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Commit 4471744e authored by Olivier Gaillard's avatar Olivier Gaillard Committed by Android (Google) Code Review
Browse files

Merge "Adds an Observer interface to observes binder API calls."

parents 33757094 289ba402

apct-tests/perftests/core/src/android/os/BinderCallsStatsPerfTest.java

+3 −2
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ import android.support.test.filters.LargeTest; 
import android.support.test.runner.AndroidJUnit4;



import com.android.internal.os.BinderCallsStats;

import com.android.internal.os.BinderInternal.CallSession;



import java.util.Random;
@@ -61,7 +62,7 @@ public class BinderCallsStatsPerfTest { 
        Binder b = new Binder();

        int i = 0;

        while (state.keepRunning()) {

            BinderCallsStats.CallSession s = mBinderCallsStats.callStarted(b, i % 100);

            CallSession s = mBinderCallsStats.callStarted(b, i % 100);

            mBinderCallsStats.callEnded(s, 0, 0);

            i++;

        }
@@ -73,7 +74,7 @@ public class BinderCallsStatsPerfTest { 
        final BenchmarkState state = mPerfStatusReporter.getBenchmarkState();

        Binder b = new Binder();

        while (state.keepRunning()) {

            BinderCallsStats.CallSession s = mBinderCallsStats.callStarted(b, 0);

            CallSession s = mBinderCallsStats.callStarted(b, 0);

            mBinderCallsStats.callEnded(s, 0, 0);

        }

    }

core/java/android/os/Binder.java

+26 −6
Original line number Diff line number Diff line
@@ -22,8 +22,8 @@ import android.util.ExceptionUtils; 
import android.util.Log;

import android.util.Slog;



import com.android.internal.os.BinderCallsStats;

import com.android.internal.os.BinderInternal;

import com.android.internal.os.BinderInternal.CallSession;

import com.android.internal.util.FastPrintWriter;

import com.android.internal.util.FunctionalUtils.ThrowingRunnable;

import com.android.internal.util.FunctionalUtils.ThrowingSupplier;
@@ -92,6 +92,11 @@ public class Binder implements IBinder { 
     */

    private static volatile TransactionTracker sTransactionTracker = null;



    /**

     * Global observer for this process.

     */

    private static BinderInternal.Observer sObserver = null;



    /**

     * Guestimate of native memory associated with a Binder.

     */
@@ -106,6 +111,7 @@ public class Binder implements IBinder { 
                Binder.class.getClassLoader(), getNativeFinalizer(), NATIVE_ALLOCATION_SIZE);

    }





    // Transaction tracking code.



    /**
@@ -151,6 +157,15 @@ public class Binder implements IBinder { 
        return sTransactionTracker;

    }



    /**

     * Get the binder transaction observer for this process.

     *

     * @hide

     */

    public static void setObserver(@Nullable BinderInternal.Observer observer) {

        sObserver = observer;

    }



    /** {@hide} */

    static volatile boolean sWarnOnBlocking = false;
@@ -721,8 +736,10 @@ public class Binder implements IBinder { 
    // Entry point from android_util_Binder.cpp's onTransact

    private boolean execTransact(int code, long dataObj, long replyObj,

            int flags) {

        BinderCallsStats binderCallsStats = BinderCallsStats.getInstance();

        BinderCallsStats.CallSession callSession = binderCallsStats.callStarted(this, code);

        // Make sure the observer won't change while processing a transaction.

        final BinderInternal.Observer observer = sObserver;

        final CallSession callSession =

                observer != null ? observer.callStarted(this, code) : null;

        Parcel data = Parcel.obtain(dataObj);

        Parcel reply = Parcel.obtain(replyObj);

        // theoretically, we should call transact, which will call onTransact,
@@ -738,7 +755,9 @@ public class Binder implements IBinder { 
            }

            res = onTransact(code, data, reply, flags);

        } catch (RemoteException|RuntimeException e) {

            binderCallsStats.callThrewException(callSession, e);

            if (observer != null) {

                observer.callThrewException(callSession, e);

            }

            if (LOG_RUNTIME_EXCEPTION) {

                Log.w(TAG, "Caught a RuntimeException from the binder stub implementation.", e);

            }
@@ -770,9 +789,10 @@ public class Binder implements IBinder { 
        // to the main transaction loop to wait for another incoming transaction.  Either

        // way, strict mode begone!

        StrictMode.clearGatheredViolations();

        binderCallsStats.callEnded(callSession, requestSizeBytes, replySizeBytes);

        if (observer != null) {

            observer.callEnded(callSession, requestSizeBytes, replySizeBytes);

        }



        return res;

    }

}

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

+49 −76
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ import android.util.SparseArray; 


import com.android.internal.annotations.GuardedBy;

import com.android.internal.annotations.VisibleForTesting;

import com.android.internal.os.BinderInternal.CallSession;

import com.android.internal.util.Preconditions;



import java.io.PrintWriter;
@@ -47,7 +48,7 @@ import java.util.function.ToDoubleFunction; 
 * Collects statistics about CPU time spent per binder call across multiple dimensions, e.g.

 * per thread, uid or call description.

 */

public class BinderCallsStats {

public class BinderCallsStats implements BinderInternal.Observer {

    public static final boolean ENABLED_DEFAULT = true;

    public static final boolean DETAILED_TRACKING_DEFAULT = true;

    public static final int PERIODIC_SAMPLING_INTERVAL_DEFAULT = 10;
@@ -57,12 +58,9 @@ public class BinderCallsStats { 
    private static final int PERIODIC_SAMPLING_INTERVAL = 10;

    private static final int MAX_EXCEPTION_COUNT_SIZE = 50;

    private static final String EXCEPTION_COUNT_OVERFLOW_NAME = "overflow";

    private static final CallSession NOT_ENABLED = new CallSession();

    private static final BinderCallsStats sInstance = new BinderCallsStats(new Random());



    private volatile boolean mEnabled = ENABLED_DEFAULT;

    private volatile boolean mDetailedTracking = DETAILED_TRACKING_DEFAULT;

    private volatile int mPeriodicSamplingInterval = PERIODIC_SAMPLING_INTERVAL_DEFAULT;

    private boolean mDetailedTracking = DETAILED_TRACKING_DEFAULT;

    private int mPeriodicSamplingInterval = PERIODIC_SAMPLING_INTERVAL_DEFAULT;

    @GuardedBy("mLock")

    private final SparseArray<UidEntry> mUidEntries = new SparseArray<>();

    @GuardedBy("mLock")
@@ -72,28 +70,24 @@ public class BinderCallsStats { 
    private final Random mRandom;

    private long mStartTime = System.currentTimeMillis();



    @VisibleForTesting  // Use getInstance() instead.

    public BinderCallsStats(Random random) {

        this.mRandom = random;

    }



    @Override

    public CallSession callStarted(Binder binder, int code) {

        return callStarted(binder.getClass().getName(), code, binder.getTransactionName(code));

    }



    private CallSession callStarted(String className, int code, @Nullable String methodName) {

        if (!mEnabled) {

            return NOT_ENABLED;

        }



        CallSession s = mCallSessionsPool.poll();

        if (s == null) {

            s = new CallSession();

        }



        s.callStat.className = className;

        s.callStat.msg = code;

        s.callStat.methodName = methodName;

        s.className = className;

        s.transactionCode = code;

        s.methodName = methodName;

        s.exceptionThrown = false;

        s.cpuTimeStarted = -1;

        s.timeStarted = -1;
@@ -109,9 +103,9 @@ public class BinderCallsStats { 
        return s;

    }



    public void callEnded(CallSession s, int parcelRequestSize, int parcelReplySize) {

        Preconditions.checkNotNull(s);

        if (s == NOT_ENABLED) {

    @Override

    public void callEnded(@Nullable CallSession s, int parcelRequestSize, int parcelReplySize) {

        if (s == null) {

            return;

        }
@@ -124,10 +118,6 @@ public class BinderCallsStats { 


    private void processCallEnded(CallSession s, int parcelRequestSize, int parcelReplySize) {

        synchronized (mLock) {

            if (!mEnabled) {

                return;

            }



            final int callingUid = getCallingUid();

            UidEntry uidEntry = mUidEntries.get(callingUid);

            if (uidEntry == null) {
@@ -135,7 +125,7 @@ public class BinderCallsStats { 
                mUidEntries.put(callingUid, uidEntry);

            }

            uidEntry.callCount++;

            CallStat callStat = uidEntry.getOrCreate(s.callStat);

            CallStat callStat = uidEntry.getOrCreate(s.className, s.transactionCode);

            callStat.callCount++;



            // Non-negative time signals we need to record data for this call.
@@ -147,7 +137,7 @@ public class BinderCallsStats { 
                uidEntry.recordedCallCount++;



                callStat.recordedCallCount++;

                callStat.methodName = s.callStat.methodName;

                callStat.methodName = s.methodName;

                callStat.cpuTimeMicros += duration;

                callStat.maxCpuTimeMicros = Math.max(callStat.maxCpuTimeMicros, duration);

                callStat.latencyMicros += latencyDuration;
@@ -164,16 +154,9 @@ 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, Exception exception) {

        Preconditions.checkNotNull(s);

        if (!mEnabled) {

    @Override

    public void callThrewException(@Nullable CallSession s, Exception exception) {

        if (s == null) {

            return;

        }

        s.exceptionThrown = true;
@@ -208,7 +191,7 @@ public class BinderCallsStats { 
                    exported.uid = entry.uid;

                    exported.className = stat.className;

                    exported.methodName = stat.methodName == null

                            ? String.valueOf(stat.msg) : stat.methodName;

                            ? String.valueOf(stat.transactionCode) : stat.methodName;

                    exported.cpuTimeMicros = stat.cpuTimeMicros;

                    exported.maxCpuTimeMicros = stat.maxCpuTimeMicros;

                    exported.latencyMicros = stat.latencyMicros;
@@ -233,11 +216,6 @@ public class BinderCallsStats { 
    }



    private void dumpLocked(PrintWriter pw, Map<Integer,String> appIdToPkgNameMap, boolean verbose) {

        if (!mEnabled) {

            pw.println("Binder calls stats disabled.");

            return;

        }



        long totalCallsCount = 0;

        long totalRecordedCallsCount = 0;

        long totalCpuTime = 0;
@@ -340,10 +318,6 @@ public class BinderCallsStats { 
        return mRandom.nextInt() % mPeriodicSamplingInterval == 0;

    }



    public static BinderCallsStats getInstance() {

        return sInstance;

    }



    public void setDetailedTracking(boolean enabled) {

        synchronized (mLock) {

            if (enabled != mDetailedTracking) {
@@ -353,15 +327,6 @@ public class BinderCallsStats { 
        }

    }



    public void setEnabled(boolean enabled) {

        synchronized (mLock) {

            if (enabled != mEnabled) {

                mEnabled = enabled;

                reset();

            }

        }

    }



    public void setSamplingInterval(int samplingInterval) {

        synchronized (mLock) {

            if (samplingInterval != mPeriodicSamplingInterval) {
@@ -400,7 +365,7 @@ public class BinderCallsStats { 
    @VisibleForTesting

    public static class CallStat {

        public String className;

        public int msg;

        public int transactionCode;

        // Method name might be null when we cannot resolve the transaction code. For instance, if

        // the binder was not generated by AIDL.

        public @Nullable String methodName;
@@ -427,10 +392,21 @@ public class BinderCallsStats { 
        CallStat() {

        }



        CallStat(String className, int msg) {

        CallStat(String className, int transactionCode) {

            this.className = className;

            this.msg = msg;

            this.transactionCode = transactionCode;

        }



        @Override

        public String toString() {

            return className + "#" + (methodName == null ? transactionCode : methodName);

        }

    }



    /** Key used to store CallStat object in a Map. */

    public static class CallStatKey {

        public String className;

        public int transactionCode;



        @Override

        public boolean equals(Object o) {
@@ -438,29 +414,19 @@ public class BinderCallsStats { 
                return true;

            }



            CallStat callStat = (CallStat) o;

            return msg == callStat.msg && (className.equals(callStat.className));

            CallStatKey key = (CallStatKey) o;

            return transactionCode == key.transactionCode

                    && (className.equals(key.className));

        }



        @Override

        public int hashCode() {

            int result = className.hashCode();

            result = 31 * result + msg;

            result = 31 * result + transactionCode;

            return result;

        }



        @Override

        public String toString() {

            return className + "#" + (methodName == null ? msg : methodName);

        }

    }



    public static class CallSession {

        long cpuTimeStarted;

        long timeStarted;

        boolean exceptionThrown;

        final CallStat callStat = new CallStat();

    }



    @VisibleForTesting

    public static class UidEntry {
@@ -480,14 +446,21 @@ public class BinderCallsStats { 
        }



        // Aggregate time spent per each call name: call_desc -> cpu_time_micros

        Map<CallStat, CallStat> mCallStats = new ArrayMap<>();



        CallStat getOrCreate(CallStat callStat) {

            CallStat mapCallStat = mCallStats.get(callStat);

        private Map<CallStatKey, CallStat> mCallStats = new ArrayMap<>();

        private CallStatKey mTempKey = new CallStatKey();



        CallStat getOrCreate(String className, int transactionCode) {

            // Use a global temporary key to avoid creating new objects for every lookup.

            mTempKey.className = className;

            mTempKey.transactionCode = transactionCode;

            CallStat mapCallStat = mCallStats.get(mTempKey);

            // Only create CallStat if it's a new entry, otherwise update existing instance

            if (mapCallStat == null) {

                mapCallStat = new CallStat(callStat.className, callStat.msg);

                mCallStats.put(mapCallStat, mapCallStat);

                mapCallStat = new CallStat(className, transactionCode);

                CallStatKey key = new CallStatKey();

                key.className = className;

                key.transactionCode = transactionCode;

                mCallStats.put(key, mapCallStat);

            }

            return mapCallStat;

        }
@@ -496,7 +469,7 @@ public class BinderCallsStats { 
         * Returns list of calls sorted by CPU time

         */

        public List<CallStat> getCallStatsList() {

            List<CallStat> callStats = new ArrayList<>(mCallStats.keySet());

            List<CallStat> callStats = new ArrayList<>(mCallStats.values());

            callStats.sort((o1, o2) -> {

                if (o1.cpuTimeMicros < o2.cpuTimeMicros) {

                    return 1;

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

+54 −7
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
package com.android.internal.os;



import android.annotation.NonNull;

import android.os.Binder;

import android.os.Handler;

import android.os.IBinder;

import android.os.SystemClock;
@@ -69,6 +70,52 @@ public class BinderInternal { 
        }

    }



    /**

     * A session used by {@link Observer} in order to keep track of some data.

     */

    public static class CallSession {

        // Binder interface descriptor.

        public String className;

        // Binder transaction code.

        public int transactionCode;

        // Binder transaction method name.

        public String methodName;

        // CPU time at the beginning of the call.

        long cpuTimeStarted;

        // System time at the beginning of the call.

        long timeStarted;

        // Should be set to one when an exception is thrown.

        boolean exceptionThrown;

    }



    /**

     * Allows to track various steps of an API call.

     */

    public interface Observer {

        /**

         * Called when a binder call starts.

         *

         * @return a CallSession to pass to the callEnded method.

         */

        CallSession callStarted(Binder binder, int code);



        /**

         * Called when a binder call stops.

         *

         * <li>This method will be called even when an exception is thrown.

         */

        void callEnded(CallSession s, int parcelRequestSize, int parcelReplySize);



        /**

         * 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, Exception exception);

    }



    /**

     * Add the calling thread to the IPC thread pool.  This function does

     * not return until the current process is exiting.

core/tests/coretests/src/com/android/internal/os/BinderCallsStatsTest.java

+31 −52
Original line number Diff line number Diff line
@@ -23,6 +23,8 @@ import android.support.test.runner.AndroidJUnit4; 
import android.util.ArrayMap;

import android.util.SparseArray;



import com.android.internal.os.BinderInternal.CallSession;



import org.junit.Assert;

import org.junit.Test;

import org.junit.runner.RunWith;
@@ -52,7 +54,7 @@ public class BinderCallsStatsTest { 
        bcs.setSamplingInterval(5);



        Binder binder = new Binder();

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        CallSession callSession = bcs.callStarted(binder, 1);

        bcs.time += 10;

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);
@@ -65,7 +67,7 @@ public class BinderCallsStatsTest { 
        assertEquals(1, uidEntry.recordedCallCount);

        assertEquals(10, uidEntry.cpuTimeMicros);

        assertEquals(binder.getClass().getName(), callStatsList.get(0).className);

        assertEquals(1, callStatsList.get(0).msg);

        assertEquals(1, callStatsList.get(0).transactionCode);



        // CPU usage is sampled, should not be tracked here.

        callSession = bcs.callStarted(binder, 1);
@@ -93,7 +95,7 @@ public class BinderCallsStatsTest { 
        bcs.setDetailedTracking(true);



        Binder binder = new Binder();

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        CallSession callSession = bcs.callStarted(binder, 1);

        bcs.time += 10;

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);
@@ -109,7 +111,7 @@ public class BinderCallsStatsTest { 
        assertEquals(1, callStatsList.get(0).callCount);

        assertEquals(10, callStatsList.get(0).cpuTimeMicros);

        assertEquals(binder.getClass().getName(), callStatsList.get(0).className);

        assertEquals(1, callStatsList.get(0).msg);

        assertEquals(1, callStatsList.get(0).transactionCode);



        callSession = bcs.callStarted(binder, 1);

        bcs.time += 20;
@@ -134,44 +136,21 @@ public class BinderCallsStatsTest { 
    }



    @Test

    public void testDisabled() {

        TestBinderCallsStats bcs = new TestBinderCallsStats();

        bcs.setEnabled(false);



        Binder binder = new Binder();

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        bcs.time += 10;

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);



        SparseArray<BinderCallsStats.UidEntry> uidEntries = bcs.getUidEntries();

        assertEquals(0, uidEntries.size());

    }



    @Test

    public void testDisableInBetweenCall() {

    public void testEnableInBetweenCall() {

        TestBinderCallsStats bcs = new TestBinderCallsStats();

        bcs.setEnabled(true);



        Binder binder = new Binder();

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        bcs.time += 10;

        bcs.setEnabled(false);

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);

        bcs.callEnded(null, REQUEST_SIZE, REPLY_SIZE);



        SparseArray<BinderCallsStats.UidEntry> uidEntries = bcs.getUidEntries();

        assertEquals(0, uidEntries.size());

    }



    @Test

    public void testEnableInBetweenCall() {

    public void testInBetweenCallWhenExceptionThrown() {

        TestBinderCallsStats bcs = new TestBinderCallsStats();

        bcs.setEnabled(false);



        Binder binder = new Binder();

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        bcs.time += 10;

        bcs.setEnabled(true);

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);

        bcs.callThrewException(null, new IllegalStateException());

        bcs.callEnded(null, REQUEST_SIZE, REPLY_SIZE);



        SparseArray<BinderCallsStats.UidEntry> uidEntries = bcs.getUidEntries();

        assertEquals(0, uidEntries.size());
@@ -184,7 +163,7 @@ public class BinderCallsStatsTest { 
        bcs.setSamplingInterval(2);



        Binder binder = new Binder();

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        CallSession callSession = bcs.callStarted(binder, 1);

        bcs.time += 10;

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);
@@ -221,7 +200,7 @@ public class BinderCallsStatsTest { 
        bcs.setSamplingInterval(2);



        Binder binder = new Binder();

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        CallSession callSession = bcs.callStarted(binder, 1);

        bcs.time += 10;

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);
@@ -264,13 +243,13 @@ public class BinderCallsStatsTest { 
                return "resolved";

            }

        };

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        CallSession callSession = bcs.callStarted(binder, 1);

        bcs.time += 10;

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);



        List<BinderCallsStats.CallStat> callStatsList =

                bcs.getUidEntries().get(TEST_UID).getCallStatsList();

        assertEquals(1, callStatsList.get(0).msg);

        assertEquals(1, callStatsList.get(0).transactionCode);

        assertEquals("resolved", callStatsList.get(0).methodName);

    }
@@ -279,7 +258,7 @@ public class BinderCallsStatsTest { 
        TestBinderCallsStats bcs = new TestBinderCallsStats();

        bcs.setDetailedTracking(true);

        Binder binder = new Binder();

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        CallSession callSession = bcs.callStarted(binder, 1);

        bcs.time += 10;

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);
@@ -295,7 +274,7 @@ public class BinderCallsStatsTest { 
        TestBinderCallsStats bcs = new TestBinderCallsStats();

        bcs.setDetailedTracking(true);

        Binder binder = new Binder();

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        CallSession callSession = bcs.callStarted(binder, 1);

        bcs.time += 50;

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);
@@ -314,7 +293,7 @@ public class BinderCallsStatsTest { 
        TestBinderCallsStats bcs = new TestBinderCallsStats();

        bcs.setDetailedTracking(true);

        Binder binder = new Binder();

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        CallSession callSession = bcs.callStarted(binder, 1);

        bcs.elapsedTime += 5;

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);
@@ -341,7 +320,7 @@ public class BinderCallsStatsTest { 
        TestBinderCallsStats bcs = new TestBinderCallsStats();

        bcs.setDetailedTracking(true);

        Binder binder = new Binder();

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        CallSession callSession = bcs.callStarted(binder, 1);

        bcs.callThrewException(callSession, new IllegalStateException());

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);
@@ -364,7 +343,7 @@ public class BinderCallsStatsTest { 
        TestBinderCallsStats bcs = new TestBinderCallsStats();

        bcs.setDetailedTracking(true);

        Binder binder = new Binder();

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        CallSession callSession = bcs.callStarted(binder, 1);

        bcs.callThrewException(callSession, new IllegalStateException());

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);
@@ -377,7 +356,7 @@ public class BinderCallsStatsTest { 
        TestBinderCallsStats bcs = new TestBinderCallsStats();

        bcs.setDetailedTracking(false);

        Binder binder = new Binder();

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        CallSession callSession = bcs.callStarted(binder, 1);

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);



        assertEquals(0, bcs.getExportedCallStats().size());
@@ -388,7 +367,7 @@ public class BinderCallsStatsTest { 
        TestBinderCallsStats bcs = new TestBinderCallsStats();

        bcs.setDetailedTracking(true);

        Binder binder = new Binder();

        BinderCallsStats.CallSession callSession = bcs.callStarted(binder, 1);

        CallSession callSession = bcs.callStarted(binder, 1);

        bcs.time += 10;

        bcs.elapsedTime += 20;

        bcs.callEnded(callSession, REQUEST_SIZE, REPLY_SIZE);