diff -r 5b6512efcdc4 -r 6337ca4dcad8 src/share/vm/runtime/mutexLocker.cpp
--- a/src/share/vm/runtime/mutexLocker.cpp	Fri Apr 19 16:51:27 2013 -0700
+++ b/src/share/vm/runtime/mutexLocker.cpp	Sat Apr 20 04:07:08 2013 -0700
@@ -46,6 +46,7 @@
 Mutex*   JNIGlobalHandle_lock         = NULL;
 Mutex*   JNIHandleBlockFreeList_lock  = NULL;
 Mutex*   JNICachedItableIndex_lock    = NULL;
+Mutex*   MemberNameTable_lock         = NULL;
 Mutex*   JmethodIdCreation_lock       = NULL;
 Mutex*   JfieldIdCreation_lock        = NULL;
 Monitor* JNICritical_lock             = NULL;
@@ -252,6 +253,7 @@
   def(Heap_lock                    , Monitor, nonleaf+1,   false);
   def(JfieldIdCreation_lock        , Mutex  , nonleaf+1,   true ); // jfieldID, Used in VM_Operation
   def(JNICachedItableIndex_lock    , Mutex  , nonleaf+1,   false); // Used to cache an itable index during JNI invoke
+  def(MemberNameTable_lock         , Mutex  , nonleaf+1,   false); // Used to protect MemberNameTable
 
   def(CompiledIC_lock              , Mutex  , nonleaf+2,   false); // locks VtableStubs_lock, InlineCacheBuffer_lock
   def(CompileTaskAlloc_lock        , Mutex  , nonleaf+2,   true );