PATCH: Add tst-mallocalign1

[H.J. Lu]

On Thu, May 17, 2012 at 8:11 AM, Carlos O'Donell
<carlos@systemhalted.org> wrote:
> On Thu, May 17, 2012 at 10:39 AM, H.J. Lu <hongjiu.lu@intel.com> wrote:
>> Hi,
>>
>> This patch adds tst-mallocalign1 to test malloc alignment.  Tested on
>> Linux/x86-64.  OK to install?
>>
>> Thanks.
>>
>>
>> H.J.
>> ---
>>        * sysdeps/x86_64/Makefile (tests): Add tst-mallocalign1.
>>        * sysdeps/x86_64/tst-mallocalign1.c: New file.
>
> This looks good to me.
>
> I trust you know the psABI requirement, so I didn't double check that.
>
> I figure that if malloc/malloc.c (MALLOC_ALIGNMENT) changes to be
> below the requirement that this test would trigger a regression?

Yes.

> At present we have ((2 * sizeof(size_t)) - 1) which should be (16 - 1)
> and meet the required minimum.
>
> Does that make sense?

Since size_t is 4 bytes and malloc alignment is 16 for x32, this test
is to make sure that we get it right for x32.


-- 
H.J.