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➜ Programming
➜ General
➜ Core dumps
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| Posted by
| Zeno
USA (2,871 posts) Bio
|
| Date
| Thu 24 Feb 2011 06:05 PM (UTC) Amended on Thu 24 Feb 2011 06:08 PM (UTC) by Zeno
|
| Message
| I'm trying to remember how to get cores to dump.
I have C code which gets compiled and run like a MUD, but it's threaded (which makes gdb difficult).
I'm not getting any cores being dumped.
ulimit:
core file size (blocks, -c) 16384
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
max locked memory (kbytes, -l) unlimited
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 7168
virtual memory (kbytes, -v) unlimited
Makefile uses -D_REENTRANT -g -o execname -pthread -lm on obj files and -D_REENTRANT -c -g on source files
Or maybe my program isn't seg faulting. |
Zeno McDohl,
Owner of Bleached InuYasha Galaxy
http://www.biyg.org | | Top |
|
| Posted by
| Nick Gammon
Australia (23,120 posts) Bio
Forum Administrator |
| Date
| Reply #1 on Thu 24 Feb 2011 08:47 PM (UTC) |
| Message
| You're not sure if it's segfaulting? Is there no message?
How do threads stop gdb anyway? A quick Google seems to indicate it may be able to handle that.
Maybe your program is looping rather than seg faulting. Anyway, can you do a "ps" and see if it is running or not? |
- Nick Gammon
www.gammon.com.au, www.mushclient.com | | Top |
|
| Posted by
| Zeno
USA (2,871 posts) Bio
|
| Date
| Reply #2 on Thu 24 Feb 2011 08:53 PM (UTC) |
| Message
| I was getting reports that a players instance of the game crashed, so I was assuming it was segfaults.
The issue with threads is that I don't know which thread to attach to in gdb. Nor do I know what's causing the crash.
So I'm hoping to have core dumps. |
Zeno McDohl,
Owner of Bleached InuYasha Galaxy
http://www.biyg.org | | Top |
|
| Posted by
| David Haley
USA (3,881 posts) Bio
|
| Date
| Reply #3 on Fri 25 Feb 2011 02:15 PM (UTC) |
| Message
| | It's pretty easy to test if your environment is set up for core dumps: just write a program that should dump a core, like assert(0) or a null pointer deref or something. |
David Haley aka Ksilyan
Head Programmer,
Legends of the Darkstone
http://david.the-haleys.org | | Top |
|
| Posted by
| Zeno
USA (2,871 posts) Bio
|
| Date
| Reply #4 on Sat 26 Feb 2011 03:16 AM (UTC) |
| Message
| Environment is setup for cores dumping it seems.
Guess I need to figure out what this 11+ year old code is doing. |
Zeno McDohl,
Owner of Bleached InuYasha Galaxy
http://www.biyg.org | | Top |
|
| Posted by
| Nick Gammon
Australia (23,120 posts) Bio
Forum Administrator |
| Date
| Reply #5 on Sat 26 Feb 2011 06:13 AM (UTC) |
| Message
| | People use the word "crash" in strange ways. I would get more details. For example, it might be looping. |
- Nick Gammon
www.gammon.com.au, www.mushclient.com | | Top |
|
| Posted by
| Zeno
USA (2,871 posts) Bio
|
| Date
| Reply #6 on Sun 27 Feb 2011 08:27 PM (UTC) |
| Message
| Well I have this cron that runs:
#!/bin/bash
ps x > /tmp/ps.txt
grep "phantasia/bin/phantasia" /tmp/ps.txt > /dev/null
rc=$?
now=`date`
if [ $rc != "0" ]
then
nohup "phantasia/bin/phantasia" &
echo "$now - started phantasia server" >> ~/game.log
else
count=`grep "phantasia/bin/phantasia" /tmp/ps.txt | wc -l`
let count="$count - 2"
echo "$now - $count game(s) running" >> ~/game.log
# vmstat 10 3 >> game.log
# echo >> game.log
fi
rm /tmp/ps.txt
exit 0
Quote:
Sun Feb 27 07:45:01 EST 2011 - 1 game(s) running
Sun Feb 27 08:00:01 EST 2011 - started phantasia server
Sun Feb 27 08:15:01 EST 2011 - started phantasia server
Sun Feb 27 08:30:01 EST 2011 - 1 game(s) running
So it is dying, I just have to figure out in what way. |
Zeno McDohl,
Owner of Bleached InuYasha Galaxy
http://www.biyg.org | | Top |
|
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