Re: [PATCH RFA/RFC] Address class support

[Andrew Cagney <ac131313 at redhat dot com>]

> Index: dwarf2read.c
> ===================================================================
> RCS file: /cvs/src/src/gdb/dwarf2read.c,v
> retrieving revision 1.68
> diff -u -p -r1.68 dwarf2read.c
> --- dwarf2read.c	9 Oct 2002 04:43:49 -0000	1.68
> +++ dwarf2read.c	16 Oct 2002 00:15:07 -0000
> @@ -683,6 +683,10 @@ static struct complaint dwarf2_invalid_a
>  {
>    "invalid attribute class or form for '%s' in '%s'", 0, 0
>  };
> +static struct complaint dwarf2_invalid_pointer_size = 
> +{
> +  "invalid pointer size %d", 0, 0
> +};
Please use the new complaint() interface.

> +F:2:ADDRESS_CLASS_TYPE_FLAGS_TO_NAME:char *:address_class_type_flags_to_name:int type_flags:type_flags
Is it possible to ``const char *'' propogate this 
(address_space_int_to_name()) would need to be changed?

> +F:2:ADDRESS_CLASS_NAME_TO_TYPE_FLAGS:int:address_class_name_to_type_flags:char *name, int *type_flags_ptr:name, type_flags_ptr
>  EOF
>  }
>  
> Index: gdbtypes.c
> ===================================================================
> RCS file: /cvs/src/src/gdb/gdbtypes.c,v
> retrieving revision 1.59
> diff -u -p -r1.59 gdbtypes.c
> --- gdbtypes.c	2 Oct 2002 22:01:53 -0000	1.59
> +++ gdbtypes.c	16 Oct 2002 00:15:10 -0000
> @@ -397,11 +397,15 @@ lookup_function_type (struct type *type)
>  extern int
>  address_space_name_to_int (char *space_identifier)
>  {
> +  int type_flags;
>    /* Check for known address space delimiters. */
>    if (!strcmp (space_identifier, "code"))
>      return TYPE_FLAG_CODE_SPACE;
>    else if (!strcmp (space_identifier, "data"))
>      return TYPE_FLAG_DATA_SPACE;
> +  else if (ADDRESS_CLASS_NAME_TO_TYPE_FLAGS_P ()
> +           && ADDRESS_CLASS_NAME_TO_TYPE_FLAGS (space_identifier, &type_flags))
> +    return type_flags;
>    else
>      error ("Unknown address space specifier: \"%s\"", space_identifier);
>  }
> @@ -416,6 +420,9 @@ address_space_int_to_name (int space_fla
>      return "code";
>    else if (space_flag & TYPE_FLAG_DATA_SPACE)
>      return "data";
> +  else if ((space_flag & TYPE_FLAG_ADDRESS_CLASS_ALL)
> +           && ADDRESS_CLASS_TYPE_FLAGS_TO_NAME_P ())
> +    return ADDRESS_CLASS_TYPE_FLAGS_TO_NAME (space_flag);
>    else
>      return NULL;
>  }
Is there a lurking bug here?  Is something like:

	@short @data

valid (I think so) yet, the above can only print one of those names. 
Similarly should something like:

	@code @data

be rejected?

Looking at the use of these functions.  Everything is refering to 
``address space'' vis:

  address_space_id = address_space_int_to_name (TYPE_INSTANCE_FLAGS 
(type));
  if (address_space_id)
    {
      if (did_print_modifier || need_pre_space)
        fprintf_filtered (stream, " ");
      fprintf_filtered (stream, "@%s", address_space_id);
      did_print_modifier = 1;
    }

yet with this patch, that is definitly no longer true!  I think the 
calling code needs to be updated so that it uses a more meaningful name.

How would code use this to add an ``@io'' pointer?

Andrew