Modern queue: enqueue multiple broadcast receivers (ace585b4) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/am/BroadcastQueueModernImpl.java

+191 −67

Original line number	Diff line number	Diff line
		@@ -87,6 +87,7 @@ import java.io.FileDescriptor;
		import java.io.PrintWriter;
		import java.text.SimpleDateFormat;
		import java.util.ArrayList;
		import java.util.Arrays;
		import java.util.Objects;
		import java.util.Set;
		import java.util.concurrent.CountDownLatch;
		@@ -140,6 +141,11 @@ class BroadcastQueueModernImpl extends BroadcastQueue {
		// We configure runnable size only once at boot; it'd be too complex to
		// try resizing dynamically at runtime
		mRunning = new BroadcastProcessQueue[mConstants.getMaxRunningQueues()];

		// Set up the statistics for batched broadcasts.
		final int batchSize = mConstants.MAX_BROADCAST_BATCH_SIZE;
		mReceiverBatch = new BroadcastReceiverBatch(batchSize);
		Slog.i(TAG, "maximum broadcast batch size " + batchSize);
		}

		/**
		@@ -202,12 +208,13 @@ class BroadcastQueueModernImpl extends BroadcastQueue {
		private final BroadcastConstants mBgConstants;

		/**
		* This single object allows the queue to dispatch receivers using scheduleReceiverList
		* without constantly allocating new ReceiverInfo objects or ArrayLists. This queue
		* implementation is known to have a maximum size of one entry.
		* The sole instance of BroadcastReceiverBatch that is used by scheduleReceiverWarmLocked().
		* The class is not a true singleton but only one instance is needed for the broadcast queue.
		* Although this is guarded by mService, it should never be accessed by any other function.
		*/
		@VisibleForTesting
		final BroadcastReceiverBatch mReceiverBatch = new BroadcastReceiverBatch(1);
		@GuardedBy("mService")
		final BroadcastReceiverBatch mReceiverBatch;

		/**
		* Timestamp when last {@link #testAllProcessQueues} failure was observed;
		@@ -576,7 +583,7 @@ class BroadcastQueueModernImpl extends BroadcastQueue {
		if (queue != null) {
		// If queue was running a broadcast, fail it
		if (queue.isActive()) {
		finishReceiverLocked(queue, BroadcastRecord.DELIVERY_FAILURE,
		finishReceiverActiveLocked(queue, BroadcastRecord.DELIVERY_FAILURE,
		"onApplicationCleanupLocked");
		}

		@@ -749,22 +756,25 @@ class BroadcastQueueModernImpl extends BroadcastQueue {
		* case where a broadcast is handled by a remote app, and the case where the
		* broadcast was finished locally without the remote app being involved.
		*/
		@GuardedBy("mService")
		private void scheduleReceiverWarmLocked(@NonNull BroadcastProcessQueue queue) {
		checkState(queue.isActive(), "isActive");
		BroadcastReceiverBatch batch = mReceiverBatch;
		batch.reset();

		final BroadcastRecord r = queue.getActive();
		final int index = queue.getActiveIndex();

		if (r.terminalCount == 0) {
		r.dispatchTime = SystemClock.uptimeMillis();
		r.dispatchRealTime = SystemClock.elapsedRealtime();
		r.dispatchClockTime = System.currentTimeMillis();
		while (collectReceiverList(queue, batch)) {
		if (batch.isFull()) {
		break;
		}

		if (maybeSkipReceiver(queue, r, index)) {
		return;
		if (!shouldContinueScheduling(queue)) {
		break;
		}
		dispatchReceivers(queue, r, index);
		if (queue.isEmpty()) {
		break;
		}
		queue.makeActiveNextPending();
		}
		processReceiverList(queue, batch);
		}

		/**
		@@ -772,36 +782,36 @@ class BroadcastQueueModernImpl extends BroadcastQueue {
		* skipped (and therefore no more work is required).
		*/
		private boolean maybeSkipReceiver(@NonNull BroadcastProcessQueue queue,
		@NonNull BroadcastRecord r, int index) {
		@NonNull BroadcastReceiverBatch batch, @NonNull BroadcastRecord r, int index) {
		final int oldDeliveryState = getDeliveryState(r, index);
		final ProcessRecord app = queue.app;
		final Object receiver = r.receivers.get(index);

		// If someone already finished this broadcast, finish immediately
		if (isDeliveryStateTerminal(oldDeliveryState)) {
		enqueueFinishReceiver(queue, oldDeliveryState, "already terminal state");
		batch.finish(r, index, oldDeliveryState, "already terminal state");
		return true;
		}

		// Consider additional cases where we'd want to finish immediately
		if (app.isInFullBackup()) {
		enqueueFinishReceiver(queue, BroadcastRecord.DELIVERY_SKIPPED, "isInFullBackup");
		batch.finish(r, index, BroadcastRecord.DELIVERY_SKIPPED, "isInFullBackup");
		return true;
		}
		if (mSkipPolicy.shouldSkip(r, receiver)) {
		enqueueFinishReceiver(queue, BroadcastRecord.DELIVERY_SKIPPED, "mSkipPolicy");
		batch.finish(r, index, BroadcastRecord.DELIVERY_SKIPPED, "mSkipPolicy");
		return true;
		}
		final Intent receiverIntent = r.getReceiverIntent(receiver);
		if (receiverIntent == null) {
		enqueueFinishReceiver(queue, BroadcastRecord.DELIVERY_SKIPPED, "getReceiverIntent");
		batch.finish(r, index, BroadcastRecord.DELIVERY_SKIPPED, "getReceiverIntent");
		return true;
		}

		// Ignore registered receivers from a previous PID
		if ((receiver instanceof BroadcastFilter)
		&& ((BroadcastFilter) receiver).receiverList.pid != app.getPid()) {
		enqueueFinishReceiver(queue, BroadcastRecord.DELIVERY_SKIPPED,
		batch.finish(r, index, BroadcastRecord.DELIVERY_SKIPPED,
		"BroadcastFilter for mismatched PID");
		return true;
		}
		@@ -809,17 +819,144 @@ class BroadcastQueueModernImpl extends BroadcastQueue {
		return false;
		}

		/**
		* Collect receivers into a list, to be dispatched in a single receiver list call. Return
		* true if remaining receivers in the queue should be examined, and false if the current list
		* is complete.
		*/
		private boolean collectReceiverList(@NonNull BroadcastProcessQueue queue,
		@NonNull BroadcastReceiverBatch batch) {
		final ProcessRecord app = queue.app;
		final BroadcastRecord r = queue.getActive();
		final int index = queue.getActiveIndex();
		final Object receiver = r.receivers.get(index);
		final Intent receiverIntent = r.getReceiverIntent(receiver);

		if (r.terminalCount == 0) {
		r.dispatchTime = SystemClock.uptimeMillis();
		r.dispatchRealTime = SystemClock.elapsedRealtime();
		r.dispatchClockTime = System.currentTimeMillis();
		}
		if (maybeSkipReceiver(queue, batch, r, index)) {
		return true;
		}

		final IApplicationThread thread = app.getOnewayThread();
		if (thread == null) {
		batch.finish(r, index, BroadcastRecord.DELIVERY_FAILURE, "missing IApplicationThread");
		return true;
		}

		if (receiver instanceof BroadcastFilter) {
		batch.schedule(((BroadcastFilter) receiver).receiverList.receiver,
		receiverIntent, r.resultCode, r.resultData, r.resultExtras,
		r.ordered, r.initialSticky, r.userId,
		app.mState.getReportedProcState(), r, index);
		// TODO: consider making registered receivers of unordered
		// broadcasts report results to detect ANRs
		if (!r.ordered) {
		batch.success(r, index, BroadcastRecord.DELIVERY_DELIVERED, "assuming delivered");
		return true;
		}
		} else {
		batch.schedule(receiverIntent, ((ResolveInfo) receiver).activityInfo,
		null, r.resultCode, r.resultData, r.resultExtras, r.ordered, r.userId,
		app.mState.getReportedProcState(), r, index);
		}

		return false;
		}

		/**
		* Process the information in a BroadcastReceiverBatch. Elements in the finish and success
		* lists are sent to enqueueFinishReceiver(). Elements in the receivers list are transmitted
		* to the target in a single binder call.
		*/
		private void processReceiverList(@NonNull BroadcastProcessQueue queue,
		@NonNull BroadcastReceiverBatch batch) {
		// Transmit the receiver list.
		final ProcessRecord app = queue.app;
		final IApplicationThread thread = app.getOnewayThread();

		batch.recordBatch(thread instanceof SameProcessApplicationThread);

		// Mark all the receivers that were discarded. None of these have actually been scheduled.
		for (int i = 0; i < batch.finished().size(); i++) {
		final var finish = batch.finished().get(i);
		enqueueFinishReceiver(queue, finish.r, finish.index, finish.deliveryState,
		finish.reason);
		}
		// Prepare for delivery of all receivers that are about to be scheduled.
		for (int i = 0; i < batch.cookies().size(); i++) {
		final var cookie = batch.cookies().get(i);
		prepareToDispatch(queue, cookie.r, cookie.index);
		}

		// Notify on dispatch. Note that receiver/cookies are recorded only if the thread is
		// non-null and the list will therefore be sent.
		for (int i = 0; i < batch.cookies().size(); i++) {
		// Cookies and receivers are 1:1
		final var cookie = batch.cookies().get(i);
		final BroadcastRecord r = cookie.r;
		final int index = cookie.index;
		final Object receiver = r.receivers.get(index);
		if (receiver instanceof BroadcastFilter) {
		notifyScheduleRegisteredReceiver(queue.app, r, (BroadcastFilter) receiver);
		} else {
		notifyScheduleReceiver(queue.app, r, (ResolveInfo) receiver);
		}
		}

		// Transmit the enqueued receivers. The thread cannot be null because the lock has been
		// held since collectReceiverList(), which will not add any receivers if the thread is null.
		boolean remoteFailed = false;
		if (batch.receivers().size() > 0) {
		try {
		thread.scheduleReceiverList(batch.receivers());
		} catch (RemoteException e) {
		// Log the failure of the first receiver in the list. Note that there must be at
		// least one receiver/cookie to reach this point in the code, which means
		// cookie[0] is a valid element.
		final var info = batch.cookies().get(0);
		final BroadcastRecord r = info.r;
		final int index = info.index;
		final Object receiver = r.receivers.get(index);
		final String msg = "Failed to schedule " + r + " to " + receiver
		+ " via " + app + ": " + e;
		logw(msg);
		app.killLocked("Can't deliver broadcast", ApplicationExitInfo.REASON_OTHER, true);
		remoteFailed = true;
		}
		}

		if (!remoteFailed) {
		// If transmission succeed, report all receivers that are assumed to be delivered.
		for (int i = 0; i < batch.success().size(); i++) {
		final var finish = batch.success().get(i);
		enqueueFinishReceiver(queue, finish.r, finish.index, finish.deliveryState,
		finish.reason);
		}
		} else {
		// If transmission failed, fail all receivers in the list.
		for (int i = 0; i < batch.cookies().size(); i++) {
		final var cookie = batch.cookies().get(i);
		enqueueFinishReceiver(queue, cookie.r, cookie.index,
		BroadcastRecord.DELIVERY_FAILURE, "remote app");
		}
		}
		}

		/**
		* Return true if this receiver should be assumed to have been delivered.
		*/
		private boolean isAssumedDelivered(@NonNull BroadcastRecord r, int index) {
		private boolean isAssumedDelivered(BroadcastRecord r, int index) {
		return (r.receivers.get(index) instanceof BroadcastFilter) && !r.ordered;
		}

		/**
		* A receiver is about to be dispatched. Start ANR timers, if necessary.
		*/
		private void dispatchReceivers(@NonNull BroadcastProcessQueue queue,
		private void prepareToDispatch(@NonNull BroadcastProcessQueue queue,
		@NonNull BroadcastRecord r, int index) {
		final ProcessRecord app = queue.app;
		final Object receiver = r.receivers.get(index);
		@@ -858,43 +995,6 @@ class BroadcastQueueModernImpl extends BroadcastQueue {
		if (DEBUG_BROADCAST) logv("Scheduling " + r + " to warm " + app);
		setDeliveryState(queue, app, r, index, receiver, BroadcastRecord.DELIVERY_SCHEDULED,
		"scheduleReceiverWarmLocked");

		final IApplicationThread thread = app.getOnewayThread();
		if (thread != null) {
		try {
		final Intent receiverIntent = r.getReceiverIntent(receiver);
		if (receiver instanceof BroadcastFilter) {
		notifyScheduleRegisteredReceiver(app, r, (BroadcastFilter) receiver);
		thread.scheduleReceiverList(mReceiverBatch.registeredReceiver(
		((BroadcastFilter) receiver).receiverList.receiver, receiverIntent,
		r.resultCode, r.resultData, r.resultExtras, r.ordered, r.initialSticky,
		r.userId, app.mState.getReportedProcState()));

		// TODO: consider making registered receivers of unordered
		// broadcasts report results to detect ANRs
		if (assumeDelivered) {
		enqueueFinishReceiver(queue, BroadcastRecord.DELIVERY_DELIVERED,
		"assuming delivered");
		}
		} else {
		notifyScheduleReceiver(app, r, (ResolveInfo) receiver);
		thread.scheduleReceiverList(mReceiverBatch.manifestReceiver(
		receiverIntent, ((ResolveInfo) receiver).activityInfo,
		null, r.resultCode, r.resultData, r.resultExtras, r.ordered, r.userId,
		app.mState.getReportedProcState()));
		}
		} catch (RemoteException e) {
		final String msg = "Failed to schedule " + r + " to " + receiver
		+ " via " + app + ": " + e;
		logw(msg);
		app.killLocked("Can't deliver broadcast", ApplicationExitInfo.REASON_OTHER,
		ApplicationExitInfo.SUBREASON_UNDELIVERED_BROADCAST, true);
		enqueueFinishReceiver(queue, BroadcastRecord.DELIVERY_FAILURE, "remote app");
		}
		} else {
		enqueueFinishReceiver(queue, BroadcastRecord.DELIVERY_FAILURE,
		"missing IApplicationThread");
		}
		}

		/**
		@@ -909,7 +1009,8 @@ class BroadcastQueueModernImpl extends BroadcastQueue {
		mService.mOomAdjuster.mCachedAppOptimizer.unfreezeTemporarily(
		app, OOM_ADJ_REASON_FINISH_RECEIVER);
		try {
		thread.scheduleReceiverList(mReceiverBatch.registeredReceiver(r.resultTo, r.intent,
		thread.scheduleReceiverList(mReceiverBatch.registeredReceiver(
		r.resultTo, r.intent,
		r.resultCode, r.resultData, r.resultExtras, false, r.initialSticky,
		r.userId, app.mState.getReportedProcState()));
		} catch (RemoteException e) {
		@@ -940,7 +1041,7 @@ class BroadcastQueueModernImpl extends BroadcastQueue {
		}

		private void deliveryTimeoutHardLocked(@NonNull BroadcastProcessQueue queue) {
		finishReceiverLocked(queue, BroadcastRecord.DELIVERY_TIMEOUT,
		finishReceiverActiveLocked(queue, BroadcastRecord.DELIVERY_TIMEOUT,
		"deliveryTimeoutHardLocked");
		}

		@@ -973,7 +1074,7 @@ class BroadcastQueueModernImpl extends BroadcastQueue {
		}
		}

		return finishReceiverLocked(queue, BroadcastRecord.DELIVERY_DELIVERED, "remote app");
		return finishReceiverActiveLocked(queue, BroadcastRecord.DELIVERY_DELIVERED, "remote app");
		}

		/**
		@@ -989,7 +1090,10 @@ class BroadcastQueueModernImpl extends BroadcastQueue {
		return queue.isRunnable() && queue.isProcessWarm() && !shouldRetire;
		}

		private boolean finishReceiverLocked(@NonNull BroadcastProcessQueue queue,
		/**
		* Terminate all active broadcasts on the queue.
		*/
		private boolean finishReceiverActiveLocked(@NonNull BroadcastProcessQueue queue,
		@DeliveryState int deliveryState, @NonNull String reason) {
		if (!queue.isActive()) {
		logw("Ignoring finish; no active broadcast for " + queue);
		@@ -1015,16 +1119,25 @@ class BroadcastQueueModernImpl extends BroadcastQueue {

		setDeliveryState(queue, app, r, index, receiver, deliveryState, reason);

		final boolean early = r != queue.getActive() \|\| index != queue.getActiveIndex();

		if (deliveryState == BroadcastRecord.DELIVERY_TIMEOUT) {
		r.anrCount++;
		if (app != null && !app.isDebugging()) {
		mService.appNotResponding(queue.app, TimeoutRecord.forBroadcastReceiver(r.intent));
		}
		} else {
		} else if (!early) {
		mLocalHandler.removeMessages(MSG_DELIVERY_TIMEOUT_SOFT, queue);
		mLocalHandler.removeMessages(MSG_DELIVERY_TIMEOUT_HARD, queue);
		}

		if (early) {
		// This is an early receiver that was transmitted as part of a group. The delivery
		// state has been updated but don't make any further decisions.
		traceEnd(cookie);
		return false;
		}

		final boolean res = shouldContinueScheduling(queue);
		if (res) {
		// We're on a roll; move onto the next broadcast for this process
		@@ -1705,6 +1818,17 @@ class BroadcastQueueModernImpl extends BroadcastQueue {
		ipw.decreaseIndent();
		ipw.println();

		ipw.println("Batch statistics:");
		ipw.increaseIndent();
		{
		final var stats = mReceiverBatch.getStatistics();
		ipw.println("Finished " + Arrays.toString(stats.finish));
		ipw.println("DispatchedLocal " + Arrays.toString(stats.local));
		ipw.println("DispatchedRemote " + Arrays.toString(stats.remote));
		}
		ipw.decreaseIndent();
		ipw.println();

		if (dumpConstants) {
		mConstants.dump(ipw);
		}