Mercurial > hg > truffle

comparison src/share/vm/ci/ciInstanceKlass.hpp @ 0:a61af66fc99e jdk7-b24

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial load
author duke
date Sat, 01 Dec 2007 00:00:00 +0000
parents
children 52fed2ec0afb
comparison
equal deleted inserted replaced
-1:000000000000 0:a61af66fc99e
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 };