/*

 * Copyright (c) 2016 SAP SE. 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 8159620

 * @summary testing that -XX:-UseOnStackReplacement works with both -XX:(+/-)TieredCompilation

 * @modules java.base/jdk.internal.misc

 * @library /test/lib /

 *

 * @build sun.hotspot.WhiteBox

 * @run driver ClassFileInstaller sun.hotspot.WhiteBox

 *                              sun.hotspot.WhiteBox$WhiteBoxPermission

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+PrintCompilation

 *                   -XX:-BackgroundCompilation -XX:-TieredCompilation -XX:-UseOnStackReplacement

 *                   compiler.interpreter.DisableOSRTest

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+PrintCompilation

 *                   -XX:-BackgroundCompilation -XX:+TieredCompilation -XX:-UseOnStackReplacement

 *                   compiler.interpreter.DisableOSRTest

 */

package compiler.interpreter;

import sun.hotspot.WhiteBox;

import java.lang.reflect.Method;

import java.util.Random;

public class DisableOSRTest {

    private static final WhiteBox WB = WhiteBox.getWhiteBox();

    private static final Random RANDOM = new Random();

    public static int foo() {

        return RANDOM.nextInt();

    }

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

        Method m = DisableOSRTest.class.getMethod("main", String[].class);

        for (int i = 0; i < 100_000; i++) {

            foo();

        }

        if (WB.isMethodCompiled(m, true /* isOsr */)) {

            throw new RuntimeException("\"" + m + "\" shouldn't be OSR compiled if running with -XX:-UseOnStackReplacement!");

        }

    }

}