src/share/vm/oops/klass.cpp

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -657,10 +657,14 @@
 void Klass::oop_verify_on(oop obj, outputStream* st) {
   guarantee(obj->is_oop(),  "should be oop");
   guarantee(obj->klass()->is_klass(), "klass field is not a klass");
 }
 
+ByteSize Klass::vtable_start_offset() {
+  return in_ByteSize(InstanceKlass::header_size() * wordSize);
+}
+
 #ifndef PRODUCT
 
 bool Klass::verify_vtable_index(int i) {
   int limit = vtable_length()/vtableEntry::size();
   assert(i >= 0 && i < limit, "index %d out of bounds %d", i, limit);