Fri, 30 Nov 2012 15:23:16 -0800
8003240: x86: move MacroAssembler into separate file
Reviewed-by: kvn
1 /*
2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP
26 #define SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP
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"
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()) {
42 // Klass* k = st.klass();
43 // ...
44 // }
46 class KlassStream VALUE_OBJ_CLASS_SPEC {
47 protected:
48 instanceKlassHandle _klass; // current klass/interface iterated over
49 Array<Klass*>* _interfaces; // transitive interfaces for initial class
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;
55 virtual int length() const = 0;
57 public:
58 // constructor
59 KlassStream(instanceKlassHandle klass, bool local_only, bool classes_only);
61 // testing
62 bool eos();
64 // iterating
65 virtual void next() = 0;
67 // accessors
68 instanceKlassHandle klass() const { return _klass; }
69 int index() const { return _index; }
70 };
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()) {
78 // Method* m = st.method();
79 // ...
80 // }
82 class MethodStream : public KlassStream {
83 private:
84 int length() const { return methods()->length(); }
85 Array<Method*>* methods() const { return _klass->methods(); }
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 }
93 void next() { _index--; }
94 Method* method() const { return methods()->at(index()); }
95 };
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()) {
103 // Symbol* field_name = st.name();
104 // ...
105 // }
108 class FieldStream : public KlassStream {
109 private:
110 int length() const { return _klass->java_fields_count(); }
112 public:
113 FieldStream(instanceKlassHandle klass, bool local_only, bool classes_only)
114 : KlassStream(klass, local_only, classes_only) {
115 _index = length();
116 next();
117 }
119 void next() { _index -= 1; }
121 // Accessors for current field
122 AccessFlags access_flags() const {
123 AccessFlags flags;
124 flags.set_flags(_klass->field_access_flags(_index));
125 return flags;
126 }
127 Symbol* name() const {
128 return _klass->field_name(_index);
129 }
130 Symbol* signature() const {
131 return _klass->field_signature(_index);
132 }
133 // missing: initval()
134 int offset() const {
135 return _klass->field_offset( index() );
136 }
137 };
139 class FilteredField {
140 private:
141 Klass* _klass;
142 int _field_offset;
144 public:
145 FilteredField(Klass* klass, int field_offset) {
146 _klass = klass;
147 _field_offset = field_offset;
148 }
149 Klass* klass() { return _klass; }
150 int field_offset() { return _field_offset; }
151 };
153 class FilteredFieldsMap : AllStatic {
154 private:
155 static GrowableArray<FilteredField *> *_filtered_fields;
156 public:
157 static void initialize();
158 static bool is_filtered_field(Klass* klass, int field_offset) {
159 for (int i=0; i < _filtered_fields->length(); i++) {
160 if (klass == _filtered_fields->at(i)->klass() &&
161 field_offset == _filtered_fields->at(i)->field_offset()) {
162 return true;
163 }
164 }
165 return false;
166 }
167 static int filtered_fields_count(Klass* klass, bool local_only) {
168 int nflds = 0;
169 for (int i=0; i < _filtered_fields->length(); i++) {
170 if (local_only && klass == _filtered_fields->at(i)->klass()) {
171 nflds++;
172 } else if (klass->is_subtype_of(_filtered_fields->at(i)->klass())) {
173 nflds++;
174 }
175 }
176 return nflds;
177 }
178 // Enhance Class Redefinition Support
179 static void classes_do(KlassClosure* f) {
180 for (int i = 0; i < _filtered_fields->length(); i++) {
181 f->do_klass(_filtered_fields->at(i)->klass());
182 }
183 }
184 };
187 // A FilteredFieldStream streams over all fields in a class, superclasses and
188 // (super)interfaces. Streaming is done in reverse order (subclasses first,
189 // fields in reverse order)
190 //
191 // Usage:
192 //
193 // for (FilteredFieldStream st(k, false, false); !st.eos(); st.next()) {
194 // Symbol* field_name = st.name();
195 // ...
196 // }
198 class FilteredFieldStream : public FieldStream {
199 private:
200 int _filtered_fields_count;
201 bool has_filtered_field() { return (_filtered_fields_count > 0); }
203 public:
204 FilteredFieldStream(instanceKlassHandle klass, bool local_only, bool classes_only)
205 : FieldStream(klass, local_only, classes_only) {
206 _filtered_fields_count = FilteredFieldsMap::filtered_fields_count((Klass*)klass(), local_only);
207 }
208 int field_count();
209 void next() {
210 _index -= 1;
211 if (has_filtered_field()) {
212 while (_index >=0 && FilteredFieldsMap::is_filtered_field((Klass*)_klass(), offset())) {
213 _index -= 1;
214 }
215 }
216 }
217 };
219 #endif // SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP