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. 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 */ 23package org.graalvm.compiler.hotspot.stubs; 24 25import org.graalvm.compiler.api.replacements.Snippet; 26import org.graalvm.compiler.api.replacements.Snippet.ConstantParameter; 27import org.graalvm.compiler.debug.GraalError; 28import org.graalvm.compiler.hotspot.HotSpotForeignCallLinkage; 29import org.graalvm.compiler.hotspot.meta.HotSpotProviders; 30import org.graalvm.compiler.hotspot.nodes.AllocaNode; 31import org.graalvm.compiler.options.OptionValues; 32import org.graalvm.compiler.word.Word; 33 34import jdk.vm.ci.code.Register; 35 36/** 37 * Stub to allocate an {@link ArrayIndexOutOfBoundsException} thrown by a bytecode. 38 */ 39public class OutOfBoundsExceptionStub extends CreateExceptionStub { 40 41 public OutOfBoundsExceptionStub(OptionValues options, HotSpotProviders providers, HotSpotForeignCallLinkage linkage) { 42 super("createOutOfBoundsException", options, providers, linkage); 43 } 44 45 private static final int MAX_INT_STRING_SIZE = Integer.toString(Integer.MIN_VALUE).length(); 46 47 @Override 48 protected Object getConstantParameterValue(int index, String name) { 49 switch (index) { 50 case 1: 51 return providers.getRegisters().getThreadRegister(); 52 case 2: 53 int wordSize = providers.getWordTypes().getWordKind().getByteCount(); 54 // (MAX_INT_STRING_SIZE + 1) / wordSize, rounded up 55 return MAX_INT_STRING_SIZE / wordSize + 1; 56 default: 57 throw GraalError.shouldNotReachHere("unknown parameter " + name + " at index " + index); 58 } 59 } 60 61 @Snippet 62 private static Object createOutOfBoundsException(int idx, @ConstantParameter Register threadRegister, @ConstantParameter int bufferSizeInWords) { 63 Word buffer = AllocaNode.alloca(bufferSizeInWords); 64 65 long number = idx; 66 if (number < 0) { 67 number = -number; 68 } 69 70 Word ptr = buffer.add(MAX_INT_STRING_SIZE); 71 ptr.writeByte(0, (byte) 0); 72 do { 73 long digit = number % 10; 74 number /= 10; 75 76 ptr = ptr.subtract(1); 77 ptr.writeByte(0, (byte) ('0' + digit)); 78 } while (number > 0); 79 80 if (idx < 0) { 81 ptr = ptr.subtract(1); 82 ptr.writeByte(0, (byte) '-'); 83 } 84 85 return createException(threadRegister, ArrayIndexOutOfBoundsException.class, ptr); 86 } 87} 88