Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotResolvedJavaFieldImpl.java @ 18530:2906b3cc3e2f
moved application of Remote marker interface to implementation classes only
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 26 Nov 2014 13:20:14 +0100 |
parents | f56a5c4cd859 |
children | 12bd2b344b08 |
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/* * Copyright (c) 2011, 2014, 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 com.oracle.graal.hotspot.meta; import static com.oracle.graal.compiler.common.GraalOptions.*; import static com.oracle.graal.hotspot.HotSpotGraalRuntime.*; import static com.oracle.graal.hotspot.meta.HotSpotResolvedObjectTypeImpl.*; import java.lang.annotation.*; import java.lang.reflect.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.*; import com.oracle.graal.hotspot.*; /** * Represents a field in a HotSpot type. */ public class HotSpotResolvedJavaFieldImpl extends CompilerObject implements HotSpotResolvedJavaField, Remote { private static final long serialVersionUID = 7692985878836955683L; private final HotSpotResolvedObjectTypeImpl holder; private final String name; private JavaType type; private final int offset; /** * This value contains all flags as stored in the VM including internal ones. */ private final int modifiers; public HotSpotResolvedJavaFieldImpl(HotSpotResolvedObjectTypeImpl holder, String name, JavaType type, long offset, int modifiers) { this.holder = holder; this.name = name; this.type = type; assert offset != -1; assert offset == (int) offset : "offset larger than int"; this.offset = (int) offset; this.modifiers = modifiers; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj instanceof HotSpotResolvedJavaField) { HotSpotResolvedJavaFieldImpl that = (HotSpotResolvedJavaFieldImpl) obj; return this.holder.equals(that.holder) && this.name.equals(that.name) && this.type.equals(that.type); } return false; } @Override public int hashCode() { return name.hashCode(); } @Override public int getModifiers() { return modifiers & getReflectionFieldModifiers(); } @Override public boolean isInternal() { return (modifiers & runtime().getConfig().jvmAccFieldInternal) != 0; } /** * Determines if a given object contains this field. * * @return true iff this is a non-static field and its declaring class is assignable from * {@code object}'s class */ public boolean isInObject(Object object) { if (isStatic()) { return false; } return getDeclaringClass().isAssignableFrom(HotSpotResolvedObjectTypeImpl.fromObjectClass(object.getClass())); } @Override public HotSpotResolvedObjectTypeImpl getDeclaringClass() { return holder; } @Override public String getName() { return name; } @Override public JavaType getType() { if (!(type instanceof ResolvedJavaType)) { // Don't allow unresolved types to hang around forever ResolvedJavaType resolved = type.resolve(holder); if (resolved != null) { type = resolved; } } return type; } public int offset() { return offset; } @Override public String toString() { return format("HotSpotField<%H.%n %t:") + offset + ">"; } @Override public boolean isSynthetic() { return (runtime().getConfig().syntheticFlag & modifiers) != 0; } /** * Checks if this field has the {@link Stable} annotation. * * @return true if field has {@link Stable} annotation, false otherwise */ public boolean isStable() { if ((runtime().getConfig().jvmAccFieldStable & modifiers) != 0) { return true; } assert getAnnotation(Stable.class) == null; if (ImplicitStableValues.getValue() && isImplicitStableField()) { return true; } return false; } @Override public <T extends Annotation> T getAnnotation(Class<T> annotationClass) { Field javaField = toJava(); if (javaField != null) { return javaField.getAnnotation(annotationClass); } return null; } private Field toJava() { if (isInternal()) { return null; } try { return holder.mirror().getDeclaredField(name); } catch (NoSuchFieldException e) { return null; } } private boolean isArray() { JavaType fieldType = getType(); return fieldType instanceof ResolvedJavaType && ((ResolvedJavaType) fieldType).isArray(); } private boolean isImplicitStableField() { if (isSynthetic()) { if (isSyntheticImplicitStableField()) { return true; } } else if (isWellKnownImplicitStableField()) { return true; } return false; } private boolean isSyntheticImplicitStableField() { assert this.isSynthetic(); if (isStatic() && isArray()) { if (isFinal() && name.equals("$VALUES") || name.equals("ENUM$VALUES")) { // generated int[] field for EnumClass::values() return true; } else if (name.startsWith("$SwitchMap$") || name.startsWith("$SWITCH_TABLE$")) { // javac and ecj generate a static field in an inner class for a switch on an enum // named $SwitchMap$p$k$g$EnumClass and $SWITCH_TABLE$p$k$g$EnumClass, respectively return true; } } return false; } private boolean isWellKnownImplicitStableField() { return WellKnownImplicitStableField.test(this); } static class WellKnownImplicitStableField { /** * @return {@code true} if the field is a well-known stable field. */ public static boolean test(HotSpotResolvedJavaField field) { return field == STRING_VALUE_FIELD; } private static final ResolvedJavaField STRING_VALUE_FIELD; static { try { MetaAccessProvider metaAccess = runtime().getHostProviders().getMetaAccess(); STRING_VALUE_FIELD = metaAccess.lookupJavaField(String.class.getDeclaredField("value")); } catch (SecurityException | NoSuchFieldException e) { throw new GraalInternalError(e); } } } }