[Asterisk-Users] Segmentation Fault Problem

[Charles D'Englere]

Hi,

What do you think that the problem might be if a program has a segmentation 
fault at the same library call? The library call is from libpthread.so.0  
and the call itself is "pthread_mutex_locl ( )". I have enclosed the core 
dump information below. The program comes up and then does the segmentation 
fault.



(gdb) bt
#0  0x40035944 in pthread_mutex_lock () from /lib/tls/libpthread.so.0
#1  0x419ede1e in register_verify (p=3D0x8163890, sin=3D0x41bfc0d0, 
req=3D0x41bfc0e0, uri=3D0x41bfc2fd "sip:10.0.0.5", ignore=3D0) at 
chan_sip.c:5032
#2  0x419f4495 in handle_request (p=3D0x8163890, req=3D0x41bfc0e0, 
sin=3D0x41bfc0d0, recount=3D0x0, nounlock=3D0x41bfbf48) at chan_sip.c:7861
#3  0x419f6194 in sipsock_read (id=3D0x81413f8, fd=3D20, events=3D1, 
ignore=3D0x0) at chan_sip.c:7959
#4  0x0805317c in ast_io_wait (ioc=3D0x813fe08, howlong=3D0) at io.c:267
#5  0x419e27db in do_monitor (data=3D0x0) at chan_sip.c:8106
#6  0x400347f3 in start_thread () from /lib/tls/libpthread.so.0
#7  0x401a462a in clone () from /lib/tls/libc.so.6


(gdb) x/5i $eip
0x40035944 <pthread_mutex_lock+36>:     mov    0xc(%esi),%ecx
0x40035947 <pthread_mutex_lock+39>:     cmp    $0x1,%ecx
0x4003594a <pthread_mutex_lock+42>:     je     0x40035974 
<pthread_mutex_lock+84>
0x4003594c <pthread_mutex_lock+44>:     jg     0x4003598e 
<pthread_mutex_lock+110>
0x4003594e <pthread_mutex_lock+46>:     xor    %eax,%eax


(gdb) info registers
eax            0x0      0
ecx            0x0      0
edx            0x0      0
ebx            0x4003dff4       1073995764
esp            0x41bf01f4       0x41bf01f4
ebp            0x41bf0208       0x41bf0208
esi            0x0      0
edi            0x32da   13018
eip            0x40035944       0x40035944
eflags         0x210212 2163218
cs             0x73     115
ss             0x7b     123
ds             0x7b     123
es             0x7b     123
fs             0x0      0
gs             0x33     51


(gdb) info threads
  15 process 13005  0xffffe410 in ?? ()
  14 process 13007  0xffffe410 in ?? ()
  13 process 13008  0xffffe410 in ?? ()
  12 process 13009  0xffffe410 in ?? ()
  11 process 13010  0xffffe410 in ?? ()
  10 process 13012  0xffffe410 in ?? ()
   9 process 13013  0xffffe410 in ?? ()
   8 process 13014  0xffffe410 in ?? ()
   7 process 13015  0xffffe410 in ?? ()
   6 process 13016  0xffffe410 in ?? ()
   5 process 13017  0xffffe410 in ?? ()
   4 process 13019  0xffffe410 in ?? ()
   3 process 13020  0xffffe410 in ?? ()
   2 process 13021  0xffffe410 in ?? ()
*  1 process 13018  0x40035944 in pthread_mutex_lock () from 
/lib/tls/libpthread.so.0


asterisk:~ # cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 8
model name      : Pentium III (Coppermine)
stepping        : 10
cpu MHz         : 996.859
cache size      : 256 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov 
pat pse36 mmx fxsr sse
bogomips        : 1978.36

Thanks,
Charles