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
41 // Constructor
42 ValueArrayKlass(Klass* element_klass, Symbol* name);
43
44 static ValueArrayKlass* allocate_klass(Klass* element_klass, Symbol* name, TRAPS);
45 protected:
46 // Returns the ArrayKlass for n'th dimension.
47 Klass* array_klass_impl(bool or_null, int n, TRAPS);
48
49 // Returns the array class with this class as element type.
50 Klass* array_klass_impl(bool or_null, TRAPS);
51
52 public:
53
54 ValueArrayKlass() {}
55
56 virtual ValueKlass* element_klass() const;
57 virtual void set_element_klass(Klass* k);
58
59 // Casting from Klass*
60 static ValueArrayKlass* cast(Klass* k) {
61 assert(k->is_valueArray_klass(), "cast to ValueArrayKlass");
62 return (ValueArrayKlass*) k;
63 }
64
65 // klass allocation
66 static ValueArrayKlass* allocate_klass(Klass* element_klass, TRAPS);
67
68 void initialize(TRAPS);
69
70 ModuleEntry* module() const;
71 PackageEntry* package() const;
72
73 int element_byte_size() const { return 1 << layout_helper_log2_element_size(_layout_helper); }
74 int element_value_store_size() const { return _element_value_store_size; }
75
76 bool is_valueArray_klass_slow() const { return true; }
77
78 bool contains_oops() {
79 return element_klass()->contains_oops();
80 }
81
82 bool is_atomic() {
83 return element_klass()->is_atomic();
84 }
85
86 oop protection_domain() const;
87
88 static jint array_layout_helper(ValueKlass* vklass); // layout helper for values
89
90 // sizing
91 static int header_size() { return sizeof(ValueArrayKlass)/HeapWordSize; }
92 int size() const { return ArrayKlass::static_size(header_size()); }
93
94 jint max_elements() const;
95
96 int oop_size(oop obj) const;
97
98 // Oop Allocation
99 oop allocate(int length, bool do_zero, 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 #if INCLUDE_ALL_GCS
114 // Parallel Scavenge
115 void oop_ps_push_contents( oop obj, PSPromotionManager* pm);
116 // Parallel Compact
117 void oop_pc_follow_contents(oop obj, ParCompactionManager* cm);
118 void oop_pc_update_pointers(oop obj, ParCompactionManager* cm);
119 #endif
120
121 CMH("Oop iterators. Don't have embedded oops yet, so CMH...")
122
123 private:
124 template <bool nv, typename OopClosureType>
125 inline void oop_oop_iterate(oop obj, OopClosureType* closure);
126 template <bool nv, typename OopClosureType>
127 inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);
128
129 template <bool nv, typename T, class OopClosureType>
130 inline void oop_oop_iterate_elements_specialized(valueArrayOop a, OopClosureType* closure);
131
132 template <bool nv, class OopClosureType>
133 inline void oop_oop_iterate_elements_bounded(valueArrayOop a, OopClosureType* closure, MemRegion mr);
134
135 template <bool nv, typename T, class OopClosureType>
136 inline void oop_oop_iterate_elements_specialized_bounded(valueArrayOop a, OopClosureType* closure, void* low, void* high);
137
138 public:
139 template <bool nv, class OopClosureType>
140 inline void oop_oop_iterate_elements(valueArrayOop a, OopClosureType* closure);
141
142 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL)
143 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL)
144 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_RANGE)
145 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_RANGE)
146
147 #if INCLUDE_ALL_GCS
148 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)
149 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)
150 #endif // INCLUDE_ALL_GCS
151
152 public:
153 // Printing
154 void print_on(outputStream* st) const;
155 void print_value_on(outputStream* st) const;
156
157 void oop_print_value_on(oop obj, outputStream* st);
158 #ifndef PRODUCT
159 void oop_print_on(oop obj, outputStream* st);
160 #endif
161
162 // Verification
163 void verify_on(outputStream* st);
164 void oop_verify_on(oop obj, outputStream* st);
165 };
166
167 #endif
168