Async cacellation and pthread_cleanup_push

[Petr Vorel]

Hi all,

> * Andreas Schwab:

> > On Aug 04 2021, Florian Weimer wrote:

> >> * Andreas Schwab:

> >>> Is pthread_cleanup_push supposed to work together with async
> >>> cancellation?

> >> In our implementation?  I think so.

> > I don't see how that can work with -fexceptions or in C++, though.  Is
> > that supported?

> I think it is supposed to work, but it probably is unreliable.

> >> POSIX doesn't require it, though.

> > Chapter and verse?

> 2.9.5 Thread Cancellation, Thread Cancellation Cleanup Handlers and
> Async-Cancel Safety.  The first section calls pthread_cleanup_push a
> function, the second section does not list it.

> > Then the LTP test is INVALID.

> Which test?  It could be a test for Linux extension.

FYI tests in testcases/open_posix_testsuite/ are POSIX tests
(not Linux specific).

Kind regards,
Petr

> Thanks,
> Florian