[Isolates] Pass current isolate address to the regexp native functions

src/objects-inl.h

 // Copyright 2006-2008 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 1058 matching lines @@
 Heap* HeapObject::GetHeap() {
   // During GC, the map pointer in HeapObject is used in various ways that
   // prevent us from retrieving Heap from the map.
   // Assert that we are not in GC, implement GC code in a way that it doesn't
   // pull heap from the map.
   ASSERT(HEAP->is_safe_to_read_maps());
   return map()->heap();
 }
 
 
+Isolate* HeapObject::GetIsolate() {
+  Isolate* i = GetHeap()->isolate();
+  ASSERT(i == Isolate::Current());
+  return i;
+}
+
+
 Map* HeapObject::map() {
   return map_word().ToMap();
 }
 
 
 void HeapObject::set_map(Map* value) {
   set_map_word(MapWord::FromMap(value));
 }
 
 
@@ skipping 2471 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_