[jdk17u-dev] RFR: 8273108: RunThese24H crashes with SEGV in markWord::displaced_mark_helper() after JDK-8268276

[Scott Gibbons]

Clean PR for #864

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

Commit messages:
 - Backport 9a1bbaf8db0e869ab76be8ab1bd0ddeb23693e7e

Changes: https://git.openjdk.org/jdk17u-dev/pull/870/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=870&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8273108
  Stats: 12 lines in 2 files changed: 7 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/870.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/870/head:pull/870

PR: https://git.openjdk.org/jdk17u-dev/pull/870