03:14 <promach> fche: what else did I miss ? I have already put riffa.ko in /lib/modules/4.18.6-041806-generic/kernel/drivers/riffa/riffa.ko

11:53 <fche> that ought to be it

11:53 <fche> promach, can try again with stap -vvv to see if it finds this file properly

12:00 <promach> fche: see https://gist.github.com/promach/62b4646f410cf2ee6ec7d7b408a32935#file-stap_riffa-log-L1001-L1009

12:09 <fche> lines 490ish of that trace look promising; it's finding the source location of that function

12:11 <fche> would you be able to share that riffa.ko file?

12:11 <promach> fche: your email please, sir ?

12:11 <fche> fche@redhat.com e.g.

12:14 <promach> fche: I have sent to your email

12:20 <fche> which ubuntu version are you using btw?

12:21 <promach> ubuntu bionic 18.04

12:21 <promach> Linux UbuntuHW15 4.18.6-041806-generic #201809050847 SMP Wed Sep 5 08:49:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

12:22 <promach> fche

12:22 <fche> ok great

12:23 <fche> will try to figure it out this morning.

12:24 <promach> fche: many many thanks to you :)

15:02 <fche> promach, installing my own ubuntu vm here

15:02 <fche> am wondering how you got a hold of that particular kernel and its dbgsum

15:02 <fche> trying uktools to get a 4.18.14 one, but those builds appear to lack debug data entirely ;(

15:02 <fche> http://kernel.ubuntu.com/~kernel-ppa/mainline/ <-- i.e., from that area

17:55 <fche> promach, have some good news and some bad news

17:55 <fche> the good news is that over here, with a freshly built stap out of git master (so release 4), against your riffa.ko module, works to the extent that it can enumerate statements etc.

17:55 <fche> the bad news is that I don't have an explanation why your run didn't work :)

18:25 <fche> http://paste.ubuntu.com/p/xBGmtZyr9y/

18:25 <fche> that's from .../stap -vvv -p4 --example linetimes.stp 'module("./riffa.ko")' '*'