--- /dev/null 2015-11-09 19:49:54.000000000 +0300 +++ new/test/lib/testlibrary/jdk/testlibrary/management/ThreadMXBeanTool.java 2015-11-09 19:49:54.000000000 +0300 @@ -0,0 +1,77 @@ +/* + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package jdk.testlibrary.management; + +import java.lang.management.ManagementFactory; +import java.lang.management.ThreadInfo; +import java.lang.management.ThreadMXBean; +import java.util.concurrent.TimeoutException; + +/** + * Few utility methods to use ThreadMXBean. + */ +public final class ThreadMXBeanTool { + + /** + * Waits until {@link Thread} is in the certain {@link State} + * and blocking on {@code object}. + * + * @param state The thread state + * @param object The object to block on + */ + public static void waitUntilBlockingOnObject(Thread thread, Thread.State state, Object object) { + String want = object == null ? null : object.getClass().getName() + '@' + + Integer.toHexString(System.identityHashCode(object)); + ThreadMXBean tmx = ManagementFactory.getThreadMXBean(); + while (thread.isAlive()) { + ThreadInfo ti = tmx.getThreadInfo(thread.getId()); + if (ti.getThreadState() == state + && (want == null || want.equals(ti.getLockName()))) { + return; + } + try { + Thread.sleep(1); + } catch (InterruptedException e) { + } + } + } + + /** + * Waits until {@link Thread} is in native. + */ + public static void waitUntilInNative(Thread thread) { + ThreadMXBean tmx = ManagementFactory.getThreadMXBean(); + while (thread.isAlive()) { + ThreadInfo ti = tmx.getThreadInfo(thread.getId()); + if (ti.isInNative()) { + return; + } + try { + Thread.sleep(1); + } catch (InterruptedException e) { + } + } + } + +}