1 /*
2 * Copyright (c) 2017, 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_VALUEARRAYKLASS_HPP
26 #define SHARE_VM_OOPS_VALUEARRAYKLASS_HPP
27
28 #include "classfile/classLoaderData.hpp"
29 #include "oops/arrayKlass.hpp"
30 #include "oops/valueKlass.hpp"
31 #include "utilities/macros.hpp"
32
33 /**
34 * Array of values, gives a layout of typeArrayOop, but needs oops iterators
35 */
36 class ValueArrayKlass : public ArrayKlass {
37 friend class VMStructs;
38 private:
39 int _element_value_store_size; // pow2 addressing, limit value store copy size
40 ValueKlass* _element_klass; // The klass of the elements of this array type
41
42 // Constructor
43 ValueArrayKlass(Klass* element_klass, Symbol* name);
44 void set_element_klass(ValueKlass* k);
45
46 static ValueArrayKlass* allocate_klass(Klass* element_klass, Symbol* name, TRAPS);
47 protected:
48 // Returns the ArrayKlass for n'th dimension.
49 Klass* array_klass_impl(bool or_null, int n, TRAPS);
50
51 // Returns the array class with this class as element type.
52 Klass* array_klass_impl(bool or_null, TRAPS);
53
54 public:
55
56 ValueArrayKlass() {}
57
58 // Casting from Klass*
59 static ValueArrayKlass* cast(Klass* k) {
60 assert(k->is_valueArray_klass(), "cast to ValueArrayKlass");
61 return (ValueArrayKlass*) k;
62 }
63
64 // klass allocation
65 static ValueArrayKlass* allocate_klass(Klass* element_klass, TRAPS);
66
67 void initialize(TRAPS);
68
69 // Instance variables
70 ValueKlass* element_klass() const { return _element_klass; }
71 ValueKlass** element_klass_addr() { return &_element_klass; }
72
73 ModuleEntry* module() const;
74 PackageEntry* package() const;
75
76 int element_byte_size() const { return 1 << layout_helper_log2_element_size(_layout_helper); }
77 int element_value_store_size() const { return _element_value_store_size; }
78
79 bool is_valueArray_klass_slow() const { return true; }
80
81 bool contains_oops() { return element_klass()->contains_oops(); }
82 bool is_atomic() { return element_klass()->is_atomic(); }
83
84 oop protection_domain() const;
85
86 static jint array_layout_helper(ValueKlass* vklass); // layout helper for values
87
88 // sizing
89 static int header_size() { return sizeof(ValueArrayKlass)/HeapWordSize; }
90 int size() const { return ArrayKlass::static_size(header_size()); }
91
92 jint max_elements() const;
93
94 int oop_size(oop obj) const;
95
96 // Oop Allocation
97 oop allocate(int length, bool do_zero, TRAPS);
98 oop multi_allocate(int rank, jint* sizes, TRAPS);
99
100 // Naming
101 const char* internal_name() const { return external_name(); }
102
103 // Copying
104 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
105
106 // Compiler/Interpreter offset
107 static ByteSize element_klass_offset() { return in_ByteSize(offset_of(ValueArrayKlass, _element_klass)); }
108
109 // GC specific object visitors
110 //
111 // Mark Sweep
112 int oop_ms_adjust_pointers(oop obj);
113
114 #if INCLUDE_ALL_GCS
115 // Parallel Scavenge
116 void oop_ps_push_contents( oop obj, PSPromotionManager* pm);
117 // Parallel Compact
118 void oop_pc_follow_contents(oop obj, ParCompactionManager* cm);
119 void oop_pc_update_pointers(oop obj, ParCompactionManager* cm);
120 #endif
121
122 CMH("Oop iterators. Don't have embedded oops yet, so CMH...")
123
124 private:
125 template <bool nv, typename OopClosureType>
126 inline void oop_oop_iterate(oop obj, OopClosureType* closure);
127 template <bool nv, typename OopClosureType>
128 inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);
129
130 template <bool nv, typename T, class OopClosureType>
131 inline void oop_oop_iterate_elements_specialized(valueArrayOop a, OopClosureType* closure);
132
133 template <bool nv, class OopClosureType>
134 inline void oop_oop_iterate_elements_bounded(valueArrayOop a, OopClosureType* closure, MemRegion mr);
135
136 template <bool nv, typename T, class OopClosureType>
137 inline void oop_oop_iterate_elements_specialized_bounded(valueArrayOop a, OopClosureType* closure, void* low, void* high);
138
139 public:
140 template <bool nv, class OopClosureType>
141 inline void oop_oop_iterate_elements(valueArrayOop a, OopClosureType* closure);
142
143 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL)
144 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL)
145 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_RANGE)
146 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_RANGE)
147
148 #if INCLUDE_ALL_GCS
149 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)
150 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)
151 #endif // INCLUDE_ALL_GCS
152
153 public:
154 // Printing
155 void print_on(outputStream* st) const;
156 void print_value_on(outputStream* st) const;
157
158 void oop_print_value_on(oop obj, outputStream* st);
159 #ifndef PRODUCT
160 void oop_print_on(oop obj, outputStream* st);
161 #endif
162
163 // Verification
164 void verify_on(outputStream* st);
165 void oop_verify_on(oop obj, outputStream* st);
166 };
167
168 #endif
169