RFR: 8356153: Shenandoah stubs are missing in AOT Code Cache addresses table

[Aleksey Shipilev]

On Mon, 5 May 2025 09:19:40 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> See the bug for reproducer. We actually have similar Shenandoah hunks down in Leyden repository, but we have apparently missed them when upstreaming [JDK-8350209](https://bugs.openjdk.org/browse/JDK-8350209). We only need a small subset of stubs that adapters use: pre-barriers and phantom load-barriers. This matches what we do for G1 and Z as well.
> 
> Additional testing:
>  - [x] Linux x86_64 server fastdebug, `runtime/cds`
>  - [x] Linux x86_64 server fastdebug, `runtime/cds` with `-XX:+UseShenandoahGC`

Thanks!

I am integrating to unblock AOT testing with various GCs.

-------------

PR Comment: https://git.openjdk.org/jdk/pull/25028#issuecomment-2851554905