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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.
#include "components/tracing/child_trace_message_filter.h"
#include "base/debug/trace_event.h"
#include "base/message_loop_proxy.h"
#include "components/tracing/tracing_messages.h"
using base::debug::TraceLog;
namespace components {
ChildTraceMessageFilter::ChildTraceMessageFilter(
base::MessageLoopProxy* ipc_message_loop)
: channel_(NULL),
ipc_message_loop_(ipc_message_loop) {}
void ChildTraceMessageFilter::OnFilterAdded(IPC::Channel* channel) {
channel_ = channel;
TraceLog::GetInstance()->SetNotificationCallback(
base::Bind(&ChildTraceMessageFilter::OnTraceNotification, this));
channel_->Send(new TracingHostMsg_ChildSupportsTracing());
}
void ChildTraceMessageFilter::OnFilterRemoved() {
TraceLog::GetInstance()->SetNotificationCallback(
TraceLog::NotificationCallback());
}
bool ChildTraceMessageFilter::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(ChildTraceMessageFilter, message)
IPC_MESSAGE_HANDLER(TracingMsg_BeginTracing, OnBeginTracing)
IPC_MESSAGE_HANDLER(TracingMsg_EndTracing, OnEndTracing)
IPC_MESSAGE_HANDLER(TracingMsg_GetTraceBufferPercentFull,
OnGetTraceBufferPercentFull)
IPC_MESSAGE_HANDLER(TracingMsg_SetWatchEvent, OnSetWatchEvent)
IPC_MESSAGE_HANDLER(TracingMsg_CancelWatchEvent, OnCancelWatchEvent)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
ChildTraceMessageFilter::~ChildTraceMessageFilter() {}
void ChildTraceMessageFilter::OnBeginTracing(
const std::vector<std::string>& included_categories,
const std::vector<std::string>& excluded_categories,
base::TimeTicks browser_time) {
#if defined(__native_client__)
// NaCl and system times are offset by a bit, so subtract some time from
// the captured timestamps. The value might be off by a bit due to messaging
// latency.
base::TimeDelta time_offset = base::TimeTicks::NowFromSystemTraceTime() -
browser_time;
TraceLog::GetInstance()->SetTimeOffset(time_offset);
#endif
TraceLog::GetInstance()->SetEnabled(included_categories,
excluded_categories);
}
void ChildTraceMessageFilter::OnEndTracing() {
TraceLog::GetInstance()->SetDisabled();
// Flush will generate one or more callbacks to OnTraceDataCollected. It's
// important that the last OnTraceDataCollected gets called before
// EndTracingAck below. We are already on the IO thread, so the
// OnTraceDataCollected calls will not be deferred.
TraceLog::GetInstance()->Flush(
base::Bind(&ChildTraceMessageFilter::OnTraceDataCollected, this));
std::vector<std::string> categories;
TraceLog::GetInstance()->GetKnownCategories(&categories);
channel_->Send(new TracingHostMsg_EndTracingAck(categories));
}
void ChildTraceMessageFilter::OnGetTraceBufferPercentFull() {
float bpf = TraceLog::GetInstance()->GetBufferPercentFull();
channel_->Send(new TracingHostMsg_TraceBufferPercentFullReply(bpf));
}
void ChildTraceMessageFilter::OnSetWatchEvent(const std::string& category_name,
const std::string& event_name) {
TraceLog::GetInstance()->SetWatchEvent(category_name.c_str(),
event_name.c_str());
}
void ChildTraceMessageFilter::OnCancelWatchEvent() {
TraceLog::GetInstance()->CancelWatchEvent();
}
void ChildTraceMessageFilter::OnTraceDataCollected(
const scoped_refptr<base::RefCountedString>& events_str_ptr) {
if (!ipc_message_loop_->BelongsToCurrentThread()) {
ipc_message_loop_->PostTask(FROM_HERE,
base::Bind(&ChildTraceMessageFilter::OnTraceDataCollected, this,
events_str_ptr));
return;
}
channel_->Send(new TracingHostMsg_TraceDataCollected(
events_str_ptr->data()));
}
void ChildTraceMessageFilter::OnTraceNotification(int notification) {
if (!ipc_message_loop_->BelongsToCurrentThread()) {
ipc_message_loop_->PostTask(FROM_HERE,
base::Bind(&ChildTraceMessageFilter::OnTraceNotification, this,
notification));
return;
}
channel_->Send(new TracingHostMsg_TraceNotification(notification));
}
} // namespace components
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