[PATCH] bfd: release the PE COMDAT hash once all sections are made

[Oleg Tolmatcev]

пт, 21 авг. 2026 г. в 13:51, Jan Beulich <jbeulich@suse.com>:
>
> On 20.08.2026 21:23, Oleg Tolmatcev wrote:
> > styp_to_sec_flags builds pe_data (abfd)->comdat_hash, one entry plus a
> > strdup'd symbol name per input section.  Nothing frees it during a link,
> > so it survives to exit.
> >
> > Free it once the section table has been built.  This is safe because
> > styp_to_sec_flags recreates the hash whenever it finds it NULL.
> >
> > This significantly reduces peak memory usage.
>
> This is the positive side. How much extra overhead does recreating the
> hash impose? How often might it need recreating in the worst case? Looks
> like the answer is zero / never (make_a_section_from_file() is called
> solely from coff_real_object_p(), and is the sole caller of
> bfd_coff_styp_to_sec_flags_hook()), but your description suggests
> otherwise. May I suggest to replace the paragraph with
>
> "Free it once the section table has been built.  This is safe because
>  styp_to_sec_flags() would recreate the hash whenever it finds it NULL.
>  That's not presently necessary, though."
>
> ? If that's okay with you, I can replace the piece of text while
> committing.
>
> Jan

I am of course okay with that too. Thank you.

Oleg