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