1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/compiler/c2/Test8202414.java Wed May 01 22:02:48 2019 +0530
1.3 @@ -0,0 +1,117 @@
1.4 +/*
1.5 + * Copyright (c) 2019, Huawei Technologies Co. Ltd. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +/**
1.28 + * @test
1.29 + * @bug 8202414
1.30 + * @summary Unsafe write after primitive array creation may result in array length change
1.31 + * @requires (os.arch != "sparc") & (os.arch != "sparcv9")
1.32 + * @run main/othervm compiler.c2.Test8202414
1.33 + */
1.34 +
1.35 +package compiler.c2;
1.36 +
1.37 +import sun.misc.Unsafe;
1.38 +import java.lang.reflect.Field;
1.39 +import java.security.AccessController;
1.40 +import java.security.PrivilegedAction;
1.41 +
1.42 +public class Test8202414 {
1.43 +
1.44 + public static void main(String[] args) {
1.45 + System.err.close();
1.46 + int count = 0;
1.47 + while (count++ < 120000) {
1.48 + test();
1.49 + }
1.50 + }
1.51 +
1.52 + public static void test() {
1.53 + byte[] newBufb = serByte(397);
1.54 + short[] newBufs = serShort(397);
1.55 + int[] newBufi = serInt(397);
1.56 + long[] newBufl = serLong(397);
1.57 + if (newBufb.length != 397 || newBufs.length != 397
1.58 + || newBufi.length != 397 || newBufl.length != 397) {
1.59 + System.out.println("array length internal error");
1.60 + throw new RuntimeException("Test failed");
1.61 + }
1.62 +
1.63 + }
1.64 +
1.65 + public static byte[] serByte(int bufLen) {
1.66 + byte[] buf = new byte[bufLen];
1.67 + THE_UNSAFE.putByte(buf, BYTE_ARRAY_BASE_OFFSET + 1, (byte) buf.length);
1.68 + System.err.println("ref " + buf);
1.69 + return buf;
1.70 + }
1.71 +
1.72 + public static short[] serShort(int bufLen) {
1.73 + short[] buf = new short[bufLen];
1.74 + THE_UNSAFE.putShort(buf, SHORT_ARRAY_BASE_OFFSET + 1, (short) buf.length);
1.75 + System.err.println("ref " + buf);
1.76 + return buf;
1.77 + }
1.78 +
1.79 + public static int[] serInt(int bufLen) {
1.80 + int[] buf = new int[bufLen];
1.81 + THE_UNSAFE.putInt(buf, INT_ARRAY_BASE_OFFSET + 1, buf.length);
1.82 + System.err.println("ref " + buf);
1.83 + return buf;
1.84 + }
1.85 +
1.86 + public static long[] serLong(int bufLen) {
1.87 + long[] buf = new long[bufLen];
1.88 + THE_UNSAFE.putLong(buf, LONG_ARRAY_BASE_OFFSET + 1, buf.length);
1.89 + System.err.println("ref " + buf);
1.90 + return buf;
1.91 + }
1.92 +
1.93 + /* Unsafe fields and initialization
1.94 + */
1.95 + static final Unsafe THE_UNSAFE;
1.96 + static final long BYTE_ARRAY_BASE_OFFSET;
1.97 + static final long SHORT_ARRAY_BASE_OFFSET;
1.98 + static final long INT_ARRAY_BASE_OFFSET;
1.99 + static final long LONG_ARRAY_BASE_OFFSET;
1.100 + static {
1.101 + THE_UNSAFE = (Unsafe) AccessController.doPrivileged (
1.102 + new PrivilegedAction<Object>() {
1.103 + @Override
1.104 + public Object run() {
1.105 + try {
1.106 + Field f = Unsafe.class.getDeclaredField("theUnsafe");
1.107 + f.setAccessible(true);
1.108 + return f.get(null);
1.109 + } catch (NoSuchFieldException | IllegalAccessException e) {
1.110 + throw new Error();
1.111 + }
1.112 + }
1.113 + }
1.114 + );
1.115 + BYTE_ARRAY_BASE_OFFSET = THE_UNSAFE.arrayBaseOffset(byte[].class);
1.116 + SHORT_ARRAY_BASE_OFFSET = THE_UNSAFE.arrayBaseOffset(short[].class);
1.117 + INT_ARRAY_BASE_OFFSET = THE_UNSAFE.arrayBaseOffset(int[].class);
1.118 + LONG_ARRAY_BASE_OFFSET = THE_UNSAFE.arrayBaseOffset(long[].class);
1.119 + }
1.120 +}
