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[Bug uprobes/12275] uretprobes break exception handling
- From: "fche at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: Tue, 7 Dec 2010 03:46:40 +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 #10 from Frank Ch. Eigler <fche at redhat dot com> 2010-12-07 03:46:08 UTC ---
(In reply to comment #9)
> (In reply to comment #7)
> > For reference, another short-term hack would be to disarm
> > some or all uretprobes while an exception dispatch is in
> > progress.
>
> 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".)
> Then there's the matter of hooking exception dispatch itself. [...]
> And some point also to know that exception dispatch is finished.
Yes, a few extra uprobes would have to be placed, with awareness of
libstdc++/libgcc internals.
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