Mon, 26 Apr 2010 23:59:45 -0700
6943485: JVMTI always on capabilities change code generation too much
Reviewed-by: twisti, dcubed
1 /*
2 * Copyright 1999-2008 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 */
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 ciBytecodeStream;
33 friend class ciEnv;
34 friend class ciExceptionHandler;
35 friend class ciMethod;
36 friend class ciField;
38 private:
39 jobject _loader;
40 jobject _protection_domain;
42 bool _is_shared;
43 bool _is_initialized;
44 bool _is_linked;
45 bool _has_finalizer;
46 bool _has_subklass;
47 bool _has_nonstatic_fields;
49 ciFlags _flags;
50 jint _nonstatic_field_size;
51 jint _nonstatic_oop_map_size;
53 // Lazy fields get filled in only upon request.
54 ciInstanceKlass* _super;
55 ciInstance* _java_mirror;
57 ciConstantPoolCache* _field_cache; // cached map index->field
58 GrowableArray<ciField*>* _nonstatic_fields;
60 enum { implementors_limit = instanceKlass::implementors_limit };
61 ciInstanceKlass* _implementors[implementors_limit];
62 jint _nof_implementors;
64 GrowableArray<ciField*>* _non_static_fields;
66 protected:
67 ciInstanceKlass(KlassHandle h_k);
68 ciInstanceKlass(ciSymbol* name, jobject loader, jobject protection_domain);
70 instanceKlass* get_instanceKlass() const {
71 return (instanceKlass*)get_Klass();
72 }
74 oop loader();
75 jobject loader_handle();
77 oop protection_domain();
78 jobject protection_domain_handle();
80 const char* type_string() { return "ciInstanceKlass"; }
82 bool is_in_package_impl(const char* packagename, int len);
84 void print_impl(outputStream* st);
86 ciConstantPoolCache* field_cache();
88 bool is_shared() { return _is_shared; }
90 bool compute_shared_is_initialized();
91 bool compute_shared_is_linked();
92 bool compute_shared_has_subklass();
93 int compute_shared_nof_implementors();
94 int compute_nonstatic_fields();
95 GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields);
97 public:
98 // Has this klass been initialized?
99 bool is_initialized() {
100 if (_is_shared && !_is_initialized) {
101 return is_loaded() && compute_shared_is_initialized();
102 }
103 return _is_initialized;
104 }
105 // Has this klass been linked?
106 bool is_linked() {
107 if (_is_shared && !_is_linked) {
108 return is_loaded() && compute_shared_is_linked();
109 }
110 return _is_linked;
111 }
113 // General klass information.
114 ciFlags flags() {
115 assert(is_loaded(), "must be loaded");
116 return _flags;
117 }
118 bool has_finalizer() {
119 assert(is_loaded(), "must be loaded");
120 return _has_finalizer; }
121 bool has_subklass() {
122 assert(is_loaded(), "must be loaded");
123 if (_is_shared && !_has_subklass) {
124 if (flags().is_final()) {
125 return false;
126 } else {
127 return compute_shared_has_subklass();
128 }
129 }
130 return _has_subklass;
131 }
132 jint size_helper() {
133 return (Klass::layout_helper_size_in_bytes(layout_helper())
134 >> LogHeapWordSize);
135 }
136 jint nonstatic_field_size() {
137 assert(is_loaded(), "must be loaded");
138 return _nonstatic_field_size; }
139 jint has_nonstatic_fields() {
140 assert(is_loaded(), "must be loaded");
141 return _has_nonstatic_fields; }
142 jint nonstatic_oop_map_size() {
143 assert(is_loaded(), "must be loaded");
144 return _nonstatic_oop_map_size; }
145 ciInstanceKlass* super();
146 jint nof_implementors() {
147 assert(is_loaded(), "must be loaded");
148 if (_is_shared) return compute_shared_nof_implementors();
149 return _nof_implementors;
150 }
152 ciInstanceKlass* get_canonical_holder(int offset);
153 ciField* get_field_by_offset(int field_offset, bool is_static);
154 ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static);
156 GrowableArray<ciField*>* non_static_fields();
158 // total number of nonstatic fields (including inherited):
159 int nof_nonstatic_fields() {
160 if (_nonstatic_fields == NULL)
161 return compute_nonstatic_fields();
162 else
163 return _nonstatic_fields->length();
164 }
165 // nth nonstatic field (presented by ascending address)
166 ciField* nonstatic_field_at(int i) {
167 assert(_nonstatic_fields != NULL, "");
168 return _nonstatic_fields->at(i);
169 }
171 ciInstanceKlass* unique_concrete_subklass();
172 bool has_finalizable_subclass();
174 bool contains_field_offset(int offset) {
175 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size());
176 }
178 // Get the instance of java.lang.Class corresponding to
179 // this klass. This instance is used for locking of
180 // synchronized static methods of this klass.
181 ciInstance* java_mirror();
183 // Java access flags
184 bool is_public () { return flags().is_public(); }
185 bool is_final () { return flags().is_final(); }
186 bool is_super () { return flags().is_super(); }
187 bool is_interface () { return flags().is_interface(); }
188 bool is_abstract () { return flags().is_abstract(); }
190 ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
191 // Note: To find a method from name and type strings, use ciSymbol::make,
192 // but consider adding to vmSymbols.hpp instead.
194 bool is_leaf_type();
195 ciInstanceKlass* implementor(int n);
197 // Is the defining class loader of this class the default loader?
198 bool uses_default_loader();
200 bool is_java_lang_Object();
202 // Is this klass in the given package?
203 bool is_in_package(const char* packagename) {
204 return is_in_package(packagename, (int) strlen(packagename));
205 }
206 bool is_in_package(const char* packagename, int len);
208 // What kind of ciObject is this?
209 bool is_instance_klass() { return true; }
210 bool is_java_klass() { return true; }
211 };