[jdk23u] RFR: 8333716: Shenandoah: Check for disarmed method before taking the nmethod lock

[Neethu Prasad]

Backport of [JDK-8333716](https://bugs.openjdk.org/browse/JDK-8333716).
Change has already been backported to 21 and 17.

**Testing**
1. hotspot_gc tests

2. Benchmarking on [c6a.12xlarge](https://aws.amazon.com/ec2/instance-types/c6a/)
Prior to PR:

dev-dsk-neethp-jdk-2c-ad54955c % jdk23u/build/linux-x86_64-server-release/images/jdk/bin/java -Xmx1g -Xms1g -XX:+UseShenandoahGC -Xlog:gc ManyThreadsStacks.java 2>&1 | grep "marking roots"
[0.666s][info][gc] GC(0) Concurrent marking roots 70.709ms
[0.769s][info][gc] GC(1) Concurrent marking roots 77.658ms
[0.876s][info][gc] GC(2) Concurrent marking roots 86.840ms
[0.966s][info][gc] GC(3) Concurrent marking roots 72.479ms
[1.066s][info][gc] GC(4) Concurrent marking roots 82.360ms
[1.272s][info][gc] GC(5) Concurrent marking roots 76.854ms
[1.403s][info][gc] GC(6) Concurrent marking roots 81.824ms
[1.541s][info][gc] GC(7) Concurrent marking roots 83.342ms
[1.686s][info][gc] GC(8) Concurrent marking roots 89.838ms
[1.849s][info][gc] GC(9) Concurrent marking roots 88.486ms
[2.001s][info][gc] GC(10) Concurrent marking roots 78.584ms
[2.143s][info][gc] GC(11) Concurrent marking roots 85.297ms
[2.280s][info][gc] GC(12) Concurrent marking roots 78.562ms
[2.409s][info][gc] GC(13) Concurrent marking roots 78.005ms
[2.543s][info][gc] GC(14) Concurrent marking roots 77.846ms
[2.682s][info][gc] GC(15) Concurrent marking roots 88.989ms
[2.816s][info][gc] GC(16) Concurrent marking roots 81.305ms
[2.954s][info][gc] GC(17) Concurrent marking roots 73.452ms
[3.084s][info][gc] GC(18) Concurrent marking roots 71.614ms



After PR:


dev-dsk-neethp-jdk-2c-ad54955c % jdk23u/build/linux-x86_64-server-release/images/jdk/bin/java -Xmx1g -Xms1g -XX:+UseShenandoahGC -Xlog:gc ManyThreadsStacks.java 2>&1 | grep "marking roots"
[0.620s][info][gc] GC(0) Concurrent marking roots 5.057ms
[0.645s][info][gc] GC(1) Concurrent marking roots 3.123ms
[0.669s][info][gc] GC(2) Concurrent marking roots 3.256ms
[0.690s][info][gc] GC(3) Concurrent marking roots 2.654ms
[0.712s][info][gc] GC(4) Concurrent marking roots 2.518ms
[0.944s][info][gc] GC(5) Concurrent marking roots 3.363ms
[1.016s][info][gc] GC(6) Concurrent marking roots 2.768ms
[1.085s][info][gc] GC(7) Concurrent marking roots 2.461ms
[1.154s][info][gc] GC(8) Concurrent marking roots 2.800ms
[1.224s][info][gc] GC(9) Concurrent marking roots 3.097ms
[1.295s][info][gc] GC(10) Concurrent marking roots 2.878ms
[1.365s][info][gc] GC(11) Concurrent marking roots 2.745ms
[1.436s][info][gc] GC(12) Concurrent marking roots 3.011ms
[1.506s][info][gc] GC(13) Concurrent marking roots 3.098ms
[1.577s][info][gc] GC(14) Concurrent marking roots 3.157ms
[1.646s][info][gc] GC(15) Concurrent marking roots 2.732ms
[1.717s][info][gc] GC(16) Concurrent marking roots 2.572ms
[1.788s][info][gc] GC(17) Concurrent marking roots 2.899ms
[1.858s][info][gc] GC(18) Concurrent marking roots 2.800ms

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

Commit messages:
 - Backport 18e7d7b5e710b24e49b995777906a197e35795e6

Changes: https://git.openjdk.org/jdk23u/pull/9/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk23u&pr=9&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333716
  Stats: 8 lines in 1 file changed: 6 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk23u/pull/9.diff
  Fetch: git fetch https://git.openjdk.org/jdk23u.git pull/9/head:pull/9

PR: https://git.openjdk.org/jdk23u/pull/9