[crac] Integrated: 8372863: [CRaC] Fix glibc IFUNC for AVX_Fast_Unaligned_Load

[Jan Kratochvil]

On Tue, 2 Dec 2025 10:55:28 GMT, Jan Kratochvil <jkratochvil at openjdk.org> wrote:

> glibc derives `AVX_Fast_Unaligned_Load` from CPU features but it is based on hardware CPU features and so disabling a CPU feature required for `AVX_Fast_Unaligned_Load` will not disable `AVX_Fast_Unaligned_Load` itself and it needs an explicit `GLIBC_TUNABLES` environment variable disabling.
> 
> There is a whole such category of 'preferred' bits. I hope no other bit causes crash (as they are there primarily for performance benefits) but that should be still verified.

This pull request has now been integrated.

Changeset: 238aa213
Author:    Jan Kratochvil <jkratochvil at openjdk.org>
Committer: Radim Vansa <rvansa at openjdk.org>
URL:       https://git.openjdk.org/crac/commit/238aa21340fc1ba2e2777f0e36153abec163c47e
Stats:     29 lines in 4 files changed: 21 ins; 1 del; 7 mod

8372863: [CRaC] Fix glibc IFUNC for AVX_Fast_Unaligned_Load

Reviewed-by: rvansa

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PR: https://git.openjdk.org/crac/pull/277