[jdk17u-dev] RFR: 8334394: Race condition in Class::protectionDomain

[Goetz Lindenmaier]

I backport this for parity with 17.0.17-oracle.

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

Commit messages:
 - Backport c3226aaeb810521257e961be5763552c86ee5651

Changes: https://git.openjdk.org/jdk17u-dev/pull/3641/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3641&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334394
  Stats: 109 lines in 2 files changed: 92 ins; 10 del; 7 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3641.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3641/head:pull/3641

PR: https://git.openjdk.org/jdk17u-dev/pull/3641