*** old/src/hotspot/share/runtime/mutexLocker.cpp	Thu Mar 28 11:23:18 2019
--- new/src/hotspot/share/runtime/mutexLocker.cpp	Thu Mar 28 11:23:17 2019

*** 153,162 ****
--- 153,167 ----
  #endif
  #if INCLUDE_CDS && INCLUDE_JVMTI
  Mutex*   CDSClassFileStream_lock      = NULL;
  #endif
  
+ #if INCLUDE_JVMCI
+ Monitor* JVMCI_lock                   = NULL;
+ #endif
+ 
+ 
  #define MAX_NUM_MUTEX 128
  static Monitor * _mutex_array[MAX_NUM_MUTEX];
  static int _num_mutex;
  
  #ifdef ASSERT

*** 344,353 ****
--- 349,362 ----
    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
+ 
+ #if INCLUDE_JVMCI
+   def(JVMCI_lock                   , PaddedMonitor, nonleaf+2,   true,  Monitor::_safepoint_check_always);
+ #endif
  }
  
  GCMutexLocker::GCMutexLocker(Monitor * mutex) {
    if (SafepointSynchronize::is_at_safepoint()) {
      _locked = false;