RFR: 8189685: need PerfMemory class update and a volatile_static_field support in VMStructs [v2]

[Yasumasa Suenaga]

On Wed, 23 Aug 2023 03:05:23 GMT, Chris Plummer <cjplummer at openjdk.org> wrote:

> SA only looks at _initialized, but I suppose you could argue that it also should be checking _destroyed before accessing PerfMemory.

In JDK-8151815, we do not clear fields in `PerfMemory` because they are used in SA even if they are freed, so we can ignore `_destroyed` in SA. We've discussed about this in [review thread of JDK-8151815](https://mail.openjdk.org/pipermail/serviceability-dev/2017-October/022050.html).

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PR Review Comment: https://git.openjdk.org/jdk/pull/15373#discussion_r1302485316