Integrate ETW with VLOG logging.

base/logging_win.h

 // Copyright (c) 2009 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 BASE_LOGGING_WIN_H_
 #define BASE_LOGGING_WIN_H_
 #pragma once
 
 #include <string>
 #include "base/basictypes.h"
 #include "base/event_trace_provider_win.h"
 #include "base/logging.h"
 
 namespace logging {
 
 // Event ID for the log messages we generate.
 extern const GUID kLogEventId;
 
 // Feature enable mask for LogEventProvider.
 enum LogEnableMask {
   // If this bit is set in our provider enable mask, we will include
   // a stack trace with every log message.
   ENABLE_STACK_TRACE_CAPTURE = 0x0001,
+  // If this bit is set in our provider enable mask, the provider will log
+  // a LOG message with only the textual content of the message, and no
+  // stack trace.
+  ENABLE_LOG_MESSAGE_ONLY = 0x0002,
 };
 
 // The message types our log event provider generates.
 // ETW likes user message types to start at 10.
 enum LogMessageTypes {
   // A textual only log message, contains a zero-terminated string.
   LOG_MESSAGE = 10,
   // A message with a stack trace, followed by the zero-terminated
   // message text.
   LOG_MESSAGE_WITH_STACKTRACE = 11,
+  // A message with:
+  //  a stack trace,
+  //  the line number as a four byte integer,
+  //  the file as a zero terminated UTF8 string,
+  //  the zero-terminated UTF8 message text.
+  LOG_MESSAGE_FULL = 12,
 };
 
 // Trace provider class to drive log control and transport
 // with Event Tracing for Windows.
 class LogEventProvider : public EtwTraceProvider {
  public:
   LogEventProvider();
 
-  static bool LogMessage(int severity, const std::string& message);
+  static bool LogMessage(logging::LogSeverity severity, const char* file,
+      int line, size_t message_start, const std::string& str);
+
   static void Initialize(const GUID& provider_name);
   static void Uninitialize();
 
  protected:
   // Overridden to manipulate the log level on ETW control callbacks.
   virtual void OnEventsEnabled();
   virtual void OnEventsDisabled();
 
  private:
   // The log severity prior to OnEventsEnabled,
   // restored in OnEventsDisabled.
   logging::LogSeverity old_log_level_;
 
   DISALLOW_COPY_AND_ASSIGN(LogEventProvider);
 };
 
 }  // namespace logging
 
 #endif  // BASE_LOGGING_WIN_H_