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/finalImageRecipes.hpp"
36 #include "cds/heapShared.hpp"
37 #include "cds/metaspaceShared.hpp"
38 #include "cds/regeneratedClasses.hpp"
39 #include "classfile/classLoader.hpp"
40 #include "classfile/classLoaderExt.hpp"
41 #include "classfile/classLoaderDataShared.hpp"
42 #include "classfile/javaClasses.hpp"
43 #include "classfile/symbolTable.hpp"
44 #include "classfile/systemDictionaryShared.hpp"
45 #include "classfile/vmClasses.hpp"
46 #include "interpreter/abstractInterpreter.hpp"
47 #include "jvm.h"
48 #include "logging/log.hpp"
49 #include "logging/logStream.hpp"
50 #include "memory/allStatic.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/methodCounters.hpp"
56 #include "oops/methodData.hpp"
57 #include "oops/objArrayKlass.hpp"
58 #include "oops/objArrayOop.inline.hpp"
59 #include "oops/oopHandle.inline.hpp"
60 #include "oops/trainingData.hpp"
61 #include "runtime/arguments.hpp"
62 #include "runtime/fieldDescriptor.inline.hpp"
63 #include "runtime/globals_extension.hpp"
64 #include "runtime/javaThread.hpp"
65 #include "runtime/sharedRuntime.hpp"
66 #include "utilities/align.hpp"
67 #include "utilities/bitMap.inline.hpp"
68 #include "utilities/formatBuffer.hpp"
69
70 ArchiveBuilder* ArchiveBuilder::_current = nullptr;
71
72 ArchiveBuilder::OtherROAllocMark::~OtherROAllocMark() {
73 char* newtop = ArchiveBuilder::current()->_ro_region.top();
74 ArchiveBuilder::alloc_stats()->record_other_type(int(newtop - _oldtop), true);
75 }
76
77 ArchiveBuilder::SourceObjList::SourceObjList() : _ptrmap(16 * K, mtClassShared) {
78 _total_bytes = 0;
79 _objs = new (mtClassShared) GrowableArray<SourceObjInfo*>(128 * K, mtClassShared);
80 }
81
82 ArchiveBuilder::SourceObjList::~SourceObjList() {
83 delete _objs;
84 }
85
86 void ArchiveBuilder::SourceObjList::append(SourceObjInfo* src_info) {
87 // Save this source object for copying
88 src_info->set_id(_objs->length());
89 _objs->append(src_info);
90
91 // Prepare for marking the pointers in this source object
92 assert(is_aligned(_total_bytes, sizeof(address)), "must be");
93 src_info->set_ptrmap_start(_total_bytes / sizeof(address));
94 _total_bytes = align_up(_total_bytes + (uintx)src_info->size_in_bytes(), sizeof(address));
95 src_info->set_ptrmap_end(_total_bytes / sizeof(address));
96
97 BitMap::idx_t bitmap_size_needed = BitMap::idx_t(src_info->ptrmap_end());
98 if (_ptrmap.size() <= bitmap_size_needed) {
99 _ptrmap.resize((bitmap_size_needed + 1) * 2);
100 }
101 }
102
103 void ArchiveBuilder::SourceObjList::remember_embedded_pointer(SourceObjInfo* src_info, MetaspaceClosure::Ref* ref) {
104 // src_obj contains a pointer. Remember the location of this pointer in _ptrmap,
105 // so that we can copy/relocate it later.
106 src_info->set_has_embedded_pointer();
107 address src_obj = src_info->source_addr();
108 address* field_addr = ref->addr();
109 assert(src_info->ptrmap_start() < _total_bytes, "sanity");
110 assert(src_info->ptrmap_end() <= _total_bytes, "sanity");
111 assert(*field_addr != nullptr, "should have checked");
112
113 intx field_offset_in_bytes = ((address)field_addr) - src_obj;
114 DEBUG_ONLY(int src_obj_size = src_info->size_in_bytes();)
115 assert(field_offset_in_bytes >= 0, "must be");
116 assert(field_offset_in_bytes + intx(sizeof(intptr_t)) <= intx(src_obj_size), "must be");
117 assert(is_aligned(field_offset_in_bytes, sizeof(address)), "must be");
118
119 BitMap::idx_t idx = BitMap::idx_t(src_info->ptrmap_start() + (uintx)(field_offset_in_bytes / sizeof(address)));
120 _ptrmap.set_bit(BitMap::idx_t(idx));
121 }
122
123 class RelocateEmbeddedPointers : public BitMapClosure {
124 ArchiveBuilder* _builder;
125 address _buffered_obj;
126 BitMap::idx_t _start_idx;
127 public:
128 RelocateEmbeddedPointers(ArchiveBuilder* builder, address buffered_obj, BitMap::idx_t start_idx) :
129 _builder(builder), _buffered_obj(buffered_obj), _start_idx(start_idx) {}
130
131 bool do_bit(BitMap::idx_t bit_offset) {
132 size_t field_offset = size_t(bit_offset - _start_idx) * sizeof(address);
133 address* ptr_loc = (address*)(_buffered_obj + field_offset);
134
135 address old_p = *ptr_loc;
136 address new_p = _builder->get_buffered_addr(old_p);
137
138 log_trace(cds)("Ref: [" PTR_FORMAT "] -> " PTR_FORMAT " => " PTR_FORMAT,
139 p2i(ptr_loc), p2i(old_p), p2i(new_p));
140
141 ArchivePtrMarker::set_and_mark_pointer(ptr_loc, new_p);
142 return true; // keep iterating the bitmap
143 }
144 };
145
146 void ArchiveBuilder::SourceObjList::relocate(int i, ArchiveBuilder* builder) {
147 SourceObjInfo* src_info = objs()->at(i);
148 assert(src_info->should_copy(), "must be");
149 BitMap::idx_t start = BitMap::idx_t(src_info->ptrmap_start()); // inclusive
150 BitMap::idx_t end = BitMap::idx_t(src_info->ptrmap_end()); // exclusive
151
152 RelocateEmbeddedPointers relocator(builder, src_info->buffered_addr(), start);
153 _ptrmap.iterate(&relocator, start, end);
154 }
155
156 ArchiveBuilder::ArchiveBuilder() :
157 _current_dump_region(nullptr),
158 _buffer_bottom(nullptr),
159 _last_verified_top(nullptr),
160 _num_dump_regions_used(0),
161 _other_region_used_bytes(0),
162 _requested_static_archive_bottom(nullptr),
163 _requested_static_archive_top(nullptr),
164 _requested_dynamic_archive_bottom(nullptr),
165 _requested_dynamic_archive_top(nullptr),
166 _mapped_static_archive_bottom(nullptr),
167 _mapped_static_archive_top(nullptr),
168 _buffer_to_requested_delta(0),
169 _rw_region("rw", MAX_SHARED_DELTA),
170 _ro_region("ro", MAX_SHARED_DELTA),
171 _cc_region("cc", MAX_SHARED_DELTA),
172 _ptrmap(mtClassShared),
173 _rw_ptrmap(mtClassShared),
174 _ro_ptrmap(mtClassShared),
175 _cc_ptrmap(mtClassShared),
176 _rw_src_objs(),
177 _ro_src_objs(),
178 _src_obj_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE),
179 _buffered_to_src_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE),
180 _total_heap_region_size(0),
181 _estimated_metaspaceobj_bytes(0),
182 _estimated_hashtable_bytes(0)
183 {
184 _klasses = new (mtClassShared) GrowableArray<Klass*>(4 * K, mtClassShared);
185 _symbols = new (mtClassShared) GrowableArray<Symbol*>(256 * K, mtClassShared);
186 _entropy_seed = 0x12345678;
187 assert(_current == nullptr, "must be");
188 _current = this;
189 }
190
191 ArchiveBuilder::~ArchiveBuilder() {
192 assert(_current == this, "must be");
193 _current = nullptr;
194
195 for (int i = 0; i < _symbols->length(); i++) {
196 _symbols->at(i)->decrement_refcount();
197 }
198
199 delete _klasses;
200 delete _symbols;
201 if (_shared_rs.is_reserved()) {
202 _shared_rs.release();
203 }
204 }
205
206 // Returns a deterministic sequence of pseudo random numbers. The main purpose is NOT
207 // for randomness but to get good entropy for the identity_hash() of archived Symbols,
208 // while keeping the contents of static CDS archives deterministic to ensure
209 // reproducibility of JDK builds.
210 int ArchiveBuilder::entropy() {
211 assert(SafepointSynchronize::is_at_safepoint(), "needed to ensure deterministic sequence");
212 _entropy_seed = os::next_random(_entropy_seed);
213 return static_cast<int>(_entropy_seed);
214 }
215
216 class GatherKlassesAndSymbols : public UniqueMetaspaceClosure {
217 ArchiveBuilder* _builder;
218
219 public:
220 GatherKlassesAndSymbols(ArchiveBuilder* builder) : _builder(builder) {}
221
222 virtual bool do_unique_ref(Ref* ref, bool read_only) {
223 return _builder->gather_klass_and_symbol(ref, read_only);
224 }
225 };
226
227 bool ArchiveBuilder::gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only) {
228 if (ref->obj() == nullptr) {
229 return false;
230 }
231 if (get_follow_mode(ref) != make_a_copy) {
232 return false;
233 }
234 if (ref->msotype() == MetaspaceObj::ClassType) {
235 Klass* klass = (Klass*)ref->obj();
236 assert(klass->is_klass(), "must be");
237 if (!is_excluded(klass)) {
238 _klasses->append(klass);
239 if (klass->is_hidden() && klass->is_instance_klass()) {
240 update_hidden_class_loader_type(InstanceKlass::cast(klass));
241 }
242 }
243 // See RunTimeClassInfo::get_for()
244 _estimated_metaspaceobj_bytes += align_up(BytesPerWord, SharedSpaceObjectAlignment);
245 } else if (ref->msotype() == MetaspaceObj::SymbolType) {
246 // Make sure the symbol won't be GC'ed while we are dumping the archive.
247 Symbol* sym = (Symbol*)ref->obj();
248 sym->increment_refcount();
249 _symbols->append(sym);
250 }
251
252 int bytes = ref->size() * BytesPerWord;
253 _estimated_metaspaceobj_bytes += align_up(bytes, SharedSpaceObjectAlignment);
254
255 return true; // recurse
256 }
257
258 void ArchiveBuilder::gather_klasses_and_symbols() {
259 ResourceMark rm;
260 log_info(cds)("Gathering classes and symbols ... ");
261 GatherKlassesAndSymbols doit(this);
262 iterate_roots(&doit);
263 #if INCLUDE_CDS_JAVA_HEAP
264 if (CDSConfig::is_dumping_full_module_graph()) {
265 ClassLoaderDataShared::iterate_symbols(&doit);
266 }
267 #endif
268 doit.finish();
269
270 if (CDSConfig::is_dumping_static_archive()) {
271 // To ensure deterministic contents in the static archive, we need to ensure that
272 // we iterate the MetaspaceObjs in a deterministic order. It doesn't matter where
273 // the MetaspaceObjs are located originally, as they are copied sequentially into
274 // the archive during the iteration.
275 //
276 // The only issue here is that the symbol table and the system directories may be
277 // randomly ordered, so we copy the symbols and klasses into two arrays and sort
278 // them deterministically.
279 //
280 // During -Xshare:dump, the order of Symbol creation is strictly determined by
281 // the SharedClassListFile (class loading is done in a single thread and the JIT
282 // is disabled). Also, Symbols are allocated in monotonically increasing addresses
283 // (see Symbol::operator new(size_t, int)). So if we iterate the Symbols by
284 // ascending address order, we ensure that all Symbols are copied into deterministic
285 // locations in the archive.
286 //
287 // TODO: in the future, if we want to produce deterministic contents in the
288 // dynamic archive, we might need to sort the symbols alphabetically (also see
289 // DynamicArchiveBuilder::sort_methods()).
290 log_info(cds)("Sorting symbols ... ");
291 _symbols->sort(compare_symbols_by_address);
292 sort_klasses();
293
294 // TODO -- we need a proper estimate for the archived modules, etc,
295 // but this should be enough for now
296 _estimated_metaspaceobj_bytes += 200 * 1024 * 1024;
297 }
298
299 AOTClassLinker::add_candidates();
300 }
301
302 #if INCLUDE_CDS_JAVA_HEAP
303
304 void ArchiveBuilder::update_hidden_class_loader_type(InstanceKlass* ik) {
305 s2 classloader_type;
306 if (HeapShared::is_lambda_form_klass(ik)) {
307 assert(CDSConfig::is_dumping_invokedynamic(), "lambda form classes are archived only if CDSConfig::is_dumping_invokedynamic() is true");
308 classloader_type = ClassLoader::BOOT_LOADER;
309 } else if (SystemDictionaryShared::should_hidden_class_be_archived(ik)) {
310 oop loader = ik->class_loader();
311
312 if (loader == nullptr) {
313 classloader_type = ClassLoader::BOOT_LOADER;
314 } else if (SystemDictionary::is_platform_class_loader(loader)) {
315 classloader_type = ClassLoader::PLATFORM_LOADER;
316 } else if (SystemDictionary::is_system_class_loader(loader)) {
317 classloader_type = ClassLoader::APP_LOADER;
318 } else {
319 ShouldNotReachHere();
320 }
321 } else {
322 ShouldNotReachHere();
323 }
324
325 ik->set_shared_class_loader_type(classloader_type);
326 if (HeapShared::is_lambda_proxy_klass(ik)) {
327 InstanceKlass* nest_host = ik->nest_host_not_null();
328 ik->set_shared_classpath_index(nest_host->shared_classpath_index());
329 } else if (!HeapShared::is_lambda_form_klass(ik)) {
330 // Injected invoker classes: fake this for now. Probably not needed!
331 if (classloader_type == ClassLoader::APP_LOADER) {
332 ik->set_shared_classpath_index(ClassLoaderExt::app_class_paths_start_index()); // HACK
333 } else {
334 ik->set_shared_classpath_index(0);
335 }
336 }
337 }
338
339 #endif //INCLUDE_CDS_JAVA_HEAP
340
341 int ArchiveBuilder::compare_symbols_by_address(Symbol** a, Symbol** b) {
342 if (a[0] < b[0]) {
343 return -1;
344 } else {
345 assert(a[0] > b[0], "Duplicated symbol %s unexpected", (*a)->as_C_string());
346 return 1;
347 }
348 }
349
350 int ArchiveBuilder::compare_klass_by_name(Klass** a, Klass** b) {
351 return a[0]->name()->fast_compare(b[0]->name());
352 }
353
354 void ArchiveBuilder::sort_klasses() {
355 log_info(cds)("Sorting classes ... ");
356 _klasses->sort(compare_klass_by_name);
357 }
358
359 size_t ArchiveBuilder::estimate_archive_size() {
360 // size of the symbol table and two dictionaries, plus the RunTimeClassInfo's
361 size_t symbol_table_est = SymbolTable::estimate_size_for_archive();
362 size_t dictionary_est = SystemDictionaryShared::estimate_size_for_archive();
363 size_t training_data_est = TrainingData::estimate_size_for_archive();
364 _estimated_hashtable_bytes = symbol_table_est + dictionary_est + training_data_est;
365
366 if (CDSConfig::is_dumping_aot_linked_classes()) {
367 _estimated_hashtable_bytes += _klasses->length() * 16 * sizeof(Klass*);
368 }
369
370 if (CDSConfig::is_dumping_final_static_archive()) {
371 _estimated_hashtable_bytes += 200 * 1024 * 1024; // FIXME -- need to iterate archived symbols??
372 }
373
374 if (CDSConfig::is_dumping_dynamic_archive()) {
375 // Some extra space for traning data. Be generous. Unused areas will be trimmed from the archive file.
376 _estimated_hashtable_bytes += 200 * 1024 * 1024;
377 }
378 size_t total = 0;
379
380 total += _estimated_metaspaceobj_bytes;
381 total += _estimated_hashtable_bytes;
382
383 // allow fragmentation at the end of each dump region
384 total += _total_dump_regions * MetaspaceShared::core_region_alignment();
385
386 log_info(cds)("_estimated_hashtable_bytes = " SIZE_FORMAT " + " SIZE_FORMAT " = " SIZE_FORMAT,
387 symbol_table_est, dictionary_est, _estimated_hashtable_bytes);
388 log_info(cds)("_estimated_metaspaceobj_bytes = " SIZE_FORMAT, _estimated_metaspaceobj_bytes);
389 log_info(cds)("total estimate bytes = " SIZE_FORMAT, total);
390
391 return align_up(total, MetaspaceShared::core_region_alignment());
392 }
393
394 address ArchiveBuilder::reserve_buffer() {
395 size_t buffer_size = estimate_archive_size();
396 ReservedSpace rs(buffer_size, MetaspaceShared::core_region_alignment(), os::vm_page_size());
397 if (!rs.is_reserved()) {
398 log_error(cds)("Failed to reserve " SIZE_FORMAT " bytes of output buffer.", buffer_size);
399 MetaspaceShared::unrecoverable_writing_error();
400 }
401
402 // buffer_bottom is the lowest address of the 2 core regions (rw, ro) when
403 // we are copying the class metadata into the buffer.
404 address buffer_bottom = (address)rs.base();
405 log_info(cds)("Reserved output buffer space at " PTR_FORMAT " [" SIZE_FORMAT " bytes]",
406 p2i(buffer_bottom), buffer_size);
407 _shared_rs = rs;
408
409 _buffer_bottom = buffer_bottom;
410 _last_verified_top = buffer_bottom;
411 _current_dump_region = &_rw_region;
412 _num_dump_regions_used = 1;
413 _other_region_used_bytes = 0;
414 _current_dump_region->init(&_shared_rs, &_shared_vs);
415
416 ArchivePtrMarker::initialize(&_ptrmap, &_shared_vs);
417
418 // The bottom of the static archive should be mapped at this address by default.
419 _requested_static_archive_bottom = (address)MetaspaceShared::requested_base_address();
420
421 // The bottom of the archive (that I am writing now) should be mapped at this address by default.
422 address my_archive_requested_bottom;
423
424 if (CDSConfig::is_dumping_static_archive()) {
425 my_archive_requested_bottom = _requested_static_archive_bottom;
426 } else {
427 _mapped_static_archive_bottom = (address)MetaspaceObj::shared_metaspace_base();
428 _mapped_static_archive_top = (address)MetaspaceObj::shared_metaspace_top();
429 assert(_mapped_static_archive_top >= _mapped_static_archive_bottom, "must be");
430 size_t static_archive_size = _mapped_static_archive_top - _mapped_static_archive_bottom;
431
432 // At run time, we will mmap the dynamic archive at my_archive_requested_bottom
433 _requested_static_archive_top = _requested_static_archive_bottom + static_archive_size;
434 my_archive_requested_bottom = align_up(_requested_static_archive_top, MetaspaceShared::core_region_alignment());
435
436 _requested_dynamic_archive_bottom = my_archive_requested_bottom;
437 }
438
439 _buffer_to_requested_delta = my_archive_requested_bottom - _buffer_bottom;
440
441 address my_archive_requested_top = my_archive_requested_bottom + buffer_size;
442 if (my_archive_requested_bottom < _requested_static_archive_bottom ||
443 my_archive_requested_top <= _requested_static_archive_bottom) {
444 // Size overflow.
445 log_error(cds)("my_archive_requested_bottom = " INTPTR_FORMAT, p2i(my_archive_requested_bottom));
446 log_error(cds)("my_archive_requested_top = " INTPTR_FORMAT, p2i(my_archive_requested_top));
447 log_error(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is too high. "
448 "Please rerun java -Xshare:dump with a lower value", p2i(_requested_static_archive_bottom));
449 MetaspaceShared::unrecoverable_writing_error();
450 }
451
452 if (CDSConfig::is_dumping_static_archive()) {
453 // We don't want any valid object to be at the very bottom of the archive.
454 // See ArchivePtrMarker::mark_pointer().
455 rw_region()->allocate(16);
456 }
457
458 return buffer_bottom;
459 }
460
461 void ArchiveBuilder::iterate_sorted_roots(MetaspaceClosure* it) {
462 int num_symbols = _symbols->length();
463 for (int i = 0; i < num_symbols; i++) {
464 it->push(_symbols->adr_at(i));
465 }
466
467 int num_klasses = _klasses->length();
468 for (int i = 0; i < num_klasses; i++) {
469 it->push(_klasses->adr_at(i));
470 }
471
472 iterate_roots(it);
473 }
474
475 class GatherSortedSourceObjs : public MetaspaceClosure {
476 ArchiveBuilder* _builder;
477
478 public:
479 GatherSortedSourceObjs(ArchiveBuilder* builder) : _builder(builder) {}
480
481 virtual bool do_ref(Ref* ref, bool read_only) {
482 return _builder->gather_one_source_obj(ref, read_only);
483 }
484 };
485
486 bool ArchiveBuilder::gather_one_source_obj(MetaspaceClosure::Ref* ref, bool read_only) {
487 address src_obj = ref->obj();
488 if (src_obj == nullptr) {
489 return false;
490 }
491
492 remember_embedded_pointer_in_enclosing_obj(ref);
493 if (RegeneratedClasses::has_been_regenerated(src_obj)) {
494 // No need to copy it. We will later relocate it to point to the regenerated klass/method.
495 return false;
496 }
497
498 FollowMode follow_mode = get_follow_mode(ref);
499 SourceObjInfo src_info(ref, read_only, follow_mode);
500 bool created;
501 SourceObjInfo* p = _src_obj_table.put_if_absent(src_obj, src_info, &created);
502 if (created) {
503 if (_src_obj_table.maybe_grow()) {
504 log_info(cds, hashtables)("Expanded _src_obj_table table to %d", _src_obj_table.table_size());
505 }
506 }
507
508 #ifdef ASSERT
509 if (ref->msotype() == MetaspaceObj::MethodType) {
510 Method* m = (Method*)ref->obj();
511 assert(!RegeneratedClasses::has_been_regenerated((address)m->method_holder()),
512 "Should not archive methods in a class that has been regenerated");
513 }
514 #endif
515
516 assert(p->read_only() == src_info.read_only(), "must be");
517
518 if (created && src_info.should_copy()) {
519 if (read_only) {
520 _ro_src_objs.append(p);
521 } else {
522 _rw_src_objs.append(p);
523 }
524 return true; // Need to recurse into this ref only if we are copying it
525 } else {
526 return false;
527 }
528 }
529
530 void ArchiveBuilder::record_regenerated_object(address orig_src_obj, address regen_src_obj) {
531 // Record the fact that orig_src_obj has been replaced by regen_src_obj. All calls to get_buffered_addr(orig_src_obj)
532 // should return the same value as get_buffered_addr(regen_src_obj).
533 SourceObjInfo* p = _src_obj_table.get(regen_src_obj);
534 assert(p != nullptr, "regenerated object should always be dumped");
535 SourceObjInfo orig_src_info(orig_src_obj, p);
536 bool created;
537 _src_obj_table.put_if_absent(orig_src_obj, orig_src_info, &created);
538 assert(created, "We shouldn't have archived the original copy of a regenerated object");
539 }
540
541 // Remember that we have a pointer inside ref->enclosing_obj() that points to ref->obj()
542 void ArchiveBuilder::remember_embedded_pointer_in_enclosing_obj(MetaspaceClosure::Ref* ref) {
543 assert(ref->obj() != nullptr, "should have checked");
544
545 address enclosing_obj = ref->enclosing_obj();
546 if (enclosing_obj == nullptr) {
547 return;
548 }
549
550 // We are dealing with 3 addresses:
551 // address o = ref->obj(): We have found an object whose address is o.
552 // address* mpp = ref->mpp(): The object o is pointed to by a pointer whose address is mpp.
553 // I.e., (*mpp == o)
554 // enclosing_obj : If non-null, it is the object which has a field that points to o.
555 // mpp is the address if that field.
556 //
557 // Example: We have an array whose first element points to a Method:
558 // Method* o = 0x0000abcd;
559 // Array<Method*>* enclosing_obj = 0x00001000;
560 // enclosing_obj->at_put(0, o);
561 //
562 // We the MetaspaceClosure iterates on the very first element of this array, we have
563 // ref->obj() == 0x0000abcd (the Method)
564 // ref->mpp() == 0x00001008 (the location of the first element in the array)
565 // ref->enclosing_obj() == 0x00001000 (the Array that contains the Method)
566 //
567 // We use the above information to mark the bitmap to indicate that there's a pointer on address 0x00001008.
568 SourceObjInfo* src_info = _src_obj_table.get(enclosing_obj);
569 if (src_info == nullptr || !src_info->should_copy()) {
570 // source objects of point_to_it/set_to_null types are not copied
571 // so we don't need to remember their pointers.
572 } else {
573 if (src_info->read_only()) {
574 _ro_src_objs.remember_embedded_pointer(src_info, ref);
575 } else {
576 _rw_src_objs.remember_embedded_pointer(src_info, ref);
577 }
578 }
579 }
580
581 void ArchiveBuilder::gather_source_objs() {
582 ResourceMark rm;
583 log_info(cds)("Gathering all archivable objects ... ");
584 gather_klasses_and_symbols();
585 GatherSortedSourceObjs doit(this);
586 iterate_sorted_roots(&doit);
587 doit.finish();
588 }
589
590 bool ArchiveBuilder::is_excluded(Klass* klass) {
591 if (klass->is_instance_klass()) {
592 InstanceKlass* ik = InstanceKlass::cast(klass);
593 return SystemDictionaryShared::is_excluded_class(ik);
594 } else if (klass->is_objArray_klass()) {
595 Klass* bottom = ObjArrayKlass::cast(klass)->bottom_klass();
596 if (CDSConfig::is_dumping_dynamic_archive() && MetaspaceShared::is_shared_static(bottom)) {
597 // The bottom class is in the static archive so it's clearly not excluded.
598 assert(CDSConfig::is_dumping_dynamic_archive(), "sanity");
599 return false;
600 } else if (bottom->is_instance_klass()) {
601 return SystemDictionaryShared::is_excluded_class(InstanceKlass::cast(bottom));
602 }
603 }
604
605 return false;
606 }
607
608 ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref *ref) {
609 address obj = ref->obj();
610 if (CDSConfig::is_dumping_dynamic_archive() && MetaspaceShared::is_in_shared_metaspace(obj)) {
611 // Don't dump existing shared metadata again.
612 return point_to_it;
613 } else if (ref->msotype() == MetaspaceObj::MethodDataType ||
614 ref->msotype() == MetaspaceObj::MethodCountersType ||
615 ref->msotype() == MetaspaceObj::KlassTrainingDataType ||
616 ref->msotype() == MetaspaceObj::MethodTrainingDataType ||
617 ref->msotype() == MetaspaceObj::CompileTrainingDataType) {
618 return TrainingData::need_data() ? make_a_copy : set_to_null;
619 } else {
620 if (ref->msotype() == MetaspaceObj::ClassType) {
621 Klass* klass = (Klass*)ref->obj();
622 assert(klass->is_klass(), "must be");
623 if (is_excluded(klass)) {
624 ResourceMark rm;
625 log_debug(cds, dynamic)("Skipping class (excluded): %s", klass->external_name());
626 return set_to_null;
627 }
628 }
629
630 return make_a_copy;
631 }
632 }
633
634 void ArchiveBuilder::start_dump_region(DumpRegion* next) {
635 address bottom = _last_verified_top;
636 address top = (address)(current_dump_region()->top());
637 _other_region_used_bytes += size_t(top - bottom);
638
639 current_dump_region()->pack(next);
640 _current_dump_region = next;
641 _num_dump_regions_used ++;
642
643 _last_verified_top = (address)(current_dump_region()->top());
644 }
645
646 void ArchiveBuilder::verify_estimate_size(size_t estimate, const char* which) {
647 address bottom = _last_verified_top;
648 address top = (address)(current_dump_region()->top());
649 size_t used = size_t(top - bottom) + _other_region_used_bytes;
650 int diff = int(estimate) - int(used);
651
652 log_info(cds)("%s estimate = " SIZE_FORMAT " used = " SIZE_FORMAT "; diff = %d bytes", which, estimate, used, diff);
653 assert(diff >= 0, "Estimate is too small");
654
655 _last_verified_top = top;
656 _other_region_used_bytes = 0;
657 }
658
659 char* ArchiveBuilder::ro_strdup(const char* s) {
660 char* archived_str = ro_region_alloc((int)strlen(s) + 1);
661 strcpy(archived_str, s);
662 return archived_str;
663 }
664
665 // The objects that have embedded pointers will sink
666 // towards the end of the list. This ensures we have a maximum
667 // number of leading zero bits in the relocation bitmap.
668 int ArchiveBuilder::compare_src_objs(SourceObjInfo** a, SourceObjInfo** b) {
669 if ((*a)->has_embedded_pointer() && !(*b)->has_embedded_pointer()) {
670 return 1;
671 } else if (!(*a)->has_embedded_pointer() && (*b)->has_embedded_pointer()) {
672 return -1;
673 } else {
674 // This is necessary to keep the sorting order stable. Otherwise the
675 // archive's contents may not be deterministic.
676 return (*a)->id() - (*b)->id();
677 }
678 }
679
680 void ArchiveBuilder::sort_metadata_objs() {
681 _rw_src_objs.objs()->sort(compare_src_objs);
682 _ro_src_objs.objs()->sort(compare_src_objs);
683 }
684
685 void ArchiveBuilder::dump_rw_metadata() {
686 ResourceMark rm;
687 log_info(cds)("Allocating RW objects ... ");
688 make_shallow_copies(&_rw_region, &_rw_src_objs);
689
690 #if INCLUDE_CDS_JAVA_HEAP
691 if (CDSConfig::is_dumping_full_module_graph()) {
692 // Archive the ModuleEntry's and PackageEntry's of the 3 built-in loaders
693 char* start = rw_region()->top();
694 ClassLoaderDataShared::allocate_archived_tables();
695 alloc_stats()->record_modules(rw_region()->top() - start, /*read_only*/false);
696 }
697 #endif
698 }
699
700 void ArchiveBuilder::dump_ro_metadata() {
701 ResourceMark rm;
702 log_info(cds)("Allocating RO objects ... ");
703
704 start_dump_region(&_ro_region);
705 make_shallow_copies(&_ro_region, &_ro_src_objs);
706
707 #if INCLUDE_CDS_JAVA_HEAP
708 if (CDSConfig::is_dumping_full_module_graph()) {
709 char* start = ro_region()->top();
710 ClassLoaderDataShared::init_archived_tables();
711 alloc_stats()->record_modules(ro_region()->top() - start, /*read_only*/true);
712 }
713 #endif
714
715 RegeneratedClasses::record_regenerated_objects();
716 }
717
718 void ArchiveBuilder::make_shallow_copies(DumpRegion *dump_region,
719 const ArchiveBuilder::SourceObjList* src_objs) {
720 for (int i = 0; i < src_objs->objs()->length(); i++) {
721 make_shallow_copy(dump_region, src_objs->objs()->at(i));
722 }
723 log_info(cds)("done (%d objects)", src_objs->objs()->length());
724 }
725
726 void ArchiveBuilder::make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info) {
727 address src = src_info->source_addr();
728 int bytes = src_info->size_in_bytes();
729 char* dest;
730 char* oldtop;
731 char* newtop;
732
733 oldtop = dump_region->top();
734 if (src_info->msotype() == MetaspaceObj::ClassType) {
735 // Save a pointer immediate in front of an InstanceKlass, so
736 // we can do a quick lookup from InstanceKlass* -> RunTimeClassInfo*
737 // without building another hashtable. See RunTimeClassInfo::get_for()
738 // in systemDictionaryShared.cpp.
739 Klass* klass = (Klass*)src;
740 if (klass->is_instance_klass()) {
741 SystemDictionaryShared::validate_before_archiving(InstanceKlass::cast(klass));
742 dump_region->allocate(sizeof(address));
743 }
744 }
745 dest = dump_region->allocate(bytes);
746 newtop = dump_region->top();
747
748 memcpy(dest, src, bytes);
749
750 // Update the hash of buffered sorted symbols for static dump so that the symbols have deterministic contents
751 if (CDSConfig::is_dumping_static_archive() && (src_info->msotype() == MetaspaceObj::SymbolType)) {
752 Symbol* buffered_symbol = (Symbol*)dest;
753 assert(((Symbol*)src)->is_permanent(), "archived symbols must be permanent");
754 buffered_symbol->update_identity_hash();
755 }
756
757 {
758 bool created;
759 _buffered_to_src_table.put_if_absent((address)dest, src, &created);
760 assert(created, "must be");
761 if (_buffered_to_src_table.maybe_grow()) {
762 log_info(cds, hashtables)("Expanded _buffered_to_src_table table to %d", _buffered_to_src_table.table_size());
763 }
764 }
765
766 intptr_t* archived_vtable = CppVtables::get_archived_vtable(src_info->msotype(), (address)dest);
767 if (archived_vtable != nullptr) {
768 *(address*)dest = (address)archived_vtable;
769 ArchivePtrMarker::mark_pointer((address*)dest);
770 }
771
772 log_trace(cds)("Copy: " PTR_FORMAT " ==> " PTR_FORMAT " %d", p2i(src), p2i(dest), bytes);
773 src_info->set_buffered_addr((address)dest);
774
775 _alloc_stats.record(src_info->msotype(), int(newtop - oldtop), src_info->read_only());
776 }
777
778 // This is used by code that hand-assembles data structures, such as the LambdaProxyClassKey, that are
779 // not handled by MetaspaceClosure.
780 void ArchiveBuilder::write_pointer_in_buffer(address* ptr_location, address src_addr) {
781 assert(is_in_buffer_space(ptr_location), "must be");
782 if (src_addr == nullptr) {
783 *ptr_location = nullptr;
784 ArchivePtrMarker::clear_pointer(ptr_location);
785 } else {
786 *ptr_location = get_buffered_addr(src_addr);
787 ArchivePtrMarker::mark_pointer(ptr_location);
788 }
789 }
790
791 void ArchiveBuilder::mark_and_relocate_to_buffered_addr(address* ptr_location) {
792 assert(*ptr_location != nullptr, "sanity");
793 if (!is_in_mapped_static_archive(*ptr_location)) {
794 *ptr_location = get_buffered_addr(*ptr_location);
795 }
796 ArchivePtrMarker::mark_pointer(ptr_location);
797 }
798
799 address ArchiveBuilder::get_buffered_addr(address src_addr) const {
800 SourceObjInfo* p = _src_obj_table.get(src_addr);
801 assert(p != nullptr, "src_addr " INTPTR_FORMAT " is used but has not been archived",
802 p2i(src_addr));
803
804 return p->buffered_addr();
805 }
806
807 bool ArchiveBuilder::has_been_archived(address src_addr) const {
808 SourceObjInfo* p = _src_obj_table.get(src_addr);
809 return (p != nullptr);
810 }
811
812 address ArchiveBuilder::get_source_addr(address buffered_addr) const {
813 assert(is_in_buffer_space(buffered_addr), "must be");
814 address* src_p = _buffered_to_src_table.get(buffered_addr);
815 assert(src_p != nullptr && *src_p != nullptr, "must be");
816 return *src_p;
817 }
818
819 void ArchiveBuilder::relocate_embedded_pointers(ArchiveBuilder::SourceObjList* src_objs) {
820 for (int i = 0; i < src_objs->objs()->length(); i++) {
821 src_objs->relocate(i, this);
822 }
823 }
824
825 void ArchiveBuilder::relocate_metaspaceobj_embedded_pointers() {
826 log_info(cds)("Relocating embedded pointers in core regions ... ");
827 relocate_embedded_pointers(&_rw_src_objs);
828 relocate_embedded_pointers(&_ro_src_objs);
829 }
830
831 #define ADD_COUNT(x) \
832 x += 1; \
833 x ## _a += aotlinked; \
834 x ## _i += inited;
835
836 #define DECLARE_INSTANCE_KLASS_COUNTER(x) \
837 int x = 0; \
838 int x ## _a = 0; \
839 int x ## _i = 0;
840
841 void ArchiveBuilder::make_klasses_shareable() {
842 DECLARE_INSTANCE_KLASS_COUNTER(num_instance_klasses);
843 DECLARE_INSTANCE_KLASS_COUNTER(num_boot_klasses);
844 DECLARE_INSTANCE_KLASS_COUNTER(num_vm_klasses);
845 DECLARE_INSTANCE_KLASS_COUNTER(num_platform_klasses);
846 DECLARE_INSTANCE_KLASS_COUNTER(num_app_klasses);
847 DECLARE_INSTANCE_KLASS_COUNTER(num_hidden_klasses);
848 DECLARE_INSTANCE_KLASS_COUNTER(num_unlinked_klasses);
849 DECLARE_INSTANCE_KLASS_COUNTER(num_unregistered_klasses);
850 int num_obj_array_klasses = 0;
851 int num_type_array_klasses = 0;
852
853 int boot_unlinked = 0;
854 int platform_unlinked = 0;
855 int app_unlinked = 0;
856 int unreg_unlinked = 0;
857
858 for (int i = 0; i < klasses()->length(); i++) {
859 // Some of the code in ConstantPool::remove_unshareable_info() requires the classes
860 // to be in linked state, so it must be call here before the next loop, which returns
861 // all classes to unlinked state.
862 Klass* k = get_buffered_addr(klasses()->at(i));
863 if (k->is_instance_klass()) {
864 InstanceKlass::cast(k)->constants()->remove_unshareable_info();
865 }
866 }
867
868 for (int i = 0; i < klasses()->length(); i++) {
869 const char* type;
870 const char* unlinked = "";
871 const char* kind = "";
872 const char* hidden = "";
873 const char* generated = "";
874 const char* aotlinked_msg = "";
875 const char* inited_msg = "";
876 Klass* k = get_buffered_addr(klasses()->at(i));
877 k->remove_java_mirror();
878 if (k->is_objArray_klass()) {
879 // InstanceKlass and TypeArrayKlass will in turn call remove_unshareable_info
880 // on their array classes.
881 num_obj_array_klasses ++;
882 type = "array";
883 } else if (k->is_typeArray_klass()) {
884 num_type_array_klasses ++;
885 type = "array";
886 k->remove_unshareable_info();
887 } else {
888 assert(k->is_instance_klass(), " must be");
889 InstanceKlass* ik = InstanceKlass::cast(k);
890 InstanceKlass* src_ik = get_source_addr(ik);
891 int aotlinked = AOTClassLinker::is_candidate(src_ik);
892 int inited = ik->has_preinitialized_mirror();
893 ADD_COUNT(num_instance_klasses);
894 if (CDSConfig::is_dumping_dynamic_archive()) {
895 // For static dump, class loader type are already set.
896 ik->assign_class_loader_type();
897 }
898 if (ik->is_hidden()) {
899 oop loader = k->class_loader();
900 if (loader == nullptr) {
901 type = "boot";
902 ADD_COUNT(num_boot_klasses);
903 } else if (loader == SystemDictionary::java_platform_loader()) {
904 type = "plat";
905 ADD_COUNT(num_platform_klasses);
906 } else if (loader == SystemDictionary::java_system_loader()) {
907 type = "app";
908 ADD_COUNT(num_app_klasses);
909 } else {
910 type = "bad";
911 assert(0, "shouldn't happen");
912 }
913 } else if (ik->is_shared_boot_class()) {
914 type = "boot";
915 ADD_COUNT(num_boot_klasses);
916 } else if (ik->is_shared_platform_class()) {
917 type = "plat";
918 ADD_COUNT(num_platform_klasses);
919 } else if (ik->is_shared_app_class()) {
920 type = "app";
921 ADD_COUNT(num_app_klasses);
922 } else {
923 assert(ik->is_shared_unregistered_class(), "must be");
924 type = "unreg";
925 ADD_COUNT(num_unregistered_klasses);
926 }
927
928 if (AOTClassLinker::is_vm_class(src_ik)) {
929 ADD_COUNT(num_vm_klasses);
930 }
931
932 if (!ik->is_linked()) {
933 ADD_COUNT(num_unlinked_klasses);
934 unlinked = " unlinked";
935 if (ik->is_shared_boot_class()) {
936 boot_unlinked ++;
937 } else if (ik->is_shared_platform_class()) {
938 platform_unlinked ++;
939 } else if (ik->is_shared_app_class()) {
940 app_unlinked ++;
941 } else {
942 unreg_unlinked ++;
943 }
944 }
945
946 if (ik->is_interface()) {
947 kind = " interface";
948 } else if (src_ik->java_super() == vmClasses::Enum_klass()) {
949 kind = " enum";
950 }
951
952 if (ik->is_hidden()) {
953 ADD_COUNT(num_hidden_klasses);
954 hidden = " hidden";
955 }
956
957 if (ik->is_generated_shared_class()) {
958 generated = " generated";
959 }
960 if (aotlinked) {
961 aotlinked_msg = " aot-linked";
962 }
963 if (inited) {
964 inited_msg = " inited";
965 }
966
967 MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread::current(), ik);
968 ik->remove_unshareable_info();
969 }
970
971 if (log_is_enabled(Debug, cds, class)) {
972 ResourceMark rm;
973 log_debug(cds, class)("klasses[%5d] = " PTR_FORMAT " %-5s %s%s%s%s%s%s%s", i,
974 p2i(to_requested(k)), type, k->external_name(),
975 kind, hidden, unlinked, generated, aotlinked_msg, inited_msg);
976 }
977 }
978
979 #define STATS_FORMAT "= %5d, aot-linked = %5d, inited = %5d"
980 #define STATS_PARAMS(x) num_ ## x, num_ ## x ## _a, num_ ## x ## _i
981
982 log_info(cds)("Number of classes %d", num_instance_klasses + num_obj_array_klasses + num_type_array_klasses);
983 log_info(cds)(" instance classes " STATS_FORMAT, STATS_PARAMS(instance_klasses));
984 log_info(cds)(" boot " STATS_FORMAT, STATS_PARAMS(boot_klasses));
985 log_info(cds)(" vm " STATS_FORMAT, STATS_PARAMS(vm_klasses));
986 log_info(cds)(" platform " STATS_FORMAT, STATS_PARAMS(platform_klasses));
987 log_info(cds)(" app " STATS_FORMAT, STATS_PARAMS(app_klasses));
988 log_info(cds)(" unregistered " STATS_FORMAT, STATS_PARAMS(unregistered_klasses));
989 log_info(cds)(" (hidden) " STATS_FORMAT, STATS_PARAMS(hidden_klasses));
990 log_info(cds)(" (unlinked) " STATS_FORMAT ", boot = %d, plat = %d, app = %d, unreg = %d",
991 STATS_PARAMS(unlinked_klasses),
992 boot_unlinked, platform_unlinked,
993 app_unlinked, unreg_unlinked);
994 log_info(cds)(" obj array classes = %5d", num_obj_array_klasses);
995 log_info(cds)(" type array classes = %5d", num_type_array_klasses);
996 log_info(cds)(" symbols = %5d", _symbols->length());
997
998 #undef STATS_FORMAT
999 #undef STATS_PARAMS
1000
1001 DynamicArchive::make_array_klasses_shareable();
1002 }
1003
1004 void ArchiveBuilder::make_training_data_shareable() {
1005 auto clean_td = [&] (address& src_obj, SourceObjInfo& info) {
1006 if (!is_in_buffer_space(info.buffered_addr())) {
1007 return;
1008 }
1009
1010 if (info.msotype() == MetaspaceObj::KlassTrainingDataType ||
1011 info.msotype() == MetaspaceObj::MethodTrainingDataType ||
1012 info.msotype() == MetaspaceObj::CompileTrainingDataType) {
1013 TrainingData* buffered_td = (TrainingData*)info.buffered_addr();
1014 buffered_td->remove_unshareable_info();
1015 } else if (info.msotype() == MetaspaceObj::MethodDataType) {
1016 MethodData* buffered_mdo = (MethodData*)info.buffered_addr();
1017 buffered_mdo->remove_unshareable_info();
1018 } else if (info.msotype() == MetaspaceObj::MethodCountersType) {
1019 MethodCounters* buffered_mc = (MethodCounters*)info.buffered_addr();
1020 buffered_mc->remove_unshareable_info();
1021 }
1022 };
1023 _src_obj_table.iterate_all(clean_td);
1024 }
1025
1026 void ArchiveBuilder::serialize_dynamic_archivable_items(SerializeClosure* soc) {
1027 SymbolTable::serialize_shared_table_header(soc, false);
1028 SystemDictionaryShared::serialize_dictionary_headers(soc, false);
1029 DynamicArchive::serialize_array_klasses(soc);
1030 AOTLinkedClassBulkLoader::serialize(soc, false);
1031 FinalImageRecipes::serialize(soc, false);
1032 TrainingData::serialize_training_data(soc);
1033 }
1034
1035 uintx ArchiveBuilder::buffer_to_offset(address p) const {
1036 address requested_p = to_requested(p);
1037 assert(requested_p >= _requested_static_archive_bottom, "must be");
1038 return requested_p - _requested_static_archive_bottom;
1039 }
1040
1041 uintx ArchiveBuilder::any_to_offset(address p) const {
1042 if (is_in_mapped_static_archive(p)) {
1043 assert(CDSConfig::is_dumping_dynamic_archive(), "must be");
1044 return p - _mapped_static_archive_bottom;
1045 }
1046 if (!is_in_buffer_space(p)) {
1047 // p must be a "source" address
1048 p = get_buffered_addr(p);
1049 }
1050 return buffer_to_offset(p);
1051 }
1052
1053 void ArchiveBuilder::start_cc_region() {
1054 ro_region()->pack();
1055 start_dump_region(&_cc_region);
1056 }
1057
1058 void ArchiveBuilder::end_cc_region() {
1059 _cc_region.pack();
1060 }
1061
1062 #if INCLUDE_CDS_JAVA_HEAP
1063 narrowKlass ArchiveBuilder::get_requested_narrow_klass(Klass* k) {
1064 assert(CDSConfig::is_dumping_heap(), "sanity");
1065 k = get_buffered_klass(k);
1066 Klass* requested_k = to_requested(k);
1067 address narrow_klass_base = _requested_static_archive_bottom; // runtime encoding base == runtime mapping start
1068 const int narrow_klass_shift = ArchiveHeapWriter::precomputed_narrow_klass_shift;
1069 return CompressedKlassPointers::encode_not_null(requested_k, narrow_klass_base, narrow_klass_shift);
1070 }
1071 #endif // INCLUDE_CDS_JAVA_HEAP
1072
1073 // RelocateBufferToRequested --- Relocate all the pointers in rw/ro,
1074 // so that the archive can be mapped to the "requested" location without runtime relocation.
1075 //
1076 // - See ArchiveBuilder header for the definition of "buffer", "mapped" and "requested"
1077 // - ArchivePtrMarker::ptrmap() marks all the pointers in the rw/ro regions
1078 // - Every pointer must have one of the following values:
1079 // [a] nullptr:
1080 // No relocation is needed. Remove this pointer from ptrmap so we don't need to
1081 // consider it at runtime.
1082 // [b] Points into an object X which is inside the buffer:
1083 // Adjust this pointer by _buffer_to_requested_delta, so it points to X
1084 // when the archive is mapped at the requested location.
1085 // [c] Points into an object Y which is inside mapped static archive:
1086 // - This happens only during dynamic dump
1087 // - Adjust this pointer by _mapped_to_requested_static_archive_delta,
1088 // so it points to Y when the static archive is mapped at the requested location.
1089 template <bool STATIC_DUMP>
1090 class RelocateBufferToRequested : public BitMapClosure {
1091 ArchiveBuilder* _builder;
1092 address _buffer_bottom;
1093 intx _buffer_to_requested_delta;
1094 intx _mapped_to_requested_static_archive_delta;
1095 size_t _max_non_null_offset;
1096
1097 public:
1098 RelocateBufferToRequested(ArchiveBuilder* builder) {
1099 _builder = builder;
1100 _buffer_bottom = _builder->buffer_bottom();
1101 _buffer_to_requested_delta = builder->buffer_to_requested_delta();
1102 _mapped_to_requested_static_archive_delta = builder->requested_static_archive_bottom() - builder->mapped_static_archive_bottom();
1103 _max_non_null_offset = 0;
1104
1105 address bottom = _builder->buffer_bottom();
1106 address top = _builder->buffer_top();
1107 address new_bottom = bottom + _buffer_to_requested_delta;
1108 address new_top = top + _buffer_to_requested_delta;
1109 log_debug(cds)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT "] to "
1110 "[" INTPTR_FORMAT " - " INTPTR_FORMAT "]",
1111 p2i(bottom), p2i(top),
1112 p2i(new_bottom), p2i(new_top));
1113 }
1114
1115 bool do_bit(size_t offset) {
1116 address* p = (address*)_buffer_bottom + offset;
1117 assert(_builder->is_in_buffer_space(p), "pointer must live in buffer space");
1118
1119 if (*p == nullptr) {
1120 // todo -- clear bit, etc
1121 ArchivePtrMarker::ptrmap()->clear_bit(offset);
1122 } else {
1123 if (STATIC_DUMP) {
1124 assert(_builder->is_in_buffer_space(*p), "old pointer must point inside buffer space");
1125 *p += _buffer_to_requested_delta;
1126 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive");
1127 } else {
1128 if (_builder->is_in_buffer_space(*p)) {
1129 *p += _buffer_to_requested_delta;
1130 // assert is in requested dynamic archive
1131 } else {
1132 assert(_builder->is_in_mapped_static_archive(*p), "old pointer must point inside buffer space or mapped static archive");
1133 *p += _mapped_to_requested_static_archive_delta;
1134 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive");
1135 }
1136 }
1137 _max_non_null_offset = offset;
1138 }
1139
1140 return true; // keep iterating
1141 }
1142
1143 void doit() {
1144 ArchivePtrMarker::ptrmap()->iterate(this);
1145 ArchivePtrMarker::compact(_max_non_null_offset);
1146 }
1147 };
1148
1149
1150 void ArchiveBuilder::relocate_to_requested() {
1151 if (!ro_region()->is_packed()) {
1152 ro_region()->pack();
1153 }
1154
1155 size_t my_archive_size = buffer_top() - buffer_bottom();
1156
1157 if (CDSConfig::is_dumping_static_archive()) {
1158 _requested_static_archive_top = _requested_static_archive_bottom + my_archive_size;
1159 RelocateBufferToRequested<true> patcher(this);
1160 patcher.doit();
1161 } else {
1162 assert(CDSConfig::is_dumping_dynamic_archive(), "must be");
1163 _requested_dynamic_archive_top = _requested_dynamic_archive_bottom + my_archive_size;
1164 RelocateBufferToRequested<false> patcher(this);
1165 patcher.doit();
1166 }
1167 }
1168
1169 // Write detailed info to a mapfile to analyze contents of the archive.
1170 // static dump:
1171 // java -Xshare:dump -Xlog:cds+map=trace:file=cds.map:none:filesize=0
1172 // dynamic dump:
1173 // java -cp MyApp.jar -XX:ArchiveClassesAtExit=MyApp.jsa \
1174 // -Xlog:cds+map=trace:file=cds.map:none:filesize=0 MyApp
1175 //
1176 // We need to do some address translation because the buffers used at dump time may be mapped to
1177 // a different location at runtime. At dump time, the buffers may be at arbitrary locations
1178 // picked by the OS. At runtime, we try to map at a fixed location (SharedBaseAddress). For
1179 // consistency, we log everything using runtime addresses.
1180 class ArchiveBuilder::CDSMapLogger : AllStatic {
1181 static intx buffer_to_runtime_delta() {
1182 // Translate the buffers used by the RW/RO regions to their eventual (requested) locations
1183 // at runtime.
1184 return ArchiveBuilder::current()->buffer_to_requested_delta();
1185 }
1186
1187 // rw/ro regions only
1188 static void log_metaspace_region(const char* name, DumpRegion* region,
1189 const ArchiveBuilder::SourceObjList* src_objs) {
1190 address region_base = address(region->base());
1191 address region_top = address(region->top());
1192 log_region(name, region_base, region_top, region_base + buffer_to_runtime_delta());
1193 log_metaspace_objects(region, src_objs);
1194 }
1195
1196 #define _LOG_PREFIX PTR_FORMAT ": @@ %-17s %d"
1197
1198 static void log_klass(Klass* k, address runtime_dest, const char* type_name, int bytes, Thread* current) {
1199 ResourceMark rm(current);
1200 log_debug(cds, map)(_LOG_PREFIX " %s",
1201 p2i(runtime_dest), type_name, bytes, k->external_name());
1202 }
1203 static void log_method(Method* m, address runtime_dest, const char* type_name, int bytes, Thread* current) {
1204 ResourceMark rm(current);
1205 log_debug(cds, map)(_LOG_PREFIX " %s",
1206 p2i(runtime_dest), type_name, bytes, m->external_name());
1207 }
1208
1209 // rw/ro regions only
1210 static void log_metaspace_objects(DumpRegion* region, const ArchiveBuilder::SourceObjList* src_objs) {
1211 address last_obj_base = address(region->base());
1212 address last_obj_end = address(region->base());
1213 address region_end = address(region->end());
1214 Thread* current = Thread::current();
1215 for (int i = 0; i < src_objs->objs()->length(); i++) {
1216 SourceObjInfo* src_info = src_objs->at(i);
1217 address src = src_info->source_addr();
1218 address dest = src_info->buffered_addr();
1219 log_as_hex(last_obj_base, dest, last_obj_base + buffer_to_runtime_delta());
1220 address runtime_dest = dest + buffer_to_runtime_delta();
1221 int bytes = src_info->size_in_bytes();
1222
1223 MetaspaceObj::Type type = src_info->msotype();
1224 const char* type_name = MetaspaceObj::type_name(type);
1225
1226 switch (type) {
1227 case MetaspaceObj::ClassType:
1228 log_klass((Klass*)src, runtime_dest, type_name, bytes, current);
1229 break;
1230 case MetaspaceObj::ConstantPoolType:
1231 log_klass(((ConstantPool*)src)->pool_holder(),
1232 runtime_dest, type_name, bytes, current);
1233 break;
1234 case MetaspaceObj::ConstantPoolCacheType:
1235 log_klass(((ConstantPoolCache*)src)->constant_pool()->pool_holder(),
1236 runtime_dest, type_name, bytes, current);
1237 break;
1238 case MetaspaceObj::MethodType:
1239 log_method((Method*)src, runtime_dest, type_name, bytes, current);
1240 break;
1241 case MetaspaceObj::ConstMethodType:
1242 log_method(((ConstMethod*)src)->method(), runtime_dest, type_name, bytes, current);
1243 break;
1244 case MetaspaceObj::SymbolType:
1245 {
1246 ResourceMark rm(current);
1247 Symbol* s = (Symbol*)src;
1248 log_debug(cds, map)(_LOG_PREFIX " %s", p2i(runtime_dest), type_name, bytes,
1249 s->as_quoted_ascii());
1250 }
1251 break;
1252 default:
1253 log_debug(cds, map)(_LOG_PREFIX, p2i(runtime_dest), type_name, bytes);
1254 break;
1255 }
1256
1257 last_obj_base = dest;
1258 last_obj_end = dest + bytes;
1259 }
1260
1261 log_as_hex(last_obj_base, last_obj_end, last_obj_base + buffer_to_runtime_delta());
1262 if (last_obj_end < region_end) {
1263 log_debug(cds, map)(PTR_FORMAT ": @@ Misc data " SIZE_FORMAT " bytes",
1264 p2i(last_obj_end + buffer_to_runtime_delta()),
1265 size_t(region_end - last_obj_end));
1266 log_as_hex(last_obj_end, region_end, last_obj_end + buffer_to_runtime_delta());
1267 }
1268 }
1269
1270 #undef _LOG_PREFIX
1271
1272 // Log information about a region, whose address at dump time is [base .. top). At
1273 // runtime, this region will be mapped to requested_base. requested_base is 0 if this
1274 // region will be mapped at os-selected addresses (such as the bitmap region), or will
1275 // be accessed with os::read (the header).
1276 //
1277 // Note: across -Xshare:dump runs, base may be different, but requested_base should
1278 // be the same as the archive contents should be deterministic.
1279 static void log_region(const char* name, address base, address top, address requested_base) {
1280 size_t size = top - base;
1281 base = requested_base;
1282 top = requested_base + size;
1283 log_info(cds, map)("[%-18s " PTR_FORMAT " - " PTR_FORMAT " " SIZE_FORMAT_W(9) " bytes]",
1284 name, p2i(base), p2i(top), size);
1285 }
1286
1287 #if INCLUDE_CDS_JAVA_HEAP
1288 static void log_heap_region(ArchiveHeapInfo* heap_info) {
1289 MemRegion r = heap_info->buffer_region();
1290 address start = address(r.start()); // start of the current oop inside the buffer
1291 address end = address(r.end());
1292 log_region("heap", start, end, ArchiveHeapWriter::buffered_addr_to_requested_addr(start));
1293
1294 LogStreamHandle(Info, cds, map) st;
1295
1296 HeapRootSegments segments = heap_info->heap_root_segments();
1297 assert(segments.base_offset() == 0, "Sanity");
1298
1299 for (size_t seg_idx = 0; seg_idx < segments.count(); seg_idx++) {
1300 address requested_start = ArchiveHeapWriter::buffered_addr_to_requested_addr(start);
1301 st.print_cr(PTR_FORMAT ": Heap roots segment [%d]",
1302 p2i(requested_start), segments.size_in_elems(seg_idx));
1303 start += segments.size_in_bytes(seg_idx);
1304 }
1305 log_heap_roots();
1306
1307 while (start < end) {
1308 size_t byte_size;
1309 oop source_oop = ArchiveHeapWriter::buffered_addr_to_source_obj(start);
1310 address requested_start = ArchiveHeapWriter::buffered_addr_to_requested_addr(start);
1311 st.print(PTR_FORMAT ": @@ Object ", p2i(requested_start));
1312
1313 if (source_oop != nullptr) {
1314 // This is a regular oop that got archived.
1315 print_oop_with_requested_addr_cr(&st, source_oop, false);
1316 byte_size = source_oop->size() * BytesPerWord;
1317 } else if ((byte_size = ArchiveHeapWriter::get_filler_size_at(start)) > 0) {
1318 // We have a filler oop, which also does not exist in BufferOffsetToSourceObjectTable.
1319 st.print_cr("filler " SIZE_FORMAT " bytes", byte_size);
1320 } else {
1321 ShouldNotReachHere();
1322 }
1323
1324 address oop_end = start + byte_size;
1325 log_as_hex(start, oop_end, requested_start, /*is_heap=*/true);
1326
1327 if (source_oop != nullptr) {
1328 log_oop_details(heap_info, source_oop, /*buffered_addr=*/start);
1329 }
1330 start = oop_end;
1331 }
1332 }
1333
1334 // ArchivedFieldPrinter is used to print the fields of archived objects. We can't
1335 // use _source_obj->print_on(), because we want to print the oop fields
1336 // in _source_obj with their requested addresses using print_oop_with_requested_addr_cr().
1337 class ArchivedFieldPrinter : public FieldClosure {
1338 ArchiveHeapInfo* _heap_info;
1339 outputStream* _st;
1340 oop _source_obj;
1341 address _buffered_addr;
1342 public:
1343 ArchivedFieldPrinter(ArchiveHeapInfo* heap_info, outputStream* st, oop src_obj, address buffered_addr) :
1344 _heap_info(heap_info), _st(st), _source_obj(src_obj), _buffered_addr(buffered_addr) {}
1345
1346 void do_field(fieldDescriptor* fd) {
1347 _st->print(" - ");
1348 BasicType ft = fd->field_type();
1349 switch (ft) {
1350 case T_ARRAY:
1351 case T_OBJECT:
1352 fd->print_on(_st); // print just the name and offset
1353 print_oop_with_requested_addr_cr(_st, _source_obj->obj_field(fd->offset()));
1354 break;
1355 default:
1356 if (ArchiveHeapWriter::is_marked_as_native_pointer(_heap_info, _source_obj, fd->offset())) {
1357 print_as_native_pointer(fd);
1358 } else {
1359 fd->print_on_for(_st, cast_to_oop(_buffered_addr)); // name, offset, value
1360 _st->cr();
1361 }
1362 }
1363 }
1364
1365 void print_as_native_pointer(fieldDescriptor* fd) {
1366 LP64_ONLY(assert(fd->field_type() == T_LONG, "must be"));
1367 NOT_LP64 (assert(fd->field_type() == T_INT, "must be"));
1368
1369 // We have a field that looks like an integer, but it's actually a pointer to a MetaspaceObj.
1370 address source_native_ptr = (address)
1371 LP64_ONLY(_source_obj->long_field(fd->offset()))
1372 NOT_LP64( _source_obj->int_field (fd->offset()));
1373 ArchiveBuilder* builder = ArchiveBuilder::current();
1374
1375 // The value of the native pointer at runtime.
1376 address requested_native_ptr = builder->to_requested(builder->get_buffered_addr(source_native_ptr));
1377
1378 // The address of _source_obj at runtime
1379 oop requested_obj = ArchiveHeapWriter::source_obj_to_requested_obj(_source_obj);
1380 // The address of this field in the requested space
1381 assert(requested_obj != nullptr, "Attempting to load field from null oop");
1382 address requested_field_addr = cast_from_oop<address>(requested_obj) + fd->offset();
1383
1384 fd->print_on(_st);
1385 _st->print_cr(PTR_FORMAT " (marked metadata pointer @" PTR_FORMAT " )",
1386 p2i(requested_native_ptr), p2i(requested_field_addr));
1387 }
1388 };
1389
1390 // Print the fields of instanceOops, or the elements of arrayOops
1391 static void log_oop_details(ArchiveHeapInfo* heap_info, oop source_oop, address buffered_addr) {
1392 LogStreamHandle(Trace, cds, map, oops) st;
1393 if (st.is_enabled()) {
1394 Klass* source_klass = source_oop->klass();
1395 ArchiveBuilder* builder = ArchiveBuilder::current();
1396 Klass* requested_klass = builder->to_requested(builder->get_buffered_addr(source_klass));
1397
1398 st.print(" - klass: ");
1399 source_klass->print_value_on(&st);
1400 st.print(" " PTR_FORMAT, p2i(requested_klass));
1401 st.cr();
1402
1403 if (source_oop->is_typeArray()) {
1404 TypeArrayKlass::cast(source_klass)->oop_print_elements_on(typeArrayOop(source_oop), &st);
1405 } else if (source_oop->is_objArray()) {
1406 objArrayOop source_obj_array = objArrayOop(source_oop);
1407 for (int i = 0; i < source_obj_array->length(); i++) {
1408 st.print(" -%4d: ", i);
1409 print_oop_with_requested_addr_cr(&st, source_obj_array->obj_at(i));
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 st.print(" - signature: ");
1418 if (java_lang_Class::is_primitive(source_oop)) {
1419 st.print("primitive ??");
1420 } else {
1421 java_lang_Class::print_signature(source_oop, &st);
1422 }
1423 st.cr();
1424 }
1425 }
1426 }
1427 }
1428
1429 static void log_heap_roots() {
1430 LogStreamHandle(Trace, cds, map, oops) st;
1431 if (st.is_enabled()) {
1432 for (int i = 0; i < HeapShared::pending_roots()->length(); i++) {
1433 st.print("roots[%4d]: ", i);
1434 print_oop_with_requested_addr_cr(&st, HeapShared::pending_roots()->at(i).resolve());
1435 }
1436 }
1437 }
1438
1439 // The output looks like this. The first number is the requested address. The second number is
1440 // the narrowOop version of the requested address.
1441 // 0x00000007ffc7e840 (0xfff8fd08) java.lang.Class
1442 // 0x00000007ffc000f8 (0xfff8001f) [B length: 11
1443 static void print_oop_with_requested_addr_cr(outputStream* st, oop source_oop, bool print_addr = true) {
1444 if (source_oop == nullptr) {
1445 st->print_cr("null");
1446 } else {
1447 ResourceMark rm;
1448 oop requested_obj = ArchiveHeapWriter::source_obj_to_requested_obj(source_oop);
1449 if (print_addr) {
1450 st->print(PTR_FORMAT " ", p2i(requested_obj));
1451 }
1452 if (UseCompressedOops) {
1453 st->print("(0x%08x) ", CompressedOops::narrow_oop_value(requested_obj));
1454 }
1455 if (source_oop->is_array()) {
1456 int array_len = arrayOop(source_oop)->length();
1457 st->print_cr("%s length: %d", source_oop->klass()->external_name(), array_len);
1458 } else {
1459 st->print("%s", source_oop->klass()->external_name());
1460 if (java_lang_invoke_MethodType::is_instance(source_oop)) {
1461 st->print(" ");
1462 java_lang_invoke_MethodType::print_signature(source_oop, st);
1463 }
1464 st->cr();
1465 }
1466 }
1467 }
1468 #endif // INCLUDE_CDS_JAVA_HEAP
1469
1470 // Log all the data [base...top). Pretend that the base address
1471 // will be mapped to requested_base at run-time.
1472 static void log_as_hex(address base, address top, address requested_base, bool is_heap = false) {
1473 assert(top >= base, "must be");
1474
1475 LogStreamHandle(Trace, cds, map) lsh;
1476 if (lsh.is_enabled()) {
1477 int unitsize = sizeof(address);
1478 if (is_heap && UseCompressedOops) {
1479 // This makes the compressed oop pointers easier to read, but
1480 // longs and doubles will be split into two words.
1481 unitsize = sizeof(narrowOop);
1482 }
1483 os::print_hex_dump(&lsh, base, top, unitsize, /* print_ascii=*/true, /* bytes_per_line=*/32, requested_base);
1484 }
1485 }
1486
1487 static void log_header(FileMapInfo* mapinfo) {
1488 LogStreamHandle(Info, cds, map) lsh;
1489 if (lsh.is_enabled()) {
1490 mapinfo->print(&lsh);
1491 }
1492 }
1493
1494 public:
1495 static void log(ArchiveBuilder* builder, FileMapInfo* mapinfo,
1496 ArchiveHeapInfo* heap_info,
1497 char* bitmap, size_t bitmap_size_in_bytes) {
1498 log_info(cds, map)("%s CDS archive map for %s", CDSConfig::is_dumping_static_archive() ? "Static" : "Dynamic", mapinfo->full_path());
1499
1500 address header = address(mapinfo->header());
1501 address header_end = header + mapinfo->header()->header_size();
1502 log_region("header", header, header_end, nullptr);
1503 log_header(mapinfo);
1504 log_as_hex(header, header_end, nullptr);
1505
1506 DumpRegion* rw_region = &builder->_rw_region;
1507 DumpRegion* ro_region = &builder->_ro_region;
1508
1509 log_metaspace_region("rw region", rw_region, &builder->_rw_src_objs);
1510 log_metaspace_region("ro region", ro_region, &builder->_ro_src_objs);
1511
1512 address bitmap_end = address(bitmap + bitmap_size_in_bytes);
1513 log_region("bitmap", address(bitmap), bitmap_end, nullptr);
1514 log_as_hex((address)bitmap, bitmap_end, nullptr);
1515
1516 #if INCLUDE_CDS_JAVA_HEAP
1517 if (heap_info->is_used()) {
1518 log_heap_region(heap_info);
1519 }
1520 #endif
1521
1522 log_info(cds, map)("[End of CDS archive map]");
1523 }
1524 }; // end ArchiveBuilder::CDSMapLogger
1525
1526 void ArchiveBuilder::print_stats() {
1527 _alloc_stats.print_stats(int(_ro_region.used()), int(_rw_region.used()));
1528 }
1529
1530 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo, ArchiveHeapInfo* heap_info) {
1531 // Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with
1532 // MetaspaceShared::n_regions (internal to hotspot).
1533 assert(NUM_CDS_REGIONS == MetaspaceShared::n_regions, "sanity");
1534
1535 write_region(mapinfo, MetaspaceShared::rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false);
1536 write_region(mapinfo, MetaspaceShared::ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false);
1537 write_region(mapinfo, MetaspaceShared::cc, &_cc_region, /*read_only=*/false,/*allow_exec=*/false);
1538
1539 // Split pointer map into read-write and read-only bitmaps
1540 ArchivePtrMarker::initialize_rw_ro_cc_maps(&_rw_ptrmap, &_ro_ptrmap, &_cc_ptrmap);
1541
1542 size_t bitmap_size_in_bytes;
1543 char* bitmap = mapinfo->write_bitmap_region(ArchivePtrMarker::rw_ptrmap(),
1544 ArchivePtrMarker::ro_ptrmap(),
1545 ArchivePtrMarker::cc_ptrmap(),
1546 heap_info,
1547 bitmap_size_in_bytes);
1548
1549 if (heap_info->is_used()) {
1550 _total_heap_region_size = mapinfo->write_heap_region(heap_info);
1551 }
1552
1553 print_region_stats(mapinfo, heap_info);
1554
1555 mapinfo->set_requested_base((char*)MetaspaceShared::requested_base_address());
1556 mapinfo->set_header_crc(mapinfo->compute_header_crc());
1557 // After this point, we should not write any data into mapinfo->header() since this
1558 // would corrupt its checksum we have calculated before.
1559 mapinfo->write_header();
1560 mapinfo->close();
1561
1562 if (log_is_enabled(Info, cds)) {
1563 print_stats();
1564 }
1565
1566 if (log_is_enabled(Info, cds, map)) {
1567 CDSMapLogger::log(this, mapinfo, heap_info,
1568 bitmap, bitmap_size_in_bytes);
1569 }
1570 CDS_JAVA_HEAP_ONLY(HeapShared::destroy_archived_object_cache());
1571 FREE_C_HEAP_ARRAY(char, bitmap);
1572 }
1573
1574 void ArchiveBuilder::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) {
1575 mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec);
1576 }
1577
1578 void ArchiveBuilder::print_region_stats(FileMapInfo *mapinfo, ArchiveHeapInfo* heap_info) {
1579 // Print statistics of all the regions
1580 const size_t bitmap_used = mapinfo->region_at(MetaspaceShared::bm)->used();
1581 const size_t bitmap_reserved = mapinfo->region_at(MetaspaceShared::bm)->used_aligned();
1582 const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() +
1583 bitmap_reserved +
1584 _total_heap_region_size;
1585 const size_t total_bytes = _ro_region.used() + _rw_region.used() +
1586 bitmap_used +
1587 _total_heap_region_size;
1588 const double total_u_perc = percent_of(total_bytes, total_reserved);
1589
1590 _rw_region.print(total_reserved);
1591 _ro_region.print(total_reserved);
1592 _cc_region.print(total_reserved);
1593
1594 print_bitmap_region_stats(bitmap_used, total_reserved);
1595
1596 if (heap_info->is_used()) {
1597 print_heap_region_stats(heap_info, total_reserved);
1598 }
1599
1600 log_debug(cds)("total : " SIZE_FORMAT_W(9) " [100.0%% of total] out of " SIZE_FORMAT_W(9) " bytes [%5.1f%% used]",
1601 total_bytes, total_reserved, total_u_perc);
1602 }
1603
1604 void ArchiveBuilder::print_bitmap_region_stats(size_t size, size_t total_size) {
1605 log_debug(cds)("bm space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used]",
1606 size, size/double(total_size)*100.0, size);
1607 }
1608
1609 void ArchiveBuilder::print_heap_region_stats(ArchiveHeapInfo *info, size_t total_size) {
1610 char* start = info->buffer_start();
1611 size_t size = info->buffer_byte_size();
1612 char* top = start + size;
1613 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,
1614 size, size/double(total_size)*100.0, size, p2i(start));
1615 }
1616
1617 void ArchiveBuilder::report_out_of_space(const char* name, size_t needed_bytes) {
1618 // This is highly unlikely to happen on 64-bits because we have reserved a 4GB space.
1619 // On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes
1620 // or so.
1621 _rw_region.print_out_of_space_msg(name, needed_bytes);
1622 _ro_region.print_out_of_space_msg(name, needed_bytes);
1623
1624 log_error(cds)("Unable to allocate from '%s' region: Please reduce the number of shared classes.", name);
1625 MetaspaceShared::unrecoverable_writing_error();
1626 }