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/aotArtifactFinder.hpp"
26 #include "cds/aotClassInitializer.hpp"
27 #include "cds/aotClassLinker.hpp"
28 #include "cds/aotClassLocation.hpp"
29 #include "cds/aotConstantPoolResolver.hpp"
30 #include "cds/aotLinkedClassBulkLoader.hpp"
31 #include "cds/aotLogging.hpp"
32 #include "cds/aotMapLogger.hpp"
33 #include "cds/aotMetaspace.hpp"
34 #include "cds/aotReferenceObjSupport.hpp"
35 #include "cds/archiveBuilder.hpp"
36 #include "cds/archiveHeapLoader.hpp"
37 #include "cds/archiveHeapWriter.hpp"
38 #include "cds/cds_globals.hpp"
39 #include "cds/cdsConfig.hpp"
40 #include "cds/cdsProtectionDomain.hpp"
41 #include "cds/classListParser.hpp"
42 #include "cds/classListWriter.hpp"
43 #include "cds/cppVtables.hpp"
44 #include "cds/dumpAllocStats.hpp"
45 #include "cds/dynamicArchive.hpp"
46 #include "cds/filemap.hpp"
47 #include "cds/finalImageRecipes.hpp"
48 #include "cds/heapShared.hpp"
49 #include "cds/lambdaFormInvokers.hpp"
50 #include "cds/lambdaProxyClassDictionary.hpp"
51 #include "classfile/classLoaderDataGraph.hpp"
52 #include "classfile/classLoaderDataShared.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/aotCodeCache.hpp"
64 #include "code/codeCache.hpp"
65 #include "gc/shared/gcVMOperations.hpp"
66 #include "interpreter/bytecodes.hpp"
67 #include "interpreter/bytecodeStream.hpp"
68 #include "jvm_io.h"
69 #include "logging/log.hpp"
70 #include "logging/logMessage.hpp"
71 #include "logging/logStream.hpp"
72 #include "memory/memoryReserver.hpp"
73 #include "memory/metaspace.hpp"
74 #include "memory/metaspaceClosure.hpp"
75 #include "memory/oopFactory.hpp"
76 #include "memory/resourceArea.hpp"
77 #include "memory/universe.hpp"
78 #include "nmt/memTracker.hpp"
79 #include "oops/compressedKlass.hpp"
80 #include "oops/constantPool.inline.hpp"
81 #include "oops/instanceMirrorKlass.hpp"
82 #include "oops/klass.inline.hpp"
83 #include "oops/objArrayOop.hpp"
84 #include "oops/oop.inline.hpp"
85 #include "oops/oopHandle.hpp"
86 #include "oops/resolvedFieldEntry.hpp"
87 #include "oops/trainingData.hpp"
88 #include "prims/jvmtiExport.hpp"
89 #include "runtime/arguments.hpp"
90 #include "runtime/globals.hpp"
91 #include "runtime/globals_extension.hpp"
92 #include "runtime/handles.inline.hpp"
93 #include "runtime/javaCalls.hpp"
94 #include "runtime/os.inline.hpp"
95 #include "runtime/safepointVerifiers.hpp"
96 #include "runtime/sharedRuntime.hpp"
97 #include "runtime/vmOperations.hpp"
98 #include "runtime/vmThread.hpp"
99 #include "sanitizers/leak.hpp"
100 #include "utilities/align.hpp"
101 #include "utilities/bitMap.inline.hpp"
102 #include "utilities/defaultStream.hpp"
103 #include "utilities/hashTable.hpp"
104 #include "utilities/macros.hpp"
105 #include "utilities/ostream.hpp"
106
107 #include <sys/stat.h>
108
109 ReservedSpace AOTMetaspace::_symbol_rs;
110 VirtualSpace AOTMetaspace::_symbol_vs;
111 bool AOTMetaspace::_archive_loading_failed = false;
112 bool AOTMetaspace::_remapped_readwrite = false;
113 void* AOTMetaspace::_aot_metaspace_static_top = nullptr;
114 intx AOTMetaspace::_relocation_delta;
115 char* AOTMetaspace::_requested_base_address;
116 Array<Method*>* AOTMetaspace::_archived_method_handle_intrinsics = nullptr;
117 bool AOTMetaspace::_use_optimized_module_handling = true;
118
119 // The CDS archive is divided into the following regions:
120 // rw - read-write metadata
121 // ro - read-only metadata and read-only tables
122 // hp - heap region
123 // bm - bitmap for relocating the above 7 regions.
124 //
125 // The rw and ro regions are linearly allocated, in the order of rw->ro.
126 // These regions are aligned with AOTMetaspace::core_region_alignment().
127 //
128 // These 2 regions are populated in the following steps:
129 // [0] All classes are loaded in AOTMetaspace::load_classes(). All metadata are
130 // temporarily allocated outside of the shared regions.
131 // [1] We enter a safepoint and allocate a buffer for the rw/ro regions.
132 // [2] C++ vtables are copied into the rw region.
133 // [3] ArchiveBuilder copies RW metadata into the rw region.
134 // [4] ArchiveBuilder copies RO metadata into the ro region.
135 // [5] SymbolTable, StringTable, SystemDictionary, and a few other read-only data
136 // are copied into the ro region as read-only tables.
137 //
138 // The heap region is written by HeapShared::write_heap().
139 //
140 // The bitmap region is used to relocate the ro/rw/hp regions.
141
142 static DumpRegion _symbol_region("symbols");
143
144 char* AOTMetaspace::symbol_space_alloc(size_t num_bytes) {
145 return _symbol_region.allocate(num_bytes);
146 }
147
148 // os::vm_allocation_granularity() is usually 4K for most OSes. However, some platforms
149 // such as linux-aarch64 and macos-x64 ...
150 // it can be either 4K or 64K and on macos-aarch64 it is 16K. To generate archives that are
151 // compatible for both settings, an alternative cds core region alignment can be enabled
152 // at building time:
153 // --enable-compactible-cds-alignment
154 // Upon successful configuration, the compactible alignment then can be defined in:
155 // os_linux_aarch64.cpp
156 // os_bsd_x86.cpp
157 size_t AOTMetaspace::core_region_alignment() {
158 return os::cds_core_region_alignment();
159 }
160
161 size_t AOTMetaspace::protection_zone_size() {
162 return os::cds_core_region_alignment();
163 }
164
165 static bool shared_base_valid(char* shared_base) {
166 // We check user input for SharedBaseAddress at dump time.
167
168 // At CDS runtime, "shared_base" will be the (attempted) mapping start. It will also
169 // be the encoding base, since the headers of archived base objects (and with Lilliput,
170 // the prototype mark words) carry pre-computed narrow Klass IDs that refer to the mapping
171 // start as base.
172 //
173 // On AARCH64, The "shared_base" may not be later usable as encoding base, depending on the
174 // total size of the reserved area and the precomputed_narrow_klass_shift. This is checked
175 // before reserving memory. Here we weed out values already known to be invalid later.
176 return AARCH64_ONLY(is_aligned(shared_base, 4 * G)) NOT_AARCH64(true);
177 }
178
179 class DumpClassListCLDClosure : public CLDClosure {
180 static const int INITIAL_TABLE_SIZE = 1987;
181 static const int MAX_TABLE_SIZE = 61333;
182
183 fileStream *_stream;
184 ResizeableHashTable<InstanceKlass*, bool,
185 AnyObj::C_HEAP, mtClassShared> _dumped_classes;
186
187 void dump(InstanceKlass* ik) {
188 bool created;
189 _dumped_classes.put_if_absent(ik, &created);
190 if (!created) {
191 return;
192 }
193 if (_dumped_classes.maybe_grow()) {
194 log_info(aot, hashtables)("Expanded _dumped_classes table to %d", _dumped_classes.table_size());
195 }
196 if (ik->super()) {
197 dump(ik->super());
198 }
199 Array<InstanceKlass*>* interfaces = ik->local_interfaces();
200 int len = interfaces->length();
201 for (int i = 0; i < len; i++) {
202 dump(interfaces->at(i));
203 }
204 ClassListWriter::write_to_stream(ik, _stream);
205 }
206
207 public:
208 DumpClassListCLDClosure(fileStream* f)
209 : CLDClosure(), _dumped_classes(INITIAL_TABLE_SIZE, MAX_TABLE_SIZE) {
210 _stream = f;
211 }
212
213 void do_cld(ClassLoaderData* cld) {
214 for (Klass* klass = cld->klasses(); klass != nullptr; klass = klass->next_link()) {
215 if (klass->is_instance_klass()) {
216 dump(InstanceKlass::cast(klass));
217 }
218 }
219 }
220 };
221
222 void AOTMetaspace::dump_loaded_classes(const char* file_name, TRAPS) {
223 fileStream stream(file_name, "w");
224 if (stream.is_open()) {
225 MutexLocker lock(ClassLoaderDataGraph_lock);
226 MutexLocker lock2(ClassListFile_lock, Mutex::_no_safepoint_check_flag);
227 DumpClassListCLDClosure collect_classes(&stream);
228 ClassLoaderDataGraph::loaded_cld_do(&collect_classes);
229 } else {
230 THROW_MSG(vmSymbols::java_io_IOException(), "Failed to open file");
231 }
232 }
233
234 static bool shared_base_too_high(char* specified_base, char* aligned_base, size_t cds_max) {
235 // Caller should have checked that aligned_base was successfully aligned and is not nullptr.
236 // Comparing specified_base with nullptr is UB.
237 assert(aligned_base != nullptr, "sanity");
238 assert(aligned_base >= specified_base, "sanity");
239
240 if (max_uintx - uintx(aligned_base) < uintx(cds_max)) {
241 // Not enough address space to hold an archive of cds_max bytes from aligned_base.
242 return true;
243 } else {
244 return false;
245 }
246 }
247
248 static char* compute_shared_base(size_t cds_max) {
249 char* specified_base = (char*)SharedBaseAddress;
250 size_t alignment = AOTMetaspace::core_region_alignment();
251 if (UseCompressedClassPointers && CompressedKlassPointers::needs_class_space()) {
252 alignment = MAX2(alignment, Metaspace::reserve_alignment());
253 }
254
255 if (SharedBaseAddress == 0) {
256 // Special meaning of -XX:SharedBaseAddress=0 -> Always map archive at os-selected address.
257 return specified_base;
258 }
259
260 char* aligned_base = can_align_up(specified_base, alignment)
261 ? align_up(specified_base, alignment)
262 : nullptr;
263
264 if (aligned_base != specified_base) {
265 aot_log_info(aot)("SharedBaseAddress (" INTPTR_FORMAT ") aligned up to " INTPTR_FORMAT,
266 p2i(specified_base), p2i(aligned_base));
267 }
268
269 const char* err = nullptr;
270 if (aligned_base == nullptr) {
271 err = "too high";
272 } else if (shared_base_too_high(specified_base, aligned_base, cds_max)) {
273 err = "too high";
274 } else if (!shared_base_valid(aligned_base)) {
275 err = "invalid for this platform";
276 } else {
277 return aligned_base;
278 }
279
280 // Arguments::default_SharedBaseAddress() is hard-coded in cds_globals.hpp. It must be carefully
281 // picked that (a) the align_up() below will always return a valid value; (b) none of
282 // the following asserts will fail.
283 aot_log_warning(aot)("SharedBaseAddress (" INTPTR_FORMAT ") is %s. Reverted to " INTPTR_FORMAT,
284 p2i((void*)SharedBaseAddress), err,
285 p2i((void*)Arguments::default_SharedBaseAddress()));
286
287 specified_base = (char*)Arguments::default_SharedBaseAddress();
288 aligned_base = align_up(specified_base, alignment);
289
290 // Make sure the default value of SharedBaseAddress specified in globals.hpp is sane.
291 assert(!shared_base_too_high(specified_base, aligned_base, cds_max), "Sanity");
292 assert(shared_base_valid(aligned_base), "Sanity");
293 return aligned_base;
294 }
295
296 void AOTMetaspace::initialize_for_static_dump() {
297 assert(CDSConfig::is_dumping_static_archive(), "sanity");
298 aot_log_info(aot)("Core region alignment: %zu", core_region_alignment());
299 // The max allowed size for CDS archive. We use this to limit SharedBaseAddress
300 // to avoid address space wrap around.
301 size_t cds_max;
302 const size_t reserve_alignment = core_region_alignment();
303
304 #ifdef _LP64
305 const uint64_t UnscaledClassSpaceMax = (uint64_t(max_juint) + 1);
306 cds_max = align_down(UnscaledClassSpaceMax, reserve_alignment);
307 #else
308 // We don't support archives larger than 256MB on 32-bit due to limited
309 // virtual address space.
310 cds_max = align_down(256*M, reserve_alignment);
311 #endif
312
313 _requested_base_address = compute_shared_base(cds_max);
314 SharedBaseAddress = (size_t)_requested_base_address;
315
316 size_t symbol_rs_size = LP64_ONLY(3 * G) NOT_LP64(128 * M);
317 _symbol_rs = MemoryReserver::reserve(symbol_rs_size,
318 os::vm_allocation_granularity(),
319 os::vm_page_size(),
320 mtClassShared);
321 if (!_symbol_rs.is_reserved()) {
322 aot_log_error(aot)("Unable to reserve memory for symbols: %zu bytes.", symbol_rs_size);
323 AOTMetaspace::unrecoverable_writing_error();
324 }
325 _symbol_region.init(&_symbol_rs, &_symbol_vs);
326 }
327
328 // Called by universe_post_init()
329 void AOTMetaspace::post_initialize(TRAPS) {
330 if (CDSConfig::is_using_archive()) {
331 FileMapInfo *static_mapinfo = FileMapInfo::current_info();
332 FileMapInfo *dynamic_mapinfo = FileMapInfo::dynamic_info();
333
334 if (AOTMapLogger::is_logging_at_bootstrap()) {
335 // The map logging needs to be done here, as it requires some stubs on Windows,
336 // which are not generated until the end of init_globals().
337 AOTMapLogger::runtime_log(static_mapinfo, dynamic_mapinfo);
338 }
339
340 // Close any open file descriptors. However, mmap'ed pages will remain in memory.
341 static_mapinfo->close();
342 static_mapinfo->unmap_region(AOTMetaspace::bm);
343
344 if (dynamic_mapinfo != nullptr) {
345 dynamic_mapinfo->close();
346 dynamic_mapinfo->unmap_region(AOTMetaspace::bm);
347 }
348
349 int size = AOTClassLocationConfig::runtime()->length();
350 if (size > 0) {
351 CDSProtectionDomain::allocate_shared_data_arrays(size, CHECK);
352 }
353 }
354 }
355
356 // Extra java.lang.Strings to be added to the archive
357 static GrowableArrayCHeap<OopHandle, mtClassShared>* _extra_interned_strings = nullptr;
358 // Extra Symbols to be added to the archive
359 static GrowableArrayCHeap<Symbol*, mtClassShared>* _extra_symbols = nullptr;
360 // Methods managed by SystemDictionary::find_method_handle_intrinsic() to be added to the archive
361 static GrowableArray<Method*>* _pending_method_handle_intrinsics = nullptr;
362
363 void AOTMetaspace::read_extra_data(JavaThread* current, const char* filename) {
364 _extra_interned_strings = new GrowableArrayCHeap<OopHandle, mtClassShared>(10000);
365 _extra_symbols = new GrowableArrayCHeap<Symbol*, mtClassShared>(1000);
366
367 HashtableTextDump reader(filename);
368 reader.check_version("VERSION: 1.0");
369
370 while (reader.remain() > 0) {
371 int utf8_length;
372 int prefix_type = reader.scan_prefix(&utf8_length);
373 ResourceMark rm(current);
374 if (utf8_length == 0x7fffffff) {
375 // buf_len will overflown 32-bit value.
376 aot_log_error(aot)("string length too large: %d", utf8_length);
377 AOTMetaspace::unrecoverable_loading_error();
378 }
379 int buf_len = utf8_length+1;
380 char* utf8_buffer = NEW_RESOURCE_ARRAY(char, buf_len);
381 reader.get_utf8(utf8_buffer, utf8_length);
382 utf8_buffer[utf8_length] = '\0';
383
384 if (prefix_type == HashtableTextDump::SymbolPrefix) {
385 _extra_symbols->append(SymbolTable::new_permanent_symbol(utf8_buffer));
386 } else{
387 assert(prefix_type == HashtableTextDump::StringPrefix, "Sanity");
388 ExceptionMark em(current);
389 JavaThread* THREAD = current; // For exception macros.
390 oop str = StringTable::intern(utf8_buffer, THREAD);
391
392 if (HAS_PENDING_EXCEPTION) {
393 log_warning(aot, heap)("[line %d] extra interned string allocation failed; size too large: %d",
394 reader.last_line_no(), utf8_length);
395 CLEAR_PENDING_EXCEPTION;
396 } else {
397 #if INCLUDE_CDS_JAVA_HEAP
398 if (ArchiveHeapWriter::is_string_too_large_to_archive(str)) {
399 log_warning(aot, heap)("[line %d] extra interned string ignored; size too large: %d",
400 reader.last_line_no(), utf8_length);
401 continue;
402 }
403 // Make sure this string is included in the dumped interned string table.
404 assert(str != nullptr, "must succeed");
405 _extra_interned_strings->append(OopHandle(Universe::vm_global(), str));
406 #endif
407 }
408 }
409 }
410 }
411
412 void AOTMetaspace::make_method_handle_intrinsics_shareable() {
413 for (int i = 0; i < _pending_method_handle_intrinsics->length(); i++) {
414 Method* m = ArchiveBuilder::current()->get_buffered_addr(_pending_method_handle_intrinsics->at(i));
415 m->remove_unshareable_info();
416 // Each method has its own constant pool (which is distinct from m->method_holder()->constants());
417 m->constants()->remove_unshareable_info();
418 }
419 }
420
421 void AOTMetaspace::write_method_handle_intrinsics() {
422 int len = _pending_method_handle_intrinsics->length();
423 _archived_method_handle_intrinsics = ArchiveBuilder::new_ro_array<Method*>(len);
424 int word_size = _archived_method_handle_intrinsics->size();
425 for (int i = 0; i < len; i++) {
426 Method* m = _pending_method_handle_intrinsics->at(i);
427 ArchiveBuilder::current()->write_pointer_in_buffer(_archived_method_handle_intrinsics->adr_at(i), m);
428 word_size += m->size() + m->constMethod()->size() + m->constants()->size();
429 if (m->constants()->cache() != nullptr) {
430 word_size += m->constants()->cache()->size();
431 }
432 }
433 log_info(aot)("Archived %d method handle intrinsics (%d bytes)", len, word_size * BytesPerWord);
434 }
435
436 // About "serialize" --
437 //
438 // This is (probably a badly named) way to read/write a data stream of pointers and
439 // miscellaneous data from/to the shared archive file. The usual code looks like this:
440 //
441 // // These two global C++ variables are initialized during dump time.
442 // static int _archived_int;
443 // static MetaspaceObj* archived_ptr;
444 //
445 // void MyClass::serialize(SerializeClosure* soc) {
446 // soc->do_int(&_archived_int);
447 // soc->do_int(&_archived_ptr);
448 // }
449 //
450 // At dumptime, these two variables are stored into the CDS archive.
451 // At runtime, these two variables are loaded from the CDS archive.
452 // In addition, the pointer is relocated as necessary.
453 //
454 // Some of the xxx::serialize() functions may have side effects and assume that
455 // the archive is already mapped. For example, SymbolTable::serialize_shared_table_header()
456 // unconditionally makes the set of archived symbols available. Therefore, we put most
457 // of these xxx::serialize() functions inside AOTMetaspace::serialize(), which
458 // is called AFTER we made the decision to map the archive.
459 //
460 // However, some of the "serialized" data are used to decide whether an archive should
461 // be mapped or not (e.g., for checking if the -Djdk.module.main property is compatible
462 // with the archive). The xxx::serialize() functions for these data must be put inside
463 // AOTMetaspace::early_serialize(). Such functions must not produce side effects that
464 // assume we will always decides to map the archive.
465
466 void AOTMetaspace::early_serialize(SerializeClosure* soc) {
467 int tag = 0;
468 soc->do_tag(--tag);
469 CDS_JAVA_HEAP_ONLY(Modules::serialize_archived_module_info(soc);)
470 soc->do_tag(666);
471 }
472
473 void AOTMetaspace::serialize(SerializeClosure* soc) {
474 int tag = 0;
475 soc->do_tag(--tag);
476
477 // Verify the sizes of various metadata in the system.
478 soc->do_tag(sizeof(Method));
479 soc->do_tag(sizeof(ConstMethod));
480 soc->do_tag(arrayOopDesc::base_offset_in_bytes(T_BYTE));
481 soc->do_tag(sizeof(ConstantPool));
482 soc->do_tag(sizeof(ConstantPoolCache));
483 soc->do_tag(objArrayOopDesc::base_offset_in_bytes());
484 soc->do_tag(typeArrayOopDesc::base_offset_in_bytes(T_BYTE));
485 soc->do_tag(sizeof(Symbol));
486
487 // Need to do this first, as subsequent steps may call virtual functions
488 // in archived Metadata objects.
489 CppVtables::serialize(soc);
490 soc->do_tag(--tag);
491
492 // Dump/restore miscellaneous metadata.
493 JavaClasses::serialize_offsets(soc);
494 Universe::serialize(soc);
495 soc->do_tag(--tag);
496
497 // Dump/restore references to commonly used names and signatures.
498 vmSymbols::serialize(soc);
499 soc->do_tag(--tag);
500
501 // Dump/restore the symbol/string/subgraph_info tables
502 SymbolTable::serialize_shared_table_header(soc);
503 StringTable::serialize_shared_table_header(soc);
504 HeapShared::serialize_tables(soc);
505 SystemDictionaryShared::serialize_dictionary_headers(soc);
506 AOTLinkedClassBulkLoader::serialize(soc);
507 FinalImageRecipes::serialize(soc);
508 TrainingData::serialize(soc);
509 InstanceMirrorKlass::serialize_offsets(soc);
510
511 // Dump/restore well known classes (pointers)
512 SystemDictionaryShared::serialize_vm_classes(soc);
513 soc->do_tag(--tag);
514
515 CDS_JAVA_HEAP_ONLY(ClassLoaderDataShared::serialize(soc);)
516 soc->do_ptr((void**)&_archived_method_handle_intrinsics);
517
518 LambdaFormInvokers::serialize(soc);
519 AdapterHandlerLibrary::serialize_shared_table_header(soc);
520
521 soc->do_tag(666);
522 }
523
524 // In AOTCache workflow, when dumping preimage, the constant pool entries are stored in unresolved state.
525 // So the fast version of getfield/putfield needs to be converted to nofast version.
526 // When dumping the final image in the assembly phase, these nofast versions are converted back to fast versions
527 // if the constant pool entry refered by these bytecodes is stored in resolved state.
528 // Same principle applies to static and dynamic archives. If the constant pool entry is in resolved state, then
529 // the fast version of the bytecodes can be preserved, else use the nofast version.
530 //
531 // The fast versions of aload_0 (i.e. _fast_Xaccess_0) merges the bytecode pair (aload_0, fast_Xgetfield).
532 // If the fast version of aload_0 is preserved in AOTCache, then the JVMTI notifications for field access and
533 // breakpoint events will be skipped for the second bytecode (fast_Xgetfield) in the pair.
534 // Same holds for fast versions of iload_0. So for these bytecodes, nofast version is used.
535 static void rewrite_bytecodes(const methodHandle& method) {
536 ConstantPool* cp = method->constants();
537 BytecodeStream bcs(method);
538 Bytecodes::Code new_code;
539
540 LogStreamHandle(Trace, aot, resolve) lsh;
541 if (lsh.is_enabled()) {
542 lsh.print("Rewriting bytecodes for ");
543 method()->print_external_name(&lsh);
544 lsh.print("\n");
545 }
546
547 while (!bcs.is_last_bytecode()) {
548 Bytecodes::Code opcode = bcs.next();
549 // Use current opcode as the default value of new_code
550 new_code = opcode;
551 switch(opcode) {
552 case Bytecodes::_getfield: {
553 uint rfe_index = bcs.get_index_u2();
554 bool is_resolved = cp->is_resolved(rfe_index, opcode);
555 if (is_resolved) {
556 assert(!CDSConfig::is_dumping_preimage_static_archive(), "preimage should not have resolved field references");
557 ResolvedFieldEntry* rfe = cp->resolved_field_entry_at(bcs.get_index_u2());
558 switch(rfe->tos_state()) {
559 case btos:
560 // fallthrough
561 case ztos: new_code = Bytecodes::_fast_bgetfield; break;
562 case atos: new_code = Bytecodes::_fast_agetfield; break;
563 case itos: new_code = Bytecodes::_fast_igetfield; break;
564 case ctos: new_code = Bytecodes::_fast_cgetfield; break;
565 case stos: new_code = Bytecodes::_fast_sgetfield; break;
566 case ltos: new_code = Bytecodes::_fast_lgetfield; break;
567 case ftos: new_code = Bytecodes::_fast_fgetfield; break;
568 case dtos: new_code = Bytecodes::_fast_dgetfield; break;
569 default:
570 ShouldNotReachHere();
571 break;
572 }
573 } else {
574 new_code = Bytecodes::_nofast_getfield;
575 }
576 break;
577 }
578 case Bytecodes::_putfield: {
579 uint rfe_index = bcs.get_index_u2();
580 bool is_resolved = cp->is_resolved(rfe_index, opcode);
581 if (is_resolved) {
582 assert(!CDSConfig::is_dumping_preimage_static_archive(), "preimage should not have resolved field references");
583 ResolvedFieldEntry* rfe = cp->resolved_field_entry_at(bcs.get_index_u2());
584 switch(rfe->tos_state()) {
585 case btos: new_code = Bytecodes::_fast_bputfield; break;
586 case ztos: new_code = Bytecodes::_fast_zputfield; break;
587 case atos: new_code = Bytecodes::_fast_aputfield; break;
588 case itos: new_code = Bytecodes::_fast_iputfield; break;
589 case ctos: new_code = Bytecodes::_fast_cputfield; break;
590 case stos: new_code = Bytecodes::_fast_sputfield; break;
591 case ltos: new_code = Bytecodes::_fast_lputfield; break;
592 case ftos: new_code = Bytecodes::_fast_fputfield; break;
593 case dtos: new_code = Bytecodes::_fast_dputfield; break;
594 default:
595 ShouldNotReachHere();
596 break;
597 }
598 } else {
599 new_code = Bytecodes::_nofast_putfield;
600 }
601 break;
602 }
603 case Bytecodes::_aload_0:
604 // Revert _fast_Xaccess_0 or _aload_0 to _nofast_aload_0
605 new_code = Bytecodes::_nofast_aload_0;
606 break;
607 case Bytecodes::_iload:
608 if (!bcs.is_wide()) {
609 new_code = Bytecodes::_nofast_iload;
610 }
611 break;
612 default:
613 break;
614 }
615 if (opcode != new_code) {
616 *bcs.bcp() = new_code;
617 if (lsh.is_enabled()) {
618 lsh.print_cr("%d:%s -> %s", bcs.bci(), Bytecodes::name(opcode), Bytecodes::name(new_code));
619 }
620 }
621 }
622 }
623
624 // [1] Rewrite all bytecodes as needed, so that the ConstMethod* will not be modified
625 // at run time by RewriteBytecodes/RewriteFrequentPairs
626 // [2] Assign a fingerprint, so one doesn't need to be assigned at run-time.
627 void AOTMetaspace::rewrite_bytecodes_and_calculate_fingerprints(Thread* thread, InstanceKlass* ik) {
628 for (int i = 0; i < ik->methods()->length(); i++) {
629 methodHandle m(thread, ik->methods()->at(i));
630 if (ik->can_be_verified_at_dumptime() && ik->is_linked()) {
631 rewrite_bytecodes(m);
632 }
633 Fingerprinter fp(m);
634 // The side effect of this call sets method's fingerprint field.
635 fp.fingerprint();
636 }
637 }
638
639 class VM_PopulateDumpSharedSpace : public VM_Operation {
640 private:
641 ArchiveHeapInfo _heap_info;
642 FileMapInfo* _map_info;
643 StaticArchiveBuilder& _builder;
644
645 void dump_java_heap_objects();
646 void dump_shared_symbol_table(GrowableArray<Symbol*>* symbols) {
647 log_info(aot)("Dumping symbol table ...");
648 SymbolTable::write_to_archive(symbols);
649 }
650 char* dump_early_read_only_tables();
651 char* dump_read_only_tables(AOTClassLocationConfig*& cl_config);
652
653 public:
654
655 VM_PopulateDumpSharedSpace(StaticArchiveBuilder& b) :
656 VM_Operation(), _heap_info(), _map_info(nullptr), _builder(b) {}
657
658 bool skip_operation() const { return false; }
659
660 VMOp_Type type() const { return VMOp_PopulateDumpSharedSpace; }
661 ArchiveHeapInfo* heap_info() { return &_heap_info; }
662 FileMapInfo* map_info() const { return _map_info; }
663 void doit(); // outline because gdb sucks
664 bool allow_nested_vm_operations() const { return true; }
665 }; // class VM_PopulateDumpSharedSpace
666
667 class StaticArchiveBuilder : public ArchiveBuilder {
668 public:
669 StaticArchiveBuilder() : ArchiveBuilder() {}
670
671 virtual void iterate_roots(MetaspaceClosure* it) {
672 AOTArtifactFinder::all_cached_classes_do(it);
673 SystemDictionaryShared::dumptime_classes_do(it);
674 Universe::metaspace_pointers_do(it);
675 vmSymbols::metaspace_pointers_do(it);
676 TrainingData::iterate_roots(it);
677
678 // The above code should find all the symbols that are referenced by the
679 // archived classes. We just need to add the extra symbols which
680 // may not be used by any of the archived classes -- these are usually
681 // symbols that we anticipate to be used at run time, so we can store
682 // them in the RO region, to be shared across multiple processes.
683 if (_extra_symbols != nullptr) {
684 for (int i = 0; i < _extra_symbols->length(); i++) {
685 it->push(_extra_symbols->adr_at(i));
686 }
687 }
688
689 for (int i = 0; i < _pending_method_handle_intrinsics->length(); i++) {
690 it->push(_pending_method_handle_intrinsics->adr_at(i));
691 }
692 }
693 };
694
695 char* VM_PopulateDumpSharedSpace::dump_early_read_only_tables() {
696 ArchiveBuilder::OtherROAllocMark mark;
697
698 CDS_JAVA_HEAP_ONLY(Modules::dump_archived_module_info());
699
700 DumpRegion* ro_region = ArchiveBuilder::current()->ro_region();
701 char* start = ro_region->top();
702 WriteClosure wc(ro_region);
703 AOTMetaspace::early_serialize(&wc);
704 return start;
705 }
706
707 char* VM_PopulateDumpSharedSpace::dump_read_only_tables(AOTClassLocationConfig*& cl_config) {
708 ArchiveBuilder::OtherROAllocMark mark;
709
710 SystemDictionaryShared::write_to_archive();
711 cl_config = AOTClassLocationConfig::dumptime()->write_to_archive();
712 AOTClassLinker::write_to_archive();
713 if (CDSConfig::is_dumping_preimage_static_archive()) {
714 FinalImageRecipes::record_recipes();
715 }
716
717 TrainingData::dump_training_data();
718
719 AOTMetaspace::write_method_handle_intrinsics();
720
721 // Write lambform lines into archive
722 LambdaFormInvokers::dump_static_archive_invokers();
723
724 if (CDSConfig::is_dumping_adapters()) {
725 AdapterHandlerLibrary::dump_aot_adapter_table();
726 }
727
728 // Write the other data to the output array.
729 DumpRegion* ro_region = ArchiveBuilder::current()->ro_region();
730 char* start = ro_region->top();
731 WriteClosure wc(ro_region);
732 AOTMetaspace::serialize(&wc);
733
734 return start;
735 }
736
737 void VM_PopulateDumpSharedSpace::doit() {
738 CDSConfig::set_is_at_aot_safepoint(true);
739
740 if (!CDSConfig::is_dumping_final_static_archive()) {
741 guarantee(!CDSConfig::is_using_archive(), "We should not be using an archive when we dump");
742 }
743
744 DEBUG_ONLY(SystemDictionaryShared::NoClassLoadingMark nclm);
745
746 _pending_method_handle_intrinsics = new (mtClassShared) GrowableArray<Method*>(256, mtClassShared);
747 if (CDSConfig::is_dumping_method_handles()) {
748 // When dumping AOT-linked classes, some classes may have direct references to a method handle
749 // intrinsic. The easiest thing is to save all of them into the AOT cache.
750 SystemDictionary::get_all_method_handle_intrinsics(_pending_method_handle_intrinsics);
751 }
752
753 AOTClassLocationConfig::dumptime_check_nonempty_dirs();
754
755 NOT_PRODUCT(SystemDictionary::verify();)
756
757 // Block concurrent class unloading from changing the _dumptime_table
758 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
759
760 _builder.gather_source_objs();
761 _builder.reserve_buffer();
762
763 CppVtables::dumptime_init(&_builder);
764
765 _builder.sort_metadata_objs();
766 _builder.dump_rw_metadata();
767 _builder.dump_ro_metadata();
768 _builder.relocate_metaspaceobj_embedded_pointers();
769
770 log_info(aot)("Make classes shareable");
771 _builder.make_klasses_shareable();
772 AOTMetaspace::make_method_handle_intrinsics_shareable();
773
774 dump_java_heap_objects();
775 dump_shared_symbol_table(_builder.symbols());
776
777 char* early_serialized_data = dump_early_read_only_tables();
778 AOTClassLocationConfig* cl_config;
779 char* serialized_data = dump_read_only_tables(cl_config);
780
781 if (CDSConfig::is_dumping_lambdas_in_legacy_mode()) {
782 log_info(aot)("Adjust lambda proxy class dictionary");
783 LambdaProxyClassDictionary::adjust_dumptime_table();
784 }
785
786 log_info(cds)("Make training data shareable");
787 _builder.make_training_data_shareable();
788
789 // The vtable clones contain addresses of the current process.
790 // We don't want to write these addresses into the archive.
791 CppVtables::zero_archived_vtables();
792
793 // Write the archive file
794 if (CDSConfig::is_dumping_final_static_archive()) {
795 FileMapInfo::free_current_info(); // FIXME: should not free current info
796 }
797 const char* static_archive = CDSConfig::output_archive_path();
798 assert(static_archive != nullptr, "sanity");
799 _map_info = new FileMapInfo(static_archive, true);
800 _map_info->populate_header(AOTMetaspace::core_region_alignment());
801 _map_info->set_early_serialized_data(early_serialized_data);
802 _map_info->set_serialized_data(serialized_data);
803 _map_info->set_cloned_vtables(CppVtables::vtables_serialized_base());
804 _map_info->header()->set_class_location_config(cl_config);
805
806 HeapShared::delete_tables_with_raw_oops();
807 CDSConfig::set_is_at_aot_safepoint(false);
808 }
809
810 class CollectClassesForLinking : public KlassClosure {
811 GrowableArray<OopHandle> _mirrors;
812
813 public:
814 CollectClassesForLinking() : _mirrors() {
815 // ClassLoaderDataGraph::loaded_classes_do_keepalive() requires ClassLoaderDataGraph_lock.
816 // We cannot link the classes while holding this lock (or else we may run into deadlock).
817 // Therefore, we need to first collect all the classes, keeping them alive by
818 // holding onto their java_mirrors in global OopHandles. We then link the classes after
819 // releasing the lock.
820 MutexLocker lock(ClassLoaderDataGraph_lock);
821 ClassLoaderDataGraph::loaded_classes_do_keepalive(this);
822 }
823
824 ~CollectClassesForLinking() {
825 for (int i = 0; i < _mirrors.length(); i++) {
826 _mirrors.at(i).release(Universe::vm_global());
827 }
828 }
829
830 void do_cld(ClassLoaderData* cld) {
831 assert(cld->is_alive(), "must be");
832 }
833
834 void do_klass(Klass* k) {
835 if (k->is_instance_klass()) {
836 _mirrors.append(OopHandle(Universe::vm_global(), k->java_mirror()));
837 }
838 }
839
840 const GrowableArray<OopHandle>* mirrors() const { return &_mirrors; }
841 };
842
843 // Check if we can eagerly link this class at dump time, so we can avoid the
844 // runtime linking overhead (especially verification)
845 bool AOTMetaspace::may_be_eagerly_linked(InstanceKlass* ik) {
846 if (!ik->can_be_verified_at_dumptime()) {
847 // For old classes, try to leave them in the unlinked state, so
848 // we can still store them in the archive. They must be
849 // linked/verified at runtime.
850 return false;
851 }
852 if (CDSConfig::is_dumping_dynamic_archive() && ik->defined_by_other_loaders()) {
853 // Linking of unregistered classes at this stage may cause more
854 // classes to be resolved, resulting in calls to ClassLoader.loadClass()
855 // that may not be expected by custom class loaders.
856 //
857 // It's OK to do this for the built-in loaders as we know they can
858 // tolerate this.
859 return false;
860 }
861 return true;
862 }
863
864 void AOTMetaspace::link_all_loaded_classes(JavaThread* current) {
865 while (true) {
866 ResourceMark rm(current);
867 CollectClassesForLinking collect_classes;
868 bool has_linked = false;
869 const GrowableArray<OopHandle>* mirrors = collect_classes.mirrors();
870 for (int i = 0; i < mirrors->length(); i++) {
871 OopHandle mirror = mirrors->at(i);
872 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror.resolve());
873 if (may_be_eagerly_linked(ik)) {
874 has_linked |= try_link_class(current, ik);
875 }
876 }
877
878 if (!has_linked) {
879 break;
880 }
881 // Class linking includes verification which may load more classes.
882 // Keep scanning until we have linked no more classes.
883 }
884 }
885
886 void AOTMetaspace::link_shared_classes(TRAPS) {
887 AOTClassLinker::initialize();
888 AOTClassInitializer::init_test_class(CHECK);
889
890 if (CDSConfig::is_dumping_final_static_archive()) {
891 // - Load and link all classes used in the training run.
892 // - Initialize @AOTSafeClassInitializer classes that were
893 // initialized in the training run.
894 // - Perform per-class optimization such as AOT-resolution of
895 // constant pool entries that were resolved during the training run.
896 FinalImageRecipes::apply_recipes(CHECK);
897
898 // Because the AOT assembly phase does not run the same exact code as in the
899 // training run (e.g., we use different lambda form invoker classes;
900 // generated lambda form classes are not recorded in FinalImageRecipes),
901 // the recipes do not cover all classes that have been loaded so far. As
902 // a result, we might have some unlinked classes at this point. Since we
903 // require cached classes to be linked, all such classes will be linked
904 // by the following step.
905 }
906
907 link_all_loaded_classes(THREAD);
908
909 // Eargerly resolve all string constants in constant pools
910 {
911 ResourceMark rm(THREAD);
912 CollectClassesForLinking collect_classes;
913 const GrowableArray<OopHandle>* mirrors = collect_classes.mirrors();
914 for (int i = 0; i < mirrors->length(); i++) {
915 OopHandle mirror = mirrors->at(i);
916 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror.resolve());
917 AOTConstantPoolResolver::preresolve_string_cp_entries(ik, CHECK);
918 }
919 }
920 }
921
922 void AOTMetaspace::dump_static_archive(TRAPS) {
923 CDSConfig::DumperThreadMark dumper_thread_mark(THREAD);
924 ResourceMark rm(THREAD);
925 HandleMark hm(THREAD);
926
927 if (CDSConfig::is_dumping_final_static_archive() && AOTPrintTrainingInfo) {
928 tty->print_cr("==================== archived_training_data ** before dumping ====================");
929 TrainingData::print_archived_training_data_on(tty);
930 }
931
932 StaticArchiveBuilder builder;
933 dump_static_archive_impl(builder, THREAD);
934 if (HAS_PENDING_EXCEPTION) {
935 if (PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())) {
936 aot_log_error(aot)("Out of memory. Please run with a larger Java heap, current MaxHeapSize = "
937 "%zuM", MaxHeapSize/M);
938 AOTMetaspace::writing_error();
939 } else {
940 oop message = java_lang_Throwable::message(PENDING_EXCEPTION);
941 aot_log_error(aot)("%s: %s", PENDING_EXCEPTION->klass()->external_name(),
942 message == nullptr ? "(null)" : java_lang_String::as_utf8_string(message));
943 AOTMetaspace::writing_error(err_msg("Unexpected exception, use -Xlog:aot%s,exceptions=trace for detail",
944 CDSConfig::new_aot_flags_used() ? "" : ",cds"));
945 }
946 }
947
948 if (CDSConfig::new_aot_flags_used()) {
949 if (CDSConfig::is_dumping_preimage_static_archive()) {
950 // We are in the JVM that runs the training run. Continue execution,
951 // so that it can finish all clean-up and return the correct exit
952 // code to the OS.
953 } else {
954 // The JLI launcher only recognizes the "old" -Xshare:dump flag.
955 // When the new -XX:AOTMode=create flag is used, we can't return
956 // to the JLI launcher, as the launcher will fail when trying to
957 // run the main class, which is not what we want.
958 struct stat st;
959 if (os::stat(AOTCache, &st) != 0) {
960 tty->print_cr("AOTCache creation failed: %s", AOTCache);
961 } else {
962 tty->print_cr("AOTCache creation is complete: %s " INT64_FORMAT " bytes", AOTCache, (int64_t)(st.st_size));
963 }
964 vm_direct_exit(0);
965 }
966 }
967 }
968
969 #if INCLUDE_CDS_JAVA_HEAP && defined(_LP64)
970 void AOTMetaspace::adjust_heap_sizes_for_dumping() {
971 if (!CDSConfig::is_dumping_heap() || UseCompressedOops) {
972 return;
973 }
974 // CDS heap dumping requires all string oops to have an offset
975 // from the heap bottom that can be encoded in 32-bit.
976 julong max_heap_size = (julong)(4 * G);
977
978 if (MinHeapSize > max_heap_size) {
979 log_debug(aot)("Setting MinHeapSize to 4G for CDS dumping, original size = %zuM", MinHeapSize/M);
980 FLAG_SET_ERGO(MinHeapSize, max_heap_size);
981 }
982 if (InitialHeapSize > max_heap_size) {
983 log_debug(aot)("Setting InitialHeapSize to 4G for CDS dumping, original size = %zuM", InitialHeapSize/M);
984 FLAG_SET_ERGO(InitialHeapSize, max_heap_size);
985 }
986 if (MaxHeapSize > max_heap_size) {
987 log_debug(aot)("Setting MaxHeapSize to 4G for CDS dumping, original size = %zuM", MaxHeapSize/M);
988 FLAG_SET_ERGO(MaxHeapSize, max_heap_size);
989 }
990 }
991 #endif // INCLUDE_CDS_JAVA_HEAP && _LP64
992
993 void AOTMetaspace::get_default_classlist(char* default_classlist, const size_t buf_size) {
994 const char* filesep = os::file_separator();
995 jio_snprintf(default_classlist, buf_size, "%s%slib%sclasslist",
996 Arguments::get_java_home(), filesep, filesep);
997 }
998
999 void AOTMetaspace::load_classes(TRAPS) {
1000 char default_classlist[JVM_MAXPATHLEN];
1001 const char* classlist_path;
1002
1003 get_default_classlist(default_classlist, JVM_MAXPATHLEN);
1004 if (SharedClassListFile == nullptr) {
1005 classlist_path = default_classlist;
1006 } else {
1007 classlist_path = SharedClassListFile;
1008 }
1009
1010 aot_log_info(aot)("Loading classes to share ...");
1011 ClassListParser::parse_classlist(classlist_path,
1012 ClassListParser::_parse_all, CHECK);
1013 if (ExtraSharedClassListFile) {
1014 ClassListParser::parse_classlist(ExtraSharedClassListFile,
1015 ClassListParser::_parse_all, CHECK);
1016 }
1017 if (classlist_path != default_classlist) {
1018 struct stat statbuf;
1019 if (os::stat(default_classlist, &statbuf) == 0) {
1020 // File exists, let's use it.
1021 ClassListParser::parse_classlist(default_classlist,
1022 ClassListParser::_parse_lambda_forms_invokers_only, CHECK);
1023 }
1024 }
1025
1026 // Some classes are used at CDS runtime but are not yet loaded at this point.
1027 // We can perform dummmy calls to these classes at dumptime to ensure they
1028 // are archived.
1029 exercise_runtime_cds_code(CHECK);
1030
1031 aot_log_info(aot)("Loading classes to share: done.");
1032 }
1033
1034 void AOTMetaspace::exercise_runtime_cds_code(TRAPS) {
1035 // Exercise the manifest processing code
1036 const char* dummy = "Manifest-Version: 1.0\n";
1037 CDSProtectionDomain::create_jar_manifest(dummy, strlen(dummy), CHECK);
1038
1039 // Exercise FileSystem and URL code
1040 CDSProtectionDomain::to_file_URL("dummy.jar", Handle(), CHECK);
1041 }
1042
1043 void AOTMetaspace::dump_static_archive_impl(StaticArchiveBuilder& builder, TRAPS) {
1044 if (CDSConfig::is_dumping_classic_static_archive()) {
1045 // We are running with -Xshare:dump
1046 load_classes(CHECK);
1047
1048 if (SharedArchiveConfigFile) {
1049 log_info(aot)("Reading extra data from %s ...", SharedArchiveConfigFile);
1050 read_extra_data(THREAD, SharedArchiveConfigFile);
1051 log_info(aot)("Reading extra data: done.");
1052 }
1053 }
1054
1055 if (CDSConfig::is_dumping_preimage_static_archive()) {
1056 log_info(aot)("Reading lambda form invokers from JDK default classlist ...");
1057 char default_classlist[JVM_MAXPATHLEN];
1058 get_default_classlist(default_classlist, JVM_MAXPATHLEN);
1059 struct stat statbuf;
1060 if (os::stat(default_classlist, &statbuf) == 0) {
1061 ClassListParser::parse_classlist(default_classlist,
1062 ClassListParser::_parse_lambda_forms_invokers_only, CHECK);
1063 }
1064 }
1065
1066 #if INCLUDE_CDS_JAVA_HEAP
1067 if (CDSConfig::is_dumping_heap()) {
1068 assert(CDSConfig::allow_only_single_java_thread(), "Required");
1069 if (!HeapShared::is_archived_boot_layer_available(THREAD)) {
1070 report_loading_error("archivedBootLayer not available, disabling full module graph");
1071 CDSConfig::stop_dumping_full_module_graph();
1072 }
1073 // Do this before link_shared_classes(), as the following line may load new classes.
1074 HeapShared::init_for_dumping(CHECK);
1075 }
1076 #endif
1077
1078 if (CDSConfig::is_dumping_final_static_archive()) {
1079 if (ExtraSharedClassListFile) {
1080 log_info(aot)("Loading extra classes from %s ...", ExtraSharedClassListFile);
1081 ClassListParser::parse_classlist(ExtraSharedClassListFile,
1082 ClassListParser::_parse_all, CHECK);
1083 }
1084 }
1085
1086 // Rewrite and link classes
1087 log_info(aot)("Rewriting and linking classes ...");
1088
1089 // Link any classes which got missed. This would happen if we have loaded classes that
1090 // were not explicitly specified in the classlist. E.g., if an interface implemented by class K
1091 // fails verification, all other interfaces that were not specified in the classlist but
1092 // are implemented by K are not verified.
1093 link_shared_classes(CHECK);
1094 log_info(aot)("Rewriting and linking classes: done");
1095 TrainingData::init_dumptime_table(CHECK); // captures TrainingDataSetLocker
1096
1097 if (CDSConfig::is_dumping_regenerated_lambdaform_invokers()) {
1098 LambdaFormInvokers::regenerate_holder_classes(CHECK);
1099 }
1100
1101 #if INCLUDE_CDS_JAVA_HEAP
1102 if (CDSConfig::is_dumping_heap()) {
1103 ArchiveHeapWriter::init();
1104
1105 if (CDSConfig::is_dumping_full_module_graph()) {
1106 ClassLoaderDataShared::ensure_module_entry_tables_exist();
1107 HeapShared::reset_archived_object_states(CHECK);
1108 }
1109
1110 AOTReferenceObjSupport::initialize(CHECK);
1111 AOTReferenceObjSupport::stabilize_cached_reference_objects(CHECK);
1112
1113 if (CDSConfig::is_initing_classes_at_dump_time()) {
1114 // java.lang.Class::reflectionFactory cannot be archived yet. We set this field
1115 // to null, and it will be initialized again at runtime.
1116 log_debug(aot)("Resetting Class::reflectionFactory");
1117 TempNewSymbol method_name = SymbolTable::new_symbol("resetArchivedStates");
1118 Symbol* method_sig = vmSymbols::void_method_signature();
1119 JavaValue result(T_VOID);
1120 JavaCalls::call_static(&result, vmClasses::Class_klass(),
1121 method_name, method_sig, CHECK);
1122
1123 // Perhaps there is a way to avoid hard-coding these names here.
1124 // See discussion in JDK-8342481.
1125 }
1126
1127 // Do this at the very end, when no Java code will be executed. Otherwise
1128 // some new strings may be added to the intern table.
1129 StringTable::allocate_shared_strings_array(CHECK);
1130 } else {
1131 log_info(aot)("Not dumping heap, reset CDSConfig::_is_using_optimized_module_handling");
1132 CDSConfig::stop_using_optimized_module_handling();
1133 }
1134 #endif
1135
1136 VM_PopulateDumpSharedSpace op(builder);
1137 VMThread::execute(&op);
1138
1139 if (AOTCodeCache::is_on_for_dump() && CDSConfig::is_dumping_final_static_archive()) {
1140 CDSConfig::enable_dumping_aot_code();
1141 {
1142 builder.start_ac_region();
1143 // Write the contents to AOT code region and close AOTCodeCache before packing the region
1144 AOTCodeCache::close();
1145 builder.end_ac_region();
1146 }
1147 CDSConfig::disable_dumping_aot_code();
1148 }
1149
1150 bool status = write_static_archive(&builder, op.map_info(), op.heap_info());
1151 if (status && CDSConfig::is_dumping_preimage_static_archive()) {
1152 tty->print_cr("%s AOTConfiguration recorded: %s",
1153 CDSConfig::has_temp_aot_config_file() ? "Temporary" : "", AOTConfiguration);
1154 if (CDSConfig::is_single_command_training()) {
1155 fork_and_dump_final_static_archive(CHECK);
1156 }
1157 }
1158
1159 if (!status) {
1160 THROW_MSG(vmSymbols::java_io_IOException(), "Encountered error while dumping");
1161 }
1162 }
1163
1164 bool AOTMetaspace::write_static_archive(ArchiveBuilder* builder, FileMapInfo* map_info, ArchiveHeapInfo* heap_info) {
1165 // relocate the data so that it can be mapped to AOTMetaspace::requested_base_address()
1166 // without runtime relocation.
1167 builder->relocate_to_requested();
1168
1169 map_info->open_as_output();
1170 if (!map_info->is_open()) {
1171 return false;
1172 }
1173 builder->write_archive(map_info, heap_info);
1174 return true;
1175 }
1176
1177 static void print_java_launcher(outputStream* st) {
1178 st->print("%s%sbin%sjava", Arguments::get_java_home(), os::file_separator(), os::file_separator());
1179 }
1180
1181 static void append_args(GrowableArray<Handle>* args, const char* arg, TRAPS) {
1182 Handle string = java_lang_String::create_from_str(arg, CHECK);
1183 args->append(string);
1184 }
1185
1186 // Pass all options in Arguments::jvm_args_array() to a child JVM process
1187 // using the JAVA_TOOL_OPTIONS environment variable.
1188 static int exec_jvm_with_java_tool_options(const char* java_launcher_path, TRAPS) {
1189 ResourceMark rm(THREAD);
1190 HandleMark hm(THREAD);
1191 GrowableArray<Handle> args;
1192
1193 const char* cp = Arguments::get_appclasspath();
1194 if (cp != nullptr && strlen(cp) > 0 && strcmp(cp, ".") != 0) {
1195 // We cannot use "-cp", because "-cp" is only interpreted by the java launcher,
1196 // and is not interpreter by arguments.cpp when it loads args from JAVA_TOOL_OPTIONS
1197 stringStream ss;
1198 ss.print("-Djava.class.path=");
1199 ss.print_raw(cp);
1200 append_args(&args, ss.freeze(), CHECK_0);
1201 // CDS$ProcessLauncher::execWithJavaToolOptions() must unset CLASSPATH, which has
1202 // a higher priority than -Djava.class.path=
1203 }
1204
1205 // Pass all arguments. These include those from JAVA_TOOL_OPTIONS and _JAVA_OPTIONS.
1206 for (int i = 0; i < Arguments::num_jvm_args(); i++) {
1207 const char* arg = Arguments::jvm_args_array()[i];
1208 if (strstr(arg, "-XX:AOTCacheOutput=") == arg || // arg starts with ...
1209 strstr(arg, "-XX:AOTConfiguration=") == arg ||
1210 strstr(arg, "-XX:AOTMode=") == arg) {
1211 // Filter these out. They wiill be set below.
1212 } else {
1213 append_args(&args, arg, CHECK_0);
1214 }
1215 }
1216
1217 // Note: because we are running in AOTMode=record, JDK_AOT_VM_OPTIONS have not been
1218 // parsed, so they are not in Arguments::jvm_args_array. If JDK_AOT_VM_OPTIONS is in
1219 // the environment, it will be inherited and parsed by the child JVM process
1220 // in Arguments::parse_java_tool_options_environment_variable().
1221 precond(strcmp(AOTMode, "record") == 0);
1222
1223 // We don't pass Arguments::jvm_flags_array(), as those will be added by
1224 // the child process when it loads .hotspotrc
1225
1226 {
1227 // If AOTCacheOutput contains %p, it should have been already substituted with the
1228 // pid of the training process.
1229 stringStream ss;
1230 ss.print("-XX:AOTCacheOutput=");
1231 ss.print_raw(AOTCacheOutput);
1232 append_args(&args, ss.freeze(), CHECK_0);
1233 }
1234 {
1235 // If AOTCacheConfiguration contains %p, it should have been already substituted with the
1236 // pid of the training process.
1237 // If AOTCacheConfiguration was not explicitly specified, it should have been assigned a
1238 // temporary file name.
1239 stringStream ss;
1240 ss.print("-XX:AOTConfiguration=");
1241 ss.print_raw(AOTConfiguration);
1242 append_args(&args, ss.freeze(), CHECK_0);
1243 }
1244
1245 append_args(&args, "-XX:AOTMode=create", CHECK_0);
1246
1247 Symbol* klass_name = SymbolTable::new_symbol("jdk/internal/misc/CDS$ProcessLauncher");
1248 Klass* k = SystemDictionary::resolve_or_fail(klass_name, true, CHECK_0);
1249 Symbol* methodName = SymbolTable::new_symbol("execWithJavaToolOptions");
1250 Symbol* methodSignature = SymbolTable::new_symbol("(Ljava/lang/String;[Ljava/lang/String;)I");
1251
1252 Handle launcher = java_lang_String::create_from_str(java_launcher_path, CHECK_0);
1253 objArrayOop array = oopFactory::new_objArray(vmClasses::String_klass(), args.length(), CHECK_0);
1254 for (int i = 0; i < args.length(); i++) {
1255 array->obj_at_put(i, args.at(i)());
1256 }
1257 objArrayHandle launcher_args(THREAD, array);
1258
1259 // The following call will pass all options inside the JAVA_TOOL_OPTIONS env variable to
1260 // the child process. It will also clear the _JAVA_OPTIONS and CLASSPATH env variables for
1261 // the child process.
1262 //
1263 // Note: the env variables are set only for the child process. They are not changed
1264 // for the current process. See java.lang.ProcessBuilder::environment().
1265 JavaValue result(T_OBJECT);
1266 JavaCallArguments javacall_args(2);
1267 javacall_args.push_oop(launcher);
1268 javacall_args.push_oop(launcher_args);
1269 JavaCalls::call_static(&result,
1270 InstanceKlass::cast(k),
1271 methodName,
1272 methodSignature,
1273 &javacall_args,
1274 CHECK_0);
1275 return result.get_jint();
1276 }
1277
1278 void AOTMetaspace::fork_and_dump_final_static_archive(TRAPS) {
1279 assert(CDSConfig::is_dumping_preimage_static_archive(), "sanity");
1280
1281 ResourceMark rm;
1282 stringStream ss;
1283 print_java_launcher(&ss);
1284 const char* cmd = ss.freeze();
1285 tty->print_cr("Launching child process %s to assemble AOT cache %s using configuration %s", cmd, AOTCacheOutput, AOTConfiguration);
1286 int status = exec_jvm_with_java_tool_options(cmd, CHECK);
1287 if (status != 0) {
1288 log_error(aot)("Child process failed; status = %d", status);
1289 // We leave the temp config file for debugging
1290 } else if (CDSConfig::has_temp_aot_config_file()) {
1291 const char* tmp_config = AOTConfiguration;
1292 // On Windows, need WRITE permission to remove the file.
1293 WINDOWS_ONLY(chmod(tmp_config, _S_IREAD | _S_IWRITE));
1294 status = remove(tmp_config);
1295 if (status != 0) {
1296 log_error(aot)("Failed to remove temporary AOT configuration file %s", tmp_config);
1297 } else {
1298 tty->print_cr("Removed temporary AOT configuration file %s", tmp_config);
1299 }
1300 }
1301 }
1302
1303 // Returns true if the class's status has changed.
1304 bool AOTMetaspace::try_link_class(JavaThread* current, InstanceKlass* ik) {
1305 ExceptionMark em(current);
1306 JavaThread* THREAD = current; // For exception macros.
1307 assert(CDSConfig::is_dumping_archive(), "sanity");
1308
1309 if (ik->in_aot_cache() && !CDSConfig::is_dumping_final_static_archive()) {
1310 assert(CDSConfig::is_dumping_dynamic_archive(), "must be");
1311 return false;
1312 }
1313
1314 if (ik->is_loaded() && !ik->is_linked() && ik->can_be_verified_at_dumptime() &&
1315 !SystemDictionaryShared::has_class_failed_verification(ik)) {
1316 bool saved = BytecodeVerificationLocal;
1317 if (ik->defined_by_other_loaders() && ik->class_loader() == nullptr) {
1318 // The verification decision is based on BytecodeVerificationRemote
1319 // for non-system classes. Since we are using the null classloader
1320 // to load non-system classes for customized class loaders during dumping,
1321 // we need to temporarily change BytecodeVerificationLocal to be the same as
1322 // BytecodeVerificationRemote. Note this can cause the parent system
1323 // classes also being verified. The extra overhead is acceptable during
1324 // dumping.
1325 BytecodeVerificationLocal = BytecodeVerificationRemote;
1326 }
1327 ik->link_class(THREAD);
1328 if (HAS_PENDING_EXCEPTION) {
1329 ResourceMark rm(THREAD);
1330 aot_log_warning(aot)("Preload Warning: Verification failed for %s",
1331 ik->external_name());
1332 CLEAR_PENDING_EXCEPTION;
1333 SystemDictionaryShared::set_class_has_failed_verification(ik);
1334 } else {
1335 assert(!SystemDictionaryShared::has_class_failed_verification(ik), "sanity");
1336 ik->compute_has_loops_flag_for_methods();
1337 }
1338 BytecodeVerificationLocal = saved;
1339 return true;
1340 } else {
1341 return false;
1342 }
1343 }
1344
1345 void VM_PopulateDumpSharedSpace::dump_java_heap_objects() {
1346 if (CDSConfig::is_dumping_heap()) {
1347 HeapShared::write_heap(&_heap_info);
1348 } else {
1349 CDSConfig::log_reasons_for_not_dumping_heap();
1350 }
1351 }
1352
1353 void AOTMetaspace::set_aot_metaspace_range(void* base, void *static_top, void* top) {
1354 assert(base <= static_top && static_top <= top, "must be");
1355 _aot_metaspace_static_top = static_top;
1356 MetaspaceObj::set_aot_metaspace_range(base, top);
1357 }
1358
1359 bool AOTMetaspace::in_aot_cache_dynamic_region(void* p) {
1360 if ((p < MetaspaceObj::aot_metaspace_top()) &&
1361 (p >= _aot_metaspace_static_top)) {
1362 return true;
1363 } else {
1364 return false;
1365 }
1366 }
1367
1368 bool AOTMetaspace::in_aot_cache_static_region(void* p) {
1369 if (in_aot_cache(p) && !in_aot_cache_dynamic_region(p)) {
1370 return true;
1371 } else {
1372 return false;
1373 }
1374 }
1375
1376 // This function is called when the JVM is unable to load the specified archive(s) due to one
1377 // of the following conditions.
1378 // - There's an error that indicates that the archive(s) files were corrupt or otherwise damaged.
1379 // - When -XX:+RequireSharedSpaces is specified, AND the JVM cannot load the archive(s) due
1380 // to version or classpath mismatch.
1381 void AOTMetaspace::unrecoverable_loading_error(const char* message) {
1382 report_loading_error("%s", message);
1383
1384 if (CDSConfig::is_dumping_final_static_archive()) {
1385 vm_exit_during_initialization("Must be a valid AOT configuration generated by the current JVM", AOTConfiguration);
1386 } else if (CDSConfig::new_aot_flags_used()) {
1387 vm_exit_during_initialization("Unable to use AOT cache.", nullptr);
1388 } else {
1389 vm_exit_during_initialization("Unable to use shared archive. Unrecoverable archive loading error (run with -Xlog:aot,cds for details)", message);
1390 }
1391 }
1392
1393 void AOTMetaspace::report_loading_error(const char* format, ...) {
1394 // When using AOT cache, errors messages are always printed on the error channel.
1395 LogStream ls_aot(LogLevel::Error, LogTagSetMapping<LOG_TAGS(aot)>::tagset());
1396
1397 // If we are loading load the default CDS archive, it may fail due to incompatible VM options.
1398 // Print at the info level to avoid excessive verbosity.
1399 // However, if the user has specified a CDS archive (or AOT cache), they would be interested in
1400 // knowing that the loading fails, so we print at the error level.
1401 LogLevelType level = (!CDSConfig::is_using_archive() || CDSConfig::is_using_only_default_archive()) ?
1402 LogLevel::Info : LogLevel::Error;
1403 LogStream ls_cds(level, LogTagSetMapping<LOG_TAGS(cds)>::tagset());
1404
1405 LogStream& ls = CDSConfig::new_aot_flags_used() ? ls_aot : ls_cds;
1406 if (!ls.is_enabled()) {
1407 return;
1408 }
1409
1410 va_list ap;
1411 va_start(ap, format);
1412
1413 static bool printed_error = false;
1414 if (!printed_error) { // No need for locks. Loading error checks happen only in main thread.
1415 ls.print_cr("An error has occurred while processing the %s. Run with -Xlog:%s for details.",
1416 CDSConfig::type_of_archive_being_loaded(), CDSConfig::new_aot_flags_used() ? "aot" : "aot,cds");
1417 printed_error = true;
1418 }
1419 ls.vprint_cr(format, ap);
1420
1421 va_end(ap);
1422 }
1423
1424 // This function is called when the JVM is unable to write the specified CDS archive due to an
1425 // unrecoverable error.
1426 void AOTMetaspace::unrecoverable_writing_error(const char* message) {
1427 writing_error(message);
1428 vm_direct_exit(1);
1429 }
1430
1431 // This function is called when the JVM is unable to write the specified CDS archive due to a
1432 // an error. The error will be propagated
1433 void AOTMetaspace::writing_error(const char* message) {
1434 aot_log_error(aot)("An error has occurred while writing the shared archive file.");
1435 if (message != nullptr) {
1436 aot_log_error(aot)("%s", message);
1437 }
1438 }
1439
1440 void AOTMetaspace::initialize_runtime_shared_and_meta_spaces() {
1441 assert(CDSConfig::is_using_archive(), "Must be called when UseSharedSpaces is enabled");
1442 MapArchiveResult result = MAP_ARCHIVE_OTHER_FAILURE;
1443
1444 FileMapInfo* static_mapinfo = open_static_archive();
1445 FileMapInfo* dynamic_mapinfo = nullptr;
1446
1447 if (static_mapinfo != nullptr) {
1448 aot_log_info(aot)("Core region alignment: %zu", static_mapinfo->core_region_alignment());
1449 dynamic_mapinfo = open_dynamic_archive();
1450
1451 aot_log_info(aot)("ArchiveRelocationMode: %d", ArchiveRelocationMode);
1452
1453 // First try to map at the requested address
1454 result = map_archives(static_mapinfo, dynamic_mapinfo, true);
1455 if (result == MAP_ARCHIVE_MMAP_FAILURE) {
1456 // Mapping has failed (probably due to ASLR). Let's map at an address chosen
1457 // by the OS.
1458 aot_log_info(aot)("Try to map archive(s) at an alternative address");
1459 result = map_archives(static_mapinfo, dynamic_mapinfo, false);
1460 }
1461 }
1462
1463 if (result == MAP_ARCHIVE_SUCCESS) {
1464 bool dynamic_mapped = (dynamic_mapinfo != nullptr && dynamic_mapinfo->is_mapped());
1465 char* cds_base = static_mapinfo->mapped_base();
1466 char* cds_end = dynamic_mapped ? dynamic_mapinfo->mapped_end() : static_mapinfo->mapped_end();
1467 // Register CDS memory region with LSan.
1468 LSAN_REGISTER_ROOT_REGION(cds_base, cds_end - cds_base);
1469 set_aot_metaspace_range(cds_base, static_mapinfo->mapped_end(), cds_end);
1470 _relocation_delta = static_mapinfo->relocation_delta();
1471 _requested_base_address = static_mapinfo->requested_base_address();
1472 if (dynamic_mapped) {
1473 // turn AutoCreateSharedArchive off if successfully mapped
1474 AutoCreateSharedArchive = false;
1475 }
1476 } else {
1477 set_aot_metaspace_range(nullptr, nullptr, nullptr);
1478 if (CDSConfig::is_dumping_dynamic_archive()) {
1479 aot_log_warning(aot)("-XX:ArchiveClassesAtExit is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info.");
1480 }
1481 UseSharedSpaces = false;
1482 // The base archive cannot be mapped. We cannot dump the dynamic shared archive.
1483 AutoCreateSharedArchive = false;
1484 CDSConfig::disable_dumping_dynamic_archive();
1485 if (PrintSharedArchiveAndExit) {
1486 AOTMetaspace::unrecoverable_loading_error("Unable to use shared archive.");
1487 } else {
1488 if (RequireSharedSpaces) {
1489 AOTMetaspace::unrecoverable_loading_error("Unable to map shared spaces");
1490 } else {
1491 report_loading_error("Unable to map shared spaces");
1492 }
1493 }
1494 }
1495
1496 // If mapping failed and -XShare:on, the vm should exit
1497 bool has_failed = false;
1498 if (static_mapinfo != nullptr && !static_mapinfo->is_mapped()) {
1499 has_failed = true;
1500 delete static_mapinfo;
1501 }
1502 if (dynamic_mapinfo != nullptr && !dynamic_mapinfo->is_mapped()) {
1503 has_failed = true;
1504 delete dynamic_mapinfo;
1505 }
1506 if (RequireSharedSpaces && has_failed) {
1507 AOTMetaspace::unrecoverable_loading_error("Unable to map shared spaces");
1508 }
1509 }
1510
1511 FileMapInfo* AOTMetaspace::open_static_archive() {
1512 const char* static_archive = CDSConfig::input_static_archive_path();
1513 assert(static_archive != nullptr, "sanity");
1514 FileMapInfo* mapinfo = new FileMapInfo(static_archive, true);
1515 if (!mapinfo->open_as_input()) {
1516 delete(mapinfo);
1517 log_info(cds)("Opening of static archive %s failed", static_archive);
1518 return nullptr;
1519 }
1520 return mapinfo;
1521 }
1522
1523 FileMapInfo* AOTMetaspace::open_dynamic_archive() {
1524 if (CDSConfig::is_dumping_dynamic_archive()) {
1525 return nullptr;
1526 }
1527 const char* dynamic_archive = CDSConfig::input_dynamic_archive_path();
1528 if (dynamic_archive == nullptr) {
1529 return nullptr;
1530 }
1531
1532 FileMapInfo* mapinfo = new FileMapInfo(dynamic_archive, false);
1533 if (!mapinfo->open_as_input()) {
1534 delete(mapinfo);
1535 if (RequireSharedSpaces) {
1536 AOTMetaspace::unrecoverable_loading_error("Failed to initialize dynamic archive");
1537 }
1538 return nullptr;
1539 }
1540 return mapinfo;
1541 }
1542
1543 // use_requested_addr:
1544 // true = map at FileMapHeader::_requested_base_address
1545 // false = map at an alternative address picked by OS.
1546 MapArchiveResult AOTMetaspace::map_archives(FileMapInfo* static_mapinfo, FileMapInfo* dynamic_mapinfo,
1547 bool use_requested_addr) {
1548 if (use_requested_addr && static_mapinfo->requested_base_address() == nullptr) {
1549 aot_log_info(aot)("Archive(s) were created with -XX:SharedBaseAddress=0. Always map at os-selected address.");
1550 return MAP_ARCHIVE_MMAP_FAILURE;
1551 }
1552
1553 PRODUCT_ONLY(if (ArchiveRelocationMode == 1 && use_requested_addr) {
1554 // For product build only -- this is for benchmarking the cost of doing relocation.
1555 // For debug builds, the check is done below, after reserving the space, for better test coverage
1556 // (see comment below).
1557 aot_log_info(aot)("ArchiveRelocationMode == 1: always map archive(s) at an alternative address");
1558 return MAP_ARCHIVE_MMAP_FAILURE;
1559 });
1560
1561 if (ArchiveRelocationMode == 2 && !use_requested_addr) {
1562 aot_log_info(aot)("ArchiveRelocationMode == 2: never map archive(s) at an alternative address");
1563 return MAP_ARCHIVE_MMAP_FAILURE;
1564 };
1565
1566 if (dynamic_mapinfo != nullptr) {
1567 // Ensure that the OS won't be able to allocate new memory spaces between the two
1568 // archives, or else it would mess up the simple comparison in MetaspaceObj::in_aot_cache().
1569 assert(static_mapinfo->mapping_end_offset() == dynamic_mapinfo->mapping_base_offset(), "no gap");
1570 }
1571
1572 ReservedSpace total_space_rs, archive_space_rs, class_space_rs;
1573 MapArchiveResult result = MAP_ARCHIVE_OTHER_FAILURE;
1574 size_t prot_zone_size = 0;
1575 char* mapped_base_address = reserve_address_space_for_archives(static_mapinfo,
1576 dynamic_mapinfo,
1577 use_requested_addr,
1578 total_space_rs,
1579 archive_space_rs,
1580 class_space_rs);
1581 if (mapped_base_address == nullptr) {
1582 result = MAP_ARCHIVE_MMAP_FAILURE;
1583 aot_log_debug(aot)("Failed to reserve spaces (use_requested_addr=%u)", (unsigned)use_requested_addr);
1584 } else {
1585
1586 if (Metaspace::using_class_space()) {
1587 prot_zone_size = protection_zone_size();
1588 }
1589
1590 #ifdef ASSERT
1591 // Some sanity checks after reserving address spaces for archives
1592 // and class space.
1593 assert(archive_space_rs.is_reserved(), "Sanity");
1594 if (Metaspace::using_class_space()) {
1595 assert(archive_space_rs.base() == mapped_base_address &&
1596 archive_space_rs.size() > protection_zone_size(),
1597 "Archive space must lead and include the protection zone");
1598 // Class space must closely follow the archive space. Both spaces
1599 // must be aligned correctly.
1600 assert(class_space_rs.is_reserved() && class_space_rs.size() > 0,
1601 "A class space should have been reserved");
1602 assert(class_space_rs.base() >= archive_space_rs.end(),
1603 "class space should follow the cds archive space");
1604 assert(is_aligned(archive_space_rs.base(),
1605 core_region_alignment()),
1606 "Archive space misaligned");
1607 assert(is_aligned(class_space_rs.base(),
1608 Metaspace::reserve_alignment()),
1609 "class space misaligned");
1610 }
1611 #endif // ASSERT
1612
1613 aot_log_info(aot)("Reserved archive_space_rs [" INTPTR_FORMAT " - " INTPTR_FORMAT "] (%zu) bytes%s",
1614 p2i(archive_space_rs.base()), p2i(archive_space_rs.end()), archive_space_rs.size(),
1615 (prot_zone_size > 0 ? " (includes protection zone)" : ""));
1616 aot_log_info(aot)("Reserved class_space_rs [" INTPTR_FORMAT " - " INTPTR_FORMAT "] (%zu) bytes",
1617 p2i(class_space_rs.base()), p2i(class_space_rs.end()), class_space_rs.size());
1618
1619 if (AOTMetaspace::use_windows_memory_mapping()) {
1620 // We have now reserved address space for the archives, and will map in
1621 // the archive files into this space.
1622 //
1623 // Special handling for Windows: on Windows we cannot map a file view
1624 // into an existing memory mapping. So, we unmap the address range we
1625 // just reserved again, which will make it available for mapping the
1626 // archives.
1627 // Reserving this range has not been for naught however since it makes
1628 // us reasonably sure the address range is available.
1629 //
1630 // But still it may fail, since between unmapping the range and mapping
1631 // in the archive someone else may grab the address space. Therefore
1632 // there is a fallback in FileMap::map_region() where we just read in
1633 // the archive files sequentially instead of mapping it in. We couple
1634 // this with use_requested_addr, since we're going to patch all the
1635 // pointers anyway so there's no benefit to mmap.
1636 if (use_requested_addr) {
1637 assert(!total_space_rs.is_reserved(), "Should not be reserved for Windows");
1638 aot_log_info(aot)("Windows mmap workaround: releasing archive space.");
1639 MemoryReserver::release(archive_space_rs);
1640 // Mark as not reserved
1641 archive_space_rs = {};
1642 // The protection zone is part of the archive:
1643 // See comment above, the Windows way of loading CDS is to mmap the individual
1644 // parts of the archive into the address region we just vacated. The protection
1645 // zone will not be mapped (and, in fact, does not exist as physical region in
1646 // the archive). Therefore, after removing the archive space above, we must
1647 // re-reserve the protection zone part lest something else gets mapped into that
1648 // area later.
1649 if (prot_zone_size > 0) {
1650 assert(prot_zone_size >= os::vm_allocation_granularity(), "must be"); // not just page size!
1651 char* p = os::attempt_reserve_memory_at(mapped_base_address, prot_zone_size,
1652 mtClassShared);
1653 assert(p == mapped_base_address || p == nullptr, "must be");
1654 if (p == nullptr) {
1655 aot_log_debug(aot)("Failed to re-reserve protection zone");
1656 return MAP_ARCHIVE_MMAP_FAILURE;
1657 }
1658 }
1659 }
1660 }
1661
1662 if (prot_zone_size > 0) {
1663 os::commit_memory(mapped_base_address, prot_zone_size, false); // will later be protected
1664 // Before mapping the core regions into the newly established address space, we mark
1665 // start and the end of the future protection zone with canaries. That way we easily
1666 // catch mapping errors (accidentally mapping data into the future protection zone).
1667 *(mapped_base_address) = 'P';
1668 *(mapped_base_address + prot_zone_size - 1) = 'P';
1669 }
1670
1671 MapArchiveResult static_result = map_archive(static_mapinfo, mapped_base_address, archive_space_rs);
1672 MapArchiveResult dynamic_result = (static_result == MAP_ARCHIVE_SUCCESS) ?
1673 map_archive(dynamic_mapinfo, mapped_base_address, archive_space_rs) : MAP_ARCHIVE_OTHER_FAILURE;
1674
1675 DEBUG_ONLY(if (ArchiveRelocationMode == 1 && use_requested_addr) {
1676 // This is for simulating mmap failures at the requested address. In
1677 // debug builds, we do it here (after all archives have possibly been
1678 // mapped), so we can thoroughly test the code for failure handling
1679 // (releasing all allocated resource, etc).
1680 aot_log_info(aot)("ArchiveRelocationMode == 1: always map archive(s) at an alternative address");
1681 if (static_result == MAP_ARCHIVE_SUCCESS) {
1682 static_result = MAP_ARCHIVE_MMAP_FAILURE;
1683 }
1684 if (dynamic_result == MAP_ARCHIVE_SUCCESS) {
1685 dynamic_result = MAP_ARCHIVE_MMAP_FAILURE;
1686 }
1687 });
1688
1689 if (static_result == MAP_ARCHIVE_SUCCESS) {
1690 if (dynamic_result == MAP_ARCHIVE_SUCCESS) {
1691 result = MAP_ARCHIVE_SUCCESS;
1692 } else if (dynamic_result == MAP_ARCHIVE_OTHER_FAILURE) {
1693 assert(dynamic_mapinfo != nullptr && !dynamic_mapinfo->is_mapped(), "must have failed");
1694 // No need to retry mapping the dynamic archive again, as it will never succeed
1695 // (bad file, etc) -- just keep the base archive.
1696 log_warning(cds, dynamic)("Unable to use shared archive. The top archive failed to load: %s",
1697 dynamic_mapinfo->full_path());
1698 result = MAP_ARCHIVE_SUCCESS;
1699 // TODO, we can give the unused space for the dynamic archive to class_space_rs, but there's no
1700 // easy API to do that right now.
1701 } else {
1702 result = MAP_ARCHIVE_MMAP_FAILURE;
1703 }
1704 } else if (static_result == MAP_ARCHIVE_OTHER_FAILURE) {
1705 result = MAP_ARCHIVE_OTHER_FAILURE;
1706 } else {
1707 result = MAP_ARCHIVE_MMAP_FAILURE;
1708 }
1709 }
1710
1711 if (result == MAP_ARCHIVE_SUCCESS) {
1712 SharedBaseAddress = (size_t)mapped_base_address;
1713 #ifdef _LP64
1714 if (Metaspace::using_class_space()) {
1715 assert(prot_zone_size > 0 &&
1716 *(mapped_base_address) == 'P' &&
1717 *(mapped_base_address + prot_zone_size - 1) == 'P',
1718 "Protection zone was overwritten?");
1719 // Set up ccs in metaspace.
1720 Metaspace::initialize_class_space(class_space_rs);
1721
1722 // Set up compressed Klass pointer encoding: the encoding range must
1723 // cover both archive and class space.
1724 const address klass_range_start = (address)mapped_base_address;
1725 const size_t klass_range_size = (address)class_space_rs.end() - klass_range_start;
1726 if (INCLUDE_CDS_JAVA_HEAP || UseCompactObjectHeaders) {
1727 // The CDS archive may contain narrow Klass IDs that were precomputed at archive generation time:
1728 // - every archived java object header (only if INCLUDE_CDS_JAVA_HEAP)
1729 // - every archived Klass' prototype (only if +UseCompactObjectHeaders)
1730 //
1731 // In order for those IDs to still be valid, we need to dictate base and shift: base should be the
1732 // mapping start (including protection zone), shift should be the shift used at archive generation time.
1733 CompressedKlassPointers::initialize_for_given_encoding(
1734 klass_range_start, klass_range_size,
1735 klass_range_start, ArchiveBuilder::precomputed_narrow_klass_shift() // precomputed encoding, see ArchiveBuilder
1736 );
1737 assert(CompressedKlassPointers::base() == klass_range_start, "must be");
1738 } else {
1739 // Let JVM freely choose encoding base and shift
1740 CompressedKlassPointers::initialize(klass_range_start, klass_range_size);
1741 assert(CompressedKlassPointers::base() == nullptr ||
1742 CompressedKlassPointers::base() == klass_range_start, "must be");
1743 }
1744 // Establish protection zone, but only if we need one
1745 if (CompressedKlassPointers::base() == klass_range_start) {
1746 CompressedKlassPointers::establish_protection_zone(klass_range_start, prot_zone_size);
1747 }
1748
1749 // map_or_load_heap_region() compares the current narrow oop and klass encodings
1750 // with the archived ones, so it must be done after all encodings are determined.
1751 static_mapinfo->map_or_load_heap_region();
1752 }
1753 #endif // _LP64
1754 log_info(aot)("initial optimized module handling: %s", CDSConfig::is_using_optimized_module_handling() ? "enabled" : "disabled");
1755 log_info(aot)("initial full module graph: %s", CDSConfig::is_using_full_module_graph() ? "enabled" : "disabled");
1756 } else {
1757 unmap_archive(static_mapinfo);
1758 unmap_archive(dynamic_mapinfo);
1759 release_reserved_spaces(total_space_rs, archive_space_rs, class_space_rs);
1760 }
1761
1762 return result;
1763 }
1764
1765
1766 // This will reserve two address spaces suitable to house Klass structures, one
1767 // for the cds archives (static archive and optionally dynamic archive) and
1768 // optionally one move for ccs.
1769 //
1770 // Since both spaces must fall within the compressed class pointer encoding
1771 // range, they are allocated close to each other.
1772 //
1773 // Space for archives will be reserved first, followed by a potential gap,
1774 // followed by the space for ccs:
1775 //
1776 // +-- Base address A B End
1777 // | | | |
1778 // v v v v
1779 // +-------------+--------------+ +----------------------+
1780 // | static arc | [dyn. arch] | [gap] | compr. class space |
1781 // +-------------+--------------+ +----------------------+
1782 //
1783 // (The gap may result from different alignment requirements between metaspace
1784 // and CDS)
1785 //
1786 // If UseCompressedClassPointers is disabled, only one address space will be
1787 // reserved:
1788 //
1789 // +-- Base address End
1790 // | |
1791 // v v
1792 // +-------------+--------------+
1793 // | static arc | [dyn. arch] |
1794 // +-------------+--------------+
1795 //
1796 // Base address: If use_archive_base_addr address is true, the Base address is
1797 // determined by the address stored in the static archive. If
1798 // use_archive_base_addr address is false, this base address is determined
1799 // by the platform.
1800 //
1801 // If UseCompressedClassPointers=1, the range encompassing both spaces will be
1802 // suitable to en/decode narrow Klass pointers: the base will be valid for
1803 // encoding, the range [Base, End) and not surpass the max. range for that encoding.
1804 //
1805 // Return:
1806 //
1807 // - On success:
1808 // - total_space_rs will be reserved as whole for archive_space_rs and
1809 // class_space_rs if UseCompressedClassPointers is true.
1810 // On Windows, try reserve archive_space_rs and class_space_rs
1811 // separately first if use_archive_base_addr is true.
1812 // - archive_space_rs will be reserved and large enough to host static and
1813 // if needed dynamic archive: [Base, A).
1814 // archive_space_rs.base and size will be aligned to CDS reserve
1815 // granularity.
1816 // - class_space_rs: If UseCompressedClassPointers=1, class_space_rs will
1817 // be reserved. Its start address will be aligned to metaspace reserve
1818 // alignment, which may differ from CDS alignment. It will follow the cds
1819 // archive space, close enough such that narrow class pointer encoding
1820 // covers both spaces.
1821 // If UseCompressedClassPointers=0, class_space_rs remains unreserved.
1822 // - On error: null is returned and the spaces remain unreserved.
1823 char* AOTMetaspace::reserve_address_space_for_archives(FileMapInfo* static_mapinfo,
1824 FileMapInfo* dynamic_mapinfo,
1825 bool use_archive_base_addr,
1826 ReservedSpace& total_space_rs,
1827 ReservedSpace& archive_space_rs,
1828 ReservedSpace& class_space_rs) {
1829
1830 address const base_address = (address) (use_archive_base_addr ? static_mapinfo->requested_base_address() : nullptr);
1831 const size_t archive_space_alignment = core_region_alignment();
1832
1833 // Size and requested location of the archive_space_rs (for both static and dynamic archives)
1834 size_t archive_end_offset = (dynamic_mapinfo == nullptr) ? static_mapinfo->mapping_end_offset() : dynamic_mapinfo->mapping_end_offset();
1835 size_t archive_space_size = align_up(archive_end_offset, archive_space_alignment);
1836
1837 if (!Metaspace::using_class_space()) {
1838 // Get the simple case out of the way first:
1839 // no compressed class space, simple allocation.
1840
1841 // When running without class space, requested archive base should be aligned to cds core alignment.
1842 assert(is_aligned(base_address, archive_space_alignment),
1843 "Archive base address unaligned: " PTR_FORMAT ", needs alignment: %zu.",
1844 p2i(base_address), archive_space_alignment);
1845
1846 archive_space_rs = MemoryReserver::reserve((char*)base_address,
1847 archive_space_size,
1848 archive_space_alignment,
1849 os::vm_page_size(),
1850 mtNone);
1851 if (archive_space_rs.is_reserved()) {
1852 assert(base_address == nullptr ||
1853 (address)archive_space_rs.base() == base_address, "Sanity");
1854 // Register archive space with NMT.
1855 MemTracker::record_virtual_memory_tag(archive_space_rs, mtClassShared);
1856 return archive_space_rs.base();
1857 }
1858 return nullptr;
1859 }
1860
1861 #ifdef _LP64
1862
1863 // Complex case: two spaces adjacent to each other, both to be addressable
1864 // with narrow class pointers.
1865 // We reserve the whole range spanning both spaces, then split that range up.
1866
1867 const size_t class_space_alignment = Metaspace::reserve_alignment();
1868
1869 // When running with class space, requested archive base must satisfy both cds core alignment
1870 // and class space alignment.
1871 const size_t base_address_alignment = MAX2(class_space_alignment, archive_space_alignment);
1872 assert(is_aligned(base_address, base_address_alignment),
1873 "Archive base address unaligned: " PTR_FORMAT ", needs alignment: %zu.",
1874 p2i(base_address), base_address_alignment);
1875
1876 size_t class_space_size = CompressedClassSpaceSize;
1877 assert(CompressedClassSpaceSize > 0 &&
1878 is_aligned(CompressedClassSpaceSize, class_space_alignment),
1879 "CompressedClassSpaceSize malformed: %zu", CompressedClassSpaceSize);
1880
1881 const size_t ccs_begin_offset = align_up(archive_space_size, class_space_alignment);
1882 const size_t gap_size = ccs_begin_offset - archive_space_size;
1883
1884 // Reduce class space size if it would not fit into the Klass encoding range
1885 constexpr size_t max_encoding_range_size = 4 * G;
1886 guarantee(archive_space_size < max_encoding_range_size - class_space_alignment, "Archive too large");
1887 if ((archive_space_size + gap_size + class_space_size) > max_encoding_range_size) {
1888 class_space_size = align_down(max_encoding_range_size - archive_space_size - gap_size, class_space_alignment);
1889 log_info(metaspace)("CDS initialization: reducing class space size from %zu to %zu",
1890 CompressedClassSpaceSize, class_space_size);
1891 FLAG_SET_ERGO(CompressedClassSpaceSize, class_space_size);
1892 }
1893
1894 const size_t total_range_size =
1895 archive_space_size + gap_size + class_space_size;
1896
1897 // Test that class space base address plus shift can be decoded by aarch64, when restored.
1898 const int precomputed_narrow_klass_shift = ArchiveBuilder::precomputed_narrow_klass_shift();
1899 if (!CompressedKlassPointers::check_klass_decode_mode(base_address, precomputed_narrow_klass_shift,
1900 total_range_size)) {
1901 aot_log_info(aot)("CDS initialization: Cannot use SharedBaseAddress " PTR_FORMAT " with precomputed shift %d.",
1902 p2i(base_address), precomputed_narrow_klass_shift);
1903 use_archive_base_addr = false;
1904 }
1905
1906 assert(total_range_size > ccs_begin_offset, "must be");
1907 if (use_windows_memory_mapping() && use_archive_base_addr) {
1908 if (base_address != nullptr) {
1909 // On Windows, we cannot safely split a reserved memory space into two (see JDK-8255917).
1910 // Hence, we optimistically reserve archive space and class space side-by-side. We only
1911 // do this for use_archive_base_addr=true since for use_archive_base_addr=false case
1912 // caller will not split the combined space for mapping, instead read the archive data
1913 // via sequential file IO.
1914 address ccs_base = base_address + archive_space_size + gap_size;
1915 archive_space_rs = MemoryReserver::reserve((char*)base_address,
1916 archive_space_size,
1917 archive_space_alignment,
1918 os::vm_page_size(),
1919 mtNone);
1920 class_space_rs = MemoryReserver::reserve((char*)ccs_base,
1921 class_space_size,
1922 class_space_alignment,
1923 os::vm_page_size(),
1924 mtNone);
1925 }
1926 if (!archive_space_rs.is_reserved() || !class_space_rs.is_reserved()) {
1927 release_reserved_spaces(total_space_rs, archive_space_rs, class_space_rs);
1928 return nullptr;
1929 }
1930 MemTracker::record_virtual_memory_tag(archive_space_rs, mtClassShared);
1931 MemTracker::record_virtual_memory_tag(class_space_rs, mtClass);
1932 } else {
1933 if (use_archive_base_addr && base_address != nullptr) {
1934 total_space_rs = MemoryReserver::reserve((char*) base_address,
1935 total_range_size,
1936 base_address_alignment,
1937 os::vm_page_size(),
1938 mtNone);
1939 } else {
1940 // We did not manage to reserve at the preferred address, or were instructed to relocate. In that
1941 // case we reserve wherever possible, but the start address needs to be encodable as narrow Klass
1942 // encoding base since the archived heap objects contain narrow Klass IDs pre-calculated toward the start
1943 // of the shared Metaspace. That prevents us from using zero-based encoding and therefore we won't
1944 // try allocating in low-address regions.
1945 total_space_rs = Metaspace::reserve_address_space_for_compressed_classes(total_range_size, false /* optimize_for_zero_base */);
1946 }
1947
1948 if (!total_space_rs.is_reserved()) {
1949 return nullptr;
1950 }
1951
1952 // Paranoid checks:
1953 assert(!use_archive_base_addr || (address)total_space_rs.base() == base_address,
1954 "Sanity (" PTR_FORMAT " vs " PTR_FORMAT ")", p2i(base_address), p2i(total_space_rs.base()));
1955 assert(is_aligned(total_space_rs.base(), base_address_alignment), "Sanity");
1956 assert(total_space_rs.size() == total_range_size, "Sanity");
1957
1958 // Now split up the space into ccs and cds archive. For simplicity, just leave
1959 // the gap reserved at the end of the archive space. Do not do real splitting.
1960 archive_space_rs = total_space_rs.first_part(ccs_begin_offset,
1961 (size_t)archive_space_alignment);
1962 class_space_rs = total_space_rs.last_part(ccs_begin_offset);
1963 MemTracker::record_virtual_memory_split_reserved(total_space_rs.base(), total_space_rs.size(),
1964 ccs_begin_offset, mtClassShared, mtClass);
1965 }
1966 assert(is_aligned(archive_space_rs.base(), archive_space_alignment), "Sanity");
1967 assert(is_aligned(archive_space_rs.size(), archive_space_alignment), "Sanity");
1968 assert(is_aligned(class_space_rs.base(), class_space_alignment), "Sanity");
1969 assert(is_aligned(class_space_rs.size(), class_space_alignment), "Sanity");
1970
1971
1972 return archive_space_rs.base();
1973
1974 #else
1975 ShouldNotReachHere();
1976 return nullptr;
1977 #endif
1978
1979 }
1980
1981 void AOTMetaspace::release_reserved_spaces(ReservedSpace& total_space_rs,
1982 ReservedSpace& archive_space_rs,
1983 ReservedSpace& class_space_rs) {
1984 if (total_space_rs.is_reserved()) {
1985 aot_log_debug(aot)("Released shared space (archive + class) " INTPTR_FORMAT, p2i(total_space_rs.base()));
1986 MemoryReserver::release(total_space_rs);
1987 total_space_rs = {};
1988 } else {
1989 if (archive_space_rs.is_reserved()) {
1990 aot_log_debug(aot)("Released shared space (archive) " INTPTR_FORMAT, p2i(archive_space_rs.base()));
1991 MemoryReserver::release(archive_space_rs);
1992 archive_space_rs = {};
1993 }
1994 if (class_space_rs.is_reserved()) {
1995 aot_log_debug(aot)("Released shared space (classes) " INTPTR_FORMAT, p2i(class_space_rs.base()));
1996 MemoryReserver::release(class_space_rs);
1997 class_space_rs = {};
1998 }
1999 }
2000 }
2001
2002 static int archive_regions[] = { AOTMetaspace::rw, AOTMetaspace::ro };
2003 static int archive_regions_count = 2;
2004
2005 MapArchiveResult AOTMetaspace::map_archive(FileMapInfo* mapinfo, char* mapped_base_address, ReservedSpace rs) {
2006 assert(CDSConfig::is_using_archive(), "must be runtime");
2007 if (mapinfo == nullptr) {
2008 return MAP_ARCHIVE_SUCCESS; // The dynamic archive has not been specified. No error has happened -- trivially succeeded.
2009 }
2010
2011 mapinfo->set_is_mapped(false);
2012 if (mapinfo->core_region_alignment() != (size_t)core_region_alignment()) {
2013 report_loading_error("Unable to map CDS archive -- core_region_alignment() expected: %zu"
2014 " actual: %zu", mapinfo->core_region_alignment(), core_region_alignment());
2015 return MAP_ARCHIVE_OTHER_FAILURE;
2016 }
2017
2018 MapArchiveResult result =
2019 mapinfo->map_regions(archive_regions, archive_regions_count, mapped_base_address, rs);
2020
2021 if (result != MAP_ARCHIVE_SUCCESS) {
2022 unmap_archive(mapinfo);
2023 return result;
2024 }
2025
2026 if (!mapinfo->validate_class_location()) {
2027 unmap_archive(mapinfo);
2028 return MAP_ARCHIVE_OTHER_FAILURE;
2029 }
2030
2031 if (mapinfo->is_static()) {
2032 // Currently, only static archive uses early serialized data.
2033 char* buffer = mapinfo->early_serialized_data();
2034 intptr_t* array = (intptr_t*)buffer;
2035 ReadClosure rc(&array, (intptr_t)mapped_base_address);
2036 early_serialize(&rc);
2037 }
2038
2039 if (!mapinfo->validate_aot_class_linking()) {
2040 unmap_archive(mapinfo);
2041 return MAP_ARCHIVE_OTHER_FAILURE;
2042 }
2043
2044 mapinfo->set_is_mapped(true);
2045 return MAP_ARCHIVE_SUCCESS;
2046 }
2047
2048 void AOTMetaspace::unmap_archive(FileMapInfo* mapinfo) {
2049 assert(CDSConfig::is_using_archive(), "must be runtime");
2050 if (mapinfo != nullptr) {
2051 mapinfo->unmap_regions(archive_regions, archive_regions_count);
2052 mapinfo->unmap_region(AOTMetaspace::bm);
2053 mapinfo->set_is_mapped(false);
2054 }
2055 }
2056
2057 // For -XX:PrintSharedArchiveAndExit
2058 class CountSharedSymbols : public SymbolClosure {
2059 private:
2060 int _count;
2061 public:
2062 CountSharedSymbols() : _count(0) {}
2063 void do_symbol(Symbol** sym) {
2064 _count++;
2065 }
2066 int total() { return _count; }
2067
2068 };
2069
2070 // Read the miscellaneous data from the shared file, and
2071 // serialize it out to its various destinations.
2072
2073 void AOTMetaspace::initialize_shared_spaces() {
2074 FileMapInfo *static_mapinfo = FileMapInfo::current_info();
2075 FileMapInfo *dynamic_mapinfo = FileMapInfo::dynamic_info();
2076
2077 // Verify various attributes of the archive, plus initialize the
2078 // shared string/symbol tables.
2079 char* buffer = static_mapinfo->serialized_data();
2080 intptr_t* array = (intptr_t*)buffer;
2081 ReadClosure rc(&array, (intptr_t)SharedBaseAddress);
2082 serialize(&rc);
2083
2084 // Finish up archived heap initialization. These must be
2085 // done after ReadClosure.
2086 static_mapinfo->patch_heap_embedded_pointers();
2087 ArchiveHeapLoader::finish_initialization();
2088 Universe::load_archived_object_instances();
2089 AOTCodeCache::initialize();
2090
2091 if (dynamic_mapinfo != nullptr) {
2092 intptr_t* buffer = (intptr_t*)dynamic_mapinfo->serialized_data();
2093 ReadClosure rc(&buffer, (intptr_t)SharedBaseAddress);
2094 DynamicArchive::serialize(&rc);
2095 DynamicArchive::setup_array_klasses();
2096 }
2097
2098 LogStreamHandle(Info, aot) lsh;
2099 if (lsh.is_enabled()) {
2100 lsh.print("Using AOT-linked classes: %s (static archive: %s aot-linked classes",
2101 BOOL_TO_STR(CDSConfig::is_using_aot_linked_classes()),
2102 static_mapinfo->header()->has_aot_linked_classes() ? "has" : "no");
2103 if (dynamic_mapinfo != nullptr) {
2104 lsh.print(", dynamic archive: %s aot-linked classes",
2105 dynamic_mapinfo->header()->has_aot_linked_classes() ? "has" : "no");
2106 }
2107 lsh.print_cr(")");
2108 }
2109
2110 // Set up LambdaFormInvokers::_lambdaform_lines for dynamic dump
2111 if (CDSConfig::is_dumping_dynamic_archive()) {
2112 // Read stored LF format lines stored in static archive
2113 LambdaFormInvokers::read_static_archive_invokers();
2114 }
2115
2116 if (PrintSharedArchiveAndExit) {
2117 // Print archive names
2118 if (dynamic_mapinfo != nullptr) {
2119 tty->print_cr("\n\nBase archive name: %s", CDSConfig::input_static_archive_path());
2120 tty->print_cr("Base archive version %d", static_mapinfo->version());
2121 } else {
2122 tty->print_cr("Static archive name: %s", static_mapinfo->full_path());
2123 tty->print_cr("Static archive version %d", static_mapinfo->version());
2124 }
2125
2126 SystemDictionaryShared::print_shared_archive(tty);
2127 if (dynamic_mapinfo != nullptr) {
2128 tty->print_cr("\n\nDynamic archive name: %s", dynamic_mapinfo->full_path());
2129 tty->print_cr("Dynamic archive version %d", dynamic_mapinfo->version());
2130 SystemDictionaryShared::print_shared_archive(tty, false/*dynamic*/);
2131 }
2132
2133 TrainingData::print_archived_training_data_on(tty);
2134
2135 AOTCodeCache::print_on(tty);
2136
2137 // collect shared symbols and strings
2138 CountSharedSymbols cl;
2139 SymbolTable::shared_symbols_do(&cl);
2140 tty->print_cr("Number of shared symbols: %d", cl.total());
2141 tty->print_cr("Number of shared strings: %zu", StringTable::shared_entry_count());
2142 tty->print_cr("VM version: %s\r\n", static_mapinfo->vm_version());
2143 if (FileMapInfo::current_info() == nullptr || _archive_loading_failed) {
2144 tty->print_cr("archive is invalid");
2145 vm_exit(1);
2146 } else {
2147 tty->print_cr("archive is valid");
2148 vm_exit(0);
2149 }
2150 }
2151 }
2152
2153 // JVM/TI RedefineClasses() support:
2154 bool AOTMetaspace::remap_shared_readonly_as_readwrite() {
2155 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
2156
2157 if (CDSConfig::is_using_archive()) {
2158 // remap the shared readonly space to shared readwrite, private
2159 FileMapInfo* mapinfo = FileMapInfo::current_info();
2160 if (!mapinfo->remap_shared_readonly_as_readwrite()) {
2161 return false;
2162 }
2163 if (FileMapInfo::dynamic_info() != nullptr) {
2164 mapinfo = FileMapInfo::dynamic_info();
2165 if (!mapinfo->remap_shared_readonly_as_readwrite()) {
2166 return false;
2167 }
2168 }
2169 _remapped_readwrite = true;
2170 }
2171 return true;
2172 }
2173
2174 void AOTMetaspace::print_on(outputStream* st) {
2175 if (CDSConfig::is_using_archive()) {
2176 st->print("CDS archive(s) mapped at: ");
2177 address base = (address)MetaspaceObj::aot_metaspace_base();
2178 address static_top = (address)_aot_metaspace_static_top;
2179 address top = (address)MetaspaceObj::aot_metaspace_top();
2180 st->print("[" PTR_FORMAT "-" PTR_FORMAT "-" PTR_FORMAT "), ", p2i(base), p2i(static_top), p2i(top));
2181 st->print("size %zu, ", top - base);
2182 st->print("SharedBaseAddress: " PTR_FORMAT ", ArchiveRelocationMode: %d.", SharedBaseAddress, ArchiveRelocationMode);
2183 } else {
2184 st->print("CDS archive(s) not mapped");
2185 }
2186 st->cr();
2187 }