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 virtual void OnFilterAdded(IPC::Sender* sender) OVERRIDE; 25 virtual void OnFilterRemoved() OVERRIDE; 26 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; 27 28 protected: 29 virtual ~ChildTraceMessageFilter(); 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_ 66