--- /dev/null 2016-05-31 09:42:47.975716356 -0700 +++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/meta/HotSpotClassInitializationPlugin.java 2016-12-09 00:49:23.567059652 -0800 @@ -0,0 +1,68 @@ +/* + * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package org.graalvm.compiler.hotspot.meta; + +import org.graalvm.compiler.core.common.type.ObjectStamp; +import org.graalvm.compiler.core.common.type.Stamp; +import org.graalvm.compiler.core.common.type.StampFactory; +import org.graalvm.compiler.hotspot.nodes.aot.InitializeKlassNode; +import org.graalvm.compiler.nodes.ConstantNode; +import org.graalvm.compiler.nodes.FrameState; +import org.graalvm.compiler.nodes.ValueNode; +import org.graalvm.compiler.nodes.graphbuilderconf.ClassInitializationPlugin; +import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext; + +import jdk.vm.ci.hotspot.HotSpotResolvedObjectType; +import jdk.vm.ci.meta.ResolvedJavaMethod; +import jdk.vm.ci.meta.ResolvedJavaType; + +public final class HotSpotClassInitializationPlugin implements ClassInitializationPlugin { + @Override + public boolean shouldApply(GraphBuilderContext builder, ResolvedJavaType type) { + if (!builder.parsingIntrinsic()) { + ResolvedJavaMethod method = builder.getGraph().method(); + ResolvedJavaType methodHolder = method.getDeclaringClass(); + // We can elide initialization nodes if type >=: methodHolder. + // The type is already initialized by either "new" or "invokestatic". + + // Emit initialization node if type is an interface since: + // JLS 12.4: Before a class is initialized, its direct superclass must be initialized, + // but interfaces implemented by the class are not initialized. + // and a class or interface type T will be initialized immediately + // before the first occurrence of accesses listed in JLS 12.4.1. + + return !type.isAssignableFrom(methodHolder) || type.isInterface(); + } + return false; + } + + @Override + public ValueNode apply(GraphBuilderContext builder, ResolvedJavaType type, FrameState frameState) { + assert shouldApply(builder, type); + Stamp hubStamp = builder.getStampProvider().createHubStamp((ObjectStamp) StampFactory.objectNonNull()); + ConstantNode hub = builder.append(ConstantNode.forConstant(hubStamp, ((HotSpotResolvedObjectType) type).klass(), builder.getMetaAccess(), builder.getGraph())); + InitializeKlassNode initialize = builder.append(new InitializeKlassNode(hub)); + initialize.setStateBefore(frameState); + return initialize; + } +}