[jdk25u] RFR: 8359472: JVM crashes when attaching a dynamic agent before JVMTI_PHASE_LIVE [v2]

[Francesco Andreuzzi]

> Hi all,
> 
> This pull request contains a backport of commit [2a8cbd94](https://github.com/openjdk/jdk/commit/2a8cbd944ba4d8896e48181e396c65f70e5aa215) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Francesco Andreuzzi on 22 Oct 2025 and was reviewed by Leonid Mesnik, Serguei Spitsyn and Alex Menkov.
> 
> Thanks!

Francesco Andreuzzi has updated the pull request incrementally with one additional commit since the last revision:

  Backport b166b0d0826435c7965f3f11e8f3cec1392e1e01

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

Changes:
  - all: https://git.openjdk.org/jdk25u/pull/340/files
  - new: https://git.openjdk.org/jdk25u/pull/340/files/86920580..0803fc4d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk25u&pr=340&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk25u&pr=340&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk25u/pull/340.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u.git pull/340/head:pull/340

PR: https://git.openjdk.org/jdk25u/pull/340