RFR: 8337331: crash: pinned virtual thread will lead to jvm crash when running with the javaagent option [v8]

[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/80b139ef..f15cbea4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20373&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20373&range=06-07

  Stats: 14 lines in 1 file changed: 6 ins; 5 del; 3 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