Re: [PATCH] Add --core-pattern option to eu-stack

[Mark Wielaard <mjw@redhat.com>]

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On Thu, 2014-11-27 at 22:41 +0100, Jan Kratochvil wrote:
> I just find it improbable one would not need a single other kind of
> information than what eu-stack can provide.

FWIW I found it useful. All other core_pattern programs I have seen seem
somewhat bloated and I normally deinstall them. It is nice to have a
small light-weight and quick core_pattern filter that just dumps the
exiting/crashing backtrace in a file and does nothing else. IMHO.

I don't think any distro would install it as standard core_pattern
filter, they probably go with abrt or systemd-coredump to get all the
fancy output. But for a hacker box it seems a nice thing to have around.

> > But if --core-pattern isn't useful without other code, then we should
> > include that code too.
> 
> Yes, there could be provided some "contrib"-like core dumping shell script.
> 
> 
> > Could you post what you have?
> 
> Nothing interesting, only for debugging eu-stack --core-pattern, when you ask:
> 	#! /bin/bash
> 	exec >>/tmp/out 2>>/tmp/out
> 	date --iso=seconds
> 	echo "$*"
> 	cd /home/jkratoch/redhat/elfutils
> 	. /home/jkratoch/t/elfutils-boot
> 	ldd ./src/stack
> 	# It locks up as strace holds fd 0:
> 	#strace -s200 -o /tmp/out.strace -q ./src/stack --core-pattern -1 --pid=$1
> 	exec ./src/stack --core-pattern -1 -l -m --pid=$1

So the missing functionality really is just redirecting the output (and
stderr)? What is in elfutils-boot?

BTW I was just using:
/usr/bin/eu-stack --core-pattern -v --p %i -o /proc/%p/cwd/%i.stack
without any shell wrapper.

Cheers,

Mark