(gdb) bt
#0  0x00000000004dae83 in ?? ()
#1  0x00000000004847d3 in ?? ()
#2  0x000000000048526b in ast_hashtab_lookup ()
#3  0x00000000004db2e4 in ast_sched_del ()
#4  0x00002aaabf40a366 in ?? () from /usr/lib64/asterisk/modules/chan_sip.so
#5  0x00002aaabf435cb2 in ?? () from /usr/lib64/asterisk/modules/chan_sip.so
#6  0x00002aaabf43ae8f in ?? () from /usr/lib64/asterisk/modules/chan_sip.so
#7  0x00002aaabf43d590 in ?? () from /usr/lib64/asterisk/modules/chan_sip.so
#8  0x00002aaabf43e227 in ?? () from /usr/lib64/asterisk/modules/chan_sip.so
#9  0x000000000048bfac in ast_io_wait ()
#10 0x00002aaabf420c5a in ?? () from /usr/lib64/asterisk/modules/chan_sip.so
#11 0x00000000004eddde in ?? ()
#12 0x000000334980673d in start_thread () from /lib64/libpthread.so.0
#13 0x0000003348cd44bd in clone () from /lib64/libc.so.6


(gdb) bt full
#0  0x00000000004dae83 in ?? ()
No symbol table info available.
#1  0x00000000004847d3 in ?? ()
No symbol table info available.
#2  0x000000000048526b in ast_hashtab_lookup ()
No symbol table info available.
#3  0x00000000004db2e4 in ast_sched_del ()
No symbol table info available.
#4  0x00002aaabf40a366 in ?? () from /usr/lib64/asterisk/modules/chan_sip.so
No symbol table info available.
#5  0x00002aaabf435cb2 in ?? () from /usr/lib64/asterisk/modules/chan_sip.so
No symbol table info available.
#6  0x00002aaabf43ae8f in ?? () from /usr/lib64/asterisk/modules/chan_sip.so
No symbol table info available.
#7  0x00002aaabf43d590 in ?? () from /usr/lib64/asterisk/modules/chan_sip.so
No symbol table info available.
#8  0x00002aaabf43e227 in ?? () from /usr/lib64/asterisk/modules/chan_sip.so
No symbol table info available.
#9  0x000000000048bfac in ast_io_wait ()
No symbol table info available.
#10 0x00002aaabf420c5a in ?? () from /usr/lib64/asterisk/modules/chan_sip.so
No symbol table info available.
#11 0x00000000004eddde in ?? ()
No symbol table info available.
#12 0x000000334980673d in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#13 0x0000003348cd44bd in clone () from /lib64/libc.so.6
No symbol table info available.