On Thu, Jan 28, 2021 at 12:00 PM Arnaldo Carvalho de Melo
[off-list ref] wrote:

Em Thu, Jan 21, 2021 at 08:11:17PM -0800, Andrii Nakryiko escreveu:

quoted

On Thu, Jan 21, 2021 at 6:07 PM Sedat Dilek [off-list ref] wrote:

quoted

Do you want Nick's DWARF v5 patch-series as a base?

quoted

Arnaldo was going to figure out the DWARF v5 problem, so I'm leaving
it up to him. I'm curious about DWARF v4 problems because no one yet
reported that previously.

I think I have the reported one fixed, Andrii, can you please do
whatever pre-release tests you can in your environment with what is in:

Hi Arnaldo,

Sorry for the delay, just back from a short PTO.

It all looks to be working fine on my side. There is a compilation
error in our libbpf CI when building the latest pahole from sources
due to DW_FORM_implicit_const being undefined. I'm updating our VMs to
use Ubuntu Focal 20.04, up from Bionic 18.04, and that should
hopefully solve the issue due to newer versions of libdw. If you worry
about breaking others, though, we might want to add #ifndef guards and
re-define DW_FORM_implicit_const as 0x21 explicitly in pahole source
code.

But otherwise, all good from what I can see in my environment. Looking
forward to 1.20 release! I'll let you know if, after updating to
Ubuntu Focal, any new pahole issues crop up.

https://git.kernel.org/pub/scm/devel/pahole/pahole.git/log/?h=DW_AT_data_bit_offset

?

The cset has the tests I performed and the references to the bugzilla
ticket and Daniel has tested as well for his XDR + gcc 11 problem.

Thanks,

- Arnaldo