[asterisk-bugs] [JIRA] (ASTERISK-26664) pjsip: pj_thread_register() assertion

[Timo Teräs (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-26664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=244948#comment-244948 ] 

Timo Teräs commented on ASTERISK-26664:
---------------------------------------

I see this also on Alpine Linux. The gdb backtrace I have is:
{quote}
#0  0x000072e9689b1f6f in __syscall4 (a4=<optimized out>, a3=<optimized out>, a2=<optimized out>, a1=<optimized out>, 
    n=<optimized out>) at ./arch/x86_64/syscall_arch.h:38
#1  __restore_sigs (set=set at entry=0x72e9642adc20) at src/signal/block.c:43
#2  0x000072e9689b20d3 in raise (sig=sig at entry=6) at src/signal/raise.c:11
#3  0x000072e968989a77 in abort () at src/exit/abort.c:14
#4  0x000072e968989b33 in __assert_fail (expr=<optimized out>, file=<optimized out>, line=<optimized out>, func=<optimized out>)
    at src/exit/assert.c:8
#5  0x000072e9662eeb89 in pj_thread_this () from /usr/lib/libpj.so.2
#6  0x000072e9662eed5b in pj_mutex_lock () from /usr/lib/libpj.so.2
#7  0x000072e9662ef0b8 in pj_atomic_inc_and_get () from /usr/lib/libpj.so.2
#8  0x000072e964fdf9a6 in pjsip_inv_add_ref () from /usr/lib/libpjsip-ua.so.2
#9  0x000072e964fa8259 in chan_pjsip_answer (ast=0x4ac10624b18) at chan_pjsip.c:720
#10 0x000004ac0dff11a9 in ast_raw_answer (chan=0x4ac10624b18) at channel.c:2710
#11 0x000004ac0dff5ca2 in __ast_answer (chan=chan at entry=0x4ac10624b18, delay=delay at entry=0) at channel.c:2732
#12 0x000004ac0dff5f2f in ast_answer (chan=chan at entry=0x4ac10624b18) at channel.c:2837
#13 0x000072e96678c329 in playback_exec (chan=0x4ac10624b18, data=<optimized out>) at app_playback.c:473
#14 0x000004ac0e07b80f in pbx_exec (c=c at entry=0x4ac10624b18, app=app at entry=0x4ac105d1160, 
    data=data at entry=0x4ac10660298 "vm-person&digits/3&digits/1&digits/3&digits/3&digits/7&vm-not_available_record_message")
    at pbx_app.c:492
#15 0x000072e96675ffdb in lua_pbx_exec (L=0x4ac106224c0) at pbx_lua.c:233
#16 0x000072e96653f84c in ?? () from /usr/lib/liblua.so.5
#17 0x000072e966547d85 in ?? () from /usr/lib/liblua.so.5
#18 0x000072e96653f954 in ?? () from /usr/lib/liblua.so.5
#19 0x000072e96653ef22 in ?? () from /usr/lib/liblua.so.5
#20 0x000072e96653fa8e in ?? () from /usr/lib/liblua.so.5
#21 0x000072e96653c708 in lua_pcall () from /usr/lib/liblua.so.5
#22 0x000072e966760da4 in exec (chan=0x4ac10624b18, context=0x4ac106254d8 "default", exten=0x4ac10625528 "31337", priority=1, 
    callerid=<optimized out>, data=<optimized out>) at pbx_lua.c:1432
#23 0x000004ac0e0758c7 in pbx_extension_helper (c=c at entry=0x4ac10624b18, con=con at entry=0x0, context=<optimized out>, 
    exten=exten at entry=0x4ac10625528 "31337", priority=priority at entry=1, label=label at entry=0x0, 
    callerid=0x4ac105c2d80 "*87026805145", action=E_SPAWN, found=0x72e9642b2924, combined_find_spawn=1) at pbx.c:2939
#24 0x000004ac0e07623d in ast_spawn_extension (c=c at entry=0x4ac10624b18, context=<optimized out>, 
    exten=exten at entry=0x4ac10625528 "31337", priority=priority at entry=1, callerid=callerid at entry=0x4ac105c2d80 "*87026805145", 
    found=found at entry=0x72e9642b2924, combined_find_spawn=1) at pbx.c:4157
#25 0x000004ac0e076858 in __ast_pbx_run (c=c at entry=0x4ac10624b18, args=args at entry=0x0) at pbx.c:4331
#26 0x000004ac0e07794e in pbx_thread (data=data at entry=0x4ac10624b18) at pbx.c:4653
#27 0x000004ac0e0ceba8 in dummy_start (data=<optimized out>) at utils.c:1258
#28 0x000072e9689be95b in start (p=<optimized out>) at src/thread/pthread_create.c:147
{quote}

> pjsip: pj_thread_register() assertion
> -------------------------------------
>
>                 Key: ASTERISK-26664
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26664
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_pjsip
>    Affects Versions: 13.13.0, 13.13.1
>         Environment: Linux, Debian unstable
>            Reporter: Bernhard Schmidt
>         Attachments: paste_903006.txt
>
>
> When a system pjproject library is used with assertions enabled (NDEBUG=0) answering an incoming call leads to the following assertion:
> {noformat}
> asterisk: ../src/pj/os_core_unix.c:692: pj_thread_this: Assertion `!"Calling pjlib from unknown/external thread. You must " "register external threads with pj_thread_register() " "before calling any pjlib functions."' failed.
> Aborted
> {noformat}
> This is caused by this commit: https://github.com/asterisk/asterisk/commit/2b9ad3a5f736b6a4081e172f2a6d35dcd20b51e4
> A production build / embedded pjproject build does not fail since assertions are disabled there. But this still points to a programming error in chan_pjsip (as the assertion says, calling pjlib functions from an unregistered thread).



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