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/archiveHeapLoader.hpp" 27 #include "cds/cdsConfig.hpp" 28 #include "cds/cds_globals.hpp" 29 #include "cds/classListWriter.hpp" 30 #include "cds/filemap.hpp" 31 #include "cds/heapShared.hpp" 32 #include "cds/metaspaceShared.hpp" 33 #include "classfile/classLoaderDataShared.hpp" 34 #include "classfile/moduleEntry.hpp" 35 #include "classfile/systemDictionaryShared.hpp" 36 #include "code/aotCodeCache.hpp" 37 #include "compiler/compilerDefinitions.inline.hpp" 38 #include "include/jvm_io.h" 39 #include "logging/log.hpp" 40 #include "prims/jvmtiExport.hpp" 41 #include "memory/universe.hpp" 42 #include "prims/jvmtiAgentList.hpp" 43 #include "runtime/arguments.hpp" 44 #include "runtime/globals_extension.hpp" 45 #include "runtime/java.hpp" 46 #include "runtime/vmThread.hpp" 47 #include "utilities/defaultStream.hpp" 48 #include "utilities/formatBuffer.hpp" 49 50 bool CDSConfig::_is_dumping_static_archive = false; 51 bool CDSConfig::_is_dumping_preimage_static_archive = false; 52 bool CDSConfig::_is_dumping_final_static_archive = false; 53 bool CDSConfig::_is_dumping_dynamic_archive = false; 54 bool CDSConfig::_is_using_optimized_module_handling = true; 55 bool CDSConfig::_is_dumping_full_module_graph = true; 56 bool CDSConfig::_is_using_full_module_graph = true; 57 bool CDSConfig::_has_aot_linked_classes = false; 58 bool CDSConfig::_is_single_command_training = false; 59 bool CDSConfig::_has_temp_aot_config_file = false; 60 bool CDSConfig::_is_loading_packages = false; 61 bool CDSConfig::_is_loading_protection_domains = false; 62 bool CDSConfig::_is_security_manager_allowed = false; 63 bool CDSConfig::_old_cds_flags_used = false; 64 bool CDSConfig::_new_aot_flags_used = false; 65 bool CDSConfig::_disable_heap_dumping = false; 66 67 const char* CDSConfig::_default_archive_path = nullptr; 68 const char* CDSConfig::_input_static_archive_path = nullptr; 69 const char* CDSConfig::_input_dynamic_archive_path = nullptr; 70 const char* CDSConfig::_output_archive_path = nullptr; 71 72 JavaThread* CDSConfig::_dumper_thread = nullptr; 73 74 int CDSConfig::get_status() { 75 assert(Universe::is_fully_initialized(), "status is finalized only after Universe is initialized"); 76 return (is_dumping_archive() ? IS_DUMPING_ARCHIVE : 0) | 77 (is_dumping_method_handles() ? IS_DUMPING_METHOD_HANDLES : 0) | 78 (is_dumping_static_archive() ? IS_DUMPING_STATIC_ARCHIVE : 0) | 79 (is_logging_lambda_form_invokers() ? IS_LOGGING_LAMBDA_FORM_INVOKERS : 0) | 80 (is_using_archive() ? IS_USING_ARCHIVE : 0) | 81 (is_dumping_heap() ? IS_DUMPING_HEAP : 0) | 82 (is_logging_dynamic_proxies() ? IS_LOGGING_DYNAMIC_PROXIES : 0) | 83 (is_dumping_packages() ? IS_DUMPING_PACKAGES : 0) | 84 (is_dumping_protection_domains() ? IS_DUMPING_PROTECTION_DOMAINS : 0); 85 } 86 87 DEBUG_ONLY(static bool _cds_ergo_initialize_started = false); 88 89 void CDSConfig::ergo_initialize() { 90 DEBUG_ONLY(_cds_ergo_initialize_started = true); 91 92 if (is_dumping_static_archive() && !is_dumping_final_static_archive()) { 93 // Note: -Xshare and -XX:AOTMode flags are mutually exclusive. 94 // - Classic workflow: -Xshare:on and -Xshare:dump cannot take effect at the same time. 95 // - JEP 483 workflow: -XX:AOTMode:record and -XX:AOTMode=on cannot take effect at the same time. 96 // So we can never come to here with RequireSharedSpaces==true. 97 assert(!RequireSharedSpaces, "sanity"); 98 99 // If dumping the classic archive, or making an AOT training run (dumping a preimage archive), 100 // for sanity, parse all classes from classfiles. 101 // TODO: in the future, if we want to support re-training on top of an existing AOT cache, this 102 // needs to be changed. 103 UseSharedSpaces = false; 104 } 105 106 // Initialize shared archive paths which could include both base and dynamic archive paths 107 // This must be after set_ergonomics_flags() called so flag UseCompressedOops is set properly. 108 if (is_dumping_static_archive() || is_using_archive()) { 109 if (new_aot_flags_used()) { 110 ergo_init_aot_paths(); 111 } else { 112 ergo_init_classic_archive_paths(); 113 } 114 } 115 116 if (!is_dumping_heap()) { 117 _is_dumping_full_module_graph = false; 118 } 119 120 #ifdef _LP64 121 // 122 // By default, when using AOTClassLinking, use the CompressedOops::HeapBasedNarrowOop 123 // mode so that AOT code can be always work regardless of runtime heap range. 124 // 125 // If you are *absolutely sure* that the CompressedOops::mode() will be the same 126 // between training and production runs (e.g., if you specify -Xmx128m for 127 // both training and production runs, and you know the OS will always reserve 128 // the heap under 4GB), you can explicitly disable this with: 129 // java -XX:+UnlockDiagnosticVMOptions -XX:-UseCompatibleCompressedOops ... 130 // However, this is risky and there's a chance that the production run will be slower 131 // than expected because it is unable to load the AOT code cache. 132 // 133 if (UseCompressedOops && AOTCodeCache::is_caching_enabled()) { 134 FLAG_SET_ERGO_IF_DEFAULT(UseCompatibleCompressedOops, true); 135 } else if (!FLAG_IS_DEFAULT(UseCompatibleCompressedOops)) { 136 FLAG_SET_ERGO(UseCompatibleCompressedOops, false); 137 } 138 #endif // _LP64 139 } 140 141 const char* CDSConfig::default_archive_path() { 142 // The path depends on UseCompressedOops, etc, which are set by GC ergonomics just 143 // before CDSConfig::ergo_initialize() is called. 144 assert(_cds_ergo_initialize_started, "sanity"); 145 if (_default_archive_path == nullptr) { 146 char jvm_path[JVM_MAXPATHLEN]; 147 os::jvm_path(jvm_path, sizeof(jvm_path)); 148 char *end = strrchr(jvm_path, *os::file_separator()); 149 if (end != nullptr) *end = '\0'; 150 stringStream tmp; 151 tmp.print("%s%sclasses", jvm_path, os::file_separator()); 152 #ifdef _LP64 153 if (!UseCompressedOops) { 154 tmp.print_raw("_nocoops"); 155 } 156 if (UseCompactObjectHeaders) { 157 // Note that generation of xxx_coh.jsa variants require 158 // --enable-cds-archive-coh at build time 159 tmp.print_raw("_coh"); 160 } 161 #endif 162 tmp.print_raw(".jsa"); 163 _default_archive_path = os::strdup(tmp.base()); 164 } 165 return _default_archive_path; 166 } 167 168 int CDSConfig::num_archive_paths(const char* path_spec) { 169 if (path_spec == nullptr) { 170 return 0; 171 } 172 int npaths = 1; 173 char* p = (char*)path_spec; 174 while (*p != '\0') { 175 if (*p == os::path_separator()[0]) { 176 npaths++; 177 } 178 p++; 179 } 180 return npaths; 181 } 182 183 void CDSConfig::extract_archive_paths(const char* archive_path, 184 const char** base_archive_path, 185 const char** top_archive_path) { 186 char* begin_ptr = (char*)archive_path; 187 char* end_ptr = strchr((char*)archive_path, os::path_separator()[0]); 188 if (end_ptr == nullptr || end_ptr == begin_ptr) { 189 vm_exit_during_initialization("Base archive was not specified", archive_path); 190 } 191 size_t len = end_ptr - begin_ptr; 192 char* cur_path = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); 193 strncpy(cur_path, begin_ptr, len); 194 cur_path[len] = '\0'; 195 *base_archive_path = cur_path; 196 197 begin_ptr = ++end_ptr; 198 if (*begin_ptr == '\0') { 199 vm_exit_during_initialization("Top archive was not specified", archive_path); 200 } 201 end_ptr = strchr(begin_ptr, '\0'); 202 assert(end_ptr != nullptr, "sanity"); 203 len = end_ptr - begin_ptr; 204 cur_path = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); 205 strncpy(cur_path, begin_ptr, len + 1); 206 *top_archive_path = cur_path; 207 } 208 209 void CDSConfig::ergo_init_classic_archive_paths() { 210 assert(_cds_ergo_initialize_started, "sanity"); 211 if (ArchiveClassesAtExit != nullptr) { 212 assert(!RecordDynamicDumpInfo, "already checked"); 213 if (is_dumping_static_archive()) { 214 vm_exit_during_initialization("-XX:ArchiveClassesAtExit cannot be used with -Xshare:dump"); 215 } 216 check_unsupported_dumping_module_options(); 217 218 if (os::same_files(default_archive_path(), ArchiveClassesAtExit)) { 219 vm_exit_during_initialization( 220 "Cannot specify the default CDS archive for -XX:ArchiveClassesAtExit", default_archive_path()); 221 } 222 } 223 224 if (SharedArchiveFile == nullptr) { 225 _input_static_archive_path = default_archive_path(); 226 if (is_dumping_static_archive()) { 227 _output_archive_path = _input_static_archive_path; 228 } 229 } else { 230 int num_archives = num_archive_paths(SharedArchiveFile); 231 assert(num_archives > 0, "must be"); 232 233 if (is_dumping_archive() && num_archives > 1) { 234 vm_exit_during_initialization( 235 "Cannot have more than 1 archive file specified in -XX:SharedArchiveFile during CDS dumping"); 236 } 237 238 if (is_dumping_static_archive()) { 239 assert(num_archives == 1, "just checked above"); 240 // Static dump is simple: only one archive is allowed in SharedArchiveFile. This file 241 // will be overwritten regardless of its contents 242 _output_archive_path = SharedArchiveFile; 243 } else { 244 // SharedArchiveFile may specify one or two files. In case (c), the path for base.jsa 245 // is read from top.jsa 246 // (a) 1 file: -XX:SharedArchiveFile=base.jsa 247 // (b) 2 files: -XX:SharedArchiveFile=base.jsa:top.jsa 248 // (c) 2 files: -XX:SharedArchiveFile=top.jsa 249 // 250 // However, if either RecordDynamicDumpInfo or ArchiveClassesAtExit is used, we do not 251 // allow cases (b) and (c). Case (b) is already checked above. 252 253 if (num_archives > 2) { 254 vm_exit_during_initialization( 255 "Cannot have more than 2 archive files specified in the -XX:SharedArchiveFile option"); 256 } 257 258 if (num_archives == 1) { 259 const char* base_archive_path = nullptr; 260 bool success = 261 FileMapInfo::get_base_archive_name_from_header(SharedArchiveFile, &base_archive_path); 262 if (!success) { 263 // If +AutoCreateSharedArchive and the specified shared archive does not exist, 264 // regenerate the dynamic archive base on default archive. 265 if (AutoCreateSharedArchive && !os::file_exists(SharedArchiveFile)) { 266 enable_dumping_dynamic_archive(SharedArchiveFile); 267 FLAG_SET_ERGO(ArchiveClassesAtExit, SharedArchiveFile); 268 _input_static_archive_path = default_archive_path(); 269 FLAG_SET_ERGO(SharedArchiveFile, nullptr); 270 } else { 271 if (AutoCreateSharedArchive) { 272 warning("-XX:+AutoCreateSharedArchive is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info."); 273 AutoCreateSharedArchive = false; 274 } 275 aot_log_error(aot)("Not a valid %s (%s)", type_of_archive_being_loaded(), SharedArchiveFile); 276 Arguments::no_shared_spaces("invalid archive"); 277 } 278 } else if (base_archive_path == nullptr) { 279 // User has specified a single archive, which is a static archive. 280 _input_static_archive_path = SharedArchiveFile; 281 } else { 282 // User has specified a single archive, which is a dynamic archive. 283 _input_dynamic_archive_path = SharedArchiveFile; 284 _input_static_archive_path = base_archive_path; // has been c-heap allocated. 285 } 286 } else { 287 extract_archive_paths(SharedArchiveFile, 288 &_input_static_archive_path, &_input_dynamic_archive_path); 289 if (_input_static_archive_path == nullptr) { 290 assert(_input_dynamic_archive_path == nullptr, "must be"); 291 Arguments::no_shared_spaces("invalid archive"); 292 } 293 } 294 295 if (_input_dynamic_archive_path != nullptr) { 296 // Check for case (c) 297 if (RecordDynamicDumpInfo) { 298 vm_exit_during_initialization("-XX:+RecordDynamicDumpInfo is unsupported when a dynamic CDS archive is specified in -XX:SharedArchiveFile", 299 SharedArchiveFile); 300 } 301 if (ArchiveClassesAtExit != nullptr) { 302 vm_exit_during_initialization("-XX:ArchiveClassesAtExit is unsupported when a dynamic CDS archive is specified in -XX:SharedArchiveFile", 303 SharedArchiveFile); 304 } 305 } 306 307 if (ArchiveClassesAtExit != nullptr && os::same_files(SharedArchiveFile, ArchiveClassesAtExit)) { 308 vm_exit_during_initialization( 309 "Cannot have the same archive file specified for -XX:SharedArchiveFile and -XX:ArchiveClassesAtExit", 310 SharedArchiveFile); 311 } 312 } 313 } 314 } 315 316 static char* bad_module_prop_key = nullptr; 317 static char* bad_module_prop_value = nullptr; 318 319 void CDSConfig::check_internal_module_property(const char* key, const char* value) { 320 if (Arguments::is_incompatible_cds_internal_module_property(key)) { 321 stop_using_optimized_module_handling(); 322 if (bad_module_prop_key == nullptr) { 323 // We don't want to print an unconditional warning here, as we are still processing the command line. 324 // A later argument may specify something like -Xshare:off, which makes such a warning irrelevant. 325 // 326 // Instead, we save the info so we can warn when necessary: we are doing it only during AOT Cache 327 // creation for now, but could add it to other places. 328 bad_module_prop_key = os::strdup(key); 329 bad_module_prop_value = os::strdup(value); 330 } 331 aot_log_info(aot)("optimized module handling: disabled due to incompatible property: %s=%s", key, value); 332 } 333 } 334 335 void CDSConfig::check_incompatible_property(const char* key, const char* value) { 336 static const char* incompatible_properties[] = { 337 "java.system.class.loader", 338 "jdk.module.showModuleResolution", 339 "jdk.module.validation" 340 }; 341 342 for (const char* property : incompatible_properties) { 343 if (strcmp(key, property) == 0) { 344 stop_dumping_full_module_graph(); 345 stop_using_full_module_graph(); 346 aot_log_info(aot)("full module graph: disabled due to incompatible property: %s=%s", key, value); 347 break; 348 } 349 } 350 351 // Match the logic in java/lang/System.java, but we need to know this before the System class is initialized. 352 if (strcmp(key, "java.security.manager") == 0) { 353 if (strcmp(value, "disallowed") != 0) { 354 _is_security_manager_allowed = true; 355 } 356 } 357 } 358 359 // Returns any JVM command-line option, such as "--patch-module", that's not supported by CDS. 360 static const char* find_any_unsupported_module_option() { 361 // Note that arguments.cpp has translated the command-line options into properties. If we find an 362 // unsupported property, translate it back to its command-line option for better error reporting. 363 364 // The following properties are checked by Arguments::is_internal_module_property() and cannot be 365 // directly specified in the command-line. 366 static const char* unsupported_module_properties[] = { 367 "jdk.module.limitmods", 368 "jdk.module.upgrade.path", 369 "jdk.module.patch.0" 370 }; 371 static const char* unsupported_module_options[] = { 372 "--limit-modules", 373 "--upgrade-module-path", 374 "--patch-module" 375 }; 376 377 assert(ARRAY_SIZE(unsupported_module_properties) == ARRAY_SIZE(unsupported_module_options), "must be"); 378 SystemProperty* sp = Arguments::system_properties(); 379 while (sp != nullptr) { 380 for (uint i = 0; i < ARRAY_SIZE(unsupported_module_properties); i++) { 381 if (strcmp(sp->key(), unsupported_module_properties[i]) == 0) { 382 return unsupported_module_options[i]; 383 } 384 } 385 sp = sp->next(); 386 } 387 388 return nullptr; // not found 389 } 390 391 void CDSConfig::check_unsupported_dumping_module_options() { 392 assert(is_dumping_archive(), "this function is only used with CDS dump time"); 393 const char* option = find_any_unsupported_module_option(); 394 if (option != nullptr) { 395 vm_exit_during_initialization("Cannot use the following option when dumping the shared archive", option); 396 } 397 // Check for an exploded module build in use with -Xshare:dump. 398 if (!Arguments::has_jimage()) { 399 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build"); 400 } 401 } 402 403 bool CDSConfig::has_unsupported_runtime_module_options() { 404 assert(is_using_archive(), "this function is only used with -Xshare:{on,auto}"); 405 if (ArchiveClassesAtExit != nullptr) { 406 // dynamic dumping, just return false for now. 407 // check_unsupported_dumping_properties() will be called later to check the same set of 408 // properties, and will exit the VM with the correct error message if the unsupported properties 409 // are used. 410 return false; 411 } 412 const char* option = find_any_unsupported_module_option(); 413 if (option != nullptr) { 414 if (RequireSharedSpaces) { 415 warning("CDS is disabled when the %s option is specified.", option); 416 } else { 417 if (new_aot_flags_used()) { 418 aot_log_warning(aot)("AOT cache is disabled when the %s option is specified.", option); 419 } else { 420 aot_log_info(aot)("CDS is disabled when the %s option is specified.", option); 421 } 422 } 423 return true; 424 } 425 return false; 426 } 427 428 #define CHECK_NEW_FLAG(f) check_new_flag(FLAG_IS_DEFAULT(f), #f) 429 430 void CDSConfig::check_new_flag(bool new_flag_is_default, const char* new_flag_name) { 431 if (old_cds_flags_used() && !new_flag_is_default) { 432 vm_exit_during_initialization(err_msg("Option %s cannot be used at the same time with " 433 "-Xshare:on, -Xshare:auto, -Xshare:off, -Xshare:dump, " 434 "DumpLoadedClassList, SharedClassListFile, or SharedArchiveFile", 435 new_flag_name)); 436 } 437 } 438 439 #define CHECK_SINGLE_PATH(f) check_flag_single_path(#f, f) 440 441 void CDSConfig::check_flag_single_path(const char* flag_name, const char* value) { 442 if (value != nullptr && num_archive_paths(value) != 1) { 443 vm_exit_during_initialization(err_msg("Option %s must specify a single file name", flag_name)); 444 } 445 } 446 447 void CDSConfig::check_aot_flags() { 448 if (!FLAG_IS_DEFAULT(DumpLoadedClassList) || 449 !FLAG_IS_DEFAULT(SharedClassListFile) || 450 !FLAG_IS_DEFAULT(SharedArchiveFile)) { 451 _old_cds_flags_used = true; 452 } 453 454 // "New" AOT flags must not be mixed with "classic" CDS flags such as -Xshare:dump 455 CHECK_NEW_FLAG(AOTCache); 456 CHECK_NEW_FLAG(AOTCacheOutput); 457 CHECK_NEW_FLAG(AOTConfiguration); 458 CHECK_NEW_FLAG(AOTMode); 459 460 CHECK_SINGLE_PATH(AOTCache); 461 CHECK_SINGLE_PATH(AOTCacheOutput); 462 CHECK_SINGLE_PATH(AOTConfiguration); 463 464 if (FLAG_IS_DEFAULT(AOTCache) && AOTAdapterCaching) { 465 log_debug(aot,codecache,init)("AOTCache is not specified - AOTAdapterCaching is ignored"); 466 } 467 if (FLAG_IS_DEFAULT(AOTCache) && AOTStubCaching) { 468 log_debug(aot,codecache,init)("AOTCache is not specified - AOTStubCaching is ignored"); 469 } 470 471 bool has_cache = !FLAG_IS_DEFAULT(AOTCache); 472 bool has_cache_output = !FLAG_IS_DEFAULT(AOTCacheOutput); 473 bool has_config = !FLAG_IS_DEFAULT(AOTConfiguration); 474 bool has_mode = !FLAG_IS_DEFAULT(AOTMode); 475 476 if (!has_cache && !has_cache_output && !has_config && !has_mode) { 477 // AOT flags are not used. Use classic CDS workflow 478 return; 479 } 480 481 if (has_cache && has_cache_output) { 482 vm_exit_during_initialization("Only one of AOTCache or AOTCacheOutput can be specified"); 483 } 484 485 if (!has_cache && (!has_mode || strcmp(AOTMode, "auto") == 0)) { 486 if (has_cache_output) { 487 // If AOTCacheOutput has been set, effective mode is "record". 488 // Default value for AOTConfiguration, if necessary, will be assigned in check_aotmode_record(). 489 log_info(aot)("Selected AOTMode=record because AOTCacheOutput is specified"); 490 FLAG_SET_ERGO(AOTMode, "record"); 491 } 492 } 493 494 // At least one AOT flag has been used 495 _new_aot_flags_used = true; 496 497 if (FLAG_IS_DEFAULT(AOTMode) || strcmp(AOTMode, "auto") == 0 || strcmp(AOTMode, "on") == 0) { 498 check_aotmode_auto_or_on(); 499 } else if (strcmp(AOTMode, "off") == 0) { 500 check_aotmode_off(); 501 } else if (strcmp(AOTMode, "record") == 0) { 502 check_aotmode_record(); 503 } else { 504 assert(strcmp(AOTMode, "create") == 0, "checked by AOTModeConstraintFunc"); 505 check_aotmode_create(); 506 } 507 508 // This is an old flag used by CDS regression testing only. It doesn't apply 509 // to the AOT workflow. 510 FLAG_SET_ERGO(AllowArchivingWithJavaAgent, false); 511 } 512 513 void CDSConfig::check_aotmode_off() { 514 UseSharedSpaces = false; 515 RequireSharedSpaces = false; 516 } 517 518 void CDSConfig::check_aotmode_auto_or_on() { 519 if (!FLAG_IS_DEFAULT(AOTConfiguration)) { 520 vm_exit_during_initialization(err_msg("AOTConfiguration can only be used with when AOTMode is record or create (selected AOTMode = %s)", 521 FLAG_IS_DEFAULT(AOTMode) ? "auto" : AOTMode)); 522 } 523 524 UseSharedSpaces = true; 525 if (FLAG_IS_DEFAULT(AOTMode) || (strcmp(AOTMode, "auto") == 0)) { 526 RequireSharedSpaces = false; 527 } else { 528 assert(strcmp(AOTMode, "on") == 0, "already checked"); 529 RequireSharedSpaces = true; 530 } 531 } 532 533 // %p substitution in AOTCache, AOTCacheOutput and AOTCacheConfiguration 534 static void substitute_aot_filename(JVMFlagsEnum flag_enum) { 535 JVMFlag* flag = JVMFlag::flag_from_enum(flag_enum); 536 const char* filename = flag->read<const char*>(); 537 assert(filename != nullptr, "must not have default value"); 538 539 // For simplicity, we don't allow %p/%t to be specified twice, because make_log_name() 540 // substitutes only the first occurrence. Otherwise, if we run with 541 // java -XX:AOTCacheOutput=%p%p.aot 542 // it will end up with both the pid of the training process and the assembly process. 543 const char* first_p = strstr(filename, "%p"); 544 if (first_p != nullptr && strstr(first_p + 2, "%p") != nullptr) { 545 vm_exit_during_initialization(err_msg("%s cannot contain more than one %%p", flag->name())); 546 } 547 const char* first_t = strstr(filename, "%t"); 548 if (first_t != nullptr && strstr(first_t + 2, "%t") != nullptr) { 549 vm_exit_during_initialization(err_msg("%s cannot contain more than one %%t", flag->name())); 550 } 551 552 // Note: with single-command training, %p will be the pid of the training process, not the 553 // assembly process. 554 const char* new_filename = make_log_name(filename, nullptr); 555 if (strcmp(filename, new_filename) != 0) { 556 JVMFlag::Error err = JVMFlagAccess::set_ccstr(flag, &new_filename, JVMFlagOrigin::ERGONOMIC); 557 assert(err == JVMFlag::SUCCESS, "must never fail"); 558 } 559 FREE_C_HEAP_ARRAY(char, new_filename); 560 } 561 562 void CDSConfig::check_aotmode_record() { 563 bool has_config = !FLAG_IS_DEFAULT(AOTConfiguration); 564 bool has_output = !FLAG_IS_DEFAULT(AOTCacheOutput); 565 566 if (!has_output && !has_config) { 567 vm_exit_during_initialization("At least one of AOTCacheOutput and AOTConfiguration must be specified when using -XX:AOTMode=record"); 568 } 569 570 if (has_output) { 571 _is_single_command_training = true; 572 substitute_aot_filename(FLAG_MEMBER_ENUM(AOTCacheOutput)); 573 if (!has_config) { 574 // Too early; can't use resource allocation yet. 575 size_t len = strlen(AOTCacheOutput) + 10; 576 char* temp = AllocateHeap(len, mtArguments); 577 jio_snprintf(temp, len, "%s.config", AOTCacheOutput); 578 FLAG_SET_ERGO(AOTConfiguration, temp); 579 FreeHeap(temp); 580 _has_temp_aot_config_file = true; 581 } 582 } 583 584 if (!FLAG_IS_DEFAULT(AOTCache)) { 585 vm_exit_during_initialization("AOTCache must not be specified when using -XX:AOTMode=record"); 586 } 587 588 substitute_aot_filename(FLAG_MEMBER_ENUM(AOTConfiguration)); 589 590 UseSharedSpaces = false; 591 RequireSharedSpaces = false; 592 _is_dumping_static_archive = true; 593 _is_dumping_preimage_static_archive = true; 594 595 // At VM exit, the module graph may be contaminated with program states. 596 // We will rebuild the module graph when dumping the CDS final image. 597 disable_heap_dumping(); 598 } 599 600 void CDSConfig::check_aotmode_create() { 601 if (FLAG_IS_DEFAULT(AOTConfiguration)) { 602 vm_exit_during_initialization("AOTConfiguration must be specified when using -XX:AOTMode=create"); 603 } 604 605 bool has_cache = !FLAG_IS_DEFAULT(AOTCache); 606 bool has_cache_output = !FLAG_IS_DEFAULT(AOTCacheOutput); 607 608 assert(!(has_cache && has_cache_output), "already checked"); 609 610 if (!has_cache && !has_cache_output) { 611 vm_exit_during_initialization("AOTCache or AOTCacheOutput must be specified when using -XX:AOTMode=create"); 612 } 613 614 if (!has_cache) { 615 precond(has_cache_output); 616 FLAG_SET_ERGO(AOTCache, AOTCacheOutput); 617 } 618 // No need to check for (!has_cache_output), as we don't look at AOTCacheOutput after here. 619 620 substitute_aot_filename(FLAG_MEMBER_ENUM(AOTCache)); 621 622 _is_dumping_final_static_archive = true; 623 UseSharedSpaces = true; 624 RequireSharedSpaces = true; 625 626 if (!FileMapInfo::is_preimage_static_archive(AOTConfiguration)) { 627 vm_exit_during_initialization("Must be a valid AOT configuration generated by the current JVM", AOTConfiguration); 628 } 629 630 CDSConfig::enable_dumping_static_archive(); 631 632 // We don't load any agents in the assembly phase, so we can ensure that the agents 633 // cannot affect the contents of the AOT cache. E.g., we don't want the agents to 634 // redefine any cached classes. We also don't want the agents to modify heap objects that 635 // are cached. 636 // 637 // Since application is not executed in the assembly phase, there's no need to load 638 // the agents anyway -- no one will notice that the agents are not loaded. 639 JvmtiAgentList::disable_agent_list(); 640 } 641 642 void CDSConfig::ergo_init_aot_paths() { 643 assert(_cds_ergo_initialize_started, "sanity"); 644 if (is_dumping_static_archive()) { 645 if (is_dumping_preimage_static_archive()) { 646 _output_archive_path = AOTConfiguration; 647 } else { 648 assert(is_dumping_final_static_archive(), "must be"); 649 _input_static_archive_path = AOTConfiguration; 650 _output_archive_path = AOTCache; 651 } 652 } else if (is_using_archive()) { 653 if (FLAG_IS_DEFAULT(AOTCache)) { 654 // Only -XX:AOTMode={auto,on} is specified 655 _input_static_archive_path = default_archive_path(); 656 } else { 657 _input_static_archive_path = AOTCache; 658 } 659 } 660 } 661 662 bool CDSConfig::check_vm_args_consistency(bool patch_mod_javabase, bool mode_flag_cmd_line) { 663 assert(!_cds_ergo_initialize_started, "This is called earlier than CDSConfig::ergo_initialize()"); 664 665 check_aot_flags(); 666 667 if (!FLAG_IS_DEFAULT(AOTMode)) { 668 // Using any form of the new AOTMode switch enables enhanced optimizations. 669 FLAG_SET_ERGO_IF_DEFAULT(AOTClassLinking, true); 670 } 671 672 setup_compiler_args(); 673 674 if (AOTClassLinking) { 675 // If AOTClassLinking is specified, enable all these optimizations by default. 676 FLAG_SET_ERGO_IF_DEFAULT(AOTInvokeDynamicLinking, true); 677 FLAG_SET_ERGO_IF_DEFAULT(ArchiveDynamicProxies, true); 678 FLAG_SET_ERGO_IF_DEFAULT(ArchiveLoaderLookupCache, true); 679 FLAG_SET_ERGO_IF_DEFAULT(ArchivePackages, true); 680 FLAG_SET_ERGO_IF_DEFAULT(ArchiveProtectionDomains, true); 681 FLAG_SET_ERGO_IF_DEFAULT(ArchiveReflectionData, true); 682 } else { 683 // All of these *might* depend on AOTClassLinking. Better be safe than sorry. 684 FLAG_SET_ERGO(AOTInvokeDynamicLinking, false); 685 FLAG_SET_ERGO(ArchiveDynamicProxies, false); 686 FLAG_SET_ERGO(ArchiveLoaderLookupCache, false); 687 FLAG_SET_ERGO(ArchivePackages, false); 688 FLAG_SET_ERGO(ArchiveProtectionDomains, false); 689 FLAG_SET_ERGO(ArchiveReflectionData, false); 690 691 if (CDSConfig::is_dumping_archive()) { 692 FLAG_SET_ERGO(AOTRecordTraining, false); 693 FLAG_SET_ERGO(AOTReplayTraining, false); 694 AOTCodeCache::disable_caching(); 695 } 696 } 697 698 #ifdef _WINDOWS 699 // This optimization is not working on Windows for some reason. See JDK-8338604. 700 FLAG_SET_ERGO(ArchiveReflectionData, false); 701 #endif 702 703 if (is_dumping_static_archive()) { 704 if (is_dumping_preimage_static_archive() || is_dumping_final_static_archive()) { 705 // Don't tweak execution mode 706 } else if (!mode_flag_cmd_line) { 707 // By default, -Xshare:dump runs in interpreter-only mode, which is required for deterministic archive. 708 // 709 // If your classlist is large and you don't care about deterministic dumping, you can use 710 // -Xshare:dump -Xmixed to improve dumping speed. 711 Arguments::set_mode_flags(Arguments::_int); 712 } else if (Arguments::mode() == Arguments::_comp) { 713 // -Xcomp may use excessive CPU for the test tiers. Also, -Xshare:dump runs a small and fixed set of 714 // Java code, so there's not much benefit in running -Xcomp. 715 aot_log_info(aot)("reduced -Xcomp to -Xmixed for static dumping"); 716 Arguments::set_mode_flags(Arguments::_mixed); 717 } 718 719 // String deduplication may cause CDS to iterate the strings in different order from one 720 // run to another which resulting in non-determinstic CDS archives. 721 // Disable UseStringDeduplication while dumping CDS archive. 722 UseStringDeduplication = false; 723 } 724 725 // RecordDynamicDumpInfo is not compatible with ArchiveClassesAtExit 726 if (ArchiveClassesAtExit != nullptr && RecordDynamicDumpInfo) { 727 jio_fprintf(defaultStream::output_stream(), 728 "-XX:+RecordDynamicDumpInfo cannot be used with -XX:ArchiveClassesAtExit.\n"); 729 return false; 730 } 731 732 if (ArchiveClassesAtExit == nullptr && !RecordDynamicDumpInfo) { 733 disable_dumping_dynamic_archive(); 734 } else { 735 enable_dumping_dynamic_archive(ArchiveClassesAtExit); 736 } 737 738 if (AutoCreateSharedArchive) { 739 if (SharedArchiveFile == nullptr) { 740 aot_log_warning(aot)("-XX:+AutoCreateSharedArchive requires -XX:SharedArchiveFile"); 741 return false; 742 } 743 if (ArchiveClassesAtExit != nullptr) { 744 aot_log_warning(aot)("-XX:+AutoCreateSharedArchive does not work with ArchiveClassesAtExit"); 745 return false; 746 } 747 } 748 749 if (is_using_archive() && patch_mod_javabase) { 750 Arguments::no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched."); 751 } 752 if (is_using_archive() && has_unsupported_runtime_module_options()) { 753 UseSharedSpaces = false; 754 } 755 756 if (is_dumping_archive()) { 757 // Always verify non-system classes during CDS dump 758 if (!BytecodeVerificationRemote) { 759 BytecodeVerificationRemote = true; 760 aot_log_info(aot)("All non-system classes will be verified (-Xverify:remote) during CDS dump time."); 761 } 762 } 763 764 if (AOTClassLinking) { 765 if (is_dumping_final_static_archive() && !is_dumping_full_module_graph()) { 766 if (bad_module_prop_key != nullptr) { 767 log_warning(cds)("optimized module handling/full module graph: disabled due to incompatible property: %s=%s", 768 bad_module_prop_key, bad_module_prop_value); 769 } 770 vm_exit_during_initialization("AOT cache cannot be created because AOTClassLinking is enabled but full module graph is disabled"); 771 } 772 } 773 774 return true; 775 } 776 777 void CDSConfig::setup_compiler_args() { 778 // AOT profiles and AOT-compiled methods are supported only in the JEP 483 workflow. 779 bool can_dump_profile_and_compiled_code = !CompilerConfig::is_interpreter_only() && AOTClassLinking && new_aot_flags_used(); 780 bool can_use_profile_and_compiled_code = !CompilerConfig::is_interpreter_only() && new_aot_flags_used(); 781 782 if (is_dumping_preimage_static_archive() && can_dump_profile_and_compiled_code) { 783 // JEP 483 workflow -- training 784 FLAG_SET_ERGO_IF_DEFAULT(AOTRecordTraining, true); 785 FLAG_SET_ERGO(AOTReplayTraining, false); 786 AOTCodeCache::disable_caching(); 787 } else if (is_dumping_final_static_archive() && can_dump_profile_and_compiled_code) { 788 // JEP 483 workflow -- assembly 789 FLAG_SET_ERGO(AOTRecordTraining, false); 790 FLAG_SET_ERGO_IF_DEFAULT(AOTReplayTraining, true); 791 AOTCodeCache::enable_caching(); 792 disable_dumping_aot_code(); // Cannot dump aot code until metadata and heap are dumped. 793 } else if (is_using_archive() && can_use_profile_and_compiled_code) { 794 // JEP 483 workflow -- production 795 FLAG_SET_ERGO(AOTRecordTraining, false); 796 FLAG_SET_ERGO_IF_DEFAULT(AOTReplayTraining, true); 797 AOTCodeCache::enable_caching(); 798 } else { 799 FLAG_SET_ERGO(AOTReplayTraining, false); 800 FLAG_SET_ERGO(AOTRecordTraining, false); 801 AOTCodeCache::disable_caching(); 802 } 803 } 804 805 void CDSConfig::prepare_for_dumping() { 806 assert(CDSConfig::is_dumping_archive(), "sanity"); 807 808 if (is_dumping_dynamic_archive() && !is_using_archive()) { 809 assert(!is_dumping_static_archive(), "cannot be dumping both static and dynamic archives"); 810 811 // This could happen if SharedArchiveFile has failed to load: 812 // - -Xshare:off was specified 813 // - SharedArchiveFile points to an non-existent file. 814 // - SharedArchiveFile points to an archive that has failed CRC check 815 // - SharedArchiveFile is not specified and the VM doesn't have a compatible default archive 816 817 #define __THEMSG " is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info." 818 if (RecordDynamicDumpInfo) { 819 aot_log_error(aot)("-XX:+RecordDynamicDumpInfo%s", __THEMSG); 820 MetaspaceShared::unrecoverable_loading_error(); 821 } else { 822 assert(ArchiveClassesAtExit != nullptr, "sanity"); 823 aot_log_warning(aot)("-XX:ArchiveClassesAtExit" __THEMSG); 824 } 825 #undef __THEMSG 826 disable_dumping_dynamic_archive(); 827 return; 828 } 829 830 check_unsupported_dumping_module_options(); 831 } 832 833 bool CDSConfig::is_dumping_classic_static_archive() { 834 return _is_dumping_static_archive && 835 !is_dumping_preimage_static_archive() && 836 !is_dumping_final_static_archive(); 837 } 838 839 bool CDSConfig::is_dumping_preimage_static_archive() { 840 return _is_dumping_preimage_static_archive; 841 } 842 843 bool CDSConfig::is_dumping_preimage_static_archive_with_triggers() { 844 return (!FLAG_IS_DEFAULT(AOTEndTrainingOnMethodEntry)) && is_dumping_preimage_static_archive(); 845 } 846 847 bool CDSConfig::is_dumping_final_static_archive() { 848 return _is_dumping_final_static_archive; 849 } 850 851 void CDSConfig::enable_dumping_dynamic_archive(const char* output_path) { 852 _is_dumping_dynamic_archive = true; 853 if (output_path == nullptr) { 854 // output_path can be null when the VM is started with -XX:+RecordDynamicDumpInfo 855 // in anticipation of "jcmd VM.cds dynamic_dump", which will provide the actual 856 // output path. 857 _output_archive_path = nullptr; 858 } else { 859 _output_archive_path = os::strdup_check_oom(output_path, mtArguments); 860 } 861 } 862 863 bool CDSConfig::allow_only_single_java_thread() { 864 // See comments in JVM_StartThread() 865 return is_dumping_classic_static_archive() || is_dumping_final_static_archive(); 866 } 867 868 bool CDSConfig::is_logging_dynamic_proxies() { 869 return ClassListWriter::is_enabled() || is_dumping_preimage_static_archive(); 870 } 871 872 // Preserve all states that were examined used during dumptime verification, such 873 // that the verification result (pass or fail) cannot be changed at runtime. 874 // 875 // For example, if the verification of ik requires that class A must be a subtype of B, 876 // then this relationship between A and B cannot be changed at runtime. I.e., the app 877 // cannot load alternative versions of A and B such that A is not a subtype of B. 878 bool CDSConfig::preserve_all_dumptime_verification_states(const InstanceKlass* ik) { 879 return is_dumping_aot_linked_classes() && SystemDictionaryShared::is_builtin(ik); 880 } 881 882 bool CDSConfig::is_using_archive() { 883 return UseSharedSpaces; 884 } 885 886 bool CDSConfig::is_using_only_default_archive() { 887 return is_using_archive() && 888 input_static_archive_path() != nullptr && 889 default_archive_path() != nullptr && 890 strcmp(input_static_archive_path(), default_archive_path()) == 0 && 891 input_dynamic_archive_path() == nullptr; 892 } 893 894 bool CDSConfig::is_logging_lambda_form_invokers() { 895 return ClassListWriter::is_enabled() || is_dumping_dynamic_archive() || is_dumping_preimage_static_archive(); 896 } 897 898 bool CDSConfig::is_dumping_regenerated_lambdaform_invokers() { 899 if (is_dumping_final_static_archive()) { 900 // No need to regenerate -- the lambda form invokers should have been regenerated 901 // in the preimage archive (if allowed) 902 return false; 903 } else if (is_dumping_dynamic_archive() && is_using_aot_linked_classes()) { 904 // The base archive has aot-linked classes that may have AOT-resolved CP references 905 // that point to the lambda form invokers in the base archive. Such pointers will 906 // be invalid if lambda form invokers are regenerated in the dynamic archive. 907 return false; 908 } else if (CDSConfig::is_dumping_method_handles()) { 909 // Work around JDK-8310831, as some methods in lambda form holder classes may not get generated. 910 return false; 911 } else { 912 return is_dumping_archive(); 913 } 914 } 915 916 void CDSConfig::stop_using_optimized_module_handling() { 917 _is_using_optimized_module_handling = false; 918 _is_dumping_full_module_graph = false; // This requires is_using_optimized_module_handling() 919 _is_using_full_module_graph = false; // This requires is_using_optimized_module_handling() 920 } 921 922 923 CDSConfig::DumperThreadMark::DumperThreadMark(JavaThread* current) { 924 assert(_dumper_thread == nullptr, "sanity"); 925 _dumper_thread = current; 926 } 927 928 CDSConfig::DumperThreadMark::~DumperThreadMark() { 929 assert(_dumper_thread != nullptr, "sanity"); 930 _dumper_thread = nullptr; 931 } 932 933 bool CDSConfig::current_thread_is_vm_or_dumper() { 934 Thread* t = Thread::current(); 935 return t != nullptr && (t->is_VM_thread() || t == _dumper_thread); 936 } 937 938 const char* CDSConfig::type_of_archive_being_loaded() { 939 if (is_dumping_final_static_archive()) { 940 return "AOT configuration file"; 941 } else if (new_aot_flags_used()) { 942 return "AOT cache"; 943 } else { 944 return "shared archive file"; 945 } 946 } 947 948 const char* CDSConfig::type_of_archive_being_written() { 949 if (is_dumping_preimage_static_archive()) { 950 return "AOT configuration file"; 951 } else if (new_aot_flags_used()) { 952 return "AOT cache"; 953 } else { 954 return "shared archive file"; 955 } 956 } 957 958 // If an incompatible VM options is found, return a text message that explains why 959 static const char* check_options_incompatible_with_dumping_heap() { 960 #if INCLUDE_CDS_JAVA_HEAP 961 if (!UseCompressedClassPointers) { 962 return "UseCompressedClassPointers must be true"; 963 } 964 965 // Almost all GCs support heap region dump, except ZGC (so far). 966 if (UseZGC) { 967 return "ZGC is not supported"; 968 } 969 970 return nullptr; 971 #else 972 return "JVM not configured for writing Java heap objects"; 973 #endif 974 } 975 976 void CDSConfig::log_reasons_for_not_dumping_heap() { 977 const char* reason; 978 979 assert(!is_dumping_heap(), "sanity"); 980 981 if (_disable_heap_dumping) { 982 reason = "Programmatically disabled"; 983 } else { 984 reason = check_options_incompatible_with_dumping_heap(); 985 } 986 987 assert(reason != nullptr, "sanity"); 988 aot_log_info(aot)("Archived java heap is not supported: %s", reason); 989 } 990 991 // This is *Legacy* optimization for lambdas before JEP 483. May be removed in the future. 992 bool CDSConfig::is_dumping_lambdas_in_legacy_mode() { 993 return !is_dumping_method_handles(); 994 } 995 996 #if INCLUDE_CDS_JAVA_HEAP 997 bool CDSConfig::are_vm_options_incompatible_with_dumping_heap() { 998 return check_options_incompatible_with_dumping_heap() != nullptr; 999 } 1000 1001 bool CDSConfig::is_dumping_heap() { 1002 if (!(is_dumping_classic_static_archive() || is_dumping_final_static_archive()) 1003 || are_vm_options_incompatible_with_dumping_heap() 1004 || _disable_heap_dumping) { 1005 return false; 1006 } 1007 return true; 1008 } 1009 1010 bool CDSConfig::is_loading_heap() { 1011 return ArchiveHeapLoader::is_in_use(); 1012 } 1013 1014 bool CDSConfig::is_using_full_module_graph() { 1015 if (ClassLoaderDataShared::is_full_module_graph_loaded()) { 1016 return true; 1017 } 1018 1019 if (!_is_using_full_module_graph) { 1020 return false; 1021 } 1022 1023 if (is_using_archive() && ArchiveHeapLoader::can_use()) { 1024 // Classes used by the archived full module graph are loaded in JVMTI early phase. 1025 assert(!(JvmtiExport::should_post_class_file_load_hook() && JvmtiExport::has_early_class_hook_env()), 1026 "CDS should be disabled if early class hooks are enabled"); 1027 return true; 1028 } else { 1029 _is_using_full_module_graph = false; 1030 return false; 1031 } 1032 } 1033 1034 void CDSConfig::stop_dumping_full_module_graph(const char* reason) { 1035 if (_is_dumping_full_module_graph) { 1036 _is_dumping_full_module_graph = false; 1037 if (reason != nullptr) { 1038 aot_log_info(aot)("full module graph cannot be dumped: %s", reason); 1039 } 1040 } 1041 } 1042 1043 void CDSConfig::stop_using_full_module_graph(const char* reason) { 1044 assert(!ClassLoaderDataShared::is_full_module_graph_loaded(), "you call this function too late!"); 1045 if (_is_using_full_module_graph) { 1046 _is_using_full_module_graph = false; 1047 if (reason != nullptr) { 1048 aot_log_info(aot)("full module graph cannot be loaded: %s", reason); 1049 } 1050 } 1051 } 1052 1053 bool CDSConfig::is_dumping_aot_linked_classes() { 1054 if (is_dumping_preimage_static_archive()) { 1055 return false; 1056 } else if (is_dumping_dynamic_archive()) { 1057 return is_using_full_module_graph() && AOTClassLinking; 1058 } else if (is_dumping_static_archive()) { 1059 return is_dumping_full_module_graph() && AOTClassLinking; 1060 } else { 1061 return false; 1062 } 1063 } 1064 1065 bool CDSConfig::is_using_aot_linked_classes() { 1066 // Make sure we have the exact same module graph as in the assembly phase, or else 1067 // some aot-linked classes may not be visible so cannot be loaded. 1068 return is_using_full_module_graph() && _has_aot_linked_classes; 1069 } 1070 1071 bool CDSConfig::is_dumping_dynamic_proxies() { 1072 return is_dumping_full_module_graph() && is_dumping_invokedynamic() && ArchiveDynamicProxies; 1073 } 1074 1075 void CDSConfig::set_has_aot_linked_classes(bool has_aot_linked_classes) { 1076 _has_aot_linked_classes |= has_aot_linked_classes; 1077 } 1078 1079 bool CDSConfig::is_initing_classes_at_dump_time() { 1080 return is_dumping_heap() && is_dumping_aot_linked_classes(); 1081 } 1082 1083 bool CDSConfig::is_dumping_invokedynamic() { 1084 // Requires is_dumping_aot_linked_classes(). Otherwise the classes of some archived heap 1085 // objects used by the archive indy callsites may be replaced at runtime. 1086 return AOTInvokeDynamicLinking && is_dumping_aot_linked_classes() && is_dumping_heap(); 1087 } 1088 1089 bool CDSConfig::is_dumping_packages() { 1090 return ArchivePackages && is_dumping_heap(); 1091 } 1092 1093 bool CDSConfig::is_loading_packages() { 1094 return UseSharedSpaces && is_using_full_module_graph() && _is_loading_packages; 1095 } 1096 1097 bool CDSConfig::is_dumping_protection_domains() { 1098 if (_is_security_manager_allowed) { 1099 // For sanity, don't archive PDs. TODO: can this be relaxed? 1100 return false; 1101 } 1102 // Archived PDs for the modules will reference their java.lang.Module, which must 1103 // also be archived. 1104 return ArchiveProtectionDomains && is_dumping_full_module_graph(); 1105 } 1106 1107 bool CDSConfig::is_loading_protection_domains() { 1108 if (_is_security_manager_allowed) { 1109 // For sanity, don't used any archived PDs. TODO: can this be relaxed? 1110 return false; 1111 } 1112 return UseSharedSpaces && is_using_full_module_graph() && _is_loading_protection_domains; 1113 } 1114 1115 bool CDSConfig::is_dumping_reflection_data() { 1116 // reflection data use LambdaForm classes 1117 return ArchiveReflectionData && is_dumping_invokedynamic(); 1118 } 1119 1120 // When we are dumping aot-linked classes and we are able to write archived heap objects, we automatically 1121 // enable the archiving of MethodHandles. This will in turn enable the archiving of MethodTypes and hidden 1122 // classes that are used in the implementation of MethodHandles. 1123 // Archived MethodHandles are required for higher-level optimizations such as AOT resolution of invokedynamic 1124 // and dynamic proxies. 1125 bool CDSConfig::is_dumping_method_handles() { 1126 return is_initing_classes_at_dump_time(); 1127 } 1128 1129 #endif // INCLUDE_CDS_JAVA_HEAP 1130 1131 // AOT code generation and its archiving is disabled by default. 1132 // We enable it only in the final image dump after the metadata and heap are dumped. 1133 // This affects only JITed code because it may have embedded oops and metadata pointers 1134 // which AOT code encodes as offsets in final CDS archive regions. 1135 1136 static bool _is_dumping_aot_code = false; 1137 1138 bool CDSConfig::is_dumping_aot_code() { 1139 return _is_dumping_aot_code; 1140 } 1141 1142 void CDSConfig::disable_dumping_aot_code() { 1143 _is_dumping_aot_code = false; 1144 } 1145 1146 void CDSConfig::enable_dumping_aot_code() { 1147 _is_dumping_aot_code = true; 1148 } 1149 1150 bool CDSConfig::is_dumping_adapters() { 1151 return (AOTAdapterCaching && is_dumping_final_static_archive()); 1152 }