perform

# File lib/drb/drb.rb, line 1565
      def perform
        @result = nil
        @succ = false
        setup_message

        if $SAFE < @safe_level
          info = Thread.current['DRb']
          if @block
            @result = Thread.new do
              Thread.current['DRb'] = info
              prev_safe_level = $SAFE
              $SAFE = @safe_level
              perform_with_block
            ensure
              $SAFE = prev_safe_level
            end.value
          else
            @result = Thread.new do
              Thread.current['DRb'] = info
              prev_safe_level = $SAFE
              $SAFE = @safe_level
              perform_without_block
            ensure
              $SAFE = prev_safe_level
            end.value
          end
        else
          if @block
            @result = perform_with_block
          else
            @result = perform_without_block
          end
        end
        @succ = true
        if @msg_id == :to_ary && @result.class == Array
          @result = DRbArray.new(@result)
        end
        return @succ, @result
      rescue StandardError, ScriptError, Interrupt
        @result = $!
        return @succ, @result
      end