RFR: JDK-8310584: GetThreadState reports blocked and runnable for pinned suspended virtual threads [v2]

[Alex Menkov]

> The change fixes handling of "suspended" bit in VT state.
> The code looks very strange.
> java_lang_VirtualThread::RUNNING == 3, so line 803 clears JVMTI_THREAD_STATE_ALIVE(1) and JVMTI_THREAD_STATE_TERMINATED(2)
> Per log this code came from loom repo with VT integration.
> 
> Testing: tier1-4, updated GetThreadStateMountedTest.java

Alex Menkov has updated the pull request incrementally with one additional commit since the last revision:

  check that VT is alive before applying suspend/interrupt bits

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/14878/files
  - new: https://git.openjdk.org/jdk/pull/14878/files/e2cf7c3c..084e9707

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14878&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14878&range=00-01

  Stats: 8 lines in 1 file changed: 3 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/14878.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14878/head:pull/14878

PR: https://git.openjdk.org/jdk/pull/14878