diff -r 4f25538b54c9 -r 94ec88ca68e2 src/share/vm/runtime/mutexLocker.hpp
--- a/src/share/vm/runtime/mutexLocker.hpp	Mon Jan 09 10:27:24 2012 +0100
+++ b/src/share/vm/runtime/mutexLocker.hpp	Wed Jan 11 17:34:02 2012 -0500
@@ -135,6 +135,12 @@
 
 extern Mutex*   Management_lock;                 // a lock used to serialize JVM management
 extern Monitor* Service_lock;                    // a lock used for service thread operation
+extern Mutex*   Stacktrace_lock;                 // used to guard access to the stacktrace table
+
+extern Monitor* JfrQuery_lock;                   // protects JFR use
+extern Monitor* JfrMsg_lock;                     // protects JFR messaging
+extern Mutex*   JfrBuffer_lock;                  // protects JFR buffer operations
+extern Mutex*   JfrStream_lock;                  // protects JFR stream access
 
 // A MutexLocker provides mutual exclusion with respect to a given mutex
 // for the scope which contains the locker.  The lock is an OS lock, not