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 uintx FLAG_MASK = 0x03; // See comments around MetaspaceClosure::FLAG_MASK
120 size_t field_offset = size_t(bit_offset - _start_idx) * sizeof(address);
121 address* ptr_loc = (address*)(_dumped_obj + field_offset);
122
123 uintx old_p_and_bits = (uintx)(*ptr_loc);
124 uintx flag_bits = (old_p_and_bits & FLAG_MASK);
125 address old_p = (address)(old_p_and_bits & (~FLAG_MASK));
126 address new_p = _builder->get_dumped_addr(old_p);
127 uintx new_p_and_bits = ((uintx)new_p) | flag_bits;
128
129 log_trace(cds)("Ref: [" PTR_FORMAT "] -> " PTR_FORMAT " => " PTR_FORMAT,
130 p2i(ptr_loc), p2i(old_p), p2i(new_p));
131
132 ArchivePtrMarker::set_and_mark_pointer(ptr_loc, (address)(new_p_and_bits));
133 return true; // keep iterating the bitmap
134 }
135 };
136
137 void ArchiveBuilder::SourceObjList::relocate(int i, ArchiveBuilder* builder) {
138 SourceObjInfo* src_info = objs()->at(i);
139 assert(src_info->should_copy(), "must be");
140 BitMap::idx_t start = BitMap::idx_t(src_info->ptrmap_start()); // inclusive
141 BitMap::idx_t end = BitMap::idx_t(src_info->ptrmap_end()); // exclusive
142
143 RelocateEmbeddedPointers relocator(builder, src_info->dumped_addr(), start);
144 _ptrmap.iterate(&relocator, start, end);
145 }
146
147 ArchiveBuilder::ArchiveBuilder() :
148 _current_dump_space(NULL),
149 _buffer_bottom(NULL),
150 _last_verified_top(NULL),
151 _num_dump_regions_used(0),
152 _other_region_used_bytes(0),
153 _requested_static_archive_bottom(NULL),
154 _requested_static_archive_top(NULL),
155 _requested_dynamic_archive_bottom(NULL),
156 _requested_dynamic_archive_top(NULL),
157 _mapped_static_archive_bottom(NULL),
158 _mapped_static_archive_top(NULL),
159 _buffer_to_requested_delta(0),
160 _rw_region("rw", MAX_SHARED_DELTA),
161 _ro_region("ro", MAX_SHARED_DELTA),
162 _rw_src_objs(),
163 _ro_src_objs(),
164 _src_obj_table(INITIAL_TABLE_SIZE),
165 _num_instance_klasses(0),
166 _num_obj_array_klasses(0),
167 _num_type_array_klasses(0),
168 _total_closed_heap_region_size(0),
169 _total_open_heap_region_size(0),
170 _estimated_metaspaceobj_bytes(0),
171 _estimated_hashtable_bytes(0)
172 {
173 _klasses = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<Klass*>(4 * K, mtClassShared);
174 _symbols = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<Symbol*>(256 * K, mtClassShared);
175 _special_refs = new (ResourceObj::C_HEAP, mtClassShared) GrowableArray<SpecialRefInfo>(24 * K, mtClassShared);
176
177 assert(_current == NULL, "must be");
178 _current = this;
179 }
180
181 ArchiveBuilder::~ArchiveBuilder() {
182 assert(_current == this, "must be");
183 _current = NULL;
184
185 clean_up_src_obj_table();
186
187 for (int i = 0; i < _symbols->length(); i++) {
188 _symbols->at(i)->decrement_refcount();
189 }
190
191 delete _klasses;
192 delete _symbols;
193 delete _special_refs;
194 }
195
196 bool ArchiveBuilder::is_dumping_full_module_graph() {
197 return DumpSharedSpaces && MetaspaceShared::use_full_module_graph();
198 }
199
200 class GatherKlassesAndSymbols : public UniqueMetaspaceClosure {
201 ArchiveBuilder* _builder;
202
203 public:
204 GatherKlassesAndSymbols(ArchiveBuilder* builder) : _builder(builder) {}
205
206 virtual bool do_unique_ref(Ref* ref, bool read_only) {
207 return _builder->gather_klass_and_symbol(ref, read_only);
208 }
209 };
210
211 bool ArchiveBuilder::gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only) {
212 if (ref->obj() == NULL) {
213 return false;
214 }
215 if (get_follow_mode(ref) != make_a_copy) {
216 return false;
217 }
218 if (ref->msotype() == MetaspaceObj::ClassType) {
219 Klass* klass = (Klass*)ref->obj();
220 assert(klass->is_klass(), "must be");
221 if (!is_excluded(klass)) {
222 _klasses->append(klass);
223 if (klass->is_instance_klass()) {
224 _num_instance_klasses ++;
225 } else if (klass->is_objArray_klass()) {
226 _num_obj_array_klasses ++;
227 } else {
228 assert(klass->is_typeArray_klass(), "sanity");
229 _num_type_array_klasses ++;
230 }
231 }
232 // See RunTimeSharedClassInfo::get_for()
233 _estimated_metaspaceobj_bytes += align_up(BytesPerWord, SharedSpaceObjectAlignment);
234 } else if (ref->msotype() == MetaspaceObj::SymbolType) {
235 // Make sure the symbol won't be GC'ed while we are dumping the archive.
236 Symbol* sym = (Symbol*)ref->obj();
237 sym->increment_refcount();
238 _symbols->append(sym);
239 }
240
241 int bytes = ref->size() * BytesPerWord;
242 _estimated_metaspaceobj_bytes += align_up(bytes, SharedSpaceObjectAlignment);
243
244 return true; // recurse
245 }
246
247 void ArchiveBuilder::gather_klasses_and_symbols() {
248 ResourceMark rm;
249 log_info(cds)("Gathering classes and symbols ... ");
250 GatherKlassesAndSymbols doit(this);
251 iterate_roots(&doit, /*is_relocating_pointers=*/false);
252 #if INCLUDE_CDS_JAVA_HEAP
253 if (is_dumping_full_module_graph()) {
254 ClassLoaderDataShared::iterate_symbols(&doit);
255 }
256 #endif
257 doit.finish();
258
259 log_info(cds)("Number of classes %d", _num_instance_klasses + _num_obj_array_klasses + _num_type_array_klasses);
260 log_info(cds)(" instance classes = %5d", _num_instance_klasses);
261 log_info(cds)(" obj array classes = %5d", _num_obj_array_klasses);
262 log_info(cds)(" type array classes = %5d", _num_type_array_klasses);
263 log_info(cds)(" symbols = %5d", _symbols->length());
264
265 if (DumpSharedSpaces) {
266 // To ensure deterministic contents in the static archive, we need to ensure that
267 // we iterate the MetaspaceObjs in a deterministic order. It doesn't matter where
268 // the MetaspaceObjs are located originally, as they are copied sequentially into
269 // the archive during the iteration.
270 //
271 // The only issue here is that the symbol table and the system directories may be
272 // randomly ordered, so we copy the symbols and klasses into two arrays and sort
273 // them deterministically.
274 //
275 // During -Xshare:dump, the order of Symbol creation is strictly determined by
276 // the SharedClassListFile (class loading is done in a single thread and the JIT
277 // is disabled). Also, Symbols are allocated in monotonically increasing addresses
278 // (see Symbol::operator new(size_t, int)). So if we iterate the Symbols by
279 // ascending address order, we ensure that all Symbols are copied into deterministic
280 // locations in the archive.
281 //
282 // TODO: in the future, if we want to produce deterministic contents in the
283 // dynamic archive, we might need to sort the symbols alphabetically (also see
284 // DynamicArchiveBuilder::sort_methods()).
285 sort_symbols_and_fix_hash();
286 sort_klasses();
287
288 // TODO -- we need a proper estimate for the archived modules, etc,
289 // but this should be enough for now
290 _estimated_metaspaceobj_bytes += 200 * 1024 * 1024;
291 }
292 }
293
294 int ArchiveBuilder::compare_symbols_by_address(Symbol** a, Symbol** b) {
295 if (a[0] < b[0]) {
296 return -1;
297 } else {
298 assert(a[0] > b[0], "Duplicated symbol %s unexpected", (*a)->as_C_string());
299 return 1;
300 }
301 }
302
303 void ArchiveBuilder::sort_symbols_and_fix_hash() {
304 log_info(cds)("Sorting symbols and fixing identity hash ... ");
305 os::init_random(0x12345678);
306 _symbols->sort(compare_symbols_by_address);
307 for (int i = 0; i < _symbols->length(); i++) {
308 assert(_symbols->at(i)->is_permanent(), "archived symbols must be permanent");
309 _symbols->at(i)->update_identity_hash();
310 }
311 }
312
313 int ArchiveBuilder::compare_klass_by_name(Klass** a, Klass** b) {
314 return a[0]->name()->fast_compare(b[0]->name());
315 }
316
317 void ArchiveBuilder::sort_klasses() {
318 log_info(cds)("Sorting classes ... ");
319 _klasses->sort(compare_klass_by_name);
320 }
321
322 size_t ArchiveBuilder::estimate_archive_size() {
323 // size of the symbol table and two dictionaries, plus the RunTimeSharedClassInfo's
324 size_t symbol_table_est = SymbolTable::estimate_size_for_archive();
325 size_t dictionary_est = SystemDictionaryShared::estimate_size_for_archive();
326 _estimated_hashtable_bytes = symbol_table_est + dictionary_est;
327
328 size_t total = 0;
329
330 total += _estimated_metaspaceobj_bytes;
331 total += _estimated_hashtable_bytes;
332
333 // allow fragmentation at the end of each dump region
334 total += _total_dump_regions * MetaspaceShared::core_region_alignment();
335
336 log_info(cds)("_estimated_hashtable_bytes = " SIZE_FORMAT " + " SIZE_FORMAT " = " SIZE_FORMAT,
337 symbol_table_est, dictionary_est, _estimated_hashtable_bytes);
338 log_info(cds)("_estimated_metaspaceobj_bytes = " SIZE_FORMAT, _estimated_metaspaceobj_bytes);
339 log_info(cds)("total estimate bytes = " SIZE_FORMAT, total);
340
341 return align_up(total, MetaspaceShared::core_region_alignment());
342 }
343
344 address ArchiveBuilder::reserve_buffer() {
345 size_t buffer_size = estimate_archive_size();
346 ReservedSpace rs(buffer_size, MetaspaceShared::core_region_alignment(), os::vm_page_size());
347 if (!rs.is_reserved()) {
348 log_error(cds)("Failed to reserve " SIZE_FORMAT " bytes of output buffer.", buffer_size);
349 vm_direct_exit(0);
350 }
351
352 // buffer_bottom is the lowest address of the 2 core regions (rw, ro) when
353 // we are copying the class metadata into the buffer.
354 address buffer_bottom = (address)rs.base();
355 log_info(cds)("Reserved output buffer space at " PTR_FORMAT " [" SIZE_FORMAT " bytes]",
356 p2i(buffer_bottom), buffer_size);
357 _shared_rs = rs;
358
359 _buffer_bottom = buffer_bottom;
360 _last_verified_top = buffer_bottom;
361 _current_dump_space = &_rw_region;
362 _num_dump_regions_used = 1;
363 _other_region_used_bytes = 0;
364 _current_dump_space->init(&_shared_rs, &_shared_vs);
365
366 ArchivePtrMarker::initialize(&_ptrmap, &_shared_vs);
367
368 // The bottom of the static archive should be mapped at this address by default.
369 _requested_static_archive_bottom = (address)MetaspaceShared::requested_base_address();
370
371 // The bottom of the archive (that I am writing now) should be mapped at this address by default.
372 address my_archive_requested_bottom;
373
374 if (DumpSharedSpaces) {
375 my_archive_requested_bottom = _requested_static_archive_bottom;
376 } else {
377 _mapped_static_archive_bottom = (address)MetaspaceObj::shared_metaspace_base();
378 _mapped_static_archive_top = (address)MetaspaceObj::shared_metaspace_top();
379 assert(_mapped_static_archive_top >= _mapped_static_archive_bottom, "must be");
380 size_t static_archive_size = _mapped_static_archive_top - _mapped_static_archive_bottom;
381
382 // At run time, we will mmap the dynamic archive at my_archive_requested_bottom
383 _requested_static_archive_top = _requested_static_archive_bottom + static_archive_size;
384 my_archive_requested_bottom = align_up(_requested_static_archive_top, MetaspaceShared::core_region_alignment());
385
386 _requested_dynamic_archive_bottom = my_archive_requested_bottom;
387 }
388
389 _buffer_to_requested_delta = my_archive_requested_bottom - _buffer_bottom;
390
391 address my_archive_requested_top = my_archive_requested_bottom + buffer_size;
392 if (my_archive_requested_bottom < _requested_static_archive_bottom ||
393 my_archive_requested_top <= _requested_static_archive_bottom) {
394 // Size overflow.
395 log_error(cds)("my_archive_requested_bottom = " INTPTR_FORMAT, p2i(my_archive_requested_bottom));
396 log_error(cds)("my_archive_requested_top = " INTPTR_FORMAT, p2i(my_archive_requested_top));
397 log_error(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is too high. "
398 "Please rerun java -Xshare:dump with a lower value", p2i(_requested_static_archive_bottom));
399 vm_direct_exit(0);
400 }
401
402 if (DumpSharedSpaces) {
403 // We don't want any valid object to be at the very bottom of the archive.
404 // See ArchivePtrMarker::mark_pointer().
405 rw_region()->allocate(16);
406 }
407
408 return buffer_bottom;
409 }
410
411 void ArchiveBuilder::iterate_sorted_roots(MetaspaceClosure* it, bool is_relocating_pointers) {
412 int i;
413
414 if (!is_relocating_pointers) {
415 // Don't relocate _symbol, so we can safely call decrement_refcount on the
416 // original symbols.
417 int num_symbols = _symbols->length();
418 for (i = 0; i < num_symbols; i++) {
419 it->push(_symbols->adr_at(i));
420 }
421 }
422
423 int num_klasses = _klasses->length();
424 for (i = 0; i < num_klasses; i++) {
425 it->push(_klasses->adr_at(i));
426 }
427
428 iterate_roots(it, is_relocating_pointers);
429 }
430
431 class GatherSortedSourceObjs : public MetaspaceClosure {
432 ArchiveBuilder* _builder;
433
434 public:
435 GatherSortedSourceObjs(ArchiveBuilder* builder) : _builder(builder) {}
436
437 virtual bool do_ref(Ref* ref, bool read_only) {
438 return _builder->gather_one_source_obj(enclosing_ref(), ref, read_only);
439 }
440
441 virtual void push_special(SpecialRef type, Ref* ref, intptr_t* p) {
442 assert(type == _method_entry_ref, "only special type allowed for now");
443 address src_obj = ref->obj();
444 size_t field_offset = pointer_delta(p, src_obj, sizeof(u1));
445 _builder->add_special_ref(type, src_obj, field_offset);
446 };
447
448 virtual void do_pending_ref(Ref* ref) {
449 if (ref->obj() != NULL) {
450 _builder->remember_embedded_pointer_in_copied_obj(enclosing_ref(), ref);
451 }
452 }
453 };
454
455 bool ArchiveBuilder::gather_one_source_obj(MetaspaceClosure::Ref* enclosing_ref,
456 MetaspaceClosure::Ref* ref, bool read_only) {
457 address src_obj = ref->obj();
458 if (src_obj == NULL) {
459 return false;
460 }
461 ref->set_keep_after_pushing();
462 remember_embedded_pointer_in_copied_obj(enclosing_ref, ref);
463
464 FollowMode follow_mode = get_follow_mode(ref);
465 SourceObjInfo src_info(ref, read_only, follow_mode);
466 bool created;
467 SourceObjInfo* p = _src_obj_table.add_if_absent(src_obj, src_info, &created);
468 if (created) {
469 if (_src_obj_table.maybe_grow(MAX_TABLE_SIZE)) {
470 log_info(cds, hashtables)("Expanded _src_obj_table table to %d", _src_obj_table.table_size());
471 }
472 }
473
474 assert(p->read_only() == src_info.read_only(), "must be");
475
476 if (created && src_info.should_copy()) {
477 ref->set_user_data((void*)p);
478 if (read_only) {
479 _ro_src_objs.append(enclosing_ref, p);
480 } else {
481 _rw_src_objs.append(enclosing_ref, p);
482 }
483 return true; // Need to recurse into this ref only if we are copying it
484 } else {
485 return false;
486 }
487 }
488
489 void ArchiveBuilder::add_special_ref(MetaspaceClosure::SpecialRef type, address src_obj, size_t field_offset) {
490 _special_refs->append(SpecialRefInfo(type, src_obj, field_offset));
491 }
492
493 void ArchiveBuilder::remember_embedded_pointer_in_copied_obj(MetaspaceClosure::Ref* enclosing_ref,
494 MetaspaceClosure::Ref* ref) {
495 assert(ref->obj() != NULL, "should have checked");
496
497 if (enclosing_ref != NULL) {
498 SourceObjInfo* src_info = (SourceObjInfo*)enclosing_ref->user_data();
499 if (src_info == NULL) {
500 // source objects of point_to_it/set_to_null types are not copied
501 // so we don't need to remember their pointers.
502 } else {
503 if (src_info->read_only()) {
504 _ro_src_objs.remember_embedded_pointer(src_info, ref);
505 } else {
506 _rw_src_objs.remember_embedded_pointer(src_info, ref);
507 }
508 }
509 }
510 }
511
512 void ArchiveBuilder::gather_source_objs() {
513 ResourceMark rm;
514 log_info(cds)("Gathering all archivable objects ... ");
515 gather_klasses_and_symbols();
516 GatherSortedSourceObjs doit(this);
517 iterate_sorted_roots(&doit, /*is_relocating_pointers=*/false);
518 doit.finish();
519 }
520
521 bool ArchiveBuilder::is_excluded(Klass* klass) {
522 if (klass->is_instance_klass()) {
523 InstanceKlass* ik = InstanceKlass::cast(klass);
524 return SystemDictionaryShared::is_excluded_class(ik);
525 } else if (klass->is_objArray_klass()) {
526 if (DynamicDumpSharedSpaces) {
527 // Don't support archiving of array klasses for now (WHY???)
528 return true;
529 }
530 Klass* bottom = ObjArrayKlass::cast(klass)->bottom_klass();
531 if (bottom->is_instance_klass()) {
532 return SystemDictionaryShared::is_excluded_class(InstanceKlass::cast(bottom));
533 }
534 }
535
536 return false;
537 }
538
539 ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref *ref) {
540 address obj = ref->obj();
541 if (MetaspaceShared::is_in_shared_metaspace(obj)) {
542 // Don't dump existing shared metadata again.
543 return point_to_it;
544 } else if (ref->msotype() == MetaspaceObj::MethodDataType) {
545 return set_to_null;
546 } else {
547 if (ref->msotype() == MetaspaceObj::ClassType) {
548 Klass* klass = (Klass*)ref->obj();
549 assert(klass->is_klass(), "must be");
550 if (is_excluded(klass)) {
551 ResourceMark rm;
552 log_debug(cds, dynamic)("Skipping class (excluded): %s", klass->external_name());
553 return set_to_null;
554 }
555 }
556
557 return make_a_copy;
558 }
559 }
560
561 void ArchiveBuilder::start_dump_space(DumpRegion* next) {
562 address bottom = _last_verified_top;
563 address top = (address)(current_dump_space()->top());
564 _other_region_used_bytes += size_t(top - bottom);
565
566 current_dump_space()->pack(next);
567 _current_dump_space = next;
568 _num_dump_regions_used ++;
569
570 _last_verified_top = (address)(current_dump_space()->top());
571 }
572
573 void ArchiveBuilder::verify_estimate_size(size_t estimate, const char* which) {
574 address bottom = _last_verified_top;
575 address top = (address)(current_dump_space()->top());
576 size_t used = size_t(top - bottom) + _other_region_used_bytes;
577 int diff = int(estimate) - int(used);
578
579 log_info(cds)("%s estimate = " SIZE_FORMAT " used = " SIZE_FORMAT "; diff = %d bytes", which, estimate, used, diff);
580 assert(diff >= 0, "Estimate is too small");
581
582 _last_verified_top = top;
583 _other_region_used_bytes = 0;
584 }
585
586 void ArchiveBuilder::dump_rw_metadata() {
587 ResourceMark rm;
588 log_info(cds)("Allocating RW objects ... ");
589 make_shallow_copies(&_rw_region, &_rw_src_objs);
590
591 #if INCLUDE_CDS_JAVA_HEAP
592 if (is_dumping_full_module_graph()) {
593 // Archive the ModuleEntry's and PackageEntry's of the 3 built-in loaders
594 char* start = rw_region()->top();
595 ClassLoaderDataShared::allocate_archived_tables();
596 alloc_stats()->record_modules(rw_region()->top() - start, /*read_only*/false);
597 }
598 #endif
599 }
600
601 void ArchiveBuilder::dump_ro_metadata() {
602 ResourceMark rm;
603 log_info(cds)("Allocating RO objects ... ");
604
605 start_dump_space(&_ro_region);
606 make_shallow_copies(&_ro_region, &_ro_src_objs);
607
608 #if INCLUDE_CDS_JAVA_HEAP
609 if (is_dumping_full_module_graph()) {
610 char* start = ro_region()->top();
611 ClassLoaderDataShared::init_archived_tables();
612 alloc_stats()->record_modules(ro_region()->top() - start, /*read_only*/true);
613 }
614 #endif
615 }
616
617 void ArchiveBuilder::make_shallow_copies(DumpRegion *dump_region,
618 const ArchiveBuilder::SourceObjList* src_objs) {
619 for (int i = 0; i < src_objs->objs()->length(); i++) {
620 make_shallow_copy(dump_region, src_objs->objs()->at(i));
621 }
622 log_info(cds)("done (%d objects)", src_objs->objs()->length());
623 }
624
625 void ArchiveBuilder::make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info) {
626 MetaspaceClosure::Ref* ref = src_info->ref();
627 address src = ref->obj();
628 int bytes = src_info->size_in_bytes();
629 char* dest;
630 char* oldtop;
631 char* newtop;
632
633 oldtop = dump_region->top();
634 if (ref->msotype() == MetaspaceObj::ClassType) {
635 // Save a pointer immediate in front of an InstanceKlass, so
636 // we can do a quick lookup from InstanceKlass* -> RunTimeSharedClassInfo*
637 // without building another hashtable. See RunTimeSharedClassInfo::get_for()
638 // in systemDictionaryShared.cpp.
639 Klass* klass = (Klass*)src;
640 if (klass->is_instance_klass()) {
641 SystemDictionaryShared::validate_before_archiving(InstanceKlass::cast(klass));
642 dump_region->allocate(sizeof(address));
643 }
644 }
645 dest = dump_region->allocate(bytes);
646 newtop = dump_region->top();
647
648 memcpy(dest, src, bytes);
649
650 intptr_t* archived_vtable = CppVtables::get_archived_vtable(ref->msotype(), (address)dest);
651 if (archived_vtable != NULL) {
652 *(address*)dest = (address)archived_vtable;
653 ArchivePtrMarker::mark_pointer((address*)dest);
654 }
655
656 log_trace(cds)("Copy: " PTR_FORMAT " ==> " PTR_FORMAT " %d", p2i(src), p2i(dest), bytes);
657 src_info->set_dumped_addr((address)dest);
658
659 _alloc_stats.record(ref->msotype(), int(newtop - oldtop), src_info->read_only());
660 }
661
662 address ArchiveBuilder::get_dumped_addr(address src_obj) const {
663 SourceObjInfo* p = _src_obj_table.lookup(src_obj);
664 assert(p != NULL, "must be");
665
666 return p->dumped_addr();
667 }
668
669 void ArchiveBuilder::relocate_embedded_pointers(ArchiveBuilder::SourceObjList* src_objs) {
670 for (int i = 0; i < src_objs->objs()->length(); i++) {
671 src_objs->relocate(i, this);
672 }
673 }
674
675 void ArchiveBuilder::update_special_refs() {
676 for (int i = 0; i < _special_refs->length(); i++) {
677 SpecialRefInfo s = _special_refs->at(i);
678 size_t field_offset = s.field_offset();
679 address src_obj = s.src_obj();
680 address dst_obj = get_dumped_addr(src_obj);
681 intptr_t* src_p = (intptr_t*)(src_obj + field_offset);
682 intptr_t* dst_p = (intptr_t*)(dst_obj + field_offset);
683 assert(s.type() == MetaspaceClosure::_method_entry_ref, "only special type allowed for now");
684
685 assert(*src_p == *dst_p, "must be a copy");
686 ArchivePtrMarker::mark_pointer((address*)dst_p);
687 }
688 }
689
690 class RefRelocator: public MetaspaceClosure {
691 ArchiveBuilder* _builder;
692
693 public:
694 RefRelocator(ArchiveBuilder* builder) : _builder(builder) {}
695
696 virtual bool do_ref(Ref* ref, bool read_only) {
697 if (ref->not_null()) {
698 ref->update(_builder->get_dumped_addr(ref->obj()));
699 ArchivePtrMarker::mark_pointer(ref->addr());
700 }
701 return false; // Do not recurse.
702 }
703 };
704
705 void ArchiveBuilder::relocate_roots() {
706 log_info(cds)("Relocating external roots ... ");
707 ResourceMark rm;
708 RefRelocator doit(this);
709 iterate_sorted_roots(&doit, /*is_relocating_pointers=*/true);
710 doit.finish();
711 log_info(cds)("done");
712 }
713
714 void ArchiveBuilder::relocate_metaspaceobj_embedded_pointers() {
715 log_info(cds)("Relocating embedded pointers in core regions ... ");
716 relocate_embedded_pointers(&_rw_src_objs);
717 relocate_embedded_pointers(&_ro_src_objs);
718 update_special_refs();
719 }
720
721 // We must relocate vmClasses::_klasses[] only after we have copied the
722 // java objects in during dump_java_heap_objects(): during the object copy, we operate on
723 // old objects which assert that their klass is the original klass.
724 void ArchiveBuilder::relocate_vm_classes() {
725 log_info(cds)("Relocating vmClasses::_klasses[] ... ");
726 ResourceMark rm;
727 RefRelocator doit(this);
728 vmClasses::metaspace_pointers_do(&doit);
729 }
730
731 void ArchiveBuilder::make_klasses_shareable() {
732 for (int i = 0; i < klasses()->length(); i++) {
733 Klass* k = klasses()->at(i);
734 k->remove_java_mirror();
735 #ifdef _LP64
736 if (UseCompactObjectHeaders) {
737 Klass* requested_k = to_requested(k);
738 narrowKlass nk = CompressedKlassPointers::encode_not_null(requested_k, _requested_static_archive_bottom);
739 k->set_prototype_header(markWord::prototype().set_narrow_klass(nk));
740 }
741 #endif //_LP64
742 if (k->is_objArray_klass()) {
743 // InstanceKlass and TypeArrayKlass will in turn call remove_unshareable_info
744 // on their array classes.
745 } else if (k->is_typeArray_klass()) {
746 k->remove_unshareable_info();
747 } else {
748 assert(k->is_instance_klass(), " must be");
749 InstanceKlass* ik = InstanceKlass::cast(k);
750 if (DynamicDumpSharedSpaces) {
751 // For static dump, class loader type are already set.
752 ik->assign_class_loader_type();
753 }
754
755 MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread::current(), ik);
756 ik->remove_unshareable_info();
757
758 if (log_is_enabled(Debug, cds, class)) {
759 ResourceMark rm;
760 log_debug(cds, class)("klasses[%4d] = " PTR_FORMAT " %s", i, p2i(to_requested(ik)), ik->external_name());
761 }
762 }
763 }
764 }
765
766 uintx ArchiveBuilder::buffer_to_offset(address p) const {
767 address requested_p = to_requested(p);
768 assert(requested_p >= _requested_static_archive_bottom, "must be");
769 return requested_p - _requested_static_archive_bottom;
770 }
771
772 uintx ArchiveBuilder::any_to_offset(address p) const {
773 if (is_in_mapped_static_archive(p)) {
774 assert(DynamicDumpSharedSpaces, "must be");
775 return p - _mapped_static_archive_bottom;
776 }
777 return buffer_to_offset(p);
778 }
779
780 // Update a Java object to point its Klass* to the new location after
781 // shared archive has been compacted.
782 void ArchiveBuilder::relocate_klass_ptr(oop o) {
783 #ifdef _LP64
784 assert(DumpSharedSpaces, "sanity");
785 Klass* k = get_relocated_klass(o->klass());
786 Klass* requested_k = to_requested(k);
787 narrowKlass nk = CompressedKlassPointers::encode_not_null(requested_k, _requested_static_archive_bottom);
788 if (UseCompactObjectHeaders) {
789 o->set_mark(o->mark().set_narrow_klass(nk));
790 } else {
791 o->set_narrow_klass(nk);
792 }
793 #endif // _LP64
794 }
795
796 // RelocateBufferToRequested --- Relocate all the pointers in rw/ro,
797 // so that the archive can be mapped to the "requested" location without runtime relocation.
798 //
799 // - See ArchiveBuilder header for the definition of "buffer", "mapped" and "requested"
800 // - ArchivePtrMarker::ptrmap() marks all the pointers in the rw/ro regions
801 // - Every pointer must have one of the following values:
802 // [a] NULL:
803 // No relocation is needed. Remove this pointer from ptrmap so we don't need to
804 // consider it at runtime.
805 // [b] Points into an object X which is inside the buffer:
806 // Adjust this pointer by _buffer_to_requested_delta, so it points to X
807 // when the archive is mapped at the requested location.
808 // [c] Points into an object Y which is inside mapped static archive:
809 // - This happens only during dynamic dump
810 // - Adjust this pointer by _mapped_to_requested_static_archive_delta,
811 // so it points to Y when the static archive is mapped at the requested location.
812 template <bool STATIC_DUMP>
813 class RelocateBufferToRequested : public BitMapClosure {
814 ArchiveBuilder* _builder;
815 address _buffer_bottom;
816 intx _buffer_to_requested_delta;
817 intx _mapped_to_requested_static_archive_delta;
818 size_t _max_non_null_offset;
819
820 public:
821 RelocateBufferToRequested(ArchiveBuilder* builder) {
822 _builder = builder;
823 _buffer_bottom = _builder->buffer_bottom();
824 _buffer_to_requested_delta = builder->buffer_to_requested_delta();
825 _mapped_to_requested_static_archive_delta = builder->requested_static_archive_bottom() - builder->mapped_static_archive_bottom();
826 _max_non_null_offset = 0;
827
828 address bottom = _builder->buffer_bottom();
829 address top = _builder->buffer_top();
830 address new_bottom = bottom + _buffer_to_requested_delta;
831 address new_top = top + _buffer_to_requested_delta;
832 log_debug(cds)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT "] to "
833 "[" INTPTR_FORMAT " - " INTPTR_FORMAT "]",
834 p2i(bottom), p2i(top),
835 p2i(new_bottom), p2i(new_top));
836 }
837
838 bool do_bit(size_t offset) {
839 address* p = (address*)_buffer_bottom + offset;
840 assert(_builder->is_in_buffer_space(p), "pointer must live in buffer space");
841
842 if (*p == NULL) {
843 // todo -- clear bit, etc
844 ArchivePtrMarker::ptrmap()->clear_bit(offset);
845 } else {
846 if (STATIC_DUMP) {
847 assert(_builder->is_in_buffer_space(*p), "old pointer must point inside buffer space");
848 *p += _buffer_to_requested_delta;
849 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive");
850 } else {
851 if (_builder->is_in_buffer_space(*p)) {
852 *p += _buffer_to_requested_delta;
853 // assert is in requested dynamic archive
854 } else {
855 assert(_builder->is_in_mapped_static_archive(*p), "old pointer must point inside buffer space or mapped static archive");
856 *p += _mapped_to_requested_static_archive_delta;
857 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive");
858 }
859 }
860 _max_non_null_offset = offset;
861 }
862
863 return true; // keep iterating
864 }
865
866 void doit() {
867 ArchivePtrMarker::ptrmap()->iterate(this);
868 ArchivePtrMarker::compact(_max_non_null_offset);
869 }
870 };
871
872
873 void ArchiveBuilder::relocate_to_requested() {
874 ro_region()->pack();
875
876 size_t my_archive_size = buffer_top() - buffer_bottom();
877
878 if (DumpSharedSpaces) {
879 _requested_static_archive_top = _requested_static_archive_bottom + my_archive_size;
880 RelocateBufferToRequested<true> patcher(this);
881 patcher.doit();
882 } else {
883 assert(DynamicDumpSharedSpaces, "must be");
884 _requested_dynamic_archive_top = _requested_dynamic_archive_bottom + my_archive_size;
885 RelocateBufferToRequested<false> patcher(this);
886 patcher.doit();
887 }
888 }
889
890 // Write detailed info to a mapfile to analyze contents of the archive.
891 // static dump:
892 // java -Xshare:dump -Xlog:cds+map=trace:file=cds.map:none:filesize=0
893 // dynamic dump:
894 // java -cp MyApp.jar -XX:ArchiveClassesAtExit=MyApp.jsa \
895 // -Xlog:cds+map=trace:file=cds.map:none:filesize=0 MyApp
896 //
897 // We need to do some address translation because the buffers used at dump time may be mapped to
898 // a different location at runtime. At dump time, the buffers may be at arbitrary locations
899 // picked by the OS. At runtime, we try to map at a fixed location (SharedBaseAddress). For
900 // consistency, we log everything using runtime addresses.
901 class ArchiveBuilder::CDSMapLogger : AllStatic {
902 static intx buffer_to_runtime_delta() {
903 // Translate the buffers used by the RW/RO regions to their eventual (requested) locations
904 // at runtime.
905 return ArchiveBuilder::current()->buffer_to_requested_delta();
906 }
907
908 // rw/ro regions only
909 static void write_dump_region(const char* name, DumpRegion* region) {
910 address region_base = address(region->base());
911 address region_top = address(region->top());
912 write_region(name, region_base, region_top, region_base + buffer_to_runtime_delta());
913 }
914
915 #define _LOG_PREFIX PTR_FORMAT ": @@ %-17s %d"
916
917 static void write_klass(Klass* k, address runtime_dest, const char* type_name, int bytes, Thread* current) {
918 ResourceMark rm(current);
919 log_debug(cds, map)(_LOG_PREFIX " %s",
920 p2i(runtime_dest), type_name, bytes, k->external_name());
921 }
922 static void write_method(Method* m, address runtime_dest, const char* type_name, int bytes, Thread* current) {
923 ResourceMark rm(current);
924 log_debug(cds, map)(_LOG_PREFIX " %s",
925 p2i(runtime_dest), type_name, bytes, m->external_name());
926 }
927
928 // rw/ro regions only
929 static void write_objects(DumpRegion* region, const ArchiveBuilder::SourceObjList* src_objs) {
930 address last_obj_base = address(region->base());
931 address last_obj_end = address(region->base());
932 address region_end = address(region->end());
933 Thread* current = Thread::current();
934 for (int i = 0; i < src_objs->objs()->length(); i++) {
935 SourceObjInfo* src_info = src_objs->at(i);
936 address src = src_info->orig_obj();
937 address dest = src_info->dumped_addr();
938 write_data(last_obj_base, dest, last_obj_base + buffer_to_runtime_delta());
939 address runtime_dest = dest + buffer_to_runtime_delta();
940 int bytes = src_info->size_in_bytes();
941
942 MetaspaceObj::Type type = src_info->msotype();
943 const char* type_name = MetaspaceObj::type_name(type);
944
945 switch (type) {
946 case MetaspaceObj::ClassType:
947 write_klass((Klass*)src, runtime_dest, type_name, bytes, current);
948 break;
949 case MetaspaceObj::ConstantPoolType:
950 write_klass(((ConstantPool*)src)->pool_holder(),
951 runtime_dest, type_name, bytes, current);
952 break;
953 case MetaspaceObj::ConstantPoolCacheType:
954 write_klass(((ConstantPoolCache*)src)->constant_pool()->pool_holder(),
955 runtime_dest, type_name, bytes, current);
956 break;
957 case MetaspaceObj::MethodType:
958 write_method((Method*)src, runtime_dest, type_name, bytes, current);
959 break;
960 case MetaspaceObj::ConstMethodType:
961 write_method(((ConstMethod*)src)->method(), runtime_dest, type_name, bytes, current);
962 break;
963 case MetaspaceObj::SymbolType:
964 {
965 ResourceMark rm(current);
966 Symbol* s = (Symbol*)src;
967 log_debug(cds, map)(_LOG_PREFIX " %s", p2i(runtime_dest), type_name, bytes,
968 s->as_quoted_ascii());
969 }
970 break;
971 default:
972 log_debug(cds, map)(_LOG_PREFIX, p2i(runtime_dest), type_name, bytes);
973 break;
974 }
975
976 last_obj_base = dest;
977 last_obj_end = dest + bytes;
978 }
979
980 write_data(last_obj_base, last_obj_end, last_obj_base + buffer_to_runtime_delta());
981 if (last_obj_end < region_end) {
982 log_debug(cds, map)(PTR_FORMAT ": @@ Misc data " SIZE_FORMAT " bytes",
983 p2i(last_obj_end + buffer_to_runtime_delta()),
984 size_t(region_end - last_obj_end));
985 write_data(last_obj_end, region_end, last_obj_end + buffer_to_runtime_delta());
986 }
987 }
988
989 #undef _LOG_PREFIX
990
991 // Write information about a region, whose address at dump time is [base .. top). At
992 // runtime, this region will be mapped to runtime_base. runtime_base is 0 if this
993 // region will be mapped at os-selected addresses (such as the bitmap region), or will
994 // be accessed with os::read (the header).
995 static void write_region(const char* name, address base, address top, address runtime_base) {
996 size_t size = top - base;
997 base = runtime_base;
998 top = runtime_base + size;
999 log_info(cds, map)("[%-18s " PTR_FORMAT " - " PTR_FORMAT " " SIZE_FORMAT_W(9) " bytes]",
1000 name, p2i(base), p2i(top), size);
1001 }
1002
1003 // open and closed archive regions
1004 static void write_heap_region(const char* which, GrowableArray<MemRegion> *regions) {
1005 for (int i = 0; i < regions->length(); i++) {
1006 address start = address(regions->at(i).start());
1007 address end = address(regions->at(i).end());
1008 write_region(which, start, end, start);
1009 write_data(start, end, start);
1010 }
1011 }
1012
1013 // Dump all the data [base...top). Pretend that the base address
1014 // will be mapped to runtime_base at run-time.
1015 static void write_data(address base, address top, address runtime_base) {
1016 assert(top >= base, "must be");
1017
1018 LogStreamHandle(Trace, cds, map) lsh;
1019 if (lsh.is_enabled()) {
1020 os::print_hex_dump(&lsh, base, top, sizeof(address), 32, runtime_base);
1021 }
1022 }
1023
1024 static void write_header(FileMapInfo* mapinfo) {
1025 LogStreamHandle(Info, cds, map) lsh;
1026 if (lsh.is_enabled()) {
1027 mapinfo->print(&lsh);
1028 }
1029 }
1030
1031 public:
1032 static void write(ArchiveBuilder* builder, FileMapInfo* mapinfo,
1033 GrowableArray<MemRegion> *closed_heap_regions,
1034 GrowableArray<MemRegion> *open_heap_regions,
1035 char* bitmap, size_t bitmap_size_in_bytes) {
1036 log_info(cds, map)("%s CDS archive map for %s", DumpSharedSpaces ? "Static" : "Dynamic", mapinfo->full_path());
1037
1038 address header = address(mapinfo->header());
1039 address header_end = header + mapinfo->header()->header_size();
1040 write_region("header", header, header_end, 0);
1041 write_header(mapinfo);
1042 write_data(header, header_end, 0);
1043
1044 DumpRegion* rw_region = &builder->_rw_region;
1045 DumpRegion* ro_region = &builder->_ro_region;
1046
1047 write_dump_region("rw region", rw_region);
1048 write_objects(rw_region, &builder->_rw_src_objs);
1049
1050 write_dump_region("ro region", ro_region);
1051 write_objects(ro_region, &builder->_ro_src_objs);
1052
1053 address bitmap_end = address(bitmap + bitmap_size_in_bytes);
1054 write_region("bitmap", address(bitmap), bitmap_end, 0);
1055 write_data(header, header_end, 0);
1056
1057 if (closed_heap_regions != NULL) {
1058 write_heap_region("closed heap region", closed_heap_regions);
1059 }
1060 if (open_heap_regions != NULL) {
1061 write_heap_region("open heap region", open_heap_regions);
1062 }
1063
1064 log_info(cds, map)("[End of CDS archive map]");
1065 }
1066 };
1067
1068 void ArchiveBuilder::print_stats() {
1069 _alloc_stats.print_stats(int(_ro_region.used()), int(_rw_region.used()));
1070 }
1071
1072 void ArchiveBuilder::clean_up_src_obj_table() {
1073 SrcObjTableCleaner cleaner;
1074 _src_obj_table.iterate(&cleaner);
1075 }
1076
1077 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo,
1078 GrowableArray<MemRegion>* closed_heap_regions,
1079 GrowableArray<MemRegion>* open_heap_regions,
1080 GrowableArray<ArchiveHeapOopmapInfo>* closed_heap_oopmaps,
1081 GrowableArray<ArchiveHeapOopmapInfo>* open_heap_oopmaps) {
1082 // Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with
1083 // MetaspaceShared::n_regions (internal to hotspot).
1084 assert(NUM_CDS_REGIONS == MetaspaceShared::n_regions, "sanity");
1085
1086 write_region(mapinfo, MetaspaceShared::rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false);
1087 write_region(mapinfo, MetaspaceShared::ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false);
1088
1089 size_t bitmap_size_in_bytes;
1090 char* bitmap = mapinfo->write_bitmap_region(ArchivePtrMarker::ptrmap(), closed_heap_oopmaps, open_heap_oopmaps,
1091 bitmap_size_in_bytes);
1092
1093 if (closed_heap_regions != NULL) {
1094 _total_closed_heap_region_size = mapinfo->write_archive_heap_regions(
1095 closed_heap_regions,
1096 closed_heap_oopmaps,
1097 MetaspaceShared::first_closed_archive_heap_region,
1098 MetaspaceShared::max_closed_archive_heap_region);
1099 _total_open_heap_region_size = mapinfo->write_archive_heap_regions(
1100 open_heap_regions,
1101 open_heap_oopmaps,
1102 MetaspaceShared::first_open_archive_heap_region,
1103 MetaspaceShared::max_open_archive_heap_region);
1104 }
1105
1106 print_region_stats(mapinfo, closed_heap_regions, open_heap_regions);
1107
1108 mapinfo->set_requested_base((char*)MetaspaceShared::requested_base_address());
1109 if (mapinfo->header()->magic() == CDS_DYNAMIC_ARCHIVE_MAGIC) {
1110 mapinfo->set_header_base_archive_name_size(strlen(Arguments::GetSharedArchivePath()) + 1);
1111 mapinfo->set_header_base_archive_is_default(FLAG_IS_DEFAULT(SharedArchiveFile));
1112 }
1113 mapinfo->set_header_crc(mapinfo->compute_header_crc());
1114 // After this point, we should not write any data into mapinfo->header() since this
1115 // would corrupt its checksum we have calculated before.
1116 mapinfo->write_header();
1117 mapinfo->close();
1118
1119 if (log_is_enabled(Info, cds)) {
1120 print_stats();
1121 }
1122
1123 if (log_is_enabled(Info, cds, map)) {
1124 CDSMapLogger::write(this, mapinfo, closed_heap_regions, open_heap_regions,
1125 bitmap, bitmap_size_in_bytes);
1126 }
1127 FREE_C_HEAP_ARRAY(char, bitmap);
1128 }
1129
1130 void ArchiveBuilder::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) {
1131 mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec);
1132 }
1133
1134 void ArchiveBuilder::print_region_stats(FileMapInfo *mapinfo,
1135 GrowableArray<MemRegion>* closed_heap_regions,
1136 GrowableArray<MemRegion>* open_heap_regions) {
1137 // Print statistics of all the regions
1138 const size_t bitmap_used = mapinfo->space_at(MetaspaceShared::bm)->used();
1139 const size_t bitmap_reserved = mapinfo->space_at(MetaspaceShared::bm)->used_aligned();
1140 const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() +
1141 bitmap_reserved +
1142 _total_closed_heap_region_size +
1143 _total_open_heap_region_size;
1144 const size_t total_bytes = _ro_region.used() + _rw_region.used() +
1145 bitmap_used +
1146 _total_closed_heap_region_size +
1147 _total_open_heap_region_size;
1148 const double total_u_perc = percent_of(total_bytes, total_reserved);
1149
1150 _rw_region.print(total_reserved);
1151 _ro_region.print(total_reserved);
1152
1153 print_bitmap_region_stats(bitmap_used, total_reserved);
1154
1155 if (closed_heap_regions != NULL) {
1156 print_heap_region_stats(closed_heap_regions, "ca", total_reserved);
1157 print_heap_region_stats(open_heap_regions, "oa", total_reserved);
1158 }
1159
1160 log_debug(cds)("total : " SIZE_FORMAT_W(9) " [100.0%% of total] out of " SIZE_FORMAT_W(9) " bytes [%5.1f%% used]",
1161 total_bytes, total_reserved, total_u_perc);
1162 }
1163
1164 void ArchiveBuilder::print_bitmap_region_stats(size_t size, size_t total_size) {
1165 log_debug(cds)("bm space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used]",
1166 size, size/double(total_size)*100.0, size);
1167 }
1168
1169 void ArchiveBuilder::print_heap_region_stats(GrowableArray<MemRegion> *heap_mem,
1170 const char *name, size_t total_size) {
1171 int arr_len = heap_mem == NULL ? 0 : heap_mem->length();
1172 for (int i = 0; i < arr_len; i++) {
1173 char* start = (char*)heap_mem->at(i).start();
1174 size_t size = heap_mem->at(i).byte_size();
1175 char* top = start + size;
1176 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,
1177 name, i, size, size/double(total_size)*100.0, size, p2i(start));
1178 }
1179 }
1180
1181 void ArchiveBuilder::report_out_of_space(const char* name, size_t needed_bytes) {
1182 // This is highly unlikely to happen on 64-bits because we have reserved a 4GB space.
1183 // On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes
1184 // or so.
1185 _rw_region.print_out_of_space_msg(name, needed_bytes);
1186 _ro_region.print_out_of_space_msg(name, needed_bytes);
1187
1188 vm_exit_during_initialization(err_msg("Unable to allocate from '%s' region", name),
1189 "Please reduce the number of shared classes.");
1190 }
1191
1192
1193 #ifndef PRODUCT
1194 void ArchiveBuilder::assert_is_vm_thread() {
1195 assert(Thread::current()->is_VM_thread(), "ArchiveBuilder should be used only inside the VMThread");
1196 }
1197 #endif