[Bug debug/7081] DWARF enhancements for C++

[Bug debug/7081] DWARF enhancements for C++

[dhazeghi@yahoo.com]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7081



------- Additional Comments From dhazeghi@yahoo.com  2003-05-27 06:24 -------
Hello,

can you confirm what the current status of this report is? Particularly, are the proposed 
enhancements still missing from gcc 3.3 and/or gcc mainline? Thanks,

Dara



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[Bug debug/7081] DWARF enhancements for C++

[jcownie@etnus.com]

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------- Additional Comments From jcownie@etnus.com  2003-05-27 10:03 -------
Subject: Re:  DWARF enhancements for C++ 


> can you confirm what the current status of this report is?
> Particularly, are the proposed enhancements still missing from gcc 3.3
> and/or gcc mainline? Thanks,

GCC 3.3 still emits DW_TAG_structure_type when DW_TAG_class should be
used. I don't have a mainline gcc to check, but if you do it should be
trivial to do.

Daniel's comment suggests that the second issue (vtable information)
isn't going to get fixed. 

I think that's a pity, because replicating the class layout algorithm
in the debugger seems unnecessarily complex to me (after all, the same
argument would say that there's no need to output offsets for class
members since they can be generated from the ABI too). Having the same
piece of code in the debugger and the compiler leads to the
possibility of actually having a _slightly different_ piece of code in
each place with concomitant bugs, and means that when the ABI changes
(as it did between GCC 2.x and GCC 3.x) the change has to occur in
both places. (Yes, I know, it's _right_ now and isn't ever going to
change again :-)

Whatever, fixing the tag would be worthwhile even if you don't want to
emit information about the vtable pointer.

-- Jim 

James Cownie	<jcownie@etnus.com>
Etnus, LLC.     +44 117 9071438
http://www.etnus.com






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[Bug debug/7081] DWARF enhancements for C++

[pinskia@physics.uc.edu]

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pinskia@physics.uc.edu changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2003-05-27 15:04:35
               date|                            |


------- Additional Comments From pinskia@physics.uc.edu  2003-05-27 15:04 -------
It is in 3.3 but no one has checked the mainline yet.



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[Bug debug/7081] DWARF enhancements for C++

[drow@gcc.gnu.org]

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drow@gcc.gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2003-05-27 15:04:35         |2003-06-02 16:54:39
               date|                            |


------- Additional Comments From drow@gcc.gnu.org  2003-06-02 16:54 -------
Present in mainline also.

I'm now inclined to agree with the submitter that both should be fixed.



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[Bug debug/7081] DWARF enhancements for C++

[dberlin@gcc.gnu.org]

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------- Additional Comments From dberlin@gcc.gnu.org  2003-06-16 02:23 -------
While i'll fix the first, i don't have the info to fix the second, and until
their is a DWARF3 standard way of describing this, or an extension is proposed,
i plan on closing this bug as fixed, and let him file a second bug.  This should
have been two bugs anyway.

The questions that need to be answered include:
1. What exactly do you want in terms of info about the vtable pointer? The
location? The way to get at each element of the vtable? What?
2. This is not externally visible, or programmer created, info. It's completely
internal to the ABI.  It should *not* be described as a member variable or a
member function of the class.  Thus, it needs a new tag. Otherwise, we'd have to
fudge the name to be something like "vtable", which will cause people unfamiliar
with the internals of C++ to ask us where this "vtable" member is coming from in
their debugger.  In reality, it should be a DW_TAG_vtable or something, that is
a child of the class, and contains attributes like DW_AT_location telling you
the location of the vtable, and probably some child describing how to get each
element as a dwarf3 function.

[Bug debug/7081] DWARF enhancements for C++

[dberlin@gcc.gnu.org]

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dberlin@gcc.gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2003-06-02 16:54:39         |2003-06-16 02:42:39
               date|                            |

[Bug debug/7081] DWARF enhancements for C++

[wilson at gcc dot gnu dot org]

------- Additional Comments From wilson at gcc dot gnu dot org  2003-12-04 01:39 -------
There was a patch posted here:
    http://gcc.gnu.org/ml/gcc-patches/2003-06/msg01748.html
This was partly OKed, and then the thread died out while discussing how to best
implement the C++ FE part of the patch.  I'm just including this info here for
reference.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7081

[Bug debug/7081] DWARF enhancements for C++

[drow at gcc dot gnu dot org]

------- Comment #14 from drow at gcc dot gnu dot org  2008-12-22 13:46 -------
Part fixed, part refiled.


-- 

drow at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7081

[Bug debug/7081] DWARF enhancements for C++

[jan dot kratochvil at redhat dot com]

------- Comment #13 from jan dot kratochvil at redhat dot com  2008-12-21 19:33 -------
Please make this Bug CLOSED as the point 1 has been fixed by Alexandre Oliva
and the point 2 is already filed as PR debug/11208.


-- 

jan dot kratochvil at redhat dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jan dot kratochvil at redhat
                   |                            |dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7081

[Bug debug/7081] DWARF enhancements for C++

[aoliva at gcc dot gnu dot org]

------- Comment #12 from aoliva at gcc dot gnu dot org  2007-12-15 20:22 -------
1) is now fixed.  I wish I'd had time to get to 2), but my time slot for this
is over for the time being, so I'll leave this up for grabs.


-- 

aoliva at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|aoliva at gcc dot gnu dot   |unassigned at gcc dot gnu
                   |org                         |dot org
             Status|ASSIGNED                    |NEW


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7081

[Bug debug/7081] DWARF enhancements for C++

[aoliva at gcc dot gnu dot org]

------- Comment #11 from aoliva at gcc dot gnu dot org  2007-12-15 20:19 -------
Subject: Bug 7081

Author: aoliva
Date: Sat Dec 15 20:19:23 2007
New Revision: 130960

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=130960
Log:
gcc/ChangeLog:
PR debug/7081
* dwarf2out.c (dwarf_tag_name): Synchronize with dwarf2.h.
(is_type_die): Cover interface types.
(class_or_namespace_scope_p): Cover interface and class types.
(record_type_tag): New.
(gen_inlined_structure_type_die): Use it.
(gen_struct_or_union_type_die): Likewise.
(prune_unused_types_walk): Cover interface types.
* langhooks.h (classify_record): New enum.
(classify_record): New member in struct langhooks_for_types.
* langhooks-def.h (LANG_HOOKS_CLASSIFY_RECORD): New.
(LANGHOOKS_FOR_TYPES_INITIALIZER): Adjust.
gcc/cp/ChangeLog:
PR debug/7081
* cp-lang.c (cp_classify_record): New.
(LANG_HOOKS_CLASSIFY_RECORD): Override.
gcc/java/ChangeLog:
PR debug/7081
* lang.c (java_classify_record): New.
(LANG_HOOKS_CLASSIFY_RECORD): Override.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/cp-lang.c
    trunk/gcc/dwarf2out.c
    trunk/gcc/java/ChangeLog
    trunk/gcc/java/lang.c
    trunk/gcc/langhooks-def.h
    trunk/gcc/langhooks.h


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7081

[Bug debug/7081] DWARF enhancements for C++

[aoliva at gcc dot gnu dot org]

------- Comment #10 from aoliva at gcc dot gnu dot org  2007-11-29 06:00 -------
Mine


-- 

aoliva at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |aoliva at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7081

[Bug debug/7081] DWARF enhancements for C++

[dberlin at gcc dot gnu dot org]

------- Comment #9 from dberlin at gcc dot gnu dot org  2005-10-02 01:15 -------
I won't get back to this for a while


-- 

dberlin at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|dberlin at gcc dot gnu dot  |unassigned at gcc dot gnu
                   |org                         |dot org
             Status|ASSIGNED                    |NEW
  GCC build triplet|i686-pc-linux-gnu           |
   GCC host triplet|i686-pc-linux-gnu           |
 GCC target triplet|i686-pc-linux-gnu           |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7081