1 // Copyright 2016 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 BASE_TRACE_EVENT_HEAP_PROFILER_EVENT_FILTER_H_
6 #define BASE_TRACE_EVENT_HEAP_PROFILER_EVENT_FILTER_H_
7 
8 #include "base/base_export.h"
9 #include "base/macros.h"
10 #include "base/trace_event/trace_event_filter.h"
11 
12 namespace base {
13 namespace trace_event {
14 
15 class TraceEvent;
16 
17 // This filter unconditionally accepts all events and pushes/pops them from the
18 // thread-local AllocationContextTracker instance as they are seen.
19 // This is used to cheaply construct the heap profiler pseudo stack without
20 // having to actually record all events.
21 class BASE_EXPORT HeapProfilerEventFilter : public TraceEventFilter {
22  public:
23   static const char kName[];
24 
25   HeapProfilerEventFilter();
26   ~HeapProfilerEventFilter() override;
27 
28   // TraceEventFilter implementation.
29   bool FilterTraceEvent(const TraceEvent& trace_event) const override;
30   void EndEvent(const char* category_name,
31                 const char* event_name) const override;
32 
33  private:
34   DISALLOW_COPY_AND_ASSIGN(HeapProfilerEventFilter);
35 };
36 
37 }  // namespace trace_event
38 }  // namespace base
39 
40 #endif  // BASE_TRACE_EVENT_HEAP_PROFILER_EVENT_FILTER_H_
41