[sf] Switch layer trace generator to use the new sf front end
Previously we used a mocked up flinger to playback the transactions
and then generate the layers trace. This was prone to data races
since layers were added on binder thread and transactions were
committed on the main thread. This would lead to invalid data
being generated or crashes.
This cl modifies the transaction traces to capture state changes
in the main thread and uses the new front end logic to generate
the layer snapshots. New front end has no dependencies to the rest
of surfaceflinger and will be more robust in recreating layer
snapshots .
Test: presubmit
Test: capture layers and transaction traces
Fixes: 255901752
Change-Id: I416bff27c90eae1ab8383cbfff4403b0e93c1006
diff --git a/services/surfaceflinger/FrontEnd/Update.h b/services/surfaceflinger/FrontEnd/Update.h
new file mode 100644
index 0000000..e1449b6
--- /dev/null
+++ b/services/surfaceflinger/FrontEnd/Update.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <gui/DisplayInfo.h>
+
+#include "FrontEnd/LayerCreationArgs.h"
+#include "RequestedLayerState.h"
+#include "TransactionState.h"
+
+namespace android {
+struct LayerCreatedState {
+ LayerCreatedState(const wp<Layer>& layer, const wp<Layer>& parent, bool addToRoot)
+ : layer(layer), initialParent(parent), addToRoot(addToRoot) {}
+ wp<Layer> layer;
+ // Indicates the initial parent of the created layer, only used for creating layer in
+ // SurfaceFlinger. If nullptr, it may add the created layer into the current root layers.
+ wp<Layer> initialParent;
+ // Indicates whether the layer getting created should be added at root if there's no parent
+ // and has permission ACCESS_SURFACE_FLINGER. If set to false and no parent, the layer will
+ // be added offscreen.
+ bool addToRoot;
+};
+} // namespace android
+
+namespace android::surfaceflinger::frontend {
+
+// Atomic set of changes affecting layer state. These changes are queued in binder threads and
+// applied every vsync.
+struct Update {
+ std::vector<TransactionState> transactions;
+ std::vector<LayerCreatedState> layerCreatedStates;
+ std::vector<std::unique_ptr<frontend::RequestedLayerState>> newLayers;
+ std::vector<LayerCreationArgs> layerCreationArgs;
+ std::vector<uint32_t> destroyedHandles;
+};
+
+} // namespace android::surfaceflinger::frontend