--- a/hotspot/src/cpu/x86/vm/assembler_x86.hpp	Mon Jul 26 15:58:07 2010 -0700
+++ b/hotspot/src/cpu/x86/vm/assembler_x86.hpp	Fri Jul 30 10:21:15 2010 -0700
@@ -1714,6 +1714,9 @@
 
   // if heap base register is used - reinit it with the correct value
   void reinit_heapbase();
+
+  DEBUG_ONLY(void verify_heapbase(const char* msg);)
+
 #endif // _LP64
 
   // Int division/remainder for Java