Bug: Synchronous signals broken on Cygwin 64

[Thomas Zimmermann]

I just saw that the result after returning from a synchronous signal is
undefined. So any behavior seems be OK. I'd still encourage to unify the
behavior of 32-bit and 64-bit code. (See my other mail.)

Best regards
Thomas

Am 26.04.2018 um 13:01 schrieb Houder:
> 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.
> 
> Henri
> 
>> 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
> 


-- 
Implement thread-safe and fault-tolerant software in C: visit picotm.org
--
GnuPG:          http://tdz.users.sourceforge.net/tdz.asc
Fingerprint:    16FF F599 82F8 E5AA 18C6 5220 D9DA D7D4 4EF1 DF08
Website:        tzimmermann.org

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 195 bytes
Desc: OpenPGP digital signature
URL: <http://cygwin.com/pipermail/cygwin/attachments/20180426/4856290e/attachment.sig>