1 /* 2 * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/classFileParser.hpp" 27 #include "classfile/classLoader.hpp" 28 #include "classfile/classLoaderData.inline.hpp" 29 #include "classfile/javaAssertions.hpp" 30 #include "classfile/javaClasses.hpp" 31 #include "classfile/javaClasses.inline.hpp" 32 #include "classfile/moduleEntry.hpp" 33 #include "classfile/modules.hpp" 34 #include "classfile/packageEntry.hpp" 35 #include "classfile/stringTable.hpp" 36 #include "classfile/symbolTable.hpp" 37 #include "classfile/systemDictionary.hpp" 38 #include "classfile/vmSymbols.hpp" 39 #include "logging/log.hpp" 40 #include "memory/resourceArea.hpp" 41 #include "oops/instanceKlass.hpp" 42 #include "runtime/arguments.hpp" 43 #include "runtime/handles.inline.hpp" 44 #include "runtime/javaCalls.hpp" 45 #include "runtime/reflection.hpp" 46 #include "utilities/stringUtils.hpp" 47 #include "utilities/utf8.hpp" 48 49 static bool verify_module_name(const char *module_name) { 50 if (module_name == NULL) return false; 51 int len = (int)strlen(module_name); 52 return (len > 0 && len <= Symbol::max_length()); 53 } 54 55 bool Modules::verify_package_name(const char* package_name) { 56 if (package_name == NULL) return false; 57 int len = (int)strlen(package_name); 58 return (len > 0 && len <= Symbol::max_length() && 59 UTF8::is_legal_utf8((const unsigned char *)package_name, len, false) && 60 ClassFileParser::verify_unqualified_name(package_name, len, 61 ClassFileParser::LegalClass)); 62 } 63 64 static char* get_module_name(oop module, TRAPS) { 65 oop name_oop = java_lang_reflect_Module::name(module); 66 if (name_oop == NULL) { 67 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), "Null module name"); 68 } 69 char* module_name = java_lang_String::as_utf8_string(name_oop); 70 if (!verify_module_name(module_name)) { 71 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 72 err_msg("Invalid module name: %s", 73 module_name != NULL ? module_name : "NULL")); 74 } 75 return module_name; 76 } 77 78 static const char* get_module_version(jstring version) { 79 if (version == NULL) { 80 return NULL; 81 } 82 return java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(version)); 83 } 84 85 static ModuleEntryTable* get_module_entry_table(Handle h_loader, TRAPS) { 86 // This code can be called during start-up, before the classLoader's classLoader data got 87 // created. So, call register_loader() to make sure the classLoader data gets created. 88 ClassLoaderData *loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 89 return loader_cld->modules(); 90 } 91 92 static ModuleEntry* get_unnamed_module(Handle h_loader, TRAPS) { 93 // This code can be called during start-up, before the classLoader's classLoader data got 94 // created. So, call register_loader() to make sure the classLoader data gets created. 95 ClassLoaderData *loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 96 return loader_cld->unnamed_module(); 97 } 98 99 static PackageEntryTable* get_package_entry_table(Handle h_loader, TRAPS) { 100 // This code can be called during start-up, before the classLoader's classLoader data got 101 // created. So, call register_loader() to make sure the classLoader data gets created. 102 ClassLoaderData *loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 103 return loader_cld->packages(); 104 } 105 106 static ModuleEntry* get_module_entry(jobject module, TRAPS) { 107 Handle module_h(THREAD, JNIHandles::resolve(module)); 108 if (!java_lang_reflect_Module::is_instance(module_h())) { 109 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 110 "module is not an instance of type java.lang.reflect.Module"); 111 } 112 return java_lang_reflect_Module::module_entry(module_h(), CHECK_NULL); 113 } 114 115 static PackageEntry* get_package_entry(ModuleEntry* module_entry, const char* package_name, TRAPS) { 116 ResourceMark rm(THREAD); 117 if (package_name == NULL) return NULL; 118 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(package_name, CHECK_NULL); 119 PackageEntryTable* package_entry_table = module_entry->loader_data()->packages(); 120 assert(package_entry_table != NULL, "Unexpected null package entry table"); 121 return package_entry_table->lookup_only(pkg_symbol); 122 } 123 124 static PackageEntry* get_package_entry_by_name(Symbol* package, 125 Handle h_loader, 126 TRAPS) { 127 if (package != NULL) { 128 ResourceMark rm(THREAD); 129 if (Modules::verify_package_name(package->as_C_string())) { 130 PackageEntryTable* const package_entry_table = 131 get_package_entry_table(h_loader, CHECK_NULL); 132 assert(package_entry_table != NULL, "Unexpected null package entry table"); 133 return package_entry_table->lookup_only(package); 134 } 135 } 136 return NULL; 137 } 138 139 bool Modules::is_package_defined(Symbol* package, Handle h_loader, TRAPS) { 140 PackageEntry* res = get_package_entry_by_name(package, h_loader, CHECK_false); 141 return res != NULL; 142 } 143 144 static void define_javabase_module(jobject module, jstring version, 145 jstring location, const char* const* packages, 146 jsize num_packages, TRAPS) { 147 ResourceMark rm(THREAD); 148 149 Handle module_handle(THREAD, JNIHandles::resolve(module)); 150 151 // Obtain java.base's module version 152 const char* module_version = get_module_version(version); 153 TempNewSymbol version_symbol; 154 if (module_version != NULL) { 155 version_symbol = SymbolTable::new_symbol(module_version, CHECK); 156 } else { 157 version_symbol = NULL; 158 } 159 160 // Obtain java.base's location 161 const char* module_location = NULL; 162 TempNewSymbol location_symbol = NULL; 163 if (location != NULL) { 164 module_location = 165 java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(location)); 166 if (module_location != NULL) { 167 location_symbol = SymbolTable::new_symbol(module_location, CHECK); 168 } 169 } 170 171 172 // Check that the packages are syntactically ok. 173 GrowableArray<Symbol*>* pkg_list = new GrowableArray<Symbol*>(num_packages); 174 for (int x = 0; x < num_packages; x++) { 175 const char *package_name = packages[x]; 176 if (!Modules::verify_package_name(package_name)) { 177 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 178 err_msg("Invalid package name: %s for module: " JAVA_BASE_NAME, package_name)); 179 } 180 Symbol* pkg_symbol = SymbolTable::new_symbol(package_name, CHECK); 181 pkg_list->append(pkg_symbol); 182 } 183 184 // Validate java_base's loader is the boot loader. 185 oop loader = java_lang_reflect_Module::loader(module_handle()); 186 if (loader != NULL) { 187 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 188 "Class loader must be the boot class loader"); 189 } 190 Handle h_loader(THREAD, loader); 191 192 // Ensure the boot loader's PackageEntryTable has been created 193 PackageEntryTable* package_table = get_package_entry_table(h_loader, CHECK); 194 assert(pkg_list->length() == 0 || package_table != NULL, "Bad package_table"); 195 196 // Ensure java.base's ModuleEntry has been created 197 assert(ModuleEntryTable::javabase_moduleEntry() != NULL, "No ModuleEntry for " JAVA_BASE_NAME); 198 199 bool duplicate_javabase = false; 200 { 201 MutexLocker m1(Module_lock, THREAD); 202 203 if (ModuleEntryTable::javabase_defined()) { 204 duplicate_javabase = true; 205 } else { 206 207 // Verify that all java.base packages created during bootstrapping are in 208 // pkg_list. If any are not in pkg_list, than a non-java.base class was 209 // loaded erroneously pre java.base module definition. 210 package_table->verify_javabase_packages(pkg_list); 211 212 // loop through and add any new packages for java.base 213 PackageEntry* pkg; 214 for (int x = 0; x < pkg_list->length(); x++) { 215 // Some of java.base's packages were added early in bootstrapping, ignore duplicates. 216 if (package_table->lookup_only(pkg_list->at(x)) == NULL) { 217 pkg = package_table->locked_create_entry_or_null(pkg_list->at(x), ModuleEntryTable::javabase_moduleEntry()); 218 assert(pkg != NULL, "Unable to create a " JAVA_BASE_NAME " package entry"); 219 } 220 // Unable to have a GrowableArray of TempNewSymbol. Must decrement the refcount of 221 // the Symbol* that was created above for each package. The refcount was incremented 222 // by SymbolTable::new_symbol and as well by the PackageEntry creation. 223 pkg_list->at(x)->decrement_refcount(); 224 } 225 226 // Finish defining java.base's ModuleEntry 227 ModuleEntryTable::finalize_javabase(module_handle, version_symbol, location_symbol); 228 } 229 } 230 if (duplicate_javabase) { 231 THROW_MSG(vmSymbols::java_lang_InternalError(), 232 "Module " JAVA_BASE_NAME " is already defined"); 233 } 234 235 // Only the thread that actually defined the base module will get here, 236 // so no locking is needed. 237 238 // Patch any previously loaded class's module field with java.base's java.lang.reflect.Module. 239 ModuleEntryTable::patch_javabase_entries(module_handle); 240 241 log_debug(modules)("define_javabase_module(): Definition of module: " 242 JAVA_BASE_NAME ", version: %s, location: %s, package #: %d", 243 module_version != NULL ? module_version : "NULL", 244 module_location != NULL ? module_location : "NULL", 245 pkg_list->length()); 246 247 // packages defined to java.base 248 for (int x = 0; x < pkg_list->length(); x++) { 249 log_trace(modules)("define_javabase_module(): creation of package %s for module " JAVA_BASE_NAME, 250 (pkg_list->at(x))->as_C_string()); 251 } 252 } 253 254 // Caller needs ResourceMark. 255 void throw_dup_pkg_exception(const char* module_name, PackageEntry* package, TRAPS) { 256 const char* package_name = package->name()->as_C_string(); 257 if (package->module()->is_named()) { 258 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), 259 err_msg("Package %s for module %s is already in another module, %s, defined to the class loader", 260 package_name, module_name, package->module()->name()->as_C_string())); 261 } else { 262 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), 263 err_msg("Package %s for module %s is already in the unnamed module defined to the class loader", 264 package_name, module_name)); 265 } 266 } 267 268 void Modules::define_module(jobject module, jstring version, 269 jstring location, const char* const* packages, 270 jsize num_packages, TRAPS) { 271 ResourceMark rm(THREAD); 272 273 if (module == NULL) { 274 THROW_MSG(vmSymbols::java_lang_NullPointerException(), "Null module object"); 275 } 276 277 if (num_packages < 0) { 278 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 279 "num_packages must be >= 0"); 280 } 281 282 if (packages == NULL && num_packages > 0) { 283 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 284 "num_packages should be zero if packages is null"); 285 } 286 287 Handle module_handle(THREAD, JNIHandles::resolve(module)); 288 if (!java_lang_reflect_Module::is_instance(module_handle())) { 289 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 290 "module is not an instance of type java.lang.reflect.Module"); 291 } 292 293 char* module_name = get_module_name(module_handle(), CHECK); 294 if (module_name == NULL) { 295 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 296 "Module name cannot be null"); 297 } 298 299 // Special handling of java.base definition 300 if (strcmp(module_name, JAVA_BASE_NAME) == 0) { 301 define_javabase_module(module, version, location, packages, num_packages, CHECK); 302 return; 303 } 304 305 const char* module_version = get_module_version(version); 306 307 oop loader = java_lang_reflect_Module::loader(module_handle()); 308 // Make sure loader is not the jdk.internal.reflect.DelegatingClassLoader. 309 if (loader != java_lang_ClassLoader::non_reflection_class_loader(loader)) { 310 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 311 "Class loader is an invalid delegating class loader"); 312 } 313 Handle h_loader = Handle(THREAD, loader); 314 315 // Check that the list of packages has no duplicates and that the 316 // packages are syntactically ok. 317 GrowableArray<Symbol*>* pkg_list = new GrowableArray<Symbol*>(num_packages); 318 for (int x = 0; x < num_packages; x++) { 319 const char* package_name = packages[x]; 320 if (!verify_package_name(package_name)) { 321 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 322 err_msg("Invalid package name: %s for module: %s", 323 package_name, module_name)); 324 } 325 326 // Only modules defined to either the boot or platform class loader, can define a "java/" package. 327 if (!h_loader.is_null() && 328 !SystemDictionary::is_platform_class_loader(h_loader()) && 329 (strncmp(package_name, JAVAPKG, JAVAPKG_LEN) == 0 && 330 (package_name[JAVAPKG_LEN] == '/' || package_name[JAVAPKG_LEN] == '\0'))) { 331 const char* class_loader_name = SystemDictionary::loader_name(h_loader()); 332 size_t pkg_len = strlen(package_name); 333 char* pkg_name = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, pkg_len); 334 strncpy(pkg_name, package_name, pkg_len); 335 StringUtils::replace_no_expand(pkg_name, "/", "."); 336 const char* msg_text1 = "Class loader (instance of): "; 337 const char* msg_text2 = " tried to define prohibited package name: "; 338 size_t len = strlen(msg_text1) + strlen(class_loader_name) + strlen(msg_text2) + pkg_len + 1; 339 char* message = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, len); 340 jio_snprintf(message, len, "%s%s%s%s", msg_text1, class_loader_name, msg_text2, pkg_name); 341 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), message); 342 } 343 344 Symbol* pkg_symbol = SymbolTable::new_symbol(package_name, CHECK); 345 pkg_list->append(pkg_symbol); 346 } 347 348 ModuleEntryTable* module_table = get_module_entry_table(h_loader, CHECK); 349 assert(module_table != NULL, "module entry table shouldn't be null"); 350 351 // Create symbol* entry for module name. 352 TempNewSymbol module_symbol = SymbolTable::new_symbol(module_name, CHECK); 353 354 bool dupl_modules = false; 355 356 // Create symbol* entry for module version. 357 TempNewSymbol version_symbol; 358 if (module_version != NULL) { 359 version_symbol = SymbolTable::new_symbol(module_version, CHECK); 360 } else { 361 version_symbol = NULL; 362 } 363 364 // Create symbol* entry for module location. 365 const char* module_location = NULL; 366 TempNewSymbol location_symbol = NULL; 367 if (location != NULL) { 368 module_location = 369 java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(location)); 370 if (module_location != NULL) { 371 location_symbol = SymbolTable::new_symbol(module_location, CHECK); 372 } 373 } 374 375 ClassLoaderData* loader_data = ClassLoaderData::class_loader_data_or_null(h_loader()); 376 assert(loader_data != NULL, "class loader data shouldn't be null"); 377 378 PackageEntryTable* package_table = NULL; 379 PackageEntry* existing_pkg = NULL; 380 { 381 MutexLocker ml(Module_lock, THREAD); 382 383 if (num_packages > 0) { 384 package_table = get_package_entry_table(h_loader, CHECK); 385 assert(package_table != NULL, "Missing package_table"); 386 387 // Check that none of the packages exist in the class loader's package table. 388 for (int x = 0; x < pkg_list->length(); x++) { 389 existing_pkg = package_table->lookup_only(pkg_list->at(x)); 390 if (existing_pkg != NULL) { 391 // This could be because the module was already defined. If so, 392 // report that error instead of the package error. 393 if (module_table->lookup_only(module_symbol) != NULL) { 394 dupl_modules = true; 395 } 396 break; 397 } 398 } 399 } // if (num_packages > 0)... 400 401 // Add the module and its packages. 402 if (!dupl_modules && existing_pkg == NULL) { 403 // Create the entry for this module in the class loader's module entry table. 404 ModuleEntry* module_entry = module_table->locked_create_entry_or_null(module_handle, module_symbol, 405 version_symbol, location_symbol, loader_data); 406 407 if (module_entry == NULL) { 408 dupl_modules = true; 409 } else { 410 // Add the packages. 411 assert(pkg_list->length() == 0 || package_table != NULL, "Bad package table"); 412 PackageEntry* pkg; 413 for (int y = 0; y < pkg_list->length(); y++) { 414 pkg = package_table->locked_create_entry_or_null(pkg_list->at(y), module_entry); 415 assert(pkg != NULL, "Unable to create a module's package entry"); 416 417 // Unable to have a GrowableArray of TempNewSymbol. Must decrement the refcount of 418 // the Symbol* that was created above for each package. The refcount was incremented 419 // by SymbolTable::new_symbol and as well by the PackageEntry creation. 420 pkg_list->at(y)->decrement_refcount(); 421 } 422 423 // Store pointer to ModuleEntry record in java.lang.reflect.Module object. 424 java_lang_reflect_Module::set_module_entry(module_handle(), module_entry); 425 } 426 } 427 } // Release the lock 428 429 // any errors ? 430 if (dupl_modules) { 431 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), 432 err_msg("Module %s is already defined", module_name)); 433 } else if (existing_pkg != NULL) { 434 throw_dup_pkg_exception(module_name, existing_pkg, CHECK); 435 } 436 437 if (log_is_enabled(Debug, modules)) { 438 outputStream* logst = Log(modules)::debug_stream(); 439 logst->print("define_module(): creation of module: %s, version: %s, location: %s, ", 440 module_name, module_version != NULL ? module_version : "NULL", 441 module_location != NULL ? module_location : "NULL"); 442 loader_data->print_value_on(logst); 443 logst->print_cr(", package #: %d", pkg_list->length()); 444 for (int y = 0; y < pkg_list->length(); y++) { 445 log_trace(modules)("define_module(): creation of package %s for module %s", 446 (pkg_list->at(y))->as_C_string(), module_name); 447 } 448 } 449 450 // If the module is defined to the boot loader and an exploded build is being 451 // used, prepend <java.home>/modules/modules_name, if it exists, to the system boot class path. 452 if (loader == NULL && 453 !Universe::is_module_initialized() && 454 !ClassLoader::has_jrt_entry()) { 455 ClassLoader::add_to_exploded_build_list(module_symbol, CHECK); 456 } 457 } 458 459 void Modules::set_bootloader_unnamed_module(jobject module, TRAPS) { 460 ResourceMark rm(THREAD); 461 462 if (module == NULL) { 463 THROW_MSG(vmSymbols::java_lang_NullPointerException(), "Null module object"); 464 } 465 Handle module_handle(THREAD, JNIHandles::resolve(module)); 466 if (!java_lang_reflect_Module::is_instance(module_handle())) { 467 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 468 "module is not an instance of type java.lang.reflect.Module"); 469 } 470 471 // Ensure that this is an unnamed module 472 oop name = java_lang_reflect_Module::name(module_handle()); 473 if (name != NULL) { 474 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 475 "boot loader's unnamed module's java.lang.reflect.Module has a name"); 476 } 477 478 // Validate java_base's loader is the boot loader. 479 oop loader = java_lang_reflect_Module::loader(module_handle()); 480 if (loader != NULL) { 481 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 482 "Class loader must be the boot class loader"); 483 } 484 Handle h_loader(THREAD, loader); 485 486 log_debug(modules)("set_bootloader_unnamed_module(): recording unnamed module for boot loader"); 487 488 // Set java.lang.Module for the boot loader's unnamed module 489 ModuleEntry* unnamed_module = get_unnamed_module(h_loader, CHECK); 490 assert(unnamed_module != NULL, "boot loader's unnamed ModuleEntry not defined"); 491 unnamed_module->set_module(ClassLoaderData::the_null_class_loader_data()->add_handle(module_handle)); 492 // Store pointer to the ModuleEntry in the unnamed module's java.lang.reflect.Module object. 493 java_lang_reflect_Module::set_module_entry(module_handle(), unnamed_module); 494 } 495 496 void Modules::add_module_exports(jobject from_module, const char* package_name, jobject to_module, TRAPS) { 497 if (package_name == NULL) { 498 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 499 "package is null"); 500 } 501 if (from_module == NULL) { 502 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 503 "from_module is null"); 504 } 505 ModuleEntry* from_module_entry = get_module_entry(from_module, CHECK); 506 if (from_module_entry == NULL) { 507 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 508 "from_module cannot be found"); 509 } 510 511 // All packages in unnamed are exported by default. 512 if (!from_module_entry->is_named()) return; 513 514 ModuleEntry* to_module_entry; 515 if (to_module == NULL) { 516 to_module_entry = NULL; // It's an unqualified export. 517 } else { 518 to_module_entry = get_module_entry(to_module, CHECK); 519 if (to_module_entry == NULL) { 520 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 521 "to_module is invalid"); 522 } 523 } 524 525 PackageEntry *package_entry = get_package_entry(from_module_entry, package_name, CHECK); 526 ResourceMark rm(THREAD); 527 if (package_entry == NULL) { 528 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 529 err_msg("Package %s not found in from_module %s", 530 package_name != NULL ? package_name : "", 531 from_module_entry->name()->as_C_string())); 532 } 533 if (package_entry->module() != from_module_entry) { 534 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 535 err_msg("Package: %s found in module %s, not in from_module: %s", 536 package_entry->name()->as_C_string(), 537 package_entry->module()->name()->as_C_string(), 538 from_module_entry->name()->as_C_string())); 539 } 540 541 log_debug(modules)("add_module_exports(): package %s in module %s is exported to module %s", 542 package_entry->name()->as_C_string(), 543 from_module_entry->name()->as_C_string(), 544 to_module_entry == NULL ? "NULL" : 545 to_module_entry->is_named() ? 546 to_module_entry->name()->as_C_string() : UNNAMED_MODULE); 547 548 // Do nothing if modules are the same. 549 if (from_module_entry != to_module_entry) { 550 package_entry->set_exported(to_module_entry); 551 } 552 } 553 554 555 void Modules::add_module_exports_qualified(jobject from_module, const char* package, 556 jobject to_module, TRAPS) { 557 if (to_module == NULL) { 558 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 559 "to_module is null"); 560 } 561 add_module_exports(from_module, package, to_module, CHECK); 562 } 563 564 void Modules::add_reads_module(jobject from_module, jobject to_module, TRAPS) { 565 if (from_module == NULL) { 566 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 567 "from_module is null"); 568 } 569 570 ModuleEntry* from_module_entry = get_module_entry(from_module, CHECK); 571 if (from_module_entry == NULL) { 572 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 573 "from_module is not valid"); 574 } 575 576 ModuleEntry* to_module_entry; 577 if (to_module != NULL) { 578 to_module_entry = get_module_entry(to_module, CHECK); 579 if (to_module_entry == NULL) { 580 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 581 "to_module is invalid"); 582 } 583 } else { 584 to_module_entry = NULL; 585 } 586 587 ResourceMark rm(THREAD); 588 log_debug(modules)("add_reads_module(): Adding read from module %s to module %s", 589 from_module_entry->is_named() ? 590 from_module_entry->name()->as_C_string() : UNNAMED_MODULE, 591 to_module_entry == NULL ? "all unnamed" : 592 (to_module_entry->is_named() ? 593 to_module_entry->name()->as_C_string() : UNNAMED_MODULE)); 594 595 // if modules are the same or if from_module is unnamed then no need to add the read. 596 if (from_module_entry != to_module_entry && from_module_entry->is_named()) { 597 from_module_entry->add_read(to_module_entry); 598 } 599 } 600 601 // This method is called by JFR and JNI. 602 jobject Modules::get_module(jclass clazz, TRAPS) { 603 assert(ModuleEntryTable::javabase_defined(), 604 "Attempt to call get_module before " JAVA_BASE_NAME " is defined"); 605 606 if (clazz == NULL) { 607 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 608 "class is null", JNI_FALSE); 609 } 610 oop mirror = JNIHandles::resolve_non_null(clazz); 611 if (mirror == NULL) { 612 log_debug(modules)("get_module(): no mirror, returning NULL"); 613 return NULL; 614 } 615 if (!java_lang_Class::is_instance(mirror)) { 616 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 617 "Invalid class", JNI_FALSE); 618 } 619 620 oop module = java_lang_Class::module(mirror); 621 622 assert(module != NULL, "java.lang.Class module field not set"); 623 assert(java_lang_reflect_Module::is_instance(module), "module is not an instance of type java.lang.reflect.Module"); 624 625 if (log_is_enabled(Debug, modules)) { 626 ResourceMark rm(THREAD); 627 outputStream* logst = Log(modules)::debug_stream(); 628 Klass* klass = java_lang_Class::as_Klass(mirror); 629 oop module_name = java_lang_reflect_Module::name(module); 630 if (module_name != NULL) { 631 logst->print("get_module(): module "); 632 java_lang_String::print(module_name, tty); 633 } else { 634 logst->print("get_module(): Unamed Module"); 635 } 636 if (klass != NULL) { 637 logst->print_cr(" for class %s", klass->external_name()); 638 } else { 639 logst->print_cr(" for primitive class"); 640 } 641 } 642 643 return JNIHandles::make_local(THREAD, module); 644 } 645 646 jobject Modules::get_named_module(Handle h_loader, const char* package_name, TRAPS) { 647 assert(ModuleEntryTable::javabase_defined(), 648 "Attempt to call get_named_module before " JAVA_BASE_NAME " is defined"); 649 assert(h_loader.is_null() || java_lang_ClassLoader::is_subclass(h_loader->klass()), 650 "Class loader is not a subclass of java.lang.ClassLoader"); 651 assert(package_name != NULL, "the package_name should not be NULL"); 652 653 if (strlen(package_name) == 0) { 654 return NULL; 655 } 656 TempNewSymbol package_sym = SymbolTable::new_symbol(package_name, CHECK_NULL); 657 const PackageEntry* const pkg_entry = 658 get_package_entry_by_name(package_sym, h_loader, THREAD); 659 const ModuleEntry* const module_entry = (pkg_entry != NULL ? pkg_entry->module() : NULL); 660 661 if (module_entry != NULL && module_entry->module() != NULL && module_entry->is_named()) { 662 return JNIHandles::make_local(THREAD, JNIHandles::resolve(module_entry->module())); 663 } 664 return NULL; 665 } 666 667 668 // This method is called by JFR and by the above method. 669 jobject Modules::get_module(Symbol* package_name, Handle h_loader, TRAPS) { 670 const PackageEntry* const pkg_entry = 671 get_package_entry_by_name(package_name, h_loader, THREAD); 672 const ModuleEntry* const module_entry = (pkg_entry != NULL ? pkg_entry->module() : NULL); 673 674 if (module_entry != NULL && 675 module_entry->module() != NULL) { 676 return JNIHandles::make_local(THREAD, JNIHandles::resolve(module_entry->module())); 677 } 678 679 return NULL; 680 } 681 682 void Modules::add_module_package(jobject module, const char* package_name, TRAPS) { 683 ResourceMark rm(THREAD); 684 685 if (module == NULL) { 686 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 687 "module is null"); 688 } 689 if (package_name == NULL) { 690 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 691 "package is null"); 692 } 693 ModuleEntry* module_entry = get_module_entry(module, CHECK); 694 if (module_entry == NULL) { 695 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 696 "module is invalid"); 697 } 698 if (!module_entry->is_named()) { 699 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 700 "module cannot be an unnamed module"); 701 } 702 if (!verify_package_name(package_name)) { 703 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 704 err_msg("Invalid package name: %s", package_name)); 705 } 706 707 ClassLoaderData *loader_data = module_entry->loader_data(); 708 709 // Only modules defined to either the boot or platform class loader, can define a "java/" package. 710 if (!loader_data->is_the_null_class_loader_data() && 711 !loader_data->is_platform_class_loader_data() && 712 (strncmp(package_name, JAVAPKG, JAVAPKG_LEN) == 0 && 713 (package_name[JAVAPKG_LEN] == '/' || package_name[JAVAPKG_LEN] == '\0'))) { 714 const char* class_loader_name = SystemDictionary::loader_name(loader_data); 715 size_t pkg_len = strlen(package_name); 716 char* pkg_name = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, pkg_len); 717 strncpy(pkg_name, package_name, pkg_len); 718 StringUtils::replace_no_expand(pkg_name, "/", "."); 719 const char* msg_text1 = "Class loader (instance of): "; 720 const char* msg_text2 = " tried to define prohibited package name: "; 721 size_t len = strlen(msg_text1) + strlen(class_loader_name) + strlen(msg_text2) + pkg_len + 1; 722 char* message = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, len); 723 jio_snprintf(message, len, "%s%s%s%s", msg_text1, class_loader_name, msg_text2, pkg_name); 724 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), message); 725 } 726 727 log_debug(modules)("add_module_package(): Adding package %s to module %s", 728 package_name, module_entry->name()->as_C_string()); 729 730 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(package_name, CHECK); 731 PackageEntryTable* package_table = loader_data->packages(); 732 assert(package_table != NULL, "Missing package_table"); 733 734 PackageEntry* existing_pkg = NULL; 735 { 736 MutexLocker ml(Module_lock, THREAD); 737 738 // Check that the package does not exist in the class loader's package table. 739 existing_pkg = package_table->lookup_only(pkg_symbol); 740 if (existing_pkg == NULL) { 741 PackageEntry* pkg = package_table->locked_create_entry_or_null(pkg_symbol, module_entry); 742 assert(pkg != NULL, "Unable to create a module's package entry"); 743 } 744 } 745 if (existing_pkg != NULL) { 746 throw_dup_pkg_exception(module_entry->name()->as_C_string(), existing_pkg, CHECK); 747 } 748 } 749 750 // Export package in module to all unnamed modules. 751 void Modules::add_module_exports_to_all_unnamed(jobject module, const char* package_name, TRAPS) { 752 if (module == NULL) { 753 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 754 "module is null"); 755 } 756 if (package_name == NULL) { 757 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 758 "package is null"); 759 } 760 ModuleEntry* module_entry = get_module_entry(module, CHECK); 761 if (module_entry == NULL) { 762 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 763 "module is invalid"); 764 } 765 766 if (module_entry->is_named()) { // No-op for unnamed module. 767 PackageEntry *package_entry = get_package_entry(module_entry, package_name, CHECK); 768 ResourceMark rm(THREAD); 769 if (package_entry == NULL) { 770 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 771 err_msg("Package %s not found in module %s", 772 package_name != NULL ? package_name : "", 773 module_entry->name()->as_C_string())); 774 } 775 if (package_entry->module() != module_entry) { 776 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 777 err_msg("Package: %s found in module %s, not in module: %s", 778 package_entry->name()->as_C_string(), 779 package_entry->module()->name()->as_C_string(), 780 module_entry->name()->as_C_string())); 781 } 782 783 log_debug(modules)("add_module_exports_to_all_unnamed(): package %s in module" 784 " %s is exported to all unnamed modules", 785 package_entry->name()->as_C_string(), 786 module_entry->name()->as_C_string()); 787 788 // Mark package as exported to all unnamed modules. 789 package_entry->set_is_exported_allUnnamed(); 790 } 791 }