1 /*
2 * Copyright (c) 2016, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 /*
27 * @test
28 * @bug 8155608
29 * @summary Verifies that string intrinsics throw array out of bounds exceptions.
30 * @library /compiler/patches /testlibrary /test/lib
31 * @build java.base/java.lang.Helper
32 * @build compiler.intrinsics.string.TestStringIntrinsicRangeChecks
33 * @run main/othervm -Xbatch -XX:CompileThreshold=100 -XX:-TieredCompilation compiler.intrinsics.string.TestStringIntrinsicRangeChecks
34 */
35 package compiler.intrinsics.string;
36
37 import java.lang.Helper;
38 import java.lang.reflect.InvocationTargetException;
39 import java.lang.reflect.Method;
40
41 public class TestStringIntrinsicRangeChecks {
42 // Prepare test arrays
43 private static int SIZE = 16;
44 private static byte[] byteArray = new byte[SIZE];
45 private static char[] charArray = new char[SIZE];
46
47 public static void check(Method m, boolean shouldThrow, Object... args) throws Exception {
48 // Prepare error message
49 String message = m.getName() + "(";
50 for (int i = 0; i < args.length; ++i) {
51 message += args[i];
52 message += (i+1 < args.length) ? ", " : ")";
53 }
54
55 try {
56 m.invoke(null, args);
57 } catch (InvocationTargetException e) {
58 // Get actual exception
59 Throwable t = e.getTargetException();
60 if (!shouldThrow) {
61 throw new RuntimeException("Unexpected exception thrown for " + message, e);
62 }
63 if (t instanceof StringIndexOutOfBoundsException ||
64 t instanceof ArrayIndexOutOfBoundsException) {
65 // Expected exception. Make sure that the exception was not thrown in UTF16.putChar/getChar
66 // because the corresponding intrinsics are unchecked and the Java code should do all the checks.
67 StackTraceElement[] stack = t.getStackTrace();
68 if (stack.length != 0) {
69 String methodName = stack[0].getMethodName();
70 if (methodName.equals("putChar") || methodName.equals("getChar")) {
71 throw new RuntimeException("Exception thrown in " + methodName + " for " + message, t);
72 }
73 }
74 }
75 return;
76 }
77 if (shouldThrow) {
78 throw new RuntimeException("No exception thrown for " + message);
79 }
80 }
81
82 public static void main(String[] args) throws Exception {
83 // Get intrinsified String API methods
84 Method compressByte = Helper.class.getMethod("compressByte", byte[].class, int.class, int.class, int.class, int.class);
85 Method compressChar = Helper.class.getMethod("compressChar", char[].class, int.class, int.class, int.class, int.class);
86 Method inflateByte = Helper.class.getMethod("inflateByte", byte[].class, int.class, int.class, int.class, int.class);
87 Method inflateChar = Helper.class.getMethod("inflateChar", byte[].class, int.class, int.class, int.class, int.class);
88 Method toBytes = Helper.class.getMethod("toBytes", char[].class, int.class, int.class);
89 Method getChars = Helper.class.getMethod("getChars", byte[].class, int.class, int.class, int.class, int.class);
90
91 // Check different combinations of arguments (source/destination offset and length)
92 for (int srcOff = 0; srcOff < SIZE; ++srcOff) {
93 for (int dstOff = 0; dstOff < SIZE; ++dstOff) {
94 for (int len = 0; len < SIZE; ++len) {
95 // Check for potential overlows in source or destination array
96 boolean srcOverflow = (srcOff + len) > SIZE;
97 boolean srcOverflowB = (2*srcOff + 2*len) > SIZE;
98 boolean dstOverflow = (dstOff + len) > SIZE;
99 boolean dstOverflowB = (2*dstOff + 2*len) > SIZE;
100 boolean getCharsOver = (srcOff < len) && ((2*(len-1) >= SIZE) || ((dstOff + len - srcOff) > SIZE));
101 // Check if an exception is thrown and bail out if result is inconsistent with above
102 // assumptions (for example, an exception was not thrown although an overflow happened).
103 check(compressByte, srcOverflowB || dstOverflow, byteArray, srcOff, SIZE, dstOff, len);
104 check(compressChar, srcOverflow || dstOverflow, charArray, srcOff, SIZE, dstOff, len);
105 check(inflateByte, srcOverflow || dstOverflowB, byteArray, srcOff, SIZE, dstOff, len);
106 check(inflateChar, srcOverflow || dstOverflow, byteArray, srcOff, SIZE, dstOff, len);
107 check(toBytes, srcOverflow, charArray, srcOff, len);
108 check(getChars, getCharsOver, byteArray, srcOff, len, SIZE, dstOff);
109 }
110 }
111 }
112 }
113 }