Hi, Max

sorry for a delayed answer.

LGTM with a minor comment

 

> +end
> +
> +res, err = misc.sysprof.stop()
> +assert(res, err)
> +
> +test:ok(true, 'sysprof finished successfully')

I propose to reflect a goal of the test in a test description. Please add something about ffunc to description.

The test is not about whole sysprof, but about ffunc support in sysprof.

> +
> +os.exit(test:check() and 0 or 1)