1 /*
2 * Copyright (c) 2021, 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 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHDEGENERATEDGC_HPP
26 #define SHARE_GC_SHENANDOAH_SHENANDOAHDEGENERATEDGC_HPP
27
28 #include "gc/shenandoah/shenandoahGC.hpp"
29
30 class VM_ShenandoahDegeneratedGC;
31
32 class ShenandoahDegenGC : public ShenandoahGC {
33 friend class VM_ShenandoahDegeneratedGC;
34 private:
35 const ShenandoahDegenPoint _degen_point;
36 bool _abbreviated;
37
38 public:
39 ShenandoahDegenGC(ShenandoahDegenPoint degen_point);
40 bool collect(GCCause::Cause cause);
41
42 private:
43 void vmop_degenerated();
44 void entry_degenerated();
45 void op_degenerated();
46
47 void op_reset();
48 void op_mark();
49 void op_finish_mark();
50 void op_prepare_evacuation();
51 void op_cleanup_early();
52
53 void op_evacuate();
54 void op_init_updaterefs();
55 void op_updaterefs();
56 void op_update_roots();
57 void op_cleanup_complete();
58
59 // Fail handling
60 void op_degenerated_futile();
61 void op_degenerated_fail();
62
63 // Turns this degenerated cycle into a full gc without leaving the safepoint
64 void upgrade_to_full();
65
66 const char* degen_event_message(ShenandoahDegenPoint point) const;
67 };
68
69 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHDEGENERATEDGC_HPP
--- EOF ---