[Bug c++/39285] New: Missing debug info for enum members in C++

[Bug c++/39285] New: Missing debug info for enum members in C++

[ppluzhnikov at google dot com]

GCC @144404 does not generate DW_AT_const_value for enum members in C++ mode
(in C everything appears fine). This is a regression from 4.3.1.

Test case:

enum E { red = 1, green = 42 };

int main()
{
   E e = red;
   return e;
}

When above is compiled with gcc-4.3.1, readelf -w shows:
 <2><2f>: Abbrev Number: 3 (DW_TAG_enumerator)
  <30>     DW_AT_name        : red      
  <34>     DW_AT_const_value : 1        
 <2><35>: Abbrev Number: 4 (DW_TAG_enumerator)
  <36>     DW_AT_name        : (indirect string, offset: 0x8): green    
  <3a>     DW_AT_const_value : 42       
 <1><3c>: Abbrev Number: 5 (DW_TAG_subprogram)
...
When compiled with gcc-4.4.0:
 <2><2f>: Abbrev Number: 3 (DW_TAG_enumerator)
  <30>     DW_AT_name        : red      
 <2><34>: Abbrev Number: 4 (DW_TAG_enumerator)
  <35>     DW_AT_name        : (indirect string, offset: 0x8): green    
 <1><3a>: Abbrev Number: 5 (DW_TAG_subprogram)
...

AFAICT, this is causing the following GDB tests to fail:

FAIL: gdb.cp/classes.exp: print obj_with_enum (2)
FAIL: gdb.cp/classes.exp: print obj_with_enum.priv_enum
FAIL: gdb.cp/classes.exp: ptype obj_with_enum.priv_enum
FAIL: gdb.cp/classes.exp: print ('ClassWithEnum::PrivEnum') 42

FAIL: gdb.cp/m-data.exp: simple object, enum
FAIL: gdb.cp/m-data.exp: derived template object, derived enum
FAIL: gdb.cp/m-data.exp: template object, derived enum
FAIL: gdb.cp/m-static.exp: derived template object, static enum
FAIL: gdb.cp/m-static.exp: template object, static derived enum


-- 
           Summary: Missing debug info for enum members in C++
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ppluzhnikov at google dot com
 GCC build triplet: i686-host_pc-linux-gnu
  GCC host triplet: i686-host_pc-linux-gnu
GCC target triplet: i686-host_pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39285

[Bug c++/39285] [4.4 Regression] Missing debug info for enum members in C++

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-debug
            Summary|Missing debug info for enum |[4.4 Regression] Missing
                   |members in C++              |debug info for enum members
                   |                            |in C++
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39285

[Bug c++/39285] [4.4 Regression] Missing debug info for enum members in C++

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2009-02-24 13:27 -------
This is because as we come here (gen_enumeration_type_die):

      for (link = TYPE_VALUES (type);
           link != NULL; link = TREE_CHAIN (link))
        {
          dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die, link);
          tree value = TREE_VALUE (link);

          add_name_attribute (enum_die,
                              IDENTIFIER_POINTER (TREE_PURPOSE (link)));

          if (host_integerp (value, TYPE_UNSIGNED (TREE_TYPE (value))))

value is a CONST_DECL, not an integer constant.  Whereas for GCC 4.3 we
had INTEGER_CSTs there.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-02-24 13:27:44
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39285

[Bug c++/39285] [4.4 Regression] Missing debug info for enum members in C++

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2009-02-24 13:29 -------
I have a patch.  This was noticed and fixed for SDB previously.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rguenth at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2009-02-24 13:27:44         |2009-02-24 13:29:48
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39285

[Bug debug/39285] [4.4 Regression] Missing debug info for enum members in C++

[rguenth at gcc dot gnu dot org]

------- Comment #4 from rguenth at gcc dot gnu dot org  2009-02-24 14:47 -------
Fixed.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
      Known to work|                            |4.3.3
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39285

[Bug debug/39285] [4.4 Regression] Missing debug info for enum members in C++

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2009-02-24 14:47 -------
Subject: Bug 39285

Author: rguenth
Date: Tue Feb 24 14:47:30 2009
New Revision: 144407

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=144407
Log:
2009-02-24  Richard Guenther  <rguenther@suse.de>

        PR debug/39285
        * dwarf2out.c (gen_enumeration_type_die): Handle CONST_DECLs.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dwarf2out.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39285