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Subject:	Re: Bug: Synchronous signals broken on Cygwin 64
To:	cygwin AT cygwin DOT com
References:	<bc993d03-a9ac-d1c9-c33a-03cfc810edbe AT users DOT sourceforge DOT net> <d76cfa4797d30702799a93892d454d95 AT smtp-cloud9 DOT xs4all DOT net>
From:	Thomas Zimmermann <tdz AT users DOT sourceforge DOT net>
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Message-ID:	<4a3b47db-fcdb-85f0-ec80-4cffcb7c495a@users.sourceforge.net>
Date:	Thu, 26 Apr 2018 12:52:54 +0200
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From: Thomas Zimmermann <tdz AT users DOT sourceforge DOT net>
To: cygwin AT cygwin DOT com
Message-ID: <4a3b47db-fcdb-85f0-ec80-4cffcb7c495a AT users DOT sourceforge DOT net>
Subject: Re: Bug: Synchronous signals broken on Cygwin 64
References: <bc993d03-a9ac-d1c9-c33a-03cfc810edbe AT users DOT sourceforge DOT net>
 <d76cfa4797d30702799a93892d454d95 AT smtp-cloud9 DOT xs4all DOT net>
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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.

Best regards
Thomas

--=20
Implement thread-safe and fault-tolerant software in C: visit picotm.org
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