Experimental Physics and
Industrial Control System

"Davidsaver, Michael" <[email protected]> · Wed, 14 Sep 2011 10:05:20 -0400

What version of EPICS Base you are using?  There have been several bugs
in errlog fixed recently.

Also, can you reproduce the crash in a debugger?

> -----Original Message-----
> From: [email protected] [mailto:tech-talk-
> [email protected]] On Behalf Of haquin
> Sent: Wednesday, September 14, 2011 8:58 AM
> To: [email protected]
> Subject: ioc linux crash using errlogprintf
> 
> Hi all,
> 
> In my current dvp, for debug purpose, I use errlogPrintf (which I
> expect not to be intrusive like printf ...) and it crashes my Linux
> IOC.
> 
> I can reproduce the problem using an example application with just a
> sub record and putting the following loop in the process function :
>      for (i=0; i<bugErrLogSubLoop; i++)
>          errlogPrintf("[%ld]%s\n", i, "Dummy String Dummy String Dummy
> String Dummy String \0");
> 
> The sub record is periodically scanned every 10 sec.
> 
> I set the value of the "bugErrLogSubLoop" on IOC shell (var
> bugErrLogSubLoop 50),
> 
> when 10 < bugErrLogSubLoop < 50 errlog says messages were discarded as
> soos as bugErrLogSubLoop >=50 the IOC crashes ! (segmentation error)
> 
> the problem does not occur on VxWorks, messages are only discarded but
> IOC never crash.
> 
> does anyone have the same pb ?
> I gess that the lib used under VxWorks is different than the one with
> Linux, but what is this lib and what can I do ?
> 
> regards.
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System