Handle JavaScript accessors on the global object...

src/objects.cc

 // Copyright 2006-2009 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 2720 matching lines @@
     // If name is an index we need to stay in slow case.
     Dictionary* elements = Dictionary::cast(dict);
     elements->set_requires_slow_elements();
     // Set the potential new dictionary on the object.
     set_elements(Dictionary::cast(dict));
   } else {
     // Normalize object to make this operation simple.
     Object* ok = NormalizeProperties(CLEAR_INOBJECT_PROPERTIES);
     if (ok->IsFailure()) return ok;
 
+    // For the global object allocate a new map to invalidate the global inline
+    // caches which have a global property cell reference directly in the code.
+    if (IsJSGlobalObject()) {
+      Object* new_map = map()->CopyDropDescriptors();
+      if (new_map->IsFailure()) return new_map;
+      set_map(Map::cast(new_map));
+    }
+
     // Update the dictionary with the new CALLBACKS property.
     return SetNormalizedProperty(name, structure, details);
   }
 
   return structure;
 }
 
 
 Object* JSObject::DefineAccessor(String* name, bool is_getter, JSFunction* fun,
                                  PropertyAttributes attributes) {
@@ skipping 4880 matching lines @@
   // No break point.
   if (break_point_objects()->IsUndefined()) return 0;
   // Single beak point.
   if (!break_point_objects()->IsFixedArray()) return 1;
   // Multiple break points.
   return FixedArray::cast(break_point_objects())->length();
 }
 #endif
 
 } }  // namespace v8::internal