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 bool _use_optimized_module_handling;// No module-relation VM options were specified, so we can skip
231 // some expensive operations.
232 size_t _ptrmap_size_in_bits; // Size of pointer relocation bitmap
233
234 char* from_mapped_offset(size_t offset) const {
235 return mapped_base_address() + offset;
236 }
237 void set_mapped_offset(char* p, size_t *offset) {
238 assert(p >= mapped_base_address(), "sanity");
239 *offset = p - mapped_base_address();
240 }
241 public:
242 // Accessors -- fields declared in CDSFileMapHeaderBase
243 unsigned int magic() const {return _magic;}
244 int crc() const { return _crc; }
245 int version() const { return _version; }
246
247 void set_crc(int crc_value) { _crc = crc_value; }
248 void set_version(int v) { _version = v; }
249
250 // Accessors -- fields declared in FileMapHeader
251
252 size_t header_size() const { return _header_size; }
253 size_t alignment() const { return _alignment; }
254 int obj_alignment() const { return _obj_alignment; }
255 address narrow_oop_base() const { return _narrow_oop_base; }
256 int narrow_oop_shift() const { return _narrow_oop_shift; }
257 bool compact_strings() const { return _compact_strings; }
258 uintx max_heap_size() const { return _max_heap_size; }
259 CompressedOops::Mode narrow_oop_mode() const { return _narrow_oop_mode; }
260 int narrow_klass_shift() const { return _narrow_klass_shift; }
261 address narrow_klass_base() const { return (address)mapped_base_address(); }
262 char* cloned_vtables() const { return from_mapped_offset(_cloned_vtables_offset); }
263 char* serialized_data() const { return from_mapped_offset(_serialized_data_offset); }
264 address i2i_entry_code_buffers() const { return (address)from_mapped_offset(_i2i_entry_code_buffers_offset); }
265 size_t i2i_entry_code_buffers_size() const { return _i2i_entry_code_buffers_size; }
266 address heap_end() const { return _heap_end; }
267 bool base_archive_is_default() const { return _base_archive_is_default; }
268 const char* jvm_ident() const { return _jvm_ident; }
269 size_t base_archive_name_size() const { return _base_archive_name_size; }
270 char* requested_base_address() const { return _requested_base_address; }
271 char* mapped_base_address() const { return _mapped_base_address; }
272 bool has_platform_or_app_classes() const { return _has_platform_or_app_classes; }
273 size_t ptrmap_size_in_bits() const { return _ptrmap_size_in_bits; }
274 bool compressed_oops() const { return _compressed_oops; }
275 bool compressed_class_pointers() const { return _compressed_class_ptrs; }
276 // FIXME: These should really return int
277 jshort max_used_path_index() const { return _max_used_path_index; }
278 jshort app_module_paths_start_index() const { return _app_module_paths_start_index; }
279 jshort app_class_paths_start_index() const { return _app_class_paths_start_index; }
280 jshort num_module_paths() const { return _num_module_paths; }
281
282 void set_has_platform_or_app_classes(bool v) { _has_platform_or_app_classes = v; }
283 void set_cloned_vtables(char* p) { set_mapped_offset(p, &_cloned_vtables_offset); }
284 void set_serialized_data(char* p) { set_mapped_offset(p, &_serialized_data_offset); }
285 void set_base_archive_name_size(size_t s) { _base_archive_name_size = s; }
286 void set_base_archive_is_default(bool b) { _base_archive_is_default = b; }
287 void set_header_size(size_t s) { _header_size = s; }
288 void set_ptrmap_size_in_bits(size_t s) { _ptrmap_size_in_bits = s; }
289 void set_mapped_base_address(char* p) { _mapped_base_address = p; }
290 void set_i2i_entry_code_buffers(address p, size_t s) {
291 set_mapped_offset((char*)p, &_i2i_entry_code_buffers_offset);
292 _i2i_entry_code_buffers_size = s;
293 }
294
295 void set_shared_path_table(SharedPathTable table) {
296 set_mapped_offset((char*)table.table(), &_shared_path_table_offset);
297 _shared_path_table_size = table.size();
298 }
299
300 void set_final_requested_base(char* b) {
301 _requested_base_address = b;
302 _mapped_base_address = 0;
303 }
304
305 SharedPathTable shared_path_table() const {
306 return SharedPathTable((Array<u8>*)from_mapped_offset(_shared_path_table_offset),
307 _shared_path_table_size);
308 }
309
310 bool validate();
311 int compute_crc();
312
313 FileMapRegion* space_at(int i) {
314 assert(is_valid_region(i), "invalid region");
315 return FileMapRegion::cast(&_space[i]);
316 }
317
318 void populate(FileMapInfo* info, size_t alignment);
319
320 static bool is_valid_region(int region) {
321 return (0 <= region && region < NUM_CDS_REGIONS);
322 }
323 };
324
325 class FileMapInfo : public CHeapObj<mtInternal> {
326 private:
327 friend class ManifestStream;
328 friend class VMStructs;
329 friend class CDSOffsets;
330 friend class FileMapHeader;
331
332 bool _is_static;
333 bool _file_open;
334 bool _is_mapped;
335 int _fd;
336 size_t _file_offset;
337 const char* _full_path;
338 const char* _base_archive_name;
339 FileMapHeader* _header;
340
341 // TODO: Probably change the following to be non-static
342 static SharedPathTable _shared_path_table;
343 static SharedPathTable _saved_shared_path_table;
344 static bool _validating_shared_path_table;
345
346 // FileMapHeader describes the shared space data in the file to be
347 // mapped. This structure gets written to a file. It is not a class, so
348 // that the compilers don't add any compiler-private data to it.
349
350 static FileMapInfo* _current_info;
351 static FileMapInfo* _dynamic_archive_info;
352 static bool _heap_pointers_need_patching;
353 static bool _memory_mapping_failed;
354 static GrowableArray<const char*>* _non_existent_class_paths;
355
356 FileMapHeader *header() const { return _header; }
357
358 public:
359 static bool get_base_archive_name_from_header(const char* archive_name,
360 int* size, char** base_archive_name);
361 static bool check_archive(const char* archive_name, bool is_static);
362 static SharedPathTable shared_path_table() {
363 return _shared_path_table;
364 }
365 static SharedPathTable saved_shared_path_table() {
366 return _saved_shared_path_table;
367 }
368
369 bool init_from_file(int fd);
370 static void metaspace_pointers_do(MetaspaceClosure* it, bool use_copy = true);
371
372 void log_paths(const char* msg, int start_idx, int end_idx);
373
374 FileMapInfo(bool is_static);
375 ~FileMapInfo();
376
377 // Accessors
378 int compute_header_crc() const { return header()->compute_crc(); }
379 void set_header_crc(int crc) { header()->set_crc(crc); }
380 int space_crc(int i) const { return space_at(i)->crc(); }
381 void populate_header(size_t alignment);
382 bool validate_header();
383 void invalidate();
384 int crc() const { return header()->crc(); }
385 int version() const { return header()->version(); }
386 size_t alignment() const { return header()->alignment(); }
387 address narrow_oop_base() const { return header()->narrow_oop_base(); }
388 int narrow_oop_shift() const { return header()->narrow_oop_shift(); }
389 uintx max_heap_size() const { return header()->max_heap_size(); }
390 address narrow_klass_base() const { return header()->narrow_klass_base(); }
391 int narrow_klass_shift() const { return header()->narrow_klass_shift(); }
392
393 CompressedOops::Mode narrow_oop_mode() const { return header()->narrow_oop_mode(); }
394 jshort app_module_paths_start_index() const { return header()->app_module_paths_start_index(); }
395 jshort app_class_paths_start_index() const { return header()->app_class_paths_start_index(); }
396
397 char* cloned_vtables() const { return header()->cloned_vtables(); }
398 void set_cloned_vtables(char* p) const { header()->set_cloned_vtables(p); }
399 char* serialized_data() const { return header()->serialized_data(); }
400 void set_serialized_data(char* p) const { header()->set_serialized_data(p); }
401
402 bool is_file_position_aligned() const;
403 void align_file_position();
404
405 address i2i_entry_code_buffers() const { return header()->i2i_entry_code_buffers(); }
406 size_t i2i_entry_code_buffers_size() const { return header()->i2i_entry_code_buffers_size(); }
407 void set_i2i_entry_code_buffers(address addr, size_t s) const {
408 header()->set_i2i_entry_code_buffers(addr, s);
409 }
410
411 bool is_static() const { return _is_static; }
412 bool is_mapped() const { return _is_mapped; }
413 void set_is_mapped(bool v) { _is_mapped = v; }
414 const char* full_path() const { return _full_path; }
415 void set_final_requested_base(char* b);
416
417 char* requested_base_address() const { return header()->requested_base_address(); }
418
419
420 class DynamicArchiveHeader* dynamic_header() const {
421 assert(!is_static(), "must be");
422 return (DynamicArchiveHeader*)header();
423 }
424
425 void set_has_platform_or_app_classes(bool v) {
426 header()->set_has_platform_or_app_classes(v);
427 }
428 bool has_platform_or_app_classes() const {
429 return header()->has_platform_or_app_classes();
430 }
431
432 static FileMapInfo* current_info() {
433 CDS_ONLY(return _current_info;)
434 NOT_CDS(return NULL;)
435 }
436
437 static void set_current_info(FileMapInfo* info) {
438 CDS_ONLY(_current_info = info;)
439 }
440
441 static FileMapInfo* dynamic_info() {
442 CDS_ONLY(return _dynamic_archive_info;)
443 NOT_CDS(return NULL;)
444 }
445
446 static void assert_mark(bool check);
447
448 // File manipulation.
449 bool initialize() NOT_CDS_RETURN_(false);
450 bool open_for_read();
451 void open_for_write(const char* path = NULL);
452 void write_header();
453 void write_region(int region, char* base, size_t size,
454 bool read_only, bool allow_exec);
455 void write_bitmap_region(const CHeapBitMap* ptrmap,
456 GrowableArray<ArchiveHeapOopmapInfo>* closed_oopmaps,
457 GrowableArray<ArchiveHeapOopmapInfo>* open_oopmaps);
458 size_t write_archive_heap_regions(GrowableArray<MemRegion> *heap_mem,
459 GrowableArray<ArchiveHeapOopmapInfo> *oopmaps,
460 int first_region_id, int max_num_regions);
461 void write_bytes(const void* buffer, size_t count);
462 void write_bytes_aligned(const void* buffer, size_t count);
463 size_t read_bytes(void* buffer, size_t count);
464 MapArchiveResult map_regions(int regions[], int num_regions, char* mapped_base_address, ReservedSpace rs);
465 void unmap_regions(int regions[], int num_regions);
466 void map_heap_regions() NOT_CDS_JAVA_HEAP_RETURN;
467 void fixup_mapped_heap_regions() NOT_CDS_JAVA_HEAP_RETURN;
468 void patch_archived_heap_embedded_pointers() NOT_CDS_JAVA_HEAP_RETURN;
469 void patch_archived_heap_embedded_pointers(MemRegion* ranges, int num_ranges,
470 int first_region_idx) NOT_CDS_JAVA_HEAP_RETURN;
471 bool has_heap_regions() NOT_CDS_JAVA_HEAP_RETURN_(false);
472 MemRegion get_heap_regions_range_with_current_oop_encoding_mode() NOT_CDS_JAVA_HEAP_RETURN_(MemRegion());
473 void unmap_region(int i);
474 bool verify_region_checksum(int i);
475 void close();
476 bool is_open() { return _file_open; }
477 ReservedSpace reserve_shared_memory();
478
479 // JVM/TI RedefineClasses() support:
480 // Remap the shared readonly space to shared readwrite, private.
481 bool remap_shared_readonly_as_readwrite();
482
483 // Errors.
484 static void fail_stop(const char *msg, ...) ATTRIBUTE_PRINTF(1, 2);
485 static void fail_continue(const char *msg, ...) ATTRIBUTE_PRINTF(1, 2);
486 static bool memory_mapping_failed() {
487 CDS_ONLY(return _memory_mapping_failed;)
488 NOT_CDS(return false;)
489 }
490 bool is_in_shared_region(const void* p, int idx) NOT_CDS_RETURN_(false);
491
492 // Stop CDS sharing and unmap CDS regions.
493 static void stop_sharing_and_unmap(const char* msg);
494
495 static void allocate_shared_path_table();
496 static void copy_shared_path_table(ClassLoaderData* loader_data, Thread* THREAD);
497 static int add_shared_classpaths(int i, const char* which, ClassPathEntry *cpe, TRAPS);
498 static void check_nonempty_dir_in_shared_path_table();
499 bool validate_shared_path_table();
500 void validate_non_existent_class_paths();
501 static void set_shared_path_table(FileMapInfo* info) {
502 _shared_path_table = info->header()->shared_path_table();
503 }
504 static void update_jar_manifest(ClassPathEntry *cpe, SharedClassPathEntry* ent, TRAPS);
505 static int num_non_existent_class_paths();
506 static void record_non_existent_class_path_entry(const char* path);
507
508 #if INCLUDE_JVMTI
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 }
520
521 static int get_number_of_shared_paths() {
522 return _shared_path_table.size();
523 }
524
525 char* region_addr(int idx);
526
527 // The offset of the first core region in the archive, relative to SharedBaseAddress
528 size_t mapping_base_offset() const { return first_core_space()->mapping_offset(); }
529 // The offset of the (exclusive) end of the last core region in this archive, relative to SharedBaseAddress
530 size_t mapping_end_offset() const { return last_core_space()->mapping_end_offset(); }
531
532 char* mapped_base() const { return first_core_space()->mapped_base(); }
533 char* mapped_end() const { return last_core_space()->mapped_end(); }
534
535 // Non-zero if the archive needs to be mapped a non-default location due to ASLR.
536 intx relocation_delta() const {
537 return header()->mapped_base_address() - header()->requested_base_address();
538 }
539
540 FileMapRegion* first_core_space() const;
541 FileMapRegion* last_core_space() const;
542
543 FileMapRegion* space_at(int i) const {
544 return header()->space_at(i);
545 }
546
547 private:
548 void seek_to_position(size_t pos);
549 char* skip_first_path_entry(const char* path) NOT_CDS_RETURN_(NULL);
550 int num_paths(const char* path) NOT_CDS_RETURN_(0);
551 GrowableArray<const char*>* create_path_array(const char* path) NOT_CDS_RETURN_(NULL);
552 bool classpath_failure(const char* msg, const char* name) NOT_CDS_RETURN_(false);
553 bool check_paths(int shared_path_start_idx, int num_paths,
554 GrowableArray<const char*>* rp_array) NOT_CDS_RETURN_(false);
555 bool validate_boot_class_paths() NOT_CDS_RETURN_(false);
556 bool validate_app_class_paths(int shared_app_paths_len) NOT_CDS_RETURN_(false);
557 bool map_heap_data(MemRegion **heap_mem, int first, int max, int* num,
558 bool is_open = false) NOT_CDS_JAVA_HEAP_RETURN_(false);
559 bool region_crc_check(char* buf, size_t size, int expected_crc) NOT_CDS_RETURN_(false);
560 void dealloc_archive_heap_regions(MemRegion* regions, int num) NOT_CDS_JAVA_HEAP_RETURN;
561 void map_heap_regions_impl() NOT_CDS_JAVA_HEAP_RETURN;
562 char* map_bitmap_region();
563 MapArchiveResult map_region(int i, intx addr_delta, char* mapped_base_address, ReservedSpace rs);
564 bool read_region(int i, char* base, size_t size);
565 bool relocate_pointers(intx addr_delta);
566 static size_t set_oopmaps_offset(GrowableArray<ArchiveHeapOopmapInfo> *oopmaps, size_t curr_size);
567 static size_t write_oopmaps(GrowableArray<ArchiveHeapOopmapInfo> *oopmaps, size_t curr_offset, uintptr_t* buffer);
568
569 // The starting address of spc, as calculated with CompressedOop::decode_non_null()
570 address start_address_as_decoded_with_current_oop_encoding_mode(FileMapRegion* spc) {
571 return decode_start_address(spc, true);
572 }
573
574 // The starting address of spc, as calculated with HeapShared::decode_from_archive()
575 address start_address_as_decoded_from_archive(FileMapRegion* spc) {
576 return decode_start_address(spc, false);
577 }
578
579 address decode_start_address(FileMapRegion* spc, bool with_current_oop_encoding_mode);
580
581 #if INCLUDE_JVMTI
582 static ClassPathEntry** _classpath_entries_for_jvmti;
583 static ClassPathEntry* get_classpath_entry_for_jvmti(int i, TRAPS);
584 #endif
585 };
586
587 #endif // SHARE_MEMORY_FILEMAP_HPP