Mercurial > hg > graal-compiler
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotResolvedJavaField.java @ 9984:f3330a4487eb
added ResolvedJava[Field|Method].isSynthetic()
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 11 Jun 2013 01:17:10 +0200 |
parents | 84890660eefb |
children | 56fc40ca4ae0 |
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/* * Copyright (c) 2011, 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.api.meta.MetaUtil.*; import static com.oracle.graal.hotspot.HotSpotGraalRuntime.*; import java.lang.annotation.*; import java.lang.reflect.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.hotspot.*; import com.oracle.graal.options.*; import com.oracle.graal.replacements.*; /** * Represents a field in a HotSpot type. */ public class HotSpotResolvedJavaField extends CompilerObject implements ResolvedJavaField, LocationIdentity { // Must not conflict with any fields flags used by the VM - the assertion in the constructor // checks this assumption private static final int FIELD_INTERNAL_FLAG = 0x80000000; private static final long serialVersionUID = 7692985878836955683L; private final HotSpotResolvedObjectType holder; private final String name; private final JavaType type; private final int offset; private final int flags; private Constant constant; public HotSpotResolvedJavaField(HotSpotResolvedObjectType holder, String name, JavaType type, int offset, int flags, boolean internal) { assert (flags & FIELD_INTERNAL_FLAG) == 0; this.holder = holder; this.name = name; this.type = type; assert offset != -1; this.offset = offset; if (internal) { this.flags = flags | FIELD_INTERNAL_FLAG; } else { this.flags = flags; } } @Override public int getModifiers() { return flags & Modifier.fieldModifiers(); } @Override public boolean isInternal() { return (flags & FIELD_INTERNAL_FLAG) != 0; } private static final String SystemClassName = MetaUtil.toInternalName(System.class.getName()); @Override public Constant readConstantValue(Constant receiver) { if (receiver == null) { assert Modifier.isStatic(flags); if (constant == null) { if (holder.isInitialized() && !holder.getName().equals(SystemClassName)) { if (Modifier.isFinal(getModifiers())) { constant = readValue(receiver); } } } return constant; } else { /* * for non-static final fields, we must assume that they are only initialized if they * have a non-default value. */ assert !Modifier.isStatic(flags); Object object = receiver.asObject(); if (Modifier.isFinal(getModifiers())) { Constant value = readValue(receiver); if (assumeNonStaticFinalFieldsAsFinal(object.getClass()) || !value.isDefaultForKind()) { return value; } } else { Class<?> clazz = object.getClass(); if (StableOptionValue.class.isAssignableFrom(clazz)) { StableOptionValue<?> option = (StableOptionValue<?>) object; return Constant.forObject(option.getValue()); } } } return null; } @Override public Constant readValue(Constant receiver) { if (receiver == null) { assert Modifier.isStatic(flags); if (holder.isInitialized()) { return graalRuntime().getRuntime().readUnsafeConstant(getKind(), holder.mirror(), offset); } return null; } else { assert !Modifier.isStatic(flags); return graalRuntime().getRuntime().readUnsafeConstant(getKind(), receiver.asObject(), offset); } } private static boolean assumeNonStaticFinalFieldsAsFinal(Class<?> clazz) { return clazz == SnippetCounter.class; } @Override public HotSpotResolvedObjectType getDeclaringClass() { return holder; } @Override public Kind getKind() { return getType().getKind(); } @Override public String getName() { return name; } @Override public JavaType getType() { return type; } public int offset() { return offset; } @Override public String toString() { return format("HotSpotField<%H.%n %t:", this) + offset + ">"; } @Override public boolean isSynthetic() { Field javaField = toJava(); if (javaField != null) { return javaField.isSynthetic(); } 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() { try { return holder.mirror().getDeclaredField(name); } catch (NoSuchFieldException e) { return null; } } }