[Bug translator/13371] New: parser doubles-up incoming \ characters in string literals

[fche at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13371

             Bug #: 13371
           Summary: parser doubles-up incoming \ characters in string
                    literals
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
        AssignedTo: systemtap@sourceware.org
        ReportedBy: fche@redhat.com
    Classification: Unclassified


During early parse, string literals containing \ characters are 
doubled, so that later at translate time, the C compiler will turn them
back into normal \'s.  Since we sometimes process the contents of these
strings within the translator, we need the literals to be unmolested with
this sort of doubling, and instead do that only at code-emission time.

% touch 'foo*bar'
% stap -v -p2 -e 'probe process("foo\\*bar").function("main") {}'
[...]
semantic error: glob foo\\*bar error (3) while resolving probe point
process("foo\\*bar").function("main")

It should have successfully matched the 'foo*bar' program without globbing.
(The \\ on the stap command line was for escaping the shell's parser. 
With only a single \, the shell passes * to systemtap.)

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