RFR: 8369444: JavaFrameAnchor on PPC64 has unnecessary barriers

[Dean Long]

On Mon, 13 Oct 2025 11:48:42 GMT, David Briemann <dbriemann at openjdk.org> wrote:

> No hardware barriers are necessary. All members are volatile and the profiler is run from a signal handler and only observers the thread its running on.

If all CPU ports follow this, then it seems like we could eventually implement JavaFrameAnchor in shared code without CPU-specific parts.

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PR Comment: https://git.openjdk.org/jdk/pull/27768#issuecomment-3399555486