114 lines
3.9 KiB
Java
114 lines
3.9 KiB
Java
/*
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* Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 7194254
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* @summary Creates several threads with different java priorities and checks
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* whether jstack reports correct priorities for them.
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*
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* java.management
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* @comment Use othervm mode so that we don't capture unrelated threads created by other tests
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* @run main/othervm ThreadPriorities
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*/
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import java.util.ArrayList;
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import java.util.concurrent.CyclicBarrier;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.JDKToolFinder;
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import static jdk.test.lib.Asserts.*;
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public class ThreadPriorities {
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public static void main(String[] args) throws Throwable {
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final int NUMBER_OF_JAVA_PRIORITIES =
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Thread.MAX_PRIORITY - Thread.MIN_PRIORITY + 1;
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final CyclicBarrier barrier =
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new CyclicBarrier(NUMBER_OF_JAVA_PRIORITIES + 1);
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for (int p = Thread.MIN_PRIORITY; p <= Thread.MAX_PRIORITY; ++p) {
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final int priority = p;
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new Thread("Priority=" + p) {
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{
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setPriority(priority);
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}
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public void run() {
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try {
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barrier.await(); // 1st
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barrier.await(); // 2nd
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} catch (Exception exc) {
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// ignore
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}
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}
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}.start();
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}
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barrier.await(); // 1st
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int matches = 0;
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ArrayList<String> failed = new ArrayList<>();
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ProcessBuilder pb = new ProcessBuilder(
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JDKToolFinder.getJDKTool("jstack"),
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String.valueOf(ProcessTools.getProcessId()));
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String[] output = new OutputAnalyzer(pb.start()).getOutput().split("\\R");
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Pattern pattern = Pattern.compile(
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"\\\"Priority=(\\d+)\\\".* prio=(\\d+).*");
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for (String line : output) {
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Matcher matcher = pattern.matcher(line);
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if (matcher.matches()) {
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matches += 1;
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String expected = matcher.group(1);
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String actual = matcher.group(2);
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if (!expected.equals(actual)) {
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failed.add(line);
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}
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}
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}
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barrier.await(); // 2nd
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barrier.reset();
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boolean success = false;
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try {
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assertEquals(matches, NUMBER_OF_JAVA_PRIORITIES);
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assertTrue(failed.isEmpty(), failed.size() + ":" + failed);
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success = true;
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}
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finally {
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if (!success) {
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System.out.println("Failure detected - dumping jstack output:");
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for (String line : output) {
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System.out.println(line);
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}
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}
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}
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}
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}
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