[lilliput-jdk17u:lilliput] RFR: 8319799: Recursive lightweight locking: x86 implementation [v2]

[Roman Kennke]

> Backports https://github.com/openjdk/jdk/commit/7f6bb71eb302e8388c959bdaa914b758a766d299
> 
> Implements the x86_64 parts of recursive lightweight locking.
> 
> Unclean, mostly because of biased locking.

Roman Kennke has updated the pull request incrementally with one additional commit since the last revision:

  Remove superfluous loading of mark-word

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Changes:
  - all: https://git.openjdk.org/lilliput-jdk17u/pull/84/files
  - new: https://git.openjdk.org/lilliput-jdk17u/pull/84/files/070ada8a..cfb057fc

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=lilliput-jdk17u&pr=84&range=01
 - incr: https://webrevs.openjdk.org/?repo=lilliput-jdk17u&pr=84&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/lilliput-jdk17u/pull/84.diff
  Fetch: git fetch https://git.openjdk.org/lilliput-jdk17u.git pull/84/head:pull/84

PR: https://git.openjdk.org/lilliput-jdk17u/pull/84