[jdk20u] RFR: 8307104: [AIX] VM crashes with UseRTMLocking on Power10

Thu May 11 18:15:01 UTC 2023

Prevent crashes on platforms that don't support transnational memory instructions.

I encountered conflicts with the header file years while making this change. No conflicts with functionality. Essentially a clean backport, but I will wait for a review before proceeding.

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Commit messages:
 - 8307104: [AIX] VM crashes with UseRTMLocking on Power10

Changes: https://git.openjdk.org/jdk20u/pull/77/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk20u&pr=77&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8307104
  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk20u/pull/77.diff
  Fetch: git fetch https://git.openjdk.org/jdk20u.git pull/77/head:pull/77

PR: https://git.openjdk.org/jdk20u/pull/77