[jdk25u-dev] RFR: 8369991: Thread blocking during JFR emergency dump must be in safepoint safe state [v2]

[Goetz Lindenmaier]

> I backport this for parity with 25.0.3-oracle.
> 
> I had to resolve the code because "https://bugs.openjdk.org/browse/JDK-8367014: Rename class Atomic to AtomicAccess" is not in 25. Only context differences. Maybe clean anyways.

Goetz Lindenmaier 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 three additional commits since the last revision:

 - Merge branch 'master' into goetz_backport_8369991
 - backport afba636869bc297d0c9c29fbe7f2a1eb5929218b
 - backport 62fa971f3116828398294c9d57650c4e0aca7379

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

Changes:
  - all: https://git.openjdk.org/jdk25u-dev/pull/186/files
  - new: https://git.openjdk.org/jdk25u-dev/pull/186/files/914ee127..9c4b6f67

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk25u-dev&pr=186&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk25u-dev&pr=186&range=00-01

  Stats: 951 lines in 75 files changed: 426 ins; 311 del; 214 mod
  Patch: https://git.openjdk.org/jdk25u-dev/pull/186.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u-dev.git pull/186/head:pull/186

PR: https://git.openjdk.org/jdk25u-dev/pull/186