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1 /* |
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2 * Copyright (c) 1999, 2013, 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_CI_CIOBJECTFACTORY_HPP |
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26 #define SHARE_VM_CI_CIOBJECTFACTORY_HPP |
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27 |
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28 #include "ci/ciClassList.hpp" |
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29 #include "ci/ciObject.hpp" |
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30 #include "utilities/growableArray.hpp" |
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31 |
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32 // ciObjectFactory |
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33 // |
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34 // This class handles requests for the creation of new instances |
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35 // of ciObject and its subclasses. It contains a caching mechanism |
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36 // which ensures that for each oop, at most one ciObject is created. |
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37 // This invariant allows efficient implementation of ciObject. |
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38 class ciObjectFactory : public ResourceObj { |
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39 friend class VMStructs; |
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40 friend class ciEnv; |
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41 |
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42 private: |
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43 static volatile bool _initialized; |
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44 static GrowableArray<ciMetadata*>* _shared_ci_metadata; |
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45 static ciSymbol* _shared_ci_symbols[]; |
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46 static int _shared_ident_limit; |
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47 |
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48 Arena* _arena; |
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49 GrowableArray<ciMetadata*>* _ci_metadata; |
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50 GrowableArray<ciMethod*>* _unloaded_methods; |
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51 GrowableArray<ciKlass*>* _unloaded_klasses; |
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52 GrowableArray<ciInstance*>* _unloaded_instances; |
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53 GrowableArray<ciReturnAddress*>* _return_addresses; |
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54 GrowableArray<ciSymbol*>* _symbols; // keep list of symbols created |
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55 int _next_ident; |
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56 |
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57 public: |
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58 struct NonPermObject : public ResourceObj { |
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59 ciObject* _object; |
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60 NonPermObject* _next; |
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61 |
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62 inline NonPermObject(NonPermObject* &bucket, oop key, ciObject* object); |
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63 ciObject* object() { return _object; } |
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64 NonPermObject* &next() { return _next; } |
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65 }; |
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66 private: |
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67 enum { NON_PERM_BUCKETS = 61 }; |
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68 NonPermObject* _non_perm_bucket[NON_PERM_BUCKETS]; |
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69 int _non_perm_count; |
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70 |
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71 int find(Metadata* key, GrowableArray<ciMetadata*>* objects); |
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72 bool is_found_at(int index, Metadata* key, GrowableArray<ciMetadata*>* objects); |
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73 void insert(int index, ciMetadata* obj, GrowableArray<ciMetadata*>* objects); |
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74 |
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75 ciObject* create_new_object(oop o); |
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76 ciMetadata* create_new_object(Metadata* o); |
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77 |
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78 static bool is_equal(NonPermObject* p, oop key) { |
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79 return p->object()->get_oop() == key; |
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80 } |
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81 |
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82 NonPermObject* &find_non_perm(oop key); |
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83 void insert_non_perm(NonPermObject* &where, oop key, ciObject* obj); |
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84 |
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85 void init_ident_of(ciBaseObject* obj); |
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86 |
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87 Arena* arena() { return _arena; } |
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88 |
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89 void print_contents_impl(); |
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90 |
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91 ciInstance* get_unloaded_instance(ciInstanceKlass* klass); |
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92 |
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93 public: |
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94 static bool is_initialized() { return _initialized; } |
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95 |
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96 static void initialize(); |
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97 void init_shared_objects(); |
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98 void remove_symbols(); |
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99 |
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100 ciObjectFactory(Arena* arena, int expected_size); |
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101 |
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102 // Get the ciObject corresponding to some oop. |
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103 ciObject* get(oop key); |
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104 ciMetadata* get_metadata(Metadata* key); |
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105 ciSymbol* get_symbol(Symbol* key); |
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106 |
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107 // Get the ciSymbol corresponding to one of the vmSymbols. |
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108 static ciSymbol* vm_symbol_at(int index); |
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109 |
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110 // Get the ciMethod representing an unloaded/unfound method. |
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111 ciMethod* get_unloaded_method(ciInstanceKlass* holder, |
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112 ciSymbol* name, |
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113 ciSymbol* signature, |
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114 ciInstanceKlass* accessor); |
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115 |
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116 // Get a ciKlass representing an unloaded klass. |
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117 ciKlass* get_unloaded_klass(ciKlass* accessing_klass, |
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118 ciSymbol* name, |
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119 bool create_if_not_found); |
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120 |
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121 // Get a ciInstance representing an unresolved klass mirror. |
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122 ciInstance* get_unloaded_klass_mirror(ciKlass* type); |
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123 |
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124 // Get a ciInstance representing an unresolved method handle constant. |
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125 ciInstance* get_unloaded_method_handle_constant(ciKlass* holder, |
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126 ciSymbol* name, |
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127 ciSymbol* signature, |
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128 int ref_kind); |
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129 |
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130 // Get a ciInstance representing an unresolved method type constant. |
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131 ciInstance* get_unloaded_method_type_constant(ciSymbol* signature); |
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132 |
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133 |
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134 ciInstance* get_unloaded_object_constant(); |
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135 |
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136 // Get the ciMethodData representing the methodData for a method |
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137 // with none. |
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138 ciMethodData* get_empty_methodData(); |
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139 |
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140 ciReturnAddress* get_return_address(int bci); |
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141 |
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142 GrowableArray<ciMetadata*>* get_ci_metadata() const { return _ci_metadata; } |
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143 // RedefineClasses support |
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144 void metadata_do(void f(Metadata*)); |
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145 |
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146 void print_contents(); |
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147 void print(); |
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148 }; |
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149 |
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150 #endif // SHARE_VM_CI_CIOBJECTFACTORY_HPP |