Disable the profiler when a debugger is attached

runtime/vm/thread_interrupter_win.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "vm/flags.h"
 #include "vm/os.h"
 #include "vm/profiler.h"
@@ skipping 75 matching lines @@
     Thread* thread = os_thread->thread();
     if (thread != NULL) {
       Profiler::SampleThread(thread, its);
     }
     ResumeThread(handle);
     CloseHandle(handle);
   }
 };
 
 
+bool ThreadInterrupter::IsDebuggerAttached() {
+  return false;
+}
+
+
 void ThreadInterrupter::InterruptThread(OSThread* thread) {
   if (FLAG_trace_thread_interrupter) {
     OS::Print("ThreadInterrupter suspending %p\n",
               reinterpret_cast<void*>(thread->id()));
   }
   ThreadInterrupterWin::Interrupt(thread);
   if (FLAG_trace_thread_interrupter) {
     OS::Print("ThreadInterrupter resuming %p\n",
               reinterpret_cast<void*>(thread->id()));
   }
 }
 
 
 void ThreadInterrupter::InstallSignalHandler() {
   // Nothing to do on Windows.
 }
 
 
 void ThreadInterrupter::RemoveSignalHandler() {
   // Nothing to do on Windows.
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)