1 /*
2 * Copyright (c) 2016, 2018, 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 8155608
27 * @summary Verifies that string intrinsics throw array out of bounds exceptions.
28 * @library /compiler/patches /test/lib
29 * @build java.base/java.lang.Helper
30 * @run main/othervm -Xbatch -XX:CompileThreshold=100 compiler.intrinsics.string.TestStringIntrinsicRangeChecks
31 */
32 package compiler.intrinsics.string;
33
34 import java.lang.Helper;
35 import java.lang.reflect.InvocationTargetException;
36 import java.lang.reflect.Method;
37
38 public class TestStringIntrinsicRangeChecks {
39 // Prepare test arrays
40 private static int SIZE = 16;
41 private static byte[] byteArray = new byte[SIZE];
42 private static char[] charArray = new char[SIZE];
43
44 public static void check(Method m, boolean shouldThrow, Object... args) throws Exception {
45 // Prepare error message
46 String message = m.getName() + "(";
47 for (int i = 0; i < args.length; ++i) {
48 message += args[i];
49 message += (i+1 < args.length) ? ", " : ")";
50 }
51
52 try {
53 m.invoke(null, args);
54 } catch (InvocationTargetException e) {
55 // Get actual exception
56 Throwable t = e.getTargetException();
57 if (!shouldThrow) {
58 throw new RuntimeException("Unexpected exception thrown for " + message, e);
59 }
60 if (t instanceof StringIndexOutOfBoundsException ||
61 t instanceof ArrayIndexOutOfBoundsException) {
62 // Expected exception. Make sure that the exception was not thrown in UTF16.putChar/getChar
63 // because the corresponding intrinsics are unchecked and the Java code should do all the checks.
64 StackTraceElement[] stack = t.getStackTrace();
65 if (stack.length != 0) {
66 String methodName = stack[0].getMethodName();
67 if (methodName.equals("putChar") || methodName.equals("getChar")) {
68 throw new RuntimeException("Exception thrown in " + methodName + " for " + message, t);
69 }
70 }
71 }
72 return;
73 }
74 if (shouldThrow) {
75 throw new RuntimeException("No exception thrown for " + message);
76 }
77 }
78
79 public static void main(String[] args) throws Exception {
80 // Get intrinsified String API methods
81 Method compressByte = Helper.class.getMethod("compressByte", byte[].class, int.class, int.class, int.class, int.class);
82 Method compressChar = Helper.class.getMethod("compressChar", char[].class, int.class, int.class, int.class, int.class);
83 Method inflateByte = Helper.class.getMethod("inflateByte", byte[].class, int.class, int.class, int.class, int.class);
84 Method inflateChar = Helper.class.getMethod("inflateChar", byte[].class, int.class, int.class, int.class, int.class);
85 Method toBytes = Helper.class.getMethod("toBytes", char[].class, int.class, int.class);
86 Method getChars = Helper.class.getMethod("getChars", byte[].class, int.class, int.class, int.class, int.class);
87
88 // Check different combinations of arguments (source/destination offset and length)
89 for (int srcOff = 0; srcOff < SIZE; ++srcOff) {
90 for (int dstOff = 0; dstOff < SIZE; ++dstOff) {
91 for (int len = 0; len < SIZE; ++len) {
92 // Check for potential overlows in source or destination array
93 boolean srcOverflow = (srcOff + len) > SIZE;
94 boolean srcOverflowB = (2*srcOff + 2*len) > SIZE;
95 boolean dstOverflow = (dstOff + len) > SIZE;
96 boolean dstOverflowB = (2*dstOff + 2*len) > SIZE;
97 boolean getCharsOver = (srcOff < len) && ((2*(len-1) >= SIZE) || ((dstOff + len - srcOff) > SIZE));
98 // Check if an exception is thrown and bail out if result is inconsistent with above
99 // assumptions (for example, an exception was not thrown although an overflow happened).
100 check(compressByte, srcOverflowB || dstOverflow, byteArray, srcOff, SIZE, dstOff, len);
101 check(compressChar, srcOverflow || dstOverflow, charArray, srcOff, SIZE, dstOff, len);
102 check(inflateByte, srcOverflow || dstOverflowB, byteArray, srcOff, SIZE, dstOff, len);
103 check(inflateChar, srcOverflow || dstOverflow, byteArray, srcOff, SIZE, dstOff, len);
104 check(toBytes, srcOverflow, charArray, srcOff, len);
105 check(getChars, getCharsOver, byteArray, srcOff, len, SIZE, dstOff);
106 }
107 }
108 }
109 }
110 }