--- a/src/share/vm/runtime/sharedRuntime.hpp	Fri Feb 24 18:30:42 2012 -0800
+++ b/src/share/vm/runtime/sharedRuntime.hpp	Mon Feb 27 13:10:13 2012 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -463,6 +463,9 @@
                                           VMRegPair *regs,
                                           BasicType ret_type );
 
+  // Block before entering a JNI critical method
+  static void block_for_jni_critical(JavaThread* thread);
+
 #ifdef HAVE_DTRACE_H
   // Generate a dtrace wrapper for a given method.  The method takes arguments
   // in the Java compiled code convention, marshals them to the native