$ java -version
openjdk version "21.0.10" 2026-01-20
OpenJDK Runtime Environment (build 21.0.10+7-Ubuntu-124.04)
OpenJDK 64-Bit Server VM (build 21.0.10+7-Ubuntu-124.04, mixed mode, sharing)

$ java -Djdk.tracePinnedThreads=full com.ankurm.locks.VirtualThreadPinningDemo
VirtualThread[#18]/runnable@ForkJoinPool-1-worker-1 reason:MONITOR
    java.base/java.lang.VirtualThread$VThreadContinuation.onPinned(VirtualThread.java:199)
    java.base/jdk.internal.vm.Continuation.onPinned0(Continuation.java:393)
    java.base/java.lang.VirtualThread.parkNanos(VirtualThread.java:635)
    java.base/java.lang.VirtualThread.sleepNanos(VirtualThread.java:807)
    java.base/java.lang.Thread.sleep(Thread.java:507)
    com.ankurm.locks.VirtualThreadPinningDemo.lambda$main$0(VirtualThreadPinningDemo.java:25) <== monitors:1
    java.base/java.lang.VirtualThread.run(VirtualThread.java:329)
Virtual thread finished. (No output above this line means it did not pin.)