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 #if INCLUDE_CDS 640 void ClassLoader::check_shared_classpath(const char *path) { 641 if (strcmp(path, "") == 0) { 642 exit_with_path_failure("Cannot have empty path in archived classpaths", NULL); 643 } 644 645 struct stat st; 646 if (os::stat(path, &st) == 0) { 647 if ((st.st_mode & S_IFMT) != S_IFREG) { // is not a regular file 648 if (!os::dir_is_empty(path)) { 649 tty->print_cr("Error: non-empty directory '%s'", path); 650 exit_with_path_failure("CDS allows only empty directories in archived classpaths", NULL); 651 } 652 } 653 } 654 } 655 #endif 656 657 void ClassLoader::setup_bootstrap_search_path() { 658 const char* sys_class_path = Arguments::get_sysclasspath(); 659 if (PrintSharedArchiveAndExit) { 660 // Don't print sys_class_path - this is the bootcp of this current VM process, not necessarily 661 // the same as the bootcp of the shared archive. 662 } else { 663 trace_class_path("bootstrap loader class path=", sys_class_path); 664 } 665 #if INCLUDE_CDS 666 if (DumpSharedSpaces) { 667 _shared_paths_misc_info->add_boot_classpath(sys_class_path); 668 } 669 #endif 670 setup_boot_search_path(sys_class_path); 671 } 672 673 #if INCLUDE_CDS 674 int ClassLoader::get_shared_paths_misc_info_size() { 675 return _shared_paths_misc_info->get_used_bytes(); 676 } 677 678 void* ClassLoader::get_shared_paths_misc_info() { 679 return _shared_paths_misc_info->buffer(); 680 } 681 682 bool ClassLoader::check_shared_paths_misc_info(void *buf, int size) { 683 SharedPathsMiscInfo* checker = SharedClassUtil::allocate_shared_paths_misc_info((char*)buf, size); 684 bool result = checker->check(); 685 delete checker; 686 return result; 687 } 688 689 void ClassLoader::setup_app_search_path(const char *class_path) { 690 691 assert(DumpSharedSpaces, "Sanity"); 692 693 Thread* THREAD = Thread::current(); 694 int len = (int)strlen(class_path); 695 int end = 0; 696 697 // Iterate over class path entries 698 for (int start = 0; start < len; start = end) { 699 while (class_path[end] && class_path[end] != os::path_separator()[0]) { 700 end++; 701 } 702 EXCEPTION_MARK; 703 ResourceMark rm(THREAD); 704 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1); 705 strncpy(path, &class_path[start], end - start); 706 path[end - start] = '\0'; 707 708 update_class_path_entry_list(path, false, false); 709 710 while (class_path[end] == os::path_separator()[0]) { 711 end++; 712 } 713 } 714 } 715 716 void ClassLoader::add_to_module_path_entries(const char* path, 717 ClassPathEntry* entry) { 718 assert(entry != NULL, "ClassPathEntry should not be NULL"); 719 assert(DumpSharedSpaces, "dump time only"); 720 721 // The entry does not exist, add to the list 722 if (_module_path_entries == NULL) { 723 assert(_last_module_path_entry == NULL, "Sanity"); 724 _module_path_entries = _last_module_path_entry = entry; 725 } else { 726 _last_module_path_entry->set_next(entry); 727 _last_module_path_entry = entry; 728 } 729 } 730 731 // Add a module path to the _module_path_entries list. 732 void ClassLoader::update_module_path_entry_list(const char *path, TRAPS) { 733 assert(DumpSharedSpaces, "dump time only"); 734 struct stat st; 735 int ret = os::stat(path, &st); 736 assert(ret == 0, "module path must exist"); 737 // File or directory found 738 ClassPathEntry* new_entry = NULL; 739 new_entry = create_class_path_entry(path, &st, true /* throw_exception */, 740 false /*is_boot_append */, CHECK); 741 if (new_entry == NULL) { 742 return; 743 } 744 745 add_to_module_path_entries(path, new_entry); 746 return; 747 } 748 749 void ClassLoader::setup_module_search_path(const char* path, TRAPS) { 750 update_module_path_entry_list(path, THREAD); 751 } 752 #endif // INCLUDE_CDS 753 754 // Construct the array of module/path pairs as specified to --patch-module 755 // for the boot loader to search ahead of the jimage, if the class being 756 // loaded is defined to a module that has been specified to --patch-module. 757 void ClassLoader::setup_patch_mod_entries() { 758 Thread* THREAD = Thread::current(); 759 GrowableArray<ModulePatchPath*>* patch_mod_args = Arguments::get_patch_mod_prefix(); 760 int num_of_entries = patch_mod_args->length(); 761 762 763 // Set up the boot loader's _patch_mod_entries list 764 _patch_mod_entries = new (ResourceObj::C_HEAP, mtModule) GrowableArray<ModuleClassPathList*>(num_of_entries, true); 765 766 for (int i = 0; i < num_of_entries; i++) { 767 const char* module_name = (patch_mod_args->at(i))->module_name(); 768 Symbol* const module_sym = SymbolTable::lookup(module_name, (int)strlen(module_name), CHECK); 769 assert(module_sym != NULL, "Failed to obtain Symbol for module name"); 770 ModuleClassPathList* module_cpl = new ModuleClassPathList(module_sym); 771 772 char* class_path = (patch_mod_args->at(i))->path_string(); 773 int len = (int)strlen(class_path); 774 int end = 0; 775 // Iterate over the module's class path entries 776 for (int start = 0; start < len; start = end) { 777 while (class_path[end] && class_path[end] != os::path_separator()[0]) { 778 end++; 779 } 780 EXCEPTION_MARK; 781 ResourceMark rm(THREAD); 782 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1); 783 strncpy(path, &class_path[start], end - start); 784 path[end - start] = '\0'; 785 786 struct stat st; 787 if (os::stat(path, &st) == 0) { 788 // File or directory found 789 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK); 790 // If the path specification is valid, enter it into this module's list 791 if (new_entry != NULL) { 792 module_cpl->add_to_list(new_entry); 793 } 794 } 795 796 while (class_path[end] == os::path_separator()[0]) { 797 end++; 798 } 799 } 800 801 // Record the module into the list of --patch-module entries only if 802 // valid ClassPathEntrys have been created 803 if (module_cpl->module_first_entry() != NULL) { 804 _patch_mod_entries->push(module_cpl); 805 } 806 } 807 } 808 809 // Determine whether the module has been patched via the command-line 810 // option --patch-module 811 bool ClassLoader::is_in_patch_mod_entries(Symbol* module_name) { 812 if (_patch_mod_entries != NULL && _patch_mod_entries->is_nonempty()) { 813 int table_len = _patch_mod_entries->length(); 814 for (int i = 0; i < table_len; i++) { 815 ModuleClassPathList* patch_mod = _patch_mod_entries->at(i); 816 if (module_name->fast_compare(patch_mod->module_name()) == 0) { 817 return true; 818 } 819 } 820 } 821 return false; 822 } 823 824 // Set up the _jrt_entry if present and boot append path 825 void ClassLoader::setup_boot_search_path(const char *class_path) { 826 int len = (int)strlen(class_path); 827 int end = 0; 828 bool set_base_piece = true; 829 830 #if INCLUDE_CDS 831 if (DumpSharedSpaces) { 832 if (!Arguments::has_jimage()) { 833 vm_exit_during_initialization("CDS is not supported in exploded JDK build", NULL); 834 } 835 } 836 #endif 837 838 // Iterate over class path entries 839 for (int start = 0; start < len; start = end) { 840 while (class_path[end] && class_path[end] != os::path_separator()[0]) { 841 end++; 842 } 843 EXCEPTION_MARK; 844 ResourceMark rm(THREAD); 845 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1); 846 strncpy(path, &class_path[start], end - start); 847 path[end - start] = '\0'; 848 849 if (set_base_piece) { 850 // The first time through the bootstrap_search setup, it must be determined 851 // what the base or core piece of the boot loader search is. Either a java runtime 852 // image is present or this is an exploded module build situation. 853 assert(string_ends_with(path, MODULES_IMAGE_NAME) || string_ends_with(path, JAVA_BASE_NAME), 854 "Incorrect boot loader search path, no java runtime image or " JAVA_BASE_NAME " exploded build"); 855 struct stat st; 856 if (os::stat(path, &st) == 0) { 857 // Directory found 858 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK); 859 860 // Check for a jimage 861 if (Arguments::has_jimage()) { 862 assert(_jrt_entry == NULL, "should not setup bootstrap class search path twice"); 863 assert(new_entry != NULL && new_entry->is_modules_image(), "No java runtime image present"); 864 _jrt_entry = new_entry; 865 assert(_jrt_entry->jimage() != NULL, "No java runtime image"); 866 } 867 } else { 868 // If path does not exist, exit 869 vm_exit_during_initialization("Unable to establish the boot loader search path", path); 870 } 871 set_base_piece = false; 872 } else { 873 // Every entry on the system boot class path after the initial base piece, 874 // which is set by os::set_boot_path(), is considered an appended entry. 875 update_class_path_entry_list(path, false, true); 876 } 877 878 while (class_path[end] == os::path_separator()[0]) { 879 end++; 880 } 881 } 882 } 883 884 // During an exploded modules build, each module defined to the boot loader 885 // will be added to the ClassLoader::_exploded_entries array. 886 void ClassLoader::add_to_exploded_build_list(Symbol* module_sym, TRAPS) { 887 assert(!ClassLoader::has_jrt_entry(), "Exploded build not applicable"); 888 assert(_exploded_entries != NULL, "_exploded_entries was not initialized"); 889 890 // Find the module's symbol 891 ResourceMark rm(THREAD); 892 const char *module_name = module_sym->as_C_string(); 893 const char *home = Arguments::get_java_home(); 894 const char file_sep = os::file_separator()[0]; 895 // 10 represents the length of "modules" + 2 file separators + \0 896 size_t len = strlen(home) + strlen(module_name) + 10; 897 char *path = NEW_RESOURCE_ARRAY(char, len); 898 jio_snprintf(path, len, "%s%cmodules%c%s", home, file_sep, file_sep, module_name); 899 900 struct stat st; 901 if (os::stat(path, &st) == 0) { 902 // Directory found 903 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK); 904 905 // If the path specification is valid, enter it into this module's list. 906 // There is no need to check for duplicate modules in the exploded entry list, 907 // since no two modules with the same name can be defined to the boot loader. 908 // This is checked at module definition time in Modules::define_module. 909 if (new_entry != NULL) { 910 ModuleClassPathList* module_cpl = new ModuleClassPathList(module_sym); 911 module_cpl->add_to_list(new_entry); 912 { 913 MutexLocker ml(Module_lock, THREAD); 914 _exploded_entries->push(module_cpl); 915 } 916 log_info(class, load)("path: %s", path); 917 } 918 } 919 } 920 921 ClassPathEntry* ClassLoader::create_class_path_entry(const char *path, const struct stat* st, 922 bool throw_exception, 923 bool is_boot_append, TRAPS) { 924 JavaThread* thread = JavaThread::current(); 925 ClassPathEntry* new_entry = NULL; 926 if ((st->st_mode & S_IFMT) == S_IFREG) { 927 ResourceMark rm(thread); 928 // Regular file, should be a zip or jimage file 929 // Canonicalized filename 930 char* canonical_path = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, JVM_MAXPATHLEN); 931 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 932 // This matches the classic VM 933 if (throw_exception) { 934 THROW_MSG_(vmSymbols::java_io_IOException(), "Bad pathname", NULL); 935 } else { 936 return NULL; 937 } 938 } 939 jint error; 940 JImageFile* jimage =(*JImageOpen)(canonical_path, &error); 941 if (jimage != NULL) { 942 new_entry = new ClassPathImageEntry(jimage, canonical_path); 943 } else { 944 char* error_msg = NULL; 945 jzfile* zip; 946 { 947 // enable call to C land 948 ThreadToNativeFromVM ttn(thread); 949 HandleMark hm(thread); 950 zip = (*ZipOpen)(canonical_path, &error_msg); 951 } 952 if (zip != NULL && error_msg == NULL) { 953 new_entry = new ClassPathZipEntry(zip, path, is_boot_append); 954 } else { 955 char *msg; 956 if (error_msg == NULL) { 957 msg = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, strlen(path) + 128); ; 958 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path); 959 } else { 960 int len = (int)(strlen(path) + strlen(error_msg) + 128); 961 msg = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, len); ; 962 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path); 963 } 964 // Don't complain about bad jar files added via -Xbootclasspath/a:. 965 if (throw_exception && is_init_completed()) { 966 THROW_MSG_(vmSymbols::java_lang_ClassNotFoundException(), msg, NULL); 967 } else { 968 return NULL; 969 } 970 } 971 } 972 log_info(class, path)("opened: %s", path); 973 log_info(class, load)("opened: %s", path); 974 } else { 975 // Directory 976 new_entry = new ClassPathDirEntry(path); 977 log_info(class, load)("path: %s", path); 978 } 979 return new_entry; 980 } 981 982 983 // Create a class path zip entry for a given path (return NULL if not found 984 // or zip/JAR file cannot be opened) 985 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path, bool is_boot_append) { 986 // check for a regular file 987 struct stat st; 988 if (os::stat(path, &st) == 0) { 989 if ((st.st_mode & S_IFMT) == S_IFREG) { 990 char canonical_path[JVM_MAXPATHLEN]; 991 if (get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 992 char* error_msg = NULL; 993 jzfile* zip; 994 { 995 // enable call to C land 996 JavaThread* thread = JavaThread::current(); 997 ThreadToNativeFromVM ttn(thread); 998 HandleMark hm(thread); 999 zip = (*ZipOpen)(canonical_path, &error_msg); 1000 } 1001 if (zip != NULL && error_msg == NULL) { 1002 // create using canonical path 1003 return new ClassPathZipEntry(zip, canonical_path, is_boot_append); 1004 } 1005 } 1006 } 1007 } 1008 return NULL; 1009 } 1010 1011 // returns true if entry already on class path 1012 bool ClassLoader::contains_append_entry(const char* name) { 1013 ClassPathEntry* e = _first_append_entry; 1014 while (e != NULL) { 1015 // assume zip entries have been canonicalized 1016 if (strcmp(name, e->name()) == 0) { 1017 return true; 1018 } 1019 e = e->next(); 1020 } 1021 return false; 1022 } 1023 1024 void ClassLoader::add_to_boot_append_entries(ClassPathEntry *new_entry) { 1025 if (new_entry != NULL) { 1026 if (_last_append_entry == NULL) { 1027 assert(_first_append_entry == NULL, "boot loader's append class path entry list not empty"); 1028 _first_append_entry = _last_append_entry = new_entry; 1029 } else { 1030 _last_append_entry->set_next(new_entry); 1031 _last_append_entry = new_entry; 1032 } 1033 } 1034 } 1035 1036 // Record the path entries specified in -cp during dump time. The recorded 1037 // information will be used at runtime for loading the archived app classes. 1038 // 1039 // Note that at dump time, ClassLoader::_app_classpath_entries are NOT used for 1040 // loading app classes. Instead, the app class are loaded by the 1041 // jdk/internal/loader/ClassLoaders$AppClassLoader instance. 1042 void ClassLoader::add_to_app_classpath_entries(const char* path, 1043 ClassPathEntry* entry, 1044 bool check_for_duplicates) { 1045 #if INCLUDE_CDS 1046 assert(entry != NULL, "ClassPathEntry should not be NULL"); 1047 ClassPathEntry* e = _app_classpath_entries; 1048 if (check_for_duplicates) { 1049 while (e != NULL) { 1050 if (strcmp(e->name(), entry->name()) == 0) { 1051 // entry already exists 1052 return; 1053 } 1054 e = e->next(); 1055 } 1056 } 1057 1058 // The entry does not exist, add to the list 1059 if (_app_classpath_entries == NULL) { 1060 assert(_last_app_classpath_entry == NULL, "Sanity"); 1061 _app_classpath_entries = _last_app_classpath_entry = entry; 1062 } else { 1063 _last_app_classpath_entry->set_next(entry); 1064 _last_app_classpath_entry = entry; 1065 } 1066 1067 if (entry->is_jar_file()) { 1068 ClassLoaderExt::process_jar_manifest(entry, check_for_duplicates); 1069 } 1070 #endif 1071 } 1072 1073 // Returns true IFF the file/dir exists and the entry was successfully created. 1074 bool ClassLoader::update_class_path_entry_list(const char *path, 1075 bool check_for_duplicates, 1076 bool is_boot_append, 1077 bool throw_exception) { 1078 struct stat st; 1079 if (os::stat(path, &st) == 0) { 1080 // File or directory found 1081 ClassPathEntry* new_entry = NULL; 1082 Thread* THREAD = Thread::current(); 1083 new_entry = create_class_path_entry(path, &st, throw_exception, is_boot_append, CHECK_(false)); 1084 if (new_entry == NULL) { 1085 return false; 1086 } 1087 1088 // Do not reorder the bootclasspath which would break get_system_package(). 1089 // Add new entry to linked list 1090 if (is_boot_append) { 1091 add_to_boot_append_entries(new_entry); 1092 } else { 1093 add_to_app_classpath_entries(path, new_entry, check_for_duplicates); 1094 } 1095 return true; 1096 } else { 1097 #if INCLUDE_CDS 1098 if (DumpSharedSpaces) { 1099 _shared_paths_misc_info->add_nonexist_path(path); 1100 } 1101 #endif 1102 return false; 1103 } 1104 } 1105 1106 static void print_module_entry_table(const GrowableArray<ModuleClassPathList*>* const module_list) { 1107 ResourceMark rm; 1108 int num_of_entries = module_list->length(); 1109 for (int i = 0; i < num_of_entries; i++) { 1110 ClassPathEntry* e; 1111 ModuleClassPathList* mpl = module_list->at(i); 1112 tty->print("%s=", mpl->module_name()->as_C_string()); 1113 e = mpl->module_first_entry(); 1114 while (e != NULL) { 1115 tty->print("%s", e->name()); 1116 e = e->next(); 1117 if (e != NULL) { 1118 tty->print("%s", os::path_separator()); 1119 } 1120 } 1121 tty->print(" ;"); 1122 } 1123 } 1124 1125 void ClassLoader::print_bootclasspath() { 1126 ClassPathEntry* e; 1127 tty->print("[bootclasspath= "); 1128 1129 // Print --patch-module module/path specifications first 1130 if (_patch_mod_entries != NULL) { 1131 print_module_entry_table(_patch_mod_entries); 1132 } 1133 1134 // [jimage | exploded modules build] 1135 if (has_jrt_entry()) { 1136 // Print the location of the java runtime image 1137 tty->print("%s ;", _jrt_entry->name()); 1138 } else { 1139 // Print exploded module build path specifications 1140 if (_exploded_entries != NULL) { 1141 print_module_entry_table(_exploded_entries); 1142 } 1143 } 1144 1145 // appended entries 1146 e = _first_append_entry; 1147 while (e != NULL) { 1148 tty->print("%s ;", e->name()); 1149 e = e->next(); 1150 } 1151 tty->print_cr("]"); 1152 } 1153 1154 void ClassLoader::load_zip_library() { 1155 assert(ZipOpen == NULL, "should not load zip library twice"); 1156 // First make sure native library is loaded 1157 os::native_java_library(); 1158 // Load zip library 1159 char path[JVM_MAXPATHLEN]; 1160 char ebuf[1024]; 1161 void* handle = NULL; 1162 if (os::dll_locate_lib(path, sizeof(path), Arguments::get_dll_dir(), "zip")) { 1163 handle = os::dll_load(path, ebuf, sizeof ebuf); 1164 } 1165 if (handle == NULL) { 1166 vm_exit_during_initialization("Unable to load ZIP library", path); 1167 } 1168 // Lookup zip entry points 1169 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open")); 1170 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close")); 1171 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry")); 1172 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry")); 1173 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry")); 1174 ZipInflateFully = CAST_TO_FN_PTR(ZipInflateFully_t, os::dll_lookup(handle, "ZIP_InflateFully")); 1175 Crc32 = CAST_TO_FN_PTR(Crc32_t, os::dll_lookup(handle, "ZIP_CRC32")); 1176 1177 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL 1178 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || 1179 GetNextEntry == NULL || Crc32 == NULL) { 1180 vm_exit_during_initialization("Corrupted ZIP library", path); 1181 } 1182 1183 if (ZipInflateFully == NULL) { 1184 vm_exit_during_initialization("Corrupted ZIP library ZIP_InflateFully missing", path); 1185 } 1186 1187 // Lookup canonicalize entry in libjava.dll 1188 void *javalib_handle = os::native_java_library(); 1189 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize")); 1190 // This lookup only works on 1.3. Do not check for non-null here 1191 } 1192 1193 void ClassLoader::load_jimage_library() { 1194 // First make sure native library is loaded 1195 os::native_java_library(); 1196 // Load jimage library 1197 char path[JVM_MAXPATHLEN]; 1198 char ebuf[1024]; 1199 void* handle = NULL; 1200 if (os::dll_locate_lib(path, sizeof(path), Arguments::get_dll_dir(), "jimage")) { 1201 handle = os::dll_load(path, ebuf, sizeof ebuf); 1202 } 1203 if (handle == NULL) { 1204 vm_exit_during_initialization("Unable to load jimage library", path); 1205 } 1206 1207 // Lookup jimage entry points 1208 JImageOpen = CAST_TO_FN_PTR(JImageOpen_t, os::dll_lookup(handle, "JIMAGE_Open")); 1209 guarantee(JImageOpen != NULL, "function JIMAGE_Open not found"); 1210 JImageClose = CAST_TO_FN_PTR(JImageClose_t, os::dll_lookup(handle, "JIMAGE_Close")); 1211 guarantee(JImageClose != NULL, "function JIMAGE_Close not found"); 1212 JImagePackageToModule = CAST_TO_FN_PTR(JImagePackageToModule_t, os::dll_lookup(handle, "JIMAGE_PackageToModule")); 1213 guarantee(JImagePackageToModule != NULL, "function JIMAGE_PackageToModule not found"); 1214 JImageFindResource = CAST_TO_FN_PTR(JImageFindResource_t, os::dll_lookup(handle, "JIMAGE_FindResource")); 1215 guarantee(JImageFindResource != NULL, "function JIMAGE_FindResource not found"); 1216 JImageGetResource = CAST_TO_FN_PTR(JImageGetResource_t, os::dll_lookup(handle, "JIMAGE_GetResource")); 1217 guarantee(JImageGetResource != NULL, "function JIMAGE_GetResource not found"); 1218 JImageResourceIterator = CAST_TO_FN_PTR(JImageResourceIterator_t, os::dll_lookup(handle, "JIMAGE_ResourceIterator")); 1219 guarantee(JImageResourceIterator != NULL, "function JIMAGE_ResourceIterator not found"); 1220 JImageResourcePath = CAST_TO_FN_PTR(JImage_ResourcePath_t, os::dll_lookup(handle, "JIMAGE_ResourcePath")); 1221 guarantee(JImageResourcePath != NULL, "function JIMAGE_ResourcePath not found"); 1222 } 1223 1224 jboolean ClassLoader::decompress(void *in, u8 inSize, void *out, u8 outSize, char **pmsg) { 1225 return (*ZipInflateFully)(in, inSize, out, outSize, pmsg); 1226 } 1227 1228 int ClassLoader::crc32(int crc, const char* buf, int len) { 1229 assert(Crc32 != NULL, "ZIP_CRC32 is not found"); 1230 return (*Crc32)(crc, (const jbyte*)buf, len); 1231 } 1232 1233 // Function add_package extracts the package from the fully qualified class name 1234 // and checks if the package is in the boot loader's package entry table. If so, 1235 // then it sets the classpath_index in the package entry record. 1236 // 1237 // The classpath_index field is used to find the entry on the boot loader class 1238 // path for packages with classes loaded by the boot loader from -Xbootclasspath/a 1239 // in an unnamed module. It is also used to indicate (for all packages whose 1240 // classes are loaded by the boot loader) that at least one of the package's 1241 // classes has been loaded. 1242 bool ClassLoader::add_package(const char *fullq_class_name, s2 classpath_index, TRAPS) { 1243 assert(fullq_class_name != NULL, "just checking"); 1244 1245 // Get package name from fully qualified class name. 1246 ResourceMark rm; 1247 const char *cp = package_from_name(fullq_class_name); 1248 if (cp != NULL) { 1249 PackageEntryTable* pkg_entry_tbl = ClassLoaderData::the_null_class_loader_data()->packages(); 1250 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(cp, CHECK_false); 1251 PackageEntry* pkg_entry = pkg_entry_tbl->lookup_only(pkg_symbol); 1252 if (pkg_entry != NULL) { 1253 assert(classpath_index != -1, "Unexpected classpath_index"); 1254 pkg_entry->set_classpath_index(classpath_index); 1255 } else { 1256 return false; 1257 } 1258 } 1259 return true; 1260 } 1261 1262 oop ClassLoader::get_system_package(const char* name, TRAPS) { 1263 // Look up the name in the boot loader's package entry table. 1264 if (name != NULL) { 1265 TempNewSymbol package_sym = SymbolTable::new_symbol(name, (int)strlen(name), CHECK_NULL); 1266 // Look for the package entry in the boot loader's package entry table. 1267 PackageEntry* package = 1268 ClassLoaderData::the_null_class_loader_data()->packages()->lookup_only(package_sym); 1269 1270 // Return NULL if package does not exist or if no classes in that package 1271 // have been loaded. 1272 if (package != NULL && package->has_loaded_class()) { 1273 ModuleEntry* module = package->module(); 1274 if (module->location() != NULL) { 1275 ResourceMark rm(THREAD); 1276 Handle ml = java_lang_String::create_from_str( 1277 module->location()->as_C_string(), THREAD); 1278 return ml(); 1279 } 1280 // Return entry on boot loader class path. 1281 Handle cph = java_lang_String::create_from_str( 1282 ClassLoader::classpath_entry(package->classpath_index())->name(), THREAD); 1283 return cph(); 1284 } 1285 } 1286 return NULL; 1287 } 1288 1289 objArrayOop ClassLoader::get_system_packages(TRAPS) { 1290 ResourceMark rm(THREAD); 1291 // List of pointers to PackageEntrys that have loaded classes. 1292 GrowableArray<PackageEntry*>* loaded_class_pkgs = new GrowableArray<PackageEntry*>(50); 1293 { 1294 MutexLocker ml(Module_lock, THREAD); 1295 1296 PackageEntryTable* pe_table = 1297 ClassLoaderData::the_null_class_loader_data()->packages(); 1298 1299 // Collect the packages that have at least one loaded class. 1300 for (int x = 0; x < pe_table->table_size(); x++) { 1301 for (PackageEntry* package_entry = pe_table->bucket(x); 1302 package_entry != NULL; 1303 package_entry = package_entry->next()) { 1304 if (package_entry->has_loaded_class()) { 1305 loaded_class_pkgs->append(package_entry); 1306 } 1307 } 1308 } 1309 } 1310 1311 1312 // Allocate objArray and fill with java.lang.String 1313 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 1314 loaded_class_pkgs->length(), CHECK_NULL); 1315 objArrayHandle result(THREAD, r); 1316 for (int x = 0; x < loaded_class_pkgs->length(); x++) { 1317 PackageEntry* package_entry = loaded_class_pkgs->at(x); 1318 Handle str = java_lang_String::create_from_symbol(package_entry->name(), CHECK_NULL); 1319 result->obj_at_put(x, str()); 1320 } 1321 return result(); 1322 } 1323 1324 // caller needs ResourceMark 1325 const char* ClassLoader::file_name_for_class_name(const char* class_name, 1326 int class_name_len) { 1327 assert(class_name != NULL, "invariant"); 1328 assert((int)strlen(class_name) == class_name_len, "invariant"); 1329 1330 static const char class_suffix[] = ".class"; 1331 1332 char* const file_name = NEW_RESOURCE_ARRAY(char, 1333 class_name_len + 1334 sizeof(class_suffix)); // includes term NULL 1335 1336 strncpy(file_name, class_name, class_name_len); 1337 strncpy(&file_name[class_name_len], class_suffix, sizeof(class_suffix)); 1338 1339 return file_name; 1340 } 1341 1342 ClassPathEntry* find_first_module_cpe(ModuleEntry* mod_entry, 1343 const GrowableArray<ModuleClassPathList*>* const module_list) { 1344 int num_of_entries = module_list->length(); 1345 const Symbol* class_module_name = mod_entry->name(); 1346 1347 // Loop through all the modules in either the patch-module or exploded entries looking for module 1348 for (int i = 0; i < num_of_entries; i++) { 1349 ModuleClassPathList* module_cpl = module_list->at(i); 1350 Symbol* module_cpl_name = module_cpl->module_name(); 1351 1352 if (module_cpl_name->fast_compare(class_module_name) == 0) { 1353 // Class' module has been located. 1354 return module_cpl->module_first_entry(); 1355 } 1356 } 1357 return NULL; 1358 } 1359 1360 1361 // Search either the patch-module or exploded build entries for class. 1362 ClassFileStream* ClassLoader::search_module_entries(const GrowableArray<ModuleClassPathList*>* const module_list, 1363 const char* const class_name, 1364 const char* const file_name, 1365 TRAPS) { 1366 ClassFileStream* stream = NULL; 1367 1368 // Find the class' defining module in the boot loader's module entry table 1369 PackageEntry* pkg_entry = get_package_entry(class_name, ClassLoaderData::the_null_class_loader_data(), CHECK_NULL); 1370 ModuleEntry* mod_entry = (pkg_entry != NULL) ? pkg_entry->module() : NULL; 1371 1372 // If the module system has not defined java.base yet, then 1373 // classes loaded are assumed to be defined to java.base. 1374 // When java.base is eventually defined by the module system, 1375 // all packages of classes that have been previously loaded 1376 // are verified in ModuleEntryTable::verify_javabase_packages(). 1377 if (!Universe::is_module_initialized() && 1378 !ModuleEntryTable::javabase_defined() && 1379 mod_entry == NULL) { 1380 mod_entry = ModuleEntryTable::javabase_moduleEntry(); 1381 } 1382 1383 // The module must be a named module 1384 ClassPathEntry* e = NULL; 1385 if (mod_entry != NULL && mod_entry->is_named()) { 1386 if (module_list == _exploded_entries) { 1387 // The exploded build entries can be added to at any time so a lock is 1388 // needed when searching them. 1389 assert(!ClassLoader::has_jrt_entry(), "Must be exploded build"); 1390 MutexLocker ml(Module_lock, THREAD); 1391 e = find_first_module_cpe(mod_entry, module_list); 1392 } else { 1393 e = find_first_module_cpe(mod_entry, module_list); 1394 } 1395 } 1396 1397 // Try to load the class from the module's ClassPathEntry list. 1398 while (e != NULL) { 1399 stream = e->open_stream(file_name, CHECK_NULL); 1400 // No context.check is required since CDS is not supported 1401 // for an exploded modules build or if --patch-module is specified. 1402 if (NULL != stream) { 1403 return stream; 1404 } 1405 e = e->next(); 1406 } 1407 // If the module was located, break out even if the class was not 1408 // located successfully from that module's ClassPathEntry list. 1409 // There will not be another valid entry for that module. 1410 return NULL; 1411 } 1412 1413 // Called by the boot classloader to load classes 1414 InstanceKlass* ClassLoader::load_class(Symbol* name, bool search_append_only, TRAPS) { 1415 assert(name != NULL, "invariant"); 1416 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 1417 1418 ResourceMark rm(THREAD); 1419 HandleMark hm(THREAD); 1420 1421 const char* const class_name = name->as_C_string(); 1422 1423 EventMark m("loading class %s", class_name); 1424 1425 const char* const file_name = file_name_for_class_name(class_name, 1426 name->utf8_length()); 1427 assert(file_name != NULL, "invariant"); 1428 1429 ClassLoaderExt::Context context(class_name, file_name, THREAD); 1430 1431 // Lookup stream for parsing .class file 1432 ClassFileStream* stream = NULL; 1433 s2 classpath_index = 0; 1434 ClassPathEntry* e = NULL; 1435 1436 // If DumpSharedSpaces is true boot loader visibility boundaries are set to: 1437 // - [jimage] + [_first_append_entry to _last_append_entry] (all path entries). 1438 // 1439 // If search_append_only is true, boot loader visibility boundaries are 1440 // set to be _first_append_entry to the end. This includes: 1441 // [-Xbootclasspath/a]; [jvmti appended entries] 1442 // 1443 // If both DumpSharedSpaces and search_append_only are false, boot loader 1444 // visibility boundaries are set to be the --patch-module entries plus the base piece. 1445 // This would include: 1446 // [--patch-module=<module>=<file>(<pathsep><file>)*]; [jimage | exploded module build] 1447 // 1448 1449 // Load Attempt #1: --patch-module 1450 // Determine the class' defining module. If it appears in the _patch_mod_entries, 1451 // attempt to load the class from those locations specific to the module. 1452 // Specifications to --patch-module can contain a partial number of classes 1453 // that are part of the overall module definition. So if a particular class is not 1454 // found within its module specification, the search should continue to Load Attempt #2. 1455 // Note: The --patch-module entries are never searched if the boot loader's 1456 // visibility boundary is limited to only searching the append entries. 1457 if (_patch_mod_entries != NULL && !search_append_only) { 1458 // At CDS dump time, the --patch-module entries are ignored. That means a 1459 // class is still loaded from the runtime image even if it might 1460 // appear in the _patch_mod_entries. The runtime shared class visibility 1461 // check will determine if a shared class is visible based on the runtime 1462 // environemnt, including the runtime --patch-module setting. 1463 if (!DumpSharedSpaces) { 1464 stream = search_module_entries(_patch_mod_entries, class_name, file_name, CHECK_NULL); 1465 } 1466 } 1467 1468 // Load Attempt #2: [jimage | exploded build] 1469 if (!search_append_only && (NULL == stream)) { 1470 if (has_jrt_entry()) { 1471 e = _jrt_entry; 1472 stream = _jrt_entry->open_stream(file_name, CHECK_NULL); 1473 } else { 1474 // Exploded build - attempt to locate class in its defining module's location. 1475 assert(_exploded_entries != NULL, "No exploded build entries present"); 1476 stream = search_module_entries(_exploded_entries, class_name, file_name, CHECK_NULL); 1477 } 1478 } 1479 1480 // Load Attempt #3: [-Xbootclasspath/a]; [jvmti appended entries] 1481 if ((search_append_only || DumpSharedSpaces) && (NULL == stream)) { 1482 // For the boot loader append path search, the starting classpath_index 1483 // for the appended piece is always 1 to account for either the 1484 // _jrt_entry or the _exploded_entries. 1485 assert(classpath_index == 0, "The classpath_index has been incremented incorrectly"); 1486 classpath_index = 1; 1487 1488 e = _first_append_entry; 1489 while (e != NULL) { 1490 stream = e->open_stream(file_name, CHECK_NULL); 1491 if (NULL != stream) { 1492 break; 1493 } 1494 e = e->next(); 1495 ++classpath_index; 1496 } 1497 } 1498 1499 if (NULL == stream) { 1500 return NULL; 1501 } 1502 1503 stream->set_verify(context.should_verify(classpath_index)); 1504 1505 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); 1506 Handle protection_domain; 1507 1508 InstanceKlass* result = KlassFactory::create_from_stream(stream, 1509 name, 1510 loader_data, 1511 protection_domain, 1512 NULL, // host_klass 1513 NULL, // cp_patches 1514 THREAD); 1515 if (HAS_PENDING_EXCEPTION) { 1516 if (DumpSharedSpaces) { 1517 tty->print_cr("Preload Error: Failed to load %s", class_name); 1518 } 1519 return NULL; 1520 } 1521 1522 if (!add_package(file_name, classpath_index, THREAD)) { 1523 return NULL; 1524 } 1525 1526 return result; 1527 } 1528 1529 #if INCLUDE_CDS 1530 char* ClassLoader::skip_uri_protocol(char* source) { 1531 if (strncmp(source, "file:", 5) == 0) { 1532 // file: protocol path could start with file:/ or file:/// 1533 // locate the char after all the forward slashes 1534 int offset = 5; 1535 while (*(source + offset) == '/') { 1536 offset++; 1537 } 1538 source += offset; 1539 // for non-windows platforms, move back one char as the path begins with a '/' 1540 #ifndef _WINDOWS 1541 source -= 1; 1542 #endif 1543 } else if (strncmp(source, "jrt:/", 5) == 0) { 1544 source += 5; 1545 } 1546 return source; 1547 } 1548 1549 // Record the shared classpath index and loader type for classes loaded 1550 // by the builtin loaders at dump time. 1551 void ClassLoader::record_result(InstanceKlass* ik, const ClassFileStream* stream, TRAPS) { 1552 assert(DumpSharedSpaces, "sanity"); 1553 assert(stream != NULL, "sanity"); 1554 1555 if (ik->is_anonymous()) { 1556 // We do not archive anonymous classes. 1557 return; 1558 } 1559 1560 oop loader = ik->class_loader(); 1561 char* src = (char*)stream->source(); 1562 if (src == NULL) { 1563 if (loader == NULL) { 1564 // JFR classes 1565 ik->set_shared_classpath_index(0); 1566 ik->set_class_loader_type(ClassLoader::BOOT_LOADER); 1567 } 1568 return; 1569 } 1570 1571 assert(has_jrt_entry(), "CDS dumping does not support exploded JDK build"); 1572 1573 ResourceMark rm(THREAD); 1574 int classpath_index = -1; 1575 PackageEntry* pkg_entry = ik->package(); 1576 1577 if (FileMapInfo::get_number_of_shared_paths() > 0) { 1578 char* canonical_path = NEW_RESOURCE_ARRAY(char, JVM_MAXPATHLEN); 1579 1580 // save the path from the file: protocol or the module name from the jrt: protocol 1581 // if no protocol prefix is found, path is the same as stream->source() 1582 char* path = skip_uri_protocol(src); 1583 for (int i = 0; i < FileMapInfo::get_number_of_shared_paths(); i++) { 1584 SharedClassPathEntry* ent = FileMapInfo::shared_path(i); 1585 if (get_canonical_path(ent->name(), canonical_path, JVM_MAXPATHLEN)) { 1586 // If the path (from the class stream source) is the same as the shared 1587 // class or module path, then we have a match. 1588 if (strcmp(canonical_path, os::native_path((char*)path)) == 0) { 1589 // NULL pkg_entry and pkg_entry in an unnamed module implies the class 1590 // is from the -cp or boot loader append path which consists of -Xbootclasspath/a 1591 // and jvmti appended entries. 1592 if ((pkg_entry == NULL) || (pkg_entry->in_unnamed_module())) { 1593 // Ensure the index is within the -cp range before assigning 1594 // to the classpath_index. 1595 if (SystemDictionary::is_system_class_loader(loader) && 1596 (i >= ClassLoaderExt::app_class_paths_start_index()) && 1597 (i < ClassLoaderExt::app_module_paths_start_index())) { 1598 classpath_index = i; 1599 break; 1600 } else { 1601 if ((i >= 1) && 1602 (i < ClassLoaderExt::app_class_paths_start_index())) { 1603 // The class must be from boot loader append path which consists of 1604 // -Xbootclasspath/a and jvmti appended entries. 1605 assert(loader == NULL, "sanity"); 1606 classpath_index = i; 1607 break; 1608 } 1609 } 1610 } else { 1611 // A class from a named module from the --module-path. Ensure the index is 1612 // within the --module-path range before assigning to the classpath_index. 1613 if ((pkg_entry != NULL) && !(pkg_entry->in_unnamed_module()) && (i > 0)) { 1614 if (i >= ClassLoaderExt::app_module_paths_start_index() && 1615 i < FileMapInfo::get_number_of_shared_paths()) { 1616 classpath_index = i; 1617 break; 1618 } 1619 } 1620 } 1621 } 1622 // for index 0 and the stream->source() is the modules image or has the jrt: protocol. 1623 // The class must be from the runtime modules image. 1624 if (i == 0 && (is_modules_image(src) || string_starts_with(src, "jrt:"))) { 1625 classpath_index = i; 1626 break; 1627 } 1628 } 1629 } 1630 1631 // No path entry found for this class. Must be a shared class loaded by the 1632 // user defined classloader. 1633 if (classpath_index < 0) { 1634 assert(ik->shared_classpath_index() < 0, "Sanity"); 1635 return; 1636 } 1637 } else { 1638 // The shared path table is set up after module system initialization. 1639 // The path table contains no entry before that. Any classes loaded prior 1640 // to the setup of the shared path table must be from the modules image. 1641 assert(is_modules_image(src), "stream must be from modules image"); 1642 assert(FileMapInfo::get_number_of_shared_paths() == 0, "shared path table must not have been setup"); 1643 classpath_index = 0; 1644 } 1645 1646 const char* const class_name = ik->name()->as_C_string(); 1647 const char* const file_name = file_name_for_class_name(class_name, 1648 ik->name()->utf8_length()); 1649 assert(file_name != NULL, "invariant"); 1650 1651 ClassLoaderExt::Context context(class_name, file_name, CATCH); 1652 context.record_result(ik->name(), classpath_index, ik, THREAD); 1653 } 1654 #endif // INCLUDE_CDS 1655 1656 // Initialize the class loader's access to methods in libzip. Parse and 1657 // process the boot classpath into a list ClassPathEntry objects. Once 1658 // this list has been created, it must not change order (see class PackageInfo) 1659 // it can be appended to and is by jvmti and the kernel vm. 1660 1661 void ClassLoader::initialize() { 1662 EXCEPTION_MARK; 1663 1664 if (UsePerfData) { 1665 // jvmstat performance counters 1666 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time"); 1667 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime"); 1668 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self"); 1669 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime"); 1670 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self"); 1671 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime"); 1672 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self"); 1673 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses"); 1674 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses"); 1675 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses"); 1676 1677 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime"); 1678 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self"); 1679 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime"); 1680 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime"); 1681 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime"); 1682 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime"); 1683 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self"); 1684 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount"); 1685 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses"); 1686 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime"); 1687 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self"); 1688 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes"); 1689 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes"); 1690 1691 1692 // The following performance counters are added for measuring the impact 1693 // of the bug fix of 6365597. They are mainly focused on finding out 1694 // the behavior of system & user-defined classloader lock, whether 1695 // ClassLoader.loadClass/findClass is being called synchronized or not. 1696 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS, 1697 "systemLoaderLockContentionRate"); 1698 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS, 1699 "nonSystemLoaderLockContentionRate"); 1700 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS, 1701 "jvmFindLoadedClassNoLockCalls"); 1702 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS, 1703 "jvmDefineClassNoLockCalls"); 1704 1705 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS, 1706 "jniDefineClassNoLockCalls"); 1707 1708 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS, 1709 "unsafeDefineClassCalls"); 1710 1711 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS, 1712 "loadInstanceClassFailRate"); 1713 } 1714 1715 // lookup zip library entry points 1716 load_zip_library(); 1717 // lookup jimage library entry points 1718 load_jimage_library(); 1719 #if INCLUDE_CDS 1720 // initialize search path 1721 if (DumpSharedSpaces) { 1722 _shared_paths_misc_info = SharedClassUtil::allocate_shared_paths_misc_info(); 1723 } 1724 #endif 1725 setup_bootstrap_search_path(); 1726 } 1727 1728 #if INCLUDE_CDS 1729 void ClassLoader::initialize_shared_path() { 1730 if (DumpSharedSpaces) { 1731 ClassLoaderExt::setup_search_paths(); 1732 _shared_paths_misc_info->write_jint(0); // see comments in SharedPathsMiscInfo::check() 1733 } 1734 } 1735 1736 void ClassLoader::initialize_module_path(TRAPS) { 1737 if (DumpSharedSpaces) { 1738 ClassLoaderExt::setup_module_paths(THREAD); 1739 FileMapInfo::allocate_shared_path_table(); 1740 } 1741 } 1742 #endif 1743 1744 jlong ClassLoader::classloader_time_ms() { 1745 return UsePerfData ? 1746 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1; 1747 } 1748 1749 jlong ClassLoader::class_init_count() { 1750 return UsePerfData ? _perf_classes_inited->get_value() : -1; 1751 } 1752 1753 jlong ClassLoader::class_init_time_ms() { 1754 return UsePerfData ? 1755 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1; 1756 } 1757 1758 jlong ClassLoader::class_verify_time_ms() { 1759 return UsePerfData ? 1760 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1; 1761 } 1762 1763 jlong ClassLoader::class_link_count() { 1764 return UsePerfData ? _perf_classes_linked->get_value() : -1; 1765 } 1766 1767 jlong ClassLoader::class_link_time_ms() { 1768 return UsePerfData ? 1769 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1; 1770 } 1771 1772 int ClassLoader::compute_Object_vtable() { 1773 // hardwired for JDK1.2 -- would need to duplicate class file parsing 1774 // code to determine actual value from file 1775 // Would be value '11' if finals were in vtable 1776 int JDK_1_2_Object_vtable_size = 5; 1777 return JDK_1_2_Object_vtable_size * vtableEntry::size(); 1778 } 1779 1780 1781 void classLoader_init1() { 1782 ClassLoader::initialize(); 1783 } 1784 1785 // Complete the ClassPathEntry setup for the boot loader 1786 void ClassLoader::classLoader_init2(TRAPS) { 1787 // Setup the list of module/path pairs for --patch-module processing 1788 // This must be done after the SymbolTable is created in order 1789 // to use fast_compare on module names instead of a string compare. 1790 if (Arguments::get_patch_mod_prefix() != NULL) { 1791 setup_patch_mod_entries(); 1792 } 1793 1794 // Create the ModuleEntry for java.base (must occur after setup_patch_mod_entries 1795 // to successfully determine if java.base has been patched) 1796 create_javabase(); 1797 1798 // Setup the initial java.base/path pair for the exploded build entries. 1799 // As more modules are defined during module system initialization, more 1800 // entries will be added to the exploded build array. 1801 if (!has_jrt_entry()) { 1802 assert(!DumpSharedSpaces, "DumpSharedSpaces not supported with exploded module builds"); 1803 assert(!UseSharedSpaces, "UsedSharedSpaces not supported with exploded module builds"); 1804 // Set up the boot loader's _exploded_entries list. Note that this gets 1805 // done before loading any classes, by the same thread that will 1806 // subsequently do the first class load. So, no lock is needed for this. 1807 assert(_exploded_entries == NULL, "Should only get initialized once"); 1808 _exploded_entries = new (ResourceObj::C_HEAP, mtModule) 1809 GrowableArray<ModuleClassPathList*>(EXPLODED_ENTRY_SIZE, true); 1810 add_to_exploded_build_list(vmSymbols::java_base(), CHECK); 1811 } 1812 } 1813 1814 1815 bool ClassLoader::get_canonical_path(const char* orig, char* out, int len) { 1816 assert(orig != NULL && out != NULL && len > 0, "bad arguments"); 1817 if (CanonicalizeEntry != NULL) { 1818 JavaThread* THREAD = JavaThread::current(); 1819 JNIEnv* env = THREAD->jni_environment(); 1820 ResourceMark rm(THREAD); 1821 1822 // os::native_path writes into orig_copy 1823 char* orig_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, strlen(orig)+1); 1824 strcpy(orig_copy, orig); 1825 if ((CanonicalizeEntry)(env, os::native_path(orig_copy), out, len) < 0) { 1826 return false; 1827 } 1828 } else { 1829 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing 1830 strncpy(out, orig, len); 1831 out[len - 1] = '\0'; 1832 } 1833 return true; 1834 } 1835 1836 void ClassLoader::create_javabase() { 1837 Thread* THREAD = Thread::current(); 1838 1839 // Create java.base's module entry for the boot 1840 // class loader prior to loading j.l.Ojbect. 1841 ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data(); 1842 1843 // Get module entry table 1844 ModuleEntryTable* null_cld_modules = null_cld->modules(); 1845 if (null_cld_modules == NULL) { 1846 vm_exit_during_initialization("No ModuleEntryTable for the boot class loader"); 1847 } 1848 1849 { 1850 MutexLocker ml(Module_lock, THREAD); 1851 ModuleEntry* jb_module = null_cld_modules->locked_create_entry_or_null(Handle(), 1852 false, vmSymbols::java_base(), NULL, NULL, null_cld); 1853 if (jb_module == NULL) { 1854 vm_exit_during_initialization("Unable to create ModuleEntry for " JAVA_BASE_NAME); 1855 } 1856 ModuleEntryTable::set_javabase_moduleEntry(jb_module); 1857 } 1858 } 1859 1860 #ifndef PRODUCT 1861 1862 // CompileTheWorld 1863 // 1864 // Iterates over all class path entries and forces compilation of all methods 1865 // in all classes found. Currently, only zip/jar archives are searched. 1866 // 1867 // The classes are loaded by the Java level bootstrap class loader, and the 1868 // initializer is called. If DelayCompilationDuringStartup is true (default), 1869 // the interpreter will run the initialization code. Note that forcing 1870 // initialization in this way could potentially lead to initialization order 1871 // problems, in which case we could just force the initialization bit to be set. 1872 1873 1874 // We need to iterate over the contents of a zip/jar file, so we replicate the 1875 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile, 1876 // since jzfile already has a void* definition. 1877 // 1878 // Note that this is only used in debug mode. 1879 // 1880 // HotSpot integration note: 1881 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build 1882 1883 1884 // JDK 1.3 version 1885 typedef struct real_jzentry { /* Zip file entry */ 1886 char *name; /* entry name */ 1887 jint time; /* modification time */ 1888 jint size; /* size of uncompressed data */ 1889 jint csize; /* size of compressed data (zero if uncompressed) */ 1890 jint crc; /* crc of uncompressed data */ 1891 char *comment; /* optional zip file comment */ 1892 jbyte *extra; /* optional extra data */ 1893 jint pos; /* position of LOC header (if negative) or data */ 1894 } real_jzentry; 1895 1896 typedef struct real_jzfile { /* Zip file */ 1897 char *name; /* zip file name */ 1898 jint refs; /* number of active references */ 1899 jint fd; /* open file descriptor */ 1900 void *lock; /* read lock */ 1901 char *comment; /* zip file comment */ 1902 char *msg; /* zip error message */ 1903 void *entries; /* array of hash cells */ 1904 jint total; /* total number of entries */ 1905 unsigned short *table; /* Hash chain heads: indexes into entries */ 1906 jint tablelen; /* number of hash eads */ 1907 real_jzfile *next; /* next zip file in search list */ 1908 jzentry *cache; /* we cache the most recently freed jzentry */ 1909 /* Information on metadata names in META-INF directory */ 1910 char **metanames; /* array of meta names (may have null names) */ 1911 jint metacount; /* number of slots in metanames array */ 1912 /* If there are any per-entry comments, they are in the comments array */ 1913 char **comments; 1914 } real_jzfile; 1915 1916 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) { 1917 // For now we only compile all methods in all classes in zip/jar files 1918 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir); 1919 tty->cr(); 1920 } 1921 1922 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) { 1923 real_jzfile* zip = (real_jzfile*) _zip; 1924 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); 1925 tty->cr(); 1926 // Iterate over all entries in zip file 1927 for (int n = 0; ; n++) { 1928 real_jzentry * ze = (real_jzentry *)((*GetNextEntry)(_zip, n)); 1929 if (ze == NULL) break; 1930 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); 1931 } 1932 if (HAS_PENDING_EXCEPTION) { 1933 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1934 CLEAR_PENDING_EXCEPTION; 1935 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); 1936 tty->print_cr("Increase class metadata storage if a limit was set"); 1937 } else { 1938 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); 1939 } 1940 } 1941 } 1942 1943 void ClassLoader::compile_the_world() { 1944 EXCEPTION_MARK; 1945 HandleMark hm(THREAD); 1946 ResourceMark rm(THREAD); 1947 1948 assert(has_jrt_entry(), "Compile The World not supported with exploded module build"); 1949 1950 // Find bootstrap loader 1951 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader()); 1952 jlong start = os::javaTimeMillis(); 1953 1954 // Compile the world for the modular java runtime image 1955 _jrt_entry->compile_the_world(system_class_loader, CATCH); 1956 1957 // Iterate over all bootstrap class path appended entries 1958 ClassPathEntry* e = _first_append_entry; 1959 while (e != NULL) { 1960 assert(!e->is_modules_image(), "A modular java runtime image is present on the list of appended entries"); 1961 e->compile_the_world(system_class_loader, CATCH); 1962 e = e->next(); 1963 } 1964 jlong end = os::javaTimeMillis(); 1965 tty->print_cr("CompileTheWorld : Done (%d classes, %d methods, " JLONG_FORMAT " ms)", 1966 _compile_the_world_class_counter, _compile_the_world_method_counter, (end - start)); 1967 { 1968 // Print statistics as if before normal exit: 1969 extern void print_statistics(); 1970 print_statistics(); 1971 } 1972 vm_exit(0); 1973 } 1974 1975 int ClassLoader::_compile_the_world_class_counter = 0; 1976 int ClassLoader::_compile_the_world_method_counter = 0; 1977 static int _codecache_sweep_counter = 0; 1978 1979 // Filter out all exceptions except OOMs 1980 static void clear_pending_exception_if_not_oom(TRAPS) { 1981 if (HAS_PENDING_EXCEPTION && 1982 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1983 CLEAR_PENDING_EXCEPTION; 1984 } 1985 // The CHECK at the caller will propagate the exception out 1986 } 1987 1988 /** 1989 * Returns if the given method should be compiled when doing compile-the-world. 1990 * 1991 * TODO: This should be a private method in a CompileTheWorld class. 1992 */ 1993 static bool can_be_compiled(const methodHandle& m, int comp_level) { 1994 assert(CompileTheWorld, "must be"); 1995 1996 // It's not valid to compile a native wrapper for MethodHandle methods 1997 // that take a MemberName appendix since the bytecode signature is not 1998 // correct. 1999 vmIntrinsics::ID iid = m->intrinsic_id(); 2000 if (MethodHandles::is_signature_polymorphic(iid) && MethodHandles::has_member_arg(iid)) { 2001 return false; 2002 } 2003 2004 return CompilationPolicy::can_be_compiled(m, comp_level); 2005 } 2006 2007 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) { 2008 if (string_ends_with(name, ".class")) { 2009 // We have a .class file 2010 int len = (int)strlen(name); 2011 char buffer[2048]; 2012 strncpy(buffer, name, len - 6); 2013 buffer[len-6] = 0; 2014 // If the file has a period after removing .class, it's not really a 2015 // valid class file. The class loader will check everything else. 2016 if (strchr(buffer, '.') == NULL) { 2017 _compile_the_world_class_counter++; 2018 if (_compile_the_world_class_counter > CompileTheWorldStopAt) return; 2019 2020 // Construct name without extension 2021 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK); 2022 // Use loader to load and initialize class 2023 Klass* k = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD); 2024 if (k != NULL && !HAS_PENDING_EXCEPTION) { 2025 k->initialize(THREAD); 2026 } 2027 bool exception_occurred = HAS_PENDING_EXCEPTION; 2028 clear_pending_exception_if_not_oom(CHECK); 2029 if (CompileTheWorldPreloadClasses && k != NULL) { 2030 InstanceKlass* ik = InstanceKlass::cast(k); 2031 ConstantPool::preload_and_initialize_all_classes(ik->constants(), THREAD); 2032 if (HAS_PENDING_EXCEPTION) { 2033 // If something went wrong in preloading we just ignore it 2034 clear_pending_exception_if_not_oom(CHECK); 2035 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_class_counter, buffer); 2036 } 2037 } 2038 2039 if (_compile_the_world_class_counter >= CompileTheWorldStartAt) { 2040 if (k == NULL || exception_occurred) { 2041 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class 2042 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_class_counter, buffer); 2043 } else { 2044 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_class_counter, buffer); 2045 // Preload all classes to get around uncommon traps 2046 // Iterate over all methods in class 2047 int comp_level = CompilationPolicy::policy()->initial_compile_level(); 2048 InstanceKlass* ik = InstanceKlass::cast(k); 2049 for (int n = 0; n < ik->methods()->length(); n++) { 2050 methodHandle m (THREAD, ik->methods()->at(n)); 2051 if (can_be_compiled(m, comp_level)) { 2052 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) { 2053 // Give sweeper a chance to keep up with CTW 2054 VM_CTWThreshold op; 2055 VMThread::execute(&op); 2056 _codecache_sweep_counter = 0; 2057 } 2058 // Force compilation 2059 CompileBroker::compile_method(m, InvocationEntryBci, comp_level, 2060 methodHandle(), 0, CompileTask::Reason_CTW, THREAD); 2061 if (HAS_PENDING_EXCEPTION) { 2062 clear_pending_exception_if_not_oom(CHECK); 2063 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 2064 } else { 2065 _compile_the_world_method_counter++; 2066 } 2067 if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) { 2068 // Clobber the first compile and force second tier compilation 2069 CompiledMethod* nm = m->code(); 2070 if (nm != NULL && !m->is_method_handle_intrinsic()) { 2071 // Throw out the code so that the code cache doesn't fill up 2072 nm->make_not_entrant(); 2073 } 2074 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization, 2075 methodHandle(), 0, CompileTask::Reason_CTW, THREAD); 2076 if (HAS_PENDING_EXCEPTION) { 2077 clear_pending_exception_if_not_oom(CHECK); 2078 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 2079 } else { 2080 _compile_the_world_method_counter++; 2081 } 2082 } 2083 } else { 2084 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 2085 } 2086 2087 CompiledMethod* nm = m->code(); 2088 if (nm != NULL && !m->is_method_handle_intrinsic()) { 2089 // Throw out the code so that the code cache doesn't fill up 2090 nm->make_not_entrant(); 2091 } 2092 } 2093 } 2094 } 2095 } 2096 } 2097 } 2098 2099 #endif //PRODUCT 2100 2101 // Please keep following two functions at end of this file. With them placed at top or in middle of the file, 2102 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589. 2103 void PerfClassTraceTime::initialize() { 2104 if (!UsePerfData) return; 2105 2106 if (_eventp != NULL) { 2107 // increment the event counter 2108 _eventp->inc(); 2109 } 2110 2111 // stop the current active thread-local timer to measure inclusive time 2112 _prev_active_event = -1; 2113 for (int i=0; i < EVENT_TYPE_COUNT; i++) { 2114 if (_timers[i].is_active()) { 2115 assert(_prev_active_event == -1, "should have only one active timer"); 2116 _prev_active_event = i; 2117 _timers[i].stop(); 2118 } 2119 } 2120 2121 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) { 2122 // start the inclusive timer if not recursively called 2123 _t.start(); 2124 } 2125 2126 // start thread-local timer of the given event type 2127 if (!_timers[_event_type].is_active()) { 2128 _timers[_event_type].start(); 2129 } 2130 } 2131 2132 PerfClassTraceTime::~PerfClassTraceTime() { 2133 if (!UsePerfData) return; 2134 2135 // stop the thread-local timer as the event completes 2136 // and resume the thread-local timer of the event next on the stack 2137 _timers[_event_type].stop(); 2138 jlong selftime = _timers[_event_type].ticks(); 2139 2140 if (_prev_active_event >= 0) { 2141 _timers[_prev_active_event].start(); 2142 } 2143 2144 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return; 2145 2146 // increment the counters only on the leaf call 2147 _t.stop(); 2148 _timep->inc(_t.ticks()); 2149 if (_selftimep != NULL) { 2150 _selftimep->inc(selftime); 2151 } 2152 // add all class loading related event selftime to the accumulated time counter 2153 ClassLoader::perf_accumulated_time()->inc(selftime); 2154 2155 // reset the timer 2156 _timers[_event_type].reset(); 2157 }