1 /*
2 * Copyright (c) 2020, 2025, 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 "cds/aotArtifactFinder.hpp"
26 #include "cds/aotClassLinker.hpp"
27 #include "cds/aotLinkedClassBulkLoader.hpp"
28 #include "cds/archiveBuilder.hpp"
29 #include "cds/archiveHeapWriter.hpp"
30 #include "cds/archiveUtils.hpp"
31 #include "cds/cdsConfig.hpp"
32 #include "cds/cppVtables.hpp"
33 #include "cds/dumpAllocStats.hpp"
34 #include "cds/dynamicArchive.hpp"
35 #include "cds/heapShared.hpp"
36 #include "cds/metaspaceShared.hpp"
37 #include "cds/regeneratedClasses.hpp"
38 #include "classfile/classLoader.hpp"
39 #include "classfile/classLoaderDataShared.hpp"
40 #include "classfile/classLoaderExt.hpp"
41 #include "classfile/javaClasses.hpp"
42 #include "classfile/symbolTable.hpp"
43 #include "classfile/systemDictionaryShared.hpp"
44 #include "classfile/vmClasses.hpp"
45 #include "interpreter/abstractInterpreter.hpp"
46 #include "jvm.h"
47 #include "logging/log.hpp"
48 #include "logging/logStream.hpp"
49 #include "memory/allStatic.hpp"
50 #include "memory/memoryReserver.hpp"
51 #include "memory/memRegion.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "oops/compressedKlass.inline.hpp"
54 #include "oops/instanceKlass.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oopHandle.inline.hpp"
58 #include "runtime/arguments.hpp"
59 #include "runtime/fieldDescriptor.inline.hpp"
60 #include "runtime/globals_extension.hpp"
61 #include "runtime/javaThread.hpp"
62 #include "runtime/sharedRuntime.hpp"
63 #include "utilities/align.hpp"
64 #include "utilities/bitMap.inline.hpp"
65 #include "utilities/formatBuffer.hpp"
66
67 ArchiveBuilder* ArchiveBuilder::_current = nullptr;
68
69 ArchiveBuilder::OtherROAllocMark::~OtherROAllocMark() {
70 char* newtop = ArchiveBuilder::current()->_ro_region.top();
71 ArchiveBuilder::alloc_stats()->record_other_type(int(newtop - _oldtop), true);
72 }
73
74 ArchiveBuilder::SourceObjList::SourceObjList() : _ptrmap(16 * K, mtClassShared) {
75 _total_bytes = 0;
76 _objs = new (mtClassShared) GrowableArray<SourceObjInfo*>(128 * K, mtClassShared);
77 }
78
79 ArchiveBuilder::SourceObjList::~SourceObjList() {
80 delete _objs;
81 }
82
83 void ArchiveBuilder::SourceObjList::append(SourceObjInfo* src_info) {
84 // Save this source object for copying
85 src_info->set_id(_objs->length());
86 _objs->append(src_info);
87
88 // Prepare for marking the pointers in this source object
89 assert(is_aligned(_total_bytes, sizeof(address)), "must be");
90 src_info->set_ptrmap_start(_total_bytes / sizeof(address));
91 _total_bytes = align_up(_total_bytes + (uintx)src_info->size_in_bytes(), sizeof(address));
92 src_info->set_ptrmap_end(_total_bytes / sizeof(address));
93
94 BitMap::idx_t bitmap_size_needed = BitMap::idx_t(src_info->ptrmap_end());
95 if (_ptrmap.size() <= bitmap_size_needed) {
96 _ptrmap.resize((bitmap_size_needed + 1) * 2);
97 }
98 }
99
100 void ArchiveBuilder::SourceObjList::remember_embedded_pointer(SourceObjInfo* src_info, MetaspaceClosure::Ref* ref) {
101 // src_obj contains a pointer. Remember the location of this pointer in _ptrmap,
102 // so that we can copy/relocate it later.
103 src_info->set_has_embedded_pointer();
104 address src_obj = src_info->source_addr();
105 address* field_addr = ref->addr();
106 assert(src_info->ptrmap_start() < _total_bytes, "sanity");
107 assert(src_info->ptrmap_end() <= _total_bytes, "sanity");
108 assert(*field_addr != nullptr, "should have checked");
109
110 intx field_offset_in_bytes = ((address)field_addr) - src_obj;
111 DEBUG_ONLY(int src_obj_size = src_info->size_in_bytes();)
112 assert(field_offset_in_bytes >= 0, "must be");
113 assert(field_offset_in_bytes + intx(sizeof(intptr_t)) <= intx(src_obj_size), "must be");
114 assert(is_aligned(field_offset_in_bytes, sizeof(address)), "must be");
115
116 BitMap::idx_t idx = BitMap::idx_t(src_info->ptrmap_start() + (uintx)(field_offset_in_bytes / sizeof(address)));
117 _ptrmap.set_bit(BitMap::idx_t(idx));
118 }
119
120 class RelocateEmbeddedPointers : public BitMapClosure {
121 ArchiveBuilder* _builder;
122 address _buffered_obj;
123 BitMap::idx_t _start_idx;
124 public:
125 RelocateEmbeddedPointers(ArchiveBuilder* builder, address buffered_obj, BitMap::idx_t start_idx) :
126 _builder(builder), _buffered_obj(buffered_obj), _start_idx(start_idx) {}
127
128 bool do_bit(BitMap::idx_t bit_offset) {
129 size_t field_offset = size_t(bit_offset - _start_idx) * sizeof(address);
130 address* ptr_loc = (address*)(_buffered_obj + field_offset);
131
132 address old_p = *ptr_loc;
133 address new_p = _builder->get_buffered_addr(old_p);
134
135 log_trace(cds)("Ref: [" PTR_FORMAT "] -> " PTR_FORMAT " => " PTR_FORMAT,
136 p2i(ptr_loc), p2i(old_p), p2i(new_p));
137
138 ArchivePtrMarker::set_and_mark_pointer(ptr_loc, new_p);
139 return true; // keep iterating the bitmap
140 }
141 };
142
143 void ArchiveBuilder::SourceObjList::relocate(int i, ArchiveBuilder* builder) {
144 SourceObjInfo* src_info = objs()->at(i);
145 assert(src_info->should_copy(), "must be");
146 BitMap::idx_t start = BitMap::idx_t(src_info->ptrmap_start()); // inclusive
147 BitMap::idx_t end = BitMap::idx_t(src_info->ptrmap_end()); // exclusive
148
149 RelocateEmbeddedPointers relocator(builder, src_info->buffered_addr(), start);
150 _ptrmap.iterate(&relocator, start, end);
151 }
152
153 ArchiveBuilder::ArchiveBuilder() :
154 _current_dump_region(nullptr),
155 _buffer_bottom(nullptr),
156 _requested_static_archive_bottom(nullptr),
157 _requested_static_archive_top(nullptr),
158 _requested_dynamic_archive_bottom(nullptr),
159 _requested_dynamic_archive_top(nullptr),
160 _mapped_static_archive_bottom(nullptr),
161 _mapped_static_archive_top(nullptr),
162 _buffer_to_requested_delta(0),
163 _pz_region("pz", MAX_SHARED_DELTA), // protection zone -- used only during dumping; does NOT exist in cds archive.
164 _rw_region("rw", MAX_SHARED_DELTA),
165 _ro_region("ro", MAX_SHARED_DELTA),
166 _ptrmap(mtClassShared),
167 _rw_ptrmap(mtClassShared),
168 _ro_ptrmap(mtClassShared),
169 _rw_src_objs(),
170 _ro_src_objs(),
171 _src_obj_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE),
172 _buffered_to_src_table(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE),
173 _total_heap_region_size(0)
174 {
175 _klasses = new (mtClassShared) GrowableArray<Klass*>(4 * K, mtClassShared);
176 _symbols = new (mtClassShared) GrowableArray<Symbol*>(256 * K, mtClassShared);
177 _entropy_seed = 0x12345678;
178 assert(_current == nullptr, "must be");
179 _current = this;
180 }
181
182 ArchiveBuilder::~ArchiveBuilder() {
183 assert(_current == this, "must be");
184 _current = nullptr;
185
186 for (int i = 0; i < _symbols->length(); i++) {
187 _symbols->at(i)->decrement_refcount();
188 }
189
190 delete _klasses;
191 delete _symbols;
192 if (_shared_rs.is_reserved()) {
193 MemoryReserver::release(_shared_rs);
194 }
195
196 AOTArtifactFinder::dispose();
197 }
198
199 // Returns a deterministic sequence of pseudo random numbers. The main purpose is NOT
200 // for randomness but to get good entropy for the identity_hash() of archived Symbols,
201 // while keeping the contents of static CDS archives deterministic to ensure
202 // reproducibility of JDK builds.
203 int ArchiveBuilder::entropy() {
204 assert(SafepointSynchronize::is_at_safepoint(), "needed to ensure deterministic sequence");
205 _entropy_seed = os::next_random(_entropy_seed);
206 return static_cast<int>(_entropy_seed);
207 }
208
209 class GatherKlassesAndSymbols : public UniqueMetaspaceClosure {
210 ArchiveBuilder* _builder;
211
212 public:
213 GatherKlassesAndSymbols(ArchiveBuilder* builder) : _builder(builder) {}
214
215 virtual bool do_unique_ref(Ref* ref, bool read_only) {
216 return _builder->gather_klass_and_symbol(ref, read_only);
217 }
218 };
219
220 bool ArchiveBuilder::gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only) {
221 if (ref->obj() == nullptr) {
222 return false;
223 }
224 if (get_follow_mode(ref) != make_a_copy) {
225 return false;
226 }
227 if (ref->msotype() == MetaspaceObj::ClassType) {
228 Klass* klass = (Klass*)ref->obj();
229 assert(klass->is_klass(), "must be");
230 if (!is_excluded(klass)) {
231 _klasses->append(klass);
232 if (klass->is_hidden()) {
233 assert(klass->is_instance_klass(), "must be");
234 }
235 }
236 } else if (ref->msotype() == MetaspaceObj::SymbolType) {
237 // Make sure the symbol won't be GC'ed while we are dumping the archive.
238 Symbol* sym = (Symbol*)ref->obj();
239 sym->increment_refcount();
240 _symbols->append(sym);
241 }
242
243 return true; // recurse
244 }
245
246 void ArchiveBuilder::gather_klasses_and_symbols() {
247 ResourceMark rm;
248
249 AOTArtifactFinder::initialize();
250 AOTArtifactFinder::find_artifacts();
251
252 log_info(cds)("Gathering classes and symbols ... ");
253 GatherKlassesAndSymbols doit(this);
254 iterate_roots(&doit);
255 #if INCLUDE_CDS_JAVA_HEAP
256 if (CDSConfig::is_dumping_full_module_graph()) {
257 ClassLoaderDataShared::iterate_symbols(&doit);
258 }
259 #endif
260 doit.finish();
261
262 if (CDSConfig::is_dumping_static_archive()) {
263 // To ensure deterministic contents in the static archive, we need to ensure that
264 // we iterate the MetaspaceObjs in a deterministic order. It doesn't matter where
265 // the MetaspaceObjs are located originally, as they are copied sequentially into
266 // the archive during the iteration.
267 //
268 // The only issue here is that the symbol table and the system directories may be
269 // randomly ordered, so we copy the symbols and klasses into two arrays and sort
270 // them deterministically.
271 //
272 // During -Xshare:dump, the order of Symbol creation is strictly determined by
273 // the SharedClassListFile (class loading is done in a single thread and the JIT
274 // is disabled). Also, Symbols are allocated in monotonically increasing addresses
275 // (see Symbol::operator new(size_t, int)). So if we iterate the Symbols by
276 // ascending address order, we ensure that all Symbols are copied into deterministic
277 // locations in the archive.
278 //
279 // TODO: in the future, if we want to produce deterministic contents in the
280 // dynamic archive, we might need to sort the symbols alphabetically (also see
281 // DynamicArchiveBuilder::sort_methods()).
282 log_info(cds)("Sorting symbols ... ");
283 _symbols->sort(compare_symbols_by_address);
284 sort_klasses();
285 }
286
287 AOTClassLinker::add_candidates();
288 }
289
290 int ArchiveBuilder::compare_symbols_by_address(Symbol** a, Symbol** b) {
291 if (a[0] < b[0]) {
292 return -1;
293 } else {
294 assert(a[0] > b[0], "Duplicated symbol %s unexpected", (*a)->as_C_string());
295 return 1;
296 }
297 }
298
299 int ArchiveBuilder::compare_klass_by_name(Klass** a, Klass** b) {
300 return a[0]->name()->fast_compare(b[0]->name());
301 }
302
303 void ArchiveBuilder::sort_klasses() {
304 log_info(cds)("Sorting classes ... ");
305 _klasses->sort(compare_klass_by_name);
306 }
307
308 address ArchiveBuilder::reserve_buffer() {
309 size_t buffer_size = LP64_ONLY(CompressedClassSpaceSize) NOT_LP64(256 * M);
310 ReservedSpace rs = MemoryReserver::reserve(buffer_size,
311 MetaspaceShared::core_region_alignment(),
312 os::vm_page_size());
313 if (!rs.is_reserved()) {
314 log_error(cds)("Failed to reserve %zu bytes of output buffer.", buffer_size);
315 MetaspaceShared::unrecoverable_writing_error();
316 }
317
318 // buffer_bottom is the lowest address of the 2 core regions (rw, ro) when
319 // we are copying the class metadata into the buffer.
320 address buffer_bottom = (address)rs.base();
321 log_info(cds)("Reserved output buffer space at " PTR_FORMAT " [%zu bytes]",
322 p2i(buffer_bottom), buffer_size);
323 _shared_rs = rs;
324
325 _buffer_bottom = buffer_bottom;
326
327 if (CDSConfig::is_dumping_static_archive()) {
328 _current_dump_region = &_pz_region;
329 } else {
330 _current_dump_region = &_rw_region;
331 }
332 _current_dump_region->init(&_shared_rs, &_shared_vs);
333
334 ArchivePtrMarker::initialize(&_ptrmap, &_shared_vs);
335
336 // The bottom of the static archive should be mapped at this address by default.
337 _requested_static_archive_bottom = (address)MetaspaceShared::requested_base_address();
338
339 // The bottom of the archive (that I am writing now) should be mapped at this address by default.
340 address my_archive_requested_bottom;
341
342 if (CDSConfig::is_dumping_static_archive()) {
343 my_archive_requested_bottom = _requested_static_archive_bottom;
344 } else {
345 _mapped_static_archive_bottom = (address)MetaspaceObj::shared_metaspace_base();
346 _mapped_static_archive_top = (address)MetaspaceObj::shared_metaspace_top();
347 assert(_mapped_static_archive_top >= _mapped_static_archive_bottom, "must be");
348 size_t static_archive_size = _mapped_static_archive_top - _mapped_static_archive_bottom;
349
350 // At run time, we will mmap the dynamic archive at my_archive_requested_bottom
351 _requested_static_archive_top = _requested_static_archive_bottom + static_archive_size;
352 my_archive_requested_bottom = align_up(_requested_static_archive_top, MetaspaceShared::core_region_alignment());
353
354 _requested_dynamic_archive_bottom = my_archive_requested_bottom;
355 }
356
357 _buffer_to_requested_delta = my_archive_requested_bottom - _buffer_bottom;
358
359 address my_archive_requested_top = my_archive_requested_bottom + buffer_size;
360 if (my_archive_requested_bottom < _requested_static_archive_bottom ||
361 my_archive_requested_top <= _requested_static_archive_bottom) {
362 // Size overflow.
363 log_error(cds)("my_archive_requested_bottom = " INTPTR_FORMAT, p2i(my_archive_requested_bottom));
364 log_error(cds)("my_archive_requested_top = " INTPTR_FORMAT, p2i(my_archive_requested_top));
365 log_error(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is too high. "
366 "Please rerun java -Xshare:dump with a lower value", p2i(_requested_static_archive_bottom));
367 MetaspaceShared::unrecoverable_writing_error();
368 }
369
370 if (CDSConfig::is_dumping_static_archive()) {
371 // We don't want any valid object to be at the very bottom of the archive.
372 // See ArchivePtrMarker::mark_pointer().
373 _pz_region.allocate(MetaspaceShared::protection_zone_size());
374 start_dump_region(&_rw_region);
375 }
376
377 return buffer_bottom;
378 }
379
380 void ArchiveBuilder::iterate_sorted_roots(MetaspaceClosure* it) {
381 int num_symbols = _symbols->length();
382 for (int i = 0; i < num_symbols; i++) {
383 it->push(_symbols->adr_at(i));
384 }
385
386 int num_klasses = _klasses->length();
387 for (int i = 0; i < num_klasses; i++) {
388 it->push(_klasses->adr_at(i));
389 }
390
391 iterate_roots(it);
392 }
393
394 class GatherSortedSourceObjs : public MetaspaceClosure {
395 ArchiveBuilder* _builder;
396
397 public:
398 GatherSortedSourceObjs(ArchiveBuilder* builder) : _builder(builder) {}
399
400 virtual bool do_ref(Ref* ref, bool read_only) {
401 return _builder->gather_one_source_obj(ref, read_only);
402 }
403 };
404
405 bool ArchiveBuilder::gather_one_source_obj(MetaspaceClosure::Ref* ref, bool read_only) {
406 address src_obj = ref->obj();
407 if (src_obj == nullptr) {
408 return false;
409 }
410
411 remember_embedded_pointer_in_enclosing_obj(ref);
412 if (RegeneratedClasses::has_been_regenerated(src_obj)) {
413 // No need to copy it. We will later relocate it to point to the regenerated klass/method.
414 return false;
415 }
416
417 FollowMode follow_mode = get_follow_mode(ref);
418 SourceObjInfo src_info(ref, read_only, follow_mode);
419 bool created;
420 SourceObjInfo* p = _src_obj_table.put_if_absent(src_obj, src_info, &created);
421 if (created) {
422 if (_src_obj_table.maybe_grow()) {
423 log_info(cds, hashtables)("Expanded _src_obj_table table to %d", _src_obj_table.table_size());
424 }
425 }
426
427 #ifdef ASSERT
428 if (ref->msotype() == MetaspaceObj::MethodType) {
429 Method* m = (Method*)ref->obj();
430 assert(!RegeneratedClasses::has_been_regenerated((address)m->method_holder()),
431 "Should not archive methods in a class that has been regenerated");
432 }
433 #endif
434
435 assert(p->read_only() == src_info.read_only(), "must be");
436
437 if (created && src_info.should_copy()) {
438 if (read_only) {
439 _ro_src_objs.append(p);
440 } else {
441 _rw_src_objs.append(p);
442 }
443 return true; // Need to recurse into this ref only if we are copying it
444 } else {
445 return false;
446 }
447 }
448
449 void ArchiveBuilder::record_regenerated_object(address orig_src_obj, address regen_src_obj) {
450 // Record the fact that orig_src_obj has been replaced by regen_src_obj. All calls to get_buffered_addr(orig_src_obj)
451 // should return the same value as get_buffered_addr(regen_src_obj).
452 SourceObjInfo* p = _src_obj_table.get(regen_src_obj);
453 assert(p != nullptr, "regenerated object should always be dumped");
454 SourceObjInfo orig_src_info(orig_src_obj, p);
455 bool created;
456 _src_obj_table.put_if_absent(orig_src_obj, orig_src_info, &created);
457 assert(created, "We shouldn't have archived the original copy of a regenerated object");
458 }
459
460 // Remember that we have a pointer inside ref->enclosing_obj() that points to ref->obj()
461 void ArchiveBuilder::remember_embedded_pointer_in_enclosing_obj(MetaspaceClosure::Ref* ref) {
462 assert(ref->obj() != nullptr, "should have checked");
463
464 address enclosing_obj = ref->enclosing_obj();
465 if (enclosing_obj == nullptr) {
466 return;
467 }
468
469 // We are dealing with 3 addresses:
470 // address o = ref->obj(): We have found an object whose address is o.
471 // address* mpp = ref->mpp(): The object o is pointed to by a pointer whose address is mpp.
472 // I.e., (*mpp == o)
473 // enclosing_obj : If non-null, it is the object which has a field that points to o.
474 // mpp is the address if that field.
475 //
476 // Example: We have an array whose first element points to a Method:
477 // Method* o = 0x0000abcd;
478 // Array<Method*>* enclosing_obj = 0x00001000;
479 // enclosing_obj->at_put(0, o);
480 //
481 // We the MetaspaceClosure iterates on the very first element of this array, we have
482 // ref->obj() == 0x0000abcd (the Method)
483 // ref->mpp() == 0x00001008 (the location of the first element in the array)
484 // ref->enclosing_obj() == 0x00001000 (the Array that contains the Method)
485 //
486 // We use the above information to mark the bitmap to indicate that there's a pointer on address 0x00001008.
487 SourceObjInfo* src_info = _src_obj_table.get(enclosing_obj);
488 if (src_info == nullptr || !src_info->should_copy()) {
489 // source objects of point_to_it/set_to_null types are not copied
490 // so we don't need to remember their pointers.
491 } else {
492 if (src_info->read_only()) {
493 _ro_src_objs.remember_embedded_pointer(src_info, ref);
494 } else {
495 _rw_src_objs.remember_embedded_pointer(src_info, ref);
496 }
497 }
498 }
499
500 void ArchiveBuilder::gather_source_objs() {
501 ResourceMark rm;
502 log_info(cds)("Gathering all archivable objects ... ");
503 gather_klasses_and_symbols();
504 GatherSortedSourceObjs doit(this);
505 iterate_sorted_roots(&doit);
506 doit.finish();
507 }
508
509 bool ArchiveBuilder::is_excluded(Klass* klass) {
510 if (klass->is_instance_klass()) {
511 InstanceKlass* ik = InstanceKlass::cast(klass);
512 return SystemDictionaryShared::is_excluded_class(ik);
513 } else if (klass->is_objArray_klass()) {
514 Klass* bottom = ObjArrayKlass::cast(klass)->bottom_klass();
515 if (CDSConfig::is_dumping_dynamic_archive() && MetaspaceShared::is_shared_static(bottom)) {
516 // The bottom class is in the static archive so it's clearly not excluded.
517 return false;
518 } else if (bottom->is_instance_klass()) {
519 return SystemDictionaryShared::is_excluded_class(InstanceKlass::cast(bottom));
520 }
521 }
522
523 return false;
524 }
525
526 ArchiveBuilder::FollowMode ArchiveBuilder::get_follow_mode(MetaspaceClosure::Ref *ref) {
527 address obj = ref->obj();
528 if (CDSConfig::is_dumping_dynamic_archive() && MetaspaceShared::is_in_shared_metaspace(obj)) {
529 // Don't dump existing shared metadata again.
530 return point_to_it;
531 } else if (ref->msotype() == MetaspaceObj::MethodDataType ||
532 ref->msotype() == MetaspaceObj::MethodCountersType) {
533 return set_to_null;
534 } else {
535 if (ref->msotype() == MetaspaceObj::ClassType) {
536 Klass* klass = (Klass*)ref->obj();
537 assert(klass->is_klass(), "must be");
538 if (is_excluded(klass)) {
539 ResourceMark rm;
540 log_debug(cds, dynamic)("Skipping class (excluded): %s", klass->external_name());
541 return set_to_null;
542 }
543 }
544
545 return make_a_copy;
546 }
547 }
548
549 void ArchiveBuilder::start_dump_region(DumpRegion* next) {
550 current_dump_region()->pack(next);
551 _current_dump_region = next;
552 }
553
554 char* ArchiveBuilder::ro_strdup(const char* s) {
555 char* archived_str = ro_region_alloc((int)strlen(s) + 1);
556 strcpy(archived_str, s);
557 return archived_str;
558 }
559
560 // The objects that have embedded pointers will sink
561 // towards the end of the list. This ensures we have a maximum
562 // number of leading zero bits in the relocation bitmap.
563 int ArchiveBuilder::compare_src_objs(SourceObjInfo** a, SourceObjInfo** b) {
564 if ((*a)->has_embedded_pointer() && !(*b)->has_embedded_pointer()) {
565 return 1;
566 } else if (!(*a)->has_embedded_pointer() && (*b)->has_embedded_pointer()) {
567 return -1;
568 } else {
569 // This is necessary to keep the sorting order stable. Otherwise the
570 // archive's contents may not be deterministic.
571 return (*a)->id() - (*b)->id();
572 }
573 }
574
575 void ArchiveBuilder::sort_metadata_objs() {
576 _rw_src_objs.objs()->sort(compare_src_objs);
577 _ro_src_objs.objs()->sort(compare_src_objs);
578 }
579
580 void ArchiveBuilder::dump_rw_metadata() {
581 ResourceMark rm;
582 log_info(cds)("Allocating RW objects ... ");
583 make_shallow_copies(&_rw_region, &_rw_src_objs);
584
585 #if INCLUDE_CDS_JAVA_HEAP
586 if (CDSConfig::is_dumping_full_module_graph()) {
587 // Archive the ModuleEntry's and PackageEntry's of the 3 built-in loaders
588 char* start = rw_region()->top();
589 ClassLoaderDataShared::allocate_archived_tables();
590 alloc_stats()->record_modules(rw_region()->top() - start, /*read_only*/false);
591 }
592 #endif
593 }
594
595 void ArchiveBuilder::dump_ro_metadata() {
596 ResourceMark rm;
597 log_info(cds)("Allocating RO objects ... ");
598
599 start_dump_region(&_ro_region);
600 make_shallow_copies(&_ro_region, &_ro_src_objs);
601
602 #if INCLUDE_CDS_JAVA_HEAP
603 if (CDSConfig::is_dumping_full_module_graph()) {
604 char* start = ro_region()->top();
605 ClassLoaderDataShared::init_archived_tables();
606 alloc_stats()->record_modules(ro_region()->top() - start, /*read_only*/true);
607 }
608 #endif
609
610 RegeneratedClasses::record_regenerated_objects();
611 }
612
613 void ArchiveBuilder::make_shallow_copies(DumpRegion *dump_region,
614 const ArchiveBuilder::SourceObjList* src_objs) {
615 for (int i = 0; i < src_objs->objs()->length(); i++) {
616 make_shallow_copy(dump_region, src_objs->objs()->at(i));
617 }
618 log_info(cds)("done (%d objects)", src_objs->objs()->length());
619 }
620
621 void ArchiveBuilder::make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info) {
622 address src = src_info->source_addr();
623 int bytes = src_info->size_in_bytes();
624 char* dest;
625 char* oldtop;
626 char* newtop;
627
628 oldtop = dump_region->top();
629 if (src_info->msotype() == MetaspaceObj::ClassType) {
630 // Allocate space for a pointer directly in front of the future InstanceKlass, so
631 // we can do a quick lookup from InstanceKlass* -> RunTimeClassInfo*
632 // without building another hashtable. See RunTimeClassInfo::get_for()
633 // in systemDictionaryShared.cpp.
634 Klass* klass = (Klass*)src;
635 if (klass->is_instance_klass()) {
636 SystemDictionaryShared::validate_before_archiving(InstanceKlass::cast(klass));
637 dump_region->allocate(sizeof(address));
638 }
639 // Allocate space for the future InstanceKlass with proper alignment
640 const size_t alignment =
641 #ifdef _LP64
642 UseCompressedClassPointers ?
643 nth_bit(ArchiveBuilder::precomputed_narrow_klass_shift()) :
644 SharedSpaceObjectAlignment;
645 #else
646 SharedSpaceObjectAlignment;
647 #endif
648 dest = dump_region->allocate(bytes, alignment);
649 } else {
650 dest = dump_region->allocate(bytes);
651 }
652 newtop = dump_region->top();
653
654 memcpy(dest, src, bytes);
655
656 // Update the hash of buffered sorted symbols for static dump so that the symbols have deterministic contents
657 if (CDSConfig::is_dumping_static_archive() && (src_info->msotype() == MetaspaceObj::SymbolType)) {
658 Symbol* buffered_symbol = (Symbol*)dest;
659 assert(((Symbol*)src)->is_permanent(), "archived symbols must be permanent");
660 buffered_symbol->update_identity_hash();
661 }
662
663 {
664 bool created;
665 _buffered_to_src_table.put_if_absent((address)dest, src, &created);
666 assert(created, "must be");
667 if (_buffered_to_src_table.maybe_grow()) {
668 log_info(cds, hashtables)("Expanded _buffered_to_src_table table to %d", _buffered_to_src_table.table_size());
669 }
670 }
671
672 intptr_t* archived_vtable = CppVtables::get_archived_vtable(src_info->msotype(), (address)dest);
673 if (archived_vtable != nullptr) {
674 *(address*)dest = (address)archived_vtable;
675 ArchivePtrMarker::mark_pointer((address*)dest);
676 }
677
678 log_trace(cds)("Copy: " PTR_FORMAT " ==> " PTR_FORMAT " %d", p2i(src), p2i(dest), bytes);
679 src_info->set_buffered_addr((address)dest);
680
681 _alloc_stats.record(src_info->msotype(), int(newtop - oldtop), src_info->read_only());
682
683 DEBUG_ONLY(_alloc_stats.verify((int)dump_region->used(), src_info->read_only()));
684 }
685
686 // This is used by code that hand-assembles data structures, such as the LambdaProxyClassKey, that are
687 // not handled by MetaspaceClosure.
688 void ArchiveBuilder::write_pointer_in_buffer(address* ptr_location, address src_addr) {
689 assert(is_in_buffer_space(ptr_location), "must be");
690 if (src_addr == nullptr) {
691 *ptr_location = nullptr;
692 ArchivePtrMarker::clear_pointer(ptr_location);
693 } else {
694 *ptr_location = get_buffered_addr(src_addr);
695 ArchivePtrMarker::mark_pointer(ptr_location);
696 }
697 }
698
699 void ArchiveBuilder::mark_and_relocate_to_buffered_addr(address* ptr_location) {
700 assert(*ptr_location != nullptr, "sanity");
701 if (!is_in_mapped_static_archive(*ptr_location)) {
702 *ptr_location = get_buffered_addr(*ptr_location);
703 }
704 ArchivePtrMarker::mark_pointer(ptr_location);
705 }
706
707 bool ArchiveBuilder::has_been_buffered(address src_addr) const {
708 if (RegeneratedClasses::has_been_regenerated(src_addr) ||
709 _src_obj_table.get(src_addr) == nullptr ||
710 get_buffered_addr(src_addr) == nullptr) {
711 return false;
712 } else {
713 return true;
714 }
715 }
716
717 address ArchiveBuilder::get_buffered_addr(address src_addr) const {
718 SourceObjInfo* p = _src_obj_table.get(src_addr);
719 assert(p != nullptr, "src_addr " INTPTR_FORMAT " is used but has not been archived",
720 p2i(src_addr));
721
722 return p->buffered_addr();
723 }
724
725 address ArchiveBuilder::get_source_addr(address buffered_addr) const {
726 assert(is_in_buffer_space(buffered_addr), "must be");
727 address* src_p = _buffered_to_src_table.get(buffered_addr);
728 assert(src_p != nullptr && *src_p != nullptr, "must be");
729 return *src_p;
730 }
731
732 void ArchiveBuilder::relocate_embedded_pointers(ArchiveBuilder::SourceObjList* src_objs) {
733 for (int i = 0; i < src_objs->objs()->length(); i++) {
734 src_objs->relocate(i, this);
735 }
736 }
737
738 void ArchiveBuilder::relocate_metaspaceobj_embedded_pointers() {
739 log_info(cds)("Relocating embedded pointers in core regions ... ");
740 relocate_embedded_pointers(&_rw_src_objs);
741 relocate_embedded_pointers(&_ro_src_objs);
742 }
743
744 #define ADD_COUNT(x) \
745 x += 1; \
746 x ## _a += aotlinked ? 1 : 0; \
747 x ## _i += inited ? 1 : 0;
748
749 #define DECLARE_INSTANCE_KLASS_COUNTER(x) \
750 int x = 0; \
751 int x ## _a = 0; \
752 int x ## _i = 0;
753
754 void ArchiveBuilder::make_klasses_shareable() {
755 DECLARE_INSTANCE_KLASS_COUNTER(num_instance_klasses);
756 DECLARE_INSTANCE_KLASS_COUNTER(num_boot_klasses);
757 DECLARE_INSTANCE_KLASS_COUNTER(num_vm_klasses);
758 DECLARE_INSTANCE_KLASS_COUNTER(num_platform_klasses);
759 DECLARE_INSTANCE_KLASS_COUNTER(num_app_klasses);
760 DECLARE_INSTANCE_KLASS_COUNTER(num_old_klasses);
761 DECLARE_INSTANCE_KLASS_COUNTER(num_hidden_klasses);
762 DECLARE_INSTANCE_KLASS_COUNTER(num_enum_klasses);
763 DECLARE_INSTANCE_KLASS_COUNTER(num_unregistered_klasses);
764 int num_unlinked_klasses = 0;
765 int num_obj_array_klasses = 0;
766 int num_type_array_klasses = 0;
767
768 int boot_unlinked = 0;
769 int platform_unlinked = 0;
770 int app_unlinked = 0;
771 int unreg_unlinked = 0;
772
773 for (int i = 0; i < klasses()->length(); i++) {
774 // Some of the code in ConstantPool::remove_unshareable_info() requires the classes
775 // to be in linked state, so it must be call here before the next loop, which returns
776 // all classes to unlinked state.
777 Klass* k = get_buffered_addr(klasses()->at(i));
778 if (k->is_instance_klass()) {
779 InstanceKlass::cast(k)->constants()->remove_unshareable_info();
780 }
781 }
782
783 for (int i = 0; i < klasses()->length(); i++) {
784 const char* type;
785 const char* unlinked = "";
786 const char* kind = "";
787 const char* hidden = "";
788 const char* old = "";
789 const char* generated = "";
790 const char* aotlinked_msg = "";
791 const char* inited_msg = "";
792 Klass* k = get_buffered_addr(klasses()->at(i));
793 bool inited = false;
794 k->remove_java_mirror();
795 #ifdef _LP64
796 if (UseCompactObjectHeaders) {
797 Klass* requested_k = to_requested(k);
798 address narrow_klass_base = _requested_static_archive_bottom; // runtime encoding base == runtime mapping start
799 const int narrow_klass_shift = precomputed_narrow_klass_shift();
800 narrowKlass nk = CompressedKlassPointers::encode_not_null_without_asserts(requested_k, narrow_klass_base, narrow_klass_shift);
801 k->set_prototype_header(markWord::prototype().set_narrow_klass(nk));
802 }
803 #endif //_LP64
804 if (k->is_objArray_klass()) {
805 // InstanceKlass and TypeArrayKlass will in turn call remove_unshareable_info
806 // on their array classes.
807 num_obj_array_klasses ++;
808 type = "array";
809 } else if (k->is_typeArray_klass()) {
810 num_type_array_klasses ++;
811 type = "array";
812 k->remove_unshareable_info();
813 } else {
814 assert(k->is_instance_klass(), " must be");
815 InstanceKlass* ik = InstanceKlass::cast(k);
816 InstanceKlass* src_ik = get_source_addr(ik);
817 bool aotlinked = AOTClassLinker::is_candidate(src_ik);
818 inited = ik->has_aot_initialized_mirror();
819 ADD_COUNT(num_instance_klasses);
820 if (CDSConfig::is_dumping_dynamic_archive()) {
821 // For static dump, class loader type are already set.
822 ik->assign_class_loader_type();
823 }
824 if (ik->is_hidden()) {
825 ADD_COUNT(num_hidden_klasses);
826 hidden = " hidden";
827 oop loader = k->class_loader();
828 if (loader == nullptr) {
829 type = "boot";
830 ADD_COUNT(num_boot_klasses);
831 } else if (loader == SystemDictionary::java_platform_loader()) {
832 type = "plat";
833 ADD_COUNT(num_platform_klasses);
834 } else if (loader == SystemDictionary::java_system_loader()) {
835 type = "app";
836 ADD_COUNT(num_app_klasses);
837 } else {
838 type = "bad";
839 assert(0, "shouldn't happen");
840 }
841 if (CDSConfig::is_dumping_method_handles()) {
842 assert(HeapShared::is_archivable_hidden_klass(ik), "sanity");
843 } else {
844 // Legacy CDS support for lambda proxies
845 CDS_JAVA_HEAP_ONLY(assert(HeapShared::is_lambda_proxy_klass(ik), "sanity");)
846 }
847 } else if (ik->is_shared_boot_class()) {
848 type = "boot";
849 ADD_COUNT(num_boot_klasses);
850 } else if (ik->is_shared_platform_class()) {
851 type = "plat";
852 ADD_COUNT(num_platform_klasses);
853 } else if (ik->is_shared_app_class()) {
854 type = "app";
855 ADD_COUNT(num_app_klasses);
856 } else {
857 assert(ik->is_shared_unregistered_class(), "must be");
858 type = "unreg";
859 ADD_COUNT(num_unregistered_klasses);
860 }
861
862 if (AOTClassLinker::is_vm_class(src_ik)) {
863 ADD_COUNT(num_vm_klasses);
864 }
865
866 if (!ik->is_linked()) {
867 num_unlinked_klasses ++;
868 unlinked = " unlinked";
869 if (ik->is_shared_boot_class()) {
870 boot_unlinked ++;
871 } else if (ik->is_shared_platform_class()) {
872 platform_unlinked ++;
873 } else if (ik->is_shared_app_class()) {
874 app_unlinked ++;
875 } else {
876 unreg_unlinked ++;
877 }
878 }
879
880 if (ik->is_interface()) {
881 kind = " interface";
882 } else if (src_ik->is_enum_subclass()) {
883 kind = " enum";
884 ADD_COUNT(num_enum_klasses);
885 }
886
887 if (!ik->can_be_verified_at_dumptime()) {
888 ADD_COUNT(num_old_klasses);
889 old = " old";
890 }
891
892 if (ik->is_generated_shared_class()) {
893 generated = " generated";
894 }
895 if (aotlinked) {
896 aotlinked_msg = " aot-linked";
897 }
898 if (inited) {
899 if (InstanceKlass::cast(k)->static_field_size() == 0) {
900 inited_msg = " inited (no static fields)";
901 } else {
902 inited_msg = " inited";
903 }
904 }
905
906 MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread::current(), ik);
907 ik->remove_unshareable_info();
908 }
909
910 if (log_is_enabled(Debug, cds, class)) {
911 ResourceMark rm;
912 log_debug(cds, class)("klasses[%5d] = " PTR_FORMAT " %-5s %s%s%s%s%s%s%s%s", i,
913 p2i(to_requested(k)), type, k->external_name(),
914 kind, hidden, old, unlinked, generated, aotlinked_msg, inited_msg);
915 }
916 }
917
918 #define STATS_FORMAT "= %5d, aot-linked = %5d, inited = %5d"
919 #define STATS_PARAMS(x) num_ ## x, num_ ## x ## _a, num_ ## x ## _i
920
921 log_info(cds)("Number of classes %d", num_instance_klasses + num_obj_array_klasses + num_type_array_klasses);
922 log_info(cds)(" instance classes " STATS_FORMAT, STATS_PARAMS(instance_klasses));
923 log_info(cds)(" boot " STATS_FORMAT, STATS_PARAMS(boot_klasses));
924 log_info(cds)(" vm " STATS_FORMAT, STATS_PARAMS(vm_klasses));
925 log_info(cds)(" platform " STATS_FORMAT, STATS_PARAMS(platform_klasses));
926 log_info(cds)(" app " STATS_FORMAT, STATS_PARAMS(app_klasses));
927 log_info(cds)(" unregistered " STATS_FORMAT, STATS_PARAMS(unregistered_klasses));
928 log_info(cds)(" (enum) " STATS_FORMAT, STATS_PARAMS(enum_klasses));
929 log_info(cds)(" (hidden) " STATS_FORMAT, STATS_PARAMS(hidden_klasses));
930 log_info(cds)(" (old) " STATS_FORMAT, STATS_PARAMS(old_klasses));
931 log_info(cds)(" (unlinked) = %5d, boot = %d, plat = %d, app = %d, unreg = %d",
932 num_unlinked_klasses, boot_unlinked, platform_unlinked, app_unlinked, unreg_unlinked);
933 log_info(cds)(" obj array classes = %5d", num_obj_array_klasses);
934 log_info(cds)(" type array classes = %5d", num_type_array_klasses);
935 log_info(cds)(" symbols = %5d", _symbols->length());
936
937 #undef STATS_FORMAT
938 #undef STATS_PARAMS
939
940 DynamicArchive::make_array_klasses_shareable();
941 }
942
943 void ArchiveBuilder::serialize_dynamic_archivable_items(SerializeClosure* soc) {
944 SymbolTable::serialize_shared_table_header(soc, false);
945 SystemDictionaryShared::serialize_dictionary_headers(soc, false);
946 DynamicArchive::serialize_array_klasses(soc);
947 AOTLinkedClassBulkLoader::serialize(soc, false);
948 }
949
950 uintx ArchiveBuilder::buffer_to_offset(address p) const {
951 address requested_p = to_requested(p);
952 assert(requested_p >= _requested_static_archive_bottom, "must be");
953 return requested_p - _requested_static_archive_bottom;
954 }
955
956 uintx ArchiveBuilder::any_to_offset(address p) const {
957 if (is_in_mapped_static_archive(p)) {
958 assert(CDSConfig::is_dumping_dynamic_archive(), "must be");
959 return p - _mapped_static_archive_bottom;
960 }
961 if (!is_in_buffer_space(p)) {
962 // p must be a "source" address
963 p = get_buffered_addr(p);
964 }
965 return buffer_to_offset(p);
966 }
967
968 address ArchiveBuilder::offset_to_buffered_address(u4 offset) const {
969 address requested_addr = _requested_static_archive_bottom + offset;
970 address buffered_addr = requested_addr - _buffer_to_requested_delta;
971 assert(is_in_buffer_space(buffered_addr), "bad offset");
972 return buffered_addr;
973 }
974
975 #if INCLUDE_CDS_JAVA_HEAP
976 narrowKlass ArchiveBuilder::get_requested_narrow_klass(Klass* k) {
977 assert(CDSConfig::is_dumping_heap(), "sanity");
978 k = get_buffered_klass(k);
979 Klass* requested_k = to_requested(k);
980 const int narrow_klass_shift = ArchiveBuilder::precomputed_narrow_klass_shift();
981 #ifdef ASSERT
982 const size_t klass_alignment = MAX2(SharedSpaceObjectAlignment, (size_t)nth_bit(narrow_klass_shift));
983 assert(is_aligned(k, klass_alignment), "Klass " PTR_FORMAT " misaligned.", p2i(k));
984 #endif
985 address narrow_klass_base = _requested_static_archive_bottom; // runtime encoding base == runtime mapping start
986 // Note: use the "raw" version of encode that takes explicit narrow klass base and shift. Don't use any
987 // of the variants that do sanity checks, nor any of those that use the current - dump - JVM's encoding setting.
988 return CompressedKlassPointers::encode_not_null_without_asserts(requested_k, narrow_klass_base, narrow_klass_shift);
989 }
990 #endif // INCLUDE_CDS_JAVA_HEAP
991
992 // RelocateBufferToRequested --- Relocate all the pointers in rw/ro,
993 // so that the archive can be mapped to the "requested" location without runtime relocation.
994 //
995 // - See ArchiveBuilder header for the definition of "buffer", "mapped" and "requested"
996 // - ArchivePtrMarker::ptrmap() marks all the pointers in the rw/ro regions
997 // - Every pointer must have one of the following values:
998 // [a] nullptr:
999 // No relocation is needed. Remove this pointer from ptrmap so we don't need to
1000 // consider it at runtime.
1001 // [b] Points into an object X which is inside the buffer:
1002 // Adjust this pointer by _buffer_to_requested_delta, so it points to X
1003 // when the archive is mapped at the requested location.
1004 // [c] Points into an object Y which is inside mapped static archive:
1005 // - This happens only during dynamic dump
1006 // - Adjust this pointer by _mapped_to_requested_static_archive_delta,
1007 // so it points to Y when the static archive is mapped at the requested location.
1008 template <bool STATIC_DUMP>
1009 class RelocateBufferToRequested : public BitMapClosure {
1010 ArchiveBuilder* _builder;
1011 address _buffer_bottom;
1012 intx _buffer_to_requested_delta;
1013 intx _mapped_to_requested_static_archive_delta;
1014 size_t _max_non_null_offset;
1015
1016 public:
1017 RelocateBufferToRequested(ArchiveBuilder* builder) {
1018 _builder = builder;
1019 _buffer_bottom = _builder->buffer_bottom();
1020 _buffer_to_requested_delta = builder->buffer_to_requested_delta();
1021 _mapped_to_requested_static_archive_delta = builder->requested_static_archive_bottom() - builder->mapped_static_archive_bottom();
1022 _max_non_null_offset = 0;
1023
1024 address bottom = _builder->buffer_bottom();
1025 address top = _builder->buffer_top();
1026 address new_bottom = bottom + _buffer_to_requested_delta;
1027 address new_top = top + _buffer_to_requested_delta;
1028 log_debug(cds)("Relocating archive from [" INTPTR_FORMAT " - " INTPTR_FORMAT "] to "
1029 "[" INTPTR_FORMAT " - " INTPTR_FORMAT "]",
1030 p2i(bottom), p2i(top),
1031 p2i(new_bottom), p2i(new_top));
1032 }
1033
1034 bool do_bit(size_t offset) {
1035 address* p = (address*)_buffer_bottom + offset;
1036 assert(_builder->is_in_buffer_space(p), "pointer must live in buffer space");
1037
1038 if (*p == nullptr) {
1039 // todo -- clear bit, etc
1040 ArchivePtrMarker::ptrmap()->clear_bit(offset);
1041 } else {
1042 if (STATIC_DUMP) {
1043 assert(_builder->is_in_buffer_space(*p), "old pointer must point inside buffer space");
1044 *p += _buffer_to_requested_delta;
1045 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive");
1046 } else {
1047 if (_builder->is_in_buffer_space(*p)) {
1048 *p += _buffer_to_requested_delta;
1049 // assert is in requested dynamic archive
1050 } else {
1051 assert(_builder->is_in_mapped_static_archive(*p), "old pointer must point inside buffer space or mapped static archive");
1052 *p += _mapped_to_requested_static_archive_delta;
1053 assert(_builder->is_in_requested_static_archive(*p), "new pointer must point inside requested archive");
1054 }
1055 }
1056 _max_non_null_offset = offset;
1057 }
1058
1059 return true; // keep iterating
1060 }
1061
1062 void doit() {
1063 ArchivePtrMarker::ptrmap()->iterate(this);
1064 ArchivePtrMarker::compact(_max_non_null_offset);
1065 }
1066 };
1067
1068 #ifdef _LP64
1069 int ArchiveBuilder::precomputed_narrow_klass_shift() {
1070 // Legacy Mode:
1071 // We use 32 bits for narrowKlass, which should cover the full 4G Klass range. Shift can be 0.
1072 // CompactObjectHeader Mode:
1073 // narrowKlass is much smaller, and we use the highest possible shift value to later get the maximum
1074 // Klass encoding range.
1075 //
1076 // Note that all of this may change in the future, if we decide to correct the pre-calculated
1077 // narrow Klass IDs at archive load time.
1078 assert(UseCompressedClassPointers, "Only needed for compressed class pointers");
1079 return UseCompactObjectHeaders ? CompressedKlassPointers::max_shift() : 0;
1080 }
1081 #endif // _LP64
1082
1083 void ArchiveBuilder::relocate_to_requested() {
1084 ro_region()->pack();
1085
1086 size_t my_archive_size = buffer_top() - buffer_bottom();
1087
1088 if (CDSConfig::is_dumping_static_archive()) {
1089 _requested_static_archive_top = _requested_static_archive_bottom + my_archive_size;
1090 RelocateBufferToRequested<true> patcher(this);
1091 patcher.doit();
1092 } else {
1093 assert(CDSConfig::is_dumping_dynamic_archive(), "must be");
1094 _requested_dynamic_archive_top = _requested_dynamic_archive_bottom + my_archive_size;
1095 RelocateBufferToRequested<false> patcher(this);
1096 patcher.doit();
1097 }
1098 }
1099
1100 // Write detailed info to a mapfile to analyze contents of the archive.
1101 // static dump:
1102 // java -Xshare:dump -Xlog:cds+map=trace:file=cds.map:none:filesize=0
1103 // dynamic dump:
1104 // java -cp MyApp.jar -XX:ArchiveClassesAtExit=MyApp.jsa \
1105 // -Xlog:cds+map=trace:file=cds.map:none:filesize=0 MyApp
1106 //
1107 // We need to do some address translation because the buffers used at dump time may be mapped to
1108 // a different location at runtime. At dump time, the buffers may be at arbitrary locations
1109 // picked by the OS. At runtime, we try to map at a fixed location (SharedBaseAddress). For
1110 // consistency, we log everything using runtime addresses.
1111 class ArchiveBuilder::CDSMapLogger : AllStatic {
1112 static intx buffer_to_runtime_delta() {
1113 // Translate the buffers used by the RW/RO regions to their eventual (requested) locations
1114 // at runtime.
1115 return ArchiveBuilder::current()->buffer_to_requested_delta();
1116 }
1117
1118 // rw/ro regions only
1119 static void log_metaspace_region(const char* name, DumpRegion* region,
1120 const ArchiveBuilder::SourceObjList* src_objs) {
1121 address region_base = address(region->base());
1122 address region_top = address(region->top());
1123 log_region(name, region_base, region_top, region_base + buffer_to_runtime_delta());
1124 log_metaspace_objects(region, src_objs);
1125 }
1126
1127 #define _LOG_PREFIX PTR_FORMAT ": @@ %-17s %d"
1128
1129 static void log_klass(Klass* k, address runtime_dest, const char* type_name, int bytes, Thread* current) {
1130 ResourceMark rm(current);
1131 log_debug(cds, map)(_LOG_PREFIX " %s",
1132 p2i(runtime_dest), type_name, bytes, k->external_name());
1133 }
1134 static void log_method(Method* m, address runtime_dest, const char* type_name, int bytes, Thread* current) {
1135 ResourceMark rm(current);
1136 log_debug(cds, map)(_LOG_PREFIX " %s",
1137 p2i(runtime_dest), type_name, bytes, m->external_name());
1138 }
1139
1140 // rw/ro regions only
1141 static void log_metaspace_objects(DumpRegion* region, const ArchiveBuilder::SourceObjList* src_objs) {
1142 address last_obj_base = address(region->base());
1143 address last_obj_end = address(region->base());
1144 address region_end = address(region->end());
1145 Thread* current = Thread::current();
1146 for (int i = 0; i < src_objs->objs()->length(); i++) {
1147 SourceObjInfo* src_info = src_objs->at(i);
1148 address src = src_info->source_addr();
1149 address dest = src_info->buffered_addr();
1150 log_as_hex(last_obj_base, dest, last_obj_base + buffer_to_runtime_delta());
1151 address runtime_dest = dest + buffer_to_runtime_delta();
1152 int bytes = src_info->size_in_bytes();
1153
1154 MetaspaceObj::Type type = src_info->msotype();
1155 const char* type_name = MetaspaceObj::type_name(type);
1156
1157 switch (type) {
1158 case MetaspaceObj::ClassType:
1159 log_klass((Klass*)src, runtime_dest, type_name, bytes, current);
1160 break;
1161 case MetaspaceObj::ConstantPoolType:
1162 log_klass(((ConstantPool*)src)->pool_holder(),
1163 runtime_dest, type_name, bytes, current);
1164 break;
1165 case MetaspaceObj::ConstantPoolCacheType:
1166 log_klass(((ConstantPoolCache*)src)->constant_pool()->pool_holder(),
1167 runtime_dest, type_name, bytes, current);
1168 break;
1169 case MetaspaceObj::MethodType:
1170 log_method((Method*)src, runtime_dest, type_name, bytes, current);
1171 break;
1172 case MetaspaceObj::ConstMethodType:
1173 log_method(((ConstMethod*)src)->method(), runtime_dest, type_name, bytes, current);
1174 break;
1175 case MetaspaceObj::SymbolType:
1176 {
1177 ResourceMark rm(current);
1178 Symbol* s = (Symbol*)src;
1179 log_debug(cds, map)(_LOG_PREFIX " %s", p2i(runtime_dest), type_name, bytes,
1180 s->as_quoted_ascii());
1181 }
1182 break;
1183 default:
1184 log_debug(cds, map)(_LOG_PREFIX, p2i(runtime_dest), type_name, bytes);
1185 break;
1186 }
1187
1188 last_obj_base = dest;
1189 last_obj_end = dest + bytes;
1190 }
1191
1192 log_as_hex(last_obj_base, last_obj_end, last_obj_base + buffer_to_runtime_delta());
1193 if (last_obj_end < region_end) {
1194 log_debug(cds, map)(PTR_FORMAT ": @@ Misc data %zu bytes",
1195 p2i(last_obj_end + buffer_to_runtime_delta()),
1196 size_t(region_end - last_obj_end));
1197 log_as_hex(last_obj_end, region_end, last_obj_end + buffer_to_runtime_delta());
1198 }
1199 }
1200
1201 #undef _LOG_PREFIX
1202
1203 // Log information about a region, whose address at dump time is [base .. top). At
1204 // runtime, this region will be mapped to requested_base. requested_base is 0 if this
1205 // region will be mapped at os-selected addresses (such as the bitmap region), or will
1206 // be accessed with os::read (the header).
1207 //
1208 // Note: across -Xshare:dump runs, base may be different, but requested_base should
1209 // be the same as the archive contents should be deterministic.
1210 static void log_region(const char* name, address base, address top, address requested_base) {
1211 size_t size = top - base;
1212 base = requested_base;
1213 top = requested_base + size;
1214 log_info(cds, map)("[%-18s " PTR_FORMAT " - " PTR_FORMAT " %9zu bytes]",
1215 name, p2i(base), p2i(top), size);
1216 }
1217
1218 #if INCLUDE_CDS_JAVA_HEAP
1219 static void log_heap_region(ArchiveHeapInfo* heap_info) {
1220 MemRegion r = heap_info->buffer_region();
1221 address start = address(r.start()); // start of the current oop inside the buffer
1222 address end = address(r.end());
1223 log_region("heap", start, end, ArchiveHeapWriter::buffered_addr_to_requested_addr(start));
1224
1225 LogStreamHandle(Info, cds, map) st;
1226
1227 HeapRootSegments segments = heap_info->heap_root_segments();
1228 assert(segments.base_offset() == 0, "Sanity");
1229
1230 for (size_t seg_idx = 0; seg_idx < segments.count(); seg_idx++) {
1231 address requested_start = ArchiveHeapWriter::buffered_addr_to_requested_addr(start);
1232 st.print_cr(PTR_FORMAT ": Heap roots segment [%d]",
1233 p2i(requested_start), segments.size_in_elems(seg_idx));
1234 start += segments.size_in_bytes(seg_idx);
1235 }
1236 log_heap_roots();
1237
1238 while (start < end) {
1239 size_t byte_size;
1240 oop source_oop = ArchiveHeapWriter::buffered_addr_to_source_obj(start);
1241 address requested_start = ArchiveHeapWriter::buffered_addr_to_requested_addr(start);
1242 st.print(PTR_FORMAT ": @@ Object ", p2i(requested_start));
1243
1244 if (source_oop != nullptr) {
1245 // This is a regular oop that got archived.
1246 // Don't print the requested addr again as we have just printed it at the beginning of the line.
1247 // Example:
1248 // 0x00000007ffd27938: @@ Object (0xfffa4f27) java.util.HashMap
1249 print_oop_info_cr(&st, source_oop, /*print_requested_addr=*/false);
1250 byte_size = source_oop->size() * BytesPerWord;
1251 } else if ((byte_size = ArchiveHeapWriter::get_filler_size_at(start)) > 0) {
1252 // We have a filler oop, which also does not exist in BufferOffsetToSourceObjectTable.
1253 // Example:
1254 // 0x00000007ffc3ffd8: @@ Object filler 40 bytes
1255 st.print_cr("filler %zu bytes", byte_size);
1256 } else {
1257 ShouldNotReachHere();
1258 }
1259
1260 address oop_end = start + byte_size;
1261 log_as_hex(start, oop_end, requested_start, /*is_heap=*/true);
1262
1263 if (source_oop != nullptr) {
1264 log_oop_details(heap_info, source_oop, /*buffered_addr=*/start);
1265 }
1266 start = oop_end;
1267 }
1268 }
1269
1270 // ArchivedFieldPrinter is used to print the fields of archived objects. We can't
1271 // use _source_obj->print_on(), because we want to print the oop fields
1272 // in _source_obj with their requested addresses using print_oop_info_cr().
1273 class ArchivedFieldPrinter : public FieldClosure {
1274 ArchiveHeapInfo* _heap_info;
1275 outputStream* _st;
1276 oop _source_obj;
1277 address _buffered_addr;
1278 public:
1279 ArchivedFieldPrinter(ArchiveHeapInfo* heap_info, outputStream* st, oop src_obj, address buffered_addr) :
1280 _heap_info(heap_info), _st(st), _source_obj(src_obj), _buffered_addr(buffered_addr) {}
1281
1282 void do_field(fieldDescriptor* fd) {
1283 _st->print(" - ");
1284 BasicType ft = fd->field_type();
1285 switch (ft) {
1286 case T_ARRAY:
1287 case T_OBJECT:
1288 {
1289 fd->print_on(_st); // print just the name and offset
1290 oop obj = _source_obj->obj_field(fd->offset());
1291 if (java_lang_Class::is_instance(obj)) {
1292 obj = HeapShared::scratch_java_mirror(obj);
1293 }
1294 print_oop_info_cr(_st, obj);
1295 }
1296 break;
1297 default:
1298 if (ArchiveHeapWriter::is_marked_as_native_pointer(_heap_info, _source_obj, fd->offset())) {
1299 print_as_native_pointer(fd);
1300 } else {
1301 fd->print_on_for(_st, cast_to_oop(_buffered_addr)); // name, offset, value
1302 _st->cr();
1303 }
1304 }
1305 }
1306
1307 void print_as_native_pointer(fieldDescriptor* fd) {
1308 LP64_ONLY(assert(fd->field_type() == T_LONG, "must be"));
1309 NOT_LP64 (assert(fd->field_type() == T_INT, "must be"));
1310
1311 // We have a field that looks like an integer, but it's actually a pointer to a MetaspaceObj.
1312 address source_native_ptr = (address)
1313 LP64_ONLY(_source_obj->long_field(fd->offset()))
1314 NOT_LP64( _source_obj->int_field (fd->offset()));
1315 ArchiveBuilder* builder = ArchiveBuilder::current();
1316
1317 // The value of the native pointer at runtime.
1318 address requested_native_ptr = builder->to_requested(builder->get_buffered_addr(source_native_ptr));
1319
1320 // The address of _source_obj at runtime
1321 oop requested_obj = ArchiveHeapWriter::source_obj_to_requested_obj(_source_obj);
1322 // The address of this field in the requested space
1323 assert(requested_obj != nullptr, "Attempting to load field from null oop");
1324 address requested_field_addr = cast_from_oop<address>(requested_obj) + fd->offset();
1325
1326 fd->print_on(_st);
1327 _st->print_cr(PTR_FORMAT " (marked metadata pointer @" PTR_FORMAT " )",
1328 p2i(requested_native_ptr), p2i(requested_field_addr));
1329 }
1330 };
1331
1332 // Print the fields of instanceOops, or the elements of arrayOops
1333 static void log_oop_details(ArchiveHeapInfo* heap_info, oop source_oop, address buffered_addr) {
1334 LogStreamHandle(Trace, cds, map, oops) st;
1335 if (st.is_enabled()) {
1336 Klass* source_klass = source_oop->klass();
1337 ArchiveBuilder* builder = ArchiveBuilder::current();
1338 Klass* requested_klass = builder->to_requested(builder->get_buffered_addr(source_klass));
1339
1340 st.print(" - klass: ");
1341 source_klass->print_value_on(&st);
1342 st.print(" " PTR_FORMAT, p2i(requested_klass));
1343 st.cr();
1344
1345 if (source_oop->is_typeArray()) {
1346 TypeArrayKlass::cast(source_klass)->oop_print_elements_on(typeArrayOop(source_oop), &st);
1347 } else if (source_oop->is_objArray()) {
1348 objArrayOop source_obj_array = objArrayOop(source_oop);
1349 for (int i = 0; i < source_obj_array->length(); i++) {
1350 st.print(" -%4d: ", i);
1351 oop obj = source_obj_array->obj_at(i);
1352 if (java_lang_Class::is_instance(obj)) {
1353 obj = HeapShared::scratch_java_mirror(obj);
1354 }
1355 print_oop_info_cr(&st, obj);
1356 }
1357 } else {
1358 st.print_cr(" - fields (%zu words):", source_oop->size());
1359 ArchivedFieldPrinter print_field(heap_info, &st, source_oop, buffered_addr);
1360 InstanceKlass::cast(source_klass)->print_nonstatic_fields(&print_field);
1361
1362 if (java_lang_Class::is_instance(source_oop)) {
1363 oop scratch_mirror = source_oop;
1364 st.print(" - signature: ");
1365 print_class_signature_for_mirror(&st, scratch_mirror);
1366 st.cr();
1367
1368 Klass* src_klass = java_lang_Class::as_Klass(scratch_mirror);
1369 if (src_klass != nullptr && src_klass->is_instance_klass()) {
1370 oop rr = HeapShared::scratch_resolved_references(InstanceKlass::cast(src_klass)->constants());
1371 st.print(" - archived_resolved_references: ");
1372 print_oop_info_cr(&st, rr);
1373
1374 // We need to print the fields in the scratch_mirror, not the original mirror.
1375 // (if a class is not aot-initialized, static fields in its scratch mirror will be cleared).
1376 assert(scratch_mirror == HeapShared::scratch_java_mirror(src_klass->java_mirror()), "sanity");
1377 st.print_cr("- ---- static fields (%d):", java_lang_Class::static_oop_field_count(scratch_mirror));
1378 InstanceKlass::cast(src_klass)->do_local_static_fields(&print_field);
1379 }
1380 }
1381 }
1382 }
1383 }
1384
1385 static void print_class_signature_for_mirror(outputStream* st, oop scratch_mirror) {
1386 assert(java_lang_Class::is_instance(scratch_mirror), "sanity");
1387 if (java_lang_Class::is_primitive(scratch_mirror)) {
1388 for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
1389 BasicType bt = (BasicType)i;
1390 if (!is_reference_type(bt) && scratch_mirror == HeapShared::scratch_java_mirror(bt)) {
1391 oop orig_mirror = Universe::java_mirror(bt);
1392 java_lang_Class::print_signature(orig_mirror, st);
1393 return;
1394 }
1395 }
1396 ShouldNotReachHere();
1397 }
1398 java_lang_Class::print_signature(scratch_mirror, st);
1399 }
1400
1401 static void log_heap_roots() {
1402 LogStreamHandle(Trace, cds, map, oops) st;
1403 if (st.is_enabled()) {
1404 for (int i = 0; i < HeapShared::pending_roots()->length(); i++) {
1405 st.print("roots[%4d]: ", i);
1406 print_oop_info_cr(&st, HeapShared::pending_roots()->at(i));
1407 }
1408 }
1409 }
1410
1411 // Example output:
1412 // - The first number is the requested address (if print_requested_addr == true)
1413 // - The second number is the narrowOop version of the requested address (if UseCompressedOops == true)
1414 // 0x00000007ffc7e840 (0xfff8fd08) java.lang.Class Ljava/util/Array;
1415 // 0x00000007ffc000f8 (0xfff8001f) [B length: 11
1416 static void print_oop_info_cr(outputStream* st, oop source_oop, bool print_requested_addr = true) {
1417 if (source_oop == nullptr) {
1418 st->print_cr("null");
1419 } else {
1420 ResourceMark rm;
1421 oop requested_obj = ArchiveHeapWriter::source_obj_to_requested_obj(source_oop);
1422 if (print_requested_addr) {
1423 st->print(PTR_FORMAT " ", p2i(requested_obj));
1424 }
1425 if (UseCompressedOops) {
1426 st->print("(0x%08x) ", CompressedOops::narrow_oop_value(requested_obj));
1427 }
1428 if (source_oop->is_array()) {
1429 int array_len = arrayOop(source_oop)->length();
1430 st->print_cr("%s length: %d", source_oop->klass()->external_name(), array_len);
1431 } else {
1432 st->print("%s", source_oop->klass()->external_name());
1433
1434 if (java_lang_String::is_instance(source_oop)) {
1435 st->print(" ");
1436 java_lang_String::print(source_oop, st);
1437 } else if (java_lang_Class::is_instance(source_oop)) {
1438 oop scratch_mirror = source_oop;
1439
1440 st->print(" ");
1441 print_class_signature_for_mirror(st, scratch_mirror);
1442
1443 Klass* src_klass = java_lang_Class::as_Klass(scratch_mirror);
1444 if (src_klass != nullptr && src_klass->is_instance_klass()) {
1445 InstanceKlass* buffered_klass =
1446 ArchiveBuilder::current()->get_buffered_addr(InstanceKlass::cast(src_klass));
1447 if (buffered_klass->has_aot_initialized_mirror()) {
1448 st->print(" (aot-inited)");
1449 }
1450 }
1451 }
1452 st->cr();
1453 }
1454 }
1455 }
1456 #endif // INCLUDE_CDS_JAVA_HEAP
1457
1458 // Log all the data [base...top). Pretend that the base address
1459 // will be mapped to requested_base at run-time.
1460 static void log_as_hex(address base, address top, address requested_base, bool is_heap = false) {
1461 assert(top >= base, "must be");
1462
1463 LogStreamHandle(Trace, cds, map) lsh;
1464 if (lsh.is_enabled()) {
1465 int unitsize = sizeof(address);
1466 if (is_heap && UseCompressedOops) {
1467 // This makes the compressed oop pointers easier to read, but
1468 // longs and doubles will be split into two words.
1469 unitsize = sizeof(narrowOop);
1470 }
1471 os::print_hex_dump(&lsh, base, top, unitsize, /* print_ascii=*/true, /* bytes_per_line=*/32, requested_base);
1472 }
1473 }
1474
1475 static void log_header(FileMapInfo* mapinfo) {
1476 LogStreamHandle(Info, cds, map) lsh;
1477 if (lsh.is_enabled()) {
1478 mapinfo->print(&lsh);
1479 }
1480 }
1481
1482 public:
1483 static void log(ArchiveBuilder* builder, FileMapInfo* mapinfo,
1484 ArchiveHeapInfo* heap_info,
1485 char* bitmap, size_t bitmap_size_in_bytes) {
1486 log_info(cds, map)("%s CDS archive map for %s", CDSConfig::is_dumping_static_archive() ? "Static" : "Dynamic", mapinfo->full_path());
1487
1488 address header = address(mapinfo->header());
1489 address header_end = header + mapinfo->header()->header_size();
1490 log_region("header", header, header_end, nullptr);
1491 log_header(mapinfo);
1492 log_as_hex(header, header_end, nullptr);
1493
1494 DumpRegion* rw_region = &builder->_rw_region;
1495 DumpRegion* ro_region = &builder->_ro_region;
1496
1497 log_metaspace_region("rw region", rw_region, &builder->_rw_src_objs);
1498 log_metaspace_region("ro region", ro_region, &builder->_ro_src_objs);
1499
1500 address bitmap_end = address(bitmap + bitmap_size_in_bytes);
1501 log_region("bitmap", address(bitmap), bitmap_end, nullptr);
1502 log_as_hex((address)bitmap, bitmap_end, nullptr);
1503
1504 #if INCLUDE_CDS_JAVA_HEAP
1505 if (heap_info->is_used()) {
1506 log_heap_region(heap_info);
1507 }
1508 #endif
1509
1510 log_info(cds, map)("[End of CDS archive map]");
1511 }
1512 }; // end ArchiveBuilder::CDSMapLogger
1513
1514 void ArchiveBuilder::print_stats() {
1515 _alloc_stats.print_stats(int(_ro_region.used()), int(_rw_region.used()));
1516 }
1517
1518 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo, ArchiveHeapInfo* heap_info) {
1519 // Make sure NUM_CDS_REGIONS (exported in cds.h) agrees with
1520 // MetaspaceShared::n_regions (internal to hotspot).
1521 assert(NUM_CDS_REGIONS == MetaspaceShared::n_regions, "sanity");
1522
1523 write_region(mapinfo, MetaspaceShared::rw, &_rw_region, /*read_only=*/false,/*allow_exec=*/false);
1524 write_region(mapinfo, MetaspaceShared::ro, &_ro_region, /*read_only=*/true, /*allow_exec=*/false);
1525
1526 // Split pointer map into read-write and read-only bitmaps
1527 ArchivePtrMarker::initialize_rw_ro_maps(&_rw_ptrmap, &_ro_ptrmap);
1528
1529 size_t bitmap_size_in_bytes;
1530 char* bitmap = mapinfo->write_bitmap_region(ArchivePtrMarker::rw_ptrmap(), ArchivePtrMarker::ro_ptrmap(), heap_info,
1531 bitmap_size_in_bytes);
1532
1533 if (heap_info->is_used()) {
1534 _total_heap_region_size = mapinfo->write_heap_region(heap_info);
1535 }
1536
1537 print_region_stats(mapinfo, heap_info);
1538
1539 mapinfo->set_requested_base((char*)MetaspaceShared::requested_base_address());
1540 mapinfo->set_header_crc(mapinfo->compute_header_crc());
1541 // After this point, we should not write any data into mapinfo->header() since this
1542 // would corrupt its checksum we have calculated before.
1543 mapinfo->write_header();
1544 mapinfo->close();
1545
1546 if (log_is_enabled(Info, cds)) {
1547 log_info(cds)("Full module graph = %s", CDSConfig::is_dumping_full_module_graph() ? "enabled" : "disabled");
1548 print_stats();
1549 }
1550
1551 if (log_is_enabled(Info, cds, map)) {
1552 CDSMapLogger::log(this, mapinfo, heap_info,
1553 bitmap, bitmap_size_in_bytes);
1554 }
1555 CDS_JAVA_HEAP_ONLY(HeapShared::destroy_archived_object_cache());
1556 FREE_C_HEAP_ARRAY(char, bitmap);
1557 }
1558
1559 void ArchiveBuilder::write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region, bool read_only, bool allow_exec) {
1560 mapinfo->write_region(region_idx, dump_region->base(), dump_region->used(), read_only, allow_exec);
1561 }
1562
1563 void ArchiveBuilder::print_region_stats(FileMapInfo *mapinfo, ArchiveHeapInfo* heap_info) {
1564 // Print statistics of all the regions
1565 const size_t bitmap_used = mapinfo->region_at(MetaspaceShared::bm)->used();
1566 const size_t bitmap_reserved = mapinfo->region_at(MetaspaceShared::bm)->used_aligned();
1567 const size_t total_reserved = _ro_region.reserved() + _rw_region.reserved() +
1568 bitmap_reserved +
1569 _total_heap_region_size;
1570 const size_t total_bytes = _ro_region.used() + _rw_region.used() +
1571 bitmap_used +
1572 _total_heap_region_size;
1573 const double total_u_perc = percent_of(total_bytes, total_reserved);
1574
1575 _rw_region.print(total_reserved);
1576 _ro_region.print(total_reserved);
1577
1578 print_bitmap_region_stats(bitmap_used, total_reserved);
1579
1580 if (heap_info->is_used()) {
1581 print_heap_region_stats(heap_info, total_reserved);
1582 }
1583
1584 log_debug(cds)("total : %9zu [100.0%% of total] out of %9zu bytes [%5.1f%% used]",
1585 total_bytes, total_reserved, total_u_perc);
1586 }
1587
1588 void ArchiveBuilder::print_bitmap_region_stats(size_t size, size_t total_size) {
1589 log_debug(cds)("bm space: %9zu [ %4.1f%% of total] out of %9zu bytes [100.0%% used]",
1590 size, size/double(total_size)*100.0, size);
1591 }
1592
1593 void ArchiveBuilder::print_heap_region_stats(ArchiveHeapInfo *info, size_t total_size) {
1594 char* start = info->buffer_start();
1595 size_t size = info->buffer_byte_size();
1596 char* top = start + size;
1597 log_debug(cds)("hp space: %9zu [ %4.1f%% of total] out of %9zu bytes [100.0%% used] at " INTPTR_FORMAT,
1598 size, size/double(total_size)*100.0, size, p2i(start));
1599 }
1600
1601 void ArchiveBuilder::report_out_of_space(const char* name, size_t needed_bytes) {
1602 // This is highly unlikely to happen on 64-bits because we have reserved a 4GB space.
1603 // On 32-bit we reserve only 256MB so you could run out of space with 100,000 classes
1604 // or so.
1605 _rw_region.print_out_of_space_msg(name, needed_bytes);
1606 _ro_region.print_out_of_space_msg(name, needed_bytes);
1607
1608 log_error(cds)("Unable to allocate from '%s' region: Please reduce the number of shared classes.", name);
1609 MetaspaceShared::unrecoverable_writing_error();
1610 }