RFR: 8244289: fatal error: Possible safepoint reached by thread that does not allow it

[Markus Grönlund]

Greetings,

Please help review this correction to an invalid lock acquisition when JFR is configured for not writing to disk.

Problem analysis is in the JIRA issue.

Testing: jdk_jfr, microbenchmarks

Thanks
Markus

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Commit messages:
 - 8244289

Changes: https://git.openjdk.org/jdk/pull/14828/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14828&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8244289
  Stats: 14 lines in 3 files changed: 2 ins; 3 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/14828.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14828/head:pull/14828

PR: https://git.openjdk.org/jdk/pull/14828