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/aotClassInitializer.hpp"
26 #include "cds/aotArtifactFinder.hpp"
27 #include "cds/aotClassInitializer.hpp"
28 #include "cds/aotClassLinker.hpp"
29 #include "cds/aotClassLocation.hpp"
30 #include "cds/aotConstantPoolResolver.hpp"
31 #include "cds/aotLinkedClassBulkLoader.hpp"
32 #include "cds/archiveBuilder.hpp"
33 #include "cds/archiveHeapLoader.hpp"
34 #include "cds/archiveHeapWriter.hpp"
35 #include "cds/cds_globals.hpp"
36 #include "cds/cdsAccess.hpp"
37 #include "cds/cdsConfig.hpp"
38 #include "cds/cdsProtectionDomain.hpp"
39 #include "cds/classListParser.hpp"
40 #include "cds/classListWriter.hpp"
41 #include "cds/cppVtables.hpp"
42 #include "cds/dumpAllocStats.hpp"
43 #include "cds/dynamicArchive.hpp"
44 #include "cds/filemap.hpp"
45 #include "cds/finalImageRecipes.hpp"
46 #include "cds/heapShared.hpp"
47 #include "cds/lambdaFormInvokers.hpp"
48 #include "cds/lambdaProxyClassDictionary.hpp"
49 #include "cds/metaspaceShared.hpp"
50 #include "classfile/classLoaderDataGraph.hpp"
51 #include "classfile/classLoaderDataShared.hpp"
52 #include "classfile/classLoaderExt.hpp"
53 #include "classfile/javaClasses.inline.hpp"
54 #include "classfile/loaderConstraints.hpp"
55 #include "classfile/modules.hpp"
56 #include "classfile/placeholders.hpp"
57 #include "classfile/stringTable.hpp"
58 #include "classfile/symbolTable.hpp"
59 #include "classfile/systemDictionary.hpp"
60 #include "classfile/systemDictionaryShared.hpp"
61 #include "classfile/vmClasses.hpp"
62 #include "classfile/vmSymbols.hpp"
63 #include "code/codeCache.hpp"
64 #include "code/SCCache.hpp"
65 #include "compiler/compileBroker.hpp"
66 #include "compiler/precompiler.hpp"
67 #include "gc/shared/gcVMOperations.hpp"
68 #include "interpreter/bytecodeStream.hpp"
69 #include "interpreter/bytecodes.hpp"
70 #include "jvm_io.h"
71 #include "logging/log.hpp"
72 #include "logging/logMessage.hpp"
73 #include "logging/logStream.hpp"
74 #include "memory/memoryReserver.hpp"
75 #include "memory/metaspace.hpp"
76 #include "memory/metaspaceClosure.hpp"
77 #include "memory/oopFactory.hpp"
78 #include "memory/resourceArea.hpp"
79 #include "memory/universe.hpp"
80 #include "nmt/memTracker.hpp"
81 #include "oops/compressedKlass.hpp"
82 #include "oops/instanceMirrorKlass.hpp"
83 #include "oops/klass.inline.hpp"
84 #include "oops/method.inline.hpp"
85 #include "oops/objArrayOop.hpp"
86 #include "oops/oop.inline.hpp"
87 #include "oops/oopHandle.hpp"
88 #include "oops/trainingData.hpp"
89 #include "prims/jvmtiExport.hpp"
90 #include "prims/whitebox.hpp"
91 #include "runtime/arguments.hpp"
92 #include "runtime/globals.hpp"
93 #include "runtime/globals_extension.hpp"
94 #include "runtime/handles.inline.hpp"
95 #include "runtime/javaCalls.hpp"
96 #include "runtime/os.inline.hpp"
97 #include "runtime/safepointVerifiers.hpp"
98 #include "runtime/sharedRuntime.hpp"
99 #include "runtime/vmOperations.hpp"
100 #include "runtime/vmThread.hpp"
101 #include "sanitizers/leak.hpp"
102 #include "utilities/align.hpp"
103 #include "utilities/bitMap.inline.hpp"
104 #include "utilities/defaultStream.hpp"
105 #include "utilities/macros.hpp"
106 #include "utilities/ostream.hpp"
107 #include "utilities/resourceHash.hpp"
108
109 #include <sys/stat.h>
110
111 ReservedSpace MetaspaceShared::_symbol_rs;
112 VirtualSpace MetaspaceShared::_symbol_vs;
113 bool MetaspaceShared::_archive_loading_failed = false;
114 bool MetaspaceShared::_remapped_readwrite = false;
115 void* MetaspaceShared::_shared_metaspace_static_top = nullptr;
116 intx MetaspaceShared::_relocation_delta;
117 char* MetaspaceShared::_requested_base_address;
118 Array<Method*>* MetaspaceShared::_archived_method_handle_intrinsics = nullptr;
119 bool MetaspaceShared::_use_optimized_module_handling = true;
120 int volatile MetaspaceShared::_preimage_static_archive_dumped = 0;
121
122 // The CDS archive is divided into the following regions:
123 // rw - read-write metadata
124 // ro - read-only metadata and read-only tables
125 // hp - heap region
126 // bm - bitmap for relocating the above 7 regions.
127 //
128 // The rw and ro regions are linearly allocated, in the order of rw->ro.
129 // These regions are aligned with MetaspaceShared::core_region_alignment().
130 //
131 // These 2 regions are populated in the following steps:
132 // [0] All classes are loaded in MetaspaceShared::preload_classes(). All metadata are
133 // temporarily allocated outside of the shared regions.
134 // [1] We enter a safepoint and allocate a buffer for the rw/ro regions.
135 // [2] C++ vtables are copied into the rw region.
136 // [3] ArchiveBuilder copies RW metadata into the rw region.
137 // [4] ArchiveBuilder copies RO metadata into the ro region.
138 // [5] SymbolTable, StringTable, SystemDictionary, and a few other read-only data
139 // are copied into the ro region as read-only tables.
140 //
141 // The heap region is written by HeapShared::write_heap().
142 //
143 // The bitmap region is used to relocate the ro/rw/hp regions.
144
145 static DumpRegion _symbol_region("symbols");
146
147 char* MetaspaceShared::symbol_space_alloc(size_t num_bytes) {
148 return _symbol_region.allocate(num_bytes);
149 }
150
151 // os::vm_allocation_granularity() is usually 4K for most OSes. However, some platforms
152 // such as linux-aarch64 and macos-x64 ...
153 // it can be either 4K or 64K and on macos-aarch64 it is 16K. To generate archives that are
154 // compatible for both settings, an alternative cds core region alignment can be enabled
155 // at building time:
156 // --enable-compactible-cds-alignment
157 // Upon successful configuration, the compactible alignment then can be defined in:
158 // os_linux_aarch64.cpp
159 // os_bsd_x86.cpp
160 size_t MetaspaceShared::core_region_alignment() {
161 return os::cds_core_region_alignment();
162 }
163
164 size_t MetaspaceShared::protection_zone_size() {
165 return os::cds_core_region_alignment();
166 }
167
168 static bool shared_base_valid(char* shared_base) {
169 // We check user input for SharedBaseAddress at dump time.
170
171 // At CDS runtime, "shared_base" will be the (attempted) mapping start. It will also
172 // be the encoding base, since the headers of archived base objects (and with Lilliput,
173 // the prototype mark words) carry pre-computed narrow Klass IDs that refer to the mapping
174 // start as base.
175 //
176 // On AARCH64, The "shared_base" may not be later usable as encoding base, depending on the
177 // total size of the reserved area and the precomputed_narrow_klass_shift. This is checked
178 // before reserving memory. Here we weed out values already known to be invalid later.
179 return AARCH64_ONLY(is_aligned(shared_base, 4 * G)) NOT_AARCH64(true);
180 }
181
182 class DumpClassListCLDClosure : public CLDClosure {
183 static const int INITIAL_TABLE_SIZE = 1987;
184 static const int MAX_TABLE_SIZE = 61333;
185
186 fileStream *_stream;
187 ResizeableResourceHashtable<InstanceKlass*, bool,
188 AnyObj::C_HEAP, mtClassShared> _dumped_classes;
189
190 void dump(InstanceKlass* ik) {
191 bool created;
192 _dumped_classes.put_if_absent(ik, &created);
193 if (!created) {
194 return;
195 }
196 if (_dumped_classes.maybe_grow()) {
197 log_info(cds, hashtables)("Expanded _dumped_classes table to %d", _dumped_classes.table_size());
198 }
199 if (ik->java_super()) {
200 dump(ik->java_super());
201 }
202 Array<InstanceKlass*>* interfaces = ik->local_interfaces();
203 int len = interfaces->length();
204 for (int i = 0; i < len; i++) {
205 dump(interfaces->at(i));
206 }
207 ClassListWriter::write_to_stream(ik, _stream);
208 }
209
210 public:
211 DumpClassListCLDClosure(fileStream* f)
212 : CLDClosure(), _dumped_classes(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE) {
213 _stream = f;
214 }
215
216 void do_cld(ClassLoaderData* cld) {
217 for (Klass* klass = cld->klasses(); klass != nullptr; klass = klass->next_link()) {
218 if (klass->is_instance_klass()) {
219 dump(InstanceKlass::cast(klass));
220 }
221 }
222 }
223 };
224
225 void MetaspaceShared::dump_loaded_classes(const char* file_name, TRAPS) {
226 fileStream stream(file_name, "w");
227 if (stream.is_open()) {
228 MutexLocker lock(ClassLoaderDataGraph_lock);
229 MutexLocker lock2(ClassListFile_lock, Mutex::_no_safepoint_check_flag);
230 DumpClassListCLDClosure collect_classes(&stream);
231 ClassLoaderDataGraph::loaded_cld_do(&collect_classes);
232 } else {
233 THROW_MSG(vmSymbols::java_io_IOException(), "Failed to open file");
234 }
235 }
236
237 static bool shared_base_too_high(char* specified_base, char* aligned_base, size_t cds_max) {
238 // Caller should have checked that aligned_base was successfully aligned and is not nullptr.
239 // Comparing specified_base with nullptr is UB.
240 assert(aligned_base != nullptr, "sanity");
241 assert(aligned_base >= specified_base, "sanity");
242
243 if (max_uintx - uintx(aligned_base) < uintx(cds_max)) {
244 // Not enough address space to hold an archive of cds_max bytes from aligned_base.
245 return true;
246 } else {
247 return false;
248 }
249 }
250
251 static char* compute_shared_base(size_t cds_max) {
252 char* specified_base = (char*)SharedBaseAddress;
253 size_t alignment = MetaspaceShared::core_region_alignment();
254 if (UseCompressedClassPointers) {
255 alignment = MAX2(alignment, Metaspace::reserve_alignment());
256 }
257
258 if (SharedBaseAddress == 0) {
259 // Special meaning of -XX:SharedBaseAddress=0 -> Always map archive at os-selected address.
260 return specified_base;
261 }
262
263 char* aligned_base = can_align_up(specified_base, alignment)
264 ? align_up(specified_base, alignment)
265 : nullptr;
266
267 if (aligned_base != specified_base) {
268 log_info(cds)("SharedBaseAddress (" INTPTR_FORMAT ") aligned up to " INTPTR_FORMAT,
269 p2i(specified_base), p2i(aligned_base));
270 }
271
272 const char* err = nullptr;
273 if (aligned_base == nullptr) {
274 err = "too high";
275 } else if (shared_base_too_high(specified_base, aligned_base, cds_max)) {
276 err = "too high";
277 } else if (!shared_base_valid(aligned_base)) {
278 err = "invalid for this platform";
279 } else {
280 return aligned_base;
281 }
282
283 // Arguments::default_SharedBaseAddress() is hard-coded in cds_globals.hpp. It must be carefully
284 // picked that (a) the align_up() below will always return a valid value; (b) none of
285 // the following asserts will fail.
286 log_warning(cds)("SharedBaseAddress (" INTPTR_FORMAT ") is %s. Reverted to " INTPTR_FORMAT,
287 p2i((void*)SharedBaseAddress), err,
288 p2i((void*)Arguments::default_SharedBaseAddress()));
289
290 specified_base = (char*)Arguments::default_SharedBaseAddress();
291 aligned_base = align_up(specified_base, alignment);
292
293 // Make sure the default value of SharedBaseAddress specified in globals.hpp is sane.
294 assert(!shared_base_too_high(specified_base, aligned_base, cds_max), "Sanity");
295 assert(shared_base_valid(aligned_base), "Sanity");
296 return aligned_base;
297 }
298
299 void MetaspaceShared::initialize_for_static_dump() {
300 assert(CDSConfig::is_dumping_static_archive(), "sanity");
301
302 if (CDSConfig::is_dumping_preimage_static_archive() || CDSConfig::is_dumping_final_static_archive()) {
303 if (!((UseG1GC || UseParallelGC || UseSerialGC || UseEpsilonGC || UseShenandoahGC) && UseCompressedClassPointers)) {
304 const char* error;
305 if (CDSConfig::is_experimental_leyden_workflow()) {
306 error = "Cannot create the CacheDataStore";
307 } else if (CDSConfig::is_dumping_preimage_static_archive()) {
308 error = "Cannot create the AOT configuration file";
309 } else {
310 error = "Cannot create the AOT cache";
311 }
312
313 vm_exit_during_initialization(error,
314 "UseCompressedClassPointers must be enabled, and collector must be G1, Parallel, Serial, Epsilon, or Shenandoah");
315 }
316 }
317
318 log_info(cds)("Core region alignment: %zu", core_region_alignment());
319 // The max allowed size for CDS archive. We use this to limit SharedBaseAddress
320 // to avoid address space wrap around.
321 size_t cds_max;
322 const size_t reserve_alignment = core_region_alignment();
323
324 #ifdef _LP64
325 const uint64_t UnscaledClassSpaceMax = (uint64_t(max_juint) + 1);
326 cds_max = align_down(UnscaledClassSpaceMax, reserve_alignment);
327 #else
328 // We don't support archives larger than 256MB on 32-bit due to limited
329 // virtual address space.
330 cds_max = align_down(256*M, reserve_alignment);
331 #endif
332
333 _requested_base_address = compute_shared_base(cds_max);
334 SharedBaseAddress = (size_t)_requested_base_address;
335
336 size_t symbol_rs_size = LP64_ONLY(3 * G) NOT_LP64(128 * M);
337 _symbol_rs = MemoryReserver::reserve(symbol_rs_size,
338 os::vm_allocation_granularity(),
339 os::vm_page_size(),
340 mtClassShared);
341 if (!_symbol_rs.is_reserved()) {
342 log_error(cds)("Unable to reserve memory for symbols: %zu bytes.", symbol_rs_size);
343 MetaspaceShared::unrecoverable_writing_error();
344 }
345 _symbol_region.init(&_symbol_rs, &_symbol_vs);
346 }
347
348 // Called by universe_post_init()
349 void MetaspaceShared::post_initialize(TRAPS) {
350 if (CDSConfig::is_using_archive()) {
351 int size = AOTClassLocationConfig::runtime()->length();
352 if (size > 0) {
353 CDSProtectionDomain::allocate_shared_data_arrays(size, CHECK);
354 }
355 }
356 }
357
358 // Extra java.lang.Strings to be added to the archive
359 static GrowableArrayCHeap<OopHandle, mtClassShared>* _extra_interned_strings = nullptr;
360 // Extra Symbols to be added to the archive
361 static GrowableArrayCHeap<Symbol*, mtClassShared>* _extra_symbols = nullptr;
362 // Methods managed by SystemDictionary::find_method_handle_intrinsic() to be added to the archive
363 static GrowableArray<Method*>* _pending_method_handle_intrinsics = nullptr;
364
365 void MetaspaceShared::read_extra_data(JavaThread* current, const char* filename) {
366 _extra_interned_strings = new GrowableArrayCHeap<OopHandle, mtClassShared>(10000);
367 _extra_symbols = new GrowableArrayCHeap<Symbol*, mtClassShared>(1000);
368
369 HashtableTextDump reader(filename);
370 reader.check_version("VERSION: 1.0");
371
372 while (reader.remain() > 0) {
373 int utf8_length;
374 int prefix_type = reader.scan_prefix(&utf8_length);
375 ResourceMark rm(current);
376 if (utf8_length == 0x7fffffff) {
377 // buf_len will overflown 32-bit value.
378 log_error(cds)("string length too large: %d", utf8_length);
379 MetaspaceShared::unrecoverable_loading_error();
380 }
381 int buf_len = utf8_length+1;
382 char* utf8_buffer = NEW_RESOURCE_ARRAY(char, buf_len);
383 reader.get_utf8(utf8_buffer, utf8_length);
384 utf8_buffer[utf8_length] = '\0';
385
386 if (prefix_type == HashtableTextDump::SymbolPrefix) {
387 _extra_symbols->append(SymbolTable::new_permanent_symbol(utf8_buffer));
388 } else{
389 assert(prefix_type == HashtableTextDump::StringPrefix, "Sanity");
390 ExceptionMark em(current);
391 JavaThread* THREAD = current; // For exception macros.
392 oop str = StringTable::intern(utf8_buffer, THREAD);
393
394 if (HAS_PENDING_EXCEPTION) {
395 log_warning(cds, heap)("[line %d] extra interned string allocation failed; size too large: %d",
396 reader.last_line_no(), utf8_length);
397 CLEAR_PENDING_EXCEPTION;
398 } else {
399 #if INCLUDE_CDS_JAVA_HEAP
400 if (ArchiveHeapWriter::is_string_too_large_to_archive(str)) {
401 log_warning(cds, heap)("[line %d] extra interned string ignored; size too large: %d",
402 reader.last_line_no(), utf8_length);
403 continue;
404 }
405 // Make sure this string is included in the dumped interned string table.
406 assert(str != nullptr, "must succeed");
407 _extra_interned_strings->append(OopHandle(Universe::vm_global(), str));
408 #endif
409 }
410 }
411 }
412 }
413
414 void MetaspaceShared::make_method_handle_intrinsics_shareable() {
415 for (int i = 0; i < _pending_method_handle_intrinsics->length(); i++) {
416 Method* m = ArchiveBuilder::current()->get_buffered_addr(_pending_method_handle_intrinsics->at(i));
417 m->remove_unshareable_info();
418 // Each method has its own constant pool (which is distinct from m->method_holder()->constants());
419 m->constants()->remove_unshareable_info();
420 }
421 }
422
423 void MetaspaceShared::write_method_handle_intrinsics() {
424 int len = _pending_method_handle_intrinsics->length();
425 _archived_method_handle_intrinsics = ArchiveBuilder::new_ro_array<Method*>(len);
426 int word_size = _archived_method_handle_intrinsics->size();
427 for (int i = 0; i < len; i++) {
428 Method* m = _pending_method_handle_intrinsics->at(i);
429 ArchiveBuilder::current()->write_pointer_in_buffer(_archived_method_handle_intrinsics->adr_at(i), m);
430 word_size += m->size() + m->constMethod()->size() + m->constants()->size();
431 if (m->constants()->cache() != nullptr) {
432 word_size += m->constants()->cache()->size();
433 }
434 }
435 log_info(cds)("Archived %d method handle intrinsics (%d bytes)", len, word_size * BytesPerWord);
436 }
437
438 // About "serialize" --
439 //
440 // This is (probably a badly named) way to read/write a data stream of pointers and
441 // miscellaneous data from/to the shared archive file. The usual code looks like this:
442 //
443 // // These two global C++ variables are initialized during dump time.
444 // static int _archived_int;
445 // static MetaspaceObj* archived_ptr;
446 //
447 // void MyClass::serialize(SerializeClosure* soc) {
448 // soc->do_int(&_archived_int);
449 // soc->do_int(&_archived_ptr);
450 // }
451 //
452 // At dumptime, these two variables are stored into the CDS archive.
453 // At runtime, these two variables are loaded from the CDS archive.
454 // In addition, the pointer is relocated as necessary.
455 //
456 // Some of the xxx::serialize() functions may have side effects and assume that
457 // the archive is already mapped. For example, SymbolTable::serialize_shared_table_header()
458 // unconditionally makes the set of archived symbols available. Therefore, we put most
459 // of these xxx::serialize() functions inside MetaspaceShared::serialize(), which
460 // is called AFTER we made the decision to map the archive.
461 //
462 // However, some of the "serialized" data are used to decide whether an archive should
463 // be mapped or not (e.g., for checking if the -Djdk.module.main property is compatible
464 // with the archive). The xxx::serialize() functions for these data must be put inside
465 // MetaspaceShared::early_serialize(). Such functions must not produce side effects that
466 // assume we will always decides to map the archive.
467
468 void MetaspaceShared::early_serialize(SerializeClosure* soc) {
469 int tag = 0;
470 soc->do_tag(--tag);
471 CDS_JAVA_HEAP_ONLY(Modules::serialize_archived_module_info(soc);)
472 soc->do_tag(666);
473 }
474
475 void MetaspaceShared::serialize(SerializeClosure* soc) {
476 int tag = 0;
477 soc->do_tag(--tag);
478
479 // Verify the sizes of various metadata in the system.
480 soc->do_tag(sizeof(Method));
481 soc->do_tag(sizeof(ConstMethod));
482 soc->do_tag(arrayOopDesc::base_offset_in_bytes(T_BYTE));
483 soc->do_tag(sizeof(ConstantPool));
484 soc->do_tag(sizeof(ConstantPoolCache));
485 soc->do_tag(objArrayOopDesc::base_offset_in_bytes());
486 soc->do_tag(typeArrayOopDesc::base_offset_in_bytes(T_BYTE));
487 soc->do_tag(sizeof(Symbol));
488
489 // Need to do this first, as subsequent steps may call virtual functions
490 // in archived Metadata objects.
491 CppVtables::serialize(soc);
492 soc->do_tag(--tag);
493
494 // Dump/restore miscellaneous metadata.
495 JavaClasses::serialize_offsets(soc);
496 Universe::serialize(soc);
497 soc->do_tag(--tag);
498
499 // Dump/restore references to commonly used names and signatures.
500 vmSymbols::serialize(soc);
501 soc->do_tag(--tag);
502
503 // Dump/restore the symbol/string/subgraph_info tables
504 SymbolTable::serialize_shared_table_header(soc);
505 StringTable::serialize_shared_table_header(soc);
506 HeapShared::serialize_tables(soc);
507 SystemDictionaryShared::serialize_dictionary_headers(soc);
508 AOTLinkedClassBulkLoader::serialize(soc, true);
509 FinalImageRecipes::serialize(soc);
510 TrainingData::serialize(soc);
511 InstanceMirrorKlass::serialize_offsets(soc);
512
513 // Dump/restore well known classes (pointers)
514 SystemDictionaryShared::serialize_vm_classes(soc);
515 soc->do_tag(--tag);
516
517 CDS_JAVA_HEAP_ONLY(ClassLoaderDataShared::serialize(soc);)
518 soc->do_ptr((void**)&_archived_method_handle_intrinsics);
519
520 LambdaFormInvokers::serialize(soc);
521 AdapterHandlerLibrary::serialize_shared_table_header(soc);
522
523 soc->do_tag(666);
524 }
525
526 static void rewrite_nofast_bytecode(const methodHandle& method) {
527 BytecodeStream bcs(method);
528 while (!bcs.is_last_bytecode()) {
529 Bytecodes::Code opcode = bcs.next();
530 switch (opcode) {
531 case Bytecodes::_getfield: *bcs.bcp() = Bytecodes::_nofast_getfield; break;
532 case Bytecodes::_putfield: *bcs.bcp() = Bytecodes::_nofast_putfield; break;
533 case Bytecodes::_aload_0: *bcs.bcp() = Bytecodes::_nofast_aload_0; break;
534 case Bytecodes::_iload: {
535 if (!bcs.is_wide()) {
536 *bcs.bcp() = Bytecodes::_nofast_iload;
537 }
538 break;
539 }
540 default: break;
541 }
542 }
543 }
544
545 // [1] Rewrite all bytecodes as needed, so that the ConstMethod* will not be modified
546 // at run time by RewriteBytecodes/RewriteFrequentPairs
547 // [2] Assign a fingerprint, so one doesn't need to be assigned at run-time.
548 void MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread* thread, InstanceKlass* ik) {
549 for (int i = 0; i < ik->methods()->length(); i++) {
550 methodHandle m(thread, ik->methods()->at(i));
551 if (ik->can_be_verified_at_dumptime() && ik->is_linked()) {
552 rewrite_nofast_bytecode(m);
553 }
554 Fingerprinter fp(m);
555 // The side effect of this call sets method's fingerprint field.
556 fp.fingerprint();
557 }
558 }
559
560 class VM_PopulateDumpSharedSpace : public VM_Operation {
561 private:
562 ArchiveHeapInfo _heap_info;
563 FileMapInfo* _map_info;
564 StaticArchiveBuilder& _builder;
565
566 void dump_java_heap_objects();
567 void dump_shared_symbol_table(GrowableArray<Symbol*>* symbols) {
568 log_info(cds)("Dumping symbol table ...");
569 SymbolTable::write_to_archive(symbols);
570 }
571 char* dump_early_read_only_tables();
572 char* dump_read_only_tables(AOTClassLocationConfig*& cl_config);
573
574 public:
575
576 VM_PopulateDumpSharedSpace(StaticArchiveBuilder& b) :
577 VM_Operation(), _heap_info(), _map_info(nullptr), _builder(b) {}
578
579 bool skip_operation() const { return false; }
580
581 VMOp_Type type() const { return VMOp_PopulateDumpSharedSpace; }
582 ArchiveHeapInfo* heap_info() { return &_heap_info; }
583 FileMapInfo* map_info() const { return _map_info; }
584 void doit(); // outline because gdb sucks
585 bool allow_nested_vm_operations() const { return true; }
586 }; // class VM_PopulateDumpSharedSpace
587
588 class StaticArchiveBuilder : public ArchiveBuilder {
589 public:
590 StaticArchiveBuilder() : ArchiveBuilder() {}
591
592 virtual void iterate_roots(MetaspaceClosure* it) {
593 AOTArtifactFinder::all_cached_classes_do(it);
594 SystemDictionaryShared::dumptime_classes_do(it);
595 Universe::metaspace_pointers_do(it);
596 vmSymbols::metaspace_pointers_do(it);
597 TrainingData::iterate_roots(it);
598
599 // The above code should find all the symbols that are referenced by the
600 // archived classes. We just need to add the extra symbols which
601 // may not be used by any of the archived classes -- these are usually
602 // symbols that we anticipate to be used at run time, so we can store
603 // them in the RO region, to be shared across multiple processes.
604 if (_extra_symbols != nullptr) {
605 for (int i = 0; i < _extra_symbols->length(); i++) {
606 it->push(_extra_symbols->adr_at(i));
607 }
608 }
609
610 for (int i = 0; i < _pending_method_handle_intrinsics->length(); i++) {
611 it->push(_pending_method_handle_intrinsics->adr_at(i));
612 }
613 }
614 };
615
616 char* VM_PopulateDumpSharedSpace::dump_early_read_only_tables() {
617 ArchiveBuilder::OtherROAllocMark mark;
618
619 CDS_JAVA_HEAP_ONLY(Modules::dump_archived_module_info());
620
621 DumpRegion* ro_region = ArchiveBuilder::current()->ro_region();
622 char* start = ro_region->top();
623 WriteClosure wc(ro_region);
624 MetaspaceShared::early_serialize(&wc);
625 return start;
626 }
627
628 char* VM_PopulateDumpSharedSpace::dump_read_only_tables(AOTClassLocationConfig*& cl_config) {
629 ArchiveBuilder::OtherROAllocMark mark;
630
631 SystemDictionaryShared::write_to_archive();
632 cl_config = AOTClassLocationConfig::dumptime()->write_to_archive();
633 AOTClassLinker::write_to_archive();
634 if (CDSConfig::is_dumping_preimage_static_archive()) {
635 FinalImageRecipes::record_recipes();
636 }
637
638 TrainingData::dump_training_data();
639
640 MetaspaceShared::write_method_handle_intrinsics();
641
642 // Write lambform lines into archive
643 LambdaFormInvokers::dump_static_archive_invokers();
644
645 if (CDSConfig::is_dumping_adapters()) {
646 AdapterHandlerLibrary::archive_adapter_table();
647 }
648
649 // Write the other data to the output array.
650 DumpRegion* ro_region = ArchiveBuilder::current()->ro_region();
651 char* start = ro_region->top();
652 WriteClosure wc(ro_region);
653 MetaspaceShared::serialize(&wc);
654
655 return start;
656 }
657
658 void VM_PopulateDumpSharedSpace::doit() {
659 if (!CDSConfig::is_dumping_final_static_archive()) {
660 guarantee(!CDSConfig::is_using_archive(), "We should not be using an archive when we dump");
661 }
662
663 DEBUG_ONLY(SystemDictionaryShared::NoClassLoadingMark nclm);
664
665 _pending_method_handle_intrinsics = new (mtClassShared) GrowableArray<Method*>(256, mtClassShared);
666 if (CDSConfig::is_dumping_method_handles()) {
667 // When dumping AOT-linked classes, some classes may have direct references to a method handle
668 // intrinsic. The easiest thing is to save all of them into the AOT cache.
669 SystemDictionary::get_all_method_handle_intrinsics(_pending_method_handle_intrinsics);
670 }
671
672 AOTClassLocationConfig::dumptime_check_nonempty_dirs();
673
674 NOT_PRODUCT(SystemDictionary::verify();)
675
676 // Block concurrent class unloading from changing the _dumptime_table
677 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
678
679 #if INCLUDE_CDS_JAVA_HEAP
680 if (CDSConfig::is_dumping_heap() && _extra_interned_strings != nullptr) {
681 for (int i = 0; i < _extra_interned_strings->length(); i ++) {
682 OopHandle string = _extra_interned_strings->at(i);
683 HeapShared::add_to_dumped_interned_strings(string.resolve());
684 }
685 }
686 #endif
687
688 _builder.gather_source_objs();
689 _builder.reserve_buffer();
690
691 CppVtables::dumptime_init(&_builder);
692
693 _builder.sort_metadata_objs();
694 _builder.dump_rw_metadata();
695 _builder.dump_ro_metadata();
696 _builder.relocate_metaspaceobj_embedded_pointers();
697
698 log_info(cds)("Make classes shareable");
699 _builder.make_klasses_shareable();
700 MetaspaceShared::make_method_handle_intrinsics_shareable();
701
702 dump_java_heap_objects();
703 dump_shared_symbol_table(_builder.symbols());
704
705 char* early_serialized_data = dump_early_read_only_tables();
706 AOTClassLocationConfig* cl_config;
707 char* serialized_data = dump_read_only_tables(cl_config);
708
709 if (CDSConfig::is_dumping_lambdas_in_legacy_mode()) {
710 log_info(cds)("Adjust lambda proxy class dictionary");
711 LambdaProxyClassDictionary::adjust_dumptime_table();
712 }
713
714 log_info(cds)("Make training data shareable");
715 _builder.make_training_data_shareable();
716
717 // The vtable clones contain addresses of the current process.
718 // We don't want to write these addresses into the archive.
719 CppVtables::zero_archived_vtables();
720
721 // Write the archive file
722 if (CDSConfig::is_dumping_final_static_archive()) {
723 FileMapInfo::free_current_info(); // FIXME: should not free current info
724 }
725 const char* static_archive = CDSConfig::output_archive_path();
726 assert(static_archive != nullptr, "sanity");
727 _map_info = new FileMapInfo(static_archive, true);
728 _map_info->populate_header(MetaspaceShared::core_region_alignment());
729 _map_info->set_early_serialized_data(early_serialized_data);
730 _map_info->set_serialized_data(serialized_data);
731 _map_info->set_cloned_vtables(CppVtables::vtables_serialized_base());
732 _map_info->header()->set_class_location_config(cl_config);
733 }
734
735 class CollectClassesForLinking : public KlassClosure {
736 GrowableArray<OopHandle> _mirrors;
737
738 public:
739 CollectClassesForLinking() : _mirrors() {
740 // ClassLoaderDataGraph::loaded_classes_do_keepalive() requires ClassLoaderDataGraph_lock.
741 // We cannot link the classes while holding this lock (or else we may run into deadlock).
742 // Therefore, we need to first collect all the classes, keeping them alive by
743 // holding onto their java_mirrors in global OopHandles. We then link the classes after
744 // releasing the lock.
745 MutexLocker lock(ClassLoaderDataGraph_lock);
746 ClassLoaderDataGraph::loaded_classes_do_keepalive(this);
747 }
748
749 ~CollectClassesForLinking() {
750 for (int i = 0; i < _mirrors.length(); i++) {
751 _mirrors.at(i).release(Universe::vm_global());
752 }
753 }
754
755 void do_cld(ClassLoaderData* cld) {
756 assert(cld->is_alive(), "must be");
757 }
758
759 void do_klass(Klass* k) {
760 if (k->is_instance_klass()) {
761 _mirrors.append(OopHandle(Universe::vm_global(), k->java_mirror()));
762 }
763 }
764
765 const GrowableArray<OopHandle>* mirrors() const { return &_mirrors; }
766 };
767
768 // Check if we can eagerly link this class at dump time, so we can avoid the
769 // runtime linking overhead (especially verification)
770 bool MetaspaceShared::may_be_eagerly_linked(InstanceKlass* ik) {
771 if (CDSConfig::preserve_all_dumptime_verification_states(ik)) {
772 assert(ik->can_be_verified_at_dumptime(), "sanity");
773 }
774 if (!ik->can_be_verified_at_dumptime()) {
775 // For old classes, try to leave them in the unlinked state, so
776 // we can still store them in the archive. They must be
777 // linked/verified at runtime.
778 return false;
779 }
780
781 if (CDSConfig::is_dumping_dynamic_archive() && ik->is_shared_unregistered_class()) {
782 // Linking of unregistered classes at this stage may cause more
783 // classes to be resolved, resulting in calls to ClassLoader.loadClass()
784 // that may not be expected by custom class loaders.
785 //
786 // It's OK to do this for the built-in loaders as we know they can
787 // tolerate this.
788 return false;
789 }
790 return true;
791 }
792
793 void MetaspaceShared::link_shared_classes(TRAPS) {
794 AOTClassLinker::initialize();
795 AOTClassInitializer::init_test_class(CHECK);
796
797 while (true) {
798 ResourceMark rm(THREAD);
799 CollectClassesForLinking collect_classes;
800 bool has_linked = false;
801 const GrowableArray<OopHandle>* mirrors = collect_classes.mirrors();
802 for (int i = 0; i < mirrors->length(); i++) {
803 OopHandle mirror = mirrors->at(i);
804 InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(mirror.resolve()));
805 if (may_be_eagerly_linked(ik)) {
806 has_linked |= try_link_class(THREAD, ik);
807 }
808 if (CDSConfig::is_dumping_heap() && ik->is_linked() && !ik->is_initialized()) {
809 AOTClassInitializer::maybe_preinit_class(ik, CHECK);
810 }
811 }
812
813 if (!has_linked) {
814 break;
815 }
816 // Class linking includes verification which may load more classes.
817 // Keep scanning until we have linked no more classes.
818 }
819
820 // Resolve constant pool entries -- we don't load any new classes during this stage
821 {
822 ResourceMark rm(THREAD);
823 CollectClassesForLinking collect_classes;
824 const GrowableArray<OopHandle>* mirrors = collect_classes.mirrors();
825 for (int i = 0; i < mirrors->length(); i++) {
826 OopHandle mirror = mirrors->at(i);
827 InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(mirror.resolve()));
828 AOTConstantPoolResolver::dumptime_resolve_constants(ik, CHECK);
829 if (CDSConfig::is_dumping_preimage_static_archive()) {
830 FinalImageRecipes::add_reflection_data_flags(ik, CHECK);
831 }
832 }
833 }
834
835 if (CDSConfig::is_dumping_final_static_archive()) {
836 FinalImageRecipes::apply_recipes(CHECK);
837 }
838 }
839
840 // Preload classes from a list, populate the shared spaces and dump to a
841 // file.
842 void MetaspaceShared::preload_and_dump(TRAPS) {
843 CDSConfig::DumperThreadMark dumper_thread_mark(THREAD);
844 ResourceMark rm(THREAD);
845 HandleMark hm(THREAD);
846
847 if (CDSConfig::is_dumping_final_static_archive() && AOTPrintTrainingInfo) {
848 tty->print_cr("==================== archived_training_data ** before dumping ====================");
849 TrainingData::print_archived_training_data_on(tty);
850 }
851
852 StaticArchiveBuilder builder;
853 preload_and_dump_impl(builder, THREAD);
854 if (HAS_PENDING_EXCEPTION) {
855 if (PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())) {
856 log_error(cds)("Out of memory. Please run with a larger Java heap, current MaxHeapSize = "
857 "%zuM", MaxHeapSize/M);
858 MetaspaceShared::writing_error();
859 } else {
860 log_error(cds)("%s: %s", PENDING_EXCEPTION->klass()->external_name(),
861 java_lang_String::as_utf8_string(java_lang_Throwable::message(PENDING_EXCEPTION)));
862 MetaspaceShared::writing_error("Unexpected exception, use -Xlog:cds,exceptions=trace for detail");
863 }
864 if (CDSConfig::is_experimental_leyden_workflow()) {
865 vm_exit(1);
866 }
867 }
868
869 if (CDSConfig::new_aot_flags_used()) {
870 if (CDSConfig::is_dumping_preimage_static_archive()) {
871 // We are in the JVM that runs the training run. Continue execution,
872 // so that it can finish all clean-up and return the correct exit
873 // code to the OS.
874 } else {
875 // The JLI launcher only recognizes the "old" -Xshare:dump flag.
876 // When the new -XX:AOTMode=create flag is used, we can't return
877 // to the JLI launcher, as the launcher will fail when trying to
878 // run the main class, which is not what we want.
879 struct stat st;
880 if (os::stat(AOTCache, &st) != 0) {
881 tty->print_cr("AOTCache creation failed: %s", AOTCache);
882 vm_exit(0);
883 } else {
884 tty->print_cr("AOTCache creation is complete: %s " INT64_FORMAT " bytes", AOTCache, (int64_t)(st.st_size));
885 vm_exit(0);
886 }
887 }
888 }
889 }
890
891 #if INCLUDE_CDS_JAVA_HEAP && defined(_LP64)
892 void MetaspaceShared::adjust_heap_sizes_for_dumping() {
893 if (!CDSConfig::is_dumping_heap() || UseCompressedOops) {
894 return;
895 }
896 // CDS heap dumping requires all string oops to have an offset
897 // from the heap bottom that can be encoded in 32-bit.
898 julong max_heap_size = (julong)(4 * G);
899
900 if (MinHeapSize > max_heap_size) {
901 log_debug(cds)("Setting MinHeapSize to 4G for CDS dumping, original size = %zuM", MinHeapSize/M);
902 FLAG_SET_ERGO(MinHeapSize, max_heap_size);
903 }
904 if (InitialHeapSize > max_heap_size) {
905 log_debug(cds)("Setting InitialHeapSize to 4G for CDS dumping, original size = %zuM", InitialHeapSize/M);
906 FLAG_SET_ERGO(InitialHeapSize, max_heap_size);
907 }
908 if (MaxHeapSize > max_heap_size) {
909 log_debug(cds)("Setting MaxHeapSize to 4G for CDS dumping, original size = %zuM", MaxHeapSize/M);
910 FLAG_SET_ERGO(MaxHeapSize, max_heap_size);
911 }
912 }
913 #endif // INCLUDE_CDS_JAVA_HEAP && _LP64
914
915 void MetaspaceShared::get_default_classlist(char* default_classlist, const size_t buf_size) {
916 const char* filesep = os::file_separator();
917 jio_snprintf(default_classlist, buf_size, "%s%slib%sclasslist",
918 Arguments::get_java_home(), filesep, filesep);
919 }
920
921 void MetaspaceShared::preload_classes(TRAPS) {
922 char default_classlist[JVM_MAXPATHLEN];
923 const char* classlist_path;
924
925 get_default_classlist(default_classlist, JVM_MAXPATHLEN);
926 if (SharedClassListFile == nullptr) {
927 classlist_path = default_classlist;
928 } else {
929 classlist_path = SharedClassListFile;
930 }
931
932 log_info(cds)("Loading classes to share ...");
933 ClassListParser::parse_classlist(classlist_path,
934 ClassListParser::_parse_all, CHECK);
935 if (ExtraSharedClassListFile) {
936 ClassListParser::parse_classlist(ExtraSharedClassListFile,
937 ClassListParser::_parse_all, CHECK);
938 }
939 if (classlist_path != default_classlist) {
940 struct stat statbuf;
941 if (os::stat(default_classlist, &statbuf) == 0) {
942 // File exists, let's use it.
943 ClassListParser::parse_classlist(default_classlist,
944 ClassListParser::_parse_lambda_forms_invokers_only, CHECK);
945 }
946 }
947
948 // Some classes are used at CDS runtime but are not loaded, and therefore archived, at
949 // dumptime. We can perform dummmy calls to these classes at dumptime to ensure they
950 // are archived.
951 exercise_runtime_cds_code(CHECK);
952
953 log_info(cds)("Loading classes to share: done.");
954 }
955
956 void MetaspaceShared::exercise_runtime_cds_code(TRAPS) {
957 // Exercise the manifest processing code
958 const char* dummy = "Manifest-Version: 1.0\n";
959 CDSProtectionDomain::create_jar_manifest(dummy, strlen(dummy), CHECK);
960
961 // Exercise FileSystem and URL code
962 CDSProtectionDomain::to_file_URL("dummy.jar", Handle(), CHECK);
963 }
964
965 bool MetaspaceShared::is_recording_preimage_static_archive() {
966 if (CDSConfig::is_dumping_preimage_static_archive()) {
967 return _preimage_static_archive_dumped == 0;
968 }
969 return false;
970 }
971
972 void MetaspaceShared::preload_and_dump_impl(StaticArchiveBuilder& builder, TRAPS) {
973 if (CDSConfig::is_dumping_preimage_static_archive()) {
974 if (Atomic::cmpxchg(&_preimage_static_archive_dumped, 0, 1) != 0) {
975 return;
976 }
977 }
978
979 if (CDSConfig::is_dumping_classic_static_archive()) {
980 // We are running with -Xshare:dump
981 preload_classes(CHECK);
982
983 if (SharedArchiveConfigFile) {
984 log_info(cds)("Reading extra data from %s ...", SharedArchiveConfigFile);
985 read_extra_data(THREAD, SharedArchiveConfigFile);
986 log_info(cds)("Reading extra data: done.");
987 }
988 }
989
990 if (CDSConfig::is_dumping_preimage_static_archive()) {
991 log_info(cds)("Reading lambda form invokers from JDK default classlist ...");
992 char default_classlist[JVM_MAXPATHLEN];
993 get_default_classlist(default_classlist, JVM_MAXPATHLEN);
994 struct stat statbuf;
995 if (os::stat(default_classlist, &statbuf) == 0) {
996 ClassListParser::parse_classlist(default_classlist,
997 ClassListParser::_parse_lambda_forms_invokers_only, CHECK);
998 }
999 }
1000
1001 #if INCLUDE_CDS_JAVA_HEAP
1002 if (CDSConfig::is_dumping_heap()) {
1003 assert(CDSConfig::allow_only_single_java_thread(), "Required");
1004 if (!HeapShared::is_archived_boot_layer_available(THREAD)) {
1005 log_info(cds)("archivedBootLayer not available, disabling full module graph");
1006 CDSConfig::stop_dumping_full_module_graph();
1007 }
1008 // Do this before link_shared_classes(), as the following line may load new classes.
1009 HeapShared::init_for_dumping(CHECK);
1010 }
1011 #endif
1012
1013 if (CDSConfig::is_dumping_final_static_archive()) {
1014 if (ExtraSharedClassListFile) {
1015 log_info(cds)("Loading extra classes from %s ...", ExtraSharedClassListFile);
1016 ClassListParser::parse_classlist(ExtraSharedClassListFile,
1017 ClassListParser::_parse_all, CHECK);
1018 }
1019 }
1020
1021 // Rewrite and link classes
1022 log_info(cds)("Rewriting and linking classes ...");
1023
1024 // Link any classes which got missed. This would happen if we have loaded classes that
1025 // were not explicitly specified in the classlist. E.g., if an interface implemented by class K
1026 // fails verification, all other interfaces that were not specified in the classlist but
1027 // are implemented by K are not verified.
1028 link_shared_classes(CHECK);
1029 log_info(cds)("Rewriting and linking classes: done");
1030
1031 if (CDSConfig::is_dumping_final_static_archive()) {
1032 assert(!AOTRecordTraining, "must be");
1033 if (CDSConfig::is_dumping_aot_linked_classes()) {
1034 AOTRecordTraining = true;
1035 }
1036 }
1037
1038 TrainingData::init_dumptime_table(CHECK); // captures TrainingDataSetLocker
1039
1040 if (CDSConfig::is_dumping_regenerated_lambdaform_invokers()) {
1041 LambdaFormInvokers::regenerate_holder_classes(CHECK);
1042 }
1043
1044 #if INCLUDE_CDS_JAVA_HEAP
1045 if (CDSConfig::is_dumping_heap()) {
1046 ArchiveHeapWriter::init();
1047 if (CDSConfig::is_dumping_full_module_graph()) {
1048 ClassLoaderDataShared::ensure_module_entry_tables_exist();
1049 HeapShared::reset_archived_object_states(CHECK);
1050 }
1051
1052 if (ArchiveLoaderLookupCache) {
1053 SystemDictionaryShared::create_loader_positive_lookup_cache(CHECK);
1054 }
1055
1056 if (CDSConfig::is_initing_classes_at_dump_time()) {
1057 // java.lang.Class::reflectionFactory cannot be archived yet. We set this field
1058 // to null, and it will be initialized again at runtime.
1059 log_debug(cds)("Resetting Class::reflectionFactory");
1060 TempNewSymbol method_name = SymbolTable::new_symbol("resetArchivedStates");
1061 Symbol* method_sig = vmSymbols::void_method_signature();
1062 JavaValue result(T_VOID);
1063 JavaCalls::call_static(&result, vmClasses::Class_klass(),
1064 method_name, method_sig, CHECK);
1065
1066 // Perhaps there is a way to avoid hard-coding these names here.
1067 // See discussion in JDK-8342481.
1068 }
1069
1070 // Do this at the very end, when no Java code will be executed. Otherwise
1071 // some new strings may be added to the intern table.
1072 StringTable::allocate_shared_strings_array(CHECK);
1073 } else {
1074 log_info(cds)("Not dumping heap, reset CDSConfig::_is_using_optimized_module_handling");
1075 CDSConfig::stop_using_optimized_module_handling();
1076 }
1077 #endif
1078
1079 VM_PopulateDumpSharedSpace op(builder);
1080 VMThread::execute(&op);
1081 FileMapInfo* mapinfo = op.map_info();
1082 ArchiveHeapInfo* heap_info = op.heap_info();
1083
1084 if (CDSConfig::is_dumping_final_static_archive()) {
1085 AOTRecordTraining = false;
1086 if (StoreCachedCode) {
1087 if (log_is_enabled(Info, cds, jit)) {
1088 CDSAccess::test_heap_access_api();
1089 }
1090
1091 // We have just created the final image. Let's run the AOT compiler
1092 if (AOTPrintTrainingInfo) {
1093 tty->print_cr("==================== archived_training_data ** after dumping ====================");
1094 TrainingData::print_archived_training_data_on(tty);
1095 }
1096
1097 CDSConfig::enable_dumping_cached_code();
1098 {
1099 builder.start_cc_region();
1100 Precompiler::compile_cached_code(&builder, CHECK);
1101 // Write the contents to cached code region and close SCCache before packing the region
1102 SCCache::close();
1103 builder.end_cc_region();
1104 }
1105 CDSConfig::disable_dumping_cached_code();
1106 }
1107 }
1108
1109 bool status = write_static_archive(&builder, mapinfo, heap_info);
1110 if (status && CDSConfig::is_dumping_preimage_static_archive()) {
1111 if (CDSConfig::is_experimental_leyden_workflow()) {
1112 fork_and_dump_final_static_archive_experimental_leyden_workflow(CHECK);
1113 } else {
1114 tty->print_cr("%s AOTConfiguration recorded: %s",
1115 CDSConfig::has_temp_aot_config_file() ? "Temporary" : "", AOTConfiguration);
1116 if (CDSConfig::is_one_step_training()) {
1117 fork_and_dump_final_static_archive(CHECK);
1118 }
1119 }
1120 }
1121
1122 if (!status) {
1123 THROW_MSG(vmSymbols::java_io_IOException(), "Encountered error while dumping");
1124 }
1125 }
1126
1127 bool MetaspaceShared::write_static_archive(ArchiveBuilder* builder, FileMapInfo* map_info, ArchiveHeapInfo* heap_info) {
1128 // relocate the data so that it can be mapped to MetaspaceShared::requested_base_address()
1129 // without runtime relocation.
1130 builder->relocate_to_requested();
1131
1132 map_info->open_as_output();
1133 if (!map_info->is_open()) {
1134 return false;
1135 }
1136 builder->write_archive(map_info, heap_info);
1137
1138 if (AllowArchivingWithJavaAgent) {
1139 log_warning(cds)("This %s was created with AllowArchivingWithJavaAgent. It should be used "
1140 "for testing purposes only and should not be used in a production environment", CDSConfig::type_of_archive_being_loaded());
1141 }
1142 return true;
1143 }
1144
1145 static void print_java_launcher(outputStream* st) {
1146 st->print("%s%sbin%sjava", Arguments::get_java_home(), os::file_separator(), os::file_separator());
1147 }
1148
1149 static void append_args(GrowableArray<Handle>* args, const char* arg, TRAPS) {
1150 Handle string = java_lang_String::create_from_str(arg, CHECK);
1151 args->append(string);
1152 }
1153
1154 // Pass all options in Arguments::jvm_args_array() to a child JVM process
1155 // using the JAVA_TOOL_OPTIONS environment variable.
1156 static int exec_jvm_with_java_tool_options(const char* java_launcher_path, TRAPS) {
1157 ResourceMark rm(THREAD);
1158 HandleMark hm(THREAD);
1159 GrowableArray<Handle> args;
1160
1161 const char* cp = Arguments::get_appclasspath();
1162 if (cp != nullptr && strlen(cp) > 0 && strcmp(cp, ".") != 0) {
1163 // We cannot use "-cp", because "-cp" is only interpreted by the java launcher,
1164 // and is not interpreter by arguments.cpp when it loads args from JAVA_TOOL_OPTIONS
1165 stringStream ss;
1166 ss.print("-Djava.class.path=");
1167 ss.print_raw(cp);
1168 append_args(&args, ss.freeze(), CHECK_0);
1169 // CDS$ProcessLauncher::execWithJavaToolOptions() must unset CLASSPATH, which has
1170 // a higher priority than -Djava.class.path=
1171 }
1172
1173 // Pass all arguments. These include those from JAVA_TOOL_OPTIONS and _JAVA_OPTIONS.
1174 for (int i = 0; i < Arguments::num_jvm_args(); i++) {
1175 const char* arg = Arguments::jvm_args_array()[i];
1176 if (strncmp("-XX:AOTMode", arg, 11) == 0) {
1177 // Filter it out. We will set AOTMode=create below.
1178 } else {
1179 append_args(&args, arg, CHECK_0);
1180 }
1181 }
1182
1183 // We don't pass Arguments::jvm_flags_array(), as those will be added by
1184 // the child process when it loads .hotspotrc
1185
1186 if (CDSConfig::is_experimental_leyden_workflow()) {
1187 stringStream ss;
1188 ss.print("-XX:CDSPreimage=");
1189 ss.print_raw(CDSPreimage);
1190 append_args(&args, ss.freeze(), CHECK_0);
1191 } else {
1192 if (CDSConfig::has_temp_aot_config_file()) {
1193 stringStream ss;
1194 ss.print("-XX:AOTConfiguration=");
1195 ss.print_raw(AOTConfiguration);
1196 append_args(&args, ss.freeze(), CHECK_0);
1197 }
1198 append_args(&args, "-XX:AOTMode=create", CHECK_0);
1199 }
1200
1201 GrowableArray<const char*> aot_tool_options;
1202 jint code;
1203 if ((code = Arguments::parse_aot_tool_options_environment_variable(&aot_tool_options)) != JNI_OK) {
1204 THROW_MSG_0(vmSymbols::java_lang_InternalError(), err_msg("failed to parse AOT_TOOL_OPTIONS: %d", code));
1205 }
1206 for (int i = 0; i < aot_tool_options.length(); i++) {
1207 append_args(&args, aot_tool_options.at(i), CHECK_0);
1208 }
1209
1210 Symbol* klass_name = SymbolTable::new_symbol("jdk/internal/misc/CDS$ProcessLauncher");
1211 Klass* k = SystemDictionary::resolve_or_fail(klass_name, true, CHECK_0);
1212 Symbol* methodName = SymbolTable::new_symbol("execWithJavaToolOptions");
1213 Symbol* methodSignature = SymbolTable::new_symbol("(Ljava/lang/String;[Ljava/lang/String;)I");
1214
1215 Handle launcher = java_lang_String::create_from_str(java_launcher_path, CHECK_0);
1216 objArrayOop array = oopFactory::new_objArray(vmClasses::String_klass(), args.length(), CHECK_0);
1217 for (int i = 0; i < args.length(); i++) {
1218 array->obj_at_put(i, args.at(i)());
1219 }
1220 objArrayHandle launcher_args(THREAD, array);
1221
1222 // The following call will pass all options inside the JAVA_TOOL_OPTIONS env variable to
1223 // the child process. It will also clear the _JAVA_OPTIONS and CLASSPATH env variables for
1224 // the child process.
1225 //
1226 // Note: the env variables are set only for the child process. They are not changed
1227 // for the current process. See java.lang.ProcessBuilder::environment().
1228 JavaValue result(T_OBJECT);
1229 JavaCallArguments javacall_args(2);
1230 javacall_args.push_oop(launcher);
1231 javacall_args.push_oop(launcher_args);
1232 JavaCalls::call_static(&result,
1233 InstanceKlass::cast(k),
1234 methodName,
1235 methodSignature,
1236 &javacall_args,
1237 CHECK_0);
1238 return result.get_jint();
1239 }
1240
1241 // This is for debugging purposes only (-XX:+CDSManualFinalImage) so we don't bother
1242 // quoating any special characters. The user should avoid using special chars.
1243 static void print_vm_arguments(outputStream* st) {
1244 const char* cp = Arguments::get_appclasspath();
1245 if (cp != nullptr && strlen(cp) > 0 && strcmp(cp, ".") != 0) {
1246 st->print(" -cp "); st->print_raw(cp);
1247 }
1248 for (int i = 0; i < Arguments::num_jvm_args(); i++) {
1249 st->print(" %s", Arguments::jvm_args_array()[i]);
1250 }
1251 }
1252
1253 void MetaspaceShared::fork_and_dump_final_static_archive_experimental_leyden_workflow(TRAPS) {
1254 assert(CDSConfig::is_dumping_preimage_static_archive(), "sanity");
1255
1256 ResourceMark rm;
1257 stringStream ss;
1258 print_java_launcher(&ss);
1259
1260 if (CDSManualFinalImage) {
1261 print_vm_arguments(&ss);
1262 ss.print(" -XX:CDSPreimage=%s", SharedArchiveFile);
1263 const char* cmd = ss.freeze();
1264
1265 tty->print_cr("-XX:+CDSManualFinalImage is specified");
1266 tty->print_cr("Please manually execute the following command to create the final CDS image:");
1267 tty->print(" "); tty->print_raw_cr(cmd);
1268
1269 // The following is useful if the dumping was trigger by a script that builds
1270 // a complex command-line.
1271 tty->print_cr("Note: to recreate the preimage only:");
1272 tty->print_cr(" rm -f %s", CacheDataStore);
1273 tty->print(" ");
1274 print_java_launcher(tty);
1275 print_vm_arguments(tty);
1276 if (Arguments::java_command() != nullptr) {
1277 tty->print(" %s", Arguments::java_command());
1278 }
1279 tty->cr();
1280 } else {
1281 const char* cmd = ss.freeze();
1282 log_info(cds)("Launching child process to create final CDS image:");
1283 log_info(cds)(" %s", cmd);
1284 int status = exec_jvm_with_java_tool_options(cmd, CHECK);
1285 if (status != 0) {
1286 log_error(cds)("Child process finished; status = %d", status);
1287 log_error(cds)("To reproduce the error");
1288 ResourceMark rm;
1289 LogStream ls(Log(cds)::error());
1290 ls.print(" "); ls.print_raw_cr(cmd);
1291
1292 // The following is useful if the dumping was trigger by a script that builds
1293 // a complex command-line.
1294 ls.print_cr("Note: to recreate the preimage only:");
1295 ls.print_cr(" rm -f %s", CacheDataStore);
1296 ls.print(" ");
1297 print_java_launcher(&ls);
1298 print_vm_arguments(&ls);
1299 ls.print(" -XX:+UnlockDiagnosticVMOptions -XX:+CDSManualFinalImage");
1300 if (Arguments::java_command() != nullptr) {
1301 ls.print(" %s", Arguments::java_command());
1302 }
1303 ls.cr();
1304
1305 vm_direct_exit(status);
1306 } else {
1307 log_info(cds)("Child process finished; status = %d", status);
1308 // On Windows, need WRITE permission to remove the file.
1309 WINDOWS_ONLY(chmod(CDSPreimage, _S_IREAD | _S_IWRITE));
1310 status = remove(CDSPreimage);
1311 if (status != 0) {
1312 log_error(cds)("Failed to remove CDSPreimage file %s", CDSPreimage);
1313 } else {
1314 log_info(cds)("Removed CDSPreimage file %s", CDSPreimage);
1315 }
1316 }
1317 }
1318 }
1319
1320 void MetaspaceShared::fork_and_dump_final_static_archive(TRAPS) {
1321 assert(CDSConfig::is_dumping_preimage_static_archive(), "sanity");
1322
1323 ResourceMark rm;
1324 stringStream ss;
1325 print_java_launcher(&ss);
1326 const char* cmd = ss.freeze();
1327 tty->print_cr("Launching child process %s to assemble AOT cache %s using configuration %s", cmd, AOTCacheOutput, AOTConfiguration);
1328 int status = exec_jvm_with_java_tool_options(cmd, CHECK);
1329 if (status != 0) {
1330 log_error(cds)("Child process failed; status = %d", status);
1331 // We leave the temp config file for debugging
1332 } else if (CDSConfig::has_temp_aot_config_file()) {
1333 const char* tmp_config = AOTConfiguration;
1334 // On Windows, need WRITE permission to remove the file.
1335 WINDOWS_ONLY(chmod(tmp_config, _S_IREAD | _S_IWRITE));
1336 status = remove(tmp_config);
1337 if (status != 0) {
1338 log_error(cds)("Failed to remove temporary AOT configuration file %s", tmp_config);
1339 } else {
1340 tty->print_cr("Removed temporary AOT configuration file %s", tmp_config);
1341 }
1342 }
1343 }
1344
1345 // Returns true if the class's status has changed.
1346 bool MetaspaceShared::try_link_class(JavaThread* current, InstanceKlass* ik) {
1347 ExceptionMark em(current);
1348 JavaThread* THREAD = current; // For exception macros.
1349 assert(CDSConfig::is_dumping_archive(), "sanity");
1350
1351 if (ik->is_shared() && !CDSConfig::is_dumping_final_static_archive()) {
1352 assert(CDSConfig::is_dumping_dynamic_archive(), "must be");
1353 return false;
1354 }
1355
1356 if (ik->is_loaded() && !ik->is_linked() && ik->can_be_verified_at_dumptime() &&
1357 !SystemDictionaryShared::has_class_failed_verification(ik)) {
1358 bool saved = BytecodeVerificationLocal;
1359 if (ik->is_shared_unregistered_class() && ik->class_loader() == nullptr) {
1360 // The verification decision is based on BytecodeVerificationRemote
1361 // for non-system classes. Since we are using the null classloader
1362 // to load non-system classes for customized class loaders during dumping,
1363 // we need to temporarily change BytecodeVerificationLocal to be the same as
1364 // BytecodeVerificationRemote. Note this can cause the parent system
1365 // classes also being verified. The extra overhead is acceptable during
1366 // dumping.
1367 BytecodeVerificationLocal = BytecodeVerificationRemote;
1368 }
1369 ik->link_class(THREAD);
1370 if (HAS_PENDING_EXCEPTION) {
1371 ResourceMark rm(THREAD);
1372 log_warning(cds)("Preload Warning: Verification failed for %s",
1373 ik->external_name());
1374 CLEAR_PENDING_EXCEPTION;
1375 SystemDictionaryShared::set_class_has_failed_verification(ik);
1376 } else {
1377 assert(!SystemDictionaryShared::has_class_failed_verification(ik), "sanity");
1378 ik->compute_has_loops_flag_for_methods();
1379 }
1380 BytecodeVerificationLocal = saved;
1381 return true;
1382 } else {
1383 return false;
1384 }
1385 }
1386
1387 void VM_PopulateDumpSharedSpace::dump_java_heap_objects() {
1388 if (CDSConfig::is_dumping_heap()) {
1389 HeapShared::write_heap(&_heap_info);
1390 } else if (!CDSConfig::is_dumping_preimage_static_archive()) {
1391 CDSConfig::log_reasons_for_not_dumping_heap();
1392 }
1393 }
1394
1395 void MetaspaceShared::set_shared_metaspace_range(void* base, void *static_top, void* top) {
1396 assert(base <= static_top && static_top <= top, "must be");
1397 _shared_metaspace_static_top = static_top;
1398 MetaspaceObj::set_shared_metaspace_range(base, top);
1399 }
1400
1401 bool MetaspaceShared::is_shared_dynamic(void* p) {
1402 if ((p < MetaspaceObj::shared_metaspace_top()) &&
1403 (p >= _shared_metaspace_static_top)) {
1404 return true;
1405 } else {
1406 return false;
1407 }
1408 }
1409
1410 bool MetaspaceShared::is_shared_static(void* p) {
1411 if (is_in_shared_metaspace(p) && !is_shared_dynamic(p)) {
1412 return true;
1413 } else {
1414 return false;
1415 }
1416 }
1417
1418 // This function is called when the JVM is unable to load the specified archive(s) due to one
1419 // of the following conditions.
1420 // - There's an error that indicates that the archive(s) files were corrupt or otherwise damaged.
1421 // - When -XX:+RequireSharedSpaces is specified, AND the JVM cannot load the archive(s) due
1422 // to version or classpath mismatch.
1423 void MetaspaceShared::unrecoverable_loading_error(const char* message) {
1424 log_error(cds)("An error has occurred while processing the %s.", CDSConfig::type_of_archive_being_loaded());
1425 if (message != nullptr) {
1426 log_error(cds)("%s", message);
1427 }
1428
1429 if (CDSConfig::is_dumping_final_static_archive()) {
1430 vm_exit_during_initialization("Must be a valid AOT configuration generated by the current JVM", AOTConfiguration);
1431 } else if (CDSConfig::new_aot_flags_used()) {
1432 vm_exit_during_initialization("Unable to use AOT cache.", nullptr);
1433 } else {
1434 vm_exit_during_initialization("Unable to use shared archive.", nullptr);
1435 }
1436 }
1437
1438 // This function is called when the JVM is unable to write the specified CDS archive due to an
1439 // unrecoverable error.
1440 void MetaspaceShared::unrecoverable_writing_error(const char* message) {
1441 writing_error(message);
1442 vm_direct_exit(1);
1443 }
1444
1445 // This function is called when the JVM is unable to write the specified CDS archive due to a
1446 // an error. The error will be propagated
1447 void MetaspaceShared::writing_error(const char* message) {
1448 log_error(cds)("An error has occurred while writing the shared archive file.");
1449 if (message != nullptr) {
1450 log_error(cds)("%s", message);
1451 }
1452 }
1453
1454 void MetaspaceShared::initialize_runtime_shared_and_meta_spaces() {
1455 assert(CDSConfig::is_using_archive(), "Must be called when UseSharedSpaces is enabled");
1456 MapArchiveResult result = MAP_ARCHIVE_OTHER_FAILURE;
1457
1458 FileMapInfo* static_mapinfo = FileMapInfo::current_info();
1459 FileMapInfo* dynamic_mapinfo = nullptr;
1460
1461 if (static_mapinfo != nullptr) {
1462 log_info(cds)("Core region alignment: %zu", static_mapinfo->core_region_alignment());
1463 dynamic_mapinfo = open_dynamic_archive();
1464
1465 log_info(cds)("ArchiveRelocationMode: %d", ArchiveRelocationMode);
1466
1467 // First try to map at the requested address
1468 result = map_archives(static_mapinfo, dynamic_mapinfo, true);
1469 if (result == MAP_ARCHIVE_MMAP_FAILURE) {
1470 // Mapping has failed (probably due to ASLR). Let's map at an address chosen
1471 // by the OS.
1472 log_info(cds)("Try to map archive(s) at an alternative address");
1473 result = map_archives(static_mapinfo, dynamic_mapinfo, false);
1474 }
1475 }
1476
1477 if (result == MAP_ARCHIVE_SUCCESS) {
1478 bool dynamic_mapped = (dynamic_mapinfo != nullptr && dynamic_mapinfo->is_mapped());
1479 char* cds_base = static_mapinfo->mapped_base();
1480 char* cds_end = dynamic_mapped ? dynamic_mapinfo->mapped_end() : static_mapinfo->mapped_end();
1481 // Register CDS memory region with LSan.
1482 LSAN_REGISTER_ROOT_REGION(cds_base, cds_end - cds_base);
1483 set_shared_metaspace_range(cds_base, static_mapinfo->mapped_end(), cds_end);
1484 _relocation_delta = static_mapinfo->relocation_delta();
1485 _requested_base_address = static_mapinfo->requested_base_address();
1486 if (dynamic_mapped) {
1487 // turn AutoCreateSharedArchive off if successfully mapped
1488 AutoCreateSharedArchive = false;
1489 }
1490 } else {
1491 set_shared_metaspace_range(nullptr, nullptr, nullptr);
1492 if (CDSConfig::is_dumping_dynamic_archive()) {
1493 log_warning(cds)("-XX:ArchiveClassesAtExit is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info.");
1494 }
1495 UseSharedSpaces = false;
1496 // The base archive cannot be mapped. We cannot dump the dynamic shared archive.
1497 AutoCreateSharedArchive = false;
1498 CDSConfig::disable_dumping_dynamic_archive();
1499 log_info(cds)("Unable to map shared spaces");
1500 if (PrintSharedArchiveAndExit) {
1501 MetaspaceShared::unrecoverable_loading_error("Unable to use shared archive.");
1502 } else if (RequireSharedSpaces) {
1503 MetaspaceShared::unrecoverable_loading_error("Unable to map shared spaces");
1504 } else if (CDSConfig::is_dumping_final_static_archive()) {
1505 assert(CDSPreimage != nullptr, "must be");
1506 log_error(cds)("Unable to map shared spaces for CDSPreimage = %s", CDSPreimage);
1507 MetaspaceShared::unrecoverable_loading_error();
1508 }
1509 }
1510
1511 // If mapping failed and -XShare:on, the vm should exit
1512 bool has_failed = false;
1513 if (static_mapinfo != nullptr && !static_mapinfo->is_mapped()) {
1514 has_failed = true;
1515 delete static_mapinfo;
1516 }
1517 if (dynamic_mapinfo != nullptr && !dynamic_mapinfo->is_mapped()) {
1518 has_failed = true;
1519 delete dynamic_mapinfo;
1520 }
1521 if (RequireSharedSpaces && has_failed) {
1522 // static archive mapped but dynamic archive failed
1523 MetaspaceShared::unrecoverable_loading_error("Unable to map shared spaces");
1524 }
1525 }
1526
1527 // This is called very early at VM start up to get the size of the cached_code region
1528 void MetaspaceShared::open_static_archive() {
1529 if (!UseSharedSpaces) { // FIXME -- is this still needed??
1530 return;
1531 }
1532 const char* static_archive = CDSConfig::input_static_archive_path();
1533 assert(static_archive != nullptr, "sanity");
1534 FileMapInfo* mapinfo = new FileMapInfo(static_archive, true);
1535 if (!mapinfo->open_as_input()) {
1536 delete(mapinfo);
1537 } else {
1538 FileMapRegion* r = mapinfo->region_at(MetaspaceShared::cc);
1539 CDSAccess::set_cached_code_size(r->used_aligned());
1540 }
1541 }
1542
1543 FileMapInfo* MetaspaceShared::open_dynamic_archive() {
1544 if (CDSConfig::is_dumping_dynamic_archive()) {
1545 return nullptr;
1546 }
1547 const char* dynamic_archive = CDSConfig::input_dynamic_archive_path();
1548 if (dynamic_archive == nullptr) {
1549 return nullptr;
1550 }
1551
1552 FileMapInfo* mapinfo = new FileMapInfo(dynamic_archive, false);
1553 if (!mapinfo->open_as_input()) {
1554 delete(mapinfo);
1555 if (RequireSharedSpaces) {
1556 MetaspaceShared::unrecoverable_loading_error("Failed to initialize dynamic archive");
1557 }
1558 return nullptr;
1559 }
1560 return mapinfo;
1561 }
1562
1563 // use_requested_addr:
1564 // true = map at FileMapHeader::_requested_base_address
1565 // false = map at an alternative address picked by OS.
1566 MapArchiveResult MetaspaceShared::map_archives(FileMapInfo* static_mapinfo, FileMapInfo* dynamic_mapinfo,
1567 bool use_requested_addr) {
1568 if (use_requested_addr && static_mapinfo->requested_base_address() == nullptr) {
1569 log_info(cds)("Archive(s) were created with -XX:SharedBaseAddress=0. Always map at os-selected address.");
1570 return MAP_ARCHIVE_MMAP_FAILURE;
1571 }
1572
1573 PRODUCT_ONLY(if (ArchiveRelocationMode == 1 && use_requested_addr) {
1574 // For product build only -- this is for benchmarking the cost of doing relocation.
1575 // For debug builds, the check is done below, after reserving the space, for better test coverage
1576 // (see comment below).
1577 log_info(cds)("ArchiveRelocationMode == 1: always map archive(s) at an alternative address");
1578 return MAP_ARCHIVE_MMAP_FAILURE;
1579 });
1580
1581 if (ArchiveRelocationMode == 2 && !use_requested_addr) {
1582 log_info(cds)("ArchiveRelocationMode == 2: never map archive(s) at an alternative address");
1583 return MAP_ARCHIVE_MMAP_FAILURE;
1584 };
1585
1586 if (dynamic_mapinfo != nullptr) {
1587 // Ensure that the OS won't be able to allocate new memory spaces between the two
1588 // archives, or else it would mess up the simple comparison in MetaspaceObj::is_shared().
1589 assert(static_mapinfo->mapping_end_offset() == dynamic_mapinfo->mapping_base_offset(), "no gap");
1590 }
1591
1592 ReservedSpace total_space_rs, archive_space_rs, class_space_rs;
1593 MapArchiveResult result = MAP_ARCHIVE_OTHER_FAILURE;
1594 size_t prot_zone_size = 0;
1595 char* mapped_base_address = reserve_address_space_for_archives(static_mapinfo,
1596 dynamic_mapinfo,
1597 use_requested_addr,
1598 total_space_rs,
1599 archive_space_rs,
1600 class_space_rs);
1601 if (mapped_base_address == nullptr) {
1602 result = MAP_ARCHIVE_MMAP_FAILURE;
1603 log_debug(cds)("Failed to reserve spaces (use_requested_addr=%u)", (unsigned)use_requested_addr);
1604 } else {
1605
1606 if (Metaspace::using_class_space()) {
1607 prot_zone_size = protection_zone_size();
1608 }
1609
1610 #ifdef ASSERT
1611 // Some sanity checks after reserving address spaces for archives
1612 // and class space.
1613 assert(archive_space_rs.is_reserved(), "Sanity");
1614 if (Metaspace::using_class_space()) {
1615 assert(archive_space_rs.base() == mapped_base_address &&
1616 archive_space_rs.size() > protection_zone_size(),
1617 "Archive space must lead and include the protection zone");
1618 // Class space must closely follow the archive space. Both spaces
1619 // must be aligned correctly.
1620 assert(class_space_rs.is_reserved() && class_space_rs.size() > 0,
1621 "A class space should have been reserved");
1622 assert(class_space_rs.base() >= archive_space_rs.end(),
1623 "class space should follow the cds archive space");
1624 assert(is_aligned(archive_space_rs.base(),
1625 core_region_alignment()),
1626 "Archive space misaligned");
1627 assert(is_aligned(class_space_rs.base(),
1628 Metaspace::reserve_alignment()),
1629 "class space misaligned");
1630 }
1631 #endif // ASSERT
1632
1633 log_info(cds)("Reserved archive_space_rs [" INTPTR_FORMAT " - " INTPTR_FORMAT "] (%zu) bytes%s",
1634 p2i(archive_space_rs.base()), p2i(archive_space_rs.end()), archive_space_rs.size(),
1635 (prot_zone_size > 0 ? " (includes protection zone)" : ""));
1636 log_info(cds)("Reserved class_space_rs [" INTPTR_FORMAT " - " INTPTR_FORMAT "] (%zu) bytes",
1637 p2i(class_space_rs.base()), p2i(class_space_rs.end()), class_space_rs.size());
1638
1639 if (MetaspaceShared::use_windows_memory_mapping()) {
1640 // We have now reserved address space for the archives, and will map in
1641 // the archive files into this space.
1642 //
1643 // Special handling for Windows: on Windows we cannot map a file view
1644 // into an existing memory mapping. So, we unmap the address range we
1645 // just reserved again, which will make it available for mapping the
1646 // archives.
1647 // Reserving this range has not been for naught however since it makes
1648 // us reasonably sure the address range is available.
1649 //
1650 // But still it may fail, since between unmapping the range and mapping
1651 // in the archive someone else may grab the address space. Therefore
1652 // there is a fallback in FileMap::map_region() where we just read in
1653 // the archive files sequentially instead of mapping it in. We couple
1654 // this with use_requested_addr, since we're going to patch all the
1655 // pointers anyway so there's no benefit to mmap.
1656 if (use_requested_addr) {
1657 assert(!total_space_rs.is_reserved(), "Should not be reserved for Windows");
1658 log_info(cds)("Windows mmap workaround: releasing archive space.");
1659 MemoryReserver::release(archive_space_rs);
1660 // Mark as not reserved
1661 archive_space_rs = {};
1662 // The protection zone is part of the archive:
1663 // See comment above, the Windows way of loading CDS is to mmap the individual
1664 // parts of the archive into the address region we just vacated. The protection
1665 // zone will not be mapped (and, in fact, does not exist as physical region in
1666 // the archive). Therefore, after removing the archive space above, we must
1667 // re-reserve the protection zone part lest something else gets mapped into that
1668 // area later.
1669 if (prot_zone_size > 0) {
1670 assert(prot_zone_size >= os::vm_allocation_granularity(), "must be"); // not just page size!
1671 char* p = os::attempt_reserve_memory_at(mapped_base_address, prot_zone_size,
1672 false, MemTag::mtClassShared);
1673 assert(p == mapped_base_address || p == nullptr, "must be");
1674 if (p == nullptr) {
1675 log_debug(cds)("Failed to re-reserve protection zone");
1676 return MAP_ARCHIVE_MMAP_FAILURE;
1677 }
1678 }
1679 }
1680 }
1681
1682 if (prot_zone_size > 0) {
1683 os::commit_memory(mapped_base_address, prot_zone_size, false); // will later be protected
1684 // Before mapping the core regions into the newly established address space, we mark
1685 // start and the end of the future protection zone with canaries. That way we easily
1686 // catch mapping errors (accidentally mapping data into the future protection zone).
1687 *(mapped_base_address) = 'P';
1688 *(mapped_base_address + prot_zone_size - 1) = 'P';
1689 }
1690
1691 MapArchiveResult static_result = map_archive(static_mapinfo, mapped_base_address, archive_space_rs);
1692 MapArchiveResult dynamic_result = (static_result == MAP_ARCHIVE_SUCCESS) ?
1693 map_archive(dynamic_mapinfo, mapped_base_address, archive_space_rs) : MAP_ARCHIVE_OTHER_FAILURE;
1694
1695 DEBUG_ONLY(if (ArchiveRelocationMode == 1 && use_requested_addr) {
1696 // This is for simulating mmap failures at the requested address. In
1697 // debug builds, we do it here (after all archives have possibly been
1698 // mapped), so we can thoroughly test the code for failure handling
1699 // (releasing all allocated resource, etc).
1700 log_info(cds)("ArchiveRelocationMode == 1: always map archive(s) at an alternative address");
1701 if (static_result == MAP_ARCHIVE_SUCCESS) {
1702 static_result = MAP_ARCHIVE_MMAP_FAILURE;
1703 }
1704 if (dynamic_result == MAP_ARCHIVE_SUCCESS) {
1705 dynamic_result = MAP_ARCHIVE_MMAP_FAILURE;
1706 }
1707 });
1708
1709 if (static_result == MAP_ARCHIVE_SUCCESS) {
1710 if (dynamic_result == MAP_ARCHIVE_SUCCESS) {
1711 result = MAP_ARCHIVE_SUCCESS;
1712 } else if (dynamic_result == MAP_ARCHIVE_OTHER_FAILURE) {
1713 assert(dynamic_mapinfo != nullptr && !dynamic_mapinfo->is_mapped(), "must have failed");
1714 // No need to retry mapping the dynamic archive again, as it will never succeed
1715 // (bad file, etc) -- just keep the base archive.
1716 log_warning(cds, dynamic)("Unable to use shared archive. The top archive failed to load: %s",
1717 dynamic_mapinfo->full_path());
1718 result = MAP_ARCHIVE_SUCCESS;
1719 // TODO, we can give the unused space for the dynamic archive to class_space_rs, but there's no
1720 // easy API to do that right now.
1721 } else {
1722 result = MAP_ARCHIVE_MMAP_FAILURE;
1723 }
1724 } else if (static_result == MAP_ARCHIVE_OTHER_FAILURE) {
1725 result = MAP_ARCHIVE_OTHER_FAILURE;
1726 } else {
1727 result = MAP_ARCHIVE_MMAP_FAILURE;
1728 }
1729 }
1730
1731 if (result == MAP_ARCHIVE_SUCCESS) {
1732 SharedBaseAddress = (size_t)mapped_base_address;
1733 #ifdef _LP64
1734 if (Metaspace::using_class_space()) {
1735 assert(prot_zone_size > 0 &&
1736 *(mapped_base_address) == 'P' &&
1737 *(mapped_base_address + prot_zone_size - 1) == 'P',
1738 "Protection zone was overwritten?");
1739 // Set up ccs in metaspace.
1740 Metaspace::initialize_class_space(class_space_rs);
1741
1742 // Set up compressed Klass pointer encoding: the encoding range must
1743 // cover both archive and class space.
1744 const address encoding_base = (address)mapped_base_address;
1745 const address klass_range_start = encoding_base + prot_zone_size;
1746 const size_t klass_range_size = (address)class_space_rs.end() - klass_range_start;
1747 if (INCLUDE_CDS_JAVA_HEAP || UseCompactObjectHeaders) {
1748 // The CDS archive may contain narrow Klass IDs that were precomputed at archive generation time:
1749 // - every archived java object header (only if INCLUDE_CDS_JAVA_HEAP)
1750 // - every archived Klass' prototype (only if +UseCompactObjectHeaders)
1751 //
1752 // In order for those IDs to still be valid, we need to dictate base and shift: base should be the
1753 // mapping start (including protection zone), shift should be the shift used at archive generation time.
1754 CompressedKlassPointers::initialize_for_given_encoding(
1755 klass_range_start, klass_range_size,
1756 encoding_base, ArchiveBuilder::precomputed_narrow_klass_shift() // precomputed encoding, see ArchiveBuilder
1757 );
1758 } else {
1759 // Let JVM freely choose encoding base and shift
1760 CompressedKlassPointers::initialize(klass_range_start, klass_range_size);
1761 }
1762 CompressedKlassPointers::establish_protection_zone(encoding_base, prot_zone_size);
1763
1764 // map_or_load_heap_region() compares the current narrow oop and klass encodings
1765 // with the archived ones, so it must be done after all encodings are determined.
1766 static_mapinfo->map_or_load_heap_region();
1767 }
1768 #endif // _LP64
1769 log_info(cds)("initial optimized module handling: %s", CDSConfig::is_using_optimized_module_handling() ? "enabled" : "disabled");
1770 log_info(cds)("initial full module graph: %s", CDSConfig::is_using_full_module_graph() ? "enabled" : "disabled");
1771 } else {
1772 unmap_archive(static_mapinfo);
1773 unmap_archive(dynamic_mapinfo);
1774 release_reserved_spaces(total_space_rs, archive_space_rs, class_space_rs);
1775 }
1776
1777 return result;
1778 }
1779
1780
1781 // This will reserve two address spaces suitable to house Klass structures, one
1782 // for the cds archives (static archive and optionally dynamic archive) and
1783 // optionally one move for ccs.
1784 //
1785 // Since both spaces must fall within the compressed class pointer encoding
1786 // range, they are allocated close to each other.
1787 //
1788 // Space for archives will be reserved first, followed by a potential gap,
1789 // followed by the space for ccs:
1790 //
1791 // +-- Base address A B End
1792 // | | | |
1793 // v v v v
1794 // +-------------+--------------+ +----------------------+
1795 // | static arc | [dyn. arch] | [gap] | compr. class space |
1796 // +-------------+--------------+ +----------------------+
1797 //
1798 // (The gap may result from different alignment requirements between metaspace
1799 // and CDS)
1800 //
1801 // If UseCompressedClassPointers is disabled, only one address space will be
1802 // reserved:
1803 //
1804 // +-- Base address End
1805 // | |
1806 // v v
1807 // +-------------+--------------+
1808 // | static arc | [dyn. arch] |
1809 // +-------------+--------------+
1810 //
1811 // Base address: If use_archive_base_addr address is true, the Base address is
1812 // determined by the address stored in the static archive. If
1813 // use_archive_base_addr address is false, this base address is determined
1814 // by the platform.
1815 //
1816 // If UseCompressedClassPointers=1, the range encompassing both spaces will be
1817 // suitable to en/decode narrow Klass pointers: the base will be valid for
1818 // encoding, the range [Base, End) and not surpass the max. range for that encoding.
1819 //
1820 // Return:
1821 //
1822 // - On success:
1823 // - total_space_rs will be reserved as whole for archive_space_rs and
1824 // class_space_rs if UseCompressedClassPointers is true.
1825 // On Windows, try reserve archive_space_rs and class_space_rs
1826 // separately first if use_archive_base_addr is true.
1827 // - archive_space_rs will be reserved and large enough to host static and
1828 // if needed dynamic archive: [Base, A).
1829 // archive_space_rs.base and size will be aligned to CDS reserve
1830 // granularity.
1831 // - class_space_rs: If UseCompressedClassPointers=1, class_space_rs will
1832 // be reserved. Its start address will be aligned to metaspace reserve
1833 // alignment, which may differ from CDS alignment. It will follow the cds
1834 // archive space, close enough such that narrow class pointer encoding
1835 // covers both spaces.
1836 // If UseCompressedClassPointers=0, class_space_rs remains unreserved.
1837 // - On error: null is returned and the spaces remain unreserved.
1838 char* MetaspaceShared::reserve_address_space_for_archives(FileMapInfo* static_mapinfo,
1839 FileMapInfo* dynamic_mapinfo,
1840 bool use_archive_base_addr,
1841 ReservedSpace& total_space_rs,
1842 ReservedSpace& archive_space_rs,
1843 ReservedSpace& class_space_rs) {
1844
1845 address const base_address = (address) (use_archive_base_addr ? static_mapinfo->requested_base_address() : nullptr);
1846 const size_t archive_space_alignment = core_region_alignment();
1847
1848 // Size and requested location of the archive_space_rs (for both static and dynamic archives)
1849 size_t archive_end_offset = (dynamic_mapinfo == nullptr) ? static_mapinfo->mapping_end_offset() : dynamic_mapinfo->mapping_end_offset();
1850 size_t archive_space_size = align_up(archive_end_offset, archive_space_alignment);
1851
1852 if (!Metaspace::using_class_space()) {
1853 // Get the simple case out of the way first:
1854 // no compressed class space, simple allocation.
1855
1856 // When running without class space, requested archive base should be aligned to cds core alignment.
1857 assert(is_aligned(base_address, archive_space_alignment),
1858 "Archive base address unaligned: " PTR_FORMAT ", needs alignment: %zu.",
1859 p2i(base_address), archive_space_alignment);
1860
1861 archive_space_rs = MemoryReserver::reserve((char*)base_address,
1862 archive_space_size,
1863 archive_space_alignment,
1864 os::vm_page_size());
1865 if (archive_space_rs.is_reserved()) {
1866 assert(base_address == nullptr ||
1867 (address)archive_space_rs.base() == base_address, "Sanity");
1868 // Register archive space with NMT.
1869 MemTracker::record_virtual_memory_tag(archive_space_rs, mtClassShared);
1870 return archive_space_rs.base();
1871 }
1872 return nullptr;
1873 }
1874
1875 #ifdef _LP64
1876
1877 // Complex case: two spaces adjacent to each other, both to be addressable
1878 // with narrow class pointers.
1879 // We reserve the whole range spanning both spaces, then split that range up.
1880
1881 const size_t class_space_alignment = Metaspace::reserve_alignment();
1882
1883 // When running with class space, requested archive base must satisfy both cds core alignment
1884 // and class space alignment.
1885 const size_t base_address_alignment = MAX2(class_space_alignment, archive_space_alignment);
1886 assert(is_aligned(base_address, base_address_alignment),
1887 "Archive base address unaligned: " PTR_FORMAT ", needs alignment: %zu.",
1888 p2i(base_address), base_address_alignment);
1889
1890 size_t class_space_size = CompressedClassSpaceSize;
1891 assert(CompressedClassSpaceSize > 0 &&
1892 is_aligned(CompressedClassSpaceSize, class_space_alignment),
1893 "CompressedClassSpaceSize malformed: %zu", CompressedClassSpaceSize);
1894
1895 const size_t ccs_begin_offset = align_up(archive_space_size, class_space_alignment);
1896 const size_t gap_size = ccs_begin_offset - archive_space_size;
1897
1898 // Reduce class space size if it would not fit into the Klass encoding range
1899 constexpr size_t max_encoding_range_size = 4 * G;
1900 guarantee(archive_space_size < max_encoding_range_size - class_space_alignment, "Archive too large");
1901 if ((archive_space_size + gap_size + class_space_size) > max_encoding_range_size) {
1902 class_space_size = align_down(max_encoding_range_size - archive_space_size - gap_size, class_space_alignment);
1903 log_info(metaspace)("CDS initialization: reducing class space size from %zu to %zu",
1904 CompressedClassSpaceSize, class_space_size);
1905 FLAG_SET_ERGO(CompressedClassSpaceSize, class_space_size);
1906 }
1907
1908 const size_t total_range_size =
1909 archive_space_size + gap_size + class_space_size;
1910
1911 // Test that class space base address plus shift can be decoded by aarch64, when restored.
1912 const int precomputed_narrow_klass_shift = ArchiveBuilder::precomputed_narrow_klass_shift();
1913 if (!CompressedKlassPointers::check_klass_decode_mode(base_address, precomputed_narrow_klass_shift,
1914 total_range_size)) {
1915 log_info(cds)("CDS initialization: Cannot use SharedBaseAddress " PTR_FORMAT " with precomputed shift %d.",
1916 p2i(base_address), precomputed_narrow_klass_shift);
1917 use_archive_base_addr = false;
1918 }
1919
1920 assert(total_range_size > ccs_begin_offset, "must be");
1921 if (use_windows_memory_mapping() && use_archive_base_addr) {
1922 if (base_address != nullptr) {
1923 // On Windows, we cannot safely split a reserved memory space into two (see JDK-8255917).
1924 // Hence, we optimistically reserve archive space and class space side-by-side. We only
1925 // do this for use_archive_base_addr=true since for use_archive_base_addr=false case
1926 // caller will not split the combined space for mapping, instead read the archive data
1927 // via sequential file IO.
1928 address ccs_base = base_address + archive_space_size + gap_size;
1929 archive_space_rs = MemoryReserver::reserve((char*)base_address,
1930 archive_space_size,
1931 archive_space_alignment,
1932 os::vm_page_size());
1933 class_space_rs = MemoryReserver::reserve((char*)ccs_base,
1934 class_space_size,
1935 class_space_alignment,
1936 os::vm_page_size());
1937 }
1938 if (!archive_space_rs.is_reserved() || !class_space_rs.is_reserved()) {
1939 release_reserved_spaces(total_space_rs, archive_space_rs, class_space_rs);
1940 return nullptr;
1941 }
1942 MemTracker::record_virtual_memory_tag(archive_space_rs, mtClassShared);
1943 MemTracker::record_virtual_memory_tag(class_space_rs, mtClass);
1944 } else {
1945 if (use_archive_base_addr && base_address != nullptr) {
1946 total_space_rs = MemoryReserver::reserve((char*) base_address,
1947 total_range_size,
1948 base_address_alignment,
1949 os::vm_page_size());
1950 } else {
1951 // We did not manage to reserve at the preferred address, or were instructed to relocate. In that
1952 // case we reserve wherever possible, but the start address needs to be encodable as narrow Klass
1953 // encoding base since the archived heap objects contain narrow Klass IDs pre-calculated toward the start
1954 // of the shared Metaspace. That prevents us from using zero-based encoding and therefore we won't
1955 // try allocating in low-address regions.
1956 total_space_rs = Metaspace::reserve_address_space_for_compressed_classes(total_range_size, false /* optimize_for_zero_base */);
1957 }
1958
1959 if (!total_space_rs.is_reserved()) {
1960 return nullptr;
1961 }
1962
1963 // Paranoid checks:
1964 assert(!use_archive_base_addr || (address)total_space_rs.base() == base_address,
1965 "Sanity (" PTR_FORMAT " vs " PTR_FORMAT ")", p2i(base_address), p2i(total_space_rs.base()));
1966 assert(is_aligned(total_space_rs.base(), base_address_alignment), "Sanity");
1967 assert(total_space_rs.size() == total_range_size, "Sanity");
1968
1969 // Now split up the space into ccs and cds archive. For simplicity, just leave
1970 // the gap reserved at the end of the archive space. Do not do real splitting.
1971 archive_space_rs = total_space_rs.first_part(ccs_begin_offset,
1972 (size_t)archive_space_alignment);
1973 class_space_rs = total_space_rs.last_part(ccs_begin_offset);
1974 MemTracker::record_virtual_memory_split_reserved(total_space_rs.base(), total_space_rs.size(),
1975 ccs_begin_offset, mtClassShared, mtClass);
1976 }
1977 assert(is_aligned(archive_space_rs.base(), archive_space_alignment), "Sanity");
1978 assert(is_aligned(archive_space_rs.size(), archive_space_alignment), "Sanity");
1979 assert(is_aligned(class_space_rs.base(), class_space_alignment), "Sanity");
1980 assert(is_aligned(class_space_rs.size(), class_space_alignment), "Sanity");
1981
1982
1983 return archive_space_rs.base();
1984
1985 #else
1986 ShouldNotReachHere();
1987 return nullptr;
1988 #endif
1989
1990 }
1991
1992 void MetaspaceShared::release_reserved_spaces(ReservedSpace& total_space_rs,
1993 ReservedSpace& archive_space_rs,
1994 ReservedSpace& class_space_rs) {
1995 if (total_space_rs.is_reserved()) {
1996 log_debug(cds)("Released shared space (archive + class) " INTPTR_FORMAT, p2i(total_space_rs.base()));
1997 MemoryReserver::release(total_space_rs);
1998 total_space_rs = {};
1999 } else {
2000 if (archive_space_rs.is_reserved()) {
2001 log_debug(cds)("Released shared space (archive) " INTPTR_FORMAT, p2i(archive_space_rs.base()));
2002 MemoryReserver::release(archive_space_rs);
2003 archive_space_rs = {};
2004 }
2005 if (class_space_rs.is_reserved()) {
2006 log_debug(cds)("Released shared space (classes) " INTPTR_FORMAT, p2i(class_space_rs.base()));
2007 MemoryReserver::release(class_space_rs);
2008 class_space_rs = {};
2009 }
2010 }
2011 }
2012
2013 static int archive_regions[] = { MetaspaceShared::rw, MetaspaceShared::ro };
2014 static int archive_regions_count = 2;
2015
2016 MapArchiveResult MetaspaceShared::map_archive(FileMapInfo* mapinfo, char* mapped_base_address, ReservedSpace rs) {
2017 assert(CDSConfig::is_using_archive(), "must be runtime");
2018 if (mapinfo == nullptr) {
2019 return MAP_ARCHIVE_SUCCESS; // The dynamic archive has not been specified. No error has happened -- trivially succeeded.
2020 }
2021
2022 if (!mapinfo->validate_aot_class_linking()) {
2023 return MAP_ARCHIVE_OTHER_FAILURE;
2024 }
2025
2026 mapinfo->set_is_mapped(false);
2027 if (mapinfo->core_region_alignment() != (size_t)core_region_alignment()) {
2028 log_info(cds)("Unable to map CDS archive -- core_region_alignment() expected: %zu"
2029 " actual: %zu", mapinfo->core_region_alignment(), core_region_alignment());
2030 return MAP_ARCHIVE_OTHER_FAILURE;
2031 }
2032
2033 MapArchiveResult result =
2034 mapinfo->map_regions(archive_regions, archive_regions_count, mapped_base_address, rs);
2035
2036 if (result != MAP_ARCHIVE_SUCCESS) {
2037 unmap_archive(mapinfo);
2038 return result;
2039 }
2040
2041 if (!mapinfo->validate_class_location()) {
2042 unmap_archive(mapinfo);
2043 return MAP_ARCHIVE_OTHER_FAILURE;
2044 }
2045
2046 if (mapinfo->is_static()) {
2047 // Currently, only static archive uses early serialized data.
2048 char* buffer = mapinfo->early_serialized_data();
2049 intptr_t* array = (intptr_t*)buffer;
2050 ReadClosure rc(&array, (intptr_t)mapped_base_address);
2051 early_serialize(&rc);
2052 }
2053
2054 if (!mapinfo->validate_aot_class_linking()) {
2055 unmap_archive(mapinfo);
2056 return MAP_ARCHIVE_OTHER_FAILURE;
2057 }
2058
2059 mapinfo->set_is_mapped(true);
2060 return MAP_ARCHIVE_SUCCESS;
2061 }
2062
2063 void MetaspaceShared::unmap_archive(FileMapInfo* mapinfo) {
2064 assert(CDSConfig::is_using_archive(), "must be runtime");
2065 if (mapinfo != nullptr) {
2066 mapinfo->unmap_regions(archive_regions, archive_regions_count);
2067 mapinfo->unmap_region(MetaspaceShared::bm);
2068 mapinfo->set_is_mapped(false);
2069 }
2070 }
2071
2072 // For -XX:PrintSharedArchiveAndExit
2073 class CountSharedSymbols : public SymbolClosure {
2074 private:
2075 int _count;
2076 public:
2077 CountSharedSymbols() : _count(0) {}
2078 void do_symbol(Symbol** sym) {
2079 _count++;
2080 }
2081 int total() { return _count; }
2082
2083 };
2084
2085 // Read the miscellaneous data from the shared file, and
2086 // serialize it out to its various destinations.
2087
2088 void MetaspaceShared::initialize_shared_spaces() {
2089 FileMapInfo *static_mapinfo = FileMapInfo::current_info();
2090
2091 // Verify various attributes of the archive, plus initialize the
2092 // shared string/symbol tables.
2093 char* buffer = static_mapinfo->serialized_data();
2094 intptr_t* array = (intptr_t*)buffer;
2095 ReadClosure rc(&array, (intptr_t)SharedBaseAddress);
2096 serialize(&rc);
2097
2098 // Finish up archived heap initialization. These must be
2099 // done after ReadClosure.
2100 static_mapinfo->patch_heap_embedded_pointers();
2101 ArchiveHeapLoader::finish_initialization();
2102 Universe::load_archived_object_instances();
2103 SCCache::initialize();
2104
2105 // Close the mapinfo file
2106 static_mapinfo->close();
2107
2108 static_mapinfo->unmap_region(MetaspaceShared::bm);
2109
2110 FileMapInfo *dynamic_mapinfo = FileMapInfo::dynamic_info();
2111 if (dynamic_mapinfo != nullptr) {
2112 intptr_t* buffer = (intptr_t*)dynamic_mapinfo->serialized_data();
2113 ReadClosure rc(&buffer, (intptr_t)SharedBaseAddress);
2114 ArchiveBuilder::serialize_dynamic_archivable_items(&rc);
2115 DynamicArchive::setup_array_klasses();
2116 dynamic_mapinfo->close();
2117 dynamic_mapinfo->unmap_region(MetaspaceShared::bm);
2118 }
2119
2120 LogStreamHandle(Info, cds) lsh;
2121 if (lsh.is_enabled()) {
2122 lsh.print("Using AOT-linked classes: %s (static archive: %s aot-linked classes",
2123 BOOL_TO_STR(CDSConfig::is_using_aot_linked_classes()),
2124 static_mapinfo->header()->has_aot_linked_classes() ? "has" : "no");
2125 if (dynamic_mapinfo != nullptr) {
2126 lsh.print(", dynamic archive: %s aot-linked classes",
2127 dynamic_mapinfo->header()->has_aot_linked_classes() ? "has" : "no");
2128 }
2129 lsh.print_cr(")");
2130 }
2131
2132 // Set up LambdaFormInvokers::_lambdaform_lines for dynamic dump
2133 if (CDSConfig::is_dumping_dynamic_archive()) {
2134 // Read stored LF format lines stored in static archive
2135 LambdaFormInvokers::read_static_archive_invokers();
2136 }
2137
2138 if (PrintSharedArchiveAndExit) {
2139 // Print archive names
2140 if (dynamic_mapinfo != nullptr) {
2141 tty->print_cr("\n\nBase archive name: %s", CDSConfig::input_static_archive_path());
2142 tty->print_cr("Base archive version %d", static_mapinfo->version());
2143 } else {
2144 tty->print_cr("Static archive name: %s", static_mapinfo->full_path());
2145 tty->print_cr("Static archive version %d", static_mapinfo->version());
2146 }
2147
2148 SystemDictionaryShared::print_shared_archive(tty);
2149 if (dynamic_mapinfo != nullptr) {
2150 tty->print_cr("\n\nDynamic archive name: %s", dynamic_mapinfo->full_path());
2151 tty->print_cr("Dynamic archive version %d", dynamic_mapinfo->version());
2152 SystemDictionaryShared::print_shared_archive(tty, false/*dynamic*/);
2153 }
2154 TrainingData::print_archived_training_data_on(tty);
2155
2156 if (LoadCachedCode) {
2157 tty->print_cr("\n\nCached Code");
2158 SCCache::print_on(tty);
2159 }
2160
2161 // collect shared symbols and strings
2162 CountSharedSymbols cl;
2163 SymbolTable::shared_symbols_do(&cl);
2164 tty->print_cr("Number of shared symbols: %d", cl.total());
2165 tty->print_cr("Number of shared strings: %zu", StringTable::shared_entry_count());
2166 tty->print_cr("VM version: %s\r\n", static_mapinfo->vm_version());
2167 if (FileMapInfo::current_info() == nullptr || _archive_loading_failed) {
2168 tty->print_cr("archive is invalid");
2169 vm_exit(1);
2170 } else {
2171 tty->print_cr("archive is valid");
2172 vm_exit(0);
2173 }
2174 }
2175 }
2176
2177 // JVM/TI RedefineClasses() support:
2178 bool MetaspaceShared::remap_shared_readonly_as_readwrite() {
2179 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
2180
2181 if (CDSConfig::is_using_archive()) {
2182 // remap the shared readonly space to shared readwrite, private
2183 FileMapInfo* mapinfo = FileMapInfo::current_info();
2184 if (!mapinfo->remap_shared_readonly_as_readwrite()) {
2185 return false;
2186 }
2187 if (FileMapInfo::dynamic_info() != nullptr) {
2188 mapinfo = FileMapInfo::dynamic_info();
2189 if (!mapinfo->remap_shared_readonly_as_readwrite()) {
2190 return false;
2191 }
2192 }
2193 _remapped_readwrite = true;
2194 }
2195 return true;
2196 }
2197
2198 void MetaspaceShared::print_on(outputStream* st) {
2199 if (CDSConfig::is_using_archive()) {
2200 st->print("CDS archive(s) mapped at: ");
2201 address base = (address)MetaspaceObj::shared_metaspace_base();
2202 address static_top = (address)_shared_metaspace_static_top;
2203 address top = (address)MetaspaceObj::shared_metaspace_top();
2204 st->print("[" PTR_FORMAT "-" PTR_FORMAT "-" PTR_FORMAT "), ", p2i(base), p2i(static_top), p2i(top));
2205 st->print("size %zu, ", top - base);
2206 st->print("SharedBaseAddress: " PTR_FORMAT ", ArchiveRelocationMode: %d.", SharedBaseAddress, ArchiveRelocationMode);
2207 } else {
2208 st->print("CDS archive(s) not mapped");
2209 }
2210 st->cr();
2211 }