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(ClassLoaderDataShared::serialize(soc);)
409
410 LambdaFormInvokers::serialize(soc);
411 soc->do_tag(666);
412 }
413
414 static void rewrite_nofast_bytecode(const methodHandle& method) {
415 BytecodeStream bcs(method);
416 while (!bcs.is_last_bytecode()) {
417 Bytecodes::Code opcode = bcs.next();
418 switch (opcode) {
419 case Bytecodes::_getfield: *bcs.bcp() = Bytecodes::_nofast_getfield; break;
420 case Bytecodes::_putfield: *bcs.bcp() = Bytecodes::_nofast_putfield; break;
421 case Bytecodes::_aload_0: *bcs.bcp() = Bytecodes::_nofast_aload_0; break;
422 case Bytecodes::_iload: {
423 if (!bcs.is_wide()) {
424 *bcs.bcp() = Bytecodes::_nofast_iload;
425 }
426 break;
427 }
428 default: break;
429 }
430 }
431 }
432
433 // [1] Rewrite all bytecodes as needed, so that the ConstMethod* will not be modified
434 // at run time by RewriteBytecodes/RewriteFrequentPairs
435 // [2] Assign a fingerprint, so one doesn't need to be assigned at run-time.
436 void MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread* thread, InstanceKlass* ik) {
437 for (int i = 0; i < ik->methods()->length(); i++) {
438 methodHandle m(thread, ik->methods()->at(i));
439 if (ik->can_be_verified_at_dumptime() && ik->is_linked()) {
440 rewrite_nofast_bytecode(m);
441 }
442 Fingerprinter fp(m);
443 // The side effect of this call sets method's fingerprint field.
444 fp.fingerprint();
445 }
446 }
447
448 class VM_PopulateDumpSharedSpace : public VM_Operation {
449 private:
450 ArchiveHeapInfo _heap_info;
451 FileMapInfo* _map_info;
452 StaticArchiveBuilder& _builder;
453
454 void dump_java_heap_objects(GrowableArray<Klass*>* klasses) NOT_CDS_JAVA_HEAP_RETURN;
455 void dump_shared_symbol_table(GrowableArray<Symbol*>* symbols) {
456 log_info(cds)("Dumping symbol table ...");
457 SymbolTable::write_to_archive(symbols);
458 }
459 char* dump_read_only_tables();
460
461 public:
462
463 VM_PopulateDumpSharedSpace(StaticArchiveBuilder& b) :
464 VM_Operation(), _heap_info(), _map_info(nullptr), _builder(b) {}
465
466 bool skip_operation() const { return false; }
467
468 VMOp_Type type() const { return VMOp_PopulateDumpSharedSpace; }
469 ArchiveHeapInfo* heap_info() { return &_heap_info; }
470 FileMapInfo* map_info() const { return _map_info; }
471 void doit(); // outline because gdb sucks
472 bool allow_nested_vm_operations() const { return true; }
473 }; // class VM_PopulateDumpSharedSpace
474
475 class StaticArchiveBuilder : public ArchiveBuilder {
476 public:
477 StaticArchiveBuilder() : ArchiveBuilder() {}
478
479 virtual void iterate_roots(MetaspaceClosure* it) {
480 FileMapInfo::metaspace_pointers_do(it);
481 SystemDictionaryShared::dumptime_classes_do(it);
482 Universe::metaspace_pointers_do(it);
483 vmSymbols::metaspace_pointers_do(it);
484
485 // The above code should find all the symbols that are referenced by the
486 // archived classes. We just need to add the extra symbols which
487 // may not be used by any of the archived classes -- these are usually
488 // symbols that we anticipate to be used at run time, so we can store
489 // them in the RO region, to be shared across multiple processes.
490 if (_extra_symbols != nullptr) {
491 for (int i = 0; i < _extra_symbols->length(); i++) {
492 it->push(_extra_symbols->adr_at(i));
493 }
494 }
495 }
496 };
497
498 char* VM_PopulateDumpSharedSpace::dump_read_only_tables() {
499 ArchiveBuilder::OtherROAllocMark mark;
500
501 SystemDictionaryShared::write_to_archive();
502
503 // Write lambform lines into archive
504 LambdaFormInvokers::dump_static_archive_invokers();
505 // Write module name into archive
506 CDS_JAVA_HEAP_ONLY(Modules::dump_main_module_name();)
507 // Write the other data to the output array.
508 DumpRegion* ro_region = ArchiveBuilder::current()->ro_region();
509 char* start = ro_region->top();
510 WriteClosure wc(ro_region);
511 MetaspaceShared::serialize(&wc);
512
513 return start;
514 }
515
516 void VM_PopulateDumpSharedSpace::doit() {
517 guarantee(!CDSConfig::is_using_archive(), "We should not be using an archive when we dump");
518
519 DEBUG_ONLY(SystemDictionaryShared::NoClassLoadingMark nclm);
520
521 FileMapInfo::check_nonempty_dir_in_shared_path_table();
522
523 NOT_PRODUCT(SystemDictionary::verify();)
524
525 // Block concurrent class unloading from changing the _dumptime_table
526 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
527 SystemDictionaryShared::check_excluded_classes();
528
529 _builder.gather_source_objs();
530 _builder.reserve_buffer();
531
532 CppVtables::dumptime_init(&_builder);
533
534 _builder.sort_metadata_objs();
535 _builder.dump_rw_metadata();
536 _builder.dump_ro_metadata();
537 _builder.relocate_metaspaceobj_embedded_pointers();
538
539 dump_java_heap_objects(_builder.klasses());
540 dump_shared_symbol_table(_builder.symbols());
541
542 log_info(cds)("Make classes shareable");
543 _builder.make_klasses_shareable();
544
545 char* serialized_data = dump_read_only_tables();
546
547 SystemDictionaryShared::adjust_lambda_proxy_class_dictionary();
548
549 // The vtable clones contain addresses of the current process.
550 // We don't want to write these addresses into the archive.
551 CppVtables::zero_archived_vtables();
552
553 // Write the archive file
554 const char* static_archive = CDSConfig::static_archive_path();
555 assert(static_archive != nullptr, "SharedArchiveFile not set?");
556 _map_info = new FileMapInfo(static_archive, true);
557 _map_info->populate_header(MetaspaceShared::core_region_alignment());
558 _map_info->set_serialized_data(serialized_data);
559 _map_info->set_cloned_vtables(CppVtables::vtables_serialized_base());
560 }
561
562 class CollectCLDClosure : public CLDClosure {
563 GrowableArray<ClassLoaderData*> _loaded_cld;
564 GrowableArray<OopHandle> _loaded_cld_handles; // keep the CLDs alive
565 Thread* _current_thread;
566 public:
567 CollectCLDClosure(Thread* thread) : _current_thread(thread) {}
568 ~CollectCLDClosure() {
569 for (int i = 0; i < _loaded_cld_handles.length(); i++) {
570 _loaded_cld_handles.at(i).release(Universe::vm_global());
571 }
572 }
573 void do_cld(ClassLoaderData* cld) {
574 assert(cld->is_alive(), "must be");
575 _loaded_cld.append(cld);
576 _loaded_cld_handles.append(OopHandle(Universe::vm_global(), cld->holder()));
577 }
578
579 int nof_cld() const { return _loaded_cld.length(); }
580 ClassLoaderData* cld_at(int index) { return _loaded_cld.at(index); }
581 };
582
583 // Check if we can eagerly link this class at dump time, so we can avoid the
584 // runtime linking overhead (especially verification)
585 bool MetaspaceShared::may_be_eagerly_linked(InstanceKlass* ik) {
586 if (!ik->can_be_verified_at_dumptime()) {
587 // For old classes, try to leave them in the unlinked state, so
588 // we can still store them in the archive. They must be
589 // linked/verified at runtime.
590 return false;
591 }
592 if (CDSConfig::is_dumping_dynamic_archive() && ik->is_shared_unregistered_class()) {
593 // Linking of unregistered classes at this stage may cause more
594 // classes to be resolved, resulting in calls to ClassLoader.loadClass()
595 // that may not be expected by custom class loaders.
596 //
597 // It's OK to do this for the built-in loaders as we know they can
598 // tolerate this.
599 return false;
600 }
601 return true;
602 }
603
604 bool MetaspaceShared::link_class_for_cds(InstanceKlass* ik, TRAPS) {
605 // Link the class to cause the bytecodes to be rewritten and the
606 // cpcache to be created. Class verification is done according
607 // to -Xverify setting.
608 bool res = MetaspaceShared::try_link_class(THREAD, ik);
609 ClassPrelinker::dumptime_resolve_constants(ik, CHECK_(false));
610 return res;
611 }
612
613 void MetaspaceShared::link_shared_classes(bool jcmd_request, TRAPS) {
614 ClassPrelinker::initialize();
615
616 if (!jcmd_request) {
617 LambdaFormInvokers::regenerate_holder_classes(CHECK);
618 }
619
620 // Collect all loaded ClassLoaderData.
621 CollectCLDClosure collect_cld(THREAD);
622 {
623 // ClassLoaderDataGraph::loaded_cld_do requires ClassLoaderDataGraph_lock.
624 // We cannot link the classes while holding this lock (or else we may run into deadlock).
625 // Therefore, we need to first collect all the CLDs, and then link their classes after
626 // releasing the lock.
627 MutexLocker lock(ClassLoaderDataGraph_lock);
628 ClassLoaderDataGraph::loaded_cld_do(&collect_cld);
629 }
630
631 while (true) {
632 bool has_linked = false;
633 for (int i = 0; i < collect_cld.nof_cld(); i++) {
634 ClassLoaderData* cld = collect_cld.cld_at(i);
635 for (Klass* klass = cld->klasses(); klass != nullptr; klass = klass->next_link()) {
636 if (klass->is_instance_klass()) {
637 InstanceKlass* ik = InstanceKlass::cast(klass);
638 if (may_be_eagerly_linked(ik)) {
639 has_linked |= link_class_for_cds(ik, CHECK);
640 }
641 }
642 }
643 }
644
645 if (!has_linked) {
646 break;
647 }
648 // Class linking includes verification which may load more classes.
649 // Keep scanning until we have linked no more classes.
650 }
651 }
652
653 void MetaspaceShared::prepare_for_dumping() {
654 assert(CDSConfig::is_dumping_archive(), "sanity");
655 CDSConfig::check_unsupported_dumping_module_options();
656 ClassLoader::initialize_shared_path(JavaThread::current());
657 }
658
659 // Preload classes from a list, populate the shared spaces and dump to a
660 // file.
661 void MetaspaceShared::preload_and_dump(TRAPS) {
662 ResourceMark rm(THREAD);
663 StaticArchiveBuilder builder;
664 preload_and_dump_impl(builder, THREAD);
665 if (HAS_PENDING_EXCEPTION) {
666 if (PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())) {
667 log_error(cds)("Out of memory. Please run with a larger Java heap, current MaxHeapSize = "
668 SIZE_FORMAT "M", MaxHeapSize/M);
669 MetaspaceShared::writing_error();
670 } else {
671 log_error(cds)("%s: %s", PENDING_EXCEPTION->klass()->external_name(),
672 java_lang_String::as_utf8_string(java_lang_Throwable::message(PENDING_EXCEPTION)));
673 MetaspaceShared::writing_error("Unexpected exception, use -Xlog:cds,exceptions=trace for detail");
674 }
675 }
676 }
677
678 #if INCLUDE_CDS_JAVA_HEAP && defined(_LP64)
679 void MetaspaceShared::adjust_heap_sizes_for_dumping() {
680 if (!CDSConfig::is_dumping_heap() || UseCompressedOops) {
681 return;
682 }
683 // CDS heap dumping requires all string oops to have an offset
684 // from the heap bottom that can be encoded in 32-bit.
685 julong max_heap_size = (julong)(4 * G);
686
687 if (MinHeapSize > max_heap_size) {
688 log_debug(cds)("Setting MinHeapSize to 4G for CDS dumping, original size = " SIZE_FORMAT "M", MinHeapSize/M);
689 FLAG_SET_ERGO(MinHeapSize, max_heap_size);
690 }
691 if (InitialHeapSize > max_heap_size) {
692 log_debug(cds)("Setting InitialHeapSize to 4G for CDS dumping, original size = " SIZE_FORMAT "M", InitialHeapSize/M);
693 FLAG_SET_ERGO(InitialHeapSize, max_heap_size);
694 }
695 if (MaxHeapSize > max_heap_size) {
696 log_debug(cds)("Setting MaxHeapSize to 4G for CDS dumping, original size = " SIZE_FORMAT "M", MaxHeapSize/M);
697 FLAG_SET_ERGO(MaxHeapSize, max_heap_size);
698 }
699 }
700 #endif // INCLUDE_CDS_JAVA_HEAP && _LP64
701
702 void MetaspaceShared::get_default_classlist(char* default_classlist, const size_t buf_size) {
703 // Construct the path to the class list (in jre/lib)
704 // Walk up two directories from the location of the VM and
705 // optionally tack on "lib" (depending on platform)
706 os::jvm_path(default_classlist, (jint)(buf_size));
707 for (int i = 0; i < 3; i++) {
708 char *end = strrchr(default_classlist, *os::file_separator());
709 if (end != nullptr) *end = '\0';
710 }
711 size_t classlist_path_len = strlen(default_classlist);
712 if (classlist_path_len >= 3) {
713 if (strcmp(default_classlist + classlist_path_len - 3, "lib") != 0) {
714 if (classlist_path_len < buf_size - 4) {
715 jio_snprintf(default_classlist + classlist_path_len,
716 buf_size - classlist_path_len,
717 "%slib", os::file_separator());
718 classlist_path_len += 4;
719 }
720 }
721 }
722 if (classlist_path_len < buf_size - 10) {
723 jio_snprintf(default_classlist + classlist_path_len,
724 buf_size - classlist_path_len,
725 "%sclasslist", os::file_separator());
726 }
727 }
728
729 void MetaspaceShared::loadable_descriptors(TRAPS) {
730 char default_classlist[JVM_MAXPATHLEN];
731 const char* classlist_path;
732
733 get_default_classlist(default_classlist, sizeof(default_classlist));
734 if (SharedClassListFile == nullptr) {
735 classlist_path = default_classlist;
736 } else {
737 classlist_path = SharedClassListFile;
738 }
739
740 log_info(cds)("Loading classes to share ...");
741 ClassListParser::parse_classlist(classlist_path,
742 ClassListParser::_parse_all, CHECK);
743 if (ExtraSharedClassListFile) {
744 ClassListParser::parse_classlist(ExtraSharedClassListFile,
745 ClassListParser::_parse_all, CHECK);
746 }
747 if (classlist_path != default_classlist) {
748 struct stat statbuf;
749 if (os::stat(default_classlist, &statbuf) == 0) {
750 // File exists, let's use it.
751 ClassListParser::parse_classlist(default_classlist,
752 ClassListParser::_parse_lambda_forms_invokers_only, CHECK);
753 }
754 }
755
756 // Exercise the manifest processing code to ensure classes used by CDS at runtime
757 // are always archived
758 const char* dummy = "Manifest-Version: 1.0\n";
759 CDSProtectionDomain::create_jar_manifest(dummy, strlen(dummy), CHECK);
760
761 log_info(cds)("Loading classes to share: done.");
762 }
763
764 void MetaspaceShared::preload_and_dump_impl(StaticArchiveBuilder& builder, TRAPS) {
765 loadable_descriptors(CHECK);
766
767 if (SharedArchiveConfigFile) {
768 log_info(cds)("Reading extra data from %s ...", SharedArchiveConfigFile);
769 read_extra_data(THREAD, SharedArchiveConfigFile);
770 log_info(cds)("Reading extra data: done.");
771 }
772
773 // Rewrite and link classes
774 log_info(cds)("Rewriting and linking classes ...");
775
776 // Link any classes which got missed. This would happen if we have loaded classes that
777 // were not explicitly specified in the classlist. E.g., if an interface implemented by class K
778 // fails verification, all other interfaces that were not specified in the classlist but
779 // are implemented by K are not verified.
780 link_shared_classes(false/*not from jcmd*/, CHECK);
781 log_info(cds)("Rewriting and linking classes: done");
782
783 #if INCLUDE_CDS_JAVA_HEAP
784 if (CDSConfig::is_dumping_heap()) {
785 if (!HeapShared::is_archived_boot_layer_available(THREAD)) {
786 log_info(cds)("archivedBootLayer not available, disabling full module graph");
787 CDSConfig::stop_dumping_full_module_graph();
788 }
789 HeapShared::init_for_dumping(CHECK);
790 ArchiveHeapWriter::init();
791 if (CDSConfig::is_dumping_full_module_graph()) {
792 HeapShared::reset_archived_object_states(CHECK);
793 }
794
795 // Do this at the very end, when no Java code will be executed. Otherwise
796 // some new strings may be added to the intern table.
797 StringTable::allocate_shared_strings_array(CHECK);
798 } else {
799 log_info(cds)("Not dumping heap, reset CDSConfig::_is_using_optimized_module_handling");
800 CDSConfig::stop_using_optimized_module_handling();
801 }
802 #endif
803
804 // Dummy call to load classes used at CDS runtime
805 JavaValue result(T_OBJECT);
806 Handle path_string = java_lang_String::create_from_str("dummy.jar", CHECK);
807 JavaCalls::call_static(&result,
808 vmClasses::jdk_internal_loader_ClassLoaders_klass(),
809 vmSymbols::toFileURL_name(),
810 vmSymbols::toFileURL_signature(),
811 path_string,
812 CHECK);
813
814 VM_PopulateDumpSharedSpace op(builder);
815 VMThread::execute(&op);
816
817 if (!write_static_archive(&builder, op.map_info(), op.heap_info())) {
818 THROW_MSG(vmSymbols::java_io_IOException(), "Encountered error while dumping");
819 }
820 }
821
822 bool MetaspaceShared::write_static_archive(ArchiveBuilder* builder, FileMapInfo* map_info, ArchiveHeapInfo* heap_info) {
823 // relocate the data so that it can be mapped to MetaspaceShared::requested_base_address()
824 // without runtime relocation.
825 builder->relocate_to_requested();
826
827 map_info->open_for_write();
828 if (!map_info->is_open()) {
829 return false;
830 }
831 builder->write_archive(map_info, heap_info);
832
833 if (AllowArchivingWithJavaAgent) {
834 log_warning(cds)("This archive was created with AllowArchivingWithJavaAgent. It should be used "
835 "for testing purposes only and should not be used in a production environment");
836 }
837 return true;
838 }
839
840 // Returns true if the class's status has changed.
841 bool MetaspaceShared::try_link_class(JavaThread* current, InstanceKlass* ik) {
842 ExceptionMark em(current);
843 JavaThread* THREAD = current; // For exception macros.
844 assert(CDSConfig::is_dumping_archive(), "sanity");
845 if (!ik->is_shared() && ik->is_loaded() && !ik->is_linked() && ik->can_be_verified_at_dumptime() &&
846 !SystemDictionaryShared::has_class_failed_verification(ik)) {
847 bool saved = BytecodeVerificationLocal;
848 if (ik->is_shared_unregistered_class() && ik->class_loader() == nullptr) {
849 // The verification decision is based on BytecodeVerificationRemote
850 // for non-system classes. Since we are using the null classloader
851 // to load non-system classes for customized class loaders during dumping,
852 // we need to temporarily change BytecodeVerificationLocal to be the same as
853 // BytecodeVerificationRemote. Note this can cause the parent system
854 // classes also being verified. The extra overhead is acceptable during
855 // dumping.
856 BytecodeVerificationLocal = BytecodeVerificationRemote;
857 }
858 ik->link_class(THREAD);
859 if (HAS_PENDING_EXCEPTION) {
860 ResourceMark rm(THREAD);
861 log_warning(cds)("Preload Warning: Verification failed for %s",
862 ik->external_name());
863 CLEAR_PENDING_EXCEPTION;
864 SystemDictionaryShared::set_class_has_failed_verification(ik);
865 }
866 ik->compute_has_loops_flag_for_methods();
867 BytecodeVerificationLocal = saved;
868 return true;
869 } else {
870 return false;
871 }
872 }
873
874 #if INCLUDE_CDS_JAVA_HEAP
875 void VM_PopulateDumpSharedSpace::dump_java_heap_objects(GrowableArray<Klass*>* klasses) {
876 if (CDSConfig::is_valhalla_preview()) {
877 log_info(cds)("Archived java heap is not yet supported with Valhalla preview");
878 return;
879 }
880 if(!HeapShared::can_write()) {
881 log_info(cds)(
882 "Archived java heap is not supported as UseG1GC "
883 "and UseCompressedClassPointers are required."
884 "Current settings: UseG1GC=%s, UseCompressedClassPointers=%s.",
885 BOOL_TO_STR(UseG1GC), BOOL_TO_STR(UseCompressedClassPointers));
886 return;
887 }
888 // Find all the interned strings that should be dumped.
889 int i;
890 for (i = 0; i < klasses->length(); i++) {
891 Klass* k = klasses->at(i);
892 if (k->is_instance_klass()) {
893 InstanceKlass* ik = InstanceKlass::cast(k);
894 if (ik->is_linked()) {
895 ik->constants()->add_dumped_interned_strings();
896 }
897 }
898 }
899 if (_extra_interned_strings != nullptr) {
900 for (i = 0; i < _extra_interned_strings->length(); i ++) {
901 OopHandle string = _extra_interned_strings->at(i);
902 HeapShared::add_to_dumped_interned_strings(string.resolve());
903 }
904 }
905
906 HeapShared::archive_objects(&_heap_info);
907 ArchiveBuilder::OtherROAllocMark mark;
908 HeapShared::write_subgraph_info_table();
909 }
910 #endif // INCLUDE_CDS_JAVA_HEAP
911
912 void MetaspaceShared::set_shared_metaspace_range(void* base, void *static_top, void* top) {
913 assert(base <= static_top && static_top <= top, "must be");
914 _shared_metaspace_static_top = static_top;
915 MetaspaceObj::set_shared_metaspace_range(base, top);
916 }
917
918 bool MetaspaceShared::is_shared_dynamic(void* p) {
919 if ((p < MetaspaceObj::shared_metaspace_top()) &&
920 (p >= _shared_metaspace_static_top)) {
921 return true;
922 } else {
923 return false;
924 }
925 }
926
927 bool MetaspaceShared::is_shared_static(void* p) {
928 if (is_in_shared_metaspace(p) && !is_shared_dynamic(p)) {
929 return true;
930 } else {
931 return false;
932 }
933 }
934
935 // This function is called when the JVM is unable to load the specified archive(s) due to one
936 // of the following conditions.
937 // - There's an error that indicates that the archive(s) files were corrupt or otherwise damaged.
938 // - When -XX:+RequireSharedSpaces is specified, AND the JVM cannot load the archive(s) due
939 // to version or classpath mismatch.
940 void MetaspaceShared::unrecoverable_loading_error(const char* message) {
941 log_error(cds)("An error has occurred while processing the shared archive file.");
942 if (message != nullptr) {
943 log_error(cds)("%s", message);
944 }
945 vm_exit_during_initialization("Unable to use shared archive.", nullptr);
946 }
947
948 // This function is called when the JVM is unable to write the specified CDS archive due to an
949 // unrecoverable error.
950 void MetaspaceShared::unrecoverable_writing_error(const char* message) {
951 writing_error(message);
952 vm_direct_exit(1);
953 }
954
955 // This function is called when the JVM is unable to write the specified CDS archive due to a
956 // an error. The error will be propagated
957 void MetaspaceShared::writing_error(const char* message) {
958 log_error(cds)("An error has occurred while writing the shared archive file.");
959 if (message != nullptr) {
960 log_error(cds)("%s", message);
961 }
962 }
963
964 void MetaspaceShared::initialize_runtime_shared_and_meta_spaces() {
965 assert(CDSConfig::is_using_archive(), "Must be called when UseSharedSpaces is enabled");
966 MapArchiveResult result = MAP_ARCHIVE_OTHER_FAILURE;
967
968 FileMapInfo* static_mapinfo = open_static_archive();
969 FileMapInfo* dynamic_mapinfo = nullptr;
970
971 if (static_mapinfo != nullptr) {
972 log_info(cds)("Core region alignment: " SIZE_FORMAT, static_mapinfo->core_region_alignment());
973 dynamic_mapinfo = open_dynamic_archive();
974
975 // First try to map at the requested address
976 result = map_archives(static_mapinfo, dynamic_mapinfo, true);
977 if (result == MAP_ARCHIVE_MMAP_FAILURE) {
978 // Mapping has failed (probably due to ASLR). Let's map at an address chosen
979 // by the OS.
980 log_info(cds)("Try to map archive(s) at an alternative address");
981 result = map_archives(static_mapinfo, dynamic_mapinfo, false);
982 }
983 }
984
985 if (result == MAP_ARCHIVE_SUCCESS) {
986 bool dynamic_mapped = (dynamic_mapinfo != nullptr && dynamic_mapinfo->is_mapped());
987 char* cds_base = static_mapinfo->mapped_base();
988 char* cds_end = dynamic_mapped ? dynamic_mapinfo->mapped_end() : static_mapinfo->mapped_end();
989 // Register CDS memory region with LSan.
990 LSAN_REGISTER_ROOT_REGION(cds_base, cds_end - cds_base);
991 set_shared_metaspace_range(cds_base, static_mapinfo->mapped_end(), cds_end);
992 _relocation_delta = static_mapinfo->relocation_delta();
993 _requested_base_address = static_mapinfo->requested_base_address();
994 if (dynamic_mapped) {
995 FileMapInfo::set_shared_path_table(dynamic_mapinfo);
996 // turn AutoCreateSharedArchive off if successfully mapped
997 AutoCreateSharedArchive = false;
998 } else {
999 FileMapInfo::set_shared_path_table(static_mapinfo);
1000 }
1001 } else {
1002 set_shared_metaspace_range(nullptr, nullptr, nullptr);
1003 if (CDSConfig::is_dumping_dynamic_archive()) {
1004 log_warning(cds)("-XX:ArchiveClassesAtExit is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info.");
1005 }
1006 UseSharedSpaces = false;
1007 // The base archive cannot be mapped. We cannot dump the dynamic shared archive.
1008 AutoCreateSharedArchive = false;
1009 CDSConfig::disable_dumping_dynamic_archive();
1010 log_info(cds)("Unable to map shared spaces");
1011 if (PrintSharedArchiveAndExit) {
1012 MetaspaceShared::unrecoverable_loading_error("Unable to use shared archive.");
1013 } else if (RequireSharedSpaces) {
1014 MetaspaceShared::unrecoverable_loading_error("Unable to map shared spaces");
1015 }
1016 }
1017
1018 // If mapping failed and -XShare:on, the vm should exit
1019 bool has_failed = false;
1020 if (static_mapinfo != nullptr && !static_mapinfo->is_mapped()) {
1021 has_failed = true;
1022 delete static_mapinfo;
1023 }
1024 if (dynamic_mapinfo != nullptr && !dynamic_mapinfo->is_mapped()) {
1025 has_failed = true;
1026 delete dynamic_mapinfo;
1027 }
1028 if (RequireSharedSpaces && has_failed) {
1029 MetaspaceShared::unrecoverable_loading_error("Unable to map shared spaces");
1030 }
1031 }
1032
1033 FileMapInfo* MetaspaceShared::open_static_archive() {
1034 const char* static_archive = CDSConfig::static_archive_path();
1035 assert(static_archive != nullptr, "sanity");
1036 FileMapInfo* mapinfo = new FileMapInfo(static_archive, true);
1037 if (!mapinfo->initialize()) {
1038 delete(mapinfo);
1039 return nullptr;
1040 }
1041 return mapinfo;
1042 }
1043
1044 FileMapInfo* MetaspaceShared::open_dynamic_archive() {
1045 if (CDSConfig::is_dumping_dynamic_archive()) {
1046 return nullptr;
1047 }
1048 const char* dynamic_archive = CDSConfig::dynamic_archive_path();
1049 if (dynamic_archive == nullptr) {
1050 return nullptr;
1051 }
1052
1053 FileMapInfo* mapinfo = new FileMapInfo(dynamic_archive, false);
1054 if (!mapinfo->initialize()) {
1055 delete(mapinfo);
1056 if (RequireSharedSpaces) {
1057 MetaspaceShared::unrecoverable_loading_error("Failed to initialize dynamic archive");
1058 }
1059 return nullptr;
1060 }
1061 return mapinfo;
1062 }
1063
1064 // use_requested_addr:
1065 // true = map at FileMapHeader::_requested_base_address
1066 // false = map at an alternative address picked by OS.
1067 MapArchiveResult MetaspaceShared::map_archives(FileMapInfo* static_mapinfo, FileMapInfo* dynamic_mapinfo,
1068 bool use_requested_addr) {
1069 if (use_requested_addr && static_mapinfo->requested_base_address() == nullptr) {
1070 log_info(cds)("Archive(s) were created with -XX:SharedBaseAddress=0. Always map at os-selected address.");
1071 return MAP_ARCHIVE_MMAP_FAILURE;
1072 }
1073
1074 PRODUCT_ONLY(if (ArchiveRelocationMode == 1 && use_requested_addr) {
1075 // For product build only -- this is for benchmarking the cost of doing relocation.
1076 // For debug builds, the check is done below, after reserving the space, for better test coverage
1077 // (see comment below).
1078 log_info(cds)("ArchiveRelocationMode == 1: always map archive(s) at an alternative address");
1079 return MAP_ARCHIVE_MMAP_FAILURE;
1080 });
1081
1082 if (ArchiveRelocationMode == 2 && !use_requested_addr) {
1083 log_info(cds)("ArchiveRelocationMode == 2: never map archive(s) at an alternative address");
1084 return MAP_ARCHIVE_MMAP_FAILURE;
1085 };
1086
1087 if (dynamic_mapinfo != nullptr) {
1088 // Ensure that the OS won't be able to allocate new memory spaces between the two
1089 // archives, or else it would mess up the simple comparison in MetaspaceObj::is_shared().
1090 assert(static_mapinfo->mapping_end_offset() == dynamic_mapinfo->mapping_base_offset(), "no gap");
1091 }
1092
1093 ReservedSpace total_space_rs, archive_space_rs, class_space_rs;
1094 MapArchiveResult result = MAP_ARCHIVE_OTHER_FAILURE;
1095 char* mapped_base_address = reserve_address_space_for_archives(static_mapinfo,
1096 dynamic_mapinfo,
1097 use_requested_addr,
1098 total_space_rs,
1099 archive_space_rs,
1100 class_space_rs);
1101 if (mapped_base_address == nullptr) {
1102 result = MAP_ARCHIVE_MMAP_FAILURE;
1103 log_debug(cds)("Failed to reserve spaces (use_requested_addr=%u)", (unsigned)use_requested_addr);
1104 } else {
1105
1106 #ifdef ASSERT
1107 // Some sanity checks after reserving address spaces for archives
1108 // and class space.
1109 assert(archive_space_rs.is_reserved(), "Sanity");
1110 if (Metaspace::using_class_space()) {
1111 // Class space must closely follow the archive space. Both spaces
1112 // must be aligned correctly.
1113 assert(class_space_rs.is_reserved(),
1114 "A class space should have been reserved");
1115 assert(class_space_rs.base() >= archive_space_rs.end(),
1116 "class space should follow the cds archive space");
1117 assert(is_aligned(archive_space_rs.base(),
1118 core_region_alignment()),
1119 "Archive space misaligned");
1120 assert(is_aligned(class_space_rs.base(),
1121 Metaspace::reserve_alignment()),
1122 "class space misaligned");
1123 }
1124 #endif // ASSERT
1125
1126 log_info(cds)("Reserved archive_space_rs [" INTPTR_FORMAT " - " INTPTR_FORMAT "] (" SIZE_FORMAT ") bytes",
1127 p2i(archive_space_rs.base()), p2i(archive_space_rs.end()), archive_space_rs.size());
1128 log_info(cds)("Reserved class_space_rs [" INTPTR_FORMAT " - " INTPTR_FORMAT "] (" SIZE_FORMAT ") bytes",
1129 p2i(class_space_rs.base()), p2i(class_space_rs.end()), class_space_rs.size());
1130
1131 if (MetaspaceShared::use_windows_memory_mapping()) {
1132 // We have now reserved address space for the archives, and will map in
1133 // the archive files into this space.
1134 //
1135 // Special handling for Windows: on Windows we cannot map a file view
1136 // into an existing memory mapping. So, we unmap the address range we
1137 // just reserved again, which will make it available for mapping the
1138 // archives.
1139 // Reserving this range has not been for naught however since it makes
1140 // us reasonably sure the address range is available.
1141 //
1142 // But still it may fail, since between unmapping the range and mapping
1143 // in the archive someone else may grab the address space. Therefore
1144 // there is a fallback in FileMap::map_region() where we just read in
1145 // the archive files sequentially instead of mapping it in. We couple
1146 // this with use_requested_addr, since we're going to patch all the
1147 // pointers anyway so there's no benefit to mmap.
1148 if (use_requested_addr) {
1149 assert(!total_space_rs.is_reserved(), "Should not be reserved for Windows");
1150 log_info(cds)("Windows mmap workaround: releasing archive space.");
1151 archive_space_rs.release();
1152 }
1153 }
1154 MapArchiveResult static_result = map_archive(static_mapinfo, mapped_base_address, archive_space_rs);
1155 MapArchiveResult dynamic_result = (static_result == MAP_ARCHIVE_SUCCESS) ?
1156 map_archive(dynamic_mapinfo, mapped_base_address, archive_space_rs) : MAP_ARCHIVE_OTHER_FAILURE;
1157
1158 DEBUG_ONLY(if (ArchiveRelocationMode == 1 && use_requested_addr) {
1159 // This is for simulating mmap failures at the requested address. In
1160 // debug builds, we do it here (after all archives have possibly been
1161 // mapped), so we can thoroughly test the code for failure handling
1162 // (releasing all allocated resource, etc).
1163 log_info(cds)("ArchiveRelocationMode == 1: always map archive(s) at an alternative address");
1164 if (static_result == MAP_ARCHIVE_SUCCESS) {
1165 static_result = MAP_ARCHIVE_MMAP_FAILURE;
1166 }
1167 if (dynamic_result == MAP_ARCHIVE_SUCCESS) {
1168 dynamic_result = MAP_ARCHIVE_MMAP_FAILURE;
1169 }
1170 });
1171
1172 if (static_result == MAP_ARCHIVE_SUCCESS) {
1173 if (dynamic_result == MAP_ARCHIVE_SUCCESS) {
1174 result = MAP_ARCHIVE_SUCCESS;
1175 } else if (dynamic_result == MAP_ARCHIVE_OTHER_FAILURE) {
1176 assert(dynamic_mapinfo != nullptr && !dynamic_mapinfo->is_mapped(), "must have failed");
1177 // No need to retry mapping the dynamic archive again, as it will never succeed
1178 // (bad file, etc) -- just keep the base archive.
1179 log_warning(cds, dynamic)("Unable to use shared archive. The top archive failed to load: %s",
1180 dynamic_mapinfo->full_path());
1181 result = MAP_ARCHIVE_SUCCESS;
1182 // TODO, we can give the unused space for the dynamic archive to class_space_rs, but there's no
1183 // easy API to do that right now.
1184 } else {
1185 result = MAP_ARCHIVE_MMAP_FAILURE;
1186 }
1187 } else if (static_result == MAP_ARCHIVE_OTHER_FAILURE) {
1188 result = MAP_ARCHIVE_OTHER_FAILURE;
1189 } else {
1190 result = MAP_ARCHIVE_MMAP_FAILURE;
1191 }
1192 }
1193
1194 if (result == MAP_ARCHIVE_SUCCESS) {
1195 SharedBaseAddress = (size_t)mapped_base_address;
1196 #ifdef _LP64
1197 if (Metaspace::using_class_space()) {
1198 // Set up ccs in metaspace.
1199 Metaspace::initialize_class_space(class_space_rs);
1200
1201 // Set up compressed Klass pointer encoding: the encoding range must
1202 // cover both archive and class space.
1203 address cds_base = (address)static_mapinfo->mapped_base();
1204 address ccs_end = (address)class_space_rs.end();
1205 assert(ccs_end > cds_base, "Sanity check");
1206 #if INCLUDE_CDS_JAVA_HEAP
1207 // We archived objects with pre-computed narrow Klass id. Set up encoding such that these Ids stay valid.
1208 address precomputed_narrow_klass_base = cds_base;
1209 const int precomputed_narrow_klass_shift = ArchiveHeapWriter::precomputed_narrow_klass_shift;
1210 CompressedKlassPointers::initialize_for_given_encoding(
1211 cds_base, ccs_end - cds_base, // Klass range
1212 precomputed_narrow_klass_base, precomputed_narrow_klass_shift // precomputed encoding, see ArchiveHeapWriter
1213 );
1214 #else
1215 CompressedKlassPointers::initialize (
1216 cds_base, ccs_end - cds_base // Klass range
1217 );
1218 #endif // INCLUDE_CDS_JAVA_HEAP
1219 // map_or_load_heap_region() compares the current narrow oop and klass encodings
1220 // with the archived ones, so it must be done after all encodings are determined.
1221 static_mapinfo->map_or_load_heap_region();
1222 }
1223 #endif // _LP64
1224 log_info(cds)("initial optimized module handling: %s", CDSConfig::is_using_optimized_module_handling() ? "enabled" : "disabled");
1225 log_info(cds)("initial full module graph: %s", CDSConfig::is_using_full_module_graph() ? "enabled" : "disabled");
1226 } else {
1227 unmap_archive(static_mapinfo);
1228 unmap_archive(dynamic_mapinfo);
1229 release_reserved_spaces(total_space_rs, archive_space_rs, class_space_rs);
1230 }
1231
1232 return result;
1233 }
1234
1235
1236 // This will reserve two address spaces suitable to house Klass structures, one
1237 // for the cds archives (static archive and optionally dynamic archive) and
1238 // optionally one move for ccs.
1239 //
1240 // Since both spaces must fall within the compressed class pointer encoding
1241 // range, they are allocated close to each other.
1242 //
1243 // Space for archives will be reserved first, followed by a potential gap,
1244 // followed by the space for ccs:
1245 //
1246 // +-- Base address A B End
1247 // | | | |
1248 // v v v v
1249 // +-------------+--------------+ +----------------------+
1250 // | static arc | [dyn. arch] | [gap] | compr. class space |
1251 // +-------------+--------------+ +----------------------+
1252 //
1253 // (The gap may result from different alignment requirements between metaspace
1254 // and CDS)
1255 //
1256 // If UseCompressedClassPointers is disabled, only one address space will be
1257 // reserved:
1258 //
1259 // +-- Base address End
1260 // | |
1261 // v v
1262 // +-------------+--------------+
1263 // | static arc | [dyn. arch] |
1264 // +-------------+--------------+
1265 //
1266 // Base address: If use_archive_base_addr address is true, the Base address is
1267 // determined by the address stored in the static archive. If
1268 // use_archive_base_addr address is false, this base address is determined
1269 // by the platform.
1270 //
1271 // If UseCompressedClassPointers=1, the range encompassing both spaces will be
1272 // suitable to en/decode narrow Klass pointers: the base will be valid for
1273 // encoding, the range [Base, End) not surpass KlassEncodingMetaspaceMax.
1274 //
1275 // Return:
1276 //
1277 // - On success:
1278 // - total_space_rs will be reserved as whole for archive_space_rs and
1279 // class_space_rs if UseCompressedClassPointers is true.
1280 // On Windows, try reserve archive_space_rs and class_space_rs
1281 // separately first if use_archive_base_addr is true.
1282 // - archive_space_rs will be reserved and large enough to host static and
1283 // if needed dynamic archive: [Base, A).
1284 // archive_space_rs.base and size will be aligned to CDS reserve
1285 // granularity.
1286 // - class_space_rs: If UseCompressedClassPointers=1, class_space_rs will
1287 // be reserved. Its start address will be aligned to metaspace reserve
1288 // alignment, which may differ from CDS alignment. It will follow the cds
1289 // archive space, close enough such that narrow class pointer encoding
1290 // covers both spaces.
1291 // If UseCompressedClassPointers=0, class_space_rs remains unreserved.
1292 // - On error: null is returned and the spaces remain unreserved.
1293 char* MetaspaceShared::reserve_address_space_for_archives(FileMapInfo* static_mapinfo,
1294 FileMapInfo* dynamic_mapinfo,
1295 bool use_archive_base_addr,
1296 ReservedSpace& total_space_rs,
1297 ReservedSpace& archive_space_rs,
1298 ReservedSpace& class_space_rs) {
1299
1300 address const base_address = (address) (use_archive_base_addr ? static_mapinfo->requested_base_address() : nullptr);
1301 const size_t archive_space_alignment = core_region_alignment();
1302
1303 // Size and requested location of the archive_space_rs (for both static and dynamic archives)
1304 assert(static_mapinfo->mapping_base_offset() == 0, "Must be");
1305 size_t archive_end_offset = (dynamic_mapinfo == nullptr) ? static_mapinfo->mapping_end_offset() : dynamic_mapinfo->mapping_end_offset();
1306 size_t archive_space_size = align_up(archive_end_offset, archive_space_alignment);
1307
1308 if (!Metaspace::using_class_space()) {
1309 // Get the simple case out of the way first:
1310 // no compressed class space, simple allocation.
1311
1312 // When running without class space, requested archive base should be aligned to cds core alignment.
1313 assert(is_aligned(base_address, archive_space_alignment),
1314 "Archive base address unaligned: " PTR_FORMAT ", needs alignment: %zu.",
1315 p2i(base_address), archive_space_alignment);
1316
1317 archive_space_rs = ReservedSpace(archive_space_size, archive_space_alignment,
1318 os::vm_page_size(), (char*)base_address);
1319 if (archive_space_rs.is_reserved()) {
1320 assert(base_address == nullptr ||
1321 (address)archive_space_rs.base() == base_address, "Sanity");
1322 // Register archive space with NMT.
1323 MemTracker::record_virtual_memory_tag(archive_space_rs.base(), mtClassShared);
1324 return archive_space_rs.base();
1325 }
1326 return nullptr;
1327 }
1328
1329 #ifdef _LP64
1330
1331 // Complex case: two spaces adjacent to each other, both to be addressable
1332 // with narrow class pointers.
1333 // We reserve the whole range spanning both spaces, then split that range up.
1334
1335 const size_t class_space_alignment = Metaspace::reserve_alignment();
1336
1337 // When running with class space, requested archive base must satisfy both cds core alignment
1338 // and class space alignment.
1339 const size_t base_address_alignment = MAX2(class_space_alignment, archive_space_alignment);
1340 assert(is_aligned(base_address, base_address_alignment),
1341 "Archive base address unaligned: " PTR_FORMAT ", needs alignment: %zu.",
1342 p2i(base_address), base_address_alignment);
1343
1344 size_t class_space_size = CompressedClassSpaceSize;
1345 assert(CompressedClassSpaceSize > 0 &&
1346 is_aligned(CompressedClassSpaceSize, class_space_alignment),
1347 "CompressedClassSpaceSize malformed: "
1348 SIZE_FORMAT, CompressedClassSpaceSize);
1349
1350 const size_t ccs_begin_offset = align_up(archive_space_size, class_space_alignment);
1351 const size_t gap_size = ccs_begin_offset - archive_space_size;
1352
1353 // Reduce class space size if it would not fit into the Klass encoding range
1354 constexpr size_t max_encoding_range_size = 4 * G;
1355 guarantee(archive_space_size < max_encoding_range_size - class_space_alignment, "Archive too large");
1356 if ((archive_space_size + gap_size + class_space_size) > max_encoding_range_size) {
1357 class_space_size = align_down(max_encoding_range_size - archive_space_size - gap_size, class_space_alignment);
1358 log_info(metaspace)("CDS initialization: reducing class space size from " SIZE_FORMAT " to " SIZE_FORMAT,
1359 CompressedClassSpaceSize, class_space_size);
1360 FLAG_SET_ERGO(CompressedClassSpaceSize, class_space_size);
1361 }
1362
1363 const size_t total_range_size =
1364 archive_space_size + gap_size + class_space_size;
1365
1366 assert(total_range_size > ccs_begin_offset, "must be");
1367 if (use_windows_memory_mapping() && use_archive_base_addr) {
1368 if (base_address != nullptr) {
1369 // On Windows, we cannot safely split a reserved memory space into two (see JDK-8255917).
1370 // Hence, we optimistically reserve archive space and class space side-by-side. We only
1371 // do this for use_archive_base_addr=true since for use_archive_base_addr=false case
1372 // caller will not split the combined space for mapping, instead read the archive data
1373 // via sequential file IO.
1374 address ccs_base = base_address + archive_space_size + gap_size;
1375 archive_space_rs = ReservedSpace(archive_space_size, archive_space_alignment,
1376 os::vm_page_size(), (char*)base_address);
1377 class_space_rs = ReservedSpace(class_space_size, class_space_alignment,
1378 os::vm_page_size(), (char*)ccs_base);
1379 }
1380 if (!archive_space_rs.is_reserved() || !class_space_rs.is_reserved()) {
1381 release_reserved_spaces(total_space_rs, archive_space_rs, class_space_rs);
1382 return nullptr;
1383 }
1384 // NMT: fix up the space tags
1385 MemTracker::record_virtual_memory_tag(archive_space_rs.base(), mtClassShared);
1386 MemTracker::record_virtual_memory_tag(class_space_rs.base(), mtClass);
1387 } else {
1388 if (use_archive_base_addr && base_address != nullptr) {
1389 total_space_rs = ReservedSpace(total_range_size, base_address_alignment,
1390 os::vm_page_size(), (char*) base_address);
1391 } else {
1392 // We did not manage to reserve at the preferred address, or were instructed to relocate. In that
1393 // case we reserve wherever possible, but the start address needs to be encodable as narrow Klass
1394 // encoding base since the archived heap objects contain nKlass IDs pre-calculated toward the start
1395 // of the shared Metaspace. That prevents us from using zero-based encoding and therefore we won't
1396 // try allocating in low-address regions.
1397 total_space_rs = Metaspace::reserve_address_space_for_compressed_classes(total_range_size, false /* optimize_for_zero_base */);
1398 }
1399
1400 if (!total_space_rs.is_reserved()) {
1401 return nullptr;
1402 }
1403
1404 // Paranoid checks:
1405 assert(base_address == nullptr || (address)total_space_rs.base() == base_address,
1406 "Sanity (" PTR_FORMAT " vs " PTR_FORMAT ")", p2i(base_address), p2i(total_space_rs.base()));
1407 assert(is_aligned(total_space_rs.base(), base_address_alignment), "Sanity");
1408 assert(total_space_rs.size() == total_range_size, "Sanity");
1409
1410 // Now split up the space into ccs and cds archive. For simplicity, just leave
1411 // the gap reserved at the end of the archive space. Do not do real splitting.
1412 archive_space_rs = total_space_rs.first_part(ccs_begin_offset,
1413 (size_t)archive_space_alignment);
1414 class_space_rs = total_space_rs.last_part(ccs_begin_offset);
1415 MemTracker::record_virtual_memory_split_reserved(total_space_rs.base(), total_space_rs.size(),
1416 ccs_begin_offset, mtClassShared, mtClass);
1417 }
1418 assert(is_aligned(archive_space_rs.base(), archive_space_alignment), "Sanity");
1419 assert(is_aligned(archive_space_rs.size(), archive_space_alignment), "Sanity");
1420 assert(is_aligned(class_space_rs.base(), class_space_alignment), "Sanity");
1421 assert(is_aligned(class_space_rs.size(), class_space_alignment), "Sanity");
1422
1423
1424 return archive_space_rs.base();
1425
1426 #else
1427 ShouldNotReachHere();
1428 return nullptr;
1429 #endif
1430
1431 }
1432
1433 void MetaspaceShared::release_reserved_spaces(ReservedSpace& total_space_rs,
1434 ReservedSpace& archive_space_rs,
1435 ReservedSpace& class_space_rs) {
1436 if (total_space_rs.is_reserved()) {
1437 log_debug(cds)("Released shared space (archive + class) " INTPTR_FORMAT, p2i(total_space_rs.base()));
1438 total_space_rs.release();
1439 } else {
1440 if (archive_space_rs.is_reserved()) {
1441 log_debug(cds)("Released shared space (archive) " INTPTR_FORMAT, p2i(archive_space_rs.base()));
1442 archive_space_rs.release();
1443 }
1444 if (class_space_rs.is_reserved()) {
1445 log_debug(cds)("Released shared space (classes) " INTPTR_FORMAT, p2i(class_space_rs.base()));
1446 class_space_rs.release();
1447 }
1448 }
1449 }
1450
1451 static int archive_regions[] = { MetaspaceShared::rw, MetaspaceShared::ro };
1452 static int archive_regions_count = 2;
1453
1454 MapArchiveResult MetaspaceShared::map_archive(FileMapInfo* mapinfo, char* mapped_base_address, ReservedSpace rs) {
1455 assert(CDSConfig::is_using_archive(), "must be runtime");
1456 if (mapinfo == nullptr) {
1457 return MAP_ARCHIVE_SUCCESS; // The dynamic archive has not been specified. No error has happened -- trivially succeeded.
1458 }
1459
1460 mapinfo->set_is_mapped(false);
1461 if (mapinfo->core_region_alignment() != (size_t)core_region_alignment()) {
1462 log_info(cds)("Unable to map CDS archive -- core_region_alignment() expected: " SIZE_FORMAT
1463 " actual: " SIZE_FORMAT, mapinfo->core_region_alignment(), core_region_alignment());
1464 return MAP_ARCHIVE_OTHER_FAILURE;
1465 }
1466
1467 MapArchiveResult result =
1468 mapinfo->map_regions(archive_regions, archive_regions_count, mapped_base_address, rs);
1469
1470 if (result != MAP_ARCHIVE_SUCCESS) {
1471 unmap_archive(mapinfo);
1472 return result;
1473 }
1474
1475 if (!mapinfo->validate_shared_path_table()) {
1476 unmap_archive(mapinfo);
1477 return MAP_ARCHIVE_OTHER_FAILURE;
1478 }
1479
1480 mapinfo->set_is_mapped(true);
1481 return MAP_ARCHIVE_SUCCESS;
1482 }
1483
1484 void MetaspaceShared::unmap_archive(FileMapInfo* mapinfo) {
1485 assert(CDSConfig::is_using_archive(), "must be runtime");
1486 if (mapinfo != nullptr) {
1487 mapinfo->unmap_regions(archive_regions, archive_regions_count);
1488 mapinfo->unmap_region(MetaspaceShared::bm);
1489 mapinfo->set_is_mapped(false);
1490 }
1491 }
1492
1493 // For -XX:PrintSharedArchiveAndExit
1494 class CountSharedSymbols : public SymbolClosure {
1495 private:
1496 int _count;
1497 public:
1498 CountSharedSymbols() : _count(0) {}
1499 void do_symbol(Symbol** sym) {
1500 _count++;
1501 }
1502 int total() { return _count; }
1503
1504 };
1505
1506 // Read the miscellaneous data from the shared file, and
1507 // serialize it out to its various destinations.
1508
1509 void MetaspaceShared::initialize_shared_spaces() {
1510 FileMapInfo *static_mapinfo = FileMapInfo::current_info();
1511
1512 // Verify various attributes of the archive, plus initialize the
1513 // shared string/symbol tables.
1514 char* buffer = static_mapinfo->serialized_data();
1515 intptr_t* array = (intptr_t*)buffer;
1516 ReadClosure rc(&array);
1517 serialize(&rc);
1518
1519 // Finish up archived heap initialization. These must be
1520 // done after ReadClosure.
1521 static_mapinfo->patch_heap_embedded_pointers();
1522 ArchiveHeapLoader::finish_initialization();
1523 Universe::load_archived_object_instances();
1524
1525 // Close the mapinfo file
1526 static_mapinfo->close();
1527
1528 static_mapinfo->unmap_region(MetaspaceShared::bm);
1529
1530 FileMapInfo *dynamic_mapinfo = FileMapInfo::dynamic_info();
1531 if (dynamic_mapinfo != nullptr) {
1532 intptr_t* buffer = (intptr_t*)dynamic_mapinfo->serialized_data();
1533 ReadClosure rc(&buffer);
1534 ArchiveBuilder::serialize_dynamic_archivable_items(&rc);
1535 DynamicArchive::setup_array_klasses();
1536 dynamic_mapinfo->close();
1537 dynamic_mapinfo->unmap_region(MetaspaceShared::bm);
1538 }
1539
1540 // Set up LambdaFormInvokers::_lambdaform_lines for dynamic dump
1541 if (CDSConfig::is_dumping_dynamic_archive()) {
1542 // Read stored LF format lines stored in static archive
1543 LambdaFormInvokers::read_static_archive_invokers();
1544 }
1545
1546 if (PrintSharedArchiveAndExit) {
1547 // Print archive names
1548 if (dynamic_mapinfo != nullptr) {
1549 tty->print_cr("\n\nBase archive name: %s", CDSConfig::static_archive_path());
1550 tty->print_cr("Base archive version %d", static_mapinfo->version());
1551 } else {
1552 tty->print_cr("Static archive name: %s", static_mapinfo->full_path());
1553 tty->print_cr("Static archive version %d", static_mapinfo->version());
1554 }
1555
1556 SystemDictionaryShared::print_shared_archive(tty);
1557 if (dynamic_mapinfo != nullptr) {
1558 tty->print_cr("\n\nDynamic archive name: %s", dynamic_mapinfo->full_path());
1559 tty->print_cr("Dynamic archive version %d", dynamic_mapinfo->version());
1560 SystemDictionaryShared::print_shared_archive(tty, false/*dynamic*/);
1561 }
1562
1563 // collect shared symbols and strings
1564 CountSharedSymbols cl;
1565 SymbolTable::shared_symbols_do(&cl);
1566 tty->print_cr("Number of shared symbols: %d", cl.total());
1567 tty->print_cr("Number of shared strings: %zu", StringTable::shared_entry_count());
1568 tty->print_cr("VM version: %s\r\n", static_mapinfo->vm_version());
1569 if (FileMapInfo::current_info() == nullptr || _archive_loading_failed) {
1570 tty->print_cr("archive is invalid");
1571 vm_exit(1);
1572 } else {
1573 tty->print_cr("archive is valid");
1574 vm_exit(0);
1575 }
1576 }
1577 }
1578
1579 // JVM/TI RedefineClasses() support:
1580 bool MetaspaceShared::remap_shared_readonly_as_readwrite() {
1581 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
1582
1583 if (CDSConfig::is_using_archive()) {
1584 // remap the shared readonly space to shared readwrite, private
1585 FileMapInfo* mapinfo = FileMapInfo::current_info();
1586 if (!mapinfo->remap_shared_readonly_as_readwrite()) {
1587 return false;
1588 }
1589 if (FileMapInfo::dynamic_info() != nullptr) {
1590 mapinfo = FileMapInfo::dynamic_info();
1591 if (!mapinfo->remap_shared_readonly_as_readwrite()) {
1592 return false;
1593 }
1594 }
1595 _remapped_readwrite = true;
1596 }
1597 return true;
1598 }
1599
1600 void MetaspaceShared::print_on(outputStream* st) {
1601 if (CDSConfig::is_using_archive()) {
1602 st->print("CDS archive(s) mapped at: ");
1603 address base = (address)MetaspaceObj::shared_metaspace_base();
1604 address static_top = (address)_shared_metaspace_static_top;
1605 address top = (address)MetaspaceObj::shared_metaspace_top();
1606 st->print("[" PTR_FORMAT "-" PTR_FORMAT "-" PTR_FORMAT "), ", p2i(base), p2i(static_top), p2i(top));
1607 st->print("size " SIZE_FORMAT ", ", top - base);
1608 st->print("SharedBaseAddress: " PTR_FORMAT ", ArchiveRelocationMode: %d.", SharedBaseAddress, ArchiveRelocationMode);
1609 } else {
1610 st->print("CDS archive(s) not mapped");
1611 }
1612 st->cr();
1613 }