Integrated: 8338566: Lazy creation of exception instances is not thread safe

[Tobias Hartmann]

On Wed, 11 Sep 2024 14:17:30 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

> Similar to [JDK-8251923](https://bugs.openjdk.org/browse/JDK-8251923), we need a store-store barrier before publishing a handle because otherwise another thread could observe the handle before it's fully initialized and read null from it. This affects architectures with a weak memory model like AArch64.
> 
> Unfortunately, this only happened twice in our testing and I was never able to reproduce it.
> 
> Thanks,
> Tobias

This pull request has now been integrated.

Changeset: 269cd38b
Author:    Tobias Hartmann <thartmann at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/269cd38b55391364db0f92291eb29c3b6803db94
Stats:     109 lines in 6 files changed: 41 ins; 62 del; 6 mod

8338566: Lazy creation of exception instances is not thread safe

Reviewed-by: shade, kvn, dlong

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PR: https://git.openjdk.org/jdk/pull/20950