Re: [PATCH][RFC] Add crash handler for qemu-linux-user

["Daniel P. Berrangé" <berrange@redhat.com>]

On Thu, Aug 10, 2023 at 10:14:06AM +0100, Peter Maydell wrote:
> On Thu, 10 Aug 2023 at 02:28, Richard Henderson
> <richard.henderson@linaro.org> wrote:
> >
> > On 8/9/23 16:07, Helge Deller wrote:
> > > +            /* did qemu source code crashed? */
> > > +            if (unlikely(!h2g_valid(host_addr))) {
> > > +                qemu_show_backtrace(info);
> > > +            }
> >
> > This won't do anything at all when reserved_va == 0,
> > i.e. 64-bit guest on 64-bit host, or any 32-bit host.
> >
> > The idea of having a backtrace is nice, I suppose, we just need
> > a better detector.
> 
> I think Dan also had a look at one point at doing
> backtraces for crashes in system emulation mode?
> Certainly this would be useful for test crashes in CI.

I stopped that work as I couldn't figure out a way to get a backtrace
across all the threads, which severely limited its usefulness in the
QEMU system emulators.

With regards,
Daniel
-- 
|: https://berrange.com      -o-    https://www.flickr.com/photos/dberrange :|
|: https://libvirt.org         -o-            https://fstop138.berrange.com :|
|: https://entangle-photo.org    -o-    https://www.instagram.com/dberrange :|