1 /* 2 * Copyright (c) 1997, 2015, 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 */ 24 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/specialized_oop_closures.hpp" 36 #include "memory/universe.inline.hpp" 37 #include "oops/instanceKlass.hpp" 38 #include "oops/klass.inline.hpp" 39 #include "oops/objArrayKlass.inline.hpp" 40 #include "oops/objArrayOop.inline.hpp" 41 #include "oops/oop.inline.hpp" 42 #include "oops/symbol.hpp" 43 #include "runtime/handles.inline.hpp" 44 #include "runtime/mutexLocker.hpp" 45 #include "runtime/orderAccess.inline.hpp" 46 #include "utilities/copy.hpp" 47 #include "utilities/macros.hpp" 48 #if INCLUDE_ALL_GCS 49 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.inline.hpp" 50 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" 51 #include "gc_implementation/g1/g1OopClosures.inline.hpp" 52 #include "gc_implementation/g1/g1RemSet.inline.hpp" 53 #include "gc_implementation/g1/heapRegionManager.inline.hpp" 54 #include "gc_implementation/parNew/parOopClosures.inline.hpp" 55 #include "gc_implementation/parallelScavenge/psCompactionManager.hpp" 56 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" 57 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" 58 #include "oops/oop.pcgc.inline.hpp" 59 #endif // INCLUDE_ALL_GCS 60 61 ObjArrayKlass* ObjArrayKlass::allocate(ClassLoaderData* loader_data, int n, KlassHandle klass_handle, Symbol* name, TRAPS) { 62 assert(ObjArrayKlass::header_size() <= InstanceKlass::header_size(), 63 "array klasses must be same size as InstanceKlass"); 64 65 int size = ArrayKlass::static_size(ObjArrayKlass::header_size()); 66 67 return new (loader_data, size, THREAD) ObjArrayKlass(n, klass_handle, name); 68 } 69 70 Klass* ObjArrayKlass::allocate_objArray_klass(ClassLoaderData* loader_data, 71 int n, KlassHandle element_klass, TRAPS) { 72 73 // Eagerly allocate the direct array supertype. 74 KlassHandle super_klass = KlassHandle(); 75 if (!Universe::is_bootstrapping() || SystemDictionary::Object_klass_loaded()) { 76 KlassHandle element_super (THREAD, element_klass->super()); 77 if (element_super.not_null()) { 78 // The element type has a direct super. E.g., String[] has direct super of Object[]. 79 super_klass = KlassHandle(THREAD, element_super->array_klass_or_null()); 80 bool supers_exist = super_klass.not_null(); 81 // Also, see if the element has secondary supertypes. 82 // We need an array type for each. 83 Array<Klass*>* element_supers = element_klass->secondary_supers(); 84 for( int i = element_supers->length()-1; i >= 0; i-- ) { 85 Klass* elem_super = element_supers->at(i); 86 if (elem_super->array_klass_or_null() == NULL) { 87 supers_exist = false; 88 break; 89 } 90 } 91 if (!supers_exist) { 92 // Oops. Not allocated yet. Back out, allocate it, and retry. 93 KlassHandle ek; 94 { 95 MutexUnlocker mu(MultiArray_lock); 96 MutexUnlocker mc(Compile_lock); // for vtables 97 Klass* sk = element_super->array_klass(CHECK_0); 98 super_klass = KlassHandle(THREAD, sk); 99 for( int i = element_supers->length()-1; i >= 0; i-- ) { 100 KlassHandle elem_super (THREAD, element_supers->at(i)); 101 elem_super->array_klass(CHECK_0); 102 } 103 // Now retry from the beginning 104 Klass* klass_oop = element_klass->array_klass(n, CHECK_0); 105 // Create a handle because the enclosing brace, when locking 106 // can cause a gc. Better to have this function return a Handle. 107 ek = KlassHandle(THREAD, klass_oop); 108 } // re-lock 109 return ek(); 110 } 111 } else { 112 // The element type is already Object. Object[] has direct super of Object. 113 super_klass = KlassHandle(THREAD, SystemDictionary::Object_klass()); 114 } 115 } 116 117 // Create type name for klass. 118 Symbol* name = NULL; 119 if (!element_klass->oop_is_instance() || 120 (name = InstanceKlass::cast(element_klass())->array_name()) == NULL) { 121 122 ResourceMark rm(THREAD); 123 char *name_str = element_klass->name()->as_C_string(); 124 int len = element_klass->name()->utf8_length(); 125 char *new_str = NEW_RESOURCE_ARRAY(char, len + 4); 126 int idx = 0; 127 new_str[idx++] = '['; 128 if (element_klass->oop_is_instance()) { // it could be an array or simple type 129 new_str[idx++] = 'L'; 130 } 131 memcpy(&new_str[idx], name_str, len * sizeof(char)); 132 idx += len; 133 if (element_klass->oop_is_instance()) { 134 new_str[idx++] = ';'; 135 } 136 new_str[idx++] = '\0'; 137 name = SymbolTable::new_permanent_symbol(new_str, CHECK_0); 138 if (element_klass->oop_is_instance()) { 139 InstanceKlass* ik = InstanceKlass::cast(element_klass()); 140 ik->set_array_name(name); 141 } 142 } 143 144 // Initialize instance variables 145 ObjArrayKlass* oak = ObjArrayKlass::allocate(loader_data, n, element_klass, name, CHECK_0); 146 147 // Add all classes to our internal class loader list here, 148 // including classes in the bootstrap (NULL) class loader. 149 // GC walks these as strong roots. 150 loader_data->add_class(oak); 151 152 // Call complete_create_array_klass after all instance variables has been initialized. 153 ArrayKlass::complete_create_array_klass(oak, super_klass, CHECK_0); 154 155 return oak; 156 } 157 158 ObjArrayKlass::ObjArrayKlass(int n, KlassHandle element_klass, Symbol* name) : ArrayKlass(name) { 159 this->set_dimension(n); 160 this->set_element_klass(element_klass()); 161 // decrement refcount because object arrays are not explicitly freed. The 162 // InstanceKlass array_name() keeps the name counted while the klass is 163 // loaded. 164 name->decrement_refcount(); 165 166 Klass* bk; 167 if (element_klass->oop_is_objArray()) { 168 bk = ObjArrayKlass::cast(element_klass())->bottom_klass(); 169 } else { 170 bk = element_klass(); 171 } 172 assert(bk != NULL && (bk->oop_is_instance() || bk->oop_is_typeArray()), "invalid bottom klass"); 173 this->set_bottom_klass(bk); 174 this->set_class_loader_data(bk->class_loader_data()); 175 176 this->set_layout_helper(array_layout_helper(T_OBJECT)); 177 assert(this->oop_is_array(), "sanity"); 178 assert(this->oop_is_objArray(), "sanity"); 179 } 180 181 int ObjArrayKlass::oop_size(oop obj) const { 182 assert(obj->is_objArray(), "must be object array"); 183 return objArrayOop(obj)->object_size(); 184 } 185 186 objArrayOop ObjArrayKlass::allocate(int length, TRAPS) { 187 if (length >= 0) { 188 if (length <= arrayOopDesc::max_array_length(T_OBJECT)) { 189 int size = objArrayOopDesc::object_size(length); 190 KlassHandle h_k(THREAD, this); 191 return (objArrayOop)CollectedHeap::array_allocate(h_k, size, length, THREAD); 192 } else { 193 report_java_out_of_memory("Requested array size exceeds VM limit"); 194 JvmtiExport::post_array_size_exhausted(); 195 THROW_OOP_0(Universe::out_of_memory_error_array_size()); 196 } 197 } else { 198 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 199 } 200 } 201 202 static int multi_alloc_counter = 0; 203 204 oop ObjArrayKlass::multi_allocate(int rank, jint* sizes, TRAPS) { 205 int length = *sizes; 206 // Call to lower_dimension uses this pointer, so most be called before a 207 // possible GC 208 KlassHandle h_lower_dimension(THREAD, lower_dimension()); 209 // If length < 0 allocate will throw an exception. 210 objArrayOop array = allocate(length, CHECK_NULL); 211 objArrayHandle h_array (THREAD, array); 212 if (rank > 1) { 213 if (length != 0) { 214 for (int index = 0; index < length; index++) { 215 ArrayKlass* ak = ArrayKlass::cast(h_lower_dimension()); 216 oop sub_array = ak->multi_allocate(rank-1, &sizes[1], CHECK_NULL); 217 h_array->obj_at_put(index, sub_array); 218 } 219 } else { 220 // Since this array dimension has zero length, nothing will be 221 // allocated, however the lower dimension values must be checked 222 // for illegal values. 223 for (int i = 0; i < rank - 1; ++i) { 224 sizes += 1; 225 if (*sizes < 0) { 226 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); 227 } 228 } 229 } 230 } 231 return h_array(); 232 } 233 234 // Either oop or narrowOop depending on UseCompressedOops. 235 template <class T> void ObjArrayKlass::do_copy(arrayOop s, T* src, 236 arrayOop d, T* dst, int length, TRAPS) { 237 238 BarrierSet* bs = Universe::heap()->barrier_set(); 239 // For performance reasons, we assume we are that the write barrier we 240 // are using has optimized modes for arrays of references. At least one 241 // of the asserts below will fail if this is not the case. 242 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); 243 assert(bs->has_write_ref_array_pre_opt(), "For pre-barrier as well."); 244 245 if (s == d) { 246 // since source and destination are equal we do not need conversion checks. 247 assert(length > 0, "sanity check"); 248 bs->write_ref_array_pre(dst, length); 249 Copy::conjoint_oops_atomic(src, dst, length); 250 } else { 251 // We have to make sure all elements conform to the destination array 252 Klass* bound = ObjArrayKlass::cast(d->klass())->element_klass(); 253 Klass* stype = ObjArrayKlass::cast(s->klass())->element_klass(); 254 if (stype == bound || stype->is_subtype_of(bound)) { 255 // elements are guaranteed to be subtypes, so no check necessary 256 bs->write_ref_array_pre(dst, length); 257 Copy::conjoint_oops_atomic(src, dst, length); 258 } else { 259 // slow case: need individual subtype checks 260 // note: don't use obj_at_put below because it includes a redundant store check 261 T* from = src; 262 T* end = from + length; 263 for (T* p = dst; from < end; from++, p++) { 264 // XXX this is going to be slow. 265 T element = *from; 266 // even slower now 267 bool element_is_null = oopDesc::is_null(element); 268 oop new_val = element_is_null ? oop(NULL) 269 : oopDesc::decode_heap_oop_not_null(element); 270 if (element_is_null || 271 (new_val->klass())->is_subtype_of(bound)) { 272 bs->write_ref_field_pre(p, new_val); 273 *p = element; 274 } else { 275 // We must do a barrier to cover the partial copy. 276 const size_t pd = pointer_delta(p, dst, (size_t)heapOopSize); 277 // pointer delta is scaled to number of elements (length field in 278 // objArrayOop) which we assume is 32 bit. 279 assert(pd == (size_t)(int)pd, "length field overflow"); 280 bs->write_ref_array((HeapWord*)dst, pd); 281 THROW(vmSymbols::java_lang_ArrayStoreException()); 282 return; 283 } 284 } 285 } 286 } 287 bs->write_ref_array((HeapWord*)dst, length); 288 } 289 290 void ObjArrayKlass::copy_array(arrayOop s, int src_pos, arrayOop d, 291 int dst_pos, int length, TRAPS) { 292 assert(s->is_objArray(), "must be obj array"); 293 294 if (!d->is_objArray()) { 295 THROW(vmSymbols::java_lang_ArrayStoreException()); 296 } 297 298 // Check is all offsets and lengths are non negative 299 if (src_pos < 0 || dst_pos < 0 || length < 0) { 300 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 301 } 302 // Check if the ranges are valid 303 if ( (((unsigned int) length + (unsigned int) src_pos) > (unsigned int) s->length()) 304 || (((unsigned int) length + (unsigned int) dst_pos) > (unsigned int) d->length()) ) { 305 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 306 } 307 308 // Special case. Boundary cases must be checked first 309 // This allows the following call: copy_array(s, s.length(), d.length(), 0). 310 // This is correct, since the position is supposed to be an 'in between point', i.e., s.length(), 311 // points to the right of the last element. 312 if (length==0) { 313 return; 314 } 315 if (UseCompressedOops) { 316 narrowOop* const src = objArrayOop(s)->obj_at_addr<narrowOop>(src_pos); 317 narrowOop* const dst = objArrayOop(d)->obj_at_addr<narrowOop>(dst_pos); 318 do_copy<narrowOop>(s, src, d, dst, length, CHECK); 319 } else { 320 oop* const src = objArrayOop(s)->obj_at_addr<oop>(src_pos); 321 oop* const dst = objArrayOop(d)->obj_at_addr<oop>(dst_pos); 322 do_copy<oop> (s, src, d, dst, length, CHECK); 323 } 324 } 325 326 327 Klass* ObjArrayKlass::array_klass_impl(bool or_null, int n, TRAPS) { 328 329 assert(dimension() <= n, "check order of chain"); 330 int dim = dimension(); 331 if (dim == n) return this; 332 333 if (higher_dimension() == NULL) { 334 if (or_null) return NULL; 335 336 ResourceMark rm; 337 JavaThread *jt = (JavaThread *)THREAD; 338 { 339 MutexLocker mc(Compile_lock, THREAD); // for vtables 340 // Ensure atomic creation of higher dimensions 341 MutexLocker mu(MultiArray_lock, THREAD); 342 343 // Check if another thread beat us 344 if (higher_dimension() == NULL) { 345 346 // Create multi-dim klass object and link them together 347 Klass* k = 348 ObjArrayKlass::allocate_objArray_klass(class_loader_data(), dim + 1, this, CHECK_NULL); 349 ObjArrayKlass* ak = ObjArrayKlass::cast(k); 350 ak->set_lower_dimension(this); 351 OrderAccess::storestore(); 352 set_higher_dimension(ak); 353 assert(ak->oop_is_objArray(), "incorrect initialization of ObjArrayKlass"); 354 } 355 } 356 } else { 357 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 358 } 359 360 ObjArrayKlass *ak = ObjArrayKlass::cast(higher_dimension()); 361 if (or_null) { 362 return ak->array_klass_or_null(n); 363 } 364 return ak->array_klass(n, THREAD); 365 } 366 367 Klass* ObjArrayKlass::array_klass_impl(bool or_null, TRAPS) { 368 return array_klass_impl(or_null, dimension() + 1, THREAD); 369 } 370 371 bool ObjArrayKlass::can_be_primary_super_slow() const { 372 if (!bottom_klass()->can_be_primary_super()) 373 // array of interfaces 374 return false; 375 else 376 return Klass::can_be_primary_super_slow(); 377 } 378 379 GrowableArray<Klass*>* ObjArrayKlass::compute_secondary_supers(int num_extra_slots) { 380 // interfaces = { cloneable_klass, serializable_klass, elemSuper[], ... }; 381 Array<Klass*>* elem_supers = element_klass()->secondary_supers(); 382 int num_elem_supers = elem_supers == NULL ? 0 : elem_supers->length(); 383 int num_secondaries = num_extra_slots + 2 + num_elem_supers; 384 if (num_secondaries == 2) { 385 // Must share this for correct bootstrapping! 386 set_secondary_supers(Universe::the_array_interfaces_array()); 387 return NULL; 388 } else { 389 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(num_elem_supers+2); 390 secondaries->push(SystemDictionary::Cloneable_klass()); 391 secondaries->push(SystemDictionary::Serializable_klass()); 392 for (int i = 0; i < num_elem_supers; i++) { 393 Klass* elem_super = (Klass*) elem_supers->at(i); 394 Klass* array_super = elem_super->array_klass_or_null(); 395 assert(array_super != NULL, "must already have been created"); 396 secondaries->push(array_super); 397 } 398 return secondaries; 399 } 400 } 401 402 bool ObjArrayKlass::compute_is_subtype_of(Klass* k) { 403 if (!k->oop_is_objArray()) 404 return ArrayKlass::compute_is_subtype_of(k); 405 406 ObjArrayKlass* oak = ObjArrayKlass::cast(k); 407 return element_klass()->is_subtype_of(oak->element_klass()); 408 } 409 410 void ObjArrayKlass::initialize(TRAPS) { 411 bottom_klass()->initialize(THREAD); // dispatches to either InstanceKlass or TypeArrayKlass 412 } 413 414 #define ObjArrayKlass_SPECIALIZED_OOP_ITERATE(T, a, p, do_oop) \ 415 { \ 416 T* p = (T*)(a)->base(); \ 417 T* const end = p + (a)->length(); \ 418 while (p < end) { \ 419 do_oop; \ 420 p++; \ 421 } \ 422 } 423 424 #define ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(T, a, p, low, high, do_oop) \ 425 { \ 426 T* const l = (T*)(low); \ 427 T* const h = (T*)(high); \ 428 T* p = (T*)(a)->base(); \ 429 T* end = p + (a)->length(); \ 430 if (p < l) p = l; \ 431 if (end > h) end = h; \ 432 while (p < end) { \ 433 do_oop; \ 434 ++p; \ 435 } \ 436 } 437 438 #define ObjArrayKlass_OOP_ITERATE(a, p, do_oop) \ 439 if (UseCompressedOops) { \ 440 ObjArrayKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ 441 a, p, do_oop) \ 442 } else { \ 443 ObjArrayKlass_SPECIALIZED_OOP_ITERATE(oop, \ 444 a, p, do_oop) \ 445 } 446 447 #define ObjArrayKlass_BOUNDED_OOP_ITERATE(a, p, low, high, do_oop) \ 448 if (UseCompressedOops) { \ 449 ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ 450 a, p, low, high, do_oop) \ 451 } else { \ 452 ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ 453 a, p, low, high, do_oop) \ 454 } 455 456 void ObjArrayKlass::oop_follow_contents(oop obj) { 457 assert (obj->is_array(), "obj must be array"); 458 MarkSweep::follow_klass(obj->klass()); 459 if (UseCompressedOops) { 460 objarray_follow_contents<narrowOop>(obj, 0); 461 } else { 462 objarray_follow_contents<oop>(obj, 0); 463 } 464 } 465 466 #if INCLUDE_ALL_GCS 467 void ObjArrayKlass::oop_follow_contents(ParCompactionManager* cm, 468 oop obj) { 469 assert(obj->is_array(), "obj must be array"); 470 PSParallelCompact::follow_klass(cm, obj->klass()); 471 if (UseCompressedOops) { 472 objarray_follow_contents<narrowOop>(cm, obj, 0); 473 } else { 474 objarray_follow_contents<oop>(cm, obj, 0); 475 } 476 } 477 #endif // INCLUDE_ALL_GCS 478 479 #define ObjArrayKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ 480 \ 481 int ObjArrayKlass::oop_oop_iterate##nv_suffix(oop obj, \ 482 OopClosureType* closure) { \ 483 assert (obj->is_array(), "obj must be array"); \ 484 objArrayOop a = objArrayOop(obj); \ 485 /* Get size before changing pointers. */ \ 486 /* Don't call size() or oop_size() since that is a virtual call. */ \ 487 int size = a->object_size(); \ 488 if_do_metadata_checked(closure, nv_suffix) { \ 489 closure->do_klass##nv_suffix(obj->klass()); \ 490 } \ 491 ObjArrayKlass_OOP_ITERATE(a, p, (closure)->do_oop##nv_suffix(p)) \ 492 return size; \ 493 } 494 495 #define ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ 496 \ 497 int ObjArrayKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \ 498 OopClosureType* closure, \ 499 MemRegion mr) { \ 500 assert(obj->is_array(), "obj must be array"); \ 501 objArrayOop a = objArrayOop(obj); \ 502 /* Get size before changing pointers. */ \ 503 /* Don't call size() or oop_size() since that is a virtual call */ \ 504 int size = a->object_size(); \ 505 if_do_metadata_checked(closure, nv_suffix) { \ 506 /* SSS: Do we need to pass down mr here? */ \ 507 closure->do_klass##nv_suffix(a->klass()); \ 508 } \ 509 ObjArrayKlass_BOUNDED_OOP_ITERATE( \ 510 a, p, mr.start(), mr.end(), (closure)->do_oop##nv_suffix(p)) \ 511 return size; \ 512 } 513 514 // Like oop_oop_iterate but only iterates over a specified range and only used 515 // for objArrayOops. 516 #define ObjArrayKlass_OOP_OOP_ITERATE_DEFN_r(OopClosureType, nv_suffix) \ 517 \ 518 int ObjArrayKlass::oop_oop_iterate_range##nv_suffix(oop obj, \ 519 OopClosureType* closure, \ 520 int start, int end) { \ 521 assert(obj->is_array(), "obj must be array"); \ 522 objArrayOop a = objArrayOop(obj); \ 523 /* Get size before changing pointers. */ \ 524 /* Don't call size() or oop_size() since that is a virtual call */ \ 525 int size = a->object_size(); \ 526 if (UseCompressedOops) { \ 527 HeapWord* low = start == 0 ? (HeapWord*)a : (HeapWord*)a->obj_at_addr<narrowOop>(start);\ 528 /* this might be wierd if end needs to be aligned on HeapWord boundary */ \ 529 HeapWord* high = (HeapWord*)((narrowOop*)a->base() + end); \ 530 MemRegion mr(low, high); \ 531 if_do_metadata_checked(closure, nv_suffix) { \ 532 /* SSS: Do we need to pass down mr here? */ \ 533 closure->do_klass##nv_suffix(a->klass()); \ 534 } \ 535 ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ 536 a, p, low, high, (closure)->do_oop##nv_suffix(p)) \ 537 } else { \ 538 HeapWord* low = start == 0 ? (HeapWord*)a : (HeapWord*)a->obj_at_addr<oop>(start); \ 539 HeapWord* high = (HeapWord*)((oop*)a->base() + end); \ 540 MemRegion mr(low, high); \ 541 if_do_metadata_checked(closure, nv_suffix) { \ 542 /* SSS: Do we need to pass down mr here? */ \ 543 closure->do_klass##nv_suffix(a->klass()); \ 544 } \ 545 ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ 546 a, p, low, high, (closure)->do_oop##nv_suffix(p)) \ 547 } \ 548 return size; \ 549 } 550 551 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DEFN) 552 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DEFN) 553 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m) 554 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m) 555 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_r) 556 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_r) 557 558 int ObjArrayKlass::oop_adjust_pointers(oop obj) { 559 assert(obj->is_objArray(), "obj must be obj array"); 560 objArrayOop a = objArrayOop(obj); 561 // Get size before changing pointers. 562 // Don't call size() or oop_size() since that is a virtual call. 563 int size = a->object_size(); 564 ObjArrayKlass_OOP_ITERATE(a, p, MarkSweep::adjust_pointer(p)) 565 return size; 566 } 567 568 #if INCLUDE_ALL_GCS 569 void ObjArrayKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { 570 assert(obj->is_objArray(), "obj must be obj array"); 571 ObjArrayKlass_OOP_ITERATE( \ 572 objArrayOop(obj), p, \ 573 if (PSScavenge::should_scavenge(p)) { \ 574 pm->claim_or_forward_depth(p); \ 575 }) 576 } 577 578 int ObjArrayKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { 579 assert (obj->is_objArray(), "obj must be obj array"); 580 objArrayOop a = objArrayOop(obj); 581 int size = a->object_size(); 582 ObjArrayKlass_OOP_ITERATE(a, p, PSParallelCompact::adjust_pointer(p)) 583 return size; 584 } 585 #endif // INCLUDE_ALL_GCS 586 587 // JVM support 588 589 jint ObjArrayKlass::compute_modifier_flags(TRAPS) const { 590 // The modifier for an objectArray is the same as its element 591 if (element_klass() == NULL) { 592 assert(Universe::is_bootstrapping(), "partial objArray only at startup"); 593 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 594 } 595 // Return the flags of the bottom element type. 596 jint element_flags = bottom_klass()->compute_modifier_flags(CHECK_0); 597 598 return (element_flags & (JVM_ACC_PUBLIC | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED)) 599 | (JVM_ACC_ABSTRACT | JVM_ACC_FINAL); 600 } 601 602 603 // Printing 604 605 void ObjArrayKlass::print_on(outputStream* st) const { 606 #ifndef PRODUCT 607 Klass::print_on(st); 608 st->print(" - instance klass: "); 609 element_klass()->print_value_on(st); 610 st->cr(); 611 #endif //PRODUCT 612 } 613 614 void ObjArrayKlass::print_value_on(outputStream* st) const { 615 assert(is_klass(), "must be klass"); 616 617 element_klass()->print_value_on(st); 618 st->print("[]"); 619 } 620 621 #ifndef PRODUCT 622 623 void ObjArrayKlass::oop_print_on(oop obj, outputStream* st) { 624 ArrayKlass::oop_print_on(obj, st); 625 assert(obj->is_objArray(), "must be objArray"); 626 objArrayOop oa = objArrayOop(obj); 627 int print_len = MIN2((intx) oa->length(), MaxElementPrintSize); 628 for(int index = 0; index < print_len; index++) { 629 st->print(" - %3d : ", index); 630 oa->obj_at(index)->print_value_on(st); 631 st->cr(); 632 } 633 int remaining = oa->length() - print_len; 634 if (remaining > 0) { 635 st->print_cr(" - <%d more elements, increase MaxElementPrintSize to print>", remaining); 636 } 637 } 638 639 #endif //PRODUCT 640 641 static int max_objArray_print_length = 4; 642 643 void ObjArrayKlass::oop_print_value_on(oop obj, outputStream* st) { 644 assert(obj->is_objArray(), "must be objArray"); 645 st->print("a "); 646 element_klass()->print_value_on(st); 647 int len = objArrayOop(obj)->length(); 648 st->print("[%d] ", len); 649 obj->print_address_on(st); 650 if (NOT_PRODUCT(PrintOopAddress ||) PrintMiscellaneous && (WizardMode || Verbose)) { 651 st->print("{"); 652 for (int i = 0; i < len; i++) { 653 if (i > max_objArray_print_length) { 654 st->print("..."); break; 655 } 656 st->print(" "INTPTR_FORMAT, (intptr_t)(void*)objArrayOop(obj)->obj_at(i)); 657 } 658 st->print(" }"); 659 } 660 } 661 662 const char* ObjArrayKlass::internal_name() const { 663 return external_name(); 664 } 665 666 667 // Verification 668 669 void ObjArrayKlass::verify_on(outputStream* st) { 670 ArrayKlass::verify_on(st); 671 guarantee(element_klass()->is_klass(), "should be klass"); 672 guarantee(bottom_klass()->is_klass(), "should be klass"); 673 Klass* bk = bottom_klass(); 674 guarantee(bk->oop_is_instance() || bk->oop_is_typeArray(), "invalid bottom klass"); 675 } 676 677 void ObjArrayKlass::oop_verify_on(oop obj, outputStream* st) { 678 ArrayKlass::oop_verify_on(obj, st); 679 guarantee(obj->is_objArray(), "must be objArray"); 680 objArrayOop oa = objArrayOop(obj); 681 for(int index = 0; index < oa->length(); index++) { 682 guarantee(oa->obj_at(index)->is_oop_or_null(), "should be oop"); 683 } 684 }