Properly process getOwnPropertyDescriptor for elements on global proxy object.

src/runtime.cc

 // Copyright 2010 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 761 matching lines @@
         elms->set(IS_ACCESSOR_INDEX, Heap::false_value());
         Handle<Object> element = GetElement(Handle<Object>(obj), index);
         elms->set(VALUE_INDEX, *element);
         elms->set(WRITABLE_INDEX, Heap::true_value());
         elms->set(ENUMERABLE_INDEX,  Heap::true_value());
         elms->set(CONFIGURABLE_INDEX, Heap::true_value());
         return *desc;
       }
 
       case JSObject::DICTIONARY_ELEMENT: {
+        if (obj->IsJSGlobalProxy()) {
+          Object* proto = obj->GetPrototype();
+          if (proto->IsNull()) return Heap::undefined_value();
+          ASSERT(proto->IsJSGlobalObject());
+          obj = Handle<JSObject>(JSObject::cast(proto));
+        }
         NumberDictionary* dictionary = obj->element_dictionary();
         int entry = dictionary->FindEntry(index);
         ASSERT(entry != NumberDictionary::kNotFound);
         PropertyDetails details = dictionary->DetailsAt(entry);
         switch (details.type()) {
           case CALLBACKS: {
             // This is an accessor property with getter and/or setter.
             FixedArray* callbacks =
                 FixedArray::cast(dictionary->ValueAt(entry));
             elms->set(IS_ACCESSOR_INDEX, Heap::true_value());
@@ skipping 10198 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     Counters::gc_last_resort_from_js.Increment();
     Heap::CollectAllGarbage(false);
   }
 }
 
 
 } }  // namespace v8::internal