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 package org.graalvm.compiler.hotspot.meta; 24 25 import org.graalvm.compiler.core.common.type.ObjectStamp; 26 import org.graalvm.compiler.core.common.type.Stamp; 27 import org.graalvm.compiler.core.common.type.StampFactory; 28 import org.graalvm.compiler.hotspot.nodes.aot.InitializeKlassNode; 29 import org.graalvm.compiler.nodes.ConstantNode; 30 import org.graalvm.compiler.nodes.FrameState; 31 import org.graalvm.compiler.nodes.ValueNode; 32 import org.graalvm.compiler.nodes.graphbuilderconf.ClassInitializationPlugin; 33 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext; 34 35 import jdk.vm.ci.hotspot.HotSpotResolvedObjectType; 36 import jdk.vm.ci.meta.ResolvedJavaMethod; 37 import jdk.vm.ci.meta.ResolvedJavaType; 38 39 public final class HotSpotClassInitializationPlugin implements ClassInitializationPlugin { 40 @Override 41 public boolean shouldApply(GraphBuilderContext builder, ResolvedJavaType type) { 42 if (!builder.parsingIntrinsic()) { 43 ResolvedJavaMethod method = builder.getGraph().method(); 44 ResolvedJavaType methodHolder = method.getDeclaringClass(); 45 // We can elide initialization nodes if type >=: methodHolder. 46 // The type is already initialized by either "new" or "invokestatic". 47 48 // Emit initialization node if type is an interface since: 49 // JLS 12.4: Before a class is initialized, its direct superclass must be initialized, 50 // but interfaces implemented by the class are not initialized. 51 // and a class or interface type T will be initialized immediately 52 // before the first occurrence of accesses listed in JLS 12.4.1. 53 54 return !type.isAssignableFrom(methodHolder) || type.isInterface(); 55 } 56 return false; 57 } 58 59 @Override 60 public ValueNode apply(GraphBuilderContext builder, ResolvedJavaType type, FrameState frameState) { 61 assert shouldApply(builder, type); 62 Stamp hubStamp = builder.getStampProvider().createHubStamp((ObjectStamp) StampFactory.objectNonNull()); 63 ConstantNode hub = builder.append(ConstantNode.forConstant(hubStamp, ((HotSpotResolvedObjectType) type).klass(), builder.getMetaAccess(), builder.getGraph())); 64 InitializeKlassNode initialize = builder.append(new InitializeKlassNode(hub)); 65 initialize.setStateBefore(frameState); 66 return initialize; 67 } 68 }