$ java -Djdk.tracePinnedThreads=full MonitorPinningDemo   (pre-JDK-24 runtime)

java.version=21.0.10
jdk.tracePinnedThreads=full
VirtualThread[#18]/runnable@ForkJoinPool-1-worker-1 reason:MONITOR
    java.base/java.lang.VirtualThread$VThreadContinuation.onPinned(VirtualThread.java:199)
    java.base/jdk.internal.vm.Continuation.onPinned0(Continuation.java:393)
    java.base/java.lang.VirtualThread.parkNanos(VirtualThread.java:635)
    java.base/java.lang.VirtualThread.sleepNanos(VirtualThread.java:807)
    java.base/java.lang.Thread.sleep(Thread.java:507)
    com.ankurm.vtpinning.MonitorPinningDemo.lambda$main$0(MonitorPinningDemo.java:27) <== monitors:1
    java.base/java.lang.VirtualThread.run(VirtualThread.java:329)
done

$ java -Djdk.tracePinnedThreads=full MonitorPinningDemo   (JDK 24+ runtime)

java.version=25.0.4.1
jdk.tracePinnedThreads=full
done