vmkit/mmtk/java/src/org/vmmagic/pragma/Untraced.java

/*
 *  This file is part of the Jikes RVM project (http://jikesrvm.org).
 *
 *  This file is licensed to You under the Common Public License (CPL);
 *  You may not use this file except in compliance with the License. You
 *  may obtain a copy of the License at
 *
 *      http://www.opensource.org/licenses/cpl1.0.php
 *
 *  See the COPYRIGHT.txt file distributed with this work for information
 *  regarding copyright ownership.
 */
package org.vmmagic.pragma;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.ElementType;

/**
 * Use this annotation to mark fields that are read without the knowledge of the
 * memory management system. This means that barriers are not triggered and
 * the reference is also not traced by the garbage collector.
 *
 * As annotations are loaded at class resolution time, fields marked with this
 * annotation must be private so that no unresolved accesses are compiled to them with
 * barriers.
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD)
public @interface Untraced { }