Re: Core files

From: Rob Stewart (
Date: 06/07/96

On Fri, 7 Jun 1996, Melen wrote:

> I've got a problem... My mud has been extremely modified and I seem to 
> have developed a bug in the group code, specifically when the group kills 
> the mob the mud crashes. Now, this would be easy to pinpoint if my mud 
> wrote core files when it crashed. My question is, then... How do I get 
> linux to write core files when a program seg faults?
> Or some other way to trace the bug down. My version of linux has NEVER 
> written core files for some reason and research it as I have, I still 
> haven't found an answer. So...
> 1) How can I make circle output a core file (I run Linux Kernel 1.2.8 (I 
> know old;))
> or
> 2) What other way can I use to pinpoint the exact function or maybe even 
> line of code causing the crash?

	Well, since your running linux, and having the same problems I 
was having I'm assuming your using bash.  Switch to tcsh and create a 
file .cshrc, which contains the line limit coredumpsize unlimited.  From 
there, a core file will generate in yourcircledir/lib/core, and you type 
gdb ./bin/circle ./lib/core, and that will enter a debugger.  From there, 
it should show you a line of code that crashed it, (type list to see more 
of the code, and back will list the functions up to the crash).. 

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