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