On Thu, Jan 04, 2018 at 09:36:27PM -0800, John Reiser wrote: > 2) The explicit write by the stack probe can mask a memcheck(valgrind) > violation, at least until memcheck groks the probe.
That should not be true. The probe is done after the stack pointer is lowered, so memcheck/valgrind knows that memory is used. If the probe is done below the actual stack pointer that would be a bug in the gcc -fstack-protector implementation. Please do report such issues when you encounter them. There were indeed such bugs in the past on some architectures (especially in combination with no-return functions), but I believe they have all been fixed now. Thanks, Mark _______________________________________________ devel mailing list -- devel@lists.fedoraproject.org To unsubscribe send an email to devel-le...@lists.fedoraproject.org
