void SignatureHandlerLibrary::initialize() {

  {- -------------------------------------------
  (1) 既に初期化済みであれば, 何もする必要が無いのでここでリターン.
      ---------------------------------------- -}

      if (_fingerprints != NULL) {
        return;
      }

  {- -------------------------------------------
  (1) SignatureHandlerLibrary 内のフィールドの初期化処理.
      ---------------------------------------- -}

      if (set_handler_blob() == NULL) {
        vm_exit_out_of_memory(blob_size, "native signature handlers");
      }

      BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
                                          SignatureHandlerLibrary::buffer_size);
      _buffer = bb->code_begin();

      _fingerprints = new(ResourceObj::C_HEAP)GrowableArray<uint64_t>(32, true);
      _handlers     = new(ResourceObj::C_HEAP)GrowableArray<address>(32, true);
    }