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[Bug translator/11504] Wrong location for inferred type conflict in error message
- From: "chwang at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 16 Apr 2010 19:36:43 -0000
- Subject: [Bug translator/11504] Wrong location for inferred type conflict in error message
- References: <20100416105207.11504.mjw@redhat.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From chwang at redhat dot com 2010-04-16 19:36 -------
I was mistaken, size is not a global in nfs.stp. 'size' is a local parameter
taken from the probe point nfs.aop.readpages.{,return}.
I could fix this by giving tokens an exp_type attribute, or (hand-waving) some
sort of context-filtering to determine if two tokens are visible to each other.
Not all tokens can have a sensible exp_type.
On a side note, declaring size as global in nfs.stp gets rid of this problem.
Caveat: type mismatch with size as a global creates a longer error:
semantic error: probe_1978 with type mismatch (long vs. string): identifier
'size' at /usr/local/share/systemtap/tapset/nfs.stp:875:13
source: size = $return
^
semantic error: probe_1978 type first inferred here (string): identifier 'size'
at temp/11504.stp:2:22
source: printf("size=%s\n", size);
^
semantic error: probe_1980 with type mismatch (string vs. long): identifier
'nr_to_write' at /usr/local/share/systemtap/tapset/nfs.stp:1004:16
source: size = nr_to_write
^
semantic error: probe_1980 type first inferred here (long): identifier
'nr_to_write' at :996:9
source: nr_to_write = $wbc->nr_to_write
--
http://sourceware.org/bugzilla/show_bug.cgi?id=11504
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