* [Bug translator/27410] New: rpm-set path based probes
@ 2021-02-13 0:00 fche at redhat dot com
2021-02-13 0:01 ` [Bug translator/27410] " fche at redhat dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: fche at redhat dot com @ 2021-02-13 0:00 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=27410
Bug ID: 27410
Summary: rpm-set path based probes
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: translator
Assignee: systemtap at sourceware dot org
Reporter: fche at redhat dot com
Target Milestone: ---
Bug #25568's introduced capabilities to specify probes by build-id, but this is
not very user friendly. What users tend to see directly are file names, and
occasionally filenames from archives that are not even installed.
The attachment is a demonstration prototype for a stap front-end that can take
a path name and a list of RPM-containing directories. It computes a
buildid-based script template based on finding all buildids for the given path
name in any of the RPMs found, and then compiles than via stap -p4. It uses a
temporary instance of debuginfod to build/serve the buildid executables /
debuginfo.
% sh stap-multirpm /usr/bin/vi /path/to/RPMs
[starts debuginfod -R /path/to/RPMs ...]
[chance to edit template SCRIPT.stp]
[compiles to stap_hexcode.ko]
[kills debuginfod]
% sudo staprun stap_hexcode.ko &
% /usr/bin/vi # of any version from any of those RPMs
[watch stap probe hit]
We should consider growing some native systemtap syntax for this. Suggestions
welcome. Possibility:
probe rpmsearch("/path/to/RPMs/prefix*").process("/path/name").function(...) {
}
probe debsearch(...) { }
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* [Bug translator/27410] rpm-set path based probes
2021-02-13 0:00 [Bug translator/27410] New: rpm-set path based probes fche at redhat dot com
@ 2021-02-13 0:01 ` fche at redhat dot com
2022-09-07 17:47 ` rgoldber at redhat dot com
2023-08-31 13:57 ` rgoldber at redhat dot com
2 siblings, 0 replies; 4+ messages in thread
From: fche at redhat dot com @ 2021-02-13 0:01 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=27410
Frank Ch. Eigler <fche at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fche at redhat dot com
--- Comment #1 from Frank Ch. Eigler <fche at redhat dot com> ---
Created attachment 13221
--> https://sourceware.org/bugzilla/attachment.cgi?id=13221&action=edit
proof of concept shell script
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* [Bug translator/27410] rpm-set path based probes
2021-02-13 0:00 [Bug translator/27410] New: rpm-set path based probes fche at redhat dot com
2021-02-13 0:01 ` [Bug translator/27410] " fche at redhat dot com
@ 2022-09-07 17:47 ` rgoldber at redhat dot com
2023-08-31 13:57 ` rgoldber at redhat dot com
2 siblings, 0 replies; 4+ messages in thread
From: rgoldber at redhat dot com @ 2022-09-07 17:47 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=27410
Ryan Goldberg <rgoldber at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rgoldber at redhat dot com
--- Comment #2 from Ryan Goldberg <rgoldber at redhat dot com> ---
Created attachment 14322
--> https://sourceware.org/bugzilla/attachment.cgi?id=14322&action=edit
Submit A Patch for 27410
The following expands on the original proposal. This patch allows for the user
to probe processes similarly to regular process("PATH").** probes but instead
searches the current federation of debuginfod servers instead of the host file
system.
The new syntax which would achieve the original task is as follows:
$ debuginfod -R /path/to/RPMs/prefix
$ env DEBUGINFOD_URLS=http://localhost:8002/ stap -e
'probe debuginfod.process("/path/name").function(...) { }'
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* [Bug translator/27410] rpm-set path based probes
2021-02-13 0:00 [Bug translator/27410] New: rpm-set path based probes fche at redhat dot com
2021-02-13 0:01 ` [Bug translator/27410] " fche at redhat dot com
2022-09-07 17:47 ` rgoldber at redhat dot com
@ 2023-08-31 13:57 ` rgoldber at redhat dot com
2 siblings, 0 replies; 4+ messages in thread
From: rgoldber at redhat dot com @ 2023-08-31 13:57 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=27410
Ryan Goldberg <rgoldber at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Ryan Goldberg <rgoldber at redhat dot com> ---
commit a2d19c8670690f87ee74db4a106829aa8edefbce
Author: Ryan Goldberg <rgoldber@redhat.com>
Date: Fri, 25 Aug 2023 14:20:09 +0000 (10:20 -0400)
PR27410: Probe processes using debuginfod
New tapset which allows for process
probing using executables/debuginfo
stored in debuginfod servers.
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2021-02-13 0:00 [Bug translator/27410] New: rpm-set path based probes fche at redhat dot com
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2022-09-07 17:47 ` rgoldber at redhat dot com
2023-08-31 13:57 ` rgoldber at redhat dot com
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