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Re: GDB threading/FP bug
- From: "bennet brauer" <bennetbrauer at hotmail dot com>
- To: kevinb at redhat dot com, ac131313 at ges dot redhat dot com
- Cc: gdb at sources dot redhat dot com
- Date: Tue, 13 Aug 2002 17:11:39 -0300
- Subject: Re: GDB threading/FP bug
- Bcc:
Well I'm unable to compile from the head of CVS. I get the following error
as it tries to compile "po"... This error doesn't exist in 5.2.1.
file=./`echo fr | sed 's,.*/,,'`.gmo \
&& rm -f $file && PATH=../src:$PATH no -o $file fr.po
/bin/sh: no: command not found
I did however find an old, closed, GDB bug that indicated linux 2.2.19 did
not have this bug. And indeed, on a 2.2.19 box, GDB doesn't exhibit this
bug with my test program. Currently I'm working around the issue with a
dummy floating point operation at the top of my program.
From: Kevin Buettner <kevinb@redhat.com>
To: Andrew Cagney <ac131313@ges.redhat.com>, bennet
<bennetbrauer@hotmail.com>
CC: gdb@sources.redhat.com
Subject: Re: GDB threading/FP bug
Date: Thu, 8 Aug 2002 11:36:59 -0700
On Aug 8, 1:34pm, Andrew Cagney wrote:
> > Some better searching revealed this is a very old bug. From last
> > year:
> >
> >
http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&th=adfbc404c374e980&seekm=OF36816CDD.AE7D54AF-ONC1256B1F.005622DC%40icos.be&frame=off
> >
> > I tried running GDB in GDB and I was able to get as far as seeing that
> > the floats seemed to be pushed onto the stack correctly until the
> > thread switch and all the ptrace stuff, but I wasn't totally sure if
> > the bug I was seeing at that point was in the GDB'd GDB or was the
> > same bug in the outter GDB.
>
> [Mailing list changed to something with less spam :-)]
>
> As you've discovered, there have been a number of very similar bugs that
> all involving corrupted FP and threads. It was thought that fixes for
> all such bugs were incorporated into both 5.2.*
> (http://sources.redhat.com/gdb/download/) and the mainline
> (http://sources.redhat.com/gdb/current/).
>
> Can you please check that your problem does occur in the latest
> release/mainline, and if it does, create a bug report using
> http://sources.redhat.com/gdb/bugs/.
Yes, I thought this bug was fixed too.
FWIW, I just did a build of gdb-5.2.1 on a Red Hat 7.3 machine (x86).
I wasn't able to reproduce the bug using the test program provided by
Bennet. (I've also tested the current development sources and, as
expected, don't see the bug there either.)
Kevin
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