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annotate src/share/vm/oops/arrayKlass.hpp @ 4724:0841c0ec2ed6
7123810: new hotspot build - hs23-b10
Reviewed-by: jcoomes
author | amurillo |
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date | Fri, 23 Dec 2011 15:29:34 -0800 |
parents | 3582bf76420e |
children | 069ab3f976d3 |
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0 | 1 /* |
2119 | 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 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 #include "oops/klassOop.hpp" | |
31 #include "oops/klassVtable.hpp" | |
32 | |
0 | 33 // arrayKlass is the abstract baseclass for all array classes |
34 | |
35 class arrayKlass: public Klass { | |
36 friend class VMStructs; | |
37 private: | |
38 int _dimension; // This is n'th-dimensional array. | |
2119 | 39 volatile klassOop _higher_dimension; // Refers the (n+1)'th-dimensional array (if present). |
40 volatile klassOop _lower_dimension; // Refers the (n-1)'th-dimensional array (if present). | |
0 | 41 int _vtable_len; // size of vtable for this klass |
42 juint _alloc_size; // allocation profiling support | |
43 oop _component_mirror; // component type, as a java/lang/Class | |
44 | |
45 public: | |
46 // Testing operation | |
47 bool oop_is_array() const { return true; } | |
48 | |
49 // Instance variables | |
50 int dimension() const { return _dimension; } | |
51 void set_dimension(int dimension) { _dimension = dimension; } | |
52 | |
53 klassOop higher_dimension() const { return _higher_dimension; } | |
54 void set_higher_dimension(klassOop k) { oop_store_without_check((oop*) &_higher_dimension, (oop) k); } | |
55 oop* adr_higher_dimension() { return (oop*)&this->_higher_dimension;} | |
56 | |
57 klassOop lower_dimension() const { return _lower_dimension; } | |
58 void set_lower_dimension(klassOop k) { oop_store_without_check((oop*) &_lower_dimension, (oop) k); } | |
59 oop* adr_lower_dimension() { return (oop*)&this->_lower_dimension;} | |
60 | |
61 // Allocation profiling support | |
62 juint alloc_size() const { return _alloc_size; } | |
63 void set_alloc_size(juint n) { _alloc_size = n; } | |
64 | |
65 // offset of first element, including any padding for the sake of alignment | |
66 int array_header_in_bytes() const { return layout_helper_header_size(layout_helper()); } | |
67 int log2_element_size() const { return layout_helper_log2_element_size(layout_helper()); } | |
68 // type of elements (T_OBJECT for both oop arrays and array-arrays) | |
69 BasicType element_type() const { return layout_helper_element_type(layout_helper()); } | |
70 | |
71 oop component_mirror() const { return _component_mirror; } | |
72 void set_component_mirror(oop m) { oop_store((oop*) &_component_mirror, m); } | |
73 oop* adr_component_mirror() { return (oop*)&this->_component_mirror;} | |
74 | |
75 // Compiler/Interpreter offset | |
76 static ByteSize component_mirror_offset() { return byte_offset_of(arrayKlass, _component_mirror); } | |
77 | |
1142 | 78 virtual klassOop java_super() const;//{ return SystemDictionary::Object_klass(); } |
0 | 79 |
80 // Allocation | |
81 // Sizes points to the first dimension of the array, subsequent dimensions | |
82 // are always in higher memory. The callers of these set that up. | |
83 virtual oop multi_allocate(int rank, jint* sizes, TRAPS); | |
84 objArrayOop allocate_arrayArray(int n, int length, TRAPS); | |
85 | |
86 // Lookup operations | |
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87 methodOop uncached_lookup_method(Symbol* name, Symbol* signature) const; |
0 | 88 |
89 // Casting from klassOop | |
90 static arrayKlass* cast(klassOop k) { | |
91 Klass* kp = k->klass_part(); | |
92 assert(kp->null_vtbl() || kp->oop_is_array(), "cast to arrayKlass"); | |
93 return (arrayKlass*) kp; | |
94 } | |
95 | |
96 objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS); | |
97 bool compute_is_subtype_of(klassOop k); | |
98 | |
99 // Sizing | |
100 static int header_size() { return oopDesc::header_size() + sizeof(arrayKlass)/HeapWordSize; } | |
101 int object_size(int header_size) const; | |
102 | |
103 bool object_is_parsable() const { return _vtable_len > 0; } | |
104 | |
105 // Java vtable | |
106 klassVtable* vtable() const; // return new klassVtable | |
107 int vtable_length() const { return _vtable_len; } | |
108 static int base_vtable_length() { return Universe::base_vtable_size(); } | |
109 void set_vtable_length(int len) { assert(len == base_vtable_length(), "bad length"); _vtable_len = len; } | |
110 protected: | |
111 inline intptr_t* start_of_vtable() const; | |
112 | |
113 public: | |
114 // Iterators | |
115 void array_klasses_do(void f(klassOop k)); | |
116 void with_array_klasses_do(void f(klassOop k)); | |
117 | |
118 // Shared creation method | |
119 static arrayKlassHandle base_create_array_klass( | |
120 const Klass_vtbl& vtbl, | |
121 int header_size, KlassHandle klass, | |
122 TRAPS); | |
123 // Return a handle. | |
124 static void complete_create_array_klass(arrayKlassHandle k, KlassHandle super_klass, TRAPS); | |
125 | |
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126 // jvm support |
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127 jint compute_modifier_flags(TRAPS) const; |
0 | 128 |
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129 // JVMTI support |
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130 jint jvmti_class_status() const; |
0 | 131 |
132 // Printing | |
133 void oop_print_on(oop obj, outputStream* st); | |
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134 |
0 | 135 // Verification |
136 void oop_verify_on(oop obj, outputStream* st); | |
137 }; | |
1972 | 138 |
139 #endif // SHARE_VM_OOPS_ARRAYKLASS_HPP |