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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_TRACING_CHILD_TRACE_MESSAGE_FILTER_H_
#define COMPONENTS_TRACING_CHILD_TRACE_MESSAGE_FILTER_H_
#include "base/bind.h"
#include "base/memory/ref_counted_memory.h"
#include "base/metrics/histogram.h"
#include "base/time/time.h"
#include "base/trace_event/memory_dump_request_args.h"
#include "components/tracing/tracing_export.h"
#include "ipc/message_filter.h"
namespace base {
class SingleThreadTaskRunner;
}
namespace tracing {
// This class sends and receives trace messages on child processes.
class TRACING_EXPORT ChildTraceMessageFilter : public IPC::MessageFilter {
public:
explicit ChildTraceMessageFilter(
base::SingleThreadTaskRunner* ipc_task_runner);
// IPC::MessageFilter implementation.
void OnFilterAdded(IPC::Sender* sender) override;
void OnFilterRemoved() override;
bool OnMessageReceived(const IPC::Message& message) override;
void SendGlobalMemoryDumpRequest(
const base::trace_event::MemoryDumpRequestArgs& args,
const base::trace_event::MemoryDumpCallback& callback);
base::SingleThreadTaskRunner* ipc_task_runner() const {
return ipc_task_runner_;
}
protected:
~ChildTraceMessageFilter() override;
private:
// Message handlers.
void OnBeginTracing(const std::string& trace_config_str,
base::TraceTicks browser_time,
uint64 tracing_process_id);
void OnEndTracing();
void OnCancelTracing();
void OnEnableMonitoring(const std::string& trace_config_str,
base::TraceTicks browser_time);
void OnDisableMonitoring();
void OnCaptureMonitoringSnapshot();
void OnGetTraceLogStatus();
void OnSetWatchEvent(const std::string& category_name,
const std::string& event_name);
void OnCancelWatchEvent();
void OnWatchEventMatched();
void OnProcessMemoryDumpRequest(
const base::trace_event::MemoryDumpRequestArgs& args);
void OnGlobalMemoryDumpResponse(uint64 dump_guid, bool success);
void OnSetUMACallback(const std::string& histogram_name, int histogram_value);
void OnClearUMACallback(const std::string& histogram_name);
void OnHistogramChanged(const std::string& histogram_name,
base::Histogram::Sample reference_value,
base::Histogram::Sample actual_value);
void SendTriggerMessage(const std::string& histogram_name);
// Callback from trace subsystem.
void OnTraceDataCollected(
const scoped_refptr<base::RefCountedString>& events_str_ptr,
bool has_more_events);
void OnMonitoringTraceDataCollected(
const scoped_refptr<base::RefCountedString>& events_str_ptr,
bool has_more_events);
void OnProcessMemoryDumpDone(uint64 dump_guid, bool success);
IPC::Sender* sender_;
base::SingleThreadTaskRunner* ipc_task_runner_;
// guid of the outstanding request (to the Browser's MemoryDumpManager), if
// any. 0 if there is no request pending.
uint64 pending_memory_dump_guid_;
// callback of the outstanding memory dump request, if any.
base::trace_event::MemoryDumpCallback pending_memory_dump_callback_;
base::Time histogram_last_changed_;
DISALLOW_COPY_AND_ASSIGN(ChildTraceMessageFilter);
};
} // namespace tracing
#endif // COMPONENTS_TRACING_CHILD_TRACE_MESSAGE_FILTER_H_
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