[Bug fortran/17905] New: allocated arrays not visible with gdb

[Bug fortran/17905] New: allocated arrays not visible with gdb

[bdavis at gcc dot gnu dot org]

see the example below along with gdb error.


$ cat g.f90
      program test
      integer,dimension(:),allocatable :: array
      allocate (array(10))
      array(10000000)=8
      end
$ gfc g.f90
$ gdb a.out
GNU gdb 6.2.1
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu"...Using host libthread_db library
"/lib/tls/libthread_db.so.1".
 (gdb) break g.f90:3
Breakpoint 1 at 0x80481f8: file g.f90, line 3.
(gdb) run
Starting program: /home/bdavis/a.out
 
Breakpoint 1, MAIN__ () at g.f90:3
3             allocate (array(10))
Current language:  auto; currently fortran
(gdb) whatis array
type = Invalid type code (3) in symbol table.


more info :

http://gcc.gnu.org/ml/fortran/2004-10/msg00069.html

-- 
           Summary: allocated arrays not visible with gdb
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bdavis at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17905

[Bug fortran/17905] allocated arrays not visible with gdb

[tobi at gcc dot gnu dot org]

------- Additional Comments From tobi at gcc dot gnu dot org  2004-10-09 14:00 -------
Confirmed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2004-10-09 14:00:39
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17905

[Bug fortran/17905] allocated arrays not visible with gdb

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-10-09 16:32 -------
I saw something like this too.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-debug


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17905

[Bug fortran/17905] allocated arrays not visible with gdb

[woodzltc at sources dot redhat dot com]

------- Additional Comments From woodzltc at sources dot redhat dot com  2005-06-30 08:48 -------
For array, ifc will output the following debuginfo:

 <2><7e>: Abbrev Number: 4 (DW_TAG_variable)   ====>  TAG for variable "array"
     DW_AT_decl_line   : 2
     DW_AT_decl_column : 42
     DW_AT_decl_file   : 1
     DW_AT_accessibility: 1     (public)
     DW_AT_name        : array
     DW_AT_type        : <99>    ====> next TAG, indicating that it is an array
     DW_AT_location    : 5 byte block: 3 50 23 9 8      (DW_OP_addr: 8092350)
     DW_AT_external    : 0
     DW_AT_start_scope : 26

 <1><99>: Abbrev Number: 5 (DW_TAG_array_type)
     DW_AT_ordering    : 1      (column major)
     DW_AT_type        : <cb>
     DW_AT_data_location: 2 byte block: 97 6    (DW_OP_push_object_address;
DW_OP_deref)
     DW_AT_allocated   : 11 byte block: 97 10 c 22 6 c 1 0 0 0 1a      
(DW_OP_push_object_address; DW_OP_constu: 12; DW_OP_plus; DW_OP_deref;
DW_OP_const4u: 1; DW_OP_and)

If gfortran could output similar debuginfo, gdb could handle it correctly. 

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |woodzltc at sources dot
                   |                            |redhat dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17905

[Bug fortran/17905] allocated arrays not visible with gdb

[burnus at gcc dot gnu dot org]

------- Comment #8 from burnus at gcc dot gnu dot org  2007-12-09 22:48 -------
I believe this has been fixed by the patch (PR 22244):
  http://gcc.gnu.org/ml/gcc-cvs/2007-12/msg00175.html

Note for gdb you still need the patches from:
  http://sourceware.org/ml/gdb-patches/2007-11/msg00438.html

Result with current gfortran and Intel's idb 10.1:

(idb) b test.f90:3
Breakpoint 1 at 0x4008fe: file test.f90, line 3.
(idb) run
INTERNAL ERROR: unexpected address for .text of /dev/shm/a.out
Expected = 0x0000000000600000, actual = 0x0000000000400000, diff =
0xffffffffffe00000
Starting program: /dev/shm/a.out

Breakpoint 1, test () at test.f90:3
3             allocate (array(10))
(idb) next
4             array = 3
(idb) next
5             array(1) = 4
(idb) ptype array
type = INTEGER(4)(10)
(idb) p array
$1 = {3, 3, 3, 3, 3, 3, 3, 3, 3, 3}


-- 

burnus at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17905

[Bug fortran/17905] allocated arrays not visible with gdb

[burnus at gcc dot gnu dot org]

------- Comment #7 from burnus at gcc dot gnu dot org  2007-11-27 09:55 -------
I think this is fixed by the patch for PR 22244.
Patches:
  http://gcc.gnu.org/ml/gcc-patches/2007-11/msg00888.html
  http://gcc.gnu.org/ml/gcc-patches/2007-11/msg00903.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17905

[Bug fortran/17905] allocated arrays not visible with gdb

[pinskia at gcc dot gnu dot org]

------- Comment #6 from pinskia at gcc dot gnu dot org  2005-10-28 12:04 -------
(In reply to comment #5)
> "set lang c" didn't give me that output.  What is your configuration, gdb ,
> gfortran version and so on?  
Oh, I did a "p array" since whatis is the same as ptype.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17905

[Bug fortran/17905] allocated arrays not visible with gdb

[woodzltc at sources dot redhat dot com]

------- Comment #5 from woodzltc at sources dot redhat dot com  2005-10-28 04:42 -------
"set lang c" didn't give me that output.  What is your configuration, gdb ,
gfortran version and so on?  

My gdb session is like this:
(gdb) whatis array
type = Invalid type code (3) in symbol table.
(gdb) set language c
Warning: the current language does not match this frame.
(gdb) whatis array
type = struct array1_int4
(gdb)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17905

[Bug fortran/17905] allocated arrays not visible with gdb

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2005-10-27 23:27 -------
This is more of a gdb bug as if I do:
set lang c
it prints out the array as a descriptor:
$2 = {data = 0x9a7f2d8, offset = -1, dtype = 265, dim = {{stride = 1, lbound =
1, ubound = 10}}}


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17905