1 /* 2 * Copyright (c) 2011, 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 package org.graalvm.compiler.nodes; 24 25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_8; 26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_4; 27 28 import org.graalvm.compiler.core.common.type.StampFactory; 29 import org.graalvm.compiler.graph.NodeClass; 30 import org.graalvm.compiler.nodeinfo.NodeInfo; 31 import org.graalvm.compiler.nodes.spi.LIRLowerable; 32 import org.graalvm.compiler.nodes.spi.Lowerable; 33 import org.graalvm.compiler.nodes.spi.LoweringTool; 34 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 35 36 import jdk.vm.ci.meta.JavaKind; 37 38 /** 39 * Unwinds the current frame to an exception handler in the caller frame. 40 */ 41 @NodeInfo(cycles = CYCLES_8, size = SIZE_4) 42 public final class UnwindNode extends ControlSinkNode implements Lowerable, LIRLowerable { 43 44 public static final NodeClass<UnwindNode> TYPE = NodeClass.create(UnwindNode.class); 45 @Input ValueNode exception; 46 47 public ValueNode exception() { 48 return exception; 49 } 50 51 public UnwindNode(ValueNode exception) { 52 super(TYPE, StampFactory.forVoid()); 53 assert exception.getStackKind() == JavaKind.Object; 54 this.exception = exception; 55 } 56 57 @Override 58 public void lower(LoweringTool tool) { 59 tool.getLowerer().lower(this, tool); 60 } 61 62 @Override 63 public void generate(NodeLIRBuilderTool gen) { 64 gen.getLIRGeneratorTool().emitUnwind(gen.operand(exception())); 65 } 66 }