[jdk17u-dev] RFR: 8288497: add support for JavaThread::is_oop_safe() [v2]

[Aleksey Shipilev]

> Clean backport on the way to fix [JDK-8288139](https://bugs.openjdk.org/browse/JDK-8288139). Requires follow-ups as dependent PRs.
> 
> Additional testing:
>  - [ ] Linux x86_64 fastdebug `tier1` (as part of whole batch of PRs)
>  - [ ] Linux x86_64 fastdebug `tier2` (as part of whole batch of PRs)
>  - [ ] Linux x86_64 fastdebug `tier3` (as part of whole batch of PRs)

Aleksey Shipilev 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 one additional commit since the last revision:

  Backport e26d3b3c01a06f250344d0afdaa9fadd1fdae33b

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

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/1514/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/1514/files/842963d5..b84ae048

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1514&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1514&range=00-01

  Stats: 146 lines in 5 files changed: 130 ins; 4 del; 12 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1514.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1514/head:pull/1514

PR: https://git.openjdk.org/jdk17u-dev/pull/1514