRegistry(context);
801 ServiceManager.addService("telephony.registry", telephonyRegistry);
802 traceEnd();
803
804 traceBeginAndSlog("StartEntropyMixer");
805 mEntropyMixer = new EntropyMixer(context);
806 traceEnd();
807
808 mContentResolver = context.getContentResolver();
809
810 // The AccountManager must come before the ContentService
811 traceBeginAndSlog("StartAccountManagerService");
812 mSystemServiceManager.startService(ACCOUNT_SERVICE_CLASS);
813 traceEnd();
814
815 traceBeginAndSlog("StartContentService");
816 mSystemServiceManager.startService(CONTENT_SERVICE_CLASS);
817 traceEnd();
818
819 traceBeginAndSlog("InstallSystemProviders");
820 mActivityManagerService.installSystemProviders();
821 // Now that SettingsProvider is ready, reactivate SQLiteCompatibilityWalFlags
822 SQLiteCompatibilityWalFlags.reset();
823 traceEnd();
824
825 // Records errors and logs, for example wtf()
826 // Currently this service indirectly depends on SettingsProvider so do this after
827 // InstallSystemProviders.
828 traceBeginAndSlog("StartDropBoxManager");
829 mSystemServiceManager.startService(DropBoxManagerService.class);
830 traceEnd();
831
832 traceBeginAndSlog("StartVibratorService");
833 vibrator = new VibratorService(context);
834 ServiceManager.addService("vibrator", vibrator);
835 traceEnd();
836
837 if (!isWatch) {
838 traceBeginAndSlog("StartConsumerIrService");
839 consumerIr = new ConsumerIrService(context);
840 ServiceManager.addService(Context.CONSUMER_IR_SERVICE, consumerIr);
841 traceEnd();
842 }
843
844 traceBeginAndSlog("StartAlarmManagerService");
845 mSystemServiceManager.startService(AlarmManagerService.class);
846 traceEnd();
847
848 traceBeginAndSlog("InitWatchdog");
849 final Watchdog watchdog = Watchdog.getInstance();
850 watchdog.init(context, mActivityManagerService);
851 traceEnd();
852
853 traceBeginAndSlog("StartInputManagerService");
854 inputManager = new InputManagerService(context);
855 traceEnd();
856
857 traceBeginAndSlog("StartWindowManagerService");
858 // WMS needs sensor service ready
859 ConcurrentUtils.waitForFutureNoInterrupt(mSensorServiceStart, START_SENSOR_SERVICE);
860 mSensorServiceStart = null;
861 wm = WindowManagerService.main(context, inputManager,
862 mFactoryTestMode != FactoryTest.FACTORY_TEST_LOW_LEVEL,
863 !mFirstBoot, mOnlyCore, new PhoneWindowManager());
864 ServiceManager.addService(Context.WINDOW_SERVICE, wm, /* allowIsolated= */ false,
865 DUMP_FLAG_PRIORITY_CRITICAL | DUMP_FLAG_PROTO);
866 ServiceManager.addService(Context.INPUT_SERVICE, inputManager,
867 /* allowIsolated= */ false, DUMP_FLAG_PRIORITY_CRITICAL);
868 traceEnd();
869
870 traceBeginAndSlog("SetWindowManagerService");
871 mActivityManagerService.setWindowManager(wm);
872 traceEnd();
873
874 traceBeginAndSlog("WindowManagerServiceOnInitReady");
875 wm.onInitReady();
876 traceEnd();
877
878 // Start receiving calls from HIDL services. Start in in a separate thread
879 // because it need to connect to SensorManager. This have to start
880 // after START_SENSOR_SERVICE is done.
881 SystemServerInitThreadPool.get().submit(() -> {
882 TimingsTraceLog traceLog = new TimingsTraceLog(
883 SYSTEM_SERVER_TIMING_ASYNC_TAG, Trace.TRACE_TAG_SYSTEM_SERVER);
884 traceLog.traceBegin(START_HIDL_SERVICES);
885 startHidlServices();
886 traceLog.traceEnd();
887 }, START_HIDL_SERVICES);
888
889 if (!isWatch) {
890 traceBeginAndSlog("StartVrManagerService");
891 mSystemServiceManager.startService(VrManagerService.class);
892 traceEnd();
893 }
894
895 traceBeginAndSlog("StartInputManager");
896 inputManager.setWindowManagerCallbacks(wm.getInputMonitor());
897 inputManager.start();
898 traceEnd();
899
900 // TODO: Use service dependencies instead.
901 traceBeginAndSlog("DisplayManagerWindowManagerAndInputReady");
902 mDisplayManagerService.windowManagerAndInputReady();
903 traceEnd();
904
905 // Skip Bluetooth if we have an emulator kernel
906 // TODO: Use a more reliable check to see if this product should
907 // support Bluetooth - see bug 988521
908 if (isEmulator) {
909 Slog.i(TAG, "No Bluetooth Service (emulator)");
910 } else if (mFactoryTestMode == FactoryTest.FACTORY_TEST_LOW_LEVEL) {
911 Slog.i(TAG, "No Bluetooth Service (factory test)");
912 } else if (!context.getPackageManager().hasSystemFeature
913 (PackageManager.FEATURE_BLUETOOTH)) {
914 Slog.i(TAG, "No Bluetooth Service (Bluetooth Hardware Not Present)");
915 } else {
916 traceBeginAndSlog("StartBluetoothService");
917 mSystemServiceManager.startService(BluetoothService.class);
918 traceEnd();
919 }
920
921 traceBeginAndSlog("IpConnectivityMetrics");
922 mSystemServiceManager.startService(IpConnectivityMetrics.class);
923 traceEnd();
924
925 traceBeginAndSlog("NetworkWatchlistService");
926 mSystemServiceManager.startService(NetworkWatchlistService.Lifecycle.class);
927 traceEnd();
928
929 traceBeginAndSlog("PinnerService");
930 mSystemServiceManager.startService(PinnerService.class);
931 traceEnd();
932 } catch (RuntimeException e) {
933 Slog.e("System", "******************************************");
934 Slog.e("System", "************ Failure starting core service", e);
935 }
936
937 StatusBarManagerService statusBar = null;
938 INotificationManager notification = null;
939 LocationManagerService location = null;
940 CountryDetectorService countryDetector = null;
941 ILockSettings lockSettings = null;
942 MediaRouterService mediaRouter = null;
943
944 // Bring up services needed for UI.
945 if (mFactoryTestMode != FactoryTest.FACTORY_TEST_LOW_LEVEL) {
946 traceBeginAndSlog("StartInputMethodManagerLifecycle");
947 mSystemServiceManager.startService(InputMethodManagerService.Lifecycle.class);
948 traceEnd();
949
950 traceBeginAndSlog("StartAccessibilityManagerService");
951 try {
952 ServiceManager.addService(Context.ACCESSIBILITY_SERVICE,
953 new AccessibilityManagerService(context));
954 } catch (Throwable e) {
955 reportWtf("starting Accessibility Manager", e);
956 }
957 traceEnd();
958 }
959
960 traceBeginAndSlog("MakeDisplayReady");
961 try {
962 wm.displayReady();
963 } catch (Throwable e) {
964 reportWtf("making display ready", e);
965 }
966 traceEnd();
967
968 if (mFactoryTestMode != FactoryTest.FACTORY_TEST_LOW_LEVEL) {
969 if (!"0".equals(SystemProperties.get("system_init.startmountservice"))) {
970 traceBeginAndSlog("StartStorageManagerService");
971 try {
972 /*
973 * NotificationManagerService is dependant on StorageManagerService,
974 * (for media / usb notifications) so we must start StorageManagerService first.
975 */
976 mSystemServiceManager.startService(STORAGE_MANAGER_SERVICE_CLASS);
977 storageManager = IStorageManager.Stub.asInterface(
978 ServiceManager.getService("mount"));
979 } catch (Throwable e) {
980 reportWtf("starting StorageManagerService", e);
981 }
982 traceEnd();
983
984 traceBeginAndSlog("StartStorageStatsService");
985 try {
986 mSystemServiceManager.startService(STORAGE_STATS_SERVICE_CLASS);
987 } catch (Throwable e) {
988 reportWtf("starting StorageStatsService", e);
989 }
990 traceEnd();
991 }
992 }
993
994 // We start this here so that we update our configuration to set watch or television
995 // as appropriate.
996 traceBeginAndSlog("StartUiModeManager");
997 mSystemServiceManager.startService(UiModeManagerService.class);
998 traceEnd();
999
1000 if (!mOnlyCore) {
1001 traceBeginAndSlog("UpdatePackagesIfNeeded");
1002 try {
1003 mPackageManagerService.updatePackagesIfNeeded();
1004 } catch (Throwable e) {
1005 reportWtf("update packages", e);
1006 }
1007 traceEnd();
1008 }
1009
1010 traceBeginAndSlog("PerformFstrimIfNeeded");
1011 try {
1012 mPackageManagerService.performFstrimIfNeeded();
1013 } catch (Throwable e) {
1014 reportWtf("performing fstrim", e);
1015 }
1016 traceEnd();
1017
1018 if (mFactoryTestMode != FactoryTest.FACTORY_TEST_LOW_LEVEL) {
1019 traceBeginAndSlog("StartLockSettingsService");
1020 try {
1021 mSystemServiceManager.startService(LOCK_SETTINGS_SERVICE_CLASS);
1022 lockSettings = ILockSettings.Stub.asInterface(
1023 ServiceManager.getService("lock_settings"));
1024 } catch (Throwable e) {
1025 reportWtf("starting LockSettingsService service", e);
1026 }
1027 traceEnd();
1028
1029 final boolean hasPdb = !SystemProperties.get(PERSISTENT_DATA_BLOCK_PROP).equals("");
1030 if (hasPdb) {
1031 traceBeginAndSlog("StartPersistentDataBlock");
1032 mSystemServiceManager.startService(PersistentDataBlockService.class);
1033 traceEnd();
1034 }
1035
1036 if (hasPdb || OemLockService.isHalPresent()) {
1037 // Implementation depends on pdb or the OemLock HAL
1038 traceBeginAndSlog("StartOemLockService");
1039 mSystemServiceManager.startService(OemLockService.class);
1040 traceEnd();
1041 }
1042
1043 traceBeginAndSlog("StartDeviceIdleController");
1044 mSystemServiceManager.startService(DeviceIdleController.class);
1045 traceEnd();
1046
1047 // Always start the Device Policy Manager, so that the API is compatible with
1048 // API8.
1049 traceBeginAndSlog("StartDevicePolicyManager");
1050 mSystemServiceManager.startService(DevicePolicyManagerService.Lifecycle.class);
1051 traceEnd();
1052
1053 if (!isWatch) {
1054 traceBeginAndSlog("StartStatusBarManagerService");
1055 try {
1056 statusBar = new StatusBarManagerService(context, wm);
1057 ServiceManager.addService(Context.STATUS_BAR_SERVICE, statusBar);
1058 } catch (Throwable e) {
1059 reportWtf("starting StatusBarManagerService", e);
1060 }
1061 traceEnd();
1062 }
1063
1064 traceBeginAndSlog("StartClipboardService");
1065 mSystemServiceManager.startService(ClipboardService.class);
1066 traceEnd();
1067
1068 traceBeginAndSlog("StartNetworkManagementService");
1069 try {
1070 networkManagement = NetworkManagementService.create(context);
1071 ServiceManager.addService(Context.NETWORKMANAGEMENT_SERVICE, networkManagement);
1072 } catch (Throwable e) {
1073 reportWtf("starting NetworkManagement Service", e);
1074 }
1075 traceEnd();
1076
1077 traceBeginAndSlog("StartIpSecService");
1078 try {
1079 ipSecService = IpSecService.create(context);
1080 ServiceManager.addService(Context.IPSEC_SERVICE, ipSecService);
1081 } catch (Throwable e) {
1082 reportWtf("starting IpSec Service", e);
1083 }
1084 traceEnd();
1085
1086 traceBeginAndSlog("StartTextServicesManager");
1087 mSystemServiceManager.startService(TextServicesManagerService.Lifecycle.class);
1088 traceEnd();
1089
1090 if (!disableSystemTextClassifier) {
1091 traceBeginAndSlog("StartTextClassificationManagerService");
1092 mSystemServiceManager.startService(TextClassificationManagerService.Lifecycle.class);
1093 traceEnd();
1094 }
1095
1096 traceBeginAndSlog("StartNetworkScoreService");
1097 mSystemServiceManager.startService(NetworkScoreService.Lifecycle.class);
1098 traceEnd();
1099
1100 traceBeginAndSlog("StartNetworkStatsService");
1101 try {
1102 networkStats = NetworkStatsService.create(context, networkManagement);
1103 ServiceManager.addService(Context.NETWORK_STATS_SERVICE, networkStats);
1104 } catch (Throwable e) {
1105 reportWtf("starting NetworkStats Service", e);
1106 }
1107 traceEnd();
1108
1109 traceBeginAndSlog("StartNetworkPolicyManagerService");
1110 try {
1111 networkPolicy = new NetworkPolicyManagerService(context, mActivityManagerService,
1112 networkManagement);
1113 ServiceManager.addService(Context.NETWORK_POLICY_SERVICE, networkPolicy);
1114 } catch (Throwable e) {
1115 reportWtf("starting NetworkPolicy Service", e);
1116 }
1117 traceEnd();
1118
1119 if (!mOnlyCore) {
1120 if (context.getPackageManager().hasSystemFeature(
1121 PackageManager.FEATURE_WIFI)) {
1122 // Wifi Service must be started first for wifi-related services.
1123 traceBeginAndSlog("StartWifi");
1124 mSystemServiceManager.startService(WIFI_SERVICE_CLASS);
1125 traceEnd();
1126 traceBeginAndSlog("StartWifiScanning");
1127 mSystemServiceManager.startService(
1128 "com.android.server.wifi.scanner.WifiScanningService");
1129 traceEnd();
1130 }
1131
1132 if (context.getPackageManager().hasSystemFeature(
1133 PackageManager.FEATURE_WIFI_RTT)) {
1134 traceBeginAndSlog("StartRttService");
1135 mSystemServiceManager.startService(
1136 "com.android.server.wifi.rtt.RttService");
1137 traceEnd();
1138 }
1139
1140 if (context.getPackageManager().hasSystemFeature(
1141 PackageManager.FEATURE_WIFI_AWARE)) {
1142 traceBeginAndSlog("StartWifiAware");
1143 mSystemServiceManager.startService(WIFI_AWARE_SERVICE_CLASS);
1144 traceEnd();
1145 }
1146
1147 if (context.getPackageManager().hasSystemFeature(
1148 PackageManager.FEATURE_WIFI_DIRECT)) {
1149 traceBeginAndSlog("StartWifiP2P");
1150 mSystemServiceManager.startService(WIFI_P2P_SERVICE_CLASS);
1151 traceEnd();
1152 }
1153
1154 if (context.getPackageManager().hasSystemFeature(
1155 PackageManager.FEATURE_LOWPAN)) {
1156 traceBeginAndSlog("StartLowpan");
1157 mSystemServiceManager.startService(LOWPAN_SERVICE_CLASS);
1158 traceEnd();
1159 }
1160 }
1161
1162 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_ETHERNET) ||
1163 mPackageManager.hasSystemFeature(PackageManager.FEATURE_USB_HOST)) {
1164 traceBeginAndSlog("StartEthernet");
1165 mSystemServiceManager.startService(ETHERNET_SERVICE_CLASS);
1166 traceEnd();
1167 }
1168
1169 traceBeginAndSlog("StartConnectivityService");
1170 try {
1171 connectivity = new ConnectivityService(
1172 context, networkManagement, networkStats, networkPolicy);
1173 ServiceManager.addService(Context.CONNECTIVITY_SERVICE, connectivity,
1174 /* allowIsolated= */ false,
1175 DUMP_FLAG_PRIORITY_HIGH | DUMP_FLAG_PRIORITY_NORMAL);
1176 networkStats.bindConnectivityManager(connectivity);
1177 networkPolicy.bindConnectivityManager(connectivity);
1178 } catch (Throwable e) {
1179 reportWtf("starting Connectivity Service", e);
1180 }
1181 traceEnd();
1182
1183 traceBeginAndSlog("StartNsdService");
1184 try {
1185 serviceDiscovery = NsdService.create(context);
1186 ServiceManager.addService(
1187 Context.NSD_SERVICE, serviceDiscovery);
1188 } catch (Throwable e) {
1189 reportWtf("starting Service Discovery Service", e);
1190 }
1191 traceEnd();
1192
1193 traceBeginAndSlog("StartSystemUpdateManagerService");
1194 try {
1195 ServiceManager.addService(Context.SYSTEM_UPDATE_SERVICE,
1196 new SystemUpdateManagerService(context));
1197 } catch (Throwable e) {
1198 reportWtf("starting SystemUpdateManagerService", e);
1199 }
1200 traceEnd();
1201
1202 traceBeginAndSlog("StartUpdateLockService");
1203 try {
1204 ServiceManager.addService(Context.UPDATE_LOCK_SERVICE,
1205 new UpdateLockService(context));
1206 } catch (Throwable e) {
1207 reportWtf("starting UpdateLockService", e);
1208 }
1209 traceEnd();
1210
1211 traceBeginAndSlog("StartNotificationManager");
1212 mSystemServiceManager.startService(NotificationManagerService.class);
1213 SystemNotificationChannels.createAll(context);
1214 notification = INotificationManager.Stub.asInterface(
1215 ServiceManager.getService(Context.NOTIFICATION_SERVICE));
1216 traceEnd();
1217
1218 traceBeginAndSlog("StartDeviceMonitor");
1219 mSystemServiceManager.startService(DeviceStorageMonitorService.class);
1220 traceEnd();
1221
1222 traceBeginAndSlog("StartLocationManagerService");
1223 try {
1224 location = new LocationManagerService(context);
1225 ServiceManager.addService(Context.LOCATION_SERVICE, location);
1226 } catch (Throwable e) {
1227 reportWtf("starting Location Manager", e);
1228 }
1229 traceEnd();
1230
1231 traceBeginAndSlog("StartCountryDetectorService");
1232 try {
1233 countryDetector = new CountryDetectorService(context);
1234 ServiceManager.addService(Context.COUNTRY_DETECTOR, countryDetector);
1235 } catch (Throwable e) {
1236 reportWtf("starting Country Detector", e);
1237 }
1238 traceEnd();
1239
1240 if (!isWatch) {
1241 traceBeginAndSlog("StartSearchManagerService");
1242 try {
1243 mSystemServiceManager.startService(SEARCH_MANAGER_SERVICE_CLASS);
1244 } catch (Throwable e) {
1245 reportWtf("starting Search Service", e);
1246 }
1247 traceEnd();
1248 }
1249
1250 if (context.getResources().getBoolean(R.bool.config_enableWallpaperService)) {
1251 traceBeginAndSlog("StartWallpaperManagerService");
1252 mSystemServiceManager.startService(WALLPAPER_SERVICE_CLASS);
1253 traceEnd();
1254 }
1255
1256 traceBeginAndSlog("StartAudioService");
1257 mSystemServiceManager.startService(AudioService.Lifecycle.class);
1258 traceEnd();
1259
1260 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_BROADCAST_RADIO)) {
1261 traceBeginAndSlog("StartBroadcastRadioService");
1262 mSystemServiceManager.startService(BroadcastRadioService.class);
1263 traceEnd();
1264 }
1265
1266 traceBeginAndSlog("StartDockObserver");
1267 mSystemServiceManager.startService(DockObserver.class);
1268 traceEnd();
1269
1270 if (isWatch) {
1271 traceBeginAndSlog("StartThermalObserver");
1272 mSystemServiceManager.startService(THERMAL_OBSERVER_CLASS);
1273 traceEnd();
1274 }
1275
1276 traceBeginAndSlog("StartWiredAccessoryManager");
1277 try {
1278 // Listen for wired headset changes
1279 inputManager.setWiredAccessoryCallbacks(
1280 new WiredAccessoryManager(context, inputManager));
1281 } catch (Throwable e) {
1282 reportWtf("starting WiredAccessoryManager", e);
1283 }
1284 traceEnd();
1285
1286 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_MIDI)) {
1287 // Start MIDI Manager service
1288 traceBeginAndSlog("StartMidiManager");
1289 mSystemServiceManager.startService(MIDI_SERVICE_CLASS);
1290 traceEnd();
1291 }
1292
1293 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_USB_HOST)
1294 || mPackageManager.hasSystemFeature(
1295 PackageManager.FEATURE_USB_ACCESSORY)
1296 || isEmulator) {
1297 // Manage USB host and device support
1298 traceBeginAndSlog("StartUsbService");
1299 mSystemServiceManager.startService(USB_SERVICE_CLASS);
1300 traceEnd();
1301 }
1302
1303 if (!isWatch) {
1304 traceBeginAndSlog("StartSerialService");
1305 try {
1306 // Serial port support
1307 serial = new SerialService(context);
1308 ServiceManager.addService(Context.SERIAL_SERVICE, serial);
1309 } catch (Throwable e) {
1310 Slog.e(TAG, "Failure starting SerialService", e);
1311 }
1312 traceEnd();
1313 }
1314
1315 traceBeginAndSlog("StartHardwarePropertiesManagerService");
1316 try {
1317 hardwarePropertiesService = new HardwarePropertiesManagerService(context);
1318 ServiceManager.addService(Context.HARDWARE_PROPERTIES_SERVICE,
1319 hardwarePropertiesService);
1320 } catch (Throwable e) {
1321 Slog.e(TAG, "Failure starting HardwarePropertiesManagerService", e);
1322 }
1323 traceEnd();
1324
1325 traceBeginAndSlog("StartTwilightService");
1326 mSystemServiceManager.startService(TwilightService.class);
1327 traceEnd();
1328
1329 if (ColorDisplayController.isAvailable(context)) {
1330 traceBeginAndSlog("StartNightDisplay");
1331 mSystemServiceManager.startService(ColorDisplayService.class);
1332 traceEnd();
1333 }
1334
1335 traceBeginAndSlog("StartJobScheduler");
1336 mSystemServiceManager.startService(JobSchedulerService.class);
1337 traceEnd();
1338
1339 traceBeginAndSlog("StartSoundTrigger");
1340 mSystemServiceManager.startService(SoundTriggerService.class);
1341 traceEnd();
1342
1343 traceBeginAndSlog("StartTrustManager");
1344 mSystemServiceManager.startService(TrustManagerService.class);
1345 traceEnd();
1346
1347 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_BACKUP)) {
1348 traceBeginAndSlog("StartBackupManager");
1349 mSystemServiceManager.startService(BACKUP_MANAGER_SERVICE_CLASS);
1350 traceEnd();
1351 }
1352
1353 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_APP_WIDGETS)
1354 || context.getResources().getBoolean(R.bool.config_enableAppWidgetService)) {
1355 traceBeginAndSlog("StartAppWidgerService");
1356 mSystemServiceManager.startService(APPWIDGET_SERVICE_CLASS);
1357 traceEnd();
1358 }
1359
1360 // We need to always start this service, regardless of whether the
1361 // FEATURE_VOICE_RECOGNIZERS feature is set, because it needs to take care
1362 // of initializing various settings. It will internally modify its behavior
1363 // based on that feature.
1364 traceBeginAndSlog("StartVoiceRecognitionManager");
1365 mSystemServiceManager.startService(VOICE_RECOGNITION_MANAGER_SERVICE_CLASS);
1366 traceEnd();
1367
1368 if (GestureLauncherService.isGestureLauncherEnabled(context.getResources())) {
1369 traceBeginAndSlog("StartGestureLauncher");
1370 mSystemServiceManager.startService(GestureLauncherService.class);
1371 traceEnd();
1372 }
1373 traceBeginAndSlog("StartSensorNotification");
1374 mSystemServiceManager.startService(SensorNotificationService.class);
1375 traceEnd();
1376
1377 traceBeginAndSlog("StartContextHubSystemService");
1378 mSystemServiceManager.startService(ContextHubSystemService.class);
1379 traceEnd();
1380
1381 traceBeginAndSlog("StartDiskStatsService");
1382 try {
1383 ServiceManager.addService("diskstats", new DiskStatsService(context));
1384 } catch (Throwable e) {
1385 reportWtf("starting DiskStats Service", e);
1386 }
1387 traceEnd();
1388
1389 // timezone.RulesManagerService will prevent a device starting up if the chain of trust
1390 // required for safe time zone updates might be broken. RuleManagerService cannot do
1391 // this check when mOnlyCore == true, so we don't enable the service in this case.
1392 // This service requires that JobSchedulerService is already started when it starts.
1393 final boolean startRulesManagerService =
1394 !mOnlyCore && context.getResources().getBoolean(
1395 R.bool.config_enableUpdateableTimeZoneRules);
1396 if (startRulesManagerService) {
1397 traceBeginAndSlog("StartTimeZoneRulesManagerService");
1398 mSystemServiceManager.startService(TIME_ZONE_RULES_MANAGER_SERVICE_CLASS);
1399 traceEnd();
1400 }
1401
1402 if (!isWatch) {
1403 traceBeginAndSlog("StartNetworkTimeUpdateService");
1404 try {
1405 networkTimeUpdater = new NetworkTimeUpdateService(context);
1406 ServiceManager.addService("network_time_update_service", networkTimeUpdater);
1407 } catch (Throwable e) {
1408 reportWtf("starting NetworkTimeUpdate service", e);
1409 }
1410 traceEnd();
1411 }
1412
1413 traceBeginAndSlog("StartCommonTimeManagementService");
1414 try {
1415 commonTimeMgmtService = new CommonTimeManagementService(context);
1416 ServiceManager.addService("commontime_management", commonTimeMgmtService);
1417 } catch (Throwable e) {
1418 reportWtf("starting CommonTimeManagementService service", e);
1419 }
1420 traceEnd();
1421
1422 traceBeginAndSlog("CertBlacklister");
1423 try {
1424 CertBlacklister blacklister = new CertBlacklister(context);
1425 } catch (Throwable e) {
1426 reportWtf("starting CertBlacklister", e);
1427 }
1428 traceEnd();
1429
1430 if (EmergencyAffordanceManager.ENABLED) {
1431 // EmergencyMode service
1432 traceBeginAndSlog("StartEmergencyAffordanceService");
1433 mSystemServiceManager.startService(EmergencyAffordanceService.class);
1434 traceEnd();
1435 }
1436
1437 // Dreams (interactive idle-time views, a/k/a screen savers, and doze mode)
1438 traceBeginAndSlog("StartDreamManager");
1439 mSystemServiceManager.startService(DreamManagerService.class);
1440 traceEnd();
1441
1442 traceBeginAndSlog("AddGraphicsStatsService");
1443 ServiceManager.addService(GraphicsStatsService.GRAPHICS_STATS_SERVICE,
1444 new GraphicsStatsService(context));
1445 traceEnd();
1446
1447 if (CoverageService.ENABLED) {
1448 traceBeginAndSlog("AddCoverageService");
1449 ServiceManager.addService(CoverageService.COVERAGE_SERVICE, new CoverageService());
1450 traceEnd();
1451 }
1452
1453 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_PRINTING)) {
1454 traceBeginAndSlog("StartPrintManager");
1455 mSystemServiceManager.startService(PRINT_MANAGER_SERVICE_CLASS);
1456 traceEnd();
1457 }
1458
1459 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_COMPANION_DEVICE_SETUP)) {
1460 traceBeginAndSlog("StartCompanionDeviceManager");
1461 mSystemServiceManager.startService(COMPANION_DEVICE_MANAGER_SERVICE_CLASS);
1462 traceEnd();
1463 }
1464
1465 traceBeginAndSlog("StartRestrictionManager");
1466 mSystemServiceManager.startService(RestrictionsManagerService.class);
1467 traceEnd();
1468
1469 traceBeginAndSlog("StartMediaSessionService");
1470 mSystemServiceManager.startService(MediaSessionService.class);
1471 traceEnd();
1472
1473 traceBeginAndSlog("StartMediaUpdateService");
1474 mSystemServiceManager.startService(MediaUpdateService.class);
1475 traceEnd();
1476
1477 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_HDMI_CEC)) {
1478 traceBeginAndSlog("StartHdmiControlService");
1479 mSystemServiceManager.startService(HdmiControlService.class);
1480 traceEnd();
1481 }
1482
1483 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_LIVE_TV)
1484 || mPackageManager.hasSystemFeature(PackageManager.FEATURE_LEANBACK)) {
1485 traceBeginAndSlog("StartTvInputManager");
1486 mSystemServiceManager.startService(TvInputManagerService.class);
1487 traceEnd();
1488 }
1489
1490 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_PICTURE_IN_PICTURE)) {
1491 traceBeginAndSlog("StartMediaResourceMonitor");
1492 mSystemServiceManager.startService(MediaResourceMonitorService.class);
1493 traceEnd();
1494 }
1495
1496 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_LEANBACK)) {
1497 traceBeginAndSlog("StartTvRemoteService");
1498 mSystemServiceManager.startService(TvRemoteService.class);
1499 traceEnd();
1500 }
1501
1502 traceBeginAndSlog("StartMediaRouterService");
1503 try {
1504 mediaRouter = new MediaRouterService(context);
1505 ServiceManager.addService(Context.MEDIA_ROUTER_SERVICE, mediaRouter);
1506 } catch (Throwable e) {
1507 reportWtf("starting MediaRouterService", e);
1508 }
1509 traceEnd();
1510
1511 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_FINGERPRINT)) {
1512 traceBeginAndSlog("StartFingerprintSensor");
1513 mSystemServiceManager.startService(FingerprintService.class);
1514 traceEnd();
1515 }
1516
1517 traceBeginAndSlog("StartBackgroundDexOptService");
1518 try {
1519 BackgroundDexOptService.schedule(context);
1520 } catch (Throwable e) {
1521 reportWtf("starting StartBackgroundDexOptService", e);
1522 }
1523 traceEnd();
1524
1525 traceBeginAndSlog("StartPruneInstantAppsJobService");
1526 try {
1527 PruneInstantAppsJobService.schedule(context);
1528 } catch (Throwable e) {
1529 reportWtf("StartPruneInstantAppsJobService", e);
1530 }
1531 traceEnd();
1532
1533 // LauncherAppsService uses ShortcutService.
1534 traceBeginAndSlog("StartShortcutServiceLifecycle");
1535 mSystemServiceManager.startService(ShortcutService.Lifecycle.class);
1536 traceEnd();
1537
1538 traceBeginAndSlog("StartLauncherAppsService");
1539 mSystemServiceManager.startService(LauncherAppsService.class);
1540 traceEnd();
1541
1542 traceBeginAndSlog("StartCrossProfileAppsService");
1543 mSystemServiceManager.startService(CrossProfileAppsService.class);
1544 traceEnd();
1545 }
1546
1547 if (!isWatch) {
1548 traceBeginAndSlog("StartMediaProjectionManager");
1549 mSystemServiceManager.startService(MediaProjectionManagerService.class);
1550 traceEnd();
1551 }
1552
1553 if (isWatch) {
1554 traceBeginAndSlog("StartWearConfigService");
1555 mSystemServiceManager.startService(WEAR_CONFIG_SERVICE_CLASS);
1556 traceEnd();
1557
1558 traceBeginAndSlog("StartWearConnectivityService");
1559 mSystemServiceManager.startService(WEAR_CONNECTIVITY_SERVICE_CLASS);
1560 traceEnd();
1561
1562 traceBeginAndSlog("StartWearTimeService");
1563 mSystemServiceManager.startService(WEAR_DISPLAY_SERVICE_CLASS);
1564 mSystemServiceManager.startService(WEAR_TIME_SERVICE_CLASS);
1565 traceEnd();
1566
1567 if (enableLeftyService) {
1568 traceBeginAndSlog("StartWearLeftyService");
1569 mSystemServiceManager.startService(WEAR_LEFTY_SERVICE_CLASS);
1570 traceEnd();
1571 }
1572
1573 traceBeginAndSlog("StartWearGlobalActionsService");
1574 mSystemServiceManager.startService(WEAR_GLOBAL_ACTIONS_SERVICE_CLASS);
1575 traceEnd();
1576 }
1577
1578 if (!disableSlices) {
1579 traceBeginAndSlog("StartSliceManagerService");
1580 mSystemServiceManager.startService(SLICE_MANAGER_SERVICE_CLASS);
1581 traceEnd();
1582 }
1583
1584 if (!disableCameraService) {
1585 traceBeginAndSlog("StartCameraServiceProxy");
1586 mSystemServiceManager.startService(CameraServiceProxy.class);
1587 traceEnd();
1588 }
1589
1590 if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_EMBEDDED)) {
1591 traceBeginAndSlog("StartIoTSystemService");
1592 mSystemServiceManager.startService(IOT_SERVICE_CLASS);
1593 traceEnd();
1594 }
1595
1596 // Statsd helper
1597 traceBeginAndSlog("StartStatsCompanionService");
1598 mSystemServiceManager.startService(StatsCompanionService.Lifecycle.class);
1599 traceEnd();
1600
1601 // Before things start rolling, be sure we have decided whether
1602 // we are in safe mode.
1603 final boolean safeMode = wm.detectSafeMode();
1604 if (safeMode) {
1605 traceBeginAndSlog("EnterSafeModeAndDisableJitCompilation");
1606 mActivityManagerService.enterSafeMode();
1607 // Disable the JIT for the system_server process
1608 VMRuntime.getRuntime().disableJitCompilation();
1609 traceEnd();
1610 } else {
1611 // Enable the JIT for the system_server process
1612 traceBeginAndSlog("StartJitCompilation");
1613 VMRuntime.getRuntime().startJitCompilation();
1614 traceEnd();
1615 }
1616
1617 // MMS service broker
1618 traceBeginAndSlog("StartMmsService");
1619 mmsService = mSystemServiceManager.startService(MmsServiceBroker.class);
1620 traceEnd();
1621
1622 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_AUTOFILL)) {
1623 traceBeginAndSlog("StartAutoFillService");
1624 mSystemServiceManager.startService(AUTO_FILL_MANAGER_SERVICE_CLASS);
1625 traceEnd();
1626 }
1627
1628 // It is now time to start up the app processes...
1629
1630 traceBeginAndSlog("MakeVibratorServiceReady");
1631 try {
1632 vibrator.systemReady();
1633 } catch (Throwable e) {
1634 reportWtf("making Vibrator Service ready", e);
1635 }
1636 traceEnd();
1637
1638 traceBeginAndSlog("MakeLockSettingsServiceReady");
1639 if (lockSettings != null) {
1640 try {
1641 lockSettings.systemReady();
1642 } catch (Throwable e) {
1643 reportWtf("making Lock Settings Service ready", e);
1644 }
1645 }
1646 traceEnd();
1647
1648 // Needed by DevicePolicyManager for initialization
1649 traceBeginAndSlog("StartBootPhaseLockSettingsReady");
1650 mSystemServiceManager.startBootPhase(SystemService.PHASE_LOCK_SETTINGS_READY);
1651 traceEnd();
1652
1653 traceBeginAndSlog("StartBootPhaseSystemServicesReady");
1654 mSystemServiceManager.startBootPhase(SystemService.PHASE_SYSTEM_SERVICES_READY);
1655 traceEnd();
1656
1657 traceBeginAndSlog("MakeWindowManagerServiceReady");
1658 try {
1659 wm.systemReady();
1660 } catch (Throwable e) {
1661 reportWtf("making Window Manager Service ready", e);
1662 }
1663 traceEnd();
1664
1665 if (safeMode) {
1666 mActivityManagerService.showSafeModeOverlay();
1667 }
1668
1669 // Update the configuration for this context by hand, because we're going
1670 // to start using it before the config change done in wm.systemReady() will
1671 // propagate to it.
1672 final Configuration config = wm.computeNewConfiguration(DEFAULT_DISPLAY);
1673 DisplayMetrics metrics = new DisplayMetrics();
1674 WindowManager w = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
1675 w.getDefaultDisplay().getMetrics(metrics);
1676 context.getResources().updateConfiguration(config, metrics);
1677
1678 // The system context's theme may be configuration-dependent.
1679 final Theme systemTheme = context.getTheme();
1680 if (systemTheme.getChangingConfigurations() != 0) {
1681 systemTheme.rebase();
1682 }
1683
1684 traceBeginAndSlog("MakePowerManagerServiceReady");
1685 try {
1686 // TODO: use boot phase
1687 mPowerManagerService.systemReady(mActivityManagerService.getAppOpsService());
1688 } catch (Throwable e) {
1689 reportWtf("making Power Manager Service ready", e);
1690 }
1691 traceEnd();
1692
1693 traceBeginAndSlog("MakePackageManagerServiceReady");
1694 mPackageManagerService.systemReady();
1695 traceEnd();
1696
1697 traceBeginAndSlog("MakeDisplayManagerServiceReady");
1698 try {
1699 // TODO: use boot phase and communicate these flags some other way
1700 mDisplayManagerService.systemReady(safeMode, mOnlyCore);
1701 } catch (Throwable e) {
1702 reportWtf("making Display Manager Service ready", e);
1703 }
1704 traceEnd();
1705
1706 mSystemServiceManager.setSafeMode(safeMode);
1707
1708 // Start device specific services
1709 traceBeginAndSlog("StartDeviceSpecificServices");
1710 final String[] classes = mSystemContext.getResources().getStringArray(
1711 R.array.config_deviceSpecificSystemServices);
1712 for (final String className : classes) {
1713 traceBeginAndSlog("StartDeviceSpecificServices " + className);
1714 try {
1715 mSystemServiceManager.startService(className);
1716 } catch (Throwable e) {
1717 reportWtf("starting " + className, e);
1718 }
1719 traceEnd();
1720 }
1721 traceEnd();
1722
1723 traceBeginAndSlog("StartBootPhaseDeviceSpecificServicesReady");
1724 mSystemServiceManager.startBootPhase(SystemService.PHASE_DEVICE_SPECIFIC_SERVICES_READY);
1725 traceEnd();
1726
1727 // These are needed to propagate to the runnable below.
1728 final NetworkManagementService networkManagementF = networkManagement;
1729 final NetworkStatsService networkStatsF = networkStats;
1730 final NetworkPolicyManagerService networkPolicyF = networkPolicy;
1731 final ConnectivityService connectivityF = connectivity;
1732 final LocationManagerService locationF = location;
1733 final CountryDetectorService countryDetectorF = countryDetector;
1734 final NetworkTimeUpdateService networkTimeUpdaterF = networkTimeUpdater;
1735 final CommonTimeManagementService commonTimeMgmtServiceF = commonTimeMgmtService;
1736 final InputManagerService inputManagerF = inputManager;
1737 final TelephonyRegistry telephonyRegistryF = telephonyRegistry;
1738 final MediaRouterService mediaRouterF = mediaRouter;
1739 final MmsServiceBroker mmsServiceF = mmsService;
1740 final IpSecService ipSecServiceF = ipSecService;
1741 final WindowManagerService windowManagerF = wm;
1742
1743 // We now tell the activity manager it is okay to run third party
1744 // code. It will call back into us once it has gotten to the state
1745 // where third party code can really run (but before it has actually
1746 // started launching the initial applications), for us to complete our
1747 // initialization.
1748 mActivityManagerService.systemReady(() -> {
1749 Slog.i(TAG, "Making services ready");
1750 traceBeginAndSlog("StartActivityManagerReadyPhase");
1751 mSystemServiceManager.startBootPhase(
1752 SystemService.PHASE_ACTIVITY_MANAGER_READY);
1753 traceEnd();
1754 traceBeginAndSlog("StartObservingNativeCrashes");
1755 try {
1756 mActivityManagerService.startObservingNativeCrashes();
1757 } catch (Throwable e) {
1758 reportWtf("observing native crashes", e);
1759 }
1760 traceEnd();
1761
1762 // No dependency on Webview preparation in system server. But this should
1763 // be completed before allowing 3rd party
1764 final String WEBVIEW_PREPARATION = "WebViewFactoryPreparation";
1765 Future<?> webviewPrep = null;
1766 if (!mOnlyCore && mWebViewUpdateService != null) {
1767 webviewPrep = SystemServerInitThreadPool.get().submit(() -> {
1768 Slog.i(TAG, WEBVIEW_PREPARATION);
1769 TimingsTraceLog traceLog = new TimingsTraceLog(
1770 SYSTEM_SERVER_TIMING_ASYNC_TAG, Trace.TRACE_TAG_SYSTEM_SERVER);
1771 traceLog.traceBegin(WEBVIEW_PREPARATION);
1772 ConcurrentUtils.waitForFutureNoInterrupt(mZygotePreload, "Zygote preload");
1773 mZygotePreload = null;
1774 mWebViewUpdateService.prepareWebViewInSystemServer();
1775 traceLog.traceEnd();
1776 }, WEBVIEW_PREPARATION);
1777 }
1778
1779 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE)) {
1780 traceBeginAndSlog("StartCarServiceHelperService");
1781 mSystemServiceManager.startService(CAR_SERVICE_HELPER_SERVICE_CLASS);
1782 traceEnd();
1783 }
1784
1785 traceBeginAndSlog("StartSystemUI");
1786 try {
1787 startSystemUi(context, windowManagerF);
1788 } catch (Throwable e) {
1789 reportWtf("starting System UI", e);
1790 }
1791 traceEnd();
1792 traceBeginAndSlog("MakeNetworkManagementServiceReady");
1793 try {
1794 if (networkManagementF != null) networkManagementF.systemReady();
1795 } catch (Throwable e) {
1796 reportWtf("making Network Managment Service ready", e);
1797 }
1798 CountDownLatch networkPolicyInitReadySignal = null;
1799 if (networkPolicyF != null) {
1800 networkPolicyInitReadySignal = networkPolicyF
1801 .networkScoreAndNetworkManagementServiceReady();
1802 }
1803 traceEnd();
1804 traceBeginAndSlog("MakeIpSecServiceReady");
1805 try {
1806 if (ipSecServiceF != null) ipSecServiceF.systemReady();
1807 } catch (Throwable e) {
1808 reportWtf("making IpSec Service ready", e);
1809 }
1810 traceEnd();
1811 traceBeginAndSlog("MakeNetworkStatsServiceReady");
1812 try {
1813 if (networkStatsF != null) networkStatsF.systemReady();
1814 } catch (Throwable e) {
1815 reportWtf("making Network Stats Service ready", e);
1816 }
1817 traceEnd();
1818 traceBeginAndSlog("MakeConnectivityServiceReady");
1819 try {
1820 if (connectivityF != null) connectivityF.systemReady();
1821 } catch (Throwable e) {
1822 reportWtf("making Connectivity Service ready", e);
1823 }
1824 traceEnd();
1825 traceBeginAndSlog("MakeNetworkPolicyServiceReady");
1826 try {
1827 if (networkPolicyF != null) {
1828 networkPolicyF.systemReady(networkPolicyInitReadySignal);
1829 }
1830 } catch (Throwable e) {
1831 reportWtf("making Network Policy Service ready", e);
1832 }
1833 traceEnd();
1834
1835 traceBeginAndSlog("StartWatchdog");
1836 Watchdog.getInstance().start();
1837 traceEnd();
1838
1839 // Wait for all packages to be prepared
1840 mPackageManagerService.waitForAppDataPrepared();
1841
1842 // It is now okay to let the various system services start their
1843 // third party code...
1844 traceBeginAndSlog("PhaseThirdPartyAppsCanStart");
1845 // confirm webview completion before starting 3rd party
1846 if (webviewPrep != null) {
1847 ConcurrentUtils.waitForFutureNoInterrupt(webviewPrep, WEBVIEW_PREPARATION);
1848 }
1849 mSystemServiceManager.startBootPhase(
1850 SystemService.PHASE_THIRD_PARTY_APPS_CAN_START);
1851 traceEnd();
1852
1853 traceBeginAndSlog("MakeLocationServiceReady");
1854 try {
1855 if (locationF != null) locationF.systemRunning();
1856 } catch (Throwable e) {
1857 reportWtf("Notifying Location Service running", e);
1858 }
1859 traceEnd();
1860 traceBeginAndSlog("MakeCountryDetectionServiceReady");
1861 try {
1862 if (countryDetectorF != null) countryDetectorF.systemRunning();
1863 } catch (Throwable e) {
1864 reportWtf("Notifying CountryDetectorService running", e);
1865 }
1866 traceEnd();
1867 traceBeginAndSlog("MakeNetworkTimeUpdateReady");
1868 try {
1869 if (networkTimeUpdaterF != null) networkTimeUpdaterF.systemRunning();
1870 } catch (Throwable e) {
1871 reportWtf("Notifying NetworkTimeService running", e);
1872 }
1873 traceEnd();
1874 traceBeginAndSlog("MakeCommonTimeManagementServiceReady");
1875 try {
1876 if (commonTimeMgmtServiceF != null) {
1877 commonTimeMgmtServiceF.systemRunning();
1878 }
1879 } catch (Throwable e) {
1880 reportWtf("Notifying CommonTimeManagementService running", e);
1881 }
1882 traceEnd();
1883 traceBeginAndSlog("MakeInputManagerServiceReady");
1884 try {
1885 // TODO(BT) Pass parameter to input manager
1886 if (inputManagerF != null) inputManagerF.systemRunning();
1887 } catch (Throwable e) {
1888 reportWtf("Notifying InputManagerService running", e);
1889 }
1890 traceEnd();
1891 traceBeginAndSlog("MakeTelephonyRegistryReady");
1892 try {
1893 if (telephonyRegistryF != null) telephonyRegistryF.systemRunning();
1894 } catch (Throwable e) {
1895 reportWtf("Notifying TelephonyRegistry running", e);
1896 }
1897 traceEnd();
1898 traceBeginAndSlog("MakeMediaRouterServiceReady");
1899 try {
1900 if (mediaRouterF != null) mediaRouterF.systemRunning();
1901 } catch (Throwable e) {
1902 reportWtf("Notifying MediaRouterService running", e);
1903 }
1904 traceEnd();
1905 traceBeginAndSlog("MakeMmsServiceReady");
1906 try {
1907 if (mmsServiceF != null) mmsServiceF.systemRunning();
1908 } catch (Throwable e) {
1909 reportWtf("Notifying MmsService running", e);
1910 }
1911 traceEnd();
1912
1913 traceBeginAndSlog("IncidentDaemonReady");
1914 try {
1915 // TODO: Switch from checkService to getService once it's always
1916 // in the build and should reliably be there.
1917 final IIncidentManager incident = IIncidentManager.Stub.asInterface(
1918 ServiceManager.getService(Context.INCIDENT_SERVICE));
1919 if (incident != null) incident.systemRunning();
1920 } catch (Throwable e) {
1921 reportWtf("Notifying incident daemon running", e);
1922 }
1923 traceEnd();
1924 }, BOOT_TIMINGS_TRACE_LOG);
1925 }
这里代码高达1200+行(不用全看)，启动了应用层使用的各种服务几十个，主要有KeyChainSystemService、TelecomLoaderService、AccountManagerService、ContentService、DropBoxManagerService、VibratorService、AlarmManagerService、Watchdog、 InputManagerService、WindowManagerService、IpConnectivityMetrics、NetworkWatchlistService、PinnerService等服务。mActivityManagerService.systemReady()方法后80多个服务已经创建并启动了，需要注意：并不是所有的服务都一定是startService启动。
mActivityManagerService.systemReady()方法中通过startHomeActivityLocked(currentUserId, "systemReady") 启动了Launch.java。接下来就使用execute进行APP初始化操作比如：socket通信，Binder通信，zgote fork 进程，冷启动，热启动
2 车载服务启动
车载服务的启动也归属于其它服务，在startOtherServices()方法被启动。
1779 if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE)) {
1780 traceBeginAndSlog("StartCarServiceHelperService");
1781 mSystemServiceManager.startService(CAR_SERVICE_HELPER_SERVICE_CLASS);
1782 traceEnd();
1783 }
在车载服务创建启动前，判断是否为车载平台，是则通过反射com.android.internal.car.CarServiceHelperService服务名进行创建。下面我们来看看CarServiceHelperService车载服务类：
33/**
34 * System service side companion service for CarService.
35 * Starts car service and provide necessary API for CarService. Only for car product.
36 */
37public class CarServiceHelperService extends SystemService {
38 private static final String TAG = "CarServiceHelper";
39 private static final String CAR_SERVICE_INTERFACE = "android.car.ICar";
40 private final ICarServiceHelperImpl mHelper = new ICarServiceHelperImpl();
41 private final Context mContext;
42 private IBinder mCarService;
43 private final ServiceConnection mCarServiceConnection = new ServiceConnection() {
44
45 @Override
46 public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
47 Slog.i(TAG, "**CarService connected**");
48 mCarService = iBinder;
49 // Cannot depend on ICar which is defined in CarService, so handle binder call directly
50 // instead.
51 // void setCarServiceHelper(in IBinder helper)
52 Parcel data = Parcel.obtain();
53 data.writeInterfaceToken(CAR_SERVICE_INTERFACE);
54 data.writeStrongBinder(mHelper.asBinder());
55 try {
56 mCarService.transact(IBinder.FIRST_CALL_TRANSACTION, // setCarServiceHelper
57 data, null, Binder.FLAG_ONEWAY);
58 } catch (RemoteException e) {
59 Slog.w(TAG, "RemoteException from car service", e);
60 handleCarServiceCrash();
61 }
62 }
63
64 @Override
65 public void onServiceDisconnected(ComponentName componentName) {
66 handleCarServiceCrash();
67 }
68 };
69
70 public CarServiceHelperService(Context context) {
71 super(context);
72 mContext = context;
73 }
74
75 @Override
76 public void onStart() {
77 Intent intent = new Intent();
78 intent.setPackage("com.android.car");
79 intent.setAction(CAR_SERVICE_INTERFACE);
80 if (!getContext().bindServiceAsUser(intent, mCarServiceConnection, Context.BIND_AUTO_CREATE,
81 UserHandle.SYSTEM)) {
82 Slog.wtf(TAG, "cannot start car service");
83 }
84 System.loadLibrary("car-framework-service-jni");
85 }
86
87 private void handleCarServiceCrash() {
88 //TODO define recovery bahavior
89 }
90
91 private static native int nativeForceSuspend(int timeoutMs);
92
93 private class ICarServiceHelperImpl extends ICarServiceHelper.Stub {
94 /**
95 * Force device to suspend
96 *
97 * @param timeoutMs
98 */
99 @Override // Binder call
100 public int forceSuspend(int timeoutMs) {
101 int retVal;
102 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
103 final long ident = Binder.clearCallingIdentity();
104 try {
105 retVal = nativeForceSuspend(timeoutMs);
106 } finally {
107 Binder.restoreCallingIdentity(ident);
108 }
109 return retVal;
110 }
111 }
112}
在onStart方法中
intent.setPackage("com.android.car");
intent.setAction(CAR_SERVICE_INTERFACE);
通过这个常量转向car服务相关的代码
风语者！平时喜欢研究各种技术，目前在从事后端开发工作，热爱生活、热爱工作。
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