[Bug translator/11858] New: Confusing error message with get_kretprobe_long

[mjw at redhat dot com]

The following is a bit of a weird way to tell me $filename is a pointer to a string:

$ stap -e 'probe syscall.open.return { log("opened: " . $filename); }'
semantic error: type mismatch (long vs. string): identifier
'_get_kretprobe_long' at
/usr/local/install/systemtap/share/systemtap/tapset/kretprobe.stp:30:10
        source: function _get_kretprobe_long:long(i:long) %{ /* pure */
                         ^
Pass 2: analysis failed.  Try again with another '--vp 01' option.

Obviously I should have used user_string($filename) here. It is harder to spot
what the real error is in a larger return probe handler which has multiple
string contexts.

-- 
           Summary: Confusing error message with get_kretprobe_long
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: mjw at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=11858

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