Re: Segfault in chan cpool_release_pool

Anik Dasgupta <anikdg123@xxxxxxxxx> · Tue, 5 Jul 2016 21:05:18 +0530

Hi ,I have worked a bit with pjnath and faced this segfault.

My trace was like this ..

#0  0x00000032cb632625 in raise () from /lib64/libc.so.6
No symbol table info available.
#1  0x00000032cb633e05 in abort () from /lib64/libc.so.6
No symbol table info available.
#2  0x00000032cb670537 in __libc_message () from /lib64/libc.so.6
No symbol table info available.
#3  0x00000032cb675f4e in malloc_printerr () from /lib64/libc.so.6
No symbol table info available.
#4  0x00000032cb678cf0 in _int_free () from /lib64/libc.so.6
No symbol table info available.
#5  0x0000000000462fa6 in cpool_release_pool ()
No symbol table info available.
#6  0x000000000043664a in destroy_tdata ()
No symbol table info available.
#7  0x000000000046672d in pj_timer_heap_poll ()
No symbol table info available.
#8  0x000000000040b4e4 in handle_events (max_msec=500, p_count=0x0, thread_index=0x6d3560) at ice.cpp:87
        timeout = {sec = 0, msec = 0}
        count = 0
        c = 0
        __PRETTY_FUNCTION__ = "pj_status_t handle_events(unsigned int, unsigned int*, void*)"
        max_timeout = {sec = 0, msec = 500}
        net_event_count = 0
        index = 7
#9  0x000000000040b7d7 in icedemo_worker_thread (unused=0x6d3560) at ice.cpp:168
        thread_check = 7
        thread_id = 140737198937856
        my_set = {__bits = {16, 0 <repeats 15 times>}}
#10 0x000000000045befa in thread_main ()
No symbol table info available.
#11 0x00000032cba07aa1 in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#12 0x00000032cb6e893d in clone () from /lib64/libc.so.6
No symbol table info available.
(gdb) 

0  0x00000032cb632625 in raise () from /lib64/libc.so.6
#1  0x00000032cb633e05 in abort () from /lib64/libc.so.6
#2  0x00000032cb670537 in __libc_message () from /lib64/libc.so.6
#3  0x00000032cb675f4e in malloc_printerr () from /lib64/libc.so.6
#4  0x00000032cb678cf0 in _int_free () from /lib64/libc.so.6
#5  0x0000000000462fa6 in cpool_release_pool ()
#6  0x000000000043664a in destroy_tdata ()
#7  0x000000000046672d in pj_timer_heap_poll ()
#8  0x000000000040b4e4 in handle_events (max_msec=500, p_count=0x0, thread_index=0x6d3560) at ice.cpp:87
#9  0x000000000040b7d7 in icedemo_worker_thread (unused=0x6d3560) at ice.cpp:168
#10 0x000000000045befa in thread_main ()
#11 0x00000032cba07aa1 in start_thread () from /lib64/libpthread.so.0
#12 0x00000032cb6e893d in clone () from /lib64/libc.so.6

I have set the pj_caching_pool_init max_capacity parameter to 65536. Since that I haven't got segfault in this .
I am not sure whether this is the correct solution. But most probably it worked for me, since I haven't encountered it again. 

On Tue, Jul 5, 2016 at 8:32 PM, Ross Beer <ross.beer@xxxxxxxxxxx> wrote:

Hi,

Can anyone provide any assistance here?

Kind regards,

Ross

From: pjsip <pjsip-bounces@xxxxxxxxxxxxxxx> on behalf of Ross Beer <ross.beer@xxxxxxxxxxx>

Sent: 01 July 2016 11:03

To: pjsip@xxxxxxxxxxxxxxx

Subject:  Segfault in chan cpool_release_pool

Hi,

I am currently receiving a segfault with PJSIP SVN 5359 and unable to compile the latest SVN version due to the following errors:

trunk_REV5374/third_party/lib

/usr/src/pjproject-trunk_REV5374/pjmedia/lib/libpjmedia.so: undefined reference to `pjmedia_video_format_mgr_instance'

/usr/src/pjproject-trunk_REV5374/pjmedia/lib/libpjmedia.so: undefined reference to `pjmedia_format_get_video_format_detail'

/usr/src/pjproject-trunk_REV5374/pjmedia/lib/libpjmedia.so: undefined reference to `pjmedia_get_video_format_info'

collect2: error: ld returned 1 exit status

make[2]: *** [../bin/pjmedia-test-x86_64-unknown-linux-gnu] Error 1

make[2]: Leaving directory `/usr/src/pjproject-trunk_REV5374/pjmedia/build'

make[1]: *** [pjmedia-test-x86_64-unknown-linux-gnu] Error 2

make[1]: Leaving directory `/usr/src/pjproject-trunk_REV5374/pjmedia/build'

make: *** [all] Error 1

Can you please suggest a fix for the above?

Backtrace from segfault:

0  0x00007f9134077a28 in raise () from /lib64/libc.so.6

[Current thread is 1 (Thread 0x7f90a236b700 (LWP 29614))]

#0  0x00007f9134077a28 in raise () at /lib64/libc.so.6

#1  0x00007f913407962a in abort () at /lib64/libc.so.6

#2  0x00007f91340bad7a in  () at /lib64/libc.so.6

#3  0x00007f91340c31ca in _int_free () at /lib64/libc.so.6

#4  0x00007f91340c672c in free () at /lib64/libc.so.6

#5  0x00007f90a8a876a5 in cpool_release_pool (pf=0x7f90a4584da0 <caching_pool>, pool=0x7f90d8a4ad40) at ../src/pj/pool_caching.c:259

        pool_capacity = <optimized out>

        i = <optimized out>

        pool = <optimized out>

        pf = <optimized out>

        cp = 0x7f90a4584da0 <caching_pool>

        pool_capacity = <optimized out>

#6  0x00007f90aa5cbb48 in pjsip_tx_data_dec_ref (tdata=0x7f90d8a4ade8) at ../src/pjsip/sip_transport.c:496

#7  0x00007f90aa5cf808 in on_data_sent (asock=<optimized out>, op_key=0x7f90d8a4ae40, bytes_sent=bytes_sent@entry=-120110) at ../src/pjsip/sip_transport_tcp.c:1249

        tcp = 0x7f90d896e538

        tdata_op_key = 0x7f90d8a4ae40

#8  0x00007f90aa5cfc23 in on_connect_complete (asock=<optimized out>, status=<optimized out>) at ../src/pjsip/sip_transport_tcp.c:1515

        pending_tx = 0x7f91183aecd8

        op_key = <optimized out>

        tcp = 0x7f90d896e538

        addr = {addr = {sa_family = 0}, ipv4 = {sin_family = 0, sin_port = 0, sin_addr = {s_addr = 0}, sin_zero = "-W\250\250\220\177\000"}, ipv6 = {sin6_family = 0, sin6_port = 0, sin6_flowinfo = 0, sin6_addr = {s6_addr =
 "-W\250\250\220\177\000\000\250cxØ \177\000", u6_addr32 = {2829604653, 32656, 3631768488, 32656}}, sin6_scope_id = 2829604788}}

        addrlen = 0

        state_cb = <optimized out>

#9  0x00007f90a8a7e72f in ioqueue_dispatch_write_event (ioqueue=0x30f01a0, h=0x311a1d0) at ../src/pj/ioqueue_common_abs.c:286

        status = 120110

        has_lock = 1

        h = 0x311a1d0

        ioqueue = 0x30f01a0

        rc = <optimized out>

#10 0x00007f90a8a7fc9b in pj_ioqueue_poll (ioqueue=0x30f01a0, timeout=timeout@entry=0x7f90a236ad70) at ../src/pj/ioqueue_epoll.c:800

        i = <optimized out>

        count = <optimized out>

        event_cnt = 6

        processed_cnt = 3

        msec = 10

        events = {{events = 29, data = "" = 0x3119e18, fd = 51486232, u32 = 51486232, u64 = 51486232}}, {events = 29, data = "" = 0x3119fd8, fd = 51486680, u32 = 51486680, u64 = 51486680}}, {events = 29, data = "" = 0x311a550,
 fd = 51488080, u32 = 51488080, u64 = 51488080}}, {events = 29, data = "" = 0x311a1d0, fd = 51487184, u32 = 51487184, u64 = 51487184}}, {events = 29, data = "" = 0x311a710, fd = 51488528, u32 = 51488528, u64 = 51488528}}, {events = 29, data = "" = 0x311a390,
 fd = 51487632, u32 = 51487632, u64 = 51487632}}, {events = 2829584897, data = "" = 0x200007f90, fd = 32656, u32 = 32656, u64 = 8589967248}}, {events = 0, data = "" = 0x7f90a8a80b46 <pj_atomic_dec_and_get+38>, fd = -1465382074, u32 = 2829585222, u64 = 140259281603398}},
 {events = 3856867848, data = "" = 0xd86cfa9800007f90, fd = 32656, u32 = 32656, u64 = 15595115140419190672}}, {events = 32656, data = "" = 0x7, fd = 7, u32 = 7, u64 = 7}}, {events = 1, data = "" = 0x0, fd = 0, u32 = 0, u64 = 0}}, {events = 0, data = ""
 = 0x7f90a8a80509 <pj_thread_local_set+9>, fd = -1465383671, u32 = 2829583625, u64 = 140259281601801}}, {events = 3631020696, data = "" = 0xaa5d702300007f90, fd = 32656, u32 = 32656, u64 = 12276091454908039056}}, {events = 32656, data = "" = 0x7f9000000005,
 fd = 5, u32 = 5, u64 = 140256452018181}}, {events = 472481536, data = "" = 0x1c297f0000007f91, fd = 32657, u32 = 32657, u64 = 2029292745083879313}}, {events = 32657, data = "" = 0x7f911c297eb0, fd = 472481456, u32 = 472481456, u64 = 140261219466928}}}

        queue = {{key = 0x3119e18, event_type = WRITEABLE_EVENT}, {key = 0x3119fd8, event_type = WRITEABLE_EVENT}, {key = 0x311a550, event_type = WRITEABLE_EVENT}, {key = 0x311a1d0, event_type = WRITEABLE_EVENT}, {key = 0x311a710,
 event_type = WRITEABLE_EVENT}, {key = 0x311a390, event_type = WRITEABLE_EVENT}, {key = 0x7f911c297f00, event_type = 2829610171}, {key = 0x3b9aca00, event_type = 2757250464}, {key = 0x7f911c297eb0, event_type = 472481624}, {key = 0x7f911c297eb0, event_type
 = 2829612782}, {key = 0x7f911c297fc8, event_type = 2829584897}, {key = 0x7f911c297fc8, event_type = 2829604072}, {key = 0x7f911c297f58, event_type = 3631021136}, {key = 0x2, event_type = 472481624}, {key = 0x7f90a236ad70, event_type = 2829584897}, {key = 0x2f53ff0,
 event_type = 2829644588}}

        t1 = {u32 = {lo = 3647466018, hi = 8189}, u64 = 35175134652962}

        t2 = {u32 = {lo = 3648834133, hi = 8189}, u64 = 35175136021077}

#11 0x00007f90aa5c6c85 in pjsip_endpt_handle_events2 (endpt=0x2f53d08, max_timeout=max_timeout@entry=0x7f90a236adb0, p_count=p_count@entry=0x0) at ../src/pjsip/sip_endpoint.c:741

        timeout = {sec = 0, msec = 10}

        count = 2

        net_event_count = 0

        c = <optimized out>

#12 0x00007f90aa5c6d07 in pjsip_endpt_handle_events (endpt=<optimized out>, max_timeout=max_timeout@entry=0x7f90a236adb0) at ../src/pjsip/sip_endpoint.c:769

#13 0x00007f90a4353508 in monitor_thread_exec (endpt=<optimized out>) at res_pjsip.c:3863

        delay = {sec = 0, msec = 10}

#14 0x00007f90a8a80a56 in thread_main (param=0x2f5e9f8) at ../src/pj/os_core_unix.c:541

        rec = 0x2f5e9f8

        result = <optimized out>

#15 0x00007f9134e0961a in start_thread () at /lib64/libpthread.so.0

#16 0x00007f913414559d in clone () at /lib64/libc.so.6

Kind regards,

Ross

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