[Asterisk-Dev] SEGV in CVS version of Asterisk

Jonathan Tew jonathan at ultracart.com
Wed Dec 10 08:58:26 MST 2003

I would have to disagree with the advice that you guys are giving this 
person.  If the module compiles in to Asterisk by default then it should 
be coded to handle the null pointer gracefully.  Other non-developers 
could experience the same crashing of Asterisk and have no idea what is 
going on or how to diagnose it.  All they end up doing is either stop 
using the product because it seems buggy or harass people over and over 
again on the users mailing list.


Matteo Brancaleoni wrote:

>or better, just rm -fR all modules you don't need
>in /usr/lib/asterisk/modules 
>so no need to bother 'bout modules.conf
>but be aware that there're some deps between them
>(ie. can't have chan_modem_blah without chan_modem.so)
>Il mer, 2003-12-10 alle 05:48, Steven Critchfield ha scritto:
>>in /etc/asterisk/modules.conf
>>On Tue, 2003-12-09 at 21:53, Ron OHara wrote:
>>>Maybe someone can suggest how to bypass this problem.
>>>I took a copy of asterisk from CVS and did the 'make clean ; make 
>>>install ; make samples' and tried starting it (with all the configs 
>>>unchanged) just to see if it would start.
>>>Nope - instant Segmentation Fault.
>>>So - after a bit of tracking around with 'ddd' I found that the problem 
>>>is in the 'monitor' thread of the 'chan_vpb' driver.
>>>The SEGV occurs on line 142 of 'vpb-driver-2.2.34/src/fifo.cpp' - not 
>>>surprising since it is handed a NULL pointer as it's queue to read from.
>>>This was called from line 2185 of 'vpb-driver-2.2.34/src//vpbapi.cpp' 
>>>and is where the 'vpb_get_event_sync' routine tries to do an initial 
>>>read from a queue pointer (variable name is APIQ) ... and this pointer 
>>>is also NULL.
>>>Since I dont have a Voicetronix Voice Processing Board (VPB) in the 
>>>system, it's not surprising that all the setup stuff is null or not 
>>>My question is:  How do I tell the configs that I dont have a VPB 
>>>installed? - as a secondary issue, somewhere in the startup, the 
>>>initialisation of the VPB card should have failed and not let this 
>>>situation move forward to where it SEGV's .... if there is no config 
>>>file change I can make, can someone point me to (roughly) where the 
>>>initialisation happens so that I can make it tolerate the lack of hardware.
>>>Ron O'Hara
>>>Asterisk-Dev mailing list
>>>Asterisk-Dev at lists.digium.com

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