[Bug exp/15109] New: file::object syntax doesn't work if current language is c++

[Bug exp/15109] New: file::object syntax doesn't work if current language is c++

[dje at google dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15109

             Bug #: 15109
           Summary: file::object syntax doesn't work if current language
                    is c++
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: exp
        AssignedTo: unassigned@sourceware.org
        ReportedBy: dje@google.com
    Classification: Unclassified


gdb is supposed to support things like
p 'file.c'::local_variable
There's even a testcase for it: gdb.base/scope.exp.

But this feature is broken when the current language is c++.

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[Bug exp/15109] file::object syntax doesn't work if current language is c++

[dje at google dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15109

--- Comment #1 from dje at google dot com 2013-02-07 00:18:32 UTC ---
Repro:

foo.cc:
int foo;
int main () { return 0; }

bash$ g++ -g foo.cc
bash$ gdb a.out
(gdb) start
(gdb) disas 'foo.cc'::main
[... disassembly output ...]
(gdb) p 'foo.cc'::foo
A syntax error in expression, near `'.
(gdb) set lang c
Warning: the current language does not match this frame.
(gdb) p 'foo.cc'::foo
$1 = 0
(gdb)

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[Bug exp/15109] file::object syntax doesn't work if current language is c++

[tromey at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15109

Tom Tromey <tromey at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at redhat dot com
         AssignedTo|unassigned at sourceware    |tromey at redhat dot com
                   |dot org                     |

--- Comment #2 from Tom Tromey <tromey at redhat dot com> 2013-02-12 19:18:58 UTC ---
The bug is that the 2-level name lexer has a bug in
this case, causing it not to return the "::" token.
Then the parse fails.

I have a localized patch to fix it but I am considering
whether rewriting this code in a cleaner way would
now be preferable.

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[Bug exp/15109] file::object syntax doesn't work if current language is c++

[cvs-commit at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=15109

--- Comment #3 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> 2013-03-21 15:19:34 UTC ---
CVSROOT:    /cvs/src
Module name:    src
Changes by:    tromey@sourceware.org    2013-03-21 15:19:33

Modified files:
    gdb            : ChangeLog c-exp.y 
    gdb/testsuite  : ChangeLog 
    gdb/testsuite/gdb.cp: cpexprs.exp misc.exp 

Log message:
    PR exp/15109:
    * c-exp.y (yylex): Rewrite to push all tokens onto the FIFO.
    Handle FILENAME token.
    gdb/testsuite
    * gdb.cp/cpexprs.exp: Add test for FILENAME:: case.
    * gdb.cp/misc.exp: Add test for FILENAME:: case.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/ChangeLog.diff?cvsroot=src&r1=1.15294&r2=1.15295
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/c-exp.y.diff?cvsroot=src&r1=1.114&r2=1.115
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/testsuite/ChangeLog.diff?cvsroot=src&r1=1.3591&r2=1.3592
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/testsuite/gdb.cp/cpexprs.exp.diff?cvsroot=src&r1=1.12&r2=1.13
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/testsuite/gdb.cp/misc.exp.diff?cvsroot=src&r1=1.16&r2=1.17

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[Bug exp/15109] file::object syntax doesn't work if current language is c++

[tromey at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15109

Tom Tromey <tromey at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |7.7

--- Comment #4 from Tom Tromey <tromey at redhat dot com> 2013-03-21 15:20:28 UTC ---
Fixed.

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