1 /*
2 * Copyright (c) 2014, 2016, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.internal.module;
27
28 import java.io.File;
29 import java.io.IOException;
30 import java.io.PrintStream;
31 import java.io.UncheckedIOException;
32 import java.lang.module.Configuration;
33 import java.lang.module.ModuleDescriptor;
34 import java.lang.module.ModuleFinder;
35 import java.lang.module.ModuleReference;
36 import java.lang.module.ResolvedModule;
37 import java.lang.reflect.Layer;
38 import java.lang.reflect.Module;
39 import java.net.URI;
40 import java.nio.file.Files;
41 import java.nio.file.Path;
42 import java.nio.file.Paths;
43 import java.util.ArrayList;
44 import java.util.Collections;
45 import java.util.HashMap;
46 import java.util.HashSet;
47 import java.util.List;
48 import java.util.Map;
49 import java.util.Optional;
50 import java.util.Set;
51 import java.util.function.Function;
52 import java.util.stream.Stream;
53
54 import jdk.internal.loader.BootLoader;
55 import jdk.internal.loader.BuiltinClassLoader;
56 import jdk.internal.misc.SharedSecrets;
57 import jdk.internal.perf.PerfCounter;
58
59 /**
60 * Initializes/boots the module system.
61 *
62 * The {@link #boot() boot} method is called early in the startup to initialize
63 * the module system. In summary, the boot method creates a Configuration by
64 * resolving a set of module names specified via the launcher (or equivalent)
65 * -m and --add-modules options. The modules are located on a module path that
66 * is constructed from the upgrade module path, system modules, and application
67 * module path. The Configuration is instantiated as the boot Layer with each
68 * module in the the configuration defined to one of the built-in class loaders.
69 */
70
71 public final class ModuleBootstrap {
72 private ModuleBootstrap() { }
73
74 private static final String JAVA_BASE = "java.base";
75
76 private static final String JAVA_SE = "java.se";
77
78 // the token for "all default modules"
79 private static final String ALL_DEFAULT = "ALL-DEFAULT";
80
81 // the token for "all unnamed modules"
82 private static final String ALL_UNNAMED = "ALL-UNNAMED";
83
84 // the token for "all system modules"
85 private static final String ALL_SYSTEM = "ALL-SYSTEM";
86
87 // the token for "all modules on the module path"
88 private static final String ALL_MODULE_PATH = "ALL-MODULE-PATH";
89
90 // The ModulePatcher for the initial configuration
91 private static final ModulePatcher patcher = initModulePatcher();
92
93 // ModuleFinder for the initial configuration
94 private static ModuleFinder initialFinder;
95
96 /**
97 * Returns the ModulePatcher for the initial configuration.
98 */
99 public static ModulePatcher patcher() {
100 return patcher;
101 }
102
103 /**
104 * Returns the ModuleFinder for the initial configuration
105 */
106 public static ModuleFinder finder() {
107 assert initialFinder != null;
108 return initialFinder;
109 }
110
111 /**
112 * Initialize the module system, returning the boot Layer.
113 *
114 * @see java.lang.System#initPhase2()
115 */
116 public static Layer boot() {
117
118 long t0 = System.nanoTime();
119
120 // system modules (may be patched)
121 ModuleFinder systemModules;
122 if (SystemModules.MODULE_NAMES.length > 0) {
123 systemModules = SystemModuleFinder.getInstance();
124 } else {
125 systemModules = ModuleFinder.ofSystem();
126 }
127
128 PerfCounters.systemModulesTime.addElapsedTimeFrom(t0);
129
130
131 long t1 = System.nanoTime();
132
133 // Once we have the system modules then we define the base module to
134 // the VM. We do this here so that java.base is defined as early as
135 // possible and also that resources in the base module can be located
136 // for error messages that may happen from here on.
137 ModuleReference base = systemModules.find(JAVA_BASE).orElse(null);
138 if (base == null)
139 throw new InternalError(JAVA_BASE + " not found");
140 URI baseUri = base.location().orElse(null);
141 if (baseUri == null)
142 throw new InternalError(JAVA_BASE + " does not have a location");
143 BootLoader.loadModule(base);
144 Modules.defineModule(null, base.descriptor(), baseUri);
145
146 PerfCounters.defineBaseTime.addElapsedTimeFrom(t1);
147
148
149 long t2 = System.nanoTime();
150
151 // --upgrade-module-path option specified to launcher
152 ModuleFinder upgradeModulePath
153 = createModulePathFinder("jdk.module.upgrade.path");
154 if (upgradeModulePath != null)
155 systemModules = ModuleFinder.compose(upgradeModulePath, systemModules);
156
157 // --module-path option specified to the launcher
158 ModuleFinder appModulePath = createModulePathFinder("jdk.module.path");
159
160 // The module finder: [--upgrade-module-path] system [--module-path]
161 ModuleFinder finder = systemModules;
162 if (appModulePath != null)
163 finder = ModuleFinder.compose(finder, appModulePath);
164
165 // The root modules to resolve
166 Set<String> roots = new HashSet<>();
167
168 // launcher -m option to specify the main/initial module
169 String mainModule = System.getProperty("jdk.module.main");
170 if (mainModule != null)
171 roots.add(mainModule);
172
173 // additional module(s) specified by --add-modules
174 boolean addAllDefaultModules = false;
175 boolean addAllSystemModules = false;
176 boolean addAllApplicationModules = false;
177 for (String mod: getExtraAddModules()) {
178 switch (mod) {
179 case ALL_DEFAULT:
180 addAllDefaultModules = true;
181 break;
182 case ALL_SYSTEM:
183 addAllSystemModules = true;
184 break;
185 case ALL_MODULE_PATH:
186 addAllApplicationModules = true;
187 break;
188 default :
189 roots.add(mod);
190 }
191 }
192
193 // --limit-modules
194 String propValue = getAndRemoveProperty("jdk.module.limitmods");
195 if (propValue != null) {
196 Set<String> mods = new HashSet<>();
197 for (String mod: propValue.split(",")) {
198 mods.add(mod);
199 }
200 finder = limitFinder(finder, mods, roots);
201 }
202
203 // If there is no initial module specified then assume that the initial
204 // module is the unnamed module of the application class loader. This
205 // is implemented by resolving "java.se" and all (non-java.*) modules
206 // that export an API. If "java.se" is not observable then all java.*
207 // modules are resolved. Modules that have the DO_NOT_RESOLVE_BY_DEFAULT
208 // bit set in their ModuleResolution attribute flags are excluded from
209 // the default set of roots.
210 if (mainModule == null || addAllDefaultModules) {
211 boolean hasJava = false;
212 if (systemModules.find(JAVA_SE).isPresent()) {
213 // java.se is a system module
214 if (finder == systemModules || finder.find(JAVA_SE).isPresent()) {
215 // java.se is observable
216 hasJava = true;
217 roots.add(JAVA_SE);
218 }
219 }
220
221 for (ModuleReference mref : systemModules.findAll()) {
222 String mn = mref.descriptor().name();
223 if (hasJava && mn.startsWith("java."))
224 continue;
225
226 if (ModuleResolution.doNotResolveByDefault(mref))
227 continue;
228
229 // add as root if observable and exports at least one package
230 if ((finder == systemModules || finder.find(mn).isPresent())) {
231 ModuleDescriptor descriptor = mref.descriptor();
232 for (ModuleDescriptor.Exports e : descriptor.exports()) {
233 if (!e.isQualified()) {
234 roots.add(mn);
235 break;
236 }
237 }
238 }
239 }
240 }
241
242 // If `--add-modules ALL-SYSTEM` is specified then all observable system
243 // modules will be resolved.
244 if (addAllSystemModules) {
245 ModuleFinder f = finder; // observable modules
246 systemModules.findAll()
247 .stream()
248 .filter(mref -> !ModuleResolution.doNotResolveByDefault(mref))
249 .map(ModuleReference::descriptor)
250 .map(ModuleDescriptor::name)
251 .filter(mn -> f.find(mn).isPresent()) // observable
252 .forEach(mn -> roots.add(mn));
253 }
254
255 // If `--add-modules ALL-MODULE-PATH` is specified then all observable
256 // modules on the application module path will be resolved.
257 if (appModulePath != null && addAllApplicationModules) {
258 ModuleFinder f = finder; // observable modules
259 appModulePath.findAll()
260 .stream()
261 .map(ModuleReference::descriptor)
262 .map(ModuleDescriptor::name)
263 .filter(mn -> f.find(mn).isPresent()) // observable
264 .forEach(mn -> roots.add(mn));
265 }
266
267 PerfCounters.optionsAndRootsTime.addElapsedTimeFrom(t2);
268
269
270 long t3 = System.nanoTime();
271
272 // determine if post resolution checks are needed
273 boolean needPostResolutionChecks = true;
274 if (baseUri.getScheme().equals("jrt") // toLowerCase not needed here
275 && (upgradeModulePath == null)
276 && (appModulePath == null)
277 && (patcher.isEmpty())) {
278 needPostResolutionChecks = false;
279 }
280
281 PrintStream traceOutput = null;
282 if (Boolean.getBoolean("jdk.launcher.traceResolver"))
283 traceOutput = System.out;
284
285 // run the resolver to create the configuration
286 Configuration cf = SharedSecrets.getJavaLangModuleAccess()
287 .resolveAndBind(finder,
288 roots,
289 needPostResolutionChecks,
290 traceOutput);
291
292 // time to create configuration
293 PerfCounters.resolveTime.addElapsedTimeFrom(t3);
294
295 // check module names and incubating status
296 checkModuleNamesAndStatus(cf);
297
298 // mapping of modules to class loaders
299 Function<String, ClassLoader> clf = ModuleLoaderMap.mappingFunction(cf);
300
301 // check that all modules to be mapped to the boot loader will be
302 // loaded from the runtime image
303 if (needPostResolutionChecks) {
304 for (ResolvedModule resolvedModule : cf.modules()) {
305 ModuleReference mref = resolvedModule.reference();
306 String name = mref.descriptor().name();
307 ClassLoader cl = clf.apply(name);
308 if (cl == null) {
309
310 if (upgradeModulePath != null
311 && upgradeModulePath.find(name).isPresent())
312 fail(name + ": cannot be loaded from upgrade module path");
313
314 if (!systemModules.find(name).isPresent())
315 fail(name + ": cannot be loaded from application module path");
316 }
317 }
318
319 // check if module specified in --patch-module is present
320 for (String mn: patcher.patchedModules()) {
321 if (!cf.findModule(mn).isPresent()) {
322 warnUnknownModule(PATCH_MODULE, mn);
323 }
324 }
325 }
326
327 // if needed check that there are no split packages in the set of
328 // resolved modules for the boot layer
329 if (SystemModules.hasSplitPackages() || needPostResolutionChecks) {
330 Map<String, String> packageToModule = new HashMap<>();
331 for (ResolvedModule resolvedModule : cf.modules()) {
332 ModuleDescriptor descriptor =
333 resolvedModule.reference().descriptor();
334 String name = descriptor.name();
335 for (String p : descriptor.packages()) {
336 String other = packageToModule.putIfAbsent(p, name);
337 if (other != null) {
338 fail("Package " + p + " in both module "
339 + name + " and module " + other);
340 }
341 }
342 }
343 }
344
345 long t4 = System.nanoTime();
346
347 // define modules to VM/runtime
348 Layer bootLayer = Layer.empty().defineModules(cf, clf);
349
350 PerfCounters.layerCreateTime.addElapsedTimeFrom(t4);
351
352
353 long t5 = System.nanoTime();
354
355 // define the module to its class loader, except java.base
356 for (ResolvedModule resolvedModule : cf.modules()) {
357 ModuleReference mref = resolvedModule.reference();
358 String name = mref.descriptor().name();
359 ClassLoader cl = clf.apply(name);
360 if (cl == null) {
361 if (!name.equals(JAVA_BASE)) BootLoader.loadModule(mref);
362 } else {
363 ((BuiltinClassLoader)cl).loadModule(mref);
364 }
365 }
366
367 PerfCounters.loadModulesTime.addElapsedTimeFrom(t5);
368
369
370 // --add-reads, -add-exports/-add-opens
371 addExtraReads(bootLayer);
372 addExtraExportsAndOpens(bootLayer);
373
374 // total time to initialize
375 PerfCounters.bootstrapTime.addElapsedTimeFrom(t0);
376
377 // remember the ModuleFinder
378 initialFinder = finder;
379
380 return bootLayer;
381 }
382
383 /**
384 * Returns a ModuleFinder that limits observability to the given root
385 * modules, their transitive dependences, plus a set of other modules.
386 */
387 private static ModuleFinder limitFinder(ModuleFinder finder,
388 Set<String> roots,
389 Set<String> otherMods)
390 {
391 // resolve all root modules
392 Configuration cf = Configuration.empty().resolve(finder,
393 ModuleFinder.of(),
394 roots);
395
396 // module name -> reference
397 Map<String, ModuleReference> map = new HashMap<>();
398
399 // root modules and their transitive dependences
400 cf.modules().stream()
401 .map(ResolvedModule::reference)
402 .forEach(mref -> map.put(mref.descriptor().name(), mref));
403
404 // additional modules
405 otherMods.stream()
406 .map(finder::find)
407 .flatMap(Optional::stream)
408 .forEach(mref -> map.putIfAbsent(mref.descriptor().name(), mref));
409
410 // set of modules that are observable
411 Set<ModuleReference> mrefs = new HashSet<>(map.values());
412
413 return new ModuleFinder() {
414 @Override
415 public Optional<ModuleReference> find(String name) {
416 return Optional.ofNullable(map.get(name));
417 }
418 @Override
419 public Set<ModuleReference> findAll() {
420 return mrefs;
421 }
422 };
423 }
424
425 /**
426 * Creates a finder from the module path that is the value of the given
427 * system property.
428 */
429 private static ModuleFinder createModulePathFinder(String prop) {
430 String s = System.getProperty(prop);
431 if (s == null) {
432 return null;
433 } else {
434 String[] dirs = s.split(File.pathSeparator);
435 Path[] paths = new Path[dirs.length];
436 int i = 0;
437 for (String dir: dirs) {
438 paths[i++] = Paths.get(dir);
439 }
440 return ModuleFinder.of(paths);
441 }
442 }
443
444
445 /**
446 * Initialize the module patcher for the initial configuration passed on the
447 * value of the --patch-module options.
448 */
449 private static ModulePatcher initModulePatcher() {
450 Map<String, List<String>> map = decode("jdk.module.patch.",
451 File.pathSeparator,
452 false);
453 return new ModulePatcher(map);
454 }
455
456 /**
457 * Returns the set of module names specified via --add-modules options
458 * on the command line
459 */
460 private static Set<String> getExtraAddModules() {
461 String prefix = "jdk.module.addmods.";
462 int index = 0;
463
464 // the system property is removed after decoding
465 String value = getAndRemoveProperty(prefix + index);
466 if (value == null) {
467 return Collections.emptySet();
468 }
469
470 Set<String> modules = new HashSet<>();
471 while (value != null) {
472 for (String s : value.split(",")) {
473 if (s.length() > 0) modules.add(s);
474 }
475 index++;
476 value = getAndRemoveProperty(prefix + index);
477 }
478
479 return modules;
480 }
481
482 /**
483 * Process the --add-reads options to add any additional read edges that
484 * are specified on the command-line.
485 */
486 private static void addExtraReads(Layer bootLayer) {
487
488 // decode the command line options
489 Map<String, List<String>> map = decode("jdk.module.addreads.");
490 if (map.isEmpty())
491 return;
492
493 for (Map.Entry<String, List<String>> e : map.entrySet()) {
494
495 // the key is $MODULE
496 String mn = e.getKey();
497 Optional<Module> om = bootLayer.findModule(mn);
498 if (!om.isPresent()) {
499 warnUnknownModule(ADD_READS, mn);
500 continue;
501 }
502 Module m = om.get();
503
504 // the value is the set of other modules (by name)
505 for (String name : e.getValue()) {
506 if (ALL_UNNAMED.equals(name)) {
507 Modules.addReadsAllUnnamed(m);
508 } else {
509 om = bootLayer.findModule(name);
510 if (om.isPresent()) {
511 Modules.addReads(m, om.get());
512 } else {
513 warnUnknownModule(ADD_READS, name);
514 }
515 }
516 }
517 }
518 }
519
520 /**
521 * Process the --add-exports and --add-opens options to export/open
522 * additional packages specified on the command-line.
523 */
524 private static void addExtraExportsAndOpens(Layer bootLayer) {
525
526 // --add-exports
527 String prefix = "jdk.module.addexports.";
528 Map<String, List<String>> extraExports = decode(prefix);
529 if (!extraExports.isEmpty()) {
530 addExtraExportsOrOpens(bootLayer, extraExports, false);
531 }
532
533 // --add-opens
534 prefix = "jdk.module.addopens.";
535 Map<String, List<String>> extraOpens = decode(prefix);
536 if (!extraOpens.isEmpty()) {
537 addExtraExportsOrOpens(bootLayer, extraOpens, true);
538 }
539
540 // DEBUG_ADD_OPENS is for debugging purposes only
541 String home = System.getProperty("java.home");
542 Path file = Paths.get(home, "conf", "DEBUG_ADD_OPENS");
543 if (Files.exists(file)) {
544 warn(file + " detected; may break encapsulation");
545 try (Stream<String> lines = Files.lines(file)) {
546 lines.map(line -> line.trim())
547 .filter(line -> (!line.isEmpty() && !line.startsWith("#")))
548 .forEach(line -> {
549 String[] s = line.split("/");
550 if (s.length != 2) {
551 fail("Unable to parse as <module>/<package>: " + line);
552 } else {
553 String mn = s[0];
554 String pkg = s[1];
555 openPackage(bootLayer, mn, pkg);
556 }
557 });
558 } catch (IOException ioe) {
559 throw new UncheckedIOException(ioe);
560 }
561 }
562 }
563
564 private static void openPackage(Layer bootLayer, String mn, String pkg) {
565 if (mn.equals("ALL-RESOLVED") && pkg.equals("ALL-PACKAGES")) {
566 bootLayer.modules().stream().forEach(m ->
567 m.getDescriptor().packages().forEach(pn -> openPackage(m, pn)));
568 } else {
569 bootLayer.findModule(mn)
570 .filter(m -> m.getDescriptor().packages().contains(pkg))
571 .ifPresent(m -> openPackage(m, pkg));
572 }
573 }
574
575 private static void openPackage(Module m, String pn) {
576 Modules.addOpensToAllUnnamed(m, pn);
577 warn("Opened for deep reflection: " + m.getName() + "/" + pn);
578 }
579
580
581 private static void addExtraExportsOrOpens(Layer bootLayer,
582 Map<String, List<String>> map,
583 boolean opens)
584 {
585 String option = opens ? ADD_OPENS : ADD_EXPORTS;
586 for (Map.Entry<String, List<String>> e : map.entrySet()) {
587
588 // the key is $MODULE/$PACKAGE
589 String key = e.getKey();
590 String[] s = key.split("/");
591 if (s.length != 2)
592 fail(unableToParse(option, "<module>/<package>", key));
593
594 String mn = s[0];
595 String pn = s[1];
596 if (mn.isEmpty() || pn.isEmpty())
597 fail(unableToParse(option, "<module>/<package>", key));
598
599 // The exporting module is in the boot layer
600 Module m;
601 Optional<Module> om = bootLayer.findModule(mn);
602 if (!om.isPresent()) {
603 warnUnknownModule(option, mn);
604 continue;
605 }
606
607 m = om.get();
608
609 if (!m.getDescriptor().packages().contains(pn)) {
610 warn("package " + pn + " not in " + mn);
611 continue;
612 }
613
614 // the value is the set of modules to export to (by name)
615 for (String name : e.getValue()) {
616 boolean allUnnamed = false;
617 Module other = null;
618 if (ALL_UNNAMED.equals(name)) {
619 allUnnamed = true;
620 } else {
621 om = bootLayer.findModule(name);
622 if (om.isPresent()) {
623 other = om.get();
624 } else {
625 warnUnknownModule(option, name);
626 continue;
627 }
628 }
629 if (allUnnamed) {
630 if (opens) {
631 Modules.addOpensToAllUnnamed(m, pn);
632 } else {
633 Modules.addExportsToAllUnnamed(m, pn);
634 }
635 } else {
636 if (opens) {
637 Modules.addOpens(m, pn, other);
638 } else {
639 Modules.addExports(m, pn, other);
640 }
641 }
642
643 }
644 }
645 }
646
647 /**
648 * Decodes the values of --add-reads, -add-exports, --add-opens or
649 * --patch-modules options that are encoded in system properties.
650 *
651 * @param prefix the system property prefix
652 * @praam regex the regex for splitting the RHS of the option value
653 */
654 private static Map<String, List<String>> decode(String prefix,
655 String regex,
656 boolean allowDuplicates) {
657 int index = 0;
658 // the system property is removed after decoding
659 String value = getAndRemoveProperty(prefix + index);
660 if (value == null)
661 return Collections.emptyMap();
662
663 Map<String, List<String>> map = new HashMap<>();
664
665 while (value != null) {
666
667 int pos = value.indexOf('=');
668 if (pos == -1)
669 fail(unableToParse(option(prefix), "<module>=<value>", value));
670 if (pos == 0)
671 fail(unableToParse(option(prefix), "<module>=<value>", value));
672
673 // key is <module> or <module>/<package>
674 String key = value.substring(0, pos);
675
676 String rhs = value.substring(pos+1);
677 if (rhs.isEmpty())
678 fail(unableToParse(option(prefix), "<module>=<value>", value));
679
680 // value is <module>(,<module>)* or <file>(<pathsep><file>)*
681 if (!allowDuplicates && map.containsKey(key))
682 fail(key + " specified more than once in " + option(prefix));
683 List<String> values = map.computeIfAbsent(key, k -> new ArrayList<>());
684 int ntargets = 0;
685 for (String s : rhs.split(regex)) {
686 if (s.length() > 0) {
687 values.add(s);
688 ntargets++;
689 }
690 }
691 if (ntargets == 0)
692 fail("Target must be specified: " + option(prefix) + " " + value);
693
694 index++;
695 value = getAndRemoveProperty(prefix + index);
696 }
697
698 return map;
699 }
700
701 /**
702 * Decodes the values of --add-reads, -add-exports or --add-opens
703 * which use the "," to separate the RHS of the option value.
704 */
705 private static Map<String, List<String>> decode(String prefix) {
706 return decode(prefix, ",", true);
707 }
708
709 /**
710 * Gets and remove the named system property
711 */
712 private static String getAndRemoveProperty(String key) {
713 return (String)System.getProperties().remove(key);
714 }
715
716 /**
717 * Checks the names and resolution bit of each module in the configuration,
718 * emitting warnings if needed.
719 */
720 private static void checkModuleNamesAndStatus(Configuration cf) {
721 String incubating = null;
722 for (ResolvedModule rm : cf.modules()) {
723 ModuleReference mref = rm.reference();
724 String mn = mref.descriptor().name();
725
726 // emit warning if module name ends with a non-Java letter
727 if (!Checks.hasLegalModuleNameLastCharacter(mn))
728 warn("Module name \"" + mn + "\" may soon be illegal");
729
730 // emit warning if the WARN_INCUBATING module resolution bit set
731 if (ModuleResolution.hasIncubatingWarning(mref)) {
732 if (incubating == null) {
733 incubating = mn;
734 } else {
735 incubating += ", " + mn;
736 }
737 }
738 }
739 if (incubating != null)
740 warn("Using incubator modules: " + incubating);
741 }
742
743 /**
744 * Throws a RuntimeException with the given message
745 */
746 static void fail(String m) {
747 throw new RuntimeException(m);
748 }
749
750 static void warn(String m) {
751 System.err.println("WARNING: " + m);
752 }
753
754 static void warnUnknownModule(String option, String mn) {
755 warn("Unknown module: " + mn + " specified in " + option);
756 }
757
758 static String unableToParse(String option, String text, String value) {
759 return "Unable to parse " + option + " " + text + ": " + value;
760 }
761
762 private static final String ADD_MODULES = "--add-modules";
763 private static final String ADD_EXPORTS = "--add-exports";
764 private static final String ADD_OPENS = "--add-opens";
765 private static final String ADD_READS = "--add-reads";
766 private static final String PATCH_MODULE = "--patch-module";
767
768
769 /*
770 * Returns the command-line option name corresponds to the specified
771 * system property prefix.
772 */
773 static String option(String prefix) {
774 switch (prefix) {
775 case "jdk.module.addexports.":
776 return ADD_EXPORTS;
777 case "jdk.module.addopens.":
778 return ADD_OPENS;
779 case "jdk.module.addreads.":
780 return ADD_READS;
781 case "jdk.module.patch.":
782 return PATCH_MODULE;
783 case "jdk.module.addmods.":
784 return ADD_MODULES;
785 default:
786 throw new IllegalArgumentException(prefix);
787 }
788 }
789
790 static class PerfCounters {
791
792 static PerfCounter systemModulesTime
793 = PerfCounter.newPerfCounter("jdk.module.bootstrap.systemModulesTime");
794 static PerfCounter defineBaseTime
795 = PerfCounter.newPerfCounter("jdk.module.bootstrap.defineBaseTime");
796 static PerfCounter optionsAndRootsTime
797 = PerfCounter.newPerfCounter("jdk.module.bootstrap.optionsAndRootsTime");
798 static PerfCounter resolveTime
799 = PerfCounter.newPerfCounter("jdk.module.bootstrap.resolveTime");
800 static PerfCounter layerCreateTime
801 = PerfCounter.newPerfCounter("jdk.module.bootstrap.layerCreateTime");
802 static PerfCounter loadModulesTime
803 = PerfCounter.newPerfCounter("jdk.module.bootstrap.loadModulesTime");
804 static PerfCounter bootstrapTime
805 = PerfCounter.newPerfCounter("jdk.module.bootstrap.totalTime");
806 }
807 }