| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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.stats; |
| |
| import static android.os.Process.THREAD_PRIORITY_BACKGROUND; |
| |
| import android.app.AlarmManager; |
| import android.app.AlarmManager.OnAlarmListener; |
| import android.app.StatsManager; |
| import android.content.BroadcastReceiver; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.pm.PackageInfo; |
| import android.content.pm.PackageManager; |
| import android.content.pm.ResolveInfo; |
| import android.os.Binder; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.HandlerThread; |
| import android.os.IBinder; |
| import android.os.IStatsCompanionService; |
| import android.os.IStatsd; |
| import android.os.Looper; |
| import android.os.ParcelFileDescriptor; |
| import android.os.RemoteException; |
| import android.os.StatsFrameworkInitializer; |
| import android.os.SystemClock; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| import android.util.Log; |
| import android.util.proto.ProtoOutputStream; |
| |
| import com.android.internal.annotations.GuardedBy; |
| |
| import libcore.io.IoUtils; |
| |
| import java.io.File; |
| import java.io.FileDescriptor; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Helper service for statsd (the native stats management service in cmds/statsd/). |
| * Used for registering and receiving alarms on behalf of statsd. |
| * |
| * @hide |
| */ |
| public class StatsCompanionService extends IStatsCompanionService.Stub { |
| |
| private static final long MILLIS_IN_A_DAY = TimeUnit.DAYS.toMillis(1); |
| |
| public static final String RESULT_RECEIVER_CONTROLLER_KEY = "controller_activity"; |
| public static final String CONFIG_DIR = "/data/misc/stats-service"; |
| |
| static final String TAG = "StatsCompanionService"; |
| static final boolean DEBUG = false; |
| /** |
| * Hard coded field ids of frameworks/base/cmds/statsd/src/uid_data.proto |
| * to be used in ProtoOutputStream. |
| */ |
| private static final int APPLICATION_INFO_FIELD_ID = 1; |
| private static final int UID_FIELD_ID = 1; |
| private static final int VERSION_FIELD_ID = 2; |
| private static final int VERSION_STRING_FIELD_ID = 3; |
| private static final int PACKAGE_NAME_FIELD_ID = 4; |
| private static final int INSTALLER_FIELD_ID = 5; |
| |
| public static final int DEATH_THRESHOLD = 10; |
| |
| static final class CompanionHandler extends Handler { |
| CompanionHandler(Looper looper) { |
| super(looper); |
| } |
| } |
| |
| private final Context mContext; |
| private final AlarmManager mAlarmManager; |
| @GuardedBy("sStatsdLock") |
| private static IStatsd sStatsd; |
| private static final Object sStatsdLock = new Object(); |
| |
| private final OnAlarmListener mAnomalyAlarmListener = new AnomalyAlarmListener(); |
| private final OnAlarmListener mPullingAlarmListener = new PullingAlarmListener(); |
| private final OnAlarmListener mPeriodicAlarmListener = new PeriodicAlarmListener(); |
| |
| private StatsManagerService mStatsManagerService; |
| |
| @GuardedBy("sStatsdLock") |
| private final HashSet<Long> mDeathTimeMillis = new HashSet<>(); |
| @GuardedBy("sStatsdLock") |
| private final HashMap<Long, String> mDeletedFiles = new HashMap<>(); |
| private final CompanionHandler mHandler; |
| |
| public StatsCompanionService(Context context) { |
| super(); |
| mContext = context; |
| mAlarmManager = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE); |
| if (DEBUG) Log.d(TAG, "Registered receiver for ACTION_PACKAGE_REPLACED and ADDED."); |
| HandlerThread handlerThread = new HandlerThread(TAG); |
| handlerThread.start(); |
| mHandler = new CompanionHandler(handlerThread.getLooper()); |
| |
| } |
| |
| private final static int[] toIntArray(List<Integer> list) { |
| int[] ret = new int[list.size()]; |
| for (int i = 0; i < ret.length; i++) { |
| ret[i] = list.get(i); |
| } |
| return ret; |
| } |
| |
| private final static long[] toLongArray(List<Long> list) { |
| long[] ret = new long[list.size()]; |
| for (int i = 0; i < ret.length; i++) { |
| ret[i] = list.get(i); |
| } |
| return ret; |
| } |
| |
| /** |
| * Non-blocking call to retrieve a reference to statsd |
| * |
| * @return IStatsd object if statsd is ready, null otherwise. |
| */ |
| private static IStatsd getStatsdNonblocking() { |
| synchronized (sStatsdLock) { |
| return sStatsd; |
| } |
| } |
| |
| private static void informAllUidsLocked(Context context) throws RemoteException { |
| UserManager um = (UserManager) context.getSystemService(Context.USER_SERVICE); |
| PackageManager pm = context.getPackageManager(); |
| final List<UserHandle> users = um.getUserHandles(true); |
| if (DEBUG) { |
| Log.d(TAG, "Iterating over " + users.size() + " userHandles."); |
| } |
| |
| ParcelFileDescriptor[] fds; |
| try { |
| fds = ParcelFileDescriptor.createPipe(); |
| } catch (IOException e) { |
| Log.e(TAG, "Failed to create a pipe to send uid map data.", e); |
| return; |
| } |
| sStatsd.informAllUidData(fds[0]); |
| try { |
| fds[0].close(); |
| } catch (IOException e) { |
| Log.e(TAG, "Failed to close the read side of the pipe.", e); |
| } |
| final ParcelFileDescriptor writeFd = fds[1]; |
| HandlerThread backgroundThread = new HandlerThread( |
| "statsCompanionService.bg", THREAD_PRIORITY_BACKGROUND); |
| backgroundThread.start(); |
| Handler handler = new Handler(backgroundThread.getLooper()); |
| handler.post(() -> { |
| FileOutputStream fout = new ParcelFileDescriptor.AutoCloseOutputStream(writeFd); |
| try { |
| ProtoOutputStream output = new ProtoOutputStream(fout); |
| int numRecords = 0; |
| // Add in all the apps for every user/profile. |
| for (UserHandle userHandle : users) { |
| List<PackageInfo> pi = |
| pm.getInstalledPackagesAsUser(PackageManager.MATCH_UNINSTALLED_PACKAGES |
| | PackageManager.MATCH_ANY_USER, |
| userHandle.getIdentifier()); |
| for (int j = 0; j < pi.size(); j++) { |
| if (pi.get(j).applicationInfo != null) { |
| String installer; |
| try { |
| installer = pm.getInstallerPackageName(pi.get(j).packageName); |
| } catch (IllegalArgumentException e) { |
| installer = ""; |
| } |
| long applicationInfoToken = |
| output.start(ProtoOutputStream.FIELD_TYPE_MESSAGE |
| | ProtoOutputStream.FIELD_COUNT_REPEATED |
| | APPLICATION_INFO_FIELD_ID); |
| output.write(ProtoOutputStream.FIELD_TYPE_INT32 |
| | ProtoOutputStream.FIELD_COUNT_SINGLE | UID_FIELD_ID, |
| pi.get(j).applicationInfo.uid); |
| output.write(ProtoOutputStream.FIELD_TYPE_INT64 |
| | ProtoOutputStream.FIELD_COUNT_SINGLE |
| | VERSION_FIELD_ID, pi.get(j).getLongVersionCode()); |
| output.write(ProtoOutputStream.FIELD_TYPE_STRING |
| | ProtoOutputStream.FIELD_COUNT_SINGLE |
| | VERSION_STRING_FIELD_ID, |
| pi.get(j).versionName); |
| output.write(ProtoOutputStream.FIELD_TYPE_STRING |
| | ProtoOutputStream.FIELD_COUNT_SINGLE |
| | PACKAGE_NAME_FIELD_ID, pi.get(j).packageName); |
| output.write(ProtoOutputStream.FIELD_TYPE_STRING |
| | ProtoOutputStream.FIELD_COUNT_SINGLE |
| | INSTALLER_FIELD_ID, |
| installer == null ? "" : installer); |
| numRecords++; |
| output.end(applicationInfoToken); |
| } |
| } |
| } |
| output.flush(); |
| if (DEBUG) { |
| Log.d(TAG, "Sent data for " + numRecords + " apps"); |
| } |
| } finally { |
| IoUtils.closeQuietly(fout); |
| backgroundThread.quit(); |
| backgroundThread.interrupt(); |
| } |
| }); |
| } |
| |
| private final static class AppUpdateReceiver extends BroadcastReceiver { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| /** |
| * App updates actually consist of REMOVE, ADD, and then REPLACE broadcasts. To avoid |
| * waste, we ignore the REMOVE and ADD broadcasts that contain the replacing flag. |
| * If we can't find the value for EXTRA_REPLACING, we default to false. |
| */ |
| if (!intent.getAction().equals(Intent.ACTION_PACKAGE_REPLACED) |
| && intent.getBooleanExtra(Intent.EXTRA_REPLACING, false)) { |
| return; // Keep only replacing or normal add and remove. |
| } |
| if (DEBUG) Log.d(TAG, "StatsCompanionService noticed an app was updated."); |
| synchronized (sStatsdLock) { |
| if (sStatsd == null) { |
| Log.w(TAG, "Could not access statsd to inform it of an app update"); |
| return; |
| } |
| try { |
| if (intent.getAction().equals(Intent.ACTION_PACKAGE_REMOVED)) { |
| Bundle b = intent.getExtras(); |
| int uid = b.getInt(Intent.EXTRA_UID); |
| boolean replacing = intent.getBooleanExtra(Intent.EXTRA_REPLACING, false); |
| if (!replacing) { |
| // Don't bother sending an update if we're right about to get another |
| // intent for the new version that's added. |
| String app = intent.getData().getSchemeSpecificPart(); |
| sStatsd.informOnePackageRemoved(app, uid); |
| } |
| } else { |
| PackageManager pm = context.getPackageManager(); |
| Bundle b = intent.getExtras(); |
| int uid = b.getInt(Intent.EXTRA_UID); |
| String app = intent.getData().getSchemeSpecificPart(); |
| PackageInfo pi = pm.getPackageInfo(app, PackageManager.MATCH_ANY_USER); |
| String installer; |
| try { |
| installer = pm.getInstallerPackageName(app); |
| } catch (IllegalArgumentException e) { |
| installer = ""; |
| } |
| sStatsd.informOnePackage( |
| app, |
| uid, |
| pi.getLongVersionCode(), |
| pi.versionName == null ? "" : pi.versionName, |
| installer == null ? "" : installer); |
| } |
| } catch (Exception e) { |
| Log.w(TAG, "Failed to inform statsd of an app update", e); |
| } |
| } |
| } |
| } |
| |
| private static final class UserUpdateReceiver extends BroadcastReceiver { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| synchronized (sStatsdLock) { |
| if (sStatsd == null) { |
| Log.w(TAG, "Could not access statsd for UserUpdateReceiver"); |
| return; |
| } |
| try { |
| // Pull the latest state of UID->app name, version mapping. |
| // Needed since the new user basically has a version of every app. |
| informAllUidsLocked(context); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Failed to inform statsd latest update of all apps", e); |
| } |
| } |
| } |
| } |
| |
| public static final class AnomalyAlarmListener implements OnAlarmListener { |
| @Override |
| public void onAlarm() { |
| if (DEBUG) { |
| Log.i(TAG, "StatsCompanionService believes an anomaly has occurred at time " |
| + System.currentTimeMillis() + "ms."); |
| } |
| IStatsd statsd = getStatsdNonblocking(); |
| if (statsd == null) { |
| Log.w(TAG, "Could not access statsd to inform it of anomaly alarm firing"); |
| return; |
| } |
| try { |
| // Two-way call to statsd to retain AlarmManager wakelock |
| statsd.informAnomalyAlarmFired(); |
| } catch (RemoteException e) { |
| Log.w(TAG, "Failed to inform statsd of anomaly alarm firing", e); |
| } |
| // AlarmManager releases its own wakelock here. |
| } |
| } |
| |
| public final static class PullingAlarmListener implements OnAlarmListener { |
| @Override |
| public void onAlarm() { |
| if (DEBUG) { |
| Log.d(TAG, "Time to poll something."); |
| } |
| IStatsd statsd = getStatsdNonblocking(); |
| if (statsd == null) { |
| Log.w(TAG, "Could not access statsd to inform it of pulling alarm firing."); |
| return; |
| } |
| try { |
| // Two-way call to statsd to retain AlarmManager wakelock |
| statsd.informPollAlarmFired(); |
| } catch (RemoteException e) { |
| Log.w(TAG, "Failed to inform statsd of pulling alarm firing.", e); |
| } |
| } |
| } |
| |
| public final static class PeriodicAlarmListener implements OnAlarmListener { |
| @Override |
| public void onAlarm() { |
| if (DEBUG) { |
| Log.d(TAG, "Time to trigger periodic alarm."); |
| } |
| IStatsd statsd = getStatsdNonblocking(); |
| if (statsd == null) { |
| Log.w(TAG, "Could not access statsd to inform it of periodic alarm firing."); |
| return; |
| } |
| try { |
| // Two-way call to statsd to retain AlarmManager wakelock |
| statsd.informAlarmForSubscriberTriggeringFired(); |
| } catch (RemoteException e) { |
| Log.w(TAG, "Failed to inform statsd of periodic alarm firing.", e); |
| } |
| // AlarmManager releases its own wakelock here. |
| } |
| } |
| |
| public final static class ShutdownEventReceiver extends BroadcastReceiver { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| /** |
| * Skip immediately if intent is not relevant to device shutdown. |
| */ |
| if (!intent.getAction().equals(Intent.ACTION_REBOOT) |
| && !(intent.getAction().equals(Intent.ACTION_SHUTDOWN) |
| && (intent.getFlags() & Intent.FLAG_RECEIVER_FOREGROUND) != 0)) { |
| return; |
| } |
| |
| if (DEBUG) { |
| Log.i(TAG, "StatsCompanionService noticed a shutdown."); |
| } |
| IStatsd statsd = getStatsdNonblocking(); |
| if (statsd == null) { |
| Log.w(TAG, "Could not access statsd to inform it of a shutdown event."); |
| return; |
| } |
| try { |
| // two way binder call |
| statsd.informDeviceShutdown(); |
| } catch (Exception e) { |
| Log.w(TAG, "Failed to inform statsd of a shutdown event.", e); |
| } |
| } |
| } |
| |
| @Override // Binder call |
| public void setAnomalyAlarm(long timestampMs) { |
| StatsCompanion.enforceStatsdCallingUid(); |
| if (DEBUG) Log.d(TAG, "Setting anomaly alarm for " + timestampMs); |
| final long callingToken = Binder.clearCallingIdentity(); |
| try { |
| // using ELAPSED_REALTIME, not ELAPSED_REALTIME_WAKEUP, so if device is asleep, will |
| // only fire when it awakens. |
| // AlarmManager will automatically cancel any previous mAnomalyAlarmListener alarm. |
| mAlarmManager.setExact(AlarmManager.ELAPSED_REALTIME, timestampMs, TAG + ".anomaly", |
| mAnomalyAlarmListener, mHandler); |
| } finally { |
| Binder.restoreCallingIdentity(callingToken); |
| } |
| } |
| |
| @Override // Binder call |
| public void cancelAnomalyAlarm() { |
| StatsCompanion.enforceStatsdCallingUid(); |
| if (DEBUG) Log.d(TAG, "Cancelling anomaly alarm"); |
| final long callingToken = Binder.clearCallingIdentity(); |
| try { |
| mAlarmManager.cancel(mAnomalyAlarmListener); |
| } finally { |
| Binder.restoreCallingIdentity(callingToken); |
| } |
| } |
| |
| @Override // Binder call |
| public void setAlarmForSubscriberTriggering(long timestampMs) { |
| StatsCompanion.enforceStatsdCallingUid(); |
| if (DEBUG) { |
| Log.d(TAG, |
| "Setting periodic alarm in about " + (timestampMs |
| - SystemClock.elapsedRealtime())); |
| } |
| final long callingToken = Binder.clearCallingIdentity(); |
| try { |
| // using ELAPSED_REALTIME, not ELAPSED_REALTIME_WAKEUP, so if device is asleep, will |
| // only fire when it awakens. |
| mAlarmManager.setExact(AlarmManager.ELAPSED_REALTIME, timestampMs, TAG + ".periodic", |
| mPeriodicAlarmListener, mHandler); |
| } finally { |
| Binder.restoreCallingIdentity(callingToken); |
| } |
| } |
| |
| @Override // Binder call |
| public void cancelAlarmForSubscriberTriggering() { |
| StatsCompanion.enforceStatsdCallingUid(); |
| if (DEBUG) { |
| Log.d(TAG, "Cancelling periodic alarm"); |
| } |
| final long callingToken = Binder.clearCallingIdentity(); |
| try { |
| mAlarmManager.cancel(mPeriodicAlarmListener); |
| } finally { |
| Binder.restoreCallingIdentity(callingToken); |
| } |
| } |
| |
| @Override // Binder call |
| public void setPullingAlarm(long nextPullTimeMs) { |
| StatsCompanion.enforceStatsdCallingUid(); |
| if (DEBUG) { |
| Log.d(TAG, "Setting pulling alarm in about " |
| + (nextPullTimeMs - SystemClock.elapsedRealtime())); |
| } |
| final long callingToken = Binder.clearCallingIdentity(); |
| try { |
| // using ELAPSED_REALTIME, not ELAPSED_REALTIME_WAKEUP, so if device is asleep, will |
| // only fire when it awakens. |
| mAlarmManager.setExact(AlarmManager.ELAPSED_REALTIME, nextPullTimeMs, TAG + ".pull", |
| mPullingAlarmListener, mHandler); |
| } finally { |
| Binder.restoreCallingIdentity(callingToken); |
| } |
| } |
| |
| @Override // Binder call |
| public void cancelPullingAlarm() { |
| StatsCompanion.enforceStatsdCallingUid(); |
| if (DEBUG) { |
| Log.d(TAG, "Cancelling pulling alarm"); |
| } |
| final long callingToken = Binder.clearCallingIdentity(); |
| try { |
| mAlarmManager.cancel(mPullingAlarmListener); |
| } finally { |
| Binder.restoreCallingIdentity(callingToken); |
| } |
| } |
| |
| @Override // Binder call |
| public void statsdReady() { |
| StatsCompanion.enforceStatsdCallingUid(); |
| if (DEBUG) { |
| Log.d(TAG, "learned that statsdReady"); |
| } |
| sayHiToStatsd(); // tell statsd that we're ready too and link to it |
| |
| final Intent intent = new Intent(StatsManager.ACTION_STATSD_STARTED); |
| // Retrieve list of broadcast receivers for this broadcast & send them directed broadcasts |
| // to wake them up (if they're in background). |
| List<ResolveInfo> resolveInfos = |
| mContext.getPackageManager().queryBroadcastReceiversAsUser( |
| intent, 0, UserHandle.SYSTEM); |
| if (resolveInfos == null || resolveInfos.isEmpty()) { |
| return; // No need to send broadcast. |
| } |
| |
| for (ResolveInfo resolveInfo : resolveInfos) { |
| Intent intentToSend = new Intent(intent); |
| intentToSend.setComponent(new ComponentName( |
| resolveInfo.activityInfo.applicationInfo.packageName, |
| resolveInfo.activityInfo.name)); |
| mContext.sendBroadcastAsUser(intentToSend, UserHandle.SYSTEM, |
| android.Manifest.permission.DUMP); |
| } |
| } |
| |
| @Override // Binder call |
| public void triggerUidSnapshot() { |
| StatsCompanion.enforceStatsdCallingUid(); |
| synchronized (sStatsdLock) { |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| informAllUidsLocked(mContext); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Failed to trigger uid snapshot.", e); |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| } |
| |
| @Override // Binder call |
| public boolean checkPermission(String permission, int pid, int uid) { |
| StatsCompanion.enforceStatsdCallingUid(); |
| return mContext.checkPermission(permission, pid, uid) == PackageManager.PERMISSION_GRANTED; |
| } |
| |
| // Statsd related code |
| |
| /** |
| * Fetches the statsd IBinder service. This is a blocking call. |
| * Note: This should only be called from {@link #sayHiToStatsd()}. All other clients should use |
| * the cached sStatsd via {@link #getStatsdNonblocking()}. |
| */ |
| private IStatsd fetchStatsdService(StatsdDeathRecipient deathRecipient) { |
| synchronized (sStatsdLock) { |
| if (sStatsd == null) { |
| sStatsd = IStatsd.Stub.asInterface(StatsFrameworkInitializer |
| .getStatsServiceManager() |
| .getStatsdServiceRegisterer() |
| .get()); |
| if (sStatsd != null) { |
| try { |
| sStatsd.asBinder().linkToDeath(deathRecipient, /* flags */ 0); |
| } catch (RemoteException e) { |
| Log.e(TAG, "linkToDeath(StatsdDeathRecipient) failed"); |
| statsdNotReadyLocked(); |
| } |
| } |
| } |
| return sStatsd; |
| } |
| } |
| |
| /** |
| * Now that the android system is ready, StatsCompanion is ready too, so inform statsd. |
| */ |
| void systemReady() { |
| if (DEBUG) Log.d(TAG, "Learned that systemReady"); |
| sayHiToStatsd(); |
| } |
| |
| void setStatsManagerService(StatsManagerService statsManagerService) { |
| mStatsManagerService = statsManagerService; |
| } |
| |
| /** |
| * Tells statsd that statscompanion is ready. If the binder call returns, link to |
| * statsd. |
| */ |
| private void sayHiToStatsd() { |
| if (getStatsdNonblocking() != null) { |
| Log.e(TAG, "Trying to fetch statsd, but it was already fetched", |
| new IllegalStateException( |
| "sStatsd is not null when being fetched")); |
| return; |
| } |
| StatsdDeathRecipient deathRecipient = new StatsdDeathRecipient(); |
| IStatsd statsd = fetchStatsdService(deathRecipient); |
| if (statsd == null) { |
| Log.i(TAG, |
| "Could not yet find statsd to tell it that StatsCompanion is " |
| + "alive."); |
| return; |
| } |
| mStatsManagerService.statsdReady(statsd); |
| if (DEBUG) Log.d(TAG, "Saying hi to statsd"); |
| try { |
| statsd.statsCompanionReady(); |
| |
| cancelAnomalyAlarm(); |
| cancelPullingAlarm(); |
| |
| BroadcastReceiver appUpdateReceiver = new AppUpdateReceiver(); |
| BroadcastReceiver userUpdateReceiver = new UserUpdateReceiver(); |
| BroadcastReceiver shutdownEventReceiver = new ShutdownEventReceiver(); |
| |
| // Setup broadcast receiver for updates. |
| IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_REPLACED); |
| filter.addAction(Intent.ACTION_PACKAGE_ADDED); |
| filter.addAction(Intent.ACTION_PACKAGE_REMOVED); |
| filter.addDataScheme("package"); |
| mContext.registerReceiverForAllUsers(appUpdateReceiver, filter, null, null); |
| |
| // Setup receiver for user initialize (which happens once for a new user) |
| // and |
| // if a user is removed. |
| filter = new IntentFilter(Intent.ACTION_USER_INITIALIZE); |
| filter.addAction(Intent.ACTION_USER_REMOVED); |
| mContext.registerReceiverForAllUsers(userUpdateReceiver, filter, null, null); |
| |
| // Setup receiver for device reboots or shutdowns. |
| filter = new IntentFilter(Intent.ACTION_REBOOT); |
| filter.addAction(Intent.ACTION_SHUTDOWN); |
| mContext.registerReceiverForAllUsers( |
| shutdownEventReceiver, filter, null, null); |
| |
| // Only add the receivers if the registration is successful. |
| deathRecipient.addRegisteredBroadcastReceivers( |
| List.of(appUpdateReceiver, userUpdateReceiver, shutdownEventReceiver)); |
| |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| // Pull the latest state of UID->app name, version mapping when |
| // statsd starts. |
| informAllUidsLocked(mContext); |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| Log.i(TAG, "Told statsd that StatsCompanionService is alive."); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Failed to inform statsd that statscompanion is ready", e); |
| } |
| } |
| |
| private class StatsdDeathRecipient implements IBinder.DeathRecipient { |
| |
| private List<BroadcastReceiver> mReceiversToUnregister; |
| |
| StatsdDeathRecipient() { |
| mReceiversToUnregister = new ArrayList<>(); |
| } |
| |
| public void addRegisteredBroadcastReceivers(List<BroadcastReceiver> receivers) { |
| synchronized (sStatsdLock) { |
| mReceiversToUnregister.addAll(receivers); |
| } |
| } |
| |
| @Override |
| public void binderDied() { |
| Log.i(TAG, "Statsd is dead - erase all my knowledge, except pullers"); |
| synchronized (sStatsdLock) { |
| long now = SystemClock.elapsedRealtime(); |
| for (Long timeMillis : mDeathTimeMillis) { |
| long ageMillis = now - timeMillis; |
| if (ageMillis > MILLIS_IN_A_DAY) { |
| mDeathTimeMillis.remove(timeMillis); |
| } |
| } |
| for (Long timeMillis : mDeletedFiles.keySet()) { |
| long ageMillis = now - timeMillis; |
| if (ageMillis > MILLIS_IN_A_DAY * 7) { |
| mDeletedFiles.remove(timeMillis); |
| } |
| } |
| mDeathTimeMillis.add(now); |
| if (mDeathTimeMillis.size() >= DEATH_THRESHOLD) { |
| mDeathTimeMillis.clear(); |
| File[] configs = new File(CONFIG_DIR).listFiles(); |
| if (configs != null && configs.length > 0) { |
| String fileName = configs[0].getName(); |
| if (configs[0].delete()) { |
| mDeletedFiles.put(now, fileName); |
| } |
| } |
| } |
| // We only unregister in binder death becaseu receivers can only be unregistered |
| // once, or an IllegalArgumentException is thrown. |
| for (BroadcastReceiver receiver: mReceiversToUnregister) { |
| mContext.unregisterReceiver(receiver); |
| } |
| statsdNotReadyLocked(); |
| } |
| } |
| } |
| |
| private void statsdNotReadyLocked() { |
| sStatsd = null; |
| mStatsManagerService.statsdNotReady(); |
| } |
| |
| @Override |
| protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { |
| if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) |
| != PackageManager.PERMISSION_GRANTED) { |
| return; |
| } |
| |
| synchronized (sStatsdLock) { |
| writer.println( |
| "Number of configuration files deleted: " + mDeletedFiles.size()); |
| if (mDeletedFiles.size() > 0) { |
| writer.println(" timestamp, deleted file name"); |
| } |
| long lastBootMillis = |
| SystemClock.currentThreadTimeMillis() - SystemClock.elapsedRealtime(); |
| for (Long elapsedMillis : mDeletedFiles.keySet()) { |
| long deletionMillis = lastBootMillis + elapsedMillis; |
| writer.println( |
| " " + deletionMillis + ", " + mDeletedFiles.get(elapsedMillis)); |
| } |
| } |
| } |
| } |