* [Bug translator/13659] New: blacklisted functions vs. '__kprobes' functions
@ 2012-02-03 15:29 dsmith at redhat dot com
2012-02-03 15:54 ` [Bug translator/13659] " timo.lindfors at iki dot fi
0 siblings, 1 reply; 2+ messages in thread
From: dsmith at redhat dot com @ 2012-02-03 15:29 UTC (permalink / raw)
To: systemtap
http://sourceware.org/bugzilla/show_bug.cgi?id=13659
Bug #: 13659
Summary: blacklisted functions vs. '__kprobes' functions
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: translator
AssignedTo: systemtap@sourceware.org
ReportedBy: dsmith@redhat.com
Classification: Unclassified
Problem originally pointed out in an email thread:
<http://sourceware.org/ml/systemtap/2011-q4/msg00402.html>
When a function can't be probed with kprobes, it is marked with '__kprobes' in
the kernel source. The systemtap translator also has an internal blacklist of
function names that shouldn't be probed.
Unfortunately, the list of blacklisted function names approach doesn't work as
fully as marking a function with '__kprobes':
1) If a function is just blacklisted, a user will still be able to probe
inlines within that function. A user cannot probe inlines within a function
marked with '__kprobes'.
2) A user could user either of the probe types listed below (or any of their
variants) in a function that is only blacklisted:
kernel.function(ADDRESS)
kernel.statement(ADDRESS)
The problem here is that the blacklist is just a list of names, no address
information is calculated.
--
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug translator/13659] blacklisted functions vs. '__kprobes' functions
2012-02-03 15:29 [Bug translator/13659] New: blacklisted functions vs. '__kprobes' functions dsmith at redhat dot com
@ 2012-02-03 15:54 ` timo.lindfors at iki dot fi
0 siblings, 0 replies; 2+ messages in thread
From: timo.lindfors at iki dot fi @ 2012-02-03 15:54 UTC (permalink / raw)
To: systemtap
http://sourceware.org/bugzilla/show_bug.cgi?id=13659
Timo Juhani Lindfors <timo.lindfors at iki dot fi> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |timo.lindfors at iki dot fi
--
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2012-02-03 15:54 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-02-03 15:29 [Bug translator/13659] New: blacklisted functions vs. '__kprobes' functions dsmith at redhat dot com
2012-02-03 15:54 ` [Bug translator/13659] " timo.lindfors at iki dot fi
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).