RFR: 8291555: Replace stack-locking with fast-locking [v7]

[David Holmes]

On Thu, 27 Oct 2022 20:38:57 GMT, John R Rose <jrose at openjdk.org> wrote:

> So the data structure for lock records (per thread) could consist of a series of distinct values [ A B C ] and each of the values could be repeated, but only adjacently: [ A A A B C C ] for example.
@rose00 why only adjacently? Nested locking can be interleaved on different monitors.

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PR: https://git.openjdk.org/jdk/pull/10590