1 /* 2 * Copyright (c) 2020, 2024, 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 "cds/archiveBuilder.hpp" 27 #include "cds/archiveHeapWriter.hpp" 28 #include "cds/archiveUtils.hpp" 29 #include "cds/cdsConfig.hpp" 30 #include "cds/classPrelinker.hpp" 31 #include "cds/classPreloader.hpp" 32 #include "cds/cppVtables.hpp" 33 #include "cds/dumpAllocStats.hpp" 34 #include "cds/dynamicArchive.hpp" 35 #include "cds/finalImageRecipes.hpp" 36 #include "cds/heapShared.hpp" 37 #include "cds/metaspaceShared.hpp" 38 #include "cds/regeneratedClasses.hpp" 39 #include "classfile/classLoader.hpp" 40 #include "classfile/classLoaderExt.hpp" 41 #include "classfile/classLoaderDataShared.hpp" 42 #include "classfile/javaClasses.hpp" 43 #include "classfile/symbolTable.hpp" 44 #include "classfile/systemDictionaryShared.hpp" 45 #include "classfile/vmClasses.hpp" 46 #include "interpreter/abstractInterpreter.hpp" 47 #include "jvm.h" 48 #include "logging/log.hpp" 49 #include "logging/logStream.hpp" 50 #include "memory/allStatic.hpp" 51 #include "memory/memRegion.hpp" 52 #include "memory/resourceArea.hpp" 53 #include "oops/compressedKlass.inline.hpp" 54 #include "oops/instanceKlass.hpp" 55 #include "oops/objArrayKlass.hpp" 56 #include "oops/objArrayOop.inline.hpp" 57 #include "oops/oopHandle.inline.hpp" 58 #include "oops/trainingData.hpp" 59 #include "runtime/arguments.hpp" 60 #include "runtime/fieldDescriptor.inline.hpp" 61 #include "runtime/globals_extension.hpp" 62 #include "runtime/javaThread.hpp" 63 #include "runtime/sharedRuntime.hpp" 64 #include "utilities/align.hpp" 65 #include "utilities/bitMap.inline.hpp" 66 #include "utilities/formatBuffer.hpp" 67 68 ArchiveBuilder* ArchiveBuilder::_current = nullptr; 69 70 ArchiveBuilder::OtherROAllocMark::~OtherROAllocMark() { 71 char* newtop = ArchiveBuilder::current()->_ro_region.top(); 72 ArchiveBuilder::alloc_stats()->record_other_type(int(newtop - _oldtop), true); 73 } 74 75 ArchiveBuilder::SourceObjList::SourceObjList() : _ptrmap(16 * K, mtClassShared) { 76 _total_bytes = 0; 77 _objs = new (mtClassShared) GrowableArray<SourceObjInfo*>(128 * K, mtClassShared); 78 } 79 80 ArchiveBuilder::SourceObjList::~SourceObjList() { 81 delete _objs; 82 } 83 84 void ArchiveBuilder::SourceObjList::append(SourceObjInfo* src_info) { 85 // Save this source object for copying 86 src_info->set_id(_objs->length()); 87 _objs->append(src_info); 88 89 // Prepare for marking the pointers in this source object 90 assert(is_aligned(_total_bytes, sizeof(address)), "must be"); 91 src_info->set_ptrmap_start(_total_bytes / sizeof(address)); 92 _total_bytes = align_up(_total_bytes + (uintx)src_info->size_in_bytes(), sizeof(address)); 93 src_info->set_ptrmap_end(_total_bytes / sizeof(address)); 94 95 BitMap::idx_t bitmap_size_needed = BitMap::idx_t(src_info->ptrmap_end()); 96 if (_ptrmap.size() <= bitmap_size_needed) { 97 _ptrmap.resize((bitmap_size_needed + 1) * 2); 98 } 99 } 100 101 void ArchiveBuilder::SourceObjList::remember_embedded_pointer(SourceObjInfo* src_info, MetaspaceClosure::Ref* ref) { 102 // src_obj contains a pointer. Remember the location of this pointer in _ptrmap, 103 // so that we can copy/relocate it later. 104 src_info->set_has_embedded_pointer(); 105 address src_obj = src_info->source_addr(); 106 address* field_addr = ref->addr(); 107 assert(src_info->ptrmap_start() < _total_bytes, "sanity"); 108 assert(src_info->ptrmap_end() <= _total_bytes, "sanity"); 109 assert(*field_addr != nullptr, "should have checked"); 110 111 intx field_offset_in_bytes = ((address)field_addr) - src_obj; 112 DEBUG_ONLY(int src_obj_size = src_info->size_in_bytes();) 113 assert(field_offset_in_bytes >= 0, "must be"); 114 assert(field_offset_in_bytes + intx(sizeof(intptr_t)) <= intx(src_obj_size), "must be"); 115 assert(is_aligned(field_offset_in_bytes, sizeof(address)), "must be"); 116 117 BitMap::idx_t idx = BitMap::idx_t(src_info->ptrmap_start() + (uintx)(field_offset_in_bytes / sizeof(address))); 118 _ptrmap.set_bit(BitMap::idx_t(idx)); 119 } 120 121 class RelocateEmbeddedPointers : public BitMapClosure { 122 ArchiveBuilder* _builder; 123 address _buffered_obj; 124 BitMap::idx_t _start_idx; 125 public: 126 RelocateEmbeddedPointers(ArchiveBuilder* builder, address buffered_obj, BitMap::idx_t start_idx) : 127 _builder(builder), _buffered_obj(buffered_obj), _start_idx(start_idx) {} 128 129 bool do_bit(BitMap::idx_t bit_offset) { 130 size_t field_offset = size_t(bit_offset - _start_idx) * sizeof(address); 131 address* ptr_loc = (address*)(_buffered_obj + field_offset); 132 133 address old_p = *ptr_loc; 134 address new_p = _builder->get_buffered_addr(old_p); 135 136 log_trace(cds)("Ref: [" PTR_FORMAT "] -> " PTR_FORMAT " => " PTR_FORMAT, 137 p2i(ptr_loc), p2i(old_p), p2i(new_p)); 138 139 ArchivePtrMarker::set_and_mark_pointer(ptr_loc, new_p); 140 return true; // keep iterating the bitmap 141 } 142 }; 143 144 void ArchiveBuilder::SourceObjList::relocate(int i, ArchiveBuilder* builder) { 145 SourceObjInfo* src_info = objs()->at(i); 146 assert(src_info->should_copy(), "must be"); 147 BitMap::idx_t start = BitMap::idx_t(src_info->ptrmap_start()); // inclusive 148 BitMap::idx_t end = BitMap::idx_t(src_info->ptrmap_end()); // exclusive 149 150 RelocateEmbeddedPointers relocator(builder, src_info->buffered_addr(), start); 151 _ptrmap.iterate(&relocator, start, end); 152 } 153 154 ArchiveBuilder::ArchiveBuilder() : 155 _current_dump_region(nullptr), 156 _buffer_bottom(nullptr), 157 _last_verified_top(nullptr), 158 _num_dump_regions_used(0), 159 _other_region_used_bytes(0), 160 _requested_static_archive_bottom(nullptr), 161 _requested_static_archive_top(nullptr), 162 _requested_dynamic_archive_bottom(nullptr), 163 _requested_dynamic_archive_top(nullptr), 164 _mapped_static_archive_bottom(nullptr), 165 _mapped_static_archive_top(nullptr), 166 _buffer_to_requested_delta(0), 167 _rw_region("rw", MAX_SHARED_DELTA), 168 _ro_region("ro", MAX_SHARED_DELTA), 169 _cc_region("cc", MAX_SHARED_DELTA), 170 _ptrmap(mtClassShared), 171 _rw_ptrmap(mtClassShared), 172 _ro_ptrmap(mtClassShared), 173 _cc_ptrmap(mtClassShared), 174 _rw_src_objs(), 175 _ro_src_objs(), 176 _src_obj_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE), 177 _buffered_to_src_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE), 178 _total_heap_region_size(0), 179 _estimated_metaspaceobj_bytes(0), 180 _estimated_hashtable_bytes(0) 181 { 182 _klasses = new (mtClassShared) GrowableArray<Klass*>(4 * K, mtClassShared); 183 _symbols = new (mtClassShared) GrowableArray<Symbol*>(256 * K, mtClassShared); 184 _entropy_seed = 0x12345678; 185 assert(_current == nullptr, "must be"); 186 _current = this; 187 } 188 189 ArchiveBuilder::~ArchiveBuilder() { 190 assert(_current == this, "must be"); 191 _current = nullptr; 192 193 for (int i = 0; i < _symbols->length(); i++) { 194 _symbols->at(i)->decrement_refcount(); 195 } 196 197 delete _klasses; 198 delete _symbols; 199 if (_shared_rs.is_reserved()) { 200 _shared_rs.release(); 201 } 202 } 203 204 // Returns a deterministic sequence of pseudo random numbers. The main purpose is NOT 205 // for randomness but to get good entropy for the identity_hash() of archived Symbols, 206 // while keeping the contents of static CDS archives deterministic to ensure 207 // reproducibility of JDK builds. 208 int ArchiveBuilder::entropy() { 209 assert(SafepointSynchronize::is_at_safepoint(), "needed to ensure deterministic sequence"); 210 _entropy_seed = os::next_random(_entropy_seed); 211 return static_cast<int>(_entropy_seed); 212 } 213 214 class GatherKlassesAndSymbols : public UniqueMetaspaceClosure { 215 ArchiveBuilder* _builder; 216 217 public: 218 GatherKlassesAndSymbols(ArchiveBuilder* builder) : _builder(builder) {} 219 220 virtual bool do_unique_ref(Ref* ref, bool read_only) { 221 return _builder->gather_klass_and_symbol(ref, read_only); 222 } 223 }; 224 225 bool ArchiveBuilder::gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only) { 226 if (ref->obj() == nullptr) { 227 return false; 228 } 229 if (get_follow_mode(ref) != make_a_copy) { 230 return false; 231 } 232 if (ref->msotype() == MetaspaceObj::ClassType) { 233 Klass* klass = (Klass*)ref->obj(); 234 assert(klass->is_klass(), "must be"); 235 if (!is_excluded(klass)) { 236 _klasses->append(klass); 237 if (klass->is_hidden() && klass->is_instance_klass()) { 238 update_hidden_class_loader_type(InstanceKlass::cast(klass)); 239 } 240 } 241 // See RunTimeClassInfo::get_for() 242 _estimated_metaspaceobj_bytes += align_up(BytesPerWord, SharedSpaceObjectAlignment); 243 } else if (ref->msotype() == MetaspaceObj::SymbolType) { 244 // Make sure the symbol won't be GC'ed while we are dumping the archive. 245 Symbol* sym = (Symbol*)ref->obj(); 246 sym->increment_refcount(); 247 _symbols->append(sym); 248 } 249 250 int bytes = ref->size() * BytesPerWord; 251 _estimated_metaspaceobj_bytes += align_up(bytes, SharedSpaceObjectAlignment); 252 253 return true; // recurse 254 } 255 256 void ArchiveBuilder::gather_klasses_and_symbols() { 257 ResourceMark rm; 258 log_info(cds)("Gathering classes and symbols ... "); 259 GatherKlassesAndSymbols doit(this); 260 iterate_roots(&doit); 261 #if INCLUDE_CDS_JAVA_HEAP 262 if (CDSConfig::is_dumping_full_module_graph()) { 263 ClassLoaderDataShared::iterate_symbols(&doit); 264 } 265 #endif 266 doit.finish(); 267 268 if (CDSConfig::is_dumping_static_archive()) { 269 // To ensure deterministic contents in the static archive, we need to ensure that 270 // we iterate the MetaspaceObjs in a deterministic order. It doesn't matter where 271 // the MetaspaceObjs are located originally, as they are copied sequentially into 272 // the archive during the iteration. 273 // 274 // The only issue here is that the symbol table and the system directories may be 275 // randomly ordered, so we copy the symbols and klasses into two arrays and sort 276 // them deterministically. 277 // 278 // During -Xshare:dump, the order of Symbol creation is strictly determined by 279 // the SharedClassListFile (class loading is done in a single thread and the JIT 280 // is disabled). Also, Symbols are allocated in monotonically increasing addresses 281 // (see Symbol::operator new(size_t, int)). So if we iterate the Symbols by 282 // ascending address order, we ensure that all Symbols are copied into deterministic 283 // locations in the archive. 284 // 285 // TODO: in the future, if we want to produce deterministic contents in the 286 // dynamic archive, we might need to sort the symbols alphabetically (also see 287 // DynamicArchiveBuilder::sort_methods()). 288 log_info(cds)("Sorting symbols ... "); 289 _symbols->sort(compare_symbols_by_address); 290 sort_klasses(); 291 292 // TODO -- we need a proper estimate for the archived modules, etc, 293 // but this should be enough for now 294 _estimated_metaspaceobj_bytes += 200 * 1024 * 1024; 295 } 296 } 297 298 #if INCLUDE_CDS_JAVA_HEAP 299 300 void ArchiveBuilder::update_hidden_class_loader_type(InstanceKlass* ik) { 301 s2 classloader_type; 302 if (HeapShared::is_lambda_form_klass(ik)) { 303 assert(CDSConfig::is_dumping_invokedynamic(), "lambda form classes are archived only if CDSConfig::is_dumping_invokedynamic() is true"); 304 classloader_type = ClassLoader::BOOT_LOADER; 305 } else if (SystemDictionaryShared::should_hidden_class_be_archived(ik)) { 306 oop loader = ik->class_loader(); 307 308 if (loader == nullptr) { 309 classloader_type = ClassLoader::BOOT_LOADER; 310 } else if (SystemDictionary::is_platform_class_loader(loader)) { 311 classloader_type = ClassLoader::PLATFORM_LOADER; 312 } else if (SystemDictionary::is_system_class_loader(loader)) { 313 classloader_type = ClassLoader::APP_LOADER; 314 } else { 315 ShouldNotReachHere(); 316 } 317 } else { 318 ShouldNotReachHere(); 319 } 320 321 ik->set_shared_class_loader_type(classloader_type); 322 if (HeapShared::is_lambda_proxy_klass(ik)) { 323 InstanceKlass* nest_host = ik->nest_host_not_null(); 324 ik->set_shared_classpath_index(nest_host->shared_classpath_index()); 325 } else if (!HeapShared::is_lambda_form_klass(ik)) { 326 // Injected invoker classes: fake this for now. Probably not needed! 327 if (classloader_type == ClassLoader::APP_LOADER) { 328 ik->set_shared_classpath_index(ClassLoaderExt::app_class_paths_start_index()); // HACK 329 } else { 330 ik->set_shared_classpath_index(0); 331 } 332 } 333 } 334 335 #endif //INCLUDE_CDS_JAVA_HEAP 336 337 int ArchiveBuilder::compare_symbols_by_address(Symbol** a, Symbol** b) { 338 if (a[0] < b[0]) { 339 return -1; 340 } else { 341 assert(a[0] > b[0], "Duplicated symbol %s unexpected", (*a)->as_C_string()); 342 return 1; 343 } 344 } 345 346 int ArchiveBuilder::compare_klass_by_name(Klass** a, Klass** b) { 347 return a[0]->name()->fast_compare(b[0]->name()); 348 } 349 350 void ArchiveBuilder::sort_klasses() { 351 log_info(cds)("Sorting classes ... "); 352 _klasses->sort(compare_klass_by_name); 353 } 354 355 size_t ArchiveBuilder::estimate_archive_size() { 356 // size of the symbol table and two dictionaries, plus the RunTimeClassInfo's 357 size_t symbol_table_est = SymbolTable::estimate_size_for_archive(); 358 size_t dictionary_est = SystemDictionaryShared::estimate_size_for_archive(); 359 size_t training_data_est = TrainingData::estimate_size_for_archive(); 360 _estimated_hashtable_bytes = symbol_table_est + dictionary_est + training_data_est; 361 362 if (CDSConfig::is_dumping_final_static_archive()) { 363 _estimated_hashtable_bytes += 200 * 1024 * 1024; // FIXME -- need to iterate archived symbols?? 364 } 365 366 if (CDSConfig::is_dumping_dynamic_archive()) { 367 // Some extra space for traning data. Be generous. Unused areas will be trimmed from the archive file. 368 _estimated_hashtable_bytes += 200 * 1024 * 1024; 369 } 370 size_t total = 0; 371 372 total += _estimated_metaspaceobj_bytes; 373 total += _estimated_hashtable_bytes; 374 375 // allow fragmentation at the end of each dump region 376 total += _total_dump_regions * MetaspaceShared::core_region_alignment(); 377 378 log_info(cds)("_estimated_hashtable_bytes = " SIZE_FORMAT " + " SIZE_FORMAT " = " SIZE_FORMAT, 379 symbol_table_est, dictionary_est, _estimated_hashtable_bytes); 380 log_info(cds)("_estimated_metaspaceobj_bytes = " SIZE_FORMAT, _estimated_metaspaceobj_bytes); 381 log_info(cds)("total estimate bytes = " SIZE_FORMAT, total); 382 383 return align_up(total, MetaspaceShared::core_region_alignment()); 384 } 385 386 address ArchiveBuilder::reserve_buffer() { 387 size_t buffer_size = estimate_archive_size(); 388 ReservedSpace rs(buffer_size, MetaspaceShared::core_region_alignment(), os::vm_page_size()); 389 if (!rs.is_reserved()) { 390 log_error(cds)("Failed to reserve " SIZE_FORMAT " bytes of output buffer.", buffer_size); 391 MetaspaceShared::unrecoverable_writing_error(); 392 } 393 394 // buffer_bottom is the lowest address of the 2 core regions (rw, ro) when 395 // we are copying the class metadata into the buffer. 396 address buffer_bottom = (address)rs.base(); 397 log_info(cds)("Reserved output buffer space at " PTR_FORMAT " [" SIZE_FORMAT " bytes]", 398 p2i(buffer_bottom), buffer_size); 399 _shared_rs = rs; 400 401 _buffer_bottom = buffer_bottom; 402 _last_verified_top = buffer_bottom; 403 _current_dump_region = &_rw_region; 404 _num_dump_regions_used = 1; 405 _other_region_used_bytes = 0; 406 _current_dump_region->init(&_shared_rs, &_shared_vs); 407 408 ArchivePtrMarker::initialize(&_ptrmap, &_shared_vs); 409 410 // The bottom of the static archive should be mapped at this address by default. 411 _requested_static_archive_bottom = (address)MetaspaceShared::requested_base_address(); 412 413 // The bottom of the archive (that I am writing now) should be mapped at this address by default. 414 address my_archive_requested_bottom; 415 416 if (CDSConfig::is_dumping_static_archive()) { 417 my_archive_requested_bottom = _requested_static_archive_bottom; 418 } else { 419 _mapped_static_archive_bottom = (address)MetaspaceObj::shared_metaspace_base(); 420 _mapped_static_archive_top = (address)MetaspaceObj::shared_metaspace_top(); 421 assert(_mapped_static_archive_top >= _mapped_static_archive_bottom, "must be"); 422 size_t static_archive_size = _mapped_static_archive_top - _mapped_static_archive_bottom; 423 424 // At run time, we will mmap the dynamic archive at my_archive_requested_bottom 425 _requested_static_archive_top = _requested_static_archive_bottom + static_archive_size; 426 my_archive_requested_bottom = align_up(_requested_static_archive_top, MetaspaceShared::core_region_alignment()); 427 428 _requested_dynamic_archive_bottom = my_archive_requested_bottom; 429 } 430 431 _buffer_to_requested_delta = my_archive_requested_bottom - _buffer_bottom; 432 433 address my_archive_requested_top = my_archive_requested_bottom + buffer_size; 434 if (my_archive_requested_bottom < _requested_static_archive_bottom || 435 my_archive_requested_top <= _requested_static_archive_bottom) { 436 // Size overflow. 437 log_error(cds)("my_archive_requested_bottom = " INTPTR_FORMAT, p2i(my_archive_requested_bottom)); 438 log_error(cds)("my_archive_requested_top = " INTPTR_FORMAT, p2i(my_archive_requested_top)); 439 log_error(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is too high. " 440 "Please rerun java -Xshare:dump with a lower value", p2i(_requested_static_archive_bottom)); 441 MetaspaceShared::unrecoverable_writing_error(); 442 } 443 444 if (CDSConfig::is_dumping_static_archive()) { 445 // We don't want any valid object to be at the very bottom of the archive. 446 // See ArchivePtrMarker::mark_pointer(). 447 rw_region()->allocate(16); 448 } 449 450 return buffer_bottom; 451 } 452 453 void ArchiveBuilder::iterate_sorted_roots(MetaspaceClosure* it) { 454 int num_symbols = _symbols->length(); 455 for (int i = 0; i < num_symbols; i++) { 456 it->push(_symbols->adr_at(i)); 457 } 458 459 int num_klasses = _klasses->length(); 460 for (int i = 0; i < num_klasses; i++) { 461 it->push(_klasses->adr_at(i)); 462 } 463 464 iterate_roots(it); 465 } 466 467 class GatherSortedSourceObjs : public MetaspaceClosure { 468 ArchiveBuilder* _builder; 469 470 public: 471 GatherSortedSourceObjs(ArchiveBuilder* builder) : _builder(builder) {} 472 473 virtual bool do_ref(Ref* ref, bool read_only) { 474 return _builder->gather_one_source_obj(ref, read_only); 475 } 476 }; 477 478 bool ArchiveBuilder::gather_one_source_obj(MetaspaceClosure::Ref* ref, bool read_only) { 479 address src_obj = ref->obj(); 480 if (src_obj == nullptr) { 481 return false; 482 } 483 484 remember_embedded_pointer_in_enclosing_obj(ref); 485 if (RegeneratedClasses::has_been_regenerated(src_obj)) { 486 // No need to copy it. We will later relocate it to point to the regenerated klass/method. 487 return false; 488 } 489 490 FollowMode follow_mode = get_follow_mode(ref); 491 SourceObjInfo src_info(ref, read_only, follow_mode); 492 bool created; 493 SourceObjInfo* p = _src_obj_table.put_if_absent(src_obj, src_info, &created); 494 if (created) { 495 if (_src_obj_table.maybe_grow()) { 496 log_info(cds, hashtables)("Expanded _src_obj_table table to %d", _src_obj_table.table_size()); 497 } 498 } 499 500 #ifdef ASSERT 501 if (ref->msotype() == MetaspaceObj::MethodType) { 502 Method* m = (Method*)ref->obj(); 503 assert(!RegeneratedClasses::has_been_regenerated((address)m->method_holder()), 504 "Should not archive methods in a class that has been regenerated"); 505 } 506 #endif 507 508 assert(p->read_only() == src_info.read_only(), "must be"); 509 510 if (created && src_info.should_copy()) { 511 if (read_only) { 512 _ro_src_objs.append(p); 513 } else { 514 _rw_src_objs.append(p); 515 } 516 return true; // Need to recurse into this ref only if we are copying it 517 } else { 518 return false; 519 } 520 } 521 522 void ArchiveBuilder::record_regenerated_object(address orig_src_obj, address regen_src_obj) { 523 // Record the fact that orig_src_obj has been replaced by regen_src_obj. All calls to get_buffered_addr(orig_src_obj) 524 // should return the same value as get_buffered_addr(regen_src_obj). 525 SourceObjInfo* p = _src_obj_table.get(regen_src_obj); 526 assert(p != nullptr, "regenerated object should always be dumped"); 527 SourceObjInfo orig_src_info(orig_src_obj, p); 528 bool created; 529 _src_obj_table.put_if_absent(orig_src_obj, orig_src_info, &created); 530 assert(created, "We shouldn't have archived the original copy of a regenerated object"); 531 } 532 533 // Remember that we have a pointer inside ref->enclosing_obj() that points to ref->obj() 534 void ArchiveBuilder::remember_embedded_pointer_in_enclosing_obj(MetaspaceClosure::Ref* ref) { 535 assert(ref->obj() != nullptr, "should have checked"); 536 537 address enclosing_obj = ref->enclosing_obj(); 538 if (enclosing_obj == nullptr) { 539 return; 540 } 541 542 // We are dealing with 3 addresses: 543 // address o = ref->obj(): We have found an object whose address is o. 544 // address* mpp = ref->mpp(): The object o is pointed to by a pointer whose address is mpp. 545 // I.e., (*mpp == o) 546 // enclosing_obj : If non-null, it is the object which has a field that points to o. 547 // mpp is the address if that field. 548 // 549 // Example: We have an array whose first element points to a Method: 550 // Method* o = 0x0000abcd; 551 // Array<Method*>* enclosing_obj = 0x00001000; 552 // enclosing_obj->at_put(0, o); 553 // 554 // We the MetaspaceClosure iterates on the very first element of this array, we have 555 // ref->obj() == 0x0000abcd (the Method) 556 // ref->mpp() == 0x00001008 (the location of the first element in the array) 557 // ref->enclosing_obj() == 0x00001000 (the Array that contains the Method) 558 // 559 // We use the above information to mark the bitmap to indicate that there's a pointer on address 0x00001008. 560 SourceObjInfo* src_info = _src_obj_table.get(enclosing_obj); 561 if (src_info == nullptr || !src_info->should_copy()) { 562 // source objects of point_to_it/set_to_null types are not copied 563 // so we don't need to remember their pointers. 564 } else { 565 if (src_info->read_only()) { 566 _ro_src_objs.remember_embedded_pointer(src_info, ref); 567 } else { 568 _rw_src_objs.remember_embedded_pointer(src_info, ref); 569 } 570 } 571 } 572 573 void ArchiveBuilder::gather_source_objs() { 574 ResourceMark rm; 575 log_info(cds)("Gathering all archivable objects ... "); 576 gather_klasses_and_symbols(); 577 GatherSortedSourceObjs doit(this); 578 iterate_sorted_roots(&doit); 579 doit.finish(); 580 } 581 582 bool ArchiveBuilder::is_excluded(Klass* klass) { 583 if (klass->is_instance_klass()) { 584 InstanceKlass* ik = InstanceKlass::cast(klass); 585 return SystemDictionaryShared::is_excluded_class(ik); 586 } else if (klass->is_objArray_klass()) { 587 Klass* bottom = ObjArrayKlass::cast(klass)->bottom_klass(); 588 if (CDSConfig::is_dumping_dynamic_archive() && MetaspaceShared::is_shared_static(bottom)) { 589 // The bottom class is in the static archive so it's clearly not excluded. 590 assert(CDSConfig::is_dumping_dynamic_archive(), "sanity"); 591 return false; 592 } else if (bottom->is_instance_klass()) { 593 return SystemDictionaryShared::is_excluded_class(InstanceKlass::cast(bottom)); 594 } 595 } 596 597 return false; 598 } 599 600 ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref *ref) { 601 address obj = ref->obj(); 602 if (CDSConfig::is_dumping_dynamic_archive() && MetaspaceShared::is_in_shared_metaspace(obj)) { 603 // Don't dump existing shared metadata again. 604 return point_to_it; 605 } else if (ref->msotype() == MetaspaceObj::MethodDataType || 606 ref->msotype() == MetaspaceObj::MethodCountersType || 607 ref->msotype() == MetaspaceObj::KlassTrainingDataType || 608 ref->msotype() == MetaspaceObj::MethodTrainingDataType || 609 ref->msotype() == MetaspaceObj::CompileTrainingDataType) { 610 return TrainingData::need_data() ? make_a_copy : set_to_null; 611 } else { 612 if (ref->msotype() == MetaspaceObj::ClassType) { 613 Klass* klass = (Klass*)ref->obj(); 614 assert(klass->is_klass(), "must be"); 615 if (is_excluded(klass)) { 616 ResourceMark rm; 617 log_debug(cds, dynamic)("Skipping class (excluded): %s", klass->external_name()); 618 return set_to_null; 619 } 620 } 621 622 return make_a_copy; 623 } 624 } 625 626 void ArchiveBuilder::start_dump_region(DumpRegion* next) { 627 address bottom = _last_verified_top; 628 address top = (address)(current_dump_region()->top()); 629 _other_region_used_bytes += size_t(top - bottom); 630 631 current_dump_region()->pack(next); 632 _current_dump_region = next; 633 _num_dump_regions_used ++; 634 635 _last_verified_top = (address)(current_dump_region()->top()); 636 } 637 638 void ArchiveBuilder::verify_estimate_size(size_t estimate, const char* which) { 639 address bottom = _last_verified_top; 640 address top = (address)(current_dump_region()->top()); 641 size_t used = size_t(top - bottom) + _other_region_used_bytes; 642 int diff = int(estimate) - int(used); 643 644 log_info(cds)("%s estimate = " SIZE_FORMAT " used = " SIZE_FORMAT "; diff = %d bytes", which, estimate, used, diff); 645 assert(diff >= 0, "Estimate is too small"); 646 647 _last_verified_top = top; 648 _other_region_used_bytes = 0; 649 } 650 651 char* ArchiveBuilder::ro_strdup(const char* s) { 652 char* archived_str = ro_region_alloc((int)strlen(s) + 1); 653 strcpy(archived_str, s); 654 return archived_str; 655 } 656 657 // The objects that have embedded pointers will sink 658 // towards the end of the list. This ensures we have a maximum 659 // number of leading zero bits in the relocation bitmap. 660 int ArchiveBuilder::compare_src_objs(SourceObjInfo** a, SourceObjInfo** b) { 661 if ((*a)->has_embedded_pointer() && !(*b)->has_embedded_pointer()) { 662 return 1; 663 } else if (!(*a)->has_embedded_pointer() && (*b)->has_embedded_pointer()) { 664 return -1; 665 } else { 666 // This is necessary to keep the sorting order stable. Otherwise the 667 // archive's contents may not be deterministic. 668 return (*a)->id() - (*b)->id(); 669 } 670 } 671 672 void ArchiveBuilder::sort_metadata_objs() { 673 _rw_src_objs.objs()->sort(compare_src_objs); 674 _ro_src_objs.objs()->sort(compare_src_objs); 675 } 676 677 void ArchiveBuilder::dump_rw_metadata() { 678 ResourceMark rm; 679 log_info(cds)("Allocating RW objects ... "); 680 make_shallow_copies(&_rw_region, &_rw_src_objs); 681 682 #if INCLUDE_CDS_JAVA_HEAP 683 if (CDSConfig::is_dumping_full_module_graph()) { 684 // Archive the ModuleEntry's and PackageEntry's of the 3 built-in loaders 685 char* start = rw_region()->top(); 686 ClassLoaderDataShared::allocate_archived_tables(); 687 alloc_stats()->record_modules(rw_region()->top() - start, /*read_only*/false); 688 } 689 #endif 690 } 691 692 void ArchiveBuilder::dump_ro_metadata() { 693 ResourceMark rm; 694 log_info(cds)("Allocating RO objects ... "); 695 696 start_dump_region(&_ro_region); 697 make_shallow_copies(&_ro_region, &_ro_src_objs); 698 699 #if INCLUDE_CDS_JAVA_HEAP 700 if (CDSConfig::is_dumping_full_module_graph()) { 701 char* start = ro_region()->top(); 702 ClassLoaderDataShared::init_archived_tables(); 703 alloc_stats()->record_modules(ro_region()->top() - start, /*read_only*/true); 704 } 705 #endif 706 707 RegeneratedClasses::record_regenerated_objects(); 708 } 709 710 void ArchiveBuilder::make_shallow_copies(DumpRegion *dump_region, 711 const ArchiveBuilder::SourceObjList* src_objs) { 712 for (int i = 0; i < src_objs->objs()->length(); i++) { 713 make_shallow_copy(dump_region, src_objs->objs()->at(i)); 714 } 715 log_info(cds)("done (%d objects)", src_objs->objs()->length()); 716 } 717 718 void ArchiveBuilder::make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info) { 719 address src = src_info->source_addr(); 720 int bytes = src_info->size_in_bytes(); 721 char* dest; 722 char* oldtop; 723 char* newtop; 724 725 oldtop = dump_region->top(); 726 if (src_info->msotype() == MetaspaceObj::ClassType) { 727 // Save a pointer immediate in front of an InstanceKlass, so 728 // we can do a quick lookup from InstanceKlass* -> RunTimeClassInfo* 729 // without building another hashtable. See RunTimeClassInfo::get_for() 730 // in systemDictionaryShared.cpp. 731 Klass* klass = (Klass*)src; 732 if (klass->is_instance_klass()) { 733 SystemDictionaryShared::validate_before_archiving(InstanceKlass::cast(klass)); 734 dump_region->allocate(sizeof(address)); 735 } 736 } 737 dest = dump_region->allocate(bytes); 738 newtop = dump_region->top(); 739 740 memcpy(dest, src, bytes); 741 742 // Update the hash of buffered sorted symbols for static dump so that the symbols have deterministic contents 743 if (CDSConfig::is_dumping_static_archive() && (src_info->msotype() == MetaspaceObj::SymbolType)) { 744 Symbol* buffered_symbol = (Symbol*)dest; 745 assert(((Symbol*)src)->is_permanent(), "archived symbols must be permanent"); 746 buffered_symbol->update_identity_hash(); 747 } 748 749 { 750 bool created; 751 _buffered_to_src_table.put_if_absent((address)dest, src, &created); 752 assert(created, "must be"); 753 if (_buffered_to_src_table.maybe_grow()) { 754 log_info(cds, hashtables)("Expanded _buffered_to_src_table table to %d", _buffered_to_src_table.table_size()); 755 } 756 } 757 758 intptr_t* archived_vtable = CppVtables::get_archived_vtable(src_info->msotype(), (address)dest); 759 if (archived_vtable != nullptr) { 760 *(address*)dest = (address)archived_vtable; 761 ArchivePtrMarker::mark_pointer((address*)dest); 762 } 763 764 log_trace(cds)("Copy: " PTR_FORMAT " ==> " PTR_FORMAT " %d", p2i(src), p2i(dest), bytes); 765 src_info->set_buffered_addr((address)dest); 766 767 _alloc_stats.record(src_info->msotype(), int(newtop - oldtop), src_info->read_only()); 768 } 769 770 // This is used by code that hand-assembles data structures, such as the LambdaProxyClassKey, that are 771 // not handled by MetaspaceClosure. 772 void ArchiveBuilder::write_pointer_in_buffer(address* ptr_location, address src_addr) { 773 assert(is_in_buffer_space(ptr_location), "must be"); 774 if (src_addr == nullptr) { 775 *ptr_location = nullptr; 776 ArchivePtrMarker::clear_pointer(ptr_location); 777 } else { 778 *ptr_location = get_buffered_addr(src_addr); 779 ArchivePtrMarker::mark_pointer(ptr_location); 780 } 781 } 782 783 void ArchiveBuilder::mark_and_relocate_to_buffered_addr(address* ptr_location) { 784 assert(*ptr_location != nullptr, "sanity"); 785 if (!is_in_mapped_static_archive(*ptr_location)) { 786 *ptr_location = get_buffered_addr(*ptr_location); 787 } 788 ArchivePtrMarker::mark_pointer(ptr_location); 789 } 790 791 address ArchiveBuilder::get_buffered_addr(address src_addr) const { 792 SourceObjInfo* p = _src_obj_table.get(src_addr); 793 assert(p != nullptr, "src_addr " INTPTR_FORMAT " is used but has not been archived", 794 p2i(src_addr)); 795 796 return p->buffered_addr(); 797 } 798 799 bool ArchiveBuilder::has_been_archived(address src_addr) const { 800 SourceObjInfo* p = _src_obj_table.get(src_addr); 801 return (p != nullptr); 802 } 803 804 address ArchiveBuilder::get_source_addr(address buffered_addr) const { 805 assert(is_in_buffer_space(buffered_addr), "must be"); 806 address* src_p = _buffered_to_src_table.get(buffered_addr); 807 assert(src_p != nullptr && *src_p != nullptr, "must be"); 808 return *src_p; 809 } 810 811 void ArchiveBuilder::relocate_embedded_pointers(ArchiveBuilder::SourceObjList* src_objs) { 812 for (int i = 0; i < src_objs->objs()->length(); i++) { 813 src_objs->relocate(i, this); 814 } 815 } 816 817 void ArchiveBuilder::relocate_metaspaceobj_embedded_pointers() { 818 log_info(cds)("Relocating embedded pointers in core regions ... "); 819 relocate_embedded_pointers(&_rw_src_objs); 820 relocate_embedded_pointers(&_ro_src_objs); 821 } 822 823 #define ADD_COUNT(x) \ 824 x += 1; \ 825 x ## _p += preloaded; \ 826 x ## _i += inited; 827 828 #define DECLARE_INSTANCE_KLASS_COUNTER(x) \ 829 int x = 0; \ 830 int x ## _p = 0; \ 831 int x ## _i = 0; \ 832 833 void ArchiveBuilder::make_klasses_shareable() { 834 DECLARE_INSTANCE_KLASS_COUNTER(num_instance_klasses); 835 DECLARE_INSTANCE_KLASS_COUNTER(num_boot_klasses); 836 DECLARE_INSTANCE_KLASS_COUNTER(num_vm_klasses); 837 DECLARE_INSTANCE_KLASS_COUNTER(num_platform_klasses); 838 DECLARE_INSTANCE_KLASS_COUNTER(num_app_klasses); 839 DECLARE_INSTANCE_KLASS_COUNTER(num_hidden_klasses); 840 DECLARE_INSTANCE_KLASS_COUNTER(num_unlinked_klasses); 841 DECLARE_INSTANCE_KLASS_COUNTER(num_unregistered_klasses); 842 int num_obj_array_klasses = 0; 843 int num_type_array_klasses = 0; 844 845 int boot_unlinked = 0; 846 int platform_unlinked = 0; 847 int app_unlinked = 0; 848 int unreg_unlinked = 0; 849 850 for (int i = 0; i < klasses()->length(); i++) { 851 // Some of the code in ConstantPool::remove_unshareable_info() requires the classes 852 // to be in linked state, so it must be call here before the next loop, which returns 853 // all classes to unlinked state. 854 Klass* k = get_buffered_addr(klasses()->at(i)); 855 if (k->is_instance_klass()) { 856 InstanceKlass::cast(k)->constants()->remove_unshareable_info(); 857 } 858 } 859 860 for (int i = 0; i < klasses()->length(); i++) { 861 const char* type; 862 const char* unlinked = ""; 863 const char* hidden = ""; 864 const char* generated = ""; 865 const char* preloaded_msg = ""; 866 const char* inited_msg = ""; 867 Klass* k = get_buffered_addr(klasses()->at(i)); 868 k->remove_java_mirror(); 869 if (k->is_objArray_klass()) { 870 // InstanceKlass and TypeArrayKlass will in turn call remove_unshareable_info 871 // on their array classes. 872 num_obj_array_klasses ++; 873 type = "array"; 874 } else if (k->is_typeArray_klass()) { 875 num_type_array_klasses ++; 876 type = "array"; 877 k->remove_unshareable_info(); 878 } else { 879 assert(k->is_instance_klass(), " must be"); 880 InstanceKlass* ik = InstanceKlass::cast(k); 881 InstanceKlass* src_ik = get_source_addr(ik); 882 int preloaded = ClassPreloader::is_preloaded_class(src_ik); 883 int inited = ik->has_preinitialized_mirror(); 884 ADD_COUNT(num_instance_klasses); 885 if (CDSConfig::is_dumping_dynamic_archive()) { 886 // For static dump, class loader type are already set. 887 ik->assign_class_loader_type(); 888 } 889 if (ik->is_hidden()) { 890 oop loader = k->class_loader(); 891 if (loader == nullptr) { 892 type = "boot"; 893 ADD_COUNT(num_boot_klasses); 894 } else if (loader == SystemDictionary::java_platform_loader()) { 895 type = "plat"; 896 ADD_COUNT(num_platform_klasses); 897 } else if (loader == SystemDictionary::java_system_loader()) { 898 type = "app"; 899 ADD_COUNT(num_app_klasses); 900 } else { 901 type = "bad"; 902 assert(0, "shouldn't happen"); 903 } 904 } else if (ik->is_shared_boot_class()) { 905 type = "boot"; 906 ADD_COUNT(num_boot_klasses); 907 } else if (ik->is_shared_platform_class()) { 908 type = "plat"; 909 ADD_COUNT(num_platform_klasses); 910 } else if (ik->is_shared_app_class()) { 911 type = "app"; 912 ADD_COUNT(num_app_klasses); 913 } else { 914 assert(ik->is_shared_unregistered_class(), "must be"); 915 type = "unreg"; 916 ADD_COUNT(num_unregistered_klasses); 917 } 918 919 if (ClassPreloader::is_vm_class(src_ik)) { 920 ADD_COUNT(num_vm_klasses); 921 } 922 923 if (!ik->is_linked()) { 924 ADD_COUNT(num_unlinked_klasses); 925 unlinked = " unlinked"; 926 if (ik->is_shared_boot_class()) { 927 boot_unlinked ++; 928 } else if (ik->is_shared_platform_class()) { 929 platform_unlinked ++; 930 } else if (ik->is_shared_app_class()) { 931 app_unlinked ++; 932 } else { 933 unreg_unlinked ++; 934 } 935 } 936 937 if (ik->is_hidden()) { 938 ADD_COUNT(num_hidden_klasses); 939 hidden = " hidden"; 940 } 941 942 if (ik->is_generated_shared_class()) { 943 generated = " generated"; 944 } 945 if (preloaded) { 946 preloaded_msg = " preloaded"; 947 } 948 if (inited) { 949 inited_msg = " inited"; 950 } 951 952 MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread::current(), ik); 953 ik->remove_unshareable_info(); 954 } 955 956 if (log_is_enabled(Debug, cds, class)) { 957 ResourceMark rm; 958 log_debug(cds, class)("klasses[%5d] = " PTR_FORMAT " %-5s %s%s%s%s%s%s", i, 959 p2i(to_requested(k)), type, k->external_name(), 960 hidden, unlinked, generated, preloaded_msg, inited_msg); 961 } 962 } 963 964 #define STATS_FORMAT "= %5d, preloaded = %5d, inited = %5d" 965 #define STATS_PARAMS(x) num_ ## x, num_ ## x ## _p, num_ ## x ## _i 966 967 log_info(cds)("Number of classes %d", num_instance_klasses + num_obj_array_klasses + num_type_array_klasses); 968 log_info(cds)(" instance classes " STATS_FORMAT, STATS_PARAMS(instance_klasses)); 969 log_info(cds)(" boot " STATS_FORMAT, STATS_PARAMS(boot_klasses)); 970 log_info(cds)(" vm " STATS_FORMAT, STATS_PARAMS(vm_klasses)); 971 log_info(cds)(" platform " STATS_FORMAT, STATS_PARAMS(platform_klasses)); 972 log_info(cds)(" app " STATS_FORMAT, STATS_PARAMS(app_klasses)); 973 log_info(cds)(" unregistered " STATS_FORMAT, STATS_PARAMS(unregistered_klasses)); 974 log_info(cds)(" (hidden) " STATS_FORMAT, STATS_PARAMS(hidden_klasses)); 975 log_info(cds)(" (unlinked) " STATS_FORMAT ", boot = %d, plat = %d, app = %d, unreg = %d", 976 STATS_PARAMS(unlinked_klasses), 977 boot_unlinked, platform_unlinked, 978 app_unlinked, unreg_unlinked); 979 log_info(cds)(" obj array classes = %5d", num_obj_array_klasses); 980 log_info(cds)(" type array classes = %5d", num_type_array_klasses); 981 log_info(cds)(" symbols = %5d", _symbols->length()); 982 983 #undef STATS_FORMAT 984 #undef STATS_PARAMS 985 986 DynamicArchive::make_array_klasses_shareable(); 987 } 988 989 void ArchiveBuilder::make_training_data_shareable() { 990 auto clean_td = [&] (address& src_obj, SourceObjInfo& info) { 991 if (!is_in_buffer_space(info.buffered_addr())) { 992 return; 993 } 994 995 if (info.msotype() == MetaspaceObj::KlassTrainingDataType || 996 info.msotype() == MetaspaceObj::MethodTrainingDataType || 997 info.msotype() == MetaspaceObj::CompileTrainingDataType) { 998 TrainingData* buffered_td = (TrainingData*)info.buffered_addr(); 999 buffered_td->remove_unshareable_info(); 1000 } else if (info.msotype() == MetaspaceObj::MethodDataType) { 1001 MethodData* buffered_mdo = (MethodData*)info.buffered_addr(); 1002 buffered_mdo->remove_unshareable_info(); 1003 } else if (info.msotype() == MetaspaceObj::MethodCountersType) { 1004 MethodCounters* buffered_mc = (MethodCounters*)info.buffered_addr(); 1005 buffered_mc->remove_unshareable_info(); 1006 } 1007 }; 1008 _src_obj_table.iterate_all(clean_td); 1009 } 1010 1011 void ArchiveBuilder::serialize_dynamic_archivable_items(SerializeClosure* soc) { 1012 SymbolTable::serialize_shared_table_header(soc, false); 1013 SystemDictionaryShared::serialize_dictionary_headers(soc, false); 1014 DynamicArchive::serialize_array_klasses(soc); 1015 ClassPreloader::serialize(soc, false); 1016 FinalImageRecipes::serialize(soc, false); 1017 TrainingData::serialize_training_data(soc); 1018 } 1019 1020 uintx ArchiveBuilder::buffer_to_offset(address p) const { 1021 address requested_p = to_requested(p); 1022 assert(requested_p >= _requested_static_archive_bottom, "must be"); 1023 return requested_p - _requested_static_archive_bottom; 1024 } 1025 1026 uintx ArchiveBuilder::any_to_offset(address p) const { 1027 if (is_in_mapped_static_archive(p)) { 1028 assert(CDSConfig::is_dumping_dynamic_archive(), "must be"); 1029 return p - _mapped_static_archive_bottom; 1030 } 1031 if (!is_in_buffer_space(p)) { 1032 // p must be a "source" address 1033 p = get_buffered_addr(p); 1034 } 1035 return buffer_to_offset(p); 1036 } 1037 1038 void ArchiveBuilder::start_cc_region() { 1039 ro_region()->pack(); 1040 start_dump_region(&_cc_region); 1041 } 1042 1043 void ArchiveBuilder::end_cc_region() { 1044 _cc_region.pack(); 1045 } 1046 1047 #if INCLUDE_CDS_JAVA_HEAP 1048 narrowKlass ArchiveBuilder::get_requested_narrow_klass(Klass* k) { 1049 assert(CDSConfig::is_dumping_heap(), "sanity"); 1050 k = get_buffered_klass(k); 1051 Klass* requested_k = to_requested(k); 1052 address narrow_klass_base = _requested_static_archive_bottom; // runtime encoding base == runtime mapping start 1053 const int narrow_klass_shift = ArchiveHeapWriter::precomputed_narrow_klass_shift; 1054 return CompressedKlassPointers::encode_not_null(requested_k, narrow_klass_base, narrow_klass_shift); 1055 } 1056 #endif // INCLUDE_CDS_JAVA_HEAP 1057 1058 // RelocateBufferToRequested --- Relocate all the pointers in rw/ro, 1059 // so that the archive can be mapped to the "requested" location without runtime relocation. 1060 // 1061 // - See ArchiveBuilder header for the definition of "buffer", "mapped" and "requested" 1062 // - ArchivePtrMarker::ptrmap() marks all the pointers in the rw/ro regions 1063 // - Every pointer must have one of the following values: 1064 // [a] nullptr: 1065 // No relocation is needed. Remove this pointer from ptrmap so we don't need to 1066 // consider it at runtime. 1067 // [b] Points into an object X which is inside the buffer: 1068 // Adjust this pointer by _buffer_to_requested_delta, so it points to X 1069 // when the archive is mapped at the requested location. 1070 // [c] Points into an object Y which is inside mapped static archive: 1071 // - This happens only during dynamic dump 1072 // - Adjust this pointer by _mapped_to_requested_static_archive_delta, 1073 // so it points to Y when the static archive is mapped at the requested location. 1074 template <bool STATIC_DUMP> 1075 class RelocateBufferToRequested : public BitMapClosure { 1076 ArchiveBuilder* _builder; 1077 address _buffer_bottom; 1078 intx _buffer_to_requested_delta; 1079 intx _mapped_to_requested_static_archive_delta; 1080 size_t _max_non_null_offset; 1081 1082 public: 1083 RelocateBufferToRequested(ArchiveBuilder* builder) { 1084 _builder = builder; 1085 _buffer_bottom = _builder->buffer_bottom(); 1086 _buffer_to_requested_delta = builder->buffer_to_requested_delta(); 1087 _mapped_to_requested_static_archive_delta = builder->requested_static_archive_bottom() - builder->mapped_static_archive_bottom(); 1088 _max_non_null_offset = 0; 1089 1090 address bottom = _builder->buffer_bottom(); 1091 address top = _builder->buffer_top(); 1092 address new_bottom = bottom + _buffer_to_requested_delta; 1093 address new_top = top + _buffer_to_requested_delta; 1094 log_debug(cds)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT "] to " 1095 "[" INTPTR_FORMAT " - " INTPTR_FORMAT "]", 1096 p2i(bottom), p2i(top), 1097 p2i(new_bottom), p2i(new_top)); 1098 } 1099 1100 bool do_bit(size_t offset) { 1101 address* p = (address*)_buffer_bottom + offset; 1102 assert(_builder->is_in_buffer_space(p), "pointer must live in buffer space"); 1103 1104 if (*p == nullptr) { 1105 // todo -- clear bit, etc 1106 ArchivePtrMarker::ptrmap()->clear_bit(offset); 1107 } else { 1108 if (STATIC_DUMP) { 1109 assert(_builder->is_in_buffer_space(*p), "old pointer must point inside buffer space"); 1110 *p += _buffer_to_requested_delta; 1111 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive"); 1112 } else { 1113 if (_builder->is_in_buffer_space(*p)) { 1114 *p += _buffer_to_requested_delta; 1115 // assert is in requested dynamic archive 1116 } else { 1117 assert(_builder->is_in_mapped_static_archive(*p), "old pointer must point inside buffer space or mapped static archive"); 1118 *p += _mapped_to_requested_static_archive_delta; 1119 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive"); 1120 } 1121 } 1122 _max_non_null_offset = offset; 1123 } 1124 1125 return true; // keep iterating 1126 } 1127 1128 void doit() { 1129 ArchivePtrMarker::ptrmap()->iterate(this); 1130 ArchivePtrMarker::compact(_max_non_null_offset); 1131 } 1132 }; 1133 1134 1135 void ArchiveBuilder::relocate_to_requested() { 1136 if (!ro_region()->is_packed()) { 1137 ro_region()->pack(); 1138 } 1139 1140 size_t my_archive_size = buffer_top() - buffer_bottom(); 1141 1142 if (CDSConfig::is_dumping_static_archive()) { 1143 _requested_static_archive_top = _requested_static_archive_bottom + my_archive_size; 1144 RelocateBufferToRequested<true> patcher(this); 1145 patcher.doit(); 1146 } else { 1147 assert(CDSConfig::is_dumping_dynamic_archive(), "must be"); 1148 _requested_dynamic_archive_top = _requested_dynamic_archive_bottom + my_archive_size; 1149 RelocateBufferToRequested<false> patcher(this); 1150 patcher.doit(); 1151 } 1152 } 1153 1154 // Write detailed info to a mapfile to analyze contents of the archive. 1155 // static dump: 1156 // java -Xshare:dump -Xlog:cds+map=trace:file=cds.map:none:filesize=0 1157 // dynamic dump: 1158 // java -cp MyApp.jar -XX:ArchiveClassesAtExit=MyApp.jsa \ 1159 // -Xlog:cds+map=trace:file=cds.map:none:filesize=0 MyApp 1160 // 1161 // We need to do some address translation because the buffers used at dump time may be mapped to 1162 // a different location at runtime. At dump time, the buffers may be at arbitrary locations 1163 // picked by the OS. At runtime, we try to map at a fixed location (SharedBaseAddress). For 1164 // consistency, we log everything using runtime addresses. 1165 class ArchiveBuilder::CDSMapLogger : AllStatic { 1166 static intx buffer_to_runtime_delta() { 1167 // Translate the buffers used by the RW/RO regions to their eventual (requested) locations 1168 // at runtime. 1169 return ArchiveBuilder::current()->buffer_to_requested_delta(); 1170 } 1171 1172 // rw/ro regions only 1173 static void log_metaspace_region(const char* name, DumpRegion* region, 1174 const ArchiveBuilder::SourceObjList* src_objs) { 1175 address region_base = address(region->base()); 1176 address region_top = address(region->top()); 1177 log_region(name, region_base, region_top, region_base + buffer_to_runtime_delta()); 1178 log_metaspace_objects(region, src_objs); 1179 } 1180 1181 #define _LOG_PREFIX PTR_FORMAT ": @@ %-17s %d" 1182 1183 static void log_klass(Klass* k, address runtime_dest, const char* type_name, int bytes, Thread* current) { 1184 ResourceMark rm(current); 1185 log_debug(cds, map)(_LOG_PREFIX " %s", 1186 p2i(runtime_dest), type_name, bytes, k->external_name()); 1187 } 1188 static void log_method(Method* m, address runtime_dest, const char* type_name, int bytes, Thread* current) { 1189 ResourceMark rm(current); 1190 log_debug(cds, map)(_LOG_PREFIX " %s", 1191 p2i(runtime_dest), type_name, bytes, m->external_name()); 1192 } 1193 1194 // rw/ro regions only 1195 static void log_metaspace_objects(DumpRegion* region, const ArchiveBuilder::SourceObjList* src_objs) { 1196 address last_obj_base = address(region->base()); 1197 address last_obj_end = address(region->base()); 1198 address region_end = address(region->end()); 1199 Thread* current = Thread::current(); 1200 for (int i = 0; i < src_objs->objs()->length(); i++) { 1201 SourceObjInfo* src_info = src_objs->at(i); 1202 address src = src_info->source_addr(); 1203 address dest = src_info->buffered_addr(); 1204 log_as_hex(last_obj_base, dest, last_obj_base + buffer_to_runtime_delta()); 1205 address runtime_dest = dest + buffer_to_runtime_delta(); 1206 int bytes = src_info->size_in_bytes(); 1207 1208 MetaspaceObj::Type type = src_info->msotype(); 1209 const char* type_name = MetaspaceObj::type_name(type); 1210 1211 switch (type) { 1212 case MetaspaceObj::ClassType: 1213 log_klass((Klass*)src, runtime_dest, type_name, bytes, current); 1214 break; 1215 case MetaspaceObj::ConstantPoolType: 1216 log_klass(((ConstantPool*)src)->pool_holder(), 1217 runtime_dest, type_name, bytes, current); 1218 break; 1219 case MetaspaceObj::ConstantPoolCacheType: 1220 log_klass(((ConstantPoolCache*)src)->constant_pool()->pool_holder(), 1221 runtime_dest, type_name, bytes, current); 1222 break; 1223 case MetaspaceObj::MethodType: 1224 log_method((Method*)src, runtime_dest, type_name, bytes, current); 1225 break; 1226 case MetaspaceObj::ConstMethodType: 1227 log_method(((ConstMethod*)src)->method(), runtime_dest, type_name, bytes, current); 1228 break; 1229 case MetaspaceObj::SymbolType: 1230 { 1231 ResourceMark rm(current); 1232 Symbol* s = (Symbol*)src; 1233 log_debug(cds, map)(_LOG_PREFIX " %s", p2i(runtime_dest), type_name, bytes, 1234 s->as_quoted_ascii()); 1235 } 1236 break; 1237 default: 1238 log_debug(cds, map)(_LOG_PREFIX, p2i(runtime_dest), type_name, bytes); 1239 break; 1240 } 1241 1242 last_obj_base = dest; 1243 last_obj_end = dest + bytes; 1244 } 1245 1246 log_as_hex(last_obj_base, last_obj_end, last_obj_base + buffer_to_runtime_delta()); 1247 if (last_obj_end < region_end) { 1248 log_debug(cds, map)(PTR_FORMAT ": @@ Misc data " SIZE_FORMAT " bytes", 1249 p2i(last_obj_end + buffer_to_runtime_delta()), 1250 size_t(region_end - last_obj_end)); 1251 log_as_hex(last_obj_end, region_end, last_obj_end + buffer_to_runtime_delta()); 1252 } 1253 } 1254 1255 #undef _LOG_PREFIX 1256 1257 // Log information about a region, whose address at dump time is [base .. top). At 1258 // runtime, this region will be mapped to requested_base. requested_base is 0 if this 1259 // region will be mapped at os-selected addresses (such as the bitmap region), or will 1260 // be accessed with os::read (the header). 1261 // 1262 // Note: across -Xshare:dump runs, base may be different, but requested_base should 1263 // be the same as the archive contents should be deterministic. 1264 static void log_region(const char* name, address base, address top, address requested_base) { 1265 size_t size = top - base; 1266 base = requested_base; 1267 top = requested_base + size; 1268 log_info(cds, map)("[%-18s " PTR_FORMAT " - " PTR_FORMAT " " SIZE_FORMAT_W(9) " bytes]", 1269 name, p2i(base), p2i(top), size); 1270 } 1271 1272 #if INCLUDE_CDS_JAVA_HEAP 1273 static void log_heap_region(ArchiveHeapInfo* heap_info) { 1274 MemRegion r = heap_info->buffer_region(); 1275 address start = address(r.start()); // start of the current oop inside the buffer 1276 address end = address(r.end()); 1277 log_region("heap", start, end, ArchiveHeapWriter::buffered_addr_to_requested_addr(start)); 1278 1279 LogStreamHandle(Info, cds, map) st; 1280 1281 while (start < end) { 1282 size_t byte_size; 1283 oop source_oop = ArchiveHeapWriter::buffered_addr_to_source_obj(start); 1284 address requested_start = ArchiveHeapWriter::buffered_addr_to_requested_addr(start); 1285 st.print(PTR_FORMAT ": @@ Object ", p2i(requested_start)); 1286 int permobj_segment = -1; 1287 int permobj_segment_length = -1; 1288 1289 if (source_oop != nullptr) { 1290 // This is a regular oop that got archived. 1291 print_oop_with_requested_addr_cr(&st, source_oop, false); 1292 byte_size = source_oop->size() * BytesPerWord; 1293 } else if (start == ArchiveHeapWriter::buffered_heap_roots_addr()) { 1294 // HeapShared::roots() is copied specially, so it doesn't exist in 1295 // ArchiveHeapWriter::BufferOffsetToSourceObjectTable. 1296 // See ArchiveHeapWriter::copy_roots_to_buffer(). 1297 st.print_cr("HeapShared::roots[%d]", HeapShared::pending_roots()->length()); 1298 byte_size = ArchiveHeapWriter::heap_roots_word_size() * BytesPerWord; 1299 } else if ((byte_size = ArchiveHeapWriter::get_filler_size_at(start)) > 0) { 1300 // We have a filler oop, which also does not exist in BufferOffsetToSourceObjectTable. 1301 st.print_cr("filler " SIZE_FORMAT " bytes", byte_size); 1302 } else if ((permobj_segment = ArchiveHeapWriter::get_permobj_segment_at(start, &byte_size, &permobj_segment_length)) >= 0) { 1303 st.print_cr("permobj_%d[%d] %zu bytes", permobj_segment, permobj_segment_length, byte_size); 1304 } else { 1305 ShouldNotReachHere(); 1306 } 1307 1308 address oop_end = start + byte_size; 1309 log_as_hex(start, oop_end, requested_start, /*is_heap=*/true); 1310 1311 if (source_oop != nullptr) { 1312 log_oop_details(heap_info, source_oop, /*buffered_addr=*/start); 1313 } else if (start == ArchiveHeapWriter::buffered_heap_roots_addr()) { 1314 log_heap_roots(); 1315 } else if (permobj_segment >= 0) { 1316 log_permobj_segment(permobj_segment, permobj_segment_length); 1317 } 1318 start = oop_end; 1319 } 1320 } 1321 1322 // ArchivedFieldPrinter is used to print the fields of archived objects. We can't 1323 // use _source_obj->print_on(), because we want to print the oop fields 1324 // in _source_obj with their requested addresses using print_oop_with_requested_addr_cr(). 1325 class ArchivedFieldPrinter : public FieldClosure { 1326 ArchiveHeapInfo* _heap_info; 1327 outputStream* _st; 1328 oop _source_obj; 1329 address _buffered_addr; 1330 public: 1331 ArchivedFieldPrinter(ArchiveHeapInfo* heap_info, outputStream* st, oop src_obj, address buffered_addr) : 1332 _heap_info(heap_info), _st(st), _source_obj(src_obj), _buffered_addr(buffered_addr) {} 1333 1334 void do_field(fieldDescriptor* fd) { 1335 _st->print(" - "); 1336 BasicType ft = fd->field_type(); 1337 switch (ft) { 1338 case T_ARRAY: 1339 case T_OBJECT: 1340 fd->print_on(_st); // print just the name and offset 1341 print_oop_with_requested_addr_cr(_st, _source_obj->obj_field(fd->offset())); 1342 break; 1343 default: 1344 if (ArchiveHeapWriter::is_marked_as_native_pointer(_heap_info, _source_obj, fd->offset())) { 1345 print_as_native_pointer(fd); 1346 } else { 1347 fd->print_on_for(_st, cast_to_oop(_buffered_addr)); // name, offset, value 1348 _st->cr(); 1349 } 1350 } 1351 } 1352 1353 void print_as_native_pointer(fieldDescriptor* fd) { 1354 LP64_ONLY(assert(fd->field_type() == T_LONG, "must be")); 1355 NOT_LP64 (assert(fd->field_type() == T_INT, "must be")); 1356 1357 // We have a field that looks like an integer, but it's actually a pointer to a MetaspaceObj. 1358 address source_native_ptr = (address) 1359 LP64_ONLY(_source_obj->long_field(fd->offset())) 1360 NOT_LP64( _source_obj->int_field (fd->offset())); 1361 ArchiveBuilder* builder = ArchiveBuilder::current(); 1362 1363 // The value of the native pointer at runtime. 1364 address requested_native_ptr = builder->to_requested(builder->get_buffered_addr(source_native_ptr)); 1365 1366 // The address of _source_obj at runtime 1367 oop requested_obj = ArchiveHeapWriter::source_obj_to_requested_obj(_source_obj); 1368 // The address of this field in the requested space 1369 assert(requested_obj != nullptr, "Attempting to load field from null oop"); 1370 address requested_field_addr = cast_from_oop<address>(requested_obj) + fd->offset(); 1371 1372 fd->print_on(_st); 1373 _st->print_cr(PTR_FORMAT " (marked metadata pointer @" PTR_FORMAT " )", 1374 p2i(requested_native_ptr), p2i(requested_field_addr)); 1375 } 1376 }; 1377 1378 // Print the fields of instanceOops, or the elements of arrayOops 1379 static void log_oop_details(ArchiveHeapInfo* heap_info, oop source_oop, address buffered_addr) { 1380 LogStreamHandle(Trace, cds, map, oops) st; 1381 if (st.is_enabled()) { 1382 Klass* source_klass = source_oop->klass(); 1383 ArchiveBuilder* builder = ArchiveBuilder::current(); 1384 Klass* requested_klass = builder->to_requested(builder->get_buffered_addr(source_klass)); 1385 1386 st.print(" - klass: "); 1387 source_klass->print_value_on(&st); 1388 st.print(" " PTR_FORMAT, p2i(requested_klass)); 1389 st.cr(); 1390 1391 if (source_oop->is_typeArray()) { 1392 TypeArrayKlass::cast(source_klass)->oop_print_elements_on(typeArrayOop(source_oop), &st); 1393 } else if (source_oop->is_objArray()) { 1394 objArrayOop source_obj_array = objArrayOop(source_oop); 1395 for (int i = 0; i < source_obj_array->length(); i++) { 1396 st.print(" -%4d: ", i); 1397 print_oop_with_requested_addr_cr(&st, source_obj_array->obj_at(i)); 1398 } 1399 } else { 1400 st.print_cr(" - fields (" SIZE_FORMAT " words):", source_oop->size()); 1401 ArchivedFieldPrinter print_field(heap_info, &st, source_oop, buffered_addr); 1402 InstanceKlass::cast(source_klass)->print_nonstatic_fields(&print_field); 1403 1404 if (java_lang_Class::is_instance(source_oop)) { 1405 st.print(" - signature: "); 1406 if (java_lang_Class::is_primitive(source_oop)) { 1407 st.print("primitive ??"); 1408 } else { 1409 java_lang_Class::print_signature(source_oop, &st); 1410 } 1411 st.cr(); 1412 } 1413 } 1414 } 1415 } 1416 1417 static void log_heap_roots() { 1418 LogStreamHandle(Trace, cds, map, oops) st; 1419 if (st.is_enabled()) { 1420 for (int i = 0; i < HeapShared::pending_roots()->length(); i++) { 1421 st.print("roots[%4d]: ", i); 1422 print_oop_with_requested_addr_cr(&st, HeapShared::pending_roots()->at(i)); 1423 } 1424 } 1425 } 1426 1427 static void log_permobj_segment(int permobj_segment, int permobj_segment_length) { 1428 LogStreamHandle(Trace, cds, map, oops) st; 1429 if (st.is_enabled()) { 1430 for (int i = 0; i < permobj_segment_length; i++) { 1431 st.print("permobj_%d[%4d]: ", permobj_segment, i); 1432 print_oop_with_requested_addr_cr(&st, ArchiveHeapWriter::get_permobj_source_addr(permobj_segment, i)); 1433 } 1434 } 1435 } 1436 1437 1438 // The output looks like this. The first number is the requested address. The second number is 1439 // the narrowOop version of the requested address. 1440 // 0x00000007ffc7e840 (0xfff8fd08) java.lang.Class 1441 // 0x00000007ffc000f8 (0xfff8001f) [B length: 11 1442 static void print_oop_with_requested_addr_cr(outputStream* st, oop source_oop, bool print_addr = true) { 1443 if (source_oop == nullptr) { 1444 st->print_cr("null"); 1445 } else { 1446 ResourceMark rm; 1447 oop requested_obj = ArchiveHeapWriter::source_obj_to_requested_obj(source_oop); 1448 if (print_addr) { 1449 st->print(PTR_FORMAT " ", p2i(requested_obj)); 1450 } 1451 if (UseCompressedOops) { 1452 st->print("(0x%08x) ", CompressedOops::narrow_oop_value(requested_obj)); 1453 } 1454 if (source_oop->is_array()) { 1455 int array_len = arrayOop(source_oop)->length(); 1456 st->print_cr("%s length: %d", source_oop->klass()->external_name(), array_len); 1457 } else { 1458 st->print("%s", source_oop->klass()->external_name()); 1459 if (java_lang_invoke_MethodType::is_instance(source_oop)) { 1460 st->print(" "); 1461 java_lang_invoke_MethodType::print_signature(source_oop, st); 1462 } 1463 st->cr(); 1464 } 1465 } 1466 } 1467 #endif // INCLUDE_CDS_JAVA_HEAP 1468 1469 // Log all the data [base...top). Pretend that the base address 1470 // will be mapped to requested_base at run-time. 1471 static void log_as_hex(address base, address top, address requested_base, bool is_heap = false) { 1472 assert(top >= base, "must be"); 1473 1474 LogStreamHandle(Trace, cds, map) lsh; 1475 if (lsh.is_enabled()) { 1476 int unitsize = sizeof(address); 1477 if (is_heap && UseCompressedOops) { 1478 // This makes the compressed oop pointers easier to read, but 1479 // longs and doubles will be split into two words. 1480 unitsize = sizeof(narrowOop); 1481 } 1482 os::print_hex_dump(&lsh, base, top, unitsize, /* print_ascii=*/true, /* bytes_per_line=*/32, requested_base); 1483 } 1484 } 1485 1486 static void log_header(FileMapInfo* mapinfo) { 1487 LogStreamHandle(Info, cds, map) lsh; 1488 if (lsh.is_enabled()) { 1489 mapinfo->print(&lsh); 1490 } 1491 } 1492 1493 public: 1494 static void log(ArchiveBuilder* builder, FileMapInfo* mapinfo, 1495 ArchiveHeapInfo* heap_info, 1496 char* bitmap, size_t bitmap_size_in_bytes) { 1497 log_info(cds, map)("%s CDS archive map for %s", CDSConfig::is_dumping_static_archive() ? "Static" : "Dynamic", mapinfo->full_path()); 1498 1499 address header = address(mapinfo->header()); 1500 address header_end = header + mapinfo->header()->header_size(); 1501 log_region("header", header, header_end, nullptr); 1502 log_header(mapinfo); 1503 log_as_hex(header, header_end, nullptr); 1504 1505 DumpRegion* rw_region = &builder->_rw_region; 1506 DumpRegion* ro_region = &builder->_ro_region; 1507 1508 log_metaspace_region("rw region", rw_region, &builder->_rw_src_objs); 1509 log_metaspace_region("ro region", ro_region, &builder->_ro_src_objs); 1510 1511 address bitmap_end = address(bitmap + bitmap_size_in_bytes); 1512 log_region("bitmap", address(bitmap), bitmap_end, nullptr); 1513 log_as_hex((address)bitmap, bitmap_end, nullptr); 1514 1515 #if INCLUDE_CDS_JAVA_HEAP 1516 if (heap_info->is_used()) { 1517 log_heap_region(heap_info); 1518 } 1519 #endif 1520 1521 log_info(cds, map)("[End of CDS archive map]"); 1522 } 1523 }; // end ArchiveBuilder::CDSMapLogger 1524 1525 void ArchiveBuilder::print_stats() { 1526 _alloc_stats.print_stats(int(_ro_region.used()), int(_rw_region.used())); 1527 } 1528 1529 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo, ArchiveHeapInfo* heap_info) { 1530 // Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with 1531 // MetaspaceShared::n_regions (internal to hotspot). 1532 assert(NUM_CDS_REGIONS == MetaspaceShared::n_regions, "sanity"); 1533 1534 write_region(mapinfo, MetaspaceShared::rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false); 1535 write_region(mapinfo, MetaspaceShared::ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false); 1536 write_region(mapinfo, MetaspaceShared::cc, &_cc_region, /*read_only=*/false,/*allow_exec=*/true); 1537 1538 // Split pointer map into read-write and read-only bitmaps 1539 ArchivePtrMarker::initialize_rw_ro_cc_maps(&_rw_ptrmap, &_ro_ptrmap, &_cc_ptrmap); 1540 1541 size_t bitmap_size_in_bytes; 1542 char* bitmap = mapinfo->write_bitmap_region(ArchivePtrMarker::rw_ptrmap(), 1543 ArchivePtrMarker::ro_ptrmap(), 1544 ArchivePtrMarker::cc_ptrmap(), 1545 heap_info, 1546 bitmap_size_in_bytes); 1547 1548 if (heap_info->is_used()) { 1549 _total_heap_region_size = mapinfo->write_heap_region(heap_info); 1550 } 1551 1552 print_region_stats(mapinfo, heap_info); 1553 1554 mapinfo->set_requested_base((char*)MetaspaceShared::requested_base_address()); 1555 mapinfo->set_header_crc(mapinfo->compute_header_crc()); 1556 // After this point, we should not write any data into mapinfo->header() since this 1557 // would corrupt its checksum we have calculated before. 1558 mapinfo->write_header(); 1559 mapinfo->close(); 1560 1561 if (log_is_enabled(Info, cds)) { 1562 print_stats(); 1563 } 1564 1565 if (log_is_enabled(Info, cds, map)) { 1566 CDSMapLogger::log(this, mapinfo, heap_info, 1567 bitmap, bitmap_size_in_bytes); 1568 } 1569 CDS_JAVA_HEAP_ONLY(HeapShared::destroy_archived_object_cache()); 1570 FREE_C_HEAP_ARRAY(char, bitmap); 1571 } 1572 1573 void ArchiveBuilder::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) { 1574 mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec); 1575 } 1576 1577 void ArchiveBuilder::print_region_stats(FileMapInfo *mapinfo, ArchiveHeapInfo* heap_info) { 1578 // Print statistics of all the regions 1579 const size_t bitmap_used = mapinfo->region_at(MetaspaceShared::bm)->used(); 1580 const size_t bitmap_reserved = mapinfo->region_at(MetaspaceShared::bm)->used_aligned(); 1581 const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() + 1582 bitmap_reserved + 1583 _total_heap_region_size; 1584 const size_t total_bytes = _ro_region.used() + _rw_region.used() + 1585 bitmap_used + 1586 _total_heap_region_size; 1587 const double total_u_perc = percent_of(total_bytes, total_reserved); 1588 1589 _rw_region.print(total_reserved); 1590 _ro_region.print(total_reserved); 1591 _cc_region.print(total_reserved); 1592 1593 print_bitmap_region_stats(bitmap_used, total_reserved); 1594 1595 if (heap_info->is_used()) { 1596 print_heap_region_stats(heap_info, total_reserved); 1597 } 1598 1599 log_debug(cds)("total : " SIZE_FORMAT_W(9) " [100.0%% of total] out of " SIZE_FORMAT_W(9) " bytes [%5.1f%% used]", 1600 total_bytes, total_reserved, total_u_perc); 1601 } 1602 1603 void ArchiveBuilder::print_bitmap_region_stats(size_t size, size_t total_size) { 1604 log_debug(cds)("bm space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used]", 1605 size, size/double(total_size)*100.0, size); 1606 } 1607 1608 void ArchiveBuilder::print_heap_region_stats(ArchiveHeapInfo *info, size_t total_size) { 1609 char* start = info->buffer_start(); 1610 size_t size = info->buffer_byte_size(); 1611 char* top = start + size; 1612 log_debug(cds)("hp space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used] at " INTPTR_FORMAT, 1613 size, size/double(total_size)*100.0, size, p2i(start)); 1614 } 1615 1616 void ArchiveBuilder::report_out_of_space(const char* name, size_t needed_bytes) { 1617 // This is highly unlikely to happen on 64-bits because we have reserved a 4GB space. 1618 // On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes 1619 // or so. 1620 _rw_region.print_out_of_space_msg(name, needed_bytes); 1621 _ro_region.print_out_of_space_msg(name, needed_bytes); 1622 1623 log_error(cds)("Unable to allocate from '%s' region: Please reduce the number of shared classes.", name); 1624 MetaspaceShared::unrecoverable_writing_error(); 1625 } --- EOF ---