1/*
2 * Copyright (c) 2016, SAP SE 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 8159611
27 * @summary The elimination of System.arraycopy by EscapeAnalysis prevents
28 *          an IndexOutOfBoundsException from being thrown if the arraycopy
29 *          is called with a negative length argument.
30 * @modules java.base/jdk.internal.misc
31 * @library /testlibrary /test/lib
32 * @build sun.hotspot.WhiteBox
33 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
34 *                                sun.hotspot.WhiteBox$WhiteBoxPermission
35 *
36 * @run main/othervm
37 *        -Xbootclasspath/a:.
38 *        -XX:+UnlockDiagnosticVMOptions
39 *        -XX:+WhiteBoxAPI
40 *        -XX:-UseOnStackReplacement
41 *        compiler.escapeAnalysis.TestArrayCopy
42 *
43 * @author Volker Simonis
44 */
45
46package compiler.escapeAnalysis;
47
48import sun.hotspot.WhiteBox;
49import java.lang.reflect.Method;
50
51public class TestArrayCopy {
52
53    private static final WhiteBox WB = WhiteBox.getWhiteBox();
54    // DST_LEN Must be const, otherwise EliminateAllocations won't work
55    static final int DST_LEN = 4;
56    static final int SRC_LEN = 8;
57
58    public static boolean do_test1(Object src, int src_pos, int dst_pos, int cpy_len) {
59        try {
60            System.arraycopy(src, src_pos, new Object[DST_LEN], dst_pos, cpy_len);
61            return false;
62        } catch (IndexOutOfBoundsException e) {
63            return true;
64        }
65    }
66
67    public static int do_test2(Object src, int src_pos, int dst_pos, int cpy_len) {
68        try {
69            System.arraycopy(src, src_pos, new Object[DST_LEN], dst_pos, cpy_len);
70            return 0;
71        } catch (IndexOutOfBoundsException e) {
72            return 1;
73        } catch (ArrayStoreException e) {
74            return 2;
75        }
76    }
77
78    static final int COUNT = 100_000;
79    static final int[] src_pos = { 0, -1, -1,  0,  0,  0,  1,  1,  1,  1, 1 };
80    static final int[] dst_pos = { 0, -1,  0, -1,  0,  1,  0,  1,  1,  1, 1 };
81    static final int[] cpy_len = { 0,  0,  0,  0, -1, -1, -1, -1,  8,  4, 2 };
82
83    public static void main(String args[]) throws Exception {
84        int length = args.length > 0 ? Integer.parseInt(args[0]) : -1;
85        int[] int_arr = new int[SRC_LEN];
86        Object[] obj_arr = new Object[SRC_LEN];
87
88        Method test1 = TestArrayCopy.class.getMethod("do_test1", Object.class, int.class, int.class, int.class);
89        Method test2 = TestArrayCopy.class.getMethod("do_test2", Object.class, int.class, int.class, int.class);
90
91        for (int i = 0; i < src_pos.length; i++) {
92            int sp = src_pos[i];
93            int dp = dst_pos[i];
94            int cl = cpy_len[i];
95            String version1 = String.format("System.arraycopy(Object[8], %d, new Object[%d], %d, %d)", sp, DST_LEN, dp, cl);
96            String version2 = String.format("System.arraycopy(int[8], %d, new Object[%d], %d, %d)", sp, DST_LEN, dp, cl);
97            System.out.format("Testing " + version1 + "\nand " + version2).flush();
98            for (int x = 0; x < COUNT; x++) {
99                if (!do_test1(obj_arr, sp, dp, cl) &&
100                    (sp < 0 || dp < 0 || cl < 0 || (sp + cl >= SRC_LEN) || (dp + cl >= DST_LEN))) {
101                    throw new RuntimeException("Expected IndexOutOfBoundsException for " + version1);
102                }
103                int res = do_test2(int_arr, sp, dp, cl);
104                if (res == 0 || res == 1) {
105                    throw new RuntimeException("Expected ArrayStoreException for " + version2);
106                }
107            }
108            WB.deoptimizeMethod(test1);
109            WB.clearMethodState(test1);
110            WB.deoptimizeMethod(test2);
111            WB.clearMethodState(test2);
112        }
113
114    }
115}
116