src/hotspot/share/gc/z/zMark.hpp

concurrent root iterator

   bool is_initialized() const;
 
   template <bool finalizable, bool publish> void mark_object(uintptr_t addr);
 
   void start();
+  void mark_concurrent_roots();
   void mark();
   bool end();
 
   void flush_and_free();
   bool flush_and_free(Thread* thread);