systemtap does not work on wily kernel, hrtimer_get_res

Bug #1547644 reported by Dan Streetman on 2016-02-19
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
systemtap (Ubuntu)
High
Dan Streetman
Wily
High
Dan Streetman

Bug Description

[Impact]

Attempting to use systemtap with any timer on wily fails with:

In file included from /usr/share/systemtap/runtime/timer.c:17:0,
                 from /tmp/stapNgYUlz/stap_d73751f21cb6a8e35c1e92f712612cc2_4574_src.c:869:
/usr/share/systemtap/runtime/linux/timer.c: In function ‘_stp_hrtimer_init’:
/usr/share/systemtap/runtime/linux/timer.c:19:2: error: implicit declaration of function ‘hrtimer_get_res’ [-Werror=implicit-function-declaration]
  hrtimer_get_res (CLOCK_MONOTONIC, &res);
  ^

[Test Case]

on a wily system that's running the wily kernel, with the kernel dbgsym installed, simply create a dummy stap script that uses a timer and try to run it, e.g.:

$ cat test.stap
#!/usr/bin/stap

probe timer.sec(1) {
  println("tick")
}
$ sudo stap test.stap

the above compilation failure will happen.

[Regression Potential]

As the commit only changes the way systemtap uses the kernel timer function, and it already fails now, there is no regression potential.

[Other Info]

this requires upstream systemtap commit 86f726b7785a035a2d6bc9ec2642c46621587d23

Dan Streetman (ddstreet) on 2016-02-19
Changed in systemtap (Ubuntu):
status: New → Fix Committed
Changed in systemtap (Ubuntu Wily):
status: New → In Progress
Changed in systemtap (Ubuntu):
assignee: nobody → Dan Streetman (ddstreet)
Changed in systemtap (Ubuntu Wily):
assignee: nobody → Dan Streetman (ddstreet)
Changed in systemtap (Ubuntu):
status: Fix Committed → Fix Released
Dan Streetman (ddstreet) on 2016-02-19
tags: added: sts
Dan Streetman (ddstreet) wrote :

debdiff containing above commit

Dan Streetman (ddstreet) wrote :

this can be reproduced with any stap script using a timer, e.g.:

#!/usr/bin/stap

probe timer.sec(1) {
  println("tick")
}

tags: added: sts-sru
Dan Streetman (ddstreet) on 2016-03-16
description: updated
Changed in systemtap (Ubuntu):
importance: Undecided → High
Changed in systemtap (Ubuntu Wily):
importance: Undecided → High
Dan Streetman (ddstreet) wrote :

systemtap patched with attached debdiff tested and verified to fix the compilation error.

Hello Dan, or anyone else affected,

Accepted systemtap into wily-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/systemtap/2.8-2ubuntu1.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Changed in systemtap (Ubuntu Wily):
status: In Progress → Fix Committed
tags: added: verification-needed
Dan Streetman (ddstreet) on 2016-03-23
tags: added: verification-done
removed: verification-needed
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package systemtap - 2.8-2ubuntu1.1

---------------
systemtap (2.8-2ubuntu1.1) wily; urgency=medium

  * debian/patches/0001-Fixed-PR18634-by-getting-timer-probes-to-compile-on-.patch:
    - Build for wily kernel. LP: #1547644

 -- Dan Streetman <email address hidden> Fri, 18 Mar 2016 16:58:14 +0100

Changed in systemtap (Ubuntu Wily):
status: Fix Committed → Fix Released

The verification of the Stable Release Update for systemtap has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

Louis Bouchard (louis) on 2016-11-09
tags: removed: sts-sru
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