** No longer affects: linux (Ubuntu Lucid)
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Title:
systemtap fails to discover installed debug modules
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** Branch linked: lp:ubuntu/precise-proposed/linux-lowlatency
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Title:
systemtap fails to discover installed debug modules
To manage
This bug was fixed in the package linux - 3.2.0-27.43
---
linux (3.2.0-27.43) precise-proposed; urgency=low
[ Andy Whitcroft ]
* No change upload to fix .ddeb generation in the PPA.
[ Luis Henriques ]
* Release Tracking Bug
- LP: #1020016
linux (3.2.0-27.42)
** Branch linked: lp:ubuntu/precise-proposed/linux-armadaxp
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Title:
systemtap fails to discover installed debug modules
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Great, thanks for testing. Tagging as verified as per comment #24.
** Tags removed: verification-needed-precise
** Tags added: verification-done-precise
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= summary =
* looks good
# apt-get install -t precise-proposed linux-image-generic
# apt-get install -t precise-proposed linux-headers-3.2.0-27-generic
# apt-get install -t precise-proposed linux-image-3.2.0-27-generic-dbgsym
# apt-get install systemtap
# reboot
# zgrep -B2 669641
This bug is awaiting verification that the kernel for Precise in
-proposed solves the problem (3.2.0-27.43). Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-precise' to 'verification-done-precise'.
If verification is not
** Branch linked: lp:ubuntu/linux-lowlatency
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Title:
systemtap fails to discover installed debug modules
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This bug was fixed in the package linux - 3.5.0-2.2
---
linux (3.5.0-2.2) quantal-proposed; urgency=low
[ Andy Whitcroft ]
* rebase to v3.5-rc4
[ Arend van Spriel ]
* SAUCE: (drop after 3.5) brcmsmac: fix NULL pointer crash in
brcms_c_regd_init()
- LP: #950320
[
** Changed in: linux (Ubuntu Precise)
Status: In Progress = Fix Committed
** Changed in: linux (Ubuntu Quantal)
Status: In Progress = Fix Committed
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Ok. I can verify this also works on Quantal. Formatting the SRU.
** No longer affects: systemtap (Ubuntu)
** Also affects: linux (Ubuntu Lucid)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Precise)
Importance: Undecided
Status: New
** Also affects: linux
** Description changed:
+ == Precise SRU Justification ==
+
+ Impact: When using systemtap with Ubuntu kernels, the proper debug
+ modules cannot be automatically discovered.
+
+ == Fix ==
+
+ This fix allows for the build system to insert the .gnu_debuglink
+ sections in the .ko files
Here is the submitted patch.
** Patch added:
0001-UBUNTU-PACKAGING-add-.gnu_debuglink-sections-to-.ko-.patch
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/669641/+attachment/3201017/+files/0001-UBUNTU-PACKAGING-add-.gnu_debuglink-sections-to-.ko-.patch
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The root cause of the build failure under precise was that we were trying to
assign
an entry to debuglink that didn't exist. When the build was iterating over
kos, it simply expects that the path in /lib/modules will mirror that found
in /usr/lib/debug, this is not always true. There are modules
I've developed a test suite to verify this new part of the build but am not
sure how to integrate it. Attached.
** Attachment added: test-gnu_debuglink.sh
https://bugs.launchpad.net/ubuntu/+source/systemtap/+bug/669641/+attachment/3199264/+files/test-gnu_debuglink.sh
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You can download a precise amd64 build here:
Please test this with this package and see if systemtap is working
properly.
http://people.canonical.com/~ppetraki/bug-669641/
I hesitate to upload the ddeb as it's comparable to an iso in size. It's
probably faster to rebuild the kernel than
Got a chance to retest against an officially built kernel and dbgsym, the
technique works, so
now all that's left is to independently verify the entire patch on a new build
and call
it done.
root@ubuntu:~# uname -a
Linux ubuntu 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012
Building against precise is interesting, at first we thought (ayan and myself)
that
we were modifying the same object twice which results in an error. To remedy
that, sort -u was added to the processing loop. After another precise build
with that precaution we get this failure.
MKDIR
The linaro patch alone doesn't work. objcopy fails. I'll upload the exact
build error.
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Title:
systemtap fails to discover installed debug
@Chris, this doesn't work.
BTW, you don't have to bounce this back to me to verify, this is
a one line test, either the probed module will return a list of
entry points, or it won't. Also, please provide the main headers
package next time, the archive is marching on and deleted the
last build.
OK, so I think you have a build issue, as I can add the run the objcopy
line alone and verify the heading was added.
root@ubuntu:/usr/lib/debug# lsb_release -r
Release:12.04
root@ubuntu:/usr/lib/debug# uname -a
Linux ubuntu 3.4.0-3-generic #7~lp669641v201205242144 SMP Thu May 24 21:45:43
** Changed in: linux (Ubuntu)
Assignee: Tim Gardner (timg-tpi) = Chris J Arges (christopherarges)
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Title:
systemtap fails to discover
** Changed in: linux (Ubuntu)
Importance: Undecided = Medium
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Title:
systemtap fails to discover installed debug modules
To manage
Thank you for triaging this. Do I understand it correctly that you are
going to fix this in the kernel package and I don't need to change
anything in systemtap packaging?
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This patch is taken from the Linaro packaging patch, I'm building the
.debs now for testing.
** Patch added:
0001-UBUNTU-PACKAGING-add-.gnu_debuglink-sections-to-.ko-.patch
You can download a quantal amd64 build here:
http://people.canonical.com/~arges/lp669641/
Please test this with this package and see if systemtap is working properly.
--chris
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The attachment 0001-UBUNTU-PACKAGING-add-.gnu_debuglink-sections-
to-.ko-.patch of this bug report has been identified as being a patch.
The ubuntu-reviewers team has been subscribed to the bug report so that
they can review the patch. In the event that this is in fact not a
patch you can resolve
** Changed in: linux (Ubuntu)
Assignee: (unassigned) = Chris J Arges (christopherarges)
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Title:
systemtap fails to discover installed debug
** Changed in: linux (Ubuntu)
Assignee: Chris J Arges (christopherarges) = Tim Gardner (timg-tpi)
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Title:
systemtap fails to discover
Fixed at the linux-linaro packages by commit:
http://git.linaro.org/gitweb?p=ubuntu/linux-linaro-oneiric.git;a=commitdiff;h=4a0c288fa1eddb0b9183f5169c88cef8db99ff54;hp=8035803c27c612dde7607c33dfd8d96f3c53cdb1
** Changed in: linaro-ubuntu
Status: In Progress = Fix Released
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** Also affects: linaro-ubuntu
Importance: Undecided
Status: New
** Changed in: linaro-ubuntu
Status: New = In Progress
** Changed in: linaro-ubuntu
Importance: Undecided = High
** Changed in: linaro-ubuntu
Assignee: (unassigned) = John Rigby (jcrigby)
** Changed in:
** Changed in: linux-2.6 (Debian)
Status: Unknown = Fix Released
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Title:
systemtap fails to discover installed debug modules
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** Also affects: linux-2.6 (Debian) via
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=49
Importance: Unknown
Status: Unknown
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** Bug watch added: Debian Bug tracker #49
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=49
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Title:
systemtap fails to discover
Ritesh, can you provide a pointer to the details?
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Hello Frank,
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=49
This bug report should have all the information.
Ritesh
On 11/03/2010 01:10 AM, Frank Ch. Eigler wrote:
Ritesh, can you provide a pointer to the details?
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Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
** Patch added: failing strace output
https://bugs.launchpad.net/bugs/669641/+attachment/1719924/+files/tapprobe.out
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systemtap fails to discover installed debug modules
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eu-readelf is provided by elfutils and is required to run the attached
script.
** Attachment added: build id fixup script
https://bugs.launchpad.net/ubuntu/+source/systemtap/+bug/669641/+attachment/1719925/+files/fixup-buildid.sh
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systemtap fails to discover installed debug modules
added a kernel task for this. Will investigate and go from there.
~JFo
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: New = Triaged
** Tags added: kernel-core
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systemtap fails to discover installed debug modules
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