Add tracing for receiver registration and un-registration. (8e7ebafd) · Commits · e / os / android_frameworks_base

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

+76 −0

Original line number	Diff line number	Diff line
		@@ -14606,6 +14606,53 @@ public class ActivityManagerService extends IActivityManager.Stub
		public Intent registerReceiverWithFeature(IApplicationThread caller, String callerPackage,
		String callerFeatureId, String receiverId, IIntentReceiver receiver,
		IntentFilter filter, String permission, int userId, int flags) {
		traceRegistrationBegin(receiverId, receiver, filter, userId);
		try {
		return registerReceiverWithFeatureTraced(caller, callerPackage, callerFeatureId,
		receiverId, receiver, filter, permission, userId, flags);
		} finally {
		traceRegistrationEnd();
		}
		}

		private static void traceRegistrationBegin(String receiverId, IIntentReceiver receiver,
		IntentFilter filter, int userId) {
		if (!Flags.traceReceiverRegistration()) {
		return;
		}
		if (Trace.isTagEnabled(Trace.TRACE_TAG_ACTIVITY_MANAGER)) {
		final StringBuilder sb = new StringBuilder("registerReceiver: ");
		sb.append(Binder.getCallingUid()); sb.append('/');
		sb.append(receiverId == null ? "null" : receiverId); sb.append('/');
		final int actionsCount = filter.countActions();
		if (actionsCount > 0) {
		for (int i = 0; i < actionsCount; ++i) {
		sb.append(filter.getAction(i));
		if (i != actionsCount - 1) sb.append(',');
		}
		} else {
		sb.append("null");
		}
		sb.append('/');
		sb.append('u'); sb.append(userId); sb.append('/');
		sb.append(receiver == null ? "null" : receiver.asBinder());
		Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, sb.toString());
		}
		}

		private static void traceRegistrationEnd() {
		if (!Flags.traceReceiverRegistration()) {
		return;
		}
		if (Trace.isTagEnabled(Trace.TRACE_TAG_ACTIVITY_MANAGER)) {
		Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
		}
		}

		private Intent registerReceiverWithFeatureTraced(IApplicationThread caller,
		String callerPackage, String callerFeatureId, String receiverId,
		IIntentReceiver receiver, IntentFilter filter, String permission,
		int userId, int flags) {
		enforceNotIsolatedCaller("registerReceiver");
		ArrayList<StickyBroadcast> stickyBroadcasts = null;
		ProcessRecord callerApp = null;
		@@ -14921,6 +14968,35 @@ public class ActivityManagerService extends IActivityManager.Stub
		}

		public void unregisterReceiver(IIntentReceiver receiver) {
		traceUnregistrationBegin(receiver);
		try {
		unregisterReceiverTraced(receiver);
		} finally {
		traceUnregistrationEnd();
		}
		}

		private static void traceUnregistrationBegin(IIntentReceiver receiver) {
		if (!Flags.traceReceiverRegistration()) {
		return;
		}
		if (Trace.isTagEnabled(Trace.TRACE_TAG_ACTIVITY_MANAGER)) {
		Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER,
		TextUtils.formatSimple("unregisterReceiver: %d/%s", Binder.getCallingUid(),
		receiver == null ? "null" : receiver.asBinder()));
		}
		}

		private static void traceUnregistrationEnd() {
		if (!Flags.traceReceiverRegistration()) {
		return;
		}
		if (Trace.isTagEnabled(Trace.TRACE_TAG_ACTIVITY_MANAGER)) {
		Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
		}
		}

		private void unregisterReceiverTraced(IIntentReceiver receiver) {
		if (DEBUG_BROADCAST) Slog.v(TAG_BROADCAST, "Unregister receiver: " + receiver);

		final long origId = Binder.clearCallingIdentity();

services/core/java/com/android/server/am/flags.aconfig

+11 −0

Original line number	Diff line number	Diff line
		@@ -95,3 +95,14 @@ flag {
		bug: "315468967"
		is_fixed_read_only: true
		}

		flag {
		namespace: "backstage_power"
		name: "trace_receiver_registration"
		description: "Add tracing for broadcast receiver registration and un-registration"
		bug: "336385821"
		is_fixed_read_only: true
		metadata {
		purpose: PURPOSE_BUGFIX
		}
		}