| /* |
| * Copyright (c) 2021, 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. |
| * |
| */ |
| |
| #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHGC_HPP |
| #define SHARE_GC_SHENANDOAH_SHENANDOAHGC_HPP |
| |
| #include "memory/allocation.hpp" |
| #include "gc/shared/gcCause.hpp" |
| |
| /* |
| * Base class of three Shenandoah GC modes |
| * |
| * The relationship of the GCs: |
| * |
| * ("normal" mode) ----> Concurrent GC ----> (finish) |
| * | |
| * | <upgrade> |
| * v |
| * ("passive" mode) ---> Degenerated GC ---> (finish) |
| * | |
| * | <upgrade> |
| * v |
| * Full GC --------> (finish) |
| */ |
| |
| class ShenandoahGC : public StackObj { |
| public: |
| // Fail point from concurrent GC |
| enum ShenandoahDegenPoint { |
| _degenerated_unset, |
| _degenerated_outside_cycle, |
| _degenerated_mark, |
| _degenerated_evac, |
| _degenerated_updaterefs, |
| _DEGENERATED_LIMIT |
| }; |
| |
| virtual bool collect(GCCause::Cause cause) = 0; |
| static const char* degen_point_to_string(ShenandoahDegenPoint point); |
| |
| protected: |
| static void update_roots(bool full_gc); |
| }; |
| |
| #endif // SHARE_GC_SHENANDOAH_SHENANDOAHGC_HPP |
