Test6857159.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
 *
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 * 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
 * @bug 6857159
 * @summary local schedule failed with checkcast of Thread.currentThread()
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *
 * @build sun.hotspot.WhiteBox
 * @run driver jdk.test.lib.helpers.ClassFileInstaller sun.hotspot.WhiteBox
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
 *      -Xbatch -XX:CompileCommand=compileonly,compiler.c2.Test6857159$ct0::run
 *      compiler.c2.Test6857159
 */

package compiler.c2;

import sun.hotspot.WhiteBox;

public class Test6857159 extends Thread {
    public static void main(String[] args) throws Exception {
        var whiteBox = WhiteBox.getWhiteBox();
        var method = ct0.class.getDeclaredMethod("run");
        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();
        }
        if (!whiteBox.isMethodCompiled(method)) {
            throw new AssertionError(method + " didn't get compiled");
        }
    }

    static class ct0 extends Test6857159 {
        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() { }
    }
}