On 08/22/2018 08:56 AM, Tom de Vries wrote: > This is an undocumented developer-only option, because using this option may > change behaviour of dwarf consumers, f.i., gdb shows the artificial variables: > ... > (gdb) info locals > a = 0x7fffffffda90 "\005" > D.4278 = <optimized out> > ...
I just found in the dwarf 5 spec the attribute DW_AT_description (present since version 3): ... 2.20 Entity Descriptions Some debugging information entries may describe entities in the program that are artificial, or which otherwise have a “name” that is not a valid identifier in the programming language. This attribute provides a means for the producer to indicate the purpose or usage of the containing debugging infor Generally, any debugging information entry that has, or may have, a DW_AT_name attribute, may also have a DW_AT_description attribute whose value is a null-terminated string providing a description of the entity. It is expected that a debugger will display these descriptions as part of displaying other properties of an entity. ... AFAICT, gdb currently does not explicitly handle this attribute, which I think means it's ignored. It seems applicable to use DW_AT_description at least for the artificial decls. Perhaps even for all cases that are added by the patch? I'll rewrite the patch. Thanks, - Tom
