[jdk17u-dev] RFR: 8305403: Shenandoah evacuation workers may deadlock [v2]

[William Kemper]

> This is a backport of https://github.com/openjdk/jdk/pull/13309. It was not clean, but the conflict was trivial to resolve.

William Kemper 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 two additional commits since the last revision:

 - Merge branch 'jdk17u-dev:master' into JDK-8305403-Backport
 - Backport 793da60ee833d09db0f6f14b50a7cbd7f4549e3b

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

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/1242/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/1242/files/3ddd446c..a7b3a0be

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1242&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1242&range=00-01

  Stats: 1266 lines in 46 files changed: 941 ins; 138 del; 187 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1242.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1242/head:pull/1242

PR: https://git.openjdk.org/jdk17u-dev/pull/1242