Calling other functions while concurrently calling exit?

[Ondřej Bílka]

On Sat, Sep 19, 2015 at 08:48:21AM +0200, Andreas Schwab wrote:
> "Carlos O'Donell" <carlos@redhat.com> writes:
> 
> > Is it spelled out anywhere in POSIX or ISO C that calling
> > other functions concurrently with exit is going to result
> > in undefined behaviour?
> 
> exit must be thread-safe, except that calling it more than once is
> undefined.
> 
Wait, we don't do sane thing and first cancel all other threads before doing anything?

How otherwise we would run tls destructors in context of correct thread?