On Fri, Nov 27, 2020 at 6:47 AM <tlaro...@polynum.com> wrote: > ... > Concerning the core dumps, there is another thing to look at: > _FORTIFY_SOURCE. There are checks about the use of strings functions > that can cause an abort even if the actual use is probably, with > a classic C implementation, safe---I hit it with a strcpy() that was > removing a prefix simply shifting bytes left in a buffer; it didn't > cause any harm before 9.* and now aborts because src and dst overlap.
Off-topic, but that's undefined behavior. You should use memmove in the case when src and dest overlap. It is also easy to find a lot of undefined behavior. Just use -fsanitize=undefined. Jeff
