--- a/hotspot/src/share/vm/runtime/os.hpp	Thu Mar 11 14:41:29 2010 -0500
+++ b/hotspot/src/share/vm/runtime/os.hpp	Fri Mar 12 10:42:16 2010 -0500
@@ -218,6 +218,9 @@
 
   static bool   guard_memory(char* addr, size_t bytes);
   static bool   unguard_memory(char* addr, size_t bytes);
+  static bool   create_stack_guard_pages(char* addr, size_t bytes);
+  static bool   remove_stack_guard_pages(char* addr, size_t bytes);
+
   static char*  map_memory(int fd, const char* file_name, size_t file_offset,
                            char *addr, size_t bytes, bool read_only = false,
                            bool allow_exec = false);