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Re: [Qemu-devel] [PATCH] Handle terminating signals.
From: |
Daniel P. Berrange |
Subject: |
Re: [Qemu-devel] [PATCH] Handle terminating signals. |
Date: |
Wed, 13 Aug 2008 09:27:47 +0100 |
User-agent: |
Mutt/1.4.1i |
On Tue, Aug 12, 2008 at 09:42:07PM +0200, Gerd Hoffmann wrote:
> M. Warner Losh wrote:
> > In message: <address@hidden>
> > Gerd Hoffmann <address@hidden> writes:
> > : > No, because the program should not attempt to catch SEGV either.
> > :
> > : Why not? Can you change your attitude to say "no" without giving
> > : reasons please?
> >
> > The only portable thing one can do when catching SEGV is terminate the
> > program. Otherwise, when the signal handler returns, SEGV happens
> > again...
>
> Returning from the signal handler isn't going to work, sure. The only
> thing I want do is cleaning up before exiting.
>
> Most apps never ever have to care about that. Sometimes there are good
> reasons to attempt a cleanup even for a SEGV though. The X-Server for
> example attempts to put the gfx card into a sane state then.
The X server often fails to do this cleanup. This is why they're moving
mode setting into the kernel so it can be *reliably* reset. Relying on
a SEGV handler for cleanup is just doomed to fail
Daniel
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- [Qemu-devel] [PATCH] Handle terminating signals., Gerd Hoffmann, 2008/08/06
- Re: [Qemu-devel] [PATCH] Handle terminating signals., Ian Jackson, 2008/08/11
- Re: [Qemu-devel] [PATCH] Handle terminating signals., Gerd Hoffmann, 2008/08/11
- Re: [Qemu-devel] [PATCH] Handle terminating signals., Ian Jackson, 2008/08/12
- Re: [Qemu-devel] [PATCH] Handle terminating signals., Stefano Stabellini, 2008/08/12
- Re: [Qemu-devel] [PATCH] Handle terminating signals., Gerd Hoffmann, 2008/08/12
- Re: [Qemu-devel] [PATCH] Handle terminating signals., M. Warner Losh, 2008/08/12
- Re: [Qemu-devel] [PATCH] Handle terminating signals., Gerd Hoffmann, 2008/08/12
- Re: [Qemu-devel] [PATCH] Handle terminating signals., Anthony Liguori, 2008/08/12
- Re: [Qemu-devel] [PATCH] Handle terminating signals.,
Daniel P. Berrange <=
- Re: [Qemu-devel] [PATCH] Handle terminating signals., Ian Jackson, 2008/08/13