16:45 <imjorge> hi! trying this script with `stap test.stp`

16:45 <imjorge> root@vm-devops:~# cat test.stp

16:45 <imjorge> #! /usr/bin/env stap

16:45 <imjorge> probe oneshot { println("hello world") }

16:45 <imjorge> but getting this error:

16:45 <imjorge> root@vm-devops:~# stap test.stp

16:45 <imjorge> parse error: expected literal string or number

16:45 <imjorge> saw: operator ')' at test.stp:2:13

16:45 <imjorge> source: probe begin() {

16:45 <imjorge> ^

16:45 <imjorge> 1 parse error.

16:45 <imjorge> Pass 1: parse failed. [man error::pass1]

16:45 <imjorge> Tip: /usr/share/doc/systemtap/README.Debian should help you get started.

16:45 <imjorge> root@vm-devops:~# vim test.stp

16:45 <imjorge> root@vm-devops:~# stap test.stp

16:45 <imjorge> semantic error: while resolving probe point: identifier 'oneshot' at test.stp:2:7

16:45 <imjorge> source: probe oneshot { println("hello world") }

16:45 <imjorge> ^

16:45 <imjorge> semantic error: probe point mismatch (alternatives: __nd_syscall __nfs __scheduler __signal __tcpmib __vm _linuxmib _nd_syscall _signal _sunrpc _syscall _vfs begin begin(number) end end(number) error error(number) generic ioblock ioblock_trace ioscheduler ioscheduler_trace ipmib irq_handler kernel kprobe kprocess linuxmib module(string) nd_syscall netdev netfilter never nfs nfsd perf process process(number) process(string) procfs

16:46 <imjorge> procfs(string) scheduler scsi signal socket softirq stap staprun sunrpc syscall tcp tcpmib timer tty udp vfs vm workqueue): identifier 'oneshot' at :2:7

16:46 <imjorge> source: probe oneshot { println("hello world") }

16:46 <imjorge> ^

16:46 <imjorge> Pass 2: analysis failed. [man error::pass2]

16:46 <imjorge> Tip: /usr/share/doc/systemtap/README.Debian should help you get started.

16:46 <imjorge> root@vm-devops:~# lsb_release -a

16:46 <imjorge> No LSB modules are available.

16:46 <imjorge> Distributor ID: Ubuntu

16:46 <imjorge> Description: Ubuntu 14.04.4 LTS

16:46 <imjorge> Release: 14.04

16:46 <imjorge> Codename: trusty

16:46 <imjorge> root@vm-devops:~# arch

16:46 <imjorge> x86_64

16:46 <imjorge> what am i missing?

16:46 <imjorge> picked the example from systemtap website

16:51 <flu__> imjorge, what is your stap version?

16:51 <flu__> stap --version

16:51 <imjorge> Systemtap translator/driver (version 2.3/0.158, Debian version 2.3-1ubuntu1.4 (trusty))

16:51 <imjorge> flu__: ^

16:51 <imjorge> installed with `apt-get install systemtap`

16:52 <flu__> oneshot is only available after version 2.5

16:52 <imjorge> hmmm k

16:52 <flu__> try 'probe begin {println("hello world")}'

16:52 <flu__> no () after the begin

16:53 <imjorge> flu__: it works

16:53 <imjorge> now, a more convuluted one

16:54 <imjorge> # cat test.stp

16:54 <imjorge> #!/usr/bin/stap

16:54 <imjorge> if (sig_name == "SIGKILL")

16:54 <imjorge> probe signal.send {

16:54 <imjorge> printf("%s was sent to %s (pid:%d) by %s uid:%d\n", sig_name, pid_name, sig_pid, execname(), uid())

16:54 <imjorge> }

16:54 <imjorge> root@vm-devops:~# stap test.stp

16:54 <imjorge> WARNING: "__tracepoint_signal_generate" [/tmp/stapzy6pTl/stap_7d728fb18b0031e4ab338addb8e89e50_17439.ko] undefined!

16:54 <imjorge> ERROR: Couldn't insert module '/tmp/stapzy6pTl/stap_7d728fb18b0031e4ab338addb8e89e50_17439.ko': Unknown symbol in module

16:54 <imjorge> WARNING: /usr/bin/staprun exited with status: 1

16:54 <imjorge> Pass 5: run failed. [man error::pass5]

16:54 <imjorge> Tip: /usr/share/doc/systemtap/README.Debian should help you get started.

16:54 <imjorge> root@vm-devops:~# cat test.stp

16:54 <imjorge> #!/usr/bin/stap

16:54 <imjorge> probe signal.send {

16:54 <imjorge> if (sig_name == "SIGKILL")

16:54 <imjorge> printf("%s was sent to %s (pid:%d) by %s uid:%d\n", sig_name, pid_name, sig_pid, execname(), uid())

16:54 <imjorge> }

16:54 <imjorge> also some version thing?

16:54 <imjorge> these errors are hard to discern

16:55 <flu__> do you have debuginfo installed?

16:56 <imjorge> no

16:57 <flu__> you probably would want to install it

16:57 <flu__> see https://www.sourceware.org/systemtap/SystemTap_Beginners_Guide/using-systemtap.html

16:58 <imjorge> let me try, tx

17:15 <fche> imjorge, when the version of stap you run is significantly older than the version of the kernel you run, things start breaking

17:15 <imjorge> fche: how do you go on installing systemtap?

17:16 <imjorge> i did with apt-get, perhaps need to do differently?

17:16 <fche> apt-get gets you the version from your distro's maintainers

17:17 <fche> what version of debian are you running?

17:20 <imjorge> fche: Ubuntu 14.04.4 LTS

17:22 <imjorge> also, flu__ installing the debug info did not seem to work

17:25 <fche> on my ubuntu 14.04 lts vm

17:26 <fche> things basically work:

17:26 <fche> % uname -a

17:26 <fche> Linux vm-ubuntu14 4.2.0-27-generic #32~14.04.1-Ubuntu SMP Fri Jan 22 15:32:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

17:26 <fche> % stap -V

17:26 <fche> Systemtap translator/driver (version 2.3/0.158, Debian version 2.3-1ubuntu1.4 (trusty))

17:26 <fche> what kernel version are you running?

17:33 <jistone> jeez, even stap-2.3 and linux-4.2 are 2 years apart

17:33 <jistone> actually, linux-4.2 is newer than "14.04" would imply -- do they rebase kernels in lts?

17:33 <fche> yup, sometimes

17:33 <jistone> scary

17:33 <fche> and they backport some newer-kernel-compatibility patches into older stap

17:33 <jistone> :)

17:34 <jistone> ah, ok, if they do patch stap then it could work

21:06 <irker174> systemtap: flu systemtap.git:refs/heads/master * release-3.0-33-g51739ee / staprun/monitor.c: monitor mode: bugfix http://tinyurl.com/hr43aww

21:10 <irker174> systemtap: fche systemtap.git:refs/heads/master * release-3.0-34-g14a09f0 / staprun/staprun.c: staprun: reinstate -d '*' operation http://tinyurl.com/jb47389