Re: [Valgrind-developers] [valgrind] Rewrite DWARF inlined subroutine handling to work cross CU

[Mark W. <ma...@kl...>]

Hi Paul,

On Fri, 2025-06-20 at 07:49 +0200, Paul Floyd via Valgrind-developers
wrote:
> On 6/19/25 23:59, Mark Wielaard wrote:
> > https://sourceware.org/git/gitweb.cgi?p=valgrind.git;h=f7dccaab11b8dc1af2bbcd31dea5bb7a50c6f811
> > 
> > commit f7dccaab11b8dc1af2bbcd31dea5bb7a50c6f811
> > Author: Mark Wielaard <ma...@kl...>
> > Date:   Thu May 29 23:41:52 2025 +0200
> > 
> >      Rewrite DWARF inlined subroutine handling to work cross CU
> 
> On FreeBSD 14.2 amd64 I'm getting 8 new failures. They all have 
> something like
> 
> +Warning: DW_TAG_subprogram with no DW_AT_name and no 
> DW_AT_specification or DW_AT_abstract_or
> igin in /home/paulf/z400/paulf/scratch/valgrind/drd/tests/std_list

Which failures are those? Are they all about std_list or also other
objects? Which compiler version was used?

Could you upload/sent the readelf --debug-dump=info drd/tests/std_list
output somewhere? Probably gzipped.

The Warning says there is a DW_TAG_subprogram that has no name and no
reference to another subprogram that could describe it. Which means the
subprogram is not very useful. I wonder why. Maybe a bug in the
compiler? Or an artificial function without a name?

Were those tests run with -q? The Warning shouldn't show up then.
Maybe we should filter out those Warning messages in some stderr
filter?

Or maybe the Warning should be behind -v since there isn't really
something the user can do about it, except recompile their program with
another compiler?

Cheers,

Mark