Don't send transitions to Shell until finished booting

While booting, the display isn't enabled yet so transition
animations aren't visible. Additionally, there can be
problems during this time because not all parts of the
system are fully initialized yet causing animations to not
run properly and potentially trigger ANRs.

This CL "localizes" all transitions that start during the
boot phase. This should be faster and prevents coupling
WM and Shell processes while the system is already very
busy.

Bug: 267439165
Test: SystemAppCheck#system_app_crash
Change-Id: If6625e57fcd2246835eaa5dc0155465631e8019c

data/etc/services.core.protolog.json

@@ -61,6 +61,12 @@
       "group": "WM_DEBUG_APP_TRANSITIONS",
       "at": "com\/android\/server\/wm\/WindowToken.java"
     },
+    "-2088209279": {
+      "message": "Notified TransitionController that the display is ready.",
+      "level": "VERBOSE",
+      "group": "WM_DEBUG_WINDOW_TRANSITIONS",
+      "at": "com\/android\/server\/wm\/WindowManagerService.java"
+    },
     "-2072089308": {
       "message": "Attempted to add window with token that is a sub-window: %s.  Aborting.",
       "level": "WARN",
@@ -2767,6 +2773,12 @@
       "group": "WM_DEBUG_STATES",
       "at": "com\/android\/server\/wm\/TaskFragment.java"
     },
+    "378890013": {
+      "message": "Apply and finish immediately because player is disabled for transition #%d .",
+      "level": "VERBOSE",
+      "group": "WM_DEBUG_WINDOW_TRANSITIONS",
+      "at": "com\/android\/server\/wm\/Transition.java"
+    },
     "385237117": {
       "message": "moveFocusableActivityToTop: already on top and focused, activity=%s",
       "level": "DEBUG",
@@ -3649,6 +3661,12 @@
       "group": "WM_DEBUG_STATES",
       "at": "com\/android\/server\/wm\/ActivityRecord.java"
     },
+    "1282992082": {
+      "message": "Disabling player for transition #%d because display isn't enabled yet",
+      "level": "VERBOSE",
+      "group": "WM_DEBUG_WINDOW_TRANSITIONS",
+      "at": "com\/android\/server\/wm\/TransitionController.java"
+    },
     "1284122013": {
       "message": "TaskFragment appeared name=%s",
       "level": "VERBOSE",

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

@@ -216,6 +216,12 @@ class Transition implements BLASTSyncEngine.TransactionReadyListener {
 
     final TransitionController.Logger mLogger = new TransitionController.Logger();
 
+    /**
+     * {@code false} if this transition runs purely in WMCore (meaning Shell is completely unaware
+     * of it). Currently, this happens before the display is ready since nothing can be seen yet.
+     */
+    boolean mIsPlayerEnabled = true;
+
     Transition(@TransitionType int type, @TransitionFlags int flags,
             TransitionController controller, BLASTSyncEngine syncEngine) {
         mType = type;
@@ -766,7 +772,7 @@ class Transition implements BLASTSyncEngine.TransactionReadyListener {
      * be called directly; use {@link TransitionController#finishTransition} instead.
      */
     void finishTransition() {
-        if (Trace.isTagEnabled(TRACE_TAG_WINDOW_MANAGER)) {
+        if (Trace.isTagEnabled(TRACE_TAG_WINDOW_MANAGER) && mIsPlayerEnabled) {
             Trace.asyncTraceEnd(TRACE_TAG_WINDOW_MANAGER, TRACE_NAME_PLAY_TRANSITION,
                     System.identityHashCode(this));
         }
@@ -1096,7 +1102,7 @@ class Transition implements BLASTSyncEngine.TransactionReadyListener {
             controller.setupStartTransaction(transaction);
         }
         buildFinishTransaction(mFinishTransaction, info.getRootLeash());
-        if (mController.getTransitionPlayer() != null) {
+        if (mController.getTransitionPlayer() != null && mIsPlayerEnabled) {
             mController.dispatchLegacyAppTransitionStarting(info, mStatusBarTransitionDelay);
             try {
                 ProtoLog.v(ProtoLogGroup.WM_DEBUG_WINDOW_TRANSITIONS,
@@ -1112,11 +1118,16 @@ class Transition implements BLASTSyncEngine.TransactionReadyListener {
             } catch (RemoteException e) {
                 // If there's an exception when trying to send the mergedTransaction to the
                 // client, we should finish and apply it here so the transactions aren't lost.
-                cleanUpOnFailure();
+                postCleanupOnFailure();
             }
         } else {
-            // No player registered, so just finish/apply immediately
-            cleanUpOnFailure();
+            // No player registered or it's not enabled, so just finish/apply immediately
+            if (!mIsPlayerEnabled) {
+                mLogger.mSendTimeNs = SystemClock.uptimeNanos();
+                ProtoLog.v(ProtoLogGroup.WM_DEBUG_WINDOW_TRANSITIONS, "Apply and finish immediately"
+                        + " because player is disabled for transition #%d .", mSyncId);
+            }
+            postCleanupOnFailure();
         }
         mController.mLoggerHandler.post(mLogger::logOnSend);
         mOverrideOptions = null;
@@ -1127,6 +1138,14 @@ class Transition implements BLASTSyncEngine.TransactionReadyListener {
         info.releaseAnimSurfaces();
     }
 
+    private void postCleanupOnFailure() {
+        mController.mAtm.mH.post(() -> {
+            synchronized (mController.mAtm.mGlobalLock) {
+                cleanUpOnFailure();
+            }
+        });
+    }
+
     /**
      * If the remote failed for any reason, use this to do any appropriate clean-up. Do not call
      * this directly, it's designed to by called by {@link TransitionController} only.

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

@@ -126,6 +126,13 @@ class TransitionController {
 
     final Handler mLoggerHandler = FgThread.getHandler();
 
+    /**
+     * {@code true} While this waits for the display to become enabled (during boot). While waiting
+     * for the display, all core-initiated transitions will be "local".
+     * Note: This defaults to false so that it doesn't interfere with unit tests.
+     */
+    boolean mIsWaitingForDisplayEnabled = false;
+
     TransitionController(ActivityTaskManagerService atm,
             TaskSnapshotController taskSnapshotController,
             TransitionTracer transitionTracer) {
@@ -460,6 +467,15 @@ class TransitionController {
     Transition requestStartTransition(@NonNull Transition transition, @Nullable Task startTask,
             @Nullable RemoteTransition remoteTransition,
             @Nullable TransitionRequestInfo.DisplayChange displayChange) {
+        if (mIsWaitingForDisplayEnabled) {
+            ProtoLog.v(ProtoLogGroup.WM_DEBUG_WINDOW_TRANSITIONS, "Disabling player for transition"
+                    + " #%d because display isn't enabled yet", transition.getSyncId());
+            transition.mIsPlayerEnabled = false;
+            transition.mLogger.mRequestTimeNs = SystemClock.uptimeNanos();
+            mAtm.mH.post(() -> mAtm.mWindowOrganizerController.startTransition(
+                    transition.getToken(), null));
+            return transition;
+        }
         try {
             ProtoLog.v(ProtoLogGroup.WM_DEBUG_WINDOW_TRANSITIONS,
                     "Requesting StartTransition: %s", transition);

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

@@ -310,6 +310,7 @@ import com.android.internal.policy.IKeyguardDismissCallback;
 import com.android.internal.policy.IKeyguardLockedStateListener;
 import com.android.internal.policy.IShortcutService;
 import com.android.internal.policy.KeyInterceptionInfo;
+import com.android.internal.protolog.ProtoLogGroup;
 import com.android.internal.protolog.ProtoLogImpl;
 import com.android.internal.protolog.common.ProtoLog;
 import com.android.internal.util.DumpUtils;
@@ -3776,6 +3777,12 @@ public class WindowManagerService extends IWindowManager.Stub
 
         // Make sure the last requested orientation has been applied.
         updateRotationUnchecked(false, false);
+
+        synchronized (mGlobalLock) {
+            mAtmService.getTransitionController().mIsWaitingForDisplayEnabled = false;
+            ProtoLog.v(ProtoLogGroup.WM_DEBUG_WINDOW_TRANSITIONS, "Notified TransitionController "
+                    + "that the display is ready.");
+        }
     }
 
     private boolean checkBootAnimationCompleteLocked() {

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

@@ -168,6 +168,7 @@ class WindowOrganizerController extends IWindowOrganizerController.Stub
     void setWindowManager(WindowManagerService wms) {
         mTransitionController = new TransitionController(mService, wms.mTaskSnapshotController,
                 wms.mTransitionTracer);
+        mTransitionController.mIsWaitingForDisplayEnabled = !wms.mDisplayEnabled;
         mTransitionController.registerLegacyListener(wms.mActivityManagerAppTransitionNotifier);
     }
 

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

@@ -352,6 +352,7 @@ public class SystemServicesTestRule implements TestRule {
         mAtmService.setWindowManager(mWmService);
         mWmService.mDisplayEnabled = true;
         mWmService.mDisplayReady = true;
+        mAtmService.getTransitionController().mIsWaitingForDisplayEnabled = false;
         // Set configuration for default display
         mWmService.getDefaultDisplayContentLocked().reconfigureDisplayLocked();