Re: [PATCH] gitlab-ci: Use -fno-sanitize=function in the clang-user job

["Daniel P. Berrangé" <berrange@redhat.com>]

On Wed, Jul 24, 2024 at 09:25:42AM +1000, Richard Henderson wrote:
> With -fsanitize=undefined, which implies -fsanitize=function,
> clang will add a "type signature" before functions.
> It accesses funcptr-8 and funcptr-4 to do so.
> 
> The generated TCG prologue is directly on a page boundary,
> so these accesses segfault.
> 
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> 
> Does anyone know why we're using --extra-cflags for the clang-user
> and clang-system jobs, as opposed to --enable-sanitizers?  It
> certainly seems like regular users who use the normal configure
> flag are going to run into this as well.
> 
> Anyway, this is why the clang-user job is failing at the momemnt.
> I can only assume that changes to our docker file, or upstream
> distro updates have pulled in a new compiler version, because this
> wasn't failing in this way last week.

Logs show the clang version didn't change, but it is possible the
libubsan.so package changed, but we can't see package versions.

I've sent a series that will make it easier to compare pacakge
versions between new & historical jobs in future situations like
this:

  https://lists.nongnu.org/archive/html/qemu-devel/2024-07/msg05749.html


With regards,
Daniel
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