1 /*
   2  * Copyright (c) 2023, 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/aotLogging.hpp"
  26 #include "cds/aotMapLogger.hpp"
  27 #include "cds/archiveHeapLoader.hpp"
  28 #include "cds/cdsConfig.hpp"
  29 #include "cds/classListWriter.hpp"
  30 #include "cds/filemap.hpp"
  31 #include "cds/heapShared.hpp"
  32 #include "classfile/classLoaderDataShared.hpp"
  33 #include "classfile/moduleEntry.hpp"
  34 #include "code/aotCodeCache.hpp"
  35 #include "include/jvm_io.h"
  36 #include "logging/log.hpp"
  37 #include "memory/universe.hpp"
  38 #include "prims/jvmtiAgentList.hpp"
  39 #include "runtime/arguments.hpp"
  40 #include "runtime/globals.hpp"
  41 #include "runtime/globals_extension.hpp"
  42 #include "runtime/java.hpp"
  43 #include "runtime/vmThread.hpp"
  44 #include "utilities/defaultStream.hpp"
  45 #include "utilities/formatBuffer.hpp"
  46 
  47 bool CDSConfig::_is_dumping_static_archive = false;
  48 bool CDSConfig::_is_dumping_preimage_static_archive = false;
  49 bool CDSConfig::_is_dumping_final_static_archive = false;
  50 bool CDSConfig::_is_dumping_dynamic_archive = false;
  51 bool CDSConfig::_is_using_optimized_module_handling = true;
  52 bool CDSConfig::_is_dumping_full_module_graph = true;
  53 bool CDSConfig::_is_using_full_module_graph = true;
  54 bool CDSConfig::_has_aot_linked_classes = false;
  55 bool CDSConfig::_is_single_command_training = false;
  56 bool CDSConfig::_has_temp_aot_config_file = false;
  57 bool CDSConfig::_old_cds_flags_used = false;
  58 bool CDSConfig::_new_aot_flags_used = false;
  59 bool CDSConfig::_disable_heap_dumping = false;
  60 bool CDSConfig::_is_at_aot_safepoint = false;
  61 
  62 bool CDSConfig::_module_patching_disables_cds = false;
  63 bool CDSConfig::_java_base_module_patching_disables_cds = false;
  64 
  65 const char* CDSConfig::_default_archive_path = nullptr;
  66 const char* CDSConfig::_input_static_archive_path = nullptr;
  67 const char* CDSConfig::_input_dynamic_archive_path = nullptr;
  68 const char* CDSConfig::_output_archive_path = nullptr;
  69 
  70 JavaThread* CDSConfig::_dumper_thread = nullptr;
  71 
  72 int CDSConfig::get_status() {
  73   assert(Universe::is_fully_initialized(), "status is finalized only after Universe is initialized");
  74   return (is_dumping_archive()              ? IS_DUMPING_ARCHIVE : 0) |
  75          (is_dumping_method_handles()       ? IS_DUMPING_METHOD_HANDLES : 0) |
  76          (is_dumping_static_archive()       ? IS_DUMPING_STATIC_ARCHIVE : 0) |
  77          (is_logging_lambda_form_invokers() ? IS_LOGGING_LAMBDA_FORM_INVOKERS : 0) |
  78          (is_using_archive()                ? IS_USING_ARCHIVE : 0);
  79 }
  80 
  81 DEBUG_ONLY(static bool _cds_ergo_initialize_started = false);
  82 
  83 void CDSConfig::ergo_initialize() {
  84   DEBUG_ONLY(_cds_ergo_initialize_started = true);
  85 
  86   if (is_dumping_static_archive() && !is_dumping_final_static_archive()) {
  87     // Note: -Xshare and -XX:AOTMode flags are mutually exclusive.
  88     // - Classic workflow: -Xshare:on and -Xshare:dump cannot take effect at the same time.
  89     // - JEP 483 workflow: -XX:AOTMode:record and -XX:AOTMode=on cannot take effect at the same time.
  90     // So we can never come to here with RequireSharedSpaces==true.
  91     assert(!RequireSharedSpaces, "sanity");
  92 
  93     // If dumping the classic archive, or making an AOT training run (dumping a preimage archive),
  94     // for sanity, parse all classes from classfiles.
  95     // TODO: in the future, if we want to support re-training on top of an existing AOT cache, this
  96     // needs to be changed.
  97     UseSharedSpaces = false;
  98   }
  99 
 100   // Initialize shared archive paths which could include both base and dynamic archive paths
 101   // This must be after set_ergonomics_flags() called so flag UseCompressedOops is set properly.
 102   if (is_dumping_static_archive() || is_using_archive()) {
 103     if (new_aot_flags_used()) {
 104       ergo_init_aot_paths();
 105     } else {
 106       ergo_init_classic_archive_paths();
 107     }
 108   }
 109 
 110   if (!is_dumping_heap()) {
 111     _is_dumping_full_module_graph = false;
 112   }
 113 
 114   AOTMapLogger::ergo_initialize();
 115 }
 116 
 117 const char* CDSConfig::default_archive_path() {
 118   // The path depends on UseCompressedOops, etc, which are set by GC ergonomics just
 119   // before CDSConfig::ergo_initialize() is called.
 120   assert(_cds_ergo_initialize_started, "sanity");
 121   if (_default_archive_path == nullptr) {
 122     stringStream tmp;
 123     if (is_vm_statically_linked()) {
 124       // It's easier to form the path using JAVA_HOME as os::jvm_path
 125       // gives the path to the launcher executable on static JDK.
 126       const char* subdir = WINDOWS_ONLY("bin") NOT_WINDOWS("lib");
 127       tmp.print("%s%s%s%s%s%sclasses",
 128                 Arguments::get_java_home(), os::file_separator(),
 129                 subdir, os::file_separator(),
 130                 Abstract_VM_Version::vm_variant(), os::file_separator());
 131     } else {
 132       // Assume .jsa is in the same directory where libjvm resides on
 133       // non-static JDK.
 134       char jvm_path[JVM_MAXPATHLEN];
 135       os::jvm_path(jvm_path, sizeof(jvm_path));
 136       char *end = strrchr(jvm_path, *os::file_separator());
 137       if (end != nullptr) *end = '\0';
 138       tmp.print("%s%sclasses", jvm_path, os::file_separator());
 139     }
 140 #ifdef _LP64
 141     if (!UseCompressedOops) {
 142       tmp.print_raw("_nocoops");
 143     }
 144     if (UseCompactObjectHeaders) {
 145       // Note that generation of xxx_coh.jsa variants require
 146       // --enable-cds-archive-coh at build time
 147       tmp.print_raw("_coh");
 148     }
 149 #endif
 150     if (is_valhalla_preview()) {
 151       tmp.print_raw("_valhalla");
 152     }
 153     tmp.print_raw(".jsa");
 154     _default_archive_path = os::strdup(tmp.base());
 155   }
 156   return _default_archive_path;
 157 }
 158 
 159 int CDSConfig::num_archive_paths(const char* path_spec) {
 160   if (path_spec == nullptr) {
 161     return 0;
 162   }
 163   int npaths = 1;
 164   char* p = (char*)path_spec;
 165   while (*p != '\0') {
 166     if (*p == os::path_separator()[0]) {
 167       npaths++;
 168     }
 169     p++;
 170   }
 171   return npaths;
 172 }
 173 
 174 void CDSConfig::extract_archive_paths(const char* archive_path,
 175                                       const char** base_archive_path,
 176                                       const char** top_archive_path) {
 177   char* begin_ptr = (char*)archive_path;
 178   char* end_ptr = strchr((char*)archive_path, os::path_separator()[0]);
 179   if (end_ptr == nullptr || end_ptr == begin_ptr) {
 180     vm_exit_during_initialization("Base archive was not specified", archive_path);
 181   }
 182   size_t len = end_ptr - begin_ptr;
 183   char* cur_path = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal);
 184   strncpy(cur_path, begin_ptr, len);
 185   cur_path[len] = '\0';
 186   *base_archive_path = cur_path;
 187 
 188   begin_ptr = ++end_ptr;
 189   if (*begin_ptr == '\0') {
 190     vm_exit_during_initialization("Top archive was not specified", archive_path);
 191   }
 192   end_ptr = strchr(begin_ptr, '\0');
 193   assert(end_ptr != nullptr, "sanity");
 194   len = end_ptr - begin_ptr;
 195   cur_path = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal);
 196   strncpy(cur_path, begin_ptr, len + 1);
 197   *top_archive_path = cur_path;
 198 }
 199 
 200 void CDSConfig::ergo_init_classic_archive_paths() {
 201   assert(_cds_ergo_initialize_started, "sanity");
 202   if (ArchiveClassesAtExit != nullptr) {
 203     assert(!RecordDynamicDumpInfo, "already checked");
 204     if (is_dumping_static_archive()) {
 205       vm_exit_during_initialization("-XX:ArchiveClassesAtExit cannot be used with -Xshare:dump");
 206     }
 207     check_unsupported_dumping_module_options();
 208 
 209     if (os::same_files(default_archive_path(), ArchiveClassesAtExit)) {
 210       vm_exit_during_initialization(
 211         "Cannot specify the default CDS archive for -XX:ArchiveClassesAtExit", default_archive_path());
 212     }
 213   }
 214 
 215   if (SharedArchiveFile == nullptr) {
 216     _input_static_archive_path = default_archive_path();
 217     if (is_dumping_static_archive()) {
 218       _output_archive_path = _input_static_archive_path;
 219     }
 220   } else {
 221     int num_archives = num_archive_paths(SharedArchiveFile);
 222     assert(num_archives > 0, "must be");
 223 
 224     if (is_dumping_archive() && num_archives > 1) {
 225       vm_exit_during_initialization(
 226         "Cannot have more than 1 archive file specified in -XX:SharedArchiveFile during CDS dumping");
 227     }
 228 
 229     if (is_dumping_static_archive()) {
 230       assert(num_archives == 1, "just checked above");
 231       // Static dump is simple: only one archive is allowed in SharedArchiveFile. This file
 232       // will be overwritten regardless of its contents
 233       _output_archive_path = SharedArchiveFile;
 234     } else {
 235       // SharedArchiveFile may specify one or two files. In case (c), the path for base.jsa
 236       // is read from top.jsa
 237       //    (a) 1 file:  -XX:SharedArchiveFile=base.jsa
 238       //    (b) 2 files: -XX:SharedArchiveFile=base.jsa:top.jsa
 239       //    (c) 2 files: -XX:SharedArchiveFile=top.jsa
 240       //
 241       // However, if either RecordDynamicDumpInfo or ArchiveClassesAtExit is used, we do not
 242       // allow cases (b) and (c). Case (b) is already checked above.
 243 
 244       if (num_archives > 2) {
 245         vm_exit_during_initialization(
 246           "Cannot have more than 2 archive files specified in the -XX:SharedArchiveFile option");
 247       }
 248 
 249       if (num_archives == 1) {
 250         const char* base_archive_path = nullptr;
 251         bool success =
 252           FileMapInfo::get_base_archive_name_from_header(SharedArchiveFile, &base_archive_path);
 253         if (!success) {
 254           // If +AutoCreateSharedArchive and the specified shared archive does not exist,
 255           // regenerate the dynamic archive base on default archive.
 256           if (AutoCreateSharedArchive && !os::file_exists(SharedArchiveFile)) {
 257             enable_dumping_dynamic_archive(SharedArchiveFile);
 258             FLAG_SET_ERGO(ArchiveClassesAtExit, SharedArchiveFile);
 259             _input_static_archive_path = default_archive_path();
 260             FLAG_SET_ERGO(SharedArchiveFile, nullptr);
 261          } else {
 262             if (AutoCreateSharedArchive) {
 263               warning("-XX:+AutoCreateSharedArchive is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info.");
 264               AutoCreateSharedArchive = false;
 265             }
 266             aot_log_error(aot)("Not a valid %s (%s)", type_of_archive_being_loaded(), SharedArchiveFile);
 267             Arguments::no_shared_spaces("invalid archive");
 268           }
 269         } else if (base_archive_path == nullptr) {
 270           // User has specified a single archive, which is a static archive.
 271           _input_static_archive_path = SharedArchiveFile;
 272         } else {
 273           // User has specified a single archive, which is a dynamic archive.
 274           _input_dynamic_archive_path = SharedArchiveFile;
 275           _input_static_archive_path = base_archive_path; // has been c-heap allocated.
 276         }
 277       } else {
 278         extract_archive_paths(SharedArchiveFile,
 279                               &_input_static_archive_path, &_input_dynamic_archive_path);
 280         if (_input_static_archive_path == nullptr) {
 281           assert(_input_dynamic_archive_path == nullptr, "must be");
 282           Arguments::no_shared_spaces("invalid archive");
 283         }
 284       }
 285 
 286       if (_input_dynamic_archive_path != nullptr) {
 287         // Check for case (c)
 288         if (RecordDynamicDumpInfo) {
 289           vm_exit_during_initialization("-XX:+RecordDynamicDumpInfo is unsupported when a dynamic CDS archive is specified in -XX:SharedArchiveFile",
 290                                         SharedArchiveFile);
 291         }
 292         if (ArchiveClassesAtExit != nullptr) {
 293           vm_exit_during_initialization("-XX:ArchiveClassesAtExit is unsupported when a dynamic CDS archive is specified in -XX:SharedArchiveFile",
 294                                         SharedArchiveFile);
 295         }
 296       }
 297 
 298       if (ArchiveClassesAtExit != nullptr && os::same_files(SharedArchiveFile, ArchiveClassesAtExit)) {
 299           vm_exit_during_initialization(
 300             "Cannot have the same archive file specified for -XX:SharedArchiveFile and -XX:ArchiveClassesAtExit",
 301             SharedArchiveFile);
 302       }
 303     }
 304   }
 305 }
 306 
 307 void CDSConfig::check_internal_module_property(const char* key, const char* value) {
 308   if (Arguments::is_incompatible_cds_internal_module_property(key) && !Arguments::patching_migrated_classes(key, value)) {
 309     stop_using_optimized_module_handling();
 310     aot_log_info(aot)("optimized module handling: disabled due to incompatible property: %s=%s", key, value);
 311   }
 312 }
 313 
 314 void CDSConfig::check_incompatible_property(const char* key, const char* value) {
 315   static const char* incompatible_properties[] = {
 316     "java.system.class.loader",
 317     "jdk.module.showModuleResolution",
 318     "jdk.module.validation"
 319   };
 320 
 321   for (const char* property : incompatible_properties) {
 322     if (strcmp(key, property) == 0) {
 323       stop_dumping_full_module_graph();
 324       stop_using_full_module_graph();
 325       aot_log_info(aot)("full module graph: disabled due to incompatible property: %s=%s", key, value);
 326       break;
 327     }
 328   }
 329 
 330 }
 331 
 332 // Returns any JVM command-line option, such as "--patch-module", that's not supported by CDS.
 333 static const char* find_any_unsupported_module_option() {
 334   // Note that arguments.cpp has translated the command-line options into properties. If we find an
 335   // unsupported property, translate it back to its command-line option for better error reporting.
 336 
 337   // The following properties are checked by Arguments::is_internal_module_property() and cannot be
 338   // directly specified in the command-line.
 339   static const char* unsupported_module_properties[] = {
 340     "jdk.module.limitmods",
 341     "jdk.module.upgrade.path"
 342   };
 343   static const char* unsupported_module_options[] = {
 344     "--limit-modules",
 345     "--upgrade-module-path"
 346   };
 347 
 348   assert(ARRAY_SIZE(unsupported_module_properties) == ARRAY_SIZE(unsupported_module_options), "must be");
 349   SystemProperty* sp = Arguments::system_properties();
 350   while (sp != nullptr) {
 351     for (uint i = 0; i < ARRAY_SIZE(unsupported_module_properties); i++) {
 352       if (strcmp(sp->key(), unsupported_module_properties[i]) == 0) {
 353         return unsupported_module_options[i];
 354       }
 355     }
 356     sp = sp->next();
 357   }
 358 
 359   return nullptr; // not found
 360 }
 361 
 362 void CDSConfig::check_unsupported_dumping_module_options() {
 363   assert(is_dumping_archive(), "this function is only used with CDS dump time");
 364   const char* option = find_any_unsupported_module_option();
 365   if (option != nullptr) {
 366     vm_exit_during_initialization("Cannot use the following option when dumping the shared archive", option);
 367   }
 368 
 369   if (module_patching_disables_cds()) {
 370     vm_exit_during_initialization(
 371             "Cannot use the following option when dumping the shared archive", "--patch-module");
 372   }
 373 
 374   // Check for an exploded module build in use with -Xshare:dump.
 375   if (!Arguments::has_jimage()) {
 376     vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build");
 377   }
 378 }
 379 
 380 bool CDSConfig::has_unsupported_runtime_module_options() {
 381   assert(is_using_archive(), "this function is only used with -Xshare:{on,auto}");
 382   if (ArchiveClassesAtExit != nullptr) {
 383     // dynamic dumping, just return false for now.
 384     // check_unsupported_dumping_properties() will be called later to check the same set of
 385     // properties, and will exit the VM with the correct error message if the unsupported properties
 386     // are used.
 387     return false;
 388   }
 389   const char* option = find_any_unsupported_module_option();
 390   if (option != nullptr) {
 391     if (RequireSharedSpaces) {
 392       warning("CDS is disabled when the %s option is specified.", option);
 393     } else {
 394       if (new_aot_flags_used()) {
 395         aot_log_warning(aot)("AOT cache is disabled when the %s option is specified.", option);
 396       } else {
 397         aot_log_info(aot)("CDS is disabled when the %s option is specified.", option);
 398       }
 399     }
 400     return true;
 401   }
 402 
 403   if (module_patching_disables_cds()) {
 404     if (RequireSharedSpaces) {
 405       warning("CDS is disabled when the %s option is specified.", "--patch-module");
 406     } else {
 407       log_info(cds)("CDS is disabled when the %s option is specified.", "--patch-module");
 408     }
 409     return true;
 410   }
 411 
 412   return false;
 413 }
 414 
 415 #define CHECK_NEW_FLAG(f) check_new_flag(FLAG_IS_DEFAULT(f), #f)
 416 
 417 void CDSConfig::check_new_flag(bool new_flag_is_default, const char* new_flag_name) {
 418   if (old_cds_flags_used() && !new_flag_is_default) {
 419     vm_exit_during_initialization(err_msg("Option %s cannot be used at the same time with "
 420                                           "-Xshare:on, -Xshare:auto, -Xshare:off, -Xshare:dump, "
 421                                           "DumpLoadedClassList, SharedClassListFile, or SharedArchiveFile",
 422                                           new_flag_name));
 423   }
 424 }
 425 
 426 #define CHECK_SINGLE_PATH(f) check_flag_single_path(#f, f)
 427 
 428 void CDSConfig::check_flag_single_path(const char* flag_name, const char* value) {
 429   if (value != nullptr && num_archive_paths(value) != 1) {
 430     vm_exit_during_initialization(err_msg("Option %s must specify a single file name", flag_name));
 431   }
 432 }
 433 
 434 void CDSConfig::check_aot_flags() {
 435   if (!FLAG_IS_DEFAULT(DumpLoadedClassList) ||
 436       !FLAG_IS_DEFAULT(SharedClassListFile) ||
 437       !FLAG_IS_DEFAULT(SharedArchiveFile)) {
 438     _old_cds_flags_used = true;
 439   }
 440 
 441   // "New" AOT flags must not be mixed with "classic" CDS flags such as -Xshare:dump
 442   CHECK_NEW_FLAG(AOTCache);
 443   CHECK_NEW_FLAG(AOTCacheOutput);
 444   CHECK_NEW_FLAG(AOTConfiguration);
 445   CHECK_NEW_FLAG(AOTMode);
 446 
 447   CHECK_SINGLE_PATH(AOTCache);
 448   CHECK_SINGLE_PATH(AOTCacheOutput);
 449   CHECK_SINGLE_PATH(AOTConfiguration);
 450 
 451   if (FLAG_IS_DEFAULT(AOTCache) && AOTAdapterCaching) {
 452     log_debug(aot,codecache,init)("AOTCache is not specified - AOTAdapterCaching is ignored");
 453   }
 454   if (FLAG_IS_DEFAULT(AOTCache) && AOTStubCaching) {
 455     log_debug(aot,codecache,init)("AOTCache is not specified - AOTStubCaching is ignored");
 456   }
 457 
 458   bool has_cache = !FLAG_IS_DEFAULT(AOTCache);
 459   bool has_cache_output = !FLAG_IS_DEFAULT(AOTCacheOutput);
 460   bool has_config = !FLAG_IS_DEFAULT(AOTConfiguration);
 461   bool has_mode = !FLAG_IS_DEFAULT(AOTMode);
 462 
 463   if (!has_cache && !has_cache_output && !has_config && !has_mode) {
 464     // AOT flags are not used. Use classic CDS workflow
 465     return;
 466   }
 467 
 468   if (has_cache && has_cache_output) {
 469     vm_exit_during_initialization("Only one of AOTCache or AOTCacheOutput can be specified");
 470   }
 471 
 472   if (!has_cache && (!has_mode || strcmp(AOTMode, "auto") == 0)) {
 473     if (has_cache_output) {
 474       // If AOTCacheOutput has been set, effective mode is "record".
 475       // Default value for AOTConfiguration, if necessary, will be assigned in check_aotmode_record().
 476       log_info(aot)("Selected AOTMode=record because AOTCacheOutput is specified");
 477       FLAG_SET_ERGO(AOTMode, "record");
 478     }
 479   }
 480 
 481   // At least one AOT flag has been used
 482   _new_aot_flags_used = true;
 483 
 484   if (FLAG_IS_DEFAULT(AOTMode) || strcmp(AOTMode, "auto") == 0 || strcmp(AOTMode, "on") == 0) {
 485     check_aotmode_auto_or_on();
 486   } else if (strcmp(AOTMode, "off") == 0) {
 487     check_aotmode_off();
 488   } else if (strcmp(AOTMode, "record") == 0) {
 489     check_aotmode_record();
 490   } else {
 491     assert(strcmp(AOTMode, "create") == 0, "checked by AOTModeConstraintFunc");
 492     check_aotmode_create();
 493   }
 494 
 495   // This is an old flag used by CDS regression testing only. It doesn't apply
 496   // to the AOT workflow.
 497   FLAG_SET_ERGO(AllowArchivingWithJavaAgent, false);
 498 }
 499 
 500 void CDSConfig::check_aotmode_off() {
 501   UseSharedSpaces = false;
 502   RequireSharedSpaces = false;
 503 }
 504 
 505 void CDSConfig::check_aotmode_auto_or_on() {
 506   if (!FLAG_IS_DEFAULT(AOTConfiguration)) {
 507     vm_exit_during_initialization(err_msg("AOTConfiguration can only be used with when AOTMode is record or create (selected AOTMode = %s)",
 508                                           FLAG_IS_DEFAULT(AOTMode) ? "auto" : AOTMode));
 509   }
 510 
 511   UseSharedSpaces = true;
 512   if (FLAG_IS_DEFAULT(AOTMode) || (strcmp(AOTMode, "auto") == 0)) {
 513     RequireSharedSpaces = false;
 514   } else {
 515     assert(strcmp(AOTMode, "on") == 0, "already checked");
 516     RequireSharedSpaces = true;
 517   }
 518 }
 519 
 520 // %p substitution in AOTCache, AOTCacheOutput and AOTCacheConfiguration
 521 static void substitute_aot_filename(JVMFlagsEnum flag_enum) {
 522   JVMFlag* flag = JVMFlag::flag_from_enum(flag_enum);
 523   const char* filename = flag->read<const char*>();
 524   assert(filename != nullptr, "must not have default value");
 525 
 526   // For simplicity, we don't allow %p/%t to be specified twice, because make_log_name()
 527   // substitutes only the first occurrence. Otherwise, if we run with
 528   //     java -XX:AOTCacheOutput=%p%p.aot
 529  // it will end up with both the pid of the training process and the assembly process.
 530   const char* first_p = strstr(filename, "%p");
 531   if (first_p != nullptr && strstr(first_p + 2, "%p") != nullptr) {
 532     vm_exit_during_initialization(err_msg("%s cannot contain more than one %%p", flag->name()));
 533   }
 534   const char* first_t = strstr(filename, "%t");
 535   if (first_t != nullptr && strstr(first_t + 2, "%t") != nullptr) {
 536     vm_exit_during_initialization(err_msg("%s cannot contain more than one %%t", flag->name()));
 537   }
 538 
 539   // Note: with single-command training, %p will be the pid of the training process, not the
 540   // assembly process.
 541   const char* new_filename = make_log_name(filename, nullptr);
 542   if (strcmp(filename, new_filename) != 0) {
 543     JVMFlag::Error err = JVMFlagAccess::set_ccstr(flag, &new_filename, JVMFlagOrigin::ERGONOMIC);
 544     assert(err == JVMFlag::SUCCESS, "must never fail");
 545   }
 546   FREE_C_HEAP_ARRAY(char, new_filename);
 547 }
 548 
 549 void CDSConfig::check_aotmode_record() {
 550   bool has_config = !FLAG_IS_DEFAULT(AOTConfiguration);
 551   bool has_output = !FLAG_IS_DEFAULT(AOTCacheOutput);
 552 
 553   if (!has_output && !has_config) {
 554       vm_exit_during_initialization("At least one of AOTCacheOutput and AOTConfiguration must be specified when using -XX:AOTMode=record");
 555   }
 556 
 557   if (has_output) {
 558     _is_single_command_training = true;
 559     substitute_aot_filename(FLAG_MEMBER_ENUM(AOTCacheOutput));
 560     if (!has_config) {
 561       // Too early; can't use resource allocation yet.
 562       size_t len = strlen(AOTCacheOutput) + 10;
 563       char* temp = AllocateHeap(len, mtArguments);
 564       jio_snprintf(temp, len, "%s.config", AOTCacheOutput);
 565       FLAG_SET_ERGO(AOTConfiguration, temp);
 566       FreeHeap(temp);
 567       _has_temp_aot_config_file = true;
 568     }
 569   }
 570 
 571   if (!FLAG_IS_DEFAULT(AOTCache)) {
 572     vm_exit_during_initialization("AOTCache must not be specified when using -XX:AOTMode=record");
 573   }
 574 
 575   substitute_aot_filename(FLAG_MEMBER_ENUM(AOTConfiguration));
 576 
 577   UseSharedSpaces = false;
 578   RequireSharedSpaces = false;
 579   _is_dumping_static_archive = true;
 580   _is_dumping_preimage_static_archive = true;
 581 
 582   // At VM exit, the module graph may be contaminated with program states.
 583   // We will rebuild the module graph when dumping the CDS final image.
 584   disable_heap_dumping();
 585 }
 586 
 587 void CDSConfig::check_aotmode_create() {
 588   if (FLAG_IS_DEFAULT(AOTConfiguration)) {
 589     vm_exit_during_initialization("AOTConfiguration must be specified when using -XX:AOTMode=create");
 590   }
 591 
 592   bool has_cache = !FLAG_IS_DEFAULT(AOTCache);
 593   bool has_cache_output = !FLAG_IS_DEFAULT(AOTCacheOutput);
 594 
 595   assert(!(has_cache && has_cache_output), "already checked");
 596 
 597   if (!has_cache && !has_cache_output) {
 598     vm_exit_during_initialization("AOTCache or AOTCacheOutput must be specified when using -XX:AOTMode=create");
 599   }
 600 
 601   if (!has_cache) {
 602     precond(has_cache_output);
 603     FLAG_SET_ERGO(AOTCache, AOTCacheOutput);
 604   }
 605   // No need to check for (!has_cache_output), as we don't look at AOTCacheOutput after here.
 606 
 607   substitute_aot_filename(FLAG_MEMBER_ENUM(AOTCache));
 608 
 609   _is_dumping_final_static_archive = true;
 610   UseSharedSpaces = true;
 611   RequireSharedSpaces = true;
 612 
 613   if (!FileMapInfo::is_preimage_static_archive(AOTConfiguration)) {
 614     vm_exit_during_initialization("Must be a valid AOT configuration generated by the current JVM", AOTConfiguration);
 615   }
 616 
 617   CDSConfig::enable_dumping_static_archive();
 618 
 619   // We don't load any agents in the assembly phase, so we can ensure that the agents
 620   // cannot affect the contents of the AOT cache. E.g., we don't want the agents to
 621   // redefine any cached classes. We also don't want the agents to modify heap objects that
 622   // are cached.
 623   //
 624   // Since application is not executed in the assembly phase, there's no need to load
 625   // the agents anyway -- no one will notice that the agents are not loaded.
 626   log_info(aot)("Disabled all JVMTI agents during -XX:AOTMode=create");
 627   JvmtiAgentList::disable_agent_list();
 628 }
 629 
 630 void CDSConfig::ergo_init_aot_paths() {
 631   assert(_cds_ergo_initialize_started, "sanity");
 632   if (is_dumping_static_archive()) {
 633     if (is_dumping_preimage_static_archive()) {
 634       _output_archive_path = AOTConfiguration;
 635     } else {
 636       assert(is_dumping_final_static_archive(), "must be");
 637       _input_static_archive_path = AOTConfiguration;
 638       _output_archive_path = AOTCache;
 639     }
 640   } else if (is_using_archive()) {
 641     if (FLAG_IS_DEFAULT(AOTCache)) {
 642       // Only -XX:AOTMode={auto,on} is specified
 643       _input_static_archive_path = default_archive_path();
 644     } else {
 645       _input_static_archive_path = AOTCache;
 646     }
 647   }
 648 }
 649 
 650 bool CDSConfig::check_vm_args_consistency(bool mode_flag_cmd_line) {
 651   assert(!_cds_ergo_initialize_started, "This is called earlier than CDSConfig::ergo_initialize()");
 652 
 653   check_aot_flags();
 654 
 655   if (!FLAG_IS_DEFAULT(AOTMode)) {
 656     // Using any form of the new AOTMode switch enables enhanced optimizations.
 657     FLAG_SET_ERGO_IF_DEFAULT(AOTClassLinking, true);
 658   }
 659 
 660   setup_compiler_args();
 661 
 662   if (AOTClassLinking) {
 663     // If AOTClassLinking is specified, enable all AOT optimizations by default.
 664     FLAG_SET_ERGO_IF_DEFAULT(AOTInvokeDynamicLinking, true);
 665   } else {
 666     // AOTInvokeDynamicLinking depends on AOTClassLinking.
 667     FLAG_SET_ERGO(AOTInvokeDynamicLinking, false);
 668   }
 669 
 670   if (is_dumping_static_archive()) {
 671     if (is_dumping_preimage_static_archive()) {
 672       // Don't tweak execution mode during AOT training run
 673     } else if (is_dumping_final_static_archive()) {
 674       if (Arguments::mode() == Arguments::_comp) {
 675         // AOT assembly phase submits the non-blocking compilation requests
 676         // for methods collected during training run, then waits for all compilations
 677         // to complete. With -Xcomp, we block for each compilation request, which is
 678         // counter-productive. Switching back to mixed mode improves testing time
 679         // with AOT and -Xcomp.
 680         Arguments::set_mode_flags(Arguments::_mixed);
 681       }
 682     } else if (!mode_flag_cmd_line) {
 683       // By default, -Xshare:dump runs in interpreter-only mode, which is required for deterministic archive.
 684       //
 685       // If your classlist is large and you don't care about deterministic dumping, you can use
 686       // -Xshare:dump -Xmixed to improve dumping speed.
 687       Arguments::set_mode_flags(Arguments::_int);
 688     } else if (Arguments::mode() == Arguments::_comp) {
 689       // -Xcomp may use excessive CPU for the test tiers. Also, -Xshare:dump runs a small and fixed set of
 690       // Java code, so there's not much benefit in running -Xcomp.
 691       aot_log_info(aot)("reduced -Xcomp to -Xmixed for static dumping");
 692       Arguments::set_mode_flags(Arguments::_mixed);
 693     }
 694 
 695     // String deduplication may cause CDS to iterate the strings in different order from one
 696     // run to another which resulting in non-determinstic CDS archives.
 697     // Disable UseStringDeduplication while dumping CDS archive.
 698     UseStringDeduplication = false;
 699   }
 700 
 701   // RecordDynamicDumpInfo is not compatible with ArchiveClassesAtExit
 702   if (ArchiveClassesAtExit != nullptr && RecordDynamicDumpInfo) {
 703     jio_fprintf(defaultStream::output_stream(),
 704                 "-XX:+RecordDynamicDumpInfo cannot be used with -XX:ArchiveClassesAtExit.\n");
 705     return false;
 706   }
 707 
 708   if (ArchiveClassesAtExit == nullptr && !RecordDynamicDumpInfo) {
 709     disable_dumping_dynamic_archive();
 710   } else {
 711     enable_dumping_dynamic_archive(ArchiveClassesAtExit);
 712   }
 713 
 714   if (AutoCreateSharedArchive) {
 715     if (SharedArchiveFile == nullptr) {
 716       aot_log_warning(aot)("-XX:+AutoCreateSharedArchive requires -XX:SharedArchiveFile");
 717       return false;
 718     }
 719     if (ArchiveClassesAtExit != nullptr) {
 720       aot_log_warning(aot)("-XX:+AutoCreateSharedArchive does not work with ArchiveClassesAtExit");
 721       return false;
 722     }
 723   }
 724 
 725   if (is_using_archive() && java_base_module_patching_disables_cds() && module_patching_disables_cds()) {
 726     Arguments::no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched.");
 727   }
 728   if (is_using_archive() && has_unsupported_runtime_module_options()) {
 729     UseSharedSpaces = false;
 730   }
 731 
 732   if (is_dumping_archive()) {
 733     // Always verify non-system classes during CDS dump
 734     if (!BytecodeVerificationRemote) {
 735       BytecodeVerificationRemote = true;
 736       aot_log_info(aot)("All non-system classes will be verified (-Xverify:remote) during CDS dump time.");
 737     }
 738   }
 739 
 740   if (is_dumping_classic_static_archive() && AOTClassLinking) {
 741     if (JvmtiAgentList::disable_agent_list()) {
 742       FLAG_SET_ERGO(AllowArchivingWithJavaAgent, false);
 743       log_warning(cds)("Disabled all JVMTI agents with -Xshare:dump -XX:+AOTClassLinking");
 744     }
 745   }
 746 
 747   return true;
 748 }
 749 
 750 void CDSConfig::setup_compiler_args() {
 751   // AOT profiles and AOT-compiled code are supported only in the JEP 483 workflow.
 752   bool can_dump_profile_and_compiled_code = AOTClassLinking && new_aot_flags_used();
 753 
 754   if (is_dumping_preimage_static_archive() && can_dump_profile_and_compiled_code) {
 755     // JEP 483 workflow -- training
 756     FLAG_SET_ERGO_IF_DEFAULT(AOTRecordTraining, true);
 757     FLAG_SET_ERGO(AOTReplayTraining, false);
 758     AOTCodeCache::disable_caching(); // No AOT code generation during training run
 759   } else if (is_dumping_final_static_archive() && can_dump_profile_and_compiled_code) {
 760     // JEP 483 workflow -- assembly
 761     FLAG_SET_ERGO(AOTRecordTraining, false);
 762     FLAG_SET_ERGO_IF_DEFAULT(AOTReplayTraining, true);
 763     AOTCodeCache::enable_caching(); // Generate AOT code during assembly phase.
 764     disable_dumping_aot_code();     // Don't dump AOT code until metadata and heap are dumped.
 765   } else if (is_using_archive() && new_aot_flags_used()) {
 766     // JEP 483 workflow -- production
 767     FLAG_SET_ERGO(AOTRecordTraining, false);
 768     FLAG_SET_ERGO_IF_DEFAULT(AOTReplayTraining, true);
 769     AOTCodeCache::enable_caching();
 770   } else {
 771     FLAG_SET_ERGO(AOTReplayTraining, false);
 772     FLAG_SET_ERGO(AOTRecordTraining, false);
 773     AOTCodeCache::disable_caching();
 774   }
 775 }
 776 
 777 void CDSConfig::prepare_for_dumping() {
 778   assert(CDSConfig::is_dumping_archive(), "sanity");
 779 
 780   if (is_dumping_dynamic_archive() && AOTClassLinking) {
 781     if (FLAG_IS_CMDLINE(AOTClassLinking)) {
 782       log_warning(cds)("AOTClassLinking is not supported for dynamic CDS archive");
 783     }
 784     FLAG_SET_ERGO(AOTClassLinking, false);
 785   }
 786 
 787   if (is_dumping_dynamic_archive() && !is_using_archive()) {
 788     assert(!is_dumping_static_archive(), "cannot be dumping both static and dynamic archives");
 789 
 790     // This could happen if SharedArchiveFile has failed to load:
 791     // - -Xshare:off was specified
 792     // - SharedArchiveFile points to an non-existent file.
 793     // - SharedArchiveFile points to an archive that has failed CRC check
 794     // - SharedArchiveFile is not specified and the VM doesn't have a compatible default archive
 795 
 796 #define __THEMSG " is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info."
 797     if (RecordDynamicDumpInfo) {
 798       aot_log_error(aot)("-XX:+RecordDynamicDumpInfo%s", __THEMSG);
 799       AOTMetaspace::unrecoverable_loading_error();
 800     } else {
 801       assert(ArchiveClassesAtExit != nullptr, "sanity");
 802       aot_log_warning(aot)("-XX:ArchiveClassesAtExit" __THEMSG);
 803     }
 804 #undef __THEMSG
 805     disable_dumping_dynamic_archive();
 806     return;
 807   }
 808 
 809   check_unsupported_dumping_module_options();
 810 }
 811 
 812 bool CDSConfig::is_dumping_classic_static_archive() {
 813   return _is_dumping_static_archive &&
 814     !is_dumping_preimage_static_archive() &&
 815     !is_dumping_final_static_archive();
 816 }
 817 
 818 bool CDSConfig::is_dumping_preimage_static_archive() {
 819   return _is_dumping_preimage_static_archive;
 820 }
 821 
 822 bool CDSConfig::is_dumping_final_static_archive() {
 823   return _is_dumping_final_static_archive;
 824 }
 825 
 826 void CDSConfig::enable_dumping_dynamic_archive(const char* output_path) {
 827   _is_dumping_dynamic_archive = true;
 828   if (output_path == nullptr) {
 829     // output_path can be null when the VM is started with -XX:+RecordDynamicDumpInfo
 830     // in anticipation of "jcmd VM.cds dynamic_dump", which will provide the actual
 831     // output path.
 832     _output_archive_path = nullptr;
 833   } else {
 834     _output_archive_path = os::strdup_check_oom(output_path, mtArguments);
 835   }
 836 }
 837 
 838 bool CDSConfig::allow_only_single_java_thread() {
 839   // See comments in JVM_StartThread()
 840   return is_dumping_classic_static_archive() || is_dumping_final_static_archive();
 841 }
 842 
 843 bool CDSConfig::is_using_archive() {
 844   return UseSharedSpaces;
 845 }
 846 
 847 bool CDSConfig::is_using_only_default_archive() {
 848   return is_using_archive() &&
 849          input_static_archive_path() != nullptr &&
 850          default_archive_path() != nullptr &&
 851          strcmp(input_static_archive_path(), default_archive_path()) == 0 &&
 852          input_dynamic_archive_path() == nullptr;
 853 }
 854 
 855 bool CDSConfig::is_logging_lambda_form_invokers() {
 856   return ClassListWriter::is_enabled() || is_dumping_dynamic_archive();
 857 }
 858 
 859 bool CDSConfig::is_dumping_regenerated_lambdaform_invokers() {
 860   if (is_dumping_final_static_archive()) {
 861     // No need to regenerate -- the lambda form invokers should have been regenerated
 862     // in the preimage archive (if allowed)
 863     return false;
 864   } else if (is_dumping_dynamic_archive() && is_using_aot_linked_classes()) {
 865     // The base archive has aot-linked classes that may have AOT-resolved CP references
 866     // that point to the lambda form invokers in the base archive. Such pointers will
 867     // be invalid if lambda form invokers are regenerated in the dynamic archive.
 868     return false;
 869   } else {
 870     return is_dumping_archive();
 871   }
 872 }
 873 
 874 void CDSConfig::stop_using_optimized_module_handling() {
 875   _is_using_optimized_module_handling = false;
 876   _is_dumping_full_module_graph = false; // This requires is_using_optimized_module_handling()
 877   _is_using_full_module_graph = false; // This requires is_using_optimized_module_handling()
 878 }
 879 
 880 
 881 CDSConfig::DumperThreadMark::DumperThreadMark(JavaThread* current) {
 882   assert(_dumper_thread == nullptr, "sanity");
 883   _dumper_thread = current;
 884 }
 885 
 886 CDSConfig::DumperThreadMark::~DumperThreadMark() {
 887   assert(_dumper_thread != nullptr, "sanity");
 888   _dumper_thread = nullptr;
 889 }
 890 
 891 bool CDSConfig::current_thread_is_vm_or_dumper() {
 892   Thread* t = Thread::current();
 893   return t->is_VM_thread() || t == _dumper_thread;
 894 }
 895 
 896 bool CDSConfig::current_thread_is_dumper() {
 897   return Thread::current() == _dumper_thread;
 898 }
 899 
 900 const char* CDSConfig::type_of_archive_being_loaded() {
 901   if (is_dumping_final_static_archive()) {
 902     return "AOT configuration file";
 903   } else if (new_aot_flags_used()) {
 904     return "AOT cache";
 905   } else {
 906     return "shared archive file";
 907   }
 908 }
 909 
 910 const char* CDSConfig::type_of_archive_being_written() {
 911   if (is_dumping_preimage_static_archive()) {
 912     return "AOT configuration file";
 913   } else if (new_aot_flags_used()) {
 914     return "AOT cache";
 915   } else {
 916     return "shared archive file";
 917   }
 918 }
 919 
 920 // If an incompatible VM options is found, return a text message that explains why
 921 static const char* check_options_incompatible_with_dumping_heap() {
 922 #if INCLUDE_CDS_JAVA_HEAP
 923   if (!UseCompressedClassPointers) {
 924     return "UseCompressedClassPointers must be true";
 925   }
 926 
 927   // Almost all GCs support heap region dump, except ZGC (so far).
 928   if (UseZGC) {
 929     return "ZGC is not supported";
 930   }
 931 
 932   return nullptr;
 933 #else
 934   return "JVM not configured for writing Java heap objects";
 935 #endif
 936 }
 937 
 938 void CDSConfig::log_reasons_for_not_dumping_heap() {
 939   const char* reason;
 940 
 941   assert(!is_dumping_heap(), "sanity");
 942 
 943   if (_disable_heap_dumping) {
 944     reason = "Programmatically disabled";
 945   } else {
 946     reason = check_options_incompatible_with_dumping_heap();
 947   }
 948 
 949   assert(reason != nullptr, "sanity");
 950   aot_log_info(aot)("Archived java heap is not supported: %s", reason);
 951 }
 952 
 953 // This is *Legacy* optimization for lambdas before JEP 483. May be removed in the future.
 954 bool CDSConfig::is_dumping_lambdas_in_legacy_mode() {
 955   return !is_dumping_method_handles();
 956 }
 957 
 958 bool CDSConfig::is_preserving_verification_constraints() {
 959   // Verification dependencies are classes used in assignability checks by the
 960   // bytecode verifier. In the following example, the verification dependencies
 961   // for X are A and B.
 962   //
 963   //     class X {
 964   //        A getA() { return new B(); }
 965   //     }
 966   //
 967   // With the AOT cache, we can ensure that all the verification dependencies
 968   // (A and B in the above example) are unconditionally loaded during the bootstrap
 969   // of the production run. This means that if a class was successfully verified
 970   // in the assembly phase, all of the verifier's assignability checks will remain
 971   // valid in the production run, so we don't need to verify aot-linked classes again.
 972 
 973   if (is_dumping_preimage_static_archive()) { // writing AOT config
 974     return AOTClassLinking;
 975   } else if (is_dumping_final_static_archive()) { // writing AOT cache
 976     return is_dumping_aot_linked_classes();
 977   } else {
 978     // For simplicity, we don't support this optimization with the old CDS workflow.
 979     return false;
 980   }
 981 }
 982 
 983 bool CDSConfig::is_old_class_for_verifier(const InstanceKlass* ik) {
 984   return ik->major_version() < 50 /*JAVA_6_VERSION*/;
 985 }
 986 
 987 #if INCLUDE_CDS_JAVA_HEAP
 988 bool CDSConfig::are_vm_options_incompatible_with_dumping_heap() {
 989   return check_options_incompatible_with_dumping_heap() != nullptr;
 990 }
 991 
 992 bool CDSConfig::is_dumping_heap() {
 993   if (is_valhalla_preview()) {
 994     // Not working yet -- e.g., HeapShared::oop_hash() needs to be implemented for value oops
 995     return false;
 996   }
 997   if (!(is_dumping_classic_static_archive() || is_dumping_final_static_archive())
 998       || are_vm_options_incompatible_with_dumping_heap()
 999       || _disable_heap_dumping) {
1000     return false;
1001   }
1002   return true;
1003 }
1004 
1005 bool CDSConfig::is_loading_heap() {
1006   return ArchiveHeapLoader::is_in_use();
1007 }
1008 
1009 bool CDSConfig::is_using_full_module_graph() {
1010   if (ClassLoaderDataShared::is_full_module_graph_loaded()) {
1011     return true;
1012   }
1013 
1014   if (!_is_using_full_module_graph) {
1015     return false;
1016   }
1017 
1018   if (is_using_archive() && ArchiveHeapLoader::can_use()) {
1019     // Classes used by the archived full module graph are loaded in JVMTI early phase.
1020     assert(!(JvmtiExport::should_post_class_file_load_hook() && JvmtiExport::has_early_class_hook_env()),
1021            "CDS should be disabled if early class hooks are enabled");
1022     return true;
1023   } else {
1024     _is_using_full_module_graph = false;
1025     return false;
1026   }
1027 }
1028 
1029 void CDSConfig::stop_dumping_full_module_graph(const char* reason) {
1030   if (_is_dumping_full_module_graph) {
1031     _is_dumping_full_module_graph = false;
1032     if (reason != nullptr) {
1033       aot_log_info(aot)("full module graph cannot be dumped: %s", reason);
1034     }
1035   }
1036 }
1037 
1038 void CDSConfig::stop_using_full_module_graph(const char* reason) {
1039   assert(!ClassLoaderDataShared::is_full_module_graph_loaded(), "you call this function too late!");
1040   if (_is_using_full_module_graph) {
1041     _is_using_full_module_graph = false;
1042     if (reason != nullptr) {
1043       aot_log_info(aot)("full module graph cannot be loaded: %s", reason);
1044     }
1045   }
1046 }
1047 
1048 bool CDSConfig::is_dumping_aot_linked_classes() {
1049   if (is_dumping_classic_static_archive() || is_dumping_final_static_archive()) {
1050     // FMG is required to guarantee that all cached boot/platform/app classes
1051     // are visible in the production run, so they can be unconditionally
1052     // loaded during VM bootstrap.
1053     return is_dumping_full_module_graph() && AOTClassLinking;
1054   } else {
1055     return false;
1056   }
1057 }
1058 
1059 bool CDSConfig::is_using_aot_linked_classes() {
1060   // Make sure we have the exact same module graph as in the assembly phase, or else
1061   // some aot-linked classes may not be visible so cannot be loaded.
1062   return is_using_full_module_graph() && _has_aot_linked_classes;
1063 }
1064 
1065 void CDSConfig::set_has_aot_linked_classes(bool has_aot_linked_classes) {
1066   _has_aot_linked_classes |= has_aot_linked_classes;
1067 }
1068 
1069 bool CDSConfig::is_initing_classes_at_dump_time() {
1070   return is_dumping_heap() && is_dumping_aot_linked_classes();
1071 }
1072 
1073 bool CDSConfig::is_dumping_invokedynamic() {
1074   // Requires is_dumping_aot_linked_classes(). Otherwise the classes of some archived heap
1075   // objects used by the archive indy callsites may be replaced at runtime.
1076   return AOTInvokeDynamicLinking && is_dumping_aot_linked_classes() && is_dumping_heap();
1077 }
1078 
1079 // When we are dumping aot-linked classes and we are able to write archived heap objects, we automatically
1080 // enable the archiving of MethodHandles. This will in turn enable the archiving of MethodTypes and hidden
1081 // classes that are used in the implementation of MethodHandles.
1082 // Archived MethodHandles are required for higher-level optimizations such as AOT resolution of invokedynamic
1083 // and dynamic proxies.
1084 bool CDSConfig::is_dumping_method_handles() {
1085   return is_initing_classes_at_dump_time();
1086 }
1087 
1088 #endif // INCLUDE_CDS_JAVA_HEAP
1089 
1090 // AOT code generation and its archiving is disabled by default.
1091 // We enable it only in the final image dump after the metadata and heap are dumped.
1092 // This affects only JITed code because it may have embedded oops and metadata pointers
1093 // which AOT code encodes as offsets in final CDS archive regions.
1094 
1095 static bool _is_dumping_aot_code = false;
1096 
1097 bool CDSConfig::is_dumping_aot_code() {
1098   return _is_dumping_aot_code;
1099 }
1100 
1101 void CDSConfig::disable_dumping_aot_code() {
1102   _is_dumping_aot_code = false;
1103 }
1104 
1105 void CDSConfig::enable_dumping_aot_code() {
1106   _is_dumping_aot_code = true;
1107 }
1108 
1109 bool CDSConfig::is_dumping_adapters() {
1110   return (AOTAdapterCaching && is_dumping_final_static_archive());
1111 }