Avoid using stale sessions for cleanup alarm.

Remove old EJ timing sessions before we schedule the next cleanup alarm.
If we don't remove them, then we will continue to use stale sessions as
the basis for the next cleanup alarm, which would eventually result in
scheduling alarms in the past.

Bug: 187351354
Test: atest FrameworksMockingServicesTest:QuotaControllerTest
Change-Id: I1b968e0461efe9aad3e785760a3cd2f5d8d4de8b

apex/jobscheduler/service/java/com/android/server/job/controllers/QuotaController.java

@@ -1493,13 +1493,14 @@ public final class QuotaController extends StateController {
     /** Schedule a cleanup alarm if necessary and there isn't already one scheduled. */
     @VisibleForTesting
     void maybeScheduleCleanupAlarmLocked() {
-        if (mNextCleanupTimeElapsed > sElapsedRealtimeClock.millis()) {
+        final long nowElapsed = sElapsedRealtimeClock.millis();
+        if (mNextCleanupTimeElapsed > nowElapsed) {
             // There's already an alarm scheduled. Just stick with that one. There's no way we'll
             // end up scheduling an earlier alarm.
             if (DEBUG) {
                 Slog.v(TAG, "Not scheduling cleanup since there's already one at "
-                        + mNextCleanupTimeElapsed + " (in " + (mNextCleanupTimeElapsed
-                        - sElapsedRealtimeClock.millis()) + "ms)");
+                        + mNextCleanupTimeElapsed
+                        + " (in " + (mNextCleanupTimeElapsed - nowElapsed) + "ms)");
             }
             return;
         }
@@ -1521,7 +1522,7 @@ public final class QuotaController extends StateController {
         if (nextCleanupElapsed - mNextCleanupTimeElapsed <= 10 * MINUTE_IN_MILLIS) {
             // No need to clean up too often. Delay the alarm if the next cleanup would be too soon
             // after it.
-            nextCleanupElapsed += 10 * MINUTE_IN_MILLIS;
+            nextCleanupElapsed = mNextCleanupTimeElapsed + 10 * MINUTE_IN_MILLIS;
         }
         mNextCleanupTimeElapsed = nextCleanupElapsed;
         mAlarmManager.set(AlarmManager.ELAPSED_REALTIME, nextCleanupElapsed, ALARM_TAG_CLEANUP,
@@ -2462,30 +2463,60 @@ public final class QuotaController extends StateController {
         }
     }
 
-    private final class DeleteTimingSessionsFunctor implements Consumer<List<TimingSession>> {
-        private final Predicate<TimingSession> mTooOld = new Predicate<TimingSession>() {
-            public boolean test(TimingSession ts) {
-                return ts.endTimeElapsed <= sElapsedRealtimeClock.millis() - MAX_PERIOD_MS;
-            }
-        };
+    private static final class TimingSessionTooOldPredicate implements Predicate<TimingSession> {
+        private long mNowElapsed;
+
+        private void updateNow() {
+            mNowElapsed = sElapsedRealtimeClock.millis();
+        }
 
         @Override
-        public void accept(List<TimingSession> sessions) {
-            if (sessions != null) {
-                // Remove everything older than MAX_PERIOD_MS time ago.
-                sessions.removeIf(mTooOld);
-            }
+        public boolean test(TimingSession ts) {
+            return ts.endTimeElapsed <= mNowElapsed - MAX_PERIOD_MS;
         }
     }
 
-    private final DeleteTimingSessionsFunctor mDeleteOldSessionsFunctor =
-            new DeleteTimingSessionsFunctor();
+    private final TimingSessionTooOldPredicate mTimingSessionTooOld =
+            new TimingSessionTooOldPredicate();
+
+    private final Consumer<List<TimingSession>> mDeleteOldSessionsFunctor = sessions -> {
+        if (sessions != null) {
+            // Remove everything older than MAX_PERIOD_MS time ago.
+            sessions.removeIf(mTimingSessionTooOld);
+        }
+    };
 
     @VisibleForTesting
     void deleteObsoleteSessionsLocked() {
+        mTimingSessionTooOld.updateNow();
+
+        // Regular sessions
         mTimingSessions.forEach(mDeleteOldSessionsFunctor);
-        // Don't delete EJ timing sessions here. They'll be removed in
-        // getRemainingEJExecutionTimeLocked().
+
+        // EJ sessions
+        for (int uIdx = 0; uIdx < mEJTimingSessions.numMaps(); ++uIdx) {
+            final int userId = mEJTimingSessions.keyAt(uIdx);
+            for (int pIdx = 0; pIdx < mEJTimingSessions.numElementsForKey(userId); ++pIdx) {
+                final String packageName = mEJTimingSessions.keyAt(uIdx, pIdx);
+                final ShrinkableDebits debits = getEJDebitsLocked(userId, packageName);
+                final List<TimingSession> sessions = mEJTimingSessions.get(userId, packageName);
+                if (sessions == null) {
+                    continue;
+                }
+
+                while (sessions.size() > 0) {
+                    final TimingSession ts = sessions.get(0);
+                    if (mTimingSessionTooOld.test(ts)) {
+                        // Stale sessions may still be factored into tally. Remove them.
+                        final long duration = ts.endTimeElapsed - ts.startTimeElapsed;
+                        debits.transactLocked(-duration);
+                        sessions.remove(0);
+                    } else {
+                        break;
+                    }
+                }
+            }
+        }
     }
 
     private class QcHandler extends Handler {

services/tests/mockingservicestests/src/com/android/server/job/controllers/QuotaControllerTest.java

@@ -68,7 +68,6 @@ import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ApplicationInfo;
-import android.content.pm.IPackageManager;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManagerInternal;
@@ -475,7 +474,6 @@ public class QuotaControllerTest {
         expectedRegular.add(thr);
         expectedRegular.add(two);
         expectedRegular.add(one);
-        expectedEJ.add(fiv); // EJ list should be unaffected
         expectedEJ.add(fou);
         expectedEJ.add(one);
         mQuotaController.saveTimingSession(0, "com.android.test", fiv, false);