trace_event support for thread names

base/threading/platform_thread_win.cc

 // 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.
 
 #include "base/threading/platform_thread.h"
 
 #include "base/logging.h"
+#include "base/threading/thread_local.h"
 #include "base/threading/thread_restrictions.h"
+
 #include "base/win/windows_version.h"
 
 namespace base {
 
 namespace {
 
+static ThreadLocalPointer<char> current_thread_name;
+
 // The information on how to set the thread name comes from
 // a MSDN article: http://msdn2.microsoft.com/en-us/library/xcb2z8hs.aspx
 const DWORD kVCThreadNameException = 0x406D1388;
 
 typedef struct tagTHREADNAME_INFO {
   DWORD dwType;  // Must be 0x1000.
   LPCSTR szName;  // Pointer to name (in user addr space).
   DWORD dwThreadID;  // Thread ID (-1=caller thread).
   DWORD dwFlags;  // Reserved for future use, must be zero.
 } THREADNAME_INFO;
@@ skipping 62 matching lines @@
   ::Sleep(0);
 }
 
 // static
 void PlatformThread::Sleep(int duration_ms) {
   ::Sleep(duration_ms);
 }
 
 // static
 void PlatformThread::SetName(const char* name) {
+  current_thread_name.Set(const_cast<char*>(name));
+
   // The debugger needs to be around to catch the name in the exception.  If
   // there isn't a debugger, we are just needlessly throwing an exception.
   if (!::IsDebuggerPresent())
     return;
 
   THREADNAME_INFO info;
   info.dwType = 0x1000;
   info.szName = name;
   info.dwThreadID = CurrentId();
   info.dwFlags = 0;
 
   __try {
     RaiseException(kVCThreadNameException, 0, sizeof(info)/sizeof(DWORD),
                    reinterpret_cast<DWORD_PTR*>(&info));
   } __except(EXCEPTION_CONTINUE_EXECUTION) {
   }
 }
 
 // static
+const char* PlatformThread::GetName() {
+  return current_thread_name.Get();
+}
+
+// static
 bool PlatformThread::Create(size_t stack_size, Delegate* delegate,
                             PlatformThreadHandle* thread_handle) {
   DCHECK(thread_handle);
   return CreateThreadInternal(stack_size, delegate, thread_handle);
 }
 
 // static
 bool PlatformThread::CreateNonJoinable(size_t stack_size, Delegate* delegate) {
   return CreateThreadInternal(stack_size, delegate, NULL);
 }
@@ skipping 18 matching lines @@
   CloseHandle(thread_handle);
 }
 
 // static
 void PlatformThread::SetThreadPriority(PlatformThreadHandle, ThreadPriority) {
   // TODO(crogers): implement
   NOTIMPLEMENTED();
 }
 
 }  // namespace base