| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
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| */ |
| |
| /* |
| * @test |
| * @bug 8155608 |
| * @summary Verifies that string intrinsics throw array out of bounds exceptions. |
| * @library /compiler/patches /test/lib |
| * @build java.base/java.lang.Helper |
| * @run main/othervm -Xbatch -XX:CompileThreshold=100 -XX:-TieredCompilation compiler.intrinsics.string.TestStringIntrinsicRangeChecks |
| */ |
| package compiler.intrinsics.string; |
| |
| import java.lang.Helper; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| |
| public class TestStringIntrinsicRangeChecks { |
| // Prepare test arrays |
| private static int SIZE = 16; |
| private static byte[] byteArray = new byte[SIZE]; |
| private static char[] charArray = new char[SIZE]; |
| |
| public static void check(Method m, boolean shouldThrow, Object... args) throws Exception { |
| // Prepare error message |
| String message = m.getName() + "("; |
| for (int i = 0; i < args.length; ++i) { |
| message += args[i]; |
| message += (i+1 < args.length) ? ", " : ")"; |
| } |
| |
| try { |
| m.invoke(null, args); |
| } catch (InvocationTargetException e) { |
| // Get actual exception |
| Throwable t = e.getTargetException(); |
| if (!shouldThrow) { |
| throw new RuntimeException("Unexpected exception thrown for " + message, e); |
| } |
| if (t instanceof StringIndexOutOfBoundsException || |
| t instanceof ArrayIndexOutOfBoundsException) { |
| // Expected exception. Make sure that the exception was not thrown in UTF16.putChar/getChar |
| // because the corresponding intrinsics are unchecked and the Java code should do all the checks. |
| StackTraceElement[] stack = t.getStackTrace(); |
| if (stack.length != 0) { |
| String methodName = stack[0].getMethodName(); |
| if (methodName.equals("putChar") || methodName.equals("getChar")) { |
| throw new RuntimeException("Exception thrown in " + methodName + " for " + message, t); |
| } |
| } |
| } |
| return; |
| } |
| if (shouldThrow) { |
| throw new RuntimeException("No exception thrown for " + message); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| // Get intrinsified String API methods |
| Method compressByte = Helper.class.getMethod("compressByte", byte[].class, int.class, int.class, int.class, int.class); |
| Method compressChar = Helper.class.getMethod("compressChar", char[].class, int.class, int.class, int.class, int.class); |
| Method inflateByte = Helper.class.getMethod("inflateByte", byte[].class, int.class, int.class, int.class, int.class); |
| Method inflateChar = Helper.class.getMethod("inflateChar", byte[].class, int.class, int.class, int.class, int.class); |
| Method toBytes = Helper.class.getMethod("toBytes", char[].class, int.class, int.class); |
| Method getChars = Helper.class.getMethod("getChars", byte[].class, int.class, int.class, int.class, int.class); |
| |
| // Check different combinations of arguments (source/destination offset and length) |
| for (int srcOff = 0; srcOff < SIZE; ++srcOff) { |
| for (int dstOff = 0; dstOff < SIZE; ++dstOff) { |
| for (int len = 0; len < SIZE; ++len) { |
| // Check for potential overlows in source or destination array |
| boolean srcOverflow = (srcOff + len) > SIZE; |
| boolean srcOverflowB = (2*srcOff + 2*len) > SIZE; |
| boolean dstOverflow = (dstOff + len) > SIZE; |
| boolean dstOverflowB = (2*dstOff + 2*len) > SIZE; |
| boolean getCharsOver = (srcOff < len) && ((2*(len-1) >= SIZE) || ((dstOff + len - srcOff) > SIZE)); |
| // Check if an exception is thrown and bail out if result is inconsistent with above |
| // assumptions (for example, an exception was not thrown although an overflow happened). |
| check(compressByte, srcOverflowB || dstOverflow, byteArray, srcOff, SIZE, dstOff, len); |
| check(compressChar, srcOverflow || dstOverflow, charArray, srcOff, SIZE, dstOff, len); |
| check(inflateByte, srcOverflow || dstOverflowB, byteArray, srcOff, SIZE, dstOff, len); |
| check(inflateChar, srcOverflow || dstOverflow, byteArray, srcOff, SIZE, dstOff, len); |
| check(toBytes, srcOverflow, charArray, srcOff, len); |
| check(getChars, getCharsOver, byteArray, srcOff, len, SIZE, dstOff); |
| } |
| } |
| } |
| } |
| } |