(gdb) bt full
#0  0x0018b7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
No symbol table info available.
#1  0x001cb7f5 in raise () from /lib/tls/libc.so.6
No symbol table info available.
#2  0x001cd199 in abort () from /lib/tls/libc.so.6
No symbol table info available.
#3  0x001ff4ea in __libc_message () from /lib/tls/libc.so.6
No symbol table info available.
#4  0x0020664c in _int_malloc () from /lib/tls/libc.so.6
No symbol table info available.
#5  0x00207e26 in calloc () from /lib/tls/libc.so.6
No symbol table info available.
#6  0x080bb8f2 in _ast_calloc (num=1, len=5464, file=0xe338d3 "chan_sip.c", lineno=3991, func=0xe35a1d "sip_alloc")
    at include/asterisk/utils.h:313
        p = (void *) 0x20e4f1
        __PRETTY_FUNCTION__ = "_ast_calloc"
#7  0x00dfbbc6 in sip_alloc (callid=0x78cd3ed "00078599-3d3d0016-13ecd6a8-12de53e0@192.168.0.200", sin=0x78cd0f0, useglobal_nat=1,
    intended_method=5) at chan_sip.c:3991
        p = (struct sip_pvt *) 0xdf380d
        __PRETTY_FUNCTION__ = "sip_alloc"
#8  0x00dfcbdf in find_call (req=0x78cd100, sin=0x78cd0f0, intended_method=5) at chan_sip.c:4180
        p = (struct sip_pvt *) 0x0
        tag = 0xe33b96 ""
        totag = "\000\000\000\000qä \000\000\000\000\000X\024ä\000À\222­\t\000Ñ\214\aHÐ\214\aIBà\0007Ó\214\añä \000\000\000\000EX\024ä\000À\222­\t\000Ñ\214\ahÐ\214\ad&ß\000):ã\000\034Ó\214\a\000\000\000\000KÙß\000\000Ñ\214\a\001\000\000\000\006\000\000\000\006\000\000\000\006\000\000\000X\024ä\000\230Ð\214\aî&ß\000\005\000\000\000\027=1\000\001\000\000\000X\024ä"
        fromtag = '\0' <repeats 127 times>
        callid = 0x78cd3ed "00078599-3d3d0016-13ecd6a8-12de53e0@192.168.0.200"
        from = 0x78cd382 "\"foxtrot\" <sip:5706@90.00.0.62>;tag=000785993d3d001541e200ad-237cd149"
        to = 0x78cd3cd "<sip:7704@90.00.0.62>"
        cseq = 0x78cd426 "101 INVITE"
        __PRETTY_FUNCTION__ = "find_call"
#9  0x00e285a0 in sipsock_read (id=0x9ada090, fd=27, events=1, ignore=0x0) at chan_sip.c:14156
        req = {rlPart1 = 0x78cd31c "INVITE", rlPart2 = 0x78cd323 "sip:7704@90.00.0.62", len = 788, headers = 13, method = 5, lines = 11,
  flags = 0, header = {0x78cd31c "INVITE", 0x78cd340 "Via: SIP/2.0/UDP 192.168.0.200:5060;branch=z9hG4bK012e9a28",
    0x78cd37c "From: \"foxtrot\" <sip:5706@90.00.0.62>;tag=000785993d3d001541e200ad-237cd149", 0x78cd3c9 "To: <sip:7704@90.00.0.62>",
    0x78cd3e4 "Call-ID: 00078599-3d3d0016-13ecd6a8-12de53e0@192.168.0.200", 0x78cd420 "CSeq: 101 INVITE", 0x78cd432 "User-Agent: CSCO/7",
    0x78cd446 "Contact: <sip:5706@192.168.0.200:5060>", 0x78cd46e "Expires: 180", 0x78cd47c "Content-Type: application/sdp",
    0x78cd49b "Content-Length: 249", 0x78cd4b0 "Accept: application/sdp",
    0x78cd4c9 "Remote-Party-ID: \"foxtrot\" <sip:5706@192.168.0.200>;party=calling;id-type=subscriber;privacy=off;screen=no", 0x78cd535 "",
    0x0 <repeats 50 times>}, line = {0x78cd537 "v=0", 0x78cd53c "o=Cisco-SIPUA 19249 22952 IN IP4 192.168.0.200", 0x78cd56c "s=SIP Call",
    0x78cd578 "c=IN IP4 192.168.0.200", 0x78cd590 "t=0 0", 0x78cd597 "m=audio 22692 RTP/AVP 0 8 18 101", 0x78cd5b9 "a=rtpmap:0 PCMU/8000",
    0x78cd5cf "a=rtpmap:8 PCMA/8000", 0x78cd5e5 "a=rtpmap:18 G729/8000", 0x78cd5fc "a=rtpmap:101 telephone-event/8000",
    0x78cd61f "a=fmtp:101 0-15", 0x78cd630 "", 0x0 <repeats 52 times>},
  data = "INVITE\000sip:7704@90.00.0.62\000SIP/2.0\000\000Via: SIP/2.0/UDP 192.168.0.200:5060;branch=z9hG4bK012e9a28\000\000From: \"foxtrot\" <sip:5706@90.00.0.62>;tag=000785993d3d001541e200ad-237cd149\000\000To: <sip:7704@90.00.0.62>\000\000"..., sdp_start = 0, sdp_end = 0}
        sin = {sin_family = 2, sin_port = 10956, sin_addr = {s_addr = 3355486400}, sin_zero = "\000\000\000\000\000\000\000"}
        p = (struct sip_pvt *) 0x9b9f560
        res = 788
        len = 16
        nounlock = 0
        recount = 0
        lockretry = 100
        __PRETTY_FUNCTION__ = "sipsock_read"
#10 0x0805763f in ast_io_wait (ioc=0x9a966a8, howlong=1000) at io.c:279
        res = 1
        x = 0
        origcnt = 1
#11 0x00e29029 in do_monitor (data=0x0) at chan_sip.c:14354
        res = 1000
        sip = (struct sip_pvt *) 0x0
        peer = (struct sip_peer *) 0x0
        t = 1154352421
        fastrestart = 0
        lastpeernum = -1
        curpeernum = 133
        reloading = 0
        __PRETTY_FUNCTION__ = "do_monitor"
#12 0x080bc506 in dummy_start (data=0x9adba60) at utils.c:554
        _buffer = {__routine = 0x80a7e75 <ast_unregister_thread>, __arg = 0x78cebb0, __canceltype = 0, __prev = 0x0}
        ret = (void *) 0x0
        a = {start_routine = 0xe28c37 <do_monitor>, data = 0x0,
  name = 0x9ae5fc8 "do_monitor", ' ' <repeats 11 times>, "started at [14413] chan_sip.c restart_monitor()"}
#13 0x00312371 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#14 0x0026b9be in clone () from /lib/tls/libc.so.6
No symbol table info available.
(gdb)