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
39 public:
40 static const KlassID ID = ValueArrayKlassID;
41
42 private:
43 // Constructor
44 ValueArrayKlass(Klass* element_klass, Symbol* name);
45
46 static ValueArrayKlass* allocate_klass(Klass* element_klass, TRAPS);
47 protected:
48 // Returns the ArrayKlass for n'th dimension.
49 Klass* array_klass_impl(ArrayStorageProperties storage_props, bool or_null, int n, TRAPS);
50
51 // Returns the array class with this class as element type.
52 Klass* array_klass_impl(ArrayStorageProperties storage_props, bool or_null, TRAPS);
53
54 public:
55
56 ValueArrayKlass() {}
57
58 // Properties of an LWorld (LW2) flattened array
59 ArrayStorageProperties storage_properties() { return ArrayStorageProperties::flattened_and_null_free; }
60
61 virtual ValueKlass* element_klass() const;
62 virtual void set_element_klass(Klass* k);
63
64 // Casting from Klass*
65 static ValueArrayKlass* cast(Klass* k) {
66 assert(k->is_valueArray_klass(), "cast to ValueArrayKlass");
67 return (ValueArrayKlass*) k;
68 }
69
70 // klass allocation
71 static ValueArrayKlass* allocate_klass(ArrayStorageProperties storage_props, Klass* element_klass, TRAPS);
72
73 void initialize(TRAPS);
74
75 ModuleEntry* module() const;
76 PackageEntry* package() const;
77
78 bool can_be_primary_super_slow() const;
79 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots,
80 Array<InstanceKlass*>* transitive_interfaces);
81
82 int element_byte_size() const { return 1 << layout_helper_log2_element_size(_layout_helper); }
83
84 bool is_valueArray_klass_slow() const { return true; }
85
86 bool contains_oops() {
87 return element_klass()->contains_oops();
88 }
89
90 // Override.
91 bool element_access_is_atomic() {
92 return element_klass()->is_atomic();
93 }
94
95 oop protection_domain() const;
96
97 static jint array_layout_helper(ValueKlass* vklass); // layout helper for values
98
99 // sizing
100 static int header_size() { return sizeof(ValueArrayKlass)/HeapWordSize; }
101 int size() const { return ArrayKlass::static_size(header_size()); }
102
103 jint max_elements() const;
104
105 int oop_size(oop obj) const;
106
107 // Oop Allocation
108 valueArrayOop allocate(int length, TRAPS);
109 oop multi_allocate(int rank, jint* sizes, TRAPS);
110
111 // Naming
112 const char* internal_name() const { return external_name(); }
113
114 // Copying
115 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
116
117 // GC specific object visitors
118 //
119 // Mark Sweep
120 int oop_ms_adjust_pointers(oop obj);
121
122
123 template <typename T, typename OopClosureType>
124 inline void oop_oop_iterate(oop obj, OopClosureType* closure);
125
126 template <typename T, typename OopClosureType>
127 inline void oop_oop_iterate_reverse(oop obj, OopClosureType* closure);
128
129 template <typename T, typename OopClosureType>
130 inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);
131
132 template <typename T, class OopClosureType>
133 inline void oop_oop_iterate_elements(valueArrayOop a, OopClosureType* closure);
134
135 private:
136 template <typename T, class OopClosureType>
137 inline void oop_oop_iterate_elements_specialized(valueArrayOop a, OopClosureType* closure);
138
139 template <typename T, class OopClosureType>
140 inline void oop_oop_iterate_elements_bounded(valueArrayOop a, OopClosureType* closure, MemRegion mr);
141
142 template <typename T, class OopClosureType>
143 inline void oop_oop_iterate_elements_specialized_bounded(valueArrayOop a, OopClosureType* closure, void* low, void* high);
144
145 public:
146 // Printing
147 void print_on(outputStream* st) const;
148 void print_value_on(outputStream* st) const;
149
150 void oop_print_value_on(oop obj, outputStream* st);
151 #ifndef PRODUCT
152 void oop_print_on(oop obj, outputStream* st);
153 #endif
154
155 // Verification
156 void verify_on(outputStream* st);
157 void oop_verify_on(oop obj, outputStream* st);
158 };
159
160 #endif
161