1/*
2 * Copyright (c) 2015, 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 8142303
27 * @summary Tests handling of invalid array indices in C2 intrinsic if explicit range check in Java code is not inlined.
28 *
29 * @run main/othervm
30 *      -XX:CompileCommand=inline,java.lang.String::*
31 *      -XX:CompileCommand=inline,java.lang.StringUTF16::*
32 *      -XX:CompileCommand=exclude,java.lang.String::checkBoundsOffCount
33 *      compiler.intrinsics.string.TestStringConstruction
34 */
35
36package compiler.intrinsics.string;
37
38public class TestStringConstruction {
39
40    public static void main(String[] args) {
41        char[] chars = new char[42];
42        for (int i = 0; i < 10_000; ++i) {
43            test(chars);
44        }
45    }
46
47    private static String test(char[] chars) {
48        try {
49            // The constructor calls String::checkBoundsOffCount(-1, 42) to perform
50            // range checks on offset and count. If this method is not inlined, C2
51            // does not know about the explicit range checks and does not cut off the
52            // dead code. As a result, -1 is fed as offset into the StringUTF16.compress
53            // intrinsic which is replaced by TOP and causes a failure in the matcher.
54            return new String(chars, -1 , 42);
55        } catch (Exception e) {
56            return "";
57        }
58    }
59}
60
61