| /* |
| * Copyright (C) 2008 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 com.android.server.am.ActivityManagerService; |
| |
| import android.app.AlarmManager; |
| import android.app.PendingIntent; |
| import android.content.BroadcastReceiver; |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.os.Debug; |
| import android.os.Handler; |
| import android.os.Message; |
| import android.os.Process; |
| import android.os.SystemClock; |
| import android.os.SystemProperties; |
| import android.provider.Settings; |
| import android.util.Config; |
| import android.util.EventLog; |
| import android.util.Log; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Calendar; |
| |
| /** This class calls its monitor every minute. Killing this process if they don't return **/ |
| public class Watchdog extends Thread { |
| static final String TAG = "Watchdog"; |
| static final boolean localLOGV = false || Config.LOGV; |
| |
| // Set this to true to use debug default values. |
| static final boolean DB = false; |
| |
| static final int MONITOR = 2718; |
| static final int GLOBAL_PSS = 2719; |
| |
| static final int TIME_TO_WAIT = DB ? 15*1000 : 60*1000; |
| |
| static final int MEMCHECK_DEFAULT_INTERVAL = DB ? 30 : 30*60; // 30 minutes |
| static final int MEMCHECK_DEFAULT_LOG_REALTIME_INTERVAL = DB ? 60 : 2*60*60; // 2 hours |
| static final int MEMCHECK_DEFAULT_SYSTEM_SOFT_THRESHOLD = (DB ? 10:16)*1024*1024; // 16MB |
| static final int MEMCHECK_DEFAULT_SYSTEM_HARD_THRESHOLD = (DB ? 14:20)*1024*1024; // 20MB |
| static final int MEMCHECK_DEFAULT_PHONE_SOFT_THRESHOLD = (DB ? 4:8)*1024*1024; // 8MB |
| static final int MEMCHECK_DEFAULT_PHONE_HARD_THRESHOLD = (DB ? 8:12)*1024*1024; // 12MB |
| |
| static final int MEMCHECK_DEFAULT_EXEC_START_TIME = 1*60*60; // 1:00am |
| static final int MEMCHECK_DEFAULT_EXEC_END_TIME = 5*60*60; // 5:00am |
| static final int MEMCHECK_DEFAULT_MIN_SCREEN_OFF = DB ? 1*60 : 5*60; // 5 minutes |
| static final int MEMCHECK_DEFAULT_MIN_ALARM = DB ? 1*60 : 3*60; // 3 minutes |
| static final int MEMCHECK_DEFAULT_RECHECK_INTERVAL = DB ? 1*60 : 5*60; // 5 minutes |
| |
| static final int REBOOT_DEFAULT_INTERVAL = DB ? 1 : 0; // never force reboot |
| static final int REBOOT_DEFAULT_START_TIME = 3*60*60; // 3:00am |
| static final int REBOOT_DEFAULT_WINDOW = 60*60; // within 1 hour |
| |
| static final String CHECKUP_ACTION = "com.android.service.Watchdog.CHECKUP"; |
| static final String REBOOT_ACTION = "com.android.service.Watchdog.REBOOT"; |
| |
| static Watchdog sWatchdog; |
| |
| /* This handler will be used to post message back onto the main thread */ |
| final Handler mHandler; |
| final Runnable mGlobalPssCollected; |
| final ArrayList<Monitor> mMonitors = new ArrayList<Monitor>(); |
| ContentResolver mResolver; |
| BatteryService mBattery; |
| PowerManagerService mPower; |
| AlarmManagerService mAlarm; |
| ActivityManagerService mActivity; |
| boolean mCompleted; |
| boolean mForceKillSystem; |
| Monitor mCurrentMonitor; |
| |
| PssRequestor mPhoneReq; |
| int mPhonePid; |
| int mPhonePss; |
| |
| long mLastMemCheckTime = -(MEMCHECK_DEFAULT_INTERVAL*1000); |
| boolean mHavePss; |
| long mLastMemCheckRealtime = -(MEMCHECK_DEFAULT_LOG_REALTIME_INTERVAL*1000); |
| boolean mHaveGlobalPss; |
| final MemMonitor mSystemMemMonitor = new MemMonitor("system", |
| Settings.Secure.MEMCHECK_SYSTEM_ENABLED, |
| Settings.Secure.MEMCHECK_SYSTEM_SOFT_THRESHOLD, |
| MEMCHECK_DEFAULT_SYSTEM_SOFT_THRESHOLD, |
| Settings.Secure.MEMCHECK_SYSTEM_HARD_THRESHOLD, |
| MEMCHECK_DEFAULT_SYSTEM_HARD_THRESHOLD); |
| final MemMonitor mPhoneMemMonitor = new MemMonitor("com.android.phone", |
| Settings.Secure.MEMCHECK_PHONE_ENABLED, |
| Settings.Secure.MEMCHECK_PHONE_SOFT_THRESHOLD, |
| MEMCHECK_DEFAULT_PHONE_SOFT_THRESHOLD, |
| Settings.Secure.MEMCHECK_PHONE_HARD_THRESHOLD, |
| MEMCHECK_DEFAULT_PHONE_HARD_THRESHOLD); |
| |
| final Calendar mCalendar = Calendar.getInstance(); |
| long mMemcheckLastTime; |
| long mMemcheckExecStartTime; |
| long mMemcheckExecEndTime; |
| int mMinScreenOff = MEMCHECK_DEFAULT_MIN_SCREEN_OFF; |
| int mMinAlarm = MEMCHECK_DEFAULT_MIN_ALARM; |
| boolean mNeedScheduledCheck; |
| PendingIntent mCheckupIntent; |
| PendingIntent mRebootIntent; |
| |
| long mBootTime; |
| int mRebootInterval; |
| |
| boolean mReqRebootNoWait; // should wait for one interval before reboot? |
| int mReqRebootInterval = -1; // >= 0 if a reboot has been requested |
| int mReqRebootStartTime = -1; // >= 0 if a specific start time has been requested |
| int mReqRebootWindow = -1; // >= 0 if a specific window has been requested |
| int mReqMinScreenOff = -1; // >= 0 if a specific screen off time has been requested |
| int mReqMinNextAlarm = -1; // >= 0 if specific time to next alarm has been requested |
| int mReqRecheckInterval= -1; // >= 0 if a specific recheck interval has been requested |
| |
| /** |
| * This class monitors the memory in a particular process. |
| */ |
| final class MemMonitor { |
| final String mProcessName; |
| final String mEnabledSetting; |
| final String mSoftSetting; |
| final String mHardSetting; |
| |
| int mSoftThreshold; |
| int mHardThreshold; |
| boolean mEnabled; |
| long mLastPss; |
| |
| static final int STATE_OK = 0; |
| static final int STATE_SOFT = 1; |
| static final int STATE_HARD = 2; |
| int mState; |
| |
| MemMonitor(String processName, String enabledSetting, |
| String softSetting, int defSoftThreshold, |
| String hardSetting, int defHardThreshold) { |
| mProcessName = processName; |
| mEnabledSetting = enabledSetting; |
| mSoftSetting = softSetting; |
| mHardSetting = hardSetting; |
| mSoftThreshold = defSoftThreshold; |
| mHardThreshold = defHardThreshold; |
| } |
| |
| void retrieveSettings(ContentResolver resolver) { |
| mSoftThreshold = Settings.Secure.getInt( |
| resolver, mSoftSetting, mSoftThreshold); |
| mHardThreshold = Settings.Secure.getInt( |
| resolver, mHardSetting, mHardThreshold); |
| mEnabled = Settings.Secure.getInt( |
| resolver, mEnabledSetting, 0) != 0; |
| } |
| |
| boolean checkLocked(long curTime, int pid, int pss) { |
| mLastPss = pss; |
| if (mLastPss < mSoftThreshold) { |
| mState = STATE_OK; |
| } else if (mLastPss < mHardThreshold) { |
| mState = STATE_SOFT; |
| } else { |
| mState = STATE_HARD; |
| } |
| EventLog.writeEvent(EventLogTags.WATCHDOG_PROC_PSS, mProcessName, pid, mLastPss); |
| |
| if (mState == STATE_OK) { |
| // Memory is good, don't recover. |
| return false; |
| } |
| |
| if (mState == STATE_HARD) { |
| // Memory is really bad, kill right now. |
| EventLog.writeEvent(EventLogTags.WATCHDOG_HARD_RESET, mProcessName, pid, |
| mHardThreshold, mLastPss); |
| return mEnabled; |
| } |
| |
| // It is time to schedule a reset... |
| // Check if we are currently within the time to kill processes due |
| // to memory use. |
| computeMemcheckTimesLocked(curTime); |
| String skipReason = null; |
| if (curTime < mMemcheckExecStartTime || curTime > mMemcheckExecEndTime) { |
| skipReason = "time"; |
| } else { |
| skipReason = shouldWeBeBrutalLocked(curTime); |
| } |
| EventLog.writeEvent(EventLogTags.WATCHDOG_SOFT_RESET, mProcessName, pid, |
| mSoftThreshold, mLastPss, skipReason != null ? skipReason : ""); |
| if (skipReason != null) { |
| mNeedScheduledCheck = true; |
| return false; |
| } |
| return mEnabled; |
| } |
| |
| void clear() { |
| mLastPss = 0; |
| mState = STATE_OK; |
| } |
| } |
| |
| /** |
| * Used for scheduling monitor callbacks and checking memory usage. |
| */ |
| final class HeartbeatHandler extends Handler { |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case GLOBAL_PSS: { |
| if (mHaveGlobalPss) { |
| // During the last pass we collected pss information, so |
| // now it is time to report it. |
| mHaveGlobalPss = false; |
| if (localLOGV) Log.v(TAG, "Received global pss, logging."); |
| logGlobalMemory(); |
| } |
| } break; |
| |
| case MONITOR: { |
| if (mHavePss) { |
| // During the last pass we collected pss information, so |
| // now it is time to report it. |
| mHavePss = false; |
| if (localLOGV) Log.v(TAG, "Have pss, checking memory."); |
| checkMemory(); |
| } |
| |
| if (mHaveGlobalPss) { |
| // During the last pass we collected pss information, so |
| // now it is time to report it. |
| mHaveGlobalPss = false; |
| if (localLOGV) Log.v(TAG, "Have global pss, logging."); |
| logGlobalMemory(); |
| } |
| |
| long now = SystemClock.uptimeMillis(); |
| |
| // See if we should force a reboot. |
| int rebootInterval = mReqRebootInterval >= 0 |
| ? mReqRebootInterval : Settings.Secure.getInt( |
| mResolver, Settings.Secure.REBOOT_INTERVAL, |
| REBOOT_DEFAULT_INTERVAL); |
| if (mRebootInterval != rebootInterval) { |
| mRebootInterval = rebootInterval; |
| // We have been running long enough that a reboot can |
| // be considered... |
| checkReboot(false); |
| } |
| |
| // See if we should check memory conditions. |
| long memCheckInterval = Settings.Secure.getLong( |
| mResolver, Settings.Secure.MEMCHECK_INTERVAL, |
| MEMCHECK_DEFAULT_INTERVAL) * 1000; |
| if ((mLastMemCheckTime+memCheckInterval) < now) { |
| // It is now time to collect pss information. This |
| // is async so we won't report it now. And to keep |
| // things simple, we will assume that everyone has |
| // reported back by the next MONITOR message. |
| mLastMemCheckTime = now; |
| if (localLOGV) Log.v(TAG, "Collecting memory usage."); |
| collectMemory(); |
| mHavePss = true; |
| |
| long memCheckRealtimeInterval = Settings.Secure.getLong( |
| mResolver, Settings.Secure.MEMCHECK_LOG_REALTIME_INTERVAL, |
| MEMCHECK_DEFAULT_LOG_REALTIME_INTERVAL) * 1000; |
| long realtimeNow = SystemClock.elapsedRealtime(); |
| if ((mLastMemCheckRealtime+memCheckRealtimeInterval) < realtimeNow) { |
| mLastMemCheckRealtime = realtimeNow; |
| if (localLOGV) Log.v(TAG, "Collecting global memory usage."); |
| collectGlobalMemory(); |
| mHaveGlobalPss = true; |
| } |
| } |
| |
| final int size = mMonitors.size(); |
| for (int i = 0 ; i < size ; i++) { |
| mCurrentMonitor = mMonitors.get(i); |
| mCurrentMonitor.monitor(); |
| } |
| |
| synchronized (Watchdog.this) { |
| mCompleted = true; |
| mCurrentMonitor = null; |
| } |
| } break; |
| } |
| } |
| } |
| |
| final class GlobalPssCollected implements Runnable { |
| public void run() { |
| mHandler.sendEmptyMessage(GLOBAL_PSS); |
| } |
| } |
| |
| final class CheckupReceiver extends BroadcastReceiver { |
| @Override |
| public void onReceive(Context c, Intent intent) { |
| if (localLOGV) Log.v(TAG, "Alarm went off, checking memory."); |
| checkMemory(); |
| } |
| } |
| |
| final class RebootReceiver extends BroadcastReceiver { |
| @Override |
| public void onReceive(Context c, Intent intent) { |
| if (localLOGV) Log.v(TAG, "Alarm went off, checking reboot."); |
| checkReboot(true); |
| } |
| } |
| |
| final class RebootRequestReceiver extends BroadcastReceiver { |
| @Override |
| public void onReceive(Context c, Intent intent) { |
| mReqRebootNoWait = intent.getIntExtra("nowait", 0) != 0; |
| mReqRebootInterval = intent.getIntExtra("interval", -1); |
| mReqRebootStartTime = intent.getIntExtra("startTime", -1); |
| mReqRebootWindow = intent.getIntExtra("window", -1); |
| mReqMinScreenOff = intent.getIntExtra("minScreenOff", -1); |
| mReqMinNextAlarm = intent.getIntExtra("minNextAlarm", -1); |
| mReqRecheckInterval = intent.getIntExtra("recheckInterval", -1); |
| EventLog.writeEvent(EventLogTags.WATCHDOG_REQUESTED_REBOOT, |
| mReqRebootNoWait ? 1 : 0, mReqRebootInterval, |
| mReqRecheckInterval, mReqRebootStartTime, |
| mReqRebootWindow, mReqMinScreenOff, mReqMinNextAlarm); |
| checkReboot(true); |
| } |
| } |
| |
| public interface Monitor { |
| void monitor(); |
| } |
| |
| public interface PssRequestor { |
| void requestPss(); |
| } |
| |
| public class PssStats { |
| public int mEmptyPss; |
| public int mEmptyCount; |
| public int mBackgroundPss; |
| public int mBackgroundCount; |
| public int mServicePss; |
| public int mServiceCount; |
| public int mVisiblePss; |
| public int mVisibleCount; |
| public int mForegroundPss; |
| public int mForegroundCount; |
| |
| public int mNoPssCount; |
| |
| public int mProcDeaths[] = new int[10]; |
| } |
| |
| public static Watchdog getInstance() { |
| if (sWatchdog == null) { |
| sWatchdog = new Watchdog(); |
| } |
| |
| return sWatchdog; |
| } |
| |
| private Watchdog() { |
| super("watchdog"); |
| mHandler = new HeartbeatHandler(); |
| mGlobalPssCollected = new GlobalPssCollected(); |
| } |
| |
| public void init(Context context, BatteryService battery, |
| PowerManagerService power, AlarmManagerService alarm, |
| ActivityManagerService activity) { |
| mResolver = context.getContentResolver(); |
| mBattery = battery; |
| mPower = power; |
| mAlarm = alarm; |
| mActivity = activity; |
| |
| context.registerReceiver(new CheckupReceiver(), |
| new IntentFilter(CHECKUP_ACTION)); |
| mCheckupIntent = PendingIntent.getBroadcast(context, |
| 0, new Intent(CHECKUP_ACTION), 0); |
| |
| context.registerReceiver(new RebootReceiver(), |
| new IntentFilter(REBOOT_ACTION)); |
| mRebootIntent = PendingIntent.getBroadcast(context, |
| 0, new Intent(REBOOT_ACTION), 0); |
| |
| context.registerReceiver(new RebootRequestReceiver(), |
| new IntentFilter(Intent.ACTION_REBOOT), |
| android.Manifest.permission.REBOOT, null); |
| |
| mBootTime = System.currentTimeMillis(); |
| } |
| |
| public void processStarted(PssRequestor req, String name, int pid) { |
| synchronized (this) { |
| if ("com.android.phone".equals(name)) { |
| mPhoneReq = req; |
| mPhonePid = pid; |
| mPhonePss = 0; |
| } |
| } |
| } |
| |
| public void reportPss(PssRequestor req, String name, int pss) { |
| synchronized (this) { |
| if (mPhoneReq == req) { |
| mPhonePss = pss; |
| } |
| } |
| } |
| |
| public void addMonitor(Monitor monitor) { |
| synchronized (this) { |
| if (isAlive()) { |
| throw new RuntimeException("Monitors can't be added while the Watchdog is running"); |
| } |
| mMonitors.add(monitor); |
| } |
| } |
| |
| /** |
| * Retrieve memory usage information from specific processes being |
| * monitored. This is an async operation, so must be done before doing |
| * memory checks. |
| */ |
| void collectMemory() { |
| synchronized (this) { |
| if (mPhoneReq != null) { |
| mPhoneReq.requestPss(); |
| } |
| } |
| } |
| |
| /** |
| * Retrieve memory usage over all application processes. This is an |
| * async operation, so must be done before doing memory checks. |
| */ |
| void collectGlobalMemory() { |
| mActivity.requestPss(mGlobalPssCollected); |
| } |
| |
| /** |
| * Check memory usage in the system, scheduling kills/reboots as needed. |
| * This always runs on the mHandler thread. |
| */ |
| void checkMemory() { |
| boolean needScheduledCheck; |
| long curTime; |
| long nextTime = 0; |
| |
| long recheckInterval = Settings.Secure.getLong( |
| mResolver, Settings.Secure.MEMCHECK_RECHECK_INTERVAL, |
| MEMCHECK_DEFAULT_RECHECK_INTERVAL) * 1000; |
| |
| mSystemMemMonitor.retrieveSettings(mResolver); |
| mPhoneMemMonitor.retrieveSettings(mResolver); |
| retrieveBrutalityAmount(); |
| |
| synchronized (this) { |
| curTime = System.currentTimeMillis(); |
| mNeedScheduledCheck = false; |
| |
| // How is the system doing? |
| if (mSystemMemMonitor.checkLocked(curTime, Process.myPid(), |
| (int)Process.getPss(Process.myPid()))) { |
| // Not good! Time to suicide. |
| mForceKillSystem = true; |
| notifyAll(); |
| return; |
| } |
| |
| // How is the phone process doing? |
| if (mPhoneReq != null) { |
| if (mPhoneMemMonitor.checkLocked(curTime, mPhonePid, |
| mPhonePss)) { |
| // Just kill the phone process and let it restart. |
| Log.i(TAG, "Watchdog is killing the phone process"); |
| Process.killProcess(mPhonePid); |
| } |
| } else { |
| mPhoneMemMonitor.clear(); |
| } |
| |
| needScheduledCheck = mNeedScheduledCheck; |
| if (needScheduledCheck) { |
| // Something is going bad, but now is not a good time to |
| // tear things down... schedule an alarm to check again soon. |
| nextTime = curTime + recheckInterval; |
| if (nextTime < mMemcheckExecStartTime) { |
| nextTime = mMemcheckExecStartTime; |
| } else if (nextTime >= mMemcheckExecEndTime){ |
| // Need to check during next exec time... so that needs |
| // to be computed. |
| if (localLOGV) Log.v(TAG, "Computing next time range"); |
| computeMemcheckTimesLocked(nextTime); |
| nextTime = mMemcheckExecStartTime; |
| } |
| |
| if (localLOGV) { |
| mCalendar.setTimeInMillis(nextTime); |
| Log.v(TAG, "Next Alarm Time: " + mCalendar); |
| } |
| } |
| } |
| |
| if (needScheduledCheck) { |
| if (localLOGV) Log.v(TAG, "Scheduling next memcheck alarm for " |
| + ((nextTime-curTime)/1000/60) + "m from now"); |
| mAlarm.remove(mCheckupIntent); |
| mAlarm.set(AlarmManager.RTC_WAKEUP, nextTime, mCheckupIntent); |
| } else { |
| if (localLOGV) Log.v(TAG, "No need to schedule a memcheck alarm!"); |
| mAlarm.remove(mCheckupIntent); |
| } |
| } |
| |
| final PssStats mPssStats = new PssStats(); |
| final String[] mMemInfoFields = new String[] { |
| "MemFree:", "Buffers:", "Cached:", |
| "Active:", "Inactive:", |
| "AnonPages:", "Mapped:", "Slab:", |
| "SReclaimable:", "SUnreclaim:", "PageTables:" }; |
| final long[] mMemInfoSizes = new long[mMemInfoFields.length]; |
| final String[] mVMStatFields = new String[] { |
| "pgfree ", "pgactivate ", "pgdeactivate ", |
| "pgfault ", "pgmajfault " }; |
| final long[] mVMStatSizes = new long[mVMStatFields.length]; |
| final long[] mPrevVMStatSizes = new long[mVMStatFields.length]; |
| long mLastLogGlobalMemoryTime; |
| |
| void logGlobalMemory() { |
| PssStats stats = mPssStats; |
| mActivity.collectPss(stats); |
| EventLog.writeEvent(EventLogTags.WATCHDOG_PSS_STATS, |
| stats.mEmptyPss, stats.mEmptyCount, |
| stats.mBackgroundPss, stats.mBackgroundCount, |
| stats.mServicePss, stats.mServiceCount, |
| stats.mVisiblePss, stats.mVisibleCount, |
| stats.mForegroundPss, stats.mForegroundCount, |
| stats.mNoPssCount); |
| EventLog.writeEvent(EventLogTags.WATCHDOG_PROC_STATS, |
| stats.mProcDeaths[0], stats.mProcDeaths[1], stats.mProcDeaths[2], |
| stats.mProcDeaths[3], stats.mProcDeaths[4]); |
| Process.readProcLines("/proc/meminfo", mMemInfoFields, mMemInfoSizes); |
| for (int i=0; i<mMemInfoSizes.length; i++) { |
| mMemInfoSizes[i] *= 1024; |
| } |
| EventLog.writeEvent(EventLogTags.WATCHDOG_MEMINFO, |
| (int)mMemInfoSizes[0], (int)mMemInfoSizes[1], (int)mMemInfoSizes[2], |
| (int)mMemInfoSizes[3], (int)mMemInfoSizes[4], |
| (int)mMemInfoSizes[5], (int)mMemInfoSizes[6], (int)mMemInfoSizes[7], |
| (int)mMemInfoSizes[8], (int)mMemInfoSizes[9], (int)mMemInfoSizes[10]); |
| long now = SystemClock.uptimeMillis(); |
| long dur = now - mLastLogGlobalMemoryTime; |
| mLastLogGlobalMemoryTime = now; |
| Process.readProcLines("/proc/vmstat", mVMStatFields, mVMStatSizes); |
| for (int i=0; i<mVMStatSizes.length; i++) { |
| long v = mVMStatSizes[i]; |
| mVMStatSizes[i] -= mPrevVMStatSizes[i]; |
| mPrevVMStatSizes[i] = v; |
| } |
| EventLog.writeEvent(EventLogTags.WATCHDOG_VMSTAT, dur, |
| (int)mVMStatSizes[0], (int)mVMStatSizes[1], (int)mVMStatSizes[2], |
| (int)mVMStatSizes[3], (int)mVMStatSizes[4]); |
| } |
| |
| void checkReboot(boolean fromAlarm) { |
| int rebootInterval = mReqRebootInterval >= 0 ? mReqRebootInterval |
| : Settings.Secure.getInt( |
| mResolver, Settings.Secure.REBOOT_INTERVAL, |
| REBOOT_DEFAULT_INTERVAL); |
| mRebootInterval = rebootInterval; |
| if (rebootInterval <= 0) { |
| // No reboot interval requested. |
| if (localLOGV) Log.v(TAG, "No need to schedule a reboot alarm!"); |
| mAlarm.remove(mRebootIntent); |
| return; |
| } |
| |
| long rebootStartTime = mReqRebootStartTime >= 0 ? mReqRebootStartTime |
| : Settings.Secure.getLong( |
| mResolver, Settings.Secure.REBOOT_START_TIME, |
| REBOOT_DEFAULT_START_TIME); |
| long rebootWindowMillis = (mReqRebootWindow >= 0 ? mReqRebootWindow |
| : Settings.Secure.getLong( |
| mResolver, Settings.Secure.REBOOT_WINDOW, |
| REBOOT_DEFAULT_WINDOW)) * 1000; |
| long recheckInterval = (mReqRecheckInterval >= 0 ? mReqRecheckInterval |
| : Settings.Secure.getLong( |
| mResolver, Settings.Secure.MEMCHECK_RECHECK_INTERVAL, |
| MEMCHECK_DEFAULT_RECHECK_INTERVAL)) * 1000; |
| |
| retrieveBrutalityAmount(); |
| |
| long realStartTime; |
| long now; |
| |
| synchronized (this) { |
| now = System.currentTimeMillis(); |
| realStartTime = computeCalendarTime(mCalendar, now, |
| rebootStartTime); |
| |
| long rebootIntervalMillis = rebootInterval*24*60*60*1000; |
| if (DB || mReqRebootNoWait || |
| (now-mBootTime) >= (rebootIntervalMillis-rebootWindowMillis)) { |
| if (fromAlarm && rebootWindowMillis <= 0) { |
| // No reboot window -- just immediately reboot. |
| EventLog.writeEvent(EventLogTags.WATCHDOG_SCHEDULED_REBOOT, now, |
| (int)rebootIntervalMillis, (int)rebootStartTime*1000, |
| (int)rebootWindowMillis, ""); |
| rebootSystem("Checkin scheduled forced"); |
| return; |
| } |
| |
| // Are we within the reboot window? |
| if (now < realStartTime) { |
| // Schedule alarm for next check interval. |
| realStartTime = computeCalendarTime(mCalendar, |
| now, rebootStartTime); |
| } else if (now < (realStartTime+rebootWindowMillis)) { |
| String doit = shouldWeBeBrutalLocked(now); |
| EventLog.writeEvent(EventLogTags.WATCHDOG_SCHEDULED_REBOOT, now, |
| (int)rebootInterval, (int)rebootStartTime*1000, |
| (int)rebootWindowMillis, doit != null ? doit : ""); |
| if (doit == null) { |
| rebootSystem("Checked scheduled range"); |
| return; |
| } |
| |
| // Schedule next alarm either within the window or in the |
| // next interval. |
| if ((now+recheckInterval) >= (realStartTime+rebootWindowMillis)) { |
| realStartTime = computeCalendarTime(mCalendar, |
| now + rebootIntervalMillis, rebootStartTime); |
| } else { |
| realStartTime = now + recheckInterval; |
| } |
| } else { |
| // Schedule alarm for next check interval. |
| realStartTime = computeCalendarTime(mCalendar, |
| now + rebootIntervalMillis, rebootStartTime); |
| } |
| } |
| } |
| |
| if (localLOGV) Log.v(TAG, "Scheduling next reboot alarm for " |
| + ((realStartTime-now)/1000/60) + "m from now"); |
| mAlarm.remove(mRebootIntent); |
| mAlarm.set(AlarmManager.RTC_WAKEUP, realStartTime, mRebootIntent); |
| } |
| |
| /** |
| * Perform a full reboot of the system. |
| */ |
| void rebootSystem(String reason) { |
| Log.i(TAG, "Rebooting system because: " + reason); |
| try { |
| android.os.Power.reboot(reason); |
| } catch (IOException e) { |
| Log.e(TAG, "Reboot failed!", e); |
| } |
| } |
| |
| /** |
| * Load the current Gservices settings for when |
| * {@link #shouldWeBeBrutalLocked} will allow the brutality to happen. |
| * Must not be called with the lock held. |
| */ |
| void retrieveBrutalityAmount() { |
| mMinScreenOff = (mReqMinScreenOff >= 0 ? mReqMinScreenOff |
| : Settings.Secure.getInt( |
| mResolver, Settings.Secure.MEMCHECK_MIN_SCREEN_OFF, |
| MEMCHECK_DEFAULT_MIN_SCREEN_OFF)) * 1000; |
| mMinAlarm = (mReqMinNextAlarm >= 0 ? mReqMinNextAlarm |
| : Settings.Secure.getInt( |
| mResolver, Settings.Secure.MEMCHECK_MIN_ALARM, |
| MEMCHECK_DEFAULT_MIN_ALARM)) * 1000; |
| } |
| |
| /** |
| * Determine whether it is a good time to kill, crash, or otherwise |
| * plunder the current situation for the overall long-term benefit of |
| * the world. |
| * |
| * @param curTime The current system time. |
| * @return Returns null if this is a good time, else a String with the |
| * text of why it is not a good time. |
| */ |
| String shouldWeBeBrutalLocked(long curTime) { |
| if (mBattery == null || !mBattery.isPowered()) { |
| return "battery"; |
| } |
| |
| if (mMinScreenOff >= 0 && (mPower == null || |
| mPower.timeSinceScreenOn() < mMinScreenOff)) { |
| return "screen"; |
| } |
| |
| if (mMinAlarm >= 0 && (mAlarm == null || |
| mAlarm.timeToNextAlarm() < mMinAlarm)) { |
| return "alarm"; |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Compute the times during which we next would like to perform process |
| * restarts. |
| * |
| * @param curTime The current system time. |
| */ |
| void computeMemcheckTimesLocked(long curTime) { |
| if (mMemcheckLastTime == curTime) { |
| return; |
| } |
| |
| mMemcheckLastTime = curTime; |
| |
| long memcheckExecStartTime = Settings.Secure.getLong( |
| mResolver, Settings.Secure.MEMCHECK_EXEC_START_TIME, |
| MEMCHECK_DEFAULT_EXEC_START_TIME); |
| long memcheckExecEndTime = Settings.Secure.getLong( |
| mResolver, Settings.Secure.MEMCHECK_EXEC_END_TIME, |
| MEMCHECK_DEFAULT_EXEC_END_TIME); |
| |
| mMemcheckExecEndTime = computeCalendarTime(mCalendar, curTime, |
| memcheckExecEndTime); |
| if (mMemcheckExecEndTime < curTime) { |
| memcheckExecStartTime += 24*60*60; |
| memcheckExecEndTime += 24*60*60; |
| mMemcheckExecEndTime = computeCalendarTime(mCalendar, curTime, |
| memcheckExecEndTime); |
| } |
| mMemcheckExecStartTime = computeCalendarTime(mCalendar, curTime, |
| memcheckExecStartTime); |
| |
| if (localLOGV) { |
| mCalendar.setTimeInMillis(curTime); |
| Log.v(TAG, "Current Time: " + mCalendar); |
| mCalendar.setTimeInMillis(mMemcheckExecStartTime); |
| Log.v(TAG, "Start Check Time: " + mCalendar); |
| mCalendar.setTimeInMillis(mMemcheckExecEndTime); |
| Log.v(TAG, "End Check Time: " + mCalendar); |
| } |
| } |
| |
| static long computeCalendarTime(Calendar c, long curTime, |
| long secondsSinceMidnight) { |
| |
| // start with now |
| c.setTimeInMillis(curTime); |
| |
| int val = (int)secondsSinceMidnight / (60*60); |
| c.set(Calendar.HOUR_OF_DAY, val); |
| secondsSinceMidnight -= val * (60*60); |
| val = (int)secondsSinceMidnight / 60; |
| c.set(Calendar.MINUTE, val); |
| c.set(Calendar.SECOND, (int)secondsSinceMidnight - (val*60)); |
| c.set(Calendar.MILLISECOND, 0); |
| |
| long newTime = c.getTimeInMillis(); |
| if (newTime < curTime) { |
| // The given time (in seconds since midnight) has already passed for today, so advance |
| // by one day (due to daylight savings, etc., the delta may differ from 24 hours). |
| c.add(Calendar.DAY_OF_MONTH, 1); |
| newTime = c.getTimeInMillis(); |
| } |
| |
| return newTime; |
| } |
| |
| @Override |
| public void run() { |
| while (true) { |
| mCompleted = false; |
| mHandler.sendEmptyMessage(MONITOR); |
| |
| synchronized (this) { |
| long timeout = TIME_TO_WAIT; |
| |
| // NOTE: We use uptimeMillis() here because we do not want to increment the time we |
| // wait while asleep. If the device is asleep then the thing that we are waiting |
| // to timeout on is asleep as well and won't have a chance to run. Causing a false |
| // positive on when to kill things. |
| long start = SystemClock.uptimeMillis(); |
| do { |
| try { |
| wait(timeout); |
| } catch (InterruptedException e) { |
| if (SystemProperties.getBoolean("ro.secure", false)) { |
| // If this is a secure build, just log the error. |
| Log.e("WatchDog", "Woof! Woof! Interrupter!"); |
| } else { |
| throw new AssertionError("Someone interrupted the watchdog"); |
| } |
| } |
| timeout = TIME_TO_WAIT - (SystemClock.uptimeMillis() - start); |
| } while (timeout > 0 && !mForceKillSystem); |
| |
| if (mCompleted && !mForceKillSystem) { |
| // The monitors have returned. |
| continue; |
| } |
| } |
| |
| // If we got here, that means that the system is most likely hung. |
| // First send a SIGQUIT so that we can see where it was hung. Then |
| // kill this process so that the system will restart. |
| String name = (mCurrentMonitor != null) ? mCurrentMonitor.getClass().getName() : "null"; |
| EventLog.writeEvent(EventLogTags.WATCHDOG, name); |
| Process.sendSignal(Process.myPid(), Process.SIGNAL_QUIT); |
| |
| // Wait a bit longer before killing so we can make sure that the stacks are captured. |
| try { |
| Thread.sleep(10*1000); |
| } catch (InterruptedException e) { |
| } |
| |
| // Only kill the process if the debugger is not attached. |
| if (!Debug.isDebuggerConnected()) { |
| Log.i(TAG, "Watchdog is killing the system process"); |
| Process.killProcess(Process.myPid()); |
| } |
| } |
| } |
| } |
