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// 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 CONTENT_CHILD_WEB_PROCESS_MEMORY_DUMP_IMPL_H_
#define CONTENT_CHILD_WEB_PROCESS_MEMORY_DUMP_IMPL_H_
#include "base/containers/scoped_ptr_hash_map.h"
#include "base/gtest_prod_util.h"
#include "base/memory/scoped_ptr.h"
#include "content/common/content_export.h"
#include "third_party/WebKit/public/platform/WebProcessMemoryDump.h"
namespace base {
namespace trace_event {
class MemoryAllocatorDump;
class ProcessMemoryDump;
} // namespace base
} // namespace trace_event
namespace content {
class WebMemoryAllocatorDumpImpl;
// Implements the blink::WebProcessMemoryDump interface by means of proxying the
// calls to createMemoryAllocatorDump() to the underlying
// base::trace_event::ProcessMemoryDump instance.
class CONTENT_EXPORT WebProcessMemoryDumpImpl final
: public NON_EXPORTED_BASE(blink::WebProcessMemoryDump) {
public:
// Creates a standalone WebProcessMemoryDumpImp, which owns the underlying
// ProcessMemoryDump.
WebProcessMemoryDumpImpl();
// Wraps (without owning) an existing ProcessMemoryDump.
explicit WebProcessMemoryDumpImpl(
base::trace_event::ProcessMemoryDump* process_memory_dump);
virtual ~WebProcessMemoryDumpImpl();
// blink::WebProcessMemoryDump implementation.
virtual blink::WebMemoryAllocatorDump* createMemoryAllocatorDump(
const blink::WebString& absolute_name);
virtual blink::WebMemoryAllocatorDump* getMemoryAllocatorDump(
const blink::WebString& absolute_name) const;
virtual void clear();
virtual void takeAllDumpsFrom(blink::WebProcessMemoryDump* other);
const base::trace_event::ProcessMemoryDump* process_memory_dump() const {
return process_memory_dump_;
}
private:
FRIEND_TEST_ALL_PREFIXES(WebProcessMemoryDumpImplTest, IntegrationTest);
// Only for the case of ProcessMemoryDump being owned (i.e. the default ctor).
scoped_ptr<base::trace_event::ProcessMemoryDump> owned_process_memory_dump_;
// The underlying ProcessMemoryDump instance to which the
// createMemoryAllocatorDump() calls will be proxied to.
base::trace_event::ProcessMemoryDump* process_memory_dump_; // Not owned.
// Reverse index of MemoryAllocatorDump -> WebMemoryAllocatorDumpImpl wrapper.
// By design WebMemoryDumpProvider(s) are not supposed to hold the pointer
// to the WebProcessMemoryDump passed as argument of the onMemoryDump() call.
// Those pointers are valid only within the scope of the call and can be
// safely torn down once the WebProcessMemoryDumpImpl itself is destroyed.
base::ScopedPtrHashMap<base::trace_event::MemoryAllocatorDump*,
scoped_ptr<WebMemoryAllocatorDumpImpl>>
memory_allocator_dumps_;
DISALLOW_COPY_AND_ASSIGN(WebProcessMemoryDumpImpl);
};
} // namespace content
#endif // CONTENT_CHILD_WEB_PROCESS_MEMORY_DUMP_IMPL_H_
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