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annotate src/share/vm/oops/annotations.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
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children 35431a769282
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6725
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1 /*
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2 * Copyright (c) 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_ANNOTATIONS_HPP
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26 #define SHARE_VM_OOPS_ANNOTATIONS_HPP
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27
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28 #include "oops/metadata.hpp"
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29 #include "runtime/handles.hpp"
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30 #include "utilities/array.hpp"
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31 #include "utilities/exceptions.hpp"
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32 #include "utilities/globalDefinitions.hpp"
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33
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34
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35 class ClassLoaderData;
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36 class outputStream;
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37
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38 typedef Array<u1> AnnotationArray;
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39
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40 // Class to hold the various types of annotations. The only metadata that points
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41 // to this is InstanceKlass.
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42
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43 class Annotations: public MetaspaceObj {
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44
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45 // Annotations for this class, or null if none.
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46 AnnotationArray* _class_annotations;
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47 // Annotation objects (byte arrays) for fields, or null if no annotations.
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48 // Indices correspond to entries (not indices) in fields array.
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49 Array<AnnotationArray*>* _fields_annotations;
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50 // Annotation objects (byte arrays) for methods, or null if no annotations.
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51 // Index is the idnum, which is initially the same as the methods array index.
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52 Array<AnnotationArray*>* _methods_annotations;
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53 // Annotation objects (byte arrays) for methods' parameters, or null if no
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54 // such annotations.
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55 // Index is the idnum, which is initially the same as the methods array index.
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56 Array<AnnotationArray*>* _methods_parameter_annotations;
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57 // Annotation objects (byte arrays) for methods' default values, or null if no
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58 // such annotations.
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59 // Index is the idnum, which is initially the same as the methods array index.
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60 Array<AnnotationArray*>* _methods_default_annotations;
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61
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62 // Constructor where some some values are known to not be null
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63 Annotations(Array<AnnotationArray*>* fa, Array<AnnotationArray*>* ma,
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64 Array<AnnotationArray*>* mpa, Array<AnnotationArray*>* mda) :
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65 _class_annotations(NULL),
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66 _fields_annotations(fa),
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67 _methods_annotations(ma),
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68 _methods_parameter_annotations(mpa),
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69 _methods_default_annotations(mda) {}
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70
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71 public:
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72 // Allocate instance of this class
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73 static Annotations* allocate(ClassLoaderData* loader_data, TRAPS);
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74 static Annotations* allocate(ClassLoaderData* loader_data,
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75 Array<AnnotationArray*>* fa,
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76 Array<AnnotationArray*>* ma,
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77 Array<AnnotationArray*>* mpa,
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78 Array<AnnotationArray*>* mda, TRAPS);
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79 void deallocate_contents(ClassLoaderData* loader_data);
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80 DEBUG_ONLY(bool on_stack() { return false; }) // for template
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81 static int size() { return sizeof(Annotations) / wordSize; }
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82
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83 // Constructor to initialize to null
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84 Annotations() : _class_annotations(NULL), _fields_annotations(NULL),
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85 _methods_annotations(NULL),
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86 _methods_parameter_annotations(NULL),
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87 _methods_default_annotations(NULL) {}
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88
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89 AnnotationArray* class_annotations() const { return _class_annotations; }
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90 Array<AnnotationArray*>* fields_annotations() const { return _fields_annotations; }
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91 Array<AnnotationArray*>* methods_annotations() const { return _methods_annotations; }
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92 Array<AnnotationArray*>* methods_parameter_annotations() const { return _methods_parameter_annotations; }
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93 Array<AnnotationArray*>* methods_default_annotations() const { return _methods_default_annotations; }
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94
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95 void set_class_annotations(AnnotationArray* md) { _class_annotations = md; }
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96 void set_fields_annotations(Array<AnnotationArray*>* md) { _fields_annotations = md; }
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97 void set_methods_annotations(Array<AnnotationArray*>* md) { _methods_annotations = md; }
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98 void set_methods_parameter_annotations(Array<AnnotationArray*>* md) { _methods_parameter_annotations = md; }
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99 void set_methods_default_annotations(Array<AnnotationArray*>* md) { _methods_default_annotations = md; }
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100
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101 // Redefine classes support
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102 AnnotationArray* get_method_annotations_of(int idnum)
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103 { return get_method_annotations_from(idnum, _methods_annotations); }
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104
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105 AnnotationArray* get_method_parameter_annotations_of(int idnum)
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106 { return get_method_annotations_from(idnum, _methods_parameter_annotations); }
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107 AnnotationArray* get_method_default_annotations_of(int idnum)
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108 { return get_method_annotations_from(idnum, _methods_default_annotations); }
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109
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110
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111 void set_method_annotations_of(instanceKlassHandle ik,
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112 int idnum, AnnotationArray* anno, TRAPS) {
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113 set_methods_annotations_of(ik, idnum, anno, &_methods_annotations, THREAD);
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114 }
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115
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116 void set_method_parameter_annotations_of(instanceKlassHandle ik,
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117 int idnum, AnnotationArray* anno, TRAPS) {
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118 set_methods_annotations_of(ik, idnum, anno, &_methods_parameter_annotations, THREAD);
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119 }
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120
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121 void set_method_default_annotations_of(instanceKlassHandle ik,
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122 int idnum, AnnotationArray* anno, TRAPS) {
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123 set_methods_annotations_of(ik, idnum, anno, &_methods_default_annotations, THREAD);
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124 }
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125
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126 // Turn metadata annotations into a Java heap object (oop)
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127 static typeArrayOop make_java_array(AnnotationArray* annotations, TRAPS);
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128
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129 inline AnnotationArray* get_method_annotations_from(int idnum, Array<AnnotationArray*>* annos);
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130 void set_annotations(Array<AnnotationArray*>* md, Array<AnnotationArray*>** md_p) { *md_p = md; }
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131
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132 private:
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133 void set_methods_annotations_of(instanceKlassHandle ik,
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134 int idnum, AnnotationArray* anno,
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135 Array<AnnotationArray*>** md_p, TRAPS);
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136
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137 public:
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138 const char* internal_name() const { return "{constant pool}"; }
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139 #ifndef PRODUCT
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140 void print_on(outputStream* st) const;
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141 #endif
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142 void print_value_on(outputStream* st) const;
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143 };
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144
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145
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146 // For method with idnum get the method's Annotations
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147 inline AnnotationArray* Annotations::get_method_annotations_from(int idnum, Array<AnnotationArray*>* annos) {
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148 if (annos == NULL || annos->length() <= idnum) {
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149 return NULL;
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150 }
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151 return annos->at(idnum);
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152 }
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153 #endif // SHARE_VM_OOPS_ANNOTATIONS_HPP