RFR: RISC-V: Allow virtual thread preemption on some common class initialization paths [v2]

[duke]

On Tue, 14 Oct 2025 01:41:39 GMT, Fei Yang <fyang at openjdk.org> wrote:

>> This adds RISC-V support for : https://bugs.openjdk.org/browse/JDK-8369238
>> 
>> Testing performed on linux-riscv64 platform:
>> - [x] hs:tier1 - hs:tier3 (release)
>> - [x] make test TEST="hotspot_loom jdk_loom" (release)
>> - [x] make test TEST="hotspot_loom jdk_loom" TEST_VM_OPTS="-XX:+VerifyStack -XX:+VerifyContinuations" (fastdebug)
>
> Fei Yang has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:
> 
>  - Merge remote-tracking branch 'upstream/fibers' into 8369238-riscv64
>  - RISC-V: Allow virtual thread preemption on some common class initialization paths

@RealFYang 
Your change (at version 0e1b94f9b643eb862dfa2e8565b8770db7a32930) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/loom/pull/222#issuecomment-3400468729