| /* |
| * Copyright (c) 2016, 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 static org.graalvm.compiler.core.common.GraalOptions.ImmutableCode; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.graalvm.compiler.debug.GraalError; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig; |
| import org.graalvm.compiler.options.OptionValues; |
| import org.graalvm.compiler.replacements.SnippetCounter; |
| |
| import jdk.vm.ci.meta.JavaConstant; |
| import jdk.vm.ci.meta.MetaAccessProvider; |
| import jdk.vm.ci.meta.ResolvedJavaField; |
| import jdk.vm.ci.meta.ResolvedJavaType; |
| |
| /** |
| * Extends {@link HotSpotConstantFieldProvider} to override the implementation of |
| * {@link #readConstantField} with Graal specific semantics. |
| */ |
| public class HotSpotGraalConstantFieldProvider extends HotSpotConstantFieldProvider { |
| |
| public HotSpotGraalConstantFieldProvider(GraalHotSpotVMConfig config, MetaAccessProvider metaAccess) { |
| super(config, metaAccess); |
| this.metaAccess = metaAccess; |
| } |
| |
| @Override |
| protected boolean isStaticFieldConstant(ResolvedJavaField field, OptionValues options) { |
| return super.isStaticFieldConstant(field, options) && (!ImmutableCode.getValue(options) || isEmbeddableField(field)); |
| } |
| |
| /** |
| * The set of fields whose values cannot be constant folded in ImmutableCode mode. This is |
| * volatile to support double-checked locking lazy initialization. |
| */ |
| private volatile List<ResolvedJavaField> nonEmbeddableFields; |
| |
| protected boolean isEmbeddableField(ResolvedJavaField field) { |
| if (nonEmbeddableFields == null) { |
| synchronized (this) { |
| if (nonEmbeddableFields == null) { |
| List<ResolvedJavaField> fields = new ArrayList<>(); |
| try { |
| fields.add(metaAccess.lookupJavaField(Boolean.class.getDeclaredField("TRUE"))); |
| fields.add(metaAccess.lookupJavaField(Boolean.class.getDeclaredField("FALSE"))); |
| |
| Class<?> characterCacheClass = Character.class.getDeclaredClasses()[0]; |
| assert "java.lang.Character$CharacterCache".equals(characterCacheClass.getName()); |
| fields.add(metaAccess.lookupJavaField(characterCacheClass.getDeclaredField("cache"))); |
| |
| Class<?> byteCacheClass = Byte.class.getDeclaredClasses()[0]; |
| assert "java.lang.Byte$ByteCache".equals(byteCacheClass.getName()); |
| fields.add(metaAccess.lookupJavaField(byteCacheClass.getDeclaredField("cache"))); |
| |
| Class<?> shortCacheClass = Short.class.getDeclaredClasses()[0]; |
| assert "java.lang.Short$ShortCache".equals(shortCacheClass.getName()); |
| fields.add(metaAccess.lookupJavaField(shortCacheClass.getDeclaredField("cache"))); |
| |
| Class<?> integerCacheClass = Integer.class.getDeclaredClasses()[0]; |
| assert "java.lang.Integer$IntegerCache".equals(integerCacheClass.getName()); |
| fields.add(metaAccess.lookupJavaField(integerCacheClass.getDeclaredField("cache"))); |
| |
| Class<?> longCacheClass = Long.class.getDeclaredClasses()[0]; |
| assert "java.lang.Long$LongCache".equals(longCacheClass.getName()); |
| fields.add(metaAccess.lookupJavaField(longCacheClass.getDeclaredField("cache"))); |
| |
| fields.add(metaAccess.lookupJavaField(Throwable.class.getDeclaredField("UNASSIGNED_STACK"))); |
| fields.add(metaAccess.lookupJavaField(Throwable.class.getDeclaredField("SUPPRESSED_SENTINEL"))); |
| } catch (SecurityException | NoSuchFieldException e) { |
| throw new GraalError(e); |
| } |
| nonEmbeddableFields = fields; |
| } |
| } |
| } |
| return !nonEmbeddableFields.contains(field); |
| } |
| |
| @Override |
| protected boolean isFinalFieldValueConstant(ResolvedJavaField field, JavaConstant value, ConstantFieldTool<?> tool) { |
| if (super.isFinalFieldValueConstant(field, value, tool)) { |
| return true; |
| } |
| |
| if (!field.isStatic()) { |
| JavaConstant receiver = tool.getReceiver(); |
| if (getSnippetCounterType().isInstance(receiver) || getNodeClassType().isInstance(receiver)) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| @Override |
| protected boolean isStableFieldValueConstant(ResolvedJavaField field, JavaConstant value, ConstantFieldTool<?> tool) { |
| if (super.isStableFieldValueConstant(field, value, tool)) { |
| return true; |
| } |
| |
| if (!field.isStatic()) { |
| JavaConstant receiver = tool.getReceiver(); |
| if (getHotSpotVMConfigType().isInstance(receiver)) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| private final MetaAccessProvider metaAccess; |
| |
| private ResolvedJavaType cachedHotSpotVMConfigType; |
| private ResolvedJavaType cachedSnippetCounterType; |
| private ResolvedJavaType cachedNodeClassType; |
| |
| private ResolvedJavaType getHotSpotVMConfigType() { |
| if (cachedHotSpotVMConfigType == null) { |
| cachedHotSpotVMConfigType = metaAccess.lookupJavaType(GraalHotSpotVMConfig.class); |
| } |
| return cachedHotSpotVMConfigType; |
| } |
| |
| private ResolvedJavaType getSnippetCounterType() { |
| if (cachedSnippetCounterType == null) { |
| cachedSnippetCounterType = metaAccess.lookupJavaType(SnippetCounter.class); |
| } |
| return cachedSnippetCounterType; |
| } |
| |
| private ResolvedJavaType getNodeClassType() { |
| if (cachedNodeClassType == null) { |
| cachedNodeClassType = metaAccess.lookupJavaType(NodeClass.class); |
| } |
| return cachedNodeClassType; |
| } |
| } |