207 // during dumping. At run time, we validate these entries according to their
208 // SharedClassPathEntry::_type. See:
209 // check_nonempty_dir_in_shared_path_table()
210 // validate_shared_path_table()
211 // validate_non_existent_class_paths()
212 size_t _shared_path_table_offset;
213
214 jshort _app_class_paths_start_index; // Index of first app classpath entry
215 jshort _app_module_paths_start_index; // Index of first module path entry
216 jshort _max_used_path_index; // max path index referenced during CDS dump
217 int _num_module_paths; // number of module path entries
218 bool _verify_local; // BytecodeVerificationLocal setting
219 bool _verify_remote; // BytecodeVerificationRemote setting
220 bool _has_platform_or_app_classes; // Archive contains app classes
221 char* _requested_base_address; // Archive relocation is not necessary if we map with this base address.
222 char* _mapped_base_address; // Actual base address where archive is mapped.
223
224 bool _allow_archiving_with_java_agent; // setting of the AllowArchivingWithJavaAgent option
225 bool _use_optimized_module_handling;// No module-relation VM options were specified, so we can skip
226 // some expensive operations.
227 bool _has_full_module_graph; // Does this CDS archive contain the full archived module graph?
228 size_t _heap_roots_offset; // Offset of the HeapShared::roots() object, from the bottom
229 // of the archived heap objects, in bytes.
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
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 size_t heap_roots_offset() const { return _heap_roots_offset; }
274 size_t heap_oopmap_start_pos() const { return _heap_oopmap_start_pos; }
275 size_t heap_ptrmap_start_pos() const { return _heap_ptrmap_start_pos; }
276 size_t rw_ptrmap_start_pos() const { return _rw_ptrmap_start_pos; }
277 size_t ro_ptrmap_start_pos() const { return _ro_ptrmap_start_pos; }
278 // FIXME: These should really return int
279 jshort max_used_path_index() const { return _max_used_path_index; }
280 jshort app_module_paths_start_index() const { return _app_module_paths_start_index; }
281 jshort app_class_paths_start_index() const { return _app_class_paths_start_index; }
282 int num_module_paths() const { return _num_module_paths; }
283
284 void set_has_platform_or_app_classes(bool v) { _has_platform_or_app_classes = v; }
285 void set_cloned_vtables(char* p) { set_as_offset(p, &_cloned_vtables_offset); }
286 void set_serialized_data(char* p) { set_as_offset(p, &_serialized_data_offset); }
287 void set_mapped_base_address(char* p) { _mapped_base_address = p; }
288 void set_heap_roots_offset(size_t n) { _heap_roots_offset = n; }
289 void set_heap_oopmap_start_pos(size_t n) { _heap_oopmap_start_pos = n; }
290 void set_heap_ptrmap_start_pos(size_t n) { _heap_ptrmap_start_pos = n; }
429
430 static void set_current_info(FileMapInfo* info) {
431 CDS_ONLY(_current_info = info;)
432 }
433
434 static FileMapInfo* dynamic_info() {
435 CDS_ONLY(return _dynamic_archive_info;)
436 NOT_CDS(return nullptr;)
437 }
438
439 static void assert_mark(bool check);
440
441 // File manipulation.
442 bool initialize() NOT_CDS_RETURN_(false);
443 bool open_for_read();
444 void open_for_write();
445 void write_header();
446 void write_region(int region, char* base, size_t size,
447 bool read_only, bool allow_exec);
448 size_t remove_bitmap_leading_zeros(CHeapBitMap* map);
449 char* write_bitmap_region(CHeapBitMap* rw_ptrmap, CHeapBitMap* ro_ptrmap, ArchiveHeapInfo* heap_info,
450 size_t &size_in_bytes);
451 size_t write_heap_region(ArchiveHeapInfo* heap_info);
452 void write_bytes(const void* buffer, size_t count);
453 void write_bytes_aligned(const void* buffer, size_t count);
454 size_t read_bytes(void* buffer, size_t count);
455 static size_t readonly_total();
456 MapArchiveResult map_regions(int regions[], int num_regions, char* mapped_base_address, ReservedSpace rs);
457 void unmap_regions(int regions[], int num_regions);
458 void map_or_load_heap_region() NOT_CDS_JAVA_HEAP_RETURN;
459 void fixup_mapped_heap_region() NOT_CDS_JAVA_HEAP_RETURN;
460 void patch_heap_embedded_pointers() NOT_CDS_JAVA_HEAP_RETURN;
461 bool has_heap_region() NOT_CDS_JAVA_HEAP_RETURN_(false);
462 MemRegion get_heap_region_requested_range() NOT_CDS_JAVA_HEAP_RETURN_(MemRegion());
463 bool read_region(int i, char* base, size_t size, bool do_commit);
464 char* map_bitmap_region();
465 void unmap_region(int i);
466 void close();
467 bool is_open() { return _file_open; }
468 ReservedSpace reserve_shared_memory();
469
470 // JVM/TI RedefineClasses() support:
471 // Remap the shared readonly space to shared readwrite, private.
472 bool remap_shared_readonly_as_readwrite();
473
474 static bool memory_mapping_failed() {
475 CDS_ONLY(return _memory_mapping_failed;)
476 NOT_CDS(return false;)
477 }
478
479 static void allocate_shared_path_table(TRAPS);
480 static int add_shared_classpaths(int i, const char* which, ClassPathEntry *cpe, TRAPS);
481 static void check_nonempty_dir_in_shared_path_table();
482 bool check_module_paths();
483 bool validate_shared_path_table();
484 void validate_non_existent_class_paths();
485 static void set_shared_path_table(FileMapInfo* info) {
486 _shared_path_table = info->header()->shared_path_table();
487 }
488 static void update_jar_manifest(ClassPathEntry *cpe, SharedClassPathEntry* ent, TRAPS);
489 static int num_non_existent_class_paths();
490 static void record_non_existent_class_path_entry(const char* path);
491
492 #if INCLUDE_JVMTI
493 // Caller needs a ResourceMark because parts of the returned cfs are resource-allocated.
494 static ClassFileStream* open_stream_for_jvmti(InstanceKlass* ik, Handle class_loader, TRAPS);
495 #endif
496
497 static SharedClassPathEntry* shared_path(int index) {
498 return _shared_path_table.path_at(index);
499 }
500
501 static const char* shared_path_name(int index) {
502 assert(index >= 0, "Sanity");
503 return shared_path(index)->name();
504 }
547 GrowableArray<const char*>* create_dumptime_app_classpath_array() NOT_CDS_RETURN_(nullptr);
548 GrowableArray<const char*>* create_path_array(const char* path) NOT_CDS_RETURN_(nullptr);
549 bool classpath_failure(const char* msg, const char* name) NOT_CDS_RETURN_(false);
550 unsigned int longest_common_app_classpath_prefix_len(int num_paths,
551 GrowableArray<const char*>* rp_array)
552 NOT_CDS_RETURN_(0);
553 bool check_paths(int shared_path_start_idx, int num_paths,
554 GrowableArray<const char*>* rp_array,
555 unsigned int dumptime_prefix_len,
556 unsigned int runtime_prefix_len) NOT_CDS_RETURN_(false);
557 bool validate_boot_class_paths() NOT_CDS_RETURN_(false);
558 bool validate_app_class_paths(int shared_app_paths_len) NOT_CDS_RETURN_(false);
559 bool map_heap_region_impl() NOT_CDS_JAVA_HEAP_RETURN_(false);
560 void dealloc_heap_region() NOT_CDS_JAVA_HEAP_RETURN;
561 bool can_use_heap_region();
562 bool load_heap_region() NOT_CDS_JAVA_HEAP_RETURN_(false);
563 bool map_heap_region() NOT_CDS_JAVA_HEAP_RETURN_(false);
564 void init_heap_region_relocation();
565 MapArchiveResult map_region(int i, intx addr_delta, char* mapped_base_address, ReservedSpace rs);
566 bool relocate_pointers_in_core_regions(intx addr_delta);
567
568 static MemRegion _mapped_heap_memregion;
569
570 public:
571 address heap_region_dumptime_address() NOT_CDS_JAVA_HEAP_RETURN_(nullptr);
572 address heap_region_requested_address() NOT_CDS_JAVA_HEAP_RETURN_(nullptr);
573 narrowOop encoded_heap_region_dumptime_address();
574
575 private:
576
577 #if INCLUDE_JVMTI
578 static ClassPathEntry** _classpath_entries_for_jvmti;
579 static ClassPathEntry* get_classpath_entry_for_jvmti(int i, TRAPS);
580 #endif
581 };
582
583 #endif // SHARE_CDS_FILEMAP_HPP
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207 // during dumping. At run time, we validate these entries according to their
208 // SharedClassPathEntry::_type. See:
209 // check_nonempty_dir_in_shared_path_table()
210 // validate_shared_path_table()
211 // validate_non_existent_class_paths()
212 size_t _shared_path_table_offset;
213
214 jshort _app_class_paths_start_index; // Index of first app classpath entry
215 jshort _app_module_paths_start_index; // Index of first module path entry
216 jshort _max_used_path_index; // max path index referenced during CDS dump
217 int _num_module_paths; // number of module path entries
218 bool _verify_local; // BytecodeVerificationLocal setting
219 bool _verify_remote; // BytecodeVerificationRemote setting
220 bool _has_platform_or_app_classes; // Archive contains app classes
221 char* _requested_base_address; // Archive relocation is not necessary if we map with this base address.
222 char* _mapped_base_address; // Actual base address where archive is mapped.
223
224 bool _allow_archiving_with_java_agent; // setting of the AllowArchivingWithJavaAgent option
225 bool _use_optimized_module_handling;// No module-relation VM options were specified, so we can skip
226 // some expensive operations.
227 bool _has_preloaded_classes; // Does the CDS archive have preloaded classes?
228 bool _has_full_module_graph; // Does this CDS archive contain the full archived module graph?
229 bool _has_archived_invokedynamic; // Does the archive have preresolved invokedynamic CP entries?
230 bool _has_archived_packages;
231 bool _has_archived_protection_domains;
232 int _gc_kind; // Universe::heap()->kind();
233 char _gc_name[32]; // Universe::heap()->name();
234 size_t _ptrmap_size_in_bits; // Size of pointer relocation bitmap
235 size_t _heap_roots_offset; // Offset of the HeapShared::roots() object, from the bottom
236 // of the archived heap objects, in bytes.
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
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_preloaded_classes() const { return _has_preloaded_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 size_t heap_roots_offset() const { return _heap_roots_offset; }
285 size_t heap_oopmap_start_pos() const { return _heap_oopmap_start_pos; }
286 size_t heap_ptrmap_start_pos() const { return _heap_ptrmap_start_pos; }
287 size_t rw_ptrmap_start_pos() const { return _rw_ptrmap_start_pos; }
288 size_t ro_ptrmap_start_pos() const { return _ro_ptrmap_start_pos; }
289 // FIXME: These should really return int
290 jshort max_used_path_index() const { return _max_used_path_index; }
291 jshort app_module_paths_start_index() const { return _app_module_paths_start_index; }
292 jshort app_class_paths_start_index() const { return _app_class_paths_start_index; }
293 int num_module_paths() const { return _num_module_paths; }
294
295 void set_has_platform_or_app_classes(bool v) { _has_platform_or_app_classes = v; }
296 void set_cloned_vtables(char* p) { set_as_offset(p, &_cloned_vtables_offset); }
297 void set_serialized_data(char* p) { set_as_offset(p, &_serialized_data_offset); }
298 void set_mapped_base_address(char* p) { _mapped_base_address = p; }
299 void set_heap_roots_offset(size_t n) { _heap_roots_offset = n; }
300 void set_heap_oopmap_start_pos(size_t n) { _heap_oopmap_start_pos = n; }
301 void set_heap_ptrmap_start_pos(size_t n) { _heap_ptrmap_start_pos = n; }
440
441 static void set_current_info(FileMapInfo* info) {
442 CDS_ONLY(_current_info = info;)
443 }
444
445 static FileMapInfo* dynamic_info() {
446 CDS_ONLY(return _dynamic_archive_info;)
447 NOT_CDS(return nullptr;)
448 }
449
450 static void assert_mark(bool check);
451
452 // File manipulation.
453 bool initialize() NOT_CDS_RETURN_(false);
454 bool open_for_read();
455 void open_for_write();
456 void write_header();
457 void write_region(int region, char* base, size_t size,
458 bool read_only, bool allow_exec);
459 size_t remove_bitmap_leading_zeros(CHeapBitMap* map);
460 char* write_bitmap_region(CHeapBitMap* rw_ptrmap, CHeapBitMap* ro_ptrmap,
461 CHeapBitMap* cc_ptrmap, ArchiveHeapInfo* heap_info,
462 size_t &size_in_bytes);
463 size_t write_heap_region(ArchiveHeapInfo* heap_info);
464 void write_bytes(const void* buffer, size_t count);
465 void write_bytes_aligned(const void* buffer, size_t count);
466 size_t read_bytes(void* buffer, size_t count);
467 static size_t readonly_total();
468 MapArchiveResult map_regions(int regions[], int num_regions, char* mapped_base_address, ReservedSpace rs);
469 void unmap_regions(int regions[], int num_regions);
470 void map_or_load_heap_region() NOT_CDS_JAVA_HEAP_RETURN;
471 void fixup_mapped_heap_region() NOT_CDS_JAVA_HEAP_RETURN;
472 void patch_heap_embedded_pointers() NOT_CDS_JAVA_HEAP_RETURN;
473 bool has_heap_region() NOT_CDS_JAVA_HEAP_RETURN_(false);
474 MemRegion get_heap_region_requested_range() NOT_CDS_JAVA_HEAP_RETURN_(MemRegion());
475 bool read_region(int i, char* base, size_t size, bool do_commit);
476 char* map_bitmap_region();
477 bool map_cached_code_region(ReservedSpace rs);
478 void unmap_region(int i);
479 void close();
480 bool is_open() { return _file_open; }
481 ReservedSpace reserve_shared_memory();
482
483 // JVM/TI RedefineClasses() support:
484 // Remap the shared readonly space to shared readwrite, private.
485 bool remap_shared_readonly_as_readwrite();
486
487 static bool memory_mapping_failed() {
488 CDS_ONLY(return _memory_mapping_failed;)
489 NOT_CDS(return false;)
490 }
491
492 static void allocate_shared_path_table(TRAPS);
493 static int add_shared_classpaths(int i, const char* which, ClassPathEntry *cpe, TRAPS);
494 static void check_nonempty_dir_in_shared_path_table();
495 bool check_module_paths();
496 bool validate_shared_path_table();
497 void validate_non_existent_class_paths();
498 bool validate_leyden_config();
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 // Caller needs a ResourceMark because parts of the returned cfs are resource-allocated.
508 static ClassFileStream* open_stream_for_jvmti(InstanceKlass* ik, Handle class_loader, TRAPS);
509 #endif
510
511 static SharedClassPathEntry* shared_path(int index) {
512 return _shared_path_table.path_at(index);
513 }
514
515 static const char* shared_path_name(int index) {
516 assert(index >= 0, "Sanity");
517 return shared_path(index)->name();
518 }
561 GrowableArray<const char*>* create_dumptime_app_classpath_array() NOT_CDS_RETURN_(nullptr);
562 GrowableArray<const char*>* create_path_array(const char* path) NOT_CDS_RETURN_(nullptr);
563 bool classpath_failure(const char* msg, const char* name) NOT_CDS_RETURN_(false);
564 unsigned int longest_common_app_classpath_prefix_len(int num_paths,
565 GrowableArray<const char*>* rp_array)
566 NOT_CDS_RETURN_(0);
567 bool check_paths(int shared_path_start_idx, int num_paths,
568 GrowableArray<const char*>* rp_array,
569 unsigned int dumptime_prefix_len,
570 unsigned int runtime_prefix_len) NOT_CDS_RETURN_(false);
571 bool validate_boot_class_paths() NOT_CDS_RETURN_(false);
572 bool validate_app_class_paths(int shared_app_paths_len) NOT_CDS_RETURN_(false);
573 bool map_heap_region_impl() NOT_CDS_JAVA_HEAP_RETURN_(false);
574 void dealloc_heap_region() NOT_CDS_JAVA_HEAP_RETURN;
575 bool can_use_heap_region();
576 bool load_heap_region() NOT_CDS_JAVA_HEAP_RETURN_(false);
577 bool map_heap_region() NOT_CDS_JAVA_HEAP_RETURN_(false);
578 void init_heap_region_relocation();
579 MapArchiveResult map_region(int i, intx addr_delta, char* mapped_base_address, ReservedSpace rs);
580 bool relocate_pointers_in_core_regions(intx addr_delta);
581 void relocate_pointers_in_cached_code_region();
582 static MemRegion _mapped_heap_memregion;
583
584 public:
585 address heap_region_dumptime_address() NOT_CDS_JAVA_HEAP_RETURN_(nullptr);
586 address heap_region_requested_address() NOT_CDS_JAVA_HEAP_RETURN_(nullptr);
587 narrowOop encoded_heap_region_dumptime_address();
588
589 private:
590
591 #if INCLUDE_JVMTI
592 static ClassPathEntry** _classpath_entries_for_jvmti;
593 static ClassPathEntry* get_classpath_entry_for_jvmti(int i, TRAPS);
594 #endif
595 };
596
597 #endif // SHARE_CDS_FILEMAP_HPP
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