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