content/child/web_process_memory_dump_impl.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_CHILD_WEB_PROCESS_MEMORY_DUMP_IMPL_H_
   6 #define CONTENT_CHILD_WEB_PROCESS_MEMORY_DUMP_IMPL_H_
   7
   8 #include "base/memory/scoped_vector.h"
   9 #include "third_party/WebKit/public/platform/WebProcessMemoryDump.h"
  10
  11 namespace base {
  12 namespace trace_event {
  13 class ProcessMemoryDump;
  14 }  // namespace base
  15 }  // namespace trace_event
  16
  17 namespace content {
  18
  19 class WebMemoryAllocatorDumpImpl;
  20
  21 // Implements the blink::WebProcessMemoryDump interface by means of proxying the
  22 // calls to createMemoryAllocatorDump() to the underlying
  23 // base::trace_event::ProcessMemoryDump instance.
  24 class WebProcessMemoryDumpImpl : public blink::WebProcessMemoryDump {
  25  public:
  26   explicit WebProcessMemoryDumpImpl(
  27       base::trace_event::ProcessMemoryDump* process_memory_dump);
  28   virtual ~WebProcessMemoryDumpImpl();
  29
  30   // blink::WebProcessMemoryDump implementation.
  31   virtual blink::WebMemoryAllocatorDump* createMemoryAllocatorDump(
  32       const blink::WebString& absolute_name);
  33
  34  private:
  35   // The underlying ProcessMemoryDump instance to which the
  36   // createMemoryAllocatorDump() calls will be proxied to.
  37   base::trace_event::ProcessMemoryDump* process_memory_dump_;  // Not owned.
  38
  39   // By design WebMemoryDumpProvider(s) are not supposed to hold the pointer
  40   // to the WebProcessMemoryDump passed as argument of the onMemoryDump() call.
  41   // Those pointers are valid only within the scope of the call and can be
  42   // safely torn down once the WebProcessMemoryDumpImpl itself is destroyed.
  43   ScopedVector<WebMemoryAllocatorDumpImpl> memory_allocator_dumps_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(WebProcessMemoryDumpImpl);
  46 };
  47
  48 }  // namespace content
  49
  50 #endif  // CONTENT_CHILD_WEB_PROCESS_MEMORY_DUMP_IMPL_H_