Handle vmservice messages while at breakpoint.

runtime/vm/dart_api_impl.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 "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/bigint_operations.h"
@@ skipping 1015 matching lines @@
   if (!isolate->message_handler()->HandleNextMessage()) {
     Dart_Handle error = Api::NewHandle(isolate,
                                        isolate->object_store()->sticky_error());
     isolate->object_store()->clear_sticky_error();
     return error;
   }
   return Api::Success();
 }
 
 
+DART_EXPORT bool Dart_HandleServiceMessages() {
+  Isolate* isolate = Isolate::Current();
+  CHECK_ISOLATE_SCOPE(isolate);
+  CHECK_CALLBACK_STATE(isolate);
+  isolate->message_handler()->HandleOOBMessages();
+  // TODO(turnidge): The return value here should indicate whether an
+  // OOB message should cause the program to resume.  Implement.
+  return false;
+}
+
+
 DART_EXPORT bool Dart_HasLivePorts() {
   Isolate* isolate = Isolate::Current();
   ASSERT(isolate);
   return isolate->message_handler()->HasLivePorts();
 }
 
 
 static uint8_t* allocator(uint8_t* ptr, intptr_t old_size, intptr_t new_size) {
   void* new_ptr = realloc(reinterpret_cast<void*>(ptr), new_size);
   return reinterpret_cast<uint8_t*>(new_ptr);
@@ skipping 3397 matching lines @@
   }
   {
     NoGCScope no_gc;
     RawObject* raw_obj = obj.raw();
     isolate->heap()->SetPeer(raw_obj, peer);
   }
   return Api::Success();
 }
 
 }  // namespace dart