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/aotMetaspace.hpp" 28 #include "cds/archiveHeapLoader.hpp" 29 #include "cds/cds_globals.hpp" 30 #include "cds/cdsConfig.hpp" 31 #include "cds/classListWriter.hpp" 32 #include "cds/filemap.hpp" 33 #include "cds/heapShared.hpp" 34 #include "classfile/classLoaderDataShared.hpp" 35 #include "classfile/moduleEntry.hpp" 36 #include "classfile/systemDictionaryShared.hpp" 37 #include "code/aotCodeCache.hpp" 38 #include "compiler/compilerDefinitions.inline.hpp" 39 #include "include/jvm_io.h" 40 #include "logging/log.hpp" 41 #include "memory/universe.hpp" 42 #include "prims/jvmtiAgentList.hpp" 43 #include "prims/jvmtiExport.hpp" 44 #include "runtime/arguments.hpp" 45 #include "runtime/globals_extension.hpp" 46 #include "runtime/java.hpp" 47 #include "runtime/vmThread.hpp" 48 #include "utilities/defaultStream.hpp" 49 #include "utilities/formatBuffer.hpp" 50 51 bool CDSConfig::_is_dumping_static_archive = false; 52 bool CDSConfig::_is_dumping_preimage_static_archive = false; 53 bool CDSConfig::_is_dumping_final_static_archive = false; 54 bool CDSConfig::_is_dumping_dynamic_archive = false; 55 bool CDSConfig::_is_using_optimized_module_handling = true; 56 bool CDSConfig::_is_dumping_full_module_graph = true; 57 bool CDSConfig::_is_using_full_module_graph = true; 58 bool CDSConfig::_has_aot_linked_classes = false; 59 bool CDSConfig::_is_single_command_training = false; 60 bool CDSConfig::_has_temp_aot_config_file = false; 61 bool CDSConfig::_old_cds_flags_used = false; 62 bool CDSConfig::_new_aot_flags_used = false; 63 bool CDSConfig::_disable_heap_dumping = false; 64 bool CDSConfig::_is_at_aot_safepoint = false; 65 66 const char* CDSConfig::_default_archive_path = nullptr; 67 const char* CDSConfig::_input_static_archive_path = nullptr; 68 const char* CDSConfig::_input_dynamic_archive_path = nullptr; 69 const char* CDSConfig::_output_archive_path = nullptr; 70 71 JavaThread* CDSConfig::_dumper_thread = nullptr; 72 73 int CDSConfig::get_status() { 74 assert(Universe::is_fully_initialized(), "status is finalized only after Universe is initialized"); 75 return (is_dumping_aot_linked_classes() ? IS_DUMPING_AOT_LINKED_CLASSES : 0) | 76 (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 } 84 85 DEBUG_ONLY(static bool _cds_ergo_initialize_started = false); 86 87 void CDSConfig::ergo_initialize() { 88 DEBUG_ONLY(_cds_ergo_initialize_started = true); 89 90 if (is_dumping_static_archive() && !is_dumping_final_static_archive()) { 91 // Note: -Xshare and -XX:AOTMode flags are mutually exclusive. 92 // - Classic workflow: -Xshare:on and -Xshare:dump cannot take effect at the same time. 93 // - JEP 483 workflow: -XX:AOTMode:record and -XX:AOTMode=on cannot take effect at the same time. 94 // So we can never come to here with RequireSharedSpaces==true. 95 assert(!RequireSharedSpaces, "sanity"); 96 97 // If dumping the classic archive, or making an AOT training run (dumping a preimage archive), 98 // for sanity, parse all classes from classfiles. 99 // TODO: in the future, if we want to support re-training on top of an existing AOT cache, this 100 // needs to be changed. 101 UseSharedSpaces = false; 102 } 103 104 // Initialize shared archive paths which could include both base and dynamic archive paths 105 // This must be after set_ergonomics_flags() called so flag UseCompressedOops is set properly. 106 if (is_dumping_static_archive() || is_using_archive()) { 107 if (new_aot_flags_used()) { 108 ergo_init_aot_paths(); 109 } else { 110 ergo_init_classic_archive_paths(); 111 } 112 } 113 114 if (!is_dumping_heap()) { 115 _is_dumping_full_module_graph = false; 116 } 117 118 AOTMapLogger::ergo_initialize(); 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 stringStream tmp; 147 if (is_vm_statically_linked()) { 148 // It's easier to form the path using JAVA_HOME as os::jvm_path 149 // gives the path to the launcher executable on static JDK. 150 const char* subdir = WINDOWS_ONLY("bin") NOT_WINDOWS("lib"); 151 tmp.print("%s%s%s%s%s%sclasses", 152 Arguments::get_java_home(), os::file_separator(), 153 subdir, os::file_separator(), 154 Abstract_VM_Version::vm_variant(), os::file_separator()); 155 } else { 156 // Assume .jsa is in the same directory where libjvm resides on 157 // non-static JDK. 158 char jvm_path[JVM_MAXPATHLEN]; 159 os::jvm_path(jvm_path, sizeof(jvm_path)); 160 char *end = strrchr(jvm_path, *os::file_separator()); 161 if (end != nullptr) *end = '\0'; 162 tmp.print("%s%sclasses", jvm_path, os::file_separator()); 163 } 164 #ifdef _LP64 165 if (!UseCompressedOops) { 166 tmp.print_raw("_nocoops"); 167 } 168 if (UseCompactObjectHeaders) { 169 // Note that generation of xxx_coh.jsa variants require 170 // --enable-cds-archive-coh at build time 171 tmp.print_raw("_coh"); 172 } 173 #endif 174 tmp.print_raw(".jsa"); 175 _default_archive_path = os::strdup(tmp.base()); 176 } 177 return _default_archive_path; 178 } 179 180 int CDSConfig::num_archive_paths(const char* path_spec) { 181 if (path_spec == nullptr) { 182 return 0; 183 } 184 int npaths = 1; 185 char* p = (char*)path_spec; 186 while (*p != '\0') { 187 if (*p == os::path_separator()[0]) { 188 npaths++; 189 } 190 p++; 191 } 192 return npaths; 193 } 194 195 void CDSConfig::extract_archive_paths(const char* archive_path, 196 const char** base_archive_path, 197 const char** top_archive_path) { 198 char* begin_ptr = (char*)archive_path; 199 char* end_ptr = strchr((char*)archive_path, os::path_separator()[0]); 200 if (end_ptr == nullptr || end_ptr == begin_ptr) { 201 vm_exit_during_initialization("Base archive was not specified", archive_path); 202 } 203 size_t len = end_ptr - begin_ptr; 204 char* cur_path = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); 205 strncpy(cur_path, begin_ptr, len); 206 cur_path[len] = '\0'; 207 *base_archive_path = cur_path; 208 209 begin_ptr = ++end_ptr; 210 if (*begin_ptr == '\0') { 211 vm_exit_during_initialization("Top archive was not specified", archive_path); 212 } 213 end_ptr = strchr(begin_ptr, '\0'); 214 assert(end_ptr != nullptr, "sanity"); 215 len = end_ptr - begin_ptr; 216 cur_path = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); 217 strncpy(cur_path, begin_ptr, len + 1); 218 *top_archive_path = cur_path; 219 } 220 221 void CDSConfig::ergo_init_classic_archive_paths() { 222 assert(_cds_ergo_initialize_started, "sanity"); 223 if (ArchiveClassesAtExit != nullptr) { 224 assert(!RecordDynamicDumpInfo, "already checked"); 225 if (is_dumping_static_archive()) { 226 vm_exit_during_initialization("-XX:ArchiveClassesAtExit cannot be used with -Xshare:dump"); 227 } 228 check_unsupported_dumping_module_options(); 229 230 if (os::same_files(default_archive_path(), ArchiveClassesAtExit)) { 231 vm_exit_during_initialization( 232 "Cannot specify the default CDS archive for -XX:ArchiveClassesAtExit", default_archive_path()); 233 } 234 } 235 236 if (SharedArchiveFile == nullptr) { 237 _input_static_archive_path = default_archive_path(); 238 if (is_dumping_static_archive()) { 239 _output_archive_path = _input_static_archive_path; 240 } 241 } else { 242 int num_archives = num_archive_paths(SharedArchiveFile); 243 assert(num_archives > 0, "must be"); 244 245 if (is_dumping_archive() && num_archives > 1) { 246 vm_exit_during_initialization( 247 "Cannot have more than 1 archive file specified in -XX:SharedArchiveFile during CDS dumping"); 248 } 249 250 if (is_dumping_static_archive()) { 251 assert(num_archives == 1, "just checked above"); 252 // Static dump is simple: only one archive is allowed in SharedArchiveFile. This file 253 // will be overwritten regardless of its contents 254 _output_archive_path = SharedArchiveFile; 255 } else { 256 // SharedArchiveFile may specify one or two files. In case (c), the path for base.jsa 257 // is read from top.jsa 258 // (a) 1 file: -XX:SharedArchiveFile=base.jsa 259 // (b) 2 files: -XX:SharedArchiveFile=base.jsa:top.jsa 260 // (c) 2 files: -XX:SharedArchiveFile=top.jsa 261 // 262 // However, if either RecordDynamicDumpInfo or ArchiveClassesAtExit is used, we do not 263 // allow cases (b) and (c). Case (b) is already checked above. 264 265 if (num_archives > 2) { 266 vm_exit_during_initialization( 267 "Cannot have more than 2 archive files specified in the -XX:SharedArchiveFile option"); 268 } 269 270 if (num_archives == 1) { 271 const char* base_archive_path = nullptr; 272 bool success = 273 FileMapInfo::get_base_archive_name_from_header(SharedArchiveFile, &base_archive_path); 274 if (!success) { 275 // If +AutoCreateSharedArchive and the specified shared archive does not exist, 276 // regenerate the dynamic archive base on default archive. 277 if (AutoCreateSharedArchive && !os::file_exists(SharedArchiveFile)) { 278 enable_dumping_dynamic_archive(SharedArchiveFile); 279 FLAG_SET_ERGO(ArchiveClassesAtExit, SharedArchiveFile); 280 _input_static_archive_path = default_archive_path(); 281 FLAG_SET_ERGO(SharedArchiveFile, nullptr); 282 } else { 283 if (AutoCreateSharedArchive) { 284 warning("-XX:+AutoCreateSharedArchive is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info."); 285 AutoCreateSharedArchive = false; 286 } 287 aot_log_error(aot)("Not a valid %s (%s)", type_of_archive_being_loaded(), SharedArchiveFile); 288 Arguments::no_shared_spaces("invalid archive"); 289 } 290 } else if (base_archive_path == nullptr) { 291 // User has specified a single archive, which is a static archive. 292 _input_static_archive_path = SharedArchiveFile; 293 } else { 294 // User has specified a single archive, which is a dynamic archive. 295 _input_dynamic_archive_path = SharedArchiveFile; 296 _input_static_archive_path = base_archive_path; // has been c-heap allocated. 297 } 298 } else { 299 extract_archive_paths(SharedArchiveFile, 300 &_input_static_archive_path, &_input_dynamic_archive_path); 301 if (_input_static_archive_path == nullptr) { 302 assert(_input_dynamic_archive_path == nullptr, "must be"); 303 Arguments::no_shared_spaces("invalid archive"); 304 } 305 } 306 307 if (_input_dynamic_archive_path != nullptr) { 308 // Check for case (c) 309 if (RecordDynamicDumpInfo) { 310 vm_exit_during_initialization("-XX:+RecordDynamicDumpInfo is unsupported when a dynamic CDS archive is specified in -XX:SharedArchiveFile", 311 SharedArchiveFile); 312 } 313 if (ArchiveClassesAtExit != nullptr) { 314 vm_exit_during_initialization("-XX:ArchiveClassesAtExit is unsupported when a dynamic CDS archive is specified in -XX:SharedArchiveFile", 315 SharedArchiveFile); 316 } 317 } 318 319 if (ArchiveClassesAtExit != nullptr && os::same_files(SharedArchiveFile, ArchiveClassesAtExit)) { 320 vm_exit_during_initialization( 321 "Cannot have the same archive file specified for -XX:SharedArchiveFile and -XX:ArchiveClassesAtExit", 322 SharedArchiveFile); 323 } 324 } 325 } 326 } 327 328 static char* bad_module_prop_key = nullptr; 329 static char* bad_module_prop_value = nullptr; 330 331 void CDSConfig::check_internal_module_property(const char* key, const char* value) { 332 if (Arguments::is_incompatible_cds_internal_module_property(key)) { 333 stop_using_optimized_module_handling(); 334 if (bad_module_prop_key == nullptr) { 335 // We don't want to print an unconditional warning here, as we are still processing the command line. 336 // A later argument may specify something like -Xshare:off, which makes such a warning irrelevant. 337 // 338 // Instead, we save the info so we can warn when necessary: we are doing it only during AOT Cache 339 // creation for now, but could add it to other places. 340 bad_module_prop_key = os::strdup(key); 341 bad_module_prop_value = os::strdup(value); 342 } 343 aot_log_info(aot)("optimized module handling: disabled due to incompatible property: %s=%s", key, value); 344 } 345 } 346 347 void CDSConfig::check_incompatible_property(const char* key, const char* value) { 348 static const char* incompatible_properties[] = { 349 "java.system.class.loader", 350 "jdk.module.showModuleResolution", 351 "jdk.module.validation" 352 }; 353 354 for (const char* property : incompatible_properties) { 355 if (strcmp(key, property) == 0) { 356 stop_dumping_full_module_graph(); 357 stop_using_full_module_graph(); 358 aot_log_info(aot)("full module graph: disabled due to incompatible property: %s=%s", key, value); 359 break; 360 } 361 } 362 } 363 364 // Returns any JVM command-line option, such as "--patch-module", that's not supported by CDS. 365 static const char* find_any_unsupported_module_option() { 366 // Note that arguments.cpp has translated the command-line options into properties. If we find an 367 // unsupported property, translate it back to its command-line option for better error reporting. 368 369 // The following properties are checked by Arguments::is_internal_module_property() and cannot be 370 // directly specified in the command-line. 371 static const char* unsupported_module_properties[] = { 372 "jdk.module.limitmods", 373 "jdk.module.upgrade.path", 374 "jdk.module.patch.0" 375 }; 376 static const char* unsupported_module_options[] = { 377 "--limit-modules", 378 "--upgrade-module-path", 379 "--patch-module" 380 }; 381 382 assert(ARRAY_SIZE(unsupported_module_properties) == ARRAY_SIZE(unsupported_module_options), "must be"); 383 SystemProperty* sp = Arguments::system_properties(); 384 while (sp != nullptr) { 385 for (uint i = 0; i < ARRAY_SIZE(unsupported_module_properties); i++) { 386 if (strcmp(sp->key(), unsupported_module_properties[i]) == 0) { 387 return unsupported_module_options[i]; 388 } 389 } 390 sp = sp->next(); 391 } 392 393 return nullptr; // not found 394 } 395 396 void CDSConfig::check_unsupported_dumping_module_options() { 397 assert(is_dumping_archive(), "this function is only used with CDS dump time"); 398 const char* option = find_any_unsupported_module_option(); 399 if (option != nullptr) { 400 vm_exit_during_initialization("Cannot use the following option when dumping the shared archive", option); 401 } 402 // Check for an exploded module build in use with -Xshare:dump. 403 if (!Arguments::has_jimage()) { 404 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build"); 405 } 406 } 407 408 bool CDSConfig::has_unsupported_runtime_module_options() { 409 assert(is_using_archive(), "this function is only used with -Xshare:{on,auto}"); 410 if (ArchiveClassesAtExit != nullptr) { 411 // dynamic dumping, just return false for now. 412 // check_unsupported_dumping_properties() will be called later to check the same set of 413 // properties, and will exit the VM with the correct error message if the unsupported properties 414 // are used. 415 return false; 416 } 417 const char* option = find_any_unsupported_module_option(); 418 if (option != nullptr) { 419 if (RequireSharedSpaces) { 420 warning("CDS is disabled when the %s option is specified.", option); 421 } else { 422 if (new_aot_flags_used()) { 423 aot_log_warning(aot)("AOT cache is disabled when the %s option is specified.", option); 424 } else { 425 aot_log_info(aot)("CDS is disabled when the %s option is specified.", option); 426 } 427 } 428 return true; 429 } 430 return false; 431 } 432 433 #define CHECK_NEW_FLAG(f) check_new_flag(FLAG_IS_DEFAULT(f), #f) 434 435 void CDSConfig::check_new_flag(bool new_flag_is_default, const char* new_flag_name) { 436 if (old_cds_flags_used() && !new_flag_is_default) { 437 vm_exit_during_initialization(err_msg("Option %s cannot be used at the same time with " 438 "-Xshare:on, -Xshare:auto, -Xshare:off, -Xshare:dump, " 439 "DumpLoadedClassList, SharedClassListFile, or SharedArchiveFile", 440 new_flag_name)); 441 } 442 } 443 444 #define CHECK_SINGLE_PATH(f) check_flag_single_path(#f, f) 445 446 void CDSConfig::check_flag_single_path(const char* flag_name, const char* value) { 447 if (value != nullptr && num_archive_paths(value) != 1) { 448 vm_exit_during_initialization(err_msg("Option %s must specify a single file name", flag_name)); 449 } 450 } 451 452 void CDSConfig::check_aot_flags() { 453 if (!FLAG_IS_DEFAULT(DumpLoadedClassList) || 454 !FLAG_IS_DEFAULT(SharedClassListFile) || 455 !FLAG_IS_DEFAULT(SharedArchiveFile)) { 456 _old_cds_flags_used = true; 457 } 458 459 // "New" AOT flags must not be mixed with "classic" CDS flags such as -Xshare:dump 460 CHECK_NEW_FLAG(AOTCache); 461 CHECK_NEW_FLAG(AOTCacheOutput); 462 CHECK_NEW_FLAG(AOTConfiguration); 463 CHECK_NEW_FLAG(AOTMode); 464 465 CHECK_SINGLE_PATH(AOTCache); 466 CHECK_SINGLE_PATH(AOTCacheOutput); 467 CHECK_SINGLE_PATH(AOTConfiguration); 468 469 if (FLAG_IS_DEFAULT(AOTCache) && AOTAdapterCaching) { 470 log_debug(aot,codecache,init)("AOTCache is not specified - AOTAdapterCaching is ignored"); 471 } 472 if (FLAG_IS_DEFAULT(AOTCache) && AOTStubCaching) { 473 log_debug(aot,codecache,init)("AOTCache is not specified - AOTStubCaching is ignored"); 474 } 475 476 bool has_cache = !FLAG_IS_DEFAULT(AOTCache); 477 bool has_cache_output = !FLAG_IS_DEFAULT(AOTCacheOutput); 478 bool has_config = !FLAG_IS_DEFAULT(AOTConfiguration); 479 bool has_mode = !FLAG_IS_DEFAULT(AOTMode); 480 481 if (!has_cache && !has_cache_output && !has_config && !has_mode) { 482 // AOT flags are not used. Use classic CDS workflow 483 return; 484 } 485 486 if (has_cache && has_cache_output) { 487 vm_exit_during_initialization("Only one of AOTCache or AOTCacheOutput can be specified"); 488 } 489 490 if (!has_cache && (!has_mode || strcmp(AOTMode, "auto") == 0)) { 491 if (has_cache_output) { 492 // If AOTCacheOutput has been set, effective mode is "record". 493 // Default value for AOTConfiguration, if necessary, will be assigned in check_aotmode_record(). 494 log_info(aot)("Selected AOTMode=record because AOTCacheOutput is specified"); 495 FLAG_SET_ERGO(AOTMode, "record"); 496 } 497 } 498 499 // At least one AOT flag has been used 500 _new_aot_flags_used = true; 501 502 if (FLAG_IS_DEFAULT(AOTMode) || strcmp(AOTMode, "auto") == 0 || strcmp(AOTMode, "on") == 0) { 503 check_aotmode_auto_or_on(); 504 } else if (strcmp(AOTMode, "off") == 0) { 505 check_aotmode_off(); 506 } else if (strcmp(AOTMode, "record") == 0) { 507 check_aotmode_record(); 508 } else { 509 assert(strcmp(AOTMode, "create") == 0, "checked by AOTModeConstraintFunc"); 510 check_aotmode_create(); 511 } 512 } 513 514 void CDSConfig::check_aotmode_off() { 515 UseSharedSpaces = false; 516 RequireSharedSpaces = false; 517 } 518 519 void CDSConfig::check_aotmode_auto_or_on() { 520 if (!FLAG_IS_DEFAULT(AOTConfiguration)) { 521 vm_exit_during_initialization(err_msg("AOTConfiguration can only be used with when AOTMode is record or create (selected AOTMode = %s)", 522 FLAG_IS_DEFAULT(AOTMode) ? "auto" : AOTMode)); 523 } 524 525 UseSharedSpaces = true; 526 if (FLAG_IS_DEFAULT(AOTMode) || (strcmp(AOTMode, "auto") == 0)) { 527 RequireSharedSpaces = false; 528 } else { 529 assert(strcmp(AOTMode, "on") == 0, "already checked"); 530 RequireSharedSpaces = true; 531 } 532 } 533 534 // %p substitution in AOTCache, AOTCacheOutput and AOTCacheConfiguration 535 static void substitute_aot_filename(JVMFlagsEnum flag_enum) { 536 JVMFlag* flag = JVMFlag::flag_from_enum(flag_enum); 537 const char* filename = flag->read<const char*>(); 538 assert(filename != nullptr, "must not have default value"); 539 540 // For simplicity, we don't allow %p/%t to be specified twice, because make_log_name() 541 // substitutes only the first occurrence. Otherwise, if we run with 542 // java -XX:AOTCacheOutput=%p%p.aot 543 // it will end up with both the pid of the training process and the assembly process. 544 const char* first_p = strstr(filename, "%p"); 545 if (first_p != nullptr && strstr(first_p + 2, "%p") != nullptr) { 546 vm_exit_during_initialization(err_msg("%s cannot contain more than one %%p", flag->name())); 547 } 548 const char* first_t = strstr(filename, "%t"); 549 if (first_t != nullptr && strstr(first_t + 2, "%t") != nullptr) { 550 vm_exit_during_initialization(err_msg("%s cannot contain more than one %%t", flag->name())); 551 } 552 553 // Note: with single-command training, %p will be the pid of the training process, not the 554 // assembly process. 555 const char* new_filename = make_log_name(filename, nullptr); 556 if (strcmp(filename, new_filename) != 0) { 557 JVMFlag::Error err = JVMFlagAccess::set_ccstr(flag, &new_filename, JVMFlagOrigin::ERGONOMIC); 558 assert(err == JVMFlag::SUCCESS, "must never fail"); 559 } 560 FREE_C_HEAP_ARRAY(char, new_filename); 561 } 562 563 void CDSConfig::check_aotmode_record() { 564 bool has_config = !FLAG_IS_DEFAULT(AOTConfiguration); 565 bool has_output = !FLAG_IS_DEFAULT(AOTCacheOutput); 566 567 if (!has_output && !has_config) { 568 vm_exit_during_initialization("At least one of AOTCacheOutput and AOTConfiguration must be specified when using -XX:AOTMode=record"); 569 } 570 571 if (has_output) { 572 _is_single_command_training = true; 573 substitute_aot_filename(FLAG_MEMBER_ENUM(AOTCacheOutput)); 574 if (!has_config) { 575 // Too early; can't use resource allocation yet. 576 size_t len = strlen(AOTCacheOutput) + 10; 577 char* temp = AllocateHeap(len, mtArguments); 578 jio_snprintf(temp, len, "%s.config", AOTCacheOutput); 579 FLAG_SET_ERGO(AOTConfiguration, temp); 580 FreeHeap(temp); 581 _has_temp_aot_config_file = true; 582 } 583 } 584 585 if (!FLAG_IS_DEFAULT(AOTCache)) { 586 vm_exit_during_initialization("AOTCache must not be specified when using -XX:AOTMode=record"); 587 } 588 589 substitute_aot_filename(FLAG_MEMBER_ENUM(AOTConfiguration)); 590 591 UseSharedSpaces = false; 592 RequireSharedSpaces = false; 593 _is_dumping_static_archive = true; 594 _is_dumping_preimage_static_archive = true; 595 596 // At VM exit, the module graph may be contaminated with program states. 597 // We will rebuild the module graph when dumping the CDS final image. 598 disable_heap_dumping(); 599 } 600 601 void CDSConfig::check_aotmode_create() { 602 if (FLAG_IS_DEFAULT(AOTConfiguration)) { 603 vm_exit_during_initialization("AOTConfiguration must be specified when using -XX:AOTMode=create"); 604 } 605 606 bool has_cache = !FLAG_IS_DEFAULT(AOTCache); 607 bool has_cache_output = !FLAG_IS_DEFAULT(AOTCacheOutput); 608 609 assert(!(has_cache && has_cache_output), "already checked"); 610 611 if (!has_cache && !has_cache_output) { 612 vm_exit_during_initialization("AOTCache or AOTCacheOutput must be specified when using -XX:AOTMode=create"); 613 } 614 615 if (!has_cache) { 616 precond(has_cache_output); 617 FLAG_SET_ERGO(AOTCache, AOTCacheOutput); 618 } 619 // No need to check for (!has_cache_output), as we don't look at AOTCacheOutput after here. 620 621 substitute_aot_filename(FLAG_MEMBER_ENUM(AOTCache)); 622 623 _is_dumping_final_static_archive = true; 624 UseSharedSpaces = true; 625 RequireSharedSpaces = true; 626 627 if (!FileMapInfo::is_preimage_static_archive(AOTConfiguration)) { 628 vm_exit_during_initialization("Must be a valid AOT configuration generated by the current JVM", AOTConfiguration); 629 } 630 631 CDSConfig::enable_dumping_static_archive(); 632 633 // We don't load any agents in the assembly phase, so we can ensure that the agents 634 // cannot affect the contents of the AOT cache. E.g., we don't want the agents to 635 // redefine any cached classes. We also don't want the agents to modify heap objects that 636 // are cached. 637 // 638 // Since application is not executed in the assembly phase, there's no need to load 639 // the agents anyway -- no one will notice that the agents are not loaded. 640 log_info(aot)("Disabled all JVMTI agents during -XX:AOTMode=create"); 641 JvmtiAgentList::disable_agent_list(); 642 } 643 644 void CDSConfig::ergo_init_aot_paths() { 645 assert(_cds_ergo_initialize_started, "sanity"); 646 if (is_dumping_static_archive()) { 647 if (is_dumping_preimage_static_archive()) { 648 _output_archive_path = AOTConfiguration; 649 } else { 650 assert(is_dumping_final_static_archive(), "must be"); 651 _input_static_archive_path = AOTConfiguration; 652 _output_archive_path = AOTCache; 653 } 654 } else if (is_using_archive()) { 655 if (FLAG_IS_DEFAULT(AOTCache)) { 656 // Only -XX:AOTMode={auto,on} is specified 657 _input_static_archive_path = default_archive_path(); 658 } else { 659 _input_static_archive_path = AOTCache; 660 } 661 } 662 } 663 664 bool CDSConfig::check_vm_args_consistency(bool patch_mod_javabase, bool mode_flag_cmd_line) { 665 assert(!_cds_ergo_initialize_started, "This is called earlier than CDSConfig::ergo_initialize()"); 666 667 check_aot_flags(); 668 669 if (!FLAG_IS_DEFAULT(AOTMode)) { 670 // Using any form of the new AOTMode switch enables enhanced optimizations. 671 FLAG_SET_ERGO_IF_DEFAULT(AOTClassLinking, true); 672 } 673 674 setup_compiler_args(); 675 676 if (AOTClassLinking) { 677 // If AOTClassLinking is specified, enable all these optimizations by default. 678 FLAG_SET_ERGO_IF_DEFAULT(AOTInvokeDynamicLinking, true); 679 FLAG_SET_ERGO_IF_DEFAULT(ArchiveDynamicProxies, true); 680 FLAG_SET_ERGO_IF_DEFAULT(ArchiveLoaderLookupCache, true); 681 FLAG_SET_ERGO_IF_DEFAULT(ArchiveReflectionData, true); 682 683 // For simplicity, enable these by default only for new workflow 684 if (new_aot_flags_used()) { 685 // These flags will be removed when JDK-8350550 is merged from mainline 686 FLAG_SET_ERGO_IF_DEFAULT(ArchivePackages, true); 687 FLAG_SET_ERGO_IF_DEFAULT(ArchiveProtectionDomains, true); 688 } 689 } else { 690 // All of these *might* depend on AOTClassLinking. Better be safe than sorry. 691 FLAG_SET_ERGO(AOTInvokeDynamicLinking, false); 692 FLAG_SET_ERGO(ArchiveDynamicProxies, false); 693 FLAG_SET_ERGO(ArchiveLoaderLookupCache, false); 694 FLAG_SET_ERGO(ArchivePackages, false); 695 FLAG_SET_ERGO(ArchiveProtectionDomains, false); 696 FLAG_SET_ERGO(ArchiveReflectionData, false); 697 698 if (CDSConfig::is_dumping_archive()) { 699 FLAG_SET_ERGO(AOTRecordTraining, false); 700 FLAG_SET_ERGO(AOTReplayTraining, false); 701 AOTCodeCache::disable_caching(); 702 } 703 } 704 if (is_dumping_static_archive()) { 705 if (is_dumping_preimage_static_archive()) { 706 // Don't tweak execution mode during AOT training run 707 } else if (is_dumping_final_static_archive()) { 708 if (Arguments::mode() == Arguments::_comp) { 709 // AOT assembly phase submits the non-blocking compilation requests 710 // for methods collected during training run, then waits for all compilations 711 // to complete. With -Xcomp, we block for each compilation request, which is 712 // counter-productive. Switching back to mixed mode improves testing time 713 // with AOT and -Xcomp. 714 Arguments::set_mode_flags(Arguments::_mixed); 715 } 716 } else if (!mode_flag_cmd_line) { 717 // By default, -Xshare:dump runs in interpreter-only mode, which is required for deterministic archive. 718 // 719 // If your classlist is large and you don't care about deterministic dumping, you can use 720 // -Xshare:dump -Xmixed to improve dumping speed. 721 Arguments::set_mode_flags(Arguments::_int); 722 } else if (Arguments::mode() == Arguments::_comp) { 723 // -Xcomp may use excessive CPU for the test tiers. Also, -Xshare:dump runs a small and fixed set of 724 // Java code, so there's not much benefit in running -Xcomp. 725 aot_log_info(aot)("reduced -Xcomp to -Xmixed for static dumping"); 726 Arguments::set_mode_flags(Arguments::_mixed); 727 } 728 729 // String deduplication may cause CDS to iterate the strings in different order from one 730 // run to another which resulting in non-determinstic CDS archives. 731 // Disable UseStringDeduplication while dumping CDS archive. 732 UseStringDeduplication = false; 733 } 734 735 // RecordDynamicDumpInfo is not compatible with ArchiveClassesAtExit 736 if (ArchiveClassesAtExit != nullptr && RecordDynamicDumpInfo) { 737 jio_fprintf(defaultStream::output_stream(), 738 "-XX:+RecordDynamicDumpInfo cannot be used with -XX:ArchiveClassesAtExit.\n"); 739 return false; 740 } 741 742 if (ArchiveClassesAtExit == nullptr && !RecordDynamicDumpInfo) { 743 disable_dumping_dynamic_archive(); 744 } else { 745 enable_dumping_dynamic_archive(ArchiveClassesAtExit); 746 } 747 748 if (AutoCreateSharedArchive) { 749 if (SharedArchiveFile == nullptr) { 750 aot_log_warning(aot)("-XX:+AutoCreateSharedArchive requires -XX:SharedArchiveFile"); 751 return false; 752 } 753 if (ArchiveClassesAtExit != nullptr) { 754 aot_log_warning(aot)("-XX:+AutoCreateSharedArchive does not work with ArchiveClassesAtExit"); 755 return false; 756 } 757 } 758 759 if (is_using_archive() && patch_mod_javabase) { 760 Arguments::no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched."); 761 } 762 if (is_using_archive() && has_unsupported_runtime_module_options()) { 763 UseSharedSpaces = false; 764 } 765 766 if (is_dumping_archive()) { 767 // Always verify non-system classes during CDS dump 768 if (!BytecodeVerificationRemote) { 769 BytecodeVerificationRemote = true; 770 aot_log_info(aot)("All non-system classes will be verified (-Xverify:remote) during CDS dump time."); 771 } 772 } 773 774 if (AOTClassLinking) { 775 if (is_dumping_final_static_archive() && !is_dumping_full_module_graph()) { 776 if (bad_module_prop_key != nullptr) { 777 log_warning(cds)("optimized module handling/full module graph: disabled due to incompatible property: %s=%s", 778 bad_module_prop_key, bad_module_prop_value); 779 } 780 vm_exit_during_initialization("AOT cache cannot be created because AOTClassLinking is enabled but full module graph is disabled"); 781 } 782 } 783 784 return true; 785 } 786 787 void CDSConfig::setup_compiler_args() { 788 // AOT profiles and AOT-compiled methods are supported only in the JEP 483 workflow. 789 bool can_dump_profile_and_compiled_code = !CompilerConfig::is_interpreter_only() && AOTClassLinking && new_aot_flags_used(); 790 bool can_use_profile_and_compiled_code = !CompilerConfig::is_interpreter_only() && new_aot_flags_used(); 791 792 if (is_dumping_preimage_static_archive() && can_dump_profile_and_compiled_code) { 793 // JEP 483 workflow -- training 794 FLAG_SET_ERGO_IF_DEFAULT(AOTRecordTraining, true); 795 FLAG_SET_ERGO(AOTReplayTraining, false); 796 AOTCodeCache::disable_caching(); // No AOT code generation during training run 797 FLAG_SET_ERGO(UseAOTCodeLoadThread, false); 798 } else if (is_dumping_final_static_archive() && can_dump_profile_and_compiled_code) { 799 // JEP 483 workflow -- assembly 800 FLAG_SET_ERGO(AOTRecordTraining, false); 801 FLAG_SET_ERGO_IF_DEFAULT(AOTReplayTraining, true); 802 AOTCodeCache::enable_caching(); // Generate AOT code during assembly phase. 803 FLAG_SET_ERGO(UseAOTCodeLoadThread, false); 804 disable_dumping_aot_code(); // Don't dump AOT code until metadata and heap are dumped. 805 } else if (is_using_archive() && can_use_profile_and_compiled_code) { 806 // JEP 483 workflow -- production 807 FLAG_SET_ERGO(AOTRecordTraining, false); 808 FLAG_SET_ERGO_IF_DEFAULT(AOTReplayTraining, true); 809 AOTCodeCache::enable_caching(); 810 FLAG_SET_ERGO_IF_DEFAULT(UseAOTCodeLoadThread, true); 811 } else { 812 FLAG_SET_ERGO(AOTReplayTraining, false); 813 FLAG_SET_ERGO(AOTRecordTraining, false); 814 AOTCodeCache::disable_caching(); 815 FLAG_SET_ERGO(UseAOTCodeLoadThread, false); 816 } 817 } 818 819 void CDSConfig::prepare_for_dumping() { 820 assert(CDSConfig::is_dumping_archive(), "sanity"); 821 822 if (is_dumping_dynamic_archive() && AOTClassLinking) { 823 if (FLAG_IS_CMDLINE(AOTClassLinking)) { 824 log_warning(cds)("AOTClassLinking is not supported for dynamic CDS archive"); 825 } 826 FLAG_SET_ERGO(AOTClassLinking, false); 827 } 828 829 if (is_dumping_dynamic_archive() && !is_using_archive()) { 830 assert(!is_dumping_static_archive(), "cannot be dumping both static and dynamic archives"); 831 832 // This could happen if SharedArchiveFile has failed to load: 833 // - -Xshare:off was specified 834 // - SharedArchiveFile points to an non-existent file. 835 // - SharedArchiveFile points to an archive that has failed CRC check 836 // - SharedArchiveFile is not specified and the VM doesn't have a compatible default archive 837 838 #define __THEMSG " is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info." 839 if (RecordDynamicDumpInfo) { 840 aot_log_error(aot)("-XX:+RecordDynamicDumpInfo%s", __THEMSG); 841 AOTMetaspace::unrecoverable_loading_error(); 842 } else { 843 assert(ArchiveClassesAtExit != nullptr, "sanity"); 844 aot_log_warning(aot)("-XX:ArchiveClassesAtExit" __THEMSG); 845 } 846 #undef __THEMSG 847 disable_dumping_dynamic_archive(); 848 return; 849 } 850 851 check_unsupported_dumping_module_options(); 852 } 853 854 bool CDSConfig::is_dumping_classic_static_archive() { 855 return _is_dumping_static_archive && 856 !is_dumping_preimage_static_archive() && 857 !is_dumping_final_static_archive(); 858 } 859 860 bool CDSConfig::is_dumping_preimage_static_archive() { 861 return _is_dumping_preimage_static_archive; 862 } 863 864 bool CDSConfig::is_dumping_preimage_static_archive_with_triggers() { 865 return (!FLAG_IS_DEFAULT(AOTEndTrainingOnMethodEntry)) && is_dumping_preimage_static_archive(); 866 } 867 868 bool CDSConfig::is_dumping_final_static_archive() { 869 return _is_dumping_final_static_archive; 870 } 871 872 void CDSConfig::enable_dumping_dynamic_archive(const char* output_path) { 873 _is_dumping_dynamic_archive = true; 874 if (output_path == nullptr) { 875 // output_path can be null when the VM is started with -XX:+RecordDynamicDumpInfo 876 // in anticipation of "jcmd VM.cds dynamic_dump", which will provide the actual 877 // output path. 878 _output_archive_path = nullptr; 879 } else { 880 _output_archive_path = os::strdup_check_oom(output_path, mtArguments); 881 } 882 } 883 884 bool CDSConfig::allow_only_single_java_thread() { 885 // See comments in JVM_StartThread() 886 return is_dumping_classic_static_archive() || is_dumping_final_static_archive(); 887 } 888 889 bool CDSConfig::is_logging_dynamic_proxies() { 890 return ClassListWriter::is_enabled() || is_dumping_preimage_static_archive(); 891 } 892 893 bool CDSConfig::is_using_archive() { 894 return UseSharedSpaces; 895 } 896 897 bool CDSConfig::is_using_only_default_archive() { 898 return is_using_archive() && 899 input_static_archive_path() != nullptr && 900 default_archive_path() != nullptr && 901 strcmp(input_static_archive_path(), default_archive_path()) == 0 && 902 input_dynamic_archive_path() == nullptr; 903 } 904 905 bool CDSConfig::is_logging_lambda_form_invokers() { 906 return ClassListWriter::is_enabled() || is_dumping_dynamic_archive() || is_dumping_preimage_static_archive(); 907 } 908 909 bool CDSConfig::is_dumping_regenerated_lambdaform_invokers() { 910 if (is_dumping_final_static_archive()) { 911 // No need to regenerate -- the lambda form invokers should have been regenerated 912 // in the preimage archive (if allowed) 913 return false; 914 } else if (is_dumping_dynamic_archive() && is_using_aot_linked_classes()) { 915 // The base archive has aot-linked classes that may have AOT-resolved CP references 916 // that point to the lambda form invokers in the base archive. Such pointers will 917 // be invalid if lambda form invokers are regenerated in the dynamic archive. 918 return false; 919 } else { 920 return is_dumping_archive(); 921 } 922 } 923 924 void CDSConfig::stop_using_optimized_module_handling() { 925 _is_using_optimized_module_handling = false; 926 _is_dumping_full_module_graph = false; // This requires is_using_optimized_module_handling() 927 _is_using_full_module_graph = false; // This requires is_using_optimized_module_handling() 928 } 929 930 931 CDSConfig::DumperThreadMark::DumperThreadMark(JavaThread* current) { 932 assert(_dumper_thread == nullptr, "sanity"); 933 _dumper_thread = current; 934 } 935 936 CDSConfig::DumperThreadMark::~DumperThreadMark() { 937 assert(_dumper_thread != nullptr, "sanity"); 938 _dumper_thread = nullptr; 939 } 940 941 bool CDSConfig::current_thread_is_vm_or_dumper() { 942 Thread* t = Thread::current(); 943 return t->is_VM_thread() || t == _dumper_thread; 944 } 945 946 bool CDSConfig::current_thread_is_dumper() { 947 return Thread::current() == _dumper_thread; 948 } 949 950 const char* CDSConfig::type_of_archive_being_loaded() { 951 if (is_dumping_final_static_archive()) { 952 return "AOT configuration file"; 953 } else if (new_aot_flags_used()) { 954 return "AOT cache"; 955 } else { 956 return "shared archive file"; 957 } 958 } 959 960 const char* CDSConfig::type_of_archive_being_written() { 961 if (is_dumping_preimage_static_archive()) { 962 return "AOT configuration file"; 963 } else if (new_aot_flags_used()) { 964 return "AOT cache"; 965 } else { 966 return "shared archive file"; 967 } 968 } 969 970 // If an incompatible VM options is found, return a text message that explains why 971 static const char* check_options_incompatible_with_dumping_heap() { 972 #if INCLUDE_CDS_JAVA_HEAP 973 if (!UseCompressedClassPointers) { 974 return "UseCompressedClassPointers must be true"; 975 } 976 977 // Almost all GCs support heap region dump, except ZGC (so far). 978 if (UseZGC) { 979 return "ZGC is not supported"; 980 } 981 982 return nullptr; 983 #else 984 return "JVM not configured for writing Java heap objects"; 985 #endif 986 } 987 988 void CDSConfig::log_reasons_for_not_dumping_heap() { 989 const char* reason; 990 991 assert(!is_dumping_heap(), "sanity"); 992 993 if (_disable_heap_dumping) { 994 reason = "Programmatically disabled"; 995 } else { 996 reason = check_options_incompatible_with_dumping_heap(); 997 } 998 999 assert(reason != nullptr, "sanity"); 1000 aot_log_info(aot)("Archived java heap is not supported: %s", reason); 1001 } 1002 1003 // This is *Legacy* optimization for lambdas before JEP 483. May be removed in the future. 1004 bool CDSConfig::is_dumping_lambdas_in_legacy_mode() { 1005 return !is_dumping_method_handles(); 1006 } 1007 1008 bool CDSConfig::is_preserving_verification_constraints() { 1009 // Verification dependencies are classes used in assignability checks by the 1010 // bytecode verifier. In the following example, the verification dependencies 1011 // for X are A and B. 1012 // 1013 // class X { 1014 // A getA() { return new B(); } 1015 // } 1016 // 1017 // With the AOT cache, we can ensure that all the verification dependencies 1018 // (A and B in the above example) are unconditionally loaded during the bootstrap 1019 // of the production run. This means that if a class was successfully verified 1020 // in the assembly phase, all of the verifier's assignability checks will remain 1021 // valid in the production run, so we don't need to verify aot-linked classes again. 1022 1023 if (is_dumping_preimage_static_archive()) { // writing AOT config 1024 return AOTClassLinking; 1025 } else if (is_dumping_final_static_archive()) { // writing AOT cache 1026 return is_dumping_aot_linked_classes(); 1027 } else { 1028 // For simplicity, we don't support this optimization with the old CDS workflow. 1029 return false; 1030 } 1031 } 1032 1033 bool CDSConfig::is_old_class_for_verifier(const InstanceKlass* ik) { 1034 return ik->major_version() < 50 /*JAVA_6_VERSION*/; 1035 } 1036 1037 #if INCLUDE_CDS_JAVA_HEAP 1038 bool CDSConfig::are_vm_options_incompatible_with_dumping_heap() { 1039 return check_options_incompatible_with_dumping_heap() != nullptr; 1040 } 1041 1042 bool CDSConfig::is_dumping_heap() { 1043 if (!(is_dumping_classic_static_archive() || is_dumping_final_static_archive()) 1044 || are_vm_options_incompatible_with_dumping_heap() 1045 || _disable_heap_dumping) { 1046 return false; 1047 } 1048 return true; 1049 } 1050 1051 bool CDSConfig::is_loading_heap() { 1052 return ArchiveHeapLoader::is_in_use(); 1053 } 1054 1055 bool CDSConfig::is_using_full_module_graph() { 1056 if (ClassLoaderDataShared::is_full_module_graph_loaded()) { 1057 return true; 1058 } 1059 1060 if (!_is_using_full_module_graph) { 1061 return false; 1062 } 1063 1064 if (is_using_archive() && ArchiveHeapLoader::can_use()) { 1065 // Classes used by the archived full module graph are loaded in JVMTI early phase. 1066 assert(!(JvmtiExport::should_post_class_file_load_hook() && JvmtiExport::has_early_class_hook_env()), 1067 "CDS should be disabled if early class hooks are enabled"); 1068 return true; 1069 } else { 1070 _is_using_full_module_graph = false; 1071 return false; 1072 } 1073 } 1074 1075 void CDSConfig::stop_dumping_full_module_graph(const char* reason) { 1076 if (_is_dumping_full_module_graph) { 1077 _is_dumping_full_module_graph = false; 1078 if (reason != nullptr) { 1079 aot_log_info(aot)("full module graph cannot be dumped: %s", reason); 1080 } 1081 } 1082 } 1083 1084 void CDSConfig::stop_using_full_module_graph(const char* reason) { 1085 assert(!ClassLoaderDataShared::is_full_module_graph_loaded(), "you call this function too late!"); 1086 if (_is_using_full_module_graph) { 1087 _is_using_full_module_graph = false; 1088 if (reason != nullptr) { 1089 aot_log_info(aot)("full module graph cannot be loaded: %s", reason); 1090 } 1091 } 1092 } 1093 1094 bool CDSConfig::is_dumping_aot_linked_classes() { 1095 if (is_dumping_classic_static_archive() || is_dumping_final_static_archive()) { 1096 // FMG is required to guarantee that all cached boot/platform/app classes 1097 // are visible in the production run, so they can be unconditionally 1098 // loaded during VM bootstrap. 1099 return is_dumping_full_module_graph() && AOTClassLinking; 1100 } else { 1101 return false; 1102 } 1103 } 1104 1105 bool CDSConfig::is_using_aot_linked_classes() { 1106 // Make sure we have the exact same module graph as in the assembly phase, or else 1107 // some aot-linked classes may not be visible so cannot be loaded. 1108 return is_using_full_module_graph() && _has_aot_linked_classes; 1109 } 1110 1111 bool CDSConfig::is_dumping_dynamic_proxies() { 1112 return is_dumping_full_module_graph() && is_dumping_invokedynamic() && ArchiveDynamicProxies; 1113 } 1114 1115 void CDSConfig::set_has_aot_linked_classes(bool has_aot_linked_classes) { 1116 _has_aot_linked_classes |= has_aot_linked_classes; 1117 } 1118 1119 bool CDSConfig::is_initing_classes_at_dump_time() { 1120 return is_dumping_heap() && is_dumping_aot_linked_classes(); 1121 } 1122 1123 bool CDSConfig::is_dumping_invokedynamic() { 1124 // Requires is_dumping_aot_linked_classes(). Otherwise the classes of some archived heap 1125 // objects used by the archive indy callsites may be replaced at runtime. 1126 return AOTInvokeDynamicLinking && is_dumping_aot_linked_classes() && is_dumping_heap(); 1127 } 1128 1129 bool CDSConfig::is_dumping_reflection_data() { 1130 // reflection data use LambdaForm classes 1131 return ArchiveReflectionData && is_dumping_invokedynamic(); 1132 } 1133 1134 // When we are dumping aot-linked classes and we are able to write archived heap objects, we automatically 1135 // enable the archiving of MethodHandles. This will in turn enable the archiving of MethodTypes and hidden 1136 // classes that are used in the implementation of MethodHandles. 1137 // Archived MethodHandles are required for higher-level optimizations such as AOT resolution of invokedynamic 1138 // and dynamic proxies. 1139 bool CDSConfig::is_dumping_method_handles() { 1140 return is_initing_classes_at_dump_time(); 1141 } 1142 1143 #endif // INCLUDE_CDS_JAVA_HEAP 1144 1145 // AOT code generation and its archiving is disabled by default. 1146 // We enable it only in the final image dump after the metadata and heap are dumped. 1147 // This affects only JITed code because it may have embedded oops and metadata pointers 1148 // which AOT code encodes as offsets in final CDS archive regions. 1149 1150 static bool _is_dumping_aot_code = false; 1151 1152 bool CDSConfig::is_dumping_aot_code() { 1153 return _is_dumping_aot_code; 1154 } 1155 1156 void CDSConfig::disable_dumping_aot_code() { 1157 _is_dumping_aot_code = false; 1158 } 1159 1160 void CDSConfig::enable_dumping_aot_code() { 1161 _is_dumping_aot_code = true; 1162 } 1163 1164 bool CDSConfig::is_dumping_adapters() { 1165 return (AOTAdapterCaching && is_dumping_final_static_archive()); 1166 }