1 /* 2 * Copyright (c) 2020, 2026, 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/aotCacheAccess.hpp" 27 #include "cds/aotClassLinker.hpp" 28 #include "cds/aotCompressedPointers.hpp" 29 #include "cds/aotLogging.hpp" 30 #include "cds/aotMapLogger.hpp" 31 #include "cds/aotMetaspace.hpp" 32 #include "cds/archiveBuilder.hpp" 33 #include "cds/archiveUtils.hpp" 34 #include "cds/cdsConfig.hpp" 35 #include "cds/cppVtables.hpp" 36 #include "cds/dumpAllocStats.hpp" 37 #include "cds/dynamicArchive.hpp" 38 #include "cds/finalImageRecipes.hpp" 39 #include "cds/heapShared.hpp" 40 #include "cds/regeneratedClasses.hpp" 41 #include "classfile/classLoader.hpp" 42 #include "classfile/classLoaderDataShared.hpp" 43 #include "classfile/javaClasses.hpp" 44 #include "classfile/symbolTable.hpp" 45 #include "classfile/systemDictionaryShared.hpp" 46 #include "classfile/vmClasses.hpp" 47 #include "code/aotCodeCache.hpp" 48 #include "interpreter/abstractInterpreter.hpp" 49 #include "jvm.h" 50 #include "logging/log.hpp" 51 #include "memory/allStatic.hpp" 52 #include "memory/memoryReserver.hpp" 53 #include "memory/memRegion.hpp" 54 #include "memory/resourceArea.hpp" 55 #include "oops/compressedKlass.inline.hpp" 56 #include "oops/instanceKlass.hpp" 57 #include "oops/methodCounters.hpp" 58 #include "oops/methodData.hpp" 59 #include "oops/objArrayKlass.hpp" 60 #include "oops/objArrayOop.inline.hpp" 61 #include "oops/oopHandle.inline.hpp" 62 #include "oops/trainingData.hpp" 63 #include "runtime/arguments.hpp" 64 #include "runtime/globals_extension.hpp" 65 #include "runtime/javaThread.hpp" 66 #include "runtime/safepointVerifiers.hpp" 67 #include "runtime/sharedRuntime.hpp" 68 #include "utilities/align.hpp" 69 #include "utilities/bitMap.inline.hpp" 70 #include "utilities/formatBuffer.hpp" 71 72 ArchiveBuilder* ArchiveBuilder::_current = nullptr; 73 74 ArchiveBuilder::OtherROAllocMark::~OtherROAllocMark() { 75 char* newtop = ArchiveBuilder::current()->_ro_region.top(); 76 ArchiveBuilder::alloc_stats()->record_other_type(int(newtop - _oldtop), true); 77 } 78 79 ArchiveBuilder::SourceObjList::SourceObjList() : _ptrmap(16 * K, mtClassShared) { 80 _total_bytes = 0; 81 _objs = new (mtClassShared) GrowableArray<SourceObjInfo*>(128 * K, mtClassShared); 82 } 83 84 ArchiveBuilder::SourceObjList::~SourceObjList() { 85 delete _objs; 86 } 87 88 void ArchiveBuilder::SourceObjList::append(SourceObjInfo* src_info) { 89 // Save this source object for copying 90 src_info->set_id(_objs->length()); 91 _objs->append(src_info); 92 93 // Prepare for marking the pointers in this source object 94 assert(is_aligned(_total_bytes, sizeof(address)), "must be"); 95 src_info->set_ptrmap_start(_total_bytes / sizeof(address)); 96 _total_bytes = align_up(_total_bytes + (uintx)src_info->size_in_bytes(), sizeof(address)); 97 src_info->set_ptrmap_end(_total_bytes / sizeof(address)); 98 99 BitMap::idx_t bitmap_size_needed = BitMap::idx_t(src_info->ptrmap_end()); 100 if (_ptrmap.size() <= bitmap_size_needed) { 101 _ptrmap.resize((bitmap_size_needed + 1) * 2); 102 } 103 } 104 105 void ArchiveBuilder::SourceObjList::remember_embedded_pointer(SourceObjInfo* src_info, MetaspaceClosure::Ref* ref) { 106 // src_obj contains a pointer. Remember the location of this pointer in _ptrmap, 107 // so that we can copy/relocate it later. 108 src_info->set_has_embedded_pointer(); 109 address src_obj = src_info->source_addr(); 110 address* field_addr = ref->addr(); 111 assert(src_info->ptrmap_start() < _total_bytes, "sanity"); 112 assert(src_info->ptrmap_end() <= _total_bytes, "sanity"); 113 assert(*field_addr != nullptr, "should have checked"); 114 115 intx field_offset_in_bytes = ((address)field_addr) - src_obj; 116 DEBUG_ONLY(int src_obj_size = src_info->size_in_bytes();) 117 assert(field_offset_in_bytes >= 0, "must be"); 118 assert(field_offset_in_bytes + intx(sizeof(intptr_t)) <= intx(src_obj_size), "must be"); 119 assert(is_aligned(field_offset_in_bytes, sizeof(address)), "must be"); 120 121 BitMap::idx_t idx = BitMap::idx_t(src_info->ptrmap_start() + (uintx)(field_offset_in_bytes / sizeof(address))); 122 _ptrmap.set_bit(BitMap::idx_t(idx)); 123 } 124 125 class RelocateEmbeddedPointers : public BitMapClosure { 126 ArchiveBuilder* _builder; 127 address _buffered_obj; 128 BitMap::idx_t _start_idx; 129 public: 130 RelocateEmbeddedPointers(ArchiveBuilder* builder, address buffered_obj, BitMap::idx_t start_idx) : 131 _builder(builder), _buffered_obj(buffered_obj), _start_idx(start_idx) {} 132 133 bool do_bit(BitMap::idx_t bit_offset) { 134 size_t field_offset = size_t(bit_offset - _start_idx) * sizeof(address); 135 address* ptr_loc = (address*)(_buffered_obj + field_offset); 136 137 address old_p_with_tags = *ptr_loc; 138 assert(old_p_with_tags != nullptr, "null ptrs shouldn't have been marked"); 139 140 address old_p = MetaspaceClosure::strip_tags(old_p_with_tags); 141 uintx tags = MetaspaceClosure::decode_tags(old_p_with_tags); 142 address new_p = _builder->get_buffered_addr(old_p); 143 144 bool nulled; 145 if (new_p == nullptr) { 146 // old_p had a FollowMode of set_to_null 147 nulled = true; 148 } else { 149 new_p = MetaspaceClosure::add_tags(new_p, tags); 150 nulled = false; 151 } 152 153 log_trace(aot)("Ref: [" PTR_FORMAT "] -> " PTR_FORMAT " => " PTR_FORMAT " %zu", 154 p2i(ptr_loc), p2i(old_p) + tags, p2i(new_p), tags); 155 156 ArchivePtrMarker::set_and_mark_pointer(ptr_loc, new_p); 157 ArchiveBuilder::current()->count_relocated_pointer(tags != 0, nulled); 158 return true; // keep iterating the bitmap 159 } 160 }; 161 162 void ArchiveBuilder::SourceObjList::relocate(int i, ArchiveBuilder* builder) { 163 SourceObjInfo* src_info = objs()->at(i); 164 assert(src_info->should_copy(), "must be"); 165 BitMap::idx_t start = BitMap::idx_t(src_info->ptrmap_start()); // inclusive 166 BitMap::idx_t end = BitMap::idx_t(src_info->ptrmap_end()); // exclusive 167 168 RelocateEmbeddedPointers relocator(builder, src_info->buffered_addr(), start); 169 _ptrmap.iterate(&relocator, start, end); 170 } 171 172 ArchiveBuilder::ArchiveBuilder() : 173 _current_dump_region(nullptr), 174 _buffer_bottom(nullptr), 175 _requested_static_archive_bottom(nullptr), 176 _requested_static_archive_top(nullptr), 177 _requested_dynamic_archive_bottom(nullptr), 178 _requested_dynamic_archive_top(nullptr), 179 _mapped_static_archive_bottom(nullptr), 180 _mapped_static_archive_top(nullptr), 181 _buffer_to_requested_delta(0), 182 _pz_region("pz"), // protection zone -- used only during dumping; does NOT exist in cds archive. 183 _rw_region("rw"), 184 _ro_region("ro"), 185 _ac_region("ac"), 186 _ptrmap(mtClassShared), 187 _rw_ptrmap(mtClassShared), 188 _ro_ptrmap(mtClassShared), 189 _ac_ptrmap(mtClassShared), 190 _rw_src_objs(), 191 _ro_src_objs(), 192 _src_obj_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE), 193 _buffered_to_src_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE), 194 _total_heap_region_size(0) 195 { 196 _klasses = new (mtClassShared) GrowableArray<Klass*>(4 * K, mtClassShared); 197 _symbols = new (mtClassShared) GrowableArray<Symbol*>(256 * K, mtClassShared); 198 _entropy_seed = 0x12345678; 199 _relocated_ptr_info._num_ptrs = 0; 200 _relocated_ptr_info._num_tagged_ptrs = 0; 201 _relocated_ptr_info._num_nulled_ptrs = 0; 202 assert(_current == nullptr, "must be"); 203 _current = this; 204 } 205 206 ArchiveBuilder::~ArchiveBuilder() { 207 assert(_current == this, "must be"); 208 _current = nullptr; 209 210 for (int i = 0; i < _symbols->length(); i++) { 211 _symbols->at(i)->decrement_refcount(); 212 } 213 214 delete _klasses; 215 delete _symbols; 216 if (_shared_rs.is_reserved()) { 217 MemoryReserver::release(_shared_rs); 218 } 219 220 AOTArtifactFinder::dispose(); 221 } 222 223 // Returns a deterministic sequence of pseudo random numbers. The main purpose is NOT 224 // for randomness but to get good entropy for the identity_hash() of archived Symbols, 225 // while keeping the contents of static CDS archives deterministic to ensure 226 // reproducibility of JDK builds. 227 int ArchiveBuilder::entropy() { 228 assert(SafepointSynchronize::is_at_safepoint(), "needed to ensure deterministic sequence"); 229 _entropy_seed = os::next_random(_entropy_seed); 230 return static_cast<int>(_entropy_seed); 231 } 232 233 class GatherKlassesAndSymbols : public UniqueMetaspaceClosure { 234 ArchiveBuilder* _builder; 235 236 public: 237 GatherKlassesAndSymbols(ArchiveBuilder* builder) : _builder(builder) {} 238 239 virtual bool do_unique_ref(Ref* ref, bool read_only) { 240 return _builder->gather_klass_and_symbol(ref, read_only); 241 } 242 }; 243 244 bool ArchiveBuilder::gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only) { 245 if (ref->obj() == nullptr) { 246 return false; 247 } 248 if (get_follow_mode(ref) != make_a_copy) { 249 return false; 250 } 251 if (ref->type() == MetaspaceClosureType::ClassType) { 252 Klass* klass = (Klass*)ref->obj(); 253 assert(klass->is_klass(), "must be"); 254 if (!is_excluded(klass)) { 255 _klasses->append(klass); 256 if (klass->is_hidden()) { 257 assert(klass->is_instance_klass(), "must be"); 258 } 259 } 260 } else if (ref->type() == MetaspaceClosureType::SymbolType) { 261 // Make sure the symbol won't be GC'ed while we are dumping the archive. 262 Symbol* sym = (Symbol*)ref->obj(); 263 sym->increment_refcount(); 264 _symbols->append(sym); 265 } 266 267 return true; // recurse 268 } 269 270 void ArchiveBuilder::gather_klasses_and_symbols() { 271 ResourceMark rm; 272 273 AOTArtifactFinder::initialize(); 274 AOTArtifactFinder::find_artifacts(); 275 276 aot_log_info(aot)("Gathering classes and symbols ... "); 277 GatherKlassesAndSymbols doit(this); 278 iterate_roots(&doit); 279 doit.finish(); 280 281 if (CDSConfig::is_dumping_static_archive()) { 282 // To ensure deterministic contents in the static archive, we need to ensure that 283 // we iterate the MetaspaceObjs in a deterministic order. It doesn't matter where 284 // the MetaspaceObjs are located originally, as they are copied sequentially into 285 // the archive during the iteration. 286 // 287 // The only issue here is that the symbol table and the system directories may be 288 // randomly ordered, so we copy the symbols and klasses into two arrays and sort 289 // them deterministically. 290 // 291 // During -Xshare:dump, the order of Symbol creation is strictly determined by 292 // the SharedClassListFile (class loading is done in a single thread and the JIT 293 // is disabled). Also, Symbols are allocated in monotonically increasing addresses 294 // (see Symbol::operator new(size_t, int)). So if we iterate the Symbols by 295 // ascending address order, we ensure that all Symbols are copied into deterministic 296 // locations in the archive. 297 // 298 // TODO: in the future, if we want to produce deterministic contents in the 299 // dynamic archive, we might need to sort the symbols alphabetically (also see 300 // DynamicArchiveBuilder::sort_methods()). 301 aot_log_info(aot)("Sorting symbols ... "); 302 _symbols->sort(compare_symbols_by_address); 303 sort_klasses(); 304 } 305 306 AOTClassLinker::add_candidates(); 307 } 308 309 int ArchiveBuilder::compare_symbols_by_address(Symbol** a, Symbol** b) { 310 if (a[0] < b[0]) { 311 return -1; 312 } else { 313 assert(a[0] > b[0], "Duplicated symbol %s unexpected", (*a)->as_C_string()); 314 return 1; 315 } 316 } 317 318 int ArchiveBuilder::compare_klass_by_name(Klass** a, Klass** b) { 319 return a[0]->name()->fast_compare(b[0]->name()); 320 } 321 322 void ArchiveBuilder::sort_klasses() { 323 aot_log_info(aot)("Sorting classes ... "); 324 _klasses->sort(compare_klass_by_name); 325 } 326 327 address ArchiveBuilder::reserve_buffer() { 328 // On 64-bit: reserve address space for archives up to the max encoded offset limit. 329 // On 32-bit: use 256MB + AOT code size due to limited virtual address space. 330 size_t buffer_size = LP64_ONLY(AOTCompressedPointers::MaxMetadataOffsetBytes) 331 NOT_LP64(256 * M + AOTCodeCache::max_aot_code_size()); 332 ReservedSpace rs = MemoryReserver::reserve(buffer_size, 333 AOTMetaspace::core_region_alignment(), 334 os::vm_page_size(), 335 mtNone); 336 if (!rs.is_reserved()) { 337 aot_log_error(aot)("Failed to reserve %zu bytes of output buffer.", buffer_size); 338 AOTMetaspace::unrecoverable_writing_error(); 339 } 340 341 // buffer_bottom is the lowest address of the 2 core regions (rw, ro) when 342 // we are copying the class metadata into the buffer. 343 address buffer_bottom = (address)rs.base(); 344 aot_log_info(aot)("Reserved output buffer space at " PTR_FORMAT " [%zu bytes]", 345 p2i(buffer_bottom), buffer_size); 346 _shared_rs = rs; 347 348 _buffer_bottom = buffer_bottom; 349 350 if (CDSConfig::is_dumping_static_archive()) { 351 _current_dump_region = &_pz_region; 352 } else { 353 _current_dump_region = &_rw_region; 354 } 355 _current_dump_region->init(&_shared_rs, &_shared_vs); 356 357 ArchivePtrMarker::initialize(&_ptrmap, &_shared_vs); 358 359 // The bottom of the static archive should be mapped at this address by default. 360 _requested_static_archive_bottom = (address)AOTMetaspace::requested_base_address(); 361 362 // The bottom of the archive (that I am writing now) should be mapped at this address by default. 363 address my_archive_requested_bottom; 364 365 if (CDSConfig::is_dumping_static_archive()) { 366 my_archive_requested_bottom = _requested_static_archive_bottom; 367 } else { 368 _mapped_static_archive_bottom = (address)MetaspaceObj::aot_metaspace_base(); 369 _mapped_static_archive_top = (address)MetaspaceObj::aot_metaspace_top(); 370 assert(_mapped_static_archive_top >= _mapped_static_archive_bottom, "must be"); 371 size_t static_archive_size = _mapped_static_archive_top - _mapped_static_archive_bottom; 372 373 // At run time, we will mmap the dynamic archive at my_archive_requested_bottom 374 _requested_static_archive_top = _requested_static_archive_bottom + static_archive_size; 375 my_archive_requested_bottom = align_up(_requested_static_archive_top, AOTMetaspace::core_region_alignment()); 376 377 _requested_dynamic_archive_bottom = my_archive_requested_bottom; 378 } 379 380 _buffer_to_requested_delta = my_archive_requested_bottom - _buffer_bottom; 381 382 address my_archive_requested_top = my_archive_requested_bottom + buffer_size; 383 if (my_archive_requested_bottom < _requested_static_archive_bottom || 384 my_archive_requested_top <= _requested_static_archive_bottom) { 385 // Size overflow. 386 aot_log_error(aot)("my_archive_requested_bottom = " INTPTR_FORMAT, p2i(my_archive_requested_bottom)); 387 aot_log_error(aot)("my_archive_requested_top = " INTPTR_FORMAT, p2i(my_archive_requested_top)); 388 aot_log_error(aot)("SharedBaseAddress (" INTPTR_FORMAT ") is too high. " 389 "Please rerun java -Xshare:dump with a lower value", p2i(_requested_static_archive_bottom)); 390 AOTMetaspace::unrecoverable_writing_error(); 391 } 392 393 if (CDSConfig::is_dumping_static_archive()) { 394 // We don't want any valid object to be at the very bottom of the archive. 395 // See ArchivePtrMarker::mark_pointer(). 396 _pz_region.allocate(AOTMetaspace::protection_zone_size()); 397 start_dump_region(&_rw_region); 398 } 399 400 return buffer_bottom; 401 } 402 403 void ArchiveBuilder::iterate_sorted_roots(MetaspaceClosure* it) { 404 int num_symbols = _symbols->length(); 405 for (int i = 0; i < num_symbols; i++) { 406 it->push(_symbols->adr_at(i)); 407 } 408 409 int num_klasses = _klasses->length(); 410 for (int i = 0; i < num_klasses; i++) { 411 it->push(_klasses->adr_at(i)); 412 } 413 414 iterate_roots(it); 415 } 416 417 class GatherSortedSourceObjs : public MetaspaceClosure { 418 ArchiveBuilder* _builder; 419 420 public: 421 GatherSortedSourceObjs(ArchiveBuilder* builder) : _builder(builder) {} 422 423 virtual bool do_ref(Ref* ref, bool read_only) { 424 return _builder->gather_one_source_obj(ref, read_only); 425 } 426 }; 427 428 bool ArchiveBuilder::gather_one_source_obj(MetaspaceClosure::Ref* ref, bool read_only) { 429 address src_obj = ref->obj(); 430 if (src_obj == nullptr) { 431 return false; 432 } 433 434 remember_embedded_pointer_in_enclosing_obj(ref); 435 if (RegeneratedClasses::has_been_regenerated(src_obj)) { 436 // No need to copy it. We will later relocate it to point to the regenerated klass/method. 437 return false; 438 } 439 440 FollowMode follow_mode = get_follow_mode(ref); 441 SourceObjInfo src_info(ref, read_only, follow_mode); 442 bool created; 443 SourceObjInfo* p = _src_obj_table.put_if_absent(src_obj, src_info, &created); 444 if (created) { 445 if (_src_obj_table.maybe_grow()) { 446 log_info(aot, hashtables)("Expanded _src_obj_table table to %d", _src_obj_table.table_size()); 447 } 448 } 449 450 #ifdef ASSERT 451 if (ref->type() == MetaspaceClosureType::MethodType) { 452 Method* m = (Method*)ref->obj(); 453 assert(!RegeneratedClasses::has_been_regenerated((address)m->method_holder()), 454 "Should not archive methods in a class that has been regenerated"); 455 } 456 #endif 457 458 if (ref->type() == MetaspaceClosureType::MethodDataType) { 459 MethodData* md = (MethodData*)ref->obj(); 460 md->clean_method_data(false /* always_clean */); 461 } 462 463 assert(p->read_only() == src_info.read_only(), "must be"); 464 465 if (created && src_info.should_copy()) { 466 if (read_only) { 467 _ro_src_objs.append(p); 468 } else { 469 _rw_src_objs.append(p); 470 } 471 return true; // Need to recurse into this ref only if we are copying it 472 } else { 473 return false; 474 } 475 } 476 477 void ArchiveBuilder::record_regenerated_object(address orig_src_obj, address regen_src_obj) { 478 // Record the fact that orig_src_obj has been replaced by regen_src_obj. All calls to get_buffered_addr(orig_src_obj) 479 // should return the same value as get_buffered_addr(regen_src_obj). 480 SourceObjInfo* p = _src_obj_table.get(regen_src_obj); 481 assert(p != nullptr, "regenerated object should always be dumped"); 482 SourceObjInfo orig_src_info(orig_src_obj, p); 483 bool created; 484 _src_obj_table.put_if_absent(orig_src_obj, orig_src_info, &created); 485 assert(created, "We shouldn't have archived the original copy of a regenerated object"); 486 } 487 488 // Remember that we have a pointer inside ref->enclosing_obj() that points to ref->obj() 489 void ArchiveBuilder::remember_embedded_pointer_in_enclosing_obj(MetaspaceClosure::Ref* ref) { 490 assert(ref->obj() != nullptr, "should have checked"); 491 492 address enclosing_obj = ref->enclosing_obj(); 493 if (enclosing_obj == nullptr) { 494 return; 495 } 496 497 // We are dealing with 3 addresses: 498 // address o = ref->obj(): We have found an object whose address is o. 499 // address* mpp = ref->mpp(): The object o is pointed to by a pointer whose address is mpp. 500 // I.e., (*mpp == o) 501 // enclosing_obj : If non-null, it is the object which has a field that points to o. 502 // mpp is the address if that field. 503 // 504 // Example: We have an array whose first element points to a Method: 505 // Method* o = 0x0000abcd; 506 // Array<Method*>* enclosing_obj = 0x00001000; 507 // enclosing_obj->at_put(0, o); 508 // 509 // We the MetaspaceClosure iterates on the very first element of this array, we have 510 // ref->obj() == 0x0000abcd (the Method) 511 // ref->mpp() == 0x00001008 (the location of the first element in the array) 512 // ref->enclosing_obj() == 0x00001000 (the Array that contains the Method) 513 // 514 // We use the above information to mark the bitmap to indicate that there's a pointer on address 0x00001008. 515 SourceObjInfo* src_info = _src_obj_table.get(enclosing_obj); 516 if (src_info == nullptr || !src_info->should_copy()) { 517 // source objects of point_to_it/set_to_null types are not copied 518 // so we don't need to remember their pointers. 519 } else { 520 if (src_info->read_only()) { 521 _ro_src_objs.remember_embedded_pointer(src_info, ref); 522 } else { 523 _rw_src_objs.remember_embedded_pointer(src_info, ref); 524 } 525 } 526 } 527 528 void ArchiveBuilder::gather_source_objs() { 529 ResourceMark rm; 530 aot_log_info(aot)("Gathering all archivable objects ... "); 531 gather_klasses_and_symbols(); 532 GatherSortedSourceObjs doit(this); 533 iterate_sorted_roots(&doit); 534 doit.finish(); 535 } 536 537 bool ArchiveBuilder::is_excluded(Klass* klass) { 538 if (klass->is_instance_klass()) { 539 InstanceKlass* ik = InstanceKlass::cast(klass); 540 return SystemDictionaryShared::is_excluded_class(ik); 541 } else if (klass->is_objArray_klass()) { 542 Klass* bottom = ObjArrayKlass::cast(klass)->bottom_klass(); 543 if (CDSConfig::is_dumping_dynamic_archive() && AOTMetaspace::in_aot_cache_static_region(bottom)) { 544 // The bottom class is in the static archive so it's clearly not excluded. 545 return false; 546 } else if (bottom->is_instance_klass()) { 547 return SystemDictionaryShared::is_excluded_class(InstanceKlass::cast(bottom)); 548 } 549 } 550 551 return false; 552 } 553 554 ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref *ref) { 555 address obj = ref->obj(); 556 if (CDSConfig::is_dumping_dynamic_archive() && AOTMetaspace::in_aot_cache(obj)) { 557 // Don't dump existing shared metadata again. 558 return point_to_it; 559 } else if (ref->type() == MetaspaceClosureType::MethodDataType || 560 ref->type() == MetaspaceClosureType::MethodCountersType || 561 ref->type() == MetaspaceClosureType::KlassTrainingDataType || 562 ref->type() == MetaspaceClosureType::MethodTrainingDataType || 563 ref->type() == MetaspaceClosureType::CompileTrainingDataType) { 564 return (TrainingData::need_data() || TrainingData::assembling_data()) ? make_a_copy : set_to_null; 565 } else if (ref->type() == MetaspaceClosureType::AdapterHandlerEntryType) { 566 return CDSConfig::is_dumping_adapters() ? make_a_copy : set_to_null; 567 } else { 568 if (ref->type() == MetaspaceClosureType::ClassType) { 569 Klass* klass = (Klass*)ref->obj(); 570 assert(klass->is_klass(), "must be"); 571 if (RegeneratedClasses::has_been_regenerated(klass)) { 572 klass = RegeneratedClasses::get_regenerated_object(klass); 573 } 574 if (is_excluded(klass)) { 575 ResourceMark rm; 576 aot_log_trace(aot)("pointer set to null: class (excluded): %s", klass->external_name()); 577 return set_to_null; 578 } 579 if (klass->is_array_klass() && CDSConfig::is_dumping_dynamic_archive()) { 580 ResourceMark rm; 581 aot_log_trace(aot)("pointer set to null: array class not supported in dynamic region: %s", klass->external_name()); 582 return set_to_null; 583 } 584 } 585 586 return make_a_copy; 587 } 588 } 589 590 void ArchiveBuilder::start_dump_region(DumpRegion* next) { 591 current_dump_region()->pack(next); 592 _current_dump_region = next; 593 } 594 595 char* ArchiveBuilder::ro_strdup(const char* s) { 596 char* archived_str = ro_region_alloc((int)strlen(s) + 1); 597 strcpy(archived_str, s); 598 return archived_str; 599 } 600 601 // The objects that have embedded pointers will sink 602 // towards the end of the list. This ensures we have a maximum 603 // number of leading zero bits in the relocation bitmap. 604 int ArchiveBuilder::compare_src_objs(SourceObjInfo** a, SourceObjInfo** b) { 605 if ((*a)->has_embedded_pointer() && !(*b)->has_embedded_pointer()) { 606 return 1; 607 } else if (!(*a)->has_embedded_pointer() && (*b)->has_embedded_pointer()) { 608 return -1; 609 } else { 610 // This is necessary to keep the sorting order stable. Otherwise the 611 // archive's contents may not be deterministic. 612 return (*a)->id() - (*b)->id(); 613 } 614 } 615 616 void ArchiveBuilder::sort_metadata_objs() { 617 _rw_src_objs.objs()->sort(compare_src_objs); 618 _ro_src_objs.objs()->sort(compare_src_objs); 619 } 620 621 void ArchiveBuilder::dump_rw_metadata() { 622 ResourceMark rm; 623 aot_log_info(aot)("Allocating RW objects ... "); 624 make_shallow_copies(&_rw_region, &_rw_src_objs); 625 } 626 627 void ArchiveBuilder::dump_ro_metadata() { 628 ResourceMark rm; 629 aot_log_info(aot)("Allocating RO objects ... "); 630 631 start_dump_region(&_ro_region); 632 make_shallow_copies(&_ro_region, &_ro_src_objs); 633 RegeneratedClasses::record_regenerated_objects(); 634 DumpRegion::report_gaps(&_alloc_stats); 635 } 636 637 void ArchiveBuilder::make_shallow_copies(DumpRegion *dump_region, 638 const ArchiveBuilder::SourceObjList* src_objs) { 639 for (int i = 0; i < src_objs->objs()->length(); i++) { 640 make_shallow_copy(dump_region, src_objs->objs()->at(i)); 641 } 642 aot_log_info(aot)("done (%d objects)", src_objs->objs()->length()); 643 } 644 645 void ArchiveBuilder::make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info) { 646 address src = src_info->source_addr(); 647 int bytes = src_info->size_in_bytes(); 648 char* dest = dump_region->allocate_metaspace_obj(bytes, src, src_info->type(), 649 src_info->read_only(), &_alloc_stats); 650 651 memcpy(dest, src, bytes); 652 653 // Update the hash of buffered sorted symbols for static dump so that the symbols have deterministic contents 654 if (CDSConfig::is_dumping_static_archive() && (src_info->type() == MetaspaceClosureType::SymbolType)) { 655 Symbol* buffered_symbol = (Symbol*)dest; 656 assert(((Symbol*)src)->is_permanent(), "archived symbols must be permanent"); 657 buffered_symbol->update_identity_hash(); 658 } 659 660 { 661 bool created; 662 _buffered_to_src_table.put_if_absent((address)dest, src, &created); 663 assert(created, "must be"); 664 if (_buffered_to_src_table.maybe_grow()) { 665 log_info(aot, hashtables)("Expanded _buffered_to_src_table table to %d", _buffered_to_src_table.table_size()); 666 } 667 } 668 669 intptr_t* archived_vtable = CppVtables::get_archived_vtable(src_info->type(), (address)dest); 670 if (archived_vtable != nullptr) { 671 *(address*)dest = (address)archived_vtable; 672 ArchivePtrMarker::mark_pointer((address*)dest); 673 } 674 675 log_trace(aot)("Copy: " PTR_FORMAT " ==> " PTR_FORMAT " %d", p2i(src), p2i(dest), bytes); 676 src_info->set_buffered_addr((address)dest); 677 } 678 679 // This is used by code that hand-assembles data structures, such as the LambdaProxyClassKey, that are 680 // not handled by MetaspaceClosure. 681 void ArchiveBuilder::write_pointer_in_buffer(address* ptr_location, address src_addr) { 682 assert(is_in_buffer_space(ptr_location), "must be"); 683 if (src_addr == nullptr) { 684 *ptr_location = nullptr; 685 ArchivePtrMarker::clear_pointer(ptr_location); 686 } else { 687 *ptr_location = get_buffered_addr(src_addr); 688 ArchivePtrMarker::mark_pointer(ptr_location); 689 } 690 } 691 692 void ArchiveBuilder::mark_and_relocate_to_buffered_addr(address* ptr_location) { 693 assert(*ptr_location != nullptr, "sanity"); 694 if (!is_in_mapped_static_archive(*ptr_location)) { 695 *ptr_location = get_buffered_addr(*ptr_location); 696 } 697 ArchivePtrMarker::mark_pointer(ptr_location); 698 } 699 700 bool ArchiveBuilder::has_been_archived(address src_addr) const { 701 SourceObjInfo* p = _src_obj_table.get(src_addr); 702 if (p == nullptr) { 703 // This object has never been seen by ArchiveBuilder 704 return false; 705 } 706 if (p->buffered_addr() == nullptr) { 707 // ArchiveBuilder has seen this object, but decided not to archive it. So 708 // Any reference to this object will be modified to nullptr inside the buffer. 709 assert(p->follow_mode() == set_to_null, "must be"); 710 return false; 711 } 712 713 DEBUG_ONLY({ 714 // This is a class/method that belongs to one of the "original" classes that 715 // have been regenerated by lambdaFormInvokers.cpp. We must have archived 716 // the "regenerated" version of it. 717 if (RegeneratedClasses::has_been_regenerated(src_addr)) { 718 address regen_obj = RegeneratedClasses::get_regenerated_object(src_addr); 719 precond(regen_obj != nullptr && regen_obj != src_addr); 720 assert(has_been_archived(regen_obj), "must be"); 721 assert(get_buffered_addr(src_addr) == get_buffered_addr(regen_obj), "must be"); 722 }}); 723 724 return true; 725 } 726 727 address ArchiveBuilder::get_buffered_addr(address src_addr) const { 728 SourceObjInfo* p = _src_obj_table.get(src_addr); 729 assert(p != nullptr, "src_addr " INTPTR_FORMAT " is used but has not been archived", 730 p2i(src_addr)); 731 732 return p->buffered_addr(); 733 } 734 735 address ArchiveBuilder::get_source_addr(address buffered_addr) const { 736 assert(is_in_buffer_space(buffered_addr), "must be"); 737 address* src_p = _buffered_to_src_table.get(buffered_addr); 738 assert(src_p != nullptr && *src_p != nullptr, "must be"); 739 return *src_p; 740 } 741 742 void ArchiveBuilder::relocate_embedded_pointers(ArchiveBuilder::SourceObjList* src_objs) { 743 for (int i = 0; i < src_objs->objs()->length(); i++) { 744 src_objs->relocate(i, this); 745 } 746 } 747 748 void ArchiveBuilder::relocate_metaspaceobj_embedded_pointers() { 749 aot_log_info(aot)("Relocating embedded pointers in core regions ... "); 750 relocate_embedded_pointers(&_rw_src_objs); 751 relocate_embedded_pointers(&_ro_src_objs); 752 log_info(cds)("Relocating %zu pointers, %zu tagged, %zu nulled", 753 _relocated_ptr_info._num_ptrs, 754 _relocated_ptr_info._num_tagged_ptrs, 755 _relocated_ptr_info._num_nulled_ptrs); 756 } 757 758 #define ADD_COUNT(x) \ 759 x += 1; \ 760 x ## _a += aotlinked ? 1 : 0; \ 761 x ## _i += inited ? 1 : 0; 762 763 #define DECLARE_INSTANCE_KLASS_COUNTER(x) \ 764 int x = 0; \ 765 int x ## _a = 0; \ 766 int x ## _i = 0; 767 768 void ArchiveBuilder::make_klasses_shareable() { 769 DECLARE_INSTANCE_KLASS_COUNTER(num_instance_klasses); 770 DECLARE_INSTANCE_KLASS_COUNTER(num_boot_klasses); 771 DECLARE_INSTANCE_KLASS_COUNTER(num_vm_klasses); 772 DECLARE_INSTANCE_KLASS_COUNTER(num_platform_klasses); 773 DECLARE_INSTANCE_KLASS_COUNTER(num_app_klasses); 774 DECLARE_INSTANCE_KLASS_COUNTER(num_old_klasses); 775 DECLARE_INSTANCE_KLASS_COUNTER(num_hidden_klasses); 776 DECLARE_INSTANCE_KLASS_COUNTER(num_enum_klasses); 777 DECLARE_INSTANCE_KLASS_COUNTER(num_unregistered_klasses); 778 int num_unlinked_klasses = 0; 779 int num_obj_array_klasses = 0; 780 int num_type_array_klasses = 0; 781 782 int boot_unlinked = 0; 783 int platform_unlinked = 0; 784 int app_unlinked = 0; 785 int unreg_unlinked = 0; 786 787 for (int i = 0; i < klasses()->length(); i++) { 788 // Some of the code in ConstantPool::remove_unshareable_info() requires the classes 789 // to be in linked state, so it must be call here before the next loop, which returns 790 // all classes to unlinked state. 791 Klass* k = get_buffered_addr(klasses()->at(i)); 792 if (k->is_instance_klass()) { 793 InstanceKlass::cast(k)->constants()->remove_unshareable_info(); 794 } 795 } 796 797 for (int i = 0; i < klasses()->length(); i++) { 798 const char* type; 799 const char* unlinked = ""; 800 const char* kind = ""; 801 const char* hidden = ""; 802 const char* old = ""; 803 const char* generated = ""; 804 const char* aotlinked_msg = ""; 805 const char* inited_msg = ""; 806 const char* early_init_msg = ""; 807 Klass* k = get_buffered_addr(klasses()->at(i)); 808 bool inited = false; 809 k->remove_java_mirror(); 810 #ifdef _LP64 811 if (UseCompactObjectHeaders) { 812 Klass* requested_k = to_requested(k); 813 address narrow_klass_base = _requested_static_archive_bottom; // runtime encoding base == runtime mapping start 814 const int narrow_klass_shift = precomputed_narrow_klass_shift(); 815 narrowKlass nk = CompressedKlassPointers::encode_not_null_without_asserts(requested_k, narrow_klass_base, narrow_klass_shift); 816 k->set_prototype_header(markWord::prototype().set_narrow_klass(nk)); 817 } 818 #endif //_LP64 819 if (k->is_objArray_klass()) { 820 // InstanceKlass and TypeArrayKlass will in turn call remove_unshareable_info 821 // on their array classes. 822 num_obj_array_klasses ++; 823 type = "array"; 824 } else if (k->is_typeArray_klass()) { 825 num_type_array_klasses ++; 826 type = "array"; 827 k->remove_unshareable_info(); 828 } else { 829 assert(k->is_instance_klass(), " must be"); 830 InstanceKlass* ik = InstanceKlass::cast(k); 831 InstanceKlass* src_ik = get_source_addr(ik); 832 bool aotlinked = AOTClassLinker::is_candidate(src_ik); 833 inited = ik->has_aot_initialized_mirror(); 834 ADD_COUNT(num_instance_klasses); 835 if (ik->is_hidden()) { 836 ADD_COUNT(num_hidden_klasses); 837 hidden = " hidden"; 838 oop loader = k->class_loader(); 839 if (loader == nullptr) { 840 type = "boot"; 841 ADD_COUNT(num_boot_klasses); 842 } else if (loader == SystemDictionary::java_platform_loader()) { 843 type = "plat"; 844 ADD_COUNT(num_platform_klasses); 845 } else if (loader == SystemDictionary::java_system_loader()) { 846 type = "app"; 847 ADD_COUNT(num_app_klasses); 848 } else { 849 type = "bad"; 850 assert(0, "shouldn't happen"); 851 } 852 if (CDSConfig::is_dumping_method_handles()) { 853 assert(HeapShared::is_archivable_hidden_klass(ik), "sanity"); 854 } else { 855 // Legacy CDS support for lambda proxies 856 CDS_JAVA_HEAP_ONLY(assert(HeapShared::is_lambda_proxy_klass(ik), "sanity");) 857 } 858 } else if (ik->defined_by_boot_loader()) { 859 type = "boot"; 860 ADD_COUNT(num_boot_klasses); 861 } else if (ik->defined_by_platform_loader()) { 862 type = "plat"; 863 ADD_COUNT(num_platform_klasses); 864 } else if (ik->defined_by_app_loader()) { 865 type = "app"; 866 ADD_COUNT(num_app_klasses); 867 } else { 868 assert(ik->defined_by_other_loaders(), "must be"); 869 type = "unreg"; 870 ADD_COUNT(num_unregistered_klasses); 871 } 872 873 if (AOTClassLinker::is_vm_class(src_ik)) { 874 ADD_COUNT(num_vm_klasses); 875 } 876 877 if (!ik->is_linked()) { 878 num_unlinked_klasses ++; 879 unlinked = " unlinked"; 880 if (ik->defined_by_boot_loader()) { 881 boot_unlinked ++; 882 } else if (ik->defined_by_platform_loader()) { 883 platform_unlinked ++; 884 } else if (ik->defined_by_app_loader()) { 885 app_unlinked ++; 886 } else { 887 unreg_unlinked ++; 888 } 889 } 890 891 if (ik->is_interface()) { 892 kind = " interface"; 893 } else if (src_ik->is_enum_subclass()) { 894 kind = " enum"; 895 ADD_COUNT(num_enum_klasses); 896 } 897 898 if (CDSConfig::is_old_class_for_verifier(ik)) { 899 ADD_COUNT(num_old_klasses); 900 old = " old"; 901 } 902 903 if (ik->is_aot_generated_class()) { 904 generated = " generated"; 905 } 906 if (aotlinked) { 907 aotlinked_msg = " aot-linked"; 908 } 909 if (inited) { 910 if (InstanceKlass::cast(k)->static_field_size() == 0) { 911 inited_msg = " inited (no static fields)"; 912 } else { 913 inited_msg = " inited"; 914 } 915 if (AOTCacheAccess::is_early_aot_inited_class(ik)) { 916 early_init_msg = " early"; 917 } 918 } 919 920 AOTMetaspace::rewrite_bytecodes_and_calculate_fingerprints(Thread::current(), ik); 921 ik->remove_unshareable_info(); 922 } 923 924 if (aot_log_is_enabled(Debug, aot, class)) { 925 ResourceMark rm; 926 aot_log_debug(aot, class)("klasses[%5d] = " PTR_FORMAT " %-5s %s%s%s%s%s%s%s%s%s", i, 927 p2i(to_requested(k)), type, k->external_name(), 928 kind, hidden, old, unlinked, generated, aotlinked_msg, early_init_msg, inited_msg); 929 } 930 } 931 932 #define STATS_FORMAT "= %5d, aot-linked = %5d, inited = %5d" 933 #define STATS_PARAMS(x) num_ ## x, num_ ## x ## _a, num_ ## x ## _i 934 935 aot_log_info(aot)("Number of classes %d", num_instance_klasses + num_obj_array_klasses + num_type_array_klasses); 936 aot_log_info(aot)(" instance classes " STATS_FORMAT, STATS_PARAMS(instance_klasses)); 937 aot_log_info(aot)(" boot " STATS_FORMAT, STATS_PARAMS(boot_klasses)); 938 aot_log_info(aot)(" vm " STATS_FORMAT, STATS_PARAMS(vm_klasses)); 939 aot_log_info(aot)(" platform " STATS_FORMAT, STATS_PARAMS(platform_klasses)); 940 aot_log_info(aot)(" app " STATS_FORMAT, STATS_PARAMS(app_klasses)); 941 aot_log_info(aot)(" unregistered " STATS_FORMAT, STATS_PARAMS(unregistered_klasses)); 942 aot_log_info(aot)(" (enum) " STATS_FORMAT, STATS_PARAMS(enum_klasses)); 943 aot_log_info(aot)(" (hidden) " STATS_FORMAT, STATS_PARAMS(hidden_klasses)); 944 aot_log_info(aot)(" (old) " STATS_FORMAT, STATS_PARAMS(old_klasses)); 945 aot_log_info(aot)(" (unlinked) = %5d, boot = %d, plat = %d, app = %d, unreg = %d", 946 num_unlinked_klasses, boot_unlinked, platform_unlinked, app_unlinked, unreg_unlinked); 947 aot_log_info(aot)(" obj array classes = %5d", num_obj_array_klasses); 948 aot_log_info(aot)(" type array classes = %5d", num_type_array_klasses); 949 aot_log_info(aot)(" symbols = %5d", _symbols->length()); 950 951 #undef STATS_FORMAT 952 #undef STATS_PARAMS 953 } 954 955 void ArchiveBuilder::make_training_data_shareable() { 956 auto clean_td = [&] (address& src_obj, SourceObjInfo& info) { 957 if (!is_in_buffer_space(info.buffered_addr())) { 958 return; 959 } 960 961 if (info.type() == MetaspaceClosureType::KlassTrainingDataType || 962 info.type() == MetaspaceClosureType::MethodTrainingDataType || 963 info.type() == MetaspaceClosureType::CompileTrainingDataType) { 964 TrainingData* buffered_td = (TrainingData*)info.buffered_addr(); 965 buffered_td->remove_unshareable_info(); 966 } else if (info.type() == MetaspaceClosureType::MethodDataType) { 967 MethodData* buffered_mdo = (MethodData*)info.buffered_addr(); 968 buffered_mdo->remove_unshareable_info(); 969 } else if (info.type() == MetaspaceClosureType::MethodCountersType) { 970 MethodCounters* buffered_mc = (MethodCounters*)info.buffered_addr(); 971 buffered_mc->remove_unshareable_info(); 972 } 973 }; 974 _src_obj_table.iterate_all(clean_td); 975 } 976 977 size_t ArchiveBuilder::buffer_to_offset(address p) const { 978 address requested_p = to_requested(p); 979 return pointer_delta(requested_p, _requested_static_archive_bottom, 1); 980 } 981 982 size_t ArchiveBuilder::any_to_offset(address p) const { 983 if (is_in_mapped_static_archive(p)) { 984 assert(CDSConfig::is_dumping_dynamic_archive(), "must be"); 985 return pointer_delta(p, _mapped_static_archive_bottom, 1); 986 } 987 if (!is_in_buffer_space(p)) { 988 // p must be a "source" address 989 p = get_buffered_addr(p); 990 } 991 return buffer_to_offset(p); 992 } 993 994 address ArchiveBuilder::offset_to_buffered_address(size_t offset) const { 995 address requested_addr = _requested_static_archive_bottom + offset; 996 address buffered_addr = requested_addr - _buffer_to_requested_delta; 997 assert(is_in_buffer_space(buffered_addr), "bad offset"); 998 return buffered_addr; 999 } 1000 1001 void ArchiveBuilder::start_ac_region() { 1002 ro_region()->pack(); 1003 start_dump_region(&_ac_region); 1004 } 1005 1006 void ArchiveBuilder::end_ac_region() { 1007 _ac_region.pack(); 1008 } 1009 1010 #if INCLUDE_CDS_JAVA_HEAP 1011 narrowKlass ArchiveBuilder::get_requested_narrow_klass(Klass* k) { 1012 assert(CDSConfig::is_dumping_heap(), "sanity"); 1013 k = get_buffered_klass(k); 1014 Klass* requested_k = to_requested(k); 1015 const int narrow_klass_shift = ArchiveBuilder::precomputed_narrow_klass_shift(); 1016 #ifdef ASSERT 1017 const size_t klass_alignment = MAX2(SharedSpaceObjectAlignment, (size_t)nth_bit(narrow_klass_shift)); 1018 assert(is_aligned(k, klass_alignment), "Klass " PTR_FORMAT " misaligned.", p2i(k)); 1019 #endif 1020 address narrow_klass_base = _requested_static_archive_bottom; // runtime encoding base == runtime mapping start 1021 // Note: use the "raw" version of encode that takes explicit narrow klass base and shift. Don't use any 1022 // of the variants that do sanity checks, nor any of those that use the current - dump - JVM's encoding setting. 1023 return CompressedKlassPointers::encode_not_null_without_asserts(requested_k, narrow_klass_base, narrow_klass_shift); 1024 } 1025 #endif // INCLUDE_CDS_JAVA_HEAP 1026 1027 // RelocateBufferToRequested --- Relocate all the pointers in rw/ro, 1028 // so that the archive can be mapped to the "requested" location without runtime relocation. 1029 // 1030 // - See ArchiveBuilder header for the definition of "buffer", "mapped" and "requested" 1031 // - ArchivePtrMarker::ptrmap() marks all the pointers in the rw/ro regions 1032 // - Every pointer must have one of the following values: 1033 // [a] nullptr: 1034 // No relocation is needed. Remove this pointer from ptrmap so we don't need to 1035 // consider it at runtime. 1036 // [b] Points into an object X which is inside the buffer: 1037 // Adjust this pointer by _buffer_to_requested_delta, so it points to X 1038 // when the archive is mapped at the requested location. 1039 // [c] Points into an object Y which is inside mapped static archive: 1040 // - This happens only during dynamic dump 1041 // - Adjust this pointer by _mapped_to_requested_static_archive_delta, 1042 // so it points to Y when the static archive is mapped at the requested location. 1043 template <bool STATIC_DUMP> 1044 class RelocateBufferToRequested : public BitMapClosure { 1045 ArchiveBuilder* _builder; 1046 address _buffer_bottom; 1047 intx _buffer_to_requested_delta; 1048 intx _mapped_to_requested_static_archive_delta; 1049 size_t _max_non_null_offset; 1050 1051 public: 1052 RelocateBufferToRequested(ArchiveBuilder* builder) { 1053 _builder = builder; 1054 _buffer_bottom = _builder->buffer_bottom(); 1055 _buffer_to_requested_delta = builder->buffer_to_requested_delta(); 1056 _mapped_to_requested_static_archive_delta = builder->requested_static_archive_bottom() - builder->mapped_static_archive_bottom(); 1057 _max_non_null_offset = 0; 1058 1059 address bottom = _builder->buffer_bottom(); 1060 address top = _builder->buffer_top(); 1061 address new_bottom = bottom + _buffer_to_requested_delta; 1062 address new_top = top + _buffer_to_requested_delta; 1063 aot_log_debug(aot)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT "] to " 1064 "[" INTPTR_FORMAT " - " INTPTR_FORMAT "]", 1065 p2i(bottom), p2i(top), 1066 p2i(new_bottom), p2i(new_top)); 1067 } 1068 1069 bool do_bit(size_t offset) { 1070 address* p = (address*)_buffer_bottom + offset; 1071 assert(_builder->is_in_buffer_space(p), "pointer must live in buffer space"); 1072 1073 if (*p == nullptr) { 1074 // todo -- clear bit, etc 1075 ArchivePtrMarker::ptrmap()->clear_bit(offset); 1076 } else { 1077 if (STATIC_DUMP) { 1078 assert(_builder->is_in_buffer_space(*p), "old pointer must point inside buffer space"); 1079 *p += _buffer_to_requested_delta; 1080 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive"); 1081 } else { 1082 if (_builder->is_in_buffer_space(*p)) { 1083 *p += _buffer_to_requested_delta; 1084 // assert is in requested dynamic archive 1085 } else { 1086 assert(_builder->is_in_mapped_static_archive(*p), "old pointer must point inside buffer space or mapped static archive"); 1087 *p += _mapped_to_requested_static_archive_delta; 1088 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive"); 1089 } 1090 } 1091 _max_non_null_offset = offset; 1092 } 1093 1094 return true; // keep iterating 1095 } 1096 1097 void doit() { 1098 ArchivePtrMarker::ptrmap()->iterate(this); 1099 ArchivePtrMarker::compact(_max_non_null_offset); 1100 } 1101 }; 1102 1103 #ifdef _LP64 1104 int ArchiveBuilder::precomputed_narrow_klass_shift() { 1105 // Legacy Mode: 1106 // We use 32 bits for narrowKlass, which should cover the full 4G Klass range. Shift can be 0. 1107 // CompactObjectHeader Mode: 1108 // narrowKlass is much smaller, and we use the highest possible shift value to later get the maximum 1109 // Klass encoding range. 1110 // 1111 // Note that all of this may change in the future, if we decide to correct the pre-calculated 1112 // narrow Klass IDs at archive load time. 1113 assert(UseCompressedClassPointers, "Only needed for compressed class pointers"); 1114 return UseCompactObjectHeaders ? CompressedKlassPointers::max_shift() : 0; 1115 } 1116 #endif // _LP64 1117 1118 void ArchiveBuilder::relocate_to_requested() { 1119 if (!ro_region()->is_packed()) { 1120 ro_region()->pack(); 1121 } 1122 size_t my_archive_size = buffer_top() - buffer_bottom(); 1123 1124 if (CDSConfig::is_dumping_static_archive()) { 1125 _requested_static_archive_top = _requested_static_archive_bottom + my_archive_size; 1126 RelocateBufferToRequested<true> patcher(this); 1127 patcher.doit(); 1128 } else { 1129 assert(CDSConfig::is_dumping_dynamic_archive(), "must be"); 1130 _requested_dynamic_archive_top = _requested_dynamic_archive_bottom + my_archive_size; 1131 RelocateBufferToRequested<false> patcher(this); 1132 patcher.doit(); 1133 } 1134 } 1135 1136 void ArchiveBuilder::print_stats() { 1137 _alloc_stats.print_stats(int(_ro_region.used()), int(_rw_region.used())); 1138 } 1139 1140 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo, AOTMappedHeapInfo* mapped_heap_info, AOTStreamedHeapInfo* streamed_heap_info) { 1141 // Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with 1142 // AOTMetaspace::n_regions (internal to hotspot). 1143 assert(NUM_CDS_REGIONS == AOTMetaspace::n_regions, "sanity"); 1144 1145 ResourceMark rm; 1146 1147 write_region(mapinfo, AOTMetaspace::rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false); 1148 write_region(mapinfo, AOTMetaspace::ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false); 1149 write_region(mapinfo, AOTMetaspace::ac, &_ac_region, /*read_only=*/false,/*allow_exec=*/false); 1150 1151 // Split pointer map into read-write and read-only bitmaps 1152 ArchivePtrMarker::initialize_rw_ro_ac_maps(&_rw_ptrmap, &_ro_ptrmap, &_ac_ptrmap); 1153 1154 size_t bitmap_size_in_bytes; 1155 char* bitmap = mapinfo->write_bitmap_region(ArchivePtrMarker::rw_ptrmap(), 1156 ArchivePtrMarker::ro_ptrmap(), 1157 ArchivePtrMarker::ac_ptrmap(), 1158 mapped_heap_info, 1159 streamed_heap_info, 1160 bitmap_size_in_bytes); 1161 1162 if (mapped_heap_info != nullptr && mapped_heap_info->is_used()) { 1163 _total_heap_region_size = mapinfo->write_mapped_heap_region(mapped_heap_info); 1164 } else if (streamed_heap_info != nullptr && streamed_heap_info->is_used()) { 1165 _total_heap_region_size = mapinfo->write_streamed_heap_region(streamed_heap_info); 1166 } 1167 1168 print_region_stats(mapinfo, mapped_heap_info, streamed_heap_info); 1169 1170 mapinfo->set_requested_base((char*)AOTMetaspace::requested_base_address()); 1171 mapinfo->set_header_crc(mapinfo->compute_header_crc()); 1172 // After this point, we should not write any data into mapinfo->header() since this 1173 // would corrupt its checksum we have calculated before. 1174 mapinfo->write_header(); 1175 mapinfo->close(); 1176 1177 aot_log_info(aot)("Full module graph = %s", CDSConfig::is_dumping_full_module_graph() ? "enabled" : "disabled"); 1178 if (log_is_enabled(Info, aot)) { 1179 print_stats(); 1180 } 1181 1182 if (log_is_enabled(Info, aot, map)) { 1183 AOTMapLogger::dumptime_log(this, mapinfo, mapped_heap_info, streamed_heap_info, bitmap, bitmap_size_in_bytes); 1184 } 1185 CDS_JAVA_HEAP_ONLY(HeapShared::destroy_archived_object_cache()); 1186 FREE_C_HEAP_ARRAY(char, bitmap); 1187 } 1188 1189 void ArchiveBuilder::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) { 1190 mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec); 1191 } 1192 1193 void ArchiveBuilder::count_relocated_pointer(bool tagged, bool nulled) { 1194 _relocated_ptr_info._num_ptrs ++; 1195 _relocated_ptr_info._num_tagged_ptrs += tagged ? 1 : 0; 1196 _relocated_ptr_info._num_nulled_ptrs += nulled ? 1 : 0; 1197 } 1198 1199 void ArchiveBuilder::print_region_stats(FileMapInfo *mapinfo, 1200 AOTMappedHeapInfo* mapped_heap_info, 1201 AOTStreamedHeapInfo* streamed_heap_info) { 1202 // Print statistics of all the regions 1203 const size_t bitmap_used = mapinfo->region_at(AOTMetaspace::bm)->used(); 1204 const size_t bitmap_reserved = mapinfo->region_at(AOTMetaspace::bm)->used_aligned(); 1205 const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() + 1206 bitmap_reserved + 1207 _total_heap_region_size; 1208 const size_t total_bytes = _ro_region.used() + _rw_region.used() + 1209 bitmap_used + 1210 _total_heap_region_size; 1211 const double total_u_perc = percent_of(total_bytes, total_reserved); 1212 1213 _rw_region.print(total_reserved); 1214 _ro_region.print(total_reserved); 1215 _ac_region.print(total_reserved); 1216 1217 print_bitmap_region_stats(bitmap_used, total_reserved); 1218 1219 if (mapped_heap_info != nullptr && mapped_heap_info->is_used()) { 1220 print_heap_region_stats(mapped_heap_info->buffer_start(), mapped_heap_info->buffer_byte_size(), total_reserved); 1221 } else if (streamed_heap_info != nullptr && streamed_heap_info->is_used()) { 1222 print_heap_region_stats(streamed_heap_info->buffer_start(), streamed_heap_info->buffer_byte_size(), total_reserved); 1223 } 1224 1225 aot_log_debug(aot)("total : %9zu [100.0%% of total] out of %9zu bytes [%5.1f%% used]", 1226 total_bytes, total_reserved, total_u_perc); 1227 } 1228 1229 void ArchiveBuilder::print_bitmap_region_stats(size_t size, size_t total_size) { 1230 aot_log_debug(aot)("bm space: %9zu [ %4.1f%% of total] out of %9zu bytes [100.0%% used]", 1231 size, size/double(total_size)*100.0, size); 1232 } 1233 1234 void ArchiveBuilder::print_heap_region_stats(char* start, size_t size, size_t total_size) { 1235 char* top = start + size; 1236 aot_log_debug(aot)("hp space: %9zu [ %4.1f%% of total] out of %9zu bytes [100.0%% used] at " INTPTR_FORMAT, 1237 size, size/double(total_size)*100.0, size, p2i(start)); 1238 } 1239 1240 void ArchiveBuilder::report_out_of_space(const char* name, size_t needed_bytes) { 1241 // This is highly unlikely to happen on 64-bits because we have reserved a 4GB space. 1242 // On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes 1243 // or so. 1244 _rw_region.print_out_of_space_msg(name, needed_bytes); 1245 _ro_region.print_out_of_space_msg(name, needed_bytes); 1246 1247 log_error(aot)("Unable to allocate from '%s' region: Please reduce the number of shared classes.", name); 1248 AOTMetaspace::unrecoverable_writing_error(); 1249 } --- EOF ---