RFR: 8307153: JVMTI GetThreadState on carrier should return STATE_WAITING

Serguei Spitsyn sspitsyn at openjdk.org
Sat Jun 3 11:25:23 UTC 2023


When a virtual thread is mounted, the carrier thread should be reported as "waiting" until the virtual thread unmounts. Right now, GetThreadState reports a state based the JavaThread status when it should return JVMTI_THREAD_STATE_WAITING | JVMTI_THREAD_STATE_WAITING_INDEFINITELY.
The fix adds:
 - a special case for passive carrier threads
 - necessary test coverage to the existing JVMTI test: `serviceability/jvmti/vthread/ThreadStateTest`.

Testing:
   - tested with the updated test: `serviceability/jvmti/vthread/ThreadStateTest`
   - submitted mach5 tiers 1-5
   - TBD: to submit mach5 tier 6

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

Commit messages:
 - minor tweaks in libThreadStateTest.cpp
 - 8307153: JVMTI GetThreadState on carrier should return STATE_WAITING

Changes: https://git.openjdk.org/jdk/pull/14298/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14298&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8307153
  Stats: 71 lines in 4 files changed: 61 ins; 0 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/14298.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14298/head:pull/14298

PR: https://git.openjdk.org/jdk/pull/14298


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