TestHashCode.java revision 11707:ad7af1afda7a 
1/*
2 * Copyright (c) 2014, Oracle and/or its affiliates. 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 8011646
27 * @summary SEGV in compiled code with loop predication
28 *
29 * @run main/othervm  -XX:-TieredCompilation
30 *      -XX:CompileCommand=compileonly,java.lang.Object::hashCode
31 *      -XX:CompileCommand=compileonly,compiler.intrinsics.object.TestHashCode::m1
32 *      compiler.intrinsics.object.TestHashCode
33 */
34
35package compiler.intrinsics.object;
36
37public class TestHashCode {
38    static class A {
39        int i;
40    }
41
42    static class B extends A {
43    }
44
45    static boolean crash = false;
46
47    static A m2() {
48        if (crash) {
49            return null;
50        }
51        return new A();
52    }
53
54    static int m1(A aa) {
55        int res = 0;
56        for (int i = 0; i < 10; i++) {
57            A a = m2();
58            int j = a.i;
59            if (aa instanceof B) {
60            }
61            res += a.hashCode();
62        }
63        return res;
64    }
65
66    public static void main(String[] args) {
67        A a = new A();
68        for (int i = 0; i < 20000; i++) {
69            m1(a);
70        }
71        crash = true;
72        try {
73          m1(a);
74        } catch (NullPointerException e) {
75            System.out.println("Test passed");
76        }
77    }
78}
79