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