Fix ActivityEmbedding crash when process died

1. When the organizer is removed, also remove any pending event.
2. Only apply transaction when the organizer is registered.

Fix: 240628043
Test: testApplyTransaction_skipTransactionForUnregisterOrganizer
Change-Id: I24c25691fd49fd83100b7ae51ff7fbfeb39a03e9

services/core/java/com/android/server/wm/TaskFragment.java

@@ -393,6 +393,10 @@ class TaskFragment extends WindowContainer<WindowContainer> {
         mTaskFragmentOrganizerProcessName = processName;
     }
 
+    void onTaskFragmentOrganizerRemoved() {
+        mTaskFragmentOrganizer = null;
+    }
+
     /** Whether this TaskFragment is organized by the given {@code organizer}. */
     boolean hasTaskFragmentOrganizer(ITaskFragmentOrganizer organizer) {
         return organizer != null && mTaskFragmentOrganizer != null

services/core/java/com/android/server/wm/TaskFragmentOrganizerController.java

@@ -136,6 +136,9 @@ public class TaskFragmentOrganizerController extends ITaskFragmentOrganizerContr
         void dispose() {
             while (!mOrganizedTaskFragments.isEmpty()) {
                 final TaskFragment taskFragment = mOrganizedTaskFragments.get(0);
+                // Cleanup before remove to prevent it from sending any additional event, such as
+                // #onTaskFragmentVanished, to the removed organizer.
+                taskFragment.onTaskFragmentOrganizerRemoved();
                 taskFragment.removeImmediately();
                 mOrganizedTaskFragments.remove(taskFragment);
             }
@@ -512,10 +515,21 @@ public class TaskFragmentOrganizerController extends ITaskFragmentOrganizerContr
         mPendingTaskFragmentEvents.add(pendingEvent);
     }
 
+    boolean isOrganizerRegistered(ITaskFragmentOrganizer organizer) {
+        return mTaskFragmentOrganizerState.containsKey(organizer.asBinder());
+    }
+
     private void removeOrganizer(ITaskFragmentOrganizer organizer) {
         final TaskFragmentOrganizerState state = validateAndGetState(organizer);
         // remove all of the children of the organized TaskFragment
         state.dispose();
+        // Remove any pending event of this organizer.
+        for (int i = mPendingTaskFragmentEvents.size() - 1; i >= 0; i--) {
+            final PendingTaskFragmentEvent event = mPendingTaskFragmentEvents.get(i);
+            if (event.mTaskFragmentOrg.asBinder().equals(organizer.asBinder())) {
+                mPendingTaskFragmentEvents.remove(i);
+            }
+        }
         mTaskFragmentOrganizerState.remove(organizer.asBinder());
     }
 

services/core/java/com/android/server/wm/WindowOrganizerController.java

@@ -386,6 +386,12 @@ class WindowOrganizerController extends IWindowOrganizerController.Stub
     private void applyTransaction(@NonNull WindowContainerTransaction t, int syncId,
             @Nullable Transition transition, @NonNull CallerInfo caller,
             @Nullable Transition finishTransition) {
+        if (t.getTaskFragmentOrganizer() != null && !mTaskFragmentOrganizerController
+                .isOrganizerRegistered(t.getTaskFragmentOrganizer())) {
+            Slog.e(TAG, "Caller organizer=" + t.getTaskFragmentOrganizer()
+                    + " is no longer registered");
+            return;
+        }
         int effects = 0;
         ProtoLog.v(WM_DEBUG_WINDOW_ORGANIZER, "Apply window transaction, syncId=%d", syncId);
         mService.deferWindowLayout();

services/tests/wmtests/src/com/android/server/wm/TaskFragmentOrganizerControllerTest.java

@@ -420,6 +420,7 @@ public class TaskFragmentOrganizerControllerTest extends WindowTestsBase {
     @Test
     public void testApplyTransaction_enforceHierarchyChange_setAdjacentRoots()
             throws RemoteException {
+        mAtm.mTaskFragmentOrganizerController.registerOrganizer(mIOrganizer);
         final TaskFragment taskFragment2 =
                 new TaskFragment(mAtm, new Binder(), true /* createdByOrganizer */);
         final WindowContainerToken token2 = taskFragment2.mRemoteToken.toWindowContainerToken();
@@ -594,6 +595,25 @@ public class TaskFragmentOrganizerControllerTest extends WindowTestsBase {
         assertEquals(activity0, mDisplayContent.mFocusedApp);
     }
 
+    @Test
+    public void testApplyTransaction_skipTransactionForUnregisterOrganizer() {
+        final ActivityRecord ownerActivity = createActivityRecord(mDisplayContent);
+        final IBinder fragmentToken = new Binder();
+
+        // Allow organizer to create TaskFragment and start/reparent activity to TaskFragment.
+        createTaskFragmentFromOrganizer(mTransaction, ownerActivity, fragmentToken);
+        mAtm.mWindowOrganizerController.applyTransaction(mTransaction);
+
+        // Nothing should happen as the organizer is not registered.
+        assertNull(mAtm.mWindowOrganizerController.getTaskFragment(fragmentToken));
+
+        mController.registerOrganizer(mIOrganizer);
+        mAtm.mWindowOrganizerController.applyTransaction(mTransaction);
+
+        // Successfully created when the organizer is registered.
+        assertNotNull(mAtm.mWindowOrganizerController.getTaskFragment(fragmentToken));
+    }
+
     @Test
     public void testTaskFragmentInPip_startActivityInTaskFragment() {
         setupTaskFragmentInPip();