[Bug documentation/14313] New: rewrite alias example in langref.tex

[smakarov at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=14313

             Bug #: 14313
           Summary: rewrite alias example in langref.tex
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: minor
          Priority: P2
         Component: documentation
        AssignedTo: systemtap@sourceware.org
        ReportedBy: smakarov@redhat.com
    Classification: Unclassified


The current explanation of probe aliases in langref uses an example where we
duplicate the definition of the syscall.read alias. This has the potential to
get confusing once we get into discussion of alias suffixes using the same
example -- specifically, the tapsets also define syscall.read.return as an
alias, but the language guide doesn't mention that. Hence it is currently
possible for the first-time reader to wind up incorrectly assuming that, in
actual code using the probe point syscall.read.return, return would be passed
through as an alias suffix.

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