Mercurial > hg > truffle
annotate src/share/vm/runtime/reflectionUtils.hpp @ 12264:b2e698d2276c
8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation
Summary: Enhance method resolution and resulting data structures, plus some refactoring.
Reviewed-by: twisti, acorn, jrose
| author | drchase |
|---|---|
| date | Fri, 13 Sep 2013 22:38:02 -0400 |
| parents | f9be75d21404 |
| children | ac9cb1d5a202 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2013, 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_RUNTIME_REFLECTIONUTILS_HPP |
| 26 #define SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "oops/instanceKlass.hpp" | |
| 30 #include "oops/objArrayOop.hpp" | |
| 31 #include "oops/oopsHierarchy.hpp" | |
| 32 #include "runtime/handles.inline.hpp" | |
| 33 #include "runtime/reflection.hpp" | |
| 34 #include "utilities/accessFlags.hpp" | |
| 35 #include "utilities/globalDefinitions.hpp" | |
| 36 | |
| 0 | 37 // A KlassStream is an abstract stream for streaming over self, superclasses |
| 38 // and (super)interfaces. Streaming is done in reverse order (subclasses first, | |
| 39 // interfaces last). | |
| 40 // | |
| 41 // for (KlassStream st(k, false, false); !st.eos(); st.next()) { | |
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42 // Klass* k = st.klass(); |
| 0 | 43 // ... |
| 44 // } | |
| 45 | |
| 46 class KlassStream VALUE_OBJ_CLASS_SPEC { | |
| 47 protected: | |
| 48 instanceKlassHandle _klass; // current klass/interface iterated over | |
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49 Array<Klass*>* _interfaces; // transitive interfaces for initial class |
| 0 | 50 int _interface_index; // current interface being processed |
| 51 bool _local_only; // process initial class/interface only | |
| 52 bool _classes_only; // process classes only (no interfaces) | |
| 53 int _index; | |
| 54 | |
| 55 virtual int length() const = 0; | |
| 56 | |
| 57 public: | |
| 58 // constructor | |
| 59 KlassStream(instanceKlassHandle klass, bool local_only, bool classes_only); | |
| 60 | |
| 61 // testing | |
| 62 bool eos(); | |
| 63 | |
| 64 // iterating | |
| 65 virtual void next() = 0; | |
| 66 | |
| 67 // accessors | |
| 68 instanceKlassHandle klass() const { return _klass; } | |
| 69 int index() const { return _index; } | |
| 70 }; | |
| 71 | |
| 72 | |
| 73 // A MethodStream streams over all methods in a class, superclasses and (super)interfaces. | |
| 74 // Streaming is done in reverse order (subclasses first, methods in reverse order) | |
| 75 // Usage: | |
| 76 // | |
| 77 // for (MethodStream st(k, false, false); !st.eos(); st.next()) { | |
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78 // Method* m = st.method(); |
| 0 | 79 // ... |
| 80 // } | |
| 81 | |
| 82 class MethodStream : public KlassStream { | |
| 83 private: | |
| 84 int length() const { return methods()->length(); } | |
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85 Array<Method*>* methods() const { return _klass->methods(); } |
| 0 | 86 public: |
| 87 MethodStream(instanceKlassHandle klass, bool local_only, bool classes_only) | |
| 88 : KlassStream(klass, local_only, classes_only) { | |
| 89 _index = length(); | |
| 90 next(); | |
| 91 } | |
| 92 | |
| 93 void next() { _index--; } | |
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94 Method* method() const { return methods()->at(index()); } |
| 0 | 95 }; |
| 96 | |
| 97 | |
| 98 // A FieldStream streams over all fields in a class, superclasses and (super)interfaces. | |
| 99 // Streaming is done in reverse order (subclasses first, fields in reverse order) | |
| 100 // Usage: | |
| 101 // | |
| 102 // for (FieldStream st(k, false, false); !st.eos(); st.next()) { | |
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103 // Symbol* field_name = st.name(); |
| 0 | 104 // ... |
| 105 // } | |
| 106 | |
| 107 | |
| 108 class FieldStream : public KlassStream { | |
| 109 private: | |
| 3938 | 110 int length() const { return _klass->java_fields_count(); } |
| 111 | |
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112 fieldDescriptor _fd_buf; |
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113 |
| 0 | 114 public: |
| 115 FieldStream(instanceKlassHandle klass, bool local_only, bool classes_only) | |
| 116 : KlassStream(klass, local_only, classes_only) { | |
| 117 _index = length(); | |
| 118 next(); | |
| 119 } | |
| 120 | |
| 3938 | 121 void next() { _index -= 1; } |
| 0 | 122 |
| 123 // Accessors for current field | |
| 124 AccessFlags access_flags() const { | |
| 125 AccessFlags flags; | |
| 3938 | 126 flags.set_flags(_klass->field_access_flags(_index)); |
| 0 | 127 return flags; |
| 128 } | |
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129 Symbol* name() const { |
| 3938 | 130 return _klass->field_name(_index); |
| 0 | 131 } |
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132 Symbol* signature() const { |
| 3938 | 133 return _klass->field_signature(_index); |
| 0 | 134 } |
| 135 // missing: initval() | |
| 136 int offset() const { | |
| 3938 | 137 return _klass->field_offset( index() ); |
| 0 | 138 } |
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139 // bridge to a heavier API: |
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140 fieldDescriptor& field_descriptor() const { |
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141 fieldDescriptor& field = const_cast<fieldDescriptor&>(_fd_buf); |
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142 field.reinitialize(_klass(), _index); |
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143 return field; |
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144 } |
| 0 | 145 }; |
| 146 | |
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147 class FilteredField : public CHeapObj<mtInternal> { |
| 0 | 148 private: |
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149 Klass* _klass; |
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150 int _field_offset; |
| 0 | 151 |
| 152 public: | |
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153 FilteredField(Klass* klass, int field_offset) { |
| 0 | 154 _klass = klass; |
| 155 _field_offset = field_offset; | |
| 156 } | |
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157 Klass* klass() { return _klass; } |
| 0 | 158 int field_offset() { return _field_offset; } |
| 159 }; | |
| 160 | |
| 161 class FilteredFieldsMap : AllStatic { | |
| 162 private: | |
| 163 static GrowableArray<FilteredField *> *_filtered_fields; | |
| 164 public: | |
| 165 static void initialize(); | |
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166 static bool is_filtered_field(Klass* klass, int field_offset) { |
| 0 | 167 for (int i=0; i < _filtered_fields->length(); i++) { |
| 168 if (klass == _filtered_fields->at(i)->klass() && | |
| 169 field_offset == _filtered_fields->at(i)->field_offset()) { | |
| 170 return true; | |
| 171 } | |
| 172 } | |
| 173 return false; | |
| 174 } | |
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175 static int filtered_fields_count(Klass* klass, bool local_only) { |
| 0 | 176 int nflds = 0; |
| 177 for (int i=0; i < _filtered_fields->length(); i++) { | |
| 178 if (local_only && klass == _filtered_fields->at(i)->klass()) { | |
| 179 nflds++; | |
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180 } else if (klass->is_subtype_of(_filtered_fields->at(i)->klass())) { |
| 0 | 181 nflds++; |
| 182 } | |
| 183 } | |
| 184 return nflds; | |
| 185 } | |
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186 // Enhance Class Redefinition Support |
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187 static void classes_do(KlassClosure* f) { |
| 0 | 188 for (int i = 0; i < _filtered_fields->length(); i++) { |
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189 f->do_klass(_filtered_fields->at(i)->klass()); |
| 0 | 190 } |
| 191 } | |
| 192 }; | |
| 193 | |
| 194 | |
| 195 // A FilteredFieldStream streams over all fields in a class, superclasses and | |
| 196 // (super)interfaces. Streaming is done in reverse order (subclasses first, | |
| 197 // fields in reverse order) | |
| 198 // | |
| 199 // Usage: | |
| 200 // | |
| 201 // for (FilteredFieldStream st(k, false, false); !st.eos(); st.next()) { | |
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202 // Symbol* field_name = st.name(); |
| 0 | 203 // ... |
| 204 // } | |
| 205 | |
| 206 class FilteredFieldStream : public FieldStream { | |
| 207 private: | |
| 208 int _filtered_fields_count; | |
| 209 bool has_filtered_field() { return (_filtered_fields_count > 0); } | |
| 210 | |
| 211 public: | |
| 212 FilteredFieldStream(instanceKlassHandle klass, bool local_only, bool classes_only) | |
| 213 : FieldStream(klass, local_only, classes_only) { | |
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214 _filtered_fields_count = FilteredFieldsMap::filtered_fields_count((Klass*)klass(), local_only); |
| 0 | 215 } |
| 216 int field_count(); | |
| 217 void next() { | |
| 3938 | 218 _index -= 1; |
| 0 | 219 if (has_filtered_field()) { |
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220 while (_index >=0 && FilteredFieldsMap::is_filtered_field((Klass*)_klass(), offset())) { |
| 3938 | 221 _index -= 1; |
| 0 | 222 } |
| 223 } | |
| 224 } | |
| 225 }; | |
| 1972 | 226 |
| 227 #endif // SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP |