void initialize_all() {

  {- -------------------------------------------
  (1) 以下の関数を呼び出して初期化を行う.

      * G1CollectorPolicy::initialize_flags()
      * CollectorPolicy::initialize_size_info()
      * CollectorPolicy::initialize_perm_generation()
      ---------------------------------------- -}

        initialize_flags();
        initialize_size_info();
        initialize_perm_generation(PermGen::MarkSweepCompact);
      }