| /* |
| * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.internal.module; |
| |
| import java.io.File; |
| import java.io.PrintStream; |
| import java.lang.module.Configuration; |
| import java.lang.module.ModuleDescriptor; |
| import java.lang.module.ModuleFinder; |
| import java.lang.module.ModuleReference; |
| import java.lang.module.ResolvedModule; |
| import java.net.URI; |
| import java.nio.file.Path; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.NoSuchElementException; |
| import java.util.Objects; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.function.Function; |
| import java.util.stream.Collectors; |
| |
| import jdk.internal.loader.BootLoader; |
| import jdk.internal.loader.BuiltinClassLoader; |
| import jdk.internal.misc.JavaLangAccess; |
| import jdk.internal.misc.JavaLangModuleAccess; |
| import jdk.internal.misc.SharedSecrets; |
| import jdk.internal.perf.PerfCounter; |
| |
| /** |
| * Initializes/boots the module system. |
| * |
| * The {@link #boot() boot} method is called early in the startup to initialize |
| * the module system. In summary, the boot method creates a Configuration by |
| * resolving a set of module names specified via the launcher (or equivalent) |
| * -m and --add-modules options. The modules are located on a module path that |
| * is constructed from the upgrade module path, system modules, and application |
| * module path. The Configuration is instantiated as the boot layer with each |
| * module in the configuration defined to a class loader. |
| */ |
| |
| public final class ModuleBootstrap { |
| private ModuleBootstrap() { } |
| |
| private static final String JAVA_BASE = "java.base"; |
| |
| // the token for "all default modules" |
| private static final String ALL_DEFAULT = "ALL-DEFAULT"; |
| |
| // the token for "all unnamed modules" |
| private static final String ALL_UNNAMED = "ALL-UNNAMED"; |
| |
| // the token for "all system modules" |
| private static final String ALL_SYSTEM = "ALL-SYSTEM"; |
| |
| // the token for "all modules on the module path" |
| private static final String ALL_MODULE_PATH = "ALL-MODULE-PATH"; |
| |
| // access to java.lang/module |
| private static final JavaLangModuleAccess JLMA |
| = SharedSecrets.getJavaLangModuleAccess(); |
| |
| // The ModulePatcher for the initial configuration |
| private static final ModulePatcher patcher = initModulePatcher(); |
| |
| /** |
| * Returns the ModulePatcher for the initial configuration. |
| */ |
| public static ModulePatcher patcher() { |
| return patcher; |
| } |
| |
| // ModuleFinders for the initial configuration |
| private static volatile ModuleFinder unlimitedFinder; |
| private static volatile ModuleFinder limitedFinder; |
| |
| /** |
| * Returns the ModuleFinder for the initial configuration before |
| * observability is limited by the --limit-modules command line option. |
| * |
| * @apiNote Used to support locating modules {@code java.instrument} and |
| * {@code jdk.management.agent} modules when they are loaded dynamically. |
| */ |
| public static ModuleFinder unlimitedFinder() { |
| ModuleFinder finder = unlimitedFinder; |
| if (finder == null) { |
| return ModuleFinder.ofSystem(); |
| } else { |
| return finder; |
| } |
| } |
| |
| /** |
| * Returns the ModuleFinder for the initial configuration. |
| * |
| * @apiNote Used to support "{@code java --list-modules}". |
| */ |
| public static ModuleFinder limitedFinder() { |
| ModuleFinder finder = limitedFinder; |
| if (finder == null) { |
| return unlimitedFinder(); |
| } else { |
| return finder; |
| } |
| } |
| |
| /** |
| * Initialize the module system, returning the boot layer. |
| * |
| * @see java.lang.System#initPhase2(boolean, boolean) |
| */ |
| public static ModuleLayer boot() throws Exception { |
| |
| // Step 0: Command line options |
| |
| long t0 = System.nanoTime(); |
| |
| ModuleFinder upgradeModulePath = finderFor("jdk.module.upgrade.path"); |
| ModuleFinder appModulePath = finderFor("jdk.module.path"); |
| boolean isPatched = patcher.hasPatches(); |
| |
| String mainModule = System.getProperty("jdk.module.main"); |
| Set<String> addModules = addModules(); |
| Set<String> limitModules = limitModules(); |
| |
| PrintStream traceOutput = null; |
| String trace = getAndRemoveProperty("jdk.module.showModuleResolution"); |
| if (trace != null && Boolean.parseBoolean(trace)) |
| traceOutput = System.out; |
| |
| |
| // Step 1: The observable system modules, either all system modules |
| // or the system modules pre-generated for the initial module (the |
| // initial module may be the unnamed module). If the system modules |
| // are pre-generated for the initial module then resolution can be |
| // skipped. |
| |
| long t1 = System.nanoTime(); |
| |
| SystemModules systemModules = null; |
| ModuleFinder systemModuleFinder; |
| |
| boolean haveModulePath = (appModulePath != null || upgradeModulePath != null); |
| boolean needResolution = true; |
| |
| if (!haveModulePath && addModules.isEmpty() && limitModules.isEmpty()) { |
| systemModules = SystemModuleFinders.systemModules(mainModule); |
| if (systemModules != null && !isPatched && (traceOutput == null)) { |
| needResolution = false; |
| } |
| } |
| if (systemModules == null) { |
| // all system modules are observable |
| systemModules = SystemModuleFinders.allSystemModules(); |
| } |
| if (systemModules != null) { |
| // images build |
| systemModuleFinder = SystemModuleFinders.of(systemModules); |
| } else { |
| // exploded build or testing |
| systemModules = new ExplodedSystemModules(); |
| systemModuleFinder = SystemModuleFinders.ofSystem(); |
| } |
| |
| Counters.add("jdk.module.boot.1.systemModulesTime", t1); |
| |
| |
| // Step 2: Define and load java.base. This patches all classes loaded |
| // to date so that they are members of java.base. Once java.base is |
| // loaded then resources in java.base are available for error messages |
| // needed from here on. |
| |
| long t2 = System.nanoTime(); |
| |
| ModuleReference base = systemModuleFinder.find(JAVA_BASE).orElse(null); |
| if (base == null) |
| throw new InternalError(JAVA_BASE + " not found"); |
| URI baseUri = base.location().orElse(null); |
| if (baseUri == null) |
| throw new InternalError(JAVA_BASE + " does not have a location"); |
| BootLoader.loadModule(base); |
| Modules.defineModule(null, base.descriptor(), baseUri); |
| |
| Counters.add("jdk.module.boot.2.defineBaseTime", t2); |
| |
| |
| // Step 2a: Scan all modules when --validate-modules specified |
| |
| if (getAndRemoveProperty("jdk.module.validation") != null) { |
| int errors = ModulePathValidator.scanAllModules(System.out); |
| if (errors > 0) { |
| fail("Validation of module path failed"); |
| } |
| } |
| |
| |
| // Step 3: If resolution is needed then create the module finder and |
| // the set of root modules to resolve. |
| |
| long t3 = System.nanoTime(); |
| |
| ModuleFinder savedModuleFinder = null; |
| ModuleFinder finder; |
| Set<String> roots; |
| if (needResolution) { |
| |
| // upgraded modules override the modules in the run-time image |
| if (upgradeModulePath != null) |
| systemModuleFinder = ModuleFinder.compose(upgradeModulePath, |
| systemModuleFinder); |
| |
| // The module finder: [--upgrade-module-path] system [--module-path] |
| if (appModulePath != null) { |
| finder = ModuleFinder.compose(systemModuleFinder, appModulePath); |
| } else { |
| finder = systemModuleFinder; |
| } |
| |
| // The root modules to resolve |
| roots = new HashSet<>(); |
| |
| // launcher -m option to specify the main/initial module |
| if (mainModule != null) |
| roots.add(mainModule); |
| |
| // additional module(s) specified by --add-modules |
| boolean addAllDefaultModules = false; |
| boolean addAllSystemModules = false; |
| boolean addAllApplicationModules = false; |
| for (String mod : addModules) { |
| switch (mod) { |
| case ALL_DEFAULT: |
| addAllDefaultModules = true; |
| break; |
| case ALL_SYSTEM: |
| addAllSystemModules = true; |
| break; |
| case ALL_MODULE_PATH: |
| addAllApplicationModules = true; |
| break; |
| default: |
| roots.add(mod); |
| } |
| } |
| |
| // --limit-modules |
| savedModuleFinder = finder; |
| if (!limitModules.isEmpty()) { |
| finder = limitFinder(finder, limitModules, roots); |
| } |
| |
| // If there is no initial module specified then assume that the initial |
| // module is the unnamed module of the application class loader. This |
| // is implemented by resolving "java.se" and all (non-java.*) modules |
| // that export an API. If "java.se" is not observable then all java.* |
| // modules are resolved. Modules that have the DO_NOT_RESOLVE_BY_DEFAULT |
| // bit set in their ModuleResolution attribute flags are excluded from |
| // the default set of roots. |
| if (mainModule == null || addAllDefaultModules) { |
| roots.addAll(DefaultRoots.compute(systemModuleFinder, finder)); |
| } |
| |
| // If `--add-modules ALL-SYSTEM` is specified then all observable system |
| // modules will be resolved. |
| if (addAllSystemModules) { |
| ModuleFinder f = finder; // observable modules |
| systemModuleFinder.findAll() |
| .stream() |
| .map(ModuleReference::descriptor) |
| .map(ModuleDescriptor::name) |
| .filter(mn -> f.find(mn).isPresent()) // observable |
| .forEach(mn -> roots.add(mn)); |
| } |
| |
| // If `--add-modules ALL-MODULE-PATH` is specified then all observable |
| // modules on the application module path will be resolved. |
| if (appModulePath != null && addAllApplicationModules) { |
| ModuleFinder f = finder; // observable modules |
| appModulePath.findAll() |
| .stream() |
| .map(ModuleReference::descriptor) |
| .map(ModuleDescriptor::name) |
| .filter(mn -> f.find(mn).isPresent()) // observable |
| .forEach(mn -> roots.add(mn)); |
| } |
| } else { |
| // no resolution case |
| finder = systemModuleFinder; |
| roots = null; |
| } |
| |
| Counters.add("jdk.module.boot.3.optionsAndRootsTime", t3); |
| |
| // Step 4: Resolve the root modules, with service binding, to create |
| // the configuration for the boot layer. If resolution is not needed |
| // then create the configuration for the boot layer from the |
| // readability graph created at link time. |
| |
| long t4 = System.nanoTime(); |
| |
| Configuration cf; |
| if (needResolution) { |
| cf = JLMA.resolveAndBind(finder, roots, traceOutput); |
| } else { |
| Map<String, Set<String>> map = systemModules.moduleReads(); |
| cf = JLMA.newConfiguration(systemModuleFinder, map); |
| } |
| |
| // check that modules specified to --patch-module are resolved |
| if (isPatched) { |
| patcher.patchedModules() |
| .stream() |
| .filter(mn -> !cf.findModule(mn).isPresent()) |
| .forEach(mn -> warnUnknownModule(PATCH_MODULE, mn)); |
| } |
| |
| Counters.add("jdk.module.boot.4.resolveTime", t4); |
| |
| |
| // Step 5: Map the modules in the configuration to class loaders. |
| // The static configuration provides the mapping of standard and JDK |
| // modules to the boot and platform loaders. All other modules (JDK |
| // tool modules, and both explicit and automatic modules on the |
| // application module path) are defined to the application class |
| // loader. |
| |
| long t5 = System.nanoTime(); |
| |
| // mapping of modules to class loaders |
| Function<String, ClassLoader> clf = ModuleLoaderMap.mappingFunction(cf); |
| |
| // check that all modules to be mapped to the boot loader will be |
| // loaded from the runtime image |
| if (haveModulePath) { |
| for (ResolvedModule resolvedModule : cf.modules()) { |
| ModuleReference mref = resolvedModule.reference(); |
| String name = mref.descriptor().name(); |
| ClassLoader cl = clf.apply(name); |
| if (cl == null) { |
| if (upgradeModulePath != null |
| && upgradeModulePath.find(name).isPresent()) |
| fail(name + ": cannot be loaded from upgrade module path"); |
| if (!systemModuleFinder.find(name).isPresent()) |
| fail(name + ": cannot be loaded from application module path"); |
| } |
| } |
| } |
| |
| // check for split packages in the modules mapped to the built-in loaders |
| if (systemModules.hasSplitPackages() || isPatched || haveModulePath) { |
| checkSplitPackages(cf, clf); |
| } |
| |
| // load/register the modules with the built-in class loaders |
| loadModules(cf, clf); |
| |
| Counters.add("jdk.module.boot.5.loadModulesTime", t5); |
| |
| |
| // Step 6: Define all modules to the VM |
| |
| long t6 = System.nanoTime(); |
| ModuleLayer bootLayer = ModuleLayer.empty().defineModules(cf, clf); |
| Counters.add("jdk.module.boot.6.layerCreateTime", t6); |
| |
| |
| // Step 7: Miscellaneous |
| |
| // check incubating status |
| if (systemModules.hasIncubatorModules() || haveModulePath) { |
| checkIncubatingStatus(cf); |
| } |
| |
| // --add-reads, --add-exports/--add-opens, and --illegal-access |
| long t7 = System.nanoTime(); |
| addExtraReads(bootLayer); |
| boolean extraExportsOrOpens = addExtraExportsAndOpens(bootLayer); |
| addIllegalAccess(upgradeModulePath, systemModules, bootLayer, extraExportsOrOpens); |
| Counters.add("jdk.module.boot.7.adjustModulesTime", t7); |
| |
| // save module finders for later use |
| if (savedModuleFinder != null) { |
| unlimitedFinder = new SafeModuleFinder(savedModuleFinder); |
| if (savedModuleFinder != finder) |
| limitedFinder = new SafeModuleFinder(finder); |
| } |
| |
| // total time to initialize |
| Counters.add("jdk.module.boot.totalTime", t0); |
| Counters.publish(); |
| |
| return bootLayer; |
| } |
| |
| /** |
| * Load/register the modules to the built-in class loaders. |
| */ |
| private static void loadModules(Configuration cf, |
| Function<String, ClassLoader> clf) { |
| for (ResolvedModule resolvedModule : cf.modules()) { |
| ModuleReference mref = resolvedModule.reference(); |
| String name = resolvedModule.name(); |
| ClassLoader loader = clf.apply(name); |
| if (loader == null) { |
| // skip java.base as it is already loaded |
| if (!name.equals(JAVA_BASE)) { |
| BootLoader.loadModule(mref); |
| } |
| } else if (loader instanceof BuiltinClassLoader) { |
| ((BuiltinClassLoader) loader).loadModule(mref); |
| } |
| } |
| } |
| |
| /** |
| * Checks for split packages between modules defined to the built-in class |
| * loaders. |
| */ |
| private static void checkSplitPackages(Configuration cf, |
| Function<String, ClassLoader> clf) { |
| Map<String, String> packageToModule = new HashMap<>(); |
| for (ResolvedModule resolvedModule : cf.modules()) { |
| ModuleDescriptor descriptor = resolvedModule.reference().descriptor(); |
| String name = descriptor.name(); |
| ClassLoader loader = clf.apply(name); |
| if (loader == null || loader instanceof BuiltinClassLoader) { |
| for (String p : descriptor.packages()) { |
| String other = packageToModule.putIfAbsent(p, name); |
| if (other != null) { |
| String msg = "Package " + p + " in both module " |
| + name + " and module " + other; |
| throw new LayerInstantiationException(msg); |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Returns a ModuleFinder that limits observability to the given root |
| * modules, their transitive dependences, plus a set of other modules. |
| */ |
| private static ModuleFinder limitFinder(ModuleFinder finder, |
| Set<String> roots, |
| Set<String> otherMods) |
| { |
| // resolve all root modules |
| Configuration cf = Configuration.empty().resolve(finder, |
| ModuleFinder.of(), |
| roots); |
| |
| // module name -> reference |
| Map<String, ModuleReference> map = new HashMap<>(); |
| |
| // root modules and their transitive dependences |
| cf.modules().stream() |
| .map(ResolvedModule::reference) |
| .forEach(mref -> map.put(mref.descriptor().name(), mref)); |
| |
| // additional modules |
| otherMods.stream() |
| .map(finder::find) |
| .flatMap(Optional::stream) |
| .forEach(mref -> map.putIfAbsent(mref.descriptor().name(), mref)); |
| |
| // set of modules that are observable |
| Set<ModuleReference> mrefs = new HashSet<>(map.values()); |
| |
| return new ModuleFinder() { |
| @Override |
| public Optional<ModuleReference> find(String name) { |
| return Optional.ofNullable(map.get(name)); |
| } |
| @Override |
| public Set<ModuleReference> findAll() { |
| return mrefs; |
| } |
| }; |
| } |
| |
| /** |
| * Creates a finder from the module path that is the value of the given |
| * system property and optionally patched by --patch-module |
| */ |
| private static ModuleFinder finderFor(String prop) { |
| String s = System.getProperty(prop); |
| if (s == null) { |
| return null; |
| } else { |
| String[] dirs = s.split(File.pathSeparator); |
| Path[] paths = new Path[dirs.length]; |
| int i = 0; |
| for (String dir: dirs) { |
| paths[i++] = Path.of(dir); |
| } |
| return ModulePath.of(patcher, paths); |
| } |
| } |
| |
| /** |
| * Initialize the module patcher for the initial configuration passed on the |
| * value of the --patch-module options. |
| */ |
| private static ModulePatcher initModulePatcher() { |
| Map<String, List<String>> map = decode("jdk.module.patch.", |
| File.pathSeparator, |
| false); |
| return new ModulePatcher(map); |
| } |
| |
| /** |
| * Returns the set of module names specified by --add-module options. |
| */ |
| private static Set<String> addModules() { |
| String prefix = "jdk.module.addmods."; |
| int index = 0; |
| // the system property is removed after decoding |
| String value = getAndRemoveProperty(prefix + index); |
| if (value == null) { |
| return Collections.emptySet(); |
| } else { |
| Set<String> modules = new HashSet<>(); |
| while (value != null) { |
| for (String s : value.split(",")) { |
| if (s.length() > 0) modules.add(s); |
| } |
| index++; |
| value = getAndRemoveProperty(prefix + index); |
| } |
| return modules; |
| } |
| } |
| |
| /** |
| * Returns the set of module names specified by --limit-modules. |
| */ |
| private static Set<String> limitModules() { |
| String value = getAndRemoveProperty("jdk.module.limitmods"); |
| if (value == null) { |
| return Collections.emptySet(); |
| } else { |
| Set<String> names = new HashSet<>(); |
| for (String name : value.split(",")) { |
| if (name.length() > 0) names.add(name); |
| } |
| return names; |
| } |
| } |
| |
| /** |
| * Process the --add-reads options to add any additional read edges that |
| * are specified on the command-line. |
| */ |
| private static void addExtraReads(ModuleLayer bootLayer) { |
| |
| // decode the command line options |
| Map<String, List<String>> map = decode("jdk.module.addreads."); |
| if (map.isEmpty()) |
| return; |
| |
| for (Map.Entry<String, List<String>> e : map.entrySet()) { |
| |
| // the key is $MODULE |
| String mn = e.getKey(); |
| Optional<Module> om = bootLayer.findModule(mn); |
| if (!om.isPresent()) { |
| warnUnknownModule(ADD_READS, mn); |
| continue; |
| } |
| Module m = om.get(); |
| |
| // the value is the set of other modules (by name) |
| for (String name : e.getValue()) { |
| if (ALL_UNNAMED.equals(name)) { |
| Modules.addReadsAllUnnamed(m); |
| } else { |
| om = bootLayer.findModule(name); |
| if (om.isPresent()) { |
| Modules.addReads(m, om.get()); |
| } else { |
| warnUnknownModule(ADD_READS, name); |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Process the --add-exports and --add-opens options to export/open |
| * additional packages specified on the command-line. |
| */ |
| private static boolean addExtraExportsAndOpens(ModuleLayer bootLayer) { |
| boolean extraExportsOrOpens = false; |
| |
| // --add-exports |
| String prefix = "jdk.module.addexports."; |
| Map<String, List<String>> extraExports = decode(prefix); |
| if (!extraExports.isEmpty()) { |
| addExtraExportsOrOpens(bootLayer, extraExports, false); |
| extraExportsOrOpens = true; |
| } |
| |
| |
| // --add-opens |
| prefix = "jdk.module.addopens."; |
| Map<String, List<String>> extraOpens = decode(prefix); |
| if (!extraOpens.isEmpty()) { |
| addExtraExportsOrOpens(bootLayer, extraOpens, true); |
| extraExportsOrOpens = true; |
| } |
| |
| return extraExportsOrOpens; |
| } |
| |
| private static void addExtraExportsOrOpens(ModuleLayer bootLayer, |
| Map<String, List<String>> map, |
| boolean opens) |
| { |
| String option = opens ? ADD_OPENS : ADD_EXPORTS; |
| for (Map.Entry<String, List<String>> e : map.entrySet()) { |
| |
| // the key is $MODULE/$PACKAGE |
| String key = e.getKey(); |
| String[] s = key.split("/"); |
| if (s.length != 2) |
| fail(unableToParse(option, "<module>/<package>", key)); |
| |
| String mn = s[0]; |
| String pn = s[1]; |
| if (mn.isEmpty() || pn.isEmpty()) |
| fail(unableToParse(option, "<module>/<package>", key)); |
| |
| // The exporting module is in the boot layer |
| Module m; |
| Optional<Module> om = bootLayer.findModule(mn); |
| if (!om.isPresent()) { |
| warnUnknownModule(option, mn); |
| continue; |
| } |
| |
| m = om.get(); |
| |
| if (!m.getDescriptor().packages().contains(pn)) { |
| warn("package " + pn + " not in " + mn); |
| continue; |
| } |
| |
| // the value is the set of modules to export to (by name) |
| for (String name : e.getValue()) { |
| boolean allUnnamed = false; |
| Module other = null; |
| if (ALL_UNNAMED.equals(name)) { |
| allUnnamed = true; |
| } else { |
| om = bootLayer.findModule(name); |
| if (om.isPresent()) { |
| other = om.get(); |
| } else { |
| warnUnknownModule(option, name); |
| continue; |
| } |
| } |
| if (allUnnamed) { |
| if (opens) { |
| Modules.addOpensToAllUnnamed(m, pn); |
| } else { |
| Modules.addExportsToAllUnnamed(m, pn); |
| } |
| } else { |
| if (opens) { |
| Modules.addOpens(m, pn, other); |
| } else { |
| Modules.addExports(m, pn, other); |
| } |
| } |
| |
| } |
| } |
| } |
| |
| /** |
| * Process the --illegal-access option (and its default) to open packages |
| * of system modules in the boot layer to code in unnamed modules. |
| */ |
| private static void addIllegalAccess(ModuleFinder upgradeModulePath, |
| SystemModules systemModules, |
| ModuleLayer bootLayer, |
| boolean extraExportsOrOpens) { |
| String value = getAndRemoveProperty("jdk.module.illegalAccess"); |
| IllegalAccessLogger.Mode mode = IllegalAccessLogger.Mode.ONESHOT; |
| if (value != null) { |
| switch (value) { |
| case "deny": |
| return; |
| case "permit": |
| break; |
| case "warn": |
| mode = IllegalAccessLogger.Mode.WARN; |
| break; |
| case "debug": |
| mode = IllegalAccessLogger.Mode.DEBUG; |
| break; |
| default: |
| fail("Value specified to --illegal-access not recognized:" |
| + " '" + value + "'"); |
| return; |
| } |
| } |
| IllegalAccessLogger.Builder builder |
| = new IllegalAccessLogger.Builder(mode, System.err); |
| |
| Map<String, Set<String>> map1 = systemModules.concealedPackagesToOpen(); |
| Map<String, Set<String>> map2 = systemModules.exportedPackagesToOpen(); |
| if (map1.isEmpty() && map2.isEmpty()) { |
| // need to generate (exploded build) |
| IllegalAccessMaps maps = IllegalAccessMaps.generate(limitedFinder()); |
| map1 = maps.concealedPackagesToOpen(); |
| map2 = maps.exportedPackagesToOpen(); |
| } |
| |
| // open specific packages in the system modules |
| for (Module m : bootLayer.modules()) { |
| ModuleDescriptor descriptor = m.getDescriptor(); |
| String name = m.getName(); |
| |
| // skip open modules |
| if (descriptor.isOpen()) { |
| continue; |
| } |
| |
| // skip modules loaded from the upgrade module path |
| if (upgradeModulePath != null |
| && upgradeModulePath.find(name).isPresent()) { |
| continue; |
| } |
| |
| Set<String> concealedPackages = map1.getOrDefault(name, Set.of()); |
| Set<String> exportedPackages = map2.getOrDefault(name, Set.of()); |
| |
| // refresh the set of concealed and exported packages if needed |
| if (extraExportsOrOpens) { |
| concealedPackages = new HashSet<>(concealedPackages); |
| exportedPackages = new HashSet<>(exportedPackages); |
| Iterator<String> iterator = concealedPackages.iterator(); |
| while (iterator.hasNext()) { |
| String pn = iterator.next(); |
| if (m.isExported(pn, BootLoader.getUnnamedModule())) { |
| // concealed package is exported to ALL-UNNAMED |
| iterator.remove(); |
| exportedPackages.add(pn); |
| } |
| } |
| iterator = exportedPackages.iterator(); |
| while (iterator.hasNext()) { |
| String pn = iterator.next(); |
| if (m.isOpen(pn, BootLoader.getUnnamedModule())) { |
| // exported package is opened to ALL-UNNAMED |
| iterator.remove(); |
| } |
| } |
| } |
| |
| // log reflective access to all types in concealed packages |
| builder.logAccessToConcealedPackages(m, concealedPackages); |
| |
| // log reflective access to non-public members/types in exported packages |
| builder.logAccessToExportedPackages(m, exportedPackages); |
| |
| // open the packages to unnamed modules |
| JavaLangAccess jla = SharedSecrets.getJavaLangAccess(); |
| jla.addOpensToAllUnnamed(m, concat(concealedPackages.iterator(), |
| exportedPackages.iterator())); |
| } |
| |
| builder.complete(); |
| } |
| |
| /** |
| * Decodes the values of --add-reads, -add-exports, --add-opens or |
| * --patch-modules options that are encoded in system properties. |
| * |
| * @param prefix the system property prefix |
| * @praam regex the regex for splitting the RHS of the option value |
| */ |
| private static Map<String, List<String>> decode(String prefix, |
| String regex, |
| boolean allowDuplicates) { |
| int index = 0; |
| // the system property is removed after decoding |
| String value = getAndRemoveProperty(prefix + index); |
| if (value == null) |
| return Collections.emptyMap(); |
| |
| Map<String, List<String>> map = new HashMap<>(); |
| |
| while (value != null) { |
| |
| int pos = value.indexOf('='); |
| if (pos == -1) |
| fail(unableToParse(option(prefix), "<module>=<value>", value)); |
| if (pos == 0) |
| fail(unableToParse(option(prefix), "<module>=<value>", value)); |
| |
| // key is <module> or <module>/<package> |
| String key = value.substring(0, pos); |
| |
| String rhs = value.substring(pos+1); |
| if (rhs.isEmpty()) |
| fail(unableToParse(option(prefix), "<module>=<value>", value)); |
| |
| // value is <module>(,<module>)* or <file>(<pathsep><file>)* |
| if (!allowDuplicates && map.containsKey(key)) |
| fail(key + " specified more than once to " + option(prefix)); |
| List<String> values = map.computeIfAbsent(key, k -> new ArrayList<>()); |
| int ntargets = 0; |
| for (String s : rhs.split(regex)) { |
| if (s.length() > 0) { |
| values.add(s); |
| ntargets++; |
| } |
| } |
| if (ntargets == 0) |
| fail("Target must be specified: " + option(prefix) + " " + value); |
| |
| index++; |
| value = getAndRemoveProperty(prefix + index); |
| } |
| |
| return map; |
| } |
| |
| /** |
| * Decodes the values of --add-reads, -add-exports or --add-opens |
| * which use the "," to separate the RHS of the option value. |
| */ |
| private static Map<String, List<String>> decode(String prefix) { |
| return decode(prefix, ",", true); |
| } |
| |
| /** |
| * Gets and remove the named system property |
| */ |
| private static String getAndRemoveProperty(String key) { |
| return (String)System.getProperties().remove(key); |
| } |
| |
| /** |
| * Checks incubating status of modules in the configuration |
| */ |
| private static void checkIncubatingStatus(Configuration cf) { |
| String incubating = null; |
| for (ResolvedModule resolvedModule : cf.modules()) { |
| ModuleReference mref = resolvedModule.reference(); |
| |
| // emit warning if the WARN_INCUBATING module resolution bit set |
| if (ModuleResolution.hasIncubatingWarning(mref)) { |
| String mn = mref.descriptor().name(); |
| if (incubating == null) { |
| incubating = mn; |
| } else { |
| incubating += ", " + mn; |
| } |
| } |
| } |
| if (incubating != null) |
| warn("Using incubator modules: " + incubating); |
| } |
| |
| /** |
| * Throws a RuntimeException with the given message |
| */ |
| static void fail(String m) { |
| throw new RuntimeException(m); |
| } |
| |
| static void warn(String m) { |
| System.err.println("WARNING: " + m); |
| } |
| |
| static void warnUnknownModule(String option, String mn) { |
| warn("Unknown module: " + mn + " specified to " + option); |
| } |
| |
| static String unableToParse(String option, String text, String value) { |
| return "Unable to parse " + option + " " + text + ": " + value; |
| } |
| |
| private static final String ADD_MODULES = "--add-modules"; |
| private static final String ADD_EXPORTS = "--add-exports"; |
| private static final String ADD_OPENS = "--add-opens"; |
| private static final String ADD_READS = "--add-reads"; |
| private static final String PATCH_MODULE = "--patch-module"; |
| |
| |
| /* |
| * Returns the command-line option name corresponds to the specified |
| * system property prefix. |
| */ |
| static String option(String prefix) { |
| switch (prefix) { |
| case "jdk.module.addexports.": |
| return ADD_EXPORTS; |
| case "jdk.module.addopens.": |
| return ADD_OPENS; |
| case "jdk.module.addreads.": |
| return ADD_READS; |
| case "jdk.module.patch.": |
| return PATCH_MODULE; |
| case "jdk.module.addmods.": |
| return ADD_MODULES; |
| default: |
| throw new IllegalArgumentException(prefix); |
| } |
| } |
| |
| /** |
| * Returns an iterator that yields all elements of the first iterator |
| * followed by all the elements of the second iterator. |
| */ |
| static <T> Iterator<T> concat(Iterator<T> iterator1, Iterator<T> iterator2) { |
| return new Iterator<T>() { |
| @Override |
| public boolean hasNext() { |
| return iterator1.hasNext() || iterator2.hasNext(); |
| } |
| @Override |
| public T next() { |
| if (iterator1.hasNext()) return iterator1.next(); |
| if (iterator2.hasNext()) return iterator2.next(); |
| throw new NoSuchElementException(); |
| } |
| }; |
| } |
| |
| /** |
| * Wraps a (potentially not thread safe) ModuleFinder created during startup |
| * for use after startup. |
| */ |
| static class SafeModuleFinder implements ModuleFinder { |
| private final Set<ModuleReference> mrefs; |
| private volatile Map<String, ModuleReference> nameToModule; |
| |
| SafeModuleFinder(ModuleFinder finder) { |
| this.mrefs = Collections.unmodifiableSet(finder.findAll()); |
| } |
| @Override |
| public Optional<ModuleReference> find(String name) { |
| Objects.requireNonNull(name); |
| Map<String, ModuleReference> nameToModule = this.nameToModule; |
| if (nameToModule == null) { |
| this.nameToModule = nameToModule = mrefs.stream() |
| .collect(Collectors.toMap(m -> m.descriptor().name(), |
| Function.identity())); |
| } |
| return Optional.ofNullable(nameToModule.get(name)); |
| } |
| @Override |
| public Set<ModuleReference> findAll() { |
| return mrefs; |
| } |
| } |
| |
| /** |
| * Counters for startup performance analysis. |
| */ |
| static class Counters { |
| private static final boolean PUBLISH_COUNTERS; |
| private static final boolean PRINT_COUNTERS; |
| private static Map<String, Long> counters; |
| static { |
| String s = System.getProperty("jdk.module.boot.usePerfData"); |
| if (s == null) { |
| PUBLISH_COUNTERS = false; |
| PRINT_COUNTERS = false; |
| } else { |
| PUBLISH_COUNTERS = true; |
| PRINT_COUNTERS = s.equals("debug"); |
| counters = new LinkedHashMap<>(); // preserve insert order |
| } |
| } |
| |
| /** |
| * Add a counter |
| */ |
| static void add(String name, long start) { |
| if (PUBLISH_COUNTERS || PRINT_COUNTERS) { |
| counters.put(name, (System.nanoTime() - start)); |
| } |
| } |
| |
| /** |
| * Publish the counters to the instrumentation buffer or stdout. |
| */ |
| static void publish() { |
| if (PUBLISH_COUNTERS || PRINT_COUNTERS) { |
| for (Map.Entry<String, Long> e : counters.entrySet()) { |
| String name = e.getKey(); |
| long value = e.getValue(); |
| if (PUBLISH_COUNTERS) |
| PerfCounter.newPerfCounter(name).set(value); |
| if (PRINT_COUNTERS) |
| System.out.println(name + " = " + value); |
| } |
| } |
| } |
| } |
| } |
