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annotate src/share/vm/oops/objArrayKlass.hpp @ 6862:8a5ea0a9ccc4

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7127708: G1: change task num types from int to uint in concurrent mark Summary: Change the type of various task num fields, parameters etc to unsigned and rename them to be more consistent with the other collectors. Code changes were also reviewed by Vitaly Davidovich. Reviewed-by: johnc Contributed-by: Kaushik Srenevasan <kaushik@twitter.com>
author johnc
date Sat, 06 Oct 2012 01:17:44 -0700
parents da91efe96a93
children d8ce2825b193
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1 /*
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_OOPS_OBJARRAYKLASS_HPP
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26 #define SHARE_VM_OOPS_OBJARRAYKLASS_HPP
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27
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28 #include "classfile/classLoaderData.hpp"
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29 #include "memory/specialized_oop_closures.hpp"
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30 #include "oops/arrayKlass.hpp"
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31
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32 // objArrayKlass is the klass for objArrays
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33
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34 class objArrayKlass : public arrayKlass {
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35 friend class VMStructs;
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36 private:
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37 Klass* _element_klass; // The klass of the elements of this array type
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38 Klass* _bottom_klass; // The one-dimensional type (InstanceKlass or typeArrayKlass)
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39
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40 // Constructor
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41 objArrayKlass(int n, KlassHandle element_klass, Symbol* name);
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42 static objArrayKlass* allocate(ClassLoaderData* loader_data, int n, KlassHandle klass_handle, Symbol* name, TRAPS);
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43 public:
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44 // For dummy objects
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45 objArrayKlass() {}
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46
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47 // Instance variables
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48 Klass* element_klass() const { return _element_klass; }
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49 void set_element_klass(Klass* k) { _element_klass = k; }
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50 Klass** element_klass_addr() { return &_element_klass; }
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51
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52 Klass* bottom_klass() const { return _bottom_klass; }
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53 void set_bottom_klass(Klass* k) { _bottom_klass = k; }
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54 Klass** bottom_klass_addr() { return &_bottom_klass; }
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55
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56 // Compiler/Interpreter offset
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57 static ByteSize element_klass_offset() { return in_ByteSize(offset_of(objArrayKlass, _element_klass)); }
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58
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59 // Dispatched operation
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60 bool can_be_primary_super_slow() const;
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61 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots);
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62 bool compute_is_subtype_of(Klass* k);
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63 bool oop_is_objArray_slow() const { return true; }
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64 int oop_size(oop obj) const;
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65
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66 // Allocation
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67 static Klass* allocate_objArray_klass(ClassLoaderData* loader_data,
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68 int n, KlassHandle element_klass, TRAPS);
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69
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70 objArrayOop allocate(int length, TRAPS);
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71 oop multi_allocate(int rank, jint* sizes, TRAPS);
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72
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73 // Copying
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74 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
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75
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76 // Compute protection domain
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77 oop protection_domain() { return Klass::cast(bottom_klass())->protection_domain(); }
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78
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79 private:
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80 // Either oop or narrowOop depending on UseCompressedOops.
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81 // must be called from within objArrayKlass.cpp
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82 template <class T> void do_copy(arrayOop s, T* src, arrayOop d,
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83 T* dst, int length, TRAPS);
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84 protected:
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85 // Returns the objArrayKlass for n'th dimension.
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86 virtual Klass* array_klass_impl(bool or_null, int n, TRAPS);
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87
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88 // Returns the array class with this class as element type.
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89 virtual Klass* array_klass_impl(bool or_null, TRAPS);
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90
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91 public:
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92 // Casting from Klass*
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93 static objArrayKlass* cast(Klass* k) {
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94 assert(k->oop_is_objArray(), "cast to objArrayKlass");
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95 return (objArrayKlass*) k;
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96 }
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97
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98 // Sizing
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99 static int header_size() { return sizeof(objArrayKlass)/HeapWordSize; }
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100 int size() const { return arrayKlass::static_size(header_size()); }
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101
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102 // Initialization (virtual from Klass)
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103 void initialize(TRAPS);
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104
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105 // Garbage collection
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106 void oop_follow_contents(oop obj);
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107 inline void oop_follow_contents(oop obj, int index);
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108 template <class T> inline void objarray_follow_contents(oop obj, int index);
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109
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110 int oop_adjust_pointers(oop obj);
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111
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112 // Parallel Scavenge and Parallel Old
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113 PARALLEL_GC_DECLS
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114 #ifndef SERIALGC
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115 inline void oop_follow_contents(ParCompactionManager* cm, oop obj, int index);
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116 template <class T> inline void
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117 objarray_follow_contents(ParCompactionManager* cm, oop obj, int index);
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118 #endif // !SERIALGC
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119
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120 // Iterators
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121 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
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122 return oop_oop_iterate_v(obj, blk);
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123 }
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124 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {
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125 return oop_oop_iterate_v_m(obj, blk, mr);
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126 }
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127 #define ObjArrayKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
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128 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
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129 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \
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130 MemRegion mr); \
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131 int oop_oop_iterate_range##nv_suffix(oop obj, OopClosureType* blk, \
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132 int start, int end);
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133
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134 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DECL)
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135 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DECL)
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136
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137 // JVM support
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138 jint compute_modifier_flags(TRAPS) const;
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139
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140 public:
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141 // Printing
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142 void print_on(outputStream* st) const;
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143 void print_value_on(outputStream* st) const;
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144
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145 void oop_print_value_on(oop obj, outputStream* st);
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146 #ifndef PRODUCT
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147 void oop_print_on (oop obj, outputStream* st);
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148 #endif //PRODUCT
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149
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150 const char* internal_name() const;
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151
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152 // Verification
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153 void verify_on(outputStream* st);
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154
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155 void oop_verify_on(oop obj, outputStream* st);
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156 };
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157
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158 #endif // SHARE_VM_OOPS_OBJARRAYKLASS_HPP