RFR: 8291302: ARM32: nmethod entry barriers support

Wed Nov 30 20:36:18 UTC 2022

This PR implements nmethod entry barriers for ARM32. It has already been implemented for other ports and is related with JDK-8290025 "Remove the Sweeper".

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Commit messages:
 - 8291302: ARM32: nmethod entry barriers support

Changes: https://git.openjdk.org/jdk/pull/11442/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11442&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8291302
  Stats: 250 lines in 11 files changed: 245 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/11442.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11442/head:pull/11442

PR: https://git.openjdk.org/jdk/pull/11442