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/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oopHandle.inline.hpp"
58 #include "oops/trainingData.hpp"
59 #include "runtime/arguments.hpp"
60 #include "runtime/fieldDescriptor.inline.hpp"
61 #include "runtime/globals_extension.hpp"
62 #include "runtime/javaThread.hpp"
63 #include "runtime/sharedRuntime.hpp"
64 #include "utilities/align.hpp"
65 #include "utilities/bitMap.inline.hpp"
66 #include "utilities/formatBuffer.hpp"
67
68 ArchiveBuilder* ArchiveBuilder::_current = nullptr;
69
70 ArchiveBuilder::OtherROAllocMark::~OtherROAllocMark() {
71 char* newtop = ArchiveBuilder::current()->_ro_region.top();
72 ArchiveBuilder::alloc_stats()->record_other_type(int(newtop - _oldtop), true);
73 }
74
75 ArchiveBuilder::SourceObjList::SourceObjList() : _ptrmap(16 * K, mtClassShared) {
76 _total_bytes = 0;
77 _objs = new (mtClassShared) GrowableArray<SourceObjInfo*>(128 * K, mtClassShared);
78 }
79
80 ArchiveBuilder::SourceObjList::~SourceObjList() {
81 delete _objs;
82 }
83
84 void ArchiveBuilder::SourceObjList::append(SourceObjInfo* src_info) {
85 // Save this source object for copying
86 src_info->set_id(_objs->length());
87 _objs->append(src_info);
88
89 // Prepare for marking the pointers in this source object
90 assert(is_aligned(_total_bytes, sizeof(address)), "must be");
91 src_info->set_ptrmap_start(_total_bytes / sizeof(address));
92 _total_bytes = align_up(_total_bytes + (uintx)src_info->size_in_bytes(), sizeof(address));
93 src_info->set_ptrmap_end(_total_bytes / sizeof(address));
94
95 BitMap::idx_t bitmap_size_needed = BitMap::idx_t(src_info->ptrmap_end());
96 if (_ptrmap.size() <= bitmap_size_needed) {
97 _ptrmap.resize((bitmap_size_needed + 1) * 2);
98 }
99 }
100
101 void ArchiveBuilder::SourceObjList::remember_embedded_pointer(SourceObjInfo* src_info, MetaspaceClosure::Ref* ref) {
102 // src_obj contains a pointer. Remember the location of this pointer in _ptrmap,
103 // so that we can copy/relocate it later.
104 src_info->set_has_embedded_pointer();
105 address src_obj = src_info->source_addr();
106 address* field_addr = ref->addr();
107 assert(src_info->ptrmap_start() < _total_bytes, "sanity");
108 assert(src_info->ptrmap_end() <= _total_bytes, "sanity");
109 assert(*field_addr != nullptr, "should have checked");
110
111 intx field_offset_in_bytes = ((address)field_addr) - src_obj;
112 DEBUG_ONLY(int src_obj_size = src_info->size_in_bytes();)
113 assert(field_offset_in_bytes >= 0, "must be");
114 assert(field_offset_in_bytes + intx(sizeof(intptr_t)) <= intx(src_obj_size), "must be");
115 assert(is_aligned(field_offset_in_bytes, sizeof(address)), "must be");
116
117 BitMap::idx_t idx = BitMap::idx_t(src_info->ptrmap_start() + (uintx)(field_offset_in_bytes / sizeof(address)));
118 _ptrmap.set_bit(BitMap::idx_t(idx));
119 }
120
121 class RelocateEmbeddedPointers : public BitMapClosure {
122 ArchiveBuilder* _builder;
123 address _buffered_obj;
124 BitMap::idx_t _start_idx;
125 public:
126 RelocateEmbeddedPointers(ArchiveBuilder* builder, address buffered_obj, BitMap::idx_t start_idx) :
127 _builder(builder), _buffered_obj(buffered_obj), _start_idx(start_idx) {}
128
129 bool do_bit(BitMap::idx_t bit_offset) {
130 size_t field_offset = size_t(bit_offset - _start_idx) * sizeof(address);
131 address* ptr_loc = (address*)(_buffered_obj + field_offset);
132
133 address old_p = *ptr_loc;
134 address new_p = _builder->get_buffered_addr(old_p);
135
136 log_trace(cds)("Ref: [" PTR_FORMAT "] -> " PTR_FORMAT " => " PTR_FORMAT,
137 p2i(ptr_loc), p2i(old_p), p2i(new_p));
138
139 ArchivePtrMarker::set_and_mark_pointer(ptr_loc, new_p);
140 return true; // keep iterating the bitmap
141 }
142 };
143
144 void ArchiveBuilder::SourceObjList::relocate(int i, ArchiveBuilder* builder) {
145 SourceObjInfo* src_info = objs()->at(i);
146 assert(src_info->should_copy(), "must be");
147 BitMap::idx_t start = BitMap::idx_t(src_info->ptrmap_start()); // inclusive
148 BitMap::idx_t end = BitMap::idx_t(src_info->ptrmap_end()); // exclusive
149
150 RelocateEmbeddedPointers relocator(builder, src_info->buffered_addr(), start);
151 _ptrmap.iterate(&relocator, start, end);
152 }
153
154 ArchiveBuilder::ArchiveBuilder() :
155 _current_dump_region(nullptr),
156 _buffer_bottom(nullptr),
157 _last_verified_top(nullptr),
158 _num_dump_regions_used(0),
159 _other_region_used_bytes(0),
160 _requested_static_archive_bottom(nullptr),
161 _requested_static_archive_top(nullptr),
162 _requested_dynamic_archive_bottom(nullptr),
163 _requested_dynamic_archive_top(nullptr),
164 _mapped_static_archive_bottom(nullptr),
165 _mapped_static_archive_top(nullptr),
166 _buffer_to_requested_delta(0),
167 _rw_region("rw", MAX_SHARED_DELTA),
168 _ro_region("ro", MAX_SHARED_DELTA),
169 _cc_region("cc", MAX_SHARED_DELTA),
170 _ptrmap(mtClassShared),
171 _rw_ptrmap(mtClassShared),
172 _ro_ptrmap(mtClassShared),
173 _cc_ptrmap(mtClassShared),
174 _rw_src_objs(),
175 _ro_src_objs(),
176 _src_obj_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE),
177 _buffered_to_src_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE),
178 _total_heap_region_size(0),
179 _estimated_metaspaceobj_bytes(0),
180 _estimated_hashtable_bytes(0)
181 {
182 _klasses = new (mtClassShared) GrowableArray<Klass*>(4 * K, mtClassShared);
183 _symbols = new (mtClassShared) GrowableArray<Symbol*>(256 * K, mtClassShared);
184 _entropy_seed = 0x12345678;
185 assert(_current == nullptr, "must be");
186 _current = this;
187 }
188
189 ArchiveBuilder::~ArchiveBuilder() {
190 assert(_current == this, "must be");
191 _current = nullptr;
192
193 for (int i = 0; i < _symbols->length(); i++) {
194 _symbols->at(i)->decrement_refcount();
195 }
196
197 delete _klasses;
198 delete _symbols;
199 if (_shared_rs.is_reserved()) {
200 _shared_rs.release();
201 }
202 }
203
204 // Returns a deterministic sequence of pseudo random numbers. The main purpose is NOT
205 // for randomness but to get good entropy for the identity_hash() of archived Symbols,
206 // while keeping the contents of static CDS archives deterministic to ensure
207 // reproducibility of JDK builds.
208 int ArchiveBuilder::entropy() {
209 assert(SafepointSynchronize::is_at_safepoint(), "needed to ensure deterministic sequence");
210 _entropy_seed = os::next_random(_entropy_seed);
211 return static_cast<int>(_entropy_seed);
212 }
213
214 class GatherKlassesAndSymbols : public UniqueMetaspaceClosure {
215 ArchiveBuilder* _builder;
216
217 public:
218 GatherKlassesAndSymbols(ArchiveBuilder* builder) : _builder(builder) {}
219
220 virtual bool do_unique_ref(Ref* ref, bool read_only) {
221 return _builder->gather_klass_and_symbol(ref, read_only);
222 }
223 };
224
225 bool ArchiveBuilder::gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only) {
226 if (ref->obj() == nullptr) {
227 return false;
228 }
229 if (get_follow_mode(ref) != make_a_copy) {
230 return false;
231 }
232 if (ref->msotype() == MetaspaceObj::ClassType) {
233 Klass* klass = (Klass*)ref->obj();
234 assert(klass->is_klass(), "must be");
235 if (!is_excluded(klass)) {
236 _klasses->append(klass);
237 if (klass->is_hidden() && klass->is_instance_klass()) {
238 update_hidden_class_loader_type(InstanceKlass::cast(klass));
239 }
240 }
241 // See RunTimeClassInfo::get_for()
242 _estimated_metaspaceobj_bytes += align_up(BytesPerWord, 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 #if INCLUDE_CDS_JAVA_HEAP
301
302 void ArchiveBuilder::update_hidden_class_loader_type(InstanceKlass* ik) {
303 s2 classloader_type;
304 if (HeapShared::is_lambda_form_klass(ik)) {
305 assert(CDSConfig::is_dumping_invokedynamic(), "lambda form classes are archived only if CDSConfig::is_dumping_invokedynamic() is true");
306 classloader_type = ClassLoader::BOOT_LOADER;
307 } else if (SystemDictionaryShared::should_hidden_class_be_archived(ik)) {
308 oop loader = ik->class_loader();
309
310 if (loader == nullptr) {
311 classloader_type = ClassLoader::BOOT_LOADER;
312 } else if (SystemDictionary::is_platform_class_loader(loader)) {
313 classloader_type = ClassLoader::PLATFORM_LOADER;
314 } else if (SystemDictionary::is_system_class_loader(loader)) {
315 classloader_type = ClassLoader::APP_LOADER;
316 } else {
317 ShouldNotReachHere();
318 }
319 } else {
320 ShouldNotReachHere();
321 }
322
323 ik->set_shared_class_loader_type(classloader_type);
324 if (HeapShared::is_lambda_proxy_klass(ik)) {
325 InstanceKlass* nest_host = ik->nest_host_not_null();
326 ik->set_shared_classpath_index(nest_host->shared_classpath_index());
327 } else if (!HeapShared::is_lambda_form_klass(ik)) {
328 // Injected invoker classes: fake this for now. Probably not needed!
329 if (classloader_type == ClassLoader::APP_LOADER) {
330 ik->set_shared_classpath_index(ClassLoaderExt::app_class_paths_start_index()); // HACK
331 } else {
332 ik->set_shared_classpath_index(0);
333 }
334 }
335 }
336
337 #endif //INCLUDE_CDS_JAVA_HEAP
338
339 int ArchiveBuilder::compare_symbols_by_address(Symbol** a, Symbol** b) {
340 if (a[0] < b[0]) {
341 return -1;
342 } else {
343 assert(a[0] > b[0], "Duplicated symbol %s unexpected", (*a)->as_C_string());
344 return 1;
345 }
346 }
347
348 int ArchiveBuilder::compare_klass_by_name(Klass** a, Klass** b) {
349 return a[0]->name()->fast_compare(b[0]->name());
350 }
351
352 void ArchiveBuilder::sort_klasses() {
353 log_info(cds)("Sorting classes ... ");
354 _klasses->sort(compare_klass_by_name);
355 }
356
357 size_t ArchiveBuilder::estimate_archive_size() {
358 // size of the symbol table and two dictionaries, plus the RunTimeClassInfo's
359 size_t symbol_table_est = SymbolTable::estimate_size_for_archive();
360 size_t dictionary_est = SystemDictionaryShared::estimate_size_for_archive();
361 size_t training_data_est = TrainingData::estimate_size_for_archive();
362 _estimated_hashtable_bytes = symbol_table_est + dictionary_est + training_data_est;
363
364 if (CDSConfig::is_dumping_aot_linked_classes()) {
365 _estimated_hashtable_bytes += _klasses->length() * 16 * sizeof(Klass*);
366 }
367
368 if (CDSConfig::is_dumping_final_static_archive()) {
369 _estimated_hashtable_bytes += 200 * 1024 * 1024; // FIXME -- need to iterate archived symbols??
370 }
371
372 if (CDSConfig::is_dumping_dynamic_archive()) {
373 // Some extra space for traning data. Be generous. Unused areas will be trimmed from the archive file.
374 _estimated_hashtable_bytes += 200 * 1024 * 1024;
375 }
376 size_t total = 0;
377
378 total += _estimated_metaspaceobj_bytes;
379 total += _estimated_hashtable_bytes;
380
381 // allow fragmentation at the end of each dump region
382 total += _total_dump_regions * MetaspaceShared::core_region_alignment();
383
384 log_info(cds)("_estimated_hashtable_bytes = " SIZE_FORMAT " + " SIZE_FORMAT " = " SIZE_FORMAT,
385 symbol_table_est, dictionary_est, _estimated_hashtable_bytes);
386 log_info(cds)("_estimated_metaspaceobj_bytes = " SIZE_FORMAT, _estimated_metaspaceobj_bytes);
387 log_info(cds)("total estimate bytes = " SIZE_FORMAT, total);
388
389 return align_up(total, MetaspaceShared::core_region_alignment());
390 }
391
392 address ArchiveBuilder::reserve_buffer() {
393 size_t buffer_size = estimate_archive_size();
394 ReservedSpace rs(buffer_size, MetaspaceShared::core_region_alignment(), os::vm_page_size());
395 if (!rs.is_reserved()) {
396 log_error(cds)("Failed to reserve " SIZE_FORMAT " bytes of output buffer.", buffer_size);
397 MetaspaceShared::unrecoverable_writing_error();
398 }
399
400 // buffer_bottom is the lowest address of the 2 core regions (rw, ro) when
401 // we are copying the class metadata into the buffer.
402 address buffer_bottom = (address)rs.base();
403 log_info(cds)("Reserved output buffer space at " PTR_FORMAT " [" SIZE_FORMAT " bytes]",
404 p2i(buffer_bottom), buffer_size);
405 _shared_rs = rs;
406
407 _buffer_bottom = buffer_bottom;
408 _last_verified_top = buffer_bottom;
409 _current_dump_region = &_rw_region;
410 _num_dump_regions_used = 1;
411 _other_region_used_bytes = 0;
412 _current_dump_region->init(&_shared_rs, &_shared_vs);
413
414 ArchivePtrMarker::initialize(&_ptrmap, &_shared_vs);
415
416 // The bottom of the static archive should be mapped at this address by default.
417 _requested_static_archive_bottom = (address)MetaspaceShared::requested_base_address();
418
419 // The bottom of the archive (that I am writing now) should be mapped at this address by default.
420 address my_archive_requested_bottom;
421
422 if (CDSConfig::is_dumping_static_archive()) {
423 my_archive_requested_bottom = _requested_static_archive_bottom;
424 } else {
425 _mapped_static_archive_bottom = (address)MetaspaceObj::shared_metaspace_base();
426 _mapped_static_archive_top = (address)MetaspaceObj::shared_metaspace_top();
427 assert(_mapped_static_archive_top >= _mapped_static_archive_bottom, "must be");
428 size_t static_archive_size = _mapped_static_archive_top - _mapped_static_archive_bottom;
429
430 // At run time, we will mmap the dynamic archive at my_archive_requested_bottom
431 _requested_static_archive_top = _requested_static_archive_bottom + static_archive_size;
432 my_archive_requested_bottom = align_up(_requested_static_archive_top, MetaspaceShared::core_region_alignment());
433
434 _requested_dynamic_archive_bottom = my_archive_requested_bottom;
435 }
436
437 _buffer_to_requested_delta = my_archive_requested_bottom - _buffer_bottom;
438
439 address my_archive_requested_top = my_archive_requested_bottom + buffer_size;
440 if (my_archive_requested_bottom < _requested_static_archive_bottom ||
441 my_archive_requested_top <= _requested_static_archive_bottom) {
442 // Size overflow.
443 log_error(cds)("my_archive_requested_bottom = " INTPTR_FORMAT, p2i(my_archive_requested_bottom));
444 log_error(cds)("my_archive_requested_top = " INTPTR_FORMAT, p2i(my_archive_requested_top));
445 log_error(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is too high. "
446 "Please rerun java -Xshare:dump with a lower value", p2i(_requested_static_archive_bottom));
447 MetaspaceShared::unrecoverable_writing_error();
448 }
449
450 if (CDSConfig::is_dumping_static_archive()) {
451 // We don't want any valid object to be at the very bottom of the archive.
452 // See ArchivePtrMarker::mark_pointer().
453 rw_region()->allocate(16);
454 }
455
456 return buffer_bottom;
457 }
458
459 void ArchiveBuilder::iterate_sorted_roots(MetaspaceClosure* it) {
460 int num_symbols = _symbols->length();
461 for (int i = 0; i < num_symbols; i++) {
462 it->push(_symbols->adr_at(i));
463 }
464
465 int num_klasses = _klasses->length();
466 for (int i = 0; i < num_klasses; i++) {
467 it->push(_klasses->adr_at(i));
468 }
469
470 iterate_roots(it);
471 }
472
473 class GatherSortedSourceObjs : public MetaspaceClosure {
474 ArchiveBuilder* _builder;
475
476 public:
477 GatherSortedSourceObjs(ArchiveBuilder* builder) : _builder(builder) {}
478
479 virtual bool do_ref(Ref* ref, bool read_only) {
480 return _builder->gather_one_source_obj(ref, read_only);
481 }
482 };
483
484 bool ArchiveBuilder::gather_one_source_obj(MetaspaceClosure::Ref* ref, bool read_only) {
485 address src_obj = ref->obj();
486 if (src_obj == nullptr) {
487 return false;
488 }
489
490 remember_embedded_pointer_in_enclosing_obj(ref);
491 if (RegeneratedClasses::has_been_regenerated(src_obj)) {
492 // No need to copy it. We will later relocate it to point to the regenerated klass/method.
493 return false;
494 }
495
496 FollowMode follow_mode = get_follow_mode(ref);
497 SourceObjInfo src_info(ref, read_only, follow_mode);
498 bool created;
499 SourceObjInfo* p = _src_obj_table.put_if_absent(src_obj, src_info, &created);
500 if (created) {
501 if (_src_obj_table.maybe_grow()) {
502 log_info(cds, hashtables)("Expanded _src_obj_table table to %d", _src_obj_table.table_size());
503 }
504 }
505
506 #ifdef ASSERT
507 if (ref->msotype() == MetaspaceObj::MethodType) {
508 Method* m = (Method*)ref->obj();
509 assert(!RegeneratedClasses::has_been_regenerated((address)m->method_holder()),
510 "Should not archive methods in a class that has been regenerated");
511 }
512 #endif
513
514 assert(p->read_only() == src_info.read_only(), "must be");
515
516 if (created && src_info.should_copy()) {
517 if (read_only) {
518 _ro_src_objs.append(p);
519 } else {
520 _rw_src_objs.append(p);
521 }
522 return true; // Need to recurse into this ref only if we are copying it
523 } else {
524 return false;
525 }
526 }
527
528 void ArchiveBuilder::record_regenerated_object(address orig_src_obj, address regen_src_obj) {
529 // Record the fact that orig_src_obj has been replaced by regen_src_obj. All calls to get_buffered_addr(orig_src_obj)
530 // should return the same value as get_buffered_addr(regen_src_obj).
531 SourceObjInfo* p = _src_obj_table.get(regen_src_obj);
532 assert(p != nullptr, "regenerated object should always be dumped");
533 SourceObjInfo orig_src_info(orig_src_obj, p);
534 bool created;
535 _src_obj_table.put_if_absent(orig_src_obj, orig_src_info, &created);
536 assert(created, "We shouldn't have archived the original copy of a regenerated object");
537 }
538
539 // Remember that we have a pointer inside ref->enclosing_obj() that points to ref->obj()
540 void ArchiveBuilder::remember_embedded_pointer_in_enclosing_obj(MetaspaceClosure::Ref* ref) {
541 assert(ref->obj() != nullptr, "should have checked");
542
543 address enclosing_obj = ref->enclosing_obj();
544 if (enclosing_obj == nullptr) {
545 return;
546 }
547
548 // We are dealing with 3 addresses:
549 // address o = ref->obj(): We have found an object whose address is o.
550 // address* mpp = ref->mpp(): The object o is pointed to by a pointer whose address is mpp.
551 // I.e., (*mpp == o)
552 // enclosing_obj : If non-null, it is the object which has a field that points to o.
553 // mpp is the address if that field.
554 //
555 // Example: We have an array whose first element points to a Method:
556 // Method* o = 0x0000abcd;
557 // Array<Method*>* enclosing_obj = 0x00001000;
558 // enclosing_obj->at_put(0, o);
559 //
560 // We the MetaspaceClosure iterates on the very first element of this array, we have
561 // ref->obj() == 0x0000abcd (the Method)
562 // ref->mpp() == 0x00001008 (the location of the first element in the array)
563 // ref->enclosing_obj() == 0x00001000 (the Array that contains the Method)
564 //
565 // We use the above information to mark the bitmap to indicate that there's a pointer on address 0x00001008.
566 SourceObjInfo* src_info = _src_obj_table.get(enclosing_obj);
567 if (src_info == nullptr || !src_info->should_copy()) {
568 // source objects of point_to_it/set_to_null types are not copied
569 // so we don't need to remember their pointers.
570 } else {
571 if (src_info->read_only()) {
572 _ro_src_objs.remember_embedded_pointer(src_info, ref);
573 } else {
574 _rw_src_objs.remember_embedded_pointer(src_info, ref);
575 }
576 }
577 }
578
579 void ArchiveBuilder::gather_source_objs() {
580 ResourceMark rm;
581 log_info(cds)("Gathering all archivable objects ... ");
582 gather_klasses_and_symbols();
583 GatherSortedSourceObjs doit(this);
584 iterate_sorted_roots(&doit);
585 doit.finish();
586 }
587
588 bool ArchiveBuilder::is_excluded(Klass* klass) {
589 if (klass->is_instance_klass()) {
590 InstanceKlass* ik = InstanceKlass::cast(klass);
591 return SystemDictionaryShared::is_excluded_class(ik);
592 } else if (klass->is_objArray_klass()) {
593 Klass* bottom = ObjArrayKlass::cast(klass)->bottom_klass();
594 if (CDSConfig::is_dumping_dynamic_archive() && MetaspaceShared::is_shared_static(bottom)) {
595 // The bottom class is in the static archive so it's clearly not excluded.
596 assert(CDSConfig::is_dumping_dynamic_archive(), "sanity");
597 return false;
598 } else if (bottom->is_instance_klass()) {
599 return SystemDictionaryShared::is_excluded_class(InstanceKlass::cast(bottom));
600 }
601 }
602
603 return false;
604 }
605
606 ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref *ref) {
607 address obj = ref->obj();
608 if (CDSConfig::is_dumping_dynamic_archive() && MetaspaceShared::is_in_shared_metaspace(obj)) {
609 // Don't dump existing shared metadata again.
610 return point_to_it;
611 } else if (ref->msotype() == MetaspaceObj::MethodDataType ||
612 ref->msotype() == MetaspaceObj::MethodCountersType ||
613 ref->msotype() == MetaspaceObj::KlassTrainingDataType ||
614 ref->msotype() == MetaspaceObj::MethodTrainingDataType ||
615 ref->msotype() == MetaspaceObj::CompileTrainingDataType) {
616 return TrainingData::need_data() ? make_a_copy : set_to_null;
617 } else {
618 if (ref->msotype() == MetaspaceObj::ClassType) {
619 Klass* klass = (Klass*)ref->obj();
620 assert(klass->is_klass(), "must be");
621 if (is_excluded(klass)) {
622 ResourceMark rm;
623 log_debug(cds, dynamic)("Skipping class (excluded): %s", klass->external_name());
624 return set_to_null;
625 }
626 }
627
628 return make_a_copy;
629 }
630 }
631
632 void ArchiveBuilder::start_dump_region(DumpRegion* next) {
633 address bottom = _last_verified_top;
634 address top = (address)(current_dump_region()->top());
635 _other_region_used_bytes += size_t(top - bottom);
636
637 current_dump_region()->pack(next);
638 _current_dump_region = next;
639 _num_dump_regions_used ++;
640
641 _last_verified_top = (address)(current_dump_region()->top());
642 }
643
644 void ArchiveBuilder::verify_estimate_size(size_t estimate, const char* which) {
645 address bottom = _last_verified_top;
646 address top = (address)(current_dump_region()->top());
647 size_t used = size_t(top - bottom) + _other_region_used_bytes;
648 int diff = int(estimate) - int(used);
649
650 log_info(cds)("%s estimate = " SIZE_FORMAT " used = " SIZE_FORMAT "; diff = %d bytes", which, estimate, used, diff);
651 assert(diff >= 0, "Estimate is too small");
652
653 _last_verified_top = top;
654 _other_region_used_bytes = 0;
655 }
656
657 char* ArchiveBuilder::ro_strdup(const char* s) {
658 char* archived_str = ro_region_alloc((int)strlen(s) + 1);
659 strcpy(archived_str, s);
660 return archived_str;
661 }
662
663 // The objects that have embedded pointers will sink
664 // towards the end of the list. This ensures we have a maximum
665 // number of leading zero bits in the relocation bitmap.
666 int ArchiveBuilder::compare_src_objs(SourceObjInfo** a, SourceObjInfo** b) {
667 if ((*a)->has_embedded_pointer() && !(*b)->has_embedded_pointer()) {
668 return 1;
669 } else if (!(*a)->has_embedded_pointer() && (*b)->has_embedded_pointer()) {
670 return -1;
671 } else {
672 // This is necessary to keep the sorting order stable. Otherwise the
673 // archive's contents may not be deterministic.
674 return (*a)->id() - (*b)->id();
675 }
676 }
677
678 void ArchiveBuilder::sort_metadata_objs() {
679 _rw_src_objs.objs()->sort(compare_src_objs);
680 _ro_src_objs.objs()->sort(compare_src_objs);
681 }
682
683 void ArchiveBuilder::dump_rw_metadata() {
684 ResourceMark rm;
685 log_info(cds)("Allocating RW objects ... ");
686 make_shallow_copies(&_rw_region, &_rw_src_objs);
687
688 #if INCLUDE_CDS_JAVA_HEAP
689 if (CDSConfig::is_dumping_full_module_graph()) {
690 // Archive the ModuleEntry's and PackageEntry's of the 3 built-in loaders
691 char* start = rw_region()->top();
692 ClassLoaderDataShared::allocate_archived_tables();
693 alloc_stats()->record_modules(rw_region()->top() - start, /*read_only*/false);
694 }
695 #endif
696 }
697
698 void ArchiveBuilder::dump_ro_metadata() {
699 ResourceMark rm;
700 log_info(cds)("Allocating RO objects ... ");
701
702 start_dump_region(&_ro_region);
703 make_shallow_copies(&_ro_region, &_ro_src_objs);
704
705 #if INCLUDE_CDS_JAVA_HEAP
706 if (CDSConfig::is_dumping_full_module_graph()) {
707 char* start = ro_region()->top();
708 ClassLoaderDataShared::init_archived_tables();
709 alloc_stats()->record_modules(ro_region()->top() - start, /*read_only*/true);
710 }
711 #endif
712
713 RegeneratedClasses::record_regenerated_objects();
714 }
715
716 void ArchiveBuilder::make_shallow_copies(DumpRegion *dump_region,
717 const ArchiveBuilder::SourceObjList* src_objs) {
718 for (int i = 0; i < src_objs->objs()->length(); i++) {
719 make_shallow_copy(dump_region, src_objs->objs()->at(i));
720 }
721 log_info(cds)("done (%d objects)", src_objs->objs()->length());
722 }
723
724 void ArchiveBuilder::make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info) {
725 address src = src_info->source_addr();
726 int bytes = src_info->size_in_bytes();
727 char* dest;
728 char* oldtop;
729 char* newtop;
730
731 oldtop = dump_region->top();
732 if (src_info->msotype() == MetaspaceObj::ClassType) {
733 // Save a pointer immediate in front of an InstanceKlass, so
734 // we can do a quick lookup from InstanceKlass* -> RunTimeClassInfo*
735 // without building another hashtable. See RunTimeClassInfo::get_for()
736 // in systemDictionaryShared.cpp.
737 Klass* klass = (Klass*)src;
738 if (klass->is_instance_klass()) {
739 SystemDictionaryShared::validate_before_archiving(InstanceKlass::cast(klass));
740 dump_region->allocate(sizeof(address));
741 }
742 }
743 dest = dump_region->allocate(bytes);
744 newtop = dump_region->top();
745
746 memcpy(dest, src, bytes);
747
748 // Update the hash of buffered sorted symbols for static dump so that the symbols have deterministic contents
749 if (CDSConfig::is_dumping_static_archive() && (src_info->msotype() == MetaspaceObj::SymbolType)) {
750 Symbol* buffered_symbol = (Symbol*)dest;
751 assert(((Symbol*)src)->is_permanent(), "archived symbols must be permanent");
752 buffered_symbol->update_identity_hash();
753 }
754
755 {
756 bool created;
757 _buffered_to_src_table.put_if_absent((address)dest, src, &created);
758 assert(created, "must be");
759 if (_buffered_to_src_table.maybe_grow()) {
760 log_info(cds, hashtables)("Expanded _buffered_to_src_table table to %d", _buffered_to_src_table.table_size());
761 }
762 }
763
764 intptr_t* archived_vtable = CppVtables::get_archived_vtable(src_info->msotype(), (address)dest);
765 if (archived_vtable != nullptr) {
766 *(address*)dest = (address)archived_vtable;
767 ArchivePtrMarker::mark_pointer((address*)dest);
768 }
769
770 log_trace(cds)("Copy: " PTR_FORMAT " ==> " PTR_FORMAT " %d", p2i(src), p2i(dest), bytes);
771 src_info->set_buffered_addr((address)dest);
772
773 _alloc_stats.record(src_info->msotype(), int(newtop - oldtop), src_info->read_only());
774 }
775
776 // This is used by code that hand-assembles data structures, such as the LambdaProxyClassKey, that are
777 // not handled by MetaspaceClosure.
778 void ArchiveBuilder::write_pointer_in_buffer(address* ptr_location, address src_addr) {
779 assert(is_in_buffer_space(ptr_location), "must be");
780 if (src_addr == nullptr) {
781 *ptr_location = nullptr;
782 ArchivePtrMarker::clear_pointer(ptr_location);
783 } else {
784 *ptr_location = get_buffered_addr(src_addr);
785 ArchivePtrMarker::mark_pointer(ptr_location);
786 }
787 }
788
789 void ArchiveBuilder::mark_and_relocate_to_buffered_addr(address* ptr_location) {
790 assert(*ptr_location != nullptr, "sanity");
791 if (!is_in_mapped_static_archive(*ptr_location)) {
792 *ptr_location = get_buffered_addr(*ptr_location);
793 }
794 ArchivePtrMarker::mark_pointer(ptr_location);
795 }
796
797 address ArchiveBuilder::get_buffered_addr(address src_addr) const {
798 SourceObjInfo* p = _src_obj_table.get(src_addr);
799 assert(p != nullptr, "src_addr " INTPTR_FORMAT " is used but has not been archived",
800 p2i(src_addr));
801
802 return p->buffered_addr();
803 }
804
805 bool ArchiveBuilder::has_been_archived(address src_addr) const {
806 SourceObjInfo* p = _src_obj_table.get(src_addr);
807 return (p != nullptr);
808 }
809
810 address ArchiveBuilder::get_source_addr(address buffered_addr) const {
811 assert(is_in_buffer_space(buffered_addr), "must be");
812 address* src_p = _buffered_to_src_table.get(buffered_addr);
813 assert(src_p != nullptr && *src_p != nullptr, "must be");
814 return *src_p;
815 }
816
817 void ArchiveBuilder::relocate_embedded_pointers(ArchiveBuilder::SourceObjList* src_objs) {
818 for (int i = 0; i < src_objs->objs()->length(); i++) {
819 src_objs->relocate(i, this);
820 }
821 }
822
823 void ArchiveBuilder::relocate_metaspaceobj_embedded_pointers() {
824 log_info(cds)("Relocating embedded pointers in core regions ... ");
825 relocate_embedded_pointers(&_rw_src_objs);
826 relocate_embedded_pointers(&_ro_src_objs);
827 }
828
829 #define ADD_COUNT(x) \
830 x += 1; \
831 x ## _a += aotlinked; \
832 x ## _i += inited;
833
834 #define DECLARE_INSTANCE_KLASS_COUNTER(x) \
835 int x = 0; \
836 int x ## _a = 0; \
837 int x ## _i = 0;
838
839 void ArchiveBuilder::make_klasses_shareable() {
840 DECLARE_INSTANCE_KLASS_COUNTER(num_instance_klasses);
841 DECLARE_INSTANCE_KLASS_COUNTER(num_boot_klasses);
842 DECLARE_INSTANCE_KLASS_COUNTER(num_vm_klasses);
843 DECLARE_INSTANCE_KLASS_COUNTER(num_platform_klasses);
844 DECLARE_INSTANCE_KLASS_COUNTER(num_app_klasses);
845 DECLARE_INSTANCE_KLASS_COUNTER(num_hidden_klasses);
846 DECLARE_INSTANCE_KLASS_COUNTER(num_unlinked_klasses);
847 DECLARE_INSTANCE_KLASS_COUNTER(num_unregistered_klasses);
848 int num_obj_array_klasses = 0;
849 int num_type_array_klasses = 0;
850
851 int boot_unlinked = 0;
852 int platform_unlinked = 0;
853 int app_unlinked = 0;
854 int unreg_unlinked = 0;
855
856 for (int i = 0; i < klasses()->length(); i++) {
857 // Some of the code in ConstantPool::remove_unshareable_info() requires the classes
858 // to be in linked state, so it must be call here before the next loop, which returns
859 // all classes to unlinked state.
860 Klass* k = get_buffered_addr(klasses()->at(i));
861 if (k->is_instance_klass()) {
862 InstanceKlass::cast(k)->constants()->remove_unshareable_info();
863 }
864 }
865
866 for (int i = 0; i < klasses()->length(); i++) {
867 const char* type;
868 const char* unlinked = "";
869 const char* kind = "";
870 const char* hidden = "";
871 const char* generated = "";
872 const char* aotlinked_msg = "";
873 const char* inited_msg = "";
874 Klass* k = get_buffered_addr(klasses()->at(i));
875 k->remove_java_mirror();
876 if (k->is_objArray_klass()) {
877 // InstanceKlass and TypeArrayKlass will in turn call remove_unshareable_info
878 // on their array classes.
879 num_obj_array_klasses ++;
880 type = "array";
881 } else if (k->is_typeArray_klass()) {
882 num_type_array_klasses ++;
883 type = "array";
884 k->remove_unshareable_info();
885 } else {
886 assert(k->is_instance_klass(), " must be");
887 InstanceKlass* ik = InstanceKlass::cast(k);
888 InstanceKlass* src_ik = get_source_addr(ik);
889 int aotlinked = AOTClassLinker::is_candidate(src_ik);
890 int inited = ik->has_preinitialized_mirror();
891 ADD_COUNT(num_instance_klasses);
892 if (CDSConfig::is_dumping_dynamic_archive()) {
893 // For static dump, class loader type are already set.
894 ik->assign_class_loader_type();
895 }
896 if (ik->is_hidden()) {
897 oop loader = k->class_loader();
898 if (loader == nullptr) {
899 type = "boot";
900 ADD_COUNT(num_boot_klasses);
901 } else if (loader == SystemDictionary::java_platform_loader()) {
902 type = "plat";
903 ADD_COUNT(num_platform_klasses);
904 } else if (loader == SystemDictionary::java_system_loader()) {
905 type = "app";
906 ADD_COUNT(num_app_klasses);
907 } else {
908 type = "bad";
909 assert(0, "shouldn't happen");
910 }
911 } else if (ik->is_shared_boot_class()) {
912 type = "boot";
913 ADD_COUNT(num_boot_klasses);
914 } else if (ik->is_shared_platform_class()) {
915 type = "plat";
916 ADD_COUNT(num_platform_klasses);
917 } else if (ik->is_shared_app_class()) {
918 type = "app";
919 ADD_COUNT(num_app_klasses);
920 } else {
921 assert(ik->is_shared_unregistered_class(), "must be");
922 type = "unreg";
923 ADD_COUNT(num_unregistered_klasses);
924 }
925
926 if (AOTClassLinker::is_vm_class(src_ik)) {
927 ADD_COUNT(num_vm_klasses);
928 }
929
930 if (!ik->is_linked()) {
931 ADD_COUNT(num_unlinked_klasses);
932 unlinked = " unlinked";
933 if (ik->is_shared_boot_class()) {
934 boot_unlinked ++;
935 } else if (ik->is_shared_platform_class()) {
936 platform_unlinked ++;
937 } else if (ik->is_shared_app_class()) {
938 app_unlinked ++;
939 } else {
940 unreg_unlinked ++;
941 }
942 }
943
944 if (ik->is_interface()) {
945 kind = " interface";
946 } else if (src_ik->java_super() == vmClasses::Enum_klass()) {
947 kind = " enum";
948 }
949
950 if (ik->is_hidden()) {
951 ADD_COUNT(num_hidden_klasses);
952 hidden = " hidden";
953 }
954
955 if (ik->is_generated_shared_class()) {
956 generated = " generated";
957 }
958 if (aotlinked) {
959 aotlinked_msg = " aot-linked";
960 }
961 if (inited) {
962 inited_msg = " inited";
963 }
964
965 MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread::current(), ik);
966 ik->remove_unshareable_info();
967 }
968
969 if (log_is_enabled(Debug, cds, class)) {
970 ResourceMark rm;
971 log_debug(cds, class)("klasses[%5d] = " PTR_FORMAT " %-5s %s%s%s%s%s%s%s", i,
972 p2i(to_requested(k)), type, k->external_name(),
973 kind, hidden, unlinked, generated, aotlinked_msg, inited_msg);
974 }
975 }
976
977 #define STATS_FORMAT "= %5d, aot-linked = %5d, inited = %5d"
978 #define STATS_PARAMS(x) num_ ## x, num_ ## x ## _a, num_ ## x ## _i
979
980 log_info(cds)("Number of classes %d", num_instance_klasses + num_obj_array_klasses + num_type_array_klasses);
981 log_info(cds)(" instance classes " STATS_FORMAT, STATS_PARAMS(instance_klasses));
982 log_info(cds)(" boot " STATS_FORMAT, STATS_PARAMS(boot_klasses));
983 log_info(cds)(" vm " STATS_FORMAT, STATS_PARAMS(vm_klasses));
984 log_info(cds)(" platform " STATS_FORMAT, STATS_PARAMS(platform_klasses));
985 log_info(cds)(" app " STATS_FORMAT, STATS_PARAMS(app_klasses));
986 log_info(cds)(" unregistered " STATS_FORMAT, STATS_PARAMS(unregistered_klasses));
987 log_info(cds)(" (hidden) " STATS_FORMAT, STATS_PARAMS(hidden_klasses));
988 log_info(cds)(" (unlinked) " STATS_FORMAT ", boot = %d, plat = %d, app = %d, unreg = %d",
989 STATS_PARAMS(unlinked_klasses),
990 boot_unlinked, platform_unlinked,
991 app_unlinked, unreg_unlinked);
992 log_info(cds)(" obj array classes = %5d", num_obj_array_klasses);
993 log_info(cds)(" type array classes = %5d", num_type_array_klasses);
994 log_info(cds)(" symbols = %5d", _symbols->length());
995
996 #undef STATS_FORMAT
997 #undef STATS_PARAMS
998
999 DynamicArchive::make_array_klasses_shareable();
1000 }
1001
1002 void ArchiveBuilder::make_training_data_shareable() {
1003 auto clean_td = [&] (address& src_obj, SourceObjInfo& info) {
1004 if (!is_in_buffer_space(info.buffered_addr())) {
1005 return;
1006 }
1007
1008 if (info.msotype() == MetaspaceObj::KlassTrainingDataType ||
1009 info.msotype() == MetaspaceObj::MethodTrainingDataType ||
1010 info.msotype() == MetaspaceObj::CompileTrainingDataType) {
1011 TrainingData* buffered_td = (TrainingData*)info.buffered_addr();
1012 buffered_td->remove_unshareable_info();
1013 } else if (info.msotype() == MetaspaceObj::MethodDataType) {
1014 MethodData* buffered_mdo = (MethodData*)info.buffered_addr();
1015 buffered_mdo->remove_unshareable_info();
1016 } else if (info.msotype() == MetaspaceObj::MethodCountersType) {
1017 MethodCounters* buffered_mc = (MethodCounters*)info.buffered_addr();
1018 buffered_mc->remove_unshareable_info();
1019 }
1020 };
1021 _src_obj_table.iterate_all(clean_td);
1022 }
1023
1024 void ArchiveBuilder::serialize_dynamic_archivable_items(SerializeClosure* soc) {
1025 SymbolTable::serialize_shared_table_header(soc, false);
1026 SystemDictionaryShared::serialize_dictionary_headers(soc, false);
1027 DynamicArchive::serialize_array_klasses(soc);
1028 AOTLinkedClassBulkLoader::serialize(soc, false);
1029 FinalImageRecipes::serialize(soc, false);
1030 TrainingData::serialize_training_data(soc);
1031 }
1032
1033 uintx ArchiveBuilder::buffer_to_offset(address p) const {
1034 address requested_p = to_requested(p);
1035 assert(requested_p >= _requested_static_archive_bottom, "must be");
1036 return requested_p - _requested_static_archive_bottom;
1037 }
1038
1039 uintx ArchiveBuilder::any_to_offset(address p) const {
1040 if (is_in_mapped_static_archive(p)) {
1041 assert(CDSConfig::is_dumping_dynamic_archive(), "must be");
1042 return p - _mapped_static_archive_bottom;
1043 }
1044 if (!is_in_buffer_space(p)) {
1045 // p must be a "source" address
1046 p = get_buffered_addr(p);
1047 }
1048 return buffer_to_offset(p);
1049 }
1050
1051 void ArchiveBuilder::start_cc_region() {
1052 ro_region()->pack();
1053 start_dump_region(&_cc_region);
1054 }
1055
1056 void ArchiveBuilder::end_cc_region() {
1057 _cc_region.pack();
1058 }
1059
1060 #if INCLUDE_CDS_JAVA_HEAP
1061 narrowKlass ArchiveBuilder::get_requested_narrow_klass(Klass* k) {
1062 assert(CDSConfig::is_dumping_heap(), "sanity");
1063 k = get_buffered_klass(k);
1064 Klass* requested_k = to_requested(k);
1065 address narrow_klass_base = _requested_static_archive_bottom; // runtime encoding base == runtime mapping start
1066 const int narrow_klass_shift = ArchiveHeapWriter::precomputed_narrow_klass_shift;
1067 return CompressedKlassPointers::encode_not_null(requested_k, narrow_klass_base, narrow_klass_shift);
1068 }
1069 #endif // INCLUDE_CDS_JAVA_HEAP
1070
1071 // RelocateBufferToRequested --- Relocate all the pointers in rw/ro,
1072 // so that the archive can be mapped to the "requested" location without runtime relocation.
1073 //
1074 // - See ArchiveBuilder header for the definition of "buffer", "mapped" and "requested"
1075 // - ArchivePtrMarker::ptrmap() marks all the pointers in the rw/ro regions
1076 // - Every pointer must have one of the following values:
1077 // [a] nullptr:
1078 // No relocation is needed. Remove this pointer from ptrmap so we don't need to
1079 // consider it at runtime.
1080 // [b] Points into an object X which is inside the buffer:
1081 // Adjust this pointer by _buffer_to_requested_delta, so it points to X
1082 // when the archive is mapped at the requested location.
1083 // [c] Points into an object Y which is inside mapped static archive:
1084 // - This happens only during dynamic dump
1085 // - Adjust this pointer by _mapped_to_requested_static_archive_delta,
1086 // so it points to Y when the static archive is mapped at the requested location.
1087 template <bool STATIC_DUMP>
1088 class RelocateBufferToRequested : public BitMapClosure {
1089 ArchiveBuilder* _builder;
1090 address _buffer_bottom;
1091 intx _buffer_to_requested_delta;
1092 intx _mapped_to_requested_static_archive_delta;
1093 size_t _max_non_null_offset;
1094
1095 public:
1096 RelocateBufferToRequested(ArchiveBuilder* builder) {
1097 _builder = builder;
1098 _buffer_bottom = _builder->buffer_bottom();
1099 _buffer_to_requested_delta = builder->buffer_to_requested_delta();
1100 _mapped_to_requested_static_archive_delta = builder->requested_static_archive_bottom() - builder->mapped_static_archive_bottom();
1101 _max_non_null_offset = 0;
1102
1103 address bottom = _builder->buffer_bottom();
1104 address top = _builder->buffer_top();
1105 address new_bottom = bottom + _buffer_to_requested_delta;
1106 address new_top = top + _buffer_to_requested_delta;
1107 log_debug(cds)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT "] to "
1108 "[" INTPTR_FORMAT " - " INTPTR_FORMAT "]",
1109 p2i(bottom), p2i(top),
1110 p2i(new_bottom), p2i(new_top));
1111 }
1112
1113 bool do_bit(size_t offset) {
1114 address* p = (address*)_buffer_bottom + offset;
1115 assert(_builder->is_in_buffer_space(p), "pointer must live in buffer space");
1116
1117 if (*p == nullptr) {
1118 // todo -- clear bit, etc
1119 ArchivePtrMarker::ptrmap()->clear_bit(offset);
1120 } else {
1121 if (STATIC_DUMP) {
1122 assert(_builder->is_in_buffer_space(*p), "old pointer must point inside buffer space");
1123 *p += _buffer_to_requested_delta;
1124 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive");
1125 } else {
1126 if (_builder->is_in_buffer_space(*p)) {
1127 *p += _buffer_to_requested_delta;
1128 // assert is in requested dynamic archive
1129 } else {
1130 assert(_builder->is_in_mapped_static_archive(*p), "old pointer must point inside buffer space or mapped static archive");
1131 *p += _mapped_to_requested_static_archive_delta;
1132 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive");
1133 }
1134 }
1135 _max_non_null_offset = offset;
1136 }
1137
1138 return true; // keep iterating
1139 }
1140
1141 void doit() {
1142 ArchivePtrMarker::ptrmap()->iterate(this);
1143 ArchivePtrMarker::compact(_max_non_null_offset);
1144 }
1145 };
1146
1147
1148 void ArchiveBuilder::relocate_to_requested() {
1149 if (!ro_region()->is_packed()) {
1150 ro_region()->pack();
1151 }
1152
1153 size_t my_archive_size = buffer_top() - buffer_bottom();
1154
1155 if (CDSConfig::is_dumping_static_archive()) {
1156 _requested_static_archive_top = _requested_static_archive_bottom + my_archive_size;
1157 RelocateBufferToRequested<true> patcher(this);
1158 patcher.doit();
1159 } else {
1160 assert(CDSConfig::is_dumping_dynamic_archive(), "must be");
1161 _requested_dynamic_archive_top = _requested_dynamic_archive_bottom + my_archive_size;
1162 RelocateBufferToRequested<false> patcher(this);
1163 patcher.doit();
1164 }
1165 }
1166
1167 // Write detailed info to a mapfile to analyze contents of the archive.
1168 // static dump:
1169 // java -Xshare:dump -Xlog:cds+map=trace:file=cds.map:none:filesize=0
1170 // dynamic dump:
1171 // java -cp MyApp.jar -XX:ArchiveClassesAtExit=MyApp.jsa \
1172 // -Xlog:cds+map=trace:file=cds.map:none:filesize=0 MyApp
1173 //
1174 // We need to do some address translation because the buffers used at dump time may be mapped to
1175 // a different location at runtime. At dump time, the buffers may be at arbitrary locations
1176 // picked by the OS. At runtime, we try to map at a fixed location (SharedBaseAddress). For
1177 // consistency, we log everything using runtime addresses.
1178 class ArchiveBuilder::CDSMapLogger : AllStatic {
1179 static intx buffer_to_runtime_delta() {
1180 // Translate the buffers used by the RW/RO regions to their eventual (requested) locations
1181 // at runtime.
1182 return ArchiveBuilder::current()->buffer_to_requested_delta();
1183 }
1184
1185 // rw/ro regions only
1186 static void log_metaspace_region(const char* name, DumpRegion* region,
1187 const ArchiveBuilder::SourceObjList* src_objs) {
1188 address region_base = address(region->base());
1189 address region_top = address(region->top());
1190 log_region(name, region_base, region_top, region_base + buffer_to_runtime_delta());
1191 log_metaspace_objects(region, src_objs);
1192 }
1193
1194 #define _LOG_PREFIX PTR_FORMAT ": @@ %-17s %d"
1195
1196 static void log_klass(Klass* k, address runtime_dest, const char* type_name, int bytes, Thread* current) {
1197 ResourceMark rm(current);
1198 log_debug(cds, map)(_LOG_PREFIX " %s",
1199 p2i(runtime_dest), type_name, bytes, k->external_name());
1200 }
1201 static void log_method(Method* m, address runtime_dest, const char* type_name, int bytes, Thread* current) {
1202 ResourceMark rm(current);
1203 log_debug(cds, map)(_LOG_PREFIX " %s",
1204 p2i(runtime_dest), type_name, bytes, m->external_name());
1205 }
1206
1207 // rw/ro regions only
1208 static void log_metaspace_objects(DumpRegion* region, const ArchiveBuilder::SourceObjList* src_objs) {
1209 address last_obj_base = address(region->base());
1210 address last_obj_end = address(region->base());
1211 address region_end = address(region->end());
1212 Thread* current = Thread::current();
1213 for (int i = 0; i < src_objs->objs()->length(); i++) {
1214 SourceObjInfo* src_info = src_objs->at(i);
1215 address src = src_info->source_addr();
1216 address dest = src_info->buffered_addr();
1217 log_as_hex(last_obj_base, dest, last_obj_base + buffer_to_runtime_delta());
1218 address runtime_dest = dest + buffer_to_runtime_delta();
1219 int bytes = src_info->size_in_bytes();
1220
1221 MetaspaceObj::Type type = src_info->msotype();
1222 const char* type_name = MetaspaceObj::type_name(type);
1223
1224 switch (type) {
1225 case MetaspaceObj::ClassType:
1226 log_klass((Klass*)src, runtime_dest, type_name, bytes, current);
1227 break;
1228 case MetaspaceObj::ConstantPoolType:
1229 log_klass(((ConstantPool*)src)->pool_holder(),
1230 runtime_dest, type_name, bytes, current);
1231 break;
1232 case MetaspaceObj::ConstantPoolCacheType:
1233 log_klass(((ConstantPoolCache*)src)->constant_pool()->pool_holder(),
1234 runtime_dest, type_name, bytes, current);
1235 break;
1236 case MetaspaceObj::MethodType:
1237 log_method((Method*)src, runtime_dest, type_name, bytes, current);
1238 break;
1239 case MetaspaceObj::ConstMethodType:
1240 log_method(((ConstMethod*)src)->method(), runtime_dest, type_name, bytes, current);
1241 break;
1242 case MetaspaceObj::SymbolType:
1243 {
1244 ResourceMark rm(current);
1245 Symbol* s = (Symbol*)src;
1246 log_debug(cds, map)(_LOG_PREFIX " %s", p2i(runtime_dest), type_name, bytes,
1247 s->as_quoted_ascii());
1248 }
1249 break;
1250 default:
1251 log_debug(cds, map)(_LOG_PREFIX, p2i(runtime_dest), type_name, bytes);
1252 break;
1253 }
1254
1255 last_obj_base = dest;
1256 last_obj_end = dest + bytes;
1257 }
1258
1259 log_as_hex(last_obj_base, last_obj_end, last_obj_base + buffer_to_runtime_delta());
1260 if (last_obj_end < region_end) {
1261 log_debug(cds, map)(PTR_FORMAT ": @@ Misc data " SIZE_FORMAT " bytes",
1262 p2i(last_obj_end + buffer_to_runtime_delta()),
1263 size_t(region_end - last_obj_end));
1264 log_as_hex(last_obj_end, region_end, last_obj_end + buffer_to_runtime_delta());
1265 }
1266 }
1267
1268 #undef _LOG_PREFIX
1269
1270 // Log information about a region, whose address at dump time is [base .. top). At
1271 // runtime, this region will be mapped to requested_base. requested_base is 0 if this
1272 // region will be mapped at os-selected addresses (such as the bitmap region), or will
1273 // be accessed with os::read (the header).
1274 //
1275 // Note: across -Xshare:dump runs, base may be different, but requested_base should
1276 // be the same as the archive contents should be deterministic.
1277 static void log_region(const char* name, address base, address top, address requested_base) {
1278 size_t size = top - base;
1279 base = requested_base;
1280 top = requested_base + size;
1281 log_info(cds, map)("[%-18s " PTR_FORMAT " - " PTR_FORMAT " " SIZE_FORMAT_W(9) " bytes]",
1282 name, p2i(base), p2i(top), size);
1283 }
1284
1285 #if INCLUDE_CDS_JAVA_HEAP
1286 static void log_heap_region(ArchiveHeapInfo* heap_info) {
1287 MemRegion r = heap_info->buffer_region();
1288 address start = address(r.start()); // start of the current oop inside the buffer
1289 address end = address(r.end());
1290 log_region("heap", start, end, ArchiveHeapWriter::buffered_addr_to_requested_addr(start));
1291
1292 LogStreamHandle(Info, cds, map) st;
1293
1294 HeapRootSegments segments = heap_info->heap_root_segments();
1295 assert(segments.base_offset() == 0, "Sanity");
1296
1297 for (size_t seg_idx = 0; seg_idx < segments.count(); seg_idx++) {
1298 address requested_start = ArchiveHeapWriter::buffered_addr_to_requested_addr(start);
1299 st.print_cr(PTR_FORMAT ": Heap roots segment [%d]",
1300 p2i(requested_start), segments.size_in_elems(seg_idx));
1301 start += segments.size_in_bytes(seg_idx);
1302 }
1303 log_heap_roots();
1304
1305 while (start < end) {
1306 size_t byte_size;
1307 oop source_oop = ArchiveHeapWriter::buffered_addr_to_source_obj(start);
1308 address requested_start = ArchiveHeapWriter::buffered_addr_to_requested_addr(start);
1309 st.print(PTR_FORMAT ": @@ Object ", p2i(requested_start));
1310
1311 if (source_oop != nullptr) {
1312 // This is a regular oop that got archived.
1313 print_oop_with_requested_addr_cr(&st, source_oop, false);
1314 byte_size = source_oop->size() * BytesPerWord;
1315 } else if ((byte_size = ArchiveHeapWriter::get_filler_size_at(start)) > 0) {
1316 // We have a filler oop, which also does not exist in BufferOffsetToSourceObjectTable.
1317 st.print_cr("filler " SIZE_FORMAT " bytes", byte_size);
1318 } else {
1319 ShouldNotReachHere();
1320 }
1321
1322 address oop_end = start + byte_size;
1323 log_as_hex(start, oop_end, requested_start, /*is_heap=*/true);
1324
1325 if (source_oop != nullptr) {
1326 log_oop_details(heap_info, source_oop, /*buffered_addr=*/start);
1327 }
1328 start = oop_end;
1329 }
1330 }
1331
1332 // ArchivedFieldPrinter is used to print the fields of archived objects. We can't
1333 // use _source_obj->print_on(), because we want to print the oop fields
1334 // in _source_obj with their requested addresses using print_oop_with_requested_addr_cr().
1335 class ArchivedFieldPrinter : public FieldClosure {
1336 ArchiveHeapInfo* _heap_info;
1337 outputStream* _st;
1338 oop _source_obj;
1339 address _buffered_addr;
1340 public:
1341 ArchivedFieldPrinter(ArchiveHeapInfo* heap_info, outputStream* st, oop src_obj, address buffered_addr) :
1342 _heap_info(heap_info), _st(st), _source_obj(src_obj), _buffered_addr(buffered_addr) {}
1343
1344 void do_field(fieldDescriptor* fd) {
1345 _st->print(" - ");
1346 BasicType ft = fd->field_type();
1347 switch (ft) {
1348 case T_ARRAY:
1349 case T_OBJECT:
1350 fd->print_on(_st); // print just the name and offset
1351 print_oop_with_requested_addr_cr(_st, _source_obj->obj_field(fd->offset()));
1352 break;
1353 default:
1354 if (ArchiveHeapWriter::is_marked_as_native_pointer(_heap_info, _source_obj, fd->offset())) {
1355 print_as_native_pointer(fd);
1356 } else {
1357 fd->print_on_for(_st, cast_to_oop(_buffered_addr)); // name, offset, value
1358 _st->cr();
1359 }
1360 }
1361 }
1362
1363 void print_as_native_pointer(fieldDescriptor* fd) {
1364 LP64_ONLY(assert(fd->field_type() == T_LONG, "must be"));
1365 NOT_LP64 (assert(fd->field_type() == T_INT, "must be"));
1366
1367 // We have a field that looks like an integer, but it's actually a pointer to a MetaspaceObj.
1368 address source_native_ptr = (address)
1369 LP64_ONLY(_source_obj->long_field(fd->offset()))
1370 NOT_LP64( _source_obj->int_field (fd->offset()));
1371 ArchiveBuilder* builder = ArchiveBuilder::current();
1372
1373 // The value of the native pointer at runtime.
1374 address requested_native_ptr = builder->to_requested(builder->get_buffered_addr(source_native_ptr));
1375
1376 // The address of _source_obj at runtime
1377 oop requested_obj = ArchiveHeapWriter::source_obj_to_requested_obj(_source_obj);
1378 // The address of this field in the requested space
1379 assert(requested_obj != nullptr, "Attempting to load field from null oop");
1380 address requested_field_addr = cast_from_oop<address>(requested_obj) + fd->offset();
1381
1382 fd->print_on(_st);
1383 _st->print_cr(PTR_FORMAT " (marked metadata pointer @" PTR_FORMAT " )",
1384 p2i(requested_native_ptr), p2i(requested_field_addr));
1385 }
1386 };
1387
1388 // Print the fields of instanceOops, or the elements of arrayOops
1389 static void log_oop_details(ArchiveHeapInfo* heap_info, oop source_oop, address buffered_addr) {
1390 LogStreamHandle(Trace, cds, map, oops) st;
1391 if (st.is_enabled()) {
1392 Klass* source_klass = source_oop->klass();
1393 ArchiveBuilder* builder = ArchiveBuilder::current();
1394 Klass* requested_klass = builder->to_requested(builder->get_buffered_addr(source_klass));
1395
1396 st.print(" - klass: ");
1397 source_klass->print_value_on(&st);
1398 st.print(" " PTR_FORMAT, p2i(requested_klass));
1399 st.cr();
1400
1401 if (source_oop->is_typeArray()) {
1402 TypeArrayKlass::cast(source_klass)->oop_print_elements_on(typeArrayOop(source_oop), &st);
1403 } else if (source_oop->is_objArray()) {
1404 objArrayOop source_obj_array = objArrayOop(source_oop);
1405 for (int i = 0; i < source_obj_array->length(); i++) {
1406 st.print(" -%4d: ", i);
1407 print_oop_with_requested_addr_cr(&st, source_obj_array->obj_at(i));
1408 }
1409 } else {
1410 st.print_cr(" - fields (" SIZE_FORMAT " words):", source_oop->size());
1411 ArchivedFieldPrinter print_field(heap_info, &st, source_oop, buffered_addr);
1412 InstanceKlass::cast(source_klass)->print_nonstatic_fields(&print_field);
1413
1414 if (java_lang_Class::is_instance(source_oop)) {
1415 st.print(" - signature: ");
1416 if (java_lang_Class::is_primitive(source_oop)) {
1417 st.print("primitive ??");
1418 } else {
1419 java_lang_Class::print_signature(source_oop, &st);
1420 }
1421 st.cr();
1422 }
1423 }
1424 }
1425 }
1426
1427 static void log_heap_roots() {
1428 LogStreamHandle(Trace, cds, map, oops) st;
1429 if (st.is_enabled()) {
1430 for (int i = 0; i < HeapShared::pending_roots()->length(); i++) {
1431 st.print("roots[%4d]: ", i);
1432 print_oop_with_requested_addr_cr(&st, HeapShared::pending_roots()->at(i).resolve());
1433 }
1434 }
1435 }
1436
1437 // The output looks like this. The first number is the requested address. The second number is
1438 // the narrowOop version of the requested address.
1439 // 0x00000007ffc7e840 (0xfff8fd08) java.lang.Class
1440 // 0x00000007ffc000f8 (0xfff8001f) [B length: 11
1441 static void print_oop_with_requested_addr_cr(outputStream* st, oop source_oop, bool print_addr = true) {
1442 if (source_oop == nullptr) {
1443 st->print_cr("null");
1444 } else {
1445 ResourceMark rm;
1446 oop requested_obj = ArchiveHeapWriter::source_obj_to_requested_obj(source_oop);
1447 if (print_addr) {
1448 st->print(PTR_FORMAT " ", p2i(requested_obj));
1449 }
1450 if (UseCompressedOops) {
1451 st->print("(0x%08x) ", CompressedOops::narrow_oop_value(requested_obj));
1452 }
1453 if (source_oop->is_array()) {
1454 int array_len = arrayOop(source_oop)->length();
1455 st->print_cr("%s length: %d", source_oop->klass()->external_name(), array_len);
1456 } else {
1457 st->print("%s", source_oop->klass()->external_name());
1458 if (java_lang_invoke_MethodType::is_instance(source_oop)) {
1459 st->print(" ");
1460 java_lang_invoke_MethodType::print_signature(source_oop, st);
1461 }
1462 st->cr();
1463 }
1464 }
1465 }
1466 #endif // INCLUDE_CDS_JAVA_HEAP
1467
1468 // Log all the data [base...top). Pretend that the base address
1469 // will be mapped to requested_base at run-time.
1470 static void log_as_hex(address base, address top, address requested_base, bool is_heap = false) {
1471 assert(top >= base, "must be");
1472
1473 LogStreamHandle(Trace, cds, map) lsh;
1474 if (lsh.is_enabled()) {
1475 int unitsize = sizeof(address);
1476 if (is_heap && UseCompressedOops) {
1477 // This makes the compressed oop pointers easier to read, but
1478 // longs and doubles will be split into two words.
1479 unitsize = sizeof(narrowOop);
1480 }
1481 os::print_hex_dump(&lsh, base, top, unitsize, /* print_ascii=*/true, /* bytes_per_line=*/32, requested_base);
1482 }
1483 }
1484
1485 static void log_header(FileMapInfo* mapinfo) {
1486 LogStreamHandle(Info, cds, map) lsh;
1487 if (lsh.is_enabled()) {
1488 mapinfo->print(&lsh);
1489 }
1490 }
1491
1492 public:
1493 static void log(ArchiveBuilder* builder, FileMapInfo* mapinfo,
1494 ArchiveHeapInfo* heap_info,
1495 char* bitmap, size_t bitmap_size_in_bytes) {
1496 log_info(cds, map)("%s CDS archive map for %s", CDSConfig::is_dumping_static_archive() ? "Static" : "Dynamic", mapinfo->full_path());
1497
1498 address header = address(mapinfo->header());
1499 address header_end = header + mapinfo->header()->header_size();
1500 log_region("header", header, header_end, nullptr);
1501 log_header(mapinfo);
1502 log_as_hex(header, header_end, nullptr);
1503
1504 DumpRegion* rw_region = &builder->_rw_region;
1505 DumpRegion* ro_region = &builder->_ro_region;
1506
1507 log_metaspace_region("rw region", rw_region, &builder->_rw_src_objs);
1508 log_metaspace_region("ro region", ro_region, &builder->_ro_src_objs);
1509
1510 address bitmap_end = address(bitmap + bitmap_size_in_bytes);
1511 log_region("bitmap", address(bitmap), bitmap_end, nullptr);
1512 log_as_hex((address)bitmap, bitmap_end, nullptr);
1513
1514 #if INCLUDE_CDS_JAVA_HEAP
1515 if (heap_info->is_used()) {
1516 log_heap_region(heap_info);
1517 }
1518 #endif
1519
1520 log_info(cds, map)("[End of CDS archive map]");
1521 }
1522 }; // end ArchiveBuilder::CDSMapLogger
1523
1524 void ArchiveBuilder::print_stats() {
1525 _alloc_stats.print_stats(int(_ro_region.used()), int(_rw_region.used()));
1526 }
1527
1528 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo, ArchiveHeapInfo* heap_info) {
1529 // Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with
1530 // MetaspaceShared::n_regions (internal to hotspot).
1531 assert(NUM_CDS_REGIONS == MetaspaceShared::n_regions, "sanity");
1532
1533 write_region(mapinfo, MetaspaceShared::rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false);
1534 write_region(mapinfo, MetaspaceShared::ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false);
1535 write_region(mapinfo, MetaspaceShared::cc, &_cc_region, /*read_only=*/false,/*allow_exec=*/true);
1536
1537 // Split pointer map into read-write and read-only bitmaps
1538 ArchivePtrMarker::initialize_rw_ro_cc_maps(&_rw_ptrmap, &_ro_ptrmap, &_cc_ptrmap);
1539
1540 size_t bitmap_size_in_bytes;
1541 char* bitmap = mapinfo->write_bitmap_region(ArchivePtrMarker::rw_ptrmap(),
1542 ArchivePtrMarker::ro_ptrmap(),
1543 ArchivePtrMarker::cc_ptrmap(),
1544 heap_info,
1545 bitmap_size_in_bytes);
1546
1547 if (heap_info->is_used()) {
1548 _total_heap_region_size = mapinfo->write_heap_region(heap_info);
1549 }
1550
1551 print_region_stats(mapinfo, heap_info);
1552
1553 mapinfo->set_requested_base((char*)MetaspaceShared::requested_base_address());
1554 mapinfo->set_header_crc(mapinfo->compute_header_crc());
1555 // After this point, we should not write any data into mapinfo->header() since this
1556 // would corrupt its checksum we have calculated before.
1557 mapinfo->write_header();
1558 mapinfo->close();
1559
1560 if (log_is_enabled(Info, cds)) {
1561 print_stats();
1562 }
1563
1564 if (log_is_enabled(Info, cds, map)) {
1565 CDSMapLogger::log(this, mapinfo, heap_info,
1566 bitmap, bitmap_size_in_bytes);
1567 }
1568 CDS_JAVA_HEAP_ONLY(HeapShared::destroy_archived_object_cache());
1569 FREE_C_HEAP_ARRAY(char, bitmap);
1570 }
1571
1572 void ArchiveBuilder::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) {
1573 mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec);
1574 }
1575
1576 void ArchiveBuilder::print_region_stats(FileMapInfo *mapinfo, ArchiveHeapInfo* heap_info) {
1577 // Print statistics of all the regions
1578 const size_t bitmap_used = mapinfo->region_at(MetaspaceShared::bm)->used();
1579 const size_t bitmap_reserved = mapinfo->region_at(MetaspaceShared::bm)->used_aligned();
1580 const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() +
1581 bitmap_reserved +
1582 _total_heap_region_size;
1583 const size_t total_bytes = _ro_region.used() + _rw_region.used() +
1584 bitmap_used +
1585 _total_heap_region_size;
1586 const double total_u_perc = percent_of(total_bytes, total_reserved);
1587
1588 _rw_region.print(total_reserved);
1589 _ro_region.print(total_reserved);
1590 _cc_region.print(total_reserved);
1591
1592 print_bitmap_region_stats(bitmap_used, total_reserved);
1593
1594 if (heap_info->is_used()) {
1595 print_heap_region_stats(heap_info, total_reserved);
1596 }
1597
1598 log_debug(cds)("total : " SIZE_FORMAT_W(9) " [100.0%% of total] out of " SIZE_FORMAT_W(9) " bytes [%5.1f%% used]",
1599 total_bytes, total_reserved, total_u_perc);
1600 }
1601
1602 void ArchiveBuilder::print_bitmap_region_stats(size_t size, size_t total_size) {
1603 log_debug(cds)("bm space: " SIZE_FORMAT_W(9) " [ %4.1f%% of total] out of " SIZE_FORMAT_W(9) " bytes [100.0%% used]",
1604 size, size/double(total_size)*100.0, size);
1605 }
1606
1607 void ArchiveBuilder::print_heap_region_stats(ArchiveHeapInfo *info, size_t total_size) {
1608 char* start = info->buffer_start();
1609 size_t size = info->buffer_byte_size();
1610 char* top = start + size;
1611 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,
1612 size, size/double(total_size)*100.0, size, p2i(start));
1613 }
1614
1615 void ArchiveBuilder::report_out_of_space(const char* name, size_t needed_bytes) {
1616 // This is highly unlikely to happen on 64-bits because we have reserved a 4GB space.
1617 // On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes
1618 // or so.
1619 _rw_region.print_out_of_space_msg(name, needed_bytes);
1620 _ro_region.print_out_of_space_msg(name, needed_bytes);
1621
1622 log_error(cds)("Unable to allocate from '%s' region: Please reduce the number of shared classes.", name);
1623 MetaspaceShared::unrecoverable_writing_error();
1624 }