diff -r e7d5557ad624 -r 0316eac49d5a src/share/vm/runtime/globals.hpp
--- a/src/share/vm/runtime/globals.hpp	Thu Jul 02 16:28:15 2009 -0700
+++ b/src/share/vm/runtime/globals.hpp	Tue Jul 07 14:23:00 2009 -0400
@@ -1994,6 +1994,10 @@
   product_rw(bool, PrintHeapAtGC, false,                                    \
           "Print heap layout before and after each GC")                     \
                                                                             \
+  product_rw(bool, PrintHeapAtGCExtended, false,                            \
+          "Prints extended information about the layout of the heap "       \
+          "when -XX:+PrintHeapAtGC is set")                                 \
+                                                                            \
   product(bool, PrintHeapAtSIGBREAK, true,                                  \
           "Print heap layout in response to SIGBREAK")                      \
                                                                             \