1 /*
2 * Copyright (c) 2020, 2022, 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/objArrayKlass.hpp"
43 #include "oops/oopHandle.inline.hpp"
44 #include "runtime/arguments.hpp"
45 #include "runtime/globals_extension.hpp"
46 #include "runtime/sharedRuntime.hpp"
47 #include "runtime/thread.hpp"
48 #include "utilities/align.hpp"
49 #include "utilities/bitMap.inline.hpp"
50 #include "utilities/formatBuffer.hpp"
51 #include "utilities/hashtable.inline.hpp"
52
53 ArchiveBuilder* ArchiveBuilder::_current = NULL;
54
55 ArchiveBuilder::OtherROAllocMark::~OtherROAllocMark() {
56 char* newtop = ArchiveBuilder::current()->_ro_region.top();
57 ArchiveBuilder::alloc_stats()->record_other_type(int(newtop - _oldtop), true);
58 }
59
60 ArchiveBuilder::SourceObjList::SourceObjList() : _ptrmap(16 * K) {
61 _total_bytes = 0;
62 _objs = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<SourceObjInfo*>(128 * K, mtClassShared);
63 }
64
65 ArchiveBuilder::SourceObjList::~SourceObjList() {
66 delete _objs;
67 }
68
69 void ArchiveBuilder::SourceObjList::append(MetaspaceClosure::Ref* enclosing_ref, SourceObjInfo* src_info) {
70 // Save this source object for copying
71 _objs->append(src_info);
72
73 // Prepare for marking the pointers in this source object
74 assert(is_aligned(_total_bytes, sizeof(address)), "must be");
75 src_info->set_ptrmap_start(_total_bytes / sizeof(address));
76 _total_bytes = align_up(_total_bytes + (uintx)src_info->size_in_bytes(), sizeof(address));
77 src_info->set_ptrmap_end(_total_bytes / sizeof(address));
78
79 BitMap::idx_t bitmap_size_needed = BitMap::idx_t(src_info->ptrmap_end());
80 if (_ptrmap.size() <= bitmap_size_needed) {
81 _ptrmap.resize((bitmap_size_needed + 1) * 2);
82 }
83 }
84
85 void ArchiveBuilder::SourceObjList::remember_embedded_pointer(SourceObjInfo* src_info, MetaspaceClosure::Ref* ref) {
86 // src_obj contains a pointer. Remember the location of this pointer in _ptrmap,
87 // so that we can copy/relocate it later. E.g., if we have
88 // class Foo { intx scala; Bar* ptr; }
89 // Foo *f = 0x100;
90 // To mark the f->ptr pointer on 64-bit platform, this function is called with
91 // src_info()->obj() == 0x100
92 // ref->addr() == 0x108
93 address src_obj = src_info->obj();
94 address* field_addr = ref->addr();
95 assert(src_info->ptrmap_start() < _total_bytes, "sanity");
96 assert(src_info->ptrmap_end() <= _total_bytes, "sanity");
97 assert(*field_addr != NULL, "should have checked");
98
99 intx field_offset_in_bytes = ((address)field_addr) - src_obj;
100 DEBUG_ONLY(int src_obj_size = src_info->size_in_bytes();)
101 assert(field_offset_in_bytes >= 0, "must be");
102 assert(field_offset_in_bytes + intx(sizeof(intptr_t)) <= intx(src_obj_size), "must be");
103 assert(is_aligned(field_offset_in_bytes, sizeof(address)), "must be");
104
105 BitMap::idx_t idx = BitMap::idx_t(src_info->ptrmap_start() + (uintx)(field_offset_in_bytes / sizeof(address)));
106 _ptrmap.set_bit(BitMap::idx_t(idx));
107 }
108
109 class RelocateEmbeddedPointers : public BitMapClosure {
110 ArchiveBuilder* _builder;
111 address _dumped_obj;
112 BitMap::idx_t _start_idx;
113 public:
114 RelocateEmbeddedPointers(ArchiveBuilder* builder, address dumped_obj, BitMap::idx_t start_idx) :
115 _builder(builder), _dumped_obj(dumped_obj), _start_idx(start_idx) {}
116
117 bool do_bit(BitMap::idx_t bit_offset) {
118 size_t field_offset = size_t(bit_offset - _start_idx) * sizeof(address);
119 address* ptr_loc = (address*)(_dumped_obj + field_offset);
120
121 address old_p = *ptr_loc;
122 address new_p = _builder->get_dumped_addr(old_p);
123
124 log_trace(cds)("Ref: [" PTR_FORMAT "] -> " PTR_FORMAT " => " PTR_FORMAT,
125 p2i(ptr_loc), p2i(old_p), p2i(new_p));
126
127 ArchivePtrMarker::set_and_mark_pointer(ptr_loc, new_p);
128 return true; // keep iterating the bitmap
129 }
130 };
131
132 void ArchiveBuilder::SourceObjList::relocate(int i, ArchiveBuilder* builder) {
133 SourceObjInfo* src_info = objs()->at(i);
134 assert(src_info->should_copy(), "must be");
135 BitMap::idx_t start = BitMap::idx_t(src_info->ptrmap_start()); // inclusive
136 BitMap::idx_t end = BitMap::idx_t(src_info->ptrmap_end()); // exclusive
137
138 RelocateEmbeddedPointers relocator(builder, src_info->dumped_addr(), start);
139 _ptrmap.iterate(&relocator, start, end);
140 }
141
142 ArchiveBuilder::ArchiveBuilder() :
143 _current_dump_space(NULL),
144 _buffer_bottom(NULL),
145 _last_verified_top(NULL),
146 _num_dump_regions_used(0),
147 _other_region_used_bytes(0),
148 _requested_static_archive_bottom(NULL),
149 _requested_static_archive_top(NULL),
150 _requested_dynamic_archive_bottom(NULL),
151 _requested_dynamic_archive_top(NULL),
152 _mapped_static_archive_bottom(NULL),
153 _mapped_static_archive_top(NULL),
154 _buffer_to_requested_delta(0),
155 _rw_region("rw", MAX_SHARED_DELTA),
156 _ro_region("ro", MAX_SHARED_DELTA),
157 _rw_src_objs(),
158 _ro_src_objs(),
159 _src_obj_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE),
160 _total_closed_heap_region_size(0),
161 _total_open_heap_region_size(0),
162 _estimated_metaspaceobj_bytes(0),
163 _estimated_hashtable_bytes(0)
164 {
165 _klasses = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<Klass*>(4 * K, mtClassShared);
166 _symbols = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<Symbol*>(256 * K, mtClassShared);
167 _special_refs = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<SpecialRefInfo>(24 * K, mtClassShared);
168
169 assert(_current == NULL, "must be");
170 _current = this;
171 }
172
173 ArchiveBuilder::~ArchiveBuilder() {
174 assert(_current == this, "must be");
175 _current = NULL;
176
177 clean_up_src_obj_table();
178
179 for (int i = 0; i < _symbols->length(); i++) {
180 _symbols->at(i)->decrement_refcount();
181 }
182
183 delete _klasses;
184 delete _symbols;
185 delete _special_refs;
186 if (_shared_rs.is_reserved()) {
187 _shared_rs.release();
188 }
189 }
190
191 bool ArchiveBuilder::is_dumping_full_module_graph() {
192 return DumpSharedSpaces && MetaspaceShared::use_full_module_graph();
193 }
194
195 class GatherKlassesAndSymbols : public UniqueMetaspaceClosure {
196 ArchiveBuilder* _builder;
197
198 public:
199 GatherKlassesAndSymbols(ArchiveBuilder* builder) : _builder(builder) {}
200
201 virtual bool do_unique_ref(Ref* ref, bool read_only) {
202 return _builder->gather_klass_and_symbol(ref, read_only);
203 }
204 };
205
206 bool ArchiveBuilder::gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only) {
207 if (ref->obj() == NULL) {
208 return false;
209 }
210 if (get_follow_mode(ref) != make_a_copy) {
211 return false;
212 }
213 if (ref->msotype() == MetaspaceObj::ClassType) {
214 Klass* klass = (Klass*)ref->obj();
215 assert(klass->is_klass(), "must be");
216 if (!is_excluded(klass)) {
217 _klasses->append(klass);
218 }
219 // See RunTimeClassInfo::get_for()
220 _estimated_metaspaceobj_bytes += align_up(BytesPerWord, SharedSpaceObjectAlignment);
221 } else if (ref->msotype() == MetaspaceObj::SymbolType) {
222 // Make sure the symbol won't be GC'ed while we are dumping the archive.
223 Symbol* sym = (Symbol*)ref->obj();
224 sym->increment_refcount();
225 _symbols->append(sym);
226 }
227
228 int bytes = ref->size() * BytesPerWord;
229 _estimated_metaspaceobj_bytes += align_up(bytes, SharedSpaceObjectAlignment);
230
231 return true; // recurse
232 }
233
234 void ArchiveBuilder::gather_klasses_and_symbols() {
235 ResourceMark rm;
236 log_info(cds)("Gathering classes and symbols ... ");
237 GatherKlassesAndSymbols doit(this);
238 iterate_roots(&doit, /*is_relocating_pointers=*/false);
239 #if INCLUDE_CDS_JAVA_HEAP
240 if (is_dumping_full_module_graph()) {
241 ClassLoaderDataShared::iterate_symbols(&doit);
242 }
243 #endif
244 doit.finish();
245
246 if (DumpSharedSpaces) {
247 // To ensure deterministic contents in the static archive, we need to ensure that
248 // we iterate the MetaspaceObjs in a deterministic order. It doesn't matter where
249 // the MetaspaceObjs are located originally, as they are copied sequentially into
250 // the archive during the iteration.
251 //
252 // The only issue here is that the symbol table and the system directories may be
253 // randomly ordered, so we copy the symbols and klasses into two arrays and sort
254 // them deterministically.
255 //
256 // During -Xshare:dump, the order of Symbol creation is strictly determined by
257 // the SharedClassListFile (class loading is done in a single thread and the JIT
258 // is disabled). Also, Symbols are allocated in monotonically increasing addresses
259 // (see Symbol::operator new(size_t, int)). So if we iterate the Symbols by
260 // ascending address order, we ensure that all Symbols are copied into deterministic
261 // locations in the archive.
262 //
263 // TODO: in the future, if we want to produce deterministic contents in the
264 // dynamic archive, we might need to sort the symbols alphabetically (also see
265 // DynamicArchiveBuilder::sort_methods()).
266 sort_symbols_and_fix_hash();
267 sort_klasses();
268
269 // TODO -- we need a proper estimate for the archived modules, etc,
270 // but this should be enough for now
271 _estimated_metaspaceobj_bytes += 200 * 1024 * 1024;
272 }
273 }
274
275 int ArchiveBuilder::compare_symbols_by_address(Symbol** a, Symbol** b) {
276 if (a[0] < b[0]) {
277 return -1;
278 } else {
279 assert(a[0] > b[0], "Duplicated symbol %s unexpected", (*a)->as_C_string());
280 return 1;
281 }
282 }
283
284 void ArchiveBuilder::sort_symbols_and_fix_hash() {
285 log_info(cds)("Sorting symbols and fixing identity hash ... ");
286 os::init_random(0x12345678);
287 _symbols->sort(compare_symbols_by_address);
288 for (int i = 0; i < _symbols->length(); i++) {
289 assert(_symbols->at(i)->is_permanent(), "archived symbols must be permanent");
290 _symbols->at(i)->update_identity_hash();
291 }
292 }
293
294 int ArchiveBuilder::compare_klass_by_name(Klass** a, Klass** b) {
295 return a[0]->name()->fast_compare(b[0]->name());
296 }
297
298 void ArchiveBuilder::sort_klasses() {
299 log_info(cds)("Sorting classes ... ");
300 _klasses->sort(compare_klass_by_name);
301 }
302
303 size_t ArchiveBuilder::estimate_archive_size() {
304 // size of the symbol table and two dictionaries, plus the RunTimeClassInfo's
305 size_t symbol_table_est = SymbolTable::estimate_size_for_archive();
306 size_t dictionary_est = SystemDictionaryShared::estimate_size_for_archive();
307 _estimated_hashtable_bytes = symbol_table_est + dictionary_est;
308
309 size_t total = 0;
310
311 total += _estimated_metaspaceobj_bytes;
312 total += _estimated_hashtable_bytes;
313
314 // allow fragmentation at the end of each dump region
315 total += _total_dump_regions * MetaspaceShared::core_region_alignment();
316
317 log_info(cds)("_estimated_hashtable_bytes = " SIZE_FORMAT " + " SIZE_FORMAT " = " SIZE_FORMAT,
318 symbol_table_est, dictionary_est, _estimated_hashtable_bytes);
319 log_info(cds)("_estimated_metaspaceobj_bytes = " SIZE_FORMAT, _estimated_metaspaceobj_bytes);
320 log_info(cds)("total estimate bytes = " SIZE_FORMAT, total);
321
322 return align_up(total, MetaspaceShared::core_region_alignment());
323 }
324
325 address ArchiveBuilder::reserve_buffer() {
326 size_t buffer_size = estimate_archive_size();
327 ReservedSpace rs(buffer_size, MetaspaceShared::core_region_alignment(), os::vm_page_size());
328 if (!rs.is_reserved()) {
329 log_error(cds)("Failed to reserve " SIZE_FORMAT " bytes of output buffer.", buffer_size);
330 vm_direct_exit(0);
331 }
332
333 // buffer_bottom is the lowest address of the 2 core regions (rw, ro) when
334 // we are copying the class metadata into the buffer.
335 address buffer_bottom = (address)rs.base();
336 log_info(cds)("Reserved output buffer space at " PTR_FORMAT " [" SIZE_FORMAT " bytes]",
337 p2i(buffer_bottom), buffer_size);
338 _shared_rs = rs;
339
340 _buffer_bottom = buffer_bottom;
341 _last_verified_top = buffer_bottom;
342 _current_dump_space = &_rw_region;
343 _num_dump_regions_used = 1;
344 _other_region_used_bytes = 0;
345 _current_dump_space->init(&_shared_rs, &_shared_vs);
346
347 ArchivePtrMarker::initialize(&_ptrmap, &_shared_vs);
348
349 // The bottom of the static archive should be mapped at this address by default.
350 _requested_static_archive_bottom = (address)MetaspaceShared::requested_base_address();
351
352 // The bottom of the archive (that I am writing now) should be mapped at this address by default.
353 address my_archive_requested_bottom;
354
355 if (DumpSharedSpaces) {
356 my_archive_requested_bottom = _requested_static_archive_bottom;
357 } else {
358 _mapped_static_archive_bottom = (address)MetaspaceObj::shared_metaspace_base();
359 _mapped_static_archive_top = (address)MetaspaceObj::shared_metaspace_top();
360 assert(_mapped_static_archive_top >= _mapped_static_archive_bottom, "must be");
361 size_t static_archive_size = _mapped_static_archive_top - _mapped_static_archive_bottom;
362
363 // At run time, we will mmap the dynamic archive at my_archive_requested_bottom
364 _requested_static_archive_top = _requested_static_archive_bottom + static_archive_size;
365 my_archive_requested_bottom = align_up(_requested_static_archive_top, MetaspaceShared::core_region_alignment());
366
367 _requested_dynamic_archive_bottom = my_archive_requested_bottom;
368 }
369
370 _buffer_to_requested_delta = my_archive_requested_bottom - _buffer_bottom;
371
372 address my_archive_requested_top = my_archive_requested_bottom + buffer_size;
373 if (my_archive_requested_bottom < _requested_static_archive_bottom ||
374 my_archive_requested_top <= _requested_static_archive_bottom) {
375 // Size overflow.
376 log_error(cds)("my_archive_requested_bottom = " INTPTR_FORMAT, p2i(my_archive_requested_bottom));
377 log_error(cds)("my_archive_requested_top = " INTPTR_FORMAT, p2i(my_archive_requested_top));
378 log_error(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is too high. "
379 "Please rerun java -Xshare:dump with a lower value", p2i(_requested_static_archive_bottom));
380 vm_direct_exit(0);
381 }
382
383 if (DumpSharedSpaces) {
384 // We don't want any valid object to be at the very bottom of the archive.
385 // See ArchivePtrMarker::mark_pointer().
386 rw_region()->allocate(16);
387 }
388
389 return buffer_bottom;
390 }
391
392 void ArchiveBuilder::iterate_sorted_roots(MetaspaceClosure* it, bool is_relocating_pointers) {
393 int i;
394
395 if (!is_relocating_pointers) {
396 // Don't relocate _symbol, so we can safely call decrement_refcount on the
397 // original symbols.
398 int num_symbols = _symbols->length();
399 for (i = 0; i < num_symbols; i++) {
400 it->push(_symbols->adr_at(i));
401 }
402 }
403
404 int num_klasses = _klasses->length();
405 for (i = 0; i < num_klasses; i++) {
406 it->push(_klasses->adr_at(i));
407 }
408
409 iterate_roots(it, is_relocating_pointers);
410 }
411
412 class GatherSortedSourceObjs : public MetaspaceClosure {
413 ArchiveBuilder* _builder;
414
415 public:
416 GatherSortedSourceObjs(ArchiveBuilder* builder) : _builder(builder) {}
417
418 virtual bool do_ref(Ref* ref, bool read_only) {
419 return _builder->gather_one_source_obj(enclosing_ref(), ref, read_only);
420 }
421
422 virtual void push_special(SpecialRef type, Ref* ref, intptr_t* p) {
423 address src_obj = ref->obj();
424 size_t field_offset = pointer_delta(p, src_obj, sizeof(u1));
425 _builder->add_special_ref(type, src_obj, field_offset, ref->size() * BytesPerWord);
426 };
427
428 virtual void do_pending_ref(Ref* ref) {
429 if (ref->obj() != NULL) {
430 _builder->remember_embedded_pointer_in_copied_obj(enclosing_ref(), ref);
431 }
432 }
433 };
434
435 bool ArchiveBuilder::gather_one_source_obj(MetaspaceClosure::Ref* enclosing_ref,
436 MetaspaceClosure::Ref* ref, bool read_only) {
437 address src_obj = ref->obj();
438 if (src_obj == NULL) {
439 return false;
440 }
441 ref->set_keep_after_pushing();
442 remember_embedded_pointer_in_copied_obj(enclosing_ref, ref);
443
444 FollowMode follow_mode = get_follow_mode(ref);
445 SourceObjInfo src_info(ref, read_only, follow_mode);
446 bool created;
447 SourceObjInfo* p = _src_obj_table.put_if_absent(src_obj, src_info, &created);
448 if (created) {
449 if (_src_obj_table.maybe_grow()) {
450 log_info(cds, hashtables)("Expanded _src_obj_table table to %d", _src_obj_table.table_size());
451 }
452 }
453
454 assert(p->read_only() == src_info.read_only(), "must be");
455
456 if (created && src_info.should_copy()) {
457 ref->set_user_data((void*)p);
458 if (read_only) {
459 _ro_src_objs.append(enclosing_ref, p);
460 } else {
461 _rw_src_objs.append(enclosing_ref, p);
462 }
463 return true; // Need to recurse into this ref only if we are copying it
464 } else {
465 return false;
466 }
467 }
468
469 void ArchiveBuilder::remember_embedded_pointer_in_copied_obj(MetaspaceClosure::Ref* enclosing_ref,
470 MetaspaceClosure::Ref* ref) {
471 assert(ref->obj() != NULL, "should have checked");
472
473 if (enclosing_ref != NULL) {
474 SourceObjInfo* src_info = (SourceObjInfo*)enclosing_ref->user_data();
475 if (src_info == NULL) {
476 // source objects of point_to_it/set_to_null types are not copied
477 // so we don't need to remember their pointers.
478 } else {
479 if (src_info->read_only()) {
480 _ro_src_objs.remember_embedded_pointer(src_info, ref);
481 } else {
482 _rw_src_objs.remember_embedded_pointer(src_info, ref);
483 }
484 }
485 }
486 }
487
488 void ArchiveBuilder::gather_source_objs() {
489 ResourceMark rm;
490 log_info(cds)("Gathering all archivable objects ... ");
491 gather_klasses_and_symbols();
492 GatherSortedSourceObjs doit(this);
493 iterate_sorted_roots(&doit, /*is_relocating_pointers=*/false);
494 doit.finish();
495 }
496
497 bool ArchiveBuilder::is_excluded(Klass* klass) {
498 if (klass->is_instance_klass()) {
499 InstanceKlass* ik = InstanceKlass::cast(klass);
500 return SystemDictionaryShared::is_excluded_class(ik);
501 } else if (klass->is_objArray_klass()) {
502 if (DynamicDumpSharedSpaces) {
503 // Don't support archiving of array klasses for now (WHY???)
504 return true;
505 }
506 Klass* bottom = ObjArrayKlass::cast(klass)->bottom_klass();
507 if (bottom->is_instance_klass()) {
508 return SystemDictionaryShared::is_excluded_class(InstanceKlass::cast(bottom));
509 }
510 }
511
512 return false;
513 }
514
515 ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref *ref) {
516 address obj = ref->obj();
517 if (MetaspaceShared::is_in_shared_metaspace(obj)) {
518 // Don't dump existing shared metadata again.
519 return point_to_it;
520 } else if (ref->msotype() == MetaspaceObj::MethodDataType ||
521 ref->msotype() == MetaspaceObj::MethodCountersType) {
522 return set_to_null;
523 } else {
524 if (ref->msotype() == MetaspaceObj::ClassType) {
525 Klass* klass = (Klass*)ref->obj();
526 assert(klass->is_klass(), "must be");
527 if (is_excluded(klass)) {
528 ResourceMark rm;
529 log_debug(cds, dynamic)("Skipping class (excluded): %s", klass->external_name());
530 return set_to_null;
531 }
532 }
533
534 return make_a_copy;
535 }
536 }
537
538 void ArchiveBuilder::start_dump_space(DumpRegion* next) {
539 address bottom = _last_verified_top;
540 address top = (address)(current_dump_space()->top());
541 _other_region_used_bytes += size_t(top - bottom);
542
543 current_dump_space()->pack(next);
544 _current_dump_space = next;
545 _num_dump_regions_used ++;
546
547 _last_verified_top = (address)(current_dump_space()->top());
548 }
549
550 void ArchiveBuilder::verify_estimate_size(size_t estimate, const char* which) {
551 address bottom = _last_verified_top;
552 address top = (address)(current_dump_space()->top());
553 size_t used = size_t(top - bottom) + _other_region_used_bytes;
554 int diff = int(estimate) - int(used);
555
556 log_info(cds)("%s estimate = " SIZE_FORMAT " used = " SIZE_FORMAT "; diff = %d bytes", which, estimate, used, diff);
557 assert(diff >= 0, "Estimate is too small");
558
559 _last_verified_top = top;
560 _other_region_used_bytes = 0;
561 }
562
563 void ArchiveBuilder::dump_rw_metadata() {
564 ResourceMark rm;
565 log_info(cds)("Allocating RW objects ... ");
566 make_shallow_copies(&_rw_region, &_rw_src_objs);
567
568 #if INCLUDE_CDS_JAVA_HEAP
569 if (is_dumping_full_module_graph()) {
570 // Archive the ModuleEntry's and PackageEntry's of the 3 built-in loaders
571 char* start = rw_region()->top();
572 ClassLoaderDataShared::allocate_archived_tables();
573 alloc_stats()->record_modules(rw_region()->top() - start, /*read_only*/false);
574 }
575 #endif
576 }
577
578 void ArchiveBuilder::dump_ro_metadata() {
579 ResourceMark rm;
580 log_info(cds)("Allocating RO objects ... ");
581
582 start_dump_space(&_ro_region);
583 make_shallow_copies(&_ro_region, &_ro_src_objs);
584
585 #if INCLUDE_CDS_JAVA_HEAP
586 if (is_dumping_full_module_graph()) {
587 char* start = ro_region()->top();
588 ClassLoaderDataShared::init_archived_tables();
589 alloc_stats()->record_modules(ro_region()->top() - start, /*read_only*/true);
590 }
591 #endif
592 }
593
594 void ArchiveBuilder::make_shallow_copies(DumpRegion *dump_region,
595 const ArchiveBuilder::SourceObjList* src_objs) {
596 for (int i = 0; i < src_objs->objs()->length(); i++) {
597 make_shallow_copy(dump_region, src_objs->objs()->at(i));
598 }
599 log_info(cds)("done (%d objects)", src_objs->objs()->length());
600 }
601
602 void ArchiveBuilder::make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info) {
603 MetaspaceClosure::Ref* ref = src_info->ref();
604 address src = ref->obj();
605 int bytes = src_info->size_in_bytes();
606 char* dest;
607 char* oldtop;
608 char* newtop;
609
610 oldtop = dump_region->top();
611 if (ref->msotype() == MetaspaceObj::ClassType) {
612 // Save a pointer immediate in front of an InstanceKlass, so
613 // we can do a quick lookup from InstanceKlass* -> RunTimeClassInfo*
614 // without building another hashtable. See RunTimeClassInfo::get_for()
615 // in systemDictionaryShared.cpp.
616 Klass* klass = (Klass*)src;
617 if (klass->is_instance_klass()) {
618 SystemDictionaryShared::validate_before_archiving(InstanceKlass::cast(klass));
619 dump_region->allocate(sizeof(address));
620 }
621 }
622 dest = dump_region->allocate(bytes);
623 newtop = dump_region->top();
624
625 memcpy(dest, src, bytes);
626
627 intptr_t* archived_vtable = CppVtables::get_archived_vtable(ref->msotype(), (address)dest);
628 if (archived_vtable != NULL) {
629 *(address*)dest = (address)archived_vtable;
630 ArchivePtrMarker::mark_pointer((address*)dest);
631 }
632
633 log_trace(cds)("Copy: " PTR_FORMAT " ==> " PTR_FORMAT " %d", p2i(src), p2i(dest), bytes);
634 src_info->set_dumped_addr((address)dest);
635
636 _alloc_stats.record(ref->msotype(), int(newtop - oldtop), src_info->read_only());
637 }
638
639 address ArchiveBuilder::get_dumped_addr(address src_obj) const {
640 SourceObjInfo* p = _src_obj_table.get(src_obj);
641 assert(p != NULL, "must be");
642
643 return p->dumped_addr();
644 }
645
646 void ArchiveBuilder::relocate_embedded_pointers(ArchiveBuilder::SourceObjList* src_objs) {
647 for (int i = 0; i < src_objs->objs()->length(); i++) {
648 src_objs->relocate(i, this);
649 }
650 }
651
652 void ArchiveBuilder::update_special_refs() {
653 for (int i = 0; i < _special_refs->length(); i++) {
654 SpecialRefInfo s = _special_refs->at(i);
655 size_t field_offset = s.field_offset();
656 address src_obj = s.src_obj();
657 address dst_obj = get_dumped_addr(src_obj);
658 intptr_t* src_p = (intptr_t*)(src_obj + field_offset);
659 intptr_t* dst_p = (intptr_t*)(dst_obj + field_offset);
660
661
662 MetaspaceClosure::assert_valid(s.type());
663 switch (s.type()) {
664 case MetaspaceClosure::_method_entry_ref:
665 assert(*src_p == *dst_p, "must be a copy");
666 break;
667 case MetaspaceClosure::_internal_pointer_ref:
668 {
669 // *src_p points to a location inside src_obj. Let's make *dst_p point to
670 // the same location inside dst_obj.
671 size_t off = pointer_delta(*((address*)src_p), src_obj, sizeof(u1));
672 assert(off < s.src_obj_size_in_bytes(), "must point to internal address");
673 *((address*)dst_p) = dst_obj + off;
674 }
675 break;
676 default:
677 ShouldNotReachHere();
678 }
679 ArchivePtrMarker::mark_pointer((address*)dst_p);
680 }
681 }
682
683 class RefRelocator: public MetaspaceClosure {
684 ArchiveBuilder* _builder;
685
686 public:
687 RefRelocator(ArchiveBuilder* builder) : _builder(builder) {}
688
689 virtual bool do_ref(Ref* ref, bool read_only) {
690 if (ref->not_null()) {
691 ref->update(_builder->get_dumped_addr(ref->obj()));
692 ArchivePtrMarker::mark_pointer(ref->addr());
693 }
694 return false; // Do not recurse.
695 }
696 };
697
698 void ArchiveBuilder::relocate_roots() {
699 log_info(cds)("Relocating external roots ... ");
700 ResourceMark rm;
701 RefRelocator doit(this);
702 iterate_sorted_roots(&doit, /*is_relocating_pointers=*/true);
703 doit.finish();
704 log_info(cds)("done");
705 }
706
707 void ArchiveBuilder::relocate_metaspaceobj_embedded_pointers() {
708 log_info(cds)("Relocating embedded pointers in core regions ... ");
709 relocate_embedded_pointers(&_rw_src_objs);
710 relocate_embedded_pointers(&_ro_src_objs);
711 update_special_refs();
712 }
713
714 // We must relocate vmClasses::_klasses[] only after we have copied the
715 // java objects in during dump_java_heap_objects(): during the object copy, we operate on
716 // old objects which assert that their klass is the original klass.
717 void ArchiveBuilder::relocate_vm_classes() {
718 log_info(cds)("Relocating vmClasses::_klasses[] ... ");
719 ResourceMark rm;
720 RefRelocator doit(this);
721 vmClasses::metaspace_pointers_do(&doit);
722 }
723
724 void ArchiveBuilder::make_klasses_shareable() {
725 int num_instance_klasses = 0;
726 int num_boot_klasses = 0;
727 int num_platform_klasses = 0;
728 int num_app_klasses = 0;
729 int num_hidden_klasses = 0;
730 int num_unlinked_klasses = 0;
731 int num_unregistered_klasses = 0;
732 int num_obj_array_klasses = 0;
733 int num_type_array_klasses = 0;
734
735 for (int i = 0; i < klasses()->length(); i++) {
736 const char* type;
737 const char* unlinked = "";
738 const char* hidden = "";
739 Klass* k = klasses()->at(i);
740 k->remove_java_mirror();
741 if (k->is_objArray_klass()) {
742 // InstanceKlass and TypeArrayKlass will in turn call remove_unshareable_info
743 // on their array classes.
744 num_obj_array_klasses ++;
745 type = "array";
746 } else if (k->is_typeArray_klass()) {
747 num_type_array_klasses ++;
748 type = "array";
749 k->remove_unshareable_info();
750 } else {
751 assert(k->is_instance_klass(), " must be");
752 num_instance_klasses ++;
753 InstanceKlass* ik = InstanceKlass::cast(k);
754 if (DynamicDumpSharedSpaces) {
755 // For static dump, class loader type are already set.
756 ik->assign_class_loader_type();
757 }
758 if (ik->is_shared_boot_class()) {
759 type = "boot";
760 num_boot_klasses ++;
761 } else if (ik->is_shared_platform_class()) {
762 type = "plat";
763 num_platform_klasses ++;
764 } else if (ik->is_shared_app_class()) {
765 type = "app";
766 num_app_klasses ++;
767 } else {
768 assert(ik->is_shared_unregistered_class(), "must be");
769 type = "unreg";
770 num_unregistered_klasses ++;
771 }
772
773 if (!ik->is_linked()) {
774 num_unlinked_klasses ++;
775 unlinked = " ** unlinked";
776 }
777
778 if (ik->is_hidden()) {
779 num_hidden_klasses ++;
780 hidden = " ** hidden";
781 }
782
783 MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread::current(), ik);
784 ik->remove_unshareable_info();
785 }
786
787 if (log_is_enabled(Debug, cds, class)) {
788 ResourceMark rm;
789 log_debug(cds, class)("klasses[%5d] = " PTR_FORMAT " %-5s %s%s%s", i, p2i(to_requested(k)), type, k->external_name(), hidden, unlinked);
790 }
791 }
792
793 log_info(cds)("Number of classes %d", num_instance_klasses + num_obj_array_klasses + num_type_array_klasses);
794 log_info(cds)(" instance classes = %5d", num_instance_klasses);
795 log_info(cds)(" boot = %5d", num_boot_klasses);
796 log_info(cds)(" app = %5d", num_app_klasses);
797 log_info(cds)(" platform = %5d", num_platform_klasses);
798 log_info(cds)(" unregistered = %5d", num_unregistered_klasses);
799 log_info(cds)(" (hidden) = %5d", num_hidden_klasses);
800 log_info(cds)(" (unlinked) = %5d", num_unlinked_klasses);
801 log_info(cds)(" obj array classes = %5d", num_obj_array_klasses);
802 log_info(cds)(" type array classes = %5d", num_type_array_klasses);
803 log_info(cds)(" symbols = %5d", _symbols->length());
804 }
805
806 uintx ArchiveBuilder::buffer_to_offset(address p) const {
807 address requested_p = to_requested(p);
808 assert(requested_p >= _requested_static_archive_bottom, "must be");
809 return requested_p - _requested_static_archive_bottom;
810 }
811
812 uintx ArchiveBuilder::any_to_offset(address p) const {
813 if (is_in_mapped_static_archive(p)) {
814 assert(DynamicDumpSharedSpaces, "must be");
815 return p - _mapped_static_archive_bottom;
816 }
817 return buffer_to_offset(p);
818 }
819
820 // Update a Java object to point its Klass* to the new location after
821 // shared archive has been compacted.
822 void ArchiveBuilder::relocate_klass_ptr(oop o) {
823 assert(DumpSharedSpaces, "sanity");
824 Klass* k = get_relocated_klass(o->klass());
825 Klass* requested_k = to_requested(k);
826 narrowKlass nk = CompressedKlassPointers::encode_not_null(requested_k, _requested_static_archive_bottom);
827 o->set_narrow_klass(nk);
828 }
829
830 // RelocateBufferToRequested --- Relocate all the pointers in rw/ro,
831 // so that the archive can be mapped to the "requested" location without runtime relocation.
832 //
833 // - See ArchiveBuilder header for the definition of "buffer", "mapped" and "requested"
834 // - ArchivePtrMarker::ptrmap() marks all the pointers in the rw/ro regions
835 // - Every pointer must have one of the following values:
836 // [a] NULL:
837 // No relocation is needed. Remove this pointer from ptrmap so we don't need to
838 // consider it at runtime.
839 // [b] Points into an object X which is inside the buffer:
840 // Adjust this pointer by _buffer_to_requested_delta, so it points to X
841 // when the archive is mapped at the requested location.
842 // [c] Points into an object Y which is inside mapped static archive:
843 // - This happens only during dynamic dump
844 // - Adjust this pointer by _mapped_to_requested_static_archive_delta,
845 // so it points to Y when the static archive is mapped at the requested location.
846 template <bool STATIC_DUMP>
847 class RelocateBufferToRequested : public BitMapClosure {
848 ArchiveBuilder* _builder;
849 address _buffer_bottom;
850 intx _buffer_to_requested_delta;
851 intx _mapped_to_requested_static_archive_delta;
852 size_t _max_non_null_offset;
853
854 public:
855 RelocateBufferToRequested(ArchiveBuilder* builder) {
856 _builder = builder;
857 _buffer_bottom = _builder->buffer_bottom();
858 _buffer_to_requested_delta = builder->buffer_to_requested_delta();
859 _mapped_to_requested_static_archive_delta = builder->requested_static_archive_bottom() - builder->mapped_static_archive_bottom();
860 _max_non_null_offset = 0;
861
862 address bottom = _builder->buffer_bottom();
863 address top = _builder->buffer_top();
864 address new_bottom = bottom + _buffer_to_requested_delta;
865 address new_top = top + _buffer_to_requested_delta;
866 log_debug(cds)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT "] to "
867 "[" INTPTR_FORMAT " - " INTPTR_FORMAT "]",
868 p2i(bottom), p2i(top),
869 p2i(new_bottom), p2i(new_top));
870 }
871
872 bool do_bit(size_t offset) {
873 address* p = (address*)_buffer_bottom + offset;
874 assert(_builder->is_in_buffer_space(p), "pointer must live in buffer space");
875
876 if (*p == NULL) {
877 // todo -- clear bit, etc
878 ArchivePtrMarker::ptrmap()->clear_bit(offset);
879 } else {
880 if (STATIC_DUMP) {
881 assert(_builder->is_in_buffer_space(*p), "old pointer must point inside buffer space");
882 *p += _buffer_to_requested_delta;
883 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive");
884 } else {
885 if (_builder->is_in_buffer_space(*p)) {
886 *p += _buffer_to_requested_delta;
887 // assert is in requested dynamic archive
888 } else {
889 assert(_builder->is_in_mapped_static_archive(*p), "old pointer must point inside buffer space or mapped static archive");
890 *p += _mapped_to_requested_static_archive_delta;
891 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive");
892 }
893 }
894 _max_non_null_offset = offset;
895 }
896
897 return true; // keep iterating
898 }
899
900 void doit() {
901 ArchivePtrMarker::ptrmap()->iterate(this);
902 ArchivePtrMarker::compact(_max_non_null_offset);
903 }
904 };
905
906
907 void ArchiveBuilder::relocate_to_requested() {
908 ro_region()->pack();
909
910 size_t my_archive_size = buffer_top() - buffer_bottom();
911
912 if (DumpSharedSpaces) {
913 _requested_static_archive_top = _requested_static_archive_bottom + my_archive_size;
914 RelocateBufferToRequested<true> patcher(this);
915 patcher.doit();
916 } else {
917 assert(DynamicDumpSharedSpaces, "must be");
918 _requested_dynamic_archive_top = _requested_dynamic_archive_bottom + my_archive_size;
919 RelocateBufferToRequested<false> patcher(this);
920 patcher.doit();
921 }
922 }
923
924 // Write detailed info to a mapfile to analyze contents of the archive.
925 // static dump:
926 // java -Xshare:dump -Xlog:cds+map=trace:file=cds.map:none:filesize=0
927 // dynamic dump:
928 // java -cp MyApp.jar -XX:ArchiveClassesAtExit=MyApp.jsa \
929 // -Xlog:cds+map=trace:file=cds.map:none:filesize=0 MyApp
930 //
931 // We need to do some address translation because the buffers used at dump time may be mapped to
932 // a different location at runtime. At dump time, the buffers may be at arbitrary locations
933 // picked by the OS. At runtime, we try to map at a fixed location (SharedBaseAddress). For
934 // consistency, we log everything using runtime addresses.
935 class ArchiveBuilder::CDSMapLogger : AllStatic {
936 static intx buffer_to_runtime_delta() {
937 // Translate the buffers used by the RW/RO regions to their eventual (requested) locations
938 // at runtime.
939 return ArchiveBuilder::current()->buffer_to_requested_delta();
940 }
941
942 // rw/ro regions only
943 static void write_dump_region(const char* name, DumpRegion* region) {
944 address region_base = address(region->base());
945 address region_top = address(region->top());
946 write_region(name, region_base, region_top, region_base + buffer_to_runtime_delta());
947 }
948
949 #define _LOG_PREFIX PTR_FORMAT ": @@ %-17s %d"
950
951 static void write_klass(Klass* k, 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, k->external_name());
955 }
956 static void write_method(Method* m, address runtime_dest, const char* type_name, int bytes, Thread* current) {
957 ResourceMark rm(current);
958 log_debug(cds, map)(_LOG_PREFIX " %s",
959 p2i(runtime_dest), type_name, bytes, m->external_name());
960 }
961
962 // rw/ro regions only
963 static void write_objects(DumpRegion* region, const ArchiveBuilder::SourceObjList* src_objs) {
964 address last_obj_base = address(region->base());
965 address last_obj_end = address(region->base());
966 address region_end = address(region->end());
967 Thread* current = Thread::current();
968 for (int i = 0; i < src_objs->objs()->length(); i++) {
969 SourceObjInfo* src_info = src_objs->at(i);
970 address src = src_info->orig_obj();
971 address dest = src_info->dumped_addr();
972 write_data(last_obj_base, dest, last_obj_base + buffer_to_runtime_delta());
973 address runtime_dest = dest + buffer_to_runtime_delta();
974 int bytes = src_info->size_in_bytes();
975
976 MetaspaceObj::Type type = src_info->msotype();
977 const char* type_name = MetaspaceObj::type_name(type);
978
979 switch (type) {
980 case MetaspaceObj::ClassType:
981 write_klass((Klass*)src, runtime_dest, type_name, bytes, current);
982 break;
983 case MetaspaceObj::ConstantPoolType:
984 write_klass(((ConstantPool*)src)->pool_holder(),
985 runtime_dest, type_name, bytes, current);
986 break;
987 case MetaspaceObj::ConstantPoolCacheType:
988 write_klass(((ConstantPoolCache*)src)->constant_pool()->pool_holder(),
989 runtime_dest, type_name, bytes, current);
990 break;
991 case MetaspaceObj::MethodType:
992 write_method((Method*)src, runtime_dest, type_name, bytes, current);
993 break;
994 case MetaspaceObj::ConstMethodType:
995 write_method(((ConstMethod*)src)->method(), runtime_dest, type_name, bytes, current);
996 break;
997 case MetaspaceObj::SymbolType:
998 {
999 ResourceMark rm(current);
1000 Symbol* s = (Symbol*)src;
1001 log_debug(cds, map)(_LOG_PREFIX " %s", p2i(runtime_dest), type_name, bytes,
1002 s->as_quoted_ascii());
1003 }
1004 break;
1005 default:
1006 log_debug(cds, map)(_LOG_PREFIX, p2i(runtime_dest), type_name, bytes);
1007 break;
1008 }
1009
1010 last_obj_base = dest;
1011 last_obj_end = dest + bytes;
1012 }
1013
1014 write_data(last_obj_base, last_obj_end, last_obj_base + buffer_to_runtime_delta());
1015 if (last_obj_end < region_end) {
1016 log_debug(cds, map)(PTR_FORMAT ": @@ Misc data " SIZE_FORMAT " bytes",
1017 p2i(last_obj_end + buffer_to_runtime_delta()),
1018 size_t(region_end - last_obj_end));
1019 write_data(last_obj_end, region_end, last_obj_end + buffer_to_runtime_delta());
1020 }
1021 }
1022
1023 #undef _LOG_PREFIX
1024
1025 // Write information about a region, whose address at dump time is [base .. top). At
1026 // runtime, this region will be mapped to runtime_base. runtime_base is 0 if this
1027 // region will be mapped at os-selected addresses (such as the bitmap region), or will
1028 // be accessed with os::read (the header).
1029 static void write_region(const char* name, address base, address top, address runtime_base) {
1030 size_t size = top - base;
1031 base = runtime_base;
1032 top = runtime_base + size;
1033 log_info(cds, map)("[%-18s " PTR_FORMAT " - " PTR_FORMAT " " SIZE_FORMAT_W(9) " bytes]",
1034 name, p2i(base), p2i(top), size);
1035 }
1036
1037 // open and closed archive regions
1038 static void write_heap_region(const char* which, GrowableArray<MemRegion> *regions) {
1039 for (int i = 0; i < regions->length(); i++) {
1040 address start = address(regions->at(i).start());
1041 address end = address(regions->at(i).end());
1042 write_region(which, start, end, start);
1043 write_data(start, end, start);
1044 }
1045 }
1046
1047 // Dump all the data [base...top). Pretend that the base address
1048 // will be mapped to runtime_base at run-time.
1049 static void write_data(address base, address top, address runtime_base) {
1050 assert(top >= base, "must be");
1051
1052 LogStreamHandle(Trace, cds, map) lsh;
1053 if (lsh.is_enabled()) {
1054 os::print_hex_dump(&lsh, base, top, sizeof(address), 32, runtime_base);
1055 }
1056 }
1057
1058 static void write_header(FileMapInfo* mapinfo) {
1059 LogStreamHandle(Info, cds, map) lsh;
1060 if (lsh.is_enabled()) {
1061 mapinfo->print(&lsh);
1062 }
1063 }
1064
1065 public:
1066 static void write(ArchiveBuilder* builder, FileMapInfo* mapinfo,
1067 GrowableArray<MemRegion> *closed_heap_regions,
1068 GrowableArray<MemRegion> *open_heap_regions,
1069 char* bitmap, size_t bitmap_size_in_bytes) {
1070 log_info(cds, map)("%s CDS archive map for %s", DumpSharedSpaces ? "Static" : "Dynamic", mapinfo->full_path());
1071
1072 address header = address(mapinfo->header());
1073 address header_end = header + mapinfo->header()->header_size();
1074 write_region("header", header, header_end, 0);
1075 write_header(mapinfo);
1076 write_data(header, header_end, 0);
1077
1078 DumpRegion* rw_region = &builder->_rw_region;
1079 DumpRegion* ro_region = &builder->_ro_region;
1080
1081 write_dump_region("rw region", rw_region);
1082 write_objects(rw_region, &builder->_rw_src_objs);
1083
1084 write_dump_region("ro region", ro_region);
1085 write_objects(ro_region, &builder->_ro_src_objs);
1086
1087 address bitmap_end = address(bitmap + bitmap_size_in_bytes);
1088 write_region("bitmap", address(bitmap), bitmap_end, 0);
1089 write_data(header, header_end, 0);
1090
1091 if (closed_heap_regions != NULL) {
1092 write_heap_region("closed heap region", closed_heap_regions);
1093 }
1094 if (open_heap_regions != NULL) {
1095 write_heap_region("open heap region", open_heap_regions);
1096 }
1097
1098 log_info(cds, map)("[End of CDS archive map]");
1099 }
1100 };
1101
1102 void ArchiveBuilder::print_stats() {
1103 _alloc_stats.print_stats(int(_ro_region.used()), int(_rw_region.used()));
1104 }
1105
1106 void ArchiveBuilder::clean_up_src_obj_table() {
1107 SrcObjTableCleaner cleaner;
1108 _src_obj_table.iterate(&cleaner);
1109 }
1110
1111 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo,
1112 GrowableArray<MemRegion>* closed_heap_regions,
1113 GrowableArray<MemRegion>* open_heap_regions,
1114 GrowableArray<ArchiveHeapOopmapInfo>* closed_heap_oopmaps,
1115 GrowableArray<ArchiveHeapOopmapInfo>* open_heap_oopmaps) {
1116 // Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with
1117 // MetaspaceShared::n_regions (internal to hotspot).
1118 assert(NUM_CDS_REGIONS == MetaspaceShared::n_regions, "sanity");
1119
1120 write_region(mapinfo, MetaspaceShared::rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false);
1121 write_region(mapinfo, MetaspaceShared::ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false);
1122
1123 size_t bitmap_size_in_bytes;
1124 char* bitmap = mapinfo->write_bitmap_region(ArchivePtrMarker::ptrmap(), closed_heap_oopmaps, open_heap_oopmaps,
1125 bitmap_size_in_bytes);
1126
1127 if (closed_heap_regions != NULL) {
1128 _total_closed_heap_region_size = mapinfo->write_heap_regions(
1129 closed_heap_regions,
1130 closed_heap_oopmaps,
1131 MetaspaceShared::first_closed_heap_region,
1132 MetaspaceShared::max_num_closed_heap_regions);
1133 _total_open_heap_region_size = mapinfo->write_heap_regions(
1134 open_heap_regions,
1135 open_heap_oopmaps,
1136 MetaspaceShared::first_open_heap_region,
1137 MetaspaceShared::max_num_open_heap_regions);
1138 }
1139
1140 print_region_stats(mapinfo, closed_heap_regions, open_heap_regions);
1141
1142 mapinfo->set_requested_base((char*)MetaspaceShared::requested_base_address());
1143 mapinfo->set_header_crc(mapinfo->compute_header_crc());
1144 // After this point, we should not write any data into mapinfo->header() since this
1145 // would corrupt its checksum we have calculated before.
1146 mapinfo->write_header();
1147 mapinfo->close();
1148
1149 if (log_is_enabled(Info, cds)) {
1150 print_stats();
1151 }
1152
1153 if (log_is_enabled(Info, cds, map)) {
1154 CDSMapLogger::write(this, mapinfo, closed_heap_regions, open_heap_regions,
1155 bitmap, bitmap_size_in_bytes);
1156 }
1157 FREE_C_HEAP_ARRAY(char, bitmap);
1158 }
1159
1160 void ArchiveBuilder::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) {
1161 mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec);
1162 }
1163
1164 void ArchiveBuilder::print_region_stats(FileMapInfo *mapinfo,
1165 GrowableArray<MemRegion>* closed_heap_regions,
1166 GrowableArray<MemRegion>* open_heap_regions) {
1167 // Print statistics of all the regions
1168 const size_t bitmap_used = mapinfo->space_at(MetaspaceShared::bm)->used();
1169 const size_t bitmap_reserved = mapinfo->space_at(MetaspaceShared::bm)->used_aligned();
1170 const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() +
1171 bitmap_reserved +
1172 _total_closed_heap_region_size +
1173 _total_open_heap_region_size;
1174 const size_t total_bytes = _ro_region.used() + _rw_region.used() +
1175 bitmap_used +
1176 _total_closed_heap_region_size +
1177 _total_open_heap_region_size;
1178 const double total_u_perc = percent_of(total_bytes, total_reserved);
1179
1180 _rw_region.print(total_reserved);
1181 _ro_region.print(total_reserved);
1182
1183 print_bitmap_region_stats(bitmap_used, total_reserved);
1184
1185 if (closed_heap_regions != NULL) {
1186 print_heap_region_stats(closed_heap_regions, "ca", total_reserved);
1187 print_heap_region_stats(open_heap_regions, "oa", total_reserved);
1188 }
1189
1190 log_debug(cds)("total : " SIZE_FORMAT_W(9) " [100.0%% of total] out of " SIZE_FORMAT_W(9) " bytes [%5.1f%% used]",
1191 total_bytes, total_reserved, total_u_perc);
1192 }
1193
1194 void ArchiveBuilder::print_bitmap_region_stats(size_t size, size_t total_size) {
1195 log_debug(cds)("bm space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used]",
1196 size, size/double(total_size)*100.0, size);
1197 }
1198
1199 void ArchiveBuilder::print_heap_region_stats(GrowableArray<MemRegion>* regions,
1200 const char *name, size_t total_size) {
1201 int arr_len = regions == NULL ? 0 : regions->length();
1202 for (int i = 0; i < arr_len; i++) {
1203 char* start = (char*)regions->at(i).start();
1204 size_t size = regions->at(i).byte_size();
1205 char* top = start + size;
1206 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,
1207 name, i, size, size/double(total_size)*100.0, size, p2i(start));
1208 }
1209 }
1210
1211 void ArchiveBuilder::report_out_of_space(const char* name, size_t needed_bytes) {
1212 // This is highly unlikely to happen on 64-bits because we have reserved a 4GB space.
1213 // On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes
1214 // or so.
1215 _rw_region.print_out_of_space_msg(name, needed_bytes);
1216 _ro_region.print_out_of_space_msg(name, needed_bytes);
1217
1218 vm_exit_during_initialization(err_msg("Unable to allocate from '%s' region", name),
1219 "Please reduce the number of shared classes.");
1220 }
1221
1222
1223 #ifndef PRODUCT
1224 void ArchiveBuilder::assert_is_vm_thread() {
1225 assert(Thread::current()->is_VM_thread(), "ArchiveBuilder should be used only inside the VMThread");
1226 }
1227 #endif