Re: seeking way to blow away X server

[Jay Estabrook <Jay Estabrook compaq com>]

On Fri, Feb 22, 2002 at 08:08:54AM -0800, Robert M. Riches Jr. wrote:
>
> I know it's a strange request, but does anybody know a reliable
> way to blow away an X server with the obnoxious floating point
> exception, signal 8?
> 
> Every once in a while, the X server compiled from xfree86.org
> 4.2.0 sources dies with a signal 8, apparently a floating point
> exception.  Acting on advice from Jay Estabrook (thanks), I
> built an X server with "#define HasCbrt NO" in host.def, but
> I'd like to be able to test whether it actually makes a
> difference.
> 
> Mail/news archives says "x11perf -wellipse10" would blow away
> the X server, but it doesn't do it for mine.

That's assuming the above x11perf component would be using the "arc"
primitives, which seemed (IMHO) to be the only part of the server
which would be likely to cause the FP exceptions.

Of course, x11perf may not trigger the FP exceptions the same way your
other app (the original cause for your complaint) does/did, WRT the
negative number passed to "pow" (IIRC).

Thus, you may need to run that original app on the new Xserver to be
sure the bug is fixed.

That's if I understand correctly what you're asking/trying to do above...

--Jay++

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Jay A Estabrook                            Alpha Engineering - LINUX Project
Compaq Computer Corp. - MRO1-2/K15         (508) 467-2080
200 Forest Street, Marlboro MA 01752       Jay.Estabrook@compaq.com
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