--- old/agent/src/share/classes/sun/jvm/hotspot/oops/Instance.java	Tue Mar 29 13:56:33 2011
+++ new/agent/src/share/classes/sun/jvm/hotspot/oops/Instance.java	Tue Mar 29 13:56:33 2011
@@ -64,7 +64,7 @@
 
   public void iterateFields(OopVisitor visitor, boolean doVMFields) {
     super.iterateFields(visitor, doVMFields);
-    ((InstanceKlass) getKlass()).iterateNonStaticFields(visitor);
+    ((InstanceKlass) getKlass()).iterateNonStaticFields(visitor, this);
   }
 
   public void printValueOn(PrintStream tty) {