src/hotspot/share/gc/shenandoah/shenandoahLock.hpp

*** 40,10 ***
--- 40,12 ---
    Thread* volatile _owner;
    shenandoah_padding(2);
  
    template<bool ALLOW_BLOCK>
    void contended_lock_internal(JavaThread* java_thread);
+   static void yield_or_sleep(int &yields);
+ 
  public:
    ShenandoahLock() : _state(unlocked), _owner(nullptr) {};
  
    void lock(bool allow_block_for_safepoint) {
      assert(Atomic::load(&_owner) != Thread::current(), "reentrant locking attempt, would deadlock");