| /* |
| * Copyright (c) 2012, 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. |
| */ |
| |
| /* |
| * @test |
| * @bug 7194254 |
| * @summary Creates several threads with different java priorities and checks |
| * whether jstack reports correct priorities for them. |
| * |
| * @run main Test7194254 |
| */ |
| |
| import java.io.BufferedReader; |
| import java.io.InputStreamReader; |
| import java.lang.management.ManagementFactory; |
| import java.lang.management.RuntimeMXBean; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.CyclicBarrier; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| public class Test7194254 { |
| |
| public static void main(String[] args) throws Exception { |
| final int NUMBER_OF_JAVA_PRIORITIES = |
| Thread.MAX_PRIORITY - Thread.MIN_PRIORITY + 1; |
| final CyclicBarrier barrier = |
| new CyclicBarrier(NUMBER_OF_JAVA_PRIORITIES + 1); |
| |
| for (int p = Thread.MIN_PRIORITY; p <= Thread.MAX_PRIORITY; ++p) { |
| final int priority = p; |
| new Thread("Priority=" + p) { |
| { |
| setPriority(priority); |
| } |
| public void run() { |
| try { |
| barrier.await(); // 1st |
| barrier.await(); // 2nd |
| } catch (Exception exc) { |
| // ignore |
| } |
| } |
| }.start(); |
| } |
| barrier.await(); // 1st |
| |
| int matches = 0; |
| List<String> failed = new ArrayList<>(); |
| try { |
| String pid = getPid(); |
| String jstack = System.getProperty("java.home") + "/../bin/jstack"; |
| Process process = new ProcessBuilder(jstack, pid) |
| .redirectErrorStream(true).start(); |
| Pattern pattern = Pattern.compile( |
| "\\\"Priority=(\\d+)\\\".* prio=(\\d+).*"); |
| try (BufferedReader reader = new BufferedReader( |
| new InputStreamReader(process.getInputStream()))) { |
| String line; |
| while((line = reader.readLine()) != null) { |
| Matcher matcher = pattern.matcher(line); |
| if (matcher.matches()) { |
| matches += 1; |
| String expected = matcher.group(1); |
| String actual = matcher.group(2); |
| if (!expected.equals(actual)) { |
| failed.add(line); |
| } |
| } |
| } |
| } |
| barrier.await(); // 2nd |
| } finally { |
| barrier.reset(); |
| } |
| |
| if (matches != NUMBER_OF_JAVA_PRIORITIES) { |
| throw new AssertionError("matches: expected " + |
| NUMBER_OF_JAVA_PRIORITIES + ", but was " + matches); |
| } |
| if (!failed.isEmpty()) { |
| throw new AssertionError(failed.size() + ":" + failed); |
| } |
| System.out.println("Test passes."); |
| } |
| |
| static String getPid() { |
| RuntimeMXBean runtimebean = ManagementFactory.getRuntimeMXBean(); |
| String vmname = runtimebean.getName(); |
| int i = vmname.indexOf('@'); |
| if (i != -1) { |
| vmname = vmname.substring(0, i); |
| } |
| return vmname; |
| } |
| |
| } |
| |