trace_event support for thread names

base/threading/platform_thread.h

 // Copyright (c) 2011 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.
 
 // WARNING: You should *NOT* be using this class directly.  PlatformThread is
 // the low-level platform-specific abstraction to the OS's threading interface.
 // You should instead be using a message-loop driven Thread, see thread.h.
 
 #ifndef BASE_THREADING_PLATFORM_THREAD_H_
 #define BASE_THREADING_PLATFORM_THREAD_H_
@@ skipping 56 matching lines @@
 
   // Gets the current thread id, which may be useful for logging purposes.
   static PlatformThreadId CurrentId();
 
   // Yield the current thread so another thread can be scheduled.
   static void YieldCurrentThread();
 
   // Sleeps for the specified duration (units are milliseconds).
   static void Sleep(int duration_ms);
 
-  // Sets the thread name visible to a debugger.  This has no effect otherwise.
+  // Sets the thread name visible to debuggers/tools. This has no effect
+  // otherwise. This name pointer is not copied internally. Thus, it must stay
+  // valid until the thread ends.
   static void SetName(const char* name);
 
+  // Gets the thread name, if previously set by SetName.
+  static const char* GetName();
+
   // Creates a new thread.  The |stack_size| parameter can be 0 to indicate
   // that the default stack size should be used.  Upon success,
   // |*thread_handle| will be assigned a handle to the newly created thread,
   // and |delegate|'s ThreadMain method will be executed on the newly created
   // thread.
   // NOTE: When you are done with the thread handle, you must call Join to
   // release system resources associated with the thread.  You must ensure that
   // the Delegate object outlives the thread.
   static bool Create(size_t stack_size, Delegate* delegate,
                      PlatformThreadHandle* thread_handle);
@@ skipping 11 matching lines @@
   static void SetThreadPriority(PlatformThreadHandle handle,
                                 ThreadPriority priority);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PlatformThread);
 };
 
 }  // namespace base
 
 #endif  // BASE_THREADING_PLATFORM_THREAD_H_