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/*
 * @test
 *
 * @summary converted from VM Testbase nsk/monitoring/ThreadInfo/getLockName/getlockname001.
 * VM Testbase keywords: [quick, monitoring]
 * VM Testbase readme:
 * DESCRIPTION
 *     The test checks that
 *         ThreadInfo.getLockName()
 *     returns correct string for a blocked thread and for a running thread.
 *     The test starts an instance of MyThread, waits to be sure that it is blocked
 *     on "backDoor" object and then calls getLockName() for it. Since the thread
 *     is blocked, the expected string is:
 *         backDoor.getClass().getName() + "<at>"
 *         + Integer.toHexString(System.identityHashCode(backDoor))
 *     After that current thread is checked. Since it is not blocked on any object,
 *     getLockName() must return null.
 *     Testing of the method does not depend on the way to access metrics, so
 *     only one (direct access) is implemented in the test.
 * COMMENT
 *     Fixed the bug
 *     4989235 TEST: The spec is updated accoring to 4982289, 4985742
 *     Updated according to:
 *     5024531 Fix MBeans design flaw that restricts to use JMX CompositeData
 *
 * @library /vmTestbase
 *          /test/lib
 * @run driver jdk.test.lib.FileInstaller . .
 * @run main/othervm nsk.monitoring.ThreadInfo.getLockName.getlockname001
 */