RFR: 8320272: Make method_entry_barrier address shared

[Vladimir Kozlov]

On Mon, 20 Nov 2023 04:14:57 GMT, Fei Yang <fyang at openjdk.org> wrote:

>>> This seems fine, but you could explain a little more why this is useful for Leyden? I would think having StubRoutines::method_entry_barrier() would be enough, and that it could reference the existing platform-specific name, minimizing changes. I don't understand why the storage needs to be shared in StubRoutines::_method_entry_barrier, for example.
>> 
>> Thank you for looking, Dean. Yes, your suggestion would work too. Leyden code calls StubRoutines::method_entry_barrier() to get address: [SCCache.cpp#L3337](https://github.com/openjdk/leyden/blob/premain/src/hotspot/share/code/SCCache.cpp#L3337)
>> But we would need StubRoutines::method_entry_barrier()  implementation for each platform in such case. And having duplication and different names does not feel right for me ;^)
>
> @vnkozlov : Hi, I have tested this on linux-riscv platform. Result looks fine.
> Would you mind apply following small add-on change which adds relocation info for this platform too? Thanks.
> [16708-riscv.diff.txt](https://github.com/openjdk/jdk/files/13406179/16708-riscv.diff.txt)

Thank you, @RealFYang, for testing. I applied your patch.

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

PR Comment: https://git.openjdk.org/jdk/pull/16708#issuecomment-1819584853