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 "logging/logStream.hpp" 41#include "memory/resourceArea.hpp" 42#include "oops/instanceKlass.hpp" 43#include "prims/jvm.h" 44#include "runtime/arguments.hpp" 45#include "runtime/handles.inline.hpp" 46#include "runtime/javaCalls.hpp" 47#include "runtime/reflection.hpp" 48#include "utilities/stringUtils.hpp" 49#include "utilities/utf8.hpp" 50 51static bool verify_module_name(const char *module_name) { 52 if (module_name == NULL) return false; 53 int len = (int)strlen(module_name); 54 return (len > 0 && len <= Symbol::max_length()); 55} 56 57bool Modules::verify_package_name(const char* package_name) { 58 if (package_name == NULL) return false; 59 int len = (int)strlen(package_name); 60 return (len > 0 && len <= Symbol::max_length() && 61 UTF8::is_legal_utf8((const unsigned char *)package_name, len, false) && 62 ClassFileParser::verify_unqualified_name(package_name, len, 63 ClassFileParser::LegalClass)); 64} 65 66static char* get_module_name(oop module, TRAPS) { 67 oop name_oop = java_lang_Module::name(module); 68 if (name_oop == NULL) { 69 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), "Null module name"); 70 } 71 char* module_name = java_lang_String::as_utf8_string(name_oop); 72 if (!verify_module_name(module_name)) { 73 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 74 err_msg("Invalid module name: %s", 75 module_name != NULL ? module_name : "NULL")); 76 } 77 return module_name; 78} 79 80static const char* get_module_version(jstring version) { 81 if (version == NULL) { 82 return NULL; 83 } 84 return java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(version)); 85} 86 87static ModuleEntryTable* get_module_entry_table(Handle h_loader, TRAPS) { 88 // This code can be called during start-up, before the classLoader's classLoader data got 89 // created. So, call register_loader() to make sure the classLoader data gets created. 90 ClassLoaderData *loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 91 return loader_cld->modules(); 92} 93 94static PackageEntryTable* get_package_entry_table(Handle h_loader, TRAPS) { 95 // This code can be called during start-up, before the classLoader's classLoader data got 96 // created. So, call register_loader() to make sure the classLoader data gets created. 97 ClassLoaderData *loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 98 return loader_cld->packages(); 99} 100 101static ModuleEntry* get_module_entry(jobject module, TRAPS) { 102 Handle module_h(THREAD, JNIHandles::resolve(module)); 103 if (!java_lang_Module::is_instance(module_h())) { 104 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 105 "module is not an instance of type java.lang.Module"); 106 } 107 return java_lang_Module::module_entry(module_h(), CHECK_NULL); 108} 109 110static PackageEntry* get_package_entry(ModuleEntry* module_entry, const char* package_name, TRAPS) { 111 ResourceMark rm(THREAD); 112 if (package_name == NULL) return NULL; 113 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(package_name, CHECK_NULL); 114 PackageEntryTable* package_entry_table = module_entry->loader_data()->packages(); 115 assert(package_entry_table != NULL, "Unexpected null package entry table"); 116 return package_entry_table->lookup_only(pkg_symbol); 117} 118 119static PackageEntry* get_package_entry_by_name(Symbol* package, 120 Handle h_loader, 121 TRAPS) { 122 if (package != NULL) { 123 ResourceMark rm(THREAD); 124 if (Modules::verify_package_name(package->as_C_string())) { 125 PackageEntryTable* const package_entry_table = 126 get_package_entry_table(h_loader, CHECK_NULL); 127 assert(package_entry_table != NULL, "Unexpected null package entry table"); 128 return package_entry_table->lookup_only(package); 129 } 130 } 131 return NULL; 132} 133 134bool Modules::is_package_defined(Symbol* package, Handle h_loader, TRAPS) { 135 PackageEntry* res = get_package_entry_by_name(package, h_loader, CHECK_false); 136 return res != NULL; 137} 138 139static void define_javabase_module(jobject module, jstring version, 140 jstring location, const char* const* packages, 141 jsize num_packages, TRAPS) { 142 ResourceMark rm(THREAD); 143 144 Handle module_handle(THREAD, JNIHandles::resolve(module)); 145 146 // Obtain java.base's module version 147 const char* module_version = get_module_version(version); 148 TempNewSymbol version_symbol; 149 if (module_version != NULL) { 150 version_symbol = SymbolTable::new_symbol(module_version, CHECK); 151 } else { 152 version_symbol = NULL; 153 } 154 155 // Obtain java.base's location 156 const char* module_location = NULL; 157 TempNewSymbol location_symbol = NULL; 158 if (location != NULL) { 159 module_location = 160 java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(location)); 161 if (module_location != NULL) { 162 location_symbol = SymbolTable::new_symbol(module_location, CHECK); 163 } 164 } 165 166 167 // Check that the packages are syntactically ok. 168 GrowableArray<Symbol*>* pkg_list = new GrowableArray<Symbol*>(num_packages); 169 for (int x = 0; x < num_packages; x++) { 170 const char *package_name = packages[x]; 171 if (!Modules::verify_package_name(package_name)) { 172 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 173 err_msg("Invalid package name: %s for module: " JAVA_BASE_NAME, package_name)); 174 } 175 Symbol* pkg_symbol = SymbolTable::new_symbol(package_name, CHECK); 176 pkg_list->append(pkg_symbol); 177 } 178 179 // Validate java_base's loader is the boot loader. 180 oop loader = java_lang_Module::loader(module_handle()); 181 if (loader != NULL) { 182 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 183 "Class loader must be the boot class loader"); 184 } 185 Handle h_loader(THREAD, loader); 186 187 // Ensure the boot loader's PackageEntryTable has been created 188 PackageEntryTable* package_table = get_package_entry_table(h_loader, CHECK); 189 assert(pkg_list->length() == 0 || package_table != NULL, "Bad package_table"); 190 191 // Ensure java.base's ModuleEntry has been created 192 assert(ModuleEntryTable::javabase_moduleEntry() != NULL, "No ModuleEntry for " JAVA_BASE_NAME); 193 194 bool duplicate_javabase = false; 195 { 196 MutexLocker m1(Module_lock, THREAD); 197 198 if (ModuleEntryTable::javabase_defined()) { 199 duplicate_javabase = true; 200 } else { 201 202 // Verify that all java.base packages created during bootstrapping are in 203 // pkg_list. If any are not in pkg_list, than a non-java.base class was 204 // loaded erroneously pre java.base module definition. 205 package_table->verify_javabase_packages(pkg_list); 206 207 // loop through and add any new packages for java.base 208 PackageEntry* pkg; 209 for (int x = 0; x < pkg_list->length(); x++) { 210 // Some of java.base's packages were added early in bootstrapping, ignore duplicates. 211 if (package_table->lookup_only(pkg_list->at(x)) == NULL) { 212 pkg = package_table->locked_create_entry_or_null(pkg_list->at(x), ModuleEntryTable::javabase_moduleEntry()); 213 assert(pkg != NULL, "Unable to create a " JAVA_BASE_NAME " package entry"); 214 } 215 // Unable to have a GrowableArray of TempNewSymbol. Must decrement the refcount of 216 // the Symbol* that was created above for each package. The refcount was incremented 217 // by SymbolTable::new_symbol and as well by the PackageEntry creation. 218 pkg_list->at(x)->decrement_refcount(); 219 } 220 221 // Finish defining java.base's ModuleEntry 222 ModuleEntryTable::finalize_javabase(module_handle, version_symbol, location_symbol); 223 } 224 } 225 if (duplicate_javabase) { 226 THROW_MSG(vmSymbols::java_lang_InternalError(), 227 "Module " JAVA_BASE_NAME " is already defined"); 228 } 229 230 // Only the thread that actually defined the base module will get here, 231 // so no locking is needed. 232 233 // Patch any previously loaded class's module field with java.base's java.lang.Module. 234 ModuleEntryTable::patch_javabase_entries(module_handle); 235 236 log_info(module, load)(JAVA_BASE_NAME " location: %s", 237 module_location != NULL ? module_location : "NULL"); 238 log_debug(module)("define_javabase_module(): Definition of module: " 239 JAVA_BASE_NAME ", version: %s, location: %s, package #: %d", 240 module_version != NULL ? module_version : "NULL", 241 module_location != NULL ? module_location : "NULL", 242 pkg_list->length()); 243 244 // packages defined to java.base 245 if (log_is_enabled(Trace, module)) { 246 for (int x = 0; x < pkg_list->length(); x++) { 247 log_trace(module)("define_javabase_module(): creation of package %s for module " JAVA_BASE_NAME, 248 (pkg_list->at(x))->as_C_string()); 249 } 250 } 251} 252 253// Caller needs ResourceMark. 254void throw_dup_pkg_exception(const char* module_name, PackageEntry* package, TRAPS) { 255 const char* package_name = package->name()->as_C_string(); 256 if (package->module()->is_named()) { 257 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), 258 err_msg("Package %s for module %s is already in another module, %s, defined to the class loader", 259 package_name, module_name, package->module()->name()->as_C_string())); 260 } else { 261 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), 262 err_msg("Package %s for module %s is already in the unnamed module defined to the class loader", 263 package_name, module_name)); 264 } 265} 266 267void Modules::define_module(jobject module, jboolean is_open, jstring version, 268 jstring location, const char* const* packages, 269 jsize num_packages, TRAPS) { 270 ResourceMark rm(THREAD); 271 272 if (module == NULL) { 273 THROW_MSG(vmSymbols::java_lang_NullPointerException(), "Null module object"); 274 } 275 276 if (num_packages < 0) { 277 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 278 "num_packages must be >= 0"); 279 } 280 281 if (packages == NULL && num_packages > 0) { 282 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 283 "num_packages should be zero if packages is null"); 284 } 285 286 Handle module_handle(THREAD, JNIHandles::resolve(module)); 287 if (!java_lang_Module::is_instance(module_handle())) { 288 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 289 "module is not an instance of type java.lang.Module"); 290 } 291 292 char* module_name = get_module_name(module_handle(), CHECK); 293 if (module_name == NULL) { 294 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 295 "Module name cannot be null"); 296 } 297 298 // Special handling of java.base definition 299 if (strcmp(module_name, JAVA_BASE_NAME) == 0) { 300 assert(is_open == JNI_FALSE, "java.base module cannot be open"); 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_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, 405 (is_open == JNI_TRUE), module_symbol, 406 version_symbol, location_symbol, loader_data); 407 408 if (module_entry == NULL) { 409 dupl_modules = true; 410 } else { 411 // Add the packages. 412 assert(pkg_list->length() == 0 || package_table != NULL, "Bad package table"); 413 PackageEntry* pkg; 414 for (int y = 0; y < pkg_list->length(); y++) { 415 pkg = package_table->locked_create_entry_or_null(pkg_list->at(y), module_entry); 416 assert(pkg != NULL, "Unable to create a module's package entry"); 417 418 // Unable to have a GrowableArray of TempNewSymbol. Must decrement the refcount of 419 // the Symbol* that was created above for each package. The refcount was incremented 420 // by SymbolTable::new_symbol and as well by the PackageEntry creation. 421 pkg_list->at(y)->decrement_refcount(); 422 } 423 424 // Store pointer to ModuleEntry record in java.lang.Module object. 425 java_lang_Module::set_module_entry(module_handle(), module_entry); 426 } 427 } 428 } // Release the lock 429 430 // any errors ? 431 if (dupl_modules) { 432 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), 433 err_msg("Module %s is already defined", module_name)); 434 } else if (existing_pkg != NULL) { 435 throw_dup_pkg_exception(module_name, existing_pkg, CHECK); 436 } 437 438 log_info(module, load)("%s location: %s", module_name, 439 module_location != NULL ? module_location : "NULL"); 440 LogTarget(Debug, module) lt; 441 if (lt.is_enabled()) { 442 LogStream ls(lt); 443 ls.print("define_module(): creation of module: %s, version: %s, location: %s, ", 444 module_name, module_version != NULL ? module_version : "NULL", 445 module_location != NULL ? module_location : "NULL"); 446 loader_data->print_value_on(&ls); 447 ls.print_cr(", package #: %d", pkg_list->length()); 448 for (int y = 0; y < pkg_list->length(); y++) { 449 log_trace(module)("define_module(): creation of package %s for module %s", 450 (pkg_list->at(y))->as_C_string(), module_name); 451 } 452 } 453 454 // If the module is defined to the boot loader and an exploded build is being 455 // used, prepend <java.home>/modules/modules_name to the system boot class path. 456 if (loader == NULL && !ClassLoader::has_jrt_entry()) { 457 ClassLoader::add_to_exploded_build_list(module_symbol, CHECK); 458 } 459} 460 461void Modules::set_bootloader_unnamed_module(jobject module, TRAPS) { 462 ResourceMark rm(THREAD); 463 464 if (module == NULL) { 465 THROW_MSG(vmSymbols::java_lang_NullPointerException(), "Null module object"); 466 } 467 Handle module_handle(THREAD, JNIHandles::resolve(module)); 468 if (!java_lang_Module::is_instance(module_handle())) { 469 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 470 "module is not an instance of type java.lang.Module"); 471 } 472 473 // Ensure that this is an unnamed module 474 oop name = java_lang_Module::name(module_handle()); 475 if (name != NULL) { 476 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 477 "boot loader's unnamed module's java.lang.Module has a name"); 478 } 479 480 // Validate java_base's loader is the boot loader. 481 oop loader = java_lang_Module::loader(module_handle()); 482 if (loader != NULL) { 483 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 484 "Class loader must be the boot class loader"); 485 } 486 Handle h_loader(THREAD, loader); 487 488 log_debug(module)("set_bootloader_unnamed_module(): recording unnamed module for boot loader"); 489 490 // Set java.lang.Module for the boot loader's unnamed module 491 ClassLoaderData* boot_loader_data = ClassLoaderData::the_null_class_loader_data(); 492 ModuleEntry* unnamed_module = boot_loader_data->unnamed_module(); 493 assert(unnamed_module != NULL, "boot loader's unnamed ModuleEntry not defined"); 494 unnamed_module->set_module(boot_loader_data->add_handle(module_handle)); 495 // Store pointer to the ModuleEntry in the unnamed module's java.lang.Module object. 496 java_lang_Module::set_module_entry(module_handle(), unnamed_module); 497} 498 499void Modules::add_module_exports(jobject from_module, const char* package_name, jobject to_module, TRAPS) { 500 if (package_name == NULL) { 501 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 502 "package is null"); 503 } 504 if (from_module == NULL) { 505 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 506 "from_module is null"); 507 } 508 ModuleEntry* from_module_entry = get_module_entry(from_module, CHECK); 509 if (from_module_entry == NULL) { 510 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 511 "from_module cannot be found"); 512 } 513 514 // All packages in unnamed and open modules are exported by default. 515 if (!from_module_entry->is_named() || from_module_entry->is_open()) return; 516 517 ModuleEntry* to_module_entry; 518 if (to_module == NULL) { 519 to_module_entry = NULL; // It's an unqualified export. 520 } else { 521 to_module_entry = get_module_entry(to_module, CHECK); 522 if (to_module_entry == NULL) { 523 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 524 "to_module is invalid"); 525 } 526 } 527 528 PackageEntry *package_entry = get_package_entry(from_module_entry, package_name, CHECK); 529 ResourceMark rm(THREAD); 530 if (package_entry == NULL) { 531 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 532 err_msg("Package %s not found in from_module %s", 533 package_name != NULL ? package_name : "", 534 from_module_entry->name()->as_C_string())); 535 } 536 if (package_entry->module() != from_module_entry) { 537 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 538 err_msg("Package: %s found in module %s, not in from_module: %s", 539 package_entry->name()->as_C_string(), 540 package_entry->module()->name()->as_C_string(), 541 from_module_entry->name()->as_C_string())); 542 } 543 544 log_debug(module)("add_module_exports(): package %s in module %s is exported to module %s", 545 package_entry->name()->as_C_string(), 546 from_module_entry->name()->as_C_string(), 547 to_module_entry == NULL ? "NULL" : 548 to_module_entry->is_named() ? 549 to_module_entry->name()->as_C_string() : UNNAMED_MODULE); 550 551 // Do nothing if modules are the same. 552 if (from_module_entry != to_module_entry) { 553 package_entry->set_exported(to_module_entry); 554 } 555} 556 557 558void Modules::add_module_exports_qualified(jobject from_module, const char* package, 559 jobject to_module, TRAPS) { 560 if (to_module == NULL) { 561 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 562 "to_module is null"); 563 } 564 add_module_exports(from_module, package, to_module, CHECK); 565} 566 567void Modules::add_reads_module(jobject from_module, jobject to_module, TRAPS) { 568 if (from_module == NULL) { 569 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 570 "from_module is null"); 571 } 572 573 ModuleEntry* from_module_entry = get_module_entry(from_module, CHECK); 574 if (from_module_entry == NULL) { 575 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 576 "from_module is not valid"); 577 } 578 579 ModuleEntry* to_module_entry; 580 if (to_module != NULL) { 581 to_module_entry = get_module_entry(to_module, CHECK); 582 if (to_module_entry == NULL) { 583 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 584 "to_module is invalid"); 585 } 586 } else { 587 to_module_entry = NULL; 588 } 589 590 ResourceMark rm(THREAD); 591 log_debug(module)("add_reads_module(): Adding read from module %s to module %s", 592 from_module_entry->is_named() ? 593 from_module_entry->name()->as_C_string() : UNNAMED_MODULE, 594 to_module_entry == NULL ? "all unnamed" : 595 (to_module_entry->is_named() ? 596 to_module_entry->name()->as_C_string() : UNNAMED_MODULE)); 597 598 // if modules are the same or if from_module is unnamed then no need to add the read. 599 if (from_module_entry != to_module_entry && from_module_entry->is_named()) { 600 from_module_entry->add_read(to_module_entry); 601 } 602} 603 604// This method is called by JFR and JNI. 605jobject Modules::get_module(jclass clazz, TRAPS) { 606 assert(ModuleEntryTable::javabase_defined(), 607 "Attempt to call get_module before " JAVA_BASE_NAME " is defined"); 608 609 if (clazz == NULL) { 610 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 611 "class is null", JNI_FALSE); 612 } 613 oop mirror = JNIHandles::resolve_non_null(clazz); 614 if (mirror == NULL) { 615 log_debug(module)("get_module(): no mirror, returning NULL"); 616 return NULL; 617 } 618 if (!java_lang_Class::is_instance(mirror)) { 619 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 620 "Invalid class", JNI_FALSE); 621 } 622 623 oop module = java_lang_Class::module(mirror); 624 625 assert(module != NULL, "java.lang.Class module field not set"); 626 assert(java_lang_Module::is_instance(module), "module is not an instance of type java.lang.Module"); 627 628 LogTarget(Debug,module) lt; 629 if (lt.is_enabled()) { 630 ResourceMark rm(THREAD); 631 LogStream ls(lt); 632 Klass* klass = java_lang_Class::as_Klass(mirror); 633 oop module_name = java_lang_Module::name(module); 634 if (module_name != NULL) { 635 ls.print("get_module(): module "); 636 java_lang_String::print(module_name, tty); 637 } else { 638 ls.print("get_module(): Unamed Module"); 639 } 640 if (klass != NULL) { 641 ls.print_cr(" for class %s", klass->external_name()); 642 } else { 643 ls.print_cr(" for primitive class"); 644 } 645 } 646 647 return JNIHandles::make_local(THREAD, module); 648} 649 650jobject Modules::get_named_module(Handle h_loader, const char* package_name, TRAPS) { 651 assert(ModuleEntryTable::javabase_defined(), 652 "Attempt to call get_named_module before " JAVA_BASE_NAME " is defined"); 653 assert(h_loader.is_null() || java_lang_ClassLoader::is_subclass(h_loader->klass()), 654 "Class loader is not a subclass of java.lang.ClassLoader"); 655 assert(package_name != NULL, "the package_name should not be NULL"); 656 657 if (strlen(package_name) == 0) { 658 return NULL; 659 } 660 TempNewSymbol package_sym = SymbolTable::new_symbol(package_name, CHECK_NULL); 661 const PackageEntry* const pkg_entry = 662 get_package_entry_by_name(package_sym, h_loader, THREAD); 663 const ModuleEntry* const module_entry = (pkg_entry != NULL ? pkg_entry->module() : NULL); 664 665 if (module_entry != NULL && module_entry->module() != NULL && module_entry->is_named()) { 666 return JNIHandles::make_local(THREAD, module_entry->module()); 667 } 668 return NULL; 669} 670 671 672// This method is called by JFR and by the above method. 673jobject Modules::get_module(Symbol* package_name, Handle h_loader, TRAPS) { 674 const PackageEntry* const pkg_entry = 675 get_package_entry_by_name(package_name, h_loader, THREAD); 676 const ModuleEntry* const module_entry = (pkg_entry != NULL ? pkg_entry->module() : NULL); 677 678 if (module_entry != NULL && 679 module_entry->module() != NULL) { 680 return JNIHandles::make_local(THREAD, module_entry->module()); 681 } 682 683 return NULL; 684} 685 686// Export package in module to all unnamed modules. 687void Modules::add_module_exports_to_all_unnamed(jobject module, const char* package_name, TRAPS) { 688 if (module == NULL) { 689 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 690 "module is null"); 691 } 692 if (package_name == NULL) { 693 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 694 "package is null"); 695 } 696 ModuleEntry* module_entry = get_module_entry(module, CHECK); 697 if (module_entry == NULL) { 698 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 699 "module is invalid"); 700 } 701 702 if (module_entry->is_named()) { // No-op for unnamed module. 703 PackageEntry *package_entry = get_package_entry(module_entry, package_name, CHECK); 704 ResourceMark rm(THREAD); 705 if (package_entry == NULL) { 706 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 707 err_msg("Package %s not found in module %s", 708 package_name != NULL ? package_name : "", 709 module_entry->name()->as_C_string())); 710 } 711 if (package_entry->module() != module_entry) { 712 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 713 err_msg("Package: %s found in module %s, not in module: %s", 714 package_entry->name()->as_C_string(), 715 package_entry->module()->name()->as_C_string(), 716 module_entry->name()->as_C_string())); 717 } 718 719 log_debug(module)("add_module_exports_to_all_unnamed(): package %s in module" 720 " %s is exported to all unnamed modules", 721 package_entry->name()->as_C_string(), 722 module_entry->name()->as_C_string()); 723 724 // Mark package as exported to all unnamed modules. 725 package_entry->set_is_exported_allUnnamed(); 726 } 727} 728