author | mockner |
Fri, 29 Apr 2016 22:40:51 -0400 | |
changeset 38151 | fffedc5e5cf8 |
parent 38014 | 8731fa11f766 |
child 38207 | 2ed792c9481d |
permissions | -rw-r--r-- |
/* * 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 "memory/resourceArea.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(class, load)("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(class, load)("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); if (ModuleEntryTable::javabase_defined()) { THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Module java.base is already defined"); } // 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 = Log(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 = Log(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(); } } }