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 protected:
86 ciInstanceKlass(Klass* k);
87 ciInstanceKlass(ciSymbol* name, jobject loader);
88
89 InstanceKlass* get_instanceKlass() const {
90 return InstanceKlass::cast(get_Klass());
91 }
92
93 oop loader();
94 jobject loader_handle();
95
96 const char* type_string() { return "ciInstanceKlass"; }
97
98 bool is_in_package_impl(const char* packagename, int len);
99
100 void print_impl(outputStream* st);
101
102 ciConstantPoolCache* field_cache();
103
104 bool is_shared() { return _is_shared; }
105
106 void compute_shared_init_state();
107 bool compute_shared_has_subklass();
108 int compute_nonstatic_fields();
109 GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields);
110 bool compute_has_trusted_loader();
111
112 // Update the init_state for shared klasses
113 void update_if_shared(InstanceKlass::ClassState expected) {
114 if (_is_shared && _init_state != expected) {
115 if (is_loaded()) compute_shared_init_state();
116 }
117 }
118
119 public:
120 // Has this klass been initialized?
121 bool is_initialized() {
122 update_if_shared(InstanceKlass::fully_initialized);
123 return _init_state == InstanceKlass::fully_initialized;
124 }
125 bool is_not_initialized() {
126 update_if_shared(InstanceKlass::fully_initialized);
127 return _init_state < InstanceKlass::being_initialized;
128 }
129 // Is this klass being initialized?
187 } else {
188 return 2;
189 }
190 }
191 bool has_nonstatic_concrete_methods() {
192 assert(is_loaded(), "must be loaded");
193 return _has_nonstatic_concrete_methods;
194 }
195
196 bool is_hidden() const {
197 return _is_hidden;
198 }
199
200 bool is_record() const {
201 return _is_record;
202 }
203
204 ciInstanceKlass* get_canonical_holder(int offset);
205 ciField* get_field_by_offset(int field_offset, bool is_static);
206 ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static);
207
208 // total number of nonstatic fields (including inherited):
209 int nof_nonstatic_fields() {
210 if (_nonstatic_fields == nullptr)
211 return compute_nonstatic_fields();
212 else
213 return _nonstatic_fields->length();
214 }
215
216 bool has_injected_fields() {
217 if (_has_injected_fields == -1) {
218 compute_injected_fields();
219 }
220 return _has_injected_fields > 0 ? true : false;
221 }
222
223 bool has_object_fields() const;
224
225 // nth nonstatic field (presented by ascending address)
226 ciField* nonstatic_field_at(int i) {
227 assert(_nonstatic_fields != nullptr, "");
228 return _nonstatic_fields->at(i);
229 }
230
231 ciInstanceKlass* unique_concrete_subklass();
232 bool has_finalizable_subclass();
233
234 bool has_class_initializer();
235
236 bool contains_field_offset(int offset);
237
238 // Get the instance of java.lang.Class corresponding to
239 // this klass. This instance is used for locking of
240 // synchronized static methods of this klass.
241 ciInstance* java_mirror();
242
243 // Java access flags
244 bool is_public () { return flags().is_public(); }
245 bool is_final () { return flags().is_final(); }
246 bool is_super () { return flags().is_super(); }
247 bool is_interface () { return flags().is_interface(); }
248 bool is_abstract () { return flags().is_abstract(); }
249
250 ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
251 // Note: To find a method from name and type strings, use ciSymbol::make,
252 // but consider adding to vmSymbols.hpp instead.
253
254 bool is_leaf_type();
255 ciInstanceKlass* implementor();
256
257 ciInstanceKlass* unique_implementor() {
258 assert(is_loaded(), "must be loaded");
259 ciInstanceKlass* impl = implementor();
260 return (impl != this ? impl : nullptr);
261 }
262
263 // Is the defining class loader of this class the default loader?
264 bool uses_default_loader() const;
265
266 bool is_java_lang_Object() const;
267
268 BasicType box_klass_type() const;
269 bool is_box_klass() const;
270 bool is_boxed_value_offset(int offset) const;
271
272 // Is this klass in the given package?
273 bool is_in_package(const char* packagename) {
274 return is_in_package(packagename, (int) strlen(packagename));
275 }
276 bool is_in_package(const char* packagename, int len);
277
278 // What kind of ciObject is this?
279 bool is_instance_klass() const { return true; }
280
281 virtual ciKlass* exact_klass() {
282 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 protected:
99 ciInstanceKlass(Klass* k);
100 ciInstanceKlass(ciSymbol* name, jobject loader, BasicType bt = T_OBJECT); // for unloaded klasses
101
102 InstanceKlass* get_instanceKlass() const {
103 return InstanceKlass::cast(get_Klass());
104 }
105
106 oop loader();
107 jobject loader_handle();
108
109 const char* type_string() { return "ciInstanceKlass"; }
110
111 bool is_in_package_impl(const char* packagename, int len);
112
113 void print_impl(outputStream* st);
114
115 ciConstantPoolCache* field_cache();
116
117 bool is_shared() { return _is_shared; }
118
119 void compute_shared_init_state();
120 bool compute_shared_has_subklass();
121 void compute_nonstatic_fields();
122 void compute_nonstatic_fields_impl(const GrowableArray<ciField*>* super_declared_fields, const GrowableArray<ciField*>* super_fields);
123 bool compute_has_trusted_loader();
124
125 // Update the init_state for shared klasses
126 void update_if_shared(InstanceKlass::ClassState expected) {
127 if (_is_shared && _init_state != expected) {
128 if (is_loaded()) compute_shared_init_state();
129 }
130 }
131
132 public:
133 // Has this klass been initialized?
134 bool is_initialized() {
135 update_if_shared(InstanceKlass::fully_initialized);
136 return _init_state == InstanceKlass::fully_initialized;
137 }
138 bool is_not_initialized() {
139 update_if_shared(InstanceKlass::fully_initialized);
140 return _init_state < InstanceKlass::being_initialized;
141 }
142 // Is this klass being initialized?
200 } else {
201 return 2;
202 }
203 }
204 bool has_nonstatic_concrete_methods() {
205 assert(is_loaded(), "must be loaded");
206 return _has_nonstatic_concrete_methods;
207 }
208
209 bool is_hidden() const {
210 return _is_hidden;
211 }
212
213 bool is_record() const {
214 return _is_record;
215 }
216
217 ciInstanceKlass* get_canonical_holder(int offset);
218 ciField* get_field_by_offset(int field_offset, bool is_static);
219 ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static);
220 // Get field descriptor at field_offset ignoring flattening
221 ciField* get_non_flat_field_by_offset(int field_offset);
222 // Get the index of the declared field that contains this offset
223 int field_index_by_offset(int offset);
224
225 // Total number of nonstatic fields (including inherited)
226 int nof_declared_nonstatic_fields() {
227 if (_declared_nonstatic_fields == nullptr) {
228 compute_nonstatic_fields();
229 }
230 return _declared_nonstatic_fields->length();
231 }
232
233 int nof_nonstatic_fields() {
234 if (_nonstatic_fields == nullptr) {
235 compute_nonstatic_fields();
236 }
237 return _nonstatic_fields->length();
238 }
239
240 bool has_injected_fields() {
241 if (_has_injected_fields == -1) {
242 compute_injected_fields();
243 }
244 return _has_injected_fields > 0 ? true : false;
245 }
246
247 bool has_object_fields() const;
248
249 ciField* declared_nonstatic_field_at(int i) {
250 assert(_declared_nonstatic_fields != nullptr, "should be initialized");
251 return _declared_nonstatic_fields->at(i);
252 }
253
254 ciField* nonstatic_field_at(int i) {
255 assert(_nonstatic_fields != nullptr, "");
256 return _nonstatic_fields->at(i);
257 }
258
259 ciInstanceKlass* unique_concrete_subklass();
260 bool has_finalizable_subclass();
261
262 bool has_class_initializer();
263
264 bool contains_field_offset(int offset);
265
266 // Get the instance of java.lang.Class corresponding to
267 // this klass. This instance is used for locking of
268 // synchronized static methods of this klass.
269 ciInstance* java_mirror();
270
271 // Java access flags
272 bool is_public () { return flags().is_public(); }
273 bool is_final () { return flags().is_final(); }
274 bool is_interface () { return flags().is_interface(); }
275 bool is_abstract () { return flags().is_abstract(); }
276 bool is_abstract_value_klass() { return is_abstract() && !flags().is_identity(); }
277
278 ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
279 // Note: To find a method from name and type strings, use ciSymbol::make,
280 // but consider adding to vmSymbols.hpp instead.
281
282 bool is_leaf_type();
283 ciInstanceKlass* implementor();
284
285 ciInstanceKlass* unique_implementor() {
286 assert(is_loaded(), "must be loaded");
287 ciInstanceKlass* impl = implementor();
288 return (impl != this ? impl : nullptr);
289 }
290
291 virtual bool can_be_inline_klass(bool is_exact = false);
292
293 // Is the defining class loader of this class the default loader?
294 bool uses_default_loader() const;
295
296 bool is_java_lang_Object() const;
297
298 BasicType box_klass_type() const;
299 bool is_box_klass() const;
300 bool is_boxed_value_offset(int offset) const;
301
302 // Is this klass in the given package?
303 bool is_in_package(const char* packagename) {
304 return is_in_package(packagename, (int) strlen(packagename));
305 }
306 bool is_in_package(const char* packagename, int len);
307
308 // What kind of ciObject is this?
309 bool is_instance_klass() const { return true; }
310
311 virtual ciKlass* exact_klass() {
312 if (is_loaded() && is_final() && !is_interface()) {
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