1 /* 2 * Copyright (c) 2003, 2021, 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_CDS_FILEMAP_HPP 26 #define SHARE_CDS_FILEMAP_HPP 27 28 #include "cds/metaspaceShared.hpp" 29 #include "include/cds.h" 30 #include "oops/array.hpp" 31 #include "oops/compressedOops.hpp" 32 #include "runtime/globals.hpp" 33 #include "utilities/align.hpp" 34 35 // To understand the layout of the CDS archive file: 36 // 37 // java -Xlog:cds+map=info:file=cds.map:none:filesize=0 38 // java -Xlog:cds+map=debug:file=cds.map:none:filesize=0 39 // java -Xlog:cds+map=trace:file=cds.map:none:filesize=0 40 41 static const int JVM_IDENT_MAX = 256; 42 43 class CHeapBitMap; 44 class ClassFileStream; 45 class ClassLoaderData; 46 class ClassPathEntry; 47 class outputStream; 48 49 class SharedClassPathEntry { 50 enum { 51 modules_image_entry, 52 jar_entry, 53 signed_jar_entry, 54 dir_entry, 55 non_existent_entry, 56 unknown_entry 57 }; 58 59 void set_name(const char* name, TRAPS); 60 61 u1 _type; 62 bool _is_module_path; 63 bool _from_class_path_attr; 64 time_t _timestamp; // jar timestamp, 0 if is directory, modules image or other 65 int64_t _filesize; // jar/jimage file size, -1 if is directory, -2 if other 66 Array<char>* _name; 67 Array<u1>* _manifest; 68 69 public: 70 void init(bool is_modules_image, bool is_module_path, ClassPathEntry* cpe, TRAPS); 71 void init_as_non_existent(const char* path, TRAPS); 72 void metaspace_pointers_do(MetaspaceClosure* it); 73 bool validate(bool is_class_path = true) const; 74 75 // The _timestamp only gets set for jar files. 76 bool has_timestamp() const { 77 return _timestamp != 0; 78 } 79 bool is_dir() const { return _type == dir_entry; } 80 bool is_modules_image() const { return _type == modules_image_entry; } 81 bool is_jar() const { return _type == jar_entry; } 82 bool is_signed() const { return _type == signed_jar_entry; } 83 void set_is_signed() { 84 _type = signed_jar_entry; 85 } 86 bool from_class_path_attr() { return _from_class_path_attr; } 87 time_t timestamp() const { return _timestamp; } 88 const char* name() const; 89 const char* manifest() const { 90 return (_manifest == NULL) ? NULL : (const char*)_manifest->data(); 91 } 92 int manifest_size() const { 93 return (_manifest == NULL) ? 0 : _manifest->length(); 94 } 95 void set_manifest(Array<u1>* manifest) { 96 _manifest = manifest; 97 } 98 bool check_non_existent() const; 99 void copy_from(SharedClassPathEntry* ent, ClassLoaderData* loader_data, TRAPS); 100 bool in_named_module() { 101 return is_modules_image() || // modules image doesn't contain unnamed modules 102 _is_module_path; // module path doesn't contain unnamed modules 103 } 104 }; 105 106 struct ArchiveHeapOopmapInfo { 107 address _oopmap; // bitmap for relocating embedded oops 108 size_t _offset; // this oopmap is stored at this offset from the bottom of the BM region 109 size_t _oopmap_size_in_bits; 110 size_t _oopmap_size_in_bytes; 111 }; 112 113 class SharedPathTable { 114 Array<u8>* _table; 115 int _size; 116 public: 117 SharedPathTable() : _table(NULL), _size(0) {} 118 SharedPathTable(Array<u8>* table, int size) : _table(table), _size(size) {} 119 120 void dumptime_init(ClassLoaderData* loader_data, TRAPS); 121 void metaspace_pointers_do(MetaspaceClosure* it); 122 123 int size() { 124 return _size; 125 } 126 SharedClassPathEntry* path_at(int index) { 127 if (index < 0) { 128 return NULL; 129 } 130 assert(index < _size, "sanity"); 131 char* p = (char*)_table->data(); 132 p += sizeof(SharedClassPathEntry) * index; 133 return (SharedClassPathEntry*)p; 134 } 135 Array<u8>* table() {return _table;} 136 void set_table(Array<u8>* table) {_table = table;} 137 }; 138 139 140 class FileMapRegion: private CDSFileMapRegion { 141 public: 142 void assert_is_heap_region() const { 143 assert(_is_heap_region, "must be heap region"); 144 } 145 void assert_is_not_heap_region() const { 146 assert(!_is_heap_region, "must not be heap region"); 147 } 148 149 static FileMapRegion* cast(CDSFileMapRegion* p) { 150 return (FileMapRegion*)p; 151 } 152 153 // Accessors 154 int crc() const { return _crc; } 155 size_t file_offset() const { return _file_offset; } 156 size_t mapping_offset() const { return _mapping_offset; } 157 size_t mapping_end_offset() const { return _mapping_offset + used_aligned(); } 158 size_t used() const { return _used; } 159 size_t used_aligned() const; // aligned up to MetaspaceShared::core_region_alignment() 160 char* mapped_base() const { assert_is_not_heap_region(); return _mapped_base; } 161 char* mapped_end() const { return mapped_base() + used_aligned(); } 162 bool read_only() const { return _read_only != 0; } 163 bool allow_exec() const { return _allow_exec != 0; } 164 bool mapped_from_file() const { return _mapped_from_file != 0; } 165 size_t oopmap_offset() const { assert_is_heap_region(); return _oopmap_offset; } 166 size_t oopmap_size_in_bits() const { assert_is_heap_region(); return _oopmap_size_in_bits; } 167 168 void set_file_offset(size_t s) { _file_offset = s; } 169 void set_read_only(bool v) { _read_only = v; } 170 void set_mapped_base(char* p) { _mapped_base = p; } 171 void set_mapped_from_file(bool v) { _mapped_from_file = v; } 172 void init(int region_index, size_t mapping_offset, size_t size, bool read_only, 173 bool allow_exec, int crc); 174 175 void init_oopmap(size_t oopmap_offset, size_t size_in_bits) { 176 _oopmap_offset = oopmap_offset; 177 _oopmap_size_in_bits = size_in_bits; 178 } 179 180 void print(outputStream* st, int region_index); 181 }; 182 183 #define CDS_MUST_MATCH_FLAGS_DO(f) \ 184 f(EnableValhalla) \ 185 f(FlatArrayElementMaxOops) \ 186 f(FlatArrayElementMaxSize) \ 187 f(InlineFieldMaxFlatSize) \ 188 f(InlineTypePassFieldsAsArgs) \ 189 f(InlineTypeReturnedAsFields) 190 191 class CDSMustMatchFlags { 192 private: 193 size_t _max_name_width; 194 #define DECLARE_CDS_MUST_MATCH_FLAG(n) \ 195 decltype(n) _v_##n; 196 CDS_MUST_MATCH_FLAGS_DO(DECLARE_CDS_MUST_MATCH_FLAG); 197 #undef DECLARE_CDS_MUST_MATCH_FLAG 198 199 inline static void do_print(outputStream* st, bool v); 200 inline static void do_print(outputStream* st, intx v); 201 inline static void do_print(outputStream* st, uintx v); 202 inline static void do_print(outputStream* st, double v); 203 void print_info() const; 204 205 public: 206 void init(); 207 bool runtime_check() const; 208 void print(outputStream* st) const; 209 }; 210 211 class FileMapHeader: private CDSFileMapHeaderBase { 212 friend class CDSConstants; 213 friend class VMStructs; 214 215 private: 216 size_t _header_size; 217 218 // The following fields record the states of the VM during dump time. 219 // They are compared with the runtime states to see if the archive 220 // can be used. 221 size_t _core_region_alignment; // how shared archive should be aligned 222 int _obj_alignment; // value of ObjectAlignmentInBytes 223 address _narrow_oop_base; // compressed oop encoding base 224 int _narrow_oop_shift; // compressed oop encoding shift 225 bool _compact_strings; // value of CompactStrings 226 uintx _max_heap_size; // java max heap size during dumping 227 CompressedOops::Mode _narrow_oop_mode; // compressed oop encoding mode 228 int _narrow_klass_shift; // save narrow klass base and shift 229 bool _compressed_oops; // save the flag UseCompressedOops 230 bool _compressed_class_ptrs; // save the flag UseCompressedClassPointers 231 size_t _cloned_vtables_offset; // The address of the first cloned vtable 232 size_t _serialized_data_offset; // Data accessed using {ReadClosure,WriteClosure}::serialize() 233 address _heap_begin; // heap begin at dump time. 234 address _heap_end; // heap end at dump time. 235 bool _base_archive_is_default; // indicates if the base archive is the system default one 236 bool _has_non_jar_in_classpath; // non-jar file entry exists in classpath 237 238 // The following fields are all sanity checks for whether this archive 239 // will function correctly with this JVM and the bootclasspath it's 240 // invoked with. 241 char _jvm_ident[JVM_IDENT_MAX]; // identifier string of the jvm that created this dump 242 // size of the base archive name including NULL terminator 243 size_t _base_archive_name_size; 244 245 // The following is a table of all the boot/app/module path entries that were used 246 // during dumping. At run time, we validate these entries according to their 247 // SharedClassPathEntry::_type. See: 248 // check_nonempty_dir_in_shared_path_table() 249 // validate_shared_path_table() 250 // validate_non_existent_class_paths() 251 size_t _shared_path_table_offset; 252 int _shared_path_table_size; 253 254 jshort _app_class_paths_start_index; // Index of first app classpath entry 255 jshort _app_module_paths_start_index; // Index of first module path entry 256 jshort _num_module_paths; // number of module path entries 257 jshort _max_used_path_index; // max path index referenced during CDS dump 258 bool _verify_local; // BytecodeVerificationLocal setting 259 bool _verify_remote; // BytecodeVerificationRemote setting 260 bool _has_platform_or_app_classes; // Archive contains app classes 261 char* _requested_base_address; // Archive relocation is not necessary if we map with this base address. 262 char* _mapped_base_address; // Actual base address where archive is mapped. 263 264 bool _allow_archiving_with_java_agent; // setting of the AllowArchivingWithJavaAgent option 265 bool _use_optimized_module_handling;// No module-relation VM options were specified, so we can skip 266 // some expensive operations. 267 bool _use_full_module_graph; // Can we use the full archived module graph? 268 size_t _ptrmap_size_in_bits; // Size of pointer relocation bitmap 269 narrowOop _heap_obj_roots; // An objArray that stores all the roots of archived heap objects 270 CDSMustMatchFlags _must_match; // These flags must be the same between dumptime and runtime 271 char* from_mapped_offset(size_t offset) const { 272 return mapped_base_address() + offset; 273 } 274 void set_as_offset(char* p, size_t *offset); 275 public: 276 // Accessors -- fields declared in CDSFileMapHeaderBase 277 unsigned int magic() const { return _magic; } 278 int crc() const { return _crc; } 279 int version() const { return _version; } 280 281 void set_crc(int crc_value) { _crc = crc_value; } 282 void set_version(int v) { _version = v; } 283 284 // Accessors -- fields declared in FileMapHeader 285 286 size_t header_size() const { return _header_size; } 287 size_t core_region_alignment() const { return _core_region_alignment; } 288 int obj_alignment() const { return _obj_alignment; } 289 address narrow_oop_base() const { return _narrow_oop_base; } 290 int narrow_oop_shift() const { return _narrow_oop_shift; } 291 bool compact_strings() const { return _compact_strings; } 292 uintx max_heap_size() const { return _max_heap_size; } 293 CompressedOops::Mode narrow_oop_mode() const { return _narrow_oop_mode; } 294 int narrow_klass_shift() const { return _narrow_klass_shift; } 295 address narrow_klass_base() const { return (address)mapped_base_address(); } 296 char* cloned_vtables() const { return from_mapped_offset(_cloned_vtables_offset); } 297 char* serialized_data() const { return from_mapped_offset(_serialized_data_offset); } 298 address heap_begin() const { return _heap_begin; } 299 address heap_end() const { return _heap_end; } 300 bool base_archive_is_default() const { return _base_archive_is_default; } 301 const char* jvm_ident() const { return _jvm_ident; } 302 size_t base_archive_name_size() const { return _base_archive_name_size; } 303 char* requested_base_address() const { return _requested_base_address; } 304 char* mapped_base_address() const { return _mapped_base_address; } 305 bool has_platform_or_app_classes() const { return _has_platform_or_app_classes; } 306 bool has_non_jar_in_classpath() const { return _has_non_jar_in_classpath; } 307 size_t ptrmap_size_in_bits() const { return _ptrmap_size_in_bits; } 308 bool compressed_oops() const { return _compressed_oops; } 309 bool compressed_class_pointers() const { return _compressed_class_ptrs; } 310 // FIXME: These should really return int 311 jshort max_used_path_index() const { return _max_used_path_index; } 312 jshort app_module_paths_start_index() const { return _app_module_paths_start_index; } 313 jshort app_class_paths_start_index() const { return _app_class_paths_start_index; } 314 jshort num_module_paths() const { return _num_module_paths; } 315 narrowOop heap_obj_roots() const { return _heap_obj_roots; } 316 317 void set_has_platform_or_app_classes(bool v) { _has_platform_or_app_classes = v; } 318 void set_cloned_vtables(char* p) { set_as_offset(p, &_cloned_vtables_offset); } 319 void set_serialized_data(char* p) { set_as_offset(p, &_serialized_data_offset); } 320 void set_base_archive_name_size(size_t s) { _base_archive_name_size = s; } 321 void set_base_archive_is_default(bool b) { _base_archive_is_default = b; } 322 void set_header_size(size_t s) { _header_size = s; } 323 void set_ptrmap_size_in_bits(size_t s) { _ptrmap_size_in_bits = s; } 324 void set_mapped_base_address(char* p) { _mapped_base_address = p; } 325 void set_heap_obj_roots(narrowOop r) { _heap_obj_roots = r; } 326 327 void set_shared_path_table(SharedPathTable table) { 328 set_as_offset((char*)table.table(), &_shared_path_table_offset); 329 _shared_path_table_size = table.size(); 330 } 331 332 void set_requested_base(char* b) { 333 _requested_base_address = b; 334 _mapped_base_address = 0; 335 } 336 337 SharedPathTable shared_path_table() const { 338 return SharedPathTable((Array<u8>*)from_mapped_offset(_shared_path_table_offset), 339 _shared_path_table_size); 340 } 341 342 bool validate(); 343 int compute_crc(); 344 345 FileMapRegion* space_at(int i) { 346 assert(is_valid_region(i), "invalid region"); 347 return FileMapRegion::cast(&_space[i]); 348 } 349 350 void populate(FileMapInfo* info, size_t core_region_alignment); 351 352 static bool is_valid_region(int region) { 353 return (0 <= region && region < NUM_CDS_REGIONS); 354 } 355 356 bool check_must_match_flags() const { 357 return _must_match.runtime_check(); 358 } 359 360 void print(outputStream* st); 361 }; 362 363 class FileMapInfo : public CHeapObj<mtInternal> { 364 private: 365 friend class ManifestStream; 366 friend class VMStructs; 367 friend class ArchiveBuilder; 368 friend class CDSOffsets; 369 friend class FileMapHeader; 370 371 bool _is_static; 372 bool _file_open; 373 bool _is_mapped; 374 int _fd; 375 size_t _file_offset; 376 const char* _full_path; 377 const char* _base_archive_name; 378 FileMapHeader* _header; 379 380 // TODO: Probably change the following to be non-static 381 static SharedPathTable _shared_path_table; 382 static SharedPathTable _saved_shared_path_table; 383 static Array<u8>* _saved_shared_path_table_array; // remember the table array for cleanup 384 static bool _validating_shared_path_table; 385 386 // FileMapHeader describes the shared space data in the file to be 387 // mapped. This structure gets written to a file. It is not a class, so 388 // that the compilers don't add any compiler-private data to it. 389 390 static FileMapInfo* _current_info; 391 static FileMapInfo* _dynamic_archive_info; 392 static bool _heap_pointers_need_patching; 393 static bool _memory_mapping_failed; 394 static GrowableArray<const char*>* _non_existent_class_paths; 395 396 FileMapHeader *header() const { return _header; } 397 398 public: 399 static bool get_base_archive_name_from_header(const char* archive_name, 400 int* size, char** base_archive_name); 401 static bool check_archive(const char* archive_name, bool is_static); 402 static SharedPathTable shared_path_table() { 403 return _shared_path_table; 404 } 405 static SharedPathTable saved_shared_path_table() { 406 assert(_saved_shared_path_table.size() >= 0, "Sanity check"); 407 return _saved_shared_path_table; 408 } 409 410 bool init_from_file(int fd); 411 static void metaspace_pointers_do(MetaspaceClosure* it, bool use_copy = true); 412 413 void log_paths(const char* msg, int start_idx, int end_idx); 414 415 FileMapInfo(bool is_static); 416 ~FileMapInfo(); 417 418 // Accessors 419 int compute_header_crc() const { return header()->compute_crc(); } 420 void set_header_crc(int crc) { header()->set_crc(crc); } 421 int space_crc(int i) const { return space_at(i)->crc(); } 422 void populate_header(size_t core_region_alignment); 423 bool validate_header(); 424 void invalidate(); 425 int crc() const { return header()->crc(); } 426 int version() const { return header()->version(); } 427 unsigned int magic() const { return header()->magic(); } 428 address narrow_oop_base() const { return header()->narrow_oop_base(); } 429 int narrow_oop_shift() const { return header()->narrow_oop_shift(); } 430 uintx max_heap_size() const { return header()->max_heap_size(); } 431 address narrow_klass_base() const { return header()->narrow_klass_base(); } 432 int narrow_klass_shift() const { return header()->narrow_klass_shift(); } 433 size_t core_region_alignment() const { return header()->core_region_alignment(); } 434 435 void set_header_base_archive_name_size(size_t size) { header()->set_base_archive_name_size(size); } 436 void set_header_base_archive_is_default(bool is_default) { header()->set_base_archive_is_default(is_default); } 437 438 CompressedOops::Mode narrow_oop_mode() const { return header()->narrow_oop_mode(); } 439 jshort app_module_paths_start_index() const { return header()->app_module_paths_start_index(); } 440 jshort app_class_paths_start_index() const { return header()->app_class_paths_start_index(); } 441 442 char* cloned_vtables() const { return header()->cloned_vtables(); } 443 void set_cloned_vtables(char* p) const { header()->set_cloned_vtables(p); } 444 char* serialized_data() const { return header()->serialized_data(); } 445 void set_serialized_data(char* p) const { header()->set_serialized_data(p); } 446 447 bool is_file_position_aligned() const; 448 void align_file_position(); 449 450 bool is_static() const { return _is_static; } 451 bool is_mapped() const { return _is_mapped; } 452 void set_is_mapped(bool v) { _is_mapped = v; } 453 const char* full_path() const { return _full_path; } 454 455 void set_requested_base(char* b) { header()->set_requested_base(b); } 456 char* requested_base_address() const { return header()->requested_base_address(); } 457 458 narrowOop heap_obj_roots() const { return header()->heap_obj_roots(); } 459 460 class DynamicArchiveHeader* dynamic_header() const { 461 assert(!is_static(), "must be"); 462 return (DynamicArchiveHeader*)header(); 463 } 464 465 void set_has_platform_or_app_classes(bool v) { 466 header()->set_has_platform_or_app_classes(v); 467 } 468 bool has_platform_or_app_classes() const { 469 return header()->has_platform_or_app_classes(); 470 } 471 472 static FileMapInfo* current_info() { 473 CDS_ONLY(return _current_info;) 474 NOT_CDS(return NULL;) 475 } 476 477 static void set_current_info(FileMapInfo* info) { 478 CDS_ONLY(_current_info = info;) 479 } 480 481 static FileMapInfo* dynamic_info() { 482 CDS_ONLY(return _dynamic_archive_info;) 483 NOT_CDS(return NULL;) 484 } 485 486 static void assert_mark(bool check); 487 488 // File manipulation. 489 bool initialize() NOT_CDS_RETURN_(false); 490 bool open_for_read(); 491 void open_for_write(const char* path = NULL); 492 void write_header(); 493 void write_region(int region, char* base, size_t size, 494 bool read_only, bool allow_exec); 495 char* write_bitmap_region(const CHeapBitMap* ptrmap, 496 GrowableArray<ArchiveHeapOopmapInfo>* closed_oopmaps, 497 GrowableArray<ArchiveHeapOopmapInfo>* open_oopmaps, 498 size_t &size_in_bytes); 499 size_t write_heap_regions(GrowableArray<MemRegion>* regions, 500 GrowableArray<ArchiveHeapOopmapInfo>* oopmaps, 501 int first_region_id, int max_num_regions); 502 void write_bytes(const void* buffer, size_t count); 503 void write_bytes_aligned(const void* buffer, size_t count); 504 size_t read_bytes(void* buffer, size_t count); 505 MapArchiveResult map_regions(int regions[], int num_regions, char* mapped_base_address, ReservedSpace rs); 506 void unmap_regions(int regions[], int num_regions); 507 void map_or_load_heap_regions() NOT_CDS_JAVA_HEAP_RETURN; 508 void fixup_mapped_heap_regions() NOT_CDS_JAVA_HEAP_RETURN; 509 void patch_heap_embedded_pointers() NOT_CDS_JAVA_HEAP_RETURN; 510 void patch_heap_embedded_pointers(MemRegion* regions, int num_regions, 511 int first_region_idx) NOT_CDS_JAVA_HEAP_RETURN; 512 bool has_heap_regions() NOT_CDS_JAVA_HEAP_RETURN_(false); 513 MemRegion get_heap_regions_range_with_current_oop_encoding_mode() NOT_CDS_JAVA_HEAP_RETURN_(MemRegion()); 514 bool read_region(int i, char* base, size_t size, bool do_commit); 515 char* map_bitmap_region(); 516 void unmap_region(int i); 517 bool verify_region_checksum(int i); 518 void close(); 519 bool is_open() { return _file_open; } 520 ReservedSpace reserve_shared_memory(); 521 522 // JVM/TI RedefineClasses() support: 523 // Remap the shared readonly space to shared readwrite, private. 524 bool remap_shared_readonly_as_readwrite(); 525 526 // Errors. 527 static void fail_stop(const char *msg, ...) ATTRIBUTE_PRINTF(1, 2); 528 static void fail_continue(const char *msg, ...) ATTRIBUTE_PRINTF(1, 2); 529 static bool memory_mapping_failed() { 530 CDS_ONLY(return _memory_mapping_failed;) 531 NOT_CDS(return false;) 532 } 533 bool is_in_shared_region(const void* p, int idx) NOT_CDS_RETURN_(false); 534 535 // Stop CDS sharing and unmap CDS regions. 536 static void stop_sharing_and_unmap(const char* msg); 537 538 static void allocate_shared_path_table(TRAPS); 539 static void copy_shared_path_table(ClassLoaderData* loader_data, TRAPS); 540 static void clone_shared_path_table(TRAPS); 541 static int add_shared_classpaths(int i, const char* which, ClassPathEntry *cpe, TRAPS); 542 static void check_nonempty_dir_in_shared_path_table(); 543 bool validate_shared_path_table(); 544 void validate_non_existent_class_paths(); 545 static void set_shared_path_table(FileMapInfo* info) { 546 _shared_path_table = info->header()->shared_path_table(); 547 } 548 static void update_jar_manifest(ClassPathEntry *cpe, SharedClassPathEntry* ent, TRAPS); 549 static int num_non_existent_class_paths(); 550 static void record_non_existent_class_path_entry(const char* path); 551 552 #if INCLUDE_JVMTI 553 static ClassFileStream* open_stream_for_jvmti(InstanceKlass* ik, Handle class_loader, TRAPS); 554 #endif 555 556 static SharedClassPathEntry* shared_path(int index) { 557 return _shared_path_table.path_at(index); 558 } 559 560 static const char* shared_path_name(int index) { 561 assert(index >= 0, "Sanity"); 562 return shared_path(index)->name(); 563 } 564 565 static int get_number_of_shared_paths() { 566 return _shared_path_table.size(); 567 } 568 569 static int get_module_shared_path_index(Symbol* location) NOT_CDS_RETURN_(-1); 570 571 char* region_addr(int idx); 572 573 // The offset of the first core region in the archive, relative to SharedBaseAddress 574 size_t mapping_base_offset() const { return first_core_space()->mapping_offset(); } 575 // The offset of the (exclusive) end of the last core region in this archive, relative to SharedBaseAddress 576 size_t mapping_end_offset() const { return last_core_space()->mapping_end_offset(); } 577 578 char* mapped_base() const { return first_core_space()->mapped_base(); } 579 char* mapped_end() const { return last_core_space()->mapped_end(); } 580 581 // Non-zero if the archive needs to be mapped a non-default location due to ASLR. 582 intx relocation_delta() const { 583 return header()->mapped_base_address() - header()->requested_base_address(); 584 } 585 586 FileMapRegion* first_core_space() const; 587 FileMapRegion* last_core_space() const; 588 589 FileMapRegion* space_at(int i) const { 590 return header()->space_at(i); 591 } 592 593 void print(outputStream* st) { 594 header()->print(st); 595 } 596 597 const char* vm_version() { 598 return header()->jvm_ident(); 599 } 600 601 private: 602 void seek_to_position(size_t pos); 603 char* skip_first_path_entry(const char* path) NOT_CDS_RETURN_(NULL); 604 int num_paths(const char* path) NOT_CDS_RETURN_(0); 605 GrowableArray<const char*>* create_path_array(const char* path) NOT_CDS_RETURN_(NULL); 606 bool classpath_failure(const char* msg, const char* name) NOT_CDS_RETURN_(false); 607 bool check_paths(int shared_path_start_idx, int num_paths, 608 GrowableArray<const char*>* rp_array) NOT_CDS_RETURN_(false); 609 bool validate_boot_class_paths() NOT_CDS_RETURN_(false); 610 bool validate_app_class_paths(int shared_app_paths_len) NOT_CDS_RETURN_(false); 611 bool map_heap_regions(int first, int max, bool is_open_archive, 612 MemRegion** regions_ret, int* num_regions_ret) NOT_CDS_JAVA_HEAP_RETURN_(false); 613 bool region_crc_check(char* buf, size_t size, int expected_crc) NOT_CDS_RETURN_(false); 614 void dealloc_heap_regions(MemRegion* regions, int num) NOT_CDS_JAVA_HEAP_RETURN; 615 bool can_use_heap_regions(); 616 bool load_heap_regions() NOT_CDS_JAVA_HEAP_RETURN_(false); 617 bool map_heap_regions() NOT_CDS_JAVA_HEAP_RETURN_(false); 618 void map_heap_regions_impl() NOT_CDS_JAVA_HEAP_RETURN; 619 MapArchiveResult map_region(int i, intx addr_delta, char* mapped_base_address, ReservedSpace rs); 620 bool relocate_pointers_in_core_regions(intx addr_delta); 621 static size_t set_oopmaps_offset(GrowableArray<ArchiveHeapOopmapInfo> *oopmaps, size_t curr_size); 622 static size_t write_oopmaps(GrowableArray<ArchiveHeapOopmapInfo> *oopmaps, size_t curr_offset, char* buffer); 623 624 address decode_start_address(FileMapRegion* spc, bool with_current_oop_encoding_mode); 625 626 // The starting address of spc, as calculated with CompressedOop::decode_non_null() 627 address start_address_as_decoded_with_current_oop_encoding_mode(FileMapRegion* spc) { 628 return decode_start_address(spc, true); 629 } 630 public: 631 // The starting address of spc, as calculated with HeapShared::decode_from_archive() 632 address start_address_as_decoded_from_archive(FileMapRegion* spc) { 633 return decode_start_address(spc, false); 634 } 635 636 private: 637 638 #if INCLUDE_JVMTI 639 static ClassPathEntry** _classpath_entries_for_jvmti; 640 static ClassPathEntry* get_classpath_entry_for_jvmti(int i, TRAPS); 641 #endif 642 }; 643 644 #endif // SHARE_CDS_FILEMAP_HPP --- EOF ---