51
52 jobject _loader;
53
54 InstanceKlass::ClassState _init_state; // state of class
55 bool _is_shared;
56 bool _has_finalizer;
57 SubklassValue _has_subklass;
58 bool _has_nonstatic_fields;
59 bool _has_nonstatic_concrete_methods;
60 bool _is_hidden;
61 bool _is_record;
62 bool _has_trusted_loader;
63
64 ciFlags _flags;
65
66 // Lazy fields get filled in only upon request.
67 ciInstanceKlass* _super;
68 ciInstance* _java_mirror;
69
70 ciConstantPoolCache* _field_cache; // cached map index->field
71 GrowableArray<ciField*>* _nonstatic_fields; // ordered by JavaFieldStream
72 int _has_injected_fields; // any non static injected fields? lazily initialized.
73
74 // The possible values of the _implementor fall into following three cases:
75 // null: no implementor.
76 // A ciInstanceKlass that's not itself: one implementor.
77 // Itself: more than one implementor.
78 ciInstanceKlass* _implementor;
79 GrowableArray<ciInstanceKlass*>* _transitive_interfaces;
80
81 void compute_injected_fields();
82 bool compute_injected_fields_helper();
83 void compute_transitive_interfaces();
84
85 ciField* get_non_static_field_by_offset(int field_offset);
86
87 protected:
88 ciInstanceKlass(Klass* k);
89 ciInstanceKlass(ciSymbol* name, jobject loader);
90
91 InstanceKlass* get_instanceKlass() const {
92 return InstanceKlass::cast(get_Klass());
93 }
94
95 oop loader();
96 jobject loader_handle();
97
98 const char* type_string() { return "ciInstanceKlass"; }
99
100 bool is_in_package_impl(const char* packagename, int len);
101
102 void print_impl(outputStream* st);
103
104 ciConstantPoolCache* field_cache();
105
106 bool is_shared() { return _is_shared; }
107
108 void compute_shared_init_state();
109 bool compute_shared_has_subklass();
110 int compute_nonstatic_fields();
111 GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields);
112 bool compute_has_trusted_loader();
113
114 // Update the init_state for shared klasses
115 void update_if_shared(InstanceKlass::ClassState expected) {
116 if (_is_shared && _init_state != expected) {
117 if (is_loaded()) compute_shared_init_state();
118 }
119 }
120
121 public:
122 // Has this klass been initialized?
123 bool is_initialized() {
124 update_if_shared(InstanceKlass::fully_initialized);
125 return _init_state == InstanceKlass::fully_initialized;
126 }
127 bool is_not_initialized() {
128 update_if_shared(InstanceKlass::fully_initialized);
129 return _init_state < InstanceKlass::being_initialized;
130 }
131 // Is this klass being initialized?
189 } else {
190 return 2;
191 }
192 }
193 bool has_nonstatic_concrete_methods() {
194 assert(is_loaded(), "must be loaded");
195 return _has_nonstatic_concrete_methods;
196 }
197
198 bool is_hidden() const {
199 return _is_hidden;
200 }
201
202 bool is_record() const {
203 return _is_record;
204 }
205
206 ciInstanceKlass* get_canonical_holder(int offset);
207 ciField* get_field_by_offset(int field_offset, bool is_static);
208 ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static);
209 BasicType get_field_type_by_offset(int field_offset, bool is_static);
210
211 // total number of nonstatic fields (including inherited):
212 int nof_nonstatic_fields() {
213 if (_nonstatic_fields == nullptr)
214 return compute_nonstatic_fields();
215 else
216 return _nonstatic_fields->length();
217 }
218
219 bool has_injected_fields() {
220 if (_has_injected_fields == -1) {
221 compute_injected_fields();
222 }
223 return _has_injected_fields > 0 ? true : false;
224 }
225
226 bool has_object_fields() const;
227
228 // nth nonstatic field (presented by ascending address)
229 ciField* nonstatic_field_at(int i) {
230 assert(_nonstatic_fields != nullptr, "");
231 return _nonstatic_fields->at(i);
232 }
233
234 ciInstanceKlass* unique_concrete_subklass();
235 bool has_finalizable_subclass();
236
237 bool has_class_initializer();
238
239 bool contains_field_offset(int offset);
240
241 // Get the instance of java.lang.Class corresponding to
242 // this klass. This instance is used for locking of
243 // synchronized static methods of this klass.
244 ciInstance* java_mirror();
245
246 // Java access flags
247 bool is_public () { return flags().is_public(); }
248 bool is_final () { return flags().is_final(); }
249 bool is_super () { return flags().is_super(); }
250 bool is_interface () { return flags().is_interface(); }
251 bool is_abstract () { return flags().is_abstract(); }
252
253 ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
254 // Note: To find a method from name and type strings, use ciSymbol::make,
255 // but consider adding to vmSymbols.hpp instead.
256
257 bool is_leaf_type();
258 ciInstanceKlass* implementor();
259
260 ciInstanceKlass* unique_implementor() {
261 assert(is_loaded(), "must be loaded");
262 assert(is_interface(), "must be");
263 ciInstanceKlass* impl = implementor();
264 return (impl != this ? impl : nullptr);
265 }
266
267 // Is the defining class loader of this class the default loader?
268 bool uses_default_loader() const;
269
270 bool is_java_lang_Object() const;
271
272 BasicType box_klass_type() const;
273 bool is_box_klass() const;
274 bool is_boxed_value_offset(int offset) const;
275
276 // Is this klass in the given package?
277 bool is_in_package(const char* packagename) {
278 return is_in_package(packagename, (int) strlen(packagename));
279 }
280 bool is_in_package(const char* packagename, int len);
281
282 // What kind of ciObject is this?
283 bool is_instance_klass() const { return true; }
284
285 virtual ciKlass* exact_klass() {
286 if (is_loaded() && is_final() && !is_interface()) {
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51
52 jobject _loader;
53
54 InstanceKlass::ClassState _init_state; // state of class
55 bool _is_shared;
56 bool _has_finalizer;
57 SubklassValue _has_subklass;
58 bool _has_nonstatic_fields;
59 bool _has_nonstatic_concrete_methods;
60 bool _is_hidden;
61 bool _is_record;
62 bool _has_trusted_loader;
63
64 ciFlags _flags;
65
66 // Lazy fields get filled in only upon request.
67 ciInstanceKlass* _super;
68 ciInstance* _java_mirror;
69
70 ciConstantPoolCache* _field_cache; // cached map index->field
71
72 // Fields declared in the bytecode (without nested fields in flat fields),
73 // ordered in JavaFieldStream order, with superclasses first (i.e. from lang.java.Object
74 // to most derived class).
75 const GrowableArray<ciField*>* _declared_nonstatic_fields;
76
77 // Fields laid out in memory (flat fields are expanded into their components). The ciField object
78 // for each primitive component has the holder being this ciInstanceKlass or one of its
79 // superclasses.
80 // Fields are in the same order as in _declared_nonstatic_fields, but flat fields are replaced by
81 // the list of their own fields, ordered the same way (hierarchy traversed top-down, in
82 // JavaFieldStream order).
83 const GrowableArray<ciField*>* _nonstatic_fields;
84
85 int _has_injected_fields; // any non static injected fields? lazily initialized.
86
87 // The possible values of the _implementor fall into following three cases:
88 // null: no implementor.
89 // A ciInstanceKlass that's not itself: one implementor.
90 // Itself: more than one implementor.
91 ciInstanceKlass* _implementor;
92 GrowableArray<ciInstanceKlass*>* _transitive_interfaces;
93
94 void compute_injected_fields();
95 bool compute_injected_fields_helper();
96 void compute_transitive_interfaces();
97
98 ciField* get_non_static_field_by_offset(int field_offset);
99
100 protected:
101 ciInstanceKlass(Klass* k);
102 ciInstanceKlass(ciSymbol* name, jobject loader, BasicType bt = T_OBJECT); // for unloaded klasses
103
104 InstanceKlass* get_instanceKlass() const {
105 return InstanceKlass::cast(get_Klass());
106 }
107
108 oop loader();
109 jobject loader_handle();
110
111 const char* type_string() { return "ciInstanceKlass"; }
112
113 bool is_in_package_impl(const char* packagename, int len);
114
115 void print_impl(outputStream* st);
116
117 ciConstantPoolCache* field_cache();
118
119 bool is_shared() { return _is_shared; }
120
121 void compute_shared_init_state();
122 bool compute_shared_has_subklass();
123 void compute_nonstatic_fields();
124 void compute_nonstatic_fields_impl(const GrowableArray<ciField*>* super_declared_fields, const GrowableArray<ciField*>* super_fields);
125 bool compute_has_trusted_loader();
126
127 // Update the init_state for shared klasses
128 void update_if_shared(InstanceKlass::ClassState expected) {
129 if (_is_shared && _init_state != expected) {
130 if (is_loaded()) compute_shared_init_state();
131 }
132 }
133
134 public:
135 // Has this klass been initialized?
136 bool is_initialized() {
137 update_if_shared(InstanceKlass::fully_initialized);
138 return _init_state == InstanceKlass::fully_initialized;
139 }
140 bool is_not_initialized() {
141 update_if_shared(InstanceKlass::fully_initialized);
142 return _init_state < InstanceKlass::being_initialized;
143 }
144 // Is this klass being initialized?
202 } else {
203 return 2;
204 }
205 }
206 bool has_nonstatic_concrete_methods() {
207 assert(is_loaded(), "must be loaded");
208 return _has_nonstatic_concrete_methods;
209 }
210
211 bool is_hidden() const {
212 return _is_hidden;
213 }
214
215 bool is_record() const {
216 return _is_record;
217 }
218
219 ciInstanceKlass* get_canonical_holder(int offset);
220 ciField* get_field_by_offset(int field_offset, bool is_static);
221 ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static);
222 // Get field descriptor at field_offset ignoring flattening
223 ciField* get_non_flat_field_by_offset(int field_offset);
224 // Get the index of the declared field that contains this offset
225 int field_index_by_offset(int offset);
226
227 // Total number of nonstatic fields (including inherited)
228 int nof_declared_nonstatic_fields() {
229 if (_declared_nonstatic_fields == nullptr) {
230 compute_nonstatic_fields();
231 }
232 return _declared_nonstatic_fields->length();
233 }
234 BasicType get_field_type_by_offset(int field_offset, bool is_static);
235
236 int nof_nonstatic_fields() {
237 if (_nonstatic_fields == nullptr) {
238 compute_nonstatic_fields();
239 }
240 return _nonstatic_fields->length();
241 }
242
243 bool has_injected_fields() {
244 if (_has_injected_fields == -1) {
245 compute_injected_fields();
246 }
247 return _has_injected_fields > 0 ? true : false;
248 }
249
250 bool has_object_fields() const;
251
252 ciField* declared_nonstatic_field_at(int i) {
253 assert(_declared_nonstatic_fields != nullptr, "should be initialized");
254 return _declared_nonstatic_fields->at(i);
255 }
256
257 ciField* nonstatic_field_at(int i) {
258 assert(_nonstatic_fields != nullptr, "");
259 return _nonstatic_fields->at(i);
260 }
261
262 ciInstanceKlass* unique_concrete_subklass();
263 bool has_finalizable_subclass();
264
265 bool has_class_initializer();
266
267 bool contains_field_offset(int offset);
268
269 // Get the instance of java.lang.Class corresponding to
270 // this klass. This instance is used for locking of
271 // synchronized static methods of this klass.
272 ciInstance* java_mirror();
273
274 // Java access flags
275 bool is_public () { return flags().is_public(); }
276 bool is_final () { return flags().is_final(); }
277 bool is_interface () { return flags().is_interface(); }
278 bool is_abstract () { return flags().is_abstract(); }
279 bool is_abstract_value_klass() { return is_abstract() && !flags().is_identity(); }
280
281 ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
282 // Note: To find a method from name and type strings, use ciSymbol::make,
283 // but consider adding to vmSymbols.hpp instead.
284
285 bool is_leaf_type();
286 ciInstanceKlass* implementor();
287
288 ciInstanceKlass* unique_implementor() {
289 assert(is_loaded(), "must be loaded");
290 assert(is_interface(), "must be");
291 ciInstanceKlass* impl = implementor();
292 return (impl != this ? impl : nullptr);
293 }
294
295 virtual bool can_be_inline_klass(bool is_exact = false);
296
297 // Is the defining class loader of this class the default loader?
298 bool uses_default_loader() const;
299
300 bool is_java_lang_Object() const;
301
302 BasicType box_klass_type() const;
303 bool is_box_klass() const;
304 bool is_boxed_value_offset(int offset) const;
305
306 // Is this klass in the given package?
307 bool is_in_package(const char* packagename) {
308 return is_in_package(packagename, (int) strlen(packagename));
309 }
310 bool is_in_package(const char* packagename, int len);
311
312 // What kind of ciObject is this?
313 bool is_instance_klass() const { return true; }
314
315 virtual ciKlass* exact_klass() {
316 if (is_loaded() && is_final() && !is_interface()) {
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