libkse and bus error

[Morten Rodal]

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 at 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 at 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