1 /*
2 * Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/archiveBuilder.hpp"
27 #include "cds/archiveUtils.hpp"
28 #include "cds/cppVtables.hpp"
29 #include "cds/dumpAllocStats.hpp"
30 #include "cds/metaspaceShared.hpp"
31 #include "classfile/classLoaderDataShared.hpp"
32 #include "classfile/symbolTable.hpp"
33 #include "classfile/systemDictionaryShared.hpp"
34 #include "classfile/vmClasses.hpp"
35 #include "interpreter/abstractInterpreter.hpp"
36 #include "logging/log.hpp"
37 #include "logging/logStream.hpp"
38 #include "memory/allStatic.hpp"
39 #include "memory/memRegion.hpp"
40 #include "memory/resourceArea.hpp"
41 #include "oops/instanceKlass.hpp"
42 #include "oops/klass.inline.hpp"
43 #include "oops/objArrayKlass.hpp"
44 #include "oops/oopHandle.inline.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/globals_extension.hpp"
47 #include "runtime/sharedRuntime.hpp"
48 #include "runtime/thread.hpp"
49 #include "utilities/align.hpp"
50 #include "utilities/bitMap.inline.hpp"
51 #include "utilities/formatBuffer.hpp"
52 #include "utilities/hashtable.inline.hpp"
53
54 ArchiveBuilder* ArchiveBuilder::_current = NULL;
55
56 ArchiveBuilder::OtherROAllocMark::~OtherROAllocMark() {
57 char* newtop = ArchiveBuilder::current()->_ro_region.top();
58 ArchiveBuilder::alloc_stats()->record_other_type(int(newtop - _oldtop), true);
59 }
60
61 ArchiveBuilder::SourceObjList::SourceObjList() : _ptrmap(16 * K) {
62 _total_bytes = 0;
63 _objs = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<SourceObjInfo*>(128 * K, mtClassShared);
64 }
65
66 ArchiveBuilder::SourceObjList::~SourceObjList() {
67 delete _objs;
68 }
69
70 void ArchiveBuilder::SourceObjList::append(MetaspaceClosure::Ref* enclosing_ref, SourceObjInfo* src_info) {
71 // Save this source object for copying
72 _objs->append(src_info);
73
74 // Prepare for marking the pointers in this source object
75 assert(is_aligned(_total_bytes, sizeof(address)), "must be");
76 src_info->set_ptrmap_start(_total_bytes / sizeof(address));
77 _total_bytes = align_up(_total_bytes + (uintx)src_info->size_in_bytes(), sizeof(address));
78 src_info->set_ptrmap_end(_total_bytes / sizeof(address));
79
80 BitMap::idx_t bitmap_size_needed = BitMap::idx_t(src_info->ptrmap_end());
81 if (_ptrmap.size() <= bitmap_size_needed) {
82 _ptrmap.resize((bitmap_size_needed + 1) * 2);
83 }
84 }
85
86 void ArchiveBuilder::SourceObjList::remember_embedded_pointer(SourceObjInfo* src_info, MetaspaceClosure::Ref* ref) {
87 // src_obj contains a pointer. Remember the location of this pointer in _ptrmap,
88 // so that we can copy/relocate it later. E.g., if we have
89 // class Foo { intx scala; Bar* ptr; }
90 // Foo *f = 0x100;
91 // To mark the f->ptr pointer on 64-bit platform, this function is called with
92 // src_info()->obj() == 0x100
93 // ref->addr() == 0x108
94 address src_obj = src_info->obj();
95 address* field_addr = ref->addr();
96 assert(src_info->ptrmap_start() < _total_bytes, "sanity");
97 assert(src_info->ptrmap_end() <= _total_bytes, "sanity");
98 assert(*field_addr != NULL, "should have checked");
99
100 intx field_offset_in_bytes = ((address)field_addr) - src_obj;
101 DEBUG_ONLY(int src_obj_size = src_info->size_in_bytes();)
102 assert(field_offset_in_bytes >= 0, "must be");
103 assert(field_offset_in_bytes + intx(sizeof(intptr_t)) <= intx(src_obj_size), "must be");
104 assert(is_aligned(field_offset_in_bytes, sizeof(address)), "must be");
105
106 BitMap::idx_t idx = BitMap::idx_t(src_info->ptrmap_start() + (uintx)(field_offset_in_bytes / sizeof(address)));
107 _ptrmap.set_bit(BitMap::idx_t(idx));
108 }
109
110 class RelocateEmbeddedPointers : public BitMapClosure {
111 ArchiveBuilder* _builder;
112 address _dumped_obj;
113 BitMap::idx_t _start_idx;
114 public:
115 RelocateEmbeddedPointers(ArchiveBuilder* builder, address dumped_obj, BitMap::idx_t start_idx) :
116 _builder(builder), _dumped_obj(dumped_obj), _start_idx(start_idx) {}
117
118 bool do_bit(BitMap::idx_t bit_offset) {
119 size_t field_offset = size_t(bit_offset - _start_idx) * sizeof(address);
120 address* ptr_loc = (address*)(_dumped_obj + field_offset);
121
122 address old_p = *ptr_loc;
123 address new_p = _builder->get_dumped_addr(old_p);
124
125 log_trace(cds)("Ref: [" PTR_FORMAT "] -> " PTR_FORMAT " => " PTR_FORMAT,
126 p2i(ptr_loc), p2i(old_p), p2i(new_p));
127
128 ArchivePtrMarker::set_and_mark_pointer(ptr_loc, new_p);
129 return true; // keep iterating the bitmap
130 }
131 };
132
133 void ArchiveBuilder::SourceObjList::relocate(int i, ArchiveBuilder* builder) {
134 SourceObjInfo* src_info = objs()->at(i);
135 assert(src_info->should_copy(), "must be");
136 BitMap::idx_t start = BitMap::idx_t(src_info->ptrmap_start()); // inclusive
137 BitMap::idx_t end = BitMap::idx_t(src_info->ptrmap_end()); // exclusive
138
139 RelocateEmbeddedPointers relocator(builder, src_info->dumped_addr(), start);
140 _ptrmap.iterate(&relocator, start, end);
141 }
142
143 ArchiveBuilder::ArchiveBuilder() :
144 _current_dump_space(NULL),
145 _buffer_bottom(NULL),
146 _last_verified_top(NULL),
147 _num_dump_regions_used(0),
148 _other_region_used_bytes(0),
149 _requested_static_archive_bottom(NULL),
150 _requested_static_archive_top(NULL),
151 _requested_dynamic_archive_bottom(NULL),
152 _requested_dynamic_archive_top(NULL),
153 _mapped_static_archive_bottom(NULL),
154 _mapped_static_archive_top(NULL),
155 _buffer_to_requested_delta(0),
156 _rw_region("rw", MAX_SHARED_DELTA),
157 _ro_region("ro", MAX_SHARED_DELTA),
158 _rw_src_objs(),
159 _ro_src_objs(),
160 _src_obj_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE),
161 _total_closed_heap_region_size(0),
162 _total_open_heap_region_size(0),
163 _estimated_metaspaceobj_bytes(0),
164 _estimated_hashtable_bytes(0)
165 {
166 _klasses = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<Klass*>(4 * K, mtClassShared);
167 _symbols = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<Symbol*>(256 * K, mtClassShared);
168 _special_refs = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<SpecialRefInfo>(24 * K, mtClassShared);
169
170 assert(_current == NULL, "must be");
171 _current = this;
172 }
173
174 ArchiveBuilder::~ArchiveBuilder() {
175 assert(_current == this, "must be");
176 _current = NULL;
177
178 clean_up_src_obj_table();
179
180 for (int i = 0; i < _symbols->length(); i++) {
181 _symbols->at(i)->decrement_refcount();
182 }
183
184 delete _klasses;
185 delete _symbols;
186 delete _special_refs;
187 if (_shared_rs.is_reserved()) {
188 _shared_rs.release();
189 }
190 }
191
192 bool ArchiveBuilder::is_dumping_full_module_graph() {
193 return DumpSharedSpaces && MetaspaceShared::use_full_module_graph();
194 }
195
196 class GatherKlassesAndSymbols : public UniqueMetaspaceClosure {
197 ArchiveBuilder* _builder;
198
199 public:
200 GatherKlassesAndSymbols(ArchiveBuilder* builder) : _builder(builder) {}
201
202 virtual bool do_unique_ref(Ref* ref, bool read_only) {
203 return _builder->gather_klass_and_symbol(ref, read_only);
204 }
205 };
206
207 bool ArchiveBuilder::gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only) {
208 if (ref->obj() == NULL) {
209 return false;
210 }
211 if (get_follow_mode(ref) != make_a_copy) {
212 return false;
213 }
214 if (ref->msotype() == MetaspaceObj::ClassType) {
215 Klass* klass = (Klass*)ref->obj();
216 assert(klass->is_klass(), "must be");
217 if (!is_excluded(klass)) {
218 _klasses->append(klass);
219 }
220 // See RunTimeClassInfo::get_for()
221 _estimated_metaspaceobj_bytes += align_up(BytesPerWord, SharedSpaceObjectAlignment);
222 } else if (ref->msotype() == MetaspaceObj::SymbolType) {
223 // Make sure the symbol won't be GC'ed while we are dumping the archive.
224 Symbol* sym = (Symbol*)ref->obj();
225 sym->increment_refcount();
226 _symbols->append(sym);
227 }
228
229 int bytes = ref->size() * BytesPerWord;
230 _estimated_metaspaceobj_bytes += align_up(bytes, SharedSpaceObjectAlignment);
231
232 return true; // recurse
233 }
234
235 void ArchiveBuilder::gather_klasses_and_symbols() {
236 ResourceMark rm;
237 log_info(cds)("Gathering classes and symbols ... ");
238 GatherKlassesAndSymbols doit(this);
239 iterate_roots(&doit, /*is_relocating_pointers=*/false);
240 #if INCLUDE_CDS_JAVA_HEAP
241 if (is_dumping_full_module_graph()) {
242 ClassLoaderDataShared::iterate_symbols(&doit);
243 }
244 #endif
245 doit.finish();
246
247 if (DumpSharedSpaces) {
248 // To ensure deterministic contents in the static archive, we need to ensure that
249 // we iterate the MetaspaceObjs in a deterministic order. It doesn't matter where
250 // the MetaspaceObjs are located originally, as they are copied sequentially into
251 // the archive during the iteration.
252 //
253 // The only issue here is that the symbol table and the system directories may be
254 // randomly ordered, so we copy the symbols and klasses into two arrays and sort
255 // them deterministically.
256 //
257 // During -Xshare:dump, the order of Symbol creation is strictly determined by
258 // the SharedClassListFile (class loading is done in a single thread and the JIT
259 // is disabled). Also, Symbols are allocated in monotonically increasing addresses
260 // (see Symbol::operator new(size_t, int)). So if we iterate the Symbols by
261 // ascending address order, we ensure that all Symbols are copied into deterministic
262 // locations in the archive.
263 //
264 // TODO: in the future, if we want to produce deterministic contents in the
265 // dynamic archive, we might need to sort the symbols alphabetically (also see
266 // DynamicArchiveBuilder::sort_methods()).
267 sort_symbols_and_fix_hash();
268 sort_klasses();
269
270 // TODO -- we need a proper estimate for the archived modules, etc,
271 // but this should be enough for now
272 _estimated_metaspaceobj_bytes += 200 * 1024 * 1024;
273 }
274 }
275
276 int ArchiveBuilder::compare_symbols_by_address(Symbol** a, Symbol** b) {
277 if (a[0] < b[0]) {
278 return -1;
279 } else {
280 assert(a[0] > b[0], "Duplicated symbol %s unexpected", (*a)->as_C_string());
281 return 1;
282 }
283 }
284
285 void ArchiveBuilder::sort_symbols_and_fix_hash() {
286 log_info(cds)("Sorting symbols and fixing identity hash ... ");
287 os::init_random(0x12345678);
288 _symbols->sort(compare_symbols_by_address);
289 for (int i = 0; i < _symbols->length(); i++) {
290 assert(_symbols->at(i)->is_permanent(), "archived symbols must be permanent");
291 _symbols->at(i)->update_identity_hash();
292 }
293 }
294
295 int ArchiveBuilder::compare_klass_by_name(Klass** a, Klass** b) {
296 return a[0]->name()->fast_compare(b[0]->name());
297 }
298
299 void ArchiveBuilder::sort_klasses() {
300 log_info(cds)("Sorting classes ... ");
301 _klasses->sort(compare_klass_by_name);
302 }
303
304 size_t ArchiveBuilder::estimate_archive_size() {
305 // size of the symbol table and two dictionaries, plus the RunTimeClassInfo's
306 size_t symbol_table_est = SymbolTable::estimate_size_for_archive();
307 size_t dictionary_est = SystemDictionaryShared::estimate_size_for_archive();
308 _estimated_hashtable_bytes = symbol_table_est + dictionary_est;
309
310 size_t total = 0;
311
312 total += _estimated_metaspaceobj_bytes;
313 total += _estimated_hashtable_bytes;
314
315 // allow fragmentation at the end of each dump region
316 total += _total_dump_regions * MetaspaceShared::core_region_alignment();
317
318 log_info(cds)("_estimated_hashtable_bytes = " SIZE_FORMAT " + " SIZE_FORMAT " = " SIZE_FORMAT,
319 symbol_table_est, dictionary_est, _estimated_hashtable_bytes);
320 log_info(cds)("_estimated_metaspaceobj_bytes = " SIZE_FORMAT, _estimated_metaspaceobj_bytes);
321 log_info(cds)("total estimate bytes = " SIZE_FORMAT, total);
322
323 return align_up(total, MetaspaceShared::core_region_alignment());
324 }
325
326 address ArchiveBuilder::reserve_buffer() {
327 size_t buffer_size = estimate_archive_size();
328 ReservedSpace rs(buffer_size, MetaspaceShared::core_region_alignment(), os::vm_page_size());
329 if (!rs.is_reserved()) {
330 log_error(cds)("Failed to reserve " SIZE_FORMAT " bytes of output buffer.", buffer_size);
331 vm_direct_exit(0);
332 }
333
334 // buffer_bottom is the lowest address of the 2 core regions (rw, ro) when
335 // we are copying the class metadata into the buffer.
336 address buffer_bottom = (address)rs.base();
337 log_info(cds)("Reserved output buffer space at " PTR_FORMAT " [" SIZE_FORMAT " bytes]",
338 p2i(buffer_bottom), buffer_size);
339 _shared_rs = rs;
340
341 _buffer_bottom = buffer_bottom;
342 _last_verified_top = buffer_bottom;
343 _current_dump_space = &_rw_region;
344 _num_dump_regions_used = 1;
345 _other_region_used_bytes = 0;
346 _current_dump_space->init(&_shared_rs, &_shared_vs);
347
348 ArchivePtrMarker::initialize(&_ptrmap, &_shared_vs);
349
350 // The bottom of the static archive should be mapped at this address by default.
351 _requested_static_archive_bottom = (address)MetaspaceShared::requested_base_address();
352
353 // The bottom of the archive (that I am writing now) should be mapped at this address by default.
354 address my_archive_requested_bottom;
355
356 if (DumpSharedSpaces) {
357 my_archive_requested_bottom = _requested_static_archive_bottom;
358 } else {
359 _mapped_static_archive_bottom = (address)MetaspaceObj::shared_metaspace_base();
360 _mapped_static_archive_top = (address)MetaspaceObj::shared_metaspace_top();
361 assert(_mapped_static_archive_top >= _mapped_static_archive_bottom, "must be");
362 size_t static_archive_size = _mapped_static_archive_top - _mapped_static_archive_bottom;
363
364 // At run time, we will mmap the dynamic archive at my_archive_requested_bottom
365 _requested_static_archive_top = _requested_static_archive_bottom + static_archive_size;
366 my_archive_requested_bottom = align_up(_requested_static_archive_top, MetaspaceShared::core_region_alignment());
367
368 _requested_dynamic_archive_bottom = my_archive_requested_bottom;
369 }
370
371 _buffer_to_requested_delta = my_archive_requested_bottom - _buffer_bottom;
372
373 address my_archive_requested_top = my_archive_requested_bottom + buffer_size;
374 if (my_archive_requested_bottom < _requested_static_archive_bottom ||
375 my_archive_requested_top <= _requested_static_archive_bottom) {
376 // Size overflow.
377 log_error(cds)("my_archive_requested_bottom = " INTPTR_FORMAT, p2i(my_archive_requested_bottom));
378 log_error(cds)("my_archive_requested_top = " INTPTR_FORMAT, p2i(my_archive_requested_top));
379 log_error(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is too high. "
380 "Please rerun java -Xshare:dump with a lower value", p2i(_requested_static_archive_bottom));
381 vm_direct_exit(0);
382 }
383
384 if (DumpSharedSpaces) {
385 // We don't want any valid object to be at the very bottom of the archive.
386 // See ArchivePtrMarker::mark_pointer().
387 rw_region()->allocate(16);
388 }
389
390 return buffer_bottom;
391 }
392
393 void ArchiveBuilder::iterate_sorted_roots(MetaspaceClosure* it, bool is_relocating_pointers) {
394 int i;
395
396 if (!is_relocating_pointers) {
397 // Don't relocate _symbol, so we can safely call decrement_refcount on the
398 // original symbols.
399 int num_symbols = _symbols->length();
400 for (i = 0; i < num_symbols; i++) {
401 it->push(_symbols->adr_at(i));
402 }
403 }
404
405 int num_klasses = _klasses->length();
406 for (i = 0; i < num_klasses; i++) {
407 it->push(_klasses->adr_at(i));
408 }
409
410 iterate_roots(it, is_relocating_pointers);
411 }
412
413 class GatherSortedSourceObjs : public MetaspaceClosure {
414 ArchiveBuilder* _builder;
415
416 public:
417 GatherSortedSourceObjs(ArchiveBuilder* builder) : _builder(builder) {}
418
419 virtual bool do_ref(Ref* ref, bool read_only) {
420 return _builder->gather_one_source_obj(enclosing_ref(), ref, read_only);
421 }
422
423 virtual void push_special(SpecialRef type, Ref* ref, intptr_t* p) {
424 assert(type == _method_entry_ref, "only special type allowed for now");
425 address src_obj = ref->obj();
426 size_t field_offset = pointer_delta(p, src_obj, sizeof(u1));
427 _builder->add_special_ref(type, src_obj, field_offset);
428 };
429
430 virtual void do_pending_ref(Ref* ref) {
431 if (ref->obj() != NULL) {
432 _builder->remember_embedded_pointer_in_copied_obj(enclosing_ref(), ref);
433 }
434 }
435 };
436
437 bool ArchiveBuilder::gather_one_source_obj(MetaspaceClosure::Ref* enclosing_ref,
438 MetaspaceClosure::Ref* ref, bool read_only) {
439 address src_obj = ref->obj();
440 if (src_obj == NULL) {
441 return false;
442 }
443 ref->set_keep_after_pushing();
444 remember_embedded_pointer_in_copied_obj(enclosing_ref, ref);
445
446 FollowMode follow_mode = get_follow_mode(ref);
447 SourceObjInfo src_info(ref, read_only, follow_mode);
448 bool created;
449 SourceObjInfo* p = _src_obj_table.put_if_absent(src_obj, src_info, &created);
450 if (created) {
451 if (_src_obj_table.maybe_grow()) {
452 log_info(cds, hashtables)("Expanded _src_obj_table table to %d", _src_obj_table.table_size());
453 }
454 }
455
456 assert(p->read_only() == src_info.read_only(), "must be");
457
458 if (created && src_info.should_copy()) {
459 ref->set_user_data((void*)p);
460 if (read_only) {
461 _ro_src_objs.append(enclosing_ref, p);
462 } else {
463 _rw_src_objs.append(enclosing_ref, p);
464 }
465 return true; // Need to recurse into this ref only if we are copying it
466 } else {
467 return false;
468 }
469 }
470
471 void ArchiveBuilder::add_special_ref(MetaspaceClosure::SpecialRef type, address src_obj, size_t field_offset) {
472 _special_refs->append(SpecialRefInfo(type, src_obj, field_offset));
473 }
474
475 void ArchiveBuilder::remember_embedded_pointer_in_copied_obj(MetaspaceClosure::Ref* enclosing_ref,
476 MetaspaceClosure::Ref* ref) {
477 assert(ref->obj() != NULL, "should have checked");
478
479 if (enclosing_ref != NULL) {
480 SourceObjInfo* src_info = (SourceObjInfo*)enclosing_ref->user_data();
481 if (src_info == NULL) {
482 // source objects of point_to_it/set_to_null types are not copied
483 // so we don't need to remember their pointers.
484 } else {
485 if (src_info->read_only()) {
486 _ro_src_objs.remember_embedded_pointer(src_info, ref);
487 } else {
488 _rw_src_objs.remember_embedded_pointer(src_info, ref);
489 }
490 }
491 }
492 }
493
494 void ArchiveBuilder::gather_source_objs() {
495 ResourceMark rm;
496 log_info(cds)("Gathering all archivable objects ... ");
497 gather_klasses_and_symbols();
498 GatherSortedSourceObjs doit(this);
499 iterate_sorted_roots(&doit, /*is_relocating_pointers=*/false);
500 doit.finish();
501 }
502
503 bool ArchiveBuilder::is_excluded(Klass* klass) {
504 if (klass->is_instance_klass()) {
505 InstanceKlass* ik = InstanceKlass::cast(klass);
506 return SystemDictionaryShared::is_excluded_class(ik);
507 } else if (klass->is_objArray_klass()) {
508 if (DynamicDumpSharedSpaces) {
509 // Don't support archiving of array klasses for now (WHY???)
510 return true;
511 }
512 Klass* bottom = ObjArrayKlass::cast(klass)->bottom_klass();
513 if (bottom->is_instance_klass()) {
514 return SystemDictionaryShared::is_excluded_class(InstanceKlass::cast(bottom));
515 }
516 }
517
518 return false;
519 }
520
521 ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref *ref) {
522 address obj = ref->obj();
523 if (MetaspaceShared::is_in_shared_metaspace(obj)) {
524 // Don't dump existing shared metadata again.
525 return point_to_it;
526 } else if (ref->msotype() == MetaspaceObj::MethodDataType) {
527 return set_to_null;
528 } else {
529 if (ref->msotype() == MetaspaceObj::ClassType) {
530 Klass* klass = (Klass*)ref->obj();
531 assert(klass->is_klass(), "must be");
532 if (is_excluded(klass)) {
533 ResourceMark rm;
534 log_debug(cds, dynamic)("Skipping class (excluded): %s", klass->external_name());
535 return set_to_null;
536 }
537 }
538
539 return make_a_copy;
540 }
541 }
542
543 void ArchiveBuilder::start_dump_space(DumpRegion* next) {
544 address bottom = _last_verified_top;
545 address top = (address)(current_dump_space()->top());
546 _other_region_used_bytes += size_t(top - bottom);
547
548 current_dump_space()->pack(next);
549 _current_dump_space = next;
550 _num_dump_regions_used ++;
551
552 _last_verified_top = (address)(current_dump_space()->top());
553 }
554
555 void ArchiveBuilder::verify_estimate_size(size_t estimate, const char* which) {
556 address bottom = _last_verified_top;
557 address top = (address)(current_dump_space()->top());
558 size_t used = size_t(top - bottom) + _other_region_used_bytes;
559 int diff = int(estimate) - int(used);
560
561 log_info(cds)("%s estimate = " SIZE_FORMAT " used = " SIZE_FORMAT "; diff = %d bytes", which, estimate, used, diff);
562 assert(diff >= 0, "Estimate is too small");
563
564 _last_verified_top = top;
565 _other_region_used_bytes = 0;
566 }
567
568 void ArchiveBuilder::dump_rw_metadata() {
569 ResourceMark rm;
570 log_info(cds)("Allocating RW objects ... ");
571 make_shallow_copies(&_rw_region, &_rw_src_objs);
572
573 #if INCLUDE_CDS_JAVA_HEAP
574 if (is_dumping_full_module_graph()) {
575 // Archive the ModuleEntry's and PackageEntry's of the 3 built-in loaders
576 char* start = rw_region()->top();
577 ClassLoaderDataShared::allocate_archived_tables();
578 alloc_stats()->record_modules(rw_region()->top() - start, /*read_only*/false);
579 }
580 #endif
581 }
582
583 void ArchiveBuilder::dump_ro_metadata() {
584 ResourceMark rm;
585 log_info(cds)("Allocating RO objects ... ");
586
587 start_dump_space(&_ro_region);
588 make_shallow_copies(&_ro_region, &_ro_src_objs);
589
590 #if INCLUDE_CDS_JAVA_HEAP
591 if (is_dumping_full_module_graph()) {
592 char* start = ro_region()->top();
593 ClassLoaderDataShared::init_archived_tables();
594 alloc_stats()->record_modules(ro_region()->top() - start, /*read_only*/true);
595 }
596 #endif
597 }
598
599 void ArchiveBuilder::make_shallow_copies(DumpRegion *dump_region,
600 const ArchiveBuilder::SourceObjList* src_objs) {
601 for (int i = 0; i < src_objs->objs()->length(); i++) {
602 make_shallow_copy(dump_region, src_objs->objs()->at(i));
603 }
604 log_info(cds)("done (%d objects)", src_objs->objs()->length());
605 }
606
607 void ArchiveBuilder::make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info) {
608 MetaspaceClosure::Ref* ref = src_info->ref();
609 address src = ref->obj();
610 int bytes = src_info->size_in_bytes();
611 char* dest;
612 char* oldtop;
613 char* newtop;
614
615 oldtop = dump_region->top();
616 if (ref->msotype() == MetaspaceObj::ClassType) {
617 // Save a pointer immediate in front of an InstanceKlass, so
618 // we can do a quick lookup from InstanceKlass* -> RunTimeClassInfo*
619 // without building another hashtable. See RunTimeClassInfo::get_for()
620 // in systemDictionaryShared.cpp.
621 Klass* klass = (Klass*)src;
622 if (klass->is_instance_klass()) {
623 SystemDictionaryShared::validate_before_archiving(InstanceKlass::cast(klass));
624 dump_region->allocate(sizeof(address));
625 }
626 }
627 dest = dump_region->allocate(bytes);
628 newtop = dump_region->top();
629
630 memcpy(dest, src, bytes);
631
632 intptr_t* archived_vtable = CppVtables::get_archived_vtable(ref->msotype(), (address)dest);
633 if (archived_vtable != NULL) {
634 *(address*)dest = (address)archived_vtable;
635 ArchivePtrMarker::mark_pointer((address*)dest);
636 }
637
638 log_trace(cds)("Copy: " PTR_FORMAT " ==> " PTR_FORMAT " %d", p2i(src), p2i(dest), bytes);
639 src_info->set_dumped_addr((address)dest);
640
641 _alloc_stats.record(ref->msotype(), int(newtop - oldtop), src_info->read_only());
642 }
643
644 address ArchiveBuilder::get_dumped_addr(address src_obj) const {
645 SourceObjInfo* p = _src_obj_table.get(src_obj);
646 assert(p != NULL, "must be");
647
648 return p->dumped_addr();
649 }
650
651 void ArchiveBuilder::relocate_embedded_pointers(ArchiveBuilder::SourceObjList* src_objs) {
652 for (int i = 0; i < src_objs->objs()->length(); i++) {
653 src_objs->relocate(i, this);
654 }
655 }
656
657 void ArchiveBuilder::update_special_refs() {
658 for (int i = 0; i < _special_refs->length(); i++) {
659 SpecialRefInfo s = _special_refs->at(i);
660 size_t field_offset = s.field_offset();
661 address src_obj = s.src_obj();
662 address dst_obj = get_dumped_addr(src_obj);
663 intptr_t* src_p = (intptr_t*)(src_obj + field_offset);
664 intptr_t* dst_p = (intptr_t*)(dst_obj + field_offset);
665 assert(s.type() == MetaspaceClosure::_method_entry_ref, "only special type allowed for now");
666
667 assert(*src_p == *dst_p, "must be a copy");
668 ArchivePtrMarker::mark_pointer((address*)dst_p);
669 }
670 }
671
672 class RefRelocator: public MetaspaceClosure {
673 ArchiveBuilder* _builder;
674
675 public:
676 RefRelocator(ArchiveBuilder* builder) : _builder(builder) {}
677
678 virtual bool do_ref(Ref* ref, bool read_only) {
679 if (ref->not_null()) {
680 ref->update(_builder->get_dumped_addr(ref->obj()));
681 ArchivePtrMarker::mark_pointer(ref->addr());
682 }
683 return false; // Do not recurse.
684 }
685 };
686
687 void ArchiveBuilder::relocate_roots() {
688 log_info(cds)("Relocating external roots ... ");
689 ResourceMark rm;
690 RefRelocator doit(this);
691 iterate_sorted_roots(&doit, /*is_relocating_pointers=*/true);
692 doit.finish();
693 log_info(cds)("done");
694 }
695
696 void ArchiveBuilder::relocate_metaspaceobj_embedded_pointers() {
697 log_info(cds)("Relocating embedded pointers in core regions ... ");
698 relocate_embedded_pointers(&_rw_src_objs);
699 relocate_embedded_pointers(&_ro_src_objs);
700 update_special_refs();
701 }
702
703 // We must relocate vmClasses::_klasses[] only after we have copied the
704 // java objects in during dump_java_heap_objects(): during the object copy, we operate on
705 // old objects which assert that their klass is the original klass.
706 void ArchiveBuilder::relocate_vm_classes() {
707 log_info(cds)("Relocating vmClasses::_klasses[] ... ");
708 ResourceMark rm;
709 RefRelocator doit(this);
710 vmClasses::metaspace_pointers_do(&doit);
711 }
712
713 void ArchiveBuilder::make_klasses_shareable() {
714 int num_instance_klasses = 0;
715 int num_boot_klasses = 0;
716 int num_platform_klasses = 0;
717 int num_app_klasses = 0;
718 int num_hidden_klasses = 0;
719 int num_unlinked_klasses = 0;
720 int num_unregistered_klasses = 0;
721 int num_obj_array_klasses = 0;
722 int num_type_array_klasses = 0;
723
724 for (int i = 0; i < klasses()->length(); i++) {
725 const char* type;
726 const char* unlinked = "";
727 const char* hidden = "";
728 Klass* k = klasses()->at(i);
729 k->remove_java_mirror();
730 Klass* requested_k = to_requested(k);
731 narrowKlass nk = CompressedKlassPointers::encode_not_null(requested_k, _requested_static_archive_bottom);
732 k->set_prototype_header(markWord::prototype() LP64_ONLY(.set_narrow_klass(nk)));
733 if (k->is_objArray_klass()) {
734 // InstanceKlass and TypeArrayKlass will in turn call remove_unshareable_info
735 // on their array classes.
736 num_obj_array_klasses ++;
737 type = "array";
738 } else if (k->is_typeArray_klass()) {
739 num_type_array_klasses ++;
740 type = "array";
741 k->remove_unshareable_info();
742 } else {
743 assert(k->is_instance_klass(), " must be");
744 num_instance_klasses ++;
745 InstanceKlass* ik = InstanceKlass::cast(k);
746 if (DynamicDumpSharedSpaces) {
747 // For static dump, class loader type are already set.
748 ik->assign_class_loader_type();
749 }
750 if (ik->is_shared_boot_class()) {
751 type = "boot";
752 num_boot_klasses ++;
753 } else if (ik->is_shared_platform_class()) {
754 type = "plat";
755 num_platform_klasses ++;
756 } else if (ik->is_shared_app_class()) {
757 type = "app";
758 num_app_klasses ++;
759 } else {
760 assert(ik->is_shared_unregistered_class(), "must be");
761 type = "unreg";
762 num_unregistered_klasses ++;
763 }
764
765 if (!ik->is_linked()) {
766 num_unlinked_klasses ++;
767 unlinked = " ** unlinked";
768 }
769
770 if (ik->is_hidden()) {
771 num_hidden_klasses ++;
772 hidden = " ** hidden";
773 }
774
775 MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread::current(), ik);
776 ik->remove_unshareable_info();
777 }
778
779 if (log_is_enabled(Debug, cds, class)) {
780 ResourceMark rm;
781 log_debug(cds, class)("klasses[%5d] = " PTR_FORMAT " %-5s %s%s%s", i, p2i(to_requested(k)), type, k->external_name(), hidden, unlinked);
782 }
783 }
784
785 log_info(cds)("Number of classes %d", num_instance_klasses + num_obj_array_klasses + num_type_array_klasses);
786 log_info(cds)(" instance classes = %5d", num_instance_klasses);
787 log_info(cds)(" boot = %5d", num_boot_klasses);
788 log_info(cds)(" app = %5d", num_app_klasses);
789 log_info(cds)(" platform = %5d", num_platform_klasses);
790 log_info(cds)(" unregistered = %5d", num_unregistered_klasses);
791 log_info(cds)(" (hidden) = %5d", num_hidden_klasses);
792 log_info(cds)(" (unlinked) = %5d", num_unlinked_klasses);
793 log_info(cds)(" obj array classes = %5d", num_obj_array_klasses);
794 log_info(cds)(" type array classes = %5d", num_type_array_klasses);
795 log_info(cds)(" symbols = %5d", _symbols->length());
796 }
797
798 uintx ArchiveBuilder::buffer_to_offset(address p) const {
799 address requested_p = to_requested(p);
800 assert(requested_p >= _requested_static_archive_bottom, "must be");
801 return requested_p - _requested_static_archive_bottom;
802 }
803
804 uintx ArchiveBuilder::any_to_offset(address p) const {
805 if (is_in_mapped_static_archive(p)) {
806 assert(DynamicDumpSharedSpaces, "must be");
807 return p - _mapped_static_archive_bottom;
808 }
809 return buffer_to_offset(p);
810 }
811
812 // Update a Java object to point its Klass* to the new location after
813 // shared archive has been compacted.
814 void ArchiveBuilder::relocate_klass_ptr(oop o) {
815 assert(DumpSharedSpaces, "sanity");
816 Klass* k = get_relocated_klass(o->klass());
817 Klass* requested_k = to_requested(k);
818 narrowKlass nk = CompressedKlassPointers::encode_not_null(requested_k, _requested_static_archive_bottom);
819 #ifdef _LP64
820 o->set_mark(o->mark().set_narrow_klass(nk));
821 #endif
822 o->set_narrow_klass(nk);
823 }
824
825 // RelocateBufferToRequested --- Relocate all the pointers in rw/ro,
826 // so that the archive can be mapped to the "requested" location without runtime relocation.
827 //
828 // - See ArchiveBuilder header for the definition of "buffer", "mapped" and "requested"
829 // - ArchivePtrMarker::ptrmap() marks all the pointers in the rw/ro regions
830 // - Every pointer must have one of the following values:
831 // [a] NULL:
832 // No relocation is needed. Remove this pointer from ptrmap so we don't need to
833 // consider it at runtime.
834 // [b] Points into an object X which is inside the buffer:
835 // Adjust this pointer by _buffer_to_requested_delta, so it points to X
836 // when the archive is mapped at the requested location.
837 // [c] Points into an object Y which is inside mapped static archive:
838 // - This happens only during dynamic dump
839 // - Adjust this pointer by _mapped_to_requested_static_archive_delta,
840 // so it points to Y when the static archive is mapped at the requested location.
841 template <bool STATIC_DUMP>
842 class RelocateBufferToRequested : public BitMapClosure {
843 ArchiveBuilder* _builder;
844 address _buffer_bottom;
845 intx _buffer_to_requested_delta;
846 intx _mapped_to_requested_static_archive_delta;
847 size_t _max_non_null_offset;
848
849 public:
850 RelocateBufferToRequested(ArchiveBuilder* builder) {
851 _builder = builder;
852 _buffer_bottom = _builder->buffer_bottom();
853 _buffer_to_requested_delta = builder->buffer_to_requested_delta();
854 _mapped_to_requested_static_archive_delta = builder->requested_static_archive_bottom() - builder->mapped_static_archive_bottom();
855 _max_non_null_offset = 0;
856
857 address bottom = _builder->buffer_bottom();
858 address top = _builder->buffer_top();
859 address new_bottom = bottom + _buffer_to_requested_delta;
860 address new_top = top + _buffer_to_requested_delta;
861 log_debug(cds)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT "] to "
862 "[" INTPTR_FORMAT " - " INTPTR_FORMAT "]",
863 p2i(bottom), p2i(top),
864 p2i(new_bottom), p2i(new_top));
865 }
866
867 bool do_bit(size_t offset) {
868 address* p = (address*)_buffer_bottom + offset;
869 assert(_builder->is_in_buffer_space(p), "pointer must live in buffer space");
870
871 if (*p == NULL) {
872 // todo -- clear bit, etc
873 ArchivePtrMarker::ptrmap()->clear_bit(offset);
874 } else {
875 if (STATIC_DUMP) {
876 assert(_builder->is_in_buffer_space(*p), "old pointer must point inside buffer space");
877 *p += _buffer_to_requested_delta;
878 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive");
879 } else {
880 if (_builder->is_in_buffer_space(*p)) {
881 *p += _buffer_to_requested_delta;
882 // assert is in requested dynamic archive
883 } else {
884 assert(_builder->is_in_mapped_static_archive(*p), "old pointer must point inside buffer space or mapped static archive");
885 *p += _mapped_to_requested_static_archive_delta;
886 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive");
887 }
888 }
889 _max_non_null_offset = offset;
890 }
891
892 return true; // keep iterating
893 }
894
895 void doit() {
896 ArchivePtrMarker::ptrmap()->iterate(this);
897 ArchivePtrMarker::compact(_max_non_null_offset);
898 }
899 };
900
901
902 void ArchiveBuilder::relocate_to_requested() {
903 ro_region()->pack();
904
905 size_t my_archive_size = buffer_top() - buffer_bottom();
906
907 if (DumpSharedSpaces) {
908 _requested_static_archive_top = _requested_static_archive_bottom + my_archive_size;
909 RelocateBufferToRequested<true> patcher(this);
910 patcher.doit();
911 } else {
912 assert(DynamicDumpSharedSpaces, "must be");
913 _requested_dynamic_archive_top = _requested_dynamic_archive_bottom + my_archive_size;
914 RelocateBufferToRequested<false> patcher(this);
915 patcher.doit();
916 }
917 }
918
919 // Write detailed info to a mapfile to analyze contents of the archive.
920 // static dump:
921 // java -Xshare:dump -Xlog:cds+map=trace:file=cds.map:none:filesize=0
922 // dynamic dump:
923 // java -cp MyApp.jar -XX:ArchiveClassesAtExit=MyApp.jsa \
924 // -Xlog:cds+map=trace:file=cds.map:none:filesize=0 MyApp
925 //
926 // We need to do some address translation because the buffers used at dump time may be mapped to
927 // a different location at runtime. At dump time, the buffers may be at arbitrary locations
928 // picked by the OS. At runtime, we try to map at a fixed location (SharedBaseAddress). For
929 // consistency, we log everything using runtime addresses.
930 class ArchiveBuilder::CDSMapLogger : AllStatic {
931 static intx buffer_to_runtime_delta() {
932 // Translate the buffers used by the RW/RO regions to their eventual (requested) locations
933 // at runtime.
934 return ArchiveBuilder::current()->buffer_to_requested_delta();
935 }
936
937 // rw/ro regions only
938 static void write_dump_region(const char* name, DumpRegion* region) {
939 address region_base = address(region->base());
940 address region_top = address(region->top());
941 write_region(name, region_base, region_top, region_base + buffer_to_runtime_delta());
942 }
943
944 #define _LOG_PREFIX PTR_FORMAT ": @@ %-17s %d"
945
946 static void write_klass(Klass* k, address runtime_dest, const char* type_name, int bytes, Thread* current) {
947 ResourceMark rm(current);
948 log_debug(cds, map)(_LOG_PREFIX " %s",
949 p2i(runtime_dest), type_name, bytes, k->external_name());
950 }
951 static void write_method(Method* m, address runtime_dest, const char* type_name, int bytes, Thread* current) {
952 ResourceMark rm(current);
953 log_debug(cds, map)(_LOG_PREFIX " %s",
954 p2i(runtime_dest), type_name, bytes, m->external_name());
955 }
956
957 // rw/ro regions only
958 static void write_objects(DumpRegion* region, const ArchiveBuilder::SourceObjList* src_objs) {
959 address last_obj_base = address(region->base());
960 address last_obj_end = address(region->base());
961 address region_end = address(region->end());
962 Thread* current = Thread::current();
963 for (int i = 0; i < src_objs->objs()->length(); i++) {
964 SourceObjInfo* src_info = src_objs->at(i);
965 address src = src_info->orig_obj();
966 address dest = src_info->dumped_addr();
967 write_data(last_obj_base, dest, last_obj_base + buffer_to_runtime_delta());
968 address runtime_dest = dest + buffer_to_runtime_delta();
969 int bytes = src_info->size_in_bytes();
970
971 MetaspaceObj::Type type = src_info->msotype();
972 const char* type_name = MetaspaceObj::type_name(type);
973
974 switch (type) {
975 case MetaspaceObj::ClassType:
976 write_klass((Klass*)src, runtime_dest, type_name, bytes, current);
977 break;
978 case MetaspaceObj::ConstantPoolType:
979 write_klass(((ConstantPool*)src)->pool_holder(),
980 runtime_dest, type_name, bytes, current);
981 break;
982 case MetaspaceObj::ConstantPoolCacheType:
983 write_klass(((ConstantPoolCache*)src)->constant_pool()->pool_holder(),
984 runtime_dest, type_name, bytes, current);
985 break;
986 case MetaspaceObj::MethodType:
987 write_method((Method*)src, runtime_dest, type_name, bytes, current);
988 break;
989 case MetaspaceObj::ConstMethodType:
990 write_method(((ConstMethod*)src)->method(), runtime_dest, type_name, bytes, current);
991 break;
992 case MetaspaceObj::SymbolType:
993 {
994 ResourceMark rm(current);
995 Symbol* s = (Symbol*)src;
996 log_debug(cds, map)(_LOG_PREFIX " %s", p2i(runtime_dest), type_name, bytes,
997 s->as_quoted_ascii());
998 }
999 break;
1000 default:
1001 log_debug(cds, map)(_LOG_PREFIX, p2i(runtime_dest), type_name, bytes);
1002 break;
1003 }
1004
1005 last_obj_base = dest;
1006 last_obj_end = dest + bytes;
1007 }
1008
1009 write_data(last_obj_base, last_obj_end, last_obj_base + buffer_to_runtime_delta());
1010 if (last_obj_end < region_end) {
1011 log_debug(cds, map)(PTR_FORMAT ": @@ Misc data " SIZE_FORMAT " bytes",
1012 p2i(last_obj_end + buffer_to_runtime_delta()),
1013 size_t(region_end - last_obj_end));
1014 write_data(last_obj_end, region_end, last_obj_end + buffer_to_runtime_delta());
1015 }
1016 }
1017
1018 #undef _LOG_PREFIX
1019
1020 // Write information about a region, whose address at dump time is [base .. top). At
1021 // runtime, this region will be mapped to runtime_base. runtime_base is 0 if this
1022 // region will be mapped at os-selected addresses (such as the bitmap region), or will
1023 // be accessed with os::read (the header).
1024 static void write_region(const char* name, address base, address top, address runtime_base) {
1025 size_t size = top - base;
1026 base = runtime_base;
1027 top = runtime_base + size;
1028 log_info(cds, map)("[%-18s " PTR_FORMAT " - " PTR_FORMAT " " SIZE_FORMAT_W(9) " bytes]",
1029 name, p2i(base), p2i(top), size);
1030 }
1031
1032 // open and closed archive regions
1033 static void write_heap_region(const char* which, GrowableArray<MemRegion> *regions) {
1034 for (int i = 0; i < regions->length(); i++) {
1035 address start = address(regions->at(i).start());
1036 address end = address(regions->at(i).end());
1037 write_region(which, start, end, start);
1038 write_data(start, end, start);
1039 }
1040 }
1041
1042 // Dump all the data [base...top). Pretend that the base address
1043 // will be mapped to runtime_base at run-time.
1044 static void write_data(address base, address top, address runtime_base) {
1045 assert(top >= base, "must be");
1046
1047 LogStreamHandle(Trace, cds, map) lsh;
1048 if (lsh.is_enabled()) {
1049 os::print_hex_dump(&lsh, base, top, sizeof(address), 32, runtime_base);
1050 }
1051 }
1052
1053 static void write_header(FileMapInfo* mapinfo) {
1054 LogStreamHandle(Info, cds, map) lsh;
1055 if (lsh.is_enabled()) {
1056 mapinfo->print(&lsh);
1057 }
1058 }
1059
1060 public:
1061 static void write(ArchiveBuilder* builder, FileMapInfo* mapinfo,
1062 GrowableArray<MemRegion> *closed_heap_regions,
1063 GrowableArray<MemRegion> *open_heap_regions,
1064 char* bitmap, size_t bitmap_size_in_bytes) {
1065 log_info(cds, map)("%s CDS archive map for %s", DumpSharedSpaces ? "Static" : "Dynamic", mapinfo->full_path());
1066
1067 address header = address(mapinfo->header());
1068 address header_end = header + mapinfo->header()->header_size();
1069 write_region("header", header, header_end, 0);
1070 write_header(mapinfo);
1071 write_data(header, header_end, 0);
1072
1073 DumpRegion* rw_region = &builder->_rw_region;
1074 DumpRegion* ro_region = &builder->_ro_region;
1075
1076 write_dump_region("rw region", rw_region);
1077 write_objects(rw_region, &builder->_rw_src_objs);
1078
1079 write_dump_region("ro region", ro_region);
1080 write_objects(ro_region, &builder->_ro_src_objs);
1081
1082 address bitmap_end = address(bitmap + bitmap_size_in_bytes);
1083 write_region("bitmap", address(bitmap), bitmap_end, 0);
1084 write_data(header, header_end, 0);
1085
1086 if (closed_heap_regions != NULL) {
1087 write_heap_region("closed heap region", closed_heap_regions);
1088 }
1089 if (open_heap_regions != NULL) {
1090 write_heap_region("open heap region", open_heap_regions);
1091 }
1092
1093 log_info(cds, map)("[End of CDS archive map]");
1094 }
1095 };
1096
1097 void ArchiveBuilder::print_stats() {
1098 _alloc_stats.print_stats(int(_ro_region.used()), int(_rw_region.used()));
1099 }
1100
1101 void ArchiveBuilder::clean_up_src_obj_table() {
1102 SrcObjTableCleaner cleaner;
1103 _src_obj_table.iterate(&cleaner);
1104 }
1105
1106 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo,
1107 GrowableArray<MemRegion>* closed_heap_regions,
1108 GrowableArray<MemRegion>* open_heap_regions,
1109 GrowableArray<ArchiveHeapOopmapInfo>* closed_heap_oopmaps,
1110 GrowableArray<ArchiveHeapOopmapInfo>* open_heap_oopmaps) {
1111 // Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with
1112 // MetaspaceShared::n_regions (internal to hotspot).
1113 assert(NUM_CDS_REGIONS == MetaspaceShared::n_regions, "sanity");
1114
1115 write_region(mapinfo, MetaspaceShared::rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false);
1116 write_region(mapinfo, MetaspaceShared::ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false);
1117
1118 size_t bitmap_size_in_bytes;
1119 char* bitmap = mapinfo->write_bitmap_region(ArchivePtrMarker::ptrmap(), closed_heap_oopmaps, open_heap_oopmaps,
1120 bitmap_size_in_bytes);
1121
1122 if (closed_heap_regions != NULL) {
1123 _total_closed_heap_region_size = mapinfo->write_heap_regions(
1124 closed_heap_regions,
1125 closed_heap_oopmaps,
1126 MetaspaceShared::first_closed_heap_region,
1127 MetaspaceShared::max_num_closed_heap_regions);
1128 _total_open_heap_region_size = mapinfo->write_heap_regions(
1129 open_heap_regions,
1130 open_heap_oopmaps,
1131 MetaspaceShared::first_open_heap_region,
1132 MetaspaceShared::max_num_open_heap_regions);
1133 }
1134
1135 print_region_stats(mapinfo, closed_heap_regions, open_heap_regions);
1136
1137 mapinfo->set_requested_base((char*)MetaspaceShared::requested_base_address());
1138 mapinfo->set_header_crc(mapinfo->compute_header_crc());
1139 // After this point, we should not write any data into mapinfo->header() since this
1140 // would corrupt its checksum we have calculated before.
1141 mapinfo->write_header();
1142 mapinfo->close();
1143
1144 if (log_is_enabled(Info, cds)) {
1145 print_stats();
1146 }
1147
1148 if (log_is_enabled(Info, cds, map)) {
1149 CDSMapLogger::write(this, mapinfo, closed_heap_regions, open_heap_regions,
1150 bitmap, bitmap_size_in_bytes);
1151 }
1152 FREE_C_HEAP_ARRAY(char, bitmap);
1153 }
1154
1155 void ArchiveBuilder::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) {
1156 mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec);
1157 }
1158
1159 void ArchiveBuilder::print_region_stats(FileMapInfo *mapinfo,
1160 GrowableArray<MemRegion>* closed_heap_regions,
1161 GrowableArray<MemRegion>* open_heap_regions) {
1162 // Print statistics of all the regions
1163 const size_t bitmap_used = mapinfo->space_at(MetaspaceShared::bm)->used();
1164 const size_t bitmap_reserved = mapinfo->space_at(MetaspaceShared::bm)->used_aligned();
1165 const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() +
1166 bitmap_reserved +
1167 _total_closed_heap_region_size +
1168 _total_open_heap_region_size;
1169 const size_t total_bytes = _ro_region.used() + _rw_region.used() +
1170 bitmap_used +
1171 _total_closed_heap_region_size +
1172 _total_open_heap_region_size;
1173 const double total_u_perc = percent_of(total_bytes, total_reserved);
1174
1175 _rw_region.print(total_reserved);
1176 _ro_region.print(total_reserved);
1177
1178 print_bitmap_region_stats(bitmap_used, total_reserved);
1179
1180 if (closed_heap_regions != NULL) {
1181 print_heap_region_stats(closed_heap_regions, "ca", total_reserved);
1182 print_heap_region_stats(open_heap_regions, "oa", total_reserved);
1183 }
1184
1185 log_debug(cds)("total : " SIZE_FORMAT_W(9) " [100.0%% of total] out of " SIZE_FORMAT_W(9) " bytes [%5.1f%% used]",
1186 total_bytes, total_reserved, total_u_perc);
1187 }
1188
1189 void ArchiveBuilder::print_bitmap_region_stats(size_t size, size_t total_size) {
1190 log_debug(cds)("bm space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used]",
1191 size, size/double(total_size)*100.0, size);
1192 }
1193
1194 void ArchiveBuilder::print_heap_region_stats(GrowableArray<MemRegion>* regions,
1195 const char *name, size_t total_size) {
1196 int arr_len = regions == NULL ? 0 : regions->length();
1197 for (int i = 0; i < arr_len; i++) {
1198 char* start = (char*)regions->at(i).start();
1199 size_t size = regions->at(i).byte_size();
1200 char* top = start + size;
1201 log_debug(cds)("%s%d space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used] at " INTPTR_FORMAT,
1202 name, i, size, size/double(total_size)*100.0, size, p2i(start));
1203 }
1204 }
1205
1206 void ArchiveBuilder::report_out_of_space(const char* name, size_t needed_bytes) {
1207 // This is highly unlikely to happen on 64-bits because we have reserved a 4GB space.
1208 // On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes
1209 // or so.
1210 _rw_region.print_out_of_space_msg(name, needed_bytes);
1211 _ro_region.print_out_of_space_msg(name, needed_bytes);
1212
1213 vm_exit_during_initialization(err_msg("Unable to allocate from '%s' region", name),
1214 "Please reduce the number of shared classes.");
1215 }
1216
1217
1218 #ifndef PRODUCT
1219 void ArchiveBuilder::assert_is_vm_thread() {
1220 assert(Thread::current()->is_VM_thread(), "ArchiveBuilder should be used only inside the VMThread");
1221 }
1222 #endif