[Bug fortran/11104] New: gdb 7.0 does not print two dimensional Fortran arrays correctly.

[Bug fortran/11104] New: gdb 7.0 does not print two dimensional Fortran arrays correctly.

[at_gdb at mathalacarte dot com]

I was not able to find how to find the triplets requested when running on a
Gentoo Linux system.  Running uname -a gives
Linux mon 2.6.32-gentoo #1 SMP Thu Dec 3 13:59:59 PST 2009 x86_64 AMD
Opteron(tm) Processor 242 AuthenticAMD GNU/Linux

Try this Fortran code
====
      program test
c   Testing gdb for printing arrays
      double precision C(4,4)
      do J = 1, 4
        do I = 1, 4
          C(I,J) = dble(I+J)
        end do
      end do
      print '(''C(1,1), C(4,4):'', 1P, 2E12.5)', C(1,1), C(4,4)
      stop
      end
======
gfortran -ggdb -o test test.f
gdb test
b 9
r
p c(1,2)

And I get

no such vector element

-- 
           Summary: gdb 7.0 does not print two dimensional Fortran arrays
                    correctly.
           Product: gdb
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: fortran
        AssignedTo: unassigned at sourceware dot org
        ReportedBy: at_gdb at mathalacarte dot com
                CC: gdb-prs at sourceware dot org


http://sourceware.org/bugzilla/show_bug.cgi?id=11104

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[Bug fortran/11104] gdb 7.0 does not print two dimensional Fortran arrays correctly.

[at_gdb at mathalacarte dot com]

------- Additional Comments From at_gdb at mathalacarte dot com  2010-01-26 16:09 -------
Just tried gdb-7.0.1 on my gentoo system, and it has the same problem, this time 
noticed for a one-dimensional array.  The error message is the same.  Version 6.8 
works.

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[Bug fortran/11104] gdb 7.0 does not print two dimensional Fortran arrays correctly.

[fenixk19 at mail dot ru]

------- Additional Comments From fenixk19 at mail dot ru  2010-05-31 09:49 -------
Confirming on version 7.1

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
            Version|7.0                         |7.1


http://sourceware.org/bugzilla/show_bug.cgi?id=11104

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[Bug fortran/11104] gdb 7.0 does not print two dimensional Fortran arrays correctly.

[aburgess at broadcom dot com]

------- Additional Comments From aburgess at broadcom dot com  2010-09-12 14:43 -------
Created an attachment (id=4976)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4976&action=view)
Proposed patch

Fortran multi-dimensional arrays are of type:
   ARRAY of ( ARRAY of ( BASETYPE ) )
Nested to the required depth.
The code used to fetch a single element out of an array could previously only
handle (ARRAY of BASETYPE), and so before calling this we would modify the type
of the array. However, this was leading to other problems when we try to bounds
check the array access.

This patch changes the array access code so that is can peel off all the layers
of ARRAY of ARRAY of ... to get to the BASETYPE.


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[Bug fortran/11104] gdb 7.0 does not print two dimensional Fortran arrays correctly.

[aburgess at broadcom dot com]

------- Additional Comments From aburgess at broadcom dot com  2010-09-12 14:53 -------
Created an attachment (id=4977)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4977&action=view)
Test for this issue.

The multi-dim.tar.bz2 contains a new test that should cover this issue. It
would need adding to gdb/testsuite/gdb.fortran. The only thing is, I've not
been able to run any of the Fortran tests myself as I'm struggling to get them
to compile, I don't know if this is just my setup or a general issue.
I'm working with gdb-7.2 & gcc 4.4.3.

I've checked that this new test works using a dirty hack :) but someone who can
actually get the Fortran tests running should check this works correctly before
it's committed into the tree.

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[Bug fortran/11104] gdb 7.0 does not print two dimensional Fortran arrays correctly.

[aburgess at broadcom dot com]

------- Additional Comments From aburgess at broadcom dot com  2010-09-16 08:03 -------
Created an attachment (id=4986)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4986&action=view)
Updated patch

This should apply to the current CVS head.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
Attachment #4976 is|0                           |1
           obsolete|                            |


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[Bug fortran/11104] gdb 7.0 does not print two dimensional Fortran arrays correctly.

[aburgess at broadcom dot com]

------- Additional Comments From aburgess at broadcom dot com  2010-09-16 08:45 -------
Created an attachment (id=4987)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4987&action=view)
Updated testcase

Finally got the Fortran tests running, slight update to the test case.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
Attachment #4977 is|0                           |1
           obsolete|                            |


http://sourceware.org/bugzilla/show_bug.cgi?id=11104

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[Bug fortran/11104] gdb 7.0 does not print two dimensional Fortran arrays correctly.

[aburgess at broadcom dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=11104

Andrew Burgess <aburgess at broadcom dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #4986|0                           |1
        is obsolete|                            |

--- Comment #7 from Andrew Burgess <aburgess at broadcom dot com> 2010-10-19 08:30:41 UTC ---
Created attachment 5068
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5068
Support for multi-dimensional fortran arrays

Minor updates to patch to meeting coding standards. Changelog message removed
from patch file:

2010-10-19 Andrew Burgess <aburgess@broadcom.com>

      * valarith.c (value_subscripted_rvalue) Walk through
      multi-dimensional arrays to find the element type for the
      array. Allows the upper bound check to work with multi-dimensional
      arrays. Fix PR gdb/11104.
      * eval.c (evaluate_subexp_standard) Remove hack from
      multi_f77_subscript case now that multi-dimensional arrays are
      supported.  Fix PR gdb/11104.

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[Bug fortran/11104] gdb 7.0 does not print two dimensional Fortran arrays correctly.

[aburgess at broadcom dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=11104

Andrew Burgess <aburgess at broadcom dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #4987|0                           |1
        is obsolete|                            |

--- Comment #8 from Andrew Burgess <aburgess at broadcom dot com> 2010-10-19 15:10:24 UTC ---
Created attachment 5069
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5069
New test in patch format

Test for this issue in patch format. ChangeLog message included before patch.

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[Bug fortran/11104] gdb 7.0 does not print two dimensional Fortran arrays correctly.

[aburgess at broadcom dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=11104

Andrew Burgess <aburgess at broadcom dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #5068|0                           |1
        is obsolete|                            |

--- Comment #9 from Andrew Burgess <aburgess at broadcom dot com> 2010-10-19 15:12:08 UTC ---
Created attachment 5070
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5070
Support for multi-dimensional fortran arrays

Updated to include the ChangeLog entry as text before the patch content.

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[Bug fortran/11104] gdb 7.0 does not print two dimensional Fortran arrays correctly.

[cvs-commit at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=11104

--- Comment #10 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> 2011-01-12 16:16:33 UTC ---
CVSROOT:    /cvs/src
Module name:    src
Changes by:    jkratoch@sourceware.org    2011-01-12 16:16:25

Modified files:
    gdb            : ChangeLog dwarf2read.c eval.c 
    gdb/testsuite  : ChangeLog 
Added files:
    gdb/testsuite/gdb.fortran: multi-dim.exp multi-dim.f90 

Log message:
    gdb/
    PR fortran/11104 and DWARF unbound arrays detection.
    * dwarf2read.c (read_subrange_type): Set zero length on unspecified
    upper bound.  Set TYPE_HIGH_BOUND_UNDEFINED if not language_ada on
    unspecified upper bound.
    * eval.c (evaluate_subexp_standard) <multi_f77_subscript>: Remove
    variables array_size_array, tmp_type and offset_item.  New variable
    array.  Remove call to f77_get_upperbound.  New variables array_type
    and index.  Call value_subscripted_rvalue for each dimenasion.  Remove
    the final call to deprecated_set_value_type.

    gdb/testsuite/
    PR fortran/11104 and DWARF unbound arrays detection.
    * gdb.fortran/multi-dim.exp: New file.
    * gdb.fortran/multi-dim.f90: New file.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/ChangeLog.diff?cvsroot=src&r1=1.12463&r2=1.12464
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/dwarf2read.c.diff?cvsroot=src&r1=1.494&r2=1.495
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/eval.c.diff?cvsroot=src&r1=1.145&r2=1.146
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/testsuite/ChangeLog.diff?cvsroot=src&r1=1.2549&r2=1.2550
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/testsuite/gdb.fortran/multi-dim.exp.diff?cvsroot=src&r1=NONE&r2=1.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/testsuite/gdb.fortran/multi-dim.f90.diff?cvsroot=src&r1=NONE&r2=1.1

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[Bug fortran/11104] gdb 7.0 does not print two dimensional Fortran arrays correctly.

[jan.kratochvil at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=11104

Jan Kratochvil <jan.kratochvil at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |jan.kratochvil at redhat
                   |                            |dot com
         Resolution|                            |FIXED

--- Comment #11 from Jan Kratochvil <jan.kratochvil at redhat dot com> 2011-01-12 16:22:02 UTC ---
Fixed by the commit based on Andrew Burgess's patch.

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[Bug fortran/11104] gdb 7.0 does not print two dimensional Fortran arrays correctly.

[smirta at mail dot ru]

http://sourceware.org/bugzilla/show_bug.cgi?id=11104

Saha Smirnovsky <smirta at mail dot ru> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
                 CC|                            |smirta at mail dot ru
            Version|7.1                         |HEAD
         Resolution|FIXED                       |
   Target Milestone|7.1                         |7.3

--- Comment #12 from Saha Smirnovsky <smirta at mail dot ru> 2011-04-05 14:42:59 UTC ---
gdb gives wrong results in case when one-dimensional array is passed as
argument to subroutine and is treated as multidimensional array with dimensions
which were passed as arguments.

Please see this Fortran code:

test.f90
===
  program test_array
  integer foo(4)

  do I=1,4
    foo(I)=I
  enddo
  call test(foo,2)
  end


  subroutine test(M,N)
  integer  N
  integer  M(N,N)

  do J=1,N
  do I=1,N
    write(*,*) "I,J,M = ",I,J,M(I,J)
  enddo
  enddo
  end
===

This is output:

$ gfortran -ggdb -o test test.f90
$ ./test
 I,J,M =            1           1           1
 I,J,M =            2           1           2
 I,J,M =            1           2           3
 I,J,M =            2           2           4

This is debugging:
$ gdb test
...
(gdb) break test
Breakpoint 1 at 0x804863e: file test.f90, line 11.
(gdb) run
Starting program: /home/????/test 

Breakpoint 1, test (m=..., n=2) at test.f90:11
11    subroutine test(M,N)
(gdb) print M(2,2)
$1 = 2

I use gdb 7.3.50.20110405

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[Bug fortran/11104] gdb 7.0 does not print two dimensional Fortran arrays correctly.

[smirta at mail dot ru]

http://sourceware.org/bugzilla/show_bug.cgi?id=11104

--- Comment #13 from Saha Smirnovsky <smirta at mail dot ru> 2011-04-21 11:25:08 UTC ---
This bug is temporary fixed in archer-jankratochvil-vla branch

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