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