1 /*
2 * Copyright (c) 2012, 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/archiveBuilder.hpp"
27 #include "cds/archiveHeapLoader.hpp"
28 #include "cds/archiveHeapWriter.hpp"
29 #include "cds/cds_globals.hpp"
30 #include "cds/cdsConfig.hpp"
31 #include "cds/cdsProtectionDomain.hpp"
32 #include "cds/cds_globals.hpp"
33 #include "cds/classListParser.hpp"
34 #include "cds/classListWriter.hpp"
35 #include "cds/classPrelinker.hpp"
36 #include "cds/cppVtables.hpp"
37 #include "cds/dumpAllocStats.hpp"
38 #include "cds/dynamicArchive.hpp"
39 #include "cds/filemap.hpp"
40 #include "cds/heapShared.hpp"
41 #include "cds/lambdaFormInvokers.hpp"
42 #include "cds/metaspaceShared.hpp"
43 #include "classfile/classLoaderDataGraph.hpp"
44 #include "classfile/classLoaderDataShared.hpp"
45 #include "classfile/classLoaderExt.hpp"
46 #include "classfile/javaClasses.inline.hpp"
47 #include "classfile/loaderConstraints.hpp"
48 #include "classfile/modules.hpp"
49 #include "classfile/placeholders.hpp"
50 #include "classfile/stringTable.hpp"
51 #include "classfile/symbolTable.hpp"
52 #include "classfile/systemDictionary.hpp"
53 #include "classfile/systemDictionaryShared.hpp"
54 #include "classfile/vmClasses.hpp"
55 #include "classfile/vmSymbols.hpp"
56 #include "code/codeCache.hpp"
57 #include "gc/shared/gcVMOperations.hpp"
58 #include "interpreter/bytecodeStream.hpp"
59 #include "interpreter/bytecodes.hpp"
60 #include "jvm_io.h"
61 #include "logging/log.hpp"
62 #include "logging/logMessage.hpp"
63 #include "logging/logStream.hpp"
64 #include "memory/metaspace.hpp"
65 #include "memory/metaspaceClosure.hpp"
66 #include "memory/resourceArea.hpp"
67 #include "memory/universe.hpp"
68 #include "nmt/memTracker.hpp"
69 #include "oops/compressedKlass.hpp"
70 #include "oops/flatArrayKlass.hpp"
71 #include "oops/inlineKlass.hpp"
72 #include "oops/instanceMirrorKlass.hpp"
73 #include "oops/klass.inline.hpp"
74 #include "oops/objArrayOop.hpp"
75 #include "oops/oop.inline.hpp"
76 #include "oops/oopHandle.hpp"
77 #include "prims/jvmtiExport.hpp"
78 #include "runtime/arguments.hpp"
79 #include "runtime/globals.hpp"
80 #include "runtime/globals_extension.hpp"
81 #include "runtime/handles.inline.hpp"
82 #include "runtime/javaCalls.hpp"
83 #include "runtime/os.inline.hpp"
84 #include "runtime/safepointVerifiers.hpp"
85 #include "runtime/sharedRuntime.hpp"
86 #include "runtime/vmOperations.hpp"
87 #include "runtime/vmThread.hpp"
88 #include "sanitizers/leak.hpp"
89 #include "utilities/align.hpp"
90 #include "utilities/bitMap.inline.hpp"
91 #include "utilities/defaultStream.hpp"
92 #include "utilities/ostream.hpp"
93 #include "utilities/resourceHash.hpp"
94
95 ReservedSpace MetaspaceShared::_symbol_rs;
96 VirtualSpace MetaspaceShared::_symbol_vs;
97 bool MetaspaceShared::_archive_loading_failed = false;
98 bool MetaspaceShared::_remapped_readwrite = false;
99 void* MetaspaceShared::_shared_metaspace_static_top = nullptr;
100 intx MetaspaceShared::_relocation_delta;
101 char* MetaspaceShared::_requested_base_address;
102 bool MetaspaceShared::_use_optimized_module_handling = true;
103
104 // The CDS archive is divided into the following regions:
105 // rw - read-write metadata
106 // ro - read-only metadata and read-only tables
107 // hp - heap region
108 // bm - bitmap for relocating the above 7 regions.
109 //
110 // The rw and ro regions are linearly allocated, in the order of rw->ro.
111 // These regions are aligned with MetaspaceShared::core_region_alignment().
112 //
113 // These 2 regions are populated in the following steps:
114 // [0] All classes are loaded in MetaspaceShared::loadable_descriptors(). All metadata are
115 // temporarily allocated outside of the shared regions.
116 // [1] We enter a safepoint and allocate a buffer for the rw/ro regions.
117 // [2] C++ vtables are copied into the rw region.
118 // [3] ArchiveBuilder copies RW metadata into the rw region.
119 // [4] ArchiveBuilder copies RO metadata into the ro region.
120 // [5] SymbolTable, StringTable, SystemDictionary, and a few other read-only data
121 // are copied into the ro region as read-only tables.
122 //
123 // The heap region is populated by HeapShared::archive_objects.
124 //
125 // The bitmap region is used to relocate the ro/rw/hp regions.
126
127 static DumpRegion _symbol_region("symbols");
128
129 char* MetaspaceShared::symbol_space_alloc(size_t num_bytes) {
130 return _symbol_region.allocate(num_bytes);
131 }
132
133 // os::vm_allocation_granularity() is usually 4K for most OSes. However, some platforms
134 // such as linux-aarch64 and macos-x64 ...
135 // it can be either 4K or 64K and on macos-aarch64 it is 16K. To generate archives that are
136 // compatible for both settings, an alternative cds core region alignment can be enabled
137 // at building time:
138 // --enable-compactible-cds-alignment
139 // Upon successful configuration, the compactible alignment then can be defined in:
140 // os_linux_aarch64.cpp
141 // os_bsd_x86.cpp
142 size_t MetaspaceShared::core_region_alignment() {
143 return os::cds_core_region_alignment();
144 }
145
146 static bool shared_base_valid(char* shared_base) {
147 // We check user input for SharedBaseAddress at dump time. We must weed out values
148 // we already know to be invalid later.
149
150 // At CDS runtime, "shared_base" will be the (attempted) mapping start. It will also
151 // be the encoding base, since the the headers of archived base objects (and with Lilliput,
152 // the prototype mark words) carry pre-computed narrow Klass IDs that refer to the mapping
153 // start as base.
154 //
155 // Therefore, "shared_base" must be later usable as encoding base.
156 return AARCH64_ONLY(is_aligned(shared_base, 4 * G)) NOT_AARCH64(true);
157 }
158
159 class DumpClassListCLDClosure : public CLDClosure {
160 static const int INITIAL_TABLE_SIZE = 1987;
161 static const int MAX_TABLE_SIZE = 61333;
162
163 fileStream *_stream;
164 ResizeableResourceHashtable<InstanceKlass*, bool,
165 AnyObj::C_HEAP, mtClassShared> _dumped_classes;
166
167 void dump(InstanceKlass* ik) {
168 bool created;
169 _dumped_classes.put_if_absent(ik, &created);
170 if (!created) {
171 return;
172 }
173 if (_dumped_classes.maybe_grow()) {
174 log_info(cds, hashtables)("Expanded _dumped_classes table to %d", _dumped_classes.table_size());
175 }
176 if (ik->java_super()) {
177 dump(ik->java_super());
178 }
179 Array<InstanceKlass*>* interfaces = ik->local_interfaces();
180 int len = interfaces->length();
181 for (int i = 0; i < len; i++) {
182 dump(interfaces->at(i));
183 }
184 ClassListWriter::write_to_stream(ik, _stream);
185 }
186
187 public:
188 DumpClassListCLDClosure(fileStream* f)
189 : CLDClosure(), _dumped_classes(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE) {
190 _stream = f;
191 }
192
193 void do_cld(ClassLoaderData* cld) {
194 for (Klass* klass = cld->klasses(); klass != nullptr; klass = klass->next_link()) {
195 if (klass->is_instance_klass()) {
196 dump(InstanceKlass::cast(klass));
197 }
198 }
199 }
200 };
201
202 void MetaspaceShared::dump_loaded_classes(const char* file_name, TRAPS) {
203 fileStream stream(file_name, "w");
204 if (stream.is_open()) {
205 MutexLocker lock(ClassLoaderDataGraph_lock);
206 MutexLocker lock2(ClassListFile_lock, Mutex::_no_safepoint_check_flag);
207 DumpClassListCLDClosure collect_classes(&stream);
208 ClassLoaderDataGraph::loaded_cld_do(&collect_classes);
209 } else {
210 THROW_MSG(vmSymbols::java_io_IOException(), "Failed to open file");
211 }
212 }
213
214 static bool shared_base_too_high(char* specified_base, char* aligned_base, size_t cds_max) {
215 if (specified_base != nullptr && aligned_base < specified_base) {
216 // SharedBaseAddress is very high (e.g., 0xffffffffffffff00) so
217 // align_up(SharedBaseAddress, MetaspaceShared::core_region_alignment()) has wrapped around.
218 return true;
219 }
220 if (max_uintx - uintx(aligned_base) < uintx(cds_max)) {
221 // The end of the archive will wrap around
222 return true;
223 }
224
225 return false;
226 }
227
228 static char* compute_shared_base(size_t cds_max) {
229 char* specified_base = (char*)SharedBaseAddress;
230 char* aligned_base = align_up(specified_base, MetaspaceShared::core_region_alignment());
231 if (UseCompressedClassPointers) {
232 aligned_base = align_up(specified_base, Metaspace::reserve_alignment());
233 }
234
235 if (aligned_base != specified_base) {
236 log_info(cds)("SharedBaseAddress (" INTPTR_FORMAT ") aligned up to " INTPTR_FORMAT,
237 p2i(specified_base), p2i(aligned_base));
238 }
239
240 const char* err = nullptr;
241 if (shared_base_too_high(specified_base, aligned_base, cds_max)) {
242 err = "too high";
243 } else if (!shared_base_valid(aligned_base)) {
244 err = "invalid for this platform";
245 } else {
246 return aligned_base;
247 }
248
249 log_warning(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is %s. Reverted to " INTPTR_FORMAT,
250 p2i((void*)SharedBaseAddress), err,
251 p2i((void*)Arguments::default_SharedBaseAddress()));
252
253 specified_base = (char*)Arguments::default_SharedBaseAddress();
254 aligned_base = align_up(specified_base, MetaspaceShared::core_region_alignment());
255
256 // Make sure the default value of SharedBaseAddress specified in globals.hpp is sane.
257 assert(!shared_base_too_high(specified_base, aligned_base, cds_max), "Sanity");
258 assert(shared_base_valid(aligned_base), "Sanity");
259 return aligned_base;
260 }
261
262 void MetaspaceShared::initialize_for_static_dump() {
263 assert(CDSConfig::is_dumping_static_archive(), "sanity");
264 log_info(cds)("Core region alignment: " SIZE_FORMAT, core_region_alignment());
265 // The max allowed size for CDS archive. We use this to limit SharedBaseAddress
266 // to avoid address space wrap around.
267 size_t cds_max;
268 const size_t reserve_alignment = core_region_alignment();
269
270 #ifdef _LP64
271 const uint64_t UnscaledClassSpaceMax = (uint64_t(max_juint) + 1);
272 cds_max = align_down(UnscaledClassSpaceMax, reserve_alignment);
273 #else
274 // We don't support archives larger than 256MB on 32-bit due to limited
275 // virtual address space.
276 cds_max = align_down(256*M, reserve_alignment);
277 #endif
278
279 _requested_base_address = compute_shared_base(cds_max);
280 SharedBaseAddress = (size_t)_requested_base_address;
281
282 size_t symbol_rs_size = LP64_ONLY(3 * G) NOT_LP64(128 * M);
283 _symbol_rs = ReservedSpace(symbol_rs_size);
284 if (!_symbol_rs.is_reserved()) {
285 log_error(cds)("Unable to reserve memory for symbols: " SIZE_FORMAT " bytes.", symbol_rs_size);
286 MetaspaceShared::unrecoverable_writing_error();
287 }
288 _symbol_region.init(&_symbol_rs, &_symbol_vs);
289 }
290
291 // Called by universe_post_init()
292 void MetaspaceShared::post_initialize(TRAPS) {
293 if (CDSConfig::is_using_archive()) {
294 int size = FileMapInfo::get_number_of_shared_paths();
295 if (size > 0) {
296 CDSProtectionDomain::allocate_shared_data_arrays(size, CHECK);
297 if (!CDSConfig::is_dumping_dynamic_archive()) {
298 FileMapInfo* info;
299 if (FileMapInfo::dynamic_info() == nullptr) {
300 info = FileMapInfo::current_info();
301 } else {
302 info = FileMapInfo::dynamic_info();
303 }
304 ClassLoaderExt::init_paths_start_index(info->app_class_paths_start_index());
305 ClassLoaderExt::init_app_module_paths_start_index(info->app_module_paths_start_index());
306 ClassLoaderExt::init_num_module_paths(info->header()->num_module_paths());
307 }
308 }
309 }
310 }
311
312 static GrowableArrayCHeap<OopHandle, mtClassShared>* _extra_interned_strings = nullptr;
313 static GrowableArrayCHeap<Symbol*, mtClassShared>* _extra_symbols = nullptr;
314
315 void MetaspaceShared::read_extra_data(JavaThread* current, const char* filename) {
316 _extra_interned_strings = new GrowableArrayCHeap<OopHandle, mtClassShared>(10000);
317 _extra_symbols = new GrowableArrayCHeap<Symbol*, mtClassShared>(1000);
318
319 HashtableTextDump reader(filename);
320 reader.check_version("VERSION: 1.0");
321
322 while (reader.remain() > 0) {
323 int utf8_length;
324 int prefix_type = reader.scan_prefix(&utf8_length);
325 ResourceMark rm(current);
326 if (utf8_length == 0x7fffffff) {
327 // buf_len will overflown 32-bit value.
328 log_error(cds)("string length too large: %d", utf8_length);
329 MetaspaceShared::unrecoverable_loading_error();
330 }
331 int buf_len = utf8_length+1;
332 char* utf8_buffer = NEW_RESOURCE_ARRAY(char, buf_len);
333 reader.get_utf8(utf8_buffer, utf8_length);
334 utf8_buffer[utf8_length] = '\0';
335
336 if (prefix_type == HashtableTextDump::SymbolPrefix) {
337 _extra_symbols->append(SymbolTable::new_permanent_symbol(utf8_buffer));
338 } else{
339 assert(prefix_type == HashtableTextDump::StringPrefix, "Sanity");
340 ExceptionMark em(current);
341 JavaThread* THREAD = current; // For exception macros.
342 oop str = StringTable::intern(utf8_buffer, THREAD);
343
344 if (HAS_PENDING_EXCEPTION) {
345 log_warning(cds, heap)("[line %d] extra interned string allocation failed; size too large: %d",
346 reader.last_line_no(), utf8_length);
347 CLEAR_PENDING_EXCEPTION;
348 } else {
349 #if INCLUDE_CDS_JAVA_HEAP
350 if (ArchiveHeapWriter::is_string_too_large_to_archive(str)) {
351 log_warning(cds, heap)("[line %d] extra interned string ignored; size too large: %d",
352 reader.last_line_no(), utf8_length);
353 continue;
354 }
355 // Make sure this string is included in the dumped interned string table.
356 assert(str != nullptr, "must succeed");
357 _extra_interned_strings->append(OopHandle(Universe::vm_global(), str));
358 #endif
359 }
360 }
361 }
362 }
363
364 // Read/write a data stream for restoring/preserving metadata pointers and
365 // miscellaneous data from/to the shared archive file.
366
367 void MetaspaceShared::serialize(SerializeClosure* soc) {
368 int tag = 0;
369 soc->do_tag(--tag);
370
371 // Verify the sizes of various metadata in the system.
372 soc->do_tag(sizeof(Method));
373 soc->do_tag(sizeof(ConstMethod));
374 soc->do_tag(arrayOopDesc::base_offset_in_bytes(T_BYTE));
375 soc->do_tag(sizeof(ConstantPool));
376 soc->do_tag(sizeof(ConstantPoolCache));
377 soc->do_tag(objArrayOopDesc::base_offset_in_bytes());
378 soc->do_tag(typeArrayOopDesc::base_offset_in_bytes(T_BYTE));
379 soc->do_tag(sizeof(Symbol));
380
381 // Need to do this first, as subsequent steps may call virtual functions
382 // in archived Metadata objects.
383 CppVtables::serialize(soc);
384 soc->do_tag(--tag);
385
386 // Dump/restore miscellaneous metadata.
387 JavaClasses::serialize_offsets(soc);
388 Universe::serialize(soc);
389 soc->do_tag(--tag);
390
391 // Dump/restore references to commonly used names and signatures.
392 vmSymbols::serialize(soc);
393 soc->do_tag(--tag);
394
395 // Dump/restore the symbol/string/subgraph_info tables
396 SymbolTable::serialize_shared_table_header(soc);
397 StringTable::serialize_shared_table_header(soc);
398 HeapShared::serialize_tables(soc);
399 SystemDictionaryShared::serialize_dictionary_headers(soc);
400
401 InstanceMirrorKlass::serialize_offsets(soc);
402
403 // Dump/restore well known classes (pointers)
404 SystemDictionaryShared::serialize_vm_classes(soc);
405 soc->do_tag(--tag);
406
407 CDS_JAVA_HEAP_ONLY(Modules::serialize(soc);)
408 CDS_JAVA_HEAP_ONLY(Modules::serialize_addmods_names(soc);)
409 CDS_JAVA_HEAP_ONLY(ClassLoaderDataShared::serialize(soc);)
410
411 LambdaFormInvokers::serialize(soc);
412 soc->do_tag(666);
413 }
414
415 static void rewrite_nofast_bytecode(const methodHandle& method) {
416 BytecodeStream bcs(method);
417 while (!bcs.is_last_bytecode()) {
418 Bytecodes::Code opcode = bcs.next();
419 switch (opcode) {
420 case Bytecodes::_getfield: *bcs.bcp() = Bytecodes::_nofast_getfield; break;
421 case Bytecodes::_putfield: *bcs.bcp() = Bytecodes::_nofast_putfield; break;
422 case Bytecodes::_aload_0: *bcs.bcp() = Bytecodes::_nofast_aload_0; break;
423 case Bytecodes::_iload: {
424 if (!bcs.is_wide()) {
425 *bcs.bcp() = Bytecodes::_nofast_iload;
426 }
427 break;
428 }
429 default: break;
430 }
431 }
432 }
433
434 // [1] Rewrite all bytecodes as needed, so that the ConstMethod* will not be modified
435 // at run time by RewriteBytecodes/RewriteFrequentPairs
436 // [2] Assign a fingerprint, so one doesn't need to be assigned at run-time.
437 void MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread* thread, InstanceKlass* ik) {
438 for (int i = 0; i < ik->methods()->length(); i++) {
439 methodHandle m(thread, ik->methods()->at(i));
440 if (ik->can_be_verified_at_dumptime() && ik->is_linked()) {
441 rewrite_nofast_bytecode(m);
442 }
443 Fingerprinter fp(m);
444 // The side effect of this call sets method's fingerprint field.
445 fp.fingerprint();
446 }
447 }
448
449 class VM_PopulateDumpSharedSpace : public VM_Operation {
450 private:
451 ArchiveHeapInfo _heap_info;
452 FileMapInfo* _map_info;
453 StaticArchiveBuilder& _builder;
454
455 void dump_java_heap_objects(GrowableArray<Klass*>* klasses) NOT_CDS_JAVA_HEAP_RETURN;
456 void dump_shared_symbol_table(GrowableArray<Symbol*>* symbols) {
457 log_info(cds)("Dumping symbol table ...");
458 SymbolTable::write_to_archive(symbols);
459 }
460 char* dump_read_only_tables();
461
462 public:
463
464 VM_PopulateDumpSharedSpace(StaticArchiveBuilder& b) :
465 VM_Operation(), _heap_info(), _map_info(nullptr), _builder(b) {}
466
467 bool skip_operation() const { return false; }
468
469 VMOp_Type type() const { return VMOp_PopulateDumpSharedSpace; }
470 ArchiveHeapInfo* heap_info() { return &_heap_info; }
471 FileMapInfo* map_info() const { return _map_info; }
472 void doit(); // outline because gdb sucks
473 bool allow_nested_vm_operations() const { return true; }
474 }; // class VM_PopulateDumpSharedSpace
475
476 class StaticArchiveBuilder : public ArchiveBuilder {
477 public:
478 StaticArchiveBuilder() : ArchiveBuilder() {}
479
480 virtual void iterate_roots(MetaspaceClosure* it) {
481 FileMapInfo::metaspace_pointers_do(it);
482 SystemDictionaryShared::dumptime_classes_do(it);
483 Universe::metaspace_pointers_do(it);
484 vmSymbols::metaspace_pointers_do(it);
485
486 // The above code should find all the symbols that are referenced by the
487 // archived classes. We just need to add the extra symbols which
488 // may not be used by any of the archived classes -- these are usually
489 // symbols that we anticipate to be used at run time, so we can store
490 // them in the RO region, to be shared across multiple processes.
491 if (_extra_symbols != nullptr) {
492 for (int i = 0; i < _extra_symbols->length(); i++) {
493 it->push(_extra_symbols->adr_at(i));
494 }
495 }
496 }
497 };
498
499 char* VM_PopulateDumpSharedSpace::dump_read_only_tables() {
500 ArchiveBuilder::OtherROAllocMark mark;
501
502 SystemDictionaryShared::write_to_archive();
503
504 // Write lambform lines into archive
505 LambdaFormInvokers::dump_static_archive_invokers();
506 // Write module name into archive
507 CDS_JAVA_HEAP_ONLY(Modules::dump_main_module_name();)
508 // Write module names from --add-modules into archive
509 CDS_JAVA_HEAP_ONLY(Modules::dump_addmods_names();)
510 // Write the other data to the output array.
511 DumpRegion* ro_region = ArchiveBuilder::current()->ro_region();
512 char* start = ro_region->top();
513 WriteClosure wc(ro_region);
514 MetaspaceShared::serialize(&wc);
515
516 return start;
517 }
518
519 void VM_PopulateDumpSharedSpace::doit() {
520 guarantee(!CDSConfig::is_using_archive(), "We should not be using an archive when we dump");
521
522 DEBUG_ONLY(SystemDictionaryShared::NoClassLoadingMark nclm);
523
524 FileMapInfo::check_nonempty_dir_in_shared_path_table();
525
526 NOT_PRODUCT(SystemDictionary::verify();)
527
528 // Block concurrent class unloading from changing the _dumptime_table
529 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
530 SystemDictionaryShared::check_excluded_classes();
531
532 _builder.gather_source_objs();
533 _builder.reserve_buffer();
534
535 CppVtables::dumptime_init(&_builder);
536
537 _builder.sort_metadata_objs();
538 _builder.dump_rw_metadata();
539 _builder.dump_ro_metadata();
540 _builder.relocate_metaspaceobj_embedded_pointers();
541
542 dump_java_heap_objects(_builder.klasses());
543 dump_shared_symbol_table(_builder.symbols());
544
545 log_info(cds)("Make classes shareable");
546 _builder.make_klasses_shareable();
547
548 char* serialized_data = dump_read_only_tables();
549
550 SystemDictionaryShared::adjust_lambda_proxy_class_dictionary();
551
552 // The vtable clones contain addresses of the current process.
553 // We don't want to write these addresses into the archive.
554 CppVtables::zero_archived_vtables();
555
556 // Write the archive file
557 const char* static_archive = CDSConfig::static_archive_path();
558 assert(static_archive != nullptr, "SharedArchiveFile not set?");
559 _map_info = new FileMapInfo(static_archive, true);
560 _map_info->populate_header(MetaspaceShared::core_region_alignment());
561 _map_info->set_serialized_data(serialized_data);
562 _map_info->set_cloned_vtables(CppVtables::vtables_serialized_base());
563 }
564
565 class CollectCLDClosure : public CLDClosure {
566 GrowableArray<ClassLoaderData*> _loaded_cld;
567 GrowableArray<OopHandle> _loaded_cld_handles; // keep the CLDs alive
568 Thread* _current_thread;
569 public:
570 CollectCLDClosure(Thread* thread) : _current_thread(thread) {}
571 ~CollectCLDClosure() {
572 for (int i = 0; i < _loaded_cld_handles.length(); i++) {
573 _loaded_cld_handles.at(i).release(Universe::vm_global());
574 }
575 }
576 void do_cld(ClassLoaderData* cld) {
577 assert(cld->is_alive(), "must be");
578 _loaded_cld.append(cld);
579 _loaded_cld_handles.append(OopHandle(Universe::vm_global(), cld->holder()));
580 }
581
582 int nof_cld() const { return _loaded_cld.length(); }
583 ClassLoaderData* cld_at(int index) { return _loaded_cld.at(index); }
584 };
585
586 // Check if we can eagerly link this class at dump time, so we can avoid the
587 // runtime linking overhead (especially verification)
588 bool MetaspaceShared::may_be_eagerly_linked(InstanceKlass* ik) {
589 if (!ik->can_be_verified_at_dumptime()) {
590 // For old classes, try to leave them in the unlinked state, so
591 // we can still store them in the archive. They must be
592 // linked/verified at runtime.
593 return false;
594 }
595 if (CDSConfig::is_dumping_dynamic_archive() && ik->is_shared_unregistered_class()) {
596 // Linking of unregistered classes at this stage may cause more
597 // classes to be resolved, resulting in calls to ClassLoader.loadClass()
598 // that may not be expected by custom class loaders.
599 //
600 // It's OK to do this for the built-in loaders as we know they can
601 // tolerate this.
602 return false;
603 }
604 return true;
605 }
606
607 bool MetaspaceShared::link_class_for_cds(InstanceKlass* ik, TRAPS) {
608 // Link the class to cause the bytecodes to be rewritten and the
609 // cpcache to be created. Class verification is done according
610 // to -Xverify setting.
611 bool res = MetaspaceShared::try_link_class(THREAD, ik);
612 ClassPrelinker::dumptime_resolve_constants(ik, CHECK_(false));
613 return res;
614 }
615
616 void MetaspaceShared::link_shared_classes(bool jcmd_request, TRAPS) {
617 ClassPrelinker::initialize();
618
619 if (!jcmd_request) {
620 LambdaFormInvokers::regenerate_holder_classes(CHECK);
621 }
622
623 // Collect all loaded ClassLoaderData.
624 CollectCLDClosure collect_cld(THREAD);
625 {
626 // ClassLoaderDataGraph::loaded_cld_do requires ClassLoaderDataGraph_lock.
627 // We cannot link the classes while holding this lock (or else we may run into deadlock).
628 // Therefore, we need to first collect all the CLDs, and then link their classes after
629 // releasing the lock.
630 MutexLocker lock(ClassLoaderDataGraph_lock);
631 ClassLoaderDataGraph::loaded_cld_do(&collect_cld);
632 }
633
634 while (true) {
635 bool has_linked = false;
636 for (int i = 0; i < collect_cld.nof_cld(); i++) {
637 ClassLoaderData* cld = collect_cld.cld_at(i);
638 for (Klass* klass = cld->klasses(); klass != nullptr; klass = klass->next_link()) {
639 if (klass->is_instance_klass()) {
640 InstanceKlass* ik = InstanceKlass::cast(klass);
641 if (may_be_eagerly_linked(ik)) {
642 has_linked |= link_class_for_cds(ik, CHECK);
643 }
644 }
645 }
646 }
647
648 if (!has_linked) {
649 break;
650 }
651 // Class linking includes verification which may load more classes.
652 // Keep scanning until we have linked no more classes.
653 }
654 }
655
656 void MetaspaceShared::prepare_for_dumping() {
657 assert(CDSConfig::is_dumping_archive(), "sanity");
658 CDSConfig::check_unsupported_dumping_module_options();
659 ClassLoader::initialize_shared_path(JavaThread::current());
660 }
661
662 // Preload classes from a list, populate the shared spaces and dump to a
663 // file.
664 void MetaspaceShared::preload_and_dump(TRAPS) {
665 ResourceMark rm(THREAD);
666 StaticArchiveBuilder builder;
667 preload_and_dump_impl(builder, THREAD);
668 if (HAS_PENDING_EXCEPTION) {
669 if (PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())) {
670 log_error(cds)("Out of memory. Please run with a larger Java heap, current MaxHeapSize = "
671 SIZE_FORMAT "M", MaxHeapSize/M);
672 MetaspaceShared::writing_error();
673 } else {
674 log_error(cds)("%s: %s", PENDING_EXCEPTION->klass()->external_name(),
675 java_lang_String::as_utf8_string(java_lang_Throwable::message(PENDING_EXCEPTION)));
676 MetaspaceShared::writing_error("Unexpected exception, use -Xlog:cds,exceptions=trace for detail");
677 }
678 }
679 }
680
681 #if INCLUDE_CDS_JAVA_HEAP && defined(_LP64)
682 void MetaspaceShared::adjust_heap_sizes_for_dumping() {
683 if (!CDSConfig::is_dumping_heap() || UseCompressedOops) {
684 return;
685 }
686 // CDS heap dumping requires all string oops to have an offset
687 // from the heap bottom that can be encoded in 32-bit.
688 julong max_heap_size = (julong)(4 * G);
689
690 if (MinHeapSize > max_heap_size) {
691 log_debug(cds)("Setting MinHeapSize to 4G for CDS dumping, original size = " SIZE_FORMAT "M", MinHeapSize/M);
692 FLAG_SET_ERGO(MinHeapSize, max_heap_size);
693 }
694 if (InitialHeapSize > max_heap_size) {
695 log_debug(cds)("Setting InitialHeapSize to 4G for CDS dumping, original size = " SIZE_FORMAT "M", InitialHeapSize/M);
696 FLAG_SET_ERGO(InitialHeapSize, max_heap_size);
697 }
698 if (MaxHeapSize > max_heap_size) {
699 log_debug(cds)("Setting MaxHeapSize to 4G for CDS dumping, original size = " SIZE_FORMAT "M", MaxHeapSize/M);
700 FLAG_SET_ERGO(MaxHeapSize, max_heap_size);
701 }
702 }
703 #endif // INCLUDE_CDS_JAVA_HEAP && _LP64
704
705 void MetaspaceShared::get_default_classlist(char* default_classlist, const size_t buf_size) {
706 // Construct the path to the class list (in jre/lib)
707 // Walk up two directories from the location of the VM and
708 // optionally tack on "lib" (depending on platform)
709 os::jvm_path(default_classlist, (jint)(buf_size));
710 for (int i = 0; i < 3; i++) {
711 char *end = strrchr(default_classlist, *os::file_separator());
712 if (end != nullptr) *end = '\0';
713 }
714 size_t classlist_path_len = strlen(default_classlist);
715 if (classlist_path_len >= 3) {
716 if (strcmp(default_classlist + classlist_path_len - 3, "lib") != 0) {
717 if (classlist_path_len < buf_size - 4) {
718 jio_snprintf(default_classlist + classlist_path_len,
719 buf_size - classlist_path_len,
720 "%slib", os::file_separator());
721 classlist_path_len += 4;
722 }
723 }
724 }
725 if (classlist_path_len < buf_size - 10) {
726 jio_snprintf(default_classlist + classlist_path_len,
727 buf_size - classlist_path_len,
728 "%sclasslist", os::file_separator());
729 }
730 }
731
732 void MetaspaceShared::loadable_descriptors(TRAPS) {
733 char default_classlist[JVM_MAXPATHLEN];
734 const char* classlist_path;
735
736 get_default_classlist(default_classlist, sizeof(default_classlist));
737 if (SharedClassListFile == nullptr) {
738 classlist_path = default_classlist;
739 } else {
740 classlist_path = SharedClassListFile;
741 }
742
743 log_info(cds)("Loading classes to share ...");
744 ClassListParser::parse_classlist(classlist_path,
745 ClassListParser::_parse_all, CHECK);
746 if (ExtraSharedClassListFile) {
747 ClassListParser::parse_classlist(ExtraSharedClassListFile,
748 ClassListParser::_parse_all, CHECK);
749 }
750 if (classlist_path != default_classlist) {
751 struct stat statbuf;
752 if (os::stat(default_classlist, &statbuf) == 0) {
753 // File exists, let's use it.
754 ClassListParser::parse_classlist(default_classlist,
755 ClassListParser::_parse_lambda_forms_invokers_only, CHECK);
756 }
757 }
758
759 // Some classes are used at CDS runtime but are not loaded, and therefore archived, at
760 // dumptime. We can perform dummmy calls to these classes at dumptime to ensure they
761 // are archived.
762 exercise_runtime_cds_code(CHECK);
763
764 log_info(cds)("Loading classes to share: done.");
765 }
766
767 void MetaspaceShared::exercise_runtime_cds_code(TRAPS) {
768 // Exercise the manifest processing code
769 const char* dummy = "Manifest-Version: 1.0\n";
770 CDSProtectionDomain::create_jar_manifest(dummy, strlen(dummy), CHECK);
771
772 // Exercise FileSystem and URL code
773 CDSProtectionDomain::to_file_URL("dummy.jar", Handle(), CHECK);
774 }
775
776 void MetaspaceShared::preload_and_dump_impl(StaticArchiveBuilder& builder, TRAPS) {
777 loadable_descriptors(CHECK);
778
779 if (SharedArchiveConfigFile) {
780 log_info(cds)("Reading extra data from %s ...", SharedArchiveConfigFile);
781 read_extra_data(THREAD, SharedArchiveConfigFile);
782 log_info(cds)("Reading extra data: done.");
783 }
784
785 // Rewrite and link classes
786 log_info(cds)("Rewriting and linking classes ...");
787
788 // Link any classes which got missed. This would happen if we have loaded classes that
789 // were not explicitly specified in the classlist. E.g., if an interface implemented by class K
790 // fails verification, all other interfaces that were not specified in the classlist but
791 // are implemented by K are not verified.
792 link_shared_classes(false/*not from jcmd*/, CHECK);
793 log_info(cds)("Rewriting and linking classes: done");
794
795 #if INCLUDE_CDS_JAVA_HEAP
796 if (CDSConfig::is_dumping_heap()) {
797 if (!HeapShared::is_archived_boot_layer_available(THREAD)) {
798 log_info(cds)("archivedBootLayer not available, disabling full module graph");
799 CDSConfig::stop_dumping_full_module_graph();
800 }
801 HeapShared::init_for_dumping(CHECK);
802 ArchiveHeapWriter::init();
803 if (CDSConfig::is_dumping_full_module_graph()) {
804 HeapShared::reset_archived_object_states(CHECK);
805 }
806
807 // Do this at the very end, when no Java code will be executed. Otherwise
808 // some new strings may be added to the intern table.
809 StringTable::allocate_shared_strings_array(CHECK);
810 } else {
811 log_info(cds)("Not dumping heap, reset CDSConfig::_is_using_optimized_module_handling");
812 CDSConfig::stop_using_optimized_module_handling();
813 }
814 #endif
815
816 VM_PopulateDumpSharedSpace op(builder);
817 VMThread::execute(&op);
818
819 if (!write_static_archive(&builder, op.map_info(), op.heap_info())) {
820 THROW_MSG(vmSymbols::java_io_IOException(), "Encountered error while dumping");
821 }
822 }
823
824 bool MetaspaceShared::write_static_archive(ArchiveBuilder* builder, FileMapInfo* map_info, ArchiveHeapInfo* heap_info) {
825 // relocate the data so that it can be mapped to MetaspaceShared::requested_base_address()
826 // without runtime relocation.
827 builder->relocate_to_requested();
828
829 map_info->open_for_write();
830 if (!map_info->is_open()) {
831 return false;
832 }
833 builder->write_archive(map_info, heap_info);
834
835 if (AllowArchivingWithJavaAgent) {
836 log_warning(cds)("This archive was created with AllowArchivingWithJavaAgent. It should be used "
837 "for testing purposes only and should not be used in a production environment");
838 }
839 return true;
840 }
841
842 // Returns true if the class's status has changed.
843 bool MetaspaceShared::try_link_class(JavaThread* current, InstanceKlass* ik) {
844 ExceptionMark em(current);
845 JavaThread* THREAD = current; // For exception macros.
846 assert(CDSConfig::is_dumping_archive(), "sanity");
847 if (!ik->is_shared() && ik->is_loaded() && !ik->is_linked() && ik->can_be_verified_at_dumptime() &&
848 !SystemDictionaryShared::has_class_failed_verification(ik)) {
849 bool saved = BytecodeVerificationLocal;
850 if (ik->is_shared_unregistered_class() && ik->class_loader() == nullptr) {
851 // The verification decision is based on BytecodeVerificationRemote
852 // for non-system classes. Since we are using the null classloader
853 // to load non-system classes for customized class loaders during dumping,
854 // we need to temporarily change BytecodeVerificationLocal to be the same as
855 // BytecodeVerificationRemote. Note this can cause the parent system
856 // classes also being verified. The extra overhead is acceptable during
857 // dumping.
858 BytecodeVerificationLocal = BytecodeVerificationRemote;
859 }
860 ik->link_class(THREAD);
861 if (HAS_PENDING_EXCEPTION) {
862 ResourceMark rm(THREAD);
863 log_warning(cds)("Preload Warning: Verification failed for %s",
864 ik->external_name());
865 CLEAR_PENDING_EXCEPTION;
866 SystemDictionaryShared::set_class_has_failed_verification(ik);
867 }
868 ik->compute_has_loops_flag_for_methods();
869 BytecodeVerificationLocal = saved;
870 return true;
871 } else {
872 return false;
873 }
874 }
875
876 #if INCLUDE_CDS_JAVA_HEAP
877 void VM_PopulateDumpSharedSpace::dump_java_heap_objects(GrowableArray<Klass*>* klasses) {
878 if (CDSConfig::is_valhalla_preview()) {
879 log_info(cds)("Archived java heap is not yet supported with Valhalla preview");
880 return;
881 }
882 if(!HeapShared::can_write()) {
883 log_info(cds)(
884 "Archived java heap is not supported as UseG1GC "
885 "and UseCompressedClassPointers are required."
886 "Current settings: UseG1GC=%s, UseCompressedClassPointers=%s.",
887 BOOL_TO_STR(UseG1GC), BOOL_TO_STR(UseCompressedClassPointers));
888 return;
889 }
890 // Find all the interned strings that should be dumped.
891 int i;
892 for (i = 0; i < klasses->length(); i++) {
893 Klass* k = klasses->at(i);
894 if (k->is_instance_klass()) {
895 InstanceKlass* ik = InstanceKlass::cast(k);
896 if (ik->is_linked()) {
897 ik->constants()->add_dumped_interned_strings();
898 }
899 }
900 }
901 if (_extra_interned_strings != nullptr) {
902 for (i = 0; i < _extra_interned_strings->length(); i ++) {
903 OopHandle string = _extra_interned_strings->at(i);
904 HeapShared::add_to_dumped_interned_strings(string.resolve());
905 }
906 }
907
908 HeapShared::archive_objects(&_heap_info);
909 ArchiveBuilder::OtherROAllocMark mark;
910 HeapShared::write_subgraph_info_table();
911 }
912 #endif // INCLUDE_CDS_JAVA_HEAP
913
914 void MetaspaceShared::set_shared_metaspace_range(void* base, void *static_top, void* top) {
915 assert(base <= static_top && static_top <= top, "must be");
916 _shared_metaspace_static_top = static_top;
917 MetaspaceObj::set_shared_metaspace_range(base, top);
918 }
919
920 bool MetaspaceShared::is_shared_dynamic(void* p) {
921 if ((p < MetaspaceObj::shared_metaspace_top()) &&
922 (p >= _shared_metaspace_static_top)) {
923 return true;
924 } else {
925 return false;
926 }
927 }
928
929 bool MetaspaceShared::is_shared_static(void* p) {
930 if (is_in_shared_metaspace(p) && !is_shared_dynamic(p)) {
931 return true;
932 } else {
933 return false;
934 }
935 }
936
937 // This function is called when the JVM is unable to load the specified archive(s) due to one
938 // of the following conditions.
939 // - There's an error that indicates that the archive(s) files were corrupt or otherwise damaged.
940 // - When -XX:+RequireSharedSpaces is specified, AND the JVM cannot load the archive(s) due
941 // to version or classpath mismatch.
942 void MetaspaceShared::unrecoverable_loading_error(const char* message) {
943 log_error(cds)("An error has occurred while processing the shared archive file.");
944 if (message != nullptr) {
945 log_error(cds)("%s", message);
946 }
947 vm_exit_during_initialization("Unable to use shared archive.", nullptr);
948 }
949
950 // This function is called when the JVM is unable to write the specified CDS archive due to an
951 // unrecoverable error.
952 void MetaspaceShared::unrecoverable_writing_error(const char* message) {
953 writing_error(message);
954 vm_direct_exit(1);
955 }
956
957 // This function is called when the JVM is unable to write the specified CDS archive due to a
958 // an error. The error will be propagated
959 void MetaspaceShared::writing_error(const char* message) {
960 log_error(cds)("An error has occurred while writing the shared archive file.");
961 if (message != nullptr) {
962 log_error(cds)("%s", message);
963 }
964 }
965
966 void MetaspaceShared::initialize_runtime_shared_and_meta_spaces() {
967 assert(CDSConfig::is_using_archive(), "Must be called when UseSharedSpaces is enabled");
968 MapArchiveResult result = MAP_ARCHIVE_OTHER_FAILURE;
969
970 FileMapInfo* static_mapinfo = open_static_archive();
971 FileMapInfo* dynamic_mapinfo = nullptr;
972
973 if (static_mapinfo != nullptr) {
974 log_info(cds)("Core region alignment: " SIZE_FORMAT, static_mapinfo->core_region_alignment());
975 dynamic_mapinfo = open_dynamic_archive();
976
977 // First try to map at the requested address
978 result = map_archives(static_mapinfo, dynamic_mapinfo, true);
979 if (result == MAP_ARCHIVE_MMAP_FAILURE) {
980 // Mapping has failed (probably due to ASLR). Let's map at an address chosen
981 // by the OS.
982 log_info(cds)("Try to map archive(s) at an alternative address");
983 result = map_archives(static_mapinfo, dynamic_mapinfo, false);
984 }
985 }
986
987 if (result == MAP_ARCHIVE_SUCCESS) {
988 bool dynamic_mapped = (dynamic_mapinfo != nullptr && dynamic_mapinfo->is_mapped());
989 char* cds_base = static_mapinfo->mapped_base();
990 char* cds_end = dynamic_mapped ? dynamic_mapinfo->mapped_end() : static_mapinfo->mapped_end();
991 // Register CDS memory region with LSan.
992 LSAN_REGISTER_ROOT_REGION(cds_base, cds_end - cds_base);
993 set_shared_metaspace_range(cds_base, static_mapinfo->mapped_end(), cds_end);
994 _relocation_delta = static_mapinfo->relocation_delta();
995 _requested_base_address = static_mapinfo->requested_base_address();
996 if (dynamic_mapped) {
997 FileMapInfo::set_shared_path_table(dynamic_mapinfo);
998 // turn AutoCreateSharedArchive off if successfully mapped
999 AutoCreateSharedArchive = false;
1000 } else {
1001 FileMapInfo::set_shared_path_table(static_mapinfo);
1002 }
1003 } else {
1004 set_shared_metaspace_range(nullptr, nullptr, nullptr);
1005 if (CDSConfig::is_dumping_dynamic_archive()) {
1006 log_warning(cds)("-XX:ArchiveClassesAtExit is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info.");
1007 }
1008 UseSharedSpaces = false;
1009 // The base archive cannot be mapped. We cannot dump the dynamic shared archive.
1010 AutoCreateSharedArchive = false;
1011 CDSConfig::disable_dumping_dynamic_archive();
1012 log_info(cds)("Unable to map shared spaces");
1013 if (PrintSharedArchiveAndExit) {
1014 MetaspaceShared::unrecoverable_loading_error("Unable to use shared archive.");
1015 } else if (RequireSharedSpaces) {
1016 MetaspaceShared::unrecoverable_loading_error("Unable to map shared spaces");
1017 }
1018 }
1019
1020 // If mapping failed and -XShare:on, the vm should exit
1021 bool has_failed = false;
1022 if (static_mapinfo != nullptr && !static_mapinfo->is_mapped()) {
1023 has_failed = true;
1024 delete static_mapinfo;
1025 }
1026 if (dynamic_mapinfo != nullptr && !dynamic_mapinfo->is_mapped()) {
1027 has_failed = true;
1028 delete dynamic_mapinfo;
1029 }
1030 if (RequireSharedSpaces && has_failed) {
1031 MetaspaceShared::unrecoverable_loading_error("Unable to map shared spaces");
1032 }
1033 }
1034
1035 FileMapInfo* MetaspaceShared::open_static_archive() {
1036 const char* static_archive = CDSConfig::static_archive_path();
1037 assert(static_archive != nullptr, "sanity");
1038 FileMapInfo* mapinfo = new FileMapInfo(static_archive, true);
1039 if (!mapinfo->initialize()) {
1040 delete(mapinfo);
1041 return nullptr;
1042 }
1043 return mapinfo;
1044 }
1045
1046 FileMapInfo* MetaspaceShared::open_dynamic_archive() {
1047 if (CDSConfig::is_dumping_dynamic_archive()) {
1048 return nullptr;
1049 }
1050 const char* dynamic_archive = CDSConfig::dynamic_archive_path();
1051 if (dynamic_archive == nullptr) {
1052 return nullptr;
1053 }
1054
1055 FileMapInfo* mapinfo = new FileMapInfo(dynamic_archive, false);
1056 if (!mapinfo->initialize()) {
1057 delete(mapinfo);
1058 if (RequireSharedSpaces) {
1059 MetaspaceShared::unrecoverable_loading_error("Failed to initialize dynamic archive");
1060 }
1061 return nullptr;
1062 }
1063 return mapinfo;
1064 }
1065
1066 // use_requested_addr:
1067 // true = map at FileMapHeader::_requested_base_address
1068 // false = map at an alternative address picked by OS.
1069 MapArchiveResult MetaspaceShared::map_archives(FileMapInfo* static_mapinfo, FileMapInfo* dynamic_mapinfo,
1070 bool use_requested_addr) {
1071 if (use_requested_addr && static_mapinfo->requested_base_address() == nullptr) {
1072 log_info(cds)("Archive(s) were created with -XX:SharedBaseAddress=0. Always map at os-selected address.");
1073 return MAP_ARCHIVE_MMAP_FAILURE;
1074 }
1075
1076 PRODUCT_ONLY(if (ArchiveRelocationMode == 1 && use_requested_addr) {
1077 // For product build only -- this is for benchmarking the cost of doing relocation.
1078 // For debug builds, the check is done below, after reserving the space, for better test coverage
1079 // (see comment below).
1080 log_info(cds)("ArchiveRelocationMode == 1: always map archive(s) at an alternative address");
1081 return MAP_ARCHIVE_MMAP_FAILURE;
1082 });
1083
1084 if (ArchiveRelocationMode == 2 && !use_requested_addr) {
1085 log_info(cds)("ArchiveRelocationMode == 2: never map archive(s) at an alternative address");
1086 return MAP_ARCHIVE_MMAP_FAILURE;
1087 };
1088
1089 if (dynamic_mapinfo != nullptr) {
1090 // Ensure that the OS won't be able to allocate new memory spaces between the two
1091 // archives, or else it would mess up the simple comparison in MetaspaceObj::is_shared().
1092 assert(static_mapinfo->mapping_end_offset() == dynamic_mapinfo->mapping_base_offset(), "no gap");
1093 }
1094
1095 ReservedSpace total_space_rs, archive_space_rs, class_space_rs;
1096 MapArchiveResult result = MAP_ARCHIVE_OTHER_FAILURE;
1097 char* mapped_base_address = reserve_address_space_for_archives(static_mapinfo,
1098 dynamic_mapinfo,
1099 use_requested_addr,
1100 total_space_rs,
1101 archive_space_rs,
1102 class_space_rs);
1103 if (mapped_base_address == nullptr) {
1104 result = MAP_ARCHIVE_MMAP_FAILURE;
1105 log_debug(cds)("Failed to reserve spaces (use_requested_addr=%u)", (unsigned)use_requested_addr);
1106 } else {
1107
1108 #ifdef ASSERT
1109 // Some sanity checks after reserving address spaces for archives
1110 // and class space.
1111 assert(archive_space_rs.is_reserved(), "Sanity");
1112 if (Metaspace::using_class_space()) {
1113 // Class space must closely follow the archive space. Both spaces
1114 // must be aligned correctly.
1115 assert(class_space_rs.is_reserved(),
1116 "A class space should have been reserved");
1117 assert(class_space_rs.base() >= archive_space_rs.end(),
1118 "class space should follow the cds archive space");
1119 assert(is_aligned(archive_space_rs.base(),
1120 core_region_alignment()),
1121 "Archive space misaligned");
1122 assert(is_aligned(class_space_rs.base(),
1123 Metaspace::reserve_alignment()),
1124 "class space misaligned");
1125 }
1126 #endif // ASSERT
1127
1128 log_info(cds)("Reserved archive_space_rs [" INTPTR_FORMAT " - " INTPTR_FORMAT "] (" SIZE_FORMAT ") bytes",
1129 p2i(archive_space_rs.base()), p2i(archive_space_rs.end()), archive_space_rs.size());
1130 log_info(cds)("Reserved class_space_rs [" INTPTR_FORMAT " - " INTPTR_FORMAT "] (" SIZE_FORMAT ") bytes",
1131 p2i(class_space_rs.base()), p2i(class_space_rs.end()), class_space_rs.size());
1132
1133 if (MetaspaceShared::use_windows_memory_mapping()) {
1134 // We have now reserved address space for the archives, and will map in
1135 // the archive files into this space.
1136 //
1137 // Special handling for Windows: on Windows we cannot map a file view
1138 // into an existing memory mapping. So, we unmap the address range we
1139 // just reserved again, which will make it available for mapping the
1140 // archives.
1141 // Reserving this range has not been for naught however since it makes
1142 // us reasonably sure the address range is available.
1143 //
1144 // But still it may fail, since between unmapping the range and mapping
1145 // in the archive someone else may grab the address space. Therefore
1146 // there is a fallback in FileMap::map_region() where we just read in
1147 // the archive files sequentially instead of mapping it in. We couple
1148 // this with use_requested_addr, since we're going to patch all the
1149 // pointers anyway so there's no benefit to mmap.
1150 if (use_requested_addr) {
1151 assert(!total_space_rs.is_reserved(), "Should not be reserved for Windows");
1152 log_info(cds)("Windows mmap workaround: releasing archive space.");
1153 archive_space_rs.release();
1154 }
1155 }
1156 MapArchiveResult static_result = map_archive(static_mapinfo, mapped_base_address, archive_space_rs);
1157 MapArchiveResult dynamic_result = (static_result == MAP_ARCHIVE_SUCCESS) ?
1158 map_archive(dynamic_mapinfo, mapped_base_address, archive_space_rs) : MAP_ARCHIVE_OTHER_FAILURE;
1159
1160 DEBUG_ONLY(if (ArchiveRelocationMode == 1 && use_requested_addr) {
1161 // This is for simulating mmap failures at the requested address. In
1162 // debug builds, we do it here (after all archives have possibly been
1163 // mapped), so we can thoroughly test the code for failure handling
1164 // (releasing all allocated resource, etc).
1165 log_info(cds)("ArchiveRelocationMode == 1: always map archive(s) at an alternative address");
1166 if (static_result == MAP_ARCHIVE_SUCCESS) {
1167 static_result = MAP_ARCHIVE_MMAP_FAILURE;
1168 }
1169 if (dynamic_result == MAP_ARCHIVE_SUCCESS) {
1170 dynamic_result = MAP_ARCHIVE_MMAP_FAILURE;
1171 }
1172 });
1173
1174 if (static_result == MAP_ARCHIVE_SUCCESS) {
1175 if (dynamic_result == MAP_ARCHIVE_SUCCESS) {
1176 result = MAP_ARCHIVE_SUCCESS;
1177 } else if (dynamic_result == MAP_ARCHIVE_OTHER_FAILURE) {
1178 assert(dynamic_mapinfo != nullptr && !dynamic_mapinfo->is_mapped(), "must have failed");
1179 // No need to retry mapping the dynamic archive again, as it will never succeed
1180 // (bad file, etc) -- just keep the base archive.
1181 log_warning(cds, dynamic)("Unable to use shared archive. The top archive failed to load: %s",
1182 dynamic_mapinfo->full_path());
1183 result = MAP_ARCHIVE_SUCCESS;
1184 // TODO, we can give the unused space for the dynamic archive to class_space_rs, but there's no
1185 // easy API to do that right now.
1186 } else {
1187 result = MAP_ARCHIVE_MMAP_FAILURE;
1188 }
1189 } else if (static_result == MAP_ARCHIVE_OTHER_FAILURE) {
1190 result = MAP_ARCHIVE_OTHER_FAILURE;
1191 } else {
1192 result = MAP_ARCHIVE_MMAP_FAILURE;
1193 }
1194 }
1195
1196 if (result == MAP_ARCHIVE_SUCCESS) {
1197 SharedBaseAddress = (size_t)mapped_base_address;
1198 #ifdef _LP64
1199 if (Metaspace::using_class_space()) {
1200 // Set up ccs in metaspace.
1201 Metaspace::initialize_class_space(class_space_rs);
1202
1203 // Set up compressed Klass pointer encoding: the encoding range must
1204 // cover both archive and class space.
1205 address cds_base = (address)static_mapinfo->mapped_base();
1206 address ccs_end = (address)class_space_rs.end();
1207 assert(ccs_end > cds_base, "Sanity check");
1208 #if INCLUDE_CDS_JAVA_HEAP
1209 // We archived objects with pre-computed narrow Klass id. Set up encoding such that these Ids stay valid.
1210 address precomputed_narrow_klass_base = cds_base;
1211 const int precomputed_narrow_klass_shift = ArchiveHeapWriter::precomputed_narrow_klass_shift;
1212 CompressedKlassPointers::initialize_for_given_encoding(
1213 cds_base, ccs_end - cds_base, // Klass range
1214 precomputed_narrow_klass_base, precomputed_narrow_klass_shift // precomputed encoding, see ArchiveHeapWriter
1215 );
1216 #else
1217 CompressedKlassPointers::initialize (
1218 cds_base, ccs_end - cds_base // Klass range
1219 );
1220 #endif // INCLUDE_CDS_JAVA_HEAP
1221 // map_or_load_heap_region() compares the current narrow oop and klass encodings
1222 // with the archived ones, so it must be done after all encodings are determined.
1223 static_mapinfo->map_or_load_heap_region();
1224 }
1225 #endif // _LP64
1226 log_info(cds)("initial optimized module handling: %s", CDSConfig::is_using_optimized_module_handling() ? "enabled" : "disabled");
1227 log_info(cds)("initial full module graph: %s", CDSConfig::is_using_full_module_graph() ? "enabled" : "disabled");
1228 } else {
1229 unmap_archive(static_mapinfo);
1230 unmap_archive(dynamic_mapinfo);
1231 release_reserved_spaces(total_space_rs, archive_space_rs, class_space_rs);
1232 }
1233
1234 return result;
1235 }
1236
1237
1238 // This will reserve two address spaces suitable to house Klass structures, one
1239 // for the cds archives (static archive and optionally dynamic archive) and
1240 // optionally one move for ccs.
1241 //
1242 // Since both spaces must fall within the compressed class pointer encoding
1243 // range, they are allocated close to each other.
1244 //
1245 // Space for archives will be reserved first, followed by a potential gap,
1246 // followed by the space for ccs:
1247 //
1248 // +-- Base address A B End
1249 // | | | |
1250 // v v v v
1251 // +-------------+--------------+ +----------------------+
1252 // | static arc | [dyn. arch] | [gap] | compr. class space |
1253 // +-------------+--------------+ +----------------------+
1254 //
1255 // (The gap may result from different alignment requirements between metaspace
1256 // and CDS)
1257 //
1258 // If UseCompressedClassPointers is disabled, only one address space will be
1259 // reserved:
1260 //
1261 // +-- Base address End
1262 // | |
1263 // v v
1264 // +-------------+--------------+
1265 // | static arc | [dyn. arch] |
1266 // +-------------+--------------+
1267 //
1268 // Base address: If use_archive_base_addr address is true, the Base address is
1269 // determined by the address stored in the static archive. If
1270 // use_archive_base_addr address is false, this base address is determined
1271 // by the platform.
1272 //
1273 // If UseCompressedClassPointers=1, the range encompassing both spaces will be
1274 // suitable to en/decode narrow Klass pointers: the base will be valid for
1275 // encoding, the range [Base, End) not surpass KlassEncodingMetaspaceMax.
1276 //
1277 // Return:
1278 //
1279 // - On success:
1280 // - total_space_rs will be reserved as whole for archive_space_rs and
1281 // class_space_rs if UseCompressedClassPointers is true.
1282 // On Windows, try reserve archive_space_rs and class_space_rs
1283 // separately first if use_archive_base_addr is true.
1284 // - archive_space_rs will be reserved and large enough to host static and
1285 // if needed dynamic archive: [Base, A).
1286 // archive_space_rs.base and size will be aligned to CDS reserve
1287 // granularity.
1288 // - class_space_rs: If UseCompressedClassPointers=1, class_space_rs will
1289 // be reserved. Its start address will be aligned to metaspace reserve
1290 // alignment, which may differ from CDS alignment. It will follow the cds
1291 // archive space, close enough such that narrow class pointer encoding
1292 // covers both spaces.
1293 // If UseCompressedClassPointers=0, class_space_rs remains unreserved.
1294 // - On error: null is returned and the spaces remain unreserved.
1295 char* MetaspaceShared::reserve_address_space_for_archives(FileMapInfo* static_mapinfo,
1296 FileMapInfo* dynamic_mapinfo,
1297 bool use_archive_base_addr,
1298 ReservedSpace& total_space_rs,
1299 ReservedSpace& archive_space_rs,
1300 ReservedSpace& class_space_rs) {
1301
1302 address const base_address = (address) (use_archive_base_addr ? static_mapinfo->requested_base_address() : nullptr);
1303 const size_t archive_space_alignment = core_region_alignment();
1304
1305 // Size and requested location of the archive_space_rs (for both static and dynamic archives)
1306 assert(static_mapinfo->mapping_base_offset() == 0, "Must be");
1307 size_t archive_end_offset = (dynamic_mapinfo == nullptr) ? static_mapinfo->mapping_end_offset() : dynamic_mapinfo->mapping_end_offset();
1308 size_t archive_space_size = align_up(archive_end_offset, archive_space_alignment);
1309
1310 if (!Metaspace::using_class_space()) {
1311 // Get the simple case out of the way first:
1312 // no compressed class space, simple allocation.
1313
1314 // When running without class space, requested archive base should be aligned to cds core alignment.
1315 assert(is_aligned(base_address, archive_space_alignment),
1316 "Archive base address unaligned: " PTR_FORMAT ", needs alignment: %zu.",
1317 p2i(base_address), archive_space_alignment);
1318
1319 archive_space_rs = ReservedSpace(archive_space_size, archive_space_alignment,
1320 os::vm_page_size(), (char*)base_address);
1321 if (archive_space_rs.is_reserved()) {
1322 assert(base_address == nullptr ||
1323 (address)archive_space_rs.base() == base_address, "Sanity");
1324 // Register archive space with NMT.
1325 MemTracker::record_virtual_memory_tag(archive_space_rs.base(), mtClassShared);
1326 return archive_space_rs.base();
1327 }
1328 return nullptr;
1329 }
1330
1331 #ifdef _LP64
1332
1333 // Complex case: two spaces adjacent to each other, both to be addressable
1334 // with narrow class pointers.
1335 // We reserve the whole range spanning both spaces, then split that range up.
1336
1337 const size_t class_space_alignment = Metaspace::reserve_alignment();
1338
1339 // When running with class space, requested archive base must satisfy both cds core alignment
1340 // and class space alignment.
1341 const size_t base_address_alignment = MAX2(class_space_alignment, archive_space_alignment);
1342 assert(is_aligned(base_address, base_address_alignment),
1343 "Archive base address unaligned: " PTR_FORMAT ", needs alignment: %zu.",
1344 p2i(base_address), base_address_alignment);
1345
1346 size_t class_space_size = CompressedClassSpaceSize;
1347 assert(CompressedClassSpaceSize > 0 &&
1348 is_aligned(CompressedClassSpaceSize, class_space_alignment),
1349 "CompressedClassSpaceSize malformed: "
1350 SIZE_FORMAT, CompressedClassSpaceSize);
1351
1352 const size_t ccs_begin_offset = align_up(archive_space_size, class_space_alignment);
1353 const size_t gap_size = ccs_begin_offset - archive_space_size;
1354
1355 // Reduce class space size if it would not fit into the Klass encoding range
1356 constexpr size_t max_encoding_range_size = 4 * G;
1357 guarantee(archive_space_size < max_encoding_range_size - class_space_alignment, "Archive too large");
1358 if ((archive_space_size + gap_size + class_space_size) > max_encoding_range_size) {
1359 class_space_size = align_down(max_encoding_range_size - archive_space_size - gap_size, class_space_alignment);
1360 log_info(metaspace)("CDS initialization: reducing class space size from " SIZE_FORMAT " to " SIZE_FORMAT,
1361 CompressedClassSpaceSize, class_space_size);
1362 FLAG_SET_ERGO(CompressedClassSpaceSize, class_space_size);
1363 }
1364
1365 const size_t total_range_size =
1366 archive_space_size + gap_size + class_space_size;
1367
1368 assert(total_range_size > ccs_begin_offset, "must be");
1369 if (use_windows_memory_mapping() && use_archive_base_addr) {
1370 if (base_address != nullptr) {
1371 // On Windows, we cannot safely split a reserved memory space into two (see JDK-8255917).
1372 // Hence, we optimistically reserve archive space and class space side-by-side. We only
1373 // do this for use_archive_base_addr=true since for use_archive_base_addr=false case
1374 // caller will not split the combined space for mapping, instead read the archive data
1375 // via sequential file IO.
1376 address ccs_base = base_address + archive_space_size + gap_size;
1377 archive_space_rs = ReservedSpace(archive_space_size, archive_space_alignment,
1378 os::vm_page_size(), (char*)base_address);
1379 class_space_rs = ReservedSpace(class_space_size, class_space_alignment,
1380 os::vm_page_size(), (char*)ccs_base);
1381 }
1382 if (!archive_space_rs.is_reserved() || !class_space_rs.is_reserved()) {
1383 release_reserved_spaces(total_space_rs, archive_space_rs, class_space_rs);
1384 return nullptr;
1385 }
1386 // NMT: fix up the space tags
1387 MemTracker::record_virtual_memory_tag(archive_space_rs.base(), mtClassShared);
1388 MemTracker::record_virtual_memory_tag(class_space_rs.base(), mtClass);
1389 } else {
1390 if (use_archive_base_addr && base_address != nullptr) {
1391 total_space_rs = ReservedSpace(total_range_size, base_address_alignment,
1392 os::vm_page_size(), (char*) base_address);
1393 } else {
1394 // We did not manage to reserve at the preferred address, or were instructed to relocate. In that
1395 // case we reserve wherever possible, but the start address needs to be encodable as narrow Klass
1396 // encoding base since the archived heap objects contain nKlass IDs pre-calculated toward the start
1397 // of the shared Metaspace. That prevents us from using zero-based encoding and therefore we won't
1398 // try allocating in low-address regions.
1399 total_space_rs = Metaspace::reserve_address_space_for_compressed_classes(total_range_size, false /* optimize_for_zero_base */);
1400 }
1401
1402 if (!total_space_rs.is_reserved()) {
1403 return nullptr;
1404 }
1405
1406 // Paranoid checks:
1407 assert(base_address == nullptr || (address)total_space_rs.base() == base_address,
1408 "Sanity (" PTR_FORMAT " vs " PTR_FORMAT ")", p2i(base_address), p2i(total_space_rs.base()));
1409 assert(is_aligned(total_space_rs.base(), base_address_alignment), "Sanity");
1410 assert(total_space_rs.size() == total_range_size, "Sanity");
1411
1412 // Now split up the space into ccs and cds archive. For simplicity, just leave
1413 // the gap reserved at the end of the archive space. Do not do real splitting.
1414 archive_space_rs = total_space_rs.first_part(ccs_begin_offset,
1415 (size_t)archive_space_alignment);
1416 class_space_rs = total_space_rs.last_part(ccs_begin_offset);
1417 MemTracker::record_virtual_memory_split_reserved(total_space_rs.base(), total_space_rs.size(),
1418 ccs_begin_offset, mtClassShared, mtClass);
1419 }
1420 assert(is_aligned(archive_space_rs.base(), archive_space_alignment), "Sanity");
1421 assert(is_aligned(archive_space_rs.size(), archive_space_alignment), "Sanity");
1422 assert(is_aligned(class_space_rs.base(), class_space_alignment), "Sanity");
1423 assert(is_aligned(class_space_rs.size(), class_space_alignment), "Sanity");
1424
1425
1426 return archive_space_rs.base();
1427
1428 #else
1429 ShouldNotReachHere();
1430 return nullptr;
1431 #endif
1432
1433 }
1434
1435 void MetaspaceShared::release_reserved_spaces(ReservedSpace& total_space_rs,
1436 ReservedSpace& archive_space_rs,
1437 ReservedSpace& class_space_rs) {
1438 if (total_space_rs.is_reserved()) {
1439 log_debug(cds)("Released shared space (archive + class) " INTPTR_FORMAT, p2i(total_space_rs.base()));
1440 total_space_rs.release();
1441 } else {
1442 if (archive_space_rs.is_reserved()) {
1443 log_debug(cds)("Released shared space (archive) " INTPTR_FORMAT, p2i(archive_space_rs.base()));
1444 archive_space_rs.release();
1445 }
1446 if (class_space_rs.is_reserved()) {
1447 log_debug(cds)("Released shared space (classes) " INTPTR_FORMAT, p2i(class_space_rs.base()));
1448 class_space_rs.release();
1449 }
1450 }
1451 }
1452
1453 static int archive_regions[] = { MetaspaceShared::rw, MetaspaceShared::ro };
1454 static int archive_regions_count = 2;
1455
1456 MapArchiveResult MetaspaceShared::map_archive(FileMapInfo* mapinfo, char* mapped_base_address, ReservedSpace rs) {
1457 assert(CDSConfig::is_using_archive(), "must be runtime");
1458 if (mapinfo == nullptr) {
1459 return MAP_ARCHIVE_SUCCESS; // The dynamic archive has not been specified. No error has happened -- trivially succeeded.
1460 }
1461
1462 mapinfo->set_is_mapped(false);
1463 if (mapinfo->core_region_alignment() != (size_t)core_region_alignment()) {
1464 log_info(cds)("Unable to map CDS archive -- core_region_alignment() expected: " SIZE_FORMAT
1465 " actual: " SIZE_FORMAT, mapinfo->core_region_alignment(), core_region_alignment());
1466 return MAP_ARCHIVE_OTHER_FAILURE;
1467 }
1468
1469 MapArchiveResult result =
1470 mapinfo->map_regions(archive_regions, archive_regions_count, mapped_base_address, rs);
1471
1472 if (result != MAP_ARCHIVE_SUCCESS) {
1473 unmap_archive(mapinfo);
1474 return result;
1475 }
1476
1477 if (!mapinfo->validate_shared_path_table()) {
1478 unmap_archive(mapinfo);
1479 return MAP_ARCHIVE_OTHER_FAILURE;
1480 }
1481
1482 mapinfo->set_is_mapped(true);
1483 return MAP_ARCHIVE_SUCCESS;
1484 }
1485
1486 void MetaspaceShared::unmap_archive(FileMapInfo* mapinfo) {
1487 assert(CDSConfig::is_using_archive(), "must be runtime");
1488 if (mapinfo != nullptr) {
1489 mapinfo->unmap_regions(archive_regions, archive_regions_count);
1490 mapinfo->unmap_region(MetaspaceShared::bm);
1491 mapinfo->set_is_mapped(false);
1492 }
1493 }
1494
1495 // For -XX:PrintSharedArchiveAndExit
1496 class CountSharedSymbols : public SymbolClosure {
1497 private:
1498 int _count;
1499 public:
1500 CountSharedSymbols() : _count(0) {}
1501 void do_symbol(Symbol** sym) {
1502 _count++;
1503 }
1504 int total() { return _count; }
1505
1506 };
1507
1508 // Read the miscellaneous data from the shared file, and
1509 // serialize it out to its various destinations.
1510
1511 void MetaspaceShared::initialize_shared_spaces() {
1512 FileMapInfo *static_mapinfo = FileMapInfo::current_info();
1513
1514 // Verify various attributes of the archive, plus initialize the
1515 // shared string/symbol tables.
1516 char* buffer = static_mapinfo->serialized_data();
1517 intptr_t* array = (intptr_t*)buffer;
1518 ReadClosure rc(&array);
1519 serialize(&rc);
1520
1521 // Finish up archived heap initialization. These must be
1522 // done after ReadClosure.
1523 static_mapinfo->patch_heap_embedded_pointers();
1524 ArchiveHeapLoader::finish_initialization();
1525 Universe::load_archived_object_instances();
1526
1527 // Close the mapinfo file
1528 static_mapinfo->close();
1529
1530 static_mapinfo->unmap_region(MetaspaceShared::bm);
1531
1532 FileMapInfo *dynamic_mapinfo = FileMapInfo::dynamic_info();
1533 if (dynamic_mapinfo != nullptr) {
1534 intptr_t* buffer = (intptr_t*)dynamic_mapinfo->serialized_data();
1535 ReadClosure rc(&buffer);
1536 ArchiveBuilder::serialize_dynamic_archivable_items(&rc);
1537 DynamicArchive::setup_array_klasses();
1538 dynamic_mapinfo->close();
1539 dynamic_mapinfo->unmap_region(MetaspaceShared::bm);
1540 }
1541
1542 // Set up LambdaFormInvokers::_lambdaform_lines for dynamic dump
1543 if (CDSConfig::is_dumping_dynamic_archive()) {
1544 // Read stored LF format lines stored in static archive
1545 LambdaFormInvokers::read_static_archive_invokers();
1546 }
1547
1548 if (PrintSharedArchiveAndExit) {
1549 // Print archive names
1550 if (dynamic_mapinfo != nullptr) {
1551 tty->print_cr("\n\nBase archive name: %s", CDSConfig::static_archive_path());
1552 tty->print_cr("Base archive version %d", static_mapinfo->version());
1553 } else {
1554 tty->print_cr("Static archive name: %s", static_mapinfo->full_path());
1555 tty->print_cr("Static archive version %d", static_mapinfo->version());
1556 }
1557
1558 SystemDictionaryShared::print_shared_archive(tty);
1559 if (dynamic_mapinfo != nullptr) {
1560 tty->print_cr("\n\nDynamic archive name: %s", dynamic_mapinfo->full_path());
1561 tty->print_cr("Dynamic archive version %d", dynamic_mapinfo->version());
1562 SystemDictionaryShared::print_shared_archive(tty, false/*dynamic*/);
1563 }
1564
1565 // collect shared symbols and strings
1566 CountSharedSymbols cl;
1567 SymbolTable::shared_symbols_do(&cl);
1568 tty->print_cr("Number of shared symbols: %d", cl.total());
1569 tty->print_cr("Number of shared strings: %zu", StringTable::shared_entry_count());
1570 tty->print_cr("VM version: %s\r\n", static_mapinfo->vm_version());
1571 if (FileMapInfo::current_info() == nullptr || _archive_loading_failed) {
1572 tty->print_cr("archive is invalid");
1573 vm_exit(1);
1574 } else {
1575 tty->print_cr("archive is valid");
1576 vm_exit(0);
1577 }
1578 }
1579 }
1580
1581 // JVM/TI RedefineClasses() support:
1582 bool MetaspaceShared::remap_shared_readonly_as_readwrite() {
1583 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
1584
1585 if (CDSConfig::is_using_archive()) {
1586 // remap the shared readonly space to shared readwrite, private
1587 FileMapInfo* mapinfo = FileMapInfo::current_info();
1588 if (!mapinfo->remap_shared_readonly_as_readwrite()) {
1589 return false;
1590 }
1591 if (FileMapInfo::dynamic_info() != nullptr) {
1592 mapinfo = FileMapInfo::dynamic_info();
1593 if (!mapinfo->remap_shared_readonly_as_readwrite()) {
1594 return false;
1595 }
1596 }
1597 _remapped_readwrite = true;
1598 }
1599 return true;
1600 }
1601
1602 void MetaspaceShared::print_on(outputStream* st) {
1603 if (CDSConfig::is_using_archive()) {
1604 st->print("CDS archive(s) mapped at: ");
1605 address base = (address)MetaspaceObj::shared_metaspace_base();
1606 address static_top = (address)_shared_metaspace_static_top;
1607 address top = (address)MetaspaceObj::shared_metaspace_top();
1608 st->print("[" PTR_FORMAT "-" PTR_FORMAT "-" PTR_FORMAT "), ", p2i(base), p2i(static_top), p2i(top));
1609 st->print("size " SIZE_FORMAT ", ", top - base);
1610 st->print("SharedBaseAddress: " PTR_FORMAT ", ArchiveRelocationMode: %d.", SharedBaseAddress, ArchiveRelocationMode);
1611 } else {
1612 st->print("CDS archive(s) not mapped");
1613 }
1614 st->cr();
1615 }