--- old/src/share/vm/memory/gcLocker.hpp	2014-02-07 17:50:16.902298765 +0100
+++ new/src/share/vm/memory/gcLocker.hpp	2014-02-07 17:50:16.806299435 +0100
@@ -91,7 +91,8 @@
     assert(SafepointSynchronize::is_at_safepoint(), "only read at safepoint");
     return is_active_internal();
   }
-  static bool needs_gc()       { return _needs_gc;                        }
+  static bool needs_gc()   { return _needs_gc; }
+  static bool fail_on_gc() { return _lock_count > 0; }
 
   // Shorthand
   static bool is_active_and_needs_gc() {