Create pre-frozen change records for Object.observe

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 13427 matching lines @@
   ASSERT(args.length() == 1);
   Object* object = args[0];
   if (object->IsJSGlobalProxy()) {
     object = object->GetPrototype();
     if (object->IsNull()) return isolate->heap()->undefined_value();
   }
   return object;
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_EnqueueChangeRecord) {
+  HandleScope scope(isolate);
+  ASSERT(args.length() == 4);
+  CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
+  CONVERT_ARG_HANDLE_CHECKED(String, type, 1);
+  CONVERT_ARG_HANDLE_CHECKED(String, name, 2);
+  Handle<Object> old_value = args.at<Object>(3);
+  JSObject::EnqueueChangeRecord(object, type, name, old_value);
+  return isolate->heap()->undefined_value();
+}
+
+
 // ----------------------------------------------------------------------------
 // Implementation of Runtime
 
 #define F(name, number_of_args, result_size)                             \
   { Runtime::k##name, Runtime::RUNTIME, #name,   \
     FUNCTION_ADDR(Runtime_##name), number_of_args, result_size },
 
 
 #define I(name, number_of_args, result_size)                             \
   { Runtime::kInline##name, Runtime::INLINE,     \
@@ skipping 66 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal