1 /*
2 * Copyright (c) 2020, 2024, 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/aotClassLinker.hpp"
27 #include "cds/aotLinkedClassBulkLoader.hpp"
28 #include "cds/archiveBuilder.hpp"
29 #include "cds/archiveHeapWriter.hpp"
30 #include "cds/archiveUtils.hpp"
31 #include "cds/cdsConfig.hpp"
32 #include "cds/cppVtables.hpp"
33 #include "cds/dumpAllocStats.hpp"
34 #include "cds/dynamicArchive.hpp"
35 #include "cds/heapShared.hpp"
36 #include "cds/metaspaceShared.hpp"
37 #include "cds/regeneratedClasses.hpp"
38 #include "classfile/classLoader.hpp"
39 #include "classfile/classLoaderDataShared.hpp"
40 #include "classfile/classLoaderExt.hpp"
41 #include "classfile/javaClasses.hpp"
42 #include "classfile/symbolTable.hpp"
43 #include "classfile/systemDictionaryShared.hpp"
44 #include "classfile/vmClasses.hpp"
45 #include "interpreter/abstractInterpreter.hpp"
46 #include "jvm.h"
47 #include "logging/log.hpp"
48 #include "logging/logStream.hpp"
49 #include "memory/allStatic.hpp"
50 #include "memory/memoryReserver.hpp"
51 #include "memory/memRegion.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "oops/compressedKlass.inline.hpp"
54 #include "oops/instanceKlass.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oopHandle.inline.hpp"
58 #include "runtime/arguments.hpp"
59 #include "runtime/fieldDescriptor.inline.hpp"
60 #include "runtime/globals_extension.hpp"
61 #include "runtime/javaThread.hpp"
62 #include "runtime/sharedRuntime.hpp"
63 #include "utilities/align.hpp"
64 #include "utilities/bitMap.inline.hpp"
65 #include "utilities/formatBuffer.hpp"
66
67 ArchiveBuilder* ArchiveBuilder::_current = nullptr;
68
69 ArchiveBuilder::OtherROAllocMark::~OtherROAllocMark() {
70 char* newtop = ArchiveBuilder::current()->_ro_region.top();
71 ArchiveBuilder::alloc_stats()->record_other_type(int(newtop - _oldtop), true);
72 }
73
74 ArchiveBuilder::SourceObjList::SourceObjList() : _ptrmap(16 * K, mtClassShared) {
75 _total_bytes = 0;
76 _objs = new (mtClassShared) GrowableArray<SourceObjInfo*>(128 * K, mtClassShared);
77 }
78
79 ArchiveBuilder::SourceObjList::~SourceObjList() {
80 delete _objs;
81 }
82
83 void ArchiveBuilder::SourceObjList::append(SourceObjInfo* src_info) {
84 // Save this source object for copying
85 src_info->set_id(_objs->length());
86 _objs->append(src_info);
87
88 // Prepare for marking the pointers in this source object
89 assert(is_aligned(_total_bytes, sizeof(address)), "must be");
90 src_info->set_ptrmap_start(_total_bytes / sizeof(address));
91 _total_bytes = align_up(_total_bytes + (uintx)src_info->size_in_bytes(), sizeof(address));
92 src_info->set_ptrmap_end(_total_bytes / sizeof(address));
93
94 BitMap::idx_t bitmap_size_needed = BitMap::idx_t(src_info->ptrmap_end());
95 if (_ptrmap.size() <= bitmap_size_needed) {
96 _ptrmap.resize((bitmap_size_needed + 1) * 2);
97 }
98 }
99
100 void ArchiveBuilder::SourceObjList::remember_embedded_pointer(SourceObjInfo* src_info, MetaspaceClosure::Ref* ref) {
101 // src_obj contains a pointer. Remember the location of this pointer in _ptrmap,
102 // so that we can copy/relocate it later.
103 src_info->set_has_embedded_pointer();
104 address src_obj = src_info->source_addr();
105 address* field_addr = ref->addr();
106 assert(src_info->ptrmap_start() < _total_bytes, "sanity");
107 assert(src_info->ptrmap_end() <= _total_bytes, "sanity");
108 assert(*field_addr != nullptr, "should have checked");
109
110 intx field_offset_in_bytes = ((address)field_addr) - src_obj;
111 DEBUG_ONLY(int src_obj_size = src_info->size_in_bytes();)
112 assert(field_offset_in_bytes >= 0, "must be");
113 assert(field_offset_in_bytes + intx(sizeof(intptr_t)) <= intx(src_obj_size), "must be");
114 assert(is_aligned(field_offset_in_bytes, sizeof(address)), "must be");
115
116 BitMap::idx_t idx = BitMap::idx_t(src_info->ptrmap_start() + (uintx)(field_offset_in_bytes / sizeof(address)));
117 _ptrmap.set_bit(BitMap::idx_t(idx));
118 }
119
120 class RelocateEmbeddedPointers : public BitMapClosure {
121 ArchiveBuilder* _builder;
122 address _buffered_obj;
123 BitMap::idx_t _start_idx;
124 public:
125 RelocateEmbeddedPointers(ArchiveBuilder* builder, address buffered_obj, BitMap::idx_t start_idx) :
126 _builder(builder), _buffered_obj(buffered_obj), _start_idx(start_idx) {}
127
128 bool do_bit(BitMap::idx_t bit_offset) {
129 size_t field_offset = size_t(bit_offset - _start_idx) * sizeof(address);
130 address* ptr_loc = (address*)(_buffered_obj + field_offset);
131
132 address old_p = *ptr_loc;
133 address new_p = _builder->get_buffered_addr(old_p);
134
135 log_trace(cds)("Ref: [" PTR_FORMAT "] -> " PTR_FORMAT " => " PTR_FORMAT,
136 p2i(ptr_loc), p2i(old_p), p2i(new_p));
137
138 ArchivePtrMarker::set_and_mark_pointer(ptr_loc, new_p);
139 return true; // keep iterating the bitmap
140 }
141 };
142
143 void ArchiveBuilder::SourceObjList::relocate(int i, ArchiveBuilder* builder) {
144 SourceObjInfo* src_info = objs()->at(i);
145 assert(src_info->should_copy(), "must be");
146 BitMap::idx_t start = BitMap::idx_t(src_info->ptrmap_start()); // inclusive
147 BitMap::idx_t end = BitMap::idx_t(src_info->ptrmap_end()); // exclusive
148
149 RelocateEmbeddedPointers relocator(builder, src_info->buffered_addr(), start);
150 _ptrmap.iterate(&relocator, start, end);
151 }
152
153 ArchiveBuilder::ArchiveBuilder() :
154 _current_dump_region(nullptr),
155 _buffer_bottom(nullptr),
156 _last_verified_top(nullptr),
157 _num_dump_regions_used(0),
158 _other_region_used_bytes(0),
159 _requested_static_archive_bottom(nullptr),
160 _requested_static_archive_top(nullptr),
161 _requested_dynamic_archive_bottom(nullptr),
162 _requested_dynamic_archive_top(nullptr),
163 _mapped_static_archive_bottom(nullptr),
164 _mapped_static_archive_top(nullptr),
165 _buffer_to_requested_delta(0),
166 _rw_region("rw", MAX_SHARED_DELTA),
167 _ro_region("ro", MAX_SHARED_DELTA),
168 _ptrmap(mtClassShared),
169 _rw_ptrmap(mtClassShared),
170 _ro_ptrmap(mtClassShared),
171 _rw_src_objs(),
172 _ro_src_objs(),
173 _src_obj_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE),
174 _buffered_to_src_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE),
175 _total_heap_region_size(0),
176 _estimated_metaspaceobj_bytes(0),
177 _estimated_hashtable_bytes(0)
178 {
179 _klasses = new (mtClassShared) GrowableArray<Klass*>(4 * K, mtClassShared);
180 _symbols = new (mtClassShared) GrowableArray<Symbol*>(256 * K, mtClassShared);
181 _entropy_seed = 0x12345678;
182 assert(_current == nullptr, "must be");
183 _current = this;
184 }
185
186 ArchiveBuilder::~ArchiveBuilder() {
187 assert(_current == this, "must be");
188 _current = nullptr;
189
190 for (int i = 0; i < _symbols->length(); i++) {
191 _symbols->at(i)->decrement_refcount();
192 }
193
194 delete _klasses;
195 delete _symbols;
196 if (_shared_rs.is_reserved()) {
197 MemoryReserver::release(_shared_rs);
198 }
199 }
200
201 // Returns a deterministic sequence of pseudo random numbers. The main purpose is NOT
202 // for randomness but to get good entropy for the identity_hash() of archived Symbols,
203 // while keeping the contents of static CDS archives deterministic to ensure
204 // reproducibility of JDK builds.
205 int ArchiveBuilder::entropy() {
206 assert(SafepointSynchronize::is_at_safepoint(), "needed to ensure deterministic sequence");
207 _entropy_seed = os::next_random(_entropy_seed);
208 return static_cast<int>(_entropy_seed);
209 }
210
211 class GatherKlassesAndSymbols : public UniqueMetaspaceClosure {
212 ArchiveBuilder* _builder;
213
214 public:
215 GatherKlassesAndSymbols(ArchiveBuilder* builder) : _builder(builder) {}
216
217 virtual bool do_unique_ref(Ref* ref, bool read_only) {
218 return _builder->gather_klass_and_symbol(ref, read_only);
219 }
220 };
221
222 bool ArchiveBuilder::gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only) {
223 if (ref->obj() == nullptr) {
224 return false;
225 }
226 if (get_follow_mode(ref) != make_a_copy) {
227 return false;
228 }
229 if (ref->msotype() == MetaspaceObj::ClassType) {
230 Klass* klass = (Klass*)ref->obj();
231 assert(klass->is_klass(), "must be");
232 if (!is_excluded(klass)) {
233 _klasses->append(klass);
234 if (klass->is_hidden()) {
235 assert(klass->is_instance_klass(), "must be");
236 assert(SystemDictionaryShared::should_hidden_class_be_archived(InstanceKlass::cast(klass)), "must be");
237 }
238 }
239 // See RunTimeClassInfo::get_for(): make sure we have enough space for both maximum
240 // Klass alignment as well as the RuntimeInfo* pointer we will embed in front of a Klass.
241 _estimated_metaspaceobj_bytes += align_up(BytesPerWord, CompressedKlassPointers::klass_alignment_in_bytes()) +
242 align_up(sizeof(void*), SharedSpaceObjectAlignment);
243 } else if (ref->msotype() == MetaspaceObj::SymbolType) {
244 // Make sure the symbol won't be GC'ed while we are dumping the archive.
245 Symbol* sym = (Symbol*)ref->obj();
246 sym->increment_refcount();
247 _symbols->append(sym);
248 }
249
250 int bytes = ref->size() * BytesPerWord;
251 _estimated_metaspaceobj_bytes += align_up(bytes, SharedSpaceObjectAlignment);
252
253 return true; // recurse
254 }
255
256 void ArchiveBuilder::gather_klasses_and_symbols() {
257 ResourceMark rm;
258 log_info(cds)("Gathering classes and symbols ... ");
259 GatherKlassesAndSymbols doit(this);
260 iterate_roots(&doit);
261 #if INCLUDE_CDS_JAVA_HEAP
262 if (CDSConfig::is_dumping_full_module_graph()) {
263 ClassLoaderDataShared::iterate_symbols(&doit);
264 }
265 #endif
266 doit.finish();
267
268 if (CDSConfig::is_dumping_static_archive()) {
269 // To ensure deterministic contents in the static archive, we need to ensure that
270 // we iterate the MetaspaceObjs in a deterministic order. It doesn't matter where
271 // the MetaspaceObjs are located originally, as they are copied sequentially into
272 // the archive during the iteration.
273 //
274 // The only issue here is that the symbol table and the system directories may be
275 // randomly ordered, so we copy the symbols and klasses into two arrays and sort
276 // them deterministically.
277 //
278 // During -Xshare:dump, the order of Symbol creation is strictly determined by
279 // the SharedClassListFile (class loading is done in a single thread and the JIT
280 // is disabled). Also, Symbols are allocated in monotonically increasing addresses
281 // (see Symbol::operator new(size_t, int)). So if we iterate the Symbols by
282 // ascending address order, we ensure that all Symbols are copied into deterministic
283 // locations in the archive.
284 //
285 // TODO: in the future, if we want to produce deterministic contents in the
286 // dynamic archive, we might need to sort the symbols alphabetically (also see
287 // DynamicArchiveBuilder::sort_methods()).
288 log_info(cds)("Sorting symbols ... ");
289 _symbols->sort(compare_symbols_by_address);
290 sort_klasses();
291
292 // TODO -- we need a proper estimate for the archived modules, etc,
293 // but this should be enough for now
294 _estimated_metaspaceobj_bytes += 200 * 1024 * 1024;
295 }
296
297 AOTClassLinker::add_candidates();
298 }
299
300 int ArchiveBuilder::compare_symbols_by_address(Symbol** a, Symbol** b) {
301 if (a[0] < b[0]) {
302 return -1;
303 } else {
304 assert(a[0] > b[0], "Duplicated symbol %s unexpected", (*a)->as_C_string());
305 return 1;
306 }
307 }
308
309 int ArchiveBuilder::compare_klass_by_name(Klass** a, Klass** b) {
310 return a[0]->name()->fast_compare(b[0]->name());
311 }
312
313 void ArchiveBuilder::sort_klasses() {
314 log_info(cds)("Sorting classes ... ");
315 _klasses->sort(compare_klass_by_name);
316 }
317
318 size_t ArchiveBuilder::estimate_archive_size() {
319 // size of the symbol table and two dictionaries, plus the RunTimeClassInfo's
320 size_t symbol_table_est = SymbolTable::estimate_size_for_archive();
321 size_t dictionary_est = SystemDictionaryShared::estimate_size_for_archive();
322 _estimated_hashtable_bytes = symbol_table_est + dictionary_est;
323
324 if (CDSConfig::is_dumping_aot_linked_classes()) {
325 // This is difficult to estimate when dumping the dynamic archive, as the
326 // AOTLinkedClassTable may need to contain classes in the static archive as well.
327 //
328 // Just give a generous estimate for now. We will remove estimate_archive_size()
329 // in JDK-8340416
330 _estimated_hashtable_bytes += 20 * 1024 * 1024;
331 }
332
333 size_t total = 0;
334
335 total += _estimated_metaspaceobj_bytes;
336 total += _estimated_hashtable_bytes;
337
338 // allow fragmentation at the end of each dump region
339 total += _total_dump_regions * MetaspaceShared::core_region_alignment();
340
341 log_info(cds)("_estimated_hashtable_bytes = " SIZE_FORMAT " + " SIZE_FORMAT " = " SIZE_FORMAT,
342 symbol_table_est, dictionary_est, _estimated_hashtable_bytes);
343 log_info(cds)("_estimated_metaspaceobj_bytes = " SIZE_FORMAT, _estimated_metaspaceobj_bytes);
344 log_info(cds)("total estimate bytes = " SIZE_FORMAT, total);
345
346 return align_up(total, MetaspaceShared::core_region_alignment());
347 }
348
349 address ArchiveBuilder::reserve_buffer() {
350 size_t buffer_size = estimate_archive_size();
351 ReservedSpace rs = MemoryReserver::reserve(buffer_size,
352 MetaspaceShared::core_region_alignment(),
353 os::vm_page_size());
354 if (!rs.is_reserved()) {
355 log_error(cds)("Failed to reserve " SIZE_FORMAT " bytes of output buffer.", buffer_size);
356 MetaspaceShared::unrecoverable_writing_error();
357 }
358
359 // buffer_bottom is the lowest address of the 2 core regions (rw, ro) when
360 // we are copying the class metadata into the buffer.
361 address buffer_bottom = (address)rs.base();
362 log_info(cds)("Reserved output buffer space at " PTR_FORMAT " [" SIZE_FORMAT " bytes]",
363 p2i(buffer_bottom), buffer_size);
364 _shared_rs = rs;
365
366 _buffer_bottom = buffer_bottom;
367 _last_verified_top = buffer_bottom;
368 _current_dump_region = &_rw_region;
369 _num_dump_regions_used = 1;
370 _other_region_used_bytes = 0;
371 _current_dump_region->init(&_shared_rs, &_shared_vs);
372
373 ArchivePtrMarker::initialize(&_ptrmap, &_shared_vs);
374
375 // The bottom of the static archive should be mapped at this address by default.
376 _requested_static_archive_bottom = (address)MetaspaceShared::requested_base_address();
377
378 // The bottom of the archive (that I am writing now) should be mapped at this address by default.
379 address my_archive_requested_bottom;
380
381 if (CDSConfig::is_dumping_static_archive()) {
382 my_archive_requested_bottom = _requested_static_archive_bottom;
383 } else {
384 _mapped_static_archive_bottom = (address)MetaspaceObj::shared_metaspace_base();
385 _mapped_static_archive_top = (address)MetaspaceObj::shared_metaspace_top();
386 assert(_mapped_static_archive_top >= _mapped_static_archive_bottom, "must be");
387 size_t static_archive_size = _mapped_static_archive_top - _mapped_static_archive_bottom;
388
389 // At run time, we will mmap the dynamic archive at my_archive_requested_bottom
390 _requested_static_archive_top = _requested_static_archive_bottom + static_archive_size;
391 my_archive_requested_bottom = align_up(_requested_static_archive_top, MetaspaceShared::core_region_alignment());
392
393 _requested_dynamic_archive_bottom = my_archive_requested_bottom;
394 }
395
396 _buffer_to_requested_delta = my_archive_requested_bottom - _buffer_bottom;
397
398 address my_archive_requested_top = my_archive_requested_bottom + buffer_size;
399 if (my_archive_requested_bottom < _requested_static_archive_bottom ||
400 my_archive_requested_top <= _requested_static_archive_bottom) {
401 // Size overflow.
402 log_error(cds)("my_archive_requested_bottom = " INTPTR_FORMAT, p2i(my_archive_requested_bottom));
403 log_error(cds)("my_archive_requested_top = " INTPTR_FORMAT, p2i(my_archive_requested_top));
404 log_error(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is too high. "
405 "Please rerun java -Xshare:dump with a lower value", p2i(_requested_static_archive_bottom));
406 MetaspaceShared::unrecoverable_writing_error();
407 }
408
409 if (CDSConfig::is_dumping_static_archive()) {
410 // We don't want any valid object to be at the very bottom of the archive.
411 // See ArchivePtrMarker::mark_pointer().
412 rw_region()->allocate(16);
413 }
414
415 return buffer_bottom;
416 }
417
418 void ArchiveBuilder::iterate_sorted_roots(MetaspaceClosure* it) {
419 int num_symbols = _symbols->length();
420 for (int i = 0; i < num_symbols; i++) {
421 it->push(_symbols->adr_at(i));
422 }
423
424 int num_klasses = _klasses->length();
425 for (int i = 0; i < num_klasses; i++) {
426 it->push(_klasses->adr_at(i));
427 }
428
429 iterate_roots(it);
430 }
431
432 class GatherSortedSourceObjs : public MetaspaceClosure {
433 ArchiveBuilder* _builder;
434
435 public:
436 GatherSortedSourceObjs(ArchiveBuilder* builder) : _builder(builder) {}
437
438 virtual bool do_ref(Ref* ref, bool read_only) {
439 return _builder->gather_one_source_obj(ref, read_only);
440 }
441 };
442
443 bool ArchiveBuilder::gather_one_source_obj(MetaspaceClosure::Ref* ref, bool read_only) {
444 address src_obj = ref->obj();
445 if (src_obj == nullptr) {
446 return false;
447 }
448
449 remember_embedded_pointer_in_enclosing_obj(ref);
450 if (RegeneratedClasses::has_been_regenerated(src_obj)) {
451 // No need to copy it. We will later relocate it to point to the regenerated klass/method.
452 return false;
453 }
454
455 FollowMode follow_mode = get_follow_mode(ref);
456 SourceObjInfo src_info(ref, read_only, follow_mode);
457 bool created;
458 SourceObjInfo* p = _src_obj_table.put_if_absent(src_obj, src_info, &created);
459 if (created) {
460 if (_src_obj_table.maybe_grow()) {
461 log_info(cds, hashtables)("Expanded _src_obj_table table to %d", _src_obj_table.table_size());
462 }
463 }
464
465 #ifdef ASSERT
466 if (ref->msotype() == MetaspaceObj::MethodType) {
467 Method* m = (Method*)ref->obj();
468 assert(!RegeneratedClasses::has_been_regenerated((address)m->method_holder()),
469 "Should not archive methods in a class that has been regenerated");
470 }
471 #endif
472
473 assert(p->read_only() == src_info.read_only(), "must be");
474
475 if (created && src_info.should_copy()) {
476 if (read_only) {
477 _ro_src_objs.append(p);
478 } else {
479 _rw_src_objs.append(p);
480 }
481 return true; // Need to recurse into this ref only if we are copying it
482 } else {
483 return false;
484 }
485 }
486
487 void ArchiveBuilder::record_regenerated_object(address orig_src_obj, address regen_src_obj) {
488 // Record the fact that orig_src_obj has been replaced by regen_src_obj. All calls to get_buffered_addr(orig_src_obj)
489 // should return the same value as get_buffered_addr(regen_src_obj).
490 SourceObjInfo* p = _src_obj_table.get(regen_src_obj);
491 assert(p != nullptr, "regenerated object should always be dumped");
492 SourceObjInfo orig_src_info(orig_src_obj, p);
493 bool created;
494 _src_obj_table.put_if_absent(orig_src_obj, orig_src_info, &created);
495 assert(created, "We shouldn't have archived the original copy of a regenerated object");
496 }
497
498 // Remember that we have a pointer inside ref->enclosing_obj() that points to ref->obj()
499 void ArchiveBuilder::remember_embedded_pointer_in_enclosing_obj(MetaspaceClosure::Ref* ref) {
500 assert(ref->obj() != nullptr, "should have checked");
501
502 address enclosing_obj = ref->enclosing_obj();
503 if (enclosing_obj == nullptr) {
504 return;
505 }
506
507 // We are dealing with 3 addresses:
508 // address o = ref->obj(): We have found an object whose address is o.
509 // address* mpp = ref->mpp(): The object o is pointed to by a pointer whose address is mpp.
510 // I.e., (*mpp == o)
511 // enclosing_obj : If non-null, it is the object which has a field that points to o.
512 // mpp is the address if that field.
513 //
514 // Example: We have an array whose first element points to a Method:
515 // Method* o = 0x0000abcd;
516 // Array<Method*>* enclosing_obj = 0x00001000;
517 // enclosing_obj->at_put(0, o);
518 //
519 // We the MetaspaceClosure iterates on the very first element of this array, we have
520 // ref->obj() == 0x0000abcd (the Method)
521 // ref->mpp() == 0x00001008 (the location of the first element in the array)
522 // ref->enclosing_obj() == 0x00001000 (the Array that contains the Method)
523 //
524 // We use the above information to mark the bitmap to indicate that there's a pointer on address 0x00001008.
525 SourceObjInfo* src_info = _src_obj_table.get(enclosing_obj);
526 if (src_info == nullptr || !src_info->should_copy()) {
527 // source objects of point_to_it/set_to_null types are not copied
528 // so we don't need to remember their pointers.
529 } else {
530 if (src_info->read_only()) {
531 _ro_src_objs.remember_embedded_pointer(src_info, ref);
532 } else {
533 _rw_src_objs.remember_embedded_pointer(src_info, ref);
534 }
535 }
536 }
537
538 void ArchiveBuilder::gather_source_objs() {
539 ResourceMark rm;
540 log_info(cds)("Gathering all archivable objects ... ");
541 gather_klasses_and_symbols();
542 GatherSortedSourceObjs doit(this);
543 iterate_sorted_roots(&doit);
544 doit.finish();
545 }
546
547 bool ArchiveBuilder::is_excluded(Klass* klass) {
548 if (klass->is_instance_klass()) {
549 InstanceKlass* ik = InstanceKlass::cast(klass);
550 return SystemDictionaryShared::is_excluded_class(ik);
551 } else if (klass->is_objArray_klass()) {
552 Klass* bottom = ObjArrayKlass::cast(klass)->bottom_klass();
553 if (MetaspaceShared::is_shared_static(bottom)) {
554 // The bottom class is in the static archive so it's clearly not excluded.
555 assert(CDSConfig::is_dumping_dynamic_archive(), "sanity");
556 return false;
557 } else if (bottom->is_instance_klass()) {
558 return SystemDictionaryShared::is_excluded_class(InstanceKlass::cast(bottom));
559 }
560 }
561
562 return false;
563 }
564
565 ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref *ref) {
566 address obj = ref->obj();
567 if (MetaspaceShared::is_in_shared_metaspace(obj)) {
568 // Don't dump existing shared metadata again.
569 return point_to_it;
570 } else if (ref->msotype() == MetaspaceObj::MethodDataType ||
571 ref->msotype() == MetaspaceObj::MethodCountersType) {
572 return set_to_null;
573 } else {
574 if (ref->msotype() == MetaspaceObj::ClassType) {
575 Klass* klass = (Klass*)ref->obj();
576 assert(klass->is_klass(), "must be");
577 if (is_excluded(klass)) {
578 ResourceMark rm;
579 log_debug(cds, dynamic)("Skipping class (excluded): %s", klass->external_name());
580 return set_to_null;
581 }
582 }
583
584 return make_a_copy;
585 }
586 }
587
588 void ArchiveBuilder::start_dump_region(DumpRegion* next) {
589 address bottom = _last_verified_top;
590 address top = (address)(current_dump_region()->top());
591 _other_region_used_bytes += size_t(top - bottom);
592
593 current_dump_region()->pack(next);
594 _current_dump_region = next;
595 _num_dump_regions_used ++;
596
597 _last_verified_top = (address)(current_dump_region()->top());
598 }
599
600 void ArchiveBuilder::verify_estimate_size(size_t estimate, const char* which) {
601 address bottom = _last_verified_top;
602 address top = (address)(current_dump_region()->top());
603 size_t used = size_t(top - bottom) + _other_region_used_bytes;
604 int diff = int(estimate) - int(used);
605
606 log_info(cds)("%s estimate = " SIZE_FORMAT " used = " SIZE_FORMAT "; diff = %d bytes", which, estimate, used, diff);
607 assert(diff >= 0, "Estimate is too small");
608
609 _last_verified_top = top;
610 _other_region_used_bytes = 0;
611 }
612
613 char* ArchiveBuilder::ro_strdup(const char* s) {
614 char* archived_str = ro_region_alloc((int)strlen(s) + 1);
615 strcpy(archived_str, s);
616 return archived_str;
617 }
618
619 // The objects that have embedded pointers will sink
620 // towards the end of the list. This ensures we have a maximum
621 // number of leading zero bits in the relocation bitmap.
622 int ArchiveBuilder::compare_src_objs(SourceObjInfo** a, SourceObjInfo** b) {
623 if ((*a)->has_embedded_pointer() && !(*b)->has_embedded_pointer()) {
624 return 1;
625 } else if (!(*a)->has_embedded_pointer() && (*b)->has_embedded_pointer()) {
626 return -1;
627 } else {
628 // This is necessary to keep the sorting order stable. Otherwise the
629 // archive's contents may not be deterministic.
630 return (*a)->id() - (*b)->id();
631 }
632 }
633
634 void ArchiveBuilder::sort_metadata_objs() {
635 _rw_src_objs.objs()->sort(compare_src_objs);
636 _ro_src_objs.objs()->sort(compare_src_objs);
637 }
638
639 void ArchiveBuilder::dump_rw_metadata() {
640 ResourceMark rm;
641 log_info(cds)("Allocating RW objects ... ");
642 make_shallow_copies(&_rw_region, &_rw_src_objs);
643
644 #if INCLUDE_CDS_JAVA_HEAP
645 if (CDSConfig::is_dumping_full_module_graph()) {
646 // Archive the ModuleEntry's and PackageEntry's of the 3 built-in loaders
647 char* start = rw_region()->top();
648 ClassLoaderDataShared::allocate_archived_tables();
649 alloc_stats()->record_modules(rw_region()->top() - start, /*read_only*/false);
650 }
651 #endif
652 }
653
654 void ArchiveBuilder::dump_ro_metadata() {
655 ResourceMark rm;
656 log_info(cds)("Allocating RO objects ... ");
657
658 start_dump_region(&_ro_region);
659 make_shallow_copies(&_ro_region, &_ro_src_objs);
660
661 #if INCLUDE_CDS_JAVA_HEAP
662 if (CDSConfig::is_dumping_full_module_graph()) {
663 char* start = ro_region()->top();
664 ClassLoaderDataShared::init_archived_tables();
665 alloc_stats()->record_modules(ro_region()->top() - start, /*read_only*/true);
666 }
667 #endif
668
669 RegeneratedClasses::record_regenerated_objects();
670 }
671
672 void ArchiveBuilder::make_shallow_copies(DumpRegion *dump_region,
673 const ArchiveBuilder::SourceObjList* src_objs) {
674 for (int i = 0; i < src_objs->objs()->length(); i++) {
675 make_shallow_copy(dump_region, src_objs->objs()->at(i));
676 }
677 log_info(cds)("done (%d objects)", src_objs->objs()->length());
678 }
679
680 void ArchiveBuilder::make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info) {
681 address src = src_info->source_addr();
682 int bytes = src_info->size_in_bytes();
683 char* dest;
684 char* oldtop;
685 char* newtop;
686
687 oldtop = dump_region->top();
688 if (src_info->msotype() == MetaspaceObj::ClassType) {
689 // Allocate space for a pointer directly in front of the future InstanceKlass, so
690 // we can do a quick lookup from InstanceKlass* -> RunTimeClassInfo*
691 // without building another hashtable. See RunTimeClassInfo::get_for()
692 // in systemDictionaryShared.cpp.
693 Klass* klass = (Klass*)src;
694 if (klass->is_instance_klass()) {
695 SystemDictionaryShared::validate_before_archiving(InstanceKlass::cast(klass));
696 dump_region->allocate(sizeof(address));
697 }
698 // Allocate space for the future InstanceKlass with proper alignment
699 const size_t alignment =
700 #ifdef _LP64
701 UseCompressedClassPointers ?
702 nth_bit(ArchiveBuilder::precomputed_narrow_klass_shift()) :
703 SharedSpaceObjectAlignment;
704 #else
705 SharedSpaceObjectAlignment;
706 #endif
707 dest = dump_region->allocate(bytes, alignment);
708 } else {
709 dest = dump_region->allocate(bytes);
710 }
711 newtop = dump_region->top();
712
713 memcpy(dest, src, bytes);
714
715 // Update the hash of buffered sorted symbols for static dump so that the symbols have deterministic contents
716 if (CDSConfig::is_dumping_static_archive() && (src_info->msotype() == MetaspaceObj::SymbolType)) {
717 Symbol* buffered_symbol = (Symbol*)dest;
718 assert(((Symbol*)src)->is_permanent(), "archived symbols must be permanent");
719 buffered_symbol->update_identity_hash();
720 }
721
722 {
723 bool created;
724 _buffered_to_src_table.put_if_absent((address)dest, src, &created);
725 assert(created, "must be");
726 if (_buffered_to_src_table.maybe_grow()) {
727 log_info(cds, hashtables)("Expanded _buffered_to_src_table table to %d", _buffered_to_src_table.table_size());
728 }
729 }
730
731 intptr_t* archived_vtable = CppVtables::get_archived_vtable(src_info->msotype(), (address)dest);
732 if (archived_vtable != nullptr) {
733 *(address*)dest = (address)archived_vtable;
734 ArchivePtrMarker::mark_pointer((address*)dest);
735 }
736
737 log_trace(cds)("Copy: " PTR_FORMAT " ==> " PTR_FORMAT " %d", p2i(src), p2i(dest), bytes);
738 src_info->set_buffered_addr((address)dest);
739
740 _alloc_stats.record(src_info->msotype(), int(newtop - oldtop), src_info->read_only());
741
742 DEBUG_ONLY(_alloc_stats.verify((int)dump_region->used(), src_info->read_only()));
743 }
744
745 // This is used by code that hand-assembles data structures, such as the LambdaProxyClassKey, that are
746 // not handled by MetaspaceClosure.
747 void ArchiveBuilder::write_pointer_in_buffer(address* ptr_location, address src_addr) {
748 assert(is_in_buffer_space(ptr_location), "must be");
749 if (src_addr == nullptr) {
750 *ptr_location = nullptr;
751 ArchivePtrMarker::clear_pointer(ptr_location);
752 } else {
753 *ptr_location = get_buffered_addr(src_addr);
754 ArchivePtrMarker::mark_pointer(ptr_location);
755 }
756 }
757
758 void ArchiveBuilder::mark_and_relocate_to_buffered_addr(address* ptr_location) {
759 assert(*ptr_location != nullptr, "sanity");
760 if (!is_in_mapped_static_archive(*ptr_location)) {
761 *ptr_location = get_buffered_addr(*ptr_location);
762 }
763 ArchivePtrMarker::mark_pointer(ptr_location);
764 }
765
766 bool ArchiveBuilder::has_been_buffered(address src_addr) const {
767 if (RegeneratedClasses::has_been_regenerated(src_addr) ||
768 _src_obj_table.get(src_addr) == nullptr ||
769 get_buffered_addr(src_addr) == nullptr) {
770 return false;
771 } else {
772 return true;
773 }
774 }
775
776 address ArchiveBuilder::get_buffered_addr(address src_addr) const {
777 SourceObjInfo* p = _src_obj_table.get(src_addr);
778 assert(p != nullptr, "src_addr " INTPTR_FORMAT " is used but has not been archived",
779 p2i(src_addr));
780
781 return p->buffered_addr();
782 }
783
784 address ArchiveBuilder::get_source_addr(address buffered_addr) const {
785 assert(is_in_buffer_space(buffered_addr), "must be");
786 address* src_p = _buffered_to_src_table.get(buffered_addr);
787 assert(src_p != nullptr && *src_p != nullptr, "must be");
788 return *src_p;
789 }
790
791 void ArchiveBuilder::relocate_embedded_pointers(ArchiveBuilder::SourceObjList* src_objs) {
792 for (int i = 0; i < src_objs->objs()->length(); i++) {
793 src_objs->relocate(i, this);
794 }
795 }
796
797 void ArchiveBuilder::relocate_metaspaceobj_embedded_pointers() {
798 log_info(cds)("Relocating embedded pointers in core regions ... ");
799 relocate_embedded_pointers(&_rw_src_objs);
800 relocate_embedded_pointers(&_ro_src_objs);
801 }
802
803 #define ADD_COUNT(x) \
804 x += 1; \
805 x ## _a += aotlinked ? 1 : 0; \
806 x ## _i += inited ? 1 : 0;
807
808 #define DECLARE_INSTANCE_KLASS_COUNTER(x) \
809 int x = 0; \
810 int x ## _a = 0; \
811 int x ## _i = 0;
812
813 void ArchiveBuilder::make_klasses_shareable() {
814 DECLARE_INSTANCE_KLASS_COUNTER(num_instance_klasses);
815 DECLARE_INSTANCE_KLASS_COUNTER(num_boot_klasses);
816 DECLARE_INSTANCE_KLASS_COUNTER(num_vm_klasses);
817 DECLARE_INSTANCE_KLASS_COUNTER(num_platform_klasses);
818 DECLARE_INSTANCE_KLASS_COUNTER(num_app_klasses);
819 DECLARE_INSTANCE_KLASS_COUNTER(num_old_klasses);
820 DECLARE_INSTANCE_KLASS_COUNTER(num_hidden_klasses);
821 DECLARE_INSTANCE_KLASS_COUNTER(num_enum_klasses);
822 DECLARE_INSTANCE_KLASS_COUNTER(num_unregistered_klasses);
823 int num_unlinked_klasses = 0;
824 int num_obj_array_klasses = 0;
825 int num_type_array_klasses = 0;
826
827 int boot_unlinked = 0;
828 int platform_unlinked = 0;
829 int app_unlinked = 0;
830 int unreg_unlinked = 0;
831
832 for (int i = 0; i < klasses()->length(); i++) {
833 // Some of the code in ConstantPool::remove_unshareable_info() requires the classes
834 // to be in linked state, so it must be call here before the next loop, which returns
835 // all classes to unlinked state.
836 Klass* k = get_buffered_addr(klasses()->at(i));
837 if (k->is_instance_klass()) {
838 InstanceKlass::cast(k)->constants()->remove_unshareable_info();
839 }
840 }
841
842 for (int i = 0; i < klasses()->length(); i++) {
843 const char* type;
844 const char* unlinked = "";
845 const char* kind = "";
846 const char* hidden = "";
847 const char* old = "";
848 const char* generated = "";
849 const char* aotlinked_msg = "";
850 const char* inited_msg = "";
851 Klass* k = get_buffered_addr(klasses()->at(i));
852 k->remove_java_mirror();
853 #ifdef _LP64
854 if (UseCompactObjectHeaders) {
855 Klass* requested_k = to_requested(k);
856 address narrow_klass_base = _requested_static_archive_bottom; // runtime encoding base == runtime mapping start
857 const int narrow_klass_shift = precomputed_narrow_klass_shift();
858 narrowKlass nk = CompressedKlassPointers::encode_not_null_without_asserts(requested_k, narrow_klass_base, narrow_klass_shift);
859 k->set_prototype_header(markWord::prototype().set_narrow_klass(nk));
860 }
861 #endif //_LP64
862 if (k->is_objArray_klass()) {
863 // InstanceKlass and TypeArrayKlass will in turn call remove_unshareable_info
864 // on their array classes.
865 num_obj_array_klasses ++;
866 type = "array";
867 } else if (k->is_typeArray_klass()) {
868 num_type_array_klasses ++;
869 type = "array";
870 k->remove_unshareable_info();
871 } else {
872 assert(k->is_instance_klass(), " must be");
873 InstanceKlass* ik = InstanceKlass::cast(k);
874 InstanceKlass* src_ik = get_source_addr(ik);
875 bool aotlinked = AOTClassLinker::is_candidate(src_ik);
876 bool inited = ik->has_aot_initialized_mirror();
877 ADD_COUNT(num_instance_klasses);
878 if (CDSConfig::is_dumping_dynamic_archive()) {
879 // For static dump, class loader type are already set.
880 ik->assign_class_loader_type();
881 }
882 if (ik->is_hidden()) {
883 ADD_COUNT(num_hidden_klasses);
884 hidden = " hidden";
885 oop loader = k->class_loader();
886 if (loader == nullptr) {
887 type = "boot";
888 ADD_COUNT(num_boot_klasses);
889 } else if (loader == SystemDictionary::java_platform_loader()) {
890 type = "plat";
891 ADD_COUNT(num_platform_klasses);
892 } else if (loader == SystemDictionary::java_system_loader()) {
893 type = "app";
894 ADD_COUNT(num_app_klasses);
895 } else {
896 type = "bad";
897 assert(0, "shouldn't happen");
898 }
899 if (CDSConfig::is_dumping_invokedynamic()) {
900 assert(HeapShared::is_archivable_hidden_klass(ik), "sanity");
901 } else {
902 // Legacy CDS support for lambda proxies
903 CDS_JAVA_HEAP_ONLY(assert(HeapShared::is_lambda_proxy_klass(ik), "sanity");)
904 }
905 } else if (ik->is_shared_boot_class()) {
906 type = "boot";
907 ADD_COUNT(num_boot_klasses);
908 } else if (ik->is_shared_platform_class()) {
909 type = "plat";
910 ADD_COUNT(num_platform_klasses);
911 } else if (ik->is_shared_app_class()) {
912 type = "app";
913 ADD_COUNT(num_app_klasses);
914 } else {
915 assert(ik->is_shared_unregistered_class(), "must be");
916 type = "unreg";
917 ADD_COUNT(num_unregistered_klasses);
918 }
919
920 if (AOTClassLinker::is_vm_class(src_ik)) {
921 ADD_COUNT(num_vm_klasses);
922 }
923
924 if (!ik->is_linked()) {
925 num_unlinked_klasses ++;
926 unlinked = " unlinked";
927 if (ik->is_shared_boot_class()) {
928 boot_unlinked ++;
929 } else if (ik->is_shared_platform_class()) {
930 platform_unlinked ++;
931 } else if (ik->is_shared_app_class()) {
932 app_unlinked ++;
933 } else {
934 unreg_unlinked ++;
935 }
936 }
937
938 if (ik->is_interface()) {
939 kind = " interface";
940 } else if (src_ik->is_enum_subclass()) {
941 kind = " enum";
942 ADD_COUNT(num_enum_klasses);
943 }
944
945 if (!ik->can_be_verified_at_dumptime()) {
946 ADD_COUNT(num_old_klasses);
947 old = " old";
948 }
949
950 if (ik->is_generated_shared_class()) {
951 generated = " generated";
952 }
953 if (aotlinked) {
954 aotlinked_msg = " aot-linked";
955 }
956 if (inited) {
957 inited_msg = " inited";
958 }
959
960 MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread::current(), ik);
961 ik->remove_unshareable_info();
962 }
963
964 if (log_is_enabled(Debug, cds, class)) {
965 ResourceMark rm;
966 log_debug(cds, class)("klasses[%5d] = " PTR_FORMAT " %-5s %s%s%s%s%s%s%s%s", i,
967 p2i(to_requested(k)), type, k->external_name(),
968 kind, hidden, old, unlinked, generated, aotlinked_msg, inited_msg);
969 }
970 }
971
972 #define STATS_FORMAT "= %5d, aot-linked = %5d, inited = %5d"
973 #define STATS_PARAMS(x) num_ ## x, num_ ## x ## _a, num_ ## x ## _i
974
975 log_info(cds)("Number of classes %d", num_instance_klasses + num_obj_array_klasses + num_type_array_klasses);
976 log_info(cds)(" instance classes " STATS_FORMAT, STATS_PARAMS(instance_klasses));
977 log_info(cds)(" boot " STATS_FORMAT, STATS_PARAMS(boot_klasses));
978 log_info(cds)(" vm " STATS_FORMAT, STATS_PARAMS(vm_klasses));
979 log_info(cds)(" platform " STATS_FORMAT, STATS_PARAMS(platform_klasses));
980 log_info(cds)(" app " STATS_FORMAT, STATS_PARAMS(app_klasses));
981 log_info(cds)(" unregistered " STATS_FORMAT, STATS_PARAMS(unregistered_klasses));
982 log_info(cds)(" (enum) " STATS_FORMAT, STATS_PARAMS(enum_klasses));
983 log_info(cds)(" (hidden) " STATS_FORMAT, STATS_PARAMS(hidden_klasses));
984 log_info(cds)(" (old) " STATS_FORMAT, STATS_PARAMS(old_klasses));
985 log_info(cds)(" (unlinked) = %5d, boot = %d, plat = %d, app = %d, unreg = %d",
986 num_unlinked_klasses, boot_unlinked, platform_unlinked, app_unlinked, unreg_unlinked);
987 log_info(cds)(" obj array classes = %5d", num_obj_array_klasses);
988 log_info(cds)(" type array classes = %5d", num_type_array_klasses);
989 log_info(cds)(" symbols = %5d", _symbols->length());
990
991 #undef STATS_FORMAT
992 #undef STATS_PARAMS
993
994 DynamicArchive::make_array_klasses_shareable();
995 }
996
997 void ArchiveBuilder::serialize_dynamic_archivable_items(SerializeClosure* soc) {
998 SymbolTable::serialize_shared_table_header(soc, false);
999 SystemDictionaryShared::serialize_dictionary_headers(soc, false);
1000 DynamicArchive::serialize_array_klasses(soc);
1001 AOTLinkedClassBulkLoader::serialize(soc, false);
1002 }
1003
1004 uintx ArchiveBuilder::buffer_to_offset(address p) const {
1005 address requested_p = to_requested(p);
1006 assert(requested_p >= _requested_static_archive_bottom, "must be");
1007 return requested_p - _requested_static_archive_bottom;
1008 }
1009
1010 uintx ArchiveBuilder::any_to_offset(address p) const {
1011 if (is_in_mapped_static_archive(p)) {
1012 assert(CDSConfig::is_dumping_dynamic_archive(), "must be");
1013 return p - _mapped_static_archive_bottom;
1014 }
1015 if (!is_in_buffer_space(p)) {
1016 // p must be a "source" address
1017 p = get_buffered_addr(p);
1018 }
1019 return buffer_to_offset(p);
1020 }
1021
1022 address ArchiveBuilder::offset_to_buffered_address(u4 offset) const {
1023 address requested_addr = _requested_static_archive_bottom + offset;
1024 address buffered_addr = requested_addr - _buffer_to_requested_delta;
1025 assert(is_in_buffer_space(buffered_addr), "bad offset");
1026 return buffered_addr;
1027 }
1028
1029 #if INCLUDE_CDS_JAVA_HEAP
1030 narrowKlass ArchiveBuilder::get_requested_narrow_klass(Klass* k) {
1031 assert(CDSConfig::is_dumping_heap(), "sanity");
1032 k = get_buffered_klass(k);
1033 Klass* requested_k = to_requested(k);
1034 const int narrow_klass_shift = ArchiveBuilder::precomputed_narrow_klass_shift();
1035 #ifdef ASSERT
1036 const size_t klass_alignment = MAX2(SharedSpaceObjectAlignment, (size_t)nth_bit(narrow_klass_shift));
1037 assert(is_aligned(k, klass_alignment), "Klass " PTR_FORMAT " misaligned.", p2i(k));
1038 #endif
1039 address narrow_klass_base = _requested_static_archive_bottom; // runtime encoding base == runtime mapping start
1040 // Note: use the "raw" version of encode that takes explicit narrow klass base and shift. Don't use any
1041 // of the variants that do sanity checks, nor any of those that use the current - dump - JVM's encoding setting.
1042 return CompressedKlassPointers::encode_not_null_without_asserts(requested_k, narrow_klass_base, narrow_klass_shift);
1043 }
1044 #endif // INCLUDE_CDS_JAVA_HEAP
1045
1046 // RelocateBufferToRequested --- Relocate all the pointers in rw/ro,
1047 // so that the archive can be mapped to the "requested" location without runtime relocation.
1048 //
1049 // - See ArchiveBuilder header for the definition of "buffer", "mapped" and "requested"
1050 // - ArchivePtrMarker::ptrmap() marks all the pointers in the rw/ro regions
1051 // - Every pointer must have one of the following values:
1052 // [a] nullptr:
1053 // No relocation is needed. Remove this pointer from ptrmap so we don't need to
1054 // consider it at runtime.
1055 // [b] Points into an object X which is inside the buffer:
1056 // Adjust this pointer by _buffer_to_requested_delta, so it points to X
1057 // when the archive is mapped at the requested location.
1058 // [c] Points into an object Y which is inside mapped static archive:
1059 // - This happens only during dynamic dump
1060 // - Adjust this pointer by _mapped_to_requested_static_archive_delta,
1061 // so it points to Y when the static archive is mapped at the requested location.
1062 template <bool STATIC_DUMP>
1063 class RelocateBufferToRequested : public BitMapClosure {
1064 ArchiveBuilder* _builder;
1065 address _buffer_bottom;
1066 intx _buffer_to_requested_delta;
1067 intx _mapped_to_requested_static_archive_delta;
1068 size_t _max_non_null_offset;
1069
1070 public:
1071 RelocateBufferToRequested(ArchiveBuilder* builder) {
1072 _builder = builder;
1073 _buffer_bottom = _builder->buffer_bottom();
1074 _buffer_to_requested_delta = builder->buffer_to_requested_delta();
1075 _mapped_to_requested_static_archive_delta = builder->requested_static_archive_bottom() - builder->mapped_static_archive_bottom();
1076 _max_non_null_offset = 0;
1077
1078 address bottom = _builder->buffer_bottom();
1079 address top = _builder->buffer_top();
1080 address new_bottom = bottom + _buffer_to_requested_delta;
1081 address new_top = top + _buffer_to_requested_delta;
1082 log_debug(cds)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT "] to "
1083 "[" INTPTR_FORMAT " - " INTPTR_FORMAT "]",
1084 p2i(bottom), p2i(top),
1085 p2i(new_bottom), p2i(new_top));
1086 }
1087
1088 bool do_bit(size_t offset) {
1089 address* p = (address*)_buffer_bottom + offset;
1090 assert(_builder->is_in_buffer_space(p), "pointer must live in buffer space");
1091
1092 if (*p == nullptr) {
1093 // todo -- clear bit, etc
1094 ArchivePtrMarker::ptrmap()->clear_bit(offset);
1095 } else {
1096 if (STATIC_DUMP) {
1097 assert(_builder->is_in_buffer_space(*p), "old pointer must point inside buffer space");
1098 *p += _buffer_to_requested_delta;
1099 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive");
1100 } else {
1101 if (_builder->is_in_buffer_space(*p)) {
1102 *p += _buffer_to_requested_delta;
1103 // assert is in requested dynamic archive
1104 } else {
1105 assert(_builder->is_in_mapped_static_archive(*p), "old pointer must point inside buffer space or mapped static archive");
1106 *p += _mapped_to_requested_static_archive_delta;
1107 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive");
1108 }
1109 }
1110 _max_non_null_offset = offset;
1111 }
1112
1113 return true; // keep iterating
1114 }
1115
1116 void doit() {
1117 ArchivePtrMarker::ptrmap()->iterate(this);
1118 ArchivePtrMarker::compact(_max_non_null_offset);
1119 }
1120 };
1121
1122 #ifdef _LP64
1123 int ArchiveBuilder::precomputed_narrow_klass_shift() {
1124 // Legacy Mode:
1125 // We use 32 bits for narrowKlass, which should cover the full 4G Klass range. Shift can be 0.
1126 // CompactObjectHeader Mode:
1127 // narrowKlass is much smaller, and we use the highest possible shift value to later get the maximum
1128 // Klass encoding range.
1129 //
1130 // Note that all of this may change in the future, if we decide to correct the pre-calculated
1131 // narrow Klass IDs at archive load time.
1132 assert(UseCompressedClassPointers, "Only needed for compressed class pointers");
1133 return UseCompactObjectHeaders ? CompressedKlassPointers::max_shift() : 0;
1134 }
1135 #endif // _LP64
1136
1137 void ArchiveBuilder::relocate_to_requested() {
1138 ro_region()->pack();
1139
1140 size_t my_archive_size = buffer_top() - buffer_bottom();
1141
1142 if (CDSConfig::is_dumping_static_archive()) {
1143 _requested_static_archive_top = _requested_static_archive_bottom + my_archive_size;
1144 RelocateBufferToRequested<true> patcher(this);
1145 patcher.doit();
1146 } else {
1147 assert(CDSConfig::is_dumping_dynamic_archive(), "must be");
1148 _requested_dynamic_archive_top = _requested_dynamic_archive_bottom + my_archive_size;
1149 RelocateBufferToRequested<false> patcher(this);
1150 patcher.doit();
1151 }
1152 }
1153
1154 // Write detailed info to a mapfile to analyze contents of the archive.
1155 // static dump:
1156 // java -Xshare:dump -Xlog:cds+map=trace:file=cds.map:none:filesize=0
1157 // dynamic dump:
1158 // java -cp MyApp.jar -XX:ArchiveClassesAtExit=MyApp.jsa \
1159 // -Xlog:cds+map=trace:file=cds.map:none:filesize=0 MyApp
1160 //
1161 // We need to do some address translation because the buffers used at dump time may be mapped to
1162 // a different location at runtime. At dump time, the buffers may be at arbitrary locations
1163 // picked by the OS. At runtime, we try to map at a fixed location (SharedBaseAddress). For
1164 // consistency, we log everything using runtime addresses.
1165 class ArchiveBuilder::CDSMapLogger : AllStatic {
1166 static intx buffer_to_runtime_delta() {
1167 // Translate the buffers used by the RW/RO regions to their eventual (requested) locations
1168 // at runtime.
1169 return ArchiveBuilder::current()->buffer_to_requested_delta();
1170 }
1171
1172 // rw/ro regions only
1173 static void log_metaspace_region(const char* name, DumpRegion* region,
1174 const ArchiveBuilder::SourceObjList* src_objs) {
1175 address region_base = address(region->base());
1176 address region_top = address(region->top());
1177 log_region(name, region_base, region_top, region_base + buffer_to_runtime_delta());
1178 log_metaspace_objects(region, src_objs);
1179 }
1180
1181 #define _LOG_PREFIX PTR_FORMAT ": @@ %-17s %d"
1182
1183 static void log_klass(Klass* k, address runtime_dest, const char* type_name, int bytes, Thread* current) {
1184 ResourceMark rm(current);
1185 log_debug(cds, map)(_LOG_PREFIX " %s",
1186 p2i(runtime_dest), type_name, bytes, k->external_name());
1187 }
1188 static void log_method(Method* m, address runtime_dest, const char* type_name, int bytes, Thread* current) {
1189 ResourceMark rm(current);
1190 log_debug(cds, map)(_LOG_PREFIX " %s",
1191 p2i(runtime_dest), type_name, bytes, m->external_name());
1192 }
1193
1194 // rw/ro regions only
1195 static void log_metaspace_objects(DumpRegion* region, const ArchiveBuilder::SourceObjList* src_objs) {
1196 address last_obj_base = address(region->base());
1197 address last_obj_end = address(region->base());
1198 address region_end = address(region->end());
1199 Thread* current = Thread::current();
1200 for (int i = 0; i < src_objs->objs()->length(); i++) {
1201 SourceObjInfo* src_info = src_objs->at(i);
1202 address src = src_info->source_addr();
1203 address dest = src_info->buffered_addr();
1204 log_as_hex(last_obj_base, dest, last_obj_base + buffer_to_runtime_delta());
1205 address runtime_dest = dest + buffer_to_runtime_delta();
1206 int bytes = src_info->size_in_bytes();
1207
1208 MetaspaceObj::Type type = src_info->msotype();
1209 const char* type_name = MetaspaceObj::type_name(type);
1210
1211 switch (type) {
1212 case MetaspaceObj::ClassType:
1213 log_klass((Klass*)src, runtime_dest, type_name, bytes, current);
1214 break;
1215 case MetaspaceObj::ConstantPoolType:
1216 log_klass(((ConstantPool*)src)->pool_holder(),
1217 runtime_dest, type_name, bytes, current);
1218 break;
1219 case MetaspaceObj::ConstantPoolCacheType:
1220 log_klass(((ConstantPoolCache*)src)->constant_pool()->pool_holder(),
1221 runtime_dest, type_name, bytes, current);
1222 break;
1223 case MetaspaceObj::MethodType:
1224 log_method((Method*)src, runtime_dest, type_name, bytes, current);
1225 break;
1226 case MetaspaceObj::ConstMethodType:
1227 log_method(((ConstMethod*)src)->method(), runtime_dest, type_name, bytes, current);
1228 break;
1229 case MetaspaceObj::SymbolType:
1230 {
1231 ResourceMark rm(current);
1232 Symbol* s = (Symbol*)src;
1233 log_debug(cds, map)(_LOG_PREFIX " %s", p2i(runtime_dest), type_name, bytes,
1234 s->as_quoted_ascii());
1235 }
1236 break;
1237 default:
1238 log_debug(cds, map)(_LOG_PREFIX, p2i(runtime_dest), type_name, bytes);
1239 break;
1240 }
1241
1242 last_obj_base = dest;
1243 last_obj_end = dest + bytes;
1244 }
1245
1246 log_as_hex(last_obj_base, last_obj_end, last_obj_base + buffer_to_runtime_delta());
1247 if (last_obj_end < region_end) {
1248 log_debug(cds, map)(PTR_FORMAT ": @@ Misc data " SIZE_FORMAT " bytes",
1249 p2i(last_obj_end + buffer_to_runtime_delta()),
1250 size_t(region_end - last_obj_end));
1251 log_as_hex(last_obj_end, region_end, last_obj_end + buffer_to_runtime_delta());
1252 }
1253 }
1254
1255 #undef _LOG_PREFIX
1256
1257 // Log information about a region, whose address at dump time is [base .. top). At
1258 // runtime, this region will be mapped to requested_base. requested_base is 0 if this
1259 // region will be mapped at os-selected addresses (such as the bitmap region), or will
1260 // be accessed with os::read (the header).
1261 //
1262 // Note: across -Xshare:dump runs, base may be different, but requested_base should
1263 // be the same as the archive contents should be deterministic.
1264 static void log_region(const char* name, address base, address top, address requested_base) {
1265 size_t size = top - base;
1266 base = requested_base;
1267 top = requested_base + size;
1268 log_info(cds, map)("[%-18s " PTR_FORMAT " - " PTR_FORMAT " " SIZE_FORMAT_W(9) " bytes]",
1269 name, p2i(base), p2i(top), size);
1270 }
1271
1272 #if INCLUDE_CDS_JAVA_HEAP
1273 static void log_heap_region(ArchiveHeapInfo* heap_info) {
1274 MemRegion r = heap_info->buffer_region();
1275 address start = address(r.start()); // start of the current oop inside the buffer
1276 address end = address(r.end());
1277 log_region("heap", start, end, ArchiveHeapWriter::buffered_addr_to_requested_addr(start));
1278
1279 LogStreamHandle(Info, cds, map) st;
1280
1281 HeapRootSegments segments = heap_info->heap_root_segments();
1282 assert(segments.base_offset() == 0, "Sanity");
1283
1284 for (size_t seg_idx = 0; seg_idx < segments.count(); seg_idx++) {
1285 address requested_start = ArchiveHeapWriter::buffered_addr_to_requested_addr(start);
1286 st.print_cr(PTR_FORMAT ": Heap roots segment [%d]",
1287 p2i(requested_start), segments.size_in_elems(seg_idx));
1288 start += segments.size_in_bytes(seg_idx);
1289 }
1290 log_heap_roots();
1291
1292 while (start < end) {
1293 size_t byte_size;
1294 oop source_oop = ArchiveHeapWriter::buffered_addr_to_source_obj(start);
1295 address requested_start = ArchiveHeapWriter::buffered_addr_to_requested_addr(start);
1296 st.print(PTR_FORMAT ": @@ Object ", p2i(requested_start));
1297
1298 if (source_oop != nullptr) {
1299 // This is a regular oop that got archived.
1300 // Don't print the requested addr again as we have just printed it at the beginning of the line.
1301 // Example:
1302 // 0x00000007ffd27938: @@ Object (0xfffa4f27) java.util.HashMap
1303 print_oop_info_cr(&st, source_oop, /*print_requested_addr=*/false);
1304 byte_size = source_oop->size() * BytesPerWord;
1305 } else if ((byte_size = ArchiveHeapWriter::get_filler_size_at(start)) > 0) {
1306 // We have a filler oop, which also does not exist in BufferOffsetToSourceObjectTable.
1307 // Example:
1308 // 0x00000007ffc3ffd8: @@ Object filler 40 bytes
1309 st.print_cr("filler " SIZE_FORMAT " bytes", byte_size);
1310 } else {
1311 ShouldNotReachHere();
1312 }
1313
1314 address oop_end = start + byte_size;
1315 log_as_hex(start, oop_end, requested_start, /*is_heap=*/true);
1316
1317 if (source_oop != nullptr) {
1318 log_oop_details(heap_info, source_oop, /*buffered_addr=*/start);
1319 }
1320 start = oop_end;
1321 }
1322 }
1323
1324 // ArchivedFieldPrinter is used to print the fields of archived objects. We can't
1325 // use _source_obj->print_on(), because we want to print the oop fields
1326 // in _source_obj with their requested addresses using print_oop_info_cr().
1327 class ArchivedFieldPrinter : public FieldClosure {
1328 ArchiveHeapInfo* _heap_info;
1329 outputStream* _st;
1330 oop _source_obj;
1331 address _buffered_addr;
1332 public:
1333 ArchivedFieldPrinter(ArchiveHeapInfo* heap_info, outputStream* st, oop src_obj, address buffered_addr) :
1334 _heap_info(heap_info), _st(st), _source_obj(src_obj), _buffered_addr(buffered_addr) {}
1335
1336 void do_field(fieldDescriptor* fd) {
1337 _st->print(" - ");
1338 BasicType ft = fd->field_type();
1339 switch (ft) {
1340 case T_ARRAY:
1341 case T_OBJECT:
1342 {
1343 fd->print_on(_st); // print just the name and offset
1344 oop obj = _source_obj->obj_field(fd->offset());
1345 if (java_lang_Class::is_instance(obj)) {
1346 obj = HeapShared::scratch_java_mirror(obj);
1347 }
1348 print_oop_info_cr(_st, obj);
1349 }
1350 break;
1351 default:
1352 if (ArchiveHeapWriter::is_marked_as_native_pointer(_heap_info, _source_obj, fd->offset())) {
1353 print_as_native_pointer(fd);
1354 } else {
1355 fd->print_on_for(_st, cast_to_oop(_buffered_addr)); // name, offset, value
1356 _st->cr();
1357 }
1358 }
1359 }
1360
1361 void print_as_native_pointer(fieldDescriptor* fd) {
1362 LP64_ONLY(assert(fd->field_type() == T_LONG, "must be"));
1363 NOT_LP64 (assert(fd->field_type() == T_INT, "must be"));
1364
1365 // We have a field that looks like an integer, but it's actually a pointer to a MetaspaceObj.
1366 address source_native_ptr = (address)
1367 LP64_ONLY(_source_obj->long_field(fd->offset()))
1368 NOT_LP64( _source_obj->int_field (fd->offset()));
1369 ArchiveBuilder* builder = ArchiveBuilder::current();
1370
1371 // The value of the native pointer at runtime.
1372 address requested_native_ptr = builder->to_requested(builder->get_buffered_addr(source_native_ptr));
1373
1374 // The address of _source_obj at runtime
1375 oop requested_obj = ArchiveHeapWriter::source_obj_to_requested_obj(_source_obj);
1376 // The address of this field in the requested space
1377 assert(requested_obj != nullptr, "Attempting to load field from null oop");
1378 address requested_field_addr = cast_from_oop<address>(requested_obj) + fd->offset();
1379
1380 fd->print_on(_st);
1381 _st->print_cr(PTR_FORMAT " (marked metadata pointer @" PTR_FORMAT " )",
1382 p2i(requested_native_ptr), p2i(requested_field_addr));
1383 }
1384 };
1385
1386 // Print the fields of instanceOops, or the elements of arrayOops
1387 static void log_oop_details(ArchiveHeapInfo* heap_info, oop source_oop, address buffered_addr) {
1388 LogStreamHandle(Trace, cds, map, oops) st;
1389 if (st.is_enabled()) {
1390 Klass* source_klass = source_oop->klass();
1391 ArchiveBuilder* builder = ArchiveBuilder::current();
1392 Klass* requested_klass = builder->to_requested(builder->get_buffered_addr(source_klass));
1393
1394 st.print(" - klass: ");
1395 source_klass->print_value_on(&st);
1396 st.print(" " PTR_FORMAT, p2i(requested_klass));
1397 st.cr();
1398
1399 if (source_oop->is_typeArray()) {
1400 TypeArrayKlass::cast(source_klass)->oop_print_elements_on(typeArrayOop(source_oop), &st);
1401 } else if (source_oop->is_objArray()) {
1402 objArrayOop source_obj_array = objArrayOop(source_oop);
1403 for (int i = 0; i < source_obj_array->length(); i++) {
1404 st.print(" -%4d: ", i);
1405 oop obj = source_obj_array->obj_at(i);
1406 if (java_lang_Class::is_instance(obj)) {
1407 obj = HeapShared::scratch_java_mirror(obj);
1408 }
1409 print_oop_info_cr(&st, obj);
1410 }
1411 } else {
1412 st.print_cr(" - fields (" SIZE_FORMAT " words):", source_oop->size());
1413 ArchivedFieldPrinter print_field(heap_info, &st, source_oop, buffered_addr);
1414 InstanceKlass::cast(source_klass)->print_nonstatic_fields(&print_field);
1415
1416 if (java_lang_Class::is_instance(source_oop)) {
1417 oop scratch_mirror = source_oop;
1418 st.print(" - signature: ");
1419 print_class_signature_for_mirror(&st, scratch_mirror);
1420 st.cr();
1421
1422 Klass* src_klass = java_lang_Class::as_Klass(scratch_mirror);
1423 if (src_klass != nullptr && src_klass->is_instance_klass()) {
1424 oop rr = HeapShared::scratch_resolved_references(InstanceKlass::cast(src_klass)->constants());
1425 st.print(" - archived_resolved_references: ");
1426 print_oop_info_cr(&st, rr);
1427
1428 // We need to print the fields in the scratch_mirror, not the original mirror.
1429 // (if a class is not aot-initialized, static fields in its scratch mirror will be cleared).
1430 assert(scratch_mirror == HeapShared::scratch_java_mirror(src_klass->java_mirror()), "sanity");
1431 st.print_cr("- ---- static fields (%d):", java_lang_Class::static_oop_field_count(scratch_mirror));
1432 InstanceKlass::cast(src_klass)->do_local_static_fields(&print_field);
1433 }
1434 }
1435 }
1436 }
1437 }
1438
1439 static void print_class_signature_for_mirror(outputStream* st, oop scratch_mirror) {
1440 assert(java_lang_Class::is_instance(scratch_mirror), "sanity");
1441 if (java_lang_Class::is_primitive(scratch_mirror)) {
1442 for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
1443 BasicType bt = (BasicType)i;
1444 if (!is_reference_type(bt) && scratch_mirror == HeapShared::scratch_java_mirror(bt)) {
1445 oop orig_mirror = Universe::java_mirror(bt);
1446 java_lang_Class::print_signature(orig_mirror, st);
1447 return;
1448 }
1449 }
1450 ShouldNotReachHere();
1451 }
1452 java_lang_Class::print_signature(scratch_mirror, st);
1453 }
1454
1455 static void log_heap_roots() {
1456 LogStreamHandle(Trace, cds, map, oops) st;
1457 if (st.is_enabled()) {
1458 for (int i = 0; i < HeapShared::pending_roots()->length(); i++) {
1459 st.print("roots[%4d]: ", i);
1460 print_oop_info_cr(&st, HeapShared::pending_roots()->at(i));
1461 }
1462 }
1463 }
1464
1465 // Example output:
1466 // - The first number is the requested address (if print_requested_addr == true)
1467 // - The second number is the narrowOop version of the requested address (if UseCompressedOops == true)
1468 // 0x00000007ffc7e840 (0xfff8fd08) java.lang.Class Ljava/util/Array;
1469 // 0x00000007ffc000f8 (0xfff8001f) [B length: 11
1470 static void print_oop_info_cr(outputStream* st, oop source_oop, bool print_requested_addr = true) {
1471 if (source_oop == nullptr) {
1472 st->print_cr("null");
1473 } else {
1474 ResourceMark rm;
1475 oop requested_obj = ArchiveHeapWriter::source_obj_to_requested_obj(source_oop);
1476 if (print_requested_addr) {
1477 st->print(PTR_FORMAT " ", p2i(requested_obj));
1478 }
1479 if (UseCompressedOops) {
1480 st->print("(0x%08x) ", CompressedOops::narrow_oop_value(requested_obj));
1481 }
1482 if (source_oop->is_array()) {
1483 int array_len = arrayOop(source_oop)->length();
1484 st->print_cr("%s length: %d", source_oop->klass()->external_name(), array_len);
1485 } else {
1486 st->print("%s", source_oop->klass()->external_name());
1487
1488 if (java_lang_String::is_instance(source_oop)) {
1489 st->print(" ");
1490 java_lang_String::print(source_oop, st);
1491 } else if (java_lang_Class::is_instance(source_oop)) {
1492 oop scratch_mirror = source_oop;
1493
1494 st->print(" ");
1495 print_class_signature_for_mirror(st, scratch_mirror);
1496
1497 Klass* src_klass = java_lang_Class::as_Klass(scratch_mirror);
1498 if (src_klass != nullptr && src_klass->is_instance_klass()) {
1499 InstanceKlass* buffered_klass =
1500 ArchiveBuilder::current()->get_buffered_addr(InstanceKlass::cast(src_klass));
1501 if (buffered_klass->has_aot_initialized_mirror()) {
1502 st->print(" (aot-inited)");
1503 }
1504 }
1505 }
1506 st->cr();
1507 }
1508 }
1509 }
1510 #endif // INCLUDE_CDS_JAVA_HEAP
1511
1512 // Log all the data [base...top). Pretend that the base address
1513 // will be mapped to requested_base at run-time.
1514 static void log_as_hex(address base, address top, address requested_base, bool is_heap = false) {
1515 assert(top >= base, "must be");
1516
1517 LogStreamHandle(Trace, cds, map) lsh;
1518 if (lsh.is_enabled()) {
1519 int unitsize = sizeof(address);
1520 if (is_heap && UseCompressedOops) {
1521 // This makes the compressed oop pointers easier to read, but
1522 // longs and doubles will be split into two words.
1523 unitsize = sizeof(narrowOop);
1524 }
1525 os::print_hex_dump(&lsh, base, top, unitsize, /* print_ascii=*/true, /* bytes_per_line=*/32, requested_base);
1526 }
1527 }
1528
1529 static void log_header(FileMapInfo* mapinfo) {
1530 LogStreamHandle(Info, cds, map) lsh;
1531 if (lsh.is_enabled()) {
1532 mapinfo->print(&lsh);
1533 }
1534 }
1535
1536 public:
1537 static void log(ArchiveBuilder* builder, FileMapInfo* mapinfo,
1538 ArchiveHeapInfo* heap_info,
1539 char* bitmap, size_t bitmap_size_in_bytes) {
1540 log_info(cds, map)("%s CDS archive map for %s", CDSConfig::is_dumping_static_archive() ? "Static" : "Dynamic", mapinfo->full_path());
1541
1542 address header = address(mapinfo->header());
1543 address header_end = header + mapinfo->header()->header_size();
1544 log_region("header", header, header_end, nullptr);
1545 log_header(mapinfo);
1546 log_as_hex(header, header_end, nullptr);
1547
1548 DumpRegion* rw_region = &builder->_rw_region;
1549 DumpRegion* ro_region = &builder->_ro_region;
1550
1551 log_metaspace_region("rw region", rw_region, &builder->_rw_src_objs);
1552 log_metaspace_region("ro region", ro_region, &builder->_ro_src_objs);
1553
1554 address bitmap_end = address(bitmap + bitmap_size_in_bytes);
1555 log_region("bitmap", address(bitmap), bitmap_end, nullptr);
1556 log_as_hex((address)bitmap, bitmap_end, nullptr);
1557
1558 #if INCLUDE_CDS_JAVA_HEAP
1559 if (heap_info->is_used()) {
1560 log_heap_region(heap_info);
1561 }
1562 #endif
1563
1564 log_info(cds, map)("[End of CDS archive map]");
1565 }
1566 }; // end ArchiveBuilder::CDSMapLogger
1567
1568 void ArchiveBuilder::print_stats() {
1569 _alloc_stats.print_stats(int(_ro_region.used()), int(_rw_region.used()));
1570 }
1571
1572 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo, ArchiveHeapInfo* heap_info) {
1573 // Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with
1574 // MetaspaceShared::n_regions (internal to hotspot).
1575 assert(NUM_CDS_REGIONS == MetaspaceShared::n_regions, "sanity");
1576
1577 write_region(mapinfo, MetaspaceShared::rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false);
1578 write_region(mapinfo, MetaspaceShared::ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false);
1579
1580 // Split pointer map into read-write and read-only bitmaps
1581 ArchivePtrMarker::initialize_rw_ro_maps(&_rw_ptrmap, &_ro_ptrmap);
1582
1583 size_t bitmap_size_in_bytes;
1584 char* bitmap = mapinfo->write_bitmap_region(ArchivePtrMarker::rw_ptrmap(), ArchivePtrMarker::ro_ptrmap(), heap_info,
1585 bitmap_size_in_bytes);
1586
1587 if (heap_info->is_used()) {
1588 _total_heap_region_size = mapinfo->write_heap_region(heap_info);
1589 }
1590
1591 print_region_stats(mapinfo, heap_info);
1592
1593 mapinfo->set_requested_base((char*)MetaspaceShared::requested_base_address());
1594 mapinfo->set_header_crc(mapinfo->compute_header_crc());
1595 // After this point, we should not write any data into mapinfo->header() since this
1596 // would corrupt its checksum we have calculated before.
1597 mapinfo->write_header();
1598 mapinfo->close();
1599
1600 if (log_is_enabled(Info, cds)) {
1601 print_stats();
1602 }
1603
1604 if (log_is_enabled(Info, cds, map)) {
1605 CDSMapLogger::log(this, mapinfo, heap_info,
1606 bitmap, bitmap_size_in_bytes);
1607 }
1608 CDS_JAVA_HEAP_ONLY(HeapShared::destroy_archived_object_cache());
1609 FREE_C_HEAP_ARRAY(char, bitmap);
1610 }
1611
1612 void ArchiveBuilder::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) {
1613 mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec);
1614 }
1615
1616 void ArchiveBuilder::print_region_stats(FileMapInfo *mapinfo, ArchiveHeapInfo* heap_info) {
1617 // Print statistics of all the regions
1618 const size_t bitmap_used = mapinfo->region_at(MetaspaceShared::bm)->used();
1619 const size_t bitmap_reserved = mapinfo->region_at(MetaspaceShared::bm)->used_aligned();
1620 const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() +
1621 bitmap_reserved +
1622 _total_heap_region_size;
1623 const size_t total_bytes = _ro_region.used() + _rw_region.used() +
1624 bitmap_used +
1625 _total_heap_region_size;
1626 const double total_u_perc = percent_of(total_bytes, total_reserved);
1627
1628 _rw_region.print(total_reserved);
1629 _ro_region.print(total_reserved);
1630
1631 print_bitmap_region_stats(bitmap_used, total_reserved);
1632
1633 if (heap_info->is_used()) {
1634 print_heap_region_stats(heap_info, total_reserved);
1635 }
1636
1637 log_debug(cds)("total : " SIZE_FORMAT_W(9) " [100.0%% of total] out of " SIZE_FORMAT_W(9) " bytes [%5.1f%% used]",
1638 total_bytes, total_reserved, total_u_perc);
1639 }
1640
1641 void ArchiveBuilder::print_bitmap_region_stats(size_t size, size_t total_size) {
1642 log_debug(cds)("bm space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used]",
1643 size, size/double(total_size)*100.0, size);
1644 }
1645
1646 void ArchiveBuilder::print_heap_region_stats(ArchiveHeapInfo *info, size_t total_size) {
1647 char* start = info->buffer_start();
1648 size_t size = info->buffer_byte_size();
1649 char* top = start + size;
1650 log_debug(cds)("hp space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used] at " INTPTR_FORMAT,
1651 size, size/double(total_size)*100.0, size, p2i(start));
1652 }
1653
1654 void ArchiveBuilder::report_out_of_space(const char* name, size_t needed_bytes) {
1655 // This is highly unlikely to happen on 64-bits because we have reserved a 4GB space.
1656 // On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes
1657 // or so.
1658 _rw_region.print_out_of_space_msg(name, needed_bytes);
1659 _ro_region.print_out_of_space_msg(name, needed_bytes);
1660
1661 log_error(cds)("Unable to allocate from '%s' region: Please reduce the number of shared classes.", name);
1662 MetaspaceShared::unrecoverable_writing_error();
1663 }