--- Begin Message ---
- To: Debian Bug Tracking System <submit@bugs.debian.org>
- Subject: libc6-prof: segmentation fault when using profiling with pthread.
- From: Witold Baryluk <baryluk@smp.if.uj.edu.pl>
- Date: Mon, 05 Apr 2010 05:05:01 +0200
- Message-id: <20100405030501.8428.67287.reportbug@sredniczarny>
Package: libc6-prof
Version: 2.10.2-6
Severity: important
# cat a.c int main() { return 0; } # gcc -g -pg a.c -o a -static-libgcc -lc_p
# ./a Exit code 0 # gcc -g -pg a.c -o a -static-libgcc -lc_p -pthread # ./a
Segmentation fault (core dumped) # gdb ./a ./core .... [New Thread 9335]
warning: Can't read pathname for load map: Input/output error. Reading symbols
from /lib/i686/cmov/libpthread.so.0...Reading symbols from
/usr/lib/debug/lib/i686/cmov/libpthread-2.10.2.so...done. done. Loaded symbols
for /lib/i686/cmov/libpthread.so.0 Reading symbols from
/lib/i686/cmov/libc.so.6...Reading symbols from
/usr/lib/debug/lib/i686/cmov/libc-2.10.2.so...done. done. Loaded symbols for
/lib/i686/cmov/libc.so.6 Reading symbols from /lib/ld-linux.so.2...Reading
symbols from /usr/lib/debug/lib/ld-2.10.2.so...done. done. Loaded symbols for
/lib/ld-linux.so.2 Core was generated by `./a'. Program terminated with signal
11, Segmentation fault. #0 0x0807fed1 in _dl_get_tls_static_info () (gdb) bt
#0 0x0807fed1 in _dl_get_tls_static_info () #1 0x400425ff in
__pthread_initialize_minimal_internal () at nptl-init.c:387 #2 0x40041df8 in
_init () at /build/buildd-eglibc_2.10.2-6-i386-fHPOAN/eglibc-2.10.2/build-
tree/i386-i686/nptl/crti.S:24 #3 0x4000e554 in call_init (l=0x40020858,
argc=1, argv=0xbfaa6734, env=0xbfaa673c) at dl-init.c:70 #4 0x4000e6e6 in
_dl_init (main_map=0x4001d670, argc=1, argv=0xbfaa6734, env=0xbfaa673c) at
dl-init.c:100 #5 0x4000088f in _dl_start_user () from /lib/ld-linux.so.2 (gdb)
Using -lpthread also gives this error. Removing -pthread from gcc command line
resolves problem in test program. Unfortunetly in my program i'm using
threads, and after removing -pthread, i have linking error. recursive.o: In
function `launch_thread': /maradns-1.4.03/server/recursive.c:3544: undefined
reference to `pthread_create' I found that using -lpthread_p resolves problem
in my test program (it links and runs correctly), but then in my main program i
got on linking this: /usr/lib/gcc/i486-linux-
gnu/4.4.3/../../../../lib/libpthread_p.a(lowlevellock.op): In function
`__lll_lock_wait_private': /build/buildd-eglibc_2.10.2-6-i386-fHPOAN/eglibc-2.1
0.2/nptl/../nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S:76: multiple
definition of `__lll_lock_wait_private' /usr/lib/gcc/i486-linux-
gnu/4.4.3/../../../../lib/libc_p.a(libc-lowlevellock.op):(.text+0x0): first
defined here /usr/lib/gcc/i486-linux-
gnu/4.4.3/../../../../lib/libpthread_p.a(lowlevellock.op): In function
`__lll_unlock_wake_private': /build/buildd-eglibc_2.10.2-6-i386-fHPOAN/eglibc-2
..10.2/nptl/../nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S:326:
multiple definition of `__lll_unlock_wake_private' /usr/lib/gcc/i486-linux-
gnu/4.4.3/../../../../lib/libc_p.a(libc-lowlevellock.op):(.text+0x30): first
defined here Could you add this information to
/usr/share/doc/libc6-prof/README.Debian , and solve problem with multiple
definitions? I also found that executable is probably not linked (compiler
done something wrong) correctly: # ldd ./a linux-gate.so.1 =>
(0x4001e000) libpthread.so.0 => /lib/i686/cmov/libpthread.so.0
(0x4003e000) libc.so.6 => /lib/i686/cmov/libc.so.6 (0x40057000)
/lib/ld-linux.so.2 (0x40000000) # Thanks.
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.34-rc2-sredniczarny-00184-g01e7770 (PREEMPT)
Locale: LANG=pl_PL.UTF-8, LC_CTYPE=pl_PL.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to pl_PL.UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages libc6-prof depends on:
ii libc6 2.10.2-6 Embedded GNU C Library: Shared lib
libc6-prof recommends no packages.
libc6-prof suggests no packages.
-- no debconf information
--- End Message ---