Experimental Physics and
Industrial Control System

"J. Lewis Muir" <[email protected]> · Fri, 20 Mar 2009 08:38:44 -0400

On 3/20/09 8:03 AM, Pierrick Hanlet wrote:
> Hi,
> I've developed a fake ioc and some edm panels to view the ioc data.  It runs 
> beautifully on my laptop.  I've copied the software to our epics server and
> now when I attempt to execute the edm panel, edm crashes with a
> segmentation fault error.  The only problem appears to be in executing.
> 
> Any ideas?
> Thanks,
> Pierrick

Hi, Pierrick.

You could run it in a debugger and try to see what's wrong.

Are you running Linux or Mac OS X (or some other UNIX-like OS)?  If so,
you could use GDB.  Say your edm screen is named motor.edl; you could do
the following:

$ gdb edm
(gdb) run -x motor.edl

Once it crashes, you can issue the bt command to get a backtrace:

(gdb) bt

Or, if edm is multithreaded, you could get a backtrace for all threads:

(gdb) thread apply all bt

If you don't understand the gdb, you could post it here and hopefully
someone would be able to help.  You should also state the version of
EPICS and edm you're using and the operating system and version you're
using.

Lewis

-- 
J. Lewis Muir
Software Engineer
IMCA-CAT/CARS

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System