diff -r e2eff4dcebbd -r b5023063346d src/hotspot/share/runtime/mutexLocker.cpp
--- a/src/hotspot/share/runtime/mutexLocker.cpp	Wed May 16 10:27:25 2018 -0700
+++ b/src/hotspot/share/runtime/mutexLocker.cpp	Tue May 15 14:49:10 2018 -0700
@@ -39,6 +39,7 @@
 
 Mutex*   Patching_lock                = NULL;
 Monitor* SystemDictionary_lock        = NULL;
+Mutex*   SharedDictionary_lock        = NULL;
 Mutex*   Module_lock                  = NULL;
 Mutex*   CompiledIC_lock              = NULL;
 Mutex*   InlineCacheBuffer_lock       = NULL;
@@ -221,6 +222,7 @@
   def(JmethodIdCreation_lock       , PaddedMutex  , leaf,        true,  Monitor::_safepoint_check_always);     // used for creating jmethodIDs.
 
   def(SystemDictionary_lock        , PaddedMonitor, leaf,        true,  Monitor::_safepoint_check_always);     // lookups done by VM thread
+  def(SharedDictionary_lock        , PaddedMutex,   leaf,        true,  Monitor::_safepoint_check_always);     // lookups done by VM thread
   def(Module_lock                  , PaddedMutex  , leaf+2,      true,  Monitor::_safepoint_check_always);
   def(InlineCacheBuffer_lock       , PaddedMutex  , leaf,        true,  Monitor::_safepoint_check_always);
   def(VMStatistic_lock             , PaddedMutex  , leaf,        false, Monitor::_safepoint_check_always);