[Bug tapsets/16730] New: stap -L '**' displays non-public probe points

["aferrazz at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16730

            Bug ID: 16730
           Summary: stap -L '**' displays non-public probe points
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: tapsets
          Assignee: systemtap at sourceware dot org
          Reporter: aferrazz at redhat dot com

Running stap -L '**' currently shows probe points that are not user-accessible.
For example, one of the probes it outputs is begin(-1001), appearing as the
following:

begin(-1001) num:long

A pass 1 run of stap shows that this probe point is defined in
/usr/share/systemtap/tapset/linux/socket.stp, but is only used locally to that
script rather than being an alias definition. Also, the variable "num" is not
accessible to user scripts from within a begin(-1001) probe.

At the moment, begin(-1001) is only confirmed example of a non-public probe
point being listed, but it is possible that this problem extends beyond just
that case.

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