Handle function proxies as getters/setters.

src/objects-inl.h

 // Copyright 2011 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 147 matching lines @@
     && HeapObject::cast(this)->map()->instance_type() < FIRST_NONSTRING_TYPE;
 }
 
 
 bool Object::IsSpecObject() {
   return Object::IsHeapObject()
     && HeapObject::cast(this)->map()->instance_type() >= FIRST_SPEC_OBJECT_TYPE;
 }
 
 
+bool Object::IsSpecFunction() {
+  if (!Object::IsHeapObject()) return false;
+  InstanceType type = HeapObject::cast(this)->map()->instance_type();
+  return type == JS_FUNCTION_TYPE || type == JS_FUNCTION_PROXY_TYPE;
+}
+
+
 bool Object::IsSymbol() {
   if (!this->IsHeapObject()) return false;
   uint32_t type = HeapObject::cast(this)->map()->instance_type();
   // Because the symbol tag is non-zero and no non-string types have the
   // symbol bit set we can test for symbols with a very simple test
   // operation.
   STATIC_ASSERT(kSymbolTag != 0);
   ASSERT(kNotStringTag + kIsSymbolMask > LAST_TYPE);
   return (type & kIsSymbolMask) != 0;
 }
@@ skipping 4504 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_