Do not JSON encode the 'result' of a service rpc.

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"
 
 namespace dart {
 
 // Translate from the legacy DebugEvent to a ServiceEvent.
 static ServiceEvent::EventType TranslateEventType(
@@ skipping 18 matching lines @@
         UNREACHABLE();
         return ServiceEvent::kIllegal;
     }
 }
 
 ServiceEvent::ServiceEvent(const DebuggerEvent* debugger_event)
     : isolate_(debugger_event->isolate()),
       type_(TranslateEventType(debugger_event->type())),
       breakpoint_(NULL),
       top_frame_(NULL),
-      exception_(NULL) {
+      exception_(NULL),
+      gc_stats_(NULL) {
   DebuggerEvent::EventType type = debugger_event->type();
   if (type == DebuggerEvent::kBreakpointReached) {
     set_breakpoint(debugger_event->breakpoint());
   }
   if (type == DebuggerEvent::kExceptionThrown) {
     set_exception(debugger_event->exception());
   }
   if (type == DebuggerEvent::kBreakpointReached ||
       type == DebuggerEvent::kIsolateInterrupted ||
       type == DebuggerEvent::kExceptionThrown) {
@@ skipping 21 matching lines @@
     case kPauseException:
       return "PauseException";
     case kResume:
       return "Resume";
     case kBreakpointAdded:
       return "BreakpointAdded";
     case kBreakpointResolved:
       return "BreakpointResolved";
     case kBreakpointRemoved:
       return "BreakpointRemoved";
+    case kGC:
+      return "GC";  // TODO(koda): Change to GarbageCollected.
     default:
       UNREACHABLE();
       return "Unknown";
   }
 }
 
 
 void ServiceEvent::PrintJSON(JSONStream* js) const {
   JSONObject jsobj(js);
   jsobj.AddProperty("type", "ServiceEvent");
   jsobj.AddProperty("eventType", EventTypeToCString(type()));
   jsobj.AddProperty("isolate", isolate());
   if (breakpoint() != NULL) {
     jsobj.AddProperty("breakpoint", breakpoint());
   }
   if (top_frame() != NULL) {
     JSONObject jsFrame(&jsobj, "topFrame");
     top_frame()->PrintToJSONObject(&jsFrame);
   }
   if (exception() != NULL) {
     jsobj.AddProperty("exception", *(exception()));
   }
+  if (gc_stats() != NULL) {
+    jsobj.AddProperty("reason", Heap::GCReasonToString(gc_stats()->reason_));
+    isolate()->heap()->PrintToJSONObject(Heap::kNew, &jsobj);
+    isolate()->heap()->PrintToJSONObject(Heap::kOld, &jsobj);
+  }
 }
 
 }  // namespace dart