RFR: 8337331: crash: pinned virtual thread will lead to jvm crash when running with the javaagent option [v11]

[Jiawei Tang]

> I add the testcase which can reproduce the crash. I hope that I could get some advise if the codes need changing.

Jiawei Tang has updated the pull request incrementally with one additional commit since the last revision:

  change the format of the testcase file

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/20373/files
  - new: https://git.openjdk.org/jdk/pull/20373/files/83e8aa01..e81db430

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20373&range=10
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20373&range=09-10

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/20373.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20373/head:pull/20373

PR: https://git.openjdk.org/jdk/pull/20373