1 /*
2 * Copyright (c) 1997, 2016, 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_TYPEARRAYKLASS_HPP
26 #define SHARE_VM_OOPS_TYPEARRAYKLASS_HPP
27
28 #include "classfile/classLoaderData.hpp"
29 #include "oops/arrayKlass.hpp"
30
31 // A TypeArrayKlass is the klass of a typeArray
32 // It contains the type and size of the elements
33
34 class TypeArrayKlass : public ArrayKlass {
35 friend class VMStructs;
36 private:
37 jint _max_length; // maximum number of elements allowed in an array
38
39 // Constructor
40 TypeArrayKlass(BasicType type, Symbol* name);
41 static TypeArrayKlass* allocate(ClassLoaderData* loader_data, BasicType type, Symbol* name, TRAPS);
42 public:
43 TypeArrayKlass() {} // For dummy objects.
44
45 // instance variables
46 jint max_length() { return _max_length; }
47 void set_max_length(jint m) { _max_length = m; }
48
49 // testers
50 DEBUG_ONLY(bool is_typeArray_klass_slow() const { return true; })
51
52 // klass allocation
53 static TypeArrayKlass* create_klass(BasicType type, const char* name_str,
54 TRAPS);
55 static inline Klass* create_klass(BasicType type, int scale, TRAPS) {
56 TypeArrayKlass* tak = create_klass(type, external_name(type), CHECK_NULL);
57 assert(scale == (1 << tak->log2_element_size()), "scale must check out");
58 return tak;
59 }
60
61 int oop_size(oop obj) const;
62
63 bool compute_is_subtype_of(Klass* k);
64
65 // Allocation
66 typeArrayOop allocate_common(int length, bool do_zero, TRAPS);
67 typeArrayOop allocate(int length, TRAPS) { return allocate_common(length, true, THREAD); }
68 oop multi_allocate(int rank, jint* sizes, TRAPS);
69
70 oop protection_domain() const { return NULL; }
71
72 // Copying
73 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
74
75 // GC specific object visitors
76 //
77 // Mark Sweep
78 int oop_ms_adjust_pointers(oop obj);
79 #if INCLUDE_ALL_GCS
80 // Parallel Scavenge
81 void oop_ps_push_contents( oop obj, PSPromotionManager* pm);
82 // Parallel Compact
83 void oop_pc_follow_contents(oop obj, ParCompactionManager* cm);
84 void oop_pc_update_pointers(oop obj, ParCompactionManager* cm);
85 #endif
86
87 // Oop iterators. Since there are no oops in TypeArrayKlasses,
88 // these functions only return the size of the object.
89
90 private:
91 // The implementation used by all oop_oop_iterate functions in TypeArrayKlasses.
92 inline void oop_oop_iterate_impl(oop obj, ExtendedOopClosure* closure);
93
94 // Wraps oop_oop_iterate_impl to conform to macros.
95 template <bool nv, typename OopClosureType>
96 inline void oop_oop_iterate(oop obj, OopClosureType* closure);
97
98 // Wraps oop_oop_iterate_impl to conform to macros.
99 template <bool nv, typename OopClosureType>
100 inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);
101
102 public:
103
104 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL)
105 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL)
106 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_RANGE)
107 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_RANGE)
108
109 #if INCLUDE_ALL_GCS
110 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)
111 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)
112 #endif // INCLUDE_ALL_GCS
113
114
115 protected:
116 // Find n'th dimensional array
117 virtual Klass* array_klass_impl(bool or_null, int n, TRAPS);
118
119 // Returns the array class with this class as element type
120 virtual Klass* array_klass_impl(bool or_null, TRAPS);
121
122 public:
123 static TypeArrayKlass* cast(Klass* k) {
124 return const_cast<TypeArrayKlass*>(cast(const_cast<const Klass*>(k)));
125 }
126
127 static const TypeArrayKlass* cast(const Klass* k) {
128 assert(k->is_typeArray_klass(), "cast to TypeArrayKlass");
129 return static_cast<const TypeArrayKlass*>(k);
130 }
131
132 // Naming
133 static const char* external_name(BasicType type);
134
135 // Sizing
136 static int header_size() { return sizeof(TypeArrayKlass)/wordSize; }
137 int size() const { return ArrayKlass::static_size(header_size()); }
138
139 // Initialization (virtual from Klass)
140 void initialize(TRAPS);
141
142 public:
143 // Printing
144 #ifndef PRODUCT
145 void oop_print_on(oop obj, outputStream* st);
146 #endif
147
148 void print_on(outputStream* st) const;
149 void print_value_on(outputStream* st) const;
150
151 public:
152 const char* internal_name() const;
153
154 ModuleEntry* module() const;
155 PackageEntry* package() const;
156 };
157
158 #endif // SHARE_VM_OOPS_TYPEARRAYKLASS_HPP