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 _is_module_path;
62 bool _from_class_path_attr;
63 time_t _timestamp; // jar timestamp, 0 if is directory, modules image or other
64 int64_t _filesize; // jar/jimage file size, -1 if is directory, -2 if other
65 Array<char>* _name;
66 Array<u1>* _manifest;
67
68 public:
69 void init(bool is_modules_image, bool is_module_path, ClassPathEntry* cpe, TRAPS);
70 void init_as_non_existent(const char* path, TRAPS);
71 void metaspace_pointers_do(MetaspaceClosure* it);
72 bool validate(bool is_class_path = true) const;
73
74 // The _timestamp only gets set for jar files.
75 bool has_timestamp() const {
76 return _timestamp != 0;
77 }
78 bool is_dir() const { return _type == dir_entry; }
79 bool is_modules_image() const { return _type == modules_image_entry; }
80 bool is_jar() const { return _type == jar_entry; }
81 bool is_signed() const { return _type == signed_jar_entry; }
82 void set_is_signed() {
83 _type = signed_jar_entry;
84 }
85 bool from_class_path_attr() { return _from_class_path_attr; }
86 time_t timestamp() const { return _timestamp; }
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 bool in_named_module() {
100 return is_modules_image() || // modules image doesn't contain unnamed modules
101 _is_module_path; // module path doesn't contain unnamed modules
102 }
103 };
104
105 struct ArchiveHeapOopmapInfo {
106 address _oopmap; // bitmap for relocating embedded oops
107 size_t _offset; // this oopmap is stored at this offset from the bottom of the BM region
108 size_t _oopmap_size_in_bits;
109 size_t _oopmap_size_in_bytes;
110 };
111
112 class SharedPathTable {
113 Array<u8>* _table;
114 int _size;
115 public:
116 SharedPathTable() : _table(NULL), _size(0) {}
117 SharedPathTable(Array<u8>* table, int size) : _table(table), _size(size) {}
118
119 void dumptime_init(ClassLoaderData* loader_data, Thread* THREAD);
120 void metaspace_pointers_do(MetaspaceClosure* it);
121
122 int size() {
123 return _size;
124 }
125 SharedClassPathEntry* path_at(int index) {
126 if (index < 0) {
127 return NULL;
128 }
129 assert(index < _size, "sanity");
130 char* p = (char*)_table->data();
131 p += sizeof(SharedClassPathEntry) * index;
132 return (SharedClassPathEntry*)p;
133 }
134 Array<u8>* table() {return _table;}
135 void set_table(Array<u8>* table) {_table = table;}
136 };
137
138
139 class FileMapRegion: private CDSFileMapRegion {
140 void assert_is_heap_region() const {
141 assert(_is_heap_region, "must be heap region");
142 }
143 void assert_is_not_heap_region() const {
144 assert(!_is_heap_region, "must not be heap region");
145 }
146
147 public:
148 static FileMapRegion* cast(CDSFileMapRegion* p) {
149 return (FileMapRegion*)p;
150 }
151
152 // Accessors
153 int crc() const { return _crc; }
154 size_t file_offset() const { return _file_offset; }
155 size_t mapping_offset() const { return _mapping_offset; }
156 size_t mapping_end_offset() const { return _mapping_offset + used_aligned(); }
157 size_t used() const { return _used; }
158 size_t used_aligned() const; // aligned up to os::vm_allocation_granularity()
159 char* mapped_base() const { assert_is_not_heap_region(); return _mapped_base; }
160 char* mapped_end() const { return mapped_base() + used_aligned(); }
161 bool read_only() const { return _read_only != 0; }
162 bool allow_exec() const { return _allow_exec != 0; }
163 bool mapped_from_file() const { return _mapped_from_file != 0; }
164 size_t oopmap_offset() const { assert_is_heap_region(); return _oopmap_offset; }
165 size_t oopmap_size_in_bits() const { assert_is_heap_region(); return _oopmap_size_in_bits; }
166
167 void set_file_offset(size_t s) { _file_offset = s; }
168 void set_read_only(bool v) { _read_only = v; }
169 void set_mapped_base(char* p) { _mapped_base = p; }
170 void set_mapped_from_file(bool v) { _mapped_from_file = v; }
171 void init(int region_index, char* base, size_t size, bool read_only,
172 bool allow_exec, int crc);
173
174 void init_oopmap(size_t oopmap_offset, size_t size_in_bits) {
175 _oopmap_offset = oopmap_offset;
176 _oopmap_size_in_bits = size_in_bits;
177 }
178 };
179
180 class FileMapHeader: private CDSFileMapHeaderBase {
181 friend class CDSOffsets;
182 friend class VMStructs;
183
184 size_t _header_size;
185
186 // The following fields record the states of the VM during dump time.
187 // They are compared with the runtime states to see if the archive
188 // can be used.
189 size_t _alignment; // how shared archive should be aligned
190 int _obj_alignment; // value of ObjectAlignmentInBytes
191 address _narrow_oop_base; // compressed oop encoding base
192 int _narrow_oop_shift; // compressed oop encoding shift
193 bool _compact_strings; // value of CompactStrings
194 uintx _max_heap_size; // java max heap size during dumping
195 CompressedOops::Mode _narrow_oop_mode; // compressed oop encoding mode
196 int _narrow_klass_shift; // save narrow klass base and shift
197 bool _compressed_oops; // save the flag UseCompressedOops
198 bool _compressed_class_ptrs; // save the flag UseCompressedClassPointers
199 size_t _cloned_vtables_offset; // The address of the first cloned vtable
200 size_t _serialized_data_offset; // Data accessed using {ReadClosure,WriteClosure}::serialize()
201 size_t _i2i_entry_code_buffers_offset;
202 size_t _i2i_entry_code_buffers_size;
203 address _heap_end; // heap end at dump time.
204 bool _base_archive_is_default; // indicates if the base archive is the system default one
205
206 // The following fields are all sanity checks for whether this archive
207 // will function correctly with this JVM and the bootclasspath it's
208 // invoked with.
209 char _jvm_ident[JVM_IDENT_MAX]; // identifier string of the jvm that created this dump
210
211 // size of the base archive name including NULL terminator
212 size_t _base_archive_name_size;
213
214 // The following is a table of all the boot/app/module path entries that were used
215 // during dumping. At run time, we validate these entries according to their
216 // SharedClassPathEntry::_type. See:
217 // check_nonempty_dir_in_shared_path_table()
218 // validate_shared_path_table()
219 // validate_non_existent_class_paths()
220 size_t _shared_path_table_offset;
221 int _shared_path_table_size;
222
223 jshort _app_class_paths_start_index; // Index of first app classpath entry
224 jshort _app_module_paths_start_index; // Index of first module path entry
225 jshort _num_module_paths; // number of module path entries
226 jshort _max_used_path_index; // max path index referenced during CDS dump
227 bool _verify_local; // BytecodeVerificationLocal setting
228 bool _verify_remote; // BytecodeVerificationRemote setting
229 bool _has_platform_or_app_classes; // Archive contains app classes
230 char* _requested_base_address; // Archive relocation is not necessary if we map with this base address.
231 char* _mapped_base_address; // Actual base address where archive is mapped.
232
233 bool _allow_archiving_with_java_agent; // setting of the AllowArchivingWithJavaAgent option
234 bool _use_optimized_module_handling;// No module-relation VM options were specified, so we can skip
235 // some expensive operations.
236 bool _use_full_module_graph; // Can we use the full archived module graph?
237 size_t _ptrmap_size_in_bits; // Size of pointer relocation bitmap
238 narrowOop _heap_obj_roots; // An objArray that stores all the roots of archived heap objects
239 char* from_mapped_offset(size_t offset) const {
240 return mapped_base_address() + offset;
241 }
242 void set_mapped_offset(char* p, size_t *offset) {
243 assert(p >= mapped_base_address(), "sanity");
244 *offset = p - mapped_base_address();
245 }
246 public:
247 // Accessors -- fields declared in CDSFileMapHeaderBase
248 unsigned int magic() const {return _magic;}
249 int crc() const { return _crc; }
250 int version() const { return _version; }
251
252 void set_crc(int crc_value) { _crc = crc_value; }
253 void set_version(int v) { _version = v; }
254
255 // Accessors -- fields declared in FileMapHeader
256
257 size_t header_size() const { return _header_size; }
258 size_t alignment() const { return _alignment; }
259 int obj_alignment() const { return _obj_alignment; }
260 address narrow_oop_base() const { return _narrow_oop_base; }
261 int narrow_oop_shift() const { return _narrow_oop_shift; }
262 bool compact_strings() const { return _compact_strings; }
263 uintx max_heap_size() const { return _max_heap_size; }
264 CompressedOops::Mode narrow_oop_mode() const { return _narrow_oop_mode; }
265 int narrow_klass_shift() const { return _narrow_klass_shift; }
266 address narrow_klass_base() const { return (address)mapped_base_address(); }
267 char* cloned_vtables() const { return from_mapped_offset(_cloned_vtables_offset); }
268 char* serialized_data() const { return from_mapped_offset(_serialized_data_offset); }
269 address i2i_entry_code_buffers() const { return (address)from_mapped_offset(_i2i_entry_code_buffers_offset); }
270 size_t i2i_entry_code_buffers_size() const { return _i2i_entry_code_buffers_size; }
271 address heap_end() const { return _heap_end; }
272 bool base_archive_is_default() const { return _base_archive_is_default; }
273 const char* jvm_ident() const { return _jvm_ident; }
274 size_t base_archive_name_size() const { return _base_archive_name_size; }
275 char* requested_base_address() const { return _requested_base_address; }
276 char* mapped_base_address() const { return _mapped_base_address; }
277 bool has_platform_or_app_classes() const { return _has_platform_or_app_classes; }
278 size_t ptrmap_size_in_bits() const { return _ptrmap_size_in_bits; }
279 bool compressed_oops() const { return _compressed_oops; }
280 bool compressed_class_pointers() const { return _compressed_class_ptrs; }
281 // FIXME: These should really return int
282 jshort max_used_path_index() const { return _max_used_path_index; }
283 jshort app_module_paths_start_index() const { return _app_module_paths_start_index; }
284 jshort app_class_paths_start_index() const { return _app_class_paths_start_index; }
285 jshort num_module_paths() const { return _num_module_paths; }
286 narrowOop heap_obj_roots() const { return _heap_obj_roots; }
287
288 void set_has_platform_or_app_classes(bool v) { _has_platform_or_app_classes = v; }
289 void set_cloned_vtables(char* p) { set_mapped_offset(p, &_cloned_vtables_offset); }
290 void set_serialized_data(char* p) { set_mapped_offset(p, &_serialized_data_offset); }
291 void set_base_archive_name_size(size_t s) { _base_archive_name_size = s; }
292 void set_base_archive_is_default(bool b) { _base_archive_is_default = b; }
293 void set_header_size(size_t s) { _header_size = s; }
294 void set_ptrmap_size_in_bits(size_t s) { _ptrmap_size_in_bits = s; }
295 void set_mapped_base_address(char* p) { _mapped_base_address = p; }
296 void set_heap_obj_roots(narrowOop r) { _heap_obj_roots = r; }
297
298 void set_i2i_entry_code_buffers(address p, size_t s) {
299 set_mapped_offset((char*)p, &_i2i_entry_code_buffers_offset);
300 _i2i_entry_code_buffers_size = s;
301 }
302
303 void set_shared_path_table(SharedPathTable table) {
304 set_mapped_offset((char*)table.table(), &_shared_path_table_offset);
305 _shared_path_table_size = table.size();
306 }
307
308 void set_final_requested_base(char* b) {
309 _requested_base_address = b;
310 _mapped_base_address = 0;
311 }
312
313 SharedPathTable shared_path_table() const {
314 return SharedPathTable((Array<u8>*)from_mapped_offset(_shared_path_table_offset),
315 _shared_path_table_size);
316 }
317
318 bool validate();
319 int compute_crc();
320
321 FileMapRegion* space_at(int i) {
322 assert(is_valid_region(i), "invalid region");
323 return FileMapRegion::cast(&_space[i]);
324 }
325
326 void populate(FileMapInfo* info, size_t alignment);
327
328 static bool is_valid_region(int region) {
329 return (0 <= region && region < NUM_CDS_REGIONS);
330 }
331 };
332
333 class FileMapInfo : public CHeapObj<mtInternal> {
334 private:
335 friend class ManifestStream;
336 friend class VMStructs;
337 friend class CDSOffsets;
338 friend class FileMapHeader;
339
340 bool _is_static;
341 bool _file_open;
342 bool _is_mapped;
343 int _fd;
344 size_t _file_offset;
345 const char* _full_path;
346 const char* _base_archive_name;
347 FileMapHeader* _header;
348
349 // TODO: Probably change the following to be non-static
350 static SharedPathTable _shared_path_table;
351 static SharedPathTable _saved_shared_path_table;
352 static bool _validating_shared_path_table;
353
354 // FileMapHeader describes the shared space data in the file to be
355 // mapped. This structure gets written to a file. It is not a class, so
356 // that the compilers don't add any compiler-private data to it.
357
358 static FileMapInfo* _current_info;
359 static FileMapInfo* _dynamic_archive_info;
360 static bool _heap_pointers_need_patching;
361 static bool _memory_mapping_failed;
362 static GrowableArray<const char*>* _non_existent_class_paths;
363
364 FileMapHeader *header() const { return _header; }
365
366 public:
367 static bool get_base_archive_name_from_header(const char* archive_name,
368 int* size, char** base_archive_name);
369 static bool check_archive(const char* archive_name, bool is_static);
370 static SharedPathTable shared_path_table() {
371 return _shared_path_table;
372 }
373 static SharedPathTable saved_shared_path_table() {
374 return _saved_shared_path_table;
375 }
376
377 bool init_from_file(int fd);
378 static void metaspace_pointers_do(MetaspaceClosure* it, bool use_copy = true);
379
380 void log_paths(const char* msg, int start_idx, int end_idx);
381
382 FileMapInfo(bool is_static);
383 ~FileMapInfo();
384
385 // Accessors
386 int compute_header_crc() const { return header()->compute_crc(); }
387 void set_header_crc(int crc) { header()->set_crc(crc); }
388 int space_crc(int i) const { return space_at(i)->crc(); }
389 void populate_header(size_t alignment);
390 bool validate_header();
391 void invalidate();
392 int crc() const { return header()->crc(); }
393 int version() const { return header()->version(); }
394 size_t alignment() const { return header()->alignment(); }
395 address narrow_oop_base() const { return header()->narrow_oop_base(); }
396 int narrow_oop_shift() const { return header()->narrow_oop_shift(); }
397 uintx max_heap_size() const { return header()->max_heap_size(); }
398 address narrow_klass_base() const { return header()->narrow_klass_base(); }
399 int narrow_klass_shift() const { return header()->narrow_klass_shift(); }
400
401 CompressedOops::Mode narrow_oop_mode() const { return header()->narrow_oop_mode(); }
402 jshort app_module_paths_start_index() const { return header()->app_module_paths_start_index(); }
403 jshort app_class_paths_start_index() const { return header()->app_class_paths_start_index(); }
404
405 char* cloned_vtables() const { return header()->cloned_vtables(); }
406 void set_cloned_vtables(char* p) const { header()->set_cloned_vtables(p); }
407 char* serialized_data() const { return header()->serialized_data(); }
408 void set_serialized_data(char* p) const { header()->set_serialized_data(p); }
409
410 bool is_file_position_aligned() const;
411 void align_file_position();
412
413 address i2i_entry_code_buffers() const { return header()->i2i_entry_code_buffers(); }
414 size_t i2i_entry_code_buffers_size() const { return header()->i2i_entry_code_buffers_size(); }
415 void set_i2i_entry_code_buffers(address addr, size_t s) const {
416 header()->set_i2i_entry_code_buffers(addr, s);
417 }
418
419 bool is_static() const { return _is_static; }
420 bool is_mapped() const { return _is_mapped; }
421 void set_is_mapped(bool v) { _is_mapped = v; }
422 const char* full_path() const { return _full_path; }
423 void set_final_requested_base(char* b);
424
425 char* requested_base_address() const { return header()->requested_base_address(); }
426
427
428 class DynamicArchiveHeader* dynamic_header() const {
429 assert(!is_static(), "must be");
430 return (DynamicArchiveHeader*)header();
431 }
432
433 void set_has_platform_or_app_classes(bool v) {
434 header()->set_has_platform_or_app_classes(v);
435 }
436 bool has_platform_or_app_classes() const {
437 return header()->has_platform_or_app_classes();
438 }
439
440 static FileMapInfo* current_info() {
441 CDS_ONLY(return _current_info;)
442 NOT_CDS(return NULL;)
443 }
444
445 static void set_current_info(FileMapInfo* info) {
446 CDS_ONLY(_current_info = info;)
447 }
448
449 static FileMapInfo* dynamic_info() {
450 CDS_ONLY(return _dynamic_archive_info;)
451 NOT_CDS(return NULL;)
452 }
453
454 static void assert_mark(bool check);
455
456 // File manipulation.
457 bool initialize() NOT_CDS_RETURN_(false);
458 bool open_for_read();
459 void open_for_write(const char* path = NULL);
460 void write_header();
461 void write_region(int region, char* base, size_t size,
462 bool read_only, bool allow_exec);
463 void write_bitmap_region(const CHeapBitMap* ptrmap,
464 GrowableArray<ArchiveHeapOopmapInfo>* closed_oopmaps,
465 GrowableArray<ArchiveHeapOopmapInfo>* open_oopmaps);
466 size_t write_archive_heap_regions(GrowableArray<MemRegion> *heap_mem,
467 GrowableArray<ArchiveHeapOopmapInfo> *oopmaps,
468 int first_region_id, int max_num_regions);
469 void write_bytes(const void* buffer, size_t count);
470 void write_bytes_aligned(const void* buffer, size_t count);
471 size_t read_bytes(void* buffer, size_t count);
472 MapArchiveResult map_regions(int regions[], int num_regions, char* mapped_base_address, ReservedSpace rs);
473 void unmap_regions(int regions[], int num_regions);
474 void map_heap_regions() NOT_CDS_JAVA_HEAP_RETURN;
475 void fixup_mapped_heap_regions() NOT_CDS_JAVA_HEAP_RETURN;
476 void patch_archived_heap_embedded_pointers() NOT_CDS_JAVA_HEAP_RETURN;
477 void patch_archived_heap_embedded_pointers(MemRegion* ranges, int num_ranges,
478 int first_region_idx) NOT_CDS_JAVA_HEAP_RETURN;
479 bool has_heap_regions() NOT_CDS_JAVA_HEAP_RETURN_(false);
480 MemRegion get_heap_regions_range_with_current_oop_encoding_mode() NOT_CDS_JAVA_HEAP_RETURN_(MemRegion());
481 void unmap_region(int i);
482 bool verify_region_checksum(int i);
483 void close();
484 bool is_open() { return _file_open; }
485 ReservedSpace reserve_shared_memory();
486
487 // JVM/TI RedefineClasses() support:
488 // Remap the shared readonly space to shared readwrite, private.
489 bool remap_shared_readonly_as_readwrite();
490
491 // Errors.
492 static void fail_stop(const char *msg, ...) ATTRIBUTE_PRINTF(1, 2);
493 static void fail_continue(const char *msg, ...) ATTRIBUTE_PRINTF(1, 2);
494 static bool memory_mapping_failed() {
495 CDS_ONLY(return _memory_mapping_failed;)
496 NOT_CDS(return false;)
497 }
498 bool is_in_shared_region(const void* p, int idx) NOT_CDS_RETURN_(false);
499
500 // Stop CDS sharing and unmap CDS regions.
501 static void stop_sharing_and_unmap(const char* msg);
502
503 static void allocate_shared_path_table();
504 static void copy_shared_path_table(ClassLoaderData* loader_data, Thread* THREAD);
505 static int add_shared_classpaths(int i, const char* which, ClassPathEntry *cpe, TRAPS);
506 static void check_nonempty_dir_in_shared_path_table();
507 bool validate_shared_path_table();
508 void validate_non_existent_class_paths();
509 static void set_shared_path_table(FileMapInfo* info) {
510 _shared_path_table = info->header()->shared_path_table();
511 }
512 static void update_jar_manifest(ClassPathEntry *cpe, SharedClassPathEntry* ent, TRAPS);
513 static int num_non_existent_class_paths();
514 static void record_non_existent_class_path_entry(const char* path);
515
516 #if INCLUDE_JVMTI
517 static ClassFileStream* open_stream_for_jvmti(InstanceKlass* ik, Handle class_loader, TRAPS);
518 #endif
519
520 static SharedClassPathEntry* shared_path(int index) {
521 return _shared_path_table.path_at(index);
522 }
523
524 static const char* shared_path_name(int index) {
525 assert(index >= 0, "Sanity");
526 return shared_path(index)->name();
527 }
528
529 static int get_number_of_shared_paths() {
530 return _shared_path_table.size();
531 }
532
533 static int get_module_shared_path_index(Symbol* location) NOT_CDS_RETURN_(-1);
534
535 char* region_addr(int idx);
536
537 // The offset of the first core region in the archive, relative to SharedBaseAddress
538 size_t mapping_base_offset() const { return first_core_space()->mapping_offset(); }
539 // The offset of the (exclusive) end of the last core region in this archive, relative to SharedBaseAddress
540 size_t mapping_end_offset() const { return last_core_space()->mapping_end_offset(); }
541
542 char* mapped_base() const { return first_core_space()->mapped_base(); }
543 char* mapped_end() const { return last_core_space()->mapped_end(); }
544
545 // Non-zero if the archive needs to be mapped a non-default location due to ASLR.
546 intx relocation_delta() const {
547 return header()->mapped_base_address() - header()->requested_base_address();
548 }
549
550 FileMapRegion* first_core_space() const;
551 FileMapRegion* last_core_space() const;
552
553 FileMapRegion* space_at(int i) const {
554 return header()->space_at(i);
555 }
556
557 private:
558 void seek_to_position(size_t pos);
559 char* skip_first_path_entry(const char* path) NOT_CDS_RETURN_(NULL);
560 int num_paths(const char* path) NOT_CDS_RETURN_(0);
561 GrowableArray<const char*>* create_path_array(const char* path) NOT_CDS_RETURN_(NULL);
562 bool classpath_failure(const char* msg, const char* name) NOT_CDS_RETURN_(false);
563 bool check_paths(int shared_path_start_idx, int num_paths,
564 GrowableArray<const char*>* rp_array) NOT_CDS_RETURN_(false);
565 bool validate_boot_class_paths() NOT_CDS_RETURN_(false);
566 bool validate_app_class_paths(int shared_app_paths_len) NOT_CDS_RETURN_(false);
567 bool map_heap_data(MemRegion **heap_mem, int first, int max, int* num,
568 bool is_open = false) NOT_CDS_JAVA_HEAP_RETURN_(false);
569 bool region_crc_check(char* buf, size_t size, int expected_crc) NOT_CDS_RETURN_(false);
570 void dealloc_archive_heap_regions(MemRegion* regions, int num) NOT_CDS_JAVA_HEAP_RETURN;
571 void map_heap_regions_impl() NOT_CDS_JAVA_HEAP_RETURN;
572 char* map_bitmap_region();
573 MapArchiveResult map_region(int i, intx addr_delta, char* mapped_base_address, ReservedSpace rs);
574 bool read_region(int i, char* base, size_t size);
575 bool relocate_pointers(intx addr_delta);
576 static size_t set_oopmaps_offset(GrowableArray<ArchiveHeapOopmapInfo> *oopmaps, size_t curr_size);
577 static size_t write_oopmaps(GrowableArray<ArchiveHeapOopmapInfo> *oopmaps, size_t curr_offset, uintptr_t* buffer);
578
579 // The starting address of spc, as calculated with CompressedOop::decode_non_null()
580 address start_address_as_decoded_with_current_oop_encoding_mode(FileMapRegion* spc) {
581 return decode_start_address(spc, true);
582 }
583
584 // The starting address of spc, as calculated with HeapShared::decode_from_archive()
585 address start_address_as_decoded_from_archive(FileMapRegion* spc) {
586 return decode_start_address(spc, false);
587 }
588
589 address decode_start_address(FileMapRegion* spc, bool with_current_oop_encoding_mode);
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_MEMORY_FILEMAP_HPP