[jdk11u-dev] RFR: 8314950: CMS may miss NMT tag after mark stack expansion

[Zhengyu Gu]

Please review this small fix that tags new mark stack after expansion.

Thanks @MBaesken for reporting this bug.

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

Commit messages:
 - 8314950: CMS may miss NMT tag after mark stack expansion

Changes: https://git.openjdk.org/jdk11u-dev/pull/2097/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2097&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314950
  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2097.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2097/head:pull/2097

PR: https://git.openjdk.org/jdk11u-dev/pull/2097