void GCTaskThread::print_task_time_stamps() {

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

      assert(PrintGCTaskTimeStamps, "Sanity");
      assert(_time_stamps != NULL, "Sanity (Probably set PrintGCTaskTimeStamps late)");

  {- -------------------------------------------
  (1) (トレース出力)
      (_time_stamp_index 個の GCTaskTimeStamp が溜まっているはずなので, 
       それを全て出力) (See: GCTaskTimeStamp)
      ---------------------------------------- -}

      tty->print_cr("GC-Thread %u entries: %d", id(), _time_stamp_index);
      for(uint i=0; i<_time_stamp_index; i++) {
        GCTaskTimeStamp* time_stamp = time_stamp_at(i);
        tty->print_cr("\t[ %s " INT64_FORMAT " " INT64_FORMAT " ]",
                      time_stamp->name(),
                      time_stamp->entry_time(),
                      time_stamp->exit_time());
      }

  {- -------------------------------------------
  (1) _time_stamp_index フィールドの値を 0 に戻しておく.
      ---------------------------------------- -}

      // Reset after dumping the data
      _time_stamp_index = 0;
    }