[Bug c++/14998] GDB cannot handle pointer to member functions beingencoded with DW_TAG_ptr_to_member_type

["tromey at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=14998

--- Comment #6 from Tom Tromey <tromey at redhat dot com> 2013-01-07 19:01:17 UTC ---
This .s seems a little weird to me, but maybe I am confused.

When I look at the DWARF I see:

 <1><47>: Abbrev Number: 6 (DW_TAG_ptr_to_member_type)
    <48>   DW_AT_type        : <0x34>    
    <4c>   DW_AT_containing_type: <0x3f>    

which points to

 <1><34>: Abbrev Number: 3 (DW_TAG_subroutine_type)
    <35>   DW_AT_type        : <0x26>    
 <2><39>: Abbrev Number: 4 (DW_TAG_formal_parameter)
    <3a>   DW_AT_type        : <0x2d>    

0x2d is just

 <1><2d>: Abbrev Number: 2 (DW_TAG_base_type)
    <2e>   DW_AT_name        : (indirect string, offset: 0x46): float    
    <32>   DW_AT_encoding    : 4    (float)
    <33>   DW_AT_byte_size   : 4    


I was expecting the subroutine type to have an artificial parameter
for the "this" pointer.

I think if that was added then calling would work.


Printing the artificial argument appears to be a conscious decision.
>From c-typeprint.c:

Artificial arguments, such as "this"
   in non-static methods, are displayed if LINKAGE_NAME is zero

I think this is a bit weird though.  I wouldn't mind changing it or
perhaps adding a ptype flag to control it.

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