diff -r 6cf2530f7fd3 -r 16fb9f942703 src/share/vm/oops/klass.cpp
--- a/src/share/vm/oops/klass.cpp	Thu Jan 24 23:30:45 2013 -0800
+++ b/src/share/vm/oops/klass.cpp	Fri Jan 25 15:06:18 2013 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2013, 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
@@ -29,6 +29,7 @@
 #include "classfile/vmSymbols.hpp"
 #include "gc_implementation/shared/markSweep.inline.hpp"
 #include "gc_interface/collectedHeap.inline.hpp"
+#include "memory/heapInspection.hpp"
 #include "memory/metadataFactory.hpp"
 #include "memory/oopFactory.hpp"
 #include "memory/resourceArea.hpp"
@@ -624,6 +625,17 @@
   obj->print_address_on(st);
 }
 
+#if INCLUDE_SERVICES
+// Size Statistics
+void Klass::collect_statistics(KlassSizeStats *sz) const {
+  sz->_klass_bytes = sz->count(this);
+  sz->_mirror_bytes = sz->count(java_mirror());
+  sz->_secondary_supers_bytes = sz->count_array(secondary_supers());
+
+  sz->_ro_bytes += sz->_secondary_supers_bytes;
+  sz->_rw_bytes += sz->_klass_bytes + sz->_mirror_bytes;
+}
+#endif // INCLUDE_SERVICES
 
 // Verification