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 _multi_versioned = _unknown; 237 } 238 239 ClassPathZipEntry::~ClassPathZipEntry() { 240 if (ZipClose != NULL) { 241 (*ZipClose)(_zip); 242 } 243 FREE_C_HEAP_ARRAY(char, _zip_name); 244 } 245 246 u1* ClassPathZipEntry::open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS) { 247 // enable call to C land 248 JavaThread* thread = JavaThread::current(); 249 ThreadToNativeFromVM ttn(thread); 250 // check whether zip archive contains name 251 jint name_len; 252 jzentry* entry = (*FindEntry)(_zip, name, filesize, &name_len); 253 if (entry == NULL) return NULL; 254 u1* buffer; 255 char name_buf[128]; 256 char* filename; 257 if (name_len < 128) { 258 filename = name_buf; 259 } else { 260 filename = NEW_RESOURCE_ARRAY(char, name_len + 1); 261 } 262 263 // file found, get pointer to the entry in mmapped jar file. 264 if (ReadMappedEntry == NULL || 265 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) { 266 // mmapped access not available, perhaps due to compression, 267 // read contents into resource array 268 int size = (*filesize) + ((nul_terminate) ? 1 : 0); 269 buffer = NEW_RESOURCE_ARRAY(u1, size); 270 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL; 271 } 272 273 // return result 274 if (nul_terminate) { 275 buffer[*filesize] = 0; 276 } 277 return buffer; 278 } 279 280 #if INCLUDE_CDS 281 u1* ClassPathZipEntry::open_versioned_entry(const char* name, jint* filesize, TRAPS) { 282 u1* buffer = NULL; 283 if (!_is_boot_append) { 284 assert(DumpSharedSpaces, "Should be called only for non-boot entries during dump time"); 285 // We presume default is multi-release enabled 286 const char* multi_ver = Arguments::get_property("jdk.util.jar.enableMultiRelease"); 287 const char* verstr = Arguments::get_property("jdk.util.jar.version"); 288 bool is_multi_ver = (multi_ver == NULL || 289 strcmp(multi_ver, "true") == 0 || 290 strcmp(multi_ver, "force") == 0) && 291 is_multiple_versioned(THREAD); 292 // command line version setting 293 int version = 0; 294 const int base_version = 8; // JDK8 295 int cur_ver = JDK_Version::current().major_version(); 296 if (verstr != NULL) { 297 version = atoi(verstr); 298 if (version < base_version || version > cur_ver) { 299 is_multi_ver = false; 300 // print out warning, do not use assertion here since it will continue to look 301 // for proper version. 302 warning("JDK%d is not supported in multiple version jars", version); 303 } 304 } 305 306 if (is_multi_ver) { 307 int n; 308 char entry_name[JVM_MAXPATHLEN]; 309 if (version > 0) { 310 jio_snprintf(entry_name, sizeof(entry_name), "META-INF/versions/%d/%s", version, name); 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 jio_snprintf(entry_name, sizeof(entry_name), "META-INF/versions/%d/%s", i, name); 319 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL); 320 if (buffer != NULL) { 321 break; 322 } 323 } 324 } 325 } 326 } 327 return buffer; 328 } 329 330 bool ClassPathZipEntry::is_multiple_versioned(TRAPS) { 331 assert(DumpSharedSpaces, "called only at dump time"); 332 if (_multi_versioned != _unknown) { 333 return (_multi_versioned == _yes) ? true : false; 334 } 335 jint size; 336 char* buffer = (char*)open_entry("META-INF/MANIFEST.MF", &size, true, CHECK_false); 337 if (buffer != NULL) { 338 char* p = buffer; 339 for ( ; *p; ++p) *p = tolower(*p); 340 if (strstr(buffer, "multi-release: true") != NULL) { 341 _multi_versioned = _yes; 342 return true; 343 } 344 } 345 _multi_versioned = _no; 346 return false; 347 } 348 #endif // INCLUDE_CDS 349 350 ClassFileStream* ClassPathZipEntry::open_stream(const char* name, TRAPS) { 351 jint filesize; 352 u1* buffer = open_versioned_entry(name, &filesize, CHECK_NULL); 353 if (buffer == NULL) { 354 buffer = open_entry(name, &filesize, false, CHECK_NULL); 355 if (buffer == NULL) { 356 return NULL; 357 } 358 } 359 if (UsePerfData) { 360 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize); 361 } 362 // Resource allocated 363 return new ClassFileStream(buffer, 364 filesize, 365 _zip_name, 366 ClassFileStream::verify); 367 } 368 369 // invoke function for each entry in the zip file 370 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) { 371 JavaThread* thread = JavaThread::current(); 372 HandleMark handle_mark(thread); 373 ThreadToNativeFromVM ttn(thread); 374 for (int n = 0; ; n++) { 375 jzentry * ze = ((*GetNextEntry)(_zip, n)); 376 if (ze == NULL) break; 377 (*f)(ze->name, context); 378 } 379 } 380 381 ClassPathImageEntry::ClassPathImageEntry(JImageFile* jimage, const char* name) : 382 ClassPathEntry(), 383 _jimage(jimage) { 384 guarantee(jimage != NULL, "jimage file is null"); 385 guarantee(name != NULL, "jimage file name is null"); 386 size_t len = strlen(name) + 1; 387 _name = NEW_C_HEAP_ARRAY(const char, len, mtClass); 388 strncpy((char *)_name, name, len); 389 } 390 391 ClassPathImageEntry::~ClassPathImageEntry() { 392 if (_name != NULL) { 393 FREE_C_HEAP_ARRAY(const char, _name); 394 _name = NULL; 395 } 396 if (_jimage != NULL) { 397 (*JImageClose)(_jimage); 398 _jimage = NULL; 399 } 400 } 401 402 void ClassPathImageEntry::name_to_package(const char* name, char* buffer, int length) { 403 const char *pslash = strrchr(name, '/'); 404 if (pslash == NULL) { 405 buffer[0] = '\0'; 406 return; 407 } 408 int len = pslash - name; 409 #if INCLUDE_CDS 410 if (len <= 0 && DumpSharedSpaces) { 411 buffer[0] = '\0'; 412 return; 413 } 414 #endif 415 assert(len > 0, "Bad length for package name"); 416 if (len >= length) { 417 buffer[0] = '\0'; 418 return; 419 } 420 // drop name after last slash (including slash) 421 // Ex., "java/lang/String.class" => "java/lang" 422 strncpy(buffer, name, len); 423 // ensure string termination (strncpy does not guarantee) 424 buffer[len] = '\0'; 425 } 426 427 // For a class in a named module, look it up in the jimage file using this syntax: 428 // /<module-name>/<package-name>/<base-class> 429 // 430 // Assumptions: 431 // 1. There are no unnamed modules in the jimage file. 432 // 2. A package is in at most one module in the jimage file. 433 // 434 ClassFileStream* ClassPathImageEntry::open_stream(const char* name, TRAPS) { 435 jlong size; 436 JImageLocationRef location = (*JImageFindResource)(_jimage, "", get_jimage_version_string(), name, &size); 437 438 if (location == 0) { 439 char package[JIMAGE_MAX_PATH]; 440 name_to_package(name, package, JIMAGE_MAX_PATH); 441 442 #if INCLUDE_CDS 443 if (package[0] == '\0' && DumpSharedSpaces) { 444 return NULL; 445 } 446 #endif 447 if (package[0] != '\0') { 448 if (!Universe::is_module_initialized()) { 449 location = (*JImageFindResource)(_jimage, "java.base", get_jimage_version_string(), name, &size); 450 #if INCLUDE_CDS 451 // CDS uses the boot class loader to load classes whose packages are in 452 // modules defined for other class loaders. So, for now, get their module 453 // names from the "modules" jimage file. 454 if (DumpSharedSpaces && location == 0) { 455 const char* module_name = (*JImagePackageToModule)(_jimage, package); 456 if (module_name != NULL) { 457 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size); 458 } 459 } 460 #endif 461 462 } else { 463 // Get boot class loader's package entry table 464 PackageEntryTable* pkgEntryTable = 465 ClassLoaderData::the_null_class_loader_data()->packages(); 466 // Get package's package entry 467 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(package, CHECK_NULL); 468 PackageEntry* package_entry = pkgEntryTable->lookup_only(pkg_symbol); 469 470 if (package_entry != NULL) { 471 ResourceMark rm; 472 // Get the module name 473 ModuleEntry* module = package_entry->module(); 474 assert(module != NULL, "Boot classLoader package missing module"); 475 assert(module->is_named(), "Boot classLoader package is in unnamed module"); 476 const char* module_name = module->name()->as_C_string(); 477 if (module_name != NULL) { 478 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size); 479 } 480 } 481 } 482 } 483 } 484 if (location != 0) { 485 if (UsePerfData) { 486 ClassLoader::perf_sys_classfile_bytes_read()->inc(size); 487 } 488 char* data = NEW_RESOURCE_ARRAY(char, size); 489 (*JImageGetResource)(_jimage, location, data, size); 490 // Resource allocated 491 return new ClassFileStream((u1*)data, 492 (int)size, 493 _name, 494 ClassFileStream::verify); 495 } 496 497 return NULL; 498 } 499 500 #ifndef PRODUCT 501 bool ctw_visitor(JImageFile* jimage, 502 const char* module_name, const char* version, const char* package, 503 const char* name, const char* extension, void* arg) { 504 if (strcmp(extension, "class") == 0) { 505 Thread* THREAD = Thread::current(); 506 char path[JIMAGE_MAX_PATH]; 507 jio_snprintf(path, JIMAGE_MAX_PATH - 1, "%s/%s.class", package, name); 508 ClassLoader::compile_the_world_in(path, *(Handle*)arg, THREAD); 509 return !HAS_PENDING_EXCEPTION; 510 } 511 return true; 512 } 513 514 void ClassPathImageEntry::compile_the_world(Handle loader, TRAPS) { 515 tty->print_cr("CompileTheWorld : Compiling all classes in %s", name()); 516 tty->cr(); 517 (*JImageResourceIterator)(_jimage, (JImageResourceVisitor_t)ctw_visitor, (void *)&loader); 518 if (HAS_PENDING_EXCEPTION) { 519 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 520 CLEAR_PENDING_EXCEPTION; 521 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); 522 tty->print_cr("Increase class metadata storage if a limit was set"); 523 } else { 524 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); 525 } 526 } 527 } 528 #endif 529 530 bool ClassPathImageEntry::is_jrt() { 531 return ClassLoader::is_jrt(name()); 532 } 533 534 #if INCLUDE_CDS 535 void ClassLoader::exit_with_path_failure(const char* error, const char* message) { 536 assert(DumpSharedSpaces, "only called at dump time"); 537 tty->print_cr("Hint: enable -Xlog:classpath=info to diagnose the failure"); 538 vm_exit_during_initialization(error, message); 539 } 540 #endif 541 542 void ClassLoader::trace_class_path(const char* msg, const char* name) { 543 if (log_is_enabled(Info, classpath)) { 544 ResourceMark rm; 545 outputStream* out = Log(classpath)::info_stream(); 546 if (msg) { 547 out->print("%s", msg); 548 } 549 if (name) { 550 if (strlen(name) < 256) { 551 out->print("%s", name); 552 } else { 553 // For very long paths, we need to print each character separately, 554 // as print_cr() has a length limit 555 while (name[0] != '\0') { 556 out->print("%c", name[0]); 557 name++; 558 } 559 } 560 } 561 out->cr(); 562 } 563 } 564 565 #if INCLUDE_CDS 566 void ClassLoader::check_shared_classpath(const char *path) { 567 if (strcmp(path, "") == 0) { 568 exit_with_path_failure("Cannot have empty path in archived classpaths", NULL); 569 } 570 571 struct stat st; 572 if (os::stat(path, &st) == 0) { 573 if ((st.st_mode & S_IFREG) != S_IFREG) { // is directory 574 if (!os::dir_is_empty(path)) { 575 tty->print_cr("Error: non-empty directory '%s'", path); 576 exit_with_path_failure("CDS allows only empty directories in archived classpaths", NULL); 577 } 578 } 579 } 580 } 581 #endif 582 583 void ClassLoader::setup_bootstrap_search_path() { 584 assert(_first_entry == NULL, "should not setup bootstrap class search path twice"); 585 const char* sys_class_path = Arguments::get_sysclasspath(); 586 const char* java_class_path = Arguments::get_appclasspath(); 587 if (PrintSharedArchiveAndExit) { 588 // Don't print sys_class_path - this is the bootcp of this current VM process, not necessarily 589 // the same as the bootcp of the shared archive. 590 } else { 591 trace_class_path("bootstrap loader class path=", sys_class_path); 592 trace_class_path("classpath: ", java_class_path); 593 } 594 #if INCLUDE_CDS 595 if (DumpSharedSpaces) { 596 _shared_paths_misc_info->add_boot_classpath(sys_class_path); 597 } 598 #endif 599 setup_search_path(sys_class_path, true); 600 } 601 602 #if INCLUDE_CDS 603 int ClassLoader::get_shared_paths_misc_info_size() { 604 return _shared_paths_misc_info->get_used_bytes(); 605 } 606 607 void* ClassLoader::get_shared_paths_misc_info() { 608 return _shared_paths_misc_info->buffer(); 609 } 610 611 bool ClassLoader::check_shared_paths_misc_info(void *buf, int size) { 612 SharedPathsMiscInfo* checker = SharedClassUtil::allocate_shared_paths_misc_info((char*)buf, size); 613 bool result = checker->check(); 614 delete checker; 615 return result; 616 } 617 #endif 618 619 void ClassLoader::setup_search_path(const char *class_path, bool bootstrap_search) { 620 int offset = 0; 621 int len = (int)strlen(class_path); 622 int end = 0; 623 bool mark_append_entry = false; 624 625 // Iterate over class path entries 626 for (int start = 0; start < len; start = end) { 627 while (class_path[end] && class_path[end] != os::path_separator()[0]) { 628 end++; 629 } 630 EXCEPTION_MARK; 631 ResourceMark rm(THREAD); 632 mark_append_entry = (mark_append_entry || 633 (bootstrap_search && (start == Arguments::bootclassloader_append_index()))); 634 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1); 635 strncpy(path, &class_path[start], end - start); 636 path[end - start] = '\0'; 637 update_class_path_entry_list(path, false, mark_append_entry, false, bootstrap_search); 638 639 // Check on the state of the boot loader's append path 640 if (mark_append_entry && (_first_append_entry == NULL)) { 641 // Failure to mark the first append entry, most likely 642 // due to a non-existent path. Record the next entry 643 // as the first boot loader append entry. 644 mark_append_entry = true; 645 } else { 646 mark_append_entry = false; 647 } 648 649 #if INCLUDE_CDS 650 if (DumpSharedSpaces) { 651 check_shared_classpath(path); 652 } 653 #endif 654 while (class_path[end] == os::path_separator()[0]) { 655 end++; 656 } 657 } 658 } 659 660 ClassPathEntry* ClassLoader::create_class_path_entry(const char *path, const struct stat* st, 661 bool throw_exception, 662 bool is_boot_append, TRAPS) { 663 JavaThread* thread = JavaThread::current(); 664 ClassPathEntry* new_entry = NULL; 665 if ((st->st_mode & S_IFREG) == S_IFREG) { 666 // Regular file, should be a zip or jimage file 667 // Canonicalized filename 668 char canonical_path[JVM_MAXPATHLEN]; 669 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 670 // This matches the classic VM 671 if (throw_exception) { 672 THROW_MSG_(vmSymbols::java_io_IOException(), "Bad pathname", NULL); 673 } else { 674 return NULL; 675 } 676 } 677 jint error; 678 JImageFile* jimage =(*JImageOpen)(canonical_path, &error); 679 if (jimage != NULL) { 680 new_entry = new ClassPathImageEntry(jimage, canonical_path); 681 } else { 682 char* error_msg = NULL; 683 jzfile* zip; 684 { 685 // enable call to C land 686 ThreadToNativeFromVM ttn(thread); 687 HandleMark hm(thread); 688 zip = (*ZipOpen)(canonical_path, &error_msg); 689 } 690 if (zip != NULL && error_msg == NULL) { 691 new_entry = new ClassPathZipEntry(zip, path, is_boot_append); 692 } else { 693 ResourceMark rm(thread); 694 char *msg; 695 if (error_msg == NULL) { 696 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ; 697 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path); 698 } else { 699 int len = (int)(strlen(path) + strlen(error_msg) + 128); 700 msg = NEW_RESOURCE_ARRAY(char, len); ; 701 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path); 702 } 703 // Don't complain about bad jar files added via -Xbootclasspath/a:. 704 if (throw_exception && is_init_completed()) { 705 THROW_MSG_(vmSymbols::java_lang_ClassNotFoundException(), msg, NULL); 706 } else { 707 return NULL; 708 } 709 } 710 } 711 log_info(classpath)("opened: %s", path); 712 log_info(classload)("opened: %s", path); 713 } else { 714 // Directory 715 new_entry = new ClassPathDirEntry(path); 716 log_info(classload)("path: %s", path); 717 } 718 return new_entry; 719 } 720 721 722 // Create a class path zip entry for a given path (return NULL if not found 723 // or zip/JAR file cannot be opened) 724 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path, bool is_boot_append) { 725 // check for a regular file 726 struct stat st; 727 if (os::stat(path, &st) == 0) { 728 if ((st.st_mode & S_IFREG) == S_IFREG) { 729 char canonical_path[JVM_MAXPATHLEN]; 730 if (get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 731 char* error_msg = NULL; 732 jzfile* zip; 733 { 734 // enable call to C land 735 JavaThread* thread = JavaThread::current(); 736 ThreadToNativeFromVM ttn(thread); 737 HandleMark hm(thread); 738 zip = (*ZipOpen)(canonical_path, &error_msg); 739 } 740 if (zip != NULL && error_msg == NULL) { 741 // create using canonical path 742 return new ClassPathZipEntry(zip, canonical_path, is_boot_append); 743 } 744 } 745 } 746 } 747 return NULL; 748 } 749 750 // The boot class loader must adhere to specfic visibility rules. 751 // Prior to loading a class in a named package, the package is checked 752 // to see if it is in a module defined to the boot loader. If the 753 // package is not in a module defined to the boot loader, the class 754 // must be loaded only in the boot loader's append path, which 755 // consists of [-Xbootclasspath/a]; [jvmti appended entries] 756 void ClassLoader::set_first_append_entry(ClassPathEntry *new_entry) { 757 if (_first_append_entry == NULL) { 758 _first_append_entry = new_entry; 759 } 760 } 761 762 // returns true if entry already on class path 763 bool ClassLoader::contains_entry(ClassPathEntry *entry) { 764 ClassPathEntry* e = _first_entry; 765 while (e != NULL) { 766 // assume zip entries have been canonicalized 767 if (strcmp(entry->name(), e->name()) == 0) { 768 return true; 769 } 770 e = e->next(); 771 } 772 return false; 773 } 774 775 void ClassLoader::add_to_list(ClassPathEntry *new_entry) { 776 if (new_entry != NULL) { 777 if (_last_entry == NULL) { 778 _first_entry = _last_entry = new_entry; 779 } else { 780 _last_entry->set_next(new_entry); 781 _last_entry = new_entry; 782 } 783 } 784 _num_entries ++; 785 } 786 787 void ClassLoader::prepend_to_list(ClassPathEntry *new_entry) { 788 if (new_entry != NULL) { 789 if (_last_entry == NULL) { 790 _first_entry = _last_entry = new_entry; 791 } else { 792 new_entry->set_next(_first_entry); 793 _first_entry = new_entry; 794 } 795 } 796 _num_entries ++; 797 } 798 799 void ClassLoader::add_to_list(const char *apath) { 800 update_class_path_entry_list((char*)apath, false, false, false, false); 801 } 802 803 void ClassLoader::prepend_to_list(const char *apath) { 804 update_class_path_entry_list((char*)apath, false, false, true, false); 805 } 806 807 // Returns true IFF the file/dir exists and the entry was successfully created. 808 bool ClassLoader::update_class_path_entry_list(const char *path, 809 bool check_for_duplicates, 810 bool mark_append_entry, 811 bool prepend_entry, 812 bool is_boot_append, 813 bool throw_exception) { 814 struct stat st; 815 if (os::stat(path, &st) == 0) { 816 // File or directory found 817 ClassPathEntry* new_entry = NULL; 818 Thread* THREAD = Thread::current(); 819 new_entry = create_class_path_entry(path, &st, throw_exception, is_boot_append, CHECK_(false)); 820 if (new_entry == NULL) { 821 return false; 822 } 823 824 // Ensure that the first boot loader append entry will always be set correctly. 825 assert((!mark_append_entry || 826 (mark_append_entry && (!check_for_duplicates || !contains_entry(new_entry)))), 827 "failed to mark boot loader's first append boundary"); 828 829 // Do not reorder the bootclasspath which would break get_system_package(). 830 // Add new entry to linked list 831 832 if (!check_for_duplicates || !contains_entry(new_entry)) { 833 ClassLoaderExt::add_class_path_entry(path, check_for_duplicates, new_entry, prepend_entry); 834 if (mark_append_entry) { 835 set_first_append_entry(new_entry); 836 } 837 } 838 return true; 839 } else { 840 #if INCLUDE_CDS 841 if (DumpSharedSpaces) { 842 _shared_paths_misc_info->add_nonexist_path(path); 843 } 844 #endif 845 return false; 846 } 847 } 848 849 void ClassLoader::print_bootclasspath() { 850 ClassPathEntry* e = _first_entry; 851 tty->print("[bootclasspath= "); 852 while (e != NULL) { 853 tty->print("%s ;", e->name()); 854 e = e->next(); 855 } 856 tty->print_cr("]"); 857 } 858 859 void ClassLoader::load_zip_library() { 860 assert(ZipOpen == NULL, "should not load zip library twice"); 861 // First make sure native library is loaded 862 os::native_java_library(); 863 // Load zip library 864 char path[JVM_MAXPATHLEN]; 865 char ebuf[1024]; 866 void* handle = NULL; 867 if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip")) { 868 handle = os::dll_load(path, ebuf, sizeof ebuf); 869 } 870 if (handle == NULL) { 871 vm_exit_during_initialization("Unable to load ZIP library", path); 872 } 873 // Lookup zip entry points 874 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open")); 875 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close")); 876 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry")); 877 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry")); 878 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, os::dll_lookup(handle, "ZIP_ReadMappedEntry")); 879 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry")); 880 ZipInflateFully = CAST_TO_FN_PTR(ZipInflateFully_t, os::dll_lookup(handle, "ZIP_InflateFully")); 881 Crc32 = CAST_TO_FN_PTR(Crc32_t, os::dll_lookup(handle, "ZIP_CRC32")); 882 883 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL 884 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || 885 GetNextEntry == NULL || Crc32 == NULL) { 886 vm_exit_during_initialization("Corrupted ZIP library", path); 887 } 888 889 if (ZipInflateFully == NULL) { 890 vm_exit_during_initialization("Corrupted ZIP library ZIP_InflateFully missing", path); 891 } 892 893 // Lookup canonicalize entry in libjava.dll 894 void *javalib_handle = os::native_java_library(); 895 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize")); 896 // This lookup only works on 1.3. Do not check for non-null here 897 } 898 899 void ClassLoader::load_jimage_library() { 900 // First make sure native library is loaded 901 os::native_java_library(); 902 // Load jimage library 903 char path[JVM_MAXPATHLEN]; 904 char ebuf[1024]; 905 void* handle = NULL; 906 if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "jimage")) { 907 handle = os::dll_load(path, ebuf, sizeof ebuf); 908 } 909 if (handle == NULL) { 910 vm_exit_during_initialization("Unable to load jimage library", path); 911 } 912 913 // Lookup jimage entry points 914 JImageOpen = CAST_TO_FN_PTR(JImageOpen_t, os::dll_lookup(handle, "JIMAGE_Open")); 915 guarantee(JImageOpen != NULL, "function JIMAGE_Open not found"); 916 JImageClose = CAST_TO_FN_PTR(JImageClose_t, os::dll_lookup(handle, "JIMAGE_Close")); 917 guarantee(JImageClose != NULL, "function JIMAGE_Close not found"); 918 JImagePackageToModule = CAST_TO_FN_PTR(JImagePackageToModule_t, os::dll_lookup(handle, "JIMAGE_PackageToModule")); 919 guarantee(JImagePackageToModule != NULL, "function JIMAGE_PackageToModule not found"); 920 JImageFindResource = CAST_TO_FN_PTR(JImageFindResource_t, os::dll_lookup(handle, "JIMAGE_FindResource")); 921 guarantee(JImageFindResource != NULL, "function JIMAGE_FindResource not found"); 922 JImageGetResource = CAST_TO_FN_PTR(JImageGetResource_t, os::dll_lookup(handle, "JIMAGE_GetResource")); 923 guarantee(JImageGetResource != NULL, "function JIMAGE_GetResource not found"); 924 JImageResourceIterator = CAST_TO_FN_PTR(JImageResourceIterator_t, os::dll_lookup(handle, "JIMAGE_ResourceIterator")); 925 guarantee(JImageResourceIterator != NULL, "function JIMAGE_ResourceIterator not found"); 926 } 927 928 jboolean ClassLoader::decompress(void *in, u8 inSize, void *out, u8 outSize, char **pmsg) { 929 return (*ZipInflateFully)(in, inSize, out, outSize, pmsg); 930 } 931 932 int ClassLoader::crc32(int crc, const char* buf, int len) { 933 assert(Crc32 != NULL, "ZIP_CRC32 is not found"); 934 return (*Crc32)(crc, (const jbyte*)buf, len); 935 } 936 937 #if INCLUDE_CDS 938 void ClassLoader::initialize_module_loader_map(JImageFile* jimage) { 939 jlong size; 940 JImageLocationRef location = (*JImageFindResource)(jimage, "java.base", get_jimage_version_string(), MODULE_LOADER_MAP, &size); 941 if (location == 0) { 942 vm_exit_during_initialization( 943 "Cannot find ModuleLoaderMap location from modules jimage.", NULL); 944 } 945 char* buffer = NEW_RESOURCE_ARRAY(char, size); 946 jlong read = (*JImageGetResource)(jimage, location, buffer, size); 947 if (read != size) { 948 vm_exit_during_initialization( 949 "Cannot find ModuleLoaderMap resource from modules jimage.", NULL); 950 } 951 char* char_buf = (char*)buffer; 952 int buflen = (int)strlen(char_buf); 953 char* begin_ptr = char_buf; 954 char* end_ptr = strchr(begin_ptr, '\n'); 955 bool process_boot_modules = false; 956 _boot_modules_array = new (ResourceObj::C_HEAP, mtInternal) 957 GrowableArray<char*>(INITIAL_BOOT_MODULES_ARRAY_SIZE, true); 958 _platform_modules_array = new (ResourceObj::C_HEAP, mtInternal) 959 GrowableArray<char*>(INITIAL_PLATFORM_MODULES_ARRAY_SIZE, true); 960 while (end_ptr != NULL && (end_ptr - char_buf) < buflen) { 961 // Allocate a buffer from the C heap to be appended to the _boot_modules_array 962 // or the _platform_modules_array. 963 char* temp_name = NEW_C_HEAP_ARRAY(char, (size_t)(end_ptr - begin_ptr + 1), mtInternal); 964 strncpy(temp_name, begin_ptr, end_ptr - begin_ptr); 965 temp_name[end_ptr - begin_ptr] = '\0'; 966 if (strncmp(temp_name, "BOOT", 4) == 0) { 967 process_boot_modules = true; 968 FREE_C_HEAP_ARRAY(char, temp_name); 969 } else if (strncmp(temp_name, "PLATFORM", 8) == 0) { 970 process_boot_modules = false; 971 FREE_C_HEAP_ARRAY(char, temp_name); 972 } else { 973 // module name 974 if (process_boot_modules) { 975 _boot_modules_array->append(temp_name); 976 } else { 977 _platform_modules_array->append(temp_name); 978 } 979 } 980 begin_ptr = ++end_ptr; 981 end_ptr = strchr(begin_ptr, '\n'); 982 } 983 FREE_RESOURCE_ARRAY(u1, buffer, size); 984 } 985 #endif 986 987 // Function add_package extracts the package from the fully qualified class name 988 // and checks if the package is in the boot loader's package entry table. If so, 989 // then it sets the classpath_index in the package entry record. 990 // 991 // The classpath_index field is used to find the entry on the boot loader class 992 // path for packages with classes loaded by the boot loader from -Xbootclasspath/a 993 // in an unnamed module. It is also used to indicate (for all packages whose 994 // classes are loaded by the boot loader) that at least one of the package's 995 // classes has been loaded. 996 bool ClassLoader::add_package(const char *fullq_class_name, s2 classpath_index, TRAPS) { 997 assert(fullq_class_name != NULL, "just checking"); 998 999 // Get package name from fully qualified class name. 1000 const char *cp = strrchr(fullq_class_name, '/'); 1001 if (cp != NULL) { 1002 int len = cp - fullq_class_name; 1003 PackageEntryTable* pkg_entry_tbl = 1004 ClassLoaderData::the_null_class_loader_data()->packages(); 1005 TempNewSymbol pkg_symbol = 1006 SymbolTable::new_symbol(fullq_class_name, len, CHECK_false); 1007 PackageEntry* pkg_entry = pkg_entry_tbl->lookup_only(pkg_symbol); 1008 if (pkg_entry != NULL) { 1009 assert(classpath_index != -1, "Unexpected classpath_index"); 1010 pkg_entry->set_classpath_index(classpath_index); 1011 } else { 1012 return false; 1013 } 1014 } 1015 return true; 1016 } 1017 1018 oop ClassLoader::get_system_package(const char* name, TRAPS) { 1019 // Look up the name in the boot loader's package entry table. 1020 if (name != NULL) { 1021 TempNewSymbol package_sym = SymbolTable::new_symbol(name, (int)strlen(name), CHECK_NULL); 1022 // Look for the package entry in the boot loader's package entry table. 1023 PackageEntry* package = 1024 ClassLoaderData::the_null_class_loader_data()->packages()->lookup_only(package_sym); 1025 1026 // Return NULL if package does not exist or if no classes in that package 1027 // have been loaded. 1028 if (package != NULL && package->has_loaded_class()) { 1029 ModuleEntry* module = package->module(); 1030 if (module->location() != NULL) { 1031 ResourceMark rm(THREAD); 1032 Handle ml = java_lang_String::create_from_str( 1033 module->location()->as_C_string(), THREAD); 1034 return ml(); 1035 } 1036 // Return entry on boot loader class path. 1037 Handle cph = java_lang_String::create_from_str( 1038 ClassLoader::classpath_entry(package->classpath_index())->name(), THREAD); 1039 return cph(); 1040 } 1041 } 1042 return NULL; 1043 } 1044 1045 objArrayOop ClassLoader::get_system_packages(TRAPS) { 1046 ResourceMark rm(THREAD); 1047 // List of pointers to PackageEntrys that have loaded classes. 1048 GrowableArray<PackageEntry*>* loaded_class_pkgs = new GrowableArray<PackageEntry*>(50); 1049 { 1050 MutexLocker ml(Module_lock, THREAD); 1051 1052 PackageEntryTable* pe_table = 1053 ClassLoaderData::the_null_class_loader_data()->packages(); 1054 1055 // Collect the packages that have at least one loaded class. 1056 for (int x = 0; x < pe_table->table_size(); x++) { 1057 for (PackageEntry* package_entry = pe_table->bucket(x); 1058 package_entry != NULL; 1059 package_entry = package_entry->next()) { 1060 if (package_entry->has_loaded_class()) { 1061 loaded_class_pkgs->append(package_entry); 1062 } 1063 } 1064 } 1065 } 1066 1067 1068 // Allocate objArray and fill with java.lang.String 1069 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 1070 loaded_class_pkgs->length(), CHECK_NULL); 1071 objArrayHandle result(THREAD, r); 1072 for (int x = 0; x < loaded_class_pkgs->length(); x++) { 1073 PackageEntry* package_entry = loaded_class_pkgs->at(x); 1074 Handle str = java_lang_String::create_from_symbol(package_entry->name(), CHECK_NULL); 1075 result->obj_at_put(x, str()); 1076 } 1077 return result(); 1078 } 1079 1080 #if INCLUDE_CDS 1081 s2 ClassLoader::module_to_classloader(const char* module_name) { 1082 1083 assert(_boot_modules_array != NULL, "_boot_modules_array is NULL"); 1084 assert(_platform_modules_array != NULL, "_platform_modules_array is NULL"); 1085 1086 int array_size = _boot_modules_array->length(); 1087 for (int i = 0; i < array_size; i++) { 1088 if (strcmp(module_name, _boot_modules_array->at(i)) == 0) { 1089 return BOOT_LOADER; 1090 } 1091 } 1092 1093 array_size = _platform_modules_array->length(); 1094 for (int i = 0; i < array_size; i++) { 1095 if (strcmp(module_name, _platform_modules_array->at(i)) == 0) { 1096 return PLATFORM_LOADER; 1097 } 1098 } 1099 1100 return APP_LOADER; 1101 } 1102 #endif 1103 1104 s2 ClassLoader::classloader_type(Symbol* class_name, ClassPathEntry* e, 1105 int classpath_index, TRAPS) { 1106 #if INCLUDE_CDS 1107 // obtain the classloader type based on the class name. 1108 // First obtain the package name based on the class name. Then obtain 1109 // the classloader type based on the package name from the jimage using 1110 // a jimage API. If the classloader type cannot be found from the 1111 // jimage, it is determined by the class path entry. 1112 jshort loader_type = ClassLoader::APP_LOADER; 1113 if (e->is_jrt()) { 1114 int length = 0; 1115 const jbyte* pkg_string = InstanceKlass::package_from_name(class_name, length); 1116 if (pkg_string != NULL) { 1117 ResourceMark rm; 1118 TempNewSymbol pkg_name = SymbolTable::new_symbol((const char*)pkg_string, length, THREAD); 1119 const char* pkg_name_C_string = (const char*)(pkg_name->as_C_string()); 1120 ClassPathImageEntry* cpie = (ClassPathImageEntry*)e; 1121 JImageFile* jimage = cpie->jimage(); 1122 char* module_name = (char*)(*JImagePackageToModule)(jimage, pkg_name_C_string); 1123 if (module_name != NULL) { 1124 loader_type = ClassLoader::module_to_classloader(module_name); 1125 } 1126 } 1127 } else if (ClassLoaderExt::is_boot_classpath(classpath_index)) { 1128 loader_type = ClassLoader::BOOT_LOADER; 1129 } 1130 return loader_type; 1131 #endif 1132 return ClassLoader::BOOT_LOADER; // the classloader type is ignored in non-CDS cases 1133 } 1134 1135 1136 // caller needs ResourceMark 1137 const char* ClassLoader::file_name_for_class_name(const char* class_name, 1138 int class_name_len) { 1139 assert(class_name != NULL, "invariant"); 1140 assert((int)strlen(class_name) == class_name_len, "invariant"); 1141 1142 static const char class_suffix[] = ".class"; 1143 1144 char* const file_name = NEW_RESOURCE_ARRAY(char, 1145 class_name_len + 1146 sizeof(class_suffix)); // includes term NULL 1147 1148 strncpy(file_name, class_name, class_name_len); 1149 strncpy(&file_name[class_name_len], class_suffix, sizeof(class_suffix)); 1150 1151 return file_name; 1152 } 1153 1154 instanceKlassHandle ClassLoader::load_class(Symbol* name, bool search_append_only, TRAPS) { 1155 1156 assert(name != NULL, "invariant"); 1157 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 1158 1159 ResourceMark rm; 1160 HandleMark hm; 1161 1162 const char* const class_name = name->as_C_string(); 1163 1164 EventMark m("loading class %s", class_name); 1165 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion); 1166 1167 const char* const file_name = file_name_for_class_name(class_name, 1168 name->utf8_length()); 1169 assert(file_name != NULL, "invariant"); 1170 1171 ClassLoaderExt::Context context(class_name, file_name, THREAD); 1172 1173 // Lookup stream for parsing .class file 1174 ClassFileStream* stream = NULL; 1175 s2 classpath_index = 0; 1176 1177 // If DumpSharedSpaces is true, boot loader visibility boundaries are set 1178 // to be _first_entry to the end (all path entries). 1179 // 1180 // If search_append_only is true, boot loader visibility boundaries are 1181 // set to be _fist_append_entry to the end. This includes: 1182 // [-Xbootclasspath/a]; [jvmti appended entries] 1183 // 1184 // If both DumpSharedSpaces and search_append_only are false, boot loader 1185 // visibility boundaries are set to be _first_entry to the entry before 1186 // the _first_append_entry. This would include: 1187 // [-Xpatch:<dirs>]; [exploded build | modules] 1188 // 1189 // DumpSharedSpaces and search_append_only are mutually exclusive and cannot 1190 // be true at the same time. 1191 ClassPathEntry* e = (search_append_only ? _first_append_entry : _first_entry); 1192 ClassPathEntry* last_e = 1193 (search_append_only || DumpSharedSpaces ? NULL : _first_append_entry); 1194 1195 { 1196 if (search_append_only) { 1197 // For the boot loader append path search, must calculate 1198 // the starting classpath_index prior to attempting to 1199 // load the classfile. 1200 ClassPathEntry *tmp_e = _first_entry; 1201 while ((tmp_e != NULL) && (tmp_e != _first_append_entry)) { 1202 tmp_e = tmp_e->next(); 1203 ++classpath_index; 1204 } 1205 } 1206 1207 // Attempt to load the classfile from either: 1208 // - [-Xpatch:dir]; exploded build | modules 1209 // or 1210 // - [-Xbootclasspath/a]; [jvmti appended entries] 1211 while ((e != NULL) && (e != last_e)) { 1212 stream = e->open_stream(file_name, CHECK_NULL); 1213 if (!context.check(stream, classpath_index)) { 1214 return NULL; 1215 } 1216 if (NULL != stream) { 1217 break; 1218 } 1219 e = e->next(); 1220 ++classpath_index; 1221 } 1222 } 1223 1224 if (NULL == stream) { 1225 if (DumpSharedSpaces) { 1226 tty->print_cr("Preload Warning: Cannot find %s", class_name); 1227 } 1228 return NULL; 1229 } 1230 1231 stream->set_verify(context.should_verify(classpath_index)); 1232 1233 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); 1234 Handle protection_domain; 1235 1236 instanceKlassHandle result = KlassFactory::create_from_stream(stream, 1237 name, 1238 loader_data, 1239 protection_domain, 1240 NULL, // host_klass 1241 NULL, // cp_patches 1242 NULL, // parsed_name 1243 THREAD); 1244 if (HAS_PENDING_EXCEPTION) { 1245 if (DumpSharedSpaces) { 1246 tty->print_cr("Preload Error: Failed to load %s", class_name); 1247 } 1248 return NULL; 1249 } 1250 1251 jshort loader_type = classloader_type(name, e, classpath_index, CHECK_NULL); 1252 return context.record_result(classpath_index, loader_type, e, result, THREAD); 1253 } 1254 1255 // Initialize the class loader's access to methods in libzip. Parse and 1256 // process the boot classpath into a list ClassPathEntry objects. Once 1257 // this list has been created, it must not change order (see class PackageInfo) 1258 // it can be appended to and is by jvmti and the kernel vm. 1259 1260 void ClassLoader::initialize() { 1261 EXCEPTION_MARK; 1262 1263 if (UsePerfData) { 1264 // jvmstat performance counters 1265 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time"); 1266 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime"); 1267 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self"); 1268 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime"); 1269 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self"); 1270 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime"); 1271 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self"); 1272 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses"); 1273 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses"); 1274 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses"); 1275 1276 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime"); 1277 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self"); 1278 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime"); 1279 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime"); 1280 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime"); 1281 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime"); 1282 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self"); 1283 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount"); 1284 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses"); 1285 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime"); 1286 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self"); 1287 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes"); 1288 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes"); 1289 1290 1291 // The following performance counters are added for measuring the impact 1292 // of the bug fix of 6365597. They are mainly focused on finding out 1293 // the behavior of system & user-defined classloader lock, whether 1294 // ClassLoader.loadClass/findClass is being called synchronized or not. 1295 // Also two additional counters are created to see whether 'UnsyncloadClass' 1296 // flag is being set or not and how many times load_instance_class call 1297 // fails with linkageError etc. 1298 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS, 1299 "systemLoaderLockContentionRate"); 1300 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS, 1301 "nonSystemLoaderLockContentionRate"); 1302 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS, 1303 "jvmFindLoadedClassNoLockCalls"); 1304 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS, 1305 "jvmDefineClassNoLockCalls"); 1306 1307 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS, 1308 "jniDefineClassNoLockCalls"); 1309 1310 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS, 1311 "unsafeDefineClassCalls"); 1312 1313 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet"); 1314 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS, 1315 "loadInstanceClassFailRate"); 1316 1317 // increment the isUnsyncloadClass counter if UnsyncloadClass is set. 1318 if (UnsyncloadClass) { 1319 _isUnsyncloadClass->inc(); 1320 } 1321 } 1322 1323 // lookup zip library entry points 1324 load_zip_library(); 1325 // lookup jimage library entry points 1326 load_jimage_library(); 1327 #if INCLUDE_CDS 1328 // initialize search path 1329 if (DumpSharedSpaces) { 1330 _shared_paths_misc_info = SharedClassUtil::allocate_shared_paths_misc_info(); 1331 } 1332 #endif 1333 setup_bootstrap_search_path(); 1334 } 1335 1336 #if INCLUDE_CDS 1337 void ClassLoader::initialize_shared_path() { 1338 if (DumpSharedSpaces) { 1339 ClassLoaderExt::setup_search_paths(); 1340 _shared_paths_misc_info->write_jint(0); // see comments in SharedPathsMiscInfo::check() 1341 } 1342 } 1343 #endif 1344 1345 jlong ClassLoader::classloader_time_ms() { 1346 return UsePerfData ? 1347 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1; 1348 } 1349 1350 jlong ClassLoader::class_init_count() { 1351 return UsePerfData ? _perf_classes_inited->get_value() : -1; 1352 } 1353 1354 jlong ClassLoader::class_init_time_ms() { 1355 return UsePerfData ? 1356 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1; 1357 } 1358 1359 jlong ClassLoader::class_verify_time_ms() { 1360 return UsePerfData ? 1361 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1; 1362 } 1363 1364 jlong ClassLoader::class_link_count() { 1365 return UsePerfData ? _perf_classes_linked->get_value() : -1; 1366 } 1367 1368 jlong ClassLoader::class_link_time_ms() { 1369 return UsePerfData ? 1370 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1; 1371 } 1372 1373 int ClassLoader::compute_Object_vtable() { 1374 // hardwired for JDK1.2 -- would need to duplicate class file parsing 1375 // code to determine actual value from file 1376 // Would be value '11' if finals were in vtable 1377 int JDK_1_2_Object_vtable_size = 5; 1378 return JDK_1_2_Object_vtable_size * vtableEntry::size(); 1379 } 1380 1381 1382 void classLoader_init() { 1383 ClassLoader::initialize(); 1384 } 1385 1386 1387 bool ClassLoader::get_canonical_path(const char* orig, char* out, int len) { 1388 assert(orig != NULL && out != NULL && len > 0, "bad arguments"); 1389 if (CanonicalizeEntry != NULL) { 1390 JavaThread* THREAD = JavaThread::current(); 1391 JNIEnv* env = THREAD->jni_environment(); 1392 ResourceMark rm(THREAD); 1393 1394 // os::native_path writes into orig_copy 1395 char* orig_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, strlen(orig)+1); 1396 strcpy(orig_copy, orig); 1397 if ((CanonicalizeEntry)(env, os::native_path(orig_copy), out, len) < 0) { 1398 return false; 1399 } 1400 } else { 1401 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing 1402 strncpy(out, orig, len); 1403 out[len - 1] = '\0'; 1404 } 1405 return true; 1406 } 1407 1408 void ClassLoader::create_javabase() { 1409 Thread* THREAD = Thread::current(); 1410 1411 // Create java.base's module entry for the boot 1412 // class loader prior to loading j.l.Ojbect. 1413 ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data(); 1414 1415 // Get module entry table 1416 ModuleEntryTable* null_cld_modules = null_cld->modules(); 1417 if (null_cld_modules == NULL) { 1418 vm_exit_during_initialization("No ModuleEntryTable for the boot class loader"); 1419 } 1420 1421 { 1422 MutexLocker ml(Module_lock, THREAD); 1423 ModuleEntry* jb_module = null_cld_modules->locked_create_entry_or_null(Handle(NULL), vmSymbols::java_base(), NULL, NULL, null_cld); 1424 if (jb_module == NULL) { 1425 vm_exit_during_initialization("Unable to create ModuleEntry for java.base"); 1426 } 1427 ModuleEntryTable::set_javabase_module(jb_module); 1428 } 1429 1430 // When looking for the jimage file, only 1431 // search the boot loader's module path which 1432 // can consist of [-Xpatch]; exploded build | modules 1433 // Do not search the boot loader's append path. 1434 ClassPathEntry* e = _first_entry; 1435 ClassPathEntry* last_e = _first_append_entry; 1436 while ((e != NULL) && (e != last_e)) { 1437 JImageFile *jimage = e->jimage(); 1438 if (jimage != NULL && e->is_jrt()) { 1439 set_has_jimage(true); 1440 #if INCLUDE_CDS 1441 ClassLoader::initialize_module_loader_map(jimage); 1442 #endif 1443 return; 1444 } 1445 e = e->next(); 1446 } 1447 } 1448 1449 #ifndef PRODUCT 1450 1451 // CompileTheWorld 1452 // 1453 // Iterates over all class path entries and forces compilation of all methods 1454 // in all classes found. Currently, only zip/jar archives are searched. 1455 // 1456 // The classes are loaded by the Java level bootstrap class loader, and the 1457 // initializer is called. If DelayCompilationDuringStartup is true (default), 1458 // the interpreter will run the initialization code. Note that forcing 1459 // initialization in this way could potentially lead to initialization order 1460 // problems, in which case we could just force the initialization bit to be set. 1461 1462 1463 // We need to iterate over the contents of a zip/jar file, so we replicate the 1464 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile, 1465 // since jzfile already has a void* definition. 1466 // 1467 // Note that this is only used in debug mode. 1468 // 1469 // HotSpot integration note: 1470 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build 1471 1472 1473 // JDK 1.3 version 1474 typedef struct real_jzentry { /* Zip file entry */ 1475 char *name; /* entry name */ 1476 jint time; /* modification time */ 1477 jint size; /* size of uncompressed data */ 1478 jint csize; /* size of compressed data (zero if uncompressed) */ 1479 jint crc; /* crc of uncompressed data */ 1480 char *comment; /* optional zip file comment */ 1481 jbyte *extra; /* optional extra data */ 1482 jint pos; /* position of LOC header (if negative) or data */ 1483 } real_jzentry; 1484 1485 typedef struct real_jzfile { /* Zip file */ 1486 char *name; /* zip file name */ 1487 jint refs; /* number of active references */ 1488 jint fd; /* open file descriptor */ 1489 void *lock; /* read lock */ 1490 char *comment; /* zip file comment */ 1491 char *msg; /* zip error message */ 1492 void *entries; /* array of hash cells */ 1493 jint total; /* total number of entries */ 1494 unsigned short *table; /* Hash chain heads: indexes into entries */ 1495 jint tablelen; /* number of hash eads */ 1496 real_jzfile *next; /* next zip file in search list */ 1497 jzentry *cache; /* we cache the most recently freed jzentry */ 1498 /* Information on metadata names in META-INF directory */ 1499 char **metanames; /* array of meta names (may have null names) */ 1500 jint metacount; /* number of slots in metanames array */ 1501 /* If there are any per-entry comments, they are in the comments array */ 1502 char **comments; 1503 } real_jzfile; 1504 1505 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) { 1506 // For now we only compile all methods in all classes in zip/jar files 1507 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir); 1508 tty->cr(); 1509 } 1510 1511 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) { 1512 real_jzfile* zip = (real_jzfile*) _zip; 1513 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); 1514 tty->cr(); 1515 // Iterate over all entries in zip file 1516 for (int n = 0; ; n++) { 1517 real_jzentry * ze = (real_jzentry *)((*GetNextEntry)(_zip, n)); 1518 if (ze == NULL) break; 1519 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); 1520 } 1521 if (HAS_PENDING_EXCEPTION) { 1522 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1523 CLEAR_PENDING_EXCEPTION; 1524 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); 1525 tty->print_cr("Increase class metadata storage if a limit was set"); 1526 } else { 1527 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); 1528 } 1529 } 1530 } 1531 1532 void ClassLoader::compile_the_world() { 1533 EXCEPTION_MARK; 1534 HandleMark hm(THREAD); 1535 ResourceMark rm(THREAD); 1536 1537 // Find bootstrap loader 1538 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader()); 1539 // Iterate over all bootstrap class path entries 1540 ClassPathEntry* e = _first_entry; 1541 jlong start = os::javaTimeMillis(); 1542 while (e != NULL) { 1543 // We stop at "modules" jimage, unless it is the first bootstrap path entry 1544 if (e->is_jrt() && e != _first_entry) break; 1545 e->compile_the_world(system_class_loader, CATCH); 1546 e = e->next(); 1547 } 1548 jlong end = os::javaTimeMillis(); 1549 tty->print_cr("CompileTheWorld : Done (%d classes, %d methods, " JLONG_FORMAT " ms)", 1550 _compile_the_world_class_counter, _compile_the_world_method_counter, (end - start)); 1551 { 1552 // Print statistics as if before normal exit: 1553 extern void print_statistics(); 1554 print_statistics(); 1555 } 1556 vm_exit(0); 1557 } 1558 1559 int ClassLoader::_compile_the_world_class_counter = 0; 1560 int ClassLoader::_compile_the_world_method_counter = 0; 1561 static int _codecache_sweep_counter = 0; 1562 1563 // Filter out all exceptions except OOMs 1564 static void clear_pending_exception_if_not_oom(TRAPS) { 1565 if (HAS_PENDING_EXCEPTION && 1566 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1567 CLEAR_PENDING_EXCEPTION; 1568 } 1569 // The CHECK at the caller will propagate the exception out 1570 } 1571 1572 /** 1573 * Returns if the given method should be compiled when doing compile-the-world. 1574 * 1575 * TODO: This should be a private method in a CompileTheWorld class. 1576 */ 1577 static bool can_be_compiled(methodHandle m, int comp_level) { 1578 assert(CompileTheWorld, "must be"); 1579 1580 // It's not valid to compile a native wrapper for MethodHandle methods 1581 // that take a MemberName appendix since the bytecode signature is not 1582 // correct. 1583 vmIntrinsics::ID iid = m->intrinsic_id(); 1584 if (MethodHandles::is_signature_polymorphic(iid) && MethodHandles::has_member_arg(iid)) { 1585 return false; 1586 } 1587 1588 return CompilationPolicy::can_be_compiled(m, comp_level); 1589 } 1590 1591 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) { 1592 if (string_ends_with(name, ".class")) { 1593 // We have a .class file 1594 int len = (int)strlen(name); 1595 char buffer[2048]; 1596 strncpy(buffer, name, len - 6); 1597 buffer[len-6] = 0; 1598 // If the file has a period after removing .class, it's not really a 1599 // valid class file. The class loader will check everything else. 1600 if (strchr(buffer, '.') == NULL) { 1601 _compile_the_world_class_counter++; 1602 if (_compile_the_world_class_counter > CompileTheWorldStopAt) return; 1603 1604 // Construct name without extension 1605 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK); 1606 // Use loader to load and initialize class 1607 Klass* ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD); 1608 instanceKlassHandle k (THREAD, ik); 1609 if (k.not_null() && !HAS_PENDING_EXCEPTION) { 1610 k->initialize(THREAD); 1611 } 1612 bool exception_occurred = HAS_PENDING_EXCEPTION; 1613 clear_pending_exception_if_not_oom(CHECK); 1614 if (CompileTheWorldPreloadClasses && k.not_null()) { 1615 ConstantPool::preload_and_initialize_all_classes(k->constants(), THREAD); 1616 if (HAS_PENDING_EXCEPTION) { 1617 // If something went wrong in preloading we just ignore it 1618 clear_pending_exception_if_not_oom(CHECK); 1619 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_class_counter, buffer); 1620 } 1621 } 1622 1623 if (_compile_the_world_class_counter >= CompileTheWorldStartAt) { 1624 if (k.is_null() || exception_occurred) { 1625 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class 1626 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_class_counter, buffer); 1627 } else { 1628 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_class_counter, buffer); 1629 // Preload all classes to get around uncommon traps 1630 // Iterate over all methods in class 1631 int comp_level = CompilationPolicy::policy()->initial_compile_level(); 1632 for (int n = 0; n < k->methods()->length(); n++) { 1633 methodHandle m (THREAD, k->methods()->at(n)); 1634 if (can_be_compiled(m, comp_level)) { 1635 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) { 1636 // Give sweeper a chance to keep up with CTW 1637 VM_ForceSafepoint op; 1638 VMThread::execute(&op); 1639 _codecache_sweep_counter = 0; 1640 } 1641 // Force compilation 1642 CompileBroker::compile_method(m, InvocationEntryBci, comp_level, 1643 methodHandle(), 0, CompileTask::Reason_CTW, THREAD); 1644 if (HAS_PENDING_EXCEPTION) { 1645 clear_pending_exception_if_not_oom(CHECK); 1646 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 1647 } else { 1648 _compile_the_world_method_counter++; 1649 } 1650 if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) { 1651 // Clobber the first compile and force second tier compilation 1652 CompiledMethod* nm = m->code(); 1653 if (nm != NULL && !m->is_method_handle_intrinsic()) { 1654 // Throw out the code so that the code cache doesn't fill up 1655 nm->make_not_entrant(); 1656 m->clear_code(); 1657 } 1658 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization, 1659 methodHandle(), 0, CompileTask::Reason_CTW, THREAD); 1660 if (HAS_PENDING_EXCEPTION) { 1661 clear_pending_exception_if_not_oom(CHECK); 1662 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 1663 } else { 1664 _compile_the_world_method_counter++; 1665 } 1666 } 1667 } else { 1668 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 1669 } 1670 1671 CompiledMethod* nm = m->code(); 1672 if (nm != NULL && !m->is_method_handle_intrinsic()) { 1673 // Throw out the code so that the code cache doesn't fill up 1674 nm->make_not_entrant(); 1675 m->clear_code(); 1676 } 1677 } 1678 } 1679 } 1680 } 1681 } 1682 } 1683 1684 #endif //PRODUCT 1685 1686 // Please keep following two functions at end of this file. With them placed at top or in middle of the file, 1687 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589. 1688 void PerfClassTraceTime::initialize() { 1689 if (!UsePerfData) return; 1690 1691 if (_eventp != NULL) { 1692 // increment the event counter 1693 _eventp->inc(); 1694 } 1695 1696 // stop the current active thread-local timer to measure inclusive time 1697 _prev_active_event = -1; 1698 for (int i=0; i < EVENT_TYPE_COUNT; i++) { 1699 if (_timers[i].is_active()) { 1700 assert(_prev_active_event == -1, "should have only one active timer"); 1701 _prev_active_event = i; 1702 _timers[i].stop(); 1703 } 1704 } 1705 1706 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) { 1707 // start the inclusive timer if not recursively called 1708 _t.start(); 1709 } 1710 1711 // start thread-local timer of the given event type 1712 if (!_timers[_event_type].is_active()) { 1713 _timers[_event_type].start(); 1714 } 1715 } 1716 1717 PerfClassTraceTime::~PerfClassTraceTime() { 1718 if (!UsePerfData) return; 1719 1720 // stop the thread-local timer as the event completes 1721 // and resume the thread-local timer of the event next on the stack 1722 _timers[_event_type].stop(); 1723 jlong selftime = _timers[_event_type].ticks(); 1724 1725 if (_prev_active_event >= 0) { 1726 _timers[_prev_active_event].start(); 1727 } 1728 1729 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return; 1730 1731 // increment the counters only on the leaf call 1732 _t.stop(); 1733 _timep->inc(_t.ticks()); 1734 if (_selftimep != NULL) { 1735 _selftimep->inc(selftime); 1736 } 1737 // add all class loading related event selftime to the accumulated time counter 1738 ClassLoader::perf_accumulated_time()->inc(selftime); 1739 1740 // reset the timer 1741 _timers[_event_type].reset(); 1742 }