10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/cdsConfig.hpp"
27 #include "cds/metaspaceShared.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/vmClasses.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "gc/shared/collectedHeap.inline.hpp"
33 #include "jvmtifiles/jvmti.h"
34 #include "memory/metaspaceClosure.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "memory/universe.hpp"
37 #include "oops/arrayKlass.inline.hpp"
38 #include "oops/arrayOop.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/klass.inline.hpp"
41 #include "oops/objArrayOop.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "runtime/handles.inline.hpp"
44
45 void* ArrayKlass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) throw() {
46 return Metaspace::allocate(loader_data, word_size, MetaspaceObj::ClassType, true, THREAD);
47 }
48
49 ArrayKlass::ArrayKlass() {
50 assert(CDSConfig::is_dumping_static_archive() || CDSConfig::is_using_archive(), "only for CDS");
51 }
52
53 int ArrayKlass::static_size(int header_size) {
54 // size of an array klass object
55 assert(header_size <= InstanceKlass::header_size(), "bad header size");
56 // If this assert fails, see comments in base_create_array_klass.
57 header_size = InstanceKlass::header_size();
58 int vtable_len = Universe::base_vtable_size();
59 int size = header_size + vtable_len;
60 return align_metadata_size(size);
92 // any overpass methods present.
93 return super()->uncached_lookup_method(name, signature, OverpassLookupMode::skip, private_mode);
94 }
95
96 ArrayKlass::ArrayKlass(Symbol* name, KlassKind kind) :
97 Klass(kind),
98 _dimension(1),
99 _higher_dimension(nullptr),
100 _lower_dimension(nullptr) {
101 // Arrays don't add any new methods, so their vtable is the same size as
102 // the vtable of klass Object.
103 set_vtable_length(Universe::base_vtable_size());
104 set_name(name);
105 set_super(Universe::is_bootstrapping() ? nullptr : vmClasses::Object_klass());
106 set_layout_helper(Klass::_lh_neutral_value);
107 set_is_cloneable(); // All arrays are considered to be cloneable (See JLS 20.1.5)
108 JFR_ONLY(INIT_ID(this);)
109 log_array_class_load(this);
110 }
111
112
113 // Initialization of vtables and mirror object is done separately from base_create_array_klass,
114 // since a GC can happen. At this point all instance variables of the ArrayKlass must be setup.
115 void ArrayKlass::complete_create_array_klass(ArrayKlass* k, Klass* super_klass, ModuleEntry* module_entry, TRAPS) {
116 k->initialize_supers(super_klass, nullptr, CHECK);
117 k->vtable().initialize_vtable();
118
119 // During bootstrapping, before java.base is defined, the module_entry may not be present yet.
120 // These classes will be put on a fixup list and their module fields will be patched once
121 // java.base is defined.
122 assert((module_entry != nullptr) || ((module_entry == nullptr) && !ModuleEntryTable::javabase_defined()),
123 "module entry not available post " JAVA_BASE_NAME " definition");
124 oop module = (module_entry != nullptr) ? module_entry->module() : (oop)nullptr;
125 java_lang_Class::create_mirror(k, Handle(THREAD, k->class_loader()), Handle(THREAD, module), Handle(), Handle(), CHECK);
126 }
127
128 ArrayKlass* ArrayKlass::array_klass(int n, TRAPS) {
129
130 assert(dimension() <= n, "check order of chain");
131 int dim = dimension();
132 if (dim == n) return this;
133
134 // lock-free read needs acquire semantics
135 if (higher_dimension_acquire() == nullptr) {
136
137 // Ensure atomic creation of higher dimensions
138 RecursiveLocker rl(MultiArray_lock, THREAD);
139
140 if (higher_dimension() == nullptr) {
141 // Create multi-dim klass object and link them together
142 ObjArrayKlass* ak =
143 ObjArrayKlass::allocate_objArray_klass(class_loader_data(), dim + 1, this, CHECK_NULL);
144 // use 'release' to pair with lock-free load
145 release_set_higher_dimension(ak);
146 assert(ak->lower_dimension() == this, "lower dimension mismatch");
147 }
148 }
149
150 ObjArrayKlass* ak = higher_dimension();
151 assert(ak != nullptr, "should be set");
152 THREAD->check_possible_safepoint();
153 return ak->array_klass(n, THREAD);
154 }
155
156 ArrayKlass* ArrayKlass::array_klass_or_null(int n) {
157
158 assert(dimension() <= n, "check order of chain");
159 int dim = dimension();
160 if (dim == n) return this;
161
162 // lock-free read needs acquire semantics
163 if (higher_dimension_acquire() == nullptr) {
181 Array<InstanceKlass*>* transitive_interfaces) {
182 // interfaces = { cloneable_klass, serializable_klass };
183 assert(num_extra_slots == 0, "sanity of primitive array type");
184 assert(transitive_interfaces == nullptr, "sanity");
185 // Must share this for correct bootstrapping!
186 set_secondary_supers(Universe::the_array_interfaces_array(),
187 Universe::the_array_interfaces_bitmap());
188 return nullptr;
189 }
190
191 objArrayOop ArrayKlass::allocate_arrayArray(int n, int length, TRAPS) {
192 check_array_allocation_length(length, arrayOopDesc::max_array_length(T_ARRAY), CHECK_NULL);
193 size_t size = objArrayOopDesc::object_size(length);
194 ArrayKlass* ak = array_klass(n + dimension(), CHECK_NULL);
195 objArrayOop o = (objArrayOop)Universe::heap()->array_allocate(ak, size, length,
196 /* do_zero */ true, CHECK_NULL);
197 // initialization to null not necessary, area already cleared
198 return o;
199 }
200
201 jint ArrayKlass::compute_modifier_flags() const {
202 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
203 }
204
205 // JVMTI support
206
207 jint ArrayKlass::jvmti_class_status() const {
208 return JVMTI_CLASS_STATUS_ARRAY;
209 }
210
211 void ArrayKlass::metaspace_pointers_do(MetaspaceClosure* it) {
212 Klass::metaspace_pointers_do(it);
213
214 ResourceMark rm;
215 log_trace(cds)("Iter(ArrayKlass): %p (%s)", this, external_name());
216
217 // need to cast away volatile
218 it->push((Klass**)&_higher_dimension);
219 it->push((Klass**)&_lower_dimension);
220 }
221
222 #if INCLUDE_CDS
|
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/cdsConfig.hpp"
27 #include "cds/metaspaceShared.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/symbolTable.hpp"
31 #include "classfile/vmClasses.hpp"
32 #include "classfile/vmSymbols.hpp"
33 #include "gc/shared/collectedHeap.inline.hpp"
34 #include "jvmtifiles/jvmti.h"
35 #include "memory/metaspaceClosure.hpp"
36 #include "memory/resourceArea.hpp"
37 #include "memory/universe.hpp"
38 #include "oops/arrayKlass.inline.hpp"
39 #include "oops/arrayOop.hpp"
40 #include "oops/instanceKlass.hpp"
41 #include "oops/klass.inline.hpp"
42 #include "oops/objArrayKlass.hpp"
43 #include "oops/objArrayOop.hpp"
44 #include "oops/oop.inline.hpp"
45 #include "runtime/handles.inline.hpp"
46
47 void* ArrayKlass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) throw() {
48 return Metaspace::allocate(loader_data, word_size, MetaspaceObj::ClassType, true, THREAD);
49 }
50
51 ArrayKlass::ArrayKlass() {
52 assert(CDSConfig::is_dumping_static_archive() || CDSConfig::is_using_archive(), "only for CDS");
53 }
54
55 int ArrayKlass::static_size(int header_size) {
56 // size of an array klass object
57 assert(header_size <= InstanceKlass::header_size(), "bad header size");
58 // If this assert fails, see comments in base_create_array_klass.
59 header_size = InstanceKlass::header_size();
60 int vtable_len = Universe::base_vtable_size();
61 int size = header_size + vtable_len;
62 return align_metadata_size(size);
94 // any overpass methods present.
95 return super()->uncached_lookup_method(name, signature, OverpassLookupMode::skip, private_mode);
96 }
97
98 ArrayKlass::ArrayKlass(Symbol* name, KlassKind kind) :
99 Klass(kind),
100 _dimension(1),
101 _higher_dimension(nullptr),
102 _lower_dimension(nullptr) {
103 // Arrays don't add any new methods, so their vtable is the same size as
104 // the vtable of klass Object.
105 set_vtable_length(Universe::base_vtable_size());
106 set_name(name);
107 set_super(Universe::is_bootstrapping() ? nullptr : vmClasses::Object_klass());
108 set_layout_helper(Klass::_lh_neutral_value);
109 set_is_cloneable(); // All arrays are considered to be cloneable (See JLS 20.1.5)
110 JFR_ONLY(INIT_ID(this);)
111 log_array_class_load(this);
112 }
113
114 Symbol* ArrayKlass::create_element_klass_array_name(Klass* element_klass, TRAPS) {
115 ResourceMark rm(THREAD);
116 Symbol* name = nullptr;
117 char *name_str = element_klass->name()->as_C_string();
118 int len = element_klass->name()->utf8_length();
119 char *new_str = NEW_RESOURCE_ARRAY(char, len + 4);
120 int idx = 0;
121 new_str[idx++] = JVM_SIGNATURE_ARRAY;
122 if (element_klass->is_instance_klass()) { // it could be an array or simple type
123 new_str[idx++] = JVM_SIGNATURE_CLASS;
124 }
125 memcpy(&new_str[idx], name_str, len * sizeof(char));
126 idx += len;
127 if (element_klass->is_instance_klass()) {
128 new_str[idx++] = JVM_SIGNATURE_ENDCLASS;
129 }
130 new_str[idx++] = '\0';
131 return SymbolTable::new_symbol(new_str);
132 }
133
134 // Initialization of vtables and mirror object is done separately from base_create_array_klass,
135 // since a GC can happen. At this point all instance variables of the ArrayKlass must be setup.
136 void ArrayKlass::complete_create_array_klass(ArrayKlass* k, Klass* super_klass, ModuleEntry* module_entry, TRAPS) {
137 k->initialize_supers(super_klass, nullptr, CHECK);
138 k->vtable().initialize_vtable();
139
140 // During bootstrapping, before java.base is defined, the module_entry may not be present yet.
141 // These classes will be put on a fixup list and their module fields will be patched once
142 // java.base is defined.
143 assert((module_entry != nullptr) || ((module_entry == nullptr) && !ModuleEntryTable::javabase_defined()),
144 "module entry not available post " JAVA_BASE_NAME " definition");
145 oop module = (module_entry != nullptr) ? module_entry->module() : (oop)nullptr;
146 java_lang_Class::create_mirror(k, Handle(THREAD, k->class_loader()), Handle(THREAD, module), Handle(), Handle(), CHECK);
147 }
148
149 ArrayKlass* ArrayKlass::array_klass(int n, TRAPS) {
150
151 assert(dimension() <= n, "check order of chain");
152 int dim = dimension();
153 if (dim == n) return this;
154
155 // lock-free read needs acquire semantics
156 if (higher_dimension_acquire() == nullptr) {
157
158 // Ensure atomic creation of higher dimensions
159 RecursiveLocker rl(MultiArray_lock, THREAD);
160
161 if (higher_dimension() == nullptr) {
162 // Create multi-dim klass object and link them together
163 ObjArrayKlass* ak =
164 ObjArrayKlass::allocate_objArray_klass(class_loader_data(), dim + 1, this, false, CHECK_NULL);
165 // use 'release' to pair with lock-free load
166 release_set_higher_dimension(ak);
167 assert(ak->lower_dimension() == this, "lower dimension mismatch");
168 }
169 }
170
171 ObjArrayKlass* ak = higher_dimension();
172 assert(ak != nullptr, "should be set");
173 THREAD->check_possible_safepoint();
174 return ak->array_klass(n, THREAD);
175 }
176
177 ArrayKlass* ArrayKlass::array_klass_or_null(int n) {
178
179 assert(dimension() <= n, "check order of chain");
180 int dim = dimension();
181 if (dim == n) return this;
182
183 // lock-free read needs acquire semantics
184 if (higher_dimension_acquire() == nullptr) {
202 Array<InstanceKlass*>* transitive_interfaces) {
203 // interfaces = { cloneable_klass, serializable_klass };
204 assert(num_extra_slots == 0, "sanity of primitive array type");
205 assert(transitive_interfaces == nullptr, "sanity");
206 // Must share this for correct bootstrapping!
207 set_secondary_supers(Universe::the_array_interfaces_array(),
208 Universe::the_array_interfaces_bitmap());
209 return nullptr;
210 }
211
212 objArrayOop ArrayKlass::allocate_arrayArray(int n, int length, TRAPS) {
213 check_array_allocation_length(length, arrayOopDesc::max_array_length(T_ARRAY), CHECK_NULL);
214 size_t size = objArrayOopDesc::object_size(length);
215 ArrayKlass* ak = array_klass(n + dimension(), CHECK_NULL);
216 objArrayOop o = (objArrayOop)Universe::heap()->array_allocate(ak, size, length,
217 /* do_zero */ true, CHECK_NULL);
218 // initialization to null not necessary, area already cleared
219 return o;
220 }
221
222 oop ArrayKlass::component_mirror() const {
223 return java_lang_Class::component_mirror(java_mirror());
224 }
225
226 jint ArrayKlass::compute_modifier_flags() const {
227 int identity_flag = (Arguments::enable_preview()) ? JVM_ACC_IDENTITY : 0;
228
229 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC
230 | identity_flag;
231 }
232
233 // JVMTI support
234
235 jint ArrayKlass::jvmti_class_status() const {
236 return JVMTI_CLASS_STATUS_ARRAY;
237 }
238
239 void ArrayKlass::metaspace_pointers_do(MetaspaceClosure* it) {
240 Klass::metaspace_pointers_do(it);
241
242 ResourceMark rm;
243 log_trace(cds)("Iter(ArrayKlass): %p (%s)", this, external_name());
244
245 // need to cast away volatile
246 it->push((Klass**)&_higher_dimension);
247 it->push((Klass**)&_lower_dimension);
248 }
249
250 #if INCLUDE_CDS
|