RFR: 8310513: [s390x] Intrinsify recursive ObjectMonitor locking [v2]

[Amit Kumar]

> s390 implementation of [JDK-8277180](https://bugs.openjdk.org/browse/JDK-8277180). PPC implementation for the same: https://github.com/openjdk/jdk/pull/7305
> 
> I had tested `tier1` on `fastdebug`, `release` vm. 
> 
> BenchMarking: 
> 
> 
> ./build/linux-s390x-server-release/jdk/bin/java -Xms4g -Xmx4g -jar dacapo-9.12-MR1-bach.jar h2 -s huge -t 1 -n 1
> 
> without patch: 
> ===== DaCapo 9.12-MR1 h2 PASSED in 223023 msec =====
> ===== DaCapo 9.12-MR1 h2 PASSED in 225686 msec =====
> ===== DaCapo 9.12-MR1 h2 PASSED in 219824 msec =====
> ===== DaCapo 9.12-MR1 h2 PASSED in 226719 msec =====
> 
> 
> 
> with patch: 
> ===== DaCapo 9.12-MR1 h2 PASSED in 167816 msec =====
> ===== DaCapo 9.12-MR1 h2 PASSED in 174368 msec =====
> ===== DaCapo 9.12-MR1 h2 PASSED in 170517 msec =====
> ===== DaCapo 9.12-MR1 h2 PASSED in 169349 msec =====

Amit Kumar has updated the pull request incrementally with one additional commit since the last revision:

  suggestion from Lutz

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17975/files
  - new: https://git.openjdk.org/jdk/pull/17975/files/13f41304..9f48baa9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17975&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17975&range=00-01

  Stats: 7 lines in 1 file changed: 4 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/17975.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17975/head:pull/17975

PR: https://git.openjdk.org/jdk/pull/17975