RFR: 8312293: SIGSEGV in jfr.internal.event.EventWriter.putUncheckedByte after JDK-8312086

[Markus Grönlund]

Greetings,

please help review this fix. The problem description and fix are described in detail in the JIRA issue.

Testing: jdk_jfr, microbenchmarks

Thanks
Markus

-------------

Commit messages:
 - 8312293

Changes: https://git.openjdk.org/jdk/pull/14962/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14962&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8312293
  Stats: 3 lines in 2 files changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/14962.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14962/head:pull/14962

PR: https://git.openjdk.org/jdk/pull/14962