[jdk21u-dev] RFR: 8359472: JVM crashes when attaching a dynamic agent before JVMTI_PHASE_LIVE

[Francesco Andreuzzi]

8359472: JVM crashes when attaching a dynamic agent before JVMTI_PHASE_LIVE

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Commit messages:
 - Backport 2a8cbd944ba4d8896e48181e396c65f70e5aa215

Changes: https://git.openjdk.org/jdk21u-dev/pull/2489/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2489&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8359472
  Stats: 167 lines in 3 files changed: 167 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2489.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2489/head:pull/2489

PR: https://git.openjdk.org/jdk21u-dev/pull/2489