SystemServer.java revision bc21fdefdfbeba1754c6cd339c7dd8e8f1d6fd48 
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 com.android.server.am.ActivityManagerService;
20import com.android.internal.app.ShutdownThread;
21import com.android.internal.os.BinderInternal;
22import com.android.internal.os.SamplingProfilerIntegration;
23
24import dalvik.system.VMRuntime;
25import dalvik.system.Zygote;
26
27import android.app.ActivityManagerNative;
28import android.bluetooth.BluetoothAdapter;
29import android.content.ComponentName;
30import android.content.ContentResolver;
31import android.content.ContentService;
32import android.content.Context;
33import android.content.Intent;
34import android.content.pm.IPackageManager;
35import android.database.ContentObserver;
36import android.database.Cursor;
37import android.media.AudioService;
38import android.os.Looper;
39import android.os.RemoteException;
40import android.os.ServiceManager;
41import android.os.StrictMode;
42import android.os.SystemClock;
43import android.os.SystemProperties;
44import android.provider.Contacts.People;
45import android.provider.Settings;
46import android.server.BluetoothA2dpService;
47import android.server.BluetoothService;
48import android.server.search.SearchManagerService;
49import android.util.EventLog;
50import android.util.Log;
51import android.util.Slog;
52import android.accounts.AccountManagerService;
53
54import java.io.File;
55import java.util.Timer;
56import java.util.TimerTask;
57
58class ServerThread extends Thread {
59    private static final String TAG = "SystemServer";
60    private final static boolean INCLUDE_DEMO = false;
61
62    private static final int LOG_BOOT_PROGRESS_SYSTEM_RUN = 3010;
63
64    private ContentResolver mContentResolver;
65
66    private class AdbSettingsObserver extends ContentObserver {
67        public AdbSettingsObserver() {
68            super(null);
69        }
70        @Override
71        public void onChange(boolean selfChange) {
72            boolean enableAdb = (Settings.Secure.getInt(mContentResolver,
73                Settings.Secure.ADB_ENABLED, 0) > 0);
74            // setting this secure property will start or stop adbd
75           SystemProperties.set("persist.service.adb.enable", enableAdb ? "1" : "0");
76        }
77    }
78
79    @Override
80    public void run() {
81        EventLog.writeEvent(EventLogTags.BOOT_PROGRESS_SYSTEM_RUN,
82            SystemClock.uptimeMillis());
83
84        Looper.prepare();
85
86        android.os.Process.setThreadPriority(
87                android.os.Process.THREAD_PRIORITY_FOREGROUND);
88
89        BinderInternal.disableBackgroundScheduling(true);
90        android.os.Process.setCanSelfBackground(false);
91
92        // Check whether we failed to shut down last time we tried.
93        {
94            final String shutdownAction = SystemProperties.get(
95                    ShutdownThread.SHUTDOWN_ACTION_PROPERTY, "");
96            if (shutdownAction != null && shutdownAction.length() > 0) {
97                boolean reboot = (shutdownAction.charAt(0) == '1');
98
99                final String reason;
100                if (shutdownAction.length() > 1) {
101                    reason = shutdownAction.substring(1, shutdownAction.length());
102                } else {
103                    reason = null;
104                }
105
106                ShutdownThread.rebootOrShutdown(reboot, reason);
107            }
108        }
109
110        String factoryTestStr = SystemProperties.get("ro.factorytest");
111        int factoryTest = "".equals(factoryTestStr) ? SystemServer.FACTORY_TEST_OFF
112                : Integer.parseInt(factoryTestStr);
113
114        LightsService lights = null;
115        PowerManagerService power = null;
116        BatteryService battery = null;
117        ConnectivityService connectivity = null;
118        IPackageManager pm = null;
119        Context context = null;
120        WindowManagerService wm = null;
121        BluetoothService bluetooth = null;
122        BluetoothA2dpService bluetoothA2dp = null;
123        HeadsetObserver headset = null;
124        DockObserver dock = null;
125        UsbObserver usb = null;
126        UiModeManagerService uiMode = null;
127        RecognitionManagerService recognition = null;
128        ThrottleService throttle = null;
129
130        // Critical services...
131        try {
132            Slog.i(TAG, "Entropy Service");
133            ServiceManager.addService("entropy", new EntropyService());
134
135            Slog.i(TAG, "Power Manager");
136            power = new PowerManagerService();
137            ServiceManager.addService(Context.POWER_SERVICE, power);
138
139            Slog.i(TAG, "Activity Manager");
140            context = ActivityManagerService.main(factoryTest);
141
142            Slog.i(TAG, "Telephony Registry");
143            ServiceManager.addService("telephony.registry", new TelephonyRegistry(context));
144
145            AttributeCache.init(context);
146
147            Slog.i(TAG, "Package Manager");
148            pm = PackageManagerService.main(context,
149                    factoryTest != SystemServer.FACTORY_TEST_OFF);
150
151            ActivityManagerService.setSystemProcess();
152
153            mContentResolver = context.getContentResolver();
154
155            // The AccountManager must come before the ContentService
156            try {
157                Slog.i(TAG, "Account Manager");
158                ServiceManager.addService(Context.ACCOUNT_SERVICE,
159                        new AccountManagerService(context));
160            } catch (Throwable e) {
161                Slog.e(TAG, "Failure starting Account Manager", e);
162            }
163
164            Slog.i(TAG, "Content Manager");
165            ContentService.main(context,
166                    factoryTest == SystemServer.FACTORY_TEST_LOW_LEVEL);
167
168            Slog.i(TAG, "System Content Providers");
169            ActivityManagerService.installSystemProviders();
170
171            Slog.i(TAG, "Battery Service");
172            battery = new BatteryService(context);
173            ServiceManager.addService("battery", battery);
174
175            Slog.i(TAG, "Lights Service");
176            lights = new LightsService(context);
177
178            Slog.i(TAG, "Vibrator Service");
179            ServiceManager.addService("vibrator", new VibratorService(context));
180
181            // only initialize the power service after we have started the
182            // lights service, content providers and the battery service.
183            power.init(context, lights, ActivityManagerService.getDefault(), battery);
184
185            Slog.i(TAG, "Alarm Manager");
186            AlarmManagerService alarm = new AlarmManagerService(context);
187            ServiceManager.addService(Context.ALARM_SERVICE, alarm);
188
189            Slog.i(TAG, "Init Watchdog");
190            Watchdog.getInstance().init(context, battery, power, alarm,
191                    ActivityManagerService.self());
192
193            Slog.i(TAG, "Window Manager");
194            wm = WindowManagerService.main(context, power,
195                    factoryTest != SystemServer.FACTORY_TEST_LOW_LEVEL);
196            ServiceManager.addService(Context.WINDOW_SERVICE, wm);
197
198            ((ActivityManagerService)ServiceManager.getService("activity"))
199                    .setWindowManager(wm);
200
201            // Skip Bluetooth if we have an emulator kernel
202            // TODO: Use a more reliable check to see if this product should
203            // support Bluetooth - see bug 988521
204            if (SystemProperties.get("ro.kernel.qemu").equals("1")) {
205                Slog.i(TAG, "Registering null Bluetooth Service (emulator)");
206                ServiceManager.addService(BluetoothAdapter.BLUETOOTH_SERVICE, null);
207            } else if (factoryTest == SystemServer.FACTORY_TEST_LOW_LEVEL) {
208                Slog.i(TAG, "Registering null Bluetooth Service (factory test)");
209                ServiceManager.addService(BluetoothAdapter.BLUETOOTH_SERVICE, null);
210            } else {
211                Slog.i(TAG, "Bluetooth Service");
212                bluetooth = new BluetoothService(context);
213                ServiceManager.addService(BluetoothAdapter.BLUETOOTH_SERVICE, bluetooth);
214                bluetooth.initAfterRegistration();
215                bluetoothA2dp = new BluetoothA2dpService(context, bluetooth);
216                ServiceManager.addService(BluetoothA2dpService.BLUETOOTH_A2DP_SERVICE,
217                                          bluetoothA2dp);
218
219                int bluetoothOn = Settings.Secure.getInt(mContentResolver,
220                    Settings.Secure.BLUETOOTH_ON, 0);
221                if (bluetoothOn > 0) {
222                    bluetooth.enable();
223                }
224            }
225
226        } catch (RuntimeException e) {
227            Slog.e("System", "Failure starting core service", e);
228        }
229
230        DevicePolicyManagerService devicePolicy = null;
231        StatusBarManagerService statusBar = null;
232        InputMethodManagerService imm = null;
233        AppWidgetService appWidget = null;
234        NotificationManagerService notification = null;
235        WallpaperManagerService wallpaper = null;
236        LocationManagerService location = null;
237
238        if (factoryTest != SystemServer.FACTORY_TEST_LOW_LEVEL) {
239            try {
240                Slog.i(TAG, "Device Policy");
241                devicePolicy = new DevicePolicyManagerService(context);
242                ServiceManager.addService(Context.DEVICE_POLICY_SERVICE, devicePolicy);
243            } catch (Throwable e) {
244                Slog.e(TAG, "Failure starting DevicePolicyService", e);
245            }
246
247            try {
248                Slog.i(TAG, "Status Bar");
249                statusBar = new StatusBarManagerService(context);
250                ServiceManager.addService(Context.STATUS_BAR_SERVICE, statusBar);
251            } catch (Throwable e) {
252                Slog.e(TAG, "Failure starting StatusBarManagerService", e);
253            }
254
255            try {
256                Slog.i(TAG, "Clipboard Service");
257                ServiceManager.addService(Context.CLIPBOARD_SERVICE,
258                        new ClipboardService(context));
259            } catch (Throwable e) {
260                Slog.e(TAG, "Failure starting Clipboard Service", e);
261            }
262
263            try {
264                Slog.i(TAG, "Input Method Service");
265                imm = new InputMethodManagerService(context, statusBar);
266                ServiceManager.addService(Context.INPUT_METHOD_SERVICE, imm);
267            } catch (Throwable e) {
268                Slog.e(TAG, "Failure starting Input Manager Service", e);
269            }
270
271            try {
272                Slog.i(TAG, "NetStat Service");
273                ServiceManager.addService("netstat", new NetStatService(context));
274            } catch (Throwable e) {
275                Slog.e(TAG, "Failure starting NetStat Service", e);
276            }
277
278            try {
279                Slog.i(TAG, "NetworkManagement Service");
280                ServiceManager.addService(
281                        Context.NETWORKMANAGEMENT_SERVICE,
282                        NetworkManagementService.create(context));
283            } catch (Throwable e) {
284                Slog.e(TAG, "Failure starting NetworkManagement Service", e);
285            }
286
287            try {
288                Slog.i(TAG, "Connectivity Service");
289                connectivity = ConnectivityService.getInstance(context);
290                ServiceManager.addService(Context.CONNECTIVITY_SERVICE, connectivity);
291            } catch (Throwable e) {
292                Slog.e(TAG, "Failure starting Connectivity Service", e);
293            }
294
295            try {
296                Slog.i(TAG, "Throttle Service");
297                throttle = new ThrottleService(context);
298                ServiceManager.addService(
299                        Context.THROTTLE_SERVICE, throttle);
300            } catch (Throwable e) {
301                Slog.e(TAG, "Failure starting ThrottleService", e);
302            }
303
304            try {
305              Slog.i(TAG, "Accessibility Manager");
306              ServiceManager.addService(Context.ACCESSIBILITY_SERVICE,
307                      new AccessibilityManagerService(context));
308            } catch (Throwable e) {
309              Slog.e(TAG, "Failure starting Accessibility Manager", e);
310            }
311
312            try {
313                /*
314                 * NotificationManagerService is dependant on MountService,
315                 * (for media / usb notifications) so we must start MountService first.
316                 */
317                Slog.i(TAG, "Mount Service");
318                ServiceManager.addService("mount", new MountService(context));
319            } catch (Throwable e) {
320                Slog.e(TAG, "Failure starting Mount Service", e);
321            }
322
323            try {
324                Slog.i(TAG, "Notification Manager");
325                notification = new NotificationManagerService(context, statusBar, lights);
326                ServiceManager.addService(Context.NOTIFICATION_SERVICE, notification);
327            } catch (Throwable e) {
328                Slog.e(TAG, "Failure starting Notification Manager", e);
329            }
330
331            try {
332                Slog.i(TAG, "Device Storage Monitor");
333                ServiceManager.addService(DeviceStorageMonitorService.SERVICE,
334                        new DeviceStorageMonitorService(context));
335            } catch (Throwable e) {
336                Slog.e(TAG, "Failure starting DeviceStorageMonitor service", e);
337            }
338
339            try {
340                Slog.i(TAG, "Location Manager");
341                location = new LocationManagerService(context);
342                ServiceManager.addService(Context.LOCATION_SERVICE, location);
343            } catch (Throwable e) {
344                Slog.e(TAG, "Failure starting Location Manager", e);
345            }
346
347            try {
348                Slog.i(TAG, "Search Service");
349                ServiceManager.addService(Context.SEARCH_SERVICE,
350                        new SearchManagerService(context));
351            } catch (Throwable e) {
352                Slog.e(TAG, "Failure starting Search Service", e);
353            }
354
355            if (INCLUDE_DEMO) {
356                Slog.i(TAG, "Installing demo data...");
357                (new DemoThread(context)).start();
358            }
359
360            try {
361                Slog.i(TAG, "DropBox Service");
362                ServiceManager.addService(Context.DROPBOX_SERVICE,
363                        new DropBoxManagerService(context, new File("/data/system/dropbox")));
364            } catch (Throwable e) {
365                Slog.e(TAG, "Failure starting DropBoxManagerService", e);
366            }
367
368            try {
369                Slog.i(TAG, "Wallpaper Service");
370                wallpaper = new WallpaperManagerService(context);
371                ServiceManager.addService(Context.WALLPAPER_SERVICE, wallpaper);
372            } catch (Throwable e) {
373                Slog.e(TAG, "Failure starting Wallpaper Service", e);
374            }
375
376            try {
377                Slog.i(TAG, "Audio Service");
378                ServiceManager.addService(Context.AUDIO_SERVICE, new AudioService(context));
379            } catch (Throwable e) {
380                Slog.e(TAG, "Failure starting Audio Service", e);
381            }
382
383            try {
384                Slog.i(TAG, "Headset Observer");
385                // Listen for wired headset changes
386                headset = new HeadsetObserver(context);
387            } catch (Throwable e) {
388                Slog.e(TAG, "Failure starting HeadsetObserver", e);
389            }
390
391            try {
392                Slog.i(TAG, "Dock Observer");
393                // Listen for dock station changes
394                dock = new DockObserver(context, power);
395            } catch (Throwable e) {
396                Slog.e(TAG, "Failure starting DockObserver", e);
397            }
398
399            try {
400                Slog.i(TAG, "USB Observer");
401                // Listen for USB changes
402                usb = new UsbObserver(context);
403            } catch (Throwable e) {
404                Slog.e(TAG, "Failure starting UsbObserver", e);
405            }
406
407            try {
408                Slog.i(TAG, "UI Mode Manager Service");
409                // Listen for UI mode changes
410                uiMode = new UiModeManagerService(context);
411            } catch (Throwable e) {
412                Slog.e(TAG, "Failure starting UiModeManagerService", e);
413            }
414
415            try {
416                Slog.i(TAG, "Backup Service");
417                ServiceManager.addService(Context.BACKUP_SERVICE,
418                        new BackupManagerService(context));
419            } catch (Throwable e) {
420                Slog.e(TAG, "Failure starting Backup Service", e);
421            }
422
423            try {
424                Slog.i(TAG, "AppWidget Service");
425                appWidget = new AppWidgetService(context);
426                ServiceManager.addService(Context.APPWIDGET_SERVICE, appWidget);
427            } catch (Throwable e) {
428                Slog.e(TAG, "Failure starting AppWidget Service", e);
429            }
430
431            try {
432                Slog.i(TAG, "Recognition Service");
433                recognition = new RecognitionManagerService(context);
434            } catch (Throwable e) {
435                Slog.e(TAG, "Failure starting Recognition Service", e);
436            }
437
438            try {
439                Slog.i(TAG, "DiskStats Service");
440                ServiceManager.addService("diskstats", new DiskStatsService(context));
441            } catch (Throwable e) {
442                Slog.e(TAG, "Failure starting DiskStats Service", e);
443            }
444        }
445
446        // make sure the ADB_ENABLED setting value matches the secure property value
447        Settings.Secure.putInt(mContentResolver, Settings.Secure.ADB_ENABLED,
448                "1".equals(SystemProperties.get("persist.service.adb.enable")) ? 1 : 0);
449
450        // register observer to listen for settings changes
451        mContentResolver.registerContentObserver(Settings.Secure.getUriFor(Settings.Secure.ADB_ENABLED),
452                false, new AdbSettingsObserver());
453
454        // Before things start rolling, be sure we have decided whether
455        // we are in safe mode.
456        final boolean safeMode = wm.detectSafeMode();
457        if (safeMode) {
458            try {
459                ActivityManagerNative.getDefault().enterSafeMode();
460                // Post the safe mode state in the Zygote class
461                Zygote.systemInSafeMode = true;
462                // Disable the JIT for the system_server process
463                VMRuntime.getRuntime().disableJitCompilation();
464            } catch (RemoteException e) {
465            }
466        } else {
467            // Enable the JIT for the system_server process
468            VMRuntime.getRuntime().startJitCompilation();
469        }
470
471        // It is now time to start up the app processes...
472
473        if (devicePolicy != null) {
474            devicePolicy.systemReady();
475        }
476
477        if (notification != null) {
478            notification.systemReady();
479        }
480
481        if (statusBar != null) {
482            statusBar.systemReady();
483        }
484        wm.systemReady();
485        power.systemReady();
486        try {
487            pm.systemReady();
488        } catch (RemoteException e) {
489        }
490
491        // These are needed to propagate to the runnable below.
492        final StatusBarManagerService statusBarF = statusBar;
493        final BatteryService batteryF = battery;
494        final ConnectivityService connectivityF = connectivity;
495        final DockObserver dockF = dock;
496        final UsbObserver usbF = usb;
497        final ThrottleService throttleF = throttle;
498        final UiModeManagerService uiModeF = uiMode;
499        final AppWidgetService appWidgetF = appWidget;
500        final WallpaperManagerService wallpaperF = wallpaper;
501        final InputMethodManagerService immF = imm;
502        final RecognitionManagerService recognitionF = recognition;
503        final LocationManagerService locationF = location;
504
505        // We now tell the activity manager it is okay to run third party
506        // code.  It will call back into us once it has gotten to the state
507        // where third party code can really run (but before it has actually
508        // started launching the initial applications), for us to complete our
509        // initialization.
510        ((ActivityManagerService)ActivityManagerNative.getDefault())
511                .systemReady(new Runnable() {
512            public void run() {
513                Slog.i(TAG, "Making services ready");
514
515                if (statusBarF != null) statusBarF.systemReady2();
516                if (batteryF != null) batteryF.systemReady();
517                if (connectivityF != null) connectivityF.systemReady();
518                if (dockF != null) dockF.systemReady();
519                if (usbF != null) usbF.systemReady();
520                if (uiModeF != null) uiModeF.systemReady();
521                if (recognitionF != null) recognitionF.systemReady();
522                Watchdog.getInstance().start();
523
524                // It is now okay to let the various system services start their
525                // third party code...
526
527                if (appWidgetF != null) appWidgetF.systemReady(safeMode);
528                if (wallpaperF != null) wallpaperF.systemReady();
529                if (immF != null) immF.systemReady();
530                if (locationF != null) locationF.systemReady();
531                if (throttleF != null) throttleF.systemReady();
532            }
533        });
534
535        // For debug builds, log event loop stalls to dropbox for analysis.
536        if (StrictMode.conditionallyEnableDebugLogging()) {
537            Slog.i(TAG, "Enabled StrictMode for system server main thread.");
538        }
539
540        Looper.loop();
541        Slog.d(TAG, "System ServerThread is exiting!");
542    }
543}
544
545class DemoThread extends Thread
546{
547    DemoThread(Context context)
548    {
549        mContext = context;
550    }
551
552    @Override
553    public void run()
554    {
555        try {
556            Cursor c = mContext.getContentResolver().query(People.CONTENT_URI, null, null, null, null);
557            boolean hasData = c != null && c.moveToFirst();
558            if (c != null) {
559                c.deactivate();
560            }
561            if (!hasData) {
562                DemoDataSet dataset = new DemoDataSet();
563                dataset.add(mContext);
564            }
565        } catch (Throwable e) {
566            Slog.e("SystemServer", "Failure installing demo data", e);
567        }
568
569    }
570
571    Context mContext;
572}
573
574public class SystemServer
575{
576    private static final String TAG = "SystemServer";
577
578    public static final int FACTORY_TEST_OFF = 0;
579    public static final int FACTORY_TEST_LOW_LEVEL = 1;
580    public static final int FACTORY_TEST_HIGH_LEVEL = 2;
581
582    static Timer timer;
583    static final long SNAPSHOT_INTERVAL = 60 * 60 * 1000; // 1hr
584
585    // The earliest supported time.  We pick one day into 1970, to
586    // give any timezone code room without going into negative time.
587    private static final long EARLIEST_SUPPORTED_TIME = 86400 * 1000;
588
589    /**
590     * This method is called from Zygote to initialize the system. This will cause the native
591     * services (SurfaceFlinger, AudioFlinger, etc..) to be started. After that it will call back
592     * up into init2() to start the Android services.
593     */
594    native public static void init1(String[] args);
595
596    public static void main(String[] args) {
597        if (System.currentTimeMillis() < EARLIEST_SUPPORTED_TIME) {
598            // If a device's clock is before 1970 (before 0), a lot of
599            // APIs crash dealing with negative numbers, notably
600            // java.io.File#setLastModified, so instead we fake it and
601            // hope that time from cell towers or NTP fixes it
602            // shortly.
603            Slog.w(TAG, "System clock is before 1970; setting to 1970.");
604            SystemClock.setCurrentTimeMillis(EARLIEST_SUPPORTED_TIME);
605        }
606
607        if (SamplingProfilerIntegration.isEnabled()) {
608            SamplingProfilerIntegration.start();
609            timer = new Timer();
610            timer.schedule(new TimerTask() {
611                @Override
612                public void run() {
613                    SamplingProfilerIntegration.writeSnapshot("system_server");
614                }
615            }, SNAPSHOT_INTERVAL, SNAPSHOT_INTERVAL);
616        }
617
618        // The system server has to run all of the time, so it needs to be
619        // as efficient as possible with its memory usage.
620        VMRuntime.getRuntime().setTargetHeapUtilization(0.8f);
621
622        System.loadLibrary("android_servers");
623        init1(args);
624    }
625
626    public static final void init2() {
627        Slog.i(TAG, "Entered the Android system server!");
628        Thread thr = new ServerThread();
629        thr.setName("android.server.ServerThread");
630        thr.start();
631    }
632}
633