1 /* 2 * Copyright (c) 2020, Red Hat, Inc. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "gc/shenandoah/shenandoahConcurrentRoots.hpp" 27 #include "gc/shenandoah/shenandoahIUMode.hpp" 28 #include "gc/shenandoah/heuristics/shenandoahAdaptiveHeuristics.hpp" 29 #include "gc/shenandoah/heuristics/shenandoahAggressiveHeuristics.hpp" 30 #include "gc/shenandoah/heuristics/shenandoahCompactHeuristics.hpp" 31 #include "gc/shenandoah/heuristics/shenandoahStaticHeuristics.hpp" 32 #include "logging/log.hpp" 33 #include "logging/logTag.hpp" 34 35 void ShenandoahIUMode::initialize_flags() const { 36 if (ShenandoahConcurrentRoots::can_do_concurrent_class_unloading()) { 37 FLAG_SET_DEFAULT(ShenandoahSuspendibleWorkers, true); 38 FLAG_SET_DEFAULT(VerifyBeforeExit, false); 39 } 40 41 FLAG_SET_DEFAULT(ShenandoahStoreValEnqueueBarrier, true); 42 FLAG_SET_DEFAULT(ShenandoahSATBBarrier, false); 43 44 SHENANDOAH_ERGO_ENABLE_FLAG(ExplicitGCInvokesConcurrent); 45 SHENANDOAH_ERGO_ENABLE_FLAG(ShenandoahImplicitGCInvokesConcurrent); 46 47 // Final configuration checks 48 SHENANDOAH_CHECK_FLAG_SET(ShenandoahLoadRefBarrier); 49 SHENANDOAH_CHECK_FLAG_SET(ShenandoahStoreValEnqueueBarrier); 50 SHENANDOAH_CHECK_FLAG_SET(ShenandoahCASBarrier); 51 SHENANDOAH_CHECK_FLAG_SET(ShenandoahCloneBarrier); 52 }