template <class T> void do_oop_work(T* p) {

  {- -------------------------------------------
  (1) (assert)
      ---------------------------------------- -}

        assert( _g1h->is_in_g1_reserved((HeapWord*) p), "invariant");
        assert(!_g1h->is_on_master_free_list(
                        _g1h->heap_region_containing((HeapWord*) p)), "invariant");

  {- -------------------------------------------
  (1) (変数宣言など)
      ---------------------------------------- -}

        oop obj = oopDesc::load_decode_heap_oop(p);

  {- -------------------------------------------
  (1) (トレース出力)
      ---------------------------------------- -}

        if (_cm->verbose_high())
          gclog_or_tty->print_cr("[%d] we're looking at location "
                                 "*"PTR_FORMAT" = "PTR_FORMAT,
                                 _task->task_id(), p, (void*) obj);

  {- -------------------------------------------
  (1) CMTask::deal_with_reference() を呼び出して処理を行う.
      ---------------------------------------- -}

        _task->deal_with_reference(obj);
      }