1 /* 2 * Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "cds/archiveBuilder.hpp" 27 #include "cds/archiveHeapWriter.hpp" 28 #include "cds/archiveUtils.hpp" 29 #include "cds/cdsConfig.hpp" 30 #include "cds/cppVtables.hpp" 31 #include "cds/dumpAllocStats.hpp" 32 #include "cds/dynamicArchive.hpp" 33 #include "cds/heapShared.hpp" 34 #include "cds/metaspaceShared.hpp" 35 #include "cds/regeneratedClasses.hpp" 36 #include "classfile/classLoaderDataShared.hpp" 37 #include "classfile/javaClasses.hpp" 38 #include "classfile/symbolTable.hpp" 39 #include "classfile/systemDictionaryShared.hpp" 40 #include "classfile/vmClasses.hpp" 41 #include "interpreter/abstractInterpreter.hpp" 42 #include "logging/log.hpp" 43 #include "logging/logStream.hpp" 44 #include "memory/allStatic.hpp" 45 #include "memory/memRegion.hpp" 46 #include "memory/resourceArea.hpp" 47 #include "oops/compressedKlass.inline.hpp" 48 #include "oops/instanceKlass.hpp" 49 #include "oops/objArrayKlass.hpp" 50 #include "oops/objArrayOop.inline.hpp" 51 #include "oops/oopHandle.inline.hpp" 52 #include "runtime/arguments.hpp" 53 #include "runtime/fieldDescriptor.inline.hpp" 54 #include "runtime/globals_extension.hpp" 55 #include "runtime/javaThread.hpp" 56 #include "runtime/sharedRuntime.hpp" 57 #include "utilities/align.hpp" 58 #include "utilities/bitMap.inline.hpp" 59 #include "utilities/formatBuffer.hpp" 60 61 ArchiveBuilder* ArchiveBuilder::_current = nullptr; 62 63 ArchiveBuilder::OtherROAllocMark::~OtherROAllocMark() { 64 char* newtop = ArchiveBuilder::current()->_ro_region.top(); 65 ArchiveBuilder::alloc_stats()->record_other_type(int(newtop - _oldtop), true); 66 } 67 68 ArchiveBuilder::SourceObjList::SourceObjList() : _ptrmap(16 * K, mtClassShared) { 69 _total_bytes = 0; 70 _objs = new (mtClassShared) GrowableArray<SourceObjInfo*>(128 * K, mtClassShared); 71 } 72 73 ArchiveBuilder::SourceObjList::~SourceObjList() { 74 delete _objs; 75 } 76 77 void ArchiveBuilder::SourceObjList::append(SourceObjInfo* src_info) { 78 // Save this source object for copying 79 _objs->append(src_info); 80 81 // Prepare for marking the pointers in this source object 82 assert(is_aligned(_total_bytes, sizeof(address)), "must be"); 83 src_info->set_ptrmap_start(_total_bytes / sizeof(address)); 84 _total_bytes = align_up(_total_bytes + (uintx)src_info->size_in_bytes(), sizeof(address)); 85 src_info->set_ptrmap_end(_total_bytes / sizeof(address)); 86 87 BitMap::idx_t bitmap_size_needed = BitMap::idx_t(src_info->ptrmap_end()); 88 if (_ptrmap.size() <= bitmap_size_needed) { 89 _ptrmap.resize((bitmap_size_needed + 1) * 2); 90 } 91 } 92 93 void ArchiveBuilder::SourceObjList::remember_embedded_pointer(SourceObjInfo* src_info, MetaspaceClosure::Ref* ref) { 94 // src_obj contains a pointer. Remember the location of this pointer in _ptrmap, 95 // so that we can copy/relocate it later. 96 address src_obj = src_info->source_addr(); 97 address* field_addr = ref->addr(); 98 assert(src_info->ptrmap_start() < _total_bytes, "sanity"); 99 assert(src_info->ptrmap_end() <= _total_bytes, "sanity"); 100 assert(*field_addr != nullptr, "should have checked"); 101 102 intx field_offset_in_bytes = ((address)field_addr) - src_obj; 103 DEBUG_ONLY(int src_obj_size = src_info->size_in_bytes();) 104 assert(field_offset_in_bytes >= 0, "must be"); 105 assert(field_offset_in_bytes + intx(sizeof(intptr_t)) <= intx(src_obj_size), "must be"); 106 assert(is_aligned(field_offset_in_bytes, sizeof(address)), "must be"); 107 108 BitMap::idx_t idx = BitMap::idx_t(src_info->ptrmap_start() + (uintx)(field_offset_in_bytes / sizeof(address))); 109 _ptrmap.set_bit(BitMap::idx_t(idx)); 110 } 111 112 class RelocateEmbeddedPointers : public BitMapClosure { 113 ArchiveBuilder* _builder; 114 address _buffered_obj; 115 BitMap::idx_t _start_idx; 116 public: 117 RelocateEmbeddedPointers(ArchiveBuilder* builder, address buffered_obj, BitMap::idx_t start_idx) : 118 _builder(builder), _buffered_obj(buffered_obj), _start_idx(start_idx) {} 119 120 bool do_bit(BitMap::idx_t bit_offset) { 121 size_t field_offset = size_t(bit_offset - _start_idx) * sizeof(address); 122 address* ptr_loc = (address*)(_buffered_obj + field_offset); 123 124 address old_p = *ptr_loc; 125 address new_p = _builder->get_buffered_addr(old_p); 126 127 log_trace(cds)("Ref: [" PTR_FORMAT "] -> " PTR_FORMAT " => " PTR_FORMAT, 128 p2i(ptr_loc), p2i(old_p), p2i(new_p)); 129 130 ArchivePtrMarker::set_and_mark_pointer(ptr_loc, new_p); 131 return true; // keep iterating the bitmap 132 } 133 }; 134 135 void ArchiveBuilder::SourceObjList::relocate(int i, ArchiveBuilder* builder) { 136 SourceObjInfo* src_info = objs()->at(i); 137 assert(src_info->should_copy(), "must be"); 138 BitMap::idx_t start = BitMap::idx_t(src_info->ptrmap_start()); // inclusive 139 BitMap::idx_t end = BitMap::idx_t(src_info->ptrmap_end()); // exclusive 140 141 RelocateEmbeddedPointers relocator(builder, src_info->buffered_addr(), start); 142 _ptrmap.iterate(&relocator, start, end); 143 } 144 145 ArchiveBuilder::ArchiveBuilder() : 146 _current_dump_space(nullptr), 147 _buffer_bottom(nullptr), 148 _last_verified_top(nullptr), 149 _num_dump_regions_used(0), 150 _other_region_used_bytes(0), 151 _requested_static_archive_bottom(nullptr), 152 _requested_static_archive_top(nullptr), 153 _requested_dynamic_archive_bottom(nullptr), 154 _requested_dynamic_archive_top(nullptr), 155 _mapped_static_archive_bottom(nullptr), 156 _mapped_static_archive_top(nullptr), 157 _buffer_to_requested_delta(0), 158 _rw_region("rw", MAX_SHARED_DELTA), 159 _ro_region("ro", MAX_SHARED_DELTA), 160 _ptrmap(mtClassShared), 161 _rw_src_objs(), 162 _ro_src_objs(), 163 _src_obj_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE), 164 _buffered_to_src_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE), 165 _total_heap_region_size(0), 166 _estimated_metaspaceobj_bytes(0), 167 _estimated_hashtable_bytes(0) 168 { 169 _klasses = new (mtClassShared) GrowableArray<Klass*>(4 * K, mtClassShared); 170 _symbols = new (mtClassShared) GrowableArray<Symbol*>(256 * K, mtClassShared); 171 172 assert(_current == nullptr, "must be"); 173 _current = this; 174 } 175 176 ArchiveBuilder::~ArchiveBuilder() { 177 assert(_current == this, "must be"); 178 _current = nullptr; 179 180 for (int i = 0; i < _symbols->length(); i++) { 181 _symbols->at(i)->decrement_refcount(); 182 } 183 184 delete _klasses; 185 delete _symbols; 186 if (_shared_rs.is_reserved()) { 187 _shared_rs.release(); 188 } 189 } 190 191 class GatherKlassesAndSymbols : public UniqueMetaspaceClosure { 192 ArchiveBuilder* _builder; 193 194 public: 195 GatherKlassesAndSymbols(ArchiveBuilder* builder) : _builder(builder) {} 196 197 virtual bool do_unique_ref(Ref* ref, bool read_only) { 198 return _builder->gather_klass_and_symbol(ref, read_only); 199 } 200 }; 201 202 bool ArchiveBuilder::gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only) { 203 if (ref->obj() == nullptr) { 204 return false; 205 } 206 if (get_follow_mode(ref) != make_a_copy) { 207 return false; 208 } 209 if (ref->msotype() == MetaspaceObj::ClassType) { 210 Klass* klass = (Klass*)ref->obj(); 211 assert(klass->is_klass(), "must be"); 212 if (!is_excluded(klass)) { 213 _klasses->append(klass); 214 } 215 // See RunTimeClassInfo::get_for() 216 _estimated_metaspaceobj_bytes += align_up(BytesPerWord, SharedSpaceObjectAlignment); 217 } else if (ref->msotype() == MetaspaceObj::SymbolType) { 218 // Make sure the symbol won't be GC'ed while we are dumping the archive. 219 Symbol* sym = (Symbol*)ref->obj(); 220 sym->increment_refcount(); 221 _symbols->append(sym); 222 } 223 224 int bytes = ref->size() * BytesPerWord; 225 _estimated_metaspaceobj_bytes += align_up(bytes, SharedSpaceObjectAlignment); 226 227 return true; // recurse 228 } 229 230 void ArchiveBuilder::gather_klasses_and_symbols() { 231 ResourceMark rm; 232 log_info(cds)("Gathering classes and symbols ... "); 233 GatherKlassesAndSymbols doit(this); 234 iterate_roots(&doit); 235 #if INCLUDE_CDS_JAVA_HEAP 236 if (CDSConfig::is_dumping_full_module_graph()) { 237 ClassLoaderDataShared::iterate_symbols(&doit); 238 } 239 #endif 240 doit.finish(); 241 242 if (CDSConfig::is_dumping_static_archive()) { 243 // To ensure deterministic contents in the static archive, we need to ensure that 244 // we iterate the MetaspaceObjs in a deterministic order. It doesn't matter where 245 // the MetaspaceObjs are located originally, as they are copied sequentially into 246 // the archive during the iteration. 247 // 248 // The only issue here is that the symbol table and the system directories may be 249 // randomly ordered, so we copy the symbols and klasses into two arrays and sort 250 // them deterministically. 251 // 252 // During -Xshare:dump, the order of Symbol creation is strictly determined by 253 // the SharedClassListFile (class loading is done in a single thread and the JIT 254 // is disabled). Also, Symbols are allocated in monotonically increasing addresses 255 // (see Symbol::operator new(size_t, int)). So if we iterate the Symbols by 256 // ascending address order, we ensure that all Symbols are copied into deterministic 257 // locations in the archive. 258 // 259 // TODO: in the future, if we want to produce deterministic contents in the 260 // dynamic archive, we might need to sort the symbols alphabetically (also see 261 // DynamicArchiveBuilder::sort_methods()). 262 log_info(cds)("Sorting symbols ... "); 263 _symbols->sort(compare_symbols_by_address); 264 sort_klasses(); 265 266 // TODO -- we need a proper estimate for the archived modules, etc, 267 // but this should be enough for now 268 _estimated_metaspaceobj_bytes += 200 * 1024 * 1024; 269 } 270 } 271 272 int ArchiveBuilder::compare_symbols_by_address(Symbol** a, Symbol** b) { 273 if (a[0] < b[0]) { 274 return -1; 275 } else { 276 assert(a[0] > b[0], "Duplicated symbol %s unexpected", (*a)->as_C_string()); 277 return 1; 278 } 279 } 280 281 int ArchiveBuilder::compare_klass_by_name(Klass** a, Klass** b) { 282 return a[0]->name()->fast_compare(b[0]->name()); 283 } 284 285 void ArchiveBuilder::sort_klasses() { 286 log_info(cds)("Sorting classes ... "); 287 _klasses->sort(compare_klass_by_name); 288 } 289 290 size_t ArchiveBuilder::estimate_archive_size() { 291 // size of the symbol table and two dictionaries, plus the RunTimeClassInfo's 292 size_t symbol_table_est = SymbolTable::estimate_size_for_archive(); 293 size_t dictionary_est = SystemDictionaryShared::estimate_size_for_archive(); 294 _estimated_hashtable_bytes = symbol_table_est + dictionary_est; 295 296 size_t total = 0; 297 298 total += _estimated_metaspaceobj_bytes; 299 total += _estimated_hashtable_bytes; 300 301 // allow fragmentation at the end of each dump region 302 total += _total_dump_regions * MetaspaceShared::core_region_alignment(); 303 304 log_info(cds)("_estimated_hashtable_bytes = " SIZE_FORMAT " + " SIZE_FORMAT " = " SIZE_FORMAT, 305 symbol_table_est, dictionary_est, _estimated_hashtable_bytes); 306 log_info(cds)("_estimated_metaspaceobj_bytes = " SIZE_FORMAT, _estimated_metaspaceobj_bytes); 307 log_info(cds)("total estimate bytes = " SIZE_FORMAT, total); 308 309 return align_up(total, MetaspaceShared::core_region_alignment()); 310 } 311 312 address ArchiveBuilder::reserve_buffer() { 313 size_t buffer_size = estimate_archive_size(); 314 ReservedSpace rs(buffer_size, MetaspaceShared::core_region_alignment(), os::vm_page_size()); 315 if (!rs.is_reserved()) { 316 log_error(cds)("Failed to reserve " SIZE_FORMAT " bytes of output buffer.", buffer_size); 317 MetaspaceShared::unrecoverable_writing_error(); 318 } 319 320 // buffer_bottom is the lowest address of the 2 core regions (rw, ro) when 321 // we are copying the class metadata into the buffer. 322 address buffer_bottom = (address)rs.base(); 323 log_info(cds)("Reserved output buffer space at " PTR_FORMAT " [" SIZE_FORMAT " bytes]", 324 p2i(buffer_bottom), buffer_size); 325 _shared_rs = rs; 326 327 _buffer_bottom = buffer_bottom; 328 _last_verified_top = buffer_bottom; 329 _current_dump_space = &_rw_region; 330 _num_dump_regions_used = 1; 331 _other_region_used_bytes = 0; 332 _current_dump_space->init(&_shared_rs, &_shared_vs); 333 334 ArchivePtrMarker::initialize(&_ptrmap, &_shared_vs); 335 336 // The bottom of the static archive should be mapped at this address by default. 337 _requested_static_archive_bottom = (address)MetaspaceShared::requested_base_address(); 338 339 // The bottom of the archive (that I am writing now) should be mapped at this address by default. 340 address my_archive_requested_bottom; 341 342 if (CDSConfig::is_dumping_static_archive()) { 343 my_archive_requested_bottom = _requested_static_archive_bottom; 344 } else { 345 _mapped_static_archive_bottom = (address)MetaspaceObj::shared_metaspace_base(); 346 _mapped_static_archive_top = (address)MetaspaceObj::shared_metaspace_top(); 347 assert(_mapped_static_archive_top >= _mapped_static_archive_bottom, "must be"); 348 size_t static_archive_size = _mapped_static_archive_top - _mapped_static_archive_bottom; 349 350 // At run time, we will mmap the dynamic archive at my_archive_requested_bottom 351 _requested_static_archive_top = _requested_static_archive_bottom + static_archive_size; 352 my_archive_requested_bottom = align_up(_requested_static_archive_top, MetaspaceShared::core_region_alignment()); 353 354 _requested_dynamic_archive_bottom = my_archive_requested_bottom; 355 } 356 357 _buffer_to_requested_delta = my_archive_requested_bottom - _buffer_bottom; 358 359 address my_archive_requested_top = my_archive_requested_bottom + buffer_size; 360 if (my_archive_requested_bottom < _requested_static_archive_bottom || 361 my_archive_requested_top <= _requested_static_archive_bottom) { 362 // Size overflow. 363 log_error(cds)("my_archive_requested_bottom = " INTPTR_FORMAT, p2i(my_archive_requested_bottom)); 364 log_error(cds)("my_archive_requested_top = " INTPTR_FORMAT, p2i(my_archive_requested_top)); 365 log_error(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is too high. " 366 "Please rerun java -Xshare:dump with a lower value", p2i(_requested_static_archive_bottom)); 367 MetaspaceShared::unrecoverable_writing_error(); 368 } 369 370 if (CDSConfig::is_dumping_static_archive()) { 371 // We don't want any valid object to be at the very bottom of the archive. 372 // See ArchivePtrMarker::mark_pointer(). 373 rw_region()->allocate(16); 374 } 375 376 return buffer_bottom; 377 } 378 379 void ArchiveBuilder::iterate_sorted_roots(MetaspaceClosure* it) { 380 int num_symbols = _symbols->length(); 381 for (int i = 0; i < num_symbols; i++) { 382 it->push(_symbols->adr_at(i)); 383 } 384 385 int num_klasses = _klasses->length(); 386 for (int i = 0; i < num_klasses; i++) { 387 it->push(_klasses->adr_at(i)); 388 } 389 390 iterate_roots(it); 391 } 392 393 class GatherSortedSourceObjs : public MetaspaceClosure { 394 ArchiveBuilder* _builder; 395 396 public: 397 GatherSortedSourceObjs(ArchiveBuilder* builder) : _builder(builder) {} 398 399 virtual bool do_ref(Ref* ref, bool read_only) { 400 return _builder->gather_one_source_obj(ref, read_only); 401 } 402 }; 403 404 bool ArchiveBuilder::gather_one_source_obj(MetaspaceClosure::Ref* ref, bool read_only) { 405 address src_obj = ref->obj(); 406 if (src_obj == nullptr) { 407 return false; 408 } 409 if (RegeneratedClasses::has_been_regenerated(src_obj)) { 410 // No need to copy it. We will later relocate it to point to the regenerated klass/method. 411 return false; 412 } 413 remember_embedded_pointer_in_enclosing_obj(ref); 414 415 FollowMode follow_mode = get_follow_mode(ref); 416 SourceObjInfo src_info(ref, read_only, follow_mode); 417 bool created; 418 SourceObjInfo* p = _src_obj_table.put_if_absent(src_obj, src_info, &created); 419 if (created) { 420 if (_src_obj_table.maybe_grow()) { 421 log_info(cds, hashtables)("Expanded _src_obj_table table to %d", _src_obj_table.table_size()); 422 } 423 } 424 425 #ifdef ASSERT 426 if (ref->msotype() == MetaspaceObj::MethodType) { 427 Method* m = (Method*)ref->obj(); 428 assert(!RegeneratedClasses::has_been_regenerated((address)m->method_holder()), 429 "Should not archive methods in a class that has been regenerated"); 430 } 431 #endif 432 433 assert(p->read_only() == src_info.read_only(), "must be"); 434 435 if (created && src_info.should_copy()) { 436 if (read_only) { 437 _ro_src_objs.append(p); 438 } else { 439 _rw_src_objs.append(p); 440 } 441 return true; // Need to recurse into this ref only if we are copying it 442 } else { 443 return false; 444 } 445 } 446 447 void ArchiveBuilder::record_regenerated_object(address orig_src_obj, address regen_src_obj) { 448 // Record the fact that orig_src_obj has been replaced by regen_src_obj. All calls to get_buffered_addr(orig_src_obj) 449 // should return the same value as get_buffered_addr(regen_src_obj). 450 SourceObjInfo* p = _src_obj_table.get(regen_src_obj); 451 assert(p != nullptr, "regenerated object should always be dumped"); 452 SourceObjInfo orig_src_info(orig_src_obj, p); 453 bool created; 454 _src_obj_table.put_if_absent(orig_src_obj, orig_src_info, &created); 455 assert(created, "We shouldn't have archived the original copy of a regenerated object"); 456 } 457 458 // Remember that we have a pointer inside ref->enclosing_obj() that points to ref->obj() 459 void ArchiveBuilder::remember_embedded_pointer_in_enclosing_obj(MetaspaceClosure::Ref* ref) { 460 assert(ref->obj() != nullptr, "should have checked"); 461 462 address enclosing_obj = ref->enclosing_obj(); 463 if (enclosing_obj == nullptr) { 464 return; 465 } 466 467 // We are dealing with 3 addresses: 468 // address o = ref->obj(): We have found an object whose address is o. 469 // address* mpp = ref->mpp(): The object o is pointed to by a pointer whose address is mpp. 470 // I.e., (*mpp == o) 471 // enclosing_obj : If non-null, it is the object which has a field that points to o. 472 // mpp is the address if that field. 473 // 474 // Example: We have an array whose first element points to a Method: 475 // Method* o = 0x0000abcd; 476 // Array<Method*>* enclosing_obj = 0x00001000; 477 // enclosing_obj->at_put(0, o); 478 // 479 // We the MetaspaceClosure iterates on the very first element of this array, we have 480 // ref->obj() == 0x0000abcd (the Method) 481 // ref->mpp() == 0x00001008 (the location of the first element in the array) 482 // ref->enclosing_obj() == 0x00001000 (the Array that contains the Method) 483 // 484 // We use the above information to mark the bitmap to indicate that there's a pointer on address 0x00001008. 485 SourceObjInfo* src_info = _src_obj_table.get(enclosing_obj); 486 if (src_info == nullptr || !src_info->should_copy()) { 487 // source objects of point_to_it/set_to_null types are not copied 488 // so we don't need to remember their pointers. 489 } else { 490 if (src_info->read_only()) { 491 _ro_src_objs.remember_embedded_pointer(src_info, ref); 492 } else { 493 _rw_src_objs.remember_embedded_pointer(src_info, ref); 494 } 495 } 496 } 497 498 void ArchiveBuilder::gather_source_objs() { 499 ResourceMark rm; 500 log_info(cds)("Gathering all archivable objects ... "); 501 gather_klasses_and_symbols(); 502 GatherSortedSourceObjs doit(this); 503 iterate_sorted_roots(&doit); 504 doit.finish(); 505 } 506 507 bool ArchiveBuilder::is_excluded(Klass* klass) { 508 if (klass->is_instance_klass()) { 509 InstanceKlass* ik = InstanceKlass::cast(klass); 510 return SystemDictionaryShared::is_excluded_class(ik); 511 } else if (klass->is_objArray_klass()) { 512 Klass* bottom = ObjArrayKlass::cast(klass)->bottom_klass(); 513 if (MetaspaceShared::is_shared_static(bottom)) { 514 // The bottom class is in the static archive so it's clearly not excluded. 515 assert(CDSConfig::is_dumping_dynamic_archive(), "sanity"); 516 return false; 517 } else if (bottom->is_instance_klass()) { 518 return SystemDictionaryShared::is_excluded_class(InstanceKlass::cast(bottom)); 519 } 520 } 521 522 return false; 523 } 524 525 ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref *ref) { 526 address obj = ref->obj(); 527 if (MetaspaceShared::is_in_shared_metaspace(obj)) { 528 // Don't dump existing shared metadata again. 529 return point_to_it; 530 } else if (ref->msotype() == MetaspaceObj::MethodDataType || 531 ref->msotype() == MetaspaceObj::MethodCountersType) { 532 return set_to_null; 533 } else { 534 if (ref->msotype() == MetaspaceObj::ClassType) { 535 Klass* klass = (Klass*)ref->obj(); 536 assert(klass->is_klass(), "must be"); 537 if (is_excluded(klass)) { 538 ResourceMark rm; 539 log_debug(cds, dynamic)("Skipping class (excluded): %s", klass->external_name()); 540 return set_to_null; 541 } 542 } 543 544 return make_a_copy; 545 } 546 } 547 548 void ArchiveBuilder::start_dump_space(DumpRegion* next) { 549 address bottom = _last_verified_top; 550 address top = (address)(current_dump_space()->top()); 551 _other_region_used_bytes += size_t(top - bottom); 552 553 current_dump_space()->pack(next); 554 _current_dump_space = next; 555 _num_dump_regions_used ++; 556 557 _last_verified_top = (address)(current_dump_space()->top()); 558 } 559 560 void ArchiveBuilder::verify_estimate_size(size_t estimate, const char* which) { 561 address bottom = _last_verified_top; 562 address top = (address)(current_dump_space()->top()); 563 size_t used = size_t(top - bottom) + _other_region_used_bytes; 564 int diff = int(estimate) - int(used); 565 566 log_info(cds)("%s estimate = " SIZE_FORMAT " used = " SIZE_FORMAT "; diff = %d bytes", which, estimate, used, diff); 567 assert(diff >= 0, "Estimate is too small"); 568 569 _last_verified_top = top; 570 _other_region_used_bytes = 0; 571 } 572 573 char* ArchiveBuilder::ro_strdup(const char* s) { 574 char* archived_str = ro_region_alloc((int)strlen(s) + 1); 575 strcpy(archived_str, s); 576 return archived_str; 577 } 578 579 void ArchiveBuilder::dump_rw_metadata() { 580 ResourceMark rm; 581 log_info(cds)("Allocating RW objects ... "); 582 make_shallow_copies(&_rw_region, &_rw_src_objs); 583 584 #if INCLUDE_CDS_JAVA_HEAP 585 if (CDSConfig::is_dumping_full_module_graph()) { 586 // Archive the ModuleEntry's and PackageEntry's of the 3 built-in loaders 587 char* start = rw_region()->top(); 588 ClassLoaderDataShared::allocate_archived_tables(); 589 alloc_stats()->record_modules(rw_region()->top() - start, /*read_only*/false); 590 } 591 #endif 592 } 593 594 void ArchiveBuilder::dump_ro_metadata() { 595 ResourceMark rm; 596 log_info(cds)("Allocating RO objects ... "); 597 598 start_dump_space(&_ro_region); 599 make_shallow_copies(&_ro_region, &_ro_src_objs); 600 601 #if INCLUDE_CDS_JAVA_HEAP 602 if (CDSConfig::is_dumping_full_module_graph()) { 603 char* start = ro_region()->top(); 604 ClassLoaderDataShared::init_archived_tables(); 605 alloc_stats()->record_modules(ro_region()->top() - start, /*read_only*/true); 606 } 607 #endif 608 609 RegeneratedClasses::record_regenerated_objects(); 610 } 611 612 void ArchiveBuilder::make_shallow_copies(DumpRegion *dump_region, 613 const ArchiveBuilder::SourceObjList* src_objs) { 614 for (int i = 0; i < src_objs->objs()->length(); i++) { 615 make_shallow_copy(dump_region, src_objs->objs()->at(i)); 616 } 617 log_info(cds)("done (%d objects)", src_objs->objs()->length()); 618 } 619 620 void ArchiveBuilder::make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info) { 621 address src = src_info->source_addr(); 622 int bytes = src_info->size_in_bytes(); 623 char* dest; 624 char* oldtop; 625 char* newtop; 626 627 oldtop = dump_region->top(); 628 if (src_info->msotype() == MetaspaceObj::ClassType) { 629 // Save a pointer immediate in front of an InstanceKlass, so 630 // we can do a quick lookup from InstanceKlass* -> RunTimeClassInfo* 631 // without building another hashtable. See RunTimeClassInfo::get_for() 632 // in systemDictionaryShared.cpp. 633 Klass* klass = (Klass*)src; 634 if (klass->is_instance_klass()) { 635 SystemDictionaryShared::validate_before_archiving(InstanceKlass::cast(klass)); 636 dump_region->allocate(sizeof(address)); 637 } 638 } 639 dest = dump_region->allocate(bytes); 640 newtop = dump_region->top(); 641 642 memcpy(dest, src, bytes); 643 644 // Update the hash of buffered sorted symbols for static dump so that the symbols have deterministic contents 645 if (CDSConfig::is_dumping_static_archive() && (src_info->msotype() == MetaspaceObj::SymbolType)) { 646 Symbol* buffered_symbol = (Symbol*)dest; 647 assert(((Symbol*)src)->is_permanent(), "archived symbols must be permanent"); 648 buffered_symbol->update_identity_hash(); 649 } 650 651 { 652 bool created; 653 _buffered_to_src_table.put_if_absent((address)dest, src, &created); 654 assert(created, "must be"); 655 if (_buffered_to_src_table.maybe_grow()) { 656 log_info(cds, hashtables)("Expanded _buffered_to_src_table table to %d", _buffered_to_src_table.table_size()); 657 } 658 } 659 660 intptr_t* archived_vtable = CppVtables::get_archived_vtable(src_info->msotype(), (address)dest); 661 if (archived_vtable != nullptr) { 662 *(address*)dest = (address)archived_vtable; 663 ArchivePtrMarker::mark_pointer((address*)dest); 664 } 665 666 log_trace(cds)("Copy: " PTR_FORMAT " ==> " PTR_FORMAT " %d", p2i(src), p2i(dest), bytes); 667 src_info->set_buffered_addr((address)dest); 668 669 _alloc_stats.record(src_info->msotype(), int(newtop - oldtop), src_info->read_only()); 670 } 671 672 // This is used by code that hand-assembles data structures, such as the LambdaProxyClassKey, that are 673 // not handled by MetaspaceClosure. 674 void ArchiveBuilder::write_pointer_in_buffer(address* ptr_location, address src_addr) { 675 assert(is_in_buffer_space(ptr_location), "must be"); 676 if (src_addr == nullptr) { 677 *ptr_location = nullptr; 678 ArchivePtrMarker::clear_pointer(ptr_location); 679 } else { 680 *ptr_location = get_buffered_addr(src_addr); 681 ArchivePtrMarker::mark_pointer(ptr_location); 682 } 683 } 684 685 address ArchiveBuilder::get_buffered_addr(address src_addr) const { 686 SourceObjInfo* p = _src_obj_table.get(src_addr); 687 assert(p != nullptr, "src_addr " INTPTR_FORMAT " is used but has not been archived", 688 p2i(src_addr)); 689 690 return p->buffered_addr(); 691 } 692 693 address ArchiveBuilder::get_source_addr(address buffered_addr) const { 694 assert(is_in_buffer_space(buffered_addr), "must be"); 695 address* src_p = _buffered_to_src_table.get(buffered_addr); 696 assert(src_p != nullptr && *src_p != nullptr, "must be"); 697 return *src_p; 698 } 699 700 void ArchiveBuilder::relocate_embedded_pointers(ArchiveBuilder::SourceObjList* src_objs) { 701 for (int i = 0; i < src_objs->objs()->length(); i++) { 702 src_objs->relocate(i, this); 703 } 704 } 705 706 void ArchiveBuilder::relocate_metaspaceobj_embedded_pointers() { 707 log_info(cds)("Relocating embedded pointers in core regions ... "); 708 relocate_embedded_pointers(&_rw_src_objs); 709 relocate_embedded_pointers(&_ro_src_objs); 710 } 711 712 void ArchiveBuilder::make_klasses_shareable() { 713 int num_instance_klasses = 0; 714 int num_boot_klasses = 0; 715 int num_platform_klasses = 0; 716 int num_app_klasses = 0; 717 int num_hidden_klasses = 0; 718 int num_unlinked_klasses = 0; 719 int num_unregistered_klasses = 0; 720 int num_obj_array_klasses = 0; 721 int num_type_array_klasses = 0; 722 723 for (int i = 0; i < klasses()->length(); i++) { 724 const char* type; 725 const char* unlinked = ""; 726 const char* hidden = ""; 727 const char* generated = ""; 728 Klass* k = get_buffered_addr(klasses()->at(i)); 729 k->remove_java_mirror(); 730 if (k->is_objArray_klass()) { 731 // InstanceKlass and TypeArrayKlass will in turn call remove_unshareable_info 732 // on their array classes. 733 num_obj_array_klasses ++; 734 type = "array"; 735 } else if (k->is_typeArray_klass()) { 736 num_type_array_klasses ++; 737 type = "array"; 738 k->remove_unshareable_info(); 739 } else { 740 assert(k->is_instance_klass(), " must be"); 741 num_instance_klasses ++; 742 InstanceKlass* ik = InstanceKlass::cast(k); 743 if (CDSConfig::is_dumping_dynamic_archive()) { 744 // For static dump, class loader type are already set. 745 ik->assign_class_loader_type(); 746 } 747 if (ik->is_shared_boot_class()) { 748 type = "boot"; 749 num_boot_klasses ++; 750 } else if (ik->is_shared_platform_class()) { 751 type = "plat"; 752 num_platform_klasses ++; 753 } else if (ik->is_shared_app_class()) { 754 type = "app"; 755 num_app_klasses ++; 756 } else { 757 assert(ik->is_shared_unregistered_class(), "must be"); 758 type = "unreg"; 759 num_unregistered_klasses ++; 760 } 761 762 if (!ik->is_linked()) { 763 num_unlinked_klasses ++; 764 unlinked = " ** unlinked"; 765 } 766 767 if (ik->is_hidden()) { 768 num_hidden_klasses ++; 769 hidden = " ** hidden"; 770 } 771 772 if (ik->is_generated_shared_class()) { 773 generated = " ** generated"; 774 } 775 MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread::current(), ik); 776 ik->remove_unshareable_info(); 777 } 778 779 if (log_is_enabled(Debug, cds, class)) { 780 ResourceMark rm; 781 log_debug(cds, class)("klasses[%5d] = " PTR_FORMAT " %-5s %s%s%s%s", i, 782 p2i(to_requested(k)), type, k->external_name(), 783 hidden, unlinked, generated); 784 } 785 } 786 787 log_info(cds)("Number of classes %d", num_instance_klasses + num_obj_array_klasses + num_type_array_klasses); 788 log_info(cds)(" instance classes = %5d", num_instance_klasses); 789 log_info(cds)(" boot = %5d", num_boot_klasses); 790 log_info(cds)(" app = %5d", num_app_klasses); 791 log_info(cds)(" platform = %5d", num_platform_klasses); 792 log_info(cds)(" unregistered = %5d", num_unregistered_klasses); 793 log_info(cds)(" (hidden) = %5d", num_hidden_klasses); 794 log_info(cds)(" (unlinked) = %5d", num_unlinked_klasses); 795 log_info(cds)(" obj array classes = %5d", num_obj_array_klasses); 796 log_info(cds)(" type array classes = %5d", num_type_array_klasses); 797 log_info(cds)(" symbols = %5d", _symbols->length()); 798 799 DynamicArchive::make_array_klasses_shareable(); 800 } 801 802 void ArchiveBuilder::serialize_dynamic_archivable_items(SerializeClosure* soc) { 803 SymbolTable::serialize_shared_table_header(soc, false); 804 SystemDictionaryShared::serialize_dictionary_headers(soc, false); 805 DynamicArchive::serialize_array_klasses(soc); 806 } 807 808 uintx ArchiveBuilder::buffer_to_offset(address p) const { 809 address requested_p = to_requested(p); 810 assert(requested_p >= _requested_static_archive_bottom, "must be"); 811 return requested_p - _requested_static_archive_bottom; 812 } 813 814 uintx ArchiveBuilder::any_to_offset(address p) const { 815 if (is_in_mapped_static_archive(p)) { 816 assert(CDSConfig::is_dumping_dynamic_archive(), "must be"); 817 return p - _mapped_static_archive_bottom; 818 } 819 if (!is_in_buffer_space(p)) { 820 // p must be a "source" address 821 p = get_buffered_addr(p); 822 } 823 return buffer_to_offset(p); 824 } 825 826 #if INCLUDE_CDS_JAVA_HEAP 827 narrowKlass ArchiveBuilder::get_requested_narrow_klass(Klass* k) { 828 assert(CDSConfig::is_dumping_heap(), "sanity"); 829 k = get_buffered_klass(k); 830 Klass* requested_k = to_requested(k); 831 address narrow_klass_base = _requested_static_archive_bottom; // runtime encoding base == runtime mapping start 832 const int narrow_klass_shift = ArchiveHeapWriter::precomputed_narrow_klass_shift; 833 return CompressedKlassPointers::encode_not_null(requested_k, narrow_klass_base, narrow_klass_shift); 834 } 835 #endif // INCLUDE_CDS_JAVA_HEAP 836 837 // RelocateBufferToRequested --- Relocate all the pointers in rw/ro, 838 // so that the archive can be mapped to the "requested" location without runtime relocation. 839 // 840 // - See ArchiveBuilder header for the definition of "buffer", "mapped" and "requested" 841 // - ArchivePtrMarker::ptrmap() marks all the pointers in the rw/ro regions 842 // - Every pointer must have one of the following values: 843 // [a] nullptr: 844 // No relocation is needed. Remove this pointer from ptrmap so we don't need to 845 // consider it at runtime. 846 // [b] Points into an object X which is inside the buffer: 847 // Adjust this pointer by _buffer_to_requested_delta, so it points to X 848 // when the archive is mapped at the requested location. 849 // [c] Points into an object Y which is inside mapped static archive: 850 // - This happens only during dynamic dump 851 // - Adjust this pointer by _mapped_to_requested_static_archive_delta, 852 // so it points to Y when the static archive is mapped at the requested location. 853 template <bool STATIC_DUMP> 854 class RelocateBufferToRequested : public BitMapClosure { 855 ArchiveBuilder* _builder; 856 address _buffer_bottom; 857 intx _buffer_to_requested_delta; 858 intx _mapped_to_requested_static_archive_delta; 859 size_t _max_non_null_offset; 860 861 public: 862 RelocateBufferToRequested(ArchiveBuilder* builder) { 863 _builder = builder; 864 _buffer_bottom = _builder->buffer_bottom(); 865 _buffer_to_requested_delta = builder->buffer_to_requested_delta(); 866 _mapped_to_requested_static_archive_delta = builder->requested_static_archive_bottom() - builder->mapped_static_archive_bottom(); 867 _max_non_null_offset = 0; 868 869 address bottom = _builder->buffer_bottom(); 870 address top = _builder->buffer_top(); 871 address new_bottom = bottom + _buffer_to_requested_delta; 872 address new_top = top + _buffer_to_requested_delta; 873 log_debug(cds)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT "] to " 874 "[" INTPTR_FORMAT " - " INTPTR_FORMAT "]", 875 p2i(bottom), p2i(top), 876 p2i(new_bottom), p2i(new_top)); 877 } 878 879 bool do_bit(size_t offset) { 880 address* p = (address*)_buffer_bottom + offset; 881 assert(_builder->is_in_buffer_space(p), "pointer must live in buffer space"); 882 883 if (*p == nullptr) { 884 // todo -- clear bit, etc 885 ArchivePtrMarker::ptrmap()->clear_bit(offset); 886 } else { 887 if (STATIC_DUMP) { 888 assert(_builder->is_in_buffer_space(*p), "old pointer must point inside buffer space"); 889 *p += _buffer_to_requested_delta; 890 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive"); 891 } else { 892 if (_builder->is_in_buffer_space(*p)) { 893 *p += _buffer_to_requested_delta; 894 // assert is in requested dynamic archive 895 } else { 896 assert(_builder->is_in_mapped_static_archive(*p), "old pointer must point inside buffer space or mapped static archive"); 897 *p += _mapped_to_requested_static_archive_delta; 898 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive"); 899 } 900 } 901 _max_non_null_offset = offset; 902 } 903 904 return true; // keep iterating 905 } 906 907 void doit() { 908 ArchivePtrMarker::ptrmap()->iterate(this); 909 ArchivePtrMarker::compact(_max_non_null_offset); 910 } 911 }; 912 913 914 void ArchiveBuilder::relocate_to_requested() { 915 ro_region()->pack(); 916 917 size_t my_archive_size = buffer_top() - buffer_bottom(); 918 919 if (CDSConfig::is_dumping_static_archive()) { 920 _requested_static_archive_top = _requested_static_archive_bottom + my_archive_size; 921 RelocateBufferToRequested<true> patcher(this); 922 patcher.doit(); 923 } else { 924 assert(CDSConfig::is_dumping_dynamic_archive(), "must be"); 925 _requested_dynamic_archive_top = _requested_dynamic_archive_bottom + my_archive_size; 926 RelocateBufferToRequested<false> patcher(this); 927 patcher.doit(); 928 } 929 } 930 931 // Write detailed info to a mapfile to analyze contents of the archive. 932 // static dump: 933 // java -Xshare:dump -Xlog:cds+map=trace:file=cds.map:none:filesize=0 934 // dynamic dump: 935 // java -cp MyApp.jar -XX:ArchiveClassesAtExit=MyApp.jsa \ 936 // -Xlog:cds+map=trace:file=cds.map:none:filesize=0 MyApp 937 // 938 // We need to do some address translation because the buffers used at dump time may be mapped to 939 // a different location at runtime. At dump time, the buffers may be at arbitrary locations 940 // picked by the OS. At runtime, we try to map at a fixed location (SharedBaseAddress). For 941 // consistency, we log everything using runtime addresses. 942 class ArchiveBuilder::CDSMapLogger : AllStatic { 943 static intx buffer_to_runtime_delta() { 944 // Translate the buffers used by the RW/RO regions to their eventual (requested) locations 945 // at runtime. 946 return ArchiveBuilder::current()->buffer_to_requested_delta(); 947 } 948 949 // rw/ro regions only 950 static void log_metaspace_region(const char* name, DumpRegion* region, 951 const ArchiveBuilder::SourceObjList* src_objs) { 952 address region_base = address(region->base()); 953 address region_top = address(region->top()); 954 log_region(name, region_base, region_top, region_base + buffer_to_runtime_delta()); 955 log_metaspace_objects(region, src_objs); 956 } 957 958 #define _LOG_PREFIX PTR_FORMAT ": @@ %-17s %d" 959 960 static void log_klass(Klass* k, address runtime_dest, const char* type_name, int bytes, Thread* current) { 961 ResourceMark rm(current); 962 log_debug(cds, map)(_LOG_PREFIX " %s", 963 p2i(runtime_dest), type_name, bytes, k->external_name()); 964 } 965 static void log_method(Method* m, address runtime_dest, const char* type_name, int bytes, Thread* current) { 966 ResourceMark rm(current); 967 log_debug(cds, map)(_LOG_PREFIX " %s", 968 p2i(runtime_dest), type_name, bytes, m->external_name()); 969 } 970 971 // rw/ro regions only 972 static void log_metaspace_objects(DumpRegion* region, const ArchiveBuilder::SourceObjList* src_objs) { 973 address last_obj_base = address(region->base()); 974 address last_obj_end = address(region->base()); 975 address region_end = address(region->end()); 976 Thread* current = Thread::current(); 977 for (int i = 0; i < src_objs->objs()->length(); i++) { 978 SourceObjInfo* src_info = src_objs->at(i); 979 address src = src_info->source_addr(); 980 address dest = src_info->buffered_addr(); 981 log_as_hex(last_obj_base, dest, last_obj_base + buffer_to_runtime_delta()); 982 address runtime_dest = dest + buffer_to_runtime_delta(); 983 int bytes = src_info->size_in_bytes(); 984 985 MetaspaceObj::Type type = src_info->msotype(); 986 const char* type_name = MetaspaceObj::type_name(type); 987 988 switch (type) { 989 case MetaspaceObj::ClassType: 990 log_klass((Klass*)src, runtime_dest, type_name, bytes, current); 991 break; 992 case MetaspaceObj::ConstantPoolType: 993 log_klass(((ConstantPool*)src)->pool_holder(), 994 runtime_dest, type_name, bytes, current); 995 break; 996 case MetaspaceObj::ConstantPoolCacheType: 997 log_klass(((ConstantPoolCache*)src)->constant_pool()->pool_holder(), 998 runtime_dest, type_name, bytes, current); 999 break; 1000 case MetaspaceObj::MethodType: 1001 log_method((Method*)src, runtime_dest, type_name, bytes, current); 1002 break; 1003 case MetaspaceObj::ConstMethodType: 1004 log_method(((ConstMethod*)src)->method(), runtime_dest, type_name, bytes, current); 1005 break; 1006 case MetaspaceObj::SymbolType: 1007 { 1008 ResourceMark rm(current); 1009 Symbol* s = (Symbol*)src; 1010 log_debug(cds, map)(_LOG_PREFIX " %s", p2i(runtime_dest), type_name, bytes, 1011 s->as_quoted_ascii()); 1012 } 1013 break; 1014 default: 1015 log_debug(cds, map)(_LOG_PREFIX, p2i(runtime_dest), type_name, bytes); 1016 break; 1017 } 1018 1019 last_obj_base = dest; 1020 last_obj_end = dest + bytes; 1021 } 1022 1023 log_as_hex(last_obj_base, last_obj_end, last_obj_base + buffer_to_runtime_delta()); 1024 if (last_obj_end < region_end) { 1025 log_debug(cds, map)(PTR_FORMAT ": @@ Misc data " SIZE_FORMAT " bytes", 1026 p2i(last_obj_end + buffer_to_runtime_delta()), 1027 size_t(region_end - last_obj_end)); 1028 log_as_hex(last_obj_end, region_end, last_obj_end + buffer_to_runtime_delta()); 1029 } 1030 } 1031 1032 #undef _LOG_PREFIX 1033 1034 // Log information about a region, whose address at dump time is [base .. top). At 1035 // runtime, this region will be mapped to requested_base. requested_base is 0 if this 1036 // region will be mapped at os-selected addresses (such as the bitmap region), or will 1037 // be accessed with os::read (the header). 1038 // 1039 // Note: across -Xshare:dump runs, base may be different, but requested_base should 1040 // be the same as the archive contents should be deterministic. 1041 static void log_region(const char* name, address base, address top, address requested_base) { 1042 size_t size = top - base; 1043 base = requested_base; 1044 top = requested_base + size; 1045 log_info(cds, map)("[%-18s " PTR_FORMAT " - " PTR_FORMAT " " SIZE_FORMAT_W(9) " bytes]", 1046 name, p2i(base), p2i(top), size); 1047 } 1048 1049 #if INCLUDE_CDS_JAVA_HEAP 1050 static void log_heap_region(ArchiveHeapInfo* heap_info) { 1051 MemRegion r = heap_info->buffer_region(); 1052 address start = address(r.start()); 1053 address end = address(r.end()); 1054 log_region("heap", start, end, ArchiveHeapWriter::buffered_addr_to_requested_addr(start)); 1055 1056 LogStreamHandle(Info, cds, map) st; 1057 1058 while (start < end) { 1059 size_t byte_size; 1060 oop source_oop = ArchiveHeapWriter::buffered_addr_to_source_obj(start); 1061 address requested_start = ArchiveHeapWriter::buffered_addr_to_requested_addr(start); 1062 st.print(PTR_FORMAT ": @@ Object ", p2i(requested_start)); 1063 1064 if (source_oop != nullptr) { 1065 // This is a regular oop that got archived. 1066 print_oop_with_requested_addr_cr(&st, source_oop, false); 1067 byte_size = source_oop->size() * BytesPerWord; 1068 } else if (start == ArchiveHeapWriter::buffered_heap_roots_addr()) { 1069 // HeapShared::roots() is copied specially, so it doesn't exist in 1070 // ArchiveHeapWriter::BufferOffsetToSourceObjectTable. 1071 // See ArchiveHeapWriter::copy_roots_to_buffer(). 1072 st.print_cr("HeapShared::roots[%d]", HeapShared::pending_roots()->length()); 1073 byte_size = ArchiveHeapWriter::heap_roots_word_size() * BytesPerWord; 1074 } else if ((byte_size = ArchiveHeapWriter::get_filler_size_at(start)) > 0) { 1075 // We have a filler oop, which also does not exist in BufferOffsetToSourceObjectTable. 1076 st.print_cr("filler " SIZE_FORMAT " bytes", byte_size); 1077 } else { 1078 ShouldNotReachHere(); 1079 } 1080 1081 address oop_end = start + byte_size; 1082 log_as_hex(start, oop_end, requested_start, /*is_heap=*/true); 1083 1084 if (source_oop != nullptr) { 1085 log_oop_details(heap_info, source_oop); 1086 } else if (start == ArchiveHeapWriter::buffered_heap_roots_addr()) { 1087 log_heap_roots(); 1088 } 1089 start = oop_end; 1090 } 1091 } 1092 1093 // ArchivedFieldPrinter is used to print the fields of archived objects. We can't 1094 // use _source_obj->print_on(), because we want to print the oop fields 1095 // in _source_obj with their requested addresses using print_oop_with_requested_addr_cr(). 1096 class ArchivedFieldPrinter : public FieldClosure { 1097 ArchiveHeapInfo* _heap_info; 1098 outputStream* _st; 1099 oop _source_obj; 1100 public: 1101 ArchivedFieldPrinter(ArchiveHeapInfo* heap_info, outputStream* st, oop src_obj) : 1102 _heap_info(heap_info), _st(st), _source_obj(src_obj) {} 1103 1104 void do_field(fieldDescriptor* fd) { 1105 _st->print(" - "); 1106 BasicType ft = fd->field_type(); 1107 switch (ft) { 1108 case T_ARRAY: 1109 case T_OBJECT: 1110 fd->print_on(_st); // print just the name and offset 1111 print_oop_with_requested_addr_cr(_st, _source_obj->obj_field(fd->offset())); 1112 break; 1113 default: 1114 if (ArchiveHeapWriter::is_marked_as_native_pointer(_heap_info, _source_obj, fd->offset())) { 1115 print_as_native_pointer(fd); 1116 } else { 1117 fd->print_on_for(_st, _source_obj); // name, offset, value 1118 _st->cr(); 1119 } 1120 } 1121 } 1122 1123 void print_as_native_pointer(fieldDescriptor* fd) { 1124 LP64_ONLY(assert(fd->field_type() == T_LONG, "must be")); 1125 NOT_LP64 (assert(fd->field_type() == T_INT, "must be")); 1126 1127 // We have a field that looks like an integer, but it's actually a pointer to a MetaspaceObj. 1128 address source_native_ptr = (address) 1129 LP64_ONLY(_source_obj->long_field(fd->offset())) 1130 NOT_LP64( _source_obj->int_field (fd->offset())); 1131 ArchiveBuilder* builder = ArchiveBuilder::current(); 1132 1133 // The value of the native pointer at runtime. 1134 address requested_native_ptr = builder->to_requested(builder->get_buffered_addr(source_native_ptr)); 1135 1136 // The address of _source_obj at runtime 1137 oop requested_obj = ArchiveHeapWriter::source_obj_to_requested_obj(_source_obj); 1138 // The address of this field in the requested space 1139 assert(requested_obj != nullptr, "Attempting to load field from null oop"); 1140 address requested_field_addr = cast_from_oop<address>(requested_obj) + fd->offset(); 1141 1142 fd->print_on(_st); 1143 _st->print_cr(PTR_FORMAT " (marked metadata pointer @" PTR_FORMAT " )", 1144 p2i(requested_native_ptr), p2i(requested_field_addr)); 1145 } 1146 }; 1147 1148 // Print the fields of instanceOops, or the elements of arrayOops 1149 static void log_oop_details(ArchiveHeapInfo* heap_info, oop source_oop) { 1150 LogStreamHandle(Trace, cds, map, oops) st; 1151 if (st.is_enabled()) { 1152 Klass* source_klass = source_oop->klass(); 1153 ArchiveBuilder* builder = ArchiveBuilder::current(); 1154 Klass* requested_klass = builder->to_requested(builder->get_buffered_addr(source_klass)); 1155 1156 st.print(" - klass: "); 1157 source_klass->print_value_on(&st); 1158 st.print(" " PTR_FORMAT, p2i(requested_klass)); 1159 st.cr(); 1160 1161 if (source_oop->is_typeArray()) { 1162 TypeArrayKlass::cast(source_klass)->oop_print_elements_on(typeArrayOop(source_oop), &st); 1163 } else if (source_oop->is_objArray()) { 1164 objArrayOop source_obj_array = objArrayOop(source_oop); 1165 for (int i = 0; i < source_obj_array->length(); i++) { 1166 st.print(" -%4d: ", i); 1167 print_oop_with_requested_addr_cr(&st, source_obj_array->obj_at(i)); 1168 } 1169 } else { 1170 st.print_cr(" - fields (" SIZE_FORMAT " words):", source_oop->size()); 1171 ArchivedFieldPrinter print_field(heap_info, &st, source_oop); 1172 InstanceKlass::cast(source_klass)->print_nonstatic_fields(&print_field); 1173 } 1174 } 1175 } 1176 1177 static void log_heap_roots() { 1178 LogStreamHandle(Trace, cds, map, oops) st; 1179 if (st.is_enabled()) { 1180 for (int i = 0; i < HeapShared::pending_roots()->length(); i++) { 1181 st.print("roots[%4d]: ", i); 1182 print_oop_with_requested_addr_cr(&st, HeapShared::pending_roots()->at(i)); 1183 } 1184 } 1185 } 1186 1187 // The output looks like this. The first number is the requested address. The second number is 1188 // the narrowOop version of the requested address. 1189 // 0x00000007ffc7e840 (0xfff8fd08) java.lang.Class 1190 // 0x00000007ffc000f8 (0xfff8001f) [B length: 11 1191 static void print_oop_with_requested_addr_cr(outputStream* st, oop source_oop, bool print_addr = true) { 1192 if (source_oop == nullptr) { 1193 st->print_cr("null"); 1194 } else { 1195 ResourceMark rm; 1196 oop requested_obj = ArchiveHeapWriter::source_obj_to_requested_obj(source_oop); 1197 if (print_addr) { 1198 st->print(PTR_FORMAT " ", p2i(requested_obj)); 1199 } 1200 if (UseCompressedOops) { 1201 st->print("(0x%08x) ", CompressedOops::narrow_oop_value(requested_obj)); 1202 } 1203 if (source_oop->is_array()) { 1204 int array_len = arrayOop(source_oop)->length(); 1205 st->print_cr("%s length: %d", source_oop->klass()->external_name(), array_len); 1206 } else { 1207 st->print_cr("%s", source_oop->klass()->external_name()); 1208 } 1209 } 1210 } 1211 #endif // INCLUDE_CDS_JAVA_HEAP 1212 1213 // Log all the data [base...top). Pretend that the base address 1214 // will be mapped to requested_base at run-time. 1215 static void log_as_hex(address base, address top, address requested_base, bool is_heap = false) { 1216 assert(top >= base, "must be"); 1217 1218 LogStreamHandle(Trace, cds, map) lsh; 1219 if (lsh.is_enabled()) { 1220 int unitsize = sizeof(address); 1221 if (is_heap && UseCompressedOops) { 1222 // This makes the compressed oop pointers easier to read, but 1223 // longs and doubles will be split into two words. 1224 unitsize = sizeof(narrowOop); 1225 } 1226 os::print_hex_dump(&lsh, base, top, unitsize, 32, requested_base); 1227 } 1228 } 1229 1230 static void log_header(FileMapInfo* mapinfo) { 1231 LogStreamHandle(Info, cds, map) lsh; 1232 if (lsh.is_enabled()) { 1233 mapinfo->print(&lsh); 1234 } 1235 } 1236 1237 public: 1238 static void log(ArchiveBuilder* builder, FileMapInfo* mapinfo, 1239 ArchiveHeapInfo* heap_info, 1240 char* bitmap, size_t bitmap_size_in_bytes) { 1241 log_info(cds, map)("%s CDS archive map for %s", CDSConfig::is_dumping_static_archive() ? "Static" : "Dynamic", mapinfo->full_path()); 1242 1243 address header = address(mapinfo->header()); 1244 address header_end = header + mapinfo->header()->header_size(); 1245 log_region("header", header, header_end, 0); 1246 log_header(mapinfo); 1247 log_as_hex(header, header_end, 0); 1248 1249 DumpRegion* rw_region = &builder->_rw_region; 1250 DumpRegion* ro_region = &builder->_ro_region; 1251 1252 log_metaspace_region("rw region", rw_region, &builder->_rw_src_objs); 1253 log_metaspace_region("ro region", ro_region, &builder->_ro_src_objs); 1254 1255 address bitmap_end = address(bitmap + bitmap_size_in_bytes); 1256 log_region("bitmap", address(bitmap), bitmap_end, 0); 1257 log_as_hex((address)bitmap, bitmap_end, 0); 1258 1259 #if INCLUDE_CDS_JAVA_HEAP 1260 if (heap_info->is_used()) { 1261 log_heap_region(heap_info); 1262 } 1263 #endif 1264 1265 log_info(cds, map)("[End of CDS archive map]"); 1266 } 1267 }; // end ArchiveBuilder::CDSMapLogger 1268 1269 void ArchiveBuilder::print_stats() { 1270 _alloc_stats.print_stats(int(_ro_region.used()), int(_rw_region.used())); 1271 } 1272 1273 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo, ArchiveHeapInfo* heap_info) { 1274 // Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with 1275 // MetaspaceShared::n_regions (internal to hotspot). 1276 assert(NUM_CDS_REGIONS == MetaspaceShared::n_regions, "sanity"); 1277 1278 write_region(mapinfo, MetaspaceShared::rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false); 1279 write_region(mapinfo, MetaspaceShared::ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false); 1280 1281 size_t bitmap_size_in_bytes; 1282 char* bitmap = mapinfo->write_bitmap_region(ArchivePtrMarker::ptrmap(), heap_info, 1283 bitmap_size_in_bytes); 1284 1285 if (heap_info->is_used()) { 1286 _total_heap_region_size = mapinfo->write_heap_region(heap_info); 1287 } 1288 1289 print_region_stats(mapinfo, heap_info); 1290 1291 mapinfo->set_requested_base((char*)MetaspaceShared::requested_base_address()); 1292 mapinfo->set_header_crc(mapinfo->compute_header_crc()); 1293 // After this point, we should not write any data into mapinfo->header() since this 1294 // would corrupt its checksum we have calculated before. 1295 mapinfo->write_header(); 1296 mapinfo->close(); 1297 1298 if (log_is_enabled(Info, cds)) { 1299 print_stats(); 1300 } 1301 1302 if (log_is_enabled(Info, cds, map)) { 1303 CDSMapLogger::log(this, mapinfo, heap_info, 1304 bitmap, bitmap_size_in_bytes); 1305 } 1306 CDS_JAVA_HEAP_ONLY(HeapShared::destroy_archived_object_cache()); 1307 FREE_C_HEAP_ARRAY(char, bitmap); 1308 } 1309 1310 void ArchiveBuilder::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) { 1311 mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec); 1312 } 1313 1314 void ArchiveBuilder::print_region_stats(FileMapInfo *mapinfo, ArchiveHeapInfo* heap_info) { 1315 // Print statistics of all the regions 1316 const size_t bitmap_used = mapinfo->region_at(MetaspaceShared::bm)->used(); 1317 const size_t bitmap_reserved = mapinfo->region_at(MetaspaceShared::bm)->used_aligned(); 1318 const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() + 1319 bitmap_reserved + 1320 _total_heap_region_size; 1321 const size_t total_bytes = _ro_region.used() + _rw_region.used() + 1322 bitmap_used + 1323 _total_heap_region_size; 1324 const double total_u_perc = percent_of(total_bytes, total_reserved); 1325 1326 _rw_region.print(total_reserved); 1327 _ro_region.print(total_reserved); 1328 1329 print_bitmap_region_stats(bitmap_used, total_reserved); 1330 1331 if (heap_info->is_used()) { 1332 print_heap_region_stats(heap_info, total_reserved); 1333 } 1334 1335 log_debug(cds)("total : " SIZE_FORMAT_W(9) " [100.0%% of total] out of " SIZE_FORMAT_W(9) " bytes [%5.1f%% used]", 1336 total_bytes, total_reserved, total_u_perc); 1337 } 1338 1339 void ArchiveBuilder::print_bitmap_region_stats(size_t size, size_t total_size) { 1340 log_debug(cds)("bm space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used]", 1341 size, size/double(total_size)*100.0, size); 1342 } 1343 1344 void ArchiveBuilder::print_heap_region_stats(ArchiveHeapInfo *info, size_t total_size) { 1345 char* start = info->buffer_start(); 1346 size_t size = info->buffer_byte_size(); 1347 char* top = start + size; 1348 log_debug(cds)("hp space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used] at " INTPTR_FORMAT, 1349 size, size/double(total_size)*100.0, size, p2i(start)); 1350 } 1351 1352 void ArchiveBuilder::report_out_of_space(const char* name, size_t needed_bytes) { 1353 // This is highly unlikely to happen on 64-bits because we have reserved a 4GB space. 1354 // On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes 1355 // or so. 1356 _rw_region.print_out_of_space_msg(name, needed_bytes); 1357 _ro_region.print_out_of_space_msg(name, needed_bytes); 1358 1359 log_error(cds)("Unable to allocate from '%s' region: Please reduce the number of shared classes.", name); 1360 MetaspaceShared::unrecoverable_writing_error(); 1361 } 1362 1363 1364 #ifndef PRODUCT 1365 void ArchiveBuilder::assert_is_vm_thread() { 1366 assert(Thread::current()->is_VM_thread(), "ArchiveBuilder should be used only inside the VMThread"); 1367 } 1368 #endif