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