am a8eb5071: am 525322ec: am f9f740da: Merge "Support different watchdog... (c93af316) · Commits · e / os / android_frameworks_base

services/java/com/android/server/Watchdog.java

+77 −36

Original line number	Diff line number	Diff line
		@@ -58,7 +58,14 @@ public class Watchdog extends Thread {
		// Set this to true to have the watchdog record kernel thread stacks when it fires
		static final boolean RECORD_KERNEL_THREADS = true;

		static final int TIME_TO_WAIT = DB ? 51000 : 301000;
		static final long DEFAULT_TIMEOUT = DB ? 101000 : 601000;
		static final long CHECK_INTERVAL = DEFAULT_TIMEOUT / 2;

		// These are temporally ordered: larger values as lateness increases
		static final int COMPLETED = 0;
		static final int WAITING = 1;
		static final int WAITED_HALF = 2;
		static final int OVERDUE = 3;

		static final String[] NATIVE_STACKS_OF_INTEREST = new String[] {
		"/system/bin/mediaserver",
		@@ -87,13 +94,17 @@ public class Watchdog extends Thread {
		public final class HandlerChecker implements Runnable {
		private final Handler mHandler;
		private final String mName;
		private final long mWaitMax;
		private final ArrayList<Monitor> mMonitors = new ArrayList<Monitor>();
		private boolean mCompleted;
		private Monitor mCurrentMonitor;
		private long mStartTime;

		HandlerChecker(Handler handler, String name) {
		HandlerChecker(Handler handler, String name, long waitMaxMillis) {
		mHandler = handler;
		mName = name;
		mWaitMax = waitMaxMillis;
		mCompleted = true;
		}

		public void addMonitor(Monitor monitor) {
		@@ -111,13 +122,34 @@ public class Watchdog extends Thread {
		mCompleted = true;
		return;
		}

		if (!mCompleted) {
		// we already have a check in flight, so no need
		return;
		}

		mCompleted = false;
		mCurrentMonitor = null;
		mStartTime = SystemClock.uptimeMillis();
		mHandler.postAtFrontOfQueue(this);
		}

		public boolean isCompletedLocked() {
		return mCompleted;
		public boolean isOverdueLocked() {
		return (!mCompleted) && (SystemClock.uptimeMillis() > mStartTime + mWaitMax);
		}

		public int getCompletionStateLocked() {
		if (mCompleted) {
		return COMPLETED;
		} else {
		long latency = SystemClock.uptimeMillis() - mStartTime;
		if (latency < mWaitMax/2) {
		return WAITING;
		} else if (latency < mWaitMax) {
		return WAITED_HALF;
		}
		}
		return OVERDUE;
		}

		public Thread getThread() {
		@@ -186,16 +218,19 @@ public class Watchdog extends Thread {

		// The shared foreground thread is the main checker. It is where we
		// will also dispatch monitor checks and do other work.
		mMonitorChecker = new HandlerChecker(FgThread.getHandler(), "foreground thread");
		mMonitorChecker = new HandlerChecker(FgThread.getHandler(),
		"foreground thread", DEFAULT_TIMEOUT);
		mHandlerCheckers.add(mMonitorChecker);
		// Add checker for main thread. We only do a quick check since there
		// can be UI running on the thread.
		mHandlerCheckers.add(new HandlerChecker(new Handler(Looper.getMainLooper()),
		"main thread"));
		"main thread", DEFAULT_TIMEOUT));
		// Add checker for shared UI thread.
		mHandlerCheckers.add(new HandlerChecker(UiThread.getHandler(), "ui thread"));
		mHandlerCheckers.add(new HandlerChecker(UiThread.getHandler(),
		"ui thread", DEFAULT_TIMEOUT));
		// And also check IO thread.
		mHandlerCheckers.add(new HandlerChecker(IoThread.getHandler(), "i/o thread"));
		mHandlerCheckers.add(new HandlerChecker(IoThread.getHandler(),
		"i/o thread", DEFAULT_TIMEOUT));
		}

		public void init(Context context, BatteryService battery,
		@@ -242,11 +277,15 @@ public class Watchdog extends Thread {
		}

		public void addThread(Handler thread, String name) {
		addThread(thread, name, DEFAULT_TIMEOUT);
		}

		public void addThread(Handler thread, String name, long timeoutMillis) {
		synchronized (this) {
		if (isAlive()) {
		throw new RuntimeException("Threads can't be added once the Watchdog is running");
		}
		mHandlerCheckers.add(new HandlerChecker(thread, name));
		mHandlerCheckers.add(new HandlerChecker(thread, name, timeoutMillis));
		}
		}

		@@ -259,21 +298,20 @@ public class Watchdog extends Thread {
		pms.reboot(false, reason, false);
		}

		private boolean haveAllCheckersCompletedLocked() {
		private int evaluateCheckerCompletionLocked() {
		int state = COMPLETED;
		for (int i=0; i<mHandlerCheckers.size(); i++) {
		HandlerChecker hc = mHandlerCheckers.get(i);
		if (!hc.isCompletedLocked()) {
		return false;
		state = Math.max(state, hc.getCompletionStateLocked());
		}
		}
		return true;
		return state;
		}

		private ArrayList<HandlerChecker> getBlockedCheckersLocked() {
		ArrayList<HandlerChecker> checkers = new ArrayList<HandlerChecker>();
		for (int i=0; i<mHandlerCheckers.size(); i++) {
		HandlerChecker hc = mHandlerCheckers.get(i);
		if (!hc.isCompletedLocked()) {
		if (hc.isOverdueLocked()) {
		checkers.add(hc);
		}
		}
		@@ -299,15 +337,13 @@ public class Watchdog extends Thread {
		final String subject;
		final boolean allowRestart;
		synchronized (this) {
		long timeout = TIME_TO_WAIT;
		if (!waitedHalf) {
		// If we are not at the half-point of waiting, perform a
		// new set of checks. Otherwise we are still waiting for a previous set.
		long timeout = CHECK_INTERVAL;
		// Make sure we (re)spin the checkers that have become idle within
		// this wait-and-check interval
		for (int i=0; i<mHandlerCheckers.size(); i++) {
		HandlerChecker hc = mHandlerCheckers.get(i);
		hc.scheduleCheckLocked();
		}
		}

		// 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
		@@ -320,15 +356,18 @@ public class Watchdog extends Thread {
		} catch (InterruptedException e) {
		Log.wtf(TAG, e);
		}
		timeout = TIME_TO_WAIT - (SystemClock.uptimeMillis() - start);
		timeout = CHECK_INTERVAL - (SystemClock.uptimeMillis() - start);
		}

		if (haveAllCheckersCompletedLocked()) {
		// The monitors have returned.
		final int waitState = evaluateCheckerCompletionLocked();
		if (waitState == COMPLETED) {
		// The monitors have returned; reset
		waitedHalf = false;
		continue;
		}

		} else if (waitState == WAITING) {
		// still waiting but within their configured intervals; back off and recheck
		continue;
		} else if (waitState == WAITED_HALF) {
		if (!waitedHalf) {
		// We've waited half the deadlock-detection interval. Pull a stack
		// trace and wait another half.
		@@ -337,9 +376,11 @@ public class Watchdog extends Thread {
		ActivityManagerService.dumpStackTraces(true, pids, null, null,
		NATIVE_STACKS_OF_INTEREST);
		waitedHalf = true;
		}
		continue;
		}

		// something is overdue!
		blockedCheckers = getBlockedCheckersLocked();
		subject = describeCheckersLocked(blockedCheckers);
		allowRestart = mAllowRestart;

services/java/com/android/server/pm/PackageManagerService.java

+10 −1

Original line number	Diff line number	Diff line
		@@ -220,6 +220,14 @@ public class PackageManagerService extends IPackageManager.Stub {

		static final int REMOVE_CHATTY = 1<<16;

		/**
		* Timeout (in milliseconds) after which the watchdog should declare that
		* our handler thread is wedged. The usual default for such things is one
		* minute but we sometimes do very lengthy I/O operations on this thread,
		* such as installing multi-gigabyte applications, so ours needs to be longer.
		*/
		private static final long WATCHDOG_TIMEOUT = 10006010; // ten minutes

		/**
		* Whether verification is enabled by default.
		*/
		@@ -1115,7 +1123,8 @@ public class PackageManagerService extends IPackageManager.Stub {
		synchronized (mPackages) {
		mHandlerThread.start();
		mHandler = new PackageHandler(mHandlerThread.getLooper());
		Watchdog.getInstance().addThread(mHandler, mHandlerThread.getName());
		Watchdog.getInstance().addThread(mHandler, mHandlerThread.getName(),
		WATCHDOG_TIMEOUT);

		File dataDir = Environment.getDataDirectory();
		mAppDataDir = new File(dataDir, "data");