[lilliput-jdk17u:lilliput] RFR: 8308107: [Lilliput/JDK17] Cherry-pick: 8291555: Implement alternative fast-locking scheme [v2]

[Roman Kennke]

> This brings "8291555: Implement alternative fast-locking scheme" into lilliput/jdk17. Lots of small improvements, most importantly the fixed-size lock-stack, plus tons of testing and reviews that went into the upstream change that went into JDK21.
> 
> Testing:
>  - [x] tier1 (x86, x86_64, aarch64)
>  - [x] tier2 (x86, x86_64, aarch64)

Roman Kennke has updated the pull request incrementally with two additional commits since the last revision:

 - 32bit build fix
 - Replace some nullptr with NULL

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

Changes:
  - all: https://git.openjdk.org/lilliput-jdk17u/pull/19/files
  - new: https://git.openjdk.org/lilliput-jdk17u/pull/19/files/e83f37f6..19c27f12

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=lilliput-jdk17u&pr=19&range=01
 - incr: https://webrevs.openjdk.org/?repo=lilliput-jdk17u&pr=19&range=00-01

  Stats: 29 lines in 6 files changed: 0 ins; 17 del; 12 mod
  Patch: https://git.openjdk.org/lilliput-jdk17u/pull/19.diff
  Fetch: git fetch https://git.openjdk.org/lilliput-jdk17u.git pull/19/head:pull/19

PR: https://git.openjdk.org/lilliput-jdk17u/pull/19