1 /*
2 * Copyright (c) 2015, 2022, 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.
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24 */
25
26 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHOOPCLOSURES_HPP
27 #define SHARE_GC_SHENANDOAH_SHENANDOAHOOPCLOSURES_HPP
28
29 #include "gc/shared/stringdedup/stringDedup.hpp"
30 #include "gc/shenandoah/shenandoahClosures.inline.hpp"
31 #include "gc/shenandoah/shenandoahGenerationType.hpp"
32 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
33 #include "gc/shenandoah/shenandoahTaskqueue.hpp"
34 #include "gc/shenandoah/shenandoahUtils.hpp"
35 #include "memory/iterator.hpp"
36 #include "runtime/javaThread.hpp"
37
38 class ShenandoahMarkRefsSuperClosure : public MetadataVisitingOopIterateClosure {
39 private:
40 ShenandoahObjToScanQueue* _queue;
41 ShenandoahObjToScanQueue* _old_queue;
42 ShenandoahMarkingContext* const _mark_context;
43 bool _weak;
44
45 protected:
46 template <class T, ShenandoahGenerationType GENERATION>
47 void work(T *p);
48
49 public:
50 ShenandoahMarkRefsSuperClosure(ShenandoahObjToScanQueue* q, ShenandoahReferenceProcessor* rp, ShenandoahObjToScanQueue* old_q);
51
52 bool is_weak() const {
53 return _weak;
54 }
55
56 void set_weak(bool weak) {
57 _weak = weak;
58 }
59
60 virtual void do_nmethod(nmethod* nm) {
61 assert(!is_weak(), "Can't handle weak marking of nmethods");
62 nm->run_nmethod_entry_barrier();
63 }
64 };
65
66 class ShenandoahMarkUpdateRefsSuperClosure : public ShenandoahMarkRefsSuperClosure {
67 protected:
68 ShenandoahHeap* const _heap;
69
70 template <class T, ShenandoahGenerationType GENERATION>
71 inline void work(T* p);
72
73 public:
74 ShenandoahMarkUpdateRefsSuperClosure(ShenandoahObjToScanQueue* q, ShenandoahReferenceProcessor* rp, ShenandoahObjToScanQueue* old_q) :
75 ShenandoahMarkRefsSuperClosure(q, rp, old_q),
76 _heap(ShenandoahHeap::heap()) {
77 assert(_heap->is_stw_gc_in_progress(), "Can only be used for STW GC");
78 };
79 };
80
81 template <ShenandoahGenerationType GENERATION>
82 class ShenandoahMarkUpdateRefsClosure : public ShenandoahMarkUpdateRefsSuperClosure {
83 private:
84 template <class T>
85 inline void do_oop_work(T* p) { work<T, GENERATION>(p); }
86
87 public:
88 ShenandoahMarkUpdateRefsClosure(ShenandoahObjToScanQueue* q, ShenandoahReferenceProcessor* rp, ShenandoahObjToScanQueue* old_q) :
89 ShenandoahMarkUpdateRefsSuperClosure(q, rp, old_q) {}
90
91 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
92 virtual void do_oop(oop* p) { do_oop_work(p); }
93 };
94
95 template <ShenandoahGenerationType GENERATION>
96 class ShenandoahMarkRefsClosure : public ShenandoahMarkRefsSuperClosure {
97 private:
98 template <class T>
99 inline void do_oop_work(T* p) { work<T, GENERATION>(p); }
100
101 public:
102 ShenandoahMarkRefsClosure(ShenandoahObjToScanQueue* q, ShenandoahReferenceProcessor* rp, ShenandoahObjToScanQueue* old_q) :
103 ShenandoahMarkRefsSuperClosure(q, rp, old_q) {};
104
105 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
106 virtual void do_oop(oop* p) { do_oop_work(p); }
107 };
108
109 class ShenandoahUpdateRefsSuperClosure : public ShenandoahOopClosureBase {
110 protected:
111 ShenandoahHeap* _heap;
112
113 public:
114 ShenandoahUpdateRefsSuperClosure() : _heap(ShenandoahHeap::heap()) {}
115 };
116
117 class ShenandoahSTWUpdateRefsClosure : public ShenandoahUpdateRefsSuperClosure {
118 private:
119 template<class T>
120 inline void work(T* p);
121
122 public:
123 ShenandoahSTWUpdateRefsClosure() : ShenandoahUpdateRefsSuperClosure() {
124 assert(ShenandoahSafepoint::is_at_shenandoah_safepoint(), "Must only be used at safepoints");
125 }
126
127 virtual void do_oop(narrowOop* p) { work(p); }
128 virtual void do_oop(oop* p) { work(p); }
129 };
130
131 class ShenandoahConcUpdateRefsClosure : public ShenandoahUpdateRefsSuperClosure {
132 private:
133 template<class T>
134 inline void work(T* p);
135
136 public:
137 ShenandoahConcUpdateRefsClosure() : ShenandoahUpdateRefsSuperClosure() {}
138
139 virtual void do_oop(narrowOop* p) { work(p); }
140 virtual void do_oop(oop* p) { work(p); }
141 };
142
143 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHOOPCLOSURES_HPP