diff -r f9191297ce83 -r f8d1b560700e hotspot/src/share/vm/runtime/globals.hpp
--- a/hotspot/src/share/vm/runtime/globals.hpp	Tue Sep 28 09:51:37 2010 -0700
+++ b/hotspot/src/share/vm/runtime/globals.hpp	Tue Sep 28 15:56:15 2010 -0700
@@ -641,6 +641,9 @@
   develop(bool, ZapJNIHandleArea, trueInDebug,                              \
           "Zap freed JNI handle space with 0xFEFEFEFE")                     \
                                                                             \
+  notproduct(bool, ZapStackSegments, trueInDebug,                           \
+             "Zap allocated/freed Stack segments with 0xFADFADED")          \
+                                                                            \
   develop(bool, ZapUnusedHeapArea, trueInDebug,                             \
           "Zap unused heap space with 0xBAADBABE")                          \
                                                                             \