RFR: 8373118: Test java/lang/Thread/virtual/Starvation.java timed out [v20]

[Doug Lea]

> Changes signal filtering to avoid possible starvation

Doug Lea has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 28 additional commits since the last revision:

 - Merge branch 'openjdk:master' into JDK-8373118
 - Split external push
 - Undo/redo ordering changes
 - Strengthen some orderings
 - Merge branch 'openjdk:master' into JDK-8373118
 - Not sure why this merge is necessary
   Merge remote-tracking branch 'refs/remotes/origin/JDK-8373118' into JDK-8373118
 - Merge branch 'openjdk:master' into JDK-8373118
 - Fix deactivate; faster quiescence
 - recheck avoiding cross-class offsets
 - Merge branch 'openjdk:master' into JDK-8373118
 - ... and 18 more: https://git.openjdk.org/jdk/compare/c03fedf9...54a8672a

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/28797/files
  - new: https://git.openjdk.org/jdk/pull/28797/files/2a580747..54a8672a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28797&range=19
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28797&range=18-19

  Stats: 16606 lines in 472 files changed: 3328 ins; 1877 del; 11401 mod
  Patch: https://git.openjdk.org/jdk/pull/28797.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28797/head:pull/28797

PR: https://git.openjdk.org/jdk/pull/28797