1 /* 2 * Copyright (c) 2003, 2020, 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 #ifndef SHARE_MEMORY_FILEMAP_HPP 26 #define SHARE_MEMORY_FILEMAP_HPP 27 28 #include "classfile/classLoader.hpp" 29 #include "include/cds.h" 30 #include "memory/metaspaceShared.hpp" 31 #include "memory/metaspace.hpp" 32 #include "oops/compressedOops.hpp" 33 #include "utilities/align.hpp" 34 35 // Layout of the file: 36 // header: dump of archive instance plus versioning info, datestamp, etc. 37 // [magic # = 0xF00BABA2] 38 // ... padding to align on page-boundary 39 // read-write space 40 // read-only space 41 // misc data (block offset table, string table, symbols, dictionary, etc.) 42 // tag(666) 43 44 static const int JVM_IDENT_MAX = 256; 45 46 class CHeapBitMap; 47 48 class SharedClassPathEntry { 49 enum { 50 modules_image_entry, 51 jar_entry, 52 signed_jar_entry, 53 dir_entry, 54 non_existent_entry, 55 unknown_entry 56 }; 57 58 void set_name(const char* name, TRAPS); 59 60 u1 _type; 61 bool _from_class_path_attr; 62 time_t _timestamp; // jar timestamp, 0 if is directory, modules image or other 63 long _filesize; // jar/jimage file size, -1 if is directory, -2 if other 64 Array<char>* _name; 65 Array<u1>* _manifest; 66 67 public: 68 void init(bool is_modules_image, ClassPathEntry* cpe, TRAPS); 69 void init_as_non_existent(const char* path, TRAPS); 70 void metaspace_pointers_do(MetaspaceClosure* it); 71 bool validate(bool is_class_path = true) const; 72 73 // The _timestamp only gets set for jar files. 74 bool has_timestamp() const { 75 return _timestamp != 0; 76 } 77 bool is_dir() const { return _type == dir_entry; } 78 bool is_modules_image() const { return _type == modules_image_entry; } 79 bool is_jar() const { return _type == jar_entry; } 80 bool is_signed() const { return _type == signed_jar_entry; } 81 void set_is_signed() { 82 _type = signed_jar_entry; 83 } 84 bool from_class_path_attr() { return _from_class_path_attr; } 85 time_t timestamp() const { return _timestamp; } 86 long filesize() const { return _filesize; } 87 const char* name() const; 88 const char* manifest() const { 89 return (_manifest == NULL) ? NULL : (const char*)_manifest->data(); 90 } 91 int manifest_size() const { 92 return (_manifest == NULL) ? 0 : _manifest->length(); 93 } 94 void set_manifest(Array<u1>* manifest) { 95 _manifest = manifest; 96 } 97 bool check_non_existent() const; 98 void copy_from(SharedClassPathEntry* ent, ClassLoaderData* loader_data, TRAPS); 99 }; 100 101 struct ArchiveHeapOopmapInfo { 102 address _oopmap; // bitmap for relocating embedded oops 103 size_t _offset; // this oopmap is stored at this offset from the bottom of the BM region 104 size_t _oopmap_size_in_bits; 105 size_t _oopmap_size_in_bytes; 106 }; 107 108 class SharedPathTable { 109 Array<u8>* _table; 110 int _size; 111 public: 112 SharedPathTable() : _table(NULL), _size(0) {} 113 SharedPathTable(Array<u8>* table, int size) : _table(table), _size(size) {} 114 115 void dumptime_init(ClassLoaderData* loader_data, Thread* THREAD); 116 void metaspace_pointers_do(MetaspaceClosure* it); 117 118 int size() { 119 return _size; 120 } 121 SharedClassPathEntry* path_at(int index) { 122 if (index < 0) { 123 return NULL; 124 } 125 assert(index < _size, "sanity"); 126 char* p = (char*)_table->data(); 127 p += sizeof(SharedClassPathEntry) * index; 128 return (SharedClassPathEntry*)p; 129 } 130 Array<u8>* table() {return _table;} 131 void set_table(Array<u8>* table) {_table = table;} 132 }; 133 134 135 class FileMapRegion: private CDSFileMapRegion { 136 void assert_is_heap_region() const { 137 assert(_is_heap_region, "must be heap region"); 138 } 139 void assert_is_not_heap_region() const { 140 assert(!_is_heap_region, "must not be heap region"); 141 } 142 143 public: 144 static FileMapRegion* cast(CDSFileMapRegion* p) { 145 return (FileMapRegion*)p; 146 } 147 148 // Accessors 149 int crc() const { return _crc; } 150 size_t file_offset() const { return _file_offset; } 151 size_t mapping_offset() const { return _mapping_offset; } 152 size_t mapping_end_offset() const { return _mapping_offset + used_aligned(); } 153 size_t used() const { return _used; } 154 size_t used_aligned() const; // aligned up to os::vm_allocation_granularity() 155 char* mapped_base() const { assert_is_not_heap_region(); return _mapped_base; } 156 char* mapped_end() const { return mapped_base() + used_aligned(); } 157 bool read_only() const { return _read_only != 0; } 158 bool allow_exec() const { return _allow_exec != 0; } 159 bool mapped_from_file() const { return _mapped_from_file != 0; } 160 size_t oopmap_offset() const { assert_is_heap_region(); return _oopmap_offset; } 161 size_t oopmap_size_in_bits() const { assert_is_heap_region(); return _oopmap_size_in_bits; } 162 163 void set_file_offset(size_t s) { _file_offset = s; } 164 void set_read_only(bool v) { _read_only = v; } 165 void set_mapped_base(char* p) { _mapped_base = p; } 166 void set_mapped_from_file(bool v) { _mapped_from_file = v; } 167 void init(int region_index, char* base, size_t size, bool read_only, 168 bool allow_exec, int crc); 169 170 void init_oopmap(size_t oopmap_offset, size_t size_in_bits) { 171 _oopmap_offset = oopmap_offset; 172 _oopmap_size_in_bits = size_in_bits; 173 } 174 }; 175 176 class FileMapHeader: private CDSFileMapHeaderBase { 177 friend class CDSOffsets; 178 friend class VMStructs; 179 180 size_t _header_size; 181 182 // The following fields record the states of the VM during dump time. 183 // They are compared with the runtime states to see if the archive 184 // can be used. 185 size_t _alignment; // how shared archive should be aligned 186 int _obj_alignment; // value of ObjectAlignmentInBytes 187 address _narrow_oop_base; // compressed oop encoding base 188 int _narrow_oop_shift; // compressed oop encoding shift 189 bool _compact_strings; // value of CompactStrings 190 uintx _max_heap_size; // java max heap size during dumping 191 CompressedOops::Mode _narrow_oop_mode; // compressed oop encoding mode 192 int _narrow_klass_shift; // save narrow klass base and shift 193 bool _compressed_oops; // save the flag UseCompressedOops 194 bool _compressed_class_ptrs; // save the flag UseCompressedClassPointers 195 size_t _cloned_vtables_offset; // The address of the first cloned vtable 196 size_t _serialized_data_offset; // Data accessed using {ReadClosure,WriteClosure}::serialize() 197 size_t _i2i_entry_code_buffers_offset; 198 size_t _i2i_entry_code_buffers_size; 199 address _heap_end; // heap end at dump time. 200 bool _base_archive_is_default; // indicates if the base archive is the system default one 201 202 // The following fields are all sanity checks for whether this archive 203 // will function correctly with this JVM and the bootclasspath it's 204 // invoked with. 205 char _jvm_ident[JVM_IDENT_MAX]; // identifier string of the jvm that created this dump 206 207 // size of the base archive name including NULL terminator 208 size_t _base_archive_name_size; 209 210 // The following is a table of all the boot/app/module path entries that were used 211 // during dumping. At run time, we validate these entries according to their 212 // SharedClassPathEntry::_type. See: 213 // check_nonempty_dir_in_shared_path_table() 214 // validate_shared_path_table() 215 // validate_non_existent_class_paths() 216 size_t _shared_path_table_offset; 217 int _shared_path_table_size; 218 219 jshort _app_class_paths_start_index; // Index of first app classpath entry 220 jshort _app_module_paths_start_index; // Index of first module path entry 221 jshort _num_module_paths; // number of module path entries 222 jshort _max_used_path_index; // max path index referenced during CDS dump 223 bool _verify_local; // BytecodeVerificationLocal setting 224 bool _verify_remote; // BytecodeVerificationRemote setting 225 bool _has_platform_or_app_classes; // Archive contains app classes 226 char* _requested_base_address; // Archive relocation is not necessary if we map with this base address. 227 char* _mapped_base_address; // Actual base address where archive is mapped. 228 229 bool _allow_archiving_with_java_agent; // setting of the AllowArchivingWithJavaAgent option 230 size_t _ptrmap_size_in_bits; // Size of pointer relocation bitmap 231 232 char* from_mapped_offset(size_t offset) const { 233 return mapped_base_address() + offset; 234 } 235 void set_mapped_offset(char* p, size_t *offset) { 236 assert(p >= mapped_base_address(), "sanity"); 237 *offset = p - mapped_base_address(); 238 } 239 public: 240 // Accessors -- fields declared in CDSFileMapHeaderBase 241 unsigned int magic() const {return _magic;} 242 int crc() const { return _crc; } 243 int version() const { return _version; } 244 245 void set_crc(int crc_value) { _crc = crc_value; } 246 void set_version(int v) { _version = v; } 247 248 // Accessors -- fields declared in FileMapHeader 249 250 size_t header_size() const { return _header_size; } 251 size_t alignment() const { return _alignment; } 252 int obj_alignment() const { return _obj_alignment; } 253 address narrow_oop_base() const { return _narrow_oop_base; } 254 int narrow_oop_shift() const { return _narrow_oop_shift; } 255 bool compact_strings() const { return _compact_strings; } 256 uintx max_heap_size() const { return _max_heap_size; } 257 CompressedOops::Mode narrow_oop_mode() const { return _narrow_oop_mode; } 258 int narrow_klass_shift() const { return _narrow_klass_shift; } 259 address narrow_klass_base() const { return (address)mapped_base_address(); } 260 char* cloned_vtables() const { return from_mapped_offset(_cloned_vtables_offset); } 261 char* serialized_data() const { return from_mapped_offset(_serialized_data_offset); } 262 address i2i_entry_code_buffers() const { return (address)from_mapped_offset(_i2i_entry_code_buffers_offset); } 263 size_t i2i_entry_code_buffers_size() const { return _i2i_entry_code_buffers_size; } 264 address heap_end() const { return _heap_end; } 265 bool base_archive_is_default() const { return _base_archive_is_default; } 266 const char* jvm_ident() const { return _jvm_ident; } 267 size_t base_archive_name_size() const { return _base_archive_name_size; } 268 char* requested_base_address() const { return _requested_base_address; } 269 char* mapped_base_address() const { return _mapped_base_address; } 270 bool has_platform_or_app_classes() const { return _has_platform_or_app_classes; } 271 size_t ptrmap_size_in_bits() const { return _ptrmap_size_in_bits; } 272 bool compressed_oops() const { return _compressed_oops; } 273 bool compressed_class_pointers() const { return _compressed_class_ptrs; } 274 // FIXME: These should really return int 275 jshort max_used_path_index() const { return _max_used_path_index; } 276 jshort app_module_paths_start_index() const { return _app_module_paths_start_index; } 277 jshort app_class_paths_start_index() const { return _app_class_paths_start_index; } 278 jshort num_module_paths() const { return _num_module_paths; } 279 280 void set_has_platform_or_app_classes(bool v) { _has_platform_or_app_classes = v; } 281 void set_cloned_vtables(char* p) { set_mapped_offset(p, &_cloned_vtables_offset); } 282 void set_serialized_data(char* p) { set_mapped_offset(p, &_serialized_data_offset); } 283 void set_base_archive_name_size(size_t s) { _base_archive_name_size = s; } 284 void set_base_archive_is_default(bool b) { _base_archive_is_default = b; } 285 void set_header_size(size_t s) { _header_size = s; } 286 void set_ptrmap_size_in_bits(size_t s) { _ptrmap_size_in_bits = s; } 287 void set_mapped_base_address(char* p) { _mapped_base_address = p; } 288 void set_i2i_entry_code_buffers(address p, size_t s) { 289 set_mapped_offset((char*)p, &_i2i_entry_code_buffers_offset); 290 _i2i_entry_code_buffers_size = s; 291 } 292 293 void set_shared_path_table(SharedPathTable table) { 294 set_mapped_offset((char*)table.table(), &_shared_path_table_offset); 295 _shared_path_table_size = table.size(); 296 } 297 298 void set_final_requested_base(char* b) { 299 _requested_base_address = b; 300 _mapped_base_address = 0; 301 } 302 303 SharedPathTable shared_path_table() const { 304 return SharedPathTable((Array<u8>*)from_mapped_offset(_shared_path_table_offset), 305 _shared_path_table_size); 306 } 307 308 bool validate(); 309 int compute_crc(); 310 311 FileMapRegion* space_at(int i) { 312 assert(is_valid_region(i), "invalid region"); 313 return FileMapRegion::cast(&_space[i]); 314 } 315 316 void populate(FileMapInfo* info, size_t alignment); 317 318 static bool is_valid_region(int region) { 319 return (0 <= region && region < NUM_CDS_REGIONS); 320 } 321 }; 322 323 class FileMapInfo : public CHeapObj<mtInternal> { 324 private: 325 friend class ManifestStream; 326 friend class VMStructs; 327 friend class CDSOffsets; 328 friend class FileMapHeader; 329 330 bool _is_static; 331 bool _file_open; 332 bool _is_mapped; 333 int _fd; 334 size_t _file_offset; 335 const char* _full_path; 336 const char* _base_archive_name; 337 FileMapHeader* _header; 338 339 // TODO: Probably change the following to be non-static 340 static SharedPathTable _shared_path_table; 341 static SharedPathTable _saved_shared_path_table; 342 static bool _validating_shared_path_table; 343 344 // FileMapHeader describes the shared space data in the file to be 345 // mapped. This structure gets written to a file. It is not a class, so 346 // that the compilers don't add any compiler-private data to it. 347 348 static FileMapInfo* _current_info; 349 static FileMapInfo* _dynamic_archive_info; 350 static bool _heap_pointers_need_patching; 351 static bool _memory_mapping_failed; 352 static GrowableArray<const char*>* _non_existent_class_paths; 353 354 FileMapHeader *header() const { return _header; } 355 356 public: 357 static bool get_base_archive_name_from_header(const char* archive_name, 358 int* size, char** base_archive_name); 359 static bool check_archive(const char* archive_name, bool is_static); 360 static SharedPathTable shared_path_table() { 361 return _shared_path_table; 362 } 363 static SharedPathTable saved_shared_path_table() { 364 return _saved_shared_path_table; 365 } 366 367 bool init_from_file(int fd); 368 static void metaspace_pointers_do(MetaspaceClosure* it, bool use_copy = true); 369 370 void log_paths(const char* msg, int start_idx, int end_idx); 371 372 FileMapInfo(bool is_static); 373 ~FileMapInfo(); 374 375 // Accessors 376 int compute_header_crc() const { return header()->compute_crc(); } 377 void set_header_crc(int crc) { header()->set_crc(crc); } 378 int space_crc(int i) const { return space_at(i)->crc(); } 379 void populate_header(size_t alignment); 380 bool validate_header(); 381 void invalidate(); 382 int crc() const { return header()->crc(); } 383 int version() const { return header()->version(); } 384 size_t alignment() const { return header()->alignment(); } 385 address narrow_oop_base() const { return header()->narrow_oop_base(); } 386 int narrow_oop_shift() const { return header()->narrow_oop_shift(); } 387 uintx max_heap_size() const { return header()->max_heap_size(); } 388 address narrow_klass_base() const { return header()->narrow_klass_base(); } 389 int narrow_klass_shift() const { return header()->narrow_klass_shift(); } 390 391 CompressedOops::Mode narrow_oop_mode() const { return header()->narrow_oop_mode(); } 392 jshort app_module_paths_start_index() const { return header()->app_module_paths_start_index(); } 393 jshort app_class_paths_start_index() const { return header()->app_class_paths_start_index(); } 394 395 char* cloned_vtables() const { return header()->cloned_vtables(); } 396 void set_cloned_vtables(char* p) const { header()->set_cloned_vtables(p); } 397 char* serialized_data() const { return header()->serialized_data(); } 398 void set_serialized_data(char* p) const { header()->set_serialized_data(p); } 399 400 bool is_file_position_aligned() const; 401 void align_file_position(); 402 403 address i2i_entry_code_buffers() const { return header()->i2i_entry_code_buffers(); } 404 size_t i2i_entry_code_buffers_size() const { return header()->i2i_entry_code_buffers_size(); } 405 void set_i2i_entry_code_buffers(address addr, size_t s) const { 406 header()->set_i2i_entry_code_buffers(addr, s); 407 } 408 409 bool is_static() const { return _is_static; } 410 bool is_mapped() const { return _is_mapped; } 411 void set_is_mapped(bool v) { _is_mapped = v; } 412 const char* full_path() const { return _full_path; } 413 void set_final_requested_base(char* b); 414 415 char* requested_base_address() const { return header()->requested_base_address(); } 416 417 418 class DynamicArchiveHeader* dynamic_header() const { 419 assert(!is_static(), "must be"); 420 return (DynamicArchiveHeader*)header(); 421 } 422 423 void set_has_platform_or_app_classes(bool v) { 424 header()->set_has_platform_or_app_classes(v); 425 } 426 bool has_platform_or_app_classes() const { 427 return header()->has_platform_or_app_classes(); 428 } 429 430 static FileMapInfo* current_info() { 431 CDS_ONLY(return _current_info;) 432 NOT_CDS(return NULL;) 433 } 434 435 static void set_current_info(FileMapInfo* info) { 436 CDS_ONLY(_current_info = info;) 437 } 438 439 static FileMapInfo* dynamic_info() { 440 CDS_ONLY(return _dynamic_archive_info;) 441 NOT_CDS(return NULL;) 442 } 443 444 static void assert_mark(bool check); 445 446 // File manipulation. 447 bool initialize() NOT_CDS_RETURN_(false); 448 bool open_for_read(); 449 void open_for_write(const char* path = NULL); 450 void write_header(); 451 void write_region(int region, char* base, size_t size, 452 bool read_only, bool allow_exec); 453 void write_bitmap_region(const CHeapBitMap* ptrmap, 454 GrowableArray<ArchiveHeapOopmapInfo>* closed_oopmaps, 455 GrowableArray<ArchiveHeapOopmapInfo>* open_oopmaps); 456 size_t write_archive_heap_regions(GrowableArray<MemRegion> *heap_mem, 457 GrowableArray<ArchiveHeapOopmapInfo> *oopmaps, 458 int first_region_id, int max_num_regions); 459 void write_bytes(const void* buffer, size_t count); 460 void write_bytes_aligned(const void* buffer, size_t count); 461 size_t read_bytes(void* buffer, size_t count); 462 MapArchiveResult map_regions(int regions[], int num_regions, char* mapped_base_address, ReservedSpace rs); 463 void unmap_regions(int regions[], int num_regions); 464 void map_heap_regions() NOT_CDS_JAVA_HEAP_RETURN; 465 void fixup_mapped_heap_regions() NOT_CDS_JAVA_HEAP_RETURN; 466 void patch_archived_heap_embedded_pointers() NOT_CDS_JAVA_HEAP_RETURN; 467 void patch_archived_heap_embedded_pointers(MemRegion* ranges, int num_ranges, 468 int first_region_idx) NOT_CDS_JAVA_HEAP_RETURN; 469 bool has_heap_regions() NOT_CDS_JAVA_HEAP_RETURN_(false); 470 MemRegion get_heap_regions_range_with_current_oop_encoding_mode() NOT_CDS_JAVA_HEAP_RETURN_(MemRegion()); 471 void unmap_region(int i); 472 bool verify_region_checksum(int i); 473 void close(); 474 bool is_open() { return _file_open; } 475 ReservedSpace reserve_shared_memory(); 476 477 // JVM/TI RedefineClasses() support: 478 // Remap the shared readonly space to shared readwrite, private. 479 bool remap_shared_readonly_as_readwrite(); 480 481 // Errors. 482 static void fail_stop(const char *msg, ...) ATTRIBUTE_PRINTF(1, 2); 483 static void fail_continue(const char *msg, ...) ATTRIBUTE_PRINTF(1, 2); 484 static bool memory_mapping_failed() { 485 CDS_ONLY(return _memory_mapping_failed;) 486 NOT_CDS(return false;) 487 } 488 bool is_in_shared_region(const void* p, int idx) NOT_CDS_RETURN_(false); 489 490 // Stop CDS sharing and unmap CDS regions. 491 static void stop_sharing_and_unmap(const char* msg); 492 493 static void allocate_shared_path_table(); 494 static void copy_shared_path_table(ClassLoaderData* loader_data, Thread* THREAD); 495 static int add_shared_classpaths(int i, const char* which, ClassPathEntry *cpe, TRAPS); 496 static void check_nonempty_dir_in_shared_path_table(); 497 bool validate_shared_path_table(); 498 void validate_non_existent_class_paths(); 499 static void set_shared_path_table(FileMapInfo* info) { 500 _shared_path_table = info->header()->shared_path_table(); 501 } 502 static void update_jar_manifest(ClassPathEntry *cpe, SharedClassPathEntry* ent, TRAPS); 503 static int num_non_existent_class_paths(); 504 static void record_non_existent_class_path_entry(const char* path); 505 506 #if INCLUDE_JVMTI 507 static ClassFileStream* open_stream_for_jvmti(InstanceKlass* ik, Handle class_loader, TRAPS); 508 #endif 509 510 static SharedClassPathEntry* shared_path(int index) { 511 return _shared_path_table.path_at(index); 512 } 513 514 static const char* shared_path_name(int index) { 515 assert(index >= 0, "Sanity"); 516 return shared_path(index)->name(); 517 } 518 519 static int get_number_of_shared_paths() { 520 return _shared_path_table.size(); 521 } 522 523 char* region_addr(int idx); 524 525 // The offset of the first core region in the archive, relative to SharedBaseAddress 526 size_t mapping_base_offset() const { return first_core_space()->mapping_offset(); } 527 // The offset of the (exclusive) end of the last core region in this archive, relative to SharedBaseAddress 528 size_t mapping_end_offset() const { return last_core_space()->mapping_end_offset(); } 529 530 char* mapped_base() const { return first_core_space()->mapped_base(); } 531 char* mapped_end() const { return last_core_space()->mapped_end(); } 532 533 // Non-zero if the archive needs to be mapped a non-default location due to ASLR. 534 intx relocation_delta() const { 535 return header()->mapped_base_address() - header()->requested_base_address(); 536 } 537 538 FileMapRegion* first_core_space() const; 539 FileMapRegion* last_core_space() const; 540 541 FileMapRegion* space_at(int i) const { 542 return header()->space_at(i); 543 } 544 545 private: 546 void seek_to_position(size_t pos); 547 char* skip_first_path_entry(const char* path) NOT_CDS_RETURN_(NULL); 548 int num_paths(const char* path) NOT_CDS_RETURN_(0); 549 GrowableArray<const char*>* create_path_array(const char* path) NOT_CDS_RETURN_(NULL); 550 bool classpath_failure(const char* msg, const char* name) NOT_CDS_RETURN_(false); 551 bool check_paths(int shared_path_start_idx, int num_paths, 552 GrowableArray<const char*>* rp_array) NOT_CDS_RETURN_(false); 553 bool validate_boot_class_paths() NOT_CDS_RETURN_(false); 554 bool validate_app_class_paths(int shared_app_paths_len) NOT_CDS_RETURN_(false); 555 bool map_heap_data(MemRegion **heap_mem, int first, int max, int* num, 556 bool is_open = false) NOT_CDS_JAVA_HEAP_RETURN_(false); 557 bool region_crc_check(char* buf, size_t size, int expected_crc) NOT_CDS_RETURN_(false); 558 void dealloc_archive_heap_regions(MemRegion* regions, int num) NOT_CDS_JAVA_HEAP_RETURN; 559 void map_heap_regions_impl() NOT_CDS_JAVA_HEAP_RETURN; 560 char* map_bitmap_region(); 561 MapArchiveResult map_region(int i, intx addr_delta, char* mapped_base_address, ReservedSpace rs); 562 bool read_region(int i, char* base, size_t size); 563 bool relocate_pointers(intx addr_delta); 564 static size_t set_oopmaps_offset(GrowableArray<ArchiveHeapOopmapInfo> *oopmaps, size_t curr_size); 565 static size_t write_oopmaps(GrowableArray<ArchiveHeapOopmapInfo> *oopmaps, size_t curr_offset, uintptr_t* buffer); 566 567 // The starting address of spc, as calculated with CompressedOop::decode_non_null() 568 address start_address_as_decoded_with_current_oop_encoding_mode(FileMapRegion* spc) { 569 return decode_start_address(spc, true); 570 } 571 572 // The starting address of spc, as calculated with HeapShared::decode_from_archive() 573 address start_address_as_decoded_from_archive(FileMapRegion* spc) { 574 return decode_start_address(spc, false); 575 } 576 577 address decode_start_address(FileMapRegion* spc, bool with_current_oop_encoding_mode); 578 579 #if INCLUDE_JVMTI 580 static ClassPathEntry** _classpath_entries_for_jvmti; 581 static ClassPathEntry* get_classpath_entry_for_jvmti(int i, TRAPS); 582 #endif 583 }; 584 585 #endif // SHARE_MEMORY_FILEMAP_HPP