SystemServer.java revision 21c9c45e5caf62b935354b74392fb40c4bf18529
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server; 18 19import android.accounts.AccountManagerService; 20import android.app.ActivityManagerNative; 21import android.bluetooth.BluetoothAdapter; 22import android.content.ComponentName; 23import android.content.ContentResolver; 24import android.content.ContentService; 25import android.content.Context; 26import android.content.Intent; 27import android.content.pm.IPackageManager; 28import android.content.res.Configuration; 29import android.database.ContentObserver; 30import android.media.AudioService; 31import android.os.Looper; 32import android.os.RemoteException; 33import android.os.ServiceManager; 34import android.os.StrictMode; 35import android.os.SystemClock; 36import android.os.SystemProperties; 37import android.provider.Settings; 38import android.server.BluetoothA2dpService; 39import android.server.BluetoothService; 40import android.server.search.SearchManagerService; 41import android.util.DisplayMetrics; 42import android.util.EventLog; 43import android.util.Slog; 44import android.view.WindowManager; 45 46import com.android.internal.app.ShutdownThread; 47import com.android.internal.os.BinderInternal; 48import com.android.internal.os.SamplingProfilerIntegration; 49import com.android.server.accessibility.AccessibilityManagerService; 50import com.android.server.am.ActivityManagerService; 51import com.android.server.net.NetworkPolicyManagerService; 52import com.android.server.net.NetworkStatsService; 53import com.android.server.pm.PackageManagerService; 54import com.android.server.usb.UsbService; 55import com.android.server.wm.WindowManagerService; 56 57import dalvik.system.VMRuntime; 58import dalvik.system.Zygote; 59 60import java.io.File; 61import java.util.Timer; 62import java.util.TimerTask; 63 64class ServerThread extends Thread { 65 private static final String TAG = "SystemServer"; 66 67 ContentResolver mContentResolver; 68 69 private class AdbSettingsObserver extends ContentObserver { 70 public AdbSettingsObserver() { 71 super(null); 72 } 73 @Override 74 public void onChange(boolean selfChange) { 75 boolean enableAdb = (Settings.Secure.getInt(mContentResolver, 76 Settings.Secure.ADB_ENABLED, 0) > 0); 77 // setting this secure property will start or stop adbd 78 SystemProperties.set("persist.service.adb.enable", enableAdb ? "1" : "0"); 79 } 80 } 81 82 @Override 83 public void run() { 84 EventLog.writeEvent(EventLogTags.BOOT_PROGRESS_SYSTEM_RUN, 85 SystemClock.uptimeMillis()); 86 87 Looper.prepare(); 88 89 android.os.Process.setThreadPriority( 90 android.os.Process.THREAD_PRIORITY_FOREGROUND); 91 92 BinderInternal.disableBackgroundScheduling(true); 93 android.os.Process.setCanSelfBackground(false); 94 95 // Check whether we failed to shut down last time we tried. 96 { 97 final String shutdownAction = SystemProperties.get( 98 ShutdownThread.SHUTDOWN_ACTION_PROPERTY, ""); 99 if (shutdownAction != null && shutdownAction.length() > 0) { 100 boolean reboot = (shutdownAction.charAt(0) == '1'); 101 102 final String reason; 103 if (shutdownAction.length() > 1) { 104 reason = shutdownAction.substring(1, shutdownAction.length()); 105 } else { 106 reason = null; 107 } 108 109 ShutdownThread.rebootOrShutdown(reboot, reason); 110 } 111 } 112 113 String factoryTestStr = SystemProperties.get("ro.factorytest"); 114 int factoryTest = "".equals(factoryTestStr) ? SystemServer.FACTORY_TEST_OFF 115 : Integer.parseInt(factoryTestStr); 116 117 LightsService lights = null; 118 PowerManagerService power = null; 119 BatteryService battery = null; 120 AlarmManagerService alarm = null; 121 NetworkManagementService networkManagement = null; 122 NetworkStatsService networkStats = null; 123 NetworkPolicyManagerService networkPolicy = null; 124 ConnectivityService connectivity = null; 125 IPackageManager pm = null; 126 Context context = null; 127 WindowManagerService wm = null; 128 BluetoothService bluetooth = null; 129 BluetoothA2dpService bluetoothA2dp = null; 130 WiredAccessoryObserver wiredAccessory = null; 131 DockObserver dock = null; 132 UsbService usb = null; 133 UiModeManagerService uiMode = null; 134 RecognitionManagerService recognition = null; 135 ThrottleService throttle = null; 136 NetworkTimeUpdateService networkTimeUpdater = null; 137 138 // Critical services... 139 try { 140 Slog.i(TAG, "Entropy Service"); 141 ServiceManager.addService("entropy", new EntropyService()); 142 143 Slog.i(TAG, "Power Manager"); 144 power = new PowerManagerService(); 145 ServiceManager.addService(Context.POWER_SERVICE, power); 146 147 Slog.i(TAG, "Activity Manager"); 148 context = ActivityManagerService.main(factoryTest); 149 150 Slog.i(TAG, "Telephony Registry"); 151 ServiceManager.addService("telephony.registry", new TelephonyRegistry(context)); 152 153 AttributeCache.init(context); 154 155 Slog.i(TAG, "Package Manager"); 156 pm = PackageManagerService.main(context, 157 factoryTest != SystemServer.FACTORY_TEST_OFF); 158 159 ActivityManagerService.setSystemProcess(); 160 161 mContentResolver = context.getContentResolver(); 162 163 // The AccountManager must come before the ContentService 164 try { 165 Slog.i(TAG, "Account Manager"); 166 ServiceManager.addService(Context.ACCOUNT_SERVICE, 167 new AccountManagerService(context)); 168 } catch (Throwable e) { 169 Slog.e(TAG, "Failure starting Account Manager", e); 170 } 171 172 Slog.i(TAG, "Content Manager"); 173 ContentService.main(context, 174 factoryTest == SystemServer.FACTORY_TEST_LOW_LEVEL); 175 176 Slog.i(TAG, "System Content Providers"); 177 ActivityManagerService.installSystemProviders(); 178 179 Slog.i(TAG, "Lights Service"); 180 lights = new LightsService(context); 181 182 Slog.i(TAG, "Battery Service"); 183 battery = new BatteryService(context, lights); 184 ServiceManager.addService("battery", battery); 185 186 Slog.i(TAG, "Vibrator Service"); 187 ServiceManager.addService("vibrator", new VibratorService(context)); 188 189 // only initialize the power service after we have started the 190 // lights service, content providers and the battery service. 191 power.init(context, lights, ActivityManagerService.getDefault(), battery); 192 193 Slog.i(TAG, "Alarm Manager"); 194 alarm = new AlarmManagerService(context); 195 ServiceManager.addService(Context.ALARM_SERVICE, alarm); 196 197 Slog.i(TAG, "Init Watchdog"); 198 Watchdog.getInstance().init(context, battery, power, alarm, 199 ActivityManagerService.self()); 200 201 Slog.i(TAG, "Window Manager"); 202 wm = WindowManagerService.main(context, power, 203 factoryTest != SystemServer.FACTORY_TEST_LOW_LEVEL); 204 ServiceManager.addService(Context.WINDOW_SERVICE, wm); 205 206 ((ActivityManagerService)ServiceManager.getService("activity")) 207 .setWindowManager(wm); 208 209 // Skip Bluetooth if we have an emulator kernel 210 // TODO: Use a more reliable check to see if this product should 211 // support Bluetooth - see bug 988521 212 if (SystemProperties.get("ro.kernel.qemu").equals("1")) { 213 Slog.i(TAG, "No Bluetooh Service (emulator)"); 214 } else if (factoryTest == SystemServer.FACTORY_TEST_LOW_LEVEL) { 215 Slog.i(TAG, "No Bluetooth Service (factory test)"); 216 } else { 217 Slog.i(TAG, "Bluetooth Service"); 218 bluetooth = new BluetoothService(context); 219 ServiceManager.addService(BluetoothAdapter.BLUETOOTH_SERVICE, bluetooth); 220 bluetooth.initAfterRegistration(); 221 bluetoothA2dp = new BluetoothA2dpService(context, bluetooth); 222 ServiceManager.addService(BluetoothA2dpService.BLUETOOTH_A2DP_SERVICE, 223 bluetoothA2dp); 224 bluetooth.initAfterA2dpRegistration(); 225 226 int bluetoothOn = Settings.Secure.getInt(mContentResolver, 227 Settings.Secure.BLUETOOTH_ON, 0); 228 if (bluetoothOn > 0) { 229 bluetooth.enable(); 230 } 231 } 232 233 } catch (RuntimeException e) { 234 Slog.e("System", "Failure starting core service", e); 235 } 236 237 DevicePolicyManagerService devicePolicy = null; 238 StatusBarManagerService statusBar = null; 239 InputMethodManagerService imm = null; 240 AppWidgetService appWidget = null; 241 NotificationManagerService notification = null; 242 WallpaperManagerService wallpaper = null; 243 LocationManagerService location = null; 244 CountryDetectorService countryDetector = null; 245 246 if (factoryTest != SystemServer.FACTORY_TEST_LOW_LEVEL) { 247 try { 248 Slog.i(TAG, "Device Policy"); 249 devicePolicy = new DevicePolicyManagerService(context); 250 ServiceManager.addService(Context.DEVICE_POLICY_SERVICE, devicePolicy); 251 } catch (Throwable e) { 252 Slog.e(TAG, "Failure starting DevicePolicyService", e); 253 } 254 255 try { 256 Slog.i(TAG, "Status Bar"); 257 statusBar = new StatusBarManagerService(context, wm); 258 ServiceManager.addService(Context.STATUS_BAR_SERVICE, statusBar); 259 } catch (Throwable e) { 260 Slog.e(TAG, "Failure starting StatusBarManagerService", e); 261 } 262 263 try { 264 Slog.i(TAG, "Clipboard Service"); 265 ServiceManager.addService(Context.CLIPBOARD_SERVICE, 266 new ClipboardService(context)); 267 } catch (Throwable e) { 268 Slog.e(TAG, "Failure starting Clipboard Service", e); 269 } 270 271 try { 272 Slog.i(TAG, "Input Method Service"); 273 imm = new InputMethodManagerService(context, statusBar); 274 ServiceManager.addService(Context.INPUT_METHOD_SERVICE, imm); 275 } catch (Throwable e) { 276 Slog.e(TAG, "Failure starting Input Manager Service", e); 277 } 278 279 try { 280 Slog.i(TAG, "NetworkManagement Service"); 281 networkManagement = NetworkManagementService.create(context); 282 ServiceManager.addService(Context.NETWORKMANAGEMENT_SERVICE, networkManagement); 283 } catch (Throwable e) { 284 Slog.e(TAG, "Failure starting NetworkManagement Service", e); 285 } 286 287 try { 288 Slog.i(TAG, "NetworkStats Service"); 289 networkStats = new NetworkStatsService(context, networkManagement, alarm); 290 ServiceManager.addService(Context.NETWORK_STATS_SERVICE, networkStats); 291 } catch (Throwable e) { 292 Slog.e(TAG, "Failure starting NetworkStats Service", e); 293 } 294 295 try { 296 Slog.i(TAG, "NetworkPolicy Service"); 297 networkPolicy = new NetworkPolicyManagerService( 298 context, ActivityManagerService.self(), power, networkStats); 299 ServiceManager.addService(Context.NETWORK_POLICY_SERVICE, networkPolicy); 300 } catch (Throwable e) { 301 Slog.e(TAG, "Failure starting NetworkPolicy Service", e); 302 } 303 304 try { 305 Slog.i(TAG, "Connectivity Service"); 306 connectivity = new ConnectivityService(context, networkManagement, networkPolicy); 307 ServiceManager.addService(Context.CONNECTIVITY_SERVICE, connectivity); 308 networkStats.bindConnectivityManager(connectivity); 309 networkPolicy.bindConnectivityManager(connectivity); 310 } catch (Throwable e) { 311 Slog.e(TAG, "Failure starting Connectivity Service", e); 312 } 313 314 try { 315 Slog.i(TAG, "Throttle Service"); 316 throttle = new ThrottleService(context); 317 ServiceManager.addService( 318 Context.THROTTLE_SERVICE, throttle); 319 } catch (Throwable e) { 320 Slog.e(TAG, "Failure starting ThrottleService", e); 321 } 322 323 try { 324 Slog.i(TAG, "Accessibility Manager"); 325 ServiceManager.addService(Context.ACCESSIBILITY_SERVICE, 326 new AccessibilityManagerService(context)); 327 } catch (Throwable e) { 328 Slog.e(TAG, "Failure starting Accessibility Manager", e); 329 } 330 331 try { 332 /* 333 * NotificationManagerService is dependant on MountService, 334 * (for media / usb notifications) so we must start MountService first. 335 */ 336 Slog.i(TAG, "Mount Service"); 337 ServiceManager.addService("mount", new MountService(context)); 338 } catch (Throwable e) { 339 Slog.e(TAG, "Failure starting Mount Service", e); 340 } 341 342 try { 343 Slog.i(TAG, "Notification Manager"); 344 notification = new NotificationManagerService(context, statusBar, lights); 345 ServiceManager.addService(Context.NOTIFICATION_SERVICE, notification); 346 } catch (Throwable e) { 347 Slog.e(TAG, "Failure starting Notification Manager", e); 348 } 349 350 try { 351 Slog.i(TAG, "Device Storage Monitor"); 352 ServiceManager.addService(DeviceStorageMonitorService.SERVICE, 353 new DeviceStorageMonitorService(context)); 354 } catch (Throwable e) { 355 Slog.e(TAG, "Failure starting DeviceStorageMonitor service", e); 356 } 357 358 try { 359 Slog.i(TAG, "Location Manager"); 360 location = new LocationManagerService(context); 361 ServiceManager.addService(Context.LOCATION_SERVICE, location); 362 } catch (Throwable e) { 363 Slog.e(TAG, "Failure starting Location Manager", e); 364 } 365 366 try { 367 Slog.i(TAG, "Country Detector"); 368 countryDetector = new CountryDetectorService(context); 369 ServiceManager.addService(Context.COUNTRY_DETECTOR, countryDetector); 370 } catch (Throwable e) { 371 Slog.e(TAG, "Failure starting Country Detector", e); 372 } 373 374 try { 375 Slog.i(TAG, "Search Service"); 376 ServiceManager.addService(Context.SEARCH_SERVICE, 377 new SearchManagerService(context)); 378 } catch (Throwable e) { 379 Slog.e(TAG, "Failure starting Search Service", e); 380 } 381 382 try { 383 Slog.i(TAG, "DropBox Service"); 384 ServiceManager.addService(Context.DROPBOX_SERVICE, 385 new DropBoxManagerService(context, new File("/data/system/dropbox"))); 386 } catch (Throwable e) { 387 Slog.e(TAG, "Failure starting DropBoxManagerService", e); 388 } 389 390 try { 391 Slog.i(TAG, "Wallpaper Service"); 392 wallpaper = new WallpaperManagerService(context); 393 ServiceManager.addService(Context.WALLPAPER_SERVICE, wallpaper); 394 } catch (Throwable e) { 395 Slog.e(TAG, "Failure starting Wallpaper Service", e); 396 } 397 398 try { 399 Slog.i(TAG, "Audio Service"); 400 ServiceManager.addService(Context.AUDIO_SERVICE, new AudioService(context)); 401 } catch (Throwable e) { 402 Slog.e(TAG, "Failure starting Audio Service", e); 403 } 404 405 try { 406 Slog.i(TAG, "Dock Observer"); 407 // Listen for dock station changes 408 dock = new DockObserver(context, power); 409 } catch (Throwable e) { 410 Slog.e(TAG, "Failure starting DockObserver", e); 411 } 412 413 try { 414 Slog.i(TAG, "Wired Accessory Observer"); 415 // Listen for wired headset changes 416 wiredAccessory = new WiredAccessoryObserver(context); 417 } catch (Throwable e) { 418 Slog.e(TAG, "Failure starting WiredAccessoryObserver", e); 419 } 420 421 try { 422 Slog.i(TAG, "USB Observer"); 423 // Listen for USB changes 424 usb = new UsbService(context); 425 ServiceManager.addService(Context.USB_SERVICE, usb); 426 } catch (Throwable e) { 427 Slog.e(TAG, "Failure starting UsbService", e); 428 } 429 430 try { 431 Slog.i(TAG, "UI Mode Manager Service"); 432 // Listen for UI mode changes 433 uiMode = new UiModeManagerService(context); 434 } catch (Throwable e) { 435 Slog.e(TAG, "Failure starting UiModeManagerService", e); 436 } 437 438 try { 439 Slog.i(TAG, "Backup Service"); 440 ServiceManager.addService(Context.BACKUP_SERVICE, 441 new BackupManagerService(context)); 442 } catch (Throwable e) { 443 Slog.e(TAG, "Failure starting Backup Service", e); 444 } 445 446 try { 447 Slog.i(TAG, "AppWidget Service"); 448 appWidget = new AppWidgetService(context); 449 ServiceManager.addService(Context.APPWIDGET_SERVICE, appWidget); 450 } catch (Throwable e) { 451 Slog.e(TAG, "Failure starting AppWidget Service", e); 452 } 453 454 try { 455 Slog.i(TAG, "Recognition Service"); 456 recognition = new RecognitionManagerService(context); 457 } catch (Throwable e) { 458 Slog.e(TAG, "Failure starting Recognition Service", e); 459 } 460 461 try { 462 Slog.i(TAG, "DiskStats Service"); 463 ServiceManager.addService("diskstats", new DiskStatsService(context)); 464 } catch (Throwable e) { 465 Slog.e(TAG, "Failure starting DiskStats Service", e); 466 } 467 468 try { 469 // need to add this service even if SamplingProfilerIntegration.isEnabled() 470 // is false, because it is this service that detects system property change and 471 // turns on SamplingProfilerIntegration. Plus, when sampling profiler doesn't work, 472 // there is little overhead for running this service. 473 Slog.i(TAG, "SamplingProfiler Service"); 474 ServiceManager.addService("samplingprofiler", 475 new SamplingProfilerService(context)); 476 } catch (Throwable e) { 477 Slog.e(TAG, "Failure starting SamplingProfiler Service", e); 478 } 479 480 try { 481 Slog.i(TAG, "NetworkTimeUpdateService"); 482 networkTimeUpdater = new NetworkTimeUpdateService(context); 483 } catch (Throwable e) { 484 Slog.e(TAG, "Failure starting NetworkTimeUpdate service"); 485 } 486 } 487 488 // make sure the ADB_ENABLED setting value matches the secure property value 489 Settings.Secure.putInt(mContentResolver, Settings.Secure.ADB_ENABLED, 490 "1".equals(SystemProperties.get("persist.service.adb.enable")) ? 1 : 0); 491 492 // register observer to listen for settings changes 493 mContentResolver.registerContentObserver(Settings.Secure.getUriFor(Settings.Secure.ADB_ENABLED), 494 false, new AdbSettingsObserver()); 495 496 // Before things start rolling, be sure we have decided whether 497 // we are in safe mode. 498 final boolean safeMode = wm.detectSafeMode(); 499 if (safeMode) { 500 ActivityManagerService.self().enterSafeMode(); 501 // Post the safe mode state in the Zygote class 502 Zygote.systemInSafeMode = true; 503 // Disable the JIT for the system_server process 504 VMRuntime.getRuntime().disableJitCompilation(); 505 } else { 506 // Enable the JIT for the system_server process 507 VMRuntime.getRuntime().startJitCompilation(); 508 } 509 510 // It is now time to start up the app processes... 511 512 if (devicePolicy != null) { 513 devicePolicy.systemReady(); 514 } 515 516 if (notification != null) { 517 notification.systemReady(); 518 } 519 520 wm.systemReady(); 521 522 if (safeMode) { 523 ActivityManagerService.self().showSafeModeOverlay(); 524 } 525 526 // Update the configuration for this context by hand, because we're going 527 // to start using it before the config change done in wm.systemReady() will 528 // propagate to it. 529 Configuration config = wm.computeNewConfiguration(); 530 DisplayMetrics metrics = new DisplayMetrics(); 531 WindowManager w = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE); 532 w.getDefaultDisplay().getMetrics(metrics); 533 context.getResources().updateConfiguration(config, metrics); 534 535 power.systemReady(); 536 try { 537 pm.systemReady(); 538 } catch (RemoteException e) { 539 } 540 541 // These are needed to propagate to the runnable below. 542 final Context contextF = context; 543 final BatteryService batteryF = battery; 544 final NetworkStatsService networkStatsF = networkStats; 545 final NetworkPolicyManagerService networkPolicyF = networkPolicy; 546 final ConnectivityService connectivityF = connectivity; 547 final DockObserver dockF = dock; 548 final UsbService usbF = usb; 549 final ThrottleService throttleF = throttle; 550 final UiModeManagerService uiModeF = uiMode; 551 final AppWidgetService appWidgetF = appWidget; 552 final WallpaperManagerService wallpaperF = wallpaper; 553 final InputMethodManagerService immF = imm; 554 final RecognitionManagerService recognitionF = recognition; 555 final LocationManagerService locationF = location; 556 final CountryDetectorService countryDetectorF = countryDetector; 557 final NetworkTimeUpdateService networkTimeUpdaterF = networkTimeUpdater; 558 559 // We now tell the activity manager it is okay to run third party 560 // code. It will call back into us once it has gotten to the state 561 // where third party code can really run (but before it has actually 562 // started launching the initial applications), for us to complete our 563 // initialization. 564 ((ActivityManagerService)ActivityManagerNative.getDefault()) 565 .systemReady(new Runnable() { 566 public void run() { 567 Slog.i(TAG, "Making services ready"); 568 569 startSystemUi(contextF); 570 if (batteryF != null) batteryF.systemReady(); 571 if (networkStatsF != null) networkStatsF.systemReady(); 572 if (networkPolicyF != null) networkPolicyF.systemReady(); 573 if (connectivityF != null) connectivityF.systemReady(); 574 if (dockF != null) dockF.systemReady(); 575 if (usbF != null) usbF.systemReady(); 576 if (uiModeF != null) uiModeF.systemReady(); 577 if (recognitionF != null) recognitionF.systemReady(); 578 Watchdog.getInstance().start(); 579 580 // It is now okay to let the various system services start their 581 // third party code... 582 583 if (appWidgetF != null) appWidgetF.systemReady(safeMode); 584 if (wallpaperF != null) wallpaperF.systemReady(); 585 if (immF != null) immF.systemReady(); 586 if (locationF != null) locationF.systemReady(); 587 if (countryDetectorF != null) countryDetectorF.systemReady(); 588 if (throttleF != null) throttleF.systemReady(); 589 if (networkTimeUpdaterF != null) networkTimeUpdaterF.systemReady(); 590 } 591 }); 592 593 // For debug builds, log event loop stalls to dropbox for analysis. 594 if (StrictMode.conditionallyEnableDebugLogging()) { 595 Slog.i(TAG, "Enabled StrictMode for system server main thread."); 596 } 597 598 Looper.loop(); 599 Slog.d(TAG, "System ServerThread is exiting!"); 600 } 601 602 static final void startSystemUi(Context context) { 603 Intent intent = new Intent(); 604 intent.setComponent(new ComponentName("com.android.systemui", 605 "com.android.systemui.SystemUIService")); 606 Slog.d(TAG, "Starting service: " + intent); 607 context.startService(intent); 608 } 609} 610 611public class SystemServer { 612 private static final String TAG = "SystemServer"; 613 614 public static final int FACTORY_TEST_OFF = 0; 615 public static final int FACTORY_TEST_LOW_LEVEL = 1; 616 public static final int FACTORY_TEST_HIGH_LEVEL = 2; 617 618 static Timer timer; 619 static final long SNAPSHOT_INTERVAL = 60 * 60 * 1000; // 1hr 620 621 // The earliest supported time. We pick one day into 1970, to 622 // give any timezone code room without going into negative time. 623 private static final long EARLIEST_SUPPORTED_TIME = 86400 * 1000; 624 625 /** 626 * This method is called from Zygote to initialize the system. This will cause the native 627 * services (SurfaceFlinger, AudioFlinger, etc..) to be started. After that it will call back 628 * up into init2() to start the Android services. 629 */ 630 native public static void init1(String[] args); 631 632 public static void main(String[] args) { 633 if (System.currentTimeMillis() < EARLIEST_SUPPORTED_TIME) { 634 // If a device's clock is before 1970 (before 0), a lot of 635 // APIs crash dealing with negative numbers, notably 636 // java.io.File#setLastModified, so instead we fake it and 637 // hope that time from cell towers or NTP fixes it 638 // shortly. 639 Slog.w(TAG, "System clock is before 1970; setting to 1970."); 640 SystemClock.setCurrentTimeMillis(EARLIEST_SUPPORTED_TIME); 641 } 642 643 if (SamplingProfilerIntegration.isEnabled()) { 644 SamplingProfilerIntegration.start(); 645 timer = new Timer(); 646 timer.schedule(new TimerTask() { 647 @Override 648 public void run() { 649 SamplingProfilerIntegration.writeSnapshot("system_server", null); 650 } 651 }, SNAPSHOT_INTERVAL, SNAPSHOT_INTERVAL); 652 } 653 654 // Mmmmmm... more memory! 655 dalvik.system.VMRuntime.getRuntime().clearGrowthLimit(); 656 657 // The system server has to run all of the time, so it needs to be 658 // as efficient as possible with its memory usage. 659 VMRuntime.getRuntime().setTargetHeapUtilization(0.8f); 660 661 System.loadLibrary("android_servers"); 662 init1(args); 663 } 664 665 public static final void init2() { 666 Slog.i(TAG, "Entered the Android system server!"); 667 Thread thr = new ServerThread(); 668 thr.setName("android.server.ServerThread"); 669 thr.start(); 670 } 671} 672