Android启动续-------SystemSever启动
16lz
2021-01-23
Android启动续-------SystemSever启动
诚如上一篇，我们说到Zygote的启动，我们可以看到 目录（/android/4.4/frameworks/base/core/java/com/android/internal/os/ZygoteInit.java) public class ZygoteInit {public static void main(String argv[]) { try { // Start profiling the zygote initialization. SamplingProfilerIntegration.start(); registerZygoteSocket(); EventLog.writeEvent(LOG_BOOT_PROGRESS_PRELOAD_START, SystemClock.uptimeMillis()); preload(); EventLog.writeEvent(LOG_BOOT_PROGRESS_PRELOAD_END, SystemClock.uptimeMillis()); // Finish profiling the zygote initialization. SamplingProfilerIntegration.writeZygoteSnapshot(); // Do an initial gc to clean up after startup gc(); // Disable tracing so that forked processes do not inherit stale tracing tags from // Zygote. Trace.setTracingEnabled(false); // If requested, start system server directly from Zygote if (argv.length != 2) { throw new RuntimeException(argv[0] + USAGE_STRING); } if (argv[1].equals("start-system-server")) { startSystemServer(); } else if (!argv[1].equals("")) { throw new RuntimeException(argv[0] + USAGE_STRING); } Log.i(TAG, "Accepting command socket connections"); runSelectLoop(); closeServerSocket(); } catch (MethodAndArgsCaller caller) { caller.run(); } catch (RuntimeException ex) { Log.e(TAG, "Zygote died with exception", ex); closeServerSocket(); throw ex; } }}毫无疑问，这里我们的重点在
startSystemServer();目录/android/4.4/frameworks/base/services/java/com/android/server/SystemServer.java
class ServerThread {80 private static final String TAG = "SystemServer";81 private static final String ENCRYPTING_STATE = "trigger_restart_min_framework";82 private static final String ENCRYPTED_STATE = "1";8384 ContentResolver mContentResolver;8586 void reportWtf(String msg, Throwable e) {87 Slog.w(TAG, "***********************************************");88 Log.wtf(TAG, "BOOT FAILURE " + msg, e);89 }9091 public void initAndLoop() {92 EventLog.writeEvent(EventLogTags.BOOT_PROGRESS_SYSTEM_RUN,93 SystemClock.uptimeMillis());9495 Looper.prepareMainLooper();9697 android.os.Process.setThreadPriority(98 android.os.Process.THREAD_PRIORITY_FOREGROUND);99100 BinderInternal.disableBackgroundScheduling(true);101 android.os.Process.setCanSelfBackground(false);102103 // Check whether we failed to shut down last time we tried.104 {105 final String shutdownAction = SystemProperties.get(106 ShutdownThread.SHUTDOWN_ACTION_PROPERTY, "");107 if (shutdownAction != null && shutdownAction.length() > 0) {108 boolean reboot = (shutdownAction.charAt(0) == '1');109110 final String reason;111 if (shutdownAction.length() > 1) {112 reason = shutdownAction.substring(1, shutdownAction.length());113 } else {114 reason = null;115 }116117 ShutdownThread.rebootOrShutdown(reboot, reason);118 }119 }120121 String factoryTestStr = SystemProperties.get("ro.factorytest");122 int factoryTest = "".equals(factoryTestStr) ? SystemServer.FACTORY_TEST_OFF123 : Integer.parseInt(factoryTestStr);124 final boolean headless = "1".equals(SystemProperties.get("ro.config.headless", "0"));125126 Installer installer = null;127 AccountManagerService accountManager = null;128 ContentService contentService = null;129 LightsService lights = null;130 PowerManagerService power = null;131 DisplayManagerService display = null;132 BatteryService battery = null;133 VibratorService vibrator = null;134 AlarmManagerService alarm = null;135 MountService mountService = null;136 NetworkManagementService networkManagement = null;137 NetworkStatsService networkStats = null;138 NetworkPolicyManagerService networkPolicy = null;139 ConnectivityService connectivity = null;140 WifiP2pService wifiP2p = null;141 WifiService wifi = null;142 NsdService serviceDiscovery= null;143 IPackageManager pm = null;144 Context context = null;145 WindowManagerService wm = null;146 BluetoothManagerService bluetooth = null;147 DockObserver dock = null;148 UsbService usb = null;149 SerialService serial = null;150 TwilightService twilight = null;151 UiModeManagerService uiMode = null;152 RecognitionManagerService recognition = null;153 NetworkTimeUpdateService networkTimeUpdater = null;154 CommonTimeManagementService commonTimeMgmtService = null;155 InputManagerService inputManager = null;156 TelephonyRegistry telephonyRegistry = null;157 ConsumerIrService consumerIr = null;158159 // Create a handler thread just for the window manager to enjoy.160 HandlerThread wmHandlerThread = new HandlerThread("WindowManager");161 wmHandlerThread.start();162 Handler wmHandler = new Handler(wmHandlerThread.getLooper());163 wmHandler.post(new Runnable() {164 @Override165 public void run() {166 //Looper.myLooper().setMessageLogging(new LogPrinter(167 // android.util.Log.DEBUG, TAG, android.util.Log.LOG_ID_SYSTEM));168 android.os.Process.setThreadPriority(169 android.os.Process.THREAD_PRIORITY_DISPLAY);170 android.os.Process.setCanSelfBackground(false);171172 // For debug builds, log event loop stalls to dropbox for analysis.173 if (StrictMode.conditionallyEnableDebugLogging()) {174 Slog.i(TAG, "Enabled StrictMode logging for WM Looper");175 }176 }177 });178179 // bootstrap services180 boolean onlyCore = false;181 boolean firstBoot = false;182 try {183 // Wait for installd to finished starting up so that it has a chance to184 // create critical directories such as /data/user with the appropriate185 // permissions. We need this to complete before we initialize other services.186 Slog.i(TAG, "Waiting for installd to be ready.");187 installer = new Installer();188 installer.ping();189190 Slog.i(TAG, "Power Manager");191 power = new PowerManagerService();192 ServiceManager.addService(Context.POWER_SERVICE, power);193194 Slog.i(TAG, "Activity Manager");195 context = ActivityManagerService.main(factoryTest);196 } catch (RuntimeException e) {197 Slog.e("System", "******************************************");198 Slog.e("System", "************ Failure starting bootstrap service", e);199 }200201 boolean disableStorage = SystemProperties.getBoolean("config.disable_storage", false);202 boolean disableMedia = SystemProperties.getBoolean("config.disable_media", false);203 boolean disableBluetooth = SystemProperties.getBoolean("config.disable_bluetooth", false);204 boolean disableTelephony = SystemProperties.getBoolean("config.disable_telephony", false);205 boolean disableLocation = SystemProperties.getBoolean("config.disable_location", false);206 boolean disableSystemUI = SystemProperties.getBoolean("config.disable_systemui", false);207 boolean disableNonCoreServices = SystemProperties.getBoolean("config.disable_noncore", false);208 boolean disableNetwork = SystemProperties.getBoolean("config.disable_network", false);209210 try {211 Slog.i(TAG, "Display Manager");212 display = new DisplayManagerService(context, wmHandler);213 ServiceManager.addService(Context.DISPLAY_SERVICE, display, true);214215 Slog.i(TAG, "Telephony Registry");216 telephonyRegistry = new TelephonyRegistry(context);217 ServiceManager.addService("telephony.registry", telephonyRegistry);218219 Slog.i(TAG, "Scheduling Policy");220 ServiceManager.addService("scheduling_policy", new SchedulingPolicyService());221222 AttributeCache.init(context);223224 if (!display.waitForDefaultDisplay()) {225 reportWtf("Timeout waiting for default display to be initialized.",226 new Throwable());227 }228229 Slog.i(TAG, "Package Manager");230 // Only run "core" apps if we're encrypting the device.231 String cryptState = SystemProperties.get("vold.decrypt");232 if (ENCRYPTING_STATE.equals(cryptState)) {233 Slog.w(TAG, "Detected encryption in progress - only parsing core apps");234 onlyCore = true;235 } else if (ENCRYPTED_STATE.equals(cryptState)) {236 Slog.w(TAG, "Device encrypted - only parsing core apps");237 onlyCore = true;238 }239240 pm = PackageManagerService.main(context, installer,241 factoryTest != SystemServer.FACTORY_TEST_OFF,242 onlyCore);243 try {244 firstBoot = pm.isFirstBoot();245 } catch (RemoteException e) {246 }247248 ActivityManagerService.setSystemProcess();249250 Slog.i(TAG, "Entropy Mixer");251 ServiceManager.addService("entropy", new EntropyMixer(context));252253 Slog.i(TAG, "User Service");254 ServiceManager.addService(Context.USER_SERVICE,255 UserManagerService.getInstance());256257 mContentResolver = context.getContentResolver();258259 // The AccountManager must come before the ContentService260 try {261 // TODO: seems like this should be disable-able, but req'd by ContentService262 Slog.i(TAG, "Account Manager");263 accountManager = new AccountManagerService(context);264 ServiceManager.addService(Context.ACCOUNT_SERVICE, accountManager);265 } catch (Throwable e) {266 Slog.e(TAG, "Failure starting Account Manager", e);267 }268269 Slog.i(TAG, "Content Manager");270 contentService = ContentService.main(context,271 factoryTest == SystemServer.FACTORY_TEST_LOW_LEVEL);272273 Slog.i(TAG, "System Content Providers");274 ActivityManagerService.installSystemProviders();275276 Slog.i(TAG, "Lights Service");277 lights = new LightsService(context);278279 Slog.i(TAG, "Battery Service");280 battery = new BatteryService(context, lights);281 ServiceManager.addService("battery", battery);282283 Slog.i(TAG, "Vibrator Service");284 vibrator = new VibratorService(context);285 ServiceManager.addService("vibrator", vibrator);286287 Slog.i(TAG, "Consumer IR Service");288 consumerIr = new ConsumerIrService(context);289 ServiceManager.addService(Context.CONSUMER_IR_SERVICE, consumerIr);290291 // only initialize the power service after we have started the292 // lights service, content providers and the battery service.293 power.init(context, lights, ActivityManagerService.self(), battery,294 BatteryStatsService.getService(),295 ActivityManagerService.self().getAppOpsService(), display);296297 Slog.i(TAG, "Alarm Manager");298 alarm = new AlarmManagerService(context);299 ServiceManager.addService(Context.ALARM_SERVICE, alarm);300301 Slog.i(TAG, "Init Watchdog");302 Watchdog.getInstance().init(context, battery, power, alarm,303 ActivityManagerService.self());304 Watchdog.getInstance().addThread(wmHandler, "WindowManager thread");305306 Slog.i(TAG, "Input Manager");307 inputManager = new InputManagerService(context, wmHandler);308309 Slog.i(TAG, "Window Manager");310 wm = WindowManagerService.main(context, power, display, inputManager,311 wmHandler, factoryTest != SystemServer.FACTORY_TEST_LOW_LEVEL,312 !firstBoot, onlyCore);313 ServiceManager.addService(Context.WINDOW_SERVICE, wm);314 ServiceManager.addService(Context.INPUT_SERVICE, inputManager);315316 ActivityManagerService.self().setWindowManager(wm);317318 inputManager.setWindowManagerCallbacks(wm.getInputMonitor());319 inputManager.start();320321 display.setWindowManager(wm);322 display.setInputManager(inputManager);323324 // Skip Bluetooth if we have an emulator kernel325 // TODO: Use a more reliable check to see if this product should326 // support Bluetooth - see bug 988521327 if (SystemProperties.get("ro.kernel.qemu").equals("1")) {328 Slog.i(TAG, "No Bluetooh Service (emulator)");329 } else if (factoryTest == SystemServer.FACTORY_TEST_LOW_LEVEL) {330 Slog.i(TAG, "No Bluetooth Service (factory test)");331 } else if (!context.getPackageManager().hasSystemFeature332 (PackageManager.FEATURE_BLUETOOTH)) {333 Slog.i(TAG, "No Bluetooth Service (Bluetooth Hardware Not Present)");334 } else if (disableBluetooth) {335 Slog.i(TAG, "Bluetooth Service disabled by config");336 } else {337 Slog.i(TAG, "Bluetooth Manager Service");338 bluetooth = new BluetoothManagerService(context);339 ServiceManager.addService(BluetoothAdapter.BLUETOOTH_MANAGER_SERVICE, bluetooth);340 }341 } catch (RuntimeException e) {342 Slog.e("System", "******************************************");343 Slog.e("System", "************ Failure starting core service", e);344 }345346 DevicePolicyManagerService devicePolicy = null;347 StatusBarManagerService statusBar = null;348 InputMethodManagerService imm = null;349 AppWidgetService appWidget = null;350 NotificationManagerService notification = null;351 WallpaperManagerService wallpaper = null;352 LocationManagerService location = null;353 CountryDetectorService countryDetector = null;354 TextServicesManagerService tsms = null;355 LockSettingsService lockSettings = null;356 DreamManagerService dreamy = null;357 AssetAtlasService atlas = null;358 PrintManagerService printManager = null;359360 // Bring up services needed for UI.361 if (factoryTest != SystemServer.FACTORY_TEST_LOW_LEVEL) {362 //if (!disableNonCoreServices) { // TODO: View depends on these; mock them?363 if (true) {364 try {365 Slog.i(TAG, "Input Method Service");366 imm = new InputMethodManagerService(context, wm);367 ServiceManager.addService(Context.INPUT_METHOD_SERVICE, imm);368 } catch (Throwable e) {369 reportWtf("starting Input Manager Service", e);370 }371372 try {373 Slog.i(TAG, "Accessibility Manager");374 ServiceManager.addService(Context.ACCESSIBILITY_SERVICE,375 new AccessibilityManagerService(context));376 } catch (Throwable e) {377 reportWtf("starting Accessibility Manager", e);378 }379 }380 }381382 try {383 wm.displayReady();384 } catch (Throwable e) {385 reportWtf("making display ready", e);386 }387388 try {389 pm.performBootDexOpt();390 } catch (Throwable e) {391 reportWtf("performing boot dexopt", e);392 }393394 try {395 ActivityManagerNative.getDefault().showBootMessage(396 context.getResources().getText(397 com.android.internal.R.string.android_upgrading_starting_apps),398 false);399 } catch (RemoteException e) {400 }401402 if (factoryTest != SystemServer.FACTORY_TEST_LOW_LEVEL) {403 if (!disableStorage &&404 !"0".equals(SystemProperties.get("system_init.startmountservice"))) {405 try {406 /*407 * NotificationManagerService is dependant on MountService,408 * (for media / usb notifications) so we must start MountService first.409 */410 Slog.i(TAG, "Mount Service");411 mountService = new MountService(context);412 ServiceManager.addService("mount", mountService);413 } catch (Throwable e) {414 reportWtf("starting Mount Service", e);415 }416 }417418 if (!disableNonCoreServices) {419 try {420 Slog.i(TAG, "LockSettingsService");421 lockSettings = new LockSettingsService(context);422 ServiceManager.addService("lock_settings", lockSettings);423 } catch (Throwable e) {424 reportWtf("starting LockSettingsService service", e);425 }426427 try {428 Slog.i(TAG, "Device Policy");429 devicePolicy = new DevicePolicyManagerService(context);430 ServiceManager.addService(Context.DEVICE_POLICY_SERVICE, devicePolicy);431 } catch (Throwable e) {432 reportWtf("starting DevicePolicyService", e);433 }434 }435436 if (!disableSystemUI) {437 try {438 Slog.i(TAG, "Status Bar");439 statusBar = new StatusBarManagerService(context, wm);440 ServiceManager.addService(Context.STATUS_BAR_SERVICE, statusBar);441 } catch (Throwable e) {442 reportWtf("starting StatusBarManagerService", e);443 }444 }445446 if (!disableNonCoreServices) {447 try {448 Slog.i(TAG, "Clipboard Service");449 ServiceManager.addService(Context.CLIPBOARD_SERVICE,450 new ClipboardService(context));451 } catch (Throwable e) {452 reportWtf("starting Clipboard Service", e);453 }454 }455456 if (!disableNetwork) {457 try {458 Slog.i(TAG, "NetworkManagement Service");459 networkManagement = NetworkManagementService.create(context);460 ServiceManager.addService(Context.NETWORKMANAGEMENT_SERVICE, networkManagement);461 } catch (Throwable e) {462 reportWtf("starting NetworkManagement Service", e);463 }464 }465466 if (!disableNonCoreServices) {467 try {468 Slog.i(TAG, "Text Service Manager Service");469 tsms = new TextServicesManagerService(context);470 ServiceManager.addService(Context.TEXT_SERVICES_MANAGER_SERVICE, tsms);471 } catch (Throwable e) {472 reportWtf("starting Text Service Manager Service", e);473 }474 }475476 if (!disableNetwork) {477 try {478 Slog.i(TAG, "NetworkStats Service");479 networkStats = new NetworkStatsService(context, networkManagement, alarm);480 ServiceManager.addService(Context.NETWORK_STATS_SERVICE, networkStats);481 } catch (Throwable e) {482 reportWtf("starting NetworkStats Service", e);483 }484485 try {486 Slog.i(TAG, "NetworkPolicy Service");487 networkPolicy = new NetworkPolicyManagerService(488 context, ActivityManagerService.self(), power,489 networkStats, networkManagement);490 ServiceManager.addService(Context.NETWORK_POLICY_SERVICE, networkPolicy);491 } catch (Throwable e) {492 reportWtf("starting NetworkPolicy Service", e);493 }494495 try {496 Slog.i(TAG, "Wi-Fi P2pService");497 wifiP2p = new WifiP2pService(context);498 ServiceManager.addService(Context.WIFI_P2P_SERVICE, wifiP2p);499 } catch (Throwable e) {500 reportWtf("starting Wi-Fi P2pService", e);501 }502503 try {504 Slog.i(TAG, "Wi-Fi Service");505 wifi = new WifiService(context);506 ServiceManager.addService(Context.WIFI_SERVICE, wifi);507 } catch (Throwable e) {508 reportWtf("starting Wi-Fi Service", e);509 }510511 try {512 Slog.i(TAG, "Connectivity Service");513 connectivity = new ConnectivityService(514 context, networkManagement, networkStats, networkPolicy);515 ServiceManager.addService(Context.CONNECTIVITY_SERVICE, connectivity);516 networkStats.bindConnectivityManager(connectivity);517 networkPolicy.bindConnectivityManager(connectivity);518519 wifiP2p.connectivityServiceReady();520 wifi.checkAndStartWifi();521 } catch (Throwable e) {522 reportWtf("starting Connectivity Service", e);523 }524525 try {526 Slog.i(TAG, "Network Service Discovery Service");527 serviceDiscovery = NsdService.create(context);528 ServiceManager.addService(529 Context.NSD_SERVICE, serviceDiscovery);530 } catch (Throwable e) {531 reportWtf("starting Service Discovery Service", e);532 }533 }534535 if (!disableNonCoreServices) {536 try {537 Slog.i(TAG, "UpdateLock Service");538 ServiceManager.addService(Context.UPDATE_LOCK_SERVICE,539 new UpdateLockService(context));540 } catch (Throwable e) {541 reportWtf("starting UpdateLockService", e);542 }543 }544545 /*546 * MountService has a few dependencies: Notification Manager and547 * AppWidget Provider. Make sure MountService is completely started548 * first before continuing.549 */550 if (mountService != null && !onlyCore) {551 mountService.waitForAsecScan();552 }553554 try {555 if (accountManager != null)556 accountManager.systemReady();557 } catch (Throwable e) {558 reportWtf("making Account Manager Service ready", e);559 }560561 try {562 if (contentService != null)563 contentService.systemReady();564 } catch (Throwable e) {565 reportWtf("making Content Service ready", e);566 }567568 try {569 Slog.i(TAG, "Notification Manager");570 notification = new NotificationManagerService(context, statusBar, lights);571 ServiceManager.addService(Context.NOTIFICATION_SERVICE, notification);572 networkPolicy.bindNotificationManager(notification);573 } catch (Throwable e) {574 reportWtf("starting Notification Manager", e);575 }576577 try {578 Slog.i(TAG, "Device Storage Monitor");579 ServiceManager.addService(DeviceStorageMonitorService.SERVICE,580 new DeviceStorageMonitorService(context));581 } catch (Throwable e) {582 reportWtf("starting DeviceStorageMonitor service", e);583 }584585 if (!disableLocation) {586 try {587 Slog.i(TAG, "Location Manager");588 location = new LocationManagerService(context);589 ServiceManager.addService(Context.LOCATION_SERVICE, location);590 } catch (Throwable e) {591 reportWtf("starting Location Manager", e);592 }593594 try {595 Slog.i(TAG, "Country Detector");596 countryDetector = new CountryDetectorService(context);597 ServiceManager.addService(Context.COUNTRY_DETECTOR, countryDetector);598 } catch (Throwable e) {599 reportWtf("starting Country Detector", e);600 }601 }602603 if (!disableNonCoreServices) {604 try {605 Slog.i(TAG, "Search Service");606 ServiceManager.addService(Context.SEARCH_SERVICE,607 new SearchManagerService(context));608 } catch (Throwable e) {609 reportWtf("starting Search Service", e);610 }611 }612613 try {614 Slog.i(TAG, "DropBox Service");615 ServiceManager.addService(Context.DROPBOX_SERVICE,616 new DropBoxManagerService(context, new File("/data/system/dropbox")));617 } catch (Throwable e) {618 reportWtf("starting DropBoxManagerService", e);619 }620621 if (!disableNonCoreServices && context.getResources().getBoolean(622 R.bool.config_enableWallpaperService)) {623 try {624 Slog.i(TAG, "Wallpaper Service");625 if (!headless) {626 wallpaper = new WallpaperManagerService(context);627 ServiceManager.addService(Context.WALLPAPER_SERVICE, wallpaper);628 }629 } catch (Throwable e) {630 reportWtf("starting Wallpaper Service", e);631 }632 }633634 if (!disableMedia && !"0".equals(SystemProperties.get("system_init.startaudioservice"))) {635 try {636 Slog.i(TAG, "Audio Service");637 ServiceManager.addService(Context.AUDIO_SERVICE, new AudioService(context));638 } catch (Throwable e) {639 reportWtf("starting Audio Service", e);640 }641 }642643 if (!disableNonCoreServices) {644 try {645 Slog.i(TAG, "Dock Observer");646 // Listen for dock station changes647 dock = new DockObserver(context);648 } catch (Throwable e) {649 reportWtf("starting DockObserver", e);650 }651 }652653 if (!disableMedia) {654 try {655 Slog.i(TAG, "Wired Accessory Manager");656 // Listen for wired headset changes657 inputManager.setWiredAccessoryCallbacks(658 new WiredAccessoryManager(context, inputManager));659 } catch (Throwable e) {660 reportWtf("starting WiredAccessoryManager", e);661 }662 }663664 if (!disableNonCoreServices) {665 try {666 Slog.i(TAG, "USB Service");667 // Manage USB host and device support668 usb = new UsbService(context);669 ServiceManager.addService(Context.USB_SERVICE, usb);670 } catch (Throwable e) {671 reportWtf("starting UsbService", e);672 }673674 try {675 Slog.i(TAG, "Serial Service");676 // Serial port support677 serial = new SerialService(context);678 ServiceManager.addService(Context.SERIAL_SERVICE, serial);679 } catch (Throwable e) {680 Slog.e(TAG, "Failure starting SerialService", e);681 }682 }683684 try {685 Slog.i(TAG, "Twilight Service");686 twilight = new TwilightService(context);687 } catch (Throwable e) {688 reportWtf("starting TwilightService", e);689 }690691 try {692 Slog.i(TAG, "UI Mode Manager Service");693 // Listen for UI mode changes694 uiMode = new UiModeManagerService(context, twilight);695 } catch (Throwable e) {696 reportWtf("starting UiModeManagerService", e);697 }698699 if (!disableNonCoreServices) {700 try {701 Slog.i(TAG, "Backup Service");702 ServiceManager.addService(Context.BACKUP_SERVICE,703 new BackupManagerService(context));704 } catch (Throwable e) {705 Slog.e(TAG, "Failure starting Backup Service", e);706 }707708 try {709 Slog.i(TAG, "AppWidget Service");710 appWidget = new AppWidgetService(context);711 ServiceManager.addService(Context.APPWIDGET_SERVICE, appWidget);712 } catch (Throwable e) {713 reportWtf("starting AppWidget Service", e);714 }715716 try {717 Slog.i(TAG, "Recognition Service");718 recognition = new RecognitionManagerService(context);719 } catch (Throwable e) {720 reportWtf("starting Recognition Service", e);721 }722 }723724 try {725 Slog.i(TAG, "DiskStats Service");726 ServiceManager.addService("diskstats", new DiskStatsService(context));727 } catch (Throwable e) {728 reportWtf("starting DiskStats Service", e);729 }730731 try {732 // need to add this service even if SamplingProfilerIntegration.isEnabled()733 // is false, because it is this service that detects system property change and734 // turns on SamplingProfilerIntegration. Plus, when sampling profiler doesn't work,735 // there is little overhead for running this service.736 Slog.i(TAG, "SamplingProfiler Service");737 ServiceManager.addService("samplingprofiler",738 new SamplingProfilerService(context));739 } catch (Throwable e) {740 reportWtf("starting SamplingProfiler Service", e);741 }742743 if (!disableNetwork) {744 try {745 Slog.i(TAG, "NetworkTimeUpdateService");746 networkTimeUpdater = new NetworkTimeUpdateService(context);747 } catch (Throwable e) {748 reportWtf("starting NetworkTimeUpdate service", e);749 }750 }751752 if (!disableMedia) {753 try {754 Slog.i(TAG, "CommonTimeManagementService");755 commonTimeMgmtService = new CommonTimeManagementService(context);756 ServiceManager.addService("commontime_management", commonTimeMgmtService);757 } catch (Throwable e) {758 reportWtf("starting CommonTimeManagementService service", e);759 }760 }761762 if (!disableNetwork) {763 try {764 Slog.i(TAG, "CertBlacklister");765 CertBlacklister blacklister = new CertBlacklister(context);766 } catch (Throwable e) {767 reportWtf("starting CertBlacklister", e);768 }769 }770771 if (!disableNonCoreServices &&772 context.getResources().getBoolean(R.bool.config_dreamsSupported)) {773 try {774 Slog.i(TAG, "Dreams Service");775 // Dreams (interactive idle-time views, a/k/a screen savers)776 dreamy = new DreamManagerService(context, wmHandler);777 ServiceManager.addService(DreamService.DREAM_SERVICE, dreamy);778 } catch (Throwable e) {779 reportWtf("starting DreamManagerService", e);780 }781 }782783 if (!disableNonCoreServices) {784 try {785 Slog.i(TAG, "Assets Atlas Service");786 atlas = new AssetAtlasService(context);787 ServiceManager.addService(AssetAtlasService.ASSET_ATLAS_SERVICE, atlas);788 } catch (Throwable e) {789 reportWtf("starting AssetAtlasService", e);790 }791 }792793 try {794 Slog.i(TAG, "IdleMaintenanceService");795 new IdleMaintenanceService(context, battery);796 } catch (Throwable e) {797 reportWtf("starting IdleMaintenanceService", e);798 }799800 try {801 Slog.i(TAG, "Print Service");802 printManager = new PrintManagerService(context);803 ServiceManager.addService(Context.PRINT_SERVICE, printManager);804 } catch (Throwable e) {805 reportWtf("starting Print Service", e);806 }807 }808809 // Before things start rolling, be sure we have decided whether810 // we are in safe mode.811 final boolean safeMode = wm.detectSafeMode();812 if (safeMode) {813 ActivityManagerService.self().enterSafeMode();814 // Post the safe mode state in the Zygote class815 Zygote.systemInSafeMode = true;816 // Disable the JIT for the system_server process817 VMRuntime.getRuntime().disableJitCompilation();818 } else {819 // Enable the JIT for the system_server process820 VMRuntime.getRuntime().startJitCompilation();821 }822823 // It is now time to start up the app processes...824825 try {826 vibrator.systemReady();827 } catch (Throwable e) {828 reportWtf("making Vibrator Service ready", e);829 }830831 if (lockSettings != null) {832 try {833 lockSettings.systemReady();834 } catch (Throwable e) {835 reportWtf("making Lock Settings Service ready", e);836 }837 }838839 if (devicePolicy != null) {840 try {841 devicePolicy.systemReady();842 } catch (Throwable e) {843 reportWtf("making Device Policy Service ready", e);844 }845 }846847 if (notification != null) {848 try {849 notification.systemReady();850 } catch (Throwable e) {851 reportWtf("making Notification Service ready", e);852 }853 }854855 try {856 wm.systemReady();857 } catch (Throwable e) {858 reportWtf("making Window Manager Service ready", e);859 }860861 if (safeMode) {862 ActivityManagerService.self().showSafeModeOverlay();863 }864865 // Update the configuration for this context by hand, because we're going866 // to start using it before the config change done in wm.systemReady() will867 // propagate to it.868 Configuration config = wm.computeNewConfiguration();869 DisplayMetrics metrics = new DisplayMetrics();870 WindowManager w = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);871 w.getDefaultDisplay().getMetrics(metrics);872 context.getResources().updateConfiguration(config, metrics);873874 try {875 power.systemReady(twilight, dreamy);876 } catch (Throwable e) {877 reportWtf("making Power Manager Service ready", e);878 }879880 try {881 pm.systemReady();882 } catch (Throwable e) {883 reportWtf("making Package Manager Service ready", e);884 }885886 try {887 display.systemReady(safeMode, onlyCore);888 } catch (Throwable e) {889 reportWtf("making Display Manager Service ready", e);890 }891892 // These are needed to propagate to the runnable below.893 final Context contextF = context;894 final MountService mountServiceF = mountService;895 final BatteryService batteryF = battery;896 final NetworkManagementService networkManagementF = networkManagement;897 final NetworkStatsService networkStatsF = networkStats;898 final NetworkPolicyManagerService networkPolicyF = networkPolicy;899 final ConnectivityService connectivityF = connectivity;900 final DockObserver dockF = dock;901 final UsbService usbF = usb;902 final TwilightService twilightF = twilight;903 final UiModeManagerService uiModeF = uiMode;904 final AppWidgetService appWidgetF = appWidget;905 final WallpaperManagerService wallpaperF = wallpaper;906 final InputMethodManagerService immF = imm;907 final RecognitionManagerService recognitionF = recognition;908 final LocationManagerService locationF = location;909 final CountryDetectorService countryDetectorF = countryDetector;910 final NetworkTimeUpdateService networkTimeUpdaterF = networkTimeUpdater;911 final CommonTimeManagementService commonTimeMgmtServiceF = commonTimeMgmtService;912 final TextServicesManagerService textServiceManagerServiceF = tsms;913 final StatusBarManagerService statusBarF = statusBar;914 final DreamManagerService dreamyF = dreamy;915 final AssetAtlasService atlasF = atlas;916 final InputManagerService inputManagerF = inputManager;917 final TelephonyRegistry telephonyRegistryF = telephonyRegistry;918 final PrintManagerService printManagerF = printManager;919920 // We now tell the activity manager it is okay to run third party921 // code. It will call back into us once it has gotten to the state922 // where third party code can really run (but before it has actually923 // started launching the initial applications), for us to complete our924 // initialization.925 ActivityManagerService.self().systemReady(new Runnable() {926 public void run() {927 Slog.i(TAG, "Making services ready");928929 try {930 ActivityManagerService.self().startObservingNativeCrashes();931 } catch (Throwable e) {932 reportWtf("observing native crashes", e);933 }934 if (!headless) {935 startSystemUi(contextF);936 }937 try {938 if (mountServiceF != null) mountServiceF.systemReady();939 } catch (Throwable e) {940 reportWtf("making Mount Service ready", e);941 }942 try {943 if (batteryF != null) batteryF.systemReady();944 } catch (Throwable e) {945 reportWtf("making Battery Service ready", e);946 }947 try {948 if (networkManagementF != null) networkManagementF.systemReady();949 } catch (Throwable e) {950 reportWtf("making Network Managment Service ready", e);951 }952 try {953 if (networkStatsF != null) networkStatsF.systemReady();954 } catch (Throwable e) {955 reportWtf("making Network Stats Service ready", e);956 }957 try {958 if (networkPolicyF != null) networkPolicyF.systemReady();959 } catch (Throwable e) {960 reportWtf("making Network Policy Service ready", e);961 }962 try {963 if (connectivityF != null) connectivityF.systemReady();964 } catch (Throwable e) {965 reportWtf("making Connectivity Service ready", e);966 }967 try {968 if (dockF != null) dockF.systemReady();969 } catch (Throwable e) {970 reportWtf("making Dock Service ready", e);971 }972 try {973 if (usbF != null) usbF.systemReady();974 } catch (Throwable e) {975 reportWtf("making USB Service ready", e);976 }977 try {978 if (twilightF != null) twilightF.systemReady();979 } catch (Throwable e) {980 reportWtf("makin Twilight Service ready", e);981 }982 try {983 if (uiModeF != null) uiModeF.systemReady();984 } catch (Throwable e) {985 reportWtf("making UI Mode Service ready", e);986 }987 try {988 if (recognitionF != null) recognitionF.systemReady();989 } catch (Throwable e) {990 reportWtf("making Recognition Service ready", e);991 }992 Watchdog.getInstance().start();993994 // It is now okay to let the various system services start their995 // third party code...996997 try {998 if (appWidgetF != null) appWidgetF.systemRunning(safeMode);999 } catch (Throwable e) {1000 reportWtf("Notifying AppWidgetService running", e);1001 }1002 try {1003 if (wallpaperF != null) wallpaperF.systemRunning();1004 } catch (Throwable e) {1005 reportWtf("Notifying WallpaperService running", e);1006 }1007 try {1008 if (immF != null) immF.systemRunning(statusBarF);1009 } catch (Throwable e) {1010 reportWtf("Notifying InputMethodService running", e);1011 }1012 try {1013 if (locationF != null) locationF.systemRunning();1014 } catch (Throwable e) {1015 reportWtf("Notifying Location Service running", e);1016 }1017 try {1018 if (countryDetectorF != null) countryDetectorF.systemRunning();1019 } catch (Throwable e) {1020 reportWtf("Notifying CountryDetectorService running", e);1021 }1022 try {1023 if (networkTimeUpdaterF != null) networkTimeUpdaterF.systemRunning();1024 } catch (Throwable e) {1025 reportWtf("Notifying NetworkTimeService running", e);1026 }1027 try {1028 if (commonTimeMgmtServiceF != null) commonTimeMgmtServiceF.systemRunning();1029 } catch (Throwable e) {1030 reportWtf("Notifying CommonTimeManagementService running", e);1031 }1032 try {1033 if (textServiceManagerServiceF != null)1034 textServiceManagerServiceF.systemRunning();1035 } catch (Throwable e) {1036 reportWtf("Notifying TextServicesManagerService running", e);1037 }1038 try {1039 if (dreamyF != null) dreamyF.systemRunning();1040 } catch (Throwable e) {1041 reportWtf("Notifying DreamManagerService running", e);1042 }1043 try {1044 if (atlasF != null) atlasF.systemRunning();1045 } catch (Throwable e) {1046 reportWtf("Notifying AssetAtlasService running", e);1047 }1048 try {1049 // TODO(BT) Pass parameter to input manager1050 if (inputManagerF != null) inputManagerF.systemRunning();1051 } catch (Throwable e) {1052 reportWtf("Notifying InputManagerService running", e);1053 }10541055 try {1056 if (telephonyRegistryF != null) telephonyRegistryF.systemRunning();1057 } catch (Throwable e) {1058 reportWtf("Notifying TelephonyRegistry running", e);1059 }10601061 try {1062 if (printManagerF != null) printManagerF.systemRuning();1063 } catch (Throwable e) {1064 reportWtf("Notifying PrintManagerService running", e);1065 }1066 }1067 });10681069 // For debug builds, log event loop stalls to dropbox for analysis.1070 if (StrictMode.conditionallyEnableDebugLogging()) {1071 Slog.i(TAG, "Enabled StrictMode for system server main thread.");1072 }10731074 Looper.loop();1075 Slog.d(TAG, "System ServerThread is exiting!");1076 }10771078 static final void startSystemUi(Context context) {1079 Intent intent = new Intent();1080 intent.setComponent(new ComponentName("com.android.systemui",1081 "com.android.systemui.SystemUIService"));1082 //Slog.d(TAG, "Starting service: " + intent);1083 context.startServiceAsUser(intent, UserHandle.OWNER);1084 }1085}10861087public class SystemServer {1088 private static final String TAG = "SystemServer";10891090 public static final int FACTORY_TEST_OFF = 0;1091 public static final int FACTORY_TEST_LOW_LEVEL = 1;1092 public static final int FACTORY_TEST_HIGH_LEVEL = 2;10931094 static Timer timer;1095 static final long SNAPSHOT_INTERVAL = 60 * 60 * 1000; // 1hr10961097 // The earliest supported time. We pick one day into 1970, to1098 // give any timezone code room without going into negative time.1099 private static final long EARLIEST_SUPPORTED_TIME = 86400 * 1000;11001101 /**1102 * Called to initialize native system services.1103 */1104 private static native void nativeInit();11051106 public static void main(String[] args) {11071108 /*1109 * In case the runtime switched since last boot (such as when1110 * the old runtime was removed in an OTA), set the system1111 * property so that it is in sync. We can't do this in1112 * libnativehelper's JniInvocation::Init code where we already1113 * had to fallback to a different runtime because it is1114 * running as root and we need to be the system user to set1115 * the property. http://b/114631821116 */1117 SystemProperties.set("persist.sys.dalvik.vm.lib",1118 VMRuntime.getRuntime().vmLibrary());11191120 if (System.currentTimeMillis() < EARLIEST_SUPPORTED_TIME) {1121 // If a device's clock is before 1970 (before 0), a lot of1122 // APIs crash dealing with negative numbers, notably1123 // java.io.File#setLastModified, so instead we fake it and1124 // hope that time from cell towers or NTP fixes it1125 // shortly.1126 Slog.w(TAG, "System clock is before 1970; setting to 1970.");1127 SystemClock.setCurrentTimeMillis(EARLIEST_SUPPORTED_TIME);1128 }11291130 if (SamplingProfilerIntegration.isEnabled()) {1131 SamplingProfilerIntegration.start();1132 timer = new Timer();1133 timer.schedule(new TimerTask() {1134 @Override1135 public void run() {1136 SamplingProfilerIntegration.writeSnapshot("system_server", null);1137 }1138 }, SNAPSHOT_INTERVAL, SNAPSHOT_INTERVAL);1139 }11401141 // Mmmmmm... more memory!1142 dalvik.system.VMRuntime.getRuntime().clearGrowthLimit();11431144 // The system server has to run all of the time, so it needs to be1145 // as efficient as possible with its memory usage.1146 VMRuntime.getRuntime().setTargetHeapUtilization(0.8f);11471148 Environment.setUserRequired(true);11491150 System.loadLibrary("android_servers");11511152 Slog.i(TAG, "Entered the Android system server!");11531154 // Initialize native services.1155 nativeInit();11561157 // This used to be its own separate thread, but now it is1158 // just the loop we run on the main thread.1159 ServerThread thr = new ServerThread();1160 thr.initAndLoop();1161 }1162}这里，我们给出了全部的代码，但是很明显我们的重点在SystemSever中的main入口 前面一大堆关于Time 和Dalvik处理我们不管，我们只用关心
1159 ServerThread thr = new ServerThread();1160 thr.initAndLoop(); public void initAndLoop() {....... BatteryService battery = null; VibratorService vibrator = null;........ boolean disableTelephony = SystemProperties.getBoolean("config.disable_telephony", false); boolean disableSystemUI = SystemProperties.getBoolean("config.disable_systemui", false);......... try {...... telephonyRegistry = new TelephonyRegistry(context); ServiceManager.addService("telephony.registry", telephonyRegistry);....... } battery = new BatteryService(context, lights); ServiceManager.addService("battery", battery);....... vibrator = new VibratorService(context); ServiceManager.addService("vibrator", vibrator);.... if (!disableSystemUI) { try{ statusBar = new StatusBarManagerService(context, wm); ServiceManager.addService(Context.STATUS_BAR_SERVICE, statusBar); } }.......... try{ vibrator.systemReady(); }catch(Throwable e){ reportWtf("making Vibrator Service ready", e); }}这里，我抽出最典型的VibratorService启动过程给打击看，这也就解释了为什么我们通过
WindowManager WM= (WindowManager)Context.getSystemService(Context.WINDOW_SERVICE); 同时，在这里我也想提醒大家，我们的SystemUI也是在这里初始化的
1078 static final void startSystemUi(Context context) {1079 Intent intent = new Intent();1080 intent.setComponent(new ComponentName("com.android.systemui",1081 "com.android.systemui.SystemUIService"));1082 //Slog.d(TAG, "Starting service: " + intent);1083 context.startServiceAsUser(intent, UserHandle.OWNER);1084 }更多相关文章
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