Python core dumping

[Curtis Jensen]

David Allen wrote:
> 
> I have a medium sized python application which is causing
> python to segfault under Linux at very odd times.  I'd
> like to get a core dump, so I can try to figure out
> what on earth is going on with it, and possibly post
> a bug report or something similar.  But as odd as this
> sounds, the application will NOT dump core.  The
> program I'm running does not use any C extensions,
> it's written in pure python.
> 
> I've tried using:
> Python 1.5.2 (#0, Apr  3 2000, 14:46:48)  [GCC 2.95.2 20000313 (Debian GNU/Linux)] on linux2
> and
> 
> Python 2.0 (#1, Dec 17 2000, 18:36:14)
> [GCC 2.95.2 20000220 (Debian GNU/Linux)] on linux2
> 
> Both after issuing "ulimit -c unlimited" which gives
> this:
> 
> [x at test pscr]$ ulimit -a
> core file size (blocks)     unlimited
> data seg size (kbytes)      unlimited
> file size (blocks)          unlimited
> max locked memory (kbytes)  unlimited
> max memory size (kbytes)    unlimited
> open files                  1024
> pipe size (512 bytes)       8
> stack size (kbytes)         8192
> cpu time (seconds)          unlimited
> max user processes          256
> virtual memory (kbytes)     unlimited
> 
> So the lack of core dumping is not due to my
> environment as far as I can tell.
> 
> I did not compile 1.5.2, that's the default version
> that's in Debian GNU/Linux (Woody) right now.  As
> for 2.0, I only "./configure"'d it with a --prefix
> option.
> 
> How can I get python to dump core so I can figure out
> what's wrong with my program, or alternatively, what's
> wrong with python?  Any help would be appreciated.
> 
> --
> David Allen
> http://opop.nols.com/

You can also run with the -v option and you'll get all kinds of debuging
output.  It should tell you at which point it dumps.

-- 
Curtis Jensen
cjensen at bioeng.ucsd.edu
http://www-bioeng.ucsd.edu/~cjensen/
FAX (425) 740-1451