[sf] Properly update clones of clones
Relanding with the change to only update onscreen mirror
roots and cleaning up some debug logs.
When updating a cloned layer hierarchy that contains
another cloned layer hierarchy, we are dependent on
the order in which we update each hierarchy.
The inner cloned hierarchy must be updated first
otherwise the outer clone will not capture the entire
tree and some layers might be omitted from
composition.
To fix this we track all layer mirror roots. When updating
each root, we check to see if they mirror another root. If
they do mirror another root and that root has not been updated,
we update the root again at the end.
Test: repro steps in bug
Fixes: 279622227
Change-Id: I125f7c788716d59909b77a88ef4098b7cac08919
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 3371ae2..f5bfb31 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -254,7 +254,8 @@
mFlinger->mTunnelModeEnabledReporter->decrementTunnelModeCount();
}
if (mHadClonedChild) {
- mFlinger->mNumClones--;
+ auto& roots = mFlinger->mLayerMirrorRoots;
+ roots.erase(std::remove(roots.begin(), roots.end(), this), roots.end());
}
if (hasTrustedPresentationListener()) {
mFlinger->mNumTrustedPresentationListeners--;
@@ -1649,8 +1650,8 @@
void Layer::dumpOffscreenDebugInfo(std::string& result) const {
std::string hasBuffer = hasBufferOrSidebandStream() ? " (contains buffer)" : "";
- StringAppendF(&result, "Layer %s%s pid:%d uid:%d\n", getName().c_str(), hasBuffer.c_str(),
- mOwnerPid, mOwnerUid);
+ StringAppendF(&result, "Layer %s%s pid:%d uid:%d%s\n", getName().c_str(), hasBuffer.c_str(),
+ mOwnerPid, mOwnerUid, isHandleAlive() ? " handleAlive" : "");
}
void Layer::onDisconnect() {
@@ -2594,7 +2595,7 @@
mDrawingState.inputInfo = tmpInputInfo;
}
-void Layer::updateMirrorInfo() {
+bool Layer::updateMirrorInfo(const std::deque<Layer*>& cloneRootsPendingUpdates) {
if (mClonedChild == nullptr || !mClonedChild->isClonedFromAlive()) {
// If mClonedChild is null, there is nothing to mirror. If isClonedFromAlive returns false,
// it means that there is a clone, but the layer it was cloned from has been destroyed. In
@@ -2602,7 +2603,7 @@
// destroyed. The root, this layer, will still be around since the client can continue
// to hold a reference, but no cloned layers will be displayed.
mClonedChild = nullptr;
- return;
+ return true;
}
std::map<sp<Layer>, sp<Layer>> clonedLayersMap;
@@ -2617,6 +2618,13 @@
mClonedChild->updateClonedDrawingState(clonedLayersMap);
mClonedChild->updateClonedChildren(sp<Layer>::fromExisting(this), clonedLayersMap);
mClonedChild->updateClonedRelatives(clonedLayersMap);
+
+ for (Layer* root : cloneRootsPendingUpdates) {
+ if (clonedLayersMap.find(sp<Layer>::fromExisting(root)) != clonedLayersMap.end()) {
+ return false;
+ }
+ }
+ return true;
}
void Layer::updateClonedDrawingState(std::map<sp<Layer>, sp<Layer>>& clonedLayersMap) {
@@ -2764,7 +2772,7 @@
void Layer::setClonedChild(const sp<Layer>& clonedChild) {
mClonedChild = clonedChild;
mHadClonedChild = true;
- mFlinger->mNumClones++;
+ mFlinger->mLayerMirrorRoots.push_back(this);
}
bool Layer::setDropInputMode(gui::DropInputMode mode) {
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 2640c92..4374914 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -651,7 +651,7 @@
gui::WindowInfo::Type getWindowType() const { return mWindowType; }
- void updateMirrorInfo();
+ bool updateMirrorInfo(const std::deque<Layer*>& cloneRootsPendingUpdates);
/*
* doTransaction - process the transaction. This is a good place to figure
diff --git a/services/surfaceflinger/LayerRenderArea.cpp b/services/surfaceflinger/LayerRenderArea.cpp
index f6b5afc..d606cff 100644
--- a/services/surfaceflinger/LayerRenderArea.cpp
+++ b/services/surfaceflinger/LayerRenderArea.cpp
@@ -85,7 +85,7 @@
// If layer is offscreen, update mirroring info if it exists
if (mLayer->isRemovedFromCurrentState()) {
mLayer->traverse(LayerVector::StateSet::Drawing,
- [&](Layer* layer) { layer->updateMirrorInfo(); });
+ [&](Layer* layer) { layer->updateMirrorInfo({}); });
mLayer->traverse(LayerVector::StateSet::Drawing,
[&](Layer* layer) { layer->updateCloneBufferInfo(); });
}
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index dfe8c72..84ad551 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -4025,8 +4025,24 @@
}
commitOffscreenLayers();
- if (mNumClones > 0) {
- mDrawingState.traverse([&](Layer* layer) { layer->updateMirrorInfo(); });
+ if (mLayerMirrorRoots.size() > 0) {
+ std::deque<Layer*> pendingUpdates;
+ pendingUpdates.insert(pendingUpdates.end(), mLayerMirrorRoots.begin(),
+ mLayerMirrorRoots.end());
+ std::vector<Layer*> needsUpdating;
+ for (Layer* cloneRoot : mLayerMirrorRoots) {
+ pendingUpdates.pop_front();
+ if (cloneRoot->isRemovedFromCurrentState()) {
+ continue;
+ }
+ if (cloneRoot->updateMirrorInfo(pendingUpdates)) {
+ } else {
+ needsUpdating.push_back(cloneRoot);
+ }
+ }
+ for (Layer* cloneRoot : needsUpdating) {
+ cloneRoot->updateMirrorInfo({});
+ }
}
}
@@ -4133,7 +4149,7 @@
mBootStage = BootStage::BOOTANIMATION;
}
- if (mNumClones > 0) {
+ if (mLayerMirrorRoots.size() > 0) {
mDrawingState.traverse([&](Layer* layer) { layer->updateCloneBufferInfo(); });
}
@@ -4158,8 +4174,8 @@
leakingParentLayerFound = true;
sp<Layer> parent = sp<Layer>::fromExisting(layer);
while (parent) {
- ALOGE("Parent Layer: %s handleIsAlive: %s", parent->getName().c_str(),
- std::to_string(parent->isHandleAlive()).c_str());
+ ALOGE("Parent Layer: %s%s", parent->getName().c_str(),
+ (parent->isHandleAlive() ? "handleAlive" : ""));
parent = parent->getParent();
}
// Sample up to 100 layers
@@ -4174,21 +4190,28 @@
}
});
- ALOGE("Dumping random sampling of on-screen layers: ");
+ int numLayers = 0;
+ mDrawingState.traverse([&](Layer* layer) { numLayers++; });
+
+ ALOGE("Dumping random sampling of on-screen layers total(%u):", numLayers);
mDrawingState.traverse([&](Layer* layer) {
// Aim to dump about 200 layers to avoid totally trashing
// logcat. On the other hand, if there really are 4096 layers
// something has gone totally wrong its probably the most
// useful information in logcat.
if (rand() % 20 == 13) {
- ALOGE("Layer: %s", layer->getName().c_str());
+ ALOGE("Layer: %s%s", layer->getName().c_str(),
+ (layer->isHandleAlive() ? "handleAlive" : ""));
+ std::this_thread::sleep_for(std::chrono::milliseconds(5));
}
});
ALOGE("Dumping random sampling of off-screen layers total(%zu): ",
mOffscreenLayers.size());
for (Layer* offscreenLayer : mOffscreenLayers) {
if (rand() % 20 == 13) {
- ALOGE("Offscreen-layer: %s", offscreenLayer->getName().c_str());
+ ALOGE("Offscreen-layer: %s%s", offscreenLayer->getName().c_str(),
+ (offscreenLayer->isHandleAlive() ? "handleAlive" : ""));
+ std::this_thread::sleep_for(std::chrono::milliseconds(5));
}
}
}));
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index d92ec7a..cfaa221 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -296,8 +296,7 @@
// the client can no longer modify this layer directly.
void onHandleDestroyed(BBinder* handle, sp<Layer>& layer, uint32_t layerId);
- // TODO: Remove atomic if move dtor to main thread CL lands
- std::atomic<uint32_t> mNumClones;
+ std::vector<Layer*> mLayerMirrorRoots;
TransactionCallbackInvoker& getTransactionCallbackInvoker() {
return mTransactionCallbackInvoker;