1 /* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/classFileStream.hpp" 27 #include "classfile/classLoader.hpp" 28 #include "classfile/classLoaderData.inline.hpp" 29 #include "classfile/classLoaderExt.hpp" 30 #include "classfile/javaClasses.hpp" 31 #include "classfile/jimage.hpp" 32 #include "classfile/moduleEntry.hpp" 33 #include "classfile/modules.hpp" 34 #include "classfile/packageEntry.hpp" 35 #include "classfile/klassFactory.hpp" 36 #include "classfile/systemDictionary.hpp" 37 #include "classfile/vmSymbols.hpp" 38 #include "compiler/compileBroker.hpp" 39 #include "gc/shared/collectedHeap.inline.hpp" 40 #include "gc/shared/generation.hpp" 41 #include "interpreter/bytecodeStream.hpp" 42 #include "interpreter/oopMapCache.hpp" 43 #include "logging/logTag.hpp" 44 #include "memory/allocation.inline.hpp" 45 #include "memory/filemap.hpp" 46 #include "memory/oopFactory.hpp" 47 #include "memory/resourceArea.hpp" 48 #include "memory/universe.inline.hpp" 49 #include "oops/instanceKlass.hpp" 50 #include "oops/instanceRefKlass.hpp" 51 #include "oops/objArrayOop.inline.hpp" 52 #include "oops/oop.inline.hpp" 53 #include "oops/symbol.hpp" 54 #include "prims/jvm_misc.hpp" 55 #include "runtime/arguments.hpp" 56 #include "runtime/compilationPolicy.hpp" 57 #include "runtime/fprofiler.hpp" 58 #include "runtime/handles.hpp" 59 #include "runtime/handles.inline.hpp" 60 #include "runtime/init.hpp" 61 #include "runtime/interfaceSupport.hpp" 62 #include "runtime/java.hpp" 63 #include "runtime/javaCalls.hpp" 64 #include "runtime/os.hpp" 65 #include "runtime/threadCritical.hpp" 66 #include "runtime/timer.hpp" 67 #include "runtime/vm_version.hpp" 68 #include "services/management.hpp" 69 #include "services/threadService.hpp" 70 #include "utilities/events.hpp" 71 #include "utilities/hashtable.inline.hpp" 72 #include "utilities/macros.hpp" 73 #if INCLUDE_CDS 74 #include "classfile/sharedClassUtil.hpp" 75 #include "classfile/sharedPathsMiscInfo.hpp" 76 #endif 77 78 // Entry points in zip.dll for loading zip/jar file entries 79 80 typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg); 81 typedef void (JNICALL *ZipClose_t)(jzfile *zip); 82 typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen); 83 typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf); 84 typedef jboolean (JNICALL *ReadMappedEntry_t)(jzfile *zip, jzentry *entry, unsigned char **buf, char *namebuf); 85 typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n); 86 typedef jboolean (JNICALL *ZipInflateFully_t)(void *inBuf, jlong inLen, void *outBuf, jlong outLen, char **pmsg); 87 typedef jint (JNICALL *Crc32_t)(jint crc, const jbyte *buf, jint len); 88 89 static ZipOpen_t ZipOpen = NULL; 90 static ZipClose_t ZipClose = NULL; 91 static FindEntry_t FindEntry = NULL; 92 static ReadEntry_t ReadEntry = NULL; 93 static ReadMappedEntry_t ReadMappedEntry = NULL; 94 static GetNextEntry_t GetNextEntry = NULL; 95 static canonicalize_fn_t CanonicalizeEntry = NULL; 96 static ZipInflateFully_t ZipInflateFully = NULL; 97 static Crc32_t Crc32 = NULL; 98 99 // Entry points for jimage.dll for loading jimage file entries 100 101 static JImageOpen_t JImageOpen = NULL; 102 static JImageClose_t JImageClose = NULL; 103 static JImagePackageToModule_t JImagePackageToModule = NULL; 104 static JImageFindResource_t JImageFindResource = NULL; 105 static JImageGetResource_t JImageGetResource = NULL; 106 static JImageResourceIterator_t JImageResourceIterator = NULL; 107 108 // Globals 109 110 PerfCounter* ClassLoader::_perf_accumulated_time = NULL; 111 PerfCounter* ClassLoader::_perf_classes_inited = NULL; 112 PerfCounter* ClassLoader::_perf_class_init_time = NULL; 113 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL; 114 PerfCounter* ClassLoader::_perf_classes_verified = NULL; 115 PerfCounter* ClassLoader::_perf_class_verify_time = NULL; 116 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL; 117 PerfCounter* ClassLoader::_perf_classes_linked = NULL; 118 PerfCounter* ClassLoader::_perf_class_link_time = NULL; 119 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL; 120 PerfCounter* ClassLoader::_perf_class_parse_time = NULL; 121 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL; 122 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL; 123 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL; 124 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL; 125 PerfCounter* ClassLoader::_perf_app_classload_time = NULL; 126 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL; 127 PerfCounter* ClassLoader::_perf_app_classload_count = NULL; 128 PerfCounter* ClassLoader::_perf_define_appclasses = NULL; 129 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL; 130 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL; 131 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL; 132 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL; 133 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL; 134 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL; 135 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL; 136 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL; 137 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL; 138 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL; 139 PerfCounter* ClassLoader::_isUnsyncloadClass = NULL; 140 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL; 141 142 ClassPathEntry* ClassLoader::_first_entry = NULL; 143 ClassPathEntry* ClassLoader::_last_entry = NULL; 144 int ClassLoader::_num_entries = 0; 145 ClassPathEntry* ClassLoader::_first_append_entry = NULL; 146 bool ClassLoader::_has_jimage = false; 147 #if INCLUDE_CDS 148 GrowableArray<char*>* ClassLoader::_boot_modules_array = NULL; 149 GrowableArray<char*>* ClassLoader::_platform_modules_array = NULL; 150 SharedPathsMiscInfo* ClassLoader::_shared_paths_misc_info = NULL; 151 #endif 152 153 // helper routines 154 bool string_starts_with(const char* str, const char* str_to_find) { 155 size_t str_len = strlen(str); 156 size_t str_to_find_len = strlen(str_to_find); 157 if (str_to_find_len > str_len) { 158 return false; 159 } 160 return (strncmp(str, str_to_find, str_to_find_len) == 0); 161 } 162 163 static const char* get_jimage_version_string() { 164 static char version_string[10] = ""; 165 if (version_string[0] == '\0') { 166 jio_snprintf(version_string, sizeof(version_string), "%d.%d", 167 Abstract_VM_Version::vm_major_version(), Abstract_VM_Version::vm_minor_version()); 168 } 169 return (const char*)version_string; 170 } 171 172 bool ClassLoader::string_ends_with(const char* str, const char* str_to_find) { 173 size_t str_len = strlen(str); 174 size_t str_to_find_len = strlen(str_to_find); 175 if (str_to_find_len > str_len) { 176 return false; 177 } 178 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0); 179 } 180 181 182 ClassPathDirEntry::ClassPathDirEntry(const char* dir) : ClassPathEntry() { 183 char* copy = NEW_C_HEAP_ARRAY(char, strlen(dir)+1, mtClass); 184 strcpy(copy, dir); 185 _dir = copy; 186 } 187 188 189 ClassFileStream* ClassPathDirEntry::open_stream(const char* name, TRAPS) { 190 // construct full path name 191 char path[JVM_MAXPATHLEN]; 192 if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) { 193 return NULL; 194 } 195 // check if file exists 196 struct stat st; 197 if (os::stat(path, &st) == 0) { 198 #if INCLUDE_CDS 199 if (DumpSharedSpaces) { 200 // We have already check in ClassLoader::check_shared_classpath() that the directory is empty, so 201 // we should never find a file underneath it -- unless user has added a new file while we are running 202 // the dump, in which case let's quit! 203 ShouldNotReachHere(); 204 } 205 #endif 206 // found file, open it 207 int file_handle = os::open(path, 0, 0); 208 if (file_handle != -1) { 209 // read contents into resource array 210 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size); 211 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size); 212 // close file 213 os::close(file_handle); 214 // construct ClassFileStream 215 if (num_read == (size_t)st.st_size) { 216 if (UsePerfData) { 217 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read); 218 } 219 // Resource allocated 220 return new ClassFileStream(buffer, 221 st.st_size, 222 _dir, 223 ClassFileStream::verify); 224 } 225 } 226 } 227 return NULL; 228 } 229 230 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name, bool is_boot_append) : ClassPathEntry() { 231 _zip = zip; 232 char *copy = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1, mtClass); 233 strcpy(copy, zip_name); 234 _zip_name = copy; 235 _is_boot_append = is_boot_append; 236 } 237 238 ClassPathZipEntry::~ClassPathZipEntry() { 239 if (ZipClose != NULL) { 240 (*ZipClose)(_zip); 241 } 242 FREE_C_HEAP_ARRAY(char, _zip_name); 243 } 244 245 u1* ClassPathZipEntry::open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS) { 246 // enable call to C land 247 JavaThread* thread = JavaThread::current(); 248 ThreadToNativeFromVM ttn(thread); 249 // check whether zip archive contains name 250 jint name_len; 251 jzentry* entry = (*FindEntry)(_zip, name, filesize, &name_len); 252 if (entry == NULL) return NULL; 253 u1* buffer; 254 char name_buf[128]; 255 char* filename; 256 if (name_len < 128) { 257 filename = name_buf; 258 } else { 259 filename = NEW_RESOURCE_ARRAY(char, name_len + 1); 260 } 261 262 // file found, get pointer to the entry in mmapped jar file. 263 if (ReadMappedEntry == NULL || 264 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) { 265 // mmapped access not available, perhaps due to compression, 266 // read contents into resource array 267 int size = (*filesize) + ((nul_terminate) ? 1 : 0); 268 buffer = NEW_RESOURCE_ARRAY(u1, size); 269 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL; 270 } 271 272 // return result 273 if (nul_terminate) { 274 buffer[*filesize] = 0; 275 } 276 return buffer; 277 } 278 279 #if INCLUDE_CDS 280 u1* ClassPathZipEntry::open_versioned_entry(const char* name, jint* filesize, TRAPS) { 281 u1* buffer = NULL; 282 if (!_is_boot_append) { 283 assert(DumpSharedSpaces, "Should be called only for non-boot entries during dump time"); 284 // We presume default is multi-release enabled 285 const char* multi_ver = Arguments::get_property("jdk.util.jar.enableMultiRelease"); 286 const char* verstr = Arguments::get_property("jdk.util.jar.version"); 287 bool is_multi_ver = (multi_ver == NULL || 288 strcmp(multi_ver, "true") == 0 || 289 strcmp(multi_ver, "force") == 0) && 290 is_multiple_versioned(THREAD); 291 // command line version setting 292 int version = 0; 293 const int base_version = 8; // JDK8 294 int cur_ver = JDK_Version::current().major_version(); 295 if (verstr != NULL) { 296 version = atoi(verstr); 297 if (version < base_version || version > cur_ver) { 298 is_multi_ver = false; 299 // print out warning, do not use assertion here since it will continue to look 300 // for proper version. 301 warning("JDK%d is not supported in multiple version jars", version); 302 } 303 } 304 305 if (is_multi_ver) { 306 int n; 307 char entry_name[JVM_MAXPATHLEN]; 308 if (version > 0) { 309 n = jio_snprintf(entry_name, sizeof(entry_name), "META-INF/versions/%d/%s", version, name); 310 entry_name[n] = '\0'; 311 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL); 312 if (buffer == NULL) { 313 warning("Could not find %s in %s, try to find highest version instead", entry_name, _zip_name); 314 } 315 } 316 if (buffer == NULL) { 317 for (int i = cur_ver; i >= base_version; i--) { 318 n = jio_snprintf(entry_name, sizeof(entry_name), "META-INF/versions/%d/%s", i, name); 319 entry_name[n] = '\0'; 320 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL); 321 if (buffer != NULL) { 322 break; 323 } 324 } 325 } 326 } 327 } 328 return buffer; 329 } 330 331 bool ClassPathZipEntry::is_multiple_versioned(TRAPS) { 332 assert(DumpSharedSpaces, "called only at dump time"); 333 jint size; 334 char* buffer = (char*)open_entry("META-INF/MANIFEST.MF", &size, false, CHECK_false); 335 if (buffer != NULL) { 336 if (strstr(buffer, "Multi-Release: true") != NULL) { 337 return true; 338 } 339 } 340 return false; 341 } 342 #endif // INCLUDE_CDS 343 344 ClassFileStream* ClassPathZipEntry::open_stream(const char* name, TRAPS) { 345 jint filesize; 346 u1* buffer = open_versioned_entry(name, &filesize, CHECK_NULL); 347 if (buffer == NULL) { 348 buffer = open_entry(name, &filesize, false, CHECK_NULL); 349 if (buffer == NULL) { 350 return NULL; 351 } 352 } 353 if (UsePerfData) { 354 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize); 355 } 356 // Resource allocated 357 return new ClassFileStream(buffer, 358 filesize, 359 _zip_name, 360 ClassFileStream::verify); 361 } 362 363 // invoke function for each entry in the zip file 364 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) { 365 JavaThread* thread = JavaThread::current(); 366 HandleMark handle_mark(thread); 367 ThreadToNativeFromVM ttn(thread); 368 for (int n = 0; ; n++) { 369 jzentry * ze = ((*GetNextEntry)(_zip, n)); 370 if (ze == NULL) break; 371 (*f)(ze->name, context); 372 } 373 } 374 375 ClassPathImageEntry::ClassPathImageEntry(JImageFile* jimage, const char* name) : 376 ClassPathEntry(), 377 _jimage(jimage) { 378 guarantee(jimage != NULL, "jimage file is null"); 379 guarantee(name != NULL, "jimage file name is null"); 380 size_t len = strlen(name) + 1; 381 _name = NEW_C_HEAP_ARRAY(const char, len, mtClass); 382 strncpy((char *)_name, name, len); 383 } 384 385 ClassPathImageEntry::~ClassPathImageEntry() { 386 if (_name != NULL) { 387 FREE_C_HEAP_ARRAY(const char, _name); 388 _name = NULL; 389 } 390 if (_jimage != NULL) { 391 (*JImageClose)(_jimage); 392 _jimage = NULL; 393 } 394 } 395 396 void ClassPathImageEntry::name_to_package(const char* name, char* buffer, int length) { 397 const char *pslash = strrchr(name, '/'); 398 if (pslash == NULL) { 399 buffer[0] = '\0'; 400 return; 401 } 402 int len = pslash - name; 403 #if INCLUDE_CDS 404 if (len <= 0 && DumpSharedSpaces) { 405 buffer[0] = '\0'; 406 return; 407 } 408 #endif 409 assert(len > 0, "Bad length for package name"); 410 if (len >= length) { 411 buffer[0] = '\0'; 412 return; 413 } 414 // drop name after last slash (including slash) 415 // Ex., "java/lang/String.class" => "java/lang" 416 strncpy(buffer, name, len); 417 // ensure string termination (strncpy does not guarantee) 418 buffer[len] = '\0'; 419 } 420 421 // For a class in a named module, look it up in the jimage file using this syntax: 422 // /<module-name>/<package-name>/<base-class> 423 // 424 // Assumptions: 425 // 1. There are no unnamed modules in the jimage file. 426 // 2. A package is in at most one module in the jimage file. 427 // 428 ClassFileStream* ClassPathImageEntry::open_stream(const char* name, TRAPS) { 429 jlong size; 430 JImageLocationRef location = (*JImageFindResource)(_jimage, "", get_jimage_version_string(), name, &size); 431 432 if (location == 0) { 433 char package[JIMAGE_MAX_PATH]; 434 name_to_package(name, package, JIMAGE_MAX_PATH); 435 436 #if INCLUDE_CDS 437 if (package[0] == '\0' && DumpSharedSpaces) { 438 return NULL; 439 } 440 #endif 441 if (package[0] != '\0') { 442 if (!Universe::is_module_initialized()) { 443 location = (*JImageFindResource)(_jimage, "java.base", get_jimage_version_string(), name, &size); 444 #if INCLUDE_CDS 445 // CDS uses the boot class loader to load classes whose packages are in 446 // modules defined for other class loaders. So, for now, get their module 447 // names from the "modules" jimage file. 448 if (DumpSharedSpaces && location == 0) { 449 const char* module_name = (*JImagePackageToModule)(_jimage, package); 450 if (module_name != NULL) { 451 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size); 452 } 453 } 454 #endif 455 456 } else { 457 // Get boot class loader's package entry table 458 PackageEntryTable* pkgEntryTable = 459 ClassLoaderData::the_null_class_loader_data()->packages(); 460 // Get package's package entry 461 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(package, CHECK_NULL); 462 PackageEntry* package_entry = pkgEntryTable->lookup_only(pkg_symbol); 463 464 if (package_entry != NULL) { 465 ResourceMark rm; 466 // Get the module name 467 ModuleEntry* module = package_entry->module(); 468 assert(module != NULL, "Boot classLoader package missing module"); 469 assert(module->is_named(), "Boot classLoader package is in unnamed module"); 470 const char* module_name = module->name()->as_C_string(); 471 if (module_name != NULL) { 472 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size); 473 } 474 } 475 } 476 } 477 } 478 if (location != 0) { 479 if (UsePerfData) { 480 ClassLoader::perf_sys_classfile_bytes_read()->inc(size); 481 } 482 char* data = NEW_RESOURCE_ARRAY(char, size); 483 (*JImageGetResource)(_jimage, location, data, size); 484 // Resource allocated 485 return new ClassFileStream((u1*)data, 486 (int)size, 487 _name, 488 ClassFileStream::verify); 489 } 490 491 return NULL; 492 } 493 494 #ifndef PRODUCT 495 bool ctw_visitor(JImageFile* jimage, 496 const char* module_name, const char* version, const char* package, 497 const char* name, const char* extension, void* arg) { 498 if (strcmp(extension, "class") == 0) { 499 Thread* THREAD = Thread::current(); 500 char path[JIMAGE_MAX_PATH]; 501 jio_snprintf(path, JIMAGE_MAX_PATH - 1, "%s/%s.class", package, name); 502 ClassLoader::compile_the_world_in(path, *(Handle*)arg, THREAD); 503 return !HAS_PENDING_EXCEPTION; 504 } 505 return true; 506 } 507 508 void ClassPathImageEntry::compile_the_world(Handle loader, TRAPS) { 509 tty->print_cr("CompileTheWorld : Compiling all classes in %s", name()); 510 tty->cr(); 511 (*JImageResourceIterator)(_jimage, (JImageResourceVisitor_t)ctw_visitor, (void *)&loader); 512 if (HAS_PENDING_EXCEPTION) { 513 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 514 CLEAR_PENDING_EXCEPTION; 515 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); 516 tty->print_cr("Increase class metadata storage if a limit was set"); 517 } else { 518 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); 519 } 520 } 521 } 522 #endif 523 524 bool ClassPathImageEntry::is_jrt() { 525 return ClassLoader::is_jrt(name()); 526 } 527 528 #if INCLUDE_CDS 529 void ClassLoader::exit_with_path_failure(const char* error, const char* message) { 530 assert(DumpSharedSpaces, "only called at dump time"); 531 tty->print_cr("Hint: enable -Xlog:classpath=info to diagnose the failure"); 532 vm_exit_during_initialization(error, message); 533 } 534 #endif 535 536 void ClassLoader::trace_class_path(const char* msg, const char* name) { 537 if (log_is_enabled(Info, classpath)) { 538 ResourceMark rm; 539 outputStream* out = Log(classpath)::info_stream(); 540 if (msg) { 541 out->print("%s", msg); 542 } 543 if (name) { 544 if (strlen(name) < 256) { 545 out->print("%s", name); 546 } else { 547 // For very long paths, we need to print each character separately, 548 // as print_cr() has a length limit 549 while (name[0] != '\0') { 550 out->print("%c", name[0]); 551 name++; 552 } 553 } 554 } 555 out->cr(); 556 } 557 } 558 559 #if INCLUDE_CDS 560 void ClassLoader::check_shared_classpath(const char *path) { 561 if (strcmp(path, "") == 0) { 562 exit_with_path_failure("Cannot have empty path in archived classpaths", NULL); 563 } 564 565 struct stat st; 566 if (os::stat(path, &st) == 0) { 567 if ((st.st_mode & S_IFREG) != S_IFREG) { // is directory 568 if (!os::dir_is_empty(path)) { 569 tty->print_cr("Error: non-empty directory '%s'", path); 570 exit_with_path_failure("CDS allows only empty directories in archived classpaths", NULL); 571 } 572 } 573 } 574 } 575 #endif 576 577 void ClassLoader::setup_bootstrap_search_path() { 578 assert(_first_entry == NULL, "should not setup bootstrap class search path twice"); 579 const char* sys_class_path = Arguments::get_sysclasspath(); 580 const char* java_class_path = Arguments::get_appclasspath(); 581 if (PrintSharedArchiveAndExit) { 582 // Don't print sys_class_path - this is the bootcp of this current VM process, not necessarily 583 // the same as the bootcp of the shared archive. 584 } else { 585 trace_class_path("bootstrap loader class path=", sys_class_path); 586 trace_class_path("classpath: ", java_class_path); 587 } 588 #if INCLUDE_CDS 589 if (DumpSharedSpaces) { 590 _shared_paths_misc_info->add_boot_classpath(sys_class_path); 591 } 592 #endif 593 setup_search_path(sys_class_path, true); 594 } 595 596 #if INCLUDE_CDS 597 int ClassLoader::get_shared_paths_misc_info_size() { 598 return _shared_paths_misc_info->get_used_bytes(); 599 } 600 601 void* ClassLoader::get_shared_paths_misc_info() { 602 return _shared_paths_misc_info->buffer(); 603 } 604 605 bool ClassLoader::check_shared_paths_misc_info(void *buf, int size) { 606 SharedPathsMiscInfo* checker = SharedClassUtil::allocate_shared_paths_misc_info((char*)buf, size); 607 bool result = checker->check(); 608 delete checker; 609 return result; 610 } 611 #endif 612 613 void ClassLoader::setup_search_path(const char *class_path, bool bootstrap_search) { 614 int offset = 0; 615 int len = (int)strlen(class_path); 616 int end = 0; 617 bool mark_append_entry = false; 618 619 // Iterate over class path entries 620 for (int start = 0; start < len; start = end) { 621 while (class_path[end] && class_path[end] != os::path_separator()[0]) { 622 end++; 623 } 624 EXCEPTION_MARK; 625 ResourceMark rm(THREAD); 626 mark_append_entry = (mark_append_entry || 627 (bootstrap_search && (start == Arguments::bootclassloader_append_index()))); 628 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1); 629 strncpy(path, &class_path[start], end - start); 630 path[end - start] = '\0'; 631 update_class_path_entry_list(path, false, mark_append_entry, false, bootstrap_search); 632 633 // Check on the state of the boot loader's append path 634 if (mark_append_entry && (_first_append_entry == NULL)) { 635 // Failure to mark the first append entry, most likely 636 // due to a non-existent path. Record the next entry 637 // as the first boot loader append entry. 638 mark_append_entry = true; 639 } else { 640 mark_append_entry = false; 641 } 642 643 #if INCLUDE_CDS 644 if (DumpSharedSpaces) { 645 check_shared_classpath(path); 646 } 647 #endif 648 while (class_path[end] == os::path_separator()[0]) { 649 end++; 650 } 651 } 652 } 653 654 ClassPathEntry* ClassLoader::create_class_path_entry(const char *path, const struct stat* st, 655 bool throw_exception, 656 bool is_boot_append, TRAPS) { 657 JavaThread* thread = JavaThread::current(); 658 ClassPathEntry* new_entry = NULL; 659 if ((st->st_mode & S_IFREG) == S_IFREG) { 660 // Regular file, should be a zip or jimage file 661 // Canonicalized filename 662 char canonical_path[JVM_MAXPATHLEN]; 663 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 664 // This matches the classic VM 665 if (throw_exception) { 666 THROW_MSG_(vmSymbols::java_io_IOException(), "Bad pathname", NULL); 667 } else { 668 return NULL; 669 } 670 } 671 jint error; 672 JImageFile* jimage =(*JImageOpen)(canonical_path, &error); 673 if (jimage != NULL) { 674 new_entry = new ClassPathImageEntry(jimage, canonical_path); 675 } else { 676 char* error_msg = NULL; 677 jzfile* zip; 678 { 679 // enable call to C land 680 ThreadToNativeFromVM ttn(thread); 681 HandleMark hm(thread); 682 zip = (*ZipOpen)(canonical_path, &error_msg); 683 } 684 if (zip != NULL && error_msg == NULL) { 685 new_entry = new ClassPathZipEntry(zip, path, is_boot_append); 686 } else { 687 ResourceMark rm(thread); 688 char *msg; 689 if (error_msg == NULL) { 690 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ; 691 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path); 692 } else { 693 int len = (int)(strlen(path) + strlen(error_msg) + 128); 694 msg = NEW_RESOURCE_ARRAY(char, len); ; 695 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path); 696 } 697 // Don't complain about bad jar files added via -Xbootclasspath/a:. 698 if (throw_exception && is_init_completed()) { 699 THROW_MSG_(vmSymbols::java_lang_ClassNotFoundException(), msg, NULL); 700 } else { 701 return NULL; 702 } 703 } 704 } 705 log_info(classpath)("opened: %s", path); 706 log_info(classload)("opened: %s", path); 707 } else { 708 // Directory 709 new_entry = new ClassPathDirEntry(path); 710 log_info(classload)("path: %s", path); 711 } 712 return new_entry; 713 } 714 715 716 // Create a class path zip entry for a given path (return NULL if not found 717 // or zip/JAR file cannot be opened) 718 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path, bool is_boot_append) { 719 // check for a regular file 720 struct stat st; 721 if (os::stat(path, &st) == 0) { 722 if ((st.st_mode & S_IFREG) == S_IFREG) { 723 char canonical_path[JVM_MAXPATHLEN]; 724 if (get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 725 char* error_msg = NULL; 726 jzfile* zip; 727 { 728 // enable call to C land 729 JavaThread* thread = JavaThread::current(); 730 ThreadToNativeFromVM ttn(thread); 731 HandleMark hm(thread); 732 zip = (*ZipOpen)(canonical_path, &error_msg); 733 } 734 if (zip != NULL && error_msg == NULL) { 735 // create using canonical path 736 return new ClassPathZipEntry(zip, canonical_path, is_boot_append); 737 } 738 } 739 } 740 } 741 return NULL; 742 } 743 744 // The boot class loader must adhere to specfic visibility rules. 745 // Prior to loading a class in a named package, the package is checked 746 // to see if it is in a module defined to the boot loader. If the 747 // package is not in a module defined to the boot loader, the class 748 // must be loaded only in the boot loader's append path, which 749 // consists of [-Xbootclasspath/a]; [jvmti appended entries] 750 void ClassLoader::set_first_append_entry(ClassPathEntry *new_entry) { 751 if (_first_append_entry == NULL) { 752 _first_append_entry = new_entry; 753 } 754 } 755 756 // returns true if entry already on class path 757 bool ClassLoader::contains_entry(ClassPathEntry *entry) { 758 ClassPathEntry* e = _first_entry; 759 while (e != NULL) { 760 // assume zip entries have been canonicalized 761 if (strcmp(entry->name(), e->name()) == 0) { 762 return true; 763 } 764 e = e->next(); 765 } 766 return false; 767 } 768 769 void ClassLoader::add_to_list(ClassPathEntry *new_entry) { 770 if (new_entry != NULL) { 771 if (_last_entry == NULL) { 772 _first_entry = _last_entry = new_entry; 773 } else { 774 _last_entry->set_next(new_entry); 775 _last_entry = new_entry; 776 } 777 } 778 _num_entries ++; 779 } 780 781 void ClassLoader::prepend_to_list(ClassPathEntry *new_entry) { 782 if (new_entry != NULL) { 783 if (_last_entry == NULL) { 784 _first_entry = _last_entry = new_entry; 785 } else { 786 new_entry->set_next(_first_entry); 787 _first_entry = new_entry; 788 } 789 } 790 _num_entries ++; 791 } 792 793 void ClassLoader::add_to_list(const char *apath) { 794 update_class_path_entry_list((char*)apath, false, false, false, false); 795 } 796 797 void ClassLoader::prepend_to_list(const char *apath) { 798 update_class_path_entry_list((char*)apath, false, false, true, false); 799 } 800 801 // Returns true IFF the file/dir exists and the entry was successfully created. 802 bool ClassLoader::update_class_path_entry_list(const char *path, 803 bool check_for_duplicates, 804 bool mark_append_entry, 805 bool prepend_entry, 806 bool is_boot_append, 807 bool throw_exception) { 808 struct stat st; 809 if (os::stat(path, &st) == 0) { 810 // File or directory found 811 ClassPathEntry* new_entry = NULL; 812 Thread* THREAD = Thread::current(); 813 new_entry = create_class_path_entry(path, &st, throw_exception, is_boot_append, CHECK_(false)); 814 if (new_entry == NULL) { 815 return false; 816 } 817 818 // Ensure that the first boot loader append entry will always be set correctly. 819 assert((!mark_append_entry || 820 (mark_append_entry && (!check_for_duplicates || !contains_entry(new_entry)))), 821 "failed to mark boot loader's first append boundary"); 822 823 // Do not reorder the bootclasspath which would break get_system_package(). 824 // Add new entry to linked list 825 826 if (!check_for_duplicates || !contains_entry(new_entry)) { 827 ClassLoaderExt::add_class_path_entry(path, check_for_duplicates, new_entry, prepend_entry); 828 if (mark_append_entry) { 829 set_first_append_entry(new_entry); 830 } 831 } 832 return true; 833 } else { 834 #if INCLUDE_CDS 835 if (DumpSharedSpaces) { 836 _shared_paths_misc_info->add_nonexist_path(path); 837 } 838 #endif 839 return false; 840 } 841 } 842 843 void ClassLoader::print_bootclasspath() { 844 ClassPathEntry* e = _first_entry; 845 tty->print("[bootclasspath= "); 846 while (e != NULL) { 847 tty->print("%s ;", e->name()); 848 e = e->next(); 849 } 850 tty->print_cr("]"); 851 } 852 853 void ClassLoader::load_zip_library() { 854 assert(ZipOpen == NULL, "should not load zip library twice"); 855 // First make sure native library is loaded 856 os::native_java_library(); 857 // Load zip library 858 char path[JVM_MAXPATHLEN]; 859 char ebuf[1024]; 860 void* handle = NULL; 861 if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip")) { 862 handle = os::dll_load(path, ebuf, sizeof ebuf); 863 } 864 if (handle == NULL) { 865 vm_exit_during_initialization("Unable to load ZIP library", path); 866 } 867 // Lookup zip entry points 868 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open")); 869 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close")); 870 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry")); 871 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry")); 872 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, os::dll_lookup(handle, "ZIP_ReadMappedEntry")); 873 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry")); 874 ZipInflateFully = CAST_TO_FN_PTR(ZipInflateFully_t, os::dll_lookup(handle, "ZIP_InflateFully")); 875 Crc32 = CAST_TO_FN_PTR(Crc32_t, os::dll_lookup(handle, "ZIP_CRC32")); 876 877 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL 878 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || 879 GetNextEntry == NULL || Crc32 == NULL) { 880 vm_exit_during_initialization("Corrupted ZIP library", path); 881 } 882 883 if (ZipInflateFully == NULL) { 884 vm_exit_during_initialization("Corrupted ZIP library ZIP_InflateFully missing", path); 885 } 886 887 // Lookup canonicalize entry in libjava.dll 888 void *javalib_handle = os::native_java_library(); 889 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize")); 890 // This lookup only works on 1.3. Do not check for non-null here 891 } 892 893 void ClassLoader::load_jimage_library() { 894 // First make sure native library is loaded 895 os::native_java_library(); 896 // Load jimage library 897 char path[JVM_MAXPATHLEN]; 898 char ebuf[1024]; 899 void* handle = NULL; 900 if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "jimage")) { 901 handle = os::dll_load(path, ebuf, sizeof ebuf); 902 } 903 if (handle == NULL) { 904 vm_exit_during_initialization("Unable to load jimage library", path); 905 } 906 907 // Lookup jimage entry points 908 JImageOpen = CAST_TO_FN_PTR(JImageOpen_t, os::dll_lookup(handle, "JIMAGE_Open")); 909 guarantee(JImageOpen != NULL, "function JIMAGE_Open not found"); 910 JImageClose = CAST_TO_FN_PTR(JImageClose_t, os::dll_lookup(handle, "JIMAGE_Close")); 911 guarantee(JImageClose != NULL, "function JIMAGE_Close not found"); 912 JImagePackageToModule = CAST_TO_FN_PTR(JImagePackageToModule_t, os::dll_lookup(handle, "JIMAGE_PackageToModule")); 913 guarantee(JImagePackageToModule != NULL, "function JIMAGE_PackageToModule not found"); 914 JImageFindResource = CAST_TO_FN_PTR(JImageFindResource_t, os::dll_lookup(handle, "JIMAGE_FindResource")); 915 guarantee(JImageFindResource != NULL, "function JIMAGE_FindResource not found"); 916 JImageGetResource = CAST_TO_FN_PTR(JImageGetResource_t, os::dll_lookup(handle, "JIMAGE_GetResource")); 917 guarantee(JImageGetResource != NULL, "function JIMAGE_GetResource not found"); 918 JImageResourceIterator = CAST_TO_FN_PTR(JImageResourceIterator_t, os::dll_lookup(handle, "JIMAGE_ResourceIterator")); 919 guarantee(JImageResourceIterator != NULL, "function JIMAGE_ResourceIterator not found"); 920 } 921 922 jboolean ClassLoader::decompress(void *in, u8 inSize, void *out, u8 outSize, char **pmsg) { 923 return (*ZipInflateFully)(in, inSize, out, outSize, pmsg); 924 } 925 926 int ClassLoader::crc32(int crc, const char* buf, int len) { 927 assert(Crc32 != NULL, "ZIP_CRC32 is not found"); 928 return (*Crc32)(crc, (const jbyte*)buf, len); 929 } 930 931 #if INCLUDE_CDS 932 void ClassLoader::initialize_module_loader_map(JImageFile* jimage) { 933 jlong size; 934 JImageLocationRef location = (*JImageFindResource)(jimage, "java.base", get_jimage_version_string(), MODULE_LOADER_MAP, &size); 935 if (location == 0) { 936 vm_exit_during_initialization( 937 "Cannot find ModuleLoaderMap location from modules jimage.", NULL); 938 } 939 char* buffer = NEW_RESOURCE_ARRAY(char, size); 940 jlong read = (*JImageGetResource)(jimage, location, buffer, size); 941 if (read != size) { 942 vm_exit_during_initialization( 943 "Cannot find ModuleLoaderMap resource from modules jimage.", NULL); 944 } 945 char* char_buf = (char*)buffer; 946 int buflen = (int)strlen(char_buf); 947 char* begin_ptr = char_buf; 948 char* end_ptr = strchr(begin_ptr, '\n'); 949 bool process_boot_modules = false; 950 _boot_modules_array = new (ResourceObj::C_HEAP, mtInternal) 951 GrowableArray<char*>(INITIAL_BOOT_MODULES_ARRAY_SIZE, true); 952 _platform_modules_array = new (ResourceObj::C_HEAP, mtInternal) 953 GrowableArray<char*>(INITIAL_PLATFORM_MODULES_ARRAY_SIZE, true); 954 while (end_ptr != NULL && (end_ptr - char_buf) < buflen) { 955 // Allocate a buffer from the C heap to be appended to the _boot_modules_array 956 // or the _platform_modules_array. 957 char* temp_name = NEW_C_HEAP_ARRAY(char, (size_t)(end_ptr - begin_ptr + 1), mtInternal); 958 strncpy(temp_name, begin_ptr, end_ptr - begin_ptr); 959 temp_name[end_ptr - begin_ptr] = '\0'; 960 if (strncmp(temp_name, "BOOT", 4) == 0) { 961 process_boot_modules = true; 962 FREE_C_HEAP_ARRAY(char, temp_name); 963 } else if (strncmp(temp_name, "PLATFORM", 8) == 0) { 964 process_boot_modules = false; 965 FREE_C_HEAP_ARRAY(char, temp_name); 966 } else { 967 // module name 968 if (process_boot_modules) { 969 _boot_modules_array->append(temp_name); 970 } else { 971 _platform_modules_array->append(temp_name); 972 } 973 } 974 begin_ptr = ++end_ptr; 975 end_ptr = strchr(begin_ptr, '\n'); 976 } 977 FREE_RESOURCE_ARRAY(u1, buffer, size); 978 } 979 #endif 980 981 // Function add_package extracts the package from the fully qualified class name 982 // and checks if the package is in the boot loader's package entry table. If so, 983 // then it sets the classpath_index in the package entry record. 984 // 985 // The classpath_index field is used to find the entry on the boot loader class 986 // path for packages with classes loaded by the boot loader from -Xbootclasspath/a 987 // in an unnamed module. It is also used to indicate (for all packages whose 988 // classes are loaded by the boot loader) that at least one of the package's 989 // classes has been loaded. 990 bool ClassLoader::add_package(const char *fullq_class_name, s2 classpath_index, TRAPS) { 991 assert(fullq_class_name != NULL, "just checking"); 992 993 // Get package name from fully qualified class name. 994 const char *cp = strrchr(fullq_class_name, '/'); 995 if (cp != NULL) { 996 int len = cp - fullq_class_name; 997 PackageEntryTable* pkg_entry_tbl = 998 ClassLoaderData::the_null_class_loader_data()->packages(); 999 TempNewSymbol pkg_symbol = 1000 SymbolTable::new_symbol(fullq_class_name, len, CHECK_false); 1001 PackageEntry* pkg_entry = pkg_entry_tbl->lookup_only(pkg_symbol); 1002 if (pkg_entry != NULL) { 1003 assert(classpath_index != -1, "Unexpected classpath_index"); 1004 pkg_entry->set_classpath_index(classpath_index); 1005 } else { 1006 return false; 1007 } 1008 } 1009 return true; 1010 } 1011 1012 oop ClassLoader::get_system_package(const char* name, TRAPS) { 1013 // Look up the name in the boot loader's package entry table. 1014 if (name != NULL) { 1015 TempNewSymbol package_sym = SymbolTable::new_symbol(name, (int)strlen(name), CHECK_NULL); 1016 // Look for the package entry in the boot loader's package entry table. 1017 PackageEntry* package = 1018 ClassLoaderData::the_null_class_loader_data()->packages()->lookup_only(package_sym); 1019 1020 // Return NULL if package does not exist or if no classes in that package 1021 // have been loaded. 1022 if (package != NULL && package->has_loaded_class()) { 1023 ModuleEntry* module = package->module(); 1024 if (module->location() != NULL) { 1025 ResourceMark rm(THREAD); 1026 Handle ml = java_lang_String::create_from_str( 1027 module->location()->as_C_string(), THREAD); 1028 return ml(); 1029 } 1030 // Return entry on boot loader class path. 1031 Handle cph = java_lang_String::create_from_str( 1032 ClassLoader::classpath_entry(package->classpath_index())->name(), THREAD); 1033 return cph(); 1034 } 1035 } 1036 return NULL; 1037 } 1038 1039 objArrayOop ClassLoader::get_system_packages(TRAPS) { 1040 ResourceMark rm(THREAD); 1041 // List of pointers to PackageEntrys that have loaded classes. 1042 GrowableArray<PackageEntry*>* loaded_class_pkgs = new GrowableArray<PackageEntry*>(50); 1043 { 1044 MutexLocker ml(Module_lock, THREAD); 1045 1046 PackageEntryTable* pe_table = 1047 ClassLoaderData::the_null_class_loader_data()->packages(); 1048 1049 // Collect the packages that have at least one loaded class. 1050 for (int x = 0; x < pe_table->table_size(); x++) { 1051 for (PackageEntry* package_entry = pe_table->bucket(x); 1052 package_entry != NULL; 1053 package_entry = package_entry->next()) { 1054 if (package_entry->has_loaded_class()) { 1055 loaded_class_pkgs->append(package_entry); 1056 } 1057 } 1058 } 1059 } 1060 1061 1062 // Allocate objArray and fill with java.lang.String 1063 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 1064 loaded_class_pkgs->length(), CHECK_NULL); 1065 objArrayHandle result(THREAD, r); 1066 for (int x = 0; x < loaded_class_pkgs->length(); x++) { 1067 PackageEntry* package_entry = loaded_class_pkgs->at(x); 1068 Handle str = java_lang_String::create_from_symbol(package_entry->name(), CHECK_NULL); 1069 result->obj_at_put(x, str()); 1070 } 1071 return result(); 1072 } 1073 1074 #if INCLUDE_CDS 1075 s2 ClassLoader::module_to_classloader(const char* module_name) { 1076 1077 assert(_boot_modules_array != NULL, "_boot_modules_array is NULL"); 1078 assert(_platform_modules_array != NULL, "_platform_modules_array is NULL"); 1079 1080 int array_size = _boot_modules_array->length(); 1081 for (int i = 0; i < array_size; i++) { 1082 if (strcmp(module_name, _boot_modules_array->at(i)) == 0) { 1083 return BOOT_LOADER; 1084 } 1085 } 1086 1087 array_size = _platform_modules_array->length(); 1088 for (int i = 0; i < array_size; i++) { 1089 if (strcmp(module_name, _platform_modules_array->at(i)) == 0) { 1090 return PLATFORM_LOADER; 1091 } 1092 } 1093 1094 return APP_LOADER; 1095 } 1096 #endif 1097 1098 s2 ClassLoader::classloader_type(Symbol* class_name, ClassPathEntry* e, 1099 int classpath_index, TRAPS) { 1100 #if INCLUDE_CDS 1101 // obtain the classloader type based on the class name. 1102 // First obtain the package name based on the class name. Then obtain 1103 // the classloader type based on the package name from the jimage using 1104 // a jimage API. If the classloader type cannot be found from the 1105 // jimage, it is determined by the class path entry. 1106 jshort loader_type = ClassLoader::APP_LOADER; 1107 if (e->is_jrt()) { 1108 int length = 0; 1109 const jbyte* pkg_string = InstanceKlass::package_from_name(class_name, length); 1110 if (pkg_string != NULL) { 1111 ResourceMark rm; 1112 TempNewSymbol pkg_name = SymbolTable::new_symbol((const char*)pkg_string, length, THREAD); 1113 const char* pkg_name_C_string = (const char*)(pkg_name->as_C_string()); 1114 ClassPathImageEntry* cpie = (ClassPathImageEntry*)e; 1115 JImageFile* jimage = cpie->jimage(); 1116 char* module_name = (char*)(*JImagePackageToModule)(jimage, pkg_name_C_string); 1117 if (module_name != NULL) { 1118 loader_type = ClassLoader::module_to_classloader(module_name); 1119 } 1120 } 1121 } else if (ClassLoaderExt::is_boot_classpath(classpath_index)) { 1122 loader_type = ClassLoader::BOOT_LOADER; 1123 } 1124 return loader_type; 1125 #endif 1126 return ClassLoader::BOOT_LOADER; // the classloader type is ignored in non-CDS cases 1127 } 1128 1129 1130 // caller needs ResourceMark 1131 const char* ClassLoader::file_name_for_class_name(const char* class_name, 1132 int class_name_len) { 1133 assert(class_name != NULL, "invariant"); 1134 assert((int)strlen(class_name) == class_name_len, "invariant"); 1135 1136 static const char class_suffix[] = ".class"; 1137 1138 char* const file_name = NEW_RESOURCE_ARRAY(char, 1139 class_name_len + 1140 sizeof(class_suffix)); // includes term NULL 1141 1142 strncpy(file_name, class_name, class_name_len); 1143 strncpy(&file_name[class_name_len], class_suffix, sizeof(class_suffix)); 1144 1145 return file_name; 1146 } 1147 1148 instanceKlassHandle ClassLoader::load_class(Symbol* name, bool search_append_only, TRAPS) { 1149 1150 assert(name != NULL, "invariant"); 1151 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 1152 1153 ResourceMark rm; 1154 HandleMark hm; 1155 1156 const char* const class_name = name->as_C_string(); 1157 1158 EventMark m("loading class %s", class_name); 1159 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion); 1160 1161 const char* const file_name = file_name_for_class_name(class_name, 1162 name->utf8_length()); 1163 assert(file_name != NULL, "invariant"); 1164 1165 ClassLoaderExt::Context context(class_name, file_name, THREAD); 1166 1167 // Lookup stream for parsing .class file 1168 ClassFileStream* stream = NULL; 1169 s2 classpath_index = 0; 1170 1171 // If DumpSharedSpaces is true, boot loader visibility boundaries are set 1172 // to be _first_entry to the end (all path entries). 1173 // 1174 // If search_append_only is true, boot loader visibility boundaries are 1175 // set to be _fist_append_entry to the end. This includes: 1176 // [-Xbootclasspath/a]; [jvmti appended entries] 1177 // 1178 // If both DumpSharedSpaces and search_append_only are false, boot loader 1179 // visibility boundaries are set to be _first_entry to the entry before 1180 // the _first_append_entry. This would include: 1181 // [-Xpatch:<dirs>]; [exploded build | modules] 1182 // 1183 // DumpSharedSpaces and search_append_only are mutually exclusive and cannot 1184 // be true at the same time. 1185 ClassPathEntry* e = (search_append_only ? _first_append_entry : _first_entry); 1186 ClassPathEntry* last_e = 1187 (search_append_only || DumpSharedSpaces ? NULL : _first_append_entry); 1188 1189 { 1190 if (search_append_only) { 1191 // For the boot loader append path search, must calculate 1192 // the starting classpath_index prior to attempting to 1193 // load the classfile. 1194 ClassPathEntry *tmp_e = _first_entry; 1195 while ((tmp_e != NULL) && (tmp_e != _first_append_entry)) { 1196 tmp_e = tmp_e->next(); 1197 ++classpath_index; 1198 } 1199 } 1200 1201 // Attempt to load the classfile from either: 1202 // - [-Xpatch:dir]; exploded build | modules 1203 // or 1204 // - [-Xbootclasspath/a]; [jvmti appended entries] 1205 while ((e != NULL) && (e != last_e)) { 1206 stream = e->open_stream(file_name, CHECK_NULL); 1207 if (!context.check(stream, classpath_index)) { 1208 return NULL; 1209 } 1210 if (NULL != stream) { 1211 break; 1212 } 1213 e = e->next(); 1214 ++classpath_index; 1215 } 1216 } 1217 1218 if (NULL == stream) { 1219 if (DumpSharedSpaces) { 1220 tty->print_cr("Preload Warning: Cannot find %s", class_name); 1221 } 1222 return NULL; 1223 } 1224 1225 stream->set_verify(context.should_verify(classpath_index)); 1226 1227 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); 1228 Handle protection_domain; 1229 1230 instanceKlassHandle result = KlassFactory::create_from_stream(stream, 1231 name, 1232 loader_data, 1233 protection_domain, 1234 NULL, // host_klass 1235 NULL, // cp_patches 1236 NULL, // parsed_name 1237 THREAD); 1238 if (HAS_PENDING_EXCEPTION) { 1239 if (DumpSharedSpaces) { 1240 tty->print_cr("Preload Error: Failed to load %s", class_name); 1241 } 1242 return NULL; 1243 } 1244 1245 jshort loader_type = classloader_type(name, e, classpath_index, CHECK_NULL); 1246 return context.record_result(classpath_index, loader_type, e, result, THREAD); 1247 } 1248 1249 // Initialize the class loader's access to methods in libzip. Parse and 1250 // process the boot classpath into a list ClassPathEntry objects. Once 1251 // this list has been created, it must not change order (see class PackageInfo) 1252 // it can be appended to and is by jvmti and the kernel vm. 1253 1254 void ClassLoader::initialize() { 1255 EXCEPTION_MARK; 1256 1257 if (UsePerfData) { 1258 // jvmstat performance counters 1259 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time"); 1260 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime"); 1261 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self"); 1262 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime"); 1263 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self"); 1264 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime"); 1265 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self"); 1266 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses"); 1267 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses"); 1268 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses"); 1269 1270 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime"); 1271 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self"); 1272 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime"); 1273 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime"); 1274 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime"); 1275 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime"); 1276 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self"); 1277 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount"); 1278 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses"); 1279 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime"); 1280 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self"); 1281 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes"); 1282 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes"); 1283 1284 1285 // The following performance counters are added for measuring the impact 1286 // of the bug fix of 6365597. They are mainly focused on finding out 1287 // the behavior of system & user-defined classloader lock, whether 1288 // ClassLoader.loadClass/findClass is being called synchronized or not. 1289 // Also two additional counters are created to see whether 'UnsyncloadClass' 1290 // flag is being set or not and how many times load_instance_class call 1291 // fails with linkageError etc. 1292 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS, 1293 "systemLoaderLockContentionRate"); 1294 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS, 1295 "nonSystemLoaderLockContentionRate"); 1296 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS, 1297 "jvmFindLoadedClassNoLockCalls"); 1298 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS, 1299 "jvmDefineClassNoLockCalls"); 1300 1301 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS, 1302 "jniDefineClassNoLockCalls"); 1303 1304 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS, 1305 "unsafeDefineClassCalls"); 1306 1307 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet"); 1308 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS, 1309 "loadInstanceClassFailRate"); 1310 1311 // increment the isUnsyncloadClass counter if UnsyncloadClass is set. 1312 if (UnsyncloadClass) { 1313 _isUnsyncloadClass->inc(); 1314 } 1315 } 1316 1317 // lookup zip library entry points 1318 load_zip_library(); 1319 // lookup jimage library entry points 1320 load_jimage_library(); 1321 #if INCLUDE_CDS 1322 // initialize search path 1323 if (DumpSharedSpaces) { 1324 _shared_paths_misc_info = SharedClassUtil::allocate_shared_paths_misc_info(); 1325 } 1326 #endif 1327 setup_bootstrap_search_path(); 1328 } 1329 1330 #if INCLUDE_CDS 1331 void ClassLoader::initialize_shared_path() { 1332 if (DumpSharedSpaces) { 1333 ClassLoaderExt::setup_search_paths(); 1334 _shared_paths_misc_info->write_jint(0); // see comments in SharedPathsMiscInfo::check() 1335 } 1336 } 1337 #endif 1338 1339 jlong ClassLoader::classloader_time_ms() { 1340 return UsePerfData ? 1341 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1; 1342 } 1343 1344 jlong ClassLoader::class_init_count() { 1345 return UsePerfData ? _perf_classes_inited->get_value() : -1; 1346 } 1347 1348 jlong ClassLoader::class_init_time_ms() { 1349 return UsePerfData ? 1350 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1; 1351 } 1352 1353 jlong ClassLoader::class_verify_time_ms() { 1354 return UsePerfData ? 1355 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1; 1356 } 1357 1358 jlong ClassLoader::class_link_count() { 1359 return UsePerfData ? _perf_classes_linked->get_value() : -1; 1360 } 1361 1362 jlong ClassLoader::class_link_time_ms() { 1363 return UsePerfData ? 1364 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1; 1365 } 1366 1367 int ClassLoader::compute_Object_vtable() { 1368 // hardwired for JDK1.2 -- would need to duplicate class file parsing 1369 // code to determine actual value from file 1370 // Would be value '11' if finals were in vtable 1371 int JDK_1_2_Object_vtable_size = 5; 1372 return JDK_1_2_Object_vtable_size * vtableEntry::size(); 1373 } 1374 1375 1376 void classLoader_init() { 1377 ClassLoader::initialize(); 1378 } 1379 1380 1381 bool ClassLoader::get_canonical_path(const char* orig, char* out, int len) { 1382 assert(orig != NULL && out != NULL && len > 0, "bad arguments"); 1383 if (CanonicalizeEntry != NULL) { 1384 JavaThread* THREAD = JavaThread::current(); 1385 JNIEnv* env = THREAD->jni_environment(); 1386 ResourceMark rm(THREAD); 1387 1388 // os::native_path writes into orig_copy 1389 char* orig_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, strlen(orig)+1); 1390 strcpy(orig_copy, orig); 1391 if ((CanonicalizeEntry)(env, os::native_path(orig_copy), out, len) < 0) { 1392 return false; 1393 } 1394 } else { 1395 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing 1396 strncpy(out, orig, len); 1397 out[len - 1] = '\0'; 1398 } 1399 return true; 1400 } 1401 1402 void ClassLoader::create_javabase() { 1403 Thread* THREAD = Thread::current(); 1404 1405 // Create java.base's module entry for the boot 1406 // class loader prior to loading j.l.Ojbect. 1407 ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data(); 1408 1409 // Get module entry table 1410 ModuleEntryTable* null_cld_modules = null_cld->modules(); 1411 if (null_cld_modules == NULL) { 1412 vm_exit_during_initialization("No ModuleEntryTable for the boot class loader"); 1413 } 1414 1415 { 1416 MutexLocker ml(Module_lock, THREAD); 1417 ModuleEntry* jb_module = null_cld_modules->locked_create_entry_or_null(Handle(NULL), vmSymbols::java_base(), NULL, NULL, null_cld); 1418 if (jb_module == NULL) { 1419 vm_exit_during_initialization("Unable to create ModuleEntry for java.base"); 1420 } 1421 ModuleEntryTable::set_javabase_module(jb_module); 1422 } 1423 1424 // When looking for the jimage file, only 1425 // search the boot loader's module path which 1426 // can consist of [-Xpatch]; exploded build | modules 1427 // Do not search the boot loader's append path. 1428 ClassPathEntry* e = _first_entry; 1429 ClassPathEntry* last_e = _first_append_entry; 1430 while ((e != NULL) && (e != last_e)) { 1431 JImageFile *jimage = e->jimage(); 1432 if (jimage != NULL && e->is_jrt()) { 1433 set_has_jimage(true); 1434 #if INCLUDE_CDS 1435 ClassLoader::initialize_module_loader_map(jimage); 1436 #endif 1437 return; 1438 } 1439 e = e->next(); 1440 } 1441 } 1442 1443 #ifndef PRODUCT 1444 1445 // CompileTheWorld 1446 // 1447 // Iterates over all class path entries and forces compilation of all methods 1448 // in all classes found. Currently, only zip/jar archives are searched. 1449 // 1450 // The classes are loaded by the Java level bootstrap class loader, and the 1451 // initializer is called. If DelayCompilationDuringStartup is true (default), 1452 // the interpreter will run the initialization code. Note that forcing 1453 // initialization in this way could potentially lead to initialization order 1454 // problems, in which case we could just force the initialization bit to be set. 1455 1456 1457 // We need to iterate over the contents of a zip/jar file, so we replicate the 1458 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile, 1459 // since jzfile already has a void* definition. 1460 // 1461 // Note that this is only used in debug mode. 1462 // 1463 // HotSpot integration note: 1464 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build 1465 1466 1467 // JDK 1.3 version 1468 typedef struct real_jzentry { /* Zip file entry */ 1469 char *name; /* entry name */ 1470 jint time; /* modification time */ 1471 jint size; /* size of uncompressed data */ 1472 jint csize; /* size of compressed data (zero if uncompressed) */ 1473 jint crc; /* crc of uncompressed data */ 1474 char *comment; /* optional zip file comment */ 1475 jbyte *extra; /* optional extra data */ 1476 jint pos; /* position of LOC header (if negative) or data */ 1477 } real_jzentry; 1478 1479 typedef struct real_jzfile { /* Zip file */ 1480 char *name; /* zip file name */ 1481 jint refs; /* number of active references */ 1482 jint fd; /* open file descriptor */ 1483 void *lock; /* read lock */ 1484 char *comment; /* zip file comment */ 1485 char *msg; /* zip error message */ 1486 void *entries; /* array of hash cells */ 1487 jint total; /* total number of entries */ 1488 unsigned short *table; /* Hash chain heads: indexes into entries */ 1489 jint tablelen; /* number of hash eads */ 1490 real_jzfile *next; /* next zip file in search list */ 1491 jzentry *cache; /* we cache the most recently freed jzentry */ 1492 /* Information on metadata names in META-INF directory */ 1493 char **metanames; /* array of meta names (may have null names) */ 1494 jint metacount; /* number of slots in metanames array */ 1495 /* If there are any per-entry comments, they are in the comments array */ 1496 char **comments; 1497 } real_jzfile; 1498 1499 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) { 1500 // For now we only compile all methods in all classes in zip/jar files 1501 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir); 1502 tty->cr(); 1503 } 1504 1505 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) { 1506 real_jzfile* zip = (real_jzfile*) _zip; 1507 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); 1508 tty->cr(); 1509 // Iterate over all entries in zip file 1510 for (int n = 0; ; n++) { 1511 real_jzentry * ze = (real_jzentry *)((*GetNextEntry)(_zip, n)); 1512 if (ze == NULL) break; 1513 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); 1514 } 1515 if (HAS_PENDING_EXCEPTION) { 1516 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1517 CLEAR_PENDING_EXCEPTION; 1518 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); 1519 tty->print_cr("Increase class metadata storage if a limit was set"); 1520 } else { 1521 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); 1522 } 1523 } 1524 } 1525 1526 void ClassLoader::compile_the_world() { 1527 EXCEPTION_MARK; 1528 HandleMark hm(THREAD); 1529 ResourceMark rm(THREAD); 1530 1531 // Find bootstrap loader 1532 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader()); 1533 // Iterate over all bootstrap class path entries 1534 ClassPathEntry* e = _first_entry; 1535 jlong start = os::javaTimeMillis(); 1536 while (e != NULL) { 1537 // We stop at "modules" jimage, unless it is the first bootstrap path entry 1538 if (e->is_jrt() && e != _first_entry) break; 1539 e->compile_the_world(system_class_loader, CATCH); 1540 e = e->next(); 1541 } 1542 jlong end = os::javaTimeMillis(); 1543 tty->print_cr("CompileTheWorld : Done (%d classes, %d methods, " JLONG_FORMAT " ms)", 1544 _compile_the_world_class_counter, _compile_the_world_method_counter, (end - start)); 1545 { 1546 // Print statistics as if before normal exit: 1547 extern void print_statistics(); 1548 print_statistics(); 1549 } 1550 vm_exit(0); 1551 } 1552 1553 int ClassLoader::_compile_the_world_class_counter = 0; 1554 int ClassLoader::_compile_the_world_method_counter = 0; 1555 static int _codecache_sweep_counter = 0; 1556 1557 // Filter out all exceptions except OOMs 1558 static void clear_pending_exception_if_not_oom(TRAPS) { 1559 if (HAS_PENDING_EXCEPTION && 1560 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1561 CLEAR_PENDING_EXCEPTION; 1562 } 1563 // The CHECK at the caller will propagate the exception out 1564 } 1565 1566 /** 1567 * Returns if the given method should be compiled when doing compile-the-world. 1568 * 1569 * TODO: This should be a private method in a CompileTheWorld class. 1570 */ 1571 static bool can_be_compiled(methodHandle m, int comp_level) { 1572 assert(CompileTheWorld, "must be"); 1573 1574 // It's not valid to compile a native wrapper for MethodHandle methods 1575 // that take a MemberName appendix since the bytecode signature is not 1576 // correct. 1577 vmIntrinsics::ID iid = m->intrinsic_id(); 1578 if (MethodHandles::is_signature_polymorphic(iid) && MethodHandles::has_member_arg(iid)) { 1579 return false; 1580 } 1581 1582 return CompilationPolicy::can_be_compiled(m, comp_level); 1583 } 1584 1585 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) { 1586 if (string_ends_with(name, ".class")) { 1587 // We have a .class file 1588 int len = (int)strlen(name); 1589 char buffer[2048]; 1590 strncpy(buffer, name, len - 6); 1591 buffer[len-6] = 0; 1592 // If the file has a period after removing .class, it's not really a 1593 // valid class file. The class loader will check everything else. 1594 if (strchr(buffer, '.') == NULL) { 1595 _compile_the_world_class_counter++; 1596 if (_compile_the_world_class_counter > CompileTheWorldStopAt) return; 1597 1598 // Construct name without extension 1599 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK); 1600 // Use loader to load and initialize class 1601 Klass* ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD); 1602 instanceKlassHandle k (THREAD, ik); 1603 if (k.not_null() && !HAS_PENDING_EXCEPTION) { 1604 k->initialize(THREAD); 1605 } 1606 bool exception_occurred = HAS_PENDING_EXCEPTION; 1607 clear_pending_exception_if_not_oom(CHECK); 1608 if (CompileTheWorldPreloadClasses && k.not_null()) { 1609 ConstantPool::preload_and_initialize_all_classes(k->constants(), THREAD); 1610 if (HAS_PENDING_EXCEPTION) { 1611 // If something went wrong in preloading we just ignore it 1612 clear_pending_exception_if_not_oom(CHECK); 1613 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_class_counter, buffer); 1614 } 1615 } 1616 1617 if (_compile_the_world_class_counter >= CompileTheWorldStartAt) { 1618 if (k.is_null() || exception_occurred) { 1619 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class 1620 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_class_counter, buffer); 1621 } else { 1622 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_class_counter, buffer); 1623 // Preload all classes to get around uncommon traps 1624 // Iterate over all methods in class 1625 int comp_level = CompilationPolicy::policy()->initial_compile_level(); 1626 for (int n = 0; n < k->methods()->length(); n++) { 1627 methodHandle m (THREAD, k->methods()->at(n)); 1628 if (can_be_compiled(m, comp_level)) { 1629 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) { 1630 // Give sweeper a chance to keep up with CTW 1631 VM_ForceSafepoint op; 1632 VMThread::execute(&op); 1633 _codecache_sweep_counter = 0; 1634 } 1635 // Force compilation 1636 CompileBroker::compile_method(m, InvocationEntryBci, comp_level, 1637 methodHandle(), 0, CompileTask::Reason_CTW, THREAD); 1638 if (HAS_PENDING_EXCEPTION) { 1639 clear_pending_exception_if_not_oom(CHECK); 1640 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 1641 } else { 1642 _compile_the_world_method_counter++; 1643 } 1644 if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) { 1645 // Clobber the first compile and force second tier compilation 1646 nmethod* nm = m->code(); 1647 if (nm != NULL && !m->is_method_handle_intrinsic()) { 1648 // Throw out the code so that the code cache doesn't fill up 1649 nm->make_not_entrant(); 1650 m->clear_code(); 1651 } 1652 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization, 1653 methodHandle(), 0, CompileTask::Reason_CTW, THREAD); 1654 if (HAS_PENDING_EXCEPTION) { 1655 clear_pending_exception_if_not_oom(CHECK); 1656 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 1657 } else { 1658 _compile_the_world_method_counter++; 1659 } 1660 } 1661 } else { 1662 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 1663 } 1664 1665 nmethod* nm = m->code(); 1666 if (nm != NULL && !m->is_method_handle_intrinsic()) { 1667 // Throw out the code so that the code cache doesn't fill up 1668 nm->make_not_entrant(); 1669 m->clear_code(); 1670 } 1671 } 1672 } 1673 } 1674 } 1675 } 1676 } 1677 1678 #endif //PRODUCT 1679 1680 // Please keep following two functions at end of this file. With them placed at top or in middle of the file, 1681 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589. 1682 void PerfClassTraceTime::initialize() { 1683 if (!UsePerfData) return; 1684 1685 if (_eventp != NULL) { 1686 // increment the event counter 1687 _eventp->inc(); 1688 } 1689 1690 // stop the current active thread-local timer to measure inclusive time 1691 _prev_active_event = -1; 1692 for (int i=0; i < EVENT_TYPE_COUNT; i++) { 1693 if (_timers[i].is_active()) { 1694 assert(_prev_active_event == -1, "should have only one active timer"); 1695 _prev_active_event = i; 1696 _timers[i].stop(); 1697 } 1698 } 1699 1700 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) { 1701 // start the inclusive timer if not recursively called 1702 _t.start(); 1703 } 1704 1705 // start thread-local timer of the given event type 1706 if (!_timers[_event_type].is_active()) { 1707 _timers[_event_type].start(); 1708 } 1709 } 1710 1711 PerfClassTraceTime::~PerfClassTraceTime() { 1712 if (!UsePerfData) return; 1713 1714 // stop the thread-local timer as the event completes 1715 // and resume the thread-local timer of the event next on the stack 1716 _timers[_event_type].stop(); 1717 jlong selftime = _timers[_event_type].ticks(); 1718 1719 if (_prev_active_event >= 0) { 1720 _timers[_prev_active_event].start(); 1721 } 1722 1723 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return; 1724 1725 // increment the counters only on the leaf call 1726 _t.stop(); 1727 _timep->inc(_t.ticks()); 1728 if (_selftimep != NULL) { 1729 _selftimep->inc(selftime); 1730 } 1731 // add all class loading related event selftime to the accumulated time counter 1732 ClassLoader::perf_accumulated_time()->inc(selftime); 1733 1734 // reset the timer 1735 _timers[_event_type].reset(); 1736 }