Add traces for SyncChannel::SendWithTimeout

ipc/ipc_sync_channel.cc

 // 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 "ipc/ipc_sync_channel.h"
 
 #include "base/bind.h"
+#include "base/debug/trace_event.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/synchronization/waitable_event_watcher.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/thread_local.h"
+#include "ipc/ipc_logging.h"
+#include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_sync_message.h"
 
 using base::TimeDelta;
 using base::TimeTicks;
 using base::WaitableEvent;
 
 namespace IPC {
 // When we're blocked in a Send(), we need to process incoming synchronous
 // messages right away because it could be blocking our reply (either
 // directly from the same object we're calling, or indirectly through one or
@@ skipping 396 matching lines @@
 
 void SyncChannel::SetRestrictDispatchChannelGroup(int group) {
   sync_context()->set_restrict_dispatch_group(group);
 }
 
 bool SyncChannel::Send(Message* message) {
   return SendWithTimeout(message, base::kNoTimeout);
 }
 
 bool SyncChannel::SendWithTimeout(Message* message, int timeout_ms) {
+#ifdef IPC_MESSAGE_LOG_ENABLED
+  Logging* logger = Logging::GetInstance();
+  std::string name;
+  logger->GetMessageText(message->type(), &name, message, NULL);
+  TRACE_EVENT1("task", "SyncChannel::SendWithTimeout",
+               "name", name);
+#else
+  TRACE_EVENT2("task", "SyncChannel::SendWithTimeout",
+               "class", IPC_MESSAGE_ID_CLASS(message->type()),
+               "line", IPC_MESSAGE_ID_LINE(message->type()));
+#endif
   if (!message->is_sync()) {
     ChannelProxy::Send(message);
     return true;
   }
 
   // *this* might get deleted in WaitForReply.
   scoped_refptr<SyncContext> context(sync_context());
   if (context->shutdown_event()->IsSignaled()) {
     VLOG(1) << "shutdown event is signaled";
     delete message;
@@ skipping 102 matching lines @@
   // Ideally we only want to watch this object when running a nested message
   // loop.  However, we don't know when it exits if there's another nested
   // message loop running under it or not, so we wouldn't know whether to
   // stop or keep watching.  So we always watch it, and create the event as
   // manual reset since the object watcher might otherwise reset the event
   // when we're doing a WaitMany.
   dispatch_watcher_.StartWatching(sync_context()->GetDispatchEvent(), this);
 }
 
 }  // namespace IPC