Re: [PATCH] libio: Add small optimization on fmemopen

[Florian Weimer <fweimer at redhat dot com>]

On 09/21/2016 08:43 PM, Paul Eggert wrote:
> On 09/21/2016 11:26 AM, Adhemerval Zanella wrote:
> > my idea to use this workaround is
> > to avoid possible issues with faulty compilers.
>
> That's my thought as well. Although we can argue that the C standard,
> GCC, valgrind, etc. are all faulty, possibly the C standard etc. won't
> change (after all, there is a performance advantage to GCC's current
> behavior) and our code would continue to be over the edge.

We don't know the nature of the GCC issue, so we cannot work around it 
reliably.  The most likely explanation is that Address Sanitizer does 
not account for a valid GCC optimization.

Florian