From: "ocket8888 at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sourceware.org
Subject: [Bug kprobes/22772] missing kernel/module debuginfo for custom lt kernel
Date: Thu, 01 Feb 2018 21:02:00 -0000 [thread overview]
Message-ID: <bug-22772-6586-rjmhWZIVwU@http.sourceware.org/bugzilla/> (raw)
In-Reply-To: <bug-22772-6586@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=22772
--- Comment #10 from ocket8888 <ocket8888 at gmail dot com> ---
(In reply to David Smith from comment #4)
> (In reply to ocket8888 from comment #0)
> > Created attachment 10770 [details]
> > kernel configuration
> >
> > I've been trying (and failing) to get systemtap to work on my CentOS machine.
> > ```
> > $ uname -a
> > Linux ipcdn-cache-51.cdnlab.comcast.net 4.9.70-1.el7.centos.x86_64 #1
> > SMP Thu Feb 1 15:34:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
> > $ cat /etc/centos-release```
> > CentOS Linux release 7.4.1708 (Core)
> > $ stap --version
> > Systemtap translator/driver (version 3.1/0.168, rpm 3.1-5.el7_4)
> > Copyright (C) 2005-2017 Red Hat, Inc. and others
> > This is free software; see the source for copying conditions.
> > tested kernel versions: 2.6.18 ... 4.10-rc8
> > enabled features: AVAHI BOOST_STRING_REF DYNINST JAVA PYTHON2 LIBRPM
> > LIBSQLITE3 LIBVIRT LIBXML2 NLS NSS READLINE
> > ```
> >
> > I'm attaching the configuration used to build the kernel, note that it
> > follows the configuration specified in the FAQ (Q2). When I run the test
> > command `stap -ve 'probe vfs.read{exit()}` it outputs
> >
> > ```
> > Pass 1: parsed user script and 529 library scripts using
> > 378212virt/192180res/6484shr/188296data kb, in 2030usr/40sys/2078real ms.
> > semantic error: while resolving probe point: identifier 'kernel' at
> > /usr/share/systemtap/tapset/linux/vfs.stp:915:18
> > source: probe vfs.read = kernel.function("vfs_read")
> > ^
> >
> > semantic error: missing x86_64 kernel/module debuginfo [man
> > warning::debuginfo] under '/lib/modules/4.9.70-1.el7.centos.x86_64/build'
>
> Interesting. I'm betting the '-lt' tag is going to show up in the filenames
> installed by one (or more) of the kernel-lt packages. Pay close attention to
> the following packages: kernel-lt, kernel-lt-debuginfo, and kernel-lt-devel.
> Does '-lt' show up in any of the filenames from those packages?
>
> If so, an semi-easy workaround here would be to create a symbolic link from
> the path systemtap expects to the path containing '-lt'.
>
> If I'm right, I'm not sure what the best solution to this problem would be
> in systemtap to automatically recognize the '-lt' kernels.
Here's what I got:
```
$ repoquery -l kernel-lt-`uname -r` | grep -e "-lt"
/etc/ld.so.conf.d/kernel-lt-4.9.70-1.el7.centos.x86_64.conf
```
the devel package installs nothing with '-lt' in the name, while the debuginfo
package dumped too much stuff to paste, but what might be the issue is
everything it puts under /usr/src is under a 'kernel-lt-4.9.70' directory.
--
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next prev parent reply other threads:[~2018-02-01 21:02 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-01 18:31 [Bug kprobes/22772] New: " ocket8888 at gmail dot com
2018-02-01 18:52 ` [Bug kprobes/22772] " ocket8888 at gmail dot com
2018-02-01 18:53 ` ocket8888 at gmail dot com
2018-02-01 18:54 ` ocket8888 at gmail dot com
2018-02-01 19:29 ` dsmith at redhat dot com
2018-02-01 19:48 ` fche at redhat dot com
2018-02-01 20:53 ` ocket8888 at gmail dot com
2018-02-01 20:54 ` ocket8888 at gmail dot com
2018-02-01 20:55 ` ocket8888 at gmail dot com
2018-02-01 20:57 ` fche at redhat dot com
2018-02-01 21:02 ` ocket8888 at gmail dot com [this message]
2018-02-01 21:06 ` ocket8888 at gmail dot com
2018-02-01 21:07 ` ocket8888 at gmail dot com
2018-02-01 21:17 ` ocket8888 at gmail dot com
2018-02-01 22:38 ` dsmith at redhat dot com
2018-02-02 17:21 ` ocket8888 at gmail dot com
2018-02-02 17:23 ` fche at redhat dot com
2018-02-02 17:55 ` ocket8888 at gmail dot com
2018-02-02 17:56 ` ocket8888 at gmail dot com
2018-02-02 20:43 ` dsmith at redhat dot com
2018-02-06 16:20 ` ocket8888 at gmail dot com
2018-02-06 16:20 ` ocket8888 at gmail dot com
2018-02-06 16:23 ` ocket8888 at gmail dot com
2018-02-06 18:40 ` dsmith at redhat dot com
2021-08-06 1:28 ` lennordocdoc0921 at gmail dot com
2021-08-06 8:13 ` mark at klomp dot org
2021-08-06 12:07 ` dsmith at redhat dot com
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