1 /*
2 * Copyright (c) 2019, 2022, 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 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_HPP
25 #define SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_HPP
26
27 #include "code/nmethod.hpp"
28 #include "memory/iterator.hpp"
29 #include "oops/accessDecorators.hpp"
30 #include "runtime/handshake.hpp"
31
32 class BarrierSetNMethod;
33 class ShenandoahBarrierSet;
34 class ShenandoahHeap;
35 class ShenandoahMarkingContext;
36 class ShenandoahHeapRegionSet;
37 class Thread;
38 class SATBMarkQueueSet;
39
40 class ShenandoahFlushSATBHandshakeClosure : public HandshakeClosure {
41 private:
42 SATBMarkQueueSet& _qset;
43 public:
44 inline explicit ShenandoahFlushSATBHandshakeClosure(SATBMarkQueueSet& qset);
45 inline void do_thread(Thread* thread) override;
46 };
47
48 class ShenandoahForwardedIsAliveClosure: public BoolObjectClosure {
49 private:
50 ShenandoahMarkingContext* const _mark_context;
51 public:
52 inline ShenandoahForwardedIsAliveClosure();
53 inline bool do_object_b(oop obj);
54 };
55
56 class ShenandoahIsAliveClosure: public BoolObjectClosure {
57 private:
58 ShenandoahMarkingContext* const _mark_context;
59 public:
60 inline ShenandoahIsAliveClosure();
61 inline bool do_object_b(oop obj);
62 };
63
64 class ShenandoahIsAliveSelector : public StackObj {
65 private:
66 ShenandoahIsAliveClosure _alive_cl;
67 ShenandoahForwardedIsAliveClosure _fwd_alive_cl;
68 public:
69 inline BoolObjectClosure* is_alive_closure();
70 };
71
72 class ShenandoahKeepAliveClosure : public OopClosure {
73 private:
74 ShenandoahBarrierSet* const _bs;
75 public:
76 inline ShenandoahKeepAliveClosure();
77 inline void do_oop(oop* p);
78 inline void do_oop(narrowOop* p);
79 private:
80 template <typename T>
81 void do_oop_work(T* p);
82 };
83
84 class ShenandoahOopClosureBase : public MetadataVisitingOopIterateClosure {
85 public:
86 inline void do_nmethod(nmethod* nm);
87 };
88
89 class ShenandoahUpdateRefsClosure: public ShenandoahOopClosureBase {
90 private:
91 ShenandoahHeap* _heap;
92 public:
93 inline ShenandoahUpdateRefsClosure();
94 inline void do_oop(oop* p);
95 inline void do_oop(narrowOop* p);
96 private:
97 template <class T>
98 inline void do_oop_work(T* p);
99 };
100
101 template <bool concurrent, bool stable_thread>
102 class ShenandoahEvacuateUpdateRootClosureBase : public ShenandoahOopClosureBase {
103 protected:
104 ShenandoahHeap* const _heap;
105 Thread* const _thread;
106 public:
107 inline ShenandoahEvacuateUpdateRootClosureBase();
108 inline void do_oop(oop* p);
109 inline void do_oop(narrowOop* p);
110 protected:
111 template <class T>
112 inline void do_oop_work(T* p);
113 };
114
115 using ShenandoahEvacuateUpdateMetadataClosure = ShenandoahEvacuateUpdateRootClosureBase<false, true>;
116 using ShenandoahEvacuateUpdateRootsClosure = ShenandoahEvacuateUpdateRootClosureBase<true, false>;
117 using ShenandoahContextEvacuateUpdateRootsClosure = ShenandoahEvacuateUpdateRootClosureBase<true, true>;
118
119 template <bool CONCURRENT, typename IsAlive, typename KeepAlive>
120 class ShenandoahCleanUpdateWeakOopsClosure : public OopClosure {
121 private:
122 IsAlive* _is_alive;
123 KeepAlive* _keep_alive;
124
125 public:
126 inline ShenandoahCleanUpdateWeakOopsClosure(IsAlive* is_alive, KeepAlive* keep_alive);
127 inline void do_oop(oop* p);
128 inline void do_oop(narrowOop* p);
129 };
130
131 class ShenandoahCodeBlobAndDisarmClosure: public CodeBlobToOopClosure {
132 private:
133 BarrierSetNMethod* const _bs;
134
135 public:
136 inline ShenandoahCodeBlobAndDisarmClosure(OopClosure* cl);
137 inline void do_code_blob(CodeBlob* cb);
138 };
139
140 #ifdef ASSERT
141 class ShenandoahAssertNotForwardedClosure : public OopClosure {
142 private:
143 template <class T>
144 inline void do_oop_work(T* p);
145
146 public:
147 inline void do_oop(narrowOop* p);
148 inline void do_oop(oop* p);
149 };
150 #endif // ASSERT
151
152 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHCLOSURES_HPP