[PATCH v2] Improve test coverage of strlen function

[H.J. Lu]

On Mon, May 31, 2021 at 8:59 AM Sunil K Pandey <skpgkp2@gmail.com> wrote:
>
> This patch covers following conditions.

"the following conditions:"

> - String starts with different alignments and ends at the page boundary
Strings start ... and end
>   with less than 64 byte length.
> - String starts with different alignments and cross page boundary with
 Strings starts
>   fixed length.
> ---
>  string/test-strlen.c | 15 ++++++++++++++-
>  1 file changed, 14 insertions(+), 1 deletion(-)
>
> diff --git a/string/test-strlen.c b/string/test-strlen.c
> index 6e67d1f1f1..c9a7afb339 100644
> --- a/string/test-strlen.c
> +++ b/string/test-strlen.c
> @@ -79,7 +79,7 @@ do_test (size_t align, size_t len)
>  {
>    size_t i;
>
> -  align &= 63;
> +  align &= (getpagesize () / sizeof (CHAR)) - 1;
>    if (align + sizeof (CHAR) * len >= page_size)
>      return;
>
> @@ -160,6 +160,19 @@ test_main (void)
>        do_test (sizeof (CHAR) * i, (size_t)((1 << i) / 1.5));
>      }
>
> +  /* Test strings near page boundary */
> +
> +  size_t maxlength = 64 / sizeof (CHAR) - 1;
> +  size_t pagesize = getpagesize () / sizeof (CHAR);
> +
> +  for (i = maxlength ; i > 1; --i)
> +    {
> +      /* String stays on the same page.  */
> +      do_test (pagesize - i, i - 1);
> +      /* String crosses page boundary.  */
> +      do_test (pagesize - i, maxlength);
> +    }
> +
>    do_random_tests ();
>    return ret;
>  }
> --
> 2.31.1
>


-- 
H.J.