commit 17035b0211a3c9d45ea46a99217a6acbe76e8fbe
author John Reck <jreck@google.com> Wed Sep 03 07:39:53 2014 -0700
committer John Reck <jreck@google.com> Wed Sep 03 11:13:53 2014 -0700
tree 0dc5117cec7ace03afc6dc817d9865752c6116f0
parent 6e31e0f3d1ca8579e75ee1cfe4ac7c30c525f946

Have destroy call freePrefetchedLayers

 Bug: 17208461

 There's a potential race condition between HardwareRenderer.destroy()
 being called (which calls destroyCanvasAndSurface()) and the renderer
 being finalized (which is what calls freePrefetchedLayers), during which
 time it's possible we get a TRIM_MEMORY_COMPLETE and destroy the EGL
 context.

 Fix this race condition by moving stopDrawing() and freePrefetchedLayers()
 into destroyCanvasAndSurface() where they should have been in the first
 place.

 Also, if we hit the assertion failure, dump the current state of
 Caches to try and provide more context for the failure.

Change-Id: Ife0ba3562041e8b08e87e3e13640472b3004eed6

libs/hwui/renderthread/CanvasContext.cpp

diff --git a/libs/hwui/renderthread/CanvasContext.cpp b/libs/hwui/renderthread/CanvasContext.cpp
index 0a17e132..967cb6f 100644
--- a/libs/hwui/renderthread/CanvasContext.cpp
+++ b/libs/hwui/renderthread/CanvasContext.cpp
@@ -51,13 +51,14 @@
 }
 
 CanvasContext::~CanvasContext() {
-    destroyCanvasAndSurface();
-    mRenderThread.removeFrameCallback(this);
+    destroy();
     delete mAnimationContext;
-    freePrefetechedLayers();
 }
 
-void CanvasContext::destroyCanvasAndSurface() {
+void CanvasContext::destroy() {
+    stopDrawing();
+    freePrefetechedLayers();
+    destroyHardwareResources();
     if (mCanvas) {
         delete mCanvas;
         mCanvas = 0;

libs/hwui/renderthread/CanvasContext.h

diff --git a/libs/hwui/renderthread/CanvasContext.h b/libs/hwui/renderthread/CanvasContext.h
index 7c27190..5984fd0 100644
--- a/libs/hwui/renderthread/CanvasContext.h
+++ b/libs/hwui/renderthread/CanvasContext.h
@@ -66,7 +66,7 @@
     void processLayerUpdate(DeferredLayerUpdater* layerUpdater);
     void prepareTree(TreeInfo& info);
     void draw();
-    void destroyCanvasAndSurface();
+    void destroy();
 
     // IFrameCallback, Chroreographer-driven frame callback entry point
     virtual void doFrame();

libs/hwui/renderthread/RenderProxy.cpp

diff --git a/libs/hwui/renderthread/RenderProxy.cpp b/libs/hwui/renderthread/RenderProxy.cpp
index 3d04316..9528874 100644
--- a/libs/hwui/renderthread/RenderProxy.cpp
+++ b/libs/hwui/renderthread/RenderProxy.cpp
@@ -194,13 +194,13 @@
     return mDrawFrameTask.drawFrame(frameTimeNanos, recordDurationNanos);
 }
 
-CREATE_BRIDGE1(destroyCanvasAndSurface, CanvasContext* context) {
-    args->context->destroyCanvasAndSurface();
+CREATE_BRIDGE1(destroy, CanvasContext* context) {
+    args->context->destroy();
     return NULL;
 }
 
-void RenderProxy::destroyCanvasAndSurface() {
-    SETUP_TASK(destroyCanvasAndSurface);
+void RenderProxy::destroy() {
+    SETUP_TASK(destroy);
     args->context = mContext;
     // destroyCanvasAndSurface() needs a fence as when it returns the
     // underlying BufferQueue is going to be released from under

libs/hwui/renderthread/RenderProxy.h

diff --git a/libs/hwui/renderthread/RenderProxy.h b/libs/hwui/renderthread/RenderProxy.h
index 9e6bcf5..8b8d99c 100644
--- a/libs/hwui/renderthread/RenderProxy.h
+++ b/libs/hwui/renderthread/RenderProxy.h
@@ -73,7 +73,7 @@
     ANDROID_API void setOpaque(bool opaque);
     ANDROID_API int syncAndDrawFrame(nsecs_t frameTimeNanos, nsecs_t recordDurationNanos,
             float density);
-    ANDROID_API void destroyCanvasAndSurface();
+    ANDROID_API void destroy();
 
     ANDROID_API static void invokeFunctor(Functor* functor, bool waitForCompletion);