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[Bug uprobes/12275] uretprobes break exception handling
- From: "jistone at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: Tue, 7 Dec 2010 04:17:14 +0000
- Subject: [Bug uprobes/12275] uretprobes break exception handling
- Auto-submitted: auto-generated
- References: <bug-12275-1110@http.sourceware.org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=12275
--- Comment #11 from Josh Stone <jistone at redhat dot com> 2010-12-07 04:17:01 UTC ---
(In reply to comment #10)
> > I mentioned this idea to Jim, and he told me that it's not a simple thing to
> > disarm uretprobes.
>
> (Sacrificing more performance then, "temporarily remove" instead of "disarm".)
I clarified this with Frank, but for reference -- we have no such mechanism, no
matter what you would call it. Even when stap completely removes its probes,
uprobes must hang on to in-flight uretprobe instances, since there's no easy
way to clean up all the return addresses except to let them trigger.
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