Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/ri/HotSpotField.java @ 5540:a891c53a295b
Renaming RiKind => Kind.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 08 Jun 2012 23:47:42 +0200 |
parents | e18ba36bfebc |
children | b4c406861c33 |
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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.ri; import java.lang.annotation.*; import java.lang.reflect.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.api.meta.RiType.*; import com.oracle.graal.compiler.*; import com.oracle.graal.hotspot.*; /** * Represents a field in a HotSpot type. */ public class HotSpotField extends CompilerObject implements RiResolvedField { private static final long serialVersionUID = 7692985878836955683L; private final RiResolvedType holder; private final String name; private final RiType type; private final int offset; private final int accessFlags; private Constant constant; // Constant part only valid for static fields. public HotSpotField(RiResolvedType holder, String name, RiType type, int offset, int accessFlags) { this.holder = holder; this.name = name; this.type = type; assert offset != -1; this.offset = offset; this.accessFlags = accessFlags; } @Override public int accessFlags() { return accessFlags; } @Override public Constant constantValue(Constant receiver) { if (receiver == null) { assert Modifier.isStatic(accessFlags); if (constant == null) { if (holder.isInitialized() && holder.toJava() != System.class) { if (Modifier.isFinal(accessFlags()) || assumeStaticFieldsFinal(holder.toJava())) { Constant encoding = holder.getEncoding(Representation.StaticFields); constant = this.kind().readUnsafeConstant(encoding.asObject(), offset); } } } return constant; } else { assert !Modifier.isStatic(accessFlags); // TODO (chaeubl) HotSpot does not trust final non-static fields (see ciField.cpp) if (Modifier.isFinal(accessFlags())) { return this.kind().readUnsafeConstant(receiver.asObject(), offset); } } return null; } private static boolean assumeStaticFieldsFinal(Class< ? > clazz) { return clazz == GraalOptions.class; } @Override public RiResolvedType holder() { return holder; } @Override public Kind kind() { return type().kind(); } @Override public String name() { return name; } @Override public RiType type() { return type; } public int offset() { return offset; } @Override public String toString() { return "HotSpotField<" + CiUtil.format("%h.%n", this) + ":" + offset + ">"; } @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.toJava().getDeclaredField(name); } catch (NoSuchFieldException e) { return null; } } }