path: root/services/java/com/android/server/SystemServer.java

/*
 * Copyright (C) 2006 The Android Open Source Project
 * This code has been modified.  Portions copyright (C) 2010, T-Mobile USA, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.server;

import com.android.server.am.ActivityManagerService;
import com.android.server.usb.UsbService;
import com.android.internal.app.ShutdownThread;
import com.android.internal.os.BinderInternal;
import com.android.internal.os.SamplingProfilerIntegration;

import dalvik.system.DexClassLoader;
import dalvik.system.VMRuntime;
import dalvik.system.Zygote;

import android.app.ActivityManagerNative;
import android.bluetooth.BluetoothAdapter;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.ContentService;
import android.content.ContextWrapper;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.IPackageManager;
import android.database.ContentObserver;
import android.database.Cursor;
import android.media.AudioService;
import android.os.IBinder;
import android.os.Looper;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.StrictMode;
import android.os.SystemClock;
import android.os.SystemProperties;
import android.provider.Contacts.People;
import android.provider.Settings;
import android.server.BluetoothA2dpService;
import android.server.BluetoothHidService;
import android.server.BluetoothNetworkService;
import android.server.BluetoothService;
import android.server.search.SearchManagerService;
import android.util.EventLog;
import android.util.Log;
import android.util.Slog;
import android.accounts.AccountManagerService;

import java.io.File;
import java.util.Timer;
import java.util.TimerTask;
import java.lang.reflect.Constructor;

/* TI-OMAP custom package */
import com.ti.omap.omap_mm_library.UiCloningService;

class ServerThread extends Thread {
    private static final String TAG = "SystemServer";
    private final static boolean INCLUDE_DEMO = false;

    private static final int LOG_BOOT_PROGRESS_SYSTEM_RUN = 3010;

    private ContentResolver mContentResolver;

    private class AdbSettingsObserver extends ContentObserver {
        public AdbSettingsObserver() {
            super(null);
        }
        @Override
        public void onChange(boolean selfChange) {
            boolean enableAdb = (Settings.Secure.getInt(mContentResolver,
                Settings.Secure.ADB_ENABLED, 0) > 0);
            // setting this secure property will start or stop adbd
           SystemProperties.set("persist.service.adb.enable", enableAdb ? "1" : "0");
        }
    }

    @Override
    public void run() {
        EventLog.writeEvent(EventLogTags.BOOT_PROGRESS_SYSTEM_RUN,
            SystemClock.uptimeMillis());

        Looper.prepare();

        android.os.Process.setThreadPriority(
                android.os.Process.THREAD_PRIORITY_FOREGROUND);

        BinderInternal.disableBackgroundScheduling(true);
        android.os.Process.setCanSelfBackground(false);

        // Check whether we failed to shut down last time we tried.
        {
            final String shutdownAction = SystemProperties.get(
                    ShutdownThread.SHUTDOWN_ACTION_PROPERTY, "");
            if (shutdownAction != null && shutdownAction.length() > 0) {
                boolean reboot = (shutdownAction.charAt(0) == '1');

                final String reason;
                if (shutdownAction.length() > 1) {
                    reason = shutdownAction.substring(1, shutdownAction.length());
                } else {
                    reason = null;
                }

                ShutdownThread.rebootOrShutdown(reboot, reason);
            }
        }

        String factoryTestStr = SystemProperties.get("ro.factorytest");
        int factoryTest = "".equals(factoryTestStr) ? SystemServer.FACTORY_TEST_OFF
                : Integer.parseInt(factoryTestStr);

        LightsService lights = null;
        PowerManagerService power = null;
        BatteryService battery = null;
        ConnectivityService connectivity = null;
        IPackageManager pm = null;
        Context context = null;
        WindowManagerService wm = null;
        BluetoothService bluetooth = null;
        BluetoothA2dpService bluetoothA2dp = null;
        BluetoothHidService bluetoothHid = null;
        BluetoothNetworkService bluetoothNetwork = null;
        HeadsetObserver headset = null;
        HDMIObserver hdmi = null;
        DockObserver dock = null;
        UsbService usb = null;
        UiModeManagerService uiMode = null;
        RecognitionManagerService recognition = null;
        ThrottleService throttle = null;
        UiCloningService uiCloning = null;
        RingerSwitchObserver ringer = null;

        // Critical services...
        try {
            Slog.i(TAG, "Entropy Service");
            ServiceManager.addService("entropy", new EntropyService());

            Slog.i(TAG, "Power Manager");
            power = new PowerManagerService();
            ServiceManager.addService(Context.POWER_SERVICE, power);

            Slog.i(TAG, "Activity Manager");
            context = ActivityManagerService.main(factoryTest);

            Slog.i(TAG, "Telephony Registry");
            ServiceManager.addService("telephony.registry", new TelephonyRegistry(context));

            AttributeCache.init(context);

            Slog.i(TAG, "Package Manager");
            pm = PackageManagerService.main(context,
                    factoryTest != SystemServer.FACTORY_TEST_OFF);

            ActivityManagerService.setSystemProcess();

            mContentResolver = context.getContentResolver();

            // The AccountManager must come before the ContentService
            try {
                Slog.i(TAG, "Account Manager");
                ServiceManager.addService(Context.ACCOUNT_SERVICE,
                        new AccountManagerService(context));
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting Account Manager", e);
            }

            Slog.i(TAG, "Content Manager");
            ContentService.main(context,
                    factoryTest == SystemServer.FACTORY_TEST_LOW_LEVEL);

            Slog.i(TAG, "System Content Providers");
            ActivityManagerService.installSystemProviders();

            Slog.i(TAG, "Battery Service");
            battery = new BatteryService(context);
            ServiceManager.addService("battery", battery);

            Slog.i(TAG, "Lights Service");
            lights = new LightsService(context);

            Slog.i(TAG, "Vibrator Service");
            ServiceManager.addService("vibrator", new VibratorService(context));

            // only initialize the power service after we have started the
            // lights service, content providers and the battery service.
            power.init(context, lights, ActivityManagerService.getDefault(), battery);

            Slog.i(TAG, "Alarm Manager");
            AlarmManagerService alarm = new AlarmManagerService(context);
            ServiceManager.addService(Context.ALARM_SERVICE, alarm);

            Slog.i(TAG, "Init Watchdog");
            Watchdog.getInstance().init(context, battery, power, alarm,
                    ActivityManagerService.self());

            Slog.i(TAG, "Window Manager");
            wm = WindowManagerService.main(context, power,
                    factoryTest != SystemServer.FACTORY_TEST_LOW_LEVEL);
            ServiceManager.addService(Context.WINDOW_SERVICE, wm);

            ((ActivityManagerService)ServiceManager.getService("activity"))
                    .setWindowManager(wm);

            // Skip Bluetooth if we have an emulator kernel
            // TODO: Use a more reliable check to see if this product should
            // support Bluetooth - see bug 988521
            if (SystemProperties.get("ro.kernel.qemu").equals("1")) {
                Slog.i(TAG, "Registering null Bluetooth Service (emulator)");
                ServiceManager.addService(BluetoothAdapter.BLUETOOTH_SERVICE, null);
            } else if (factoryTest == SystemServer.FACTORY_TEST_LOW_LEVEL) {
                Slog.i(TAG, "Registering null Bluetooth Service (factory test)");
                ServiceManager.addService(BluetoothAdapter.BLUETOOTH_SERVICE, null);
            } else {
                Slog.i(TAG, "Bluetooth Service");
                bluetooth = new BluetoothService(context);
                ServiceManager.addService(BluetoothAdapter.BLUETOOTH_SERVICE, bluetooth);
                bluetooth.initAfterRegistration();
                bluetoothA2dp = new BluetoothA2dpService(context, bluetooth);
                ServiceManager.addService(BluetoothA2dpService.BLUETOOTH_A2DP_SERVICE,
                                          bluetoothA2dp);
                bluetoothHid = new BluetoothHidService(context, bluetooth);
                ServiceManager.addService(BluetoothHidService.BLUETOOTH_HID_SERVICE,
                                          bluetoothHid);
                bluetoothNetwork = new BluetoothNetworkService(context, bluetooth);
                ServiceManager.addService(BluetoothNetworkService.BLUETOOTH_NETWORK_SERVICE,
                                          bluetoothNetwork);
                Log.v(TAG, "Bluetooth Network Service");

                int bluetoothOn = Settings.Secure.getInt(mContentResolver,
                    Settings.Secure.BLUETOOTH_ON, 0);
                if (bluetoothOn > 0) {
                    bluetooth.enable();
                }
            }

        } catch (RuntimeException e) {
            Slog.e("System", "Failure starting core service", e);
        }

        DevicePolicyManagerService devicePolicy = null;
        StatusBarManagerService statusBar = null;
        InputMethodManagerService imm = null;
        AppWidgetService appWidget = null;
        ProfileManagerService profile = null;
        NotificationManagerService notification = null;
        WallpaperManagerService wallpaper = null;
        LocationManagerService location = null;

        if (factoryTest != SystemServer.FACTORY_TEST_LOW_LEVEL) {
            try {
                Slog.i(TAG, "Device Policy");
                devicePolicy = new DevicePolicyManagerService(context);
                ServiceManager.addService(Context.DEVICE_POLICY_SERVICE, devicePolicy);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting DevicePolicyService", e);
            }

            try {
                Slog.i(TAG, "Status Bar");
                statusBar = new StatusBarManagerService(context);
                ServiceManager.addService(Context.STATUS_BAR_SERVICE, statusBar);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting StatusBarManagerService", e);
            }

            try {
                Slog.i(TAG, "Clipboard Service");
                ServiceManager.addService(Context.CLIPBOARD_SERVICE,
                        new ClipboardService(context));
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting Clipboard Service", e);
            }

            try {
                Slog.i(TAG, "Input Method Service");
                imm = new InputMethodManagerService(context, statusBar);
                ServiceManager.addService(Context.INPUT_METHOD_SERVICE, imm);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting Input Manager Service", e);
            }

            try {
                Slog.i(TAG, "NetStat Service");
                ServiceManager.addService("netstat", new NetStatService(context));
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting NetStat Service", e);
            }

            try {
                Slog.i(TAG, "NetworkManagement Service");
                ServiceManager.addService(
                        Context.NETWORKMANAGEMENT_SERVICE,
                        NetworkManagementService.create(context));
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting NetworkManagement Service", e);
            }

            try {
                Slog.i(TAG, "Connectivity Service");
                connectivity = ConnectivityService.getInstance(context);
                ServiceManager.addService(Context.CONNECTIVITY_SERVICE, connectivity);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting Connectivity Service", e);
            }

            try {
                Slog.i(TAG, "Throttle Service");
                throttle = new ThrottleService(context);
                ServiceManager.addService(
                        Context.THROTTLE_SERVICE, throttle);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting ThrottleService", e);
            }

            try {
              Slog.i(TAG, "Accessibility Manager");
              ServiceManager.addService(Context.ACCESSIBILITY_SERVICE,
                      new AccessibilityManagerService(context));
            } catch (Throwable e) {
              Slog.e(TAG, "Failure starting Accessibility Manager", e);
            }

            try {
                /*
                 * NotificationManagerService is dependant on MountService,
                 * (for media / usb notifications) so we must start MountService first.
                 */
                Slog.i(TAG, "Mount Service");
                ServiceManager.addService("mount", new MountService(context));
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting Mount Service", e);
            }

            try {
                Slog.i(TAG, "Profile Manager");
                profile = new ProfileManagerService(context);
                ServiceManager.addService(Context.PROFILE_SERVICE, profile);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting Profile Manager", e);
            }

            try {
                Slog.i(TAG, "Notification Manager");
                notification = new NotificationManagerService(context, statusBar, lights);
                ServiceManager.addService(Context.NOTIFICATION_SERVICE, notification);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting Notification Manager", e);
            }

            try {
                Slog.i(TAG, "Device Storage Monitor");
                ServiceManager.addService(DeviceStorageMonitorService.SERVICE,
                        new DeviceStorageMonitorService(context));
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting DeviceStorageMonitor service", e);
            }

            try {
                Slog.i(TAG, "Location Manager");
                location = new LocationManagerService(context);
                ServiceManager.addService(Context.LOCATION_SERVICE, location);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting Location Manager", e);
            }

            try {
                Slog.i(TAG, "Search Service");
                ServiceManager.addService(Context.SEARCH_SERVICE,
                        new SearchManagerService(context));
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting Search Service", e);
            }

            if (INCLUDE_DEMO) {
                Slog.i(TAG, "Installing demo data...");
                (new DemoThread(context)).start();
            }

            try {
                Slog.i(TAG, "DropBox Service");
                ServiceManager.addService(Context.DROPBOX_SERVICE,
                        new DropBoxManagerService(context, new File("/data/system/dropbox")));
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting DropBoxManagerService", e);
            }

            try {
                Slog.i(TAG, "Wallpaper Service");
                wallpaper = new WallpaperManagerService(context);
                ServiceManager.addService(Context.WALLPAPER_SERVICE, wallpaper);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting Wallpaper Service", e);
            }

            try {
                Slog.i(TAG, "Audio Service");
                ServiceManager.addService(Context.AUDIO_SERVICE, new AudioService(context));
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting Audio Service", e);
            }

            try {
                Slog.i(TAG, "Headset Observer");
                // Listen for wired headset changes
                headset = new HeadsetObserver(context);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting HeadsetObserver", e);
            }

            try {
                if (SystemProperties.get("ro.config.ringerswitch").equals("1")) {
                    Slog.i(TAG, "RingerSwitch Observer");
                    // Listen for hard ringer switch changes
                    ringer = new RingerSwitchObserver(context);
                }
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting RingerSwitchObserver", e);
            }

            try {
                Slog.i(TAG, "HDMI Observer");
                // Listen for hdmi changes
                hdmi = new HDMIObserver(context);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting HDMIObserver", e);
            }

            try {
                Slog.i(TAG, "Dock Observer");
                // Listen for dock station changes
                dock = new DockObserver(context, power);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting DockObserver", e);
            }

            try {
                Slog.i(TAG, "USB Service");
                // Listen for USB changes
                usb = new UsbService(context);
                ServiceManager.addService(Context.USB_SERVICE, usb);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting UsbService", e);
            }

            try {
                Slog.i(TAG, "UI Mode Manager Service");
                // Listen for UI mode changes
                uiMode = new UiModeManagerService(context);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting UiModeManagerService", e);
            }

            try {
                Slog.i(TAG, "Backup Service");
                ServiceManager.addService(Context.BACKUP_SERVICE,
                        new BackupManagerService(context));
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting Backup Service", e);
            }

            try {
                Slog.i(TAG, "AppWidget Service");
                appWidget = new AppWidgetService(context);
                ServiceManager.addService(Context.APPWIDGET_SERVICE, appWidget);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting AppWidget Service", e);
            }

            try {
                Slog.i(TAG, "Recognition Service");
                recognition = new RecognitionManagerService(context);
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting Recognition Service", e);
            }
            
            try {
                Slog.i(TAG, "DiskStats Service");
                ServiceManager.addService("diskstats", new DiskStatsService(context));
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting DiskStats Service", e);
            }

            try {
                Slog.i(TAG, "AssetRedirectionManager Service");
                ServiceManager.addService("assetredirection", new AssetRedirectionManagerService(context));
            } catch (Throwable e) {
                Slog.e(TAG, "Failure starting AssetRedirectionManager Service", e);
            }

            String[] vendorServices = context.getResources().getStringArray(
                    com.android.internal.R.array.config_vendorServices);

            if (vendorServices != null && vendorServices.length > 0) {
                String cachePath = new ContextWrapper(context).getCacheDir().getAbsolutePath();
                ClassLoader parentLoader = ClassLoader.getSystemClassLoader();

                for (String service : vendorServices) {
                    String[] parts = service.split(":");
                    if (parts.length != 2) {
                        Slog.e(TAG, "Found invalid vendor service " + service);
                        continue;
                    }

                    String jarPath = parts[0];
                    String className = parts[1];

                    try {
                        /* Intentionally skipping all null checks in this block, as we also want an
                           error message if class loading or ctor resolution failed. The catch block
                           conveniently provides that for us also for NullPointerException */
                        DexClassLoader loader = new DexClassLoader(jarPath, cachePath, null, parentLoader);
                        Class<?> klass = loader.loadClass(className);
                        Constructor<?> ctor = klass.getDeclaredConstructors()[0];
                        Object instance = ctor.newInstance(context);

                        ServiceManager.addService(klass.getSimpleName(), (IBinder) instance);
                        Slog.i(TAG, "Vendor service " + className + " started.");
                    } catch (Exception e) {
                        Slog.e(TAG, "Starting vendor service " + className + " failed.", e);
                    }
                }
            }

            if (SystemProperties.OMAP_ENHANCEMENT ) {
                if(SystemProperties.getBoolean("tv.hdmi.uicloning.enable", false)) {
                    try {
                        Slog.i(TAG, "UiCloningService");
                        uiCloning = new UiCloningService(context);
                    } catch (Throwable e) {
                        Slog.e(TAG, "Failure starting UiCloningService", e);
                    }
                }
            }
        }

        // make sure the ADB_ENABLED setting value matches the secure property value
        Settings.Secure.putInt(mContentResolver, Settings.Secure.ADB_ENABLED,
                "1".equals(SystemProperties.get("persist.service.adb.enable")) ? 1 : 0);

        // register observer to listen for settings changes
        mContentResolver.registerContentObserver(Settings.Secure.getUriFor(Settings.Secure.ADB_ENABLED),
                false, new AdbSettingsObserver());

        // Before things start rolling, be sure we have decided whether
        // we are in safe mode.
        final boolean safeMode = wm.detectSafeMode();
        if (safeMode) {
            try {
                ActivityManagerNative.getDefault().enterSafeMode();
                // Post the safe mode state in the Zygote class
                Zygote.systemInSafeMode = true;
                // Disable the JIT for the system_server process
                VMRuntime.getRuntime().disableJitCompilation();
            } catch (RemoteException e) {
            }
        } else {
            // Enable the JIT for the system_server process
            VMRuntime.getRuntime().startJitCompilation();
        }

        // It is now time to start up the app processes...

        if (devicePolicy != null) {
            devicePolicy.systemReady();
        }

        if (notification != null) {
            notification.systemReady();
        }

        if (statusBar != null) {
            statusBar.systemReady();
        }
        wm.systemReady();
        power.systemReady();
        try {
            pm.systemReady();
        } catch (RemoteException e) {
        }

        IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_APP_LAUNCH_FAILURE);
        filter.addAction(Intent.ACTION_APP_LAUNCH_FAILURE_RESET);
        filter.addAction(Intent.ACTION_PACKAGE_ADDED);
        filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
        filter.addCategory(Intent.CATEGORY_THEME_PACKAGE_INSTALLED_STATE_CHANGE);
        filter.addDataScheme("package");
        context.registerReceiver(new AppsLaunchFailureReceiver(), filter);

        // These are needed to propagate to the runnable below.
        final StatusBarManagerService statusBarF = statusBar;
        final BatteryService batteryF = battery;
        final ConnectivityService connectivityF = connectivity;
        final DockObserver dockF = dock;
        final UsbService usbF = usb;
        final ThrottleService throttleF = throttle;
        final UiModeManagerService uiModeF = uiMode;
        final AppWidgetService appWidgetF = appWidget;
        final WallpaperManagerService wallpaperF = wallpaper;
        final InputMethodManagerService immF = imm;
        final RecognitionManagerService recognitionF = recognition;
        final LocationManagerService locationF = location;

        // We now tell the activity manager it is okay to run third party
        // code.  It will call back into us once it has gotten to the state
        // where third party code can really run (but before it has actually
        // started launching the initial applications), for us to complete our
        // initialization.
        ((ActivityManagerService)ActivityManagerNative.getDefault())
                .systemReady(new Runnable() {
            public void run() {
                Slog.i(TAG, "Making services ready");

                if (statusBarF != null) statusBarF.systemReady2();
                if (batteryF != null) batteryF.systemReady();
                if (connectivityF != null) connectivityF.systemReady();
                if (dockF != null) dockF.systemReady();
                if (usbF != null) usbF.systemReady();
                if (uiModeF != null) uiModeF.systemReady();
                if (recognitionF != null) recognitionF.systemReady();
                Watchdog.getInstance().start();

                // It is now okay to let the various system services start their
                // third party code...

                if (appWidgetF != null) appWidgetF.systemReady(safeMode);
                if (wallpaperF != null) wallpaperF.systemReady();
                if (immF != null) immF.systemReady();
                if (locationF != null) locationF.systemReady();
                if (throttleF != null) throttleF.systemReady();
            }
        });

        // For debug builds, log event loop stalls to dropbox for analysis.
        if (StrictMode.conditionallyEnableDebugLogging()) {
            Slog.i(TAG, "Enabled StrictMode for system server main thread.");
        }

        Looper.loop();
        Slog.d(TAG, "System ServerThread is exiting!");
    }
}

class DemoThread extends Thread
{
    DemoThread(Context context)
    {
        mContext = context;
    }

    @Override
    public void run()
    {
        try {
            Cursor c = mContext.getContentResolver().query(People.CONTENT_URI, null, null, null, null);
            boolean hasData = c != null && c.moveToFirst();
            if (c != null) {
                c.deactivate();
            }
            if (!hasData) {
                DemoDataSet dataset = new DemoDataSet();
                dataset.add(mContext);
            }
        } catch (Throwable e) {
            Slog.e("SystemServer", "Failure installing demo data", e);
        }

    }

    Context mContext;
}

public class SystemServer
{
    private static final String TAG = "SystemServer";

    public static final int FACTORY_TEST_OFF = 0;
    public static final int FACTORY_TEST_LOW_LEVEL = 1;
    public static final int FACTORY_TEST_HIGH_LEVEL = 2;

    static Timer timer;
    static final long SNAPSHOT_INTERVAL = 60 * 60 * 1000; // 1hr

    // The earliest supported time.  We pick one day into 1970, to
    // give any timezone code room without going into negative time.
    private static final long EARLIEST_SUPPORTED_TIME = 86400 * 1000;

    /**
     * This method is called from Zygote to initialize the system. This will cause the native
     * services (SurfaceFlinger, AudioFlinger, etc..) to be started. After that it will call back
     * up into init2() to start the Android services.
     */
    native public static void init1(String[] args);

    public static void main(String[] args) {
        if (System.currentTimeMillis() < EARLIEST_SUPPORTED_TIME) {
            // If a device's clock is before 1970 (before 0), a lot of
            // APIs crash dealing with negative numbers, notably
            // java.io.File#setLastModified, so instead we fake it and
            // hope that time from cell towers or NTP fixes it
            // shortly.
            Slog.w(TAG, "System clock is before 1970; setting to 1970.");
            SystemClock.setCurrentTimeMillis(EARLIEST_SUPPORTED_TIME);
        }

        if (SamplingProfilerIntegration.isEnabled()) {
            SamplingProfilerIntegration.start();
            timer = new Timer();
            timer.schedule(new TimerTask() {
                @Override
                public void run() {
                    SamplingProfilerIntegration.writeSnapshot("system_server");
                }
            }, SNAPSHOT_INTERVAL, SNAPSHOT_INTERVAL);
        }

        // The system server has to run all of the time, so it needs to be
        // as efficient as possible with its memory usage.
        VMRuntime.getRuntime().setTargetHeapUtilization(0.8f);
        
        System.loadLibrary("android_servers");
        init1(args);
    }

    public static final void init2() {
        Slog.i(TAG, "Entered the Android system server!");
        Thread thr = new ServerThread();
        thr.setName("android.server.ServerThread");
        thr.start();
    }
}