Do not hold WM lock while closing animation transaction
Animation transactions can be blocking, leading to total window manager starvation. Fix this by not holding lock. Test: Double tap recents button, make sure it's always responsive Change-Id: I8e09e04f243d2bfc09fb68097846a42e76c7cab5 Fixes: 38192114
This commit is contained in:
Jorim Jaggi
@@ -115,8 +115,8 @@ public class WindowAnimator {
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mAnimationTick = () -> {
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synchronized (mService.mWindowMap) {
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mAnimationTickScheduled = false;
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animateLocked(mCurrentFrameTime);
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}
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animate(mCurrentFrameTime);
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};
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mAnimationFrameCallback = frameTimeNs -> {
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synchronized (mService.mWindowMap) {
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@@ -126,8 +126,8 @@ public class WindowAnimator {
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return;
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}
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mAnimationTickScheduled = true;
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mSfChoreographer.scheduleAtSfVsync(mAnimationTick);
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}
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mSfChoreographer.scheduleAtSfVsync(mAnimationTick);
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};
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}
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@@ -151,142 +151,158 @@ public class WindowAnimator {
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mDisplayContentsAnimators.delete(displayId);
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}
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/** Locked on mService.mWindowMap. */
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private void animateLocked(long frameTimeNs) {
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if (!mInitialized) {
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return;
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}
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mCurrentTime = frameTimeNs / TimeUtils.NANOS_PER_MS;
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mBulkUpdateParams = SET_ORIENTATION_CHANGE_COMPLETE;
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boolean wasAnimating = mAnimating;
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setAnimating(false);
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mAppWindowAnimating = false;
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if (DEBUG_WINDOW_TRACE) {
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Slog.i(TAG, "!!! animate: entry time=" + mCurrentTime);
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}
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if (SHOW_TRANSACTIONS) Slog.i(TAG, ">>> OPEN TRANSACTION animateLocked");
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mService.openSurfaceTransaction();
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SurfaceControl.setAnimationTransaction();
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/**
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* DO NOT HOLD THE WINDOW MANAGER LOCK WHILE CALLING THIS METHOD. Reason: the method closes
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* an animation transaction, that might be blocking until the next sf-vsync, so we want to make
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* sure other threads can make progress if this happens.
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*/
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private void animate(long frameTimeNs) {
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boolean transactionOpen = false;
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boolean wasAnimating = false;
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try {
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final AccessibilityController accessibilityController =
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mService.mAccessibilityController;
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final int numDisplays = mDisplayContentsAnimators.size();
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for (int i = 0; i < numDisplays; i++) {
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final int displayId = mDisplayContentsAnimators.keyAt(i);
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final DisplayContent dc = mService.mRoot.getDisplayContentOrCreate(displayId);
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dc.stepAppWindowsAnimation(mCurrentTime);
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DisplayContentsAnimator displayAnimator = mDisplayContentsAnimators.valueAt(i);
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synchronized (mService.mWindowMap) {
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if (!mInitialized) {
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return;
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}
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final ScreenRotationAnimation screenRotationAnimation =
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displayAnimator.mScreenRotationAnimation;
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if (screenRotationAnimation != null && screenRotationAnimation.isAnimating()) {
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if (screenRotationAnimation.stepAnimationLocked(mCurrentTime)) {
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setAnimating(true);
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} else {
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mBulkUpdateParams |= SET_UPDATE_ROTATION;
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screenRotationAnimation.kill();
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displayAnimator.mScreenRotationAnimation = null;
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mCurrentTime = frameTimeNs / TimeUtils.NANOS_PER_MS;
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mBulkUpdateParams = SET_ORIENTATION_CHANGE_COMPLETE;
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wasAnimating = mAnimating;
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setAnimating(false);
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mAppWindowAnimating = false;
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if (DEBUG_WINDOW_TRACE) {
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Slog.i(TAG, "!!! animate: entry time=" + mCurrentTime);
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}
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//TODO (multidisplay): Accessibility supported only for the default display.
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if (accessibilityController != null && dc.isDefaultDisplay) {
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// We just finished rotation animation which means we did not announce
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// the rotation and waited for it to end, announce now.
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accessibilityController.onRotationChangedLocked(
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mService.getDefaultDisplayContentLocked());
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if (SHOW_TRANSACTIONS) Slog.i(TAG, ">>> OPEN TRANSACTION animate");
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mService.openSurfaceTransaction();
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transactionOpen = true;
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SurfaceControl.setAnimationTransaction();
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final AccessibilityController accessibilityController =
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mService.mAccessibilityController;
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final int numDisplays = mDisplayContentsAnimators.size();
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for (int i = 0; i < numDisplays; i++) {
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final int displayId = mDisplayContentsAnimators.keyAt(i);
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final DisplayContent dc = mService.mRoot.getDisplayContentOrCreate(displayId);
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dc.stepAppWindowsAnimation(mCurrentTime);
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DisplayContentsAnimator displayAnimator = mDisplayContentsAnimators.valueAt(i);
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final ScreenRotationAnimation screenRotationAnimation =
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displayAnimator.mScreenRotationAnimation;
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if (screenRotationAnimation != null && screenRotationAnimation.isAnimating()) {
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if (screenRotationAnimation.stepAnimationLocked(mCurrentTime)) {
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setAnimating(true);
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} else {
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mBulkUpdateParams |= SET_UPDATE_ROTATION;
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screenRotationAnimation.kill();
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displayAnimator.mScreenRotationAnimation = null;
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//TODO (multidisplay): Accessibility supported only for the default
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// display.
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if (accessibilityController != null && dc.isDefaultDisplay) {
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// We just finished rotation animation which means we did not
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// announce the rotation and waited for it to end, announce now.
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accessibilityController.onRotationChangedLocked(
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mService.getDefaultDisplayContentLocked());
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}
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}
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}
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// Update animations of all applications, including those
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// associated with exiting/removed apps
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++mAnimTransactionSequence;
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dc.updateWindowsForAnimator(this);
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dc.updateWallpaperForAnimator(this);
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dc.prepareWindowSurfaces();
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}
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for (int i = 0; i < numDisplays; i++) {
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final int displayId = mDisplayContentsAnimators.keyAt(i);
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final DisplayContent dc = mService.mRoot.getDisplayContentOrCreate(displayId);
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dc.checkAppWindowsReadyToShow();
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final ScreenRotationAnimation screenRotationAnimation =
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mDisplayContentsAnimators.valueAt(i).mScreenRotationAnimation;
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if (screenRotationAnimation != null) {
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screenRotationAnimation.updateSurfacesInTransaction();
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}
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orAnimating(dc.animateDimLayers());
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orAnimating(dc.getDockedDividerController().animate(mCurrentTime));
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//TODO (multidisplay): Magnification is supported only for the default display.
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if (accessibilityController != null && dc.isDefaultDisplay) {
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accessibilityController.drawMagnifiedRegionBorderIfNeededLocked();
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}
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}
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// Update animations of all applications, including those
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// associated with exiting/removed apps
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++mAnimTransactionSequence;
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dc.updateWindowsForAnimator(this);
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dc.updateWallpaperForAnimator(this);
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dc.prepareWindowSurfaces();
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}
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for (int i = 0; i < numDisplays; i++) {
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final int displayId = mDisplayContentsAnimators.keyAt(i);
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final DisplayContent dc = mService.mRoot.getDisplayContentOrCreate(displayId);
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dc.checkAppWindowsReadyToShow();
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final ScreenRotationAnimation screenRotationAnimation =
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mDisplayContentsAnimators.valueAt(i).mScreenRotationAnimation;
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if (screenRotationAnimation != null) {
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screenRotationAnimation.updateSurfacesInTransaction();
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if (mService.mDragState != null) {
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mAnimating |= mService.mDragState.stepAnimationLocked(mCurrentTime);
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}
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orAnimating(dc.animateDimLayers());
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orAnimating(dc.getDockedDividerController().animate(mCurrentTime));
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//TODO (multidisplay): Magnification is supported only for the default display.
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if (accessibilityController != null && dc.isDefaultDisplay) {
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accessibilityController.drawMagnifiedRegionBorderIfNeededLocked();
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if (mAnimating) {
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mService.scheduleAnimationLocked();
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}
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}
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if (mService.mDragState != null) {
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mAnimating |= mService.mDragState.stepAnimationLocked(mCurrentTime);
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}
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if (mAnimating) {
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mService.scheduleAnimationLocked();
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}
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if (mService.mWatermark != null) {
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mService.mWatermark.drawIfNeeded();
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if (mService.mWatermark != null) {
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mService.mWatermark.drawIfNeeded();
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}
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}
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} catch (RuntimeException e) {
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Slog.wtf(TAG, "Unhandled exception in Window Manager", e);
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} finally {
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mService.closeSurfaceTransaction();
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if (SHOW_TRANSACTIONS) Slog.i(TAG, "<<< CLOSE TRANSACTION animateLocked");
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}
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boolean hasPendingLayoutChanges = mService.mRoot.hasPendingLayoutChanges(this);
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boolean doRequest = false;
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if (mBulkUpdateParams != 0) {
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doRequest = mService.mRoot.copyAnimToLayoutParams();
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}
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if (hasPendingLayoutChanges || doRequest) {
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mWindowPlacerLocked.requestTraversal();
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}
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if (mAnimating && !wasAnimating) {
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// Usually app transitions but quite a load onto the system already (with all the things
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// happening in app), so pause task snapshot persisting to not increase the load.
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mService.mTaskSnapshotController.setPersisterPaused(true);
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if (Trace.isTagEnabled(Trace.TRACE_TAG_WINDOW_MANAGER)) {
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Trace.asyncTraceBegin(Trace.TRACE_TAG_WINDOW_MANAGER, "animating", 0);
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if (transactionOpen) {
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mService.closeSurfaceTransaction();
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if (SHOW_TRANSACTIONS) Slog.i(TAG, "<<< CLOSE TRANSACTION animate");
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}
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}
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if (!mAnimating && wasAnimating) {
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mWindowPlacerLocked.requestTraversal();
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mService.mTaskSnapshotController.setPersisterPaused(false);
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if (Trace.isTagEnabled(Trace.TRACE_TAG_WINDOW_MANAGER)) {
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Trace.asyncTraceEnd(Trace.TRACE_TAG_WINDOW_MANAGER, "animating", 0);
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synchronized (mService.mWindowMap) {
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boolean hasPendingLayoutChanges = mService.mRoot.hasPendingLayoutChanges(this);
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boolean doRequest = false;
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if (mBulkUpdateParams != 0) {
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doRequest = mService.mRoot.copyAnimToLayoutParams();
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}
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}
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if (mRemoveReplacedWindows) {
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mService.mRoot.removeReplacedWindows();
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mRemoveReplacedWindows = false;
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}
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if (hasPendingLayoutChanges || doRequest) {
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mWindowPlacerLocked.requestTraversal();
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}
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mService.stopUsingSavedSurfaceLocked();
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mService.destroyPreservedSurfaceLocked();
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mService.mWindowPlacerLocked.destroyPendingSurfaces();
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if (mAnimating && !wasAnimating) {
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if (DEBUG_WINDOW_TRACE) {
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Slog.i(TAG, "!!! animate: exit mAnimating=" + mAnimating
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+ " mBulkUpdateParams=" + Integer.toHexString(mBulkUpdateParams)
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+ " mPendingLayoutChanges(DEFAULT_DISPLAY)="
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+ Integer.toHexString(getPendingLayoutChanges(DEFAULT_DISPLAY)));
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// Usually app transitions but quite a load onto the system already (with all the
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// things happening in app), so pause task snapshot persisting to not increase the
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// load.
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mService.mTaskSnapshotController.setPersisterPaused(true);
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if (Trace.isTagEnabled(Trace.TRACE_TAG_WINDOW_MANAGER)) {
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Trace.asyncTraceBegin(Trace.TRACE_TAG_WINDOW_MANAGER, "animating", 0);
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}
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}
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if (!mAnimating && wasAnimating) {
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mWindowPlacerLocked.requestTraversal();
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mService.mTaskSnapshotController.setPersisterPaused(false);
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if (Trace.isTagEnabled(Trace.TRACE_TAG_WINDOW_MANAGER)) {
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Trace.asyncTraceEnd(Trace.TRACE_TAG_WINDOW_MANAGER, "animating", 0);
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}
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}
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if (mRemoveReplacedWindows) {
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mService.mRoot.removeReplacedWindows();
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mRemoveReplacedWindows = false;
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}
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mService.stopUsingSavedSurfaceLocked();
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mService.destroyPreservedSurfaceLocked();
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mService.mWindowPlacerLocked.destroyPendingSurfaces();
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if (DEBUG_WINDOW_TRACE) {
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Slog.i(TAG, "!!! animate: exit mAnimating=" + mAnimating
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+ " mBulkUpdateParams=" + Integer.toHexString(mBulkUpdateParams)
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+ " mPendingLayoutChanges(DEFAULT_DISPLAY)="
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+ Integer.toHexString(getPendingLayoutChanges(DEFAULT_DISPLAY)));
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}
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}
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}
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Block a user