Re: [PATCH] test-skeleton.c: Do not enable M_PERTURB

[Mike Frysinger <vapier at gentoo dot org>]

On 23 Jun 2016 19:25, Florian Weimer wrote:
> On 06/23/2016 07:16 PM, Siddhesh Poyarekar wrote:
> > On Thu, Jun 23, 2016 at 12:57:17PM -0400, Zack Weinberg wrote:
> >> Is there a well-documented way to run the tests under valgrind?
> >
> > I don't think so, but it ought to be sufficient to run valgrind
> > --trace-children=yes for all of make check.  Dead slow, but I don't
> > see why it shouldn't work.
> >
> > Maybe this is a good candidate for enhancement in glibc to allow
> > running individual tests under valgrind, something like
> > 'make valgrind-check'.
> 
> Running tests under valgrind is one thing.  Interpreting the errors is 
> another.
> 
> On some architectures, running valgrind on a non-installed libc gives 
> rather poor results.  Some versions do not recognize malloc as such, and 
> on some architectures, the suppression files are inactive because the 
> libc paths do not match the hard-coded expectations of valgrind.

not only that, but valgrind frequently needs to be updated whenever a new
glibc release is made (to tweak internal false positives).  if we tried to
use that against git master, i'm afraid it'd always be broken.
-mike

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