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src/share/vm/oops/objArrayKlass.cpp@a8ea2f110d87
src/share/vm/oops/objArrayKlass.cpp
Tue, 26 Aug 2014 09:36:53 +0200
- author
- tschatzl
- date
- Tue, 26 Aug 2014 09:36:53 +0200
- changeset 7091
- a8ea2f110d87
- parent 6982
- 4c1b88a53c74
- child 7535
- 7ae4e26cb1e0
- child 9327
- f96fcd9e1e1b
- permissions
- -rw-r--r--
8054819: Rename HeapRegionSeq to HeapRegionManager
Reviewed-by: jwilhelm, jmasa
1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
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 */
25 #include "precompiled.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "gc_implementation/shared/markSweep.inline.hpp"
30 #include "gc_interface/collectedHeap.inline.hpp"
31 #include "memory/genOopClosures.inline.hpp"
32 #include "memory/iterator.inline.hpp"
33 #include "memory/metadataFactory.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/instanceKlass.hpp"
37 #include "oops/klass.inline.hpp"
38 #include "oops/objArrayKlass.hpp"
39 #include "oops/objArrayKlass.inline.hpp"
40 #include "oops/objArrayOop.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "oops/oop.inline2.hpp"
43 #include "oops/symbol.hpp"
44 #include "runtime/handles.inline.hpp"
45 #include "runtime/mutexLocker.hpp"
46 #include "runtime/orderAccess.inline.hpp"
47 #include "utilities/copy.hpp"
48 #include "utilities/macros.hpp"
49 #if INCLUDE_ALL_GCS
50 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.inline.hpp"
51 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
52 #include "gc_implementation/g1/g1OopClosures.inline.hpp"
53 #include "gc_implementation/g1/g1RemSet.inline.hpp"
54 #include "gc_implementation/g1/heapRegionManager.inline.hpp"
55 #include "gc_implementation/parNew/parOopClosures.inline.hpp"
56 #include "gc_implementation/parallelScavenge/psCompactionManager.hpp"
57 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp"
58 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
59 #include "oops/oop.pcgc.inline.hpp"
60 #endif // INCLUDE_ALL_GCS
62 ObjArrayKlass* ObjArrayKlass::allocate(ClassLoaderData* loader_data, int n, KlassHandle klass_handle, Symbol* name, TRAPS) {
63 assert(ObjArrayKlass::header_size() <= InstanceKlass::header_size(),
64 "array klasses must be same size as InstanceKlass");
66 int size = ArrayKlass::static_size(ObjArrayKlass::header_size());
68 return new (loader_data, size, THREAD) ObjArrayKlass(n, klass_handle, name);
69 }
71 Klass* ObjArrayKlass::allocate_objArray_klass(ClassLoaderData* loader_data,
72 int n, KlassHandle element_klass, TRAPS) {
74 // Eagerly allocate the direct array supertype.
75 KlassHandle super_klass = KlassHandle();
76 if (!Universe::is_bootstrapping() || SystemDictionary::Object_klass_loaded()) {
77 KlassHandle element_super (THREAD, element_klass->super());
78 if (element_super.not_null()) {
79 // The element type has a direct super. E.g., String[] has direct super of Object[].
80 super_klass = KlassHandle(THREAD, element_super->array_klass_or_null());
81 bool supers_exist = super_klass.not_null();
82 // Also, see if the element has secondary supertypes.
83 // We need an array type for each.
84 Array<Klass*>* element_supers = element_klass->secondary_supers();
85 for( int i = element_supers->length()-1; i >= 0; i-- ) {
86 Klass* elem_super = element_supers->at(i);
87 if (elem_super->array_klass_or_null() == NULL) {
88 supers_exist = false;
89 break;
90 }
91 }
92 if (!supers_exist) {
93 // Oops. Not allocated yet. Back out, allocate it, and retry.
94 KlassHandle ek;
95 {
96 MutexUnlocker mu(MultiArray_lock);
97 MutexUnlocker mc(Compile_lock); // for vtables
98 Klass* sk = element_super->array_klass(CHECK_0);
99 super_klass = KlassHandle(THREAD, sk);
100 for( int i = element_supers->length()-1; i >= 0; i-- ) {
101 KlassHandle elem_super (THREAD, element_supers->at(i));
102 elem_super->array_klass(CHECK_0);
103 }
104 // Now retry from the beginning
105 Klass* klass_oop = element_klass->array_klass(n, CHECK_0);
106 // Create a handle because the enclosing brace, when locking
107 // can cause a gc. Better to have this function return a Handle.
108 ek = KlassHandle(THREAD, klass_oop);
109 } // re-lock
110 return ek();
111 }
112 } else {
113 // The element type is already Object. Object[] has direct super of Object.
114 super_klass = KlassHandle(THREAD, SystemDictionary::Object_klass());
115 }
116 }
118 // Create type name for klass.
119 Symbol* name = NULL;
120 if (!element_klass->oop_is_instance() ||
121 (name = InstanceKlass::cast(element_klass())->array_name()) == NULL) {
123 ResourceMark rm(THREAD);
124 char *name_str = element_klass->name()->as_C_string();
125 int len = element_klass->name()->utf8_length();
126 char *new_str = NEW_RESOURCE_ARRAY(char, len + 4);
127 int idx = 0;
128 new_str[idx++] = '[';
129 if (element_klass->oop_is_instance()) { // it could be an array or simple type
130 new_str[idx++] = 'L';
131 }
132 memcpy(&new_str[idx], name_str, len * sizeof(char));
133 idx += len;
134 if (element_klass->oop_is_instance()) {
135 new_str[idx++] = ';';
136 }
137 new_str[idx++] = '\0';
138 name = SymbolTable::new_permanent_symbol(new_str, CHECK_0);
139 if (element_klass->oop_is_instance()) {
140 InstanceKlass* ik = InstanceKlass::cast(element_klass());
141 ik->set_array_name(name);
142 }
143 }
145 // Initialize instance variables
146 ObjArrayKlass* oak = ObjArrayKlass::allocate(loader_data, n, element_klass, name, CHECK_0);
148 // Add all classes to our internal class loader list here,
149 // including classes in the bootstrap (NULL) class loader.
150 // GC walks these as strong roots.
151 loader_data->add_class(oak);
153 // Call complete_create_array_klass after all instance variables has been initialized.
154 ArrayKlass::complete_create_array_klass(oak, super_klass, CHECK_0);
156 return oak;
157 }
159 ObjArrayKlass::ObjArrayKlass(int n, KlassHandle element_klass, Symbol* name) : ArrayKlass(name) {
160 this->set_dimension(n);
161 this->set_element_klass(element_klass());
162 // decrement refcount because object arrays are not explicitly freed. The
163 // InstanceKlass array_name() keeps the name counted while the klass is
164 // loaded.
165 name->decrement_refcount();
167 Klass* bk;
168 if (element_klass->oop_is_objArray()) {
169 bk = ObjArrayKlass::cast(element_klass())->bottom_klass();
170 } else {
171 bk = element_klass();
172 }
173 assert(bk != NULL && (bk->oop_is_instance() || bk->oop_is_typeArray()), "invalid bottom klass");
174 this->set_bottom_klass(bk);
175 this->set_class_loader_data(bk->class_loader_data());
177 this->set_layout_helper(array_layout_helper(T_OBJECT));
178 assert(this->oop_is_array(), "sanity");
179 assert(this->oop_is_objArray(), "sanity");
180 }
182 int ObjArrayKlass::oop_size(oop obj) const {
183 assert(obj->is_objArray(), "must be object array");
184 return objArrayOop(obj)->object_size();
185 }
187 objArrayOop ObjArrayKlass::allocate(int length, TRAPS) {
188 if (length >= 0) {
189 if (length <= arrayOopDesc::max_array_length(T_OBJECT)) {
190 int size = objArrayOopDesc::object_size(length);
191 KlassHandle h_k(THREAD, this);
192 return (objArrayOop)CollectedHeap::array_allocate(h_k, size, length, CHECK_NULL);
193 } else {
194 report_java_out_of_memory("Requested array size exceeds VM limit");
195 JvmtiExport::post_array_size_exhausted();
196 THROW_OOP_0(Universe::out_of_memory_error_array_size());
197 }
198 } else {
199 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
200 }
201 }
203 static int multi_alloc_counter = 0;
205 oop ObjArrayKlass::multi_allocate(int rank, jint* sizes, TRAPS) {
206 int length = *sizes;
207 // Call to lower_dimension uses this pointer, so most be called before a
208 // possible GC
209 KlassHandle h_lower_dimension(THREAD, lower_dimension());
210 // If length < 0 allocate will throw an exception.
211 objArrayOop array = allocate(length, CHECK_NULL);
212 objArrayHandle h_array (THREAD, array);
213 if (rank > 1) {
214 if (length != 0) {
215 for (int index = 0; index < length; index++) {
216 ArrayKlass* ak = ArrayKlass::cast(h_lower_dimension());
217 oop sub_array = ak->multi_allocate(rank-1, &sizes[1], CHECK_NULL);
218 h_array->obj_at_put(index, sub_array);
219 }
220 } else {
221 // Since this array dimension has zero length, nothing will be
222 // allocated, however the lower dimension values must be checked
223 // for illegal values.
224 for (int i = 0; i < rank - 1; ++i) {
225 sizes += 1;
226 if (*sizes < 0) {
227 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
228 }
229 }
230 }
231 }
232 return h_array();
233 }
235 // Either oop or narrowOop depending on UseCompressedOops.
236 template <class T> void ObjArrayKlass::do_copy(arrayOop s, T* src,
237 arrayOop d, T* dst, int length, TRAPS) {
239 BarrierSet* bs = Universe::heap()->barrier_set();
240 // For performance reasons, we assume we are that the write barrier we
241 // are using has optimized modes for arrays of references. At least one
242 // of the asserts below will fail if this is not the case.
243 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
244 assert(bs->has_write_ref_array_pre_opt(), "For pre-barrier as well.");
246 if (s == d) {
247 // since source and destination are equal we do not need conversion checks.
248 assert(length > 0, "sanity check");
249 bs->write_ref_array_pre(dst, length);
250 Copy::conjoint_oops_atomic(src, dst, length);
251 } else {
252 // We have to make sure all elements conform to the destination array
253 Klass* bound = ObjArrayKlass::cast(d->klass())->element_klass();
254 Klass* stype = ObjArrayKlass::cast(s->klass())->element_klass();
255 if (stype == bound || stype->is_subtype_of(bound)) {
256 // elements are guaranteed to be subtypes, so no check necessary
257 bs->write_ref_array_pre(dst, length);
258 Copy::conjoint_oops_atomic(src, dst, length);
259 } else {
260 // slow case: need individual subtype checks
261 // note: don't use obj_at_put below because it includes a redundant store check
262 T* from = src;
263 T* end = from + length;
264 for (T* p = dst; from < end; from++, p++) {
265 // XXX this is going to be slow.
266 T element = *from;
267 // even slower now
268 bool element_is_null = oopDesc::is_null(element);
269 oop new_val = element_is_null ? oop(NULL)
270 : oopDesc::decode_heap_oop_not_null(element);
271 if (element_is_null ||
272 (new_val->klass())->is_subtype_of(bound)) {
273 bs->write_ref_field_pre(p, new_val);
274 *p = element;
275 } else {
276 // We must do a barrier to cover the partial copy.
277 const size_t pd = pointer_delta(p, dst, (size_t)heapOopSize);
278 // pointer delta is scaled to number of elements (length field in
279 // objArrayOop) which we assume is 32 bit.
280 assert(pd == (size_t)(int)pd, "length field overflow");
281 bs->write_ref_array((HeapWord*)dst, pd);
282 THROW(vmSymbols::java_lang_ArrayStoreException());
283 return;
284 }
285 }
286 }
287 }
288 bs->write_ref_array((HeapWord*)dst, length);
289 }
291 void ObjArrayKlass::copy_array(arrayOop s, int src_pos, arrayOop d,
292 int dst_pos, int length, TRAPS) {
293 assert(s->is_objArray(), "must be obj array");
295 if (!d->is_objArray()) {
296 THROW(vmSymbols::java_lang_ArrayStoreException());
297 }
299 // Check is all offsets and lengths are non negative
300 if (src_pos < 0 || dst_pos < 0 || length < 0) {
301 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
302 }
303 // Check if the ranges are valid
304 if ( (((unsigned int) length + (unsigned int) src_pos) > (unsigned int) s->length())
305 || (((unsigned int) length + (unsigned int) dst_pos) > (unsigned int) d->length()) ) {
306 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
307 }
309 // Special case. Boundary cases must be checked first
310 // This allows the following call: copy_array(s, s.length(), d.length(), 0).
311 // This is correct, since the position is supposed to be an 'in between point', i.e., s.length(),
312 // points to the right of the last element.
313 if (length==0) {
314 return;
315 }
316 if (UseCompressedOops) {
317 narrowOop* const src = objArrayOop(s)->obj_at_addr<narrowOop>(src_pos);
318 narrowOop* const dst = objArrayOop(d)->obj_at_addr<narrowOop>(dst_pos);
319 do_copy<narrowOop>(s, src, d, dst, length, CHECK);
320 } else {
321 oop* const src = objArrayOop(s)->obj_at_addr<oop>(src_pos);
322 oop* const dst = objArrayOop(d)->obj_at_addr<oop>(dst_pos);
323 do_copy<oop> (s, src, d, dst, length, CHECK);
324 }
325 }
328 Klass* ObjArrayKlass::array_klass_impl(bool or_null, int n, TRAPS) {
330 assert(dimension() <= n, "check order of chain");
331 int dim = dimension();
332 if (dim == n) return this;
334 if (higher_dimension() == NULL) {
335 if (or_null) return NULL;
337 ResourceMark rm;
338 JavaThread *jt = (JavaThread *)THREAD;
339 {
340 MutexLocker mc(Compile_lock, THREAD); // for vtables
341 // Ensure atomic creation of higher dimensions
342 MutexLocker mu(MultiArray_lock, THREAD);
344 // Check if another thread beat us
345 if (higher_dimension() == NULL) {
347 // Create multi-dim klass object and link them together
348 Klass* k =
349 ObjArrayKlass::allocate_objArray_klass(class_loader_data(), dim + 1, this, CHECK_NULL);
350 ObjArrayKlass* ak = ObjArrayKlass::cast(k);
351 ak->set_lower_dimension(this);
352 OrderAccess::storestore();
353 set_higher_dimension(ak);
354 assert(ak->oop_is_objArray(), "incorrect initialization of ObjArrayKlass");
355 }
356 }
357 } else {
358 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
359 }
361 ObjArrayKlass *ak = ObjArrayKlass::cast(higher_dimension());
362 if (or_null) {
363 return ak->array_klass_or_null(n);
364 }
365 return ak->array_klass(n, CHECK_NULL);
366 }
368 Klass* ObjArrayKlass::array_klass_impl(bool or_null, TRAPS) {
369 return array_klass_impl(or_null, dimension() + 1, CHECK_NULL);
370 }
372 bool ObjArrayKlass::can_be_primary_super_slow() const {
373 if (!bottom_klass()->can_be_primary_super())
374 // array of interfaces
375 return false;
376 else
377 return Klass::can_be_primary_super_slow();
378 }
380 GrowableArray<Klass*>* ObjArrayKlass::compute_secondary_supers(int num_extra_slots) {
381 // interfaces = { cloneable_klass, serializable_klass, elemSuper[], ... };
382 Array<Klass*>* elem_supers = element_klass()->secondary_supers();
383 int num_elem_supers = elem_supers == NULL ? 0 : elem_supers->length();
384 int num_secondaries = num_extra_slots + 2 + num_elem_supers;
385 if (num_secondaries == 2) {
386 // Must share this for correct bootstrapping!
387 set_secondary_supers(Universe::the_array_interfaces_array());
388 return NULL;
389 } else {
390 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(num_elem_supers+2);
391 secondaries->push(SystemDictionary::Cloneable_klass());
392 secondaries->push(SystemDictionary::Serializable_klass());
393 for (int i = 0; i < num_elem_supers; i++) {
394 Klass* elem_super = (Klass*) elem_supers->at(i);
395 Klass* array_super = elem_super->array_klass_or_null();
396 assert(array_super != NULL, "must already have been created");
397 secondaries->push(array_super);
398 }
399 return secondaries;
400 }
401 }
403 bool ObjArrayKlass::compute_is_subtype_of(Klass* k) {
404 if (!k->oop_is_objArray())
405 return ArrayKlass::compute_is_subtype_of(k);
407 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
408 return element_klass()->is_subtype_of(oak->element_klass());
409 }
411 void ObjArrayKlass::initialize(TRAPS) {
412 bottom_klass()->initialize(THREAD); // dispatches to either InstanceKlass or TypeArrayKlass
413 }
415 #define ObjArrayKlass_SPECIALIZED_OOP_ITERATE(T, a, p, do_oop) \
416 { \
417 T* p = (T*)(a)->base(); \
418 T* const end = p + (a)->length(); \
419 while (p < end) { \
420 do_oop; \
421 p++; \
422 } \
423 }
425 #define ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(T, a, p, low, high, do_oop) \
426 { \
427 T* const l = (T*)(low); \
428 T* const h = (T*)(high); \
429 T* p = (T*)(a)->base(); \
430 T* end = p + (a)->length(); \
431 if (p < l) p = l; \
432 if (end > h) end = h; \
433 while (p < end) { \
434 do_oop; \
435 ++p; \
436 } \
437 }
439 #define ObjArrayKlass_OOP_ITERATE(a, p, do_oop) \
440 if (UseCompressedOops) { \
441 ObjArrayKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \
442 a, p, do_oop) \
443 } else { \
444 ObjArrayKlass_SPECIALIZED_OOP_ITERATE(oop, \
445 a, p, do_oop) \
446 }
448 #define ObjArrayKlass_BOUNDED_OOP_ITERATE(a, p, low, high, do_oop) \
449 if (UseCompressedOops) { \
450 ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \
451 a, p, low, high, do_oop) \
452 } else { \
453 ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \
454 a, p, low, high, do_oop) \
455 }
457 void ObjArrayKlass::oop_follow_contents(oop obj) {
458 assert (obj->is_array(), "obj must be array");
459 MarkSweep::follow_klass(obj->klass());
460 if (UseCompressedOops) {
461 objarray_follow_contents<narrowOop>(obj, 0);
462 } else {
463 objarray_follow_contents<oop>(obj, 0);
464 }
465 }
467 #if INCLUDE_ALL_GCS
468 void ObjArrayKlass::oop_follow_contents(ParCompactionManager* cm,
469 oop obj) {
470 assert(obj->is_array(), "obj must be array");
471 PSParallelCompact::follow_klass(cm, obj->klass());
472 if (UseCompressedOops) {
473 objarray_follow_contents<narrowOop>(cm, obj, 0);
474 } else {
475 objarray_follow_contents<oop>(cm, obj, 0);
476 }
477 }
478 #endif // INCLUDE_ALL_GCS
480 #define ObjArrayKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \
481 \
482 int ObjArrayKlass::oop_oop_iterate##nv_suffix(oop obj, \
483 OopClosureType* closure) { \
484 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::oa); \
485 assert (obj->is_array(), "obj must be array"); \
486 objArrayOop a = objArrayOop(obj); \
487 /* Get size before changing pointers. */ \
488 /* Don't call size() or oop_size() since that is a virtual call. */ \
489 int size = a->object_size(); \
490 if_do_metadata_checked(closure, nv_suffix) { \
491 closure->do_klass##nv_suffix(obj->klass()); \
492 } \
493 ObjArrayKlass_OOP_ITERATE(a, p, (closure)->do_oop##nv_suffix(p)) \
494 return size; \
495 }
497 #define ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \
498 \
499 int ObjArrayKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \
500 OopClosureType* closure, \
501 MemRegion mr) { \
502 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::oa); \
503 assert(obj->is_array(), "obj must be array"); \
504 objArrayOop a = objArrayOop(obj); \
505 /* Get size before changing pointers. */ \
506 /* Don't call size() or oop_size() since that is a virtual call */ \
507 int size = a->object_size(); \
508 if_do_metadata_checked(closure, nv_suffix) { \
509 /* SSS: Do we need to pass down mr here? */ \
510 closure->do_klass##nv_suffix(a->klass()); \
511 } \
512 ObjArrayKlass_BOUNDED_OOP_ITERATE( \
513 a, p, mr.start(), mr.end(), (closure)->do_oop##nv_suffix(p)) \
514 return size; \
515 }
517 // Like oop_oop_iterate but only iterates over a specified range and only used
518 // for objArrayOops.
519 #define ObjArrayKlass_OOP_OOP_ITERATE_DEFN_r(OopClosureType, nv_suffix) \
520 \
521 int ObjArrayKlass::oop_oop_iterate_range##nv_suffix(oop obj, \
522 OopClosureType* closure, \
523 int start, int end) { \
524 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::oa); \
525 assert(obj->is_array(), "obj must be array"); \
526 objArrayOop a = objArrayOop(obj); \
527 /* Get size before changing pointers. */ \
528 /* Don't call size() or oop_size() since that is a virtual call */ \
529 int size = a->object_size(); \
530 if (UseCompressedOops) { \
531 HeapWord* low = start == 0 ? (HeapWord*)a : (HeapWord*)a->obj_at_addr<narrowOop>(start);\
532 /* this might be wierd if end needs to be aligned on HeapWord boundary */ \
533 HeapWord* high = (HeapWord*)((narrowOop*)a->base() + end); \
534 MemRegion mr(low, high); \
535 if_do_metadata_checked(closure, nv_suffix) { \
536 /* SSS: Do we need to pass down mr here? */ \
537 closure->do_klass##nv_suffix(a->klass()); \
538 } \
539 ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \
540 a, p, low, high, (closure)->do_oop##nv_suffix(p)) \
541 } else { \
542 HeapWord* low = start == 0 ? (HeapWord*)a : (HeapWord*)a->obj_at_addr<oop>(start); \
543 HeapWord* high = (HeapWord*)((oop*)a->base() + end); \
544 MemRegion mr(low, high); \
545 if_do_metadata_checked(closure, nv_suffix) { \
546 /* SSS: Do we need to pass down mr here? */ \
547 closure->do_klass##nv_suffix(a->klass()); \
548 } \
549 ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \
550 a, p, low, high, (closure)->do_oop##nv_suffix(p)) \
551 } \
552 return size; \
553 }
555 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DEFN)
556 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DEFN)
557 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m)
558 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m)
559 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_r)
560 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_r)
562 int ObjArrayKlass::oop_adjust_pointers(oop obj) {
563 assert(obj->is_objArray(), "obj must be obj array");
564 objArrayOop a = objArrayOop(obj);
565 // Get size before changing pointers.
566 // Don't call size() or oop_size() since that is a virtual call.
567 int size = a->object_size();
568 ObjArrayKlass_OOP_ITERATE(a, p, MarkSweep::adjust_pointer(p))
569 return size;
570 }
572 #if INCLUDE_ALL_GCS
573 void ObjArrayKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
574 assert(obj->is_objArray(), "obj must be obj array");
575 ObjArrayKlass_OOP_ITERATE( \
576 objArrayOop(obj), p, \
577 if (PSScavenge::should_scavenge(p)) { \
578 pm->claim_or_forward_depth(p); \
579 })
580 }
582 int ObjArrayKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
583 assert (obj->is_objArray(), "obj must be obj array");
584 objArrayOop a = objArrayOop(obj);
585 int size = a->object_size();
586 ObjArrayKlass_OOP_ITERATE(a, p, PSParallelCompact::adjust_pointer(p))
587 return size;
588 }
589 #endif // INCLUDE_ALL_GCS
591 // JVM support
593 jint ObjArrayKlass::compute_modifier_flags(TRAPS) const {
594 // The modifier for an objectArray is the same as its element
595 if (element_klass() == NULL) {
596 assert(Universe::is_bootstrapping(), "partial objArray only at startup");
597 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
598 }
599 // Return the flags of the bottom element type.
600 jint element_flags = bottom_klass()->compute_modifier_flags(CHECK_0);
602 return (element_flags & (JVM_ACC_PUBLIC | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED))
603 | (JVM_ACC_ABSTRACT | JVM_ACC_FINAL);
604 }
607 // Printing
609 void ObjArrayKlass::print_on(outputStream* st) const {
610 #ifndef PRODUCT
611 Klass::print_on(st);
612 st->print(" - instance klass: ");
613 element_klass()->print_value_on(st);
614 st->cr();
615 #endif //PRODUCT
616 }
618 void ObjArrayKlass::print_value_on(outputStream* st) const {
619 assert(is_klass(), "must be klass");
621 element_klass()->print_value_on(st);
622 st->print("[]");
623 }
625 #ifndef PRODUCT
627 void ObjArrayKlass::oop_print_on(oop obj, outputStream* st) {
628 ArrayKlass::oop_print_on(obj, st);
629 assert(obj->is_objArray(), "must be objArray");
630 objArrayOop oa = objArrayOop(obj);
631 int print_len = MIN2((intx) oa->length(), MaxElementPrintSize);
632 for(int index = 0; index < print_len; index++) {
633 st->print(" - %3d : ", index);
634 oa->obj_at(index)->print_value_on(st);
635 st->cr();
636 }
637 int remaining = oa->length() - print_len;
638 if (remaining > 0) {
639 st->print_cr(" - <%d more elements, increase MaxElementPrintSize to print>", remaining);
640 }
641 }
643 #endif //PRODUCT
645 static int max_objArray_print_length = 4;
647 void ObjArrayKlass::oop_print_value_on(oop obj, outputStream* st) {
648 assert(obj->is_objArray(), "must be objArray");
649 st->print("a ");
650 element_klass()->print_value_on(st);
651 int len = objArrayOop(obj)->length();
652 st->print("[%d] ", len);
653 obj->print_address_on(st);
654 if (NOT_PRODUCT(PrintOopAddress ||) PrintMiscellaneous && (WizardMode || Verbose)) {
655 st->print("{");
656 for (int i = 0; i < len; i++) {
657 if (i > max_objArray_print_length) {
658 st->print("..."); break;
659 }
660 st->print(" "INTPTR_FORMAT, (intptr_t)(void*)objArrayOop(obj)->obj_at(i));
661 }
662 st->print(" }");
663 }
664 }
666 const char* ObjArrayKlass::internal_name() const {
667 return external_name();
668 }
671 // Verification
673 void ObjArrayKlass::verify_on(outputStream* st) {
674 ArrayKlass::verify_on(st);
675 guarantee(element_klass()->is_klass(), "should be klass");
676 guarantee(bottom_klass()->is_klass(), "should be klass");
677 Klass* bk = bottom_klass();
678 guarantee(bk->oop_is_instance() || bk->oop_is_typeArray(), "invalid bottom klass");
679 }
681 void ObjArrayKlass::oop_verify_on(oop obj, outputStream* st) {
682 ArrayKlass::oop_verify_on(obj, st);
683 guarantee(obj->is_objArray(), "must be objArray");
684 objArrayOop oa = objArrayOop(obj);
685 for(int index = 0; index < oa->length(); index++) {
686 guarantee(oa->obj_at(index)->is_oop_or_null(), "should be oop");
687 }
688 }
