pthread_cancel async-signal-safe

[Adhemerval Zanella]

On 07/12/2020 10:06, Florian Weimer wrote:
> * Adhemerval Zanella:
> 
>> The pthread_cancel interoperability with C++ seems a heavy burden, but I'm
>> not sure which better options we do have here.
> 
> It's not just C++, it's needed for -fexception support in C and other
> languages.
> 
> Furthermore, the out-of-line DWARF unwinding tables can be made
> considerably safer than on-stack pointers used by the longjmp-based
> mechanism.

Do you mean for pthread_cleanup_push? I do agree, but I haven't check exactly
what need to be done to accomplish neither it if would be be possible to
accomplish for !_GNU case.  So do you think packing an unwinder on glibc
could be an improvement?  If so, which would be possible issues?