[gmx-developers] glibc qsort bug crashing mdrun

[Alexey Shvetsov]

Hi,

What versions of glibc has this bug?
I didnt see any crashed with threaded mdrun version with glibc-2.11.x
on x86_64 (both with gcc-4.4 and gcc-4.5)

2010/6/21 Berk Hess <hess at cbr.su.se>:
> Hi,
>
> I just discovered that there is a bug in qsort in glibc that makes it
> non thread safe.
> So mdrun with the GMX thread library could crash randomly. This occured
> very seldomly.
> We have one system that we managed to crash with certain compiler
> settings in 1% of the runs.
> This could explain some crashes people have experienced (gcc 4.1 is
> another danger).
> I have now replaced qsort by our own qsort in case we use threads.
>
> Berk
>
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-- 
Best Regards,
Alexey 'Alexxy' Shvetsov
Petersburg Nuclear Physics Institute, Russia
Department of Molecular and Radiation Biophysics
Gentoo Team Ru
Gentoo Linux Dev
mailto:alexxyum at gmail.com
mailto:alexxy at gentoo.org
mailto:alexxy at omrb.pnpi.spb.ru