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test/runtime/7194254/Test7194254.java@6cbff0651f1a (annotated)

test/runtime/7194254/Test7194254.java

Mon, 06 Nov 2017 16:51:47 +0800

author

aoqi

date

Mon, 06 Nov 2017 16:51:47 +0800

changeset 7997

6cbff0651f1a

parent 6876

710a3c8b516e

permissions

-rw-r--r--

[Code Reorganization] remove trailing whitespace to pass jcheck test

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*/
aoqi@0	23
aoqi@0	24	/*
aoqi@0	25	* @test
aoqi@0	26	* @bug 7194254
aoqi@0	27	* @summary Creates several threads with different java priorities and checks
aoqi@0	28	* whether jstack reports correct priorities for them.
aoqi@0	29	*
aoqi@0	30	* @run main Test7194254
aoqi@0	31	*/
aoqi@0	32
aoqi@0	33	import java.io.BufferedReader;
aoqi@0	34	import java.io.InputStreamReader;
aoqi@0	35	import java.lang.management.ManagementFactory;
aoqi@0	36	import java.lang.management.RuntimeMXBean;
aoqi@0	37	import java.util.ArrayList;
aoqi@0	38	import java.util.List;
aoqi@0	39	import java.util.concurrent.CyclicBarrier;
aoqi@0	40	import java.util.regex.Matcher;
aoqi@0	41	import java.util.regex.Pattern;
aoqi@0	42
aoqi@0	43	public class Test7194254 {
aoqi@0	44
aoqi@0	45	public static void main(String[] args) throws Exception {
aoqi@0	46	final int NUMBER_OF_JAVA_PRIORITIES =
aoqi@0	47	Thread.MAX_PRIORITY - Thread.MIN_PRIORITY + 1;
aoqi@0	48	final CyclicBarrier barrier =
aoqi@0	49	new CyclicBarrier(NUMBER_OF_JAVA_PRIORITIES + 1);
aoqi@0	50
aoqi@0	51	for (int p = Thread.MIN_PRIORITY; p <= Thread.MAX_PRIORITY; ++p) {
aoqi@0	52	final int priority = p;
aoqi@0	53	new Thread("Priority=" + p) {
aoqi@0	54	{
aoqi@0	55	setPriority(priority);
aoqi@0	56	}
aoqi@0	57	public void run() {
aoqi@0	58	try {
aoqi@0	59	barrier.await(); // 1st
aoqi@0	60	barrier.await(); // 2nd
aoqi@0	61	} catch (Exception exc) {
aoqi@0	62	// ignore
aoqi@0	63	}
aoqi@0	64	}
aoqi@0	65	}.start();
aoqi@0	66	}
aoqi@0	67	barrier.await(); // 1st
aoqi@0	68
aoqi@0	69	int matches = 0;
aoqi@0	70	List<String> failed = new ArrayList<>();
aoqi@0	71	try {
aoqi@0	72	String pid = getPid();
aoqi@0	73	String jstack = System.getProperty("java.home") + "/../bin/jstack";
aoqi@0	74	Process process = new ProcessBuilder(jstack, pid)
aoqi@0	75	.redirectErrorStream(true).start();
aoqi@0	76	Pattern pattern = Pattern.compile(
aoqi@0	77	"\\\"Priority=(\\d+)\\\".* prio=(\\d+).*");
aoqi@0	78	try (BufferedReader reader = new BufferedReader(
aoqi@0	79	new InputStreamReader(process.getInputStream()))) {
aoqi@0	80	String line;
aoqi@0	81	while((line = reader.readLine()) != null) {
aoqi@0	82	Matcher matcher = pattern.matcher(line);
aoqi@0	83	if (matcher.matches()) {
aoqi@0	84	matches += 1;
aoqi@0	85	String expected = matcher.group(1);
aoqi@0	86	String actual = matcher.group(2);
aoqi@0	87	if (!expected.equals(actual)) {
aoqi@0	88	failed.add(line);
aoqi@0	89	}
aoqi@0	90	}
aoqi@0	91	}
aoqi@0	92	}
aoqi@0	93	barrier.await(); // 2nd
aoqi@0	94	} finally {
aoqi@0	95	barrier.reset();
aoqi@0	96	}
aoqi@0	97
aoqi@0	98	if (matches != NUMBER_OF_JAVA_PRIORITIES) {
aoqi@0	99	throw new AssertionError("matches: expected " +
aoqi@0	100	NUMBER_OF_JAVA_PRIORITIES + ", but was " + matches);
aoqi@0	101	}
aoqi@0	102	if (!failed.isEmpty()) {
aoqi@0	103	throw new AssertionError(failed.size() + ":" + failed);
aoqi@0	104	}
aoqi@0	105	System.out.println("Test passes.");
aoqi@0	106	}
aoqi@0	107
aoqi@0	108	static String getPid() {
aoqi@0	109	RuntimeMXBean runtimebean = ManagementFactory.getRuntimeMXBean();
aoqi@0	110	String vmname = runtimebean.getName();
aoqi@0	111	int i = vmname.indexOf('@');
aoqi@0	112	if (i != -1) {
aoqi@0	113	vmname = vmname.substring(0, i);
aoqi@0	114	}
aoqi@0	115	return vmname;
aoqi@0	116	}
aoqi@0	117
aoqi@0	118	}
aoqi@0	119