[Vulkan] Free bind group layouts pending deallocation on shut down

Bug: 1212385
Change-Id: I093f9e5bb91f697939f1fbb286f284b54f3d7c02
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/52521
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jiawei Shao <jiawei.shao@intel.com>
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Auto-Submit: Austin Eng <enga@chromium.org>

src/dawn_native/vulkan/DeviceVk.cpp

@@ -919,10 +919,17 @@ namespace dawn_native { namespace vulkan {
         }
         mUnusedFences.clear();
 
+        ExecutionSerial completedSerial = GetCompletedCommandSerial();
+        for (Ref<BindGroupLayout>& bgl :
+             mBindGroupLayoutsPendingDeallocation.IterateUpTo(completedSerial)) {
+            bgl->FinishDeallocation(completedSerial);
+        }
+        mBindGroupLayoutsPendingDeallocation.ClearUpTo(completedSerial);
+
         // Releasing the uploader enqueues buffers to be released.
         // Call Tick() again to clear them before releasing the deleter.
-        mResourceMemoryAllocator->Tick(GetCompletedCommandSerial());
-        mDeleter->Tick(GetCompletedCommandSerial());
+        mResourceMemoryAllocator->Tick(completedSerial);
+        mDeleter->Tick(completedSerial);
 
         // Allow recycled memory to be deleted.
         mResourceMemoryAllocator->DestroyPool();

src/tests/end2end/DeviceLostTests.cpp

@@ -464,6 +464,42 @@ TEST_P(DeviceLostTest, DeviceLostBeforeCreatePipelineAsyncCallback) {
     SetCallbackAndLoseForTesting();
 }
 
+// This is a regression test for crbug.com/1212385 where Dawn didn't clean up all
+// references to bind group layouts such that the cache was non-empty at the end
+// of shut down.
+TEST_P(DeviceLostTest, FreeBindGroupAfterDeviceLossWithPendingCommands) {
+    wgpu::BindGroupLayout bgl = utils::MakeBindGroupLayout(
+        device, {{0, wgpu::ShaderStage::Fragment, wgpu::BufferBindingType::Storage}});
+
+    wgpu::BufferDescriptor bufferDesc;
+    bufferDesc.size = sizeof(float);
+    bufferDesc.usage = wgpu::BufferUsage::Storage;
+    wgpu::Buffer buffer = device.CreateBuffer(&bufferDesc);
+
+    wgpu::BindGroup bg = utils::MakeBindGroup(device, bgl, {{0, buffer, 0, sizeof(float)}});
+
+    // Advance the pending command serial. We only a need a couple of these to repro the bug,
+    // but include extra so this does not become a change-detecting test if the specific serial
+    // value is sensitive.
+    queue.Submit(0, nullptr);
+    queue.Submit(0, nullptr);
+    queue.Submit(0, nullptr);
+    queue.Submit(0, nullptr);
+    queue.Submit(0, nullptr);
+    queue.Submit(0, nullptr);
+
+    SetCallbackAndLoseForTesting();
+
+    // Releasing the bing group places the bind group layout into a queue in the Vulkan backend
+    // for recycling of descriptor sets. So, after these release calls there is still one last
+    // reference to the BGL which wouldn't be freed until the pending serial passes.
+    // Since the device is lost, destruction will clean up immediately without waiting for the
+    // serial. The implementation needs to be sure to clear these BGL references. At the end of
+    // Device shut down, we ASSERT that the BGL cache is empty.
+    bgl = nullptr;
+    bg = nullptr;
+}
+
 DAWN_INSTANTIATE_TEST(DeviceLostTest,
                       D3D12Backend(),
                       MetalBackend(),