js accessor creation on Template

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index f6da37176bdf19ad127de7a99e805931619d9c4d..1e1570f7db297009f90d188e23d853e3b8f74d54 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -1944,6 +1944,43 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_EnableAccessChecks) {
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_DefineJsAccessor) {
+  HandleScope scope(isolate);
+  ASSERT(args.length() == 3);
+  CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
+  CONVERT_ARG_HANDLE_CHECKED(Object, array_object, 1);
+  CONVERT_SMI_ARG_CHECKED(offset, 2);
+  // Order of array contents is determined in Template::SetAccessor.
+  NeanderArray array(array_object);
+  Handle<String> name(String::cast(array.get(offset++)), isolate);
+  Handle<Object> getter(array.get(offset++), isolate);
+  Handle<Object> setter(array.get(offset++), isolate);
+  v8::AccessControl access_control =
+      static_cast<v8::AccessControl>(Smi::cast(array.get(offset++))->value());
+  PropertyAttributes attributes =
+      static_cast<PropertyAttributes>(Smi::cast(array.get(offset++))->value());
+  // Transform getter into something DefineAccessor can handle.
+  if (getter->IsUndefined()) {
+    getter = isolate->factory()->null_value();
+  } else {
+    Handle<FunctionTemplateInfo> info =
+        Handle<FunctionTemplateInfo>::cast(getter);
+    getter = Utils::OpenHandle(*Utils::ToLocal(info)->GetFunction());
+  }
+  // Transform getter into something DefineAccessor can handle.
+  if (setter->IsUndefined()) {
+    setter = isolate->factory()->null_value();
+  } else {
+    Handle<FunctionTemplateInfo> info =
+        Handle<FunctionTemplateInfo>::cast(setter);
+    setter = Utils::OpenHandle(*Utils::ToLocal(info)->GetFunction());
+  }
+  JSObject::DefineAccessor(
+      object, name, getter, setter, attributes, access_control);
+  return isolate->heap()->undefined_value();
+}
+
+
 static Failure* ThrowRedeclarationError(Isolate* isolate,
                                         const char* type,
                                         Handle<String> name) {