RFR: 8373118: Test java/lang/Thread/virtual/Starvation.java timed out [v27]

[Doug Lea]

> Changes signal filtering to avoid possible starvation

Doug Lea has updated the pull request incrementally with one additional commit since the last revision:

  Simplify scan mode control by moving and reworking topLevelExec and throwing on trim

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/28797/files
  - new: https://git.openjdk.org/jdk/pull/28797/files/88f1466d..a1e5ce94

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28797&range=26
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28797&range=25-26

  Stats: 192 lines in 1 file changed: 57 ins; 60 del; 75 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