[JDK-8295376](https://bugs.openjdk.org/browse/JDK-8295376) introduced some new code that disables JVMTI VIRTUAL_THREAD_START/END events when the debugger disconnects. Sometimes this disabling attempt results in a JVMTI_ERROR_WRONG_PHASE. The reason is because often the disconnect and debuggee exit are happening at the same time. By the time the disable is attempted, the VM has already sent (and the debug agent processed) the VM_DEATH event, so the VM is now in JVMTI_PHASE_DEAD.
To fix this I took the direct approach of just allowing JVMTI_ERROR_WRONG_PHASE if VM_DEATH has been sent already. I could have tried something more elegant that would have synchronized on the vmDeathLock, and avoided the disabling call completely, but I didn't think the risk of a deadlock was worth it, so I kept it simple. ------------- Commit messages: - Allow PHASE_ERROR when disabling vthread events Changes: https://git.openjdk.org/jdk/pull/11307/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11307&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8297170 Stats: 14 lines in 1 file changed: 11 ins; 0 del; 3 mod Patch: https://git.openjdk.org/jdk/pull/11307.diff Fetch: git fetch https://git.openjdk.org/jdk pull/11307/head:pull/11307 PR: https://git.openjdk.org/jdk/pull/11307
