[Freeswitch-users] Switch_curl

Chris Mandra mandra at gmail.com
Wed Mar 16 03:47:55 MSK 2016 

Should curl calls be done in separate thread or is it ok to do them in
the main thread of modules?
On Tuesday, March 15, 2016, Anthony Minessale <anthony.minessale at gmail.com>
wrote:

> Curl is used in a few places and is not unstable.  Study some of those
> mods and maybe you can see how to use it in a typical situation.  Probably
> its related to memory management or lifecycle of objects you may be using.
>
> On Tuesday, March 15, 2016, Chris Mandra <mandra at gmail.com
> <javascript:_e(%7B%7D,'cvml','mandra at gmail.com');>> wrote:
>
>> Hey guys, I'm working on a simple media bug module using FS 1.6. When a
>> call comes in I'm calling switch_curl doing an http get.
>>
>> In switch_standard_app I use switch_curl and invoke
>> switch_curl_easy_perform and exit after that.
>>
>> Calling switch_curl seems very unstable. It's crashing free switch most
>> of the time.  Are there any things I should be looking for related to this?
>> I'm wondering if maybe this is a threading issue? Any ideas?
>> I've included some backtraces
>>
>> Thanks, chris
>>
>>
>> (gdb) bt
>>
>> #0  0x00007f8f00c59cc9 in __GI_raise (sig=sig at entry=6) at
>> ../nptl/sysdeps/unix/sysv/linux/raise.c:56
>>
>> #1  0x00007f8f00c5d0d8 in __GI_abort () at abort.c:89
>>
>> #2  0x00007f8f00c96394 in __libc_message (do_abort=do_abort at entry=1,
>> fmt=fmt at entry=0x7f8f00da4b28 "*** Error in `%s': %s: 0x%s ***\n") at
>> ../sysdeps/posix/libc_fatal.c:175
>>
>> #3  0x00007f8f00ca266e in malloc_printerr (ptr=<optimized out>,
>> str=0x7f8f00da0c19 "free(): invalid pointer", action=1) at malloc.c:4996
>>
>> #4  _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at
>> malloc.c:3840
>>
>> #5  0x00007f8f01334567 in switch_log_node_free (pnode=pnode at entry=0x7f8eb2b1f158)
>> at src/switch_log.c:136
>>
>> #6  0x00007f8eeb192a24 in read_packet (listener=listener at entry=0x7f8ebc027898,
>> event=event at entry=0x7f8eb2b1f7f0, timeout=timeout at entry=0) at
>> mod_event_socket.c:1361
>>
>> #7  0x00007f8eeb1988a0 in listener_run (thread=<optimized out>,
>> obj=0x7f8ebc027898) at mod_event_socket.c:2719
>>
>> #8  0x00007f8f01544430 in dummy_worker (opaque=0x7f8eb2be4868) at
>> threadproc/unix/thread.c:151
>>
>> #9  0x00007f8f00ff0182 in start_thread (arg=0x7f8eb2b20700) at
>> pthread_create.c:312
>>
>> #10 0x00007f8f00d1d47d in clone () at
>> ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
>>
>>
>> *[* <https://soniccloud.slack.com/archives/D02UEC39S/p1458078254000027>
>>
>> 5:44 <https://soniccloud.slack.com/archives/D02UEC39S/p1458078254000027>
>>
>> *]* <https://soniccloud.slack.com/archives/D02UEC39S/p1458078254000027>
>>
>> (gdb) bt full
>>
>> #0  0x00007f8f00c59cc9 in __GI_raise (sig=sig at entry=6) at
>> ../nptl/sysdeps/unix/sysv/linux/raise.c:56
>>
>>        resultvar = 0
>>
>>        pid = 18329
>>
>>        selftid = 18421
>>
>> #1  0x00007f8f00c5d0d8 in __GI_abort () at abort.c:89
>>
>>        save_stage = 2
>>
>>        act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction =
>> 0x0}, sa_mask = {__val = {0 <repeats 16 times>}}, sa_flags = 0, sa_restorer
>> = 0x0}
>>
>>        sigs = {__val = {32, 0 <repeats 15 times>}}
>>
>> #2  0x00007f8f00c96394 in __libc_message (do_abort=do_abort at entry=1,
>> fmt=fmt at entry=0x7f8f00da4b28 "*** Error in `%s': %s: 0x%s ***\n") at
>> ../sysdeps/posix/libc_fatal.c:175
>>
>>        ap = {{gp_offset = 40, fp_offset = 32654, overflow_arg_area =
>> 0x7f8eb2b1f010, reg_save_area = 0x7f8eb2b1efa0}}
>>
>>        fd = 2
>>
>>        on_2 = <optimized out>
>>
>>        list = <optimized out>
>>
>>        nlist = <optimized out>
>>
>>        cp = <optimized out>
>>
>>        written = <optimized out>
>>
>> #3  0x00007f8f00ca266e in malloc_printerr (ptr=<optimized out>,
>> str=0x7f8f00da0c19 "free(): invalid pointer", action=1) at malloc.c:4996
>>
>>        buf = "00007f8ed0036700"
>>
>>        cp = <optimized out>
>>
>> #4  _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at
>> malloc.c:3840
>>
>>        size = <optimized out>
>>
>>        fb = <optimized out>
>>
>>        nextchunk = <optimized out>
>>
>>        nextsize = <optimized out>
>>
>>        nextinuse = <optimized out>
>>
>>        prevsize = <optimized out>
>>
>>        bck = <optimized out>
>>
>>        fwd = <optimized out>
>>
>>        errstr = <optimized out>
>>
>>        locked = <optimized out>
>>
>> #5  0x00007f8f01334567 in switch_log_node_free (pnode=pnode at entry=0x7f8eb2b1f158)
>> at src/switch_log.c:136
>>
>>        node = 0x7f8ed8012ab0
>>
>> #6  0x00007f8eeb192a24 in read_packet (listener=listener at entry=0x7f8ebc027898,
>> event=event at entry=0x7f8eb2b1f7f0, timeout=timeout at entry=0) at
>> mod_event_socket.c:1361
>>
>>        dnode = 0x7f8ed8012ab0
>>
>>        do_sleep = <optimized out>
>>
>>        mlen = 0
>>
>>        bytes = 0
>>
>>        mbuf = 0x7f8ecc1ebfc0 ""
>>
>>        buf = "Content-Type: log/data\nContent-Length: 88\nLog-Level:
>> 7\nText-Channel: 3\nLog-File: param_hps_strategy.cpp\nLog-Func:
>> retrieve\nLog-Line: 115\nUser-Data: \347@
>> \247\a\n\n\000\n\n\000\065-418f-a6d1-9dc8f48e0cf9\n\n\000\000\071\n\n\000c8f48e0cf9"...
>>
>>        len = 88
>>
>>        status = SWITCH_STATUS_BREAK
>>
>>        count = 0
>>
>>        elapsed = <optimized out>
>>
>>        start = 1457966137
>>
>>        pop = 0x7f8ed8012ab0
>>
>>        ptr = 0x7f8ecc1ebfc0 ""
>>
>>        crcount = 0 '\000'
>>
>>        buf_len = 2048
>>
>>        channel = 0x0
>>
>>        clen = 0
>>
>>        __PRETTY_FUNCTION__ = "read_packet"
>>
>>        __func__ = "read_packet"
>>
>> #7  0x00007f8eeb1988a0 in listener_run (thread=<optimized out>,
>> obj=0x7f8ebc027898) at mod_event_socket.c:2719
>>
>>        listener = 0x7f8ebc027898
>>
>>        buf = '\000' <repeats 1023 times>
>>
>>        len = 1024
>>
>>        status = <optimized out>
>>
>>        event = 0x0
>>
>>        reply = "\000OK log level  [7]", '\000' <repeats 493 times>
>>
>>        session = 0x0
>>
>>        channel = 0x0
>>
>>        revent = 0x0
>>
>>        var = <optimized out>
>>
>>        locked = 1
>>
>>        __PRETTY_FUNCTION__ = "listener_run"
>>
>>        __func__ = "listener_run"
>>
>> #8  0x00007f8f01544430 in dummy_worker (opaque=0x7f8eb2be4868) at
>> threadproc/unix/thread.c:151
>>
>>        thread = 0x7f8eb2be4868
>>
>> #9  0x00007f8f00ff0182 in start_thread (arg=0x7f8eb2b20700) at
>> pthread_create.c:312
>>
>>        __res = <optimized out>
>>
>>        pd = 0x7f8eb2b20700
>>
>>        now = <optimized out>
>>
>>        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140250860095232,
>> -640791540281233069, 0, 0, 140250860095936, 140250860095232,
>> 578173923610734931, 577994035108262227}, mask_was_saved = 0}}, priv = {pad
>> = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
>>
>>        not_first_call = <optimized out>
>>
>>        pagesize_m1 = <optimized out>
>>
>>        sp = <optimized out>
>>
>>        freesize = <optimized out>
>>
>>        __PRETTY_FUNCTION__ = "start_thread"
>>
>> #10 0x00007f8f00d1d47d in clone () at
>> ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
>>
>> No locals
>>
>
>
> --
> Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬
>
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-- 
mandra
c:410.258.5281
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