1 /* 2 * Copyright (c) 2011, 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 24 25 package org.graalvm.compiler.nodes.extended; 26 27 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_8; 28 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_8; 29 30 import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor; 31 import org.graalvm.compiler.core.common.type.StampFactory; 32 import org.graalvm.compiler.core.common.type.TypeReference; 33 import org.graalvm.compiler.debug.GraalError; 34 import org.graalvm.compiler.graph.Node; 35 import org.graalvm.compiler.graph.NodeClass; 36 import org.graalvm.compiler.graph.NodeInputList; 37 import org.graalvm.compiler.graph.spi.Canonicalizable; 38 import org.graalvm.compiler.graph.spi.CanonicalizerTool; 39 import org.graalvm.compiler.nodeinfo.NodeInfo; 40 import org.graalvm.compiler.nodeinfo.Verbosity; 41 import org.graalvm.compiler.nodes.ValueNode; 42 import org.graalvm.compiler.nodes.memory.AbstractMemoryCheckpoint; 43 import org.graalvm.compiler.nodes.memory.MemoryCheckpoint; 44 import org.graalvm.compiler.nodes.spi.Lowerable; 45 import org.graalvm.compiler.nodes.spi.LoweringTool; 46 import jdk.internal.vm.compiler.word.LocationIdentity; 47 48 import jdk.vm.ci.meta.MetaAccessProvider; 49 50 /** 51 * A node that represents an exception thrown implicitly by a Java bytecode. It can be lowered to 52 * either a {@linkplain ForeignCallDescriptor foreign} call or a pre-allocated exception object. 53 */ 54 // @formatter:off 55 @NodeInfo(cycles = CYCLES_8, 56 cyclesRationale = "Node will be lowered to a foreign call.", 57 size = SIZE_8) 58 // @formatter:on 59 public final class BytecodeExceptionNode extends AbstractMemoryCheckpoint implements Lowerable, MemoryCheckpoint.Single, Canonicalizable { 60 61 public enum BytecodeExceptionKind { 62 NULL_POINTER(0, NullPointerException.class), 63 OUT_OF_BOUNDS(2, ArrayIndexOutOfBoundsException.class), 64 CLASS_CAST(2, ClassCastException.class), 65 ARRAY_STORE(1, ArrayStoreException.class), 66 DIVISION_BY_ZERO(0, ArithmeticException.class); 67 68 final int numArguments; 69 final Class<? extends Throwable> exceptionClass; 70 BytecodeExceptionKind(int numArguments, Class<? extends Throwable> exceptionClass)71 BytecodeExceptionKind(int numArguments, Class<? extends Throwable> exceptionClass) { 72 this.numArguments = numArguments; 73 this.exceptionClass = exceptionClass; 74 } 75 } 76 77 public static final NodeClass<BytecodeExceptionNode> TYPE = NodeClass.create(BytecodeExceptionNode.class); 78 protected final BytecodeExceptionKind exceptionKind; 79 @Input NodeInputList<ValueNode> arguments; 80 BytecodeExceptionNode(MetaAccessProvider metaAccess, BytecodeExceptionKind exceptionKind, ValueNode... arguments)81 public BytecodeExceptionNode(MetaAccessProvider metaAccess, BytecodeExceptionKind exceptionKind, ValueNode... arguments) { 82 super(TYPE, StampFactory.objectNonNull(TypeReference.createExactTrusted(metaAccess.lookupJavaType(exceptionKind.exceptionClass)))); 83 this.exceptionKind = exceptionKind; 84 this.arguments = new NodeInputList<>(this, arguments); 85 GraalError.guarantee(arguments.length == exceptionKind.numArguments, "Mismatch in argument count for BytecodeExceptionNode"); 86 } 87 getExceptionKind()88 public BytecodeExceptionKind getExceptionKind() { 89 return exceptionKind; 90 } 91 92 @Override toString(Verbosity verbosity)93 public String toString(Verbosity verbosity) { 94 if (verbosity == Verbosity.Name) { 95 return super.toString(verbosity) + "#" + exceptionKind; 96 } 97 return super.toString(verbosity); 98 } 99 100 @Override getLocationIdentity()101 public LocationIdentity getLocationIdentity() { 102 return LocationIdentity.any(); 103 } 104 105 @Override canonical(CanonicalizerTool tool)106 public Node canonical(CanonicalizerTool tool) { 107 if (tool.allUsagesAvailable() && getUsageCount() == 0) { 108 return null; 109 } 110 return this; 111 } 112 113 @Override lower(LoweringTool tool)114 public void lower(LoweringTool tool) { 115 tool.getLowerer().lower(this, tool); 116 } 117 getArguments()118 public NodeInputList<ValueNode> getArguments() { 119 return arguments; 120 } 121 } 122