--- old/src/share/vm/runtime/virtualspace.hpp	2012-11-27 15:19:59.326936641 -0800
+++ new/src/share/vm/runtime/virtualspace.hpp	2012-11-27 15:19:59.115409610 -0800
@@ -75,6 +75,10 @@
 
  public:
   // Constructor
+  ReservedSpace() :
+    _base(NULL), _size(0), _noaccess_prefix(0), _alignment(0),
+    _special(false), _executable(false) {}
+
   ReservedSpace(size_t size);
   ReservedSpace(size_t size, size_t alignment, bool large,
                 char* requested_address = NULL,