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 "prims/jvm.h" 43 #include "runtime/arguments.hpp" 44 #include "runtime/handles.inline.hpp" 45 #include "runtime/javaCalls.hpp" 46 #include "runtime/reflection.hpp" 47 #include "utilities/stringUtils.hpp" 48 #include "utilities/utf8.hpp" 49 50 static bool verify_module_name(const char *module_name) { 51 if (module_name == NULL) return false; 52 int len = (int)strlen(module_name); 53 return (len > 0 && len <= Symbol::max_length()); 54 } 55 56 bool Modules::verify_package_name(const char* package_name) { 57 if (package_name == NULL) return false; 58 int len = (int)strlen(package_name); 59 return (len > 0 && len <= Symbol::max_length() && 60 UTF8::is_legal_utf8((const unsigned char *)package_name, len, false) && 61 ClassFileParser::verify_unqualified_name(package_name, len, 62 ClassFileParser::LegalClass)); 63 } 64 65 static char* get_module_name(oop module, TRAPS) { 66 oop name_oop = java_lang_Module::name(module); 67 if (name_oop == NULL) { 68 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), "Null module name"); 69 } 70 char* module_name = java_lang_String::as_utf8_string(name_oop); 71 if (!verify_module_name(module_name)) { 72 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 73 err_msg("Invalid module name: %s", 74 module_name != NULL ? module_name : "NULL")); 75 } 76 return module_name; 77 } 78 79 static const char* get_module_version(jstring version) { 80 if (version == NULL) { 81 return NULL; 82 } 83 return java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(version)); 84 } 85 86 static ModuleEntryTable* get_module_entry_table(Handle h_loader, TRAPS) { 87 // This code can be called during start-up, before the classLoader's classLoader data got 88 // created. So, call register_loader() to make sure the classLoader data gets created. 89 ClassLoaderData *loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 90 return loader_cld->modules(); 91 } 92 93 static PackageEntryTable* get_package_entry_table(Handle h_loader, TRAPS) { 94 // This code can be called during start-up, before the classLoader's classLoader data got 95 // created. So, call register_loader() to make sure the classLoader data gets created. 96 ClassLoaderData *loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 97 return loader_cld->packages(); 98 } 99 100 static ModuleEntry* get_module_entry(jobject module, TRAPS) { 101 Handle module_h(THREAD, JNIHandles::resolve(module)); 102 if (!java_lang_Module::is_instance(module_h())) { 103 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 104 "module is not an instance of type java.lang.Module"); 105 } 106 return java_lang_Module::module_entry(module_h(), CHECK_NULL); 107 } 108 109 static PackageEntry* get_package_entry(ModuleEntry* module_entry, const char* package_name, TRAPS) { 110 ResourceMark rm(THREAD); 111 if (package_name == NULL) return NULL; 112 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(package_name, CHECK_NULL); 113 PackageEntryTable* package_entry_table = module_entry->loader_data()->packages(); 114 assert(package_entry_table != NULL, "Unexpected null package entry table"); 115 return package_entry_table->lookup_only(pkg_symbol); 116 } 117 118 static PackageEntry* get_package_entry_by_name(Symbol* package, 119 Handle h_loader, 120 TRAPS) { 121 if (package != NULL) { 122 ResourceMark rm(THREAD); 123 if (Modules::verify_package_name(package->as_C_string())) { 124 PackageEntryTable* const package_entry_table = 125 get_package_entry_table(h_loader, CHECK_NULL); 126 assert(package_entry_table != NULL, "Unexpected null package entry table"); 127 return package_entry_table->lookup_only(package); 128 } 129 } 130 return NULL; 131 } 132 133 bool Modules::is_package_defined(Symbol* package, Handle h_loader, TRAPS) { 134 PackageEntry* res = get_package_entry_by_name(package, h_loader, CHECK_false); 135 return res != NULL; 136 } 137 138 static void define_javabase_module(jobject module, jstring version, 139 jstring location, const char* const* packages, 140 jsize num_packages, TRAPS) { 141 ResourceMark rm(THREAD); 142 143 Handle module_handle(THREAD, JNIHandles::resolve(module)); 144 145 // Obtain java.base's module version 146 const char* module_version = get_module_version(version); 147 TempNewSymbol version_symbol; 148 if (module_version != NULL) { 149 version_symbol = SymbolTable::new_symbol(module_version, CHECK); 150 } else { 151 version_symbol = NULL; 152 } 153 154 // Obtain java.base's location 155 const char* module_location = NULL; 156 TempNewSymbol location_symbol = NULL; 157 if (location != NULL) { 158 module_location = 159 java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(location)); 160 if (module_location != NULL) { 161 location_symbol = SymbolTable::new_symbol(module_location, CHECK); 162 } 163 } 164 165 166 // Check that the packages are syntactically ok. 167 GrowableArray<Symbol*>* pkg_list = new GrowableArray<Symbol*>(num_packages); 168 for (int x = 0; x < num_packages; x++) { 169 const char *package_name = packages[x]; 170 if (!Modules::verify_package_name(package_name)) { 171 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 172 err_msg("Invalid package name: %s for module: " JAVA_BASE_NAME, package_name)); 173 } 174 Symbol* pkg_symbol = SymbolTable::new_symbol(package_name, CHECK); 175 pkg_list->append(pkg_symbol); 176 } 177 178 // Validate java_base's loader is the boot loader. 179 oop loader = java_lang_Module::loader(module_handle()); 180 if (loader != NULL) { 181 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 182 "Class loader must be the boot class loader"); 183 } 184 Handle h_loader(THREAD, loader); 185 186 // Ensure the boot loader's PackageEntryTable has been created 187 PackageEntryTable* package_table = get_package_entry_table(h_loader, CHECK); 188 assert(pkg_list->length() == 0 || package_table != NULL, "Bad package_table"); 189 190 // Ensure java.base's ModuleEntry has been created 191 assert(ModuleEntryTable::javabase_moduleEntry() != NULL, "No ModuleEntry for " JAVA_BASE_NAME); 192 193 bool duplicate_javabase = false; 194 { 195 MutexLocker m1(Module_lock, THREAD); 196 197 if (ModuleEntryTable::javabase_defined()) { 198 duplicate_javabase = true; 199 } else { 200 201 // Verify that all java.base packages created during bootstrapping are in 202 // pkg_list. If any are not in pkg_list, than a non-java.base class was 203 // loaded erroneously pre java.base module definition. 204 package_table->verify_javabase_packages(pkg_list); 205 206 // loop through and add any new packages for java.base 207 PackageEntry* pkg; 208 for (int x = 0; x < pkg_list->length(); x++) { 209 // Some of java.base's packages were added early in bootstrapping, ignore duplicates. 210 if (package_table->lookup_only(pkg_list->at(x)) == NULL) { 211 pkg = package_table->locked_create_entry_or_null(pkg_list->at(x), ModuleEntryTable::javabase_moduleEntry()); 212 assert(pkg != NULL, "Unable to create a " JAVA_BASE_NAME " package entry"); 213 } 214 // Unable to have a GrowableArray of TempNewSymbol. Must decrement the refcount of 215 // the Symbol* that was created above for each package. The refcount was incremented 216 // by SymbolTable::new_symbol and as well by the PackageEntry creation. 217 pkg_list->at(x)->decrement_refcount(); 218 } 219 220 // Finish defining java.base's ModuleEntry 221 ModuleEntryTable::finalize_javabase(module_handle, version_symbol, location_symbol); 222 } 223 } 224 if (duplicate_javabase) { 225 THROW_MSG(vmSymbols::java_lang_InternalError(), 226 "Module " JAVA_BASE_NAME " is already defined"); 227 } 228 229 // Only the thread that actually defined the base module will get here, 230 // so no locking is needed. 231 232 // Patch any previously loaded class's module field with java.base's java.lang.Module. 233 ModuleEntryTable::patch_javabase_entries(module_handle); 234 235 log_info(module, load)(JAVA_BASE_NAME " location: %s", 236 module_location != NULL ? module_location : "NULL"); 237 log_debug(module)("define_javabase_module(): Definition of module: " 238 JAVA_BASE_NAME ", version: %s, location: %s, package #: %d", 239 module_version != NULL ? module_version : "NULL", 240 module_location != NULL ? module_location : "NULL", 241 pkg_list->length()); 242 243 // packages defined to java.base 244 if (log_is_enabled(Trace, module)) { 245 for (int x = 0; x < pkg_list->length(); x++) { 246 log_trace(module)("define_javabase_module(): creation of package %s for module " JAVA_BASE_NAME, 247 (pkg_list->at(x))->as_C_string()); 248 } 249 } 250 } 251 252 // Caller needs ResourceMark. 253 void throw_dup_pkg_exception(const char* module_name, PackageEntry* package, TRAPS) { 254 const char* package_name = package->name()->as_C_string(); 255 if (package->module()->is_named()) { 256 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), 257 err_msg("Package %s for module %s is already in another module, %s, defined to the class loader", 258 package_name, module_name, package->module()->name()->as_C_string())); 259 } else { 260 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), 261 err_msg("Package %s for module %s is already in the unnamed module defined to the class loader", 262 package_name, module_name)); 263 } 264 } 265 266 void Modules::define_module(jobject module, jboolean is_open, jstring version, 267 jstring location, const char* const* packages, 268 jsize num_packages, TRAPS) { 269 ResourceMark rm(THREAD); 270 271 if (module == NULL) { 272 THROW_MSG(vmSymbols::java_lang_NullPointerException(), "Null module object"); 273 } 274 275 if (num_packages < 0) { 276 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 277 "num_packages must be >= 0"); 278 } 279 280 if (packages == NULL && num_packages > 0) { 281 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 282 "num_packages should be zero if packages is null"); 283 } 284 285 Handle module_handle(THREAD, JNIHandles::resolve(module)); 286 if (!java_lang_Module::is_instance(module_handle())) { 287 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 288 "module is not an instance of type java.lang.Module"); 289 } 290 291 char* module_name = get_module_name(module_handle(), CHECK); 292 if (module_name == NULL) { 293 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 294 "Module name cannot be null"); 295 } 296 297 // Special handling of java.base definition 298 if (strcmp(module_name, JAVA_BASE_NAME) == 0) { 299 assert(is_open == JNI_FALSE, "java.base module cannot be open"); 300 define_javabase_module(module, version, location, packages, num_packages, CHECK); 301 return; 302 } 303 304 const char* module_version = get_module_version(version); 305 306 oop loader = java_lang_Module::loader(module_handle()); 307 // Make sure loader is not the jdk.internal.reflect.DelegatingClassLoader. 308 if (loader != java_lang_ClassLoader::non_reflection_class_loader(loader)) { 309 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 310 "Class loader is an invalid delegating class loader"); 311 } 312 Handle h_loader = Handle(THREAD, loader); 313 314 // Check that the list of packages has no duplicates and that the 315 // packages are syntactically ok. 316 GrowableArray<Symbol*>* pkg_list = new GrowableArray<Symbol*>(num_packages); 317 for (int x = 0; x < num_packages; x++) { 318 const char* package_name = packages[x]; 319 if (!verify_package_name(package_name)) { 320 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 321 err_msg("Invalid package name: %s for module: %s", 322 package_name, module_name)); 323 } 324 325 // Only modules defined to either the boot or platform class loader, can define a "java/" package. 326 if (!h_loader.is_null() && 327 !SystemDictionary::is_platform_class_loader(h_loader()) && 328 (strncmp(package_name, JAVAPKG, JAVAPKG_LEN) == 0 && 329 (package_name[JAVAPKG_LEN] == '/' || package_name[JAVAPKG_LEN] == '\0'))) { 330 const char* class_loader_name = SystemDictionary::loader_name(h_loader()); 331 size_t pkg_len = strlen(package_name); 332 char* pkg_name = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, pkg_len); 333 strncpy(pkg_name, package_name, pkg_len); 334 StringUtils::replace_no_expand(pkg_name, "/", "."); 335 const char* msg_text1 = "Class loader (instance of): "; 336 const char* msg_text2 = " tried to define prohibited package name: "; 337 size_t len = strlen(msg_text1) + strlen(class_loader_name) + strlen(msg_text2) + pkg_len + 1; 338 char* message = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, len); 339 jio_snprintf(message, len, "%s%s%s%s", msg_text1, class_loader_name, msg_text2, pkg_name); 340 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), message); 341 } 342 343 Symbol* pkg_symbol = SymbolTable::new_symbol(package_name, CHECK); 344 pkg_list->append(pkg_symbol); 345 } 346 347 ModuleEntryTable* module_table = get_module_entry_table(h_loader, CHECK); 348 assert(module_table != NULL, "module entry table shouldn't be null"); 349 350 // Create symbol* entry for module name. 351 TempNewSymbol module_symbol = SymbolTable::new_symbol(module_name, CHECK); 352 353 bool dupl_modules = false; 354 355 // Create symbol* entry for module version. 356 TempNewSymbol version_symbol; 357 if (module_version != NULL) { 358 version_symbol = SymbolTable::new_symbol(module_version, CHECK); 359 } else { 360 version_symbol = NULL; 361 } 362 363 // Create symbol* entry for module location. 364 const char* module_location = NULL; 365 TempNewSymbol location_symbol = NULL; 366 if (location != NULL) { 367 module_location = 368 java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(location)); 369 if (module_location != NULL) { 370 location_symbol = SymbolTable::new_symbol(module_location, CHECK); 371 } 372 } 373 374 ClassLoaderData* loader_data = ClassLoaderData::class_loader_data_or_null(h_loader()); 375 assert(loader_data != NULL, "class loader data shouldn't be null"); 376 377 PackageEntryTable* package_table = NULL; 378 PackageEntry* existing_pkg = NULL; 379 { 380 MutexLocker ml(Module_lock, THREAD); 381 382 if (num_packages > 0) { 383 package_table = get_package_entry_table(h_loader, CHECK); 384 assert(package_table != NULL, "Missing package_table"); 385 386 // Check that none of the packages exist in the class loader's package table. 387 for (int x = 0; x < pkg_list->length(); x++) { 388 existing_pkg = package_table->lookup_only(pkg_list->at(x)); 389 if (existing_pkg != NULL) { 390 // This could be because the module was already defined. If so, 391 // report that error instead of the package error. 392 if (module_table->lookup_only(module_symbol) != NULL) { 393 dupl_modules = true; 394 } 395 break; 396 } 397 } 398 } // if (num_packages > 0)... 399 400 // Add the module and its packages. 401 if (!dupl_modules && existing_pkg == NULL) { 402 // Create the entry for this module in the class loader's module entry table. 403 ModuleEntry* module_entry = module_table->locked_create_entry_or_null(module_handle, 404 (is_open == JNI_TRUE), 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.Module object. 424 java_lang_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 log_info(module, load)("%s location: %s", module_name, 438 module_location != NULL ? module_location : "NULL"); 439 if (log_is_enabled(Debug, module)) { 440 outputStream* logst = Log(module)::debug_stream(); 441 logst->print("define_module(): creation of module: %s, version: %s, location: %s, ", 442 module_name, module_version != NULL ? module_version : "NULL", 443 module_location != NULL ? module_location : "NULL"); 444 loader_data->print_value_on(logst); 445 logst->print_cr(", package #: %d", pkg_list->length()); 446 for (int y = 0; y < pkg_list->length(); y++) { 447 log_trace(module)("define_module(): creation of package %s for module %s", 448 (pkg_list->at(y))->as_C_string(), module_name); 449 } 450 } 451 452 // If the module is defined to the boot loader and an exploded build is being 453 // used, prepend <java.home>/modules/modules_name to the system boot class path. 454 if (loader == NULL && !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_Module::is_instance(module_handle())) { 467 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 468 "module is not an instance of type java.lang.Module"); 469 } 470 471 // Ensure that this is an unnamed module 472 oop name = java_lang_Module::name(module_handle()); 473 if (name != NULL) { 474 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 475 "boot loader's unnamed module's java.lang.Module has a name"); 476 } 477 478 // Validate java_base's loader is the boot loader. 479 oop loader = java_lang_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(module)("set_bootloader_unnamed_module(): recording unnamed module for boot loader"); 487 488 // Set java.lang.Module for the boot loader's unnamed module 489 ClassLoaderData* boot_loader_data = ClassLoaderData::the_null_class_loader_data(); 490 ModuleEntry* unnamed_module = boot_loader_data->unnamed_module(); 491 assert(unnamed_module != NULL, "boot loader's unnamed ModuleEntry not defined"); 492 unnamed_module->set_module(boot_loader_data->add_handle(module_handle)); 493 // Store pointer to the ModuleEntry in the unnamed module's java.lang.Module object. 494 java_lang_Module::set_module_entry(module_handle(), unnamed_module); 495 } 496 497 void Modules::add_module_exports(jobject from_module, const char* package_name, jobject to_module, TRAPS) { 498 if (package_name == NULL) { 499 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 500 "package is null"); 501 } 502 if (from_module == NULL) { 503 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 504 "from_module is null"); 505 } 506 ModuleEntry* from_module_entry = get_module_entry(from_module, CHECK); 507 if (from_module_entry == NULL) { 508 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 509 "from_module cannot be found"); 510 } 511 512 // All packages in unnamed and open modules are exported by default. 513 if (!from_module_entry->is_named() || from_module_entry->is_open()) return; 514 515 ModuleEntry* to_module_entry; 516 if (to_module == NULL) { 517 to_module_entry = NULL; // It's an unqualified export. 518 } else { 519 to_module_entry = get_module_entry(to_module, CHECK); 520 if (to_module_entry == NULL) { 521 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 522 "to_module is invalid"); 523 } 524 } 525 526 PackageEntry *package_entry = get_package_entry(from_module_entry, package_name, CHECK); 527 ResourceMark rm(THREAD); 528 if (package_entry == NULL) { 529 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 530 err_msg("Package %s not found in from_module %s", 531 package_name != NULL ? package_name : "", 532 from_module_entry->name()->as_C_string())); 533 } 534 if (package_entry->module() != from_module_entry) { 535 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 536 err_msg("Package: %s found in module %s, not in from_module: %s", 537 package_entry->name()->as_C_string(), 538 package_entry->module()->name()->as_C_string(), 539 from_module_entry->name()->as_C_string())); 540 } 541 542 log_debug(module)("add_module_exports(): package %s in module %s is exported to module %s", 543 package_entry->name()->as_C_string(), 544 from_module_entry->name()->as_C_string(), 545 to_module_entry == NULL ? "NULL" : 546 to_module_entry->is_named() ? 547 to_module_entry->name()->as_C_string() : UNNAMED_MODULE); 548 549 // Do nothing if modules are the same. 550 if (from_module_entry != to_module_entry) { 551 package_entry->set_exported(to_module_entry); 552 } 553 } 554 555 556 void Modules::add_module_exports_qualified(jobject from_module, const char* package, 557 jobject to_module, TRAPS) { 558 if (to_module == NULL) { 559 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 560 "to_module is null"); 561 } 562 add_module_exports(from_module, package, to_module, CHECK); 563 } 564 565 void Modules::add_reads_module(jobject from_module, jobject to_module, TRAPS) { 566 if (from_module == NULL) { 567 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 568 "from_module is null"); 569 } 570 571 ModuleEntry* from_module_entry = get_module_entry(from_module, CHECK); 572 if (from_module_entry == NULL) { 573 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 574 "from_module is not valid"); 575 } 576 577 ModuleEntry* to_module_entry; 578 if (to_module != NULL) { 579 to_module_entry = get_module_entry(to_module, CHECK); 580 if (to_module_entry == NULL) { 581 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 582 "to_module is invalid"); 583 } 584 } else { 585 to_module_entry = NULL; 586 } 587 588 ResourceMark rm(THREAD); 589 log_debug(module)("add_reads_module(): Adding read from module %s to module %s", 590 from_module_entry->is_named() ? 591 from_module_entry->name()->as_C_string() : UNNAMED_MODULE, 592 to_module_entry == NULL ? "all unnamed" : 593 (to_module_entry->is_named() ? 594 to_module_entry->name()->as_C_string() : UNNAMED_MODULE)); 595 596 // if modules are the same or if from_module is unnamed then no need to add the read. 597 if (from_module_entry != to_module_entry && from_module_entry->is_named()) { 598 from_module_entry->add_read(to_module_entry); 599 } 600 } 601 602 // This method is called by JFR and JNI. 603 jobject Modules::get_module(jclass clazz, TRAPS) { 604 assert(ModuleEntryTable::javabase_defined(), 605 "Attempt to call get_module before " JAVA_BASE_NAME " is defined"); 606 607 if (clazz == NULL) { 608 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 609 "class is null", JNI_FALSE); 610 } 611 oop mirror = JNIHandles::resolve_non_null(clazz); 612 if (mirror == NULL) { 613 log_debug(module)("get_module(): no mirror, returning NULL"); 614 return NULL; 615 } 616 if (!java_lang_Class::is_instance(mirror)) { 617 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 618 "Invalid class", JNI_FALSE); 619 } 620 621 oop module = java_lang_Class::module(mirror); 622 623 assert(module != NULL, "java.lang.Class module field not set"); 624 assert(java_lang_Module::is_instance(module), "module is not an instance of type java.lang.Module"); 625 626 if (log_is_enabled(Debug, module)) { 627 ResourceMark rm(THREAD); 628 outputStream* logst = Log(module)::debug_stream(); 629 Klass* klass = java_lang_Class::as_Klass(mirror); 630 oop module_name = java_lang_Module::name(module); 631 if (module_name != NULL) { 632 logst->print("get_module(): module "); 633 java_lang_String::print(module_name, tty); 634 } else { 635 logst->print("get_module(): Unamed Module"); 636 } 637 if (klass != NULL) { 638 logst->print_cr(" for class %s", klass->external_name()); 639 } else { 640 logst->print_cr(" for primitive class"); 641 } 642 } 643 644 return JNIHandles::make_local(THREAD, module); 645 } 646 647 jobject Modules::get_named_module(Handle h_loader, const char* package_name, TRAPS) { 648 assert(ModuleEntryTable::javabase_defined(), 649 "Attempt to call get_named_module before " JAVA_BASE_NAME " is defined"); 650 assert(h_loader.is_null() || java_lang_ClassLoader::is_subclass(h_loader->klass()), 651 "Class loader is not a subclass of java.lang.ClassLoader"); 652 assert(package_name != NULL, "the package_name should not be NULL"); 653 654 if (strlen(package_name) == 0) { 655 return NULL; 656 } 657 TempNewSymbol package_sym = SymbolTable::new_symbol(package_name, CHECK_NULL); 658 const PackageEntry* const pkg_entry = 659 get_package_entry_by_name(package_sym, h_loader, THREAD); 660 const ModuleEntry* const module_entry = (pkg_entry != NULL ? pkg_entry->module() : NULL); 661 662 if (module_entry != NULL && module_entry->module() != NULL && module_entry->is_named()) { 663 return JNIHandles::make_local(THREAD, JNIHandles::resolve(module_entry->module())); 664 } 665 return NULL; 666 } 667 668 669 // This method is called by JFR and by the above method. 670 jobject Modules::get_module(Symbol* package_name, Handle h_loader, TRAPS) { 671 const PackageEntry* const pkg_entry = 672 get_package_entry_by_name(package_name, h_loader, THREAD); 673 const ModuleEntry* const module_entry = (pkg_entry != NULL ? pkg_entry->module() : NULL); 674 675 if (module_entry != NULL && 676 module_entry->module() != NULL) { 677 return JNIHandles::make_local(THREAD, JNIHandles::resolve(module_entry->module())); 678 } 679 680 return NULL; 681 } 682 683 // Export package in module to all unnamed modules. 684 void Modules::add_module_exports_to_all_unnamed(jobject module, const char* package_name, TRAPS) { 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 } 698 699 if (module_entry->is_named()) { // No-op for unnamed module. 700 PackageEntry *package_entry = get_package_entry(module_entry, package_name, CHECK); 701 ResourceMark rm(THREAD); 702 if (package_entry == NULL) { 703 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 704 err_msg("Package %s not found in module %s", 705 package_name != NULL ? package_name : "", 706 module_entry->name()->as_C_string())); 707 } 708 if (package_entry->module() != module_entry) { 709 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 710 err_msg("Package: %s found in module %s, not in module: %s", 711 package_entry->name()->as_C_string(), 712 package_entry->module()->name()->as_C_string(), 713 module_entry->name()->as_C_string())); 714 } 715 716 log_debug(module)("add_module_exports_to_all_unnamed(): package %s in module" 717 " %s is exported to all unnamed modules", 718 package_entry->name()->as_C_string(), 719 module_entry->name()->as_C_string()); 720 721 // Mark package as exported to all unnamed modules. 722 package_entry->set_is_exported_allUnnamed(); 723 } 724 }