/* * This file is part of the Jikes RVM project (http://jikesrvm.org). * * This file is licensed to You under the Eclipse Public License (EPL); * 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/eclipse-1.0.php * * See the COPYRIGHT.txt file distributed with this work for information * regarding copyright ownership. */ package org.mmtk.utility.options; import org.mmtk.vm.VM; /** * Option to enable an optimization that only scans the part of the stack that has changed since the last GC. */ public final class UseShortStackScans extends org.vmutil.options.BooleanOption { /** * Create the option. */ public UseShortStackScans() { super(Options.set, "Use Short Stack Scans", "Use optimization that only scans the part of the stack that has changed since last GC?", false); } @Override protected void validate() { if (!VM.scanning.supportsReturnBarrier() && value) fail("Use of short stack scans only implemented on IA32 32-bit"); } }