| /* |
| * Copyright (c) 2020, Red Hat, Inc. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "gc/shenandoah/shenandoahConcurrentRoots.hpp" |
| #include "gc/shenandoah/heuristics/shenandoahAdaptiveHeuristics.hpp" |
| #include "gc/shenandoah/heuristics/shenandoahAggressiveHeuristics.hpp" |
| #include "gc/shenandoah/heuristics/shenandoahCompactHeuristics.hpp" |
| #include "gc/shenandoah/heuristics/shenandoahStaticHeuristics.hpp" |
| #include "gc/shenandoah/mode/shenandoahIUMode.hpp" |
| #include "logging/log.hpp" |
| #include "logging/logTag.hpp" |
| #include "runtime/globals_extension.hpp" |
| #include "runtime/java.hpp" |
| |
| void ShenandoahIUMode::initialize_flags() const { |
| if (ShenandoahConcurrentRoots::can_do_concurrent_class_unloading()) { |
| FLAG_SET_DEFAULT(ShenandoahSuspendibleWorkers, true); |
| FLAG_SET_DEFAULT(VerifyBeforeExit, false); |
| } |
| |
| if (FLAG_IS_DEFAULT(ShenandoahStoreValEnqueueBarrier)) { |
| FLAG_SET_DEFAULT(ShenandoahStoreValEnqueueBarrier, true); |
| } |
| if (FLAG_IS_DEFAULT(ShenandoahSATBBarrier)) { |
| FLAG_SET_DEFAULT(ShenandoahSATBBarrier, false); |
| } |
| |
| SHENANDOAH_ERGO_ENABLE_FLAG(ExplicitGCInvokesConcurrent); |
| SHENANDOAH_ERGO_ENABLE_FLAG(ShenandoahImplicitGCInvokesConcurrent); |
| |
| // Final configuration checks |
| SHENANDOAH_CHECK_FLAG_SET(ShenandoahLoadRefBarrier); |
| SHENANDOAH_CHECK_FLAG_UNSET(ShenandoahSATBBarrier); |
| SHENANDOAH_CHECK_FLAG_SET(ShenandoahStoreValEnqueueBarrier); |
| SHENANDOAH_CHECK_FLAG_SET(ShenandoahCASBarrier); |
| SHENANDOAH_CHECK_FLAG_SET(ShenandoahCloneBarrier); |
| } |
| |
| ShenandoahHeuristics* ShenandoahIUMode::initialize_heuristics() const { |
| if (ShenandoahGCHeuristics != NULL) { |
| if (strcmp(ShenandoahGCHeuristics, "aggressive") == 0) { |
| return new ShenandoahAggressiveHeuristics(); |
| } else if (strcmp(ShenandoahGCHeuristics, "static") == 0) { |
| return new ShenandoahStaticHeuristics(); |
| } else if (strcmp(ShenandoahGCHeuristics, "adaptive") == 0) { |
| return new ShenandoahAdaptiveHeuristics(); |
| } else if (strcmp(ShenandoahGCHeuristics, "compact") == 0) { |
| return new ShenandoahCompactHeuristics(); |
| } else { |
| vm_exit_during_initialization("Unknown -XX:ShenandoahGCHeuristics option"); |
| } |
| } |
| ShouldNotReachHere(); |
| return NULL; |
| } |