| /* |
| * Copyright (C) 2018 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; |
| |
| import android.app.AppGlobals; |
| import android.content.Context; |
| import android.content.pm.PackageInfo; |
| import android.content.pm.PackageManager; |
| import android.database.ContentObserver; |
| import android.net.Uri; |
| import android.os.Binder; |
| import android.os.RemoteException; |
| import android.os.SystemProperties; |
| import android.os.UserHandle; |
| import android.provider.Settings; |
| import android.util.ArrayMap; |
| import android.util.KeyValueListParser; |
| import android.util.Slog; |
| |
| import com.android.internal.os.BackgroundThread; |
| import com.android.internal.os.BinderCallsStats; |
| import com.android.internal.os.CachedDeviceState; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| public class BinderCallsStatsService extends Binder { |
| |
| private static final String TAG = "BinderCallsStatsService"; |
| |
| private static final String PERSIST_SYS_BINDER_CALLS_DETAILED_TRACKING |
| = "persist.sys.binder_calls_detailed_tracking"; |
| |
| /** Listens for flag changes. */ |
| private static class SettingsObserver extends ContentObserver { |
| private static final String SETTINGS_ENABLED_KEY = "enabled"; |
| private static final String SETTINGS_DETAILED_TRACKING_KEY = "detailed_tracking"; |
| private static final String SETTINGS_UPLOAD_DATA_KEY = "upload_data"; |
| private static final String SETTINGS_SAMPLING_INTERVAL_KEY = "sampling_interval"; |
| |
| private boolean mEnabled; |
| private final Uri mUri = Settings.Global.getUriFor(Settings.Global.BINDER_CALLS_STATS); |
| private final Context mContext; |
| private final KeyValueListParser mParser = new KeyValueListParser(','); |
| private final BinderCallsStats mBinderCallsStats; |
| |
| public SettingsObserver(Context context, BinderCallsStats binderCallsStats) { |
| super(BackgroundThread.getHandler()); |
| mContext = context; |
| context.getContentResolver().registerContentObserver(mUri, false, this, |
| UserHandle.USER_SYSTEM); |
| mBinderCallsStats = binderCallsStats; |
| // Always kick once to ensure that we match current state |
| onChange(); |
| } |
| |
| @Override |
| public void onChange(boolean selfChange, Uri uri, int userId) { |
| if (mUri.equals(uri)) { |
| onChange(); |
| } |
| } |
| |
| public void onChange() { |
| // Do not overwrite the default set manually. |
| if (!SystemProperties.get(PERSIST_SYS_BINDER_CALLS_DETAILED_TRACKING).isEmpty()) { |
| return; |
| } |
| |
| try { |
| mParser.setString(Settings.Global.getString(mContext.getContentResolver(), |
| Settings.Global.BINDER_CALLS_STATS)); |
| } catch (IllegalArgumentException e) { |
| Slog.e(TAG, "Bad binder call stats settings", e); |
| } |
| mBinderCallsStats.setDetailedTracking(mParser.getBoolean( |
| SETTINGS_DETAILED_TRACKING_KEY, BinderCallsStats.DETAILED_TRACKING_DEFAULT)); |
| mBinderCallsStats.setSamplingInterval(mParser.getInt( |
| SETTINGS_SAMPLING_INTERVAL_KEY, |
| BinderCallsStats.PERIODIC_SAMPLING_INTERVAL_DEFAULT)); |
| |
| |
| final boolean enabled = |
| mParser.getBoolean(SETTINGS_ENABLED_KEY, BinderCallsStats.ENABLED_DEFAULT); |
| if (mEnabled != enabled) { |
| Binder.setObserver(enabled ? mBinderCallsStats : null); |
| mEnabled = enabled; |
| mBinderCallsStats.reset(); |
| } |
| } |
| } |
| |
| /** |
| * @hide Only for use within the system server. |
| */ |
| public static class Internal { |
| private final BinderCallsStats mBinderCallsStats; |
| |
| Internal(BinderCallsStats binderCallsStats) { |
| this.mBinderCallsStats = binderCallsStats; |
| } |
| |
| public ArrayList<BinderCallsStats.ExportedCallStat> getExportedCallStats() { |
| return mBinderCallsStats.getExportedCallStats(); |
| } |
| |
| public ArrayMap<String, Integer> getExportedExceptionStats() { |
| return mBinderCallsStats.getExportedExceptionStats(); |
| } |
| } |
| |
| public static class LifeCycle extends SystemService { |
| private BinderCallsStatsService mService; |
| private BinderCallsStats mBinderCallsStats; |
| |
| public LifeCycle(Context context) { |
| super(context); |
| } |
| |
| @Override |
| public void onStart() { |
| mBinderCallsStats = new BinderCallsStats(new BinderCallsStats.Injector()); |
| mService = new BinderCallsStatsService(mBinderCallsStats); |
| publishLocalService(Internal.class, new Internal(mBinderCallsStats)); |
| publishBinderService("binder_calls_stats", mService); |
| boolean detailedTrackingEnabled = SystemProperties.getBoolean( |
| PERSIST_SYS_BINDER_CALLS_DETAILED_TRACKING, false); |
| |
| if (detailedTrackingEnabled) { |
| Slog.i(TAG, "Enabled CPU usage tracking for binder calls. Controlled by " |
| + PERSIST_SYS_BINDER_CALLS_DETAILED_TRACKING |
| + " or via dumpsys binder_calls_stats --enable-detailed-tracking"); |
| mBinderCallsStats.setDetailedTracking(true); |
| } |
| } |
| |
| @Override |
| public void onBootPhase(int phase) { |
| if (SystemService.PHASE_SYSTEM_SERVICES_READY == phase) { |
| CachedDeviceState.Readonly deviceState = getLocalService( |
| CachedDeviceState.Readonly.class); |
| mService.systemReady(getContext()); |
| mBinderCallsStats.setDeviceState(deviceState); |
| } |
| } |
| } |
| |
| private SettingsObserver mSettingsObserver; |
| private final BinderCallsStats mBinderCallsStats; |
| |
| BinderCallsStatsService(BinderCallsStats binderCallsStats) { |
| mBinderCallsStats = binderCallsStats; |
| } |
| |
| public void systemReady(Context context) { |
| mSettingsObserver = new SettingsObserver(context, mBinderCallsStats); |
| } |
| |
| public void reset() { |
| Slog.i(TAG, "Resetting stats"); |
| mBinderCallsStats.reset(); |
| } |
| |
| @Override |
| protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| boolean verbose = false; |
| if (args != null) { |
| for (final String arg : args) { |
| if ("-a".equals(arg)) { |
| verbose = true; |
| } else if ("--reset".equals(arg)) { |
| reset(); |
| pw.println("binder_calls_stats reset."); |
| return; |
| } else if ("--enable-detailed-tracking".equals(arg)) { |
| SystemProperties.set(PERSIST_SYS_BINDER_CALLS_DETAILED_TRACKING, "1"); |
| mBinderCallsStats.setDetailedTracking(true); |
| pw.println("Detailed tracking enabled"); |
| return; |
| } else if ("--disable-detailed-tracking".equals(arg)) { |
| SystemProperties.set(PERSIST_SYS_BINDER_CALLS_DETAILED_TRACKING, ""); |
| mBinderCallsStats.setDetailedTracking(false); |
| pw.println("Detailed tracking disabled"); |
| return; |
| } else if ("-h".equals(arg)) { |
| pw.println("binder_calls_stats commands:"); |
| pw.println(" --reset: Reset stats"); |
| pw.println(" --enable-detailed-tracking: Enables detailed tracking"); |
| pw.println(" --disable-detailed-tracking: Disables detailed tracking"); |
| return; |
| } else { |
| pw.println("Unknown option: " + arg); |
| } |
| } |
| } |
| mBinderCallsStats.dump(pw, getAppIdToPackagesMap(), verbose); |
| } |
| |
| private Map<Integer, String> getAppIdToPackagesMap() { |
| List<PackageInfo> packages; |
| try { |
| packages = AppGlobals.getPackageManager() |
| .getInstalledPackages(PackageManager.MATCH_UNINSTALLED_PACKAGES, |
| UserHandle.USER_SYSTEM).getList(); |
| } catch (RemoteException e) { |
| throw e.rethrowFromSystemServer(); |
| } |
| Map<Integer,String> map = new HashMap<>(); |
| for (PackageInfo pkg : packages) { |
| String name = pkg.packageName; |
| int uid = pkg.applicationInfo.uid; |
| // Use sharedUserId string as package name if there are collisions |
| if (pkg.sharedUserId != null && map.containsKey(uid)) { |
| name = "shared:" + pkg.sharedUserId; |
| } |
| map.put(uid, name); |
| } |
| return map; |
| } |
| |
| } |