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 49static 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 55bool 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 64static char* get_module_name(oop module, TRAPS) { 65 oop name_oop = java_lang_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 78static 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 85static 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 92static PackageEntryTable* get_package_entry_table(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->packages(); 97} 98 99static ModuleEntry* get_module_entry(jobject module, TRAPS) { 100 Handle module_h(THREAD, JNIHandles::resolve(module)); 101 if (!java_lang_Module::is_instance(module_h())) { 102 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 103 "module is not an instance of type java.lang.Module"); 104 } 105 return java_lang_Module::module_entry(module_h(), CHECK_NULL); 106} 107 108static PackageEntry* get_package_entry(ModuleEntry* module_entry, const char* package_name, TRAPS) { 109 ResourceMark rm(THREAD); 110 if (package_name == NULL) return NULL; 111 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(package_name, CHECK_NULL); 112 PackageEntryTable* package_entry_table = module_entry->loader_data()->packages(); 113 assert(package_entry_table != NULL, "Unexpected null package entry table"); 114 return package_entry_table->lookup_only(pkg_symbol); 115} 116 117static PackageEntry* get_package_entry_by_name(Symbol* package, 118 Handle h_loader, 119 TRAPS) { 120 if (package != NULL) { 121 ResourceMark rm(THREAD); 122 if (Modules::verify_package_name(package->as_C_string())) { 123 PackageEntryTable* const package_entry_table = 124 get_package_entry_table(h_loader, CHECK_NULL); 125 assert(package_entry_table != NULL, "Unexpected null package entry table"); 126 return package_entry_table->lookup_only(package); 127 } 128 } 129 return NULL; 130} 131 132bool Modules::is_package_defined(Symbol* package, Handle h_loader, TRAPS) { 133 PackageEntry* res = get_package_entry_by_name(package, h_loader, CHECK_false); 134 return res != NULL; 135} 136 137static void define_javabase_module(jobject module, jstring version, 138 jstring location, const char* const* packages, 139 jsize num_packages, TRAPS) { 140 ResourceMark rm(THREAD); 141 142 Handle module_handle(THREAD, JNIHandles::resolve(module)); 143 144 // Obtain java.base's module version 145 const char* module_version = get_module_version(version); 146 TempNewSymbol version_symbol; 147 if (module_version != NULL) { 148 version_symbol = SymbolTable::new_symbol(module_version, CHECK); 149 } else { 150 version_symbol = NULL; 151 } 152 153 // Obtain java.base's location 154 const char* module_location = NULL; 155 TempNewSymbol location_symbol = NULL; 156 if (location != NULL) { 157 module_location = 158 java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(location)); 159 if (module_location != NULL) { 160 location_symbol = SymbolTable::new_symbol(module_location, CHECK); 161 } 162 } 163 164 165 // Check that the list of packages has no duplicates and that the 166 // 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 // append_if_missing() returns FALSE if entry already exists. 176 if (!pkg_list->append_if_missing(pkg_symbol)) { 177 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 178 err_msg("Duplicate package name: %s for module " JAVA_BASE_NAME, 179 package_name)); 180 } 181 } 182 183 // Validate java_base's loader is the boot loader. 184 oop loader = java_lang_Module::loader(module_handle()); 185 if (loader != NULL) { 186 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 187 "Class loader must be the boot class loader"); 188 } 189 Handle h_loader = Handle(THREAD, loader); 190 191 // Ensure the boot loader's PackageEntryTable has been created 192 PackageEntryTable* package_table = get_package_entry_table(h_loader, CHECK); 193 assert(pkg_list->length() == 0 || package_table != NULL, "Bad package_table"); 194 195 // Ensure java.base's ModuleEntry has been created 196 assert(ModuleEntryTable::javabase_moduleEntry() != NULL, "No ModuleEntry for " JAVA_BASE_NAME); 197 198 bool duplicate_javabase = false; 199 { 200 MutexLocker m1(Module_lock, THREAD); 201 202 if (ModuleEntryTable::javabase_defined()) { 203 duplicate_javabase = true; 204 } else { 205 206 // Verify that all java.base packages created during bootstrapping are in 207 // pkg_list. If any are not in pkg_list, than a non-java.base class was 208 // loaded erroneously pre java.base module definition. 209 package_table->verify_javabase_packages(pkg_list); 210 211 // loop through and add any new packages for java.base 212 PackageEntry* pkg; 213 for (int x = 0; x < pkg_list->length(); x++) { 214 // Some of java.base's packages were added early in bootstrapping, ignore duplicates. 215 if (package_table->lookup_only(pkg_list->at(x)) == NULL) { 216 pkg = package_table->locked_create_entry_or_null(pkg_list->at(x), ModuleEntryTable::javabase_moduleEntry()); 217 assert(pkg != NULL, "Unable to create a " JAVA_BASE_NAME " package entry"); 218 } 219 // Unable to have a GrowableArray of TempNewSymbol. Must decrement the refcount of 220 // the Symbol* that was created above for each package. The refcount was incremented 221 // by SymbolTable::new_symbol and as well by the PackageEntry creation. 222 pkg_list->at(x)->decrement_refcount(); 223 } 224 225 // Finish defining java.base's ModuleEntry 226 ModuleEntryTable::finalize_javabase(module_handle, version_symbol, location_symbol); 227 } 228 } 229 if (duplicate_javabase) { 230 THROW_MSG(vmSymbols::java_lang_InternalError(), 231 "Module " JAVA_BASE_NAME " is already defined"); 232 } 233 234 // Only the thread that actually defined the base module will get here, 235 // so no locking is needed. 236 237 // Patch any previously loaded class's module field with java.base's java.lang.Module. 238 ModuleEntryTable::patch_javabase_entries(module_handle); 239 240 log_info(module, load)(JAVA_BASE_NAME " location: %s", 241 module_location != NULL ? module_location : "NULL"); 242 log_debug(module)("define_javabase_module(): Definition of module: " 243 JAVA_BASE_NAME ", version: %s, location: %s, package #: %d", 244 module_version != NULL ? module_version : "NULL", 245 module_location != NULL ? module_location : "NULL", 246 pkg_list->length()); 247 248 // packages defined to java.base 249 for (int x = 0; x < pkg_list->length(); x++) { 250 log_trace(module)("define_javabase_module(): creation of package %s for module " JAVA_BASE_NAME, 251 (pkg_list->at(x))->as_C_string()); 252 } 253} 254 255// Caller needs ResourceMark. 256void throw_dup_pkg_exception(const char* module_name, PackageEntry* package, TRAPS) { 257 const char* package_name = package->name()->as_C_string(); 258 if (package->module()->is_named()) { 259 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), 260 err_msg("Package %s for module %s is already in another module, %s, defined to the class loader", 261 package_name, module_name, package->module()->name()->as_C_string())); 262 } else { 263 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), 264 err_msg("Package %s for module %s is already in the unnamed module defined to the class loader", 265 package_name, module_name)); 266 } 267} 268 269void Modules::define_module(jobject module, jstring version, 270 jstring location, const char* const* packages, 271 jsize num_packages, TRAPS) { 272 ResourceMark rm(THREAD); 273 274 if (module == NULL) { 275 THROW_MSG(vmSymbols::java_lang_NullPointerException(), "Null module object"); 276 } 277 278 if (num_packages < 0) { 279 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 280 "num_packages must be >= 0"); 281 } 282 283 if (packages == NULL && num_packages > 0) { 284 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 285 "num_packages should be zero if packages is null"); 286 } 287 288 Handle module_handle(THREAD, JNIHandles::resolve(module)); 289 if (!java_lang_Module::is_instance(module_handle())) { 290 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 291 "module is not an instance of type java.lang.Module"); 292 } 293 294 char* module_name = get_module_name(module_handle(), CHECK); 295 if (module_name == NULL) { 296 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 297 "Module name cannot be null"); 298 } 299 300 // Special handling of java.base definition 301 if (strcmp(module_name, JAVA_BASE_NAME) == 0) { 302 define_javabase_module(module, version, location, packages, num_packages, CHECK); 303 return; 304 } 305 306 const char* module_version = get_module_version(version); 307 308 oop loader = java_lang_Module::loader(module_handle()); 309 // Make sure loader is not the jdk.internal.reflect.DelegatingClassLoader. 310 if (loader != java_lang_ClassLoader::non_reflection_class_loader(loader)) { 311 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 312 "Class loader is an invalid delegating class loader"); 313 } 314 Handle h_loader = Handle(THREAD, loader); 315 316 // Check that the list of packages has no duplicates and that the 317 // packages are syntactically ok. 318 GrowableArray<Symbol*>* pkg_list = new GrowableArray<Symbol*>(num_packages); 319 for (int x = 0; x < num_packages; x++) { 320 const char* package_name = packages[x]; 321 if (!verify_package_name(package_name)) { 322 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 323 err_msg("Invalid package name: %s for module: %s", 324 package_name, module_name)); 325 } 326 327 // Only modules defined to either the boot or platform class loader, can define a "java/" package. 328 if (!h_loader.is_null() && 329 !SystemDictionary::is_platform_class_loader(h_loader) && 330 (strncmp(package_name, JAVAPKG, JAVAPKG_LEN) == 0 && 331 (package_name[JAVAPKG_LEN] == '/' || package_name[JAVAPKG_LEN] == '\0'))) { 332 const char* class_loader_name = SystemDictionary::loader_name(h_loader()); 333 size_t pkg_len = strlen(package_name); 334 char* pkg_name = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, pkg_len); 335 strncpy(pkg_name, package_name, pkg_len); 336 StringUtils::replace_no_expand(pkg_name, "/", "."); 337 const char* msg_text1 = "Class loader (instance of): "; 338 const char* msg_text2 = " tried to define prohibited package name: "; 339 size_t len = strlen(msg_text1) + strlen(class_loader_name) + strlen(msg_text2) + pkg_len + 1; 340 char* message = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, len); 341 jio_snprintf(message, len, "%s%s%s%s", msg_text1, class_loader_name, msg_text2, pkg_name); 342 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), message); 343 } 344 345 Symbol* pkg_symbol = SymbolTable::new_symbol(package_name, CHECK); 346 // append_if_missing() returns FALSE if entry already exists. 347 if (!pkg_list->append_if_missing(pkg_symbol)) { 348 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 349 err_msg("Duplicate package name: %s for module %s", 350 package_name, module_name)); 351 } 352 } 353 354 ModuleEntryTable* module_table = get_module_entry_table(h_loader, CHECK); 355 assert(module_table != NULL, "module entry table shouldn't be null"); 356 357 // Create symbol* entry for module name. 358 TempNewSymbol module_symbol = SymbolTable::new_symbol(module_name, CHECK); 359 360 bool dupl_modules = false; 361 362 // Create symbol* entry for module version. 363 TempNewSymbol version_symbol; 364 if (module_version != NULL) { 365 version_symbol = SymbolTable::new_symbol(module_version, CHECK); 366 } else { 367 version_symbol = NULL; 368 } 369 370 // Create symbol* entry for module location. 371 const char* module_location = NULL; 372 TempNewSymbol location_symbol = NULL; 373 if (location != NULL) { 374 module_location = 375 java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(location)); 376 if (module_location != NULL) { 377 location_symbol = SymbolTable::new_symbol(module_location, CHECK); 378 } 379 } 380 381 ClassLoaderData* loader_data = ClassLoaderData::class_loader_data_or_null(h_loader()); 382 assert(loader_data != NULL, "class loader data shouldn't be null"); 383 384 PackageEntryTable* package_table = NULL; 385 PackageEntry* existing_pkg = NULL; 386 { 387 MutexLocker ml(Module_lock, THREAD); 388 389 if (num_packages > 0) { 390 package_table = get_package_entry_table(h_loader, CHECK); 391 assert(package_table != NULL, "Missing package_table"); 392 393 // Check that none of the packages exist in the class loader's package table. 394 for (int x = 0; x < pkg_list->length(); x++) { 395 existing_pkg = package_table->lookup_only(pkg_list->at(x)); 396 if (existing_pkg != NULL) { 397 // This could be because the module was already defined. If so, 398 // report that error instead of the package error. 399 if (module_table->lookup_only(module_symbol) != NULL) { 400 dupl_modules = true; 401 } 402 break; 403 } 404 } 405 } // if (num_packages > 0)... 406 407 // Add the module and its packages. 408 if (!dupl_modules && existing_pkg == NULL) { 409 // Create the entry for this module in the class loader's module entry table. 410 ModuleEntry* module_entry = module_table->locked_create_entry_or_null(module_handle, module_symbol, 411 version_symbol, location_symbol, loader_data); 412 413 if (module_entry == NULL) { 414 dupl_modules = true; 415 } else { 416 // Add the packages. 417 assert(pkg_list->length() == 0 || package_table != NULL, "Bad package table"); 418 PackageEntry* pkg; 419 for (int y = 0; y < pkg_list->length(); y++) { 420 pkg = package_table->locked_create_entry_or_null(pkg_list->at(y), module_entry); 421 assert(pkg != NULL, "Unable to create a module's package entry"); 422 423 // Unable to have a GrowableArray of TempNewSymbol. Must decrement the refcount of 424 // the Symbol* that was created above for each package. The refcount was incremented 425 // by SymbolTable::new_symbol and as well by the PackageEntry creation. 426 pkg_list->at(y)->decrement_refcount(); 427 } 428 429 // Store pointer to ModuleEntry record in java.lang.Module object. 430 java_lang_Module::set_module_entry(module_handle(), module_entry); 431 } 432 } 433 } // Release the lock 434 435 // any errors ? 436 if (dupl_modules) { 437 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), 438 err_msg("Module %s is already defined", module_name)); 439 } else if (existing_pkg != NULL) { 440 throw_dup_pkg_exception(module_name, existing_pkg, CHECK); 441 } 442 443 log_info(module, load)("%s location: %s", module_name, 444 module_location != NULL ? module_location : "NULL"); 445 if (log_is_enabled(Debug, module)) { 446 outputStream* logst = Log(module)::debug_stream(); 447 logst->print("define_module(): creation of module: %s, version: %s, location: %s, ", 448 module_name, module_version != NULL ? module_version : "NULL", 449 module_location != NULL ? module_location : "NULL"); 450 loader_data->print_value_on(logst); 451 logst->print_cr(", package #: %d", pkg_list->length()); 452 for (int y = 0; y < pkg_list->length(); y++) { 453 log_trace(module)("define_module(): creation of package %s for module %s", 454 (pkg_list->at(y))->as_C_string(), module_name); 455 } 456 } 457 458 // If the module is defined to the boot loader and an exploded build is being 459 // used, prepend <java.home>/modules/modules_name, if it exists, to the system boot class path. 460 if (loader == NULL && 461 !ClassLoader::has_jrt_entry()) { 462 ClassLoader::add_to_exploded_build_list(module_symbol, CHECK); 463 } 464} 465 466void Modules::set_bootloader_unnamed_module(jobject module, TRAPS) { 467 ResourceMark rm(THREAD); 468 469 if (module == NULL) { 470 THROW_MSG(vmSymbols::java_lang_NullPointerException(), "Null module object"); 471 } 472 Handle module_handle(THREAD, JNIHandles::resolve(module)); 473 if (!java_lang_Module::is_instance(module_handle())) { 474 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 475 "module is not an instance of type java.lang.Module"); 476 } 477 478 // Ensure that this is an unnamed module 479 oop name = java_lang_Module::name(module_handle()); 480 if (name != NULL) { 481 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 482 "boot loader's unnamed module's java.lang.Module has a name"); 483 } 484 485 // Validate java_base's loader is the boot loader. 486 oop loader = java_lang_Module::loader(module_handle()); 487 if (loader != NULL) { 488 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 489 "Class loader must be the boot class loader"); 490 } 491 Handle h_loader = Handle(THREAD, loader); 492 493 log_debug(module)("set_bootloader_unnamed_module(): recording unnamed module for boot loader"); 494 495 // Ensure the boot loader's PackageEntryTable has been created 496 ModuleEntryTable* module_table = get_module_entry_table(h_loader, CHECK); 497 498 // Set java.lang.Module for the boot loader's unnamed module 499 ModuleEntry* unnamed_module = module_table->unnamed_module(); 500 assert(unnamed_module != NULL, "boot loader's unnamed ModuleEntry not defined"); 501 unnamed_module->set_module(ClassLoaderData::the_null_class_loader_data()->add_handle(module_handle)); 502 // Store pointer to the ModuleEntry in the unnamed module's java.lang.Module object. 503 java_lang_Module::set_module_entry(module_handle(), unnamed_module); 504} 505 506void Modules::add_module_exports(jobject from_module, const char* package_name, jobject to_module, TRAPS) { 507 if (package_name == NULL) { 508 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 509 "package is null"); 510 } 511 if (from_module == NULL) { 512 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 513 "from_module is null"); 514 } 515 ModuleEntry* from_module_entry = get_module_entry(from_module, CHECK); 516 if (from_module_entry == NULL) { 517 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 518 "from_module cannot be found"); 519 } 520 521 // All packages in unnamed are exported by default. 522 if (!from_module_entry->is_named()) return; 523 524 ModuleEntry* to_module_entry; 525 if (to_module == NULL) { 526 to_module_entry = NULL; // It's an unqualified export. 527 } else { 528 to_module_entry = get_module_entry(to_module, CHECK); 529 if (to_module_entry == NULL) { 530 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 531 "to_module is invalid"); 532 } 533 } 534 535 PackageEntry *package_entry = get_package_entry(from_module_entry, package_name, CHECK); 536 ResourceMark rm(THREAD); 537 if (package_entry == NULL) { 538 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 539 err_msg("Package %s not found in from_module %s", 540 package_name != NULL ? package_name : "", 541 from_module_entry->name()->as_C_string())); 542 } 543 if (package_entry->module() != from_module_entry) { 544 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 545 err_msg("Package: %s found in module %s, not in from_module: %s", 546 package_entry->name()->as_C_string(), 547 package_entry->module()->name()->as_C_string(), 548 from_module_entry->name()->as_C_string())); 549 } 550 551 log_debug(module)("add_module_exports(): package %s in module %s is exported to module %s", 552 package_entry->name()->as_C_string(), 553 from_module_entry->name()->as_C_string(), 554 to_module_entry == NULL ? "NULL" : 555 to_module_entry->is_named() ? 556 to_module_entry->name()->as_C_string() : UNNAMED_MODULE); 557 558 // Do nothing if modules are the same. 559 if (from_module_entry != to_module_entry) { 560 package_entry->set_exported(to_module_entry); 561 } 562} 563 564 565void Modules::add_module_exports_qualified(jobject from_module, const char* package, 566 jobject to_module, TRAPS) { 567 if (to_module == NULL) { 568 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 569 "to_module is null"); 570 } 571 add_module_exports(from_module, package, to_module, CHECK); 572} 573 574void Modules::add_reads_module(jobject from_module, jobject to_module, TRAPS) { 575 if (from_module == NULL) { 576 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 577 "from_module is null"); 578 } 579 580 ModuleEntry* from_module_entry = get_module_entry(from_module, CHECK); 581 if (from_module_entry == NULL) { 582 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 583 "from_module is not valid"); 584 } 585 586 ModuleEntry* to_module_entry; 587 if (to_module != NULL) { 588 to_module_entry = get_module_entry(to_module, CHECK); 589 if (to_module_entry == NULL) { 590 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 591 "to_module is invalid"); 592 } 593 } else { 594 to_module_entry = NULL; 595 } 596 597 ResourceMark rm(THREAD); 598 log_debug(module)("add_reads_module(): Adding read from module %s to module %s", 599 from_module_entry->is_named() ? 600 from_module_entry->name()->as_C_string() : UNNAMED_MODULE, 601 to_module_entry == NULL ? "all unnamed" : 602 (to_module_entry->is_named() ? 603 to_module_entry->name()->as_C_string() : UNNAMED_MODULE)); 604 605 // if modules are the same or if from_module is unnamed then no need to add the read. 606 if (from_module_entry != to_module_entry && from_module_entry->is_named()) { 607 from_module_entry->add_read(to_module_entry); 608 } 609} 610 611// This method is called by JFR and JNI. 612jobject Modules::get_module(jclass clazz, TRAPS) { 613 assert(ModuleEntryTable::javabase_defined(), 614 "Attempt to call get_module before " JAVA_BASE_NAME " is defined"); 615 616 if (clazz == NULL) { 617 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 618 "class is null", JNI_FALSE); 619 } 620 oop mirror = JNIHandles::resolve_non_null(clazz); 621 if (mirror == NULL) { 622 log_debug(module)("get_module(): no mirror, returning NULL"); 623 return NULL; 624 } 625 if (!java_lang_Class::is_instance(mirror)) { 626 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 627 "Invalid class", JNI_FALSE); 628 } 629 630 oop module = java_lang_Class::module(mirror); 631 632 assert(module != NULL, "java.lang.Class module field not set"); 633 assert(java_lang_Module::is_instance(module), "module is not an instance of type java.lang.Module"); 634 635 if (log_is_enabled(Debug, module)) { 636 ResourceMark rm(THREAD); 637 outputStream* logst = Log(module)::debug_stream(); 638 Klass* klass = java_lang_Class::as_Klass(mirror); 639 oop module_name = java_lang_Module::name(module); 640 if (module_name != NULL) { 641 logst->print("get_module(): module "); 642 java_lang_String::print(module_name, tty); 643 } else { 644 logst->print("get_module(): Unamed Module"); 645 } 646 if (klass != NULL) { 647 logst->print_cr(" for class %s", klass->external_name()); 648 } else { 649 logst->print_cr(" for primitive class"); 650 } 651 } 652 653 return JNIHandles::make_local(THREAD, module); 654} 655 656 657jobject Modules::get_module_by_package_name(jobject loader, const char* package_name, TRAPS) { 658 ResourceMark rm(THREAD); 659 assert(ModuleEntryTable::javabase_defined(), 660 "Attempt to call get_module_from_pkg before " JAVA_BASE_NAME " is defined"); 661 662 if (package_name == NULL) { 663 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 664 "package is null", JNI_FALSE); 665 } 666 667 Handle h_loader (THREAD, JNIHandles::resolve(loader)); 668 // Check that loader is a subclass of java.lang.ClassLoader. 669 if (loader != NULL && !java_lang_ClassLoader::is_subclass(h_loader->klass())) { 670 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 671 "Class loader is not a subclass of java.lang.ClassLoader", JNI_FALSE); 672 } 673 674 if (strlen(package_name) == 0) { 675 // Return the unnamed module 676 ModuleEntryTable* module_table = get_module_entry_table(h_loader, CHECK_NULL); 677 if (NULL == module_table) return NULL; 678 const ModuleEntry* const unnamed_module = module_table->unnamed_module(); 679 return JNIHandles::make_local(THREAD, JNIHandles::resolve(unnamed_module->module())); 680 681 } else { 682 TempNewSymbol package_sym = SymbolTable::new_symbol(package_name, CHECK_NULL); 683 return get_module(package_sym, h_loader, CHECK_NULL); 684 } 685 return NULL; 686} 687 688 689jobject Modules::get_named_module(Handle h_loader, const char* package_name, TRAPS) { 690 assert(ModuleEntryTable::javabase_defined(), 691 "Attempt to call get_named_module before " JAVA_BASE_NAME " is defined"); 692 assert(h_loader.is_null() || java_lang_ClassLoader::is_subclass(h_loader->klass()), 693 "Class loader is not a subclass of java.lang.ClassLoader"); 694 assert(package_name != NULL, "the package_name should not be NULL"); 695 696 if (strlen(package_name) == 0) { 697 return NULL; 698 } 699 TempNewSymbol package_sym = SymbolTable::new_symbol(package_name, CHECK_NULL); 700 const PackageEntry* const pkg_entry = 701 get_package_entry_by_name(package_sym, h_loader, THREAD); 702 const ModuleEntry* const module_entry = (pkg_entry != NULL ? pkg_entry->module() : NULL); 703 704 if (module_entry != NULL && module_entry->module() != NULL && module_entry->is_named()) { 705 return JNIHandles::make_local(THREAD, JNIHandles::resolve(module_entry->module())); 706 } 707 return NULL; 708} 709 710 711// This method is called by JFR and by the above method. 712jobject Modules::get_module(Symbol* package_name, Handle h_loader, TRAPS) { 713 const PackageEntry* const pkg_entry = 714 get_package_entry_by_name(package_name, h_loader, THREAD); 715 const ModuleEntry* const module_entry = (pkg_entry != NULL ? pkg_entry->module() : NULL); 716 717 if (module_entry != NULL && 718 module_entry->module() != NULL) { 719 return JNIHandles::make_local(THREAD, JNIHandles::resolve(module_entry->module())); 720 } 721 722 return NULL; 723} 724 725// Export package in module to all unnamed modules. 726void Modules::add_module_exports_to_all_unnamed(jobject module, const char* package_name, TRAPS) { 727 if (module == NULL) { 728 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 729 "module is null"); 730 } 731 if (package_name == NULL) { 732 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 733 "package is null"); 734 } 735 ModuleEntry* module_entry = get_module_entry(module, CHECK); 736 if (module_entry == NULL) { 737 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 738 "module is invalid"); 739 } 740 741 if (module_entry->is_named()) { // No-op for unnamed module. 742 PackageEntry *package_entry = get_package_entry(module_entry, package_name, CHECK); 743 ResourceMark rm(THREAD); 744 if (package_entry == NULL) { 745 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 746 err_msg("Package %s not found in module %s", 747 package_name != NULL ? package_name : "", 748 module_entry->name()->as_C_string())); 749 } 750 if (package_entry->module() != module_entry) { 751 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 752 err_msg("Package: %s found in module %s, not in module: %s", 753 package_entry->name()->as_C_string(), 754 package_entry->module()->name()->as_C_string(), 755 module_entry->name()->as_C_string())); 756 } 757 758 log_debug(module)("add_module_exports_to_all_unnamed(): package %s in module" 759 " %s is exported to all unnamed modules", 760 package_entry->name()->as_C_string(), 761 module_entry->name()->as_C_string()); 762 763 // Mark package as exported to all unnamed modules. 764 package_entry->set_is_exported_allUnnamed(); 765 } 766} 767