src/content/browser/tracing/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 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   void OnChannelClosing() override;
  25   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   ~TraceMessageFilter() override;
  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_