208 // during dumping. At run time, we validate these entries according to their
209 // SharedClassPathEntry::_type. See:
210 // check_nonempty_dir_in_shared_path_table()
211 // validate_shared_path_table()
212 // validate_non_existent_class_paths()
213 size_t _shared_path_table_offset;
214
215 jshort _app_class_paths_start_index; // Index of first app classpath entry
216 jshort _app_module_paths_start_index; // Index of first module path entry
217 jshort _max_used_path_index; // max path index referenced during CDS dump
218 int _num_module_paths; // number of module path entries
219 bool _verify_local; // BytecodeVerificationLocal setting
220 bool _verify_remote; // BytecodeVerificationRemote setting
221 bool _has_platform_or_app_classes; // Archive contains app classes
222 char* _requested_base_address; // Archive relocation is not necessary if we map with this base address.
223 char* _mapped_base_address; // Actual base address where archive is mapped.
224
225 bool _allow_archiving_with_java_agent; // setting of the AllowArchivingWithJavaAgent option
226 bool _use_optimized_module_handling;// No module-relation VM options were specified, so we can skip
227 // some expensive operations.
228 bool _has_full_module_graph; // Does this CDS archive contain the full archived module graph?
229 HeapRootSegments _heap_root_segments; // Heap root segments info
230 size_t _heap_oopmap_start_pos; // The first bit in the oopmap corresponds to this position in the heap.
231 size_t _heap_ptrmap_start_pos; // The first bit in the ptrmap corresponds to this position in the heap.
232 size_t _rw_ptrmap_start_pos; // The first bit in the ptrmap corresponds to this position in the rw region
233 size_t _ro_ptrmap_start_pos; // The first bit in the ptrmap corresponds to this position in the ro region
234 char* from_mapped_offset(size_t offset) const {
235 return mapped_base_address() + offset;
236 }
237 void set_as_offset(char* p, size_t *offset);
238 public:
239 // Accessors -- fields declared in GenericCDSFileMapHeader
240 unsigned int magic() const { return _generic_header._magic; }
241 int crc() const { return _generic_header._crc; }
242 int version() const { return _generic_header._version; }
243 unsigned int header_size() const { return _generic_header._header_size; }
244 unsigned int base_archive_name_offset() const { return _generic_header._base_archive_name_offset; }
245 unsigned int base_archive_name_size() const { return _generic_header._base_archive_name_size; }
246 unsigned int common_app_classpath_prefix_size() const { return _common_app_classpath_prefix_size; }
247
248 void set_magic(unsigned int m) { _generic_header._magic = m; }
251 void set_header_size(unsigned int s) { _generic_header._header_size = s; }
252 void set_base_archive_name_offset(unsigned int s) { _generic_header._base_archive_name_offset = s; }
253 void set_base_archive_name_size(unsigned int s) { _generic_header._base_archive_name_size = s; }
254 void set_common_app_classpath_prefix_size(unsigned int s) { _common_app_classpath_prefix_size = s; }
255
256 bool is_static() const { return magic() == CDS_ARCHIVE_MAGIC; }
257 size_t core_region_alignment() const { return _core_region_alignment; }
258 int obj_alignment() const { return _obj_alignment; }
259 address narrow_oop_base() const { return _narrow_oop_base; }
260 int narrow_oop_shift() const { return _narrow_oop_shift; }
261 bool compact_strings() const { return _compact_strings; }
262 uintx max_heap_size() const { return _max_heap_size; }
263 CompressedOops::Mode narrow_oop_mode() const { return _narrow_oop_mode; }
264 char* cloned_vtables() const { return from_mapped_offset(_cloned_vtables_offset); }
265 char* serialized_data() const { return from_mapped_offset(_serialized_data_offset); }
266 const char* jvm_ident() const { return _jvm_ident; }
267 char* requested_base_address() const { return _requested_base_address; }
268 char* mapped_base_address() const { return _mapped_base_address; }
269 bool has_platform_or_app_classes() const { return _has_platform_or_app_classes; }
270 bool has_non_jar_in_classpath() const { return _has_non_jar_in_classpath; }
271 bool compressed_oops() const { return _compressed_oops; }
272 bool compressed_class_pointers() const { return _compressed_class_ptrs; }
273 HeapRootSegments heap_root_segments() const { return _heap_root_segments; }
274 bool has_full_module_graph() const { return _has_full_module_graph; }
275 size_t heap_oopmap_start_pos() const { return _heap_oopmap_start_pos; }
276 size_t heap_ptrmap_start_pos() const { return _heap_ptrmap_start_pos; }
277 size_t rw_ptrmap_start_pos() const { return _rw_ptrmap_start_pos; }
278 size_t ro_ptrmap_start_pos() const { return _ro_ptrmap_start_pos; }
279 // FIXME: These should really return int
280 jshort max_used_path_index() const { return _max_used_path_index; }
281 jshort app_module_paths_start_index() const { return _app_module_paths_start_index; }
282 jshort app_class_paths_start_index() const { return _app_class_paths_start_index; }
283 int num_module_paths() const { return _num_module_paths; }
284
285 void set_has_platform_or_app_classes(bool v) { _has_platform_or_app_classes = v; }
286 void set_cloned_vtables(char* p) { set_as_offset(p, &_cloned_vtables_offset); }
287 void set_serialized_data(char* p) { set_as_offset(p, &_serialized_data_offset); }
288 void set_mapped_base_address(char* p) { _mapped_base_address = p; }
289 void set_heap_root_segments(HeapRootSegments segments) { _heap_root_segments = segments; }
290 void set_heap_oopmap_start_pos(size_t n) { _heap_oopmap_start_pos = n; }
430
431 static void set_current_info(FileMapInfo* info) {
432 CDS_ONLY(_current_info = info;)
433 }
434
435 static FileMapInfo* dynamic_info() {
436 CDS_ONLY(return _dynamic_archive_info;)
437 NOT_CDS(return nullptr;)
438 }
439
440 static void assert_mark(bool check);
441
442 // File manipulation.
443 bool initialize() NOT_CDS_RETURN_(false);
444 bool open_for_read();
445 void open_for_write();
446 void write_header();
447 void write_region(int region, char* base, size_t size,
448 bool read_only, bool allow_exec);
449 size_t remove_bitmap_zeros(CHeapBitMap* map);
450 char* write_bitmap_region(CHeapBitMap* rw_ptrmap, CHeapBitMap* ro_ptrmap, ArchiveHeapInfo* heap_info,
451 size_t &size_in_bytes);
452 size_t write_heap_region(ArchiveHeapInfo* heap_info);
453 void write_bytes(const void* buffer, size_t count);
454 void write_bytes_aligned(const void* buffer, size_t count);
455 size_t read_bytes(void* buffer, size_t count);
456 static size_t readonly_total();
457 MapArchiveResult map_regions(int regions[], int num_regions, char* mapped_base_address, ReservedSpace rs);
458 void unmap_regions(int regions[], int num_regions);
459 void map_or_load_heap_region() NOT_CDS_JAVA_HEAP_RETURN;
460 void fixup_mapped_heap_region() NOT_CDS_JAVA_HEAP_RETURN;
461 void patch_heap_embedded_pointers() NOT_CDS_JAVA_HEAP_RETURN;
462 bool has_heap_region() NOT_CDS_JAVA_HEAP_RETURN_(false);
463 MemRegion get_heap_region_requested_range() NOT_CDS_JAVA_HEAP_RETURN_(MemRegion());
464 bool read_region(int i, char* base, size_t size, bool do_commit);
465 char* map_bitmap_region();
466 void unmap_region(int i);
467 void close();
468 bool is_open() { return _file_open; }
469 ReservedSpace reserve_shared_memory();
470
471 // JVM/TI RedefineClasses() support:
472 // Remap the shared readonly space to shared readwrite, private.
473 bool remap_shared_readonly_as_readwrite();
474
475 static bool memory_mapping_failed() {
476 CDS_ONLY(return _memory_mapping_failed;)
477 NOT_CDS(return false;)
478 }
479
480 static void allocate_shared_path_table(TRAPS);
481 static int add_shared_classpaths(int i, const char* which, ClassPathEntry *cpe, TRAPS);
482 static void check_nonempty_dir_in_shared_path_table();
483 bool check_module_paths();
484 bool validate_shared_path_table();
485 void validate_non_existent_class_paths();
486 static void set_shared_path_table(FileMapInfo* info) {
487 _shared_path_table = info->header()->shared_path_table();
488 }
489 static void update_jar_manifest(ClassPathEntry *cpe, SharedClassPathEntry* ent, TRAPS);
490 static int num_non_existent_class_paths();
491 static void record_non_existent_class_path_entry(const char* path);
492
493 #if INCLUDE_JVMTI
494 // Caller needs a ResourceMark because parts of the returned cfs are resource-allocated.
495 static ClassFileStream* open_stream_for_jvmti(InstanceKlass* ik, Handle class_loader, TRAPS);
496 #endif
497
498 static SharedClassPathEntry* shared_path(int index) {
499 return _shared_path_table.path_at(index);
500 }
501
502 static const char* shared_path_name(int index) {
503 assert(index >= 0, "Sanity");
504 return shared_path(index)->name();
505 }
549 GrowableArray<const char*>* create_path_array(const char* path) NOT_CDS_RETURN_(nullptr);
550 bool classpath_failure(const char* msg, const char* name) NOT_CDS_RETURN_(false);
551 unsigned int longest_common_app_classpath_prefix_len(int num_paths,
552 GrowableArray<const char*>* rp_array)
553 NOT_CDS_RETURN_(0);
554 bool check_paths(int shared_path_start_idx, int num_paths,
555 GrowableArray<const char*>* rp_array,
556 unsigned int dumptime_prefix_len,
557 unsigned int runtime_prefix_len) NOT_CDS_RETURN_(false);
558 void extract_module_paths(const char* runtime_path, GrowableArray<const char*>* module_paths);
559 bool validate_boot_class_paths() NOT_CDS_RETURN_(false);
560 bool validate_app_class_paths(int shared_app_paths_len) NOT_CDS_RETURN_(false);
561 bool map_heap_region_impl() NOT_CDS_JAVA_HEAP_RETURN_(false);
562 void dealloc_heap_region() NOT_CDS_JAVA_HEAP_RETURN;
563 bool can_use_heap_region();
564 bool load_heap_region() NOT_CDS_JAVA_HEAP_RETURN_(false);
565 bool map_heap_region() NOT_CDS_JAVA_HEAP_RETURN_(false);
566 void init_heap_region_relocation();
567 MapArchiveResult map_region(int i, intx addr_delta, char* mapped_base_address, ReservedSpace rs);
568 bool relocate_pointers_in_core_regions(intx addr_delta);
569
570 static MemRegion _mapped_heap_memregion;
571
572 public:
573 address heap_region_dumptime_address() NOT_CDS_JAVA_HEAP_RETURN_(nullptr);
574 address heap_region_requested_address() NOT_CDS_JAVA_HEAP_RETURN_(nullptr);
575 narrowOop encoded_heap_region_dumptime_address();
576
577 private:
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_CDS_FILEMAP_HPP
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208 // during dumping. At run time, we validate these entries according to their
209 // SharedClassPathEntry::_type. See:
210 // check_nonempty_dir_in_shared_path_table()
211 // validate_shared_path_table()
212 // validate_non_existent_class_paths()
213 size_t _shared_path_table_offset;
214
215 jshort _app_class_paths_start_index; // Index of first app classpath entry
216 jshort _app_module_paths_start_index; // Index of first module path entry
217 jshort _max_used_path_index; // max path index referenced during CDS dump
218 int _num_module_paths; // number of module path entries
219 bool _verify_local; // BytecodeVerificationLocal setting
220 bool _verify_remote; // BytecodeVerificationRemote setting
221 bool _has_platform_or_app_classes; // Archive contains app classes
222 char* _requested_base_address; // Archive relocation is not necessary if we map with this base address.
223 char* _mapped_base_address; // Actual base address where archive is mapped.
224
225 bool _allow_archiving_with_java_agent; // setting of the AllowArchivingWithJavaAgent option
226 bool _use_optimized_module_handling;// No module-relation VM options were specified, so we can skip
227 // some expensive operations.
228 bool _has_aot_linked_classes; // Was the CDS archive created with -XX:+AOTClassLinking
229 bool _has_full_module_graph; // Does this CDS archive contain the full archived module graph?
230 bool _has_archived_invokedynamic; // Does the archive have aot-linked invokedynamic CP entries?
231 bool _has_archived_packages;
232 bool _has_archived_protection_domains;
233 int _gc_kind; // Universe::heap()->kind();
234 char _gc_name[32]; // Universe::heap()->name();
235 size_t _ptrmap_size_in_bits; // Size of pointer relocation bitmap
236 HeapRootSegments _heap_root_segments; // Heap root segments info
237 size_t _heap_oopmap_start_pos; // The first bit in the oopmap corresponds to this position in the heap.
238 size_t _heap_ptrmap_start_pos; // The first bit in the ptrmap corresponds to this position in the heap.
239 size_t _rw_ptrmap_start_pos; // The first bit in the ptrmap corresponds to this position in the rw region
240 size_t _ro_ptrmap_start_pos; // The first bit in the ptrmap corresponds to this position in the ro region
241 char* from_mapped_offset(size_t offset) const {
242 return mapped_base_address() + offset;
243 }
244 void set_as_offset(char* p, size_t *offset);
245 public:
246 // Accessors -- fields declared in GenericCDSFileMapHeader
247 unsigned int magic() const { return _generic_header._magic; }
248 int crc() const { return _generic_header._crc; }
249 int version() const { return _generic_header._version; }
250 unsigned int header_size() const { return _generic_header._header_size; }
251 unsigned int base_archive_name_offset() const { return _generic_header._base_archive_name_offset; }
252 unsigned int base_archive_name_size() const { return _generic_header._base_archive_name_size; }
253 unsigned int common_app_classpath_prefix_size() const { return _common_app_classpath_prefix_size; }
254
255 void set_magic(unsigned int m) { _generic_header._magic = m; }
258 void set_header_size(unsigned int s) { _generic_header._header_size = s; }
259 void set_base_archive_name_offset(unsigned int s) { _generic_header._base_archive_name_offset = s; }
260 void set_base_archive_name_size(unsigned int s) { _generic_header._base_archive_name_size = s; }
261 void set_common_app_classpath_prefix_size(unsigned int s) { _common_app_classpath_prefix_size = s; }
262
263 bool is_static() const { return magic() == CDS_ARCHIVE_MAGIC; }
264 size_t core_region_alignment() const { return _core_region_alignment; }
265 int obj_alignment() const { return _obj_alignment; }
266 address narrow_oop_base() const { return _narrow_oop_base; }
267 int narrow_oop_shift() const { return _narrow_oop_shift; }
268 bool compact_strings() const { return _compact_strings; }
269 uintx max_heap_size() const { return _max_heap_size; }
270 CompressedOops::Mode narrow_oop_mode() const { return _narrow_oop_mode; }
271 char* cloned_vtables() const { return from_mapped_offset(_cloned_vtables_offset); }
272 char* serialized_data() const { return from_mapped_offset(_serialized_data_offset); }
273 const char* jvm_ident() const { return _jvm_ident; }
274 char* requested_base_address() const { return _requested_base_address; }
275 char* mapped_base_address() const { return _mapped_base_address; }
276 bool has_platform_or_app_classes() const { return _has_platform_or_app_classes; }
277 bool has_non_jar_in_classpath() const { return _has_non_jar_in_classpath; }
278 bool has_aot_linked_classes() const { return _has_aot_linked_classes; }
279 int gc_kind() const { return _gc_kind; }
280 const char* gc_name() const { return _gc_name; }
281 size_t ptrmap_size_in_bits() const { return _ptrmap_size_in_bits; }
282 bool compressed_oops() const { return _compressed_oops; }
283 bool compressed_class_pointers() const { return _compressed_class_ptrs; }
284 HeapRootSegments heap_root_segments() const { return _heap_root_segments; }
285 bool has_full_module_graph() const { return _has_full_module_graph; }
286 size_t heap_oopmap_start_pos() const { return _heap_oopmap_start_pos; }
287 size_t heap_ptrmap_start_pos() const { return _heap_ptrmap_start_pos; }
288 size_t rw_ptrmap_start_pos() const { return _rw_ptrmap_start_pos; }
289 size_t ro_ptrmap_start_pos() const { return _ro_ptrmap_start_pos; }
290 // FIXME: These should really return int
291 jshort max_used_path_index() const { return _max_used_path_index; }
292 jshort app_module_paths_start_index() const { return _app_module_paths_start_index; }
293 jshort app_class_paths_start_index() const { return _app_class_paths_start_index; }
294 int num_module_paths() const { return _num_module_paths; }
295
296 void set_has_platform_or_app_classes(bool v) { _has_platform_or_app_classes = v; }
297 void set_cloned_vtables(char* p) { set_as_offset(p, &_cloned_vtables_offset); }
298 void set_serialized_data(char* p) { set_as_offset(p, &_serialized_data_offset); }
299 void set_mapped_base_address(char* p) { _mapped_base_address = p; }
300 void set_heap_root_segments(HeapRootSegments segments) { _heap_root_segments = segments; }
301 void set_heap_oopmap_start_pos(size_t n) { _heap_oopmap_start_pos = n; }
441
442 static void set_current_info(FileMapInfo* info) {
443 CDS_ONLY(_current_info = info;)
444 }
445
446 static FileMapInfo* dynamic_info() {
447 CDS_ONLY(return _dynamic_archive_info;)
448 NOT_CDS(return nullptr;)
449 }
450
451 static void assert_mark(bool check);
452
453 // File manipulation.
454 bool initialize() NOT_CDS_RETURN_(false);
455 bool open_for_read();
456 void open_for_write();
457 void write_header();
458 void write_region(int region, char* base, size_t size,
459 bool read_only, bool allow_exec);
460 size_t remove_bitmap_zeros(CHeapBitMap* map);
461 char* write_bitmap_region(CHeapBitMap* rw_ptrmap, CHeapBitMap* ro_ptrmap,
462 CHeapBitMap* cc_ptrmap, ArchiveHeapInfo* heap_info,
463 size_t &size_in_bytes);
464 size_t write_heap_region(ArchiveHeapInfo* heap_info);
465 void write_bytes(const void* buffer, size_t count);
466 void write_bytes_aligned(const void* buffer, size_t count);
467 size_t read_bytes(void* buffer, size_t count);
468 static size_t readonly_total();
469 MapArchiveResult map_regions(int regions[], int num_regions, char* mapped_base_address, ReservedSpace rs);
470 void unmap_regions(int regions[], int num_regions);
471 void map_or_load_heap_region() NOT_CDS_JAVA_HEAP_RETURN;
472 void fixup_mapped_heap_region() NOT_CDS_JAVA_HEAP_RETURN;
473 void patch_heap_embedded_pointers() NOT_CDS_JAVA_HEAP_RETURN;
474 bool has_heap_region() NOT_CDS_JAVA_HEAP_RETURN_(false);
475 MemRegion get_heap_region_requested_range() NOT_CDS_JAVA_HEAP_RETURN_(MemRegion());
476 bool read_region(int i, char* base, size_t size, bool do_commit);
477 char* map_bitmap_region();
478 bool map_cached_code_region(ReservedSpace rs);
479 void unmap_region(int i);
480 void close();
481 bool is_open() { return _file_open; }
482 ReservedSpace reserve_shared_memory();
483
484 // JVM/TI RedefineClasses() support:
485 // Remap the shared readonly space to shared readwrite, private.
486 bool remap_shared_readonly_as_readwrite();
487
488 static bool memory_mapping_failed() {
489 CDS_ONLY(return _memory_mapping_failed;)
490 NOT_CDS(return false;)
491 }
492
493 static void allocate_shared_path_table(TRAPS);
494 static int add_shared_classpaths(int i, const char* which, ClassPathEntry *cpe, TRAPS);
495 static void check_nonempty_dir_in_shared_path_table();
496 bool check_module_paths();
497 bool validate_shared_path_table();
498 bool validate_non_existent_class_paths();
499 bool validate_aot_class_linking();
500 static void set_shared_path_table(FileMapInfo* info) {
501 _shared_path_table = info->header()->shared_path_table();
502 }
503 static void update_jar_manifest(ClassPathEntry *cpe, SharedClassPathEntry* ent, TRAPS);
504 static int num_non_existent_class_paths();
505 static void record_non_existent_class_path_entry(const char* path);
506
507 #if INCLUDE_JVMTI
508 // Caller needs a ResourceMark because parts of the returned cfs are resource-allocated.
509 static ClassFileStream* open_stream_for_jvmti(InstanceKlass* ik, Handle class_loader, TRAPS);
510 #endif
511
512 static SharedClassPathEntry* shared_path(int index) {
513 return _shared_path_table.path_at(index);
514 }
515
516 static const char* shared_path_name(int index) {
517 assert(index >= 0, "Sanity");
518 return shared_path(index)->name();
519 }
563 GrowableArray<const char*>* create_path_array(const char* path) NOT_CDS_RETURN_(nullptr);
564 bool classpath_failure(const char* msg, const char* name) NOT_CDS_RETURN_(false);
565 unsigned int longest_common_app_classpath_prefix_len(int num_paths,
566 GrowableArray<const char*>* rp_array)
567 NOT_CDS_RETURN_(0);
568 bool check_paths(int shared_path_start_idx, int num_paths,
569 GrowableArray<const char*>* rp_array,
570 unsigned int dumptime_prefix_len,
571 unsigned int runtime_prefix_len) NOT_CDS_RETURN_(false);
572 void extract_module_paths(const char* runtime_path, GrowableArray<const char*>* module_paths);
573 bool validate_boot_class_paths() NOT_CDS_RETURN_(false);
574 bool validate_app_class_paths(int shared_app_paths_len) NOT_CDS_RETURN_(false);
575 bool map_heap_region_impl() NOT_CDS_JAVA_HEAP_RETURN_(false);
576 void dealloc_heap_region() NOT_CDS_JAVA_HEAP_RETURN;
577 bool can_use_heap_region();
578 bool load_heap_region() NOT_CDS_JAVA_HEAP_RETURN_(false);
579 bool map_heap_region() NOT_CDS_JAVA_HEAP_RETURN_(false);
580 void init_heap_region_relocation();
581 MapArchiveResult map_region(int i, intx addr_delta, char* mapped_base_address, ReservedSpace rs);
582 bool relocate_pointers_in_core_regions(intx addr_delta);
583 void relocate_pointers_in_cached_code_region();
584 static MemRegion _mapped_heap_memregion;
585
586 public:
587 address heap_region_dumptime_address() NOT_CDS_JAVA_HEAP_RETURN_(nullptr);
588 address heap_region_requested_address() NOT_CDS_JAVA_HEAP_RETURN_(nullptr);
589 narrowOop encoded_heap_region_dumptime_address();
590
591 private:
592
593 #if INCLUDE_JVMTI
594 static ClassPathEntry** _classpath_entries_for_jvmti;
595 static ClassPathEntry* get_classpath_entry_for_jvmti(int i, TRAPS);
596 #endif
597 };
598
599 #endif // SHARE_CDS_FILEMAP_HPP
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