Handle non-JSObject heap objects using slow-path IC stub guarded by the map.

src/objects.cc

 // Copyright 2013 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 4461 matching lines @@
 
 
 void NormalizedMapCache::Clear() {
   int entries = length();
   for (int i = 0; i != entries; i++) {
     set_undefined(i);
   }
 }
 
 
-void JSObject::UpdateMapCodeCache(Handle<JSObject> object,
-                                  Handle<Name> name,
-                                  Handle<Code> code) {
+void HeapObject::UpdateMapCodeCache(Handle<HeapObject> object,
+                                    Handle<Name> name,
+                                    Handle<Code> code) {
   Handle<Map> map(object->map());
   if (map->is_shared()) {
+    Handle<JSObject> receiver = Handle<JSObject>::cast(object);
     // Fast case maps are never marked as shared.
-    ASSERT(!object->HasFastProperties());
+    ASSERT(!receiver->HasFastProperties());
     // Replace the map with an identical copy that can be safely modified.
     map = Map::CopyNormalized(map, KEEP_INOBJECT_PROPERTIES,
                               UNIQUE_NORMALIZED_MAP);
-    object->GetIsolate()->counters()->normalized_maps()->Increment();
-    object->set_map(*map);
+    receiver->GetIsolate()->counters()->normalized_maps()->Increment();
+    receiver->set_map(*map);
   }
   Map::UpdateCodeCache(map, name, code);
 }
 
 
 void JSObject::NormalizeProperties(Handle<JSObject> object,
                                    PropertyNormalizationMode mode,
                                    int expected_additional_properties) {
   CALL_HEAP_FUNCTION_VOID(object->GetIsolate(),
                           object->NormalizeProperties(
@@ skipping 11584 matching lines @@
 #define ERROR_MESSAGES_TEXTS(C, T) T,
   static const char* error_messages_[] = {
       ERROR_MESSAGES_LIST(ERROR_MESSAGES_TEXTS)
   };
 #undef ERROR_MESSAGES_TEXTS
   return error_messages_[reason];
 }
 
 
 } }  // namespace v8::internal