[sr-dev] Compile modules with debug symbols
Daniel-Constantin Mierla
miconda at gmail.com
Mon Sep 10 18:18:07 CEST 2012
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 at gmail.com <mailto:miconda at 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://twitter.com/#%21/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
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