[asterisk-dev] Unable to load module

[Kevin P. Fleming]

On 10/05/2010 03:58 PM, Pavel Troller wrote:
> Hi!
>   I'm fixing some bugs in a module and I have strange problems. After
> recompiling the module, it cannot be loaded to the Asterisk anymore:
> 
> gamera1*CLI> module load chan_ooh323.so
> Unable to load module chan_ooh323.so
> Command 'module load chan_ooh323.so ' failed.
> 
> I know that ooh323 is unsupported module, as well as I know, that 1.6.1,
> which I'm using, is unsupported Asterisk branch, but I'm asking a generic
> question: The function in the module I'm patching is very deep in the ASN1
> parsing code, it is not related to the module initialization, for sure.
> I'm adding more cases to the switch command, and when I add 5 cases, it
> never can be loaded. If I add just one case (any of the five), the module
> can be loaded. And for various combinations of cases, it sometimes can and
> somtimes cannot be loaded. It looks like it depends on a length of the
> code or something similar. I've added a big fat debug message to the
> beginning of the module init code and it is not printed, so the init code
> is not even called. It looks like the module loader simply refuses to
> work.
>   ldd'ing the module doesn't show anything suspicious, it just links 
> against general libraries, exactly as another modules (and it doesn't
> differ for loadable and unloadable version of the module). 
> Of course, compilation and linking of the module goues smoothly with no
> warnings. I'm really stuck here, because I absolutely don't understand,
> what's going on here. Any hints ?

Are you issuing this command via a remote Asterisk console? If so, you
won't see any error messages generated by the dynamic linker (like
missing symbols or other problems), because those are sent directly to
stderr.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
skype: kpfleming | jabber: kfleming at digium.com
Check us out at www.digium.com & www.asterisk.org