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/cppVtables.hpp" 30 #include "cds/dumpAllocStats.hpp" 31 #include "cds/heapShared.hpp" 32 #include "cds/metaspaceShared.hpp" 33 #include "classfile/classLoaderDataShared.hpp" 34 #include "classfile/symbolTable.hpp" 35 #include "classfile/systemDictionaryShared.hpp" 36 #include "classfile/vmClasses.hpp" 37 #include "interpreter/abstractInterpreter.hpp" 38 #include "logging/log.hpp" 39 #include "logging/logStream.hpp" 40 #include "memory/allStatic.hpp" 41 #include "memory/memRegion.hpp" 42 #include "memory/resourceArea.hpp" 43 #include "oops/instanceKlass.hpp" 44 #include "oops/objArrayKlass.hpp" 45 #include "oops/objArrayOop.inline.hpp" 46 #include "oops/oopHandle.inline.hpp" 47 #include "runtime/arguments.hpp" 48 #include "runtime/globals_extension.hpp" 49 #include "runtime/javaThread.hpp" 50 #include "runtime/sharedRuntime.hpp" 51 #include "utilities/align.hpp" 52 #include "utilities/bitMap.inline.hpp" 53 #include "utilities/formatBuffer.hpp" 54 55 ArchiveBuilder* ArchiveBuilder::_current = nullptr; 56 57 ArchiveBuilder::OtherROAllocMark::~OtherROAllocMark() { 58 char* newtop = ArchiveBuilder::current()->_ro_region.top(); 59 ArchiveBuilder::alloc_stats()->record_other_type(int(newtop - _oldtop), true); 60 } 61 62 ArchiveBuilder::SourceObjList::SourceObjList() : _ptrmap(16 * K, mtClassShared) { 63 _total_bytes = 0; 64 _objs = new (mtClassShared) GrowableArray<SourceObjInfo*>(128 * K, mtClassShared); 65 } 66 67 ArchiveBuilder::SourceObjList::~SourceObjList() { 68 delete _objs; 69 } 70 71 void ArchiveBuilder::SourceObjList::append(MetaspaceClosure::Ref* enclosing_ref, SourceObjInfo* src_info) { 72 // Save this source object for copying 73 _objs->append(src_info); 74 75 // Prepare for marking the pointers in this source object 76 assert(is_aligned(_total_bytes, sizeof(address)), "must be"); 77 src_info->set_ptrmap_start(_total_bytes / sizeof(address)); 78 _total_bytes = align_up(_total_bytes + (uintx)src_info->size_in_bytes(), sizeof(address)); 79 src_info->set_ptrmap_end(_total_bytes / sizeof(address)); 80 81 BitMap::idx_t bitmap_size_needed = BitMap::idx_t(src_info->ptrmap_end()); 82 if (_ptrmap.size() <= bitmap_size_needed) { 83 _ptrmap.resize((bitmap_size_needed + 1) * 2); 84 } 85 } 86 87 void ArchiveBuilder::SourceObjList::remember_embedded_pointer(SourceObjInfo* src_info, MetaspaceClosure::Ref* ref) { 88 // src_obj contains a pointer. Remember the location of this pointer in _ptrmap, 89 // so that we can copy/relocate it later. E.g., if we have 90 // class Foo { intx scala; Bar* ptr; } 91 // Foo *f = 0x100; 92 // To mark the f->ptr pointer on 64-bit platform, this function is called with 93 // src_info()->obj() == 0x100 94 // ref->addr() == 0x108 95 address src_obj = src_info->obj(); 96 address* field_addr = ref->addr(); 97 assert(src_info->ptrmap_start() < _total_bytes, "sanity"); 98 assert(src_info->ptrmap_end() <= _total_bytes, "sanity"); 99 assert(*field_addr != nullptr, "should have checked"); 100 101 intx field_offset_in_bytes = ((address)field_addr) - src_obj; 102 DEBUG_ONLY(int src_obj_size = src_info->size_in_bytes();) 103 assert(field_offset_in_bytes >= 0, "must be"); 104 assert(field_offset_in_bytes + intx(sizeof(intptr_t)) <= intx(src_obj_size), "must be"); 105 assert(is_aligned(field_offset_in_bytes, sizeof(address)), "must be"); 106 107 BitMap::idx_t idx = BitMap::idx_t(src_info->ptrmap_start() + (uintx)(field_offset_in_bytes / sizeof(address))); 108 _ptrmap.set_bit(BitMap::idx_t(idx)); 109 } 110 111 class RelocateEmbeddedPointers : public BitMapClosure { 112 ArchiveBuilder* _builder; 113 address _buffered_obj; 114 BitMap::idx_t _start_idx; 115 public: 116 RelocateEmbeddedPointers(ArchiveBuilder* builder, address buffered_obj, BitMap::idx_t start_idx) : 117 _builder(builder), _buffered_obj(buffered_obj), _start_idx(start_idx) {} 118 119 bool do_bit(BitMap::idx_t bit_offset) { 120 size_t field_offset = size_t(bit_offset - _start_idx) * sizeof(address); 121 address* ptr_loc = (address*)(_buffered_obj + field_offset); 122 123 address old_p = *ptr_loc; 124 address new_p = _builder->get_buffered_addr(old_p); 125 126 log_trace(cds)("Ref: [" PTR_FORMAT "] -> " PTR_FORMAT " => " PTR_FORMAT, 127 p2i(ptr_loc), p2i(old_p), p2i(new_p)); 128 129 ArchivePtrMarker::set_and_mark_pointer(ptr_loc, new_p); 130 return true; // keep iterating the bitmap 131 } 132 }; 133 134 void ArchiveBuilder::SourceObjList::relocate(int i, ArchiveBuilder* builder) { 135 SourceObjInfo* src_info = objs()->at(i); 136 assert(src_info->should_copy(), "must be"); 137 BitMap::idx_t start = BitMap::idx_t(src_info->ptrmap_start()); // inclusive 138 BitMap::idx_t end = BitMap::idx_t(src_info->ptrmap_end()); // exclusive 139 140 RelocateEmbeddedPointers relocator(builder, src_info->buffered_addr(), start); 141 _ptrmap.iterate(&relocator, start, end); 142 } 143 144 ArchiveBuilder::ArchiveBuilder() : 145 _current_dump_space(nullptr), 146 _buffer_bottom(nullptr), 147 _last_verified_top(nullptr), 148 _num_dump_regions_used(0), 149 _other_region_used_bytes(0), 150 _requested_static_archive_bottom(nullptr), 151 _requested_static_archive_top(nullptr), 152 _requested_dynamic_archive_bottom(nullptr), 153 _requested_dynamic_archive_top(nullptr), 154 _mapped_static_archive_bottom(nullptr), 155 _mapped_static_archive_top(nullptr), 156 _buffer_to_requested_delta(0), 157 _rw_region("rw", MAX_SHARED_DELTA), 158 _ro_region("ro", MAX_SHARED_DELTA), 159 _ptrmap(mtClassShared), 160 _rw_src_objs(), 161 _ro_src_objs(), 162 _src_obj_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE), 163 _buffered_to_src_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE), 164 _total_closed_heap_region_size(0), 165 _total_open_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 _special_refs = new (mtClassShared) GrowableArray<SpecialRefInfo>(24 * K, mtClassShared); 172 173 assert(_current == nullptr, "must be"); 174 _current = this; 175 } 176 177 ArchiveBuilder::~ArchiveBuilder() { 178 assert(_current == this, "must be"); 179 _current = nullptr; 180 181 clean_up_src_obj_table(); 182 183 for (int i = 0; i < _symbols->length(); i++) { 184 _symbols->at(i)->decrement_refcount(); 185 } 186 187 delete _klasses; 188 delete _symbols; 189 delete _special_refs; 190 if (_shared_rs.is_reserved()) { 191 _shared_rs.release(); 192 } 193 } 194 195 bool ArchiveBuilder::is_dumping_full_module_graph() { 196 return DumpSharedSpaces && MetaspaceShared::use_full_module_graph(); 197 } 198 199 class GatherKlassesAndSymbols : public UniqueMetaspaceClosure { 200 ArchiveBuilder* _builder; 201 202 public: 203 GatherKlassesAndSymbols(ArchiveBuilder* builder) : _builder(builder) {} 204 205 virtual bool do_unique_ref(Ref* ref, bool read_only) { 206 return _builder->gather_klass_and_symbol(ref, read_only); 207 } 208 }; 209 210 bool ArchiveBuilder::gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only) { 211 if (ref->obj() == nullptr) { 212 return false; 213 } 214 if (get_follow_mode(ref) != make_a_copy) { 215 return false; 216 } 217 if (ref->msotype() == MetaspaceObj::ClassType) { 218 Klass* klass = (Klass*)ref->obj(); 219 assert(klass->is_klass(), "must be"); 220 if (!is_excluded(klass)) { 221 _klasses->append(klass); 222 } 223 // See RunTimeClassInfo::get_for() 224 _estimated_metaspaceobj_bytes += align_up(BytesPerWord, SharedSpaceObjectAlignment); 225 } else if (ref->msotype() == MetaspaceObj::SymbolType) { 226 // Make sure the symbol won't be GC'ed while we are dumping the archive. 227 Symbol* sym = (Symbol*)ref->obj(); 228 sym->increment_refcount(); 229 _symbols->append(sym); 230 } 231 232 int bytes = ref->size() * BytesPerWord; 233 _estimated_metaspaceobj_bytes += align_up(bytes, SharedSpaceObjectAlignment); 234 235 return true; // recurse 236 } 237 238 void ArchiveBuilder::gather_klasses_and_symbols() { 239 ResourceMark rm; 240 log_info(cds)("Gathering classes and symbols ... "); 241 GatherKlassesAndSymbols doit(this); 242 iterate_roots(&doit, /*is_relocating_pointers=*/false); 243 #if INCLUDE_CDS_JAVA_HEAP 244 if (is_dumping_full_module_graph()) { 245 ClassLoaderDataShared::iterate_symbols(&doit); 246 } 247 #endif 248 doit.finish(); 249 250 if (DumpSharedSpaces) { 251 // To ensure deterministic contents in the static archive, we need to ensure that 252 // we iterate the MetaspaceObjs in a deterministic order. It doesn't matter where 253 // the MetaspaceObjs are located originally, as they are copied sequentially into 254 // the archive during the iteration. 255 // 256 // The only issue here is that the symbol table and the system directories may be 257 // randomly ordered, so we copy the symbols and klasses into two arrays and sort 258 // them deterministically. 259 // 260 // During -Xshare:dump, the order of Symbol creation is strictly determined by 261 // the SharedClassListFile (class loading is done in a single thread and the JIT 262 // is disabled). Also, Symbols are allocated in monotonically increasing addresses 263 // (see Symbol::operator new(size_t, int)). So if we iterate the Symbols by 264 // ascending address order, we ensure that all Symbols are copied into deterministic 265 // locations in the archive. 266 // 267 // TODO: in the future, if we want to produce deterministic contents in the 268 // dynamic archive, we might need to sort the symbols alphabetically (also see 269 // DynamicArchiveBuilder::sort_methods()). 270 sort_symbols_and_fix_hash(); 271 sort_klasses(); 272 273 // TODO -- we need a proper estimate for the archived modules, etc, 274 // but this should be enough for now 275 _estimated_metaspaceobj_bytes += 200 * 1024 * 1024; 276 } 277 } 278 279 int ArchiveBuilder::compare_symbols_by_address(Symbol** a, Symbol** b) { 280 if (a[0] < b[0]) { 281 return -1; 282 } else { 283 assert(a[0] > b[0], "Duplicated symbol %s unexpected", (*a)->as_C_string()); 284 return 1; 285 } 286 } 287 288 void ArchiveBuilder::sort_symbols_and_fix_hash() { 289 log_info(cds)("Sorting symbols and fixing identity hash ... "); 290 os::init_random(0x12345678); 291 _symbols->sort(compare_symbols_by_address); 292 for (int i = 0; i < _symbols->length(); i++) { 293 assert(_symbols->at(i)->is_permanent(), "archived symbols must be permanent"); 294 _symbols->at(i)->update_identity_hash(); 295 } 296 } 297 298 int ArchiveBuilder::compare_klass_by_name(Klass** a, Klass** b) { 299 return a[0]->name()->fast_compare(b[0]->name()); 300 } 301 302 void ArchiveBuilder::sort_klasses() { 303 log_info(cds)("Sorting classes ... "); 304 _klasses->sort(compare_klass_by_name); 305 } 306 307 size_t ArchiveBuilder::estimate_archive_size() { 308 // size of the symbol table and two dictionaries, plus the RunTimeClassInfo's 309 size_t symbol_table_est = SymbolTable::estimate_size_for_archive(); 310 size_t dictionary_est = SystemDictionaryShared::estimate_size_for_archive(); 311 _estimated_hashtable_bytes = symbol_table_est + dictionary_est; 312 313 size_t total = 0; 314 315 total += _estimated_metaspaceobj_bytes; 316 total += _estimated_hashtable_bytes; 317 318 // allow fragmentation at the end of each dump region 319 total += _total_dump_regions * MetaspaceShared::core_region_alignment(); 320 321 log_info(cds)("_estimated_hashtable_bytes = " SIZE_FORMAT " + " SIZE_FORMAT " = " SIZE_FORMAT, 322 symbol_table_est, dictionary_est, _estimated_hashtable_bytes); 323 log_info(cds)("_estimated_metaspaceobj_bytes = " SIZE_FORMAT, _estimated_metaspaceobj_bytes); 324 log_info(cds)("total estimate bytes = " SIZE_FORMAT, total); 325 326 return align_up(total, MetaspaceShared::core_region_alignment()); 327 } 328 329 address ArchiveBuilder::reserve_buffer() { 330 size_t buffer_size = estimate_archive_size(); 331 ReservedSpace rs(buffer_size, MetaspaceShared::core_region_alignment(), os::vm_page_size()); 332 if (!rs.is_reserved()) { 333 log_error(cds)("Failed to reserve " SIZE_FORMAT " bytes of output buffer.", buffer_size); 334 os::_exit(0); 335 } 336 337 // buffer_bottom is the lowest address of the 2 core regions (rw, ro) when 338 // we are copying the class metadata into the buffer. 339 address buffer_bottom = (address)rs.base(); 340 log_info(cds)("Reserved output buffer space at " PTR_FORMAT " [" SIZE_FORMAT " bytes]", 341 p2i(buffer_bottom), buffer_size); 342 _shared_rs = rs; 343 344 _buffer_bottom = buffer_bottom; 345 _last_verified_top = buffer_bottom; 346 _current_dump_space = &_rw_region; 347 _num_dump_regions_used = 1; 348 _other_region_used_bytes = 0; 349 _current_dump_space->init(&_shared_rs, &_shared_vs); 350 351 ArchivePtrMarker::initialize(&_ptrmap, &_shared_vs); 352 353 // The bottom of the static archive should be mapped at this address by default. 354 _requested_static_archive_bottom = (address)MetaspaceShared::requested_base_address(); 355 356 // The bottom of the archive (that I am writing now) should be mapped at this address by default. 357 address my_archive_requested_bottom; 358 359 if (DumpSharedSpaces) { 360 my_archive_requested_bottom = _requested_static_archive_bottom; 361 } else { 362 _mapped_static_archive_bottom = (address)MetaspaceObj::shared_metaspace_base(); 363 _mapped_static_archive_top = (address)MetaspaceObj::shared_metaspace_top(); 364 assert(_mapped_static_archive_top >= _mapped_static_archive_bottom, "must be"); 365 size_t static_archive_size = _mapped_static_archive_top - _mapped_static_archive_bottom; 366 367 // At run time, we will mmap the dynamic archive at my_archive_requested_bottom 368 _requested_static_archive_top = _requested_static_archive_bottom + static_archive_size; 369 my_archive_requested_bottom = align_up(_requested_static_archive_top, MetaspaceShared::core_region_alignment()); 370 371 _requested_dynamic_archive_bottom = my_archive_requested_bottom; 372 } 373 374 _buffer_to_requested_delta = my_archive_requested_bottom - _buffer_bottom; 375 376 address my_archive_requested_top = my_archive_requested_bottom + buffer_size; 377 if (my_archive_requested_bottom < _requested_static_archive_bottom || 378 my_archive_requested_top <= _requested_static_archive_bottom) { 379 // Size overflow. 380 log_error(cds)("my_archive_requested_bottom = " INTPTR_FORMAT, p2i(my_archive_requested_bottom)); 381 log_error(cds)("my_archive_requested_top = " INTPTR_FORMAT, p2i(my_archive_requested_top)); 382 log_error(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is too high. " 383 "Please rerun java -Xshare:dump with a lower value", p2i(_requested_static_archive_bottom)); 384 os::_exit(0); 385 } 386 387 if (DumpSharedSpaces) { 388 // We don't want any valid object to be at the very bottom of the archive. 389 // See ArchivePtrMarker::mark_pointer(). 390 rw_region()->allocate(16); 391 } 392 393 return buffer_bottom; 394 } 395 396 void ArchiveBuilder::iterate_sorted_roots(MetaspaceClosure* it, bool is_relocating_pointers) { 397 int i; 398 399 if (!is_relocating_pointers) { 400 // Don't relocate _symbol, so we can safely call decrement_refcount on the 401 // original symbols. 402 int num_symbols = _symbols->length(); 403 for (i = 0; i < num_symbols; i++) { 404 it->push(_symbols->adr_at(i)); 405 } 406 } 407 408 int num_klasses = _klasses->length(); 409 for (i = 0; i < num_klasses; i++) { 410 it->push(_klasses->adr_at(i)); 411 } 412 413 iterate_roots(it, is_relocating_pointers); 414 } 415 416 class GatherSortedSourceObjs : public MetaspaceClosure { 417 ArchiveBuilder* _builder; 418 419 public: 420 GatherSortedSourceObjs(ArchiveBuilder* builder) : _builder(builder) {} 421 422 virtual bool do_ref(Ref* ref, bool read_only) { 423 return _builder->gather_one_source_obj(enclosing_ref(), ref, read_only); 424 } 425 426 virtual void push_special(SpecialRef type, Ref* ref, intptr_t* p) { 427 assert(type == _method_entry_ref, "only special type allowed for now"); 428 address src_obj = ref->obj(); 429 size_t field_offset = pointer_delta(p, src_obj, sizeof(u1)); 430 _builder->add_special_ref(type, src_obj, field_offset); 431 }; 432 433 virtual void do_pending_ref(Ref* ref) { 434 if (ref->obj() != nullptr) { 435 _builder->remember_embedded_pointer_in_copied_obj(enclosing_ref(), ref); 436 } 437 } 438 }; 439 440 bool ArchiveBuilder::gather_one_source_obj(MetaspaceClosure::Ref* enclosing_ref, 441 MetaspaceClosure::Ref* ref, bool read_only) { 442 address src_obj = ref->obj(); 443 if (src_obj == nullptr) { 444 return false; 445 } 446 ref->set_keep_after_pushing(); 447 remember_embedded_pointer_in_copied_obj(enclosing_ref, ref); 448 449 FollowMode follow_mode = get_follow_mode(ref); 450 SourceObjInfo src_info(ref, read_only, follow_mode); 451 bool created; 452 SourceObjInfo* p = _src_obj_table.put_if_absent(src_obj, src_info, &created); 453 if (created) { 454 if (_src_obj_table.maybe_grow()) { 455 log_info(cds, hashtables)("Expanded _src_obj_table table to %d", _src_obj_table.table_size()); 456 } 457 } 458 459 assert(p->read_only() == src_info.read_only(), "must be"); 460 461 if (created && src_info.should_copy()) { 462 ref->set_user_data((void*)p); 463 if (read_only) { 464 _ro_src_objs.append(enclosing_ref, p); 465 } else { 466 _rw_src_objs.append(enclosing_ref, p); 467 } 468 return true; // Need to recurse into this ref only if we are copying it 469 } else { 470 return false; 471 } 472 } 473 474 void ArchiveBuilder::add_special_ref(MetaspaceClosure::SpecialRef type, address src_obj, size_t field_offset) { 475 _special_refs->append(SpecialRefInfo(type, src_obj, field_offset)); 476 } 477 478 void ArchiveBuilder::remember_embedded_pointer_in_copied_obj(MetaspaceClosure::Ref* enclosing_ref, 479 MetaspaceClosure::Ref* ref) { 480 assert(ref->obj() != nullptr, "should have checked"); 481 482 if (enclosing_ref != nullptr) { 483 SourceObjInfo* src_info = (SourceObjInfo*)enclosing_ref->user_data(); 484 if (src_info == nullptr) { 485 // source objects of point_to_it/set_to_null types are not copied 486 // so we don't need to remember their pointers. 487 } else { 488 if (src_info->read_only()) { 489 _ro_src_objs.remember_embedded_pointer(src_info, ref); 490 } else { 491 _rw_src_objs.remember_embedded_pointer(src_info, ref); 492 } 493 } 494 } 495 } 496 497 void ArchiveBuilder::gather_source_objs() { 498 ResourceMark rm; 499 log_info(cds)("Gathering all archivable objects ... "); 500 gather_klasses_and_symbols(); 501 GatherSortedSourceObjs doit(this); 502 iterate_sorted_roots(&doit, /*is_relocating_pointers=*/false); 503 doit.finish(); 504 } 505 506 bool ArchiveBuilder::is_excluded(Klass* klass) { 507 if (klass->is_instance_klass()) { 508 InstanceKlass* ik = InstanceKlass::cast(klass); 509 return SystemDictionaryShared::is_excluded_class(ik); 510 } else if (klass->is_objArray_klass()) { 511 if (DynamicDumpSharedSpaces) { 512 // Don't support archiving of array klasses for now (WHY???) 513 return true; 514 } 515 Klass* bottom = ObjArrayKlass::cast(klass)->bottom_klass(); 516 if (bottom->is_instance_klass()) { 517 return SystemDictionaryShared::is_excluded_class(InstanceKlass::cast(bottom)); 518 } 519 } 520 521 return false; 522 } 523 524 ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref *ref) { 525 address obj = ref->obj(); 526 if (MetaspaceShared::is_in_shared_metaspace(obj)) { 527 // Don't dump existing shared metadata again. 528 return point_to_it; 529 } else if (ref->msotype() == MetaspaceObj::MethodDataType || 530 ref->msotype() == MetaspaceObj::MethodCountersType) { 531 return set_to_null; 532 } else { 533 if (ref->msotype() == MetaspaceObj::ClassType) { 534 Klass* klass = (Klass*)ref->obj(); 535 assert(klass->is_klass(), "must be"); 536 if (is_excluded(klass)) { 537 ResourceMark rm; 538 log_debug(cds, dynamic)("Skipping class (excluded): %s", klass->external_name()); 539 return set_to_null; 540 } 541 } 542 543 return make_a_copy; 544 } 545 } 546 547 void ArchiveBuilder::start_dump_space(DumpRegion* next) { 548 address bottom = _last_verified_top; 549 address top = (address)(current_dump_space()->top()); 550 _other_region_used_bytes += size_t(top - bottom); 551 552 current_dump_space()->pack(next); 553 _current_dump_space = next; 554 _num_dump_regions_used ++; 555 556 _last_verified_top = (address)(current_dump_space()->top()); 557 } 558 559 void ArchiveBuilder::verify_estimate_size(size_t estimate, const char* which) { 560 address bottom = _last_verified_top; 561 address top = (address)(current_dump_space()->top()); 562 size_t used = size_t(top - bottom) + _other_region_used_bytes; 563 int diff = int(estimate) - int(used); 564 565 log_info(cds)("%s estimate = " SIZE_FORMAT " used = " SIZE_FORMAT "; diff = %d bytes", which, estimate, used, diff); 566 assert(diff >= 0, "Estimate is too small"); 567 568 _last_verified_top = top; 569 _other_region_used_bytes = 0; 570 } 571 572 void ArchiveBuilder::dump_rw_metadata() { 573 ResourceMark rm; 574 log_info(cds)("Allocating RW objects ... "); 575 make_shallow_copies(&_rw_region, &_rw_src_objs); 576 577 #if INCLUDE_CDS_JAVA_HEAP 578 if (is_dumping_full_module_graph()) { 579 // Archive the ModuleEntry's and PackageEntry's of the 3 built-in loaders 580 char* start = rw_region()->top(); 581 ClassLoaderDataShared::allocate_archived_tables(); 582 alloc_stats()->record_modules(rw_region()->top() - start, /*read_only*/false); 583 } 584 #endif 585 } 586 587 void ArchiveBuilder::dump_ro_metadata() { 588 ResourceMark rm; 589 log_info(cds)("Allocating RO objects ... "); 590 591 start_dump_space(&_ro_region); 592 make_shallow_copies(&_ro_region, &_ro_src_objs); 593 594 #if INCLUDE_CDS_JAVA_HEAP 595 if (is_dumping_full_module_graph()) { 596 char* start = ro_region()->top(); 597 ClassLoaderDataShared::init_archived_tables(); 598 alloc_stats()->record_modules(ro_region()->top() - start, /*read_only*/true); 599 } 600 #endif 601 } 602 603 void ArchiveBuilder::make_shallow_copies(DumpRegion *dump_region, 604 const ArchiveBuilder::SourceObjList* src_objs) { 605 for (int i = 0; i < src_objs->objs()->length(); i++) { 606 make_shallow_copy(dump_region, src_objs->objs()->at(i)); 607 } 608 log_info(cds)("done (%d objects)", src_objs->objs()->length()); 609 } 610 611 void ArchiveBuilder::make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info) { 612 MetaspaceClosure::Ref* ref = src_info->ref(); 613 address src = ref->obj(); 614 int bytes = src_info->size_in_bytes(); 615 char* dest; 616 char* oldtop; 617 char* newtop; 618 619 oldtop = dump_region->top(); 620 if (ref->msotype() == MetaspaceObj::ClassType) { 621 // Save a pointer immediate in front of an InstanceKlass, so 622 // we can do a quick lookup from InstanceKlass* -> RunTimeClassInfo* 623 // without building another hashtable. See RunTimeClassInfo::get_for() 624 // in systemDictionaryShared.cpp. 625 Klass* klass = (Klass*)src; 626 if (klass->is_instance_klass()) { 627 SystemDictionaryShared::validate_before_archiving(InstanceKlass::cast(klass)); 628 dump_region->allocate(sizeof(address)); 629 } 630 } 631 dest = dump_region->allocate(bytes); 632 newtop = dump_region->top(); 633 634 memcpy(dest, src, bytes); 635 { 636 bool created; 637 _buffered_to_src_table.put_if_absent((address)dest, src, &created); 638 assert(created, "must be"); 639 if (_buffered_to_src_table.maybe_grow()) { 640 log_info(cds, hashtables)("Expanded _buffered_to_src_table table to %d", _buffered_to_src_table.table_size()); 641 } 642 } 643 644 intptr_t* archived_vtable = CppVtables::get_archived_vtable(ref->msotype(), (address)dest); 645 if (archived_vtable != nullptr) { 646 *(address*)dest = (address)archived_vtable; 647 ArchivePtrMarker::mark_pointer((address*)dest); 648 } 649 650 log_trace(cds)("Copy: " PTR_FORMAT " ==> " PTR_FORMAT " %d", p2i(src), p2i(dest), bytes); 651 src_info->set_buffered_addr((address)dest); 652 653 _alloc_stats.record(ref->msotype(), int(newtop - oldtop), src_info->read_only()); 654 } 655 656 address ArchiveBuilder::get_buffered_addr(address src_addr) const { 657 SourceObjInfo* p = _src_obj_table.get(src_addr); 658 assert(p != nullptr, "must be"); 659 660 return p->buffered_addr(); 661 } 662 663 address ArchiveBuilder::get_source_addr(address buffered_addr) const { 664 assert(is_in_buffer_space(buffered_addr), "must be"); 665 address* src_p = _buffered_to_src_table.get(buffered_addr); 666 assert(src_p != nullptr && *src_p != nullptr, "must be"); 667 return *src_p; 668 } 669 670 void ArchiveBuilder::relocate_embedded_pointers(ArchiveBuilder::SourceObjList* src_objs) { 671 for (int i = 0; i < src_objs->objs()->length(); i++) { 672 src_objs->relocate(i, this); 673 } 674 } 675 676 void ArchiveBuilder::update_special_refs() { 677 for (int i = 0; i < _special_refs->length(); i++) { 678 SpecialRefInfo s = _special_refs->at(i); 679 size_t field_offset = s.field_offset(); 680 address src_obj = s.src_obj(); 681 address dst_obj = get_buffered_addr(src_obj); 682 intptr_t* src_p = (intptr_t*)(src_obj + field_offset); 683 intptr_t* dst_p = (intptr_t*)(dst_obj + field_offset); 684 assert(s.type() == MetaspaceClosure::_method_entry_ref, "only special type allowed for now"); 685 686 assert(*src_p == *dst_p, "must be a copy"); 687 ArchivePtrMarker::mark_pointer((address*)dst_p); 688 } 689 } 690 691 class RefRelocator: public MetaspaceClosure { 692 ArchiveBuilder* _builder; 693 694 public: 695 RefRelocator(ArchiveBuilder* builder) : _builder(builder) {} 696 697 virtual bool do_ref(Ref* ref, bool read_only) { 698 if (ref->not_null()) { 699 ref->update(_builder->get_buffered_addr(ref->obj())); 700 ArchivePtrMarker::mark_pointer(ref->addr()); 701 } 702 return false; // Do not recurse. 703 } 704 }; 705 706 void ArchiveBuilder::relocate_roots() { 707 log_info(cds)("Relocating external roots ... "); 708 ResourceMark rm; 709 RefRelocator doit(this); 710 iterate_sorted_roots(&doit, /*is_relocating_pointers=*/true); 711 doit.finish(); 712 log_info(cds)("done"); 713 } 714 715 void ArchiveBuilder::relocate_metaspaceobj_embedded_pointers() { 716 log_info(cds)("Relocating embedded pointers in core regions ... "); 717 relocate_embedded_pointers(&_rw_src_objs); 718 relocate_embedded_pointers(&_ro_src_objs); 719 update_special_refs(); 720 } 721 722 // We must relocate vmClasses::_klasses[] only after we have copied the 723 // java objects in during dump_java_heap_objects(): during the object copy, we operate on 724 // old objects which assert that their klass is the original klass. 725 void ArchiveBuilder::relocate_vm_classes() { 726 log_info(cds)("Relocating vmClasses::_klasses[] ... "); 727 ResourceMark rm; 728 RefRelocator doit(this); 729 vmClasses::metaspace_pointers_do(&doit); 730 } 731 732 void ArchiveBuilder::make_klasses_shareable() { 733 int num_instance_klasses = 0; 734 int num_boot_klasses = 0; 735 int num_platform_klasses = 0; 736 int num_app_klasses = 0; 737 int num_hidden_klasses = 0; 738 int num_unlinked_klasses = 0; 739 int num_unregistered_klasses = 0; 740 int num_obj_array_klasses = 0; 741 int num_type_array_klasses = 0; 742 743 for (int i = 0; i < klasses()->length(); i++) { 744 const char* type; 745 const char* unlinked = ""; 746 const char* hidden = ""; 747 const char* generated = ""; 748 Klass* k = klasses()->at(i); 749 k->remove_java_mirror(); 750 if (k->is_objArray_klass()) { 751 // InstanceKlass and TypeArrayKlass will in turn call remove_unshareable_info 752 // on their array classes. 753 num_obj_array_klasses ++; 754 type = "array"; 755 } else if (k->is_typeArray_klass()) { 756 num_type_array_klasses ++; 757 type = "array"; 758 k->remove_unshareable_info(); 759 } else { 760 assert(k->is_instance_klass(), " must be"); 761 num_instance_klasses ++; 762 InstanceKlass* ik = InstanceKlass::cast(k); 763 if (DynamicDumpSharedSpaces) { 764 // For static dump, class loader type are already set. 765 ik->assign_class_loader_type(); 766 } 767 if (ik->is_shared_boot_class()) { 768 type = "boot"; 769 num_boot_klasses ++; 770 } else if (ik->is_shared_platform_class()) { 771 type = "plat"; 772 num_platform_klasses ++; 773 } else if (ik->is_shared_app_class()) { 774 type = "app"; 775 num_app_klasses ++; 776 } else { 777 assert(ik->is_shared_unregistered_class(), "must be"); 778 type = "unreg"; 779 num_unregistered_klasses ++; 780 } 781 782 if (!ik->is_linked()) { 783 num_unlinked_klasses ++; 784 unlinked = " ** unlinked"; 785 } 786 787 if (ik->is_hidden()) { 788 num_hidden_klasses ++; 789 hidden = " ** hidden"; 790 } 791 792 if (ik->is_generated_shared_class()) { 793 generated = " ** generated"; 794 } 795 MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread::current(), ik); 796 ik->remove_unshareable_info(); 797 } 798 799 if (log_is_enabled(Debug, cds, class)) { 800 ResourceMark rm; 801 log_debug(cds, class)("klasses[%5d] = " PTR_FORMAT " %-5s %s%s%s%s", i, 802 p2i(to_requested(k)), type, k->external_name(), 803 hidden, unlinked, generated); 804 } 805 } 806 807 log_info(cds)("Number of classes %d", num_instance_klasses + num_obj_array_klasses + num_type_array_klasses); 808 log_info(cds)(" instance classes = %5d", num_instance_klasses); 809 log_info(cds)(" boot = %5d", num_boot_klasses); 810 log_info(cds)(" app = %5d", num_app_klasses); 811 log_info(cds)(" platform = %5d", num_platform_klasses); 812 log_info(cds)(" unregistered = %5d", num_unregistered_klasses); 813 log_info(cds)(" (hidden) = %5d", num_hidden_klasses); 814 log_info(cds)(" (unlinked) = %5d", num_unlinked_klasses); 815 log_info(cds)(" obj array classes = %5d", num_obj_array_klasses); 816 log_info(cds)(" type array classes = %5d", num_type_array_klasses); 817 log_info(cds)(" symbols = %5d", _symbols->length()); 818 } 819 820 uintx ArchiveBuilder::buffer_to_offset(address p) const { 821 address requested_p = to_requested(p); 822 assert(requested_p >= _requested_static_archive_bottom, "must be"); 823 return requested_p - _requested_static_archive_bottom; 824 } 825 826 uintx ArchiveBuilder::any_to_offset(address p) const { 827 if (is_in_mapped_static_archive(p)) { 828 assert(DynamicDumpSharedSpaces, "must be"); 829 return p - _mapped_static_archive_bottom; 830 } 831 return buffer_to_offset(p); 832 } 833 834 narrowKlass ArchiveBuilder::get_requested_narrow_klass(Klass* k) { 835 assert(DumpSharedSpaces, "sanity"); 836 k = get_buffered_klass(k); 837 Klass* requested_k = to_requested(k); 838 return CompressedKlassPointers::encode_not_null(requested_k, _requested_static_archive_bottom); 839 } 840 841 // RelocateBufferToRequested --- Relocate all the pointers in rw/ro, 842 // so that the archive can be mapped to the "requested" location without runtime relocation. 843 // 844 // - See ArchiveBuilder header for the definition of "buffer", "mapped" and "requested" 845 // - ArchivePtrMarker::ptrmap() marks all the pointers in the rw/ro regions 846 // - Every pointer must have one of the following values: 847 // [a] nullptr: 848 // No relocation is needed. Remove this pointer from ptrmap so we don't need to 849 // consider it at runtime. 850 // [b] Points into an object X which is inside the buffer: 851 // Adjust this pointer by _buffer_to_requested_delta, so it points to X 852 // when the archive is mapped at the requested location. 853 // [c] Points into an object Y which is inside mapped static archive: 854 // - This happens only during dynamic dump 855 // - Adjust this pointer by _mapped_to_requested_static_archive_delta, 856 // so it points to Y when the static archive is mapped at the requested location. 857 template <bool STATIC_DUMP> 858 class RelocateBufferToRequested : public BitMapClosure { 859 ArchiveBuilder* _builder; 860 address _buffer_bottom; 861 intx _buffer_to_requested_delta; 862 intx _mapped_to_requested_static_archive_delta; 863 size_t _max_non_null_offset; 864 865 public: 866 RelocateBufferToRequested(ArchiveBuilder* builder) { 867 _builder = builder; 868 _buffer_bottom = _builder->buffer_bottom(); 869 _buffer_to_requested_delta = builder->buffer_to_requested_delta(); 870 _mapped_to_requested_static_archive_delta = builder->requested_static_archive_bottom() - builder->mapped_static_archive_bottom(); 871 _max_non_null_offset = 0; 872 873 address bottom = _builder->buffer_bottom(); 874 address top = _builder->buffer_top(); 875 address new_bottom = bottom + _buffer_to_requested_delta; 876 address new_top = top + _buffer_to_requested_delta; 877 log_debug(cds)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT "] to " 878 "[" INTPTR_FORMAT " - " INTPTR_FORMAT "]", 879 p2i(bottom), p2i(top), 880 p2i(new_bottom), p2i(new_top)); 881 } 882 883 bool do_bit(size_t offset) { 884 address* p = (address*)_buffer_bottom + offset; 885 assert(_builder->is_in_buffer_space(p), "pointer must live in buffer space"); 886 887 if (*p == nullptr) { 888 // todo -- clear bit, etc 889 ArchivePtrMarker::ptrmap()->clear_bit(offset); 890 } else { 891 if (STATIC_DUMP) { 892 assert(_builder->is_in_buffer_space(*p), "old pointer must point inside buffer space"); 893 *p += _buffer_to_requested_delta; 894 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive"); 895 } else { 896 if (_builder->is_in_buffer_space(*p)) { 897 *p += _buffer_to_requested_delta; 898 // assert is in requested dynamic archive 899 } else { 900 assert(_builder->is_in_mapped_static_archive(*p), "old pointer must point inside buffer space or mapped static archive"); 901 *p += _mapped_to_requested_static_archive_delta; 902 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive"); 903 } 904 } 905 _max_non_null_offset = offset; 906 } 907 908 return true; // keep iterating 909 } 910 911 void doit() { 912 ArchivePtrMarker::ptrmap()->iterate(this); 913 ArchivePtrMarker::compact(_max_non_null_offset); 914 } 915 }; 916 917 918 void ArchiveBuilder::relocate_to_requested() { 919 ro_region()->pack(); 920 921 size_t my_archive_size = buffer_top() - buffer_bottom(); 922 923 if (DumpSharedSpaces) { 924 _requested_static_archive_top = _requested_static_archive_bottom + my_archive_size; 925 RelocateBufferToRequested<true> patcher(this); 926 patcher.doit(); 927 } else { 928 assert(DynamicDumpSharedSpaces, "must be"); 929 _requested_dynamic_archive_top = _requested_dynamic_archive_bottom + my_archive_size; 930 RelocateBufferToRequested<false> patcher(this); 931 patcher.doit(); 932 } 933 } 934 935 // Write detailed info to a mapfile to analyze contents of the archive. 936 // static dump: 937 // java -Xshare:dump -Xlog:cds+map=trace:file=cds.map:none:filesize=0 938 // dynamic dump: 939 // java -cp MyApp.jar -XX:ArchiveClassesAtExit=MyApp.jsa \ 940 // -Xlog:cds+map=trace:file=cds.map:none:filesize=0 MyApp 941 // 942 // We need to do some address translation because the buffers used at dump time may be mapped to 943 // a different location at runtime. At dump time, the buffers may be at arbitrary locations 944 // picked by the OS. At runtime, we try to map at a fixed location (SharedBaseAddress). For 945 // consistency, we log everything using runtime addresses. 946 class ArchiveBuilder::CDSMapLogger : AllStatic { 947 static intx buffer_to_runtime_delta() { 948 // Translate the buffers used by the RW/RO regions to their eventual (requested) locations 949 // at runtime. 950 return ArchiveBuilder::current()->buffer_to_requested_delta(); 951 } 952 953 // rw/ro regions only 954 static void log_metaspace_region(const char* name, DumpRegion* region, 955 const ArchiveBuilder::SourceObjList* src_objs) { 956 address region_base = address(region->base()); 957 address region_top = address(region->top()); 958 log_region(name, region_base, region_top, region_base + buffer_to_runtime_delta()); 959 log_metaspace_objects(region, src_objs); 960 } 961 962 #define _LOG_PREFIX PTR_FORMAT ": @@ %-17s %d" 963 964 static void log_klass(Klass* k, address runtime_dest, const char* type_name, int bytes, Thread* current) { 965 ResourceMark rm(current); 966 log_debug(cds, map)(_LOG_PREFIX " %s", 967 p2i(runtime_dest), type_name, bytes, k->external_name()); 968 } 969 static void log_method(Method* m, address runtime_dest, const char* type_name, int bytes, Thread* current) { 970 ResourceMark rm(current); 971 log_debug(cds, map)(_LOG_PREFIX " %s", 972 p2i(runtime_dest), type_name, bytes, m->external_name()); 973 } 974 975 // rw/ro regions only 976 static void log_metaspace_objects(DumpRegion* region, const ArchiveBuilder::SourceObjList* src_objs) { 977 address last_obj_base = address(region->base()); 978 address last_obj_end = address(region->base()); 979 address region_end = address(region->end()); 980 Thread* current = Thread::current(); 981 for (int i = 0; i < src_objs->objs()->length(); i++) { 982 SourceObjInfo* src_info = src_objs->at(i); 983 address src = src_info->source_addr(); 984 address dest = src_info->buffered_addr(); 985 log_data(last_obj_base, dest, last_obj_base + buffer_to_runtime_delta()); 986 address runtime_dest = dest + buffer_to_runtime_delta(); 987 int bytes = src_info->size_in_bytes(); 988 989 MetaspaceObj::Type type = src_info->msotype(); 990 const char* type_name = MetaspaceObj::type_name(type); 991 992 switch (type) { 993 case MetaspaceObj::ClassType: 994 log_klass((Klass*)src, runtime_dest, type_name, bytes, current); 995 break; 996 case MetaspaceObj::ConstantPoolType: 997 log_klass(((ConstantPool*)src)->pool_holder(), 998 runtime_dest, type_name, bytes, current); 999 break; 1000 case MetaspaceObj::ConstantPoolCacheType: 1001 log_klass(((ConstantPoolCache*)src)->constant_pool()->pool_holder(), 1002 runtime_dest, type_name, bytes, current); 1003 break; 1004 case MetaspaceObj::MethodType: 1005 log_method((Method*)src, runtime_dest, type_name, bytes, current); 1006 break; 1007 case MetaspaceObj::ConstMethodType: 1008 log_method(((ConstMethod*)src)->method(), runtime_dest, type_name, bytes, current); 1009 break; 1010 case MetaspaceObj::SymbolType: 1011 { 1012 ResourceMark rm(current); 1013 Symbol* s = (Symbol*)src; 1014 log_debug(cds, map)(_LOG_PREFIX " %s", p2i(runtime_dest), type_name, bytes, 1015 s->as_quoted_ascii()); 1016 } 1017 break; 1018 default: 1019 log_debug(cds, map)(_LOG_PREFIX, p2i(runtime_dest), type_name, bytes); 1020 break; 1021 } 1022 1023 last_obj_base = dest; 1024 last_obj_end = dest + bytes; 1025 } 1026 1027 log_data(last_obj_base, last_obj_end, last_obj_base + buffer_to_runtime_delta()); 1028 if (last_obj_end < region_end) { 1029 log_debug(cds, map)(PTR_FORMAT ": @@ Misc data " SIZE_FORMAT " bytes", 1030 p2i(last_obj_end + buffer_to_runtime_delta()), 1031 size_t(region_end - last_obj_end)); 1032 log_data(last_obj_end, region_end, last_obj_end + buffer_to_runtime_delta()); 1033 } 1034 } 1035 1036 #undef _LOG_PREFIX 1037 1038 // Log information about a region, whose address at dump time is [base .. top). At 1039 // runtime, this region will be mapped to requested_base. requested_base is 0 if this 1040 // region will be mapped at os-selected addresses (such as the bitmap region), or will 1041 // be accessed with os::read (the header). 1042 // 1043 // Note: across -Xshare:dump runs, base may be different, but requested_base should 1044 // be the same as the archive contents should be deterministic. 1045 static void log_region(const char* name, address base, address top, address requested_base) { 1046 size_t size = top - base; 1047 base = requested_base; 1048 top = requested_base + size; 1049 log_info(cds, map)("[%-18s " PTR_FORMAT " - " PTR_FORMAT " " SIZE_FORMAT_W(9) " bytes]", 1050 name, p2i(base), p2i(top), size); 1051 } 1052 1053 #if INCLUDE_CDS_JAVA_HEAP 1054 // open and closed archive regions 1055 static void log_heap_regions(const char* which, GrowableArray<MemRegion> *regions) { 1056 for (int i = 0; i < regions->length(); i++) { 1057 address start = address(regions->at(i).start()); 1058 address end = address(regions->at(i).end()); 1059 log_region(which, start, end, to_requested(start)); 1060 1061 while (start < end) { 1062 size_t byte_size; 1063 oop original_oop = ArchiveHeapWriter::buffered_addr_to_source_obj(start); 1064 if (original_oop != nullptr) { 1065 ResourceMark rm; 1066 log_info(cds, map)(PTR_FORMAT ": @@ Object %s", 1067 p2i(to_requested(start)), original_oop->klass()->external_name()); 1068 byte_size = original_oop->size() * BytesPerWord; 1069 } else if (start == ArchiveHeapWriter::buffered_heap_roots_addr()) { 1070 // HeapShared::roots() is copied specially so it doesn't exist in 1071 // HeapShared::OriginalObjectTable. See HeapShared::copy_roots(). 1072 log_info(cds, map)(PTR_FORMAT ": @@ Object HeapShared::roots (ObjArray)", 1073 p2i(to_requested(start))); 1074 byte_size = ArchiveHeapWriter::heap_roots_word_size() * BytesPerWord; 1075 } else { 1076 // We have reached the end of the region 1077 break; 1078 } 1079 address oop_end = start + byte_size; 1080 log_data(start, oop_end, to_requested(start), /*is_heap=*/true); 1081 start = oop_end; 1082 } 1083 if (start < end) { 1084 log_info(cds, map)(PTR_FORMAT ": @@ Unused heap space " SIZE_FORMAT " bytes", 1085 p2i(to_requested(start)), size_t(end - start)); 1086 log_data(start, end, to_requested(start), /*is_heap=*/true); 1087 } 1088 } 1089 } 1090 static address to_requested(address p) { 1091 return ArchiveHeapWriter::buffered_addr_to_requested_addr(p); 1092 } 1093 #endif 1094 1095 // Log all the data [base...top). Pretend that the base address 1096 // will be mapped to requested_base at run-time. 1097 static void log_data(address base, address top, address requested_base, bool is_heap = false) { 1098 assert(top >= base, "must be"); 1099 1100 LogStreamHandle(Trace, cds, map) lsh; 1101 if (lsh.is_enabled()) { 1102 int unitsize = sizeof(address); 1103 if (is_heap && UseCompressedOops) { 1104 // This makes the compressed oop pointers easier to read, but 1105 // longs and doubles will be split into two words. 1106 unitsize = sizeof(narrowOop); 1107 } 1108 os::print_hex_dump(&lsh, base, top, unitsize, 32, requested_base); 1109 } 1110 } 1111 1112 static void log_header(FileMapInfo* mapinfo) { 1113 LogStreamHandle(Info, cds, map) lsh; 1114 if (lsh.is_enabled()) { 1115 mapinfo->print(&lsh); 1116 } 1117 } 1118 1119 public: 1120 static void log(ArchiveBuilder* builder, FileMapInfo* mapinfo, 1121 GrowableArray<MemRegion> *closed_heap_regions, 1122 GrowableArray<MemRegion> *open_heap_regions, 1123 char* bitmap, size_t bitmap_size_in_bytes) { 1124 log_info(cds, map)("%s CDS archive map for %s", DumpSharedSpaces ? "Static" : "Dynamic", mapinfo->full_path()); 1125 1126 address header = address(mapinfo->header()); 1127 address header_end = header + mapinfo->header()->header_size(); 1128 log_region("header", header, header_end, 0); 1129 log_header(mapinfo); 1130 log_data(header, header_end, 0); 1131 1132 DumpRegion* rw_region = &builder->_rw_region; 1133 DumpRegion* ro_region = &builder->_ro_region; 1134 1135 log_metaspace_region("rw region", rw_region, &builder->_rw_src_objs); 1136 log_metaspace_region("ro region", ro_region, &builder->_ro_src_objs); 1137 1138 address bitmap_end = address(bitmap + bitmap_size_in_bytes); 1139 log_region("bitmap", address(bitmap), bitmap_end, 0); 1140 log_data((address)bitmap, bitmap_end, 0); 1141 1142 #if INCLUDE_CDS_JAVA_HEAP 1143 if (closed_heap_regions != nullptr) { 1144 log_heap_regions("closed heap region", closed_heap_regions); 1145 } 1146 if (open_heap_regions != nullptr) { 1147 log_heap_regions("open heap region", open_heap_regions); 1148 } 1149 #endif 1150 1151 log_info(cds, map)("[End of CDS archive map]"); 1152 } 1153 }; // end ArchiveBuilder::CDSMapLogger 1154 1155 void ArchiveBuilder::print_stats() { 1156 _alloc_stats.print_stats(int(_ro_region.used()), int(_rw_region.used())); 1157 } 1158 1159 void ArchiveBuilder::clean_up_src_obj_table() { 1160 SrcObjTableCleaner cleaner; 1161 _src_obj_table.iterate(&cleaner); 1162 } 1163 1164 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo, 1165 GrowableArray<MemRegion>* closed_heap_regions, 1166 GrowableArray<MemRegion>* open_heap_regions, 1167 GrowableArray<ArchiveHeapBitmapInfo>* closed_heap_bitmaps, 1168 GrowableArray<ArchiveHeapBitmapInfo>* open_heap_bitmaps) { 1169 // Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with 1170 // MetaspaceShared::n_regions (internal to hotspot). 1171 assert(NUM_CDS_REGIONS == MetaspaceShared::n_regions, "sanity"); 1172 1173 write_region(mapinfo, MetaspaceShared::rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false); 1174 write_region(mapinfo, MetaspaceShared::ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false); 1175 1176 size_t bitmap_size_in_bytes; 1177 char* bitmap = mapinfo->write_bitmap_region(ArchivePtrMarker::ptrmap(), closed_heap_bitmaps, open_heap_bitmaps, 1178 bitmap_size_in_bytes); 1179 1180 if (closed_heap_regions != nullptr) { 1181 _total_closed_heap_region_size = mapinfo->write_heap_regions( 1182 closed_heap_regions, 1183 closed_heap_bitmaps, 1184 MetaspaceShared::first_closed_heap_region, 1185 MetaspaceShared::max_num_closed_heap_regions); 1186 _total_open_heap_region_size = mapinfo->write_heap_regions( 1187 open_heap_regions, 1188 open_heap_bitmaps, 1189 MetaspaceShared::first_open_heap_region, 1190 MetaspaceShared::max_num_open_heap_regions); 1191 } 1192 1193 print_region_stats(mapinfo, closed_heap_regions, open_heap_regions); 1194 1195 mapinfo->set_requested_base((char*)MetaspaceShared::requested_base_address()); 1196 mapinfo->set_header_crc(mapinfo->compute_header_crc()); 1197 // After this point, we should not write any data into mapinfo->header() since this 1198 // would corrupt its checksum we have calculated before. 1199 mapinfo->write_header(); 1200 mapinfo->close(); 1201 1202 if (log_is_enabled(Info, cds)) { 1203 print_stats(); 1204 } 1205 1206 if (log_is_enabled(Info, cds, map)) { 1207 CDSMapLogger::log(this, mapinfo, closed_heap_regions, open_heap_regions, 1208 bitmap, bitmap_size_in_bytes); 1209 } 1210 CDS_JAVA_HEAP_ONLY(HeapShared::destroy_archived_object_cache()); 1211 FREE_C_HEAP_ARRAY(char, bitmap); 1212 } 1213 1214 void ArchiveBuilder::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) { 1215 mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec); 1216 } 1217 1218 void ArchiveBuilder::print_region_stats(FileMapInfo *mapinfo, 1219 GrowableArray<MemRegion>* closed_heap_regions, 1220 GrowableArray<MemRegion>* open_heap_regions) { 1221 // Print statistics of all the regions 1222 const size_t bitmap_used = mapinfo->region_at(MetaspaceShared::bm)->used(); 1223 const size_t bitmap_reserved = mapinfo->region_at(MetaspaceShared::bm)->used_aligned(); 1224 const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() + 1225 bitmap_reserved + 1226 _total_closed_heap_region_size + 1227 _total_open_heap_region_size; 1228 const size_t total_bytes = _ro_region.used() + _rw_region.used() + 1229 bitmap_used + 1230 _total_closed_heap_region_size + 1231 _total_open_heap_region_size; 1232 const double total_u_perc = percent_of(total_bytes, total_reserved); 1233 1234 _rw_region.print(total_reserved); 1235 _ro_region.print(total_reserved); 1236 1237 print_bitmap_region_stats(bitmap_used, total_reserved); 1238 1239 if (closed_heap_regions != nullptr) { 1240 print_heap_region_stats(closed_heap_regions, "ca", total_reserved); 1241 print_heap_region_stats(open_heap_regions, "oa", total_reserved); 1242 } 1243 1244 log_debug(cds)("total : " SIZE_FORMAT_W(9) " [100.0%% of total] out of " SIZE_FORMAT_W(9) " bytes [%5.1f%% used]", 1245 total_bytes, total_reserved, total_u_perc); 1246 } 1247 1248 void ArchiveBuilder::print_bitmap_region_stats(size_t size, size_t total_size) { 1249 log_debug(cds)("bm space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used]", 1250 size, size/double(total_size)*100.0, size); 1251 } 1252 1253 void ArchiveBuilder::print_heap_region_stats(GrowableArray<MemRegion>* regions, 1254 const char *name, size_t total_size) { 1255 int arr_len = regions == nullptr ? 0 : regions->length(); 1256 for (int i = 0; i < arr_len; i++) { 1257 char* start = (char*)regions->at(i).start(); 1258 size_t size = regions->at(i).byte_size(); 1259 char* top = start + size; 1260 log_debug(cds)("%s%d space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used] at " INTPTR_FORMAT, 1261 name, i, size, size/double(total_size)*100.0, size, p2i(start)); 1262 } 1263 } 1264 1265 void ArchiveBuilder::report_out_of_space(const char* name, size_t needed_bytes) { 1266 // This is highly unlikely to happen on 64-bits because we have reserved a 4GB space. 1267 // On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes 1268 // or so. 1269 _rw_region.print_out_of_space_msg(name, needed_bytes); 1270 _ro_region.print_out_of_space_msg(name, needed_bytes); 1271 1272 vm_exit_during_initialization(err_msg("Unable to allocate from '%s' region", name), 1273 "Please reduce the number of shared classes."); 1274 } 1275 1276 1277 #ifndef PRODUCT 1278 void ArchiveBuilder::assert_is_vm_thread() { 1279 assert(Thread::current()->is_VM_thread(), "ArchiveBuilder should be used only inside the VMThread"); 1280 } 1281 #endif