50
51 jobject _loader;
52
53 InstanceKlass::ClassState _init_state; // state of class
54 bool _is_shared;
55 bool _has_finalizer;
56 SubklassValue _has_subklass;
57 bool _has_nonstatic_fields;
58 bool _has_nonstatic_concrete_methods;
59 bool _is_hidden;
60 bool _is_record;
61 bool _has_trusted_loader;
62
63 ciFlags _flags;
64
65 // Lazy fields get filled in only upon request.
66 ciInstanceKlass* _super;
67 ciInstance* _java_mirror;
68
69 ciConstantPoolCache* _field_cache; // cached map index->field
70 GrowableArray<ciField*>* _nonstatic_fields; // ordered by JavaFieldStream
71 int _has_injected_fields; // any non static injected fields? lazily initialized.
72
73 // The possible values of the _implementor fall into following three cases:
74 // null: no implementor.
75 // A ciInstanceKlass that's not itself: one implementor.
76 // Itself: more than one implementor.
77 ciInstanceKlass* _implementor;
78 GrowableArray<ciInstanceKlass*>* _transitive_interfaces;
79
80 void compute_injected_fields();
81 bool compute_injected_fields_helper();
82 void compute_transitive_interfaces();
83
84 protected:
85 ciInstanceKlass(Klass* k);
86 ciInstanceKlass(ciSymbol* name, jobject loader);
87
88 InstanceKlass* get_instanceKlass() const {
89 return InstanceKlass::cast(get_Klass());
90 }
91
92 oop loader();
93 jobject loader_handle();
94
95 const char* type_string() { return "ciInstanceKlass"; }
96
97 bool is_in_package_impl(const char* packagename, int len);
98
99 void print_impl(outputStream* st);
100
101 ciConstantPoolCache* field_cache();
102
103 bool is_shared() { return _is_shared; }
104
105 void compute_shared_init_state();
106 bool compute_shared_has_subklass();
107 int compute_nonstatic_fields();
108 GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields);
109 bool compute_has_trusted_loader();
110
111 // Update the init_state for shared klasses
112 void update_if_shared(InstanceKlass::ClassState expected) {
113 if (_is_shared && _init_state != expected) {
114 if (is_loaded()) compute_shared_init_state();
115 }
116 }
117
118 public:
119 // Has this klass been initialized?
120 bool is_initialized() {
121 update_if_shared(InstanceKlass::fully_initialized);
122 return _init_state == InstanceKlass::fully_initialized;
123 }
124 bool is_not_initialized() {
125 update_if_shared(InstanceKlass::fully_initialized);
126 return _init_state < InstanceKlass::being_initialized;
127 }
128 // Is this klass being initialized?
186 } else {
187 return 2;
188 }
189 }
190 bool has_nonstatic_concrete_methods() {
191 assert(is_loaded(), "must be loaded");
192 return _has_nonstatic_concrete_methods;
193 }
194
195 bool is_hidden() const {
196 return _is_hidden;
197 }
198
199 bool is_record() const {
200 return _is_record;
201 }
202
203 ciInstanceKlass* get_canonical_holder(int offset);
204 ciField* get_field_by_offset(int field_offset, bool is_static);
205 ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static);
206
207 // total number of nonstatic fields (including inherited):
208 int nof_nonstatic_fields() {
209 if (_nonstatic_fields == nullptr)
210 return compute_nonstatic_fields();
211 else
212 return _nonstatic_fields->length();
213 }
214
215 bool has_injected_fields() {
216 if (_has_injected_fields == -1) {
217 compute_injected_fields();
218 }
219 return _has_injected_fields > 0 ? true : false;
220 }
221
222 bool has_object_fields() const;
223
224 // nth nonstatic field (presented by ascending address)
225 ciField* nonstatic_field_at(int i) {
226 assert(_nonstatic_fields != nullptr, "");
227 return _nonstatic_fields->at(i);
228 }
229
230 ciInstanceKlass* unique_concrete_subklass();
231 bool has_finalizable_subclass();
232
233 bool contains_field_offset(int offset);
234
235 // Get the instance of java.lang.Class corresponding to
236 // this klass. This instance is used for locking of
237 // synchronized static methods of this klass.
238 ciInstance* java_mirror();
239
240 // Java access flags
241 bool is_public () { return flags().is_public(); }
242 bool is_final () { return flags().is_final(); }
243 bool is_super () { return flags().is_super(); }
244 bool is_interface () { return flags().is_interface(); }
245 bool is_abstract () { return flags().is_abstract(); }
246
247 ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
248 // Note: To find a method from name and type strings, use ciSymbol::make,
249 // but consider adding to vmSymbols.hpp instead.
250
251 bool is_leaf_type();
252 ciInstanceKlass* implementor();
253
254 ciInstanceKlass* unique_implementor() {
255 assert(is_loaded(), "must be loaded");
256 ciInstanceKlass* impl = implementor();
257 return (impl != this ? impl : nullptr);
258 }
259
260 // Is the defining class loader of this class the default loader?
261 bool uses_default_loader() const;
262
263 bool is_java_lang_Object() const;
264
265 BasicType box_klass_type() const;
266 bool is_box_klass() const;
267 bool is_boxed_value_offset(int offset) const;
268
269 // Is this klass in the given package?
270 bool is_in_package(const char* packagename) {
271 return is_in_package(packagename, (int) strlen(packagename));
272 }
273 bool is_in_package(const char* packagename, int len);
274
275 // What kind of ciObject is this?
276 bool is_instance_klass() const { return true; }
277
278 virtual ciKlass* exact_klass() {
279 if (is_loaded() && is_final() && !is_interface()) {
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50
51 jobject _loader;
52
53 InstanceKlass::ClassState _init_state; // state of class
54 bool _is_shared;
55 bool _has_finalizer;
56 SubklassValue _has_subklass;
57 bool _has_nonstatic_fields;
58 bool _has_nonstatic_concrete_methods;
59 bool _is_hidden;
60 bool _is_record;
61 bool _has_trusted_loader;
62
63 ciFlags _flags;
64
65 // Lazy fields get filled in only upon request.
66 ciInstanceKlass* _super;
67 ciInstance* _java_mirror;
68
69 ciConstantPoolCache* _field_cache; // cached map index->field
70
71 // Fields declared in the bytecode (without nested fields in flat fields),
72 // ordered in JavaFieldStream order, with superclasses first (i.e. from lang.java.Object
73 // to most derived class).
74 const GrowableArray<ciField*>* _declared_nonstatic_fields;
75
76 // Fields laid out in memory (flat fields are expanded into their components). The ciField object
77 // for each primitive component has the holder being this ciInstanceKlass or one of its
78 // superclasses.
79 // Fields are in the same order as in _declared_nonstatic_fields, but flat fields are replaced by
80 // the list of their own fields, ordered the same way (hierarchy traversed top-down, in
81 // JavaFieldStream order).
82 const GrowableArray<ciField*>* _nonstatic_fields;
83
84 int _has_injected_fields; // any non static injected fields? lazily initialized.
85
86 // The possible values of the _implementor fall into following three cases:
87 // null: no implementor.
88 // A ciInstanceKlass that's not itself: one implementor.
89 // Itself: more than one implementor.
90 ciInstanceKlass* _implementor;
91 GrowableArray<ciInstanceKlass*>* _transitive_interfaces;
92
93 void compute_injected_fields();
94 bool compute_injected_fields_helper();
95 void compute_transitive_interfaces();
96
97 protected:
98 ciInstanceKlass(Klass* k);
99 ciInstanceKlass(ciSymbol* name, jobject loader, BasicType bt = T_OBJECT); // for unloaded klasses
100
101 InstanceKlass* get_instanceKlass() const {
102 return InstanceKlass::cast(get_Klass());
103 }
104
105 oop loader();
106 jobject loader_handle();
107
108 const char* type_string() { return "ciInstanceKlass"; }
109
110 bool is_in_package_impl(const char* packagename, int len);
111
112 void print_impl(outputStream* st);
113
114 ciConstantPoolCache* field_cache();
115
116 bool is_shared() { return _is_shared; }
117
118 void compute_shared_init_state();
119 bool compute_shared_has_subklass();
120 void compute_nonstatic_fields();
121 void compute_nonstatic_fields_impl(const GrowableArray<ciField*>* super_declared_fields, const GrowableArray<ciField*>* super_fields);
122 bool compute_has_trusted_loader();
123
124 // Update the init_state for shared klasses
125 void update_if_shared(InstanceKlass::ClassState expected) {
126 if (_is_shared && _init_state != expected) {
127 if (is_loaded()) compute_shared_init_state();
128 }
129 }
130
131 public:
132 // Has this klass been initialized?
133 bool is_initialized() {
134 update_if_shared(InstanceKlass::fully_initialized);
135 return _init_state == InstanceKlass::fully_initialized;
136 }
137 bool is_not_initialized() {
138 update_if_shared(InstanceKlass::fully_initialized);
139 return _init_state < InstanceKlass::being_initialized;
140 }
141 // Is this klass being initialized?
199 } else {
200 return 2;
201 }
202 }
203 bool has_nonstatic_concrete_methods() {
204 assert(is_loaded(), "must be loaded");
205 return _has_nonstatic_concrete_methods;
206 }
207
208 bool is_hidden() const {
209 return _is_hidden;
210 }
211
212 bool is_record() const {
213 return _is_record;
214 }
215
216 ciInstanceKlass* get_canonical_holder(int offset);
217 ciField* get_field_by_offset(int field_offset, bool is_static);
218 ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static);
219 // Get field descriptor at field_offset ignoring flattening
220 ciField* get_non_flat_field_by_offset(int field_offset);
221 // Get the index of the declared field that contains this offset
222 int field_index_by_offset(int offset);
223
224 // Total number of nonstatic fields (including inherited)
225 int nof_declared_nonstatic_fields() {
226 if (_declared_nonstatic_fields == nullptr) {
227 compute_nonstatic_fields();
228 }
229 return _declared_nonstatic_fields->length();
230 }
231
232 int nof_nonstatic_fields() {
233 if (_nonstatic_fields == nullptr) {
234 compute_nonstatic_fields();
235 }
236 return _nonstatic_fields->length();
237 }
238
239 bool has_injected_fields() {
240 if (_has_injected_fields == -1) {
241 compute_injected_fields();
242 }
243 return _has_injected_fields > 0 ? true : false;
244 }
245
246 bool has_object_fields() const;
247
248 ciField* declared_nonstatic_field_at(int i) {
249 assert(_declared_nonstatic_fields != nullptr, "should be initialized");
250 return _declared_nonstatic_fields->at(i);
251 }
252
253 ciField* nonstatic_field_at(int i) {
254 assert(_nonstatic_fields != nullptr, "");
255 return _nonstatic_fields->at(i);
256 }
257
258 ciInstanceKlass* unique_concrete_subklass();
259 bool has_finalizable_subclass();
260
261 bool contains_field_offset(int offset);
262
263 // Get the instance of java.lang.Class corresponding to
264 // this klass. This instance is used for locking of
265 // synchronized static methods of this klass.
266 ciInstance* java_mirror();
267
268 // Java access flags
269 bool is_public () { return flags().is_public(); }
270 bool is_final () { return flags().is_final(); }
271 bool is_interface () { return flags().is_interface(); }
272 bool is_abstract () { return flags().is_abstract(); }
273 bool is_abstract_value_klass() { return is_abstract() && !flags().is_identity(); }
274
275 ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
276 // Note: To find a method from name and type strings, use ciSymbol::make,
277 // but consider adding to vmSymbols.hpp instead.
278
279 bool is_leaf_type();
280 ciInstanceKlass* implementor();
281
282 ciInstanceKlass* unique_implementor() {
283 assert(is_loaded(), "must be loaded");
284 ciInstanceKlass* impl = implementor();
285 return (impl != this ? impl : nullptr);
286 }
287
288 virtual bool can_be_inline_klass(bool is_exact = false);
289
290 // Is the defining class loader of this class the default loader?
291 bool uses_default_loader() const;
292
293 bool is_java_lang_Object() const;
294
295 BasicType box_klass_type() const;
296 bool is_box_klass() const;
297 bool is_boxed_value_offset(int offset) const;
298
299 // Is this klass in the given package?
300 bool is_in_package(const char* packagename) {
301 return is_in_package(packagename, (int) strlen(packagename));
302 }
303 bool is_in_package(const char* packagename, int len);
304
305 // What kind of ciObject is this?
306 bool is_instance_klass() const { return true; }
307
308 virtual ciKlass* exact_klass() {
309 if (is_loaded() && is_final() && !is_interface()) {
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