| /* |
| * Copyright (c) 2016, 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. |
| * |
| * 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. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "classfile/classFileParser.hpp" |
| #include "classfile/classLoader.hpp" |
| #include "classfile/classLoaderData.inline.hpp" |
| #include "classfile/javaAssertions.hpp" |
| #include "classfile/javaClasses.hpp" |
| #include "classfile/javaClasses.inline.hpp" |
| #include "classfile/moduleEntry.hpp" |
| #include "classfile/modules.hpp" |
| #include "classfile/packageEntry.hpp" |
| #include "classfile/stringTable.hpp" |
| #include "classfile/symbolTable.hpp" |
| #include "classfile/vmSymbols.hpp" |
| #include "logging/log.hpp" |
| #include "oops/instanceKlass.hpp" |
| #include "oops/objArrayKlass.hpp" |
| #include "oops/objArrayOop.inline.hpp" |
| #include "runtime/arguments.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "runtime/javaCalls.hpp" |
| #include "runtime/reflection.hpp" |
| #include "utilities/utf8.hpp" |
| |
| static bool verify_module_name(char *module_name) { |
| if (module_name == NULL) return false; |
| int len = (int)strlen(module_name); |
| return (len > 0 && len <= Symbol::max_length() && |
| UTF8::is_legal_utf8((unsigned char *)module_name, len, false) && |
| ClassFileParser::verify_unqualified_name(module_name, len, |
| ClassFileParser::LegalModule)); |
| } |
| |
| bool Modules::verify_package_name(char *package_name) { |
| if (package_name == NULL) return false; |
| int len = (int)strlen(package_name); |
| return (len > 0 && len <= Symbol::max_length() && |
| UTF8::is_legal_utf8((unsigned char *)package_name, len, false) && |
| ClassFileParser::verify_unqualified_name(package_name, len, |
| ClassFileParser::LegalClass)); |
| } |
| |
| static char* get_module_name(oop module, TRAPS) { |
| oop name_oop = java_lang_reflect_Module::name(module); |
| if (name_oop == NULL) { |
| THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), "Null module name"); |
| } |
| char* module_name = java_lang_String::as_utf8_string(name_oop); |
| if (!verify_module_name(module_name)) { |
| THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Invalid module name: %s", |
| module_name != NULL ? module_name : "NULL")); |
| } |
| return module_name; |
| } |
| |
| static const char* get_module_version(jstring version) { |
| if (version == NULL) { |
| return NULL; |
| } |
| return java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(version)); |
| } |
| |
| static ModuleEntryTable* get_module_entry_table(Handle h_loader, TRAPS) { |
| // This code can be called during start-up, before the classLoader's classLoader data got |
| // created. So, call register_loader() to make sure the classLoader data gets created. |
| ClassLoaderData *loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); |
| return loader_cld->modules(); |
| } |
| |
| static PackageEntryTable* get_package_entry_table(Handle h_loader, TRAPS) { |
| // This code can be called during start-up, before the classLoader's classLoader data got |
| // created. So, call register_loader() to make sure the classLoader data gets created. |
| ClassLoaderData *loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); |
| return loader_cld->packages(); |
| } |
| |
| static ModuleEntry* get_module_entry(jobject module, TRAPS) { |
| Handle module_h(THREAD, JNIHandles::resolve(module)); |
| if (!java_lang_reflect_Module::is_instance(module_h())) { |
| THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Bad module object"); |
| } |
| return java_lang_reflect_Module::module_entry(module_h(), CHECK_NULL); |
| } |
| |
| static PackageEntry* get_package_entry(ModuleEntry* module_entry, jstring package, TRAPS) { |
| ResourceMark rm(THREAD); |
| if (package == NULL) return NULL; |
| const char *package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package)); |
| if (package_name == NULL) return NULL; |
| TempNewSymbol pkg_symbol = SymbolTable::new_symbol(package_name, CHECK_NULL); |
| PackageEntryTable* package_entry_table = module_entry->loader()->packages(); |
| assert(package_entry_table != NULL, "Unexpected null package entry table"); |
| return package_entry_table->lookup_only(pkg_symbol); |
| } |
| |
| static PackageEntry* get_package_entry_by_name(Symbol* package, |
| Handle h_loader, |
| TRAPS) { |
| if (package != NULL) { |
| ResourceMark rm(THREAD); |
| if (Modules::verify_package_name(package->as_C_string())) { |
| PackageEntryTable* const package_entry_table = |
| get_package_entry_table(h_loader, CHECK_NULL); |
| assert(package_entry_table != NULL, "Unexpected null package entry table"); |
| return package_entry_table->lookup_only(package); |
| } |
| } |
| return NULL; |
| } |
| |
| // Check if -Xpatch:<dirs> was specified. If so, prepend each <dir>/module_name, |
| // if it exists, to bootpath so boot loader can find the class files. Also, if |
| // using exploded modules, append <java.home>/modules/module_name, if it exists, |
| // to bootpath so that its class files can be found by the boot loader. |
| static void add_to_boot_loader_list(char *module_name, TRAPS) { |
| // java.base should be handled by argument parsing. |
| assert(strcmp(module_name, "java.base") != 0, "Unexpected java.base module name"); |
| char file_sep = os::file_separator()[0]; |
| size_t module_len = strlen(module_name); |
| |
| // If -Xpatch is set then add <patch-dir>/module_name paths. |
| char** patch_dirs = Arguments::patch_dirs(); |
| if (patch_dirs != NULL) { |
| int dir_count = Arguments::patch_dirs_count(); |
| for (int x = 0; x < dir_count; x++) { |
| // Really shouldn't be NULL, but check can't hurt |
| if (patch_dirs[x] != NULL) { |
| size_t len = strlen(patch_dirs[x]); |
| if (len != 0) { // Ignore empty strings. |
| len = len + module_len + 2; |
| char* prefix_path = NEW_C_HEAP_ARRAY(char, len, mtInternal); |
| jio_snprintf(prefix_path, len, "%s%c%s", patch_dirs[x], file_sep, module_name); |
| |
| // See if Xpatch module path exists. |
| struct stat st; |
| if ((os::stat(prefix_path, &st) != 0)) { |
| FREE_C_HEAP_ARRAY(char, prefix_path); |
| } else { |
| { |
| HandleMark hm; |
| Handle loader_lock = Handle(THREAD, SystemDictionary::system_loader_lock()); |
| ObjectLocker ol(loader_lock, THREAD); |
| ClassLoader::prepend_to_list(prefix_path); |
| } |
| log_info(classload)("opened: -Xpatch %s", prefix_path); |
| } |
| } |
| } |
| } |
| } |
| |
| // If "modules" jimage does not exist then assume exploded form |
| // ${java.home}/modules/<module-name> |
| char* path = NULL; |
| if (!ClassLoader::has_jimage()) { |
| const char* home = Arguments::get_java_home(); |
| size_t len = strlen(home) + module_len + 32; |
| path = NEW_C_HEAP_ARRAY(char, len, mtInternal); |
| jio_snprintf(path, len, "%s%cmodules%c%s", home, file_sep, file_sep, module_name); |
| struct stat st; |
| // See if exploded module path exists. |
| if ((os::stat(path, &st) != 0)) { |
| FREE_C_HEAP_ARRAY(char, path); |
| path = NULL; |
| } |
| } |
| |
| if (path != NULL) { |
| HandleMark hm; |
| Handle loader_lock = Handle(THREAD, SystemDictionary::system_loader_lock()); |
| ObjectLocker ol(loader_lock, THREAD); |
| |
| log_info(classload)("opened: %s", path); |
| ClassLoader::add_to_list(path); |
| } |
| } |
| |
| bool Modules::is_package_defined(Symbol* package, Handle h_loader, TRAPS) { |
| PackageEntry* res = get_package_entry_by_name(package, h_loader, CHECK_false); |
| return res != NULL; |
| } |
| |
| static void define_javabase_module(jobject module, jstring version, |
| jstring location, jobjectArray packages, TRAPS) { |
| ResourceMark rm(THREAD); |
| |
| Handle module_handle(THREAD, JNIHandles::resolve(module)); |
| |
| // Obtain java.base's module version |
| const char* module_version = get_module_version(version); |
| TempNewSymbol version_symbol; |
| if (module_version != NULL) { |
| version_symbol = SymbolTable::new_symbol(module_version, CHECK); |
| } else { |
| version_symbol = NULL; |
| } |
| |
| // Obtain java.base's location |
| const char* module_location = NULL; |
| TempNewSymbol location_symbol = NULL; |
| if (location != NULL) { |
| module_location = |
| java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(location)); |
| if (module_location != NULL) { |
| location_symbol = SymbolTable::new_symbol(module_location, CHECK); |
| } |
| } |
| |
| objArrayOop packages_oop = objArrayOop(JNIHandles::resolve(packages)); |
| objArrayHandle packages_h(THREAD, packages_oop); |
| int num_packages = (packages_h == NULL ? 0 : packages_h->length()); |
| |
| // Check that the list of packages has no duplicates and that the |
| // packages are syntactically ok. |
| GrowableArray<Symbol*>* pkg_list = new GrowableArray<Symbol*>(num_packages); |
| for (int x = 0; x < num_packages; x++) { |
| oop string_obj = packages_h->obj_at(x); |
| |
| if (string_obj == NULL || !string_obj->is_a(SystemDictionary::String_klass())) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "Bad package name for module: java.base"); |
| } |
| char *package_name = java_lang_String::as_utf8_string(string_obj); |
| if (!Modules::verify_package_name(package_name)) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Invalid package name: %s for module: java.base", package_name)); |
| } |
| Symbol* pkg_symbol = SymbolTable::new_symbol(package_name, CHECK); |
| // append_if_missing() returns FALSE if entry already exists. |
| if (!pkg_list->append_if_missing(pkg_symbol)) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Duplicate package name: %s for module java.base", |
| package_name)); |
| } |
| } |
| |
| // Validate java_base's loader is the boot loader. |
| oop loader = java_lang_reflect_Module::loader(module_handle()); |
| if (loader != NULL) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "Class loader must be the boot class loader"); |
| } |
| Handle h_loader = Handle(THREAD, loader); |
| |
| // Ensure the boot loader's PackageEntryTable has been created |
| PackageEntryTable* package_table = get_package_entry_table(h_loader, CHECK); |
| assert(pkg_list->length() == 0 || package_table != NULL, "Bad package_table"); |
| |
| // Ensure java.base's ModuleEntry has been created |
| assert(ModuleEntryTable::javabase_module() != NULL, "No ModuleEntry for java.base"); |
| |
| { |
| MutexLocker m1(Module_lock, THREAD); |
| |
| // Verify that all java.base packages created during bootstrapping are in |
| // pkg_list. If any are not in pkg_list, than a non-java.base class was |
| // loaded erroneously pre java.base module definition. |
| package_table->verify_javabase_packages(pkg_list); |
| |
| // loop through and add any new packages for java.base |
| PackageEntry* pkg; |
| for (int x = 0; x < pkg_list->length(); x++) { |
| // Some of java.base's packages were added early in bootstrapping, ignore duplicates. |
| if (package_table->lookup_only(pkg_list->at(x)) == NULL) { |
| pkg = package_table->locked_create_entry_or_null(pkg_list->at(x), ModuleEntryTable::javabase_module()); |
| assert(pkg != NULL, "Unable to create a java.base package entry"); |
| } |
| // Unable to have a GrowableArray of TempNewSymbol. Must decrement the refcount of |
| // the Symbol* that was created above for each package. The refcount was incremented |
| // by SymbolTable::new_symbol and as well by the PackageEntry creation. |
| pkg_list->at(x)->decrement_refcount(); |
| } |
| |
| // Finish defining java.base's ModuleEntry |
| ModuleEntryTable::finalize_javabase(module_handle, version_symbol, location_symbol); |
| } |
| |
| log_debug(modules)("define_javabase_module(): Definition of module: java.base," |
| " version: %s, location: %s, package #: %d", |
| module_version != NULL ? module_version : "NULL", |
| module_location != NULL ? module_location : "NULL", |
| pkg_list->length()); |
| |
| // packages defined to java.base |
| for (int x = 0; x < pkg_list->length(); x++) { |
| log_trace(modules)("define_javabase_module(): creation of package %s for module java.base", |
| (pkg_list->at(x))->as_C_string()); |
| } |
| |
| // Patch any previously loaded classes' module field with java.base's jlr.Module. |
| ModuleEntryTable::patch_javabase_entries(module_handle); |
| } |
| |
| void Modules::define_module(jobject module, jstring version, |
| jstring location, jobjectArray packages, TRAPS) { |
| ResourceMark rm(THREAD); |
| |
| if (module == NULL) { |
| THROW_MSG(vmSymbols::java_lang_NullPointerException(), "Null module object"); |
| } |
| Handle module_handle(THREAD, JNIHandles::resolve(module)); |
| if (!java_lang_reflect_Module::is_subclass(module_handle->klass())) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "module is not a subclass of java.lang.reflect.Module"); |
| } |
| |
| char* module_name = get_module_name(module_handle(), CHECK); |
| if (module_name == NULL) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "Module name cannot be null"); |
| } |
| |
| // Special handling of java.base definition |
| if (strcmp(module_name, "java.base") == 0) { |
| define_javabase_module(module, version, location, packages, CHECK); |
| return; |
| } |
| |
| const char* module_version = get_module_version(version); |
| |
| objArrayOop packages_oop = objArrayOop(JNIHandles::resolve(packages)); |
| objArrayHandle packages_h(THREAD, packages_oop); |
| int num_packages = (packages_h == NULL ? 0 : packages_h->length()); |
| |
| // Check that the list of packages has no duplicates and that the |
| // packages are syntactically ok. |
| GrowableArray<Symbol*>* pkg_list = new GrowableArray<Symbol*>(num_packages); |
| for (int x = 0; x < num_packages; x++) { |
| oop string_obj = packages_h->obj_at(x); |
| |
| if (string_obj == NULL || !string_obj->is_a(SystemDictionary::String_klass())) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Bad package name for module: %s", module_name)); |
| } |
| char *package_name = java_lang_String::as_utf8_string(string_obj); |
| if (!verify_package_name(package_name)) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Invalid package name: %s for module: %s", |
| package_name, module_name)); |
| } |
| Symbol* pkg_symbol = SymbolTable::new_symbol(package_name, CHECK); |
| // append_if_missing() returns FALSE if entry already exists. |
| if (!pkg_list->append_if_missing(pkg_symbol)) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Duplicate package name: %s for module %s", |
| package_name, module_name)); |
| } |
| } |
| |
| oop loader = java_lang_reflect_Module::loader(module_handle()); |
| // Make sure loader is not the sun.reflect.DelegatingClassLoader. |
| if (loader != java_lang_ClassLoader::non_reflection_class_loader(loader)) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "Class loader is an invalid delegating class loader"); |
| } |
| Handle h_loader = Handle(THREAD, loader); |
| |
| // Check that loader is a subclass of java.lang.ClassLoader. |
| if (loader != NULL && !java_lang_ClassLoader::is_subclass(h_loader->klass())) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "Class loader is not a subclass of java.lang.ClassLoader"); |
| } |
| |
| ModuleEntryTable* module_table = get_module_entry_table(h_loader, CHECK); |
| assert(module_table != NULL, "module entry table shouldn't be null"); |
| |
| // Create symbol* entry for module name. |
| TempNewSymbol module_symbol = SymbolTable::new_symbol(module_name, CHECK); |
| |
| int dupl_pkg_index = -1; |
| bool dupl_modules = false; |
| |
| // Create symbol* entry for module version. |
| TempNewSymbol version_symbol; |
| if (module_version != NULL) { |
| version_symbol = SymbolTable::new_symbol(module_version, CHECK); |
| } else { |
| version_symbol = NULL; |
| } |
| |
| // Create symbol* entry for module location. |
| const char* module_location = NULL; |
| TempNewSymbol location_symbol = NULL; |
| if (location != NULL) { |
| module_location = |
| java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(location)); |
| if (module_location != NULL) { |
| location_symbol = SymbolTable::new_symbol(module_location, CHECK); |
| } |
| } |
| |
| ClassLoaderData* loader_data = ClassLoaderData::class_loader_data_or_null(h_loader()); |
| assert(loader_data != NULL, "class loader data shouldn't be null"); |
| |
| PackageEntryTable* package_table = NULL; |
| { |
| MutexLocker ml(Module_lock, THREAD); |
| |
| if (num_packages > 0) { |
| package_table = get_package_entry_table(h_loader, CHECK); |
| assert(package_table != NULL, "Missing package_table"); |
| |
| // Check that none of the packages exist in the class loader's package table. |
| for (int x = 0; x < pkg_list->length(); x++) { |
| if (package_table->lookup_only(pkg_list->at(x)) != NULL) { |
| // This could be because the module was already defined. If so, |
| // report that error instead of the package error. |
| if (module_table->lookup_only(module_symbol) != NULL) { |
| dupl_modules = true; |
| } else { |
| dupl_pkg_index = x; |
| } |
| break; |
| } |
| } |
| } // if (num_packages > 0)... |
| |
| // Add the module and its packages. |
| if (!dupl_modules && dupl_pkg_index == -1) { |
| // Create the entry for this module in the class loader's module entry table. |
| |
| ModuleEntry* module_entry = module_table->locked_create_entry_or_null(module_handle, module_symbol, |
| version_symbol, location_symbol, loader_data); |
| |
| if (module_entry == NULL) { |
| dupl_modules = true; |
| } else { |
| // Add the packages. |
| assert(pkg_list->length() == 0 || package_table != NULL, "Bad package table"); |
| PackageEntry* pkg; |
| for (int y = 0; y < pkg_list->length(); y++) { |
| pkg = package_table->locked_create_entry_or_null(pkg_list->at(y), module_entry); |
| assert(pkg != NULL, "Unable to create a module's package entry"); |
| |
| // Unable to have a GrowableArray of TempNewSymbol. Must decrement the refcount of |
| // the Symbol* that was created above for each package. The refcount was incremented |
| // by SymbolTable::new_symbol and as well by the PackageEntry creation. |
| pkg_list->at(y)->decrement_refcount(); |
| } |
| |
| // Store pointer to ModuleEntry record in java.lang.reflect.Module object. |
| java_lang_reflect_Module::set_module_entry(module_handle(), module_entry); |
| } |
| } |
| } // Release the lock |
| |
| // any errors ? |
| if (dupl_modules) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Module %s is already defined", module_name)); |
| } |
| if (dupl_pkg_index != -1) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Package %s for module %s already exists for class loader", |
| pkg_list->at(dupl_pkg_index)->as_C_string(), module_name)); |
| } |
| |
| if (log_is_enabled(Debug, modules)) { |
| outputStream* logst = LogHandle(modules)::debug_stream(); |
| logst->print("define_module(): creation of module: %s, version: %s, location: %s, ", |
| module_name, module_version != NULL ? module_version : "NULL", |
| module_location != NULL ? module_location : "NULL"); |
| loader_data->print_value_on(logst); |
| logst->print_cr(", package #: %d", pkg_list->length()); |
| for (int y = 0; y < pkg_list->length(); y++) { |
| log_trace(modules)("define_module(): creation of package %s for module %s", |
| (pkg_list->at(y))->as_C_string(), module_name); |
| } |
| } |
| |
| if (loader == NULL && !Universe::is_module_initialized()) { |
| // Now that the module is defined, if it is in the bootloader, make sure that |
| // its classes can be found. Check if -Xpatch:<path> was specified. If |
| // so prepend <path>/module_name, if it exists, to bootpath. Also, if using |
| // exploded modules, prepend <java.home>/modules/module_name, if it exists, |
| // to bootpath. |
| add_to_boot_loader_list(module_name, CHECK); |
| } |
| } |
| |
| void Modules::set_bootloader_unnamed_module(jobject module, TRAPS) { |
| ResourceMark rm(THREAD); |
| |
| if (module == NULL) { |
| THROW_MSG(vmSymbols::java_lang_NullPointerException(), "Null module object"); |
| } |
| Handle module_handle(THREAD, JNIHandles::resolve(module)); |
| if (!java_lang_reflect_Module::is_subclass(module_handle->klass())) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "module is not a subclass of java.lang.reflect.Module"); |
| } |
| |
| // Ensure that this is an unnamed module |
| oop name = java_lang_reflect_Module::name(module_handle()); |
| if (name != NULL) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "boot loader's unnamed module's java.lang.reflect.Module has a name"); |
| } |
| |
| // Validate java_base's loader is the boot loader. |
| oop loader = java_lang_reflect_Module::loader(module_handle()); |
| if (loader != NULL) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "Class loader must be the boot class loader"); |
| } |
| Handle h_loader = Handle(THREAD, loader); |
| |
| log_debug(modules)("set_bootloader_unnamed_module(): recording unnamed module for boot loader"); |
| |
| // Ensure the boot loader's PackageEntryTable has been created |
| ModuleEntryTable* module_table = get_module_entry_table(h_loader, CHECK); |
| |
| // Set java.lang.reflect.Module for the boot loader's unnamed module |
| ModuleEntry* unnamed_module = module_table->unnamed_module(); |
| assert(unnamed_module != NULL, "boot loader's unnamed ModuleEntry not defined"); |
| unnamed_module->set_module(ClassLoaderData::the_null_class_loader_data()->add_handle(module_handle)); |
| // Store pointer to the ModuleEntry in the unnamed module's java.lang.reflect.Module object. |
| java_lang_reflect_Module::set_module_entry(module_handle(), unnamed_module); |
| } |
| |
| void Modules::add_module_exports(jobject from_module, jstring package, jobject to_module, TRAPS) { |
| if (package == NULL) { |
| THROW_MSG(vmSymbols::java_lang_NullPointerException(), |
| "package is null"); |
| } |
| if (from_module == NULL) { |
| THROW_MSG(vmSymbols::java_lang_NullPointerException(), |
| "from_module is null"); |
| } |
| ModuleEntry* from_module_entry = get_module_entry(from_module, CHECK); |
| if (from_module_entry == NULL) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "from_module cannot be found"); |
| } |
| |
| // All packages in unnamed are exported by default. |
| if (!from_module_entry->is_named()) return; |
| |
| ModuleEntry* to_module_entry; |
| if (to_module == NULL) { |
| to_module_entry = NULL; // It's an unqualified export. |
| } else { |
| to_module_entry = get_module_entry(to_module, CHECK); |
| if (to_module_entry == NULL) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "to_module is invalid"); |
| } |
| } |
| |
| PackageEntry *package_entry = get_package_entry(from_module_entry, package, CHECK); |
| ResourceMark rm(THREAD); |
| if (package_entry == NULL) { |
| const char *package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package)); |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Package %s not found in from_module %s", |
| package_name != NULL ? package_name : "", |
| from_module_entry->name()->as_C_string())); |
| } |
| if (package_entry->module() != from_module_entry) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Package: %s found in module %s, not in from_module: %s", |
| package_entry->name()->as_C_string(), |
| package_entry->module()->name()->as_C_string(), |
| from_module_entry->name()->as_C_string())); |
| } |
| |
| log_debug(modules)("add_module_exports(): package %s in module %s is exported to module %s", |
| package_entry->name()->as_C_string(), |
| from_module_entry->name()->as_C_string(), |
| to_module_entry == NULL ? "NULL" : |
| to_module_entry->is_named() ? |
| to_module_entry->name()->as_C_string() : UNNAMED_MODULE); |
| |
| // Do nothing if modules are the same or if package is already exported unqualifiedly. |
| if (from_module_entry != to_module_entry && !package_entry->is_unqual_exported()) { |
| package_entry->set_exported(to_module_entry); |
| } |
| } |
| |
| |
| void Modules::add_module_exports_qualified(jobject from_module, jstring package, |
| jobject to_module, TRAPS) { |
| if (to_module == NULL) { |
| THROW_MSG(vmSymbols::java_lang_NullPointerException(), |
| "to_module is null"); |
| } |
| add_module_exports(from_module, package, to_module, CHECK); |
| } |
| |
| void Modules::add_reads_module(jobject from_module, jobject to_module, TRAPS) { |
| if (from_module == NULL) { |
| THROW_MSG(vmSymbols::java_lang_NullPointerException(), |
| "from_module is null"); |
| } |
| |
| ModuleEntry* from_module_entry = get_module_entry(from_module, CHECK); |
| if (from_module_entry == NULL) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "from_module is not valid"); |
| } |
| |
| ModuleEntry* to_module_entry; |
| if (to_module != NULL) { |
| to_module_entry = get_module_entry(to_module, CHECK); |
| if (to_module_entry == NULL) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "to_module is invalid"); |
| } |
| } else { |
| to_module_entry = NULL; |
| } |
| |
| ResourceMark rm(THREAD); |
| log_debug(modules)("add_reads_module(): Adding read from module %s to module %s", |
| from_module_entry->is_named() ? |
| from_module_entry->name()->as_C_string() : UNNAMED_MODULE, |
| to_module_entry == NULL ? "all unnamed" : |
| (to_module_entry->is_named() ? |
| to_module_entry->name()->as_C_string() : UNNAMED_MODULE)); |
| |
| // if modules are the same or if from_module is unnamed then no need to add the read. |
| if (from_module_entry != to_module_entry && from_module_entry->is_named()) { |
| from_module_entry->add_read(to_module_entry); |
| } |
| } |
| |
| jboolean Modules::can_read_module(jobject asking_module, jobject target_module, TRAPS) { |
| if (asking_module == NULL) { |
| THROW_MSG_(vmSymbols::java_lang_NullPointerException(), |
| "asking_module is null", JNI_FALSE); |
| } |
| |
| ModuleEntry* asking_module_entry = get_module_entry(asking_module, CHECK_false); |
| if (asking_module_entry == NULL) { |
| THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| "asking_module is invalid", JNI_FALSE); |
| } |
| |
| // Calling can_read_all_unnamed() with NULL tests if a module is loose. |
| if (target_module == NULL) { |
| return asking_module_entry->can_read_all_unnamed(); |
| } |
| |
| ModuleEntry* target_module_entry = get_module_entry(target_module, CHECK_false); |
| if (target_module_entry == NULL) { |
| THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| "target_module is invalid", JNI_FALSE); |
| } |
| |
| ResourceMark rm(THREAD); |
| log_debug(modules)("can_read_module(): module %s trying to read module %s, allowed = %s", |
| asking_module_entry->is_named() ? |
| asking_module_entry->name()->as_C_string() : UNNAMED_MODULE, |
| target_module_entry->is_named() ? |
| target_module_entry->name()->as_C_string() : UNNAMED_MODULE, |
| BOOL_TO_STR(asking_module_entry == target_module_entry || |
| (asking_module_entry->can_read_all_unnamed() && |
| !target_module_entry->is_named()) || |
| asking_module_entry->can_read(target_module_entry))); |
| |
| // Return true if: |
| // 1. the modules are the same, or |
| // 2. the asking_module is unnamed (because unnamed modules read everybody), or |
| // 3. the asking_module is loose and the target module is unnamed, or |
| // 4. if can_read() returns true. |
| if (asking_module_entry == target_module_entry || |
| (asking_module_entry->can_read_all_unnamed() && !target_module_entry->is_named())) { |
| return true; |
| } |
| return asking_module_entry->can_read(target_module_entry); |
| } |
| |
| jboolean Modules::is_exported_to_module(jobject from_module, jstring package, |
| jobject to_module, TRAPS) { |
| if (package == NULL) { |
| THROW_MSG_(vmSymbols::java_lang_NullPointerException(), |
| "package is null", JNI_FALSE); |
| } |
| if (from_module == NULL) { |
| THROW_MSG_(vmSymbols::java_lang_NullPointerException(), |
| "from_module is null", JNI_FALSE); |
| } |
| ModuleEntry* from_module_entry = get_module_entry(from_module, CHECK_false); |
| if (from_module_entry == NULL) { |
| THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| "from_module is invalid", JNI_FALSE); |
| } |
| ModuleEntry* to_module_entry; |
| if (to_module == NULL) { |
| THROW_MSG_(vmSymbols::java_lang_NullPointerException(), |
| "to_module is null", JNI_FALSE); |
| } |
| to_module_entry = get_module_entry(to_module, CHECK_false); |
| if (to_module_entry == NULL) { |
| THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| "to_module is invalid", JNI_FALSE); |
| } |
| |
| PackageEntry *package_entry = get_package_entry(from_module_entry, package, |
| CHECK_false); |
| ResourceMark rm(THREAD); |
| if (package_entry == NULL) { |
| THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Package not found in from_module: %s", |
| from_module_entry->is_named() ? |
| from_module_entry->name()->as_C_string() : UNNAMED_MODULE), |
| JNI_FALSE); |
| } |
| if (package_entry->module() != from_module_entry) { |
| THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Package: %s found in module %s, not in from_module: %s", |
| package_entry->name()->as_C_string(), |
| package_entry->module()->is_named() ? |
| package_entry->module()->name()->as_C_string() : UNNAMED_MODULE, |
| from_module_entry->is_named() ? |
| from_module_entry->name()->as_C_string() : UNNAMED_MODULE), |
| JNI_FALSE); |
| } |
| |
| log_debug(modules)("is_exported_to_module: package %s from module %s checking" |
| " if exported to module %s, exported? = %s", |
| package_entry->name()->as_C_string(), |
| from_module_entry->is_named() ? |
| from_module_entry->name()->as_C_string() : UNNAMED_MODULE, |
| to_module_entry->is_named() ? |
| to_module_entry->name()->as_C_string() : UNNAMED_MODULE, |
| BOOL_TO_STR(!from_module_entry->is_named() || |
| package_entry->is_unqual_exported() || |
| from_module_entry == to_module_entry || |
| package_entry->is_qexported_to(to_module_entry))); |
| |
| // Return true if: |
| // 1. from_module is unnamed because unnamed modules export all their packages (by default), or |
| // 2. if the package is unqualifiedly exported, or |
| // 3. if the modules are the same, or |
| // 4. if the package is exported to to_module |
| return (!from_module_entry->is_named() || |
| package_entry->is_unqual_exported() || |
| from_module_entry == to_module_entry || |
| package_entry->is_qexported_to(to_module_entry)); |
| } |
| |
| // This method is called by JFR and JNI. |
| jobject Modules::get_module(jclass clazz, TRAPS) { |
| assert(ModuleEntryTable::javabase_defined(), "Attempt to call get_module before java.base is defined"); |
| |
| if (clazz == NULL) { |
| THROW_MSG_(vmSymbols::java_lang_NullPointerException(), |
| "class is null", JNI_FALSE); |
| } |
| oop mirror = JNIHandles::resolve_non_null(clazz); |
| if (mirror == NULL) { |
| log_debug(modules)("get_module(): no mirror, returning NULL"); |
| return NULL; |
| } |
| if (!java_lang_Class::is_instance(mirror)) { |
| THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| "Invalid class", JNI_FALSE); |
| } |
| |
| oop module = java_lang_Class::module(mirror); |
| |
| assert(module != NULL, "java.lang.Class module field not set"); |
| assert(java_lang_reflect_Module::is_subclass(module->klass()), "Module is not a java.lang.reflect.Module"); |
| |
| if (log_is_enabled(Debug, modules)) { |
| ResourceMark rm(THREAD); |
| outputStream* logst = LogHandle(modules)::debug_stream(); |
| Klass* klass = java_lang_Class::as_Klass(mirror); |
| oop module_name = java_lang_reflect_Module::name(module); |
| if (module_name != NULL) { |
| logst->print("get_module(): module "); |
| java_lang_String::print(module_name, tty); |
| } else { |
| logst->print("get_module(): Unamed Module"); |
| } |
| if (klass != NULL) { |
| logst->print_cr(" for class %s", klass->external_name()); |
| } else { |
| logst->print_cr(" for primitive class"); |
| } |
| } |
| |
| return JNIHandles::make_local(THREAD, module); |
| } |
| |
| |
| jobject Modules::get_module_by_package_name(jobject loader, jstring package, TRAPS) { |
| ResourceMark rm(THREAD); |
| assert(ModuleEntryTable::javabase_defined(), |
| "Attempt to call get_module_from_pkg before java.base is defined"); |
| |
| if (NULL == package) { |
| THROW_MSG_(vmSymbols::java_lang_NullPointerException(), |
| "package is null", JNI_FALSE); |
| } |
| const char* package_str = |
| java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package)); |
| if (NULL == package_str) { |
| THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| "Invalid package", JNI_FALSE); |
| } |
| |
| Handle h_loader (THREAD, JNIHandles::resolve(loader)); |
| // Check that loader is a subclass of java.lang.ClassLoader. |
| if (loader != NULL && !java_lang_ClassLoader::is_subclass(h_loader->klass())) { |
| THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| "Class loader is not a subclass of java.lang.ClassLoader", JNI_FALSE); |
| } |
| |
| if (strlen(package_str) == 0) { |
| // Return the unnamed module |
| ModuleEntryTable* module_table = get_module_entry_table(h_loader, CHECK_NULL); |
| if (NULL == module_table) return NULL; |
| const ModuleEntry* const unnamed_module = module_table->unnamed_module(); |
| return JNIHandles::make_local(THREAD, JNIHandles::resolve(unnamed_module->module())); |
| |
| } else { |
| TempNewSymbol package_sym = SymbolTable::new_symbol(package_str, CHECK_NULL); |
| return get_module(package_sym, h_loader, CHECK_NULL); |
| } |
| return NULL; |
| } |
| |
| |
| // This method is called by JFR and by the above method. |
| jobject Modules::get_module(Symbol* package_name, Handle h_loader, TRAPS) { |
| const PackageEntry* const pkg_entry = |
| get_package_entry_by_name(package_name, h_loader, THREAD); |
| const ModuleEntry* const module_entry = (pkg_entry != NULL ? pkg_entry->module() : NULL); |
| |
| if (module_entry != NULL && |
| module_entry->module() != NULL) { |
| return JNIHandles::make_local(THREAD, JNIHandles::resolve(module_entry->module())); |
| } |
| |
| return NULL; |
| } |
| |
| void Modules::add_module_package(jobject module, jstring package, TRAPS) { |
| ResourceMark rm(THREAD); |
| |
| if (module == NULL) { |
| THROW_MSG(vmSymbols::java_lang_NullPointerException(), |
| "module is null"); |
| } |
| if (package == NULL) { |
| THROW_MSG(vmSymbols::java_lang_NullPointerException(), |
| "package is null"); |
| } |
| ModuleEntry* module_entry = get_module_entry(module, CHECK); |
| if (module_entry == NULL) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "module is invalid"); |
| } |
| if (!module_entry->is_named()) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "module cannot be an unnamed module"); |
| } |
| char *package_name = java_lang_String::as_utf8_string( |
| JNIHandles::resolve_non_null(package)); |
| if (package_name == NULL) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad package"); |
| } |
| if (!verify_package_name(package_name)) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Invalid package name: %s", package_name)); |
| } |
| |
| log_debug(modules)("add_module_package(): Adding package %s to module %s", |
| package_name, module_entry->name()->as_C_string()); |
| |
| TempNewSymbol pkg_symbol = SymbolTable::new_symbol(package_name, CHECK); |
| PackageEntryTable* package_table = module_entry->loader()->packages(); |
| assert(package_table != NULL, "Missing package_table"); |
| |
| bool pkg_exists = false; |
| { |
| MutexLocker ml(Module_lock, THREAD); |
| |
| // Check that the package does not exist in the class loader's package table. |
| if (!package_table->lookup_only(pkg_symbol)) { |
| PackageEntry* pkg = package_table->locked_create_entry_or_null(pkg_symbol, module_entry); |
| assert(pkg != NULL, "Unable to create a module's package entry"); |
| } else { |
| pkg_exists = true; |
| } |
| } |
| if (pkg_exists) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Package %s already exists for class loader", package_name)); |
| } |
| } |
| |
| // Export package in module to all unnamed modules. |
| void Modules::add_module_exports_to_all_unnamed(jobject module, jstring package, TRAPS) { |
| if (module == NULL) { |
| THROW_MSG(vmSymbols::java_lang_NullPointerException(), |
| "module is null"); |
| } |
| if (package == NULL) { |
| THROW_MSG(vmSymbols::java_lang_NullPointerException(), |
| "package is null"); |
| } |
| ModuleEntry* module_entry = get_module_entry(module, CHECK); |
| if (module_entry == NULL) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| "module is invalid"); |
| } |
| |
| if (module_entry->is_named()) { // No-op for unnamed module. |
| PackageEntry *package_entry = get_package_entry(module_entry, package, CHECK); |
| ResourceMark rm(THREAD); |
| if (package_entry == NULL) { |
| const char *package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package)); |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Package %s not found in module %s", |
| package_name != NULL ? package_name : "", |
| module_entry->name()->as_C_string())); |
| } |
| if (package_entry->module() != module_entry) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
| err_msg("Package: %s found in module %s, not in module: %s", |
| package_entry->name()->as_C_string(), |
| package_entry->module()->name()->as_C_string(), |
| module_entry->name()->as_C_string())); |
| } |
| |
| log_debug(modules)("add_module_exports_to_all_unnamed(): package %s in module" |
| " %s is exported to all unnamed modules", |
| package_entry->name()->as_C_string(), |
| module_entry->name()->as_C_string()); |
| |
| // Mark package as exported to all unnamed modules, unless already |
| // unqualifiedly exported. |
| if (!package_entry->is_unqual_exported()) { |
| package_entry->set_is_exported_allUnnamed(); |
| } |
| } |
| } |