Name: tb29552 Date: 05/02/2001


The "lock" command throws UnsupportedOperationException when the
debugee VM does not implement support for dumping monitor information
for an object.

Compare the output generated by "lock":
    main[2] locals
    Method arguments:
      args = instance of java.lang.String[0] (id=243)
    Local variables:
      my = instance of JDBStackFrameBug(id=244)
      localVar = "Hello"

    main[2] lock my
    Monitor information for instance of JDBStackFrameBug(id=244):
    java.lang.UnsupportedOperationException
            at
com.sun.tools.jdi.JDWPException.toJDIException(JDWPException.java:41)
            at
com.sun.tools.jdi.ObjectReferenceImpl.jdwpMonitorInfo(ObjectReferenceImpl.java:483)
            at
com.sun.tools.jdi.ObjectReferenceImpl.owningThread(ObjectReferenceImpl.java:494)
            at
com.sun.tools.example.debug.tty.Commands.doLock(Commands.java:1483)
            at
com.sun.tools.example.debug.tty.Commands$5.action(Commands.java:1510)
            at com.sun.tools.example.debug.tty.Commands$1.run(Commands.java:65)


To the output when I do a "threadlocks":

  main[2] threadlocks
  Monitor information for thread main:
  Command 'threadlocks' is not supported on the target VM

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