[jdk21u-dev] RFR: 8326521: JFR: CompilerPhase event test fails on windows 32 bit

[Robert Toyonaga]

This is a backport of https://github.com/openjdk/jdk/commit/96530bcc07514c3eda40fd6ffa74f197fe541dea

On some systems (such as windows 32 bit) Hotspot only uses the C1 compiler in by design. The CompilerPhase JFR events are only emitted from C2 code. So the test TestCompilerPhase fails on some systems because it cannot generate the necessary CompilerPhase JFR events .

This backport prevents NeverActAsServerClassMachine from being set during the test TestCompilerPhase, so that it isn't restricted to C1. It should help resolve some test failures for Adoptium (see https://github.com/adoptium/aqa-tests/issues/3045).

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Commit messages:
 - Backport 96530bcc07514c3eda40fd6ffa74f197fe541dea

Changes: https://git.openjdk.org/jdk21u-dev/pull/499/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=499&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8326521
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/499.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/499/head:pull/499

PR: https://git.openjdk.org/jdk21u-dev/pull/499