SIGBUS help, please

[Ion-Mihai Tetcu]

[ Stefan, please give me a uname -a and scheduler type. Thanks. ]

On Sun, 13 Feb 2005 20:25:59 +0200
Ion-Mihai Tetcu <itetcu at people.tecnik93.com> wrote:

> On Sun, 13 Feb 2005 12:04:37 -0500
> Brian Fundakowski Feldman <green at freebsd.org> wrote:
> 
> > On Sun, Feb 13, 2005 at 06:47:52PM +0200, Ion-Mihai Tetcu wrote:

 [ ... ]

> > > In valgrind, on the other hand,  --trace-pthread=all --trace-signals=yes it dies:
> > 
> > Have you tried helgrind?  That seems to be the one to try next.  The default
> > stack trace size it keeps is not very large, so you may want to increase it
> > to 100 or so before you go to debugging these.  These 4 errors probably are
> > genuine bugs and could be the root cause of the crash that's occurring...
> 
> On this it works
>  5.3-STABLE FreeBSD 5.3-STABLE #0: Thu Feb 10 17:38:05 EET 2005     root at it.buh.tecnik93.com:/usr/obj/usr/src/sys/IT53_U  i386
> this kernel has ULE
> 
> On this it crash
>  5.3-STABLE FreeBSD 5.3-STABLE #17: Mon Jan 17 23:40:22 EET 2005     itetcu at it.buh.cameradicommercio.ro:/usr/obj/usr/src/sys/IT53_d  i386
> this 4BSD
> 
>  WTF  ??

Could this be the reason ?

:
 jhb         2005-02-04 16:17:56 UTC

   FreeBSD src repository

   Modified files:        (Branch: RELENG_5)
[..]
   Log:
   MFC Most of the various fixes and changes to libpthread from HEAD to 5.x
   including: 
   Pull debug symbols in for statically linked binaries.
   gcc -O2 cleanups.
   Don't call _thr_start_sig_daemon() when SYSTEM_SCOPE_ONLY is defined.
   If a system scope thread didn't set a timeout, don't call the clock_gettime
   system call before and after sleeping.
   Add missing reference count drops to close a memory leak.
   Save cancelflags in signal frame.
   Use a generic way to back threads out of wait queues when handling
   signals instead of having more intricate knowledge of thread state
   within signal handling.
   Simplify signal code because of above (by David Xu).
   Use macros for libpthread usage of pthread_cleanup_push() and
   pthread_cleanup_pop().  This removes some instances of malloc()
   and free() from the semaphore and pthread_once() implementations.
   When single threaded and forking(), make sure that the current
   thread's signal mask is inherited by the forked thread.
   Use private mutexes for libc and libpthread.  Signals are
   deferred while threads hold private mutexes.  This fix breaks
   an internal system ABI that old versions of the
   www/linuxpluginwrapper port depend on.  Upgrading that port to the
   latest version will fix that.
   Fix race condition in condition variables where handling a
   signal (pthread_kill() or kill()) may not see a wakeup
   (pthread_cond_signal() or pthread_cond_broadcast()).
   Don't panic when sigsuspend is interrupted by a cancellation.

jhb         2005-02-04 16:07:33 UTC

   FreeBSD src repository

   Modified files:        (Branch: RELENG_5)
     lib/libpthread/thread thr_exit.c 
   Log:
   MFC: Check unhandled signals before thread marks itself as DEAD;
   this reduces chances of losing a signal.



-- 
IOnut
Unregistered ;) FreeBSD "user"