Unexpected service closeing

[gonsalez-ru]

After executed in dialplan DongleSendSMS application Asterisk shuting down:

 [messages]
 exten => _X.,1,NoOp("${EXTEN} ${MESSAGE(body)}")
 exten => _X.,n,DongleSendSMS(gsm1,${EXTEN},"${MESSAGE(body)}")
 exten => h,n,Hangup()

Asterisk Ready.
    -- Executing [+79161234567@messages:1] NoOp("Message/ast_msg_queue", ""+79161234567 456"") in new stack
    -- Executing [+79161234567@messages:2] DongleSendSMS("Message/ast_msg_queue", "gsm1,+79161234567,"456"") in new stack
gate*CLI>
Disconnected from Asterisk server
Asterisk cleanly ending (0).
Executing last minute cleanups
Asterisk ending (0). 

P.S.
CLI "dongle sms" command works fine

[gonsalez-ru]

I need your advise. What diagnostic actions can i do to gather additional debug information?

[wdoekes]

Start the asterisk daemon from gdb:

# gdb `which asterisk`
(gdb) run asterisk -c

And then do the dongle stuff.

Then when it crashes, do:

bt
bt full

That should show you some info.

[gonsalez-ru]

Since i use precompiled for mipsel router chan_dongle module i'm limited in debugging toools. I didn't find GDB packet for my platform and I'm not familar with exotic cross compilation. :-(

[wdoekes]

Perhaps dmesg tells you at least an address (ip instruction pointer). Which you might be able to look up through addr2line. You may need to do some hexadecimal math to get the right value.

[gonsalez-ru]

Here is dmesg out:
do_page_fault(): sending SIGSEGV to asterisk for invalid read access from 00000000
epc = 76b34540 in libc-2.27.so[76aad000+17a000]
ra = 756eb6f0 in chan_dongle.so[756e8000+3c000]

There are two packets installed with libc:
opkg files libc | grep libc-2.27.so
/opt/lib/libc-2.27.so

opkg files gcc | grep libc-2.27.so
/opt/lib/gcc/mipsel-openwrt-linux-gnu/7.4.0/libc-2.27.so