/*

 * Copyright (c) 2015, 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.

 *

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 */

/*

 * @test

 * @summary Checks that jstack correctly prints the thread names

 * @library /test/lib/share/classes

 * @library ../share

 * @build common.*

 *

 * @run main/othervm -XX:+UsePerfData ThreadNamesTest

 */

import common.ToolResults;

import utils.*;

public class ThreadNamesTest {

    private static final String STRANGE_NAME = "-_?+!@#$%^*()";

    private static final String LONG_NAME = "loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong";

    static class NamedThread extends Thread {

        NamedThread(String name) {

            setName(name);

        }

        @Override

        public void run() {

            Utils.sleep();

        }

    }

    public static void main(String[] args) throws Exception {

        testWithName(STRANGE_NAME);

        testWithName("");

        testWithName(LONG_NAME);

    }

    private static void testWithName(String name) throws Exception {

        // Start a thread with some strange name

        NamedThread thread = new NamedThread(name);

        thread.start();

        // Run jstack tool and collect the output

        JstackTool jstackTool = new JstackTool(ProcessHandle.current().getPid());

        ToolResults results = jstackTool.measure();

        // Analyze the jstack output for the strange thread name

        JStack jstack1 = new DefaultFormat().parse(results.getStdoutString());

        ThreadStack ti1 = jstack1.getThreadStack(name);

        if (ti1 == null) {

            throw new RuntimeException("jstack output doesn't contain thread info for the thread '" + name + "'");

        }

    }

}