Date: Sun, 19 Oct 2003 20:31:29 +0200 From: Morten Rodal <morten@rodal.no> To: Daniel Eischen <eischen@vigrid.com> Cc: threads@freebsd.org Subject: Re: libkse and bus error Message-ID: <20031019183129.GA94145@slurp.rodal.no> In-Reply-To: <Pine.GSO.4.10.10310191413230.12750-100000@pcnet5.pcnet.com> References: <20031019145805.GA63314@slurp.rodal.no> <Pine.GSO.4.10.10310191413230.12750-100000@pcnet5.pcnet.com>
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On Sun, Oct 19, 2003 at 02:16:27PM -0400, Daniel Eischen wrote:
> On Sun, 19 Oct 2003, Morten Rodal wrote:
>
> > I seem to be able to crash almost every pthread program that uses
> > pthread_mutex'es. First I thought it was a problem with
> > pthread_testcancel(), until I compiled libkse with DEBUG_FLAGS=-g on
> > one of machines.
> >
> > Backtrace from a machine with DEBUG_FLAGS=-g and libkse:
> >
> > #0 0x28e6ed1b in kse_thr_interrupt () at {standard input}:15
> > #1 0x28e5f990 in _thr_sig_add (pthread=0x81fab00, sig=136293172,
> > info=0x0)
> > at /usr/src/lib/libpthread/thread/thr_sig.c:885
> > #2 0x28e687cb in kse_check_completed (kse=0x81fab00)
> > at /usr/src/lib/libpthread/thread/thr_kern.c:1558
> > #3 0x28e6721c in kse_sched_multi (kmbx=0x17e)
> > at /usr/src/lib/libpthread/thread/thr_kern.c:1021
>
> This is a problem. The mailbox pointer is invalid.
>
I thought it looked a bit strange. Any clues to what might have
caused this?
> > One machine is running a kernel from
> >
> > FreeBSD slurp.rodal.no 5.1-CURRENT FreeBSD 5.1-CURRENT #3: Tue Oct 14 20:47:45 CEST 2003 root@slurp.rodal.no:/usr/obj/usr/src/sys/slurp i386
> >
> > the other from
> >
> > FreeBSD hauk10.idi.ntnu.no 5.1-CURRENT FreeBSD 5.1-CURRENT #2: Fri Sep 26 09:12:55 CEST 2003 root@hauk10.idi.ntnu.no:/usr/obj/usr/src/sys/hauk10 i386
> >
> >
>
> I'm not having any of these problems with a -current from Oct 12th
> on both SMP and UP systems. I'm using KDE and mozilla.
>
The backtrace with debugging symbols is the dcgui-qt port (net/dc-gui)
which seems to use pthread mutexes quite heavily. It only starts 1
out of 10 times.
>
> How are you specifying libkse (/etc/libmap.conf or PTHREAD_LIBS)?
>
/etc/libmap.conf only contains (on both machines):
libc_r.so.5 libkse.so.1
libc_r.so libkse.so
>
> Are you using nvidia at all?
>
slurp.rodal.no uses nvidia, but hauk10.idi.ntnu.no uses standard X11
ATI mach64 (I think) drivers.
--
Morten Rodal
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