Timeline service protocol support with Observatory UI

runtime/vm/debugger.cc

 // Copyright (c) 2012, 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 "vm/debugger.h"
 
 #include "include/dart_api.h"
 
 #include "vm/code_generator.h"
 #include "vm/code_patcher.h"
@@ skipping 2500 matching lines @@
   ASSERT(!IsPaused());  // No recursive pausing.
   ASSERT(obj_cache_ == NULL);
 
   pause_event_ = event;
   pause_event_->UpdateTimestamp();
   obj_cache_ = new RemoteObjectCache(64);
 
   // We are about to invoke the debuggers event handler. Disable interrupts
   // for this thread while waiting for debug commands over the service protocol.
   {
-    DisableThreadInterruptsScope dtis(Thread::Current());
+    Thread* thread = Thread::Current();
+    DisableThreadInterruptsScope dtis(thread);
+    TimelineDurationScope tds(thread,
+                              isolate_->GetDebuggerStream(),
+                              "Debugger Pause");
     InvokeEventHandler(event);
   }
 
   pause_event_ = NULL;
   obj_cache_ = NULL;    // Zone allocated
 }
 
 
 void Debugger::EnterSingleStepMode() {
   stepping_fp_ = 0;
@@ skipping 718 matching lines @@
 }
 
 
 void Debugger::RegisterCodeBreakpoint(CodeBreakpoint* bpt) {
   ASSERT(bpt->next() == NULL);
   bpt->set_next(code_breakpoints_);
   code_breakpoints_ = bpt;
 }
 
 }  // namespace dart