0N/A/*
2362N/A * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
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0N/A */
0N/A
0N/A/*
0N/A * @test
0N/A * @bug 5047639
0N/A * @summary Check that the "java-level" APIs provide a consistent view of
0N/A * the thread list
0N/A */
0N/Aimport java.lang.management.ManagementFactory;
0N/Aimport java.lang.management.ThreadMXBean;
0N/Aimport java.util.Map;
0N/A
0N/Apublic class ThreadLists {
0N/A public static void main(String args[]) {
0N/A
0N/A // get top-level thread group
0N/A ThreadGroup top = Thread.currentThread().getThreadGroup();
0N/A ThreadGroup parent;
0N/A do {
0N/A parent = top.getParent();
0N/A if (parent != null) top = parent;
0N/A } while (parent != null);
0N/A
0N/A // get the thread count
0N/A int activeCount = top.activeCount();
0N/A
0N/A Map<Thread, StackTraceElement[]> stackTraces = Thread.getAllStackTraces();
0N/A
0N/A ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
0N/A int threadCount = threadBean.getThreadCount();
0N/A long[] threadIds = threadBean.getAllThreadIds();
0N/A
0N/A System.out.println("ThreadGroup: " + activeCount + " active thread(s)");
0N/A System.out.println("Thread: " + stackTraces.size() + " stack trace(s) returned");
0N/A System.out.println("ThreadMXBean: " + threadCount + " live threads(s)");
0N/A System.out.println("ThreadMXBean: " + threadIds.length + " thread Id(s)");
0N/A
0N/A // check results are consistent
0N/A boolean failed = false;
0N/A if (activeCount != stackTraces.size()) failed = true;
0N/A if (activeCount != threadCount) failed = true;
0N/A if (activeCount != threadIds.length) failed = true;
0N/A
0N/A if (failed) {
0N/A throw new RuntimeException("inconsistent results");
0N/A }
0N/A }
0N/A}