Re: [PATCH] Fix for the complaint observed when symbol reading due to unsupported .debug_names form.

Tom de Vries
2020-05-09T08:05:38Z

On 08-05-2020 17:16, Tom de Vries wrote:
> On 08-05-2020 16:36, Tom de Vries wrote:
>> On 07-05-2020 15:26, Tom Tromey wrote:
>>>>>>>> ">" == nitachra <Nitika.Achra@amd.com> writes:
>>>
>>>>> Following complaint is observed with the executable compiled with -gdwarf-5
>>>>> and -gpubnames flags- "During symbol reading: Unsupported .debug_names form
>>>>> DW_FORM_ref4". This is the form corresponding to DW_IDX_die_offset attribute.
>>>>> This patch fixes this complaint. Tested with clang 10.0.0. Test case used-
>>>
>>>>> int main()
>>>>> {
>>>>> int sum,a,b;
>>>>> sum = a + b;
>>>>> return sum;
>>>>> }
>>>
>>> Does it fail some existing test in the gdb testsuite?
>>
>> I don't think so, that is, not unless you use:
>> - clang as CC_FOR_TARGET, and
>> - target board unix/-gdwarf-5/-gpubnames.
>>
>>> Normally what we like to see is either that a patch fixes some existing
>>> failure (perhaps when the test suite is run in a certain way); or a new
>>> test that fails before the patch and passes afterward.
>>>
>>
>> I've add a dwarf assembly test-case for this (
>> https://sourceware.org/pipermail/gdb-patches/2020-May/168244.html ).
>>
>> It should kfail without this patch, and pass with this patch (though it
>> doesn't pass for me on openSUSE due to the problem described in PR25941).
>>
>
> So, if someone can verify that the test-case passes with this patch,
> I'll commit.

I've done this on an ubuntu 18.04 system.

Committed.

Thanks,
- Tom