1 /* 2 * Copyright (c) 1997, 2018, 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/systemDictionary.hpp" 38 #include "classfile/vmSymbols.hpp" 39 #include "compiler/compileBroker.hpp" 40 #include "gc/shared/collectedHeap.inline.hpp" 41 #include "gc/shared/generation.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.hpp" 62 #include "runtime/handles.inline.hpp" 63 #include "runtime/init.hpp" 64 #include "runtime/interfaceSupport.inline.hpp" 65 #include "runtime/java.hpp" 66 #include "runtime/javaCalls.hpp" 67 #include "runtime/os.inline.hpp" 68 #include "runtime/threadCritical.hpp" 69 #include "runtime/timer.hpp" 70 #include "runtime/vm_version.hpp" 71 #include "services/management.hpp" 72 #include "services/threadService.hpp" 73 #include "utilities/events.hpp" 74 #include "utilities/hashtable.inline.hpp" 75 #include "utilities/macros.hpp" 76 #if INCLUDE_CDS 77 #include "classfile/sharedClassUtil.hpp" 78 #include "classfile/sharedPathsMiscInfo.hpp" 79 #endif 80 81 // Entry points in zip.dll for loading zip/jar file entries 82 83 typedef void * * (*ZipOpen_t)(const char *name, char **pmsg); 84 typedef void (*ZipClose_t)(jzfile *zip); 85 typedef jzentry* (*FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen); 86 typedef jboolean (*ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf); 87 typedef jzentry* (*GetNextEntry_t)(jzfile *zip, jint n); 88 typedef jboolean (*ZipInflateFully_t)(void *inBuf, jlong inLen, void *outBuf, jlong outLen, char **pmsg); 89 typedef jint (*Crc32_t)(jint crc, const jbyte *buf, jint len); 90 91 static ZipOpen_t ZipOpen = NULL; 92 static ZipClose_t ZipClose = NULL; 93 static FindEntry_t FindEntry = NULL; 94 static ReadEntry_t ReadEntry = NULL; 95 static GetNextEntry_t GetNextEntry = NULL; 96 static canonicalize_fn_t CanonicalizeEntry = NULL; 97 static ZipInflateFully_t ZipInflateFully = NULL; 98 static Crc32_t Crc32 = NULL; 99 100 // Entry points for jimage.dll for loading jimage file entries 101 102 static JImageOpen_t JImageOpen = NULL; 103 static JImageClose_t JImageClose = NULL; 104 static JImagePackageToModule_t JImagePackageToModule = NULL; 105 static JImageFindResource_t JImageFindResource = NULL; 106 static JImageGetResource_t JImageGetResource = NULL; 107 static JImageResourceIterator_t JImageResourceIterator = NULL; 108 static JImage_ResourcePath_t JImageResourcePath = NULL; 109 110 // Globals 111 112 PerfCounter* ClassLoader::_perf_accumulated_time = NULL; 113 PerfCounter* ClassLoader::_perf_classes_inited = NULL; 114 PerfCounter* ClassLoader::_perf_class_init_time = NULL; 115 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL; 116 PerfCounter* ClassLoader::_perf_classes_verified = NULL; 117 PerfCounter* ClassLoader::_perf_class_verify_time = NULL; 118 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL; 119 PerfCounter* ClassLoader::_perf_classes_linked = NULL; 120 PerfCounter* ClassLoader::_perf_class_link_time = NULL; 121 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL; 122 PerfCounter* ClassLoader::_perf_class_parse_time = NULL; 123 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL; 124 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL; 125 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL; 126 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL; 127 PerfCounter* ClassLoader::_perf_app_classload_time = NULL; 128 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL; 129 PerfCounter* ClassLoader::_perf_app_classload_count = NULL; 130 PerfCounter* ClassLoader::_perf_define_appclasses = NULL; 131 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL; 132 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL; 133 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL; 134 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL; 135 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL; 136 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL; 137 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL; 138 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL; 139 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL; 140 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL; 141 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL; 142 143 GrowableArray<ModuleClassPathList*>* ClassLoader::_patch_mod_entries = NULL; 144 GrowableArray<ModuleClassPathList*>* ClassLoader::_exploded_entries = NULL; 145 ClassPathEntry* ClassLoader::_jrt_entry = NULL; 146 ClassPathEntry* ClassLoader::_first_append_entry = NULL; 147 ClassPathEntry* ClassLoader::_last_append_entry = NULL; 148 #if INCLUDE_CDS 149 ClassPathEntry* ClassLoader::_app_classpath_entries = NULL; 150 ClassPathEntry* ClassLoader::_last_app_classpath_entry = NULL; 151 ClassPathEntry* ClassLoader::_module_path_entries = NULL; 152 ClassPathEntry* ClassLoader::_last_module_path_entry = NULL; 153 SharedPathsMiscInfo* ClassLoader::_shared_paths_misc_info = NULL; 154 #endif 155 156 // helper routines 157 bool string_starts_with(const char* str, const char* str_to_find) { 158 size_t str_len = strlen(str); 159 size_t str_to_find_len = strlen(str_to_find); 160 if (str_to_find_len > str_len) { 161 return false; 162 } 163 return (strncmp(str, str_to_find, str_to_find_len) == 0); 164 } 165 166 static const char* get_jimage_version_string() { 167 static char version_string[10] = ""; 168 if (version_string[0] == '\0') { 169 jio_snprintf(version_string, sizeof(version_string), "%d.%d", 170 Abstract_VM_Version::vm_major_version(), Abstract_VM_Version::vm_minor_version()); 171 } 172 return (const char*)version_string; 173 } 174 175 bool ClassLoader::string_ends_with(const char* str, const char* str_to_find) { 176 size_t str_len = strlen(str); 177 size_t str_to_find_len = strlen(str_to_find); 178 if (str_to_find_len > str_len) { 179 return false; 180 } 181 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0); 182 } 183 184 // Used to obtain the package name from a fully qualified class name. 185 // It is the responsibility of the caller to establish a ResourceMark. 186 const char* ClassLoader::package_from_name(const char* const class_name, bool* bad_class_name) { 187 if (class_name == NULL) { 188 if (bad_class_name != NULL) { 189 *bad_class_name = true; 190 } 191 return NULL; 192 } 193 194 if (bad_class_name != NULL) { 195 *bad_class_name = false; 196 } 197 198 const char* const last_slash = strrchr(class_name, '/'); 199 if (last_slash == NULL) { 200 // No package name 201 return NULL; 202 } 203 204 char* class_name_ptr = (char*) class_name; 205 // Skip over '['s 206 if (*class_name_ptr == '[') { 207 do { 208 class_name_ptr++; 209 } while (*class_name_ptr == '['); 210 211 // Fully qualified class names should not contain a 'L'. 212 // Set bad_class_name to true to indicate that the package name 213 // could not be obtained due to an error condition. 214 // In this situation, is_same_class_package returns false. 215 if (*class_name_ptr == 'L') { 216 if (bad_class_name != NULL) { 217 *bad_class_name = true; 218 } 219 return NULL; 220 } 221 } 222 223 int length = last_slash - class_name_ptr; 224 225 // A class name could have just the slash character in the name. 226 if (length <= 0) { 227 // No package name 228 if (bad_class_name != NULL) { 229 *bad_class_name = true; 230 } 231 return NULL; 232 } 233 234 // drop name after last slash (including slash) 235 // Ex., "java/lang/String.class" => "java/lang" 236 char* pkg_name = NEW_RESOURCE_ARRAY(char, length + 1); 237 strncpy(pkg_name, class_name_ptr, length); 238 *(pkg_name+length) = '\0'; 239 240 return (const char *)pkg_name; 241 } 242 243 // Given a fully qualified class name, find its defining package in the class loader's 244 // package entry table. 245 PackageEntry* ClassLoader::get_package_entry(const char* class_name, ClassLoaderData* loader_data, TRAPS) { 246 ResourceMark rm(THREAD); 247 const char *pkg_name = ClassLoader::package_from_name(class_name); 248 if (pkg_name == NULL) { 249 return NULL; 250 } 251 PackageEntryTable* pkgEntryTable = loader_data->packages(); 252 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(pkg_name, CHECK_NULL); 253 return pkgEntryTable->lookup_only(pkg_symbol); 254 } 255 256 ClassPathDirEntry::ClassPathDirEntry(const char* dir) : ClassPathEntry() { 257 char* copy = NEW_C_HEAP_ARRAY(char, strlen(dir)+1, mtClass); 258 strcpy(copy, dir); 259 _dir = copy; 260 } 261 262 263 ClassFileStream* ClassPathDirEntry::open_stream(const char* name, TRAPS) { 264 // construct full path name 265 assert((_dir != NULL) && (name != NULL), "sanity"); 266 size_t path_len = strlen(_dir) + strlen(name) + strlen(os::file_separator()) + 1; 267 char* path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, path_len); 268 int len = jio_snprintf(path, path_len, "%s%s%s", _dir, os::file_separator(), name); 269 assert(len == (int)(path_len - 1), "sanity"); 270 // check if file exists 271 struct stat st; 272 if (os::stat(path, &st) == 0) { 273 // found file, open it 274 int file_handle = os::open(path, 0, 0); 275 if (file_handle != -1) { 276 // read contents into resource array 277 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size); 278 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size); 279 // close file 280 os::close(file_handle); 281 // construct ClassFileStream 282 if (num_read == (size_t)st.st_size) { 283 if (UsePerfData) { 284 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read); 285 } 286 FREE_RESOURCE_ARRAY(char, path, path_len); 287 // Resource allocated 288 return new ClassFileStream(buffer, 289 st.st_size, 290 _dir, 291 ClassFileStream::verify); 292 } 293 } 294 } 295 FREE_RESOURCE_ARRAY(char, path, path_len); 296 return NULL; 297 } 298 299 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name, bool is_boot_append) : ClassPathEntry() { 300 _zip = zip; 301 char *copy = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1, mtClass); 302 strcpy(copy, zip_name); 303 _zip_name = copy; 304 _is_boot_append = is_boot_append; 305 _multi_versioned = _unknown; 306 } 307 308 ClassPathZipEntry::~ClassPathZipEntry() { 309 if (ZipClose != NULL) { 310 (*ZipClose)(_zip); 311 } 312 FREE_C_HEAP_ARRAY(char, _zip_name); 313 } 314 315 u1* ClassPathZipEntry::open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS) { 316 // enable call to C land 317 JavaThread* thread = JavaThread::current(); 318 ThreadToNativeFromVM ttn(thread); 319 // check whether zip archive contains name 320 jint name_len; 321 jzentry* entry = (*FindEntry)(_zip, name, filesize, &name_len); 322 if (entry == NULL) return NULL; 323 u1* buffer; 324 char name_buf[128]; 325 char* filename; 326 if (name_len < 128) { 327 filename = name_buf; 328 } else { 329 filename = NEW_RESOURCE_ARRAY(char, name_len + 1); 330 } 331 332 // read contents into resource array 333 int size = (*filesize) + ((nul_terminate) ? 1 : 0); 334 buffer = NEW_RESOURCE_ARRAY(u1, size); 335 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL; 336 337 // return result 338 if (nul_terminate) { 339 buffer[*filesize] = 0; 340 } 341 return buffer; 342 } 343 344 #if INCLUDE_CDS 345 u1* ClassPathZipEntry::open_versioned_entry(const char* name, jint* filesize, TRAPS) { 346 u1* buffer = NULL; 347 if (DumpSharedSpaces && !_is_boot_append) { 348 // We presume default is multi-release enabled 349 const char* multi_ver = Arguments::get_property("jdk.util.jar.enableMultiRelease"); 350 const char* verstr = Arguments::get_property("jdk.util.jar.version"); 351 bool is_multi_ver = (multi_ver == NULL || 352 strcmp(multi_ver, "true") == 0 || 353 strcmp(multi_ver, "force") == 0) && 354 is_multiple_versioned(THREAD); 355 // command line version setting 356 int version = 0; 357 const int base_version = 8; // JDK8 358 int cur_ver = JDK_Version::current().major_version(); 359 if (verstr != NULL) { 360 version = atoi(verstr); 361 if (version < base_version || version > cur_ver) { 362 // If the specified version is lower than the base version, the base 363 // entry will be used; if the version is higher than the current 364 // jdk version, the highest versioned entry will be used. 365 if (version < base_version) { 366 is_multi_ver = false; 367 } 368 // print out warning, do not use assertion here since it will continue to look 369 // for proper version. 370 warning("JDK%d is not supported in multiple version jars", version); 371 } 372 } 373 374 if (is_multi_ver) { 375 int n; 376 const char* version_entry = "META-INF/versions/"; 377 // 10 is the max length of a decimal 32-bit non-negative number 378 // 2 includes the '/' and trailing zero 379 size_t entry_name_len = strlen(version_entry) + 10 + strlen(name) + 2; 380 char* entry_name = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, entry_name_len); 381 if (version > 0) { 382 n = jio_snprintf(entry_name, entry_name_len, "%s%d/%s", version_entry, version, name); 383 entry_name[n] = '\0'; 384 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL); 385 if (buffer == NULL) { 386 warning("Could not find %s in %s, try to find highest version instead", entry_name, _zip_name); 387 } 388 } 389 if (buffer == NULL) { 390 for (int i = cur_ver; i >= base_version; i--) { 391 n = jio_snprintf(entry_name, entry_name_len, "%s%d/%s", version_entry, i, name); 392 entry_name[n] = '\0'; 393 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL); 394 if (buffer != NULL) { 395 break; 396 } 397 } 398 } 399 FREE_RESOURCE_ARRAY(char, entry_name, entry_name_len); 400 } 401 } 402 return buffer; 403 } 404 405 bool ClassPathZipEntry::is_multiple_versioned(TRAPS) { 406 assert(DumpSharedSpaces, "called only at dump time"); 407 if (_multi_versioned != _unknown) { 408 return (_multi_versioned == _yes) ? true : false; 409 } 410 jint size; 411 char* buffer = (char*)open_entry("META-INF/MANIFEST.MF", &size, true, CHECK_false); 412 if (buffer != NULL) { 413 char* p = buffer; 414 for ( ; *p; ++p) *p = tolower(*p); 415 if (strstr(buffer, "multi-release: true") != NULL) { 416 _multi_versioned = _yes; 417 return true; 418 } 419 } 420 _multi_versioned = _no; 421 return false; 422 } 423 #endif // INCLUDE_CDS 424 425 ClassFileStream* ClassPathZipEntry::open_stream(const char* name, TRAPS) { 426 jint filesize; 427 u1* buffer = open_versioned_entry(name, &filesize, CHECK_NULL); 428 if (buffer == NULL) { 429 buffer = open_entry(name, &filesize, false, CHECK_NULL); 430 if (buffer == NULL) { 431 return NULL; 432 } 433 } 434 if (UsePerfData) { 435 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize); 436 } 437 // Resource allocated 438 return new ClassFileStream(buffer, 439 filesize, 440 _zip_name, 441 ClassFileStream::verify); 442 } 443 444 // invoke function for each entry in the zip file 445 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) { 446 JavaThread* thread = JavaThread::current(); 447 HandleMark handle_mark(thread); 448 ThreadToNativeFromVM ttn(thread); 449 for (int n = 0; ; n++) { 450 jzentry * ze = ((*GetNextEntry)(_zip, n)); 451 if (ze == NULL) break; 452 (*f)(ze->name, context); 453 } 454 } 455 456 ClassPathImageEntry::ClassPathImageEntry(JImageFile* jimage, const char* name) : 457 ClassPathEntry(), 458 _jimage(jimage) { 459 guarantee(jimage != NULL, "jimage file is null"); 460 guarantee(name != NULL, "jimage file name is null"); 461 size_t len = strlen(name) + 1; 462 _name = NEW_C_HEAP_ARRAY(const char, len, mtClass); 463 strncpy((char *)_name, name, len); 464 } 465 466 ClassPathImageEntry::~ClassPathImageEntry() { 467 if (_name != NULL) { 468 FREE_C_HEAP_ARRAY(const char, _name); 469 _name = NULL; 470 } 471 if (_jimage != NULL) { 472 (*JImageClose)(_jimage); 473 _jimage = NULL; 474 } 475 } 476 477 // For a class in a named module, look it up in the jimage file using this syntax: 478 // /<module-name>/<package-name>/<base-class> 479 // 480 // Assumptions: 481 // 1. There are no unnamed modules in the jimage file. 482 // 2. A package is in at most one module in the jimage file. 483 // 484 ClassFileStream* ClassPathImageEntry::open_stream(const char* name, TRAPS) { 485 jlong size; 486 JImageLocationRef location = (*JImageFindResource)(_jimage, "", get_jimage_version_string(), name, &size); 487 488 if (location == 0) { 489 ResourceMark rm; 490 const char* pkg_name = ClassLoader::package_from_name(name); 491 492 if (pkg_name != NULL) { 493 if (!Universe::is_module_initialized()) { 494 location = (*JImageFindResource)(_jimage, JAVA_BASE_NAME, get_jimage_version_string(), name, &size); 495 #if INCLUDE_CDS 496 // CDS uses the boot class loader to load classes whose packages are in 497 // modules defined for other class loaders. So, for now, get their module 498 // names from the "modules" jimage file. 499 if (DumpSharedSpaces && location == 0) { 500 const char* module_name = (*JImagePackageToModule)(_jimage, pkg_name); 501 if (module_name != NULL) { 502 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size); 503 } 504 } 505 #endif 506 507 } else { 508 PackageEntry* package_entry = ClassLoader::get_package_entry(name, ClassLoaderData::the_null_class_loader_data(), CHECK_NULL); 509 if (package_entry != NULL) { 510 ResourceMark rm; 511 // Get the module name 512 ModuleEntry* module = package_entry->module(); 513 assert(module != NULL, "Boot classLoader package missing module"); 514 assert(module->is_named(), "Boot classLoader package is in unnamed module"); 515 const char* module_name = module->name()->as_C_string(); 516 if (module_name != NULL) { 517 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size); 518 } 519 } 520 } 521 } 522 } 523 if (location != 0) { 524 if (UsePerfData) { 525 ClassLoader::perf_sys_classfile_bytes_read()->inc(size); 526 } 527 char* data = NEW_RESOURCE_ARRAY(char, size); 528 (*JImageGetResource)(_jimage, location, data, size); 529 // Resource allocated 530 return new ClassFileStream((u1*)data, 531 (int)size, 532 _name, 533 ClassFileStream::verify); 534 } 535 536 return NULL; 537 } 538 539 JImageLocationRef ClassLoader::jimage_find_resource(JImageFile* jf, 540 const char* module_name, 541 const char* file_name, 542 jlong &size) { 543 return ((*JImageFindResource)(jf, module_name, get_jimage_version_string(), file_name, &size)); 544 } 545 546 #ifndef PRODUCT 547 bool ctw_visitor(JImageFile* jimage, 548 const char* module_name, const char* version, const char* package, 549 const char* name, const char* extension, void* arg) { 550 if (strcmp(extension, "class") == 0) { 551 Thread* THREAD = Thread::current(); 552 ResourceMark rm(THREAD); 553 char* path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JIMAGE_MAX_PATH); 554 jio_snprintf(path, JIMAGE_MAX_PATH - 1, "%s/%s.class", package, name); 555 ClassLoader::compile_the_world_in(path, *(Handle*)arg, THREAD); 556 return !HAS_PENDING_EXCEPTION; 557 } 558 return true; 559 } 560 561 void ClassPathImageEntry::compile_the_world(Handle loader, TRAPS) { 562 tty->print_cr("CompileTheWorld : Compiling all classes in %s", name()); 563 tty->cr(); 564 (*JImageResourceIterator)(_jimage, (JImageResourceVisitor_t)ctw_visitor, (void *)&loader); 565 if (HAS_PENDING_EXCEPTION) { 566 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 567 CLEAR_PENDING_EXCEPTION; 568 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); 569 tty->print_cr("Increase class metadata storage if a limit was set"); 570 } else { 571 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); 572 } 573 } 574 } 575 #endif 576 577 bool ClassPathImageEntry::is_modules_image() const { 578 return ClassLoader::is_modules_image(name()); 579 } 580 581 #if INCLUDE_CDS 582 void ClassLoader::exit_with_path_failure(const char* error, const char* message) { 583 assert(DumpSharedSpaces, "only called at dump time"); 584 tty->print_cr("Hint: enable -Xlog:class+path=info to diagnose the failure"); 585 vm_exit_during_initialization(error, message); 586 } 587 #endif 588 589 ModuleClassPathList::ModuleClassPathList(Symbol* module_name) { 590 _module_name = module_name; 591 _module_first_entry = NULL; 592 _module_last_entry = NULL; 593 } 594 595 ModuleClassPathList::~ModuleClassPathList() { 596 // Clean out each ClassPathEntry on list 597 ClassPathEntry* e = _module_first_entry; 598 while (e != NULL) { 599 ClassPathEntry* next_entry = e->next(); 600 delete e; 601 e = next_entry; 602 } 603 } 604 605 void ModuleClassPathList::add_to_list(ClassPathEntry* new_entry) { 606 if (new_entry != NULL) { 607 if (_module_last_entry == NULL) { 608 _module_first_entry = _module_last_entry = new_entry; 609 } else { 610 _module_last_entry->set_next(new_entry); 611 _module_last_entry = new_entry; 612 } 613 } 614 } 615 616 void ClassLoader::trace_class_path(const char* msg, const char* name) { 617 LogTarget(Info, class, path) lt; 618 if (lt.is_enabled()) { 619 LogStream ls(lt); 620 if (msg) { 621 ls.print("%s", msg); 622 } 623 if (name) { 624 if (strlen(name) < 256) { 625 ls.print("%s", name); 626 } else { 627 // For very long paths, we need to print each character separately, 628 // as print_cr() has a length limit 629 while (name[0] != '\0') { 630 ls.print("%c", name[0]); 631 name++; 632 } 633 } 634 } 635 ls.cr(); 636 } 637 } 638 639 void ClassLoader::setup_bootstrap_search_path() { 640 const char* sys_class_path = Arguments::get_sysclasspath(); 641 if (PrintSharedArchiveAndExit) { 642 // Don't print sys_class_path - this is the bootcp of this current VM process, not necessarily 643 // the same as the bootcp of the shared archive. 644 } else { 645 trace_class_path("bootstrap loader class path=", sys_class_path); 646 } 647 #if INCLUDE_CDS 648 if (DumpSharedSpaces) { 649 _shared_paths_misc_info->add_boot_classpath(sys_class_path); 650 } 651 #endif 652 setup_boot_search_path(sys_class_path); 653 } 654 655 #if INCLUDE_CDS 656 int ClassLoader::get_shared_paths_misc_info_size() { 657 return _shared_paths_misc_info->get_used_bytes(); 658 } 659 660 void* ClassLoader::get_shared_paths_misc_info() { 661 return _shared_paths_misc_info->buffer(); 662 } 663 664 bool ClassLoader::check_shared_paths_misc_info(void *buf, int size) { 665 SharedPathsMiscInfo* checker = SharedClassUtil::allocate_shared_paths_misc_info((char*)buf, size); 666 bool result = checker->check(); 667 delete checker; 668 return result; 669 } 670 671 void ClassLoader::setup_app_search_path(const char *class_path) { 672 673 assert(DumpSharedSpaces, "Sanity"); 674 675 Thread* THREAD = Thread::current(); 676 int len = (int)strlen(class_path); 677 int end = 0; 678 679 // Iterate over class path entries 680 for (int start = 0; start < len; start = end) { 681 while (class_path[end] && class_path[end] != os::path_separator()[0]) { 682 end++; 683 } 684 EXCEPTION_MARK; 685 ResourceMark rm(THREAD); 686 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1); 687 strncpy(path, &class_path[start], end - start); 688 path[end - start] = '\0'; 689 690 update_class_path_entry_list(path, false, false); 691 692 while (class_path[end] == os::path_separator()[0]) { 693 end++; 694 } 695 } 696 } 697 698 void ClassLoader::add_to_module_path_entries(const char* path, 699 ClassPathEntry* entry) { 700 assert(entry != NULL, "ClassPathEntry should not be NULL"); 701 assert(DumpSharedSpaces, "dump time only"); 702 703 // The entry does not exist, add to the list 704 if (_module_path_entries == NULL) { 705 assert(_last_module_path_entry == NULL, "Sanity"); 706 _module_path_entries = _last_module_path_entry = entry; 707 } else { 708 _last_module_path_entry->set_next(entry); 709 _last_module_path_entry = entry; 710 } 711 } 712 713 // Add a module path to the _module_path_entries list. 714 void ClassLoader::update_module_path_entry_list(const char *path, TRAPS) { 715 assert(DumpSharedSpaces, "dump time only"); 716 struct stat st; 717 int ret = os::stat(path, &st); 718 assert(ret == 0, "module path must exist"); 719 // File or directory found 720 ClassPathEntry* new_entry = NULL; 721 new_entry = create_class_path_entry(path, &st, true /* throw_exception */, 722 false /*is_boot_append */, CHECK); 723 if (new_entry == NULL) { 724 return; 725 } 726 727 add_to_module_path_entries(path, new_entry); 728 return; 729 } 730 731 void ClassLoader::setup_module_search_path(const char* path, TRAPS) { 732 update_module_path_entry_list(path, THREAD); 733 } 734 #endif // INCLUDE_CDS 735 736 // Construct the array of module/path pairs as specified to --patch-module 737 // for the boot loader to search ahead of the jimage, if the class being 738 // loaded is defined to a module that has been specified to --patch-module. 739 void ClassLoader::setup_patch_mod_entries() { 740 Thread* THREAD = Thread::current(); 741 GrowableArray<ModulePatchPath*>* patch_mod_args = Arguments::get_patch_mod_prefix(); 742 int num_of_entries = patch_mod_args->length(); 743 744 745 // Set up the boot loader's _patch_mod_entries list 746 _patch_mod_entries = new (ResourceObj::C_HEAP, mtModule) GrowableArray<ModuleClassPathList*>(num_of_entries, true); 747 748 for (int i = 0; i < num_of_entries; i++) { 749 const char* module_name = (patch_mod_args->at(i))->module_name(); 750 Symbol* const module_sym = SymbolTable::lookup(module_name, (int)strlen(module_name), CHECK); 751 assert(module_sym != NULL, "Failed to obtain Symbol for module name"); 752 ModuleClassPathList* module_cpl = new ModuleClassPathList(module_sym); 753 754 char* class_path = (patch_mod_args->at(i))->path_string(); 755 int len = (int)strlen(class_path); 756 int end = 0; 757 // Iterate over the module's class path entries 758 for (int start = 0; start < len; start = end) { 759 while (class_path[end] && class_path[end] != os::path_separator()[0]) { 760 end++; 761 } 762 EXCEPTION_MARK; 763 ResourceMark rm(THREAD); 764 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1); 765 strncpy(path, &class_path[start], end - start); 766 path[end - start] = '\0'; 767 768 struct stat st; 769 if (os::stat(path, &st) == 0) { 770 // File or directory found 771 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK); 772 // If the path specification is valid, enter it into this module's list 773 if (new_entry != NULL) { 774 module_cpl->add_to_list(new_entry); 775 } 776 } 777 778 while (class_path[end] == os::path_separator()[0]) { 779 end++; 780 } 781 } 782 783 // Record the module into the list of --patch-module entries only if 784 // valid ClassPathEntrys have been created 785 if (module_cpl->module_first_entry() != NULL) { 786 _patch_mod_entries->push(module_cpl); 787 } 788 } 789 } 790 791 // Determine whether the module has been patched via the command-line 792 // option --patch-module 793 bool ClassLoader::is_in_patch_mod_entries(Symbol* module_name) { 794 if (_patch_mod_entries != NULL && _patch_mod_entries->is_nonempty()) { 795 int table_len = _patch_mod_entries->length(); 796 for (int i = 0; i < table_len; i++) { 797 ModuleClassPathList* patch_mod = _patch_mod_entries->at(i); 798 if (module_name->fast_compare(patch_mod->module_name()) == 0) { 799 return true; 800 } 801 } 802 } 803 return false; 804 } 805 806 // Set up the _jrt_entry if present and boot append path 807 void ClassLoader::setup_boot_search_path(const char *class_path) { 808 int len = (int)strlen(class_path); 809 int end = 0; 810 bool set_base_piece = true; 811 812 #if INCLUDE_CDS 813 if (DumpSharedSpaces) { 814 if (!Arguments::has_jimage()) { 815 vm_exit_during_initialization("CDS is not supported in exploded JDK build", NULL); 816 } 817 } 818 #endif 819 820 // Iterate over class path entries 821 for (int start = 0; start < len; start = end) { 822 while (class_path[end] && class_path[end] != os::path_separator()[0]) { 823 end++; 824 } 825 EXCEPTION_MARK; 826 ResourceMark rm(THREAD); 827 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1); 828 strncpy(path, &class_path[start], end - start); 829 path[end - start] = '\0'; 830 831 if (set_base_piece) { 832 // The first time through the bootstrap_search setup, it must be determined 833 // what the base or core piece of the boot loader search is. Either a java runtime 834 // image is present or this is an exploded module build situation. 835 assert(string_ends_with(path, MODULES_IMAGE_NAME) || string_ends_with(path, JAVA_BASE_NAME), 836 "Incorrect boot loader search path, no java runtime image or " JAVA_BASE_NAME " exploded build"); 837 struct stat st; 838 if (os::stat(path, &st) == 0) { 839 // Directory found 840 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK); 841 842 // Check for a jimage 843 if (Arguments::has_jimage()) { 844 assert(_jrt_entry == NULL, "should not setup bootstrap class search path twice"); 845 assert(new_entry != NULL && new_entry->is_modules_image(), "No java runtime image present"); 846 _jrt_entry = new_entry; 847 assert(_jrt_entry->jimage() != NULL, "No java runtime image"); 848 } 849 } else { 850 // If path does not exist, exit 851 vm_exit_during_initialization("Unable to establish the boot loader search path", path); 852 } 853 set_base_piece = false; 854 } else { 855 // Every entry on the system boot class path after the initial base piece, 856 // which is set by os::set_boot_path(), is considered an appended entry. 857 update_class_path_entry_list(path, false, true); 858 } 859 860 while (class_path[end] == os::path_separator()[0]) { 861 end++; 862 } 863 } 864 } 865 866 // During an exploded modules build, each module defined to the boot loader 867 // will be added to the ClassLoader::_exploded_entries array. 868 void ClassLoader::add_to_exploded_build_list(Symbol* module_sym, TRAPS) { 869 assert(!ClassLoader::has_jrt_entry(), "Exploded build not applicable"); 870 assert(_exploded_entries != NULL, "_exploded_entries was not initialized"); 871 872 // Find the module's symbol 873 ResourceMark rm(THREAD); 874 const char *module_name = module_sym->as_C_string(); 875 const char *home = Arguments::get_java_home(); 876 const char file_sep = os::file_separator()[0]; 877 // 10 represents the length of "modules" + 2 file separators + \0 878 size_t len = strlen(home) + strlen(module_name) + 10; 879 char *path = NEW_RESOURCE_ARRAY(char, len); 880 jio_snprintf(path, len, "%s%cmodules%c%s", home, file_sep, file_sep, module_name); 881 882 struct stat st; 883 if (os::stat(path, &st) == 0) { 884 // Directory found 885 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK); 886 887 // If the path specification is valid, enter it into this module's list. 888 // There is no need to check for duplicate modules in the exploded entry list, 889 // since no two modules with the same name can be defined to the boot loader. 890 // This is checked at module definition time in Modules::define_module. 891 if (new_entry != NULL) { 892 ModuleClassPathList* module_cpl = new ModuleClassPathList(module_sym); 893 module_cpl->add_to_list(new_entry); 894 { 895 MutexLocker ml(Module_lock, THREAD); 896 _exploded_entries->push(module_cpl); 897 } 898 log_info(class, load)("path: %s", path); 899 } 900 } 901 } 902 903 ClassPathEntry* ClassLoader::create_class_path_entry(const char *path, const struct stat* st, 904 bool throw_exception, 905 bool is_boot_append, TRAPS) { 906 JavaThread* thread = JavaThread::current(); 907 ClassPathEntry* new_entry = NULL; 908 if ((st->st_mode & S_IFMT) == S_IFREG) { 909 ResourceMark rm(thread); 910 // Regular file, should be a zip or jimage file 911 // Canonicalized filename 912 char* canonical_path = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, JVM_MAXPATHLEN); 913 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 914 // This matches the classic VM 915 if (throw_exception) { 916 THROW_MSG_(vmSymbols::java_io_IOException(), "Bad pathname", NULL); 917 } else { 918 return NULL; 919 } 920 } 921 jint error; 922 JImageFile* jimage =(*JImageOpen)(canonical_path, &error); 923 if (jimage != NULL) { 924 new_entry = new ClassPathImageEntry(jimage, canonical_path); 925 } else { 926 char* error_msg = NULL; 927 jzfile* zip; 928 { 929 // enable call to C land 930 ThreadToNativeFromVM ttn(thread); 931 HandleMark hm(thread); 932 zip = (*ZipOpen)(canonical_path, &error_msg); 933 } 934 if (zip != NULL && error_msg == NULL) { 935 new_entry = new ClassPathZipEntry(zip, path, is_boot_append); 936 } else { 937 char *msg; 938 if (error_msg == NULL) { 939 msg = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, strlen(path) + 128); ; 940 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path); 941 } else { 942 int len = (int)(strlen(path) + strlen(error_msg) + 128); 943 msg = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, len); ; 944 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path); 945 } 946 // Don't complain about bad jar files added via -Xbootclasspath/a:. 947 if (throw_exception && is_init_completed()) { 948 THROW_MSG_(vmSymbols::java_lang_ClassNotFoundException(), msg, NULL); 949 } else { 950 return NULL; 951 } 952 } 953 } 954 log_info(class, path)("opened: %s", path); 955 log_info(class, load)("opened: %s", path); 956 } else { 957 // Directory 958 new_entry = new ClassPathDirEntry(path); 959 log_info(class, load)("path: %s", path); 960 } 961 return new_entry; 962 } 963 964 965 // Create a class path zip entry for a given path (return NULL if not found 966 // or zip/JAR file cannot be opened) 967 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path, bool is_boot_append) { 968 // check for a regular file 969 struct stat st; 970 if (os::stat(path, &st) == 0) { 971 if ((st.st_mode & S_IFMT) == S_IFREG) { 972 char canonical_path[JVM_MAXPATHLEN]; 973 if (get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 974 char* error_msg = NULL; 975 jzfile* zip; 976 { 977 // enable call to C land 978 JavaThread* thread = JavaThread::current(); 979 ThreadToNativeFromVM ttn(thread); 980 HandleMark hm(thread); 981 zip = (*ZipOpen)(canonical_path, &error_msg); 982 } 983 if (zip != NULL && error_msg == NULL) { 984 // create using canonical path 985 return new ClassPathZipEntry(zip, canonical_path, is_boot_append); 986 } 987 } 988 } 989 } 990 return NULL; 991 } 992 993 // returns true if entry already on class path 994 bool ClassLoader::contains_append_entry(const char* name) { 995 ClassPathEntry* e = _first_append_entry; 996 while (e != NULL) { 997 // assume zip entries have been canonicalized 998 if (strcmp(name, e->name()) == 0) { 999 return true; 1000 } 1001 e = e->next(); 1002 } 1003 return false; 1004 } 1005 1006 void ClassLoader::add_to_boot_append_entries(ClassPathEntry *new_entry) { 1007 if (new_entry != NULL) { 1008 if (_last_append_entry == NULL) { 1009 assert(_first_append_entry == NULL, "boot loader's append class path entry list not empty"); 1010 _first_append_entry = _last_append_entry = new_entry; 1011 } else { 1012 _last_append_entry->set_next(new_entry); 1013 _last_append_entry = new_entry; 1014 } 1015 } 1016 } 1017 1018 // Record the path entries specified in -cp during dump time. The recorded 1019 // information will be used at runtime for loading the archived app classes. 1020 // 1021 // Note that at dump time, ClassLoader::_app_classpath_entries are NOT used for 1022 // loading app classes. Instead, the app class are loaded by the 1023 // jdk/internal/loader/ClassLoaders$AppClassLoader instance. 1024 void ClassLoader::add_to_app_classpath_entries(const char* path, 1025 ClassPathEntry* entry, 1026 bool check_for_duplicates) { 1027 #if INCLUDE_CDS 1028 assert(entry != NULL, "ClassPathEntry should not be NULL"); 1029 ClassPathEntry* e = _app_classpath_entries; 1030 if (check_for_duplicates) { 1031 while (e != NULL) { 1032 if (strcmp(e->name(), entry->name()) == 0) { 1033 // entry already exists 1034 return; 1035 } 1036 e = e->next(); 1037 } 1038 } 1039 1040 // The entry does not exist, add to the list 1041 if (_app_classpath_entries == NULL) { 1042 assert(_last_app_classpath_entry == NULL, "Sanity"); 1043 _app_classpath_entries = _last_app_classpath_entry = entry; 1044 } else { 1045 _last_app_classpath_entry->set_next(entry); 1046 _last_app_classpath_entry = entry; 1047 } 1048 1049 if (entry->is_jar_file()) { 1050 ClassLoaderExt::process_jar_manifest(entry, check_for_duplicates); 1051 } 1052 #endif 1053 } 1054 1055 // Returns true IFF the file/dir exists and the entry was successfully created. 1056 bool ClassLoader::update_class_path_entry_list(const char *path, 1057 bool check_for_duplicates, 1058 bool is_boot_append, 1059 bool throw_exception) { 1060 struct stat st; 1061 if (os::stat(path, &st) == 0) { 1062 // File or directory found 1063 ClassPathEntry* new_entry = NULL; 1064 Thread* THREAD = Thread::current(); 1065 new_entry = create_class_path_entry(path, &st, throw_exception, is_boot_append, CHECK_(false)); 1066 if (new_entry == NULL) { 1067 return false; 1068 } 1069 1070 // Do not reorder the bootclasspath which would break get_system_package(). 1071 // Add new entry to linked list 1072 if (is_boot_append) { 1073 add_to_boot_append_entries(new_entry); 1074 } else { 1075 add_to_app_classpath_entries(path, new_entry, check_for_duplicates); 1076 } 1077 return true; 1078 } else { 1079 #if INCLUDE_CDS 1080 if (DumpSharedSpaces) { 1081 _shared_paths_misc_info->add_nonexist_path(path); 1082 } 1083 #endif 1084 return false; 1085 } 1086 } 1087 1088 static void print_module_entry_table(const GrowableArray<ModuleClassPathList*>* const module_list) { 1089 ResourceMark rm; 1090 int num_of_entries = module_list->length(); 1091 for (int i = 0; i < num_of_entries; i++) { 1092 ClassPathEntry* e; 1093 ModuleClassPathList* mpl = module_list->at(i); 1094 tty->print("%s=", mpl->module_name()->as_C_string()); 1095 e = mpl->module_first_entry(); 1096 while (e != NULL) { 1097 tty->print("%s", e->name()); 1098 e = e->next(); 1099 if (e != NULL) { 1100 tty->print("%s", os::path_separator()); 1101 } 1102 } 1103 tty->print(" ;"); 1104 } 1105 } 1106 1107 void ClassLoader::print_bootclasspath() { 1108 ClassPathEntry* e; 1109 tty->print("[bootclasspath= "); 1110 1111 // Print --patch-module module/path specifications first 1112 if (_patch_mod_entries != NULL) { 1113 print_module_entry_table(_patch_mod_entries); 1114 } 1115 1116 // [jimage | exploded modules build] 1117 if (has_jrt_entry()) { 1118 // Print the location of the java runtime image 1119 tty->print("%s ;", _jrt_entry->name()); 1120 } else { 1121 // Print exploded module build path specifications 1122 if (_exploded_entries != NULL) { 1123 print_module_entry_table(_exploded_entries); 1124 } 1125 } 1126 1127 // appended entries 1128 e = _first_append_entry; 1129 while (e != NULL) { 1130 tty->print("%s ;", e->name()); 1131 e = e->next(); 1132 } 1133 tty->print_cr("]"); 1134 } 1135 1136 void ClassLoader::load_zip_library() { 1137 assert(ZipOpen == NULL, "should not load zip library twice"); 1138 // First make sure native library is loaded 1139 os::native_java_library(); 1140 // Load zip library 1141 char path[JVM_MAXPATHLEN]; 1142 char ebuf[1024]; 1143 void* handle = NULL; 1144 if (os::dll_locate_lib(path, sizeof(path), Arguments::get_dll_dir(), "zip")) { 1145 handle = os::dll_load(path, ebuf, sizeof ebuf); 1146 } 1147 if (handle == NULL) { 1148 vm_exit_during_initialization("Unable to load ZIP library", path); 1149 } 1150 // Lookup zip entry points 1151 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open")); 1152 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close")); 1153 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry")); 1154 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry")); 1155 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry")); 1156 ZipInflateFully = CAST_TO_FN_PTR(ZipInflateFully_t, os::dll_lookup(handle, "ZIP_InflateFully")); 1157 Crc32 = CAST_TO_FN_PTR(Crc32_t, os::dll_lookup(handle, "ZIP_CRC32")); 1158 1159 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL 1160 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || 1161 GetNextEntry == NULL || Crc32 == NULL) { 1162 vm_exit_during_initialization("Corrupted ZIP library", path); 1163 } 1164 1165 if (ZipInflateFully == NULL) { 1166 vm_exit_during_initialization("Corrupted ZIP library ZIP_InflateFully missing", path); 1167 } 1168 1169 // Lookup canonicalize entry in libjava.dll 1170 void *javalib_handle = os::native_java_library(); 1171 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize")); 1172 // This lookup only works on 1.3. Do not check for non-null here 1173 } 1174 1175 void ClassLoader::load_jimage_library() { 1176 // First make sure native library is loaded 1177 os::native_java_library(); 1178 // Load jimage library 1179 char path[JVM_MAXPATHLEN]; 1180 char ebuf[1024]; 1181 void* handle = NULL; 1182 if (os::dll_locate_lib(path, sizeof(path), Arguments::get_dll_dir(), "jimage")) { 1183 handle = os::dll_load(path, ebuf, sizeof ebuf); 1184 } 1185 if (handle == NULL) { 1186 vm_exit_during_initialization("Unable to load jimage library", path); 1187 } 1188 1189 // Lookup jimage entry points 1190 JImageOpen = CAST_TO_FN_PTR(JImageOpen_t, os::dll_lookup(handle, "JIMAGE_Open")); 1191 guarantee(JImageOpen != NULL, "function JIMAGE_Open not found"); 1192 JImageClose = CAST_TO_FN_PTR(JImageClose_t, os::dll_lookup(handle, "JIMAGE_Close")); 1193 guarantee(JImageClose != NULL, "function JIMAGE_Close not found"); 1194 JImagePackageToModule = CAST_TO_FN_PTR(JImagePackageToModule_t, os::dll_lookup(handle, "JIMAGE_PackageToModule")); 1195 guarantee(JImagePackageToModule != NULL, "function JIMAGE_PackageToModule not found"); 1196 JImageFindResource = CAST_TO_FN_PTR(JImageFindResource_t, os::dll_lookup(handle, "JIMAGE_FindResource")); 1197 guarantee(JImageFindResource != NULL, "function JIMAGE_FindResource not found"); 1198 JImageGetResource = CAST_TO_FN_PTR(JImageGetResource_t, os::dll_lookup(handle, "JIMAGE_GetResource")); 1199 guarantee(JImageGetResource != NULL, "function JIMAGE_GetResource not found"); 1200 JImageResourceIterator = CAST_TO_FN_PTR(JImageResourceIterator_t, os::dll_lookup(handle, "JIMAGE_ResourceIterator")); 1201 guarantee(JImageResourceIterator != NULL, "function JIMAGE_ResourceIterator not found"); 1202 JImageResourcePath = CAST_TO_FN_PTR(JImage_ResourcePath_t, os::dll_lookup(handle, "JIMAGE_ResourcePath")); 1203 guarantee(JImageResourcePath != NULL, "function JIMAGE_ResourcePath not found"); 1204 } 1205 1206 jboolean ClassLoader::decompress(void *in, u8 inSize, void *out, u8 outSize, char **pmsg) { 1207 return (*ZipInflateFully)(in, inSize, out, outSize, pmsg); 1208 } 1209 1210 int ClassLoader::crc32(int crc, const char* buf, int len) { 1211 assert(Crc32 != NULL, "ZIP_CRC32 is not found"); 1212 return (*Crc32)(crc, (const jbyte*)buf, len); 1213 } 1214 1215 // Function add_package extracts the package from the fully qualified class name 1216 // and checks if the package is in the boot loader's package entry table. If so, 1217 // then it sets the classpath_index in the package entry record. 1218 // 1219 // The classpath_index field is used to find the entry on the boot loader class 1220 // path for packages with classes loaded by the boot loader from -Xbootclasspath/a 1221 // in an unnamed module. It is also used to indicate (for all packages whose 1222 // classes are loaded by the boot loader) that at least one of the package's 1223 // classes has been loaded. 1224 bool ClassLoader::add_package(const char *fullq_class_name, s2 classpath_index, TRAPS) { 1225 assert(fullq_class_name != NULL, "just checking"); 1226 1227 // Get package name from fully qualified class name. 1228 ResourceMark rm; 1229 const char *cp = package_from_name(fullq_class_name); 1230 if (cp != NULL) { 1231 PackageEntryTable* pkg_entry_tbl = ClassLoaderData::the_null_class_loader_data()->packages(); 1232 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(cp, CHECK_false); 1233 PackageEntry* pkg_entry = pkg_entry_tbl->lookup_only(pkg_symbol); 1234 if (pkg_entry != NULL) { 1235 assert(classpath_index != -1, "Unexpected classpath_index"); 1236 pkg_entry->set_classpath_index(classpath_index); 1237 } else { 1238 return false; 1239 } 1240 } 1241 return true; 1242 } 1243 1244 oop ClassLoader::get_system_package(const char* name, TRAPS) { 1245 // Look up the name in the boot loader's package entry table. 1246 if (name != NULL) { 1247 TempNewSymbol package_sym = SymbolTable::new_symbol(name, (int)strlen(name), CHECK_NULL); 1248 // Look for the package entry in the boot loader's package entry table. 1249 PackageEntry* package = 1250 ClassLoaderData::the_null_class_loader_data()->packages()->lookup_only(package_sym); 1251 1252 // Return NULL if package does not exist or if no classes in that package 1253 // have been loaded. 1254 if (package != NULL && package->has_loaded_class()) { 1255 ModuleEntry* module = package->module(); 1256 if (module->location() != NULL) { 1257 ResourceMark rm(THREAD); 1258 Handle ml = java_lang_String::create_from_str( 1259 module->location()->as_C_string(), THREAD); 1260 return ml(); 1261 } 1262 // Return entry on boot loader class path. 1263 Handle cph = java_lang_String::create_from_str( 1264 ClassLoader::classpath_entry(package->classpath_index())->name(), THREAD); 1265 return cph(); 1266 } 1267 } 1268 return NULL; 1269 } 1270 1271 objArrayOop ClassLoader::get_system_packages(TRAPS) { 1272 ResourceMark rm(THREAD); 1273 // List of pointers to PackageEntrys that have loaded classes. 1274 GrowableArray<PackageEntry*>* loaded_class_pkgs = new GrowableArray<PackageEntry*>(50); 1275 { 1276 MutexLocker ml(Module_lock, THREAD); 1277 1278 PackageEntryTable* pe_table = 1279 ClassLoaderData::the_null_class_loader_data()->packages(); 1280 1281 // Collect the packages that have at least one loaded class. 1282 for (int x = 0; x < pe_table->table_size(); x++) { 1283 for (PackageEntry* package_entry = pe_table->bucket(x); 1284 package_entry != NULL; 1285 package_entry = package_entry->next()) { 1286 if (package_entry->has_loaded_class()) { 1287 loaded_class_pkgs->append(package_entry); 1288 } 1289 } 1290 } 1291 } 1292 1293 1294 // Allocate objArray and fill with java.lang.String 1295 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 1296 loaded_class_pkgs->length(), CHECK_NULL); 1297 objArrayHandle result(THREAD, r); 1298 for (int x = 0; x < loaded_class_pkgs->length(); x++) { 1299 PackageEntry* package_entry = loaded_class_pkgs->at(x); 1300 Handle str = java_lang_String::create_from_symbol(package_entry->name(), CHECK_NULL); 1301 result->obj_at_put(x, str()); 1302 } 1303 return result(); 1304 } 1305 1306 // caller needs ResourceMark 1307 const char* ClassLoader::file_name_for_class_name(const char* class_name, 1308 int class_name_len) { 1309 assert(class_name != NULL, "invariant"); 1310 assert((int)strlen(class_name) == class_name_len, "invariant"); 1311 1312 static const char class_suffix[] = ".class"; 1313 1314 char* const file_name = NEW_RESOURCE_ARRAY(char, 1315 class_name_len + 1316 sizeof(class_suffix)); // includes term NULL 1317 1318 strncpy(file_name, class_name, class_name_len); 1319 strncpy(&file_name[class_name_len], class_suffix, sizeof(class_suffix)); 1320 1321 return file_name; 1322 } 1323 1324 ClassPathEntry* find_first_module_cpe(ModuleEntry* mod_entry, 1325 const GrowableArray<ModuleClassPathList*>* const module_list) { 1326 int num_of_entries = module_list->length(); 1327 const Symbol* class_module_name = mod_entry->name(); 1328 1329 // Loop through all the modules in either the patch-module or exploded entries looking for module 1330 for (int i = 0; i < num_of_entries; i++) { 1331 ModuleClassPathList* module_cpl = module_list->at(i); 1332 Symbol* module_cpl_name = module_cpl->module_name(); 1333 1334 if (module_cpl_name->fast_compare(class_module_name) == 0) { 1335 // Class' module has been located. 1336 return module_cpl->module_first_entry(); 1337 } 1338 } 1339 return NULL; 1340 } 1341 1342 1343 // Search either the patch-module or exploded build entries for class. 1344 ClassFileStream* ClassLoader::search_module_entries(const GrowableArray<ModuleClassPathList*>* const module_list, 1345 const char* const class_name, 1346 const char* const file_name, 1347 TRAPS) { 1348 ClassFileStream* stream = NULL; 1349 1350 // Find the class' defining module in the boot loader's module entry table 1351 PackageEntry* pkg_entry = get_package_entry(class_name, ClassLoaderData::the_null_class_loader_data(), CHECK_NULL); 1352 ModuleEntry* mod_entry = (pkg_entry != NULL) ? pkg_entry->module() : NULL; 1353 1354 // If the module system has not defined java.base yet, then 1355 // classes loaded are assumed to be defined to java.base. 1356 // When java.base is eventually defined by the module system, 1357 // all packages of classes that have been previously loaded 1358 // are verified in ModuleEntryTable::verify_javabase_packages(). 1359 if (!Universe::is_module_initialized() && 1360 !ModuleEntryTable::javabase_defined() && 1361 mod_entry == NULL) { 1362 mod_entry = ModuleEntryTable::javabase_moduleEntry(); 1363 } 1364 1365 // The module must be a named module 1366 ClassPathEntry* e = NULL; 1367 if (mod_entry != NULL && mod_entry->is_named()) { 1368 if (module_list == _exploded_entries) { 1369 // The exploded build entries can be added to at any time so a lock is 1370 // needed when searching them. 1371 assert(!ClassLoader::has_jrt_entry(), "Must be exploded build"); 1372 MutexLocker ml(Module_lock, THREAD); 1373 e = find_first_module_cpe(mod_entry, module_list); 1374 } else { 1375 e = find_first_module_cpe(mod_entry, module_list); 1376 } 1377 } 1378 1379 // Try to load the class from the module's ClassPathEntry list. 1380 while (e != NULL) { 1381 stream = e->open_stream(file_name, CHECK_NULL); 1382 // No context.check is required since CDS is not supported 1383 // for an exploded modules build or if --patch-module is specified. 1384 if (NULL != stream) { 1385 return stream; 1386 } 1387 e = e->next(); 1388 } 1389 // If the module was located, break out even if the class was not 1390 // located successfully from that module's ClassPathEntry list. 1391 // There will not be another valid entry for that module. 1392 return NULL; 1393 } 1394 1395 // Called by the boot classloader to load classes 1396 InstanceKlass* ClassLoader::load_class(Symbol* name, bool search_append_only, TRAPS) { 1397 assert(name != NULL, "invariant"); 1398 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 1399 1400 ResourceMark rm(THREAD); 1401 HandleMark hm(THREAD); 1402 1403 const char* const class_name = name->as_C_string(); 1404 1405 EventMark m("loading class %s", class_name); 1406 1407 const char* const file_name = file_name_for_class_name(class_name, 1408 name->utf8_length()); 1409 assert(file_name != NULL, "invariant"); 1410 1411 ClassLoaderExt::Context context(class_name, file_name, THREAD); 1412 1413 // Lookup stream for parsing .class file 1414 ClassFileStream* stream = NULL; 1415 s2 classpath_index = 0; 1416 ClassPathEntry* e = NULL; 1417 1418 // If DumpSharedSpaces is true boot loader visibility boundaries are set to: 1419 // - [jimage] + [_first_append_entry to _last_append_entry] (all path entries). 1420 // 1421 // If search_append_only is true, boot loader visibility boundaries are 1422 // set to be _first_append_entry to the end. This includes: 1423 // [-Xbootclasspath/a]; [jvmti appended entries] 1424 // 1425 // If both DumpSharedSpaces and search_append_only are false, boot loader 1426 // visibility boundaries are set to be the --patch-module entries plus the base piece. 1427 // This would include: 1428 // [--patch-module=<module>=<file>(<pathsep><file>)*]; [jimage | exploded module build] 1429 // 1430 1431 // Load Attempt #1: --patch-module 1432 // Determine the class' defining module. If it appears in the _patch_mod_entries, 1433 // attempt to load the class from those locations specific to the module. 1434 // Specifications to --patch-module can contain a partial number of classes 1435 // that are part of the overall module definition. So if a particular class is not 1436 // found within its module specification, the search should continue to Load Attempt #2. 1437 // Note: The --patch-module entries are never searched if the boot loader's 1438 // visibility boundary is limited to only searching the append entries. 1439 if (_patch_mod_entries != NULL && !search_append_only) { 1440 // At CDS dump time, the --patch-module entries are ignored. That means a 1441 // class is still loaded from the runtime image even if it might 1442 // appear in the _patch_mod_entries. The runtime shared class visibility 1443 // check will determine if a shared class is visible based on the runtime 1444 // environemnt, including the runtime --patch-module setting. 1445 if (!DumpSharedSpaces) { 1446 stream = search_module_entries(_patch_mod_entries, class_name, file_name, CHECK_NULL); 1447 } 1448 } 1449 1450 // Load Attempt #2: [jimage | exploded build] 1451 if (!search_append_only && (NULL == stream)) { 1452 if (has_jrt_entry()) { 1453 e = _jrt_entry; 1454 stream = _jrt_entry->open_stream(file_name, CHECK_NULL); 1455 } else { 1456 // Exploded build - attempt to locate class in its defining module's location. 1457 assert(_exploded_entries != NULL, "No exploded build entries present"); 1458 stream = search_module_entries(_exploded_entries, class_name, file_name, CHECK_NULL); 1459 } 1460 } 1461 1462 // Load Attempt #3: [-Xbootclasspath/a]; [jvmti appended entries] 1463 if ((search_append_only || DumpSharedSpaces) && (NULL == stream)) { 1464 // For the boot loader append path search, the starting classpath_index 1465 // for the appended piece is always 1 to account for either the 1466 // _jrt_entry or the _exploded_entries. 1467 assert(classpath_index == 0, "The classpath_index has been incremented incorrectly"); 1468 classpath_index = 1; 1469 1470 e = _first_append_entry; 1471 while (e != NULL) { 1472 stream = e->open_stream(file_name, CHECK_NULL); 1473 if (NULL != stream) { 1474 break; 1475 } 1476 e = e->next(); 1477 ++classpath_index; 1478 } 1479 } 1480 1481 if (NULL == stream) { 1482 return NULL; 1483 } 1484 1485 stream->set_verify(context.should_verify(classpath_index)); 1486 1487 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); 1488 Handle protection_domain; 1489 1490 InstanceKlass* result = KlassFactory::create_from_stream(stream, 1491 name, 1492 loader_data, 1493 protection_domain, 1494 NULL, // host_klass 1495 NULL, // cp_patches 1496 THREAD); 1497 if (HAS_PENDING_EXCEPTION) { 1498 if (DumpSharedSpaces) { 1499 tty->print_cr("Preload Error: Failed to load %s", class_name); 1500 } 1501 return NULL; 1502 } 1503 1504 if (!add_package(file_name, classpath_index, THREAD)) { 1505 return NULL; 1506 } 1507 1508 return result; 1509 } 1510 1511 #if INCLUDE_CDS 1512 char* ClassLoader::skip_uri_protocol(char* source) { 1513 if (strncmp(source, "file:", 5) == 0) { 1514 // file: protocol path could start with file:/ or file:/// 1515 // locate the char after all the forward slashes 1516 int offset = 5; 1517 while (*(source + offset) == '/') { 1518 offset++; 1519 } 1520 source += offset; 1521 // for non-windows platforms, move back one char as the path begins with a '/' 1522 #ifndef _WINDOWS 1523 source -= 1; 1524 #endif 1525 } else if (strncmp(source, "jrt:/", 5) == 0) { 1526 source += 5; 1527 } 1528 return source; 1529 } 1530 1531 // Record the shared classpath index and loader type for classes loaded 1532 // by the builtin loaders at dump time. 1533 void ClassLoader::record_result(InstanceKlass* ik, const ClassFileStream* stream, TRAPS) { 1534 assert(DumpSharedSpaces, "sanity"); 1535 assert(stream != NULL, "sanity"); 1536 1537 if (ik->is_anonymous()) { 1538 // We do not archive anonymous classes. 1539 return; 1540 } 1541 1542 oop loader = ik->class_loader(); 1543 char* src = (char*)stream->source(); 1544 if (src == NULL) { 1545 if (loader == NULL) { 1546 // JFR classes 1547 ik->set_shared_classpath_index(0); 1548 ik->set_class_loader_type(ClassLoader::BOOT_LOADER); 1549 } 1550 return; 1551 } 1552 1553 assert(has_jrt_entry(), "CDS dumping does not support exploded JDK build"); 1554 1555 ResourceMark rm(THREAD); 1556 int classpath_index = -1; 1557 PackageEntry* pkg_entry = ik->package(); 1558 1559 if (FileMapInfo::get_number_of_shared_paths() > 0) { 1560 char* canonical_path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JVM_MAXPATHLEN); 1561 1562 // save the path from the file: protocol or the module name from the jrt: protocol 1563 // if no protocol prefix is found, path is the same as stream->source() 1564 char* path = skip_uri_protocol(src); 1565 char* canonical_src_path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JVM_MAXPATHLEN); 1566 for (int i = 0; i < FileMapInfo::get_number_of_shared_paths(); i++) { 1567 SharedClassPathEntry* ent = FileMapInfo::shared_path(i); 1568 if (get_canonical_path(ent->name(), canonical_path, JVM_MAXPATHLEN) && 1569 get_canonical_path(path, canonical_src_path, JVM_MAXPATHLEN)) { 1570 // If the path (from the class stream source) is the same as the shared 1571 // class or module path, then we have a match. 1572 if (strcmp(canonical_path, canonical_src_path) == 0) { 1573 // NULL pkg_entry and pkg_entry in an unnamed module implies the class 1574 // is from the -cp or boot loader append path which consists of -Xbootclasspath/a 1575 // and jvmti appended entries. 1576 if ((pkg_entry == NULL) || (pkg_entry->in_unnamed_module())) { 1577 // Ensure the index is within the -cp range before assigning 1578 // to the classpath_index. 1579 if (SystemDictionary::is_system_class_loader(loader) && 1580 (i >= ClassLoaderExt::app_class_paths_start_index()) && 1581 (i < ClassLoaderExt::app_module_paths_start_index())) { 1582 classpath_index = i; 1583 break; 1584 } else { 1585 if ((i >= 1) && 1586 (i < ClassLoaderExt::app_class_paths_start_index())) { 1587 // The class must be from boot loader append path which consists of 1588 // -Xbootclasspath/a and jvmti appended entries. 1589 assert(loader == NULL, "sanity"); 1590 classpath_index = i; 1591 break; 1592 } 1593 } 1594 } else { 1595 // A class from a named module from the --module-path. Ensure the index is 1596 // within the --module-path range before assigning to the classpath_index. 1597 if ((pkg_entry != NULL) && !(pkg_entry->in_unnamed_module()) && (i > 0)) { 1598 if (i >= ClassLoaderExt::app_module_paths_start_index() && 1599 i < FileMapInfo::get_number_of_shared_paths()) { 1600 classpath_index = i; 1601 break; 1602 } 1603 } 1604 } 1605 } 1606 // for index 0 and the stream->source() is the modules image or has the jrt: protocol. 1607 // The class must be from the runtime modules image. 1608 if (i == 0 && (is_modules_image(src) || string_starts_with(src, "jrt:"))) { 1609 classpath_index = i; 1610 break; 1611 } 1612 } 1613 } 1614 1615 // No path entry found for this class. Must be a shared class loaded by the 1616 // user defined classloader. 1617 if (classpath_index < 0) { 1618 assert(ik->shared_classpath_index() < 0, "Sanity"); 1619 return; 1620 } 1621 } else { 1622 // The shared path table is set up after module system initialization. 1623 // The path table contains no entry before that. Any classes loaded prior 1624 // to the setup of the shared path table must be from the modules image. 1625 assert(is_modules_image(src), "stream must be from modules image"); 1626 assert(FileMapInfo::get_number_of_shared_paths() == 0, "shared path table must not have been setup"); 1627 classpath_index = 0; 1628 } 1629 1630 const char* const class_name = ik->name()->as_C_string(); 1631 const char* const file_name = file_name_for_class_name(class_name, 1632 ik->name()->utf8_length()); 1633 assert(file_name != NULL, "invariant"); 1634 1635 ClassLoaderExt::Context context(class_name, file_name, CATCH); 1636 context.record_result(ik->name(), classpath_index, ik, THREAD); 1637 } 1638 #endif // INCLUDE_CDS 1639 1640 // Initialize the class loader's access to methods in libzip. Parse and 1641 // process the boot classpath into a list ClassPathEntry objects. Once 1642 // this list has been created, it must not change order (see class PackageInfo) 1643 // it can be appended to and is by jvmti and the kernel vm. 1644 1645 void ClassLoader::initialize() { 1646 EXCEPTION_MARK; 1647 1648 if (UsePerfData) { 1649 // jvmstat performance counters 1650 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time"); 1651 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime"); 1652 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self"); 1653 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime"); 1654 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self"); 1655 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime"); 1656 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self"); 1657 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses"); 1658 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses"); 1659 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses"); 1660 1661 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime"); 1662 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self"); 1663 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime"); 1664 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime"); 1665 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime"); 1666 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime"); 1667 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self"); 1668 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount"); 1669 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses"); 1670 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime"); 1671 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self"); 1672 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes"); 1673 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes"); 1674 1675 1676 // The following performance counters are added for measuring the impact 1677 // of the bug fix of 6365597. They are mainly focused on finding out 1678 // the behavior of system & user-defined classloader lock, whether 1679 // ClassLoader.loadClass/findClass is being called synchronized or not. 1680 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS, 1681 "systemLoaderLockContentionRate"); 1682 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS, 1683 "nonSystemLoaderLockContentionRate"); 1684 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS, 1685 "jvmFindLoadedClassNoLockCalls"); 1686 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS, 1687 "jvmDefineClassNoLockCalls"); 1688 1689 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS, 1690 "jniDefineClassNoLockCalls"); 1691 1692 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS, 1693 "unsafeDefineClassCalls"); 1694 1695 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS, 1696 "loadInstanceClassFailRate"); 1697 } 1698 1699 // lookup zip library entry points 1700 load_zip_library(); 1701 // lookup jimage library entry points 1702 load_jimage_library(); 1703 #if INCLUDE_CDS 1704 // initialize search path 1705 if (DumpSharedSpaces) { 1706 _shared_paths_misc_info = SharedClassUtil::allocate_shared_paths_misc_info(); 1707 } 1708 #endif 1709 setup_bootstrap_search_path(); 1710 } 1711 1712 #if INCLUDE_CDS 1713 void ClassLoader::initialize_shared_path() { 1714 if (DumpSharedSpaces) { 1715 ClassLoaderExt::setup_search_paths(); 1716 _shared_paths_misc_info->write_jint(0); // see comments in SharedPathsMiscInfo::check() 1717 } 1718 } 1719 1720 void ClassLoader::initialize_module_path(TRAPS) { 1721 if (DumpSharedSpaces) { 1722 ClassLoaderExt::setup_module_paths(THREAD); 1723 FileMapInfo::allocate_shared_path_table(); 1724 } 1725 } 1726 #endif 1727 1728 jlong ClassLoader::classloader_time_ms() { 1729 return UsePerfData ? 1730 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1; 1731 } 1732 1733 jlong ClassLoader::class_init_count() { 1734 return UsePerfData ? _perf_classes_inited->get_value() : -1; 1735 } 1736 1737 jlong ClassLoader::class_init_time_ms() { 1738 return UsePerfData ? 1739 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1; 1740 } 1741 1742 jlong ClassLoader::class_verify_time_ms() { 1743 return UsePerfData ? 1744 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1; 1745 } 1746 1747 jlong ClassLoader::class_link_count() { 1748 return UsePerfData ? _perf_classes_linked->get_value() : -1; 1749 } 1750 1751 jlong ClassLoader::class_link_time_ms() { 1752 return UsePerfData ? 1753 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1; 1754 } 1755 1756 int ClassLoader::compute_Object_vtable() { 1757 // hardwired for JDK1.2 -- would need to duplicate class file parsing 1758 // code to determine actual value from file 1759 // Would be value '11' if finals were in vtable 1760 int JDK_1_2_Object_vtable_size = 5; 1761 return JDK_1_2_Object_vtable_size * vtableEntry::size(); 1762 } 1763 1764 1765 void classLoader_init1() { 1766 ClassLoader::initialize(); 1767 } 1768 1769 // Complete the ClassPathEntry setup for the boot loader 1770 void ClassLoader::classLoader_init2(TRAPS) { 1771 // Setup the list of module/path pairs for --patch-module processing 1772 // This must be done after the SymbolTable is created in order 1773 // to use fast_compare on module names instead of a string compare. 1774 if (Arguments::get_patch_mod_prefix() != NULL) { 1775 setup_patch_mod_entries(); 1776 } 1777 1778 // Create the ModuleEntry for java.base (must occur after setup_patch_mod_entries 1779 // to successfully determine if java.base has been patched) 1780 create_javabase(); 1781 1782 // Setup the initial java.base/path pair for the exploded build entries. 1783 // As more modules are defined during module system initialization, more 1784 // entries will be added to the exploded build array. 1785 if (!has_jrt_entry()) { 1786 assert(!DumpSharedSpaces, "DumpSharedSpaces not supported with exploded module builds"); 1787 assert(!UseSharedSpaces, "UsedSharedSpaces not supported with exploded module builds"); 1788 // Set up the boot loader's _exploded_entries list. Note that this gets 1789 // done before loading any classes, by the same thread that will 1790 // subsequently do the first class load. So, no lock is needed for this. 1791 assert(_exploded_entries == NULL, "Should only get initialized once"); 1792 _exploded_entries = new (ResourceObj::C_HEAP, mtModule) 1793 GrowableArray<ModuleClassPathList*>(EXPLODED_ENTRY_SIZE, true); 1794 add_to_exploded_build_list(vmSymbols::java_base(), CHECK); 1795 } 1796 } 1797 1798 1799 bool ClassLoader::get_canonical_path(const char* orig, char* out, int len) { 1800 assert(orig != NULL && out != NULL && len > 0, "bad arguments"); 1801 if (CanonicalizeEntry != NULL) { 1802 JavaThread* THREAD = JavaThread::current(); 1803 JNIEnv* env = THREAD->jni_environment(); 1804 ResourceMark rm(THREAD); 1805 1806 // os::native_path writes into orig_copy 1807 char* orig_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, strlen(orig)+1); 1808 strcpy(orig_copy, orig); 1809 if ((CanonicalizeEntry)(env, os::native_path(orig_copy), out, len) < 0) { 1810 return false; 1811 } 1812 } else { 1813 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing 1814 strncpy(out, orig, len); 1815 out[len - 1] = '\0'; 1816 } 1817 return true; 1818 } 1819 1820 void ClassLoader::create_javabase() { 1821 Thread* THREAD = Thread::current(); 1822 1823 // Create java.base's module entry for the boot 1824 // class loader prior to loading j.l.Ojbect. 1825 ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data(); 1826 1827 // Get module entry table 1828 ModuleEntryTable* null_cld_modules = null_cld->modules(); 1829 if (null_cld_modules == NULL) { 1830 vm_exit_during_initialization("No ModuleEntryTable for the boot class loader"); 1831 } 1832 1833 { 1834 MutexLocker ml(Module_lock, THREAD); 1835 ModuleEntry* jb_module = null_cld_modules->locked_create_entry_or_null(Handle(), 1836 false, vmSymbols::java_base(), NULL, NULL, null_cld); 1837 if (jb_module == NULL) { 1838 vm_exit_during_initialization("Unable to create ModuleEntry for " JAVA_BASE_NAME); 1839 } 1840 ModuleEntryTable::set_javabase_moduleEntry(jb_module); 1841 } 1842 } 1843 1844 #ifndef PRODUCT 1845 1846 // CompileTheWorld 1847 // 1848 // Iterates over all class path entries and forces compilation of all methods 1849 // in all classes found. Currently, only zip/jar archives are searched. 1850 // 1851 // The classes are loaded by the Java level bootstrap class loader, and the 1852 // initializer is called. If DelayCompilationDuringStartup is true (default), 1853 // the interpreter will run the initialization code. Note that forcing 1854 // initialization in this way could potentially lead to initialization order 1855 // problems, in which case we could just force the initialization bit to be set. 1856 1857 1858 // We need to iterate over the contents of a zip/jar file, so we replicate the 1859 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile, 1860 // since jzfile already has a void* definition. 1861 // 1862 // Note that this is only used in debug mode. 1863 // 1864 // HotSpot integration note: 1865 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build 1866 1867 1868 // JDK 1.3 version 1869 typedef struct real_jzentry { /* Zip file entry */ 1870 char *name; /* entry name */ 1871 jint time; /* modification time */ 1872 jint size; /* size of uncompressed data */ 1873 jint csize; /* size of compressed data (zero if uncompressed) */ 1874 jint crc; /* crc of uncompressed data */ 1875 char *comment; /* optional zip file comment */ 1876 jbyte *extra; /* optional extra data */ 1877 jint pos; /* position of LOC header (if negative) or data */ 1878 } real_jzentry; 1879 1880 typedef struct real_jzfile { /* Zip file */ 1881 char *name; /* zip file name */ 1882 jint refs; /* number of active references */ 1883 jint fd; /* open file descriptor */ 1884 void *lock; /* read lock */ 1885 char *comment; /* zip file comment */ 1886 char *msg; /* zip error message */ 1887 void *entries; /* array of hash cells */ 1888 jint total; /* total number of entries */ 1889 unsigned short *table; /* Hash chain heads: indexes into entries */ 1890 jint tablelen; /* number of hash eads */ 1891 real_jzfile *next; /* next zip file in search list */ 1892 jzentry *cache; /* we cache the most recently freed jzentry */ 1893 /* Information on metadata names in META-INF directory */ 1894 char **metanames; /* array of meta names (may have null names) */ 1895 jint metacount; /* number of slots in metanames array */ 1896 /* If there are any per-entry comments, they are in the comments array */ 1897 char **comments; 1898 } real_jzfile; 1899 1900 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) { 1901 // For now we only compile all methods in all classes in zip/jar files 1902 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir); 1903 tty->cr(); 1904 } 1905 1906 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) { 1907 real_jzfile* zip = (real_jzfile*) _zip; 1908 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); 1909 tty->cr(); 1910 // Iterate over all entries in zip file 1911 for (int n = 0; ; n++) { 1912 real_jzentry * ze = (real_jzentry *)((*GetNextEntry)(_zip, n)); 1913 if (ze == NULL) break; 1914 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); 1915 } 1916 if (HAS_PENDING_EXCEPTION) { 1917 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1918 CLEAR_PENDING_EXCEPTION; 1919 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); 1920 tty->print_cr("Increase class metadata storage if a limit was set"); 1921 } else { 1922 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); 1923 } 1924 } 1925 } 1926 1927 void ClassLoader::compile_the_world() { 1928 EXCEPTION_MARK; 1929 HandleMark hm(THREAD); 1930 ResourceMark rm(THREAD); 1931 1932 assert(has_jrt_entry(), "Compile The World not supported with exploded module build"); 1933 1934 // Find bootstrap loader 1935 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader()); 1936 jlong start = os::javaTimeMillis(); 1937 1938 // Compile the world for the modular java runtime image 1939 _jrt_entry->compile_the_world(system_class_loader, CATCH); 1940 1941 // Iterate over all bootstrap class path appended entries 1942 ClassPathEntry* e = _first_append_entry; 1943 while (e != NULL) { 1944 assert(!e->is_modules_image(), "A modular java runtime image is present on the list of appended entries"); 1945 e->compile_the_world(system_class_loader, CATCH); 1946 e = e->next(); 1947 } 1948 jlong end = os::javaTimeMillis(); 1949 tty->print_cr("CompileTheWorld : Done (%d classes, %d methods, " JLONG_FORMAT " ms)", 1950 _compile_the_world_class_counter, _compile_the_world_method_counter, (end - start)); 1951 { 1952 // Print statistics as if before normal exit: 1953 extern void print_statistics(); 1954 print_statistics(); 1955 } 1956 vm_exit(0); 1957 } 1958 1959 int ClassLoader::_compile_the_world_class_counter = 0; 1960 int ClassLoader::_compile_the_world_method_counter = 0; 1961 static int _codecache_sweep_counter = 0; 1962 1963 // Filter out all exceptions except OOMs 1964 static void clear_pending_exception_if_not_oom(TRAPS) { 1965 if (HAS_PENDING_EXCEPTION && 1966 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1967 CLEAR_PENDING_EXCEPTION; 1968 } 1969 // The CHECK at the caller will propagate the exception out 1970 } 1971 1972 /** 1973 * Returns if the given method should be compiled when doing compile-the-world. 1974 * 1975 * TODO: This should be a private method in a CompileTheWorld class. 1976 */ 1977 static bool can_be_compiled(const methodHandle& m, int comp_level) { 1978 assert(CompileTheWorld, "must be"); 1979 1980 // It's not valid to compile a native wrapper for MethodHandle methods 1981 // that take a MemberName appendix since the bytecode signature is not 1982 // correct. 1983 vmIntrinsics::ID iid = m->intrinsic_id(); 1984 if (MethodHandles::is_signature_polymorphic(iid) && MethodHandles::has_member_arg(iid)) { 1985 return false; 1986 } 1987 1988 return CompilationPolicy::can_be_compiled(m, comp_level); 1989 } 1990 1991 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) { 1992 if (string_ends_with(name, ".class")) { 1993 // We have a .class file 1994 int len = (int)strlen(name); 1995 char buffer[2048]; 1996 strncpy(buffer, name, len - 6); 1997 buffer[len-6] = 0; 1998 // If the file has a period after removing .class, it's not really a 1999 // valid class file. The class loader will check everything else. 2000 if (strchr(buffer, '.') == NULL) { 2001 _compile_the_world_class_counter++; 2002 if (_compile_the_world_class_counter > CompileTheWorldStopAt) return; 2003 2004 // Construct name without extension 2005 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK); 2006 // Use loader to load and initialize class 2007 Klass* k = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD); 2008 if (k != NULL && !HAS_PENDING_EXCEPTION) { 2009 k->initialize(THREAD); 2010 } 2011 bool exception_occurred = HAS_PENDING_EXCEPTION; 2012 clear_pending_exception_if_not_oom(CHECK); 2013 if (CompileTheWorldPreloadClasses && k != NULL) { 2014 InstanceKlass* ik = InstanceKlass::cast(k); 2015 ConstantPool::preload_and_initialize_all_classes(ik->constants(), THREAD); 2016 if (HAS_PENDING_EXCEPTION) { 2017 // If something went wrong in preloading we just ignore it 2018 clear_pending_exception_if_not_oom(CHECK); 2019 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_class_counter, buffer); 2020 } 2021 } 2022 2023 if (_compile_the_world_class_counter >= CompileTheWorldStartAt) { 2024 if (k == NULL || exception_occurred) { 2025 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class 2026 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_class_counter, buffer); 2027 } else { 2028 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_class_counter, buffer); 2029 // Preload all classes to get around uncommon traps 2030 // Iterate over all methods in class 2031 int comp_level = CompilationPolicy::policy()->initial_compile_level(); 2032 InstanceKlass* ik = InstanceKlass::cast(k); 2033 for (int n = 0; n < ik->methods()->length(); n++) { 2034 methodHandle m (THREAD, ik->methods()->at(n)); 2035 if (can_be_compiled(m, comp_level)) { 2036 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) { 2037 // Give sweeper a chance to keep up with CTW 2038 VM_CTWThreshold op; 2039 VMThread::execute(&op); 2040 _codecache_sweep_counter = 0; 2041 } 2042 // Force compilation 2043 CompileBroker::compile_method(m, InvocationEntryBci, comp_level, 2044 methodHandle(), 0, CompileTask::Reason_CTW, THREAD); 2045 if (HAS_PENDING_EXCEPTION) { 2046 clear_pending_exception_if_not_oom(CHECK); 2047 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 2048 } else { 2049 _compile_the_world_method_counter++; 2050 } 2051 if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) { 2052 // Clobber the first compile and force second tier compilation 2053 CompiledMethod* nm = m->code(); 2054 if (nm != NULL && !m->is_method_handle_intrinsic()) { 2055 // Throw out the code so that the code cache doesn't fill up 2056 nm->make_not_entrant(); 2057 } 2058 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization, 2059 methodHandle(), 0, CompileTask::Reason_CTW, THREAD); 2060 if (HAS_PENDING_EXCEPTION) { 2061 clear_pending_exception_if_not_oom(CHECK); 2062 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 2063 } else { 2064 _compile_the_world_method_counter++; 2065 } 2066 } 2067 } else { 2068 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 2069 } 2070 2071 CompiledMethod* nm = m->code(); 2072 if (nm != NULL && !m->is_method_handle_intrinsic()) { 2073 // Throw out the code so that the code cache doesn't fill up 2074 nm->make_not_entrant(); 2075 } 2076 } 2077 } 2078 } 2079 } 2080 } 2081 } 2082 2083 #endif //PRODUCT 2084 2085 // Please keep following two functions at end of this file. With them placed at top or in middle of the file, 2086 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589. 2087 void PerfClassTraceTime::initialize() { 2088 if (!UsePerfData) return; 2089 2090 if (_eventp != NULL) { 2091 // increment the event counter 2092 _eventp->inc(); 2093 } 2094 2095 // stop the current active thread-local timer to measure inclusive time 2096 _prev_active_event = -1; 2097 for (int i=0; i < EVENT_TYPE_COUNT; i++) { 2098 if (_timers[i].is_active()) { 2099 assert(_prev_active_event == -1, "should have only one active timer"); 2100 _prev_active_event = i; 2101 _timers[i].stop(); 2102 } 2103 } 2104 2105 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) { 2106 // start the inclusive timer if not recursively called 2107 _t.start(); 2108 } 2109 2110 // start thread-local timer of the given event type 2111 if (!_timers[_event_type].is_active()) { 2112 _timers[_event_type].start(); 2113 } 2114 } 2115 2116 PerfClassTraceTime::~PerfClassTraceTime() { 2117 if (!UsePerfData) return; 2118 2119 // stop the thread-local timer as the event completes 2120 // and resume the thread-local timer of the event next on the stack 2121 _timers[_event_type].stop(); 2122 jlong selftime = _timers[_event_type].ticks(); 2123 2124 if (_prev_active_event >= 0) { 2125 _timers[_prev_active_event].start(); 2126 } 2127 2128 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return; 2129 2130 // increment the counters only on the leaf call 2131 _t.stop(); 2132 _timep->inc(_t.ticks()); 2133 if (_selftimep != NULL) { 2134 _selftimep->inc(selftime); 2135 } 2136 // add all class loading related event selftime to the accumulated time counter 2137 ClassLoader::perf_accumulated_time()->inc(selftime); 2138 2139 // reset the timer 2140 _timers[_event_type].reset(); 2141 }