RFR: 8295223 JFR: At most one native periodic event thread at a time

[Erik Gahlin]

Hi,

Could I have a review of PR that ensures only one Java thread calls into native to emit periodic events at a time.

Testing: tier1-tier3, test/jdk/jdk/jfr

Thanks
Erik

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Commit messages:
 - Remove accidentally added file
 - Initial

Changes: https://git.openjdk.org/jdk/pull/10676/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10676&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295223
  Stats: 21 lines in 2 files changed: 18 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/10676.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10676/head:pull/10676

PR: https://git.openjdk.org/jdk/pull/10676