RFR: 8303134: JFR: Missing stack trace during chunk rotation stress [v6]

[Markus Grönlund]

> Greetings,
> 
> please help review this fix for some problematic situations in JFR where data can be lost. Most problems originate from writing event data in the wrong epoch due to safepointing. Detailed information about the changes is in the JIRA issue.
> 
> Testing: jdk_jfr, stress testing.
> 
> Thanks
> Markus

Markus Grönlund has updated the pull request incrementally with one additional commit since the last revision:

  debug aid removals

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/14761/files
  - new: https://git.openjdk.org/jdk/pull/14761/files/635d05e8..be1d0da1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14761&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14761&range=04-05

  Stats: 2 lines in 2 files changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/14761.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14761/head:pull/14761

PR: https://git.openjdk.org/jdk/pull/14761