Mercurial > hg > truffle
comparison src/share/vm/ci/ciInstanceKlass.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 52fed2ec0afb |
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1 /* | |
2 * Copyright 1999-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // ciInstanceKlass | |
26 // | |
27 // This class represents a klassOop in the HotSpot virtual machine | |
28 // whose Klass part is an instanceKlass. It may or may not | |
29 // be loaded. | |
30 class ciInstanceKlass : public ciKlass { | |
31 CI_PACKAGE_ACCESS | |
32 friend class ciEnv; | |
33 friend class ciMethod; | |
34 friend class ciField; | |
35 friend class ciBytecodeStream; | |
36 | |
37 private: | |
38 bool _is_shared; | |
39 | |
40 jobject _loader; | |
41 jobject _protection_domain; | |
42 | |
43 bool _is_initialized; | |
44 bool _is_linked; | |
45 bool _has_finalizer; | |
46 bool _has_subklass; | |
47 ciFlags _flags; | |
48 jint _nonstatic_field_size; | |
49 | |
50 // Lazy fields get filled in only upon request. | |
51 ciInstanceKlass* _super; | |
52 ciInstance* _java_mirror; | |
53 | |
54 ciConstantPoolCache* _field_cache; // cached map index->field | |
55 GrowableArray<ciField*>* _nonstatic_fields; | |
56 | |
57 enum { implementors_limit = instanceKlass::implementors_limit }; | |
58 ciInstanceKlass* _implementors[implementors_limit]; | |
59 jint _nof_implementors; | |
60 | |
61 protected: | |
62 ciInstanceKlass(KlassHandle h_k); | |
63 ciInstanceKlass(ciSymbol* name, jobject loader, jobject protection_domain); | |
64 | |
65 instanceKlass* get_instanceKlass() const { | |
66 return (instanceKlass*)get_Klass(); | |
67 } | |
68 | |
69 oop loader(); | |
70 jobject loader_handle(); | |
71 | |
72 oop protection_domain(); | |
73 jobject protection_domain_handle(); | |
74 | |
75 const char* type_string() { return "ciInstanceKlass"; } | |
76 | |
77 void print_impl(outputStream* st); | |
78 | |
79 ciConstantPoolCache* field_cache(); | |
80 | |
81 bool is_shared() { return _is_shared; } | |
82 | |
83 bool compute_shared_is_initialized(); | |
84 bool compute_shared_is_linked(); | |
85 bool compute_shared_has_subklass(); | |
86 int compute_shared_nof_implementors(); | |
87 int compute_nonstatic_fields(); | |
88 GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields); | |
89 | |
90 public: | |
91 // Has this klass been initialized? | |
92 bool is_initialized() { | |
93 if (_is_shared && !_is_initialized) { | |
94 return is_loaded() && compute_shared_is_initialized(); | |
95 } | |
96 return _is_initialized; | |
97 } | |
98 // Has this klass been linked? | |
99 bool is_linked() { | |
100 if (_is_shared && !_is_linked) { | |
101 return is_loaded() && compute_shared_is_linked(); | |
102 } | |
103 return _is_linked; | |
104 } | |
105 | |
106 // General klass information. | |
107 ciFlags flags() { | |
108 assert(is_loaded(), "must be loaded"); | |
109 return _flags; | |
110 } | |
111 bool has_finalizer() { | |
112 assert(is_loaded(), "must be loaded"); | |
113 return _has_finalizer; } | |
114 bool has_subklass() { | |
115 assert(is_loaded(), "must be loaded"); | |
116 if (_is_shared && !_has_subklass) { | |
117 if (flags().is_final()) { | |
118 return false; | |
119 } else { | |
120 return compute_shared_has_subklass(); | |
121 } | |
122 } | |
123 return _has_subklass; | |
124 } | |
125 jint size_helper() { | |
126 return (Klass::layout_helper_size_in_bytes(layout_helper()) | |
127 >> LogHeapWordSize); | |
128 } | |
129 jint nonstatic_field_size() { | |
130 assert(is_loaded(), "must be loaded"); | |
131 return _nonstatic_field_size; } | |
132 ciInstanceKlass* super(); | |
133 jint nof_implementors() { | |
134 assert(is_loaded(), "must be loaded"); | |
135 if (_is_shared) return compute_shared_nof_implementors(); | |
136 return _nof_implementors; | |
137 } | |
138 | |
139 ciInstanceKlass* get_canonical_holder(int offset); | |
140 ciField* get_field_by_offset(int field_offset, bool is_static); | |
141 // total number of nonstatic fields (including inherited): | |
142 int nof_nonstatic_fields() { | |
143 if (_nonstatic_fields == NULL) | |
144 return compute_nonstatic_fields(); | |
145 else | |
146 return _nonstatic_fields->length(); | |
147 } | |
148 // nth nonstatic field (presented by ascending address) | |
149 ciField* nonstatic_field_at(int i) { | |
150 assert(_nonstatic_fields != NULL, ""); | |
151 return _nonstatic_fields->at(i); | |
152 } | |
153 | |
154 ciInstanceKlass* unique_concrete_subklass(); | |
155 bool has_finalizable_subclass(); | |
156 | |
157 bool contains_field_offset(int offset) { | |
158 return (offset/wordSize) >= instanceOopDesc::header_size() | |
159 && (offset/wordSize)-instanceOopDesc::header_size() < nonstatic_field_size(); | |
160 } | |
161 | |
162 // Get the instance of java.lang.Class corresponding to | |
163 // this klass. This instance is used for locking of | |
164 // synchronized static methods of this klass. | |
165 ciInstance* java_mirror(); | |
166 | |
167 // Java access flags | |
168 bool is_public () { return flags().is_public(); } | |
169 bool is_final () { return flags().is_final(); } | |
170 bool is_super () { return flags().is_super(); } | |
171 bool is_interface () { return flags().is_interface(); } | |
172 bool is_abstract () { return flags().is_abstract(); } | |
173 | |
174 ciMethod* find_method(ciSymbol* name, ciSymbol* signature); | |
175 // Note: To find a method from name and type strings, use ciSymbol::make, | |
176 // but consider adding to vmSymbols.hpp instead. | |
177 | |
178 bool is_leaf_type(); | |
179 ciInstanceKlass* implementor(int n); | |
180 | |
181 // Is the defining class loader of this class the default loader? | |
182 bool uses_default_loader(); | |
183 | |
184 bool is_java_lang_Object(); | |
185 | |
186 // What kind of ciObject is this? | |
187 bool is_instance_klass() { return true; } | |
188 bool is_java_klass() { return true; } | |
189 }; |