1 /*
 2  * Copyright (c) 2019, 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_MODE_SHENANDOAHMODE_HPP
26 #define SHARE_GC_SHENANDOAH_MODE_SHENANDOAHMODE_HPP
27 
28 #include "memory/allocation.hpp"
29 #include "runtime/java.hpp"
30 #include "utilities/formatBuffer.hpp"
31 
32 class ShenandoahGeneration;
33 class ShenandoahHeuristics;
34 class ShenandoahOldHeuristics;
35 
36 #define SHENANDOAH_CHECK_FLAG_SET(name)                                     \
37   do {                                                                      \
38     if (!(name)) {                                                          \
39       err_msg message("GC mode needs -XX:+" #name " to work correctly");    \
40       vm_exit_during_initialization("Error", message);                      \
41     }                                                                       \
42   } while (0)
43 
44 #define SHENANDOAH_CHECK_FLAG_UNSET(name)                                   \
45   do {                                                                      \
46     if ((name)) {                                                           \
47       err_msg message("GC mode needs -XX:-" #name " to work correctly");    \
48       vm_exit_during_initialization("Error", message);                      \
49     }                                                                       \
50   } while (0)
51 
52 class ShenandoahMode : public CHeapObj<mtGC> {
53 public:
54   virtual void initialize_flags() const = 0;
55   virtual ShenandoahHeuristics* initialize_heuristics(ShenandoahGeneration* generation) const;
56   virtual const char* name() = 0;
57   virtual bool is_diagnostic() = 0;
58   virtual bool is_experimental() = 0;
59   virtual bool is_generational() { return false; }
60 };
61 
62 #endif // SHARE_GC_SHENANDOAH_MODE_SHENANDOAHMODE_HPP