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      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