--- a/src/hotspot/share/runtime/mutexLocker.cpp	Thu Feb 21 17:50:27 2019 -0800
+++ b/src/hotspot/share/runtime/mutexLocker.cpp	Thu Feb 21 17:07:35 2019 -0800
@@ -150,6 +150,9 @@
 #if INCLUDE_NMT
 Mutex*   NMTQuery_lock                = NULL;
 #endif
+#if INCLUDE_CDS && INCLUDE_JVMTI
+Mutex*   CDSClassFileStream_lock      = NULL;
+#endif
 
 #define MAX_NUM_MUTEX 128
 static Monitor * _mutex_array[MAX_NUM_MUTEX];
@@ -339,6 +342,9 @@
 #if INCLUDE_NMT
   def(NMTQuery_lock                , PaddedMutex  , max_nonleaf, false, Monitor::_safepoint_check_always);
 #endif
+#if INCLUDE_CDS && INCLUDE_JVMTI
+  def(CDSClassFileStream_lock      , PaddedMutex  , max_nonleaf, false, Monitor::_safepoint_check_always);
+#endif
 }
 
 GCMutexLocker::GCMutexLocker(Monitor * mutex) {