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?
193 } else {
194 return 2;
195 }
196 }
197 bool has_nonstatic_concrete_methods() {
198 assert(is_loaded(), "must be loaded");
199 return _has_nonstatic_concrete_methods;
200 }
201
202 bool is_hidden() const {
203 return _is_hidden;
204 }
205
206 bool is_record() const {
207 return _is_record;
208 }
209
210 ciInstanceKlass* get_canonical_holder(int offset);
211 ciField* get_field_by_offset(int field_offset, bool is_static);
212 ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static);
213 BasicType get_field_type_by_offset(int field_offset, bool is_static);
214
215 // total number of nonstatic fields (including inherited):
216 int nof_nonstatic_fields() {
217 if (_nonstatic_fields == nullptr)
218 return compute_nonstatic_fields();
219 else
220 return _nonstatic_fields->length();
221 }
222
223 bool has_injected_fields() {
224 if (_has_injected_fields == -1) {
225 compute_injected_fields();
226 }
227 return _has_injected_fields > 0 ? true : false;
228 }
229
230 bool has_object_fields() const;
231
232 // nth nonstatic field (presented by ascending address)
233 ciField* nonstatic_field_at(int i) {
234 assert(_nonstatic_fields != nullptr, "");
235 return _nonstatic_fields->at(i);
236 }
237
238 ciInstanceKlass* unique_concrete_subklass();
239 bool has_finalizable_subclass();
240
241 bool has_class_initializer();
242
243 bool contains_field_offset(int offset);
244
245 // Get the instance of java.lang.Class corresponding to
246 // this klass. This instance is used for locking of
247 // synchronized static methods of this klass.
248 ciInstance* java_mirror();
249
250 // Java access flags
251 bool is_public () { return flags().is_public(); }
252 bool is_final () { return flags().is_final(); }
253 bool is_super () { return flags().is_super(); }
254 bool is_interface () { return flags().is_interface(); }
255 bool is_abstract () { return flags().is_abstract(); }
256
257 ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
258 // Note: To find a method from name and type strings, use ciSymbol::make,
259 // but consider adding to vmSymbols.hpp instead.
260
261 bool is_leaf_type();
262 ciInstanceKlass* implementor();
263
264 ciInstanceKlass* unique_implementor() {
265 assert(is_loaded(), "must be loaded");
266 assert(is_interface(), "must be");
267 ciInstanceKlass* impl = implementor();
268 return (impl != this ? impl : nullptr);
269 }
270
271 // Is the defining class loader of this class the default loader?
272 bool uses_default_loader() const;
273
274 bool is_java_lang_Object() const;
275
276 BasicType box_klass_type() const;
277 bool is_box_klass() const;
278 bool is_boxed_value_offset(int offset) const;
279
280 // Is this klass in the given package?
281 bool is_in_package(const char* packagename) {
282 return is_in_package(packagename, (int) strlen(packagename));
283 }
284 bool is_in_package(const char* packagename, int len);
285
286 // What kind of ciObject is this?
287 bool is_instance_klass() const { return true; }
288
289 virtual ciKlass* exact_klass() {
290 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?
206 } else {
207 return 2;
208 }
209 }
210 bool has_nonstatic_concrete_methods() {
211 assert(is_loaded(), "must be loaded");
212 return _has_nonstatic_concrete_methods;
213 }
214
215 bool is_hidden() const {
216 return _is_hidden;
217 }
218
219 bool is_record() const {
220 return _is_record;
221 }
222
223 ciInstanceKlass* get_canonical_holder(int offset);
224 ciField* get_field_by_offset(int field_offset, bool is_static);
225 ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static);
226 // Get field descriptor at field_offset ignoring flattening
227 ciField* get_non_flat_field_by_offset(int field_offset);
228 // Get the index of the declared field that contains this offset
229 int field_index_by_offset(int offset);
230
231 // Total number of nonstatic fields (including inherited)
232 int nof_declared_nonstatic_fields() {
233 if (_declared_nonstatic_fields == nullptr) {
234 compute_nonstatic_fields();
235 }
236 return _declared_nonstatic_fields->length();
237 }
238 BasicType get_field_type_by_offset(int field_offset, bool is_static);
239
240 int nof_nonstatic_fields() {
241 if (_nonstatic_fields == nullptr) {
242 compute_nonstatic_fields();
243 }
244 return _nonstatic_fields->length();
245 }
246
247 bool has_injected_fields() {
248 if (_has_injected_fields == -1) {
249 compute_injected_fields();
250 }
251 return _has_injected_fields > 0 ? true : false;
252 }
253
254 bool has_object_fields() const;
255
256 ciField* declared_nonstatic_field_at(int i) {
257 assert(_declared_nonstatic_fields != nullptr, "should be initialized");
258 return _declared_nonstatic_fields->at(i);
259 }
260
261 ciField* nonstatic_field_at(int i) {
262 assert(_nonstatic_fields != nullptr, "");
263 return _nonstatic_fields->at(i);
264 }
265
266 ciInstanceKlass* unique_concrete_subklass();
267 bool has_finalizable_subclass();
268
269 bool has_class_initializer();
270
271 bool contains_field_offset(int offset);
272
273 // Get the instance of java.lang.Class corresponding to
274 // this klass. This instance is used for locking of
275 // synchronized static methods of this klass.
276 ciInstance* java_mirror();
277
278 // Java access flags
279 bool is_public () { return flags().is_public(); }
280 bool is_final () { return flags().is_final(); }
281 bool is_interface () { return flags().is_interface(); }
282 bool is_abstract () { return flags().is_abstract(); }
283 bool is_abstract_value_klass() { return is_abstract() && !flags().is_identity(); }
284
285 ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
286 // Note: To find a method from name and type strings, use ciSymbol::make,
287 // but consider adding to vmSymbols.hpp instead.
288
289 bool is_leaf_type();
290 ciInstanceKlass* implementor();
291
292 ciInstanceKlass* unique_implementor() {
293 assert(is_loaded(), "must be loaded");
294 assert(is_interface(), "must be");
295 ciInstanceKlass* impl = implementor();
296 return (impl != this ? impl : nullptr);
297 }
298
299 virtual bool can_be_inline_klass(bool is_exact = false);
300
301 // Is the defining class loader of this class the default loader?
302 bool uses_default_loader() const;
303
304 bool is_java_lang_Object() const;
305
306 BasicType box_klass_type() const;
307 bool is_box_klass() const;
308 bool is_boxed_value_offset(int offset) const;
309
310 // Is this klass in the given package?
311 bool is_in_package(const char* packagename) {
312 return is_in_package(packagename, (int) strlen(packagename));
313 }
314 bool is_in_package(const char* packagename, int len);
315
316 // What kind of ciObject is this?
317 bool is_instance_klass() const { return true; }
318
319 virtual ciKlass* exact_klass() {
320 if (is_loaded() && is_final() && !is_interface()) {
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