Enable core file dumps when an application crashes or segmentation faults

[JonathanLee]

@stephenw10 that swap file it creates is not readable it’s compiled information also. Just a side note

[stephenw10]

If a process aborts and creates a core file you should see something like:

Mar 19 23:14:22 	kernel 		pid 76582 (php-fpm), jid 0, uid 0: exited on signal 11 (core dumped) 

May  7 15:15:47 fw1 kernel: pid 65129 (pftop), jid 0, uid 0: exited on signal 6 (core dumped)

[JonathanLee]

@stephenw10 do you know how or what commands are used to manually trigger it for squid?

[stephenw10]

Nope not something I've ever tried. Did you try the command they gave you?

[stephenw10]

@JonathanLee said in Enable core file dumps when an application crashes or segmentation faults:

coredump_dir /root

Where did you set that?

[JonathanLee]

@stephenw10 yes it showed blank from command input in GUI it killed the process but no core file it didn’t generate one when I used that command

I am going to try this one recommend by a freeBSD forum user

killall -11 squid worked for me (as root)

[JonathanLee]

@stephenw10 advanced options on squid configure gui area, it takes when I run squid -k parse also

[stephenw10]

It tries to dump the core for both the main and child squid processes here but fails with:

Jun 12 19:02:08 	kernel 		pid 80887 (squid), jid 0, uid 0: exited on signal 6 (no core dump - bad address)
Jun 12 19:01:48 	kernel 		pid 33418 (squid), jid 0, uid 100: exited on signal 6 (no core dump - bad address) 

[JonathanLee]

@stephenw10 that looks like a permissions issue with Squid I wonder if we set it to squid logs location if that would work? Bad address? Does it mean path?

[stephenw10]

Yes I assume it's trying to dump somewhere it can't or has nothing configured.

I don't expect to set that value in the Squid config. It shows the same for other processes. Seems like a FreeBSD env value missing.

[JonathanLee]

@stephenw10 I bet it is like field of dreams for code, if you code it developers will come…

[JonathanLee]

@stephenw10

killall -11 squid

mine shows no information on core anything...

Jun 12 12:11:40 kernel pid 84728 (squid), jid 0, uid 100: exited on signal 6
Jun 12 12:11:40 kernel pid 84677 (squid), jid 0, uid 0: exited on signal 11

[JonathanLee]

@stephenw10 try to put it in quotes like this

coredump_dir "/var/squid/logs"

[JonathanLee]

could this be my issue with it not even trying?

[stephenw10]

@JonathanLee said in Enable core file dumps when an application crashes or segmentation faults:

killall -11 squid

mine shows no information on core anything...

Try using kill -6 or kill -11 against the PID rather than all 'squid' processes.

[JonathanLee]

@stephenw10

Jun 12 13:40:58	kernel		pid 88818 (squid), jid 0, uid 100: exited on signal 6
Jun 12 13:40:58	(squid-1)	88818	FATAL: Received Segment Violation...dying. listening port: 192.168.1.1:3128
Jun 12 13:39:43	kernel		pid 51752 (squid), jid 0, uid 100: exited on signal 6
Jun 12 13:39:43	(squid-1)	51752	FATAL: Received Segment Violation...dying.
Jun 12 13:39:11	kernel		pid 17654 (squid), jid 0, uid 100: exited on signal 6
Jun 12 13:38:05	check_reload_status	480	Reloading filter

[stephenw10]

Hmm, are you testing this on your 2100? In 23.09.1?

[JonathanLee]

@stephenw10 No that version disabled my crypt chip I am still on 23.05.01 it is the only version that works for everything I need

[JonathanLee]

@stephenw10 squids uid is squid and we are running commands as root does that matter?

[stephenw10]

Nope that should be fine. This isn't a Squid specific issue, applies to any process I've tested this with. So far.