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/archiveHeapLoader.hpp"
26 #include "cds/cdsConfig.hpp"
27 #include "cds/cds_globals.hpp"
28 #include "cds/classListWriter.hpp"
29 #include "cds/filemap.hpp"
30 #include "cds/heapShared.hpp"
31 #include "cds/metaspaceShared.hpp"
32 #include "classfile/classLoaderDataShared.hpp"
33 #include "classfile/moduleEntry.hpp"
34 #include "classfile/systemDictionaryShared.hpp"
35 #include "code/aotCodeCache.hpp"
36 #include "include/jvm_io.h"
37 #include "logging/log.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "memory/universe.hpp"
40 #include "runtime/arguments.hpp"
41 #include "runtime/globals_extension.hpp"
42 #include "runtime/java.hpp"
43 #include "runtime/vmThread.hpp"
44 #include "utilities/defaultStream.hpp"
45 #include "utilities/formatBuffer.hpp"
46
47 bool CDSConfig::_is_dumping_static_archive = false;
48 bool CDSConfig::_is_dumping_preimage_static_archive = false;
49 bool CDSConfig::_is_dumping_final_static_archive = false;
50 bool CDSConfig::_is_dumping_dynamic_archive = false;
51 bool CDSConfig::_is_using_optimized_module_handling = true;
52 bool CDSConfig::_is_dumping_full_module_graph = true;
53 bool CDSConfig::_is_using_full_module_graph = true;
54 bool CDSConfig::_has_aot_linked_classes = false;
55 bool CDSConfig::_is_one_step_training = false;
56 bool CDSConfig::_has_temp_aot_config_file = false;
57 bool CDSConfig::_is_loading_packages = false;
58 bool CDSConfig::_is_loading_protection_domains = false;
59 bool CDSConfig::_is_security_manager_allowed = false;
60 bool CDSConfig::_old_cds_flags_used = false;
61 bool CDSConfig::_new_aot_flags_used = false;
62 bool CDSConfig::_experimental_leyden_flags_used = false;
63 bool CDSConfig::_disable_heap_dumping = false;
64
65 const char* CDSConfig::_default_archive_path = nullptr;
66 const char* CDSConfig::_input_static_archive_path = nullptr;
67 const char* CDSConfig::_input_dynamic_archive_path = nullptr;
68 const char* CDSConfig::_output_archive_path = nullptr;
69
70 JavaThread* CDSConfig::_dumper_thread = nullptr;
71
72 int CDSConfig::get_status() {
73 assert(Universe::is_fully_initialized(), "status is finalized only after Universe is initialized");
74 return (is_dumping_archive() ? IS_DUMPING_ARCHIVE : 0) |
75 (is_dumping_method_handles() ? IS_DUMPING_METHOD_HANDLES : 0) |
76 (is_dumping_static_archive() ? IS_DUMPING_STATIC_ARCHIVE : 0) |
77 (is_logging_lambda_form_invokers() ? IS_LOGGING_LAMBDA_FORM_INVOKERS : 0) |
78 (is_using_archive() ? IS_USING_ARCHIVE : 0) |
79 (is_dumping_heap() ? IS_DUMPING_HEAP : 0) |
80 (is_logging_dynamic_proxies() ? IS_LOGGING_DYNAMIC_PROXIES : 0) |
81 (is_dumping_packages() ? IS_DUMPING_PACKAGES : 0) |
82 (is_dumping_protection_domains() ? IS_DUMPING_PROTECTION_DOMAINS : 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 // If dumping the classic archive, or making an AOT training run (dumping a preimage archive),
92 // for sanity, parse all classes from classfiles.
93 // TODO: in the future, if we want to support re-training on top of an existing AOT cache, this
94 // needs to be changed.
95 if (RequireSharedSpaces) {
96 if (is_experimental_leyden_workflow()) {
97 log_info(cds)("-Xshare:on flag is ignored when creating a CacheDataStore");
98 } else {
99 // -Xshare and -XX:AOTMode flags are mutually exclusive:
100 // Class workflow: -Xshare:on and -Xshare:dump cannot take effect at the same time.
101 // JEP 483 workflow: -XX:AOTMode:record and -XX:AOTMode=on cannot take effect at the same time.
102 ShouldNotReachHere();
103 }
104 }
105 UseSharedSpaces = false;
106 }
107
108 // Initialize shared archive paths which could include both base and dynamic archive paths
109 // This must be after set_ergonomics_flags() called so flag UseCompressedOops is set properly.
110 if (is_dumping_static_archive() || is_using_archive()) {
111 if (new_aot_flags_used()) {
112 ergo_init_aot_paths();
113 } else if (is_experimental_leyden_workflow()) {
114 ergo_init_experimental_leyden_paths();
115 } else {
116 ergo_init_classic_archive_paths();
117 }
118 }
119
120 if (!is_dumping_heap()) {
121 _is_dumping_full_module_graph = false;
122 }
123 }
124
125 const char* CDSConfig::default_archive_path() {
126 // The path depends on UseCompressedOops, etc, which are set by GC ergonomics just
127 // before CDSConfig::ergo_initialize() is called.
128 assert(_cds_ergo_initialize_started, "sanity");
129 if (_default_archive_path == nullptr) {
130 stringStream tmp;
131 const char* subdir = WINDOWS_ONLY("bin") NOT_WINDOWS("lib");
132 tmp.print("%s%s%s%s%s%sclasses", Arguments::get_java_home(), os::file_separator(), subdir,
133 os::file_separator(), Abstract_VM_Version::vm_variant(), os::file_separator());
134 #ifdef _LP64
135 if (!UseCompressedOops) {
136 tmp.print_raw("_nocoops");
137 }
138 if (UseCompactObjectHeaders) {
139 // Note that generation of xxx_coh.jsa variants require
140 // --enable-cds-archive-coh at build time
141 tmp.print_raw("_coh");
142 }
143 #endif
144 tmp.print_raw(".jsa");
145 _default_archive_path = os::strdup(tmp.base());
146 }
147 return _default_archive_path;
148 }
149
150 int CDSConfig::num_archive_paths(const char* path_spec) {
151 if (path_spec == nullptr) {
152 return 0;
153 }
154 int npaths = 1;
155 char* p = (char*)path_spec;
156 while (*p != '\0') {
157 if (*p == os::path_separator()[0]) {
158 npaths++;
159 }
160 p++;
161 }
162 return npaths;
163 }
164
165 void CDSConfig::extract_archive_paths(const char* archive_path,
166 const char** base_archive_path,
167 const char** top_archive_path) {
168 char* begin_ptr = (char*)archive_path;
169 char* end_ptr = strchr((char*)archive_path, os::path_separator()[0]);
170 if (end_ptr == nullptr || end_ptr == begin_ptr) {
171 vm_exit_during_initialization("Base archive was not specified", archive_path);
172 }
173 size_t len = end_ptr - begin_ptr;
174 char* cur_path = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal);
175 strncpy(cur_path, begin_ptr, len);
176 cur_path[len] = '\0';
177 *base_archive_path = cur_path;
178
179 begin_ptr = ++end_ptr;
180 if (*begin_ptr == '\0') {
181 vm_exit_during_initialization("Top archive was not specified", archive_path);
182 }
183 end_ptr = strchr(begin_ptr, '\0');
184 assert(end_ptr != nullptr, "sanity");
185 len = end_ptr - begin_ptr;
186 cur_path = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal);
187 strncpy(cur_path, begin_ptr, len + 1);
188 *top_archive_path = cur_path;
189 }
190
191 void CDSConfig::ergo_init_classic_archive_paths() {
192 assert(_cds_ergo_initialize_started, "sanity");
193 if (ArchiveClassesAtExit != nullptr) {
194 assert(!RecordDynamicDumpInfo, "already checked");
195 if (is_dumping_static_archive()) {
196 vm_exit_during_initialization("-XX:ArchiveClassesAtExit cannot be used with -Xshare:dump");
197 }
198 check_unsupported_dumping_module_options();
199
200 if (os::same_files(default_archive_path(), ArchiveClassesAtExit)) {
201 vm_exit_during_initialization(
202 "Cannot specify the default CDS archive for -XX:ArchiveClassesAtExit", default_archive_path());
203 }
204 }
205
206 if (SharedArchiveFile == nullptr) {
207 _input_static_archive_path = default_archive_path();
208 if (is_dumping_static_archive()) {
209 _output_archive_path = _input_static_archive_path;
210 }
211 } else {
212 int num_archives = num_archive_paths(SharedArchiveFile);
213 assert(num_archives > 0, "must be");
214
215 if (is_dumping_archive() && num_archives > 1) {
216 vm_exit_during_initialization(
217 "Cannot have more than 1 archive file specified in -XX:SharedArchiveFile during CDS dumping");
218 }
219
220 if (is_dumping_static_archive()) {
221 assert(num_archives == 1, "just checked above");
222 // Static dump is simple: only one archive is allowed in SharedArchiveFile. This file
223 // will be overwritten regardless of its contents
224 _output_archive_path = SharedArchiveFile;
225 } else {
226 // SharedArchiveFile may specify one or two files. In case (c), the path for base.jsa
227 // is read from top.jsa
228 // (a) 1 file: -XX:SharedArchiveFile=base.jsa
229 // (b) 2 files: -XX:SharedArchiveFile=base.jsa:top.jsa
230 // (c) 2 files: -XX:SharedArchiveFile=top.jsa
231 //
232 // However, if either RecordDynamicDumpInfo or ArchiveClassesAtExit is used, we do not
233 // allow cases (b) and (c). Case (b) is already checked above.
234
235 if (num_archives > 2) {
236 vm_exit_during_initialization(
237 "Cannot have more than 2 archive files specified in the -XX:SharedArchiveFile option");
238 }
239
240 if (num_archives == 1) {
241 const char* base_archive_path = nullptr;
242 bool success =
243 FileMapInfo::get_base_archive_name_from_header(SharedArchiveFile, &base_archive_path);
244 if (!success) {
245 // If +AutoCreateSharedArchive and the specified shared archive does not exist,
246 // regenerate the dynamic archive base on default archive.
247 if (AutoCreateSharedArchive && !os::file_exists(SharedArchiveFile)) {
248 enable_dumping_dynamic_archive(SharedArchiveFile);
249 FLAG_SET_ERGO(ArchiveClassesAtExit, SharedArchiveFile);
250 _input_static_archive_path = default_archive_path();
251 FLAG_SET_ERGO(SharedArchiveFile, nullptr);
252 } else {
253 if (AutoCreateSharedArchive) {
254 warning("-XX:+AutoCreateSharedArchive is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info.");
255 AutoCreateSharedArchive = false;
256 }
257 log_error(cds)("Not a valid archive (%s)", SharedArchiveFile);
258 Arguments::no_shared_spaces("invalid archive");
259 }
260 } else if (base_archive_path == nullptr) {
261 // User has specified a single archive, which is a static archive.
262 _input_static_archive_path = SharedArchiveFile;
263 } else {
264 // User has specified a single archive, which is a dynamic archive.
265 _input_dynamic_archive_path = SharedArchiveFile;
266 _input_static_archive_path = base_archive_path; // has been c-heap allocated.
267 }
268 } else {
269 extract_archive_paths(SharedArchiveFile,
270 &_input_static_archive_path, &_input_dynamic_archive_path);
271 if (_input_static_archive_path == nullptr) {
272 assert(_input_dynamic_archive_path == nullptr, "must be");
273 Arguments::no_shared_spaces("invalid archive");
274 }
275 }
276
277 if (_input_dynamic_archive_path != nullptr) {
278 // Check for case (c)
279 if (RecordDynamicDumpInfo) {
280 vm_exit_during_initialization("-XX:+RecordDynamicDumpInfo is unsupported when a dynamic CDS archive is specified in -XX:SharedArchiveFile",
281 SharedArchiveFile);
282 }
283 if (ArchiveClassesAtExit != nullptr) {
284 vm_exit_during_initialization("-XX:ArchiveClassesAtExit is unsupported when a dynamic CDS archive is specified in -XX:SharedArchiveFile",
285 SharedArchiveFile);
286 }
287 }
288
289 if (ArchiveClassesAtExit != nullptr && os::same_files(SharedArchiveFile, ArchiveClassesAtExit)) {
290 vm_exit_during_initialization(
291 "Cannot have the same archive file specified for -XX:SharedArchiveFile and -XX:ArchiveClassesAtExit",
292 SharedArchiveFile);
293 }
294 }
295 }
296 }
297
298 static char* bad_module_prop_key = nullptr;
299 static char* bad_module_prop_value = nullptr;
300
301 void CDSConfig::check_internal_module_property(const char* key, const char* value) {
302 if (Arguments::is_incompatible_cds_internal_module_property(key)) {
303 stop_using_optimized_module_handling();
304 if (bad_module_prop_key == nullptr) {
305 // We don't want to print an unconditional warning here, as we are still processing the command line.
306 // A later argument may specify something like -Xshare:off, which makes such a warning irrelevant.
307 //
308 // Instead, we save the info so we can warn when necessary: we are doing it only during CacheDataStore
309 // creation for now, but could add it to other places.
310 bad_module_prop_key = os::strdup(key);
311 bad_module_prop_value = os::strdup(value);
312 }
313 log_info(cds)("optimized module handling/full module graph: disabled due to incompatible property: %s=%s", key, value);
314 }
315 }
316
317 void CDSConfig::check_incompatible_property(const char* key, const char* value) {
318 static const char* incompatible_properties[] = {
319 "java.system.class.loader",
320 "jdk.module.showModuleResolution",
321 "jdk.module.validation"
322 };
323
324 for (const char* property : incompatible_properties) {
325 if (strcmp(key, property) == 0) {
326 stop_dumping_full_module_graph();
327 stop_using_full_module_graph();
328 log_info(cds)("full module graph: disabled due to incompatible property: %s=%s", key, value);
329 break;
330 }
331 }
332
333 // Match the logic in java/lang/System.java, but we need to know this before the System class is initialized.
334 if (strcmp(key, "java.security.manager") == 0) {
335 if (strcmp(value, "disallowed") != 0) {
336 _is_security_manager_allowed = true;
337 }
338 }
339 }
340
341 // Returns any JVM command-line option, such as "--patch-module", that's not supported by CDS.
342 static const char* find_any_unsupported_module_option() {
343 // Note that arguments.cpp has translated the command-line options into properties. If we find an
344 // unsupported property, translate it back to its command-line option for better error reporting.
345
346 // The following properties are checked by Arguments::is_internal_module_property() and cannot be
347 // directly specified in the command-line.
348 static const char* unsupported_module_properties[] = {
349 "jdk.module.limitmods",
350 "jdk.module.upgrade.path",
351 "jdk.module.patch.0"
352 };
353 static const char* unsupported_module_options[] = {
354 "--limit-modules",
355 "--upgrade-module-path",
356 "--patch-module"
357 };
358
359 assert(ARRAY_SIZE(unsupported_module_properties) == ARRAY_SIZE(unsupported_module_options), "must be");
360 SystemProperty* sp = Arguments::system_properties();
361 while (sp != nullptr) {
362 for (uint i = 0; i < ARRAY_SIZE(unsupported_module_properties); i++) {
363 if (strcmp(sp->key(), unsupported_module_properties[i]) == 0) {
364 return unsupported_module_options[i];
365 }
366 }
367 sp = sp->next();
368 }
369
370 return nullptr; // not found
371 }
372
373 void CDSConfig::check_unsupported_dumping_module_options() {
374 assert(is_dumping_archive(), "this function is only used with CDS dump time");
375 const char* option = find_any_unsupported_module_option();
376 if (option != nullptr) {
377 vm_exit_during_initialization("Cannot use the following option when dumping the shared archive", option);
378 }
379 // Check for an exploded module build in use with -Xshare:dump.
380 if (!Arguments::has_jimage()) {
381 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build");
382 }
383 }
384
385 bool CDSConfig::has_unsupported_runtime_module_options() {
386 assert(is_using_archive(), "this function is only used with -Xshare:{on,auto}");
387 if (ArchiveClassesAtExit != nullptr) {
388 // dynamic dumping, just return false for now.
389 // check_unsupported_dumping_properties() will be called later to check the same set of
390 // properties, and will exit the VM with the correct error message if the unsupported properties
391 // are used.
392 return false;
393 }
394 const char* option = find_any_unsupported_module_option();
395 if (option != nullptr) {
396 if (RequireSharedSpaces) {
397 warning("CDS is disabled when the %s option is specified.", option);
398 } else {
399 if (new_aot_flags_used()) {
400 log_warning(cds)("AOT cache is disabled when the %s option is specified.", option);
401 } else {
402 log_info(cds)("CDS is disabled when the %s option is specified.", option);
403 }
404 }
405 return true;
406 }
407 return false;
408 }
409
410 #define CHECK_NEW_FLAG(f) check_new_flag(FLAG_IS_DEFAULT(f), #f)
411
412 void CDSConfig::check_new_flag(bool new_flag_is_default, const char* new_flag_name) {
413 if (old_cds_flags_used() && !new_flag_is_default) {
414 vm_exit_during_initialization(err_msg("Option %s cannot be used at the same time with "
415 "-Xshare:on, -Xshare:auto, -Xshare:off, -Xshare:dump, "
416 "DumpLoadedClassList, SharedClassListFile, or SharedArchiveFile",
417 new_flag_name));
418 }
419 if (experimental_leyden_flags_used() && !new_flag_is_default) {
420 vm_exit_during_initialization(err_msg("Option %s cannot be used at the same time with "
421 "CacheDataStore, CDSManualFinalImage, or CDSPreimage",
422 new_flag_name));
423 }
424 }
425
426 #define CHECK_SINGLE_PATH(f) check_flag_single_path(#f, f)
427
428 void CDSConfig::check_flag_single_path(const char* flag_name, const char* value) {
429 if (value != nullptr && num_archive_paths(value) != 1) {
430 vm_exit_during_initialization(err_msg("Option %s must specify a single file name", flag_name));
431 }
432 }
433
434 void CDSConfig::check_aot_flags() {
435 if (!FLAG_IS_DEFAULT(DumpLoadedClassList) ||
436 !FLAG_IS_DEFAULT(SharedClassListFile) ||
437 !FLAG_IS_DEFAULT(SharedArchiveFile)) {
438 _old_cds_flags_used = true;
439 }
440 if (!FLAG_IS_DEFAULT(CacheDataStore) ||
441 !FLAG_IS_DEFAULT(CDSManualFinalImage) ||
442 !FLAG_IS_DEFAULT(CDSPreimage)) {
443 _experimental_leyden_flags_used = true;
444 }
445
446 // "New" AOT flags must not be mixed with "classic" CDS flags such as -Xshare:dump
447 CHECK_NEW_FLAG(AOTCache);
448 CHECK_NEW_FLAG(AOTCacheOutput);
449 CHECK_NEW_FLAG(AOTConfiguration);
450 CHECK_NEW_FLAG(AOTMode);
451
452 CHECK_SINGLE_PATH(AOTCache);
453 CHECK_SINGLE_PATH(AOTCacheOutput);
454 CHECK_SINGLE_PATH(AOTConfiguration);
455
456 if (FLAG_IS_DEFAULT(AOTCache) &&
457 FLAG_IS_DEFAULT(AOTMode)) {
458 bool has_cache_output = !FLAG_IS_DEFAULT(AOTCacheOutput);
459 bool has_config = !FLAG_IS_DEFAULT(AOTConfiguration);
460 if (!has_cache_output && !has_config) {
461 // AOT flags are not used. Use classic CDS workflow
462 return;
463 } else if (has_cache_output) {
464 // If AOTCacheOutput has been set, default mode is "record".
465 // Default value for AOTConfiguration, if necessary, will be assigned in check_aotmode_record().
466 FLAG_SET_ERGO(AOTMode, "record");
467 }
468 }
469
470 // At least one AOT flag has been used
471 _new_aot_flags_used = true;
472
473 if (FLAG_IS_DEFAULT(AOTMode) || strcmp(AOTMode, "auto") == 0 || strcmp(AOTMode, "on") == 0) {
474 check_aotmode_auto_or_on();
475 } else if (strcmp(AOTMode, "off") == 0) {
476 check_aotmode_off();
477 } else if (strcmp(AOTMode, "record") == 0) {
478 check_aotmode_record();
479 } else {
480 assert(strcmp(AOTMode, "create") == 0, "checked by AOTModeConstraintFunc");
481 check_aotmode_create();
482 }
483 }
484
485 void CDSConfig::check_aotmode_off() {
486 UseSharedSpaces = false;
487 RequireSharedSpaces = false;
488 }
489
490 void CDSConfig::check_aotmode_auto_or_on() {
491 if (!FLAG_IS_DEFAULT(AOTConfiguration)) {
492 vm_exit_during_initialization("AOTConfiguration can only be used with -XX:AOTMode=record or -XX:AOTMode=create");
493 }
494
495 UseSharedSpaces = true;
496 if (FLAG_IS_DEFAULT(AOTMode) || (strcmp(AOTMode, "auto") == 0)) {
497 RequireSharedSpaces = false;
498 } else {
499 assert(strcmp(AOTMode, "on") == 0, "already checked");
500 RequireSharedSpaces = true;
501 }
502 }
503
504 void CDSConfig::check_aotmode_record() {
505 bool has_config = !FLAG_IS_DEFAULT(AOTConfiguration);
506 bool has_output = !FLAG_IS_DEFAULT(AOTCacheOutput);
507
508 if (has_output) {
509 _is_one_step_training = true;
510 if (!has_config) {
511 // Too early; can't use resource allocation yet.
512 size_t len = strlen(AOTCacheOutput) + 10;
513 char* temp = AllocateHeap(len, mtArguments);
514 jio_snprintf(temp, len, "%s.config", AOTCacheOutput);
515 FLAG_SET_ERGO(AOTConfiguration, temp);
516 FreeHeap(temp);
517 _has_temp_aot_config_file = true;
518 }
519 } else {
520 if (!has_config) {
521 vm_exit_during_initialization("-XX:AOTMode=record cannot be used without setting AOTCacheOutput or AOTConfiguration");
522 }
523 }
524
525 if (!FLAG_IS_DEFAULT(AOTCache)) {
526 vm_exit_during_initialization("AOTCache must not be specified when using -XX:AOTMode=record");
527 }
528
529 UseSharedSpaces = false;
530 RequireSharedSpaces = false;
531 _is_dumping_static_archive = true;
532 _is_dumping_preimage_static_archive = true;
533
534 // At VM exit, the module graph may be contaminated with program states.
535 // We will rebuild the module graph when dumping the CDS final image.
536 disable_heap_dumping();
537 }
538
539 void CDSConfig::check_aotmode_create() {
540 if (FLAG_IS_DEFAULT(AOTConfiguration)) {
541 vm_exit_during_initialization("-XX:AOTMode=create cannot be used without setting AOTConfiguration");
542 }
543
544 bool has_cache = !FLAG_IS_DEFAULT(AOTCache);
545 bool has_cache_output = !FLAG_IS_DEFAULT(AOTCacheOutput);
546
547 if (!has_cache && !has_cache_output) {
548 vm_exit_during_initialization("AOTCache or AOTCacheOutput must be specified when using -XX:AOTMode=create");
549 } else if (has_cache && has_cache_output && strcmp(AOTCache, AOTCacheOutput) != 0) {
550 vm_exit_during_initialization("AOTCache and AOTCacheOutput have different values");
551 }
552
553 if (!has_cache) {
554 precond(has_cache_output);
555 FLAG_SET_ERGO(AOTCache, AOTCacheOutput);
556 }
557
558 _is_dumping_final_static_archive = true;
559 UseSharedSpaces = true;
560 RequireSharedSpaces = true;
561
562 if (!FileMapInfo::is_preimage_static_archive(AOTConfiguration)) {
563 vm_exit_during_initialization("Must be a valid AOT configuration generated by the current JVM", AOTConfiguration);
564 }
565
566 CDSConfig::enable_dumping_static_archive();
567 }
568
569 void CDSConfig::ergo_init_aot_paths() {
570 assert(_cds_ergo_initialize_started, "sanity");
571 if (is_dumping_static_archive()) {
572 if (is_dumping_preimage_static_archive()) {
573 _output_archive_path = AOTConfiguration;
574 } else {
575 assert(is_dumping_final_static_archive(), "must be");
576 _input_static_archive_path = AOTConfiguration;
577 _output_archive_path = AOTCache;
578 }
579 } else if (is_using_archive()) {
580 if (FLAG_IS_DEFAULT(AOTCache)) {
581 // Only -XX:AOTMode={auto,on} is specified
582 _input_static_archive_path = default_archive_path();
583 } else {
584 _input_static_archive_path = AOTCache;
585 }
586 }
587 }
588
589 void CDSConfig::ergo_init_experimental_leyden_paths() {
590 assert(_cds_ergo_initialize_started, "sanity");
591 if (is_dumping_static_archive()) {
592 if (is_dumping_preimage_static_archive()) {
593 _output_archive_path = CDSPreimage;
594 } else {
595 assert(is_dumping_final_static_archive(), "must be");
596 _input_static_archive_path = CDSPreimage;
597 _output_archive_path = CacheDataStore;
598 }
599 } else if (is_using_archive()) {
600 _input_static_archive_path = CacheDataStore;
601 }
602 }
603
604 bool CDSConfig::check_vm_args_consistency(bool patch_mod_javabase, bool mode_flag_cmd_line, bool xshare_auto_cmd_line) {
605 assert(!_cds_ergo_initialize_started, "This is called earlier than CDSConfig::ergo_initialize()");
606
607 check_aot_flags();
608
609 if (!FLAG_IS_DEFAULT(AOTMode)) {
610 // Using any form of the new AOTMode switch enables enhanced optimizations.
611 FLAG_SET_ERGO_IF_DEFAULT(AOTClassLinking, true);
612 }
613
614 if (CacheDataStore != nullptr) {
615 if (!setup_experimental_leyden_workflow(xshare_auto_cmd_line)) {
616 return false;
617 }
618 } else {
619 if (CDSPreimage != nullptr) {
620 vm_exit_during_initialization("CDSPreimage must be specified only when CacheDataStore is specified");
621 }
622
623 setup_compiler_args();
624 }
625
626 if (AOTClassLinking) {
627 // If AOTClassLinking is specified, enable all these optimizations by default.
628 FLAG_SET_ERGO_IF_DEFAULT(AOTInvokeDynamicLinking, true);
629 FLAG_SET_ERGO_IF_DEFAULT(ArchiveDynamicProxies, true);
630 FLAG_SET_ERGO_IF_DEFAULT(ArchiveLoaderLookupCache, true);
631 FLAG_SET_ERGO_IF_DEFAULT(ArchivePackages, true);
632 FLAG_SET_ERGO_IF_DEFAULT(ArchiveProtectionDomains, true);
633 FLAG_SET_ERGO_IF_DEFAULT(ArchiveReflectionData, true);
634 } else {
635 // All of these *might* depend on AOTClassLinking. Better be safe than sorry.
636 FLAG_SET_ERGO(AOTInvokeDynamicLinking, false);
637 FLAG_SET_ERGO(ArchiveDynamicProxies, false);
638 FLAG_SET_ERGO(ArchiveLoaderLookupCache, false);
639 FLAG_SET_ERGO(ArchivePackages, false);
640 FLAG_SET_ERGO(ArchiveProtectionDomains, false);
641 FLAG_SET_ERGO(ArchiveReflectionData, false);
642
643 if (CDSConfig::is_dumping_archive()) {
644 FLAG_SET_ERGO(AOTRecordTraining, false);
645 FLAG_SET_ERGO(AOTReplayTraining, false);
646 AOTCodeCache::disable_caching();
647 }
648 }
649
650 #ifdef _WINDOWS
651 // This optimization is not working on Windows for some reason. See JDK-8338604.
652 FLAG_SET_ERGO(ArchiveReflectionData, false);
653 #endif
654
655 if (is_dumping_static_archive()) {
656 if (is_dumping_preimage_static_archive() || is_dumping_final_static_archive()) {
657 // Don't tweak execution mode
658 } else if (!mode_flag_cmd_line) {
659 // By default, -Xshare:dump runs in interpreter-only mode, which is required for deterministic archive.
660 //
661 // If your classlist is large and you don't care about deterministic dumping, you can use
662 // -Xshare:dump -Xmixed to improve dumping speed.
663 Arguments::set_mode_flags(Arguments::_int);
664 } else if (Arguments::mode() == Arguments::_comp) {
665 // -Xcomp may use excessive CPU for the test tiers. Also, -Xshare:dump runs a small and fixed set of
666 // Java code, so there's not much benefit in running -Xcomp.
667 log_info(cds)("reduced -Xcomp to -Xmixed for static dumping");
668 Arguments::set_mode_flags(Arguments::_mixed);
669 }
670
671 // String deduplication may cause CDS to iterate the strings in different order from one
672 // run to another which resulting in non-determinstic CDS archives.
673 // Disable UseStringDeduplication while dumping CDS archive.
674 UseStringDeduplication = false;
675 }
676
677 // RecordDynamicDumpInfo is not compatible with ArchiveClassesAtExit
678 if (ArchiveClassesAtExit != nullptr && RecordDynamicDumpInfo) {
679 jio_fprintf(defaultStream::output_stream(),
680 "-XX:+RecordDynamicDumpInfo cannot be used with -XX:ArchiveClassesAtExit.\n");
681 return false;
682 }
683
684 if (ArchiveClassesAtExit == nullptr && !RecordDynamicDumpInfo) {
685 disable_dumping_dynamic_archive();
686 } else {
687 enable_dumping_dynamic_archive(ArchiveClassesAtExit);
688 }
689
690 if (AutoCreateSharedArchive) {
691 if (SharedArchiveFile == nullptr) {
692 log_warning(cds)("-XX:+AutoCreateSharedArchive requires -XX:SharedArchiveFile");
693 return false;
694 }
695 if (ArchiveClassesAtExit != nullptr) {
696 log_warning(cds)("-XX:+AutoCreateSharedArchive does not work with ArchiveClassesAtExit");
697 return false;
698 }
699 }
700
701 if (is_using_archive() && patch_mod_javabase) {
702 Arguments::no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched.");
703 }
704 if (is_using_archive() && has_unsupported_runtime_module_options()) {
705 UseSharedSpaces = false;
706 }
707
708 if (is_dumping_archive()) {
709 // Always verify non-system classes during CDS dump
710 if (!BytecodeVerificationRemote) {
711 BytecodeVerificationRemote = true;
712 log_info(cds)("All non-system classes will be verified (-Xverify:remote) during CDS dump time.");
713 }
714 }
715
716 if (AOTClassLinking) {
717 if (is_dumping_final_static_archive() && !is_dumping_full_module_graph()) {
718 if (bad_module_prop_key != nullptr) {
719 log_warning(cds)("optimized module handling/full module graph: disabled due to incompatible property: %s=%s",
720 bad_module_prop_key, bad_module_prop_value);
721 }
722 if (is_experimental_leyden_workflow()) {
723 vm_exit_during_initialization("CacheDataStore cannot be created because AOTClassLinking is enabled but full module graph is disabled");
724 } else {
725 vm_exit_during_initialization("AOT cache cannot be created because AOTClassLinking is enabled but full module graph is disabled");
726 }
727 }
728 }
729
730 return true;
731 }
732
733 void CDSConfig::setup_compiler_args() {
734 // AOT profiles and AOT-compiled methods are supported only in the JEP 483 workflow.
735 bool can_dump_profile_and_compiled_code = AOTClassLinking && new_aot_flags_used();
736
737 if (is_dumping_preimage_static_archive() && can_dump_profile_and_compiled_code) {
738 // JEP 483 workflow -- training
739 FLAG_SET_ERGO_IF_DEFAULT(AOTRecordTraining, true);
740 FLAG_SET_ERGO(AOTReplayTraining, false);
741 AOTCodeCache::disable_caching();
742 } else if (is_dumping_final_static_archive() && can_dump_profile_and_compiled_code) {
743 // JEP 483 workflow -- assembly
744 FLAG_SET_ERGO(AOTRecordTraining, false);
745 FLAG_SET_ERGO_IF_DEFAULT(AOTReplayTraining, true);
746 AOTCodeCache::enable_caching();
747 disable_dumping_aot_code(); // Cannot dump aot code until metadata and heap are dumped.
748 } else if (is_using_archive() && new_aot_flags_used()) {
749 // JEP 483 workflow -- production
750 FLAG_SET_ERGO(AOTRecordTraining, false);
751 FLAG_SET_ERGO_IF_DEFAULT(AOTReplayTraining, true);
752 AOTCodeCache::enable_caching();
753
754 if (UseSharedSpaces && FLAG_IS_DEFAULT(AOTMode)) {
755 log_info(cds)("Enabled -XX:AOTMode=on by default for troubleshooting Leyden prototype");
756 RequireSharedSpaces = true;
757 }
758 } else {
759 FLAG_SET_ERGO(AOTReplayTraining, false);
760 FLAG_SET_ERGO(AOTRecordTraining, false);
761 AOTCodeCache::disable_caching();
762 }
763 }
764
765 // Ergo set-up of various flags used by the experimental workflow that uses -XX:CacheDataStore. This workflow
766 // is deprecated and will be removed from Leyden.
767 bool CDSConfig::setup_experimental_leyden_workflow(bool xshare_auto_cmd_line) {
768 // Leyden temp work-around:
769 //
770 // By default, when using CacheDataStore, use the HeapBasedNarrowOop mode so that
771 // AOT code can be always work regardless of runtime heap range.
772 //
773 // If you are *absolutely sure* that the CompressedOops::mode() will be the same
774 // between training and production runs (e.g., if you specify -Xmx128m
775 // for both training and production runs, and you know the OS will always reserve
776 // the heap under 4GB), you can explicitly disable this with:
777 // java -XX:-UseCompatibleCompressedOops -XX:CacheDataStore=...
778 // However, this is risky and there's a chance that the production run will be slower
779 // because it is unable to load the AOT code cache.
780 #ifdef _LP64
781 // FLAG_SET_ERGO_IF_DEFAULT(UseCompatibleCompressedOops, true); // FIXME @iklam - merge with mainline - UseCompatibleCompressedOops
782 #endif
783
784 if (FLAG_IS_DEFAULT(AOTClassLinking)) {
785 FLAG_SET_ERGO(AOTClassLinking, true);
786 }
787
788 if (SharedArchiveFile != nullptr) {
789 vm_exit_during_initialization("CacheDataStore and SharedArchiveFile cannot be both specified");
790 }
791 if (!AOTClassLinking) {
792 vm_exit_during_initialization("CacheDataStore requires AOTClassLinking");
793 }
794
795 if (CDSPreimage == nullptr) {
796 if (os::file_exists(CacheDataStore) /* && TODO: Need to check if CDS file is valid*/) {
797 // The CacheDataStore is already up to date. Use it. Also turn on aot code by default.
798 FLAG_SET_ERGO_IF_DEFAULT(AOTReplayTraining, true);
799 AOTCodeCache::enable_caching();
800
801 // Leyden temp: make sure the user knows if CDS archive somehow fails to load.
802 if (UseSharedSpaces && !xshare_auto_cmd_line) {
803 log_info(cds)("Enabled -Xshare:on by default for troubleshooting Leyden prototype");
804 RequireSharedSpaces = true;
805 }
806 } else {
807 // The preimage dumping phase -- run the app and write the preimage file
808 size_t len = strlen(CacheDataStore) + 10;
809 char* preimage = AllocateHeap(len, mtArguments);
810 jio_snprintf(preimage, len, "%s.preimage", CacheDataStore);
811
812 UseSharedSpaces = false;
813 enable_dumping_static_archive();
814 CDSPreimage = preimage;
815 log_info(cds)("CacheDataStore needs to be updated. Writing %s file", CDSPreimage);
816
817 // At VM exit, the module graph may be contaminated with program states. We should rebuild the
818 // module graph when dumping the CDS final image.
819 log_info(cds)("full module graph: disabled when writing CDS preimage");
820 disable_heap_dumping();
821 stop_dumping_full_module_graph();
822 FLAG_SET_ERGO(ArchivePackages, false);
823 FLAG_SET_ERGO(ArchiveProtectionDomains, false);
824 FLAG_SET_ERGO_IF_DEFAULT(AOTRecordTraining, true);
825 _is_dumping_static_archive = true;
826 _is_dumping_preimage_static_archive = true;
827 }
828 } else {
829 // The final image dumping phase -- load the preimage and write the final image file
830 UseSharedSpaces = true;
831 log_info(cds)("Generate CacheDataStore %s from CDSPreimage %s", CacheDataStore, CDSPreimage);
832 // Force -Xbatch for AOT compilation.
833 if (FLAG_SET_CMDLINE(BackgroundCompilation, false) != JVMFlag::SUCCESS) {
834 return false;
835 }
836 AOTRecordTraining = false; // This will be updated inside MetaspaceShared::preload_and_dump()
837
838 FLAG_SET_ERGO_IF_DEFAULT(AOTReplayTraining, true);
839 // Settings for AOT
840 AOTCodeCache::enable_caching(); // Update default settings
841 if (AOTCodeCache::is_caching_enabled()) {
842 // Cannot dump aot code until metadata and heap are dumped.
843 disable_dumping_aot_code();
844 }
845 _is_dumping_static_archive = true;
846 _is_dumping_final_static_archive = true;
847 }
848
849 return true;
850 }
851
852 void CDSConfig::prepare_for_dumping() {
853 assert(CDSConfig::is_dumping_archive(), "sanity");
854
855 if (is_dumping_dynamic_archive() && !is_using_archive()) {
856 assert(!is_dumping_static_archive(), "cannot be dumping both static and dynamic archives");
857
858 // This could happen if SharedArchiveFile has failed to load:
859 // - -Xshare:off was specified
860 // - SharedArchiveFile points to an non-existent file.
861 // - SharedArchiveFile points to an archive that has failed CRC check
862 // - SharedArchiveFile is not specified and the VM doesn't have a compatible default archive
863
864 #define __THEMSG " is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info."
865 if (RecordDynamicDumpInfo) {
866 log_error(cds)("-XX:+RecordDynamicDumpInfo%s", __THEMSG);
867 MetaspaceShared::unrecoverable_loading_error();
868 } else {
869 assert(ArchiveClassesAtExit != nullptr, "sanity");
870 log_warning(cds)("-XX:ArchiveClassesAtExit" __THEMSG);
871 }
872 #undef __THEMSG
873 disable_dumping_dynamic_archive();
874 return;
875 }
876
877 check_unsupported_dumping_module_options();
878 }
879
880 bool CDSConfig::is_dumping_classic_static_archive() {
881 return _is_dumping_static_archive &&
882 !is_dumping_preimage_static_archive() &&
883 !is_dumping_final_static_archive();
884 }
885
886 bool CDSConfig::is_dumping_preimage_static_archive() {
887 return _is_dumping_preimage_static_archive;
888 }
889
890 bool CDSConfig::is_dumping_preimage_static_archive_with_triggers() {
891 return (!FLAG_IS_DEFAULT(AOTEndTrainingOnMethodEntry)) && is_dumping_preimage_static_archive();
892 }
893
894 bool CDSConfig::is_dumping_final_static_archive() {
895 return _is_dumping_final_static_archive;
896 }
897
898 void CDSConfig::enable_dumping_dynamic_archive(const char* output_path) {
899 _is_dumping_dynamic_archive = true;
900 if (output_path == nullptr) {
901 // output_path can be null when the VM is started with -XX:+RecordDynamicDumpInfo
902 // in anticipation of "jcmd VM.cds dynamic_dump", which will provide the actual
903 // output path.
904 _output_archive_path = nullptr;
905 } else {
906 _output_archive_path = os::strdup_check_oom(output_path, mtArguments);
907 }
908 }
909
910 bool CDSConfig::allow_only_single_java_thread() {
911 // See comments in JVM_StartThread()
912 return is_dumping_classic_static_archive() || is_dumping_final_static_archive();
913 }
914
915 bool CDSConfig::is_logging_dynamic_proxies() {
916 return ClassListWriter::is_enabled() || is_dumping_preimage_static_archive();
917 }
918
919 // Preserve all states that were examined used during dumptime verification, such
920 // that the verification result (pass or fail) cannot be changed at runtime.
921 //
922 // For example, if the verification of ik requires that class A must be a subtype of B,
923 // then this relationship between A and B cannot be changed at runtime. I.e., the app
924 // cannot load alternative versions of A and B such that A is not a subtype of B.
925 bool CDSConfig::preserve_all_dumptime_verification_states(const InstanceKlass* ik) {
926 return is_dumping_aot_linked_classes() && SystemDictionaryShared::is_builtin(ik);
927 }
928
929 bool CDSConfig::is_using_archive() {
930 return UseSharedSpaces;
931 }
932
933 bool CDSConfig::is_logging_lambda_form_invokers() {
934 return ClassListWriter::is_enabled() || is_dumping_dynamic_archive() || is_dumping_preimage_static_archive();
935 }
936
937 bool CDSConfig::is_dumping_regenerated_lambdaform_invokers() {
938 if (is_dumping_final_static_archive()) {
939 // No need to regenerate -- the lambda form invokers should have been regenerated
940 // in the preimage archive (if allowed)
941 return false;
942 } else if (is_dumping_dynamic_archive() && is_using_aot_linked_classes()) {
943 // The base archive has aot-linked classes that may have AOT-resolved CP references
944 // that point to the lambda form invokers in the base archive. Such pointers will
945 // be invalid if lambda form invokers are regenerated in the dynamic archive.
946 return false;
947 } else if (CDSConfig::is_dumping_method_handles()) {
948 // Work around JDK-8310831, as some methods in lambda form holder classes may not get generated.
949 return false;
950 } else {
951 return is_dumping_archive();
952 }
953 }
954
955 void CDSConfig::stop_using_optimized_module_handling() {
956 _is_using_optimized_module_handling = false;
957 _is_dumping_full_module_graph = false; // This requires is_using_optimized_module_handling()
958 _is_using_full_module_graph = false; // This requires is_using_optimized_module_handling()
959 }
960
961
962 CDSConfig::DumperThreadMark::DumperThreadMark(JavaThread* current) {
963 assert(_dumper_thread == nullptr, "sanity");
964 _dumper_thread = current;
965 }
966
967 CDSConfig::DumperThreadMark::~DumperThreadMark() {
968 assert(_dumper_thread != nullptr, "sanity");
969 _dumper_thread = nullptr;
970 }
971
972 bool CDSConfig::current_thread_is_vm_or_dumper() {
973 Thread* t = Thread::current();
974 return t != nullptr && (t->is_VM_thread() || t == _dumper_thread);
975 }
976
977 const char* CDSConfig::type_of_archive_being_loaded() {
978 if (is_dumping_final_static_archive()) {
979 return "AOT configuration file";
980 } else if (new_aot_flags_used()) {
981 return "AOT cache";
982 } else {
983 return "shared archive file";
984 }
985 }
986
987 const char* CDSConfig::type_of_archive_being_written() {
988 if (is_dumping_preimage_static_archive()) {
989 return "AOT configuration file";
990 } else if (new_aot_flags_used()) {
991 return "AOT cache";
992 } else {
993 return "shared archive file";
994 }
995 }
996
997 // If an incompatible VM options is found, return a text message that explains why
998 static const char* check_options_incompatible_with_dumping_heap() {
999 #if INCLUDE_CDS_JAVA_HEAP
1000 if (!UseCompressedClassPointers) {
1001 return "UseCompressedClassPointers must be true";
1002 }
1003
1004 // Almost all GCs support heap region dump, except ZGC (so far).
1005 if (UseZGC) {
1006 return "ZGC is not supported";
1007 }
1008
1009 return nullptr;
1010 #else
1011 return "JVM not configured for writing Java heap objects";
1012 #endif
1013 }
1014
1015 void CDSConfig::log_reasons_for_not_dumping_heap() {
1016 const char* reason;
1017
1018 assert(!is_dumping_heap(), "sanity");
1019
1020 if (_disable_heap_dumping) {
1021 reason = "Programmatically disabled";
1022 } else {
1023 reason = check_options_incompatible_with_dumping_heap();
1024 }
1025
1026 assert(reason != nullptr, "sanity");
1027 log_info(cds)("Archived java heap is not supported: %s", reason);
1028 }
1029
1030 // This is *Legacy* optimization for lambdas before JEP 483. May be removed in the future.
1031 bool CDSConfig::is_dumping_lambdas_in_legacy_mode() {
1032 return !is_dumping_method_handles();
1033 }
1034
1035 #if INCLUDE_CDS_JAVA_HEAP
1036 bool CDSConfig::are_vm_options_incompatible_with_dumping_heap() {
1037 return check_options_incompatible_with_dumping_heap() != nullptr;
1038 }
1039
1040 bool CDSConfig::is_dumping_heap() {
1041 if (!(is_dumping_classic_static_archive() || is_dumping_final_static_archive())
1042 || are_vm_options_incompatible_with_dumping_heap()
1043 || _disable_heap_dumping) {
1044 return false;
1045 }
1046 return true;
1047 }
1048
1049 bool CDSConfig::is_loading_heap() {
1050 return ArchiveHeapLoader::is_in_use();
1051 }
1052
1053 bool CDSConfig::is_using_full_module_graph() {
1054 if (ClassLoaderDataShared::is_full_module_graph_loaded()) {
1055 return true;
1056 }
1057
1058 if (!_is_using_full_module_graph) {
1059 return false;
1060 }
1061
1062 if (is_using_archive() && ArchiveHeapLoader::can_use()) {
1063 // Classes used by the archived full module graph are loaded in JVMTI early phase.
1064 assert(!(JvmtiExport::should_post_class_file_load_hook() && JvmtiExport::has_early_class_hook_env()),
1065 "CDS should be disabled if early class hooks are enabled");
1066 return true;
1067 } else {
1068 _is_using_full_module_graph = false;
1069 return false;
1070 }
1071 }
1072
1073 void CDSConfig::stop_dumping_full_module_graph(const char* reason) {
1074 if (_is_dumping_full_module_graph) {
1075 _is_dumping_full_module_graph = false;
1076 if (reason != nullptr) {
1077 log_info(cds)("full module graph cannot be dumped: %s", reason);
1078 }
1079 }
1080 }
1081
1082 void CDSConfig::stop_using_full_module_graph(const char* reason) {
1083 assert(!ClassLoaderDataShared::is_full_module_graph_loaded(), "you call this function too late!");
1084 if (_is_using_full_module_graph) {
1085 _is_using_full_module_graph = false;
1086 if (reason != nullptr) {
1087 log_info(cds)("full module graph cannot be loaded: %s", reason);
1088 }
1089 }
1090 }
1091
1092 bool CDSConfig::is_dumping_aot_linked_classes() {
1093 if (is_dumping_preimage_static_archive()) {
1094 return false;
1095 } else if (is_dumping_dynamic_archive()) {
1096 return is_using_full_module_graph() && AOTClassLinking;
1097 } else if (is_dumping_static_archive()) {
1098 return is_dumping_full_module_graph() && AOTClassLinking;
1099 } else {
1100 return false;
1101 }
1102 }
1103
1104 bool CDSConfig::is_using_aot_linked_classes() {
1105 // Make sure we have the exact same module graph as in the assembly phase, or else
1106 // some aot-linked classes may not be visible so cannot be loaded.
1107 return is_using_full_module_graph() && _has_aot_linked_classes;
1108 }
1109
1110 bool CDSConfig::is_dumping_dynamic_proxies() {
1111 return is_dumping_full_module_graph() && is_dumping_invokedynamic() && ArchiveDynamicProxies;
1112 }
1113
1114 void CDSConfig::set_has_aot_linked_classes(bool has_aot_linked_classes) {
1115 _has_aot_linked_classes |= has_aot_linked_classes;
1116 }
1117
1118 bool CDSConfig::is_initing_classes_at_dump_time() {
1119 return is_dumping_heap() && is_dumping_aot_linked_classes();
1120 }
1121
1122 bool CDSConfig::is_dumping_invokedynamic() {
1123 // Requires is_dumping_aot_linked_classes(). Otherwise the classes of some archived heap
1124 // objects used by the archive indy callsites may be replaced at runtime.
1125 return AOTInvokeDynamicLinking && is_dumping_aot_linked_classes() && is_dumping_heap();
1126 }
1127
1128 bool CDSConfig::is_dumping_packages() {
1129 return ArchivePackages && is_dumping_heap();
1130 }
1131
1132 bool CDSConfig::is_loading_packages() {
1133 return UseSharedSpaces && is_using_full_module_graph() && _is_loading_packages;
1134 }
1135
1136 bool CDSConfig::is_dumping_protection_domains() {
1137 if (_is_security_manager_allowed) {
1138 // For sanity, don't archive PDs. TODO: can this be relaxed?
1139 return false;
1140 }
1141 // Archived PDs for the modules will reference their java.lang.Module, which must
1142 // also be archived.
1143 return ArchiveProtectionDomains && is_dumping_full_module_graph();
1144 }
1145
1146 bool CDSConfig::is_loading_protection_domains() {
1147 if (_is_security_manager_allowed) {
1148 // For sanity, don't used any archived PDs. TODO: can this be relaxed?
1149 return false;
1150 }
1151 return UseSharedSpaces && is_using_full_module_graph() && _is_loading_protection_domains;
1152 }
1153
1154 bool CDSConfig::is_dumping_reflection_data() {
1155 // reflection data use LambdaForm classes
1156 return ArchiveReflectionData && is_dumping_invokedynamic();
1157 }
1158
1159 // When we are dumping aot-linked classes and we are able to write archived heap objects, we automatically
1160 // enable the archiving of MethodHandles. This will in turn enable the archiving of MethodTypes and hidden
1161 // classes that are used in the implementation of MethodHandles.
1162 // Archived MethodHandles are required for higher-level optimizations such as AOT resolution of invokedynamic
1163 // and dynamic proxies.
1164 bool CDSConfig::is_dumping_method_handles() {
1165 return is_initing_classes_at_dump_time();
1166 }
1167
1168 #endif // INCLUDE_CDS_JAVA_HEAP
1169
1170 // AOT code generation and its archiving is disabled by default.
1171 // We enable it only in the final image dump after the metadata and heap are dumped.
1172 // This affects only JITed code because it may have embedded oops and metadata pointers
1173 // which AOT code encodes as offsets in final CDS archive regions.
1174
1175 static bool _is_dumping_aot_code = false;
1176
1177 bool CDSConfig::is_dumping_aot_code() {
1178 return _is_dumping_aot_code;
1179 }
1180
1181 void CDSConfig::disable_dumping_aot_code() {
1182 _is_dumping_aot_code = false;
1183 }
1184
1185 void CDSConfig::enable_dumping_aot_code() {
1186 _is_dumping_aot_code = true;
1187 }
1188
1189 bool CDSConfig::is_experimental_leyden_workflow() {
1190 return CacheDataStore != nullptr || CDSPreimage != nullptr;
1191 }