test/compiler/c2/Test6857159.java

/*
 * Copyright (c) 2009, 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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 * questions.
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/**
 * @test
 * @bug 6857159
 * @summary local schedule failed with checkcast of Thread.currentThread()
 * @library /testlibrary
 * @modules java.base/jdk.internal.misc
 *          java.management
 *
 * @run driver compiler.c2.Test6857159
 */

package compiler.c2;

import jdk.test.lib.OutputAnalyzer;
import jdk.test.lib.ProcessTools;

public class Test6857159 {
    public static void main(String[] args) throws Throwable {
        String className = Test.class.getName();
        OutputAnalyzer analyzer = ProcessTools.executeTestJvm("-Xbatch",
                "-XX:+PrintCompilation",
                "-XX:CompileOnly="+ className + "$ct::run",
                className);
        analyzer.shouldNotContain("COMPILE SKIPPED");
        analyzer.shouldContain(className + "$ct0::run (16 bytes)");
        analyzer.shouldHaveExitValue(0);
    }

    static class Test extends Thread {
        static class ct0 extends Test {
            public void message() {
            }

            public void run() {
                message();
                ct0 ct = (ct0) Thread.currentThread();
                ct.message();
            }
        }

        static class ct1 extends ct0 {
            public void message() {
            }
        }

        static class ct2 extends ct0 {
            public void message() {
            }
        }

        public static void main(String[] args) throws Exception {
            for (int i = 0; i < 20000; i++) {
                Thread t = null;
                switch (i % 3) {
                    case 0:
                        t = new ct0();
                        break;
                    case 1:
                        t = new ct1();
                        break;
                    case 2:
                        t = new ct2();
                        break;
                }
                t.start();
                t.join();
            }
        }
    }
}