Add async trace events to trace progress of IPC messages
BUG=79942
Review URL: https://chromiumcodereview.appspot.com/10919023
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@154840 0039d316-1c4b-4281-b951-d872f2087c98
CrOS-Libchrome-Original-Commit: 2a2e3d67d14de8e39d97273b57b1a079f25f83fd
diff --git a/ipc/ipc_message.h b/ipc/ipc_message.h
index 4603f09..1a2a45c 100644
--- a/ipc/ipc_message.h
+++ b/ipc/ipc_message.h
@@ -8,6 +8,7 @@
#include <string>
#include "base/basictypes.h"
+#include "base/debug/trace_event.h"
#include "base/pickle.h"
#include "ipc/ipc_export.h"
@@ -49,14 +50,16 @@
};
// Bit values used in the flags field.
+ // Upper 24 bits of flags store a reference number, so this enum is limited to
+ // 8 bits.
enum {
- PRIORITY_MASK = 0x0003, // Low 2 bits of store the priority value.
- SYNC_BIT = 0x0004,
- REPLY_BIT = 0x0008,
- REPLY_ERROR_BIT = 0x0010,
- UNBLOCK_BIT = 0x0020,
- PUMPING_MSGS_BIT = 0x0040,
- HAS_SENT_TIME_BIT = 0x0080,
+ PRIORITY_MASK = 0x03, // Low 2 bits of store the priority value.
+ SYNC_BIT = 0x04,
+ REPLY_BIT = 0x08,
+ REPLY_ERROR_BIT = 0x10,
+ UNBLOCK_BIT = 0x20,
+ PUMPING_MSGS_BIT = 0x40,
+ HAS_SENT_TIME_BIT = 0x80,
};
virtual ~Message();
@@ -221,6 +224,11 @@
bool dont_log() const { return dont_log_; }
#endif
+ // Called at various points between send and receive to track message.
+ void TraceMessageStep() {
+ TRACE_EVENT_ASYNC_BEGIN_STEP0("ipc", "IPC", header()->flags, NULL);
+ }
+
protected:
friend class Channel;
friend class MessageReplyDeserializer;