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     */
013    package org.vmmagic.pragma;
014    
015    import java.lang.annotation.Retention;
016    import java.lang.annotation.Target;
017    import java.lang.annotation.RetentionPolicy;
018    import java.lang.annotation.ElementType;
019    
020    /**
021     * Use this annotation to mark types that must never move. This is intended for
022     * a very small set of VM internal types that are accessed without knowledge of the
023     * memory manager. This includes code, that is CALLed and fields that are loaded
024     * directly (such as Untraced fields).
025     */
026    @Retention(RetentionPolicy.RUNTIME)
027    @Target(ElementType.TYPE)
028    public @interface NonMoving { }