Integrated: 8286476: x86_32: Fix crashes with non-preview mode after JDK-8284161 (Virtual Threads)

[Aleksey Shipilev]

On Tue, 10 May 2022 13:42:03 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Virtual Threads are not fully implemented on x86_32. The feature is guarded with `--enable-preview`. But there is some VM code that is executed unconditionally anyway, crashing the VM on some tests. This improves the x86_32 code to the point that tests without `--enable-preview` run successfully. This adds the scaffolding for full implementation too. 
> 
> Additional testing:
>  - [x] Linux x86_32 fastdebug, `tier1` failures only with `--enable-preview`
>  - [x] Linux x86_32 fastdebug, `tier2` failures only with `--enable-preview`

This pull request has now been integrated.

Changeset: ae695d6c
Author:    Aleksey Shipilev <shade at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/ae695d6cb79afbca6e38ede59b366ec55eced76a
Stats:     131 lines in 2 files changed: 122 ins; 4 del; 5 mod

8286476: x86_32: Fix crashes with non-preview mode after JDK-8284161 (Virtual Threads)

Reviewed-by: coleenp, stuefe

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PR: https://git.openjdk.java.net/jdk/pull/8630