--- old/agent/src/share/classes/sun/jvm/hotspot/runtime/JavaThread.java	Wed Mar 13 23:31:49 2013
+++ new/agent/src/share/classes/sun/jvm/hotspot/runtime/JavaThread.java	Wed Mar 13 23:31:49 2013
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 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
@@ -320,6 +320,10 @@
     return stackBaseField.getValue(addr);
   }
 
+  public long getStackBaseValue() {
+    return VM.getVM().getAddressValue(getStackBase());
+  }
+
   public long getStackSize() {
     return stackSizeField.getValue(addr);
   }