void SafepointSynchronize::end_statistics(jlong vmop_end_time) {

  {- -------------------------------------------
  (1) _safepoint_stats[_cur_stat_index] 及び _max_vmop_time に入っている統計情報を更新する.
      また, 以下の条件が成り立てば, SafepointSynchronize::print_statistics() で統計情報を出力する.
      * #TODO
      * #TODO

      (なお, 必要があれば _cur_stat_index の値も更新しておく)
      ---------------------------------------- -}

      SafepointStats *spstat = &_safepoint_stats[_cur_stat_index];

      // Update the vm operation time.
      spstat->_time_to_exec_vmop = vmop_end_time -  cleanup_end_time;
      if (spstat->_time_to_exec_vmop > _max_vmop_time) {
        _max_vmop_time = spstat->_time_to_exec_vmop;
      }
      // Only the sync time longer than the specified
      // PrintSafepointStatisticsTimeout will be printed out right away.
      // By default, it is -1 meaning all samples will be put into the list.
      if ( PrintSafepointStatisticsTimeout > 0) {
        if (spstat->_time_to_sync > PrintSafepointStatisticsTimeout * MICROUNITS) {
          print_statistics();
        }
      } else {
        // The safepoint statistics will be printed out when the _safepoin_stats
        // array fills up.
        if (_cur_stat_index == PrintSafepointStatisticsCount - 1) {
          print_statistics();
          _cur_stat_index = 0;
        } else {
          _cur_stat_index++;
        }
      }
    }