Wed, 15 Feb 2012 16:29:40 -0800
7142680: default GC affected by jvm path
Summary: Removed old tiered code
Reviewed-by: never, kvn
1 /*
2 * Copyright (c) 1999, 2011, 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 // klassOop k = st.klass();
43 // ...
44 // }
46 class KlassStream VALUE_OBJ_CLASS_SPEC {
47 protected:
48 instanceKlassHandle _klass; // current klass/interface iterated over
49 objArrayHandle _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 // methodOop m = st.method();
79 // ...
80 // }
82 class MethodStream : public KlassStream {
83 private:
84 int length() const { return methods()->length(); }
85 objArrayOop 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 methodOop method() const { return methodOop(methods()->obj_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 klassOop _klass;
142 int _field_offset;
144 public:
145 FilteredField(klassOop klass, int field_offset) {
146 _klass = klass;
147 _field_offset = field_offset;
148 }
149 klassOop klass() { return _klass; }
150 oop* klass_addr() { return (oop*) &_klass; }
151 int field_offset() { return _field_offset; }
152 };
154 class FilteredFieldsMap : AllStatic {
155 private:
156 static GrowableArray<FilteredField *> *_filtered_fields;
157 public:
158 static void initialize();
159 static bool is_filtered_field(klassOop klass, int field_offset) {
160 for (int i=0; i < _filtered_fields->length(); i++) {
161 if (klass == _filtered_fields->at(i)->klass() &&
162 field_offset == _filtered_fields->at(i)->field_offset()) {
163 return true;
164 }
165 }
166 return false;
167 }
168 static int filtered_fields_count(klassOop klass, bool local_only) {
169 int nflds = 0;
170 for (int i=0; i < _filtered_fields->length(); i++) {
171 if (local_only && klass == _filtered_fields->at(i)->klass()) {
172 nflds++;
173 } else if (klass->klass_part()->is_subtype_of(_filtered_fields->at(i)->klass())) {
174 nflds++;
175 }
176 }
177 return nflds;
178 }
179 // GC support.
180 static void klasses_oops_do(OopClosure* f) {
181 for (int i = 0; i < _filtered_fields->length(); i++) {
182 f->do_oop((oop*)_filtered_fields->at(i)->klass_addr());
183 }
184 }
185 };
188 // A FilteredFieldStream streams over all fields in a class, superclasses and
189 // (super)interfaces. Streaming is done in reverse order (subclasses first,
190 // fields in reverse order)
191 //
192 // Usage:
193 //
194 // for (FilteredFieldStream st(k, false, false); !st.eos(); st.next()) {
195 // Symbol* field_name = st.name();
196 // ...
197 // }
199 class FilteredFieldStream : public FieldStream {
200 private:
201 int _filtered_fields_count;
202 bool has_filtered_field() { return (_filtered_fields_count > 0); }
204 public:
205 FilteredFieldStream(instanceKlassHandle klass, bool local_only, bool classes_only)
206 : FieldStream(klass, local_only, classes_only) {
207 _filtered_fields_count = FilteredFieldsMap::filtered_fields_count((klassOop)klass(), local_only);
208 }
209 int field_count();
210 void next() {
211 _index -= 1;
212 if (has_filtered_field()) {
213 while (_index >=0 && FilteredFieldsMap::is_filtered_field((klassOop)_klass(), offset())) {
214 _index -= 1;
215 }
216 }
217 }
218 };
220 #endif // SHARE_VM_RUNTIME_REFLECTIONUTILS_HPP