[Bug c++/15398] New: Incorrect "cannot resolve function" error when argument is a pointer to fixed size array

[Bug c++/15398] New: Incorrect "cannot resolve function" error when argument is a pointer to fixed size array

[saurabh at hotmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15398

             Bug #: 15398
           Summary: Incorrect "cannot resolve function" error when
                    argument is a pointer to fixed size array
           Product: gdb
           Version: 7.5
            Status: NEW
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned@sourceware.org
        ReportedBy: saurabh@hotmail.com
    Classification: Unclassified


Created attachment 6999
  --> http://sourceware.org/bugzilla/attachment.cgi?id=6999
C++ file to reproduce, see bug description

See the steps to reproduce below.
The "call" command should work (and does with gdb 7.2), because the arguments
and function signature match exactly.

> g++ -g fix_ptr.cc 
> gdb a.out
GNU gdb (GDB) 7.5
[... snip ...]
(gdb) b 14
Breakpoint 1 at 0x40063a: file fix_ptr.cc, line 14.
(gdb) run
[... snip ...]
Breakpoint 1, main () at fix_ptr.cc:14
14        return 0;
(gdb) call fn(3, x)
Cannot resolve function fn to any overloaded instance
(gdb) quit

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[Bug c++/15398] Incorrect "cannot resolve function" error when argument is a pointer to fixed size array

[saurabh at hotmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15398

saurabh at hotmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |saurabh at hotmail dot com

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[Bug c++/15398] Incorrect "cannot resolve function" error when argument is a pointer to fixed size array

[saurabh at hotmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15398

saurabh at hotmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|saurabh at hotmail dot com  |

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[Bug c++/15398] Incorrect "cannot resolve function" error when argument is a pointer to fixed size array (regression: worked with 7.2)

[saurabh at hotmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=15398

--- Comment #4 from saurabh at hotmail dot com ---
This bug is not fixed even in the latest release of gdb (13.2). I keep having
to use an old version with the supplied patch.

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[Bug c++/15398] Incorrect "cannot resolve function" error when argument is a pointer to fixed size array (regression: worked with 7.2)

[ssbssa at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=15398

Hannes Domani <ssbssa at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ssbssa at sourceware dot org

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[Bug c++/15398] Incorrect "cannot resolve function" error when argument is a pointer to fixed size array (regression: worked with 7.2)

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=15398

--- Comment #5 from Sourceware Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Hannes Domani <ssbssa@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=105470cd79f6d8c62b9156ce45e992895b01b13b

commit 105470cd79f6d8c62b9156ce45e992895b01b13b
Author: Hannes Domani <ssbssa@yahoo.de>
Date:   Mon Dec 25 19:05:55 2023 +0100

    Fix comparison of array types

    Currently it's not possible to call functions if an argument is a
    pointer to an array:
    ```
    (gdb) l f
    1       int f (int (*x)[2])
    2       {
    3         return x[0][1];
    4       }
    5
    6       int main()
    7       {
    8         int a[2][2] = {{0, 1}, {2, 3}};
    9         return f (a);
    10      }
    (gdb) p f(a)
    Cannot resolve function f to any overloaded instance
    ```

    This happens because types_equal doesn't handle array types, so the
    function is never even considered as a possibility.

    With array type handling added, by comparing element types and array
    bounds, the same works:
    ```
    (gdb) p f(a)
    $1 = 1
    ```

    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=15398
    Co-Authored-By: Keith Seitz <keiths@redhat.com>
    Reviewed-By: Guinevere Larsen <blarsen@redhat.com>
    Approved-By: Tom Tromey <tom@tromey.com>

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[Bug c++/15398] Incorrect "cannot resolve function" error when argument is a pointer to fixed size array (regression: worked with 7.2)

[ssbssa at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=15398

Hannes Domani <ssbssa at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |15.1
         Resolution|---                         |FIXED
             Status|ASSIGNED                    |RESOLVED

--- Comment #6 from Hannes Domani <ssbssa at sourceware dot org> ---
Fixed.

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