1 /* 2 * Copyright (c) 2015, 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 8142303 27 * @summary Tests handling of invalid array indices in C2 intrinsic if explicit range check in Java code is not inlined. 28 * 29 * @run main/othervm 30 * -XX:CompileCommand=inline,java.lang.String::* 31 * -XX:CompileCommand=inline,java.lang.StringUTF16::* 32 * -XX:CompileCommand=exclude,java.lang.String::checkBoundsOffCount 33 * compiler.intrinsics.string.TestStringConstruction 34 */ 35 36 package compiler.intrinsics.string; 37 38 public class TestStringConstruction { 39 40 public static void main(String[] args) { 41 char[] chars = new char[42]; 42 for (int i = 0; i < 10_000; ++i) { 43 test(chars); 44 } 45 } 46 47 private static String test(char[] chars) { 48 try { 49 // The constructor calls String::checkBoundsOffCount(-1, 42) to perform 50 // range checks on offset and count. If this method is not inlined, C2 51 // does not know about the explicit range checks and does not cut off the 52 // dead code. As a result, -1 is fed as offset into the StringUTF16.compress 53 // intrinsic which is replaced by TOP and causes a failure in the matcher. 54 return new String(chars, -1 , 42); 55 } catch (Exception e) { 56 return ""; 57 } 58 } 59 } 60