jdk

1
/*
2
 * Copyright (c) 2020, 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 8237581
27
 * @summary Testing allocation expansion when there is no use of the allocation
28
 * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:+PrintCompilation -XX:+PrintEliminateAllocations -XX:CompileCommand=compileonly,compiler.allocation.TestAllocation::test*
29
 *                   compiler.allocation.TestAllocation
30
 * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:+PrintCompilation -XX:+PrintEliminateAllocations -XX:-DoEscapeAnalysis -XX:CompileCommand=compileonly,compiler.allocation.TestAllocation::test*
31
 *                   compiler.allocation.TestAllocation
32
 */
33

34
package compiler.allocation;
35

36
public class TestAllocation {
37

38
    public static volatile int size = 128;
39
    public static volatile int neg_size = -128;
40

41
    public int testUnknownPositiveArrayLength() {
42
        Payload w = new Payload(17, size);
43
        return w.i + w.ba.length;
44
    }
45

46
    public int testStoreCapture() {
47
        byte[] bs = new byte[1];
48
        bs[0] = 1;
49
        return bs.length;
50
    }
51

52
    public int testUnknownNegativeArrayLength() {
53
        boolean success = false;
54
        try {
55
            Payload w = new Payload(17, neg_size);
56
            return w.i + w.ba.length;
57
        } catch (NegativeArraySizeException e) {
58
            success = true;
59
        }
60
        if (!success) {
61
            throw new RuntimeException("Should have thrown NegativeArraySizeException");
62
        }
63
        return 0;
64

65
    }
66

67
    public int testConstantPositiveArrayLength() {
68
        Payload w = new Payload(173, 10);
69
        return w.i + w.ba.length;
70
    }
71

72
    public int testConstantPositiveArrayLength2() {
73
        Payload w = new Payload(173, 10);
74
        w.i = 17;
75
        w.ba = new byte[10];
76
        return w.i + w.ba.length;
77
    }
78

79
    public int testConstantNegativeArrayLength() {
80
        boolean success = false;
81
        try {
82
            Payload w = new Payload(173, -10);
83
            return w.i + w.ba.length;
84
        } catch (NegativeArraySizeException e) {
85
            success = true;
86
        }
87
        if (!success) {
88
            throw new RuntimeException("Should have thrown NegativeArraySizeException");
89
        }
90
        return 0;
91
    }
92

93
    public static class Payload {
94
        public int i;
95
        public byte ba[];
96

97
        public Payload(int i, int size) {
98
            this.i = i;
99
            this.ba = new byte[size];
100
        }
101
    }
102

103
    public static void main(String[] strArr) {
104
        TestAllocation test = new TestAllocation();
105
        for (int i = 0; i < 10_000; i++ ) {
106
            test.testUnknownPositiveArrayLength();
107
            test.testUnknownNegativeArrayLength();
108
            test.testConstantPositiveArrayLength();
109
            test.testConstantPositiveArrayLength2();
110
            test.testConstantNegativeArrayLength();
111
            test.testStoreCapture();
112
        }
113
    }
114
}
115

116
class Wrapper {
117
    int[] arr;
118
    void setArr(int... many) { arr = many; }
119
}
120