1 /*
 2  * Copyright (c) 2019, Red Hat, Inc. All rights reserved.
 3  * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
 4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 5  *
 6  * This code is free software; you can redistribute it and/or modify it
 7  * under the terms of the GNU General Public License version 2 only, as
 8  * published by the Free Software Foundation.
 9  *
10  * This code is distributed in the hope that it will be useful, but WITHOUT
11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13  * version 2 for more details (a copy is included in the LICENSE file that
14  * accompanied this code).
15  *
16  * You should have received a copy of the GNU General Public License version
17  * 2 along with this work; if not, write to the Free Software Foundation,
18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19  *
20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21  * or visit www.oracle.com if you need additional information or have any
22  * questions.
23  *
24  */
25 
26 #ifndef SHARE_GC_SHENANDOAH_MODE_SHENANDOAHMODE_HPP
27 #define SHARE_GC_SHENANDOAH_MODE_SHENANDOAHMODE_HPP
28 
29 #include "gc/shared/gc_globals.hpp"
30 #include "memory/allocation.hpp"
31 #include "runtime/java.hpp"
32 #include "utilities/formatBuffer.hpp"
33 
34 class ShenandoahSpaceInfo;
35 class ShenandoahHeuristics;
36 
37 #define SHENANDOAH_CHECK_FLAG_SET(name)                                     \
38   do {                                                                      \
39     if (!(name)) {                                                          \
40       err_msg message("GC mode needs -XX:+" #name " to work correctly");    \
41       vm_exit_during_initialization("Error", message);                      \
42     }                                                                       \
43   } while (0)
44 
45 #define SHENANDOAH_CHECK_FLAG_UNSET(name)                                   \
46   do {                                                                      \
47     if ((name)) {                                                           \
48       err_msg message("GC mode needs -XX:-" #name " to work correctly");    \
49       vm_exit_during_initialization("Error", message);                      \
50     }                                                                       \
51   } while (0)
52 
53 class ShenandoahMode : public CHeapObj<mtGC> {
54 public:
55   virtual void initialize_flags() const = 0;
56   virtual ShenandoahHeuristics* initialize_heuristics(ShenandoahSpaceInfo* space_info) const;
57   virtual const char* name() = 0;
58   virtual bool is_diagnostic() = 0;
59   virtual bool is_experimental() = 0;
60   virtual bool is_generational() { return false; }
61 };
62 
63 #endif // SHARE_GC_SHENANDOAH_MODE_SHENANDOAHMODE_HPP