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/compressedKlass.inline.hpp" 43 #include "oops/instanceKlass.hpp" 44 #include "oops/klass.inline.hpp" 45 #include "oops/objArrayKlass.hpp" 46 #include "oops/objArrayOop.inline.hpp" 47 #include "oops/oopHandle.inline.hpp" 48 #include "runtime/arguments.hpp" 49 #include "runtime/globals_extension.hpp" 50 #include "runtime/sharedRuntime.hpp" 51 #include "runtime/thread.hpp" 52 #include "utilities/align.hpp" 53 #include "utilities/bitMap.inline.hpp" 54 #include "utilities/formatBuffer.hpp" 55 #include "utilities/hashtable.inline.hpp" 56 57 ArchiveBuilder* ArchiveBuilder::_current = NULL; 58 59 ArchiveBuilder::OtherROAllocMark::~OtherROAllocMark() { 60 char* newtop = ArchiveBuilder::current()->_ro_region.top(); 61 ArchiveBuilder::alloc_stats()->record_other_type(int(newtop - _oldtop), true); 62 } 63 64 ArchiveBuilder::SourceObjList::SourceObjList() : _ptrmap(16 * K) { 65 _total_bytes = 0; 66 _objs = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<SourceObjInfo*>(128 * K, mtClassShared); 67 } 68 69 ArchiveBuilder::SourceObjList::~SourceObjList() { 70 delete _objs; 71 } 72 73 void ArchiveBuilder::SourceObjList::append(MetaspaceClosure::Ref* enclosing_ref, SourceObjInfo* src_info) { 74 // Save this source object for copying 75 _objs->append(src_info); 76 77 // Prepare for marking the pointers in this source object 78 assert(is_aligned(_total_bytes, sizeof(address)), "must be"); 79 src_info->set_ptrmap_start(_total_bytes / sizeof(address)); 80 _total_bytes = align_up(_total_bytes + (uintx)src_info->size_in_bytes(), sizeof(address)); 81 src_info->set_ptrmap_end(_total_bytes / sizeof(address)); 82 83 BitMap::idx_t bitmap_size_needed = BitMap::idx_t(src_info->ptrmap_end()); 84 if (_ptrmap.size() <= bitmap_size_needed) { 85 _ptrmap.resize((bitmap_size_needed + 1) * 2); 86 } 87 } 88 89 void ArchiveBuilder::SourceObjList::remember_embedded_pointer(SourceObjInfo* src_info, MetaspaceClosure::Ref* ref) { 90 // src_obj contains a pointer. Remember the location of this pointer in _ptrmap, 91 // so that we can copy/relocate it later. E.g., if we have 92 // class Foo { intx scala; Bar* ptr; } 93 // Foo *f = 0x100; 94 // To mark the f->ptr pointer on 64-bit platform, this function is called with 95 // src_info()->obj() == 0x100 96 // ref->addr() == 0x108 97 address src_obj = src_info->obj(); 98 address* field_addr = ref->addr(); 99 assert(src_info->ptrmap_start() < _total_bytes, "sanity"); 100 assert(src_info->ptrmap_end() <= _total_bytes, "sanity"); 101 assert(*field_addr != NULL, "should have checked"); 102 103 intx field_offset_in_bytes = ((address)field_addr) - src_obj; 104 DEBUG_ONLY(int src_obj_size = src_info->size_in_bytes();) 105 assert(field_offset_in_bytes >= 0, "must be"); 106 assert(field_offset_in_bytes + intx(sizeof(intptr_t)) <= intx(src_obj_size), "must be"); 107 assert(is_aligned(field_offset_in_bytes, sizeof(address)), "must be"); 108 109 BitMap::idx_t idx = BitMap::idx_t(src_info->ptrmap_start() + (uintx)(field_offset_in_bytes / sizeof(address))); 110 _ptrmap.set_bit(BitMap::idx_t(idx)); 111 } 112 113 class RelocateEmbeddedPointers : public BitMapClosure { 114 ArchiveBuilder* _builder; 115 address _dumped_obj; 116 BitMap::idx_t _start_idx; 117 public: 118 RelocateEmbeddedPointers(ArchiveBuilder* builder, address dumped_obj, BitMap::idx_t start_idx) : 119 _builder(builder), _dumped_obj(dumped_obj), _start_idx(start_idx) {} 120 121 bool do_bit(BitMap::idx_t bit_offset) { 122 size_t field_offset = size_t(bit_offset - _start_idx) * sizeof(address); 123 address* ptr_loc = (address*)(_dumped_obj + field_offset); 124 125 address old_p = *ptr_loc; 126 address new_p = _builder->get_dumped_addr(old_p); 127 128 log_trace(cds)("Ref: [" PTR_FORMAT "] -> " PTR_FORMAT " => " PTR_FORMAT, 129 p2i(ptr_loc), p2i(old_p), p2i(new_p)); 130 131 ArchivePtrMarker::set_and_mark_pointer(ptr_loc, new_p); 132 return true; // keep iterating the bitmap 133 } 134 }; 135 136 void ArchiveBuilder::SourceObjList::relocate(int i, ArchiveBuilder* builder) { 137 SourceObjInfo* src_info = objs()->at(i); 138 assert(src_info->should_copy(), "must be"); 139 BitMap::idx_t start = BitMap::idx_t(src_info->ptrmap_start()); // inclusive 140 BitMap::idx_t end = BitMap::idx_t(src_info->ptrmap_end()); // exclusive 141 142 RelocateEmbeddedPointers relocator(builder, src_info->dumped_addr(), start); 143 _ptrmap.iterate(&relocator, start, end); 144 } 145 146 ArchiveBuilder::ArchiveBuilder() : 147 _current_dump_space(NULL), 148 _buffer_bottom(NULL), 149 _last_verified_top(NULL), 150 _num_dump_regions_used(0), 151 _other_region_used_bytes(0), 152 _requested_static_archive_bottom(NULL), 153 _requested_static_archive_top(NULL), 154 _requested_dynamic_archive_bottom(NULL), 155 _requested_dynamic_archive_top(NULL), 156 _mapped_static_archive_bottom(NULL), 157 _mapped_static_archive_top(NULL), 158 _buffer_to_requested_delta(0), 159 _rw_region("rw", MAX_SHARED_DELTA), 160 _ro_region("ro", MAX_SHARED_DELTA), 161 _rw_src_objs(), 162 _ro_src_objs(), 163 _src_obj_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 (ResourceObj::C_HEAP, mtClassShared) GrowableArray<Klass*>(4 * K, mtClassShared); 170 _symbols = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<Symbol*>(256 * K, mtClassShared); 171 _special_refs = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<SpecialRefInfo>(24 * K, mtClassShared); 172 173 assert(_current == NULL, "must be"); 174 _current = this; 175 } 176 177 ArchiveBuilder::~ArchiveBuilder() { 178 assert(_current == this, "must be"); 179 _current = NULL; 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() == NULL) { 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 ArchiveBuilder::make_shallow_copies: make sure we have enough space for both maximum 224 // Klass alignment as well as the RuntimeInfo* pointer we will embed in front of a Klass. 225 _estimated_metaspaceobj_bytes += align_up(BytesPerWord, KlassAlignmentInBytes) + 226 align_up(sizeof(void*), SharedSpaceObjectAlignment); 227 } else if (ref->msotype() == MetaspaceObj::SymbolType) { 228 // Make sure the symbol won't be GC'ed while we are dumping the archive. 229 Symbol* sym = (Symbol*)ref->obj(); 230 sym->increment_refcount(); 231 _symbols->append(sym); 232 } 233 234 int bytes = ref->size() * BytesPerWord; 235 _estimated_metaspaceobj_bytes += align_up(bytes, SharedSpaceObjectAlignment); 236 237 return true; // recurse 238 } 239 240 void ArchiveBuilder::gather_klasses_and_symbols() { 241 ResourceMark rm; 242 log_info(cds)("Gathering classes and symbols ... "); 243 GatherKlassesAndSymbols doit(this); 244 iterate_roots(&doit, /*is_relocating_pointers=*/false); 245 #if INCLUDE_CDS_JAVA_HEAP 246 if (is_dumping_full_module_graph()) { 247 ClassLoaderDataShared::iterate_symbols(&doit); 248 } 249 #endif 250 doit.finish(); 251 252 if (DumpSharedSpaces) { 253 // To ensure deterministic contents in the static archive, we need to ensure that 254 // we iterate the MetaspaceObjs in a deterministic order. It doesn't matter where 255 // the MetaspaceObjs are located originally, as they are copied sequentially into 256 // the archive during the iteration. 257 // 258 // The only issue here is that the symbol table and the system directories may be 259 // randomly ordered, so we copy the symbols and klasses into two arrays and sort 260 // them deterministically. 261 // 262 // During -Xshare:dump, the order of Symbol creation is strictly determined by 263 // the SharedClassListFile (class loading is done in a single thread and the JIT 264 // is disabled). Also, Symbols are allocated in monotonically increasing addresses 265 // (see Symbol::operator new(size_t, int)). So if we iterate the Symbols by 266 // ascending address order, we ensure that all Symbols are copied into deterministic 267 // locations in the archive. 268 // 269 // TODO: in the future, if we want to produce deterministic contents in the 270 // dynamic archive, we might need to sort the symbols alphabetically (also see 271 // DynamicArchiveBuilder::sort_methods()). 272 sort_symbols_and_fix_hash(); 273 sort_klasses(); 274 275 // TODO -- we need a proper estimate for the archived modules, etc, 276 // but this should be enough for now 277 _estimated_metaspaceobj_bytes += 200 * 1024 * 1024; 278 } 279 } 280 281 int ArchiveBuilder::compare_symbols_by_address(Symbol** a, Symbol** b) { 282 if (a[0] < b[0]) { 283 return -1; 284 } else { 285 assert(a[0] > b[0], "Duplicated symbol %s unexpected", (*a)->as_C_string()); 286 return 1; 287 } 288 } 289 290 void ArchiveBuilder::sort_symbols_and_fix_hash() { 291 log_info(cds)("Sorting symbols and fixing identity hash ... "); 292 os::init_random(0x12345678); 293 _symbols->sort(compare_symbols_by_address); 294 for (int i = 0; i < _symbols->length(); i++) { 295 assert(_symbols->at(i)->is_permanent(), "archived symbols must be permanent"); 296 _symbols->at(i)->update_identity_hash(); 297 } 298 } 299 300 int ArchiveBuilder::compare_klass_by_name(Klass** a, Klass** b) { 301 return a[0]->name()->fast_compare(b[0]->name()); 302 } 303 304 void ArchiveBuilder::sort_klasses() { 305 log_info(cds)("Sorting classes ... "); 306 _klasses->sort(compare_klass_by_name); 307 } 308 309 size_t ArchiveBuilder::estimate_archive_size() { 310 // size of the symbol table and two dictionaries, plus the RunTimeClassInfo's 311 size_t symbol_table_est = SymbolTable::estimate_size_for_archive(); 312 size_t dictionary_est = SystemDictionaryShared::estimate_size_for_archive(); 313 _estimated_hashtable_bytes = symbol_table_est + dictionary_est; 314 315 size_t total = 0; 316 317 total += _estimated_metaspaceobj_bytes; 318 total += _estimated_hashtable_bytes; 319 320 // allow fragmentation at the end of each dump region 321 total += _total_dump_regions * MetaspaceShared::core_region_alignment(); 322 323 log_info(cds)("_estimated_hashtable_bytes = " SIZE_FORMAT " + " SIZE_FORMAT " = " SIZE_FORMAT, 324 symbol_table_est, dictionary_est, _estimated_hashtable_bytes); 325 log_info(cds)("_estimated_metaspaceobj_bytes = " SIZE_FORMAT, _estimated_metaspaceobj_bytes); 326 log_info(cds)("total estimate bytes = " SIZE_FORMAT, total); 327 328 return align_up(total, MetaspaceShared::core_region_alignment()); 329 } 330 331 address ArchiveBuilder::reserve_buffer() { 332 size_t buffer_size = estimate_archive_size(); 333 ReservedSpace rs(buffer_size, MetaspaceShared::core_region_alignment(), os::vm_page_size()); 334 if (!rs.is_reserved()) { 335 log_error(cds)("Failed to reserve " SIZE_FORMAT " bytes of output buffer.", buffer_size); 336 vm_direct_exit(0); 337 } 338 339 // buffer_bottom is the lowest address of the 2 core regions (rw, ro) when 340 // we are copying the class metadata into the buffer. 341 address buffer_bottom = (address)rs.base(); 342 log_info(cds)("Reserved output buffer space at " PTR_FORMAT " [" SIZE_FORMAT " bytes]", 343 p2i(buffer_bottom), buffer_size); 344 _shared_rs = rs; 345 346 _buffer_bottom = buffer_bottom; 347 _last_verified_top = buffer_bottom; 348 _current_dump_space = &_rw_region; 349 _num_dump_regions_used = 1; 350 _other_region_used_bytes = 0; 351 _current_dump_space->init(&_shared_rs, &_shared_vs); 352 353 ArchivePtrMarker::initialize(&_ptrmap, &_shared_vs); 354 355 // The bottom of the static archive should be mapped at this address by default. 356 _requested_static_archive_bottom = (address)MetaspaceShared::requested_base_address(); 357 358 // The bottom of the archive (that I am writing now) should be mapped at this address by default. 359 address my_archive_requested_bottom; 360 361 if (DumpSharedSpaces) { 362 my_archive_requested_bottom = _requested_static_archive_bottom; 363 } else { 364 _mapped_static_archive_bottom = (address)MetaspaceObj::shared_metaspace_base(); 365 _mapped_static_archive_top = (address)MetaspaceObj::shared_metaspace_top(); 366 assert(_mapped_static_archive_top >= _mapped_static_archive_bottom, "must be"); 367 size_t static_archive_size = _mapped_static_archive_top - _mapped_static_archive_bottom; 368 369 // At run time, we will mmap the dynamic archive at my_archive_requested_bottom 370 _requested_static_archive_top = _requested_static_archive_bottom + static_archive_size; 371 my_archive_requested_bottom = align_up(_requested_static_archive_top, MetaspaceShared::core_region_alignment()); 372 373 _requested_dynamic_archive_bottom = my_archive_requested_bottom; 374 } 375 376 _buffer_to_requested_delta = my_archive_requested_bottom - _buffer_bottom; 377 378 address my_archive_requested_top = my_archive_requested_bottom + buffer_size; 379 if (my_archive_requested_bottom < _requested_static_archive_bottom || 380 my_archive_requested_top <= _requested_static_archive_bottom) { 381 // Size overflow. 382 log_error(cds)("my_archive_requested_bottom = " INTPTR_FORMAT, p2i(my_archive_requested_bottom)); 383 log_error(cds)("my_archive_requested_top = " INTPTR_FORMAT, p2i(my_archive_requested_top)); 384 log_error(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is too high. " 385 "Please rerun java -Xshare:dump with a lower value", p2i(_requested_static_archive_bottom)); 386 vm_direct_exit(0); 387 } 388 389 if (DumpSharedSpaces) { 390 // We don't want any valid object to be at the very bottom of the archive. 391 // See ArchivePtrMarker::mark_pointer(). 392 rw_region()->allocate(16); 393 } 394 395 return buffer_bottom; 396 } 397 398 void ArchiveBuilder::iterate_sorted_roots(MetaspaceClosure* it, bool is_relocating_pointers) { 399 int i; 400 401 if (!is_relocating_pointers) { 402 // Don't relocate _symbol, so we can safely call decrement_refcount on the 403 // original symbols. 404 int num_symbols = _symbols->length(); 405 for (i = 0; i < num_symbols; i++) { 406 it->push(_symbols->adr_at(i)); 407 } 408 } 409 410 int num_klasses = _klasses->length(); 411 for (i = 0; i < num_klasses; i++) { 412 it->push(_klasses->adr_at(i)); 413 } 414 415 iterate_roots(it, is_relocating_pointers); 416 } 417 418 class GatherSortedSourceObjs : public MetaspaceClosure { 419 ArchiveBuilder* _builder; 420 421 public: 422 GatherSortedSourceObjs(ArchiveBuilder* builder) : _builder(builder) {} 423 424 virtual bool do_ref(Ref* ref, bool read_only) { 425 return _builder->gather_one_source_obj(enclosing_ref(), ref, read_only); 426 } 427 428 virtual void push_special(SpecialRef type, Ref* ref, intptr_t* p) { 429 assert(type == _method_entry_ref, "only special type allowed for now"); 430 address src_obj = ref->obj(); 431 size_t field_offset = pointer_delta(p, src_obj, sizeof(u1)); 432 _builder->add_special_ref(type, src_obj, field_offset); 433 }; 434 435 virtual void do_pending_ref(Ref* ref) { 436 if (ref->obj() != NULL) { 437 _builder->remember_embedded_pointer_in_copied_obj(enclosing_ref(), ref); 438 } 439 } 440 }; 441 442 bool ArchiveBuilder::gather_one_source_obj(MetaspaceClosure::Ref* enclosing_ref, 443 MetaspaceClosure::Ref* ref, bool read_only) { 444 address src_obj = ref->obj(); 445 if (src_obj == NULL) { 446 return false; 447 } 448 ref->set_keep_after_pushing(); 449 remember_embedded_pointer_in_copied_obj(enclosing_ref, ref); 450 451 FollowMode follow_mode = get_follow_mode(ref); 452 SourceObjInfo src_info(ref, read_only, follow_mode); 453 bool created; 454 SourceObjInfo* p = _src_obj_table.put_if_absent(src_obj, src_info, &created); 455 if (created) { 456 if (_src_obj_table.maybe_grow()) { 457 log_info(cds, hashtables)("Expanded _src_obj_table table to %d", _src_obj_table.table_size()); 458 } 459 } 460 461 assert(p->read_only() == src_info.read_only(), "must be"); 462 463 if (created && src_info.should_copy()) { 464 ref->set_user_data((void*)p); 465 if (read_only) { 466 _ro_src_objs.append(enclosing_ref, p); 467 } else { 468 _rw_src_objs.append(enclosing_ref, p); 469 } 470 return true; // Need to recurse into this ref only if we are copying it 471 } else { 472 return false; 473 } 474 } 475 476 void ArchiveBuilder::add_special_ref(MetaspaceClosure::SpecialRef type, address src_obj, size_t field_offset) { 477 _special_refs->append(SpecialRefInfo(type, src_obj, field_offset)); 478 } 479 480 void ArchiveBuilder::remember_embedded_pointer_in_copied_obj(MetaspaceClosure::Ref* enclosing_ref, 481 MetaspaceClosure::Ref* ref) { 482 assert(ref->obj() != NULL, "should have checked"); 483 484 if (enclosing_ref != NULL) { 485 SourceObjInfo* src_info = (SourceObjInfo*)enclosing_ref->user_data(); 486 if (src_info == NULL) { 487 // source objects of point_to_it/set_to_null types are not copied 488 // so we don't need to remember their pointers. 489 } else { 490 if (src_info->read_only()) { 491 _ro_src_objs.remember_embedded_pointer(src_info, ref); 492 } else { 493 _rw_src_objs.remember_embedded_pointer(src_info, ref); 494 } 495 } 496 } 497 } 498 499 void ArchiveBuilder::gather_source_objs() { 500 ResourceMark rm; 501 log_info(cds)("Gathering all archivable objects ... "); 502 gather_klasses_and_symbols(); 503 GatherSortedSourceObjs doit(this); 504 iterate_sorted_roots(&doit, /*is_relocating_pointers=*/false); 505 doit.finish(); 506 } 507 508 bool ArchiveBuilder::is_excluded(Klass* klass) { 509 if (klass->is_instance_klass()) { 510 InstanceKlass* ik = InstanceKlass::cast(klass); 511 return SystemDictionaryShared::is_excluded_class(ik); 512 } else if (klass->is_objArray_klass()) { 513 if (DynamicDumpSharedSpaces) { 514 // Don't support archiving of array klasses for now (WHY???) 515 return true; 516 } 517 Klass* bottom = ObjArrayKlass::cast(klass)->bottom_klass(); 518 if (bottom->is_instance_klass()) { 519 return SystemDictionaryShared::is_excluded_class(InstanceKlass::cast(bottom)); 520 } 521 } 522 523 return false; 524 } 525 526 ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref *ref) { 527 address obj = ref->obj(); 528 if (MetaspaceShared::is_in_shared_metaspace(obj)) { 529 // Don't dump existing shared metadata again. 530 return point_to_it; 531 } else if (ref->msotype() == MetaspaceObj::MethodDataType || 532 ref->msotype() == MetaspaceObj::MethodCountersType) { 533 return set_to_null; 534 } else { 535 if (ref->msotype() == MetaspaceObj::ClassType) { 536 Klass* klass = (Klass*)ref->obj(); 537 assert(klass->is_klass(), "must be"); 538 if (is_excluded(klass)) { 539 ResourceMark rm; 540 log_debug(cds, dynamic)("Skipping class (excluded): %s", klass->external_name()); 541 return set_to_null; 542 } 543 } 544 545 return make_a_copy; 546 } 547 } 548 549 void ArchiveBuilder::start_dump_space(DumpRegion* next) { 550 address bottom = _last_verified_top; 551 address top = (address)(current_dump_space()->top()); 552 _other_region_used_bytes += size_t(top - bottom); 553 554 current_dump_space()->pack(next); 555 _current_dump_space = next; 556 _num_dump_regions_used ++; 557 558 _last_verified_top = (address)(current_dump_space()->top()); 559 } 560 561 void ArchiveBuilder::verify_estimate_size(size_t estimate, const char* which) { 562 address bottom = _last_verified_top; 563 address top = (address)(current_dump_space()->top()); 564 size_t used = size_t(top - bottom) + _other_region_used_bytes; 565 int diff = int(estimate) - int(used); 566 567 log_info(cds)("%s estimate = " SIZE_FORMAT " used = " SIZE_FORMAT "; diff = %d bytes", which, estimate, used, diff); 568 assert(diff >= 0, "Estimate is too small"); 569 570 _last_verified_top = top; 571 _other_region_used_bytes = 0; 572 } 573 574 void ArchiveBuilder::dump_rw_metadata() { 575 ResourceMark rm; 576 log_info(cds)("Allocating RW objects ... "); 577 make_shallow_copies(&_rw_region, &_rw_src_objs); 578 579 #if INCLUDE_CDS_JAVA_HEAP 580 if (is_dumping_full_module_graph()) { 581 // Archive the ModuleEntry's and PackageEntry's of the 3 built-in loaders 582 char* start = rw_region()->top(); 583 ClassLoaderDataShared::allocate_archived_tables(); 584 alloc_stats()->record_modules(rw_region()->top() - start, /*read_only*/false); 585 } 586 #endif 587 } 588 589 void ArchiveBuilder::dump_ro_metadata() { 590 ResourceMark rm; 591 log_info(cds)("Allocating RO objects ... "); 592 593 start_dump_space(&_ro_region); 594 make_shallow_copies(&_ro_region, &_ro_src_objs); 595 596 #if INCLUDE_CDS_JAVA_HEAP 597 if (is_dumping_full_module_graph()) { 598 char* start = ro_region()->top(); 599 ClassLoaderDataShared::init_archived_tables(); 600 alloc_stats()->record_modules(ro_region()->top() - start, /*read_only*/true); 601 } 602 #endif 603 } 604 605 void ArchiveBuilder::make_shallow_copies(DumpRegion *dump_region, 606 const ArchiveBuilder::SourceObjList* src_objs) { 607 for (int i = 0; i < src_objs->objs()->length(); i++) { 608 make_shallow_copy(dump_region, src_objs->objs()->at(i)); 609 } 610 log_info(cds)("done (%d objects)", src_objs->objs()->length()); 611 } 612 613 void ArchiveBuilder::make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info) { 614 MetaspaceClosure::Ref* ref = src_info->ref(); 615 address src = ref->obj(); 616 int bytes = src_info->size_in_bytes(); 617 char* dest; 618 char* oldtop; 619 char* newtop; 620 621 oldtop = dump_region->top(); 622 if (ref->msotype() == MetaspaceObj::ClassType) { 623 // Reserve space for a pointer immediately in front of an InstanceKlass. That space will 624 // later be used to store the RuntimeClassInfo* pointer directly in front of the archived 625 // InstanceKlass, in order to have a quick lookup InstanceKlass* -> RunTimeClassInfo* 626 // without building another hashtable. See RunTimeClassInfo::get_for()/::set_for() for 627 // details. 628 Klass* klass = (Klass*)src; 629 if (klass->is_instance_klass()) { 630 SystemDictionaryShared::validate_before_archiving(InstanceKlass::cast(klass)); 631 dump_region->allocate(sizeof(address)); 632 } 633 dest = dump_region->allocate(bytes, KlassAlignmentInBytes); 634 } else { 635 dest = dump_region->allocate(bytes); 636 } 637 newtop = dump_region->top(); 638 639 memcpy(dest, src, bytes); 640 641 intptr_t* archived_vtable = CppVtables::get_archived_vtable(ref->msotype(), (address)dest); 642 if (archived_vtable != NULL) { 643 *(address*)dest = (address)archived_vtable; 644 ArchivePtrMarker::mark_pointer((address*)dest); 645 } 646 647 log_trace(cds)("Copy: " PTR_FORMAT " ==> " PTR_FORMAT " %d (%s)", p2i(src), p2i(dest), bytes, 648 MetaspaceObj::type_name(ref->msotype())); 649 src_info->set_dumped_addr((address)dest); 650 651 _alloc_stats.record(ref->msotype(), int(newtop - oldtop), src_info->read_only()); 652 653 DEBUG_ONLY(_alloc_stats.verify((int)dump_region->used(), src_info->read_only())); 654 } 655 656 address ArchiveBuilder::get_dumped_addr(address src_obj) const { 657 SourceObjInfo* p = _src_obj_table.get(src_obj); 658 assert(p != NULL, "must be"); 659 660 return p->dumped_addr(); 661 } 662 663 void ArchiveBuilder::relocate_embedded_pointers(ArchiveBuilder::SourceObjList* src_objs) { 664 for (int i = 0; i < src_objs->objs()->length(); i++) { 665 src_objs->relocate(i, this); 666 } 667 } 668 669 void ArchiveBuilder::update_special_refs() { 670 for (int i = 0; i < _special_refs->length(); i++) { 671 SpecialRefInfo s = _special_refs->at(i); 672 size_t field_offset = s.field_offset(); 673 address src_obj = s.src_obj(); 674 address dst_obj = get_dumped_addr(src_obj); 675 intptr_t* src_p = (intptr_t*)(src_obj + field_offset); 676 intptr_t* dst_p = (intptr_t*)(dst_obj + field_offset); 677 assert(s.type() == MetaspaceClosure::_method_entry_ref, "only special type allowed for now"); 678 679 assert(*src_p == *dst_p, "must be a copy"); 680 ArchivePtrMarker::mark_pointer((address*)dst_p); 681 } 682 } 683 684 class RefRelocator: public MetaspaceClosure { 685 ArchiveBuilder* _builder; 686 687 public: 688 RefRelocator(ArchiveBuilder* builder) : _builder(builder) {} 689 690 virtual bool do_ref(Ref* ref, bool read_only) { 691 if (ref->not_null()) { 692 ref->update(_builder->get_dumped_addr(ref->obj())); 693 ArchivePtrMarker::mark_pointer(ref->addr()); 694 } 695 return false; // Do not recurse. 696 } 697 }; 698 699 void ArchiveBuilder::relocate_roots() { 700 log_info(cds)("Relocating external roots ... "); 701 ResourceMark rm; 702 RefRelocator doit(this); 703 iterate_sorted_roots(&doit, /*is_relocating_pointers=*/true); 704 doit.finish(); 705 log_info(cds)("done"); 706 } 707 708 void ArchiveBuilder::relocate_metaspaceobj_embedded_pointers() { 709 log_info(cds)("Relocating embedded pointers in core regions ... "); 710 relocate_embedded_pointers(&_rw_src_objs); 711 relocate_embedded_pointers(&_ro_src_objs); 712 update_special_refs(); 713 } 714 715 // We must relocate vmClasses::_klasses[] only after we have copied the 716 // java objects in during dump_java_heap_objects(): during the object copy, we operate on 717 // old objects which assert that their klass is the original klass. 718 void ArchiveBuilder::relocate_vm_classes() { 719 log_info(cds)("Relocating vmClasses::_klasses[] ... "); 720 ResourceMark rm; 721 RefRelocator doit(this); 722 vmClasses::metaspace_pointers_do(&doit); 723 } 724 725 void ArchiveBuilder::make_klasses_shareable() { 726 int num_instance_klasses = 0; 727 int num_boot_klasses = 0; 728 int num_platform_klasses = 0; 729 int num_app_klasses = 0; 730 int num_hidden_klasses = 0; 731 int num_unlinked_klasses = 0; 732 int num_unregistered_klasses = 0; 733 int num_obj_array_klasses = 0; 734 int num_type_array_klasses = 0; 735 736 for (int i = 0; i < klasses()->length(); i++) { 737 const char* type; 738 const char* unlinked = ""; 739 const char* hidden = ""; 740 Klass* k = klasses()->at(i); 741 k->remove_java_mirror(); 742 Klass* requested_k = to_requested(k); 743 #ifdef _LP64 744 narrowKlass nk = CompressedKlassPointers::encode_not_null(requested_k, _requested_static_archive_bottom); 745 k->set_prototype_header(markWord::prototype().set_narrow_klass(nk)); 746 #else 747 k->set_prototype_header(markWord::prototype()); 748 #endif 749 if (k->is_objArray_klass()) { 750 // InstanceKlass and TypeArrayKlass will in turn call remove_unshareable_info 751 // on their array classes. 752 num_obj_array_klasses ++; 753 type = "array"; 754 } else if (k->is_typeArray_klass()) { 755 num_type_array_klasses ++; 756 type = "array"; 757 k->remove_unshareable_info(); 758 } else { 759 assert(k->is_instance_klass(), " must be"); 760 num_instance_klasses ++; 761 InstanceKlass* ik = InstanceKlass::cast(k); 762 if (DynamicDumpSharedSpaces) { 763 // For static dump, class loader type are already set. 764 ik->assign_class_loader_type(); 765 } 766 if (ik->is_shared_boot_class()) { 767 type = "boot"; 768 num_boot_klasses ++; 769 } else if (ik->is_shared_platform_class()) { 770 type = "plat"; 771 num_platform_klasses ++; 772 } else if (ik->is_shared_app_class()) { 773 type = "app"; 774 num_app_klasses ++; 775 } else { 776 assert(ik->is_shared_unregistered_class(), "must be"); 777 type = "unreg"; 778 num_unregistered_klasses ++; 779 } 780 781 if (!ik->is_linked()) { 782 num_unlinked_klasses ++; 783 unlinked = " ** unlinked"; 784 } 785 786 if (ik->is_hidden()) { 787 num_hidden_klasses ++; 788 hidden = " ** hidden"; 789 } 790 791 MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread::current(), ik); 792 ik->remove_unshareable_info(); 793 } 794 795 if (log_is_enabled(Debug, cds, class)) { 796 ResourceMark rm; 797 log_debug(cds, class)("klasses[%5d] = " PTR_FORMAT " %-5s %s%s%s", i, p2i(to_requested(k)), type, k->external_name(), hidden, unlinked); 798 } 799 } 800 801 log_info(cds)("Number of classes %d", num_instance_klasses + num_obj_array_klasses + num_type_array_klasses); 802 log_info(cds)(" instance classes = %5d", num_instance_klasses); 803 log_info(cds)(" boot = %5d", num_boot_klasses); 804 log_info(cds)(" app = %5d", num_app_klasses); 805 log_info(cds)(" platform = %5d", num_platform_klasses); 806 log_info(cds)(" unregistered = %5d", num_unregistered_klasses); 807 log_info(cds)(" (hidden) = %5d", num_hidden_klasses); 808 log_info(cds)(" (unlinked) = %5d", num_unlinked_klasses); 809 log_info(cds)(" obj array classes = %5d", num_obj_array_klasses); 810 log_info(cds)(" type array classes = %5d", num_type_array_klasses); 811 log_info(cds)(" symbols = %5d", _symbols->length()); 812 } 813 814 uintx ArchiveBuilder::buffer_to_offset(address p) const { 815 address requested_p = to_requested(p); 816 assert(requested_p >= _requested_static_archive_bottom, "must be"); 817 return requested_p - _requested_static_archive_bottom; 818 } 819 820 uintx ArchiveBuilder::any_to_offset(address p) const { 821 if (is_in_mapped_static_archive(p)) { 822 assert(DynamicDumpSharedSpaces, "must be"); 823 return p - _mapped_static_archive_bottom; 824 } 825 return buffer_to_offset(p); 826 } 827 828 // Update a Java object to point its Klass* to the new location after 829 // shared archive has been compacted. 830 void ArchiveBuilder::relocate_klass_ptr(oop o) { 831 assert(DumpSharedSpaces, "sanity"); 832 Klass* k = get_relocated_klass(o->klass()); 833 Klass* requested_k = to_requested(k); 834 narrowKlass nk = CompressedKlassPointers::encode_not_null(requested_k, _requested_static_archive_bottom); 835 #ifdef _LP64 836 o->set_mark(o->mark().set_narrow_klass(nk)); 837 #endif 838 } 839 840 // RelocateBufferToRequested --- Relocate all the pointers in rw/ro, 841 // so that the archive can be mapped to the "requested" location without runtime relocation. 842 // 843 // - See ArchiveBuilder header for the definition of "buffer", "mapped" and "requested" 844 // - ArchivePtrMarker::ptrmap() marks all the pointers in the rw/ro regions 845 // - Every pointer must have one of the following values: 846 // [a] NULL: 847 // No relocation is needed. Remove this pointer from ptrmap so we don't need to 848 // consider it at runtime. 849 // [b] Points into an object X which is inside the buffer: 850 // Adjust this pointer by _buffer_to_requested_delta, so it points to X 851 // when the archive is mapped at the requested location. 852 // [c] Points into an object Y which is inside mapped static archive: 853 // - This happens only during dynamic dump 854 // - Adjust this pointer by _mapped_to_requested_static_archive_delta, 855 // so it points to Y when the static archive is mapped at the requested location. 856 template <bool STATIC_DUMP> 857 class RelocateBufferToRequested : public BitMapClosure { 858 ArchiveBuilder* _builder; 859 address _buffer_bottom; 860 intx _buffer_to_requested_delta; 861 intx _mapped_to_requested_static_archive_delta; 862 size_t _max_non_null_offset; 863 864 public: 865 RelocateBufferToRequested(ArchiveBuilder* builder) { 866 _builder = builder; 867 _buffer_bottom = _builder->buffer_bottom(); 868 _buffer_to_requested_delta = builder->buffer_to_requested_delta(); 869 _mapped_to_requested_static_archive_delta = builder->requested_static_archive_bottom() - builder->mapped_static_archive_bottom(); 870 _max_non_null_offset = 0; 871 872 address bottom = _builder->buffer_bottom(); 873 address top = _builder->buffer_top(); 874 address new_bottom = bottom + _buffer_to_requested_delta; 875 address new_top = top + _buffer_to_requested_delta; 876 log_debug(cds)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT "] to " 877 "[" INTPTR_FORMAT " - " INTPTR_FORMAT "]", 878 p2i(bottom), p2i(top), 879 p2i(new_bottom), p2i(new_top)); 880 } 881 882 bool do_bit(size_t offset) { 883 address* p = (address*)_buffer_bottom + offset; 884 assert(_builder->is_in_buffer_space(p), "pointer must live in buffer space"); 885 886 if (*p == NULL) { 887 // todo -- clear bit, etc 888 ArchivePtrMarker::ptrmap()->clear_bit(offset); 889 } else { 890 if (STATIC_DUMP) { 891 assert(_builder->is_in_buffer_space(*p), "old pointer must point inside buffer space"); 892 *p += _buffer_to_requested_delta; 893 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive"); 894 } else { 895 if (_builder->is_in_buffer_space(*p)) { 896 *p += _buffer_to_requested_delta; 897 // assert is in requested dynamic archive 898 } else { 899 assert(_builder->is_in_mapped_static_archive(*p), "old pointer must point inside buffer space or mapped static archive"); 900 *p += _mapped_to_requested_static_archive_delta; 901 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive"); 902 } 903 } 904 _max_non_null_offset = offset; 905 } 906 907 return true; // keep iterating 908 } 909 910 void doit() { 911 ArchivePtrMarker::ptrmap()->iterate(this); 912 ArchivePtrMarker::compact(_max_non_null_offset); 913 } 914 }; 915 916 917 void ArchiveBuilder::relocate_to_requested() { 918 ro_region()->pack(); 919 920 size_t my_archive_size = buffer_top() - buffer_bottom(); 921 922 if (DumpSharedSpaces) { 923 _requested_static_archive_top = _requested_static_archive_bottom + my_archive_size; 924 RelocateBufferToRequested<true> patcher(this); 925 patcher.doit(); 926 } else { 927 assert(DynamicDumpSharedSpaces, "must be"); 928 _requested_dynamic_archive_top = _requested_dynamic_archive_bottom + my_archive_size; 929 RelocateBufferToRequested<false> patcher(this); 930 patcher.doit(); 931 } 932 } 933 934 // Write detailed info to a mapfile to analyze contents of the archive. 935 // static dump: 936 // java -Xshare:dump -Xlog:cds+map=trace:file=cds.map:none:filesize=0 937 // dynamic dump: 938 // java -cp MyApp.jar -XX:ArchiveClassesAtExit=MyApp.jsa \ 939 // -Xlog:cds+map=trace:file=cds.map:none:filesize=0 MyApp 940 // 941 // We need to do some address translation because the buffers used at dump time may be mapped to 942 // a different location at runtime. At dump time, the buffers may be at arbitrary locations 943 // picked by the OS. At runtime, we try to map at a fixed location (SharedBaseAddress). For 944 // consistency, we log everything using runtime addresses. 945 class ArchiveBuilder::CDSMapLogger : AllStatic { 946 static intx buffer_to_runtime_delta() { 947 // Translate the buffers used by the RW/RO regions to their eventual (requested) locations 948 // at runtime. 949 return ArchiveBuilder::current()->buffer_to_requested_delta(); 950 } 951 952 // rw/ro regions only 953 static void log_metaspace_region(const char* name, DumpRegion* region, 954 const ArchiveBuilder::SourceObjList* src_objs) { 955 address region_base = address(region->base()); 956 address region_top = address(region->top()); 957 log_region(name, region_base, region_top, region_base + buffer_to_runtime_delta()); 958 log_metaspace_objects(region, src_objs); 959 } 960 961 #define _LOG_PREFIX PTR_FORMAT ": @@ %-17s %d" 962 963 static void log_klass(Klass* k, address runtime_dest, const char* type_name, int bytes, Thread* current) { 964 ResourceMark rm(current); 965 log_debug(cds, map)(_LOG_PREFIX " %s", 966 p2i(runtime_dest), type_name, bytes, k->external_name()); 967 } 968 static void log_method(Method* m, address runtime_dest, const char* type_name, int bytes, Thread* current) { 969 ResourceMark rm(current); 970 log_debug(cds, map)(_LOG_PREFIX " %s", 971 p2i(runtime_dest), type_name, bytes, m->external_name()); 972 } 973 974 // rw/ro regions only 975 static void log_metaspace_objects(DumpRegion* region, const ArchiveBuilder::SourceObjList* src_objs) { 976 address last_obj_base = address(region->base()); 977 address last_obj_end = address(region->base()); 978 address region_end = address(region->end()); 979 Thread* current = Thread::current(); 980 for (int i = 0; i < src_objs->objs()->length(); i++) { 981 SourceObjInfo* src_info = src_objs->at(i); 982 address src = src_info->orig_obj(); 983 address dest = src_info->dumped_addr(); 984 log_data(last_obj_base, dest, last_obj_base + buffer_to_runtime_delta()); 985 address runtime_dest = dest + buffer_to_runtime_delta(); 986 int bytes = src_info->size_in_bytes(); 987 988 MetaspaceObj::Type type = src_info->msotype(); 989 const char* type_name = MetaspaceObj::type_name(type); 990 991 switch (type) { 992 case MetaspaceObj::ClassType: 993 log_klass((Klass*)src, runtime_dest, type_name, bytes, current); 994 break; 995 case MetaspaceObj::ConstantPoolType: 996 log_klass(((ConstantPool*)src)->pool_holder(), 997 runtime_dest, type_name, bytes, current); 998 break; 999 case MetaspaceObj::ConstantPoolCacheType: 1000 log_klass(((ConstantPoolCache*)src)->constant_pool()->pool_holder(), 1001 runtime_dest, type_name, bytes, current); 1002 break; 1003 case MetaspaceObj::MethodType: 1004 log_method((Method*)src, runtime_dest, type_name, bytes, current); 1005 break; 1006 case MetaspaceObj::ConstMethodType: 1007 log_method(((ConstMethod*)src)->method(), runtime_dest, type_name, bytes, current); 1008 break; 1009 case MetaspaceObj::SymbolType: 1010 { 1011 ResourceMark rm(current); 1012 Symbol* s = (Symbol*)src; 1013 log_debug(cds, map)(_LOG_PREFIX " %s", p2i(runtime_dest), type_name, bytes, 1014 s->as_quoted_ascii()); 1015 } 1016 break; 1017 default: 1018 log_debug(cds, map)(_LOG_PREFIX, p2i(runtime_dest), type_name, bytes); 1019 break; 1020 } 1021 1022 last_obj_base = dest; 1023 last_obj_end = dest + bytes; 1024 } 1025 1026 log_data(last_obj_base, last_obj_end, last_obj_base + buffer_to_runtime_delta()); 1027 if (last_obj_end < region_end) { 1028 log_debug(cds, map)(PTR_FORMAT ": @@ Misc data " SIZE_FORMAT " bytes", 1029 p2i(last_obj_end + buffer_to_runtime_delta()), 1030 size_t(region_end - last_obj_end)); 1031 log_data(last_obj_end, region_end, last_obj_end + buffer_to_runtime_delta()); 1032 } 1033 } 1034 1035 #undef _LOG_PREFIX 1036 1037 // Log information about a region, whose address at dump time is [base .. top). At 1038 // runtime, this region will be mapped to runtime_base. runtime_base is 0 if this 1039 // region will be mapped at os-selected addresses (such as the bitmap region), or will 1040 // be accessed with os::read (the header). 1041 static void log_region(const char* name, address base, address top, address runtime_base) { 1042 size_t size = top - base; 1043 base = runtime_base; 1044 top = runtime_base + size; 1045 log_info(cds, map)("[%-18s " PTR_FORMAT " - " PTR_FORMAT " " SIZE_FORMAT_W(9) " bytes]", 1046 name, p2i(base), p2i(top), size); 1047 } 1048 1049 // open and closed archive regions 1050 static void log_heap_regions(const char* which, GrowableArray<MemRegion> *regions) { 1051 #if INCLUDE_CDS_JAVA_HEAP 1052 for (int i = 0; i < regions->length(); i++) { 1053 address start = address(regions->at(i).start()); 1054 address end = address(regions->at(i).end()); 1055 log_region(which, start, end, start); 1056 1057 while (start < end) { 1058 size_t byte_size; 1059 oop archived_oop = cast_to_oop(start); 1060 oop original_oop = HeapShared::get_original_object(archived_oop); 1061 if (original_oop != NULL) { 1062 ResourceMark rm; 1063 log_info(cds, map)(PTR_FORMAT ": @@ Object %s", 1064 p2i(start), original_oop->klass()->external_name()); 1065 byte_size = original_oop->size() * BytesPerWord; 1066 } else if (archived_oop == HeapShared::roots()) { 1067 // HeapShared::roots() is copied specially so it doesn't exist in 1068 // HeapShared::OriginalObjectTable. See HeapShared::copy_roots(). 1069 log_info(cds, map)(PTR_FORMAT ": @@ Object HeapShared:roots (ObjArray)", 1070 p2i(start)); 1071 byte_size = objArrayOopDesc::object_size(HeapShared::roots()->length()) * BytesPerWord; 1072 } else { 1073 // We have reached the end of the region 1074 break; 1075 } 1076 address oop_end = start + byte_size; 1077 log_data(start, oop_end, start, /*is_heap=*/true); 1078 start = oop_end; 1079 } 1080 if (start < end) { 1081 log_info(cds, map)(PTR_FORMAT ": @@ Unused heap space " SIZE_FORMAT " bytes", 1082 p2i(start), size_t(end - start)); 1083 log_data(start, end, start, /*is_heap=*/true); 1084 } 1085 } 1086 #endif 1087 } 1088 1089 // Log all the data [base...top). Pretend that the base address 1090 // will be mapped to runtime_base at run-time. 1091 static void log_data(address base, address top, address runtime_base, bool is_heap = false) { 1092 assert(top >= base, "must be"); 1093 1094 LogStreamHandle(Trace, cds, map) lsh; 1095 if (lsh.is_enabled()) { 1096 int unitsize = sizeof(address); 1097 if (is_heap && UseCompressedOops) { 1098 // This makes the compressed oop pointers easier to read, but 1099 // longs and doubles will be split into two words. 1100 unitsize = sizeof(narrowOop); 1101 } 1102 os::print_hex_dump(&lsh, base, top, unitsize, 32, runtime_base); 1103 } 1104 } 1105 1106 static void log_header(FileMapInfo* mapinfo) { 1107 LogStreamHandle(Info, cds, map) lsh; 1108 if (lsh.is_enabled()) { 1109 mapinfo->print(&lsh); 1110 } 1111 } 1112 1113 public: 1114 static void log(ArchiveBuilder* builder, FileMapInfo* mapinfo, 1115 GrowableArray<MemRegion> *closed_heap_regions, 1116 GrowableArray<MemRegion> *open_heap_regions, 1117 char* bitmap, size_t bitmap_size_in_bytes) { 1118 log_info(cds, map)("%s CDS archive map for %s", DumpSharedSpaces ? "Static" : "Dynamic", mapinfo->full_path()); 1119 1120 address header = address(mapinfo->header()); 1121 address header_end = header + mapinfo->header()->header_size(); 1122 log_region("header", header, header_end, 0); 1123 log_header(mapinfo); 1124 log_data(header, header_end, 0); 1125 1126 DumpRegion* rw_region = &builder->_rw_region; 1127 DumpRegion* ro_region = &builder->_ro_region; 1128 1129 log_metaspace_region("rw region", rw_region, &builder->_rw_src_objs); 1130 log_metaspace_region("ro region", ro_region, &builder->_ro_src_objs); 1131 1132 address bitmap_end = address(bitmap + bitmap_size_in_bytes); 1133 log_region("bitmap", address(bitmap), bitmap_end, 0); 1134 log_data((address)bitmap, bitmap_end, 0); 1135 1136 if (closed_heap_regions != NULL) { 1137 log_heap_regions("closed heap region", closed_heap_regions); 1138 } 1139 if (open_heap_regions != NULL) { 1140 log_heap_regions("open heap region", open_heap_regions); 1141 } 1142 1143 log_info(cds, map)("[End of CDS archive map]"); 1144 } 1145 }; // end ArchiveBuilder::CDSMapLogger 1146 1147 void ArchiveBuilder::print_stats() { 1148 _alloc_stats.print_stats(int(_ro_region.used()), int(_rw_region.used())); 1149 } 1150 1151 void ArchiveBuilder::clean_up_src_obj_table() { 1152 SrcObjTableCleaner cleaner; 1153 _src_obj_table.iterate(&cleaner); 1154 } 1155 1156 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo, 1157 GrowableArray<MemRegion>* closed_heap_regions, 1158 GrowableArray<MemRegion>* open_heap_regions, 1159 GrowableArray<ArchiveHeapOopmapInfo>* closed_heap_oopmaps, 1160 GrowableArray<ArchiveHeapOopmapInfo>* open_heap_oopmaps) { 1161 // Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with 1162 // MetaspaceShared::n_regions (internal to hotspot). 1163 assert(NUM_CDS_REGIONS == MetaspaceShared::n_regions, "sanity"); 1164 1165 write_region(mapinfo, MetaspaceShared::rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false); 1166 write_region(mapinfo, MetaspaceShared::ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false); 1167 1168 size_t bitmap_size_in_bytes; 1169 char* bitmap = mapinfo->write_bitmap_region(ArchivePtrMarker::ptrmap(), closed_heap_oopmaps, open_heap_oopmaps, 1170 bitmap_size_in_bytes); 1171 1172 if (closed_heap_regions != NULL) { 1173 _total_closed_heap_region_size = mapinfo->write_heap_regions( 1174 closed_heap_regions, 1175 closed_heap_oopmaps, 1176 MetaspaceShared::first_closed_heap_region, 1177 MetaspaceShared::max_num_closed_heap_regions); 1178 _total_open_heap_region_size = mapinfo->write_heap_regions( 1179 open_heap_regions, 1180 open_heap_oopmaps, 1181 MetaspaceShared::first_open_heap_region, 1182 MetaspaceShared::max_num_open_heap_regions); 1183 } 1184 1185 print_region_stats(mapinfo, closed_heap_regions, open_heap_regions); 1186 1187 mapinfo->set_requested_base((char*)MetaspaceShared::requested_base_address()); 1188 mapinfo->set_header_crc(mapinfo->compute_header_crc()); 1189 // After this point, we should not write any data into mapinfo->header() since this 1190 // would corrupt its checksum we have calculated before. 1191 mapinfo->write_header(); 1192 mapinfo->close(); 1193 1194 if (log_is_enabled(Info, cds)) { 1195 print_stats(); 1196 } 1197 1198 if (log_is_enabled(Info, cds, map)) { 1199 CDSMapLogger::log(this, mapinfo, closed_heap_regions, open_heap_regions, 1200 bitmap, bitmap_size_in_bytes); 1201 } 1202 CDS_JAVA_HEAP_ONLY(HeapShared::destroy_archived_object_cache()); 1203 FREE_C_HEAP_ARRAY(char, bitmap); 1204 } 1205 1206 void ArchiveBuilder::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) { 1207 mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec); 1208 } 1209 1210 void ArchiveBuilder::print_region_stats(FileMapInfo *mapinfo, 1211 GrowableArray<MemRegion>* closed_heap_regions, 1212 GrowableArray<MemRegion>* open_heap_regions) { 1213 // Print statistics of all the regions 1214 const size_t bitmap_used = mapinfo->space_at(MetaspaceShared::bm)->used(); 1215 const size_t bitmap_reserved = mapinfo->space_at(MetaspaceShared::bm)->used_aligned(); 1216 const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() + 1217 bitmap_reserved + 1218 _total_closed_heap_region_size + 1219 _total_open_heap_region_size; 1220 const size_t total_bytes = _ro_region.used() + _rw_region.used() + 1221 bitmap_used + 1222 _total_closed_heap_region_size + 1223 _total_open_heap_region_size; 1224 const double total_u_perc = percent_of(total_bytes, total_reserved); 1225 1226 _rw_region.print(total_reserved); 1227 _ro_region.print(total_reserved); 1228 1229 print_bitmap_region_stats(bitmap_used, total_reserved); 1230 1231 if (closed_heap_regions != NULL) { 1232 print_heap_region_stats(closed_heap_regions, "ca", total_reserved); 1233 print_heap_region_stats(open_heap_regions, "oa", total_reserved); 1234 } 1235 1236 log_debug(cds)("total : " SIZE_FORMAT_W(9) " [100.0%% of total] out of " SIZE_FORMAT_W(9) " bytes [%5.1f%% used]", 1237 total_bytes, total_reserved, total_u_perc); 1238 } 1239 1240 void ArchiveBuilder::print_bitmap_region_stats(size_t size, size_t total_size) { 1241 log_debug(cds)("bm space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used]", 1242 size, size/double(total_size)*100.0, size); 1243 } 1244 1245 void ArchiveBuilder::print_heap_region_stats(GrowableArray<MemRegion>* regions, 1246 const char *name, size_t total_size) { 1247 int arr_len = regions == NULL ? 0 : regions->length(); 1248 for (int i = 0; i < arr_len; i++) { 1249 char* start = (char*)regions->at(i).start(); 1250 size_t size = regions->at(i).byte_size(); 1251 char* top = start + size; 1252 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, 1253 name, i, size, size/double(total_size)*100.0, size, p2i(start)); 1254 } 1255 } 1256 1257 void ArchiveBuilder::report_out_of_space(const char* name, size_t needed_bytes) { 1258 // This is highly unlikely to happen on 64-bits because we have reserved a 4GB space. 1259 // On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes 1260 // or so. 1261 _rw_region.print_out_of_space_msg(name, needed_bytes); 1262 _ro_region.print_out_of_space_msg(name, needed_bytes); 1263 1264 vm_exit_during_initialization(err_msg("Unable to allocate from '%s' region", name), 1265 "Please reduce the number of shared classes."); 1266 } 1267 1268 1269 #ifndef PRODUCT 1270 void ArchiveBuilder::assert_is_vm_thread() { 1271 assert(Thread::current()->is_VM_thread(), "ArchiveBuilder should be used only inside the VMThread"); 1272 } 1273 #endif