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src/hotspot/share/gc/shared/barrierSet.hpp

Concurrent class unloading
   virtual void on_thread_detach(JavaThread* thread) {}
   virtual void make_parsable(JavaThread* thread) {}
 
   // nmethod entry barrier support
   virtual bool needs_nmethod_entry_barrier() const { return false; }
+  virtual int nmethod_entry_barrier_state() const { return 0; }
   virtual ByteSize nmethod_entry_barrier_state_thread_offset() const { return in_ByteSize(0); }
   virtual bool on_nmethod_entry_barrier(nmethod* nm, nmethodBarrier* nmbarrier);
 
 public:
   // Print a description of the memory for the barrier set
    
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