src/components/tracing/child_trace_message_filter.h

   1 // Copyright (c) 2012 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 COMPONENTS_TRACING_CHILD_TRACE_MESSAGE_FILTER_H_
   6 #define COMPONENTS_TRACING_CHILD_TRACE_MESSAGE_FILTER_H_
   7
   8 #include "base/bind.h"
   9 #include "base/memory/ref_counted_memory.h"
  10 #include "ipc/message_filter.h"
  11
  12 namespace base {
  13 class MessageLoopProxy;
  14 }
  15
  16 namespace tracing {
  17
  18 // This class sends and receives trace messages on child processes.
  19 class ChildTraceMessageFilter : public IPC::MessageFilter {
  20  public:
  21   explicit ChildTraceMessageFilter(base::MessageLoopProxy* ipc_message_loop);
  22
  23   // IPC::MessageFilter implementation.
  24   void OnFilterAdded(IPC::Sender* sender) override;
  25   void OnFilterRemoved() override;
  26   bool OnMessageReceived(const IPC::Message& message) override;
  27
  28  protected:
  29   ~ChildTraceMessageFilter() override;
  30
  31  private:
  32   // Message handlers.
  33   void OnBeginTracing(const std::string& category_filter_str,
  34                       base::TimeTicks browser_time,
  35                       const std::string& options);
  36   void OnEndTracing();
  37   void OnEnableMonitoring(const std::string& category_filter_str,
  38                           base::TimeTicks browser_time,
  39                           const std::string& options);
  40   void OnDisableMonitoring();
  41   void OnCaptureMonitoringSnapshot();
  42   void OnGetTraceBufferPercentFull();
  43   void OnSetWatchEvent(const std::string& category_name,
  44                        const std::string& event_name);
  45   void OnCancelWatchEvent();
  46   void OnWatchEventMatched();
  47
  48   // Callback from trace subsystem.
  49   void OnTraceDataCollected(
  50       const scoped_refptr<base::RefCountedString>& events_str_ptr,
  51       bool has_more_events);
  52
  53   void OnMonitoringTraceDataCollected(
  54       const scoped_refptr<base::RefCountedString>& events_str_ptr,
  55       bool has_more_events);
  56
  57   IPC::Sender* sender_;
  58   base::MessageLoopProxy* ipc_message_loop_;
  59
  60   DISALLOW_COPY_AND_ASSIGN(ChildTraceMessageFilter);
  61 };
  62
  63 }  // namespace tracing
  64
  65 #endif  // COMPONENTS_TRACING_CHILD_TRACE_MESSAGE_FILTER_H_