[Elftoolchain-developers] Support for debug_types section?

[Sebastian M. <me...@ab...>]

Hello Developers,

I am using your libdwarf (0.6.1) in some proof-of-concept code to parse Dwarf debug info.
While it works quite nice my "normal" Dwarf3&4 binaries, I run into trouble with the debug_types section (If I force the creation with g++-4.7 -gdwarf-4 -fdebug-types-section).

My question: Is it possible you do not yet support that section?
Do you plan to support it? If so: How & when?
Or is my binary just broken (it's a very minimal example with forced debug_types section).

What I did seems correct to me:
> rc = dwarf_init(fd, DW_DLC_READ, NULL, NULL, &dbg, &de);
> check_rc("dwarf_init", rc, true);
>
> rc = dwarf_get_types(dbg, &types, &count, &de);
> check_rc("dwarf_get_types", rc, false);
>
> printf("Got %lli elements\n", count);
> if(count > 0) {
>     for(int i = 0; i < count; i++) {
>         rc = dwarf_typename(types[i], &str, &de);
>         if(rc != DW_DLV_OK) str = "[invalid]";
>         printf("Type #%i is %s\n", i, str);
>     }
> }

Output -- every . is an invalid char (like 0x004):
> Type #0 is �
> Type #1 is 
> Type #2 is L
..
> Type #3 is 
...
> Type #11 is 
> Type #12 is .int
> Type #13 is 
> Type #14 is w
> Type #15 is .    ...	

> Type #16 is U

According to the docs the function should be used with the ".debug_typename" section, but according to the source it works on the ".debug_types"...

Note: The SGI libdwarf seems to support the debug_types section since version 20111030.
Though I didn't try it out on my example (I can do that next week, if you want to ;)).


Thanks for any hints to what I might be missing (& thanks for the library :)
Sebastian

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