1 /* 2 * Copyright (c) 2020, 2025, 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 "cds/aotArtifactFinder.hpp" 26 #include "cds/aotClassLinker.hpp" 27 #include "cds/aotLinkedClassBulkLoader.hpp" 28 #include "cds/aotLogging.hpp" 29 #include "cds/archiveBuilder.hpp" 30 #include "cds/archiveHeapWriter.hpp" 31 #include "cds/archiveUtils.hpp" 32 #include "cds/cdsConfig.hpp" 33 #include "cds/cppVtables.hpp" 34 #include "cds/dumpAllocStats.hpp" 35 #include "cds/dynamicArchive.hpp" 36 #include "cds/heapShared.hpp" 37 #include "cds/metaspaceShared.hpp" 38 #include "cds/regeneratedClasses.hpp" 39 #include "classfile/classLoader.hpp" 40 #include "classfile/classLoaderDataShared.hpp" 41 #include "classfile/javaClasses.hpp" 42 #include "classfile/symbolTable.hpp" 43 #include "classfile/systemDictionaryShared.hpp" 44 #include "classfile/vmClasses.hpp" 45 #include "code/aotCodeCache.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/memoryReserver.hpp" 52 #include "memory/memRegion.hpp" 53 #include "memory/resourceArea.hpp" 54 #include "oops/compressedKlass.inline.hpp" 55 #include "oops/instanceKlass.hpp" 56 #include "oops/methodCounters.hpp" 57 #include "oops/methodData.hpp" 58 #include "oops/objArrayKlass.hpp" 59 #include "oops/objArrayOop.inline.hpp" 60 #include "oops/oopHandle.inline.hpp" 61 #include "oops/trainingData.hpp" 62 #include "runtime/arguments.hpp" 63 #include "runtime/fieldDescriptor.inline.hpp" 64 #include "runtime/globals_extension.hpp" 65 #include "runtime/javaThread.hpp" 66 #include "runtime/sharedRuntime.hpp" 67 #include "utilities/align.hpp" 68 #include "utilities/bitMap.inline.hpp" 69 #include "utilities/formatBuffer.hpp" 70 71 ArchiveBuilder* ArchiveBuilder::_current = nullptr; 72 73 ArchiveBuilder::OtherROAllocMark::~OtherROAllocMark() { 74 char* newtop = ArchiveBuilder::current()->_ro_region.top(); 75 ArchiveBuilder::alloc_stats()->record_other_type(int(newtop - _oldtop), true); 76 } 77 78 ArchiveBuilder::SourceObjList::SourceObjList() : _ptrmap(16 * K, mtClassShared) { 79 _total_bytes = 0; 80 _objs = new (mtClassShared) GrowableArray<SourceObjInfo*>(128 * K, mtClassShared); 81 } 82 83 ArchiveBuilder::SourceObjList::~SourceObjList() { 84 delete _objs; 85 } 86 87 void ArchiveBuilder::SourceObjList::append(SourceObjInfo* src_info) { 88 // Save this source object for copying 89 src_info->set_id(_objs->length()); 90 _objs->append(src_info); 91 92 // Prepare for marking the pointers in this source object 93 assert(is_aligned(_total_bytes, sizeof(address)), "must be"); 94 src_info->set_ptrmap_start(_total_bytes / sizeof(address)); 95 _total_bytes = align_up(_total_bytes + (uintx)src_info->size_in_bytes(), sizeof(address)); 96 src_info->set_ptrmap_end(_total_bytes / sizeof(address)); 97 98 BitMap::idx_t bitmap_size_needed = BitMap::idx_t(src_info->ptrmap_end()); 99 if (_ptrmap.size() <= bitmap_size_needed) { 100 _ptrmap.resize((bitmap_size_needed + 1) * 2); 101 } 102 } 103 104 void ArchiveBuilder::SourceObjList::remember_embedded_pointer(SourceObjInfo* src_info, MetaspaceClosure::Ref* ref) { 105 // src_obj contains a pointer. Remember the location of this pointer in _ptrmap, 106 // so that we can copy/relocate it later. 107 src_info->set_has_embedded_pointer(); 108 address src_obj = src_info->source_addr(); 109 address* field_addr = ref->addr(); 110 assert(src_info->ptrmap_start() < _total_bytes, "sanity"); 111 assert(src_info->ptrmap_end() <= _total_bytes, "sanity"); 112 assert(*field_addr != nullptr, "should have checked"); 113 114 intx field_offset_in_bytes = ((address)field_addr) - src_obj; 115 DEBUG_ONLY(int src_obj_size = src_info->size_in_bytes();) 116 assert(field_offset_in_bytes >= 0, "must be"); 117 assert(field_offset_in_bytes + intx(sizeof(intptr_t)) <= intx(src_obj_size), "must be"); 118 assert(is_aligned(field_offset_in_bytes, sizeof(address)), "must be"); 119 120 BitMap::idx_t idx = BitMap::idx_t(src_info->ptrmap_start() + (uintx)(field_offset_in_bytes / sizeof(address))); 121 _ptrmap.set_bit(BitMap::idx_t(idx)); 122 } 123 124 class RelocateEmbeddedPointers : public BitMapClosure { 125 ArchiveBuilder* _builder; 126 address _buffered_obj; 127 BitMap::idx_t _start_idx; 128 public: 129 RelocateEmbeddedPointers(ArchiveBuilder* builder, address buffered_obj, BitMap::idx_t start_idx) : 130 _builder(builder), _buffered_obj(buffered_obj), _start_idx(start_idx) {} 131 132 bool do_bit(BitMap::idx_t bit_offset) { 133 size_t field_offset = size_t(bit_offset - _start_idx) * sizeof(address); 134 address* ptr_loc = (address*)(_buffered_obj + field_offset); 135 136 address old_p_with_tags = *ptr_loc; 137 assert(old_p_with_tags != nullptr, "null ptrs shouldn't have been marked"); 138 139 address old_p = MetaspaceClosure::strip_tags(old_p_with_tags); 140 uintx tags = MetaspaceClosure::decode_tags(old_p_with_tags); 141 address new_p = _builder->get_buffered_addr(old_p); 142 143 bool nulled; 144 if (new_p == nullptr) { 145 // old_p had a FollowMode of set_to_null 146 nulled = true; 147 } else { 148 new_p = MetaspaceClosure::add_tags(new_p, tags); 149 nulled = false; 150 } 151 152 log_trace(aot)("Ref: [" PTR_FORMAT "] -> " PTR_FORMAT " => " PTR_FORMAT " %zu", 153 p2i(ptr_loc), p2i(old_p) + tags, p2i(new_p), tags); 154 155 ArchivePtrMarker::set_and_mark_pointer(ptr_loc, new_p); 156 ArchiveBuilder::current()->count_relocated_pointer(tags != 0, nulled); 157 return true; // keep iterating the bitmap 158 } 159 }; 160 161 void ArchiveBuilder::SourceObjList::relocate(int i, ArchiveBuilder* builder) { 162 SourceObjInfo* src_info = objs()->at(i); 163 assert(src_info->should_copy(), "must be"); 164 BitMap::idx_t start = BitMap::idx_t(src_info->ptrmap_start()); // inclusive 165 BitMap::idx_t end = BitMap::idx_t(src_info->ptrmap_end()); // exclusive 166 167 RelocateEmbeddedPointers relocator(builder, src_info->buffered_addr(), start); 168 _ptrmap.iterate(&relocator, start, end); 169 } 170 171 ArchiveBuilder::ArchiveBuilder() : 172 _current_dump_region(nullptr), 173 _buffer_bottom(nullptr), 174 _requested_static_archive_bottom(nullptr), 175 _requested_static_archive_top(nullptr), 176 _requested_dynamic_archive_bottom(nullptr), 177 _requested_dynamic_archive_top(nullptr), 178 _mapped_static_archive_bottom(nullptr), 179 _mapped_static_archive_top(nullptr), 180 _buffer_to_requested_delta(0), 181 _pz_region("pz", MAX_SHARED_DELTA), // protection zone -- used only during dumping; does NOT exist in cds archive. 182 _rw_region("rw", MAX_SHARED_DELTA), 183 _ro_region("ro", MAX_SHARED_DELTA), 184 _ac_region("ac", MAX_SHARED_DELTA), 185 _ptrmap(mtClassShared), 186 _rw_ptrmap(mtClassShared), 187 _ro_ptrmap(mtClassShared), 188 _rw_src_objs(), 189 _ro_src_objs(), 190 _src_obj_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE), 191 _buffered_to_src_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE), 192 _total_heap_region_size(0) 193 { 194 _klasses = new (mtClassShared) GrowableArray<Klass*>(4 * K, mtClassShared); 195 _symbols = new (mtClassShared) GrowableArray<Symbol*>(256 * K, mtClassShared); 196 _entropy_seed = 0x12345678; 197 _relocated_ptr_info._num_ptrs = 0; 198 _relocated_ptr_info._num_tagged_ptrs = 0; 199 _relocated_ptr_info._num_nulled_ptrs = 0; 200 assert(_current == nullptr, "must be"); 201 _current = this; 202 } 203 204 ArchiveBuilder::~ArchiveBuilder() { 205 assert(_current == this, "must be"); 206 _current = nullptr; 207 208 for (int i = 0; i < _symbols->length(); i++) { 209 _symbols->at(i)->decrement_refcount(); 210 } 211 212 delete _klasses; 213 delete _symbols; 214 if (_shared_rs.is_reserved()) { 215 MemoryReserver::release(_shared_rs); 216 } 217 218 AOTArtifactFinder::dispose(); 219 } 220 221 // Returns a deterministic sequence of pseudo random numbers. The main purpose is NOT 222 // for randomness but to get good entropy for the identity_hash() of archived Symbols, 223 // while keeping the contents of static CDS archives deterministic to ensure 224 // reproducibility of JDK builds. 225 int ArchiveBuilder::entropy() { 226 assert(SafepointSynchronize::is_at_safepoint(), "needed to ensure deterministic sequence"); 227 _entropy_seed = os::next_random(_entropy_seed); 228 return static_cast<int>(_entropy_seed); 229 } 230 231 class GatherKlassesAndSymbols : public UniqueMetaspaceClosure { 232 ArchiveBuilder* _builder; 233 234 public: 235 GatherKlassesAndSymbols(ArchiveBuilder* builder) : _builder(builder) {} 236 237 virtual bool do_unique_ref(Ref* ref, bool read_only) { 238 return _builder->gather_klass_and_symbol(ref, read_only); 239 } 240 }; 241 242 bool ArchiveBuilder::gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only) { 243 if (ref->obj() == nullptr) { 244 return false; 245 } 246 if (get_follow_mode(ref) != make_a_copy) { 247 return false; 248 } 249 if (ref->msotype() == MetaspaceObj::ClassType) { 250 Klass* klass = (Klass*)ref->obj(); 251 assert(klass->is_klass(), "must be"); 252 if (!is_excluded(klass)) { 253 _klasses->append(klass); 254 if (klass->is_hidden()) { 255 assert(klass->is_instance_klass(), "must be"); 256 } 257 } 258 } else if (ref->msotype() == MetaspaceObj::SymbolType) { 259 // Make sure the symbol won't be GC'ed while we are dumping the archive. 260 Symbol* sym = (Symbol*)ref->obj(); 261 sym->increment_refcount(); 262 _symbols->append(sym); 263 } 264 265 return true; // recurse 266 } 267 268 void ArchiveBuilder::gather_klasses_and_symbols() { 269 ResourceMark rm; 270 271 AOTArtifactFinder::initialize(); 272 AOTArtifactFinder::find_artifacts(); 273 274 aot_log_info(aot)("Gathering classes and symbols ... "); 275 GatherKlassesAndSymbols doit(this); 276 iterate_roots(&doit); 277 #if INCLUDE_CDS_JAVA_HEAP 278 if (CDSConfig::is_dumping_full_module_graph()) { 279 ClassLoaderDataShared::iterate_symbols(&doit); 280 } 281 #endif 282 doit.finish(); 283 284 if (CDSConfig::is_dumping_static_archive()) { 285 // To ensure deterministic contents in the static archive, we need to ensure that 286 // we iterate the MetaspaceObjs in a deterministic order. It doesn't matter where 287 // the MetaspaceObjs are located originally, as they are copied sequentially into 288 // the archive during the iteration. 289 // 290 // The only issue here is that the symbol table and the system directories may be 291 // randomly ordered, so we copy the symbols and klasses into two arrays and sort 292 // them deterministically. 293 // 294 // During -Xshare:dump, the order of Symbol creation is strictly determined by 295 // the SharedClassListFile (class loading is done in a single thread and the JIT 296 // is disabled). Also, Symbols are allocated in monotonically increasing addresses 297 // (see Symbol::operator new(size_t, int)). So if we iterate the Symbols by 298 // ascending address order, we ensure that all Symbols are copied into deterministic 299 // locations in the archive. 300 // 301 // TODO: in the future, if we want to produce deterministic contents in the 302 // dynamic archive, we might need to sort the symbols alphabetically (also see 303 // DynamicArchiveBuilder::sort_methods()). 304 aot_log_info(aot)("Sorting symbols ... "); 305 _symbols->sort(compare_symbols_by_address); 306 sort_klasses(); 307 } 308 309 AOTClassLinker::add_candidates(); 310 } 311 312 int ArchiveBuilder::compare_symbols_by_address(Symbol** a, Symbol** b) { 313 if (a[0] < b[0]) { 314 return -1; 315 } else { 316 assert(a[0] > b[0], "Duplicated symbol %s unexpected", (*a)->as_C_string()); 317 return 1; 318 } 319 } 320 321 int ArchiveBuilder::compare_klass_by_name(Klass** a, Klass** b) { 322 return a[0]->name()->fast_compare(b[0]->name()); 323 } 324 325 void ArchiveBuilder::sort_klasses() { 326 aot_log_info(aot)("Sorting classes ... "); 327 _klasses->sort(compare_klass_by_name); 328 } 329 330 address ArchiveBuilder::reserve_buffer() { 331 // AOTCodeCache::max_aot_code_size() accounts for aot code region. 332 size_t buffer_size = LP64_ONLY(CompressedClassSpaceSize) NOT_LP64(256 * M) + AOTCodeCache::max_aot_code_size(); 333 ReservedSpace rs = MemoryReserver::reserve(buffer_size, 334 MetaspaceShared::core_region_alignment(), 335 os::vm_page_size(), 336 mtNone); 337 if (!rs.is_reserved()) { 338 aot_log_error(aot)("Failed to reserve %zu bytes of output buffer.", buffer_size); 339 MetaspaceShared::unrecoverable_writing_error(); 340 } 341 342 // buffer_bottom is the lowest address of the 2 core regions (rw, ro) when 343 // we are copying the class metadata into the buffer. 344 address buffer_bottom = (address)rs.base(); 345 aot_log_info(aot)("Reserved output buffer space at " PTR_FORMAT " [%zu bytes]", 346 p2i(buffer_bottom), buffer_size); 347 _shared_rs = rs; 348 349 _buffer_bottom = buffer_bottom; 350 351 if (CDSConfig::is_dumping_static_archive()) { 352 _current_dump_region = &_pz_region; 353 } else { 354 _current_dump_region = &_rw_region; 355 } 356 _current_dump_region->init(&_shared_rs, &_shared_vs); 357 358 ArchivePtrMarker::initialize(&_ptrmap, &_shared_vs); 359 360 // The bottom of the static archive should be mapped at this address by default. 361 _requested_static_archive_bottom = (address)MetaspaceShared::requested_base_address(); 362 363 // The bottom of the archive (that I am writing now) should be mapped at this address by default. 364 address my_archive_requested_bottom; 365 366 if (CDSConfig::is_dumping_static_archive()) { 367 my_archive_requested_bottom = _requested_static_archive_bottom; 368 } else { 369 _mapped_static_archive_bottom = (address)MetaspaceObj::shared_metaspace_base(); 370 _mapped_static_archive_top = (address)MetaspaceObj::shared_metaspace_top(); 371 assert(_mapped_static_archive_top >= _mapped_static_archive_bottom, "must be"); 372 size_t static_archive_size = _mapped_static_archive_top - _mapped_static_archive_bottom; 373 374 // At run time, we will mmap the dynamic archive at my_archive_requested_bottom 375 _requested_static_archive_top = _requested_static_archive_bottom + static_archive_size; 376 my_archive_requested_bottom = align_up(_requested_static_archive_top, MetaspaceShared::core_region_alignment()); 377 378 _requested_dynamic_archive_bottom = my_archive_requested_bottom; 379 } 380 381 _buffer_to_requested_delta = my_archive_requested_bottom - _buffer_bottom; 382 383 address my_archive_requested_top = my_archive_requested_bottom + buffer_size; 384 if (my_archive_requested_bottom < _requested_static_archive_bottom || 385 my_archive_requested_top <= _requested_static_archive_bottom) { 386 // Size overflow. 387 aot_log_error(aot)("my_archive_requested_bottom = " INTPTR_FORMAT, p2i(my_archive_requested_bottom)); 388 aot_log_error(aot)("my_archive_requested_top = " INTPTR_FORMAT, p2i(my_archive_requested_top)); 389 aot_log_error(aot)("SharedBaseAddress (" INTPTR_FORMAT ") is too high. " 390 "Please rerun java -Xshare:dump with a lower value", p2i(_requested_static_archive_bottom)); 391 MetaspaceShared::unrecoverable_writing_error(); 392 } 393 394 if (CDSConfig::is_dumping_static_archive()) { 395 // We don't want any valid object to be at the very bottom of the archive. 396 // See ArchivePtrMarker::mark_pointer(). 397 _pz_region.allocate(MetaspaceShared::protection_zone_size()); 398 start_dump_region(&_rw_region); 399 } 400 401 return buffer_bottom; 402 } 403 404 void ArchiveBuilder::iterate_sorted_roots(MetaspaceClosure* it) { 405 int num_symbols = _symbols->length(); 406 for (int i = 0; i < num_symbols; i++) { 407 it->push(_symbols->adr_at(i)); 408 } 409 410 int num_klasses = _klasses->length(); 411 for (int i = 0; i < num_klasses; i++) { 412 it->push(_klasses->adr_at(i)); 413 } 414 415 iterate_roots(it); 416 } 417 418 class GatherSortedSourceObjs : public MetaspaceClosure { 419 ArchiveBuilder* _builder; 420 421 public: 422 GatherSortedSourceObjs(ArchiveBuilder* builder) : _builder(builder) {} 423 424 virtual bool do_ref(Ref* ref, bool read_only) { 425 return _builder->gather_one_source_obj(ref, read_only); 426 } 427 }; 428 429 bool ArchiveBuilder::gather_one_source_obj(MetaspaceClosure::Ref* ref, bool read_only) { 430 address src_obj = ref->obj(); 431 if (src_obj == nullptr) { 432 return false; 433 } 434 435 remember_embedded_pointer_in_enclosing_obj(ref); 436 if (RegeneratedClasses::has_been_regenerated(src_obj)) { 437 // No need to copy it. We will later relocate it to point to the regenerated klass/method. 438 return false; 439 } 440 441 FollowMode follow_mode = get_follow_mode(ref); 442 SourceObjInfo src_info(ref, read_only, follow_mode); 443 bool created; 444 SourceObjInfo* p = _src_obj_table.put_if_absent(src_obj, src_info, &created); 445 if (created) { 446 if (_src_obj_table.maybe_grow()) { 447 log_info(aot, hashtables)("Expanded _src_obj_table table to %d", _src_obj_table.table_size()); 448 } 449 } 450 451 #ifdef ASSERT 452 if (ref->msotype() == MetaspaceObj::MethodType) { 453 Method* m = (Method*)ref->obj(); 454 assert(!RegeneratedClasses::has_been_regenerated((address)m->method_holder()), 455 "Should not archive methods in a class that has been regenerated"); 456 } 457 #endif 458 459 if (ref->msotype() == MetaspaceObj::MethodDataType) { 460 MethodData* md = (MethodData*)ref->obj(); 461 md->clean_method_data(false /* always_clean */); 462 } 463 464 assert(p->read_only() == src_info.read_only(), "must be"); 465 466 if (created && src_info.should_copy()) { 467 if (read_only) { 468 _ro_src_objs.append(p); 469 } else { 470 _rw_src_objs.append(p); 471 } 472 return true; // Need to recurse into this ref only if we are copying it 473 } else { 474 return false; 475 } 476 } 477 478 void ArchiveBuilder::record_regenerated_object(address orig_src_obj, address regen_src_obj) { 479 // Record the fact that orig_src_obj has been replaced by regen_src_obj. All calls to get_buffered_addr(orig_src_obj) 480 // should return the same value as get_buffered_addr(regen_src_obj). 481 SourceObjInfo* p = _src_obj_table.get(regen_src_obj); 482 assert(p != nullptr, "regenerated object should always be dumped"); 483 SourceObjInfo orig_src_info(orig_src_obj, p); 484 bool created; 485 _src_obj_table.put_if_absent(orig_src_obj, orig_src_info, &created); 486 assert(created, "We shouldn't have archived the original copy of a regenerated object"); 487 } 488 489 // Remember that we have a pointer inside ref->enclosing_obj() that points to ref->obj() 490 void ArchiveBuilder::remember_embedded_pointer_in_enclosing_obj(MetaspaceClosure::Ref* ref) { 491 assert(ref->obj() != nullptr, "should have checked"); 492 493 address enclosing_obj = ref->enclosing_obj(); 494 if (enclosing_obj == nullptr) { 495 return; 496 } 497 498 // We are dealing with 3 addresses: 499 // address o = ref->obj(): We have found an object whose address is o. 500 // address* mpp = ref->mpp(): The object o is pointed to by a pointer whose address is mpp. 501 // I.e., (*mpp == o) 502 // enclosing_obj : If non-null, it is the object which has a field that points to o. 503 // mpp is the address if that field. 504 // 505 // Example: We have an array whose first element points to a Method: 506 // Method* o = 0x0000abcd; 507 // Array<Method*>* enclosing_obj = 0x00001000; 508 // enclosing_obj->at_put(0, o); 509 // 510 // We the MetaspaceClosure iterates on the very first element of this array, we have 511 // ref->obj() == 0x0000abcd (the Method) 512 // ref->mpp() == 0x00001008 (the location of the first element in the array) 513 // ref->enclosing_obj() == 0x00001000 (the Array that contains the Method) 514 // 515 // We use the above information to mark the bitmap to indicate that there's a pointer on address 0x00001008. 516 SourceObjInfo* src_info = _src_obj_table.get(enclosing_obj); 517 if (src_info == nullptr || !src_info->should_copy()) { 518 // source objects of point_to_it/set_to_null types are not copied 519 // so we don't need to remember their pointers. 520 } else { 521 if (src_info->read_only()) { 522 _ro_src_objs.remember_embedded_pointer(src_info, ref); 523 } else { 524 _rw_src_objs.remember_embedded_pointer(src_info, ref); 525 } 526 } 527 } 528 529 void ArchiveBuilder::gather_source_objs() { 530 ResourceMark rm; 531 aot_log_info(aot)("Gathering all archivable objects ... "); 532 gather_klasses_and_symbols(); 533 GatherSortedSourceObjs doit(this); 534 iterate_sorted_roots(&doit); 535 doit.finish(); 536 } 537 538 bool ArchiveBuilder::is_excluded(Klass* klass) { 539 if (klass->is_instance_klass()) { 540 InstanceKlass* ik = InstanceKlass::cast(klass); 541 return SystemDictionaryShared::is_excluded_class(ik); 542 } else if (klass->is_objArray_klass()) { 543 Klass* bottom = ObjArrayKlass::cast(klass)->bottom_klass(); 544 if (CDSConfig::is_dumping_dynamic_archive() && MetaspaceShared::is_shared_static(bottom)) { 545 // The bottom class is in the static archive so it's clearly not excluded. 546 return false; 547 } else if (bottom->is_instance_klass()) { 548 return SystemDictionaryShared::is_excluded_class(InstanceKlass::cast(bottom)); 549 } 550 } 551 552 return false; 553 } 554 555 ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref *ref) { 556 address obj = ref->obj(); 557 if (CDSConfig::is_dumping_dynamic_archive() && MetaspaceShared::is_in_shared_metaspace(obj)) { 558 // Don't dump existing shared metadata again. 559 return point_to_it; 560 } else if (ref->msotype() == MetaspaceObj::MethodDataType || 561 ref->msotype() == MetaspaceObj::MethodCountersType || 562 ref->msotype() == MetaspaceObj::KlassTrainingDataType || 563 ref->msotype() == MetaspaceObj::MethodTrainingDataType || 564 ref->msotype() == MetaspaceObj::CompileTrainingDataType) { 565 return (TrainingData::need_data() || TrainingData::assembling_data()) ? make_a_copy : set_to_null; 566 } else if (ref->msotype() == MetaspaceObj::AdapterHandlerEntryType) { 567 if (CDSConfig::is_dumping_adapters()) { 568 AdapterHandlerEntry* entry = (AdapterHandlerEntry*)ref->obj(); 569 return AdapterHandlerLibrary::is_abstract_method_adapter(entry) ? set_to_null : make_a_copy; 570 } else { 571 return set_to_null; 572 } 573 } else { 574 if (ref->msotype() == MetaspaceObj::ClassType) { 575 Klass* klass = (Klass*)ref->obj(); 576 assert(klass->is_klass(), "must be"); 577 if (RegeneratedClasses::has_been_regenerated(klass)) { 578 klass = RegeneratedClasses::get_regenerated_object(klass); 579 } 580 if (is_excluded(klass)) { 581 ResourceMark rm; 582 log_debug(cds, dynamic)("Skipping class (excluded): %s", klass->external_name()); 583 return set_to_null; 584 } 585 } 586 587 return make_a_copy; 588 } 589 } 590 591 void ArchiveBuilder::start_dump_region(DumpRegion* next) { 592 current_dump_region()->pack(next); 593 _current_dump_region = next; 594 } 595 596 char* ArchiveBuilder::ro_strdup(const char* s) { 597 char* archived_str = ro_region_alloc((int)strlen(s) + 1); 598 strcpy(archived_str, s); 599 return archived_str; 600 } 601 602 // The objects that have embedded pointers will sink 603 // towards the end of the list. This ensures we have a maximum 604 // number of leading zero bits in the relocation bitmap. 605 int ArchiveBuilder::compare_src_objs(SourceObjInfo** a, SourceObjInfo** b) { 606 if ((*a)->has_embedded_pointer() && !(*b)->has_embedded_pointer()) { 607 return 1; 608 } else if (!(*a)->has_embedded_pointer() && (*b)->has_embedded_pointer()) { 609 return -1; 610 } else { 611 // This is necessary to keep the sorting order stable. Otherwise the 612 // archive's contents may not be deterministic. 613 return (*a)->id() - (*b)->id(); 614 } 615 } 616 617 void ArchiveBuilder::sort_metadata_objs() { 618 _rw_src_objs.objs()->sort(compare_src_objs); 619 _ro_src_objs.objs()->sort(compare_src_objs); 620 } 621 622 void ArchiveBuilder::dump_rw_metadata() { 623 ResourceMark rm; 624 aot_log_info(aot)("Allocating RW objects ... "); 625 make_shallow_copies(&_rw_region, &_rw_src_objs); 626 627 #if INCLUDE_CDS_JAVA_HEAP 628 if (CDSConfig::is_dumping_full_module_graph()) { 629 // Archive the ModuleEntry's and PackageEntry's of the 3 built-in loaders 630 char* start = rw_region()->top(); 631 ClassLoaderDataShared::allocate_archived_tables(); 632 alloc_stats()->record_modules(rw_region()->top() - start, /*read_only*/false); 633 } 634 #endif 635 } 636 637 void ArchiveBuilder::dump_ro_metadata() { 638 ResourceMark rm; 639 aot_log_info(aot)("Allocating RO objects ... "); 640 641 start_dump_region(&_ro_region); 642 make_shallow_copies(&_ro_region, &_ro_src_objs); 643 644 #if INCLUDE_CDS_JAVA_HEAP 645 if (CDSConfig::is_dumping_full_module_graph()) { 646 char* start = ro_region()->top(); 647 ClassLoaderDataShared::init_archived_tables(); 648 alloc_stats()->record_modules(ro_region()->top() - start, /*read_only*/true); 649 } 650 #endif 651 652 RegeneratedClasses::record_regenerated_objects(); 653 } 654 655 void ArchiveBuilder::make_shallow_copies(DumpRegion *dump_region, 656 const ArchiveBuilder::SourceObjList* src_objs) { 657 for (int i = 0; i < src_objs->objs()->length(); i++) { 658 make_shallow_copy(dump_region, src_objs->objs()->at(i)); 659 } 660 aot_log_info(aot)("done (%d objects)", src_objs->objs()->length()); 661 } 662 663 void ArchiveBuilder::make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info) { 664 address src = src_info->source_addr(); 665 int bytes = src_info->size_in_bytes(); 666 char* dest; 667 char* oldtop; 668 char* newtop; 669 670 oldtop = dump_region->top(); 671 if (src_info->msotype() == MetaspaceObj::ClassType) { 672 // Allocate space for a pointer directly in front of the future InstanceKlass, so 673 // we can do a quick lookup from InstanceKlass* -> RunTimeClassInfo* 674 // without building another hashtable. See RunTimeClassInfo::get_for() 675 // in systemDictionaryShared.cpp. 676 Klass* klass = (Klass*)src; 677 if (klass->is_instance_klass()) { 678 SystemDictionaryShared::validate_before_archiving(InstanceKlass::cast(klass)); 679 dump_region->allocate(sizeof(address)); 680 } 681 // Allocate space for the future InstanceKlass with proper alignment 682 const size_t alignment = 683 #ifdef _LP64 684 UseCompressedClassPointers ? 685 nth_bit(ArchiveBuilder::precomputed_narrow_klass_shift()) : 686 SharedSpaceObjectAlignment; 687 #else 688 SharedSpaceObjectAlignment; 689 #endif 690 dest = dump_region->allocate(bytes, alignment); 691 } else { 692 dest = dump_region->allocate(bytes); 693 } 694 newtop = dump_region->top(); 695 696 memcpy(dest, src, bytes); 697 698 // Update the hash of buffered sorted symbols for static dump so that the symbols have deterministic contents 699 if (CDSConfig::is_dumping_static_archive() && (src_info->msotype() == MetaspaceObj::SymbolType)) { 700 Symbol* buffered_symbol = (Symbol*)dest; 701 assert(((Symbol*)src)->is_permanent(), "archived symbols must be permanent"); 702 buffered_symbol->update_identity_hash(); 703 } 704 705 { 706 bool created; 707 _buffered_to_src_table.put_if_absent((address)dest, src, &created); 708 assert(created, "must be"); 709 if (_buffered_to_src_table.maybe_grow()) { 710 log_info(aot, hashtables)("Expanded _buffered_to_src_table table to %d", _buffered_to_src_table.table_size()); 711 } 712 } 713 714 intptr_t* archived_vtable = CppVtables::get_archived_vtable(src_info->msotype(), (address)dest); 715 if (archived_vtable != nullptr) { 716 *(address*)dest = (address)archived_vtable; 717 ArchivePtrMarker::mark_pointer((address*)dest); 718 } 719 720 log_trace(aot)("Copy: " PTR_FORMAT " ==> " PTR_FORMAT " %d", p2i(src), p2i(dest), bytes); 721 src_info->set_buffered_addr((address)dest); 722 723 _alloc_stats.record(src_info->msotype(), int(newtop - oldtop), src_info->read_only()); 724 725 DEBUG_ONLY(_alloc_stats.verify((int)dump_region->used(), src_info->read_only())); 726 } 727 728 // This is used by code that hand-assembles data structures, such as the LambdaProxyClassKey, that are 729 // not handled by MetaspaceClosure. 730 void ArchiveBuilder::write_pointer_in_buffer(address* ptr_location, address src_addr) { 731 assert(is_in_buffer_space(ptr_location), "must be"); 732 if (src_addr == nullptr) { 733 *ptr_location = nullptr; 734 ArchivePtrMarker::clear_pointer(ptr_location); 735 } else { 736 *ptr_location = get_buffered_addr(src_addr); 737 ArchivePtrMarker::mark_pointer(ptr_location); 738 } 739 } 740 741 void ArchiveBuilder::mark_and_relocate_to_buffered_addr(address* ptr_location) { 742 assert(*ptr_location != nullptr, "sanity"); 743 if (!is_in_mapped_static_archive(*ptr_location)) { 744 *ptr_location = get_buffered_addr(*ptr_location); 745 } 746 ArchivePtrMarker::mark_pointer(ptr_location); 747 } 748 749 bool ArchiveBuilder::has_been_archived(address src_addr) const { 750 SourceObjInfo* p = _src_obj_table.get(src_addr); 751 return (p != nullptr); 752 } 753 754 bool ArchiveBuilder::has_been_buffered(address src_addr) const { 755 if (RegeneratedClasses::has_been_regenerated(src_addr) || 756 _src_obj_table.get(src_addr) == nullptr || 757 get_buffered_addr(src_addr) == nullptr) { 758 return false; 759 } else { 760 return true; 761 } 762 } 763 764 address ArchiveBuilder::get_buffered_addr(address src_addr) const { 765 SourceObjInfo* p = _src_obj_table.get(src_addr); 766 assert(p != nullptr, "src_addr " INTPTR_FORMAT " is used but has not been archived", 767 p2i(src_addr)); 768 769 return p->buffered_addr(); 770 } 771 772 address ArchiveBuilder::get_source_addr(address buffered_addr) const { 773 assert(is_in_buffer_space(buffered_addr), "must be"); 774 address* src_p = _buffered_to_src_table.get(buffered_addr); 775 assert(src_p != nullptr && *src_p != nullptr, "must be"); 776 return *src_p; 777 } 778 779 void ArchiveBuilder::relocate_embedded_pointers(ArchiveBuilder::SourceObjList* src_objs) { 780 for (int i = 0; i < src_objs->objs()->length(); i++) { 781 src_objs->relocate(i, this); 782 } 783 } 784 785 void ArchiveBuilder::relocate_metaspaceobj_embedded_pointers() { 786 aot_log_info(aot)("Relocating embedded pointers in core regions ... "); 787 relocate_embedded_pointers(&_rw_src_objs); 788 relocate_embedded_pointers(&_ro_src_objs); 789 log_info(cds)("Relocating %zu pointers, %zu tagged, %zu nulled", 790 _relocated_ptr_info._num_ptrs, 791 _relocated_ptr_info._num_tagged_ptrs, 792 _relocated_ptr_info._num_nulled_ptrs); 793 } 794 795 #define ADD_COUNT(x) \ 796 x += 1; \ 797 x ## _a += aotlinked ? 1 : 0; \ 798 x ## _i += inited ? 1 : 0; 799 800 #define DECLARE_INSTANCE_KLASS_COUNTER(x) \ 801 int x = 0; \ 802 int x ## _a = 0; \ 803 int x ## _i = 0; 804 805 void ArchiveBuilder::make_klasses_shareable() { 806 DECLARE_INSTANCE_KLASS_COUNTER(num_instance_klasses); 807 DECLARE_INSTANCE_KLASS_COUNTER(num_boot_klasses); 808 DECLARE_INSTANCE_KLASS_COUNTER(num_vm_klasses); 809 DECLARE_INSTANCE_KLASS_COUNTER(num_platform_klasses); 810 DECLARE_INSTANCE_KLASS_COUNTER(num_app_klasses); 811 DECLARE_INSTANCE_KLASS_COUNTER(num_old_klasses); 812 DECLARE_INSTANCE_KLASS_COUNTER(num_hidden_klasses); 813 DECLARE_INSTANCE_KLASS_COUNTER(num_enum_klasses); 814 DECLARE_INSTANCE_KLASS_COUNTER(num_unregistered_klasses); 815 int num_unlinked_klasses = 0; 816 int num_obj_array_klasses = 0; 817 int num_type_array_klasses = 0; 818 819 int boot_unlinked = 0; 820 int platform_unlinked = 0; 821 int app_unlinked = 0; 822 int unreg_unlinked = 0; 823 824 for (int i = 0; i < klasses()->length(); i++) { 825 // Some of the code in ConstantPool::remove_unshareable_info() requires the classes 826 // to be in linked state, so it must be call here before the next loop, which returns 827 // all classes to unlinked state. 828 Klass* k = get_buffered_addr(klasses()->at(i)); 829 if (k->is_instance_klass()) { 830 InstanceKlass::cast(k)->constants()->remove_unshareable_info(); 831 } 832 } 833 834 for (int i = 0; i < klasses()->length(); i++) { 835 const char* type; 836 const char* unlinked = ""; 837 const char* kind = ""; 838 const char* hidden = ""; 839 const char* old = ""; 840 const char* generated = ""; 841 const char* aotlinked_msg = ""; 842 const char* inited_msg = ""; 843 Klass* k = get_buffered_addr(klasses()->at(i)); 844 bool inited = false; 845 k->remove_java_mirror(); 846 #ifdef _LP64 847 if (UseCompactObjectHeaders) { 848 Klass* requested_k = to_requested(k); 849 address narrow_klass_base = _requested_static_archive_bottom; // runtime encoding base == runtime mapping start 850 const int narrow_klass_shift = precomputed_narrow_klass_shift(); 851 narrowKlass nk = CompressedKlassPointers::encode_not_null_without_asserts(requested_k, narrow_klass_base, narrow_klass_shift); 852 k->set_prototype_header_klass(nk); 853 } 854 #endif //_LP64 855 if (k->is_flatArray_klass()) { 856 num_obj_array_klasses ++; 857 type = "flat array"; 858 } else if (k->is_refArray_klass()) { 859 num_obj_array_klasses ++; 860 type = "ref array"; 861 } else if (k->is_objArray_klass()) { 862 // InstanceKlass and TypeArrayKlass will in turn call remove_unshareable_info 863 // on their array classes. 864 num_obj_array_klasses ++; 865 type = "obj array"; 866 } else if (k->is_typeArray_klass()) { 867 num_type_array_klasses ++; 868 type = "array"; 869 k->remove_unshareable_info(); 870 } else { 871 assert(k->is_instance_klass(), " must be"); 872 InstanceKlass* ik = InstanceKlass::cast(k); 873 InstanceKlass* src_ik = get_source_addr(ik); 874 bool aotlinked = AOTClassLinker::is_candidate(src_ik); 875 inited = ik->has_aot_initialized_mirror(); 876 ADD_COUNT(num_instance_klasses); 877 if (ik->is_hidden()) { 878 ADD_COUNT(num_hidden_klasses); 879 hidden = " hidden"; 880 oop loader = k->class_loader(); 881 if (loader == nullptr) { 882 type = "boot"; 883 ADD_COUNT(num_boot_klasses); 884 } else if (loader == SystemDictionary::java_platform_loader()) { 885 type = "plat"; 886 ADD_COUNT(num_platform_klasses); 887 } else if (loader == SystemDictionary::java_system_loader()) { 888 type = "app"; 889 ADD_COUNT(num_app_klasses); 890 } else { 891 type = "bad"; 892 assert(0, "shouldn't happen"); 893 } 894 if (CDSConfig::is_dumping_method_handles()) { 895 assert(HeapShared::is_archivable_hidden_klass(ik), "sanity"); 896 } else { 897 // Legacy CDS support for lambda proxies 898 CDS_JAVA_HEAP_ONLY(assert(HeapShared::is_lambda_proxy_klass(ik), "sanity");) 899 } 900 } else if (ik->defined_by_boot_loader()) { 901 type = "boot"; 902 ADD_COUNT(num_boot_klasses); 903 } else if (ik->defined_by_platform_loader()) { 904 type = "plat"; 905 ADD_COUNT(num_platform_klasses); 906 } else if (ik->defined_by_app_loader()) { 907 type = "app"; 908 ADD_COUNT(num_app_klasses); 909 } else { 910 assert(ik->defined_by_other_loaders(), "must be"); 911 type = "unreg"; 912 ADD_COUNT(num_unregistered_klasses); 913 } 914 915 if (AOTClassLinker::is_vm_class(src_ik)) { 916 ADD_COUNT(num_vm_klasses); 917 } 918 919 if (!ik->is_linked()) { 920 num_unlinked_klasses ++; 921 unlinked = " unlinked"; 922 if (ik->defined_by_boot_loader()) { 923 boot_unlinked ++; 924 } else if (ik->defined_by_platform_loader()) { 925 platform_unlinked ++; 926 } else if (ik->defined_by_app_loader()) { 927 app_unlinked ++; 928 } else { 929 unreg_unlinked ++; 930 } 931 } 932 933 if (ik->is_interface()) { 934 kind = " interface"; 935 } else if (src_ik->is_enum_subclass()) { 936 kind = " enum"; 937 ADD_COUNT(num_enum_klasses); 938 } 939 940 if (!ik->can_be_verified_at_dumptime()) { 941 ADD_COUNT(num_old_klasses); 942 old = " old"; 943 } 944 945 if (ik->is_generated_shared_class()) { 946 generated = " generated"; 947 } 948 if (aotlinked) { 949 aotlinked_msg = " aot-linked"; 950 } 951 if (inited) { 952 if (InstanceKlass::cast(k)->static_field_size() == 0) { 953 inited_msg = " inited (no static fields)"; 954 } else { 955 inited_msg = " inited"; 956 } 957 } 958 959 MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread::current(), ik); 960 ik->remove_unshareable_info(); 961 } 962 963 if (aot_log_is_enabled(Debug, aot, class)) { 964 ResourceMark rm; 965 aot_log_debug(aot, class)("klasses[%5d] = " PTR_FORMAT " %-5s %s%s%s%s%s%s%s%s", i, 966 p2i(to_requested(k)), type, k->external_name(), 967 kind, hidden, old, unlinked, generated, aotlinked_msg, inited_msg); 968 } 969 } 970 971 #define STATS_FORMAT "= %5d, aot-linked = %5d, inited = %5d" 972 #define STATS_PARAMS(x) num_ ## x, num_ ## x ## _a, num_ ## x ## _i 973 974 aot_log_info(aot)("Number of classes %d", num_instance_klasses + num_obj_array_klasses + num_type_array_klasses); 975 aot_log_info(aot)(" instance classes " STATS_FORMAT, STATS_PARAMS(instance_klasses)); 976 aot_log_info(aot)(" boot " STATS_FORMAT, STATS_PARAMS(boot_klasses)); 977 aot_log_info(aot)(" vm " STATS_FORMAT, STATS_PARAMS(vm_klasses)); 978 aot_log_info(aot)(" platform " STATS_FORMAT, STATS_PARAMS(platform_klasses)); 979 aot_log_info(aot)(" app " STATS_FORMAT, STATS_PARAMS(app_klasses)); 980 aot_log_info(aot)(" unregistered " STATS_FORMAT, STATS_PARAMS(unregistered_klasses)); 981 aot_log_info(aot)(" (enum) " STATS_FORMAT, STATS_PARAMS(enum_klasses)); 982 aot_log_info(aot)(" (hidden) " STATS_FORMAT, STATS_PARAMS(hidden_klasses)); 983 aot_log_info(aot)(" (old) " STATS_FORMAT, STATS_PARAMS(old_klasses)); 984 aot_log_info(aot)(" (unlinked) = %5d, boot = %d, plat = %d, app = %d, unreg = %d", 985 num_unlinked_klasses, boot_unlinked, platform_unlinked, app_unlinked, unreg_unlinked); 986 aot_log_info(aot)(" obj array classes = %5d", num_obj_array_klasses); 987 aot_log_info(aot)(" type array classes = %5d", num_type_array_klasses); 988 aot_log_info(aot)(" symbols = %5d", _symbols->length()); 989 990 #undef STATS_FORMAT 991 #undef STATS_PARAMS 992 993 DynamicArchive::make_array_klasses_shareable(); 994 } 995 996 void ArchiveBuilder::make_training_data_shareable() { 997 auto clean_td = [&] (address& src_obj, SourceObjInfo& info) { 998 if (!is_in_buffer_space(info.buffered_addr())) { 999 return; 1000 } 1001 1002 if (info.msotype() == MetaspaceObj::KlassTrainingDataType || 1003 info.msotype() == MetaspaceObj::MethodTrainingDataType || 1004 info.msotype() == MetaspaceObj::CompileTrainingDataType) { 1005 TrainingData* buffered_td = (TrainingData*)info.buffered_addr(); 1006 buffered_td->remove_unshareable_info(); 1007 } else if (info.msotype() == MetaspaceObj::MethodDataType) { 1008 MethodData* buffered_mdo = (MethodData*)info.buffered_addr(); 1009 buffered_mdo->remove_unshareable_info(); 1010 } else if (info.msotype() == MetaspaceObj::MethodCountersType) { 1011 MethodCounters* buffered_mc = (MethodCounters*)info.buffered_addr(); 1012 buffered_mc->remove_unshareable_info(); 1013 } 1014 }; 1015 _src_obj_table.iterate_all(clean_td); 1016 } 1017 1018 void ArchiveBuilder::serialize_dynamic_archivable_items(SerializeClosure* soc) { 1019 SymbolTable::serialize_shared_table_header(soc, false); 1020 SystemDictionaryShared::serialize_dictionary_headers(soc, false); 1021 DynamicArchive::serialize_array_klasses(soc); 1022 AOTLinkedClassBulkLoader::serialize(soc, false); 1023 } 1024 1025 uintx ArchiveBuilder::buffer_to_offset(address p) const { 1026 address requested_p = to_requested(p); 1027 assert(requested_p >= _requested_static_archive_bottom, "must be"); 1028 return requested_p - _requested_static_archive_bottom; 1029 } 1030 1031 uintx ArchiveBuilder::any_to_offset(address p) const { 1032 if (is_in_mapped_static_archive(p)) { 1033 assert(CDSConfig::is_dumping_dynamic_archive(), "must be"); 1034 return p - _mapped_static_archive_bottom; 1035 } 1036 if (!is_in_buffer_space(p)) { 1037 // p must be a "source" address 1038 p = get_buffered_addr(p); 1039 } 1040 return buffer_to_offset(p); 1041 } 1042 1043 address ArchiveBuilder::offset_to_buffered_address(u4 offset) const { 1044 address requested_addr = _requested_static_archive_bottom + offset; 1045 address buffered_addr = requested_addr - _buffer_to_requested_delta; 1046 assert(is_in_buffer_space(buffered_addr), "bad offset"); 1047 return buffered_addr; 1048 } 1049 1050 void ArchiveBuilder::start_ac_region() { 1051 ro_region()->pack(); 1052 start_dump_region(&_ac_region); 1053 } 1054 1055 void ArchiveBuilder::end_ac_region() { 1056 _ac_region.pack(); 1057 } 1058 1059 #if INCLUDE_CDS_JAVA_HEAP 1060 narrowKlass ArchiveBuilder::get_requested_narrow_klass(Klass* k) { 1061 assert(CDSConfig::is_dumping_heap(), "sanity"); 1062 k = get_buffered_klass(k); 1063 Klass* requested_k = to_requested(k); 1064 const int narrow_klass_shift = ArchiveBuilder::precomputed_narrow_klass_shift(); 1065 #ifdef ASSERT 1066 const size_t klass_alignment = MAX2(SharedSpaceObjectAlignment, (size_t)nth_bit(narrow_klass_shift)); 1067 assert(is_aligned(k, klass_alignment), "Klass " PTR_FORMAT " misaligned.", p2i(k)); 1068 #endif 1069 address narrow_klass_base = _requested_static_archive_bottom; // runtime encoding base == runtime mapping start 1070 // Note: use the "raw" version of encode that takes explicit narrow klass base and shift. Don't use any 1071 // of the variants that do sanity checks, nor any of those that use the current - dump - JVM's encoding setting. 1072 return CompressedKlassPointers::encode_not_null_without_asserts(requested_k, narrow_klass_base, narrow_klass_shift); 1073 } 1074 #endif // INCLUDE_CDS_JAVA_HEAP 1075 1076 // RelocateBufferToRequested --- Relocate all the pointers in rw/ro, 1077 // so that the archive can be mapped to the "requested" location without runtime relocation. 1078 // 1079 // - See ArchiveBuilder header for the definition of "buffer", "mapped" and "requested" 1080 // - ArchivePtrMarker::ptrmap() marks all the pointers in the rw/ro regions 1081 // - Every pointer must have one of the following values: 1082 // [a] nullptr: 1083 // No relocation is needed. Remove this pointer from ptrmap so we don't need to 1084 // consider it at runtime. 1085 // [b] Points into an object X which is inside the buffer: 1086 // Adjust this pointer by _buffer_to_requested_delta, so it points to X 1087 // when the archive is mapped at the requested location. 1088 // [c] Points into an object Y which is inside mapped static archive: 1089 // - This happens only during dynamic dump 1090 // - Adjust this pointer by _mapped_to_requested_static_archive_delta, 1091 // so it points to Y when the static archive is mapped at the requested location. 1092 template <bool STATIC_DUMP> 1093 class RelocateBufferToRequested : public BitMapClosure { 1094 ArchiveBuilder* _builder; 1095 address _buffer_bottom; 1096 intx _buffer_to_requested_delta; 1097 intx _mapped_to_requested_static_archive_delta; 1098 size_t _max_non_null_offset; 1099 1100 public: 1101 RelocateBufferToRequested(ArchiveBuilder* builder) { 1102 _builder = builder; 1103 _buffer_bottom = _builder->buffer_bottom(); 1104 _buffer_to_requested_delta = builder->buffer_to_requested_delta(); 1105 _mapped_to_requested_static_archive_delta = builder->requested_static_archive_bottom() - builder->mapped_static_archive_bottom(); 1106 _max_non_null_offset = 0; 1107 1108 address bottom = _builder->buffer_bottom(); 1109 address top = _builder->buffer_top(); 1110 address new_bottom = bottom + _buffer_to_requested_delta; 1111 address new_top = top + _buffer_to_requested_delta; 1112 aot_log_debug(aot)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT "] to " 1113 "[" INTPTR_FORMAT " - " INTPTR_FORMAT "]", 1114 p2i(bottom), p2i(top), 1115 p2i(new_bottom), p2i(new_top)); 1116 } 1117 1118 bool do_bit(size_t offset) { 1119 address* p = (address*)_buffer_bottom + offset; 1120 assert(_builder->is_in_buffer_space(p), "pointer must live in buffer space"); 1121 1122 if (*p == nullptr) { 1123 // todo -- clear bit, etc 1124 ArchivePtrMarker::ptrmap()->clear_bit(offset); 1125 } else { 1126 if (STATIC_DUMP) { 1127 assert(_builder->is_in_buffer_space(*p), "old pointer must point inside buffer space"); 1128 *p += _buffer_to_requested_delta; 1129 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive"); 1130 } else { 1131 if (_builder->is_in_buffer_space(*p)) { 1132 *p += _buffer_to_requested_delta; 1133 // assert is in requested dynamic archive 1134 } else { 1135 assert(_builder->is_in_mapped_static_archive(*p), "old pointer must point inside buffer space or mapped static archive"); 1136 *p += _mapped_to_requested_static_archive_delta; 1137 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive"); 1138 } 1139 } 1140 _max_non_null_offset = offset; 1141 } 1142 1143 return true; // keep iterating 1144 } 1145 1146 void doit() { 1147 ArchivePtrMarker::ptrmap()->iterate(this); 1148 ArchivePtrMarker::compact(_max_non_null_offset); 1149 } 1150 }; 1151 1152 #ifdef _LP64 1153 int ArchiveBuilder::precomputed_narrow_klass_shift() { 1154 // Legacy Mode: 1155 // We use 32 bits for narrowKlass, which should cover the full 4G Klass range. Shift can be 0. 1156 // CompactObjectHeader Mode: 1157 // narrowKlass is much smaller, and we use the highest possible shift value to later get the maximum 1158 // Klass encoding range. 1159 // 1160 // Note that all of this may change in the future, if we decide to correct the pre-calculated 1161 // narrow Klass IDs at archive load time. 1162 assert(UseCompressedClassPointers, "Only needed for compressed class pointers"); 1163 return UseCompactObjectHeaders ? CompressedKlassPointers::max_shift() : 0; 1164 } 1165 #endif // _LP64 1166 1167 void ArchiveBuilder::relocate_to_requested() { 1168 if (!ro_region()->is_packed()) { 1169 ro_region()->pack(); 1170 } 1171 size_t my_archive_size = buffer_top() - buffer_bottom(); 1172 1173 if (CDSConfig::is_dumping_static_archive()) { 1174 _requested_static_archive_top = _requested_static_archive_bottom + my_archive_size; 1175 RelocateBufferToRequested<true> patcher(this); 1176 patcher.doit(); 1177 } else { 1178 assert(CDSConfig::is_dumping_dynamic_archive(), "must be"); 1179 _requested_dynamic_archive_top = _requested_dynamic_archive_bottom + my_archive_size; 1180 RelocateBufferToRequested<false> patcher(this); 1181 patcher.doit(); 1182 } 1183 } 1184 1185 // Write detailed info to a mapfile to analyze contents of the archive. 1186 // static dump: 1187 // java -Xshare:dump -Xlog:cds+map=trace:file=cds.map:none:filesize=0 1188 // dynamic dump: 1189 // java -cp MyApp.jar -XX:ArchiveClassesAtExit=MyApp.jsa \ 1190 // -Xlog:cds+map=trace:file=cds.map:none:filesize=0 MyApp 1191 // 1192 // We need to do some address translation because the buffers used at dump time may be mapped to 1193 // a different location at runtime. At dump time, the buffers may be at arbitrary locations 1194 // picked by the OS. At runtime, we try to map at a fixed location (SharedBaseAddress). For 1195 // consistency, we log everything using runtime addresses. 1196 class ArchiveBuilder::CDSMapLogger : AllStatic { 1197 static intx buffer_to_runtime_delta() { 1198 // Translate the buffers used by the RW/RO regions to their eventual (requested) locations 1199 // at runtime. 1200 return ArchiveBuilder::current()->buffer_to_requested_delta(); 1201 } 1202 1203 // rw/ro regions only 1204 static void log_metaspace_region(const char* name, DumpRegion* region, 1205 const ArchiveBuilder::SourceObjList* src_objs) { 1206 address region_base = address(region->base()); 1207 address region_top = address(region->top()); 1208 log_region(name, region_base, region_top, region_base + buffer_to_runtime_delta()); 1209 log_metaspace_objects(region, src_objs); 1210 } 1211 1212 #define _LOG_PREFIX PTR_FORMAT ": @@ %-17s %d" 1213 1214 static void log_klass(Klass* k, address runtime_dest, const char* type_name, int bytes, Thread* current) { 1215 ResourceMark rm(current); 1216 log_debug(aot, map)(_LOG_PREFIX " %s", 1217 p2i(runtime_dest), type_name, bytes, k->external_name()); 1218 } 1219 static void log_method(Method* m, address runtime_dest, const char* type_name, int bytes, Thread* current) { 1220 ResourceMark rm(current); 1221 log_debug(aot, map)(_LOG_PREFIX " %s", 1222 p2i(runtime_dest), type_name, bytes, m->external_name()); 1223 } 1224 1225 // rw/ro regions only 1226 static void log_metaspace_objects(DumpRegion* region, const ArchiveBuilder::SourceObjList* src_objs) { 1227 address last_obj_base = address(region->base()); 1228 address last_obj_end = address(region->base()); 1229 address region_end = address(region->end()); 1230 Thread* current = Thread::current(); 1231 for (int i = 0; i < src_objs->objs()->length(); i++) { 1232 SourceObjInfo* src_info = src_objs->at(i); 1233 address src = src_info->source_addr(); 1234 address dest = src_info->buffered_addr(); 1235 log_as_hex(last_obj_base, dest, last_obj_base + buffer_to_runtime_delta()); 1236 address runtime_dest = dest + buffer_to_runtime_delta(); 1237 int bytes = src_info->size_in_bytes(); 1238 1239 MetaspaceObj::Type type = src_info->msotype(); 1240 const char* type_name = MetaspaceObj::type_name(type); 1241 1242 switch (type) { 1243 case MetaspaceObj::ClassType: 1244 log_klass((Klass*)src, runtime_dest, type_name, bytes, current); 1245 break; 1246 case MetaspaceObj::ConstantPoolType: 1247 log_klass(((ConstantPool*)src)->pool_holder(), 1248 runtime_dest, type_name, bytes, current); 1249 break; 1250 case MetaspaceObj::ConstantPoolCacheType: 1251 log_klass(((ConstantPoolCache*)src)->constant_pool()->pool_holder(), 1252 runtime_dest, type_name, bytes, current); 1253 break; 1254 case MetaspaceObj::MethodType: 1255 log_method((Method*)src, runtime_dest, type_name, bytes, current); 1256 break; 1257 case MetaspaceObj::ConstMethodType: 1258 log_method(((ConstMethod*)src)->method(), runtime_dest, type_name, bytes, current); 1259 break; 1260 case MetaspaceObj::SymbolType: 1261 { 1262 ResourceMark rm(current); 1263 Symbol* s = (Symbol*)src; 1264 log_debug(aot, map)(_LOG_PREFIX " %s", p2i(runtime_dest), type_name, bytes, 1265 s->as_quoted_ascii()); 1266 } 1267 break; 1268 default: 1269 log_debug(aot, map)(_LOG_PREFIX, p2i(runtime_dest), type_name, bytes); 1270 break; 1271 } 1272 1273 last_obj_base = dest; 1274 last_obj_end = dest + bytes; 1275 } 1276 1277 log_as_hex(last_obj_base, last_obj_end, last_obj_base + buffer_to_runtime_delta()); 1278 if (last_obj_end < region_end) { 1279 log_debug(aot, map)(PTR_FORMAT ": @@ Misc data %zu bytes", 1280 p2i(last_obj_end + buffer_to_runtime_delta()), 1281 size_t(region_end - last_obj_end)); 1282 log_as_hex(last_obj_end, region_end, last_obj_end + buffer_to_runtime_delta()); 1283 } 1284 } 1285 1286 #undef _LOG_PREFIX 1287 1288 // Log information about a region, whose address at dump time is [base .. top). At 1289 // runtime, this region will be mapped to requested_base. requested_base is nullptr if this 1290 // region will be mapped at os-selected addresses (such as the bitmap region), or will 1291 // be accessed with os::read (the header). 1292 // 1293 // Note: across -Xshare:dump runs, base may be different, but requested_base should 1294 // be the same as the archive contents should be deterministic. 1295 static void log_region(const char* name, address base, address top, address requested_base) { 1296 size_t size = top - base; 1297 base = requested_base; 1298 if (requested_base == nullptr) { 1299 top = (address)size; 1300 } else { 1301 top = requested_base + size; 1302 } 1303 log_info(aot, map)("[%-18s " PTR_FORMAT " - " PTR_FORMAT " %9zu bytes]", 1304 name, p2i(base), p2i(top), size); 1305 } 1306 1307 #if INCLUDE_CDS_JAVA_HEAP 1308 static void log_heap_region(ArchiveHeapInfo* heap_info) { 1309 MemRegion r = heap_info->buffer_region(); 1310 address start = address(r.start()); // start of the current oop inside the buffer 1311 address end = address(r.end()); 1312 log_region("heap", start, end, ArchiveHeapWriter::buffered_addr_to_requested_addr(start)); 1313 1314 LogStreamHandle(Info, aot, map) st; 1315 1316 HeapRootSegments segments = heap_info->heap_root_segments(); 1317 assert(segments.base_offset() == 0, "Sanity"); 1318 1319 for (size_t seg_idx = 0; seg_idx < segments.count(); seg_idx++) { 1320 address requested_start = ArchiveHeapWriter::buffered_addr_to_requested_addr(start); 1321 st.print_cr(PTR_FORMAT ": Heap roots segment [%d]", 1322 p2i(requested_start), segments.size_in_elems(seg_idx)); 1323 start += segments.size_in_bytes(seg_idx); 1324 } 1325 log_heap_roots(); 1326 1327 while (start < end) { 1328 size_t byte_size; 1329 oop source_oop = ArchiveHeapWriter::buffered_addr_to_source_obj(start); 1330 address requested_start = ArchiveHeapWriter::buffered_addr_to_requested_addr(start); 1331 st.print(PTR_FORMAT ": @@ Object ", p2i(requested_start)); 1332 1333 if (source_oop != nullptr) { 1334 // This is a regular oop that got archived. 1335 // Don't print the requested addr again as we have just printed it at the beginning of the line. 1336 // Example: 1337 // 0x00000007ffd27938: @@ Object (0xfffa4f27) java.util.HashMap 1338 print_oop_info_cr(&st, source_oop, /*print_requested_addr=*/false); 1339 byte_size = source_oop->size() * BytesPerWord; 1340 } else if ((byte_size = ArchiveHeapWriter::get_filler_size_at(start)) > 0) { 1341 // We have a filler oop, which also does not exist in BufferOffsetToSourceObjectTable. 1342 // Example: 1343 // 0x00000007ffc3ffd8: @@ Object filler 40 bytes 1344 st.print_cr("filler %zu bytes", byte_size); 1345 } else { 1346 ShouldNotReachHere(); 1347 } 1348 1349 address oop_end = start + byte_size; 1350 log_as_hex(start, oop_end, requested_start, /*is_heap=*/true); 1351 1352 if (source_oop != nullptr) { 1353 log_oop_details(heap_info, source_oop, /*buffered_addr=*/start); 1354 } 1355 start = oop_end; 1356 } 1357 } 1358 1359 // ArchivedFieldPrinter is used to print the fields of archived objects. We can't 1360 // use _source_obj->print_on(), because we want to print the oop fields 1361 // in _source_obj with their requested addresses using print_oop_info_cr(). 1362 class ArchivedFieldPrinter : public FieldClosure { 1363 ArchiveHeapInfo* _heap_info; 1364 outputStream* _st; 1365 oop _source_obj; 1366 address _buffered_addr; 1367 public: 1368 ArchivedFieldPrinter(ArchiveHeapInfo* heap_info, outputStream* st, oop src_obj, address buffered_addr) : 1369 _heap_info(heap_info), _st(st), _source_obj(src_obj), _buffered_addr(buffered_addr) {} 1370 1371 void do_field(fieldDescriptor* fd) { 1372 _st->print(" - "); 1373 BasicType ft = fd->field_type(); 1374 switch (ft) { 1375 case T_ARRAY: 1376 case T_OBJECT: 1377 { 1378 fd->print_on(_st); // print just the name and offset 1379 oop obj = _source_obj->obj_field(fd->offset()); 1380 if (java_lang_Class::is_instance(obj)) { 1381 obj = HeapShared::scratch_java_mirror(obj); 1382 } 1383 print_oop_info_cr(_st, obj); 1384 } 1385 break; 1386 default: 1387 if (ArchiveHeapWriter::is_marked_as_native_pointer(_heap_info, _source_obj, fd->offset())) { 1388 print_as_native_pointer(fd); 1389 } else { 1390 fd->print_on_for(_st, cast_to_oop(_buffered_addr)); // name, offset, value 1391 _st->cr(); 1392 } 1393 } 1394 } 1395 1396 void print_as_native_pointer(fieldDescriptor* fd) { 1397 LP64_ONLY(assert(fd->field_type() == T_LONG, "must be")); 1398 NOT_LP64 (assert(fd->field_type() == T_INT, "must be")); 1399 1400 // We have a field that looks like an integer, but it's actually a pointer to a MetaspaceObj. 1401 address source_native_ptr = (address) 1402 LP64_ONLY(_source_obj->long_field(fd->offset())) 1403 NOT_LP64( _source_obj->int_field (fd->offset())); 1404 ArchiveBuilder* builder = ArchiveBuilder::current(); 1405 1406 // The value of the native pointer at runtime. 1407 address requested_native_ptr = builder->to_requested(builder->get_buffered_addr(source_native_ptr)); 1408 1409 // The address of _source_obj at runtime 1410 oop requested_obj = ArchiveHeapWriter::source_obj_to_requested_obj(_source_obj); 1411 // The address of this field in the requested space 1412 assert(requested_obj != nullptr, "Attempting to load field from null oop"); 1413 address requested_field_addr = cast_from_oop<address>(requested_obj) + fd->offset(); 1414 1415 fd->print_on(_st); 1416 _st->print_cr(PTR_FORMAT " (marked metadata pointer @" PTR_FORMAT " )", 1417 p2i(requested_native_ptr), p2i(requested_field_addr)); 1418 } 1419 }; 1420 1421 // Print the fields of instanceOops, or the elements of arrayOops 1422 static void log_oop_details(ArchiveHeapInfo* heap_info, oop source_oop, address buffered_addr) { 1423 LogStreamHandle(Trace, aot, map, oops) st; 1424 if (st.is_enabled()) { 1425 Klass* source_klass = source_oop->klass(); 1426 ArchiveBuilder* builder = ArchiveBuilder::current(); 1427 Klass* requested_klass = builder->to_requested(builder->get_buffered_addr(source_klass)); 1428 1429 st.print(" - klass: "); 1430 source_klass->print_value_on(&st); 1431 st.print(" " PTR_FORMAT, p2i(requested_klass)); 1432 st.cr(); 1433 1434 if (source_oop->is_typeArray()) { 1435 TypeArrayKlass::cast(source_klass)->oop_print_elements_on(typeArrayOop(source_oop), &st); 1436 } else if (source_oop->is_objArray()) { 1437 objArrayOop source_obj_array = objArrayOop(source_oop); 1438 for (int i = 0; i < source_obj_array->length(); i++) { 1439 st.print(" -%4d: ", i); 1440 oop obj = source_obj_array->obj_at(i); 1441 if (java_lang_Class::is_instance(obj)) { 1442 obj = HeapShared::scratch_java_mirror(obj); 1443 } 1444 print_oop_info_cr(&st, obj); 1445 } 1446 } else { 1447 st.print_cr(" - fields (%zu words):", source_oop->size()); 1448 ArchivedFieldPrinter print_field(heap_info, &st, source_oop, buffered_addr); 1449 InstanceKlass::cast(source_klass)->print_nonstatic_fields(&print_field); 1450 1451 if (java_lang_Class::is_instance(source_oop)) { 1452 oop scratch_mirror = source_oop; 1453 st.print(" - signature: "); 1454 print_class_signature_for_mirror(&st, scratch_mirror); 1455 st.cr(); 1456 1457 Klass* src_klass = java_lang_Class::as_Klass(scratch_mirror); 1458 if (src_klass != nullptr && src_klass->is_instance_klass()) { 1459 oop rr = HeapShared::scratch_resolved_references(InstanceKlass::cast(src_klass)->constants()); 1460 st.print(" - archived_resolved_references: "); 1461 print_oop_info_cr(&st, rr); 1462 1463 // We need to print the fields in the scratch_mirror, not the original mirror. 1464 // (if a class is not aot-initialized, static fields in its scratch mirror will be cleared). 1465 assert(scratch_mirror == HeapShared::scratch_java_mirror(src_klass->java_mirror()), "sanity"); 1466 st.print_cr("- ---- static fields (%d):", java_lang_Class::static_oop_field_count(scratch_mirror)); 1467 InstanceKlass::cast(src_klass)->do_local_static_fields(&print_field); 1468 } 1469 } 1470 } 1471 } 1472 } 1473 1474 static void print_class_signature_for_mirror(outputStream* st, oop scratch_mirror) { 1475 assert(java_lang_Class::is_instance(scratch_mirror), "sanity"); 1476 if (java_lang_Class::is_primitive(scratch_mirror)) { 1477 for (int i = T_BOOLEAN; i < T_VOID+1; i++) { 1478 BasicType bt = (BasicType)i; 1479 if (!is_reference_type(bt) && scratch_mirror == HeapShared::scratch_java_mirror(bt)) { 1480 oop orig_mirror = Universe::java_mirror(bt); 1481 java_lang_Class::print_signature(orig_mirror, st); 1482 return; 1483 } 1484 } 1485 ShouldNotReachHere(); 1486 } 1487 java_lang_Class::print_signature(scratch_mirror, st); 1488 } 1489 1490 static void log_heap_roots() { 1491 LogStreamHandle(Trace, aot, map, oops) st; 1492 if (st.is_enabled()) { 1493 for (int i = 0; i < HeapShared::pending_roots()->length(); i++) { 1494 st.print("roots[%4d]: ", i); 1495 print_oop_info_cr(&st, HeapShared::pending_roots()->at(i)); 1496 } 1497 } 1498 } 1499 1500 // Example output: 1501 // - The first number is the requested address (if print_requested_addr == true) 1502 // - The second number is the narrowOop version of the requested address (if UseCompressedOops == true) 1503 // 0x00000007ffc7e840 (0xfff8fd08) java.lang.Class Ljava/util/Array; 1504 // 0x00000007ffc000f8 (0xfff8001f) [B length: 11 1505 static void print_oop_info_cr(outputStream* st, oop source_oop, bool print_requested_addr = true) { 1506 if (source_oop == nullptr) { 1507 st->print_cr("null"); 1508 } else { 1509 ResourceMark rm; 1510 oop requested_obj = ArchiveHeapWriter::source_obj_to_requested_obj(source_oop); 1511 if (print_requested_addr) { 1512 st->print(PTR_FORMAT " ", p2i(requested_obj)); 1513 } 1514 if (UseCompressedOops) { 1515 st->print("(0x%08x) ", CompressedOops::narrow_oop_value(requested_obj)); 1516 } 1517 if (source_oop->is_array()) { 1518 int array_len = arrayOop(source_oop)->length(); 1519 st->print_cr("%s length: %d", source_oop->klass()->external_name(), array_len); 1520 } else { 1521 st->print("%s", source_oop->klass()->external_name()); 1522 1523 if (java_lang_String::is_instance(source_oop)) { 1524 st->print(" "); 1525 java_lang_String::print(source_oop, st); 1526 } else if (java_lang_Class::is_instance(source_oop)) { 1527 oop scratch_mirror = source_oop; 1528 1529 st->print(" "); 1530 print_class_signature_for_mirror(st, scratch_mirror); 1531 1532 Klass* src_klass = java_lang_Class::as_Klass(scratch_mirror); 1533 if (src_klass != nullptr && src_klass->is_instance_klass()) { 1534 InstanceKlass* buffered_klass = 1535 ArchiveBuilder::current()->get_buffered_addr(InstanceKlass::cast(src_klass)); 1536 if (buffered_klass->has_aot_initialized_mirror()) { 1537 st->print(" (aot-inited)"); 1538 } 1539 } 1540 } 1541 st->cr(); 1542 } 1543 } 1544 } 1545 #endif // INCLUDE_CDS_JAVA_HEAP 1546 1547 // Log all the data [base...top). Pretend that the base address 1548 // will be mapped to requested_base at run-time. 1549 static void log_as_hex(address base, address top, address requested_base, bool is_heap = false) { 1550 assert(top >= base, "must be"); 1551 1552 LogStreamHandle(Trace, aot, map) lsh; 1553 if (lsh.is_enabled()) { 1554 int unitsize = sizeof(address); 1555 if (is_heap && UseCompressedOops) { 1556 // This makes the compressed oop pointers easier to read, but 1557 // longs and doubles will be split into two words. 1558 unitsize = sizeof(narrowOop); 1559 } 1560 os::print_hex_dump(&lsh, base, top, unitsize, /* print_ascii=*/true, /* bytes_per_line=*/32, requested_base); 1561 } 1562 } 1563 1564 static void log_header(FileMapInfo* mapinfo) { 1565 LogStreamHandle(Info, aot, map) lsh; 1566 if (lsh.is_enabled()) { 1567 mapinfo->print(&lsh); 1568 } 1569 } 1570 1571 public: 1572 static void log(ArchiveBuilder* builder, FileMapInfo* mapinfo, 1573 ArchiveHeapInfo* heap_info, 1574 char* bitmap, size_t bitmap_size_in_bytes) { 1575 log_info(aot, map)("%s CDS archive map for %s", CDSConfig::is_dumping_static_archive() ? "Static" : "Dynamic", mapinfo->full_path()); 1576 1577 address header = address(mapinfo->header()); 1578 address header_end = header + mapinfo->header()->header_size(); 1579 log_region("header", header, header_end, nullptr); 1580 log_header(mapinfo); 1581 log_as_hex(header, header_end, nullptr); 1582 1583 DumpRegion* rw_region = &builder->_rw_region; 1584 DumpRegion* ro_region = &builder->_ro_region; 1585 1586 log_metaspace_region("rw region", rw_region, &builder->_rw_src_objs); 1587 log_metaspace_region("ro region", ro_region, &builder->_ro_src_objs); 1588 1589 address bitmap_end = address(bitmap + bitmap_size_in_bytes); 1590 log_region("bitmap", address(bitmap), bitmap_end, nullptr); 1591 log_as_hex((address)bitmap, bitmap_end, nullptr); 1592 1593 #if INCLUDE_CDS_JAVA_HEAP 1594 if (heap_info->is_used()) { 1595 log_heap_region(heap_info); 1596 } 1597 #endif 1598 1599 log_info(aot, map)("[End of CDS archive map]"); 1600 } 1601 }; // end ArchiveBuilder::CDSMapLogger 1602 1603 void ArchiveBuilder::print_stats() { 1604 _alloc_stats.print_stats(int(_ro_region.used()), int(_rw_region.used())); 1605 } 1606 1607 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo, ArchiveHeapInfo* heap_info) { 1608 // Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with 1609 // MetaspaceShared::n_regions (internal to hotspot). 1610 assert(NUM_CDS_REGIONS == MetaspaceShared::n_regions, "sanity"); 1611 1612 write_region(mapinfo, MetaspaceShared::rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false); 1613 write_region(mapinfo, MetaspaceShared::ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false); 1614 write_region(mapinfo, MetaspaceShared::ac, &_ac_region, /*read_only=*/false,/*allow_exec=*/false); 1615 1616 // Split pointer map into read-write and read-only bitmaps 1617 ArchivePtrMarker::initialize_rw_ro_maps(&_rw_ptrmap, &_ro_ptrmap); 1618 1619 size_t bitmap_size_in_bytes; 1620 char* bitmap = mapinfo->write_bitmap_region(ArchivePtrMarker::rw_ptrmap(), ArchivePtrMarker::ro_ptrmap(), heap_info, 1621 bitmap_size_in_bytes); 1622 1623 if (heap_info->is_used()) { 1624 _total_heap_region_size = mapinfo->write_heap_region(heap_info); 1625 } 1626 1627 print_region_stats(mapinfo, heap_info); 1628 1629 mapinfo->set_requested_base((char*)MetaspaceShared::requested_base_address()); 1630 mapinfo->set_header_crc(mapinfo->compute_header_crc()); 1631 // After this point, we should not write any data into mapinfo->header() since this 1632 // would corrupt its checksum we have calculated before. 1633 mapinfo->write_header(); 1634 mapinfo->close(); 1635 1636 if (log_is_enabled(Info, aot)) { 1637 log_info(aot)("Full module graph = %s", CDSConfig::is_dumping_full_module_graph() ? "enabled" : "disabled"); 1638 print_stats(); 1639 } 1640 1641 if (log_is_enabled(Info, aot, map)) { 1642 CDSMapLogger::log(this, mapinfo, heap_info, 1643 bitmap, bitmap_size_in_bytes); 1644 } 1645 CDS_JAVA_HEAP_ONLY(HeapShared::destroy_archived_object_cache()); 1646 FREE_C_HEAP_ARRAY(char, bitmap); 1647 } 1648 1649 void ArchiveBuilder::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) { 1650 mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec); 1651 } 1652 1653 void ArchiveBuilder::count_relocated_pointer(bool tagged, bool nulled) { 1654 _relocated_ptr_info._num_ptrs ++; 1655 _relocated_ptr_info._num_tagged_ptrs += tagged ? 1 : 0; 1656 _relocated_ptr_info._num_nulled_ptrs += nulled ? 1 : 0; 1657 } 1658 1659 void ArchiveBuilder::print_region_stats(FileMapInfo *mapinfo, ArchiveHeapInfo* heap_info) { 1660 // Print statistics of all the regions 1661 const size_t bitmap_used = mapinfo->region_at(MetaspaceShared::bm)->used(); 1662 const size_t bitmap_reserved = mapinfo->region_at(MetaspaceShared::bm)->used_aligned(); 1663 const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() + 1664 bitmap_reserved + 1665 _total_heap_region_size; 1666 const size_t total_bytes = _ro_region.used() + _rw_region.used() + 1667 bitmap_used + 1668 _total_heap_region_size; 1669 const double total_u_perc = percent_of(total_bytes, total_reserved); 1670 1671 _rw_region.print(total_reserved); 1672 _ro_region.print(total_reserved); 1673 _ac_region.print(total_reserved); 1674 1675 print_bitmap_region_stats(bitmap_used, total_reserved); 1676 1677 if (heap_info->is_used()) { 1678 print_heap_region_stats(heap_info, total_reserved); 1679 } 1680 1681 aot_log_debug(aot)("total : %9zu [100.0%% of total] out of %9zu bytes [%5.1f%% used]", 1682 total_bytes, total_reserved, total_u_perc); 1683 } 1684 1685 void ArchiveBuilder::print_bitmap_region_stats(size_t size, size_t total_size) { 1686 aot_log_debug(aot)("bm space: %9zu [ %4.1f%% of total] out of %9zu bytes [100.0%% used]", 1687 size, size/double(total_size)*100.0, size); 1688 } 1689 1690 void ArchiveBuilder::print_heap_region_stats(ArchiveHeapInfo *info, size_t total_size) { 1691 char* start = info->buffer_start(); 1692 size_t size = info->buffer_byte_size(); 1693 char* top = start + size; 1694 aot_log_debug(aot)("hp space: %9zu [ %4.1f%% of total] out of %9zu bytes [100.0%% used] at " INTPTR_FORMAT, 1695 size, size/double(total_size)*100.0, size, p2i(start)); 1696 } 1697 1698 void ArchiveBuilder::report_out_of_space(const char* name, size_t needed_bytes) { 1699 // This is highly unlikely to happen on 64-bits because we have reserved a 4GB space. 1700 // On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes 1701 // or so. 1702 _rw_region.print_out_of_space_msg(name, needed_bytes); 1703 _ro_region.print_out_of_space_msg(name, needed_bytes); 1704 1705 log_error(aot)("Unable to allocate from '%s' region: Please reduce the number of shared classes.", name); 1706 MetaspaceShared::unrecoverable_writing_error(); 1707 }