| /* |
| * 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.debug.GraalError; |
| import org.graalvm.compiler.hotspot.nodes.aot.InitializeKlassNode; |
| import org.graalvm.compiler.hotspot.nodes.aot.ResolveConstantNode; |
| import org.graalvm.compiler.nodes.ConstantNode; |
| import org.graalvm.compiler.nodes.DeoptimizingFixedWithNextNode; |
| 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; |
| import jdk.vm.ci.meta.ConstantPool; |
| |
| import java.lang.invoke.MethodHandle; |
| import java.lang.invoke.MethodHandles; |
| import java.lang.invoke.MethodType; |
| |
| public final class HotSpotClassInitializationPlugin implements ClassInitializationPlugin { |
| @Override |
| public boolean shouldApply(GraphBuilderContext builder, ResolvedJavaType type) { |
| if (!builder.parsingIntrinsic()) { |
| if (!type.isArray()) { |
| 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(); |
| } else if (!type.getComponentType().isPrimitive()) { |
| // Always apply to object array types |
| return true; |
| } |
| } |
| 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())); |
| DeoptimizingFixedWithNextNode result = builder.append(type.isArray() ? new ResolveConstantNode(hub) : new InitializeKlassNode(hub)); |
| result.setStateBefore(frameState); |
| return result; |
| } |
| |
| private static final Class<? extends ConstantPool> hscp; |
| private static final MethodHandle loadReferencedTypeIIZMH; |
| |
| static { |
| MethodHandle m = null; |
| Class<? extends ConstantPool> c = null; |
| try { |
| c = Class.forName("jdk.vm.ci.hotspot.HotSpotConstantPool").asSubclass(ConstantPool.class); |
| m = MethodHandles.lookup().findVirtual(c, "loadReferencedType", MethodType.methodType(void.class, int.class, int.class, boolean.class)); |
| } catch (Exception e) { |
| } |
| loadReferencedTypeIIZMH = m; |
| hscp = c; |
| } |
| |
| private static boolean isHotSpotConstantPool(ConstantPool cp) { |
| // jdk.vm.ci.hotspot.HotSpotConstantPool is final, so we can |
| // directly compare Classes. |
| return cp.getClass() == hscp; |
| } |
| |
| @Override |
| public boolean supportsLazyInitialization(ConstantPool cp) { |
| if (loadReferencedTypeIIZMH != null && isHotSpotConstantPool(cp)) { |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public void loadReferencedType(GraphBuilderContext builder, ConstantPool cp, int cpi, int opcode) { |
| if (loadReferencedTypeIIZMH != null && isHotSpotConstantPool(cp)) { |
| try { |
| loadReferencedTypeIIZMH.invoke(cp, cpi, opcode, false); |
| } catch (Throwable t) { |
| throw GraalError.shouldNotReachHere(t); |
| } |
| } else { |
| cp.loadReferencedType(cpi, opcode); |
| } |
| } |
| |
| } |