Add step OverAwait to service protocol

runtime/vm/service_event.cc

 // Copyright (c) 2015, 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/service_event.h"
 
 #include "vm/message_handler.h"
 
 namespace dart {
 
@@ skipping 206 matching lines @@
     JSONObject jsFrame(&jsobj, "topFrame");
     top_frame()->PrintToJSONObject(&jsFrame);
     intptr_t index = 0;  // Avoid ambiguity in call to AddProperty.
     jsFrame.AddProperty("index", index);
   }
   if (exception() != NULL) {
     jsobj.AddProperty("exception", *(exception()));
   }
   if (async_continuation() != NULL && !async_continuation()->IsNull()) {
     jsobj.AddProperty("_asyncContinuation", *(async_continuation()));
     jsobj.AddProperty("_atAsyncJump", at_async_jump());

[rmacnak, 2016/02/16 21:21:59]

Don't need _atAsyncJump then.

[Cutch, 2016/02/17 18:24:21]

Done.

+    jsobj.AddProperty("atAwait", at_async_jump());

[rmacnak, 2016/02/16 21:21:59]

It's await or yield or yield*.

[Cutch, 2016/02/17 18:24:21]

bit on pause event:
atAsyncContinuation

bit on breakpoint:
isSyntheticAsyncContinuation

step command:
OverAsyncContinuation

   }
   if (inspectee() != NULL) {
     jsobj.AddProperty("inspectee", *(inspectee()));
   }
   if (gc_stats() != NULL) {
     jsobj.AddProperty("reason", Heap::GCReasonToString(gc_stats()->reason_));
     isolate()->heap()->PrintToJSONObject(Heap::kNew, &jsobj);
     isolate()->heap()->PrintToJSONObject(Heap::kOld, &jsobj);
   }
   if (bytes() != NULL) {
@@ skipping 31 matching lines @@
   } else {
     jsobj->AddProperty("isolate", isolate());
   }
   ASSERT(timestamp_ != -1);
   jsobj->AddPropertyTimeMillis("timestamp", timestamp_);
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart