------- Comment #7 from jakub at gcc dot gnu dot org 2008-08-18 08:11 -------
To expand on the duplicate DIE issue in C++, say:
namespace N
{
int i;
}
int foo ()
{
using N::i;
return i;
}
emits:
.uleb128 0x3 # (DIE (0x55) DW_TAG_imported_declaration)
.byte 0x1 # DW_AT_decl_file (mno2.C)
.byte 0x7 # DW_AT_decl_line
.long 0x6d # DW_AT_import
in foo (correct) and then:
.uleb128 0x5 # (DIE (0x64) DW_TAG_namespace)
.ascii "N\0" # DW_AT_name
.byte 0x1 # DW_AT_decl_file (mno2.C)
.byte 0x2 # DW_AT_decl_line
.long 0x8c # DW_AT_sibling
.uleb128 0x6 # (DIE (0x6d) DW_TAG_variable)
.ascii "i\0" # DW_AT_name
.byte 0x1 # DW_AT_decl_file (mno2.C)
.byte 0x3 # DW_AT_decl_line
.long .LASF0 # DW_AT_MIPS_linkage_name: "_ZN1N1iE"
.long 0x5d # DW_AT_type
.byte 0x1 # DW_AT_external
.byte 0x1 # DW_AT_declaration
.uleb128 0x6 # (DIE (0x7c) DW_TAG_variable)
.ascii "i\0" # DW_AT_name
.byte 0x1 # DW_AT_decl_file (mno2.C)
.byte 0x3 # DW_AT_decl_line
.long .LASF0 # DW_AT_MIPS_linkage_name: "_ZN1N1iE"
.long 0x5d # DW_AT_type
.byte 0x1 # DW_AT_external
.byte 0x1 # DW_AT_declaration
.byte 0x0 # end of children of DIE 0x64
.uleb128 0x7 # (DIE (0x8c) DW_TAG_variable)
.long 0x7c # DW_AT_specification
.byte 0x9 # DW_AT_location
.byte 0x3 # DW_OP_addr
.quad _ZN1N1iE
.byte 0x0 # end of children of DIE 0xb
Note not just 2, but 3, 2 DW_AT_declaration inside and one DW_AT_specification
DIE outside of the namespace. If extern int i; is used instead, then the
DW_AT_specification is missing.
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu dot
| |org, drow at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29635
