1 /* 2 * Copyright (c) 2020, 2022, 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/archiveUtils.hpp" 28 #include "cds/cppVtables.hpp" 29 #include "cds/dumpAllocStats.hpp" 30 #include "cds/heapShared.hpp" 31 #include "cds/metaspaceShared.hpp" 32 #include "classfile/classLoaderDataShared.hpp" 33 #include "classfile/symbolTable.hpp" 34 #include "classfile/systemDictionaryShared.hpp" 35 #include "classfile/vmClasses.hpp" 36 #include "interpreter/abstractInterpreter.hpp" 37 #include "logging/log.hpp" 38 #include "logging/logStream.hpp" 39 #include "memory/allStatic.hpp" 40 #include "memory/memRegion.hpp" 41 #include "memory/resourceArea.hpp" 42 #include "oops/instanceKlass.hpp" 43 #include "oops/objArrayKlass.hpp" 44 #include "oops/objArrayOop.inline.hpp" 45 #include "oops/oopHandle.inline.hpp" 46 #include "runtime/arguments.hpp" 47 #include "runtime/globals_extension.hpp" 48 #include "runtime/sharedRuntime.hpp" 49 #include "runtime/thread.hpp" 50 #include "utilities/align.hpp" 51 #include "utilities/bitMap.inline.hpp" 52 #include "utilities/formatBuffer.hpp" 53 #include "utilities/hashtable.inline.hpp" 54 55 ArchiveBuilder* ArchiveBuilder::_current = NULL; 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) { 63 _total_bytes = 0; 64 _objs = new (ResourceObj::C_HEAP, 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 != NULL, "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 _dumped_obj; 114 BitMap::idx_t _start_idx; 115 public: 116 RelocateEmbeddedPointers(ArchiveBuilder* builder, address dumped_obj, BitMap::idx_t start_idx) : 117 _builder(builder), _dumped_obj(dumped_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*)(_dumped_obj + field_offset); 122 123 address old_p = *ptr_loc; 124 address new_p = _builder->get_dumped_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->dumped_addr(), start); 141 _ptrmap.iterate(&relocator, start, end); 142 } 143 144 ArchiveBuilder::ArchiveBuilder() : 145 _current_dump_space(NULL), 146 _buffer_bottom(NULL), 147 _last_verified_top(NULL), 148 _num_dump_regions_used(0), 149 _other_region_used_bytes(0), 150 _requested_static_archive_bottom(NULL), 151 _requested_static_archive_top(NULL), 152 _requested_dynamic_archive_bottom(NULL), 153 _requested_dynamic_archive_top(NULL), 154 _mapped_static_archive_bottom(NULL), 155 _mapped_static_archive_top(NULL), 156 _buffer_to_requested_delta(0), 157 _rw_region("rw", MAX_SHARED_DELTA), 158 _ro_region("ro", MAX_SHARED_DELTA), 159 _rw_src_objs(), 160 _ro_src_objs(), 161 _src_obj_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE), 162 _total_closed_heap_region_size(0), 163 _total_open_heap_region_size(0), 164 _estimated_metaspaceobj_bytes(0), 165 _estimated_hashtable_bytes(0) 166 { 167 _klasses = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<Klass*>(4 * K, mtClassShared); 168 _symbols = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<Symbol*>(256 * K, mtClassShared); 169 _special_refs = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<SpecialRefInfo>(24 * K, mtClassShared); 170 171 assert(_current == NULL, "must be"); 172 _current = this; 173 } 174 175 ArchiveBuilder::~ArchiveBuilder() { 176 assert(_current == this, "must be"); 177 _current = NULL; 178 179 clean_up_src_obj_table(); 180 181 for (int i = 0; i < _symbols->length(); i++) { 182 _symbols->at(i)->decrement_refcount(); 183 } 184 185 delete _klasses; 186 delete _symbols; 187 delete _special_refs; 188 if (_shared_rs.is_reserved()) { 189 _shared_rs.release(); 190 } 191 } 192 193 bool ArchiveBuilder::is_dumping_full_module_graph() { 194 return DumpSharedSpaces && MetaspaceShared::use_full_module_graph(); 195 } 196 197 class GatherKlassesAndSymbols : public UniqueMetaspaceClosure { 198 ArchiveBuilder* _builder; 199 200 public: 201 GatherKlassesAndSymbols(ArchiveBuilder* builder) : _builder(builder) {} 202 203 virtual bool do_unique_ref(Ref* ref, bool read_only) { 204 return _builder->gather_klass_and_symbol(ref, read_only); 205 } 206 }; 207 208 bool ArchiveBuilder::gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only) { 209 if (ref->obj() == NULL) { 210 return false; 211 } 212 if (get_follow_mode(ref) != make_a_copy) { 213 return false; 214 } 215 if (ref->msotype() == MetaspaceObj::ClassType) { 216 Klass* klass = (Klass*)ref->obj(); 217 assert(klass->is_klass(), "must be"); 218 if (!is_excluded(klass)) { 219 _klasses->append(klass); 220 } 221 // See RunTimeClassInfo::get_for() 222 _estimated_metaspaceobj_bytes += align_up(BytesPerWord, SharedSpaceObjectAlignment); 223 } else if (ref->msotype() == MetaspaceObj::SymbolType) { 224 // Make sure the symbol won't be GC'ed while we are dumping the archive. 225 Symbol* sym = (Symbol*)ref->obj(); 226 sym->increment_refcount(); 227 _symbols->append(sym); 228 } 229 230 int bytes = ref->size() * BytesPerWord; 231 _estimated_metaspaceobj_bytes += align_up(bytes, SharedSpaceObjectAlignment); 232 233 return true; // recurse 234 } 235 236 void ArchiveBuilder::gather_klasses_and_symbols() { 237 ResourceMark rm; 238 log_info(cds)("Gathering classes and symbols ... "); 239 GatherKlassesAndSymbols doit(this); 240 iterate_roots(&doit, /*is_relocating_pointers=*/false); 241 #if INCLUDE_CDS_JAVA_HEAP 242 if (is_dumping_full_module_graph()) { 243 ClassLoaderDataShared::iterate_symbols(&doit); 244 } 245 #endif 246 doit.finish(); 247 248 if (DumpSharedSpaces) { 249 // To ensure deterministic contents in the static archive, we need to ensure that 250 // we iterate the MetaspaceObjs in a deterministic order. It doesn't matter where 251 // the MetaspaceObjs are located originally, as they are copied sequentially into 252 // the archive during the iteration. 253 // 254 // The only issue here is that the symbol table and the system directories may be 255 // randomly ordered, so we copy the symbols and klasses into two arrays and sort 256 // them deterministically. 257 // 258 // During -Xshare:dump, the order of Symbol creation is strictly determined by 259 // the SharedClassListFile (class loading is done in a single thread and the JIT 260 // is disabled). Also, Symbols are allocated in monotonically increasing addresses 261 // (see Symbol::operator new(size_t, int)). So if we iterate the Symbols by 262 // ascending address order, we ensure that all Symbols are copied into deterministic 263 // locations in the archive. 264 // 265 // TODO: in the future, if we want to produce deterministic contents in the 266 // dynamic archive, we might need to sort the symbols alphabetically (also see 267 // DynamicArchiveBuilder::sort_methods()). 268 sort_symbols_and_fix_hash(); 269 sort_klasses(); 270 271 // TODO -- we need a proper estimate for the archived modules, etc, 272 // but this should be enough for now 273 _estimated_metaspaceobj_bytes += 200 * 1024 * 1024; 274 } 275 } 276 277 int ArchiveBuilder::compare_symbols_by_address(Symbol** a, Symbol** b) { 278 if (a[0] < b[0]) { 279 return -1; 280 } else { 281 assert(a[0] > b[0], "Duplicated symbol %s unexpected", (*a)->as_C_string()); 282 return 1; 283 } 284 } 285 286 void ArchiveBuilder::sort_symbols_and_fix_hash() { 287 log_info(cds)("Sorting symbols and fixing identity hash ... "); 288 os::init_random(0x12345678); 289 _symbols->sort(compare_symbols_by_address); 290 for (int i = 0; i < _symbols->length(); i++) { 291 assert(_symbols->at(i)->is_permanent(), "archived symbols must be permanent"); 292 _symbols->at(i)->update_identity_hash(); 293 } 294 } 295 296 int ArchiveBuilder::compare_klass_by_name(Klass** a, Klass** b) { 297 return a[0]->name()->fast_compare(b[0]->name()); 298 } 299 300 void ArchiveBuilder::sort_klasses() { 301 log_info(cds)("Sorting classes ... "); 302 _klasses->sort(compare_klass_by_name); 303 } 304 305 size_t ArchiveBuilder::estimate_archive_size() { 306 // size of the symbol table and two dictionaries, plus the RunTimeClassInfo's 307 size_t symbol_table_est = SymbolTable::estimate_size_for_archive(); 308 size_t dictionary_est = SystemDictionaryShared::estimate_size_for_archive(); 309 _estimated_hashtable_bytes = symbol_table_est + dictionary_est; 310 311 size_t total = 0; 312 313 total += _estimated_metaspaceobj_bytes; 314 total += _estimated_hashtable_bytes; 315 316 // allow fragmentation at the end of each dump region 317 total += _total_dump_regions * MetaspaceShared::core_region_alignment(); 318 319 log_info(cds)("_estimated_hashtable_bytes = " SIZE_FORMAT " + " SIZE_FORMAT " = " SIZE_FORMAT, 320 symbol_table_est, dictionary_est, _estimated_hashtable_bytes); 321 log_info(cds)("_estimated_metaspaceobj_bytes = " SIZE_FORMAT, _estimated_metaspaceobj_bytes); 322 log_info(cds)("total estimate bytes = " SIZE_FORMAT, total); 323 324 return align_up(total, MetaspaceShared::core_region_alignment()); 325 } 326 327 address ArchiveBuilder::reserve_buffer() { 328 size_t buffer_size = estimate_archive_size(); 329 ReservedSpace rs(buffer_size, MetaspaceShared::core_region_alignment(), os::vm_page_size()); 330 if (!rs.is_reserved()) { 331 log_error(cds)("Failed to reserve " SIZE_FORMAT " bytes of output buffer.", buffer_size); 332 vm_direct_exit(0); 333 } 334 335 // buffer_bottom is the lowest address of the 2 core regions (rw, ro) when 336 // we are copying the class metadata into the buffer. 337 address buffer_bottom = (address)rs.base(); 338 log_info(cds)("Reserved output buffer space at " PTR_FORMAT " [" SIZE_FORMAT " bytes]", 339 p2i(buffer_bottom), buffer_size); 340 _shared_rs = rs; 341 342 _buffer_bottom = buffer_bottom; 343 _last_verified_top = buffer_bottom; 344 _current_dump_space = &_rw_region; 345 _num_dump_regions_used = 1; 346 _other_region_used_bytes = 0; 347 _current_dump_space->init(&_shared_rs, &_shared_vs); 348 349 ArchivePtrMarker::initialize(&_ptrmap, &_shared_vs); 350 351 // The bottom of the static archive should be mapped at this address by default. 352 _requested_static_archive_bottom = (address)MetaspaceShared::requested_base_address(); 353 354 // The bottom of the archive (that I am writing now) should be mapped at this address by default. 355 address my_archive_requested_bottom; 356 357 if (DumpSharedSpaces) { 358 my_archive_requested_bottom = _requested_static_archive_bottom; 359 } else { 360 _mapped_static_archive_bottom = (address)MetaspaceObj::shared_metaspace_base(); 361 _mapped_static_archive_top = (address)MetaspaceObj::shared_metaspace_top(); 362 assert(_mapped_static_archive_top >= _mapped_static_archive_bottom, "must be"); 363 size_t static_archive_size = _mapped_static_archive_top - _mapped_static_archive_bottom; 364 365 // At run time, we will mmap the dynamic archive at my_archive_requested_bottom 366 _requested_static_archive_top = _requested_static_archive_bottom + static_archive_size; 367 my_archive_requested_bottom = align_up(_requested_static_archive_top, MetaspaceShared::core_region_alignment()); 368 369 _requested_dynamic_archive_bottom = my_archive_requested_bottom; 370 } 371 372 _buffer_to_requested_delta = my_archive_requested_bottom - _buffer_bottom; 373 374 address my_archive_requested_top = my_archive_requested_bottom + buffer_size; 375 if (my_archive_requested_bottom < _requested_static_archive_bottom || 376 my_archive_requested_top <= _requested_static_archive_bottom) { 377 // Size overflow. 378 log_error(cds)("my_archive_requested_bottom = " INTPTR_FORMAT, p2i(my_archive_requested_bottom)); 379 log_error(cds)("my_archive_requested_top = " INTPTR_FORMAT, p2i(my_archive_requested_top)); 380 log_error(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is too high. " 381 "Please rerun java -Xshare:dump with a lower value", p2i(_requested_static_archive_bottom)); 382 vm_direct_exit(0); 383 } 384 385 if (DumpSharedSpaces) { 386 // We don't want any valid object to be at the very bottom of the archive. 387 // See ArchivePtrMarker::mark_pointer(). 388 rw_region()->allocate(16); 389 } 390 391 return buffer_bottom; 392 } 393 394 void ArchiveBuilder::iterate_sorted_roots(MetaspaceClosure* it, bool is_relocating_pointers) { 395 int i; 396 397 if (!is_relocating_pointers) { 398 // Don't relocate _symbol, so we can safely call decrement_refcount on the 399 // original symbols. 400 int num_symbols = _symbols->length(); 401 for (i = 0; i < num_symbols; i++) { 402 it->push(_symbols->adr_at(i)); 403 } 404 } 405 406 int num_klasses = _klasses->length(); 407 for (i = 0; i < num_klasses; i++) { 408 it->push(_klasses->adr_at(i)); 409 } 410 411 iterate_roots(it, is_relocating_pointers); 412 } 413 414 class GatherSortedSourceObjs : public MetaspaceClosure { 415 ArchiveBuilder* _builder; 416 417 public: 418 GatherSortedSourceObjs(ArchiveBuilder* builder) : _builder(builder) {} 419 420 virtual bool do_ref(Ref* ref, bool read_only) { 421 return _builder->gather_one_source_obj(enclosing_ref(), ref, read_only); 422 } 423 424 virtual void push_special(SpecialRef type, Ref* ref, intptr_t* p) { 425 assert(type == _method_entry_ref, "only special type allowed for now"); 426 address src_obj = ref->obj(); 427 size_t field_offset = pointer_delta(p, src_obj, sizeof(u1)); 428 _builder->add_special_ref(type, src_obj, field_offset); 429 }; 430 431 virtual void do_pending_ref(Ref* ref) { 432 if (ref->obj() != NULL) { 433 _builder->remember_embedded_pointer_in_copied_obj(enclosing_ref(), ref); 434 } 435 } 436 }; 437 438 bool ArchiveBuilder::gather_one_source_obj(MetaspaceClosure::Ref* enclosing_ref, 439 MetaspaceClosure::Ref* ref, bool read_only) { 440 address src_obj = ref->obj(); 441 if (src_obj == NULL) { 442 return false; 443 } 444 ref->set_keep_after_pushing(); 445 remember_embedded_pointer_in_copied_obj(enclosing_ref, ref); 446 447 FollowMode follow_mode = get_follow_mode(ref); 448 SourceObjInfo src_info(ref, read_only, follow_mode); 449 bool created; 450 SourceObjInfo* p = _src_obj_table.put_if_absent(src_obj, src_info, &created); 451 if (created) { 452 if (_src_obj_table.maybe_grow()) { 453 log_info(cds, hashtables)("Expanded _src_obj_table table to %d", _src_obj_table.table_size()); 454 } 455 } 456 457 assert(p->read_only() == src_info.read_only(), "must be"); 458 459 if (created && src_info.should_copy()) { 460 ref->set_user_data((void*)p); 461 if (read_only) { 462 _ro_src_objs.append(enclosing_ref, p); 463 } else { 464 _rw_src_objs.append(enclosing_ref, p); 465 } 466 return true; // Need to recurse into this ref only if we are copying it 467 } else { 468 return false; 469 } 470 } 471 472 void ArchiveBuilder::add_special_ref(MetaspaceClosure::SpecialRef type, address src_obj, size_t field_offset) { 473 _special_refs->append(SpecialRefInfo(type, src_obj, field_offset)); 474 } 475 476 void ArchiveBuilder::remember_embedded_pointer_in_copied_obj(MetaspaceClosure::Ref* enclosing_ref, 477 MetaspaceClosure::Ref* ref) { 478 assert(ref->obj() != NULL, "should have checked"); 479 480 if (enclosing_ref != NULL) { 481 SourceObjInfo* src_info = (SourceObjInfo*)enclosing_ref->user_data(); 482 if (src_info == NULL) { 483 // source objects of point_to_it/set_to_null types are not copied 484 // so we don't need to remember their pointers. 485 } else { 486 if (src_info->read_only()) { 487 _ro_src_objs.remember_embedded_pointer(src_info, ref); 488 } else { 489 _rw_src_objs.remember_embedded_pointer(src_info, ref); 490 } 491 } 492 } 493 } 494 495 void ArchiveBuilder::gather_source_objs() { 496 ResourceMark rm; 497 log_info(cds)("Gathering all archivable objects ... "); 498 gather_klasses_and_symbols(); 499 GatherSortedSourceObjs doit(this); 500 iterate_sorted_roots(&doit, /*is_relocating_pointers=*/false); 501 doit.finish(); 502 } 503 504 bool ArchiveBuilder::is_excluded(Klass* klass) { 505 if (klass->is_instance_klass()) { 506 InstanceKlass* ik = InstanceKlass::cast(klass); 507 return SystemDictionaryShared::is_excluded_class(ik); 508 } else if (klass->is_objArray_klass()) { 509 if (DynamicDumpSharedSpaces) { 510 // Don't support archiving of array klasses for now (WHY???) 511 return true; 512 } 513 Klass* bottom = ObjArrayKlass::cast(klass)->bottom_klass(); 514 if (bottom->is_instance_klass()) { 515 return SystemDictionaryShared::is_excluded_class(InstanceKlass::cast(bottom)); 516 } 517 } 518 519 return false; 520 } 521 522 ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref *ref) { 523 address obj = ref->obj(); 524 if (MetaspaceShared::is_in_shared_metaspace(obj)) { 525 // Don't dump existing shared metadata again. 526 return point_to_it; 527 } else if (ref->msotype() == MetaspaceObj::MethodDataType || 528 ref->msotype() == MetaspaceObj::MethodCountersType) { 529 return set_to_null; 530 } else { 531 if (ref->msotype() == MetaspaceObj::ClassType) { 532 Klass* klass = (Klass*)ref->obj(); 533 assert(klass->is_klass(), "must be"); 534 if (is_excluded(klass)) { 535 ResourceMark rm; 536 log_debug(cds, dynamic)("Skipping class (excluded): %s", klass->external_name()); 537 return set_to_null; 538 } 539 } 540 541 return make_a_copy; 542 } 543 } 544 545 void ArchiveBuilder::start_dump_space(DumpRegion* next) { 546 address bottom = _last_verified_top; 547 address top = (address)(current_dump_space()->top()); 548 _other_region_used_bytes += size_t(top - bottom); 549 550 current_dump_space()->pack(next); 551 _current_dump_space = next; 552 _num_dump_regions_used ++; 553 554 _last_verified_top = (address)(current_dump_space()->top()); 555 } 556 557 void ArchiveBuilder::verify_estimate_size(size_t estimate, const char* which) { 558 address bottom = _last_verified_top; 559 address top = (address)(current_dump_space()->top()); 560 size_t used = size_t(top - bottom) + _other_region_used_bytes; 561 int diff = int(estimate) - int(used); 562 563 log_info(cds)("%s estimate = " SIZE_FORMAT " used = " SIZE_FORMAT "; diff = %d bytes", which, estimate, used, diff); 564 assert(diff >= 0, "Estimate is too small"); 565 566 _last_verified_top = top; 567 _other_region_used_bytes = 0; 568 } 569 570 void ArchiveBuilder::dump_rw_metadata() { 571 ResourceMark rm; 572 log_info(cds)("Allocating RW objects ... "); 573 make_shallow_copies(&_rw_region, &_rw_src_objs); 574 575 #if INCLUDE_CDS_JAVA_HEAP 576 if (is_dumping_full_module_graph()) { 577 // Archive the ModuleEntry's and PackageEntry's of the 3 built-in loaders 578 char* start = rw_region()->top(); 579 ClassLoaderDataShared::allocate_archived_tables(); 580 alloc_stats()->record_modules(rw_region()->top() - start, /*read_only*/false); 581 } 582 #endif 583 } 584 585 void ArchiveBuilder::dump_ro_metadata() { 586 ResourceMark rm; 587 log_info(cds)("Allocating RO objects ... "); 588 589 start_dump_space(&_ro_region); 590 make_shallow_copies(&_ro_region, &_ro_src_objs); 591 592 #if INCLUDE_CDS_JAVA_HEAP 593 if (is_dumping_full_module_graph()) { 594 char* start = ro_region()->top(); 595 ClassLoaderDataShared::init_archived_tables(); 596 alloc_stats()->record_modules(ro_region()->top() - start, /*read_only*/true); 597 } 598 #endif 599 } 600 601 void ArchiveBuilder::make_shallow_copies(DumpRegion *dump_region, 602 const ArchiveBuilder::SourceObjList* src_objs) { 603 for (int i = 0; i < src_objs->objs()->length(); i++) { 604 make_shallow_copy(dump_region, src_objs->objs()->at(i)); 605 } 606 log_info(cds)("done (%d objects)", src_objs->objs()->length()); 607 } 608 609 void ArchiveBuilder::make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info) { 610 MetaspaceClosure::Ref* ref = src_info->ref(); 611 address src = ref->obj(); 612 int bytes = src_info->size_in_bytes(); 613 char* dest; 614 char* oldtop; 615 char* newtop; 616 617 oldtop = dump_region->top(); 618 if (ref->msotype() == MetaspaceObj::ClassType) { 619 // Save a pointer immediate in front of an InstanceKlass, so 620 // we can do a quick lookup from InstanceKlass* -> RunTimeClassInfo* 621 // without building another hashtable. See RunTimeClassInfo::get_for() 622 // in systemDictionaryShared.cpp. 623 Klass* klass = (Klass*)src; 624 if (klass->is_instance_klass()) { 625 SystemDictionaryShared::validate_before_archiving(InstanceKlass::cast(klass)); 626 dump_region->allocate(sizeof(address)); 627 } 628 } 629 dest = dump_region->allocate(bytes); 630 newtop = dump_region->top(); 631 632 memcpy(dest, src, bytes); 633 634 intptr_t* archived_vtable = CppVtables::get_archived_vtable(ref->msotype(), (address)dest); 635 if (archived_vtable != NULL) { 636 *(address*)dest = (address)archived_vtable; 637 ArchivePtrMarker::mark_pointer((address*)dest); 638 } 639 640 log_trace(cds)("Copy: " PTR_FORMAT " ==> " PTR_FORMAT " %d", p2i(src), p2i(dest), bytes); 641 src_info->set_dumped_addr((address)dest); 642 643 _alloc_stats.record(ref->msotype(), int(newtop - oldtop), src_info->read_only()); 644 } 645 646 address ArchiveBuilder::get_dumped_addr(address src_obj) const { 647 SourceObjInfo* p = _src_obj_table.get(src_obj); 648 assert(p != NULL, "must be"); 649 650 return p->dumped_addr(); 651 } 652 653 void ArchiveBuilder::relocate_embedded_pointers(ArchiveBuilder::SourceObjList* src_objs) { 654 for (int i = 0; i < src_objs->objs()->length(); i++) { 655 src_objs->relocate(i, this); 656 } 657 } 658 659 void ArchiveBuilder::update_special_refs() { 660 for (int i = 0; i < _special_refs->length(); i++) { 661 SpecialRefInfo s = _special_refs->at(i); 662 size_t field_offset = s.field_offset(); 663 address src_obj = s.src_obj(); 664 address dst_obj = get_dumped_addr(src_obj); 665 intptr_t* src_p = (intptr_t*)(src_obj + field_offset); 666 intptr_t* dst_p = (intptr_t*)(dst_obj + field_offset); 667 assert(s.type() == MetaspaceClosure::_method_entry_ref, "only special type allowed for now"); 668 669 assert(*src_p == *dst_p, "must be a copy"); 670 ArchivePtrMarker::mark_pointer((address*)dst_p); 671 } 672 } 673 674 class RefRelocator: public MetaspaceClosure { 675 ArchiveBuilder* _builder; 676 677 public: 678 RefRelocator(ArchiveBuilder* builder) : _builder(builder) {} 679 680 virtual bool do_ref(Ref* ref, bool read_only) { 681 if (ref->not_null()) { 682 ref->update(_builder->get_dumped_addr(ref->obj())); 683 ArchivePtrMarker::mark_pointer(ref->addr()); 684 } 685 return false; // Do not recurse. 686 } 687 }; 688 689 void ArchiveBuilder::relocate_roots() { 690 log_info(cds)("Relocating external roots ... "); 691 ResourceMark rm; 692 RefRelocator doit(this); 693 iterate_sorted_roots(&doit, /*is_relocating_pointers=*/true); 694 doit.finish(); 695 log_info(cds)("done"); 696 } 697 698 void ArchiveBuilder::relocate_metaspaceobj_embedded_pointers() { 699 log_info(cds)("Relocating embedded pointers in core regions ... "); 700 relocate_embedded_pointers(&_rw_src_objs); 701 relocate_embedded_pointers(&_ro_src_objs); 702 update_special_refs(); 703 } 704 705 // We must relocate vmClasses::_klasses[] only after we have copied the 706 // java objects in during dump_java_heap_objects(): during the object copy, we operate on 707 // old objects which assert that their klass is the original klass. 708 void ArchiveBuilder::relocate_vm_classes() { 709 log_info(cds)("Relocating vmClasses::_klasses[] ... "); 710 ResourceMark rm; 711 RefRelocator doit(this); 712 vmClasses::metaspace_pointers_do(&doit); 713 } 714 715 void ArchiveBuilder::make_klasses_shareable() { 716 int num_instance_klasses = 0; 717 int num_boot_klasses = 0; 718 int num_platform_klasses = 0; 719 int num_app_klasses = 0; 720 int num_hidden_klasses = 0; 721 int num_unlinked_klasses = 0; 722 int num_unregistered_klasses = 0; 723 int num_obj_array_klasses = 0; 724 int num_type_array_klasses = 0; 725 726 for (int i = 0; i < klasses()->length(); i++) { 727 const char* type; 728 const char* unlinked = ""; 729 const char* hidden = ""; 730 Klass* k = klasses()->at(i); 731 k->remove_java_mirror(); 732 if (k->is_objArray_klass()) { 733 // InstanceKlass and TypeArrayKlass will in turn call remove_unshareable_info 734 // on their array classes. 735 num_obj_array_klasses ++; 736 type = "array"; 737 } else if (k->is_typeArray_klass()) { 738 num_type_array_klasses ++; 739 type = "array"; 740 k->remove_unshareable_info(); 741 } else { 742 assert(k->is_instance_klass(), " must be"); 743 num_instance_klasses ++; 744 InstanceKlass* ik = InstanceKlass::cast(k); 745 if (DynamicDumpSharedSpaces) { 746 // For static dump, class loader type are already set. 747 ik->assign_class_loader_type(); 748 } 749 if (ik->is_shared_boot_class()) { 750 type = "boot"; 751 num_boot_klasses ++; 752 } else if (ik->is_shared_platform_class()) { 753 type = "plat"; 754 num_platform_klasses ++; 755 } else if (ik->is_shared_app_class()) { 756 type = "app"; 757 num_app_klasses ++; 758 } else { 759 assert(ik->is_shared_unregistered_class(), "must be"); 760 type = "unreg"; 761 num_unregistered_klasses ++; 762 } 763 764 if (!ik->is_linked()) { 765 num_unlinked_klasses ++; 766 unlinked = " ** unlinked"; 767 } 768 769 if (ik->is_hidden()) { 770 num_hidden_klasses ++; 771 hidden = " ** hidden"; 772 } 773 774 MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread::current(), ik); 775 ik->remove_unshareable_info(); 776 } 777 778 if (log_is_enabled(Debug, cds, class)) { 779 ResourceMark rm; 780 log_debug(cds, class)("klasses[%5d] = " PTR_FORMAT " %-5s %s%s%s", i, p2i(to_requested(k)), type, k->external_name(), hidden, unlinked); 781 } 782 } 783 784 log_info(cds)("Number of classes %d", num_instance_klasses + num_obj_array_klasses + num_type_array_klasses); 785 log_info(cds)(" instance classes = %5d", num_instance_klasses); 786 log_info(cds)(" boot = %5d", num_boot_klasses); 787 log_info(cds)(" app = %5d", num_app_klasses); 788 log_info(cds)(" platform = %5d", num_platform_klasses); 789 log_info(cds)(" unregistered = %5d", num_unregistered_klasses); 790 log_info(cds)(" (hidden) = %5d", num_hidden_klasses); 791 log_info(cds)(" (unlinked) = %5d", num_unlinked_klasses); 792 log_info(cds)(" obj array classes = %5d", num_obj_array_klasses); 793 log_info(cds)(" type array classes = %5d", num_type_array_klasses); 794 log_info(cds)(" symbols = %5d", _symbols->length()); 795 } 796 797 uintx ArchiveBuilder::buffer_to_offset(address p) const { 798 address requested_p = to_requested(p); 799 assert(requested_p >= _requested_static_archive_bottom, "must be"); 800 return requested_p - _requested_static_archive_bottom; 801 } 802 803 uintx ArchiveBuilder::any_to_offset(address p) const { 804 if (is_in_mapped_static_archive(p)) { 805 assert(DynamicDumpSharedSpaces, "must be"); 806 return p - _mapped_static_archive_bottom; 807 } 808 return buffer_to_offset(p); 809 } 810 811 // Update a Java object to point its Klass* to the new location after 812 // shared archive has been compacted. 813 void ArchiveBuilder::relocate_klass_ptr(oop o) { 814 assert(DumpSharedSpaces, "sanity"); 815 Klass* k = get_relocated_klass(o->klass()); 816 Klass* requested_k = to_requested(k); 817 narrowKlass nk = CompressedKlassPointers::encode_not_null(requested_k, _requested_static_archive_bottom); 818 o->set_narrow_klass(nk); 819 } 820 821 // RelocateBufferToRequested --- Relocate all the pointers in rw/ro, 822 // so that the archive can be mapped to the "requested" location without runtime relocation. 823 // 824 // - See ArchiveBuilder header for the definition of "buffer", "mapped" and "requested" 825 // - ArchivePtrMarker::ptrmap() marks all the pointers in the rw/ro regions 826 // - Every pointer must have one of the following values: 827 // [a] NULL: 828 // No relocation is needed. Remove this pointer from ptrmap so we don't need to 829 // consider it at runtime. 830 // [b] Points into an object X which is inside the buffer: 831 // Adjust this pointer by _buffer_to_requested_delta, so it points to X 832 // when the archive is mapped at the requested location. 833 // [c] Points into an object Y which is inside mapped static archive: 834 // - This happens only during dynamic dump 835 // - Adjust this pointer by _mapped_to_requested_static_archive_delta, 836 // so it points to Y when the static archive is mapped at the requested location. 837 template <bool STATIC_DUMP> 838 class RelocateBufferToRequested : public BitMapClosure { 839 ArchiveBuilder* _builder; 840 address _buffer_bottom; 841 intx _buffer_to_requested_delta; 842 intx _mapped_to_requested_static_archive_delta; 843 size_t _max_non_null_offset; 844 845 public: 846 RelocateBufferToRequested(ArchiveBuilder* builder) { 847 _builder = builder; 848 _buffer_bottom = _builder->buffer_bottom(); 849 _buffer_to_requested_delta = builder->buffer_to_requested_delta(); 850 _mapped_to_requested_static_archive_delta = builder->requested_static_archive_bottom() - builder->mapped_static_archive_bottom(); 851 _max_non_null_offset = 0; 852 853 address bottom = _builder->buffer_bottom(); 854 address top = _builder->buffer_top(); 855 address new_bottom = bottom + _buffer_to_requested_delta; 856 address new_top = top + _buffer_to_requested_delta; 857 log_debug(cds)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT "] to " 858 "[" INTPTR_FORMAT " - " INTPTR_FORMAT "]", 859 p2i(bottom), p2i(top), 860 p2i(new_bottom), p2i(new_top)); 861 } 862 863 bool do_bit(size_t offset) { 864 address* p = (address*)_buffer_bottom + offset; 865 assert(_builder->is_in_buffer_space(p), "pointer must live in buffer space"); 866 867 if (*p == NULL) { 868 // todo -- clear bit, etc 869 ArchivePtrMarker::ptrmap()->clear_bit(offset); 870 } else { 871 if (STATIC_DUMP) { 872 assert(_builder->is_in_buffer_space(*p), "old pointer must point inside buffer space"); 873 *p += _buffer_to_requested_delta; 874 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive"); 875 } else { 876 if (_builder->is_in_buffer_space(*p)) { 877 *p += _buffer_to_requested_delta; 878 // assert is in requested dynamic archive 879 } else { 880 assert(_builder->is_in_mapped_static_archive(*p), "old pointer must point inside buffer space or mapped static archive"); 881 *p += _mapped_to_requested_static_archive_delta; 882 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive"); 883 } 884 } 885 _max_non_null_offset = offset; 886 } 887 888 return true; // keep iterating 889 } 890 891 void doit() { 892 ArchivePtrMarker::ptrmap()->iterate(this); 893 ArchivePtrMarker::compact(_max_non_null_offset); 894 } 895 }; 896 897 898 void ArchiveBuilder::relocate_to_requested() { 899 ro_region()->pack(); 900 901 size_t my_archive_size = buffer_top() - buffer_bottom(); 902 903 if (DumpSharedSpaces) { 904 _requested_static_archive_top = _requested_static_archive_bottom + my_archive_size; 905 RelocateBufferToRequested<true> patcher(this); 906 patcher.doit(); 907 } else { 908 assert(DynamicDumpSharedSpaces, "must be"); 909 _requested_dynamic_archive_top = _requested_dynamic_archive_bottom + my_archive_size; 910 RelocateBufferToRequested<false> patcher(this); 911 patcher.doit(); 912 } 913 } 914 915 // Write detailed info to a mapfile to analyze contents of the archive. 916 // static dump: 917 // java -Xshare:dump -Xlog:cds+map=trace:file=cds.map:none:filesize=0 918 // dynamic dump: 919 // java -cp MyApp.jar -XX:ArchiveClassesAtExit=MyApp.jsa \ 920 // -Xlog:cds+map=trace:file=cds.map:none:filesize=0 MyApp 921 // 922 // We need to do some address translation because the buffers used at dump time may be mapped to 923 // a different location at runtime. At dump time, the buffers may be at arbitrary locations 924 // picked by the OS. At runtime, we try to map at a fixed location (SharedBaseAddress). For 925 // consistency, we log everything using runtime addresses. 926 class ArchiveBuilder::CDSMapLogger : AllStatic { 927 static intx buffer_to_runtime_delta() { 928 // Translate the buffers used by the RW/RO regions to their eventual (requested) locations 929 // at runtime. 930 return ArchiveBuilder::current()->buffer_to_requested_delta(); 931 } 932 933 // rw/ro regions only 934 static void log_metaspace_region(const char* name, DumpRegion* region, 935 const ArchiveBuilder::SourceObjList* src_objs) { 936 address region_base = address(region->base()); 937 address region_top = address(region->top()); 938 log_region(name, region_base, region_top, region_base + buffer_to_runtime_delta()); 939 log_metaspace_objects(region, src_objs); 940 } 941 942 #define _LOG_PREFIX PTR_FORMAT ": @@ %-17s %d" 943 944 static void log_klass(Klass* k, address runtime_dest, const char* type_name, int bytes, Thread* current) { 945 ResourceMark rm(current); 946 log_debug(cds, map)(_LOG_PREFIX " %s", 947 p2i(runtime_dest), type_name, bytes, k->external_name()); 948 } 949 static void log_method(Method* m, address runtime_dest, const char* type_name, int bytes, Thread* current) { 950 ResourceMark rm(current); 951 log_debug(cds, map)(_LOG_PREFIX " %s", 952 p2i(runtime_dest), type_name, bytes, m->external_name()); 953 } 954 955 // rw/ro regions only 956 static void log_metaspace_objects(DumpRegion* region, const ArchiveBuilder::SourceObjList* src_objs) { 957 address last_obj_base = address(region->base()); 958 address last_obj_end = address(region->base()); 959 address region_end = address(region->end()); 960 Thread* current = Thread::current(); 961 for (int i = 0; i < src_objs->objs()->length(); i++) { 962 SourceObjInfo* src_info = src_objs->at(i); 963 address src = src_info->orig_obj(); 964 address dest = src_info->dumped_addr(); 965 log_data(last_obj_base, dest, last_obj_base + buffer_to_runtime_delta()); 966 address runtime_dest = dest + buffer_to_runtime_delta(); 967 int bytes = src_info->size_in_bytes(); 968 969 MetaspaceObj::Type type = src_info->msotype(); 970 const char* type_name = MetaspaceObj::type_name(type); 971 972 switch (type) { 973 case MetaspaceObj::ClassType: 974 log_klass((Klass*)src, runtime_dest, type_name, bytes, current); 975 break; 976 case MetaspaceObj::ConstantPoolType: 977 log_klass(((ConstantPool*)src)->pool_holder(), 978 runtime_dest, type_name, bytes, current); 979 break; 980 case MetaspaceObj::ConstantPoolCacheType: 981 log_klass(((ConstantPoolCache*)src)->constant_pool()->pool_holder(), 982 runtime_dest, type_name, bytes, current); 983 break; 984 case MetaspaceObj::MethodType: 985 log_method((Method*)src, runtime_dest, type_name, bytes, current); 986 break; 987 case MetaspaceObj::ConstMethodType: 988 log_method(((ConstMethod*)src)->method(), runtime_dest, type_name, bytes, current); 989 break; 990 case MetaspaceObj::SymbolType: 991 { 992 ResourceMark rm(current); 993 Symbol* s = (Symbol*)src; 994 log_debug(cds, map)(_LOG_PREFIX " %s", p2i(runtime_dest), type_name, bytes, 995 s->as_quoted_ascii()); 996 } 997 break; 998 default: 999 log_debug(cds, map)(_LOG_PREFIX, p2i(runtime_dest), type_name, bytes); 1000 break; 1001 } 1002 1003 last_obj_base = dest; 1004 last_obj_end = dest + bytes; 1005 } 1006 1007 log_data(last_obj_base, last_obj_end, last_obj_base + buffer_to_runtime_delta()); 1008 if (last_obj_end < region_end) { 1009 log_debug(cds, map)(PTR_FORMAT ": @@ Misc data " SIZE_FORMAT " bytes", 1010 p2i(last_obj_end + buffer_to_runtime_delta()), 1011 size_t(region_end - last_obj_end)); 1012 log_data(last_obj_end, region_end, last_obj_end + buffer_to_runtime_delta()); 1013 } 1014 } 1015 1016 #undef _LOG_PREFIX 1017 1018 // Log information about a region, whose address at dump time is [base .. top). At 1019 // runtime, this region will be mapped to runtime_base. runtime_base is 0 if this 1020 // region will be mapped at os-selected addresses (such as the bitmap region), or will 1021 // be accessed with os::read (the header). 1022 static void log_region(const char* name, address base, address top, address runtime_base) { 1023 size_t size = top - base; 1024 base = runtime_base; 1025 top = runtime_base + size; 1026 log_info(cds, map)("[%-18s " PTR_FORMAT " - " PTR_FORMAT " " SIZE_FORMAT_W(9) " bytes]", 1027 name, p2i(base), p2i(top), size); 1028 } 1029 1030 // open and closed archive regions 1031 static void log_heap_regions(const char* which, GrowableArray<MemRegion> *regions) { 1032 #if INCLUDE_CDS_JAVA_HEAP 1033 for (int i = 0; i < regions->length(); i++) { 1034 address start = address(regions->at(i).start()); 1035 address end = address(regions->at(i).end()); 1036 log_region(which, start, end, start); 1037 1038 while (start < end) { 1039 size_t byte_size; 1040 oop archived_oop = cast_to_oop(start); 1041 oop original_oop = HeapShared::get_original_object(archived_oop); 1042 if (original_oop != NULL) { 1043 ResourceMark rm; 1044 log_info(cds, map)(PTR_FORMAT ": @@ Object %s", 1045 p2i(start), original_oop->klass()->external_name()); 1046 byte_size = original_oop->size() * BytesPerWord; 1047 } else if (archived_oop == HeapShared::roots()) { 1048 // HeapShared::roots() is copied specially so it doesn't exist in 1049 // HeapShared::OriginalObjectTable. See HeapShared::copy_roots(). 1050 log_info(cds, map)(PTR_FORMAT ": @@ Object HeapShared:roots (ObjArray)", 1051 p2i(start)); 1052 byte_size = objArrayOopDesc::object_size(HeapShared::roots()->length()) * BytesPerWord; 1053 } else { 1054 // We have reached the end of the region 1055 break; 1056 } 1057 address oop_end = start + byte_size; 1058 log_data(start, oop_end, start, /*is_heap=*/true); 1059 start = oop_end; 1060 } 1061 if (start < end) { 1062 log_info(cds, map)(PTR_FORMAT ": @@ Unused heap space " SIZE_FORMAT " bytes", 1063 p2i(start), size_t(end - start)); 1064 log_data(start, end, start, /*is_heap=*/true); 1065 } 1066 } 1067 #endif 1068 } 1069 1070 // Log all the data [base...top). Pretend that the base address 1071 // will be mapped to runtime_base at run-time. 1072 static void log_data(address base, address top, address runtime_base, bool is_heap = false) { 1073 assert(top >= base, "must be"); 1074 1075 LogStreamHandle(Trace, cds, map) lsh; 1076 if (lsh.is_enabled()) { 1077 int unitsize = sizeof(address); 1078 if (is_heap && UseCompressedOops) { 1079 // This makes the compressed oop pointers easier to read, but 1080 // longs and doubles will be split into two words. 1081 unitsize = sizeof(narrowOop); 1082 } 1083 os::print_hex_dump(&lsh, base, top, unitsize, 32, runtime_base); 1084 } 1085 } 1086 1087 static void log_header(FileMapInfo* mapinfo) { 1088 LogStreamHandle(Info, cds, map) lsh; 1089 if (lsh.is_enabled()) { 1090 mapinfo->print(&lsh); 1091 } 1092 } 1093 1094 public: 1095 static void log(ArchiveBuilder* builder, FileMapInfo* mapinfo, 1096 GrowableArray<MemRegion> *closed_heap_regions, 1097 GrowableArray<MemRegion> *open_heap_regions, 1098 char* bitmap, size_t bitmap_size_in_bytes) { 1099 log_info(cds, map)("%s CDS archive map for %s", DumpSharedSpaces ? "Static" : "Dynamic", mapinfo->full_path()); 1100 1101 address header = address(mapinfo->header()); 1102 address header_end = header + mapinfo->header()->header_size(); 1103 log_region("header", header, header_end, 0); 1104 log_header(mapinfo); 1105 log_data(header, header_end, 0); 1106 1107 DumpRegion* rw_region = &builder->_rw_region; 1108 DumpRegion* ro_region = &builder->_ro_region; 1109 1110 log_metaspace_region("rw region", rw_region, &builder->_rw_src_objs); 1111 log_metaspace_region("ro region", ro_region, &builder->_ro_src_objs); 1112 1113 address bitmap_end = address(bitmap + bitmap_size_in_bytes); 1114 log_region("bitmap", address(bitmap), bitmap_end, 0); 1115 log_data((address)bitmap, bitmap_end, 0); 1116 1117 if (closed_heap_regions != NULL) { 1118 log_heap_regions("closed heap region", closed_heap_regions); 1119 } 1120 if (open_heap_regions != NULL) { 1121 log_heap_regions("open heap region", open_heap_regions); 1122 } 1123 1124 log_info(cds, map)("[End of CDS archive map]"); 1125 } 1126 }; // end ArchiveBuilder::CDSMapLogger 1127 1128 void ArchiveBuilder::print_stats() { 1129 _alloc_stats.print_stats(int(_ro_region.used()), int(_rw_region.used())); 1130 } 1131 1132 void ArchiveBuilder::clean_up_src_obj_table() { 1133 SrcObjTableCleaner cleaner; 1134 _src_obj_table.iterate(&cleaner); 1135 } 1136 1137 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo, 1138 GrowableArray<MemRegion>* closed_heap_regions, 1139 GrowableArray<MemRegion>* open_heap_regions, 1140 GrowableArray<ArchiveHeapOopmapInfo>* closed_heap_oopmaps, 1141 GrowableArray<ArchiveHeapOopmapInfo>* open_heap_oopmaps) { 1142 // Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with 1143 // MetaspaceShared::n_regions (internal to hotspot). 1144 assert(NUM_CDS_REGIONS == MetaspaceShared::n_regions, "sanity"); 1145 1146 write_region(mapinfo, MetaspaceShared::rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false); 1147 write_region(mapinfo, MetaspaceShared::ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false); 1148 1149 size_t bitmap_size_in_bytes; 1150 char* bitmap = mapinfo->write_bitmap_region(ArchivePtrMarker::ptrmap(), closed_heap_oopmaps, open_heap_oopmaps, 1151 bitmap_size_in_bytes); 1152 1153 if (closed_heap_regions != NULL) { 1154 _total_closed_heap_region_size = mapinfo->write_heap_regions( 1155 closed_heap_regions, 1156 closed_heap_oopmaps, 1157 MetaspaceShared::first_closed_heap_region, 1158 MetaspaceShared::max_num_closed_heap_regions); 1159 _total_open_heap_region_size = mapinfo->write_heap_regions( 1160 open_heap_regions, 1161 open_heap_oopmaps, 1162 MetaspaceShared::first_open_heap_region, 1163 MetaspaceShared::max_num_open_heap_regions); 1164 } 1165 1166 print_region_stats(mapinfo, closed_heap_regions, open_heap_regions); 1167 1168 mapinfo->set_requested_base((char*)MetaspaceShared::requested_base_address()); 1169 mapinfo->set_header_crc(mapinfo->compute_header_crc()); 1170 // After this point, we should not write any data into mapinfo->header() since this 1171 // would corrupt its checksum we have calculated before. 1172 mapinfo->write_header(); 1173 mapinfo->close(); 1174 1175 if (log_is_enabled(Info, cds)) { 1176 print_stats(); 1177 } 1178 1179 if (log_is_enabled(Info, cds, map)) { 1180 CDSMapLogger::log(this, mapinfo, closed_heap_regions, open_heap_regions, 1181 bitmap, bitmap_size_in_bytes); 1182 } 1183 CDS_JAVA_HEAP_ONLY(HeapShared::destroy_archived_object_cache()); 1184 FREE_C_HEAP_ARRAY(char, bitmap); 1185 } 1186 1187 void ArchiveBuilder::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) { 1188 mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec); 1189 } 1190 1191 void ArchiveBuilder::print_region_stats(FileMapInfo *mapinfo, 1192 GrowableArray<MemRegion>* closed_heap_regions, 1193 GrowableArray<MemRegion>* open_heap_regions) { 1194 // Print statistics of all the regions 1195 const size_t bitmap_used = mapinfo->space_at(MetaspaceShared::bm)->used(); 1196 const size_t bitmap_reserved = mapinfo->space_at(MetaspaceShared::bm)->used_aligned(); 1197 const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() + 1198 bitmap_reserved + 1199 _total_closed_heap_region_size + 1200 _total_open_heap_region_size; 1201 const size_t total_bytes = _ro_region.used() + _rw_region.used() + 1202 bitmap_used + 1203 _total_closed_heap_region_size + 1204 _total_open_heap_region_size; 1205 const double total_u_perc = percent_of(total_bytes, total_reserved); 1206 1207 _rw_region.print(total_reserved); 1208 _ro_region.print(total_reserved); 1209 1210 print_bitmap_region_stats(bitmap_used, total_reserved); 1211 1212 if (closed_heap_regions != NULL) { 1213 print_heap_region_stats(closed_heap_regions, "ca", total_reserved); 1214 print_heap_region_stats(open_heap_regions, "oa", total_reserved); 1215 } 1216 1217 log_debug(cds)("total : " SIZE_FORMAT_W(9) " [100.0%% of total] out of " SIZE_FORMAT_W(9) " bytes [%5.1f%% used]", 1218 total_bytes, total_reserved, total_u_perc); 1219 } 1220 1221 void ArchiveBuilder::print_bitmap_region_stats(size_t size, size_t total_size) { 1222 log_debug(cds)("bm space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used]", 1223 size, size/double(total_size)*100.0, size); 1224 } 1225 1226 void ArchiveBuilder::print_heap_region_stats(GrowableArray<MemRegion>* regions, 1227 const char *name, size_t total_size) { 1228 int arr_len = regions == NULL ? 0 : regions->length(); 1229 for (int i = 0; i < arr_len; i++) { 1230 char* start = (char*)regions->at(i).start(); 1231 size_t size = regions->at(i).byte_size(); 1232 char* top = start + size; 1233 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, 1234 name, i, size, size/double(total_size)*100.0, size, p2i(start)); 1235 } 1236 } 1237 1238 void ArchiveBuilder::report_out_of_space(const char* name, size_t needed_bytes) { 1239 // This is highly unlikely to happen on 64-bits because we have reserved a 4GB space. 1240 // On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes 1241 // or so. 1242 _rw_region.print_out_of_space_msg(name, needed_bytes); 1243 _ro_region.print_out_of_space_msg(name, needed_bytes); 1244 1245 vm_exit_during_initialization(err_msg("Unable to allocate from '%s' region", name), 1246 "Please reduce the number of shared classes."); 1247 } 1248 1249 1250 #ifndef PRODUCT 1251 void ArchiveBuilder::assert_is_vm_thread() { 1252 assert(Thread::current()->is_VM_thread(), "ArchiveBuilder should be used only inside the VMThread"); 1253 } 1254 #endif