Introducing GlobalDictionary, a backing store for global objects.

src/objects-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 887 matching lines @@
   return IsHashTable() &&
       this != HeapObject::cast(this)->GetHeap()->string_table();
 }
 
 
 bool Object::IsNameDictionary() const {
   return IsDictionary();
 }
 
 
+bool Object::IsGlobalDictionary() const { return IsDictionary(); }
+
+
 bool Object::IsSeededNumberDictionary() const {
   return IsDictionary();
 }
 
 
 bool Object::IsUnseededNumberDictionary() const {
   return IsDictionary();
 }
 
 
@@ skipping 2457 matching lines @@
 CAST_ACCESSOR(ExternalTwoByteString)
 CAST_ACCESSOR(ExternalUint16Array)
 CAST_ACCESSOR(ExternalUint32Array)
 CAST_ACCESSOR(ExternalUint8Array)
 CAST_ACCESSOR(ExternalUint8ClampedArray)
 CAST_ACCESSOR(FixedArray)
 CAST_ACCESSOR(FixedArrayBase)
 CAST_ACCESSOR(FixedDoubleArray)
 CAST_ACCESSOR(FixedTypedArrayBase)
 CAST_ACCESSOR(Foreign)
+CAST_ACCESSOR(GlobalDictionary)
 CAST_ACCESSOR(GlobalObject)
 CAST_ACCESSOR(HandlerTable)
 CAST_ACCESSOR(HeapObject)
 CAST_ACCESSOR(JSArray)
 CAST_ACCESSOR(JSArrayBuffer)
 CAST_ACCESSOR(JSArrayBufferView)
 CAST_ACCESSOR(JSBuiltinsObject)
 CAST_ACCESSOR(JSDataView)
 CAST_ACCESSOR(JSDate)
 CAST_ACCESSOR(JSFunction)
@@ skipping 3329 matching lines @@
 }
 
 
 bool JSObject::HasIndexedInterceptor() {
   return map()->has_indexed_interceptor();
 }
 
 
 NameDictionary* JSObject::property_dictionary() {
   DCHECK(!HasFastProperties());
+  // TODO(ishell): Uncomment, once all property_dictionary() usages for global
+  // objects are replaced with global_dictionary().
+  // DCHECK(!IsGlobalObject());
   return NameDictionary::cast(properties());
 }
 
 
+GlobalDictionary* JSObject::global_dictionary() {
+  DCHECK(!HasFastProperties());
+  DCHECK(IsGlobalObject());
+  return GlobalDictionary::cast(properties());
+}
+
+
 SeededNumberDictionary* JSObject::element_dictionary() {
   DCHECK(HasDictionaryElements());
   return SeededNumberDictionary::cast(elements());
 }
 
 
 bool Name::IsHashFieldComputed(uint32_t field) {
   return (field & kHashNotComputedMask) == 0;
 }
 
@@ skipping 893 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_