Re: [Valgrind-developers] valgrind/coregrind

[Tom H. <th...@cy...>]

In message <107...@sp...>
          Robert Walsh <rj...@du...> wrote:

> > On that point, anybody planning to attack this should check what
> > alignment glibc uses on x86-64 as it have to return 16 byte aligned
> > pointers due to the use of SSE for floating point values. It would
> > be a bit silly to rework it for 8 buyte alignment and then find we
> > need 16 byte alignment ;-)
> 
> On one of our Opteron boxes, I spotted this in the posix_memalign() man
> page:
> 
>        GNU  libc  malloc()  always returns 8-byte aligned memory
>        addresses, so these routines are only needed if you require
>        larger alignment  values.

Yep. I had a look at glibc and as far as I can see it only does 8 byte
alignment, even on x86-64.

Tom

-- 
Tom Hughes (th...@cy...)
Software Engineer, Cyberscience Corporation
http://www.cyberscience.com/