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 *
32 * @build java.base/java.lang.Helper
33 * @build compiler.intrinsics.string.TestStringIntrinsicRangeChecks
34 * @run main compiler.intrinsics.string.TestStringIntrinsicRangeChecks
35 */
36
37 package compiler.intrinsics.string;
38
39 import java.lang.reflect.InvocationTargetException;
40 import java.lang.reflect.Method;
41
42 public class TestStringIntrinsicRangeChecks {
43 // Prepare test arrays
44 private static int SIZE = 16;
45 private static byte[] byteArray = new byte[SIZE];
46 private static char[] charArray = new char[SIZE];
47
48 public static void check(Method m, boolean shouldThrow, Object... args) throws Exception {
49 // Prepare error message
50 String message = m.getName() + "(";
51 for (int i = 0; i < args.length; ++i) {
52 message += args[i];
53 message += (i+1 < args.length) ? ", " : ")";
54 }
55
56 try {
57 m.invoke(null, args);
58 } catch (InvocationTargetException e) {
59 // Get actual exception
60 Throwable t = e.getTargetException();
61 if (!shouldThrow) {
62 throw new RuntimeException("Unexpected exception thrown for " + message, e);
63 }
64 if (t instanceof StringIndexOutOfBoundsException ||
65 t instanceof ArrayIndexOutOfBoundsException) {
66 // Expected exception. Make sure that the exception was not thrown in UTF16.putChar/getChar
67 // because the corresponding intrinsics are unchecked and the Java code should do all the checks.
68 StackTraceElement[] stack = t.getStackTrace();
69 if (stack.length != 0) {
70 String methodName = stack[0].getMethodName();
71 if (methodName.equals("putChar") || methodName.equals("getChar")) {
72 throw new RuntimeException("Exception thrown in " + methodName + " for " + message, t);
73 }
74 }
75 }
76 return;
77 }
78 if (shouldThrow) {
79 throw new RuntimeException("No exception thrown for " + message);
80 }
81 }
82
83 public static void main(String[] args) throws Exception {
84 // Get intrinsified String API methods
85 Method compressByte = Helper.class.getMethod("compressByte", byte[].class, int.class, int.class, int.class, int.class);
86 Method compressChar = Helper.class.getMethod("compressChar", char[].class, int.class, int.class, int.class, int.class);
87 Method inflateByte = Helper.class.getMethod("inflateByte", byte[].class, int.class, int.class, int.class, int.class);
88 Method inflateChar = Helper.class.getMethod("inflateChar", byte[].class, int.class, int.class, int.class, int.class);
89 Method toBytes = Helper.class.getMethod("toBytes", char[].class, int.class, int.class);
90 Method getChars = Helper.class.getMethod("getChars", byte[].class, int.class, int.class, int.class, int.class);
91
92 // Check different combinations of arguments (source/destination offset and length)
93 for (int srcOff = 0; srcOff < SIZE; ++srcOff) {
94 for (int dstOff = 0; dstOff < SIZE; ++dstOff) {
95 for (int len = 0; len < SIZE; ++len) {
96 // Check for potential overlows in source or destination array
97 boolean srcOverflow = (srcOff + len) > SIZE;
98 boolean srcOverflowB = (2*srcOff + 2*len) > SIZE;
99 boolean dstOverflow = (dstOff + len) > SIZE;
100 boolean dstOverflowB = (2*dstOff + 2*len) > SIZE;
101 boolean getCharsOver = (srcOff < len) && ((2*(len-1) >= SIZE) || ((dstOff + len - srcOff) > SIZE));
102 // Check if an exception is thrown and bail out if result is inconsistent with above
103 // assumptions (for example, an exception was not thrown although an overflow happened).
104 check(compressByte, srcOverflowB || dstOverflow, byteArray, srcOff, SIZE, dstOff, len);
105 check(compressChar, srcOverflow || dstOverflow, charArray, srcOff, SIZE, dstOff, len);
106 check(inflateByte, srcOverflow || dstOverflowB, byteArray, srcOff, SIZE, dstOff, len);
107 check(inflateChar, srcOverflow || dstOverflow, byteArray, srcOff, SIZE, dstOff, len);
108 check(toBytes, srcOverflow, charArray, srcOff, len);
109 check(getChars, getCharsOver, byteArray, srcOff, len, SIZE, dstOff);
110 }
111 }
112 }
113 }
114 }