--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/classfile/modules.cpp Thu Mar 17 19:04:01 2016 +0000
@@ -0,0 +1,964 @@
+/*
+* 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();
+ }
+ }
+}