Messages in this thread |  | | Date | Wed, 22 Oct 2014 08:02:23 +0200 (CEST) | From | Jiri Kosina <> | Subject | Re: [PATCH] kprobes: add kprobe_is_function_probed() |
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On Wed, 22 Oct 2014, Masami Hiramatsu wrote:
> > Add a function that allows external users (such as live patching > > mechanisms) to check whether a given function (identified by symbol name) > > has a kprobe installed in it. > > Actually, we've already exported the list of kprobes with probe points > (symbols) via debugfs. Please check /sys/kernel/debug/kprobes/list :)
Yes, I know, and kprobe_is_function_probed() is performing very similar thing that show_kprobe_addr() is doing. But we'd like to be able to check this from within a kernel module (the patch module) and issue WARN().
Otherwise we'll need to have a machinery in userspace before insmod which will look up the functions in the module and compare them to the debufs-provided interface.
Also, I don't think we want to be dependent on debugfs being mounted and discoverable, etc ...
Thanks Masami,
-- Jiri Kosina SUSE Labs
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