Home | History | Annotate | Download | only in tracing 
      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 CONTENT_BROWSER_TRACING_TRACE_MESSAGE_FILTER_H_
      6 #define CONTENT_BROWSER_TRACING_TRACE_MESSAGE_FILTER_H_
      7 
      8 #include <string>
      9 #include <vector>
     10 
     11 #include "base/debug/trace_event.h"
     12 #include "content/public/browser/browser_message_filter.h"
     13 
     14 namespace content {
     15 
     16 // This class sends and receives trace messages on the browser process.
     17 // See also: tracing_controller.h
     18 // See also: child_trace_message_filter.h
     19 class TraceMessageFilter : public BrowserMessageFilter {
     20  public:
     21   TraceMessageFilter();
     22 
     23   // BrowserMessageFilter implementation.
     24   virtual void OnChannelClosing() OVERRIDE;
     25   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
     26 
     27   void SendBeginTracing(const base::debug::CategoryFilter& category_filter_str,
     28                         const base::debug::TraceOptions& options);
     29   void SendEndTracing();
     30   void SendEnableMonitoring(const base::debug::CategoryFilter& category_filter,
     31                             const base::debug::TraceOptions& options);
     32   void SendDisableMonitoring();
     33   void SendCaptureMonitoringSnapshot();
     34   void SendGetTraceBufferPercentFull();
     35   void SendSetWatchEvent(const std::string& category_name,
     36                          const std::string& event_name);
     37   void SendCancelWatchEvent();
     38 
     39  protected:
     40   virtual ~TraceMessageFilter();
     41 
     42  private:
     43   // Message handlers.
     44   void OnChildSupportsTracing();
     45   void OnEndTracingAck(const std::vector<std::string>& known_categories);
     46   void OnCaptureMonitoringSnapshotAcked();
     47   void OnWatchEventMatched();
     48   void OnTraceBufferPercentFullReply(float percent_full);
     49   void OnTraceDataCollected(const std::string& data);
     50   void OnMonitoringTraceDataCollected(const std::string& data);
     51 
     52   // ChildTraceMessageFilter exists:
     53   bool has_child_;
     54 
     55   // Awaiting ack for previously sent SendEndTracing
     56   bool is_awaiting_end_ack_;
     57   // Awaiting ack for previously sent SendCaptureMonitoringSnapshot
     58   bool is_awaiting_capture_monitoring_snapshot_ack_;
     59   // Awaiting ack for previously sent SendGetTraceBufferPercentFull
     60   bool is_awaiting_buffer_percent_full_ack_;
     61 
     62   DISALLOW_COPY_AND_ASSIGN(TraceMessageFilter);
     63 };
     64 
     65 }  // namespace content
     66 
     67 #endif  // CONTENT_BROWSER_TRACING_TRACE_MESSAGE_FILTER_H_
     68