src/hotspot/share/runtime/mutexLocker.cpp

rev 53868 : imported patch remove_shared_satb_lock

*** 77,87 ****
  Mutex*   NonJavaThreadsList_lock      = NULL;
  Monitor* CGC_lock                     = NULL;
  Monitor* STS_lock                     = NULL;
  Monitor* FullGCCount_lock             = NULL;
  Monitor* SATB_Q_CBL_mon               = NULL;
- Mutex*   Shared_SATB_Q_lock           = NULL;
  Monitor* DirtyCardQ_CBL_mon           = NULL;
  Mutex*   Shared_DirtyCardQ_lock       = NULL;
  Mutex*   MarkStackFreeList_lock       = NULL;
  Mutex*   MarkStackChunkList_lock      = NULL;
  Mutex*   MonitoringSupport_lock       = NULL;
--- 77,86 ----
*** 210,220 ****
    if (UseConcMarkSweepGC || UseG1GC) {
      def(FullGCCount_lock           , PaddedMonitor, leaf,        true,  Monitor::_safepoint_check_never);      // in support of ExplicitGCInvokesConcurrent
    }
    if (UseG1GC) {
      def(SATB_Q_CBL_mon             , PaddedMonitor, access,      true,  Monitor::_safepoint_check_never);
-     def(Shared_SATB_Q_lock         , PaddedMutex  , access + 1,  true,  Monitor::_safepoint_check_never);
  
      def(DirtyCardQ_CBL_mon         , PaddedMonitor, access,      true,  Monitor::_safepoint_check_never);
      def(Shared_DirtyCardQ_lock     , PaddedMutex  , access + 1,  true,  Monitor::_safepoint_check_never);
  
      def(FreeList_lock              , PaddedMutex  , leaf     ,   true,  Monitor::_safepoint_check_never);
--- 209,218 ----
*** 229,239 ****
  
      def(MonitoringSupport_lock     , PaddedMutex  , native   ,   true,  Monitor::_safepoint_check_never);      // used for serviceability monitoring support
    }
    if (UseShenandoahGC) {
      def(SATB_Q_CBL_mon             , PaddedMonitor, access,      true,  Monitor::_safepoint_check_never);
-     def(Shared_SATB_Q_lock         , PaddedMutex  , access + 1,  true,  Monitor::_safepoint_check_never);
  
      def(StringDedupQueue_lock      , PaddedMonitor, leaf,        true,  Monitor::_safepoint_check_never);
      def(StringDedupTable_lock      , PaddedMutex  , leaf,        true,  Monitor::_safepoint_check_never);
    }
    def(ParGCRareEvent_lock          , PaddedMutex  , leaf     ,   true,  Monitor::_safepoint_check_sometimes);
--- 227,236 ----