[SR-Users] Problems debugging memory issues

[Daniel-Constantin Mierla]

Hello,

4.4 is real old and you should seriously consider upgrading.

Then, to the question itself, you have to look for _qm_pkg_block for
private memory root structure, probably the guide needs some updates,
likely it was written before the option to select the memory manager.

Cheers,
Daniel

On 15.12.20 16:44, Sheldon L wrote:
> Hi,
>
> I'm trying to investigate a possible memory leak issue in Kamailio and
> I'm following the instructions indicated
> in https://www.kamailio.org/wiki/tutorials/troubleshooting/memory
> <https://www.kamailio.org/wiki/tutorials/troubleshooting/memory>
>
> I'm using Kamailo 4.4 with the following kamailio internals:
>
> Print out of kamailio internals
>   Version: kamailio 4.4.2 (x86_64/linux) 892ad6
>   Default config:
> /apollo/env/TachyonPlatformKamailio/etc/kamailio/kamailio.cfg
>   Default paths to modules:
> /apollo/env/TachyonPlatformKamailio/lib64/kamailio/modules
>   Compile flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS,
> USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM,
> SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY,
> DBG_QM_MALLOC, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE,
> USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
>   MAX_RECV_BUFFER_SIZE=262144
>   MAX_LISTEN=16
>   MAX_URI_SIZE=1024
>   BUF_SIZE=65535
>   DEFAULT PKG_SIZE=8MB
>   DEFAULT SHM_SIZE=64MB
>   ADAPTIVE_WAIT_LOOPS=1024
>   TCP poll methods: poll, epoll_lt, epoll_et, sigio_rt, select
>   Source code revision ID: 892ad6
>   Compiled with: x86_64-unknown-linux-gnu-gcc 4.9.4
>   Compiled on: 23:36:48 Dec  8 2020
> Thank you for flying kamailio!
>
> I have attached to one of the kamailio tcp receiver processes via GDB
> and I am trying to dump memory blocks from the memory manager. 
> However, mem_block is not in the current_context.
>
> The following is the output from my gdb session:
>
> Copyright (C) 2013 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later
> <http://gnu.org/licenses/gpl.html <http://gnu.org/licenses/gpl.html>>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64-amazon-linux-gnu".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/
> <http://www.gnu.org/software/gdb/bugs/>>...
> Reading symbols from
> /opt/codedeploy-agent/deployment-root/95bb1634-e653-4cec-b327-99b18b9227a8/d-7AJ1XZP58/deployment-archive/sbin/kamailio...done.
> Attaching to program:
> /apollo/env/TachyonPlatformKamailio/sbin/kamailio, process 8946
> ptrace: Operation not permitted.
> (gdb) set $i=0
> (gdb) set $a = mem_block->first_frag
> No symbol "mem_block" in current context.
> (gdb) info list
> Undefined info command: "list".  Try "help info".
> (gdb) info threads
> No threads.
>
>
> Is there something I need to do before accessing the mem_block symbol?  
>
> Also do you have any other suggestions for debugging memory leaks that
> may not be documented?
>
> Note: i can't upgrade to the latest version of Kamailio as we have
> custom modules and would require considerable effort to upgrade.
>
> Thanks,
>
> Sheldon.
>
>
>
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Funding: https://www.paypal.me/dcmierla

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.kamailio.org/pipermail/sr-users/attachments/20201215/2bba325c/attachment.htm>