void ThreadLocalAllocBuffer::initialize(HeapWord* start,
                                        HeapWord* top,
                                        HeapWord* end) {

  {- -------------------------------------------
  (1) フィールドの初期化
      ---------------------------------------- -}

      set_start(start);
      set_top(top);
      set_pf_top(top);
      set_end(end);

  {- -------------------------------------------
  (1) (assert) (See: ThreadLocalAllocBuffer::invariants())
      ---------------------------------------- -}

      invariants();
    }