Le Sunday 16 December 2007 21:49:10 Pierre Habouzit, vous avez écrit : > what is your kernel version ? I would be surprised it matters but … I started with a self-built vanilla 2.6.23.8, and now using 2.6.22-3-686 from Sid running on a "HyperThread" single CPU host. Both of them crash. I haven't been able to trigger the problem on amd64. > have you tried helgrind and other race-condition valgrind tools ? I didn't know helgrind was fixed nowadays. Tells this (no crash though): ==23149== Helgrind, a thread error detector. ==23149== Copyright (C) 2007-2007, and GNU GPL'd, by OpenWorks LLP et al. ==23149== Using LibVEX rev 1804, a library for dynamic binary translation. ==23149== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP. ==23149== Using valgrind-3.3.0-Debian, a dynamic binary instrumentation framework. ==23149== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al. ==23149== For more details, rerun with: -v ==23149== ==23149== Thread #2 was created ==23149== at 0x4116628: clone (in /usr/lib/debug/libc-2.7.so) ==23149== by 0x4027625: pthread_create@* (hg_intercepts.c:213) ==23149== by 0x8048694: main (in /home/remi/a.out) ==23149== ==23149== Thread #3 was created ==23149== at 0x4116628: clone (in /usr/lib/debug/libc-2.7.so) ==23149== by 0x4027625: pthread_create@* (hg_intercepts.c:213) ==23149== by 0x8048694: main (in /home/remi/a.out) ==23149== ==23149== Possible data race during write of size 4 at 0xBEC5D5BC ==23149== at 0x40333C3: pthread_barrier_wait (in /usr/lib/debug/libpthread-2.7.so) ==23149== by 0x4027710: mythread_wrapper (hg_intercepts.c:193) ==23149== by 0x402E382: start_thread (pthread_create.c:297) ==23149== by 0x411663D: clone (in /usr/lib/debug/libc-2.7.so) ==23149== Old state: shared-readonly by threads #2, #3 ==23149== New state: shared-modified by threads #2, #3 ==23149== Reason: this thread, #3, holds no consistent locks ==23149== Location 0xBEC5D5BC has never been protected by any lock ==23149== ==23149== Thread #1 is the program's root thread ==23149== ==23149== Thread #4 was created ==23149== at 0x4116628: clone (in /usr/lib/debug/libc-2.7.so) ==23149== by 0x4027625: pthread_create@* (hg_intercepts.c:213) ==23149== by 0x8048694: main (in /home/remi/a.out) ==23149== ==23149== Thread #5 was created ==23149== at 0x4116628: clone (in /usr/lib/debug/libc-2.7.so) ==23149== by 0x4027625: pthread_create@* (hg_intercepts.c:213) ==23149== by 0x8048694: main (in /home/remi/a.out) ==23149== ==23149== Possible data race during write of size 4 at 0xBEC5D5B4 ==23149== at 0x4033407: pthread_barrier_wait (in /usr/lib/debug/libpthread-2.7.so) ==23149== by 0x80486A9: main (in /home/remi/a.out) ==23149== Old state: shared-readonly by threads #1, #2, #3, #4, #5 and 6 others ==23149== New state: shared-modified by threads #1, #2, #3, #4, #5 and 6 others ==23149== Reason: this thread, #1, holds no consistent locks ==23149== Location 0xBEC5D5B4 has never been protected by any lock ==23149== ==23149== Thread #9 was created ==23149== at 0x4116628: clone (in /usr/lib/debug/libc-2.7.so) ==23149== by 0x4027625: pthread_create@* (hg_intercepts.c:213) ==23149== by 0x8048694: main (in /home/remi/a.out) ==23149== ==23149== Possible data race during write of size 4 at 0x4189C30 ==23149== at 0x41236A5: __lll_unlock_wake_private (in /usr/lib/debug/libc-2.7.so) ==23149== by 0x406668C: _nl_find_domain (finddomain.c:120) ==23149== by 0x4065FA1: __dcigettext (dcigettext.c:627) ==23149== by 0x4064EA2: dcgettext (dcgettext.c:53) ==23149== by 0x40B2338: strerror_r (_strerror.c:65) ==23149== by 0x407FB43: vfprintf (vfprintf.c:1559) ==23149== by 0x40A2BC3: vsnprintf (vsnprintf.c:120) ==23149== by 0x4087274: snprintf (snprintf.c:35) ==23149== by 0x80485FE: run (in /home/remi/a.out) ==23149== by 0x4027710: mythread_wrapper (hg_intercepts.c:193) ==23149== by 0x402E382: start_thread (pthread_create.c:297) ==23149== by 0x411663D: clone (in /usr/lib/debug/libc-2.7.so) ==23149== Old state: shared-modified by threads #3, #9 ==23149== New state: shared-modified by threads #3, #9 ==23149== Reason: this thread, #3, holds no consistent locks ==23149== Last consistently used lock for 0x4189C30 was first observed ==23149== at 0x40263C4: pthread_rwlock_wrlock (hg_intercepts.c:809) ==23149== by 0x4064D16: set_binding_values (bindtextdom.c:118) ==23149== by 0x4064E4F: bindtextdomain (bindtextdom.c:350) ==23149== by 0x8048653: main (in /home/remi/a.out) ==23149== ==23149== Possible data race during write of size 4 at 0x4190AE8 ==23149== at 0x406582C: _nl_find_msg (dcigettext.c:1041) ==23149== by 0x4066101: __dcigettext (dcigettext.c:639) ==23149== by 0x4064EA2: dcgettext (dcgettext.c:53) ==23149== by 0x40B2338: strerror_r (_strerror.c:65) ==23149== by 0x407FB43: vfprintf (vfprintf.c:1559) ==23149== by 0x40A2BC3: vsnprintf (vsnprintf.c:120) ==23149== by 0x4087274: snprintf (snprintf.c:35) ==23149== by 0x80485FE: run (in /home/remi/a.out) ==23149== by 0x80486A9: main (in /home/remi/a.out) ==23149== Old state: shared-readonly by threads #1, #9 ==23149== New state: shared-modified by threads #1, #9 ==23149== Reason: this thread, #1, holds no consistent locks ==23149== Last consistently used lock for 0x4190AE8 was first observed ==23149== at 0x40263C4: pthread_rwlock_wrlock (hg_intercepts.c:809) ==23149== by 0x4064D16: set_binding_values (bindtextdom.c:118) ==23149== by 0x4064E4F: bindtextdomain (bindtextdom.c:350) ==23149== by 0x8048653: main (in /home/remi/a.out) ==23149== ==23149== Possible data race during write of size 4 at 0x4191924 ==23149== at 0x4057DE4: __gconv (gconv.c:48) ==23149== by 0x40656E2: _nl_find_msg (dcigettext.c:1089) ==23149== by 0x4066101: __dcigettext (dcigettext.c:639) ==23149== by 0x4064EA2: dcgettext (dcgettext.c:53) ==23149== by 0x40B2338: strerror_r (_strerror.c:65) ==23149== by 0x407FB43: vfprintf (vfprintf.c:1559) ==23149== by 0x40A2BC3: vsnprintf (vsnprintf.c:120) ==23149== by 0x4087274: snprintf (snprintf.c:35) ==23149== by 0x80485FE: run (in /home/remi/a.out) ==23149== by 0x80486A9: main (in /home/remi/a.out) ==23149== Old state: owned exclusively by thread #9 ==23149== New state: shared-modified by threads #1, #9 ==23149== Reason: this thread, #1, holds no locks at all ==23149== ==23149== Possible data race during write of size 4 at 0x4191928 ==23149== at 0x4057DE7: __gconv (gconv.c:49) ==23149== by 0x40656E2: _nl_find_msg (dcigettext.c:1089) ==23149== by 0x4066101: __dcigettext (dcigettext.c:639) ==23149== by 0x4064EA2: dcgettext (dcgettext.c:53) ==23149== by 0x40B2338: strerror_r (_strerror.c:65) ==23149== by 0x407FB43: vfprintf (vfprintf.c:1559) ==23149== by 0x40A2BC3: vsnprintf (vsnprintf.c:120) ==23149== by 0x4087274: snprintf (snprintf.c:35) ==23149== by 0x80485FE: run (in /home/remi/a.out) ==23149== by 0x80486A9: main (in /home/remi/a.out) ==23149== Old state: owned exclusively by thread #9 ==23149== New state: shared-modified by threads #1, #9 ==23149== Reason: this thread, #1, holds no locks at all ==23149== ==23149== Possible data race during write of size 4 at 0x419190C ==23149== at 0x7F67591: gconv (in /usr/lib/gconv/ISO8859-1.so) ==23149== by 0x4057EA8: __gconv (gconv.c:80) ==23149== by 0x40656E2: _nl_find_msg (dcigettext.c:1089) ==23149== by 0x4066101: __dcigettext (dcigettext.c:639) ==23149== by 0x4064EA2: dcgettext (dcgettext.c:53) ==23149== by 0x40B2338: strerror_r (_strerror.c:65) ==23149== by 0x407FB43: vfprintf (vfprintf.c:1559) ==23149== by 0x40A2BC3: vsnprintf (vsnprintf.c:120) ==23149== by 0x4087274: snprintf (snprintf.c:35) ==23149== by 0x80485FE: run (in /home/remi/a.out) ==23149== by 0x80486A9: main (in /home/remi/a.out) ==23149== Old state: shared-readonly by threads #1, #9 ==23149== New state: shared-modified by threads #1, #9 ==23149== Reason: this thread, #1, holds no consistent locks ==23149== Last consistently used lock for 0x419190C was first observed ==23149== at 0x40263C4: pthread_rwlock_wrlock (hg_intercepts.c:809) ==23149== by 0x4064D16: set_binding_values (bindtextdom.c:118) ==23149== by 0x4064E4F: bindtextdomain (bindtextdom.c:350) ==23149== by 0x8048653: main (in /home/remi/a.out) ==23149== ==23149== Possible data race during write of size 4 at 0x4191930 ==23149== at 0x405EE2D: __gconv_transform_internal_utf8 (skeleton.c:652) ==23149== by 0x7F675EF: gconv (in /usr/lib/gconv/ISO8859-1.so) ==23149== by 0x4057EA8: __gconv (gconv.c:80) ==23149== by 0x40656E2: _nl_find_msg (dcigettext.c:1089) ==23149== by 0x4066101: __dcigettext (dcigettext.c:639) ==23149== by 0x4064EA2: dcgettext (dcgettext.c:53) ==23149== by 0x40B2338: strerror_r (_strerror.c:65) ==23149== by 0x407FB43: vfprintf (vfprintf.c:1559) ==23149== by 0x40A2BC3: vsnprintf (vsnprintf.c:120) ==23149== by 0x4087274: snprintf (snprintf.c:35) ==23149== by 0x80485FE: run (in /home/remi/a.out) ==23149== by 0x80486A9: main (in /home/remi/a.out) ==23149== Old state: shared-readonly by threads #1, #9 ==23149== New state: shared-modified by threads #1, #9 ==23149== Reason: this thread, #1, holds no consistent locks ==23149== Last consistently used lock for 0x4191930 was first observed ==23149== at 0x40263C4: pthread_rwlock_wrlock (hg_intercepts.c:809) ==23149== by 0x4064D16: set_binding_values (bindtextdom.c:118) ==23149== by 0x4064E4F: bindtextdomain (bindtextdom.c:350) ==23149== by 0x8048653: main (in /home/remi/a.out) ==23149== ==23149== Possible data race during write of size 4 at 0x4F41BD8 ==23149== at 0x402F548: pthread_join (pthread_join.c:102) ==23149== by 0x402583F: pthread_join (hg_intercepts.c:248) ==23149== by 0x80486BC: main (in /home/remi/a.out) ==23149== Old state: shared-readonly by threads #1, #2 ==23149== New state: shared-modified by threads #1, #2 ==23149== Reason: this thread, #1, holds no consistent locks ==23149== Location 0x4F41BD8 has never been protected by any lock ==23149== ==23149== Possible data race during write of size 4 at 0x5741BD8 ==23149== at 0x402F548: pthread_join (pthread_join.c:102) ==23149== by 0x402583F: pthread_join (hg_intercepts.c:248) ==23149== by 0x80486D6: main (in /home/remi/a.out) ==23149== Old state: shared-readonly by threads #1, #3 ==23149== New state: shared-modified by threads #1, #3 ==23149== Reason: this thread, #1, holds no consistent locks ==23149== Location 0x5741BD8 has never been protected by any lock ==23149== ==23149== ERROR SUMMARY: 18 errors from 10 contexts (suppressed: 17 from 2) > > I have libc6-dbg and that won't do it, what else am I supposed to do? > > `bt full` instead of just `bt` doesn't shows line numbers ? I'm afraid it doesn't (even without libc6-i686). -- Rémi Denis-Courmont http://www.remlab.net/
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