1 /*
 2  * Copyright (c) 2024, Oracle and/or its affiliates. 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).
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15  * You should have received a copy of the GNU General Public License version
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24 
25 #ifndef SHARE_OOPS_RECOMPILATION_SCHEDULE_HPP
26 #define SHARE_OOPS_RECOMPILATION_SCHEDULE_HPP
27 
28 #include "cds/serializeClosure.hpp"
29 #include "memory/allStatic.hpp"
30 #include "memory/metaspaceClosure.hpp"
31 #include "oops/array.hpp"
32 #include "oops/trainingData.hpp"
33 #include "runtime/atomicAccess.hpp"
34 #include "utilities/exceptions.hpp"
35 #include "utilities/macros.hpp"
36 #include "utilities/ostream.hpp"
37 
38 class RecompilationSchedule : public AllStatic {
39   static Array<MethodTrainingData*>* _schedule;
40   static Array<MethodTrainingData*>* _schedule_for_dumping;
41   static volatile bool* _status;
42 public:
43   static void initialize();
44   static void prepare(TRAPS);
45   static bool have_schedule() { return _schedule != nullptr; }
46   static Array<MethodTrainingData*>* schedule() { return _schedule; }
47   static int length() {
48     return have_schedule() ? _schedule->length() : 0;
49   }
50   static MethodTrainingData* at(int i) {
51     assert(i < length(), "");
52     return schedule()->at(i);
53   }
54   static volatile bool* status() { return _status; }
55   static volatile bool* status_adr_at(int i) {
56     assert(i < length(), "");
57     return &_status[i];
58   }
59   static bool status_at(int i) {
60     return AtomicAccess::load_acquire(status_adr_at(i));
61   }
62   static void set_status_at(int i, bool value) {
63     AtomicAccess::release_store(RecompilationSchedule::status_adr_at(i), value);
64   }
65   static bool claim_at(int i) {
66     return AtomicAccess::cmpxchg(RecompilationSchedule::status_adr_at(i), false, true) == false;
67   }
68 #if INCLUDE_CDS
69   static void iterate_roots(MetaspaceClosure* it);
70   static void cleanup();
71   static void serialize(SerializeClosure* soc);
72   static void print_archived_training_data_on(outputStream* st);
73 #endif
74 };
75 
76 #endif // SHARE_OOPS_RECOMPILATION_SCHEDULE_HPP