[Bug c++/37590] New: g++ should emit different debug info for variable's type

["tromey at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Consider this code:

#include <string>
std::string s;

I compiled this with -g and examined the resulting dwarf.
's' is represented as:

 <1><24e8>: Abbrev Number: 63 (DW_TAG_variable)
  <24e9>     DW_AT_name        : s      
  <24eb>     DW_AT_decl_file   : 1      
  <24ec>     DW_AT_decl_line   : 3      
  <24ed>     DW_AT_type        : <24dd> 
  <24f1>     DW_AT_external    : 1      
  <24f2>     DW_AT_location    : 5 byte block: 3 0 0 0 0        (DW_OP_addr: 0)

The type of s is:

 <1><24dd>: Abbrev Number: 3 (DW_TAG_typedef)
  <24de>     DW_AT_name        : (indirect string, offset: 0xf4e): string       
  <24e2>     DW_AT_decl_file   : 17     
  <24e3>     DW_AT_decl_line   : 61     
  <24e4>     DW_AT_type        : <f51>  

However, the declared type is not 'string', it is 'std::string'.
I think it would be better to always emit the declared type
as it appears in the source.  That way, "whatis s" in gdb will give an
answer which is expected by the user, and which is a valid type name
at the point of declaration.


-- 
           Summary: g++ should emit different debug info for variable's type
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tromey at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37590