1 files changed, 98 insertions, 0 deletions
diff --git a/chromium/v8/tools/v8windbg/src/js-stack.h b/chromium/v8/tools/v8windbg/src/js-stack.h
new file mode 100644
index 00000000000..cc6b11b34b3
--- /dev/null
+++ b/chromium/v8/tools/v8windbg/src/js-stack.h
@@ -0,0 +1,98 @@
+// Copyright 2021 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_TOOLS_V8WINDBG_SRC_JS_STACK_H_
+#define V8_TOOLS_V8WINDBG_SRC_JS_STACK_H_
+
+#include <crtdbg.h>
+#include <wrl/implements.h>
+
+#include <string>
+#include <vector>
+
+#include "src/base/optional.h"
+#include "tools/v8windbg/base/utilities.h"
+#include "tools/v8windbg/src/v8-debug-helper-interop.h"
+#include "tools/v8windbg/src/v8windbg-extension.h"
+
+class JSStackAlias
+    : public WRL::RuntimeClass<
+          WRL::RuntimeClassFlags<WRL::RuntimeClassType::ClassicCom>,
+          IModelMethod> {
+ public:
+  IFACEMETHOD(Call)
+  (IModelObject* p_context_object, ULONG64 arg_count,
+   _In_reads_(arg_count) IModelObject** pp_arguments, IModelObject** pp_result,
+   IKeyStore** pp_metadata);
+};
+
+struct FrameData {
+  FrameData();
+  ~FrameData();
+  FrameData(const FrameData&);
+  FrameData(FrameData&&);
+  FrameData& operator=(const FrameData&);
+  FrameData& operator=(FrameData&&);
+  WRL::ComPtr<IModelObject> script_name;
+  WRL::ComPtr<IModelObject> script_source;
+  WRL::ComPtr<IModelObject> function_name;
+  WRL::ComPtr<IModelObject> function_character_offset;
+};
+
+class StackFrameIterator
+    : public WRL::RuntimeClass<
+          WRL::RuntimeClassFlags<WRL::RuntimeClassType::ClassicCom>,
+          IModelIterator> {
+ public:
+  StackFrameIterator(WRL::ComPtr<IDebugHostContext>& host_context);
+  ~StackFrameIterator() override;
+
+  HRESULT PopulateFrameData();
+
+  IFACEMETHOD(Reset)();
+
+  IFACEMETHOD(GetNext)
+  (IModelObject** object, ULONG64 dimensions, IModelObject** indexers,
+   IKeyStore** metadata);
+
+  HRESULT GetAt(uint64_t index, IModelObject** result) const;
+
+ private:
+  ULONG position_ = 0;
+  std::vector<FrameData> frames_;
+  WRL::ComPtr<IDebugHostContext> sp_ctx_;
+};
+
+class StackFrames
+    : public WRL::RuntimeClass<
+          WRL::RuntimeClassFlags<WRL::RuntimeClassType::ClassicCom>,
+          IIndexableConcept, IIterableConcept> {
+ public:
+  StackFrames();
+  ~StackFrames() override;
+
+  // IIndexableConcept members
+  IFACEMETHOD(GetDimensionality)
+  (IModelObject* context_object, ULONG64* dimensionality);
+
+  IFACEMETHOD(GetAt)
+  (IModelObject* context_object, ULONG64 indexer_count, IModelObject** indexers,
+   IModelObject** object, IKeyStore** metadata);
+
+  IFACEMETHOD(SetAt)
+  (IModelObject* context_object, ULONG64 indexer_count, IModelObject** indexers,
+   IModelObject* value);
+
+  // IIterableConcept
+  IFACEMETHOD(GetDefaultIndexDimensionality)
+  (IModelObject* context_object, ULONG64* dimensionality);
+
+  IFACEMETHOD(GetIterator)
+  (IModelObject* context_object, IModelIterator** iterator);
+
+ private:
+  WRL::ComPtr<StackFrameIterator> opt_frames_;
+};
+
+#endif  // V8_TOOLS_V8WINDBG_SRC_JS_STACK_H_