RFR: 8333791: Fix memory barriers for @Stable fields [v2]

[Vladimir Ivanov]

On Wed, 31 Jul 2024 18:53:43 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> src/hotspot/share/runtime/globals.hpp line 1997:
>> 
>>> 1995:           "Use a terrible hash function in order to generate many collisions.") \
>>> 1996:                                                                             \
>>> 1997:   develop(bool, RestrictStable, true,                                       \
>> 
>> What's the use case for the flag? Solely for testing purposes (since it's develop)? 
>> Alternatively, you could place the test classes on boot class path and enable test execution with product binaries.
>
> Yes, to access the annotation from test, like `RestrictContended` nearby:
> https://github.com/openjdk/jdk/blob/97f7c03dd0ff389abefed7ea2a7257bcb42e0754/src/hotspot/share/classfile/classFileParser.cpp#L1960
> 
> Not sure if putting test classes on bootclasspath would work well with IR tests that are now running in driver mode. I'd prefer to keep the develop flag and keep tests in driver mode and without additional fluff.

`RestrictContended` and `RestrictReservedStack` are product flags.

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PR Review Comment: https://git.openjdk.org/jdk/pull/19635#discussion_r1698997608