1 /* 2 * Copyright (c) 1997, 2019, 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 "jvm.h" 27 #include "jimage.hpp" 28 #include "classfile/classFileStream.hpp" 29 #include "classfile/classLoader.inline.hpp" 30 #include "classfile/classLoaderData.inline.hpp" 31 #include "classfile/classLoaderExt.hpp" 32 #include "classfile/javaClasses.hpp" 33 #include "classfile/moduleEntry.hpp" 34 #include "classfile/modules.hpp" 35 #include "classfile/packageEntry.hpp" 36 #include "classfile/klassFactory.hpp" 37 #include "classfile/symbolTable.hpp" 38 #include "classfile/systemDictionary.hpp" 39 #include "classfile/systemDictionaryShared.hpp" 40 #include "classfile/vmSymbols.hpp" 41 #include "compiler/compileBroker.hpp" 42 #include "interpreter/bytecodeStream.hpp" 43 #include "interpreter/oopMapCache.hpp" 44 #include "logging/log.hpp" 45 #include "logging/logStream.hpp" 46 #include "logging/logTag.hpp" 47 #include "memory/allocation.inline.hpp" 48 #include "memory/filemap.hpp" 49 #include "memory/oopFactory.hpp" 50 #include "memory/resourceArea.hpp" 51 #include "memory/universe.hpp" 52 #include "oops/instanceKlass.hpp" 53 #include "oops/instanceRefKlass.hpp" 54 #include "oops/method.inline.hpp" 55 #include "oops/objArrayOop.inline.hpp" 56 #include "oops/oop.inline.hpp" 57 #include "oops/symbol.hpp" 58 #include "prims/jvm_misc.hpp" 59 #include "runtime/arguments.hpp" 60 #include "runtime/compilationPolicy.hpp" 61 #include "runtime/handles.inline.hpp" 62 #include "runtime/init.hpp" 63 #include "runtime/interfaceSupport.inline.hpp" 64 #include "runtime/java.hpp" 65 #include "runtime/javaCalls.hpp" 66 #include "runtime/os.inline.hpp" 67 #include "runtime/threadCritical.hpp" 68 #include "runtime/timer.hpp" 69 #include "runtime/vm_version.hpp" 70 #include "services/management.hpp" 71 #include "services/threadService.hpp" 72 #include "utilities/classpathStream.hpp" 73 #include "utilities/events.hpp" 74 #include "utilities/hashtable.inline.hpp" 75 #include "utilities/macros.hpp" 76 #if INCLUDE_CDS 77 #include "classfile/sharedPathsMiscInfo.hpp" 78 #endif 79 80 // Entry points in zip.dll for loading zip/jar file entries 81 82 typedef void * * (*ZipOpen_t)(const char *name, char **pmsg); 83 typedef void (*ZipClose_t)(jzfile *zip); 84 typedef jzentry* (*FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen); 85 typedef jboolean (*ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf); 86 typedef jzentry* (*GetNextEntry_t)(jzfile *zip, jint n); 87 typedef jboolean (*ZipInflateFully_t)(void *inBuf, jlong inLen, void *outBuf, jlong outLen, char **pmsg); 88 typedef jint (*Crc32_t)(jint crc, const jbyte *buf, jint len); 89 90 static ZipOpen_t ZipOpen = NULL; 91 static ZipClose_t ZipClose = NULL; 92 static FindEntry_t FindEntry = NULL; 93 static ReadEntry_t ReadEntry = NULL; 94 static GetNextEntry_t GetNextEntry = NULL; 95 static canonicalize_fn_t CanonicalizeEntry = NULL; 96 static ZipInflateFully_t ZipInflateFully = NULL; 97 static Crc32_t Crc32 = NULL; 98 99 // Entry points for jimage.dll for loading jimage file entries 100 101 static JImageOpen_t JImageOpen = NULL; 102 static JImageClose_t JImageClose = NULL; 103 static JImagePackageToModule_t JImagePackageToModule = NULL; 104 static JImageFindResource_t JImageFindResource = NULL; 105 static JImageGetResource_t JImageGetResource = NULL; 106 static JImageResourceIterator_t JImageResourceIterator = NULL; 107 108 // Globals 109 110 PerfCounter* ClassLoader::_perf_accumulated_time = NULL; 111 PerfCounter* ClassLoader::_perf_classes_inited = NULL; 112 PerfCounter* ClassLoader::_perf_class_init_time = NULL; 113 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL; 114 PerfCounter* ClassLoader::_perf_classes_verified = NULL; 115 PerfCounter* ClassLoader::_perf_class_verify_time = NULL; 116 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL; 117 PerfCounter* ClassLoader::_perf_classes_linked = NULL; 118 PerfCounter* ClassLoader::_perf_class_link_time = NULL; 119 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL; 120 PerfCounter* ClassLoader::_perf_class_parse_time = NULL; 121 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL; 122 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL; 123 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL; 124 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL; 125 PerfCounter* ClassLoader::_perf_app_classload_time = NULL; 126 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL; 127 PerfCounter* ClassLoader::_perf_app_classload_count = NULL; 128 PerfCounter* ClassLoader::_perf_define_appclasses = NULL; 129 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL; 130 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL; 131 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL; 132 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL; 133 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL; 134 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL; 135 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL; 136 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL; 137 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL; 138 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL; 139 140 GrowableArray<ModuleClassPathList*>* ClassLoader::_patch_mod_entries = NULL; 141 GrowableArray<ModuleClassPathList*>* ClassLoader::_exploded_entries = NULL; 142 ClassPathEntry* ClassLoader::_jrt_entry = NULL; 143 ClassPathEntry* ClassLoader::_first_append_entry = NULL; 144 ClassPathEntry* ClassLoader::_last_append_entry = NULL; 145 #if INCLUDE_CDS 146 ClassPathEntry* ClassLoader::_app_classpath_entries = NULL; 147 ClassPathEntry* ClassLoader::_last_app_classpath_entry = NULL; 148 ClassPathEntry* ClassLoader::_module_path_entries = NULL; 149 ClassPathEntry* ClassLoader::_last_module_path_entry = NULL; 150 SharedPathsMiscInfo* ClassLoader::_shared_paths_misc_info = NULL; 151 #endif 152 153 // helper routines 154 bool string_starts_with(const char* str, const char* str_to_find) { 155 size_t str_len = strlen(str); 156 size_t str_to_find_len = strlen(str_to_find); 157 if (str_to_find_len > str_len) { 158 return false; 159 } 160 return (strncmp(str, str_to_find, str_to_find_len) == 0); 161 } 162 163 static const char* get_jimage_version_string() { 164 static char version_string[10] = ""; 165 if (version_string[0] == '\0') { 166 jio_snprintf(version_string, sizeof(version_string), "%d.%d", 167 VM_Version::vm_major_version(), VM_Version::vm_minor_version()); 168 } 169 return (const char*)version_string; 170 } 171 172 bool ClassLoader::string_ends_with(const char* str, const char* str_to_find) { 173 size_t str_len = strlen(str); 174 size_t str_to_find_len = strlen(str_to_find); 175 if (str_to_find_len > str_len) { 176 return false; 177 } 178 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0); 179 } 180 181 // Used to obtain the package name from a fully qualified class name. 182 // It is the responsibility of the caller to establish a ResourceMark. 183 const char* ClassLoader::package_from_name(const char* const class_name, bool* bad_class_name) { 184 if (class_name == NULL) { 185 if (bad_class_name != NULL) { 186 *bad_class_name = true; 187 } 188 return NULL; 189 } 190 191 if (bad_class_name != NULL) { 192 *bad_class_name = false; 193 } 194 195 const char* const last_slash = strrchr(class_name, '/'); 196 if (last_slash == NULL) { 197 // No package name 198 return NULL; 199 } 200 201 char* class_name_ptr = (char*) class_name; 202 // Skip over '['s 203 if (*class_name_ptr == '[') { 204 do { 205 class_name_ptr++; 206 } while (*class_name_ptr == '['); 207 208 // Fully qualified class names should not contain a 'L'. 209 // Set bad_class_name to true to indicate that the package name 210 // could not be obtained due to an error condition. 211 // In this situation, is_same_class_package returns false. 212 if (*class_name_ptr == 'L') { 213 if (bad_class_name != NULL) { 214 *bad_class_name = true; 215 } 216 return NULL; 217 } 218 } 219 220 int length = last_slash - class_name_ptr; 221 222 // A class name could have just the slash character in the name. 223 if (length <= 0) { 224 // No package name 225 if (bad_class_name != NULL) { 226 *bad_class_name = true; 227 } 228 return NULL; 229 } 230 231 // drop name after last slash (including slash) 232 // Ex., "java/lang/String.class" => "java/lang" 233 char* pkg_name = NEW_RESOURCE_ARRAY(char, length + 1); 234 strncpy(pkg_name, class_name_ptr, length); 235 *(pkg_name+length) = '\0'; 236 237 return (const char *)pkg_name; 238 } 239 240 // Given a fully qualified class name, find its defining package in the class loader's 241 // package entry table. 242 PackageEntry* ClassLoader::get_package_entry(const char* class_name, ClassLoaderData* loader_data, TRAPS) { 243 ResourceMark rm(THREAD); 244 const char *pkg_name = ClassLoader::package_from_name(class_name); 245 if (pkg_name == NULL) { 246 return NULL; 247 } 248 PackageEntryTable* pkgEntryTable = loader_data->packages(); 249 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(pkg_name); 250 return pkgEntryTable->lookup_only(pkg_symbol); 251 } 252 253 ClassPathDirEntry::ClassPathDirEntry(const char* dir) : ClassPathEntry() { 254 char* copy = NEW_C_HEAP_ARRAY(char, strlen(dir)+1, mtClass); 255 strcpy(copy, dir); 256 _dir = copy; 257 } 258 259 260 ClassFileStream* ClassPathDirEntry::open_stream(const char* name, TRAPS) { 261 // construct full path name 262 assert((_dir != NULL) && (name != NULL), "sanity"); 263 size_t path_len = strlen(_dir) + strlen(name) + strlen(os::file_separator()) + 1; 264 char* path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, path_len); 265 int len = jio_snprintf(path, path_len, "%s%s%s", _dir, os::file_separator(), name); 266 assert(len == (int)(path_len - 1), "sanity"); 267 // check if file exists 268 struct stat st; 269 if (os::stat(path, &st) == 0) { 270 // found file, open it 271 int file_handle = os::open(path, 0, 0); 272 if (file_handle != -1) { 273 // read contents into resource array 274 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size); 275 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size); 276 // close file 277 os::close(file_handle); 278 // construct ClassFileStream 279 if (num_read == (size_t)st.st_size) { 280 if (UsePerfData) { 281 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read); 282 } 283 FREE_RESOURCE_ARRAY(char, path, path_len); 284 // Resource allocated 285 return new ClassFileStream(buffer, 286 st.st_size, 287 _dir, 288 ClassFileStream::verify); 289 } 290 } 291 } 292 FREE_RESOURCE_ARRAY(char, path, path_len); 293 return NULL; 294 } 295 296 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name, 297 bool is_boot_append, bool from_class_path_attr) : ClassPathEntry() { 298 _zip = zip; 299 char *copy = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1, mtClass); 300 strcpy(copy, zip_name); 301 _zip_name = copy; 302 _from_class_path_attr = from_class_path_attr; 303 } 304 305 ClassPathZipEntry::~ClassPathZipEntry() { 306 if (ZipClose != NULL) { 307 (*ZipClose)(_zip); 308 } 309 FREE_C_HEAP_ARRAY(char, _zip_name); 310 } 311 312 u1* ClassPathZipEntry::open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS) { 313 // enable call to C land 314 JavaThread* thread = JavaThread::current(); 315 ThreadToNativeFromVM ttn(thread); 316 // check whether zip archive contains name 317 jint name_len; 318 jzentry* entry = (*FindEntry)(_zip, name, filesize, &name_len); 319 if (entry == NULL) return NULL; 320 u1* buffer; 321 char name_buf[128]; 322 char* filename; 323 if (name_len < 128) { 324 filename = name_buf; 325 } else { 326 filename = NEW_RESOURCE_ARRAY(char, name_len + 1); 327 } 328 329 // read contents into resource array 330 int size = (*filesize) + ((nul_terminate) ? 1 : 0); 331 buffer = NEW_RESOURCE_ARRAY(u1, size); 332 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL; 333 334 // return result 335 if (nul_terminate) { 336 buffer[*filesize] = 0; 337 } 338 return buffer; 339 } 340 341 ClassFileStream* ClassPathZipEntry::open_stream(const char* name, TRAPS) { 342 jint filesize; 343 u1* buffer = open_entry(name, &filesize, false, CHECK_NULL); 344 if (buffer == NULL) { 345 return NULL; 346 } 347 if (UsePerfData) { 348 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize); 349 } 350 // Resource allocated 351 return new ClassFileStream(buffer, 352 filesize, 353 _zip_name, 354 ClassFileStream::verify); 355 } 356 357 // invoke function for each entry in the zip file 358 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) { 359 JavaThread* thread = JavaThread::current(); 360 HandleMark handle_mark(thread); 361 ThreadToNativeFromVM ttn(thread); 362 for (int n = 0; ; n++) { 363 jzentry * ze = ((*GetNextEntry)(_zip, n)); 364 if (ze == NULL) break; 365 (*f)(ze->name, context); 366 } 367 } 368 369 DEBUG_ONLY(ClassPathImageEntry* ClassPathImageEntry::_singleton = NULL;) 370 371 void ClassPathImageEntry::close_jimage() { 372 if (_jimage != NULL) { 373 (*JImageClose)(_jimage); 374 _jimage = NULL; 375 } 376 } 377 378 ClassPathImageEntry::ClassPathImageEntry(JImageFile* jimage, const char* name) : 379 ClassPathEntry(), 380 _jimage(jimage) { 381 guarantee(jimage != NULL, "jimage file is null"); 382 guarantee(name != NULL, "jimage file name is null"); 383 assert(_singleton == NULL, "VM supports only one jimage"); 384 DEBUG_ONLY(_singleton = this); 385 size_t len = strlen(name) + 1; 386 _name = NEW_C_HEAP_ARRAY(const char, len, mtClass); 387 strncpy((char *)_name, name, len); 388 } 389 390 ClassPathImageEntry::~ClassPathImageEntry() { 391 assert(_singleton == this, "must be"); 392 DEBUG_ONLY(_singleton = NULL); 393 394 if (_name != NULL) { 395 FREE_C_HEAP_ARRAY(const char, _name); 396 _name = NULL; 397 } 398 if (_jimage != NULL) { 399 (*JImageClose)(_jimage); 400 _jimage = NULL; 401 } 402 } 403 404 ClassFileStream* ClassPathImageEntry::open_stream(const char* name, TRAPS) { 405 return open_stream_for_loader(name, ClassLoaderData::the_null_class_loader_data(), THREAD); 406 } 407 408 // For a class in a named module, look it up in the jimage file using this syntax: 409 // /<module-name>/<package-name>/<base-class> 410 // 411 // Assumptions: 412 // 1. There are no unnamed modules in the jimage file. 413 // 2. A package is in at most one module in the jimage file. 414 // 415 ClassFileStream* ClassPathImageEntry::open_stream_for_loader(const char* name, ClassLoaderData* loader_data, TRAPS) { 416 jlong size; 417 JImageLocationRef location = (*JImageFindResource)(_jimage, "", get_jimage_version_string(), name, &size); 418 419 if (location == 0) { 420 ResourceMark rm; 421 const char* pkg_name = ClassLoader::package_from_name(name); 422 423 if (pkg_name != NULL) { 424 if (!Universe::is_module_initialized()) { 425 location = (*JImageFindResource)(_jimage, JAVA_BASE_NAME, get_jimage_version_string(), name, &size); 426 } else { 427 PackageEntry* package_entry = ClassLoader::get_package_entry(name, loader_data, CHECK_NULL); 428 if (package_entry != NULL) { 429 ResourceMark rm; 430 // Get the module name 431 ModuleEntry* module = package_entry->module(); 432 assert(module != NULL, "Boot classLoader package missing module"); 433 assert(module->is_named(), "Boot classLoader package is in unnamed module"); 434 const char* module_name = module->name()->as_C_string(); 435 if (module_name != NULL) { 436 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size); 437 } 438 } 439 } 440 } 441 } 442 if (location != 0) { 443 if (UsePerfData) { 444 ClassLoader::perf_sys_classfile_bytes_read()->inc(size); 445 } 446 char* data = NEW_RESOURCE_ARRAY(char, size); 447 (*JImageGetResource)(_jimage, location, data, size); 448 // Resource allocated 449 assert(this == (ClassPathImageEntry*)ClassLoader::get_jrt_entry(), "must be"); 450 return new ClassFileStream((u1*)data, 451 (int)size, 452 _name, 453 ClassFileStream::verify, 454 true); // from_boot_loader_modules_image 455 } 456 457 return NULL; 458 } 459 460 JImageLocationRef ClassLoader::jimage_find_resource(JImageFile* jf, 461 const char* module_name, 462 const char* file_name, 463 jlong &size) { 464 return ((*JImageFindResource)(jf, module_name, get_jimage_version_string(), file_name, &size)); 465 } 466 467 bool ClassPathImageEntry::is_modules_image() const { 468 assert(this == _singleton, "VM supports a single jimage"); 469 assert(this == (ClassPathImageEntry*)ClassLoader::get_jrt_entry(), "must be used for jrt entry"); 470 return true; 471 } 472 473 #if INCLUDE_CDS 474 void ClassLoader::exit_with_path_failure(const char* error, const char* message) { 475 assert(DumpSharedSpaces || DynamicDumpSharedSpaces, "only called at dump time"); 476 tty->print_cr("Hint: enable -Xlog:class+path=info to diagnose the failure"); 477 vm_exit_during_initialization(error, message); 478 } 479 #endif 480 481 ModuleClassPathList::ModuleClassPathList(Symbol* module_name) { 482 _module_name = module_name; 483 _module_first_entry = NULL; 484 _module_last_entry = NULL; 485 } 486 487 ModuleClassPathList::~ModuleClassPathList() { 488 // Clean out each ClassPathEntry on list 489 ClassPathEntry* e = _module_first_entry; 490 while (e != NULL) { 491 ClassPathEntry* next_entry = e->next(); 492 delete e; 493 e = next_entry; 494 } 495 } 496 497 void ModuleClassPathList::add_to_list(ClassPathEntry* new_entry) { 498 if (new_entry != NULL) { 499 if (_module_last_entry == NULL) { 500 _module_first_entry = _module_last_entry = new_entry; 501 } else { 502 _module_last_entry->set_next(new_entry); 503 _module_last_entry = new_entry; 504 } 505 } 506 } 507 508 void ClassLoader::trace_class_path(const char* msg, const char* name) { 509 LogTarget(Info, class, path) lt; 510 if (lt.is_enabled()) { 511 LogStream ls(lt); 512 if (msg) { 513 ls.print("%s", msg); 514 } 515 if (name) { 516 if (strlen(name) < 256) { 517 ls.print("%s", name); 518 } else { 519 // For very long paths, we need to print each character separately, 520 // as print_cr() has a length limit 521 while (name[0] != '\0') { 522 ls.print("%c", name[0]); 523 name++; 524 } 525 } 526 } 527 ls.cr(); 528 } 529 } 530 531 void ClassLoader::setup_bootstrap_search_path() { 532 const char* sys_class_path = Arguments::get_sysclasspath(); 533 assert(sys_class_path != NULL, "System boot class path must not be NULL"); 534 if (PrintSharedArchiveAndExit) { 535 // Don't print sys_class_path - this is the bootcp of this current VM process, not necessarily 536 // the same as the bootcp of the shared archive. 537 } else { 538 trace_class_path("bootstrap loader class path=", sys_class_path); 539 } 540 #if INCLUDE_CDS 541 if (DumpSharedSpaces || DynamicDumpSharedSpaces) { 542 _shared_paths_misc_info->add_boot_classpath(sys_class_path); 543 } 544 #endif 545 setup_boot_search_path(sys_class_path); 546 } 547 548 #if INCLUDE_CDS 549 int ClassLoader::get_shared_paths_misc_info_size() { 550 return _shared_paths_misc_info->get_used_bytes(); 551 } 552 553 void* ClassLoader::get_shared_paths_misc_info() { 554 return _shared_paths_misc_info->buffer(); 555 } 556 557 bool ClassLoader::check_shared_paths_misc_info(void *buf, int size, bool is_static) { 558 SharedPathsMiscInfo* checker = new SharedPathsMiscInfo((char*)buf, size); 559 bool result = checker->check(is_static); 560 delete checker; 561 return result; 562 } 563 564 void ClassLoader::setup_app_search_path(const char *class_path) { 565 assert(DumpSharedSpaces || DynamicDumpSharedSpaces, "Sanity"); 566 567 ResourceMark rm; 568 ClasspathStream cp_stream(class_path); 569 570 while (cp_stream.has_next()) { 571 const char* path = cp_stream.get_next(); 572 update_class_path_entry_list(path, false, false, false); 573 } 574 } 575 576 void ClassLoader::add_to_module_path_entries(const char* path, 577 ClassPathEntry* entry) { 578 assert(entry != NULL, "ClassPathEntry should not be NULL"); 579 assert(DumpSharedSpaces || DynamicDumpSharedSpaces, "dump time only"); 580 581 // The entry does not exist, add to the list 582 if (_module_path_entries == NULL) { 583 assert(_last_module_path_entry == NULL, "Sanity"); 584 _module_path_entries = _last_module_path_entry = entry; 585 } else { 586 _last_module_path_entry->set_next(entry); 587 _last_module_path_entry = entry; 588 } 589 } 590 591 // Add a module path to the _module_path_entries list. 592 void ClassLoader::update_module_path_entry_list(const char *path, TRAPS) { 593 assert(DumpSharedSpaces || DynamicDumpSharedSpaces, "dump time only"); 594 struct stat st; 595 if (os::stat(path, &st) != 0) { 596 tty->print_cr("os::stat error %d (%s). CDS dump aborted (path was \"%s\").", 597 errno, os::errno_name(errno), path); 598 vm_exit_during_initialization(); 599 } 600 // File or directory found 601 ClassPathEntry* new_entry = NULL; 602 new_entry = create_class_path_entry(path, &st, true /* throw_exception */, 603 false /*is_boot_append */, false /* from_class_path_attr */, CHECK); 604 if (new_entry == NULL) { 605 return; 606 } 607 608 add_to_module_path_entries(path, new_entry); 609 return; 610 } 611 612 void ClassLoader::setup_module_search_path(const char* path, TRAPS) { 613 update_module_path_entry_list(path, THREAD); 614 } 615 616 #endif // INCLUDE_CDS 617 618 void ClassLoader::close_jrt_image() { 619 // Not applicable for exploded builds 620 if (!ClassLoader::has_jrt_entry()) return; 621 _jrt_entry->close_jimage(); 622 } 623 624 // Construct the array of module/path pairs as specified to --patch-module 625 // for the boot loader to search ahead of the jimage, if the class being 626 // loaded is defined to a module that has been specified to --patch-module. 627 void ClassLoader::setup_patch_mod_entries() { 628 Thread* THREAD = Thread::current(); 629 GrowableArray<ModulePatchPath*>* patch_mod_args = Arguments::get_patch_mod_prefix(); 630 int num_of_entries = patch_mod_args->length(); 631 632 // Set up the boot loader's _patch_mod_entries list 633 _patch_mod_entries = new (ResourceObj::C_HEAP, mtModule) GrowableArray<ModuleClassPathList*>(num_of_entries, true); 634 635 for (int i = 0; i < num_of_entries; i++) { 636 const char* module_name = (patch_mod_args->at(i))->module_name(); 637 Symbol* const module_sym = SymbolTable::new_symbol(module_name); 638 assert(module_sym != NULL, "Failed to obtain Symbol for module name"); 639 ModuleClassPathList* module_cpl = new ModuleClassPathList(module_sym); 640 641 char* class_path = (patch_mod_args->at(i))->path_string(); 642 ResourceMark rm(THREAD); 643 ClasspathStream cp_stream(class_path); 644 645 while (cp_stream.has_next()) { 646 const char* path = cp_stream.get_next(); 647 struct stat st; 648 if (os::stat(path, &st) == 0) { 649 // File or directory found 650 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, false, CHECK); 651 // If the path specification is valid, enter it into this module's list 652 if (new_entry != NULL) { 653 module_cpl->add_to_list(new_entry); 654 } 655 } 656 } 657 658 // Record the module into the list of --patch-module entries only if 659 // valid ClassPathEntrys have been created 660 if (module_cpl->module_first_entry() != NULL) { 661 _patch_mod_entries->push(module_cpl); 662 } 663 } 664 } 665 666 // Determine whether the module has been patched via the command-line 667 // option --patch-module 668 bool ClassLoader::is_in_patch_mod_entries(Symbol* module_name) { 669 if (_patch_mod_entries != NULL && _patch_mod_entries->is_nonempty()) { 670 int table_len = _patch_mod_entries->length(); 671 for (int i = 0; i < table_len; i++) { 672 ModuleClassPathList* patch_mod = _patch_mod_entries->at(i); 673 if (module_name->fast_compare(patch_mod->module_name()) == 0) { 674 return true; 675 } 676 } 677 } 678 return false; 679 } 680 681 // Set up the _jrt_entry if present and boot append path 682 void ClassLoader::setup_boot_search_path(const char *class_path) { 683 EXCEPTION_MARK; 684 ResourceMark rm(THREAD); 685 ClasspathStream cp_stream(class_path); 686 bool set_base_piece = true; 687 688 #if INCLUDE_CDS 689 if (DumpSharedSpaces || DynamicDumpSharedSpaces) { 690 if (!Arguments::has_jimage()) { 691 vm_exit_during_initialization("CDS is not supported in exploded JDK build", NULL); 692 } 693 } 694 #endif 695 696 while (cp_stream.has_next()) { 697 const char* path = cp_stream.get_next(); 698 699 if (set_base_piece) { 700 // The first time through the bootstrap_search setup, it must be determined 701 // what the base or core piece of the boot loader search is. Either a java runtime 702 // image is present or this is an exploded module build situation. 703 assert(string_ends_with(path, MODULES_IMAGE_NAME) || string_ends_with(path, JAVA_BASE_NAME), 704 "Incorrect boot loader search path, no java runtime image or " JAVA_BASE_NAME " exploded build"); 705 struct stat st; 706 if (os::stat(path, &st) == 0) { 707 // Directory found 708 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, false, CHECK); 709 710 // Check for a jimage 711 if (Arguments::has_jimage()) { 712 assert(_jrt_entry == NULL, "should not setup bootstrap class search path twice"); 713 _jrt_entry = new_entry; 714 assert(new_entry != NULL && new_entry->is_modules_image(), "No java runtime image present"); 715 assert(_jrt_entry->jimage() != NULL, "No java runtime image"); 716 } 717 } else { 718 // If path does not exist, exit 719 vm_exit_during_initialization("Unable to establish the boot loader search path", path); 720 } 721 set_base_piece = false; 722 } else { 723 // Every entry on the system boot class path after the initial base piece, 724 // which is set by os::set_boot_path(), is considered an appended entry. 725 update_class_path_entry_list(path, false, true, false); 726 } 727 } 728 } 729 730 // During an exploded modules build, each module defined to the boot loader 731 // will be added to the ClassLoader::_exploded_entries array. 732 void ClassLoader::add_to_exploded_build_list(Symbol* module_sym, TRAPS) { 733 assert(!ClassLoader::has_jrt_entry(), "Exploded build not applicable"); 734 assert(_exploded_entries != NULL, "_exploded_entries was not initialized"); 735 736 // Find the module's symbol 737 ResourceMark rm(THREAD); 738 const char *module_name = module_sym->as_C_string(); 739 const char *home = Arguments::get_java_home(); 740 const char file_sep = os::file_separator()[0]; 741 // 10 represents the length of "modules" + 2 file separators + \0 742 size_t len = strlen(home) + strlen(module_name) + 10; 743 char *path = NEW_RESOURCE_ARRAY(char, len); 744 jio_snprintf(path, len, "%s%cmodules%c%s", home, file_sep, file_sep, module_name); 745 746 struct stat st; 747 if (os::stat(path, &st) == 0) { 748 // Directory found 749 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, false, CHECK); 750 751 // If the path specification is valid, enter it into this module's list. 752 // There is no need to check for duplicate modules in the exploded entry list, 753 // since no two modules with the same name can be defined to the boot loader. 754 // This is checked at module definition time in Modules::define_module. 755 if (new_entry != NULL) { 756 ModuleClassPathList* module_cpl = new ModuleClassPathList(module_sym); 757 module_cpl->add_to_list(new_entry); 758 { 759 MutexLocker ml(Module_lock, THREAD); 760 _exploded_entries->push(module_cpl); 761 } 762 log_info(class, load)("path: %s", path); 763 } 764 } 765 } 766 767 ClassPathEntry* ClassLoader::create_class_path_entry(const char *path, const struct stat* st, 768 bool throw_exception, 769 bool is_boot_append, 770 bool from_class_path_attr, 771 TRAPS) { 772 JavaThread* thread = JavaThread::current(); 773 ClassPathEntry* new_entry = NULL; 774 if ((st->st_mode & S_IFMT) == S_IFREG) { 775 ResourceMark rm(thread); 776 // Regular file, should be a zip or jimage file 777 // Canonicalized filename 778 char* canonical_path = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, JVM_MAXPATHLEN); 779 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 780 // This matches the classic VM 781 if (throw_exception) { 782 THROW_MSG_(vmSymbols::java_io_IOException(), "Bad pathname", NULL); 783 } else { 784 return NULL; 785 } 786 } 787 jint error; 788 JImageFile* jimage =(*JImageOpen)(canonical_path, &error); 789 if (jimage != NULL) { 790 new_entry = new ClassPathImageEntry(jimage, canonical_path); 791 } else { 792 char* error_msg = NULL; 793 jzfile* zip; 794 { 795 // enable call to C land 796 ThreadToNativeFromVM ttn(thread); 797 HandleMark hm(thread); 798 zip = (*ZipOpen)(canonical_path, &error_msg); 799 } 800 if (zip != NULL && error_msg == NULL) { 801 new_entry = new ClassPathZipEntry(zip, path, is_boot_append, from_class_path_attr); 802 } else { 803 char *msg; 804 if (error_msg == NULL) { 805 msg = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, strlen(path) + 128); ; 806 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path); 807 } else { 808 int len = (int)(strlen(path) + strlen(error_msg) + 128); 809 msg = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, len); ; 810 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path); 811 } 812 // Don't complain about bad jar files added via -Xbootclasspath/a:. 813 if (throw_exception && is_init_completed()) { 814 THROW_MSG_(vmSymbols::java_lang_ClassNotFoundException(), msg, NULL); 815 } else { 816 return NULL; 817 } 818 } 819 } 820 log_info(class, path)("opened: %s", path); 821 log_info(class, load)("opened: %s", path); 822 } else { 823 // Directory 824 new_entry = new ClassPathDirEntry(path); 825 log_info(class, load)("path: %s", path); 826 } 827 return new_entry; 828 } 829 830 831 // Create a class path zip entry for a given path (return NULL if not found 832 // or zip/JAR file cannot be opened) 833 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path, bool is_boot_append) { 834 // check for a regular file 835 struct stat st; 836 if (os::stat(path, &st) == 0) { 837 if ((st.st_mode & S_IFMT) == S_IFREG) { 838 char canonical_path[JVM_MAXPATHLEN]; 839 if (get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 840 char* error_msg = NULL; 841 jzfile* zip; 842 { 843 // enable call to C land 844 JavaThread* thread = JavaThread::current(); 845 ThreadToNativeFromVM ttn(thread); 846 HandleMark hm(thread); 847 zip = (*ZipOpen)(canonical_path, &error_msg); 848 } 849 if (zip != NULL && error_msg == NULL) { 850 // create using canonical path 851 return new ClassPathZipEntry(zip, canonical_path, is_boot_append, false); 852 } 853 } 854 } 855 } 856 return NULL; 857 } 858 859 // returns true if entry already on class path 860 bool ClassLoader::contains_append_entry(const char* name) { 861 ClassPathEntry* e = _first_append_entry; 862 while (e != NULL) { 863 // assume zip entries have been canonicalized 864 if (strcmp(name, e->name()) == 0) { 865 return true; 866 } 867 e = e->next(); 868 } 869 return false; 870 } 871 872 void ClassLoader::add_to_boot_append_entries(ClassPathEntry *new_entry) { 873 if (new_entry != NULL) { 874 if (_last_append_entry == NULL) { 875 assert(_first_append_entry == NULL, "boot loader's append class path entry list not empty"); 876 _first_append_entry = _last_append_entry = new_entry; 877 } else { 878 _last_append_entry->set_next(new_entry); 879 _last_append_entry = new_entry; 880 } 881 } 882 } 883 884 // Record the path entries specified in -cp during dump time. The recorded 885 // information will be used at runtime for loading the archived app classes. 886 // 887 // Note that at dump time, ClassLoader::_app_classpath_entries are NOT used for 888 // loading app classes. Instead, the app class are loaded by the 889 // jdk/internal/loader/ClassLoaders$AppClassLoader instance. 890 void ClassLoader::add_to_app_classpath_entries(const char* path, 891 ClassPathEntry* entry, 892 bool check_for_duplicates) { 893 #if INCLUDE_CDS 894 assert(entry != NULL, "ClassPathEntry should not be NULL"); 895 ClassPathEntry* e = _app_classpath_entries; 896 if (check_for_duplicates) { 897 while (e != NULL) { 898 if (strcmp(e->name(), entry->name()) == 0) { 899 // entry already exists 900 return; 901 } 902 e = e->next(); 903 } 904 } 905 906 // The entry does not exist, add to the list 907 if (_app_classpath_entries == NULL) { 908 assert(_last_app_classpath_entry == NULL, "Sanity"); 909 _app_classpath_entries = _last_app_classpath_entry = entry; 910 } else { 911 _last_app_classpath_entry->set_next(entry); 912 _last_app_classpath_entry = entry; 913 } 914 915 if (entry->is_jar_file()) { 916 ClassLoaderExt::process_jar_manifest(entry, check_for_duplicates); 917 } 918 #endif 919 } 920 921 // Returns true IFF the file/dir exists and the entry was successfully created. 922 bool ClassLoader::update_class_path_entry_list(const char *path, 923 bool check_for_duplicates, 924 bool is_boot_append, 925 bool from_class_path_attr, 926 bool throw_exception) { 927 struct stat st; 928 if (os::stat(path, &st) == 0) { 929 // File or directory found 930 ClassPathEntry* new_entry = NULL; 931 Thread* THREAD = Thread::current(); 932 new_entry = create_class_path_entry(path, &st, throw_exception, is_boot_append, from_class_path_attr, CHECK_(false)); 933 if (new_entry == NULL) { 934 return false; 935 } 936 937 // Do not reorder the bootclasspath which would break get_system_package(). 938 // Add new entry to linked list 939 if (is_boot_append) { 940 add_to_boot_append_entries(new_entry); 941 } else { 942 add_to_app_classpath_entries(path, new_entry, check_for_duplicates); 943 } 944 return true; 945 } else { 946 #if INCLUDE_CDS 947 if (DumpSharedSpaces || DynamicDumpSharedSpaces) { 948 _shared_paths_misc_info->add_nonexist_path(path); 949 } 950 #endif 951 return false; 952 } 953 } 954 955 static void print_module_entry_table(const GrowableArray<ModuleClassPathList*>* const module_list) { 956 ResourceMark rm; 957 int num_of_entries = module_list->length(); 958 for (int i = 0; i < num_of_entries; i++) { 959 ClassPathEntry* e; 960 ModuleClassPathList* mpl = module_list->at(i); 961 tty->print("%s=", mpl->module_name()->as_C_string()); 962 e = mpl->module_first_entry(); 963 while (e != NULL) { 964 tty->print("%s", e->name()); 965 e = e->next(); 966 if (e != NULL) { 967 tty->print("%s", os::path_separator()); 968 } 969 } 970 tty->print(" ;"); 971 } 972 } 973 974 void ClassLoader::print_bootclasspath() { 975 ClassPathEntry* e; 976 tty->print("[bootclasspath= "); 977 978 // Print --patch-module module/path specifications first 979 if (_patch_mod_entries != NULL) { 980 print_module_entry_table(_patch_mod_entries); 981 } 982 983 // [jimage | exploded modules build] 984 if (has_jrt_entry()) { 985 // Print the location of the java runtime image 986 tty->print("%s ;", _jrt_entry->name()); 987 } else { 988 // Print exploded module build path specifications 989 if (_exploded_entries != NULL) { 990 print_module_entry_table(_exploded_entries); 991 } 992 } 993 994 // appended entries 995 e = _first_append_entry; 996 while (e != NULL) { 997 tty->print("%s ;", e->name()); 998 e = e->next(); 999 } 1000 tty->print_cr("]"); 1001 } 1002 1003 void ClassLoader::load_zip_library() { 1004 assert(ZipOpen == NULL, "should not load zip library twice"); 1005 // First make sure native library is loaded 1006 os::native_java_library(); 1007 // Load zip library 1008 char path[JVM_MAXPATHLEN]; 1009 char ebuf[1024]; 1010 void* handle = NULL; 1011 if (os::dll_locate_lib(path, sizeof(path), Arguments::get_dll_dir(), "zip")) { 1012 handle = os::dll_load(path, ebuf, sizeof ebuf); 1013 } 1014 if (handle == NULL) { 1015 vm_exit_during_initialization("Unable to load ZIP library", path); 1016 } 1017 // Lookup zip entry points 1018 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open")); 1019 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close")); 1020 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry")); 1021 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry")); 1022 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry")); 1023 ZipInflateFully = CAST_TO_FN_PTR(ZipInflateFully_t, os::dll_lookup(handle, "ZIP_InflateFully")); 1024 Crc32 = CAST_TO_FN_PTR(Crc32_t, os::dll_lookup(handle, "ZIP_CRC32")); 1025 1026 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL 1027 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || 1028 GetNextEntry == NULL || Crc32 == NULL) { 1029 vm_exit_during_initialization("Corrupted ZIP library", path); 1030 } 1031 1032 if (ZipInflateFully == NULL) { 1033 vm_exit_during_initialization("Corrupted ZIP library ZIP_InflateFully missing", path); 1034 } 1035 1036 // Lookup canonicalize entry in libjava.dll 1037 void *javalib_handle = os::native_java_library(); 1038 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize")); 1039 // This lookup only works on 1.3. Do not check for non-null here 1040 } 1041 1042 void ClassLoader::load_jimage_library() { 1043 // First make sure native library is loaded 1044 os::native_java_library(); 1045 // Load jimage library 1046 char path[JVM_MAXPATHLEN]; 1047 char ebuf[1024]; 1048 void* handle = NULL; 1049 if (os::dll_locate_lib(path, sizeof(path), Arguments::get_dll_dir(), "jimage")) { 1050 handle = os::dll_load(path, ebuf, sizeof ebuf); 1051 } 1052 if (handle == NULL) { 1053 vm_exit_during_initialization("Unable to load jimage library", path); 1054 } 1055 1056 // Lookup jimage entry points 1057 JImageOpen = CAST_TO_FN_PTR(JImageOpen_t, os::dll_lookup(handle, "JIMAGE_Open")); 1058 guarantee(JImageOpen != NULL, "function JIMAGE_Open not found"); 1059 JImageClose = CAST_TO_FN_PTR(JImageClose_t, os::dll_lookup(handle, "JIMAGE_Close")); 1060 guarantee(JImageClose != NULL, "function JIMAGE_Close not found"); 1061 JImagePackageToModule = CAST_TO_FN_PTR(JImagePackageToModule_t, os::dll_lookup(handle, "JIMAGE_PackageToModule")); 1062 guarantee(JImagePackageToModule != NULL, "function JIMAGE_PackageToModule not found"); 1063 JImageFindResource = CAST_TO_FN_PTR(JImageFindResource_t, os::dll_lookup(handle, "JIMAGE_FindResource")); 1064 guarantee(JImageFindResource != NULL, "function JIMAGE_FindResource not found"); 1065 JImageGetResource = CAST_TO_FN_PTR(JImageGetResource_t, os::dll_lookup(handle, "JIMAGE_GetResource")); 1066 guarantee(JImageGetResource != NULL, "function JIMAGE_GetResource not found"); 1067 JImageResourceIterator = CAST_TO_FN_PTR(JImageResourceIterator_t, os::dll_lookup(handle, "JIMAGE_ResourceIterator")); 1068 guarantee(JImageResourceIterator != NULL, "function JIMAGE_ResourceIterator not found"); 1069 } 1070 1071 jboolean ClassLoader::decompress(void *in, u8 inSize, void *out, u8 outSize, char **pmsg) { 1072 return (*ZipInflateFully)(in, inSize, out, outSize, pmsg); 1073 } 1074 1075 int ClassLoader::crc32(int crc, const char* buf, int len) { 1076 assert(Crc32 != NULL, "ZIP_CRC32 is not found"); 1077 return (*Crc32)(crc, (const jbyte*)buf, len); 1078 } 1079 1080 // Function add_package extracts the package from the fully qualified class name 1081 // and checks if the package is in the boot loader's package entry table. If so, 1082 // then it sets the classpath_index in the package entry record. 1083 // 1084 // The classpath_index field is used to find the entry on the boot loader class 1085 // path for packages with classes loaded by the boot loader from -Xbootclasspath/a 1086 // in an unnamed module. It is also used to indicate (for all packages whose 1087 // classes are loaded by the boot loader) that at least one of the package's 1088 // classes has been loaded. 1089 bool ClassLoader::add_package(const char *fullq_class_name, s2 classpath_index, TRAPS) { 1090 assert(fullq_class_name != NULL, "just checking"); 1091 1092 // Get package name from fully qualified class name. 1093 ResourceMark rm; 1094 const char *cp = package_from_name(fullq_class_name); 1095 if (cp != NULL) { 1096 PackageEntryTable* pkg_entry_tbl = ClassLoaderData::the_null_class_loader_data()->packages(); 1097 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(cp); 1098 PackageEntry* pkg_entry = pkg_entry_tbl->lookup_only(pkg_symbol); 1099 if (pkg_entry != NULL) { 1100 assert(classpath_index != -1, "Unexpected classpath_index"); 1101 pkg_entry->set_classpath_index(classpath_index); 1102 } else { 1103 return false; 1104 } 1105 } 1106 return true; 1107 } 1108 1109 oop ClassLoader::get_system_package(const char* name, TRAPS) { 1110 // Look up the name in the boot loader's package entry table. 1111 if (name != NULL) { 1112 TempNewSymbol package_sym = SymbolTable::new_symbol(name); 1113 // Look for the package entry in the boot loader's package entry table. 1114 PackageEntry* package = 1115 ClassLoaderData::the_null_class_loader_data()->packages()->lookup_only(package_sym); 1116 1117 // Return NULL if package does not exist or if no classes in that package 1118 // have been loaded. 1119 if (package != NULL && package->has_loaded_class()) { 1120 ModuleEntry* module = package->module(); 1121 if (module->location() != NULL) { 1122 ResourceMark rm(THREAD); 1123 Handle ml = java_lang_String::create_from_str( 1124 module->location()->as_C_string(), THREAD); 1125 return ml(); 1126 } 1127 // Return entry on boot loader class path. 1128 Handle cph = java_lang_String::create_from_str( 1129 ClassLoader::classpath_entry(package->classpath_index())->name(), THREAD); 1130 return cph(); 1131 } 1132 } 1133 return NULL; 1134 } 1135 1136 objArrayOop ClassLoader::get_system_packages(TRAPS) { 1137 ResourceMark rm(THREAD); 1138 // List of pointers to PackageEntrys that have loaded classes. 1139 GrowableArray<PackageEntry*>* loaded_class_pkgs = new GrowableArray<PackageEntry*>(50); 1140 { 1141 MutexLocker ml(Module_lock, THREAD); 1142 1143 PackageEntryTable* pe_table = 1144 ClassLoaderData::the_null_class_loader_data()->packages(); 1145 1146 // Collect the packages that have at least one loaded class. 1147 for (int x = 0; x < pe_table->table_size(); x++) { 1148 for (PackageEntry* package_entry = pe_table->bucket(x); 1149 package_entry != NULL; 1150 package_entry = package_entry->next()) { 1151 if (package_entry->has_loaded_class()) { 1152 loaded_class_pkgs->append(package_entry); 1153 } 1154 } 1155 } 1156 } 1157 1158 1159 // Allocate objArray and fill with java.lang.String 1160 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 1161 loaded_class_pkgs->length(), CHECK_NULL); 1162 objArrayHandle result(THREAD, r); 1163 for (int x = 0; x < loaded_class_pkgs->length(); x++) { 1164 PackageEntry* package_entry = loaded_class_pkgs->at(x); 1165 Handle str = java_lang_String::create_from_symbol(package_entry->name(), CHECK_NULL); 1166 result->obj_at_put(x, str()); 1167 } 1168 return result(); 1169 } 1170 1171 // caller needs ResourceMark 1172 const char* ClassLoader::file_name_for_class_name(const char* class_name, 1173 int class_name_len) { 1174 assert(class_name != NULL, "invariant"); 1175 assert((int)strlen(class_name) == class_name_len, "invariant"); 1176 1177 static const char class_suffix[] = ".class"; 1178 size_t class_suffix_len = sizeof(class_suffix); 1179 1180 char* const file_name = NEW_RESOURCE_ARRAY(char, 1181 class_name_len + 1182 class_suffix_len); // includes term NULL 1183 1184 strncpy(file_name, class_name, class_name_len); 1185 strncpy(&file_name[class_name_len], class_suffix, class_suffix_len); 1186 1187 return file_name; 1188 } 1189 1190 ClassPathEntry* find_first_module_cpe(ModuleEntry* mod_entry, 1191 const GrowableArray<ModuleClassPathList*>* const module_list) { 1192 int num_of_entries = module_list->length(); 1193 const Symbol* class_module_name = mod_entry->name(); 1194 1195 // Loop through all the modules in either the patch-module or exploded entries looking for module 1196 for (int i = 0; i < num_of_entries; i++) { 1197 ModuleClassPathList* module_cpl = module_list->at(i); 1198 Symbol* module_cpl_name = module_cpl->module_name(); 1199 1200 if (module_cpl_name->fast_compare(class_module_name) == 0) { 1201 // Class' module has been located. 1202 return module_cpl->module_first_entry(); 1203 } 1204 } 1205 return NULL; 1206 } 1207 1208 1209 // Search either the patch-module or exploded build entries for class. 1210 ClassFileStream* ClassLoader::search_module_entries(const GrowableArray<ModuleClassPathList*>* const module_list, 1211 const char* const class_name, 1212 const char* const file_name, 1213 TRAPS) { 1214 ClassFileStream* stream = NULL; 1215 1216 // Find the class' defining module in the boot loader's module entry table 1217 PackageEntry* pkg_entry = get_package_entry(class_name, ClassLoaderData::the_null_class_loader_data(), CHECK_NULL); 1218 ModuleEntry* mod_entry = (pkg_entry != NULL) ? pkg_entry->module() : NULL; 1219 1220 // If the module system has not defined java.base yet, then 1221 // classes loaded are assumed to be defined to java.base. 1222 // When java.base is eventually defined by the module system, 1223 // all packages of classes that have been previously loaded 1224 // are verified in ModuleEntryTable::verify_javabase_packages(). 1225 if (!Universe::is_module_initialized() && 1226 !ModuleEntryTable::javabase_defined() && 1227 mod_entry == NULL) { 1228 mod_entry = ModuleEntryTable::javabase_moduleEntry(); 1229 } 1230 1231 // The module must be a named module 1232 ClassPathEntry* e = NULL; 1233 if (mod_entry != NULL && mod_entry->is_named()) { 1234 if (module_list == _exploded_entries) { 1235 // The exploded build entries can be added to at any time so a lock is 1236 // needed when searching them. 1237 assert(!ClassLoader::has_jrt_entry(), "Must be exploded build"); 1238 MutexLocker ml(Module_lock, THREAD); 1239 e = find_first_module_cpe(mod_entry, module_list); 1240 } else { 1241 e = find_first_module_cpe(mod_entry, module_list); 1242 } 1243 } 1244 1245 // Try to load the class from the module's ClassPathEntry list. 1246 while (e != NULL) { 1247 stream = e->open_stream(file_name, CHECK_NULL); 1248 // No context.check is required since CDS is not supported 1249 // for an exploded modules build or if --patch-module is specified. 1250 if (NULL != stream) { 1251 return stream; 1252 } 1253 e = e->next(); 1254 } 1255 // If the module was located, break out even if the class was not 1256 // located successfully from that module's ClassPathEntry list. 1257 // There will not be another valid entry for that module. 1258 return NULL; 1259 } 1260 1261 // Called by the boot classloader to load classes 1262 InstanceKlass* ClassLoader::load_class(Symbol* name, bool search_append_only, TRAPS) { 1263 assert(name != NULL, "invariant"); 1264 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 1265 1266 ResourceMark rm(THREAD); 1267 HandleMark hm(THREAD); 1268 1269 const char* const class_name = name->as_C_string(); 1270 1271 EventMark m("loading class %s", class_name); 1272 1273 const char* const file_name = file_name_for_class_name(class_name, 1274 name->utf8_length()); 1275 assert(file_name != NULL, "invariant"); 1276 1277 // Lookup stream for parsing .class file 1278 ClassFileStream* stream = NULL; 1279 s2 classpath_index = 0; 1280 ClassPathEntry* e = NULL; 1281 1282 // If search_append_only is true, boot loader visibility boundaries are 1283 // set to be _first_append_entry to the end. This includes: 1284 // [-Xbootclasspath/a]; [jvmti appended entries] 1285 // 1286 // If search_append_only is false, boot loader visibility boundaries are 1287 // set to be the --patch-module entries plus the base piece. This includes: 1288 // [--patch-module=<module>=<file>(<pathsep><file>)*]; [jimage | exploded module build] 1289 // 1290 1291 // Load Attempt #1: --patch-module 1292 // Determine the class' defining module. If it appears in the _patch_mod_entries, 1293 // attempt to load the class from those locations specific to the module. 1294 // Specifications to --patch-module can contain a partial number of classes 1295 // that are part of the overall module definition. So if a particular class is not 1296 // found within its module specification, the search should continue to Load Attempt #2. 1297 // Note: The --patch-module entries are never searched if the boot loader's 1298 // visibility boundary is limited to only searching the append entries. 1299 if (_patch_mod_entries != NULL && !search_append_only) { 1300 // At CDS dump time, the --patch-module entries are ignored. That means a 1301 // class is still loaded from the runtime image even if it might 1302 // appear in the _patch_mod_entries. The runtime shared class visibility 1303 // check will determine if a shared class is visible based on the runtime 1304 // environemnt, including the runtime --patch-module setting. 1305 // 1306 // DynamicDumpSharedSpaces requires UseSharedSpaces to be enabled. Since --patch-module 1307 // is not supported with UseSharedSpaces, it is not supported with DynamicDumpSharedSpaces. 1308 assert(!DynamicDumpSharedSpaces, "sanity"); 1309 if (!DumpSharedSpaces) { 1310 stream = search_module_entries(_patch_mod_entries, class_name, file_name, CHECK_NULL); 1311 } 1312 } 1313 1314 // Load Attempt #2: [jimage | exploded build] 1315 if (!search_append_only && (NULL == stream)) { 1316 if (has_jrt_entry()) { 1317 e = _jrt_entry; 1318 stream = _jrt_entry->open_stream(file_name, CHECK_NULL); 1319 } else { 1320 // Exploded build - attempt to locate class in its defining module's location. 1321 assert(_exploded_entries != NULL, "No exploded build entries present"); 1322 stream = search_module_entries(_exploded_entries, class_name, file_name, CHECK_NULL); 1323 } 1324 } 1325 1326 // Load Attempt #3: [-Xbootclasspath/a]; [jvmti appended entries] 1327 if (search_append_only && (NULL == stream)) { 1328 // For the boot loader append path search, the starting classpath_index 1329 // for the appended piece is always 1 to account for either the 1330 // _jrt_entry or the _exploded_entries. 1331 assert(classpath_index == 0, "The classpath_index has been incremented incorrectly"); 1332 classpath_index = 1; 1333 1334 e = _first_append_entry; 1335 while (e != NULL) { 1336 stream = e->open_stream(file_name, CHECK_NULL); 1337 if (NULL != stream) { 1338 break; 1339 } 1340 e = e->next(); 1341 ++classpath_index; 1342 } 1343 } 1344 1345 if (NULL == stream) { 1346 return NULL; 1347 } 1348 1349 stream->set_verify(ClassLoaderExt::should_verify(classpath_index)); 1350 1351 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); 1352 Handle protection_domain; 1353 1354 InstanceKlass* result = KlassFactory::create_from_stream(stream, 1355 name, 1356 loader_data, 1357 protection_domain, 1358 NULL, // unsafe_anonymous_host 1359 NULL, // cp_patches 1360 THREAD); 1361 if (HAS_PENDING_EXCEPTION) { 1362 if (DumpSharedSpaces) { 1363 tty->print_cr("Preload Error: Failed to load %s", class_name); 1364 } 1365 return NULL; 1366 } 1367 1368 if (!add_package(file_name, classpath_index, THREAD)) { 1369 return NULL; 1370 } 1371 1372 return result; 1373 } 1374 1375 #if INCLUDE_CDS 1376 char* ClassLoader::skip_uri_protocol(char* source) { 1377 if (strncmp(source, "file:", 5) == 0) { 1378 // file: protocol path could start with file:/ or file:/// 1379 // locate the char after all the forward slashes 1380 int offset = 5; 1381 while (*(source + offset) == '/') { 1382 offset++; 1383 } 1384 source += offset; 1385 // for non-windows platforms, move back one char as the path begins with a '/' 1386 #ifndef _WINDOWS 1387 source -= 1; 1388 #endif 1389 } else if (strncmp(source, "jrt:/", 5) == 0) { 1390 source += 5; 1391 } 1392 return source; 1393 } 1394 1395 // Record the shared classpath index and loader type for classes loaded 1396 // by the builtin loaders at dump time. 1397 void ClassLoader::record_result(InstanceKlass* ik, const ClassFileStream* stream, TRAPS) { 1398 assert(DumpSharedSpaces || DynamicDumpSharedSpaces, "sanity"); 1399 assert(stream != NULL, "sanity"); 1400 1401 if (ik->is_unsafe_anonymous()) { 1402 // We do not archive unsafe anonymous classes. 1403 return; 1404 } 1405 1406 oop loader = ik->class_loader(); 1407 char* src = (char*)stream->source(); 1408 if (src == NULL) { 1409 if (loader == NULL) { 1410 // JFR classes 1411 ik->set_shared_classpath_index(0); 1412 ik->set_class_loader_type(ClassLoader::BOOT_LOADER); 1413 } 1414 return; 1415 } 1416 1417 assert(has_jrt_entry(), "CDS dumping does not support exploded JDK build"); 1418 1419 ResourceMark rm(THREAD); 1420 int classpath_index = -1; 1421 PackageEntry* pkg_entry = ik->package(); 1422 1423 if (FileMapInfo::get_number_of_shared_paths() > 0) { 1424 char* canonical_path_table_entry = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JVM_MAXPATHLEN); 1425 1426 // save the path from the file: protocol or the module name from the jrt: protocol 1427 // if no protocol prefix is found, path is the same as stream->source() 1428 char* path = skip_uri_protocol(src); 1429 char* canonical_class_src_path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JVM_MAXPATHLEN); 1430 bool success = get_canonical_path(path, canonical_class_src_path, JVM_MAXPATHLEN); 1431 // The path is from the ClassFileStream. Since a ClassFileStream has been created successfully in functions 1432 // such as ClassLoader::load_class(), its source path must be valid. 1433 assert(success, "must be valid path"); 1434 for (int i = 0; i < FileMapInfo::get_number_of_shared_paths(); i++) { 1435 SharedClassPathEntry* ent = FileMapInfo::shared_path(i); 1436 success = get_canonical_path(ent->name(), canonical_path_table_entry, JVM_MAXPATHLEN); 1437 // A shared path has been validated during its creation in ClassLoader::create_class_path_entry(), 1438 // it must be valid here. 1439 assert(success, "must be valid path"); 1440 // If the path (from the class stream source) is the same as the shared 1441 // class or module path, then we have a match. 1442 if (strcmp(canonical_path_table_entry, canonical_class_src_path) == 0) { 1443 // NULL pkg_entry and pkg_entry in an unnamed module implies the class 1444 // is from the -cp or boot loader append path which consists of -Xbootclasspath/a 1445 // and jvmti appended entries. 1446 if ((pkg_entry == NULL) || (pkg_entry->in_unnamed_module())) { 1447 // Ensure the index is within the -cp range before assigning 1448 // to the classpath_index. 1449 if (SystemDictionary::is_system_class_loader(loader) && 1450 (i >= ClassLoaderExt::app_class_paths_start_index()) && 1451 (i < ClassLoaderExt::app_module_paths_start_index())) { 1452 classpath_index = i; 1453 break; 1454 } else { 1455 if ((i >= 1) && 1456 (i < ClassLoaderExt::app_class_paths_start_index())) { 1457 // The class must be from boot loader append path which consists of 1458 // -Xbootclasspath/a and jvmti appended entries. 1459 assert(loader == NULL, "sanity"); 1460 classpath_index = i; 1461 break; 1462 } 1463 } 1464 } else { 1465 // A class from a named module from the --module-path. Ensure the index is 1466 // within the --module-path range before assigning to the classpath_index. 1467 if ((pkg_entry != NULL) && !(pkg_entry->in_unnamed_module()) && (i > 0)) { 1468 if (i >= ClassLoaderExt::app_module_paths_start_index() && 1469 i < FileMapInfo::get_number_of_shared_paths()) { 1470 classpath_index = i; 1471 break; 1472 } 1473 } 1474 } 1475 } 1476 // for index 0 and the stream->source() is the modules image or has the jrt: protocol. 1477 // The class must be from the runtime modules image. 1478 if (i == 0 && (stream->from_boot_loader_modules_image() || string_starts_with(src, "jrt:"))) { 1479 classpath_index = i; 1480 break; 1481 } 1482 } 1483 1484 // No path entry found for this class. Must be a shared class loaded by the 1485 // user defined classloader. 1486 if (classpath_index < 0) { 1487 assert(ik->shared_classpath_index() < 0, "Sanity"); 1488 ik->set_shared_classpath_index(UNREGISTERED_INDEX); 1489 SystemDictionaryShared::set_shared_class_misc_info(ik, (ClassFileStream*)stream); 1490 return; 1491 } 1492 } else { 1493 // The shared path table is set up after module system initialization. 1494 // The path table contains no entry before that. Any classes loaded prior 1495 // to the setup of the shared path table must be from the modules image. 1496 assert(stream->from_boot_loader_modules_image(), "stream must be loaded by boot loader from modules image"); 1497 assert(FileMapInfo::get_number_of_shared_paths() == 0, "shared path table must not have been setup"); 1498 classpath_index = 0; 1499 } 1500 1501 const char* const class_name = ik->name()->as_C_string(); 1502 const char* const file_name = file_name_for_class_name(class_name, 1503 ik->name()->utf8_length()); 1504 assert(file_name != NULL, "invariant"); 1505 1506 ClassLoaderExt::record_result(classpath_index, ik, THREAD); 1507 } 1508 #endif // INCLUDE_CDS 1509 1510 // Initialize the class loader's access to methods in libzip. Parse and 1511 // process the boot classpath into a list ClassPathEntry objects. Once 1512 // this list has been created, it must not change order (see class PackageInfo) 1513 // it can be appended to and is by jvmti and the kernel vm. 1514 1515 void ClassLoader::initialize() { 1516 EXCEPTION_MARK; 1517 1518 if (UsePerfData) { 1519 // jvmstat performance counters 1520 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time"); 1521 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime"); 1522 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self"); 1523 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime"); 1524 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self"); 1525 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime"); 1526 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self"); 1527 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses"); 1528 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses"); 1529 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses"); 1530 1531 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime"); 1532 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self"); 1533 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime"); 1534 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime"); 1535 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime"); 1536 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime"); 1537 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self"); 1538 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount"); 1539 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses"); 1540 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime"); 1541 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self"); 1542 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes"); 1543 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes"); 1544 1545 1546 // The following performance counters are added for measuring the impact 1547 // of the bug fix of 6365597. They are mainly focused on finding out 1548 // the behavior of system & user-defined classloader lock, whether 1549 // ClassLoader.loadClass/findClass is being called synchronized or not. 1550 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS, 1551 "systemLoaderLockContentionRate"); 1552 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS, 1553 "nonSystemLoaderLockContentionRate"); 1554 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS, 1555 "jvmFindLoadedClassNoLockCalls"); 1556 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS, 1557 "jvmDefineClassNoLockCalls"); 1558 1559 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS, 1560 "jniDefineClassNoLockCalls"); 1561 1562 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS, 1563 "unsafeDefineClassCalls"); 1564 } 1565 1566 // lookup zip library entry points 1567 load_zip_library(); 1568 // lookup jimage library entry points 1569 load_jimage_library(); 1570 #if INCLUDE_CDS 1571 // initialize search path 1572 if (DumpSharedSpaces || DynamicDumpSharedSpaces) { 1573 _shared_paths_misc_info = new SharedPathsMiscInfo(); 1574 } 1575 #endif 1576 setup_bootstrap_search_path(); 1577 } 1578 1579 #if INCLUDE_CDS 1580 void ClassLoader::initialize_shared_path() { 1581 if (DumpSharedSpaces || DynamicDumpSharedSpaces) { 1582 ClassLoaderExt::setup_search_paths(); 1583 _shared_paths_misc_info->write_jint(0); // see comments in SharedPathsMiscInfo::check() 1584 } 1585 } 1586 1587 void ClassLoader::initialize_module_path(TRAPS) { 1588 if (DumpSharedSpaces || DynamicDumpSharedSpaces) { 1589 ClassLoaderExt::setup_module_paths(THREAD); 1590 FileMapInfo::allocate_shared_path_table(); 1591 } 1592 } 1593 #endif 1594 1595 jlong ClassLoader::classloader_time_ms() { 1596 return UsePerfData ? 1597 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1; 1598 } 1599 1600 jlong ClassLoader::class_init_count() { 1601 return UsePerfData ? _perf_classes_inited->get_value() : -1; 1602 } 1603 1604 jlong ClassLoader::class_init_time_ms() { 1605 return UsePerfData ? 1606 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1; 1607 } 1608 1609 jlong ClassLoader::class_verify_time_ms() { 1610 return UsePerfData ? 1611 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1; 1612 } 1613 1614 jlong ClassLoader::class_link_count() { 1615 return UsePerfData ? _perf_classes_linked->get_value() : -1; 1616 } 1617 1618 jlong ClassLoader::class_link_time_ms() { 1619 return UsePerfData ? 1620 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1; 1621 } 1622 1623 int ClassLoader::compute_Object_vtable() { 1624 // hardwired for JDK1.2 -- would need to duplicate class file parsing 1625 // code to determine actual value from file 1626 // Would be value '11' if finals were in vtable 1627 int JDK_1_2_Object_vtable_size = 5; 1628 return JDK_1_2_Object_vtable_size * vtableEntry::size(); 1629 } 1630 1631 1632 void classLoader_init1() { 1633 ClassLoader::initialize(); 1634 } 1635 1636 // Complete the ClassPathEntry setup for the boot loader 1637 void ClassLoader::classLoader_init2(TRAPS) { 1638 // Setup the list of module/path pairs for --patch-module processing 1639 // This must be done after the SymbolTable is created in order 1640 // to use fast_compare on module names instead of a string compare. 1641 if (Arguments::get_patch_mod_prefix() != NULL) { 1642 setup_patch_mod_entries(); 1643 } 1644 1645 // Create the ModuleEntry for java.base (must occur after setup_patch_mod_entries 1646 // to successfully determine if java.base has been patched) 1647 create_javabase(); 1648 1649 // Setup the initial java.base/path pair for the exploded build entries. 1650 // As more modules are defined during module system initialization, more 1651 // entries will be added to the exploded build array. 1652 if (!has_jrt_entry()) { 1653 assert(!DumpSharedSpaces, "DumpSharedSpaces not supported with exploded module builds"); 1654 assert(!DynamicDumpSharedSpaces, "DynamicDumpSharedSpaces not supported with exploded module builds"); 1655 assert(!UseSharedSpaces, "UsedSharedSpaces not supported with exploded module builds"); 1656 // Set up the boot loader's _exploded_entries list. Note that this gets 1657 // done before loading any classes, by the same thread that will 1658 // subsequently do the first class load. So, no lock is needed for this. 1659 assert(_exploded_entries == NULL, "Should only get initialized once"); 1660 _exploded_entries = new (ResourceObj::C_HEAP, mtModule) 1661 GrowableArray<ModuleClassPathList*>(EXPLODED_ENTRY_SIZE, true); 1662 add_to_exploded_build_list(vmSymbols::java_base(), CHECK); 1663 } 1664 } 1665 1666 1667 bool ClassLoader::get_canonical_path(const char* orig, char* out, int len) { 1668 assert(orig != NULL && out != NULL && len > 0, "bad arguments"); 1669 if (CanonicalizeEntry != NULL) { 1670 JavaThread* THREAD = JavaThread::current(); 1671 JNIEnv* env = THREAD->jni_environment(); 1672 ResourceMark rm(THREAD); 1673 1674 // os::native_path writes into orig_copy 1675 char* orig_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, strlen(orig)+1); 1676 strcpy(orig_copy, orig); 1677 if ((CanonicalizeEntry)(env, os::native_path(orig_copy), out, len) < 0) { 1678 return false; 1679 } 1680 } else { 1681 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing 1682 strncpy(out, orig, len); 1683 out[len - 1] = '\0'; 1684 } 1685 return true; 1686 } 1687 1688 void ClassLoader::create_javabase() { 1689 Thread* THREAD = Thread::current(); 1690 1691 // Create java.base's module entry for the boot 1692 // class loader prior to loading j.l.Ojbect. 1693 ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data(); 1694 1695 // Get module entry table 1696 ModuleEntryTable* null_cld_modules = null_cld->modules(); 1697 if (null_cld_modules == NULL) { 1698 vm_exit_during_initialization("No ModuleEntryTable for the boot class loader"); 1699 } 1700 1701 { 1702 MutexLocker ml(Module_lock, THREAD); 1703 ModuleEntry* jb_module = null_cld_modules->locked_create_entry(Handle(), 1704 false, vmSymbols::java_base(), NULL, NULL, null_cld); 1705 if (jb_module == NULL) { 1706 vm_exit_during_initialization("Unable to create ModuleEntry for " JAVA_BASE_NAME); 1707 } 1708 ModuleEntryTable::set_javabase_moduleEntry(jb_module); 1709 } 1710 } 1711 1712 // Please keep following two functions at end of this file. With them placed at top or in middle of the file, 1713 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589. 1714 void PerfClassTraceTime::initialize() { 1715 if (!UsePerfData) return; 1716 1717 if (_eventp != NULL) { 1718 // increment the event counter 1719 _eventp->inc(); 1720 } 1721 1722 // stop the current active thread-local timer to measure inclusive time 1723 _prev_active_event = -1; 1724 for (int i=0; i < EVENT_TYPE_COUNT; i++) { 1725 if (_timers[i].is_active()) { 1726 assert(_prev_active_event == -1, "should have only one active timer"); 1727 _prev_active_event = i; 1728 _timers[i].stop(); 1729 } 1730 } 1731 1732 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) { 1733 // start the inclusive timer if not recursively called 1734 _t.start(); 1735 } 1736 1737 // start thread-local timer of the given event type 1738 if (!_timers[_event_type].is_active()) { 1739 _timers[_event_type].start(); 1740 } 1741 } 1742 1743 PerfClassTraceTime::~PerfClassTraceTime() { 1744 if (!UsePerfData) return; 1745 1746 // stop the thread-local timer as the event completes 1747 // and resume the thread-local timer of the event next on the stack 1748 _timers[_event_type].stop(); 1749 jlong selftime = _timers[_event_type].ticks(); 1750 1751 if (_prev_active_event >= 0) { 1752 _timers[_prev_active_event].start(); 1753 } 1754 1755 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return; 1756 1757 // increment the counters only on the leaf call 1758 _t.stop(); 1759 _timep->inc(_t.ticks()); 1760 if (_selftimep != NULL) { 1761 _selftimep->inc(selftime); 1762 } 1763 // add all class loading related event selftime to the accumulated time counter 1764 ClassLoader::perf_accumulated_time()->inc(selftime); 1765 1766 // reset the timer 1767 _timers[_event_type].reset(); 1768 }