template <class T> inline void MarkSweep::adjust_pointer(T* p, bool isroot) {

  {- -------------------------------------------
  (1) 処理対象のオブジェクト(以下の p)が NULL でなければ, 
      コンパクション先のアドレス(以下の new_obj)を取得し, 
      oopDesc::encode_store_heap_oop_not_null() で
      処理対象のポインタ(p)をコピー先のアドレスに書き換える.
      ---------------------------------------- -}

      T heap_oop = oopDesc::load_heap_oop(p);
      if (!oopDesc::is_null(heap_oop)) {
        oop obj     = oopDesc::decode_heap_oop_not_null(heap_oop);
        oop new_obj = oop(obj->mark()->decode_pointer());
        assert(new_obj != NULL ||                         // is forwarding ptr?
               obj->mark() == markOopDesc::prototype() || // not gc marked?
               (UseBiasedLocking && obj->mark()->has_bias_pattern()) ||
                                                          // not gc marked?
               obj->is_shared(),                          // never forwarded?
               "should be forwarded");
        if (new_obj != NULL) {
          assert(Universe::heap()->is_in_reserved(new_obj),
                 "should be in object space");
          oopDesc::encode_store_heap_oop_not_null(p, new_obj);
        }
      }

  {- -------------------------------------------
  (1) (verify)
      ---------------------------------------- -}

      VALIDATE_MARK_SWEEP_ONLY(track_adjusted_pointer(p, isroot));
    }