[Bug debug/54774] New: insufficient debug info for strong typed enum

[Bug debug/54774] New: insufficient debug info for strong typed enum

[chihin.ko at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54774

             Bug #: 54774
           Summary: insufficient debug info for strong typed enum
    Classification: Unclassified
           Product: gcc
           Version: 4.6.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: chihin.ko@oracle.com


Created attachment 28320
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28320
compileable c++ test case and dwarf dump

For strong typed enum, there is no  type information:

#include <iostream>

enum UI: unsigned int
{
        None = 0,
        Single = 1,
        Multiple = 0xFFFF0000U
};

 <1><26aa>: Abbrev Number: 69 (DW_TAG_enumeration_type)
     DW_AT_name        : UI
     DW_AT_byte_size   : 4
     DW_AT_decl_file   : 1
     DW_AT_decl_line   : 3
     DW_AT_sibling     : <26cc>

  Should have a DW_AT_type : <unsigned int type> under DW_TAG_enumeration_type

[Bug debug/54774] insufficient debug info for strong typed enum

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54774

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |jason at gcc dot gnu.org

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-10-02 10:53:11 UTC ---
Guess we'd need to either move ENUM_FIXED_UNDERLYING_TYPE_P bit (and possibly
ENUM_UNDERLYING_TYPE convention) out of the FE to tree.h, or add a langhook
to query that info from the FE (won't work well with LTO though, but there are
tons of things that don't either).

[Bug debug/54774] insufficient debug info for strong typed enum

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54774

--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-23 14:49:24 UTC ---
*** Bug 55447 has been marked as a duplicate of this bug. ***

[Bug debug/54774] [4.4.4, 4.5, 4.6, 4.7] insufficient debug info for strong typed enum

[chihin.ko at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54774

chihin ko <chihin.ko at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|insufficient debug info for |[4.4.4, 4.5, 4.6, 4.7]
                   |strong typed enum           |insufficient debug info for
                   |                            |strong typed enum

--- Comment #3 from chihin ko <chihin.ko at oracle dot com> 2012-12-06 19:57:46 UTC ---
This problem can trace back from gcc 4.4.4.

[Bug debug/54774] insufficient debug info for strong typed enum

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54774

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.4.4, 4.5, 4.6, 4.7]      |insufficient debug info for
                   |insufficient debug info for |strong typed enum
                   |strong typed enum           |

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-06 20:38:45 UTC ---
But it isn't a regression, so Summary shouldn't be changed for that fact.  You
can fill in Known to work: (guess empty) and Known to fail:.

[Bug debug/54774] insufficient debug info for strong typed enum

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54774

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-12-07
     Ever Confirmed|0                           |1

--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-12-07 00:11:10 UTC ---
Confirming.

[Bug debug/54774] insufficient debug info for strong typed enum

[mark at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54774

Mark Wielaard <mark at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mark at gcc dot gnu.org

--- Comment #6 from Mark Wielaard <mark at gcc dot gnu.org> ---
I think this is a duplicate of PR debug/16063.

With the proposed patch for that applied the debuginfo for the UI enum looks
like:

 [  243e]    enumeration_type
             name                 (string) "UI"
             byte_size            (data1) 4
             type                 (ref4) [  2463]
             decl_file            (data1) 1
             decl_line            (data1) 3
             sibling              (ref4) [  2463]
 [  244d]      enumerator
               name                 (strp) "None"
               const_value          (data1) 0
 [  2453]      enumerator
               name                 (strp) "Single"
               const_value          (data1) 1
 [  2459]      enumerator
               name                 (strp) "Multiple"
               const_value          (data4) 4294901760
 [  2463]    base_type
             byte_size            (data1) 4
             encoding             (data1) unsigned (7)

[Bug debug/54774] insufficient debug info for strong typed enum

[tromey at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54774

Tom Tromey <tromey at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |tromey at gcc dot gnu.org
         Resolution|---                         |DUPLICATE

--- Comment #7 from Tom Tromey <tromey at gcc dot gnu.org> ---
(In reply to Mark Wielaard from comment #6)
> I think this is a duplicate of PR debug/16063.

I agree.

*** This bug has been marked as a duplicate of bug 16063 ***