Warning: something weird with void* types.

Warning: something weird with void* types.

[Fernando Nasser]

FYI, we are having to make a change in Insight to cope with a funny
thing that recently appeared in GDB.

The target type of a void* does not have the type name set to "void" any
longer.

(gdb) p *type
$3 = {code = TYPE_CODE_PTR, name = 0x0, tag_name = 0x0, length = 4, 
  upper_bound_type = 0, lower_bound_type = 0, objfile = 0x854e998, 
  target_type = 0x8bcd5d8, pointer_type = 0x0, reference_type = 0x0, 
  cv_type = 0x8bcd61c, flags = 1, nfields = 0, fields = 0x0, 
  vptr_basetype = 0x0, vptr_fieldno = -1, type_specific = {arg_types =
0x0, 
    cplus_stuff = 0x0}}
(gdb) p *target
$4 = {code = TYPE_CODE_VOID, name = 0x0, tag_name = 0x0, length = 1, 
  upper_bound_type = 0, lower_bound_type = 0, objfile = 0x854e998, 
  target_type = 0x0, pointer_type = 0x8bcd61c, reference_type = 0x0, 
  cv_type = 0x8bcd5d8, flags = 0, nfields = 0, fields = 0x0, 
  vptr_basetype = 0x0, vptr_fieldno = -1, type_specific = {arg_types =
0x0, 
    cplus_stuff = 0x0}}

As you see, TYPE_CODE_VOID does not have a name anymore, at least when
it is the target of a (void *) type..



-- 
Fernando Nasser
Red Hat Canada Ltd.                     E-Mail:  fnasser@redhat.com
2323 Yonge Street, Suite #300
Toronto, Ontario   M4P 2C9

Re: Warning: something weird with void* types.

[Fernando Nasser]

I can't believe nobody has anything to say about this...


Fernando Nasser wrote:
> 
> FYI, we are having to make a change in Insight to cope with a funny
> thing that recently appeared in GDB.
> 
> The target type of a void* does not have the type name set to "void" any
> longer.
> 
> (gdb) p *type
> $3 = {code = TYPE_CODE_PTR, name = 0x0, tag_name = 0x0, length = 4,
>   upper_bound_type = 0, lower_bound_type = 0, objfile = 0x854e998,
>   target_type = 0x8bcd5d8, pointer_type = 0x0, reference_type = 0x0,
>   cv_type = 0x8bcd61c, flags = 1, nfields = 0, fields = 0x0,
>   vptr_basetype = 0x0, vptr_fieldno = -1, type_specific = {arg_types =
> 0x0,
>     cplus_stuff = 0x0}}
> (gdb) p *target
> $4 = {code = TYPE_CODE_VOID, name = 0x0, tag_name = 0x0, length = 1,
>   upper_bound_type = 0, lower_bound_type = 0, objfile = 0x854e998,
>   target_type = 0x0, pointer_type = 0x8bcd61c, reference_type = 0x0,
>   cv_type = 0x8bcd5d8, flags = 0, nfields = 0, fields = 0x0,
>   vptr_basetype = 0x0, vptr_fieldno = -1, type_specific = {arg_types =
> 0x0,
>     cplus_stuff = 0x0}}
> 
> As you see, TYPE_CODE_VOID does not have a name anymore, at least when
> it is the target of a (void *) type..
> 


-- 
Fernando Nasser
Red Hat Canada Ltd.                     E-Mail:  fnasser@redhat.com
2323 Yonge Street, Suite #300
Toronto, Ontario   M4P 2C9

Re: Warning: something weird with void* types.

[Elena Zannoni]

Fernando Nasser writes:
 > I can't believe nobody has anything to say about this...

Can you file a PR? So we don't forget about this.

Elena

 > 
 > 
 > Fernando Nasser wrote:
 > > 
 > > FYI, we are having to make a change in Insight to cope with a funny
 > > thing that recently appeared in GDB.
 > > 
 > > The target type of a void* does not have the type name set to "void" any
 > > longer.
 > > 
 > > (gdb) p *type
 > > $3 = {code = TYPE_CODE_PTR, name = 0x0, tag_name = 0x0, length = 4,
 > >   upper_bound_type = 0, lower_bound_type = 0, objfile = 0x854e998,
 > >   target_type = 0x8bcd5d8, pointer_type = 0x0, reference_type = 0x0,
 > >   cv_type = 0x8bcd61c, flags = 1, nfields = 0, fields = 0x0,
 > >   vptr_basetype = 0x0, vptr_fieldno = -1, type_specific = {arg_types =
 > > 0x0,
 > >     cplus_stuff = 0x0}}
 > > (gdb) p *target
 > > $4 = {code = TYPE_CODE_VOID, name = 0x0, tag_name = 0x0, length = 1,
 > >   upper_bound_type = 0, lower_bound_type = 0, objfile = 0x854e998,
 > >   target_type = 0x0, pointer_type = 0x8bcd61c, reference_type = 0x0,
 > >   cv_type = 0x8bcd5d8, flags = 0, nfields = 0, fields = 0x0,
 > >   vptr_basetype = 0x0, vptr_fieldno = -1, type_specific = {arg_types =
 > > 0x0,
 > >     cplus_stuff = 0x0}}
 > > 
 > > As you see, TYPE_CODE_VOID does not have a name anymore, at least when
 > > it is the target of a (void *) type..
 > > 
 > 
 > 
 > -- 
 > Fernando Nasser
 > Red Hat Canada Ltd.                     E-Mail:  fnasser@redhat.com
 > 2323 Yonge Street, Suite #300
 > Toronto, Ontario   M4P 2C9
 > 

Re: Warning: something weird with void* types.

[Daniel Berlin]

--On Thursday, May 10, 2001 12:44 PM -0400 Fernando Nasser 
<fnasser@redhat.com> wrote:

> I can't believe nobody has anything to say about this...


Well, a quick looksie shows the only thing that could be causing this that 
i immediately see is in stabsread.c

You are using STABS, I assume, right?

Can you verify it doesn't occur with DWARF2, so I can generate a fix for 
the problem, or if it does occur with DWARF2, look elsewhere?

>
>
> Fernando Nasser wrote:
>>
>> FYI, we are having to make a change in Insight to cope with a funny
>> thing that recently appeared in GDB.
>>
>> The target type of a void* does not have the type name set to "void" any
>> longer.
>>
>> (gdb) p *type
>> $3 = {code = TYPE_CODE_PTR, name = 0x0, tag_name = 0x0, length = 4,
>>   upper_bound_type = 0, lower_bound_type = 0, objfile = 0x854e998,
>>   target_type = 0x8bcd5d8, pointer_type = 0x0, reference_type = 0x0,
>>   cv_type = 0x8bcd61c, flags = 1, nfields = 0, fields = 0x0,
>>   vptr_basetype = 0x0, vptr_fieldno = -1, type_specific = {arg_types =
>> 0x0,
>>     cplus_stuff = 0x0}}
>> (gdb) p *target
>> $4 = {code = TYPE_CODE_VOID, name = 0x0, tag_name = 0x0, length = 1,
>>   upper_bound_type = 0, lower_bound_type = 0, objfile = 0x854e998,
>>   target_type = 0x0, pointer_type = 0x8bcd61c, reference_type = 0x0,
>>   cv_type = 0x8bcd5d8, flags = 0, nfields = 0, fields = 0x0,
>>   vptr_basetype = 0x0, vptr_fieldno = -1, type_specific = {arg_types =
>> 0x0,
>>     cplus_stuff = 0x0}}
>>
>> As you see, TYPE_CODE_VOID does not have a name anymore, at least when
>> it is the target of a (void *) type..
>>
>
>
> --
> Fernando Nasser
> Red Hat Canada Ltd.                     E-Mail:  fnasser@redhat.com
> 2323 Yonge Street, Suite #300
> Toronto, Ontario   M4P 2C9

Re: Warning: something weird with void* types.

[Fernando Nasser]

Daniel Berlin wrote:
> 
> --On Thursday, May 10, 2001 12:44 PM -0400 Fernando Nasser
> <fnasser@redhat.com> wrote:
> 
> > I can't believe nobody has anything to say about this...
> 
> Well, a quick looksie shows the only thing that could be causing this that
> i immediately see is in stabsread.c
> 
> You are using STABS, I assume, right?
> 
> Can you verify it doesn't occur with DWARF2, so I can generate a fix for
> the problem, or if it does occur with DWARF2, look elsewhere?
> 

Dan,

I am currently on a trip and with very limited access to my stuff and I
will only be back Tuesday.

But I reproduced this problem on Linux debugging GDB with itself.

Cheers,
Fernando




> >
> >
> > Fernando Nasser wrote:
> >>
> >> FYI, we are having to make a change in Insight to cope with a funny
> >> thing that recently appeared in GDB.
> >>
> >> The target type of a void* does not have the type name set to "void" any
> >> longer.
> >>
> >> (gdb) p *type
> >> $3 = {code = TYPE_CODE_PTR, name = 0x0, tag_name = 0x0, length = 4,
> >>   upper_bound_type = 0, lower_bound_type = 0, objfile = 0x854e998,
> >>   target_type = 0x8bcd5d8, pointer_type = 0x0, reference_type = 0x0,
> >>   cv_type = 0x8bcd61c, flags = 1, nfields = 0, fields = 0x0,
> >>   vptr_basetype = 0x0, vptr_fieldno = -1, type_specific = {arg_types =
> >> 0x0,
> >>     cplus_stuff = 0x0}}
> >> (gdb) p *target
> >> $4 = {code = TYPE_CODE_VOID, name = 0x0, tag_name = 0x0, length = 1,
> >>   upper_bound_type = 0, lower_bound_type = 0, objfile = 0x854e998,
> >>   target_type = 0x0, pointer_type = 0x8bcd61c, reference_type = 0x0,
> >>   cv_type = 0x8bcd5d8, flags = 0, nfields = 0, fields = 0x0,
> >>   vptr_basetype = 0x0, vptr_fieldno = -1, type_specific = {arg_types =
> >> 0x0,
> >>     cplus_stuff = 0x0}}
> >>
> >> As you see, TYPE_CODE_VOID does not have a name anymore, at least when
> >> it is the target of a (void *) type..
> >>
> >
> >
> > --
> > Fernando Nasser
> > Red Hat Canada Ltd.                     E-Mail:  fnasser@redhat.com
> > 2323 Yonge Street, Suite #300
> > Toronto, Ontario   M4P 2C9

-- 
Fernando Nasser
Red Hat Canada Ltd.