[D3D12] Trace guest memory operations

src/xenia/gpu/d3d12/shared_memory.h

@@ -12,9 +12,11 @@
 
 #include <memory>
 #include <mutex>
+#include <utility>
 #include <vector>
 
 #include "xenia/base/mutex.h"
+#include "xenia/gpu/trace_writer.h"
 #include "xenia/memory.h"
 #include "xenia/ui/d3d12/d3d12_api.h"
 #include "xenia/ui/d3d12/pools.h"
@@ -30,7 +32,8 @@ class D3D12CommandProcessor;
 // system page size granularity.
 class SharedMemory {
  public:
-  SharedMemory(D3D12CommandProcessor* command_processor, Memory* memory);
+  SharedMemory(D3D12CommandProcessor* command_processor, Memory* memory,
+               TraceWriter* trace_writer);
   ~SharedMemory();
 
   bool Initialize();
@@ -124,6 +127,10 @@ class SharedMemory {
   void WriteRawSRVDescriptor(D3D12_CPU_DESCRIPTOR_HANDLE handle);
   void WriteRawUAVDescriptor(D3D12_CPU_DESCRIPTOR_HANDLE handle);
 
+  // Returns true if any downloads were submitted to the command processor.
+  bool InitializeTraceSubmitDownloads();
+  void InitializeTraceCompleteDownloads();
+
  private:
   bool AreTiledResourcesUsed() const;
 
@@ -132,8 +139,8 @@ class SharedMemory {
                       bool written_by_gpu);
 
   D3D12CommandProcessor* command_processor_;
-
   Memory* memory_;
+  TraceWriter* trace_writer_;
 
   // The 512 MB tiled buffer.
   static constexpr uint32_t kBufferSizeLog2 = 29;
@@ -268,6 +275,13 @@ class SharedMemory {
   std::unique_ptr<ui::d3d12::UploadBufferPool> upload_buffer_pool_ = nullptr;
 
   void TransitionBuffer(D3D12_RESOURCE_STATES new_state);
+
+  // GPU-written memory downloading for traces.
+  // Start page, length in pages.
+  std::vector<std::pair<uint32_t, uint32_t>> trace_gpu_written_ranges_;
+  // Created temporarily, only for downloading.
+  ID3D12Resource* trace_gpu_written_buffer_ = nullptr;
+  void ResetTraceGPUWrittenBuffer();
 };
 
 }  // namespace d3d12