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[Bug translator/2643] probe point wildcard expansion excessively optimistic
- From: "fche at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 5 May 2006 23:29:31 -0000
- Subject: [Bug translator/2643] probe point wildcard expansion excessively optimistic
- References: <20060505231141.2643.hien@us.ibm.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From fche at redhat dot com 2006-05-05 23:29 -------
The patch for bug #2433 awakened a latent bug in the translator that expands
probe point wildcards. The same problem appears with this case:
probe a.a.a = begin { }
probe a.b = begin { }
probe a.*.a { }
The wildcard should expand to "a.a.a" only, but since it proceeds naively one
component at a time and lacks lookahead, it also expands to "a.b.a".
One quick hack as a workaround until the real fix is to add back some dummy
probe aliases for the two recently deceased.
probe syscall.exit.return = end {}
probe syscall.exit_group.return = end {}
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |eteo at redhat dot com
Summary|Translator fails pass 2 if |probe point wildcard
|probe alias does not have |expansion excessively
|the matching .return alias |optimistic
http://sourceware.org/bugzilla/show_bug.cgi?id=2643
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