1 /*
2 * Copyright (c) 2022, 2023, 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).
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_RUNTIME_CONTINUATIONJAVACLASSES_HPP
26 #define SHARE_RUNTIME_CONTINUATIONJAVACLASSES_HPP
27
28 #include "memory/allStatic.hpp"
29 #include "oops/oopsHierarchy.hpp"
30 #include "utilities/globalDefinitions.hpp"
31 #include "utilities/macros.hpp"
32
33 class SerializeClosure;
34
35 // Interface to jdk.internal.vm.ContinuationScope objects
36 class jdk_internal_vm_ContinuationScope: AllStatic {
37 friend class JavaClasses;
38 private:
39 static int _name_offset;
40
41 static void compute_offsets();
42 public:
43 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
44 };
45
46 // Interface to jdk.internal.vm.Continuation objects
47 class jdk_internal_vm_Continuation: AllStatic {
48 friend class JavaClasses;
49 private:
50 static int _scope_offset;
51 static int _target_offset;
52 static int _parent_offset;
53 static int _yieldInfo_offset;
54 static int _tail_offset;
55 static int _mounted_offset;
56 static int _done_offset;
57 static int _preempted_offset;
58
59 static void compute_offsets();
60 public:
61 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
62 // Accessors
63 static inline oop scope(oop continuation);
64 static inline oop parent(oop continuation);
65 static inline stackChunkOop tail(oop continuation);
66 static inline void set_tail(oop continuation, stackChunkOop value);
67 static inline bool done(oop continuation);
68 static inline bool is_preempted(oop continuation);
69 static inline void set_preempted(oop continuation, bool value);
70 };
71
72 // Interface to jdk.internal.vm.StackChunk objects
73 #define STACKCHUNK_INJECTED_FIELDS(macro) \
74 macro(jdk_internal_vm_StackChunk, cont, continuation_signature, false) \
75 macro(jdk_internal_vm_StackChunk, flags, byte_signature, false) \
76 macro(jdk_internal_vm_StackChunk, pc, intptr_signature, false) \
77 macro(jdk_internal_vm_StackChunk, maxThawingSize, int_signature, false) \
78
79 class jdk_internal_vm_StackChunk: AllStatic {
80 friend class JavaClasses;
81 private:
82 static int _parent_offset;
83 static int _size_offset;
84 static int _sp_offset;
85 static int _pc_offset;
86 static int _argsize_offset;
87 static int _flags_offset;
88 static int _maxThawingSize_offset;
89 static int _cont_offset;
90
91
92 static void compute_offsets();
93 public:
94 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN;
95
96 static inline int parent_offset() { return _parent_offset; }
97 static inline int cont_offset() { return _cont_offset; }
98
99 // Accessors
100 static inline oop parent(oop chunk);
101 static inline void set_parent(oop chunk, oop value);
102 template<typename P>
103 static inline void set_parent_raw(oop chunk, oop value);
104 template<DecoratorSet decorators>
105 static inline void set_parent_access(oop chunk, oop value);
106
107 static inline int size(oop chunk);
108 static inline void set_size(HeapWord* chunk, int value);
109
110 static inline int sp(oop chunk);
111 static inline void set_sp(oop chunk, int value);
112 static inline void set_sp(HeapWord* chunk, int value); // used while allocating
113 static inline address pc(oop chunk);
114 static inline void set_pc(oop chunk, address value);
115 static inline int argsize(oop chunk);
116 static inline void set_argsize(oop chunk, int value);
117 static inline uint8_t flags(oop chunk);
118 static inline void set_flags(oop chunk, uint8_t value);
119 static inline uint8_t flags_acquire(oop chunk);
120 static inline void release_set_flags(oop chunk, uint8_t value);
121 static inline bool try_set_flags(oop chunk, uint8_t expected_value, uint8_t new_value);
122
123 static inline int maxThawingSize(oop chunk);
124 static inline void set_maxThawingSize(oop chunk, int value);
125
126 // cont oop's processing is essential for the chunk's GC protocol
127 static inline oop cont(oop chunk);
128 template<typename P>
129 static inline oop cont_raw(oop chunk);
130 static inline void set_cont(oop chunk, oop value);
131 template<typename P>
132 static inline void set_cont_raw(oop chunk, oop value);
133 template<DecoratorSet decorators>
134 static inline void set_cont_access(oop chunk, oop value);
135 };
136
137 #endif // SHARE_RUNTIME_CONTINUATIONJAVACLASSES_HPP