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