173   virtual bool is_alive() const                  = 0;

   173   virtual bool is_alive() const                  = 0;

   174   virtual void do_unloading(BoolObjectClosure* is_alive,

   174   virtual void do_unloading(BoolObjectClosure* is_alive,

   175                             OopClosure* keep_alive,

   175                             OopClosure* keep_alive,

   176                             bool unloading_occurred);

   176                             bool unloading_occurred);

   177   virtual void oops_do(OopClosure* f) = 0;

   177   virtual void oops_do(OopClosure* f) = 0;

   178 

   180 

   179   // OopMap for frame

   181   // OopMap for frame

   180   OopMapSet* oop_maps() const                    { return _oop_maps; }

   182   OopMapSet* oop_maps() const                    { return _oop_maps; }

   181   void set_oop_maps(OopMapSet* p);

   183   void set_oop_maps(OopMapSet* p);

   182   OopMap* oop_map_for_return_address(address return_address);

   184   OopMap* oop_map_for_return_address(address return_address);