1 /*
2 * Copyright (c) 1997, 2015, 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_ARRAYKLASS_HPP
26 #define SHARE_VM_OOPS_ARRAYKLASS_HPP
27
28 #include "memory/universe.hpp"
29 #include "oops/klass.hpp"
30
31 class fieldDescriptor;
32 class klassVtable;
33
34 // ArrayKlass is the abstract baseclass for all array classes
35
36 class ArrayKlass: public Klass {
37 friend class VMStructs;
38 private:
39 int _dimension; // This is n'th-dimensional array.
40 Klass* volatile _higher_dimension; // Refers the (n+1)'th-dimensional array (if present).
41 Klass* volatile _lower_dimension; // Refers the (n-1)'th-dimensional array (if present).
42 int _vtable_len; // size of vtable for this klass
43
44 protected:
45 // Constructors
46 // The constructor with the Symbol argument does the real array
47 // initialization, the other is a dummy
48 ArrayKlass(Symbol* name);
49 ArrayKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for cds"); }
50
51 public:
52 // Testing operation
53 DEBUG_ONLY(bool is_array_klass_slow() const { return true; })
54
55 // Instance variables
56 int dimension() const { return _dimension; }
57 void set_dimension(int dimension) { _dimension = dimension; }
58
59 Klass* higher_dimension() const { return _higher_dimension; }
60 void set_higher_dimension(Klass* k) { _higher_dimension = k; }
61 Klass** adr_higher_dimension() { return (Klass**)&this->_higher_dimension;}
62
95 return static_cast<const ArrayKlass*>(k);
96 }
97
98 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots);
99 bool compute_is_subtype_of(Klass* k);
100
101 // Sizing
102 static int header_size() { return sizeof(ArrayKlass)/HeapWordSize; }
103 static int static_size(int header_size);
104
105 #if INCLUDE_SERVICES
106 virtual void collect_statistics(KlassSizeStats *sz) const {
107 Klass::collect_statistics(sz);
108 // Do nothing for now, but remember to modify if you add new
109 // stuff to ArrayKlass.
110 }
111 #endif
112
113 // Java vtable
114 klassVtable* vtable() const; // return new klassVtable
115 int vtable_length() const { return _vtable_len; }
116 static int base_vtable_length() { return Universe::base_vtable_size(); }
117 void set_vtable_length(int len) { assert(len == base_vtable_length(), "bad length"); _vtable_len = len; }
118 protected:
119 inline intptr_t* start_of_vtable() const;
120
121 public:
122 // Iterators
123 void array_klasses_do(void f(Klass* k));
124 void array_klasses_do(void f(Klass* k, TRAPS), TRAPS);
125
126 // Return a handle.
127 static void complete_create_array_klass(ArrayKlass* k, KlassHandle super_klass, TRAPS);
128
129
130 // jvm support
131 jint compute_modifier_flags(TRAPS) const;
132
133 // JVMTI support
134 jint jvmti_class_status() const;
135
136 // CDS support - remove and restore oops from metadata. Oops are not shared.
137 virtual void remove_unshareable_info();
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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_ARRAYKLASS_HPP
26 #define SHARE_VM_OOPS_ARRAYKLASS_HPP
27
28 #include "memory/universe.hpp"
29 #include "oops/klass.hpp"
30
31 class fieldDescriptor;
32 class klassVtable;
33
34 // ArrayKlass is the abstract baseclass for all array classes
35
36 class ArrayKlass: public Klass {
37 friend class VMStructs;
38 private:
39 int _dimension; // This is n'th-dimensional array.
40 Klass* volatile _higher_dimension; // Refers the (n+1)'th-dimensional array (if present).
41 Klass* volatile _lower_dimension; // Refers the (n-1)'th-dimensional array (if present).
42
43 protected:
44 // Constructors
45 // The constructor with the Symbol argument does the real array
46 // initialization, the other is a dummy
47 ArrayKlass(Symbol* name);
48 ArrayKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for cds"); }
49
50 public:
51 // Testing operation
52 DEBUG_ONLY(bool is_array_klass_slow() const { return true; })
53
54 // Instance variables
55 int dimension() const { return _dimension; }
56 void set_dimension(int dimension) { _dimension = dimension; }
57
58 Klass* higher_dimension() const { return _higher_dimension; }
59 void set_higher_dimension(Klass* k) { _higher_dimension = k; }
60 Klass** adr_higher_dimension() { return (Klass**)&this->_higher_dimension;}
61
94 return static_cast<const ArrayKlass*>(k);
95 }
96
97 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots);
98 bool compute_is_subtype_of(Klass* k);
99
100 // Sizing
101 static int header_size() { return sizeof(ArrayKlass)/HeapWordSize; }
102 static int static_size(int header_size);
103
104 #if INCLUDE_SERVICES
105 virtual void collect_statistics(KlassSizeStats *sz) const {
106 Klass::collect_statistics(sz);
107 // Do nothing for now, but remember to modify if you add new
108 // stuff to ArrayKlass.
109 }
110 #endif
111
112 // Java vtable
113 klassVtable* vtable() const; // return new klassVtable
114 protected:
115 inline intptr_t* start_of_vtable() const;
116
117 public:
118 // Iterators
119 void array_klasses_do(void f(Klass* k));
120 void array_klasses_do(void f(Klass* k, TRAPS), TRAPS);
121
122 // Return a handle.
123 static void complete_create_array_klass(ArrayKlass* k, KlassHandle super_klass, TRAPS);
124
125
126 // jvm support
127 jint compute_modifier_flags(TRAPS) const;
128
129 // JVMTI support
130 jint jvmti_class_status() const;
131
132 // CDS support - remove and restore oops from metadata. Oops are not shared.
133 virtual void remove_unshareable_info();
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