[jdk21u-dev] RFR: 8320310: CompiledMethod::has_monitors flag can be incorrect

Fri May 2 21:29:25 UTC 2025

Backporting JDK-8320310: CompiledMethod::has_monitors flag can be incorrect. The proposed fix is to rely on Method::has_monitor_bytecodes to set the has_monitors flag when compiling, which is immune to issues where not all byte codes of a method are parsed during compilation. Adds test. Ran GHA Sanity Checks, local Tier 1 and 2 tests. Patch is clean.

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Commit messages:
 - Backport c8fa3e21e6a4fd7846932b545a1748cc1dc6d9f1

Changes: https://git.openjdk.org/jdk21u-dev/pull/1732/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1732&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8320310
  Stats: 30 lines in 4 files changed: 8 ins; 17 del; 5 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1732.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1732/head:pull/1732

PR: https://git.openjdk.org/jdk21u-dev/pull/1732