Track exception count using BinderCallStats. (9429bf57) · Commits · e / os / android_frameworks_base

core/java/android/os/Binder.java

+2 −1

Original line number	Diff line number	Diff line
		@@ -730,6 +730,7 @@ public class Binder implements IBinder {
		}
		res = onTransact(code, data, reply, flags);
		} catch (RemoteException\|RuntimeException e) {
		binderCallsStats.callThrewException(callSession);
		if (LOG_RUNTIME_EXCEPTION) {
		Log.w(TAG, "Caught a RuntimeException from the binder stub implementation.", e);
		}

core/java/com/android/internal/os/BinderCallsStats.java

+20 −2

Original line number	Diff line number	Diff line
		@@ -71,6 +71,7 @@ public class BinderCallsStats {

		s.mCpuTimeStarted = getThreadTimeMicro();
		s.mTimeStarted = getElapsedRealtimeNanos() / 1_000;
		s.exceptionThrown = false;
		return s;
		}

		@@ -98,6 +99,7 @@ public class BinderCallsStats {
		callStat.callCount++;
		callStat.latencyMicros += latencyDuration;
		callStat.cpuTimeMicros += duration;
		callStat.exceptionCount += s.exceptionThrown ? 1 : 0;
		}

		uidEntry.cpuTimeMicros += duration;
		@@ -108,6 +110,18 @@ public class BinderCallsStats {
		}
		}

		/**
		* Called if an exception is thrown while executing the binder transaction.
		*
		* <li>BinderCallsStats#callEnded will be called afterwards.
		* <li>Do not throw an exception in this method, it will swallow the original exception thrown
		* by the binder transaction.
		*/
		public void callThrewException(CallSession s) {
		Preconditions.checkNotNull(s);
		s.exceptionThrown = true;
		}

		public void dump(PrintWriter pw) {
		Map<Integer, Long> uidTimeMap = new HashMap<>();
		Map<Integer, Long> uidCallCountMap = new HashMap<>();
		@@ -134,7 +148,7 @@ public class BinderCallsStats {
		}
		}
		if (mDetailedTracking) {
		pw.println("Raw data (uid,call_desc,cpu_time_micros,latency_time_micros,call_count):");
		pw.println("Raw data (uid,call_desc,cpu_time_micros,latency_time_micros,exception_count,call_count):");
		entries.sort((o1, o2) -> {
		if (o1.cpuTimeMicros < o2.cpuTimeMicros) {
		return 1;
		@@ -157,8 +171,10 @@ public class BinderCallsStats {
		for (CallStat e : callStats) {
		sb.setLength(0);
		sb.append(" ")
		.append(uidEntry.uid).append(",").append(e).append(',').append(e.cpuTimeMicros)
		.append(uidEntry.uid).append(",").append(e)
		.append(',').append(e.cpuTimeMicros)
		.append(',').append(e.latencyMicros)
		.append(',').append(e.exceptionCount)
		.append(',').append(e.callCount);
		pw.println(sb);
		}
		@@ -225,6 +241,7 @@ public class BinderCallsStats {
		long cpuTimeMicros;
		long latencyMicros;
		long callCount;
		long exceptionCount;

		CallStat() {
		}
		@@ -262,6 +279,7 @@ public class BinderCallsStats {
		int mCallingUId;
		long mCpuTimeStarted;
		long mTimeStarted;
		boolean exceptionThrown;
		CallStat mCallStat = new CallStat();
		}