Bug: Synchronous signals broken on Cygwin 64

Houder houder@xs4all.nl
Thu Apr 26 11:02:00 GMT 2018

On Thu, 26 Apr 2018 12:52:54, Thomas Zimmermann wrote:

> Hi
> Am 26.04.2018 um 12:45 schrieb Houder:
> >> The expected behavior is that an installed signal handler runs exactly
> >> once for a signal and the OS terminates the program if the handler
> >> returns. This works on 32-bit Cygwin. From my observation, Cygwin 64
> >> differs in the follow ways:
> >=20
> > .. uhm, unless SA_RESETHAND (sa_flags) has been specified, I expect the
> > handler to be invoked again and again ...
> What I mean is that the installed signal handler is re-called constantly
> for the same HW exception (div-by-zero in this case). It is as if
> there's an endless loop around the signal-handler function.

After the invocation of the handler, the program continues with the code
that attempts 'to divide by zero'.

As result of that, the handler is invoked again.


> Best regards
> Thomas

Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

More information about the Cygwin mailing list