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annotate src/share/vm/oops/objArrayKlass.hpp @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents b632e80fc9dc
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