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[Bug translator/13659] New: blacklisted functions vs. '__kprobes' functions
- From: "dsmith at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Fri, 03 Feb 2012 15:28:40 +0000
- Subject: [Bug translator/13659] New: blacklisted functions vs. '__kprobes' functions
- Auto-submitted: auto-generated
Bug #: 13659
Summary: blacklisted functions vs. '__kprobes' functions
Problem originally pointed out in an email thread:
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:
The problem here is that the blacklist is just a list of names, no address
information is calculated.
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