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From: "sam at gentoo dot org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/31372] _dl_tlsdesc_dynamic doesn't preserve all
 caller-saved registers
Date: Thu, 15 Feb 2024 21:07:48 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D31372

--- Comment #8 from Sam James <sam at gentoo dot org> ---
(In reply to H.J. Lu from comment #7)
> (In reply to Sam James from comment #6)
> > I feel like this emphasises that we need to look at
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D48868.
>=20
> GCC testsuite isn't set up to support run-time tests with extra library
> dependencies.  For now, we can add GNU2 TLS run-time tests to glibc.

gcc.dg/torture/tls has some basic tests but only with a single TU. We could=
 add
 -mtls-dialect=3Dgnu2 to tls.exp in DG_TORTURE_OPTIONS but it would not gai=
n us
much.

I hoped that there might be some for IPA or LTO but looks like no.

> My glibc patch:
> [...]
> includes one.  So far, it has detected the GNU2 TLS bug on 3 arches.

Ah, thanks, I hadn't looked at it. I guess this with nsz's previous tests
should give us OK coverage for now.

--=20
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