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.
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23 */
24
25 #ifndef SHARE_VM_OOPS_OBJARRAYKLASS_HPP
26 #define SHARE_VM_OOPS_OBJARRAYKLASS_HPP
27
28 #include "classfile/classLoaderData.hpp"
29 #include "oops/arrayKlass.hpp"
30 #include "utilities/macros.hpp"
31
32 // ObjArrayKlass is the klass for objArrays
33
34 class ObjArrayKlass : public ArrayKlass {
35 friend class VMStructs;
36 friend class JVMCIVMStructs;
37 private:
38 Klass* _element_klass; // The klass of the elements of this array type
39 Klass* _bottom_klass; // The one-dimensional type (InstanceKlass or TypeArrayKlass)
40
41 // Constructor
42 ObjArrayKlass(int n, KlassHandle element_klass, Symbol* name);
43 static ObjArrayKlass* allocate(ClassLoaderData* loader_data, int n, KlassHandle klass_handle, Symbol* name, TRAPS);
44 public:
45 // For dummy objects
46 ObjArrayKlass() {}
47
48 // Instance variables
49 Klass* element_klass() const { return _element_klass; }
50 void set_element_klass(Klass* k) { _element_klass = k; }
51 Klass** element_klass_addr() { return &_element_klass; }
52
53 Klass* bottom_klass() const { return _bottom_klass; }
54 void set_bottom_klass(Klass* k) { _bottom_klass = k; }
55 Klass** bottom_klass_addr() { return &_bottom_klass; }
56
57 // Compiler/Interpreter offset
58 static ByteSize element_klass_offset() { return in_ByteSize(offset_of(ObjArrayKlass, _element_klass)); }
59
60 // Dispatched operation
61 bool can_be_primary_super_slow() const;
62 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots);
63 bool compute_is_subtype_of(Klass* k);
64 DEBUG_ONLY(bool is_objArray_klass_slow() const { return true; })
65 int oop_size(oop obj) const;
66
67 // Allocation
68 static Klass* allocate_objArray_klass(ClassLoaderData* loader_data,
69 int n, KlassHandle element_klass, TRAPS);
70
71 objArrayOop allocate(int length, TRAPS);
72 oop multi_allocate(int rank, jint* sizes, TRAPS);
73
74 // Copying
75 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
76
77 // Compute protection domain
78 oop protection_domain() const { return bottom_klass()->protection_domain(); }
79
80 private:
81 // Either oop or narrowOop depending on UseCompressedOops.
82 // must be called from within ObjArrayKlass.cpp
83 template <class T> void do_copy(arrayOop s, T* src, arrayOop d,
84 T* dst, int length, TRAPS);
85 protected:
86 // Returns the ObjArrayKlass for n'th dimension.
87 virtual Klass* array_klass_impl(bool or_null, int n, TRAPS);
88
89 // Returns the array class with this class as element type.
90 virtual Klass* array_klass_impl(bool or_null, TRAPS);
91
92 public:
93
94 static ObjArrayKlass* cast(Klass* k) {
95 return const_cast<ObjArrayKlass*>(cast(const_cast<const Klass*>(k)));
96 }
97
98 static const ObjArrayKlass* cast(const Klass* k) {
99 assert(k->is_objArray_klass(), "cast to ObjArrayKlass");
100 return static_cast<const ObjArrayKlass*>(k);
101 }
102
103 // Sizing
104 static int header_size() { return sizeof(ObjArrayKlass)/wordSize; }
105 int size() const { return ArrayKlass::static_size(header_size()); }
106
107 // Initialization (virtual from Klass)
108 void initialize(TRAPS);
109
110 // GC specific object visitors
111 //
112 // Mark Sweep
113 int oop_ms_adjust_pointers(oop obj);
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 // Oop fields (and metadata) iterators
123 // [nv = true] Use non-virtual calls to do_oop_nv.
124 // [nv = false] Use virtual calls to do_oop.
125 //
126 // The ObjArrayKlass iterators also visits the Object's klass.
127
128 private:
129
130 // Iterate over oop elements and metadata.
131 template <bool nv, typename OopClosureType>
132 inline void oop_oop_iterate(oop obj, OopClosureType* closure);
133
134 // Iterate over oop elements within mr, and metadata.
135 template <bool nv, typename OopClosureType>
136 inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);
137
138 // Iterate over oop elements with indices within [start, end), and metadata.
139 template <bool nv, class OopClosureType>
140 inline void oop_oop_iterate_range(oop obj, OopClosureType* closure, int start, int end);
141
142 // Iterate over oop elements within [start, end), and metadata.
143 // Specialized for [T = oop] or [T = narrowOop].
144 template <bool nv, typename T, class OopClosureType>
145 inline void oop_oop_iterate_range_specialized(objArrayOop a, OopClosureType* closure, int start, int end);
146
147 public:
148 // Iterate over all oop elements.
149 template <bool nv, class OopClosureType>
150 inline void oop_oop_iterate_elements(objArrayOop a, OopClosureType* closure);
151
152 private:
153 // Iterate over all oop elements.
154 // Specialized for [T = oop] or [T = narrowOop].
155 template <bool nv, typename T, class OopClosureType>
156 inline void oop_oop_iterate_elements_specialized(objArrayOop a, OopClosureType* closure);
157
158 // Iterate over all oop elements with indices within mr.
159 template <bool nv, class OopClosureType>
160 inline void oop_oop_iterate_elements_bounded(objArrayOop a, OopClosureType* closure, MemRegion mr);
161
162 // Iterate over oop elements within [low, high)..
163 // Specialized for [T = oop] or [T = narrowOop].
164 template <bool nv, typename T, class OopClosureType>
165 inline void oop_oop_iterate_elements_specialized_bounded(objArrayOop a, OopClosureType* closure, void* low, void* high);
166
167
168 public:
169
170 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL)
171 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL)
172 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_RANGE)
173 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_RANGE)
174
175 #if INCLUDE_ALL_GCS
176 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)
177 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)
178 #endif // INCLUDE_ALL_GCS
179
180 // JVM support
181 jint compute_modifier_flags(TRAPS) const;
182
183 public:
184 // Printing
185 void print_on(outputStream* st) const;
186 void print_value_on(outputStream* st) const;
187
188 void oop_print_value_on(oop obj, outputStream* st);
189 #ifndef PRODUCT
190 void oop_print_on (oop obj, outputStream* st);
191 #endif //PRODUCT
192
193 const char* internal_name() const;
194
195 // Verification
196 void verify_on(outputStream* st);
197
198 void oop_verify_on(oop obj, outputStream* st);
199 };
200
201 #endif // SHARE_VM_OOPS_OBJARRAYKLASS_HPP
--- EOF ---