1 /*
2 * Copyright (c) 2017, 2020, 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_VM_OOPS_FLATARRAYKLASS_HPP
26 #define SHARE_VM_OOPS_FLATARRAYKLASS_HPP
27
28 #include "classfile/classLoaderData.hpp"
29 #include "oops/arrayKlass.hpp"
30 #include "oops/inlineKlass.hpp"
31 #include "utilities/macros.hpp"
32
33 /**
34 * Array of inline types, gives a layout of typeArrayOop, but needs oops iterators
35 */
36 class FlatArrayKlass : public ArrayKlass {
37 friend class VMStructs;
38
39 public:
40 static const KlassKind Kind = FlatArrayKlassKind;
41
42 private:
43 // Constructor
44 FlatArrayKlass(Klass* element_klass, Symbol* name);
45
46 public:
47
48 FlatArrayKlass() {}
49
50 virtual InlineKlass* element_klass() const;
51 virtual void set_element_klass(Klass* k);
52
53 // Casting from Klass*
54 static FlatArrayKlass* cast(Klass* k) {
55 assert(k->is_flatArray_klass(), "cast to FlatArrayKlass");
56 return (FlatArrayKlass*) k;
57 }
58
59 // klass allocation
60 static FlatArrayKlass* allocate_klass(Klass* element_klass, TRAPS);
61
62 void initialize(TRAPS);
63
64 ModuleEntry* module() const;
65 PackageEntry* package() const;
66
67 bool can_be_primary_super_slow() const;
68 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots,
69 Array<InstanceKlass*>* transitive_interfaces);
70
71 int element_byte_size() const { return 1 << layout_helper_log2_element_size(_layout_helper); }
72
73 bool is_flatArray_klass_slow() const { return true; }
74
75 bool contains_oops() {
76 return element_klass()->contains_oops();
77 }
78
79 // Override.
80 bool element_access_must_be_atomic() {
81 return element_klass()->must_be_atomic();
82 }
83
84 oop protection_domain() const;
85
86 virtual void metaspace_pointers_do(MetaspaceClosure* iter);
87
88 static jint array_layout_helper(InlineKlass* vklass); // layout helper for values
89
90 // sizing
91 static int header_size() { return sizeof(FlatArrayKlass)/HeapWordSize; }
92 int size() const { return ArrayKlass::static_size(header_size()); }
93
94 jint max_elements() const;
95
96 size_t oop_size(oop obj) const;
97
98 // Oop Allocation
99 flatArrayOop allocate(int length, TRAPS);
100 oop multi_allocate(int rank, jint* sizes, TRAPS);
101
102 // Naming
103 const char* internal_name() const { return external_name(); }
104
105 // Copying
106 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
107
108 // GC specific object visitors
109 //
110 // Mark Sweep
111 int oop_ms_adjust_pointers(oop obj);
112
113
114 template <typename T, typename OopClosureType>
115 inline void oop_oop_iterate(oop obj, OopClosureType* closure);
116
117 template <typename T, typename OopClosureType>
118 inline void oop_oop_iterate_reverse(oop obj, OopClosureType* closure);
119
120 template <typename T, typename OopClosureType>
121 inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);
122
123 template <typename T, class OopClosureType>
124 inline void oop_oop_iterate_elements(flatArrayOop a, OopClosureType* closure);
125
126 private:
127 template <typename T, class OopClosureType>
128 inline void oop_oop_iterate_elements_specialized(flatArrayOop a, OopClosureType* closure);
129
130 template <typename T, class OopClosureType>
131 inline void oop_oop_iterate_elements_bounded(flatArrayOop a, OopClosureType* closure, MemRegion mr);
132
133 template <typename T, class OopClosureType>
134 inline void oop_oop_iterate_elements_specialized_bounded(flatArrayOop a, OopClosureType* closure, void* low, void* high);
135
136 public:
137 jint compute_modifier_flags() const;
138
139 // Printing
140 void print_on(outputStream* st) const;
141 void print_value_on(outputStream* st) const;
142
143 void oop_print_value_on(oop obj, outputStream* st);
144 #ifndef PRODUCT
145 void oop_print_on(oop obj, outputStream* st);
146 #endif
147
148 // Verification
149 void verify_on(outputStream* st);
150 void oop_verify_on(oop obj, outputStream* st);
151 };
152
153 #endif