Re: Fatal error 'mutex is on list' at line 139 in file /usr/src/lib/libthr/thread/thr_mutex.c (errno = 35)

On Saturday 19 March 2016 12:32:56 Konstantin Belousov wrote:
> On Sat, Mar 19, 2016 at 12:24:11PM +0200, Oleg V. Nauman wrote:
> > On Saturday 19 March 2016 12:14:33 Konstantin Belousov wrote:
> > > On Sat, Mar 19, 2016 at 09:03:56AM +0200, Oleg V. Nauman wrote:
> > > > On Friday 18 March 2016 11:55:31 Konstantin Belousov wrote:
> > > > > On Fri, Mar 18, 2016 at 08:14:57AM +0200, Konstantin Belousov wrote:
> > > > > > Yes, please.  It would be significantly easier to diagnose the
> > > > > > problem
> > > > > > if
> > > > > > the minimal example is provided.  If not, please pack one crashing
> > > > > > app
> > > > > > and all it non-system libraries and provide the tarball to me.
> > > > > 
> > > > > Meantime you could also try the following change.  I doubt that it
> > > > > would
> > > > > fix your issue, but it is possibly related.  Only libthr needs to be
> > > > > rebuilt.
> > > > > 
> > > > > diff --git a/lib/libthr/thread/thr_fork.c
> > > > > b/lib/libthr/thread/thr_fork.c
> > > > > index 7256b68..531e09c 100644
> > > > > --- a/lib/libthr/thread/thr_fork.c
> > > > > +++ b/lib/libthr/thread/thr_fork.c
> > > >  
> > > >  No it is still coredumping.
> > > > 
> > > > The only positive effect is that segfaults are quite occasional
> > > > comparing
> > > > to stock libthr
> > > > 
> > > > Loaded symbols for /libexec/ld-elf.so.1
> > > > #0  0x00000008041b2d6a in thr_kill () from /lib/libc.so.7
> > > > [New Thread 809215000 (LWP 100253/<unknown>)]
> > > > (gdb) bt
> > > > #0  0x00000008041b2d6a in thr_kill () from /lib/libc.so.7
> > > > #1  0x00000008041b2d3b in __raise (s=6) at
> > > > /usr/src/lib/libc/gen/raise.c:52
> > > > #2  0x00000008041b2ca9 in abort () at
> > > > /usr/src/lib/libc/stdlib/abort.c:65
> > > > #3  0x0000000803eda67c in _thread_exit (fname=<value optimized out>,
> > > > 
> > > >     lineno=<value optimized out>, msg=<value optimized out>)
> > > >     at /usr/src/lib/libthr/thread/thr_exit.c:182
> > > > 
> > > > #4  0x0000000803ed56fc in mutex_lock_common (m=<value optimized out>,
> > > > 
> > > >     abstime=<value optimized out>, cvattach=<value optimized out>)
> > > >     at /usr/src/lib/libthr/thread/thr_mutex.c:139
> > > > 
> > > > #5  0x0000000803ed4c20 in __pthread_mutex_timedlock
> > > > (mutex=0x818200008,
> > > > 
> > > >     abstime=0x7fffffffc468) at
> > > >     /usr/src/lib/libthr/thread/thr_mutex.c:566
> > > 
> > > Again, please show me
> > > p *mutex
> > > p m
> > > p *m
> > > from the frame 5.
> >  
> >  #0  0x00000008041b2d6a in thr_kill () from /lib/libc.so.7
> > 
> > [New Thread 809215000 (LWP 100253/<unknown>)]
> > (gdb) f 5
> > #5  0x0000000803ed4c20 in __pthread_mutex_timedlock (mutex=0x818200008,
> > 
> >     abstime=0x7fffffffc468) at /usr/src/lib/libthr/thread/thr_mutex.c:566
> > 
> > 566                     ret = mutex_lock_common(m, abstime, 0);
> > Current language:  auto; currently minimal
> > (gdb) p *mutex
> > $1 = 0x8000000000000001
> > (gdb) p m
> > $2 = <value optimized out>
> > (gdb) p *m
> > Cannot access memory at address 0x1300000049
> > (gdb)
> 
> Try devel/gdb.  Also, you could recompile libthr with DEBUG_FLAGS="-O0 -g"
> to get rid of optimizations.

Core was generated by `akonadi_baloo_index'.
Program terminated with signal SIGABRT, Aborted.
#0  0x0000000805630d6a in thr_kill () from /lib/libc.so.7
(gdb) bt
#0  0x0000000805630d6a in thr_kill () from /lib/libc.so.7
#1  0x0000000805630d3b in __raise (s=6) at /usr/src/lib/libc/gen/raise.c:52
#2  0x0000000805630ca9 in abort () at /usr/src/lib/libc/stdlib/abort.c:65
#3  0x00000008053564b4 in _thread_exit (
    fname=0x805357b70 "/usr/src/lib/libthr/thread/thr_mutex.c", lineno=139,
    msg=0x805357b97 "mutex is on list") at 
/usr/src/lib/libthr/thread/thr_exit.c:182
#4  0x000000080534cddc in mutex_assert_not_owned (m=0x80064d000)
    at /usr/src/lib/libthr/thread/thr_mutex.c:139
#5  0x000000080534cfb9 in enqueue_mutex (curthread=0x80e015000, m=0x80064d000)
    at /usr/src/lib/libthr/thread/thr_mutex.c:383
#6  0x000000080534d213 in mutex_lock_common (m=0x80064d000, 
abstime=0x7fffffffd4e8,
    cvattach=0) at /usr/src/lib/libthr/thread/thr_mutex.c:533
#7  0x000000080534c6be in __pthread_mutex_timedlock (mutex=0x811c00008,
    abstime=0x7fffffffd4e8) at /usr/src/lib/libthr/thread/thr_mutex.c:566

(gdb) f 7
#7  0x000000080534c6be in __pthread_mutex_timedlock (mutex=0x811c00008,
    abstime=0x7fffffffd4e8) at /usr/src/lib/libthr/thread/thr_mutex.c:566
566                     ret = mutex_lock_common(m, abstime, 0);
(gdb) p *mutex
$1 = (pthread_mutex_t) 0x8000000000000001
(gdb) p m
$2 = (struct pthread_mutex *) 0x80064d000
(gdb) p *m
$3 = {m_lock = {m_owner = -2147383372, m_flags = 1, m_ceilings = {0, 0}, 
m_spare = {0, 0, 0,
      0}}, m_flags = 1, m_owner = 100276, m_count = 0, m_spinloops = 0, 
m_yieldloops = 0,
  m_qe = {tqe_next = 0x0, tqe_prev = 0x0}, m_pqe = {tqe_next = 0x0, tqe_prev = 
0x0}}
(gdb) p *curthread
No symbol "curthread" in current context.
(gdb)