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[Bug translator/6594] investigate ftrace interface
- From: "mhiramat at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 2 Oct 2008 15:27:52 -0000
- Subject: [Bug translator/6594] investigate ftrace interface
- References: <20080605020729.6594.fche@redhat.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From mhiramat at redhat dot com 2008-10-02 15:27 -------
(In reply to comment #1)
> probably needs kernel changes for:
> ... module-friendly ftrace registration api
I think this should be done by simply exporting
register/unregister_ftrace_function().
> ... and a data (argument) passing mechanism
Arguments passing is hard because of mcount implementation.
It will give us just caller ip and callee ip.
So, in the first phase, might we support only $caller and $callee in
ftrace-based probe?
--
http://sourceware.org/bugzilla/show_bug.cgi?id=6594
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