001/*
002 *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003 *
004 *  This file is licensed to You under the Eclipse Public License (EPL);
005 *  You may not use this file except in compliance with the License. You
006 *  may obtain a copy of the License at
007 *
008 *      http://www.opensource.org/licenses/eclipse-1.0.php
009 *
010 *  See the COPYRIGHT.txt file distributed with this work for information
011 *  regarding copyright ownership.
012 */
013package org.vmmagic.pragma;
014
015import java.lang.annotation.Inherited;
016import java.lang.annotation.Retention;
017import java.lang.annotation.Target;
018import java.lang.annotation.RetentionPolicy;
019import java.lang.annotation.ElementType;
020
021/**
022 * This annotation marks types which have fields that can be marked
023 * as either traced or untraced by the VM.  It disables GC optimizations
024 * that rely on the object pattern remaining static from build time
025 * to execution time.<p>
026 *
027 * The property conferred by this annotation applies to all its subtypes as
028 * well.
029 */
030@Retention(RetentionPolicy.RUNTIME)
031@Target({ElementType.TYPE})
032@Inherited
033public @interface ReferenceFieldsVary { }