81 // super klass of an array, (j.l.Object) should not have
82 // any overpass methods present.
83 return super()->uncached_lookup_method(name, signature, Klass::skip_overpass, private_mode);
84 }
85
86 ArrayKlass::ArrayKlass(Symbol* name, KlassID id) :
87 Klass(id),
88 _dimension(1),
89 _higher_dimension(NULL),
90 _lower_dimension(NULL) {
91 // Arrays don't add any new methods, so their vtable is the same size as
92 // the vtable of klass Object.
93 set_vtable_length(Universe::base_vtable_size());
94 set_name(name);
95 set_super(Universe::is_bootstrapping() ? NULL : SystemDictionary::Object_klass());
96 set_layout_helper(Klass::_lh_neutral_value);
97 set_is_cloneable(); // All arrays are considered to be cloneable (See JLS 20.1.5)
98 JFR_ONLY(INIT_ID(this);)
99 }
100
101 Symbol* ArrayKlass::create_element_klass_array_name(Klass* element_klass, TRAPS) {
102 Symbol* name = NULL;
103 if (!element_klass->is_instance_klass() ||
104 (name = InstanceKlass::cast(element_klass)->array_name()) == NULL) {
105
106 ResourceMark rm(THREAD);
107 char *name_str = element_klass->name()->as_C_string();
108 int len = element_klass->name()->utf8_length();
109 char *new_str = NEW_RESOURCE_ARRAY(char, len + 4);
110 int idx = 0;
111 new_str[idx++] = '[';
112 if (element_klass->is_instance_klass()) { // it could be an array or simple type
113 // Temporary hack, for arrays of value types, this code should be removed
114 // once value types have their own array types
115 // With Q-descriptors, the code below needs to be reworked.
116 // It is still correct today because the only kind of value array supported
117 // is array of null-free values which map to the Q-signature.
118 // As soon as both arrays of null-free values and arrays of nullable values
119 // are supported, this code has to be rewritten to consider the kind of the
120 // array instead of the kind of the elements.
121 if (element_klass->is_value()) {
122 new_str[idx++] = 'Q';
123 } else {
124 new_str[idx++] = 'L';
125 }
126 }
127 memcpy(&new_str[idx], name_str, len * sizeof(char));
128 idx += len;
129 if (element_klass->is_instance_klass()) {
130 new_str[idx++] = ';';
131 }
132 new_str[idx++] = '\0';
133 name = SymbolTable::new_permanent_symbol(new_str, CHECK_NULL);
134 if (element_klass->is_instance_klass() || element_klass->is_value()) {
135 InstanceKlass* ik = InstanceKlass::cast(element_klass);
136 ik->set_array_name(name);
137 }
138 }
139
140 return name;
141 }
142
143 // Initialization of vtables and mirror object is done separatly from base_create_array_klass,
144 // since a GC can happen. At this point all instance variables of the ArrayKlass must be setup.
145 void ArrayKlass::complete_create_array_klass(ArrayKlass* k, Klass* super_klass, ModuleEntry* module_entry, TRAPS) {
146 k->initialize_supers(super_klass, NULL, CHECK);
147 k->vtable().initialize_vtable(false, CHECK);
148
149 // During bootstrapping, before java.base is defined, the module_entry may not be present yet.
150 // These classes will be put on a fixup list and their module fields will be patched once
151 // java.base is defined.
152 assert((module_entry != NULL) || ((module_entry == NULL) && !ModuleEntryTable::javabase_defined()),
153 "module entry not available post " JAVA_BASE_NAME " definition");
154 oop module = (module_entry != NULL) ? module_entry->module() : (oop)NULL;
155 java_lang_Class::create_mirror(k, Handle(THREAD, k->class_loader()), Handle(THREAD, module), Handle(), CHECK);
156 }
157
158 GrowableArray<Klass*>* ArrayKlass::compute_secondary_supers(int num_extra_slots,
159 Array<InstanceKlass*>* transitive_interfaces) {
160 // interfaces = { cloneable_klass, serializable_klass };
161 assert(num_extra_slots == 0, "sanity of primitive array type");
162 assert(transitive_interfaces == NULL, "sanity");
163 // Must share this for correct bootstrapping!
164 set_secondary_supers(Universe::the_array_interfaces_array());
165 return NULL;
166 }
167
168 objArrayOop ArrayKlass::allocate_arrayArray(int n, int length, TRAPS) {
169 check_array_allocation_length(length, arrayOopDesc::max_array_length(T_ARRAY), CHECK_0);
170 int size = objArrayOopDesc::object_size(length);
171 Klass* k = array_klass(n+dimension(), CHECK_0);
172 ArrayKlass* ak = ArrayKlass::cast(k);
173 objArrayOop o = (objArrayOop)Universe::heap()->array_allocate(ak, size, length,
174 /* do_zero */ true, CHECK_0);
175 // initialization to NULL not necessary, area already cleared
176 return o;
177 }
178
179 void ArrayKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) {
180 Klass* k = this;
181 // Iterate over this array klass and all higher dimensions
182 while (k != NULL) {
183 f(k, CHECK);
184 k = ArrayKlass::cast(k)->higher_dimension();
185 }
186 }
187
188 void ArrayKlass::array_klasses_do(void f(Klass* k)) {
189 Klass* k = this;
190 // Iterate over this array klass and all higher dimensions
191 while (k != NULL) {
192 f(k);
193 k = ArrayKlass::cast(k)->higher_dimension();
194 }
195 }
196
197 // JVM support
198
199 jint ArrayKlass::compute_modifier_flags(TRAPS) const {
200 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
201 }
202
203 // JVMTI support
204
205 jint ArrayKlass::jvmti_class_status() const {
|
81 // super klass of an array, (j.l.Object) should not have
82 // any overpass methods present.
83 return super()->uncached_lookup_method(name, signature, Klass::skip_overpass, private_mode);
84 }
85
86 ArrayKlass::ArrayKlass(Symbol* name, KlassID id) :
87 Klass(id),
88 _dimension(1),
89 _higher_dimension(NULL),
90 _lower_dimension(NULL) {
91 // Arrays don't add any new methods, so their vtable is the same size as
92 // the vtable of klass Object.
93 set_vtable_length(Universe::base_vtable_size());
94 set_name(name);
95 set_super(Universe::is_bootstrapping() ? NULL : SystemDictionary::Object_klass());
96 set_layout_helper(Klass::_lh_neutral_value);
97 set_is_cloneable(); // All arrays are considered to be cloneable (See JLS 20.1.5)
98 JFR_ONLY(INIT_ID(this);)
99 }
100
101 Symbol* ArrayKlass::create_element_klass_array_name(bool is_qtype, Klass* element_klass, TRAPS) {
102 Symbol* name = NULL;
103 if (!element_klass->is_instance_klass() || is_qtype ||
104 (name = InstanceKlass::cast(element_klass)->array_name()) == NULL) {
105
106 ResourceMark rm(THREAD);
107 char *name_str = element_klass->name()->as_C_string();
108 int len = element_klass->name()->utf8_length();
109 char *new_str = NEW_RESOURCE_ARRAY(char, len + 4);
110 int idx = 0;
111 new_str[idx++] = '[';
112 if (element_klass->is_instance_klass()) { // it could be an array or simple type
113 if (is_qtype) {
114 new_str[idx++] = 'Q';
115 } else {
116 new_str[idx++] = 'L';
117 }
118 }
119 memcpy(&new_str[idx], name_str, len * sizeof(char));
120 idx += len;
121 if (element_klass->is_instance_klass()) {
122 new_str[idx++] = ';';
123 }
124 new_str[idx++] = '\0';
125 name = SymbolTable::new_permanent_symbol(new_str, CHECK_NULL);
126 if (element_klass->is_instance_klass() && (!is_qtype)) {
127 InstanceKlass* ik = InstanceKlass::cast(element_klass);
128 ik->set_array_name(name); // CMH: only cache and deref array_name for L-type...missing for Q-type
129 }
130 }
131
132 return name;
133 }
134
135 // Initialization of vtables and mirror object is done separatly from base_create_array_klass,
136 // since a GC can happen. At this point all instance variables of the ArrayKlass must be setup.
137 void ArrayKlass::complete_create_array_klass(ArrayKlass* k, Klass* super_klass, ModuleEntry* module_entry, TRAPS) {
138 k->initialize_supers(super_klass, NULL, CHECK);
139 k->vtable().initialize_vtable(false, CHECK);
140
141 // During bootstrapping, before java.base is defined, the module_entry may not be present yet.
142 // These classes will be put on a fixup list and their module fields will be patched once
143 // java.base is defined.
144 assert((module_entry != NULL) || ((module_entry == NULL) && !ModuleEntryTable::javabase_defined()),
145 "module entry not available post " JAVA_BASE_NAME " definition");
146 oop module = (module_entry != NULL) ? module_entry->module() : (oop)NULL;
147 java_lang_Class::create_mirror(k, Handle(THREAD, k->class_loader()), Handle(THREAD, module), Handle(), CHECK);
148 }
149
150 GrowableArray<Klass*>* ArrayKlass::compute_secondary_supers(int num_extra_slots,
151 Array<InstanceKlass*>* transitive_interfaces) {
152 // interfaces = { cloneable_klass, serializable_klass };
153 assert(num_extra_slots == 0, "sanity of primitive array type");
154 assert(transitive_interfaces == NULL, "sanity");
155 // Must share this for correct bootstrapping!
156 set_secondary_supers(Universe::the_array_interfaces_array());
157 return NULL;
158 }
159
160 objArrayOop ArrayKlass::allocate_arrayArray(int n, int length, TRAPS) {
161 check_array_allocation_length(length, arrayOopDesc::max_array_length(T_ARRAY), CHECK_0);
162 int size = objArrayOopDesc::object_size(length);
163 Klass* k = array_klass(FieldType::get_array_storage_properties(name()), n+dimension(), CHECK_0);
164 ArrayKlass* ak = ArrayKlass::cast(k);
165 objArrayOop o = (objArrayOop)Universe::heap()->array_allocate(ak, size, length,
166 /* do_zero */ true, CHECK_0);
167 // initialization to NULL not necessary, area already cleared
168 return o;
169 }
170
171 void ArrayKlass::array_klasses_do(void f(Klass* k)) {
172 Klass* k = this;
173 // Iterate over this array klass and all higher dimensions
174 while (k != NULL) {
175 f(k);
176 k = ArrayKlass::cast(k)->higher_dimension();
177 }
178 }
179
180 // JVM support
181
182 jint ArrayKlass::compute_modifier_flags(TRAPS) const {
183 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
184 }
185
186 // JVMTI support
187
188 jint ArrayKlass::jvmti_class_status() const {
|