Implement loads and calls from 'super'

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index e6277060732e9d71feb9d592af657a3dff31e406..692c4547b9e2d3e038edbb8271ab4b36c2ac7d44 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -2072,6 +2072,25 @@ RUNTIME_FUNCTION(Runtime_HomeObjectSymbol) {
 }
 
 
+RUNTIME_FUNCTION(Runtime_LoadFromSuper) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 3);
+  CONVERT_ARG_HANDLE_CHECKED(JSObject, base_value, 0);
+  CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 1);
+  CONVERT_ARG_HANDLE_CHECKED(Name, name, 2);
+
+  LookupIterator it(receiver, name, base_value);
+  it.LookupForRead();

[Toon Verwaest, 2014/09/15 11:57:20]

I don't understand why you need this weird setup. Why not just do
Object::GetProperty(&it) immediately?

[Dmitry Lomov (no reviews), 2014/09/15 12:31:12]

Done.

+  Handle<Object> result;
+  if (it.IsFound()) {
+    ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
+                                       Object::GetProperty(&it));
+    return *result;
+  }
+  return isolate->heap()->undefined_value();
+}
+
+
 RUNTIME_FUNCTION(Runtime_IsExtensible) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 1);