| /* |
| * Copyright (c) 2015, 2017, 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.test.lib.management; |
| |
| import java.lang.management.ManagementFactory; |
| import java.lang.management.ThreadInfo; |
| import java.lang.management.ThreadMXBean; |
| |
| /** |
| * A few utility methods to use ThreadMXBean. |
| */ |
| public final class ThreadMXBeanTool { |
| |
| /** |
| * Waits until {@link Thread} is in the certain {@link Thread.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) |
| throws InterruptedException { |
| 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; |
| } |
| Thread.sleep(1); |
| } |
| } |
| |
| /** |
| * Waits until {@link Thread} is in native. |
| */ |
| public static void waitUntilInNative(Thread thread) throws InterruptedException { |
| ThreadMXBean tmx = ManagementFactory.getThreadMXBean(); |
| while (thread.isAlive()) { |
| ThreadInfo ti = tmx.getThreadInfo(thread.getId()); |
| if (ti.isInNative()) { |
| return; |
| } |
| Thread.sleep(1); |
| } |
| } |
| |
| } |