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src/hotspot/share/ci/ciInstanceKlass.hpp

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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   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()) {

 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), ordered by
 72   // offset.
 73   const GrowableArray<ciField*>* _declared_nonstatic_fields;
 74 
 75   // Fields laid out in memory (flat fields are expanded into their components). The ciField object
 76   // for each primitive component has the holder being this ciInstanceKlass or one of its
 77   // superclasses, ordered by offset.
 78   const GrowableArray<ciField*>* _nonstatic_fields;
 79 
 80   int                    _has_injected_fields; // any non static injected fields? lazily initialized.
 81 
 82   // The possible values of the _implementor fall into following three cases:
 83   //   null: no implementor.
 84   //   A ciInstanceKlass that's not itself: one implementor.
 85   //   Itself: more than one implementor.
 86   ciInstanceKlass*       _implementor;
 87   GrowableArray<ciInstanceKlass*>* _transitive_interfaces;
 88 
 89   void compute_injected_fields();
 90   bool compute_injected_fields_helper();
 91   void compute_transitive_interfaces();
 92 
 93 protected:
 94   ciInstanceKlass(Klass* k);
 95   ciInstanceKlass(ciSymbol* name, jobject loader, BasicType bt = T_OBJECT); // for unloaded klasses
 96 
 97   InstanceKlass* get_instanceKlass() const {
 98     return InstanceKlass::cast(get_Klass());
 99   }
100 
101   oop loader();
102   jobject loader_handle();
103 
104   const char* type_string() { return "ciInstanceKlass"; }
105 
106   bool is_in_package_impl(const char* packagename, int len);
107 
108   void print_impl(outputStream* st);
109 
110   ciConstantPoolCache* field_cache();
111 
112   bool is_shared() { return _is_shared; }
113 
114   void compute_shared_init_state();
115   bool compute_shared_has_subklass();
116   void compute_nonstatic_fields();
117   void compute_nonstatic_fields_impl(const GrowableArray<ciField*>* super_declared_fields, const GrowableArray<ciField*>* super_fields);
118   bool compute_has_trusted_loader();
119 
120   // Update the init_state for shared klasses
121   void update_if_shared(InstanceKlass::ClassState expected) {
122     if (_is_shared && _init_state != expected) {
123       if (is_loaded()) compute_shared_init_state();
124     }
125   }
126 
127 public:
128   // Has this klass been initialized?
129   bool                   is_initialized() {
130     update_if_shared(InstanceKlass::fully_initialized);
131     return _init_state == InstanceKlass::fully_initialized;
132   }
133   bool                   is_not_initialized() {
134     update_if_shared(InstanceKlass::fully_initialized);
135     return _init_state < InstanceKlass::being_initialized;
136   }
137   // Is this klass being initialized?

195     } else {
196       return 2;
197     }
198   }
199   bool has_nonstatic_concrete_methods()  {
200     assert(is_loaded(), "must be loaded");
201     return _has_nonstatic_concrete_methods;
202   }
203 
204   bool is_hidden() const {
205     return _is_hidden;
206   }
207 
208   bool is_record() const {
209     return _is_record;
210   }
211 
212   ciInstanceKlass* get_canonical_holder(int offset);
213   ciField* get_field_by_offset(int field_offset, bool is_static);
214   ciField* get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static);
215   // Get field descriptor at field_offset ignoring flattening
216   ciField* get_non_flat_field_by_offset(int field_offset);
217   // Get the index of the declared field that contains this offset
218   int field_index_by_offset(int offset);
219 
220   // Total number of nonstatic fields (including inherited)
221   int nof_declared_nonstatic_fields() {
222     if (_declared_nonstatic_fields == nullptr) {
223       compute_nonstatic_fields();
224     }
225     return _declared_nonstatic_fields->length();
226   }
227 

228   int nof_nonstatic_fields() {
229     if (_nonstatic_fields == nullptr) {
230       compute_nonstatic_fields();
231     }
232     return _nonstatic_fields->length();
233   }
234 
235   bool has_injected_fields() {
236     if (_has_injected_fields == -1) {
237       compute_injected_fields();
238     }
239     return _has_injected_fields > 0 ? true : false;
240   }
241 
242   bool has_object_fields() const;
243 
244   ciField* declared_nonstatic_field_at(int i) {
245     assert(_declared_nonstatic_fields != nullptr, "should be initialized");
246     return _declared_nonstatic_fields->at(i);
247   }
248 
249   ciField* nonstatic_field_at(int i) {
250     assert(_nonstatic_fields != nullptr, "");
251     return _nonstatic_fields->at(i);
252   }
253 
254   ciInstanceKlass* unique_concrete_subklass();
255   bool has_finalizable_subclass();
256 
257   bool contains_field_offset(int offset);
258 
259   // Get the instance of java.lang.Class corresponding to
260   // this klass.  This instance is used for locking of
261   // synchronized static methods of this klass.
262   ciInstance*            java_mirror();
263 
264   // Java access flags
265   bool is_public      () { return flags().is_public(); }
266   bool is_final       () { return flags().is_final(); }

267   bool is_interface   () { return flags().is_interface(); }
268   bool is_abstract    () { return flags().is_abstract(); }
269   bool is_abstract_value_klass() { return is_abstract() && !flags().is_identity(); }
270 
271   ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
272   // Note:  To find a method from name and type strings, use ciSymbol::make,
273   // but consider adding to vmSymbols.hpp instead.
274 
275   bool is_leaf_type();
276   ciInstanceKlass* implementor();
277 
278   ciInstanceKlass* unique_implementor() {
279     assert(is_loaded(), "must be loaded");
280     ciInstanceKlass* impl = implementor();
281     return (impl != this ? impl : nullptr);
282   }
283 
284   virtual bool can_be_inline_klass(bool is_exact = false);
285 
286   // Is the defining class loader of this class the default loader?
287   bool uses_default_loader() const;
288 
289   bool is_java_lang_Object() const;
290 
291   BasicType box_klass_type() const;
292   bool is_box_klass() const;
293   bool is_boxed_value_offset(int offset) const;
294 
295   // Is this klass in the given package?
296   bool is_in_package(const char* packagename) {
297     return is_in_package(packagename, (int) strlen(packagename));
298   }
299   bool is_in_package(const char* packagename, int len);
300 
301   // What kind of ciObject is this?
302   bool is_instance_klass() const { return true; }
303 
304   virtual ciKlass* exact_klass() {
305     if (is_loaded() && is_final() && !is_interface()) {
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