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 }