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From: "tromey at sourceware dot org" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug gdb/23710] gdb is slow and memory hungry consuming debug
 generated with LTO by GCC
Date: Fri, 11 Jun 2021 15:02:51 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D23710

--- Comment #22 from Tom Tromey <tromey at sourceware dot org> ---
(In reply to Tom de Vries from comment #21)
> (In reply to Tom Tromey from comment #20)
> > Tom --
> >=20
> > See https://sourceware.org/pipermail/gdb-patches/2021-June/179765.html
> > I found out that if the test case from this patch is changed
> > to use DW_LANG_C, it will fail.  (Of course I thinko'd that message
> > and wrote C++, but the test already uses C++...)
> >=20
>=20
> You mean gdb.dwarf2/imported-unit-bp.exp? That test-case uses C, right?

Yeah,sorry.  I double confused myself I guess.

If you convert that test to use DW_LANG_C_plus_plus, then run it, it will f=
ail.
So it seems to me that this patch had some unintended consequence.
I haven't looked into why, and TBH it doesn't really make sense to me.

> > Furthermore, the skipping should probably also be done in the psymtab
> > reader, not just the full reader.
>=20
> Maybe, not sure yet.

Normally the rule is that the psymtab reader and the full symtab reader
must agree.  Now, this case is a bit weird in that nothing really checks
whether a psymtab dependency is really read in.  Though, the above failure
seems to indicate that it may matter.

--=20
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