Mercurial > hg > truffle
annotate src/share/vm/runtime/reflectionUtils.hpp @ 14199:49a31fd8b93d
8025277: Add -XX: flag to print code cache sweeper statistics
Summary: New diagnostic flag prints statistics about the code cache sweeper
Reviewed-by: kvn
Contributed-by: tobi.hartmann@gmail.com
author | anoll |
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date | Thu, 19 Dec 2013 14:08:02 +0100 |
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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 // | |
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41 // for (KlassStream st(k, false, 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 instanceKlassHandle _base_klass; // initial klass/interface to iterate over |
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50 Array<Klass*>* _interfaces; // transitive interfaces for initial class |
0 | 51 int _interface_index; // current interface being processed |
52 bool _local_only; // process initial class/interface only | |
53 bool _classes_only; // process classes only (no interfaces) | |
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54 bool _walk_defaults; // process default methods |
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55 bool _base_class_search_defaults; // time to process default methods |
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56 bool _defaults_checked; // already checked for default methods |
0 | 57 int _index; |
58 | |
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59 virtual int length() = 0; |
0 | 60 |
61 public: | |
62 // constructor | |
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63 KlassStream(instanceKlassHandle klass, bool local_only, bool classes_only, bool walk_defaults); |
0 | 64 |
65 // testing | |
66 bool eos(); | |
67 | |
68 // iterating | |
69 virtual void next() = 0; | |
70 | |
71 // accessors | |
72 instanceKlassHandle klass() const { return _klass; } | |
73 int index() const { return _index; } | |
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74 bool base_class_search_defaults() const { return _base_class_search_defaults; } |
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75 void base_class_search_defaults(bool b) { _base_class_search_defaults = b; } |
0 | 76 }; |
77 | |
78 | |
79 // A MethodStream streams over all methods in a class, superclasses and (super)interfaces. | |
80 // Streaming is done in reverse order (subclasses first, methods in reverse order) | |
81 // Usage: | |
82 // | |
83 // for (MethodStream st(k, false, false); !st.eos(); st.next()) { | |
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84 // Method* m = st.method(); |
0 | 85 // ... |
86 // } | |
87 | |
88 class MethodStream : public KlassStream { | |
89 private: | |
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90 int length() { return methods()->length(); } |
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91 Array<Method*>* methods() { |
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92 if (base_class_search_defaults()) { |
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93 base_class_search_defaults(false); |
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94 return _klass->default_methods(); |
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95 } else { |
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96 return _klass->methods(); |
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97 } |
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98 } |
0 | 99 public: |
100 MethodStream(instanceKlassHandle klass, bool local_only, bool classes_only) | |
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101 : KlassStream(klass, local_only, classes_only, true) { |
0 | 102 _index = length(); |
103 next(); | |
104 } | |
105 | |
106 void next() { _index--; } | |
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107 Method* method() { return methods()->at(index()); } |
0 | 108 }; |
109 | |
110 | |
111 // A FieldStream streams over all fields in a class, superclasses and (super)interfaces. | |
112 // Streaming is done in reverse order (subclasses first, fields in reverse order) | |
113 // Usage: | |
114 // | |
115 // for (FieldStream st(k, false, false); !st.eos(); st.next()) { | |
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116 // Symbol* field_name = st.name(); |
0 | 117 // ... |
118 // } | |
119 | |
120 | |
121 class FieldStream : public KlassStream { | |
122 private: | |
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123 int length() { return _klass->java_fields_count(); } |
3938 | 124 |
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125 fieldDescriptor _fd_buf; |
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126 |
0 | 127 public: |
128 FieldStream(instanceKlassHandle klass, bool local_only, bool classes_only) | |
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129 : KlassStream(klass, local_only, classes_only, false) { |
0 | 130 _index = length(); |
131 next(); | |
132 } | |
133 | |
3938 | 134 void next() { _index -= 1; } |
0 | 135 |
136 // Accessors for current field | |
137 AccessFlags access_flags() const { | |
138 AccessFlags flags; | |
3938 | 139 flags.set_flags(_klass->field_access_flags(_index)); |
0 | 140 return flags; |
141 } | |
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142 Symbol* name() const { |
3938 | 143 return _klass->field_name(_index); |
0 | 144 } |
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145 Symbol* signature() const { |
3938 | 146 return _klass->field_signature(_index); |
0 | 147 } |
148 // missing: initval() | |
149 int offset() const { | |
3938 | 150 return _klass->field_offset( index() ); |
0 | 151 } |
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152 // bridge to a heavier API: |
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153 fieldDescriptor& field_descriptor() const { |
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154 fieldDescriptor& field = const_cast<fieldDescriptor&>(_fd_buf); |
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155 field.reinitialize(_klass(), _index); |
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156 return field; |
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157 } |
0 | 158 }; |
159 | |
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160 class FilteredField : public CHeapObj<mtInternal> { |
0 | 161 private: |
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162 Klass* _klass; |
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163 int _field_offset; |
0 | 164 |
165 public: | |
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166 FilteredField(Klass* klass, int field_offset) { |
0 | 167 _klass = klass; |
168 _field_offset = field_offset; | |
169 } | |
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170 Klass* klass() { return _klass; } |
0 | 171 int field_offset() { return _field_offset; } |
172 }; | |
173 | |
174 class FilteredFieldsMap : AllStatic { | |
175 private: | |
176 static GrowableArray<FilteredField *> *_filtered_fields; | |
177 public: | |
178 static void initialize(); | |
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179 static bool is_filtered_field(Klass* klass, int field_offset) { |
0 | 180 for (int i=0; i < _filtered_fields->length(); i++) { |
181 if (klass == _filtered_fields->at(i)->klass() && | |
182 field_offset == _filtered_fields->at(i)->field_offset()) { | |
183 return true; | |
184 } | |
185 } | |
186 return false; | |
187 } | |
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188 static int filtered_fields_count(Klass* klass, bool local_only) { |
0 | 189 int nflds = 0; |
190 for (int i=0; i < _filtered_fields->length(); i++) { | |
191 if (local_only && klass == _filtered_fields->at(i)->klass()) { | |
192 nflds++; | |
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193 } else if (klass->is_subtype_of(_filtered_fields->at(i)->klass())) { |
0 | 194 nflds++; |
195 } | |
196 } | |
197 return nflds; | |
198 } | |
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199 // Enhance Class Redefinition Support |
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200 static void classes_do(KlassClosure* f) { |
0 | 201 for (int i = 0; i < _filtered_fields->length(); i++) { |
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202 f->do_klass(_filtered_fields->at(i)->klass()); |
0 | 203 } |
204 } | |
205 }; | |
206 | |
207 | |
208 // A FilteredFieldStream streams over all fields in a class, superclasses and | |
209 // (super)interfaces. Streaming is done in reverse order (subclasses first, | |
210 // fields in reverse order) | |
211 // | |
212 // Usage: | |
213 // | |
214 // for (FilteredFieldStream st(k, false, false); !st.eos(); st.next()) { | |
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215 // Symbol* field_name = st.name(); |
0 | 216 // ... |
217 // } | |
218 | |
219 class FilteredFieldStream : public FieldStream { | |
220 private: | |
221 int _filtered_fields_count; | |
222 bool has_filtered_field() { return (_filtered_fields_count > 0); } | |
223 | |
224 public: | |
225 FilteredFieldStream(instanceKlassHandle klass, bool local_only, bool classes_only) | |
226 : FieldStream(klass, local_only, classes_only) { | |
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227 _filtered_fields_count = FilteredFieldsMap::filtered_fields_count((Klass*)klass(), local_only); |
0 | 228 } |
229 int field_count(); | |
230 void next() { | |
3938 | 231 _index -= 1; |
0 | 232 if (has_filtered_field()) { |
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233 while (_index >=0 && FilteredFieldsMap::is_filtered_field((Klass*)_klass(), offset())) { |
3938 | 234 _index -= 1; |
0 | 235 } |
236 } | |
237 } | |
238 }; | |
1972 | 239 |
240 #endif // SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP |