[Dwarf-Discuss] DW_AT_specification chains
Michael Eager
eager@eagercon.com
Thu Apr 24 16:03:49 GMT 2008
Marcel Mettes wrote:
> Thanks for all replies, I do have an improved understanding of the matter.
>
> As request here a real example, this time with a C++ class member
> function instead of a variable.
>
> This is the output of our prototype C++ tool-chain. We are kind-of
> forced to split the debug info into multiple compilation units due to
> using multiple independent tools in the tool-chain to perform the
> complete compilation process.
>
> Best regards,
> Marcel
> -----------------------------------------------
> Concerns the debug info for the method "extra_class_method"
>
> | + 0x2E DW_TAG_subprogram
> | | offset 0x3039
> | | abbrev ID 0x13
> | | 0x03 DW_AT_name 0x08 DW_FORM_string :
> "extra_class_method"
> | | 0x49 DW_AT_type 0x13 DW_FORM_ref4 :
> 0x2EE3
> | | 0x27 DW_AT_prototyped 0x0C DW_FORM_flag : 1
> | | 0x32 DW_AT_accessibility 0x0F DW_FORM_udata : 0x1
> | | DW_ACCESS_public
> | | 0x3F DW_AT_external 0x0C DW_FORM_flag : 1
> | | 0x3A DW_AT_decl_file 0x0F DW_FORM_udata : 0x2
> | | 0x3B DW_AT_decl_line 0x0F DW_FORM_udata : 0xB
> | | 0x39 DW_AT_decl_column 0x0F DW_FORM_udata : 0x6
> | | 0x3C DW_AT_declaration 0x0C DW_FORM_flag : 1
> | |
> ...
> |
> + 0x2E DW_TAG_subprogram
> | offset 0x30DE
> | abbrev ID 0x16
> | 0x47 DW_AT_specification 0x13 DW_FORM_ref4 : 0x3039
This looks OK to me, although I would expect that the definition
for "extra_class_method" at offset 0x30DE would contain additional
information, such as the line number, high/low PC, etc.
--
Michael Eager eager at eagercon.com
1960 Park Blvd., Palo Alto, CA 94306 650-325-8077
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