Thread deadlock analysis

"waiting for monitor entry [0x00007f0e2bbfa000]" the hexadecimal address does not correspond directly with lock addresses.

Test code:

public class ThreadMonitorTest implements Runnable
{
  ThreadMonitorTest b;

  public static void main(String[] args)
  {
    ThreadMonitorTest a = new ThreadMonitorTest();
    a.b = new ThreadMonitorTest();
    a.b.b = a;
 
    new Thread(a).start();
    new Thread(a.b).start();
  }

  public void run()
  {
    synchronized(this) {
      try
      {
        this.wait(60000);
        synchronized (b)
        {
          b.wait(60000);
        }
      }
      catch (InterruptedException e)
      {
        e.printStackTrace();
      }
    }
  }
}

Stacktraces taken while the above test program was executing.
---------------------------------------------------------------------------------
Immediately after starting, timed waiting.

Thread-1" prio=10 tid=0x00007f0e48114000 nid=0x256e in Object.wait() [0x00007f0e2bbfa000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007d704d288> (a ThreadMonitorTest)
at ThreadMonitorTest.run(ThreadMonitorTest.java:20)
- locked <0x00000007d704d288> (a ThreadMonitorTest)
at java.lang.Thread.run(Thread.java:722)

"Thread-0" prio=10 tid=0x00007f0e48112000 nid=0x256d in Object.wait() [0x00007f0e2bcfb000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007d704d278> (a ThreadMonitorTest)
at ThreadMonitorTest.run(ThreadMonitorTest.java:20)
- locked <0x00000007d704d278> (a ThreadMonitorTest)
at java.lang.Thread.run(Thread.java:722)

---------------------------------------------------------------------------------
After 1 minute, still time waiting.
Event though the below is a deadlock, the JVM doesn't flag it until the timed wait expires.

"Thread-1" prio=10 tid=0x00007f0e48114000 nid=0x256e waiting for monitor entry [0x00007f0e2bbfa000]
   java.lang.Thread.State: BLOCKED (on object monitor)
at ThreadMonitorTest.run(ThreadMonitorTest.java:23)
- waiting to lock <0x00000007d704d278> (a ThreadMonitorTest)
- locked <0x00000007d704d288> (a ThreadMonitorTest)
at java.lang.Thread.run(Thread.java:722)

"Thread-0" prio=10 tid=0x00007f0e48112000 nid=0x256d in Object.wait() [0x00007f0e2bcfb000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007d704d288> (a ThreadMonitorTest)
at ThreadMonitorTest.run(ThreadMonitorTest.java:23)
- locked <0x00000007d704d288> (a ThreadMonitorTest)
- locked <0x00000007d704d278> (a ThreadMonitorTest)
at java.lang.Thread.run(Thread.java:722)

---------------------------------------------------------------------------------
After two minutes and all timed waits have expired.

"Thread-1" prio=10 tid=0x00007f0e48114000 nid=0x256e waiting for monitor entry [0x00007f0e2bbfa000]
   java.lang.Thread.State: BLOCKED (on object monitor)
at ThreadMonitorTest.run(ThreadMonitorTest.java:23)
- waiting to lock <0x00000007d704d278> (a ThreadMonitorTest)
- locked <0x00000007d704d288> (a ThreadMonitorTest)
at java.lang.Thread.run(Thread.java:722)

"Thread-0" prio=10 tid=0x00007f0e48112000 nid=0x256d waiting for monitor entry [0x00007f0e2bcfb000]
   java.lang.Thread.State: BLOCKED (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007d704d288> (a ThreadMonitorTest)
at ThreadMonitorTest.run(ThreadMonitorTest.java:23)
- locked <0x00000007d704d288> (a ThreadMonitorTest)
- locked <0x00000007d704d278> (a ThreadMonitorTest)
at java.lang.Thread.run(Thread.java:722)


Found one Java-level deadlock:
=============================
"Thread-1":
  waiting to lock monitor 0x00007f0e08005ed0 (object 0x00000007d704d278, a ThreadMonitorTest),
  which is held by "Thread-0"
"Thread-0":
  waiting to lock monitor 0x00007f0e08003620 (object 0x00000007d704d288, a ThreadMonitorTest),
  which is held by "Thread-1"

Java stack information for the threads listed above:
===================================================
"Thread-1":
at ThreadMonitorTest.run(ThreadMonitorTest.java:23)
- waiting to lock <0x00000007d704d278> (a ThreadMonitorTest)
- locked <0x00000007d704d288> (a ThreadMonitorTest)
at java.lang.Thread.run(Thread.java:722)
"Thread-0":
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007d704d288> (a ThreadMonitorTest)
at ThreadMonitorTest.run(ThreadMonitorTest.java:23)
- locked <0x00000007d704d288> (a ThreadMonitorTest)
- locked <0x00000007d704d278> (a ThreadMonitorTest)
at java.lang.Thread.run(Thread.java:722)

Found 1 deadlock.