Hello,

On 9/10/12 2:33 PM, Carlos Ruiz Díaz wrote:

Hi Daniel,

no, it's just a plain make && make install.

I spent a few hours on debugging and I figured out that it was an off by one error on a memcpy() on certain exceptional conditions. I fixed that but then I found a memory leak that's causing the crash after 40k calls but I'm having a hard time interpreting the dump provided after sending the SIGUSR1 to the process. if I'm not mistaken, there are two pkg_str_dup() leaks per call but I'm still searching where I'm missing the pkg_free().

Is there a way to know where in the code the pkg_str_dup was called?

I tried with valgrind too, but after the macro expansion of the memory management functions, is very hard to find where it was called.

here are some hints about troubleshooting memory:
http://www.asipto.com/pub/kamailio-devel-guide/#c04troubleshooting

if you set memdbg and memlog lower than debug global parameter, then you get all memory operations in the syslog (be sure you compile with MEMDBG=1). Also look at mem_summary:
http://www.kamailio.org/wiki/cookbooks/3.3.x/core#mem_summary

and cfgutils module readme for some functions that can be used in config to dump the memory usage.

Cheers,
Daniel

Regards.

Carlos.
On Mon, Sep 10, 2012 at 4:02 AM, Daniel-Constantin Mierla <miconda@gmail.com> wrote:
Hello,

yes, by default is with debug symbols on. Do you provide special flags or parameters to the make command?

Cheers,
Daniel

On 9/8/12 9:39 PM, Carlos Ruiz Díaz wrote:
Hello list,

I'm trying to debug my module after it crashed by SIGSEGV, but the problem is that I'm unable to see the relevant data in the core file that's being dumped after the crash.

For example, if I do bt full, I get:

0 0x0ef0f494 in append_string () from /opt/install/kamailio-3.2.3/lib/kamailio/modules_k/cnx3a.so

No symbol table info available.

#1 0x0eef9658 in build_message () from /opt/install/kamailio-3.2.3/lib/kamailio/modules_k/cnx3a.so

No symbol table info available.

Backtrace stopped: frame did not save the PC

Only the functions that were called but no parameter values.

AFAIK, if I compile kamailio from sources, it is by default compiled with the -g option, so, it looks like that I'm missing something else.

Regards.

Carlos.
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-- Daniel-Constantin Mierla - http://www.asipto.com http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda Kamailio Advanced Training, Berlin, Nov 5-8, 2012 - http://asipto.com/u/kat Kamailio Advanced Training, Miami, USA, Nov 12-14, 2012 - http://asipto.com/u/katu

-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Kamailio Advanced Training, Berlin, Nov 5-8, 2012 - http://asipto.com/u/kat
Kamailio Advanced Training, Miami, USA, Nov 12-14, 2012 - http://asipto.com/u/katu