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[Bug translator/13009] Allow @defined($foo) in probe predicates
- From: "fche at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Wed, 20 Jul 2011 22:31:21 +0000
- Subject: [Bug translator/13009] Allow @defined($foo) in probe predicates
- Auto-submitted: auto-generated
- References: <bug-13009-6586@http.sourceware.org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=13009
Frank Ch. Eigler <fche at redhat dot com> changed:
What |Removed |Added
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CC| |fche at redhat dot com
--- Comment #1 from Frank Ch. Eigler <fche at redhat dot com> 2011-07-20 22:30:40 UTC ---
"But this gives "semantic error: unexpected @defined". "
That's odd - the code should accept pretty general expressions.
"Once @defined is allowed in the predicate, we can further optimize that
predicate == 0 throws the whole body away"
Sure, or delete the probe directly.
"and probes with empty bodies are discarded entirely."
That's bug #11353.
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