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 "classfile/moduleEntry.hpp"
27 #include "classfile/packageEntry.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/vmClasses.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "gc/shared/collectedHeap.inline.hpp"
32 #include "memory/iterator.inline.hpp"
33 #include "memory/metadataFactory.hpp"
34 #include "memory/metaspaceClosure.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "memory/universe.hpp"
37 #include "oops/arrayKlass.inline.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/klass.inline.hpp"
40 #include "oops/objArrayKlass.inline.hpp"
41 #include "oops/objArrayOop.inline.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "oops/symbol.hpp"
44 #include "runtime/handles.inline.hpp"
45 #include "runtime/mutexLocker.hpp"
46 #include "utilities/macros.hpp"
47
48 ObjArrayKlass* ObjArrayKlass::allocate(ClassLoaderData* loader_data, int n, Klass* k, Symbol* name, TRAPS) {
49 assert(ObjArrayKlass::header_size() <= InstanceKlass::header_size(),
50 "array klasses must be same size as InstanceKlass");
51
52 int size = ArrayKlass::static_size(ObjArrayKlass::header_size());
53
54 return new (loader_data, size, THREAD) ObjArrayKlass(n, k, name);
55 }
56
57 ObjArrayKlass* ObjArrayKlass::allocate_objArray_klass(ClassLoaderData* loader_data,
58 int n, Klass* element_klass, TRAPS) {
59
60 // Eagerly allocate the direct array supertype.
61 Klass* super_klass = NULL;
62 if (!Universe::is_bootstrapping() || vmClasses::Object_klass_loaded()) {
63 Klass* element_super = element_klass->super();
64 if (element_super != NULL) {
65 // The element type has a direct super. E.g., String[] has direct super of Object[].
66 super_klass = element_super->array_klass_or_null();
67 bool supers_exist = super_klass != NULL;
68 // Also, see if the element has secondary supertypes.
69 // We need an array type for each.
70 const Array<Klass*>* element_supers = element_klass->secondary_supers();
71 for( int i = element_supers->length()-1; i >= 0; i-- ) {
72 Klass* elem_super = element_supers->at(i);
73 if (elem_super->array_klass_or_null() == NULL) {
74 supers_exist = false;
75 break;
76 }
77 }
78 if (!supers_exist) {
79 // Oops. Not allocated yet. Back out, allocate it, and retry.
80 Klass* ek = NULL;
81 {
82 MutexUnlocker mu(MultiArray_lock);
83 super_klass = element_super->array_klass(CHECK_NULL);
84 for( int i = element_supers->length()-1; i >= 0; i-- ) {
85 Klass* elem_super = element_supers->at(i);
86 elem_super->array_klass(CHECK_NULL);
87 }
88 // Now retry from the beginning
89 ek = element_klass->array_klass(n, CHECK_NULL);
90 } // re-lock
91 return ObjArrayKlass::cast(ek);
92 }
93 } else {
94 // The element type is already Object. Object[] has direct super of Object.
95 super_klass = vmClasses::Object_klass();
96 }
97 }
98
99 // Create type name for klass.
100 Symbol* name = NULL;
101 {
102 ResourceMark rm(THREAD);
103 char *name_str = element_klass->name()->as_C_string();
104 int len = element_klass->name()->utf8_length();
105 char *new_str = NEW_RESOURCE_ARRAY(char, len + 4);
106 int idx = 0;
107 new_str[idx++] = JVM_SIGNATURE_ARRAY;
108 if (element_klass->is_instance_klass()) { // it could be an array or simple type
109 new_str[idx++] = JVM_SIGNATURE_CLASS;
110 }
111 memcpy(&new_str[idx], name_str, len * sizeof(char));
112 idx += len;
113 if (element_klass->is_instance_klass()) {
114 new_str[idx++] = JVM_SIGNATURE_ENDCLASS;
115 }
116 new_str[idx++] = '\0';
117 name = SymbolTable::new_symbol(new_str);
118 }
119
120 // Initialize instance variables
121 ObjArrayKlass* oak = ObjArrayKlass::allocate(loader_data, n, element_klass, name, CHECK_NULL);
122
123 ModuleEntry* module = oak->module();
124 assert(module != NULL, "No module entry for array");
125
126 // Call complete_create_array_klass after all instance variables has been initialized.
127 ArrayKlass::complete_create_array_klass(oak, super_klass, module, CHECK_NULL);
128
129 // Add all classes to our internal class loader list here,
130 // including classes in the bootstrap (NULL) class loader.
131 // Do this step after creating the mirror so that if the
132 // mirror creation fails, loaded_classes_do() doesn't find
133 // an array class without a mirror.
134 loader_data->add_class(oak);
135
136 return oak;
137 }
138
139 ObjArrayKlass::ObjArrayKlass(int n, Klass* element_klass, Symbol* name) : ArrayKlass(name, ID) {
140 set_dimension(n);
141 set_element_klass(element_klass);
142
143 Klass* bk;
144 if (element_klass->is_objArray_klass()) {
145 bk = ObjArrayKlass::cast(element_klass)->bottom_klass();
146 } else {
147 bk = element_klass;
148 }
149 assert(bk != NULL && (bk->is_instance_klass() || bk->is_typeArray_klass()), "invalid bottom klass");
150 set_bottom_klass(bk);
151 set_class_loader_data(bk->class_loader_data());
152
153 set_layout_helper(array_layout_helper(T_OBJECT));
154 assert(is_array_klass(), "sanity");
155 assert(is_objArray_klass(), "sanity");
156 }
157
158 size_t ObjArrayKlass::oop_size(oop obj) const {
159 assert(obj->is_objArray(), "must be object array");
160 return objArrayOop(obj)->object_size();
161 }
162
163 objArrayOop ObjArrayKlass::allocate(int length, TRAPS) {
164 check_array_allocation_length(length, arrayOopDesc::max_array_length(T_OBJECT), CHECK_NULL);
165 size_t size = objArrayOopDesc::object_size(length);
166 return (objArrayOop)Universe::heap()->array_allocate(this, size, length,
167 /* do_zero */ true, THREAD);
168 }
169
170 oop ObjArrayKlass::multi_allocate(int rank, jint* sizes, TRAPS) {
171 int length = *sizes;
172 // Call to lower_dimension uses this pointer, so most be called before a
173 // possible GC
174 Klass* ld_klass = lower_dimension();
175 // If length < 0 allocate will throw an exception.
176 objArrayOop array = allocate(length, CHECK_NULL);
177 objArrayHandle h_array (THREAD, array);
178 if (rank > 1) {
179 if (length != 0) {
180 for (int index = 0; index < length; index++) {
181 ArrayKlass* ak = ArrayKlass::cast(ld_klass);
182 oop sub_array = ak->multi_allocate(rank-1, &sizes[1], CHECK_NULL);
183 h_array->obj_at_put(index, sub_array);
184 }
185 } else {
186 // Since this array dimension has zero length, nothing will be
187 // allocated, however the lower dimension values must be checked
188 // for illegal values.
189 for (int i = 0; i < rank - 1; ++i) {
190 sizes += 1;
191 if (*sizes < 0) {
192 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", *sizes));
193 }
194 }
195 }
196 }
197 return h_array();
198 }
199
200 // Either oop or narrowOop depending on UseCompressedOops.
201 void ObjArrayKlass::do_copy(arrayOop s, size_t src_offset,
202 arrayOop d, size_t dst_offset, int length, TRAPS) {
203 if (s == d) {
204 // since source and destination are equal we do not need conversion checks.
205 assert(length > 0, "sanity check");
206 ArrayAccess<>::oop_arraycopy(s, src_offset, d, dst_offset, length);
207 } else {
208 // We have to make sure all elements conform to the destination array
209 Klass* bound = ObjArrayKlass::cast(d->klass())->element_klass();
210 Klass* stype = ObjArrayKlass::cast(s->klass())->element_klass();
211 if (stype == bound || stype->is_subtype_of(bound)) {
212 // elements are guaranteed to be subtypes, so no check necessary
213 ArrayAccess<ARRAYCOPY_DISJOINT>::oop_arraycopy(s, src_offset, d, dst_offset, length);
214 } else {
215 // slow case: need individual subtype checks
216 // note: don't use obj_at_put below because it includes a redundant store check
217 if (!ArrayAccess<ARRAYCOPY_DISJOINT | ARRAYCOPY_CHECKCAST>::oop_arraycopy(s, src_offset, d, dst_offset, length)) {
218 ResourceMark rm(THREAD);
219 stringStream ss;
220 if (!bound->is_subtype_of(stype)) {
221 ss.print("arraycopy: type mismatch: can not copy %s[] into %s[]",
222 stype->external_name(), bound->external_name());
223 } else {
224 // oop_arraycopy should return the index in the source array that
225 // contains the problematic oop.
226 ss.print("arraycopy: element type mismatch: can not cast one of the elements"
227 " of %s[] to the type of the destination array, %s",
228 stype->external_name(), bound->external_name());
229 }
230 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
231 }
232 }
233 }
234 }
235
236 void ObjArrayKlass::copy_array(arrayOop s, int src_pos, arrayOop d,
237 int dst_pos, int length, TRAPS) {
238 assert(s->is_objArray(), "must be obj array");
239
240 if (!d->is_objArray()) {
241 ResourceMark rm(THREAD);
242 stringStream ss;
243 if (d->is_typeArray()) {
244 ss.print("arraycopy: type mismatch: can not copy object array[] into %s[]",
245 type2name_tab[ArrayKlass::cast(d->klass())->element_type()]);
246 } else {
247 ss.print("arraycopy: destination type %s is not an array", d->klass()->external_name());
248 }
249 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
250 }
251
252 // Check is all offsets and lengths are non negative
253 if (src_pos < 0 || dst_pos < 0 || length < 0) {
254 // Pass specific exception reason.
255 ResourceMark rm(THREAD);
256 stringStream ss;
257 if (src_pos < 0) {
258 ss.print("arraycopy: source index %d out of bounds for object array[%d]",
259 src_pos, s->length());
292 size_t src_offset = (size_t) objArrayOopDesc::obj_at_offset<narrowOop>(src_pos);
293 size_t dst_offset = (size_t) objArrayOopDesc::obj_at_offset<narrowOop>(dst_pos);
294 assert(arrayOopDesc::obj_offset_to_raw<narrowOop>(s, src_offset, NULL) ==
295 objArrayOop(s)->obj_at_addr<narrowOop>(src_pos), "sanity");
296 assert(arrayOopDesc::obj_offset_to_raw<narrowOop>(d, dst_offset, NULL) ==
297 objArrayOop(d)->obj_at_addr<narrowOop>(dst_pos), "sanity");
298 do_copy(s, src_offset, d, dst_offset, length, CHECK);
299 } else {
300 size_t src_offset = (size_t) objArrayOopDesc::obj_at_offset<oop>(src_pos);
301 size_t dst_offset = (size_t) objArrayOopDesc::obj_at_offset<oop>(dst_pos);
302 assert(arrayOopDesc::obj_offset_to_raw<oop>(s, src_offset, NULL) ==
303 objArrayOop(s)->obj_at_addr<oop>(src_pos), "sanity");
304 assert(arrayOopDesc::obj_offset_to_raw<oop>(d, dst_offset, NULL) ==
305 objArrayOop(d)->obj_at_addr<oop>(dst_pos), "sanity");
306 do_copy(s, src_offset, d, dst_offset, length, CHECK);
307 }
308 }
309
310
311 Klass* ObjArrayKlass::array_klass(int n, TRAPS) {
312
313 assert(dimension() <= n, "check order of chain");
314 int dim = dimension();
315 if (dim == n) return this;
316
317 // lock-free read needs acquire semantics
318 if (higher_dimension_acquire() == NULL) {
319
320 ResourceMark rm(THREAD);
321 {
322 // Ensure atomic creation of higher dimensions
323 MutexLocker mu(THREAD, MultiArray_lock);
324
325 // Check if another thread beat us
326 if (higher_dimension() == NULL) {
327
328 // Create multi-dim klass object and link them together
329 Klass* k =
330 ObjArrayKlass::allocate_objArray_klass(class_loader_data(), dim + 1, this, CHECK_NULL);
331 ObjArrayKlass* ak = ObjArrayKlass::cast(k);
332 ak->set_lower_dimension(this);
333 // use 'release' to pair with lock-free load
334 release_set_higher_dimension(ak);
335 assert(ak->is_objArray_klass(), "incorrect initialization of ObjArrayKlass");
336 }
337 }
338 }
339
340 ObjArrayKlass *ak = ObjArrayKlass::cast(higher_dimension());
341 THREAD->check_possible_safepoint();
342 return ak->array_klass(n, THREAD);
343 }
344
345 Klass* ObjArrayKlass::array_klass_or_null(int n) {
346
347 assert(dimension() <= n, "check order of chain");
348 int dim = dimension();
349 if (dim == n) return this;
350
420 return (element_flags & (JVM_ACC_PUBLIC | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED))
421 | (JVM_ACC_ABSTRACT | JVM_ACC_FINAL);
422 }
423
424 ModuleEntry* ObjArrayKlass::module() const {
425 assert(bottom_klass() != NULL, "ObjArrayKlass returned unexpected NULL bottom_klass");
426 // The array is defined in the module of its bottom class
427 return bottom_klass()->module();
428 }
429
430 PackageEntry* ObjArrayKlass::package() const {
431 assert(bottom_klass() != NULL, "ObjArrayKlass returned unexpected NULL bottom_klass");
432 return bottom_klass()->package();
433 }
434
435 // Printing
436
437 void ObjArrayKlass::print_on(outputStream* st) const {
438 #ifndef PRODUCT
439 Klass::print_on(st);
440 st->print(" - instance klass: ");
441 element_klass()->print_value_on(st);
442 st->cr();
443 #endif //PRODUCT
444 }
445
446 void ObjArrayKlass::print_value_on(outputStream* st) const {
447 assert(is_klass(), "must be klass");
448
449 element_klass()->print_value_on(st);
450 st->print("[]");
451 }
452
453 #ifndef PRODUCT
454
455 void ObjArrayKlass::oop_print_on(oop obj, outputStream* st) {
456 ArrayKlass::oop_print_on(obj, st);
457 assert(obj->is_objArray(), "must be objArray");
458 objArrayOop oa = objArrayOop(obj);
459 int print_len = MIN2((intx) oa->length(), MaxElementPrintSize);
460 for(int index = 0; index < print_len; index++) {
482 st->print("[%d] ", len);
483 if (obj != NULL) {
484 obj->print_address_on(st);
485 } else {
486 st->print_cr("NULL");
487 }
488 }
489
490 const char* ObjArrayKlass::internal_name() const {
491 return external_name();
492 }
493
494
495 // Verification
496
497 void ObjArrayKlass::verify_on(outputStream* st) {
498 ArrayKlass::verify_on(st);
499 guarantee(element_klass()->is_klass(), "should be klass");
500 guarantee(bottom_klass()->is_klass(), "should be klass");
501 Klass* bk = bottom_klass();
502 guarantee(bk->is_instance_klass() || bk->is_typeArray_klass(), "invalid bottom klass");
503 }
504
505 void ObjArrayKlass::oop_verify_on(oop obj, outputStream* st) {
506 ArrayKlass::oop_verify_on(obj, st);
507 guarantee(obj->is_objArray(), "must be objArray");
508 objArrayOop oa = objArrayOop(obj);
509 for(int index = 0; index < oa->length(); index++) {
510 guarantee(oopDesc::is_oop_or_null(oa->obj_at(index)), "should be oop");
511 }
512 }
|
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 "classfile/moduleEntry.hpp"
27 #include "classfile/packageEntry.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/vmClasses.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "gc/shared/collectedHeap.inline.hpp"
32 #include "memory/iterator.inline.hpp"
33 #include "memory/metadataFactory.hpp"
34 #include "memory/metaspaceClosure.hpp"
35 #include "memory/oopFactory.hpp"
36 #include "memory/resourceArea.hpp"
37 #include "memory/universe.hpp"
38 #include "oops/arrayKlass.inline.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/klass.inline.hpp"
41 #include "oops/objArrayKlass.inline.hpp"
42 #include "oops/objArrayOop.inline.hpp"
43 #include "oops/oop.inline.hpp"
44 #include "oops/symbol.hpp"
45 #include "runtime/handles.inline.hpp"
46 #include "runtime/mutexLocker.hpp"
47 #include "utilities/macros.hpp"
48
49 ObjArrayKlass* ObjArrayKlass::allocate(ClassLoaderData* loader_data, int n,
50 Klass* k, Symbol* name, bool null_free,
51 TRAPS) {
52 assert(ObjArrayKlass::header_size() <= InstanceKlass::header_size(),
53 "array klasses must be same size as InstanceKlass");
54
55 int size = ArrayKlass::static_size(ObjArrayKlass::header_size());
56
57 return new (loader_data, size, THREAD) ObjArrayKlass(n, k, name, null_free);
58 }
59
60 ObjArrayKlass* ObjArrayKlass::allocate_objArray_klass(ClassLoaderData* loader_data,
61 int n, Klass* element_klass,
62 bool null_free, bool qdesc, TRAPS) {
63 assert(!null_free || (n == 1 && element_klass->is_inline_klass() && qdesc), "null-free unsupported");
64
65 // Eagerly allocate the direct array supertype.
66 Klass* super_klass = NULL;
67 if (!Universe::is_bootstrapping() || vmClasses::Object_klass_loaded()) {
68 Klass* element_super = element_klass->super();
69 if (element_super != NULL) {
70 // The element type has a direct super. E.g., String[] has direct super of Object[].
71 if (null_free) {
72 super_klass = element_klass->array_klass_or_null();
73 } else {
74 super_klass = element_super->array_klass_or_null();
75 }
76 bool supers_exist = super_klass != NULL;
77 // Also, see if the element has secondary supertypes.
78 // We need an array type for each.
79 const Array<Klass*>* element_supers = element_klass->secondary_supers();
80 for( int i = element_supers->length()-1; i >= 0; i-- ) {
81 Klass* elem_super = element_supers->at(i);
82 if (elem_super->array_klass_or_null() == NULL) {
83 supers_exist = false;
84 break;
85 }
86 }
87 if (null_free) {
88 if (element_klass->array_klass_or_null() == NULL) {
89 supers_exist = false;
90 }
91 }
92 if (!supers_exist) {
93 // Oops. Not allocated yet. Back out, allocate it, and retry.
94 Klass* ek = NULL;
95 {
96 MutexUnlocker mu(MultiArray_lock);
97 if (null_free) {
98 element_klass->array_klass(CHECK_NULL);
99 } else {
100 element_super->array_klass(CHECK_NULL);
101 }
102 for( int i = element_supers->length()-1; i >= 0; i-- ) {
103 Klass* elem_super = element_supers->at(i);
104 elem_super->array_klass(CHECK_NULL);
105 }
106 // Now retry from the beginning
107 if (null_free) {
108 ek = InlineKlass::cast(element_klass)->value_array_klass(CHECK_NULL);
109 } else {
110 ek = element_klass->array_klass(n, CHECK_NULL);
111 }
112 } // re-lock
113 return ObjArrayKlass::cast(ek);
114 }
115 } else {
116 // The element type is already Object. Object[] has direct super of Object.
117 super_klass = vmClasses::Object_klass();
118 }
119 }
120
121 // Create type name for klass.
122 Symbol* name = ArrayKlass::create_element_klass_array_name(element_klass, qdesc, CHECK_NULL);
123
124 // Initialize instance variables
125 ObjArrayKlass* oak = ObjArrayKlass::allocate(loader_data, n, element_klass, name, null_free, CHECK_NULL);
126
127 ModuleEntry* module = oak->module();
128 assert(module != NULL, "No module entry for array");
129
130 // Call complete_create_array_klass after all instance variables has been initialized.
131 ArrayKlass::complete_create_array_klass(oak, super_klass, module, CHECK_NULL);
132
133 // Add all classes to our internal class loader list here,
134 // including classes in the bootstrap (NULL) class loader.
135 // Do this step after creating the mirror so that if the
136 // mirror creation fails, loaded_classes_do() doesn't find
137 // an array class without a mirror.
138 loader_data->add_class(oak);
139
140 return oak;
141 }
142
143 ObjArrayKlass::ObjArrayKlass(int n, Klass* element_klass, Symbol* name, bool null_free) : ArrayKlass(name, ID) {
144 set_dimension(n);
145 set_element_klass(element_klass);
146
147 assert(!null_free || name->is_Q_array_signature(), "sanity check");
148
149 Klass* bk;
150 if (element_klass->is_objArray_klass()) {
151 bk = ObjArrayKlass::cast(element_klass)->bottom_klass();
152 } else if (element_klass->is_flatArray_klass()) {
153 bk = FlatArrayKlass::cast(element_klass)->element_klass();
154 } else {
155 bk = element_klass;
156 }
157 assert(bk != NULL && (bk->is_instance_klass() || bk->is_typeArray_klass()), "invalid bottom klass");
158 set_bottom_klass(bk);
159 set_class_loader_data(bk->class_loader_data());
160
161 int lh = array_layout_helper(T_OBJECT);
162 if (null_free) {
163 assert(n == 1, "Bytecode does not support null-free multi-dim");
164 lh = layout_helper_set_null_free(lh);
165 #ifdef _LP64
166 set_prototype_header(markWord::null_free_array_prototype());
167 assert(prototype_header().is_null_free_array(), "sanity");
168 #else
169 set_prototype_header(markWord::inline_type_prototype());
170 #endif
171 }
172 set_layout_helper(lh);
173 assert(is_array_klass(), "sanity");
174 assert(is_objArray_klass(), "sanity");
175 }
176
177 size_t ObjArrayKlass::oop_size(oop obj) const {
178 assert(obj->is_objArray(), "must be object array");
179 return objArrayOop(obj)->object_size();
180 }
181
182 objArrayOop ObjArrayKlass::allocate(int length, TRAPS) {
183 check_array_allocation_length(length, arrayOopDesc::max_array_length(T_OBJECT), CHECK_NULL);
184 size_t size = objArrayOopDesc::object_size(length);
185 bool populate_null_free = is_null_free_array_klass();
186 objArrayOop array = (objArrayOop)Universe::heap()->array_allocate(this, size, length,
187 /* do_zero */ true, CHECK_NULL);
188 objArrayHandle array_h(THREAD, array);
189 if (populate_null_free) {
190 assert(dimension() == 1, "Can only populate the final dimension");
191 assert(element_klass()->is_inline_klass(), "Unexpected");
192 assert(!element_klass()->is_array_klass(), "ArrayKlass unexpected here");
193 assert(!InlineKlass::cast(element_klass())->flatten_array(), "Expected flatArrayOop allocation");
194 element_klass()->initialize(CHECK_NULL);
195 // Populate default values...
196 instanceOop value = (instanceOop) InlineKlass::cast(element_klass())->default_value();
197 for (int i = 0; i < length; i++) {
198 array_h->obj_at_put(i, value);
199 }
200 }
201 return array_h();
202 }
203
204 oop ObjArrayKlass::multi_allocate(int rank, jint* sizes, TRAPS) {
205 int length = *sizes;
206 if (rank == 1) { // last dim may be flatArray, check if we have any special storage requirements
207 if (name()->char_at(1) != JVM_SIGNATURE_ARRAY && name()->is_Q_array_signature()) {
208 return oopFactory::new_valueArray(element_klass(), length, CHECK_NULL);
209 } else {
210 return oopFactory::new_objArray(element_klass(), length, CHECK_NULL);
211 }
212 }
213 guarantee(rank > 1, "Rank below 1");
214 // Call to lower_dimension uses this pointer, so most be called before a
215 // possible GC
216 Klass* ld_klass = lower_dimension();
217 // If length < 0 allocate will throw an exception.
218 objArrayOop array = allocate(length, CHECK_NULL);
219 objArrayHandle h_array (THREAD, array);
220 if (length != 0) {
221 for (int index = 0; index < length; index++) {
222 ArrayKlass* ak = ArrayKlass::cast(ld_klass);
223 oop sub_array = ak->multi_allocate(rank-1, &sizes[1], CHECK_NULL);
224 h_array->obj_at_put(index, sub_array);
225 }
226 } else {
227 // Since this array dimension has zero length, nothing will be
228 // allocated, however the lower dimension values must be checked
229 // for illegal values.
230 for (int i = 0; i < rank - 1; ++i) {
231 sizes += 1;
232 if (*sizes < 0) {
233 THROW_MSG_0(vmSymbols::java_lang_NegativeArraySizeException(), err_msg("%d", *sizes));
234 }
235 }
236 }
237 return h_array();
238 }
239
240 // Either oop or narrowOop depending on UseCompressedOops.
241 void ObjArrayKlass::do_copy(arrayOop s, size_t src_offset,
242 arrayOop d, size_t dst_offset, int length, TRAPS) {
243 if (s == d) {
244 // since source and destination are equal we do not need conversion checks.
245 assert(length > 0, "sanity check");
246 ArrayAccess<>::oop_arraycopy(s, src_offset, d, dst_offset, length);
247 } else {
248 // We have to make sure all elements conform to the destination array
249 Klass* bound = ObjArrayKlass::cast(d->klass())->element_klass();
250 Klass* stype = ObjArrayKlass::cast(s->klass())->element_klass();
251 // Perform null check if dst is null-free but src has no such guarantee
252 bool null_check = ((!s->klass()->is_null_free_array_klass()) &&
253 d->klass()->is_null_free_array_klass());
254 if (stype == bound || stype->is_subtype_of(bound)) {
255 if (null_check) {
256 ArrayAccess<ARRAYCOPY_DISJOINT | ARRAYCOPY_NOTNULL>::oop_arraycopy(s, src_offset, d, dst_offset, length);
257 } else {
258 ArrayAccess<ARRAYCOPY_DISJOINT>::oop_arraycopy(s, src_offset, d, dst_offset, length);
259 }
260 } else {
261 if (null_check) {
262 ArrayAccess<ARRAYCOPY_DISJOINT | ARRAYCOPY_CHECKCAST | ARRAYCOPY_NOTNULL>::oop_arraycopy(s, src_offset, d, dst_offset, length);
263 } else {
264 ArrayAccess<ARRAYCOPY_DISJOINT | ARRAYCOPY_CHECKCAST>::oop_arraycopy(s, src_offset, d, dst_offset, length);
265 }
266 }
267 }
268 }
269
270 void ObjArrayKlass::copy_array(arrayOop s, int src_pos, arrayOop d,
271 int dst_pos, int length, TRAPS) {
272 assert(s->is_objArray(), "must be obj array");
273
274 if (EnableValhalla) {
275 if (d->is_flatArray()) {
276 FlatArrayKlass::cast(d->klass())->copy_array(s, src_pos, d, dst_pos, length, THREAD);
277 return;
278 }
279 }
280
281 if (!d->is_objArray()) {
282 ResourceMark rm(THREAD);
283 stringStream ss;
284 if (d->is_typeArray()) {
285 ss.print("arraycopy: type mismatch: can not copy object array[] into %s[]",
286 type2name_tab[ArrayKlass::cast(d->klass())->element_type()]);
287 } else {
288 ss.print("arraycopy: destination type %s is not an array", d->klass()->external_name());
289 }
290 THROW_MSG(vmSymbols::java_lang_ArrayStoreException(), ss.as_string());
291 }
292
293 // Check is all offsets and lengths are non negative
294 if (src_pos < 0 || dst_pos < 0 || length < 0) {
295 // Pass specific exception reason.
296 ResourceMark rm(THREAD);
297 stringStream ss;
298 if (src_pos < 0) {
299 ss.print("arraycopy: source index %d out of bounds for object array[%d]",
300 src_pos, s->length());
333 size_t src_offset = (size_t) objArrayOopDesc::obj_at_offset<narrowOop>(src_pos);
334 size_t dst_offset = (size_t) objArrayOopDesc::obj_at_offset<narrowOop>(dst_pos);
335 assert(arrayOopDesc::obj_offset_to_raw<narrowOop>(s, src_offset, NULL) ==
336 objArrayOop(s)->obj_at_addr<narrowOop>(src_pos), "sanity");
337 assert(arrayOopDesc::obj_offset_to_raw<narrowOop>(d, dst_offset, NULL) ==
338 objArrayOop(d)->obj_at_addr<narrowOop>(dst_pos), "sanity");
339 do_copy(s, src_offset, d, dst_offset, length, CHECK);
340 } else {
341 size_t src_offset = (size_t) objArrayOopDesc::obj_at_offset<oop>(src_pos);
342 size_t dst_offset = (size_t) objArrayOopDesc::obj_at_offset<oop>(dst_pos);
343 assert(arrayOopDesc::obj_offset_to_raw<oop>(s, src_offset, NULL) ==
344 objArrayOop(s)->obj_at_addr<oop>(src_pos), "sanity");
345 assert(arrayOopDesc::obj_offset_to_raw<oop>(d, dst_offset, NULL) ==
346 objArrayOop(d)->obj_at_addr<oop>(dst_pos), "sanity");
347 do_copy(s, src_offset, d, dst_offset, length, CHECK);
348 }
349 }
350
351
352 Klass* ObjArrayKlass::array_klass(int n, TRAPS) {
353 assert(dimension() <= n, "check order of chain");
354 int dim = dimension();
355 if (dim == n) return this;
356
357 // lock-free read needs acquire semantics
358 if (higher_dimension_acquire() == NULL) {
359
360 ResourceMark rm(THREAD);
361 {
362 // Ensure atomic creation of higher dimensions
363 MutexLocker mu(THREAD, MultiArray_lock);
364
365 // Check if another thread beat us
366 if (higher_dimension() == NULL) {
367
368 // Create multi-dim klass object and link them together
369 Klass* k = ObjArrayKlass::allocate_objArray_klass(class_loader_data(), dim + 1, this,
370 false, this->name()->is_Q_array_signature(), CHECK_NULL);
371 ObjArrayKlass* ak = ObjArrayKlass::cast(k);
372 ak->set_lower_dimension(this);
373 // use 'release' to pair with lock-free load
374 release_set_higher_dimension(ak);
375 assert(ak->is_objArray_klass(), "incorrect initialization of ObjArrayKlass");
376 }
377 }
378 }
379
380 ObjArrayKlass *ak = ObjArrayKlass::cast(higher_dimension());
381 THREAD->check_possible_safepoint();
382 return ak->array_klass(n, THREAD);
383 }
384
385 Klass* ObjArrayKlass::array_klass_or_null(int n) {
386
387 assert(dimension() <= n, "check order of chain");
388 int dim = dimension();
389 if (dim == n) return this;
390
460 return (element_flags & (JVM_ACC_PUBLIC | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED))
461 | (JVM_ACC_ABSTRACT | JVM_ACC_FINAL);
462 }
463
464 ModuleEntry* ObjArrayKlass::module() const {
465 assert(bottom_klass() != NULL, "ObjArrayKlass returned unexpected NULL bottom_klass");
466 // The array is defined in the module of its bottom class
467 return bottom_klass()->module();
468 }
469
470 PackageEntry* ObjArrayKlass::package() const {
471 assert(bottom_klass() != NULL, "ObjArrayKlass returned unexpected NULL bottom_klass");
472 return bottom_klass()->package();
473 }
474
475 // Printing
476
477 void ObjArrayKlass::print_on(outputStream* st) const {
478 #ifndef PRODUCT
479 Klass::print_on(st);
480 st->print(" - element klass: ");
481 element_klass()->print_value_on(st);
482 st->cr();
483 #endif //PRODUCT
484 }
485
486 void ObjArrayKlass::print_value_on(outputStream* st) const {
487 assert(is_klass(), "must be klass");
488
489 element_klass()->print_value_on(st);
490 st->print("[]");
491 }
492
493 #ifndef PRODUCT
494
495 void ObjArrayKlass::oop_print_on(oop obj, outputStream* st) {
496 ArrayKlass::oop_print_on(obj, st);
497 assert(obj->is_objArray(), "must be objArray");
498 objArrayOop oa = objArrayOop(obj);
499 int print_len = MIN2((intx) oa->length(), MaxElementPrintSize);
500 for(int index = 0; index < print_len; index++) {
522 st->print("[%d] ", len);
523 if (obj != NULL) {
524 obj->print_address_on(st);
525 } else {
526 st->print_cr("NULL");
527 }
528 }
529
530 const char* ObjArrayKlass::internal_name() const {
531 return external_name();
532 }
533
534
535 // Verification
536
537 void ObjArrayKlass::verify_on(outputStream* st) {
538 ArrayKlass::verify_on(st);
539 guarantee(element_klass()->is_klass(), "should be klass");
540 guarantee(bottom_klass()->is_klass(), "should be klass");
541 Klass* bk = bottom_klass();
542 guarantee(bk->is_instance_klass() || bk->is_typeArray_klass() || bk->is_flatArray_klass(),
543 "invalid bottom klass");
544 }
545
546 void ObjArrayKlass::oop_verify_on(oop obj, outputStream* st) {
547 ArrayKlass::oop_verify_on(obj, st);
548 guarantee(obj->is_objArray(), "must be objArray");
549 guarantee(obj->is_null_free_array() || (!is_null_free_array_klass()), "null-free klass but not object");
550 objArrayOop oa = objArrayOop(obj);
551 for(int index = 0; index < oa->length(); index++) {
552 guarantee(oopDesc::is_oop_or_null(oa->obj_at(index)), "should be oop");
553 }
554 }
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