Hook memory tracing into Windows heap shim.

base/trace_event/winheap_dump_provider_win.h

-// Copyright 2015 The Chromium 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 BASE_TRACE_EVENT_WINHEAP_DUMP_PROVIDER_WIN_H_
-#define BASE_TRACE_EVENT_WINHEAP_DUMP_PROVIDER_WIN_H_
-
-#include <stddef.h>
-
-#include <set>
-
-#include "base/macros.h"
-#include "base/memory/singleton.h"
-#include "base/trace_event/memory_dump_provider.h"
-
-namespace base {
-namespace trace_event {
-
-// A structure containing some information about a given heap.
-struct WinHeapInfo {
-  HANDLE heap_id;
-  size_t committed_size;
-  size_t allocated_size;
-  size_t block_count;
-};
-
-// Dump provider which collects process-wide heap memory stats. This provider
-// iterates over all the heaps of the current process to gather some metrics
-// about them.
-class BASE_EXPORT WinHeapDumpProvider : public MemoryDumpProvider {
- public:
-  // Name of the allocated_objects dump. Use this to declare suballocator dumps
-  // from other dump providers.
-  static const char kAllocatedObjects[];
-
-  static WinHeapDumpProvider* GetInstance();
-
-  // MemoryDumpProvider implementation.
-  bool OnMemoryDump(const MemoryDumpArgs& args,
-                    ProcessMemoryDump* pmd) override;
-
- private:
-  friend struct DefaultSingletonTraits<WinHeapDumpProvider>;
-
-  // Retrieves the information about given heap. The |heap_info| should contain
-  // a valid handle to an existing heap. The blocks contained in the
-  // |block_to_skip| set will be ignored.
-  bool GetHeapInformation(WinHeapInfo* heap_info,
-                          const std::set<void*>& block_to_skip);
-
-  WinHeapDumpProvider() {}
-  ~WinHeapDumpProvider() override {}
-
-  DISALLOW_COPY_AND_ASSIGN(WinHeapDumpProvider);
-};
-
-}  // namespace trace_event
-}  // namespace base
-
-#endif  // BASE_TRACE_EVENT_WINHEAP_DUMP_PROVIDER_WIN_H_