DisableOSRTest.java revision 11833:1cbffa2beba6 
1/*
2 * Copyright (c) 2016 SAP SE. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test
26 * @bug 8159620
27 * @summary testing that -XX:-UseOnStackReplacement works with both -XX:(+/-)TieredCompilation
28 * @modules java.base/jdk.internal.misc
29 * @library /test/lib /
30 *
31 * @build sun.hotspot.WhiteBox
32 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
33 *                              sun.hotspot.WhiteBox$WhiteBoxPermission
34 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+PrintCompilation
35 *                   -XX:-BackgroundCompilation -XX:-TieredCompilation -XX:-UseOnStackReplacement
36 *                   compiler.interpreter.DisableOSRTest
37 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+PrintCompilation
38 *                   -XX:-BackgroundCompilation -XX:+TieredCompilation -XX:-UseOnStackReplacement
39 *                   compiler.interpreter.DisableOSRTest
40 */
41
42package compiler.interpreter;
43
44import sun.hotspot.WhiteBox;
45
46import java.lang.reflect.Method;
47import java.util.Random;
48
49public class DisableOSRTest {
50    private static final WhiteBox WB = WhiteBox.getWhiteBox();
51    private static final Random RANDOM = new Random();
52
53    public static int foo() {
54        return RANDOM.nextInt();
55    }
56
57    public static void main(String[] args) throws Exception {
58        Method m = DisableOSRTest.class.getMethod("main", String[].class);
59
60        for (int i = 0; i < 100_000; i++) {
61            foo();
62        }
63
64        if (WB.isMethodCompiled(m, true /* isOsr */)) {
65            throw new RuntimeException("\"" + m + "\" shouldn't be OSR compiled if running with -XX:-UseOnStackReplacement!");
66        }
67    }
68}
69