Stack unwinding requirements

[Florian Weimer]

On 05/15/2017 01:36 PM, Joseph Myers wrote:

> See <https://sourceware.org/ml/libc-alpha/2015-10/msg00569.html> and
> followups for discussion of the circumstances when those options may be
> needed.

Interesting.  So the C frontend can actually generate code which invokes 
the personality routine (via the cleanup attribute).

I wonder if we can use this to make cancellation safer, at least within 
glibc.

Florian