1 /*
2 * Copyright (c) 2012, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds/aotCacheAccess.hpp"
26 #include "cds/aotClassInitializer.hpp"
27 #include "cds/aotArtifactFinder.hpp"
28 #include "cds/aotClassInitializer.hpp"
29 #include "cds/aotClassLinker.hpp"
30 #include "cds/aotClassLocation.hpp"
31 #include "cds/aotConstantPoolResolver.hpp"
32 #include "cds/aotLinkedClassBulkLoader.hpp"
33 #include "cds/aotReferenceObjSupport.hpp"
34 #include "cds/archiveBuilder.hpp"
35 #include "cds/archiveHeapLoader.hpp"
36 #include "cds/archiveHeapWriter.hpp"
37 #include "cds/cds_globals.hpp"
38 #include "cds/cdsConfig.hpp"
39 #include "cds/cdsProtectionDomain.hpp"
40 #include "cds/classListParser.hpp"
41 #include "cds/classListWriter.hpp"
42 #include "cds/cppVtables.hpp"
43 #include "cds/dumpAllocStats.hpp"
44 #include "cds/dynamicArchive.hpp"
45 #include "cds/filemap.hpp"
46 #include "cds/finalImageRecipes.hpp"
47 #include "cds/heapShared.hpp"
48 #include "cds/lambdaFormInvokers.hpp"
49 #include "cds/lambdaProxyClassDictionary.hpp"
50 #include "cds/metaspaceShared.hpp"
51 #include "classfile/classLoaderDataGraph.hpp"
52 #include "classfile/classLoaderDataShared.hpp"
53 #include "classfile/classLoaderExt.hpp"
54 #include "classfile/javaClasses.inline.hpp"
55 #include "classfile/loaderConstraints.hpp"
56 #include "classfile/modules.hpp"
57 #include "classfile/placeholders.hpp"
58 #include "classfile/stringTable.hpp"
59 #include "classfile/symbolTable.hpp"
60 #include "classfile/systemDictionary.hpp"
61 #include "classfile/systemDictionaryShared.hpp"
62 #include "classfile/vmClasses.hpp"
63 #include "classfile/vmSymbols.hpp"
64 #include "code/aotCodeCache.hpp"
65 #include "code/codeCache.hpp"
66 #include "compiler/compileBroker.hpp"
67 #include "compiler/precompiler.hpp"
68 #include "gc/shared/gcVMOperations.hpp"
69 #include "interpreter/bytecodeStream.hpp"
70 #include "interpreter/bytecodes.hpp"
71 #include "jvm_io.h"
72 #include "logging/log.hpp"
73 #include "logging/logMessage.hpp"
74 #include "logging/logStream.hpp"
75 #include "memory/memoryReserver.hpp"
76 #include "memory/metaspace.hpp"
77 #include "memory/metaspaceClosure.hpp"
78 #include "memory/oopFactory.hpp"
79 #include "memory/resourceArea.hpp"
80 #include "memory/universe.hpp"
81 #include "nmt/memTracker.hpp"
82 #include "oops/compressedKlass.hpp"
83 #include "oops/instanceMirrorKlass.hpp"
84 #include "oops/klass.inline.hpp"
85 #include "oops/method.inline.hpp"
86 #include "oops/objArrayOop.hpp"
87 #include "oops/oop.inline.hpp"
88 #include "oops/oopHandle.hpp"
89 #include "oops/trainingData.hpp"
90 #include "prims/jvmtiExport.hpp"
91 #include "prims/whitebox.hpp"
92 #include "runtime/arguments.hpp"
93 #include "runtime/globals.hpp"
94 #include "runtime/globals_extension.hpp"
95 #include "runtime/handles.inline.hpp"
96 #include "runtime/javaCalls.hpp"
97 #include "runtime/os.inline.hpp"
98 #include "runtime/safepointVerifiers.hpp"
99 #include "runtime/sharedRuntime.hpp"
100 #include "runtime/vmOperations.hpp"
101 #include "runtime/vmThread.hpp"
102 #include "sanitizers/leak.hpp"
103 #include "services/management.hpp"
104 #include "utilities/align.hpp"
105 #include "utilities/bitMap.inline.hpp"
106 #include "utilities/defaultStream.hpp"
107 #include "utilities/macros.hpp"
108 #include "utilities/ostream.hpp"
109 #include "utilities/resourceHash.hpp"
110
111 #include <sys/stat.h>
112
113 ReservedSpace MetaspaceShared::_symbol_rs;
114 VirtualSpace MetaspaceShared::_symbol_vs;
115 bool MetaspaceShared::_archive_loading_failed = false;
116 bool MetaspaceShared::_remapped_readwrite = false;
117 void* MetaspaceShared::_shared_metaspace_static_top = nullptr;
118 intx MetaspaceShared::_relocation_delta;
119 char* MetaspaceShared::_requested_base_address;
120 Array<Method*>* MetaspaceShared::_archived_method_handle_intrinsics = nullptr;
121 bool MetaspaceShared::_use_optimized_module_handling = true;
122 int volatile MetaspaceShared::_preimage_static_archive_dumped = 0;
123 jlong MetaspaceShared::_preimage_static_archive_recording_duration = 0;
124
125 // The CDS archive is divided into the following regions:
126 // rw - read-write metadata
127 // ro - read-only metadata and read-only tables
128 // hp - heap region
129 // bm - bitmap for relocating the above 7 regions.
130 //
131 // The rw and ro regions are linearly allocated, in the order of rw->ro.
132 // These regions are aligned with MetaspaceShared::core_region_alignment().
133 //
134 // These 2 regions are populated in the following steps:
135 // [0] All classes are loaded in MetaspaceShared::preload_classes(). All metadata are
136 // temporarily allocated outside of the shared regions.
137 // [1] We enter a safepoint and allocate a buffer for the rw/ro regions.
138 // [2] C++ vtables are copied into the rw region.
139 // [3] ArchiveBuilder copies RW metadata into the rw region.
140 // [4] ArchiveBuilder copies RO metadata into the ro region.
141 // [5] SymbolTable, StringTable, SystemDictionary, and a few other read-only data
142 // are copied into the ro region as read-only tables.
143 //
144 // The heap region is written by HeapShared::write_heap().
145 //
146 // The bitmap region is used to relocate the ro/rw/hp regions.
147
148 static DumpRegion _symbol_region("symbols");
149
150 char* MetaspaceShared::symbol_space_alloc(size_t num_bytes) {
151 return _symbol_region.allocate(num_bytes);
152 }
153
154 // os::vm_allocation_granularity() is usually 4K for most OSes. However, some platforms
155 // such as linux-aarch64 and macos-x64 ...
156 // it can be either 4K or 64K and on macos-aarch64 it is 16K. To generate archives that are
157 // compatible for both settings, an alternative cds core region alignment can be enabled
158 // at building time:
159 // --enable-compactible-cds-alignment
160 // Upon successful configuration, the compactible alignment then can be defined in:
161 // os_linux_aarch64.cpp
162 // os_bsd_x86.cpp
163 size_t MetaspaceShared::core_region_alignment() {
164 return os::cds_core_region_alignment();
165 }
166
167 size_t MetaspaceShared::protection_zone_size() {
168 return os::cds_core_region_alignment();
169 }
170
171 static bool shared_base_valid(char* shared_base) {
172 // We check user input for SharedBaseAddress at dump time.
173
174 // At CDS runtime, "shared_base" will be the (attempted) mapping start. It will also
175 // be the encoding base, since the headers of archived base objects (and with Lilliput,
176 // the prototype mark words) carry pre-computed narrow Klass IDs that refer to the mapping
177 // start as base.
178 //
179 // On AARCH64, The "shared_base" may not be later usable as encoding base, depending on the
180 // total size of the reserved area and the precomputed_narrow_klass_shift. This is checked
181 // before reserving memory. Here we weed out values already known to be invalid later.
182 return AARCH64_ONLY(is_aligned(shared_base, 4 * G)) NOT_AARCH64(true);
183 }
184
185 class DumpClassListCLDClosure : public CLDClosure {
186 static const int INITIAL_TABLE_SIZE = 1987;
187 static const int MAX_TABLE_SIZE = 61333;
188
189 fileStream *_stream;
190 ResizeableResourceHashtable<InstanceKlass*, bool,
191 AnyObj::C_HEAP, mtClassShared> _dumped_classes;
192
193 void dump(InstanceKlass* ik) {
194 bool created;
195 _dumped_classes.put_if_absent(ik, &created);
196 if (!created) {
197 return;
198 }
199 if (_dumped_classes.maybe_grow()) {
200 log_info(cds, hashtables)("Expanded _dumped_classes table to %d", _dumped_classes.table_size());
201 }
202 if (ik->java_super()) {
203 dump(ik->java_super());
204 }
205 Array<InstanceKlass*>* interfaces = ik->local_interfaces();
206 int len = interfaces->length();
207 for (int i = 0; i < len; i++) {
208 dump(interfaces->at(i));
209 }
210 ClassListWriter::write_to_stream(ik, _stream);
211 }
212
213 public:
214 DumpClassListCLDClosure(fileStream* f)
215 : CLDClosure(), _dumped_classes(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE) {
216 _stream = f;
217 }
218
219 void do_cld(ClassLoaderData* cld) {
220 for (Klass* klass = cld->klasses(); klass != nullptr; klass = klass->next_link()) {
221 if (klass->is_instance_klass()) {
222 dump(InstanceKlass::cast(klass));
223 }
224 }
225 }
226 };
227
228 void MetaspaceShared::dump_loaded_classes(const char* file_name, TRAPS) {
229 fileStream stream(file_name, "w");
230 if (stream.is_open()) {
231 MutexLocker lock(ClassLoaderDataGraph_lock);
232 MutexLocker lock2(ClassListFile_lock, Mutex::_no_safepoint_check_flag);
233 DumpClassListCLDClosure collect_classes(&stream);
234 ClassLoaderDataGraph::loaded_cld_do(&collect_classes);
235 } else {
236 THROW_MSG(vmSymbols::java_io_IOException(), "Failed to open file");
237 }
238 }
239
240 static bool shared_base_too_high(char* specified_base, char* aligned_base, size_t cds_max) {
241 // Caller should have checked that aligned_base was successfully aligned and is not nullptr.
242 // Comparing specified_base with nullptr is UB.
243 assert(aligned_base != nullptr, "sanity");
244 assert(aligned_base >= specified_base, "sanity");
245
246 if (max_uintx - uintx(aligned_base) < uintx(cds_max)) {
247 // Not enough address space to hold an archive of cds_max bytes from aligned_base.
248 return true;
249 } else {
250 return false;
251 }
252 }
253
254 static char* compute_shared_base(size_t cds_max) {
255 char* specified_base = (char*)SharedBaseAddress;
256 size_t alignment = MetaspaceShared::core_region_alignment();
257 if (UseCompressedClassPointers) {
258 alignment = MAX2(alignment, Metaspace::reserve_alignment());
259 }
260
261 if (SharedBaseAddress == 0) {
262 // Special meaning of -XX:SharedBaseAddress=0 -> Always map archive at os-selected address.
263 return specified_base;
264 }
265
266 char* aligned_base = can_align_up(specified_base, alignment)
267 ? align_up(specified_base, alignment)
268 : nullptr;
269
270 if (aligned_base != specified_base) {
271 log_info(cds)("SharedBaseAddress (" INTPTR_FORMAT ") aligned up to " INTPTR_FORMAT,
272 p2i(specified_base), p2i(aligned_base));
273 }
274
275 const char* err = nullptr;
276 if (aligned_base == nullptr) {
277 err = "too high";
278 } else if (shared_base_too_high(specified_base, aligned_base, cds_max)) {
279 err = "too high";
280 } else if (!shared_base_valid(aligned_base)) {
281 err = "invalid for this platform";
282 } else {
283 return aligned_base;
284 }
285
286 // Arguments::default_SharedBaseAddress() is hard-coded in cds_globals.hpp. It must be carefully
287 // picked that (a) the align_up() below will always return a valid value; (b) none of
288 // the following asserts will fail.
289 log_warning(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is %s. Reverted to " INTPTR_FORMAT,
290 p2i((void*)SharedBaseAddress), err,
291 p2i((void*)Arguments::default_SharedBaseAddress()));
292
293 specified_base = (char*)Arguments::default_SharedBaseAddress();
294 aligned_base = align_up(specified_base, alignment);
295
296 // Make sure the default value of SharedBaseAddress specified in globals.hpp is sane.
297 assert(!shared_base_too_high(specified_base, aligned_base, cds_max), "Sanity");
298 assert(shared_base_valid(aligned_base), "Sanity");
299 return aligned_base;
300 }
301
302 void MetaspaceShared::initialize_for_static_dump() {
303 assert(CDSConfig::is_dumping_static_archive(), "sanity");
304
305 if (CDSConfig::is_dumping_preimage_static_archive() || CDSConfig::is_dumping_final_static_archive()) {
306 if (!((UseG1GC || UseParallelGC || UseSerialGC || UseEpsilonGC || UseShenandoahGC) && UseCompressedClassPointers)) {
307 const char* error;
308 if (CDSConfig::is_experimental_leyden_workflow()) {
309 error = "Cannot create the CacheDataStore";
310 } else if (CDSConfig::is_dumping_preimage_static_archive()) {
311 error = "Cannot create the AOT configuration file";
312 } else {
313 error = "Cannot create the AOT cache";
314 }
315
316 vm_exit_during_initialization(error,
317 "UseCompressedClassPointers must be enabled, and collector must be G1, Parallel, Serial, Epsilon, or Shenandoah");
318 }
319 }
320
321 log_info(cds)("Core region alignment: %zu", core_region_alignment());
322 // The max allowed size for CDS archive. We use this to limit SharedBaseAddress
323 // to avoid address space wrap around.
324 size_t cds_max;
325 const size_t reserve_alignment = core_region_alignment();
326
327 #ifdef _LP64
328 const uint64_t UnscaledClassSpaceMax = (uint64_t(max_juint) + 1);
329 cds_max = align_down(UnscaledClassSpaceMax, reserve_alignment);
330 #else
331 // We don't support archives larger than 256MB on 32-bit due to limited
332 // virtual address space.
333 cds_max = align_down(256*M, reserve_alignment);
334 #endif
335
336 _requested_base_address = compute_shared_base(cds_max);
337 SharedBaseAddress = (size_t)_requested_base_address;
338
339 size_t symbol_rs_size = LP64_ONLY(3 * G) NOT_LP64(128 * M);
340 _symbol_rs = MemoryReserver::reserve(symbol_rs_size,
341 os::vm_allocation_granularity(),
342 os::vm_page_size(),
343 mtClassShared);
344 if (!_symbol_rs.is_reserved()) {
345 log_error(cds)("Unable to reserve memory for symbols: %zu bytes.", symbol_rs_size);
346 MetaspaceShared::unrecoverable_writing_error();
347 }
348 _symbol_region.init(&_symbol_rs, &_symbol_vs);
349 }
350
351 // Called by universe_post_init()
352 void MetaspaceShared::post_initialize(TRAPS) {
353 if (CDSConfig::is_using_archive()) {
354 int size = AOTClassLocationConfig::runtime()->length();
355 if (size > 0) {
356 CDSProtectionDomain::allocate_shared_data_arrays(size, CHECK);
357 }
358 }
359 }
360
361 // Extra java.lang.Strings to be added to the archive
362 static GrowableArrayCHeap<OopHandle, mtClassShared>* _extra_interned_strings = nullptr;
363 // Extra Symbols to be added to the archive
364 static GrowableArrayCHeap<Symbol*, mtClassShared>* _extra_symbols = nullptr;
365 // Methods managed by SystemDictionary::find_method_handle_intrinsic() to be added to the archive
366 static GrowableArray<Method*>* _pending_method_handle_intrinsics = nullptr;
367
368 void MetaspaceShared::read_extra_data(JavaThread* current, const char* filename) {
369 _extra_interned_strings = new GrowableArrayCHeap<OopHandle, mtClassShared>(10000);
370 _extra_symbols = new GrowableArrayCHeap<Symbol*, mtClassShared>(1000);
371
372 HashtableTextDump reader(filename);
373 reader.check_version("VERSION: 1.0");
374
375 while (reader.remain() > 0) {
376 int utf8_length;
377 int prefix_type = reader.scan_prefix(&utf8_length);
378 ResourceMark rm(current);
379 if (utf8_length == 0x7fffffff) {
380 // buf_len will overflown 32-bit value.
381 log_error(cds)("string length too large: %d", utf8_length);
382 MetaspaceShared::unrecoverable_loading_error();
383 }
384 int buf_len = utf8_length+1;
385 char* utf8_buffer = NEW_RESOURCE_ARRAY(char, buf_len);
386 reader.get_utf8(utf8_buffer, utf8_length);
387 utf8_buffer[utf8_length] = '\0';
388
389 if (prefix_type == HashtableTextDump::SymbolPrefix) {
390 _extra_symbols->append(SymbolTable::new_permanent_symbol(utf8_buffer));
391 } else{
392 assert(prefix_type == HashtableTextDump::StringPrefix, "Sanity");
393 ExceptionMark em(current);
394 JavaThread* THREAD = current; // For exception macros.
395 oop str = StringTable::intern(utf8_buffer, THREAD);
396
397 if (HAS_PENDING_EXCEPTION) {
398 log_warning(cds, heap)("[line %d] extra interned string allocation failed; size too large: %d",
399 reader.last_line_no(), utf8_length);
400 CLEAR_PENDING_EXCEPTION;
401 } else {
402 #if INCLUDE_CDS_JAVA_HEAP
403 if (ArchiveHeapWriter::is_string_too_large_to_archive(str)) {
404 log_warning(cds, heap)("[line %d] extra interned string ignored; size too large: %d",
405 reader.last_line_no(), utf8_length);
406 continue;
407 }
408 // Make sure this string is included in the dumped interned string table.
409 assert(str != nullptr, "must succeed");
410 _extra_interned_strings->append(OopHandle(Universe::vm_global(), str));
411 #endif
412 }
413 }
414 }
415 }
416
417 void MetaspaceShared::make_method_handle_intrinsics_shareable() {
418 for (int i = 0; i < _pending_method_handle_intrinsics->length(); i++) {
419 Method* m = ArchiveBuilder::current()->get_buffered_addr(_pending_method_handle_intrinsics->at(i));
420 m->remove_unshareable_info();
421 // Each method has its own constant pool (which is distinct from m->method_holder()->constants());
422 m->constants()->remove_unshareable_info();
423 }
424 }
425
426 void MetaspaceShared::write_method_handle_intrinsics() {
427 int len = _pending_method_handle_intrinsics->length();
428 _archived_method_handle_intrinsics = ArchiveBuilder::new_ro_array<Method*>(len);
429 int word_size = _archived_method_handle_intrinsics->size();
430 for (int i = 0; i < len; i++) {
431 Method* m = _pending_method_handle_intrinsics->at(i);
432 ArchiveBuilder::current()->write_pointer_in_buffer(_archived_method_handle_intrinsics->adr_at(i), m);
433 word_size += m->size() + m->constMethod()->size() + m->constants()->size();
434 if (m->constants()->cache() != nullptr) {
435 word_size += m->constants()->cache()->size();
436 }
437 }
438 log_info(cds)("Archived %d method handle intrinsics (%d bytes)", len, word_size * BytesPerWord);
439 }
440
441 // About "serialize" --
442 //
443 // This is (probably a badly named) way to read/write a data stream of pointers and
444 // miscellaneous data from/to the shared archive file. The usual code looks like this:
445 //
446 // // These two global C++ variables are initialized during dump time.
447 // static int _archived_int;
448 // static MetaspaceObj* archived_ptr;
449 //
450 // void MyClass::serialize(SerializeClosure* soc) {
451 // soc->do_int(&_archived_int);
452 // soc->do_int(&_archived_ptr);
453 // }
454 //
455 // At dumptime, these two variables are stored into the CDS archive.
456 // At runtime, these two variables are loaded from the CDS archive.
457 // In addition, the pointer is relocated as necessary.
458 //
459 // Some of the xxx::serialize() functions may have side effects and assume that
460 // the archive is already mapped. For example, SymbolTable::serialize_shared_table_header()
461 // unconditionally makes the set of archived symbols available. Therefore, we put most
462 // of these xxx::serialize() functions inside MetaspaceShared::serialize(), which
463 // is called AFTER we made the decision to map the archive.
464 //
465 // However, some of the "serialized" data are used to decide whether an archive should
466 // be mapped or not (e.g., for checking if the -Djdk.module.main property is compatible
467 // with the archive). The xxx::serialize() functions for these data must be put inside
468 // MetaspaceShared::early_serialize(). Such functions must not produce side effects that
469 // assume we will always decides to map the archive.
470
471 void MetaspaceShared::early_serialize(SerializeClosure* soc) {
472 int tag = 0;
473 soc->do_tag(--tag);
474 CDS_JAVA_HEAP_ONLY(Modules::serialize_archived_module_info(soc);)
475 soc->do_tag(666);
476 }
477
478 void MetaspaceShared::serialize(SerializeClosure* soc) {
479 int tag = 0;
480 soc->do_tag(--tag);
481
482 // Verify the sizes of various metadata in the system.
483 soc->do_tag(sizeof(Method));
484 soc->do_tag(sizeof(ConstMethod));
485 soc->do_tag(arrayOopDesc::base_offset_in_bytes(T_BYTE));
486 soc->do_tag(sizeof(ConstantPool));
487 soc->do_tag(sizeof(ConstantPoolCache));
488 soc->do_tag(objArrayOopDesc::base_offset_in_bytes());
489 soc->do_tag(typeArrayOopDesc::base_offset_in_bytes(T_BYTE));
490 soc->do_tag(sizeof(Symbol));
491
492 // Need to do this first, as subsequent steps may call virtual functions
493 // in archived Metadata objects.
494 CppVtables::serialize(soc);
495 soc->do_tag(--tag);
496
497 // Dump/restore miscellaneous metadata.
498 JavaClasses::serialize_offsets(soc);
499 Universe::serialize(soc);
500 soc->do_tag(--tag);
501
502 // Dump/restore references to commonly used names and signatures.
503 vmSymbols::serialize(soc);
504 soc->do_tag(--tag);
505
506 // Dump/restore the symbol/string/subgraph_info tables
507 SymbolTable::serialize_shared_table_header(soc);
508 StringTable::serialize_shared_table_header(soc);
509 HeapShared::serialize_tables(soc);
510 SystemDictionaryShared::serialize_dictionary_headers(soc);
511 AOTLinkedClassBulkLoader::serialize(soc, true);
512 FinalImageRecipes::serialize(soc);
513 TrainingData::serialize(soc);
514 InstanceMirrorKlass::serialize_offsets(soc);
515
516 // Dump/restore well known classes (pointers)
517 SystemDictionaryShared::serialize_vm_classes(soc);
518 soc->do_tag(--tag);
519
520 CDS_JAVA_HEAP_ONLY(ClassLoaderDataShared::serialize(soc);)
521 soc->do_ptr((void**)&_archived_method_handle_intrinsics);
522
523 LambdaFormInvokers::serialize(soc);
524 AdapterHandlerLibrary::serialize_shared_table_header(soc);
525
526 soc->do_tag(666);
527 }
528
529 static void rewrite_nofast_bytecode(const methodHandle& method) {
530 BytecodeStream bcs(method);
531 while (!bcs.is_last_bytecode()) {
532 Bytecodes::Code opcode = bcs.next();
533 switch (opcode) {
534 case Bytecodes::_getfield: *bcs.bcp() = Bytecodes::_nofast_getfield; break;
535 case Bytecodes::_putfield: *bcs.bcp() = Bytecodes::_nofast_putfield; break;
536 case Bytecodes::_aload_0: *bcs.bcp() = Bytecodes::_nofast_aload_0; break;
537 case Bytecodes::_iload: {
538 if (!bcs.is_wide()) {
539 *bcs.bcp() = Bytecodes::_nofast_iload;
540 }
541 break;
542 }
543 default: break;
544 }
545 }
546 }
547
548 // [1] Rewrite all bytecodes as needed, so that the ConstMethod* will not be modified
549 // at run time by RewriteBytecodes/RewriteFrequentPairs
550 // [2] Assign a fingerprint, so one doesn't need to be assigned at run-time.
551 void MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread* thread, InstanceKlass* ik) {
552 for (int i = 0; i < ik->methods()->length(); i++) {
553 methodHandle m(thread, ik->methods()->at(i));
554 if (ik->can_be_verified_at_dumptime() && ik->is_linked()) {
555 rewrite_nofast_bytecode(m);
556 }
557 Fingerprinter fp(m);
558 // The side effect of this call sets method's fingerprint field.
559 fp.fingerprint();
560 }
561 }
562
563 class VM_PopulateDumpSharedSpace : public VM_Operation {
564 private:
565 ArchiveHeapInfo _heap_info;
566 FileMapInfo* _map_info;
567 StaticArchiveBuilder& _builder;
568
569 void dump_java_heap_objects();
570 void dump_shared_symbol_table(GrowableArray<Symbol*>* symbols) {
571 log_info(cds)("Dumping symbol table ...");
572 SymbolTable::write_to_archive(symbols);
573 }
574 char* dump_early_read_only_tables();
575 char* dump_read_only_tables(AOTClassLocationConfig*& cl_config);
576
577 public:
578
579 VM_PopulateDumpSharedSpace(StaticArchiveBuilder& b) :
580 VM_Operation(), _heap_info(), _map_info(nullptr), _builder(b) {}
581
582 bool skip_operation() const { return false; }
583
584 VMOp_Type type() const { return VMOp_PopulateDumpSharedSpace; }
585 ArchiveHeapInfo* heap_info() { return &_heap_info; }
586 FileMapInfo* map_info() const { return _map_info; }
587 void doit(); // outline because gdb sucks
588 bool allow_nested_vm_operations() const { return true; }
589 }; // class VM_PopulateDumpSharedSpace
590
591 class StaticArchiveBuilder : public ArchiveBuilder {
592 public:
593 StaticArchiveBuilder() : ArchiveBuilder() {}
594
595 virtual void iterate_roots(MetaspaceClosure* it) {
596 AOTArtifactFinder::all_cached_classes_do(it);
597 SystemDictionaryShared::dumptime_classes_do(it);
598 Universe::metaspace_pointers_do(it);
599 vmSymbols::metaspace_pointers_do(it);
600 TrainingData::iterate_roots(it);
601
602 // The above code should find all the symbols that are referenced by the
603 // archived classes. We just need to add the extra symbols which
604 // may not be used by any of the archived classes -- these are usually
605 // symbols that we anticipate to be used at run time, so we can store
606 // them in the RO region, to be shared across multiple processes.
607 if (_extra_symbols != nullptr) {
608 for (int i = 0; i < _extra_symbols->length(); i++) {
609 it->push(_extra_symbols->adr_at(i));
610 }
611 }
612
613 for (int i = 0; i < _pending_method_handle_intrinsics->length(); i++) {
614 it->push(_pending_method_handle_intrinsics->adr_at(i));
615 }
616 }
617 };
618
619 char* VM_PopulateDumpSharedSpace::dump_early_read_only_tables() {
620 ArchiveBuilder::OtherROAllocMark mark;
621
622 CDS_JAVA_HEAP_ONLY(Modules::dump_archived_module_info());
623
624 DumpRegion* ro_region = ArchiveBuilder::current()->ro_region();
625 char* start = ro_region->top();
626 WriteClosure wc(ro_region);
627 MetaspaceShared::early_serialize(&wc);
628 return start;
629 }
630
631 char* VM_PopulateDumpSharedSpace::dump_read_only_tables(AOTClassLocationConfig*& cl_config) {
632 ArchiveBuilder::OtherROAllocMark mark;
633
634 SystemDictionaryShared::write_to_archive();
635 cl_config = AOTClassLocationConfig::dumptime()->write_to_archive();
636 AOTClassLinker::write_to_archive();
637 if (CDSConfig::is_dumping_preimage_static_archive()) {
638 FinalImageRecipes::record_recipes();
639 }
640
641 TrainingData::dump_training_data();
642
643 MetaspaceShared::write_method_handle_intrinsics();
644
645 // Write lambform lines into archive
646 LambdaFormInvokers::dump_static_archive_invokers();
647
648 if (AOTCodeCache::is_dumping_adapter()) {
649 AdapterHandlerLibrary::dump_aot_adapter_table();
650 }
651
652 // Write the other data to the output array.
653 DumpRegion* ro_region = ArchiveBuilder::current()->ro_region();
654 char* start = ro_region->top();
655 WriteClosure wc(ro_region);
656 MetaspaceShared::serialize(&wc);
657
658 return start;
659 }
660
661 void VM_PopulateDumpSharedSpace::doit() {
662 if (!CDSConfig::is_dumping_final_static_archive()) {
663 guarantee(!CDSConfig::is_using_archive(), "We should not be using an archive when we dump");
664 }
665
666 DEBUG_ONLY(SystemDictionaryShared::NoClassLoadingMark nclm);
667
668 _pending_method_handle_intrinsics = new (mtClassShared) GrowableArray<Method*>(256, mtClassShared);
669 if (CDSConfig::is_dumping_method_handles()) {
670 // When dumping AOT-linked classes, some classes may have direct references to a method handle
671 // intrinsic. The easiest thing is to save all of them into the AOT cache.
672 SystemDictionary::get_all_method_handle_intrinsics(_pending_method_handle_intrinsics);
673 }
674
675 AOTClassLocationConfig::dumptime_check_nonempty_dirs();
676
677 NOT_PRODUCT(SystemDictionary::verify();)
678
679 // Block concurrent class unloading from changing the _dumptime_table
680 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
681
682 #if INCLUDE_CDS_JAVA_HEAP
683 if (CDSConfig::is_dumping_heap() && _extra_interned_strings != nullptr) {
684 for (int i = 0; i < _extra_interned_strings->length(); i ++) {
685 OopHandle string = _extra_interned_strings->at(i);
686 HeapShared::add_to_dumped_interned_strings(string.resolve());
687 }
688 }
689 #endif
690
691 _builder.gather_source_objs();
692 _builder.reserve_buffer();
693
694 CppVtables::dumptime_init(&_builder);
695
696 _builder.sort_metadata_objs();
697 _builder.dump_rw_metadata();
698 _builder.dump_ro_metadata();
699 _builder.relocate_metaspaceobj_embedded_pointers();
700
701 log_info(cds)("Make classes shareable");
702 _builder.make_klasses_shareable();
703 MetaspaceShared::make_method_handle_intrinsics_shareable();
704
705 dump_java_heap_objects();
706 dump_shared_symbol_table(_builder.symbols());
707
708 char* early_serialized_data = dump_early_read_only_tables();
709 AOTClassLocationConfig* cl_config;
710 char* serialized_data = dump_read_only_tables(cl_config);
711
712 if (CDSConfig::is_dumping_lambdas_in_legacy_mode()) {
713 log_info(cds)("Adjust lambda proxy class dictionary");
714 LambdaProxyClassDictionary::adjust_dumptime_table();
715 }
716
717 log_info(cds)("Make training data shareable");
718 _builder.make_training_data_shareable();
719
720 // The vtable clones contain addresses of the current process.
721 // We don't want to write these addresses into the archive.
722 CppVtables::zero_archived_vtables();
723
724 // Write the archive file
725 if (CDSConfig::is_dumping_final_static_archive()) {
726 FileMapInfo::free_current_info(); // FIXME: should not free current info
727 }
728 const char* static_archive = CDSConfig::output_archive_path();
729 assert(static_archive != nullptr, "sanity");
730 _map_info = new FileMapInfo(static_archive, true);
731 _map_info->populate_header(MetaspaceShared::core_region_alignment());
732 _map_info->set_early_serialized_data(early_serialized_data);
733 _map_info->set_serialized_data(serialized_data);
734 _map_info->set_cloned_vtables(CppVtables::vtables_serialized_base());
735 _map_info->header()->set_class_location_config(cl_config);
736 }
737
738 class CollectClassesForLinking : public KlassClosure {
739 GrowableArray<OopHandle> _mirrors;
740
741 public:
742 CollectClassesForLinking() : _mirrors() {
743 // ClassLoaderDataGraph::loaded_classes_do_keepalive() requires ClassLoaderDataGraph_lock.
744 // We cannot link the classes while holding this lock (or else we may run into deadlock).
745 // Therefore, we need to first collect all the classes, keeping them alive by
746 // holding onto their java_mirrors in global OopHandles. We then link the classes after
747 // releasing the lock.
748 MutexLocker lock(ClassLoaderDataGraph_lock);
749 ClassLoaderDataGraph::loaded_classes_do_keepalive(this);
750 }
751
752 ~CollectClassesForLinking() {
753 for (int i = 0; i < _mirrors.length(); i++) {
754 _mirrors.at(i).release(Universe::vm_global());
755 }
756 }
757
758 void do_cld(ClassLoaderData* cld) {
759 assert(cld->is_alive(), "must be");
760 }
761
762 void do_klass(Klass* k) {
763 if (k->is_instance_klass()) {
764 _mirrors.append(OopHandle(Universe::vm_global(), k->java_mirror()));
765 }
766 }
767
768 const GrowableArray<OopHandle>* mirrors() const { return &_mirrors; }
769 };
770
771 // Check if we can eagerly link this class at dump time, so we can avoid the
772 // runtime linking overhead (especially verification)
773 bool MetaspaceShared::may_be_eagerly_linked(InstanceKlass* ik) {
774 if (CDSConfig::preserve_all_dumptime_verification_states(ik)) {
775 assert(ik->can_be_verified_at_dumptime(), "sanity");
776 }
777 if (!ik->can_be_verified_at_dumptime()) {
778 // For old classes, try to leave them in the unlinked state, so
779 // we can still store them in the archive. They must be
780 // linked/verified at runtime.
781 return false;
782 }
783
784 if (CDSConfig::is_dumping_dynamic_archive() && ik->is_shared_unregistered_class()) {
785 // Linking of unregistered classes at this stage may cause more
786 // classes to be resolved, resulting in calls to ClassLoader.loadClass()
787 // that may not be expected by custom class loaders.
788 //
789 // It's OK to do this for the built-in loaders as we know they can
790 // tolerate this.
791 return false;
792 }
793 return true;
794 }
795
796 void MetaspaceShared::link_shared_classes(TRAPS) {
797 AOTClassLinker::initialize();
798 AOTClassInitializer::init_test_class(CHECK);
799
800 while (true) {
801 ResourceMark rm(THREAD);
802 CollectClassesForLinking collect_classes;
803 bool has_linked = false;
804 const GrowableArray<OopHandle>* mirrors = collect_classes.mirrors();
805 for (int i = 0; i < mirrors->length(); i++) {
806 OopHandle mirror = mirrors->at(i);
807 InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(mirror.resolve()));
808 if (may_be_eagerly_linked(ik)) {
809 has_linked |= try_link_class(THREAD, ik);
810 }
811 if (CDSConfig::is_dumping_heap() && ik->is_linked() && !ik->is_initialized()) {
812 AOTClassInitializer::maybe_preinit_class(ik, CHECK);
813 }
814 }
815
816 if (!has_linked) {
817 break;
818 }
819 // Class linking includes verification which may load more classes.
820 // Keep scanning until we have linked no more classes.
821 }
822
823 // Resolve constant pool entries -- we don't load any new classes during this stage
824 {
825 ResourceMark rm(THREAD);
826 CollectClassesForLinking collect_classes;
827 const GrowableArray<OopHandle>* mirrors = collect_classes.mirrors();
828 for (int i = 0; i < mirrors->length(); i++) {
829 OopHandle mirror = mirrors->at(i);
830 InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(mirror.resolve()));
831 AOTConstantPoolResolver::dumptime_resolve_constants(ik, CHECK);
832 if (CDSConfig::is_dumping_preimage_static_archive()) {
833 FinalImageRecipes::add_reflection_data_flags(ik, CHECK);
834 }
835 }
836 }
837
838 if (CDSConfig::is_dumping_final_static_archive()) {
839 FinalImageRecipes::apply_recipes(CHECK);
840 }
841 }
842
843 // Preload classes from a list, populate the shared spaces and dump to a
844 // file.
845 void MetaspaceShared::preload_and_dump(TRAPS) {
846 CDSConfig::DumperThreadMark dumper_thread_mark(THREAD);
847 ResourceMark rm(THREAD);
848 HandleMark hm(THREAD);
849
850 if (CDSConfig::is_dumping_final_static_archive() && AOTPrintTrainingInfo) {
851 tty->print_cr("==================== archived_training_data ** before dumping ====================");
852 TrainingData::print_archived_training_data_on(tty);
853 }
854
855 StaticArchiveBuilder builder;
856 preload_and_dump_impl(builder, THREAD);
857 if (HAS_PENDING_EXCEPTION) {
858 if (PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())) {
859 log_error(cds)("Out of memory. Please run with a larger Java heap, current MaxHeapSize = "
860 "%zuM", MaxHeapSize/M);
861 MetaspaceShared::writing_error();
862 } else {
863 log_error(cds)("%s: %s", PENDING_EXCEPTION->klass()->external_name(),
864 java_lang_String::as_utf8_string(java_lang_Throwable::message(PENDING_EXCEPTION)));
865 MetaspaceShared::writing_error("Unexpected exception, use -Xlog:cds,exceptions=trace for detail");
866 }
867 if (CDSConfig::is_experimental_leyden_workflow()) {
868 vm_exit(1);
869 }
870 }
871
872 if (CDSConfig::new_aot_flags_used()) {
873 if (CDSConfig::is_dumping_preimage_static_archive()) {
874 // We are in the JVM that runs the training run. Continue execution,
875 // so that it can finish all clean-up and return the correct exit
876 // code to the OS.
877 } else {
878 // The JLI launcher only recognizes the "old" -Xshare:dump flag.
879 // When the new -XX:AOTMode=create flag is used, we can't return
880 // to the JLI launcher, as the launcher will fail when trying to
881 // run the main class, which is not what we want.
882 struct stat st;
883 if (os::stat(AOTCache, &st) != 0) {
884 tty->print_cr("AOTCache creation failed: %s", AOTCache);
885 vm_exit(0);
886 } else {
887 tty->print_cr("AOTCache creation is complete: %s " INT64_FORMAT " bytes", AOTCache, (int64_t)(st.st_size));
888 vm_exit(0);
889 }
890 }
891 }
892 }
893
894 #if INCLUDE_CDS_JAVA_HEAP && defined(_LP64)
895 void MetaspaceShared::adjust_heap_sizes_for_dumping() {
896 if (!CDSConfig::is_dumping_heap() || UseCompressedOops) {
897 return;
898 }
899 // CDS heap dumping requires all string oops to have an offset
900 // from the heap bottom that can be encoded in 32-bit.
901 julong max_heap_size = (julong)(4 * G);
902
903 if (MinHeapSize > max_heap_size) {
904 log_debug(cds)("Setting MinHeapSize to 4G for CDS dumping, original size = %zuM", MinHeapSize/M);
905 FLAG_SET_ERGO(MinHeapSize, max_heap_size);
906 }
907 if (InitialHeapSize > max_heap_size) {
908 log_debug(cds)("Setting InitialHeapSize to 4G for CDS dumping, original size = %zuM", InitialHeapSize/M);
909 FLAG_SET_ERGO(InitialHeapSize, max_heap_size);
910 }
911 if (MaxHeapSize > max_heap_size) {
912 log_debug(cds)("Setting MaxHeapSize to 4G for CDS dumping, original size = %zuM", MaxHeapSize/M);
913 FLAG_SET_ERGO(MaxHeapSize, max_heap_size);
914 }
915 }
916 #endif // INCLUDE_CDS_JAVA_HEAP && _LP64
917
918 void MetaspaceShared::get_default_classlist(char* default_classlist, const size_t buf_size) {
919 const char* filesep = os::file_separator();
920 jio_snprintf(default_classlist, buf_size, "%s%slib%sclasslist",
921 Arguments::get_java_home(), filesep, filesep);
922 }
923
924 void MetaspaceShared::preload_classes(TRAPS) {
925 char default_classlist[JVM_MAXPATHLEN];
926 const char* classlist_path;
927
928 get_default_classlist(default_classlist, JVM_MAXPATHLEN);
929 if (SharedClassListFile == nullptr) {
930 classlist_path = default_classlist;
931 } else {
932 classlist_path = SharedClassListFile;
933 }
934
935 log_info(cds)("Loading classes to share ...");
936 ClassListParser::parse_classlist(classlist_path,
937 ClassListParser::_parse_all, CHECK);
938 if (ExtraSharedClassListFile) {
939 ClassListParser::parse_classlist(ExtraSharedClassListFile,
940 ClassListParser::_parse_all, CHECK);
941 }
942 if (classlist_path != default_classlist) {
943 struct stat statbuf;
944 if (os::stat(default_classlist, &statbuf) == 0) {
945 // File exists, let's use it.
946 ClassListParser::parse_classlist(default_classlist,
947 ClassListParser::_parse_lambda_forms_invokers_only, CHECK);
948 }
949 }
950
951 // Some classes are used at CDS runtime but are not loaded, and therefore archived, at
952 // dumptime. We can perform dummmy calls to these classes at dumptime to ensure they
953 // are archived.
954 exercise_runtime_cds_code(CHECK);
955
956 log_info(cds)("Loading classes to share: done.");
957 }
958
959 void MetaspaceShared::exercise_runtime_cds_code(TRAPS) {
960 // Exercise the manifest processing code
961 const char* dummy = "Manifest-Version: 1.0\n";
962 CDSProtectionDomain::create_jar_manifest(dummy, strlen(dummy), CHECK);
963
964 // Exercise FileSystem and URL code
965 CDSProtectionDomain::to_file_URL("dummy.jar", Handle(), CHECK);
966 }
967
968 bool MetaspaceShared::is_recording_preimage_static_archive() {
969 if (CDSConfig::is_dumping_preimage_static_archive()) {
970 return _preimage_static_archive_dumped == 0;
971 }
972 return false;
973 }
974
975 jlong MetaspaceShared::get_preimage_static_archive_recording_duration() {
976 if (CDSConfig::is_dumping_preimage_static_archive()) {
977 if (_preimage_static_archive_recording_duration == 0) {
978 // The recording has not yet finished so return the current elapsed time.
979 return Management::ticks_to_ms(os::elapsed_counter());
980 }
981 return _preimage_static_archive_recording_duration;
982 }
983 return 0;
984 }
985
986 void MetaspaceShared::preload_and_dump_impl(StaticArchiveBuilder& builder, TRAPS) {
987 if (CDSConfig::is_dumping_preimage_static_archive()) {
988 if (Atomic::cmpxchg(&_preimage_static_archive_dumped, 0, 1) != 0) {
989 return;
990 }
991 _preimage_static_archive_recording_duration = Management::ticks_to_ms(os::elapsed_counter());
992 }
993
994 if (CDSConfig::is_dumping_classic_static_archive()) {
995 // We are running with -Xshare:dump
996 preload_classes(CHECK);
997
998 if (SharedArchiveConfigFile) {
999 log_info(cds)("Reading extra data from %s ...", SharedArchiveConfigFile);
1000 read_extra_data(THREAD, SharedArchiveConfigFile);
1001 log_info(cds)("Reading extra data: done.");
1002 }
1003 }
1004
1005 if (CDSConfig::is_dumping_preimage_static_archive()) {
1006 log_info(cds)("Reading lambda form invokers from JDK default classlist ...");
1007 char default_classlist[JVM_MAXPATHLEN];
1008 get_default_classlist(default_classlist, JVM_MAXPATHLEN);
1009 struct stat statbuf;
1010 if (os::stat(default_classlist, &statbuf) == 0) {
1011 ClassListParser::parse_classlist(default_classlist,
1012 ClassListParser::_parse_lambda_forms_invokers_only, CHECK);
1013 }
1014 }
1015
1016 #if INCLUDE_CDS_JAVA_HEAP
1017 if (CDSConfig::is_dumping_heap()) {
1018 assert(CDSConfig::allow_only_single_java_thread(), "Required");
1019 if (!HeapShared::is_archived_boot_layer_available(THREAD)) {
1020 log_info(cds)("archivedBootLayer not available, disabling full module graph");
1021 CDSConfig::stop_dumping_full_module_graph();
1022 }
1023 // Do this before link_shared_classes(), as the following line may load new classes.
1024 HeapShared::init_for_dumping(CHECK);
1025 }
1026 #endif
1027
1028 if (CDSConfig::is_dumping_final_static_archive()) {
1029 if (ExtraSharedClassListFile) {
1030 log_info(cds)("Loading extra classes from %s ...", ExtraSharedClassListFile);
1031 ClassListParser::parse_classlist(ExtraSharedClassListFile,
1032 ClassListParser::_parse_all, CHECK);
1033 }
1034 }
1035
1036 // Rewrite and link classes
1037 log_info(cds)("Rewriting and linking classes ...");
1038
1039 // Link any classes which got missed. This would happen if we have loaded classes that
1040 // were not explicitly specified in the classlist. E.g., if an interface implemented by class K
1041 // fails verification, all other interfaces that were not specified in the classlist but
1042 // are implemented by K are not verified.
1043 link_shared_classes(CHECK);
1044 log_info(cds)("Rewriting and linking classes: done");
1045
1046 TrainingData::init_dumptime_table(CHECK); // captures TrainingDataSetLocker
1047
1048 if (CDSConfig::is_dumping_regenerated_lambdaform_invokers()) {
1049 LambdaFormInvokers::regenerate_holder_classes(CHECK);
1050 }
1051
1052 #if INCLUDE_CDS_JAVA_HEAP
1053 if (CDSConfig::is_dumping_heap()) {
1054 ArchiveHeapWriter::init();
1055
1056 if (CDSConfig::is_dumping_full_module_graph()) {
1057 ClassLoaderDataShared::ensure_module_entry_tables_exist();
1058 HeapShared::reset_archived_object_states(CHECK);
1059 }
1060
1061 if (ArchiveLoaderLookupCache) {
1062 SystemDictionaryShared::create_loader_positive_lookup_cache(CHECK);
1063 }
1064
1065 AOTReferenceObjSupport::initialize(CHECK);
1066 AOTReferenceObjSupport::stabilize_cached_reference_objects(CHECK);
1067
1068 if (CDSConfig::is_initing_classes_at_dump_time()) {
1069 // java.lang.Class::reflectionFactory cannot be archived yet. We set this field
1070 // to null, and it will be initialized again at runtime.
1071 log_debug(cds)("Resetting Class::reflectionFactory");
1072 TempNewSymbol method_name = SymbolTable::new_symbol("resetArchivedStates");
1073 Symbol* method_sig = vmSymbols::void_method_signature();
1074 JavaValue result(T_VOID);
1075 JavaCalls::call_static(&result, vmClasses::Class_klass(),
1076 method_name, method_sig, CHECK);
1077
1078 // Perhaps there is a way to avoid hard-coding these names here.
1079 // See discussion in JDK-8342481.
1080 }
1081
1082 // Do this at the very end, when no Java code will be executed. Otherwise
1083 // some new strings may be added to the intern table.
1084 StringTable::allocate_shared_strings_array(CHECK);
1085 } else {
1086 log_info(cds)("Not dumping heap, reset CDSConfig::_is_using_optimized_module_handling");
1087 CDSConfig::stop_using_optimized_module_handling();
1088 }
1089 #endif
1090
1091 VM_PopulateDumpSharedSpace op(builder);
1092 VMThread::execute(&op);
1093 FileMapInfo* mapinfo = op.map_info();
1094 ArchiveHeapInfo* heap_info = op.heap_info();
1095
1096 if (CDSConfig::is_dumping_final_static_archive()) {
1097 if (AOTCodeCache::is_caching_enabled()) {
1098 if (log_is_enabled(Info, cds, jit)) {
1099 AOTCacheAccess::test_heap_access_api();
1100 }
1101
1102 // We have just created the final image. Let's run the AOT compiler
1103 if (AOTPrintTrainingInfo) {
1104 tty->print_cr("==================== archived_training_data ** after dumping ====================");
1105 TrainingData::print_archived_training_data_on(tty);
1106 }
1107
1108 CDSConfig::enable_dumping_aot_code();
1109 {
1110 builder.start_ac_region();
1111 Precompiler::compile_cached_code(&builder, CHECK);
1112 // Write the contents to aot code region and close AOTCodeCache before packing the region
1113 AOTCodeCache::close();
1114 builder.end_ac_region();
1115 }
1116 CDSConfig::disable_dumping_aot_code();
1117 }
1118 }
1119
1120 bool status = write_static_archive(&builder, mapinfo, heap_info);
1121 if (status && CDSConfig::is_dumping_preimage_static_archive()) {
1122 if (CDSConfig::is_experimental_leyden_workflow()) {
1123 fork_and_dump_final_static_archive_experimental_leyden_workflow(CHECK);
1124 } else {
1125 tty->print_cr("%s AOTConfiguration recorded: %s",
1126 CDSConfig::has_temp_aot_config_file() ? "Temporary" : "", AOTConfiguration);
1127 if (CDSConfig::is_one_step_training()) {
1128 fork_and_dump_final_static_archive(CHECK);
1129 }
1130 }
1131 }
1132
1133 if (!status) {
1134 THROW_MSG(vmSymbols::java_io_IOException(), "Encountered error while dumping");
1135 }
1136 }
1137
1138 bool MetaspaceShared::write_static_archive(ArchiveBuilder* builder, FileMapInfo* map_info, ArchiveHeapInfo* heap_info) {
1139 // relocate the data so that it can be mapped to MetaspaceShared::requested_base_address()
1140 // without runtime relocation.
1141 builder->relocate_to_requested();
1142
1143 map_info->open_as_output();
1144 if (!map_info->is_open()) {
1145 return false;
1146 }
1147 builder->write_archive(map_info, heap_info);
1148
1149 if (AllowArchivingWithJavaAgent) {
1150 log_warning(cds)("This %s was created with AllowArchivingWithJavaAgent. It should be used "
1151 "for testing purposes only and should not be used in a production environment", CDSConfig::type_of_archive_being_loaded());
1152 }
1153 return true;
1154 }
1155
1156 static void print_java_launcher(outputStream* st) {
1157 st->print("%s%sbin%sjava", Arguments::get_java_home(), os::file_separator(), os::file_separator());
1158 }
1159
1160 static void append_args(GrowableArray<Handle>* args, const char* arg, TRAPS) {
1161 Handle string = java_lang_String::create_from_str(arg, CHECK);
1162 args->append(string);
1163 }
1164
1165 // Pass all options in Arguments::jvm_args_array() to a child JVM process
1166 // using the JAVA_TOOL_OPTIONS environment variable.
1167 static int exec_jvm_with_java_tool_options(const char* java_launcher_path, TRAPS) {
1168 ResourceMark rm(THREAD);
1169 HandleMark hm(THREAD);
1170 GrowableArray<Handle> args;
1171
1172 const char* cp = Arguments::get_appclasspath();
1173 if (cp != nullptr && strlen(cp) > 0 && strcmp(cp, ".") != 0) {
1174 // We cannot use "-cp", because "-cp" is only interpreted by the java launcher,
1175 // and is not interpreter by arguments.cpp when it loads args from JAVA_TOOL_OPTIONS
1176 stringStream ss;
1177 ss.print("-Djava.class.path=");
1178 ss.print_raw(cp);
1179 append_args(&args, ss.freeze(), CHECK_0);
1180 // CDS$ProcessLauncher::execWithJavaToolOptions() must unset CLASSPATH, which has
1181 // a higher priority than -Djava.class.path=
1182 }
1183
1184 // Pass all arguments. These include those from JAVA_TOOL_OPTIONS and _JAVA_OPTIONS.
1185 for (int i = 0; i < Arguments::num_jvm_args(); i++) {
1186 const char* arg = Arguments::jvm_args_array()[i];
1187 if (strncmp("-XX:AOTMode", arg, 11) == 0) {
1188 // Filter it out. We will set AOTMode=create below.
1189 } else {
1190 append_args(&args, arg, CHECK_0);
1191 }
1192 }
1193
1194 // We don't pass Arguments::jvm_flags_array(), as those will be added by
1195 // the child process when it loads .hotspotrc
1196
1197 if (CDSConfig::is_experimental_leyden_workflow()) {
1198 stringStream ss;
1199 ss.print("-XX:CDSPreimage=");
1200 ss.print_raw(CDSPreimage);
1201 append_args(&args, ss.freeze(), CHECK_0);
1202 } else {
1203 if (CDSConfig::has_temp_aot_config_file()) {
1204 stringStream ss;
1205 ss.print("-XX:AOTConfiguration=");
1206 ss.print_raw(AOTConfiguration);
1207 append_args(&args, ss.freeze(), CHECK_0);
1208 }
1209 append_args(&args, "-XX:AOTMode=create", CHECK_0);
1210 }
1211
1212 Symbol* klass_name = SymbolTable::new_symbol("jdk/internal/misc/CDS$ProcessLauncher");
1213 Klass* k = SystemDictionary::resolve_or_fail(klass_name, true, CHECK_0);
1214 Symbol* methodName = SymbolTable::new_symbol("execWithJavaToolOptions");
1215 Symbol* methodSignature = SymbolTable::new_symbol("(Ljava/lang/String;[Ljava/lang/String;)I");
1216
1217 Handle launcher = java_lang_String::create_from_str(java_launcher_path, CHECK_0);
1218 objArrayOop array = oopFactory::new_objArray(vmClasses::String_klass(), args.length(), CHECK_0);
1219 for (int i = 0; i < args.length(); i++) {
1220 array->obj_at_put(i, args.at(i)());
1221 }
1222 objArrayHandle launcher_args(THREAD, array);
1223
1224 // The following call will pass all options inside the JAVA_TOOL_OPTIONS env variable to
1225 // the child process. It will also clear the _JAVA_OPTIONS and CLASSPATH env variables for
1226 // the child process.
1227 //
1228 // Note: the env variables are set only for the child process. They are not changed
1229 // for the current process. See java.lang.ProcessBuilder::environment().
1230 JavaValue result(T_OBJECT);
1231 JavaCallArguments javacall_args(2);
1232 javacall_args.push_oop(launcher);
1233 javacall_args.push_oop(launcher_args);
1234 JavaCalls::call_static(&result,
1235 InstanceKlass::cast(k),
1236 methodName,
1237 methodSignature,
1238 &javacall_args,
1239 CHECK_0);
1240 return result.get_jint();
1241 }
1242
1243 // This is for debugging purposes only (-XX:+CDSManualFinalImage) so we don't bother
1244 // quoating any special characters. The user should avoid using special chars.
1245 static void print_vm_arguments(outputStream* st) {
1246 const char* cp = Arguments::get_appclasspath();
1247 if (cp != nullptr && strlen(cp) > 0 && strcmp(cp, ".") != 0) {
1248 st->print(" -cp "); st->print_raw(cp);
1249 }
1250 for (int i = 0; i < Arguments::num_jvm_args(); i++) {
1251 st->print(" %s", Arguments::jvm_args_array()[i]);
1252 }
1253 }
1254
1255 void MetaspaceShared::fork_and_dump_final_static_archive_experimental_leyden_workflow(TRAPS) {
1256 assert(CDSConfig::is_dumping_preimage_static_archive(), "sanity");
1257
1258 ResourceMark rm;
1259 stringStream ss;
1260 print_java_launcher(&ss);
1261
1262 if (CDSManualFinalImage) {
1263 print_vm_arguments(&ss);
1264 ss.print(" -XX:CDSPreimage=%s", SharedArchiveFile);
1265 const char* cmd = ss.freeze();
1266
1267 tty->print_cr("-XX:+CDSManualFinalImage is specified");
1268 tty->print_cr("Please manually execute the following command to create the final CDS image:");
1269 tty->print(" "); tty->print_raw_cr(cmd);
1270
1271 // The following is useful if the dumping was trigger by a script that builds
1272 // a complex command-line.
1273 tty->print_cr("Note: to recreate the preimage only:");
1274 tty->print_cr(" rm -f %s", CacheDataStore);
1275 tty->print(" ");
1276 print_java_launcher(tty);
1277 print_vm_arguments(tty);
1278 if (Arguments::java_command() != nullptr) {
1279 tty->print(" %s", Arguments::java_command());
1280 }
1281 tty->cr();
1282 } else {
1283 const char* cmd = ss.freeze();
1284 log_info(cds)("Launching child process to create final CDS image:");
1285 log_info(cds)(" %s", cmd);
1286 int status = exec_jvm_with_java_tool_options(cmd, CHECK);
1287 if (status != 0) {
1288 log_error(cds)("Child process finished; status = %d", status);
1289 log_error(cds)("To reproduce the error");
1290 ResourceMark rm;
1291 LogStream ls(Log(cds)::error());
1292 ls.print(" "); ls.print_raw_cr(cmd);
1293
1294 // The following is useful if the dumping was trigger by a script that builds
1295 // a complex command-line.
1296 ls.print_cr("Note: to recreate the preimage only:");
1297 ls.print_cr(" rm -f %s", CacheDataStore);
1298 ls.print(" ");
1299 print_java_launcher(&ls);
1300 print_vm_arguments(&ls);
1301 ls.print(" -XX:+UnlockDiagnosticVMOptions -XX:+CDSManualFinalImage");
1302 if (Arguments::java_command() != nullptr) {
1303 ls.print(" %s", Arguments::java_command());
1304 }
1305 ls.cr();
1306
1307 vm_direct_exit(status);
1308 } else {
1309 log_info(cds)("Child process finished; status = %d", status);
1310 // On Windows, need WRITE permission to remove the file.
1311 WINDOWS_ONLY(chmod(CDSPreimage, _S_IREAD | _S_IWRITE));
1312 status = remove(CDSPreimage);
1313 if (status != 0) {
1314 log_error(cds)("Failed to remove CDSPreimage file %s", CDSPreimage);
1315 } else {
1316 log_info(cds)("Removed CDSPreimage file %s", CDSPreimage);
1317 }
1318 }
1319 }
1320 }
1321
1322 void MetaspaceShared::fork_and_dump_final_static_archive(TRAPS) {
1323 assert(CDSConfig::is_dumping_preimage_static_archive(), "sanity");
1324
1325 ResourceMark rm;
1326 stringStream ss;
1327 print_java_launcher(&ss);
1328 const char* cmd = ss.freeze();
1329 tty->print_cr("Launching child process %s to assemble AOT cache %s using configuration %s", cmd, AOTCacheOutput, AOTConfiguration);
1330 int status = exec_jvm_with_java_tool_options(cmd, CHECK);
1331 if (status != 0) {
1332 log_error(cds)("Child process failed; status = %d", status);
1333 // We leave the temp config file for debugging
1334 } else if (CDSConfig::has_temp_aot_config_file()) {
1335 const char* tmp_config = AOTConfiguration;
1336 // On Windows, need WRITE permission to remove the file.
1337 WINDOWS_ONLY(chmod(tmp_config, _S_IREAD | _S_IWRITE));
1338 status = remove(tmp_config);
1339 if (status != 0) {
1340 log_error(cds)("Failed to remove temporary AOT configuration file %s", tmp_config);
1341 } else {
1342 tty->print_cr("Removed temporary AOT configuration file %s", tmp_config);
1343 }
1344 }
1345 }
1346
1347 // Returns true if the class's status has changed.
1348 bool MetaspaceShared::try_link_class(JavaThread* current, InstanceKlass* ik) {
1349 ExceptionMark em(current);
1350 JavaThread* THREAD = current; // For exception macros.
1351 assert(CDSConfig::is_dumping_archive(), "sanity");
1352
1353 if (ik->is_shared() && !CDSConfig::is_dumping_final_static_archive()) {
1354 assert(CDSConfig::is_dumping_dynamic_archive(), "must be");
1355 return false;
1356 }
1357
1358 if (ik->is_loaded() && !ik->is_linked() && ik->can_be_verified_at_dumptime() &&
1359 !SystemDictionaryShared::has_class_failed_verification(ik)) {
1360 bool saved = BytecodeVerificationLocal;
1361 if (ik->is_shared_unregistered_class() && ik->class_loader() == nullptr) {
1362 // The verification decision is based on BytecodeVerificationRemote
1363 // for non-system classes. Since we are using the null classloader
1364 // to load non-system classes for customized class loaders during dumping,
1365 // we need to temporarily change BytecodeVerificationLocal to be the same as
1366 // BytecodeVerificationRemote. Note this can cause the parent system
1367 // classes also being verified. The extra overhead is acceptable during
1368 // dumping.
1369 BytecodeVerificationLocal = BytecodeVerificationRemote;
1370 }
1371 ik->link_class(THREAD);
1372 if (HAS_PENDING_EXCEPTION) {
1373 ResourceMark rm(THREAD);
1374 log_warning(cds)("Preload Warning: Verification failed for %s",
1375 ik->external_name());
1376 CLEAR_PENDING_EXCEPTION;
1377 SystemDictionaryShared::set_class_has_failed_verification(ik);
1378 } else {
1379 assert(!SystemDictionaryShared::has_class_failed_verification(ik), "sanity");
1380 ik->compute_has_loops_flag_for_methods();
1381 }
1382 BytecodeVerificationLocal = saved;
1383 return true;
1384 } else {
1385 return false;
1386 }
1387 }
1388
1389 void VM_PopulateDumpSharedSpace::dump_java_heap_objects() {
1390 if (CDSConfig::is_dumping_heap()) {
1391 HeapShared::write_heap(&_heap_info);
1392 } else if (!CDSConfig::is_dumping_preimage_static_archive()) {
1393 CDSConfig::log_reasons_for_not_dumping_heap();
1394 }
1395 }
1396
1397 void MetaspaceShared::set_shared_metaspace_range(void* base, void *static_top, void* top) {
1398 assert(base <= static_top && static_top <= top, "must be");
1399 _shared_metaspace_static_top = static_top;
1400 MetaspaceObj::set_shared_metaspace_range(base, top);
1401 }
1402
1403 bool MetaspaceShared::is_shared_dynamic(void* p) {
1404 if ((p < MetaspaceObj::shared_metaspace_top()) &&
1405 (p >= _shared_metaspace_static_top)) {
1406 return true;
1407 } else {
1408 return false;
1409 }
1410 }
1411
1412 bool MetaspaceShared::is_shared_static(void* p) {
1413 if (is_in_shared_metaspace(p) && !is_shared_dynamic(p)) {
1414 return true;
1415 } else {
1416 return false;
1417 }
1418 }
1419
1420 // This function is called when the JVM is unable to load the specified archive(s) due to one
1421 // of the following conditions.
1422 // - There's an error that indicates that the archive(s) files were corrupt or otherwise damaged.
1423 // - When -XX:+RequireSharedSpaces is specified, AND the JVM cannot load the archive(s) due
1424 // to version or classpath mismatch.
1425 void MetaspaceShared::unrecoverable_loading_error(const char* message) {
1426 log_error(cds)("An error has occurred while processing the %s.", CDSConfig::type_of_archive_being_loaded());
1427 if (message != nullptr) {
1428 log_error(cds)("%s", message);
1429 }
1430
1431 if (CDSConfig::is_dumping_final_static_archive()) {
1432 vm_exit_during_initialization("Must be a valid AOT configuration generated by the current JVM", AOTConfiguration);
1433 } else if (CDSConfig::new_aot_flags_used()) {
1434 vm_exit_during_initialization("Unable to use AOT cache.", nullptr);
1435 } else {
1436 vm_exit_during_initialization("Unable to use shared archive.", nullptr);
1437 }
1438 }
1439
1440 // This function is called when the JVM is unable to write the specified CDS archive due to an
1441 // unrecoverable error.
1442 void MetaspaceShared::unrecoverable_writing_error(const char* message) {
1443 writing_error(message);
1444 vm_direct_exit(1);
1445 }
1446
1447 // This function is called when the JVM is unable to write the specified CDS archive due to a
1448 // an error. The error will be propagated
1449 void MetaspaceShared::writing_error(const char* message) {
1450 log_error(cds)("An error has occurred while writing the shared archive file.");
1451 if (message != nullptr) {
1452 log_error(cds)("%s", message);
1453 }
1454 }
1455
1456 void MetaspaceShared::initialize_runtime_shared_and_meta_spaces() {
1457 assert(CDSConfig::is_using_archive(), "Must be called when UseSharedSpaces is enabled");
1458 MapArchiveResult result = MAP_ARCHIVE_OTHER_FAILURE;
1459
1460 FileMapInfo* static_mapinfo = FileMapInfo::current_info();
1461 FileMapInfo* dynamic_mapinfo = nullptr;
1462
1463 if (static_mapinfo != nullptr) {
1464 log_info(cds)("Core region alignment: %zu", static_mapinfo->core_region_alignment());
1465 dynamic_mapinfo = open_dynamic_archive();
1466
1467 log_info(cds)("ArchiveRelocationMode: %d", ArchiveRelocationMode);
1468
1469 // First try to map at the requested address
1470 result = map_archives(static_mapinfo, dynamic_mapinfo, true);
1471 if (result == MAP_ARCHIVE_MMAP_FAILURE) {
1472 // Mapping has failed (probably due to ASLR). Let's map at an address chosen
1473 // by the OS.
1474 log_info(cds)("Try to map archive(s) at an alternative address");
1475 result = map_archives(static_mapinfo, dynamic_mapinfo, false);
1476 }
1477 }
1478
1479 if (result == MAP_ARCHIVE_SUCCESS) {
1480 bool dynamic_mapped = (dynamic_mapinfo != nullptr && dynamic_mapinfo->is_mapped());
1481 char* cds_base = static_mapinfo->mapped_base();
1482 char* cds_end = dynamic_mapped ? dynamic_mapinfo->mapped_end() : static_mapinfo->mapped_end();
1483 // Register CDS memory region with LSan.
1484 LSAN_REGISTER_ROOT_REGION(cds_base, cds_end - cds_base);
1485 set_shared_metaspace_range(cds_base, static_mapinfo->mapped_end(), cds_end);
1486 _relocation_delta = static_mapinfo->relocation_delta();
1487 _requested_base_address = static_mapinfo->requested_base_address();
1488 if (dynamic_mapped) {
1489 // turn AutoCreateSharedArchive off if successfully mapped
1490 AutoCreateSharedArchive = false;
1491 }
1492 } else {
1493 set_shared_metaspace_range(nullptr, nullptr, nullptr);
1494 if (CDSConfig::is_dumping_dynamic_archive()) {
1495 log_warning(cds)("-XX:ArchiveClassesAtExit is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info.");
1496 }
1497 UseSharedSpaces = false;
1498 // The base archive cannot be mapped. We cannot dump the dynamic shared archive.
1499 AutoCreateSharedArchive = false;
1500 CDSConfig::disable_dumping_dynamic_archive();
1501 log_info(cds)("Unable to map shared spaces");
1502 if (PrintSharedArchiveAndExit) {
1503 MetaspaceShared::unrecoverable_loading_error("Unable to use shared archive.");
1504 } else if (RequireSharedSpaces) {
1505 MetaspaceShared::unrecoverable_loading_error("Unable to map shared spaces");
1506 } else if (CDSConfig::is_dumping_final_static_archive()) {
1507 assert(CDSPreimage != nullptr, "must be");
1508 log_error(cds)("Unable to map shared spaces for CDSPreimage = %s", CDSPreimage);
1509 MetaspaceShared::unrecoverable_loading_error();
1510 }
1511 }
1512
1513 // If mapping failed and -XShare:on, the vm should exit
1514 bool has_failed = false;
1515 if (static_mapinfo != nullptr && !static_mapinfo->is_mapped()) {
1516 has_failed = true;
1517 delete static_mapinfo;
1518 }
1519 if (dynamic_mapinfo != nullptr && !dynamic_mapinfo->is_mapped()) {
1520 has_failed = true;
1521 delete dynamic_mapinfo;
1522 }
1523 if (RequireSharedSpaces && has_failed) {
1524 // static archive mapped but dynamic archive failed
1525 MetaspaceShared::unrecoverable_loading_error("Unable to map shared spaces");
1526 }
1527 }
1528
1529 // This is called very early at VM start up to get the size of the cached_code region
1530 void MetaspaceShared::open_static_archive() {
1531 if (!UseSharedSpaces) { // FIXME -- is this still needed??
1532 return;
1533 }
1534 const char* static_archive = CDSConfig::input_static_archive_path();
1535 assert(static_archive != nullptr, "sanity");
1536 FileMapInfo* mapinfo = new FileMapInfo(static_archive, true);
1537 if (!mapinfo->open_as_input()) {
1538 delete(mapinfo);
1539 } else {
1540 FileMapRegion* r = mapinfo->region_at(MetaspaceShared::ac);
1541 AOTCacheAccess::set_aot_code_region_size(r->used_aligned());
1542 }
1543 }
1544
1545 FileMapInfo* MetaspaceShared::open_dynamic_archive() {
1546 if (CDSConfig::is_dumping_dynamic_archive()) {
1547 return nullptr;
1548 }
1549 const char* dynamic_archive = CDSConfig::input_dynamic_archive_path();
1550 if (dynamic_archive == nullptr) {
1551 return nullptr;
1552 }
1553
1554 FileMapInfo* mapinfo = new FileMapInfo(dynamic_archive, false);
1555 if (!mapinfo->open_as_input()) {
1556 delete(mapinfo);
1557 if (RequireSharedSpaces) {
1558 MetaspaceShared::unrecoverable_loading_error("Failed to initialize dynamic archive");
1559 }
1560 return nullptr;
1561 }
1562 return mapinfo;
1563 }
1564
1565 // use_requested_addr:
1566 // true = map at FileMapHeader::_requested_base_address
1567 // false = map at an alternative address picked by OS.
1568 MapArchiveResult MetaspaceShared::map_archives(FileMapInfo* static_mapinfo, FileMapInfo* dynamic_mapinfo,
1569 bool use_requested_addr) {
1570 if (use_requested_addr && static_mapinfo->requested_base_address() == nullptr) {
1571 log_info(cds)("Archive(s) were created with -XX:SharedBaseAddress=0. Always map at os-selected address.");
1572 return MAP_ARCHIVE_MMAP_FAILURE;
1573 }
1574
1575 PRODUCT_ONLY(if (ArchiveRelocationMode == 1 && use_requested_addr) {
1576 // For product build only -- this is for benchmarking the cost of doing relocation.
1577 // For debug builds, the check is done below, after reserving the space, for better test coverage
1578 // (see comment below).
1579 log_info(cds)("ArchiveRelocationMode == 1: always map archive(s) at an alternative address");
1580 return MAP_ARCHIVE_MMAP_FAILURE;
1581 });
1582
1583 if (ArchiveRelocationMode == 2 && !use_requested_addr) {
1584 log_info(cds)("ArchiveRelocationMode == 2: never map archive(s) at an alternative address");
1585 return MAP_ARCHIVE_MMAP_FAILURE;
1586 };
1587
1588 if (dynamic_mapinfo != nullptr) {
1589 // Ensure that the OS won't be able to allocate new memory spaces between the two
1590 // archives, or else it would mess up the simple comparison in MetaspaceObj::is_shared().
1591 assert(static_mapinfo->mapping_end_offset() == dynamic_mapinfo->mapping_base_offset(), "no gap");
1592 }
1593
1594 ReservedSpace total_space_rs, archive_space_rs, class_space_rs;
1595 MapArchiveResult result = MAP_ARCHIVE_OTHER_FAILURE;
1596 size_t prot_zone_size = 0;
1597 char* mapped_base_address = reserve_address_space_for_archives(static_mapinfo,
1598 dynamic_mapinfo,
1599 use_requested_addr,
1600 total_space_rs,
1601 archive_space_rs,
1602 class_space_rs);
1603 if (mapped_base_address == nullptr) {
1604 result = MAP_ARCHIVE_MMAP_FAILURE;
1605 log_debug(cds)("Failed to reserve spaces (use_requested_addr=%u)", (unsigned)use_requested_addr);
1606 } else {
1607
1608 if (Metaspace::using_class_space()) {
1609 prot_zone_size = protection_zone_size();
1610 }
1611
1612 #ifdef ASSERT
1613 // Some sanity checks after reserving address spaces for archives
1614 // and class space.
1615 assert(archive_space_rs.is_reserved(), "Sanity");
1616 if (Metaspace::using_class_space()) {
1617 assert(archive_space_rs.base() == mapped_base_address &&
1618 archive_space_rs.size() > protection_zone_size(),
1619 "Archive space must lead and include the protection zone");
1620 // Class space must closely follow the archive space. Both spaces
1621 // must be aligned correctly.
1622 assert(class_space_rs.is_reserved() && class_space_rs.size() > 0,
1623 "A class space should have been reserved");
1624 assert(class_space_rs.base() >= archive_space_rs.end(),
1625 "class space should follow the cds archive space");
1626 assert(is_aligned(archive_space_rs.base(),
1627 core_region_alignment()),
1628 "Archive space misaligned");
1629 assert(is_aligned(class_space_rs.base(),
1630 Metaspace::reserve_alignment()),
1631 "class space misaligned");
1632 }
1633 #endif // ASSERT
1634
1635 log_info(cds)("Reserved archive_space_rs [" INTPTR_FORMAT " - " INTPTR_FORMAT "] (%zu) bytes%s",
1636 p2i(archive_space_rs.base()), p2i(archive_space_rs.end()), archive_space_rs.size(),
1637 (prot_zone_size > 0 ? " (includes protection zone)" : ""));
1638 log_info(cds)("Reserved class_space_rs [" INTPTR_FORMAT " - " INTPTR_FORMAT "] (%zu) bytes",
1639 p2i(class_space_rs.base()), p2i(class_space_rs.end()), class_space_rs.size());
1640
1641 if (MetaspaceShared::use_windows_memory_mapping()) {
1642 // We have now reserved address space for the archives, and will map in
1643 // the archive files into this space.
1644 //
1645 // Special handling for Windows: on Windows we cannot map a file view
1646 // into an existing memory mapping. So, we unmap the address range we
1647 // just reserved again, which will make it available for mapping the
1648 // archives.
1649 // Reserving this range has not been for naught however since it makes
1650 // us reasonably sure the address range is available.
1651 //
1652 // But still it may fail, since between unmapping the range and mapping
1653 // in the archive someone else may grab the address space. Therefore
1654 // there is a fallback in FileMap::map_region() where we just read in
1655 // the archive files sequentially instead of mapping it in. We couple
1656 // this with use_requested_addr, since we're going to patch all the
1657 // pointers anyway so there's no benefit to mmap.
1658 if (use_requested_addr) {
1659 assert(!total_space_rs.is_reserved(), "Should not be reserved for Windows");
1660 log_info(cds)("Windows mmap workaround: releasing archive space.");
1661 MemoryReserver::release(archive_space_rs);
1662 // Mark as not reserved
1663 archive_space_rs = {};
1664 // The protection zone is part of the archive:
1665 // See comment above, the Windows way of loading CDS is to mmap the individual
1666 // parts of the archive into the address region we just vacated. The protection
1667 // zone will not be mapped (and, in fact, does not exist as physical region in
1668 // the archive). Therefore, after removing the archive space above, we must
1669 // re-reserve the protection zone part lest something else gets mapped into that
1670 // area later.
1671 if (prot_zone_size > 0) {
1672 assert(prot_zone_size >= os::vm_allocation_granularity(), "must be"); // not just page size!
1673 char* p = os::attempt_reserve_memory_at(mapped_base_address, prot_zone_size,
1674 mtClassShared);
1675 assert(p == mapped_base_address || p == nullptr, "must be");
1676 if (p == nullptr) {
1677 log_debug(cds)("Failed to re-reserve protection zone");
1678 return MAP_ARCHIVE_MMAP_FAILURE;
1679 }
1680 }
1681 }
1682 }
1683
1684 if (prot_zone_size > 0) {
1685 os::commit_memory(mapped_base_address, prot_zone_size, false); // will later be protected
1686 // Before mapping the core regions into the newly established address space, we mark
1687 // start and the end of the future protection zone with canaries. That way we easily
1688 // catch mapping errors (accidentally mapping data into the future protection zone).
1689 *(mapped_base_address) = 'P';
1690 *(mapped_base_address + prot_zone_size - 1) = 'P';
1691 }
1692
1693 MapArchiveResult static_result = map_archive(static_mapinfo, mapped_base_address, archive_space_rs);
1694 MapArchiveResult dynamic_result = (static_result == MAP_ARCHIVE_SUCCESS) ?
1695 map_archive(dynamic_mapinfo, mapped_base_address, archive_space_rs) : MAP_ARCHIVE_OTHER_FAILURE;
1696
1697 DEBUG_ONLY(if (ArchiveRelocationMode == 1 && use_requested_addr) {
1698 // This is for simulating mmap failures at the requested address. In
1699 // debug builds, we do it here (after all archives have possibly been
1700 // mapped), so we can thoroughly test the code for failure handling
1701 // (releasing all allocated resource, etc).
1702 log_info(cds)("ArchiveRelocationMode == 1: always map archive(s) at an alternative address");
1703 if (static_result == MAP_ARCHIVE_SUCCESS) {
1704 static_result = MAP_ARCHIVE_MMAP_FAILURE;
1705 }
1706 if (dynamic_result == MAP_ARCHIVE_SUCCESS) {
1707 dynamic_result = MAP_ARCHIVE_MMAP_FAILURE;
1708 }
1709 });
1710
1711 if (static_result == MAP_ARCHIVE_SUCCESS) {
1712 if (dynamic_result == MAP_ARCHIVE_SUCCESS) {
1713 result = MAP_ARCHIVE_SUCCESS;
1714 } else if (dynamic_result == MAP_ARCHIVE_OTHER_FAILURE) {
1715 assert(dynamic_mapinfo != nullptr && !dynamic_mapinfo->is_mapped(), "must have failed");
1716 // No need to retry mapping the dynamic archive again, as it will never succeed
1717 // (bad file, etc) -- just keep the base archive.
1718 log_warning(cds, dynamic)("Unable to use shared archive. The top archive failed to load: %s",
1719 dynamic_mapinfo->full_path());
1720 result = MAP_ARCHIVE_SUCCESS;
1721 // TODO, we can give the unused space for the dynamic archive to class_space_rs, but there's no
1722 // easy API to do that right now.
1723 } else {
1724 result = MAP_ARCHIVE_MMAP_FAILURE;
1725 }
1726 } else if (static_result == MAP_ARCHIVE_OTHER_FAILURE) {
1727 result = MAP_ARCHIVE_OTHER_FAILURE;
1728 } else {
1729 result = MAP_ARCHIVE_MMAP_FAILURE;
1730 }
1731 }
1732
1733 if (result == MAP_ARCHIVE_SUCCESS) {
1734 SharedBaseAddress = (size_t)mapped_base_address;
1735 #ifdef _LP64
1736 if (Metaspace::using_class_space()) {
1737 assert(prot_zone_size > 0 &&
1738 *(mapped_base_address) == 'P' &&
1739 *(mapped_base_address + prot_zone_size - 1) == 'P',
1740 "Protection zone was overwritten?");
1741 // Set up ccs in metaspace.
1742 Metaspace::initialize_class_space(class_space_rs);
1743
1744 // Set up compressed Klass pointer encoding: the encoding range must
1745 // cover both archive and class space.
1746 const address encoding_base = (address)mapped_base_address;
1747 const address klass_range_start = encoding_base + prot_zone_size;
1748 const size_t klass_range_size = (address)class_space_rs.end() - klass_range_start;
1749 if (INCLUDE_CDS_JAVA_HEAP || UseCompactObjectHeaders) {
1750 // The CDS archive may contain narrow Klass IDs that were precomputed at archive generation time:
1751 // - every archived java object header (only if INCLUDE_CDS_JAVA_HEAP)
1752 // - every archived Klass' prototype (only if +UseCompactObjectHeaders)
1753 //
1754 // In order for those IDs to still be valid, we need to dictate base and shift: base should be the
1755 // mapping start (including protection zone), shift should be the shift used at archive generation time.
1756 CompressedKlassPointers::initialize_for_given_encoding(
1757 klass_range_start, klass_range_size,
1758 encoding_base, ArchiveBuilder::precomputed_narrow_klass_shift() // precomputed encoding, see ArchiveBuilder
1759 );
1760 } else {
1761 // Let JVM freely choose encoding base and shift
1762 CompressedKlassPointers::initialize(klass_range_start, klass_range_size);
1763 }
1764 CompressedKlassPointers::establish_protection_zone(encoding_base, prot_zone_size);
1765
1766 // map_or_load_heap_region() compares the current narrow oop and klass encodings
1767 // with the archived ones, so it must be done after all encodings are determined.
1768 static_mapinfo->map_or_load_heap_region();
1769 }
1770 #endif // _LP64
1771 log_info(cds)("initial optimized module handling: %s", CDSConfig::is_using_optimized_module_handling() ? "enabled" : "disabled");
1772 log_info(cds)("initial full module graph: %s", CDSConfig::is_using_full_module_graph() ? "enabled" : "disabled");
1773 } else {
1774 unmap_archive(static_mapinfo);
1775 unmap_archive(dynamic_mapinfo);
1776 release_reserved_spaces(total_space_rs, archive_space_rs, class_space_rs);
1777 }
1778
1779 return result;
1780 }
1781
1782
1783 // This will reserve two address spaces suitable to house Klass structures, one
1784 // for the cds archives (static archive and optionally dynamic archive) and
1785 // optionally one move for ccs.
1786 //
1787 // Since both spaces must fall within the compressed class pointer encoding
1788 // range, they are allocated close to each other.
1789 //
1790 // Space for archives will be reserved first, followed by a potential gap,
1791 // followed by the space for ccs:
1792 //
1793 // +-- Base address A B End
1794 // | | | |
1795 // v v v v
1796 // +-------------+--------------+ +----------------------+
1797 // | static arc | [dyn. arch] | [gap] | compr. class space |
1798 // +-------------+--------------+ +----------------------+
1799 //
1800 // (The gap may result from different alignment requirements between metaspace
1801 // and CDS)
1802 //
1803 // If UseCompressedClassPointers is disabled, only one address space will be
1804 // reserved:
1805 //
1806 // +-- Base address End
1807 // | |
1808 // v v
1809 // +-------------+--------------+
1810 // | static arc | [dyn. arch] |
1811 // +-------------+--------------+
1812 //
1813 // Base address: If use_archive_base_addr address is true, the Base address is
1814 // determined by the address stored in the static archive. If
1815 // use_archive_base_addr address is false, this base address is determined
1816 // by the platform.
1817 //
1818 // If UseCompressedClassPointers=1, the range encompassing both spaces will be
1819 // suitable to en/decode narrow Klass pointers: the base will be valid for
1820 // encoding, the range [Base, End) and not surpass the max. range for that encoding.
1821 //
1822 // Return:
1823 //
1824 // - On success:
1825 // - total_space_rs will be reserved as whole for archive_space_rs and
1826 // class_space_rs if UseCompressedClassPointers is true.
1827 // On Windows, try reserve archive_space_rs and class_space_rs
1828 // separately first if use_archive_base_addr is true.
1829 // - archive_space_rs will be reserved and large enough to host static and
1830 // if needed dynamic archive: [Base, A).
1831 // archive_space_rs.base and size will be aligned to CDS reserve
1832 // granularity.
1833 // - class_space_rs: If UseCompressedClassPointers=1, class_space_rs will
1834 // be reserved. Its start address will be aligned to metaspace reserve
1835 // alignment, which may differ from CDS alignment. It will follow the cds
1836 // archive space, close enough such that narrow class pointer encoding
1837 // covers both spaces.
1838 // If UseCompressedClassPointers=0, class_space_rs remains unreserved.
1839 // - On error: null is returned and the spaces remain unreserved.
1840 char* MetaspaceShared::reserve_address_space_for_archives(FileMapInfo* static_mapinfo,
1841 FileMapInfo* dynamic_mapinfo,
1842 bool use_archive_base_addr,
1843 ReservedSpace& total_space_rs,
1844 ReservedSpace& archive_space_rs,
1845 ReservedSpace& class_space_rs) {
1846
1847 address const base_address = (address) (use_archive_base_addr ? static_mapinfo->requested_base_address() : nullptr);
1848 const size_t archive_space_alignment = core_region_alignment();
1849
1850 // Size and requested location of the archive_space_rs (for both static and dynamic archives)
1851 size_t archive_end_offset = (dynamic_mapinfo == nullptr) ? static_mapinfo->mapping_end_offset() : dynamic_mapinfo->mapping_end_offset();
1852 size_t archive_space_size = align_up(archive_end_offset, archive_space_alignment);
1853
1854 if (!Metaspace::using_class_space()) {
1855 // Get the simple case out of the way first:
1856 // no compressed class space, simple allocation.
1857
1858 // When running without class space, requested archive base should be aligned to cds core alignment.
1859 assert(is_aligned(base_address, archive_space_alignment),
1860 "Archive base address unaligned: " PTR_FORMAT ", needs alignment: %zu.",
1861 p2i(base_address), archive_space_alignment);
1862
1863 archive_space_rs = MemoryReserver::reserve((char*)base_address,
1864 archive_space_size,
1865 archive_space_alignment,
1866 os::vm_page_size(),
1867 mtNone);
1868 if (archive_space_rs.is_reserved()) {
1869 assert(base_address == nullptr ||
1870 (address)archive_space_rs.base() == base_address, "Sanity");
1871 // Register archive space with NMT.
1872 MemTracker::record_virtual_memory_tag(archive_space_rs, mtClassShared);
1873 return archive_space_rs.base();
1874 }
1875 return nullptr;
1876 }
1877
1878 #ifdef _LP64
1879
1880 // Complex case: two spaces adjacent to each other, both to be addressable
1881 // with narrow class pointers.
1882 // We reserve the whole range spanning both spaces, then split that range up.
1883
1884 const size_t class_space_alignment = Metaspace::reserve_alignment();
1885
1886 // When running with class space, requested archive base must satisfy both cds core alignment
1887 // and class space alignment.
1888 const size_t base_address_alignment = MAX2(class_space_alignment, archive_space_alignment);
1889 assert(is_aligned(base_address, base_address_alignment),
1890 "Archive base address unaligned: " PTR_FORMAT ", needs alignment: %zu.",
1891 p2i(base_address), base_address_alignment);
1892
1893 size_t class_space_size = CompressedClassSpaceSize;
1894 assert(CompressedClassSpaceSize > 0 &&
1895 is_aligned(CompressedClassSpaceSize, class_space_alignment),
1896 "CompressedClassSpaceSize malformed: %zu", CompressedClassSpaceSize);
1897
1898 const size_t ccs_begin_offset = align_up(archive_space_size, class_space_alignment);
1899 const size_t gap_size = ccs_begin_offset - archive_space_size;
1900
1901 // Reduce class space size if it would not fit into the Klass encoding range
1902 constexpr size_t max_encoding_range_size = 4 * G;
1903 guarantee(archive_space_size < max_encoding_range_size - class_space_alignment, "Archive too large");
1904 if ((archive_space_size + gap_size + class_space_size) > max_encoding_range_size) {
1905 class_space_size = align_down(max_encoding_range_size - archive_space_size - gap_size, class_space_alignment);
1906 log_info(metaspace)("CDS initialization: reducing class space size from %zu to %zu",
1907 CompressedClassSpaceSize, class_space_size);
1908 FLAG_SET_ERGO(CompressedClassSpaceSize, class_space_size);
1909 }
1910
1911 const size_t total_range_size =
1912 archive_space_size + gap_size + class_space_size;
1913
1914 // Test that class space base address plus shift can be decoded by aarch64, when restored.
1915 const int precomputed_narrow_klass_shift = ArchiveBuilder::precomputed_narrow_klass_shift();
1916 if (!CompressedKlassPointers::check_klass_decode_mode(base_address, precomputed_narrow_klass_shift,
1917 total_range_size)) {
1918 log_info(cds)("CDS initialization: Cannot use SharedBaseAddress " PTR_FORMAT " with precomputed shift %d.",
1919 p2i(base_address), precomputed_narrow_klass_shift);
1920 use_archive_base_addr = false;
1921 }
1922
1923 assert(total_range_size > ccs_begin_offset, "must be");
1924 if (use_windows_memory_mapping() && use_archive_base_addr) {
1925 if (base_address != nullptr) {
1926 // On Windows, we cannot safely split a reserved memory space into two (see JDK-8255917).
1927 // Hence, we optimistically reserve archive space and class space side-by-side. We only
1928 // do this for use_archive_base_addr=true since for use_archive_base_addr=false case
1929 // caller will not split the combined space for mapping, instead read the archive data
1930 // via sequential file IO.
1931 address ccs_base = base_address + archive_space_size + gap_size;
1932 archive_space_rs = MemoryReserver::reserve((char*)base_address,
1933 archive_space_size,
1934 archive_space_alignment,
1935 os::vm_page_size(),
1936 mtNone);
1937 class_space_rs = MemoryReserver::reserve((char*)ccs_base,
1938 class_space_size,
1939 class_space_alignment,
1940 os::vm_page_size(),
1941 mtNone);
1942 }
1943 if (!archive_space_rs.is_reserved() || !class_space_rs.is_reserved()) {
1944 release_reserved_spaces(total_space_rs, archive_space_rs, class_space_rs);
1945 return nullptr;
1946 }
1947 MemTracker::record_virtual_memory_tag(archive_space_rs, mtClassShared);
1948 MemTracker::record_virtual_memory_tag(class_space_rs, mtClass);
1949 } else {
1950 if (use_archive_base_addr && base_address != nullptr) {
1951 total_space_rs = MemoryReserver::reserve((char*) base_address,
1952 total_range_size,
1953 base_address_alignment,
1954 os::vm_page_size(),
1955 mtNone);
1956 } else {
1957 // We did not manage to reserve at the preferred address, or were instructed to relocate. In that
1958 // case we reserve wherever possible, but the start address needs to be encodable as narrow Klass
1959 // encoding base since the archived heap objects contain narrow Klass IDs pre-calculated toward the start
1960 // of the shared Metaspace. That prevents us from using zero-based encoding and therefore we won't
1961 // try allocating in low-address regions.
1962 total_space_rs = Metaspace::reserve_address_space_for_compressed_classes(total_range_size, false /* optimize_for_zero_base */);
1963 }
1964
1965 if (!total_space_rs.is_reserved()) {
1966 return nullptr;
1967 }
1968
1969 // Paranoid checks:
1970 assert(!use_archive_base_addr || (address)total_space_rs.base() == base_address,
1971 "Sanity (" PTR_FORMAT " vs " PTR_FORMAT ")", p2i(base_address), p2i(total_space_rs.base()));
1972 assert(is_aligned(total_space_rs.base(), base_address_alignment), "Sanity");
1973 assert(total_space_rs.size() == total_range_size, "Sanity");
1974
1975 // Now split up the space into ccs and cds archive. For simplicity, just leave
1976 // the gap reserved at the end of the archive space. Do not do real splitting.
1977 archive_space_rs = total_space_rs.first_part(ccs_begin_offset,
1978 (size_t)archive_space_alignment);
1979 class_space_rs = total_space_rs.last_part(ccs_begin_offset);
1980 MemTracker::record_virtual_memory_split_reserved(total_space_rs.base(), total_space_rs.size(),
1981 ccs_begin_offset, mtClassShared, mtClass);
1982 }
1983 assert(is_aligned(archive_space_rs.base(), archive_space_alignment), "Sanity");
1984 assert(is_aligned(archive_space_rs.size(), archive_space_alignment), "Sanity");
1985 assert(is_aligned(class_space_rs.base(), class_space_alignment), "Sanity");
1986 assert(is_aligned(class_space_rs.size(), class_space_alignment), "Sanity");
1987
1988
1989 return archive_space_rs.base();
1990
1991 #else
1992 ShouldNotReachHere();
1993 return nullptr;
1994 #endif
1995
1996 }
1997
1998 void MetaspaceShared::release_reserved_spaces(ReservedSpace& total_space_rs,
1999 ReservedSpace& archive_space_rs,
2000 ReservedSpace& class_space_rs) {
2001 if (total_space_rs.is_reserved()) {
2002 log_debug(cds)("Released shared space (archive + class) " INTPTR_FORMAT, p2i(total_space_rs.base()));
2003 MemoryReserver::release(total_space_rs);
2004 total_space_rs = {};
2005 } else {
2006 if (archive_space_rs.is_reserved()) {
2007 log_debug(cds)("Released shared space (archive) " INTPTR_FORMAT, p2i(archive_space_rs.base()));
2008 MemoryReserver::release(archive_space_rs);
2009 archive_space_rs = {};
2010 }
2011 if (class_space_rs.is_reserved()) {
2012 log_debug(cds)("Released shared space (classes) " INTPTR_FORMAT, p2i(class_space_rs.base()));
2013 MemoryReserver::release(class_space_rs);
2014 class_space_rs = {};
2015 }
2016 }
2017 }
2018
2019 static int archive_regions[] = { MetaspaceShared::rw, MetaspaceShared::ro };
2020 static int archive_regions_count = 2;
2021
2022 MapArchiveResult MetaspaceShared::map_archive(FileMapInfo* mapinfo, char* mapped_base_address, ReservedSpace rs) {
2023 assert(CDSConfig::is_using_archive(), "must be runtime");
2024 if (mapinfo == nullptr) {
2025 return MAP_ARCHIVE_SUCCESS; // The dynamic archive has not been specified. No error has happened -- trivially succeeded.
2026 }
2027
2028 if (!mapinfo->validate_aot_class_linking()) {
2029 return MAP_ARCHIVE_OTHER_FAILURE;
2030 }
2031
2032 mapinfo->set_is_mapped(false);
2033 if (mapinfo->core_region_alignment() != (size_t)core_region_alignment()) {
2034 log_info(cds)("Unable to map CDS archive -- core_region_alignment() expected: %zu"
2035 " actual: %zu", mapinfo->core_region_alignment(), core_region_alignment());
2036 return MAP_ARCHIVE_OTHER_FAILURE;
2037 }
2038
2039 MapArchiveResult result =
2040 mapinfo->map_regions(archive_regions, archive_regions_count, mapped_base_address, rs);
2041
2042 if (result != MAP_ARCHIVE_SUCCESS) {
2043 unmap_archive(mapinfo);
2044 return result;
2045 }
2046
2047 if (!mapinfo->validate_class_location()) {
2048 unmap_archive(mapinfo);
2049 return MAP_ARCHIVE_OTHER_FAILURE;
2050 }
2051
2052 if (mapinfo->is_static()) {
2053 // Currently, only static archive uses early serialized data.
2054 char* buffer = mapinfo->early_serialized_data();
2055 intptr_t* array = (intptr_t*)buffer;
2056 ReadClosure rc(&array, (intptr_t)mapped_base_address);
2057 early_serialize(&rc);
2058 }
2059
2060 if (!mapinfo->validate_aot_class_linking()) {
2061 unmap_archive(mapinfo);
2062 return MAP_ARCHIVE_OTHER_FAILURE;
2063 }
2064
2065 mapinfo->set_is_mapped(true);
2066 return MAP_ARCHIVE_SUCCESS;
2067 }
2068
2069 void MetaspaceShared::unmap_archive(FileMapInfo* mapinfo) {
2070 assert(CDSConfig::is_using_archive(), "must be runtime");
2071 if (mapinfo != nullptr) {
2072 mapinfo->unmap_regions(archive_regions, archive_regions_count);
2073 mapinfo->unmap_region(MetaspaceShared::bm);
2074 mapinfo->set_is_mapped(false);
2075 }
2076 }
2077
2078 // For -XX:PrintSharedArchiveAndExit
2079 class CountSharedSymbols : public SymbolClosure {
2080 private:
2081 int _count;
2082 public:
2083 CountSharedSymbols() : _count(0) {}
2084 void do_symbol(Symbol** sym) {
2085 _count++;
2086 }
2087 int total() { return _count; }
2088
2089 };
2090
2091 // Read the miscellaneous data from the shared file, and
2092 // serialize it out to its various destinations.
2093
2094 void MetaspaceShared::initialize_shared_spaces() {
2095 FileMapInfo *static_mapinfo = FileMapInfo::current_info();
2096
2097 // Verify various attributes of the archive, plus initialize the
2098 // shared string/symbol tables.
2099 char* buffer = static_mapinfo->serialized_data();
2100 intptr_t* array = (intptr_t*)buffer;
2101 ReadClosure rc(&array, (intptr_t)SharedBaseAddress);
2102 serialize(&rc);
2103
2104 // Finish up archived heap initialization. These must be
2105 // done after ReadClosure.
2106 static_mapinfo->patch_heap_embedded_pointers();
2107 ArchiveHeapLoader::finish_initialization();
2108 Universe::load_archived_object_instances();
2109 AOTCodeCache::initialize();
2110
2111 // Close the mapinfo file
2112 static_mapinfo->close();
2113
2114 static_mapinfo->unmap_region(MetaspaceShared::bm);
2115
2116 FileMapInfo *dynamic_mapinfo = FileMapInfo::dynamic_info();
2117 if (dynamic_mapinfo != nullptr) {
2118 intptr_t* buffer = (intptr_t*)dynamic_mapinfo->serialized_data();
2119 ReadClosure rc(&buffer, (intptr_t)SharedBaseAddress);
2120 ArchiveBuilder::serialize_dynamic_archivable_items(&rc);
2121 DynamicArchive::setup_array_klasses();
2122 dynamic_mapinfo->close();
2123 dynamic_mapinfo->unmap_region(MetaspaceShared::bm);
2124 }
2125
2126 LogStreamHandle(Info, cds) lsh;
2127 if (lsh.is_enabled()) {
2128 lsh.print("Using AOT-linked classes: %s (static archive: %s aot-linked classes",
2129 BOOL_TO_STR(CDSConfig::is_using_aot_linked_classes()),
2130 static_mapinfo->header()->has_aot_linked_classes() ? "has" : "no");
2131 if (dynamic_mapinfo != nullptr) {
2132 lsh.print(", dynamic archive: %s aot-linked classes",
2133 dynamic_mapinfo->header()->has_aot_linked_classes() ? "has" : "no");
2134 }
2135 lsh.print_cr(")");
2136 }
2137
2138 // Set up LambdaFormInvokers::_lambdaform_lines for dynamic dump
2139 if (CDSConfig::is_dumping_dynamic_archive()) {
2140 // Read stored LF format lines stored in static archive
2141 LambdaFormInvokers::read_static_archive_invokers();
2142 }
2143
2144 if (PrintSharedArchiveAndExit) {
2145 // Print archive names
2146 if (dynamic_mapinfo != nullptr) {
2147 tty->print_cr("\n\nBase archive name: %s", CDSConfig::input_static_archive_path());
2148 tty->print_cr("Base archive version %d", static_mapinfo->version());
2149 } else {
2150 tty->print_cr("Static archive name: %s", static_mapinfo->full_path());
2151 tty->print_cr("Static archive version %d", static_mapinfo->version());
2152 }
2153
2154 SystemDictionaryShared::print_shared_archive(tty);
2155 if (dynamic_mapinfo != nullptr) {
2156 tty->print_cr("\n\nDynamic archive name: %s", dynamic_mapinfo->full_path());
2157 tty->print_cr("Dynamic archive version %d", dynamic_mapinfo->version());
2158 SystemDictionaryShared::print_shared_archive(tty, false/*dynamic*/);
2159 }
2160 TrainingData::print_archived_training_data_on(tty);
2161
2162 if (AOTCodeCache::is_on_for_use()) {
2163 tty->print_cr("\n\nAOT Code");
2164 AOTCodeCache::print_on(tty);
2165 }
2166
2167 // collect shared symbols and strings
2168 CountSharedSymbols cl;
2169 SymbolTable::shared_symbols_do(&cl);
2170 tty->print_cr("Number of shared symbols: %d", cl.total());
2171 tty->print_cr("Number of shared strings: %zu", StringTable::shared_entry_count());
2172 tty->print_cr("VM version: %s\r\n", static_mapinfo->vm_version());
2173 if (FileMapInfo::current_info() == nullptr || _archive_loading_failed) {
2174 tty->print_cr("archive is invalid");
2175 vm_exit(1);
2176 } else {
2177 tty->print_cr("archive is valid");
2178 vm_exit(0);
2179 }
2180 }
2181 }
2182
2183 // JVM/TI RedefineClasses() support:
2184 bool MetaspaceShared::remap_shared_readonly_as_readwrite() {
2185 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
2186
2187 if (CDSConfig::is_using_archive()) {
2188 // remap the shared readonly space to shared readwrite, private
2189 FileMapInfo* mapinfo = FileMapInfo::current_info();
2190 if (!mapinfo->remap_shared_readonly_as_readwrite()) {
2191 return false;
2192 }
2193 if (FileMapInfo::dynamic_info() != nullptr) {
2194 mapinfo = FileMapInfo::dynamic_info();
2195 if (!mapinfo->remap_shared_readonly_as_readwrite()) {
2196 return false;
2197 }
2198 }
2199 _remapped_readwrite = true;
2200 }
2201 return true;
2202 }
2203
2204 void MetaspaceShared::print_on(outputStream* st) {
2205 if (CDSConfig::is_using_archive()) {
2206 st->print("CDS archive(s) mapped at: ");
2207 address base = (address)MetaspaceObj::shared_metaspace_base();
2208 address static_top = (address)_shared_metaspace_static_top;
2209 address top = (address)MetaspaceObj::shared_metaspace_top();
2210 st->print("[" PTR_FORMAT "-" PTR_FORMAT "-" PTR_FORMAT "), ", p2i(base), p2i(static_top), p2i(top));
2211 st->print("size %zu, ", top - base);
2212 st->print("SharedBaseAddress: " PTR_FORMAT ", ArchiveRelocationMode: %d.", SharedBaseAddress, ArchiveRelocationMode);
2213 } else {
2214 st->print("CDS archive(s) not mapped");
2215 }
2216 st->cr();
2217 }