Re: [PATCH v2 0/9] pahole: Support cross-CU type references and dwz alternate debug files

[Arnaldo Carvalho de Melo <acme@kernel.org>]

On Fri, Aug 21, 2026 at 06:34:59PM -0300, Arnaldo Carvalho de Melo wrote:
> From: Arnaldo Carvalho de Melo <acme@redhat.com>
> 
> Add support for cross-CU type references and dwz alternate debug
> files so pahole can process binaries (e.g. a perf binary with rust
> objects, or Firefox) that use DW_FORM_ref_addr inter-CU references or
> dwz-compressed .dwz alternate debug files.
> 
> Cross-CU type references:
> 
>   Force-merge CUs that contain inter-CU references (DW_FORM_ref_addr)
>   so type lookups resolve correctly.  Handle same-file partial units
>   where types are shared across CUs via DW_TAG_imported_unit.  Fix
>   cus__merging_cu failing to detect DW_FORM_ref_addr when
>   DW_FORM_implicit_const causes dwarf_getabbrevattr() to fail.

I did a lot of test runs, and with the patches that are waiting for this
series to be landed that stress even more this series, so I'll merge
this tomorrow unless anybody have anything against it.

And then as a followup I'll land a series of test patches that don't
affect the functioning of these tools, just do coverage analysis and add
lots more tests for its features.

We need to release a new version as there are people asking for features
developed and not yet released, so I'll make sure we get the goodies in
and the release out ASAP,

Best regards,

- Arnaldo